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5222 lines
148 KiB
5222 lines
148 KiB
/* |
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* builtin-trace.c |
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* |
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* Builtin 'trace' command: |
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* |
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* Display a continuously updated trace of any workload, CPU, specific PID, |
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* system wide, etc. Default format is loosely strace like, but any other |
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* event may be specified using --event. |
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* |
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* Copyright (C) 2012, 2013, 2014, 2015 Red Hat Inc, Arnaldo Carvalho de Melo <[email protected]> |
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* |
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* Initially based on the 'trace' prototype by Thomas Gleixner: |
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* |
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* http://lwn.net/Articles/415728/ ("Announcing a new utility: 'trace'") |
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*/ |
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|
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#include "util/record.h" |
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#include <traceevent/event-parse.h> |
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#include <api/fs/tracing_path.h> |
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#include <bpf/bpf.h> |
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#include "util/bpf_map.h" |
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#include "util/rlimit.h" |
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#include "builtin.h" |
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#include "util/cgroup.h" |
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#include "util/color.h" |
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#include "util/config.h" |
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#include "util/debug.h" |
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#include "util/dso.h" |
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#include "util/env.h" |
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#include "util/event.h" |
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#include "util/evsel.h" |
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#include "util/evsel_fprintf.h" |
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#include "util/synthetic-events.h" |
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#include "util/evlist.h" |
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#include "util/evswitch.h" |
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#include "util/mmap.h" |
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#include <subcmd/pager.h> |
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#include <subcmd/exec-cmd.h> |
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#include "util/machine.h" |
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#include "util/map.h" |
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#include "util/symbol.h" |
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#include "util/path.h" |
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#include "util/session.h" |
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#include "util/thread.h" |
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#include <subcmd/parse-options.h> |
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#include "util/strlist.h" |
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#include "util/intlist.h" |
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#include "util/thread_map.h" |
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#include "util/stat.h" |
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#include "util/tool.h" |
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#include "util/util.h" |
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#include "trace/beauty/beauty.h" |
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#include "trace-event.h" |
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#include "util/parse-events.h" |
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#include "util/bpf-loader.h" |
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#include "util/tracepoint.h" |
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#include "callchain.h" |
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#include "print_binary.h" |
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#include "string2.h" |
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#include "syscalltbl.h" |
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#include "rb_resort.h" |
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#include "../perf.h" |
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|
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#include <errno.h> |
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#include <inttypes.h> |
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#include <poll.h> |
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#include <signal.h> |
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#include <stdlib.h> |
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#include <string.h> |
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#include <linux/err.h> |
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#include <linux/filter.h> |
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#include <linux/kernel.h> |
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#include <linux/random.h> |
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#include <linux/stringify.h> |
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#include <linux/time64.h> |
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#include <linux/zalloc.h> |
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#include <fcntl.h> |
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#include <sys/sysmacros.h> |
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|
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#include <linux/ctype.h> |
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#include <perf/mmap.h> |
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|
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#ifndef O_CLOEXEC |
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# define O_CLOEXEC 02000000 |
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#endif |
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|
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#ifndef F_LINUX_SPECIFIC_BASE |
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# define F_LINUX_SPECIFIC_BASE 1024 |
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#endif |
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|
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/* |
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* strtoul: Go from a string to a value, i.e. for msr: MSR_FS_BASE to 0xc0000100 |
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*/ |
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struct syscall_arg_fmt { |
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size_t (*scnprintf)(char *bf, size_t size, struct syscall_arg *arg); |
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bool (*strtoul)(char *bf, size_t size, struct syscall_arg *arg, u64 *val); |
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unsigned long (*mask_val)(struct syscall_arg *arg, unsigned long val); |
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void *parm; |
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const char *name; |
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u16 nr_entries; // for arrays |
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bool show_zero; |
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}; |
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|
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struct syscall_fmt { |
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const char *name; |
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const char *alias; |
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struct { |
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const char *sys_enter, |
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*sys_exit; |
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} bpf_prog_name; |
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struct syscall_arg_fmt arg[6]; |
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u8 nr_args; |
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bool errpid; |
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bool timeout; |
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bool hexret; |
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}; |
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|
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struct trace { |
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struct perf_tool tool; |
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struct syscalltbl *sctbl; |
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struct { |
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struct syscall *table; |
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struct bpf_map *map; |
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struct { // per syscall BPF_MAP_TYPE_PROG_ARRAY |
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struct bpf_map *sys_enter, |
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*sys_exit; |
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} prog_array; |
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struct { |
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struct evsel *sys_enter, |
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*sys_exit, |
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*augmented; |
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} events; |
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struct bpf_program *unaugmented_prog; |
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} syscalls; |
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struct { |
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struct bpf_map *map; |
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} dump; |
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struct record_opts opts; |
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struct evlist *evlist; |
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struct machine *host; |
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struct thread *current; |
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struct bpf_object *bpf_obj; |
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struct cgroup *cgroup; |
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u64 base_time; |
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FILE *output; |
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unsigned long nr_events; |
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unsigned long nr_events_printed; |
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unsigned long max_events; |
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struct evswitch evswitch; |
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struct strlist *ev_qualifier; |
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struct { |
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size_t nr; |
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int *entries; |
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} ev_qualifier_ids; |
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struct { |
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size_t nr; |
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pid_t *entries; |
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struct bpf_map *map; |
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} filter_pids; |
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double duration_filter; |
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double runtime_ms; |
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struct { |
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u64 vfs_getname, |
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proc_getname; |
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} stats; |
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unsigned int max_stack; |
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unsigned int min_stack; |
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int raw_augmented_syscalls_args_size; |
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bool raw_augmented_syscalls; |
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bool fd_path_disabled; |
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bool sort_events; |
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bool not_ev_qualifier; |
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bool live; |
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bool full_time; |
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bool sched; |
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bool multiple_threads; |
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bool summary; |
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bool summary_only; |
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bool errno_summary; |
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bool failure_only; |
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bool show_comm; |
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bool print_sample; |
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bool show_tool_stats; |
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bool trace_syscalls; |
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bool libtraceevent_print; |
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bool kernel_syscallchains; |
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s16 args_alignment; |
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bool show_tstamp; |
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bool show_duration; |
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bool show_zeros; |
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bool show_arg_names; |
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bool show_string_prefix; |
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bool force; |
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bool vfs_getname; |
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int trace_pgfaults; |
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char *perfconfig_events; |
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struct { |
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struct ordered_events data; |
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u64 last; |
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} oe; |
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}; |
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|
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struct tp_field { |
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int offset; |
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union { |
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u64 (*integer)(struct tp_field *field, struct perf_sample *sample); |
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void *(*pointer)(struct tp_field *field, struct perf_sample *sample); |
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}; |
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}; |
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|
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#define TP_UINT_FIELD(bits) \ |
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static u64 tp_field__u##bits(struct tp_field *field, struct perf_sample *sample) \ |
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{ \ |
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u##bits value; \ |
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memcpy(&value, sample->raw_data + field->offset, sizeof(value)); \ |
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return value; \ |
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} |
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|
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TP_UINT_FIELD(8); |
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TP_UINT_FIELD(16); |
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TP_UINT_FIELD(32); |
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TP_UINT_FIELD(64); |
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|
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#define TP_UINT_FIELD__SWAPPED(bits) \ |
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static u64 tp_field__swapped_u##bits(struct tp_field *field, struct perf_sample *sample) \ |
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{ \ |
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u##bits value; \ |
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memcpy(&value, sample->raw_data + field->offset, sizeof(value)); \ |
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return bswap_##bits(value);\ |
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} |
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|
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TP_UINT_FIELD__SWAPPED(16); |
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TP_UINT_FIELD__SWAPPED(32); |
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TP_UINT_FIELD__SWAPPED(64); |
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|
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static int __tp_field__init_uint(struct tp_field *field, int size, int offset, bool needs_swap) |
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{ |
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field->offset = offset; |
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|
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switch (size) { |
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case 1: |
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field->integer = tp_field__u8; |
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break; |
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case 2: |
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field->integer = needs_swap ? tp_field__swapped_u16 : tp_field__u16; |
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break; |
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case 4: |
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field->integer = needs_swap ? tp_field__swapped_u32 : tp_field__u32; |
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break; |
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case 8: |
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field->integer = needs_swap ? tp_field__swapped_u64 : tp_field__u64; |
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break; |
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default: |
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return -1; |
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} |
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|
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return 0; |
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} |
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|
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static int tp_field__init_uint(struct tp_field *field, struct tep_format_field *format_field, bool needs_swap) |
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{ |
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return __tp_field__init_uint(field, format_field->size, format_field->offset, needs_swap); |
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} |
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|
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static void *tp_field__ptr(struct tp_field *field, struct perf_sample *sample) |
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{ |
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return sample->raw_data + field->offset; |
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} |
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|
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static int __tp_field__init_ptr(struct tp_field *field, int offset) |
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{ |
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field->offset = offset; |
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field->pointer = tp_field__ptr; |
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return 0; |
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} |
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|
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static int tp_field__init_ptr(struct tp_field *field, struct tep_format_field *format_field) |
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{ |
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return __tp_field__init_ptr(field, format_field->offset); |
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} |
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struct syscall_tp { |
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struct tp_field id; |
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union { |
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struct tp_field args, ret; |
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}; |
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}; |
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|
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/* |
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* The evsel->priv as used by 'perf trace' |
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* sc: for raw_syscalls:sys_{enter,exit} and syscalls:sys_{enter,exit}_SYSCALLNAME |
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* fmt: for all the other tracepoints |
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*/ |
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struct evsel_trace { |
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struct syscall_tp sc; |
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struct syscall_arg_fmt *fmt; |
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}; |
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|
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static struct evsel_trace *evsel_trace__new(void) |
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{ |
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return zalloc(sizeof(struct evsel_trace)); |
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} |
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|
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static void evsel_trace__delete(struct evsel_trace *et) |
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{ |
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if (et == NULL) |
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return; |
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|
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zfree(&et->fmt); |
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free(et); |
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} |
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|
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/* |
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* Used with raw_syscalls:sys_{enter,exit} and with the |
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* syscalls:sys_{enter,exit}_SYSCALL tracepoints |
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*/ |
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static inline struct syscall_tp *__evsel__syscall_tp(struct evsel *evsel) |
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{ |
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struct evsel_trace *et = evsel->priv; |
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|
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return &et->sc; |
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} |
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|
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static struct syscall_tp *evsel__syscall_tp(struct evsel *evsel) |
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{ |
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if (evsel->priv == NULL) { |
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evsel->priv = evsel_trace__new(); |
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if (evsel->priv == NULL) |
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return NULL; |
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} |
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|
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return __evsel__syscall_tp(evsel); |
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} |
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|
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/* |
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* Used with all the other tracepoints. |
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*/ |
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static inline struct syscall_arg_fmt *__evsel__syscall_arg_fmt(struct evsel *evsel) |
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{ |
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struct evsel_trace *et = evsel->priv; |
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|
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return et->fmt; |
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} |
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|
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static struct syscall_arg_fmt *evsel__syscall_arg_fmt(struct evsel *evsel) |
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{ |
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struct evsel_trace *et = evsel->priv; |
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|
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if (evsel->priv == NULL) { |
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et = evsel->priv = evsel_trace__new(); |
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|
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if (et == NULL) |
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return NULL; |
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} |
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|
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if (et->fmt == NULL) { |
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et->fmt = calloc(evsel->tp_format->format.nr_fields, sizeof(struct syscall_arg_fmt)); |
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if (et->fmt == NULL) |
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goto out_delete; |
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} |
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|
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return __evsel__syscall_arg_fmt(evsel); |
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|
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out_delete: |
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evsel_trace__delete(evsel->priv); |
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evsel->priv = NULL; |
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return NULL; |
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} |
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|
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static int evsel__init_tp_uint_field(struct evsel *evsel, struct tp_field *field, const char *name) |
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{ |
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struct tep_format_field *format_field = evsel__field(evsel, name); |
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|
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if (format_field == NULL) |
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return -1; |
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|
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return tp_field__init_uint(field, format_field, evsel->needs_swap); |
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} |
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|
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#define perf_evsel__init_sc_tp_uint_field(evsel, name) \ |
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({ struct syscall_tp *sc = __evsel__syscall_tp(evsel);\ |
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evsel__init_tp_uint_field(evsel, &sc->name, #name); }) |
|
|
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static int evsel__init_tp_ptr_field(struct evsel *evsel, struct tp_field *field, const char *name) |
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{ |
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struct tep_format_field *format_field = evsel__field(evsel, name); |
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|
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if (format_field == NULL) |
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return -1; |
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|
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return tp_field__init_ptr(field, format_field); |
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} |
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|
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#define perf_evsel__init_sc_tp_ptr_field(evsel, name) \ |
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({ struct syscall_tp *sc = __evsel__syscall_tp(evsel);\ |
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evsel__init_tp_ptr_field(evsel, &sc->name, #name); }) |
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|
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static void evsel__delete_priv(struct evsel *evsel) |
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{ |
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zfree(&evsel->priv); |
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evsel__delete(evsel); |
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} |
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|
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static int evsel__init_syscall_tp(struct evsel *evsel) |
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{ |
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struct syscall_tp *sc = evsel__syscall_tp(evsel); |
|
|
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if (sc != NULL) { |
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if (evsel__init_tp_uint_field(evsel, &sc->id, "__syscall_nr") && |
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evsel__init_tp_uint_field(evsel, &sc->id, "nr")) |
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return -ENOENT; |
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return 0; |
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} |
|
|
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return -ENOMEM; |
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} |
|
|
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static int evsel__init_augmented_syscall_tp(struct evsel *evsel, struct evsel *tp) |
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{ |
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struct syscall_tp *sc = evsel__syscall_tp(evsel); |
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|
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if (sc != NULL) { |
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struct tep_format_field *syscall_id = evsel__field(tp, "id"); |
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if (syscall_id == NULL) |
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syscall_id = evsel__field(tp, "__syscall_nr"); |
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if (syscall_id == NULL || |
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__tp_field__init_uint(&sc->id, syscall_id->size, syscall_id->offset, evsel->needs_swap)) |
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return -EINVAL; |
|
|
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return 0; |
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} |
|
|
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return -ENOMEM; |
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} |
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|
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static int evsel__init_augmented_syscall_tp_args(struct evsel *evsel) |
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{ |
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struct syscall_tp *sc = __evsel__syscall_tp(evsel); |
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|
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return __tp_field__init_ptr(&sc->args, sc->id.offset + sizeof(u64)); |
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} |
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|
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static int evsel__init_augmented_syscall_tp_ret(struct evsel *evsel) |
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{ |
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struct syscall_tp *sc = __evsel__syscall_tp(evsel); |
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|
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return __tp_field__init_uint(&sc->ret, sizeof(u64), sc->id.offset + sizeof(u64), evsel->needs_swap); |
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} |
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|
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static int evsel__init_raw_syscall_tp(struct evsel *evsel, void *handler) |
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{ |
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if (evsel__syscall_tp(evsel) != NULL) { |
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if (perf_evsel__init_sc_tp_uint_field(evsel, id)) |
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return -ENOENT; |
|
|
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evsel->handler = handler; |
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return 0; |
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} |
|
|
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return -ENOMEM; |
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} |
|
|
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static struct evsel *perf_evsel__raw_syscall_newtp(const char *direction, void *handler) |
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{ |
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struct evsel *evsel = evsel__newtp("raw_syscalls", direction); |
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|
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/* older kernel (e.g., RHEL6) use syscalls:{enter,exit} */ |
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if (IS_ERR(evsel)) |
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evsel = evsel__newtp("syscalls", direction); |
|
|
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if (IS_ERR(evsel)) |
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return NULL; |
|
|
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if (evsel__init_raw_syscall_tp(evsel, handler)) |
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goto out_delete; |
|
|
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return evsel; |
|
|
|
out_delete: |
|
evsel__delete_priv(evsel); |
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return NULL; |
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} |
|
|
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#define perf_evsel__sc_tp_uint(evsel, name, sample) \ |
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({ struct syscall_tp *fields = __evsel__syscall_tp(evsel); \ |
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fields->name.integer(&fields->name, sample); }) |
|
|
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#define perf_evsel__sc_tp_ptr(evsel, name, sample) \ |
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({ struct syscall_tp *fields = __evsel__syscall_tp(evsel); \ |
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fields->name.pointer(&fields->name, sample); }) |
|
|
|
size_t strarray__scnprintf_suffix(struct strarray *sa, char *bf, size_t size, const char *intfmt, bool show_suffix, int val) |
|
{ |
|
int idx = val - sa->offset; |
|
|
|
if (idx < 0 || idx >= sa->nr_entries || sa->entries[idx] == NULL) { |
|
size_t printed = scnprintf(bf, size, intfmt, val); |
|
if (show_suffix) |
|
printed += scnprintf(bf + printed, size - printed, " /* %s??? */", sa->prefix); |
|
return printed; |
|
} |
|
|
|
return scnprintf(bf, size, "%s%s", sa->entries[idx], show_suffix ? sa->prefix : ""); |
|
} |
|
|
|
size_t strarray__scnprintf(struct strarray *sa, char *bf, size_t size, const char *intfmt, bool show_prefix, int val) |
|
{ |
|
int idx = val - sa->offset; |
|
|
|
if (idx < 0 || idx >= sa->nr_entries || sa->entries[idx] == NULL) { |
|
size_t printed = scnprintf(bf, size, intfmt, val); |
|
if (show_prefix) |
|
printed += scnprintf(bf + printed, size - printed, " /* %s??? */", sa->prefix); |
|
return printed; |
|
} |
|
|
|
return scnprintf(bf, size, "%s%s", show_prefix ? sa->prefix : "", sa->entries[idx]); |
|
} |
|
|
|
static size_t __syscall_arg__scnprintf_strarray(char *bf, size_t size, |
|
const char *intfmt, |
|
struct syscall_arg *arg) |
|
{ |
|
return strarray__scnprintf(arg->parm, bf, size, intfmt, arg->show_string_prefix, arg->val); |
|
} |
|
|
|
static size_t syscall_arg__scnprintf_strarray(char *bf, size_t size, |
|
struct syscall_arg *arg) |
|
{ |
|
return __syscall_arg__scnprintf_strarray(bf, size, "%d", arg); |
|
} |
|
|
|
#define SCA_STRARRAY syscall_arg__scnprintf_strarray |
|
|
|
bool syscall_arg__strtoul_strarray(char *bf, size_t size, struct syscall_arg *arg, u64 *ret) |
|
{ |
|
return strarray__strtoul(arg->parm, bf, size, ret); |
|
} |
|
|
|
bool syscall_arg__strtoul_strarray_flags(char *bf, size_t size, struct syscall_arg *arg, u64 *ret) |
|
{ |
|
return strarray__strtoul_flags(arg->parm, bf, size, ret); |
|
} |
|
|
|
bool syscall_arg__strtoul_strarrays(char *bf, size_t size, struct syscall_arg *arg, u64 *ret) |
|
{ |
|
return strarrays__strtoul(arg->parm, bf, size, ret); |
|
} |
|
|
|
size_t syscall_arg__scnprintf_strarray_flags(char *bf, size_t size, struct syscall_arg *arg) |
|
{ |
|
return strarray__scnprintf_flags(arg->parm, bf, size, arg->show_string_prefix, arg->val); |
|
} |
|
|
|
size_t strarrays__scnprintf(struct strarrays *sas, char *bf, size_t size, const char *intfmt, bool show_prefix, int val) |
|
{ |
|
size_t printed; |
|
int i; |
|
|
|
for (i = 0; i < sas->nr_entries; ++i) { |
|
struct strarray *sa = sas->entries[i]; |
|
int idx = val - sa->offset; |
|
|
|
if (idx >= 0 && idx < sa->nr_entries) { |
|
if (sa->entries[idx] == NULL) |
|
break; |
|
return scnprintf(bf, size, "%s%s", show_prefix ? sa->prefix : "", sa->entries[idx]); |
|
} |
|
} |
|
|
|
printed = scnprintf(bf, size, intfmt, val); |
|
if (show_prefix) |
|
printed += scnprintf(bf + printed, size - printed, " /* %s??? */", sas->entries[0]->prefix); |
|
return printed; |
|
} |
|
|
|
bool strarray__strtoul(struct strarray *sa, char *bf, size_t size, u64 *ret) |
|
{ |
|
int i; |
|
|
|
for (i = 0; i < sa->nr_entries; ++i) { |
|
if (sa->entries[i] && strncmp(sa->entries[i], bf, size) == 0 && sa->entries[i][size] == '\0') { |
|
*ret = sa->offset + i; |
|
return true; |
|
} |
|
} |
|
|
|
return false; |
|
} |
|
|
|
bool strarray__strtoul_flags(struct strarray *sa, char *bf, size_t size, u64 *ret) |
|
{ |
|
u64 val = 0; |
|
char *tok = bf, *sep, *end; |
|
|
|
*ret = 0; |
|
|
|
while (size != 0) { |
|
int toklen = size; |
|
|
|
sep = memchr(tok, '|', size); |
|
if (sep != NULL) { |
|
size -= sep - tok + 1; |
|
|
|
end = sep - 1; |
|
while (end > tok && isspace(*end)) |
|
--end; |
|
|
|
toklen = end - tok + 1; |
|
} |
|
|
|
while (isspace(*tok)) |
|
++tok; |
|
|
|
if (isalpha(*tok) || *tok == '_') { |
|
if (!strarray__strtoul(sa, tok, toklen, &val)) |
|
return false; |
|
} else { |
|
bool is_hexa = tok[0] == 0 && (tok[1] = 'x' || tok[1] == 'X'); |
|
|
|
val = strtoul(tok, NULL, is_hexa ? 16 : 0); |
|
} |
|
|
|
*ret |= (1 << (val - 1)); |
|
|
|
if (sep == NULL) |
|
break; |
|
tok = sep + 1; |
|
} |
|
|
|
return true; |
|
} |
|
|
|
bool strarrays__strtoul(struct strarrays *sas, char *bf, size_t size, u64 *ret) |
|
{ |
|
int i; |
|
|
|
for (i = 0; i < sas->nr_entries; ++i) { |
|
struct strarray *sa = sas->entries[i]; |
|
|
|
if (strarray__strtoul(sa, bf, size, ret)) |
|
return true; |
|
} |
|
|
|
return false; |
|
} |
|
|
|
size_t syscall_arg__scnprintf_strarrays(char *bf, size_t size, |
|
struct syscall_arg *arg) |
|
{ |
|
return strarrays__scnprintf(arg->parm, bf, size, "%d", arg->show_string_prefix, arg->val); |
|
} |
|
|
|
#ifndef AT_FDCWD |
|
#define AT_FDCWD -100 |
|
#endif |
|
|
|
static size_t syscall_arg__scnprintf_fd_at(char *bf, size_t size, |
|
struct syscall_arg *arg) |
|
{ |
|
int fd = arg->val; |
|
const char *prefix = "AT_FD"; |
|
|
|
if (fd == AT_FDCWD) |
|
return scnprintf(bf, size, "%s%s", arg->show_string_prefix ? prefix : "", "CWD"); |
|
|
|
return syscall_arg__scnprintf_fd(bf, size, arg); |
|
} |
|
|
|
#define SCA_FDAT syscall_arg__scnprintf_fd_at |
|
|
|
static size_t syscall_arg__scnprintf_close_fd(char *bf, size_t size, |
|
struct syscall_arg *arg); |
|
|
|
#define SCA_CLOSE_FD syscall_arg__scnprintf_close_fd |
|
|
|
size_t syscall_arg__scnprintf_hex(char *bf, size_t size, struct syscall_arg *arg) |
|
{ |
|
return scnprintf(bf, size, "%#lx", arg->val); |
|
} |
|
|
|
size_t syscall_arg__scnprintf_ptr(char *bf, size_t size, struct syscall_arg *arg) |
|
{ |
|
if (arg->val == 0) |
|
return scnprintf(bf, size, "NULL"); |
|
return syscall_arg__scnprintf_hex(bf, size, arg); |
|
} |
|
|
|
size_t syscall_arg__scnprintf_int(char *bf, size_t size, struct syscall_arg *arg) |
|
{ |
|
return scnprintf(bf, size, "%d", arg->val); |
|
} |
|
|
|
size_t syscall_arg__scnprintf_long(char *bf, size_t size, struct syscall_arg *arg) |
|
{ |
|
return scnprintf(bf, size, "%ld", arg->val); |
|
} |
|
|
|
static size_t syscall_arg__scnprintf_char_array(char *bf, size_t size, struct syscall_arg *arg) |
|
{ |
|
// XXX Hey, maybe for sched:sched_switch prev/next comm fields we can |
|
// fill missing comms using thread__set_comm()... |
|
// here or in a special syscall_arg__scnprintf_pid_sched_tp... |
|
return scnprintf(bf, size, "\"%-.*s\"", arg->fmt->nr_entries ?: arg->len, arg->val); |
|
} |
|
|
|
#define SCA_CHAR_ARRAY syscall_arg__scnprintf_char_array |
|
|
|
static const char *bpf_cmd[] = { |
|
"MAP_CREATE", "MAP_LOOKUP_ELEM", "MAP_UPDATE_ELEM", "MAP_DELETE_ELEM", |
|
"MAP_GET_NEXT_KEY", "PROG_LOAD", "OBJ_PIN", "OBJ_GET", "PROG_ATTACH", |
|
"PROG_DETACH", "PROG_TEST_RUN", "PROG_GET_NEXT_ID", "MAP_GET_NEXT_ID", |
|
"PROG_GET_FD_BY_ID", "MAP_GET_FD_BY_ID", "OBJ_GET_INFO_BY_FD", |
|
"PROG_QUERY", "RAW_TRACEPOINT_OPEN", "BTF_LOAD", "BTF_GET_FD_BY_ID", |
|
"TASK_FD_QUERY", "MAP_LOOKUP_AND_DELETE_ELEM", "MAP_FREEZE", |
|
"BTF_GET_NEXT_ID", "MAP_LOOKUP_BATCH", "MAP_LOOKUP_AND_DELETE_BATCH", |
|
"MAP_UPDATE_BATCH", "MAP_DELETE_BATCH", "LINK_CREATE", "LINK_UPDATE", |
|
"LINK_GET_FD_BY_ID", "LINK_GET_NEXT_ID", "ENABLE_STATS", "ITER_CREATE", |
|
"LINK_DETACH", "PROG_BIND_MAP", |
|
}; |
|
static DEFINE_STRARRAY(bpf_cmd, "BPF_"); |
|
|
|
static const char *fsmount_flags[] = { |
|
[1] = "CLOEXEC", |
|
}; |
|
static DEFINE_STRARRAY(fsmount_flags, "FSMOUNT_"); |
|
|
|
#include "trace/beauty/generated/fsconfig_arrays.c" |
|
|
|
static DEFINE_STRARRAY(fsconfig_cmds, "FSCONFIG_"); |
|
|
|
static const char *epoll_ctl_ops[] = { "ADD", "DEL", "MOD", }; |
|
static DEFINE_STRARRAY_OFFSET(epoll_ctl_ops, "EPOLL_CTL_", 1); |
|
|
|
static const char *itimers[] = { "REAL", "VIRTUAL", "PROF", }; |
|
static DEFINE_STRARRAY(itimers, "ITIMER_"); |
|
|
|
static const char *keyctl_options[] = { |
|
"GET_KEYRING_ID", "JOIN_SESSION_KEYRING", "UPDATE", "REVOKE", "CHOWN", |
|
"SETPERM", "DESCRIBE", "CLEAR", "LINK", "UNLINK", "SEARCH", "READ", |
|
"INSTANTIATE", "NEGATE", "SET_REQKEY_KEYRING", "SET_TIMEOUT", |
|
"ASSUME_AUTHORITY", "GET_SECURITY", "SESSION_TO_PARENT", "REJECT", |
|
"INSTANTIATE_IOV", "INVALIDATE", "GET_PERSISTENT", |
|
}; |
|
static DEFINE_STRARRAY(keyctl_options, "KEYCTL_"); |
|
|
|
static const char *whences[] = { "SET", "CUR", "END", |
|
#ifdef SEEK_DATA |
|
"DATA", |
|
#endif |
|
#ifdef SEEK_HOLE |
|
"HOLE", |
|
#endif |
|
}; |
|
static DEFINE_STRARRAY(whences, "SEEK_"); |
|
|
|
static const char *fcntl_cmds[] = { |
|
"DUPFD", "GETFD", "SETFD", "GETFL", "SETFL", "GETLK", "SETLK", |
|
"SETLKW", "SETOWN", "GETOWN", "SETSIG", "GETSIG", "GETLK64", |
|
"SETLK64", "SETLKW64", "SETOWN_EX", "GETOWN_EX", |
|
"GETOWNER_UIDS", |
|
}; |
|
static DEFINE_STRARRAY(fcntl_cmds, "F_"); |
|
|
|
static const char *fcntl_linux_specific_cmds[] = { |
|
"SETLEASE", "GETLEASE", "NOTIFY", [5] = "CANCELLK", "DUPFD_CLOEXEC", |
|
"SETPIPE_SZ", "GETPIPE_SZ", "ADD_SEALS", "GET_SEALS", |
|
"GET_RW_HINT", "SET_RW_HINT", "GET_FILE_RW_HINT", "SET_FILE_RW_HINT", |
|
}; |
|
|
|
static DEFINE_STRARRAY_OFFSET(fcntl_linux_specific_cmds, "F_", F_LINUX_SPECIFIC_BASE); |
|
|
|
static struct strarray *fcntl_cmds_arrays[] = { |
|
&strarray__fcntl_cmds, |
|
&strarray__fcntl_linux_specific_cmds, |
|
}; |
|
|
|
static DEFINE_STRARRAYS(fcntl_cmds_arrays); |
|
|
|
static const char *rlimit_resources[] = { |
|
"CPU", "FSIZE", "DATA", "STACK", "CORE", "RSS", "NPROC", "NOFILE", |
|
"MEMLOCK", "AS", "LOCKS", "SIGPENDING", "MSGQUEUE", "NICE", "RTPRIO", |
|
"RTTIME", |
|
}; |
|
static DEFINE_STRARRAY(rlimit_resources, "RLIMIT_"); |
|
|
|
static const char *sighow[] = { "BLOCK", "UNBLOCK", "SETMASK", }; |
|
static DEFINE_STRARRAY(sighow, "SIG_"); |
|
|
|
static const char *clockid[] = { |
|
"REALTIME", "MONOTONIC", "PROCESS_CPUTIME_ID", "THREAD_CPUTIME_ID", |
|
"MONOTONIC_RAW", "REALTIME_COARSE", "MONOTONIC_COARSE", "BOOTTIME", |
|
"REALTIME_ALARM", "BOOTTIME_ALARM", "SGI_CYCLE", "TAI" |
|
}; |
|
static DEFINE_STRARRAY(clockid, "CLOCK_"); |
|
|
|
static size_t syscall_arg__scnprintf_access_mode(char *bf, size_t size, |
|
struct syscall_arg *arg) |
|
{ |
|
bool show_prefix = arg->show_string_prefix; |
|
const char *suffix = "_OK"; |
|
size_t printed = 0; |
|
int mode = arg->val; |
|
|
|
if (mode == F_OK) /* 0 */ |
|
return scnprintf(bf, size, "F%s", show_prefix ? suffix : ""); |
|
#define P_MODE(n) \ |
|
if (mode & n##_OK) { \ |
|
printed += scnprintf(bf + printed, size - printed, "%s%s", #n, show_prefix ? suffix : ""); \ |
|
mode &= ~n##_OK; \ |
|
} |
|
|
|
P_MODE(R); |
|
P_MODE(W); |
|
P_MODE(X); |
|
#undef P_MODE |
|
|
|
if (mode) |
|
printed += scnprintf(bf + printed, size - printed, "|%#x", mode); |
|
|
|
return printed; |
|
} |
|
|
|
#define SCA_ACCMODE syscall_arg__scnprintf_access_mode |
|
|
|
static size_t syscall_arg__scnprintf_filename(char *bf, size_t size, |
|
struct syscall_arg *arg); |
|
|
|
#define SCA_FILENAME syscall_arg__scnprintf_filename |
|
|
|
static size_t syscall_arg__scnprintf_pipe_flags(char *bf, size_t size, |
|
struct syscall_arg *arg) |
|
{ |
|
bool show_prefix = arg->show_string_prefix; |
|
const char *prefix = "O_"; |
|
int printed = 0, flags = arg->val; |
|
|
|
#define P_FLAG(n) \ |
|
if (flags & O_##n) { \ |
|
printed += scnprintf(bf + printed, size - printed, "%s%s%s", printed ? "|" : "", show_prefix ? prefix : "", #n); \ |
|
flags &= ~O_##n; \ |
|
} |
|
|
|
P_FLAG(CLOEXEC); |
|
P_FLAG(NONBLOCK); |
|
#undef P_FLAG |
|
|
|
if (flags) |
|
printed += scnprintf(bf + printed, size - printed, "%s%#x", printed ? "|" : "", flags); |
|
|
|
return printed; |
|
} |
|
|
|
#define SCA_PIPE_FLAGS syscall_arg__scnprintf_pipe_flags |
|
|
|
#ifndef GRND_NONBLOCK |
|
#define GRND_NONBLOCK 0x0001 |
|
#endif |
|
#ifndef GRND_RANDOM |
|
#define GRND_RANDOM 0x0002 |
|
#endif |
|
|
|
static size_t syscall_arg__scnprintf_getrandom_flags(char *bf, size_t size, |
|
struct syscall_arg *arg) |
|
{ |
|
bool show_prefix = arg->show_string_prefix; |
|
const char *prefix = "GRND_"; |
|
int printed = 0, flags = arg->val; |
|
|
|
#define P_FLAG(n) \ |
|
if (flags & GRND_##n) { \ |
|
printed += scnprintf(bf + printed, size - printed, "%s%s%s", printed ? "|" : "", show_prefix ? prefix : "", #n); \ |
|
flags &= ~GRND_##n; \ |
|
} |
|
|
|
P_FLAG(RANDOM); |
|
P_FLAG(NONBLOCK); |
|
#undef P_FLAG |
|
|
|
if (flags) |
|
printed += scnprintf(bf + printed, size - printed, "%s%#x", printed ? "|" : "", flags); |
|
|
|
return printed; |
|
} |
|
|
|
#define SCA_GETRANDOM_FLAGS syscall_arg__scnprintf_getrandom_flags |
|
|
|
#define STRARRAY(name, array) \ |
|
{ .scnprintf = SCA_STRARRAY, \ |
|
.strtoul = STUL_STRARRAY, \ |
|
.parm = &strarray__##array, } |
|
|
|
#define STRARRAY_FLAGS(name, array) \ |
|
{ .scnprintf = SCA_STRARRAY_FLAGS, \ |
|
.strtoul = STUL_STRARRAY_FLAGS, \ |
|
.parm = &strarray__##array, } |
|
|
|
#include "trace/beauty/arch_errno_names.c" |
|
#include "trace/beauty/eventfd.c" |
|
#include "trace/beauty/futex_op.c" |
|
#include "trace/beauty/futex_val3.c" |
|
#include "trace/beauty/mmap.c" |
|
#include "trace/beauty/mode_t.c" |
|
#include "trace/beauty/msg_flags.c" |
|
#include "trace/beauty/open_flags.c" |
|
#include "trace/beauty/perf_event_open.c" |
|
#include "trace/beauty/pid.c" |
|
#include "trace/beauty/sched_policy.c" |
|
#include "trace/beauty/seccomp.c" |
|
#include "trace/beauty/signum.c" |
|
#include "trace/beauty/socket_type.c" |
|
#include "trace/beauty/waitid_options.c" |
|
|
|
static struct syscall_fmt syscall_fmts[] = { |
|
{ .name = "access", |
|
.arg = { [1] = { .scnprintf = SCA_ACCMODE, /* mode */ }, }, }, |
|
{ .name = "arch_prctl", |
|
.arg = { [0] = { .scnprintf = SCA_X86_ARCH_PRCTL_CODE, /* code */ }, |
|
[1] = { .scnprintf = SCA_PTR, /* arg2 */ }, }, }, |
|
{ .name = "bind", |
|
.arg = { [0] = { .scnprintf = SCA_INT, /* fd */ }, |
|
[1] = { .scnprintf = SCA_SOCKADDR, /* umyaddr */ }, |
|
[2] = { .scnprintf = SCA_INT, /* addrlen */ }, }, }, |
|
{ .name = "bpf", |
|
.arg = { [0] = STRARRAY(cmd, bpf_cmd), }, }, |
|
{ .name = "brk", .hexret = true, |
|
.arg = { [0] = { .scnprintf = SCA_PTR, /* brk */ }, }, }, |
|
{ .name = "clock_gettime", |
|
.arg = { [0] = STRARRAY(clk_id, clockid), }, }, |
|
{ .name = "clone", .errpid = true, .nr_args = 5, |
|
.arg = { [0] = { .name = "flags", .scnprintf = SCA_CLONE_FLAGS, }, |
|
[1] = { .name = "child_stack", .scnprintf = SCA_HEX, }, |
|
[2] = { .name = "parent_tidptr", .scnprintf = SCA_HEX, }, |
|
[3] = { .name = "child_tidptr", .scnprintf = SCA_HEX, }, |
|
[4] = { .name = "tls", .scnprintf = SCA_HEX, }, }, }, |
|
{ .name = "close", |
|
.arg = { [0] = { .scnprintf = SCA_CLOSE_FD, /* fd */ }, }, }, |
|
{ .name = "connect", |
|
.arg = { [0] = { .scnprintf = SCA_INT, /* fd */ }, |
|
[1] = { .scnprintf = SCA_SOCKADDR, /* servaddr */ }, |
|
[2] = { .scnprintf = SCA_INT, /* addrlen */ }, }, }, |
|
{ .name = "epoll_ctl", |
|
.arg = { [1] = STRARRAY(op, epoll_ctl_ops), }, }, |
|
{ .name = "eventfd2", |
|
.arg = { [1] = { .scnprintf = SCA_EFD_FLAGS, /* flags */ }, }, }, |
|
{ .name = "fchmodat", |
|
.arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, }, |
|
{ .name = "fchownat", |
|
.arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, }, |
|
{ .name = "fcntl", |
|
.arg = { [1] = { .scnprintf = SCA_FCNTL_CMD, /* cmd */ |
|
.strtoul = STUL_STRARRAYS, |
|
.parm = &strarrays__fcntl_cmds_arrays, |
|
.show_zero = true, }, |
|
[2] = { .scnprintf = SCA_FCNTL_ARG, /* arg */ }, }, }, |
|
{ .name = "flock", |
|
.arg = { [1] = { .scnprintf = SCA_FLOCK, /* cmd */ }, }, }, |
|
{ .name = "fsconfig", |
|
.arg = { [1] = STRARRAY(cmd, fsconfig_cmds), }, }, |
|
{ .name = "fsmount", |
|
.arg = { [1] = STRARRAY_FLAGS(flags, fsmount_flags), |
|
[2] = { .scnprintf = SCA_FSMOUNT_ATTR_FLAGS, /* attr_flags */ }, }, }, |
|
{ .name = "fspick", |
|
.arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, |
|
[1] = { .scnprintf = SCA_FILENAME, /* path */ }, |
|
[2] = { .scnprintf = SCA_FSPICK_FLAGS, /* flags */ }, }, }, |
|
{ .name = "fstat", .alias = "newfstat", }, |
|
{ .name = "fstatat", .alias = "newfstatat", }, |
|
{ .name = "futex", |
|
.arg = { [1] = { .scnprintf = SCA_FUTEX_OP, /* op */ }, |
|
[5] = { .scnprintf = SCA_FUTEX_VAL3, /* val3 */ }, }, }, |
|
{ .name = "futimesat", |
|
.arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, }, |
|
{ .name = "getitimer", |
|
.arg = { [0] = STRARRAY(which, itimers), }, }, |
|
{ .name = "getpid", .errpid = true, }, |
|
{ .name = "getpgid", .errpid = true, }, |
|
{ .name = "getppid", .errpid = true, }, |
|
{ .name = "getrandom", |
|
.arg = { [2] = { .scnprintf = SCA_GETRANDOM_FLAGS, /* flags */ }, }, }, |
|
{ .name = "getrlimit", |
|
.arg = { [0] = STRARRAY(resource, rlimit_resources), }, }, |
|
{ .name = "getsockopt", |
|
.arg = { [1] = STRARRAY(level, socket_level), }, }, |
|
{ .name = "gettid", .errpid = true, }, |
|
{ .name = "ioctl", |
|
.arg = { |
|
#if defined(__i386__) || defined(__x86_64__) |
|
/* |
|
* FIXME: Make this available to all arches. |
|
*/ |
|
[1] = { .scnprintf = SCA_IOCTL_CMD, /* cmd */ }, |
|
[2] = { .scnprintf = SCA_HEX, /* arg */ }, }, }, |
|
#else |
|
[2] = { .scnprintf = SCA_HEX, /* arg */ }, }, }, |
|
#endif |
|
{ .name = "kcmp", .nr_args = 5, |
|
.arg = { [0] = { .name = "pid1", .scnprintf = SCA_PID, }, |
|
[1] = { .name = "pid2", .scnprintf = SCA_PID, }, |
|
[2] = { .name = "type", .scnprintf = SCA_KCMP_TYPE, }, |
|
[3] = { .name = "idx1", .scnprintf = SCA_KCMP_IDX, }, |
|
[4] = { .name = "idx2", .scnprintf = SCA_KCMP_IDX, }, }, }, |
|
{ .name = "keyctl", |
|
.arg = { [0] = STRARRAY(option, keyctl_options), }, }, |
|
{ .name = "kill", |
|
.arg = { [1] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, }, |
|
{ .name = "linkat", |
|
.arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, }, |
|
{ .name = "lseek", |
|
.arg = { [2] = STRARRAY(whence, whences), }, }, |
|
{ .name = "lstat", .alias = "newlstat", }, |
|
{ .name = "madvise", |
|
.arg = { [0] = { .scnprintf = SCA_HEX, /* start */ }, |
|
[2] = { .scnprintf = SCA_MADV_BHV, /* behavior */ }, }, }, |
|
{ .name = "mkdirat", |
|
.arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, }, |
|
{ .name = "mknodat", |
|
.arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, }, |
|
{ .name = "mmap", .hexret = true, |
|
/* The standard mmap maps to old_mmap on s390x */ |
|
#if defined(__s390x__) |
|
.alias = "old_mmap", |
|
#endif |
|
.arg = { [2] = { .scnprintf = SCA_MMAP_PROT, /* prot */ }, |
|
[3] = { .scnprintf = SCA_MMAP_FLAGS, /* flags */ |
|
.strtoul = STUL_STRARRAY_FLAGS, |
|
.parm = &strarray__mmap_flags, }, |
|
[5] = { .scnprintf = SCA_HEX, /* offset */ }, }, }, |
|
{ .name = "mount", |
|
.arg = { [0] = { .scnprintf = SCA_FILENAME, /* dev_name */ }, |
|
[3] = { .scnprintf = SCA_MOUNT_FLAGS, /* flags */ |
|
.mask_val = SCAMV_MOUNT_FLAGS, /* flags */ }, }, }, |
|
{ .name = "move_mount", |
|
.arg = { [0] = { .scnprintf = SCA_FDAT, /* from_dfd */ }, |
|
[1] = { .scnprintf = SCA_FILENAME, /* from_pathname */ }, |
|
[2] = { .scnprintf = SCA_FDAT, /* to_dfd */ }, |
|
[3] = { .scnprintf = SCA_FILENAME, /* to_pathname */ }, |
|
[4] = { .scnprintf = SCA_MOVE_MOUNT_FLAGS, /* flags */ }, }, }, |
|
{ .name = "mprotect", |
|
.arg = { [0] = { .scnprintf = SCA_HEX, /* start */ }, |
|
[2] = { .scnprintf = SCA_MMAP_PROT, /* prot */ }, }, }, |
|
{ .name = "mq_unlink", |
|
.arg = { [0] = { .scnprintf = SCA_FILENAME, /* u_name */ }, }, }, |
|
{ .name = "mremap", .hexret = true, |
|
.arg = { [3] = { .scnprintf = SCA_MREMAP_FLAGS, /* flags */ }, }, }, |
|
{ .name = "name_to_handle_at", |
|
.arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, }, |
|
{ .name = "newfstatat", |
|
.arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, }, |
|
{ .name = "open", |
|
.arg = { [1] = { .scnprintf = SCA_OPEN_FLAGS, /* flags */ }, }, }, |
|
{ .name = "open_by_handle_at", |
|
.arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, |
|
[2] = { .scnprintf = SCA_OPEN_FLAGS, /* flags */ }, }, }, |
|
{ .name = "openat", |
|
.arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, |
|
[2] = { .scnprintf = SCA_OPEN_FLAGS, /* flags */ }, }, }, |
|
{ .name = "perf_event_open", |
|
.arg = { [2] = { .scnprintf = SCA_INT, /* cpu */ }, |
|
[3] = { .scnprintf = SCA_FD, /* group_fd */ }, |
|
[4] = { .scnprintf = SCA_PERF_FLAGS, /* flags */ }, }, }, |
|
{ .name = "pipe2", |
|
.arg = { [1] = { .scnprintf = SCA_PIPE_FLAGS, /* flags */ }, }, }, |
|
{ .name = "pkey_alloc", |
|
.arg = { [1] = { .scnprintf = SCA_PKEY_ALLOC_ACCESS_RIGHTS, /* access_rights */ }, }, }, |
|
{ .name = "pkey_free", |
|
.arg = { [0] = { .scnprintf = SCA_INT, /* key */ }, }, }, |
|
{ .name = "pkey_mprotect", |
|
.arg = { [0] = { .scnprintf = SCA_HEX, /* start */ }, |
|
[2] = { .scnprintf = SCA_MMAP_PROT, /* prot */ }, |
|
[3] = { .scnprintf = SCA_INT, /* pkey */ }, }, }, |
|
{ .name = "poll", .timeout = true, }, |
|
{ .name = "ppoll", .timeout = true, }, |
|
{ .name = "prctl", |
|
.arg = { [0] = { .scnprintf = SCA_PRCTL_OPTION, /* option */ |
|
.strtoul = STUL_STRARRAY, |
|
.parm = &strarray__prctl_options, }, |
|
[1] = { .scnprintf = SCA_PRCTL_ARG2, /* arg2 */ }, |
|
[2] = { .scnprintf = SCA_PRCTL_ARG3, /* arg3 */ }, }, }, |
|
{ .name = "pread", .alias = "pread64", }, |
|
{ .name = "preadv", .alias = "pread", }, |
|
{ .name = "prlimit64", |
|
.arg = { [1] = STRARRAY(resource, rlimit_resources), }, }, |
|
{ .name = "pwrite", .alias = "pwrite64", }, |
|
{ .name = "readlinkat", |
|
.arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, }, |
|
{ .name = "recvfrom", |
|
.arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, }, |
|
{ .name = "recvmmsg", |
|
.arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, }, |
|
{ .name = "recvmsg", |
|
.arg = { [2] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, }, |
|
{ .name = "renameat", |
|
.arg = { [0] = { .scnprintf = SCA_FDAT, /* olddirfd */ }, |
|
[2] = { .scnprintf = SCA_FDAT, /* newdirfd */ }, }, }, |
|
{ .name = "renameat2", |
|
.arg = { [0] = { .scnprintf = SCA_FDAT, /* olddirfd */ }, |
|
[2] = { .scnprintf = SCA_FDAT, /* newdirfd */ }, |
|
[4] = { .scnprintf = SCA_RENAMEAT2_FLAGS, /* flags */ }, }, }, |
|
{ .name = "rt_sigaction", |
|
.arg = { [0] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, }, |
|
{ .name = "rt_sigprocmask", |
|
.arg = { [0] = STRARRAY(how, sighow), }, }, |
|
{ .name = "rt_sigqueueinfo", |
|
.arg = { [1] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, }, |
|
{ .name = "rt_tgsigqueueinfo", |
|
.arg = { [2] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, }, |
|
{ .name = "sched_setscheduler", |
|
.arg = { [1] = { .scnprintf = SCA_SCHED_POLICY, /* policy */ }, }, }, |
|
{ .name = "seccomp", |
|
.arg = { [0] = { .scnprintf = SCA_SECCOMP_OP, /* op */ }, |
|
[1] = { .scnprintf = SCA_SECCOMP_FLAGS, /* flags */ }, }, }, |
|
{ .name = "select", .timeout = true, }, |
|
{ .name = "sendfile", .alias = "sendfile64", }, |
|
{ .name = "sendmmsg", |
|
.arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, }, |
|
{ .name = "sendmsg", |
|
.arg = { [2] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, }, |
|
{ .name = "sendto", |
|
.arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, |
|
[4] = { .scnprintf = SCA_SOCKADDR, /* addr */ }, }, }, |
|
{ .name = "set_tid_address", .errpid = true, }, |
|
{ .name = "setitimer", |
|
.arg = { [0] = STRARRAY(which, itimers), }, }, |
|
{ .name = "setrlimit", |
|
.arg = { [0] = STRARRAY(resource, rlimit_resources), }, }, |
|
{ .name = "setsockopt", |
|
.arg = { [1] = STRARRAY(level, socket_level), }, }, |
|
{ .name = "socket", |
|
.arg = { [0] = STRARRAY(family, socket_families), |
|
[1] = { .scnprintf = SCA_SK_TYPE, /* type */ }, |
|
[2] = { .scnprintf = SCA_SK_PROTO, /* protocol */ }, }, }, |
|
{ .name = "socketpair", |
|
.arg = { [0] = STRARRAY(family, socket_families), |
|
[1] = { .scnprintf = SCA_SK_TYPE, /* type */ }, |
|
[2] = { .scnprintf = SCA_SK_PROTO, /* protocol */ }, }, }, |
|
{ .name = "stat", .alias = "newstat", }, |
|
{ .name = "statx", |
|
.arg = { [0] = { .scnprintf = SCA_FDAT, /* fdat */ }, |
|
[2] = { .scnprintf = SCA_STATX_FLAGS, /* flags */ } , |
|
[3] = { .scnprintf = SCA_STATX_MASK, /* mask */ }, }, }, |
|
{ .name = "swapoff", |
|
.arg = { [0] = { .scnprintf = SCA_FILENAME, /* specialfile */ }, }, }, |
|
{ .name = "swapon", |
|
.arg = { [0] = { .scnprintf = SCA_FILENAME, /* specialfile */ }, }, }, |
|
{ .name = "symlinkat", |
|
.arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, }, |
|
{ .name = "sync_file_range", |
|
.arg = { [3] = { .scnprintf = SCA_SYNC_FILE_RANGE_FLAGS, /* flags */ }, }, }, |
|
{ .name = "tgkill", |
|
.arg = { [2] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, }, |
|
{ .name = "tkill", |
|
.arg = { [1] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, }, |
|
{ .name = "umount2", .alias = "umount", |
|
.arg = { [0] = { .scnprintf = SCA_FILENAME, /* name */ }, }, }, |
|
{ .name = "uname", .alias = "newuname", }, |
|
{ .name = "unlinkat", |
|
.arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, }, |
|
{ .name = "utimensat", |
|
.arg = { [0] = { .scnprintf = SCA_FDAT, /* dirfd */ }, }, }, |
|
{ .name = "wait4", .errpid = true, |
|
.arg = { [2] = { .scnprintf = SCA_WAITID_OPTIONS, /* options */ }, }, }, |
|
{ .name = "waitid", .errpid = true, |
|
.arg = { [3] = { .scnprintf = SCA_WAITID_OPTIONS, /* options */ }, }, }, |
|
}; |
|
|
|
static int syscall_fmt__cmp(const void *name, const void *fmtp) |
|
{ |
|
const struct syscall_fmt *fmt = fmtp; |
|
return strcmp(name, fmt->name); |
|
} |
|
|
|
static struct syscall_fmt *__syscall_fmt__find(struct syscall_fmt *fmts, const int nmemb, const char *name) |
|
{ |
|
return bsearch(name, fmts, nmemb, sizeof(struct syscall_fmt), syscall_fmt__cmp); |
|
} |
|
|
|
static struct syscall_fmt *syscall_fmt__find(const char *name) |
|
{ |
|
const int nmemb = ARRAY_SIZE(syscall_fmts); |
|
return __syscall_fmt__find(syscall_fmts, nmemb, name); |
|
} |
|
|
|
static struct syscall_fmt *__syscall_fmt__find_by_alias(struct syscall_fmt *fmts, const int nmemb, const char *alias) |
|
{ |
|
int i; |
|
|
|
for (i = 0; i < nmemb; ++i) { |
|
if (fmts[i].alias && strcmp(fmts[i].alias, alias) == 0) |
|
return &fmts[i]; |
|
} |
|
|
|
return NULL; |
|
} |
|
|
|
static struct syscall_fmt *syscall_fmt__find_by_alias(const char *alias) |
|
{ |
|
const int nmemb = ARRAY_SIZE(syscall_fmts); |
|
return __syscall_fmt__find_by_alias(syscall_fmts, nmemb, alias); |
|
} |
|
|
|
/* |
|
* is_exit: is this "exit" or "exit_group"? |
|
* is_open: is this "open" or "openat"? To associate the fd returned in sys_exit with the pathname in sys_enter. |
|
* args_size: sum of the sizes of the syscall arguments, anything after that is augmented stuff: pathname for openat, etc. |
|
* nonexistent: Just a hole in the syscall table, syscall id not allocated |
|
*/ |
|
struct syscall { |
|
struct tep_event *tp_format; |
|
int nr_args; |
|
int args_size; |
|
struct { |
|
struct bpf_program *sys_enter, |
|
*sys_exit; |
|
} bpf_prog; |
|
bool is_exit; |
|
bool is_open; |
|
bool nonexistent; |
|
struct tep_format_field *args; |
|
const char *name; |
|
struct syscall_fmt *fmt; |
|
struct syscall_arg_fmt *arg_fmt; |
|
}; |
|
|
|
/* |
|
* Must match what is in the BPF program: |
|
* |
|
* tools/perf/examples/bpf/augmented_raw_syscalls.c |
|
*/ |
|
struct bpf_map_syscall_entry { |
|
bool enabled; |
|
u16 string_args_len[6]; |
|
}; |
|
|
|
/* |
|
* We need to have this 'calculated' boolean because in some cases we really |
|
* don't know what is the duration of a syscall, for instance, when we start |
|
* a session and some threads are waiting for a syscall to finish, say 'poll', |
|
* in which case all we can do is to print "( ? ) for duration and for the |
|
* start timestamp. |
|
*/ |
|
static size_t fprintf_duration(unsigned long t, bool calculated, FILE *fp) |
|
{ |
|
double duration = (double)t / NSEC_PER_MSEC; |
|
size_t printed = fprintf(fp, "("); |
|
|
|
if (!calculated) |
|
printed += fprintf(fp, " "); |
|
else if (duration >= 1.0) |
|
printed += color_fprintf(fp, PERF_COLOR_RED, "%6.3f ms", duration); |
|
else if (duration >= 0.01) |
|
printed += color_fprintf(fp, PERF_COLOR_YELLOW, "%6.3f ms", duration); |
|
else |
|
printed += color_fprintf(fp, PERF_COLOR_NORMAL, "%6.3f ms", duration); |
|
return printed + fprintf(fp, "): "); |
|
} |
|
|
|
/** |
|
* filename.ptr: The filename char pointer that will be vfs_getname'd |
|
* filename.entry_str_pos: Where to insert the string translated from |
|
* filename.ptr by the vfs_getname tracepoint/kprobe. |
|
* ret_scnprintf: syscall args may set this to a different syscall return |
|
* formatter, for instance, fcntl may return fds, file flags, etc. |
|
*/ |
|
struct thread_trace { |
|
u64 entry_time; |
|
bool entry_pending; |
|
unsigned long nr_events; |
|
unsigned long pfmaj, pfmin; |
|
char *entry_str; |
|
double runtime_ms; |
|
size_t (*ret_scnprintf)(char *bf, size_t size, struct syscall_arg *arg); |
|
struct { |
|
unsigned long ptr; |
|
short int entry_str_pos; |
|
bool pending_open; |
|
unsigned int namelen; |
|
char *name; |
|
} filename; |
|
struct { |
|
int max; |
|
struct file *table; |
|
} files; |
|
|
|
struct intlist *syscall_stats; |
|
}; |
|
|
|
static struct thread_trace *thread_trace__new(void) |
|
{ |
|
struct thread_trace *ttrace = zalloc(sizeof(struct thread_trace)); |
|
|
|
if (ttrace) { |
|
ttrace->files.max = -1; |
|
ttrace->syscall_stats = intlist__new(NULL); |
|
} |
|
|
|
return ttrace; |
|
} |
|
|
|
static struct thread_trace *thread__trace(struct thread *thread, FILE *fp) |
|
{ |
|
struct thread_trace *ttrace; |
|
|
|
if (thread == NULL) |
|
goto fail; |
|
|
|
if (thread__priv(thread) == NULL) |
|
thread__set_priv(thread, thread_trace__new()); |
|
|
|
if (thread__priv(thread) == NULL) |
|
goto fail; |
|
|
|
ttrace = thread__priv(thread); |
|
++ttrace->nr_events; |
|
|
|
return ttrace; |
|
fail: |
|
color_fprintf(fp, PERF_COLOR_RED, |
|
"WARNING: not enough memory, dropping samples!\n"); |
|
return NULL; |
|
} |
|
|
|
|
|
void syscall_arg__set_ret_scnprintf(struct syscall_arg *arg, |
|
size_t (*ret_scnprintf)(char *bf, size_t size, struct syscall_arg *arg)) |
|
{ |
|
struct thread_trace *ttrace = thread__priv(arg->thread); |
|
|
|
ttrace->ret_scnprintf = ret_scnprintf; |
|
} |
|
|
|
#define TRACE_PFMAJ (1 << 0) |
|
#define TRACE_PFMIN (1 << 1) |
|
|
|
static const size_t trace__entry_str_size = 2048; |
|
|
|
static struct file *thread_trace__files_entry(struct thread_trace *ttrace, int fd) |
|
{ |
|
if (fd < 0) |
|
return NULL; |
|
|
|
if (fd > ttrace->files.max) { |
|
struct file *nfiles = realloc(ttrace->files.table, (fd + 1) * sizeof(struct file)); |
|
|
|
if (nfiles == NULL) |
|
return NULL; |
|
|
|
if (ttrace->files.max != -1) { |
|
memset(nfiles + ttrace->files.max + 1, 0, |
|
(fd - ttrace->files.max) * sizeof(struct file)); |
|
} else { |
|
memset(nfiles, 0, (fd + 1) * sizeof(struct file)); |
|
} |
|
|
|
ttrace->files.table = nfiles; |
|
ttrace->files.max = fd; |
|
} |
|
|
|
return ttrace->files.table + fd; |
|
} |
|
|
|
struct file *thread__files_entry(struct thread *thread, int fd) |
|
{ |
|
return thread_trace__files_entry(thread__priv(thread), fd); |
|
} |
|
|
|
static int trace__set_fd_pathname(struct thread *thread, int fd, const char *pathname) |
|
{ |
|
struct thread_trace *ttrace = thread__priv(thread); |
|
struct file *file = thread_trace__files_entry(ttrace, fd); |
|
|
|
if (file != NULL) { |
|
struct stat st; |
|
if (stat(pathname, &st) == 0) |
|
file->dev_maj = major(st.st_rdev); |
|
file->pathname = strdup(pathname); |
|
if (file->pathname) |
|
return 0; |
|
} |
|
|
|
return -1; |
|
} |
|
|
|
static int thread__read_fd_path(struct thread *thread, int fd) |
|
{ |
|
char linkname[PATH_MAX], pathname[PATH_MAX]; |
|
struct stat st; |
|
int ret; |
|
|
|
if (thread->pid_ == thread->tid) { |
|
scnprintf(linkname, sizeof(linkname), |
|
"/proc/%d/fd/%d", thread->pid_, fd); |
|
} else { |
|
scnprintf(linkname, sizeof(linkname), |
|
"/proc/%d/task/%d/fd/%d", thread->pid_, thread->tid, fd); |
|
} |
|
|
|
if (lstat(linkname, &st) < 0 || st.st_size + 1 > (off_t)sizeof(pathname)) |
|
return -1; |
|
|
|
ret = readlink(linkname, pathname, sizeof(pathname)); |
|
|
|
if (ret < 0 || ret > st.st_size) |
|
return -1; |
|
|
|
pathname[ret] = '\0'; |
|
return trace__set_fd_pathname(thread, fd, pathname); |
|
} |
|
|
|
static const char *thread__fd_path(struct thread *thread, int fd, |
|
struct trace *trace) |
|
{ |
|
struct thread_trace *ttrace = thread__priv(thread); |
|
|
|
if (ttrace == NULL || trace->fd_path_disabled) |
|
return NULL; |
|
|
|
if (fd < 0) |
|
return NULL; |
|
|
|
if ((fd > ttrace->files.max || ttrace->files.table[fd].pathname == NULL)) { |
|
if (!trace->live) |
|
return NULL; |
|
++trace->stats.proc_getname; |
|
if (thread__read_fd_path(thread, fd)) |
|
return NULL; |
|
} |
|
|
|
return ttrace->files.table[fd].pathname; |
|
} |
|
|
|
size_t syscall_arg__scnprintf_fd(char *bf, size_t size, struct syscall_arg *arg) |
|
{ |
|
int fd = arg->val; |
|
size_t printed = scnprintf(bf, size, "%d", fd); |
|
const char *path = thread__fd_path(arg->thread, fd, arg->trace); |
|
|
|
if (path) |
|
printed += scnprintf(bf + printed, size - printed, "<%s>", path); |
|
|
|
return printed; |
|
} |
|
|
|
size_t pid__scnprintf_fd(struct trace *trace, pid_t pid, int fd, char *bf, size_t size) |
|
{ |
|
size_t printed = scnprintf(bf, size, "%d", fd); |
|
struct thread *thread = machine__find_thread(trace->host, pid, pid); |
|
|
|
if (thread) { |
|
const char *path = thread__fd_path(thread, fd, trace); |
|
|
|
if (path) |
|
printed += scnprintf(bf + printed, size - printed, "<%s>", path); |
|
|
|
thread__put(thread); |
|
} |
|
|
|
return printed; |
|
} |
|
|
|
static size_t syscall_arg__scnprintf_close_fd(char *bf, size_t size, |
|
struct syscall_arg *arg) |
|
{ |
|
int fd = arg->val; |
|
size_t printed = syscall_arg__scnprintf_fd(bf, size, arg); |
|
struct thread_trace *ttrace = thread__priv(arg->thread); |
|
|
|
if (ttrace && fd >= 0 && fd <= ttrace->files.max) |
|
zfree(&ttrace->files.table[fd].pathname); |
|
|
|
return printed; |
|
} |
|
|
|
static void thread__set_filename_pos(struct thread *thread, const char *bf, |
|
unsigned long ptr) |
|
{ |
|
struct thread_trace *ttrace = thread__priv(thread); |
|
|
|
ttrace->filename.ptr = ptr; |
|
ttrace->filename.entry_str_pos = bf - ttrace->entry_str; |
|
} |
|
|
|
static size_t syscall_arg__scnprintf_augmented_string(struct syscall_arg *arg, char *bf, size_t size) |
|
{ |
|
struct augmented_arg *augmented_arg = arg->augmented.args; |
|
size_t printed = scnprintf(bf, size, "\"%.*s\"", augmented_arg->size, augmented_arg->value); |
|
/* |
|
* So that the next arg with a payload can consume its augmented arg, i.e. for rename* syscalls |
|
* we would have two strings, each prefixed by its size. |
|
*/ |
|
int consumed = sizeof(*augmented_arg) + augmented_arg->size; |
|
|
|
arg->augmented.args = ((void *)arg->augmented.args) + consumed; |
|
arg->augmented.size -= consumed; |
|
|
|
return printed; |
|
} |
|
|
|
static size_t syscall_arg__scnprintf_filename(char *bf, size_t size, |
|
struct syscall_arg *arg) |
|
{ |
|
unsigned long ptr = arg->val; |
|
|
|
if (arg->augmented.args) |
|
return syscall_arg__scnprintf_augmented_string(arg, bf, size); |
|
|
|
if (!arg->trace->vfs_getname) |
|
return scnprintf(bf, size, "%#x", ptr); |
|
|
|
thread__set_filename_pos(arg->thread, bf, ptr); |
|
return 0; |
|
} |
|
|
|
static bool trace__filter_duration(struct trace *trace, double t) |
|
{ |
|
return t < (trace->duration_filter * NSEC_PER_MSEC); |
|
} |
|
|
|
static size_t __trace__fprintf_tstamp(struct trace *trace, u64 tstamp, FILE *fp) |
|
{ |
|
double ts = (double)(tstamp - trace->base_time) / NSEC_PER_MSEC; |
|
|
|
return fprintf(fp, "%10.3f ", ts); |
|
} |
|
|
|
/* |
|
* We're handling tstamp=0 as an undefined tstamp, i.e. like when we are |
|
* using ttrace->entry_time for a thread that receives a sys_exit without |
|
* first having received a sys_enter ("poll" issued before tracing session |
|
* starts, lost sys_enter exit due to ring buffer overflow). |
|
*/ |
|
static size_t trace__fprintf_tstamp(struct trace *trace, u64 tstamp, FILE *fp) |
|
{ |
|
if (tstamp > 0) |
|
return __trace__fprintf_tstamp(trace, tstamp, fp); |
|
|
|
return fprintf(fp, " ? "); |
|
} |
|
|
|
static pid_t workload_pid = -1; |
|
static bool done = false; |
|
static bool interrupted = false; |
|
|
|
static void sighandler_interrupt(int sig __maybe_unused) |
|
{ |
|
done = interrupted = true; |
|
} |
|
|
|
static void sighandler_chld(int sig __maybe_unused, siginfo_t *info, |
|
void *context __maybe_unused) |
|
{ |
|
if (info->si_pid == workload_pid) |
|
done = true; |
|
} |
|
|
|
static size_t trace__fprintf_comm_tid(struct trace *trace, struct thread *thread, FILE *fp) |
|
{ |
|
size_t printed = 0; |
|
|
|
if (trace->multiple_threads) { |
|
if (trace->show_comm) |
|
printed += fprintf(fp, "%.14s/", thread__comm_str(thread)); |
|
printed += fprintf(fp, "%d ", thread->tid); |
|
} |
|
|
|
return printed; |
|
} |
|
|
|
static size_t trace__fprintf_entry_head(struct trace *trace, struct thread *thread, |
|
u64 duration, bool duration_calculated, u64 tstamp, FILE *fp) |
|
{ |
|
size_t printed = 0; |
|
|
|
if (trace->show_tstamp) |
|
printed = trace__fprintf_tstamp(trace, tstamp, fp); |
|
if (trace->show_duration) |
|
printed += fprintf_duration(duration, duration_calculated, fp); |
|
return printed + trace__fprintf_comm_tid(trace, thread, fp); |
|
} |
|
|
|
static int trace__process_event(struct trace *trace, struct machine *machine, |
|
union perf_event *event, struct perf_sample *sample) |
|
{ |
|
int ret = 0; |
|
|
|
switch (event->header.type) { |
|
case PERF_RECORD_LOST: |
|
color_fprintf(trace->output, PERF_COLOR_RED, |
|
"LOST %" PRIu64 " events!\n", event->lost.lost); |
|
ret = machine__process_lost_event(machine, event, sample); |
|
break; |
|
default: |
|
ret = machine__process_event(machine, event, sample); |
|
break; |
|
} |
|
|
|
return ret; |
|
} |
|
|
|
static int trace__tool_process(struct perf_tool *tool, |
|
union perf_event *event, |
|
struct perf_sample *sample, |
|
struct machine *machine) |
|
{ |
|
struct trace *trace = container_of(tool, struct trace, tool); |
|
return trace__process_event(trace, machine, event, sample); |
|
} |
|
|
|
static char *trace__machine__resolve_kernel_addr(void *vmachine, unsigned long long *addrp, char **modp) |
|
{ |
|
struct machine *machine = vmachine; |
|
|
|
if (machine->kptr_restrict_warned) |
|
return NULL; |
|
|
|
if (symbol_conf.kptr_restrict) { |
|
pr_warning("Kernel address maps (/proc/{kallsyms,modules}) are restricted.\n\n" |
|
"Check /proc/sys/kernel/kptr_restrict and /proc/sys/kernel/perf_event_paranoid.\n\n" |
|
"Kernel samples will not be resolved.\n"); |
|
machine->kptr_restrict_warned = true; |
|
return NULL; |
|
} |
|
|
|
return machine__resolve_kernel_addr(vmachine, addrp, modp); |
|
} |
|
|
|
static int trace__symbols_init(struct trace *trace, struct evlist *evlist) |
|
{ |
|
int err = symbol__init(NULL); |
|
|
|
if (err) |
|
return err; |
|
|
|
trace->host = machine__new_host(); |
|
if (trace->host == NULL) |
|
return -ENOMEM; |
|
|
|
err = trace_event__register_resolver(trace->host, trace__machine__resolve_kernel_addr); |
|
if (err < 0) |
|
goto out; |
|
|
|
err = __machine__synthesize_threads(trace->host, &trace->tool, &trace->opts.target, |
|
evlist->core.threads, trace__tool_process, |
|
true, false, 1); |
|
out: |
|
if (err) |
|
symbol__exit(); |
|
|
|
return err; |
|
} |
|
|
|
static void trace__symbols__exit(struct trace *trace) |
|
{ |
|
machine__exit(trace->host); |
|
trace->host = NULL; |
|
|
|
symbol__exit(); |
|
} |
|
|
|
static int syscall__alloc_arg_fmts(struct syscall *sc, int nr_args) |
|
{ |
|
int idx; |
|
|
|
if (nr_args == 6 && sc->fmt && sc->fmt->nr_args != 0) |
|
nr_args = sc->fmt->nr_args; |
|
|
|
sc->arg_fmt = calloc(nr_args, sizeof(*sc->arg_fmt)); |
|
if (sc->arg_fmt == NULL) |
|
return -1; |
|
|
|
for (idx = 0; idx < nr_args; ++idx) { |
|
if (sc->fmt) |
|
sc->arg_fmt[idx] = sc->fmt->arg[idx]; |
|
} |
|
|
|
sc->nr_args = nr_args; |
|
return 0; |
|
} |
|
|
|
static struct syscall_arg_fmt syscall_arg_fmts__by_name[] = { |
|
{ .name = "msr", .scnprintf = SCA_X86_MSR, .strtoul = STUL_X86_MSR, }, |
|
{ .name = "vector", .scnprintf = SCA_X86_IRQ_VECTORS, .strtoul = STUL_X86_IRQ_VECTORS, }, |
|
}; |
|
|
|
static int syscall_arg_fmt__cmp(const void *name, const void *fmtp) |
|
{ |
|
const struct syscall_arg_fmt *fmt = fmtp; |
|
return strcmp(name, fmt->name); |
|
} |
|
|
|
static struct syscall_arg_fmt * |
|
__syscall_arg_fmt__find_by_name(struct syscall_arg_fmt *fmts, const int nmemb, const char *name) |
|
{ |
|
return bsearch(name, fmts, nmemb, sizeof(struct syscall_arg_fmt), syscall_arg_fmt__cmp); |
|
} |
|
|
|
static struct syscall_arg_fmt *syscall_arg_fmt__find_by_name(const char *name) |
|
{ |
|
const int nmemb = ARRAY_SIZE(syscall_arg_fmts__by_name); |
|
return __syscall_arg_fmt__find_by_name(syscall_arg_fmts__by_name, nmemb, name); |
|
} |
|
|
|
static struct tep_format_field * |
|
syscall_arg_fmt__init_array(struct syscall_arg_fmt *arg, struct tep_format_field *field) |
|
{ |
|
struct tep_format_field *last_field = NULL; |
|
int len; |
|
|
|
for (; field; field = field->next, ++arg) { |
|
last_field = field; |
|
|
|
if (arg->scnprintf) |
|
continue; |
|
|
|
len = strlen(field->name); |
|
|
|
if (strcmp(field->type, "const char *") == 0 && |
|
((len >= 4 && strcmp(field->name + len - 4, "name") == 0) || |
|
strstr(field->name, "path") != NULL)) |
|
arg->scnprintf = SCA_FILENAME; |
|
else if ((field->flags & TEP_FIELD_IS_POINTER) || strstr(field->name, "addr")) |
|
arg->scnprintf = SCA_PTR; |
|
else if (strcmp(field->type, "pid_t") == 0) |
|
arg->scnprintf = SCA_PID; |
|
else if (strcmp(field->type, "umode_t") == 0) |
|
arg->scnprintf = SCA_MODE_T; |
|
else if ((field->flags & TEP_FIELD_IS_ARRAY) && strstr(field->type, "char")) { |
|
arg->scnprintf = SCA_CHAR_ARRAY; |
|
arg->nr_entries = field->arraylen; |
|
} else if ((strcmp(field->type, "int") == 0 || |
|
strcmp(field->type, "unsigned int") == 0 || |
|
strcmp(field->type, "long") == 0) && |
|
len >= 2 && strcmp(field->name + len - 2, "fd") == 0) { |
|
/* |
|
* /sys/kernel/tracing/events/syscalls/sys_enter* |
|
* egrep 'field:.*fd;' .../format|sed -r 's/.*field:([a-z ]+) [a-z_]*fd.+/\1/g'|sort|uniq -c |
|
* 65 int |
|
* 23 unsigned int |
|
* 7 unsigned long |
|
*/ |
|
arg->scnprintf = SCA_FD; |
|
} else { |
|
struct syscall_arg_fmt *fmt = syscall_arg_fmt__find_by_name(field->name); |
|
|
|
if (fmt) { |
|
arg->scnprintf = fmt->scnprintf; |
|
arg->strtoul = fmt->strtoul; |
|
} |
|
} |
|
} |
|
|
|
return last_field; |
|
} |
|
|
|
static int syscall__set_arg_fmts(struct syscall *sc) |
|
{ |
|
struct tep_format_field *last_field = syscall_arg_fmt__init_array(sc->arg_fmt, sc->args); |
|
|
|
if (last_field) |
|
sc->args_size = last_field->offset + last_field->size; |
|
|
|
return 0; |
|
} |
|
|
|
static int trace__read_syscall_info(struct trace *trace, int id) |
|
{ |
|
char tp_name[128]; |
|
struct syscall *sc; |
|
const char *name = syscalltbl__name(trace->sctbl, id); |
|
|
|
#ifdef HAVE_SYSCALL_TABLE_SUPPORT |
|
if (trace->syscalls.table == NULL) { |
|
trace->syscalls.table = calloc(trace->sctbl->syscalls.max_id + 1, sizeof(*sc)); |
|
if (trace->syscalls.table == NULL) |
|
return -ENOMEM; |
|
} |
|
#else |
|
if (id > trace->sctbl->syscalls.max_id || (id == 0 && trace->syscalls.table == NULL)) { |
|
// When using libaudit we don't know beforehand what is the max syscall id |
|
struct syscall *table = realloc(trace->syscalls.table, (id + 1) * sizeof(*sc)); |
|
|
|
if (table == NULL) |
|
return -ENOMEM; |
|
|
|
// Need to memset from offset 0 and +1 members if brand new |
|
if (trace->syscalls.table == NULL) |
|
memset(table, 0, (id + 1) * sizeof(*sc)); |
|
else |
|
memset(table + trace->sctbl->syscalls.max_id + 1, 0, (id - trace->sctbl->syscalls.max_id) * sizeof(*sc)); |
|
|
|
trace->syscalls.table = table; |
|
trace->sctbl->syscalls.max_id = id; |
|
} |
|
#endif |
|
sc = trace->syscalls.table + id; |
|
if (sc->nonexistent) |
|
return 0; |
|
|
|
if (name == NULL) { |
|
sc->nonexistent = true; |
|
return 0; |
|
} |
|
|
|
sc->name = name; |
|
sc->fmt = syscall_fmt__find(sc->name); |
|
|
|
snprintf(tp_name, sizeof(tp_name), "sys_enter_%s", sc->name); |
|
sc->tp_format = trace_event__tp_format("syscalls", tp_name); |
|
|
|
if (IS_ERR(sc->tp_format) && sc->fmt && sc->fmt->alias) { |
|
snprintf(tp_name, sizeof(tp_name), "sys_enter_%s", sc->fmt->alias); |
|
sc->tp_format = trace_event__tp_format("syscalls", tp_name); |
|
} |
|
|
|
if (syscall__alloc_arg_fmts(sc, IS_ERR(sc->tp_format) ? 6 : sc->tp_format->format.nr_fields)) |
|
return -ENOMEM; |
|
|
|
if (IS_ERR(sc->tp_format)) |
|
return PTR_ERR(sc->tp_format); |
|
|
|
sc->args = sc->tp_format->format.fields; |
|
/* |
|
* We need to check and discard the first variable '__syscall_nr' |
|
* or 'nr' that mean the syscall number. It is needless here. |
|
* So drop '__syscall_nr' or 'nr' field but does not exist on older kernels. |
|
*/ |
|
if (sc->args && (!strcmp(sc->args->name, "__syscall_nr") || !strcmp(sc->args->name, "nr"))) { |
|
sc->args = sc->args->next; |
|
--sc->nr_args; |
|
} |
|
|
|
sc->is_exit = !strcmp(name, "exit_group") || !strcmp(name, "exit"); |
|
sc->is_open = !strcmp(name, "open") || !strcmp(name, "openat"); |
|
|
|
return syscall__set_arg_fmts(sc); |
|
} |
|
|
|
static int evsel__init_tp_arg_scnprintf(struct evsel *evsel) |
|
{ |
|
struct syscall_arg_fmt *fmt = evsel__syscall_arg_fmt(evsel); |
|
|
|
if (fmt != NULL) { |
|
syscall_arg_fmt__init_array(fmt, evsel->tp_format->format.fields); |
|
return 0; |
|
} |
|
|
|
return -ENOMEM; |
|
} |
|
|
|
static int intcmp(const void *a, const void *b) |
|
{ |
|
const int *one = a, *another = b; |
|
|
|
return *one - *another; |
|
} |
|
|
|
static int trace__validate_ev_qualifier(struct trace *trace) |
|
{ |
|
int err = 0; |
|
bool printed_invalid_prefix = false; |
|
struct str_node *pos; |
|
size_t nr_used = 0, nr_allocated = strlist__nr_entries(trace->ev_qualifier); |
|
|
|
trace->ev_qualifier_ids.entries = malloc(nr_allocated * |
|
sizeof(trace->ev_qualifier_ids.entries[0])); |
|
|
|
if (trace->ev_qualifier_ids.entries == NULL) { |
|
fputs("Error:\tNot enough memory for allocating events qualifier ids\n", |
|
trace->output); |
|
err = -EINVAL; |
|
goto out; |
|
} |
|
|
|
strlist__for_each_entry(pos, trace->ev_qualifier) { |
|
const char *sc = pos->s; |
|
int id = syscalltbl__id(trace->sctbl, sc), match_next = -1; |
|
|
|
if (id < 0) { |
|
id = syscalltbl__strglobmatch_first(trace->sctbl, sc, &match_next); |
|
if (id >= 0) |
|
goto matches; |
|
|
|
if (!printed_invalid_prefix) { |
|
pr_debug("Skipping unknown syscalls: "); |
|
printed_invalid_prefix = true; |
|
} else { |
|
pr_debug(", "); |
|
} |
|
|
|
pr_debug("%s", sc); |
|
continue; |
|
} |
|
matches: |
|
trace->ev_qualifier_ids.entries[nr_used++] = id; |
|
if (match_next == -1) |
|
continue; |
|
|
|
while (1) { |
|
id = syscalltbl__strglobmatch_next(trace->sctbl, sc, &match_next); |
|
if (id < 0) |
|
break; |
|
if (nr_allocated == nr_used) { |
|
void *entries; |
|
|
|
nr_allocated += 8; |
|
entries = realloc(trace->ev_qualifier_ids.entries, |
|
nr_allocated * sizeof(trace->ev_qualifier_ids.entries[0])); |
|
if (entries == NULL) { |
|
err = -ENOMEM; |
|
fputs("\nError:\t Not enough memory for parsing\n", trace->output); |
|
goto out_free; |
|
} |
|
trace->ev_qualifier_ids.entries = entries; |
|
} |
|
trace->ev_qualifier_ids.entries[nr_used++] = id; |
|
} |
|
} |
|
|
|
trace->ev_qualifier_ids.nr = nr_used; |
|
qsort(trace->ev_qualifier_ids.entries, nr_used, sizeof(int), intcmp); |
|
out: |
|
if (printed_invalid_prefix) |
|
pr_debug("\n"); |
|
return err; |
|
out_free: |
|
zfree(&trace->ev_qualifier_ids.entries); |
|
trace->ev_qualifier_ids.nr = 0; |
|
goto out; |
|
} |
|
|
|
static __maybe_unused bool trace__syscall_enabled(struct trace *trace, int id) |
|
{ |
|
bool in_ev_qualifier; |
|
|
|
if (trace->ev_qualifier_ids.nr == 0) |
|
return true; |
|
|
|
in_ev_qualifier = bsearch(&id, trace->ev_qualifier_ids.entries, |
|
trace->ev_qualifier_ids.nr, sizeof(int), intcmp) != NULL; |
|
|
|
if (in_ev_qualifier) |
|
return !trace->not_ev_qualifier; |
|
|
|
return trace->not_ev_qualifier; |
|
} |
|
|
|
/* |
|
* args is to be interpreted as a series of longs but we need to handle |
|
* 8-byte unaligned accesses. args points to raw_data within the event |
|
* and raw_data is guaranteed to be 8-byte unaligned because it is |
|
* preceded by raw_size which is a u32. So we need to copy args to a temp |
|
* variable to read it. Most notably this avoids extended load instructions |
|
* on unaligned addresses |
|
*/ |
|
unsigned long syscall_arg__val(struct syscall_arg *arg, u8 idx) |
|
{ |
|
unsigned long val; |
|
unsigned char *p = arg->args + sizeof(unsigned long) * idx; |
|
|
|
memcpy(&val, p, sizeof(val)); |
|
return val; |
|
} |
|
|
|
static size_t syscall__scnprintf_name(struct syscall *sc, char *bf, size_t size, |
|
struct syscall_arg *arg) |
|
{ |
|
if (sc->arg_fmt && sc->arg_fmt[arg->idx].name) |
|
return scnprintf(bf, size, "%s: ", sc->arg_fmt[arg->idx].name); |
|
|
|
return scnprintf(bf, size, "arg%d: ", arg->idx); |
|
} |
|
|
|
/* |
|
* Check if the value is in fact zero, i.e. mask whatever needs masking, such |
|
* as mount 'flags' argument that needs ignoring some magic flag, see comment |
|
* in tools/perf/trace/beauty/mount_flags.c |
|
*/ |
|
static unsigned long syscall_arg_fmt__mask_val(struct syscall_arg_fmt *fmt, struct syscall_arg *arg, unsigned long val) |
|
{ |
|
if (fmt && fmt->mask_val) |
|
return fmt->mask_val(arg, val); |
|
|
|
return val; |
|
} |
|
|
|
static size_t syscall_arg_fmt__scnprintf_val(struct syscall_arg_fmt *fmt, char *bf, size_t size, |
|
struct syscall_arg *arg, unsigned long val) |
|
{ |
|
if (fmt && fmt->scnprintf) { |
|
arg->val = val; |
|
if (fmt->parm) |
|
arg->parm = fmt->parm; |
|
return fmt->scnprintf(bf, size, arg); |
|
} |
|
return scnprintf(bf, size, "%ld", val); |
|
} |
|
|
|
static size_t syscall__scnprintf_args(struct syscall *sc, char *bf, size_t size, |
|
unsigned char *args, void *augmented_args, int augmented_args_size, |
|
struct trace *trace, struct thread *thread) |
|
{ |
|
size_t printed = 0; |
|
unsigned long val; |
|
u8 bit = 1; |
|
struct syscall_arg arg = { |
|
.args = args, |
|
.augmented = { |
|
.size = augmented_args_size, |
|
.args = augmented_args, |
|
}, |
|
.idx = 0, |
|
.mask = 0, |
|
.trace = trace, |
|
.thread = thread, |
|
.show_string_prefix = trace->show_string_prefix, |
|
}; |
|
struct thread_trace *ttrace = thread__priv(thread); |
|
|
|
/* |
|
* Things like fcntl will set this in its 'cmd' formatter to pick the |
|
* right formatter for the return value (an fd? file flags?), which is |
|
* not needed for syscalls that always return a given type, say an fd. |
|
*/ |
|
ttrace->ret_scnprintf = NULL; |
|
|
|
if (sc->args != NULL) { |
|
struct tep_format_field *field; |
|
|
|
for (field = sc->args; field; |
|
field = field->next, ++arg.idx, bit <<= 1) { |
|
if (arg.mask & bit) |
|
continue; |
|
|
|
arg.fmt = &sc->arg_fmt[arg.idx]; |
|
val = syscall_arg__val(&arg, arg.idx); |
|
/* |
|
* Some syscall args need some mask, most don't and |
|
* return val untouched. |
|
*/ |
|
val = syscall_arg_fmt__mask_val(&sc->arg_fmt[arg.idx], &arg, val); |
|
|
|
/* |
|
* Suppress this argument if its value is zero and |
|
* and we don't have a string associated in an |
|
* strarray for it. |
|
*/ |
|
if (val == 0 && |
|
!trace->show_zeros && |
|
!(sc->arg_fmt && |
|
(sc->arg_fmt[arg.idx].show_zero || |
|
sc->arg_fmt[arg.idx].scnprintf == SCA_STRARRAY || |
|
sc->arg_fmt[arg.idx].scnprintf == SCA_STRARRAYS) && |
|
sc->arg_fmt[arg.idx].parm)) |
|
continue; |
|
|
|
printed += scnprintf(bf + printed, size - printed, "%s", printed ? ", " : ""); |
|
|
|
if (trace->show_arg_names) |
|
printed += scnprintf(bf + printed, size - printed, "%s: ", field->name); |
|
|
|
printed += syscall_arg_fmt__scnprintf_val(&sc->arg_fmt[arg.idx], |
|
bf + printed, size - printed, &arg, val); |
|
} |
|
} else if (IS_ERR(sc->tp_format)) { |
|
/* |
|
* If we managed to read the tracepoint /format file, then we |
|
* may end up not having any args, like with gettid(), so only |
|
* print the raw args when we didn't manage to read it. |
|
*/ |
|
while (arg.idx < sc->nr_args) { |
|
if (arg.mask & bit) |
|
goto next_arg; |
|
val = syscall_arg__val(&arg, arg.idx); |
|
if (printed) |
|
printed += scnprintf(bf + printed, size - printed, ", "); |
|
printed += syscall__scnprintf_name(sc, bf + printed, size - printed, &arg); |
|
printed += syscall_arg_fmt__scnprintf_val(&sc->arg_fmt[arg.idx], bf + printed, size - printed, &arg, val); |
|
next_arg: |
|
++arg.idx; |
|
bit <<= 1; |
|
} |
|
} |
|
|
|
return printed; |
|
} |
|
|
|
typedef int (*tracepoint_handler)(struct trace *trace, struct evsel *evsel, |
|
union perf_event *event, |
|
struct perf_sample *sample); |
|
|
|
static struct syscall *trace__syscall_info(struct trace *trace, |
|
struct evsel *evsel, int id) |
|
{ |
|
int err = 0; |
|
|
|
if (id < 0) { |
|
|
|
/* |
|
* XXX: Noticed on x86_64, reproduced as far back as 3.0.36, haven't tried |
|
* before that, leaving at a higher verbosity level till that is |
|
* explained. Reproduced with plain ftrace with: |
|
* |
|
* echo 1 > /t/events/raw_syscalls/sys_exit/enable |
|
* grep "NR -1 " /t/trace_pipe |
|
* |
|
* After generating some load on the machine. |
|
*/ |
|
if (verbose > 1) { |
|
static u64 n; |
|
fprintf(trace->output, "Invalid syscall %d id, skipping (%s, %" PRIu64 ") ...\n", |
|
id, evsel__name(evsel), ++n); |
|
} |
|
return NULL; |
|
} |
|
|
|
err = -EINVAL; |
|
|
|
#ifdef HAVE_SYSCALL_TABLE_SUPPORT |
|
if (id > trace->sctbl->syscalls.max_id) { |
|
#else |
|
if (id >= trace->sctbl->syscalls.max_id) { |
|
/* |
|
* With libaudit we don't know beforehand what is the max_id, |
|
* so we let trace__read_syscall_info() figure that out as we |
|
* go on reading syscalls. |
|
*/ |
|
err = trace__read_syscall_info(trace, id); |
|
if (err) |
|
#endif |
|
goto out_cant_read; |
|
} |
|
|
|
if ((trace->syscalls.table == NULL || trace->syscalls.table[id].name == NULL) && |
|
(err = trace__read_syscall_info(trace, id)) != 0) |
|
goto out_cant_read; |
|
|
|
if (trace->syscalls.table[id].name == NULL) { |
|
if (trace->syscalls.table[id].nonexistent) |
|
return NULL; |
|
goto out_cant_read; |
|
} |
|
|
|
return &trace->syscalls.table[id]; |
|
|
|
out_cant_read: |
|
if (verbose > 0) { |
|
char sbuf[STRERR_BUFSIZE]; |
|
fprintf(trace->output, "Problems reading syscall %d: %d (%s)", id, -err, str_error_r(-err, sbuf, sizeof(sbuf))); |
|
if (id <= trace->sctbl->syscalls.max_id && trace->syscalls.table[id].name != NULL) |
|
fprintf(trace->output, "(%s)", trace->syscalls.table[id].name); |
|
fputs(" information\n", trace->output); |
|
} |
|
return NULL; |
|
} |
|
|
|
struct syscall_stats { |
|
struct stats stats; |
|
u64 nr_failures; |
|
int max_errno; |
|
u32 *errnos; |
|
}; |
|
|
|
static void thread__update_stats(struct thread *thread, struct thread_trace *ttrace, |
|
int id, struct perf_sample *sample, long err, bool errno_summary) |
|
{ |
|
struct int_node *inode; |
|
struct syscall_stats *stats; |
|
u64 duration = 0; |
|
|
|
inode = intlist__findnew(ttrace->syscall_stats, id); |
|
if (inode == NULL) |
|
return; |
|
|
|
stats = inode->priv; |
|
if (stats == NULL) { |
|
stats = malloc(sizeof(*stats)); |
|
if (stats == NULL) |
|
return; |
|
|
|
stats->nr_failures = 0; |
|
stats->max_errno = 0; |
|
stats->errnos = NULL; |
|
init_stats(&stats->stats); |
|
inode->priv = stats; |
|
} |
|
|
|
if (ttrace->entry_time && sample->time > ttrace->entry_time) |
|
duration = sample->time - ttrace->entry_time; |
|
|
|
update_stats(&stats->stats, duration); |
|
|
|
if (err < 0) { |
|
++stats->nr_failures; |
|
|
|
if (!errno_summary) |
|
return; |
|
|
|
err = -err; |
|
if (err > stats->max_errno) { |
|
u32 *new_errnos = realloc(stats->errnos, err * sizeof(u32)); |
|
|
|
if (new_errnos) { |
|
memset(new_errnos + stats->max_errno, 0, (err - stats->max_errno) * sizeof(u32)); |
|
} else { |
|
pr_debug("Not enough memory for errno stats for thread \"%s\"(%d/%d), results will be incomplete\n", |
|
thread__comm_str(thread), thread->pid_, thread->tid); |
|
return; |
|
} |
|
|
|
stats->errnos = new_errnos; |
|
stats->max_errno = err; |
|
} |
|
|
|
++stats->errnos[err - 1]; |
|
} |
|
} |
|
|
|
static int trace__printf_interrupted_entry(struct trace *trace) |
|
{ |
|
struct thread_trace *ttrace; |
|
size_t printed; |
|
int len; |
|
|
|
if (trace->failure_only || trace->current == NULL) |
|
return 0; |
|
|
|
ttrace = thread__priv(trace->current); |
|
|
|
if (!ttrace->entry_pending) |
|
return 0; |
|
|
|
printed = trace__fprintf_entry_head(trace, trace->current, 0, false, ttrace->entry_time, trace->output); |
|
printed += len = fprintf(trace->output, "%s)", ttrace->entry_str); |
|
|
|
if (len < trace->args_alignment - 4) |
|
printed += fprintf(trace->output, "%-*s", trace->args_alignment - 4 - len, " "); |
|
|
|
printed += fprintf(trace->output, " ...\n"); |
|
|
|
ttrace->entry_pending = false; |
|
++trace->nr_events_printed; |
|
|
|
return printed; |
|
} |
|
|
|
static int trace__fprintf_sample(struct trace *trace, struct evsel *evsel, |
|
struct perf_sample *sample, struct thread *thread) |
|
{ |
|
int printed = 0; |
|
|
|
if (trace->print_sample) { |
|
double ts = (double)sample->time / NSEC_PER_MSEC; |
|
|
|
printed += fprintf(trace->output, "%22s %10.3f %s %d/%d [%d]\n", |
|
evsel__name(evsel), ts, |
|
thread__comm_str(thread), |
|
sample->pid, sample->tid, sample->cpu); |
|
} |
|
|
|
return printed; |
|
} |
|
|
|
static void *syscall__augmented_args(struct syscall *sc, struct perf_sample *sample, int *augmented_args_size, int raw_augmented_args_size) |
|
{ |
|
void *augmented_args = NULL; |
|
/* |
|
* For now with BPF raw_augmented we hook into raw_syscalls:sys_enter |
|
* and there we get all 6 syscall args plus the tracepoint common fields |
|
* that gets calculated at the start and the syscall_nr (another long). |
|
* So we check if that is the case and if so don't look after the |
|
* sc->args_size but always after the full raw_syscalls:sys_enter payload, |
|
* which is fixed. |
|
* |
|
* We'll revisit this later to pass s->args_size to the BPF augmenter |
|
* (now tools/perf/examples/bpf/augmented_raw_syscalls.c, so that it |
|
* copies only what we need for each syscall, like what happens when we |
|
* use syscalls:sys_enter_NAME, so that we reduce the kernel/userspace |
|
* traffic to just what is needed for each syscall. |
|
*/ |
|
int args_size = raw_augmented_args_size ?: sc->args_size; |
|
|
|
*augmented_args_size = sample->raw_size - args_size; |
|
if (*augmented_args_size > 0) |
|
augmented_args = sample->raw_data + args_size; |
|
|
|
return augmented_args; |
|
} |
|
|
|
static void syscall__exit(struct syscall *sc) |
|
{ |
|
if (!sc) |
|
return; |
|
|
|
free(sc->arg_fmt); |
|
} |
|
|
|
static int trace__sys_enter(struct trace *trace, struct evsel *evsel, |
|
union perf_event *event __maybe_unused, |
|
struct perf_sample *sample) |
|
{ |
|
char *msg; |
|
void *args; |
|
int printed = 0; |
|
struct thread *thread; |
|
int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1; |
|
int augmented_args_size = 0; |
|
void *augmented_args = NULL; |
|
struct syscall *sc = trace__syscall_info(trace, evsel, id); |
|
struct thread_trace *ttrace; |
|
|
|
if (sc == NULL) |
|
return -1; |
|
|
|
thread = machine__findnew_thread(trace->host, sample->pid, sample->tid); |
|
ttrace = thread__trace(thread, trace->output); |
|
if (ttrace == NULL) |
|
goto out_put; |
|
|
|
trace__fprintf_sample(trace, evsel, sample, thread); |
|
|
|
args = perf_evsel__sc_tp_ptr(evsel, args, sample); |
|
|
|
if (ttrace->entry_str == NULL) { |
|
ttrace->entry_str = malloc(trace__entry_str_size); |
|
if (!ttrace->entry_str) |
|
goto out_put; |
|
} |
|
|
|
if (!(trace->duration_filter || trace->summary_only || trace->min_stack)) |
|
trace__printf_interrupted_entry(trace); |
|
/* |
|
* If this is raw_syscalls.sys_enter, then it always comes with the 6 possible |
|
* arguments, even if the syscall being handled, say "openat", uses only 4 arguments |
|
* this breaks syscall__augmented_args() check for augmented args, as we calculate |
|
* syscall->args_size using each syscalls:sys_enter_NAME tracefs format file, |
|
* so when handling, say the openat syscall, we end up getting 6 args for the |
|
* raw_syscalls:sys_enter event, when we expected just 4, we end up mistakenly |
|
* thinking that the extra 2 u64 args are the augmented filename, so just check |
|
* here and avoid using augmented syscalls when the evsel is the raw_syscalls one. |
|
*/ |
|
if (evsel != trace->syscalls.events.sys_enter) |
|
augmented_args = syscall__augmented_args(sc, sample, &augmented_args_size, trace->raw_augmented_syscalls_args_size); |
|
ttrace->entry_time = sample->time; |
|
msg = ttrace->entry_str; |
|
printed += scnprintf(msg + printed, trace__entry_str_size - printed, "%s(", sc->name); |
|
|
|
printed += syscall__scnprintf_args(sc, msg + printed, trace__entry_str_size - printed, |
|
args, augmented_args, augmented_args_size, trace, thread); |
|
|
|
if (sc->is_exit) { |
|
if (!(trace->duration_filter || trace->summary_only || trace->failure_only || trace->min_stack)) { |
|
int alignment = 0; |
|
|
|
trace__fprintf_entry_head(trace, thread, 0, false, ttrace->entry_time, trace->output); |
|
printed = fprintf(trace->output, "%s)", ttrace->entry_str); |
|
if (trace->args_alignment > printed) |
|
alignment = trace->args_alignment - printed; |
|
fprintf(trace->output, "%*s= ?\n", alignment, " "); |
|
} |
|
} else { |
|
ttrace->entry_pending = true; |
|
/* See trace__vfs_getname & trace__sys_exit */ |
|
ttrace->filename.pending_open = false; |
|
} |
|
|
|
if (trace->current != thread) { |
|
thread__put(trace->current); |
|
trace->current = thread__get(thread); |
|
} |
|
err = 0; |
|
out_put: |
|
thread__put(thread); |
|
return err; |
|
} |
|
|
|
static int trace__fprintf_sys_enter(struct trace *trace, struct evsel *evsel, |
|
struct perf_sample *sample) |
|
{ |
|
struct thread_trace *ttrace; |
|
struct thread *thread; |
|
int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1; |
|
struct syscall *sc = trace__syscall_info(trace, evsel, id); |
|
char msg[1024]; |
|
void *args, *augmented_args = NULL; |
|
int augmented_args_size; |
|
|
|
if (sc == NULL) |
|
return -1; |
|
|
|
thread = machine__findnew_thread(trace->host, sample->pid, sample->tid); |
|
ttrace = thread__trace(thread, trace->output); |
|
/* |
|
* We need to get ttrace just to make sure it is there when syscall__scnprintf_args() |
|
* and the rest of the beautifiers accessing it via struct syscall_arg touches it. |
|
*/ |
|
if (ttrace == NULL) |
|
goto out_put; |
|
|
|
args = perf_evsel__sc_tp_ptr(evsel, args, sample); |
|
augmented_args = syscall__augmented_args(sc, sample, &augmented_args_size, trace->raw_augmented_syscalls_args_size); |
|
syscall__scnprintf_args(sc, msg, sizeof(msg), args, augmented_args, augmented_args_size, trace, thread); |
|
fprintf(trace->output, "%s", msg); |
|
err = 0; |
|
out_put: |
|
thread__put(thread); |
|
return err; |
|
} |
|
|
|
static int trace__resolve_callchain(struct trace *trace, struct evsel *evsel, |
|
struct perf_sample *sample, |
|
struct callchain_cursor *cursor) |
|
{ |
|
struct addr_location al; |
|
int max_stack = evsel->core.attr.sample_max_stack ? |
|
evsel->core.attr.sample_max_stack : |
|
trace->max_stack; |
|
int err; |
|
|
|
if (machine__resolve(trace->host, &al, sample) < 0) |
|
return -1; |
|
|
|
err = thread__resolve_callchain(al.thread, cursor, evsel, sample, NULL, NULL, max_stack); |
|
addr_location__put(&al); |
|
return err; |
|
} |
|
|
|
static int trace__fprintf_callchain(struct trace *trace, struct perf_sample *sample) |
|
{ |
|
/* TODO: user-configurable print_opts */ |
|
const unsigned int print_opts = EVSEL__PRINT_SYM | |
|
EVSEL__PRINT_DSO | |
|
EVSEL__PRINT_UNKNOWN_AS_ADDR; |
|
|
|
return sample__fprintf_callchain(sample, 38, print_opts, &callchain_cursor, symbol_conf.bt_stop_list, trace->output); |
|
} |
|
|
|
static const char *errno_to_name(struct evsel *evsel, int err) |
|
{ |
|
struct perf_env *env = evsel__env(evsel); |
|
const char *arch_name = perf_env__arch(env); |
|
|
|
return arch_syscalls__strerrno(arch_name, err); |
|
} |
|
|
|
static int trace__sys_exit(struct trace *trace, struct evsel *evsel, |
|
union perf_event *event __maybe_unused, |
|
struct perf_sample *sample) |
|
{ |
|
long ret; |
|
u64 duration = 0; |
|
bool duration_calculated = false; |
|
struct thread *thread; |
|
int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1, callchain_ret = 0, printed = 0; |
|
int alignment = trace->args_alignment; |
|
struct syscall *sc = trace__syscall_info(trace, evsel, id); |
|
struct thread_trace *ttrace; |
|
|
|
if (sc == NULL) |
|
return -1; |
|
|
|
thread = machine__findnew_thread(trace->host, sample->pid, sample->tid); |
|
ttrace = thread__trace(thread, trace->output); |
|
if (ttrace == NULL) |
|
goto out_put; |
|
|
|
trace__fprintf_sample(trace, evsel, sample, thread); |
|
|
|
ret = perf_evsel__sc_tp_uint(evsel, ret, sample); |
|
|
|
if (trace->summary) |
|
thread__update_stats(thread, ttrace, id, sample, ret, trace->errno_summary); |
|
|
|
if (!trace->fd_path_disabled && sc->is_open && ret >= 0 && ttrace->filename.pending_open) { |
|
trace__set_fd_pathname(thread, ret, ttrace->filename.name); |
|
ttrace->filename.pending_open = false; |
|
++trace->stats.vfs_getname; |
|
} |
|
|
|
if (ttrace->entry_time) { |
|
duration = sample->time - ttrace->entry_time; |
|
if (trace__filter_duration(trace, duration)) |
|
goto out; |
|
duration_calculated = true; |
|
} else if (trace->duration_filter) |
|
goto out; |
|
|
|
if (sample->callchain) { |
|
callchain_ret = trace__resolve_callchain(trace, evsel, sample, &callchain_cursor); |
|
if (callchain_ret == 0) { |
|
if (callchain_cursor.nr < trace->min_stack) |
|
goto out; |
|
callchain_ret = 1; |
|
} |
|
} |
|
|
|
if (trace->summary_only || (ret >= 0 && trace->failure_only)) |
|
goto out; |
|
|
|
trace__fprintf_entry_head(trace, thread, duration, duration_calculated, ttrace->entry_time, trace->output); |
|
|
|
if (ttrace->entry_pending) { |
|
printed = fprintf(trace->output, "%s", ttrace->entry_str); |
|
} else { |
|
printed += fprintf(trace->output, " ... ["); |
|
color_fprintf(trace->output, PERF_COLOR_YELLOW, "continued"); |
|
printed += 9; |
|
printed += fprintf(trace->output, "]: %s()", sc->name); |
|
} |
|
|
|
printed++; /* the closing ')' */ |
|
|
|
if (alignment > printed) |
|
alignment -= printed; |
|
else |
|
alignment = 0; |
|
|
|
fprintf(trace->output, ")%*s= ", alignment, " "); |
|
|
|
if (sc->fmt == NULL) { |
|
if (ret < 0) |
|
goto errno_print; |
|
signed_print: |
|
fprintf(trace->output, "%ld", ret); |
|
} else if (ret < 0) { |
|
errno_print: { |
|
char bf[STRERR_BUFSIZE]; |
|
const char *emsg = str_error_r(-ret, bf, sizeof(bf)), |
|
*e = errno_to_name(evsel, -ret); |
|
|
|
fprintf(trace->output, "-1 %s (%s)", e, emsg); |
|
} |
|
} else if (ret == 0 && sc->fmt->timeout) |
|
fprintf(trace->output, "0 (Timeout)"); |
|
else if (ttrace->ret_scnprintf) { |
|
char bf[1024]; |
|
struct syscall_arg arg = { |
|
.val = ret, |
|
.thread = thread, |
|
.trace = trace, |
|
}; |
|
ttrace->ret_scnprintf(bf, sizeof(bf), &arg); |
|
ttrace->ret_scnprintf = NULL; |
|
fprintf(trace->output, "%s", bf); |
|
} else if (sc->fmt->hexret) |
|
fprintf(trace->output, "%#lx", ret); |
|
else if (sc->fmt->errpid) { |
|
struct thread *child = machine__find_thread(trace->host, ret, ret); |
|
|
|
if (child != NULL) { |
|
fprintf(trace->output, "%ld", ret); |
|
if (child->comm_set) |
|
fprintf(trace->output, " (%s)", thread__comm_str(child)); |
|
thread__put(child); |
|
} |
|
} else |
|
goto signed_print; |
|
|
|
fputc('\n', trace->output); |
|
|
|
/* |
|
* We only consider an 'event' for the sake of --max-events a non-filtered |
|
* sys_enter + sys_exit and other tracepoint events. |
|
*/ |
|
if (++trace->nr_events_printed == trace->max_events && trace->max_events != ULONG_MAX) |
|
interrupted = true; |
|
|
|
if (callchain_ret > 0) |
|
trace__fprintf_callchain(trace, sample); |
|
else if (callchain_ret < 0) |
|
pr_err("Problem processing %s callchain, skipping...\n", evsel__name(evsel)); |
|
out: |
|
ttrace->entry_pending = false; |
|
err = 0; |
|
out_put: |
|
thread__put(thread); |
|
return err; |
|
} |
|
|
|
static int trace__vfs_getname(struct trace *trace, struct evsel *evsel, |
|
union perf_event *event __maybe_unused, |
|
struct perf_sample *sample) |
|
{ |
|
struct thread *thread = machine__findnew_thread(trace->host, sample->pid, sample->tid); |
|
struct thread_trace *ttrace; |
|
size_t filename_len, entry_str_len, to_move; |
|
ssize_t remaining_space; |
|
char *pos; |
|
const char *filename = evsel__rawptr(evsel, sample, "pathname"); |
|
|
|
if (!thread) |
|
goto out; |
|
|
|
ttrace = thread__priv(thread); |
|
if (!ttrace) |
|
goto out_put; |
|
|
|
filename_len = strlen(filename); |
|
if (filename_len == 0) |
|
goto out_put; |
|
|
|
if (ttrace->filename.namelen < filename_len) { |
|
char *f = realloc(ttrace->filename.name, filename_len + 1); |
|
|
|
if (f == NULL) |
|
goto out_put; |
|
|
|
ttrace->filename.namelen = filename_len; |
|
ttrace->filename.name = f; |
|
} |
|
|
|
strcpy(ttrace->filename.name, filename); |
|
ttrace->filename.pending_open = true; |
|
|
|
if (!ttrace->filename.ptr) |
|
goto out_put; |
|
|
|
entry_str_len = strlen(ttrace->entry_str); |
|
remaining_space = trace__entry_str_size - entry_str_len - 1; /* \0 */ |
|
if (remaining_space <= 0) |
|
goto out_put; |
|
|
|
if (filename_len > (size_t)remaining_space) { |
|
filename += filename_len - remaining_space; |
|
filename_len = remaining_space; |
|
} |
|
|
|
to_move = entry_str_len - ttrace->filename.entry_str_pos + 1; /* \0 */ |
|
pos = ttrace->entry_str + ttrace->filename.entry_str_pos; |
|
memmove(pos + filename_len, pos, to_move); |
|
memcpy(pos, filename, filename_len); |
|
|
|
ttrace->filename.ptr = 0; |
|
ttrace->filename.entry_str_pos = 0; |
|
out_put: |
|
thread__put(thread); |
|
out: |
|
return 0; |
|
} |
|
|
|
static int trace__sched_stat_runtime(struct trace *trace, struct evsel *evsel, |
|
union perf_event *event __maybe_unused, |
|
struct perf_sample *sample) |
|
{ |
|
u64 runtime = evsel__intval(evsel, sample, "runtime"); |
|
double runtime_ms = (double)runtime / NSEC_PER_MSEC; |
|
struct thread *thread = machine__findnew_thread(trace->host, |
|
sample->pid, |
|
sample->tid); |
|
struct thread_trace *ttrace = thread__trace(thread, trace->output); |
|
|
|
if (ttrace == NULL) |
|
goto out_dump; |
|
|
|
ttrace->runtime_ms += runtime_ms; |
|
trace->runtime_ms += runtime_ms; |
|
out_put: |
|
thread__put(thread); |
|
return 0; |
|
|
|
out_dump: |
|
fprintf(trace->output, "%s: comm=%s,pid=%u,runtime=%" PRIu64 ",vruntime=%" PRIu64 ")\n", |
|
evsel->name, |
|
evsel__strval(evsel, sample, "comm"), |
|
(pid_t)evsel__intval(evsel, sample, "pid"), |
|
runtime, |
|
evsel__intval(evsel, sample, "vruntime")); |
|
goto out_put; |
|
} |
|
|
|
static int bpf_output__printer(enum binary_printer_ops op, |
|
unsigned int val, void *extra __maybe_unused, FILE *fp) |
|
{ |
|
unsigned char ch = (unsigned char)val; |
|
|
|
switch (op) { |
|
case BINARY_PRINT_CHAR_DATA: |
|
return fprintf(fp, "%c", isprint(ch) ? ch : '.'); |
|
case BINARY_PRINT_DATA_BEGIN: |
|
case BINARY_PRINT_LINE_BEGIN: |
|
case BINARY_PRINT_ADDR: |
|
case BINARY_PRINT_NUM_DATA: |
|
case BINARY_PRINT_NUM_PAD: |
|
case BINARY_PRINT_SEP: |
|
case BINARY_PRINT_CHAR_PAD: |
|
case BINARY_PRINT_LINE_END: |
|
case BINARY_PRINT_DATA_END: |
|
default: |
|
break; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static void bpf_output__fprintf(struct trace *trace, |
|
struct perf_sample *sample) |
|
{ |
|
binary__fprintf(sample->raw_data, sample->raw_size, 8, |
|
bpf_output__printer, NULL, trace->output); |
|
++trace->nr_events_printed; |
|
} |
|
|
|
static size_t trace__fprintf_tp_fields(struct trace *trace, struct evsel *evsel, struct perf_sample *sample, |
|
struct thread *thread, void *augmented_args, int augmented_args_size) |
|
{ |
|
char bf[2048]; |
|
size_t size = sizeof(bf); |
|
struct tep_format_field *field = evsel->tp_format->format.fields; |
|
struct syscall_arg_fmt *arg = __evsel__syscall_arg_fmt(evsel); |
|
size_t printed = 0; |
|
unsigned long val; |
|
u8 bit = 1; |
|
struct syscall_arg syscall_arg = { |
|
.augmented = { |
|
.size = augmented_args_size, |
|
.args = augmented_args, |
|
}, |
|
.idx = 0, |
|
.mask = 0, |
|
.trace = trace, |
|
.thread = thread, |
|
.show_string_prefix = trace->show_string_prefix, |
|
}; |
|
|
|
for (; field && arg; field = field->next, ++syscall_arg.idx, bit <<= 1, ++arg) { |
|
if (syscall_arg.mask & bit) |
|
continue; |
|
|
|
syscall_arg.len = 0; |
|
syscall_arg.fmt = arg; |
|
if (field->flags & TEP_FIELD_IS_ARRAY) { |
|
int offset = field->offset; |
|
|
|
if (field->flags & TEP_FIELD_IS_DYNAMIC) { |
|
offset = format_field__intval(field, sample, evsel->needs_swap); |
|
syscall_arg.len = offset >> 16; |
|
offset &= 0xffff; |
|
if (field->flags & TEP_FIELD_IS_RELATIVE) |
|
offset += field->offset + field->size; |
|
} |
|
|
|
val = (uintptr_t)(sample->raw_data + offset); |
|
} else |
|
val = format_field__intval(field, sample, evsel->needs_swap); |
|
/* |
|
* Some syscall args need some mask, most don't and |
|
* return val untouched. |
|
*/ |
|
val = syscall_arg_fmt__mask_val(arg, &syscall_arg, val); |
|
|
|
/* |
|
* Suppress this argument if its value is zero and |
|
* we don't have a string associated in an |
|
* strarray for it. |
|
*/ |
|
if (val == 0 && |
|
!trace->show_zeros && |
|
!((arg->show_zero || |
|
arg->scnprintf == SCA_STRARRAY || |
|
arg->scnprintf == SCA_STRARRAYS) && |
|
arg->parm)) |
|
continue; |
|
|
|
printed += scnprintf(bf + printed, size - printed, "%s", printed ? ", " : ""); |
|
|
|
/* |
|
* XXX Perhaps we should have a show_tp_arg_names, |
|
* leaving show_arg_names just for syscalls? |
|
*/ |
|
if (1 || trace->show_arg_names) |
|
printed += scnprintf(bf + printed, size - printed, "%s: ", field->name); |
|
|
|
printed += syscall_arg_fmt__scnprintf_val(arg, bf + printed, size - printed, &syscall_arg, val); |
|
} |
|
|
|
return printed + fprintf(trace->output, "%s", bf); |
|
} |
|
|
|
static int trace__event_handler(struct trace *trace, struct evsel *evsel, |
|
union perf_event *event __maybe_unused, |
|
struct perf_sample *sample) |
|
{ |
|
struct thread *thread; |
|
int callchain_ret = 0; |
|
/* |
|
* Check if we called perf_evsel__disable(evsel) due to, for instance, |
|
* this event's max_events having been hit and this is an entry coming |
|
* from the ring buffer that we should discard, since the max events |
|
* have already been considered/printed. |
|
*/ |
|
if (evsel->disabled) |
|
return 0; |
|
|
|
thread = machine__findnew_thread(trace->host, sample->pid, sample->tid); |
|
|
|
if (sample->callchain) { |
|
callchain_ret = trace__resolve_callchain(trace, evsel, sample, &callchain_cursor); |
|
if (callchain_ret == 0) { |
|
if (callchain_cursor.nr < trace->min_stack) |
|
goto out; |
|
callchain_ret = 1; |
|
} |
|
} |
|
|
|
trace__printf_interrupted_entry(trace); |
|
trace__fprintf_tstamp(trace, sample->time, trace->output); |
|
|
|
if (trace->trace_syscalls && trace->show_duration) |
|
fprintf(trace->output, "( ): "); |
|
|
|
if (thread) |
|
trace__fprintf_comm_tid(trace, thread, trace->output); |
|
|
|
if (evsel == trace->syscalls.events.augmented) { |
|
int id = perf_evsel__sc_tp_uint(evsel, id, sample); |
|
struct syscall *sc = trace__syscall_info(trace, evsel, id); |
|
|
|
if (sc) { |
|
fprintf(trace->output, "%s(", sc->name); |
|
trace__fprintf_sys_enter(trace, evsel, sample); |
|
fputc(')', trace->output); |
|
goto newline; |
|
} |
|
|
|
/* |
|
* XXX: Not having the associated syscall info or not finding/adding |
|
* the thread should never happen, but if it does... |
|
* fall thru and print it as a bpf_output event. |
|
*/ |
|
} |
|
|
|
fprintf(trace->output, "%s(", evsel->name); |
|
|
|
if (evsel__is_bpf_output(evsel)) { |
|
bpf_output__fprintf(trace, sample); |
|
} else if (evsel->tp_format) { |
|
if (strncmp(evsel->tp_format->name, "sys_enter_", 10) || |
|
trace__fprintf_sys_enter(trace, evsel, sample)) { |
|
if (trace->libtraceevent_print) { |
|
event_format__fprintf(evsel->tp_format, sample->cpu, |
|
sample->raw_data, sample->raw_size, |
|
trace->output); |
|
} else { |
|
trace__fprintf_tp_fields(trace, evsel, sample, thread, NULL, 0); |
|
} |
|
} |
|
} |
|
|
|
newline: |
|
fprintf(trace->output, ")\n"); |
|
|
|
if (callchain_ret > 0) |
|
trace__fprintf_callchain(trace, sample); |
|
else if (callchain_ret < 0) |
|
pr_err("Problem processing %s callchain, skipping...\n", evsel__name(evsel)); |
|
|
|
++trace->nr_events_printed; |
|
|
|
if (evsel->max_events != ULONG_MAX && ++evsel->nr_events_printed == evsel->max_events) { |
|
evsel__disable(evsel); |
|
evsel__close(evsel); |
|
} |
|
out: |
|
thread__put(thread); |
|
return 0; |
|
} |
|
|
|
static void print_location(FILE *f, struct perf_sample *sample, |
|
struct addr_location *al, |
|
bool print_dso, bool print_sym) |
|
{ |
|
|
|
if ((verbose > 0 || print_dso) && al->map) |
|
fprintf(f, "%s@", al->map->dso->long_name); |
|
|
|
if ((verbose > 0 || print_sym) && al->sym) |
|
fprintf(f, "%s+0x%" PRIx64, al->sym->name, |
|
al->addr - al->sym->start); |
|
else if (al->map) |
|
fprintf(f, "0x%" PRIx64, al->addr); |
|
else |
|
fprintf(f, "0x%" PRIx64, sample->addr); |
|
} |
|
|
|
static int trace__pgfault(struct trace *trace, |
|
struct evsel *evsel, |
|
union perf_event *event __maybe_unused, |
|
struct perf_sample *sample) |
|
{ |
|
struct thread *thread; |
|
struct addr_location al; |
|
char map_type = 'd'; |
|
struct thread_trace *ttrace; |
|
int err = -1; |
|
int callchain_ret = 0; |
|
|
|
thread = machine__findnew_thread(trace->host, sample->pid, sample->tid); |
|
|
|
if (sample->callchain) { |
|
callchain_ret = trace__resolve_callchain(trace, evsel, sample, &callchain_cursor); |
|
if (callchain_ret == 0) { |
|
if (callchain_cursor.nr < trace->min_stack) |
|
goto out_put; |
|
callchain_ret = 1; |
|
} |
|
} |
|
|
|
ttrace = thread__trace(thread, trace->output); |
|
if (ttrace == NULL) |
|
goto out_put; |
|
|
|
if (evsel->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS_MAJ) |
|
ttrace->pfmaj++; |
|
else |
|
ttrace->pfmin++; |
|
|
|
if (trace->summary_only) |
|
goto out; |
|
|
|
thread__find_symbol(thread, sample->cpumode, sample->ip, &al); |
|
|
|
trace__fprintf_entry_head(trace, thread, 0, true, sample->time, trace->output); |
|
|
|
fprintf(trace->output, "%sfault [", |
|
evsel->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS_MAJ ? |
|
"maj" : "min"); |
|
|
|
print_location(trace->output, sample, &al, false, true); |
|
|
|
fprintf(trace->output, "] => "); |
|
|
|
thread__find_symbol(thread, sample->cpumode, sample->addr, &al); |
|
|
|
if (!al.map) { |
|
thread__find_symbol(thread, sample->cpumode, sample->addr, &al); |
|
|
|
if (al.map) |
|
map_type = 'x'; |
|
else |
|
map_type = '?'; |
|
} |
|
|
|
print_location(trace->output, sample, &al, true, false); |
|
|
|
fprintf(trace->output, " (%c%c)\n", map_type, al.level); |
|
|
|
if (callchain_ret > 0) |
|
trace__fprintf_callchain(trace, sample); |
|
else if (callchain_ret < 0) |
|
pr_err("Problem processing %s callchain, skipping...\n", evsel__name(evsel)); |
|
|
|
++trace->nr_events_printed; |
|
out: |
|
err = 0; |
|
out_put: |
|
thread__put(thread); |
|
return err; |
|
} |
|
|
|
static void trace__set_base_time(struct trace *trace, |
|
struct evsel *evsel, |
|
struct perf_sample *sample) |
|
{ |
|
/* |
|
* BPF events were not setting PERF_SAMPLE_TIME, so be more robust |
|
* and don't use sample->time unconditionally, we may end up having |
|
* some other event in the future without PERF_SAMPLE_TIME for good |
|
* reason, i.e. we may not be interested in its timestamps, just in |
|
* it taking place, picking some piece of information when it |
|
* appears in our event stream (vfs_getname comes to mind). |
|
*/ |
|
if (trace->base_time == 0 && !trace->full_time && |
|
(evsel->core.attr.sample_type & PERF_SAMPLE_TIME)) |
|
trace->base_time = sample->time; |
|
} |
|
|
|
static int trace__process_sample(struct perf_tool *tool, |
|
union perf_event *event, |
|
struct perf_sample *sample, |
|
struct evsel *evsel, |
|
struct machine *machine __maybe_unused) |
|
{ |
|
struct trace *trace = container_of(tool, struct trace, tool); |
|
struct thread *thread; |
|
int err = 0; |
|
|
|
tracepoint_handler handler = evsel->handler; |
|
|
|
thread = machine__findnew_thread(trace->host, sample->pid, sample->tid); |
|
if (thread && thread__is_filtered(thread)) |
|
goto out; |
|
|
|
trace__set_base_time(trace, evsel, sample); |
|
|
|
if (handler) { |
|
++trace->nr_events; |
|
handler(trace, evsel, event, sample); |
|
} |
|
out: |
|
thread__put(thread); |
|
return err; |
|
} |
|
|
|
static int trace__record(struct trace *trace, int argc, const char **argv) |
|
{ |
|
unsigned int rec_argc, i, j; |
|
const char **rec_argv; |
|
const char * const record_args[] = { |
|
"record", |
|
"-R", |
|
"-m", "1024", |
|
"-c", "1", |
|
}; |
|
pid_t pid = getpid(); |
|
char *filter = asprintf__tp_filter_pids(1, &pid); |
|
const char * const sc_args[] = { "-e", }; |
|
unsigned int sc_args_nr = ARRAY_SIZE(sc_args); |
|
const char * const majpf_args[] = { "-e", "major-faults" }; |
|
unsigned int majpf_args_nr = ARRAY_SIZE(majpf_args); |
|
const char * const minpf_args[] = { "-e", "minor-faults" }; |
|
unsigned int minpf_args_nr = ARRAY_SIZE(minpf_args); |
|
int err = -1; |
|
|
|
/* +3 is for the event string below and the pid filter */ |
|
rec_argc = ARRAY_SIZE(record_args) + sc_args_nr + 3 + |
|
majpf_args_nr + minpf_args_nr + argc; |
|
rec_argv = calloc(rec_argc + 1, sizeof(char *)); |
|
|
|
if (rec_argv == NULL || filter == NULL) |
|
goto out_free; |
|
|
|
j = 0; |
|
for (i = 0; i < ARRAY_SIZE(record_args); i++) |
|
rec_argv[j++] = record_args[i]; |
|
|
|
if (trace->trace_syscalls) { |
|
for (i = 0; i < sc_args_nr; i++) |
|
rec_argv[j++] = sc_args[i]; |
|
|
|
/* event string may be different for older kernels - e.g., RHEL6 */ |
|
if (is_valid_tracepoint("raw_syscalls:sys_enter")) |
|
rec_argv[j++] = "raw_syscalls:sys_enter,raw_syscalls:sys_exit"; |
|
else if (is_valid_tracepoint("syscalls:sys_enter")) |
|
rec_argv[j++] = "syscalls:sys_enter,syscalls:sys_exit"; |
|
else { |
|
pr_err("Neither raw_syscalls nor syscalls events exist.\n"); |
|
goto out_free; |
|
} |
|
} |
|
|
|
rec_argv[j++] = "--filter"; |
|
rec_argv[j++] = filter; |
|
|
|
if (trace->trace_pgfaults & TRACE_PFMAJ) |
|
for (i = 0; i < majpf_args_nr; i++) |
|
rec_argv[j++] = majpf_args[i]; |
|
|
|
if (trace->trace_pgfaults & TRACE_PFMIN) |
|
for (i = 0; i < minpf_args_nr; i++) |
|
rec_argv[j++] = minpf_args[i]; |
|
|
|
for (i = 0; i < (unsigned int)argc; i++) |
|
rec_argv[j++] = argv[i]; |
|
|
|
err = cmd_record(j, rec_argv); |
|
out_free: |
|
free(filter); |
|
free(rec_argv); |
|
return err; |
|
} |
|
|
|
static size_t trace__fprintf_thread_summary(struct trace *trace, FILE *fp); |
|
|
|
static bool evlist__add_vfs_getname(struct evlist *evlist) |
|
{ |
|
bool found = false; |
|
struct evsel *evsel, *tmp; |
|
struct parse_events_error err; |
|
int ret; |
|
|
|
parse_events_error__init(&err); |
|
ret = parse_events(evlist, "probe:vfs_getname*", &err); |
|
parse_events_error__exit(&err); |
|
if (ret) |
|
return false; |
|
|
|
evlist__for_each_entry_safe(evlist, evsel, tmp) { |
|
if (!strstarts(evsel__name(evsel), "probe:vfs_getname")) |
|
continue; |
|
|
|
if (evsel__field(evsel, "pathname")) { |
|
evsel->handler = trace__vfs_getname; |
|
found = true; |
|
continue; |
|
} |
|
|
|
list_del_init(&evsel->core.node); |
|
evsel->evlist = NULL; |
|
evsel__delete(evsel); |
|
} |
|
|
|
return found; |
|
} |
|
|
|
static struct evsel *evsel__new_pgfault(u64 config) |
|
{ |
|
struct evsel *evsel; |
|
struct perf_event_attr attr = { |
|
.type = PERF_TYPE_SOFTWARE, |
|
.mmap_data = 1, |
|
}; |
|
|
|
attr.config = config; |
|
attr.sample_period = 1; |
|
|
|
event_attr_init(&attr); |
|
|
|
evsel = evsel__new(&attr); |
|
if (evsel) |
|
evsel->handler = trace__pgfault; |
|
|
|
return evsel; |
|
} |
|
|
|
static void evlist__free_syscall_tp_fields(struct evlist *evlist) |
|
{ |
|
struct evsel *evsel; |
|
|
|
evlist__for_each_entry(evlist, evsel) { |
|
struct evsel_trace *et = evsel->priv; |
|
|
|
if (!et || !evsel->tp_format || strcmp(evsel->tp_format->system, "syscalls")) |
|
continue; |
|
|
|
free(et->fmt); |
|
free(et); |
|
} |
|
} |
|
|
|
static void trace__handle_event(struct trace *trace, union perf_event *event, struct perf_sample *sample) |
|
{ |
|
const u32 type = event->header.type; |
|
struct evsel *evsel; |
|
|
|
if (type != PERF_RECORD_SAMPLE) { |
|
trace__process_event(trace, trace->host, event, sample); |
|
return; |
|
} |
|
|
|
evsel = evlist__id2evsel(trace->evlist, sample->id); |
|
if (evsel == NULL) { |
|
fprintf(trace->output, "Unknown tp ID %" PRIu64 ", skipping...\n", sample->id); |
|
return; |
|
} |
|
|
|
if (evswitch__discard(&trace->evswitch, evsel)) |
|
return; |
|
|
|
trace__set_base_time(trace, evsel, sample); |
|
|
|
if (evsel->core.attr.type == PERF_TYPE_TRACEPOINT && |
|
sample->raw_data == NULL) { |
|
fprintf(trace->output, "%s sample with no payload for tid: %d, cpu %d, raw_size=%d, skipping...\n", |
|
evsel__name(evsel), sample->tid, |
|
sample->cpu, sample->raw_size); |
|
} else { |
|
tracepoint_handler handler = evsel->handler; |
|
handler(trace, evsel, event, sample); |
|
} |
|
|
|
if (trace->nr_events_printed >= trace->max_events && trace->max_events != ULONG_MAX) |
|
interrupted = true; |
|
} |
|
|
|
static int trace__add_syscall_newtp(struct trace *trace) |
|
{ |
|
int ret = -1; |
|
struct evlist *evlist = trace->evlist; |
|
struct evsel *sys_enter, *sys_exit; |
|
|
|
sys_enter = perf_evsel__raw_syscall_newtp("sys_enter", trace__sys_enter); |
|
if (sys_enter == NULL) |
|
goto out; |
|
|
|
if (perf_evsel__init_sc_tp_ptr_field(sys_enter, args)) |
|
goto out_delete_sys_enter; |
|
|
|
sys_exit = perf_evsel__raw_syscall_newtp("sys_exit", trace__sys_exit); |
|
if (sys_exit == NULL) |
|
goto out_delete_sys_enter; |
|
|
|
if (perf_evsel__init_sc_tp_uint_field(sys_exit, ret)) |
|
goto out_delete_sys_exit; |
|
|
|
evsel__config_callchain(sys_enter, &trace->opts, &callchain_param); |
|
evsel__config_callchain(sys_exit, &trace->opts, &callchain_param); |
|
|
|
evlist__add(evlist, sys_enter); |
|
evlist__add(evlist, sys_exit); |
|
|
|
if (callchain_param.enabled && !trace->kernel_syscallchains) { |
|
/* |
|
* We're interested only in the user space callchain |
|
* leading to the syscall, allow overriding that for |
|
* debugging reasons using --kernel_syscall_callchains |
|
*/ |
|
sys_exit->core.attr.exclude_callchain_kernel = 1; |
|
} |
|
|
|
trace->syscalls.events.sys_enter = sys_enter; |
|
trace->syscalls.events.sys_exit = sys_exit; |
|
|
|
ret = 0; |
|
out: |
|
return ret; |
|
|
|
out_delete_sys_exit: |
|
evsel__delete_priv(sys_exit); |
|
out_delete_sys_enter: |
|
evsel__delete_priv(sys_enter); |
|
goto out; |
|
} |
|
|
|
static int trace__set_ev_qualifier_tp_filter(struct trace *trace) |
|
{ |
|
int err = -1; |
|
struct evsel *sys_exit; |
|
char *filter = asprintf_expr_inout_ints("id", !trace->not_ev_qualifier, |
|
trace->ev_qualifier_ids.nr, |
|
trace->ev_qualifier_ids.entries); |
|
|
|
if (filter == NULL) |
|
goto out_enomem; |
|
|
|
if (!evsel__append_tp_filter(trace->syscalls.events.sys_enter, filter)) { |
|
sys_exit = trace->syscalls.events.sys_exit; |
|
err = evsel__append_tp_filter(sys_exit, filter); |
|
} |
|
|
|
free(filter); |
|
out: |
|
return err; |
|
out_enomem: |
|
errno = ENOMEM; |
|
goto out; |
|
} |
|
|
|
#ifdef HAVE_LIBBPF_SUPPORT |
|
static struct bpf_map *trace__find_bpf_map_by_name(struct trace *trace, const char *name) |
|
{ |
|
if (trace->bpf_obj == NULL) |
|
return NULL; |
|
|
|
return bpf_object__find_map_by_name(trace->bpf_obj, name); |
|
} |
|
|
|
static void trace__set_bpf_map_filtered_pids(struct trace *trace) |
|
{ |
|
trace->filter_pids.map = trace__find_bpf_map_by_name(trace, "pids_filtered"); |
|
} |
|
|
|
static void trace__set_bpf_map_syscalls(struct trace *trace) |
|
{ |
|
trace->syscalls.map = trace__find_bpf_map_by_name(trace, "syscalls"); |
|
trace->syscalls.prog_array.sys_enter = trace__find_bpf_map_by_name(trace, "syscalls_sys_enter"); |
|
trace->syscalls.prog_array.sys_exit = trace__find_bpf_map_by_name(trace, "syscalls_sys_exit"); |
|
} |
|
|
|
static struct bpf_program *trace__find_bpf_program_by_title(struct trace *trace, const char *name) |
|
{ |
|
struct bpf_program *pos, *prog = NULL; |
|
const char *sec_name; |
|
|
|
if (trace->bpf_obj == NULL) |
|
return NULL; |
|
|
|
bpf_object__for_each_program(pos, trace->bpf_obj) { |
|
sec_name = bpf_program__section_name(pos); |
|
if (sec_name && !strcmp(sec_name, name)) { |
|
prog = pos; |
|
break; |
|
} |
|
} |
|
|
|
return prog; |
|
} |
|
|
|
static struct bpf_program *trace__find_syscall_bpf_prog(struct trace *trace, struct syscall *sc, |
|
const char *prog_name, const char *type) |
|
{ |
|
struct bpf_program *prog; |
|
|
|
if (prog_name == NULL) { |
|
char default_prog_name[256]; |
|
scnprintf(default_prog_name, sizeof(default_prog_name), "!syscalls:sys_%s_%s", type, sc->name); |
|
prog = trace__find_bpf_program_by_title(trace, default_prog_name); |
|
if (prog != NULL) |
|
goto out_found; |
|
if (sc->fmt && sc->fmt->alias) { |
|
scnprintf(default_prog_name, sizeof(default_prog_name), "!syscalls:sys_%s_%s", type, sc->fmt->alias); |
|
prog = trace__find_bpf_program_by_title(trace, default_prog_name); |
|
if (prog != NULL) |
|
goto out_found; |
|
} |
|
goto out_unaugmented; |
|
} |
|
|
|
prog = trace__find_bpf_program_by_title(trace, prog_name); |
|
|
|
if (prog != NULL) { |
|
out_found: |
|
return prog; |
|
} |
|
|
|
pr_debug("Couldn't find BPF prog \"%s\" to associate with syscalls:sys_%s_%s, not augmenting it\n", |
|
prog_name, type, sc->name); |
|
out_unaugmented: |
|
return trace->syscalls.unaugmented_prog; |
|
} |
|
|
|
static void trace__init_syscall_bpf_progs(struct trace *trace, int id) |
|
{ |
|
struct syscall *sc = trace__syscall_info(trace, NULL, id); |
|
|
|
if (sc == NULL) |
|
return; |
|
|
|
sc->bpf_prog.sys_enter = trace__find_syscall_bpf_prog(trace, sc, sc->fmt ? sc->fmt->bpf_prog_name.sys_enter : NULL, "enter"); |
|
sc->bpf_prog.sys_exit = trace__find_syscall_bpf_prog(trace, sc, sc->fmt ? sc->fmt->bpf_prog_name.sys_exit : NULL, "exit"); |
|
} |
|
|
|
static int trace__bpf_prog_sys_enter_fd(struct trace *trace, int id) |
|
{ |
|
struct syscall *sc = trace__syscall_info(trace, NULL, id); |
|
return sc ? bpf_program__fd(sc->bpf_prog.sys_enter) : bpf_program__fd(trace->syscalls.unaugmented_prog); |
|
} |
|
|
|
static int trace__bpf_prog_sys_exit_fd(struct trace *trace, int id) |
|
{ |
|
struct syscall *sc = trace__syscall_info(trace, NULL, id); |
|
return sc ? bpf_program__fd(sc->bpf_prog.sys_exit) : bpf_program__fd(trace->syscalls.unaugmented_prog); |
|
} |
|
|
|
static void trace__init_bpf_map_syscall_args(struct trace *trace, int id, struct bpf_map_syscall_entry *entry) |
|
{ |
|
struct syscall *sc = trace__syscall_info(trace, NULL, id); |
|
int arg = 0; |
|
|
|
if (sc == NULL) |
|
goto out; |
|
|
|
for (; arg < sc->nr_args; ++arg) { |
|
entry->string_args_len[arg] = 0; |
|
if (sc->arg_fmt[arg].scnprintf == SCA_FILENAME) { |
|
/* Should be set like strace -s strsize */ |
|
entry->string_args_len[arg] = PATH_MAX; |
|
} |
|
} |
|
out: |
|
for (; arg < 6; ++arg) |
|
entry->string_args_len[arg] = 0; |
|
} |
|
static int trace__set_ev_qualifier_bpf_filter(struct trace *trace) |
|
{ |
|
int fd = bpf_map__fd(trace->syscalls.map); |
|
struct bpf_map_syscall_entry value = { |
|
.enabled = !trace->not_ev_qualifier, |
|
}; |
|
int err = 0; |
|
size_t i; |
|
|
|
for (i = 0; i < trace->ev_qualifier_ids.nr; ++i) { |
|
int key = trace->ev_qualifier_ids.entries[i]; |
|
|
|
if (value.enabled) { |
|
trace__init_bpf_map_syscall_args(trace, key, &value); |
|
trace__init_syscall_bpf_progs(trace, key); |
|
} |
|
|
|
err = bpf_map_update_elem(fd, &key, &value, BPF_EXIST); |
|
if (err) |
|
break; |
|
} |
|
|
|
return err; |
|
} |
|
|
|
static int __trace__init_syscalls_bpf_map(struct trace *trace, bool enabled) |
|
{ |
|
int fd = bpf_map__fd(trace->syscalls.map); |
|
struct bpf_map_syscall_entry value = { |
|
.enabled = enabled, |
|
}; |
|
int err = 0, key; |
|
|
|
for (key = 0; key < trace->sctbl->syscalls.nr_entries; ++key) { |
|
if (enabled) |
|
trace__init_bpf_map_syscall_args(trace, key, &value); |
|
|
|
err = bpf_map_update_elem(fd, &key, &value, BPF_ANY); |
|
if (err) |
|
break; |
|
} |
|
|
|
return err; |
|
} |
|
|
|
static int trace__init_syscalls_bpf_map(struct trace *trace) |
|
{ |
|
bool enabled = true; |
|
|
|
if (trace->ev_qualifier_ids.nr) |
|
enabled = trace->not_ev_qualifier; |
|
|
|
return __trace__init_syscalls_bpf_map(trace, enabled); |
|
} |
|
|
|
static struct bpf_program *trace__find_usable_bpf_prog_entry(struct trace *trace, struct syscall *sc) |
|
{ |
|
struct tep_format_field *field, *candidate_field; |
|
int id; |
|
|
|
/* |
|
* We're only interested in syscalls that have a pointer: |
|
*/ |
|
for (field = sc->args; field; field = field->next) { |
|
if (field->flags & TEP_FIELD_IS_POINTER) |
|
goto try_to_find_pair; |
|
} |
|
|
|
return NULL; |
|
|
|
try_to_find_pair: |
|
for (id = 0; id < trace->sctbl->syscalls.nr_entries; ++id) { |
|
struct syscall *pair = trace__syscall_info(trace, NULL, id); |
|
struct bpf_program *pair_prog; |
|
bool is_candidate = false; |
|
|
|
if (pair == NULL || pair == sc || |
|
pair->bpf_prog.sys_enter == trace->syscalls.unaugmented_prog) |
|
continue; |
|
|
|
for (field = sc->args, candidate_field = pair->args; |
|
field && candidate_field; field = field->next, candidate_field = candidate_field->next) { |
|
bool is_pointer = field->flags & TEP_FIELD_IS_POINTER, |
|
candidate_is_pointer = candidate_field->flags & TEP_FIELD_IS_POINTER; |
|
|
|
if (is_pointer) { |
|
if (!candidate_is_pointer) { |
|
// The candidate just doesn't copies our pointer arg, might copy other pointers we want. |
|
continue; |
|
} |
|
} else { |
|
if (candidate_is_pointer) { |
|
// The candidate might copy a pointer we don't have, skip it. |
|
goto next_candidate; |
|
} |
|
continue; |
|
} |
|
|
|
if (strcmp(field->type, candidate_field->type)) |
|
goto next_candidate; |
|
|
|
is_candidate = true; |
|
} |
|
|
|
if (!is_candidate) |
|
goto next_candidate; |
|
|
|
/* |
|
* Check if the tentative pair syscall augmenter has more pointers, if it has, |
|
* then it may be collecting that and we then can't use it, as it would collect |
|
* more than what is common to the two syscalls. |
|
*/ |
|
if (candidate_field) { |
|
for (candidate_field = candidate_field->next; candidate_field; candidate_field = candidate_field->next) |
|
if (candidate_field->flags & TEP_FIELD_IS_POINTER) |
|
goto next_candidate; |
|
} |
|
|
|
pair_prog = pair->bpf_prog.sys_enter; |
|
/* |
|
* If the pair isn't enabled, then its bpf_prog.sys_enter will not |
|
* have been searched for, so search it here and if it returns the |
|
* unaugmented one, then ignore it, otherwise we'll reuse that BPF |
|
* program for a filtered syscall on a non-filtered one. |
|
* |
|
* For instance, we have "!syscalls:sys_enter_renameat" and that is |
|
* useful for "renameat2". |
|
*/ |
|
if (pair_prog == NULL) { |
|
pair_prog = trace__find_syscall_bpf_prog(trace, pair, pair->fmt ? pair->fmt->bpf_prog_name.sys_enter : NULL, "enter"); |
|
if (pair_prog == trace->syscalls.unaugmented_prog) |
|
goto next_candidate; |
|
} |
|
|
|
pr_debug("Reusing \"%s\" BPF sys_enter augmenter for \"%s\"\n", pair->name, sc->name); |
|
return pair_prog; |
|
next_candidate: |
|
continue; |
|
} |
|
|
|
return NULL; |
|
} |
|
|
|
static int trace__init_syscalls_bpf_prog_array_maps(struct trace *trace) |
|
{ |
|
int map_enter_fd = bpf_map__fd(trace->syscalls.prog_array.sys_enter), |
|
map_exit_fd = bpf_map__fd(trace->syscalls.prog_array.sys_exit); |
|
int err = 0, key; |
|
|
|
for (key = 0; key < trace->sctbl->syscalls.nr_entries; ++key) { |
|
int prog_fd; |
|
|
|
if (!trace__syscall_enabled(trace, key)) |
|
continue; |
|
|
|
trace__init_syscall_bpf_progs(trace, key); |
|
|
|
// It'll get at least the "!raw_syscalls:unaugmented" |
|
prog_fd = trace__bpf_prog_sys_enter_fd(trace, key); |
|
err = bpf_map_update_elem(map_enter_fd, &key, &prog_fd, BPF_ANY); |
|
if (err) |
|
break; |
|
prog_fd = trace__bpf_prog_sys_exit_fd(trace, key); |
|
err = bpf_map_update_elem(map_exit_fd, &key, &prog_fd, BPF_ANY); |
|
if (err) |
|
break; |
|
} |
|
|
|
/* |
|
* Now lets do a second pass looking for enabled syscalls without |
|
* an augmenter that have a signature that is a superset of another |
|
* syscall with an augmenter so that we can auto-reuse it. |
|
* |
|
* I.e. if we have an augmenter for the "open" syscall that has |
|
* this signature: |
|
* |
|
* int open(const char *pathname, int flags, mode_t mode); |
|
* |
|
* I.e. that will collect just the first string argument, then we |
|
* can reuse it for the 'creat' syscall, that has this signature: |
|
* |
|
* int creat(const char *pathname, mode_t mode); |
|
* |
|
* and for: |
|
* |
|
* int stat(const char *pathname, struct stat *statbuf); |
|
* int lstat(const char *pathname, struct stat *statbuf); |
|
* |
|
* Because the 'open' augmenter will collect the first arg as a string, |
|
* and leave alone all the other args, which already helps with |
|
* beautifying 'stat' and 'lstat''s pathname arg. |
|
* |
|
* Then, in time, when 'stat' gets an augmenter that collects both |
|
* first and second arg (this one on the raw_syscalls:sys_exit prog |
|
* array tail call, then that one will be used. |
|
*/ |
|
for (key = 0; key < trace->sctbl->syscalls.nr_entries; ++key) { |
|
struct syscall *sc = trace__syscall_info(trace, NULL, key); |
|
struct bpf_program *pair_prog; |
|
int prog_fd; |
|
|
|
if (sc == NULL || sc->bpf_prog.sys_enter == NULL) |
|
continue; |
|
|
|
/* |
|
* For now we're just reusing the sys_enter prog, and if it |
|
* already has an augmenter, we don't need to find one. |
|
*/ |
|
if (sc->bpf_prog.sys_enter != trace->syscalls.unaugmented_prog) |
|
continue; |
|
|
|
/* |
|
* Look at all the other syscalls for one that has a signature |
|
* that is close enough that we can share: |
|
*/ |
|
pair_prog = trace__find_usable_bpf_prog_entry(trace, sc); |
|
if (pair_prog == NULL) |
|
continue; |
|
|
|
sc->bpf_prog.sys_enter = pair_prog; |
|
|
|
/* |
|
* Update the BPF_MAP_TYPE_PROG_SHARED for raw_syscalls:sys_enter |
|
* with the fd for the program we're reusing: |
|
*/ |
|
prog_fd = bpf_program__fd(sc->bpf_prog.sys_enter); |
|
err = bpf_map_update_elem(map_enter_fd, &key, &prog_fd, BPF_ANY); |
|
if (err) |
|
break; |
|
} |
|
|
|
|
|
return err; |
|
} |
|
|
|
static void trace__delete_augmented_syscalls(struct trace *trace) |
|
{ |
|
struct evsel *evsel, *tmp; |
|
|
|
evlist__remove(trace->evlist, trace->syscalls.events.augmented); |
|
evsel__delete(trace->syscalls.events.augmented); |
|
trace->syscalls.events.augmented = NULL; |
|
|
|
evlist__for_each_entry_safe(trace->evlist, tmp, evsel) { |
|
if (evsel->bpf_obj == trace->bpf_obj) { |
|
evlist__remove(trace->evlist, evsel); |
|
evsel__delete(evsel); |
|
} |
|
|
|
} |
|
|
|
bpf_object__close(trace->bpf_obj); |
|
trace->bpf_obj = NULL; |
|
} |
|
#else // HAVE_LIBBPF_SUPPORT |
|
static struct bpf_map *trace__find_bpf_map_by_name(struct trace *trace __maybe_unused, |
|
const char *name __maybe_unused) |
|
{ |
|
return NULL; |
|
} |
|
|
|
static void trace__set_bpf_map_filtered_pids(struct trace *trace __maybe_unused) |
|
{ |
|
} |
|
|
|
static void trace__set_bpf_map_syscalls(struct trace *trace __maybe_unused) |
|
{ |
|
} |
|
|
|
static int trace__set_ev_qualifier_bpf_filter(struct trace *trace __maybe_unused) |
|
{ |
|
return 0; |
|
} |
|
|
|
static int trace__init_syscalls_bpf_map(struct trace *trace __maybe_unused) |
|
{ |
|
return 0; |
|
} |
|
|
|
static struct bpf_program *trace__find_bpf_program_by_title(struct trace *trace __maybe_unused, |
|
const char *name __maybe_unused) |
|
{ |
|
return NULL; |
|
} |
|
|
|
static int trace__init_syscalls_bpf_prog_array_maps(struct trace *trace __maybe_unused) |
|
{ |
|
return 0; |
|
} |
|
|
|
static void trace__delete_augmented_syscalls(struct trace *trace __maybe_unused) |
|
{ |
|
} |
|
#endif // HAVE_LIBBPF_SUPPORT |
|
|
|
static bool trace__only_augmented_syscalls_evsels(struct trace *trace) |
|
{ |
|
struct evsel *evsel; |
|
|
|
evlist__for_each_entry(trace->evlist, evsel) { |
|
if (evsel == trace->syscalls.events.augmented || |
|
evsel->bpf_obj == trace->bpf_obj) |
|
continue; |
|
|
|
return false; |
|
} |
|
|
|
return true; |
|
} |
|
|
|
static int trace__set_ev_qualifier_filter(struct trace *trace) |
|
{ |
|
if (trace->syscalls.map) |
|
return trace__set_ev_qualifier_bpf_filter(trace); |
|
if (trace->syscalls.events.sys_enter) |
|
return trace__set_ev_qualifier_tp_filter(trace); |
|
return 0; |
|
} |
|
|
|
static int bpf_map__set_filter_pids(struct bpf_map *map __maybe_unused, |
|
size_t npids __maybe_unused, pid_t *pids __maybe_unused) |
|
{ |
|
int err = 0; |
|
#ifdef HAVE_LIBBPF_SUPPORT |
|
bool value = true; |
|
int map_fd = bpf_map__fd(map); |
|
size_t i; |
|
|
|
for (i = 0; i < npids; ++i) { |
|
err = bpf_map_update_elem(map_fd, &pids[i], &value, BPF_ANY); |
|
if (err) |
|
break; |
|
} |
|
#endif |
|
return err; |
|
} |
|
|
|
static int trace__set_filter_loop_pids(struct trace *trace) |
|
{ |
|
unsigned int nr = 1, err; |
|
pid_t pids[32] = { |
|
getpid(), |
|
}; |
|
struct thread *thread = machine__find_thread(trace->host, pids[0], pids[0]); |
|
|
|
while (thread && nr < ARRAY_SIZE(pids)) { |
|
struct thread *parent = machine__find_thread(trace->host, thread->ppid, thread->ppid); |
|
|
|
if (parent == NULL) |
|
break; |
|
|
|
if (!strcmp(thread__comm_str(parent), "sshd") || |
|
strstarts(thread__comm_str(parent), "gnome-terminal")) { |
|
pids[nr++] = parent->tid; |
|
break; |
|
} |
|
thread = parent; |
|
} |
|
|
|
err = evlist__append_tp_filter_pids(trace->evlist, nr, pids); |
|
if (!err && trace->filter_pids.map) |
|
err = bpf_map__set_filter_pids(trace->filter_pids.map, nr, pids); |
|
|
|
return err; |
|
} |
|
|
|
static int trace__set_filter_pids(struct trace *trace) |
|
{ |
|
int err = 0; |
|
/* |
|
* Better not use !target__has_task() here because we need to cover the |
|
* case where no threads were specified in the command line, but a |
|
* workload was, and in that case we will fill in the thread_map when |
|
* we fork the workload in evlist__prepare_workload. |
|
*/ |
|
if (trace->filter_pids.nr > 0) { |
|
err = evlist__append_tp_filter_pids(trace->evlist, trace->filter_pids.nr, |
|
trace->filter_pids.entries); |
|
if (!err && trace->filter_pids.map) { |
|
err = bpf_map__set_filter_pids(trace->filter_pids.map, trace->filter_pids.nr, |
|
trace->filter_pids.entries); |
|
} |
|
} else if (perf_thread_map__pid(trace->evlist->core.threads, 0) == -1) { |
|
err = trace__set_filter_loop_pids(trace); |
|
} |
|
|
|
return err; |
|
} |
|
|
|
static int __trace__deliver_event(struct trace *trace, union perf_event *event) |
|
{ |
|
struct evlist *evlist = trace->evlist; |
|
struct perf_sample sample; |
|
int err = evlist__parse_sample(evlist, event, &sample); |
|
|
|
if (err) |
|
fprintf(trace->output, "Can't parse sample, err = %d, skipping...\n", err); |
|
else |
|
trace__handle_event(trace, event, &sample); |
|
|
|
return 0; |
|
} |
|
|
|
static int __trace__flush_events(struct trace *trace) |
|
{ |
|
u64 first = ordered_events__first_time(&trace->oe.data); |
|
u64 flush = trace->oe.last - NSEC_PER_SEC; |
|
|
|
/* Is there some thing to flush.. */ |
|
if (first && first < flush) |
|
return ordered_events__flush_time(&trace->oe.data, flush); |
|
|
|
return 0; |
|
} |
|
|
|
static int trace__flush_events(struct trace *trace) |
|
{ |
|
return !trace->sort_events ? 0 : __trace__flush_events(trace); |
|
} |
|
|
|
static int trace__deliver_event(struct trace *trace, union perf_event *event) |
|
{ |
|
int err; |
|
|
|
if (!trace->sort_events) |
|
return __trace__deliver_event(trace, event); |
|
|
|
err = evlist__parse_sample_timestamp(trace->evlist, event, &trace->oe.last); |
|
if (err && err != -1) |
|
return err; |
|
|
|
err = ordered_events__queue(&trace->oe.data, event, trace->oe.last, 0, NULL); |
|
if (err) |
|
return err; |
|
|
|
return trace__flush_events(trace); |
|
} |
|
|
|
static int ordered_events__deliver_event(struct ordered_events *oe, |
|
struct ordered_event *event) |
|
{ |
|
struct trace *trace = container_of(oe, struct trace, oe.data); |
|
|
|
return __trace__deliver_event(trace, event->event); |
|
} |
|
|
|
static struct syscall_arg_fmt *evsel__find_syscall_arg_fmt_by_name(struct evsel *evsel, char *arg) |
|
{ |
|
struct tep_format_field *field; |
|
struct syscall_arg_fmt *fmt = __evsel__syscall_arg_fmt(evsel); |
|
|
|
if (evsel->tp_format == NULL || fmt == NULL) |
|
return NULL; |
|
|
|
for (field = evsel->tp_format->format.fields; field; field = field->next, ++fmt) |
|
if (strcmp(field->name, arg) == 0) |
|
return fmt; |
|
|
|
return NULL; |
|
} |
|
|
|
static int trace__expand_filter(struct trace *trace __maybe_unused, struct evsel *evsel) |
|
{ |
|
char *tok, *left = evsel->filter, *new_filter = evsel->filter; |
|
|
|
while ((tok = strpbrk(left, "=<>!")) != NULL) { |
|
char *right = tok + 1, *right_end; |
|
|
|
if (*right == '=') |
|
++right; |
|
|
|
while (isspace(*right)) |
|
++right; |
|
|
|
if (*right == '\0') |
|
break; |
|
|
|
while (!isalpha(*left)) |
|
if (++left == tok) { |
|
/* |
|
* Bail out, can't find the name of the argument that is being |
|
* used in the filter, let it try to set this filter, will fail later. |
|
*/ |
|
return 0; |
|
} |
|
|
|
right_end = right + 1; |
|
while (isalnum(*right_end) || *right_end == '_' || *right_end == '|') |
|
++right_end; |
|
|
|
if (isalpha(*right)) { |
|
struct syscall_arg_fmt *fmt; |
|
int left_size = tok - left, |
|
right_size = right_end - right; |
|
char arg[128]; |
|
|
|
while (isspace(left[left_size - 1])) |
|
--left_size; |
|
|
|
scnprintf(arg, sizeof(arg), "%.*s", left_size, left); |
|
|
|
fmt = evsel__find_syscall_arg_fmt_by_name(evsel, arg); |
|
if (fmt == NULL) { |
|
pr_err("\"%s\" not found in \"%s\", can't set filter \"%s\"\n", |
|
arg, evsel->name, evsel->filter); |
|
return -1; |
|
} |
|
|
|
pr_debug2("trying to expand \"%s\" \"%.*s\" \"%.*s\" -> ", |
|
arg, (int)(right - tok), tok, right_size, right); |
|
|
|
if (fmt->strtoul) { |
|
u64 val; |
|
struct syscall_arg syscall_arg = { |
|
.parm = fmt->parm, |
|
}; |
|
|
|
if (fmt->strtoul(right, right_size, &syscall_arg, &val)) { |
|
char *n, expansion[19]; |
|
int expansion_lenght = scnprintf(expansion, sizeof(expansion), "%#" PRIx64, val); |
|
int expansion_offset = right - new_filter; |
|
|
|
pr_debug("%s", expansion); |
|
|
|
if (asprintf(&n, "%.*s%s%s", expansion_offset, new_filter, expansion, right_end) < 0) { |
|
pr_debug(" out of memory!\n"); |
|
free(new_filter); |
|
return -1; |
|
} |
|
if (new_filter != evsel->filter) |
|
free(new_filter); |
|
left = n + expansion_offset + expansion_lenght; |
|
new_filter = n; |
|
} else { |
|
pr_err("\"%.*s\" not found for \"%s\" in \"%s\", can't set filter \"%s\"\n", |
|
right_size, right, arg, evsel->name, evsel->filter); |
|
return -1; |
|
} |
|
} else { |
|
pr_err("No resolver (strtoul) for \"%s\" in \"%s\", can't set filter \"%s\"\n", |
|
arg, evsel->name, evsel->filter); |
|
return -1; |
|
} |
|
|
|
pr_debug("\n"); |
|
} else { |
|
left = right_end; |
|
} |
|
} |
|
|
|
if (new_filter != evsel->filter) { |
|
pr_debug("New filter for %s: %s\n", evsel->name, new_filter); |
|
evsel__set_filter(evsel, new_filter); |
|
free(new_filter); |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static int trace__expand_filters(struct trace *trace, struct evsel **err_evsel) |
|
{ |
|
struct evlist *evlist = trace->evlist; |
|
struct evsel *evsel; |
|
|
|
evlist__for_each_entry(evlist, evsel) { |
|
if (evsel->filter == NULL) |
|
continue; |
|
|
|
if (trace__expand_filter(trace, evsel)) { |
|
*err_evsel = evsel; |
|
return -1; |
|
} |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static int trace__run(struct trace *trace, int argc, const char **argv) |
|
{ |
|
struct evlist *evlist = trace->evlist; |
|
struct evsel *evsel, *pgfault_maj = NULL, *pgfault_min = NULL; |
|
int err = -1, i; |
|
unsigned long before; |
|
const bool forks = argc > 0; |
|
bool draining = false; |
|
|
|
trace->live = true; |
|
|
|
if (!trace->raw_augmented_syscalls) { |
|
if (trace->trace_syscalls && trace__add_syscall_newtp(trace)) |
|
goto out_error_raw_syscalls; |
|
|
|
if (trace->trace_syscalls) |
|
trace->vfs_getname = evlist__add_vfs_getname(evlist); |
|
} |
|
|
|
if ((trace->trace_pgfaults & TRACE_PFMAJ)) { |
|
pgfault_maj = evsel__new_pgfault(PERF_COUNT_SW_PAGE_FAULTS_MAJ); |
|
if (pgfault_maj == NULL) |
|
goto out_error_mem; |
|
evsel__config_callchain(pgfault_maj, &trace->opts, &callchain_param); |
|
evlist__add(evlist, pgfault_maj); |
|
} |
|
|
|
if ((trace->trace_pgfaults & TRACE_PFMIN)) { |
|
pgfault_min = evsel__new_pgfault(PERF_COUNT_SW_PAGE_FAULTS_MIN); |
|
if (pgfault_min == NULL) |
|
goto out_error_mem; |
|
evsel__config_callchain(pgfault_min, &trace->opts, &callchain_param); |
|
evlist__add(evlist, pgfault_min); |
|
} |
|
|
|
/* Enable ignoring missing threads when -u/-p option is defined. */ |
|
trace->opts.ignore_missing_thread = trace->opts.target.uid != UINT_MAX || trace->opts.target.pid; |
|
|
|
if (trace->sched && |
|
evlist__add_newtp(evlist, "sched", "sched_stat_runtime", trace__sched_stat_runtime)) |
|
goto out_error_sched_stat_runtime; |
|
/* |
|
* If a global cgroup was set, apply it to all the events without an |
|
* explicit cgroup. I.e.: |
|
* |
|
* trace -G A -e sched:*switch |
|
* |
|
* Will set all raw_syscalls:sys_{enter,exit}, pgfault, vfs_getname, etc |
|
* _and_ sched:sched_switch to the 'A' cgroup, while: |
|
* |
|
* trace -e sched:*switch -G A |
|
* |
|
* will only set the sched:sched_switch event to the 'A' cgroup, all the |
|
* other events (raw_syscalls:sys_{enter,exit}, etc are left "without" |
|
* a cgroup (on the root cgroup, sys wide, etc). |
|
* |
|
* Multiple cgroups: |
|
* |
|
* trace -G A -e sched:*switch -G B |
|
* |
|
* the syscall ones go to the 'A' cgroup, the sched:sched_switch goes |
|
* to the 'B' cgroup. |
|
* |
|
* evlist__set_default_cgroup() grabs a reference of the passed cgroup |
|
* only for the evsels still without a cgroup, i.e. evsel->cgroup == NULL. |
|
*/ |
|
if (trace->cgroup) |
|
evlist__set_default_cgroup(trace->evlist, trace->cgroup); |
|
|
|
err = evlist__create_maps(evlist, &trace->opts.target); |
|
if (err < 0) { |
|
fprintf(trace->output, "Problems parsing the target to trace, check your options!\n"); |
|
goto out_delete_evlist; |
|
} |
|
|
|
err = trace__symbols_init(trace, evlist); |
|
if (err < 0) { |
|
fprintf(trace->output, "Problems initializing symbol libraries!\n"); |
|
goto out_delete_evlist; |
|
} |
|
|
|
evlist__config(evlist, &trace->opts, &callchain_param); |
|
|
|
if (forks) { |
|
err = evlist__prepare_workload(evlist, &trace->opts.target, argv, false, NULL); |
|
if (err < 0) { |
|
fprintf(trace->output, "Couldn't run the workload!\n"); |
|
goto out_delete_evlist; |
|
} |
|
workload_pid = evlist->workload.pid; |
|
} |
|
|
|
err = evlist__open(evlist); |
|
if (err < 0) |
|
goto out_error_open; |
|
|
|
err = bpf__apply_obj_config(); |
|
if (err) { |
|
char errbuf[BUFSIZ]; |
|
|
|
bpf__strerror_apply_obj_config(err, errbuf, sizeof(errbuf)); |
|
pr_err("ERROR: Apply config to BPF failed: %s\n", |
|
errbuf); |
|
goto out_error_open; |
|
} |
|
|
|
err = trace__set_filter_pids(trace); |
|
if (err < 0) |
|
goto out_error_mem; |
|
|
|
if (trace->syscalls.map) |
|
trace__init_syscalls_bpf_map(trace); |
|
|
|
if (trace->syscalls.prog_array.sys_enter) |
|
trace__init_syscalls_bpf_prog_array_maps(trace); |
|
|
|
if (trace->ev_qualifier_ids.nr > 0) { |
|
err = trace__set_ev_qualifier_filter(trace); |
|
if (err < 0) |
|
goto out_errno; |
|
|
|
if (trace->syscalls.events.sys_exit) { |
|
pr_debug("event qualifier tracepoint filter: %s\n", |
|
trace->syscalls.events.sys_exit->filter); |
|
} |
|
} |
|
|
|
/* |
|
* If the "close" syscall is not traced, then we will not have the |
|
* opportunity to, in syscall_arg__scnprintf_close_fd() invalidate the |
|
* fd->pathname table and were ending up showing the last value set by |
|
* syscalls opening a pathname and associating it with a descriptor or |
|
* reading it from /proc/pid/fd/ in cases where that doesn't make |
|
* sense. |
|
* |
|
* So just disable this beautifier (SCA_FD, SCA_FDAT) when 'close' is |
|
* not in use. |
|
*/ |
|
trace->fd_path_disabled = !trace__syscall_enabled(trace, syscalltbl__id(trace->sctbl, "close")); |
|
|
|
err = trace__expand_filters(trace, &evsel); |
|
if (err) |
|
goto out_delete_evlist; |
|
err = evlist__apply_filters(evlist, &evsel); |
|
if (err < 0) |
|
goto out_error_apply_filters; |
|
|
|
if (trace->dump.map) |
|
bpf_map__fprintf(trace->dump.map, trace->output); |
|
|
|
err = evlist__mmap(evlist, trace->opts.mmap_pages); |
|
if (err < 0) |
|
goto out_error_mmap; |
|
|
|
if (!target__none(&trace->opts.target) && !trace->opts.initial_delay) |
|
evlist__enable(evlist); |
|
|
|
if (forks) |
|
evlist__start_workload(evlist); |
|
|
|
if (trace->opts.initial_delay) { |
|
usleep(trace->opts.initial_delay * 1000); |
|
evlist__enable(evlist); |
|
} |
|
|
|
trace->multiple_threads = perf_thread_map__pid(evlist->core.threads, 0) == -1 || |
|
evlist->core.threads->nr > 1 || |
|
evlist__first(evlist)->core.attr.inherit; |
|
|
|
/* |
|
* Now that we already used evsel->core.attr to ask the kernel to setup the |
|
* events, lets reuse evsel->core.attr.sample_max_stack as the limit in |
|
* trace__resolve_callchain(), allowing per-event max-stack settings |
|
* to override an explicitly set --max-stack global setting. |
|
*/ |
|
evlist__for_each_entry(evlist, evsel) { |
|
if (evsel__has_callchain(evsel) && |
|
evsel->core.attr.sample_max_stack == 0) |
|
evsel->core.attr.sample_max_stack = trace->max_stack; |
|
} |
|
again: |
|
before = trace->nr_events; |
|
|
|
for (i = 0; i < evlist->core.nr_mmaps; i++) { |
|
union perf_event *event; |
|
struct mmap *md; |
|
|
|
md = &evlist->mmap[i]; |
|
if (perf_mmap__read_init(&md->core) < 0) |
|
continue; |
|
|
|
while ((event = perf_mmap__read_event(&md->core)) != NULL) { |
|
++trace->nr_events; |
|
|
|
err = trace__deliver_event(trace, event); |
|
if (err) |
|
goto out_disable; |
|
|
|
perf_mmap__consume(&md->core); |
|
|
|
if (interrupted) |
|
goto out_disable; |
|
|
|
if (done && !draining) { |
|
evlist__disable(evlist); |
|
draining = true; |
|
} |
|
} |
|
perf_mmap__read_done(&md->core); |
|
} |
|
|
|
if (trace->nr_events == before) { |
|
int timeout = done ? 100 : -1; |
|
|
|
if (!draining && evlist__poll(evlist, timeout) > 0) { |
|
if (evlist__filter_pollfd(evlist, POLLERR | POLLHUP | POLLNVAL) == 0) |
|
draining = true; |
|
|
|
goto again; |
|
} else { |
|
if (trace__flush_events(trace)) |
|
goto out_disable; |
|
} |
|
} else { |
|
goto again; |
|
} |
|
|
|
out_disable: |
|
thread__zput(trace->current); |
|
|
|
evlist__disable(evlist); |
|
|
|
if (trace->sort_events) |
|
ordered_events__flush(&trace->oe.data, OE_FLUSH__FINAL); |
|
|
|
if (!err) { |
|
if (trace->summary) |
|
trace__fprintf_thread_summary(trace, trace->output); |
|
|
|
if (trace->show_tool_stats) { |
|
fprintf(trace->output, "Stats:\n " |
|
" vfs_getname : %" PRIu64 "\n" |
|
" proc_getname: %" PRIu64 "\n", |
|
trace->stats.vfs_getname, |
|
trace->stats.proc_getname); |
|
} |
|
} |
|
|
|
out_delete_evlist: |
|
trace__symbols__exit(trace); |
|
evlist__free_syscall_tp_fields(evlist); |
|
evlist__delete(evlist); |
|
cgroup__put(trace->cgroup); |
|
trace->evlist = NULL; |
|
trace->live = false; |
|
return err; |
|
{ |
|
char errbuf[BUFSIZ]; |
|
|
|
out_error_sched_stat_runtime: |
|
tracing_path__strerror_open_tp(errno, errbuf, sizeof(errbuf), "sched", "sched_stat_runtime"); |
|
goto out_error; |
|
|
|
out_error_raw_syscalls: |
|
tracing_path__strerror_open_tp(errno, errbuf, sizeof(errbuf), "raw_syscalls", "sys_(enter|exit)"); |
|
goto out_error; |
|
|
|
out_error_mmap: |
|
evlist__strerror_mmap(evlist, errno, errbuf, sizeof(errbuf)); |
|
goto out_error; |
|
|
|
out_error_open: |
|
evlist__strerror_open(evlist, errno, errbuf, sizeof(errbuf)); |
|
|
|
out_error: |
|
fprintf(trace->output, "%s\n", errbuf); |
|
goto out_delete_evlist; |
|
|
|
out_error_apply_filters: |
|
fprintf(trace->output, |
|
"Failed to set filter \"%s\" on event %s with %d (%s)\n", |
|
evsel->filter, evsel__name(evsel), errno, |
|
str_error_r(errno, errbuf, sizeof(errbuf))); |
|
goto out_delete_evlist; |
|
} |
|
out_error_mem: |
|
fprintf(trace->output, "Not enough memory to run!\n"); |
|
goto out_delete_evlist; |
|
|
|
out_errno: |
|
fprintf(trace->output, "errno=%d,%s\n", errno, strerror(errno)); |
|
goto out_delete_evlist; |
|
} |
|
|
|
static int trace__replay(struct trace *trace) |
|
{ |
|
const struct evsel_str_handler handlers[] = { |
|
{ "probe:vfs_getname", trace__vfs_getname, }, |
|
}; |
|
struct perf_data data = { |
|
.path = input_name, |
|
.mode = PERF_DATA_MODE_READ, |
|
.force = trace->force, |
|
}; |
|
struct perf_session *session; |
|
struct evsel *evsel; |
|
int err = -1; |
|
|
|
trace->tool.sample = trace__process_sample; |
|
trace->tool.mmap = perf_event__process_mmap; |
|
trace->tool.mmap2 = perf_event__process_mmap2; |
|
trace->tool.comm = perf_event__process_comm; |
|
trace->tool.exit = perf_event__process_exit; |
|
trace->tool.fork = perf_event__process_fork; |
|
trace->tool.attr = perf_event__process_attr; |
|
trace->tool.tracing_data = perf_event__process_tracing_data; |
|
trace->tool.build_id = perf_event__process_build_id; |
|
trace->tool.namespaces = perf_event__process_namespaces; |
|
|
|
trace->tool.ordered_events = true; |
|
trace->tool.ordering_requires_timestamps = true; |
|
|
|
/* add tid to output */ |
|
trace->multiple_threads = true; |
|
|
|
session = perf_session__new(&data, &trace->tool); |
|
if (IS_ERR(session)) |
|
return PTR_ERR(session); |
|
|
|
if (trace->opts.target.pid) |
|
symbol_conf.pid_list_str = strdup(trace->opts.target.pid); |
|
|
|
if (trace->opts.target.tid) |
|
symbol_conf.tid_list_str = strdup(trace->opts.target.tid); |
|
|
|
if (symbol__init(&session->header.env) < 0) |
|
goto out; |
|
|
|
trace->host = &session->machines.host; |
|
|
|
err = perf_session__set_tracepoints_handlers(session, handlers); |
|
if (err) |
|
goto out; |
|
|
|
evsel = evlist__find_tracepoint_by_name(session->evlist, "raw_syscalls:sys_enter"); |
|
trace->syscalls.events.sys_enter = evsel; |
|
/* older kernels have syscalls tp versus raw_syscalls */ |
|
if (evsel == NULL) |
|
evsel = evlist__find_tracepoint_by_name(session->evlist, "syscalls:sys_enter"); |
|
|
|
if (evsel && |
|
(evsel__init_raw_syscall_tp(evsel, trace__sys_enter) < 0 || |
|
perf_evsel__init_sc_tp_ptr_field(evsel, args))) { |
|
pr_err("Error during initialize raw_syscalls:sys_enter event\n"); |
|
goto out; |
|
} |
|
|
|
evsel = evlist__find_tracepoint_by_name(session->evlist, "raw_syscalls:sys_exit"); |
|
trace->syscalls.events.sys_exit = evsel; |
|
if (evsel == NULL) |
|
evsel = evlist__find_tracepoint_by_name(session->evlist, "syscalls:sys_exit"); |
|
if (evsel && |
|
(evsel__init_raw_syscall_tp(evsel, trace__sys_exit) < 0 || |
|
perf_evsel__init_sc_tp_uint_field(evsel, ret))) { |
|
pr_err("Error during initialize raw_syscalls:sys_exit event\n"); |
|
goto out; |
|
} |
|
|
|
evlist__for_each_entry(session->evlist, evsel) { |
|
if (evsel->core.attr.type == PERF_TYPE_SOFTWARE && |
|
(evsel->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS_MAJ || |
|
evsel->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS_MIN || |
|
evsel->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS)) |
|
evsel->handler = trace__pgfault; |
|
} |
|
|
|
setup_pager(); |
|
|
|
err = perf_session__process_events(session); |
|
if (err) |
|
pr_err("Failed to process events, error %d", err); |
|
|
|
else if (trace->summary) |
|
trace__fprintf_thread_summary(trace, trace->output); |
|
|
|
out: |
|
perf_session__delete(session); |
|
|
|
return err; |
|
} |
|
|
|
static size_t trace__fprintf_threads_header(FILE *fp) |
|
{ |
|
size_t printed; |
|
|
|
printed = fprintf(fp, "\n Summary of events:\n\n"); |
|
|
|
return printed; |
|
} |
|
|
|
DEFINE_RESORT_RB(syscall_stats, a->msecs > b->msecs, |
|
struct syscall_stats *stats; |
|
double msecs; |
|
int syscall; |
|
) |
|
{ |
|
struct int_node *source = rb_entry(nd, struct int_node, rb_node); |
|
struct syscall_stats *stats = source->priv; |
|
|
|
entry->syscall = source->i; |
|
entry->stats = stats; |
|
entry->msecs = stats ? (u64)stats->stats.n * (avg_stats(&stats->stats) / NSEC_PER_MSEC) : 0; |
|
} |
|
|
|
static size_t thread__dump_stats(struct thread_trace *ttrace, |
|
struct trace *trace, FILE *fp) |
|
{ |
|
size_t printed = 0; |
|
struct syscall *sc; |
|
struct rb_node *nd; |
|
DECLARE_RESORT_RB_INTLIST(syscall_stats, ttrace->syscall_stats); |
|
|
|
if (syscall_stats == NULL) |
|
return 0; |
|
|
|
printed += fprintf(fp, "\n"); |
|
|
|
printed += fprintf(fp, " syscall calls errors total min avg max stddev\n"); |
|
printed += fprintf(fp, " (msec) (msec) (msec) (msec) (%%)\n"); |
|
printed += fprintf(fp, " --------------- -------- ------ -------- --------- --------- --------- ------\n"); |
|
|
|
resort_rb__for_each_entry(nd, syscall_stats) { |
|
struct syscall_stats *stats = syscall_stats_entry->stats; |
|
if (stats) { |
|
double min = (double)(stats->stats.min) / NSEC_PER_MSEC; |
|
double max = (double)(stats->stats.max) / NSEC_PER_MSEC; |
|
double avg = avg_stats(&stats->stats); |
|
double pct; |
|
u64 n = (u64)stats->stats.n; |
|
|
|
pct = avg ? 100.0 * stddev_stats(&stats->stats) / avg : 0.0; |
|
avg /= NSEC_PER_MSEC; |
|
|
|
sc = &trace->syscalls.table[syscall_stats_entry->syscall]; |
|
printed += fprintf(fp, " %-15s", sc->name); |
|
printed += fprintf(fp, " %8" PRIu64 " %6" PRIu64 " %9.3f %9.3f %9.3f", |
|
n, stats->nr_failures, syscall_stats_entry->msecs, min, avg); |
|
printed += fprintf(fp, " %9.3f %9.2f%%\n", max, pct); |
|
|
|
if (trace->errno_summary && stats->nr_failures) { |
|
const char *arch_name = perf_env__arch(trace->host->env); |
|
int e; |
|
|
|
for (e = 0; e < stats->max_errno; ++e) { |
|
if (stats->errnos[e] != 0) |
|
fprintf(fp, "\t\t\t\t%s: %d\n", arch_syscalls__strerrno(arch_name, e + 1), stats->errnos[e]); |
|
} |
|
} |
|
} |
|
} |
|
|
|
resort_rb__delete(syscall_stats); |
|
printed += fprintf(fp, "\n\n"); |
|
|
|
return printed; |
|
} |
|
|
|
static size_t trace__fprintf_thread(FILE *fp, struct thread *thread, struct trace *trace) |
|
{ |
|
size_t printed = 0; |
|
struct thread_trace *ttrace = thread__priv(thread); |
|
double ratio; |
|
|
|
if (ttrace == NULL) |
|
return 0; |
|
|
|
ratio = (double)ttrace->nr_events / trace->nr_events * 100.0; |
|
|
|
printed += fprintf(fp, " %s (%d), ", thread__comm_str(thread), thread->tid); |
|
printed += fprintf(fp, "%lu events, ", ttrace->nr_events); |
|
printed += fprintf(fp, "%.1f%%", ratio); |
|
if (ttrace->pfmaj) |
|
printed += fprintf(fp, ", %lu majfaults", ttrace->pfmaj); |
|
if (ttrace->pfmin) |
|
printed += fprintf(fp, ", %lu minfaults", ttrace->pfmin); |
|
if (trace->sched) |
|
printed += fprintf(fp, ", %.3f msec\n", ttrace->runtime_ms); |
|
else if (fputc('\n', fp) != EOF) |
|
++printed; |
|
|
|
printed += thread__dump_stats(ttrace, trace, fp); |
|
|
|
return printed; |
|
} |
|
|
|
static unsigned long thread__nr_events(struct thread_trace *ttrace) |
|
{ |
|
return ttrace ? ttrace->nr_events : 0; |
|
} |
|
|
|
DEFINE_RESORT_RB(threads, (thread__nr_events(a->thread->priv) < thread__nr_events(b->thread->priv)), |
|
struct thread *thread; |
|
) |
|
{ |
|
entry->thread = rb_entry(nd, struct thread, rb_node); |
|
} |
|
|
|
static size_t trace__fprintf_thread_summary(struct trace *trace, FILE *fp) |
|
{ |
|
size_t printed = trace__fprintf_threads_header(fp); |
|
struct rb_node *nd; |
|
int i; |
|
|
|
for (i = 0; i < THREADS__TABLE_SIZE; i++) { |
|
DECLARE_RESORT_RB_MACHINE_THREADS(threads, trace->host, i); |
|
|
|
if (threads == NULL) { |
|
fprintf(fp, "%s", "Error sorting output by nr_events!\n"); |
|
return 0; |
|
} |
|
|
|
resort_rb__for_each_entry(nd, threads) |
|
printed += trace__fprintf_thread(fp, threads_entry->thread, trace); |
|
|
|
resort_rb__delete(threads); |
|
} |
|
return printed; |
|
} |
|
|
|
static int trace__set_duration(const struct option *opt, const char *str, |
|
int unset __maybe_unused) |
|
{ |
|
struct trace *trace = opt->value; |
|
|
|
trace->duration_filter = atof(str); |
|
return 0; |
|
} |
|
|
|
static int trace__set_filter_pids_from_option(const struct option *opt, const char *str, |
|
int unset __maybe_unused) |
|
{ |
|
int ret = -1; |
|
size_t i; |
|
struct trace *trace = opt->value; |
|
/* |
|
* FIXME: introduce a intarray class, plain parse csv and create a |
|
* { int nr, int entries[] } struct... |
|
*/ |
|
struct intlist *list = intlist__new(str); |
|
|
|
if (list == NULL) |
|
return -1; |
|
|
|
i = trace->filter_pids.nr = intlist__nr_entries(list) + 1; |
|
trace->filter_pids.entries = calloc(i, sizeof(pid_t)); |
|
|
|
if (trace->filter_pids.entries == NULL) |
|
goto out; |
|
|
|
trace->filter_pids.entries[0] = getpid(); |
|
|
|
for (i = 1; i < trace->filter_pids.nr; ++i) |
|
trace->filter_pids.entries[i] = intlist__entry(list, i - 1)->i; |
|
|
|
intlist__delete(list); |
|
ret = 0; |
|
out: |
|
return ret; |
|
} |
|
|
|
static int trace__open_output(struct trace *trace, const char *filename) |
|
{ |
|
struct stat st; |
|
|
|
if (!stat(filename, &st) && st.st_size) { |
|
char oldname[PATH_MAX]; |
|
|
|
scnprintf(oldname, sizeof(oldname), "%s.old", filename); |
|
unlink(oldname); |
|
rename(filename, oldname); |
|
} |
|
|
|
trace->output = fopen(filename, "w"); |
|
|
|
return trace->output == NULL ? -errno : 0; |
|
} |
|
|
|
static int parse_pagefaults(const struct option *opt, const char *str, |
|
int unset __maybe_unused) |
|
{ |
|
int *trace_pgfaults = opt->value; |
|
|
|
if (strcmp(str, "all") == 0) |
|
*trace_pgfaults |= TRACE_PFMAJ | TRACE_PFMIN; |
|
else if (strcmp(str, "maj") == 0) |
|
*trace_pgfaults |= TRACE_PFMAJ; |
|
else if (strcmp(str, "min") == 0) |
|
*trace_pgfaults |= TRACE_PFMIN; |
|
else |
|
return -1; |
|
|
|
return 0; |
|
} |
|
|
|
static void evlist__set_default_evsel_handler(struct evlist *evlist, void *handler) |
|
{ |
|
struct evsel *evsel; |
|
|
|
evlist__for_each_entry(evlist, evsel) { |
|
if (evsel->handler == NULL) |
|
evsel->handler = handler; |
|
} |
|
} |
|
|
|
static void evsel__set_syscall_arg_fmt(struct evsel *evsel, const char *name) |
|
{ |
|
struct syscall_arg_fmt *fmt = evsel__syscall_arg_fmt(evsel); |
|
|
|
if (fmt) { |
|
struct syscall_fmt *scfmt = syscall_fmt__find(name); |
|
|
|
if (scfmt) { |
|
int skip = 0; |
|
|
|
if (strcmp(evsel->tp_format->format.fields->name, "__syscall_nr") == 0 || |
|
strcmp(evsel->tp_format->format.fields->name, "nr") == 0) |
|
++skip; |
|
|
|
memcpy(fmt + skip, scfmt->arg, (evsel->tp_format->format.nr_fields - skip) * sizeof(*fmt)); |
|
} |
|
} |
|
} |
|
|
|
static int evlist__set_syscall_tp_fields(struct evlist *evlist) |
|
{ |
|
struct evsel *evsel; |
|
|
|
evlist__for_each_entry(evlist, evsel) { |
|
if (evsel->priv || !evsel->tp_format) |
|
continue; |
|
|
|
if (strcmp(evsel->tp_format->system, "syscalls")) { |
|
evsel__init_tp_arg_scnprintf(evsel); |
|
continue; |
|
} |
|
|
|
if (evsel__init_syscall_tp(evsel)) |
|
return -1; |
|
|
|
if (!strncmp(evsel->tp_format->name, "sys_enter_", 10)) { |
|
struct syscall_tp *sc = __evsel__syscall_tp(evsel); |
|
|
|
if (__tp_field__init_ptr(&sc->args, sc->id.offset + sizeof(u64))) |
|
return -1; |
|
|
|
evsel__set_syscall_arg_fmt(evsel, evsel->tp_format->name + sizeof("sys_enter_") - 1); |
|
} else if (!strncmp(evsel->tp_format->name, "sys_exit_", 9)) { |
|
struct syscall_tp *sc = __evsel__syscall_tp(evsel); |
|
|
|
if (__tp_field__init_uint(&sc->ret, sizeof(u64), sc->id.offset + sizeof(u64), evsel->needs_swap)) |
|
return -1; |
|
|
|
evsel__set_syscall_arg_fmt(evsel, evsel->tp_format->name + sizeof("sys_exit_") - 1); |
|
} |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
/* |
|
* XXX: Hackish, just splitting the combined -e+--event (syscalls |
|
* (raw_syscalls:{sys_{enter,exit}} + events (tracepoints, HW, SW, etc) to use |
|
* existing facilities unchanged (trace->ev_qualifier + parse_options()). |
|
* |
|
* It'd be better to introduce a parse_options() variant that would return a |
|
* list with the terms it didn't match to an event... |
|
*/ |
|
static int trace__parse_events_option(const struct option *opt, const char *str, |
|
int unset __maybe_unused) |
|
{ |
|
struct trace *trace = (struct trace *)opt->value; |
|
const char *s = str; |
|
char *sep = NULL, *lists[2] = { NULL, NULL, }; |
|
int len = strlen(str) + 1, err = -1, list, idx; |
|
char *strace_groups_dir = system_path(STRACE_GROUPS_DIR); |
|
char group_name[PATH_MAX]; |
|
struct syscall_fmt *fmt; |
|
|
|
if (strace_groups_dir == NULL) |
|
return -1; |
|
|
|
if (*s == '!') { |
|
++s; |
|
trace->not_ev_qualifier = true; |
|
} |
|
|
|
while (1) { |
|
if ((sep = strchr(s, ',')) != NULL) |
|
*sep = '\0'; |
|
|
|
list = 0; |
|
if (syscalltbl__id(trace->sctbl, s) >= 0 || |
|
syscalltbl__strglobmatch_first(trace->sctbl, s, &idx) >= 0) { |
|
list = 1; |
|
goto do_concat; |
|
} |
|
|
|
fmt = syscall_fmt__find_by_alias(s); |
|
if (fmt != NULL) { |
|
list = 1; |
|
s = fmt->name; |
|
} else { |
|
path__join(group_name, sizeof(group_name), strace_groups_dir, s); |
|
if (access(group_name, R_OK) == 0) |
|
list = 1; |
|
} |
|
do_concat: |
|
if (lists[list]) { |
|
sprintf(lists[list] + strlen(lists[list]), ",%s", s); |
|
} else { |
|
lists[list] = malloc(len); |
|
if (lists[list] == NULL) |
|
goto out; |
|
strcpy(lists[list], s); |
|
} |
|
|
|
if (!sep) |
|
break; |
|
|
|
*sep = ','; |
|
s = sep + 1; |
|
} |
|
|
|
if (lists[1] != NULL) { |
|
struct strlist_config slist_config = { |
|
.dirname = strace_groups_dir, |
|
}; |
|
|
|
trace->ev_qualifier = strlist__new(lists[1], &slist_config); |
|
if (trace->ev_qualifier == NULL) { |
|
fputs("Not enough memory to parse event qualifier", trace->output); |
|
goto out; |
|
} |
|
|
|
if (trace__validate_ev_qualifier(trace)) |
|
goto out; |
|
trace->trace_syscalls = true; |
|
} |
|
|
|
err = 0; |
|
|
|
if (lists[0]) { |
|
struct option o = { |
|
.value = &trace->evlist, |
|
}; |
|
err = parse_events_option(&o, lists[0], 0); |
|
} |
|
out: |
|
free(strace_groups_dir); |
|
free(lists[0]); |
|
free(lists[1]); |
|
if (sep) |
|
*sep = ','; |
|
|
|
return err; |
|
} |
|
|
|
static int trace__parse_cgroups(const struct option *opt, const char *str, int unset) |
|
{ |
|
struct trace *trace = opt->value; |
|
|
|
if (!list_empty(&trace->evlist->core.entries)) { |
|
struct option o = { |
|
.value = &trace->evlist, |
|
}; |
|
return parse_cgroups(&o, str, unset); |
|
} |
|
trace->cgroup = evlist__findnew_cgroup(trace->evlist, str); |
|
|
|
return 0; |
|
} |
|
|
|
static int trace__config(const char *var, const char *value, void *arg) |
|
{ |
|
struct trace *trace = arg; |
|
int err = 0; |
|
|
|
if (!strcmp(var, "trace.add_events")) { |
|
trace->perfconfig_events = strdup(value); |
|
if (trace->perfconfig_events == NULL) { |
|
pr_err("Not enough memory for %s\n", "trace.add_events"); |
|
return -1; |
|
} |
|
} else if (!strcmp(var, "trace.show_timestamp")) { |
|
trace->show_tstamp = perf_config_bool(var, value); |
|
} else if (!strcmp(var, "trace.show_duration")) { |
|
trace->show_duration = perf_config_bool(var, value); |
|
} else if (!strcmp(var, "trace.show_arg_names")) { |
|
trace->show_arg_names = perf_config_bool(var, value); |
|
if (!trace->show_arg_names) |
|
trace->show_zeros = true; |
|
} else if (!strcmp(var, "trace.show_zeros")) { |
|
bool new_show_zeros = perf_config_bool(var, value); |
|
if (!trace->show_arg_names && !new_show_zeros) { |
|
pr_warning("trace.show_zeros has to be set when trace.show_arg_names=no\n"); |
|
goto out; |
|
} |
|
trace->show_zeros = new_show_zeros; |
|
} else if (!strcmp(var, "trace.show_prefix")) { |
|
trace->show_string_prefix = perf_config_bool(var, value); |
|
} else if (!strcmp(var, "trace.no_inherit")) { |
|
trace->opts.no_inherit = perf_config_bool(var, value); |
|
} else if (!strcmp(var, "trace.args_alignment")) { |
|
int args_alignment = 0; |
|
if (perf_config_int(&args_alignment, var, value) == 0) |
|
trace->args_alignment = args_alignment; |
|
} else if (!strcmp(var, "trace.tracepoint_beautifiers")) { |
|
if (strcasecmp(value, "libtraceevent") == 0) |
|
trace->libtraceevent_print = true; |
|
else if (strcasecmp(value, "libbeauty") == 0) |
|
trace->libtraceevent_print = false; |
|
} |
|
out: |
|
return err; |
|
} |
|
|
|
static void trace__exit(struct trace *trace) |
|
{ |
|
int i; |
|
|
|
strlist__delete(trace->ev_qualifier); |
|
free(trace->ev_qualifier_ids.entries); |
|
if (trace->syscalls.table) { |
|
for (i = 0; i <= trace->sctbl->syscalls.max_id; i++) |
|
syscall__exit(&trace->syscalls.table[i]); |
|
free(trace->syscalls.table); |
|
} |
|
syscalltbl__delete(trace->sctbl); |
|
zfree(&trace->perfconfig_events); |
|
} |
|
|
|
int cmd_trace(int argc, const char **argv) |
|
{ |
|
const char *trace_usage[] = { |
|
"perf trace [<options>] [<command>]", |
|
"perf trace [<options>] -- <command> [<options>]", |
|
"perf trace record [<options>] [<command>]", |
|
"perf trace record [<options>] -- <command> [<options>]", |
|
NULL |
|
}; |
|
struct trace trace = { |
|
.opts = { |
|
.target = { |
|
.uid = UINT_MAX, |
|
.uses_mmap = true, |
|
}, |
|
.user_freq = UINT_MAX, |
|
.user_interval = ULLONG_MAX, |
|
.no_buffering = true, |
|
.mmap_pages = UINT_MAX, |
|
}, |
|
.output = stderr, |
|
.show_comm = true, |
|
.show_tstamp = true, |
|
.show_duration = true, |
|
.show_arg_names = true, |
|
.args_alignment = 70, |
|
.trace_syscalls = false, |
|
.kernel_syscallchains = false, |
|
.max_stack = UINT_MAX, |
|
.max_events = ULONG_MAX, |
|
}; |
|
const char *map_dump_str = NULL; |
|
const char *output_name = NULL; |
|
const struct option trace_options[] = { |
|
OPT_CALLBACK('e', "event", &trace, "event", |
|
"event/syscall selector. use 'perf list' to list available events", |
|
trace__parse_events_option), |
|
OPT_CALLBACK(0, "filter", &trace.evlist, "filter", |
|
"event filter", parse_filter), |
|
OPT_BOOLEAN(0, "comm", &trace.show_comm, |
|
"show the thread COMM next to its id"), |
|
OPT_BOOLEAN(0, "tool_stats", &trace.show_tool_stats, "show tool stats"), |
|
OPT_CALLBACK(0, "expr", &trace, "expr", "list of syscalls/events to trace", |
|
trace__parse_events_option), |
|
OPT_STRING('o', "output", &output_name, "file", "output file name"), |
|
OPT_STRING('i', "input", &input_name, "file", "Analyze events in file"), |
|
OPT_STRING('p', "pid", &trace.opts.target.pid, "pid", |
|
"trace events on existing process id"), |
|
OPT_STRING('t', "tid", &trace.opts.target.tid, "tid", |
|
"trace events on existing thread id"), |
|
OPT_CALLBACK(0, "filter-pids", &trace, "CSV list of pids", |
|
"pids to filter (by the kernel)", trace__set_filter_pids_from_option), |
|
OPT_BOOLEAN('a', "all-cpus", &trace.opts.target.system_wide, |
|
"system-wide collection from all CPUs"), |
|
OPT_STRING('C', "cpu", &trace.opts.target.cpu_list, "cpu", |
|
"list of cpus to monitor"), |
|
OPT_BOOLEAN(0, "no-inherit", &trace.opts.no_inherit, |
|
"child tasks do not inherit counters"), |
|
OPT_CALLBACK('m', "mmap-pages", &trace.opts.mmap_pages, "pages", |
|
"number of mmap data pages", evlist__parse_mmap_pages), |
|
OPT_STRING('u', "uid", &trace.opts.target.uid_str, "user", |
|
"user to profile"), |
|
OPT_CALLBACK(0, "duration", &trace, "float", |
|
"show only events with duration > N.M ms", |
|
trace__set_duration), |
|
#ifdef HAVE_LIBBPF_SUPPORT |
|
OPT_STRING(0, "map-dump", &map_dump_str, "BPF map", "BPF map to periodically dump"), |
|
#endif |
|
OPT_BOOLEAN(0, "sched", &trace.sched, "show blocking scheduler events"), |
|
OPT_INCR('v', "verbose", &verbose, "be more verbose"), |
|
OPT_BOOLEAN('T', "time", &trace.full_time, |
|
"Show full timestamp, not time relative to first start"), |
|
OPT_BOOLEAN(0, "failure", &trace.failure_only, |
|
"Show only syscalls that failed"), |
|
OPT_BOOLEAN('s', "summary", &trace.summary_only, |
|
"Show only syscall summary with statistics"), |
|
OPT_BOOLEAN('S', "with-summary", &trace.summary, |
|
"Show all syscalls and summary with statistics"), |
|
OPT_BOOLEAN(0, "errno-summary", &trace.errno_summary, |
|
"Show errno stats per syscall, use with -s or -S"), |
|
OPT_CALLBACK_DEFAULT('F', "pf", &trace.trace_pgfaults, "all|maj|min", |
|
"Trace pagefaults", parse_pagefaults, "maj"), |
|
OPT_BOOLEAN(0, "syscalls", &trace.trace_syscalls, "Trace syscalls"), |
|
OPT_BOOLEAN('f', "force", &trace.force, "don't complain, do it"), |
|
OPT_CALLBACK(0, "call-graph", &trace.opts, |
|
"record_mode[,record_size]", record_callchain_help, |
|
&record_parse_callchain_opt), |
|
OPT_BOOLEAN(0, "libtraceevent_print", &trace.libtraceevent_print, |
|
"Use libtraceevent to print the tracepoint arguments."), |
|
OPT_BOOLEAN(0, "kernel-syscall-graph", &trace.kernel_syscallchains, |
|
"Show the kernel callchains on the syscall exit path"), |
|
OPT_ULONG(0, "max-events", &trace.max_events, |
|
"Set the maximum number of events to print, exit after that is reached. "), |
|
OPT_UINTEGER(0, "min-stack", &trace.min_stack, |
|
"Set the minimum stack depth when parsing the callchain, " |
|
"anything below the specified depth will be ignored."), |
|
OPT_UINTEGER(0, "max-stack", &trace.max_stack, |
|
"Set the maximum stack depth when parsing the callchain, " |
|
"anything beyond the specified depth will be ignored. " |
|
"Default: kernel.perf_event_max_stack or " __stringify(PERF_MAX_STACK_DEPTH)), |
|
OPT_BOOLEAN(0, "sort-events", &trace.sort_events, |
|
"Sort batch of events before processing, use if getting out of order events"), |
|
OPT_BOOLEAN(0, "print-sample", &trace.print_sample, |
|
"print the PERF_RECORD_SAMPLE PERF_SAMPLE_ info, for debugging"), |
|
OPT_UINTEGER(0, "proc-map-timeout", &proc_map_timeout, |
|
"per thread proc mmap processing timeout in ms"), |
|
OPT_CALLBACK('G', "cgroup", &trace, "name", "monitor event in cgroup name only", |
|
trace__parse_cgroups), |
|
OPT_INTEGER('D', "delay", &trace.opts.initial_delay, |
|
"ms to wait before starting measurement after program " |
|
"start"), |
|
OPTS_EVSWITCH(&trace.evswitch), |
|
OPT_END() |
|
}; |
|
bool __maybe_unused max_stack_user_set = true; |
|
bool mmap_pages_user_set = true; |
|
struct evsel *evsel; |
|
const char * const trace_subcommands[] = { "record", NULL }; |
|
int err = -1; |
|
char bf[BUFSIZ]; |
|
struct sigaction sigchld_act; |
|
|
|
signal(SIGSEGV, sighandler_dump_stack); |
|
signal(SIGFPE, sighandler_dump_stack); |
|
signal(SIGINT, sighandler_interrupt); |
|
|
|
memset(&sigchld_act, 0, sizeof(sigchld_act)); |
|
sigchld_act.sa_flags = SA_SIGINFO; |
|
sigchld_act.sa_sigaction = sighandler_chld; |
|
sigaction(SIGCHLD, &sigchld_act, NULL); |
|
|
|
trace.evlist = evlist__new(); |
|
trace.sctbl = syscalltbl__new(); |
|
|
|
if (trace.evlist == NULL || trace.sctbl == NULL) { |
|
pr_err("Not enough memory to run!\n"); |
|
err = -ENOMEM; |
|
goto out; |
|
} |
|
|
|
/* |
|
* Parsing .perfconfig may entail creating a BPF event, that may need |
|
* to create BPF maps, so bump RLIM_MEMLOCK as the default 64K setting |
|
* is too small. This affects just this process, not touching the |
|
* global setting. If it fails we'll get something in 'perf trace -v' |
|
* to help diagnose the problem. |
|
*/ |
|
rlimit__bump_memlock(); |
|
|
|
err = perf_config(trace__config, &trace); |
|
if (err) |
|
goto out; |
|
|
|
argc = parse_options_subcommand(argc, argv, trace_options, trace_subcommands, |
|
trace_usage, PARSE_OPT_STOP_AT_NON_OPTION); |
|
|
|
/* |
|
* Here we already passed thru trace__parse_events_option() and it has |
|
* already figured out if -e syscall_name, if not but if --event |
|
* foo:bar was used, the user is interested _just_ in those, say, |
|
* tracepoint events, not in the strace-like syscall-name-based mode. |
|
* |
|
* This is important because we need to check if strace-like mode is |
|
* needed to decided if we should filter out the eBPF |
|
* __augmented_syscalls__ code, if it is in the mix, say, via |
|
* .perfconfig trace.add_events, and filter those out. |
|
*/ |
|
if (!trace.trace_syscalls && !trace.trace_pgfaults && |
|
trace.evlist->core.nr_entries == 0 /* Was --events used? */) { |
|
trace.trace_syscalls = true; |
|
} |
|
/* |
|
* Now that we have --verbose figured out, lets see if we need to parse |
|
* events from .perfconfig, so that if those events fail parsing, say some |
|
* BPF program fails, then we'll be able to use --verbose to see what went |
|
* wrong in more detail. |
|
*/ |
|
if (trace.perfconfig_events != NULL) { |
|
struct parse_events_error parse_err; |
|
|
|
parse_events_error__init(&parse_err); |
|
err = parse_events(trace.evlist, trace.perfconfig_events, &parse_err); |
|
if (err) |
|
parse_events_error__print(&parse_err, trace.perfconfig_events); |
|
parse_events_error__exit(&parse_err); |
|
if (err) |
|
goto out; |
|
} |
|
|
|
if ((nr_cgroups || trace.cgroup) && !trace.opts.target.system_wide) { |
|
usage_with_options_msg(trace_usage, trace_options, |
|
"cgroup monitoring only available in system-wide mode"); |
|
} |
|
|
|
evsel = bpf__setup_output_event(trace.evlist, "__augmented_syscalls__"); |
|
if (IS_ERR(evsel)) { |
|
bpf__strerror_setup_output_event(trace.evlist, PTR_ERR(evsel), bf, sizeof(bf)); |
|
pr_err("ERROR: Setup trace syscalls enter failed: %s\n", bf); |
|
goto out; |
|
} |
|
|
|
if (evsel) { |
|
trace.syscalls.events.augmented = evsel; |
|
|
|
evsel = evlist__find_tracepoint_by_name(trace.evlist, "raw_syscalls:sys_enter"); |
|
if (evsel == NULL) { |
|
pr_err("ERROR: raw_syscalls:sys_enter not found in the augmented BPF object\n"); |
|
goto out; |
|
} |
|
|
|
if (evsel->bpf_obj == NULL) { |
|
pr_err("ERROR: raw_syscalls:sys_enter not associated to a BPF object\n"); |
|
goto out; |
|
} |
|
|
|
trace.bpf_obj = evsel->bpf_obj; |
|
|
|
/* |
|
* If we have _just_ the augmenter event but don't have a |
|
* explicit --syscalls, then assume we want all strace-like |
|
* syscalls: |
|
*/ |
|
if (!trace.trace_syscalls && trace__only_augmented_syscalls_evsels(&trace)) |
|
trace.trace_syscalls = true; |
|
/* |
|
* So, if we have a syscall augmenter, but trace_syscalls, aka |
|
* strace-like syscall tracing is not set, then we need to trow |
|
* away the augmenter, i.e. all the events that were created |
|
* from that BPF object file. |
|
* |
|
* This is more to fix the current .perfconfig trace.add_events |
|
* style of setting up the strace-like eBPF based syscall point |
|
* payload augmenter. |
|
* |
|
* All this complexity will be avoided by adding an alternative |
|
* to trace.add_events in the form of |
|
* trace.bpf_augmented_syscalls, that will be only parsed if we |
|
* need it. |
|
* |
|
* .perfconfig trace.add_events is still useful if we want, for |
|
* instance, have msr_write.msr in some .perfconfig profile based |
|
* 'perf trace --config determinism.profile' mode, where for some |
|
* particular goal/workload type we want a set of events and |
|
* output mode (with timings, etc) instead of having to add |
|
* all via the command line. |
|
* |
|
* Also --config to specify an alternate .perfconfig file needs |
|
* to be implemented. |
|
*/ |
|
if (!trace.trace_syscalls) { |
|
trace__delete_augmented_syscalls(&trace); |
|
} else { |
|
trace__set_bpf_map_filtered_pids(&trace); |
|
trace__set_bpf_map_syscalls(&trace); |
|
trace.syscalls.unaugmented_prog = trace__find_bpf_program_by_title(&trace, "!raw_syscalls:unaugmented"); |
|
} |
|
} |
|
|
|
err = bpf__setup_stdout(trace.evlist); |
|
if (err) { |
|
bpf__strerror_setup_stdout(trace.evlist, err, bf, sizeof(bf)); |
|
pr_err("ERROR: Setup BPF stdout failed: %s\n", bf); |
|
goto out; |
|
} |
|
|
|
err = -1; |
|
|
|
if (map_dump_str) { |
|
trace.dump.map = trace__find_bpf_map_by_name(&trace, map_dump_str); |
|
if (trace.dump.map == NULL) { |
|
pr_err("ERROR: BPF map \"%s\" not found\n", map_dump_str); |
|
goto out; |
|
} |
|
} |
|
|
|
if (trace.trace_pgfaults) { |
|
trace.opts.sample_address = true; |
|
trace.opts.sample_time = true; |
|
} |
|
|
|
if (trace.opts.mmap_pages == UINT_MAX) |
|
mmap_pages_user_set = false; |
|
|
|
if (trace.max_stack == UINT_MAX) { |
|
trace.max_stack = input_name ? PERF_MAX_STACK_DEPTH : sysctl__max_stack(); |
|
max_stack_user_set = false; |
|
} |
|
|
|
#ifdef HAVE_DWARF_UNWIND_SUPPORT |
|
if ((trace.min_stack || max_stack_user_set) && !callchain_param.enabled) { |
|
record_opts__parse_callchain(&trace.opts, &callchain_param, "dwarf", false); |
|
} |
|
#endif |
|
|
|
if (callchain_param.enabled) { |
|
if (!mmap_pages_user_set && geteuid() == 0) |
|
trace.opts.mmap_pages = perf_event_mlock_kb_in_pages() * 4; |
|
|
|
symbol_conf.use_callchain = true; |
|
} |
|
|
|
if (trace.evlist->core.nr_entries > 0) { |
|
evlist__set_default_evsel_handler(trace.evlist, trace__event_handler); |
|
if (evlist__set_syscall_tp_fields(trace.evlist)) { |
|
perror("failed to set syscalls:* tracepoint fields"); |
|
goto out; |
|
} |
|
} |
|
|
|
if (trace.sort_events) { |
|
ordered_events__init(&trace.oe.data, ordered_events__deliver_event, &trace); |
|
ordered_events__set_copy_on_queue(&trace.oe.data, true); |
|
} |
|
|
|
/* |
|
* If we are augmenting syscalls, then combine what we put in the |
|
* __augmented_syscalls__ BPF map with what is in the |
|
* syscalls:sys_exit_FOO tracepoints, i.e. just like we do without BPF, |
|
* combining raw_syscalls:sys_enter with raw_syscalls:sys_exit. |
|
* |
|
* We'll switch to look at two BPF maps, one for sys_enter and the |
|
* other for sys_exit when we start augmenting the sys_exit paths with |
|
* buffers that are being copied from kernel to userspace, think 'read' |
|
* syscall. |
|
*/ |
|
if (trace.syscalls.events.augmented) { |
|
evlist__for_each_entry(trace.evlist, evsel) { |
|
bool raw_syscalls_sys_exit = strcmp(evsel__name(evsel), "raw_syscalls:sys_exit") == 0; |
|
|
|
if (raw_syscalls_sys_exit) { |
|
trace.raw_augmented_syscalls = true; |
|
goto init_augmented_syscall_tp; |
|
} |
|
|
|
if (trace.syscalls.events.augmented->priv == NULL && |
|
strstr(evsel__name(evsel), "syscalls:sys_enter")) { |
|
struct evsel *augmented = trace.syscalls.events.augmented; |
|
if (evsel__init_augmented_syscall_tp(augmented, evsel) || |
|
evsel__init_augmented_syscall_tp_args(augmented)) |
|
goto out; |
|
/* |
|
* Augmented is __augmented_syscalls__ BPF_OUTPUT event |
|
* Above we made sure we can get from the payload the tp fields |
|
* that we get from syscalls:sys_enter tracefs format file. |
|
*/ |
|
augmented->handler = trace__sys_enter; |
|
/* |
|
* Now we do the same for the *syscalls:sys_enter event so that |
|
* if we handle it directly, i.e. if the BPF prog returns 0 so |
|
* as not to filter it, then we'll handle it just like we would |
|
* for the BPF_OUTPUT one: |
|
*/ |
|
if (evsel__init_augmented_syscall_tp(evsel, evsel) || |
|
evsel__init_augmented_syscall_tp_args(evsel)) |
|
goto out; |
|
evsel->handler = trace__sys_enter; |
|
} |
|
|
|
if (strstarts(evsel__name(evsel), "syscalls:sys_exit_")) { |
|
struct syscall_tp *sc; |
|
init_augmented_syscall_tp: |
|
if (evsel__init_augmented_syscall_tp(evsel, evsel)) |
|
goto out; |
|
sc = __evsel__syscall_tp(evsel); |
|
/* |
|
* For now with BPF raw_augmented we hook into |
|
* raw_syscalls:sys_enter and there we get all |
|
* 6 syscall args plus the tracepoint common |
|
* fields and the syscall_nr (another long). |
|
* So we check if that is the case and if so |
|
* don't look after the sc->args_size but |
|
* always after the full raw_syscalls:sys_enter |
|
* payload, which is fixed. |
|
* |
|
* We'll revisit this later to pass |
|
* s->args_size to the BPF augmenter (now |
|
* tools/perf/examples/bpf/augmented_raw_syscalls.c, |
|
* so that it copies only what we need for each |
|
* syscall, like what happens when we use |
|
* syscalls:sys_enter_NAME, so that we reduce |
|
* the kernel/userspace traffic to just what is |
|
* needed for each syscall. |
|
*/ |
|
if (trace.raw_augmented_syscalls) |
|
trace.raw_augmented_syscalls_args_size = (6 + 1) * sizeof(long) + sc->id.offset; |
|
evsel__init_augmented_syscall_tp_ret(evsel); |
|
evsel->handler = trace__sys_exit; |
|
} |
|
} |
|
} |
|
|
|
if ((argc >= 1) && (strcmp(argv[0], "record") == 0)) |
|
return trace__record(&trace, argc-1, &argv[1]); |
|
|
|
/* Using just --errno-summary will trigger --summary */ |
|
if (trace.errno_summary && !trace.summary && !trace.summary_only) |
|
trace.summary_only = true; |
|
|
|
/* summary_only implies summary option, but don't overwrite summary if set */ |
|
if (trace.summary_only) |
|
trace.summary = trace.summary_only; |
|
|
|
if (output_name != NULL) { |
|
err = trace__open_output(&trace, output_name); |
|
if (err < 0) { |
|
perror("failed to create output file"); |
|
goto out; |
|
} |
|
} |
|
|
|
err = evswitch__init(&trace.evswitch, trace.evlist, stderr); |
|
if (err) |
|
goto out_close; |
|
|
|
err = target__validate(&trace.opts.target); |
|
if (err) { |
|
target__strerror(&trace.opts.target, err, bf, sizeof(bf)); |
|
fprintf(trace.output, "%s", bf); |
|
goto out_close; |
|
} |
|
|
|
err = target__parse_uid(&trace.opts.target); |
|
if (err) { |
|
target__strerror(&trace.opts.target, err, bf, sizeof(bf)); |
|
fprintf(trace.output, "%s", bf); |
|
goto out_close; |
|
} |
|
|
|
if (!argc && target__none(&trace.opts.target)) |
|
trace.opts.target.system_wide = true; |
|
|
|
if (input_name) |
|
err = trace__replay(&trace); |
|
else |
|
err = trace__run(&trace, argc, argv); |
|
|
|
out_close: |
|
if (output_name != NULL) |
|
fclose(trace.output); |
|
out: |
|
trace__exit(&trace); |
|
return err; |
|
}
|
|
|