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2232 lines
53 KiB
2232 lines
53 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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#include "util/cgroup.h" |
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#include "util/data.h" |
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#include "util/debug.h" |
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#include "util/dso.h" |
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#include "util/event.h" |
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#include "util/evlist.h" |
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#include "util/machine.h" |
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#include "util/map.h" |
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#include "util/map_symbol.h" |
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#include "util/branch.h" |
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#include "util/memswap.h" |
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#include "util/namespaces.h" |
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#include "util/session.h" |
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#include "util/stat.h" |
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#include "util/symbol.h" |
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#include "util/synthetic-events.h" |
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#include "util/target.h" |
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#include "util/time-utils.h" |
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#include <linux/bitops.h> |
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#include <linux/kernel.h> |
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#include <linux/string.h> |
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#include <linux/zalloc.h> |
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#include <linux/perf_event.h> |
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#include <asm/bug.h> |
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#include <perf/evsel.h> |
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#include <perf/cpumap.h> |
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#include <internal/lib.h> // page_size |
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#include <internal/threadmap.h> |
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#include <perf/threadmap.h> |
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#include <symbol/kallsyms.h> |
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#include <dirent.h> |
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#include <errno.h> |
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#include <inttypes.h> |
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#include <stdio.h> |
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#include <string.h> |
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#include <uapi/linux/mman.h> /* To get things like MAP_HUGETLB even on older libc headers */ |
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#include <api/fs/fs.h> |
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#include <api/io.h> |
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#include <sys/types.h> |
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#include <sys/stat.h> |
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#include <fcntl.h> |
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#include <unistd.h> |
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#define DEFAULT_PROC_MAP_PARSE_TIMEOUT 500 |
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unsigned int proc_map_timeout = DEFAULT_PROC_MAP_PARSE_TIMEOUT; |
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int perf_tool__process_synth_event(struct perf_tool *tool, |
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union perf_event *event, |
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struct machine *machine, |
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perf_event__handler_t process) |
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{ |
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struct perf_sample synth_sample = { |
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.pid = -1, |
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.tid = -1, |
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.time = -1, |
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.stream_id = -1, |
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.cpu = -1, |
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.period = 1, |
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.cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK, |
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}; |
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return process(tool, event, &synth_sample, machine); |
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}; |
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/* |
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* Assumes that the first 4095 bytes of /proc/pid/stat contains |
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* the comm, tgid and ppid. |
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*/ |
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static int perf_event__get_comm_ids(pid_t pid, pid_t tid, char *comm, size_t len, |
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pid_t *tgid, pid_t *ppid, bool *kernel) |
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{ |
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char bf[4096]; |
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int fd; |
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size_t size = 0; |
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ssize_t n; |
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char *name, *tgids, *ppids, *vmpeak, *threads; |
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*tgid = -1; |
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*ppid = -1; |
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if (pid) |
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snprintf(bf, sizeof(bf), "/proc/%d/task/%d/status", pid, tid); |
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else |
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snprintf(bf, sizeof(bf), "/proc/%d/status", tid); |
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fd = open(bf, O_RDONLY); |
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if (fd < 0) { |
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pr_debug("couldn't open %s\n", bf); |
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return -1; |
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} |
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n = read(fd, bf, sizeof(bf) - 1); |
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close(fd); |
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if (n <= 0) { |
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pr_warning("Couldn't get COMM, tigd and ppid for pid %d\n", |
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tid); |
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return -1; |
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} |
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bf[n] = '\0'; |
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name = strstr(bf, "Name:"); |
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tgids = strstr(name ?: bf, "Tgid:"); |
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ppids = strstr(tgids ?: bf, "PPid:"); |
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vmpeak = strstr(ppids ?: bf, "VmPeak:"); |
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if (vmpeak) |
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threads = NULL; |
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else |
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threads = strstr(ppids ?: bf, "Threads:"); |
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if (name) { |
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char *nl; |
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name = skip_spaces(name + 5); /* strlen("Name:") */ |
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nl = strchr(name, '\n'); |
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if (nl) |
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*nl = '\0'; |
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size = strlen(name); |
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if (size >= len) |
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size = len - 1; |
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memcpy(comm, name, size); |
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comm[size] = '\0'; |
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} else { |
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pr_debug("Name: string not found for pid %d\n", tid); |
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} |
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if (tgids) { |
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tgids += 5; /* strlen("Tgid:") */ |
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*tgid = atoi(tgids); |
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} else { |
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pr_debug("Tgid: string not found for pid %d\n", tid); |
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} |
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if (ppids) { |
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ppids += 5; /* strlen("PPid:") */ |
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*ppid = atoi(ppids); |
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} else { |
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pr_debug("PPid: string not found for pid %d\n", tid); |
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} |
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if (!vmpeak && threads) |
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*kernel = true; |
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else |
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*kernel = false; |
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return 0; |
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} |
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static int perf_event__prepare_comm(union perf_event *event, pid_t pid, pid_t tid, |
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struct machine *machine, |
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pid_t *tgid, pid_t *ppid, bool *kernel) |
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{ |
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size_t size; |
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*ppid = -1; |
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memset(&event->comm, 0, sizeof(event->comm)); |
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if (machine__is_host(machine)) { |
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if (perf_event__get_comm_ids(pid, tid, event->comm.comm, |
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sizeof(event->comm.comm), |
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tgid, ppid, kernel) != 0) { |
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return -1; |
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} |
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} else { |
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*tgid = machine->pid; |
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} |
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if (*tgid < 0) |
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return -1; |
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event->comm.pid = *tgid; |
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event->comm.header.type = PERF_RECORD_COMM; |
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size = strlen(event->comm.comm) + 1; |
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size = PERF_ALIGN(size, sizeof(u64)); |
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memset(event->comm.comm + size, 0, machine->id_hdr_size); |
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event->comm.header.size = (sizeof(event->comm) - |
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(sizeof(event->comm.comm) - size) + |
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machine->id_hdr_size); |
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event->comm.tid = tid; |
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return 0; |
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} |
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pid_t perf_event__synthesize_comm(struct perf_tool *tool, |
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union perf_event *event, pid_t pid, |
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perf_event__handler_t process, |
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struct machine *machine) |
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{ |
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pid_t tgid, ppid; |
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bool kernel_thread; |
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if (perf_event__prepare_comm(event, 0, pid, machine, &tgid, &ppid, |
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&kernel_thread) != 0) |
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return -1; |
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if (perf_tool__process_synth_event(tool, event, machine, process) != 0) |
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return -1; |
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return tgid; |
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} |
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static void perf_event__get_ns_link_info(pid_t pid, const char *ns, |
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struct perf_ns_link_info *ns_link_info) |
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{ |
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struct stat64 st; |
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char proc_ns[128]; |
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sprintf(proc_ns, "/proc/%u/ns/%s", pid, ns); |
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if (stat64(proc_ns, &st) == 0) { |
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ns_link_info->dev = st.st_dev; |
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ns_link_info->ino = st.st_ino; |
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} |
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} |
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int perf_event__synthesize_namespaces(struct perf_tool *tool, |
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union perf_event *event, |
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pid_t pid, pid_t tgid, |
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perf_event__handler_t process, |
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struct machine *machine) |
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{ |
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u32 idx; |
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struct perf_ns_link_info *ns_link_info; |
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if (!tool || !tool->namespace_events) |
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return 0; |
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memset(&event->namespaces, 0, (sizeof(event->namespaces) + |
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(NR_NAMESPACES * sizeof(struct perf_ns_link_info)) + |
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machine->id_hdr_size)); |
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event->namespaces.pid = tgid; |
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event->namespaces.tid = pid; |
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event->namespaces.nr_namespaces = NR_NAMESPACES; |
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ns_link_info = event->namespaces.link_info; |
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for (idx = 0; idx < event->namespaces.nr_namespaces; idx++) |
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perf_event__get_ns_link_info(pid, perf_ns__name(idx), |
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&ns_link_info[idx]); |
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event->namespaces.header.type = PERF_RECORD_NAMESPACES; |
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event->namespaces.header.size = (sizeof(event->namespaces) + |
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(NR_NAMESPACES * sizeof(struct perf_ns_link_info)) + |
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machine->id_hdr_size); |
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if (perf_tool__process_synth_event(tool, event, machine, process) != 0) |
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return -1; |
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return 0; |
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} |
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static int perf_event__synthesize_fork(struct perf_tool *tool, |
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union perf_event *event, |
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pid_t pid, pid_t tgid, pid_t ppid, |
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perf_event__handler_t process, |
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struct machine *machine) |
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{ |
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memset(&event->fork, 0, sizeof(event->fork) + machine->id_hdr_size); |
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/* |
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* for main thread set parent to ppid from status file. For other |
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* threads set parent pid to main thread. ie., assume main thread |
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* spawns all threads in a process |
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*/ |
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if (tgid == pid) { |
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event->fork.ppid = ppid; |
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event->fork.ptid = ppid; |
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} else { |
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event->fork.ppid = tgid; |
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event->fork.ptid = tgid; |
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} |
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event->fork.pid = tgid; |
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event->fork.tid = pid; |
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event->fork.header.type = PERF_RECORD_FORK; |
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event->fork.header.misc = PERF_RECORD_MISC_FORK_EXEC; |
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event->fork.header.size = (sizeof(event->fork) + machine->id_hdr_size); |
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if (perf_tool__process_synth_event(tool, event, machine, process) != 0) |
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return -1; |
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return 0; |
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} |
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static bool read_proc_maps_line(struct io *io, __u64 *start, __u64 *end, |
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u32 *prot, u32 *flags, __u64 *offset, |
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u32 *maj, u32 *min, |
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__u64 *inode, |
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ssize_t pathname_size, char *pathname) |
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{ |
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__u64 temp; |
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int ch; |
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char *start_pathname = pathname; |
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if (io__get_hex(io, start) != '-') |
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return false; |
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if (io__get_hex(io, end) != ' ') |
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return false; |
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/* map protection and flags bits */ |
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*prot = 0; |
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ch = io__get_char(io); |
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if (ch == 'r') |
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*prot |= PROT_READ; |
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else if (ch != '-') |
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return false; |
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ch = io__get_char(io); |
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if (ch == 'w') |
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*prot |= PROT_WRITE; |
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else if (ch != '-') |
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return false; |
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ch = io__get_char(io); |
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if (ch == 'x') |
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*prot |= PROT_EXEC; |
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else if (ch != '-') |
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return false; |
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ch = io__get_char(io); |
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if (ch == 's') |
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*flags = MAP_SHARED; |
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else if (ch == 'p') |
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*flags = MAP_PRIVATE; |
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else |
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return false; |
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if (io__get_char(io) != ' ') |
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return false; |
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if (io__get_hex(io, offset) != ' ') |
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return false; |
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if (io__get_hex(io, &temp) != ':') |
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return false; |
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*maj = temp; |
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if (io__get_hex(io, &temp) != ' ') |
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return false; |
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*min = temp; |
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ch = io__get_dec(io, inode); |
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if (ch != ' ') { |
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*pathname = '\0'; |
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return ch == '\n'; |
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} |
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do { |
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ch = io__get_char(io); |
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} while (ch == ' '); |
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while (true) { |
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if (ch < 0) |
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return false; |
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if (ch == '\0' || ch == '\n' || |
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(pathname + 1 - start_pathname) >= pathname_size) { |
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*pathname = '\0'; |
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return true; |
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} |
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*pathname++ = ch; |
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ch = io__get_char(io); |
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} |
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} |
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static void perf_record_mmap2__read_build_id(struct perf_record_mmap2 *event, |
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bool is_kernel) |
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{ |
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struct build_id bid; |
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int rc; |
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|
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if (is_kernel) |
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rc = sysfs__read_build_id("/sys/kernel/notes", &bid); |
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else |
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rc = filename__read_build_id(event->filename, &bid) > 0 ? 0 : -1; |
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|
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if (rc == 0) { |
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memcpy(event->build_id, bid.data, sizeof(bid.data)); |
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event->build_id_size = (u8) bid.size; |
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event->header.misc |= PERF_RECORD_MISC_MMAP_BUILD_ID; |
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event->__reserved_1 = 0; |
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event->__reserved_2 = 0; |
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} else { |
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if (event->filename[0] == '/') { |
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pr_debug2("Failed to read build ID for %s\n", |
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event->filename); |
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} |
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} |
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} |
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int perf_event__synthesize_mmap_events(struct perf_tool *tool, |
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union perf_event *event, |
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pid_t pid, pid_t tgid, |
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perf_event__handler_t process, |
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struct machine *machine, |
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bool mmap_data) |
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{ |
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unsigned long long t; |
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char bf[BUFSIZ]; |
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struct io io; |
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bool truncation = false; |
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unsigned long long timeout = proc_map_timeout * 1000000ULL; |
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int rc = 0; |
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const char *hugetlbfs_mnt = hugetlbfs__mountpoint(); |
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int hugetlbfs_mnt_len = hugetlbfs_mnt ? strlen(hugetlbfs_mnt) : 0; |
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|
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if (machine__is_default_guest(machine)) |
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return 0; |
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|
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snprintf(bf, sizeof(bf), "%s/proc/%d/task/%d/maps", |
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machine->root_dir, pid, pid); |
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|
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io.fd = open(bf, O_RDONLY, 0); |
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if (io.fd < 0) { |
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/* |
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* We raced with a task exiting - just return: |
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*/ |
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pr_debug("couldn't open %s\n", bf); |
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return -1; |
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} |
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io__init(&io, io.fd, bf, sizeof(bf)); |
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event->header.type = PERF_RECORD_MMAP2; |
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t = rdclock(); |
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|
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while (!io.eof) { |
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static const char anonstr[] = "//anon"; |
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size_t size, aligned_size; |
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|
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/* ensure null termination since stack will be reused. */ |
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event->mmap2.filename[0] = '\0'; |
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/* 00400000-0040c000 r-xp 00000000 fd:01 41038 /bin/cat */ |
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if (!read_proc_maps_line(&io, |
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&event->mmap2.start, |
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&event->mmap2.len, |
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&event->mmap2.prot, |
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&event->mmap2.flags, |
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&event->mmap2.pgoff, |
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&event->mmap2.maj, |
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&event->mmap2.min, |
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&event->mmap2.ino, |
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sizeof(event->mmap2.filename), |
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event->mmap2.filename)) |
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continue; |
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|
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if ((rdclock() - t) > timeout) { |
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pr_warning("Reading %s/proc/%d/task/%d/maps time out. " |
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"You may want to increase " |
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"the time limit by --proc-map-timeout\n", |
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machine->root_dir, pid, pid); |
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truncation = true; |
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goto out; |
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} |
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|
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event->mmap2.ino_generation = 0; |
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|
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/* |
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* Just like the kernel, see __perf_event_mmap in kernel/perf_event.c |
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*/ |
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if (machine__is_host(machine)) |
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event->header.misc = PERF_RECORD_MISC_USER; |
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else |
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event->header.misc = PERF_RECORD_MISC_GUEST_USER; |
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|
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if ((event->mmap2.prot & PROT_EXEC) == 0) { |
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if (!mmap_data || (event->mmap2.prot & PROT_READ) == 0) |
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continue; |
|
|
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event->header.misc |= PERF_RECORD_MISC_MMAP_DATA; |
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} |
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|
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out: |
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if (truncation) |
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event->header.misc |= PERF_RECORD_MISC_PROC_MAP_PARSE_TIMEOUT; |
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|
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if (!strcmp(event->mmap2.filename, "")) |
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strcpy(event->mmap2.filename, anonstr); |
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|
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if (hugetlbfs_mnt_len && |
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!strncmp(event->mmap2.filename, hugetlbfs_mnt, |
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hugetlbfs_mnt_len)) { |
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strcpy(event->mmap2.filename, anonstr); |
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event->mmap2.flags |= MAP_HUGETLB; |
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} |
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|
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size = strlen(event->mmap2.filename) + 1; |
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aligned_size = PERF_ALIGN(size, sizeof(u64)); |
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event->mmap2.len -= event->mmap.start; |
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event->mmap2.header.size = (sizeof(event->mmap2) - |
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(sizeof(event->mmap2.filename) - aligned_size)); |
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memset(event->mmap2.filename + size, 0, machine->id_hdr_size + |
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(aligned_size - size)); |
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event->mmap2.header.size += machine->id_hdr_size; |
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event->mmap2.pid = tgid; |
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event->mmap2.tid = pid; |
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|
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if (symbol_conf.buildid_mmap2) |
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perf_record_mmap2__read_build_id(&event->mmap2, false); |
|
|
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if (perf_tool__process_synth_event(tool, event, machine, process) != 0) { |
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rc = -1; |
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break; |
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} |
|
|
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if (truncation) |
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break; |
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} |
|
|
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close(io.fd); |
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return rc; |
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} |
|
|
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#ifdef HAVE_FILE_HANDLE |
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static int perf_event__synthesize_cgroup(struct perf_tool *tool, |
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union perf_event *event, |
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char *path, size_t mount_len, |
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perf_event__handler_t process, |
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struct machine *machine) |
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{ |
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size_t event_size = sizeof(event->cgroup) - sizeof(event->cgroup.path); |
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size_t path_len = strlen(path) - mount_len + 1; |
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struct { |
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struct file_handle fh; |
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uint64_t cgroup_id; |
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} handle; |
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int mount_id; |
|
|
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while (path_len % sizeof(u64)) |
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path[mount_len + path_len++] = '\0'; |
|
|
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memset(&event->cgroup, 0, event_size); |
|
|
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event->cgroup.header.type = PERF_RECORD_CGROUP; |
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event->cgroup.header.size = event_size + path_len + machine->id_hdr_size; |
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|
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handle.fh.handle_bytes = sizeof(handle.cgroup_id); |
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if (name_to_handle_at(AT_FDCWD, path, &handle.fh, &mount_id, 0) < 0) { |
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pr_debug("stat failed: %s\n", path); |
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return -1; |
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} |
|
|
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event->cgroup.id = handle.cgroup_id; |
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strncpy(event->cgroup.path, path + mount_len, path_len); |
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memset(event->cgroup.path + path_len, 0, machine->id_hdr_size); |
|
|
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if (perf_tool__process_synth_event(tool, event, machine, process) < 0) { |
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pr_debug("process synth event failed\n"); |
|
return -1; |
|
} |
|
|
|
return 0; |
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} |
|
|
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static int perf_event__walk_cgroup_tree(struct perf_tool *tool, |
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union perf_event *event, |
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char *path, size_t mount_len, |
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perf_event__handler_t process, |
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struct machine *machine) |
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{ |
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size_t pos = strlen(path); |
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DIR *d; |
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struct dirent *dent; |
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int ret = 0; |
|
|
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if (perf_event__synthesize_cgroup(tool, event, path, mount_len, |
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process, machine) < 0) |
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return -1; |
|
|
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d = opendir(path); |
|
if (d == NULL) { |
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pr_debug("failed to open directory: %s\n", path); |
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return -1; |
|
} |
|
|
|
while ((dent = readdir(d)) != NULL) { |
|
if (dent->d_type != DT_DIR) |
|
continue; |
|
if (!strcmp(dent->d_name, ".") || |
|
!strcmp(dent->d_name, "..")) |
|
continue; |
|
|
|
/* any sane path should be less than PATH_MAX */ |
|
if (strlen(path) + strlen(dent->d_name) + 1 >= PATH_MAX) |
|
continue; |
|
|
|
if (path[pos - 1] != '/') |
|
strcat(path, "/"); |
|
strcat(path, dent->d_name); |
|
|
|
ret = perf_event__walk_cgroup_tree(tool, event, path, |
|
mount_len, process, machine); |
|
if (ret < 0) |
|
break; |
|
|
|
path[pos] = '\0'; |
|
} |
|
|
|
closedir(d); |
|
return ret; |
|
} |
|
|
|
int perf_event__synthesize_cgroups(struct perf_tool *tool, |
|
perf_event__handler_t process, |
|
struct machine *machine) |
|
{ |
|
union perf_event event; |
|
char cgrp_root[PATH_MAX]; |
|
size_t mount_len; /* length of mount point in the path */ |
|
|
|
if (!tool || !tool->cgroup_events) |
|
return 0; |
|
|
|
if (cgroupfs_find_mountpoint(cgrp_root, PATH_MAX, "perf_event") < 0) { |
|
pr_debug("cannot find cgroup mount point\n"); |
|
return -1; |
|
} |
|
|
|
mount_len = strlen(cgrp_root); |
|
/* make sure the path starts with a slash (after mount point) */ |
|
strcat(cgrp_root, "/"); |
|
|
|
if (perf_event__walk_cgroup_tree(tool, &event, cgrp_root, mount_len, |
|
process, machine) < 0) |
|
return -1; |
|
|
|
return 0; |
|
} |
|
#else |
|
int perf_event__synthesize_cgroups(struct perf_tool *tool __maybe_unused, |
|
perf_event__handler_t process __maybe_unused, |
|
struct machine *machine __maybe_unused) |
|
{ |
|
return -1; |
|
} |
|
#endif |
|
|
|
int perf_event__synthesize_modules(struct perf_tool *tool, perf_event__handler_t process, |
|
struct machine *machine) |
|
{ |
|
int rc = 0; |
|
struct map *pos; |
|
struct maps *maps = machine__kernel_maps(machine); |
|
union perf_event *event; |
|
size_t size = symbol_conf.buildid_mmap2 ? |
|
sizeof(event->mmap2) : sizeof(event->mmap); |
|
|
|
event = zalloc(size + machine->id_hdr_size); |
|
if (event == NULL) { |
|
pr_debug("Not enough memory synthesizing mmap event " |
|
"for kernel modules\n"); |
|
return -1; |
|
} |
|
|
|
/* |
|
* kernel uses 0 for user space maps, see kernel/perf_event.c |
|
* __perf_event_mmap |
|
*/ |
|
if (machine__is_host(machine)) |
|
event->header.misc = PERF_RECORD_MISC_KERNEL; |
|
else |
|
event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL; |
|
|
|
maps__for_each_entry(maps, pos) { |
|
if (!__map__is_kmodule(pos)) |
|
continue; |
|
|
|
if (symbol_conf.buildid_mmap2) { |
|
size = PERF_ALIGN(pos->dso->long_name_len + 1, sizeof(u64)); |
|
event->mmap2.header.type = PERF_RECORD_MMAP2; |
|
event->mmap2.header.size = (sizeof(event->mmap2) - |
|
(sizeof(event->mmap2.filename) - size)); |
|
memset(event->mmap2.filename + size, 0, machine->id_hdr_size); |
|
event->mmap2.header.size += machine->id_hdr_size; |
|
event->mmap2.start = pos->start; |
|
event->mmap2.len = pos->end - pos->start; |
|
event->mmap2.pid = machine->pid; |
|
|
|
memcpy(event->mmap2.filename, pos->dso->long_name, |
|
pos->dso->long_name_len + 1); |
|
|
|
perf_record_mmap2__read_build_id(&event->mmap2, false); |
|
} else { |
|
size = PERF_ALIGN(pos->dso->long_name_len + 1, sizeof(u64)); |
|
event->mmap.header.type = PERF_RECORD_MMAP; |
|
event->mmap.header.size = (sizeof(event->mmap) - |
|
(sizeof(event->mmap.filename) - size)); |
|
memset(event->mmap.filename + size, 0, machine->id_hdr_size); |
|
event->mmap.header.size += machine->id_hdr_size; |
|
event->mmap.start = pos->start; |
|
event->mmap.len = pos->end - pos->start; |
|
event->mmap.pid = machine->pid; |
|
|
|
memcpy(event->mmap.filename, pos->dso->long_name, |
|
pos->dso->long_name_len + 1); |
|
} |
|
|
|
if (perf_tool__process_synth_event(tool, event, machine, process) != 0) { |
|
rc = -1; |
|
break; |
|
} |
|
} |
|
|
|
free(event); |
|
return rc; |
|
} |
|
|
|
static int filter_task(const struct dirent *dirent) |
|
{ |
|
return isdigit(dirent->d_name[0]); |
|
} |
|
|
|
static int __event__synthesize_thread(union perf_event *comm_event, |
|
union perf_event *mmap_event, |
|
union perf_event *fork_event, |
|
union perf_event *namespaces_event, |
|
pid_t pid, int full, perf_event__handler_t process, |
|
struct perf_tool *tool, struct machine *machine, bool mmap_data) |
|
{ |
|
char filename[PATH_MAX]; |
|
struct dirent **dirent; |
|
pid_t tgid, ppid; |
|
int rc = 0; |
|
int i, n; |
|
|
|
/* special case: only send one comm event using passed in pid */ |
|
if (!full) { |
|
tgid = perf_event__synthesize_comm(tool, comm_event, pid, |
|
process, machine); |
|
|
|
if (tgid == -1) |
|
return -1; |
|
|
|
if (perf_event__synthesize_namespaces(tool, namespaces_event, pid, |
|
tgid, process, machine) < 0) |
|
return -1; |
|
|
|
/* |
|
* send mmap only for thread group leader |
|
* see thread__init_maps() |
|
*/ |
|
if (pid == tgid && |
|
perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid, |
|
process, machine, mmap_data)) |
|
return -1; |
|
|
|
return 0; |
|
} |
|
|
|
if (machine__is_default_guest(machine)) |
|
return 0; |
|
|
|
snprintf(filename, sizeof(filename), "%s/proc/%d/task", |
|
machine->root_dir, pid); |
|
|
|
n = scandir(filename, &dirent, filter_task, alphasort); |
|
if (n < 0) |
|
return n; |
|
|
|
for (i = 0; i < n; i++) { |
|
char *end; |
|
pid_t _pid; |
|
bool kernel_thread = false; |
|
|
|
_pid = strtol(dirent[i]->d_name, &end, 10); |
|
if (*end) |
|
continue; |
|
|
|
rc = -1; |
|
if (perf_event__prepare_comm(comm_event, pid, _pid, machine, |
|
&tgid, &ppid, &kernel_thread) != 0) |
|
break; |
|
|
|
if (perf_event__synthesize_fork(tool, fork_event, _pid, tgid, |
|
ppid, process, machine) < 0) |
|
break; |
|
|
|
if (perf_event__synthesize_namespaces(tool, namespaces_event, _pid, |
|
tgid, process, machine) < 0) |
|
break; |
|
|
|
/* |
|
* Send the prepared comm event |
|
*/ |
|
if (perf_tool__process_synth_event(tool, comm_event, machine, process) != 0) |
|
break; |
|
|
|
rc = 0; |
|
if (_pid == pid && !kernel_thread) { |
|
/* process the parent's maps too */ |
|
rc = perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid, |
|
process, machine, mmap_data); |
|
if (rc) |
|
break; |
|
} |
|
} |
|
|
|
for (i = 0; i < n; i++) |
|
zfree(&dirent[i]); |
|
free(dirent); |
|
|
|
return rc; |
|
} |
|
|
|
int perf_event__synthesize_thread_map(struct perf_tool *tool, |
|
struct perf_thread_map *threads, |
|
perf_event__handler_t process, |
|
struct machine *machine, |
|
bool mmap_data) |
|
{ |
|
union perf_event *comm_event, *mmap_event, *fork_event; |
|
union perf_event *namespaces_event; |
|
int err = -1, thread, j; |
|
|
|
comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size); |
|
if (comm_event == NULL) |
|
goto out; |
|
|
|
mmap_event = malloc(sizeof(mmap_event->mmap2) + machine->id_hdr_size); |
|
if (mmap_event == NULL) |
|
goto out_free_comm; |
|
|
|
fork_event = malloc(sizeof(fork_event->fork) + machine->id_hdr_size); |
|
if (fork_event == NULL) |
|
goto out_free_mmap; |
|
|
|
namespaces_event = malloc(sizeof(namespaces_event->namespaces) + |
|
(NR_NAMESPACES * sizeof(struct perf_ns_link_info)) + |
|
machine->id_hdr_size); |
|
if (namespaces_event == NULL) |
|
goto out_free_fork; |
|
|
|
err = 0; |
|
for (thread = 0; thread < threads->nr; ++thread) { |
|
if (__event__synthesize_thread(comm_event, mmap_event, |
|
fork_event, namespaces_event, |
|
perf_thread_map__pid(threads, thread), 0, |
|
process, tool, machine, |
|
mmap_data)) { |
|
err = -1; |
|
break; |
|
} |
|
|
|
/* |
|
* comm.pid is set to thread group id by |
|
* perf_event__synthesize_comm |
|
*/ |
|
if ((int) comm_event->comm.pid != perf_thread_map__pid(threads, thread)) { |
|
bool need_leader = true; |
|
|
|
/* is thread group leader in thread_map? */ |
|
for (j = 0; j < threads->nr; ++j) { |
|
if ((int) comm_event->comm.pid == perf_thread_map__pid(threads, j)) { |
|
need_leader = false; |
|
break; |
|
} |
|
} |
|
|
|
/* if not, generate events for it */ |
|
if (need_leader && |
|
__event__synthesize_thread(comm_event, mmap_event, |
|
fork_event, namespaces_event, |
|
comm_event->comm.pid, 0, |
|
process, tool, machine, |
|
mmap_data)) { |
|
err = -1; |
|
break; |
|
} |
|
} |
|
} |
|
free(namespaces_event); |
|
out_free_fork: |
|
free(fork_event); |
|
out_free_mmap: |
|
free(mmap_event); |
|
out_free_comm: |
|
free(comm_event); |
|
out: |
|
return err; |
|
} |
|
|
|
static int __perf_event__synthesize_threads(struct perf_tool *tool, |
|
perf_event__handler_t process, |
|
struct machine *machine, |
|
bool mmap_data, |
|
struct dirent **dirent, |
|
int start, |
|
int num) |
|
{ |
|
union perf_event *comm_event, *mmap_event, *fork_event; |
|
union perf_event *namespaces_event; |
|
int err = -1; |
|
char *end; |
|
pid_t pid; |
|
int i; |
|
|
|
comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size); |
|
if (comm_event == NULL) |
|
goto out; |
|
|
|
mmap_event = malloc(sizeof(mmap_event->mmap2) + machine->id_hdr_size); |
|
if (mmap_event == NULL) |
|
goto out_free_comm; |
|
|
|
fork_event = malloc(sizeof(fork_event->fork) + machine->id_hdr_size); |
|
if (fork_event == NULL) |
|
goto out_free_mmap; |
|
|
|
namespaces_event = malloc(sizeof(namespaces_event->namespaces) + |
|
(NR_NAMESPACES * sizeof(struct perf_ns_link_info)) + |
|
machine->id_hdr_size); |
|
if (namespaces_event == NULL) |
|
goto out_free_fork; |
|
|
|
for (i = start; i < start + num; i++) { |
|
if (!isdigit(dirent[i]->d_name[0])) |
|
continue; |
|
|
|
pid = (pid_t)strtol(dirent[i]->d_name, &end, 10); |
|
/* only interested in proper numerical dirents */ |
|
if (*end) |
|
continue; |
|
/* |
|
* We may race with exiting thread, so don't stop just because |
|
* one thread couldn't be synthesized. |
|
*/ |
|
__event__synthesize_thread(comm_event, mmap_event, fork_event, |
|
namespaces_event, pid, 1, process, |
|
tool, machine, mmap_data); |
|
} |
|
err = 0; |
|
|
|
free(namespaces_event); |
|
out_free_fork: |
|
free(fork_event); |
|
out_free_mmap: |
|
free(mmap_event); |
|
out_free_comm: |
|
free(comm_event); |
|
out: |
|
return err; |
|
} |
|
|
|
struct synthesize_threads_arg { |
|
struct perf_tool *tool; |
|
perf_event__handler_t process; |
|
struct machine *machine; |
|
bool mmap_data; |
|
struct dirent **dirent; |
|
int num; |
|
int start; |
|
}; |
|
|
|
static void *synthesize_threads_worker(void *arg) |
|
{ |
|
struct synthesize_threads_arg *args = arg; |
|
|
|
__perf_event__synthesize_threads(args->tool, args->process, |
|
args->machine, args->mmap_data, |
|
args->dirent, |
|
args->start, args->num); |
|
return NULL; |
|
} |
|
|
|
int perf_event__synthesize_threads(struct perf_tool *tool, |
|
perf_event__handler_t process, |
|
struct machine *machine, |
|
bool mmap_data, |
|
unsigned int nr_threads_synthesize) |
|
{ |
|
struct synthesize_threads_arg *args = NULL; |
|
pthread_t *synthesize_threads = NULL; |
|
char proc_path[PATH_MAX]; |
|
struct dirent **dirent; |
|
int num_per_thread; |
|
int m, n, i, j; |
|
int thread_nr; |
|
int base = 0; |
|
int err = -1; |
|
|
|
|
|
if (machine__is_default_guest(machine)) |
|
return 0; |
|
|
|
snprintf(proc_path, sizeof(proc_path), "%s/proc", machine->root_dir); |
|
n = scandir(proc_path, &dirent, filter_task, alphasort); |
|
if (n < 0) |
|
return err; |
|
|
|
if (nr_threads_synthesize == UINT_MAX) |
|
thread_nr = sysconf(_SC_NPROCESSORS_ONLN); |
|
else |
|
thread_nr = nr_threads_synthesize; |
|
|
|
if (thread_nr <= 1) { |
|
err = __perf_event__synthesize_threads(tool, process, |
|
machine, mmap_data, |
|
dirent, base, n); |
|
goto free_dirent; |
|
} |
|
if (thread_nr > n) |
|
thread_nr = n; |
|
|
|
synthesize_threads = calloc(sizeof(pthread_t), thread_nr); |
|
if (synthesize_threads == NULL) |
|
goto free_dirent; |
|
|
|
args = calloc(sizeof(*args), thread_nr); |
|
if (args == NULL) |
|
goto free_threads; |
|
|
|
num_per_thread = n / thread_nr; |
|
m = n % thread_nr; |
|
for (i = 0; i < thread_nr; i++) { |
|
args[i].tool = tool; |
|
args[i].process = process; |
|
args[i].machine = machine; |
|
args[i].mmap_data = mmap_data; |
|
args[i].dirent = dirent; |
|
} |
|
for (i = 0; i < m; i++) { |
|
args[i].num = num_per_thread + 1; |
|
args[i].start = i * args[i].num; |
|
} |
|
if (i != 0) |
|
base = args[i-1].start + args[i-1].num; |
|
for (j = i; j < thread_nr; j++) { |
|
args[j].num = num_per_thread; |
|
args[j].start = base + (j - i) * args[i].num; |
|
} |
|
|
|
for (i = 0; i < thread_nr; i++) { |
|
if (pthread_create(&synthesize_threads[i], NULL, |
|
synthesize_threads_worker, &args[i])) |
|
goto out_join; |
|
} |
|
err = 0; |
|
out_join: |
|
for (i = 0; i < thread_nr; i++) |
|
pthread_join(synthesize_threads[i], NULL); |
|
free(args); |
|
free_threads: |
|
free(synthesize_threads); |
|
free_dirent: |
|
for (i = 0; i < n; i++) |
|
zfree(&dirent[i]); |
|
free(dirent); |
|
|
|
return err; |
|
} |
|
|
|
int __weak perf_event__synthesize_extra_kmaps(struct perf_tool *tool __maybe_unused, |
|
perf_event__handler_t process __maybe_unused, |
|
struct machine *machine __maybe_unused) |
|
{ |
|
return 0; |
|
} |
|
|
|
static int __perf_event__synthesize_kernel_mmap(struct perf_tool *tool, |
|
perf_event__handler_t process, |
|
struct machine *machine) |
|
{ |
|
union perf_event *event; |
|
size_t size = symbol_conf.buildid_mmap2 ? |
|
sizeof(event->mmap2) : sizeof(event->mmap); |
|
struct map *map = machine__kernel_map(machine); |
|
struct kmap *kmap; |
|
int err; |
|
|
|
if (map == NULL) |
|
return -1; |
|
|
|
kmap = map__kmap(map); |
|
if (!kmap->ref_reloc_sym) |
|
return -1; |
|
|
|
/* |
|
* We should get this from /sys/kernel/sections/.text, but till that is |
|
* available use this, and after it is use this as a fallback for older |
|
* kernels. |
|
*/ |
|
event = zalloc(size + machine->id_hdr_size); |
|
if (event == NULL) { |
|
pr_debug("Not enough memory synthesizing mmap event " |
|
"for kernel modules\n"); |
|
return -1; |
|
} |
|
|
|
if (machine__is_host(machine)) { |
|
/* |
|
* kernel uses PERF_RECORD_MISC_USER for user space maps, |
|
* see kernel/perf_event.c __perf_event_mmap |
|
*/ |
|
event->header.misc = PERF_RECORD_MISC_KERNEL; |
|
} else { |
|
event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL; |
|
} |
|
|
|
if (symbol_conf.buildid_mmap2) { |
|
size = snprintf(event->mmap2.filename, sizeof(event->mmap2.filename), |
|
"%s%s", machine->mmap_name, kmap->ref_reloc_sym->name) + 1; |
|
size = PERF_ALIGN(size, sizeof(u64)); |
|
event->mmap2.header.type = PERF_RECORD_MMAP2; |
|
event->mmap2.header.size = (sizeof(event->mmap2) - |
|
(sizeof(event->mmap2.filename) - size) + machine->id_hdr_size); |
|
event->mmap2.pgoff = kmap->ref_reloc_sym->addr; |
|
event->mmap2.start = map->start; |
|
event->mmap2.len = map->end - event->mmap.start; |
|
event->mmap2.pid = machine->pid; |
|
|
|
perf_record_mmap2__read_build_id(&event->mmap2, true); |
|
} else { |
|
size = snprintf(event->mmap.filename, sizeof(event->mmap.filename), |
|
"%s%s", machine->mmap_name, kmap->ref_reloc_sym->name) + 1; |
|
size = PERF_ALIGN(size, sizeof(u64)); |
|
event->mmap.header.type = PERF_RECORD_MMAP; |
|
event->mmap.header.size = (sizeof(event->mmap) - |
|
(sizeof(event->mmap.filename) - size) + machine->id_hdr_size); |
|
event->mmap.pgoff = kmap->ref_reloc_sym->addr; |
|
event->mmap.start = map->start; |
|
event->mmap.len = map->end - event->mmap.start; |
|
event->mmap.pid = machine->pid; |
|
} |
|
|
|
err = perf_tool__process_synth_event(tool, event, machine, process); |
|
free(event); |
|
|
|
return err; |
|
} |
|
|
|
int perf_event__synthesize_kernel_mmap(struct perf_tool *tool, |
|
perf_event__handler_t process, |
|
struct machine *machine) |
|
{ |
|
int err; |
|
|
|
err = __perf_event__synthesize_kernel_mmap(tool, process, machine); |
|
if (err < 0) |
|
return err; |
|
|
|
return perf_event__synthesize_extra_kmaps(tool, process, machine); |
|
} |
|
|
|
int perf_event__synthesize_thread_map2(struct perf_tool *tool, |
|
struct perf_thread_map *threads, |
|
perf_event__handler_t process, |
|
struct machine *machine) |
|
{ |
|
union perf_event *event; |
|
int i, err, size; |
|
|
|
size = sizeof(event->thread_map); |
|
size += threads->nr * sizeof(event->thread_map.entries[0]); |
|
|
|
event = zalloc(size); |
|
if (!event) |
|
return -ENOMEM; |
|
|
|
event->header.type = PERF_RECORD_THREAD_MAP; |
|
event->header.size = size; |
|
event->thread_map.nr = threads->nr; |
|
|
|
for (i = 0; i < threads->nr; i++) { |
|
struct perf_record_thread_map_entry *entry = &event->thread_map.entries[i]; |
|
char *comm = perf_thread_map__comm(threads, i); |
|
|
|
if (!comm) |
|
comm = (char *) ""; |
|
|
|
entry->pid = perf_thread_map__pid(threads, i); |
|
strncpy((char *) &entry->comm, comm, sizeof(entry->comm)); |
|
} |
|
|
|
err = process(tool, event, NULL, machine); |
|
|
|
free(event); |
|
return err; |
|
} |
|
|
|
static void synthesize_cpus(struct cpu_map_entries *cpus, |
|
struct perf_cpu_map *map) |
|
{ |
|
int i; |
|
|
|
cpus->nr = map->nr; |
|
|
|
for (i = 0; i < map->nr; i++) |
|
cpus->cpu[i] = map->map[i]; |
|
} |
|
|
|
static void synthesize_mask(struct perf_record_record_cpu_map *mask, |
|
struct perf_cpu_map *map, int max) |
|
{ |
|
int i; |
|
|
|
mask->nr = BITS_TO_LONGS(max); |
|
mask->long_size = sizeof(long); |
|
|
|
for (i = 0; i < map->nr; i++) |
|
set_bit(map->map[i], mask->mask); |
|
} |
|
|
|
static size_t cpus_size(struct perf_cpu_map *map) |
|
{ |
|
return sizeof(struct cpu_map_entries) + map->nr * sizeof(u16); |
|
} |
|
|
|
static size_t mask_size(struct perf_cpu_map *map, int *max) |
|
{ |
|
int i; |
|
|
|
*max = 0; |
|
|
|
for (i = 0; i < map->nr; i++) { |
|
/* bit position of the cpu is + 1 */ |
|
int bit = map->map[i] + 1; |
|
|
|
if (bit > *max) |
|
*max = bit; |
|
} |
|
|
|
return sizeof(struct perf_record_record_cpu_map) + BITS_TO_LONGS(*max) * sizeof(long); |
|
} |
|
|
|
void *cpu_map_data__alloc(struct perf_cpu_map *map, size_t *size, u16 *type, int *max) |
|
{ |
|
size_t size_cpus, size_mask; |
|
bool is_dummy = perf_cpu_map__empty(map); |
|
|
|
/* |
|
* Both array and mask data have variable size based |
|
* on the number of cpus and their actual values. |
|
* The size of the 'struct perf_record_cpu_map_data' is: |
|
* |
|
* array = size of 'struct cpu_map_entries' + |
|
* number of cpus * sizeof(u64) |
|
* |
|
* mask = size of 'struct perf_record_record_cpu_map' + |
|
* maximum cpu bit converted to size of longs |
|
* |
|
* and finally + the size of 'struct perf_record_cpu_map_data'. |
|
*/ |
|
size_cpus = cpus_size(map); |
|
size_mask = mask_size(map, max); |
|
|
|
if (is_dummy || (size_cpus < size_mask)) { |
|
*size += size_cpus; |
|
*type = PERF_CPU_MAP__CPUS; |
|
} else { |
|
*size += size_mask; |
|
*type = PERF_CPU_MAP__MASK; |
|
} |
|
|
|
*size += sizeof(struct perf_record_cpu_map_data); |
|
*size = PERF_ALIGN(*size, sizeof(u64)); |
|
return zalloc(*size); |
|
} |
|
|
|
void cpu_map_data__synthesize(struct perf_record_cpu_map_data *data, struct perf_cpu_map *map, |
|
u16 type, int max) |
|
{ |
|
data->type = type; |
|
|
|
switch (type) { |
|
case PERF_CPU_MAP__CPUS: |
|
synthesize_cpus((struct cpu_map_entries *) data->data, map); |
|
break; |
|
case PERF_CPU_MAP__MASK: |
|
synthesize_mask((struct perf_record_record_cpu_map *)data->data, map, max); |
|
default: |
|
break; |
|
} |
|
} |
|
|
|
static struct perf_record_cpu_map *cpu_map_event__new(struct perf_cpu_map *map) |
|
{ |
|
size_t size = sizeof(struct perf_record_cpu_map); |
|
struct perf_record_cpu_map *event; |
|
int max; |
|
u16 type; |
|
|
|
event = cpu_map_data__alloc(map, &size, &type, &max); |
|
if (!event) |
|
return NULL; |
|
|
|
event->header.type = PERF_RECORD_CPU_MAP; |
|
event->header.size = size; |
|
event->data.type = type; |
|
|
|
cpu_map_data__synthesize(&event->data, map, type, max); |
|
return event; |
|
} |
|
|
|
int perf_event__synthesize_cpu_map(struct perf_tool *tool, |
|
struct perf_cpu_map *map, |
|
perf_event__handler_t process, |
|
struct machine *machine) |
|
{ |
|
struct perf_record_cpu_map *event; |
|
int err; |
|
|
|
event = cpu_map_event__new(map); |
|
if (!event) |
|
return -ENOMEM; |
|
|
|
err = process(tool, (union perf_event *) event, NULL, machine); |
|
|
|
free(event); |
|
return err; |
|
} |
|
|
|
int perf_event__synthesize_stat_config(struct perf_tool *tool, |
|
struct perf_stat_config *config, |
|
perf_event__handler_t process, |
|
struct machine *machine) |
|
{ |
|
struct perf_record_stat_config *event; |
|
int size, i = 0, err; |
|
|
|
size = sizeof(*event); |
|
size += (PERF_STAT_CONFIG_TERM__MAX * sizeof(event->data[0])); |
|
|
|
event = zalloc(size); |
|
if (!event) |
|
return -ENOMEM; |
|
|
|
event->header.type = PERF_RECORD_STAT_CONFIG; |
|
event->header.size = size; |
|
event->nr = PERF_STAT_CONFIG_TERM__MAX; |
|
|
|
#define ADD(__term, __val) \ |
|
event->data[i].tag = PERF_STAT_CONFIG_TERM__##__term; \ |
|
event->data[i].val = __val; \ |
|
i++; |
|
|
|
ADD(AGGR_MODE, config->aggr_mode) |
|
ADD(INTERVAL, config->interval) |
|
ADD(SCALE, config->scale) |
|
|
|
WARN_ONCE(i != PERF_STAT_CONFIG_TERM__MAX, |
|
"stat config terms unbalanced\n"); |
|
#undef ADD |
|
|
|
err = process(tool, (union perf_event *) event, NULL, machine); |
|
|
|
free(event); |
|
return err; |
|
} |
|
|
|
int perf_event__synthesize_stat(struct perf_tool *tool, |
|
u32 cpu, u32 thread, u64 id, |
|
struct perf_counts_values *count, |
|
perf_event__handler_t process, |
|
struct machine *machine) |
|
{ |
|
struct perf_record_stat event; |
|
|
|
event.header.type = PERF_RECORD_STAT; |
|
event.header.size = sizeof(event); |
|
event.header.misc = 0; |
|
|
|
event.id = id; |
|
event.cpu = cpu; |
|
event.thread = thread; |
|
event.val = count->val; |
|
event.ena = count->ena; |
|
event.run = count->run; |
|
|
|
return process(tool, (union perf_event *) &event, NULL, machine); |
|
} |
|
|
|
int perf_event__synthesize_stat_round(struct perf_tool *tool, |
|
u64 evtime, u64 type, |
|
perf_event__handler_t process, |
|
struct machine *machine) |
|
{ |
|
struct perf_record_stat_round event; |
|
|
|
event.header.type = PERF_RECORD_STAT_ROUND; |
|
event.header.size = sizeof(event); |
|
event.header.misc = 0; |
|
|
|
event.time = evtime; |
|
event.type = type; |
|
|
|
return process(tool, (union perf_event *) &event, NULL, machine); |
|
} |
|
|
|
size_t perf_event__sample_event_size(const struct perf_sample *sample, u64 type, u64 read_format) |
|
{ |
|
size_t sz, result = sizeof(struct perf_record_sample); |
|
|
|
if (type & PERF_SAMPLE_IDENTIFIER) |
|
result += sizeof(u64); |
|
|
|
if (type & PERF_SAMPLE_IP) |
|
result += sizeof(u64); |
|
|
|
if (type & PERF_SAMPLE_TID) |
|
result += sizeof(u64); |
|
|
|
if (type & PERF_SAMPLE_TIME) |
|
result += sizeof(u64); |
|
|
|
if (type & PERF_SAMPLE_ADDR) |
|
result += sizeof(u64); |
|
|
|
if (type & PERF_SAMPLE_ID) |
|
result += sizeof(u64); |
|
|
|
if (type & PERF_SAMPLE_STREAM_ID) |
|
result += sizeof(u64); |
|
|
|
if (type & PERF_SAMPLE_CPU) |
|
result += sizeof(u64); |
|
|
|
if (type & PERF_SAMPLE_PERIOD) |
|
result += sizeof(u64); |
|
|
|
if (type & PERF_SAMPLE_READ) { |
|
result += sizeof(u64); |
|
if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) |
|
result += sizeof(u64); |
|
if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) |
|
result += sizeof(u64); |
|
/* PERF_FORMAT_ID is forced for PERF_SAMPLE_READ */ |
|
if (read_format & PERF_FORMAT_GROUP) { |
|
sz = sample->read.group.nr * |
|
sizeof(struct sample_read_value); |
|
result += sz; |
|
} else { |
|
result += sizeof(u64); |
|
} |
|
} |
|
|
|
if (type & PERF_SAMPLE_CALLCHAIN) { |
|
sz = (sample->callchain->nr + 1) * sizeof(u64); |
|
result += sz; |
|
} |
|
|
|
if (type & PERF_SAMPLE_RAW) { |
|
result += sizeof(u32); |
|
result += sample->raw_size; |
|
} |
|
|
|
if (type & PERF_SAMPLE_BRANCH_STACK) { |
|
sz = sample->branch_stack->nr * sizeof(struct branch_entry); |
|
/* nr, hw_idx */ |
|
sz += 2 * sizeof(u64); |
|
result += sz; |
|
} |
|
|
|
if (type & PERF_SAMPLE_REGS_USER) { |
|
if (sample->user_regs.abi) { |
|
result += sizeof(u64); |
|
sz = hweight64(sample->user_regs.mask) * sizeof(u64); |
|
result += sz; |
|
} else { |
|
result += sizeof(u64); |
|
} |
|
} |
|
|
|
if (type & PERF_SAMPLE_STACK_USER) { |
|
sz = sample->user_stack.size; |
|
result += sizeof(u64); |
|
if (sz) { |
|
result += sz; |
|
result += sizeof(u64); |
|
} |
|
} |
|
|
|
if (type & PERF_SAMPLE_WEIGHT_TYPE) |
|
result += sizeof(u64); |
|
|
|
if (type & PERF_SAMPLE_DATA_SRC) |
|
result += sizeof(u64); |
|
|
|
if (type & PERF_SAMPLE_TRANSACTION) |
|
result += sizeof(u64); |
|
|
|
if (type & PERF_SAMPLE_REGS_INTR) { |
|
if (sample->intr_regs.abi) { |
|
result += sizeof(u64); |
|
sz = hweight64(sample->intr_regs.mask) * sizeof(u64); |
|
result += sz; |
|
} else { |
|
result += sizeof(u64); |
|
} |
|
} |
|
|
|
if (type & PERF_SAMPLE_PHYS_ADDR) |
|
result += sizeof(u64); |
|
|
|
if (type & PERF_SAMPLE_CGROUP) |
|
result += sizeof(u64); |
|
|
|
if (type & PERF_SAMPLE_DATA_PAGE_SIZE) |
|
result += sizeof(u64); |
|
|
|
if (type & PERF_SAMPLE_CODE_PAGE_SIZE) |
|
result += sizeof(u64); |
|
|
|
if (type & PERF_SAMPLE_AUX) { |
|
result += sizeof(u64); |
|
result += sample->aux_sample.size; |
|
} |
|
|
|
return result; |
|
} |
|
|
|
void __weak arch_perf_synthesize_sample_weight(const struct perf_sample *data, |
|
__u64 *array, u64 type __maybe_unused) |
|
{ |
|
*array = data->weight; |
|
} |
|
|
|
int perf_event__synthesize_sample(union perf_event *event, u64 type, u64 read_format, |
|
const struct perf_sample *sample) |
|
{ |
|
__u64 *array; |
|
size_t sz; |
|
/* |
|
* used for cross-endian analysis. See git commit 65014ab3 |
|
* for why this goofiness is needed. |
|
*/ |
|
union u64_swap u; |
|
|
|
array = event->sample.array; |
|
|
|
if (type & PERF_SAMPLE_IDENTIFIER) { |
|
*array = sample->id; |
|
array++; |
|
} |
|
|
|
if (type & PERF_SAMPLE_IP) { |
|
*array = sample->ip; |
|
array++; |
|
} |
|
|
|
if (type & PERF_SAMPLE_TID) { |
|
u.val32[0] = sample->pid; |
|
u.val32[1] = sample->tid; |
|
*array = u.val64; |
|
array++; |
|
} |
|
|
|
if (type & PERF_SAMPLE_TIME) { |
|
*array = sample->time; |
|
array++; |
|
} |
|
|
|
if (type & PERF_SAMPLE_ADDR) { |
|
*array = sample->addr; |
|
array++; |
|
} |
|
|
|
if (type & PERF_SAMPLE_ID) { |
|
*array = sample->id; |
|
array++; |
|
} |
|
|
|
if (type & PERF_SAMPLE_STREAM_ID) { |
|
*array = sample->stream_id; |
|
array++; |
|
} |
|
|
|
if (type & PERF_SAMPLE_CPU) { |
|
u.val32[0] = sample->cpu; |
|
u.val32[1] = 0; |
|
*array = u.val64; |
|
array++; |
|
} |
|
|
|
if (type & PERF_SAMPLE_PERIOD) { |
|
*array = sample->period; |
|
array++; |
|
} |
|
|
|
if (type & PERF_SAMPLE_READ) { |
|
if (read_format & PERF_FORMAT_GROUP) |
|
*array = sample->read.group.nr; |
|
else |
|
*array = sample->read.one.value; |
|
array++; |
|
|
|
if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) { |
|
*array = sample->read.time_enabled; |
|
array++; |
|
} |
|
|
|
if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) { |
|
*array = sample->read.time_running; |
|
array++; |
|
} |
|
|
|
/* PERF_FORMAT_ID is forced for PERF_SAMPLE_READ */ |
|
if (read_format & PERF_FORMAT_GROUP) { |
|
sz = sample->read.group.nr * |
|
sizeof(struct sample_read_value); |
|
memcpy(array, sample->read.group.values, sz); |
|
array = (void *)array + sz; |
|
} else { |
|
*array = sample->read.one.id; |
|
array++; |
|
} |
|
} |
|
|
|
if (type & PERF_SAMPLE_CALLCHAIN) { |
|
sz = (sample->callchain->nr + 1) * sizeof(u64); |
|
memcpy(array, sample->callchain, sz); |
|
array = (void *)array + sz; |
|
} |
|
|
|
if (type & PERF_SAMPLE_RAW) { |
|
u.val32[0] = sample->raw_size; |
|
*array = u.val64; |
|
array = (void *)array + sizeof(u32); |
|
|
|
memcpy(array, sample->raw_data, sample->raw_size); |
|
array = (void *)array + sample->raw_size; |
|
} |
|
|
|
if (type & PERF_SAMPLE_BRANCH_STACK) { |
|
sz = sample->branch_stack->nr * sizeof(struct branch_entry); |
|
/* nr, hw_idx */ |
|
sz += 2 * sizeof(u64); |
|
memcpy(array, sample->branch_stack, sz); |
|
array = (void *)array + sz; |
|
} |
|
|
|
if (type & PERF_SAMPLE_REGS_USER) { |
|
if (sample->user_regs.abi) { |
|
*array++ = sample->user_regs.abi; |
|
sz = hweight64(sample->user_regs.mask) * sizeof(u64); |
|
memcpy(array, sample->user_regs.regs, sz); |
|
array = (void *)array + sz; |
|
} else { |
|
*array++ = 0; |
|
} |
|
} |
|
|
|
if (type & PERF_SAMPLE_STACK_USER) { |
|
sz = sample->user_stack.size; |
|
*array++ = sz; |
|
if (sz) { |
|
memcpy(array, sample->user_stack.data, sz); |
|
array = (void *)array + sz; |
|
*array++ = sz; |
|
} |
|
} |
|
|
|
if (type & PERF_SAMPLE_WEIGHT_TYPE) { |
|
arch_perf_synthesize_sample_weight(sample, array, type); |
|
array++; |
|
} |
|
|
|
if (type & PERF_SAMPLE_DATA_SRC) { |
|
*array = sample->data_src; |
|
array++; |
|
} |
|
|
|
if (type & PERF_SAMPLE_TRANSACTION) { |
|
*array = sample->transaction; |
|
array++; |
|
} |
|
|
|
if (type & PERF_SAMPLE_REGS_INTR) { |
|
if (sample->intr_regs.abi) { |
|
*array++ = sample->intr_regs.abi; |
|
sz = hweight64(sample->intr_regs.mask) * sizeof(u64); |
|
memcpy(array, sample->intr_regs.regs, sz); |
|
array = (void *)array + sz; |
|
} else { |
|
*array++ = 0; |
|
} |
|
} |
|
|
|
if (type & PERF_SAMPLE_PHYS_ADDR) { |
|
*array = sample->phys_addr; |
|
array++; |
|
} |
|
|
|
if (type & PERF_SAMPLE_CGROUP) { |
|
*array = sample->cgroup; |
|
array++; |
|
} |
|
|
|
if (type & PERF_SAMPLE_DATA_PAGE_SIZE) { |
|
*array = sample->data_page_size; |
|
array++; |
|
} |
|
|
|
if (type & PERF_SAMPLE_CODE_PAGE_SIZE) { |
|
*array = sample->code_page_size; |
|
array++; |
|
} |
|
|
|
if (type & PERF_SAMPLE_AUX) { |
|
sz = sample->aux_sample.size; |
|
*array++ = sz; |
|
memcpy(array, sample->aux_sample.data, sz); |
|
array = (void *)array + sz; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
int perf_event__synthesize_id_index(struct perf_tool *tool, perf_event__handler_t process, |
|
struct evlist *evlist, struct machine *machine) |
|
{ |
|
union perf_event *ev; |
|
struct evsel *evsel; |
|
size_t nr = 0, i = 0, sz, max_nr, n; |
|
int err; |
|
|
|
pr_debug2("Synthesizing id index\n"); |
|
|
|
max_nr = (UINT16_MAX - sizeof(struct perf_record_id_index)) / |
|
sizeof(struct id_index_entry); |
|
|
|
evlist__for_each_entry(evlist, evsel) |
|
nr += evsel->core.ids; |
|
|
|
n = nr > max_nr ? max_nr : nr; |
|
sz = sizeof(struct perf_record_id_index) + n * sizeof(struct id_index_entry); |
|
ev = zalloc(sz); |
|
if (!ev) |
|
return -ENOMEM; |
|
|
|
ev->id_index.header.type = PERF_RECORD_ID_INDEX; |
|
ev->id_index.header.size = sz; |
|
ev->id_index.nr = n; |
|
|
|
evlist__for_each_entry(evlist, evsel) { |
|
u32 j; |
|
|
|
for (j = 0; j < evsel->core.ids; j++) { |
|
struct id_index_entry *e; |
|
struct perf_sample_id *sid; |
|
|
|
if (i >= n) { |
|
err = process(tool, ev, NULL, machine); |
|
if (err) |
|
goto out_err; |
|
nr -= n; |
|
i = 0; |
|
} |
|
|
|
e = &ev->id_index.entries[i++]; |
|
|
|
e->id = evsel->core.id[j]; |
|
|
|
sid = evlist__id2sid(evlist, e->id); |
|
if (!sid) { |
|
free(ev); |
|
return -ENOENT; |
|
} |
|
|
|
e->idx = sid->idx; |
|
e->cpu = sid->cpu; |
|
e->tid = sid->tid; |
|
} |
|
} |
|
|
|
sz = sizeof(struct perf_record_id_index) + nr * sizeof(struct id_index_entry); |
|
ev->id_index.header.size = sz; |
|
ev->id_index.nr = nr; |
|
|
|
err = process(tool, ev, NULL, machine); |
|
out_err: |
|
free(ev); |
|
|
|
return err; |
|
} |
|
|
|
int __machine__synthesize_threads(struct machine *machine, struct perf_tool *tool, |
|
struct target *target, struct perf_thread_map *threads, |
|
perf_event__handler_t process, bool data_mmap, |
|
unsigned int nr_threads_synthesize) |
|
{ |
|
if (target__has_task(target)) |
|
return perf_event__synthesize_thread_map(tool, threads, process, machine, data_mmap); |
|
else if (target__has_cpu(target)) |
|
return perf_event__synthesize_threads(tool, process, |
|
machine, data_mmap, |
|
nr_threads_synthesize); |
|
/* command specified */ |
|
return 0; |
|
} |
|
|
|
int machine__synthesize_threads(struct machine *machine, struct target *target, |
|
struct perf_thread_map *threads, bool data_mmap, |
|
unsigned int nr_threads_synthesize) |
|
{ |
|
return __machine__synthesize_threads(machine, NULL, target, threads, |
|
perf_event__process, data_mmap, |
|
nr_threads_synthesize); |
|
} |
|
|
|
static struct perf_record_event_update *event_update_event__new(size_t size, u64 type, u64 id) |
|
{ |
|
struct perf_record_event_update *ev; |
|
|
|
size += sizeof(*ev); |
|
size = PERF_ALIGN(size, sizeof(u64)); |
|
|
|
ev = zalloc(size); |
|
if (ev) { |
|
ev->header.type = PERF_RECORD_EVENT_UPDATE; |
|
ev->header.size = (u16)size; |
|
ev->type = type; |
|
ev->id = id; |
|
} |
|
return ev; |
|
} |
|
|
|
int perf_event__synthesize_event_update_unit(struct perf_tool *tool, struct evsel *evsel, |
|
perf_event__handler_t process) |
|
{ |
|
size_t size = strlen(evsel->unit); |
|
struct perf_record_event_update *ev; |
|
int err; |
|
|
|
ev = event_update_event__new(size + 1, PERF_EVENT_UPDATE__UNIT, evsel->core.id[0]); |
|
if (ev == NULL) |
|
return -ENOMEM; |
|
|
|
strlcpy(ev->data, evsel->unit, size + 1); |
|
err = process(tool, (union perf_event *)ev, NULL, NULL); |
|
free(ev); |
|
return err; |
|
} |
|
|
|
int perf_event__synthesize_event_update_scale(struct perf_tool *tool, struct evsel *evsel, |
|
perf_event__handler_t process) |
|
{ |
|
struct perf_record_event_update *ev; |
|
struct perf_record_event_update_scale *ev_data; |
|
int err; |
|
|
|
ev = event_update_event__new(sizeof(*ev_data), PERF_EVENT_UPDATE__SCALE, evsel->core.id[0]); |
|
if (ev == NULL) |
|
return -ENOMEM; |
|
|
|
ev_data = (struct perf_record_event_update_scale *)ev->data; |
|
ev_data->scale = evsel->scale; |
|
err = process(tool, (union perf_event *)ev, NULL, NULL); |
|
free(ev); |
|
return err; |
|
} |
|
|
|
int perf_event__synthesize_event_update_name(struct perf_tool *tool, struct evsel *evsel, |
|
perf_event__handler_t process) |
|
{ |
|
struct perf_record_event_update *ev; |
|
size_t len = strlen(evsel->name); |
|
int err; |
|
|
|
ev = event_update_event__new(len + 1, PERF_EVENT_UPDATE__NAME, evsel->core.id[0]); |
|
if (ev == NULL) |
|
return -ENOMEM; |
|
|
|
strlcpy(ev->data, evsel->name, len + 1); |
|
err = process(tool, (union perf_event *)ev, NULL, NULL); |
|
free(ev); |
|
return err; |
|
} |
|
|
|
int perf_event__synthesize_event_update_cpus(struct perf_tool *tool, struct evsel *evsel, |
|
perf_event__handler_t process) |
|
{ |
|
size_t size = sizeof(struct perf_record_event_update); |
|
struct perf_record_event_update *ev; |
|
int max, err; |
|
u16 type; |
|
|
|
if (!evsel->core.own_cpus) |
|
return 0; |
|
|
|
ev = cpu_map_data__alloc(evsel->core.own_cpus, &size, &type, &max); |
|
if (!ev) |
|
return -ENOMEM; |
|
|
|
ev->header.type = PERF_RECORD_EVENT_UPDATE; |
|
ev->header.size = (u16)size; |
|
ev->type = PERF_EVENT_UPDATE__CPUS; |
|
ev->id = evsel->core.id[0]; |
|
|
|
cpu_map_data__synthesize((struct perf_record_cpu_map_data *)ev->data, |
|
evsel->core.own_cpus, type, max); |
|
|
|
err = process(tool, (union perf_event *)ev, NULL, NULL); |
|
free(ev); |
|
return err; |
|
} |
|
|
|
int perf_event__synthesize_attrs(struct perf_tool *tool, struct evlist *evlist, |
|
perf_event__handler_t process) |
|
{ |
|
struct evsel *evsel; |
|
int err = 0; |
|
|
|
evlist__for_each_entry(evlist, evsel) { |
|
err = perf_event__synthesize_attr(tool, &evsel->core.attr, evsel->core.ids, |
|
evsel->core.id, process); |
|
if (err) { |
|
pr_debug("failed to create perf header attribute\n"); |
|
return err; |
|
} |
|
} |
|
|
|
return err; |
|
} |
|
|
|
static bool has_unit(struct evsel *evsel) |
|
{ |
|
return evsel->unit && *evsel->unit; |
|
} |
|
|
|
static bool has_scale(struct evsel *evsel) |
|
{ |
|
return evsel->scale != 1; |
|
} |
|
|
|
int perf_event__synthesize_extra_attr(struct perf_tool *tool, struct evlist *evsel_list, |
|
perf_event__handler_t process, bool is_pipe) |
|
{ |
|
struct evsel *evsel; |
|
int err; |
|
|
|
/* |
|
* Synthesize other events stuff not carried within |
|
* attr event - unit, scale, name |
|
*/ |
|
evlist__for_each_entry(evsel_list, evsel) { |
|
if (!evsel->supported) |
|
continue; |
|
|
|
/* |
|
* Synthesize unit and scale only if it's defined. |
|
*/ |
|
if (has_unit(evsel)) { |
|
err = perf_event__synthesize_event_update_unit(tool, evsel, process); |
|
if (err < 0) { |
|
pr_err("Couldn't synthesize evsel unit.\n"); |
|
return err; |
|
} |
|
} |
|
|
|
if (has_scale(evsel)) { |
|
err = perf_event__synthesize_event_update_scale(tool, evsel, process); |
|
if (err < 0) { |
|
pr_err("Couldn't synthesize evsel evsel.\n"); |
|
return err; |
|
} |
|
} |
|
|
|
if (evsel->core.own_cpus) { |
|
err = perf_event__synthesize_event_update_cpus(tool, evsel, process); |
|
if (err < 0) { |
|
pr_err("Couldn't synthesize evsel cpus.\n"); |
|
return err; |
|
} |
|
} |
|
|
|
/* |
|
* Name is needed only for pipe output, |
|
* perf.data carries event names. |
|
*/ |
|
if (is_pipe) { |
|
err = perf_event__synthesize_event_update_name(tool, evsel, process); |
|
if (err < 0) { |
|
pr_err("Couldn't synthesize evsel name.\n"); |
|
return err; |
|
} |
|
} |
|
} |
|
return 0; |
|
} |
|
|
|
int perf_event__synthesize_attr(struct perf_tool *tool, struct perf_event_attr *attr, |
|
u32 ids, u64 *id, perf_event__handler_t process) |
|
{ |
|
union perf_event *ev; |
|
size_t size; |
|
int err; |
|
|
|
size = sizeof(struct perf_event_attr); |
|
size = PERF_ALIGN(size, sizeof(u64)); |
|
size += sizeof(struct perf_event_header); |
|
size += ids * sizeof(u64); |
|
|
|
ev = zalloc(size); |
|
|
|
if (ev == NULL) |
|
return -ENOMEM; |
|
|
|
ev->attr.attr = *attr; |
|
memcpy(ev->attr.id, id, ids * sizeof(u64)); |
|
|
|
ev->attr.header.type = PERF_RECORD_HEADER_ATTR; |
|
ev->attr.header.size = (u16)size; |
|
|
|
if (ev->attr.header.size == size) |
|
err = process(tool, ev, NULL, NULL); |
|
else |
|
err = -E2BIG; |
|
|
|
free(ev); |
|
|
|
return err; |
|
} |
|
|
|
int perf_event__synthesize_tracing_data(struct perf_tool *tool, int fd, struct evlist *evlist, |
|
perf_event__handler_t process) |
|
{ |
|
union perf_event ev; |
|
struct tracing_data *tdata; |
|
ssize_t size = 0, aligned_size = 0, padding; |
|
struct feat_fd ff; |
|
|
|
/* |
|
* We are going to store the size of the data followed |
|
* by the data contents. Since the fd descriptor is a pipe, |
|
* we cannot seek back to store the size of the data once |
|
* we know it. Instead we: |
|
* |
|
* - write the tracing data to the temp file |
|
* - get/write the data size to pipe |
|
* - write the tracing data from the temp file |
|
* to the pipe |
|
*/ |
|
tdata = tracing_data_get(&evlist->core.entries, fd, true); |
|
if (!tdata) |
|
return -1; |
|
|
|
memset(&ev, 0, sizeof(ev)); |
|
|
|
ev.tracing_data.header.type = PERF_RECORD_HEADER_TRACING_DATA; |
|
size = tdata->size; |
|
aligned_size = PERF_ALIGN(size, sizeof(u64)); |
|
padding = aligned_size - size; |
|
ev.tracing_data.header.size = sizeof(ev.tracing_data); |
|
ev.tracing_data.size = aligned_size; |
|
|
|
process(tool, &ev, NULL, NULL); |
|
|
|
/* |
|
* The put function will copy all the tracing data |
|
* stored in temp file to the pipe. |
|
*/ |
|
tracing_data_put(tdata); |
|
|
|
ff = (struct feat_fd){ .fd = fd }; |
|
if (write_padded(&ff, NULL, 0, padding)) |
|
return -1; |
|
|
|
return aligned_size; |
|
} |
|
|
|
int perf_event__synthesize_build_id(struct perf_tool *tool, struct dso *pos, u16 misc, |
|
perf_event__handler_t process, struct machine *machine) |
|
{ |
|
union perf_event ev; |
|
size_t len; |
|
|
|
if (!pos->hit) |
|
return 0; |
|
|
|
memset(&ev, 0, sizeof(ev)); |
|
|
|
len = pos->long_name_len + 1; |
|
len = PERF_ALIGN(len, NAME_ALIGN); |
|
memcpy(&ev.build_id.build_id, pos->bid.data, sizeof(pos->bid.data)); |
|
ev.build_id.header.type = PERF_RECORD_HEADER_BUILD_ID; |
|
ev.build_id.header.misc = misc; |
|
ev.build_id.pid = machine->pid; |
|
ev.build_id.header.size = sizeof(ev.build_id) + len; |
|
memcpy(&ev.build_id.filename, pos->long_name, pos->long_name_len); |
|
|
|
return process(tool, &ev, NULL, machine); |
|
} |
|
|
|
int perf_event__synthesize_stat_events(struct perf_stat_config *config, struct perf_tool *tool, |
|
struct evlist *evlist, perf_event__handler_t process, bool attrs) |
|
{ |
|
int err; |
|
|
|
if (attrs) { |
|
err = perf_event__synthesize_attrs(tool, evlist, process); |
|
if (err < 0) { |
|
pr_err("Couldn't synthesize attrs.\n"); |
|
return err; |
|
} |
|
} |
|
|
|
err = perf_event__synthesize_extra_attr(tool, evlist, process, attrs); |
|
err = perf_event__synthesize_thread_map2(tool, evlist->core.threads, process, NULL); |
|
if (err < 0) { |
|
pr_err("Couldn't synthesize thread map.\n"); |
|
return err; |
|
} |
|
|
|
err = perf_event__synthesize_cpu_map(tool, evlist->core.cpus, process, NULL); |
|
if (err < 0) { |
|
pr_err("Couldn't synthesize thread map.\n"); |
|
return err; |
|
} |
|
|
|
err = perf_event__synthesize_stat_config(tool, config, process, NULL); |
|
if (err < 0) { |
|
pr_err("Couldn't synthesize config.\n"); |
|
return err; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
extern const struct perf_header_feature_ops feat_ops[HEADER_LAST_FEATURE]; |
|
|
|
int perf_event__synthesize_features(struct perf_tool *tool, struct perf_session *session, |
|
struct evlist *evlist, perf_event__handler_t process) |
|
{ |
|
struct perf_header *header = &session->header; |
|
struct perf_record_header_feature *fe; |
|
struct feat_fd ff; |
|
size_t sz, sz_hdr; |
|
int feat, ret; |
|
|
|
sz_hdr = sizeof(fe->header); |
|
sz = sizeof(union perf_event); |
|
/* get a nice alignment */ |
|
sz = PERF_ALIGN(sz, page_size); |
|
|
|
memset(&ff, 0, sizeof(ff)); |
|
|
|
ff.buf = malloc(sz); |
|
if (!ff.buf) |
|
return -ENOMEM; |
|
|
|
ff.size = sz - sz_hdr; |
|
ff.ph = &session->header; |
|
|
|
for_each_set_bit(feat, header->adds_features, HEADER_FEAT_BITS) { |
|
if (!feat_ops[feat].synthesize) { |
|
pr_debug("No record header feature for header :%d\n", feat); |
|
continue; |
|
} |
|
|
|
ff.offset = sizeof(*fe); |
|
|
|
ret = feat_ops[feat].write(&ff, evlist); |
|
if (ret || ff.offset <= (ssize_t)sizeof(*fe)) { |
|
pr_debug("Error writing feature\n"); |
|
continue; |
|
} |
|
/* ff.buf may have changed due to realloc in do_write() */ |
|
fe = ff.buf; |
|
memset(fe, 0, sizeof(*fe)); |
|
|
|
fe->feat_id = feat; |
|
fe->header.type = PERF_RECORD_HEADER_FEATURE; |
|
fe->header.size = ff.offset; |
|
|
|
ret = process(tool, ff.buf, NULL, NULL); |
|
if (ret) { |
|
free(ff.buf); |
|
return ret; |
|
} |
|
} |
|
|
|
/* Send HEADER_LAST_FEATURE mark. */ |
|
fe = ff.buf; |
|
fe->feat_id = HEADER_LAST_FEATURE; |
|
fe->header.type = PERF_RECORD_HEADER_FEATURE; |
|
fe->header.size = sizeof(*fe); |
|
|
|
ret = process(tool, ff.buf, NULL, NULL); |
|
|
|
free(ff.buf); |
|
return ret; |
|
} |
|
|
|
int perf_event__synthesize_for_pipe(struct perf_tool *tool, |
|
struct perf_session *session, |
|
struct perf_data *data, |
|
perf_event__handler_t process) |
|
{ |
|
int err; |
|
int ret = 0; |
|
struct evlist *evlist = session->evlist; |
|
|
|
/* |
|
* We need to synthesize events first, because some |
|
* features works on top of them (on report side). |
|
*/ |
|
err = perf_event__synthesize_attrs(tool, evlist, process); |
|
if (err < 0) { |
|
pr_err("Couldn't synthesize attrs.\n"); |
|
return err; |
|
} |
|
ret += err; |
|
|
|
err = perf_event__synthesize_features(tool, session, evlist, process); |
|
if (err < 0) { |
|
pr_err("Couldn't synthesize features.\n"); |
|
return err; |
|
} |
|
ret += err; |
|
|
|
if (have_tracepoints(&evlist->core.entries)) { |
|
int fd = perf_data__fd(data); |
|
|
|
/* |
|
* FIXME err <= 0 here actually means that |
|
* there were no tracepoints so its not really |
|
* an error, just that we don't need to |
|
* synthesize anything. We really have to |
|
* return this more properly and also |
|
* propagate errors that now are calling die() |
|
*/ |
|
err = perf_event__synthesize_tracing_data(tool, fd, evlist, |
|
process); |
|
if (err <= 0) { |
|
pr_err("Couldn't record tracing data.\n"); |
|
return err; |
|
} |
|
ret += err; |
|
} |
|
|
|
return ret; |
|
}
|
|
|