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848 lines
26 KiB
848 lines
26 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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#ifndef _LINUX_TRACE_EVENT_H |
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#define _LINUX_TRACE_EVENT_H |
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#include <linux/ring_buffer.h> |
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#include <linux/trace_seq.h> |
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#include <linux/percpu.h> |
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#include <linux/hardirq.h> |
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#include <linux/perf_event.h> |
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#include <linux/tracepoint.h> |
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struct trace_array; |
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struct array_buffer; |
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struct tracer; |
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struct dentry; |
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struct bpf_prog; |
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const char *trace_print_flags_seq(struct trace_seq *p, const char *delim, |
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unsigned long flags, |
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const struct trace_print_flags *flag_array); |
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const char *trace_print_symbols_seq(struct trace_seq *p, unsigned long val, |
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const struct trace_print_flags *symbol_array); |
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#if BITS_PER_LONG == 32 |
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const char *trace_print_flags_seq_u64(struct trace_seq *p, const char *delim, |
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unsigned long long flags, |
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const struct trace_print_flags_u64 *flag_array); |
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const char *trace_print_symbols_seq_u64(struct trace_seq *p, |
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unsigned long long val, |
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const struct trace_print_flags_u64 |
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*symbol_array); |
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#endif |
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const char *trace_print_bitmask_seq(struct trace_seq *p, void *bitmask_ptr, |
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unsigned int bitmask_size); |
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const char *trace_print_hex_seq(struct trace_seq *p, |
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const unsigned char *buf, int len, |
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bool concatenate); |
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const char *trace_print_array_seq(struct trace_seq *p, |
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const void *buf, int count, |
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size_t el_size); |
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const char * |
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trace_print_hex_dump_seq(struct trace_seq *p, const char *prefix_str, |
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int prefix_type, int rowsize, int groupsize, |
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const void *buf, size_t len, bool ascii); |
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struct trace_iterator; |
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struct trace_event; |
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int trace_raw_output_prep(struct trace_iterator *iter, |
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struct trace_event *event); |
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extern __printf(2, 3) |
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void trace_event_printf(struct trace_iterator *iter, const char *fmt, ...); |
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/* |
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* The trace entry - the most basic unit of tracing. This is what |
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* is printed in the end as a single line in the trace output, such as: |
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* |
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* bash-15816 [01] 235.197585: idle_cpu <- irq_enter |
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*/ |
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struct trace_entry { |
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unsigned short type; |
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unsigned char flags; |
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unsigned char preempt_count; |
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int pid; |
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}; |
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#define TRACE_EVENT_TYPE_MAX \ |
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((1 << (sizeof(((struct trace_entry *)0)->type) * 8)) - 1) |
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/* |
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* Trace iterator - used by printout routines who present trace |
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* results to users and which routines might sleep, etc: |
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*/ |
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struct trace_iterator { |
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struct trace_array *tr; |
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struct tracer *trace; |
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struct array_buffer *array_buffer; |
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void *private; |
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int cpu_file; |
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struct mutex mutex; |
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struct ring_buffer_iter **buffer_iter; |
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unsigned long iter_flags; |
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void *temp; /* temp holder */ |
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unsigned int temp_size; |
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char *fmt; /* modified format holder */ |
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unsigned int fmt_size; |
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/* trace_seq for __print_flags() and __print_symbolic() etc. */ |
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struct trace_seq tmp_seq; |
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cpumask_var_t started; |
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/* it's true when current open file is snapshot */ |
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bool snapshot; |
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/* The below is zeroed out in pipe_read */ |
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struct trace_seq seq; |
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struct trace_entry *ent; |
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unsigned long lost_events; |
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int leftover; |
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int ent_size; |
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int cpu; |
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u64 ts; |
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loff_t pos; |
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long idx; |
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/* All new field here will be zeroed out in pipe_read */ |
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}; |
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enum trace_iter_flags { |
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TRACE_FILE_LAT_FMT = 1, |
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TRACE_FILE_ANNOTATE = 2, |
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TRACE_FILE_TIME_IN_NS = 4, |
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}; |
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typedef enum print_line_t (*trace_print_func)(struct trace_iterator *iter, |
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int flags, struct trace_event *event); |
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struct trace_event_functions { |
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trace_print_func trace; |
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trace_print_func raw; |
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trace_print_func hex; |
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trace_print_func binary; |
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}; |
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struct trace_event { |
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struct hlist_node node; |
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struct list_head list; |
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int type; |
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struct trace_event_functions *funcs; |
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}; |
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extern int register_trace_event(struct trace_event *event); |
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extern int unregister_trace_event(struct trace_event *event); |
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/* Return values for print_line callback */ |
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enum print_line_t { |
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TRACE_TYPE_PARTIAL_LINE = 0, /* Retry after flushing the seq */ |
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TRACE_TYPE_HANDLED = 1, |
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TRACE_TYPE_UNHANDLED = 2, /* Relay to other output functions */ |
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TRACE_TYPE_NO_CONSUME = 3 /* Handled but ask to not consume */ |
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}; |
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enum print_line_t trace_handle_return(struct trace_seq *s); |
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static inline void tracing_generic_entry_update(struct trace_entry *entry, |
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unsigned short type, |
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unsigned int trace_ctx) |
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{ |
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entry->preempt_count = trace_ctx & 0xff; |
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entry->pid = current->pid; |
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entry->type = type; |
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entry->flags = trace_ctx >> 16; |
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} |
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unsigned int tracing_gen_ctx_irq_test(unsigned int irqs_status); |
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enum trace_flag_type { |
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TRACE_FLAG_IRQS_OFF = 0x01, |
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TRACE_FLAG_IRQS_NOSUPPORT = 0x02, |
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TRACE_FLAG_NEED_RESCHED = 0x04, |
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TRACE_FLAG_HARDIRQ = 0x08, |
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TRACE_FLAG_SOFTIRQ = 0x10, |
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TRACE_FLAG_PREEMPT_RESCHED = 0x20, |
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TRACE_FLAG_NMI = 0x40, |
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}; |
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#ifdef CONFIG_TRACE_IRQFLAGS_SUPPORT |
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static inline unsigned int tracing_gen_ctx_flags(unsigned long irqflags) |
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{ |
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unsigned int irq_status = irqs_disabled_flags(irqflags) ? |
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TRACE_FLAG_IRQS_OFF : 0; |
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return tracing_gen_ctx_irq_test(irq_status); |
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} |
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static inline unsigned int tracing_gen_ctx(void) |
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{ |
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unsigned long irqflags; |
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local_save_flags(irqflags); |
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return tracing_gen_ctx_flags(irqflags); |
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} |
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#else |
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static inline unsigned int tracing_gen_ctx_flags(unsigned long irqflags) |
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{ |
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return tracing_gen_ctx_irq_test(TRACE_FLAG_IRQS_NOSUPPORT); |
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} |
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static inline unsigned int tracing_gen_ctx(void) |
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{ |
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return tracing_gen_ctx_irq_test(TRACE_FLAG_IRQS_NOSUPPORT); |
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} |
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#endif |
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static inline unsigned int tracing_gen_ctx_dec(void) |
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{ |
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unsigned int trace_ctx; |
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trace_ctx = tracing_gen_ctx(); |
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/* |
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* Subtract one from the preeption counter if preemption is enabled, |
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* see trace_event_buffer_reserve()for details. |
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*/ |
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if (IS_ENABLED(CONFIG_PREEMPTION)) |
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trace_ctx--; |
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return trace_ctx; |
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} |
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struct trace_event_file; |
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struct ring_buffer_event * |
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trace_event_buffer_lock_reserve(struct trace_buffer **current_buffer, |
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struct trace_event_file *trace_file, |
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int type, unsigned long len, |
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unsigned int trace_ctx); |
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#define TRACE_RECORD_CMDLINE BIT(0) |
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#define TRACE_RECORD_TGID BIT(1) |
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void tracing_record_taskinfo(struct task_struct *task, int flags); |
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void tracing_record_taskinfo_sched_switch(struct task_struct *prev, |
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struct task_struct *next, int flags); |
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void tracing_record_cmdline(struct task_struct *task); |
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void tracing_record_tgid(struct task_struct *task); |
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int trace_output_call(struct trace_iterator *iter, char *name, char *fmt, ...); |
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struct event_filter; |
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enum trace_reg { |
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TRACE_REG_REGISTER, |
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TRACE_REG_UNREGISTER, |
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#ifdef CONFIG_PERF_EVENTS |
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TRACE_REG_PERF_REGISTER, |
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TRACE_REG_PERF_UNREGISTER, |
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TRACE_REG_PERF_OPEN, |
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TRACE_REG_PERF_CLOSE, |
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/* |
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* These (ADD/DEL) use a 'boolean' return value, where 1 (true) means a |
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* custom action was taken and the default action is not to be |
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* performed. |
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*/ |
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TRACE_REG_PERF_ADD, |
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TRACE_REG_PERF_DEL, |
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#endif |
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}; |
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struct trace_event_call; |
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#define TRACE_FUNCTION_TYPE ((const char *)~0UL) |
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struct trace_event_fields { |
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const char *type; |
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union { |
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struct { |
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const char *name; |
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const int size; |
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const int align; |
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const int is_signed; |
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const int filter_type; |
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}; |
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int (*define_fields)(struct trace_event_call *); |
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}; |
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}; |
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struct trace_event_class { |
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const char *system; |
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void *probe; |
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#ifdef CONFIG_PERF_EVENTS |
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void *perf_probe; |
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#endif |
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int (*reg)(struct trace_event_call *event, |
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enum trace_reg type, void *data); |
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struct trace_event_fields *fields_array; |
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struct list_head *(*get_fields)(struct trace_event_call *); |
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struct list_head fields; |
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int (*raw_init)(struct trace_event_call *); |
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}; |
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extern int trace_event_reg(struct trace_event_call *event, |
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enum trace_reg type, void *data); |
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struct trace_event_buffer { |
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struct trace_buffer *buffer; |
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struct ring_buffer_event *event; |
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struct trace_event_file *trace_file; |
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void *entry; |
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unsigned int trace_ctx; |
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struct pt_regs *regs; |
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}; |
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void *trace_event_buffer_reserve(struct trace_event_buffer *fbuffer, |
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struct trace_event_file *trace_file, |
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unsigned long len); |
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void trace_event_buffer_commit(struct trace_event_buffer *fbuffer); |
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enum { |
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TRACE_EVENT_FL_FILTERED_BIT, |
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TRACE_EVENT_FL_CAP_ANY_BIT, |
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TRACE_EVENT_FL_NO_SET_FILTER_BIT, |
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TRACE_EVENT_FL_IGNORE_ENABLE_BIT, |
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TRACE_EVENT_FL_TRACEPOINT_BIT, |
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TRACE_EVENT_FL_KPROBE_BIT, |
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TRACE_EVENT_FL_UPROBE_BIT, |
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}; |
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/* |
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* Event flags: |
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* FILTERED - The event has a filter attached |
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* CAP_ANY - Any user can enable for perf |
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* NO_SET_FILTER - Set when filter has error and is to be ignored |
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* IGNORE_ENABLE - For trace internal events, do not enable with debugfs file |
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* TRACEPOINT - Event is a tracepoint |
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* KPROBE - Event is a kprobe |
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* UPROBE - Event is a uprobe |
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*/ |
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enum { |
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TRACE_EVENT_FL_FILTERED = (1 << TRACE_EVENT_FL_FILTERED_BIT), |
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TRACE_EVENT_FL_CAP_ANY = (1 << TRACE_EVENT_FL_CAP_ANY_BIT), |
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TRACE_EVENT_FL_NO_SET_FILTER = (1 << TRACE_EVENT_FL_NO_SET_FILTER_BIT), |
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TRACE_EVENT_FL_IGNORE_ENABLE = (1 << TRACE_EVENT_FL_IGNORE_ENABLE_BIT), |
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TRACE_EVENT_FL_TRACEPOINT = (1 << TRACE_EVENT_FL_TRACEPOINT_BIT), |
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TRACE_EVENT_FL_KPROBE = (1 << TRACE_EVENT_FL_KPROBE_BIT), |
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TRACE_EVENT_FL_UPROBE = (1 << TRACE_EVENT_FL_UPROBE_BIT), |
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}; |
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#define TRACE_EVENT_FL_UKPROBE (TRACE_EVENT_FL_KPROBE | TRACE_EVENT_FL_UPROBE) |
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struct trace_event_call { |
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struct list_head list; |
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struct trace_event_class *class; |
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union { |
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char *name; |
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/* Set TRACE_EVENT_FL_TRACEPOINT flag when using "tp" */ |
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struct tracepoint *tp; |
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}; |
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struct trace_event event; |
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char *print_fmt; |
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struct event_filter *filter; |
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void *mod; |
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void *data; |
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/* See the TRACE_EVENT_FL_* flags above */ |
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int flags; /* static flags of different events */ |
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#ifdef CONFIG_PERF_EVENTS |
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int perf_refcount; |
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struct hlist_head __percpu *perf_events; |
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struct bpf_prog_array __rcu *prog_array; |
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int (*perf_perm)(struct trace_event_call *, |
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struct perf_event *); |
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#endif |
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}; |
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#ifdef CONFIG_PERF_EVENTS |
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static inline bool bpf_prog_array_valid(struct trace_event_call *call) |
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{ |
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/* |
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* This inline function checks whether call->prog_array |
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* is valid or not. The function is called in various places, |
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* outside rcu_read_lock/unlock, as a heuristic to speed up execution. |
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* |
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* If this function returns true, and later call->prog_array |
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* becomes false inside rcu_read_lock/unlock region, |
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* we bail out then. If this function return false, |
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* there is a risk that we might miss a few events if the checking |
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* were delayed until inside rcu_read_lock/unlock region and |
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* call->prog_array happened to become non-NULL then. |
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* |
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* Here, READ_ONCE() is used instead of rcu_access_pointer(). |
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* rcu_access_pointer() requires the actual definition of |
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* "struct bpf_prog_array" while READ_ONCE() only needs |
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* a declaration of the same type. |
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*/ |
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return !!READ_ONCE(call->prog_array); |
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} |
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#endif |
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static inline const char * |
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trace_event_name(struct trace_event_call *call) |
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{ |
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if (call->flags & TRACE_EVENT_FL_TRACEPOINT) |
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return call->tp ? call->tp->name : NULL; |
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else |
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return call->name; |
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} |
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static inline struct list_head * |
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trace_get_fields(struct trace_event_call *event_call) |
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{ |
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if (!event_call->class->get_fields) |
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return &event_call->class->fields; |
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return event_call->class->get_fields(event_call); |
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} |
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struct trace_array; |
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struct trace_subsystem_dir; |
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enum { |
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EVENT_FILE_FL_ENABLED_BIT, |
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EVENT_FILE_FL_RECORDED_CMD_BIT, |
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EVENT_FILE_FL_RECORDED_TGID_BIT, |
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EVENT_FILE_FL_FILTERED_BIT, |
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EVENT_FILE_FL_NO_SET_FILTER_BIT, |
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EVENT_FILE_FL_SOFT_MODE_BIT, |
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EVENT_FILE_FL_SOFT_DISABLED_BIT, |
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EVENT_FILE_FL_TRIGGER_MODE_BIT, |
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EVENT_FILE_FL_TRIGGER_COND_BIT, |
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EVENT_FILE_FL_PID_FILTER_BIT, |
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EVENT_FILE_FL_WAS_ENABLED_BIT, |
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}; |
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extern struct trace_event_file *trace_get_event_file(const char *instance, |
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const char *system, |
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const char *event); |
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extern void trace_put_event_file(struct trace_event_file *file); |
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#define MAX_DYNEVENT_CMD_LEN (2048) |
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enum dynevent_type { |
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DYNEVENT_TYPE_SYNTH = 1, |
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DYNEVENT_TYPE_KPROBE, |
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DYNEVENT_TYPE_NONE, |
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}; |
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struct dynevent_cmd; |
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typedef int (*dynevent_create_fn_t)(struct dynevent_cmd *cmd); |
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struct dynevent_cmd { |
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struct seq_buf seq; |
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const char *event_name; |
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unsigned int n_fields; |
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enum dynevent_type type; |
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dynevent_create_fn_t run_command; |
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void *private_data; |
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}; |
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extern int dynevent_create(struct dynevent_cmd *cmd); |
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extern int synth_event_delete(const char *name); |
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extern void synth_event_cmd_init(struct dynevent_cmd *cmd, |
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char *buf, int maxlen); |
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extern int __synth_event_gen_cmd_start(struct dynevent_cmd *cmd, |
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const char *name, |
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struct module *mod, ...); |
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#define synth_event_gen_cmd_start(cmd, name, mod, ...) \ |
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__synth_event_gen_cmd_start(cmd, name, mod, ## __VA_ARGS__, NULL) |
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struct synth_field_desc { |
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const char *type; |
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const char *name; |
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}; |
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extern int synth_event_gen_cmd_array_start(struct dynevent_cmd *cmd, |
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const char *name, |
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struct module *mod, |
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struct synth_field_desc *fields, |
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unsigned int n_fields); |
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extern int synth_event_create(const char *name, |
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struct synth_field_desc *fields, |
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unsigned int n_fields, struct module *mod); |
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extern int synth_event_add_field(struct dynevent_cmd *cmd, |
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const char *type, |
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const char *name); |
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extern int synth_event_add_field_str(struct dynevent_cmd *cmd, |
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const char *type_name); |
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extern int synth_event_add_fields(struct dynevent_cmd *cmd, |
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struct synth_field_desc *fields, |
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unsigned int n_fields); |
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#define synth_event_gen_cmd_end(cmd) \ |
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dynevent_create(cmd) |
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struct synth_event; |
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struct synth_event_trace_state { |
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struct trace_event_buffer fbuffer; |
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struct synth_trace_event *entry; |
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struct trace_buffer *buffer; |
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struct synth_event *event; |
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unsigned int cur_field; |
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unsigned int n_u64; |
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bool disabled; |
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bool add_next; |
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bool add_name; |
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}; |
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extern int synth_event_trace(struct trace_event_file *file, |
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unsigned int n_vals, ...); |
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extern int synth_event_trace_array(struct trace_event_file *file, u64 *vals, |
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unsigned int n_vals); |
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extern int synth_event_trace_start(struct trace_event_file *file, |
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struct synth_event_trace_state *trace_state); |
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extern int synth_event_add_next_val(u64 val, |
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struct synth_event_trace_state *trace_state); |
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extern int synth_event_add_val(const char *field_name, u64 val, |
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struct synth_event_trace_state *trace_state); |
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extern int synth_event_trace_end(struct synth_event_trace_state *trace_state); |
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extern int kprobe_event_delete(const char *name); |
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extern void kprobe_event_cmd_init(struct dynevent_cmd *cmd, |
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char *buf, int maxlen); |
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#define kprobe_event_gen_cmd_start(cmd, name, loc, ...) \ |
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__kprobe_event_gen_cmd_start(cmd, false, name, loc, ## __VA_ARGS__, NULL) |
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#define kretprobe_event_gen_cmd_start(cmd, name, loc, ...) \ |
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__kprobe_event_gen_cmd_start(cmd, true, name, loc, ## __VA_ARGS__, NULL) |
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extern int __kprobe_event_gen_cmd_start(struct dynevent_cmd *cmd, |
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bool kretprobe, |
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const char *name, |
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const char *loc, ...); |
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#define kprobe_event_add_fields(cmd, ...) \ |
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__kprobe_event_add_fields(cmd, ## __VA_ARGS__, NULL) |
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#define kprobe_event_add_field(cmd, field) \ |
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__kprobe_event_add_fields(cmd, field, NULL) |
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extern int __kprobe_event_add_fields(struct dynevent_cmd *cmd, ...); |
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#define kprobe_event_gen_cmd_end(cmd) \ |
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dynevent_create(cmd) |
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#define kretprobe_event_gen_cmd_end(cmd) \ |
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dynevent_create(cmd) |
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/* |
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* Event file flags: |
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* ENABLED - The event is enabled |
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* RECORDED_CMD - The comms should be recorded at sched_switch |
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* RECORDED_TGID - The tgids should be recorded at sched_switch |
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* FILTERED - The event has a filter attached |
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* NO_SET_FILTER - Set when filter has error and is to be ignored |
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* SOFT_MODE - The event is enabled/disabled by SOFT_DISABLED |
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* SOFT_DISABLED - When set, do not trace the event (even though its |
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* tracepoint may be enabled) |
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* TRIGGER_MODE - When set, invoke the triggers associated with the event |
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* TRIGGER_COND - When set, one or more triggers has an associated filter |
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* PID_FILTER - When set, the event is filtered based on pid |
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* WAS_ENABLED - Set when enabled to know to clear trace on module removal |
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*/ |
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enum { |
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EVENT_FILE_FL_ENABLED = (1 << EVENT_FILE_FL_ENABLED_BIT), |
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EVENT_FILE_FL_RECORDED_CMD = (1 << EVENT_FILE_FL_RECORDED_CMD_BIT), |
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EVENT_FILE_FL_RECORDED_TGID = (1 << EVENT_FILE_FL_RECORDED_TGID_BIT), |
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EVENT_FILE_FL_FILTERED = (1 << EVENT_FILE_FL_FILTERED_BIT), |
|
EVENT_FILE_FL_NO_SET_FILTER = (1 << EVENT_FILE_FL_NO_SET_FILTER_BIT), |
|
EVENT_FILE_FL_SOFT_MODE = (1 << EVENT_FILE_FL_SOFT_MODE_BIT), |
|
EVENT_FILE_FL_SOFT_DISABLED = (1 << EVENT_FILE_FL_SOFT_DISABLED_BIT), |
|
EVENT_FILE_FL_TRIGGER_MODE = (1 << EVENT_FILE_FL_TRIGGER_MODE_BIT), |
|
EVENT_FILE_FL_TRIGGER_COND = (1 << EVENT_FILE_FL_TRIGGER_COND_BIT), |
|
EVENT_FILE_FL_PID_FILTER = (1 << EVENT_FILE_FL_PID_FILTER_BIT), |
|
EVENT_FILE_FL_WAS_ENABLED = (1 << EVENT_FILE_FL_WAS_ENABLED_BIT), |
|
}; |
|
|
|
struct trace_event_file { |
|
struct list_head list; |
|
struct trace_event_call *event_call; |
|
struct event_filter __rcu *filter; |
|
struct dentry *dir; |
|
struct trace_array *tr; |
|
struct trace_subsystem_dir *system; |
|
struct list_head triggers; |
|
|
|
/* |
|
* 32 bit flags: |
|
* bit 0: enabled |
|
* bit 1: enabled cmd record |
|
* bit 2: enable/disable with the soft disable bit |
|
* bit 3: soft disabled |
|
* bit 4: trigger enabled |
|
* |
|
* Note: The bits must be set atomically to prevent races |
|
* from other writers. Reads of flags do not need to be in |
|
* sync as they occur in critical sections. But the way flags |
|
* is currently used, these changes do not affect the code |
|
* except that when a change is made, it may have a slight |
|
* delay in propagating the changes to other CPUs due to |
|
* caching and such. Which is mostly OK ;-) |
|
*/ |
|
unsigned long flags; |
|
atomic_t sm_ref; /* soft-mode reference counter */ |
|
atomic_t tm_ref; /* trigger-mode reference counter */ |
|
}; |
|
|
|
#define __TRACE_EVENT_FLAGS(name, value) \ |
|
static int __init trace_init_flags_##name(void) \ |
|
{ \ |
|
event_##name.flags |= value; \ |
|
return 0; \ |
|
} \ |
|
early_initcall(trace_init_flags_##name); |
|
|
|
#define __TRACE_EVENT_PERF_PERM(name, expr...) \ |
|
static int perf_perm_##name(struct trace_event_call *tp_event, \ |
|
struct perf_event *p_event) \ |
|
{ \ |
|
return ({ expr; }); \ |
|
} \ |
|
static int __init trace_init_perf_perm_##name(void) \ |
|
{ \ |
|
event_##name.perf_perm = &perf_perm_##name; \ |
|
return 0; \ |
|
} \ |
|
early_initcall(trace_init_perf_perm_##name); |
|
|
|
#define PERF_MAX_TRACE_SIZE 2048 |
|
|
|
#define MAX_FILTER_STR_VAL 256 /* Should handle KSYM_SYMBOL_LEN */ |
|
|
|
enum event_trigger_type { |
|
ETT_NONE = (0), |
|
ETT_TRACE_ONOFF = (1 << 0), |
|
ETT_SNAPSHOT = (1 << 1), |
|
ETT_STACKTRACE = (1 << 2), |
|
ETT_EVENT_ENABLE = (1 << 3), |
|
ETT_EVENT_HIST = (1 << 4), |
|
ETT_HIST_ENABLE = (1 << 5), |
|
}; |
|
|
|
extern int filter_match_preds(struct event_filter *filter, void *rec); |
|
|
|
extern enum event_trigger_type |
|
event_triggers_call(struct trace_event_file *file, void *rec, |
|
struct ring_buffer_event *event); |
|
extern void |
|
event_triggers_post_call(struct trace_event_file *file, |
|
enum event_trigger_type tt); |
|
|
|
bool trace_event_ignore_this_pid(struct trace_event_file *trace_file); |
|
|
|
/** |
|
* trace_trigger_soft_disabled - do triggers and test if soft disabled |
|
* @file: The file pointer of the event to test |
|
* |
|
* If any triggers without filters are attached to this event, they |
|
* will be called here. If the event is soft disabled and has no |
|
* triggers that require testing the fields, it will return true, |
|
* otherwise false. |
|
*/ |
|
static inline bool |
|
trace_trigger_soft_disabled(struct trace_event_file *file) |
|
{ |
|
unsigned long eflags = file->flags; |
|
|
|
if (!(eflags & EVENT_FILE_FL_TRIGGER_COND)) { |
|
if (eflags & EVENT_FILE_FL_TRIGGER_MODE) |
|
event_triggers_call(file, NULL, NULL); |
|
if (eflags & EVENT_FILE_FL_SOFT_DISABLED) |
|
return true; |
|
if (eflags & EVENT_FILE_FL_PID_FILTER) |
|
return trace_event_ignore_this_pid(file); |
|
} |
|
return false; |
|
} |
|
|
|
#ifdef CONFIG_BPF_EVENTS |
|
unsigned int trace_call_bpf(struct trace_event_call *call, void *ctx); |
|
int perf_event_attach_bpf_prog(struct perf_event *event, struct bpf_prog *prog); |
|
void perf_event_detach_bpf_prog(struct perf_event *event); |
|
int perf_event_query_prog_array(struct perf_event *event, void __user *info); |
|
int bpf_probe_register(struct bpf_raw_event_map *btp, struct bpf_prog *prog); |
|
int bpf_probe_unregister(struct bpf_raw_event_map *btp, struct bpf_prog *prog); |
|
struct bpf_raw_event_map *bpf_get_raw_tracepoint(const char *name); |
|
void bpf_put_raw_tracepoint(struct bpf_raw_event_map *btp); |
|
int bpf_get_perf_event_info(const struct perf_event *event, u32 *prog_id, |
|
u32 *fd_type, const char **buf, |
|
u64 *probe_offset, u64 *probe_addr); |
|
#else |
|
static inline unsigned int trace_call_bpf(struct trace_event_call *call, void *ctx) |
|
{ |
|
return 1; |
|
} |
|
|
|
static inline int |
|
perf_event_attach_bpf_prog(struct perf_event *event, struct bpf_prog *prog) |
|
{ |
|
return -EOPNOTSUPP; |
|
} |
|
|
|
static inline void perf_event_detach_bpf_prog(struct perf_event *event) { } |
|
|
|
static inline int |
|
perf_event_query_prog_array(struct perf_event *event, void __user *info) |
|
{ |
|
return -EOPNOTSUPP; |
|
} |
|
static inline int bpf_probe_register(struct bpf_raw_event_map *btp, struct bpf_prog *p) |
|
{ |
|
return -EOPNOTSUPP; |
|
} |
|
static inline int bpf_probe_unregister(struct bpf_raw_event_map *btp, struct bpf_prog *p) |
|
{ |
|
return -EOPNOTSUPP; |
|
} |
|
static inline struct bpf_raw_event_map *bpf_get_raw_tracepoint(const char *name) |
|
{ |
|
return NULL; |
|
} |
|
static inline void bpf_put_raw_tracepoint(struct bpf_raw_event_map *btp) |
|
{ |
|
} |
|
static inline int bpf_get_perf_event_info(const struct perf_event *event, |
|
u32 *prog_id, u32 *fd_type, |
|
const char **buf, u64 *probe_offset, |
|
u64 *probe_addr) |
|
{ |
|
return -EOPNOTSUPP; |
|
} |
|
#endif |
|
|
|
enum { |
|
FILTER_OTHER = 0, |
|
FILTER_STATIC_STRING, |
|
FILTER_DYN_STRING, |
|
FILTER_PTR_STRING, |
|
FILTER_TRACE_FN, |
|
FILTER_COMM, |
|
FILTER_CPU, |
|
}; |
|
|
|
extern int trace_event_raw_init(struct trace_event_call *call); |
|
extern int trace_define_field(struct trace_event_call *call, const char *type, |
|
const char *name, int offset, int size, |
|
int is_signed, int filter_type); |
|
extern int trace_add_event_call(struct trace_event_call *call); |
|
extern int trace_remove_event_call(struct trace_event_call *call); |
|
extern int trace_event_get_offsets(struct trace_event_call *call); |
|
|
|
#define is_signed_type(type) (((type)(-1)) < (type)1) |
|
|
|
int ftrace_set_clr_event(struct trace_array *tr, char *buf, int set); |
|
int trace_set_clr_event(const char *system, const char *event, int set); |
|
int trace_array_set_clr_event(struct trace_array *tr, const char *system, |
|
const char *event, bool enable); |
|
/* |
|
* The double __builtin_constant_p is because gcc will give us an error |
|
* if we try to allocate the static variable to fmt if it is not a |
|
* constant. Even with the outer if statement optimizing out. |
|
*/ |
|
#define event_trace_printk(ip, fmt, args...) \ |
|
do { \ |
|
__trace_printk_check_format(fmt, ##args); \ |
|
tracing_record_cmdline(current); \ |
|
if (__builtin_constant_p(fmt)) { \ |
|
static const char *trace_printk_fmt \ |
|
__section("__trace_printk_fmt") = \ |
|
__builtin_constant_p(fmt) ? fmt : NULL; \ |
|
\ |
|
__trace_bprintk(ip, trace_printk_fmt, ##args); \ |
|
} else \ |
|
__trace_printk(ip, fmt, ##args); \ |
|
} while (0) |
|
|
|
#ifdef CONFIG_PERF_EVENTS |
|
struct perf_event; |
|
|
|
DECLARE_PER_CPU(struct pt_regs, perf_trace_regs); |
|
DECLARE_PER_CPU(int, bpf_kprobe_override); |
|
|
|
extern int perf_trace_init(struct perf_event *event); |
|
extern void perf_trace_destroy(struct perf_event *event); |
|
extern int perf_trace_add(struct perf_event *event, int flags); |
|
extern void perf_trace_del(struct perf_event *event, int flags); |
|
#ifdef CONFIG_KPROBE_EVENTS |
|
extern int perf_kprobe_init(struct perf_event *event, bool is_retprobe); |
|
extern void perf_kprobe_destroy(struct perf_event *event); |
|
extern int bpf_get_kprobe_info(const struct perf_event *event, |
|
u32 *fd_type, const char **symbol, |
|
u64 *probe_offset, u64 *probe_addr, |
|
bool perf_type_tracepoint); |
|
#endif |
|
#ifdef CONFIG_UPROBE_EVENTS |
|
extern int perf_uprobe_init(struct perf_event *event, |
|
unsigned long ref_ctr_offset, bool is_retprobe); |
|
extern void perf_uprobe_destroy(struct perf_event *event); |
|
extern int bpf_get_uprobe_info(const struct perf_event *event, |
|
u32 *fd_type, const char **filename, |
|
u64 *probe_offset, bool perf_type_tracepoint); |
|
#endif |
|
extern int ftrace_profile_set_filter(struct perf_event *event, int event_id, |
|
char *filter_str); |
|
extern void ftrace_profile_free_filter(struct perf_event *event); |
|
void perf_trace_buf_update(void *record, u16 type); |
|
void *perf_trace_buf_alloc(int size, struct pt_regs **regs, int *rctxp); |
|
|
|
void bpf_trace_run1(struct bpf_prog *prog, u64 arg1); |
|
void bpf_trace_run2(struct bpf_prog *prog, u64 arg1, u64 arg2); |
|
void bpf_trace_run3(struct bpf_prog *prog, u64 arg1, u64 arg2, |
|
u64 arg3); |
|
void bpf_trace_run4(struct bpf_prog *prog, u64 arg1, u64 arg2, |
|
u64 arg3, u64 arg4); |
|
void bpf_trace_run5(struct bpf_prog *prog, u64 arg1, u64 arg2, |
|
u64 arg3, u64 arg4, u64 arg5); |
|
void bpf_trace_run6(struct bpf_prog *prog, u64 arg1, u64 arg2, |
|
u64 arg3, u64 arg4, u64 arg5, u64 arg6); |
|
void bpf_trace_run7(struct bpf_prog *prog, u64 arg1, u64 arg2, |
|
u64 arg3, u64 arg4, u64 arg5, u64 arg6, u64 arg7); |
|
void bpf_trace_run8(struct bpf_prog *prog, u64 arg1, u64 arg2, |
|
u64 arg3, u64 arg4, u64 arg5, u64 arg6, u64 arg7, |
|
u64 arg8); |
|
void bpf_trace_run9(struct bpf_prog *prog, u64 arg1, u64 arg2, |
|
u64 arg3, u64 arg4, u64 arg5, u64 arg6, u64 arg7, |
|
u64 arg8, u64 arg9); |
|
void bpf_trace_run10(struct bpf_prog *prog, u64 arg1, u64 arg2, |
|
u64 arg3, u64 arg4, u64 arg5, u64 arg6, u64 arg7, |
|
u64 arg8, u64 arg9, u64 arg10); |
|
void bpf_trace_run11(struct bpf_prog *prog, u64 arg1, u64 arg2, |
|
u64 arg3, u64 arg4, u64 arg5, u64 arg6, u64 arg7, |
|
u64 arg8, u64 arg9, u64 arg10, u64 arg11); |
|
void bpf_trace_run12(struct bpf_prog *prog, u64 arg1, u64 arg2, |
|
u64 arg3, u64 arg4, u64 arg5, u64 arg6, u64 arg7, |
|
u64 arg8, u64 arg9, u64 arg10, u64 arg11, u64 arg12); |
|
void perf_trace_run_bpf_submit(void *raw_data, int size, int rctx, |
|
struct trace_event_call *call, u64 count, |
|
struct pt_regs *regs, struct hlist_head *head, |
|
struct task_struct *task); |
|
|
|
static inline void |
|
perf_trace_buf_submit(void *raw_data, int size, int rctx, u16 type, |
|
u64 count, struct pt_regs *regs, void *head, |
|
struct task_struct *task) |
|
{ |
|
perf_tp_event(type, count, raw_data, size, regs, head, rctx, task); |
|
} |
|
|
|
#endif |
|
|
|
#endif /* _LINUX_TRACE_EVENT_H */
|
|
|