LXR linux/tools/perf/util/thread-stack.h

   1/* SPDX-License-Identifier: GPL-2.0-only */
   2/*
   3 * thread-stack.h: Synthesize a thread's stack using call / return events
   4 * Copyright (c) 2014, Intel Corporation.
   5 */
   6
   7#ifndef __PERF_THREAD_STACK_H
   8#define __PERF_THREAD_STACK_H
   9
  10#include <sys/types.h>
  11
  12#include <linux/types.h>
  13
  14struct thread;
  15struct comm;
  16struct ip_callchain;
  17struct symbol;
  18struct dso;
  19struct comm;
  20struct perf_sample;
  21struct addr_location;
  22struct call_path;
  23
  24/*
  25 * Call/Return flags.
  26 *
  27 * CALL_RETURN_NO_CALL: 'return' but no matching 'call'
  28 * CALL_RETURN_NO_RETURN: 'call' but no matching 'return'
  29 * CALL_RETURN_NON_CALL: a branch but not a 'call' to the start of a different
  30 *                       symbol
  31 */
  32enum {
  33        CALL_RETURN_NO_CALL     = 1 << 0,
  34        CALL_RETURN_NO_RETURN   = 1 << 1,
  35        CALL_RETURN_NON_CALL    = 1 << 2,
  36};
  37
  38/**
  39 * struct call_return - paired call/return information.
  40 * @thread: thread in which call/return occurred
  41 * @comm: comm in which call/return occurred
  42 * @cp: call path
  43 * @call_time: timestamp of call (if known)
  44 * @return_time: timestamp of return (if known)
  45 * @branch_count: number of branches seen between call and return
  46 * @insn_count: approx. number of instructions between call and return
  47 * @cyc_count: approx. number of cycles between call and return
  48 * @call_ref: external reference to 'call' sample (e.g. db_id)
  49 * @return_ref:  external reference to 'return' sample (e.g. db_id)
  50 * @db_id: id used for db-export
  51 * @parent_db_id: id of parent call used for db-export
  52 * @flags: Call/Return flags
  53 */
  54struct call_return {
  55        struct thread *thread;
  56        struct comm *comm;
  57        struct call_path *cp;
  58        u64 call_time;
  59        u64 return_time;
  60        u64 branch_count;
  61        u64 insn_count;
  62        u64 cyc_count;
  63        u64 call_ref;
  64        u64 return_ref;
  65        u64 db_id;
  66        u64 parent_db_id;
  67        u32 flags;
  68};
  69
  70/**
  71 * struct call_return_processor - provides a call-back to consume call-return
  72 *                                information.
  73 * @cpr: call path root
  74 * @process: call-back that accepts call/return information
  75 * @data: anonymous data for call-back
  76 */
  77struct call_return_processor {
  78        struct call_path_root *cpr;
  79        int (*process)(struct call_return *cr, u64 *parent_db_id, void *data);
  80        void *data;
  81};
  82
  83int thread_stack__event(struct thread *thread, int cpu, u32 flags, u64 from_ip,
  84                        u64 to_ip, u16 insn_len, u64 trace_nr);
  85void thread_stack__set_trace_nr(struct thread *thread, int cpu, u64 trace_nr);
  86void thread_stack__sample(struct thread *thread, int cpu, struct ip_callchain *chain,
  87                          size_t sz, u64 ip, u64 kernel_start);
  88int thread_stack__flush(struct thread *thread);
  89void thread_stack__free(struct thread *thread);
  90size_t thread_stack__depth(struct thread *thread, int cpu);
  91
  92struct call_return_processor *
  93call_return_processor__new(int (*process)(struct call_return *cr, u64 *parent_db_id, void *data),
  94                           void *data);
  95void call_return_processor__free(struct call_return_processor *crp);
  96int thread_stack__process(struct thread *thread, struct comm *comm,
  97                          struct perf_sample *sample,
  98                          struct addr_location *from_al,
  99                          struct addr_location *to_al, u64 ref,
 100                          struct call_return_processor *crp);
 101
 102#endif
 103