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
  14 struct thread;
  15 struct comm;
  16 struct ip_callchain;
  17 struct symbol;
  18 struct dso;
  19 struct comm;
  20 struct perf_sample;
  21 struct addr_location;
  22 struct 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  */
  32 enum {
  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  */
  54 struct 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  */
  77 struct 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
  83 int thread_stack__event(struct thread *thread, int cpu, u32 flags, u64 from_ip,
  84                         u64 to_ip, u16 insn_len, u64 trace_nr, bool callstack,
  85                         unsigned int br_stack_sz, bool mispred_all);
  86 void thread_stack__set_trace_nr(struct thread *thread, int cpu, u64 trace_nr);
  87 void thread_stack__sample(struct thread *thread, int cpu, struct ip_callchain *chain,
  88                           size_t sz, u64 ip, u64 kernel_start);
  89 void thread_stack__sample_late(struct thread *thread, int cpu,
  90                                struct ip_callchain *chain, size_t sz, u64 ip,
  91                                u64 kernel_start);
  92 void thread_stack__br_sample(struct thread *thread, int cpu,
  93                              struct branch_stack *dst, unsigned int sz);
  94 void thread_stack__br_sample_late(struct thread *thread, int cpu,
  95                                   struct branch_stack *dst, unsigned int sz,
  96                                   u64 sample_ip, u64 kernel_start);
  97 int thread_stack__flush(struct thread *thread);
  98 void thread_stack__free(struct thread *thread);
  99 size_t thread_stack__depth(struct thread *thread, int cpu);
 100
 101 struct call_return_processor *
 102 call_return_processor__new(int (*process)(struct call_return *cr, u64 *parent_db_id, void *data),
 103                            void *data);
 104 void call_return_processor__free(struct call_return_processor *crp);
 105 int thread_stack__process(struct thread *thread, struct comm *comm,
 106                           struct perf_sample *sample,
 107                           struct addr_location *from_al,
 108                           struct addr_location *to_al, u64 ref,
 109                           struct call_return_processor *crp);
 110
 111 #endif