1 /* 2 * thread-stack.h: Synthesize a thread's stack using call / return events 3 * Copyright (c) 2014, Intel Corporation. 4 * 5 * This program is free software; you can redistribute it and/or modify it 6 * under the terms and conditions of the GNU General Public License, 7 * version 2, as published by the Free Software Foundation. 8 * 9 * This program is distributed in the hope it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 12 * more details. 13 * 14 */ 15 16 #ifndef __PERF_THREAD_STACK_H 17 #define __PERF_THREAD_STACK_H 18 19 #include <sys/types.h> 20 21 #include <linux/types.h> 22 23 struct thread; 24 struct comm; 25 struct ip_callchain; 26 struct symbol; 27 struct dso; 28 struct comm; 29 struct perf_sample; 30 struct addr_location; 31 struct call_path; 32 33 /* 34 * Call/Return flags. 35 * 36 * CALL_RETURN_NO_CALL: 'return' but no matching 'call' 37 * CALL_RETURN_NO_RETURN: 'call' but no matching 'return' 38 */ 39 enum { 40 CALL_RETURN_NO_CALL = 1 << 0, 41 CALL_RETURN_NO_RETURN = 1 << 1, 42 }; 43 44 /** 45 * struct call_return - paired call/return information. 46 * @thread: thread in which call/return occurred 47 * @comm: comm in which call/return occurred 48 * @cp: call path 49 * @call_time: timestamp of call (if known) 50 * @return_time: timestamp of return (if known) 51 * @branch_count: number of branches seen between call and return 52 * @call_ref: external reference to 'call' sample (e.g. db_id) 53 * @return_ref: external reference to 'return' sample (e.g. db_id) 54 * @db_id: id used for db-export 55 * @flags: Call/Return flags 56 */ 57 struct call_return { 58 struct thread *thread; 59 struct comm *comm; 60 struct call_path *cp; 61 u64 call_time; 62 u64 return_time; 63 u64 branch_count; 64 u64 call_ref; 65 u64 return_ref; 66 u64 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, void *data); 80 void *data; 81 }; 82 83 int thread_stack__event(struct thread *thread, u32 flags, u64 from_ip, 84 u64 to_ip, u16 insn_len, u64 trace_nr); 85 void thread_stack__set_trace_nr(struct thread *thread, u64 trace_nr); 86 void thread_stack__sample(struct thread *thread, struct ip_callchain *chain, 87 size_t sz, u64 ip, u64 kernel_start); 88 int thread_stack__flush(struct thread *thread); 89 void thread_stack__free(struct thread *thread); 90 size_t thread_stack__depth(struct thread *thread); 91 92 struct call_return_processor * 93 call_return_processor__new(int (*process)(struct call_return *cr, void *data), 94 void *data); 95 void call_return_processor__free(struct call_return_processor *crp); 96 int 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