Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1#include "../perf.h"
2#include <stdlib.h>
3#include <stdio.h>
4#include <string.h>
5#include "session.h"
6#include "thread.h"
7#include "util.h"
8#include "debug.h"
9#include "comm.h"
10
11struct thread *thread__new(pid_t pid, pid_t tid)
12{
13 char *comm_str;
14 struct comm *comm;
15 struct thread *thread = zalloc(sizeof(*thread));
16
17 if (thread != NULL) {
18 map_groups__init(&thread->mg);
19 thread->pid_ = pid;
20 thread->tid = tid;
21 thread->ppid = -1;
22 INIT_LIST_HEAD(&thread->comm_list);
23
24 comm_str = malloc(32);
25 if (!comm_str)
26 goto err_thread;
27
28 snprintf(comm_str, 32, ":%d", tid);
29 comm = comm__new(comm_str, 0);
30 free(comm_str);
31 if (!comm)
32 goto err_thread;
33
34 list_add(&comm->list, &thread->comm_list);
35 }
36
37 return thread;
38
39err_thread:
40 free(thread);
41 return NULL;
42}
43
44void thread__delete(struct thread *thread)
45{
46 struct comm *comm, *tmp;
47
48 map_groups__exit(&thread->mg);
49 list_for_each_entry_safe(comm, tmp, &thread->comm_list, list) {
50 list_del(&comm->list);
51 comm__free(comm);
52 }
53
54 free(thread);
55}
56
57struct comm *thread__comm(const struct thread *thread)
58{
59 if (list_empty(&thread->comm_list))
60 return NULL;
61
62 return list_first_entry(&thread->comm_list, struct comm, list);
63}
64
65/* CHECKME: time should always be 0 if event aren't ordered */
66int thread__set_comm(struct thread *thread, const char *str, u64 timestamp)
67{
68 struct comm *new, *curr = thread__comm(thread);
69 int err;
70
71 /* Override latest entry if it had no specific time coverage */
72 if (!curr->start) {
73 err = comm__override(curr, str, timestamp);
74 if (err)
75 return err;
76 } else {
77 new = comm__new(str, timestamp);
78 if (!new)
79 return -ENOMEM;
80 list_add(&new->list, &thread->comm_list);
81 }
82
83 thread->comm_set = true;
84
85 return 0;
86}
87
88const char *thread__comm_str(const struct thread *thread)
89{
90 const struct comm *comm = thread__comm(thread);
91
92 if (!comm)
93 return NULL;
94
95 return comm__str(comm);
96}
97
98/* CHECKME: it should probably better return the max comm len from its comm list */
99int thread__comm_len(struct thread *thread)
100{
101 if (!thread->comm_len) {
102 const char *comm = thread__comm_str(thread);
103 if (!comm)
104 return 0;
105 thread->comm_len = strlen(comm);
106 }
107
108 return thread->comm_len;
109}
110
111size_t thread__fprintf(struct thread *thread, FILE *fp)
112{
113 return fprintf(fp, "Thread %d %s\n", thread->tid, thread__comm_str(thread)) +
114 map_groups__fprintf(&thread->mg, verbose, fp);
115}
116
117void thread__insert_map(struct thread *thread, struct map *map)
118{
119 map_groups__fixup_overlappings(&thread->mg, map, verbose, stderr);
120 map_groups__insert(&thread->mg, map);
121}
122
123int thread__fork(struct thread *thread, struct thread *parent, u64 timestamp)
124{
125 int i, err;
126
127 if (parent->comm_set) {
128 const char *comm = thread__comm_str(parent);
129 if (!comm)
130 return -ENOMEM;
131 err = thread__set_comm(thread, comm, timestamp);
132 if (err)
133 return err;
134 thread->comm_set = true;
135 }
136
137 for (i = 0; i < MAP__NR_TYPES; ++i)
138 if (map_groups__clone(&thread->mg, &parent->mg, i) < 0)
139 return -ENOMEM;
140
141 thread->ppid = parent->tid;
142
143 return 0;
144}
145
146void thread__find_cpumode_addr_location(struct thread *thread,
147 struct machine *machine,
148 enum map_type type, u64 addr,
149 struct addr_location *al)
150{
151 size_t i;
152 const u8 const cpumodes[] = {
153 PERF_RECORD_MISC_USER,
154 PERF_RECORD_MISC_KERNEL,
155 PERF_RECORD_MISC_GUEST_USER,
156 PERF_RECORD_MISC_GUEST_KERNEL
157 };
158
159 for (i = 0; i < ARRAY_SIZE(cpumodes); i++) {
160 thread__find_addr_location(thread, machine, cpumodes[i], type,
161 addr, al);
162 if (al->map)
163 break;
164 }
165}