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
70 /* Override latest entry if it had no specific time coverage */
71 if (!curr->start) {
72 comm__override(curr, str, timestamp);
73 } else {
74 new = comm__new(str, timestamp);
75 if (!new)
76 return -ENOMEM;
77 list_add(&new->list, &thread->comm_list);
78 }
79
80 thread->comm_set = true;
81
82 return 0;
83}
84
85const char *thread__comm_str(const struct thread *thread)
86{
87 const struct comm *comm = thread__comm(thread);
88
89 if (!comm)
90 return NULL;
91
92 return comm__str(comm);
93}
94
95/* CHECKME: it should probably better return the max comm len from its comm list */
96int thread__comm_len(struct thread *thread)
97{
98 if (!thread->comm_len) {
99 const char *comm = thread__comm_str(thread);
100 if (!comm)
101 return 0;
102 thread->comm_len = strlen(comm);
103 }
104
105 return thread->comm_len;
106}
107
108size_t thread__fprintf(struct thread *thread, FILE *fp)
109{
110 return fprintf(fp, "Thread %d %s\n", thread->tid, thread__comm_str(thread)) +
111 map_groups__fprintf(&thread->mg, verbose, fp);
112}
113
114void thread__insert_map(struct thread *thread, struct map *map)
115{
116 map_groups__fixup_overlappings(&thread->mg, map, verbose, stderr);
117 map_groups__insert(&thread->mg, map);
118}
119
120int thread__fork(struct thread *thread, struct thread *parent, u64 timestamp)
121{
122 int i, err;
123
124 if (parent->comm_set) {
125 const char *comm = thread__comm_str(parent);
126 if (!comm)
127 return -ENOMEM;
128 err = thread__set_comm(thread, comm, timestamp);
129 if (!err)
130 return err;
131 thread->comm_set = true;
132 }
133
134 for (i = 0; i < MAP__NR_TYPES; ++i)
135 if (map_groups__clone(&thread->mg, &parent->mg, i) < 0)
136 return -ENOMEM;
137
138 thread->ppid = parent->tid;
139
140 return 0;
141}