7 #include "thread-stack.h"
13 #include <api/fs/fs.h>
15 int thread__init_map_groups(struct thread *thread, struct machine *machine)
17 struct thread *leader;
18 pid_t pid = thread->pid_;
20 if (pid == thread->tid || pid == -1) {
21 thread->mg = map_groups__new(machine);
23 leader = __machine__findnew_thread(machine, pid, pid);
25 thread->mg = map_groups__get(leader->mg);
30 return thread->mg ? 0 : -1;
33 struct thread *thread__new(pid_t pid, pid_t tid)
37 struct thread *thread = zalloc(sizeof(*thread));
44 INIT_LIST_HEAD(&thread->comm_list);
46 if (unwind__prepare_access(thread) < 0)
49 comm_str = malloc(32);
53 snprintf(comm_str, 32, ":%d", tid);
54 comm = comm__new(comm_str, 0, false);
59 list_add(&comm->list, &thread->comm_list);
60 atomic_set(&thread->refcnt, 1);
61 RB_CLEAR_NODE(&thread->rb_node);
71 void thread__delete(struct thread *thread)
73 struct comm *comm, *tmp;
75 BUG_ON(!RB_EMPTY_NODE(&thread->rb_node));
77 thread_stack__free(thread);
80 map_groups__put(thread->mg);
83 list_for_each_entry_safe(comm, tmp, &thread->comm_list, list) {
84 list_del(&comm->list);
87 unwind__finish_access(thread);
92 struct thread *thread__get(struct thread *thread)
95 atomic_inc(&thread->refcnt);
99 void thread__put(struct thread *thread)
101 if (thread && atomic_dec_and_test(&thread->refcnt)) {
103 * Remove it from the dead_threads list, as last reference
106 list_del_init(&thread->node);
107 thread__delete(thread);
111 struct comm *thread__comm(const struct thread *thread)
113 if (list_empty(&thread->comm_list))
116 return list_first_entry(&thread->comm_list, struct comm, list);
119 struct comm *thread__exec_comm(const struct thread *thread)
121 struct comm *comm, *last = NULL;
123 list_for_each_entry(comm, &thread->comm_list, list) {
132 int __thread__set_comm(struct thread *thread, const char *str, u64 timestamp,
135 struct comm *new, *curr = thread__comm(thread);
138 /* Override the default :tid entry */
139 if (!thread->comm_set) {
140 err = comm__override(curr, str, timestamp, exec);
144 new = comm__new(str, timestamp, exec);
147 list_add(&new->list, &thread->comm_list);
150 unwind__flush_access(thread);
153 thread->comm_set = true;
158 int thread__set_comm_from_proc(struct thread *thread)
165 if (!(snprintf(path, sizeof(path), "%d/task/%d/comm",
166 thread->pid_, thread->tid) >= (int)sizeof(path)) &&
167 procfs__read_str(path, &comm, &sz) == 0) {
169 err = thread__set_comm(thread, comm, 0);
175 const char *thread__comm_str(const struct thread *thread)
177 const struct comm *comm = thread__comm(thread);
182 return comm__str(comm);
185 /* CHECKME: it should probably better return the max comm len from its comm list */
186 int thread__comm_len(struct thread *thread)
188 if (!thread->comm_len) {
189 const char *comm = thread__comm_str(thread);
192 thread->comm_len = strlen(comm);
195 return thread->comm_len;
198 size_t thread__fprintf(struct thread *thread, FILE *fp)
200 return fprintf(fp, "Thread %d %s\n", thread->tid, thread__comm_str(thread)) +
201 map_groups__fprintf(thread->mg, fp);
204 void thread__insert_map(struct thread *thread, struct map *map)
206 map_groups__fixup_overlappings(thread->mg, map, stderr);
207 map_groups__insert(thread->mg, map);
210 static int thread__clone_map_groups(struct thread *thread,
211 struct thread *parent)
215 /* This is new thread, we share map groups for process. */
216 if (thread->pid_ == parent->pid_)
219 if (thread->mg == parent->mg) {
220 pr_debug("broken map groups on thread %d/%d parent %d/%d\n",
221 thread->pid_, thread->tid, parent->pid_, parent->tid);
225 /* But this one is new process, copy maps. */
226 for (i = 0; i < MAP__NR_TYPES; ++i)
227 if (map_groups__clone(thread->mg, parent->mg, i) < 0)
233 int thread__fork(struct thread *thread, struct thread *parent, u64 timestamp)
237 if (parent->comm_set) {
238 const char *comm = thread__comm_str(parent);
241 err = thread__set_comm(thread, comm, timestamp);
246 thread->ppid = parent->tid;
247 return thread__clone_map_groups(thread, parent);
250 void thread__find_cpumode_addr_location(struct thread *thread,
251 enum map_type type, u64 addr,
252 struct addr_location *al)
255 const u8 cpumodes[] = {
256 PERF_RECORD_MISC_USER,
257 PERF_RECORD_MISC_KERNEL,
258 PERF_RECORD_MISC_GUEST_USER,
259 PERF_RECORD_MISC_GUEST_KERNEL
262 for (i = 0; i < ARRAY_SIZE(cpumodes); i++) {
263 thread__find_addr_location(thread, cpumodes[i], type, addr, al);