7 #include "thread-stack.h"
13 int thread__init_map_groups(struct thread *thread, struct machine *machine)
15 struct thread *leader;
16 pid_t pid = thread->pid_;
18 if (pid == thread->tid || pid == -1) {
19 thread->mg = map_groups__new(machine);
21 leader = __machine__findnew_thread(machine, pid, pid);
23 thread->mg = map_groups__get(leader->mg);
26 return thread->mg ? 0 : -1;
29 struct thread *thread__new(pid_t pid, pid_t tid)
33 struct thread *thread = zalloc(sizeof(*thread));
40 INIT_LIST_HEAD(&thread->comm_list);
42 if (unwind__prepare_access(thread) < 0)
45 comm_str = malloc(32);
49 snprintf(comm_str, 32, ":%d", tid);
50 comm = comm__new(comm_str, 0, false);
55 list_add(&comm->list, &thread->comm_list);
56 atomic_set(&thread->refcnt, 0);
57 RB_CLEAR_NODE(&thread->rb_node);
67 void thread__delete(struct thread *thread)
69 struct comm *comm, *tmp;
71 BUG_ON(!RB_EMPTY_NODE(&thread->rb_node));
73 thread_stack__free(thread);
76 map_groups__put(thread->mg);
79 list_for_each_entry_safe(comm, tmp, &thread->comm_list, list) {
80 list_del(&comm->list);
83 unwind__finish_access(thread);
88 struct thread *thread__get(struct thread *thread)
91 atomic_inc(&thread->refcnt);
95 void thread__put(struct thread *thread)
97 if (thread && atomic_dec_and_test(&thread->refcnt)) {
98 list_del_init(&thread->node);
99 thread__delete(thread);
103 struct comm *thread__comm(const struct thread *thread)
105 if (list_empty(&thread->comm_list))
108 return list_first_entry(&thread->comm_list, struct comm, list);
111 struct comm *thread__exec_comm(const struct thread *thread)
113 struct comm *comm, *last = NULL, *second_last = NULL;
115 list_for_each_entry(comm, &thread->comm_list, list) {
123 * 'last' with no start time might be the parent's comm of a synthesized
124 * thread (created by processing a synthesized fork event). For a main
125 * thread, that is very probably wrong. Prefer a later comm to avoid
128 if (second_last && !last->start && thread->pid_ == thread->tid)
134 int __thread__set_comm(struct thread *thread, const char *str, u64 timestamp,
137 struct comm *new, *curr = thread__comm(thread);
140 /* Override the default :tid entry */
141 if (!thread->comm_set) {
142 err = comm__override(curr, str, timestamp, exec);
146 new = comm__new(str, timestamp, exec);
149 list_add(&new->list, &thread->comm_list);
152 unwind__flush_access(thread);
155 thread->comm_set = true;
160 const char *thread__comm_str(const struct thread *thread)
162 const struct comm *comm = thread__comm(thread);
167 return comm__str(comm);
170 /* CHECKME: it should probably better return the max comm len from its comm list */
171 int thread__comm_len(struct thread *thread)
173 if (!thread->comm_len) {
174 const char *comm = thread__comm_str(thread);
177 thread->comm_len = strlen(comm);
180 return thread->comm_len;
183 size_t thread__fprintf(struct thread *thread, FILE *fp)
185 return fprintf(fp, "Thread %d %s\n", thread->tid, thread__comm_str(thread)) +
186 map_groups__fprintf(thread->mg, fp);
189 void thread__insert_map(struct thread *thread, struct map *map)
191 map_groups__fixup_overlappings(thread->mg, map, stderr);
192 map_groups__insert(thread->mg, map);
195 static int thread__clone_map_groups(struct thread *thread,
196 struct thread *parent)
200 /* This is new thread, we share map groups for process. */
201 if (thread->pid_ == parent->pid_)
204 if (thread->mg == parent->mg) {
205 pr_debug("broken map groups on thread %d/%d parent %d/%d\n",
206 thread->pid_, thread->tid, parent->pid_, parent->tid);
210 /* But this one is new process, copy maps. */
211 for (i = 0; i < MAP__NR_TYPES; ++i)
212 if (map_groups__clone(thread->mg, parent->mg, i) < 0)
218 int thread__fork(struct thread *thread, struct thread *parent, u64 timestamp)
222 if (parent->comm_set) {
223 const char *comm = thread__comm_str(parent);
226 err = thread__set_comm(thread, comm, timestamp);
231 thread->ppid = parent->tid;
232 return thread__clone_map_groups(thread, parent);
235 void thread__find_cpumode_addr_location(struct thread *thread,
236 enum map_type type, u64 addr,
237 struct addr_location *al)
240 const u8 cpumodes[] = {
241 PERF_RECORD_MISC_USER,
242 PERF_RECORD_MISC_KERNEL,
243 PERF_RECORD_MISC_GUEST_USER,
244 PERF_RECORD_MISC_GUEST_KERNEL
247 for (i = 0; i < ARRAY_SIZE(cpumodes); i++) {
248 thread__find_addr_location(thread, cpumodes[i], type, addr, al);