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);
28 return thread->mg ? 0 : -1;
31 struct thread *thread__new(pid_t pid, pid_t tid)
35 struct thread *thread = zalloc(sizeof(*thread));
42 INIT_LIST_HEAD(&thread->comm_list);
44 if (unwind__prepare_access(thread) < 0)
47 comm_str = malloc(32);
51 snprintf(comm_str, 32, ":%d", tid);
52 comm = comm__new(comm_str, 0, false);
57 list_add(&comm->list, &thread->comm_list);
58 atomic_set(&thread->refcnt, 1);
59 RB_CLEAR_NODE(&thread->rb_node);
69 void thread__delete(struct thread *thread)
71 struct comm *comm, *tmp;
73 BUG_ON(!RB_EMPTY_NODE(&thread->rb_node));
75 thread_stack__free(thread);
78 map_groups__put(thread->mg);
81 list_for_each_entry_safe(comm, tmp, &thread->comm_list, list) {
82 list_del(&comm->list);
85 unwind__finish_access(thread);
90 struct thread *thread__get(struct thread *thread)
93 atomic_inc(&thread->refcnt);
97 void thread__put(struct thread *thread)
99 if (thread && atomic_dec_and_test(&thread->refcnt)) {
101 * Remove it from the dead_threads list, as last reference
104 list_del_init(&thread->node);
105 thread__delete(thread);
109 struct comm *thread__comm(const struct thread *thread)
111 if (list_empty(&thread->comm_list))
114 return list_first_entry(&thread->comm_list, struct comm, list);
117 struct comm *thread__exec_comm(const struct thread *thread)
119 struct comm *comm, *last = NULL;
121 list_for_each_entry(comm, &thread->comm_list, list) {
130 int __thread__set_comm(struct thread *thread, const char *str, u64 timestamp,
133 struct comm *new, *curr = thread__comm(thread);
136 /* Override the default :tid entry */
137 if (!thread->comm_set) {
138 err = comm__override(curr, str, timestamp, exec);
142 new = comm__new(str, timestamp, exec);
145 list_add(&new->list, &thread->comm_list);
148 unwind__flush_access(thread);
151 thread->comm_set = true;
156 const char *thread__comm_str(const struct thread *thread)
158 const struct comm *comm = thread__comm(thread);
163 return comm__str(comm);
166 /* CHECKME: it should probably better return the max comm len from its comm list */
167 int thread__comm_len(struct thread *thread)
169 if (!thread->comm_len) {
170 const char *comm = thread__comm_str(thread);
173 thread->comm_len = strlen(comm);
176 return thread->comm_len;
179 size_t thread__fprintf(struct thread *thread, FILE *fp)
181 return fprintf(fp, "Thread %d %s\n", thread->tid, thread__comm_str(thread)) +
182 map_groups__fprintf(thread->mg, fp);
185 void thread__insert_map(struct thread *thread, struct map *map)
187 map_groups__fixup_overlappings(thread->mg, map, stderr);
188 map_groups__insert(thread->mg, map);
191 static int thread__clone_map_groups(struct thread *thread,
192 struct thread *parent)
196 /* This is new thread, we share map groups for process. */
197 if (thread->pid_ == parent->pid_)
200 if (thread->mg == parent->mg) {
201 pr_debug("broken map groups on thread %d/%d parent %d/%d\n",
202 thread->pid_, thread->tid, parent->pid_, parent->tid);
206 /* But this one is new process, copy maps. */
207 for (i = 0; i < MAP__NR_TYPES; ++i)
208 if (map_groups__clone(thread->mg, parent->mg, i) < 0)
214 int thread__fork(struct thread *thread, struct thread *parent, u64 timestamp)
218 if (parent->comm_set) {
219 const char *comm = thread__comm_str(parent);
222 err = thread__set_comm(thread, comm, timestamp);
227 thread->ppid = parent->tid;
228 return thread__clone_map_groups(thread, parent);
231 void thread__find_cpumode_addr_location(struct thread *thread,
232 enum map_type type, u64 addr,
233 struct addr_location *al)
236 const u8 const cpumodes[] = {
237 PERF_RECORD_MISC_USER,
238 PERF_RECORD_MISC_KERNEL,
239 PERF_RECORD_MISC_GUEST_USER,
240 PERF_RECORD_MISC_GUEST_KERNEL
243 for (i = 0; i < ARRAY_SIZE(cpumodes); i++) {
244 thread__find_addr_location(thread, cpumodes[i], type, addr, al);