#include "../perf.h" #include #include #include #include "session.h" #include "thread.h" #include "thread-stack.h" #include "util.h" #include "debug.h" #include "comm.h" #include "unwind.h" int thread__init_map_groups(struct thread *thread, struct machine *machine) { struct thread *leader; pid_t pid = thread->pid_; if (pid == thread->tid || pid == -1) { thread->mg = map_groups__new(machine); } else { leader = machine__findnew_thread(machine, pid, pid); if (leader) thread->mg = map_groups__get(leader->mg); } return thread->mg ? 0 : -1; } struct thread *thread__new(pid_t pid, pid_t tid) { char *comm_str; struct comm *comm; struct thread *thread = zalloc(sizeof(*thread)); if (thread != NULL) { thread->pid_ = pid; thread->tid = tid; thread->ppid = -1; thread->cpu = -1; INIT_LIST_HEAD(&thread->comm_list); if (unwind__prepare_access(thread) < 0) goto err_thread; comm_str = malloc(32); if (!comm_str) goto err_thread; snprintf(comm_str, 32, ":%d", tid); comm = comm__new(comm_str, 0, false); free(comm_str); if (!comm) goto err_thread; list_add(&comm->list, &thread->comm_list); } return thread; err_thread: free(thread); return NULL; } void thread__delete(struct thread *thread) { struct comm *comm, *tmp; thread_stack__free(thread); if (thread->mg) { map_groups__put(thread->mg); thread->mg = NULL; } list_for_each_entry_safe(comm, tmp, &thread->comm_list, list) { list_del(&comm->list); comm__free(comm); } unwind__finish_access(thread); free(thread); } struct comm *thread__comm(const struct thread *thread) { if (list_empty(&thread->comm_list)) return NULL; return list_first_entry(&thread->comm_list, struct comm, list); } struct comm *thread__exec_comm(const struct thread *thread) { struct comm *comm, *last = NULL; list_for_each_entry(comm, &thread->comm_list, list) { if (comm->exec) return comm; last = comm; } return last; } int __thread__set_comm(struct thread *thread, const char *str, u64 timestamp, bool exec) { struct comm *new, *curr = thread__comm(thread); int err; /* Override the default :tid entry */ if (!thread->comm_set) { err = comm__override(curr, str, timestamp, exec); if (err) return err; } else { new = comm__new(str, timestamp, exec); if (!new) return -ENOMEM; list_add(&new->list, &thread->comm_list); if (exec) unwind__flush_access(thread); } thread->comm_set = true; return 0; } const char *thread__comm_str(const struct thread *thread) { const struct comm *comm = thread__comm(thread); if (!comm) return NULL; return comm__str(comm); } /* CHECKME: it should probably better return the max comm len from its comm list */ int thread__comm_len(struct thread *thread) { if (!thread->comm_len) { const char *comm = thread__comm_str(thread); if (!comm) return 0; thread->comm_len = strlen(comm); } return thread->comm_len; } size_t thread__fprintf(struct thread *thread, FILE *fp) { return fprintf(fp, "Thread %d %s\n", thread->tid, thread__comm_str(thread)) + map_groups__fprintf(thread->mg, fp); } void thread__insert_map(struct thread *thread, struct map *map) { map_groups__fixup_overlappings(thread->mg, map, stderr); map_groups__insert(thread->mg, map); } static int thread__clone_map_groups(struct thread *thread, struct thread *parent) { int i; /* This is new thread, we share map groups for process. */ if (thread->pid_ == parent->pid_) return 0; /* But this one is new process, copy maps. */ for (i = 0; i < MAP__NR_TYPES; ++i) if (map_groups__clone(thread->mg, parent->mg, i) < 0) return -ENOMEM; return 0; } int thread__fork(struct thread *thread, struct thread *parent, u64 timestamp) { int err; if (parent->comm_set) { const char *comm = thread__comm_str(parent); if (!comm) return -ENOMEM; err = thread__set_comm(thread, comm, timestamp); if (err) return err; thread->comm_set = true; } thread->ppid = parent->tid; return thread__clone_map_groups(thread, parent); } void thread__find_cpumode_addr_location(struct thread *thread, enum map_type type, u64 addr, struct addr_location *al) { size_t i; const u8 const cpumodes[] = { PERF_RECORD_MISC_USER, PERF_RECORD_MISC_KERNEL, PERF_RECORD_MISC_GUEST_USER, PERF_RECORD_MISC_GUEST_KERNEL }; for (i = 0; i < ARRAY_SIZE(cpumodes); i++) { thread__find_addr_location(thread, cpumodes[i], type, addr, al); if (al->map) break; } }