tools/perf/util/thread.c

   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
  10 struct thread *thread__new(pid_t pid, pid_t tid)
  11 {
  12         struct thread *thread = zalloc(sizeof(*thread));
  13
  14         if (thread != NULL) {
  15                 map_groups__init(&thread->mg);
  16                 thread->pid_ = pid;
  17                 thread->tid = tid;
  18                 thread->ppid = -1;
  19                 thread->comm = malloc(32);
  20                 if (thread->comm)
  21                         snprintf(thread->comm, 32, ":%d", thread->tid);
  22         }
  23
  24         return thread;
  25 }
  26
  27 void thread__delete(struct thread *thread)
  28 {
  29         map_groups__exit(&thread->mg);
  30         free(thread->comm);
  31         free(thread);
  32 }
  33
  34 int thread__set_comm(struct thread *thread, const char *comm,
  35                      u64 timestamp __maybe_unused)
  36 {
  37         int err;
  38
  39         if (thread->comm)
  40                 free(thread->comm);
  41         thread->comm = strdup(comm);
  42         err = thread->comm == NULL ? -ENOMEM : 0;
  43         if (!err) {
  44                 thread->comm_set = true;
  45         }
  46         return err;
  47 }
  48
  49 const char *thread__comm_str(const struct thread *thread)
  50 {
  51         return thread->comm;
  52 }
  53
  54 int thread__comm_len(struct thread *thread)
  55 {
  56         if (!thread->comm_len) {
  57                 if (!thread->comm)
  58                         return 0;
  59                 thread->comm_len = strlen(thread->comm);
  60         }
  61
  62         return thread->comm_len;
  63 }
  64
  65 size_t thread__fprintf(struct thread *thread, FILE *fp)
  66 {
  67         return fprintf(fp, "Thread %d %s\n", thread->tid, thread__comm_str(thread)) +
  68                map_groups__fprintf(&thread->mg, verbose, fp);
  69 }
  70
  71 void thread__insert_map(struct thread *thread, struct map *map)
  72 {
  73         map_groups__fixup_overlappings(&thread->mg, map, verbose, stderr);
  74         map_groups__insert(&thread->mg, map);
  75 }
  76
  77 int thread__fork(struct thread *thread, struct thread *parent,
  78                  u64 timestamp __maybe_unused)
  79 {
  80         int i;
  81
  82         if (parent->comm_set) {
  83                 if (thread->comm)
  84                         free(thread->comm);
  85                 thread->comm = strdup(parent->comm);
  86                 if (!thread->comm)
  87                         return -ENOMEM;
  88                 thread->comm_set = true;
  89         }
  90
  91         for (i = 0; i < MAP__NR_TYPES; ++i)
  92                 if (map_groups__clone(&thread->mg, &parent->mg, i) < 0)
  93                         return -ENOMEM;
  94
  95         thread->ppid = parent->tid;
  96
  97         return 0;
  98 }