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