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 #include "comm.h"
  10
  11 struct thread *thread__new(pid_t pid, pid_t tid)
  12 {
  13         char *comm_str;
  14         struct comm *comm;
  15         struct thread *thread = zalloc(sizeof(*thread));
  16
  17         if (thread != NULL) {
  18                 map_groups__init(&thread->mg);
  19                 thread->pid_ = pid;
  20                 thread->tid = tid;
  21                 thread->ppid = -1;
  22                 INIT_LIST_HEAD(&thread->comm_list);
  23
  24                 comm_str = malloc(32);
  25                 if (!comm_str)
  26                         goto err_thread;
  27
  28                 snprintf(comm_str, 32, ":%d", tid);
  29                 comm = comm__new(comm_str, 0);
  30                 free(comm_str);
  31                 if (!comm)
  32                         goto err_thread;
  33
  34                 list_add(&comm->list, &thread->comm_list);
  35         }
  36
  37         return thread;
  38
  39 err_thread:
  40         free(thread);
  41         return NULL;
  42 }
  43
  44 void thread__delete(struct thread *thread)
  45 {
  46         struct comm *comm, *tmp;
  47
  48         map_groups__exit(&thread->mg);
  49         list_for_each_entry_safe(comm, tmp, &thread->comm_list, list) {
  50                 list_del(&comm->list);
  51                 comm__free(comm);
  52         }
  53
  54         free(thread);
  55 }
  56
  57 static struct comm *thread__comm(const struct thread *thread)
  58 {
  59         if (list_empty(&thread->comm_list))
  60                 return NULL;
  61
  62         return list_first_entry(&thread->comm_list, struct comm, list);
  63 }
  64
  65 /* CHECKME: time should always be 0 if event aren't ordered */
  66 int thread__set_comm(struct thread *thread, const char *str, u64 timestamp)
  67 {
  68         struct comm *new, *curr = thread__comm(thread);
  69
  70         /* Override latest entry if it had no specific time coverage */
  71         if (!curr->start) {
  72                 list_del(&curr->list);
  73                 comm__free(curr);
  74         }
  75
  76         new = comm__new(str, timestamp);
  77         if (!new)
  78                 return -ENOMEM;
  79
  80         list_add(&new->list, &thread->comm_list);
  81         thread->comm_set = true;
  82
  83         return 0;
  84 }
  85
  86 const char *thread__comm_str(const struct thread *thread)
  87 {
  88         const struct comm *comm = thread__comm(thread);
  89
  90         if (!comm)
  91                 return NULL;
  92
  93         return comm__str(comm);
  94 }
  95
  96 /* CHECKME: it should probably better return the max comm len from its comm list */
  97 int thread__comm_len(struct thread *thread)
  98 {
  99         if (!thread->comm_len) {
 100                 const char *comm = thread__comm_str(thread);
 101                 if (!comm)
 102                         return 0;
 103                 thread->comm_len = strlen(comm);
 104         }
 105
 106         return thread->comm_len;
 107 }
 108
 109 size_t thread__fprintf(struct thread *thread, FILE *fp)
 110 {
 111         return fprintf(fp, "Thread %d %s\n", thread->tid, thread__comm_str(thread)) +
 112                map_groups__fprintf(&thread->mg, verbose, fp);
 113 }
 114
 115 void thread__insert_map(struct thread *thread, struct map *map)
 116 {
 117         map_groups__fixup_overlappings(&thread->mg, map, verbose, stderr);
 118         map_groups__insert(&thread->mg, map);
 119 }
 120
 121 int thread__fork(struct thread *thread, struct thread *parent, u64 timestamp)
 122 {
 123         int i, err;
 124
 125         if (parent->comm_set) {
 126                 const char *comm = thread__comm_str(parent);
 127                 if (!comm)
 128                         return -ENOMEM;
 129                 err = thread__set_comm(thread, comm, timestamp);
 130                 if (!err)
 131                         return err;
 132                 thread->comm_set = true;
 133         }
 134
 135         for (i = 0; i < MAP__NR_TYPES; ++i)
 136                 if (map_groups__clone(&thread->mg, &parent->mg, i) < 0)
 137                         return -ENOMEM;
 138
 139         thread->ppid = parent->tid;
 140
 141         return 0;
 142 }