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 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         int err;
  70
  71         /* Override latest entry if it had no specific time coverage */
  72         if (!curr->start) {
  73                 err = comm__override(curr, str, timestamp);
  74                 if (err)
  75                         return err;
  76         } else {
  77                 new = comm__new(str, timestamp);
  78                 if (!new)
  79                         return -ENOMEM;
  80                 list_add(&new->list, &thread->comm_list);
  81         }
  82
  83         thread->comm_set = true;
  84
  85         return 0;
  86 }
  87
  88 const char *thread__comm_str(const struct thread *thread)
  89 {
  90         const struct comm *comm = thread__comm(thread);
  91
  92         if (!comm)
  93                 return NULL;
  94
  95         return comm__str(comm);
  96 }
  97
  98 /* CHECKME: it should probably better return the max comm len from its comm list */
  99 int thread__comm_len(struct thread *thread)
 100 {
 101         if (!thread->comm_len) {
 102                 const char *comm = thread__comm_str(thread);
 103                 if (!comm)
 104                         return 0;
 105                 thread->comm_len = strlen(comm);
 106         }
 107
 108         return thread->comm_len;
 109 }
 110
 111 size_t thread__fprintf(struct thread *thread, FILE *fp)
 112 {
 113         return fprintf(fp, "Thread %d %s\n", thread->tid, thread__comm_str(thread)) +
 114                map_groups__fprintf(&thread->mg, verbose, fp);
 115 }
 116
 117 void thread__insert_map(struct thread *thread, struct map *map)
 118 {
 119         map_groups__fixup_overlappings(&thread->mg, map, verbose, stderr);
 120         map_groups__insert(&thread->mg, map);
 121 }
 122
 123 int thread__fork(struct thread *thread, struct thread *parent, u64 timestamp)
 124 {
 125         int i, err;
 126
 127         if (parent->comm_set) {
 128                 const char *comm = thread__comm_str(parent);
 129                 if (!comm)
 130                         return -ENOMEM;
 131                 err = thread__set_comm(thread, comm, timestamp);
 132                 if (err)
 133                         return err;
 134                 thread->comm_set = true;
 135         }
 136
 137         for (i = 0; i < MAP__NR_TYPES; ++i)
 138                 if (map_groups__clone(&thread->mg, &parent->mg, i) < 0)
 139                         return -ENOMEM;
 140
 141         thread->ppid = parent->tid;
 142
 143         return 0;
 144 }
 145
 146 void thread__find_cpumode_addr_location(struct thread *thread,
 147                                         struct machine *machine,
 148                                         enum map_type type, u64 addr,
 149                                         struct addr_location *al)
 150 {
 151         size_t i;
 152         const u8 const cpumodes[] = {
 153                 PERF_RECORD_MISC_USER,
 154                 PERF_RECORD_MISC_KERNEL,
 155                 PERF_RECORD_MISC_GUEST_USER,
 156                 PERF_RECORD_MISC_GUEST_KERNEL
 157         };
 158
 159         for (i = 0; i < ARRAY_SIZE(cpumodes); i++) {
 160                 thread__find_addr_location(thread, machine, cpumodes[i], type,
 161                                            addr, al);
 162                 if (al->map)
 163                         break;
 164         }
 165 }