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 } 166