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 "thread-stack.h" 8 #include "util.h" 9 #include "debug.h" 10 #include "comm.h" 11 #include "unwind.h" 12 13 int thread__init_map_groups(struct thread *thread, struct machine *machine) 14 { 15 struct thread *leader; 16 pid_t pid = thread->pid_; 17 18 if (pid == thread->tid || pid == -1) { 19 thread->mg = map_groups__new(machine); 20 } else { 21 leader = machine__findnew_thread(machine, pid, pid); 22 if (leader) 23 thread->mg = map_groups__get(leader->mg); 24 } 25 26 return thread->mg ? 0 : -1; 27 } 28 29 struct thread *thread__new(pid_t pid, pid_t tid) 30 { 31 char *comm_str; 32 struct comm *comm; 33 struct thread *thread = zalloc(sizeof(*thread)); 34 35 if (thread != NULL) { 36 thread->pid_ = pid; 37 thread->tid = tid; 38 thread->ppid = -1; 39 thread->cpu = -1; 40 INIT_LIST_HEAD(&thread->comm_list); 41 42 if (unwind__prepare_access(thread) < 0) 43 goto err_thread; 44 45 comm_str = malloc(32); 46 if (!comm_str) 47 goto err_thread; 48 49 snprintf(comm_str, 32, ":%d", tid); 50 comm = comm__new(comm_str, 0, false); 51 free(comm_str); 52 if (!comm) 53 goto err_thread; 54 55 list_add(&comm->list, &thread->comm_list); 56 57 } 58 59 return thread; 60 61 err_thread: 62 free(thread); 63 return NULL; 64 } 65 66 void thread__delete(struct thread *thread) 67 { 68 struct comm *comm, *tmp; 69 70 thread_stack__free(thread); 71 72 if (thread->mg) { 73 map_groups__put(thread->mg); 74 thread->mg = NULL; 75 } 76 list_for_each_entry_safe(comm, tmp, &thread->comm_list, list) { 77 list_del(&comm->list); 78 comm__free(comm); 79 } 80 unwind__finish_access(thread); 81 82 free(thread); 83 } 84 85 struct comm *thread__comm(const struct thread *thread) 86 { 87 if (list_empty(&thread->comm_list)) 88 return NULL; 89 90 return list_first_entry(&thread->comm_list, struct comm, list); 91 } 92 93 struct comm *thread__exec_comm(const struct thread *thread) 94 { 95 struct comm *comm, *last = NULL; 96 97 list_for_each_entry(comm, &thread->comm_list, list) { 98 if (comm->exec) 99 return comm; 100 last = comm; 101 } 102 103 return last; 104 } 105 106 int __thread__set_comm(struct thread *thread, const char *str, u64 timestamp, 107 bool exec) 108 { 109 struct comm *new, *curr = thread__comm(thread); 110 int err; 111 112 /* Override the default :tid entry */ 113 if (!thread->comm_set) { 114 err = comm__override(curr, str, timestamp, exec); 115 if (err) 116 return err; 117 } else { 118 new = comm__new(str, timestamp, exec); 119 if (!new) 120 return -ENOMEM; 121 list_add(&new->list, &thread->comm_list); 122 123 if (exec) 124 unwind__flush_access(thread); 125 } 126 127 thread->comm_set = true; 128 129 return 0; 130 } 131 132 const char *thread__comm_str(const struct thread *thread) 133 { 134 const struct comm *comm = thread__comm(thread); 135 136 if (!comm) 137 return NULL; 138 139 return comm__str(comm); 140 } 141 142 /* CHECKME: it should probably better return the max comm len from its comm list */ 143 int thread__comm_len(struct thread *thread) 144 { 145 if (!thread->comm_len) { 146 const char *comm = thread__comm_str(thread); 147 if (!comm) 148 return 0; 149 thread->comm_len = strlen(comm); 150 } 151 152 return thread->comm_len; 153 } 154 155 size_t thread__fprintf(struct thread *thread, FILE *fp) 156 { 157 return fprintf(fp, "Thread %d %s\n", thread->tid, thread__comm_str(thread)) + 158 map_groups__fprintf(thread->mg, fp); 159 } 160 161 void thread__insert_map(struct thread *thread, struct map *map) 162 { 163 map_groups__fixup_overlappings(thread->mg, map, stderr); 164 map_groups__insert(thread->mg, map); 165 } 166 167 static int thread__clone_map_groups(struct thread *thread, 168 struct thread *parent) 169 { 170 int i; 171 172 /* This is new thread, we share map groups for process. */ 173 if (thread->pid_ == parent->pid_) 174 return 0; 175 176 /* But this one is new process, copy maps. */ 177 for (i = 0; i < MAP__NR_TYPES; ++i) 178 if (map_groups__clone(thread->mg, parent->mg, i) < 0) 179 return -ENOMEM; 180 181 return 0; 182 } 183 184 int thread__fork(struct thread *thread, struct thread *parent, u64 timestamp) 185 { 186 int err; 187 188 if (parent->comm_set) { 189 const char *comm = thread__comm_str(parent); 190 if (!comm) 191 return -ENOMEM; 192 err = thread__set_comm(thread, comm, timestamp); 193 if (err) 194 return err; 195 thread->comm_set = true; 196 } 197 198 thread->ppid = parent->tid; 199 return thread__clone_map_groups(thread, parent); 200 } 201 202 void thread__find_cpumode_addr_location(struct thread *thread, 203 enum map_type type, u64 addr, 204 struct addr_location *al) 205 { 206 size_t i; 207 const u8 const cpumodes[] = { 208 PERF_RECORD_MISC_USER, 209 PERF_RECORD_MISC_KERNEL, 210 PERF_RECORD_MISC_GUEST_USER, 211 PERF_RECORD_MISC_GUEST_KERNEL 212 }; 213 214 for (i = 0; i < ARRAY_SIZE(cpumodes); i++) { 215 thread__find_addr_location(thread, cpumodes[i], type, addr, al); 216 if (al->map) 217 break; 218 } 219 } 220