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 #include "unwind.h" 11 12 int thread__init_map_groups(struct thread *thread, struct machine *machine) 13 { 14 struct thread *leader; 15 pid_t pid = thread->pid_; 16 17 if (pid == thread->tid || pid == -1) { 18 thread->mg = map_groups__new(); 19 } else { 20 leader = machine__findnew_thread(machine, pid, pid); 21 if (leader) 22 thread->mg = map_groups__get(leader->mg); 23 } 24 25 return thread->mg ? 0 : -1; 26 } 27 28 struct thread *thread__new(pid_t pid, pid_t tid) 29 { 30 char *comm_str; 31 struct comm *comm; 32 struct thread *thread = zalloc(sizeof(*thread)); 33 34 if (thread != NULL) { 35 thread->pid_ = pid; 36 thread->tid = tid; 37 thread->ppid = -1; 38 thread->cpu = -1; 39 INIT_LIST_HEAD(&thread->comm_list); 40 41 if (unwind__prepare_access(thread) < 0) 42 goto err_thread; 43 44 comm_str = malloc(32); 45 if (!comm_str) 46 goto err_thread; 47 48 snprintf(comm_str, 32, ":%d", tid); 49 comm = comm__new(comm_str, 0, false); 50 free(comm_str); 51 if (!comm) 52 goto err_thread; 53 54 list_add(&comm->list, &thread->comm_list); 55 56 } 57 58 return thread; 59 60 err_thread: 61 free(thread); 62 return NULL; 63 } 64 65 void thread__delete(struct thread *thread) 66 { 67 struct comm *comm, *tmp; 68 69 if (thread->mg) { 70 map_groups__put(thread->mg); 71 thread->mg = NULL; 72 } 73 list_for_each_entry_safe(comm, tmp, &thread->comm_list, list) { 74 list_del(&comm->list); 75 comm__free(comm); 76 } 77 unwind__finish_access(thread); 78 79 free(thread); 80 } 81 82 struct comm *thread__comm(const struct thread *thread) 83 { 84 if (list_empty(&thread->comm_list)) 85 return NULL; 86 87 return list_first_entry(&thread->comm_list, struct comm, list); 88 } 89 90 struct comm *thread__exec_comm(const struct thread *thread) 91 { 92 struct comm *comm, *last = NULL; 93 94 list_for_each_entry(comm, &thread->comm_list, list) { 95 if (comm->exec) 96 return comm; 97 last = comm; 98 } 99 100 return last; 101 } 102 103 /* CHECKME: time should always be 0 if event aren't ordered */ 104 int __thread__set_comm(struct thread *thread, const char *str, u64 timestamp, 105 bool exec) 106 { 107 struct comm *new, *curr = thread__comm(thread); 108 int err; 109 110 /* Override latest entry if it had no specific time coverage */ 111 if (!curr->start && !curr->exec) { 112 err = comm__override(curr, str, timestamp, exec); 113 if (err) 114 return err; 115 } else { 116 new = comm__new(str, timestamp, exec); 117 if (!new) 118 return -ENOMEM; 119 list_add(&new->list, &thread->comm_list); 120 121 if (exec) 122 unwind__flush_access(thread); 123 } 124 125 thread->comm_set = true; 126 127 return 0; 128 } 129 130 const char *thread__comm_str(const struct thread *thread) 131 { 132 const struct comm *comm = thread__comm(thread); 133 134 if (!comm) 135 return NULL; 136 137 return comm__str(comm); 138 } 139 140 /* CHECKME: it should probably better return the max comm len from its comm list */ 141 int thread__comm_len(struct thread *thread) 142 { 143 if (!thread->comm_len) { 144 const char *comm = thread__comm_str(thread); 145 if (!comm) 146 return 0; 147 thread->comm_len = strlen(comm); 148 } 149 150 return thread->comm_len; 151 } 152 153 size_t thread__fprintf(struct thread *thread, FILE *fp) 154 { 155 return fprintf(fp, "Thread %d %s\n", thread->tid, thread__comm_str(thread)) + 156 map_groups__fprintf(thread->mg, fp); 157 } 158 159 void thread__insert_map(struct thread *thread, struct map *map) 160 { 161 map_groups__fixup_overlappings(thread->mg, map, stderr); 162 map_groups__insert(thread->mg, map); 163 } 164 165 static int thread__clone_map_groups(struct thread *thread, 166 struct thread *parent) 167 { 168 int i; 169 170 /* This is new thread, we share map groups for process. */ 171 if (thread->pid_ == parent->pid_) 172 return 0; 173 174 /* But this one is new process, copy maps. */ 175 for (i = 0; i < MAP__NR_TYPES; ++i) 176 if (map_groups__clone(thread->mg, parent->mg, i) < 0) 177 return -ENOMEM; 178 179 return 0; 180 } 181 182 int thread__fork(struct thread *thread, struct thread *parent, u64 timestamp) 183 { 184 int err; 185 186 if (parent->comm_set) { 187 const char *comm = thread__comm_str(parent); 188 if (!comm) 189 return -ENOMEM; 190 err = thread__set_comm(thread, comm, timestamp); 191 if (err) 192 return err; 193 thread->comm_set = true; 194 } 195 196 thread->ppid = parent->tid; 197 return thread__clone_map_groups(thread, parent); 198 } 199 200 void thread__find_cpumode_addr_location(struct thread *thread, 201 struct machine *machine, 202 enum map_type type, u64 addr, 203 struct addr_location *al) 204 { 205 size_t i; 206 const u8 const cpumodes[] = { 207 PERF_RECORD_MISC_USER, 208 PERF_RECORD_MISC_KERNEL, 209 PERF_RECORD_MISC_GUEST_USER, 210 PERF_RECORD_MISC_GUEST_KERNEL 211 }; 212 213 for (i = 0; i < ARRAY_SIZE(cpumodes); i++) { 214 thread__find_addr_location(thread, machine, cpumodes[i], type, 215 addr, al); 216 if (al->map) 217 break; 218 } 219 } 220