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