void *thr1(void *arg)
{
- printf("thread 1, thread id : %lu, pid %lu\n", pthread_self(), getpid());
+ printf("thread 1, thread id : %lu, pid %lu\n", pthread_self(), getpid());
- while(1) {
+ while(1) {
trace_user_generic_string("Hello world! Have a nice day.");
sleep(2);
}
-
- return ((void*)1);
-
+ pthread_exit((void*)1);
}
+
+/* Example of a _bad_ thread, which still works with the tracing */
void *thr2(void *arg)
{
- printf("thread 2, thread id : %lu, pid %lu\n", pthread_self(), getpid());
+ printf("thread 2, thread id : %lu, pid %lu\n", pthread_self(), getpid());
sleep(1);
- while(1) {
+ while(1) {
trace_user_generic_string("Hello world! Have a nice day.");
- sleep(2);
- }
- return ((void*)2);
+ sleep(2);
+ }
+ return ((void*)2);
}
printf("Will trace the following string : Hello world! Have a nice day.\n");
printf("Press CTRL-C to stop.\n");
- printf("No file is created with this example : it logs through a kernel\n");
- printf("system call. See the LTTng lttctl command to start tracing.\n\n");
+ printf("No file is created with this example : it logs through a kernel\n");
+ printf("system call. See the LTTng lttctl command to start tracing.\n\n");
- printf("thread main, thread id : %lu, pid %lu\n", pthread_self(), getpid());
- err = pthread_create(&tid1, NULL, thr1, NULL);
- if(err!=0) exit(1);
+ printf("thread main, thread id : %lu, pid %lu\n", pthread_self(), getpid());
+ err = pthread_create(&tid1, NULL, thr1, NULL);
+ if(err!=0) exit(1);
- err = pthread_create(&tid2, NULL, thr2, NULL);
- if(err!=0) exit(1);
+ err = pthread_create(&tid2, NULL, thr2, NULL);
+ if(err!=0) exit(1);
- err = pthread_join(tid1, &tret);
- if(err!= 0) exit(1);
+ err = pthread_join(tid1, &tret);
+ if(err!= 0) exit(1);
- err = pthread_join(tid2, &tret);
- if(err!= 0) exit(1);
-
- return 0;
+ err = pthread_join(tid2, &tret);
+ if(err!= 0) exit(1);
+
+ return 0;
}