linux之pstack命令
pstack 命令用来显示进程或者线程的栈信息，可以使用pstack来确定进程或者线程挂起的位置。
此命令只有一个参数就是pid
如下使用
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| #include <unistd.h>
#include <pthread.h>
#include <stdio.h>
void* start_run(void* arg) {
sleep(10);
printf("%s\n", arg);
return NULL;
}
int main() {
pthread_t thread1;
int ret = pthread_create(&thread1, NULL, start_run, (char*)"hello");
if (ret != 0) {
printf("pthread create failed");
return -1;
}
ret = pthread_join(thread1, NULL);
if (ret != 0) {
printf("pthread join failed");
return -1;
}
return 0;
}
|
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| root@xxx:learn#pstack 28603
Thread 2 (Thread 0x7f8649c9c700 (LWP 28604)):
#0 0x00007f8649f668ed in nanosleep () from /usr/lib64/libc.so.6
#1 0x00007f8649f66784 in sleep () from /usr/lib64/libc.so.6
#2 0x000000000040068d in start_run(void*) ()
#3 0x00007f864a276ea5 in start_thread () from /usr/lib64/libpthread.so.0
#4 0x00007f8649f9f9fd in clone () from /usr/lib64/libc.so.6
Thread 1 (Thread 0x7f864a58c740 (LWP 28603)):
#0 0x00007f864a278017 in pthread_join () from /usr/lib64/libpthread.so.0
#1 0x00000000004006f3 in main ()
|
就可以看到每个线程当前栈信息。利于排查问题。