pthread_join期间的分段错误

Question

#define SIZE 3 
#define MAX_THREADS 9 
int main() {
...
pthread_t m_threads[MAX_THREADS];
int t_num = 0;
for (int i = 0; i < SIZE; ++i) {
for (int j = 0; j < SIZE; ++j) {
...
pthread_create(&m_threads[i], NULL, multiply, (void *) &td[t_num]);
t_num++;
}
}
for( int i = 0; i < MAX_THREADS; i++ ) {
pthread_join(m_threads[i], NULL);
}
return 0;
}

我正在创建 9 个线程来执行一些矩阵乘法。计算成功。但是当我尝试加入线程时，程序崩溃了。程序在 for 循环的第 4 次迭代期间执行pthread_join(m_threads[i], NULL)时崩溃。

调试程序时，我从GDB得到这个分段错误。

Thread 1 "Pthread" received signal SIGSEGV, Segmentation fault.
0x00007f7d0063ac9f in __free_tcb () from /lib/x86_64-linux-gnu/libpthread.so.0
Program terminated with signal SIGSEGV, Segmentation fault.
The program no longer exists.

Answer 1

修改pthread_create(&m_threads[i]以pthread_create(&m_threads[t_num]解决了问题。