Hello.
I faced a problem I can't solve by myself so I will be grateful for any
help.
This code causes segfault:
#include <poll.h>
#include <pthread.h>
static void * thread_func (void *arg) {
int count = 0;
struct pollfd pfds[1] = { 0 };
poll(pfds, count, 1000);
}
int main () {
pthread_t thread;
if (pthread_create(&thread, NULL, thread_func, NULL)) return 1;
if (pthread_cancel(thread)) return 2;
if (pthread_join(thread, NULL)) return 3;
return 0;
}
This is how backtrace looks:
Thread 2 received signal SIG32.
Thread 2:
#0 0xb76b24f6 in __poll_nocancel (fds=0xb76a0414, nfds=0, timeout=1000)
at libc/sysdeps/linux/common/poll.c:27
#1 0xb76b2585 in __GI_poll (fds=0xb76a0414, nfds=0, timeout=1000) at
libc/sysdeps/linux/common/poll.c:208
#2 0x080484c3 in thread_func ()
#3 0xb77954b0 in start_thread (arg=0xb76ebba0) at
libpthread/nptl/pthread_create.c:285
#4 0xb76fcae7 in clone () at libc/sysdeps/linux/i386/clone.S:103
Thread 1:
#0 0xb77996f1 in pthread_join (threadid=3077487520, thread_return=0x0)
at libpthread/nptl/pthread_join.c:88
#1 0x08048522 in main ()
Architecture is i386.
Interesting thing is that segmentation fault only happens when uClibc-ng
built with debug enabled (DODEBUG=y).
Thank you.
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