for (long i = 0; i < 2; ++i) {
pthread_create(&threads[i], NULL, thread_function, (void*)i);
}
for (int i = 0; i < 2; ++i) {
pthread_join(threads[i], NULL);
}
return 0;
}
use gcc -pthread -o ASANtest -fsanitize=address -O1 test.c to compile.
I find the error message:
bash-4.4$ ./ASANtest
ASAN:DEADLYSIGNAL
==7076==ERROR: AddressSanitizer: SEGV on unknown address 0x000000000008 (pc 0x7f95439d87d9 bp 0x000000000fff sp 0x7f953f8fde00 T2)
==7076==The signal is caused by a READ memory access.
==7076==Hint: address points to the zero page.
#0 0x7f95439d87d8 in malloc_trim (/lib64/libc.so.6+0x9e7d8)
#1 0x400a8f in thread_function (/workspace/git/ehaauwn/PCPB-22713/2024/eric-pc-routing-engine/raas/product/docker/build/ASANtest+0x400a8f)
#2 0x7f9543d396e9 in start_thread (/lib64/libpthread.so.0+0xa6e9)
#3 0x7f9543a51a8e in clone (/lib64/libc.so.6+0x117a8e)
AddressSanitizer can not provide additional info.
SUMMARY: AddressSanitizer: SEGV (/lib64/libc.so.6+0x9e7d8) in malloc_trim
Thread T2 created by T0 here:
#0 0x7f9543f8bc80 in pthread_create (/usr/lib64/libasan.so.4+0x39c80)
#1 0x400b32 in main (/workspace/git/ehaauwn/PCPB-22713/2024/eric-pc-routing-engine/raas/product/docker/build/ASANtest+0x400b32)
#2 0x400d13 in _IO_stdin_used (/workspace/git/ehaauwn/PCPB-22713/2024/eric-pc-routing-engine/raas/product/docker/build/ASANtest+0x400d13)
==7076==ABORTING
The code shown as below:
include
include
include
include
void thread_function(void arg) { char ptr = (char )malloc(10); printf("%p\n", ptr); free(ptr); malloc_trim(0); pthread_exit(NULL); }
int main() { pthread_t threads[2];
} use gcc -pthread -o ASANtest -fsanitize=address -O1 test.c to compile. I find the error message: bash-4.4$ ./ASANtest ASAN:DEADLYSIGNAL