mirror of
https://github.com/llvm/llvm-project.git
synced 2025-04-18 01:26:38 +00:00
f6c701054e
Summary: When deallocating thread stacks, we use one thread's unsafe stack size to deallocate another thread's unsafe stack; however, the two sizes may differ. Record an unsafe stack's size in the thread stack linked list. Reviewers: pcc, eugenis Reviewed By: eugenis Subscribers: delcypher, llvm-commits, #sanitizers, kcc Differential Revision: https://reviews.llvm.org/D51016 llvm-svn: 340308
54 lines
1.1 KiB
C
54 lines
1.1 KiB
C
// RUN: %clang_safestack %s -pthread -o %t
|
|
// RUN: %run %t
|
|
|
|
// Test unsafe stack deallocation with custom stack sizes, in particular ensure
|
|
// that we correctly deallocate small stacks and don't accidentally deallocate
|
|
// adjacent memory.
|
|
|
|
#include <pthread.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
|
|
volatile int step = 0;
|
|
|
|
void *wait_until(void *ptr) {
|
|
while ((int)ptr != step)
|
|
usleep(1000);
|
|
|
|
volatile char buf[64];
|
|
buf[0] = 0;
|
|
|
|
return NULL;
|
|
}
|
|
|
|
int main(int argc, char **argv) {
|
|
pthread_t t1, t2, t3;
|
|
|
|
pthread_attr_t small_stack_attr;
|
|
pthread_attr_init(&small_stack_attr);
|
|
pthread_attr_setstacksize(&small_stack_attr, 65536);
|
|
|
|
if (pthread_create(&t3, NULL, wait_until, (void *)3))
|
|
abort();
|
|
if (pthread_create(&t1, &small_stack_attr, wait_until, (void *)1))
|
|
abort();
|
|
if (pthread_create(&t2, NULL, wait_until, (void *)2))
|
|
abort();
|
|
|
|
step = 1;
|
|
if (pthread_join(t1, NULL))
|
|
abort();
|
|
|
|
step = 2;
|
|
if (pthread_join(t2, NULL))
|
|
abort();
|
|
|
|
step = 3;
|
|
if (pthread_join(t3, NULL))
|
|
abort();
|
|
|
|
pthread_attr_destroy(&small_stack_attr);
|
|
return 0;
|
|
}
|