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// RUN: %clang_hwasan %s -o %t && not %env_hwasan_opts=verbose_threads=1 %run %t 2>&1 | FileCheck %s
// REQUIRES: stable-runtime
#include <pthread.h>
#include <stdlib.h>
#include <stdio.h>
#include <sanitizer/hwasan_interface.h>
void *BoringThread(void *arg) {
char * volatile x = (char*)malloc(10);
x[5] = 0;
free(x);
return NULL;
}
// CHECK: Creating : T0
// CHECK: Creating : T1
// CHECK: Destroying: T1
// CHECK: Creating : T1100
// CHECK: Destroying: T1100
// CHECK: Creating : T1101
void *UAFThread(void *arg) {
char * volatile x = (char*)malloc(10);
fprintf(stderr, "ZZZ %p\n", x);
free(x);
x[5] = 42;
// CHECK: ERROR: HWAddressSanitizer: tag-mismatch on address
// CHECK: WRITE of size 1
// CHECK: many-threads-uaf.c:[[@LINE-3]]
// CHECK: Thread: T1101
return NULL;
}
int main() {
__hwasan_enable_allocator_tagging();
pthread_t t;
for (int i = 0; i < 1100; i++) {
pthread_create(&t, NULL, BoringThread, NULL);
pthread_join(t, NULL);
}
pthread_create(&t, NULL, UAFThread, NULL);
pthread_join(t, NULL);
}
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