1// RUN: %clangxx_asan -O0 %s -pthread -o %t && %run %t
2// RUN: %clangxx_asan -O2 %s -pthread -o %t && %run %t
3// REQUIRES: stable-runtime
4
5#include <assert.h>
6#include <pthread.h>
7#include <sanitizer/allocator_interface.h>
8#include <stdio.h>
9#include <stdlib.h>
10
11const size_t kLargeAlloc = 1UL << 20;
12
13void* allocate(void *arg) {
14 volatile void *ptr = malloc(size: kLargeAlloc);
15 free(ptr: (void*)ptr);
16 return 0;
17}
18
19void* check_stats(void *arg) {
20 assert(__sanitizer_get_current_allocated_bytes() >= 0);
21 return 0;
22}
23
24int main() {
25 size_t used_mem = __sanitizer_get_current_allocated_bytes();
26 printf(format: "Before: %zu\n", used_mem);
27 const int kNumIterations = 1000;
28 for (int iter = 0; iter < kNumIterations; iter++) {
29 pthread_t thr[4];
30 for (int j = 0; j < 4; j++) {
31 assert(0 ==
32 pthread_create(&thr[j], 0, (j < 2) ? allocate : check_stats, 0));
33 }
34 for (int j = 0; j < 4; j++)
35 assert(0 == pthread_join(thr[j], 0));
36 used_mem = __sanitizer_get_current_allocated_bytes();
37 if (used_mem > kLargeAlloc) {
38 printf(format: "After iteration %d: %zu\n", iter, used_mem);
39 return 1;
40 }
41 }
42 printf(format: "Success after %d iterations\n", kNumIterations);
43 return 0;
44}
45

source code of compiler-rt/test/asan/TestCases/Posix/current_allocated_bytes.cpp