1// Tests ASAN_OPTIONS=allocator_release_to_os=1
2
3// RUN: %clangxx_asan -std=c++11 %s -o %t
4// RUN: %env_asan_opts=allocator_release_to_os_interval_ms=0 %run %t 2>&1 | FileCheck %s --check-prefix=RELEASE
5// RUN: %env_asan_opts=allocator_release_to_os_interval_ms=-1 %run %t 2>&1 | FileCheck %s --check-prefix=NO_RELEASE
6// RUN: %env_asan_opts=allocator_release_to_os_interval_ms=-1 %run %t force 2>&1 | FileCheck %s --check-prefix=FORCE_RELEASE
7
8// REQUIRES: x86_64-target-arch
9
10#include <algorithm>
11#include <assert.h>
12#include <random>
13#include <stdint.h>
14#include <stdio.h>
15#include <stdlib.h>
16#include <string.h>
17
18#include <sanitizer/allocator_interface.h>
19#include <sanitizer/asan_interface.h>
20
21void MallocReleaseStress() {
22 const size_t kNumChunks = 10000;
23 const size_t kAllocSize = 100;
24 const size_t kNumIter = 100;
25 uintptr_t *chunks[kNumChunks] = {0};
26 std::mt19937 r;
27
28 for (size_t iter = 0; iter < kNumIter; iter++) {
29 std::shuffle(first: chunks, last: chunks + kNumChunks, g&: r);
30 size_t to_replace = rand() % kNumChunks;
31 for (size_t i = 0; i < kNumChunks; i++) {
32 if (chunks[i])
33 assert(chunks[i][0] == (uintptr_t)chunks[i]);
34 if (i < to_replace) {
35 delete [] chunks[i];
36 chunks[i] = new uintptr_t[kAllocSize];
37 chunks[i][0] = (uintptr_t)chunks[i];
38 }
39 }
40 }
41 for (auto p : chunks)
42 delete[] p;
43}
44
45int main(int argc, char **argv) {
46 MallocReleaseStress();
47 if (argc > 1 && !strcmp(s1: "force", s2: argv[1]))
48 __sanitizer_purge_allocator();
49 __asan_print_accumulated_stats();
50}
51
52// RELEASE: mapped:{{.*}}releases: {{[1-9]}}
53// NO_RELEASE: mapped:{{.*}}releases: 0
54// FORCE_RELEASE: mapped:{{.*}}releases: {{[1-9]}}
55

source code of compiler-rt/test/asan/TestCases/Linux/release_to_os_test.cpp