1// RUN: %clangxx_asan -O0 %s --std=c++14 -o %t
2
3// RUN: not %run %t 10 0 2>&1 | FileCheck %s --check-prefixes=CHECK,T0
4// RUN: not %run %t 10000000 0 2>&1 | FileCheck %s --check-prefixes=CHECK,T0
5
6// RUN: not %run %t 10 1 2>&1 | FileCheck %s --check-prefixes=CHECK,T1
7// RUN: not %run %t 10000000 1 2>&1 | FileCheck %s --check-prefixes=CHECK,T1
8
9// REQUIRES: stable-runtime
10
11#include <sanitizer/asan_interface.h>
12#include <stdlib.h>
13#include <thread>
14
15void UPDATE(void *p) {
16 __asan_update_allocation_context(addr: p);
17}
18
19int main(int argc, char *argv[]) {
20 char *x = (char *)malloc(size: atoi(nptr: argv[1]) * sizeof(char));
21 if (atoi(nptr: argv[2]))
22 std::thread([&]() { UPDATE(x); }).join();
23 else
24 UPDATE(p: x);
25 free(ptr: x);
26 return x[5];
27 // CHECK: {{.*ERROR: AddressSanitizer: heap-use-after-free on address}}
28 // CHECK: READ of size 1 at {{.*}} thread T0
29 // T0: allocated by thread T0 here
30 // T1: allocated by thread T1 here
31 // CHECK: UPDATE
32}
33

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