xref: /llvm-project/compiler-rt/test/asan/TestCases/alloca_detect_custom_size_.cpp (revision 985580d7c03c3d0790706089d1f526094dba92ae)
1 // RUN: %clangxx_asan -O0 -mllvm -asan-instrument-dynamic-allocas %s -o %t
2 // RUN: not %run %t 2>&1 | FileCheck %s
3 //
4 
5 #include <assert.h>
6 #include <stdint.h>
7 
8 struct A {
9   char a[3];
10   int b[3];
11 };
12 
foo(int index,int len)13 __attribute__((noinline)) void foo(int index, int len) {
14   volatile struct A str[len] __attribute__((aligned(32)));
15   assert(!(reinterpret_cast<uintptr_t>(str) & 31L));
16   str[index].a[0] = '1'; // BOOM
17 // CHECK: ERROR: AddressSanitizer: dynamic-stack-buffer-overflow on address [[ADDR:0x[0-9a-f]+]]
18 // CHECK: WRITE of size 1 at [[ADDR]] thread T0
19 }
20 
main(int argc,char ** argv)21 int main(int argc, char **argv) {
22   foo(10, 10);
23   return 0;
24 }
25