1 // RUN: %clangxx_asan -O0 -std=c++11 %s -o %t && %run %t 2>&1 | FileCheck %s
2 // RUN: %clangxx_asan -O1 -std=c++11 %s -o %t && %run %t 2>&1 | FileCheck %s
3 // RUN: %clangxx_asan -O2 -std=c++11 %s -o %t && %run %t 2>&1 | FileCheck %s
4 
5 // Test that we do not detect false buffer overflows cased by optimization when
6 // when local variable replaced by a smaller global constant.
7 // https://bugs.llvm.org/show_bug.cgi?id=33372
8 
9 #include <stdio.h>
10 #include <string.h>
11 
12 struct A { int x, y, z; };
13 struct B { A a; /*gap*/ long b; };
14 B *bb;
15 
16 void test1() {
17   A a1 = {1, 1, 2};
18   B b1 = {a1, 6};
19   bb = new B(b1);
20 }
21 
22 const char KKK[] = {1, 1, 2};
23 char bbb[100000];
24 
25 void test2() {
26   char cc[sizeof(bbb)];
27   memcpy(cc, KKK , sizeof(KKK));
28   memcpy(bbb, cc, sizeof(bbb));
29 }
30 
31 int main(int argc, char *argv[]) {
32   test1();
33   test2();
34   printf("PASSED");
35   return 0;
36 }
37 
38 // CHECK-NOT: ERROR: AddressSanitizer
39 // CHECK: PASSED
40