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 = {.x: 1, .y: 1, .z: 2}; |
18 | B b1 = {.a: a1, .b: 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(dest: cc, src: KKK , n: sizeof(KKK)); |
28 | memcpy(dest: bbb, src: cc, n: sizeof(bbb)); |
29 | } |
30 | |
31 | int main(int argc, char *argv[]) { |
32 | test1(); |
33 | test2(); |
34 | printf(format: "PASSED" ); |
35 | return 0; |
36 | } |
37 | |
38 | // CHECK-NOT: ERROR: AddressSanitizer |
39 | // CHECK: PASSED |
40 | |