| 1 | // RUN: %clangxx_nsan -O0 -g %s -o %t |
|---|
| 2 | // RUN: %run %t 2>&1 | FileCheck %s |
|---|
| 3 | |
|---|
| 4 | // RUN: %clangxx_nsan -O3 -g %s -o %t |
|---|
| 5 | // RUN: %run %t 2>&1 | FileCheck %s |
|---|
| 6 | |
|---|
| 7 | #include <cstddef> |
|---|
| 8 | |
|---|
| 9 | #include "helpers.h" |
|---|
| 10 | |
|---|
| 11 | extern "C" void __nsan_dump_shadow_mem(const char *addr, size_t size_bytes, |
|---|
| 12 | size_t bytes_per_line, size_t reserved); |
|---|
| 13 | |
|---|
| 14 | int main() { |
|---|
| 15 | int size = 3 * sizeof(float); |
|---|
| 16 | // Make sure we allocate dynamically: https://godbolt.org/z/T3h998. |
|---|
| 17 | DoNotOptimize(var: size); |
|---|
| 18 | float *array = reinterpret_cast<float *>(__builtin_alloca(size)); |
|---|
| 19 | DoNotOptimize(var: array); |
|---|
| 20 | array[0] = 1.0; |
|---|
| 21 | array[1] = 2.0; |
|---|
| 22 | // The third float is uninitialized. |
|---|
| 23 | __nsan_dump_shadow_mem(addr: (const char *)array, size_bytes: 3 * sizeof(float), bytes_per_line: 16, reserved: 0); |
|---|
| 24 | // CHECK: {{.*}} f0 f1 f2 f3 f0 f1 f2 f3 __ __ __ __ (1.00000000000000000000) (2.00000000000000000000) |
|---|
| 25 | return 0; |
|---|
| 26 | } |
|---|
| 27 | |
|---|
