| 1 | // Make sure we do not segfault when checking an address close to kLowMemEnd. |
|---|
| 2 | // RUN: %clang_hwasan %s -o %t |
|---|
| 3 | // RUN: not %run %t 2>&1 | FileCheck %s --check-prefix=CHECK |
|---|
| 4 | |
|---|
| 5 | // REQUIRES: aarch64-target-arch || riscv64-target-arch |
|---|
| 6 | |
|---|
| 7 | #include <sanitizer/hwasan_interface.h> |
|---|
| 8 | #include <stdio.h> |
|---|
| 9 | #include <stdlib.h> |
|---|
| 10 | #include <sys/mman.h> |
|---|
| 11 | |
|---|
| 12 | static volatile char sink; |
|---|
| 13 | extern void *__hwasan_shadow_memory_dynamic_address; |
|---|
| 14 | |
|---|
| 15 | int main(int argc, char **argv) { |
|---|
| 16 | void *high_addr = (char *)__hwasan_shadow_memory_dynamic_address - 0x1000; |
|---|
| 17 | void *r = mmap(addr: high_addr, len: 4096, PROT_READ, MAP_FIXED | MAP_ANON | MAP_PRIVATE, |
|---|
| 18 | fd: -1, offset: 0); |
|---|
| 19 | if (r == MAP_FAILED) { |
|---|
| 20 | fprintf(stderr, format: "Failed to mmap\n" ); |
|---|
| 21 | abort(); |
|---|
| 22 | } |
|---|
| 23 | volatile char *x = (char *)__hwasan_tag_pointer(p: r, tag: 4); |
|---|
| 24 | sink = *x; |
|---|
| 25 | } |
|---|
| 26 | |
|---|
| 27 | // CHECK-NOT: Failed to mmap |
|---|
| 28 | // CHECK-NOT: Segmentation fault |
|---|
| 29 | // CHECK-NOT: SEGV |
|---|
| 30 | |
|---|
