51 lines · cpp
1// RUN: %clangxx %s -o %t2// RUN: %env_tool_opts=detect_write_exec=1 %run %t 2>&1 | FileCheck %s3// RUN: %env_tool_opts=detect_write_exec=0 %run %t 2>&1 | FileCheck %s \4// RUN: --check-prefix=CHECK-DISABLED5// ubsan and lsan do not install mmap interceptors UNSUPPORTED: ubsan, lsan6 7// TODO: Fix option on Android, it hangs there for unknown reasons.8// XFAIL: android9 10#if defined(__APPLE__)11#include <Availability.h>12#endif13#include <pthread.h>14#include <stdio.h>15#include <sys/mman.h>16 17int main(int argc, char **argv) {18 char *p = (char *)mmap(0, 1024, PROT_READ | PROT_WRITE | PROT_EXEC,19 MAP_ANONYMOUS | MAP_PRIVATE, -1, 0);20 // CHECK: WARNING: {{.*}}Sanitizer: writable-executable page usage21 // CHECK: #{{[0-9]+.*}}main{{.*}}mmap_write_exec.cpp:[[@LINE-3]]22 // CHECK: SUMMARY: {{.*}}Sanitizer: w-and-x-usage23 24 char *q = (char *)mmap(p, 64, PROT_READ | PROT_WRITE,25 MAP_ANONYMOUS | MAP_PRIVATE | MAP_FIXED, -1, 0);26 (void)mprotect(q, 64, PROT_WRITE | PROT_EXEC);27 // CHECK: WARNING: {{.*}}Sanitizer: writable-executable page usage28 // CHECK: #{{[0-9]+.*}}main{{.*}}mmap_write_exec.cpp:[[@LINE-2]]29 // CHECK: SUMMARY: {{.*}}Sanitizer: w-and-x-usage30 31 char *a = (char *)mmap(0, 1024, PROT_READ | PROT_WRITE,32 MAP_ANONYMOUS | MAP_PRIVATE, -1, 0);33 char *b = (char *)mmap(a, 64, PROT_READ | PROT_WRITE,34 MAP_ANONYMOUS | MAP_PRIVATE | MAP_FIXED, -1, 0);35 (void)mprotect(q, 64, PROT_READ | PROT_EXEC);36 // CHECK-NOT: Sanitizer37#if defined(__APPLE__)38# if (defined(__MAC_OS_X_VERSION_MIN_REQUIRED) && \39 __MAC_OS_X_VERSION_MIN_REQUIRED >= 110000)40 pthread_jit_write_protect_np(false);41# endif42 char *c = (char *)mmap(0, 128, PROT_WRITE | PROT_EXEC,43 MAP_ANONYMOUS | MAP_PRIVATE | MAP_JIT, -1, 0);44 // CHECK-NOT: Sanitizer45#endif46 47 printf("done\n");48 // CHECK-DISABLED-NOT: Sanitizer49 // CHECK-DISABLED: done50}51