1 // RUN: %clangxx %s -o %t 2 // RUN: %env_tool_opts=detect_write_exec=1 %run %t 2>&1 | FileCheck %s 3 // RUN: %env_tool_opts=detect_write_exec=0 %run %t 2>&1 | FileCheck %s \ 4 // RUN: --check-prefix=CHECK-DISABLED 5 // ubsan and lsan do not install mmap interceptors UNSUPPORTED: ubsan, lsan 6 7 // TODO: Fix option on Android, it hangs there for unknown reasons. 8 // XFAIL: android 9 10 #include <pthread.h> 11 #include <stdio.h> 12 #include <sys/mman.h> 13 14 int main(int argc, char **argv) { 15 char *p = (char *)mmap(0, 1024, PROT_READ | PROT_WRITE | PROT_EXEC, 16 MAP_ANONYMOUS | MAP_PRIVATE, -1, 0); 17 // CHECK: WARNING: {{.*}}Sanitizer: writable-executable page usage 18 // CHECK: #{{[0-9]+.*}}main{{.*}}mmap_write_exec.cpp:[[@LINE-3]] 19 // CHECK: SUMMARY: {{.*}}Sanitizer: w-and-x-usage 20 21 char *q = (char *)mmap(p, 64, PROT_READ | PROT_WRITE, 22 MAP_ANONYMOUS | MAP_PRIVATE | MAP_FIXED, -1, 0); 23 (void)mprotect(q, 64, PROT_WRITE | PROT_EXEC); 24 // CHECK: WARNING: {{.*}}Sanitizer: writable-executable page usage 25 // CHECK: #{{[0-9]+.*}}main{{.*}}mmap_write_exec.cpp:[[@LINE-2]] 26 // CHECK: SUMMARY: {{.*}}Sanitizer: w-and-x-usage 27 28 char *a = (char *)mmap(0, 1024, PROT_READ | PROT_WRITE, 29 MAP_ANONYMOUS | MAP_PRIVATE, -1, 0); 30 char *b = (char *)mmap(a, 64, PROT_READ | PROT_WRITE, 31 MAP_ANONYMOUS | MAP_PRIVATE | MAP_FIXED, -1, 0); 32 (void)mprotect(q, 64, PROT_READ | PROT_EXEC); 33 // CHECK-NOT: Sanitizer 34 #if defined(__APPLE__) 35 pthread_jit_write_protect_np(false); 36 char *c = (char *)mmap(0, 128, PROT_WRITE | PROT_EXEC, 37 MAP_ANONYMOUS | MAP_PRIVATE | MAP_JIT, -1, 0); 38 // CHECK-NOT: Sanitizer 39 #endif 40 41 printf("done\n"); 42 // CHECK-DISABLED-NOT: Sanitizer 43 // CHECK-DISABLED: done 44 } 45