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 #if defined(__APPLE__) 11 #include <Availability.h> 12 #endif 13 #include <pthread.h> 14 #include <stdio.h> 15 #include <sys/mman.h> 16 17 int 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 usage 21 // CHECK: #{{[0-9]+.*}}main{{.*}}mmap_write_exec.cpp:[[@LINE-3]] 22 // CHECK: SUMMARY: {{.*}}Sanitizer: w-and-x-usage 23 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 usage 28 // CHECK: #{{[0-9]+.*}}main{{.*}}mmap_write_exec.cpp:[[@LINE-2]] 29 // CHECK: SUMMARY: {{.*}}Sanitizer: w-and-x-usage 30 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: Sanitizer 37 #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 # endif 42 char *c = (char *)mmap(0, 128, PROT_WRITE | PROT_EXEC, 43 MAP_ANONYMOUS | MAP_PRIVATE | MAP_JIT, -1, 0); 44 // CHECK-NOT: Sanitizer 45 #endif 46 47 printf("done\n"); 48 // CHECK-DISABLED-NOT: Sanitizer 49 // CHECK-DISABLED: done 50 } 51