| 1 | // RUN: %clangxx %s -o %t |
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| 2 | // RUN: %env_tool_opts=detect_write_exec=1 %run %t 2>&1 | FileCheck %s |
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| 3 | // RUN: %env_tool_opts=detect_write_exec=0 %run %t 2>&1 | FileCheck %s \ |
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| 4 | // RUN: --check-prefix=CHECK-DISABLED |
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| 5 | // ubsan and lsan do not install mmap interceptors UNSUPPORTED: ubsan, lsan |
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| 6 | |
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| 7 | // TODO: Fix option on Android, it hangs there for unknown reasons. |
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| 8 | // XFAIL: android |
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| 9 | |
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| 10 | #if defined(__APPLE__) |
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| 11 | #include <Availability.h> |
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| 12 | #endif |
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| 13 | #include <pthread.h> |
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| 14 | #include <stdio.h> |
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| 15 | #include <sys/mman.h> |
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| 16 | |
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| 17 | int main(int argc, char **argv) { |
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| 18 | char *p = (char *)mmap(addr: 0, len: 1024, PROT_READ | PROT_WRITE | PROT_EXEC, |
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| 19 | MAP_ANONYMOUS | MAP_PRIVATE, fd: -1, offset: 0); |
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| 20 | // CHECK: WARNING: {{.*}}Sanitizer: writable-executable page usage |
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| 21 | // CHECK: #{{[0-9]+.*}}main{{.*}}mmap_write_exec.cpp:[[@LINE-3]] |
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| 22 | // CHECK: SUMMARY: {{.*}}Sanitizer: w-and-x-usage |
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| 23 | |
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| 24 | char *q = (char *)mmap(addr: p, len: 64, PROT_READ | PROT_WRITE, |
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| 25 | MAP_ANONYMOUS | MAP_PRIVATE | MAP_FIXED, fd: -1, offset: 0); |
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| 26 | (void)mprotect(addr: q, len: 64, PROT_WRITE | PROT_EXEC); |
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| 27 | // CHECK: WARNING: {{.*}}Sanitizer: writable-executable page usage |
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| 28 | // CHECK: #{{[0-9]+.*}}main{{.*}}mmap_write_exec.cpp:[[@LINE-2]] |
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| 29 | // CHECK: SUMMARY: {{.*}}Sanitizer: w-and-x-usage |
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| 30 | |
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| 31 | char *a = (char *)mmap(addr: 0, len: 1024, PROT_READ | PROT_WRITE, |
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| 32 | MAP_ANONYMOUS | MAP_PRIVATE, fd: -1, offset: 0); |
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| 33 | char *b = (char *)mmap(addr: a, len: 64, PROT_READ | PROT_WRITE, |
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| 34 | MAP_ANONYMOUS | MAP_PRIVATE | MAP_FIXED, fd: -1, offset: 0); |
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| 35 | (void)mprotect(addr: q, len: 64, PROT_READ | PROT_EXEC); |
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| 36 | // CHECK-NOT: Sanitizer |
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| 37 | #if defined(__APPLE__) |
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| 38 | # if (defined(__MAC_OS_X_VERSION_MIN_REQUIRED) && \ |
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| 39 | __MAC_OS_X_VERSION_MIN_REQUIRED >= 110000) |
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| 40 | pthread_jit_write_protect_np(false); |
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| 41 | # endif |
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| 42 | char *c = (char *)mmap(0, 128, PROT_WRITE | PROT_EXEC, |
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| 43 | MAP_ANONYMOUS | MAP_PRIVATE | MAP_JIT, -1, 0); |
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| 44 | // CHECK-NOT: Sanitizer |
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| 45 | #endif |
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| 46 | |
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| 47 | printf(format: "done\n" ); |
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| 48 | // CHECK-DISABLED-NOT: Sanitizer |
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| 49 | // CHECK-DISABLED: done |
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| 50 | } |
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| 51 | |
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