diff options
author | Vitaly Buka <vitalybuka@google.com> | 2018-03-24 07:45:24 +0000 |
---|---|---|
committer | Vitaly Buka <vitalybuka@google.com> | 2018-03-24 07:45:24 +0000 |
commit | 6a3cda135ae93355184917e134e0026348925a0f (patch) | |
tree | 960f84581db357c07b5e601b640dcad5cb053356 /test/sanitizer_common | |
parent | 69eddd514afd59184bb25f87dff8880144395fb7 (diff) |
Mmap interceptor providing mprotect support
Summary:
- Intercepting mprotect calls.
- Fixing forgotten flag check.
Patch by David CARLIER
Reviewers: vitalybuka, vsk
Subscribers: delcypher, srhines, kubamracek, llvm-commits, #sanitizers
Differential Revision: https://reviews.llvm.org/D44777
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@328415 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/sanitizer_common')
-rw-r--r-- | test/sanitizer_common/TestCases/Linux/mmap_write_exec.cpp | 26 |
1 files changed, 24 insertions, 2 deletions
diff --git a/test/sanitizer_common/TestCases/Linux/mmap_write_exec.cpp b/test/sanitizer_common/TestCases/Linux/mmap_write_exec.cpp index 6b7271735..49495403c 100644 --- a/test/sanitizer_common/TestCases/Linux/mmap_write_exec.cpp +++ b/test/sanitizer_common/TestCases/Linux/mmap_write_exec.cpp @@ -1,15 +1,37 @@ // RUN: %clangxx %s -o %t // RUN: %env_tool_opts=detect_write_exec=1 %run %t 2>&1 | FileCheck %s -// ubsan and lsan do not install mmap interceptors -// UNSUPPORTED: ubsan, lsan +// RUN: %env_tool_opts=detect_write_exec=0 %run %t 2>&1 | FileCheck %s \ +// RUN: --check-prefix=CHECK-DISABLED +// ubsan and lsan do not install mmap interceptors UNSUPPORTED: ubsan, lsan // TODO: Fix option on Android, it hangs there for unknown reasons. // XFAIL: android +#include <stdio.h> #include <sys/mman.h> int main(int argc, char **argv) { char *p = (char *)mmap(0, 1024, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_ANONYMOUS | MAP_PRIVATE, -1, 0); // CHECK: WARNING: {{.*}}Sanitizer: writable-executable page usage + // CHECK: #{{[0-9]+.*}}main{{.*}}mmap_write_exec.cpp:[[@LINE-3]] + // CHECK: SUMMARY: {{.*}}Sanitizer: w-and-x-usage + + char *q = (char *)mmap(p, 64, PROT_READ | PROT_WRITE, + MAP_ANONYMOUS | MAP_PRIVATE | MAP_FIXED, -1, 0); + (void)mprotect(q, 64, PROT_WRITE | PROT_EXEC); + // CHECK: WARNING: {{.*}}Sanitizer: writable-executable page usage + // CHECK: #{{[0-9]+.*}}main{{.*}}mmap_write_exec.cpp:[[@LINE-2]] + // CHECK: SUMMARY: {{.*}}Sanitizer: w-and-x-usage + + char *a = (char *)mmap(0, 1024, PROT_READ | PROT_WRITE, + MAP_ANONYMOUS | MAP_PRIVATE, -1, 0); + char *b = (char *)mmap(a, 64, PROT_READ | PROT_WRITE, + MAP_ANONYMOUS | MAP_PRIVATE | MAP_FIXED, -1, 0); + (void)mprotect(q, 64, PROT_READ | PROT_EXEC); + // CHECK-NOT: Sanitizer + + printf("done\n"); + // CHECK-DISABLED-NOT: Sanitizer + // CHECK-DISABLED: done } |