shylie/llvm-project
1
0
Fork 0
Code Issues Pull Requests Actions 6 Packages Projects Releases Wiki Activity

Frontend: Define __SANITIZE_*__ macros for certain sanitizers.

Browse Source 
Per discussion with @ojhunt and @AaronBallman we are moving towards
predefined macros and away from __has_feature and __has_extension
for detecting sanitizers and other similar features. The rationale
is that __has_feature is only really meant for standardized features
(see the comment at the top of clang/include/clang/Basic/Features.def),
and __has_extension has the issues discovered as part of #153104.

Let's start by defining macros for ASan, HWASan and TSan, consistently
with gcc.

Reviewers: vitalybuka, ojhunt, AaronBallman, fmayer

Reviewed By: fmayer, vitalybuka

Pull Request: https://github.com/llvm/llvm-project/pull/153888
This commit is contained in:
Peter Collingbourne 2025-08-15 16:13:23 -07:00 committed by GitHub
parent be0135538a
commit 568c23bbd3
No known key found for this signature in database
GPG Key ID: B5690EEEBB952194
2 changed files with 15 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
clang/lib/Frontend/InitPreprocessor.cpp
View File

@ -1519,6 +1519,13 @@ static void InitializePredefinedMacros(const TargetInfo &TI,
if (TI.getTriple().isOSBinFormatELF())
Builder.defineMacro("__ELF__");
if (LangOpts.Sanitize.has(SanitizerKind::Address))
Builder.defineMacro("__SANITIZE_ADDRESS__");
if (LangOpts.Sanitize.has(SanitizerKind::HWAddress))
Builder.defineMacro("__SANITIZE_HWADDRESS__");
if (LangOpts.Sanitize.has(SanitizerKind::Thread))
Builder.defineMacro("__SANITIZE_THREAD__");
// Target OS macro definitions.
if (PPOpts.DefineTargetOSMacros) {
const llvm::Triple &Triple = TI.getTriple();

8
clang/test/Preprocessor/sanitizer-predefines.c Normal file
View File

@ -0,0 +1,8 @@
// RUN: %clang_cc1 -E -dM -triple aarch64-unknown-linux -fsanitize=address %s | FileCheck %s --check-prefix=ASAN
// ASAN: #define __SANITIZE_ADDRESS__ 1
// RUN: %clang_cc1 -E -dM -triple aarch64-unknown-linux -fsanitize=hwaddress %s | FileCheck %s --check-prefix=HWASAN
// HWASAN: #define __SANITIZE_HWADDRESS__ 1
// RUN: %clang_cc1 -E -dM -triple aarch64-unknown-linux -fsanitize=thread %s | FileCheck %s --check-prefix=TSAN
// TSAN: #define __SANITIZE_THREAD__ 1