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Detect use-after-scope bugs with AddressSanitizer

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Enable use-after-scope checks by default when using AddressSanitizer.
They allow to detect incorrect use of stack objects after their scope
have already ended. The detection is based on LLVM lifetime intrinsics.

To facilitate the use of this functionality, the lifetime intrinsics are
now emitted regardless of optimization level if enabled sanitizer makes
use of them.
This commit is contained in:
Tomasz Miąsko
2020-01-27 00:00:00 +00:00
parent 1d5f6d41e1
commit 08a1c566a7
3 changed files with 31 additions and 5 deletions
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3
src/rustllvm/PassWrapper.cpp
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@@ -87,8 +87,9 @@ extern "C" LLVMPassRef LLVMRustFindAndCreatePass(const char *PassName) {
extern "C" LLVMPassRef LLVMRustCreateAddressSanitizerFunctionPass(bool Recover) {
const bool CompileKernel = false;
const bool UseAfterScope = true;
return wrap(createAddressSanitizerFunctionPass(CompileKernel, Recover));
return wrap(createAddressSanitizerFunctionPass(CompileKernel, Recover, UseAfterScope));
}
extern "C" LLVMPassRef LLVMRustCreateModuleAddressSanitizerPass(bool Recover) {