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| author | Naomi Musgrave <nmusgrave@google.com> | 2015-07-30 17:59:46 +0000 |
|---|---|---|
| committer | Naomi Musgrave <nmusgrave@google.com> | 2015-07-30 17:59:46 +0000 |
| commit | 21792b145d1399292bd4a6ea7a835449cfd4e627 (patch) | |
| tree | a9b0e25aba6bd477f60453a40180e09cd2731be5 /clang/lib/CodeGen | |
| parent | 46951b596870d0e8895c355a8ad3459c54e78fb2 (diff) | |
| download | bcm5719-llvm-21792b145d1399292bd4a6ea7a835449cfd4e627.tar.gz bcm5719-llvm-21792b145d1399292bd4a6ea7a835449cfd4e627.zip | |
repress tail call optimization when performing use-after-dtor sanitization
Reviewers: eugenis, kcc
Subscribers: cfe-commits
Differential Revision: http://reviews.llvm.org/D11613
llvm-svn: 243668
Diffstat (limited to 'clang/lib/CodeGen')
| -rw-r--r-- | clang/lib/CodeGen/CGClass.cpp | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/clang/lib/CodeGen/CGClass.cpp b/clang/lib/CodeGen/CGClass.cpp index ac96afe31b8..a078beb9da1 100644 --- a/clang/lib/CodeGen/CGClass.cpp +++ b/clang/lib/CodeGen/CGClass.cpp @@ -1369,6 +1369,8 @@ static bool CanSkipVTablePointerInitialization(ASTContext &Context, // Generates function call for handling object poisoning, passing in // references to 'this' and its size as arguments. +// Disables tail call elimination, to save emitted callback from +// being optimized away. static void EmitDtorSanitizerCallback(CodeGenFunction &CGF, const CXXDestructorDecl *Dtor) { const ASTRecordLayout &Layout = @@ -1383,6 +1385,8 @@ static void EmitDtorSanitizerCallback(CodeGenFunction &CGF, llvm::FunctionType::get(CGF.VoidTy, ArgTypes, false); llvm::Value *Fn = CGF.CGM.CreateRuntimeFunction(FnType, "__sanitizer_dtor_callback"); + + CGF.CurFn->addFnAttr("disable-tail-calls", "true"); CGF.EmitNounwindRuntimeCall(Fn, Args); } |
