a0ac3c2bf0
This commit changes the way we blacklist global variables in ASan. Now the global is excluded from instrumentation (either regular bounds checking, or initialization-order checking) if: 1) Global is explicitly blacklisted by its mangled name. This part is left unchanged. 2) SourceLocation of a global is in blacklisted source file. This changes the old behavior, where instead of looking at the SourceLocation of a variable we simply considered llvm::Module identifier. This was wrong, as identifier may not correspond to the file name, and we incorrectly disabled instrumentation for globals coming from #include'd files. 3) Global is blacklisted by type. Now we build the type of a global variable using Clang machinery (QualType::getAsString()), instead of llvm::StructType::getName(). After this commit, the active users of ASan blacklist files may have to revisit them (this is a backwards-incompatible change). llvm-svn: 220097
54 lines
1.6 KiB
C++
54 lines
1.6 KiB
C++
//===--- SanitizerMetadata.h - Metadata for sanitizers ----------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// Class which emits metadata consumed by sanitizer instrumentation passes.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_CLANG_LIB_CODEGEN_SANITIZERMETADATA_H
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#define LLVM_CLANG_LIB_CODEGEN_SANITIZERMETADATA_H
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#include "clang/Basic/LLVM.h"
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#include "clang/Basic/SourceLocation.h"
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#include "clang/AST/Type.h"
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namespace llvm {
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class GlobalVariable;
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class Instruction;
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class MDNode;
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}
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namespace clang {
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class VarDecl;
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namespace CodeGen {
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class CodeGenModule;
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class SanitizerMetadata {
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SanitizerMetadata(const SanitizerMetadata &) LLVM_DELETED_FUNCTION;
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void operator=(const SanitizerMetadata &) LLVM_DELETED_FUNCTION;
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CodeGenModule &CGM;
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public:
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SanitizerMetadata(CodeGenModule &CGM);
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void reportGlobalToASan(llvm::GlobalVariable *GV, const VarDecl &D,
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bool IsDynInit = false);
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void reportGlobalToASan(llvm::GlobalVariable *GV, SourceLocation Loc,
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StringRef Name, QualType Ty, bool IsDynInit = false,
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bool IsBlacklisted = false);
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void disableSanitizerForGlobal(llvm::GlobalVariable *GV);
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void disableSanitizerForInstruction(llvm::Instruction *I);
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private:
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llvm::MDNode *getLocationMetadata(SourceLocation Loc);
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};
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} // end namespace CodeGen
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} // end namespace clang
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#endif
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