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d947f15959
This was reported by the ASAN bot, and it turned out to be a fairly fundamental problem with the design of VarStreamArray and the way it passes context information to the extractor. The fix was cumbersome, and I'm not entirely pleased with it, so I plan to revisit this design in the future when I'm not pressed to get the bots green again. For now, this fixes the issue by storing the context information by value instead of by reference, and introduces some impossibly-confusing template magic to make things "work". git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@301999 91177308-0d34-0410-b5e6-96231b3b80d8
92 lines
2.7 KiB
C++
92 lines
2.7 KiB
C++
//===- ModuleDebugFileChecksumFragment.h ------------------------*- 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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#ifndef LLVM_DEBUGINFO_CODEVIEW_MODULEDEBUGFILECHECKSUMFRAGMENT_H
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#define LLVM_DEBUGINFO_CODEVIEW_MODULEDEBUGFILECHECKSUMFRAGMENT_H
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#include "llvm/ADT/ArrayRef.h"
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#include "llvm/ADT/DenseMap.h"
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#include "llvm/DebugInfo/CodeView/ModuleDebugFragment.h"
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#include "llvm/Support/Allocator.h"
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#include "llvm/Support/BinaryStreamArray.h"
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#include "llvm/Support/BinaryStreamReader.h"
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#include "llvm/Support/Endian.h"
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namespace llvm {
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namespace codeview {
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struct FileChecksumEntry {
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uint32_t FileNameOffset; // Byte offset of filename in global stringtable.
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FileChecksumKind Kind; // The type of checksum.
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ArrayRef<uint8_t> Checksum; // The bytes of the checksum.
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};
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}
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}
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namespace llvm {
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template <> struct VarStreamArrayExtractor<codeview::FileChecksumEntry> {
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public:
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typedef void ContextType;
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static Error extract(BinaryStreamRef Stream, uint32_t &Len,
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codeview::FileChecksumEntry &Item);
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};
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}
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namespace llvm {
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namespace codeview {
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class ModuleDebugFileChecksumFragmentRef final : public ModuleDebugFragmentRef {
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typedef VarStreamArray<codeview::FileChecksumEntry> FileChecksumArray;
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typedef FileChecksumArray::Iterator Iterator;
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public:
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ModuleDebugFileChecksumFragmentRef()
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: ModuleDebugFragmentRef(ModuleDebugFragmentKind::FileChecksums) {}
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static bool classof(const ModuleDebugFragmentRef *S) {
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return S->kind() == ModuleDebugFragmentKind::FileChecksums;
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}
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Error initialize(BinaryStreamReader Reader);
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Iterator begin() { return Checksums.begin(); }
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Iterator end() { return Checksums.end(); }
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const FileChecksumArray &getArray() const { return Checksums; }
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private:
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FileChecksumArray Checksums;
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};
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class ModuleDebugFileChecksumFragment final : public ModuleDebugFragment {
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public:
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ModuleDebugFileChecksumFragment();
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static bool classof(const ModuleDebugFragment *S) {
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return S->kind() == ModuleDebugFragmentKind::FileChecksums;
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}
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void addChecksum(uint32_t StringTableOffset, FileChecksumKind Kind,
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ArrayRef<uint8_t> Bytes);
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uint32_t calculateSerializedLength() override;
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Error commit(BinaryStreamWriter &Writer) override;
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uint32_t mapChecksumOffset(uint32_t StringTableOffset) const;
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private:
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DenseMap<uint32_t, uint32_t> OffsetMap;
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uint32_t SerializedSize = 0;
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llvm::BumpPtrAllocator Storage;
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std::vector<FileChecksumEntry> Checksums;
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};
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}
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}
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#endif
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