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6ef51e8f14
We have llvm-readobj for dumping CodeView from object files, and llvm-pdbutil has always been more focused on PDB. However, llvm-pdbutil has a lot of useful options for summarizing debug information in aggregate and presenting high level statistical views. Furthermore, it's arguably better as a testing tool since we don't have to write tests to conform to a state-machine like structure where you match multiple lines in succession, each depending on a previous match. llvm-pdbutil dumps much more concisely, so it's possible to use single-line matches in many cases where as with readobj tests you have to use multi-line matches with an implicit state machine. Because of this, I'm adding object file support to llvm-pdbutil. In fact, this mirrors the cvdump tool from Microsoft, which also supports both object files and pdb files. In the future we could perhaps rename this tool llvm-cvutil. In the meantime, this allows us to deep dive into object files the same way we already can with PDB files. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@312358 91177308-0d34-0410-b5e6-96231b3b80d8
108 lines
3.9 KiB
C++
108 lines
3.9 KiB
C++
//===- StringsAndChecksums.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_STRINGSANDCHECKSUMS_H
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#define LLVM_DEBUGINFO_CODEVIEW_STRINGSANDCHECKSUMS_H
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#include "llvm/DebugInfo/CodeView/CodeView.h"
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#include "llvm/DebugInfo/CodeView/DebugChecksumsSubsection.h"
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#include "llvm/DebugInfo/CodeView/DebugStringTableSubsection.h"
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#include "llvm/DebugInfo/CodeView/DebugSubsectionRecord.h"
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#include <memory>
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namespace llvm {
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namespace codeview {
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class StringsAndChecksumsRef {
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public:
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// If no subsections are known about initially, we find as much as we can.
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StringsAndChecksumsRef();
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// If only a string table subsection is given, we find a checksums subsection.
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explicit StringsAndChecksumsRef(const DebugStringTableSubsectionRef &Strings);
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// If both subsections are given, we don't need to find anything.
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StringsAndChecksumsRef(const DebugStringTableSubsectionRef &Strings,
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const DebugChecksumsSubsectionRef &Checksums);
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void setStrings(const DebugStringTableSubsectionRef &Strings);
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void setChecksums(const DebugChecksumsSubsectionRef &CS);
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void reset();
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void resetStrings();
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void resetChecksums();
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template <typename T> void initialize(T &&FragmentRange) {
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for (const DebugSubsectionRecord &R : FragmentRange) {
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if (Strings && Checksums)
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return;
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if (R.kind() == DebugSubsectionKind::FileChecksums) {
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initializeChecksums(R);
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continue;
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}
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if (R.kind() == DebugSubsectionKind::StringTable && !Strings) {
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// While in practice we should never encounter a string table even
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// though the string table is already initialized, in theory it's
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// possible. PDBs are supposed to have one global string table and
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// then this subsection should not appear. Whereas object files are
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// supposed to have this subsection appear exactly once. However,
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// for testing purposes it's nice to be able to test this subsection
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// independently of one format or the other, so for some tests we
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// manually construct a PDB that contains this subsection in addition
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// to a global string table.
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initializeStrings(R);
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continue;
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}
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}
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}
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const DebugStringTableSubsectionRef &strings() const { return *Strings; }
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const DebugChecksumsSubsectionRef &checksums() const { return *Checksums; }
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bool hasStrings() const { return Strings != nullptr; }
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bool hasChecksums() const { return Checksums != nullptr; }
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private:
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void initializeStrings(const DebugSubsectionRecord &SR);
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void initializeChecksums(const DebugSubsectionRecord &FCR);
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std::shared_ptr<DebugStringTableSubsectionRef> OwnedStrings;
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std::shared_ptr<DebugChecksumsSubsectionRef> OwnedChecksums;
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const DebugStringTableSubsectionRef *Strings = nullptr;
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const DebugChecksumsSubsectionRef *Checksums = nullptr;
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};
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class StringsAndChecksums {
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public:
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using StringsPtr = std::shared_ptr<DebugStringTableSubsection>;
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using ChecksumsPtr = std::shared_ptr<DebugChecksumsSubsection>;
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// If no subsections are known about initially, we find as much as we can.
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StringsAndChecksums() = default;
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void setStrings(const StringsPtr &SP) { Strings = SP; }
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void setChecksums(const ChecksumsPtr &CP) { Checksums = CP; }
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const StringsPtr &strings() const { return Strings; }
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const ChecksumsPtr &checksums() const { return Checksums; }
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bool hasStrings() const { return Strings != nullptr; }
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bool hasChecksums() const { return Checksums != nullptr; }
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private:
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StringsPtr Strings;
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ChecksumsPtr Checksums;
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};
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} // end namespace codeview
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} // end namespace llvm
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#endif // LLVM_DEBUGINFO_CODEVIEW_STRINGSANDCHECKSUMS_H
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