0e5cdbf07e
This patch adds support for creating modules from JSON object files. This is necessary for the crashlog use case where we don't have either a module or a symbol file. In that case the ObjectFileJSON serves as both. The patch adds support for an object file type (i.e. executable, shared library, etc). It also adds the ability to specify sections, which is necessary in order specify symbols by address. Finally, this patch improves error handling and fixes a bug where we wouldn't read more than the initial 512 bytes in GetModuleSpecifications. Differential revision: https://reviews.llvm.org/D148062
126 lines
4.1 KiB
C++
126 lines
4.1 KiB
C++
//===-- ObjectFileJSON.h -------------------------------------- -*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLDB_SOURCE_PLUGINS_OBJECTFILE_JSON_OBJECTFILEJSON_H
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#define LLDB_SOURCE_PLUGINS_OBJECTFILE_JSON_OBJECTFILEJSON_H
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#include "lldb/Symbol/ObjectFile.h"
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#include "lldb/Utility/ArchSpec.h"
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#include "llvm/Support/JSON.h"
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namespace lldb_private {
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class ObjectFileJSON : public ObjectFile {
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public:
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static void Initialize();
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static void Terminate();
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static llvm::StringRef GetPluginNameStatic() { return "JSON"; }
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static const char *GetPluginDescriptionStatic() {
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return "JSON object file reader.";
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}
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static ObjectFile *
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CreateInstance(const lldb::ModuleSP &module_sp, lldb::DataBufferSP data_sp,
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lldb::offset_t data_offset, const FileSpec *file,
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lldb::offset_t file_offset, lldb::offset_t length);
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static ObjectFile *CreateMemoryInstance(const lldb::ModuleSP &module_sp,
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lldb::WritableDataBufferSP data_sp,
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const lldb::ProcessSP &process_sp,
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lldb::addr_t header_addr);
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static size_t GetModuleSpecifications(const FileSpec &file,
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lldb::DataBufferSP &data_sp,
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lldb::offset_t data_offset,
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lldb::offset_t file_offset,
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lldb::offset_t length,
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ModuleSpecList &specs);
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llvm::StringRef GetPluginName() override { return GetPluginNameStatic(); }
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// LLVM RTTI support
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static char ID;
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bool isA(const void *ClassID) const override {
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return ClassID == &ID || ObjectFile::isA(ClassID);
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}
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static bool classof(const ObjectFile *obj) { return obj->isA(&ID); }
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bool ParseHeader() override;
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lldb::ByteOrder GetByteOrder() const override {
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return m_arch.GetByteOrder();
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}
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bool IsExecutable() const override { return false; }
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uint32_t GetAddressByteSize() const override {
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return m_arch.GetAddressByteSize();
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}
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AddressClass GetAddressClass(lldb::addr_t file_addr) override {
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return AddressClass::eInvalid;
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}
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void ParseSymtab(lldb_private::Symtab &symtab) override;
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bool IsStripped() override { return false; }
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void CreateSections(SectionList &unified_section_list) override;
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void Dump(Stream *s) override {}
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ArchSpec GetArchitecture() override { return m_arch; }
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UUID GetUUID() override { return m_uuid; }
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uint32_t GetDependentModules(FileSpecList &files) override { return 0; }
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Type CalculateType() override { return m_type; }
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Strata CalculateStrata() override { return eStrataUser; }
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static bool MagicBytesMatch(lldb::DataBufferSP data_sp, lldb::addr_t offset,
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lldb::addr_t length);
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struct Header {
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std::string triple;
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std::string uuid;
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std::optional<ObjectFile::Type> type;
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};
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struct Body {
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std::vector<JSONSection> sections;
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std::vector<JSONSymbol> symbols;
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};
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private:
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ArchSpec m_arch;
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UUID m_uuid;
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ObjectFile::Type m_type;
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std::optional<uint64_t> m_size;
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std::vector<JSONSymbol> m_symbols;
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std::vector<JSONSection> m_sections;
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ObjectFileJSON(const lldb::ModuleSP &module_sp, lldb::DataBufferSP &data_sp,
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lldb::offset_t data_offset, const FileSpec *file,
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lldb::offset_t offset, lldb::offset_t length, ArchSpec arch,
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UUID uuid, Type type, std::vector<JSONSymbol> symbols,
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std::vector<JSONSection> sections);
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};
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bool fromJSON(const llvm::json::Value &value, ObjectFileJSON::Header &header,
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llvm::json::Path path);
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bool fromJSON(const llvm::json::Value &value, ObjectFileJSON::Body &body,
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llvm::json::Path path);
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} // namespace lldb_private
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#endif // LLDB_SOURCE_PLUGINS_OBJECTFILE_JSON_OBJECTFILEJSON_H
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