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//===-- ObjectFileWasm.h ----------------------------------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#ifndef LLDB_SOURCE_PLUGINS_OBJECTFILE_WASM_OBJECTFILEWASM_H
#define LLDB_SOURCE_PLUGINS_OBJECTFILE_WASM_OBJECTFILEWASM_H
#include "lldb/Symbol/ObjectFile.h"
#include "lldb/Utility/ArchSpec.h"
namespace lldb_private {
namespace wasm {
/// Generic Wasm object file reader.
///
/// This class provides a generic wasm32 reader plugin implementing the
/// ObjectFile protocol.
class ObjectFileWasm : public ObjectFile {
public:
static void Initialize();
static void Terminate();
static ConstString GetPluginNameStatic();
static const char *GetPluginDescriptionStatic() {
return "WebAssembly object file reader.";
}
static ObjectFile *
CreateInstance(const lldb::ModuleSP &module_sp, lldb::DataBufferSP &data_sp,
lldb::offset_t data_offset, const FileSpec *file,
lldb::offset_t file_offset, lldb::offset_t length);
static ObjectFile *CreateMemoryInstance(const lldb::ModuleSP &module_sp,
lldb::DataBufferSP &data_sp,
const lldb::ProcessSP &process_sp,
lldb::addr_t header_addr);
static size_t GetModuleSpecifications(const FileSpec &file,
lldb::DataBufferSP &data_sp,
lldb::offset_t data_offset,
lldb::offset_t file_offset,
lldb::offset_t length,
ModuleSpecList &specs);
/// PluginInterface protocol.
/// \{
ConstString GetPluginName() override { return GetPluginNameStatic(); }
uint32_t GetPluginVersion() override { return 1; }
/// \}
/// LLVM RTTI support
/// \{
static char ID;
bool isA(const void *ClassID) const override {
return ClassID == &ID || ObjectFile::isA(ClassID);
}
static bool classof(const ObjectFile *obj) { return obj->isA(&ID); }
/// \}
/// ObjectFile Protocol.
/// \{
bool ParseHeader() override;
lldb::ByteOrder GetByteOrder() const override {
return m_arch.GetByteOrder();
}
bool IsExecutable() const override { return false; }
uint32_t GetAddressByteSize() const override {
return m_arch.GetAddressByteSize();
}
AddressClass GetAddressClass(lldb::addr_t file_addr) override {
return AddressClass::eInvalid;
}
Symtab *GetSymtab() override;
bool IsStripped() override { return !!GetExternalDebugInfoFileSpec(); }
void CreateSections(SectionList &unified_section_list) override;
void Dump(Stream *s) override;
ArchSpec GetArchitecture() override { return m_arch; }
UUID GetUUID() override { return m_uuid; }
uint32_t GetDependentModules(FileSpecList &files) override { return 0; }
Type CalculateType() override { return eTypeSharedLibrary; }
Strata CalculateStrata() override { return eStrataUser; }
bool SetLoadAddress(lldb_private::Target &target, lldb::addr_t value,
bool value_is_offset) override;
lldb_private::Address GetBaseAddress() override {
return IsInMemory() ? Address(m_memory_addr) : Address(0);
}
/// \}
/// A Wasm module that has external DWARF debug information should contain a
/// custom section named "external_debug_info", whose payload is an UTF-8
/// encoded string that points to a Wasm module that contains the debug
/// information for this module.
llvm::Optional<FileSpec> GetExternalDebugInfoFileSpec();
private:
ObjectFileWasm(const lldb::ModuleSP &module_sp, lldb::DataBufferSP &data_sp,
lldb::offset_t data_offset, const FileSpec *file,
lldb::offset_t offset, lldb::offset_t length);
ObjectFileWasm(const lldb::ModuleSP &module_sp,
lldb::DataBufferSP &header_data_sp,
const lldb::ProcessSP &process_sp, lldb::addr_t header_addr);
/// Wasm section decoding routines.
/// \{
bool DecodeNextSection(lldb::offset_t *offset_ptr);
bool DecodeSections();
/// \}
/// Read a range of bytes from the Wasm module.
DataExtractor ReadImageData(lldb::offset_t offset, uint32_t size);
typedef struct section_info {
lldb::offset_t offset;
uint32_t size;
uint32_t id;
ConstString name;
} section_info_t;
/// Wasm section header dump routines.
/// \{
void DumpSectionHeader(llvm::raw_ostream &ostream, const section_info_t &sh);
void DumpSectionHeaders(llvm::raw_ostream &ostream);
/// \}
std::vector<section_info_t> m_sect_infos;
ArchSpec m_arch;
UUID m_uuid;
};
} // namespace wasm
} // namespace lldb_private
#endif // LLDB_SOURCE_PLUGINS_OBJECTFILE_WASM_OBJECTFILEWASM_H
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