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128 lines
4.4 KiB
128 lines
4.4 KiB
//===- ModInfo.cpp - PDB module information -------------------------------===//
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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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#include "llvm/DebugInfo/PDB/Raw/ModInfo.h"
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#include "llvm/DebugInfo/CodeView/StreamReader.h"
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#include "llvm/DebugInfo/PDB/Raw/PDBFile.h"
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#include "llvm/Support/Endian.h"
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using namespace llvm;
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using namespace llvm::pdb;
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using namespace llvm::support;
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namespace {
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struct SCBytes {
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ulittle16_t Section;
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char Padding1[2];
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little32_t Offset;
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little32_t Size;
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ulittle32_t Characteristics;
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ulittle16_t ModuleIndex;
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char Padding2[2];
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ulittle32_t DataCrc;
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ulittle32_t RelocCrc;
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};
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// struct Flags {
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// uint16_t fWritten : 1; // True if ModInfo is dirty
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// uint16_t fECEnabled : 1; // Is EC symbolic info present? (What is EC?)
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// uint16_t unused : 6; // Reserved
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// uint16_t iTSM : 8; // Type Server Index for this module
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//};
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const uint16_t HasECFlagMask = 0x2;
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const uint16_t TypeServerIndexMask = 0xFF00;
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const uint16_t TypeServerIndexShift = 8;
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}
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struct ModInfo::FileLayout {
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ulittle32_t Mod; // Currently opened module. This field is a
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// pointer in the reference implementation, but
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// that won't work on 64-bit systems, and anyway
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// it doesn't make sense to read a pointer from a
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// file. For now it is unused, so just ignore it.
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SCBytes SC; // First section contribution of this module.
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ulittle16_t Flags; // See Flags definition.
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ulittle16_t ModDiStream; // Stream Number of module debug info
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ulittle32_t SymBytes; // Size of local symbol debug info in above stream
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ulittle32_t LineBytes; // Size of line number debug info in above stream
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ulittle32_t C13Bytes; // Size of C13 line number info in above stream
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ulittle16_t NumFiles; // Number of files contributing to this module
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char Padding1[2]; // Padding so the next field is 4-byte aligned.
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ulittle32_t FileNameOffs; // array of [0..NumFiles) DBI name buffer offsets.
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// This field is a pointer in the reference
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// implementation, but as with `Mod`, we ignore it
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// for now since it is unused.
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ulittle32_t SrcFileNameNI; // Name Index for src file name
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ulittle32_t PdbFilePathNI; // Name Index for path to compiler PDB
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// Null terminated Module name
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// Null terminated Obj File Name
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};
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ModInfo::ModInfo() : Layout(nullptr) {}
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ModInfo::ModInfo(const ModInfo &Info)
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: ModuleName(Info.ModuleName), ObjFileName(Info.ObjFileName),
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Layout(Info.Layout) {}
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ModInfo::~ModInfo() {}
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Error ModInfo::initialize(codeview::StreamRef Stream, ModInfo &Info) {
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codeview::StreamReader Reader(Stream);
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if (auto EC = Reader.readObject(Info.Layout))
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return EC;
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if (auto EC = Reader.readZeroString(Info.ModuleName))
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return EC;
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if (auto EC = Reader.readZeroString(Info.ObjFileName))
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return EC;
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return Error::success();
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}
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bool ModInfo::hasECInfo() const { return (Layout->Flags & HasECFlagMask) != 0; }
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uint16_t ModInfo::getTypeServerIndex() const {
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return (Layout->Flags & TypeServerIndexMask) >> TypeServerIndexShift;
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}
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uint16_t ModInfo::getModuleStreamIndex() const { return Layout->ModDiStream; }
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uint32_t ModInfo::getSymbolDebugInfoByteSize() const {
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return Layout->SymBytes;
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}
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uint32_t ModInfo::getLineInfoByteSize() const { return Layout->LineBytes; }
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uint32_t ModInfo::getC13LineInfoByteSize() const { return Layout->C13Bytes; }
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uint32_t ModInfo::getNumberOfFiles() const { return Layout->NumFiles; }
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uint32_t ModInfo::getSourceFileNameIndex() const {
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return Layout->SrcFileNameNI;
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}
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uint32_t ModInfo::getPdbFilePathNameIndex() const {
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return Layout->PdbFilePathNI;
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}
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StringRef ModInfo::getModuleName() const { return ModuleName; }
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StringRef ModInfo::getObjFileName() const { return ObjFileName; }
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uint32_t ModInfo::getRecordLength() const {
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uint32_t M = ModuleName.str().size() + 1;
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uint32_t O = ObjFileName.str().size() + 1;
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uint32_t Size = sizeof(FileLayout) + M + O;
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Size = llvm::alignTo(Size, 4);
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return Size;
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}
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