forked from OSchip/llvm-project
98 lines
3.3 KiB
C++
98 lines
3.3 KiB
C++
//===- DebugCrossImpSubsection.cpp ----------------------------------------===//
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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/CodeView/DebugCrossImpSubsection.h"
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#include "llvm/ADT/ArrayRef.h"
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#include "llvm/DebugInfo/CodeView/CodeViewError.h"
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#include "llvm/DebugInfo/CodeView/DebugStringTableSubsection.h"
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#include "llvm/Support/BinaryStreamReader.h"
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#include "llvm/Support/BinaryStreamWriter.h"
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#include "llvm/Support/Endian.h"
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#include "llvm/Support/Error.h"
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#include <algorithm>
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#include <cstdint>
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#include <utility>
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#include <vector>
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using namespace llvm;
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using namespace llvm::codeview;
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Error VarStreamArrayExtractor<CrossModuleImportItem>::
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operator()(BinaryStreamRef Stream, uint32_t &Len,
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codeview::CrossModuleImportItem &Item) {
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BinaryStreamReader Reader(Stream);
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if (Reader.bytesRemaining() < sizeof(CrossModuleImport))
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return make_error<CodeViewError>(
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cv_error_code::insufficient_buffer,
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"Not enough bytes for a Cross Module Import Header!");
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if (auto EC = Reader.readObject(Item.Header))
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return EC;
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if (Reader.bytesRemaining() < Item.Header->Count * sizeof(uint32_t))
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return make_error<CodeViewError>(
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cv_error_code::insufficient_buffer,
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"Not enough to read specified number of Cross Module References!");
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if (auto EC = Reader.readArray(Item.Imports, Item.Header->Count))
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return EC;
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return Error::success();
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}
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Error DebugCrossModuleImportsSubsectionRef::initialize(
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BinaryStreamReader Reader) {
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return Reader.readArray(References, Reader.bytesRemaining());
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}
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Error DebugCrossModuleImportsSubsectionRef::initialize(BinaryStreamRef Stream) {
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BinaryStreamReader Reader(Stream);
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return initialize(Reader);
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}
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void DebugCrossModuleImportsSubsection::addImport(StringRef Module,
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uint32_t ImportId) {
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Strings.insert(Module);
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std::vector<support::ulittle32_t> Targets = {support::ulittle32_t(ImportId)};
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auto Result = Mappings.insert(std::make_pair(Module, Targets));
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if (!Result.second)
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Result.first->getValue().push_back(Targets[0]);
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}
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uint32_t DebugCrossModuleImportsSubsection::calculateSerializedSize() const {
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uint32_t Size = 0;
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for (const auto &Item : Mappings) {
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Size += sizeof(CrossModuleImport);
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Size += sizeof(support::ulittle32_t) * Item.second.size();
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}
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return Size;
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}
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Error DebugCrossModuleImportsSubsection::commit(
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BinaryStreamWriter &Writer) const {
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using T = decltype(&*Mappings.begin());
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std::vector<T> Ids;
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Ids.reserve(Mappings.size());
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for (const auto &M : Mappings)
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Ids.push_back(&M);
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llvm::sort(Ids, [this](const T &L1, const T &L2) {
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return Strings.getIdForString(L1->getKey()) <
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Strings.getIdForString(L2->getKey());
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});
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for (const auto &Item : Ids) {
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CrossModuleImport Imp;
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Imp.ModuleNameOffset = Strings.getIdForString(Item->getKey());
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Imp.Count = Item->getValue().size();
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if (auto EC = Writer.writeObject(Imp))
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return EC;
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if (auto EC = Writer.writeArray(makeArrayRef(Item->getValue())))
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return EC;
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}
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return Error::success();
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}
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