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