mirror of
https://github.com/RPCS3/llvm.git
synced 2025-05-18 11:26:29 +00:00
16e473d50a
This allows us to use yaml2obj and obj2yaml to round-trip CodeView symbol and type information without having to manually specify the bytes of the section. This makes for much easier to maintain tests. See the tests under lld/COFF in this patch for example. Before they just said SectionData: <blob> whereas now we can use meaningful record descriptions. Note that it still supports the SectionData yaml field, which could be useful for initializing a section to invalid bytes for testing, for example. Differential Revision: https://reviews.llvm.org/D34127 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@305366 91177308-0d34-0410-b5e6-96231b3b80d8
84 lines
2.9 KiB
C++
84 lines
2.9 KiB
C++
//===- DebugSubsectionRecord.cpp -----------------------------*- C++-*-===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "llvm/DebugInfo/CodeView/DebugSubsectionRecord.h"
|
|
#include "llvm/DebugInfo/CodeView/DebugSubsection.h"
|
|
|
|
#include "llvm/Support/BinaryStreamReader.h"
|
|
|
|
using namespace llvm;
|
|
using namespace llvm::codeview;
|
|
|
|
DebugSubsectionRecord::DebugSubsectionRecord()
|
|
: Container(CodeViewContainer::ObjectFile),
|
|
Kind(DebugSubsectionKind::None) {}
|
|
|
|
DebugSubsectionRecord::DebugSubsectionRecord(DebugSubsectionKind Kind,
|
|
BinaryStreamRef Data,
|
|
CodeViewContainer Container)
|
|
: Container(Container), Kind(Kind), Data(Data) {}
|
|
|
|
Error DebugSubsectionRecord::initialize(BinaryStreamRef Stream,
|
|
DebugSubsectionRecord &Info,
|
|
CodeViewContainer Container) {
|
|
const DebugSubsectionHeader *Header;
|
|
BinaryStreamReader Reader(Stream);
|
|
if (auto EC = Reader.readObject(Header))
|
|
return EC;
|
|
|
|
DebugSubsectionKind Kind =
|
|
static_cast<DebugSubsectionKind>(uint32_t(Header->Kind));
|
|
if (auto EC = Reader.readStreamRef(Info.Data, Header->Length))
|
|
return EC;
|
|
Info.Container = Container;
|
|
Info.Kind = Kind;
|
|
return Error::success();
|
|
}
|
|
|
|
uint32_t DebugSubsectionRecord::getRecordLength() const {
|
|
return sizeof(DebugSubsectionHeader) + Data.getLength();
|
|
}
|
|
|
|
DebugSubsectionKind DebugSubsectionRecord::kind() const { return Kind; }
|
|
|
|
BinaryStreamRef DebugSubsectionRecord::getRecordData() const { return Data; }
|
|
|
|
DebugSubsectionRecordBuilder::DebugSubsectionRecordBuilder(
|
|
std::shared_ptr<DebugSubsection> Subsection, CodeViewContainer Container)
|
|
: Subsection(std::move(Subsection)), Container(Container) {}
|
|
|
|
uint32_t DebugSubsectionRecordBuilder::calculateSerializedLength() {
|
|
// The length of the entire subsection is always padded to 4 bytes, regardless
|
|
// of the container kind.
|
|
uint32_t Size = sizeof(DebugSubsectionHeader) +
|
|
alignTo(Subsection->calculateSerializedSize(), 4);
|
|
return Size;
|
|
}
|
|
|
|
Error DebugSubsectionRecordBuilder::commit(BinaryStreamWriter &Writer) const {
|
|
assert(Writer.getOffset() % alignOf(Container) == 0 &&
|
|
"Debug Subsection not properly aligned");
|
|
|
|
DebugSubsectionHeader Header;
|
|
Header.Kind = uint32_t(Subsection->kind());
|
|
// The value written into the Header's Length field is only padded to the
|
|
// container's alignment
|
|
Header.Length =
|
|
alignTo(Subsection->calculateSerializedSize(), alignOf(Container));
|
|
|
|
if (auto EC = Writer.writeObject(Header))
|
|
return EC;
|
|
if (auto EC = Subsection->commit(Writer))
|
|
return EC;
|
|
if (auto EC = Writer.padToAlignment(4))
|
|
return EC;
|
|
|
|
return Error::success();
|
|
}
|