SymbolRecordHelpers.cpp
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//===- SymbolRecordHelpers.cpp ----------------------------------*- 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
//
//===----------------------------------------------------------------------===//
#include "llvm/DebugInfo/CodeView/SymbolRecordHelpers.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/DebugInfo/CodeView/SymbolDeserializer.h"
using namespace llvm;
using namespace llvm::codeview;
template <typename RecordT> static RecordT createRecord(const CVSymbol &sym) {
RecordT record(static_cast<SymbolRecordKind>(sym.kind()));
cantFail(SymbolDeserializer::deserializeAs<RecordT>(sym, record));
return record;
}
uint32_t llvm::codeview::getScopeEndOffset(const CVSymbol &Sym) {
assert(symbolOpensScope(Sym.kind()));
switch (Sym.kind()) {
case SymbolKind::S_GPROC32:
case SymbolKind::S_LPROC32:
case SymbolKind::S_GPROC32_ID:
case SymbolKind::S_LPROC32_ID:
case SymbolKind::S_LPROC32_DPC:
case SymbolKind::S_LPROC32_DPC_ID: {
ProcSym Proc = createRecord<ProcSym>(Sym);
return Proc.End;
}
case SymbolKind::S_BLOCK32: {
BlockSym Block = createRecord<BlockSym>(Sym);
return Block.End;
}
case SymbolKind::S_THUNK32: {
Thunk32Sym Thunk = createRecord<Thunk32Sym>(Sym);
return Thunk.End;
}
case SymbolKind::S_INLINESITE: {
InlineSiteSym Site = createRecord<InlineSiteSym>(Sym);
return Site.End;
}
default:
assert(false && "Unknown record type");
return 0;
}
}
uint32_t
llvm::codeview::getScopeParentOffset(const llvm::codeview::CVSymbol &Sym) {
assert(symbolOpensScope(Sym.kind()));
switch (Sym.kind()) {
case SymbolKind::S_GPROC32:
case SymbolKind::S_LPROC32:
case SymbolKind::S_GPROC32_ID:
case SymbolKind::S_LPROC32_ID:
case SymbolKind::S_LPROC32_DPC:
case SymbolKind::S_LPROC32_DPC_ID: {
ProcSym Proc = createRecord<ProcSym>(Sym);
return Proc.Parent;
}
case SymbolKind::S_BLOCK32: {
BlockSym Block = createRecord<BlockSym>(Sym);
return Block.Parent;
}
case SymbolKind::S_THUNK32: {
Thunk32Sym Thunk = createRecord<Thunk32Sym>(Sym);
return Thunk.Parent;
}
case SymbolKind::S_INLINESITE: {
InlineSiteSym Site = createRecord<InlineSiteSym>(Sym);
return Site.Parent;
}
default:
assert(false && "Unknown record type");
return 0;
}
}
CVSymbolArray
llvm::codeview::limitSymbolArrayToScope(const CVSymbolArray &Symbols,
uint32_t ScopeBegin) {
CVSymbol Opener = *Symbols.at(ScopeBegin);
assert(symbolOpensScope(Opener.kind()));
uint32_t EndOffset = getScopeEndOffset(Opener);
CVSymbol Closer = *Symbols.at(EndOffset);
EndOffset += Closer.RecordData.size();
return Symbols.substream(ScopeBegin, EndOffset);
}