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//===- PrettyClassLayoutGraphicalDumper.h -----------------------*- 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 "PrettyClassLayoutGraphicalDumper.h"
#include "PrettyClassDefinitionDumper.h"
#include "PrettyEnumDumper.h"
#include "PrettyFunctionDumper.h"
#include "PrettyTypedefDumper.h"
#include "PrettyVariableDumper.h"
#include "PrettyVariableDumper.h"
#include "llvm-pdbutil.h"
#include "llvm/DebugInfo/PDB/IPDBLineNumber.h"
#include "llvm/DebugInfo/PDB/PDBSymbolData.h"
#include "llvm/DebugInfo/PDB/PDBSymbolTypeBaseClass.h"
#include "llvm/DebugInfo/PDB/PDBSymbolTypeFunctionSig.h"
#include "llvm/DebugInfo/PDB/PDBSymbolTypeUDT.h"
#include "llvm/DebugInfo/PDB/UDTLayout.h"
#include "llvm/Support/Format.h"
using namespace llvm;
using namespace llvm::pdb;
PrettyClassLayoutGraphicalDumper::PrettyClassLayoutGraphicalDumper(
LinePrinter &P, uint32_t RecurseLevel, uint32_t InitialOffset)
: PDBSymDumper(true), Printer(P), RecursionLevel(RecurseLevel),
ClassOffsetZero(InitialOffset), CurrentAbsoluteOffset(InitialOffset) {}
bool PrettyClassLayoutGraphicalDumper::start(const UDTLayoutBase &Layout) {
if (RecursionLevel == 1 &&
opts::pretty::ClassFormat == opts::pretty::ClassDefinitionFormat::All) {
for (const auto &Other : Layout.other_items())
Other->dump(*this);
for (const auto &Func : Layout.funcs())
Func->dump(*this);
}
const BitVector &UseMap = Layout.usedBytes();
int NextPaddingByte = UseMap.find_first_unset();
for (const auto &Item : Layout.layout_items()) {
// Calculate the absolute offset of the first byte of the next field.
uint32_t RelativeOffset = Item->getOffsetInParent();
CurrentAbsoluteOffset = ClassOffsetZero + RelativeOffset;
// This might be an empty base, in which case it could extend outside the
// bounds of the parent class.
if (RelativeOffset < UseMap.size() && (Item->getSize() > 0)) {
// If there is any remaining padding in this class, and the offset of the
// new item is after the padding, then we must have just jumped over some
// padding. Print a padding row and then look for where the next block
// of padding begins.
if ((NextPaddingByte >= 0) &&
(RelativeOffset > uint32_t(NextPaddingByte))) {
printPaddingRow(RelativeOffset - NextPaddingByte);
NextPaddingByte = UseMap.find_next_unset(RelativeOffset);
}
}
CurrentItem = Item;
if (Item->isVBPtr()) {
VTableLayoutItem &Layout = static_cast<VTableLayoutItem &>(*CurrentItem);
VariableDumper VarDumper(Printer);
VarDumper.startVbptr(CurrentAbsoluteOffset, Layout.getSize());
} else {
if (auto Sym = Item->getSymbol())
Sym->dump(*this);
}
if (Item->getLayoutSize() > 0) {
uint32_t Prev = RelativeOffset + Item->getLayoutSize() - 1;
if (Prev < UseMap.size())
NextPaddingByte = UseMap.find_next_unset(Prev);
}
}
auto TailPadding = Layout.tailPadding();
if (TailPadding > 0) {
if (TailPadding != 1 || Layout.getSize() != 1) {
Printer.NewLine();
WithColor(Printer, PDB_ColorItem::Padding).get()
<< "<padding> (" << TailPadding << " bytes)";
DumpedAnything = true;
}
}
return DumpedAnything;
}
void PrettyClassLayoutGraphicalDumper::printPaddingRow(uint32_t Amount) {
if (Amount == 0)
return;
Printer.NewLine();
WithColor(Printer, PDB_ColorItem::Padding).get() << "<padding> (" << Amount
<< " bytes)";
DumpedAnything = true;
}
void PrettyClassLayoutGraphicalDumper::dump(
const PDBSymbolTypeBaseClass &Symbol) {
assert(CurrentItem != nullptr);
Printer.NewLine();
BaseClassLayout &Layout = static_cast<BaseClassLayout &>(*CurrentItem);
std::string Label = "base";
if (Layout.isVirtualBase()) {
Label.insert(Label.begin(), 'v');
if (Layout.getBase().isIndirectVirtualBaseClass())
Label.insert(Label.begin(), 'i');
}
Printer << Label << " ";
uint32_t Size = Layout.isEmptyBase() ? 1 : Layout.getLayoutSize();
WithColor(Printer, PDB_ColorItem::Offset).get()
<< "+" << format_hex(CurrentAbsoluteOffset, 4) << " [sizeof=" << Size
<< "] ";
WithColor(Printer, PDB_ColorItem::Identifier).get() << Layout.getName();
if (shouldRecurse()) {
Printer.Indent();
uint32_t ChildOffsetZero = ClassOffsetZero + Layout.getOffsetInParent();
PrettyClassLayoutGraphicalDumper BaseDumper(Printer, RecursionLevel + 1,
ChildOffsetZero);
DumpedAnything |= BaseDumper.start(Layout);
Printer.Unindent();
}
DumpedAnything = true;
}
bool PrettyClassLayoutGraphicalDumper::shouldRecurse() const {
uint32_t Limit = opts::pretty::ClassRecursionDepth;
if (Limit == 0)
return true;
return RecursionLevel < Limit;
}
void PrettyClassLayoutGraphicalDumper::dump(const PDBSymbolData &Symbol) {
VariableDumper VarDumper(Printer);
VarDumper.start(Symbol, ClassOffsetZero);
if (CurrentItem != nullptr) {
DataMemberLayoutItem &Layout =
static_cast<DataMemberLayoutItem &>(*CurrentItem);
if (Layout.hasUDTLayout() && shouldRecurse()) {
uint32_t ChildOffsetZero = ClassOffsetZero + Layout.getOffsetInParent();
Printer.Indent();
PrettyClassLayoutGraphicalDumper TypeDumper(Printer, RecursionLevel + 1,
ChildOffsetZero);
TypeDumper.start(Layout.getUDTLayout());
Printer.Unindent();
}
}
DumpedAnything = true;
}
void PrettyClassLayoutGraphicalDumper::dump(const PDBSymbolTypeVTable &Symbol) {
assert(CurrentItem != nullptr);
VariableDumper VarDumper(Printer);
VarDumper.start(Symbol, ClassOffsetZero);
DumpedAnything = true;
}
void PrettyClassLayoutGraphicalDumper::dump(const PDBSymbolTypeEnum &Symbol) {
DumpedAnything = true;
Printer.NewLine();
EnumDumper Dumper(Printer);
Dumper.start(Symbol);
}
void PrettyClassLayoutGraphicalDumper::dump(
const PDBSymbolTypeTypedef &Symbol) {
DumpedAnything = true;
Printer.NewLine();
TypedefDumper Dumper(Printer);
Dumper.start(Symbol);
}
void PrettyClassLayoutGraphicalDumper::dump(
const PDBSymbolTypeBuiltin &Symbol) {}
void PrettyClassLayoutGraphicalDumper::dump(const PDBSymbolTypeUDT &Symbol) {}
void PrettyClassLayoutGraphicalDumper::dump(const PDBSymbolFunc &Symbol) {
if (Printer.IsSymbolExcluded(Symbol.getName()))
return;
if (Symbol.isCompilerGenerated() && opts::pretty::ExcludeCompilerGenerated)
return;
if (Symbol.getLength() == 0 && !Symbol.isPureVirtual() &&
!Symbol.isIntroVirtualFunction())
return;
DumpedAnything = true;
Printer.NewLine();
FunctionDumper Dumper(Printer);
Dumper.start(Symbol, FunctionDumper::PointerType::None);
}
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