mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-17 03:30:28 +00:00
0582ae99ba
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@66867 91177308-0d34-0410-b5e6-96231b3b80d8
4550 lines
146 KiB
C++
4550 lines
146 KiB
C++
//===-- llvm/CodeGen/DwarfWriter.cpp - Dwarf Framework ----------*- C++ -*-===//
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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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//
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// This file contains support for writing dwarf info into asm files.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/CodeGen/DwarfWriter.h"
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#include "llvm/Module.h"
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#include "llvm/DerivedTypes.h"
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#include "llvm/Constants.h"
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#include "llvm/CodeGen/AsmPrinter.h"
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#include "llvm/CodeGen/MachineModuleInfo.h"
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#include "llvm/CodeGen/MachineFrameInfo.h"
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#include "llvm/CodeGen/MachineLocation.h"
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#include "llvm/Analysis/DebugInfo.h"
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#include "llvm/Support/Debug.h"
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#include "llvm/Support/Dwarf.h"
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#include "llvm/Support/CommandLine.h"
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#include "llvm/Support/DataTypes.h"
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#include "llvm/Support/Mangler.h"
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#include "llvm/Support/Timer.h"
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#include "llvm/Support/raw_ostream.h"
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#include "llvm/System/Path.h"
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#include "llvm/Target/TargetAsmInfo.h"
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#include "llvm/Target/TargetRegisterInfo.h"
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#include "llvm/Target/TargetData.h"
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#include "llvm/Target/TargetFrameInfo.h"
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#include "llvm/Target/TargetInstrInfo.h"
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#include "llvm/Target/TargetMachine.h"
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#include "llvm/Target/TargetOptions.h"
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#include "llvm/ADT/DenseMap.h"
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#include "llvm/ADT/FoldingSet.h"
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#include "llvm/ADT/StringExtras.h"
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#include "llvm/ADT/StringMap.h"
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#include <ostream>
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#include <string>
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using namespace llvm;
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using namespace llvm::dwarf;
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static RegisterPass<DwarfWriter>
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X("dwarfwriter", "DWARF Information Writer");
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char DwarfWriter::ID = 0;
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static TimerGroup &getDwarfTimerGroup() {
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static TimerGroup DwarfTimerGroup("Dwarf Exception and Debugging");
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return DwarfTimerGroup;
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}
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namespace llvm {
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//===----------------------------------------------------------------------===//
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/// Configuration values for initial hash set sizes (log2).
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///
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static const unsigned InitDiesSetSize = 9; // log2(512)
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static const unsigned InitAbbreviationsSetSize = 9; // log2(512)
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static const unsigned InitValuesSetSize = 9; // log2(512)
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//===----------------------------------------------------------------------===//
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/// Forward declarations.
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///
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class DIE;
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class DIEValue;
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//===----------------------------------------------------------------------===//
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/// Utility routines.
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///
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/// getGlobalVariable - Return either a direct or cast Global value.
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///
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static GlobalVariable *getGlobalVariable(Value *V) {
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if (GlobalVariable *GV = dyn_cast<GlobalVariable>(V)) {
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return GV;
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} else if (ConstantExpr *CE = dyn_cast<ConstantExpr>(V)) {
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if (CE->getOpcode() == Instruction::BitCast) {
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return dyn_cast<GlobalVariable>(CE->getOperand(0));
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} else if (CE->getOpcode() == Instruction::GetElementPtr) {
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for (unsigned int i=1; i<CE->getNumOperands(); i++) {
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if (!CE->getOperand(i)->isNullValue())
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return NULL;
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}
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return dyn_cast<GlobalVariable>(CE->getOperand(0));
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}
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}
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return NULL;
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}
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//===----------------------------------------------------------------------===//
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/// DWLabel - Labels are used to track locations in the assembler file.
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/// Labels appear in the form @verbatim <prefix><Tag><Number> @endverbatim,
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/// where the tag is a category of label (Ex. location) and number is a value
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/// unique in that category.
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class DWLabel {
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public:
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/// Tag - Label category tag. Should always be a staticly declared C string.
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///
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const char *Tag;
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/// Number - Value to make label unique.
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///
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unsigned Number;
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DWLabel(const char *T, unsigned N) : Tag(T), Number(N) {}
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void Profile(FoldingSetNodeID &ID) const {
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ID.AddString(Tag);
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ID.AddInteger(Number);
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}
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#ifndef NDEBUG
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void print(std::ostream *O) const {
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if (O) print(*O);
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}
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void print(std::ostream &O) const {
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O << "." << Tag;
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if (Number) O << Number;
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}
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#endif
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};
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//===----------------------------------------------------------------------===//
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/// DIEAbbrevData - Dwarf abbreviation data, describes the one attribute of a
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/// Dwarf abbreviation.
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class DIEAbbrevData {
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/// Attribute - Dwarf attribute code.
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///
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unsigned Attribute;
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/// Form - Dwarf form code.
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///
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unsigned Form;
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public:
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DIEAbbrevData(unsigned A, unsigned F) : Attribute(A), Form(F) {}
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// Accessors.
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unsigned getAttribute() const { return Attribute; }
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unsigned getForm() const { return Form; }
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/// Profile - Used to gather unique data for the abbreviation folding set.
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///
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void Profile(FoldingSetNodeID &ID)const {
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ID.AddInteger(Attribute);
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ID.AddInteger(Form);
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}
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};
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//===----------------------------------------------------------------------===//
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/// DIEAbbrev - Dwarf abbreviation, describes the organization of a debug
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/// information object.
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class DIEAbbrev : public FoldingSetNode {
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private:
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/// Tag - Dwarf tag code.
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///
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unsigned Tag;
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/// Unique number for node.
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///
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unsigned Number;
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/// ChildrenFlag - Dwarf children flag.
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///
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unsigned ChildrenFlag;
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/// Data - Raw data bytes for abbreviation.
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///
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SmallVector<DIEAbbrevData, 8> Data;
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public:
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DIEAbbrev(unsigned T, unsigned C) : Tag(T), ChildrenFlag(C), Data() {}
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virtual ~DIEAbbrev() {}
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// Accessors.
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unsigned getTag() const { return Tag; }
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unsigned getNumber() const { return Number; }
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unsigned getChildrenFlag() const { return ChildrenFlag; }
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const SmallVector<DIEAbbrevData, 8> &getData() const { return Data; }
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void setTag(unsigned T) { Tag = T; }
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void setChildrenFlag(unsigned CF) { ChildrenFlag = CF; }
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void setNumber(unsigned N) { Number = N; }
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/// AddAttribute - Adds another set of attribute information to the
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/// abbreviation.
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void AddAttribute(unsigned Attribute, unsigned Form) {
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Data.push_back(DIEAbbrevData(Attribute, Form));
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}
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/// AddFirstAttribute - Adds a set of attribute information to the front
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/// of the abbreviation.
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void AddFirstAttribute(unsigned Attribute, unsigned Form) {
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Data.insert(Data.begin(), DIEAbbrevData(Attribute, Form));
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}
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/// Profile - Used to gather unique data for the abbreviation folding set.
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///
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void Profile(FoldingSetNodeID &ID) {
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ID.AddInteger(Tag);
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ID.AddInteger(ChildrenFlag);
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// For each attribute description.
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for (unsigned i = 0, N = Data.size(); i < N; ++i)
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Data[i].Profile(ID);
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}
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/// Emit - Print the abbreviation using the specified Dwarf writer.
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///
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void Emit(const DwarfDebug &DD) const;
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#ifndef NDEBUG
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void print(std::ostream *O) {
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if (O) print(*O);
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}
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void print(std::ostream &O);
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void dump();
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#endif
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};
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//===----------------------------------------------------------------------===//
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/// DIE - A structured debug information entry. Has an abbreviation which
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/// describes it's organization.
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class DIE : public FoldingSetNode {
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protected:
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/// Abbrev - Buffer for constructing abbreviation.
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///
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DIEAbbrev Abbrev;
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/// Offset - Offset in debug info section.
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///
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unsigned Offset;
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/// Size - Size of instance + children.
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///
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unsigned Size;
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/// Children DIEs.
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///
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std::vector<DIE *> Children;
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/// Attributes values.
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///
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SmallVector<DIEValue*, 32> Values;
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public:
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explicit DIE(unsigned Tag)
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: Abbrev(Tag, DW_CHILDREN_no), Offset(0), Size(0), Children(), Values() {}
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virtual ~DIE();
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// Accessors.
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DIEAbbrev &getAbbrev() { return Abbrev; }
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unsigned getAbbrevNumber() const {
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return Abbrev.getNumber();
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}
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unsigned getTag() const { return Abbrev.getTag(); }
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unsigned getOffset() const { return Offset; }
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unsigned getSize() const { return Size; }
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const std::vector<DIE *> &getChildren() const { return Children; }
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SmallVector<DIEValue*, 32> &getValues() { return Values; }
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void setTag(unsigned Tag) { Abbrev.setTag(Tag); }
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void setOffset(unsigned O) { Offset = O; }
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void setSize(unsigned S) { Size = S; }
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/// AddValue - Add a value and attributes to a DIE.
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///
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void AddValue(unsigned Attribute, unsigned Form, DIEValue *Value) {
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Abbrev.AddAttribute(Attribute, Form);
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Values.push_back(Value);
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}
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/// SiblingOffset - Return the offset of the debug information entry's
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/// sibling.
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unsigned SiblingOffset() const { return Offset + Size; }
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/// AddSiblingOffset - Add a sibling offset field to the front of the DIE.
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///
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void AddSiblingOffset();
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/// AddChild - Add a child to the DIE.
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///
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void AddChild(DIE *Child) {
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Abbrev.setChildrenFlag(DW_CHILDREN_yes);
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Children.push_back(Child);
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}
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/// Detach - Detaches objects connected to it after copying.
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///
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void Detach() {
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Children.clear();
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}
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/// Profile - Used to gather unique data for the value folding set.
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///
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void Profile(FoldingSetNodeID &ID) ;
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#ifndef NDEBUG
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void print(std::ostream *O, unsigned IncIndent = 0) {
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if (O) print(*O, IncIndent);
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}
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void print(std::ostream &O, unsigned IncIndent = 0);
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void dump();
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#endif
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};
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//===----------------------------------------------------------------------===//
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/// DIEValue - A debug information entry value.
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///
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class DIEValue : public FoldingSetNode {
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public:
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enum {
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isInteger,
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isString,
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isLabel,
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isAsIsLabel,
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isSectionOffset,
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isDelta,
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isEntry,
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isBlock
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};
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/// Type - Type of data stored in the value.
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///
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unsigned Type;
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explicit DIEValue(unsigned T) : Type(T) {}
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virtual ~DIEValue() {}
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// Accessors
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unsigned getType() const { return Type; }
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// Implement isa/cast/dyncast.
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static bool classof(const DIEValue *) { return true; }
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/// EmitValue - Emit value via the Dwarf writer.
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///
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virtual void EmitValue(DwarfDebug &DD, unsigned Form) = 0;
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/// SizeOf - Return the size of a value in bytes.
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///
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virtual unsigned SizeOf(const DwarfDebug &DD, unsigned Form) const = 0;
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/// Profile - Used to gather unique data for the value folding set.
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///
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virtual void Profile(FoldingSetNodeID &ID) = 0;
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#ifndef NDEBUG
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void print(std::ostream *O) {
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if (O) print(*O);
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}
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virtual void print(std::ostream &O) = 0;
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void dump();
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#endif
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};
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//===----------------------------------------------------------------------===//
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/// DWInteger - An integer value DIE.
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///
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class DIEInteger : public DIEValue {
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private:
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uint64_t Integer;
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public:
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explicit DIEInteger(uint64_t I) : DIEValue(isInteger), Integer(I) {}
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// Implement isa/cast/dyncast.
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static bool classof(const DIEInteger *) { return true; }
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static bool classof(const DIEValue *I) { return I->Type == isInteger; }
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/// BestForm - Choose the best form for integer.
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///
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static unsigned BestForm(bool IsSigned, uint64_t Integer) {
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if (IsSigned) {
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if ((char)Integer == (signed)Integer) return DW_FORM_data1;
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if ((short)Integer == (signed)Integer) return DW_FORM_data2;
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if ((int)Integer == (signed)Integer) return DW_FORM_data4;
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} else {
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if ((unsigned char)Integer == Integer) return DW_FORM_data1;
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if ((unsigned short)Integer == Integer) return DW_FORM_data2;
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if ((unsigned int)Integer == Integer) return DW_FORM_data4;
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}
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return DW_FORM_data8;
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}
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/// EmitValue - Emit integer of appropriate size.
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///
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virtual void EmitValue(DwarfDebug &DD, unsigned Form);
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/// SizeOf - Determine size of integer value in bytes.
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///
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virtual unsigned SizeOf(const DwarfDebug &DD, unsigned Form) const;
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/// Profile - Used to gather unique data for the value folding set.
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///
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static void Profile(FoldingSetNodeID &ID, unsigned Integer) {
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ID.AddInteger(isInteger);
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ID.AddInteger(Integer);
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}
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virtual void Profile(FoldingSetNodeID &ID) { Profile(ID, Integer); }
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#ifndef NDEBUG
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virtual void print(std::ostream &O) {
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O << "Int: " << (int64_t)Integer
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<< " 0x" << std::hex << Integer << std::dec;
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}
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#endif
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};
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//===----------------------------------------------------------------------===//
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/// DIEString - A string value DIE.
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///
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class DIEString : public DIEValue {
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const std::string Str;
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public:
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explicit DIEString(const std::string &S) : DIEValue(isString), Str(S) {}
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// Implement isa/cast/dyncast.
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static bool classof(const DIEString *) { return true; }
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static bool classof(const DIEValue *S) { return S->Type == isString; }
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/// EmitValue - Emit string value.
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///
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virtual void EmitValue(DwarfDebug &DD, unsigned Form);
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/// SizeOf - Determine size of string value in bytes.
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///
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virtual unsigned SizeOf(const DwarfDebug &DD, unsigned Form) const {
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return Str.size() + sizeof(char); // sizeof('\0');
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}
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/// Profile - Used to gather unique data for the value folding set.
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///
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static void Profile(FoldingSetNodeID &ID, const std::string &Str) {
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ID.AddInteger(isString);
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ID.AddString(Str);
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}
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virtual void Profile(FoldingSetNodeID &ID) { Profile(ID, Str); }
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#ifndef NDEBUG
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virtual void print(std::ostream &O) {
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O << "Str: \"" << Str << "\"";
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}
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#endif
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};
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//===----------------------------------------------------------------------===//
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/// DIEDwarfLabel - A Dwarf internal label expression DIE.
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//
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class DIEDwarfLabel : public DIEValue {
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const DWLabel Label;
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public:
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explicit DIEDwarfLabel(const DWLabel &L) : DIEValue(isLabel), Label(L) {}
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// Implement isa/cast/dyncast.
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static bool classof(const DIEDwarfLabel *) { return true; }
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static bool classof(const DIEValue *L) { return L->Type == isLabel; }
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/// EmitValue - Emit label value.
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///
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virtual void EmitValue(DwarfDebug &DD, unsigned Form);
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/// SizeOf - Determine size of label value in bytes.
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///
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virtual unsigned SizeOf(const DwarfDebug &DD, unsigned Form) const;
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/// Profile - Used to gather unique data for the value folding set.
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///
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static void Profile(FoldingSetNodeID &ID, const DWLabel &Label) {
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ID.AddInteger(isLabel);
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Label.Profile(ID);
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}
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virtual void Profile(FoldingSetNodeID &ID) { Profile(ID, Label); }
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#ifndef NDEBUG
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virtual void print(std::ostream &O) {
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O << "Lbl: ";
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Label.print(O);
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}
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#endif
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};
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//===----------------------------------------------------------------------===//
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/// DIEObjectLabel - A label to an object in code or data.
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//
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class DIEObjectLabel : public DIEValue {
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const std::string Label;
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public:
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explicit DIEObjectLabel(const std::string &L)
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: DIEValue(isAsIsLabel), Label(L) {}
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// Implement isa/cast/dyncast.
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static bool classof(const DIEObjectLabel *) { return true; }
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static bool classof(const DIEValue *L) { return L->Type == isAsIsLabel; }
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/// EmitValue - Emit label value.
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///
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virtual void EmitValue(DwarfDebug &DD, unsigned Form);
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/// SizeOf - Determine size of label value in bytes.
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///
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virtual unsigned SizeOf(const DwarfDebug &DD, unsigned Form) const;
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/// Profile - Used to gather unique data for the value folding set.
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///
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static void Profile(FoldingSetNodeID &ID, const std::string &Label) {
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ID.AddInteger(isAsIsLabel);
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ID.AddString(Label);
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}
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virtual void Profile(FoldingSetNodeID &ID) { Profile(ID, Label.c_str()); }
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#ifndef NDEBUG
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virtual void print(std::ostream &O) {
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O << "Obj: " << Label;
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}
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#endif
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};
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|
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//===----------------------------------------------------------------------===//
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/// DIESectionOffset - A section offset DIE.
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//
|
|
class DIESectionOffset : public DIEValue {
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const DWLabel Label;
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const DWLabel Section;
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bool IsEH : 1;
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|
bool UseSet : 1;
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|
public:
|
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DIESectionOffset(const DWLabel &Lab, const DWLabel &Sec,
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bool isEH = false, bool useSet = true)
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: DIEValue(isSectionOffset), Label(Lab), Section(Sec),
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IsEH(isEH), UseSet(useSet) {}
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|
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// Implement isa/cast/dyncast.
|
|
static bool classof(const DIESectionOffset *) { return true; }
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static bool classof(const DIEValue *D) { return D->Type == isSectionOffset; }
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|
|
/// EmitValue - Emit section offset.
|
|
///
|
|
virtual void EmitValue(DwarfDebug &DD, unsigned Form);
|
|
|
|
/// SizeOf - Determine size of section offset value in bytes.
|
|
///
|
|
virtual unsigned SizeOf(const DwarfDebug &DD, unsigned Form) const;
|
|
|
|
/// Profile - Used to gather unique data for the value folding set.
|
|
///
|
|
static void Profile(FoldingSetNodeID &ID, const DWLabel &Label,
|
|
const DWLabel &Section) {
|
|
ID.AddInteger(isSectionOffset);
|
|
Label.Profile(ID);
|
|
Section.Profile(ID);
|
|
// IsEH and UseSet are specific to the Label/Section that we will emit
|
|
// the offset for; so Label/Section are enough for uniqueness.
|
|
}
|
|
virtual void Profile(FoldingSetNodeID &ID) { Profile(ID, Label, Section); }
|
|
|
|
#ifndef NDEBUG
|
|
virtual void print(std::ostream &O) {
|
|
O << "Off: ";
|
|
Label.print(O);
|
|
O << "-";
|
|
Section.print(O);
|
|
O << "-" << IsEH << "-" << UseSet;
|
|
}
|
|
#endif
|
|
};
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
/// DIEDelta - A simple label difference DIE.
|
|
///
|
|
class DIEDelta : public DIEValue {
|
|
const DWLabel LabelHi;
|
|
const DWLabel LabelLo;
|
|
public:
|
|
DIEDelta(const DWLabel &Hi, const DWLabel &Lo)
|
|
: DIEValue(isDelta), LabelHi(Hi), LabelLo(Lo) {}
|
|
|
|
// Implement isa/cast/dyncast.
|
|
static bool classof(const DIEDelta *) { return true; }
|
|
static bool classof(const DIEValue *D) { return D->Type == isDelta; }
|
|
|
|
/// EmitValue - Emit delta value.
|
|
///
|
|
virtual void EmitValue(DwarfDebug &DD, unsigned Form);
|
|
|
|
/// SizeOf - Determine size of delta value in bytes.
|
|
///
|
|
virtual unsigned SizeOf(const DwarfDebug &DD, unsigned Form) const;
|
|
|
|
/// Profile - Used to gather unique data for the value folding set.
|
|
///
|
|
static void Profile(FoldingSetNodeID &ID, const DWLabel &LabelHi,
|
|
const DWLabel &LabelLo) {
|
|
ID.AddInteger(isDelta);
|
|
LabelHi.Profile(ID);
|
|
LabelLo.Profile(ID);
|
|
}
|
|
virtual void Profile(FoldingSetNodeID &ID) { Profile(ID, LabelHi, LabelLo); }
|
|
|
|
#ifndef NDEBUG
|
|
virtual void print(std::ostream &O) {
|
|
O << "Del: ";
|
|
LabelHi.print(O);
|
|
O << "-";
|
|
LabelLo.print(O);
|
|
}
|
|
#endif
|
|
};
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
/// DIEntry - A pointer to another debug information entry. An instance of this
|
|
/// class can also be used as a proxy for a debug information entry not yet
|
|
/// defined (ie. types.)
|
|
class DIEntry : public DIEValue {
|
|
DIE *Entry;
|
|
public:
|
|
explicit DIEntry(DIE *E) : DIEValue(isEntry), Entry(E) {}
|
|
|
|
void setEntry(DIE *E) { Entry = E; }
|
|
|
|
// Implement isa/cast/dyncast.
|
|
static bool classof(const DIEntry *) { return true; }
|
|
static bool classof(const DIEValue *E) { return E->Type == isEntry; }
|
|
|
|
/// EmitValue - Emit debug information entry offset.
|
|
///
|
|
virtual void EmitValue(DwarfDebug &DD, unsigned Form);
|
|
|
|
/// SizeOf - Determine size of debug information entry in bytes.
|
|
///
|
|
virtual unsigned SizeOf(const DwarfDebug &DD, unsigned Form) const {
|
|
return sizeof(int32_t);
|
|
}
|
|
|
|
/// Profile - Used to gather unique data for the value folding set.
|
|
///
|
|
static void Profile(FoldingSetNodeID &ID, DIE *Entry) {
|
|
ID.AddInteger(isEntry);
|
|
ID.AddPointer(Entry);
|
|
}
|
|
virtual void Profile(FoldingSetNodeID &ID) {
|
|
ID.AddInteger(isEntry);
|
|
|
|
if (Entry) {
|
|
ID.AddPointer(Entry);
|
|
} else {
|
|
ID.AddPointer(this);
|
|
}
|
|
}
|
|
|
|
#ifndef NDEBUG
|
|
virtual void print(std::ostream &O) {
|
|
O << "Die: 0x" << std::hex << (intptr_t)Entry << std::dec;
|
|
}
|
|
#endif
|
|
};
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
/// DIEBlock - A block of values. Primarily used for location expressions.
|
|
//
|
|
class DIEBlock : public DIEValue, public DIE {
|
|
unsigned Size; // Size in bytes excluding size header.
|
|
public:
|
|
DIEBlock()
|
|
: DIEValue(isBlock), DIE(0), Size(0) {}
|
|
virtual ~DIEBlock() {}
|
|
|
|
// Implement isa/cast/dyncast.
|
|
static bool classof(const DIEBlock *) { return true; }
|
|
static bool classof(const DIEValue *E) { return E->Type == isBlock; }
|
|
|
|
/// ComputeSize - calculate the size of the block.
|
|
///
|
|
unsigned ComputeSize(DwarfDebug &DD);
|
|
|
|
/// BestForm - Choose the best form for data.
|
|
///
|
|
unsigned BestForm() const {
|
|
if ((unsigned char)Size == Size) return DW_FORM_block1;
|
|
if ((unsigned short)Size == Size) return DW_FORM_block2;
|
|
if ((unsigned int)Size == Size) return DW_FORM_block4;
|
|
return DW_FORM_block;
|
|
}
|
|
|
|
/// EmitValue - Emit block data.
|
|
///
|
|
virtual void EmitValue(DwarfDebug &DD, unsigned Form);
|
|
|
|
/// SizeOf - Determine size of block data in bytes.
|
|
///
|
|
virtual unsigned SizeOf(const DwarfDebug &DD, unsigned Form) const;
|
|
|
|
/// Profile - Used to gather unique data for the value folding set.
|
|
///
|
|
virtual void Profile(FoldingSetNodeID &ID) {
|
|
ID.AddInteger(isBlock);
|
|
DIE::Profile(ID);
|
|
}
|
|
|
|
#ifndef NDEBUG
|
|
virtual void print(std::ostream &O) {
|
|
O << "Blk: ";
|
|
DIE::print(O, 5);
|
|
}
|
|
#endif
|
|
};
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
/// CompileUnit - This dwarf writer support class manages information associate
|
|
/// with a source file.
|
|
class CompileUnit {
|
|
/// ID - File identifier for source.
|
|
///
|
|
unsigned ID;
|
|
|
|
/// Die - Compile unit debug information entry.
|
|
///
|
|
DIE *Die;
|
|
|
|
/// GVToDieMap - Tracks the mapping of unit level debug informaton
|
|
/// variables to debug information entries.
|
|
std::map<GlobalVariable *, DIE *> GVToDieMap;
|
|
|
|
/// GVToDIEntryMap - Tracks the mapping of unit level debug informaton
|
|
/// descriptors to debug information entries using a DIEntry proxy.
|
|
std::map<GlobalVariable *, DIEntry *> GVToDIEntryMap;
|
|
|
|
/// Globals - A map of globally visible named entities for this unit.
|
|
///
|
|
std::map<std::string, DIE *> Globals;
|
|
|
|
/// DiesSet - Used to uniquely define dies within the compile unit.
|
|
///
|
|
FoldingSet<DIE> DiesSet;
|
|
public:
|
|
CompileUnit(unsigned I, DIE *D)
|
|
: ID(I), Die(D), GVToDieMap(),
|
|
GVToDIEntryMap(), Globals(), DiesSet(InitDiesSetSize)
|
|
{}
|
|
|
|
~CompileUnit() {
|
|
delete Die;
|
|
}
|
|
|
|
// Accessors.
|
|
unsigned getID() const { return ID; }
|
|
DIE* getDie() const { return Die; }
|
|
std::map<std::string, DIE *> &getGlobals() { return Globals; }
|
|
|
|
/// hasContent - Return true if this compile unit has something to write out.
|
|
///
|
|
bool hasContent() const {
|
|
return !Die->getChildren().empty();
|
|
}
|
|
|
|
/// AddGlobal - Add a new global entity to the compile unit.
|
|
///
|
|
void AddGlobal(const std::string &Name, DIE *Die) {
|
|
Globals[Name] = Die;
|
|
}
|
|
|
|
/// getDieMapSlotFor - Returns the debug information entry map slot for the
|
|
/// specified debug variable.
|
|
DIE *&getDieMapSlotFor(GlobalVariable *GV) {
|
|
return GVToDieMap[GV];
|
|
}
|
|
|
|
/// getDIEntrySlotFor - Returns the debug information entry proxy slot for the
|
|
/// specified debug variable.
|
|
DIEntry *&getDIEntrySlotFor(GlobalVariable *GV) {
|
|
return GVToDIEntryMap[GV];
|
|
}
|
|
|
|
/// AddDie - Adds or interns the DIE to the compile unit.
|
|
///
|
|
DIE *AddDie(DIE &Buffer) {
|
|
FoldingSetNodeID ID;
|
|
Buffer.Profile(ID);
|
|
void *Where;
|
|
DIE *Die = DiesSet.FindNodeOrInsertPos(ID, Where);
|
|
|
|
if (!Die) {
|
|
Die = new DIE(Buffer);
|
|
DiesSet.InsertNode(Die, Where);
|
|
this->Die->AddChild(Die);
|
|
Buffer.Detach();
|
|
}
|
|
|
|
return Die;
|
|
}
|
|
};
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
/// Dwarf - Emits general Dwarf directives.
|
|
///
|
|
class Dwarf {
|
|
protected:
|
|
//===--------------------------------------------------------------------===//
|
|
// Core attributes used by the Dwarf writer.
|
|
//
|
|
|
|
//
|
|
/// O - Stream to .s file.
|
|
///
|
|
raw_ostream &O;
|
|
|
|
/// Asm - Target of Dwarf emission.
|
|
///
|
|
AsmPrinter *Asm;
|
|
|
|
/// TAI - Target asm information.
|
|
const TargetAsmInfo *TAI;
|
|
|
|
/// TD - Target data.
|
|
const TargetData *TD;
|
|
|
|
/// RI - Register Information.
|
|
const TargetRegisterInfo *RI;
|
|
|
|
/// M - Current module.
|
|
///
|
|
Module *M;
|
|
|
|
/// MF - Current machine function.
|
|
///
|
|
MachineFunction *MF;
|
|
|
|
/// MMI - Collected machine module information.
|
|
///
|
|
MachineModuleInfo *MMI;
|
|
|
|
/// SubprogramCount - The running count of functions being compiled.
|
|
///
|
|
unsigned SubprogramCount;
|
|
|
|
/// Flavor - A unique string indicating what dwarf producer this is, used to
|
|
/// unique labels.
|
|
const char * const Flavor;
|
|
|
|
unsigned SetCounter;
|
|
Dwarf(raw_ostream &OS, AsmPrinter *A, const TargetAsmInfo *T,
|
|
const char *flavor)
|
|
: O(OS)
|
|
, Asm(A)
|
|
, TAI(T)
|
|
, TD(Asm->TM.getTargetData())
|
|
, RI(Asm->TM.getRegisterInfo())
|
|
, M(NULL)
|
|
, MF(NULL)
|
|
, MMI(NULL)
|
|
, SubprogramCount(0)
|
|
, Flavor(flavor)
|
|
, SetCounter(1)
|
|
{
|
|
}
|
|
|
|
public:
|
|
//===--------------------------------------------------------------------===//
|
|
// Accessors.
|
|
//
|
|
AsmPrinter *getAsm() const { return Asm; }
|
|
MachineModuleInfo *getMMI() const { return MMI; }
|
|
const TargetAsmInfo *getTargetAsmInfo() const { return TAI; }
|
|
const TargetData *getTargetData() const { return TD; }
|
|
|
|
void PrintRelDirective(bool Force32Bit = false, bool isInSection = false)
|
|
const {
|
|
if (isInSection && TAI->getDwarfSectionOffsetDirective())
|
|
O << TAI->getDwarfSectionOffsetDirective();
|
|
else if (Force32Bit || TD->getPointerSize() == sizeof(int32_t))
|
|
O << TAI->getData32bitsDirective();
|
|
else
|
|
O << TAI->getData64bitsDirective();
|
|
}
|
|
|
|
/// PrintLabelName - Print label name in form used by Dwarf writer.
|
|
///
|
|
void PrintLabelName(DWLabel Label) const {
|
|
PrintLabelName(Label.Tag, Label.Number);
|
|
}
|
|
void PrintLabelName(const char *Tag, unsigned Number) const {
|
|
O << TAI->getPrivateGlobalPrefix() << Tag;
|
|
if (Number) O << Number;
|
|
}
|
|
|
|
void PrintLabelName(const char *Tag, unsigned Number,
|
|
const char *Suffix) const {
|
|
O << TAI->getPrivateGlobalPrefix() << Tag;
|
|
if (Number) O << Number;
|
|
O << Suffix;
|
|
}
|
|
|
|
/// EmitLabel - Emit location label for internal use by Dwarf.
|
|
///
|
|
void EmitLabel(DWLabel Label) const {
|
|
EmitLabel(Label.Tag, Label.Number);
|
|
}
|
|
void EmitLabel(const char *Tag, unsigned Number) const {
|
|
PrintLabelName(Tag, Number);
|
|
O << ":\n";
|
|
}
|
|
|
|
/// EmitReference - Emit a reference to a label.
|
|
///
|
|
void EmitReference(DWLabel Label, bool IsPCRelative = false,
|
|
bool Force32Bit = false) const {
|
|
EmitReference(Label.Tag, Label.Number, IsPCRelative, Force32Bit);
|
|
}
|
|
void EmitReference(const char *Tag, unsigned Number,
|
|
bool IsPCRelative = false, bool Force32Bit = false) const {
|
|
PrintRelDirective(Force32Bit);
|
|
PrintLabelName(Tag, Number);
|
|
|
|
if (IsPCRelative) O << "-" << TAI->getPCSymbol();
|
|
}
|
|
void EmitReference(const std::string &Name, bool IsPCRelative = false,
|
|
bool Force32Bit = false) const {
|
|
PrintRelDirective(Force32Bit);
|
|
|
|
O << Name;
|
|
|
|
if (IsPCRelative) O << "-" << TAI->getPCSymbol();
|
|
}
|
|
|
|
/// EmitDifference - Emit the difference between two labels. Some
|
|
/// assemblers do not behave with absolute expressions with data directives,
|
|
/// so there is an option (needsSet) to use an intermediary set expression.
|
|
void EmitDifference(DWLabel LabelHi, DWLabel LabelLo,
|
|
bool IsSmall = false) {
|
|
EmitDifference(LabelHi.Tag, LabelHi.Number,
|
|
LabelLo.Tag, LabelLo.Number,
|
|
IsSmall);
|
|
}
|
|
void EmitDifference(const char *TagHi, unsigned NumberHi,
|
|
const char *TagLo, unsigned NumberLo,
|
|
bool IsSmall = false) {
|
|
if (TAI->needsSet()) {
|
|
O << "\t.set\t";
|
|
PrintLabelName("set", SetCounter, Flavor);
|
|
O << ",";
|
|
PrintLabelName(TagHi, NumberHi);
|
|
O << "-";
|
|
PrintLabelName(TagLo, NumberLo);
|
|
O << "\n";
|
|
|
|
PrintRelDirective(IsSmall);
|
|
PrintLabelName("set", SetCounter, Flavor);
|
|
++SetCounter;
|
|
} else {
|
|
PrintRelDirective(IsSmall);
|
|
|
|
PrintLabelName(TagHi, NumberHi);
|
|
O << "-";
|
|
PrintLabelName(TagLo, NumberLo);
|
|
}
|
|
}
|
|
|
|
void EmitSectionOffset(const char* Label, const char* Section,
|
|
unsigned LabelNumber, unsigned SectionNumber,
|
|
bool IsSmall = false, bool isEH = false,
|
|
bool useSet = true) {
|
|
bool printAbsolute = false;
|
|
if (isEH)
|
|
printAbsolute = TAI->isAbsoluteEHSectionOffsets();
|
|
else
|
|
printAbsolute = TAI->isAbsoluteDebugSectionOffsets();
|
|
|
|
if (TAI->needsSet() && useSet) {
|
|
O << "\t.set\t";
|
|
PrintLabelName("set", SetCounter, Flavor);
|
|
O << ",";
|
|
PrintLabelName(Label, LabelNumber);
|
|
|
|
if (!printAbsolute) {
|
|
O << "-";
|
|
PrintLabelName(Section, SectionNumber);
|
|
}
|
|
O << "\n";
|
|
|
|
PrintRelDirective(IsSmall);
|
|
|
|
PrintLabelName("set", SetCounter, Flavor);
|
|
++SetCounter;
|
|
} else {
|
|
PrintRelDirective(IsSmall, true);
|
|
|
|
PrintLabelName(Label, LabelNumber);
|
|
|
|
if (!printAbsolute) {
|
|
O << "-";
|
|
PrintLabelName(Section, SectionNumber);
|
|
}
|
|
}
|
|
}
|
|
|
|
/// EmitFrameMoves - Emit frame instructions to describe the layout of the
|
|
/// frame.
|
|
void EmitFrameMoves(const char *BaseLabel, unsigned BaseLabelID,
|
|
const std::vector<MachineMove> &Moves, bool isEH) {
|
|
int stackGrowth =
|
|
Asm->TM.getFrameInfo()->getStackGrowthDirection() ==
|
|
TargetFrameInfo::StackGrowsUp ?
|
|
TD->getPointerSize() : -TD->getPointerSize();
|
|
bool IsLocal = BaseLabel && strcmp(BaseLabel, "label") == 0;
|
|
|
|
for (unsigned i = 0, N = Moves.size(); i < N; ++i) {
|
|
const MachineMove &Move = Moves[i];
|
|
unsigned LabelID = Move.getLabelID();
|
|
|
|
if (LabelID) {
|
|
LabelID = MMI->MappedLabel(LabelID);
|
|
|
|
// Throw out move if the label is invalid.
|
|
if (!LabelID) continue;
|
|
}
|
|
|
|
const MachineLocation &Dst = Move.getDestination();
|
|
const MachineLocation &Src = Move.getSource();
|
|
|
|
// Advance row if new location.
|
|
if (BaseLabel && LabelID && (BaseLabelID != LabelID || !IsLocal)) {
|
|
Asm->EmitInt8(DW_CFA_advance_loc4);
|
|
Asm->EOL("DW_CFA_advance_loc4");
|
|
EmitDifference("label", LabelID, BaseLabel, BaseLabelID, true);
|
|
Asm->EOL();
|
|
|
|
BaseLabelID = LabelID;
|
|
BaseLabel = "label";
|
|
IsLocal = true;
|
|
}
|
|
|
|
// If advancing cfa.
|
|
if (Dst.isReg() && Dst.getReg() == MachineLocation::VirtualFP) {
|
|
if (!Src.isReg()) {
|
|
if (Src.getReg() == MachineLocation::VirtualFP) {
|
|
Asm->EmitInt8(DW_CFA_def_cfa_offset);
|
|
Asm->EOL("DW_CFA_def_cfa_offset");
|
|
} else {
|
|
Asm->EmitInt8(DW_CFA_def_cfa);
|
|
Asm->EOL("DW_CFA_def_cfa");
|
|
Asm->EmitULEB128Bytes(RI->getDwarfRegNum(Src.getReg(), isEH));
|
|
Asm->EOL("Register");
|
|
}
|
|
|
|
int Offset = -Src.getOffset();
|
|
|
|
Asm->EmitULEB128Bytes(Offset);
|
|
Asm->EOL("Offset");
|
|
} else {
|
|
assert(0 && "Machine move no supported yet.");
|
|
}
|
|
} else if (Src.isReg() &&
|
|
Src.getReg() == MachineLocation::VirtualFP) {
|
|
if (Dst.isReg()) {
|
|
Asm->EmitInt8(DW_CFA_def_cfa_register);
|
|
Asm->EOL("DW_CFA_def_cfa_register");
|
|
Asm->EmitULEB128Bytes(RI->getDwarfRegNum(Dst.getReg(), isEH));
|
|
Asm->EOL("Register");
|
|
} else {
|
|
assert(0 && "Machine move no supported yet.");
|
|
}
|
|
} else {
|
|
unsigned Reg = RI->getDwarfRegNum(Src.getReg(), isEH);
|
|
int Offset = Dst.getOffset() / stackGrowth;
|
|
|
|
if (Offset < 0) {
|
|
Asm->EmitInt8(DW_CFA_offset_extended_sf);
|
|
Asm->EOL("DW_CFA_offset_extended_sf");
|
|
Asm->EmitULEB128Bytes(Reg);
|
|
Asm->EOL("Reg");
|
|
Asm->EmitSLEB128Bytes(Offset);
|
|
Asm->EOL("Offset");
|
|
} else if (Reg < 64) {
|
|
Asm->EmitInt8(DW_CFA_offset + Reg);
|
|
if (VerboseAsm)
|
|
Asm->EOL("DW_CFA_offset + Reg (" + utostr(Reg) + ")");
|
|
else
|
|
Asm->EOL();
|
|
Asm->EmitULEB128Bytes(Offset);
|
|
Asm->EOL("Offset");
|
|
} else {
|
|
Asm->EmitInt8(DW_CFA_offset_extended);
|
|
Asm->EOL("DW_CFA_offset_extended");
|
|
Asm->EmitULEB128Bytes(Reg);
|
|
Asm->EOL("Reg");
|
|
Asm->EmitULEB128Bytes(Offset);
|
|
Asm->EOL("Offset");
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
};
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
/// SrcLineInfo - This class is used to record source line correspondence.
|
|
///
|
|
class SrcLineInfo {
|
|
unsigned Line; // Source line number.
|
|
unsigned Column; // Source column.
|
|
unsigned SourceID; // Source ID number.
|
|
unsigned LabelID; // Label in code ID number.
|
|
public:
|
|
SrcLineInfo(unsigned L, unsigned C, unsigned S, unsigned I)
|
|
: Line(L), Column(C), SourceID(S), LabelID(I) {}
|
|
|
|
// Accessors
|
|
unsigned getLine() const { return Line; }
|
|
unsigned getColumn() const { return Column; }
|
|
unsigned getSourceID() const { return SourceID; }
|
|
unsigned getLabelID() const { return LabelID; }
|
|
};
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
/// DbgVariable - This class is used to track local variable information.
|
|
///
|
|
class DbgVariable {
|
|
DIVariable Var; // Variable Descriptor.
|
|
unsigned FrameIndex; // Variable frame index.
|
|
public:
|
|
DbgVariable(DIVariable V, unsigned I) : Var(V), FrameIndex(I) {}
|
|
|
|
// Accessors.
|
|
DIVariable getVariable() const { return Var; }
|
|
unsigned getFrameIndex() const { return FrameIndex; }
|
|
};
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
/// DbgScope - This class is used to track scope information.
|
|
///
|
|
class DbgScope {
|
|
DbgScope *Parent; // Parent to this scope.
|
|
DIDescriptor Desc; // Debug info descriptor for scope.
|
|
// Either subprogram or block.
|
|
unsigned StartLabelID; // Label ID of the beginning of scope.
|
|
unsigned EndLabelID; // Label ID of the end of scope.
|
|
SmallVector<DbgScope *, 4> Scopes; // Scopes defined in scope.
|
|
SmallVector<DbgVariable *, 8> Variables;// Variables declared in scope.
|
|
public:
|
|
DbgScope(DbgScope *P, DIDescriptor D)
|
|
: Parent(P), Desc(D), StartLabelID(0), EndLabelID(0), Scopes(), Variables()
|
|
{}
|
|
~DbgScope() {
|
|
for (unsigned i = 0, N = Scopes.size(); i < N; ++i) delete Scopes[i];
|
|
for (unsigned j = 0, M = Variables.size(); j < M; ++j) delete Variables[j];
|
|
}
|
|
|
|
// Accessors.
|
|
DbgScope *getParent() const { return Parent; }
|
|
DIDescriptor getDesc() const { return Desc; }
|
|
unsigned getStartLabelID() const { return StartLabelID; }
|
|
unsigned getEndLabelID() const { return EndLabelID; }
|
|
SmallVector<DbgScope *, 4> &getScopes() { return Scopes; }
|
|
SmallVector<DbgVariable *, 8> &getVariables() { return Variables; }
|
|
void setStartLabelID(unsigned S) { StartLabelID = S; }
|
|
void setEndLabelID(unsigned E) { EndLabelID = E; }
|
|
|
|
/// AddScope - Add a scope to the scope.
|
|
///
|
|
void AddScope(DbgScope *S) { Scopes.push_back(S); }
|
|
|
|
/// AddVariable - Add a variable to the scope.
|
|
///
|
|
void AddVariable(DbgVariable *V) { Variables.push_back(V); }
|
|
};
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
/// DwarfDebug - Emits Dwarf debug directives.
|
|
///
|
|
class DwarfDebug : public Dwarf {
|
|
//===--------------------------------------------------------------------===//
|
|
// Attributes used to construct specific Dwarf sections.
|
|
//
|
|
|
|
/// CompileUnitMap - A map of global variables representing compile units to
|
|
/// compile units.
|
|
DenseMap<Value *, CompileUnit *> CompileUnitMap;
|
|
|
|
/// CompileUnits - All the compile units in this module.
|
|
///
|
|
SmallVector<CompileUnit *, 8> CompileUnits;
|
|
|
|
/// MainCU - Some platform prefers one compile unit per .o file. In such
|
|
/// cases, all dies are inserted in MainCU.
|
|
CompileUnit *MainCU;
|
|
|
|
/// AbbreviationsSet - Used to uniquely define abbreviations.
|
|
///
|
|
FoldingSet<DIEAbbrev> AbbreviationsSet;
|
|
|
|
/// Abbreviations - A list of all the unique abbreviations in use.
|
|
///
|
|
std::vector<DIEAbbrev *> Abbreviations;
|
|
|
|
/// DirectoryIdMap - Directory name to directory id map.
|
|
///
|
|
StringMap<unsigned> DirectoryIdMap;
|
|
|
|
/// DirectoryNames - A list of directory names.
|
|
SmallVector<std::string, 8> DirectoryNames;
|
|
|
|
/// SourceFileIdMap - Source file name to source file id map.
|
|
///
|
|
StringMap<unsigned> SourceFileIdMap;
|
|
|
|
/// SourceFileNames - A list of source file names.
|
|
SmallVector<std::string, 8> SourceFileNames;
|
|
|
|
/// SourceIdMap - Source id map, i.e. pair of directory id and source file
|
|
/// id mapped to a unique id.
|
|
DenseMap<std::pair<unsigned, unsigned>, unsigned> SourceIdMap;
|
|
|
|
/// SourceIds - Reverse map from source id to directory id + file id pair.
|
|
///
|
|
SmallVector<std::pair<unsigned, unsigned>, 8> SourceIds;
|
|
|
|
/// Lines - List of of source line correspondence.
|
|
std::vector<SrcLineInfo> Lines;
|
|
|
|
/// ValuesSet - Used to uniquely define values.
|
|
///
|
|
FoldingSet<DIEValue> ValuesSet;
|
|
|
|
/// Values - A list of all the unique values in use.
|
|
///
|
|
std::vector<DIEValue *> Values;
|
|
|
|
/// StringPool - A UniqueVector of strings used by indirect references.
|
|
///
|
|
UniqueVector<std::string> StringPool;
|
|
|
|
/// SectionMap - Provides a unique id per text section.
|
|
///
|
|
UniqueVector<const Section*> SectionMap;
|
|
|
|
/// SectionSourceLines - Tracks line numbers per text section.
|
|
///
|
|
std::vector<std::vector<SrcLineInfo> > SectionSourceLines;
|
|
|
|
/// didInitial - Flag to indicate if initial emission has been done.
|
|
///
|
|
bool didInitial;
|
|
|
|
/// shouldEmit - Flag to indicate if debug information should be emitted.
|
|
///
|
|
bool shouldEmit;
|
|
|
|
// RootDbgScope - Top level scope for the current function.
|
|
//
|
|
DbgScope *RootDbgScope;
|
|
|
|
/// DbgScopeMap - Tracks the scopes in the current function.
|
|
DenseMap<GlobalVariable *, DbgScope *> DbgScopeMap;
|
|
|
|
/// DebugTimer - Timer for the Dwarf debug writer.
|
|
Timer *DebugTimer;
|
|
|
|
struct FunctionDebugFrameInfo {
|
|
unsigned Number;
|
|
std::vector<MachineMove> Moves;
|
|
|
|
FunctionDebugFrameInfo(unsigned Num, const std::vector<MachineMove> &M):
|
|
Number(Num), Moves(M) { }
|
|
};
|
|
|
|
std::vector<FunctionDebugFrameInfo> DebugFrames;
|
|
|
|
private:
|
|
/// getSourceDirectoryAndFileIds - Return the directory and file ids that
|
|
/// maps to the source id. Source id starts at 1.
|
|
std::pair<unsigned, unsigned>
|
|
getSourceDirectoryAndFileIds(unsigned SId) const {
|
|
return SourceIds[SId-1];
|
|
}
|
|
|
|
/// getNumSourceDirectories - Return the number of source directories in the
|
|
/// debug info.
|
|
unsigned getNumSourceDirectories() const {
|
|
return DirectoryNames.size();
|
|
}
|
|
|
|
/// getSourceDirectoryName - Return the name of the directory corresponding
|
|
/// to the id.
|
|
const std::string &getSourceDirectoryName(unsigned Id) const {
|
|
return DirectoryNames[Id - 1];
|
|
}
|
|
|
|
/// getSourceFileName - Return the name of the source file corresponding
|
|
/// to the id.
|
|
const std::string &getSourceFileName(unsigned Id) const {
|
|
return SourceFileNames[Id - 1];
|
|
}
|
|
|
|
/// getNumSourceIds - Return the number of unique source ids.
|
|
unsigned getNumSourceIds() const {
|
|
return SourceIds.size();
|
|
}
|
|
|
|
/// AssignAbbrevNumber - Define a unique number for the abbreviation.
|
|
///
|
|
void AssignAbbrevNumber(DIEAbbrev &Abbrev) {
|
|
// Profile the node so that we can make it unique.
|
|
FoldingSetNodeID ID;
|
|
Abbrev.Profile(ID);
|
|
|
|
// Check the set for priors.
|
|
DIEAbbrev *InSet = AbbreviationsSet.GetOrInsertNode(&Abbrev);
|
|
|
|
// If it's newly added.
|
|
if (InSet == &Abbrev) {
|
|
// Add to abbreviation list.
|
|
Abbreviations.push_back(&Abbrev);
|
|
// Assign the vector position + 1 as its number.
|
|
Abbrev.setNumber(Abbreviations.size());
|
|
} else {
|
|
// Assign existing abbreviation number.
|
|
Abbrev.setNumber(InSet->getNumber());
|
|
}
|
|
}
|
|
|
|
/// NewString - Add a string to the constant pool and returns a label.
|
|
///
|
|
DWLabel NewString(const std::string &String) {
|
|
unsigned StringID = StringPool.insert(String);
|
|
return DWLabel("string", StringID);
|
|
}
|
|
|
|
/// NewDIEntry - Creates a new DIEntry to be a proxy for a debug information
|
|
/// entry.
|
|
DIEntry *NewDIEntry(DIE *Entry = NULL) {
|
|
DIEntry *Value;
|
|
|
|
if (Entry) {
|
|
FoldingSetNodeID ID;
|
|
DIEntry::Profile(ID, Entry);
|
|
void *Where;
|
|
Value = static_cast<DIEntry *>(ValuesSet.FindNodeOrInsertPos(ID, Where));
|
|
|
|
if (Value) return Value;
|
|
|
|
Value = new DIEntry(Entry);
|
|
ValuesSet.InsertNode(Value, Where);
|
|
} else {
|
|
Value = new DIEntry(Entry);
|
|
}
|
|
|
|
Values.push_back(Value);
|
|
return Value;
|
|
}
|
|
|
|
/// SetDIEntry - Set a DIEntry once the debug information entry is defined.
|
|
///
|
|
void SetDIEntry(DIEntry *Value, DIE *Entry) {
|
|
Value->setEntry(Entry);
|
|
// Add to values set if not already there. If it is, we merely have a
|
|
// duplicate in the values list (no harm.)
|
|
ValuesSet.GetOrInsertNode(Value);
|
|
}
|
|
|
|
/// AddUInt - Add an unsigned integer attribute data and value.
|
|
///
|
|
void AddUInt(DIE *Die, unsigned Attribute, unsigned Form, uint64_t Integer) {
|
|
if (!Form) Form = DIEInteger::BestForm(false, Integer);
|
|
|
|
FoldingSetNodeID ID;
|
|
DIEInteger::Profile(ID, Integer);
|
|
void *Where;
|
|
DIEValue *Value = ValuesSet.FindNodeOrInsertPos(ID, Where);
|
|
if (!Value) {
|
|
Value = new DIEInteger(Integer);
|
|
ValuesSet.InsertNode(Value, Where);
|
|
Values.push_back(Value);
|
|
}
|
|
|
|
Die->AddValue(Attribute, Form, Value);
|
|
}
|
|
|
|
/// AddSInt - Add an signed integer attribute data and value.
|
|
///
|
|
void AddSInt(DIE *Die, unsigned Attribute, unsigned Form, int64_t Integer) {
|
|
if (!Form) Form = DIEInteger::BestForm(true, Integer);
|
|
|
|
FoldingSetNodeID ID;
|
|
DIEInteger::Profile(ID, (uint64_t)Integer);
|
|
void *Where;
|
|
DIEValue *Value = ValuesSet.FindNodeOrInsertPos(ID, Where);
|
|
if (!Value) {
|
|
Value = new DIEInteger(Integer);
|
|
ValuesSet.InsertNode(Value, Where);
|
|
Values.push_back(Value);
|
|
}
|
|
|
|
Die->AddValue(Attribute, Form, Value);
|
|
}
|
|
|
|
/// AddString - Add a string attribute data and value.
|
|
///
|
|
void AddString(DIE *Die, unsigned Attribute, unsigned Form,
|
|
const std::string &String) {
|
|
FoldingSetNodeID ID;
|
|
DIEString::Profile(ID, String);
|
|
void *Where;
|
|
DIEValue *Value = ValuesSet.FindNodeOrInsertPos(ID, Where);
|
|
if (!Value) {
|
|
Value = new DIEString(String);
|
|
ValuesSet.InsertNode(Value, Where);
|
|
Values.push_back(Value);
|
|
}
|
|
|
|
Die->AddValue(Attribute, Form, Value);
|
|
}
|
|
|
|
/// AddLabel - Add a Dwarf label attribute data and value.
|
|
///
|
|
void AddLabel(DIE *Die, unsigned Attribute, unsigned Form,
|
|
const DWLabel &Label) {
|
|
FoldingSetNodeID ID;
|
|
DIEDwarfLabel::Profile(ID, Label);
|
|
void *Where;
|
|
DIEValue *Value = ValuesSet.FindNodeOrInsertPos(ID, Where);
|
|
if (!Value) {
|
|
Value = new DIEDwarfLabel(Label);
|
|
ValuesSet.InsertNode(Value, Where);
|
|
Values.push_back(Value);
|
|
}
|
|
|
|
Die->AddValue(Attribute, Form, Value);
|
|
}
|
|
|
|
/// AddObjectLabel - Add an non-Dwarf label attribute data and value.
|
|
///
|
|
void AddObjectLabel(DIE *Die, unsigned Attribute, unsigned Form,
|
|
const std::string &Label) {
|
|
FoldingSetNodeID ID;
|
|
DIEObjectLabel::Profile(ID, Label);
|
|
void *Where;
|
|
DIEValue *Value = ValuesSet.FindNodeOrInsertPos(ID, Where);
|
|
if (!Value) {
|
|
Value = new DIEObjectLabel(Label);
|
|
ValuesSet.InsertNode(Value, Where);
|
|
Values.push_back(Value);
|
|
}
|
|
|
|
Die->AddValue(Attribute, Form, Value);
|
|
}
|
|
|
|
/// AddSectionOffset - Add a section offset label attribute data and value.
|
|
///
|
|
void AddSectionOffset(DIE *Die, unsigned Attribute, unsigned Form,
|
|
const DWLabel &Label, const DWLabel &Section,
|
|
bool isEH = false, bool useSet = true) {
|
|
FoldingSetNodeID ID;
|
|
DIESectionOffset::Profile(ID, Label, Section);
|
|
void *Where;
|
|
DIEValue *Value = ValuesSet.FindNodeOrInsertPos(ID, Where);
|
|
if (!Value) {
|
|
Value = new DIESectionOffset(Label, Section, isEH, useSet);
|
|
ValuesSet.InsertNode(Value, Where);
|
|
Values.push_back(Value);
|
|
}
|
|
|
|
Die->AddValue(Attribute, Form, Value);
|
|
}
|
|
|
|
/// AddDelta - Add a label delta attribute data and value.
|
|
///
|
|
void AddDelta(DIE *Die, unsigned Attribute, unsigned Form,
|
|
const DWLabel &Hi, const DWLabel &Lo) {
|
|
FoldingSetNodeID ID;
|
|
DIEDelta::Profile(ID, Hi, Lo);
|
|
void *Where;
|
|
DIEValue *Value = ValuesSet.FindNodeOrInsertPos(ID, Where);
|
|
if (!Value) {
|
|
Value = new DIEDelta(Hi, Lo);
|
|
ValuesSet.InsertNode(Value, Where);
|
|
Values.push_back(Value);
|
|
}
|
|
|
|
Die->AddValue(Attribute, Form, Value);
|
|
}
|
|
|
|
/// AddDIEntry - Add a DIE attribute data and value.
|
|
///
|
|
void AddDIEntry(DIE *Die, unsigned Attribute, unsigned Form, DIE *Entry) {
|
|
Die->AddValue(Attribute, Form, NewDIEntry(Entry));
|
|
}
|
|
|
|
/// AddBlock - Add block data.
|
|
///
|
|
void AddBlock(DIE *Die, unsigned Attribute, unsigned Form, DIEBlock *Block) {
|
|
Block->ComputeSize(*this);
|
|
FoldingSetNodeID ID;
|
|
Block->Profile(ID);
|
|
void *Where;
|
|
DIEValue *Value = ValuesSet.FindNodeOrInsertPos(ID, Where);
|
|
if (!Value) {
|
|
Value = Block;
|
|
ValuesSet.InsertNode(Value, Where);
|
|
Values.push_back(Value);
|
|
} else {
|
|
// Already exists, reuse the previous one.
|
|
delete Block;
|
|
Block = cast<DIEBlock>(Value);
|
|
}
|
|
|
|
Die->AddValue(Attribute, Block->BestForm(), Value);
|
|
}
|
|
|
|
/// AddSourceLine - Add location information to specified debug information
|
|
/// entry.
|
|
void AddSourceLine(DIE *Die, const DIVariable *V) {
|
|
unsigned FileID = 0;
|
|
unsigned Line = V->getLineNumber();
|
|
CompileUnit *Unit = FindCompileUnit(V->getCompileUnit());
|
|
FileID = Unit->getID();
|
|
assert (FileID && "Invalid file id");
|
|
AddUInt(Die, DW_AT_decl_file, 0, FileID);
|
|
AddUInt(Die, DW_AT_decl_line, 0, Line);
|
|
}
|
|
|
|
/// AddSourceLine - Add location information to specified debug information
|
|
/// entry.
|
|
void AddSourceLine(DIE *Die, const DIGlobal *G) {
|
|
unsigned FileID = 0;
|
|
unsigned Line = G->getLineNumber();
|
|
CompileUnit *Unit = FindCompileUnit(G->getCompileUnit());
|
|
FileID = Unit->getID();
|
|
assert (FileID && "Invalid file id");
|
|
AddUInt(Die, DW_AT_decl_file, 0, FileID);
|
|
AddUInt(Die, DW_AT_decl_line, 0, Line);
|
|
}
|
|
|
|
void AddSourceLine(DIE *Die, const DIType *Ty) {
|
|
unsigned FileID = 0;
|
|
unsigned Line = Ty->getLineNumber();
|
|
DICompileUnit CU = Ty->getCompileUnit();
|
|
if (CU.isNull())
|
|
return;
|
|
CompileUnit *Unit = FindCompileUnit(CU);
|
|
FileID = Unit->getID();
|
|
assert (FileID && "Invalid file id");
|
|
AddUInt(Die, DW_AT_decl_file, 0, FileID);
|
|
AddUInt(Die, DW_AT_decl_line, 0, Line);
|
|
}
|
|
|
|
/// AddAddress - Add an address attribute to a die based on the location
|
|
/// provided.
|
|
void AddAddress(DIE *Die, unsigned Attribute,
|
|
const MachineLocation &Location) {
|
|
unsigned Reg = RI->getDwarfRegNum(Location.getReg(), false);
|
|
DIEBlock *Block = new DIEBlock();
|
|
|
|
if (Location.isReg()) {
|
|
if (Reg < 32) {
|
|
AddUInt(Block, 0, DW_FORM_data1, DW_OP_reg0 + Reg);
|
|
} else {
|
|
AddUInt(Block, 0, DW_FORM_data1, DW_OP_regx);
|
|
AddUInt(Block, 0, DW_FORM_udata, Reg);
|
|
}
|
|
} else {
|
|
if (Reg < 32) {
|
|
AddUInt(Block, 0, DW_FORM_data1, DW_OP_breg0 + Reg);
|
|
} else {
|
|
AddUInt(Block, 0, DW_FORM_data1, DW_OP_bregx);
|
|
AddUInt(Block, 0, DW_FORM_udata, Reg);
|
|
}
|
|
AddUInt(Block, 0, DW_FORM_sdata, Location.getOffset());
|
|
}
|
|
|
|
AddBlock(Die, Attribute, 0, Block);
|
|
}
|
|
|
|
/// AddType - Add a new type attribute to the specified entity.
|
|
void AddType(CompileUnit *DW_Unit, DIE *Entity, DIType Ty) {
|
|
if (Ty.isNull())
|
|
return;
|
|
|
|
// Check for pre-existence.
|
|
DIEntry *&Slot = DW_Unit->getDIEntrySlotFor(Ty.getGV());
|
|
// If it exists then use the existing value.
|
|
if (Slot) {
|
|
Entity->AddValue(DW_AT_type, DW_FORM_ref4, Slot);
|
|
return;
|
|
}
|
|
|
|
// Set up proxy.
|
|
Slot = NewDIEntry();
|
|
|
|
// Construct type.
|
|
DIE Buffer(DW_TAG_base_type);
|
|
if (Ty.isBasicType(Ty.getTag()))
|
|
ConstructTypeDIE(DW_Unit, Buffer, DIBasicType(Ty.getGV()));
|
|
else if (Ty.isDerivedType(Ty.getTag()))
|
|
ConstructTypeDIE(DW_Unit, Buffer, DIDerivedType(Ty.getGV()));
|
|
else {
|
|
assert(Ty.isCompositeType(Ty.getTag()) && "Unknown kind of DIType");
|
|
ConstructTypeDIE(DW_Unit, Buffer, DICompositeType(Ty.getGV()));
|
|
}
|
|
|
|
// Add debug information entry to entity and appropriate context.
|
|
DIE *Die = NULL;
|
|
DIDescriptor Context = Ty.getContext();
|
|
if (!Context.isNull())
|
|
Die = DW_Unit->getDieMapSlotFor(Context.getGV());
|
|
|
|
if (Die) {
|
|
DIE *Child = new DIE(Buffer);
|
|
Die->AddChild(Child);
|
|
Buffer.Detach();
|
|
SetDIEntry(Slot, Child);
|
|
} else {
|
|
Die = DW_Unit->AddDie(Buffer);
|
|
SetDIEntry(Slot, Die);
|
|
}
|
|
|
|
Entity->AddValue(DW_AT_type, DW_FORM_ref4, Slot);
|
|
}
|
|
|
|
/// ConstructTypeDIE - Construct basic type die from DIBasicType.
|
|
void ConstructTypeDIE(CompileUnit *DW_Unit, DIE &Buffer,
|
|
DIBasicType BTy) {
|
|
|
|
// Get core information.
|
|
std::string Name;
|
|
BTy.getName(Name);
|
|
Buffer.setTag(DW_TAG_base_type);
|
|
AddUInt(&Buffer, DW_AT_encoding, DW_FORM_data1, BTy.getEncoding());
|
|
// Add name if not anonymous or intermediate type.
|
|
if (!Name.empty())
|
|
AddString(&Buffer, DW_AT_name, DW_FORM_string, Name);
|
|
uint64_t Size = BTy.getSizeInBits() >> 3;
|
|
AddUInt(&Buffer, DW_AT_byte_size, 0, Size);
|
|
}
|
|
|
|
/// ConstructTypeDIE - Construct derived type die from DIDerivedType.
|
|
void ConstructTypeDIE(CompileUnit *DW_Unit, DIE &Buffer,
|
|
DIDerivedType DTy) {
|
|
|
|
// Get core information.
|
|
std::string Name;
|
|
DTy.getName(Name);
|
|
uint64_t Size = DTy.getSizeInBits() >> 3;
|
|
unsigned Tag = DTy.getTag();
|
|
|
|
// FIXME - Workaround for templates.
|
|
if (Tag == DW_TAG_inheritance) Tag = DW_TAG_reference_type;
|
|
|
|
Buffer.setTag(Tag);
|
|
|
|
// Map to main type, void will not have a type.
|
|
DIType FromTy = DTy.getTypeDerivedFrom();
|
|
AddType(DW_Unit, &Buffer, FromTy);
|
|
|
|
// Add name if not anonymous or intermediate type.
|
|
if (!Name.empty())
|
|
AddString(&Buffer, DW_AT_name, DW_FORM_string, Name);
|
|
|
|
// Add size if non-zero (derived types might be zero-sized.)
|
|
if (Size)
|
|
AddUInt(&Buffer, DW_AT_byte_size, 0, Size);
|
|
|
|
// Add source line info if available and TyDesc is not a forward
|
|
// declaration.
|
|
if (!DTy.isForwardDecl())
|
|
AddSourceLine(&Buffer, &DTy);
|
|
}
|
|
|
|
/// ConstructTypeDIE - Construct type DIE from DICompositeType.
|
|
void ConstructTypeDIE(CompileUnit *DW_Unit, DIE &Buffer,
|
|
DICompositeType CTy) {
|
|
// Get core information.
|
|
std::string Name;
|
|
CTy.getName(Name);
|
|
|
|
uint64_t Size = CTy.getSizeInBits() >> 3;
|
|
unsigned Tag = CTy.getTag();
|
|
Buffer.setTag(Tag);
|
|
|
|
switch (Tag) {
|
|
case DW_TAG_vector_type:
|
|
case DW_TAG_array_type:
|
|
ConstructArrayTypeDIE(DW_Unit, Buffer, &CTy);
|
|
break;
|
|
case DW_TAG_enumeration_type:
|
|
{
|
|
DIArray Elements = CTy.getTypeArray();
|
|
// Add enumerators to enumeration type.
|
|
for (unsigned i = 0, N = Elements.getNumElements(); i < N; ++i) {
|
|
DIE *ElemDie = NULL;
|
|
DIEnumerator Enum(Elements.getElement(i).getGV());
|
|
ElemDie = ConstructEnumTypeDIE(DW_Unit, &Enum);
|
|
Buffer.AddChild(ElemDie);
|
|
}
|
|
}
|
|
break;
|
|
case DW_TAG_subroutine_type:
|
|
{
|
|
// Add prototype flag.
|
|
AddUInt(&Buffer, DW_AT_prototyped, DW_FORM_flag, 1);
|
|
DIArray Elements = CTy.getTypeArray();
|
|
// Add return type.
|
|
DIDescriptor RTy = Elements.getElement(0);
|
|
AddType(DW_Unit, &Buffer, DIType(RTy.getGV()));
|
|
|
|
// Add arguments.
|
|
for (unsigned i = 1, N = Elements.getNumElements(); i < N; ++i) {
|
|
DIE *Arg = new DIE(DW_TAG_formal_parameter);
|
|
DIDescriptor Ty = Elements.getElement(i);
|
|
AddType(DW_Unit, Arg, DIType(Ty.getGV()));
|
|
Buffer.AddChild(Arg);
|
|
}
|
|
}
|
|
break;
|
|
case DW_TAG_structure_type:
|
|
case DW_TAG_union_type:
|
|
{
|
|
// Add elements to structure type.
|
|
DIArray Elements = CTy.getTypeArray();
|
|
|
|
// A forward struct declared type may not have elements available.
|
|
if (Elements.isNull())
|
|
break;
|
|
|
|
// Add elements to structure type.
|
|
for (unsigned i = 0, N = Elements.getNumElements(); i < N; ++i) {
|
|
DIDescriptor Element = Elements.getElement(i);
|
|
DIE *ElemDie = NULL;
|
|
if (Element.getTag() == dwarf::DW_TAG_subprogram)
|
|
ElemDie = CreateSubprogramDIE(DW_Unit,
|
|
DISubprogram(Element.getGV()));
|
|
else if (Element.getTag() == dwarf::DW_TAG_variable) // ???
|
|
ElemDie = CreateGlobalVariableDIE(DW_Unit,
|
|
DIGlobalVariable(Element.getGV()));
|
|
else
|
|
ElemDie = CreateMemberDIE(DW_Unit,
|
|
DIDerivedType(Element.getGV()));
|
|
Buffer.AddChild(ElemDie);
|
|
}
|
|
unsigned RLang = CTy.getRunTimeLang();
|
|
if (RLang)
|
|
AddUInt(&Buffer, DW_AT_APPLE_runtime_class, DW_FORM_data1, RLang);
|
|
}
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
// Add name if not anonymous or intermediate type.
|
|
if (!Name.empty())
|
|
AddString(&Buffer, DW_AT_name, DW_FORM_string, Name);
|
|
|
|
if (Tag == DW_TAG_enumeration_type || Tag == DW_TAG_structure_type
|
|
|| Tag == DW_TAG_union_type) {
|
|
// Add size if non-zero (derived types might be zero-sized.)
|
|
if (Size)
|
|
AddUInt(&Buffer, DW_AT_byte_size, 0, Size);
|
|
else {
|
|
// Add zero size if it is not a forward declaration.
|
|
if (CTy.isForwardDecl())
|
|
AddUInt(&Buffer, DW_AT_declaration, DW_FORM_flag, 1);
|
|
else
|
|
AddUInt(&Buffer, DW_AT_byte_size, 0, 0);
|
|
}
|
|
|
|
// Add source line info if available.
|
|
if (!CTy.isForwardDecl())
|
|
AddSourceLine(&Buffer, &CTy);
|
|
}
|
|
}
|
|
|
|
/// ConstructSubrangeDIE - Construct subrange DIE from DISubrange.
|
|
void ConstructSubrangeDIE(DIE &Buffer, DISubrange SR, DIE *IndexTy) {
|
|
int64_t L = SR.getLo();
|
|
int64_t H = SR.getHi();
|
|
DIE *DW_Subrange = new DIE(DW_TAG_subrange_type);
|
|
if (L != H) {
|
|
AddDIEntry(DW_Subrange, DW_AT_type, DW_FORM_ref4, IndexTy);
|
|
if (L)
|
|
AddSInt(DW_Subrange, DW_AT_lower_bound, 0, L);
|
|
AddSInt(DW_Subrange, DW_AT_upper_bound, 0, H);
|
|
}
|
|
Buffer.AddChild(DW_Subrange);
|
|
}
|
|
|
|
/// ConstructArrayTypeDIE - Construct array type DIE from DICompositeType.
|
|
void ConstructArrayTypeDIE(CompileUnit *DW_Unit, DIE &Buffer,
|
|
DICompositeType *CTy) {
|
|
Buffer.setTag(DW_TAG_array_type);
|
|
if (CTy->getTag() == DW_TAG_vector_type)
|
|
AddUInt(&Buffer, DW_AT_GNU_vector, DW_FORM_flag, 1);
|
|
|
|
// Emit derived type.
|
|
AddType(DW_Unit, &Buffer, CTy->getTypeDerivedFrom());
|
|
DIArray Elements = CTy->getTypeArray();
|
|
|
|
// Construct an anonymous type for index type.
|
|
DIE IdxBuffer(DW_TAG_base_type);
|
|
AddUInt(&IdxBuffer, DW_AT_byte_size, 0, sizeof(int32_t));
|
|
AddUInt(&IdxBuffer, DW_AT_encoding, DW_FORM_data1, DW_ATE_signed);
|
|
DIE *IndexTy = DW_Unit->AddDie(IdxBuffer);
|
|
|
|
// Add subranges to array type.
|
|
for (unsigned i = 0, N = Elements.getNumElements(); i < N; ++i) {
|
|
DIDescriptor Element = Elements.getElement(i);
|
|
if (Element.getTag() == dwarf::DW_TAG_subrange_type)
|
|
ConstructSubrangeDIE(Buffer, DISubrange(Element.getGV()), IndexTy);
|
|
}
|
|
}
|
|
|
|
/// ConstructEnumTypeDIE - Construct enum type DIE from DIEnumerator.
|
|
DIE *ConstructEnumTypeDIE(CompileUnit *DW_Unit, DIEnumerator *ETy) {
|
|
|
|
DIE *Enumerator = new DIE(DW_TAG_enumerator);
|
|
std::string Name;
|
|
ETy->getName(Name);
|
|
AddString(Enumerator, DW_AT_name, DW_FORM_string, Name);
|
|
int64_t Value = ETy->getEnumValue();
|
|
AddSInt(Enumerator, DW_AT_const_value, DW_FORM_sdata, Value);
|
|
return Enumerator;
|
|
}
|
|
|
|
/// CreateGlobalVariableDIE - Create new DIE using GV.
|
|
DIE *CreateGlobalVariableDIE(CompileUnit *DW_Unit, const DIGlobalVariable &GV)
|
|
{
|
|
DIE *GVDie = new DIE(DW_TAG_variable);
|
|
std::string Name;
|
|
GV.getDisplayName(Name);
|
|
AddString(GVDie, DW_AT_name, DW_FORM_string, Name);
|
|
std::string LinkageName;
|
|
GV.getLinkageName(LinkageName);
|
|
if (!LinkageName.empty())
|
|
AddString(GVDie, DW_AT_MIPS_linkage_name, DW_FORM_string, LinkageName);
|
|
AddType(DW_Unit, GVDie, GV.getType());
|
|
if (!GV.isLocalToUnit())
|
|
AddUInt(GVDie, DW_AT_external, DW_FORM_flag, 1);
|
|
AddSourceLine(GVDie, &GV);
|
|
return GVDie;
|
|
}
|
|
|
|
/// CreateMemberDIE - Create new member DIE.
|
|
DIE *CreateMemberDIE(CompileUnit *DW_Unit, const DIDerivedType &DT) {
|
|
DIE *MemberDie = new DIE(DT.getTag());
|
|
std::string Name;
|
|
DT.getName(Name);
|
|
if (!Name.empty())
|
|
AddString(MemberDie, DW_AT_name, DW_FORM_string, Name);
|
|
|
|
AddType(DW_Unit, MemberDie, DT.getTypeDerivedFrom());
|
|
|
|
AddSourceLine(MemberDie, &DT);
|
|
|
|
uint64_t Size = DT.getSizeInBits();
|
|
uint64_t FieldSize = DT.getOriginalTypeSize();
|
|
|
|
if (Size != FieldSize) {
|
|
// Handle bitfield.
|
|
AddUInt(MemberDie, DW_AT_byte_size, 0, DT.getOriginalTypeSize() >> 3);
|
|
AddUInt(MemberDie, DW_AT_bit_size, 0, DT.getSizeInBits());
|
|
|
|
uint64_t Offset = DT.getOffsetInBits();
|
|
uint64_t FieldOffset = Offset;
|
|
uint64_t AlignMask = ~(DT.getAlignInBits() - 1);
|
|
uint64_t HiMark = (Offset + FieldSize) & AlignMask;
|
|
FieldOffset = (HiMark - FieldSize);
|
|
Offset -= FieldOffset;
|
|
// Maybe we need to work from the other end.
|
|
if (TD->isLittleEndian()) Offset = FieldSize - (Offset + Size);
|
|
AddUInt(MemberDie, DW_AT_bit_offset, 0, Offset);
|
|
}
|
|
DIEBlock *Block = new DIEBlock();
|
|
AddUInt(Block, 0, DW_FORM_data1, DW_OP_plus_uconst);
|
|
AddUInt(Block, 0, DW_FORM_udata, DT.getOffsetInBits() >> 3);
|
|
AddBlock(MemberDie, DW_AT_data_member_location, 0, Block);
|
|
|
|
if (DT.isProtected())
|
|
AddUInt(MemberDie, DW_AT_accessibility, 0, DW_ACCESS_protected);
|
|
else if (DT.isPrivate())
|
|
AddUInt(MemberDie, DW_AT_accessibility, 0, DW_ACCESS_private);
|
|
|
|
return MemberDie;
|
|
}
|
|
|
|
/// CreateSubprogramDIE - Create new DIE using SP.
|
|
DIE *CreateSubprogramDIE(CompileUnit *DW_Unit,
|
|
const DISubprogram &SP,
|
|
bool IsConstructor = false) {
|
|
DIE *SPDie = new DIE(DW_TAG_subprogram);
|
|
std::string Name;
|
|
SP.getName(Name);
|
|
AddString(SPDie, DW_AT_name, DW_FORM_string, Name);
|
|
std::string LinkageName;
|
|
SP.getLinkageName(LinkageName);
|
|
if (!LinkageName.empty())
|
|
AddString(SPDie, DW_AT_MIPS_linkage_name, DW_FORM_string,
|
|
LinkageName);
|
|
AddSourceLine(SPDie, &SP);
|
|
|
|
DICompositeType SPTy = SP.getType();
|
|
DIArray Args = SPTy.getTypeArray();
|
|
|
|
// Add Return Type.
|
|
if (!IsConstructor) {
|
|
if (Args.isNull())
|
|
AddType(DW_Unit, SPDie, SPTy);
|
|
else
|
|
AddType(DW_Unit, SPDie, DIType(Args.getElement(0).getGV()));
|
|
}
|
|
|
|
if (!SP.isDefinition()) {
|
|
AddUInt(SPDie, DW_AT_declaration, DW_FORM_flag, 1);
|
|
// Add arguments.
|
|
// Do not add arguments for subprogram definition. They will be
|
|
// handled through RecordVariable.
|
|
if (!Args.isNull())
|
|
for (unsigned i = 1, N = Args.getNumElements(); i < N; ++i) {
|
|
DIE *Arg = new DIE(DW_TAG_formal_parameter);
|
|
AddType(DW_Unit, Arg, DIType(Args.getElement(i).getGV()));
|
|
AddUInt(Arg, DW_AT_artificial, DW_FORM_flag, 1); // ???
|
|
SPDie->AddChild(Arg);
|
|
}
|
|
}
|
|
|
|
unsigned Lang = SP.getCompileUnit().getLanguage();
|
|
if (Lang == DW_LANG_C99 || Lang == DW_LANG_C89
|
|
|| Lang == DW_LANG_ObjC)
|
|
AddUInt(SPDie, DW_AT_prototyped, DW_FORM_flag, 1);
|
|
|
|
if (!SP.isLocalToUnit())
|
|
AddUInt(SPDie, DW_AT_external, DW_FORM_flag, 1);
|
|
return SPDie;
|
|
}
|
|
|
|
/// FindCompileUnit - Get the compile unit for the given descriptor.
|
|
///
|
|
CompileUnit *FindCompileUnit(DICompileUnit Unit) {
|
|
CompileUnit *DW_Unit = CompileUnitMap[Unit.getGV()];
|
|
assert(DW_Unit && "Missing compile unit.");
|
|
return DW_Unit;
|
|
}
|
|
|
|
/// NewDbgScopeVariable - Create a new scope variable.
|
|
///
|
|
DIE *NewDbgScopeVariable(DbgVariable *DV, CompileUnit *Unit) {
|
|
// Get the descriptor.
|
|
const DIVariable &VD = DV->getVariable();
|
|
|
|
// Translate tag to proper Dwarf tag. The result variable is dropped for
|
|
// now.
|
|
unsigned Tag;
|
|
switch (VD.getTag()) {
|
|
case DW_TAG_return_variable: return NULL;
|
|
case DW_TAG_arg_variable: Tag = DW_TAG_formal_parameter; break;
|
|
case DW_TAG_auto_variable: // fall thru
|
|
default: Tag = DW_TAG_variable; break;
|
|
}
|
|
|
|
// Define variable debug information entry.
|
|
DIE *VariableDie = new DIE(Tag);
|
|
std::string Name;
|
|
VD.getName(Name);
|
|
AddString(VariableDie, DW_AT_name, DW_FORM_string, Name);
|
|
|
|
// Add source line info if available.
|
|
AddSourceLine(VariableDie, &VD);
|
|
|
|
// Add variable type.
|
|
AddType(Unit, VariableDie, VD.getType());
|
|
|
|
// Add variable address.
|
|
MachineLocation Location;
|
|
Location.set(RI->getFrameRegister(*MF),
|
|
RI->getFrameIndexOffset(*MF, DV->getFrameIndex()));
|
|
AddAddress(VariableDie, DW_AT_location, Location);
|
|
|
|
return VariableDie;
|
|
}
|
|
|
|
/// getOrCreateScope - Returns the scope associated with the given descriptor.
|
|
///
|
|
DbgScope *getOrCreateScope(GlobalVariable *V) {
|
|
DbgScope *&Slot = DbgScopeMap[V];
|
|
if (Slot) return Slot;
|
|
|
|
// FIXME - breaks down when the context is an inlined function.
|
|
DIDescriptor ParentDesc;
|
|
DIDescriptor Desc(V);
|
|
|
|
if (Desc.getTag() == dwarf::DW_TAG_lexical_block) {
|
|
DIBlock Block(V);
|
|
ParentDesc = Block.getContext();
|
|
}
|
|
|
|
DbgScope *Parent = ParentDesc.isNull() ?
|
|
NULL : getOrCreateScope(ParentDesc.getGV());
|
|
Slot = new DbgScope(Parent, Desc);
|
|
|
|
if (Parent) {
|
|
Parent->AddScope(Slot);
|
|
} else if (RootDbgScope) {
|
|
// FIXME - Add inlined function scopes to the root so we can delete them
|
|
// later. Long term, handle inlined functions properly.
|
|
RootDbgScope->AddScope(Slot);
|
|
} else {
|
|
// First function is top level function.
|
|
RootDbgScope = Slot;
|
|
}
|
|
|
|
return Slot;
|
|
}
|
|
|
|
/// ConstructDbgScope - Construct the components of a scope.
|
|
///
|
|
void ConstructDbgScope(DbgScope *ParentScope,
|
|
unsigned ParentStartID, unsigned ParentEndID,
|
|
DIE *ParentDie, CompileUnit *Unit) {
|
|
// Add variables to scope.
|
|
SmallVector<DbgVariable *, 8> &Variables = ParentScope->getVariables();
|
|
for (unsigned i = 0, N = Variables.size(); i < N; ++i) {
|
|
DIE *VariableDie = NewDbgScopeVariable(Variables[i], Unit);
|
|
if (VariableDie) ParentDie->AddChild(VariableDie);
|
|
}
|
|
|
|
// Add nested scopes.
|
|
SmallVector<DbgScope *, 4> &Scopes = ParentScope->getScopes();
|
|
for (unsigned j = 0, M = Scopes.size(); j < M; ++j) {
|
|
// Define the Scope debug information entry.
|
|
DbgScope *Scope = Scopes[j];
|
|
// FIXME - Ignore inlined functions for the time being.
|
|
if (!Scope->getParent()) continue;
|
|
|
|
unsigned StartID = MMI->MappedLabel(Scope->getStartLabelID());
|
|
unsigned EndID = MMI->MappedLabel(Scope->getEndLabelID());
|
|
|
|
// Ignore empty scopes.
|
|
if (StartID == EndID && StartID != 0) continue;
|
|
if (Scope->getScopes().empty() && Scope->getVariables().empty()) continue;
|
|
|
|
if (StartID == ParentStartID && EndID == ParentEndID) {
|
|
// Just add stuff to the parent scope.
|
|
ConstructDbgScope(Scope, ParentStartID, ParentEndID, ParentDie, Unit);
|
|
} else {
|
|
DIE *ScopeDie = new DIE(DW_TAG_lexical_block);
|
|
|
|
// Add the scope bounds.
|
|
if (StartID) {
|
|
AddLabel(ScopeDie, DW_AT_low_pc, DW_FORM_addr,
|
|
DWLabel("label", StartID));
|
|
} else {
|
|
AddLabel(ScopeDie, DW_AT_low_pc, DW_FORM_addr,
|
|
DWLabel("func_begin", SubprogramCount));
|
|
}
|
|
if (EndID) {
|
|
AddLabel(ScopeDie, DW_AT_high_pc, DW_FORM_addr,
|
|
DWLabel("label", EndID));
|
|
} else {
|
|
AddLabel(ScopeDie, DW_AT_high_pc, DW_FORM_addr,
|
|
DWLabel("func_end", SubprogramCount));
|
|
}
|
|
|
|
// Add the scope contents.
|
|
ConstructDbgScope(Scope, StartID, EndID, ScopeDie, Unit);
|
|
ParentDie->AddChild(ScopeDie);
|
|
}
|
|
}
|
|
}
|
|
|
|
/// ConstructRootDbgScope - Construct the scope for the subprogram.
|
|
///
|
|
void ConstructRootDbgScope(DbgScope *RootScope) {
|
|
// Exit if there is no root scope.
|
|
if (!RootScope) return;
|
|
DIDescriptor Desc = RootScope->getDesc();
|
|
if (Desc.isNull())
|
|
return;
|
|
|
|
// Get the subprogram debug information entry.
|
|
DISubprogram SPD(Desc.getGV());
|
|
|
|
// Get the compile unit context.
|
|
CompileUnit *Unit = MainCU;
|
|
if (!Unit)
|
|
Unit = FindCompileUnit(SPD.getCompileUnit());
|
|
|
|
// Get the subprogram die.
|
|
DIE *SPDie = Unit->getDieMapSlotFor(SPD.getGV());
|
|
assert(SPDie && "Missing subprogram descriptor");
|
|
|
|
// Add the function bounds.
|
|
AddLabel(SPDie, DW_AT_low_pc, DW_FORM_addr,
|
|
DWLabel("func_begin", SubprogramCount));
|
|
AddLabel(SPDie, DW_AT_high_pc, DW_FORM_addr,
|
|
DWLabel("func_end", SubprogramCount));
|
|
MachineLocation Location(RI->getFrameRegister(*MF));
|
|
AddAddress(SPDie, DW_AT_frame_base, Location);
|
|
|
|
ConstructDbgScope(RootScope, 0, 0, SPDie, Unit);
|
|
}
|
|
|
|
/// ConstructDefaultDbgScope - Construct a default scope for the subprogram.
|
|
///
|
|
void ConstructDefaultDbgScope(MachineFunction *MF) {
|
|
const char *FnName = MF->getFunction()->getNameStart();
|
|
if (MainCU) {
|
|
std::map<std::string, DIE*> &Globals = MainCU->getGlobals();
|
|
std::map<std::string, DIE*>::iterator GI = Globals.find(FnName);
|
|
if (GI != Globals.end()) {
|
|
DIE *SPDie = GI->second;
|
|
|
|
// Add the function bounds.
|
|
AddLabel(SPDie, DW_AT_low_pc, DW_FORM_addr,
|
|
DWLabel("func_begin", SubprogramCount));
|
|
AddLabel(SPDie, DW_AT_high_pc, DW_FORM_addr,
|
|
DWLabel("func_end", SubprogramCount));
|
|
|
|
MachineLocation Location(RI->getFrameRegister(*MF));
|
|
AddAddress(SPDie, DW_AT_frame_base, Location);
|
|
return;
|
|
}
|
|
} else {
|
|
for (unsigned i = 0, e = CompileUnits.size(); i != e; ++i) {
|
|
CompileUnit *Unit = CompileUnits[i];
|
|
std::map<std::string, DIE*> &Globals = Unit->getGlobals();
|
|
std::map<std::string, DIE*>::iterator GI = Globals.find(FnName);
|
|
if (GI != Globals.end()) {
|
|
DIE *SPDie = GI->second;
|
|
|
|
// Add the function bounds.
|
|
AddLabel(SPDie, DW_AT_low_pc, DW_FORM_addr,
|
|
DWLabel("func_begin", SubprogramCount));
|
|
AddLabel(SPDie, DW_AT_high_pc, DW_FORM_addr,
|
|
DWLabel("func_end", SubprogramCount));
|
|
|
|
MachineLocation Location(RI->getFrameRegister(*MF));
|
|
AddAddress(SPDie, DW_AT_frame_base, Location);
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
|
|
#if 0
|
|
// FIXME: This is causing an abort because C++ mangled names are compared
|
|
// with their unmangled counterparts. See PR2885. Don't do this assert.
|
|
assert(0 && "Couldn't find DIE for machine function!");
|
|
#endif
|
|
return;
|
|
}
|
|
|
|
/// EmitInitial - Emit initial Dwarf declarations. This is necessary for cc
|
|
/// tools to recognize the object file contains Dwarf information.
|
|
void EmitInitial() {
|
|
// Check to see if we already emitted intial headers.
|
|
if (didInitial) return;
|
|
didInitial = true;
|
|
|
|
// Dwarf sections base addresses.
|
|
if (TAI->doesDwarfRequireFrameSection()) {
|
|
Asm->SwitchToDataSection(TAI->getDwarfFrameSection());
|
|
EmitLabel("section_debug_frame", 0);
|
|
}
|
|
Asm->SwitchToDataSection(TAI->getDwarfInfoSection());
|
|
EmitLabel("section_info", 0);
|
|
Asm->SwitchToDataSection(TAI->getDwarfAbbrevSection());
|
|
EmitLabel("section_abbrev", 0);
|
|
Asm->SwitchToDataSection(TAI->getDwarfARangesSection());
|
|
EmitLabel("section_aranges", 0);
|
|
if (TAI->doesSupportMacInfoSection()) {
|
|
Asm->SwitchToDataSection(TAI->getDwarfMacInfoSection());
|
|
EmitLabel("section_macinfo", 0);
|
|
}
|
|
Asm->SwitchToDataSection(TAI->getDwarfLineSection());
|
|
EmitLabel("section_line", 0);
|
|
Asm->SwitchToDataSection(TAI->getDwarfLocSection());
|
|
EmitLabel("section_loc", 0);
|
|
Asm->SwitchToDataSection(TAI->getDwarfPubNamesSection());
|
|
EmitLabel("section_pubnames", 0);
|
|
Asm->SwitchToDataSection(TAI->getDwarfStrSection());
|
|
EmitLabel("section_str", 0);
|
|
Asm->SwitchToDataSection(TAI->getDwarfRangesSection());
|
|
EmitLabel("section_ranges", 0);
|
|
|
|
Asm->SwitchToSection(TAI->getTextSection());
|
|
EmitLabel("text_begin", 0);
|
|
Asm->SwitchToSection(TAI->getDataSection());
|
|
EmitLabel("data_begin", 0);
|
|
}
|
|
|
|
/// EmitDIE - Recusively Emits a debug information entry.
|
|
///
|
|
void EmitDIE(DIE *Die) {
|
|
// Get the abbreviation for this DIE.
|
|
unsigned AbbrevNumber = Die->getAbbrevNumber();
|
|
const DIEAbbrev *Abbrev = Abbreviations[AbbrevNumber - 1];
|
|
|
|
Asm->EOL();
|
|
|
|
// Emit the code (index) for the abbreviation.
|
|
Asm->EmitULEB128Bytes(AbbrevNumber);
|
|
|
|
if (VerboseAsm)
|
|
Asm->EOL(std::string("Abbrev [" +
|
|
utostr(AbbrevNumber) +
|
|
"] 0x" + utohexstr(Die->getOffset()) +
|
|
":0x" + utohexstr(Die->getSize()) + " " +
|
|
TagString(Abbrev->getTag())));
|
|
else
|
|
Asm->EOL();
|
|
|
|
SmallVector<DIEValue*, 32> &Values = Die->getValues();
|
|
const SmallVector<DIEAbbrevData, 8> &AbbrevData = Abbrev->getData();
|
|
|
|
// Emit the DIE attribute values.
|
|
for (unsigned i = 0, N = Values.size(); i < N; ++i) {
|
|
unsigned Attr = AbbrevData[i].getAttribute();
|
|
unsigned Form = AbbrevData[i].getForm();
|
|
assert(Form && "Too many attributes for DIE (check abbreviation)");
|
|
|
|
switch (Attr) {
|
|
case DW_AT_sibling: {
|
|
Asm->EmitInt32(Die->SiblingOffset());
|
|
break;
|
|
}
|
|
default: {
|
|
// Emit an attribute using the defined form.
|
|
Values[i]->EmitValue(*this, Form);
|
|
break;
|
|
}
|
|
}
|
|
|
|
Asm->EOL(AttributeString(Attr));
|
|
}
|
|
|
|
// Emit the DIE children if any.
|
|
if (Abbrev->getChildrenFlag() == DW_CHILDREN_yes) {
|
|
const std::vector<DIE *> &Children = Die->getChildren();
|
|
|
|
for (unsigned j = 0, M = Children.size(); j < M; ++j) {
|
|
EmitDIE(Children[j]);
|
|
}
|
|
|
|
Asm->EmitInt8(0); Asm->EOL("End Of Children Mark");
|
|
}
|
|
}
|
|
|
|
/// SizeAndOffsetDie - Compute the size and offset of a DIE.
|
|
///
|
|
unsigned SizeAndOffsetDie(DIE *Die, unsigned Offset, bool Last) {
|
|
// Get the children.
|
|
const std::vector<DIE *> &Children = Die->getChildren();
|
|
|
|
// If not last sibling and has children then add sibling offset attribute.
|
|
if (!Last && !Children.empty()) Die->AddSiblingOffset();
|
|
|
|
// Record the abbreviation.
|
|
AssignAbbrevNumber(Die->getAbbrev());
|
|
|
|
// Get the abbreviation for this DIE.
|
|
unsigned AbbrevNumber = Die->getAbbrevNumber();
|
|
const DIEAbbrev *Abbrev = Abbreviations[AbbrevNumber - 1];
|
|
|
|
// Set DIE offset
|
|
Die->setOffset(Offset);
|
|
|
|
// Start the size with the size of abbreviation code.
|
|
Offset += TargetAsmInfo::getULEB128Size(AbbrevNumber);
|
|
|
|
const SmallVector<DIEValue*, 32> &Values = Die->getValues();
|
|
const SmallVector<DIEAbbrevData, 8> &AbbrevData = Abbrev->getData();
|
|
|
|
// Size the DIE attribute values.
|
|
for (unsigned i = 0, N = Values.size(); i < N; ++i) {
|
|
// Size attribute value.
|
|
Offset += Values[i]->SizeOf(*this, AbbrevData[i].getForm());
|
|
}
|
|
|
|
// Size the DIE children if any.
|
|
if (!Children.empty()) {
|
|
assert(Abbrev->getChildrenFlag() == DW_CHILDREN_yes &&
|
|
"Children flag not set");
|
|
|
|
for (unsigned j = 0, M = Children.size(); j < M; ++j) {
|
|
Offset = SizeAndOffsetDie(Children[j], Offset, (j + 1) == M);
|
|
}
|
|
|
|
// End of children marker.
|
|
Offset += sizeof(int8_t);
|
|
}
|
|
|
|
Die->setSize(Offset - Die->getOffset());
|
|
return Offset;
|
|
}
|
|
|
|
/// SizeAndOffsets - Compute the size and offset of all the DIEs.
|
|
///
|
|
void SizeAndOffsets() {
|
|
// Process base compile unit.
|
|
if (MainCU) {
|
|
// Compute size of compile unit header
|
|
unsigned Offset = sizeof(int32_t) + // Length of Compilation Unit Info
|
|
sizeof(int16_t) + // DWARF version number
|
|
sizeof(int32_t) + // Offset Into Abbrev. Section
|
|
sizeof(int8_t); // Pointer Size (in bytes)
|
|
SizeAndOffsetDie(MainCU->getDie(), Offset, true);
|
|
return;
|
|
}
|
|
for (unsigned i = 0, e = CompileUnits.size(); i != e; ++i) {
|
|
CompileUnit *Unit = CompileUnits[i];
|
|
// Compute size of compile unit header
|
|
unsigned Offset = sizeof(int32_t) + // Length of Compilation Unit Info
|
|
sizeof(int16_t) + // DWARF version number
|
|
sizeof(int32_t) + // Offset Into Abbrev. Section
|
|
sizeof(int8_t); // Pointer Size (in bytes)
|
|
SizeAndOffsetDie(Unit->getDie(), Offset, true);
|
|
}
|
|
}
|
|
|
|
/// EmitDebugInfo / EmitDebugInfoPerCU - Emit the debug info section.
|
|
///
|
|
void EmitDebugInfoPerCU(CompileUnit *Unit) {
|
|
DIE *Die = Unit->getDie();
|
|
// Emit the compile units header.
|
|
EmitLabel("info_begin", Unit->getID());
|
|
// Emit size of content not including length itself
|
|
unsigned ContentSize = Die->getSize() +
|
|
sizeof(int16_t) + // DWARF version number
|
|
sizeof(int32_t) + // Offset Into Abbrev. Section
|
|
sizeof(int8_t) + // Pointer Size (in bytes)
|
|
sizeof(int32_t); // FIXME - extra pad for gdb bug.
|
|
|
|
Asm->EmitInt32(ContentSize); Asm->EOL("Length of Compilation Unit Info");
|
|
Asm->EmitInt16(DWARF_VERSION); Asm->EOL("DWARF version number");
|
|
EmitSectionOffset("abbrev_begin", "section_abbrev", 0, 0, true, false);
|
|
Asm->EOL("Offset Into Abbrev. Section");
|
|
Asm->EmitInt8(TD->getPointerSize()); Asm->EOL("Address Size (in bytes)");
|
|
|
|
EmitDIE(Die);
|
|
// FIXME - extra padding for gdb bug.
|
|
Asm->EmitInt8(0); Asm->EOL("Extra Pad For GDB");
|
|
Asm->EmitInt8(0); Asm->EOL("Extra Pad For GDB");
|
|
Asm->EmitInt8(0); Asm->EOL("Extra Pad For GDB");
|
|
Asm->EmitInt8(0); Asm->EOL("Extra Pad For GDB");
|
|
EmitLabel("info_end", Unit->getID());
|
|
|
|
Asm->EOL();
|
|
}
|
|
|
|
void EmitDebugInfo() {
|
|
// Start debug info section.
|
|
Asm->SwitchToDataSection(TAI->getDwarfInfoSection());
|
|
|
|
if (MainCU) {
|
|
EmitDebugInfoPerCU(MainCU);
|
|
return;
|
|
}
|
|
|
|
for (unsigned i = 0, e = CompileUnits.size(); i != e; ++i)
|
|
EmitDebugInfoPerCU(CompileUnits[i]);
|
|
}
|
|
|
|
/// EmitAbbreviations - Emit the abbreviation section.
|
|
///
|
|
void EmitAbbreviations() const {
|
|
// Check to see if it is worth the effort.
|
|
if (!Abbreviations.empty()) {
|
|
// Start the debug abbrev section.
|
|
Asm->SwitchToDataSection(TAI->getDwarfAbbrevSection());
|
|
|
|
EmitLabel("abbrev_begin", 0);
|
|
|
|
// For each abbrevation.
|
|
for (unsigned i = 0, N = Abbreviations.size(); i < N; ++i) {
|
|
// Get abbreviation data
|
|
const DIEAbbrev *Abbrev = Abbreviations[i];
|
|
|
|
// Emit the abbrevations code (base 1 index.)
|
|
Asm->EmitULEB128Bytes(Abbrev->getNumber());
|
|
Asm->EOL("Abbreviation Code");
|
|
|
|
// Emit the abbreviations data.
|
|
Abbrev->Emit(*this);
|
|
|
|
Asm->EOL();
|
|
}
|
|
|
|
// Mark end of abbreviations.
|
|
Asm->EmitULEB128Bytes(0); Asm->EOL("EOM(3)");
|
|
|
|
EmitLabel("abbrev_end", 0);
|
|
|
|
Asm->EOL();
|
|
}
|
|
}
|
|
|
|
/// EmitEndOfLineMatrix - Emit the last address of the section and the end of
|
|
/// the line matrix.
|
|
///
|
|
void EmitEndOfLineMatrix(unsigned SectionEnd) {
|
|
// Define last address of section.
|
|
Asm->EmitInt8(0); Asm->EOL("Extended Op");
|
|
Asm->EmitInt8(TD->getPointerSize() + 1); Asm->EOL("Op size");
|
|
Asm->EmitInt8(DW_LNE_set_address); Asm->EOL("DW_LNE_set_address");
|
|
EmitReference("section_end", SectionEnd); Asm->EOL("Section end label");
|
|
|
|
// Mark end of matrix.
|
|
Asm->EmitInt8(0); Asm->EOL("DW_LNE_end_sequence");
|
|
Asm->EmitULEB128Bytes(1); Asm->EOL();
|
|
Asm->EmitInt8(1); Asm->EOL();
|
|
}
|
|
|
|
/// EmitDebugLines - Emit source line information.
|
|
///
|
|
void EmitDebugLines() {
|
|
// If the target is using .loc/.file, the assembler will be emitting the
|
|
// .debug_line table automatically.
|
|
if (TAI->hasDotLocAndDotFile())
|
|
return;
|
|
|
|
// Minimum line delta, thus ranging from -10..(255-10).
|
|
const int MinLineDelta = -(DW_LNS_fixed_advance_pc + 1);
|
|
// Maximum line delta, thus ranging from -10..(255-10).
|
|
const int MaxLineDelta = 255 + MinLineDelta;
|
|
|
|
// Start the dwarf line section.
|
|
Asm->SwitchToDataSection(TAI->getDwarfLineSection());
|
|
|
|
// Construct the section header.
|
|
|
|
EmitDifference("line_end", 0, "line_begin", 0, true);
|
|
Asm->EOL("Length of Source Line Info");
|
|
EmitLabel("line_begin", 0);
|
|
|
|
Asm->EmitInt16(DWARF_VERSION); Asm->EOL("DWARF version number");
|
|
|
|
EmitDifference("line_prolog_end", 0, "line_prolog_begin", 0, true);
|
|
Asm->EOL("Prolog Length");
|
|
EmitLabel("line_prolog_begin", 0);
|
|
|
|
Asm->EmitInt8(1); Asm->EOL("Minimum Instruction Length");
|
|
|
|
Asm->EmitInt8(1); Asm->EOL("Default is_stmt_start flag");
|
|
|
|
Asm->EmitInt8(MinLineDelta); Asm->EOL("Line Base Value (Special Opcodes)");
|
|
|
|
Asm->EmitInt8(MaxLineDelta); Asm->EOL("Line Range Value (Special Opcodes)");
|
|
|
|
Asm->EmitInt8(-MinLineDelta); Asm->EOL("Special Opcode Base");
|
|
|
|
// Line number standard opcode encodings argument count
|
|
Asm->EmitInt8(0); Asm->EOL("DW_LNS_copy arg count");
|
|
Asm->EmitInt8(1); Asm->EOL("DW_LNS_advance_pc arg count");
|
|
Asm->EmitInt8(1); Asm->EOL("DW_LNS_advance_line arg count");
|
|
Asm->EmitInt8(1); Asm->EOL("DW_LNS_set_file arg count");
|
|
Asm->EmitInt8(1); Asm->EOL("DW_LNS_set_column arg count");
|
|
Asm->EmitInt8(0); Asm->EOL("DW_LNS_negate_stmt arg count");
|
|
Asm->EmitInt8(0); Asm->EOL("DW_LNS_set_basic_block arg count");
|
|
Asm->EmitInt8(0); Asm->EOL("DW_LNS_const_add_pc arg count");
|
|
Asm->EmitInt8(1); Asm->EOL("DW_LNS_fixed_advance_pc arg count");
|
|
|
|
// Emit directories.
|
|
for (unsigned DI = 1, DE = getNumSourceDirectories()+1; DI != DE; ++DI) {
|
|
Asm->EmitString(getSourceDirectoryName(DI));
|
|
Asm->EOL("Directory");
|
|
}
|
|
Asm->EmitInt8(0); Asm->EOL("End of directories");
|
|
|
|
// Emit files.
|
|
for (unsigned SI = 1, SE = getNumSourceIds()+1; SI != SE; ++SI) {
|
|
// Remember source id starts at 1.
|
|
std::pair<unsigned, unsigned> Id = getSourceDirectoryAndFileIds(SI);
|
|
Asm->EmitString(getSourceFileName(Id.second));
|
|
Asm->EOL("Source");
|
|
Asm->EmitULEB128Bytes(Id.first);
|
|
Asm->EOL("Directory #");
|
|
Asm->EmitULEB128Bytes(0);
|
|
Asm->EOL("Mod date");
|
|
Asm->EmitULEB128Bytes(0);
|
|
Asm->EOL("File size");
|
|
}
|
|
Asm->EmitInt8(0); Asm->EOL("End of files");
|
|
|
|
EmitLabel("line_prolog_end", 0);
|
|
|
|
// A sequence for each text section.
|
|
unsigned SecSrcLinesSize = SectionSourceLines.size();
|
|
|
|
for (unsigned j = 0; j < SecSrcLinesSize; ++j) {
|
|
// Isolate current sections line info.
|
|
const std::vector<SrcLineInfo> &LineInfos = SectionSourceLines[j];
|
|
|
|
if (VerboseAsm) {
|
|
const Section* S = SectionMap[j + 1];
|
|
O << '\t' << TAI->getCommentString() << " Section"
|
|
<< S->getName() << '\n';
|
|
} else
|
|
Asm->EOL();
|
|
|
|
// Dwarf assumes we start with first line of first source file.
|
|
unsigned Source = 1;
|
|
unsigned Line = 1;
|
|
|
|
// Construct rows of the address, source, line, column matrix.
|
|
for (unsigned i = 0, N = LineInfos.size(); i < N; ++i) {
|
|
const SrcLineInfo &LineInfo = LineInfos[i];
|
|
unsigned LabelID = MMI->MappedLabel(LineInfo.getLabelID());
|
|
if (!LabelID) continue;
|
|
|
|
if (!VerboseAsm)
|
|
Asm->EOL();
|
|
else {
|
|
std::pair<unsigned, unsigned> SourceID =
|
|
getSourceDirectoryAndFileIds(LineInfo.getSourceID());
|
|
O << '\t' << TAI->getCommentString() << ' '
|
|
<< getSourceDirectoryName(SourceID.first) << ' '
|
|
<< getSourceFileName(SourceID.second)
|
|
<<" :" << utostr_32(LineInfo.getLine()) << '\n';
|
|
}
|
|
|
|
// Define the line address.
|
|
Asm->EmitInt8(0); Asm->EOL("Extended Op");
|
|
Asm->EmitInt8(TD->getPointerSize() + 1); Asm->EOL("Op size");
|
|
Asm->EmitInt8(DW_LNE_set_address); Asm->EOL("DW_LNE_set_address");
|
|
EmitReference("label", LabelID); Asm->EOL("Location label");
|
|
|
|
// If change of source, then switch to the new source.
|
|
if (Source != LineInfo.getSourceID()) {
|
|
Source = LineInfo.getSourceID();
|
|
Asm->EmitInt8(DW_LNS_set_file); Asm->EOL("DW_LNS_set_file");
|
|
Asm->EmitULEB128Bytes(Source); Asm->EOL("New Source");
|
|
}
|
|
|
|
// If change of line.
|
|
if (Line != LineInfo.getLine()) {
|
|
// Determine offset.
|
|
int Offset = LineInfo.getLine() - Line;
|
|
int Delta = Offset - MinLineDelta;
|
|
|
|
// Update line.
|
|
Line = LineInfo.getLine();
|
|
|
|
// If delta is small enough and in range...
|
|
if (Delta >= 0 && Delta < (MaxLineDelta - 1)) {
|
|
// ... then use fast opcode.
|
|
Asm->EmitInt8(Delta - MinLineDelta); Asm->EOL("Line Delta");
|
|
} else {
|
|
// ... otherwise use long hand.
|
|
Asm->EmitInt8(DW_LNS_advance_line); Asm->EOL("DW_LNS_advance_line");
|
|
Asm->EmitSLEB128Bytes(Offset); Asm->EOL("Line Offset");
|
|
Asm->EmitInt8(DW_LNS_copy); Asm->EOL("DW_LNS_copy");
|
|
}
|
|
} else {
|
|
// Copy the previous row (different address or source)
|
|
Asm->EmitInt8(DW_LNS_copy); Asm->EOL("DW_LNS_copy");
|
|
}
|
|
}
|
|
|
|
EmitEndOfLineMatrix(j + 1);
|
|
}
|
|
|
|
if (SecSrcLinesSize == 0)
|
|
// Because we're emitting a debug_line section, we still need a line
|
|
// table. The linker and friends expect it to exist. If there's nothing to
|
|
// put into it, emit an empty table.
|
|
EmitEndOfLineMatrix(1);
|
|
|
|
EmitLabel("line_end", 0);
|
|
|
|
Asm->EOL();
|
|
}
|
|
|
|
/// EmitCommonDebugFrame - Emit common frame info into a debug frame section.
|
|
///
|
|
void EmitCommonDebugFrame() {
|
|
if (!TAI->doesDwarfRequireFrameSection())
|
|
return;
|
|
|
|
int stackGrowth =
|
|
Asm->TM.getFrameInfo()->getStackGrowthDirection() ==
|
|
TargetFrameInfo::StackGrowsUp ?
|
|
TD->getPointerSize() : -TD->getPointerSize();
|
|
|
|
// Start the dwarf frame section.
|
|
Asm->SwitchToDataSection(TAI->getDwarfFrameSection());
|
|
|
|
EmitLabel("debug_frame_common", 0);
|
|
EmitDifference("debug_frame_common_end", 0,
|
|
"debug_frame_common_begin", 0, true);
|
|
Asm->EOL("Length of Common Information Entry");
|
|
|
|
EmitLabel("debug_frame_common_begin", 0);
|
|
Asm->EmitInt32((int)DW_CIE_ID);
|
|
Asm->EOL("CIE Identifier Tag");
|
|
Asm->EmitInt8(DW_CIE_VERSION);
|
|
Asm->EOL("CIE Version");
|
|
Asm->EmitString("");
|
|
Asm->EOL("CIE Augmentation");
|
|
Asm->EmitULEB128Bytes(1);
|
|
Asm->EOL("CIE Code Alignment Factor");
|
|
Asm->EmitSLEB128Bytes(stackGrowth);
|
|
Asm->EOL("CIE Data Alignment Factor");
|
|
Asm->EmitInt8(RI->getDwarfRegNum(RI->getRARegister(), false));
|
|
Asm->EOL("CIE RA Column");
|
|
|
|
std::vector<MachineMove> Moves;
|
|
RI->getInitialFrameState(Moves);
|
|
|
|
EmitFrameMoves(NULL, 0, Moves, false);
|
|
|
|
Asm->EmitAlignment(2, 0, 0, false);
|
|
EmitLabel("debug_frame_common_end", 0);
|
|
|
|
Asm->EOL();
|
|
}
|
|
|
|
/// EmitFunctionDebugFrame - Emit per function frame info into a debug frame
|
|
/// section.
|
|
void EmitFunctionDebugFrame(const FunctionDebugFrameInfo &DebugFrameInfo) {
|
|
if (!TAI->doesDwarfRequireFrameSection())
|
|
return;
|
|
|
|
// Start the dwarf frame section.
|
|
Asm->SwitchToDataSection(TAI->getDwarfFrameSection());
|
|
|
|
EmitDifference("debug_frame_end", DebugFrameInfo.Number,
|
|
"debug_frame_begin", DebugFrameInfo.Number, true);
|
|
Asm->EOL("Length of Frame Information Entry");
|
|
|
|
EmitLabel("debug_frame_begin", DebugFrameInfo.Number);
|
|
|
|
EmitSectionOffset("debug_frame_common", "section_debug_frame",
|
|
0, 0, true, false);
|
|
Asm->EOL("FDE CIE offset");
|
|
|
|
EmitReference("func_begin", DebugFrameInfo.Number);
|
|
Asm->EOL("FDE initial location");
|
|
EmitDifference("func_end", DebugFrameInfo.Number,
|
|
"func_begin", DebugFrameInfo.Number);
|
|
Asm->EOL("FDE address range");
|
|
|
|
EmitFrameMoves("func_begin", DebugFrameInfo.Number, DebugFrameInfo.Moves,
|
|
false);
|
|
|
|
Asm->EmitAlignment(2, 0, 0, false);
|
|
EmitLabel("debug_frame_end", DebugFrameInfo.Number);
|
|
|
|
Asm->EOL();
|
|
}
|
|
|
|
void EmitDebugPubNamesPerCU(CompileUnit *Unit) {
|
|
EmitDifference("pubnames_end", Unit->getID(),
|
|
"pubnames_begin", Unit->getID(), true);
|
|
Asm->EOL("Length of Public Names Info");
|
|
|
|
EmitLabel("pubnames_begin", Unit->getID());
|
|
|
|
Asm->EmitInt16(DWARF_VERSION); Asm->EOL("DWARF Version");
|
|
|
|
EmitSectionOffset("info_begin", "section_info",
|
|
Unit->getID(), 0, true, false);
|
|
Asm->EOL("Offset of Compilation Unit Info");
|
|
|
|
EmitDifference("info_end", Unit->getID(), "info_begin", Unit->getID(),
|
|
true);
|
|
Asm->EOL("Compilation Unit Length");
|
|
|
|
std::map<std::string, DIE *> &Globals = Unit->getGlobals();
|
|
for (std::map<std::string, DIE *>::iterator GI = Globals.begin(),
|
|
GE = Globals.end(); GI != GE; ++GI) {
|
|
const std::string &Name = GI->first;
|
|
DIE * Entity = GI->second;
|
|
|
|
Asm->EmitInt32(Entity->getOffset()); Asm->EOL("DIE offset");
|
|
Asm->EmitString(Name); Asm->EOL("External Name");
|
|
}
|
|
|
|
Asm->EmitInt32(0); Asm->EOL("End Mark");
|
|
EmitLabel("pubnames_end", Unit->getID());
|
|
|
|
Asm->EOL();
|
|
}
|
|
|
|
/// EmitDebugPubNames - Emit visible names into a debug pubnames section.
|
|
///
|
|
void EmitDebugPubNames() {
|
|
// Start the dwarf pubnames section.
|
|
Asm->SwitchToDataSection(TAI->getDwarfPubNamesSection());
|
|
|
|
if (MainCU) {
|
|
EmitDebugPubNamesPerCU(MainCU);
|
|
return;
|
|
}
|
|
|
|
for (unsigned i = 0, e = CompileUnits.size(); i != e; ++i)
|
|
EmitDebugPubNamesPerCU(CompileUnits[i]);
|
|
}
|
|
|
|
/// EmitDebugStr - Emit visible names into a debug str section.
|
|
///
|
|
void EmitDebugStr() {
|
|
// Check to see if it is worth the effort.
|
|
if (!StringPool.empty()) {
|
|
// Start the dwarf str section.
|
|
Asm->SwitchToDataSection(TAI->getDwarfStrSection());
|
|
|
|
// For each of strings in the string pool.
|
|
for (unsigned StringID = 1, N = StringPool.size();
|
|
StringID <= N; ++StringID) {
|
|
// Emit a label for reference from debug information entries.
|
|
EmitLabel("string", StringID);
|
|
// Emit the string itself.
|
|
const std::string &String = StringPool[StringID];
|
|
Asm->EmitString(String); Asm->EOL();
|
|
}
|
|
|
|
Asm->EOL();
|
|
}
|
|
}
|
|
|
|
/// EmitDebugLoc - Emit visible names into a debug loc section.
|
|
///
|
|
void EmitDebugLoc() {
|
|
// Start the dwarf loc section.
|
|
Asm->SwitchToDataSection(TAI->getDwarfLocSection());
|
|
|
|
Asm->EOL();
|
|
}
|
|
|
|
/// EmitDebugARanges - Emit visible names into a debug aranges section.
|
|
///
|
|
void EmitDebugARanges() {
|
|
// Start the dwarf aranges section.
|
|
Asm->SwitchToDataSection(TAI->getDwarfARangesSection());
|
|
|
|
// FIXME - Mock up
|
|
#if 0
|
|
CompileUnit *Unit = GetBaseCompileUnit();
|
|
|
|
// Don't include size of length
|
|
Asm->EmitInt32(0x1c); Asm->EOL("Length of Address Ranges Info");
|
|
|
|
Asm->EmitInt16(DWARF_VERSION); Asm->EOL("Dwarf Version");
|
|
|
|
EmitReference("info_begin", Unit->getID());
|
|
Asm->EOL("Offset of Compilation Unit Info");
|
|
|
|
Asm->EmitInt8(TD->getPointerSize()); Asm->EOL("Size of Address");
|
|
|
|
Asm->EmitInt8(0); Asm->EOL("Size of Segment Descriptor");
|
|
|
|
Asm->EmitInt16(0); Asm->EOL("Pad (1)");
|
|
Asm->EmitInt16(0); Asm->EOL("Pad (2)");
|
|
|
|
// Range 1
|
|
EmitReference("text_begin", 0); Asm->EOL("Address");
|
|
EmitDifference("text_end", 0, "text_begin", 0, true); Asm->EOL("Length");
|
|
|
|
Asm->EmitInt32(0); Asm->EOL("EOM (1)");
|
|
Asm->EmitInt32(0); Asm->EOL("EOM (2)");
|
|
#endif
|
|
|
|
Asm->EOL();
|
|
}
|
|
|
|
/// EmitDebugRanges - Emit visible names into a debug ranges section.
|
|
///
|
|
void EmitDebugRanges() {
|
|
// Start the dwarf ranges section.
|
|
Asm->SwitchToDataSection(TAI->getDwarfRangesSection());
|
|
|
|
Asm->EOL();
|
|
}
|
|
|
|
/// EmitDebugMacInfo - Emit visible names into a debug macinfo section.
|
|
///
|
|
void EmitDebugMacInfo() {
|
|
if (TAI->doesSupportMacInfoSection()) {
|
|
// Start the dwarf macinfo section.
|
|
Asm->SwitchToDataSection(TAI->getDwarfMacInfoSection());
|
|
|
|
Asm->EOL();
|
|
}
|
|
}
|
|
|
|
/// GetOrCreateSourceID - Look up the source id with the given directory and
|
|
/// source file names. If none currently exists, create a new id and insert it
|
|
/// in the SourceIds map. This can update DirectoryNames and SourceFileNames maps
|
|
/// as well.
|
|
unsigned GetOrCreateSourceID(const std::string &DirName,
|
|
const std::string &FileName) {
|
|
unsigned DId;
|
|
StringMap<unsigned>::iterator DI = DirectoryIdMap.find(DirName);
|
|
if (DI != DirectoryIdMap.end()) {
|
|
DId = DI->getValue();
|
|
} else {
|
|
DId = DirectoryNames.size() + 1;
|
|
DirectoryIdMap[DirName] = DId;
|
|
DirectoryNames.push_back(DirName);
|
|
}
|
|
|
|
unsigned FId;
|
|
StringMap<unsigned>::iterator FI = SourceFileIdMap.find(FileName);
|
|
if (FI != SourceFileIdMap.end()) {
|
|
FId = FI->getValue();
|
|
} else {
|
|
FId = SourceFileNames.size() + 1;
|
|
SourceFileIdMap[FileName] = FId;
|
|
SourceFileNames.push_back(FileName);
|
|
}
|
|
|
|
DenseMap<std::pair<unsigned, unsigned>, unsigned>::iterator SI =
|
|
SourceIdMap.find(std::make_pair(DId, FId));
|
|
if (SI != SourceIdMap.end())
|
|
return SI->second;
|
|
|
|
unsigned SrcId = SourceIds.size() + 1; // DW_AT_decl_file cannot be 0.
|
|
SourceIdMap[std::make_pair(DId, FId)] = SrcId;
|
|
SourceIds.push_back(std::make_pair(DId, FId));
|
|
|
|
return SrcId;
|
|
}
|
|
|
|
void ConstructCompileUnit(GlobalVariable *GV) {
|
|
DICompileUnit DIUnit(GV);
|
|
std::string Dir, FN, Prod;
|
|
unsigned ID = GetOrCreateSourceID(DIUnit.getDirectory(Dir),
|
|
DIUnit.getFilename(FN));
|
|
|
|
DIE *Die = new DIE(DW_TAG_compile_unit);
|
|
AddSectionOffset(Die, DW_AT_stmt_list, DW_FORM_data4,
|
|
DWLabel("section_line", 0), DWLabel("section_line", 0),
|
|
false);
|
|
AddString(Die, DW_AT_producer, DW_FORM_string, DIUnit.getProducer(Prod));
|
|
AddUInt(Die, DW_AT_language, DW_FORM_data1, DIUnit.getLanguage());
|
|
AddString(Die, DW_AT_name, DW_FORM_string, FN);
|
|
if (!Dir.empty())
|
|
AddString(Die, DW_AT_comp_dir, DW_FORM_string, Dir);
|
|
if (DIUnit.isOptimized())
|
|
AddUInt(Die, DW_AT_APPLE_optimized, DW_FORM_flag, 1);
|
|
std::string Flags;
|
|
DIUnit.getFlags(Flags);
|
|
if (!Flags.empty())
|
|
AddString(Die, DW_AT_APPLE_flags, DW_FORM_string, Flags);
|
|
unsigned RVer = DIUnit.getRunTimeVersion();
|
|
if (RVer)
|
|
AddUInt(Die, DW_AT_APPLE_major_runtime_vers, DW_FORM_data1, RVer);
|
|
|
|
CompileUnit *Unit = new CompileUnit(ID, Die);
|
|
if (DIUnit.isMain()) {
|
|
assert(!MainCU && "Multiple main compile units are found!");
|
|
MainCU = Unit;
|
|
}
|
|
CompileUnitMap[DIUnit.getGV()] = Unit;
|
|
CompileUnits.push_back(Unit);
|
|
}
|
|
|
|
/// ConstructCompileUnits - Create a compile unit DIEs.
|
|
void ConstructCompileUnits() {
|
|
GlobalVariable *Root = M->getGlobalVariable("llvm.dbg.compile_units");
|
|
if (!Root)
|
|
return;
|
|
assert(Root->hasLinkOnceLinkage() && Root->hasOneUse() &&
|
|
"Malformed compile unit descriptor anchor type");
|
|
Constant *RootC = cast<Constant>(*Root->use_begin());
|
|
assert(RootC->hasNUsesOrMore(1) &&
|
|
"Malformed compile unit descriptor anchor type");
|
|
for (Value::use_iterator UI = RootC->use_begin(), UE = Root->use_end();
|
|
UI != UE; ++UI)
|
|
for (Value::use_iterator UUI = UI->use_begin(), UUE = UI->use_end();
|
|
UUI != UUE; ++UUI) {
|
|
GlobalVariable *GV = cast<GlobalVariable>(*UUI);
|
|
ConstructCompileUnit(GV);
|
|
}
|
|
}
|
|
|
|
bool ConstructGlobalVariableDIE(GlobalVariable *GV) {
|
|
DIGlobalVariable DI_GV(GV);
|
|
CompileUnit *DW_Unit = MainCU;
|
|
if (!DW_Unit)
|
|
DW_Unit = FindCompileUnit(DI_GV.getCompileUnit());
|
|
|
|
// Check for pre-existence.
|
|
DIE *&Slot = DW_Unit->getDieMapSlotFor(DI_GV.getGV());
|
|
if (Slot)
|
|
return false;
|
|
|
|
DIE *VariableDie = CreateGlobalVariableDIE(DW_Unit, DI_GV);
|
|
|
|
// Add address.
|
|
DIEBlock *Block = new DIEBlock();
|
|
AddUInt(Block, 0, DW_FORM_data1, DW_OP_addr);
|
|
AddObjectLabel(Block, 0, DW_FORM_udata,
|
|
Asm->getGlobalLinkName(DI_GV.getGlobal()));
|
|
AddBlock(VariableDie, DW_AT_location, 0, Block);
|
|
|
|
// Add to map.
|
|
Slot = VariableDie;
|
|
// Add to context owner.
|
|
DW_Unit->getDie()->AddChild(VariableDie);
|
|
// Expose as global. FIXME - need to check external flag.
|
|
std::string Name;
|
|
DW_Unit->AddGlobal(DI_GV.getName(Name), VariableDie);
|
|
return true;
|
|
}
|
|
|
|
/// ConstructGlobalVariableDIEs - Create DIEs for each of the externally
|
|
/// visible global variables. Return true if at least one global DIE is
|
|
/// created.
|
|
bool ConstructGlobalVariableDIEs() {
|
|
GlobalVariable *Root = M->getGlobalVariable("llvm.dbg.global_variables");
|
|
if (!Root)
|
|
return false;
|
|
|
|
assert(Root->hasLinkOnceLinkage() && Root->hasOneUse() &&
|
|
"Malformed global variable descriptor anchor type");
|
|
Constant *RootC = cast<Constant>(*Root->use_begin());
|
|
assert(RootC->hasNUsesOrMore(1) &&
|
|
"Malformed global variable descriptor anchor type");
|
|
|
|
bool Result = false;
|
|
for (Value::use_iterator UI = RootC->use_begin(), UE = Root->use_end();
|
|
UI != UE; ++UI)
|
|
for (Value::use_iterator UUI = UI->use_begin(), UUE = UI->use_end();
|
|
UUI != UUE; ++UUI) {
|
|
GlobalVariable *GV = cast<GlobalVariable>(*UUI);
|
|
Result |= ConstructGlobalVariableDIE(GV);
|
|
}
|
|
return Result;
|
|
}
|
|
|
|
bool ConstructSubprogram(GlobalVariable *GV) {
|
|
DISubprogram SP(GV);
|
|
CompileUnit *Unit = MainCU;
|
|
if (!Unit)
|
|
Unit = FindCompileUnit(SP.getCompileUnit());
|
|
|
|
// Check for pre-existence.
|
|
DIE *&Slot = Unit->getDieMapSlotFor(GV);
|
|
if (Slot)
|
|
return false;
|
|
|
|
if (!SP.isDefinition())
|
|
// This is a method declaration which will be handled while
|
|
// constructing class type.
|
|
return false;
|
|
|
|
DIE *SubprogramDie = CreateSubprogramDIE(Unit, SP);
|
|
|
|
// Add to map.
|
|
Slot = SubprogramDie;
|
|
// Add to context owner.
|
|
Unit->getDie()->AddChild(SubprogramDie);
|
|
// Expose as global.
|
|
std::string Name;
|
|
Unit->AddGlobal(SP.getName(Name), SubprogramDie);
|
|
return true;
|
|
}
|
|
|
|
/// ConstructSubprograms - Create DIEs for each of the externally visible
|
|
/// subprograms. Return true if at least one subprogram DIE is created.
|
|
bool ConstructSubprograms() {
|
|
GlobalVariable *Root = M->getGlobalVariable("llvm.dbg.subprograms");
|
|
if (!Root)
|
|
return false;
|
|
|
|
assert(Root->hasLinkOnceLinkage() && Root->hasOneUse() &&
|
|
"Malformed subprogram descriptor anchor type");
|
|
Constant *RootC = cast<Constant>(*Root->use_begin());
|
|
assert(RootC->hasNUsesOrMore(1) &&
|
|
"Malformed subprogram descriptor anchor type");
|
|
|
|
bool Result = false;
|
|
for (Value::use_iterator UI = RootC->use_begin(), UE = Root->use_end();
|
|
UI != UE; ++UI)
|
|
for (Value::use_iterator UUI = UI->use_begin(), UUE = UI->use_end();
|
|
UUI != UUE; ++UUI) {
|
|
GlobalVariable *GV = cast<GlobalVariable>(*UUI);
|
|
Result |= ConstructSubprogram(GV);
|
|
}
|
|
return Result;
|
|
}
|
|
|
|
public:
|
|
//===--------------------------------------------------------------------===//
|
|
// Main entry points.
|
|
//
|
|
DwarfDebug(raw_ostream &OS, AsmPrinter *A, const TargetAsmInfo *T)
|
|
: Dwarf(OS, A, T, "dbg"), MainCU(0),
|
|
AbbreviationsSet(InitAbbreviationsSetSize), Abbreviations(),
|
|
ValuesSet(InitValuesSetSize), Values(), StringPool(), SectionMap(),
|
|
SectionSourceLines(), didInitial(false), shouldEmit(false),
|
|
RootDbgScope(0), DebugTimer(0) {
|
|
if (TimePassesIsEnabled)
|
|
DebugTimer = new Timer("Dwarf Debug Writer",
|
|
getDwarfTimerGroup());
|
|
}
|
|
virtual ~DwarfDebug() {
|
|
for (unsigned j = 0, M = Values.size(); j < M; ++j)
|
|
delete Values[j];
|
|
|
|
delete DebugTimer;
|
|
}
|
|
|
|
/// ShouldEmitDwarfDebug - Returns true if Dwarf debugging declarations should
|
|
/// be emitted.
|
|
bool ShouldEmitDwarfDebug() const { return shouldEmit; }
|
|
|
|
/// SetDebugInfo - Create global DIEs and emit initial debug info sections.
|
|
/// This is inovked by the target AsmPrinter.
|
|
void SetDebugInfo(MachineModuleInfo *mmi) {
|
|
if (TimePassesIsEnabled)
|
|
DebugTimer->startTimer();
|
|
|
|
// Create all the compile unit DIEs.
|
|
ConstructCompileUnits();
|
|
|
|
if (CompileUnits.empty()) {
|
|
if (TimePassesIsEnabled)
|
|
DebugTimer->stopTimer();
|
|
|
|
return;
|
|
}
|
|
|
|
// Create DIEs for each of the externally visible global variables.
|
|
bool globalDIEs = ConstructGlobalVariableDIEs();
|
|
|
|
// Create DIEs for each of the externally visible subprograms.
|
|
bool subprogramDIEs = ConstructSubprograms();
|
|
|
|
// If there is not any debug info available for any global variables
|
|
// and any subprograms then there is not any debug info to emit.
|
|
if (!globalDIEs && !subprogramDIEs) {
|
|
if (TimePassesIsEnabled)
|
|
DebugTimer->stopTimer();
|
|
|
|
return;
|
|
}
|
|
|
|
MMI = mmi;
|
|
shouldEmit = true;
|
|
MMI->setDebugInfoAvailability(true);
|
|
|
|
// Prime section data.
|
|
SectionMap.insert(TAI->getTextSection());
|
|
|
|
// Print out .file directives to specify files for .loc directives. These
|
|
// are printed out early so that they precede any .loc directives.
|
|
if (TAI->hasDotLocAndDotFile()) {
|
|
for (unsigned i = 1, e = getNumSourceIds()+1; i != e; ++i) {
|
|
// Remember source id starts at 1.
|
|
std::pair<unsigned, unsigned> Id = getSourceDirectoryAndFileIds(i);
|
|
sys::Path FullPath(getSourceDirectoryName(Id.first));
|
|
bool AppendOk =
|
|
FullPath.appendComponent(getSourceFileName(Id.second));
|
|
assert(AppendOk && "Could not append filename to directory!");
|
|
AppendOk = false;
|
|
Asm->EmitFile(i, FullPath.toString());
|
|
Asm->EOL();
|
|
}
|
|
}
|
|
|
|
// Emit initial sections
|
|
EmitInitial();
|
|
|
|
if (TimePassesIsEnabled)
|
|
DebugTimer->stopTimer();
|
|
}
|
|
|
|
/// BeginModule - Emit all Dwarf sections that should come prior to the
|
|
/// content.
|
|
void BeginModule(Module *M) {
|
|
this->M = M;
|
|
}
|
|
|
|
/// EndModule - Emit all Dwarf sections that should come after the content.
|
|
///
|
|
void EndModule() {
|
|
if (!ShouldEmitDwarfDebug())
|
|
return;
|
|
|
|
if (TimePassesIsEnabled)
|
|
DebugTimer->startTimer();
|
|
|
|
// Standard sections final addresses.
|
|
Asm->SwitchToSection(TAI->getTextSection());
|
|
EmitLabel("text_end", 0);
|
|
Asm->SwitchToSection(TAI->getDataSection());
|
|
EmitLabel("data_end", 0);
|
|
|
|
// End text sections.
|
|
for (unsigned i = 1, N = SectionMap.size(); i <= N; ++i) {
|
|
Asm->SwitchToSection(SectionMap[i]);
|
|
EmitLabel("section_end", i);
|
|
}
|
|
|
|
// Emit common frame information.
|
|
EmitCommonDebugFrame();
|
|
|
|
// Emit function debug frame information
|
|
for (std::vector<FunctionDebugFrameInfo>::iterator I = DebugFrames.begin(),
|
|
E = DebugFrames.end(); I != E; ++I)
|
|
EmitFunctionDebugFrame(*I);
|
|
|
|
// Compute DIE offsets and sizes.
|
|
SizeAndOffsets();
|
|
|
|
// Emit all the DIEs into a debug info section
|
|
EmitDebugInfo();
|
|
|
|
// Corresponding abbreviations into a abbrev section.
|
|
EmitAbbreviations();
|
|
|
|
// Emit source line correspondence into a debug line section.
|
|
EmitDebugLines();
|
|
|
|
// Emit info into a debug pubnames section.
|
|
EmitDebugPubNames();
|
|
|
|
// Emit info into a debug str section.
|
|
EmitDebugStr();
|
|
|
|
// Emit info into a debug loc section.
|
|
EmitDebugLoc();
|
|
|
|
// Emit info into a debug aranges section.
|
|
EmitDebugARanges();
|
|
|
|
// Emit info into a debug ranges section.
|
|
EmitDebugRanges();
|
|
|
|
// Emit info into a debug macinfo section.
|
|
EmitDebugMacInfo();
|
|
|
|
if (TimePassesIsEnabled)
|
|
DebugTimer->stopTimer();
|
|
}
|
|
|
|
/// BeginFunction - Gather pre-function debug information. Assumes being
|
|
/// emitted immediately after the function entry point.
|
|
void BeginFunction(MachineFunction *MF) {
|
|
this->MF = MF;
|
|
|
|
if (!ShouldEmitDwarfDebug()) return;
|
|
|
|
if (TimePassesIsEnabled)
|
|
DebugTimer->startTimer();
|
|
|
|
// Begin accumulating function debug information.
|
|
MMI->BeginFunction(MF);
|
|
|
|
// Assumes in correct section after the entry point.
|
|
EmitLabel("func_begin", ++SubprogramCount);
|
|
|
|
// Emit label for the implicitly defined dbg.stoppoint at the start of
|
|
// the function.
|
|
if (!Lines.empty()) {
|
|
const SrcLineInfo &LineInfo = Lines[0];
|
|
Asm->printLabel(LineInfo.getLabelID());
|
|
}
|
|
|
|
if (TimePassesIsEnabled)
|
|
DebugTimer->stopTimer();
|
|
}
|
|
|
|
/// EndFunction - Gather and emit post-function debug information.
|
|
///
|
|
void EndFunction(MachineFunction *MF) {
|
|
if (!ShouldEmitDwarfDebug()) return;
|
|
|
|
if (TimePassesIsEnabled)
|
|
DebugTimer->startTimer();
|
|
|
|
// Define end label for subprogram.
|
|
EmitLabel("func_end", SubprogramCount);
|
|
|
|
// Get function line info.
|
|
if (!Lines.empty()) {
|
|
// Get section line info.
|
|
unsigned ID = SectionMap.insert(Asm->CurrentSection_);
|
|
if (SectionSourceLines.size() < ID) SectionSourceLines.resize(ID);
|
|
std::vector<SrcLineInfo> &SectionLineInfos = SectionSourceLines[ID-1];
|
|
// Append the function info to section info.
|
|
SectionLineInfos.insert(SectionLineInfos.end(),
|
|
Lines.begin(), Lines.end());
|
|
}
|
|
|
|
// Construct scopes for subprogram.
|
|
if (RootDbgScope)
|
|
ConstructRootDbgScope(RootDbgScope);
|
|
else
|
|
// FIXME: This is wrong. We are essentially getting past a problem with
|
|
// debug information not being able to handle unreachable blocks that have
|
|
// debug information in them. In particular, those unreachable blocks that
|
|
// have "region end" info in them. That situation results in the "root
|
|
// scope" not being created. If that's the case, then emit a "default"
|
|
// scope, i.e., one that encompasses the whole function. This isn't
|
|
// desirable. And a better way of handling this (and all of the debugging
|
|
// information) needs to be explored.
|
|
ConstructDefaultDbgScope(MF);
|
|
|
|
DebugFrames.push_back(FunctionDebugFrameInfo(SubprogramCount,
|
|
MMI->getFrameMoves()));
|
|
|
|
// Clear debug info
|
|
if (RootDbgScope) {
|
|
delete RootDbgScope;
|
|
DbgScopeMap.clear();
|
|
RootDbgScope = NULL;
|
|
}
|
|
|
|
Lines.clear();
|
|
|
|
if (TimePassesIsEnabled)
|
|
DebugTimer->stopTimer();
|
|
}
|
|
|
|
/// ValidDebugInfo - Return true if V represents valid debug info value.
|
|
bool ValidDebugInfo(Value *V) {
|
|
if (!V)
|
|
return false;
|
|
|
|
if (!shouldEmit)
|
|
return false;
|
|
|
|
GlobalVariable *GV = getGlobalVariable(V);
|
|
if (!GV)
|
|
return false;
|
|
|
|
if (!GV->hasInternalLinkage () && !GV->hasLinkOnceLinkage())
|
|
return false;
|
|
|
|
if (TimePassesIsEnabled)
|
|
DebugTimer->startTimer();
|
|
|
|
DIDescriptor DI(GV);
|
|
|
|
// Check current version. Allow Version6 for now.
|
|
unsigned Version = DI.getVersion();
|
|
if (Version != LLVMDebugVersion && Version != LLVMDebugVersion6) {
|
|
if (TimePassesIsEnabled)
|
|
DebugTimer->stopTimer();
|
|
|
|
return false;
|
|
}
|
|
|
|
unsigned Tag = DI.getTag();
|
|
switch (Tag) {
|
|
case DW_TAG_variable:
|
|
assert(DIVariable(GV).Verify() && "Invalid DebugInfo value");
|
|
break;
|
|
case DW_TAG_compile_unit:
|
|
assert(DICompileUnit(GV).Verify() && "Invalid DebugInfo value");
|
|
break;
|
|
case DW_TAG_subprogram:
|
|
assert(DISubprogram(GV).Verify() && "Invalid DebugInfo value");
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
if (TimePassesIsEnabled)
|
|
DebugTimer->stopTimer();
|
|
|
|
return true;
|
|
}
|
|
|
|
/// RecordSourceLine - Records location information and associates it with a
|
|
/// label. Returns a unique label ID used to generate a label and provide
|
|
/// correspondence to the source line list.
|
|
unsigned RecordSourceLine(Value *V, unsigned Line, unsigned Col) {
|
|
if (TimePassesIsEnabled)
|
|
DebugTimer->startTimer();
|
|
|
|
CompileUnit *Unit = CompileUnitMap[V];
|
|
assert(Unit && "Unable to find CompileUnit");
|
|
unsigned ID = MMI->NextLabelID();
|
|
Lines.push_back(SrcLineInfo(Line, Col, Unit->getID(), ID));
|
|
|
|
if (TimePassesIsEnabled)
|
|
DebugTimer->stopTimer();
|
|
|
|
return ID;
|
|
}
|
|
|
|
/// RecordSourceLine - Records location information and associates it with a
|
|
/// label. Returns a unique label ID used to generate a label and provide
|
|
/// correspondence to the source line list.
|
|
unsigned RecordSourceLine(unsigned Line, unsigned Col, unsigned Src) {
|
|
if (TimePassesIsEnabled)
|
|
DebugTimer->startTimer();
|
|
|
|
unsigned ID = MMI->NextLabelID();
|
|
Lines.push_back(SrcLineInfo(Line, Col, Src, ID));
|
|
|
|
if (TimePassesIsEnabled)
|
|
DebugTimer->stopTimer();
|
|
|
|
return ID;
|
|
}
|
|
|
|
/// getRecordSourceLineCount - Return the number of source lines in the debug
|
|
/// info.
|
|
unsigned getRecordSourceLineCount() const {
|
|
return Lines.size();
|
|
}
|
|
|
|
/// getOrCreateSourceID - Public version of GetOrCreateSourceID. This can be
|
|
/// timed. Look up the source id with the given directory and source file
|
|
/// names. If none currently exists, create a new id and insert it in the
|
|
/// SourceIds map. This can update DirectoryNames and SourceFileNames maps as
|
|
/// well.
|
|
unsigned getOrCreateSourceID(const std::string &DirName,
|
|
const std::string &FileName) {
|
|
if (TimePassesIsEnabled)
|
|
DebugTimer->startTimer();
|
|
|
|
unsigned SrcId = GetOrCreateSourceID(DirName, FileName);
|
|
|
|
if (TimePassesIsEnabled)
|
|
DebugTimer->stopTimer();
|
|
|
|
return SrcId;
|
|
}
|
|
|
|
/// RecordRegionStart - Indicate the start of a region.
|
|
unsigned RecordRegionStart(GlobalVariable *V) {
|
|
if (TimePassesIsEnabled)
|
|
DebugTimer->startTimer();
|
|
|
|
DbgScope *Scope = getOrCreateScope(V);
|
|
unsigned ID = MMI->NextLabelID();
|
|
if (!Scope->getStartLabelID()) Scope->setStartLabelID(ID);
|
|
|
|
if (TimePassesIsEnabled)
|
|
DebugTimer->stopTimer();
|
|
|
|
return ID;
|
|
}
|
|
|
|
/// RecordRegionEnd - Indicate the end of a region.
|
|
unsigned RecordRegionEnd(GlobalVariable *V) {
|
|
if (TimePassesIsEnabled)
|
|
DebugTimer->startTimer();
|
|
|
|
DbgScope *Scope = getOrCreateScope(V);
|
|
unsigned ID = MMI->NextLabelID();
|
|
Scope->setEndLabelID(ID);
|
|
|
|
if (TimePassesIsEnabled)
|
|
DebugTimer->stopTimer();
|
|
|
|
return ID;
|
|
}
|
|
|
|
/// RecordVariable - Indicate the declaration of a local variable.
|
|
void RecordVariable(GlobalVariable *GV, unsigned FrameIndex) {
|
|
if (TimePassesIsEnabled)
|
|
DebugTimer->startTimer();
|
|
|
|
DIDescriptor Desc(GV);
|
|
DbgScope *Scope = NULL;
|
|
|
|
if (Desc.getTag() == DW_TAG_variable) {
|
|
// GV is a global variable.
|
|
DIGlobalVariable DG(GV);
|
|
Scope = getOrCreateScope(DG.getContext().getGV());
|
|
} else {
|
|
// or GV is a local variable.
|
|
DIVariable DV(GV);
|
|
Scope = getOrCreateScope(DV.getContext().getGV());
|
|
}
|
|
|
|
assert(Scope && "Unable to find variable' scope");
|
|
DbgVariable *DV = new DbgVariable(DIVariable(GV), FrameIndex);
|
|
Scope->AddVariable(DV);
|
|
|
|
if (TimePassesIsEnabled)
|
|
DebugTimer->stopTimer();
|
|
}
|
|
};
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
/// DwarfException - Emits Dwarf exception handling directives.
|
|
///
|
|
class DwarfException : public Dwarf {
|
|
struct FunctionEHFrameInfo {
|
|
std::string FnName;
|
|
unsigned Number;
|
|
unsigned PersonalityIndex;
|
|
bool hasCalls;
|
|
bool hasLandingPads;
|
|
std::vector<MachineMove> Moves;
|
|
const Function * function;
|
|
|
|
FunctionEHFrameInfo(const std::string &FN, unsigned Num, unsigned P,
|
|
bool hC, bool hL,
|
|
const std::vector<MachineMove> &M,
|
|
const Function *f):
|
|
FnName(FN), Number(Num), PersonalityIndex(P),
|
|
hasCalls(hC), hasLandingPads(hL), Moves(M), function (f) { }
|
|
};
|
|
|
|
std::vector<FunctionEHFrameInfo> EHFrames;
|
|
|
|
/// shouldEmitTable - Per-function flag to indicate if EH tables should
|
|
/// be emitted.
|
|
bool shouldEmitTable;
|
|
|
|
/// shouldEmitMoves - Per-function flag to indicate if frame moves info
|
|
/// should be emitted.
|
|
bool shouldEmitMoves;
|
|
|
|
/// shouldEmitTableModule - Per-module flag to indicate if EH tables
|
|
/// should be emitted.
|
|
bool shouldEmitTableModule;
|
|
|
|
/// shouldEmitFrameModule - Per-module flag to indicate if frame moves
|
|
/// should be emitted.
|
|
bool shouldEmitMovesModule;
|
|
|
|
/// ExceptionTimer - Timer for the Dwarf exception writer.
|
|
Timer *ExceptionTimer;
|
|
|
|
/// EmitCommonEHFrame - Emit the common eh unwind frame.
|
|
///
|
|
void EmitCommonEHFrame(const Function *Personality, unsigned Index) {
|
|
// Size and sign of stack growth.
|
|
int stackGrowth =
|
|
Asm->TM.getFrameInfo()->getStackGrowthDirection() ==
|
|
TargetFrameInfo::StackGrowsUp ?
|
|
TD->getPointerSize() : -TD->getPointerSize();
|
|
|
|
// Begin eh frame section.
|
|
Asm->SwitchToTextSection(TAI->getDwarfEHFrameSection());
|
|
|
|
if (!TAI->doesRequireNonLocalEHFrameLabel())
|
|
O << TAI->getEHGlobalPrefix();
|
|
O << "EH_frame" << Index << ":\n";
|
|
EmitLabel("section_eh_frame", Index);
|
|
|
|
// Define base labels.
|
|
EmitLabel("eh_frame_common", Index);
|
|
|
|
// Define the eh frame length.
|
|
EmitDifference("eh_frame_common_end", Index,
|
|
"eh_frame_common_begin", Index, true);
|
|
Asm->EOL("Length of Common Information Entry");
|
|
|
|
// EH frame header.
|
|
EmitLabel("eh_frame_common_begin", Index);
|
|
Asm->EmitInt32((int)0);
|
|
Asm->EOL("CIE Identifier Tag");
|
|
Asm->EmitInt8(DW_CIE_VERSION);
|
|
Asm->EOL("CIE Version");
|
|
|
|
// The personality presence indicates that language specific information
|
|
// will show up in the eh frame.
|
|
Asm->EmitString(Personality ? "zPLR" : "zR");
|
|
Asm->EOL("CIE Augmentation");
|
|
|
|
// Round out reader.
|
|
Asm->EmitULEB128Bytes(1);
|
|
Asm->EOL("CIE Code Alignment Factor");
|
|
Asm->EmitSLEB128Bytes(stackGrowth);
|
|
Asm->EOL("CIE Data Alignment Factor");
|
|
Asm->EmitInt8(RI->getDwarfRegNum(RI->getRARegister(), true));
|
|
Asm->EOL("CIE Return Address Column");
|
|
|
|
// If there is a personality, we need to indicate the functions location.
|
|
if (Personality) {
|
|
Asm->EmitULEB128Bytes(7);
|
|
Asm->EOL("Augmentation Size");
|
|
|
|
if (TAI->getNeedsIndirectEncoding()) {
|
|
Asm->EmitInt8(DW_EH_PE_pcrel | DW_EH_PE_sdata4 | DW_EH_PE_indirect);
|
|
Asm->EOL("Personality (pcrel sdata4 indirect)");
|
|
} else {
|
|
Asm->EmitInt8(DW_EH_PE_pcrel | DW_EH_PE_sdata4);
|
|
Asm->EOL("Personality (pcrel sdata4)");
|
|
}
|
|
|
|
PrintRelDirective(true);
|
|
O << TAI->getPersonalityPrefix();
|
|
Asm->EmitExternalGlobal((const GlobalVariable *)(Personality));
|
|
O << TAI->getPersonalitySuffix();
|
|
if (strcmp(TAI->getPersonalitySuffix(), "+4@GOTPCREL"))
|
|
O << "-" << TAI->getPCSymbol();
|
|
Asm->EOL("Personality");
|
|
|
|
Asm->EmitInt8(DW_EH_PE_pcrel | DW_EH_PE_sdata4);
|
|
Asm->EOL("LSDA Encoding (pcrel sdata4)");
|
|
|
|
Asm->EmitInt8(DW_EH_PE_pcrel | DW_EH_PE_sdata4);
|
|
Asm->EOL("FDE Encoding (pcrel sdata4)");
|
|
} else {
|
|
Asm->EmitULEB128Bytes(1);
|
|
Asm->EOL("Augmentation Size");
|
|
|
|
Asm->EmitInt8(DW_EH_PE_pcrel | DW_EH_PE_sdata4);
|
|
Asm->EOL("FDE Encoding (pcrel sdata4)");
|
|
}
|
|
|
|
// Indicate locations of general callee saved registers in frame.
|
|
std::vector<MachineMove> Moves;
|
|
RI->getInitialFrameState(Moves);
|
|
EmitFrameMoves(NULL, 0, Moves, true);
|
|
|
|
// On Darwin the linker honors the alignment of eh_frame, which means it
|
|
// must be 8-byte on 64-bit targets to match what gcc does. Otherwise
|
|
// you get holes which confuse readers of eh_frame.
|
|
Asm->EmitAlignment(TD->getPointerSize() == sizeof(int32_t) ? 2 : 3,
|
|
0, 0, false);
|
|
EmitLabel("eh_frame_common_end", Index);
|
|
|
|
Asm->EOL();
|
|
}
|
|
|
|
/// EmitEHFrame - Emit function exception frame information.
|
|
///
|
|
void EmitEHFrame(const FunctionEHFrameInfo &EHFrameInfo) {
|
|
Function::LinkageTypes linkage = EHFrameInfo.function->getLinkage();
|
|
|
|
Asm->SwitchToTextSection(TAI->getDwarfEHFrameSection());
|
|
|
|
// Externally visible entry into the functions eh frame info.
|
|
// If the corresponding function is static, this should not be
|
|
// externally visible.
|
|
if (linkage != Function::InternalLinkage &&
|
|
linkage != Function::PrivateLinkage) {
|
|
if (const char *GlobalEHDirective = TAI->getGlobalEHDirective())
|
|
O << GlobalEHDirective << EHFrameInfo.FnName << "\n";
|
|
}
|
|
|
|
// If corresponding function is weak definition, this should be too.
|
|
if ((linkage == Function::WeakAnyLinkage ||
|
|
linkage == Function::WeakODRLinkage ||
|
|
linkage == Function::LinkOnceAnyLinkage ||
|
|
linkage == Function::LinkOnceODRLinkage) &&
|
|
TAI->getWeakDefDirective())
|
|
O << TAI->getWeakDefDirective() << EHFrameInfo.FnName << "\n";
|
|
|
|
// If there are no calls then you can't unwind. This may mean we can
|
|
// omit the EH Frame, but some environments do not handle weak absolute
|
|
// symbols.
|
|
// If UnwindTablesMandatory is set we cannot do this optimization; the
|
|
// unwind info is to be available for non-EH uses.
|
|
if (!EHFrameInfo.hasCalls &&
|
|
!UnwindTablesMandatory &&
|
|
((linkage != Function::WeakAnyLinkage &&
|
|
linkage != Function::WeakODRLinkage &&
|
|
linkage != Function::LinkOnceAnyLinkage &&
|
|
linkage != Function::LinkOnceODRLinkage) ||
|
|
!TAI->getWeakDefDirective() ||
|
|
TAI->getSupportsWeakOmittedEHFrame()))
|
|
{
|
|
O << EHFrameInfo.FnName << " = 0\n";
|
|
// This name has no connection to the function, so it might get
|
|
// dead-stripped when the function is not, erroneously. Prohibit
|
|
// dead-stripping unconditionally.
|
|
if (const char *UsedDirective = TAI->getUsedDirective())
|
|
O << UsedDirective << EHFrameInfo.FnName << "\n\n";
|
|
} else {
|
|
O << EHFrameInfo.FnName << ":\n";
|
|
|
|
// EH frame header.
|
|
EmitDifference("eh_frame_end", EHFrameInfo.Number,
|
|
"eh_frame_begin", EHFrameInfo.Number, true);
|
|
Asm->EOL("Length of Frame Information Entry");
|
|
|
|
EmitLabel("eh_frame_begin", EHFrameInfo.Number);
|
|
|
|
if (TAI->doesRequireNonLocalEHFrameLabel()) {
|
|
PrintRelDirective(true, true);
|
|
PrintLabelName("eh_frame_begin", EHFrameInfo.Number);
|
|
|
|
if (!TAI->isAbsoluteEHSectionOffsets())
|
|
O << "-EH_frame" << EHFrameInfo.PersonalityIndex;
|
|
} else {
|
|
EmitSectionOffset("eh_frame_begin", "eh_frame_common",
|
|
EHFrameInfo.Number, EHFrameInfo.PersonalityIndex,
|
|
true, true, false);
|
|
}
|
|
|
|
Asm->EOL("FDE CIE offset");
|
|
|
|
EmitReference("eh_func_begin", EHFrameInfo.Number, true, true);
|
|
Asm->EOL("FDE initial location");
|
|
EmitDifference("eh_func_end", EHFrameInfo.Number,
|
|
"eh_func_begin", EHFrameInfo.Number, true);
|
|
Asm->EOL("FDE address range");
|
|
|
|
// If there is a personality and landing pads then point to the language
|
|
// specific data area in the exception table.
|
|
if (EHFrameInfo.PersonalityIndex) {
|
|
Asm->EmitULEB128Bytes(4);
|
|
Asm->EOL("Augmentation size");
|
|
|
|
if (EHFrameInfo.hasLandingPads)
|
|
EmitReference("exception", EHFrameInfo.Number, true, true);
|
|
else
|
|
Asm->EmitInt32((int)0);
|
|
Asm->EOL("Language Specific Data Area");
|
|
} else {
|
|
Asm->EmitULEB128Bytes(0);
|
|
Asm->EOL("Augmentation size");
|
|
}
|
|
|
|
// Indicate locations of function specific callee saved registers in
|
|
// frame.
|
|
EmitFrameMoves("eh_func_begin", EHFrameInfo.Number, EHFrameInfo.Moves,
|
|
true);
|
|
|
|
// On Darwin the linker honors the alignment of eh_frame, which means it
|
|
// must be 8-byte on 64-bit targets to match what gcc does. Otherwise
|
|
// you get holes which confuse readers of eh_frame.
|
|
Asm->EmitAlignment(TD->getPointerSize() == sizeof(int32_t) ? 2 : 3,
|
|
0, 0, false);
|
|
EmitLabel("eh_frame_end", EHFrameInfo.Number);
|
|
|
|
// If the function is marked used, this table should be also. We cannot
|
|
// make the mark unconditional in this case, since retaining the table
|
|
// also retains the function in this case, and there is code around
|
|
// that depends on unused functions (calling undefined externals) being
|
|
// dead-stripped to link correctly. Yes, there really is.
|
|
if (MMI->getUsedFunctions().count(EHFrameInfo.function))
|
|
if (const char *UsedDirective = TAI->getUsedDirective())
|
|
O << UsedDirective << EHFrameInfo.FnName << "\n\n";
|
|
}
|
|
}
|
|
|
|
/// EmitExceptionTable - Emit landing pads and actions.
|
|
///
|
|
/// The general organization of the table is complex, but the basic concepts
|
|
/// are easy. First there is a header which describes the location and
|
|
/// organization of the three components that follow.
|
|
/// 1. The landing pad site information describes the range of code covered
|
|
/// by the try. In our case it's an accumulation of the ranges covered
|
|
/// by the invokes in the try. There is also a reference to the landing
|
|
/// pad that handles the exception once processed. Finally an index into
|
|
/// the actions table.
|
|
/// 2. The action table, in our case, is composed of pairs of type ids
|
|
/// and next action offset. Starting with the action index from the
|
|
/// landing pad site, each type Id is checked for a match to the current
|
|
/// exception. If it matches then the exception and type id are passed
|
|
/// on to the landing pad. Otherwise the next action is looked up. This
|
|
/// chain is terminated with a next action of zero. If no type id is
|
|
/// found the the frame is unwound and handling continues.
|
|
/// 3. Type id table contains references to all the C++ typeinfo for all
|
|
/// catches in the function. This tables is reversed indexed base 1.
|
|
|
|
/// SharedTypeIds - How many leading type ids two landing pads have in common.
|
|
static unsigned SharedTypeIds(const LandingPadInfo *L,
|
|
const LandingPadInfo *R) {
|
|
const std::vector<int> &LIds = L->TypeIds, &RIds = R->TypeIds;
|
|
unsigned LSize = LIds.size(), RSize = RIds.size();
|
|
unsigned MinSize = LSize < RSize ? LSize : RSize;
|
|
unsigned Count = 0;
|
|
|
|
for (; Count != MinSize; ++Count)
|
|
if (LIds[Count] != RIds[Count])
|
|
return Count;
|
|
|
|
return Count;
|
|
}
|
|
|
|
/// PadLT - Order landing pads lexicographically by type id.
|
|
static bool PadLT(const LandingPadInfo *L, const LandingPadInfo *R) {
|
|
const std::vector<int> &LIds = L->TypeIds, &RIds = R->TypeIds;
|
|
unsigned LSize = LIds.size(), RSize = RIds.size();
|
|
unsigned MinSize = LSize < RSize ? LSize : RSize;
|
|
|
|
for (unsigned i = 0; i != MinSize; ++i)
|
|
if (LIds[i] != RIds[i])
|
|
return LIds[i] < RIds[i];
|
|
|
|
return LSize < RSize;
|
|
}
|
|
|
|
struct KeyInfo {
|
|
static inline unsigned getEmptyKey() { return -1U; }
|
|
static inline unsigned getTombstoneKey() { return -2U; }
|
|
static unsigned getHashValue(const unsigned &Key) { return Key; }
|
|
static bool isEqual(unsigned LHS, unsigned RHS) { return LHS == RHS; }
|
|
static bool isPod() { return true; }
|
|
};
|
|
|
|
/// ActionEntry - Structure describing an entry in the actions table.
|
|
struct ActionEntry {
|
|
int ValueForTypeID; // The value to write - may not be equal to the type id.
|
|
int NextAction;
|
|
struct ActionEntry *Previous;
|
|
};
|
|
|
|
/// PadRange - Structure holding a try-range and the associated landing pad.
|
|
struct PadRange {
|
|
// The index of the landing pad.
|
|
unsigned PadIndex;
|
|
// The index of the begin and end labels in the landing pad's label lists.
|
|
unsigned RangeIndex;
|
|
};
|
|
|
|
typedef DenseMap<unsigned, PadRange, KeyInfo> RangeMapType;
|
|
|
|
/// CallSiteEntry - Structure describing an entry in the call-site table.
|
|
struct CallSiteEntry {
|
|
// The 'try-range' is BeginLabel .. EndLabel.
|
|
unsigned BeginLabel; // zero indicates the start of the function.
|
|
unsigned EndLabel; // zero indicates the end of the function.
|
|
// The landing pad starts at PadLabel.
|
|
unsigned PadLabel; // zero indicates that there is no landing pad.
|
|
unsigned Action;
|
|
};
|
|
|
|
void EmitExceptionTable() {
|
|
const std::vector<GlobalVariable *> &TypeInfos = MMI->getTypeInfos();
|
|
const std::vector<unsigned> &FilterIds = MMI->getFilterIds();
|
|
const std::vector<LandingPadInfo> &PadInfos = MMI->getLandingPads();
|
|
if (PadInfos.empty()) return;
|
|
|
|
// Sort the landing pads in order of their type ids. This is used to fold
|
|
// duplicate actions.
|
|
SmallVector<const LandingPadInfo *, 64> LandingPads;
|
|
LandingPads.reserve(PadInfos.size());
|
|
for (unsigned i = 0, N = PadInfos.size(); i != N; ++i)
|
|
LandingPads.push_back(&PadInfos[i]);
|
|
std::sort(LandingPads.begin(), LandingPads.end(), PadLT);
|
|
|
|
// Negative type ids index into FilterIds, positive type ids index into
|
|
// TypeInfos. The value written for a positive type id is just the type
|
|
// id itself. For a negative type id, however, the value written is the
|
|
// (negative) byte offset of the corresponding FilterIds entry. The byte
|
|
// offset is usually equal to the type id, because the FilterIds entries
|
|
// are written using a variable width encoding which outputs one byte per
|
|
// entry as long as the value written is not too large, but can differ.
|
|
// This kind of complication does not occur for positive type ids because
|
|
// type infos are output using a fixed width encoding.
|
|
// FilterOffsets[i] holds the byte offset corresponding to FilterIds[i].
|
|
SmallVector<int, 16> FilterOffsets;
|
|
FilterOffsets.reserve(FilterIds.size());
|
|
int Offset = -1;
|
|
for(std::vector<unsigned>::const_iterator I = FilterIds.begin(),
|
|
E = FilterIds.end(); I != E; ++I) {
|
|
FilterOffsets.push_back(Offset);
|
|
Offset -= TargetAsmInfo::getULEB128Size(*I);
|
|
}
|
|
|
|
// Compute the actions table and gather the first action index for each
|
|
// landing pad site.
|
|
SmallVector<ActionEntry, 32> Actions;
|
|
SmallVector<unsigned, 64> FirstActions;
|
|
FirstActions.reserve(LandingPads.size());
|
|
|
|
int FirstAction = 0;
|
|
unsigned SizeActions = 0;
|
|
for (unsigned i = 0, N = LandingPads.size(); i != N; ++i) {
|
|
const LandingPadInfo *LP = LandingPads[i];
|
|
const std::vector<int> &TypeIds = LP->TypeIds;
|
|
const unsigned NumShared = i ? SharedTypeIds(LP, LandingPads[i-1]) : 0;
|
|
unsigned SizeSiteActions = 0;
|
|
|
|
if (NumShared < TypeIds.size()) {
|
|
unsigned SizeAction = 0;
|
|
ActionEntry *PrevAction = 0;
|
|
|
|
if (NumShared) {
|
|
const unsigned SizePrevIds = LandingPads[i-1]->TypeIds.size();
|
|
assert(Actions.size());
|
|
PrevAction = &Actions.back();
|
|
SizeAction = TargetAsmInfo::getSLEB128Size(PrevAction->NextAction) +
|
|
TargetAsmInfo::getSLEB128Size(PrevAction->ValueForTypeID);
|
|
for (unsigned j = NumShared; j != SizePrevIds; ++j) {
|
|
SizeAction -=
|
|
TargetAsmInfo::getSLEB128Size(PrevAction->ValueForTypeID);
|
|
SizeAction += -PrevAction->NextAction;
|
|
PrevAction = PrevAction->Previous;
|
|
}
|
|
}
|
|
|
|
// Compute the actions.
|
|
for (unsigned I = NumShared, M = TypeIds.size(); I != M; ++I) {
|
|
int TypeID = TypeIds[I];
|
|
assert(-1-TypeID < (int)FilterOffsets.size() && "Unknown filter id!");
|
|
int ValueForTypeID = TypeID < 0 ? FilterOffsets[-1 - TypeID] : TypeID;
|
|
unsigned SizeTypeID = TargetAsmInfo::getSLEB128Size(ValueForTypeID);
|
|
|
|
int NextAction = SizeAction ? -(SizeAction + SizeTypeID) : 0;
|
|
SizeAction = SizeTypeID + TargetAsmInfo::getSLEB128Size(NextAction);
|
|
SizeSiteActions += SizeAction;
|
|
|
|
ActionEntry Action = {ValueForTypeID, NextAction, PrevAction};
|
|
Actions.push_back(Action);
|
|
|
|
PrevAction = &Actions.back();
|
|
}
|
|
|
|
// Record the first action of the landing pad site.
|
|
FirstAction = SizeActions + SizeSiteActions - SizeAction + 1;
|
|
} // else identical - re-use previous FirstAction
|
|
|
|
FirstActions.push_back(FirstAction);
|
|
|
|
// Compute this sites contribution to size.
|
|
SizeActions += SizeSiteActions;
|
|
}
|
|
|
|
// Compute the call-site table. The entry for an invoke has a try-range
|
|
// containing the call, a non-zero landing pad and an appropriate action.
|
|
// The entry for an ordinary call has a try-range containing the call and
|
|
// zero for the landing pad and the action. Calls marked 'nounwind' have
|
|
// no entry and must not be contained in the try-range of any entry - they
|
|
// form gaps in the table. Entries must be ordered by try-range address.
|
|
SmallVector<CallSiteEntry, 64> CallSites;
|
|
|
|
RangeMapType PadMap;
|
|
// Invokes and nounwind calls have entries in PadMap (due to being bracketed
|
|
// by try-range labels when lowered). Ordinary calls do not, so appropriate
|
|
// try-ranges for them need be deduced.
|
|
for (unsigned i = 0, N = LandingPads.size(); i != N; ++i) {
|
|
const LandingPadInfo *LandingPad = LandingPads[i];
|
|
for (unsigned j = 0, E = LandingPad->BeginLabels.size(); j != E; ++j) {
|
|
unsigned BeginLabel = LandingPad->BeginLabels[j];
|
|
assert(!PadMap.count(BeginLabel) && "Duplicate landing pad labels!");
|
|
PadRange P = { i, j };
|
|
PadMap[BeginLabel] = P;
|
|
}
|
|
}
|
|
|
|
// The end label of the previous invoke or nounwind try-range.
|
|
unsigned LastLabel = 0;
|
|
|
|
// Whether there is a potentially throwing instruction (currently this means
|
|
// an ordinary call) between the end of the previous try-range and now.
|
|
bool SawPotentiallyThrowing = false;
|
|
|
|
// Whether the last callsite entry was for an invoke.
|
|
bool PreviousIsInvoke = false;
|
|
|
|
// Visit all instructions in order of address.
|
|
for (MachineFunction::const_iterator I = MF->begin(), E = MF->end();
|
|
I != E; ++I) {
|
|
for (MachineBasicBlock::const_iterator MI = I->begin(), E = I->end();
|
|
MI != E; ++MI) {
|
|
if (!MI->isLabel()) {
|
|
SawPotentiallyThrowing |= MI->getDesc().isCall();
|
|
continue;
|
|
}
|
|
|
|
unsigned BeginLabel = MI->getOperand(0).getImm();
|
|
assert(BeginLabel && "Invalid label!");
|
|
|
|
// End of the previous try-range?
|
|
if (BeginLabel == LastLabel)
|
|
SawPotentiallyThrowing = false;
|
|
|
|
// Beginning of a new try-range?
|
|
RangeMapType::iterator L = PadMap.find(BeginLabel);
|
|
if (L == PadMap.end())
|
|
// Nope, it was just some random label.
|
|
continue;
|
|
|
|
PadRange P = L->second;
|
|
const LandingPadInfo *LandingPad = LandingPads[P.PadIndex];
|
|
|
|
assert(BeginLabel == LandingPad->BeginLabels[P.RangeIndex] &&
|
|
"Inconsistent landing pad map!");
|
|
|
|
// If some instruction between the previous try-range and this one may
|
|
// throw, create a call-site entry with no landing pad for the region
|
|
// between the try-ranges.
|
|
if (SawPotentiallyThrowing) {
|
|
CallSiteEntry Site = {LastLabel, BeginLabel, 0, 0};
|
|
CallSites.push_back(Site);
|
|
PreviousIsInvoke = false;
|
|
}
|
|
|
|
LastLabel = LandingPad->EndLabels[P.RangeIndex];
|
|
assert(BeginLabel && LastLabel && "Invalid landing pad!");
|
|
|
|
if (LandingPad->LandingPadLabel) {
|
|
// This try-range is for an invoke.
|
|
CallSiteEntry Site = {BeginLabel, LastLabel,
|
|
LandingPad->LandingPadLabel, FirstActions[P.PadIndex]};
|
|
|
|
// Try to merge with the previous call-site.
|
|
if (PreviousIsInvoke) {
|
|
CallSiteEntry &Prev = CallSites.back();
|
|
if (Site.PadLabel == Prev.PadLabel && Site.Action == Prev.Action) {
|
|
// Extend the range of the previous entry.
|
|
Prev.EndLabel = Site.EndLabel;
|
|
continue;
|
|
}
|
|
}
|
|
|
|
// Otherwise, create a new call-site.
|
|
CallSites.push_back(Site);
|
|
PreviousIsInvoke = true;
|
|
} else {
|
|
// Create a gap.
|
|
PreviousIsInvoke = false;
|
|
}
|
|
}
|
|
}
|
|
// If some instruction between the previous try-range and the end of the
|
|
// function may throw, create a call-site entry with no landing pad for the
|
|
// region following the try-range.
|
|
if (SawPotentiallyThrowing) {
|
|
CallSiteEntry Site = {LastLabel, 0, 0, 0};
|
|
CallSites.push_back(Site);
|
|
}
|
|
|
|
// Final tallies.
|
|
|
|
// Call sites.
|
|
const unsigned SiteStartSize = sizeof(int32_t); // DW_EH_PE_udata4
|
|
const unsigned SiteLengthSize = sizeof(int32_t); // DW_EH_PE_udata4
|
|
const unsigned LandingPadSize = sizeof(int32_t); // DW_EH_PE_udata4
|
|
unsigned SizeSites = CallSites.size() * (SiteStartSize +
|
|
SiteLengthSize +
|
|
LandingPadSize);
|
|
for (unsigned i = 0, e = CallSites.size(); i < e; ++i)
|
|
SizeSites += TargetAsmInfo::getULEB128Size(CallSites[i].Action);
|
|
|
|
// Type infos.
|
|
const unsigned TypeInfoSize = TD->getPointerSize(); // DW_EH_PE_absptr
|
|
unsigned SizeTypes = TypeInfos.size() * TypeInfoSize;
|
|
|
|
unsigned TypeOffset = sizeof(int8_t) + // Call site format
|
|
TargetAsmInfo::getULEB128Size(SizeSites) + // Call-site table length
|
|
SizeSites + SizeActions + SizeTypes;
|
|
|
|
unsigned TotalSize = sizeof(int8_t) + // LPStart format
|
|
sizeof(int8_t) + // TType format
|
|
TargetAsmInfo::getULEB128Size(TypeOffset) + // TType base offset
|
|
TypeOffset;
|
|
|
|
unsigned SizeAlign = (4 - TotalSize) & 3;
|
|
|
|
// Begin the exception table.
|
|
Asm->SwitchToDataSection(TAI->getDwarfExceptionSection());
|
|
Asm->EmitAlignment(2, 0, 0, false);
|
|
O << "GCC_except_table" << SubprogramCount << ":\n";
|
|
for (unsigned i = 0; i != SizeAlign; ++i) {
|
|
Asm->EmitInt8(0);
|
|
Asm->EOL("Padding");
|
|
}
|
|
EmitLabel("exception", SubprogramCount);
|
|
|
|
// Emit the header.
|
|
Asm->EmitInt8(DW_EH_PE_omit);
|
|
Asm->EOL("LPStart format (DW_EH_PE_omit)");
|
|
Asm->EmitInt8(DW_EH_PE_absptr);
|
|
Asm->EOL("TType format (DW_EH_PE_absptr)");
|
|
Asm->EmitULEB128Bytes(TypeOffset);
|
|
Asm->EOL("TType base offset");
|
|
Asm->EmitInt8(DW_EH_PE_udata4);
|
|
Asm->EOL("Call site format (DW_EH_PE_udata4)");
|
|
Asm->EmitULEB128Bytes(SizeSites);
|
|
Asm->EOL("Call-site table length");
|
|
|
|
// Emit the landing pad site information.
|
|
for (unsigned i = 0; i < CallSites.size(); ++i) {
|
|
CallSiteEntry &S = CallSites[i];
|
|
const char *BeginTag;
|
|
unsigned BeginNumber;
|
|
|
|
if (!S.BeginLabel) {
|
|
BeginTag = "eh_func_begin";
|
|
BeginNumber = SubprogramCount;
|
|
} else {
|
|
BeginTag = "label";
|
|
BeginNumber = S.BeginLabel;
|
|
}
|
|
|
|
EmitSectionOffset(BeginTag, "eh_func_begin", BeginNumber, SubprogramCount,
|
|
true, true);
|
|
Asm->EOL("Region start");
|
|
|
|
if (!S.EndLabel) {
|
|
EmitDifference("eh_func_end", SubprogramCount, BeginTag, BeginNumber,
|
|
true);
|
|
} else {
|
|
EmitDifference("label", S.EndLabel, BeginTag, BeginNumber, true);
|
|
}
|
|
Asm->EOL("Region length");
|
|
|
|
if (!S.PadLabel)
|
|
Asm->EmitInt32(0);
|
|
else
|
|
EmitSectionOffset("label", "eh_func_begin", S.PadLabel, SubprogramCount,
|
|
true, true);
|
|
Asm->EOL("Landing pad");
|
|
|
|
Asm->EmitULEB128Bytes(S.Action);
|
|
Asm->EOL("Action");
|
|
}
|
|
|
|
// Emit the actions.
|
|
for (unsigned I = 0, N = Actions.size(); I != N; ++I) {
|
|
ActionEntry &Action = Actions[I];
|
|
|
|
Asm->EmitSLEB128Bytes(Action.ValueForTypeID);
|
|
Asm->EOL("TypeInfo index");
|
|
Asm->EmitSLEB128Bytes(Action.NextAction);
|
|
Asm->EOL("Next action");
|
|
}
|
|
|
|
// Emit the type ids.
|
|
for (unsigned M = TypeInfos.size(); M; --M) {
|
|
GlobalVariable *GV = TypeInfos[M - 1];
|
|
|
|
PrintRelDirective();
|
|
|
|
if (GV)
|
|
O << Asm->getGlobalLinkName(GV);
|
|
else
|
|
O << "0";
|
|
|
|
Asm->EOL("TypeInfo");
|
|
}
|
|
|
|
// Emit the filter typeids.
|
|
for (unsigned j = 0, M = FilterIds.size(); j < M; ++j) {
|
|
unsigned TypeID = FilterIds[j];
|
|
Asm->EmitULEB128Bytes(TypeID);
|
|
Asm->EOL("Filter TypeInfo index");
|
|
}
|
|
|
|
Asm->EmitAlignment(2, 0, 0, false);
|
|
}
|
|
|
|
public:
|
|
//===--------------------------------------------------------------------===//
|
|
// Main entry points.
|
|
//
|
|
DwarfException(raw_ostream &OS, AsmPrinter *A, const TargetAsmInfo *T)
|
|
: Dwarf(OS, A, T, "eh"), shouldEmitTable(false), shouldEmitMoves(false),
|
|
shouldEmitTableModule(false), shouldEmitMovesModule(false),
|
|
ExceptionTimer(0) {
|
|
if (TimePassesIsEnabled)
|
|
ExceptionTimer = new Timer("Dwarf Exception Writer",
|
|
getDwarfTimerGroup());
|
|
}
|
|
|
|
virtual ~DwarfException() {
|
|
delete ExceptionTimer;
|
|
}
|
|
|
|
/// SetModuleInfo - Set machine module information when it's known that pass
|
|
/// manager has created it. Set by the target AsmPrinter.
|
|
void SetModuleInfo(MachineModuleInfo *mmi) {
|
|
MMI = mmi;
|
|
}
|
|
|
|
/// BeginModule - Emit all exception information that should come prior to the
|
|
/// content.
|
|
void BeginModule(Module *M) {
|
|
this->M = M;
|
|
}
|
|
|
|
/// EndModule - Emit all exception information that should come after the
|
|
/// content.
|
|
void EndModule() {
|
|
if (TimePassesIsEnabled)
|
|
ExceptionTimer->startTimer();
|
|
|
|
if (shouldEmitMovesModule || shouldEmitTableModule) {
|
|
const std::vector<Function *> Personalities = MMI->getPersonalities();
|
|
for (unsigned i = 0; i < Personalities.size(); ++i)
|
|
EmitCommonEHFrame(Personalities[i], i);
|
|
|
|
for (std::vector<FunctionEHFrameInfo>::iterator I = EHFrames.begin(),
|
|
E = EHFrames.end(); I != E; ++I)
|
|
EmitEHFrame(*I);
|
|
}
|
|
|
|
if (TimePassesIsEnabled)
|
|
ExceptionTimer->stopTimer();
|
|
}
|
|
|
|
/// BeginFunction - Gather pre-function exception information. Assumes being
|
|
/// emitted immediately after the function entry point.
|
|
void BeginFunction(MachineFunction *MF) {
|
|
if (TimePassesIsEnabled)
|
|
ExceptionTimer->startTimer();
|
|
|
|
this->MF = MF;
|
|
shouldEmitTable = shouldEmitMoves = false;
|
|
|
|
if (MMI && TAI->doesSupportExceptionHandling()) {
|
|
// Map all labels and get rid of any dead landing pads.
|
|
MMI->TidyLandingPads();
|
|
|
|
// If any landing pads survive, we need an EH table.
|
|
if (MMI->getLandingPads().size())
|
|
shouldEmitTable = true;
|
|
|
|
// See if we need frame move info.
|
|
if (!MF->getFunction()->doesNotThrow() || UnwindTablesMandatory)
|
|
shouldEmitMoves = true;
|
|
|
|
if (shouldEmitMoves || shouldEmitTable)
|
|
// Assumes in correct section after the entry point.
|
|
EmitLabel("eh_func_begin", ++SubprogramCount);
|
|
}
|
|
|
|
shouldEmitTableModule |= shouldEmitTable;
|
|
shouldEmitMovesModule |= shouldEmitMoves;
|
|
|
|
if (TimePassesIsEnabled)
|
|
ExceptionTimer->stopTimer();
|
|
}
|
|
|
|
/// EndFunction - Gather and emit post-function exception information.
|
|
///
|
|
void EndFunction() {
|
|
if (TimePassesIsEnabled)
|
|
ExceptionTimer->startTimer();
|
|
|
|
if (shouldEmitMoves || shouldEmitTable) {
|
|
EmitLabel("eh_func_end", SubprogramCount);
|
|
EmitExceptionTable();
|
|
|
|
// Save EH frame information
|
|
EHFrames.
|
|
push_back(FunctionEHFrameInfo(getAsm()->getCurrentFunctionEHName(MF),
|
|
SubprogramCount,
|
|
MMI->getPersonalityIndex(),
|
|
MF->getFrameInfo()->hasCalls(),
|
|
!MMI->getLandingPads().empty(),
|
|
MMI->getFrameMoves(),
|
|
MF->getFunction()));
|
|
}
|
|
|
|
if (TimePassesIsEnabled)
|
|
ExceptionTimer->stopTimer();
|
|
}
|
|
};
|
|
|
|
} // End of namespace llvm
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
/// Emit - Print the abbreviation using the specified Dwarf writer.
|
|
///
|
|
void DIEAbbrev::Emit(const DwarfDebug &DD) const {
|
|
// Emit its Dwarf tag type.
|
|
DD.getAsm()->EmitULEB128Bytes(Tag);
|
|
DD.getAsm()->EOL(TagString(Tag));
|
|
|
|
// Emit whether it has children DIEs.
|
|
DD.getAsm()->EmitULEB128Bytes(ChildrenFlag);
|
|
DD.getAsm()->EOL(ChildrenString(ChildrenFlag));
|
|
|
|
// For each attribute description.
|
|
for (unsigned i = 0, N = Data.size(); i < N; ++i) {
|
|
const DIEAbbrevData &AttrData = Data[i];
|
|
|
|
// Emit attribute type.
|
|
DD.getAsm()->EmitULEB128Bytes(AttrData.getAttribute());
|
|
DD.getAsm()->EOL(AttributeString(AttrData.getAttribute()));
|
|
|
|
// Emit form type.
|
|
DD.getAsm()->EmitULEB128Bytes(AttrData.getForm());
|
|
DD.getAsm()->EOL(FormEncodingString(AttrData.getForm()));
|
|
}
|
|
|
|
// Mark end of abbreviation.
|
|
DD.getAsm()->EmitULEB128Bytes(0); DD.getAsm()->EOL("EOM(1)");
|
|
DD.getAsm()->EmitULEB128Bytes(0); DD.getAsm()->EOL("EOM(2)");
|
|
}
|
|
|
|
#ifndef NDEBUG
|
|
void DIEAbbrev::print(std::ostream &O) {
|
|
O << "Abbreviation @"
|
|
<< std::hex << (intptr_t)this << std::dec
|
|
<< " "
|
|
<< TagString(Tag)
|
|
<< " "
|
|
<< ChildrenString(ChildrenFlag)
|
|
<< "\n";
|
|
|
|
for (unsigned i = 0, N = Data.size(); i < N; ++i) {
|
|
O << " "
|
|
<< AttributeString(Data[i].getAttribute())
|
|
<< " "
|
|
<< FormEncodingString(Data[i].getForm())
|
|
<< "\n";
|
|
}
|
|
}
|
|
void DIEAbbrev::dump() { print(cerr); }
|
|
#endif
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef NDEBUG
|
|
void DIEValue::dump() {
|
|
print(cerr);
|
|
}
|
|
#endif
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
/// EmitValue - Emit integer of appropriate size.
|
|
///
|
|
void DIEInteger::EmitValue(DwarfDebug &DD, unsigned Form) {
|
|
switch (Form) {
|
|
case DW_FORM_flag: // Fall thru
|
|
case DW_FORM_ref1: // Fall thru
|
|
case DW_FORM_data1: DD.getAsm()->EmitInt8(Integer); break;
|
|
case DW_FORM_ref2: // Fall thru
|
|
case DW_FORM_data2: DD.getAsm()->EmitInt16(Integer); break;
|
|
case DW_FORM_ref4: // Fall thru
|
|
case DW_FORM_data4: DD.getAsm()->EmitInt32(Integer); break;
|
|
case DW_FORM_ref8: // Fall thru
|
|
case DW_FORM_data8: DD.getAsm()->EmitInt64(Integer); break;
|
|
case DW_FORM_udata: DD.getAsm()->EmitULEB128Bytes(Integer); break;
|
|
case DW_FORM_sdata: DD.getAsm()->EmitSLEB128Bytes(Integer); break;
|
|
default: assert(0 && "DIE Value form not supported yet"); break;
|
|
}
|
|
}
|
|
|
|
/// SizeOf - Determine size of integer value in bytes.
|
|
///
|
|
unsigned DIEInteger::SizeOf(const DwarfDebug &DD, unsigned Form) const {
|
|
switch (Form) {
|
|
case DW_FORM_flag: // Fall thru
|
|
case DW_FORM_ref1: // Fall thru
|
|
case DW_FORM_data1: return sizeof(int8_t);
|
|
case DW_FORM_ref2: // Fall thru
|
|
case DW_FORM_data2: return sizeof(int16_t);
|
|
case DW_FORM_ref4: // Fall thru
|
|
case DW_FORM_data4: return sizeof(int32_t);
|
|
case DW_FORM_ref8: // Fall thru
|
|
case DW_FORM_data8: return sizeof(int64_t);
|
|
case DW_FORM_udata: return TargetAsmInfo::getULEB128Size(Integer);
|
|
case DW_FORM_sdata: return TargetAsmInfo::getSLEB128Size(Integer);
|
|
default: assert(0 && "DIE Value form not supported yet"); break;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
/// EmitValue - Emit string value.
|
|
///
|
|
void DIEString::EmitValue(DwarfDebug &DD, unsigned Form) {
|
|
DD.getAsm()->EmitString(Str);
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
/// EmitValue - Emit label value.
|
|
///
|
|
void DIEDwarfLabel::EmitValue(DwarfDebug &DD, unsigned Form) {
|
|
bool IsSmall = Form == DW_FORM_data4;
|
|
DD.EmitReference(Label, false, IsSmall);
|
|
}
|
|
|
|
/// SizeOf - Determine size of label value in bytes.
|
|
///
|
|
unsigned DIEDwarfLabel::SizeOf(const DwarfDebug &DD, unsigned Form) const {
|
|
if (Form == DW_FORM_data4) return 4;
|
|
return DD.getTargetData()->getPointerSize();
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
/// EmitValue - Emit label value.
|
|
///
|
|
void DIEObjectLabel::EmitValue(DwarfDebug &DD, unsigned Form) {
|
|
bool IsSmall = Form == DW_FORM_data4;
|
|
DD.EmitReference(Label, false, IsSmall);
|
|
}
|
|
|
|
/// SizeOf - Determine size of label value in bytes.
|
|
///
|
|
unsigned DIEObjectLabel::SizeOf(const DwarfDebug &DD, unsigned Form) const {
|
|
if (Form == DW_FORM_data4) return 4;
|
|
return DD.getTargetData()->getPointerSize();
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
/// EmitValue - Emit delta value.
|
|
///
|
|
void DIESectionOffset::EmitValue(DwarfDebug &DD, unsigned Form) {
|
|
bool IsSmall = Form == DW_FORM_data4;
|
|
DD.EmitSectionOffset(Label.Tag, Section.Tag,
|
|
Label.Number, Section.Number, IsSmall, IsEH, UseSet);
|
|
}
|
|
|
|
/// SizeOf - Determine size of delta value in bytes.
|
|
///
|
|
unsigned DIESectionOffset::SizeOf(const DwarfDebug &DD, unsigned Form) const {
|
|
if (Form == DW_FORM_data4) return 4;
|
|
return DD.getTargetData()->getPointerSize();
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
/// EmitValue - Emit delta value.
|
|
///
|
|
void DIEDelta::EmitValue(DwarfDebug &DD, unsigned Form) {
|
|
bool IsSmall = Form == DW_FORM_data4;
|
|
DD.EmitDifference(LabelHi, LabelLo, IsSmall);
|
|
}
|
|
|
|
/// SizeOf - Determine size of delta value in bytes.
|
|
///
|
|
unsigned DIEDelta::SizeOf(const DwarfDebug &DD, unsigned Form) const {
|
|
if (Form == DW_FORM_data4) return 4;
|
|
return DD.getTargetData()->getPointerSize();
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
/// EmitValue - Emit debug information entry offset.
|
|
///
|
|
void DIEntry::EmitValue(DwarfDebug &DD, unsigned Form) {
|
|
DD.getAsm()->EmitInt32(Entry->getOffset());
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
/// ComputeSize - calculate the size of the block.
|
|
///
|
|
unsigned DIEBlock::ComputeSize(DwarfDebug &DD) {
|
|
if (!Size) {
|
|
const SmallVector<DIEAbbrevData, 8> &AbbrevData = Abbrev.getData();
|
|
|
|
for (unsigned i = 0, N = Values.size(); i < N; ++i) {
|
|
Size += Values[i]->SizeOf(DD, AbbrevData[i].getForm());
|
|
}
|
|
}
|
|
return Size;
|
|
}
|
|
|
|
/// EmitValue - Emit block data.
|
|
///
|
|
void DIEBlock::EmitValue(DwarfDebug &DD, unsigned Form) {
|
|
switch (Form) {
|
|
case DW_FORM_block1: DD.getAsm()->EmitInt8(Size); break;
|
|
case DW_FORM_block2: DD.getAsm()->EmitInt16(Size); break;
|
|
case DW_FORM_block4: DD.getAsm()->EmitInt32(Size); break;
|
|
case DW_FORM_block: DD.getAsm()->EmitULEB128Bytes(Size); break;
|
|
default: assert(0 && "Improper form for block"); break;
|
|
}
|
|
|
|
const SmallVector<DIEAbbrevData, 8> &AbbrevData = Abbrev.getData();
|
|
|
|
for (unsigned i = 0, N = Values.size(); i < N; ++i) {
|
|
DD.getAsm()->EOL();
|
|
Values[i]->EmitValue(DD, AbbrevData[i].getForm());
|
|
}
|
|
}
|
|
|
|
/// SizeOf - Determine size of block data in bytes.
|
|
///
|
|
unsigned DIEBlock::SizeOf(const DwarfDebug &DD, unsigned Form) const {
|
|
switch (Form) {
|
|
case DW_FORM_block1: return Size + sizeof(int8_t);
|
|
case DW_FORM_block2: return Size + sizeof(int16_t);
|
|
case DW_FORM_block4: return Size + sizeof(int32_t);
|
|
case DW_FORM_block: return Size + TargetAsmInfo::getULEB128Size(Size);
|
|
default: assert(0 && "Improper form for block"); break;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
/// DIE Implementation
|
|
|
|
DIE::~DIE() {
|
|
for (unsigned i = 0, N = Children.size(); i < N; ++i)
|
|
delete Children[i];
|
|
}
|
|
|
|
/// AddSiblingOffset - Add a sibling offset field to the front of the DIE.
|
|
///
|
|
void DIE::AddSiblingOffset() {
|
|
DIEInteger *DI = new DIEInteger(0);
|
|
Values.insert(Values.begin(), DI);
|
|
Abbrev.AddFirstAttribute(DW_AT_sibling, DW_FORM_ref4);
|
|
}
|
|
|
|
/// Profile - Used to gather unique data for the value folding set.
|
|
///
|
|
void DIE::Profile(FoldingSetNodeID &ID) {
|
|
Abbrev.Profile(ID);
|
|
|
|
for (unsigned i = 0, N = Children.size(); i < N; ++i)
|
|
ID.AddPointer(Children[i]);
|
|
|
|
for (unsigned j = 0, M = Values.size(); j < M; ++j)
|
|
ID.AddPointer(Values[j]);
|
|
}
|
|
|
|
#ifndef NDEBUG
|
|
void DIE::print(std::ostream &O, unsigned IncIndent) {
|
|
static unsigned IndentCount = 0;
|
|
IndentCount += IncIndent;
|
|
const std::string Indent(IndentCount, ' ');
|
|
bool isBlock = Abbrev.getTag() == 0;
|
|
|
|
if (!isBlock) {
|
|
O << Indent
|
|
<< "Die: "
|
|
<< "0x" << std::hex << (intptr_t)this << std::dec
|
|
<< ", Offset: " << Offset
|
|
<< ", Size: " << Size
|
|
<< "\n";
|
|
|
|
O << Indent
|
|
<< TagString(Abbrev.getTag())
|
|
<< " "
|
|
<< ChildrenString(Abbrev.getChildrenFlag());
|
|
} else {
|
|
O << "Size: " << Size;
|
|
}
|
|
O << "\n";
|
|
|
|
const SmallVector<DIEAbbrevData, 8> &Data = Abbrev.getData();
|
|
|
|
IndentCount += 2;
|
|
for (unsigned i = 0, N = Data.size(); i < N; ++i) {
|
|
O << Indent;
|
|
|
|
if (!isBlock)
|
|
O << AttributeString(Data[i].getAttribute());
|
|
else
|
|
O << "Blk[" << i << "]";
|
|
|
|
O << " "
|
|
<< FormEncodingString(Data[i].getForm())
|
|
<< " ";
|
|
Values[i]->print(O);
|
|
O << "\n";
|
|
}
|
|
IndentCount -= 2;
|
|
|
|
for (unsigned j = 0, M = Children.size(); j < M; ++j) {
|
|
Children[j]->print(O, 4);
|
|
}
|
|
|
|
if (!isBlock) O << "\n";
|
|
IndentCount -= IncIndent;
|
|
}
|
|
|
|
void DIE::dump() {
|
|
print(cerr);
|
|
}
|
|
#endif
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
/// DwarfWriter Implementation
|
|
///
|
|
|
|
DwarfWriter::DwarfWriter()
|
|
: ImmutablePass(&ID), DD(0), DE(0) {}
|
|
|
|
DwarfWriter::~DwarfWriter() {
|
|
delete DE;
|
|
delete DD;
|
|
}
|
|
|
|
/// BeginModule - Emit all Dwarf sections that should come prior to the
|
|
/// content.
|
|
void DwarfWriter::BeginModule(Module *M,
|
|
MachineModuleInfo *MMI,
|
|
raw_ostream &OS, AsmPrinter *A,
|
|
const TargetAsmInfo *T) {
|
|
DE = new DwarfException(OS, A, T);
|
|
DD = new DwarfDebug(OS, A, T);
|
|
DE->BeginModule(M);
|
|
DD->BeginModule(M);
|
|
DD->SetDebugInfo(MMI);
|
|
DE->SetModuleInfo(MMI);
|
|
}
|
|
|
|
/// EndModule - Emit all Dwarf sections that should come after the content.
|
|
///
|
|
void DwarfWriter::EndModule() {
|
|
DE->EndModule();
|
|
DD->EndModule();
|
|
}
|
|
|
|
/// BeginFunction - Gather pre-function debug information. Assumes being
|
|
/// emitted immediately after the function entry point.
|
|
void DwarfWriter::BeginFunction(MachineFunction *MF) {
|
|
DE->BeginFunction(MF);
|
|
DD->BeginFunction(MF);
|
|
}
|
|
|
|
/// EndFunction - Gather and emit post-function debug information.
|
|
///
|
|
void DwarfWriter::EndFunction(MachineFunction *MF) {
|
|
DD->EndFunction(MF);
|
|
DE->EndFunction();
|
|
|
|
if (MachineModuleInfo *MMI = DD->getMMI() ? DD->getMMI() : DE->getMMI())
|
|
// Clear function debug information.
|
|
MMI->EndFunction();
|
|
}
|
|
|
|
/// ValidDebugInfo - Return true if V represents valid debug info value.
|
|
bool DwarfWriter::ValidDebugInfo(Value *V) {
|
|
return DD && DD->ValidDebugInfo(V);
|
|
}
|
|
|
|
/// RecordSourceLine - Records location information and associates it with a
|
|
/// label. Returns a unique label ID used to generate a label and provide
|
|
/// correspondence to the source line list.
|
|
unsigned DwarfWriter::RecordSourceLine(unsigned Line, unsigned Col,
|
|
unsigned Src) {
|
|
return DD->RecordSourceLine(Line, Col, Src);
|
|
}
|
|
|
|
/// getOrCreateSourceID - Look up the source id with the given directory and
|
|
/// source file names. If none currently exists, create a new id and insert it
|
|
/// in the SourceIds map. This can update DirectoryNames and SourceFileNames maps
|
|
/// as well.
|
|
unsigned DwarfWriter::getOrCreateSourceID(const std::string &DirName,
|
|
const std::string &FileName) {
|
|
return DD->getOrCreateSourceID(DirName, FileName);
|
|
}
|
|
|
|
/// RecordRegionStart - Indicate the start of a region.
|
|
unsigned DwarfWriter::RecordRegionStart(GlobalVariable *V) {
|
|
return DD->RecordRegionStart(V);
|
|
}
|
|
|
|
/// RecordRegionEnd - Indicate the end of a region.
|
|
unsigned DwarfWriter::RecordRegionEnd(GlobalVariable *V) {
|
|
return DD->RecordRegionEnd(V);
|
|
}
|
|
|
|
/// getRecordSourceLineCount - Count source lines.
|
|
unsigned DwarfWriter::getRecordSourceLineCount() {
|
|
return DD->getRecordSourceLineCount();
|
|
}
|
|
|
|
/// RecordVariable - Indicate the declaration of a local variable.
|
|
///
|
|
void DwarfWriter::RecordVariable(GlobalVariable *GV, unsigned FrameIndex) {
|
|
DD->RecordVariable(GV, FrameIndex);
|
|
}
|
|
|
|
/// ShouldEmitDwarfDebug - Returns true if Dwarf debugging declarations should
|
|
/// be emitted.
|
|
bool DwarfWriter::ShouldEmitDwarfDebug() const {
|
|
return DD->ShouldEmitDwarfDebug();
|
|
}
|