3007 lines
98 KiB
C++
3007 lines
98 KiB
C++
//===-- llvm/CodeGen/DwarfDebug.cpp - Dwarf Debug Framework ---------------===//
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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 debug info into asm files.
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//
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//===----------------------------------------------------------------------===//
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#define DEBUG_TYPE "dwarfdebug"
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#include "DwarfDebug.h"
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#include "llvm/Module.h"
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#include "llvm/CodeGen/MachineFunction.h"
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#include "llvm/CodeGen/MachineModuleInfo.h"
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#include "llvm/MC/MCSection.h"
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#include "llvm/MC/MCStreamer.h"
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#include "llvm/MC/MCAsmInfo.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/TargetLoweringObjectFile.h"
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#include "llvm/Target/TargetRegisterInfo.h"
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#include "llvm/ADT/StringExtras.h"
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#include "llvm/Support/Debug.h"
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#include "llvm/Support/ErrorHandling.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/System/Path.h"
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using namespace llvm;
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static TimerGroup &getDwarfTimerGroup() {
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static TimerGroup DwarfTimerGroup("Dwarf Debugging");
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return DwarfTimerGroup;
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}
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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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namespace llvm {
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//===----------------------------------------------------------------------===//
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/// CompileUnit - This dwarf writer support class manages information associate
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/// with a source file.
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class VISIBILITY_HIDDEN CompileUnit {
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/// ID - File identifier for source.
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///
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unsigned ID;
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/// Die - Compile unit debug information entry.
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///
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DIE *Die;
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/// GVToDieMap - Tracks the mapping of unit level debug informaton
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/// variables to debug information entries.
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/// FIXME : Rename GVToDieMap -> NodeToDieMap
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std::map<MDNode *, DIE *> GVToDieMap;
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/// GVToDIEEntryMap - Tracks the mapping of unit level debug informaton
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/// descriptors to debug information entries using a DIEEntry proxy.
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/// FIXME : Rename
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std::map<MDNode *, DIEEntry *> GVToDIEEntryMap;
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/// Globals - A map of globally visible named entities for this unit.
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///
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StringMap<DIE*> Globals;
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/// DiesSet - Used to uniquely define dies within the compile unit.
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///
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FoldingSet<DIE> DiesSet;
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public:
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CompileUnit(unsigned I, DIE *D)
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: ID(I), Die(D), DiesSet(InitDiesSetSize) {}
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~CompileUnit() { delete Die; }
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// Accessors.
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unsigned getID() const { return ID; }
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DIE* getDie() const { return Die; }
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StringMap<DIE*> &getGlobals() { return Globals; }
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/// hasContent - Return true if this compile unit has something to write out.
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///
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bool hasContent() const { return !Die->getChildren().empty(); }
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/// AddGlobal - Add a new global entity to the compile unit.
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///
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void AddGlobal(const std::string &Name, DIE *Die) { Globals[Name] = Die; }
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/// getDieMapSlotFor - Returns the debug information entry map slot for the
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/// specified debug variable.
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DIE *&getDieMapSlotFor(MDNode *N) { return GVToDieMap[N]; }
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/// getDIEEntrySlotFor - Returns the debug information entry proxy slot for
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/// the specified debug variable.
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DIEEntry *&getDIEEntrySlotFor(MDNode *N) {
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return GVToDIEEntryMap[N];
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}
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/// AddDie - Adds or interns the DIE to the compile unit.
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///
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DIE *AddDie(DIE &Buffer) {
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FoldingSetNodeID ID;
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Buffer.Profile(ID);
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void *Where;
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DIE *Die = DiesSet.FindNodeOrInsertPos(ID, Where);
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if (!Die) {
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Die = new DIE(Buffer);
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DiesSet.InsertNode(Die, Where);
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this->Die->AddChild(Die);
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Buffer.Detach();
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}
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return Die;
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}
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};
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//===----------------------------------------------------------------------===//
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/// DbgVariable - This class is used to track local variable information.
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///
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class VISIBILITY_HIDDEN DbgVariable {
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DIVariable Var; // Variable Descriptor.
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unsigned FrameIndex; // Variable frame index.
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bool InlinedFnVar; // Variable for an inlined function.
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public:
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DbgVariable(DIVariable V, unsigned I, bool IFV)
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: Var(V), FrameIndex(I), InlinedFnVar(IFV) {}
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// Accessors.
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DIVariable getVariable() const { return Var; }
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unsigned getFrameIndex() const { return FrameIndex; }
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bool isInlinedFnVar() const { return InlinedFnVar; }
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};
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//===----------------------------------------------------------------------===//
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/// DbgScope - This class is used to track scope information.
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///
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class DbgConcreteScope;
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class VISIBILITY_HIDDEN DbgScope {
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DbgScope *Parent; // Parent to this scope.
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DIDescriptor Desc; // Debug info descriptor for scope.
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// Either subprogram or block.
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unsigned StartLabelID; // Label ID of the beginning of scope.
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unsigned EndLabelID; // Label ID of the end of scope.
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const MachineInstr *LastInsn; // Last instruction of this scope.
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const MachineInstr *FirstInsn; // First instruction of this scope.
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SmallVector<DbgScope *, 4> Scopes; // Scopes defined in scope.
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SmallVector<DbgVariable *, 8> Variables;// Variables declared in scope.
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SmallVector<DbgConcreteScope *, 8> ConcreteInsts;// Concrete insts of funcs.
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// Private state for dump()
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mutable unsigned IndentLevel;
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public:
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DbgScope(DbgScope *P, DIDescriptor D)
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: Parent(P), Desc(D), StartLabelID(0), EndLabelID(0), LastInsn(0),
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FirstInsn(0), IndentLevel(0) {}
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virtual ~DbgScope();
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// Accessors.
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DbgScope *getParent() const { return Parent; }
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DIDescriptor getDesc() const { return Desc; }
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unsigned getStartLabelID() const { return StartLabelID; }
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unsigned getEndLabelID() const { return EndLabelID; }
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SmallVector<DbgScope *, 4> &getScopes() { return Scopes; }
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SmallVector<DbgVariable *, 8> &getVariables() { return Variables; }
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SmallVector<DbgConcreteScope*,8> &getConcreteInsts() { return ConcreteInsts; }
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void setStartLabelID(unsigned S) { StartLabelID = S; }
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void setEndLabelID(unsigned E) { EndLabelID = E; }
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void setLastInsn(const MachineInstr *MI) { LastInsn = MI; }
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const MachineInstr *getLastInsn() { return LastInsn; }
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void setFirstInsn(const MachineInstr *MI) { FirstInsn = MI; }
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const MachineInstr *getFirstInsn() { return FirstInsn; }
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/// AddScope - Add a scope to the scope.
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///
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void AddScope(DbgScope *S) { Scopes.push_back(S); }
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/// AddVariable - Add a variable to the scope.
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///
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void AddVariable(DbgVariable *V) { Variables.push_back(V); }
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/// AddConcreteInst - Add a concrete instance to the scope.
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///
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void AddConcreteInst(DbgConcreteScope *C) { ConcreteInsts.push_back(C); }
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void FixInstructionMarkers() {
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assert (getFirstInsn() && "First instruction is missing!");
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if (getLastInsn())
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return;
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// If a scope does not have an instruction to mark an end then use
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// the end of last child scope.
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SmallVector<DbgScope *, 4> &Scopes = getScopes();
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assert (!Scopes.empty() && "Inner most scope does not have last insn!");
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DbgScope *L = Scopes.back();
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if (!L->getLastInsn())
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L->FixInstructionMarkers();
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setLastInsn(L->getLastInsn());
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}
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#ifndef NDEBUG
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void dump() const;
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#endif
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};
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#ifndef NDEBUG
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void DbgScope::dump() const {
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raw_ostream &err = errs();
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err.indent(IndentLevel);
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Desc.dump();
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err << " [" << StartLabelID << ", " << EndLabelID << "]\n";
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IndentLevel += 2;
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for (unsigned i = 0, e = Scopes.size(); i != e; ++i)
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if (Scopes[i] != this)
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Scopes[i]->dump();
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IndentLevel -= 2;
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}
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#endif
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//===----------------------------------------------------------------------===//
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/// DbgConcreteScope - This class is used to track a scope that holds concrete
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/// instance information.
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///
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class VISIBILITY_HIDDEN DbgConcreteScope : public DbgScope {
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CompileUnit *Unit;
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DIE *Die; // Debug info for this concrete scope.
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public:
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DbgConcreteScope(DIDescriptor D) : DbgScope(NULL, D) {}
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// Accessors.
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DIE *getDie() const { return Die; }
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void setDie(DIE *D) { Die = D; }
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};
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DbgScope::~DbgScope() {
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for (unsigned i = 0, N = Scopes.size(); i < N; ++i)
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delete Scopes[i];
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for (unsigned j = 0, M = Variables.size(); j < M; ++j)
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delete Variables[j];
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for (unsigned k = 0, O = ConcreteInsts.size(); k < O; ++k)
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delete ConcreteInsts[k];
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}
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} // end llvm namespace
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DwarfDebug::DwarfDebug(raw_ostream &OS, AsmPrinter *A, const MCAsmInfo *T)
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: Dwarf(OS, A, T, "dbg"), ModuleCU(0),
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AbbreviationsSet(InitAbbreviationsSetSize), Abbreviations(),
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ValuesSet(InitValuesSetSize), Values(), StringPool(),
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SectionSourceLines(), didInitial(false), shouldEmit(false),
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FunctionDbgScope(0), DebugTimer(0) {
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if (TimePassesIsEnabled)
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DebugTimer = new Timer("Dwarf Debug Writer",
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getDwarfTimerGroup());
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}
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DwarfDebug::~DwarfDebug() {
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for (unsigned j = 0, M = Values.size(); j < M; ++j)
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delete Values[j];
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for (DenseMap<const MDNode *, DbgScope *>::iterator
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I = AbstractInstanceRootMap.begin(),
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E = AbstractInstanceRootMap.end(); I != E;++I)
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delete I->second;
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delete DebugTimer;
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}
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/// AssignAbbrevNumber - Define a unique number for the abbreviation.
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///
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void DwarfDebug::AssignAbbrevNumber(DIEAbbrev &Abbrev) {
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// Profile the node so that we can make it unique.
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FoldingSetNodeID ID;
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Abbrev.Profile(ID);
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// Check the set for priors.
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DIEAbbrev *InSet = AbbreviationsSet.GetOrInsertNode(&Abbrev);
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// If it's newly added.
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if (InSet == &Abbrev) {
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// Add to abbreviation list.
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Abbreviations.push_back(&Abbrev);
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// Assign the vector position + 1 as its number.
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Abbrev.setNumber(Abbreviations.size());
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} else {
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// Assign existing abbreviation number.
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Abbrev.setNumber(InSet->getNumber());
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}
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}
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/// CreateDIEEntry - Creates a new DIEEntry to be a proxy for a debug
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/// information entry.
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DIEEntry *DwarfDebug::CreateDIEEntry(DIE *Entry) {
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DIEEntry *Value;
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if (Entry) {
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FoldingSetNodeID ID;
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DIEEntry::Profile(ID, Entry);
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void *Where;
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Value = static_cast<DIEEntry *>(ValuesSet.FindNodeOrInsertPos(ID, Where));
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if (Value) return Value;
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Value = new DIEEntry(Entry);
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ValuesSet.InsertNode(Value, Where);
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} else {
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Value = new DIEEntry(Entry);
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}
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Values.push_back(Value);
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return Value;
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}
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/// SetDIEEntry - Set a DIEEntry once the debug information entry is defined.
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///
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void DwarfDebug::SetDIEEntry(DIEEntry *Value, DIE *Entry) {
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Value->setEntry(Entry);
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// Add to values set if not already there. If it is, we merely have a
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// duplicate in the values list (no harm.)
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ValuesSet.GetOrInsertNode(Value);
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}
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/// AddUInt - Add an unsigned integer attribute data and value.
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///
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void DwarfDebug::AddUInt(DIE *Die, unsigned Attribute,
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unsigned Form, uint64_t Integer) {
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if (!Form) Form = DIEInteger::BestForm(false, Integer);
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FoldingSetNodeID ID;
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DIEInteger::Profile(ID, Integer);
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void *Where;
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DIEValue *Value = ValuesSet.FindNodeOrInsertPos(ID, Where);
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if (!Value) {
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Value = new DIEInteger(Integer);
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ValuesSet.InsertNode(Value, Where);
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Values.push_back(Value);
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}
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Die->AddValue(Attribute, Form, Value);
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}
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/// AddSInt - Add an signed integer attribute data and value.
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///
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void DwarfDebug::AddSInt(DIE *Die, unsigned Attribute,
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unsigned Form, int64_t Integer) {
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if (!Form) Form = DIEInteger::BestForm(true, Integer);
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FoldingSetNodeID ID;
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DIEInteger::Profile(ID, (uint64_t)Integer);
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void *Where;
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DIEValue *Value = ValuesSet.FindNodeOrInsertPos(ID, Where);
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if (!Value) {
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Value = new DIEInteger(Integer);
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ValuesSet.InsertNode(Value, Where);
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Values.push_back(Value);
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}
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Die->AddValue(Attribute, Form, Value);
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}
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/// AddString - Add a string attribute data and value.
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///
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void DwarfDebug::AddString(DIE *Die, unsigned Attribute, unsigned Form,
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const std::string &String) {
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FoldingSetNodeID ID;
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DIEString::Profile(ID, String);
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void *Where;
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DIEValue *Value = ValuesSet.FindNodeOrInsertPos(ID, Where);
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if (!Value) {
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Value = new DIEString(String);
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ValuesSet.InsertNode(Value, Where);
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Values.push_back(Value);
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}
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Die->AddValue(Attribute, Form, Value);
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}
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/// AddLabel - Add a Dwarf label attribute data and value.
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///
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void DwarfDebug::AddLabel(DIE *Die, unsigned Attribute, unsigned Form,
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const DWLabel &Label) {
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FoldingSetNodeID ID;
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DIEDwarfLabel::Profile(ID, Label);
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void *Where;
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DIEValue *Value = ValuesSet.FindNodeOrInsertPos(ID, Where);
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if (!Value) {
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Value = new DIEDwarfLabel(Label);
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ValuesSet.InsertNode(Value, Where);
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Values.push_back(Value);
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}
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Die->AddValue(Attribute, Form, Value);
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}
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/// AddObjectLabel - Add an non-Dwarf label attribute data and value.
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///
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void DwarfDebug::AddObjectLabel(DIE *Die, unsigned Attribute, unsigned Form,
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const std::string &Label) {
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FoldingSetNodeID ID;
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DIEObjectLabel::Profile(ID, Label);
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void *Where;
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DIEValue *Value = ValuesSet.FindNodeOrInsertPos(ID, Where);
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if (!Value) {
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Value = new DIEObjectLabel(Label);
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ValuesSet.InsertNode(Value, Where);
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Values.push_back(Value);
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}
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Die->AddValue(Attribute, Form, Value);
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}
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/// AddSectionOffset - Add a section offset label attribute data and value.
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///
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void DwarfDebug::AddSectionOffset(DIE *Die, unsigned Attribute, unsigned Form,
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const DWLabel &Label, const DWLabel &Section,
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bool isEH, bool useSet) {
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FoldingSetNodeID ID;
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DIESectionOffset::Profile(ID, Label, Section);
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void *Where;
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DIEValue *Value = ValuesSet.FindNodeOrInsertPos(ID, Where);
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if (!Value) {
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Value = new DIESectionOffset(Label, Section, isEH, useSet);
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ValuesSet.InsertNode(Value, Where);
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Values.push_back(Value);
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}
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Die->AddValue(Attribute, Form, Value);
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}
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/// AddDelta - Add a label delta attribute data and value.
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///
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void DwarfDebug::AddDelta(DIE *Die, unsigned Attribute, unsigned Form,
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const DWLabel &Hi, const DWLabel &Lo) {
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FoldingSetNodeID ID;
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DIEDelta::Profile(ID, Hi, Lo);
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void *Where;
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DIEValue *Value = ValuesSet.FindNodeOrInsertPos(ID, Where);
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if (!Value) {
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Value = new DIEDelta(Hi, Lo);
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ValuesSet.InsertNode(Value, Where);
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Values.push_back(Value);
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}
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Die->AddValue(Attribute, Form, Value);
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}
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/// AddBlock - Add block data.
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///
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void DwarfDebug::AddBlock(DIE *Die, unsigned Attribute, unsigned Form,
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DIEBlock *Block) {
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Block->ComputeSize(TD);
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FoldingSetNodeID ID;
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Block->Profile(ID);
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void *Where;
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DIEValue *Value = ValuesSet.FindNodeOrInsertPos(ID, Where);
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if (!Value) {
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Value = Block;
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ValuesSet.InsertNode(Value, Where);
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Values.push_back(Value);
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} else {
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// Already exists, reuse the previous one.
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delete Block;
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Block = cast<DIEBlock>(Value);
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}
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Die->AddValue(Attribute, Block->BestForm(), Value);
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}
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/// AddSourceLine - Add location information to specified debug information
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/// entry.
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void DwarfDebug::AddSourceLine(DIE *Die, const DIVariable *V) {
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// If there is no compile unit specified, don't add a line #.
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if (V->getCompileUnit().isNull())
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return;
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unsigned Line = V->getLineNumber();
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unsigned FileID = FindCompileUnit(V->getCompileUnit()).getID();
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assert(FileID && "Invalid file id");
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AddUInt(Die, dwarf::DW_AT_decl_file, 0, FileID);
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AddUInt(Die, dwarf::DW_AT_decl_line, 0, Line);
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}
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/// AddSourceLine - Add location information to specified debug information
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/// entry.
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void DwarfDebug::AddSourceLine(DIE *Die, const DIGlobal *G) {
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// If there is no compile unit specified, don't add a line #.
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if (G->getCompileUnit().isNull())
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return;
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unsigned Line = G->getLineNumber();
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unsigned FileID = FindCompileUnit(G->getCompileUnit()).getID();
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assert(FileID && "Invalid file id");
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AddUInt(Die, dwarf::DW_AT_decl_file, 0, FileID);
|
|
AddUInt(Die, dwarf::DW_AT_decl_line, 0, Line);
|
|
}
|
|
|
|
/// AddSourceLine - Add location information to specified debug information
|
|
/// entry.
|
|
void DwarfDebug::AddSourceLine(DIE *Die, const DISubprogram *SP) {
|
|
// If there is no compile unit specified, don't add a line #.
|
|
if (SP->getCompileUnit().isNull())
|
|
return;
|
|
// If the line number is 0, don't add it.
|
|
if (SP->getLineNumber() == 0)
|
|
return;
|
|
|
|
|
|
unsigned Line = SP->getLineNumber();
|
|
unsigned FileID = FindCompileUnit(SP->getCompileUnit()).getID();
|
|
assert(FileID && "Invalid file id");
|
|
AddUInt(Die, dwarf::DW_AT_decl_file, 0, FileID);
|
|
AddUInt(Die, dwarf::DW_AT_decl_line, 0, Line);
|
|
}
|
|
|
|
/// AddSourceLine - Add location information to specified debug information
|
|
/// entry.
|
|
void DwarfDebug::AddSourceLine(DIE *Die, const DIType *Ty) {
|
|
// If there is no compile unit specified, don't add a line #.
|
|
DICompileUnit CU = Ty->getCompileUnit();
|
|
if (CU.isNull())
|
|
return;
|
|
|
|
unsigned Line = Ty->getLineNumber();
|
|
unsigned FileID = FindCompileUnit(CU).getID();
|
|
assert(FileID && "Invalid file id");
|
|
AddUInt(Die, dwarf::DW_AT_decl_file, 0, FileID);
|
|
AddUInt(Die, dwarf::DW_AT_decl_line, 0, Line);
|
|
}
|
|
|
|
/* Byref variables, in Blocks, are declared by the programmer as
|
|
"SomeType VarName;", but the compiler creates a
|
|
__Block_byref_x_VarName struct, and gives the variable VarName
|
|
either the struct, or a pointer to the struct, as its type. This
|
|
is necessary for various behind-the-scenes things the compiler
|
|
needs to do with by-reference variables in blocks.
|
|
|
|
However, as far as the original *programmer* is concerned, the
|
|
variable should still have type 'SomeType', as originally declared.
|
|
|
|
The following function dives into the __Block_byref_x_VarName
|
|
struct to find the original type of the variable. This will be
|
|
passed back to the code generating the type for the Debug
|
|
Information Entry for the variable 'VarName'. 'VarName' will then
|
|
have the original type 'SomeType' in its debug information.
|
|
|
|
The original type 'SomeType' will be the type of the field named
|
|
'VarName' inside the __Block_byref_x_VarName struct.
|
|
|
|
NOTE: In order for this to not completely fail on the debugger
|
|
side, the Debug Information Entry for the variable VarName needs to
|
|
have a DW_AT_location that tells the debugger how to unwind through
|
|
the pointers and __Block_byref_x_VarName struct to find the actual
|
|
value of the variable. The function AddBlockByrefType does this. */
|
|
|
|
/// Find the type the programmer originally declared the variable to be
|
|
/// and return that type.
|
|
///
|
|
DIType DwarfDebug::GetBlockByrefType(DIType Ty, std::string Name) {
|
|
|
|
DIType subType = Ty;
|
|
unsigned tag = Ty.getTag();
|
|
|
|
if (tag == dwarf::DW_TAG_pointer_type) {
|
|
DIDerivedType DTy = DIDerivedType(Ty.getNode());
|
|
subType = DTy.getTypeDerivedFrom();
|
|
}
|
|
|
|
DICompositeType blockStruct = DICompositeType(subType.getNode());
|
|
|
|
DIArray Elements = blockStruct.getTypeArray();
|
|
|
|
if (Elements.isNull())
|
|
return Ty;
|
|
|
|
for (unsigned i = 0, N = Elements.getNumElements(); i < N; ++i) {
|
|
DIDescriptor Element = Elements.getElement(i);
|
|
DIDerivedType DT = DIDerivedType(Element.getNode());
|
|
if (strcmp(Name.c_str(), DT.getName()) == 0)
|
|
return (DT.getTypeDerivedFrom());
|
|
}
|
|
|
|
return Ty;
|
|
}
|
|
|
|
/// AddComplexAddress - Start with the address based on the location provided,
|
|
/// and generate the DWARF information necessary to find the actual variable
|
|
/// given the extra address information encoded in the DIVariable, starting from
|
|
/// the starting location. Add the DWARF information to the die.
|
|
///
|
|
void DwarfDebug::AddComplexAddress(DbgVariable *&DV, DIE *Die,
|
|
unsigned Attribute,
|
|
const MachineLocation &Location) {
|
|
const DIVariable &VD = DV->getVariable();
|
|
DIType Ty = VD.getType();
|
|
|
|
// Decode the original location, and use that as the start of the byref
|
|
// variable's location.
|
|
unsigned Reg = RI->getDwarfRegNum(Location.getReg(), false);
|
|
DIEBlock *Block = new DIEBlock();
|
|
|
|
if (Location.isReg()) {
|
|
if (Reg < 32) {
|
|
AddUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_reg0 + Reg);
|
|
} else {
|
|
Reg = Reg - dwarf::DW_OP_reg0;
|
|
AddUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_breg0 + Reg);
|
|
AddUInt(Block, 0, dwarf::DW_FORM_udata, Reg);
|
|
}
|
|
} else {
|
|
if (Reg < 32)
|
|
AddUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_breg0 + Reg);
|
|
else {
|
|
AddUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_bregx);
|
|
AddUInt(Block, 0, dwarf::DW_FORM_udata, Reg);
|
|
}
|
|
|
|
AddUInt(Block, 0, dwarf::DW_FORM_sdata, Location.getOffset());
|
|
}
|
|
|
|
for (unsigned i = 0, N = VD.getNumAddrElements(); i < N; ++i) {
|
|
uint64_t Element = VD.getAddrElement(i);
|
|
|
|
if (Element == DIFactory::OpPlus) {
|
|
AddUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_plus_uconst);
|
|
AddUInt(Block, 0, dwarf::DW_FORM_udata, VD.getAddrElement(++i));
|
|
} else if (Element == DIFactory::OpDeref) {
|
|
AddUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_deref);
|
|
} else llvm_unreachable("unknown DIFactory Opcode");
|
|
}
|
|
|
|
// Now attach the location information to the DIE.
|
|
AddBlock(Die, Attribute, 0, Block);
|
|
}
|
|
|
|
/* Byref variables, in Blocks, are declared by the programmer as "SomeType
|
|
VarName;", but the compiler creates a __Block_byref_x_VarName struct, and
|
|
gives the variable VarName either the struct, or a pointer to the struct, as
|
|
its type. This is necessary for various behind-the-scenes things the
|
|
compiler needs to do with by-reference variables in Blocks.
|
|
|
|
However, as far as the original *programmer* is concerned, the variable
|
|
should still have type 'SomeType', as originally declared.
|
|
|
|
The function GetBlockByrefType dives into the __Block_byref_x_VarName
|
|
struct to find the original type of the variable, which is then assigned to
|
|
the variable's Debug Information Entry as its real type. So far, so good.
|
|
However now the debugger will expect the variable VarName to have the type
|
|
SomeType. So we need the location attribute for the variable to be an
|
|
expression that explains to the debugger how to navigate through the
|
|
pointers and struct to find the actual variable of type SomeType.
|
|
|
|
The following function does just that. We start by getting
|
|
the "normal" location for the variable. This will be the location
|
|
of either the struct __Block_byref_x_VarName or the pointer to the
|
|
struct __Block_byref_x_VarName.
|
|
|
|
The struct will look something like:
|
|
|
|
struct __Block_byref_x_VarName {
|
|
... <various fields>
|
|
struct __Block_byref_x_VarName *forwarding;
|
|
... <various other fields>
|
|
SomeType VarName;
|
|
... <maybe more fields>
|
|
};
|
|
|
|
If we are given the struct directly (as our starting point) we
|
|
need to tell the debugger to:
|
|
|
|
1). Add the offset of the forwarding field.
|
|
|
|
2). Follow that pointer to get the the real __Block_byref_x_VarName
|
|
struct to use (the real one may have been copied onto the heap).
|
|
|
|
3). Add the offset for the field VarName, to find the actual variable.
|
|
|
|
If we started with a pointer to the struct, then we need to
|
|
dereference that pointer first, before the other steps.
|
|
Translating this into DWARF ops, we will need to append the following
|
|
to the current location description for the variable:
|
|
|
|
DW_OP_deref -- optional, if we start with a pointer
|
|
DW_OP_plus_uconst <forward_fld_offset>
|
|
DW_OP_deref
|
|
DW_OP_plus_uconst <varName_fld_offset>
|
|
|
|
That is what this function does. */
|
|
|
|
/// AddBlockByrefAddress - Start with the address based on the location
|
|
/// provided, and generate the DWARF information necessary to find the
|
|
/// actual Block variable (navigating the Block struct) based on the
|
|
/// starting location. Add the DWARF information to the die. For
|
|
/// more information, read large comment just above here.
|
|
///
|
|
void DwarfDebug::AddBlockByrefAddress(DbgVariable *&DV, DIE *Die,
|
|
unsigned Attribute,
|
|
const MachineLocation &Location) {
|
|
const DIVariable &VD = DV->getVariable();
|
|
DIType Ty = VD.getType();
|
|
DIType TmpTy = Ty;
|
|
unsigned Tag = Ty.getTag();
|
|
bool isPointer = false;
|
|
|
|
const char *varName = VD.getName();
|
|
|
|
if (Tag == dwarf::DW_TAG_pointer_type) {
|
|
DIDerivedType DTy = DIDerivedType(Ty.getNode());
|
|
TmpTy = DTy.getTypeDerivedFrom();
|
|
isPointer = true;
|
|
}
|
|
|
|
DICompositeType blockStruct = DICompositeType(TmpTy.getNode());
|
|
|
|
// Find the __forwarding field and the variable field in the __Block_byref
|
|
// struct.
|
|
DIArray Fields = blockStruct.getTypeArray();
|
|
DIDescriptor varField = DIDescriptor();
|
|
DIDescriptor forwardingField = DIDescriptor();
|
|
|
|
|
|
for (unsigned i = 0, N = Fields.getNumElements(); i < N; ++i) {
|
|
DIDescriptor Element = Fields.getElement(i);
|
|
DIDerivedType DT = DIDerivedType(Element.getNode());
|
|
const char *fieldName = DT.getName();
|
|
if (strcmp(fieldName, "__forwarding") == 0)
|
|
forwardingField = Element;
|
|
else if (strcmp(fieldName, varName) == 0)
|
|
varField = Element;
|
|
}
|
|
|
|
assert(!varField.isNull() && "Can't find byref variable in Block struct");
|
|
assert(!forwardingField.isNull()
|
|
&& "Can't find forwarding field in Block struct");
|
|
|
|
// Get the offsets for the forwarding field and the variable field.
|
|
unsigned int forwardingFieldOffset =
|
|
DIDerivedType(forwardingField.getNode()).getOffsetInBits() >> 3;
|
|
unsigned int varFieldOffset =
|
|
DIDerivedType(varField.getNode()).getOffsetInBits() >> 3;
|
|
|
|
// Decode the original location, and use that as the start of the byref
|
|
// variable's location.
|
|
unsigned Reg = RI->getDwarfRegNum(Location.getReg(), false);
|
|
DIEBlock *Block = new DIEBlock();
|
|
|
|
if (Location.isReg()) {
|
|
if (Reg < 32)
|
|
AddUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_reg0 + Reg);
|
|
else {
|
|
Reg = Reg - dwarf::DW_OP_reg0;
|
|
AddUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_breg0 + Reg);
|
|
AddUInt(Block, 0, dwarf::DW_FORM_udata, Reg);
|
|
}
|
|
} else {
|
|
if (Reg < 32)
|
|
AddUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_breg0 + Reg);
|
|
else {
|
|
AddUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_bregx);
|
|
AddUInt(Block, 0, dwarf::DW_FORM_udata, Reg);
|
|
}
|
|
|
|
AddUInt(Block, 0, dwarf::DW_FORM_sdata, Location.getOffset());
|
|
}
|
|
|
|
// If we started with a pointer to the __Block_byref... struct, then
|
|
// the first thing we need to do is dereference the pointer (DW_OP_deref).
|
|
if (isPointer)
|
|
AddUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_deref);
|
|
|
|
// Next add the offset for the '__forwarding' field:
|
|
// DW_OP_plus_uconst ForwardingFieldOffset. Note there's no point in
|
|
// adding the offset if it's 0.
|
|
if (forwardingFieldOffset > 0) {
|
|
AddUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_plus_uconst);
|
|
AddUInt(Block, 0, dwarf::DW_FORM_udata, forwardingFieldOffset);
|
|
}
|
|
|
|
// Now dereference the __forwarding field to get to the real __Block_byref
|
|
// struct: DW_OP_deref.
|
|
AddUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_deref);
|
|
|
|
// Now that we've got the real __Block_byref... struct, add the offset
|
|
// for the variable's field to get to the location of the actual variable:
|
|
// DW_OP_plus_uconst varFieldOffset. Again, don't add if it's 0.
|
|
if (varFieldOffset > 0) {
|
|
AddUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_plus_uconst);
|
|
AddUInt(Block, 0, dwarf::DW_FORM_udata, varFieldOffset);
|
|
}
|
|
|
|
// Now attach the location information to the DIE.
|
|
AddBlock(Die, Attribute, 0, Block);
|
|
}
|
|
|
|
/// AddAddress - Add an address attribute to a die based on the location
|
|
/// provided.
|
|
void DwarfDebug::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, dwarf::DW_FORM_data1, dwarf::DW_OP_reg0 + Reg);
|
|
} else {
|
|
AddUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_regx);
|
|
AddUInt(Block, 0, dwarf::DW_FORM_udata, Reg);
|
|
}
|
|
} else {
|
|
if (Reg < 32) {
|
|
AddUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_breg0 + Reg);
|
|
} else {
|
|
AddUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_bregx);
|
|
AddUInt(Block, 0, dwarf::DW_FORM_udata, Reg);
|
|
}
|
|
|
|
AddUInt(Block, 0, dwarf::DW_FORM_sdata, Location.getOffset());
|
|
}
|
|
|
|
AddBlock(Die, Attribute, 0, Block);
|
|
}
|
|
|
|
/// AddType - Add a new type attribute to the specified entity.
|
|
void DwarfDebug::AddType(CompileUnit *DW_Unit, DIE *Entity, DIType Ty) {
|
|
if (Ty.isNull())
|
|
return;
|
|
|
|
// Check for pre-existence.
|
|
DIEEntry *&Slot = DW_Unit->getDIEEntrySlotFor(Ty.getNode());
|
|
|
|
// If it exists then use the existing value.
|
|
if (Slot) {
|
|
Entity->AddValue(dwarf::DW_AT_type, dwarf::DW_FORM_ref4, Slot);
|
|
return;
|
|
}
|
|
|
|
// Set up proxy.
|
|
Slot = CreateDIEEntry();
|
|
|
|
// Construct type.
|
|
DIE Buffer(dwarf::DW_TAG_base_type);
|
|
if (Ty.isBasicType())
|
|
ConstructTypeDIE(DW_Unit, Buffer, DIBasicType(Ty.getNode()));
|
|
else if (Ty.isCompositeType())
|
|
ConstructTypeDIE(DW_Unit, Buffer, DICompositeType(Ty.getNode()));
|
|
else {
|
|
assert(Ty.isDerivedType() && "Unknown kind of DIType");
|
|
ConstructTypeDIE(DW_Unit, Buffer, DIDerivedType(Ty.getNode()));
|
|
}
|
|
|
|
// Add debug information entry to entity and appropriate context.
|
|
DIE *Die = NULL;
|
|
DIDescriptor Context = Ty.getContext();
|
|
if (!Context.isNull())
|
|
Die = DW_Unit->getDieMapSlotFor(Context.getNode());
|
|
|
|
if (Die) {
|
|
DIE *Child = new DIE(Buffer);
|
|
Die->AddChild(Child);
|
|
Buffer.Detach();
|
|
SetDIEEntry(Slot, Child);
|
|
} else {
|
|
Die = DW_Unit->AddDie(Buffer);
|
|
SetDIEEntry(Slot, Die);
|
|
}
|
|
|
|
Entity->AddValue(dwarf::DW_AT_type, dwarf::DW_FORM_ref4, Slot);
|
|
}
|
|
|
|
/// ConstructTypeDIE - Construct basic type die from DIBasicType.
|
|
void DwarfDebug::ConstructTypeDIE(CompileUnit *DW_Unit, DIE &Buffer,
|
|
DIBasicType BTy) {
|
|
// Get core information.
|
|
const char *Name = BTy.getName();
|
|
Buffer.setTag(dwarf::DW_TAG_base_type);
|
|
AddUInt(&Buffer, dwarf::DW_AT_encoding, dwarf::DW_FORM_data1,
|
|
BTy.getEncoding());
|
|
|
|
// Add name if not anonymous or intermediate type.
|
|
if (Name)
|
|
AddString(&Buffer, dwarf::DW_AT_name, dwarf::DW_FORM_string, Name);
|
|
uint64_t Size = BTy.getSizeInBits() >> 3;
|
|
AddUInt(&Buffer, dwarf::DW_AT_byte_size, 0, Size);
|
|
}
|
|
|
|
/// ConstructTypeDIE - Construct derived type die from DIDerivedType.
|
|
void DwarfDebug::ConstructTypeDIE(CompileUnit *DW_Unit, DIE &Buffer,
|
|
DIDerivedType DTy) {
|
|
// Get core information.
|
|
const char *Name = DTy.getName();
|
|
uint64_t Size = DTy.getSizeInBits() >> 3;
|
|
unsigned Tag = DTy.getTag();
|
|
|
|
// FIXME - Workaround for templates.
|
|
if (Tag == dwarf::DW_TAG_inheritance) Tag = dwarf::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)
|
|
AddString(&Buffer, dwarf::DW_AT_name, dwarf::DW_FORM_string, Name);
|
|
|
|
// Add size if non-zero (derived types might be zero-sized.)
|
|
if (Size)
|
|
AddUInt(&Buffer, dwarf::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 DwarfDebug::ConstructTypeDIE(CompileUnit *DW_Unit, DIE &Buffer,
|
|
DICompositeType CTy) {
|
|
// Get core information.
|
|
const char *Name = CTy.getName();
|
|
|
|
uint64_t Size = CTy.getSizeInBits() >> 3;
|
|
unsigned Tag = CTy.getTag();
|
|
Buffer.setTag(Tag);
|
|
|
|
switch (Tag) {
|
|
case dwarf::DW_TAG_vector_type:
|
|
case dwarf::DW_TAG_array_type:
|
|
ConstructArrayTypeDIE(DW_Unit, Buffer, &CTy);
|
|
break;
|
|
case dwarf::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).getNode());
|
|
if (!Enum.isNull()) {
|
|
ElemDie = ConstructEnumTypeDIE(DW_Unit, &Enum);
|
|
Buffer.AddChild(ElemDie);
|
|
}
|
|
}
|
|
}
|
|
break;
|
|
case dwarf::DW_TAG_subroutine_type: {
|
|
// Add return type.
|
|
DIArray Elements = CTy.getTypeArray();
|
|
DIDescriptor RTy = Elements.getElement(0);
|
|
AddType(DW_Unit, &Buffer, DIType(RTy.getNode()));
|
|
|
|
// Add prototype flag.
|
|
AddUInt(&Buffer, dwarf::DW_AT_prototyped, dwarf::DW_FORM_flag, 1);
|
|
|
|
// Add arguments.
|
|
for (unsigned i = 1, N = Elements.getNumElements(); i < N; ++i) {
|
|
DIE *Arg = new DIE(dwarf::DW_TAG_formal_parameter);
|
|
DIDescriptor Ty = Elements.getElement(i);
|
|
AddType(DW_Unit, Arg, DIType(Ty.getNode()));
|
|
Buffer.AddChild(Arg);
|
|
}
|
|
}
|
|
break;
|
|
case dwarf::DW_TAG_structure_type:
|
|
case dwarf::DW_TAG_union_type:
|
|
case dwarf::DW_TAG_class_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);
|
|
if (Element.isNull())
|
|
continue;
|
|
DIE *ElemDie = NULL;
|
|
if (Element.getTag() == dwarf::DW_TAG_subprogram)
|
|
ElemDie = CreateSubprogramDIE(DW_Unit,
|
|
DISubprogram(Element.getNode()));
|
|
else
|
|
ElemDie = CreateMemberDIE(DW_Unit,
|
|
DIDerivedType(Element.getNode()));
|
|
Buffer.AddChild(ElemDie);
|
|
}
|
|
|
|
if (CTy.isAppleBlockExtension())
|
|
AddUInt(&Buffer, dwarf::DW_AT_APPLE_block, dwarf::DW_FORM_flag, 1);
|
|
|
|
unsigned RLang = CTy.getRunTimeLang();
|
|
if (RLang)
|
|
AddUInt(&Buffer, dwarf::DW_AT_APPLE_runtime_class,
|
|
dwarf::DW_FORM_data1, RLang);
|
|
break;
|
|
}
|
|
default:
|
|
break;
|
|
}
|
|
|
|
// Add name if not anonymous or intermediate type.
|
|
if (Name)
|
|
AddString(&Buffer, dwarf::DW_AT_name, dwarf::DW_FORM_string, Name);
|
|
|
|
if (Tag == dwarf::DW_TAG_enumeration_type ||
|
|
Tag == dwarf::DW_TAG_structure_type || Tag == dwarf::DW_TAG_union_type) {
|
|
// Add size if non-zero (derived types might be zero-sized.)
|
|
if (Size)
|
|
AddUInt(&Buffer, dwarf::DW_AT_byte_size, 0, Size);
|
|
else {
|
|
// Add zero size if it is not a forward declaration.
|
|
if (CTy.isForwardDecl())
|
|
AddUInt(&Buffer, dwarf::DW_AT_declaration, dwarf::DW_FORM_flag, 1);
|
|
else
|
|
AddUInt(&Buffer, dwarf::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 DwarfDebug::ConstructSubrangeDIE(DIE &Buffer, DISubrange SR, DIE *IndexTy){
|
|
int64_t L = SR.getLo();
|
|
int64_t H = SR.getHi();
|
|
DIE *DW_Subrange = new DIE(dwarf::DW_TAG_subrange_type);
|
|
|
|
AddDIEEntry(DW_Subrange, dwarf::DW_AT_type, dwarf::DW_FORM_ref4, IndexTy);
|
|
if (L)
|
|
AddSInt(DW_Subrange, dwarf::DW_AT_lower_bound, 0, L);
|
|
if (H)
|
|
AddSInt(DW_Subrange, dwarf::DW_AT_upper_bound, 0, H);
|
|
|
|
Buffer.AddChild(DW_Subrange);
|
|
}
|
|
|
|
/// ConstructArrayTypeDIE - Construct array type DIE from DICompositeType.
|
|
void DwarfDebug::ConstructArrayTypeDIE(CompileUnit *DW_Unit, DIE &Buffer,
|
|
DICompositeType *CTy) {
|
|
Buffer.setTag(dwarf::DW_TAG_array_type);
|
|
if (CTy->getTag() == dwarf::DW_TAG_vector_type)
|
|
AddUInt(&Buffer, dwarf::DW_AT_GNU_vector, dwarf::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(dwarf::DW_TAG_base_type);
|
|
AddUInt(&IdxBuffer, dwarf::DW_AT_byte_size, 0, sizeof(int32_t));
|
|
AddUInt(&IdxBuffer, dwarf::DW_AT_encoding, dwarf::DW_FORM_data1,
|
|
dwarf::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.getNode()), IndexTy);
|
|
}
|
|
}
|
|
|
|
/// ConstructEnumTypeDIE - Construct enum type DIE from DIEnumerator.
|
|
DIE *DwarfDebug::ConstructEnumTypeDIE(CompileUnit *DW_Unit, DIEnumerator *ETy) {
|
|
DIE *Enumerator = new DIE(dwarf::DW_TAG_enumerator);
|
|
const char *Name = ETy->getName();
|
|
AddString(Enumerator, dwarf::DW_AT_name, dwarf::DW_FORM_string, Name);
|
|
int64_t Value = ETy->getEnumValue();
|
|
AddSInt(Enumerator, dwarf::DW_AT_const_value, dwarf::DW_FORM_sdata, Value);
|
|
return Enumerator;
|
|
}
|
|
|
|
/// CreateGlobalVariableDIE - Create new DIE using GV.
|
|
DIE *DwarfDebug::CreateGlobalVariableDIE(CompileUnit *DW_Unit,
|
|
const DIGlobalVariable &GV) {
|
|
DIE *GVDie = new DIE(dwarf::DW_TAG_variable);
|
|
AddString(GVDie, dwarf::DW_AT_name, dwarf::DW_FORM_string,
|
|
GV.getDisplayName());
|
|
|
|
const char *LinkageName = GV.getLinkageName();
|
|
if (LinkageName) {
|
|
// Skip special LLVM prefix that is used to inform the asm printer to not
|
|
// emit usual symbol prefix before the symbol name. This happens for
|
|
// Objective-C symbol names and symbol whose name is replaced using GCC's
|
|
// __asm__ attribute.
|
|
if (LinkageName[0] == 1)
|
|
LinkageName = &LinkageName[1];
|
|
AddString(GVDie, dwarf::DW_AT_MIPS_linkage_name, dwarf::DW_FORM_string,
|
|
LinkageName);
|
|
}
|
|
AddType(DW_Unit, GVDie, GV.getType());
|
|
if (!GV.isLocalToUnit())
|
|
AddUInt(GVDie, dwarf::DW_AT_external, dwarf::DW_FORM_flag, 1);
|
|
AddSourceLine(GVDie, &GV);
|
|
|
|
// Add address.
|
|
DIEBlock *Block = new DIEBlock();
|
|
AddUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_addr);
|
|
AddObjectLabel(Block, 0, dwarf::DW_FORM_udata,
|
|
Asm->Mang->getMangledName(GV.getGlobal()));
|
|
AddBlock(GVDie, dwarf::DW_AT_location, 0, Block);
|
|
|
|
return GVDie;
|
|
}
|
|
|
|
/// CreateMemberDIE - Create new member DIE.
|
|
DIE *DwarfDebug::CreateMemberDIE(CompileUnit *DW_Unit, const DIDerivedType &DT){
|
|
DIE *MemberDie = new DIE(DT.getTag());
|
|
if (const char *Name = DT.getName())
|
|
AddString(MemberDie, dwarf::DW_AT_name, dwarf::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, dwarf::DW_AT_byte_size, 0, DT.getOriginalTypeSize()>>3);
|
|
AddUInt(MemberDie, dwarf::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, dwarf::DW_AT_bit_offset, 0, Offset);
|
|
}
|
|
|
|
DIEBlock *Block = new DIEBlock();
|
|
AddUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_plus_uconst);
|
|
AddUInt(Block, 0, dwarf::DW_FORM_udata, DT.getOffsetInBits() >> 3);
|
|
AddBlock(MemberDie, dwarf::DW_AT_data_member_location, 0, Block);
|
|
|
|
if (DT.isProtected())
|
|
AddUInt(MemberDie, dwarf::DW_AT_accessibility, 0,
|
|
dwarf::DW_ACCESS_protected);
|
|
else if (DT.isPrivate())
|
|
AddUInt(MemberDie, dwarf::DW_AT_accessibility, 0,
|
|
dwarf::DW_ACCESS_private);
|
|
|
|
return MemberDie;
|
|
}
|
|
|
|
/// CreateSubprogramDIE - Create new DIE using SP.
|
|
DIE *DwarfDebug::CreateSubprogramDIE(CompileUnit *DW_Unit,
|
|
const DISubprogram &SP,
|
|
bool IsConstructor,
|
|
bool IsInlined) {
|
|
DIE *SPDie = new DIE(dwarf::DW_TAG_subprogram);
|
|
|
|
const char * Name = SP.getName();
|
|
AddString(SPDie, dwarf::DW_AT_name, dwarf::DW_FORM_string, Name);
|
|
|
|
const char *LinkageName = SP.getLinkageName();
|
|
if (LinkageName) {
|
|
// Skip special LLVM prefix that is used to inform the asm printer to not emit
|
|
// usual symbol prefix before the symbol name. This happens for Objective-C
|
|
// symbol names and symbol whose name is replaced using GCC's __asm__ attribute.
|
|
if (LinkageName[0] == 1)
|
|
LinkageName = &LinkageName[1];
|
|
AddString(SPDie, dwarf::DW_AT_MIPS_linkage_name, dwarf::DW_FORM_string,
|
|
LinkageName);
|
|
}
|
|
AddSourceLine(SPDie, &SP);
|
|
|
|
DICompositeType SPTy = SP.getType();
|
|
DIArray Args = SPTy.getTypeArray();
|
|
|
|
// Add prototyped tag, if C or ObjC.
|
|
unsigned Lang = SP.getCompileUnit().getLanguage();
|
|
if (Lang == dwarf::DW_LANG_C99 || Lang == dwarf::DW_LANG_C89 ||
|
|
Lang == dwarf::DW_LANG_ObjC)
|
|
AddUInt(SPDie, dwarf::DW_AT_prototyped, dwarf::DW_FORM_flag, 1);
|
|
|
|
// Add Return Type.
|
|
unsigned SPTag = SPTy.getTag();
|
|
if (!IsConstructor) {
|
|
if (Args.isNull() || SPTag != dwarf::DW_TAG_subroutine_type)
|
|
AddType(DW_Unit, SPDie, SPTy);
|
|
else
|
|
AddType(DW_Unit, SPDie, DIType(Args.getElement(0).getNode()));
|
|
}
|
|
|
|
if (!SP.isDefinition()) {
|
|
AddUInt(SPDie, dwarf::DW_AT_declaration, dwarf::DW_FORM_flag, 1);
|
|
|
|
// Add arguments. Do not add arguments for subprogram definition. They will
|
|
// be handled through RecordVariable.
|
|
if (SPTag == dwarf::DW_TAG_subroutine_type)
|
|
for (unsigned i = 1, N = Args.getNumElements(); i < N; ++i) {
|
|
DIE *Arg = new DIE(dwarf::DW_TAG_formal_parameter);
|
|
AddType(DW_Unit, Arg, DIType(Args.getElement(i).getNode()));
|
|
AddUInt(Arg, dwarf::DW_AT_artificial, dwarf::DW_FORM_flag, 1); // ??
|
|
SPDie->AddChild(Arg);
|
|
}
|
|
}
|
|
|
|
if (!SP.isLocalToUnit() && !IsInlined)
|
|
AddUInt(SPDie, dwarf::DW_AT_external, dwarf::DW_FORM_flag, 1);
|
|
|
|
// DW_TAG_inlined_subroutine may refer to this DIE.
|
|
DIE *&Slot = DW_Unit->getDieMapSlotFor(SP.getNode());
|
|
Slot = SPDie;
|
|
return SPDie;
|
|
}
|
|
|
|
/// FindCompileUnit - Get the compile unit for the given descriptor.
|
|
///
|
|
CompileUnit &DwarfDebug::FindCompileUnit(DICompileUnit Unit) const {
|
|
DenseMap<Value *, CompileUnit *>::const_iterator I =
|
|
CompileUnitMap.find(Unit.getNode());
|
|
assert(I != CompileUnitMap.end() && "Missing compile unit.");
|
|
return *I->second;
|
|
}
|
|
|
|
/// CreateDbgScopeVariable - Create a new scope variable.
|
|
///
|
|
DIE *DwarfDebug::CreateDbgScopeVariable(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 dwarf::DW_TAG_return_variable:
|
|
return NULL;
|
|
case dwarf::DW_TAG_arg_variable:
|
|
Tag = dwarf::DW_TAG_formal_parameter;
|
|
break;
|
|
case dwarf::DW_TAG_auto_variable: // fall thru
|
|
default:
|
|
Tag = dwarf::DW_TAG_variable;
|
|
break;
|
|
}
|
|
|
|
// Define variable debug information entry.
|
|
DIE *VariableDie = new DIE(Tag);
|
|
const char *Name = VD.getName();
|
|
AddString(VariableDie, dwarf::DW_AT_name, dwarf::DW_FORM_string, Name);
|
|
|
|
// Add source line info if available.
|
|
AddSourceLine(VariableDie, &VD);
|
|
|
|
// Add variable type.
|
|
// FIXME: isBlockByrefVariable should be reformulated in terms of complex addresses instead.
|
|
if (VD.isBlockByrefVariable())
|
|
AddType(Unit, VariableDie, GetBlockByrefType(VD.getType(), Name));
|
|
else
|
|
AddType(Unit, VariableDie, VD.getType());
|
|
|
|
// Add variable address.
|
|
if (!DV->isInlinedFnVar()) {
|
|
// Variables for abstract instances of inlined functions don't get a
|
|
// location.
|
|
MachineLocation Location;
|
|
Location.set(RI->getFrameRegister(*MF),
|
|
RI->getFrameIndexOffset(*MF, DV->getFrameIndex()));
|
|
|
|
|
|
if (VD.hasComplexAddress())
|
|
AddComplexAddress(DV, VariableDie, dwarf::DW_AT_location, Location);
|
|
else if (VD.isBlockByrefVariable())
|
|
AddBlockByrefAddress(DV, VariableDie, dwarf::DW_AT_location, Location);
|
|
else
|
|
AddAddress(VariableDie, dwarf::DW_AT_location, Location);
|
|
}
|
|
|
|
return VariableDie;
|
|
}
|
|
|
|
/// getOrCreateScope - Returns the scope associated with the given descriptor.
|
|
///
|
|
DbgScope *DwarfDebug::getDbgScope(MDNode *N, const MachineInstr *MI) {
|
|
DbgScope *&Slot = DbgScopeMap[N];
|
|
if (Slot) return Slot;
|
|
|
|
DbgScope *Parent = NULL;
|
|
|
|
DIDescriptor Scope(N);
|
|
if (Scope.isCompileUnit()) {
|
|
return NULL;
|
|
} else if (Scope.isSubprogram()) {
|
|
DISubprogram SP(N);
|
|
DIDescriptor ParentDesc = SP.getContext();
|
|
if (!ParentDesc.isNull() && !ParentDesc.isCompileUnit())
|
|
Parent = getDbgScope(ParentDesc.getNode(), MI);
|
|
} else if (Scope.isLexicalBlock()) {
|
|
DILexicalBlock DB(N);
|
|
DIDescriptor ParentDesc = DB.getContext();
|
|
if (!ParentDesc.isNull())
|
|
Parent = getDbgScope(ParentDesc.getNode(), MI);
|
|
} else
|
|
assert (0 && "Unexpected scope info");
|
|
|
|
Slot = new DbgScope(Parent, DIDescriptor(N));
|
|
Slot->setFirstInsn(MI);
|
|
|
|
if (Parent)
|
|
Parent->AddScope(Slot);
|
|
else
|
|
// First function is top level function.
|
|
if (!FunctionDbgScope)
|
|
FunctionDbgScope = Slot;
|
|
|
|
return Slot;
|
|
}
|
|
|
|
|
|
/// getOrCreateScope - Returns the scope associated with the given descriptor.
|
|
/// FIXME - Remove this method.
|
|
DbgScope *DwarfDebug::getOrCreateScope(MDNode *N) {
|
|
DbgScope *&Slot = DbgScopeMap[N];
|
|
if (Slot) return Slot;
|
|
|
|
DbgScope *Parent = NULL;
|
|
DILexicalBlock Block(N);
|
|
|
|
// Don't create a new scope if we already created one for an inlined function.
|
|
DenseMap<const MDNode *, DbgScope *>::iterator
|
|
II = AbstractInstanceRootMap.find(N);
|
|
if (II != AbstractInstanceRootMap.end())
|
|
return LexicalScopeStack.back();
|
|
|
|
if (!Block.isNull()) {
|
|
DIDescriptor ParentDesc = Block.getContext();
|
|
Parent =
|
|
ParentDesc.isNull() ? NULL : getOrCreateScope(ParentDesc.getNode());
|
|
}
|
|
|
|
Slot = new DbgScope(Parent, DIDescriptor(N));
|
|
|
|
if (Parent)
|
|
Parent->AddScope(Slot);
|
|
else
|
|
// First function is top level function.
|
|
FunctionDbgScope = Slot;
|
|
|
|
return Slot;
|
|
}
|
|
|
|
/// ConstructDbgScope - Construct the components of a scope.
|
|
///
|
|
void DwarfDebug::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 = CreateDbgScopeVariable(Variables[i], Unit);
|
|
if (VariableDie) ParentDie->AddChild(VariableDie);
|
|
}
|
|
|
|
// Add concrete instances to scope.
|
|
SmallVector<DbgConcreteScope *, 8> &ConcreteInsts =
|
|
ParentScope->getConcreteInsts();
|
|
for (unsigned i = 0, N = ConcreteInsts.size(); i < N; ++i) {
|
|
DbgConcreteScope *ConcreteInst = ConcreteInsts[i];
|
|
DIE *Die = ConcreteInst->getDie();
|
|
|
|
unsigned StartID = ConcreteInst->getStartLabelID();
|
|
unsigned EndID = ConcreteInst->getEndLabelID();
|
|
|
|
// Add the scope bounds.
|
|
if (StartID)
|
|
AddLabel(Die, dwarf::DW_AT_low_pc, dwarf::DW_FORM_addr,
|
|
DWLabel("label", StartID));
|
|
else
|
|
AddLabel(Die, dwarf::DW_AT_low_pc, dwarf::DW_FORM_addr,
|
|
DWLabel("func_begin", SubprogramCount));
|
|
|
|
if (EndID)
|
|
AddLabel(Die, dwarf::DW_AT_high_pc, dwarf::DW_FORM_addr,
|
|
DWLabel("label", EndID));
|
|
else
|
|
AddLabel(Die, dwarf::DW_AT_high_pc, dwarf::DW_FORM_addr,
|
|
DWLabel("func_end", SubprogramCount));
|
|
|
|
ParentDie->AddChild(Die);
|
|
}
|
|
|
|
// 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];
|
|
|
|
unsigned StartID = MMI->MappedLabel(Scope->getStartLabelID());
|
|
unsigned EndID = MMI->MappedLabel(Scope->getEndLabelID());
|
|
|
|
// Ignore empty scopes.
|
|
if (StartID == EndID && StartID != 0) continue;
|
|
|
|
// Do not ignore inlined scopes even if they don't have any variables or
|
|
// scopes.
|
|
if (Scope->getScopes().empty() && Scope->getVariables().empty() &&
|
|
Scope->getConcreteInsts().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(dwarf::DW_TAG_lexical_block);
|
|
|
|
// Add the scope bounds.
|
|
if (StartID)
|
|
AddLabel(ScopeDie, dwarf::DW_AT_low_pc, dwarf::DW_FORM_addr,
|
|
DWLabel("label", StartID));
|
|
else
|
|
AddLabel(ScopeDie, dwarf::DW_AT_low_pc, dwarf::DW_FORM_addr,
|
|
DWLabel("func_begin", SubprogramCount));
|
|
|
|
if (EndID)
|
|
AddLabel(ScopeDie, dwarf::DW_AT_high_pc, dwarf::DW_FORM_addr,
|
|
DWLabel("label", EndID));
|
|
else
|
|
AddLabel(ScopeDie, dwarf::DW_AT_high_pc, dwarf::DW_FORM_addr,
|
|
DWLabel("func_end", SubprogramCount));
|
|
|
|
// Add the scope's contents.
|
|
ConstructDbgScope(Scope, StartID, EndID, ScopeDie, Unit);
|
|
ParentDie->AddChild(ScopeDie);
|
|
}
|
|
}
|
|
}
|
|
|
|
/// ConstructFunctionDbgScope - Construct the scope for the subprogram.
|
|
///
|
|
void DwarfDebug::ConstructFunctionDbgScope(DbgScope *RootScope,
|
|
bool AbstractScope) {
|
|
// 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.getNode());
|
|
|
|
// Get the subprogram die.
|
|
DIE *SPDie = ModuleCU->getDieMapSlotFor(SPD.getNode());
|
|
if (!SPDie) {
|
|
ConstructSubprogram(SPD.getNode());
|
|
SPDie = ModuleCU->getDieMapSlotFor(SPD.getNode());
|
|
}
|
|
assert(SPDie && "Missing subprogram descriptor");
|
|
|
|
if (!AbstractScope) {
|
|
// Add the function bounds.
|
|
AddLabel(SPDie, dwarf::DW_AT_low_pc, dwarf::DW_FORM_addr,
|
|
DWLabel("func_begin", SubprogramCount));
|
|
AddLabel(SPDie, dwarf::DW_AT_high_pc, dwarf::DW_FORM_addr,
|
|
DWLabel("func_end", SubprogramCount));
|
|
MachineLocation Location(RI->getFrameRegister(*MF));
|
|
AddAddress(SPDie, dwarf::DW_AT_frame_base, Location);
|
|
}
|
|
|
|
ConstructDbgScope(RootScope, 0, 0, SPDie, ModuleCU);
|
|
// If there are global variables at this scope then add their dies.
|
|
for (SmallVector<WeakVH, 4>::iterator SGI = ScopedGVs.begin(),
|
|
SGE = ScopedGVs.end(); SGI != SGE; ++SGI) {
|
|
MDNode *N = dyn_cast_or_null<MDNode>(*SGI);
|
|
if (!N) continue;
|
|
DIGlobalVariable GV(N);
|
|
if (GV.getContext().getNode() == RootScope->getDesc().getNode()) {
|
|
DIE *ScopedGVDie = CreateGlobalVariableDIE(ModuleCU, GV);
|
|
SPDie->AddChild(ScopedGVDie);
|
|
}
|
|
}
|
|
}
|
|
|
|
/// ConstructDefaultDbgScope - Construct a default scope for the subprogram.
|
|
///
|
|
void DwarfDebug::ConstructDefaultDbgScope(MachineFunction *MF) {
|
|
StringMap<DIE*> &Globals = ModuleCU->getGlobals();
|
|
StringMap<DIE*>::iterator GI = Globals.find(MF->getFunction()->getName());
|
|
if (GI != Globals.end()) {
|
|
DIE *SPDie = GI->second;
|
|
|
|
// Add the function bounds.
|
|
AddLabel(SPDie, dwarf::DW_AT_low_pc, dwarf::DW_FORM_addr,
|
|
DWLabel("func_begin", SubprogramCount));
|
|
AddLabel(SPDie, dwarf::DW_AT_high_pc, dwarf::DW_FORM_addr,
|
|
DWLabel("func_end", SubprogramCount));
|
|
|
|
MachineLocation Location(RI->getFrameRegister(*MF));
|
|
AddAddress(SPDie, dwarf::DW_AT_frame_base, Location);
|
|
}
|
|
}
|
|
|
|
/// 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 DwarfDebug::GetOrCreateSourceID(const char *DirName,
|
|
const char *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 DwarfDebug::ConstructCompileUnit(MDNode *N) {
|
|
DICompileUnit DIUnit(N);
|
|
const char *FN = DIUnit.getFilename();
|
|
const char *Dir = DIUnit.getDirectory();
|
|
unsigned ID = GetOrCreateSourceID(Dir, FN);
|
|
|
|
DIE *Die = new DIE(dwarf::DW_TAG_compile_unit);
|
|
AddSectionOffset(Die, dwarf::DW_AT_stmt_list, dwarf::DW_FORM_data4,
|
|
DWLabel("section_line", 0), DWLabel("section_line", 0),
|
|
false);
|
|
AddString(Die, dwarf::DW_AT_producer, dwarf::DW_FORM_string,
|
|
DIUnit.getProducer());
|
|
AddUInt(Die, dwarf::DW_AT_language, dwarf::DW_FORM_data1,
|
|
DIUnit.getLanguage());
|
|
AddString(Die, dwarf::DW_AT_name, dwarf::DW_FORM_string, FN);
|
|
|
|
if (Dir)
|
|
AddString(Die, dwarf::DW_AT_comp_dir, dwarf::DW_FORM_string, Dir);
|
|
if (DIUnit.isOptimized())
|
|
AddUInt(Die, dwarf::DW_AT_APPLE_optimized, dwarf::DW_FORM_flag, 1);
|
|
|
|
if (const char *Flags = DIUnit.getFlags())
|
|
AddString(Die, dwarf::DW_AT_APPLE_flags, dwarf::DW_FORM_string, Flags);
|
|
|
|
unsigned RVer = DIUnit.getRunTimeVersion();
|
|
if (RVer)
|
|
AddUInt(Die, dwarf::DW_AT_APPLE_major_runtime_vers,
|
|
dwarf::DW_FORM_data1, RVer);
|
|
|
|
CompileUnit *Unit = new CompileUnit(ID, Die);
|
|
if (!ModuleCU && DIUnit.isMain()) {
|
|
// Use first compile unit marked as isMain as the compile unit
|
|
// for this module.
|
|
ModuleCU = Unit;
|
|
}
|
|
|
|
CompileUnitMap[DIUnit.getNode()] = Unit;
|
|
CompileUnits.push_back(Unit);
|
|
}
|
|
|
|
void DwarfDebug::ConstructGlobalVariableDIE(MDNode *N) {
|
|
DIGlobalVariable DI_GV(N);
|
|
|
|
// If debug information is malformed then ignore it.
|
|
if (DI_GV.Verify() == false)
|
|
return;
|
|
|
|
// Check for pre-existence.
|
|
DIE *&Slot = ModuleCU->getDieMapSlotFor(DI_GV.getNode());
|
|
if (Slot)
|
|
return;
|
|
|
|
DIE *VariableDie = CreateGlobalVariableDIE(ModuleCU, DI_GV);
|
|
|
|
// Add to map.
|
|
Slot = VariableDie;
|
|
|
|
// Add to context owner.
|
|
ModuleCU->getDie()->AddChild(VariableDie);
|
|
|
|
// Expose as global. FIXME - need to check external flag.
|
|
ModuleCU->AddGlobal(DI_GV.getName(), VariableDie);
|
|
return;
|
|
}
|
|
|
|
void DwarfDebug::ConstructSubprogram(MDNode *N) {
|
|
DISubprogram SP(N);
|
|
|
|
// Check for pre-existence.
|
|
DIE *&Slot = ModuleCU->getDieMapSlotFor(N);
|
|
if (Slot)
|
|
return;
|
|
|
|
if (!SP.isDefinition())
|
|
// This is a method declaration which will be handled while constructing
|
|
// class type.
|
|
return;
|
|
|
|
DIE *SubprogramDie = CreateSubprogramDIE(ModuleCU, SP);
|
|
|
|
// Add to map.
|
|
Slot = SubprogramDie;
|
|
|
|
// Add to context owner.
|
|
ModuleCU->getDie()->AddChild(SubprogramDie);
|
|
|
|
// Expose as global.
|
|
ModuleCU->AddGlobal(SP.getName(), SubprogramDie);
|
|
return;
|
|
}
|
|
|
|
/// BeginModule - Emit all Dwarf sections that should come prior to the
|
|
/// content. Create global DIEs and emit initial debug info sections.
|
|
/// This is inovked by the target AsmPrinter.
|
|
void DwarfDebug::BeginModule(Module *M, MachineModuleInfo *mmi) {
|
|
this->M = M;
|
|
|
|
if (TimePassesIsEnabled)
|
|
DebugTimer->startTimer();
|
|
|
|
DebugInfoFinder DbgFinder;
|
|
DbgFinder.processModule(*M);
|
|
|
|
// Create all the compile unit DIEs.
|
|
for (DebugInfoFinder::iterator I = DbgFinder.compile_unit_begin(),
|
|
E = DbgFinder.compile_unit_end(); I != E; ++I)
|
|
ConstructCompileUnit(*I);
|
|
|
|
if (CompileUnits.empty()) {
|
|
if (TimePassesIsEnabled)
|
|
DebugTimer->stopTimer();
|
|
|
|
return;
|
|
}
|
|
|
|
// If main compile unit for this module is not seen than randomly
|
|
// select first compile unit.
|
|
if (!ModuleCU)
|
|
ModuleCU = CompileUnits[0];
|
|
|
|
// Create DIEs for each of the externally visible global variables.
|
|
for (DebugInfoFinder::iterator I = DbgFinder.global_variable_begin(),
|
|
E = DbgFinder.global_variable_end(); I != E; ++I) {
|
|
DIGlobalVariable GV(*I);
|
|
if (GV.getContext().getNode() != GV.getCompileUnit().getNode())
|
|
ScopedGVs.push_back(*I);
|
|
else
|
|
ConstructGlobalVariableDIE(*I);
|
|
}
|
|
|
|
// Create DIEs for each of the externally visible subprograms.
|
|
for (DebugInfoFinder::iterator I = DbgFinder.subprogram_begin(),
|
|
E = DbgFinder.subprogram_end(); I != E; ++I)
|
|
ConstructSubprogram(*I);
|
|
|
|
MMI = mmi;
|
|
shouldEmit = true;
|
|
MMI->setDebugInfoAvailability(true);
|
|
|
|
// Prime section data.
|
|
SectionMap.insert(Asm->getObjFileLowering().getTextSection());
|
|
|
|
// Print out .file directives to specify files for .loc directives. These are
|
|
// printed out early so that they precede any .loc directives.
|
|
if (MAI->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.str());
|
|
Asm->EOL();
|
|
}
|
|
}
|
|
|
|
// Emit initial sections
|
|
EmitInitial();
|
|
|
|
if (TimePassesIsEnabled)
|
|
DebugTimer->stopTimer();
|
|
}
|
|
|
|
/// EndModule - Emit all Dwarf sections that should come after the content.
|
|
///
|
|
void DwarfDebug::EndModule() {
|
|
if (!ModuleCU)
|
|
return;
|
|
|
|
if (TimePassesIsEnabled)
|
|
DebugTimer->startTimer();
|
|
|
|
// Standard sections final addresses.
|
|
Asm->OutStreamer.SwitchSection(Asm->getObjFileLowering().getTextSection());
|
|
EmitLabel("text_end", 0);
|
|
Asm->OutStreamer.SwitchSection(Asm->getObjFileLowering().getDataSection());
|
|
EmitLabel("data_end", 0);
|
|
|
|
// End text sections.
|
|
for (unsigned i = 1, N = SectionMap.size(); i <= N; ++i) {
|
|
Asm->OutStreamer.SwitchSection(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();
|
|
|
|
// Emit inline info.
|
|
EmitDebugInlineInfo();
|
|
|
|
if (TimePassesIsEnabled)
|
|
DebugTimer->stopTimer();
|
|
}
|
|
|
|
/// CollectVariableInfo - Populate DbgScope entries with variables' info.
|
|
void DwarfDebug::CollectVariableInfo() {
|
|
if (!MMI) return;
|
|
MachineModuleInfo::VariableDbgInfoMapTy &VMap = MMI->getVariableDbgInfo();
|
|
for (MachineModuleInfo::VariableDbgInfoMapTy::iterator VI = VMap.begin(),
|
|
VE = VMap.end(); VI != VE; ++VI) {
|
|
MetadataBase *MB = VI->first;
|
|
MDNode *Var = dyn_cast_or_null<MDNode>(MB);
|
|
DIVariable DV (Var);
|
|
if (DV.isNull()) continue;
|
|
unsigned VSlot = VI->second;
|
|
DbgScope *Scope = getDbgScope(DV.getContext().getNode(), NULL);
|
|
Scope->AddVariable(new DbgVariable(DV, VSlot, false));
|
|
}
|
|
}
|
|
|
|
/// SetDbgScopeBeginLabels - Update DbgScope begin labels for the scopes that
|
|
/// start with this machine instruction.
|
|
void DwarfDebug::SetDbgScopeBeginLabels(const MachineInstr *MI, unsigned Label) {
|
|
InsnToDbgScopeMapTy::iterator I = DbgScopeBeginMap.find(MI);
|
|
if (I == DbgScopeBeginMap.end())
|
|
return;
|
|
SmallVector<DbgScope *, 2> &SD = I->second;
|
|
for (SmallVector<DbgScope *, 2>::iterator SDI = SD.begin(), SDE = SD.end();
|
|
SDI != SDE; ++SDI)
|
|
(*SDI)->setStartLabelID(Label);
|
|
}
|
|
|
|
/// SetDbgScopeEndLabels - Update DbgScope end labels for the scopes that
|
|
/// end with this machine instruction.
|
|
void DwarfDebug::SetDbgScopeEndLabels(const MachineInstr *MI, unsigned Label) {
|
|
InsnToDbgScopeMapTy::iterator I = DbgScopeEndMap.find(MI);
|
|
if (I == DbgScopeEndMap.end())
|
|
return;
|
|
SmallVector<DbgScope *, 2> &SD = I->second;
|
|
for (SmallVector<DbgScope *, 2>::iterator SDI = SD.begin(), SDE = SD.end();
|
|
SDI != SDE; ++SDI)
|
|
(*SDI)->setEndLabelID(Label);
|
|
}
|
|
|
|
/// ExtractScopeInformation - Scan machine instructions in this function
|
|
/// and collect DbgScopes. Return true, if atleast one scope was found.
|
|
bool DwarfDebug::ExtractScopeInformation(MachineFunction *MF) {
|
|
// If scope information was extracted using .dbg intrinsics then there is not
|
|
// any need to extract these information by scanning each instruction.
|
|
if (!DbgScopeMap.empty())
|
|
return false;
|
|
|
|
// Scan each instruction and create scopes.
|
|
for (MachineFunction::const_iterator I = MF->begin(), E = MF->end();
|
|
I != E; ++I) {
|
|
for (MachineBasicBlock::const_iterator II = I->begin(), IE = I->end();
|
|
II != IE; ++II) {
|
|
const MachineInstr *MInsn = II;
|
|
DebugLoc DL = MInsn->getDebugLoc();
|
|
if (DL.isUnknown())
|
|
continue;
|
|
DebugLocTuple DLT = MF->getDebugLocTuple(DL);
|
|
if (!DLT.Scope)
|
|
continue;
|
|
// There is no need to create another DIE for compile unit. For all
|
|
// other scopes, create one DbgScope now. This will be translated
|
|
// into a scope DIE at the end.
|
|
DIDescriptor D(DLT.Scope);
|
|
if (!D.isCompileUnit()) {
|
|
DbgScope *Scope = getDbgScope(DLT.Scope, MInsn);
|
|
Scope->setLastInsn(MInsn);
|
|
}
|
|
}
|
|
}
|
|
|
|
// If a scope's last instruction is not set then use its child scope's
|
|
// last instruction as this scope's last instrunction.
|
|
for (DenseMap<MDNode *, DbgScope *>::iterator DI = DbgScopeMap.begin(),
|
|
DE = DbgScopeMap.end(); DI != DE; ++DI) {
|
|
assert (DI->second->getFirstInsn() && "Invalid first instruction!");
|
|
DI->second->FixInstructionMarkers();
|
|
assert (DI->second->getLastInsn() && "Invalid last instruction!");
|
|
}
|
|
|
|
// Each scope has first instruction and last instruction to mark beginning
|
|
// and end of a scope respectively. Create an inverse map that list scopes
|
|
// starts (and ends) with an instruction. One instruction may start (or end)
|
|
// multiple scopes.
|
|
for (DenseMap<MDNode *, DbgScope *>::iterator DI = DbgScopeMap.begin(),
|
|
DE = DbgScopeMap.end(); DI != DE; ++DI) {
|
|
DbgScope *S = DI->second;
|
|
assert (S && "DbgScope is missing!");
|
|
const MachineInstr *MI = S->getFirstInsn();
|
|
assert (MI && "DbgScope does not have first instruction!");
|
|
|
|
InsnToDbgScopeMapTy::iterator IDI = DbgScopeBeginMap.find(MI);
|
|
if (IDI != DbgScopeBeginMap.end())
|
|
IDI->second.push_back(S);
|
|
else
|
|
DbgScopeBeginMap.insert(std::make_pair(MI,
|
|
SmallVector<DbgScope *, 2>(2, S)));
|
|
|
|
MI = S->getLastInsn();
|
|
assert (MI && "DbgScope does not have last instruction!");
|
|
IDI = DbgScopeEndMap.find(MI);
|
|
if (IDI != DbgScopeEndMap.end())
|
|
IDI->second.push_back(S);
|
|
else
|
|
DbgScopeEndMap.insert(std::make_pair(MI,
|
|
SmallVector<DbgScope *, 2>(2, S)));
|
|
}
|
|
|
|
return !DbgScopeMap.empty();
|
|
}
|
|
|
|
static DISubprogram getDISubprogram(MDNode *N) {
|
|
|
|
DIDescriptor D(N);
|
|
if (D.isNull())
|
|
return DISubprogram();
|
|
|
|
if (D.isCompileUnit())
|
|
return DISubprogram();
|
|
|
|
if (D.isSubprogram())
|
|
return DISubprogram(N);
|
|
|
|
if (D.isLexicalBlock())
|
|
return getDISubprogram(DILexicalBlock(N).getContext().getNode());
|
|
|
|
llvm_unreachable("Unexpected Descriptor!");
|
|
}
|
|
|
|
/// BeginFunction - Gather pre-function debug information. Assumes being
|
|
/// emitted immediately after the function entry point.
|
|
void DwarfDebug::BeginFunction(MachineFunction *MF) {
|
|
this->MF = MF;
|
|
|
|
if (!ShouldEmitDwarfDebug()) return;
|
|
|
|
if (TimePassesIsEnabled)
|
|
DebugTimer->startTimer();
|
|
|
|
#ifdef ATTACH_DEBUG_INFO_TO_AN_INSN
|
|
if (!ExtractScopeInformation(MF))
|
|
return;
|
|
CollectVariableInfo();
|
|
#endif
|
|
|
|
// 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.
|
|
#ifdef ATTACH_DEBUG_INFO_TO_AN_INSN
|
|
DebugLoc FDL = MF->getDefaultDebugLoc();
|
|
if (!FDL.isUnknown()) {
|
|
DebugLocTuple DLT = MF->getDebugLocTuple(FDL);
|
|
unsigned LabelID = 0;
|
|
DISubprogram SP = getDISubprogram(DLT.Scope);
|
|
if (!SP.isNull())
|
|
LabelID = RecordSourceLine(SP.getLineNumber(), 0, DLT.Scope);
|
|
else
|
|
LabelID = RecordSourceLine(DLT.Line, DLT.Col, DLT.Scope);
|
|
Asm->printLabel(LabelID);
|
|
O << '\n';
|
|
}
|
|
#else
|
|
DebugLoc FDL = MF->getDefaultDebugLoc();
|
|
if (!FDL.isUnknown()) {
|
|
DebugLocTuple DLT = MF->getDebugLocTuple(FDL);
|
|
unsigned LabelID = RecordSourceLine(DLT.Line, DLT.Col, DLT.Scope);
|
|
Asm->printLabel(LabelID);
|
|
O << '\n';
|
|
}
|
|
#endif
|
|
if (TimePassesIsEnabled)
|
|
DebugTimer->stopTimer();
|
|
}
|
|
|
|
/// EndFunction - Gather and emit post-function debug information.
|
|
///
|
|
void DwarfDebug::EndFunction(MachineFunction *MF) {
|
|
if (!ShouldEmitDwarfDebug()) return;
|
|
|
|
if (TimePassesIsEnabled)
|
|
DebugTimer->startTimer();
|
|
|
|
#ifdef ATTACH_DEBUG_INFO_TO_AN_INSN
|
|
if (DbgScopeMap.empty())
|
|
return;
|
|
#endif
|
|
// 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->getCurrentSection());
|
|
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 the DbgScope for abstract instances.
|
|
for (SmallVector<DbgScope *, 32>::iterator
|
|
I = AbstractInstanceRootList.begin(),
|
|
E = AbstractInstanceRootList.end(); I != E; ++I)
|
|
ConstructFunctionDbgScope(*I);
|
|
|
|
// Construct scopes for subprogram.
|
|
if (FunctionDbgScope)
|
|
ConstructFunctionDbgScope(FunctionDbgScope);
|
|
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 (FunctionDbgScope) {
|
|
delete FunctionDbgScope;
|
|
DbgScopeMap.clear();
|
|
DbgScopeBeginMap.clear();
|
|
DbgScopeEndMap.clear();
|
|
DbgAbstractScopeMap.clear();
|
|
DbgConcreteScopeMap.clear();
|
|
FunctionDbgScope = NULL;
|
|
LexicalScopeStack.clear();
|
|
AbstractInstanceRootList.clear();
|
|
AbstractInstanceRootMap.clear();
|
|
}
|
|
|
|
Lines.clear();
|
|
|
|
if (TimePassesIsEnabled)
|
|
DebugTimer->stopTimer();
|
|
}
|
|
|
|
/// 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 DwarfDebug::RecordSourceLine(unsigned Line, unsigned Col,
|
|
MDNode *S) {
|
|
if (!MMI)
|
|
return 0;
|
|
|
|
if (TimePassesIsEnabled)
|
|
DebugTimer->startTimer();
|
|
|
|
const char *Dir = NULL;
|
|
const char *Fn = NULL;
|
|
|
|
DIDescriptor Scope(S);
|
|
if (Scope.isCompileUnit()) {
|
|
DICompileUnit CU(S);
|
|
Dir = CU.getDirectory();
|
|
Fn = CU.getFilename();
|
|
} else if (Scope.isSubprogram()) {
|
|
DISubprogram SP(S);
|
|
Dir = SP.getDirectory();
|
|
Fn = SP.getFilename();
|
|
} else if (Scope.isLexicalBlock()) {
|
|
DILexicalBlock DB(S);
|
|
Dir = DB.getDirectory();
|
|
Fn = DB.getFilename();
|
|
} else
|
|
assert (0 && "Unexpected scope info");
|
|
|
|
unsigned Src = GetOrCreateSourceID(Dir, Fn);
|
|
unsigned ID = MMI->NextLabelID();
|
|
Lines.push_back(SrcLineInfo(Line, Col, Src, ID));
|
|
|
|
if (TimePassesIsEnabled)
|
|
DebugTimer->stopTimer();
|
|
|
|
return ID;
|
|
}
|
|
|
|
/// 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 DwarfDebug::getOrCreateSourceID(const std::string &DirName,
|
|
const std::string &FileName) {
|
|
if (TimePassesIsEnabled)
|
|
DebugTimer->startTimer();
|
|
|
|
unsigned SrcId = GetOrCreateSourceID(DirName.c_str(), FileName.c_str());
|
|
|
|
if (TimePassesIsEnabled)
|
|
DebugTimer->stopTimer();
|
|
|
|
return SrcId;
|
|
}
|
|
|
|
/// RecordRegionStart - Indicate the start of a region.
|
|
unsigned DwarfDebug::RecordRegionStart(MDNode *N) {
|
|
if (TimePassesIsEnabled)
|
|
DebugTimer->startTimer();
|
|
|
|
DbgScope *Scope = getOrCreateScope(N);
|
|
unsigned ID = MMI->NextLabelID();
|
|
if (!Scope->getStartLabelID()) Scope->setStartLabelID(ID);
|
|
LexicalScopeStack.push_back(Scope);
|
|
|
|
if (TimePassesIsEnabled)
|
|
DebugTimer->stopTimer();
|
|
|
|
return ID;
|
|
}
|
|
|
|
/// RecordRegionEnd - Indicate the end of a region.
|
|
unsigned DwarfDebug::RecordRegionEnd(MDNode *N) {
|
|
if (TimePassesIsEnabled)
|
|
DebugTimer->startTimer();
|
|
|
|
DbgScope *Scope = getOrCreateScope(N);
|
|
unsigned ID = MMI->NextLabelID();
|
|
Scope->setEndLabelID(ID);
|
|
// FIXME : region.end() may not be in the last basic block.
|
|
// For now, do not pop last lexical scope because next basic
|
|
// block may start new inlined function's body.
|
|
unsigned LSSize = LexicalScopeStack.size();
|
|
if (LSSize != 0 && LSSize != 1)
|
|
LexicalScopeStack.pop_back();
|
|
|
|
if (TimePassesIsEnabled)
|
|
DebugTimer->stopTimer();
|
|
|
|
return ID;
|
|
}
|
|
|
|
/// RecordVariable - Indicate the declaration of a local variable.
|
|
void DwarfDebug::RecordVariable(MDNode *N, unsigned FrameIndex) {
|
|
if (TimePassesIsEnabled)
|
|
DebugTimer->startTimer();
|
|
|
|
DIDescriptor Desc(N);
|
|
DbgScope *Scope = NULL;
|
|
bool InlinedFnVar = false;
|
|
|
|
if (Desc.getTag() == dwarf::DW_TAG_variable)
|
|
Scope = getOrCreateScope(DIGlobalVariable(N).getContext().getNode());
|
|
else {
|
|
bool InlinedVar = false;
|
|
MDNode *Context = DIVariable(N).getContext().getNode();
|
|
DISubprogram SP(Context);
|
|
if (!SP.isNull()) {
|
|
// SP is inserted into DbgAbstractScopeMap when inlined function
|
|
// start was recorded by RecordInlineFnStart.
|
|
DenseMap<MDNode *, DbgScope *>::iterator
|
|
I = DbgAbstractScopeMap.find(SP.getNode());
|
|
if (I != DbgAbstractScopeMap.end()) {
|
|
InlinedVar = true;
|
|
Scope = I->second;
|
|
}
|
|
}
|
|
if (!InlinedVar)
|
|
Scope = getOrCreateScope(Context);
|
|
}
|
|
|
|
assert(Scope && "Unable to find the variable's scope");
|
|
DbgVariable *DV = new DbgVariable(DIVariable(N), FrameIndex, InlinedFnVar);
|
|
Scope->AddVariable(DV);
|
|
|
|
if (TimePassesIsEnabled)
|
|
DebugTimer->stopTimer();
|
|
}
|
|
|
|
//// RecordInlinedFnStart - Indicate the start of inlined subroutine.
|
|
unsigned DwarfDebug::RecordInlinedFnStart(DISubprogram &SP, DICompileUnit CU,
|
|
unsigned Line, unsigned Col) {
|
|
unsigned LabelID = MMI->NextLabelID();
|
|
|
|
if (!MAI->doesDwarfUsesInlineInfoSection())
|
|
return LabelID;
|
|
|
|
if (TimePassesIsEnabled)
|
|
DebugTimer->startTimer();
|
|
|
|
MDNode *Node = SP.getNode();
|
|
DenseMap<const MDNode *, DbgScope *>::iterator
|
|
II = AbstractInstanceRootMap.find(Node);
|
|
|
|
if (II == AbstractInstanceRootMap.end()) {
|
|
// Create an abstract instance entry for this inlined function if it doesn't
|
|
// already exist.
|
|
DbgScope *Scope = new DbgScope(NULL, DIDescriptor(Node));
|
|
|
|
// Get the compile unit context.
|
|
DIE *SPDie = ModuleCU->getDieMapSlotFor(Node);
|
|
if (!SPDie)
|
|
SPDie = CreateSubprogramDIE(ModuleCU, SP, false, true);
|
|
|
|
// Mark as being inlined. This makes this subprogram entry an abstract
|
|
// instance root.
|
|
// FIXME: Our debugger doesn't care about the value of DW_AT_inline, only
|
|
// that it's defined. That probably won't change in the future. However,
|
|
// this could be more elegant.
|
|
AddUInt(SPDie, dwarf::DW_AT_inline, 0, dwarf::DW_INL_declared_not_inlined);
|
|
|
|
// Keep track of the abstract scope for this function.
|
|
DbgAbstractScopeMap[Node] = Scope;
|
|
|
|
AbstractInstanceRootMap[Node] = Scope;
|
|
AbstractInstanceRootList.push_back(Scope);
|
|
}
|
|
|
|
// Create a concrete inlined instance for this inlined function.
|
|
DbgConcreteScope *ConcreteScope = new DbgConcreteScope(DIDescriptor(Node));
|
|
DIE *ScopeDie = new DIE(dwarf::DW_TAG_inlined_subroutine);
|
|
ScopeDie->setAbstractCompileUnit(ModuleCU);
|
|
|
|
DIE *Origin = ModuleCU->getDieMapSlotFor(Node);
|
|
AddDIEEntry(ScopeDie, dwarf::DW_AT_abstract_origin,
|
|
dwarf::DW_FORM_ref4, Origin);
|
|
AddUInt(ScopeDie, dwarf::DW_AT_call_file, 0, ModuleCU->getID());
|
|
AddUInt(ScopeDie, dwarf::DW_AT_call_line, 0, Line);
|
|
AddUInt(ScopeDie, dwarf::DW_AT_call_column, 0, Col);
|
|
|
|
ConcreteScope->setDie(ScopeDie);
|
|
ConcreteScope->setStartLabelID(LabelID);
|
|
MMI->RecordUsedDbgLabel(LabelID);
|
|
|
|
LexicalScopeStack.back()->AddConcreteInst(ConcreteScope);
|
|
|
|
// Keep track of the concrete scope that's inlined into this function.
|
|
DenseMap<MDNode *, SmallVector<DbgScope *, 8> >::iterator
|
|
SI = DbgConcreteScopeMap.find(Node);
|
|
|
|
if (SI == DbgConcreteScopeMap.end())
|
|
DbgConcreteScopeMap[Node].push_back(ConcreteScope);
|
|
else
|
|
SI->second.push_back(ConcreteScope);
|
|
|
|
// Track the start label for this inlined function.
|
|
DenseMap<MDNode *, SmallVector<unsigned, 4> >::iterator
|
|
I = InlineInfo.find(Node);
|
|
|
|
if (I == InlineInfo.end())
|
|
InlineInfo[Node].push_back(LabelID);
|
|
else
|
|
I->second.push_back(LabelID);
|
|
|
|
if (TimePassesIsEnabled)
|
|
DebugTimer->stopTimer();
|
|
|
|
return LabelID;
|
|
}
|
|
|
|
/// RecordInlinedFnEnd - Indicate the end of inlined subroutine.
|
|
unsigned DwarfDebug::RecordInlinedFnEnd(DISubprogram &SP) {
|
|
if (!MAI->doesDwarfUsesInlineInfoSection())
|
|
return 0;
|
|
|
|
if (TimePassesIsEnabled)
|
|
DebugTimer->startTimer();
|
|
|
|
MDNode *Node = SP.getNode();
|
|
DenseMap<MDNode *, SmallVector<DbgScope *, 8> >::iterator
|
|
I = DbgConcreteScopeMap.find(Node);
|
|
|
|
if (I == DbgConcreteScopeMap.end()) {
|
|
// FIXME: Can this situation actually happen? And if so, should it?
|
|
if (TimePassesIsEnabled)
|
|
DebugTimer->stopTimer();
|
|
|
|
return 0;
|
|
}
|
|
|
|
SmallVector<DbgScope *, 8> &Scopes = I->second;
|
|
if (Scopes.empty()) {
|
|
// Returned ID is 0 if this is unbalanced "end of inlined
|
|
// scope". This could happen if optimizer eats dbg intrinsics
|
|
// or "beginning of inlined scope" is not recoginized due to
|
|
// missing location info. In such cases, ignore this region.end.
|
|
return 0;
|
|
}
|
|
|
|
DbgScope *Scope = Scopes.back(); Scopes.pop_back();
|
|
unsigned ID = MMI->NextLabelID();
|
|
MMI->RecordUsedDbgLabel(ID);
|
|
Scope->setEndLabelID(ID);
|
|
|
|
if (TimePassesIsEnabled)
|
|
DebugTimer->stopTimer();
|
|
|
|
return ID;
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// Emit Methods
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
/// SizeAndOffsetDie - Compute the size and offset of a DIE.
|
|
///
|
|
unsigned DwarfDebug::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 += MCAsmInfo::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(TD, AbbrevData[i].getForm());
|
|
|
|
// Size the DIE children if any.
|
|
if (!Children.empty()) {
|
|
assert(Abbrev->getChildrenFlag() == dwarf::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 DwarfDebug::SizeAndOffsets() {
|
|
// Compute size of compile unit header.
|
|
static 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(ModuleCU->getDie(), Offset, true);
|
|
CompileUnitOffsets[ModuleCU] = 0;
|
|
}
|
|
|
|
/// EmitInitial - Emit initial Dwarf declarations. This is necessary for cc
|
|
/// tools to recognize the object file contains Dwarf information.
|
|
void DwarfDebug::EmitInitial() {
|
|
// Check to see if we already emitted intial headers.
|
|
if (didInitial) return;
|
|
didInitial = true;
|
|
|
|
const TargetLoweringObjectFile &TLOF = Asm->getObjFileLowering();
|
|
|
|
// Dwarf sections base addresses.
|
|
if (MAI->doesDwarfRequireFrameSection()) {
|
|
Asm->OutStreamer.SwitchSection(TLOF.getDwarfFrameSection());
|
|
EmitLabel("section_debug_frame", 0);
|
|
}
|
|
|
|
Asm->OutStreamer.SwitchSection(TLOF.getDwarfInfoSection());
|
|
EmitLabel("section_info", 0);
|
|
Asm->OutStreamer.SwitchSection(TLOF.getDwarfAbbrevSection());
|
|
EmitLabel("section_abbrev", 0);
|
|
Asm->OutStreamer.SwitchSection(TLOF.getDwarfARangesSection());
|
|
EmitLabel("section_aranges", 0);
|
|
|
|
if (const MCSection *LineInfoDirective = TLOF.getDwarfMacroInfoSection()) {
|
|
Asm->OutStreamer.SwitchSection(LineInfoDirective);
|
|
EmitLabel("section_macinfo", 0);
|
|
}
|
|
|
|
Asm->OutStreamer.SwitchSection(TLOF.getDwarfLineSection());
|
|
EmitLabel("section_line", 0);
|
|
Asm->OutStreamer.SwitchSection(TLOF.getDwarfLocSection());
|
|
EmitLabel("section_loc", 0);
|
|
Asm->OutStreamer.SwitchSection(TLOF.getDwarfPubNamesSection());
|
|
EmitLabel("section_pubnames", 0);
|
|
Asm->OutStreamer.SwitchSection(TLOF.getDwarfStrSection());
|
|
EmitLabel("section_str", 0);
|
|
Asm->OutStreamer.SwitchSection(TLOF.getDwarfRangesSection());
|
|
EmitLabel("section_ranges", 0);
|
|
|
|
Asm->OutStreamer.SwitchSection(TLOF.getTextSection());
|
|
EmitLabel("text_begin", 0);
|
|
Asm->OutStreamer.SwitchSection(TLOF.getDataSection());
|
|
EmitLabel("data_begin", 0);
|
|
}
|
|
|
|
/// EmitDIE - Recusively Emits a debug information entry.
|
|
///
|
|
void DwarfDebug::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 (Asm->isVerbose())
|
|
Asm->EOL(std::string("Abbrev [" +
|
|
utostr(AbbrevNumber) +
|
|
"] 0x" + utohexstr(Die->getOffset()) +
|
|
":0x" + utohexstr(Die->getSize()) + " " +
|
|
dwarf::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 dwarf::DW_AT_sibling:
|
|
Asm->EmitInt32(Die->SiblingOffset());
|
|
break;
|
|
case dwarf::DW_AT_abstract_origin: {
|
|
DIEEntry *E = cast<DIEEntry>(Values[i]);
|
|
DIE *Origin = E->getEntry();
|
|
unsigned Addr =
|
|
CompileUnitOffsets[Die->getAbstractCompileUnit()] +
|
|
Origin->getOffset();
|
|
|
|
Asm->EmitInt32(Addr);
|
|
break;
|
|
}
|
|
default:
|
|
// Emit an attribute using the defined form.
|
|
Values[i]->EmitValue(this, Form);
|
|
break;
|
|
}
|
|
|
|
Asm->EOL(dwarf::AttributeString(Attr));
|
|
}
|
|
|
|
// Emit the DIE children if any.
|
|
if (Abbrev->getChildrenFlag() == dwarf::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");
|
|
}
|
|
}
|
|
|
|
/// EmitDebugInfo / EmitDebugInfoPerCU - Emit the debug info section.
|
|
///
|
|
void DwarfDebug::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::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 DwarfDebug::EmitDebugInfo() {
|
|
// Start debug info section.
|
|
Asm->OutStreamer.SwitchSection(
|
|
Asm->getObjFileLowering().getDwarfInfoSection());
|
|
|
|
EmitDebugInfoPerCU(ModuleCU);
|
|
}
|
|
|
|
/// EmitAbbreviations - Emit the abbreviation section.
|
|
///
|
|
void DwarfDebug::EmitAbbreviations() const {
|
|
// Check to see if it is worth the effort.
|
|
if (!Abbreviations.empty()) {
|
|
// Start the debug abbrev section.
|
|
Asm->OutStreamer.SwitchSection(
|
|
Asm->getObjFileLowering().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(Asm);
|
|
|
|
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 DwarfDebug::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(dwarf::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 DwarfDebug::EmitDebugLines() {
|
|
// If the target is using .loc/.file, the assembler will be emitting the
|
|
// .debug_line table automatically.
|
|
if (MAI->hasDotLocAndDotFile())
|
|
return;
|
|
|
|
// Minimum line delta, thus ranging from -10..(255-10).
|
|
const int MinLineDelta = -(dwarf::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->OutStreamer.SwitchSection(
|
|
Asm->getObjFileLowering().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::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 (Asm->isVerbose()) {
|
|
const MCSection *S = SectionMap[j + 1];
|
|
O << '\t' << MAI->getCommentString() << " Section"
|
|
<< S->getName() << '\n';
|
|
}*/
|
|
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 (LineInfo.getLine() == 0) continue;
|
|
|
|
if (!Asm->isVerbose())
|
|
Asm->EOL();
|
|
else {
|
|
std::pair<unsigned, unsigned> SourceID =
|
|
getSourceDirectoryAndFileIds(LineInfo.getSourceID());
|
|
O << '\t' << MAI->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(dwarf::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(dwarf::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(dwarf::DW_LNS_advance_line);
|
|
Asm->EOL("DW_LNS_advance_line");
|
|
Asm->EmitSLEB128Bytes(Offset); Asm->EOL("Line Offset");
|
|
Asm->EmitInt8(dwarf::DW_LNS_copy); Asm->EOL("DW_LNS_copy");
|
|
}
|
|
} else {
|
|
// Copy the previous row (different address or source)
|
|
Asm->EmitInt8(dwarf::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 DwarfDebug::EmitCommonDebugFrame() {
|
|
if (!MAI->doesDwarfRequireFrameSection())
|
|
return;
|
|
|
|
int stackGrowth =
|
|
Asm->TM.getFrameInfo()->getStackGrowthDirection() ==
|
|
TargetFrameInfo::StackGrowsUp ?
|
|
TD->getPointerSize() : -TD->getPointerSize();
|
|
|
|
// Start the dwarf frame section.
|
|
Asm->OutStreamer.SwitchSection(
|
|
Asm->getObjFileLowering().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)dwarf::DW_CIE_ID);
|
|
Asm->EOL("CIE Identifier Tag");
|
|
Asm->EmitInt8(dwarf::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
|
|
DwarfDebug::EmitFunctionDebugFrame(const FunctionDebugFrameInfo&DebugFrameInfo){
|
|
if (!MAI->doesDwarfRequireFrameSection())
|
|
return;
|
|
|
|
// Start the dwarf frame section.
|
|
Asm->OutStreamer.SwitchSection(
|
|
Asm->getObjFileLowering().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 DwarfDebug::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::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");
|
|
|
|
StringMap<DIE*> &Globals = Unit->getGlobals();
|
|
for (StringMap<DIE*>::const_iterator
|
|
GI = Globals.begin(), GE = Globals.end(); GI != GE; ++GI) {
|
|
const char *Name = GI->getKeyData();
|
|
DIE * Entity = GI->second;
|
|
|
|
Asm->EmitInt32(Entity->getOffset()); Asm->EOL("DIE offset");
|
|
Asm->EmitString(Name, strlen(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 DwarfDebug::EmitDebugPubNames() {
|
|
// Start the dwarf pubnames section.
|
|
Asm->OutStreamer.SwitchSection(
|
|
Asm->getObjFileLowering().getDwarfPubNamesSection());
|
|
|
|
EmitDebugPubNamesPerCU(ModuleCU);
|
|
}
|
|
|
|
/// EmitDebugStr - Emit visible names into a debug str section.
|
|
///
|
|
void DwarfDebug::EmitDebugStr() {
|
|
// Check to see if it is worth the effort.
|
|
if (!StringPool.empty()) {
|
|
// Start the dwarf str section.
|
|
Asm->OutStreamer.SwitchSection(
|
|
Asm->getObjFileLowering().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 DwarfDebug::EmitDebugLoc() {
|
|
// Start the dwarf loc section.
|
|
Asm->OutStreamer.SwitchSection(
|
|
Asm->getObjFileLowering().getDwarfLocSection());
|
|
Asm->EOL();
|
|
}
|
|
|
|
/// EmitDebugARanges - Emit visible names into a debug aranges section.
|
|
///
|
|
void DwarfDebug::EmitDebugARanges() {
|
|
// Start the dwarf aranges section.
|
|
Asm->OutStreamer.SwitchSection(
|
|
Asm->getObjFileLowering().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::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 DwarfDebug::EmitDebugRanges() {
|
|
// Start the dwarf ranges section.
|
|
Asm->OutStreamer.SwitchSection(
|
|
Asm->getObjFileLowering().getDwarfRangesSection());
|
|
Asm->EOL();
|
|
}
|
|
|
|
/// EmitDebugMacInfo - Emit visible names into a debug macinfo section.
|
|
///
|
|
void DwarfDebug::EmitDebugMacInfo() {
|
|
if (const MCSection *LineInfo =
|
|
Asm->getObjFileLowering().getDwarfMacroInfoSection()) {
|
|
// Start the dwarf macinfo section.
|
|
Asm->OutStreamer.SwitchSection(LineInfo);
|
|
Asm->EOL();
|
|
}
|
|
}
|
|
|
|
/// EmitDebugInlineInfo - Emit inline info using following format.
|
|
/// Section Header:
|
|
/// 1. length of section
|
|
/// 2. Dwarf version number
|
|
/// 3. address size.
|
|
///
|
|
/// Entries (one "entry" for each function that was inlined):
|
|
///
|
|
/// 1. offset into __debug_str section for MIPS linkage name, if exists;
|
|
/// otherwise offset into __debug_str for regular function name.
|
|
/// 2. offset into __debug_str section for regular function name.
|
|
/// 3. an unsigned LEB128 number indicating the number of distinct inlining
|
|
/// instances for the function.
|
|
///
|
|
/// The rest of the entry consists of a {die_offset, low_pc} pair for each
|
|
/// inlined instance; the die_offset points to the inlined_subroutine die in the
|
|
/// __debug_info section, and the low_pc is the starting address for the
|
|
/// inlining instance.
|
|
void DwarfDebug::EmitDebugInlineInfo() {
|
|
if (!MAI->doesDwarfUsesInlineInfoSection())
|
|
return;
|
|
|
|
if (!ModuleCU)
|
|
return;
|
|
|
|
Asm->OutStreamer.SwitchSection(
|
|
Asm->getObjFileLowering().getDwarfDebugInlineSection());
|
|
Asm->EOL();
|
|
EmitDifference("debug_inlined_end", 1,
|
|
"debug_inlined_begin", 1, true);
|
|
Asm->EOL("Length of Debug Inlined Information Entry");
|
|
|
|
EmitLabel("debug_inlined_begin", 1);
|
|
|
|
Asm->EmitInt16(dwarf::DWARF_VERSION); Asm->EOL("Dwarf Version");
|
|
Asm->EmitInt8(TD->getPointerSize()); Asm->EOL("Address Size (in bytes)");
|
|
|
|
for (DenseMap<MDNode *, SmallVector<unsigned, 4> >::iterator
|
|
I = InlineInfo.begin(), E = InlineInfo.end(); I != E; ++I) {
|
|
MDNode *Node = I->first;
|
|
SmallVector<unsigned, 4> &Labels = I->second;
|
|
DISubprogram SP(Node);
|
|
const char *LName = SP.getLinkageName();
|
|
const char *Name = SP.getName();
|
|
|
|
if (!LName)
|
|
Asm->EmitString(Name);
|
|
else {
|
|
// Skip special LLVM prefix that is used to inform the asm printer to not
|
|
// emit usual symbol prefix before the symbol name. This happens for
|
|
// Objective-C symbol names and symbol whose name is replaced using GCC's
|
|
// __asm__ attribute.
|
|
if (LName[0] == 1)
|
|
LName = &LName[1];
|
|
Asm->EmitString(LName);
|
|
}
|
|
Asm->EOL("MIPS linkage name");
|
|
|
|
Asm->EmitString(Name); Asm->EOL("Function name");
|
|
|
|
Asm->EmitULEB128Bytes(Labels.size()); Asm->EOL("Inline count");
|
|
|
|
for (SmallVector<unsigned, 4>::iterator LI = Labels.begin(),
|
|
LE = Labels.end(); LI != LE; ++LI) {
|
|
DIE *SP = ModuleCU->getDieMapSlotFor(Node);
|
|
Asm->EmitInt32(SP->getOffset()); Asm->EOL("DIE offset");
|
|
|
|
if (TD->getPointerSize() == sizeof(int32_t))
|
|
O << MAI->getData32bitsDirective();
|
|
else
|
|
O << MAI->getData64bitsDirective();
|
|
|
|
PrintLabelName("label", *LI); Asm->EOL("low_pc");
|
|
}
|
|
}
|
|
|
|
EmitLabel("debug_inlined_end", 1);
|
|
Asm->EOL();
|
|
}
|