mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-11-17 18:10:31 +00:00
f7399bf929
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@97906 91177308-0d34-0410-b5e6-96231b3b80d8
3030 lines
102 KiB
C++
3030 lines
102 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/Mangler.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/STLExtras.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/ValueHandle.h"
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#include "llvm/Support/FormattedStream.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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//===----------------------------------------------------------------------===//
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/// Configuration values for initial hash set sizes (log2).
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///
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static const unsigned InitAbbreviationsSetSize = 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 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 *CUDie;
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/// IndexTyDie - An anonymous type for index type.
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DIE *IndexTyDie;
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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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DenseMap<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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DenseMap<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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/// GlobalTypes - A map of globally visible types for this unit.
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///
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StringMap<DIE*> GlobalTypes;
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public:
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CompileUnit(unsigned I, DIE *D)
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: ID(I), CUDie(D), IndexTyDie(0) {}
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~CompileUnit() { delete CUDie; delete IndexTyDie; }
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// Accessors.
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unsigned getID() const { return ID; }
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DIE* getCUDie() const { return CUDie; }
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const StringMap<DIE*> &getGlobals() const { return Globals; }
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const StringMap<DIE*> &getGlobalTypes() const { return GlobalTypes; }
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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 !CUDie->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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/// addGlobalType - Add a new global type to the compile unit.
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///
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void addGlobalType(const std::string &Name, DIE *Die) {
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GlobalTypes[Name] = Die;
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}
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/// getDIE - Returns the debug information entry map slot for the
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/// specified debug variable.
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DIE *getDIE(MDNode *N) { return GVToDieMap.lookup(N); }
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/// insertDIE - Insert DIE into the map.
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void insertDIE(MDNode *N, DIE *D) {
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GVToDieMap.insert(std::make_pair(N, D));
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}
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/// getDIEEntry - Returns the debug information entry for the speciefied
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/// debug variable.
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DIEEntry *getDIEEntry(MDNode *N) {
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DenseMap<MDNode *, DIEEntry *>::iterator I = GVToDIEEntryMap.find(N);
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if (I == GVToDIEEntryMap.end())
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return NULL;
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return I->second;
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}
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/// insertDIEEntry - Insert debug information entry into the map.
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void insertDIEEntry(MDNode *N, DIEEntry *E) {
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GVToDIEEntryMap.insert(std::make_pair(N, E));
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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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void addDie(DIE *Buffer) {
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this->CUDie->addChild(Buffer);
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}
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// getIndexTyDie - Get an anonymous type for index type.
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DIE *getIndexTyDie() {
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return IndexTyDie;
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}
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// setIndexTyDie - Set D as anonymous type for index which can be reused
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// later.
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void setIndexTyDie(DIE *D) {
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IndexTyDie = D;
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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 DbgVariable {
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DIVariable Var; // Variable Descriptor.
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unsigned FrameIndex; // Variable frame index.
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DbgVariable *AbstractVar; // Abstract variable for this variable.
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DIE *TheDIE;
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public:
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DbgVariable(DIVariable V, unsigned I)
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: Var(V), FrameIndex(I), AbstractVar(0), TheDIE(0) {}
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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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void setAbstractVariable(DbgVariable *V) { AbstractVar = V; }
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DbgVariable *getAbstractVariable() const { return AbstractVar; }
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void setDIE(DIE *D) { TheDIE = D; }
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DIE *getDIE() const { return TheDIE; }
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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 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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// Location at which this scope is inlined.
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AssertingVH<MDNode> InlinedAtLocation;
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bool AbstractScope; // Abstract Scope
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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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// Scopes defined in scope. Contents not owned.
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SmallVector<DbgScope *, 4> Scopes;
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// Variables declared in scope. Contents owned.
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SmallVector<DbgVariable *, 8> Variables;
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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, MDNode *I = 0)
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: Parent(P), Desc(D), InlinedAtLocation(I), AbstractScope(false),
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StartLabelID(0), EndLabelID(0),
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LastInsn(0), 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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void setParent(DbgScope *P) { Parent = P; }
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DIDescriptor getDesc() const { return Desc; }
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MDNode *getInlinedAt() const {
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return InlinedAtLocation;
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}
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MDNode *getScopeNode() const { return Desc.getNode(); }
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unsigned getStartLabelID() const { return StartLabelID; }
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unsigned getEndLabelID() const { return EndLabelID; }
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const SmallVector<DbgScope *, 4> &getScopes() { return Scopes; }
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const SmallVector<DbgVariable *, 8> &getVariables() { return Variables; }
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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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void setAbstractScope() { AbstractScope = true; }
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bool isAbstractScope() const { return AbstractScope; }
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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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void fixInstructionMarkers(DenseMap<const MachineInstr *,
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unsigned> &MIIndexMap) {
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assert (getFirstInsn() && "First instruction is missing!");
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// Use the end of last child scope as end of this scope.
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const SmallVector<DbgScope *, 4> &Scopes = getScopes();
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const MachineInstr *LastInsn = getFirstInsn();
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unsigned LIndex = 0;
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if (Scopes.empty()) {
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assert (getLastInsn() && "Inner most scope does not have last insn!");
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return;
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}
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for (SmallVector<DbgScope *, 4>::const_iterator SI = Scopes.begin(),
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SE = Scopes.end(); SI != SE; ++SI) {
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DbgScope *DS = *SI;
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DS->fixInstructionMarkers(MIIndexMap);
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const MachineInstr *DSLastInsn = DS->getLastInsn();
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unsigned DSI = MIIndexMap[DSLastInsn];
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if (DSI > LIndex) {
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LastInsn = DSLastInsn;
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LIndex = DSI;
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}
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}
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unsigned CurrentLastInsnIndex = 0;
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if (const MachineInstr *CL = getLastInsn())
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CurrentLastInsnIndex = MIIndexMap[CL];
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unsigned FIndex = MIIndexMap[getFirstInsn()];
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// Set LastInsn as the last instruction for this scope only if
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// it follows
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// 1) this scope's first instruction and
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// 2) current last instruction for this scope, if any.
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if (LIndex >= CurrentLastInsnIndex && LIndex >= FIndex)
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setLastInsn(LastInsn);
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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 = dbgs();
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err.indent(IndentLevel);
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MDNode *N = Desc.getNode();
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N->dump();
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err << " [" << StartLabelID << ", " << EndLabelID << "]\n";
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if (AbstractScope)
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err << "Abstract Scope\n";
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IndentLevel += 2;
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if (!Scopes.empty())
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err << "Children ...\n";
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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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DbgScope::~DbgScope() {
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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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}
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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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: DwarfPrinter(OS, A, T, "dbg"), ModuleCU(0),
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AbbreviationsSet(InitAbbreviationsSetSize), Abbreviations(),
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DIEValues(), StringPool(),
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SectionSourceLines(), didInitial(false), shouldEmit(false),
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CurrentFnDbgScope(0), DebugTimer(0) {
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if (TimePassesIsEnabled)
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DebugTimer = new Timer("Dwarf Debug Writer");
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}
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DwarfDebug::~DwarfDebug() {
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for (unsigned j = 0, M = DIEValues.size(); j < M; ++j)
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delete DIEValues[j];
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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 = new DIEEntry(Entry);
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DIEValues.push_back(Value);
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return 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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DIEValue *Value = new DIEInteger(Integer);
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DIEValues.push_back(Value);
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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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DIEValue *Value = new DIEInteger(Integer);
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DIEValues.push_back(Value);
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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. DIEString only
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/// keeps string reference.
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void DwarfDebug::addString(DIE *Die, unsigned Attribute, unsigned Form,
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StringRef String) {
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DIEValue *Value = new DIEString(String);
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DIEValues.push_back(Value);
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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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DIEValue *Value = new DIEDwarfLabel(Label);
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DIEValues.push_back(Value);
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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 MCSymbol *Sym) {
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DIEValue *Value = new DIEObjectLabel(Sym);
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DIEValues.push_back(Value);
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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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DIEValue *Value = new DIESectionOffset(Label, Section, isEH, useSet);
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DIEValues.push_back(Value);
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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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DIEValue *Value = new DIEDelta(Hi, Lo);
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DIEValues.push_back(Value);
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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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DIEValues.push_back(Block);
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Die->addValue(Attribute, Block->BestForm(), Block);
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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);
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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 DISubprogram *SP) {
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// If there is no compile unit specified, don't add a line #.
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if (SP->getCompileUnit().isNull())
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return;
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// If the line number is 0, don't add it.
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if (SP->getLineNumber() == 0)
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return;
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unsigned Line = SP->getLineNumber();
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unsigned FileID = findCompileUnit(SP->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 DIType *Ty) {
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// If there is no compile unit specified, don't add a line #.
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DICompileUnit CU = Ty->getCompileUnit();
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if (CU.isNull())
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return;
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unsigned Line = Ty->getLineNumber();
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unsigned FileID = findCompileUnit(CU)->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 DINameSpace *NS) {
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// If there is no compile unit specified, don't add a line #.
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if (NS->getCompileUnit().isNull())
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return;
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unsigned Line = NS->getLineNumber();
|
|
StringRef FN = NS->getFilename();
|
|
StringRef Dir = NS->getDirectory();
|
|
|
|
unsigned FileID = GetOrCreateSourceID(Dir, FN);
|
|
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 (Name == DT.getName())
|
|
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 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;
|
|
|
|
StringRef 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());
|
|
StringRef fieldName = DT.getName();
|
|
if (fieldName == "__forwarding")
|
|
forwardingField = Element;
|
|
else if (fieldName == varName)
|
|
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);
|
|
}
|
|
|
|
/// addToContextOwner - Add Die into the list of its context owner's children.
|
|
void DwarfDebug::addToContextOwner(DIE *Die, DIDescriptor Context) {
|
|
if (Context.isNull())
|
|
ModuleCU->addDie(Die);
|
|
else if (Context.isType()) {
|
|
DIE *ContextDIE = getOrCreateTypeDIE(DIType(Context.getNode()));
|
|
ContextDIE->addChild(Die);
|
|
} else if (Context.isNameSpace()) {
|
|
DIE *ContextDIE = getOrCreateNameSpace(DINameSpace(Context.getNode()));
|
|
ContextDIE->addChild(Die);
|
|
} else if (DIE *ContextDIE = ModuleCU->getDIE(Context.getNode()))
|
|
ContextDIE->addChild(Die);
|
|
else
|
|
ModuleCU->addDie(Die);
|
|
}
|
|
|
|
/// getOrCreateTypeDIE - Find existing DIE or create new DIE for the
|
|
/// given DIType.
|
|
DIE *DwarfDebug::getOrCreateTypeDIE(DIType Ty) {
|
|
DIE *TyDIE = ModuleCU->getDIE(Ty.getNode());
|
|
if (TyDIE)
|
|
return TyDIE;
|
|
|
|
// Create new type.
|
|
TyDIE = new DIE(dwarf::DW_TAG_base_type);
|
|
ModuleCU->insertDIE(Ty.getNode(), TyDIE);
|
|
if (Ty.isBasicType())
|
|
constructTypeDIE(*TyDIE, DIBasicType(Ty.getNode()));
|
|
else if (Ty.isCompositeType())
|
|
constructTypeDIE(*TyDIE, DICompositeType(Ty.getNode()));
|
|
else {
|
|
assert(Ty.isDerivedType() && "Unknown kind of DIType");
|
|
constructTypeDIE(*TyDIE, DIDerivedType(Ty.getNode()));
|
|
}
|
|
|
|
addToContextOwner(TyDIE, Ty.getContext());
|
|
return TyDIE;
|
|
}
|
|
|
|
/// addType - Add a new type attribute to the specified entity.
|
|
void DwarfDebug::addType(DIE *Entity, DIType Ty) {
|
|
if (Ty.isNull())
|
|
return;
|
|
|
|
// Check for pre-existence.
|
|
DIEEntry *Entry = ModuleCU->getDIEEntry(Ty.getNode());
|
|
// If it exists then use the existing value.
|
|
if (Entry) {
|
|
Entity->addValue(dwarf::DW_AT_type, dwarf::DW_FORM_ref4, Entry);
|
|
return;
|
|
}
|
|
|
|
// Set up proxy.
|
|
Entry = createDIEEntry();
|
|
ModuleCU->insertDIEEntry(Ty.getNode(), Entry);
|
|
|
|
// Construct type.
|
|
DIE *Buffer = getOrCreateTypeDIE(Ty);
|
|
|
|
Entry->setEntry(Buffer);
|
|
Entity->addValue(dwarf::DW_AT_type, dwarf::DW_FORM_ref4, Entry);
|
|
}
|
|
|
|
/// constructTypeDIE - Construct basic type die from DIBasicType.
|
|
void DwarfDebug::constructTypeDIE(DIE &Buffer, DIBasicType BTy) {
|
|
// Get core information.
|
|
StringRef 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.empty())
|
|
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(DIE &Buffer, DIDerivedType DTy) {
|
|
// Get core information.
|
|
StringRef 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(&Buffer, FromTy);
|
|
|
|
// Add name if not anonymous or intermediate type.
|
|
if (!Name.empty())
|
|
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(DIE &Buffer, DICompositeType CTy) {
|
|
// Get core information.
|
|
StringRef 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(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(&Enum);
|
|
Buffer.addChild(ElemDie);
|
|
}
|
|
}
|
|
}
|
|
break;
|
|
case dwarf::DW_TAG_subroutine_type: {
|
|
// Add return type.
|
|
DIArray Elements = CTy.getTypeArray();
|
|
DIDescriptor RTy = Elements.getElement(0);
|
|
addType(&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(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(DISubprogram(Element.getNode()));
|
|
else if (Element.getTag() == dwarf::DW_TAG_auto_variable) {
|
|
DIVariable DV(Element.getNode());
|
|
ElemDie = new DIE(dwarf::DW_TAG_variable);
|
|
addString(ElemDie, dwarf::DW_AT_name, dwarf::DW_FORM_string,
|
|
DV.getName());
|
|
addType(ElemDie, DV.getType());
|
|
addUInt(ElemDie, dwarf::DW_AT_declaration, dwarf::DW_FORM_flag, 1);
|
|
addUInt(ElemDie, dwarf::DW_AT_external, dwarf::DW_FORM_flag, 1);
|
|
addSourceLine(ElemDie, &DV);
|
|
} else
|
|
ElemDie = createMemberDIE(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);
|
|
|
|
DICompositeType ContainingType = CTy.getContainingType();
|
|
if (!ContainingType.isNull())
|
|
addDIEEntry(&Buffer, dwarf::DW_AT_containing_type, dwarf::DW_FORM_ref4,
|
|
getOrCreateTypeDIE(DIType(ContainingType.getNode())));
|
|
break;
|
|
}
|
|
default:
|
|
break;
|
|
}
|
|
|
|
// Add name if not anonymous or intermediate type.
|
|
if (!Name.empty())
|
|
addString(&Buffer, dwarf::DW_AT_name, dwarf::DW_FORM_string, Name);
|
|
|
|
if (Tag == dwarf::DW_TAG_enumeration_type || Tag == dwarf::DW_TAG_class_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);
|
|
addSInt(DW_Subrange, dwarf::DW_AT_upper_bound, 0, H);
|
|
|
|
Buffer.addChild(DW_Subrange);
|
|
}
|
|
|
|
/// constructArrayTypeDIE - Construct array type DIE from DICompositeType.
|
|
void DwarfDebug::constructArrayTypeDIE(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(&Buffer, CTy->getTypeDerivedFrom());
|
|
DIArray Elements = CTy->getTypeArray();
|
|
|
|
// Get an anonymous type for index type.
|
|
DIE *IdxTy = ModuleCU->getIndexTyDie();
|
|
if (!IdxTy) {
|
|
// Construct an anonymous type for index type.
|
|
IdxTy = new DIE(dwarf::DW_TAG_base_type);
|
|
addUInt(IdxTy, dwarf::DW_AT_byte_size, 0, sizeof(int32_t));
|
|
addUInt(IdxTy, dwarf::DW_AT_encoding, dwarf::DW_FORM_data1,
|
|
dwarf::DW_ATE_signed);
|
|
ModuleCU->addDie(IdxTy);
|
|
ModuleCU->setIndexTyDie(IdxTy);
|
|
}
|
|
|
|
// 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()), IdxTy);
|
|
}
|
|
}
|
|
|
|
/// constructEnumTypeDIE - Construct enum type DIE from DIEnumerator.
|
|
DIE *DwarfDebug::constructEnumTypeDIE(DIEnumerator *ETy) {
|
|
DIE *Enumerator = new DIE(dwarf::DW_TAG_enumerator);
|
|
StringRef 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;
|
|
}
|
|
|
|
/// getRealLinkageName - If special LLVM prefix that is used to inform the asm
|
|
/// printer to not emit usual symbol prefix before the symbol name is used then
|
|
/// return linkage name after skipping this special LLVM prefix.
|
|
static StringRef getRealLinkageName(StringRef LinkageName) {
|
|
char One = '\1';
|
|
if (LinkageName.startswith(StringRef(&One, 1)))
|
|
return LinkageName.substr(1);
|
|
return LinkageName;
|
|
}
|
|
|
|
/// createGlobalVariableDIE - Create new DIE using GV.
|
|
DIE *DwarfDebug::createGlobalVariableDIE(const DIGlobalVariable &GV) {
|
|
// If the global variable was optmized out then no need to create debug info
|
|
// entry.
|
|
if (!GV.getGlobal()) return NULL;
|
|
if (GV.getDisplayName().empty()) return NULL;
|
|
|
|
DIE *GVDie = new DIE(dwarf::DW_TAG_variable);
|
|
addString(GVDie, dwarf::DW_AT_name, dwarf::DW_FORM_string,
|
|
GV.getDisplayName());
|
|
|
|
StringRef LinkageName = GV.getLinkageName();
|
|
if (!LinkageName.empty())
|
|
addString(GVDie, dwarf::DW_AT_MIPS_linkage_name, dwarf::DW_FORM_string,
|
|
getRealLinkageName(LinkageName));
|
|
|
|
addType(GVDie, GV.getType());
|
|
if (!GV.isLocalToUnit())
|
|
addUInt(GVDie, dwarf::DW_AT_external, dwarf::DW_FORM_flag, 1);
|
|
addSourceLine(GVDie, &GV);
|
|
|
|
return GVDie;
|
|
}
|
|
|
|
/// createMemberDIE - Create new member DIE.
|
|
DIE *DwarfDebug::createMemberDIE(const DIDerivedType &DT) {
|
|
DIE *MemberDie = new DIE(DT.getTag());
|
|
StringRef Name = DT.getName();
|
|
if (!Name.empty())
|
|
addString(MemberDie, dwarf::DW_AT_name, dwarf::DW_FORM_string, Name);
|
|
|
|
addType(MemberDie, DT.getTypeDerivedFrom());
|
|
|
|
addSourceLine(MemberDie, &DT);
|
|
|
|
DIEBlock *MemLocationDie = new DIEBlock();
|
|
addUInt(MemLocationDie, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_plus_uconst);
|
|
|
|
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 AlignMask = ~(DT.getAlignInBits() - 1);
|
|
uint64_t HiMark = (Offset + FieldSize) & AlignMask;
|
|
uint64_t 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);
|
|
|
|
// Here WD_AT_data_member_location points to the anonymous
|
|
// field that includes this bit field.
|
|
addUInt(MemLocationDie, 0, dwarf::DW_FORM_udata, FieldOffset >> 3);
|
|
|
|
} else
|
|
// This is not a bitfield.
|
|
addUInt(MemLocationDie, 0, dwarf::DW_FORM_udata, DT.getOffsetInBits() >> 3);
|
|
|
|
if (DT.getTag() == dwarf::DW_TAG_inheritance
|
|
&& DT.isVirtual()) {
|
|
|
|
// For C++, virtual base classes are not at fixed offset. Use following
|
|
// expression to extract appropriate offset from vtable.
|
|
// BaseAddr = ObAddr + *((*ObAddr) - Offset)
|
|
|
|
DIEBlock *VBaseLocationDie = new DIEBlock();
|
|
addUInt(VBaseLocationDie, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_dup);
|
|
addUInt(VBaseLocationDie, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_deref);
|
|
addUInt(VBaseLocationDie, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_constu);
|
|
addUInt(VBaseLocationDie, 0, dwarf::DW_FORM_udata, DT.getOffsetInBits());
|
|
addUInt(VBaseLocationDie, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_minus);
|
|
addUInt(VBaseLocationDie, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_deref);
|
|
addUInt(VBaseLocationDie, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_plus);
|
|
|
|
addBlock(MemberDie, dwarf::DW_AT_data_member_location, 0,
|
|
VBaseLocationDie);
|
|
} else
|
|
addBlock(MemberDie, dwarf::DW_AT_data_member_location, 0, MemLocationDie);
|
|
|
|
if (DT.isProtected())
|
|
addUInt(MemberDie, dwarf::DW_AT_accessibility, dwarf::DW_FORM_flag,
|
|
dwarf::DW_ACCESS_protected);
|
|
else if (DT.isPrivate())
|
|
addUInt(MemberDie, dwarf::DW_AT_accessibility, dwarf::DW_FORM_flag,
|
|
dwarf::DW_ACCESS_private);
|
|
else if (DT.getTag() == dwarf::DW_TAG_inheritance)
|
|
addUInt(MemberDie, dwarf::DW_AT_accessibility, dwarf::DW_FORM_flag,
|
|
dwarf::DW_ACCESS_public);
|
|
if (DT.isVirtual())
|
|
addUInt(MemberDie, dwarf::DW_AT_virtuality, dwarf::DW_FORM_flag,
|
|
dwarf::DW_VIRTUALITY_virtual);
|
|
return MemberDie;
|
|
}
|
|
|
|
/// createSubprogramDIE - Create new DIE using SP.
|
|
DIE *DwarfDebug::createSubprogramDIE(const DISubprogram &SP, bool MakeDecl) {
|
|
DIE *SPDie = ModuleCU->getDIE(SP.getNode());
|
|
if (SPDie)
|
|
return SPDie;
|
|
|
|
SPDie = new DIE(dwarf::DW_TAG_subprogram);
|
|
// Constructors and operators for anonymous aggregates do not have names.
|
|
if (!SP.getName().empty())
|
|
addString(SPDie, dwarf::DW_AT_name, dwarf::DW_FORM_string, SP.getName());
|
|
|
|
StringRef LinkageName = SP.getLinkageName();
|
|
if (!LinkageName.empty())
|
|
addString(SPDie, dwarf::DW_AT_MIPS_linkage_name, dwarf::DW_FORM_string,
|
|
getRealLinkageName(LinkageName));
|
|
|
|
addSourceLine(SPDie, &SP);
|
|
|
|
// 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.
|
|
DICompositeType SPTy = SP.getType();
|
|
DIArray Args = SPTy.getTypeArray();
|
|
unsigned SPTag = SPTy.getTag();
|
|
|
|
if (Args.isNull() || SPTag != dwarf::DW_TAG_subroutine_type)
|
|
addType(SPDie, SPTy);
|
|
else
|
|
addType(SPDie, DIType(Args.getElement(0).getNode()));
|
|
|
|
unsigned VK = SP.getVirtuality();
|
|
if (VK) {
|
|
addUInt(SPDie, dwarf::DW_AT_virtuality, dwarf::DW_FORM_flag, VK);
|
|
DIEBlock *Block = new DIEBlock();
|
|
addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_constu);
|
|
addUInt(Block, 0, dwarf::DW_FORM_data1, SP.getVirtualIndex());
|
|
addBlock(SPDie, dwarf::DW_AT_vtable_elem_location, 0, Block);
|
|
ContainingTypeMap.insert(std::make_pair(SPDie,
|
|
SP.getContainingType().getNode()));
|
|
}
|
|
|
|
if (MakeDecl || !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 while processing variables.
|
|
DICompositeType SPTy = SP.getType();
|
|
DIArray Args = SPTy.getTypeArray();
|
|
unsigned SPTag = SPTy.getTag();
|
|
|
|
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);
|
|
DIType ATy = DIType(DIType(Args.getElement(i).getNode()));
|
|
addType(Arg, ATy);
|
|
if (ATy.isArtificial())
|
|
addUInt(Arg, dwarf::DW_AT_artificial, dwarf::DW_FORM_flag, 1);
|
|
SPDie->addChild(Arg);
|
|
}
|
|
}
|
|
|
|
if (SP.isArtificial())
|
|
addUInt(SPDie, dwarf::DW_AT_artificial, dwarf::DW_FORM_flag, 1);
|
|
|
|
// DW_TAG_inlined_subroutine may refer to this DIE.
|
|
ModuleCU->insertDIE(SP.getNode(), SPDie);
|
|
return SPDie;
|
|
}
|
|
|
|
/// findCompileUnit - Get the compile unit for the given descriptor.
|
|
///
|
|
CompileUnit *DwarfDebug::findCompileUnit(DICompileUnit Unit) {
|
|
DenseMap<Value *, CompileUnit *>::const_iterator I =
|
|
CompileUnitMap.find(Unit.getNode());
|
|
if (I == CompileUnitMap.end())
|
|
return constructCompileUnit(Unit.getNode());
|
|
return I->second;
|
|
}
|
|
|
|
/// getUpdatedDbgScope - Find or create DbgScope assicated with the instruction.
|
|
/// Initialize scope and update scope hierarchy.
|
|
DbgScope *DwarfDebug::getUpdatedDbgScope(MDNode *N, const MachineInstr *MI,
|
|
MDNode *InlinedAt) {
|
|
assert (N && "Invalid Scope encoding!");
|
|
assert (MI && "Missing machine instruction!");
|
|
bool GetConcreteScope = (MI && InlinedAt);
|
|
|
|
DbgScope *NScope = NULL;
|
|
|
|
if (InlinedAt)
|
|
NScope = DbgScopeMap.lookup(InlinedAt);
|
|
else
|
|
NScope = DbgScopeMap.lookup(N);
|
|
assert (NScope && "Unable to find working scope!");
|
|
|
|
if (NScope->getFirstInsn())
|
|
return NScope;
|
|
|
|
DbgScope *Parent = NULL;
|
|
if (GetConcreteScope) {
|
|
DILocation IL(InlinedAt);
|
|
Parent = getUpdatedDbgScope(IL.getScope().getNode(), MI,
|
|
IL.getOrigLocation().getNode());
|
|
assert (Parent && "Unable to find Parent scope!");
|
|
NScope->setParent(Parent);
|
|
Parent->addScope(NScope);
|
|
} else if (DIDescriptor(N).isLexicalBlock()) {
|
|
DILexicalBlock DB(N);
|
|
if (!DB.getContext().isNull()) {
|
|
Parent = getUpdatedDbgScope(DB.getContext().getNode(), MI, InlinedAt);
|
|
NScope->setParent(Parent);
|
|
Parent->addScope(NScope);
|
|
}
|
|
}
|
|
|
|
NScope->setFirstInsn(MI);
|
|
|
|
if (!Parent && !InlinedAt) {
|
|
StringRef SPName = DISubprogram(N).getLinkageName();
|
|
if (SPName == MF->getFunction()->getName())
|
|
CurrentFnDbgScope = NScope;
|
|
}
|
|
|
|
if (GetConcreteScope) {
|
|
ConcreteScopes[InlinedAt] = NScope;
|
|
getOrCreateAbstractScope(N);
|
|
}
|
|
|
|
return NScope;
|
|
}
|
|
|
|
DbgScope *DwarfDebug::getOrCreateAbstractScope(MDNode *N) {
|
|
assert (N && "Invalid Scope encoding!");
|
|
|
|
DbgScope *AScope = AbstractScopes.lookup(N);
|
|
if (AScope)
|
|
return AScope;
|
|
|
|
DbgScope *Parent = NULL;
|
|
|
|
DIDescriptor Scope(N);
|
|
if (Scope.isLexicalBlock()) {
|
|
DILexicalBlock DB(N);
|
|
DIDescriptor ParentDesc = DB.getContext();
|
|
if (!ParentDesc.isNull())
|
|
Parent = getOrCreateAbstractScope(ParentDesc.getNode());
|
|
}
|
|
|
|
AScope = new DbgScope(Parent, DIDescriptor(N), NULL);
|
|
|
|
if (Parent)
|
|
Parent->addScope(AScope);
|
|
AScope->setAbstractScope();
|
|
AbstractScopes[N] = AScope;
|
|
if (DIDescriptor(N).isSubprogram())
|
|
AbstractScopesList.push_back(AScope);
|
|
return AScope;
|
|
}
|
|
|
|
/// updateSubprogramScopeDIE - Find DIE for the given subprogram and
|
|
/// attach appropriate DW_AT_low_pc and DW_AT_high_pc attributes.
|
|
/// If there are global variables in this scope then create and insert
|
|
/// DIEs for these variables.
|
|
DIE *DwarfDebug::updateSubprogramScopeDIE(MDNode *SPNode) {
|
|
|
|
DIE *SPDie = ModuleCU->getDIE(SPNode);
|
|
assert (SPDie && "Unable to find subprogram DIE!");
|
|
DISubprogram SP(SPNode);
|
|
// There is not any need to generate specification DIE for a function
|
|
// defined at compile unit level. If a function is defined inside another
|
|
// function then gdb prefers the definition at top level and but does not
|
|
// expect specification DIE in parent function. So avoid creating
|
|
// specification DIE for a function defined inside a function.
|
|
if (SP.isDefinition() && !SP.getContext().isCompileUnit()
|
|
&& !SP.getContext().isSubprogram()) {
|
|
addUInt(SPDie, dwarf::DW_AT_declaration, dwarf::DW_FORM_flag, 1);
|
|
// Add arguments.
|
|
DICompositeType SPTy = SP.getType();
|
|
DIArray Args = SPTy.getTypeArray();
|
|
unsigned SPTag = SPTy.getTag();
|
|
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);
|
|
DIType ATy = DIType(DIType(Args.getElement(i).getNode()));
|
|
addType(Arg, ATy);
|
|
if (ATy.isArtificial())
|
|
addUInt(Arg, dwarf::DW_AT_artificial, dwarf::DW_FORM_flag, 1);
|
|
SPDie->addChild(Arg);
|
|
}
|
|
DIE *SPDeclDie = SPDie;
|
|
SPDie = new DIE(dwarf::DW_TAG_subprogram);
|
|
addDIEEntry(SPDie, dwarf::DW_AT_specification, dwarf::DW_FORM_ref4,
|
|
SPDeclDie);
|
|
ModuleCU->addDie(SPDie);
|
|
}
|
|
|
|
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);
|
|
|
|
if (!DISubprogram(SPNode).isLocalToUnit())
|
|
addUInt(SPDie, dwarf::DW_AT_external, dwarf::DW_FORM_flag, 1);
|
|
|
|
return SPDie;
|
|
}
|
|
|
|
/// constructLexicalScope - Construct new DW_TAG_lexical_block
|
|
/// for this scope and attach DW_AT_low_pc/DW_AT_high_pc labels.
|
|
DIE *DwarfDebug::constructLexicalScopeDIE(DbgScope *Scope) {
|
|
unsigned StartID = MMI->MappedLabel(Scope->getStartLabelID());
|
|
unsigned EndID = MMI->MappedLabel(Scope->getEndLabelID());
|
|
|
|
// Ignore empty scopes.
|
|
if (StartID == EndID && StartID != 0)
|
|
return NULL;
|
|
|
|
DIE *ScopeDIE = new DIE(dwarf::DW_TAG_lexical_block);
|
|
if (Scope->isAbstractScope())
|
|
return ScopeDIE;
|
|
|
|
addLabel(ScopeDIE, dwarf::DW_AT_low_pc, dwarf::DW_FORM_addr,
|
|
StartID ?
|
|
DWLabel("label", StartID)
|
|
: DWLabel("func_begin", SubprogramCount));
|
|
addLabel(ScopeDIE, dwarf::DW_AT_high_pc, dwarf::DW_FORM_addr,
|
|
EndID ?
|
|
DWLabel("label", EndID)
|
|
: DWLabel("func_end", SubprogramCount));
|
|
|
|
|
|
|
|
return ScopeDIE;
|
|
}
|
|
|
|
/// constructInlinedScopeDIE - This scope represents inlined body of
|
|
/// a function. Construct DIE to represent this concrete inlined copy
|
|
/// of the function.
|
|
DIE *DwarfDebug::constructInlinedScopeDIE(DbgScope *Scope) {
|
|
unsigned StartID = MMI->MappedLabel(Scope->getStartLabelID());
|
|
unsigned EndID = MMI->MappedLabel(Scope->getEndLabelID());
|
|
assert (StartID && "Invalid starting label for an inlined scope!");
|
|
assert (EndID && "Invalid end label for an inlined scope!");
|
|
// Ignore empty scopes.
|
|
if (StartID == EndID && StartID != 0)
|
|
return NULL;
|
|
|
|
DIScope DS(Scope->getScopeNode());
|
|
if (DS.isNull())
|
|
return NULL;
|
|
DIE *ScopeDIE = new DIE(dwarf::DW_TAG_inlined_subroutine);
|
|
|
|
DISubprogram InlinedSP = getDISubprogram(DS.getNode());
|
|
DIE *OriginDIE = ModuleCU->getDIE(InlinedSP.getNode());
|
|
assert (OriginDIE && "Unable to find Origin DIE!");
|
|
addDIEEntry(ScopeDIE, dwarf::DW_AT_abstract_origin,
|
|
dwarf::DW_FORM_ref4, OriginDIE);
|
|
|
|
addLabel(ScopeDIE, dwarf::DW_AT_low_pc, dwarf::DW_FORM_addr,
|
|
DWLabel("label", StartID));
|
|
addLabel(ScopeDIE, dwarf::DW_AT_high_pc, dwarf::DW_FORM_addr,
|
|
DWLabel("label", EndID));
|
|
|
|
InlinedSubprogramDIEs.insert(OriginDIE);
|
|
|
|
// Track the start label for this inlined function.
|
|
DenseMap<MDNode *, SmallVector<InlineInfoLabels, 4> >::iterator
|
|
I = InlineInfo.find(InlinedSP.getNode());
|
|
|
|
if (I == InlineInfo.end()) {
|
|
InlineInfo[InlinedSP.getNode()].push_back(std::make_pair(StartID,
|
|
ScopeDIE));
|
|
InlinedSPNodes.push_back(InlinedSP.getNode());
|
|
} else
|
|
I->second.push_back(std::make_pair(StartID, ScopeDIE));
|
|
|
|
StringPool.insert(InlinedSP.getName());
|
|
StringPool.insert(getRealLinkageName(InlinedSP.getLinkageName()));
|
|
|
|
DILocation DL(Scope->getInlinedAt());
|
|
addUInt(ScopeDIE, dwarf::DW_AT_call_file, 0, ModuleCU->getID());
|
|
addUInt(ScopeDIE, dwarf::DW_AT_call_line, 0, DL.getLineNumber());
|
|
|
|
return ScopeDIE;
|
|
}
|
|
|
|
|
|
/// constructVariableDIE - Construct a DIE for the given DbgVariable.
|
|
DIE *DwarfDebug::constructVariableDIE(DbgVariable *DV, DbgScope *Scope) {
|
|
// Get the descriptor.
|
|
const DIVariable &VD = DV->getVariable();
|
|
StringRef Name = VD.getName();
|
|
if (Name.empty())
|
|
return NULL;
|
|
|
|
// 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);
|
|
|
|
|
|
DIE *AbsDIE = NULL;
|
|
if (DbgVariable *AV = DV->getAbstractVariable())
|
|
AbsDIE = AV->getDIE();
|
|
|
|
if (AbsDIE) {
|
|
DIScope DS(Scope->getScopeNode());
|
|
DISubprogram InlinedSP = getDISubprogram(DS.getNode());
|
|
DIE *OriginSPDIE = ModuleCU->getDIE(InlinedSP.getNode());
|
|
(void) OriginSPDIE;
|
|
assert (OriginSPDIE && "Unable to find Origin DIE for the SP!");
|
|
DIE *AbsDIE = DV->getAbstractVariable()->getDIE();
|
|
assert (AbsDIE && "Unable to find Origin DIE for the Variable!");
|
|
addDIEEntry(VariableDie, dwarf::DW_AT_abstract_origin,
|
|
dwarf::DW_FORM_ref4, AbsDIE);
|
|
}
|
|
else {
|
|
addString(VariableDie, dwarf::DW_AT_name, dwarf::DW_FORM_string, Name);
|
|
addSourceLine(VariableDie, &VD);
|
|
|
|
// Add variable type.
|
|
// FIXME: isBlockByrefVariable should be reformulated in terms of complex
|
|
// addresses instead.
|
|
if (VD.isBlockByrefVariable())
|
|
addType(VariableDie, getBlockByrefType(VD.getType(), Name));
|
|
else
|
|
addType(VariableDie, VD.getType());
|
|
}
|
|
|
|
// Add variable address.
|
|
if (!Scope->isAbstractScope()) {
|
|
MachineLocation Location;
|
|
unsigned FrameReg;
|
|
int Offset = RI->getFrameIndexReference(*MF, DV->getFrameIndex(), FrameReg);
|
|
Location.set(FrameReg, Offset);
|
|
|
|
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);
|
|
}
|
|
|
|
if (Tag == dwarf::DW_TAG_formal_parameter && VD.getType().isArtificial())
|
|
addUInt(VariableDie, dwarf::DW_AT_artificial, dwarf::DW_FORM_flag, 1);
|
|
DV->setDIE(VariableDie);
|
|
return VariableDie;
|
|
|
|
}
|
|
|
|
void DwarfDebug::addPubTypes(DISubprogram SP) {
|
|
DICompositeType SPTy = SP.getType();
|
|
unsigned SPTag = SPTy.getTag();
|
|
if (SPTag != dwarf::DW_TAG_subroutine_type)
|
|
return;
|
|
|
|
DIArray Args = SPTy.getTypeArray();
|
|
if (Args.isNull())
|
|
return;
|
|
|
|
for (unsigned i = 0, e = Args.getNumElements(); i != e; ++i) {
|
|
DIType ATy(Args.getElement(i).getNode());
|
|
if (ATy.isNull())
|
|
continue;
|
|
DICompositeType CATy = getDICompositeType(ATy);
|
|
if (!CATy.isNull() && !CATy.getName().empty()) {
|
|
if (DIEEntry *Entry = ModuleCU->getDIEEntry(CATy.getNode()))
|
|
ModuleCU->addGlobalType(CATy.getName(), Entry->getEntry());
|
|
}
|
|
}
|
|
}
|
|
|
|
/// constructScopeDIE - Construct a DIE for this scope.
|
|
DIE *DwarfDebug::constructScopeDIE(DbgScope *Scope) {
|
|
if (!Scope)
|
|
return NULL;
|
|
DIScope DS(Scope->getScopeNode());
|
|
if (DS.isNull())
|
|
return NULL;
|
|
|
|
DIE *ScopeDIE = NULL;
|
|
if (Scope->getInlinedAt())
|
|
ScopeDIE = constructInlinedScopeDIE(Scope);
|
|
else if (DS.isSubprogram()) {
|
|
if (Scope->isAbstractScope())
|
|
ScopeDIE = ModuleCU->getDIE(DS.getNode());
|
|
else
|
|
ScopeDIE = updateSubprogramScopeDIE(DS.getNode());
|
|
}
|
|
else {
|
|
ScopeDIE = constructLexicalScopeDIE(Scope);
|
|
if (!ScopeDIE) return NULL;
|
|
}
|
|
|
|
// Add variables to scope.
|
|
const SmallVector<DbgVariable *, 8> &Variables = Scope->getVariables();
|
|
for (unsigned i = 0, N = Variables.size(); i < N; ++i) {
|
|
DIE *VariableDIE = constructVariableDIE(Variables[i], Scope);
|
|
if (VariableDIE)
|
|
ScopeDIE->addChild(VariableDIE);
|
|
}
|
|
|
|
// Add nested scopes.
|
|
const SmallVector<DbgScope *, 4> &Scopes = Scope->getScopes();
|
|
for (unsigned j = 0, M = Scopes.size(); j < M; ++j) {
|
|
// Define the Scope debug information entry.
|
|
DIE *NestedDIE = constructScopeDIE(Scopes[j]);
|
|
if (NestedDIE)
|
|
ScopeDIE->addChild(NestedDIE);
|
|
}
|
|
|
|
if (DS.isSubprogram())
|
|
addPubTypes(DISubprogram(DS.getNode()));
|
|
|
|
return ScopeDIE;
|
|
}
|
|
|
|
/// 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(StringRef DirName, StringRef 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;
|
|
}
|
|
|
|
/// getOrCreateNameSpace - Create a DIE for DINameSpace.
|
|
DIE *DwarfDebug::getOrCreateNameSpace(DINameSpace NS) {
|
|
DIE *NDie = ModuleCU->getDIE(NS.getNode());
|
|
if (NDie)
|
|
return NDie;
|
|
NDie = new DIE(dwarf::DW_TAG_namespace);
|
|
ModuleCU->insertDIE(NS.getNode(), NDie);
|
|
if (!NS.getName().empty())
|
|
addString(NDie, dwarf::DW_AT_name, dwarf::DW_FORM_string, NS.getName());
|
|
addSourceLine(NDie, &NS);
|
|
addToContextOwner(NDie, NS.getContext());
|
|
return NDie;
|
|
}
|
|
|
|
CompileUnit *DwarfDebug::constructCompileUnit(MDNode *N) {
|
|
DICompileUnit DIUnit(N);
|
|
StringRef FN = DIUnit.getFilename();
|
|
StringRef 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.empty())
|
|
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);
|
|
|
|
StringRef Flags = DIUnit.getFlags();
|
|
if (!Flags.empty())
|
|
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;
|
|
return 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.
|
|
if (ModuleCU->getDIE(DI_GV.getNode()))
|
|
return;
|
|
|
|
DIE *VariableDie = createGlobalVariableDIE(DI_GV);
|
|
if (!VariableDie)
|
|
return;
|
|
|
|
// Add to map.
|
|
ModuleCU->insertDIE(N, VariableDie);
|
|
|
|
// Add to context owner.
|
|
DIDescriptor GVContext = DI_GV.getContext();
|
|
// Do not create specification DIE if context is either compile unit
|
|
// or a subprogram.
|
|
if (DI_GV.isDefinition() && !GVContext.isCompileUnit()
|
|
&& !GVContext.isSubprogram()) {
|
|
// Create specification DIE.
|
|
DIE *VariableSpecDIE = new DIE(dwarf::DW_TAG_variable);
|
|
addDIEEntry(VariableSpecDIE, dwarf::DW_AT_specification,
|
|
dwarf::DW_FORM_ref4, VariableDie);
|
|
DIEBlock *Block = new DIEBlock();
|
|
addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_addr);
|
|
addObjectLabel(Block, 0, dwarf::DW_FORM_udata,
|
|
Asm->GetGlobalValueSymbol(DI_GV.getGlobal()));
|
|
addBlock(VariableSpecDIE, dwarf::DW_AT_location, 0, Block);
|
|
addUInt(VariableDie, dwarf::DW_AT_declaration, dwarf::DW_FORM_flag, 1);
|
|
ModuleCU->addDie(VariableSpecDIE);
|
|
} else {
|
|
DIEBlock *Block = new DIEBlock();
|
|
addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_addr);
|
|
addObjectLabel(Block, 0, dwarf::DW_FORM_udata,
|
|
Asm->GetGlobalValueSymbol(DI_GV.getGlobal()));
|
|
addBlock(VariableDie, dwarf::DW_AT_location, 0, Block);
|
|
}
|
|
addToContextOwner(VariableDie, GVContext);
|
|
|
|
// Expose as global. FIXME - need to check external flag.
|
|
ModuleCU->addGlobal(DI_GV.getName(), VariableDie);
|
|
|
|
DIType GTy = DI_GV.getType();
|
|
if (GTy.isCompositeType() && !GTy.getName().empty()) {
|
|
DIEEntry *Entry = ModuleCU->getDIEEntry(GTy.getNode());
|
|
assert (Entry && "Missing global type!");
|
|
ModuleCU->addGlobalType(GTy.getName(), Entry->getEntry());
|
|
}
|
|
return;
|
|
}
|
|
|
|
void DwarfDebug::constructSubprogramDIE(MDNode *N) {
|
|
DISubprogram SP(N);
|
|
|
|
// Check for pre-existence.
|
|
if (ModuleCU->getDIE(N))
|
|
return;
|
|
|
|
if (!SP.isDefinition())
|
|
// This is a method declaration which will be handled while constructing
|
|
// class type.
|
|
return;
|
|
|
|
DIE *SubprogramDie = createSubprogramDIE(SP);
|
|
|
|
// Add to map.
|
|
ModuleCU->insertDIE(N, SubprogramDie);
|
|
|
|
// Add to context owner.
|
|
addToContextOwner(SubprogramDie, SP.getContext());
|
|
|
|
// 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();
|
|
|
|
if (!MAI->doesSupportDebugInformation())
|
|
return;
|
|
|
|
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 (CompileUnitMap.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 = CompileUnitMap.begin()->second;
|
|
|
|
// Create DIEs for each subprogram.
|
|
for (DebugInfoFinder::iterator I = DbgFinder.subprogram_begin(),
|
|
E = DbgFinder.subprogram_end(); I != E; ++I)
|
|
constructSubprogramDIE(*I);
|
|
|
|
// Create DIEs for each global variable.
|
|
for (DebugInfoFinder::iterator I = DbgFinder.global_variable_begin(),
|
|
E = DbgFinder.global_variable_end(); I != E; ++I)
|
|
constructGlobalVariableDIE(*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);
|
|
// FIXME: don't use sys::path for this! This should not depend on the
|
|
// host.
|
|
sys::Path FullPath(getSourceDirectoryName(Id.first));
|
|
bool AppendOk =
|
|
FullPath.appendComponent(getSourceFileName(Id.second));
|
|
assert(AppendOk && "Could not append filename to directory!");
|
|
AppendOk = false;
|
|
Asm->OutStreamer.EmitDwarfFileDirective(i, FullPath.str());
|
|
}
|
|
}
|
|
|
|
// 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();
|
|
|
|
// Attach DW_AT_inline attribute with inlined subprogram DIEs.
|
|
for (SmallPtrSet<DIE *, 4>::iterator AI = InlinedSubprogramDIEs.begin(),
|
|
AE = InlinedSubprogramDIEs.end(); AI != AE; ++AI) {
|
|
DIE *ISP = *AI;
|
|
addUInt(ISP, dwarf::DW_AT_inline, 0, dwarf::DW_INL_inlined);
|
|
}
|
|
|
|
// Insert top level DIEs.
|
|
for (SmallVector<DIE *, 4>::iterator TI = TopLevelDIEsVector.begin(),
|
|
TE = TopLevelDIEsVector.end(); TI != TE; ++TI)
|
|
ModuleCU->getCUDie()->addChild(*TI);
|
|
|
|
for (DenseMap<DIE *, MDNode *>::iterator CI = ContainingTypeMap.begin(),
|
|
CE = ContainingTypeMap.end(); CI != CE; ++CI) {
|
|
DIE *SPDie = CI->first;
|
|
MDNode *N = dyn_cast_or_null<MDNode>(CI->second);
|
|
if (!N) continue;
|
|
DIE *NDie = ModuleCU->getDIE(N);
|
|
if (!NDie) continue;
|
|
addDIEEntry(SPDie, dwarf::DW_AT_containing_type, dwarf::DW_FORM_ref4, NDie);
|
|
// FIXME - This is not the correct approach.
|
|
// addDIEEntry(NDie, dwarf::DW_AT_containing_type, dwarf::DW_FORM_ref4, NDie);
|
|
}
|
|
|
|
// 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.
|
|
computeSizeAndOffsets();
|
|
|
|
// 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 pubtypes section.
|
|
emitDebugPubTypes();
|
|
|
|
// 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();
|
|
|
|
// Clear debug info in preparation for the next Module.
|
|
ModuleCU = NULL;
|
|
DeleteContainerSeconds(CompileUnitMap);
|
|
|
|
if (TimePassesIsEnabled)
|
|
DebugTimer->stopTimer();
|
|
}
|
|
|
|
/// findAbstractVariable - Find abstract variable, if any, associated with Var.
|
|
DbgVariable *DwarfDebug::findAbstractVariable(DIVariable &Var,
|
|
unsigned FrameIdx,
|
|
DILocation &ScopeLoc) {
|
|
|
|
DbgVariable *AbsDbgVariable = AbstractVariables.lookup(Var.getNode());
|
|
if (AbsDbgVariable)
|
|
return AbsDbgVariable;
|
|
|
|
DbgScope *Scope = AbstractScopes.lookup(ScopeLoc.getScope().getNode());
|
|
if (!Scope)
|
|
return NULL;
|
|
|
|
AbsDbgVariable = new DbgVariable(Var, FrameIdx);
|
|
Scope->addVariable(AbsDbgVariable);
|
|
AbstractVariables[Var.getNode()] = AbsDbgVariable;
|
|
return AbsDbgVariable;
|
|
}
|
|
|
|
/// 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) {
|
|
MDNode *Var = VI->first;
|
|
if (!Var) continue;
|
|
DIVariable DV (Var);
|
|
std::pair< unsigned, MDNode *> VP = VI->second;
|
|
DILocation ScopeLoc(VP.second);
|
|
|
|
DbgScope *Scope =
|
|
ConcreteScopes.lookup(ScopeLoc.getOrigLocation().getNode());
|
|
if (!Scope)
|
|
Scope = DbgScopeMap.lookup(ScopeLoc.getScope().getNode());
|
|
// If variable scope is not found then skip this variable.
|
|
if (!Scope)
|
|
continue;
|
|
|
|
DbgVariable *RegVar = new DbgVariable(DV, VP.first);
|
|
Scope->addVariable(RegVar);
|
|
if (DbgVariable *AbsDbgVariable = findAbstractVariable(DV, VP.first,
|
|
ScopeLoc))
|
|
RegVar->setAbstractVariable(AbsDbgVariable);
|
|
}
|
|
}
|
|
|
|
/// beginScope - Process beginning of a scope starting at Label.
|
|
void DwarfDebug::beginScope(const MachineInstr *MI, unsigned Label) {
|
|
InsnToDbgScopeMapTy::iterator I = DbgScopeBeginMap.find(MI);
|
|
if (I == DbgScopeBeginMap.end())
|
|
return;
|
|
ScopeVector &SD = I->second;
|
|
for (ScopeVector::iterator SDI = SD.begin(), SDE = SD.end();
|
|
SDI != SDE; ++SDI)
|
|
(*SDI)->setStartLabelID(Label);
|
|
}
|
|
|
|
/// endScope - Process end of a scope.
|
|
void DwarfDebug::endScope(const MachineInstr *MI) {
|
|
InsnToDbgScopeMapTy::iterator I = DbgScopeEndMap.find(MI);
|
|
if (I == DbgScopeEndMap.end())
|
|
return;
|
|
|
|
unsigned Label = MMI->NextLabelID();
|
|
Asm->printLabel(Label);
|
|
O << '\n';
|
|
|
|
SmallVector<DbgScope *, 2> &SD = I->second;
|
|
for (SmallVector<DbgScope *, 2>::iterator SDI = SD.begin(), SDE = SD.end();
|
|
SDI != SDE; ++SDI)
|
|
(*SDI)->setEndLabelID(Label);
|
|
return;
|
|
}
|
|
|
|
/// createDbgScope - Create DbgScope for the scope.
|
|
void DwarfDebug::createDbgScope(MDNode *Scope, MDNode *InlinedAt) {
|
|
|
|
if (!InlinedAt) {
|
|
DbgScope *WScope = DbgScopeMap.lookup(Scope);
|
|
if (WScope)
|
|
return;
|
|
WScope = new DbgScope(NULL, DIDescriptor(Scope), NULL);
|
|
DbgScopeMap.insert(std::make_pair(Scope, WScope));
|
|
if (DIDescriptor(Scope).isLexicalBlock())
|
|
createDbgScope(DILexicalBlock(Scope).getContext().getNode(), NULL);
|
|
return;
|
|
}
|
|
|
|
DbgScope *WScope = DbgScopeMap.lookup(InlinedAt);
|
|
if (WScope)
|
|
return;
|
|
|
|
WScope = new DbgScope(NULL, DIDescriptor(Scope), InlinedAt);
|
|
DbgScopeMap.insert(std::make_pair(InlinedAt, WScope));
|
|
DILocation DL(InlinedAt);
|
|
createDbgScope(DL.getScope().getNode(), DL.getOrigLocation().getNode());
|
|
}
|
|
|
|
/// extractScopeInformation - Scan machine instructions in this function
|
|
/// and collect DbgScopes. Return true, if atleast one scope was found.
|
|
bool DwarfDebug::extractScopeInformation() {
|
|
// 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;
|
|
|
|
DenseMap<const MachineInstr *, unsigned> MIIndexMap;
|
|
unsigned MIIndex = 0;
|
|
// Scan each instruction and create scopes. First build working set of 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;
|
|
MIIndexMap[MInsn] = MIIndex++;
|
|
DebugLoc DL = MInsn->getDebugLoc();
|
|
if (DL.isUnknown()) continue;
|
|
DILocation DLT = MF->getDILocation(DL);
|
|
DIScope DLTScope = DLT.getScope();
|
|
if (DLTScope.isNull()) 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.
|
|
if (DLTScope.isCompileUnit()) continue;
|
|
createDbgScope(DLTScope.getNode(), DLT.getOrigLocation().getNode());
|
|
}
|
|
}
|
|
|
|
|
|
// Build scope hierarchy using working set of 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;
|
|
DILocation DLT = MF->getDILocation(DL);
|
|
DIScope DLTScope = DLT.getScope();
|
|
if (DLTScope.isNull()) 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.
|
|
if (DLTScope.isCompileUnit()) continue;
|
|
DbgScope *Scope = getUpdatedDbgScope(DLTScope.getNode(), MInsn,
|
|
DLT.getOrigLocation().getNode());
|
|
Scope->setLastInsn(MInsn);
|
|
}
|
|
}
|
|
|
|
if (!CurrentFnDbgScope)
|
|
return false;
|
|
|
|
CurrentFnDbgScope->fixInstructionMarkers(MIIndexMap);
|
|
|
|
// 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. Ignore scopes that are not reachable.
|
|
SmallVector<DbgScope *, 4> WorkList;
|
|
WorkList.push_back(CurrentFnDbgScope);
|
|
while (!WorkList.empty()) {
|
|
DbgScope *S = WorkList.back(); WorkList.pop_back();
|
|
|
|
const SmallVector<DbgScope *, 4> &Children = S->getScopes();
|
|
if (!Children.empty())
|
|
for (SmallVector<DbgScope *, 4>::const_iterator SI = Children.begin(),
|
|
SE = Children.end(); SI != SE; ++SI)
|
|
WorkList.push_back(*SI);
|
|
|
|
if (S->isAbstractScope())
|
|
continue;
|
|
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[MI].push_back(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[MI].push_back(S);
|
|
}
|
|
|
|
return !DbgScopeMap.empty();
|
|
}
|
|
|
|
/// beginFunction - Gather pre-function debug information. Assumes being
|
|
/// emitted immediately after the function entry point.
|
|
void DwarfDebug::beginFunction(const MachineFunction *MF) {
|
|
this->MF = MF;
|
|
|
|
if (!ShouldEmitDwarfDebug()) return;
|
|
|
|
if (TimePassesIsEnabled)
|
|
DebugTimer->startTimer();
|
|
|
|
if (!extractScopeInformation())
|
|
return;
|
|
|
|
collectVariableInfo();
|
|
|
|
// 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.
|
|
DebugLoc FDL = MF->getDefaultDebugLoc();
|
|
if (!FDL.isUnknown()) {
|
|
DILocation DLT = MF->getDILocation(FDL);
|
|
unsigned LabelID = 0;
|
|
DISubprogram SP = getDISubprogram(DLT.getScope().getNode());
|
|
if (!SP.isNull())
|
|
LabelID = recordSourceLine(SP.getLineNumber(), 0,
|
|
DLT.getScope().getNode());
|
|
else
|
|
LabelID = recordSourceLine(DLT.getLineNumber(),
|
|
DLT.getColumnNumber(),
|
|
DLT.getScope().getNode());
|
|
Asm->printLabel(LabelID);
|
|
O << '\n';
|
|
}
|
|
if (TimePassesIsEnabled)
|
|
DebugTimer->stopTimer();
|
|
}
|
|
|
|
/// endFunction - Gather and emit post-function debug information.
|
|
///
|
|
void DwarfDebug::endFunction(const MachineFunction *MF) {
|
|
if (!ShouldEmitDwarfDebug()) return;
|
|
|
|
if (TimePassesIsEnabled)
|
|
DebugTimer->startTimer();
|
|
|
|
if (DbgScopeMap.empty())
|
|
return;
|
|
|
|
if (CurrentFnDbgScope) {
|
|
// 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 abstract scopes.
|
|
for (SmallVector<DbgScope *, 4>::iterator AI = AbstractScopesList.begin(),
|
|
AE = AbstractScopesList.end(); AI != AE; ++AI)
|
|
constructScopeDIE(*AI);
|
|
|
|
constructScopeDIE(CurrentFnDbgScope);
|
|
|
|
DebugFrames.push_back(FunctionDebugFrameInfo(SubprogramCount,
|
|
MMI->getFrameMoves()));
|
|
}
|
|
|
|
// Clear debug info
|
|
CurrentFnDbgScope = NULL;
|
|
DeleteContainerSeconds(DbgScopeMap);
|
|
DbgScopeBeginMap.clear();
|
|
DbgScopeEndMap.clear();
|
|
ConcreteScopes.clear();
|
|
DeleteContainerSeconds(AbstractScopes);
|
|
AbstractScopesList.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();
|
|
|
|
StringRef Dir;
|
|
StringRef Fn;
|
|
|
|
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;
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// Emit Methods
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
/// computeSizeAndOffset - Compute the size and offset of a DIE.
|
|
///
|
|
unsigned
|
|
DwarfDebug::computeSizeAndOffset(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 = computeSizeAndOffset(Children[j], Offset, (j + 1) == M);
|
|
|
|
// End of children marker.
|
|
Offset += sizeof(int8_t);
|
|
}
|
|
|
|
Die->setSize(Offset - Die->getOffset());
|
|
return Offset;
|
|
}
|
|
|
|
/// computeSizeAndOffsets - Compute the size and offset of all the DIEs.
|
|
///
|
|
void DwarfDebug::computeSizeAndOffsets() {
|
|
// 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)
|
|
|
|
computeSizeAndOffset(ModuleCU->getCUDie(), 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.getDwarfPubTypesSection());
|
|
EmitLabel("section_pubtypes", 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->O << '\n';
|
|
|
|
// Emit the code (index) for the abbreviation.
|
|
if (Asm->VerboseAsm)
|
|
Asm->OutStreamer.AddComment("Abbrev [" + Twine(AbbrevNumber) + "] 0x" +
|
|
Twine::utohexstr(Die->getOffset()) + ":0x" +
|
|
Twine::utohexstr(Die->getSize()) + " " +
|
|
dwarf::TagString(Abbrev->getTag()));
|
|
EmitULEB128(AbbrevNumber);
|
|
|
|
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)");
|
|
|
|
if (Asm->VerboseAsm)
|
|
Asm->OutStreamer.AddComment(dwarf::AttributeString(Attr));
|
|
|
|
switch (Attr) {
|
|
case dwarf::DW_AT_sibling:
|
|
Asm->EmitInt32(Die->getSiblingOffset());
|
|
break;
|
|
case dwarf::DW_AT_abstract_origin: {
|
|
DIEEntry *E = cast<DIEEntry>(Values[i]);
|
|
DIE *Origin = E->getEntry();
|
|
unsigned Addr = Origin->getOffset();
|
|
Asm->EmitInt32(Addr);
|
|
break;
|
|
}
|
|
default:
|
|
// Emit an attribute using the defined form.
|
|
Values[i]->EmitValue(this, Form);
|
|
O << "\n"; // REMOVE This once all EmitValue impls emit their own newline.
|
|
break;
|
|
}
|
|
}
|
|
|
|
// 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); EOL("End Of Children Mark");
|
|
}
|
|
}
|
|
|
|
/// emitDebugInfo - Emit the debug info section.
|
|
///
|
|
void DwarfDebug::emitDebugInfo() {
|
|
// Start debug info section.
|
|
Asm->OutStreamer.SwitchSection(
|
|
Asm->getObjFileLowering().getDwarfInfoSection());
|
|
DIE *Die = ModuleCU->getCUDie();
|
|
|
|
// Emit the compile units header.
|
|
EmitLabel("info_begin", ModuleCU->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); EOL("Length of Compilation Unit Info");
|
|
Asm->EmitInt16(dwarf::DWARF_VERSION); EOL("DWARF version number");
|
|
EmitSectionOffset("abbrev_begin", "section_abbrev", 0, 0, true, false);
|
|
EOL("Offset Into Abbrev. Section");
|
|
Asm->EmitInt8(TD->getPointerSize()); EOL("Address Size (in bytes)");
|
|
|
|
emitDIE(Die);
|
|
// FIXME - extra padding for gdb bug.
|
|
Asm->EmitInt8(0); EOL("Extra Pad For GDB");
|
|
Asm->EmitInt8(0); EOL("Extra Pad For GDB");
|
|
Asm->EmitInt8(0); EOL("Extra Pad For GDB");
|
|
Asm->EmitInt8(0); EOL("Extra Pad For GDB");
|
|
EmitLabel("info_end", ModuleCU->getID());
|
|
Asm->O << '\n';
|
|
}
|
|
|
|
/// 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.)
|
|
EmitULEB128(Abbrev->getNumber(), "Abbreviation Code");
|
|
|
|
// Emit the abbreviations data.
|
|
Abbrev->Emit(this);
|
|
Asm->O << '\n';
|
|
}
|
|
|
|
// Mark end of abbreviations.
|
|
EmitULEB128(0, "EOM(3)");
|
|
|
|
EmitLabel("abbrev_end", 0);
|
|
Asm->O << '\n';
|
|
}
|
|
}
|
|
|
|
/// 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); EOL("Extended Op");
|
|
Asm->EmitInt8(TD->getPointerSize() + 1); EOL("Op size");
|
|
Asm->EmitInt8(dwarf::DW_LNE_set_address); EOL("DW_LNE_set_address");
|
|
EmitReference("section_end", SectionEnd); EOL("Section end label");
|
|
|
|
// Mark end of matrix.
|
|
Asm->EmitInt8(0); EOL("DW_LNE_end_sequence");
|
|
Asm->EmitInt8(1);
|
|
Asm->EmitInt8(1);
|
|
}
|
|
|
|
/// 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);
|
|
EOL("Length of Source Line Info");
|
|
EmitLabel("line_begin", 0);
|
|
|
|
Asm->EmitInt16(dwarf::DWARF_VERSION); EOL("DWARF version number");
|
|
|
|
EmitDifference("line_prolog_end", 0, "line_prolog_begin", 0, true);
|
|
EOL("Prolog Length");
|
|
EmitLabel("line_prolog_begin", 0);
|
|
|
|
Asm->EmitInt8(1); EOL("Minimum Instruction Length");
|
|
Asm->EmitInt8(1); EOL("Default is_stmt_start flag");
|
|
Asm->EmitInt8(MinLineDelta); EOL("Line Base Value (Special Opcodes)");
|
|
Asm->EmitInt8(MaxLineDelta); EOL("Line Range Value (Special Opcodes)");
|
|
Asm->EmitInt8(-MinLineDelta); EOL("Special Opcode Base");
|
|
|
|
// Line number standard opcode encodings argument count
|
|
Asm->EmitInt8(0); EOL("DW_LNS_copy arg count");
|
|
Asm->EmitInt8(1); EOL("DW_LNS_advance_pc arg count");
|
|
Asm->EmitInt8(1); EOL("DW_LNS_advance_line arg count");
|
|
Asm->EmitInt8(1); EOL("DW_LNS_set_file arg count");
|
|
Asm->EmitInt8(1); EOL("DW_LNS_set_column arg count");
|
|
Asm->EmitInt8(0); EOL("DW_LNS_negate_stmt arg count");
|
|
Asm->EmitInt8(0); EOL("DW_LNS_set_basic_block arg count");
|
|
Asm->EmitInt8(0); EOL("DW_LNS_const_add_pc arg count");
|
|
Asm->EmitInt8(1); EOL("DW_LNS_fixed_advance_pc arg count");
|
|
|
|
// Emit directories.
|
|
for (unsigned DI = 1, DE = getNumSourceDirectories()+1; DI != DE; ++DI) {
|
|
const std::string &Dir = getSourceDirectoryName(DI);
|
|
if (Asm->VerboseAsm) Asm->OutStreamer.AddComment("Directory");
|
|
Asm->OutStreamer.EmitBytes(StringRef(Dir.c_str(), Dir.size()+1), 0);
|
|
}
|
|
|
|
Asm->EmitInt8(0); 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);
|
|
const std::string &FN = getSourceFileName(Id.second);
|
|
if (Asm->VerboseAsm) Asm->OutStreamer.AddComment("Source");
|
|
Asm->OutStreamer.EmitBytes(StringRef(FN.c_str(), FN.size()+1), 0);
|
|
|
|
EmitULEB128(Id.first, "Directory #");
|
|
EmitULEB128(0, "Mod date");
|
|
EmitULEB128(0, "File size");
|
|
}
|
|
|
|
Asm->EmitInt8(0); 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->O << '\n';
|
|
|
|
// 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->O << '\n';
|
|
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); EOL("Extended Op");
|
|
Asm->EmitInt8(TD->getPointerSize() + 1); EOL("Op size");
|
|
Asm->EmitInt8(dwarf::DW_LNE_set_address); EOL("DW_LNE_set_address");
|
|
EmitReference("label", LabelID); 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); EOL("DW_LNS_set_file");
|
|
EmitULEB128(Source, "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); EOL("Line Delta");
|
|
} else {
|
|
// ... otherwise use long hand.
|
|
Asm->EmitInt8(dwarf::DW_LNS_advance_line);
|
|
EOL("DW_LNS_advance_line");
|
|
EmitSLEB128(Offset, "Line Offset");
|
|
Asm->EmitInt8(dwarf::DW_LNS_copy); EOL("DW_LNS_copy");
|
|
}
|
|
} else {
|
|
// Copy the previous row (different address or source)
|
|
Asm->EmitInt8(dwarf::DW_LNS_copy); 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->O << '\n';
|
|
}
|
|
|
|
/// 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);
|
|
EOL("Length of Common Information Entry");
|
|
|
|
EmitLabel("debug_frame_common_begin", 0);
|
|
Asm->EmitInt32((int)dwarf::DW_CIE_ID);
|
|
EOL("CIE Identifier Tag");
|
|
Asm->EmitInt8(dwarf::DW_CIE_VERSION);
|
|
EOL("CIE Version");
|
|
Asm->OutStreamer.EmitIntValue(0, 1, /*addrspace*/0); // nul terminator.
|
|
EOL("CIE Augmentation");
|
|
EmitULEB128(1, "CIE Code Alignment Factor");
|
|
EmitSLEB128(stackGrowth, "CIE Data Alignment Factor");
|
|
Asm->EmitInt8(RI->getDwarfRegNum(RI->getRARegister(), false));
|
|
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->O << '\n';
|
|
}
|
|
|
|
/// 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);
|
|
EOL("Length of Frame Information Entry");
|
|
|
|
EmitLabel("debug_frame_begin", DebugFrameInfo.Number);
|
|
|
|
EmitSectionOffset("debug_frame_common", "section_debug_frame",
|
|
0, 0, true, false);
|
|
EOL("FDE CIE offset");
|
|
|
|
EmitReference("func_begin", DebugFrameInfo.Number);
|
|
EOL("FDE initial location");
|
|
EmitDifference("func_end", DebugFrameInfo.Number,
|
|
"func_begin", DebugFrameInfo.Number);
|
|
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->O << '\n';
|
|
}
|
|
|
|
/// emitDebugPubNames - Emit visible names into a debug pubnames section.
|
|
///
|
|
void DwarfDebug::emitDebugPubNames() {
|
|
// Start the dwarf pubnames section.
|
|
Asm->OutStreamer.SwitchSection(
|
|
Asm->getObjFileLowering().getDwarfPubNamesSection());
|
|
|
|
EmitDifference("pubnames_end", ModuleCU->getID(),
|
|
"pubnames_begin", ModuleCU->getID(), true);
|
|
EOL("Length of Public Names Info");
|
|
|
|
EmitLabel("pubnames_begin", ModuleCU->getID());
|
|
|
|
Asm->EmitInt16(dwarf::DWARF_VERSION); EOL("DWARF Version");
|
|
|
|
EmitSectionOffset("info_begin", "section_info",
|
|
ModuleCU->getID(), 0, true, false);
|
|
EOL("Offset of Compilation Unit Info");
|
|
|
|
EmitDifference("info_end", ModuleCU->getID(), "info_begin", ModuleCU->getID(),
|
|
true);
|
|
EOL("Compilation Unit Length");
|
|
|
|
const StringMap<DIE*> &Globals = ModuleCU->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()); EOL("DIE offset");
|
|
|
|
if (Asm->VerboseAsm)
|
|
Asm->OutStreamer.AddComment("External Name");
|
|
Asm->OutStreamer.EmitBytes(StringRef(Name, strlen(Name)+1), 0);
|
|
}
|
|
|
|
Asm->EmitInt32(0); EOL("End Mark");
|
|
EmitLabel("pubnames_end", ModuleCU->getID());
|
|
Asm->O << '\n';
|
|
}
|
|
|
|
void DwarfDebug::emitDebugPubTypes() {
|
|
// Start the dwarf pubnames section.
|
|
Asm->OutStreamer.SwitchSection(
|
|
Asm->getObjFileLowering().getDwarfPubTypesSection());
|
|
EmitDifference("pubtypes_end", ModuleCU->getID(),
|
|
"pubtypes_begin", ModuleCU->getID(), true);
|
|
EOL("Length of Public Types Info");
|
|
|
|
EmitLabel("pubtypes_begin", ModuleCU->getID());
|
|
|
|
if (Asm->VerboseAsm) Asm->OutStreamer.AddComment("DWARF Version");
|
|
Asm->EmitInt16(dwarf::DWARF_VERSION);
|
|
|
|
EmitSectionOffset("info_begin", "section_info",
|
|
ModuleCU->getID(), 0, true, false);
|
|
EOL("Offset of Compilation ModuleCU Info");
|
|
|
|
EmitDifference("info_end", ModuleCU->getID(), "info_begin", ModuleCU->getID(),
|
|
true);
|
|
EOL("Compilation ModuleCU Length");
|
|
|
|
const StringMap<DIE*> &Globals = ModuleCU->getGlobalTypes();
|
|
for (StringMap<DIE*>::const_iterator
|
|
GI = Globals.begin(), GE = Globals.end(); GI != GE; ++GI) {
|
|
const char *Name = GI->getKeyData();
|
|
DIE * Entity = GI->second;
|
|
|
|
if (Asm->VerboseAsm) Asm->OutStreamer.AddComment("DIE offset");
|
|
Asm->EmitInt32(Entity->getOffset());
|
|
|
|
if (Asm->VerboseAsm) Asm->OutStreamer.AddComment("External Name");
|
|
Asm->OutStreamer.EmitBytes(StringRef(Name, GI->getKeyLength()+1), 0);
|
|
}
|
|
|
|
Asm->EmitInt32(0); EOL("End Mark");
|
|
EmitLabel("pubtypes_end", ModuleCU->getID());
|
|
Asm->O << '\n';
|
|
}
|
|
|
|
/// 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->OutStreamer.EmitBytes(StringRef(String.c_str(), String.size()+1), 0);
|
|
}
|
|
|
|
Asm->O << '\n';
|
|
}
|
|
}
|
|
|
|
/// emitDebugLoc - Emit visible names into a debug loc section.
|
|
///
|
|
void DwarfDebug::emitDebugLoc() {
|
|
// Start the dwarf loc section.
|
|
Asm->OutStreamer.SwitchSection(
|
|
Asm->getObjFileLowering().getDwarfLocSection());
|
|
}
|
|
|
|
/// 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); EOL("Length of Address Ranges Info");
|
|
|
|
Asm->EmitInt16(dwarf::DWARF_VERSION); EOL("Dwarf Version");
|
|
|
|
EmitReference("info_begin", Unit->getID());
|
|
EOL("Offset of Compilation Unit Info");
|
|
|
|
Asm->EmitInt8(TD->getPointerSize()); EOL("Size of Address");
|
|
|
|
Asm->EmitInt8(0); EOL("Size of Segment Descriptor");
|
|
|
|
Asm->EmitInt16(0); EOL("Pad (1)");
|
|
Asm->EmitInt16(0); EOL("Pad (2)");
|
|
|
|
// Range 1
|
|
EmitReference("text_begin", 0); EOL("Address");
|
|
EmitDifference("text_end", 0, "text_begin", 0, true); EOL("Length");
|
|
|
|
Asm->EmitInt32(0); EOL("EOM (1)");
|
|
Asm->EmitInt32(0); EOL("EOM (2)");
|
|
#endif
|
|
}
|
|
|
|
/// emitDebugRanges - Emit visible names into a debug ranges section.
|
|
///
|
|
void DwarfDebug::emitDebugRanges() {
|
|
// Start the dwarf ranges section.
|
|
Asm->OutStreamer.SwitchSection(
|
|
Asm->getObjFileLowering().getDwarfRangesSection());
|
|
}
|
|
|
|
/// 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);
|
|
}
|
|
}
|
|
|
|
/// 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());
|
|
|
|
EmitDifference("debug_inlined_end", 1,
|
|
"debug_inlined_begin", 1, true);
|
|
EOL("Length of Debug Inlined Information Entry");
|
|
|
|
EmitLabel("debug_inlined_begin", 1);
|
|
|
|
Asm->EmitInt16(dwarf::DWARF_VERSION); EOL("Dwarf Version");
|
|
Asm->EmitInt8(TD->getPointerSize()); EOL("Address Size (in bytes)");
|
|
|
|
for (SmallVector<MDNode *, 4>::iterator I = InlinedSPNodes.begin(),
|
|
E = InlinedSPNodes.end(); I != E; ++I) {
|
|
|
|
MDNode *Node = *I;
|
|
DenseMap<MDNode *, SmallVector<InlineInfoLabels, 4> >::iterator II
|
|
= InlineInfo.find(Node);
|
|
SmallVector<InlineInfoLabels, 4> &Labels = II->second;
|
|
DISubprogram SP(Node);
|
|
StringRef LName = SP.getLinkageName();
|
|
StringRef Name = SP.getName();
|
|
|
|
if (LName.empty()) {
|
|
Asm->OutStreamer.EmitBytes(Name, 0);
|
|
Asm->OutStreamer.EmitIntValue(0, 1, 0); // nul terminator.
|
|
} else
|
|
EmitSectionOffset("string", "section_str",
|
|
StringPool.idFor(getRealLinkageName(LName)), false, true);
|
|
|
|
EOL("MIPS linkage name");
|
|
EmitSectionOffset("string", "section_str",
|
|
StringPool.idFor(Name), false, true);
|
|
EOL("Function name");
|
|
EmitULEB128(Labels.size(), "Inline count");
|
|
|
|
for (SmallVector<InlineInfoLabels, 4>::iterator LI = Labels.begin(),
|
|
LE = Labels.end(); LI != LE; ++LI) {
|
|
DIE *SP = LI->second;
|
|
Asm->EmitInt32(SP->getOffset()); EOL("DIE offset");
|
|
|
|
if (TD->getPointerSize() == sizeof(int32_t))
|
|
O << MAI->getData32bitsDirective();
|
|
else
|
|
O << MAI->getData64bitsDirective();
|
|
|
|
PrintLabelName("label", LI->first); EOL("low_pc");
|
|
}
|
|
}
|
|
|
|
EmitLabel("debug_inlined_end", 1);
|
|
Asm->O << '\n';
|
|
}
|