#define DEBUG_TYPE "dwarfdebug"
#include "DwarfDebug.h"
#include "DIE.h"
+#include "DwarfAccelTable.h"
+#include "DwarfCompileUnit.h"
#include "llvm/Constants.h"
#include "llvm/Module.h"
#include "llvm/Instructions.h"
+#include "llvm/ADT/Triple.h"
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/CodeGen/MachineModuleInfo.h"
#include "llvm/MC/MCAsmInfo.h"
#include "llvm/MC/MCSection.h"
#include "llvm/MC/MCStreamer.h"
#include "llvm/MC/MCSymbol.h"
-#include "llvm/Target/Mangler.h"
#include "llvm/Target/TargetData.h"
#include "llvm/Target/TargetFrameLowering.h"
#include "llvm/Target/TargetLoweringObjectFile.h"
#include "llvm/Target/TargetRegisterInfo.h"
#include "llvm/Target/TargetOptions.h"
#include "llvm/Analysis/DebugInfo.h"
+#include "llvm/Analysis/DIBuilder.h"
#include "llvm/ADT/Statistic.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/Support/Path.h"
using namespace llvm;
-static cl::opt<bool> PrintDbgScope("print-dbgscope", cl::Hidden,
- cl::desc("Print DbgScope information for each machine instruction"));
-
static cl::opt<bool> DisableDebugInfoPrinting("disable-debug-info-print",
cl::Hidden,
cl::desc("Disable debug info printing"));
static cl::opt<bool> UnknownLocations("use-unknown-locations", cl::Hidden,
- cl::desc("Make an absense of debug location information explicit."),
+ cl::desc("Make an absence of debug location information explicit."),
cl::init(false));
-#ifndef NDEBUG
-STATISTIC(BlocksWithoutLineNo, "Number of blocks without any line number");
-#endif
+static cl::opt<bool> DwarfAccelTables("dwarf-accel-tables", cl::Hidden,
+ cl::desc("Output prototype dwarf accelerator tables."),
+ cl::init(false));
namespace {
const char *DWARFGroupName = "DWARF Emission";
namespace llvm {
-//===----------------------------------------------------------------------===//
-/// CompileUnit - This dwarf writer support class manages information associate
-/// with a source file.
-class CompileUnit {
- /// ID - File identifier for source.
- ///
- unsigned ID;
-
- /// Die - Compile unit debug information entry.
- ///
- const OwningPtr<DIE> CUDie;
-
- /// IndexTyDie - An anonymous type for index type. Owned by CUDie.
- DIE *IndexTyDie;
-
- /// MDNodeToDieMap - Tracks the mapping of unit level debug informaton
- /// variables to debug information entries.
- DenseMap<const MDNode *, DIE *> MDNodeToDieMap;
-
- /// MDNodeToDIEEntryMap - Tracks the mapping of unit level debug informaton
- /// descriptors to debug information entries using a DIEEntry proxy.
- DenseMap<const MDNode *, DIEEntry *> MDNodeToDIEEntryMap;
-
- /// Globals - A map of globally visible named entities for this unit.
- ///
- StringMap<DIE*> Globals;
-
- /// GlobalTypes - A map of globally visible types for this unit.
- ///
- StringMap<DIE*> GlobalTypes;
-
-public:
- CompileUnit(unsigned I, DIE *D)
- : ID(I), CUDie(D), IndexTyDie(0) {}
-
- // Accessors.
- unsigned getID() const { return ID; }
- DIE* getCUDie() const { return CUDie.get(); }
- const StringMap<DIE*> &getGlobals() const { return Globals; }
- const StringMap<DIE*> &getGlobalTypes() const { return GlobalTypes; }
-
- /// hasContent - Return true if this compile unit has something to write out.
- ///
- bool hasContent() const { return !CUDie->getChildren().empty(); }
-
- /// addGlobal - Add a new global entity to the compile unit.
- ///
- void addGlobal(StringRef Name, DIE *Die) { Globals[Name] = Die; }
-
- /// addGlobalType - Add a new global type to the compile unit.
- ///
- void addGlobalType(StringRef Name, DIE *Die) {
- GlobalTypes[Name] = Die;
- }
-
- /// getDIE - Returns the debug information entry map slot for the
- /// specified debug variable.
- DIE *getDIE(const MDNode *N) { return MDNodeToDieMap.lookup(N); }
-
- /// insertDIE - Insert DIE into the map.
- void insertDIE(const MDNode *N, DIE *D) {
- MDNodeToDieMap.insert(std::make_pair(N, D));
- }
-
- /// getDIEEntry - Returns the debug information entry for the speciefied
- /// debug variable.
- DIEEntry *getDIEEntry(const MDNode *N) {
- DenseMap<const MDNode *, DIEEntry *>::iterator I =
- MDNodeToDIEEntryMap.find(N);
- if (I == MDNodeToDIEEntryMap.end())
- return NULL;
- return I->second;
- }
-
- /// insertDIEEntry - Insert debug information entry into the map.
- void insertDIEEntry(const MDNode *N, DIEEntry *E) {
- MDNodeToDIEEntryMap.insert(std::make_pair(N, E));
- }
-
- /// addDie - Adds or interns the DIE to the compile unit.
- ///
- void addDie(DIE *Buffer) {
- this->CUDie->addChild(Buffer);
- }
-
- // getIndexTyDie - Get an anonymous type for index type.
- DIE *getIndexTyDie() {
- return IndexTyDie;
- }
-
- // setIndexTyDie - Set D as anonymous type for index which can be reused
- // later.
- void setIndexTyDie(DIE *D) {
- IndexTyDie = D;
- }
-
-};
-
-//===----------------------------------------------------------------------===//
-/// DbgVariable - This class is used to track local variable information.
-///
-class DbgVariable {
- DIVariable Var; // Variable Descriptor.
- DIE *TheDIE; // Variable DIE.
- unsigned DotDebugLocOffset; // Offset in DotDebugLocEntries.
-public:
- // AbsVar may be NULL.
- DbgVariable(DIVariable V) : Var(V), TheDIE(0), DotDebugLocOffset(~0U) {}
-
- // Accessors.
- DIVariable getVariable() const { return Var; }
- void setDIE(DIE *D) { TheDIE = D; }
- DIE *getDIE() const { return TheDIE; }
- void setDotDebugLocOffset(unsigned O) { DotDebugLocOffset = O; }
- unsigned getDotDebugLocOffset() const { return DotDebugLocOffset; }
- StringRef getName() const { return Var.getName(); }
- unsigned getTag() const { return Var.getTag(); }
- bool variableHasComplexAddress() const {
- assert(Var.Verify() && "Invalid complex DbgVariable!");
- return Var.hasComplexAddress();
- }
- bool isBlockByrefVariable() const {
- assert(Var.Verify() && "Invalid complex DbgVariable!");
- return Var.isBlockByrefVariable();
- }
- unsigned getNumAddrElements() const {
- assert(Var.Verify() && "Invalid complex DbgVariable!");
- return Var.getNumAddrElements();
- }
- uint64_t getAddrElement(unsigned i) const {
- return Var.getAddrElement(i);
- }
- DIType getType() const {
- DIType Ty = Var.getType();
- // FIXME: isBlockByrefVariable should be reformulated in terms of complex
- // addresses instead.
- if (Var.isBlockByrefVariable()) {
- /* 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. */
- DIType subType = Ty;
- unsigned tag = Ty.getTag();
-
- if (tag == dwarf::DW_TAG_pointer_type) {
- DIDerivedType DTy = DIDerivedType(Ty);
- subType = DTy.getTypeDerivedFrom();
- }
-
- DICompositeType blockStruct = DICompositeType(subType);
- DIArray Elements = blockStruct.getTypeArray();
-
- for (unsigned i = 0, N = Elements.getNumElements(); i < N; ++i) {
- DIDescriptor Element = Elements.getElement(i);
- DIDerivedType DT = DIDerivedType(Element);
- if (getName() == DT.getName())
- return (DT.getTypeDerivedFrom());
- }
- return Ty;
+DIType DbgVariable::getType() const {
+ DIType Ty = Var.getType();
+ // FIXME: isBlockByrefVariable should be reformulated in terms of complex
+ // addresses instead.
+ if (Var.isBlockByrefVariable()) {
+ /* 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. */
+ DIType subType = Ty;
+ unsigned tag = Ty.getTag();
+
+ if (tag == dwarf::DW_TAG_pointer_type) {
+ DIDerivedType DTy = DIDerivedType(Ty);
+ subType = DTy.getTypeDerivedFrom();
+ }
+
+ DICompositeType blockStruct = DICompositeType(subType);
+ DIArray Elements = blockStruct.getTypeArray();
+
+ for (unsigned i = 0, N = Elements.getNumElements(); i < N; ++i) {
+ DIDescriptor Element = Elements.getElement(i);
+ DIDerivedType DT = DIDerivedType(Element);
+ if (getName() == DT.getName())
+ return (DT.getTypeDerivedFrom());
}
- return Ty;
- }
-};
-
-//===----------------------------------------------------------------------===//
-/// DbgRange - This is used to track range of instructions with identical
-/// debug info scope.
-///
-typedef std::pair<const MachineInstr *, const MachineInstr *> DbgRange;
-
-//===----------------------------------------------------------------------===//
-/// DbgScope - This class is used to track scope information.
-///
-class DbgScope {
- DbgScope *Parent; // Parent to this scope.
- DIDescriptor Desc; // Debug info descriptor for scope.
- // Location at which this scope is inlined.
- AssertingVH<const MDNode> InlinedAtLocation;
- bool AbstractScope; // Abstract Scope
- const MachineInstr *LastInsn; // Last instruction of this scope.
- const MachineInstr *FirstInsn; // First instruction of this scope.
- unsigned DFSIn, DFSOut;
- // Scopes defined in scope. Contents not owned.
- SmallVector<DbgScope *, 4> Scopes;
- // Variables declared in scope. Contents owned.
- SmallVector<DbgVariable *, 8> Variables;
- SmallVector<DbgRange, 4> Ranges;
- // Private state for dump()
- mutable unsigned IndentLevel;
-public:
- DbgScope(DbgScope *P, DIDescriptor D, const MDNode *I = 0)
- : Parent(P), Desc(D), InlinedAtLocation(I), AbstractScope(false),
- LastInsn(0), FirstInsn(0),
- DFSIn(0), DFSOut(0), IndentLevel(0) {}
- virtual ~DbgScope();
-
- // Accessors.
- DbgScope *getParent() const { return Parent; }
- void setParent(DbgScope *P) { Parent = P; }
- DIDescriptor getDesc() const { return Desc; }
- const MDNode *getInlinedAt() const { return InlinedAtLocation; }
- const MDNode *getScopeNode() const { return Desc; }
- const SmallVector<DbgScope *, 4> &getScopes() { return Scopes; }
- const SmallVector<DbgVariable *, 8> &getDbgVariables() { return Variables; }
- const SmallVector<DbgRange, 4> &getRanges() { return Ranges; }
-
- /// openInsnRange - This scope covers instruction range starting from MI.
- void openInsnRange(const MachineInstr *MI) {
- if (!FirstInsn)
- FirstInsn = MI;
-
- if (Parent)
- Parent->openInsnRange(MI);
- }
-
- /// extendInsnRange - Extend the current instruction range covered by
- /// this scope.
- void extendInsnRange(const MachineInstr *MI) {
- assert (FirstInsn && "MI Range is not open!");
- LastInsn = MI;
- if (Parent)
- Parent->extendInsnRange(MI);
- }
-
- /// closeInsnRange - Create a range based on FirstInsn and LastInsn collected
- /// until now. This is used when a new scope is encountered while walking
- /// machine instructions.
- void closeInsnRange(DbgScope *NewScope = NULL) {
- assert (LastInsn && "Last insn missing!");
- Ranges.push_back(DbgRange(FirstInsn, LastInsn));
- FirstInsn = NULL;
- LastInsn = NULL;
- // If Parent dominates NewScope then do not close Parent's instruction
- // range.
- if (Parent && (!NewScope || !Parent->dominates(NewScope)))
- Parent->closeInsnRange(NewScope);
- }
-
- void setAbstractScope() { AbstractScope = true; }
- bool isAbstractScope() const { return AbstractScope; }
-
- // Depth First Search support to walk and mainpluate DbgScope hierarchy.
- unsigned getDFSOut() const { return DFSOut; }
- void setDFSOut(unsigned O) { DFSOut = O; }
- unsigned getDFSIn() const { return DFSIn; }
- void setDFSIn(unsigned I) { DFSIn = I; }
- bool dominates(const DbgScope *S) {
- if (S == this)
- return true;
- if (DFSIn < S->getDFSIn() && DFSOut > S->getDFSOut())
- return true;
- return false;
}
-
- /// addScope - Add a scope to the scope.
- ///
- void addScope(DbgScope *S) { Scopes.push_back(S); }
-
- /// addVariable - Add a variable to the scope.
- ///
- void addVariable(DbgVariable *V) { Variables.push_back(V); }
-
-#ifndef NDEBUG
- void dump() const;
-#endif
-};
-
-} // end llvm namespace
-
-#ifndef NDEBUG
-void DbgScope::dump() const {
- raw_ostream &err = dbgs();
- err.indent(IndentLevel);
- const MDNode *N = Desc;
- N->dump();
- if (AbstractScope)
- err << "Abstract Scope\n";
-
- IndentLevel += 2;
- if (!Scopes.empty())
- err << "Children ...\n";
- for (unsigned i = 0, e = Scopes.size(); i != e; ++i)
- if (Scopes[i] != this)
- Scopes[i]->dump();
-
- IndentLevel -= 2;
+ return Ty;
}
-#endif
-DbgScope::~DbgScope() {
- for (unsigned j = 0, M = Variables.size(); j < M; ++j)
- delete Variables[j];
-}
+} // end llvm namespace
DwarfDebug::DwarfDebug(AsmPrinter *A, Module *M)
: Asm(A), MMI(Asm->MMI), FirstCU(0),
AbbreviationsSet(InitAbbreviationsSetSize),
- CurrentFnDbgScope(0), PrevLabel(NULL) {
+ SourceIdMap(DIEValueAllocator), StringPool(DIEValueAllocator),
+ PrevLabel(NULL) {
NextStringPoolNumber = 0;
- DwarfFrameSectionSym = DwarfInfoSectionSym = DwarfAbbrevSectionSym = 0;
+ DwarfInfoSectionSym = DwarfAbbrevSectionSym = 0;
DwarfStrSectionSym = TextSectionSym = 0;
DwarfDebugRangeSectionSym = DwarfDebugLocSectionSym = 0;
FunctionBeginSym = FunctionEndSym = 0;
- DIEIntegerOne = new (DIEValueAllocator) DIEInteger(1);
+
+ // Turn on accelerator tables for Darwin.
+ if (Triple(M->getTargetTriple()).isOSDarwin())
+ DwarfAccelTables = true;
+
{
NamedRegionTimer T(DbgTimerName, DWARFGroupName, TimePassesIsEnabled);
beginModule(M);
}
}
DwarfDebug::~DwarfDebug() {
- for (unsigned j = 0, M = DIEBlocks.size(); j < M; ++j)
- DIEBlocks[j]->~DIEBlock();
+}
+
+/// EmitSectionSym - Switch to the specified MCSection and emit an assembler
+/// temporary label to it if SymbolStem is specified.
+static MCSymbol *EmitSectionSym(AsmPrinter *Asm, const MCSection *Section,
+ const char *SymbolStem = 0) {
+ Asm->OutStreamer.SwitchSection(Section);
+ if (!SymbolStem) return 0;
+
+ MCSymbol *TmpSym = Asm->GetTempSymbol(SymbolStem);
+ Asm->OutStreamer.EmitLabel(TmpSym);
+ return TmpSym;
+}
+
+MCSymbol *DwarfDebug::getStringPool() {
+ return Asm->GetTempSymbol("section_str");
}
MCSymbol *DwarfDebug::getStringPoolEntry(StringRef Str) {
return Entry.first = Asm->GetTempSymbol("string", Entry.second);
}
-
/// assignAbbrevNumber - Define a unique number for the abbreviation.
///
void DwarfDebug::assignAbbrevNumber(DIEAbbrev &Abbrev) {
}
}
-/// createDIEEntry - Creates a new DIEEntry to be a proxy for a debug
-/// information entry.
-DIEEntry *DwarfDebug::createDIEEntry(DIE *Entry) {
- DIEEntry *Value = new (DIEValueAllocator) DIEEntry(Entry);
- return Value;
-}
-
-/// addUInt - Add an unsigned integer attribute data and value.
-///
-void DwarfDebug::addUInt(DIE *Die, unsigned Attribute,
- unsigned Form, uint64_t Integer) {
- if (!Form) Form = DIEInteger::BestForm(false, Integer);
- DIEValue *Value = Integer == 1 ?
- DIEIntegerOne : new (DIEValueAllocator) DIEInteger(Integer);
- Die->addValue(Attribute, Form, Value);
-}
-
-/// addSInt - Add an signed integer attribute data and value.
-///
-void DwarfDebug::addSInt(DIE *Die, unsigned Attribute,
- unsigned Form, int64_t Integer) {
- if (!Form) Form = DIEInteger::BestForm(true, Integer);
- DIEValue *Value = new (DIEValueAllocator) DIEInteger(Integer);
- Die->addValue(Attribute, Form, Value);
-}
-
-/// addString - Add a string attribute data and value. DIEString only
-/// keeps string reference.
-void DwarfDebug::addString(DIE *Die, unsigned Attribute, unsigned Form,
- StringRef String) {
- DIEValue *Value = new (DIEValueAllocator) DIEString(String);
- Die->addValue(Attribute, Form, Value);
-}
-
-/// addLabel - Add a Dwarf label attribute data and value.
-///
-void DwarfDebug::addLabel(DIE *Die, unsigned Attribute, unsigned Form,
- const MCSymbol *Label) {
- DIEValue *Value = new (DIEValueAllocator) DIELabel(Label);
- Die->addValue(Attribute, Form, Value);
-}
-
-/// addDelta - Add a label delta attribute data and value.
-///
-void DwarfDebug::addDelta(DIE *Die, unsigned Attribute, unsigned Form,
- const MCSymbol *Hi, const MCSymbol *Lo) {
- DIEValue *Value = new (DIEValueAllocator) DIEDelta(Hi, Lo);
- Die->addValue(Attribute, Form, Value);
-}
-
-/// addDIEEntry - Add a DIE attribute data and value.
-///
-void DwarfDebug::addDIEEntry(DIE *Die, unsigned Attribute, unsigned Form,
- DIE *Entry) {
- Die->addValue(Attribute, Form, createDIEEntry(Entry));
-}
-
-
-/// addBlock - Add block data.
-///
-void DwarfDebug::addBlock(DIE *Die, unsigned Attribute, unsigned Form,
- DIEBlock *Block) {
- Block->ComputeSize(Asm);
- DIEBlocks.push_back(Block); // Memoize so we can call the destructor later on.
- Die->addValue(Attribute, Block->BestForm(), Block);
-}
-
-/// addSourceLine - Add location information to specified debug information
-/// entry.
-void DwarfDebug::addSourceLine(DIE *Die, DIVariable V) {
- // Verify variable.
- if (!V.Verify())
- return;
-
- unsigned Line = V.getLineNumber();
- if (Line == 0)
- return;
- unsigned FileID = GetOrCreateSourceID(V.getContext().getFilename());
- assert(FileID && "Invalid file id");
- addUInt(Die, dwarf::DW_AT_decl_file, 0, FileID);
- addUInt(Die, dwarf::DW_AT_decl_line, 0, Line);
-}
-
-/// addSourceLine - Add location information to specified debug information
-/// entry.
-void DwarfDebug::addSourceLine(DIE *Die, DIGlobalVariable G) {
- // Verify global variable.
- if (!G.Verify())
- return;
-
- unsigned Line = G.getLineNumber();
- if (Line == 0)
- return;
- unsigned FileID = GetOrCreateSourceID(G.getContext().getFilename());
- assert(FileID && "Invalid file id");
- addUInt(Die, dwarf::DW_AT_decl_file, 0, FileID);
- addUInt(Die, dwarf::DW_AT_decl_line, 0, Line);
-}
-
-/// addSourceLine - Add location information to specified debug information
-/// entry.
-void DwarfDebug::addSourceLine(DIE *Die, DISubprogram SP) {
- // Verify subprogram.
- if (!SP.Verify())
- return;
- // If the line number is 0, don't add it.
- if (SP.getLineNumber() == 0)
- return;
-
- unsigned Line = SP.getLineNumber();
- if (!SP.getContext().Verify())
- return;
- unsigned FileID = GetOrCreateSourceID(SP.getFilename());
- assert(FileID && "Invalid file id");
- addUInt(Die, dwarf::DW_AT_decl_file, 0, FileID);
- addUInt(Die, dwarf::DW_AT_decl_line, 0, Line);
-}
-
-/// addSourceLine - Add location information to specified debug information
-/// entry.
-void DwarfDebug::addSourceLine(DIE *Die, DIType Ty) {
- // Verify type.
- if (!Ty.Verify())
- return;
-
- unsigned Line = Ty.getLineNumber();
- if (Line == 0 || !Ty.getContext().Verify())
- return;
- unsigned FileID = GetOrCreateSourceID(Ty.getFilename());
- assert(FileID && "Invalid file id");
- addUInt(Die, dwarf::DW_AT_decl_file, 0, FileID);
- addUInt(Die, dwarf::DW_AT_decl_line, 0, Line);
-}
-
-/// addSourceLine - Add location information to specified debug information
-/// entry.
-void DwarfDebug::addSourceLine(DIE *Die, DINameSpace NS) {
- // Verify namespace.
- if (!NS.Verify())
- return;
-
- unsigned Line = NS.getLineNumber();
- if (Line == 0)
- return;
- StringRef FN = NS.getFilename();
-
- unsigned FileID = GetOrCreateSourceID(FN);
- assert(FileID && "Invalid file id");
- addUInt(Die, dwarf::DW_AT_decl_file, 0, FileID);
- addUInt(Die, dwarf::DW_AT_decl_line, 0, Line);
-}
-
-/// addVariableAddress - Add DW_AT_location attribute for a DbgVariable based
-/// on provided frame index.
-void DwarfDebug::addVariableAddress(DbgVariable *&DV, DIE *Die, int64_t FI) {
- MachineLocation Location;
- unsigned FrameReg;
- const TargetFrameLowering *TFI = Asm->TM.getFrameLowering();
- int Offset = TFI->getFrameIndexReference(*Asm->MF, FI, FrameReg);
- Location.set(FrameReg, Offset);
-
- if (DV->variableHasComplexAddress())
- addComplexAddress(DV, Die, dwarf::DW_AT_location, Location);
- else if (DV->isBlockByrefVariable())
- addBlockByrefAddress(DV, Die, dwarf::DW_AT_location, Location);
- else
- addAddress(Die, dwarf::DW_AT_location, Location);
-}
-
-/// 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) {
- DIType Ty = DV->getType();
-
- // Decode the original location, and use that as the start of the byref
- // variable's location.
- const TargetRegisterInfo *RI = Asm->TM.getRegisterInfo();
- unsigned Reg = RI->getDwarfRegNum(Location.getReg(), false);
- DIEBlock *Block = new (DIEValueAllocator) 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());
- }
-
- for (unsigned i = 0, N = DV->getNumAddrElements(); i < N; ++i) {
- uint64_t Element = DV->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, DV->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) {
- DIType Ty = DV->getType();
- DIType TmpTy = Ty;
- unsigned Tag = Ty.getTag();
- bool isPointer = false;
-
- StringRef varName = DV->getName();
-
- if (Tag == dwarf::DW_TAG_pointer_type) {
- DIDerivedType DTy = DIDerivedType(Ty);
- TmpTy = DTy.getTypeDerivedFrom();
- isPointer = true;
- }
-
- DICompositeType blockStruct = DICompositeType(TmpTy);
-
- // 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);
- StringRef fieldName = DT.getName();
- if (fieldName == "__forwarding")
- forwardingField = Element;
- else if (fieldName == varName)
- varField = Element;
- }
-
- // Get the offsets for the forwarding field and the variable field.
- unsigned forwardingFieldOffset =
- DIDerivedType(forwardingField).getOffsetInBits() >> 3;
- unsigned varFieldOffset =
- DIDerivedType(varField).getOffsetInBits() >> 3;
-
- // Decode the original location, and use that as the start of the byref
- // variable's location.
- const TargetRegisterInfo *RI = Asm->TM.getRegisterInfo();
- unsigned Reg = RI->getDwarfRegNum(Location.getReg(), false);
- DIEBlock *Block = new (DIEValueAllocator) 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());
- }
-
- // 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) {
- const TargetRegisterInfo *RI = Asm->TM.getRegisterInfo();
- unsigned Reg = RI->getDwarfRegNum(Location.getReg(), false);
- DIEBlock *Block = new (DIEValueAllocator) DIEBlock();
-
- if (RI->getFrameRegister(*Asm->MF) == Location.getReg()
- && Location.getOffset()) {
- // If variable offset is based in frame register then use fbreg.
- addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_fbreg);
- addSInt(Block, 0, dwarf::DW_FORM_sdata, Location.getOffset());
- addBlock(Die, Attribute, 0, Block);
- return;
- }
-
- 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);
-}
-
-/// addRegisterAddress - Add register location entry in variable DIE.
-bool DwarfDebug::addRegisterAddress(DIE *Die, const MachineOperand &MO) {
- assert (MO.isReg() && "Invalid machine operand!");
- if (!MO.getReg())
- return false;
- MachineLocation Location;
- Location.set(MO.getReg());
- addAddress(Die, dwarf::DW_AT_location, Location);
- return true;
-}
-
-/// addConstantValue - Add constant value entry in variable DIE.
-bool DwarfDebug::addConstantValue(DIE *Die, const MachineOperand &MO) {
- assert (MO.isImm() && "Invalid machine operand!");
- DIEBlock *Block = new (DIEValueAllocator) DIEBlock();
- unsigned Imm = MO.getImm();
- addUInt(Block, 0, dwarf::DW_FORM_udata, Imm);
- addBlock(Die, dwarf::DW_AT_const_value, 0, Block);
- return true;
-}
-
-/// addConstantFPValue - Add constant value entry in variable DIE.
-bool DwarfDebug::addConstantFPValue(DIE *Die, const MachineOperand &MO) {
- assert (MO.isFPImm() && "Invalid machine operand!");
- DIEBlock *Block = new (DIEValueAllocator) DIEBlock();
- APFloat FPImm = MO.getFPImm()->getValueAPF();
-
- // Get the raw data form of the floating point.
- const APInt FltVal = FPImm.bitcastToAPInt();
- const char *FltPtr = (const char*)FltVal.getRawData();
-
- int NumBytes = FltVal.getBitWidth() / 8; // 8 bits per byte.
- bool LittleEndian = Asm->getTargetData().isLittleEndian();
- int Incr = (LittleEndian ? 1 : -1);
- int Start = (LittleEndian ? 0 : NumBytes - 1);
- int Stop = (LittleEndian ? NumBytes : -1);
-
- // Output the constant to DWARF one byte at a time.
- for (; Start != Stop; Start += Incr)
- addUInt(Block, 0, dwarf::DW_FORM_data1,
- (unsigned char)0xFF & FltPtr[Start]);
-
- addBlock(Die, dwarf::DW_AT_const_value, 0, Block);
- return true;
-}
-
-/// addConstantValue - Add constant value entry in variable DIE.
-bool DwarfDebug::addConstantValue(DIE *Die, ConstantInt *CI,
- bool Unsigned) {
- if (CI->getBitWidth() <= 64) {
- if (Unsigned)
- addUInt(Die, dwarf::DW_AT_const_value, dwarf::DW_FORM_udata,
- CI->getZExtValue());
- else
- addSInt(Die, dwarf::DW_AT_const_value, dwarf::DW_FORM_sdata,
- CI->getSExtValue());
- return true;
- }
-
- DIEBlock *Block = new (DIEValueAllocator) DIEBlock();
-
- // Get the raw data form of the large APInt.
- const APInt Val = CI->getValue();
- const char *Ptr = (const char*)Val.getRawData();
-
- int NumBytes = Val.getBitWidth() / 8; // 8 bits per byte.
- bool LittleEndian = Asm->getTargetData().isLittleEndian();
- int Incr = (LittleEndian ? 1 : -1);
- int Start = (LittleEndian ? 0 : NumBytes - 1);
- int Stop = (LittleEndian ? NumBytes : -1);
-
- // Output the constant to DWARF one byte at a time.
- for (; Start != Stop; Start += Incr)
- addUInt(Block, 0, dwarf::DW_FORM_data1,
- (unsigned char)0xFF & Ptr[Start]);
-
- addBlock(Die, dwarf::DW_AT_const_value, 0, Block);
- return true;
-}
-
-/// addToContextOwner - Add Die into the list of its context owner's children.
-void DwarfDebug::addToContextOwner(DIE *Die, DIDescriptor Context) {
- if (Context.isType()) {
- DIE *ContextDIE = getOrCreateTypeDIE(DIType(Context));
- ContextDIE->addChild(Die);
- } else if (Context.isNameSpace()) {
- DIE *ContextDIE = getOrCreateNameSpace(DINameSpace(Context));
- ContextDIE->addChild(Die);
- } else if (Context.isSubprogram()) {
- DIE *ContextDIE = createSubprogramDIE(DISubprogram(Context));
- ContextDIE->addChild(Die);
- } else if (DIE *ContextDIE = getCompileUnit(Context)->getDIE(Context))
- ContextDIE->addChild(Die);
- else
- getCompileUnit(Context)->addDie(Die);
-}
-
-/// getOrCreateTypeDIE - Find existing DIE or create new DIE for the
-/// given DIType.
-DIE *DwarfDebug::getOrCreateTypeDIE(DIType Ty) {
- CompileUnit *TypeCU = getCompileUnit(Ty);
- DIE *TyDIE = TypeCU->getDIE(Ty);
- if (TyDIE)
- return TyDIE;
-
- // Create new type.
- TyDIE = new DIE(dwarf::DW_TAG_base_type);
- TypeCU->insertDIE(Ty, TyDIE);
- if (Ty.isBasicType())
- constructTypeDIE(*TyDIE, DIBasicType(Ty));
- else if (Ty.isCompositeType())
- constructTypeDIE(*TyDIE, DICompositeType(Ty));
- else {
- assert(Ty.isDerivedType() && "Unknown kind of DIType");
- constructTypeDIE(*TyDIE, DIDerivedType(Ty));
- }
-
- 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.Verify())
- return;
-
- // Check for pre-existence.
- CompileUnit *TypeCU = getCompileUnit(Ty);
- DIEEntry *Entry = TypeCU->getDIEEntry(Ty);
- // If it exists then use the existing value.
- if (Entry) {
- Entity->addValue(dwarf::DW_AT_type, dwarf::DW_FORM_ref4, Entry);
- return;
- }
-
- // Construct type.
- DIE *Buffer = getOrCreateTypeDIE(Ty);
-
- // Set up proxy.
- Entry = createDIEEntry(Buffer);
- TypeCU->insertDIEEntry(Ty, Entry);
-
- 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;
- DIDescriptor Enum(Elements.getElement(i));
- if (Enum.isEnumerator()) {
- ElemDie = constructEnumTypeDIE(DIEnumerator(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));
-
- bool isPrototyped = true;
- // Add arguments.
- for (unsigned i = 1, N = Elements.getNumElements(); i < N; ++i) {
- DIDescriptor Ty = Elements.getElement(i);
- if (Ty.isUnspecifiedParameter()) {
- DIE *Arg = new DIE(dwarf::DW_TAG_unspecified_parameters);
- Buffer.addChild(Arg);
- isPrototyped = false;
- } else {
- DIE *Arg = new DIE(dwarf::DW_TAG_formal_parameter);
- addType(Arg, DIType(Ty));
- Buffer.addChild(Arg);
- }
- }
- // Add prototype flag.
- if (isPrototyped)
- addUInt(&Buffer, dwarf::DW_AT_prototyped, dwarf::DW_FORM_flag, 1);
- }
- 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.
- unsigned N = Elements.getNumElements();
- if (N == 0)
- break;
-
- // Add elements to structure type.
- for (unsigned i = 0; i < N; ++i) {
- DIDescriptor Element = Elements.getElement(i);
- DIE *ElemDie = NULL;
- if (Element.isSubprogram()) {
- DISubprogram SP(Element);
- ElemDie = createSubprogramDIE(DISubprogram(Element));
- if (SP.isProtected())
- addUInt(ElemDie, dwarf::DW_AT_accessibility, dwarf::DW_FORM_flag,
- dwarf::DW_ACCESS_protected);
- else if (SP.isPrivate())
- addUInt(ElemDie, dwarf::DW_AT_accessibility, dwarf::DW_FORM_flag,
- dwarf::DW_ACCESS_private);
- else
- addUInt(ElemDie, dwarf::DW_AT_accessibility, dwarf::DW_FORM_flag,
- dwarf::DW_ACCESS_public);
- if (SP.isExplicit())
- addUInt(ElemDie, dwarf::DW_AT_explicit, dwarf::DW_FORM_flag, 1);
- }
- else if (Element.isVariable()) {
- DIVariable DV(Element);
- 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 if (Element.isDerivedType())
- ElemDie = createMemberDIE(DIDerivedType(Element));
- else
- continue;
- 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 (DIDescriptor(ContainingType).isCompositeType())
- addDIEEntry(&Buffer, dwarf::DW_AT_containing_type, dwarf::DW_FORM_ref4,
- getOrCreateTypeDIE(DIType(ContainingType)));
- else {
- DIDescriptor Context = CTy.getContext();
- addToContextOwner(&Buffer, Context);
- }
-
- if (Tag == dwarf::DW_TAG_class_type) {
- DIArray TParams = CTy.getTemplateParams();
- unsigned N = TParams.getNumElements();
- // Add template parameters.
- for (unsigned i = 0; i < N; ++i) {
- DIDescriptor Element = TParams.getElement(i);
- if (Element.isTemplateTypeParameter())
- Buffer.addChild(getOrCreateTemplateTypeParameterDIE(
- DITemplateTypeParameter(Element)));
- else if (Element.isTemplateValueParameter())
- Buffer.addChild(getOrCreateTemplateValueParameterDIE(
- DITemplateValueParameter(Element)));
- }
- }
- 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);
- }
-}
-
-/// getOrCreateTemplateTypeParameterDIE - Find existing DIE or create new DIE
-/// for the given DITemplateTypeParameter.
-DIE *
-DwarfDebug::getOrCreateTemplateTypeParameterDIE(DITemplateTypeParameter TP) {
- CompileUnit *TypeCU = getCompileUnit(TP);
- DIE *ParamDIE = TypeCU->getDIE(TP);
- if (ParamDIE)
- return ParamDIE;
-
- ParamDIE = new DIE(dwarf::DW_TAG_template_type_parameter);
- addType(ParamDIE, TP.getType());
- addString(ParamDIE, dwarf::DW_AT_name, dwarf::DW_FORM_string, TP.getName());
- return ParamDIE;
-}
-
-/// getOrCreateTemplateValueParameterDIE - Find existing DIE or create new DIE
-/// for the given DITemplateValueParameter.
-DIE *
-DwarfDebug::getOrCreateTemplateValueParameterDIE(DITemplateValueParameter TPV) {
- CompileUnit *TVCU = getCompileUnit(TPV);
- DIE *ParamDIE = TVCU->getDIE(TPV);
- if (ParamDIE)
- return ParamDIE;
-
- ParamDIE = new DIE(dwarf::DW_TAG_template_value_parameter);
- addType(ParamDIE, TPV.getType());
- addString(ParamDIE, dwarf::DW_AT_name, dwarf::DW_FORM_string, TPV.getName());
- addUInt(ParamDIE, dwarf::DW_AT_const_value, dwarf::DW_FORM_udata,
- TPV.getValue());
- return ParamDIE;
-}
-
-/// 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.
- CompileUnit *TheCU = getCompileUnit(*CTy);
- DIE *IdxTy = TheCU->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);
- TheCU->addDie(IdxTy);
- TheCU->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), 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.
return LinkageName;
}
-/// createMemberDIE - Create new member DIE.
-DIE *DwarfDebug::createMemberDIE(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 (DIEValueAllocator) 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 (Asm->getTargetData().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 (DIEValueAllocator) 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);
- // Otherwise C++ member and base classes are considered public.
- else if (DT.getCompileUnit().getLanguage() == dwarf::DW_LANG_C_plus_plus)
- 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;
+static bool isObjCClass(StringRef Name) {
+ return Name.startswith("+") || Name.startswith("-");
}
-/// createSubprogramDIE - Create new DIE using SP.
-DIE *DwarfDebug::createSubprogramDIE(DISubprogram SP) {
- CompileUnit *SPCU = getCompileUnit(SP);
- DIE *SPDie = SPCU->getDIE(SP);
- if (SPDie)
- return SPDie;
+static bool hasObjCCategory(StringRef Name) {
+ if (!isObjCClass(Name)) return false;
- 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);
-
- if (SP.isPrototyped())
- 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.getNumElements() == 0 || SPTag != dwarf::DW_TAG_subroutine_type)
- addType(SPDie, SPTy);
- else
- addType(SPDie, DIType(Args.getElement(0)));
-
- unsigned VK = SP.getVirtuality();
- if (VK) {
- addUInt(SPDie, dwarf::DW_AT_virtuality, dwarf::DW_FORM_flag, VK);
- DIEBlock *Block = new (DIEValueAllocator) DIEBlock();
- addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_constu);
- addUInt(Block, 0, dwarf::DW_FORM_udata, SP.getVirtualIndex());
- addBlock(SPDie, dwarf::DW_AT_vtable_elem_location, 0, Block);
- ContainingTypeMap.insert(std::make_pair(SPDie,
- SP.getContainingType()));
- }
-
- if (!SP.isDefinition()) {
- addUInt(SPDie, dwarf::DW_AT_declaration, dwarf::DW_FORM_flag, 1);
-
- // Add arguments. Do not add arguments for subprogram definition. They will
- // be handled 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)));
- addType(Arg, ATy);
- if (ATy.isArtificial())
- addUInt(Arg, dwarf::DW_AT_artificial, dwarf::DW_FORM_flag, 1);
- SPDie->addChild(Arg);
- }
+ size_t pos = Name.find(')');
+ if (pos != std::string::npos) {
+ if (Name[pos+1] != ' ') return false;
+ return true;
}
+ return false;
+}
- if (SP.isArtificial())
- addUInt(SPDie, dwarf::DW_AT_artificial, dwarf::DW_FORM_flag, 1);
-
- if (!SP.isLocalToUnit())
- addUInt(SPDie, dwarf::DW_AT_external, dwarf::DW_FORM_flag, 1);
-
- if (SP.isOptimized())
- addUInt(SPDie, dwarf::DW_AT_APPLE_optimized, dwarf::DW_FORM_flag, 1);
-
- if (unsigned isa = Asm->getISAEncoding()) {
- addUInt(SPDie, dwarf::DW_AT_APPLE_isa, dwarf::DW_FORM_flag, isa);
+static void getObjCClassCategory(StringRef In, StringRef &Class,
+ StringRef &Category) {
+ if (!hasObjCCategory(In)) {
+ Class = In.slice(In.find('[') + 1, In.find(' '));
+ Category = "";
+ return;
}
- // DW_TAG_inlined_subroutine may refer to this DIE.
- SPCU->insertDIE(SP, SPDie);
-
- // Add to context owner.
- addToContextOwner(SPDie, SP.getContext());
-
- return SPDie;
+ Class = In.slice(In.find('[') + 1, In.find('('));
+ Category = In.slice(In.find('[') + 1, In.find(' '));
+ return;
}
-DbgScope *DwarfDebug::getOrCreateAbstractScope(const MDNode *N) {
- assert(N && "Invalid Scope encoding!");
+static StringRef getObjCMethodName(StringRef In) {
+ return In.slice(In.find(' ') + 1, In.find(']'));
+}
- DbgScope *AScope = AbstractScopes.lookup(N);
- if (AScope)
- return AScope;
+// Add the various names to the Dwarf accelerator table names.
+static void addSubprogramNames(CompileUnit *TheCU, DISubprogram SP,
+ DIE* Die) {
+ if (!SP.isDefinition()) return;
+
+ TheCU->addAccelName(SP.getName(), Die);
- DbgScope *Parent = NULL;
+ // If the linkage name is different than the name, go ahead and output
+ // that as well into the name table.
+ if (SP.getLinkageName() != "" && SP.getName() != SP.getLinkageName())
+ TheCU->addAccelName(SP.getLinkageName(), Die);
- DIDescriptor Scope(N);
- if (Scope.isLexicalBlock()) {
- DILexicalBlock DB(N);
- DIDescriptor ParentDesc = DB.getContext();
- Parent = getOrCreateAbstractScope(ParentDesc);
+ // If this is an Objective-C selector name add it to the ObjC accelerator
+ // too.
+ if (isObjCClass(SP.getName())) {
+ StringRef Class, Category;
+ getObjCClassCategory(SP.getName(), Class, Category);
+ TheCU->addAccelObjC(Class, Die);
+ if (Category != "")
+ TheCU->addAccelObjC(Category, Die);
+ // Also add the base method name to the name table.
+ TheCU->addAccelName(getObjCMethodName(SP.getName()), Die);
}
-
- 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;
-}
-
-/// isSubprogramContext - Return true if Context is either a subprogram
-/// or another context nested inside a subprogram.
-static bool isSubprogramContext(const MDNode *Context) {
- if (!Context)
- return false;
- DIDescriptor D(Context);
- if (D.isSubprogram())
- return true;
- if (D.isType())
- return isSubprogramContext(DIType(Context).getContext());
- return false;
}
/// 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(const MDNode *SPNode) {
- CompileUnit *SPCU = getCompileUnit(SPNode);
+DIE *DwarfDebug::updateSubprogramScopeDIE(CompileUnit *SPCU,
+ const MDNode *SPNode) {
DIE *SPDie = SPCU->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().isFile() &&
- !isSubprogramContext(SP.getContext())) {
- 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)));
- 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);
- SPCU->addDie(SPDie);
+ DISubprogram SPDecl = SP.getFunctionDeclaration();
+ if (!SPDecl.isSubprogram()) {
+ // 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().isFile() &&
+ !isSubprogramContext(SP.getContext())) {
+ SPCU->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)));
+ SPCU->addType(Arg, ATy);
+ if (ATy.isArtificial())
+ SPCU->addUInt(Arg, dwarf::DW_AT_artificial, dwarf::DW_FORM_flag, 1);
+ SPDie->addChild(Arg);
+ }
+ DIE *SPDeclDie = SPDie;
+ SPDie = new DIE(dwarf::DW_TAG_subprogram);
+ SPCU->addDIEEntry(SPDie, dwarf::DW_AT_specification, dwarf::DW_FORM_ref4,
+ SPDeclDie);
+ SPCU->addDie(SPDie);
+ }
}
-
// Pick up abstract subprogram DIE.
if (DIE *AbsSPDIE = AbstractSPDies.lookup(SPNode)) {
SPDie = new DIE(dwarf::DW_TAG_subprogram);
- addDIEEntry(SPDie, dwarf::DW_AT_abstract_origin,
- dwarf::DW_FORM_ref4, AbsSPDIE);
+ SPCU->addDIEEntry(SPDie, dwarf::DW_AT_abstract_origin,
+ dwarf::DW_FORM_ref4, AbsSPDIE);
SPCU->addDie(SPDie);
}
- addLabel(SPDie, dwarf::DW_AT_low_pc, dwarf::DW_FORM_addr,
- Asm->GetTempSymbol("func_begin", Asm->getFunctionNumber()));
- addLabel(SPDie, dwarf::DW_AT_high_pc, dwarf::DW_FORM_addr,
- Asm->GetTempSymbol("func_end", Asm->getFunctionNumber()));
+ SPCU->addLabel(SPDie, dwarf::DW_AT_low_pc, dwarf::DW_FORM_addr,
+ Asm->GetTempSymbol("func_begin", Asm->getFunctionNumber()));
+ SPCU->addLabel(SPDie, dwarf::DW_AT_high_pc, dwarf::DW_FORM_addr,
+ Asm->GetTempSymbol("func_end", Asm->getFunctionNumber()));
const TargetRegisterInfo *RI = Asm->TM.getRegisterInfo();
MachineLocation Location(RI->getFrameRegister(*Asm->MF));
- addAddress(SPDie, dwarf::DW_AT_frame_base, Location);
+ SPCU->addAddress(SPDie, dwarf::DW_AT_frame_base, Location);
+ // Add name to the name table, we do this here because we're guaranteed
+ // to have concrete versions of our DW_TAG_subprogram nodes.
+ addSubprogramNames(SPCU, SP, SPDie);
+
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) {
-
+DIE *DwarfDebug::constructLexicalScopeDIE(CompileUnit *TheCU,
+ LexicalScope *Scope) {
DIE *ScopeDIE = new DIE(dwarf::DW_TAG_lexical_block);
if (Scope->isAbstractScope())
return ScopeDIE;
- const SmallVector<DbgRange, 4> &Ranges = Scope->getRanges();
+ const SmallVector<InsnRange, 4> &Ranges = Scope->getRanges();
if (Ranges.empty())
return 0;
- SmallVector<DbgRange, 4>::const_iterator RI = Ranges.begin();
+ SmallVector<InsnRange, 4>::const_iterator RI = Ranges.begin();
if (Ranges.size() > 1) {
// .debug_range section has not been laid out yet. Emit offset in
// .debug_range as a uint, size 4, for now. emitDIE will handle
// DW_AT_ranges appropriately.
- addUInt(ScopeDIE, dwarf::DW_AT_ranges, dwarf::DW_FORM_data4,
- DebugRangeSymbols.size() * Asm->getTargetData().getPointerSize());
- for (SmallVector<DbgRange, 4>::const_iterator RI = Ranges.begin(),
+ TheCU->addUInt(ScopeDIE, dwarf::DW_AT_ranges, dwarf::DW_FORM_data4,
+ DebugRangeSymbols.size()
+ * Asm->getTargetData().getPointerSize());
+ for (SmallVector<InsnRange, 4>::const_iterator RI = Ranges.begin(),
RE = Ranges.end(); RI != RE; ++RI) {
DebugRangeSymbols.push_back(getLabelBeforeInsn(RI->first));
DebugRangeSymbols.push_back(getLabelAfterInsn(RI->second));
assert(Start->isDefined() && "Invalid starting label for an inlined scope!");
assert(End->isDefined() && "Invalid end label for an inlined scope!");
- addLabel(ScopeDIE, dwarf::DW_AT_low_pc, dwarf::DW_FORM_addr, Start);
- addLabel(ScopeDIE, dwarf::DW_AT_high_pc, dwarf::DW_FORM_addr, End);
+ TheCU->addLabel(ScopeDIE, dwarf::DW_AT_low_pc, dwarf::DW_FORM_addr, Start);
+ TheCU->addLabel(ScopeDIE, dwarf::DW_AT_high_pc, dwarf::DW_FORM_addr, End);
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) {
+DIE *DwarfDebug::constructInlinedScopeDIE(CompileUnit *TheCU,
+ LexicalScope *Scope) {
+ const SmallVector<InsnRange, 4> &Ranges = Scope->getRanges();
+ assert(Ranges.empty() == false &&
+ "LexicalScope does not have instruction markers!");
- const SmallVector<DbgRange, 4> &Ranges = Scope->getRanges();
- assert (Ranges.empty() == false
- && "DbgScope does not have instruction markers!");
+ if (!Scope->getScopeNode())
+ return NULL;
+ DIScope DS(Scope->getScopeNode());
+ DISubprogram InlinedSP = getDISubprogram(DS);
+ DIE *OriginDIE = TheCU->getDIE(InlinedSP);
+ if (!OriginDIE) {
+ DEBUG(dbgs() << "Unable to find original DIE for inlined subprogram.");
+ return NULL;
+ }
- // FIXME : .debug_inlined section specification does not clearly state how
- // to emit inlined scope that is split into multiple instruction ranges.
- // For now, use first instruction range and emit low_pc/high_pc pair and
- // corresponding .debug_inlined section entry for this pair.
- SmallVector<DbgRange, 4>::const_iterator RI = Ranges.begin();
+ SmallVector<InsnRange, 4>::const_iterator RI = Ranges.begin();
const MCSymbol *StartLabel = getLabelBeforeInsn(RI->first);
const MCSymbol *EndLabel = getLabelAfterInsn(RI->second);
if (StartLabel == 0 || EndLabel == 0) {
- assert (0 && "Unexpected Start and End labels for a inlined scope!");
- return 0;
+ llvm_unreachable("Unexpected Start and End labels for a inlined scope!");
}
assert(StartLabel->isDefined() &&
"Invalid starting label for an inlined scope!");
assert(EndLabel->isDefined() &&
"Invalid end label for an inlined scope!");
- if (!Scope->getScopeNode())
- return NULL;
- DIScope DS(Scope->getScopeNode());
DIE *ScopeDIE = new DIE(dwarf::DW_TAG_inlined_subroutine);
+ TheCU->addDIEEntry(ScopeDIE, dwarf::DW_AT_abstract_origin,
+ dwarf::DW_FORM_ref4, OriginDIE);
- DISubprogram InlinedSP = getDISubprogram(DS);
- CompileUnit *TheCU = getCompileUnit(InlinedSP);
- DIE *OriginDIE = TheCU->getDIE(InlinedSP);
- 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, StartLabel);
- addLabel(ScopeDIE, dwarf::DW_AT_high_pc, dwarf::DW_FORM_addr, EndLabel);
+ if (Ranges.size() > 1) {
+ // .debug_range section has not been laid out yet. Emit offset in
+ // .debug_range as a uint, size 4, for now. emitDIE will handle
+ // DW_AT_ranges appropriately.
+ TheCU->addUInt(ScopeDIE, dwarf::DW_AT_ranges, dwarf::DW_FORM_data4,
+ DebugRangeSymbols.size()
+ * Asm->getTargetData().getPointerSize());
+ for (SmallVector<InsnRange, 4>::const_iterator RI = Ranges.begin(),
+ RE = Ranges.end(); RI != RE; ++RI) {
+ DebugRangeSymbols.push_back(getLabelBeforeInsn(RI->first));
+ DebugRangeSymbols.push_back(getLabelAfterInsn(RI->second));
+ }
+ DebugRangeSymbols.push_back(NULL);
+ DebugRangeSymbols.push_back(NULL);
+ } else {
+ TheCU->addLabel(ScopeDIE, dwarf::DW_AT_low_pc, dwarf::DW_FORM_addr,
+ StartLabel);
+ TheCU->addLabel(ScopeDIE, dwarf::DW_AT_high_pc, dwarf::DW_FORM_addr,
+ EndLabel);
+ }
InlinedSubprogramDIEs.insert(OriginDIE);
// Track the start label for this inlined function.
+ //.debug_inlined section specification does not clearly state how
+ // to emit inlined scope that is split into multiple instruction ranges.
+ // For now, use first instruction range and emit low_pc/high_pc pair and
+ // corresponding .debug_inlined section entry for this pair.
DenseMap<const MDNode *, SmallVector<InlineInfoLabels, 4> >::iterator
I = InlineInfo.find(InlinedSP);
if (I == InlineInfo.end()) {
- InlineInfo[InlinedSP].push_back(std::make_pair(StartLabel,
- ScopeDIE));
+ InlineInfo[InlinedSP].push_back(std::make_pair(StartLabel, ScopeDIE));
InlinedSPNodes.push_back(InlinedSP);
} else
I->second.push_back(std::make_pair(StartLabel, ScopeDIE));
DILocation DL(Scope->getInlinedAt());
- addUInt(ScopeDIE, dwarf::DW_AT_call_file, 0, TheCU->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) {
- StringRef Name = DV->getName();
- if (Name.empty())
- return NULL;
-
- // Translate tag to proper Dwarf tag. The result variable is dropped for
- // now.
- unsigned Tag;
- switch (DV->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;
- DenseMap<const DbgVariable *, const DbgVariable *>::iterator
- V2AVI = VarToAbstractVarMap.find(DV);
- if (V2AVI != VarToAbstractVarMap.end())
- AbsDIE = V2AVI->second->getDIE();
-
- if (AbsDIE)
- 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, DV->getVariable());
-
- // Add variable type.
- addType(VariableDie, DV->getType());
- }
-
- if (Tag == dwarf::DW_TAG_formal_parameter && DV->getType().isArtificial())
- addUInt(VariableDie, dwarf::DW_AT_artificial, dwarf::DW_FORM_flag, 1);
- else if (DIVariable(DV->getVariable()).isArtificial())
- addUInt(VariableDie, dwarf::DW_AT_artificial, dwarf::DW_FORM_flag, 1);
-
- if (Scope->isAbstractScope()) {
- DV->setDIE(VariableDie);
- return VariableDie;
- }
-
- // Add variable address.
-
- unsigned Offset = DV->getDotDebugLocOffset();
- if (Offset != ~0U) {
- addLabel(VariableDie, dwarf::DW_AT_location, dwarf::DW_FORM_data4,
- Asm->GetTempSymbol("debug_loc", Offset));
- DV->setDIE(VariableDie);
- UseDotDebugLocEntry.insert(VariableDie);
- return VariableDie;
- }
-
- // Check if variable is described by a DBG_VALUE instruction.
- DenseMap<const DbgVariable *, const MachineInstr *>::iterator DVI =
- DbgVariableToDbgInstMap.find(DV);
- if (DVI != DbgVariableToDbgInstMap.end()) {
- const MachineInstr *DVInsn = DVI->second;
- bool updated = false;
- // FIXME : Handle getNumOperands != 3
- if (DVInsn->getNumOperands() == 3) {
- if (DVInsn->getOperand(0).isReg()) {
- const MachineOperand RegOp = DVInsn->getOperand(0);
- const TargetRegisterInfo *TRI = Asm->TM.getRegisterInfo();
- if (DVInsn->getOperand(1).isImm() &&
- TRI->getFrameRegister(*Asm->MF) == RegOp.getReg()) {
- addVariableAddress(DV, VariableDie, DVInsn->getOperand(1).getImm());
- updated = true;
- } else
- updated = addRegisterAddress(VariableDie, RegOp);
- }
- else if (DVInsn->getOperand(0).isImm())
- updated = addConstantValue(VariableDie, DVInsn->getOperand(0));
- else if (DVInsn->getOperand(0).isFPImm())
- updated =
- addConstantFPValue(VariableDie, DVInsn->getOperand(0));
- } else {
- MachineLocation Location = Asm->getDebugValueLocation(DVInsn);
- if (Location.getReg()) {
- addAddress(VariableDie, dwarf::DW_AT_location, Location);
- updated = true;
- }
- }
- if (!updated) {
- // If variableDie is not updated then DBG_VALUE instruction does not
- // have valid variable info.
- delete VariableDie;
- return NULL;
- }
- DV->setDIE(VariableDie);
- return VariableDie;
- }
+ TheCU->addUInt(ScopeDIE, dwarf::DW_AT_call_file, 0,
+ GetOrCreateSourceID(DL.getFilename(), DL.getDirectory()));
+ TheCU->addUInt(ScopeDIE, dwarf::DW_AT_call_line, 0, DL.getLineNumber());
- // .. else use frame index, if available.
- int FI = 0;
- if (findVariableFrameIndex(DV, &FI))
- addVariableAddress(DV, VariableDie, FI);
+ // Add name to the name table, we do this here because we're guaranteed
+ // to have concrete versions of our DW_TAG_inlined_subprogram nodes.
+ addSubprogramNames(TheCU, InlinedSP, ScopeDIE);
- 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();
- for (unsigned i = 0, e = Args.getNumElements(); i != e; ++i) {
- DIType ATy(Args.getElement(i));
- if (!ATy.Verify())
- continue;
- DICompositeType CATy = getDICompositeType(ATy);
- if (DIDescriptor(CATy).Verify() && !CATy.getName().empty()
- && !CATy.isForwardDecl()) {
- CompileUnit *TheCU = getCompileUnit(CATy);
- if (DIEEntry *Entry = TheCU->getDIEEntry(CATy))
- TheCU->addGlobalType(CATy.getName(), Entry->getEntry());
- }
- }
+ return ScopeDIE;
}
/// constructScopeDIE - Construct a DIE for this scope.
-DIE *DwarfDebug::constructScopeDIE(DbgScope *Scope) {
+DIE *DwarfDebug::constructScopeDIE(CompileUnit *TheCU, LexicalScope *Scope) {
if (!Scope || !Scope->getScopeNode())
return NULL;
+ SmallVector<DIE *, 8> Children;
+
+ // Collect arguments for current function.
+ if (LScopes.isCurrentFunctionScope(Scope))
+ for (unsigned i = 0, N = CurrentFnArguments.size(); i < N; ++i)
+ if (DbgVariable *ArgDV = CurrentFnArguments[i])
+ if (DIE *Arg =
+ TheCU->constructVariableDIE(ArgDV, Scope->isAbstractScope()))
+ Children.push_back(Arg);
+
+ // Collect lexical scope children first.
+ const SmallVector<DbgVariable *, 8> &Variables = ScopeVariables.lookup(Scope);
+ for (unsigned i = 0, N = Variables.size(); i < N; ++i)
+ if (DIE *Variable =
+ TheCU->constructVariableDIE(Variables[i], Scope->isAbstractScope()))
+ Children.push_back(Variable);
+ const SmallVector<LexicalScope *, 4> &Scopes = Scope->getChildren();
+ for (unsigned j = 0, M = Scopes.size(); j < M; ++j)
+ if (DIE *Nested = constructScopeDIE(TheCU, Scopes[j]))
+ Children.push_back(Nested);
DIScope DS(Scope->getScopeNode());
DIE *ScopeDIE = NULL;
if (Scope->getInlinedAt())
- ScopeDIE = constructInlinedScopeDIE(Scope);
+ ScopeDIE = constructInlinedScopeDIE(TheCU, Scope);
else if (DS.isSubprogram()) {
ProcessedSPNodes.insert(DS);
if (Scope->isAbstractScope()) {
- ScopeDIE = getCompileUnit(DS)->getDIE(DS);
+ ScopeDIE = TheCU->getDIE(DS);
// Note down abstract DIE.
if (ScopeDIE)
AbstractSPDies.insert(std::make_pair(DS, ScopeDIE));
}
else
- ScopeDIE = updateSubprogramScopeDIE(DS);
+ ScopeDIE = updateSubprogramScopeDIE(TheCU, DS);
}
- else
- ScopeDIE = constructLexicalScopeDIE(Scope);
- if (!ScopeDIE) return NULL;
-
- // Add variables to scope.
- const SmallVector<DbgVariable *, 8> &Variables = Scope->getDbgVariables();
- for (unsigned i = 0, N = Variables.size(); i < N; ++i) {
- DIE *VariableDIE = constructVariableDIE(Variables[i], Scope);
- if (VariableDIE)
- ScopeDIE->addChild(VariableDIE);
+ else {
+ // There is no need to emit empty lexical block DIE.
+ if (Children.empty())
+ return NULL;
+ ScopeDIE = constructLexicalScopeDIE(TheCU, Scope);
}
+
+ if (!ScopeDIE) return NULL;
- // 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);
- }
+ // Add children
+ for (SmallVector<DIE *, 8>::iterator I = Children.begin(),
+ E = Children.end(); I != E; ++I)
+ ScopeDIE->addChild(*I);
if (DS.isSubprogram())
- addPubTypes(DISubprogram(DS));
+ TheCU->addPubTypes(DISubprogram(DS));
- return ScopeDIE;
+ 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 FileName){
+unsigned DwarfDebug::GetOrCreateSourceID(StringRef FileName,
+ StringRef DirName) {
// If FE did not provide a file name, then assume stdin.
if (FileName.empty())
- return GetOrCreateSourceID("<stdin>");
+ return GetOrCreateSourceID("<stdin>", StringRef());
- StringMapEntry<unsigned> &Entry = SourceIdMap.GetOrCreateValue(FileName);
- if (Entry.getValue())
- return Entry.getValue();
+ // TODO: this might not belong here. See if we can factor this better.
+ if (DirName == CompilationDir)
+ DirName = "";
- unsigned SrcId = SourceIdMap.size();
- Entry.setValue(SrcId);
+ unsigned SrcId = SourceIdMap.size()+1;
+
+ // We look up the file/dir pair by concatenating them with a zero byte.
+ SmallString<128> NamePair;
+ NamePair += DirName;
+ NamePair += '\0'; // Zero bytes are not allowed in paths.
+ NamePair += FileName;
+
+ StringMapEntry<unsigned> &Ent = SourceIdMap.GetOrCreateValue(NamePair, SrcId);
+ if (Ent.getValue() != SrcId)
+ return Ent.getValue();
// Print out a .file directive to specify files for .loc directives.
- Asm->OutStreamer.EmitDwarfFileDirective(SrcId, FileName);
+ Asm->OutStreamer.EmitDwarfFileDirective(SrcId, DirName, FileName);
return SrcId;
}
-/// getOrCreateNameSpace - Create a DIE for DINameSpace.
-DIE *DwarfDebug::getOrCreateNameSpace(DINameSpace NS) {
- CompileUnit *TheCU = getCompileUnit(NS);
- DIE *NDie = TheCU->getDIE(NS);
- if (NDie)
- return NDie;
- NDie = new DIE(dwarf::DW_TAG_namespace);
- TheCU->insertDIE(NS, 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;
-}
-
/// constructCompileUnit - Create new CompileUnit for the given
/// metadata node with tag DW_TAG_compile_unit.
-void DwarfDebug::constructCompileUnit(const MDNode *N) {
+CompileUnit *DwarfDebug::constructCompileUnit(const MDNode *N) {
DICompileUnit DIUnit(N);
StringRef FN = DIUnit.getFilename();
- StringRef Dir = DIUnit.getDirectory();
- unsigned ID = GetOrCreateSourceID(FN);
+ CompilationDir = DIUnit.getDirectory();
+ unsigned ID = GetOrCreateSourceID(FN, CompilationDir);
DIE *Die = new DIE(dwarf::DW_TAG_compile_unit);
- 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);
- // Use DW_AT_entry_pc instead of DW_AT_low_pc/DW_AT_high_pc pair. This
- // simplifies debug range entries.
- addUInt(Die, dwarf::DW_AT_entry_pc, dwarf::DW_FORM_addr, 0);
+ CompileUnit *NewCU = new CompileUnit(ID, DIUnit.getLanguage(), Die, Asm, this);
+ NewCU->addString(Die, dwarf::DW_AT_producer, DIUnit.getProducer());
+ NewCU->addUInt(Die, dwarf::DW_AT_language, dwarf::DW_FORM_data2,
+ DIUnit.getLanguage());
+ NewCU->addString(Die, dwarf::DW_AT_name, FN);
+ // 2.17.1 requires that we use DW_AT_low_pc for a single entry point
+ // into an entity.
+ NewCU->addUInt(Die, dwarf::DW_AT_low_pc, dwarf::DW_FORM_addr, 0);
// DW_AT_stmt_list is a offset of line number information for this
// compile unit in debug_line section.
- if (Asm->MAI->doesDwarfUsesAbsoluteLabelForStmtList())
- addLabel(Die, dwarf::DW_AT_stmt_list, dwarf::DW_FORM_addr,
- Asm->GetTempSymbol("section_line"));
+ if (Asm->MAI->doesDwarfRequireRelocationForSectionOffset())
+ NewCU->addLabel(Die, dwarf::DW_AT_stmt_list, dwarf::DW_FORM_data4,
+ Asm->GetTempSymbol("section_line"));
else
- addUInt(Die, dwarf::DW_AT_stmt_list, dwarf::DW_FORM_data4, 0);
+ NewCU->addUInt(Die, dwarf::DW_AT_stmt_list, dwarf::DW_FORM_data4, 0);
- if (!Dir.empty())
- addString(Die, dwarf::DW_AT_comp_dir, dwarf::DW_FORM_string, Dir);
+ if (!CompilationDir.empty())
+ NewCU->addString(Die, dwarf::DW_AT_comp_dir, CompilationDir);
if (DIUnit.isOptimized())
- addUInt(Die, dwarf::DW_AT_APPLE_optimized, dwarf::DW_FORM_flag, 1);
+ NewCU->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,
+ NewCU->addString(Die, dwarf::DW_AT_APPLE_flags, Flags);
+
+ if (unsigned RVer = DIUnit.getRunTimeVersion())
+ NewCU->addUInt(Die, dwarf::DW_AT_APPLE_major_runtime_vers,
dwarf::DW_FORM_data1, RVer);
- CompileUnit *NewCU = new CompileUnit(ID, Die);
if (!FirstCU)
FirstCU = NewCU;
CUMap.insert(std::make_pair(N, NewCU));
-}
-
-/// getCompielUnit - Get CompileUnit DIE.
-CompileUnit *DwarfDebug::getCompileUnit(const MDNode *N) const {
- assert (N && "Invalid DwarfDebug::getCompileUnit argument!");
- DIDescriptor D(N);
- const MDNode *CUNode = NULL;
- if (D.isCompileUnit())
- CUNode = N;
- else if (D.isSubprogram())
- CUNode = DISubprogram(N).getCompileUnit();
- else if (D.isType())
- CUNode = DIType(N).getCompileUnit();
- else if (D.isGlobalVariable())
- CUNode = DIGlobalVariable(N).getCompileUnit();
- else if (D.isVariable())
- CUNode = DIVariable(N).getCompileUnit();
- else if (D.isNameSpace())
- CUNode = DINameSpace(N).getCompileUnit();
- else if (D.isFile())
- CUNode = DIFile(N).getCompileUnit();
- else
- return FirstCU;
-
- DenseMap<const MDNode *, CompileUnit *>::const_iterator I
- = CUMap.find(CUNode);
- if (I == CUMap.end())
- return FirstCU;
- return I->second;
-}
-
-/// isUnsignedDIType - Return true if type encoding is unsigned.
-static bool isUnsignedDIType(DIType Ty) {
- DIDerivedType DTy(Ty);
- if (DTy.Verify())
- return isUnsignedDIType(DTy.getTypeDerivedFrom());
-
- DIBasicType BTy(Ty);
- if (BTy.Verify()) {
- unsigned Encoding = BTy.getEncoding();
- if (Encoding == dwarf::DW_ATE_unsigned ||
- Encoding == dwarf::DW_ATE_unsigned_char)
- return true;
- }
- return false;
-}
-
-// Return const exprssion if value is a GEP to access merged global
-// constant. e.g.
-// i8* getelementptr ({ i8, i8, i8, i8 }* @_MergedGlobals, i32 0, i32 0)
-static const ConstantExpr *getMergedGlobalExpr(const Value *V) {
- const ConstantExpr *CE = dyn_cast_or_null<ConstantExpr>(V);
- if (!CE || CE->getNumOperands() != 3 ||
- CE->getOpcode() != Instruction::GetElementPtr)
- return NULL;
-
- // First operand points to a global value.
- if (!isa<GlobalValue>(CE->getOperand(0)))
- return NULL;
-
- // Second operand is zero.
- const ConstantInt *CI =
- dyn_cast_or_null<ConstantInt>(CE->getOperand(1));
- if (!CI || !CI->isZero())
- return NULL;
-
- // Third operand is offset.
- if (!isa<ConstantInt>(CE->getOperand(2)))
- return NULL;
-
- return CE;
-}
-
-/// constructGlobalVariableDIE - Construct global variable DIE.
-void DwarfDebug::constructGlobalVariableDIE(const MDNode *N) {
- DIGlobalVariable GV(N);
-
- // If debug information is malformed then ignore it.
- if (GV.Verify() == false)
- return;
-
- // Check for pre-existence.
- CompileUnit *TheCU = getCompileUnit(N);
- if (TheCU->getDIE(GV))
- return;
-
- DIType GTy = GV.getType();
- DIE *VariableDIE = new DIE(GV.getTag());
-
- bool isGlobalVariable = GV.getGlobal() != NULL;
-
- // Add name.
- addString(VariableDIE, dwarf::DW_AT_name, dwarf::DW_FORM_string,
- GV.getDisplayName());
- StringRef LinkageName = GV.getLinkageName();
- if (!LinkageName.empty() && isGlobalVariable)
- addString(VariableDIE, dwarf::DW_AT_MIPS_linkage_name, dwarf::DW_FORM_string,
- getRealLinkageName(LinkageName));
- // Add type.
- addType(VariableDIE, GTy);
- if (GTy.isCompositeType() && !GTy.getName().empty()
- && !GTy.isForwardDecl()) {
- DIEEntry *Entry = TheCU->getDIEEntry(GTy);
- assert(Entry && "Missing global type!");
- TheCU->addGlobalType(GTy.getName(), Entry->getEntry());
- }
- // Add scoping info.
- if (!GV.isLocalToUnit()) {
- addUInt(VariableDIE, dwarf::DW_AT_external, dwarf::DW_FORM_flag, 1);
- // Expose as global.
- TheCU->addGlobal(GV.getName(), VariableDIE);
- }
- // Add line number info.
- addSourceLine(VariableDIE, GV);
- // Add to map.
- TheCU->insertDIE(N, VariableDIE);
- // Add to context owner.
- DIDescriptor GVContext = GV.getContext();
- addToContextOwner(VariableDIE, GVContext);
- // Add location.
- if (isGlobalVariable) {
- DIEBlock *Block = new (DIEValueAllocator) DIEBlock();
- addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_addr);
- addLabel(Block, 0, dwarf::DW_FORM_udata,
- Asm->Mang->getSymbol(GV.getGlobal()));
- // Do not create specification DIE if context is either compile unit
- // or a subprogram.
- if (GV.isDefinition() && !GVContext.isCompileUnit() &&
- !GVContext.isFile() && !isSubprogramContext(GVContext)) {
- // Create specification DIE.
- DIE *VariableSpecDIE = new DIE(dwarf::DW_TAG_variable);
- addDIEEntry(VariableSpecDIE, dwarf::DW_AT_specification,
- dwarf::DW_FORM_ref4, VariableDIE);
- addBlock(VariableSpecDIE, dwarf::DW_AT_location, 0, Block);
- addUInt(VariableDIE, dwarf::DW_AT_declaration, dwarf::DW_FORM_flag, 1);
- TheCU->addDie(VariableSpecDIE);
- } else {
- addBlock(VariableDIE, dwarf::DW_AT_location, 0, Block);
- }
- } else if (ConstantInt *CI =
- dyn_cast_or_null<ConstantInt>(GV.getConstant()))
- addConstantValue(VariableDIE, CI, isUnsignedDIType(GTy));
- else if (const ConstantExpr *CE = getMergedGlobalExpr(N->getOperand(11))) {
- // GV is a merged global.
- DIEBlock *Block = new (DIEValueAllocator) DIEBlock();
- addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_addr);
- addLabel(Block, 0, dwarf::DW_FORM_udata,
- Asm->Mang->getSymbol(cast<GlobalValue>(CE->getOperand(0))));
- ConstantInt *CII = cast<ConstantInt>(CE->getOperand(2));
- addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_constu);
- addUInt(Block, 0, dwarf::DW_FORM_udata, CII->getZExtValue());
- addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_plus);
- addBlock(VariableDIE, dwarf::DW_AT_location, 0, Block);
- }
-
- return;
+ return NewCU;
}
/// construct SubprogramDIE - Construct subprogram DIE.
-void DwarfDebug::constructSubprogramDIE(const MDNode *N) {
- DISubprogram SP(N);
-
- // Check for pre-existence.
- CompileUnit *TheCU = getCompileUnit(N);
- if (TheCU->getDIE(N))
+void DwarfDebug::constructSubprogramDIE(CompileUnit *TheCU,
+ const MDNode *N) {
+ CompileUnit *&CURef = SPMap[N];
+ if (CURef)
return;
+ CURef = TheCU;
+ DISubprogram SP(N);
if (!SP.isDefinition())
// This is a method declaration which will be handled while constructing
// class type.
return;
- DIE *SubprogramDie = createSubprogramDIE(SP);
+ DIE *SubprogramDie = TheCU->getOrCreateSubprogramDIE(SP);
// Add to map.
TheCU->insertDIE(N, SubprogramDie);
// Add to context owner.
- addToContextOwner(SubprogramDie, SP.getContext());
-
- // Expose as global.
- TheCU->addGlobal(SP.getName(), SubprogramDie);
+ TheCU->addToContextOwner(SubprogramDie, SP.getContext());
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) {
- if (DisableDebugInfoPrinting)
- return;
+/// collectInfoFromNamedMDNodes - Collect debug info from named mdnodes such
+/// as llvm.dbg.enum and llvm.dbg.ty
+void DwarfDebug::collectInfoFromNamedMDNodes(Module *M) {
+ if (NamedMDNode *NMD = M->getNamedMetadata("llvm.dbg.sp"))
+ for (unsigned i = 0, e = NMD->getNumOperands(); i != e; ++i) {
+ const MDNode *N = NMD->getOperand(i);
+ if (CompileUnit *CU = CUMap.lookup(DISubprogram(N).getCompileUnit()))
+ constructSubprogramDIE(CU, N);
+ }
+
+ if (NamedMDNode *NMD = M->getNamedMetadata("llvm.dbg.gv"))
+ for (unsigned i = 0, e = NMD->getNumOperands(); i != e; ++i) {
+ const MDNode *N = NMD->getOperand(i);
+ if (CompileUnit *CU = CUMap.lookup(DIGlobalVariable(N).getCompileUnit()))
+ CU->createGlobalVariableDIE(N);
+ }
+
+ if (NamedMDNode *NMD = M->getNamedMetadata("llvm.dbg.enum"))
+ for (unsigned i = 0, e = NMD->getNumOperands(); i != e; ++i) {
+ DIType Ty(NMD->getOperand(i));
+ if (CompileUnit *CU = CUMap.lookup(Ty.getCompileUnit()))
+ CU->getOrCreateTypeDIE(Ty);
+ }
+
+ if (NamedMDNode *NMD = M->getNamedMetadata("llvm.dbg.ty"))
+ for (unsigned i = 0, e = NMD->getNumOperands(); i != e; ++i) {
+ DIType Ty(NMD->getOperand(i));
+ if (CompileUnit *CU = CUMap.lookup(Ty.getCompileUnit()))
+ CU->getOrCreateTypeDIE(Ty);
+ }
+}
+/// collectLegacyDebugInfo - Collect debug info using DebugInfoFinder.
+/// FIXME - Remove this when dragon-egg and llvm-gcc switch to DIBuilder.
+bool DwarfDebug::collectLegacyDebugInfo(Module *M) {
DebugInfoFinder DbgFinder;
DbgFinder.processModule(*M);
-
+
bool HasDebugInfo = false;
-
- // Scan all the compile-units to see if there are any marked as the main unit.
- // if not, we do not generate debug info.
+ // Scan all the compile-units to see if there are any marked as the main
+ // unit. If not, we do not generate debug info.
for (DebugInfoFinder::iterator I = DbgFinder.compile_unit_begin(),
- E = DbgFinder.compile_unit_end(); I != E; ++I) {
+ E = DbgFinder.compile_unit_end(); I != E; ++I) {
if (DICompileUnit(*I).isMain()) {
HasDebugInfo = true;
break;
}
}
-
- if (!HasDebugInfo) return;
-
- // Tell MMI that we have debug info.
- MMI->setDebugInfoAvailability(true);
-
- // Emit initial sections.
- EmitSectionLabels();
-
+ if (!HasDebugInfo) return false;
+
// Create all the compile unit DIEs.
for (DebugInfoFinder::iterator I = DbgFinder.compile_unit_begin(),
E = DbgFinder.compile_unit_end(); I != E; ++I)
constructCompileUnit(*I);
-
+
+ // Create DIEs for each global variable.
+ for (DebugInfoFinder::iterator I = DbgFinder.global_variable_begin(),
+ E = DbgFinder.global_variable_end(); I != E; ++I) {
+ const MDNode *N = *I;
+ if (CompileUnit *CU = CUMap.lookup(DIGlobalVariable(N).getCompileUnit()))
+ CU->createGlobalVariableDIE(N);
+ }
+
// Create DIEs for each subprogram.
for (DebugInfoFinder::iterator I = DbgFinder.subprogram_begin(),
- E = DbgFinder.subprogram_end(); I != E; ++I)
- constructSubprogramDIE(*I);
+ E = DbgFinder.subprogram_end(); I != E; ++I) {
+ const MDNode *N = *I;
+ if (CompileUnit *CU = CUMap.lookup(DISubprogram(N).getCompileUnit()))
+ constructSubprogramDIE(CU, N);
+ }
- // Create DIEs for each global variable.
- for (DebugInfoFinder::iterator I = DbgFinder.global_variable_begin(),
- E = DbgFinder.global_variable_end(); I != E; ++I)
- constructGlobalVariableDIE(*I);
+ return HasDebugInfo;
+}
- //getOrCreateTypeDIE
- if (NamedMDNode *NMD = M->getNamedMetadata("llvm.dbg.enum"))
- for (unsigned i = 0, e = NMD->getNumOperands(); i != e; ++i)
- getOrCreateTypeDIE(DIType(NMD->getOperand(i)));
+/// beginModule - Emit all Dwarf sections that should come prior to the
+/// content. Create global DIEs and emit initial debug info sections.
+/// This is invoked by the target AsmPrinter.
+void DwarfDebug::beginModule(Module *M) {
+ if (DisableDebugInfoPrinting)
+ return;
- if (NamedMDNode *NMD = M->getNamedMetadata("llvm.dbg.ty"))
- for (unsigned i = 0, e = NMD->getNumOperands(); i != e; ++i)
- getOrCreateTypeDIE(DIType(NMD->getOperand(i)));
+ // If module has named metadata anchors then use them, otherwise scan the
+ // module using debug info finder to collect debug info.
+ NamedMDNode *CU_Nodes = M->getNamedMetadata("llvm.dbg.cu");
+ if (CU_Nodes) {
+ for (unsigned i = 0, e = CU_Nodes->getNumOperands(); i != e; ++i) {
+ DICompileUnit CUNode(CU_Nodes->getOperand(i));
+ CompileUnit *CU = constructCompileUnit(CUNode);
+ DIArray GVs = CUNode.getGlobalVariables();
+ for (unsigned i = 0, e = GVs.getNumElements(); i != e; ++i)
+ CU->createGlobalVariableDIE(GVs.getElement(i));
+ DIArray SPs = CUNode.getSubprograms();
+ for (unsigned i = 0, e = SPs.getNumElements(); i != e; ++i)
+ constructSubprogramDIE(CU, SPs.getElement(i));
+ DIArray EnumTypes = CUNode.getEnumTypes();
+ for (unsigned i = 0, e = EnumTypes.getNumElements(); i != e; ++i)
+ CU->getOrCreateTypeDIE(EnumTypes.getElement(i));
+ DIArray RetainedTypes = CUNode.getRetainedTypes();
+ for (unsigned i = 0, e = RetainedTypes.getNumElements(); i != e; ++i)
+ CU->getOrCreateTypeDIE(RetainedTypes.getElement(i));
+ }
+ } else if (!collectLegacyDebugInfo(M))
+ return;
+
+ collectInfoFromNamedMDNodes(M);
+
+ // Tell MMI that we have debug info.
+ MMI->setDebugInfoAvailability(true);
+
+ // Emit initial sections.
+ EmitSectionLabels();
// Prime section data.
SectionMap.insert(Asm->getObjFileLowering().getTextSection());
void DwarfDebug::endModule() {
if (!FirstCU) return;
const Module *M = MMI->getModule();
- DenseMap<const MDNode *, DbgScope *> DeadFnScopeMap;
- if (NamedMDNode *AllSPs = M->getNamedMetadata("llvm.dbg.sp")) {
- for (unsigned SI = 0, SE = AllSPs->getNumOperands(); SI != SE; ++SI) {
- if (ProcessedSPNodes.count(AllSPs->getOperand(SI)) != 0) continue;
- DISubprogram SP(AllSPs->getOperand(SI));
- if (!SP.Verify()) continue;
-
- // Collect info for variables that were optimized out.
- if (!SP.isDefinition()) continue;
- StringRef FName = SP.getLinkageName();
- if (FName.empty())
- FName = SP.getName();
- NamedMDNode *NMD = getFnSpecificMDNode(*(MMI->getModule()), FName);
- if (!NMD) continue;
- unsigned E = NMD->getNumOperands();
- if (!E) continue;
- DbgScope *Scope = new DbgScope(NULL, DIDescriptor(SP), NULL);
- DeadFnScopeMap[SP] = Scope;
- for (unsigned I = 0; I != E; ++I) {
- DIVariable DV(NMD->getOperand(I));
- if (!DV.Verify()) continue;
- Scope->addVariable(new DbgVariable(DV));
- }
+ DenseMap<const MDNode *, LexicalScope *> DeadFnScopeMap;
- // Construct subprogram DIE and add variables DIEs.
- constructSubprogramDIE(SP);
- DIE *ScopeDIE = getCompileUnit(SP)->getDIE(SP);
- const SmallVector<DbgVariable *, 8> &Variables = Scope->getDbgVariables();
- for (unsigned i = 0, N = Variables.size(); i < N; ++i) {
- DIE *VariableDIE = constructVariableDIE(Variables[i], Scope);
- if (VariableDIE)
- ScopeDIE->addChild(VariableDIE);
+ // Collect info for variables that were optimized out.
+ if (NamedMDNode *CU_Nodes = M->getNamedMetadata("llvm.dbg.cu")) {
+ for (unsigned i = 0, e = CU_Nodes->getNumOperands(); i != e; ++i) {
+ DICompileUnit TheCU(CU_Nodes->getOperand(i));
+ DIArray Subprograms = TheCU.getSubprograms();
+ for (unsigned i = 0, e = Subprograms.getNumElements(); i != e; ++i) {
+ DISubprogram SP(Subprograms.getElement(i));
+ if (ProcessedSPNodes.count(SP) != 0) continue;
+ if (!SP.Verify()) continue;
+ if (!SP.isDefinition()) continue;
+ DIArray Variables = SP.getVariables();
+ if (Variables.getNumElements() == 0) continue;
+
+ LexicalScope *Scope =
+ new LexicalScope(NULL, DIDescriptor(SP), NULL, false);
+ DeadFnScopeMap[SP] = Scope;
+
+ // Construct subprogram DIE and add variables DIEs.
+ CompileUnit *SPCU = CUMap.lookup(TheCU);
+ assert(SPCU && "Unable to find Compile Unit!");
+ constructSubprogramDIE(SPCU, SP);
+ DIE *ScopeDIE = SPCU->getDIE(SP);
+ for (unsigned vi = 0, ve = Variables.getNumElements(); vi != ve; ++vi) {
+ DIVariable DV(Variables.getElement(vi));
+ if (!DV.Verify()) continue;
+ DbgVariable *NewVar = new DbgVariable(DV, NULL);
+ if (DIE *VariableDIE =
+ SPCU->constructVariableDIE(NewVar, Scope->isAbstractScope()))
+ ScopeDIE->addChild(VariableDIE);
+ }
}
}
}
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);
+ FirstCU->addUInt(ISP, dwarf::DW_AT_inline, 0, dwarf::DW_INL_inlined);
+ }
+ for (DenseMap<const MDNode *, DIE *>::iterator AI = AbstractSPDies.begin(),
+ AE = AbstractSPDies.end(); AI != AE; ++AI) {
+ DIE *ISP = AI->second;
+ if (InlinedSubprogramDIEs.count(ISP))
+ continue;
+ FirstCU->addUInt(ISP, dwarf::DW_AT_inline, 0, dwarf::DW_INL_inlined);
}
- for (DenseMap<DIE *, const MDNode *>::iterator CI = ContainingTypeMap.begin(),
- CE = ContainingTypeMap.end(); CI != CE; ++CI) {
- DIE *SPDie = CI->first;
- const MDNode *N = dyn_cast_or_null<MDNode>(CI->second);
- if (!N) continue;
- DIE *NDie = getCompileUnit(N)->getDIE(N);
- if (!NDie) continue;
- addDIEEntry(SPDie, dwarf::DW_AT_containing_type, dwarf::DW_FORM_ref4, NDie);
+ // Emit DW_AT_containing_type attribute to connect types with their
+ // vtable holding type.
+ for (DenseMap<const MDNode *, CompileUnit *>::iterator CUI = CUMap.begin(),
+ CUE = CUMap.end(); CUI != CUE; ++CUI) {
+ CompileUnit *TheCU = CUI->second;
+ TheCU->constructContainingTypeDIEs();
}
// Standard sections final addresses.
Asm->OutStreamer.EmitLabel(Asm->GetTempSymbol("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();
// Corresponding abbreviations into a abbrev section.
emitAbbreviations();
- // Emit info into a debug pubnames section.
- emitDebugPubNames();
-
+ // Emit info into a dwarf accelerator table sections.
+ if (DwarfAccelTables) {
+ emitAccelNames();
+ emitAccelObjC();
+ emitAccelNamespaces();
+ emitAccelTypes();
+ }
+
// Emit info into a debug pubtypes section.
emitDebugPubTypes();
// clean up.
DeleteContainerSeconds(DeadFnScopeMap);
+ SPMap.clear();
for (DenseMap<const MDNode *, CompileUnit *>::iterator I = CUMap.begin(),
E = CUMap.end(); I != E; ++I)
delete I->second;
}
/// findAbstractVariable - Find abstract variable, if any, associated with Var.
-DbgVariable *DwarfDebug::findAbstractVariable(DIVariable &Var,
+DbgVariable *DwarfDebug::findAbstractVariable(DIVariable &DV,
DebugLoc ScopeLoc) {
-
+ LLVMContext &Ctx = DV->getContext();
+ // More then one inlined variable corresponds to one abstract variable.
+ DIVariable Var = cleanseInlinedVariable(DV, Ctx);
DbgVariable *AbsDbgVariable = AbstractVariables.lookup(Var);
if (AbsDbgVariable)
return AbsDbgVariable;
- LLVMContext &Ctx = Var->getContext();
- DbgScope *Scope = AbstractScopes.lookup(ScopeLoc.getScope(Ctx));
+ LexicalScope *Scope = LScopes.findAbstractScope(ScopeLoc.getScope(Ctx));
if (!Scope)
return NULL;
- AbsDbgVariable = new DbgVariable(Var);
- Scope->addVariable(AbsDbgVariable);
+ AbsDbgVariable = new DbgVariable(Var, NULL);
+ addScopeVariable(Scope, AbsDbgVariable);
AbstractVariables[Var] = AbsDbgVariable;
return AbsDbgVariable;
}
+/// addCurrentFnArgument - If Var is a current function argument then add
+/// it to CurrentFnArguments list.
+bool DwarfDebug::addCurrentFnArgument(const MachineFunction *MF,
+ DbgVariable *Var, LexicalScope *Scope) {
+ if (!LScopes.isCurrentFunctionScope(Scope))
+ return false;
+ DIVariable DV = Var->getVariable();
+ if (DV.getTag() != dwarf::DW_TAG_arg_variable)
+ return false;
+ unsigned ArgNo = DV.getArgNumber();
+ if (ArgNo == 0)
+ return false;
+
+ size_t Size = CurrentFnArguments.size();
+ if (Size == 0)
+ CurrentFnArguments.resize(MF->getFunction()->arg_size());
+ // llvm::Function argument size is not good indicator of how many
+ // arguments does the function have at source level.
+ if (ArgNo > Size)
+ CurrentFnArguments.resize(ArgNo * 2);
+ CurrentFnArguments[ArgNo - 1] = Var;
+ return true;
+}
+
/// collectVariableInfoFromMMITable - Collect variable information from
/// side table maintained by MMI.
void
-DwarfDebug::collectVariableInfoFromMMITable(const MachineFunction * MF,
+DwarfDebug::collectVariableInfoFromMMITable(const MachineFunction *MF,
SmallPtrSet<const MDNode *, 16> &Processed) {
- const LLVMContext &Ctx = Asm->MF->getFunction()->getContext();
MachineModuleInfo::VariableDbgInfoMapTy &VMap = MMI->getVariableDbgInfo();
for (MachineModuleInfo::VariableDbgInfoMapTy::iterator VI = VMap.begin(),
VE = VMap.end(); VI != VE; ++VI) {
DIVariable DV(Var);
const std::pair<unsigned, DebugLoc> &VP = VI->second;
- DbgScope *Scope = 0;
- if (const MDNode *IA = VP.second.getInlinedAt(Ctx))
- Scope = ConcreteScopes.lookup(IA);
- if (Scope == 0)
- Scope = DbgScopeMap.lookup(VP.second.getScope(Ctx));
+ LexicalScope *Scope = LScopes.findLexicalScope(VP.second);
// If variable scope is not found then skip this variable.
if (Scope == 0)
continue;
DbgVariable *AbsDbgVariable = findAbstractVariable(DV, VP.second);
- DbgVariable *RegVar = new DbgVariable(DV);
- recordVariableFrameIndex(RegVar, VP.first);
- Scope->addVariable(RegVar);
- if (AbsDbgVariable) {
- recordVariableFrameIndex(AbsDbgVariable, VP.first);
- VarToAbstractVarMap[RegVar] = AbsDbgVariable;
- }
+ DbgVariable *RegVar = new DbgVariable(DV, AbsDbgVariable);
+ RegVar->setFrameIndex(VP.first);
+ if (!addCurrentFnArgument(MF, RegVar, Scope))
+ addScopeVariable(Scope, RegVar);
+ if (AbsDbgVariable)
+ AbsDbgVariable->setFrameIndex(VP.first);
}
}
/// isDbgValueInDefinedReg - Return true if debug value, encoded by
/// DBG_VALUE instruction, is in a defined reg.
static bool isDbgValueInDefinedReg(const MachineInstr *MI) {
- assert (MI->isDebugValue() && "Invalid DBG_VALUE machine instruction!");
- if (MI->getOperand(0).isReg() && MI->getOperand(0).getReg())
- return true;
- return false;
-}
-
-/// collectVariableInfo - Populate DbgScope entries with variables' info.
-void
-DwarfDebug::collectVariableInfo(const MachineFunction *MF,
- SmallPtrSet<const MDNode *, 16> &Processed) {
-
- /// collection info from MMI table.
- collectVariableInfoFromMMITable(MF, Processed);
-
- SmallVector<const MachineInstr *, 8> DbgValues;
- // Collect variable information from DBG_VALUE machine instructions;
- for (MachineFunction::const_iterator I = Asm->MF->begin(), E = Asm->MF->end();
- I != E; ++I)
- for (MachineBasicBlock::const_iterator II = I->begin(), IE = I->end();
- II != IE; ++II) {
- const MachineInstr *MInsn = II;
- if (!MInsn->isDebugValue())
- continue;
- DbgValues.push_back(MInsn);
- }
-
- // This is a collection of DBV_VALUE instructions describing same variable.
- SmallVector<const MachineInstr *, 4> MultipleValues;
- for(SmallVector<const MachineInstr *, 8>::iterator I = DbgValues.begin(),
- E = DbgValues.end(); I != E; ++I) {
- const MachineInstr *MInsn = *I;
- MultipleValues.clear();
- if (isDbgValueInDefinedReg(MInsn))
- MultipleValues.push_back(MInsn);
- DIVariable DV(MInsn->getOperand(MInsn->getNumOperands() - 1).getMetadata());
- if (Processed.count(DV) != 0)
- continue;
-
- const MachineInstr *PrevMI = MInsn;
- for (SmallVector<const MachineInstr *, 8>::iterator MI = I+1,
- ME = DbgValues.end(); MI != ME; ++MI) {
- const MDNode *Var =
- (*MI)->getOperand((*MI)->getNumOperands()-1).getMetadata();
- if (Var == DV &&
- !PrevMI->isIdenticalTo(*MI))
- MultipleValues.push_back(*MI);
- PrevMI = *MI;
- }
-
- DbgScope *Scope = NULL;
- if (DV.getTag() == dwarf::DW_TAG_arg_variable &&
- DISubprogram(DV.getContext()).describes(MF->getFunction()))
- Scope = CurrentFnDbgScope;
- else
- Scope = findDbgScope(MInsn);
- // If variable scope is not found then skip this variable.
- if (!Scope)
- continue;
-
- Processed.insert(DV);
- DbgVariable *RegVar = new DbgVariable(DV);
- Scope->addVariable(RegVar);
- if (DbgVariable *AbsVar = findAbstractVariable(DV, MInsn->getDebugLoc())) {
- DbgVariableToDbgInstMap[AbsVar] = MInsn;
- VarToAbstractVarMap[RegVar] = AbsVar;
- }
- if (MultipleValues.size() <= 1) {
- DbgVariableToDbgInstMap[RegVar] = MInsn;
- continue;
- }
-
- // handle multiple DBG_VALUE instructions describing one variable.
- if (DotDebugLocEntries.empty())
- RegVar->setDotDebugLocOffset(0);
- else
- RegVar->setDotDebugLocOffset(DotDebugLocEntries.size());
- const MachineInstr *Begin = NULL;
- const MachineInstr *End = NULL;
- for (SmallVector<const MachineInstr *, 4>::iterator
- MVI = MultipleValues.begin(), MVE = MultipleValues.end();
- MVI != MVE; ++MVI) {
- if (!Begin) {
- Begin = *MVI;
- continue;
- }
- End = *MVI;
- MachineLocation MLoc;
- if (Begin->getNumOperands() == 3) {
- if (Begin->getOperand(0).isReg() && Begin->getOperand(1).isImm())
- MLoc.set(Begin->getOperand(0).getReg(), Begin->getOperand(1).getImm());
- } else
- MLoc = Asm->getDebugValueLocation(Begin);
-
- const MCSymbol *FLabel = getLabelBeforeInsn(Begin);
- const MCSymbol *SLabel = getLabelBeforeInsn(End);
- if (MLoc.getReg())
- DotDebugLocEntries.push_back(DotDebugLocEntry(FLabel, SLabel, MLoc));
-
- Begin = End;
- if (MVI + 1 == MVE) {
- // If End is the last instruction then its value is valid
- // until the end of the funtion.
- MachineLocation EMLoc;
- if (End->getNumOperands() == 3) {
- if (End->getOperand(0).isReg() && Begin->getOperand(1).isImm())
- EMLoc.set(Begin->getOperand(0).getReg(), Begin->getOperand(1).getImm());
- } else
- EMLoc = Asm->getDebugValueLocation(End);
- if (EMLoc.getReg())
- DotDebugLocEntries.
- push_back(DotDebugLocEntry(SLabel, FunctionEndSym, EMLoc));
- }
- }
- DotDebugLocEntries.push_back(DotDebugLocEntry());
- }
-
- // Collect info for variables that were optimized out.
- const Function *F = MF->getFunction();
- if (NamedMDNode *NMD = getFnSpecificMDNode(*(F->getParent()), F->getName())) {
- for (unsigned i = 0, e = NMD->getNumOperands(); i != e; ++i) {
- DIVariable DV(cast<MDNode>(NMD->getOperand(i)));
- if (!DV || !Processed.insert(DV))
- continue;
- DbgScope *Scope = DbgScopeMap.lookup(DV.getContext());
- if (Scope)
- Scope->addVariable(new DbgVariable(DV));
- }
- }
-}
-
-/// getLabelBeforeInsn - Return Label preceding the instruction.
-const MCSymbol *DwarfDebug::getLabelBeforeInsn(const MachineInstr *MI) {
- DenseMap<const MachineInstr *, MCSymbol *>::iterator I =
- LabelsBeforeInsn.find(MI);
- if (I == LabelsBeforeInsn.end())
- // FunctionBeginSym always preceeds all the instruction in current function.
- return FunctionBeginSym;
- return I->second;
-}
-
-/// getLabelAfterInsn - Return Label immediately following the instruction.
-const MCSymbol *DwarfDebug::getLabelAfterInsn(const MachineInstr *MI) {
- DenseMap<const MachineInstr *, MCSymbol *>::iterator I =
- LabelsAfterInsn.find(MI);
- if (I == LabelsAfterInsn.end())
- return NULL;
- return I->second;
+ assert(MI->isDebugValue() && "Invalid DBG_VALUE machine instruction!");
+ return MI->getNumOperands() == 3 &&
+ MI->getOperand(0).isReg() && MI->getOperand(0).getReg() &&
+ MI->getOperand(1).isImm() && MI->getOperand(1).getImm() == 0;
}
-/// beginInstruction - Process beginning of an instruction.
-void DwarfDebug::beginInstruction(const MachineInstr *MI) {
- if (InsnNeedsLabel.count(MI) == 0) {
- LabelsBeforeInsn[MI] = PrevLabel;
- return;
- }
-
- // Check location.
- DebugLoc DL = MI->getDebugLoc();
- if (!DL.isUnknown()) {
- const MDNode *Scope = DL.getScope(Asm->MF->getFunction()->getContext());
- PrevLabel = recordSourceLine(DL.getLine(), DL.getCol(), Scope);
- PrevInstLoc = DL;
- LabelsBeforeInsn[MI] = PrevLabel;
- return;
- }
+/// getDebugLocEntry - Get .debug_loc entry for the instruction range starting
+/// at MI.
+static DotDebugLocEntry getDebugLocEntry(AsmPrinter *Asm,
+ const MCSymbol *FLabel,
+ const MCSymbol *SLabel,
+ const MachineInstr *MI) {
+ const MDNode *Var = MI->getOperand(MI->getNumOperands() - 1).getMetadata();
- // If location is unknown then use temp label for this DBG_VALUE
- // instruction.
- if (MI->isDebugValue()) {
- PrevLabel = MMI->getContext().CreateTempSymbol();
- Asm->OutStreamer.EmitLabel(PrevLabel);
- LabelsBeforeInsn[MI] = PrevLabel;
- return;
+ if (MI->getNumOperands() != 3) {
+ MachineLocation MLoc = Asm->getDebugValueLocation(MI);
+ return DotDebugLocEntry(FLabel, SLabel, MLoc, Var);
}
-
- if (UnknownLocations) {
- PrevLabel = recordSourceLine(0, 0, 0);
- LabelsBeforeInsn[MI] = PrevLabel;
- return;
+ if (MI->getOperand(0).isReg() && MI->getOperand(1).isImm()) {
+ MachineLocation MLoc;
+ MLoc.set(MI->getOperand(0).getReg(), MI->getOperand(1).getImm());
+ return DotDebugLocEntry(FLabel, SLabel, MLoc, Var);
}
+ if (MI->getOperand(0).isImm())
+ return DotDebugLocEntry(FLabel, SLabel, MI->getOperand(0).getImm());
+ if (MI->getOperand(0).isFPImm())
+ return DotDebugLocEntry(FLabel, SLabel, MI->getOperand(0).getFPImm());
+ if (MI->getOperand(0).isCImm())
+ return DotDebugLocEntry(FLabel, SLabel, MI->getOperand(0).getCImm());
- assert (0 && "Instruction is not processed!");
-}
-
-/// endInstruction - Process end of an instruction.
-void DwarfDebug::endInstruction(const MachineInstr *MI) {
- if (InsnsEndScopeSet.count(MI) != 0) {
- // Emit a label if this instruction ends a scope.
- MCSymbol *Label = MMI->getContext().CreateTempSymbol();
- Asm->OutStreamer.EmitLabel(Label);
- LabelsAfterInsn[MI] = Label;
- }
+ llvm_unreachable("Unexpected 3 operand DBG_VALUE instruction!");
}
-/// getOrCreateDbgScope - Create DbgScope for the scope.
-DbgScope *DwarfDebug::getOrCreateDbgScope(const MDNode *Scope,
- const MDNode *InlinedAt) {
- if (!InlinedAt) {
- DbgScope *WScope = DbgScopeMap.lookup(Scope);
- if (WScope)
- return WScope;
- WScope = new DbgScope(NULL, DIDescriptor(Scope), NULL);
- DbgScopeMap.insert(std::make_pair(Scope, WScope));
- if (DIDescriptor(Scope).isLexicalBlock()) {
- DbgScope *Parent =
- getOrCreateDbgScope(DILexicalBlock(Scope).getContext(), NULL);
- WScope->setParent(Parent);
- Parent->addScope(WScope);
- }
-
- if (!WScope->getParent()) {
- StringRef SPName = DISubprogram(Scope).getLinkageName();
- // We used to check only for a linkage name, but that fails
- // since we began omitting the linkage name for private
- // functions. The new way is to check for the name in metadata,
- // but that's not supported in old .ll test cases. Ergo, we
- // check both.
- if (SPName == Asm->MF->getFunction()->getName() ||
- DISubprogram(Scope).getFunction() == Asm->MF->getFunction())
- CurrentFnDbgScope = WScope;
- }
-
- return WScope;
- }
+/// collectVariableInfo - Find variables for each lexical scope.
+void
+DwarfDebug::collectVariableInfo(const MachineFunction *MF,
+ SmallPtrSet<const MDNode *, 16> &Processed) {
- getOrCreateAbstractScope(Scope);
- DbgScope *WScope = DbgScopeMap.lookup(InlinedAt);
- if (WScope)
- return WScope;
+ /// collection info from MMI table.
+ collectVariableInfoFromMMITable(MF, Processed);
- WScope = new DbgScope(NULL, DIDescriptor(Scope), InlinedAt);
- DbgScopeMap.insert(std::make_pair(InlinedAt, WScope));
- DILocation DL(InlinedAt);
- DbgScope *Parent =
- getOrCreateDbgScope(DL.getScope(), DL.getOrigLocation());
- WScope->setParent(Parent);
- Parent->addScope(WScope);
+ for (SmallVectorImpl<const MDNode*>::const_iterator
+ UVI = UserVariables.begin(), UVE = UserVariables.end(); UVI != UVE;
+ ++UVI) {
+ const MDNode *Var = *UVI;
+ if (Processed.count(Var))
+ continue;
- ConcreteScopes[InlinedAt] = WScope;
+ // History contains relevant DBG_VALUE instructions for Var and instructions
+ // clobbering it.
+ SmallVectorImpl<const MachineInstr*> &History = DbgValues[Var];
+ if (History.empty())
+ continue;
+ const MachineInstr *MInsn = History.front();
- return WScope;
-}
+ DIVariable DV(Var);
+ LexicalScope *Scope = NULL;
+ if (DV.getTag() == dwarf::DW_TAG_arg_variable &&
+ DISubprogram(DV.getContext()).describes(MF->getFunction()))
+ Scope = LScopes.getCurrentFunctionScope();
+ else {
+ if (DV.getVersion() <= LLVMDebugVersion9)
+ Scope = LScopes.findLexicalScope(MInsn->getDebugLoc());
+ else {
+ if (MDNode *IA = DV.getInlinedAt())
+ Scope = LScopes.findInlinedScope(DebugLoc::getFromDILocation(IA));
+ else
+ Scope = LScopes.findLexicalScope(cast<MDNode>(DV->getOperand(1)));
+ }
+ }
+ // If variable scope is not found then skip this variable.
+ if (!Scope)
+ continue;
-/// hasValidLocation - Return true if debug location entry attached with
-/// machine instruction encodes valid location info.
-static bool hasValidLocation(LLVMContext &Ctx,
- const MachineInstr *MInsn,
- const MDNode *&Scope, const MDNode *&InlinedAt) {
- DebugLoc DL = MInsn->getDebugLoc();
- if (DL.isUnknown()) return false;
+ Processed.insert(DV);
+ assert(MInsn->isDebugValue() && "History must begin with debug value");
+ DbgVariable *AbsVar = findAbstractVariable(DV, MInsn->getDebugLoc());
+ DbgVariable *RegVar = new DbgVariable(DV, AbsVar);
+ if (!addCurrentFnArgument(MF, RegVar, Scope))
+ addScopeVariable(Scope, RegVar);
+ if (AbsVar)
+ AbsVar->setMInsn(MInsn);
+
+ // Simple ranges that are fully coalesced.
+ if (History.size() <= 1 || (History.size() == 2 &&
+ MInsn->isIdenticalTo(History.back()))) {
+ RegVar->setMInsn(MInsn);
+ continue;
+ }
- const MDNode *S = DL.getScope(Ctx);
+ // handle multiple DBG_VALUE instructions describing one variable.
+ RegVar->setDotDebugLocOffset(DotDebugLocEntries.size());
- // 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 (DIScope(S).isCompileUnit()) return false;
+ for (SmallVectorImpl<const MachineInstr*>::const_iterator
+ HI = History.begin(), HE = History.end(); HI != HE; ++HI) {
+ const MachineInstr *Begin = *HI;
+ assert(Begin->isDebugValue() && "Invalid History entry");
- Scope = S;
- InlinedAt = DL.getInlinedAt(Ctx);
- return true;
-}
+ // Check if DBG_VALUE is truncating a range.
+ if (Begin->getNumOperands() > 1 && Begin->getOperand(0).isReg()
+ && !Begin->getOperand(0).getReg())
+ continue;
-/// calculateDominanceGraph - Calculate dominance graph for DbgScope
-/// hierarchy.
-static void calculateDominanceGraph(DbgScope *Scope) {
- assert (Scope && "Unable to calculate scop edominance graph!");
- SmallVector<DbgScope *, 4> WorkStack;
- WorkStack.push_back(Scope);
- unsigned Counter = 0;
- while (!WorkStack.empty()) {
- DbgScope *WS = WorkStack.back();
- const SmallVector<DbgScope *, 4> &Children = WS->getScopes();
- bool visitedChildren = false;
- for (SmallVector<DbgScope *, 4>::const_iterator SI = Children.begin(),
- SE = Children.end(); SI != SE; ++SI) {
- DbgScope *ChildScope = *SI;
- if (!ChildScope->getDFSOut()) {
- WorkStack.push_back(ChildScope);
- visitedChildren = true;
- ChildScope->setDFSIn(++Counter);
- break;
+ // Compute the range for a register location.
+ const MCSymbol *FLabel = getLabelBeforeInsn(Begin);
+ const MCSymbol *SLabel = 0;
+
+ if (HI + 1 == HE)
+ // If Begin is the last instruction in History then its value is valid
+ // until the end of the function.
+ SLabel = FunctionEndSym;
+ else {
+ const MachineInstr *End = HI[1];
+ DEBUG(dbgs() << "DotDebugLoc Pair:\n"
+ << "\t" << *Begin << "\t" << *End << "\n");
+ if (End->isDebugValue())
+ SLabel = getLabelBeforeInsn(End);
+ else {
+ // End is a normal instruction clobbering the range.
+ SLabel = getLabelAfterInsn(End);
+ assert(SLabel && "Forgot label after clobber instruction");
+ ++HI;
+ }
}
+
+ // The value is valid until the next DBG_VALUE or clobber.
+ DotDebugLocEntries.push_back(getDebugLocEntry(Asm, FLabel, SLabel,
+ Begin));
}
- if (!visitedChildren) {
- WorkStack.pop_back();
- WS->setDFSOut(++Counter);
- }
+ DotDebugLocEntries.push_back(DotDebugLocEntry());
}
-}
-/// printDbgScopeInfo - Print DbgScope info for each machine instruction.
-static
-void printDbgScopeInfo(LLVMContext &Ctx, const MachineFunction *MF,
- DenseMap<const MachineInstr *, DbgScope *> &MI2ScopeMap)
-{
-#ifndef NDEBUG
- unsigned PrevDFSIn = 0;
- 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;
- const MDNode *Scope = NULL;
- const MDNode *InlinedAt = NULL;
-
- // Check if instruction has valid location information.
- if (hasValidLocation(Ctx, MInsn, Scope, InlinedAt)) {
- dbgs() << " [ ";
- if (InlinedAt)
- dbgs() << "*";
- DenseMap<const MachineInstr *, DbgScope *>::iterator DI =
- MI2ScopeMap.find(MInsn);
- if (DI != MI2ScopeMap.end()) {
- DbgScope *S = DI->second;
- dbgs() << S->getDFSIn();
- PrevDFSIn = S->getDFSIn();
- } else
- dbgs() << PrevDFSIn;
- } else
- dbgs() << " [ x" << PrevDFSIn;
- dbgs() << " ]";
- MInsn->dump();
- }
- dbgs() << "\n";
+ // Collect info for variables that were optimized out.
+ LexicalScope *FnScope = LScopes.getCurrentFunctionScope();
+ DIArray Variables = DISubprogram(FnScope->getScopeNode()).getVariables();
+ for (unsigned i = 0, e = Variables.getNumElements(); i != e; ++i) {
+ DIVariable DV(Variables.getElement(i));
+ if (!DV || !DV.Verify() || !Processed.insert(DV))
+ continue;
+ if (LexicalScope *Scope = LScopes.findLexicalScope(DV.getContext()))
+ addScopeVariable(Scope, new DbgVariable(DV, NULL));
}
-#endif
}
-/// extractScopeInformation - Scan machine instructions in this function
-/// and collect DbgScopes. Return true, if at least 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;
- // Scan each instruction and create scopes. First build working set of scopes.
- LLVMContext &Ctx = Asm->MF->getFunction()->getContext();
- SmallVector<DbgRange, 4> MIRanges;
- DenseMap<const MachineInstr *, DbgScope *> MI2ScopeMap;
- const MDNode *PrevScope = NULL;
- const MDNode *PrevInlinedAt = NULL;
- const MachineInstr *RangeBeginMI = NULL;
- const MachineInstr *PrevMI = NULL;
- for (MachineFunction::const_iterator I = Asm->MF->begin(), E = Asm->MF->end();
- I != E; ++I) {
- for (MachineBasicBlock::const_iterator II = I->begin(), IE = I->end();
- II != IE; ++II) {
- const MachineInstr *MInsn = II;
- const MDNode *Scope = NULL;
- const MDNode *InlinedAt = NULL;
-
- // Check if instruction has valid location information.
- if (!hasValidLocation(Ctx, MInsn, Scope, InlinedAt)) {
- PrevMI = MInsn;
- continue;
- }
+/// getLabelBeforeInsn - Return Label preceding the instruction.
+const MCSymbol *DwarfDebug::getLabelBeforeInsn(const MachineInstr *MI) {
+ MCSymbol *Label = LabelsBeforeInsn.lookup(MI);
+ assert(Label && "Didn't insert label before instruction");
+ return Label;
+}
- // If scope has not changed then skip this instruction.
- if (Scope == PrevScope && PrevInlinedAt == InlinedAt) {
- PrevMI = MInsn;
- continue;
- }
+/// getLabelAfterInsn - Return Label immediately following the instruction.
+const MCSymbol *DwarfDebug::getLabelAfterInsn(const MachineInstr *MI) {
+ return LabelsAfterInsn.lookup(MI);
+}
- if (RangeBeginMI) {
- // If we have alread seen a beginning of a instruction range and
- // current instruction scope does not match scope of first instruction
- // in this range then create a new instruction range.
- DbgRange R(RangeBeginMI, PrevMI);
- MI2ScopeMap[RangeBeginMI] = getOrCreateDbgScope(PrevScope,
- PrevInlinedAt);
- MIRanges.push_back(R);
+/// beginInstruction - Process beginning of an instruction.
+void DwarfDebug::beginInstruction(const MachineInstr *MI) {
+ // Check if source location changes, but ignore DBG_VALUE locations.
+ if (!MI->isDebugValue()) {
+ DebugLoc DL = MI->getDebugLoc();
+ if (DL != PrevInstLoc && (!DL.isUnknown() || UnknownLocations)) {
+ unsigned Flags = 0;
+ PrevInstLoc = DL;
+ if (DL == PrologEndLoc) {
+ Flags |= DWARF2_FLAG_PROLOGUE_END;
+ PrologEndLoc = DebugLoc();
}
+ if (PrologEndLoc.isUnknown())
+ Flags |= DWARF2_FLAG_IS_STMT;
- // This is a beginning of a new instruction range.
- RangeBeginMI = MInsn;
-
- // Reset previous markers.
- PrevMI = MInsn;
- PrevScope = Scope;
- PrevInlinedAt = InlinedAt;
+ if (!DL.isUnknown()) {
+ const MDNode *Scope = DL.getScope(Asm->MF->getFunction()->getContext());
+ recordSourceLine(DL.getLine(), DL.getCol(), Scope, Flags);
+ } else
+ recordSourceLine(0, 0, 0, 0);
}
}
- // Create last instruction range.
- if (RangeBeginMI && PrevMI && PrevScope) {
- DbgRange R(RangeBeginMI, PrevMI);
- MIRanges.push_back(R);
- MI2ScopeMap[RangeBeginMI] = getOrCreateDbgScope(PrevScope, PrevInlinedAt);
- }
+ // Insert labels where requested.
+ DenseMap<const MachineInstr*, MCSymbol*>::iterator I =
+ LabelsBeforeInsn.find(MI);
- if (!CurrentFnDbgScope)
- return false;
+ // No label needed.
+ if (I == LabelsBeforeInsn.end())
+ return;
- calculateDominanceGraph(CurrentFnDbgScope);
- if (PrintDbgScope)
- printDbgScopeInfo(Ctx, Asm->MF, MI2ScopeMap);
-
- // Find ranges of instructions covered by each DbgScope;
- DbgScope *PrevDbgScope = NULL;
- for (SmallVector<DbgRange, 4>::const_iterator RI = MIRanges.begin(),
- RE = MIRanges.end(); RI != RE; ++RI) {
- const DbgRange &R = *RI;
- DbgScope *S = MI2ScopeMap.lookup(R.first);
- assert (S && "Lost DbgScope for a machine instruction!");
- if (PrevDbgScope && !PrevDbgScope->dominates(S))
- PrevDbgScope->closeInsnRange(S);
- S->openInsnRange(R.first);
- S->extendInsnRange(R.second);
- PrevDbgScope = S;
+ // Label already assigned.
+ if (I->second)
+ return;
+
+ if (!PrevLabel) {
+ PrevLabel = MMI->getContext().CreateTempSymbol();
+ Asm->OutStreamer.EmitLabel(PrevLabel);
}
+ I->second = PrevLabel;
+}
- if (PrevDbgScope)
- PrevDbgScope->closeInsnRange();
+/// endInstruction - Process end of an instruction.
+void DwarfDebug::endInstruction(const MachineInstr *MI) {
+ // Don't create a new label after DBG_VALUE instructions.
+ // They don't generate code.
+ if (!MI->isDebugValue())
+ PrevLabel = 0;
- identifyScopeMarkers();
+ DenseMap<const MachineInstr*, MCSymbol*>::iterator I =
+ LabelsAfterInsn.find(MI);
+
+ // No label needed.
+ if (I == LabelsAfterInsn.end())
+ return;
- return !DbgScopeMap.empty();
+ // Label already assigned.
+ if (I->second)
+ return;
+
+ // We need a label after this instruction.
+ if (!PrevLabel) {
+ PrevLabel = MMI->getContext().CreateTempSymbol();
+ Asm->OutStreamer.EmitLabel(PrevLabel);
+ }
+ I->second = PrevLabel;
}
/// identifyScopeMarkers() -
-/// Each DbgScope 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.
+/// Each LexicalScope 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.
void DwarfDebug::identifyScopeMarkers() {
- SmallVector<DbgScope *, 4> WorkList;
- WorkList.push_back(CurrentFnDbgScope);
+ SmallVector<LexicalScope *, 4> WorkList;
+ WorkList.push_back(LScopes.getCurrentFunctionScope());
while (!WorkList.empty()) {
- DbgScope *S = WorkList.pop_back_val();
+ LexicalScope *S = WorkList.pop_back_val();
- const SmallVector<DbgScope *, 4> &Children = S->getScopes();
+ const SmallVector<LexicalScope *, 4> &Children = S->getChildren();
if (!Children.empty())
- for (SmallVector<DbgScope *, 4>::const_iterator SI = Children.begin(),
+ for (SmallVector<LexicalScope *, 4>::const_iterator SI = Children.begin(),
SE = Children.end(); SI != SE; ++SI)
WorkList.push_back(*SI);
if (S->isAbstractScope())
continue;
- const SmallVector<DbgRange, 4> &Ranges = S->getRanges();
+ const SmallVector<InsnRange, 4> &Ranges = S->getRanges();
if (Ranges.empty())
continue;
- for (SmallVector<DbgRange, 4>::const_iterator RI = Ranges.begin(),
+ for (SmallVector<InsnRange, 4>::const_iterator RI = Ranges.begin(),
RE = Ranges.end(); RI != RE; ++RI) {
- assert(RI->first && "DbgRange does not have first instruction!");
- assert(RI->second && "DbgRange does not have second instruction!");
- InsnsEndScopeSet.insert(RI->second);
+ assert(RI->first && "InsnRange does not have first instruction!");
+ assert(RI->second && "InsnRange does not have second instruction!");
+ requestLabelBeforeInsn(RI->first);
+ requestLabelAfterInsn(RI->second);
}
}
}
-/// FindFirstDebugLoc - Find the first debug location in the function. This
-/// is intended to be an approximation for the source position of the
-/// beginning of the function.
-static DebugLoc FindFirstDebugLoc(const MachineFunction *MF) {
- for (MachineFunction::const_iterator I = MF->begin(), E = MF->end();
- I != E; ++I)
- for (MachineBasicBlock::const_iterator MBBI = I->begin(), MBBE = I->end();
- MBBI != MBBE; ++MBBI) {
- DebugLoc DL = MBBI->getDebugLoc();
- if (!DL.isUnknown())
- return DL;
- }
- return DebugLoc();
+/// getScopeNode - Get MDNode for DebugLoc's scope.
+static MDNode *getScopeNode(DebugLoc DL, const LLVMContext &Ctx) {
+ if (MDNode *InlinedAt = DL.getInlinedAt(Ctx))
+ return getScopeNode(DebugLoc::getFromDILocation(InlinedAt), Ctx);
+ return DL.getScope(Ctx);
}
-#ifndef NDEBUG
-/// CheckLineNumbers - Count basicblocks whose instructions do not have any
-/// line number information.
-static void CheckLineNumbers(const MachineFunction *MF) {
- for (MachineFunction::const_iterator I = MF->begin(), E = MF->end();
- I != E; ++I) {
- bool FoundLineNo = false;
- for (MachineBasicBlock::const_iterator II = I->begin(), IE = I->end();
- II != IE; ++II) {
- const MachineInstr *MI = II;
- if (!MI->getDebugLoc().isUnknown()) {
- FoundLineNo = true;
- break;
- }
- }
- if (!FoundLineNo && I->size())
- ++BlocksWithoutLineNo;
+/// getFnDebugLoc - Walk up the scope chain of given debug loc and find
+/// line number info for the function.
+static DebugLoc getFnDebugLoc(DebugLoc DL, const LLVMContext &Ctx) {
+ const MDNode *Scope = getScopeNode(DL, Ctx);
+ DISubprogram SP = getDISubprogram(Scope);
+ if (SP.Verify()) {
+ // Check for number of operands since the compatibility is
+ // cheap here.
+ if (SP->getNumOperands() > 19)
+ return DebugLoc::get(SP.getScopeLineNumber(), 0, SP);
+ else
+ return DebugLoc::get(SP.getLineNumber(), 0, SP);
}
+
+ return DebugLoc();
}
-#endif
/// beginFunction - Gather pre-function debug information. Assumes being
/// emitted immediately after the function entry point.
void DwarfDebug::beginFunction(const MachineFunction *MF) {
if (!MMI->hasDebugInfo()) return;
- if (!extractScopeInformation()) return;
-
-#ifndef NDEBUG
- CheckLineNumbers(MF);
-#endif
+ LScopes.initialize(*MF);
+ if (LScopes.empty()) return;
+ identifyScopeMarkers();
FunctionBeginSym = Asm->GetTempSymbol("func_begin",
Asm->getFunctionNumber());
// Assumes in correct section after the entry point.
Asm->OutStreamer.EmitLabel(FunctionBeginSym);
- // Emit label for the implicitly defined dbg.stoppoint at the start of the
- // function.
- DebugLoc FDL = FindFirstDebugLoc(MF);
- if (FDL.isUnknown()) return;
-
- const MDNode *Scope = FDL.getScope(MF->getFunction()->getContext());
- const MDNode *TheScope = 0;
-
- DISubprogram SP = getDISubprogram(Scope);
- unsigned Line, Col;
- if (SP.Verify()) {
- Line = SP.getLineNumber();
- Col = 0;
- TheScope = SP;
- } else {
- Line = FDL.getLine();
- Col = FDL.getCol();
- TheScope = Scope;
- }
-
- recordSourceLine(Line, Col, TheScope);
+ assert(UserVariables.empty() && DbgValues.empty() && "Maps weren't cleaned");
- /// ProcessedArgs - Collection of arguments already processed.
- SmallPtrSet<const MDNode *, 8> ProcessedArgs;
+ const TargetRegisterInfo *TRI = Asm->TM.getRegisterInfo();
+ /// LiveUserVar - Map physreg numbers to the MDNode they contain.
+ std::vector<const MDNode*> LiveUserVar(TRI->getNumRegs());
- DebugLoc PrevLoc;
for (MachineFunction::const_iterator I = MF->begin(), E = MF->end();
- I != E; ++I)
+ I != E; ++I) {
+ bool AtBlockEntry = true;
for (MachineBasicBlock::const_iterator II = I->begin(), IE = I->end();
II != IE; ++II) {
const MachineInstr *MI = II;
- DebugLoc DL = MI->getDebugLoc();
+
if (MI->isDebugValue()) {
- assert (MI->getNumOperands() > 1 && "Invalid machine instruction!");
- DIVariable DV(MI->getOperand(MI->getNumOperands() - 1).getMetadata());
- if (!DV.Verify()) continue;
- // If DBG_VALUE is for a local variable then it needs a label.
- if (DV.getTag() != dwarf::DW_TAG_arg_variable)
- InsnNeedsLabel.insert(MI);
- // DBG_VALUE for inlined functions argument needs a label.
- else if (!DISubprogram(getDISubprogram(DV.getContext())).
- describes(MF->getFunction()))
- InsnNeedsLabel.insert(MI);
- // DBG_VALUE indicating argument location change needs a label.
- else if (!ProcessedArgs.insert(DV))
- InsnNeedsLabel.insert(MI);
+ assert(MI->getNumOperands() > 1 && "Invalid machine instruction!");
+
+ // Keep track of user variables.
+ const MDNode *Var =
+ MI->getOperand(MI->getNumOperands() - 1).getMetadata();
+
+ // Variable is in a register, we need to check for clobbers.
+ if (isDbgValueInDefinedReg(MI))
+ LiveUserVar[MI->getOperand(0).getReg()] = Var;
+
+ // Check the history of this variable.
+ SmallVectorImpl<const MachineInstr*> &History = DbgValues[Var];
+ if (History.empty()) {
+ UserVariables.push_back(Var);
+ // The first mention of a function argument gets the FunctionBeginSym
+ // label, so arguments are visible when breaking at function entry.
+ DIVariable DV(Var);
+ if (DV.Verify() && DV.getTag() == dwarf::DW_TAG_arg_variable &&
+ DISubprogram(getDISubprogram(DV.getContext()))
+ .describes(MF->getFunction()))
+ LabelsBeforeInsn[MI] = FunctionBeginSym;
+ } else {
+ // We have seen this variable before. Try to coalesce DBG_VALUEs.
+ const MachineInstr *Prev = History.back();
+ if (Prev->isDebugValue()) {
+ // Coalesce identical entries at the end of History.
+ if (History.size() >= 2 &&
+ Prev->isIdenticalTo(History[History.size() - 2])) {
+ DEBUG(dbgs() << "Coalesce identical DBG_VALUE entries:\n"
+ << "\t" << *Prev
+ << "\t" << *History[History.size() - 2] << "\n");
+ History.pop_back();
+ }
+
+ // Terminate old register assignments that don't reach MI;
+ MachineFunction::const_iterator PrevMBB = Prev->getParent();
+ if (PrevMBB != I && (!AtBlockEntry || llvm::next(PrevMBB) != I) &&
+ isDbgValueInDefinedReg(Prev)) {
+ // Previous register assignment needs to terminate at the end of
+ // its basic block.
+ MachineBasicBlock::const_iterator LastMI =
+ PrevMBB->getLastNonDebugInstr();
+ if (LastMI == PrevMBB->end()) {
+ // Drop DBG_VALUE for empty range.
+ DEBUG(dbgs() << "Drop DBG_VALUE for empty range:\n"
+ << "\t" << *Prev << "\n");
+ History.pop_back();
+ }
+ else {
+ // Terminate after LastMI.
+ History.push_back(LastMI);
+ }
+ }
+ }
+ }
+ History.push_back(MI);
} else {
- // If location is unknown then instruction needs a location only if
- // UnknownLocations flag is set.
- if (DL.isUnknown()) {
- if (UnknownLocations && !PrevLoc.isUnknown())
- InsnNeedsLabel.insert(MI);
- } else if (DL != PrevLoc)
- // Otherwise, instruction needs a location only if it is new location.
- InsnNeedsLabel.insert(MI);
+ // Not a DBG_VALUE instruction.
+ if (!MI->isLabel())
+ AtBlockEntry = false;
+
+ // First known non DBG_VALUE location marks beginning of function
+ // body.
+ if (PrologEndLoc.isUnknown() && !MI->getDebugLoc().isUnknown())
+ PrologEndLoc = MI->getDebugLoc();
+
+ // Check if the instruction clobbers any registers with debug vars.
+ for (MachineInstr::const_mop_iterator MOI = MI->operands_begin(),
+ MOE = MI->operands_end(); MOI != MOE; ++MOI) {
+ if (!MOI->isReg() || !MOI->isDef() || !MOI->getReg())
+ continue;
+ for (MCRegAliasIterator AI(MOI->getReg(), TRI, true);
+ AI.isValid(); ++AI) {
+ unsigned Reg = *AI;
+ const MDNode *Var = LiveUserVar[Reg];
+ if (!Var)
+ continue;
+ // Reg is now clobbered.
+ LiveUserVar[Reg] = 0;
+
+ // Was MD last defined by a DBG_VALUE referring to Reg?
+ DbgValueHistoryMap::iterator HistI = DbgValues.find(Var);
+ if (HistI == DbgValues.end())
+ continue;
+ SmallVectorImpl<const MachineInstr*> &History = HistI->second;
+ if (History.empty())
+ continue;
+ const MachineInstr *Prev = History.back();
+ // Sanity-check: Register assignments are terminated at the end of
+ // their block.
+ if (!Prev->isDebugValue() || Prev->getParent() != MI->getParent())
+ continue;
+ // Is the variable still in Reg?
+ if (!isDbgValueInDefinedReg(Prev) ||
+ Prev->getOperand(0).getReg() != Reg)
+ continue;
+ // Var is clobbered. Make sure the next instruction gets a label.
+ History.push_back(MI);
+ }
+ }
}
+ }
+ }
+
+ for (DbgValueHistoryMap::iterator I = DbgValues.begin(), E = DbgValues.end();
+ I != E; ++I) {
+ SmallVectorImpl<const MachineInstr*> &History = I->second;
+ if (History.empty())
+ continue;
- if (!DL.isUnknown() || UnknownLocations)
- PrevLoc = DL;
+ // Make sure the final register assignments are terminated.
+ const MachineInstr *Prev = History.back();
+ if (Prev->isDebugValue() && isDbgValueInDefinedReg(Prev)) {
+ const MachineBasicBlock *PrevMBB = Prev->getParent();
+ MachineBasicBlock::const_iterator LastMI =
+ PrevMBB->getLastNonDebugInstr();
+ if (LastMI == PrevMBB->end())
+ // Drop DBG_VALUE for empty range.
+ History.pop_back();
+ else {
+ // Terminate after LastMI.
+ History.push_back(LastMI);
+ }
+ }
+ // Request labels for the full history.
+ for (unsigned i = 0, e = History.size(); i != e; ++i) {
+ const MachineInstr *MI = History[i];
+ if (MI->isDebugValue())
+ requestLabelBeforeInsn(MI);
+ else
+ requestLabelAfterInsn(MI);
}
+ }
+ PrevInstLoc = DebugLoc();
PrevLabel = FunctionBeginSym;
+
+ // Record beginning of function.
+ if (!PrologEndLoc.isUnknown()) {
+ DebugLoc FnStartDL = getFnDebugLoc(PrologEndLoc,
+ MF->getFunction()->getContext());
+ recordSourceLine(FnStartDL.getLine(), FnStartDL.getCol(),
+ FnStartDL.getScope(MF->getFunction()->getContext()),
+ 0);
+ }
+}
+
+void DwarfDebug::addScopeVariable(LexicalScope *LS, DbgVariable *Var) {
+// SmallVector<DbgVariable *, 8> &Vars = ScopeVariables.lookup(LS);
+ ScopeVariables[LS].push_back(Var);
+// Vars.push_back(Var);
}
/// endFunction - Gather and emit post-function debug information.
///
void DwarfDebug::endFunction(const MachineFunction *MF) {
- if (!MMI->hasDebugInfo() || DbgScopeMap.empty()) return;
+ if (!MMI->hasDebugInfo() || LScopes.empty()) return;
- if (CurrentFnDbgScope) {
-
- // Define end label for subprogram.
- FunctionEndSym = Asm->GetTempSymbol("func_end",
- Asm->getFunctionNumber());
- // Assumes in correct section after the entry point.
- Asm->OutStreamer.EmitLabel(FunctionEndSym);
-
- SmallPtrSet<const MDNode *, 16> ProcessedVars;
- collectVariableInfo(MF, ProcessedVars);
-
- // Construct abstract scopes.
- for (SmallVector<DbgScope *, 4>::iterator AI = AbstractScopesList.begin(),
- AE = AbstractScopesList.end(); AI != AE; ++AI) {
- DISubprogram SP((*AI)->getScopeNode());
- if (SP.Verify()) {
- // Collect info for variables that were optimized out.
- StringRef FName = SP.getLinkageName();
- if (FName.empty())
- FName = SP.getName();
- if (NamedMDNode *NMD =
- getFnSpecificMDNode(*(MF->getFunction()->getParent()), FName)) {
- for (unsigned i = 0, e = NMD->getNumOperands(); i != e; ++i) {
- DIVariable DV(cast<MDNode>(NMD->getOperand(i)));
- if (!DV || !ProcessedVars.insert(DV))
- continue;
- DbgScope *Scope = AbstractScopes.lookup(DV.getContext());
- if (Scope)
- Scope->addVariable(new DbgVariable(DV));
- }
- }
+ // Define end label for subprogram.
+ FunctionEndSym = Asm->GetTempSymbol("func_end",
+ Asm->getFunctionNumber());
+ // Assumes in correct section after the entry point.
+ Asm->OutStreamer.EmitLabel(FunctionEndSym);
+
+ SmallPtrSet<const MDNode *, 16> ProcessedVars;
+ collectVariableInfo(MF, ProcessedVars);
+
+ LexicalScope *FnScope = LScopes.getCurrentFunctionScope();
+ CompileUnit *TheCU = SPMap.lookup(FnScope->getScopeNode());
+ assert(TheCU && "Unable to find compile unit!");
+
+ // Construct abstract scopes.
+ ArrayRef<LexicalScope *> AList = LScopes.getAbstractScopesList();
+ for (unsigned i = 0, e = AList.size(); i != e; ++i) {
+ LexicalScope *AScope = AList[i];
+ DISubprogram SP(AScope->getScopeNode());
+ if (SP.Verify()) {
+ // Collect info for variables that were optimized out.
+ DIArray Variables = SP.getVariables();
+ for (unsigned i = 0, e = Variables.getNumElements(); i != e; ++i) {
+ DIVariable DV(Variables.getElement(i));
+ if (!DV || !DV.Verify() || !ProcessedVars.insert(DV))
+ continue;
+ if (LexicalScope *Scope = LScopes.findAbstractScope(DV.getContext()))
+ addScopeVariable(Scope, new DbgVariable(DV, NULL));
}
- if (ProcessedSPNodes.count((*AI)->getScopeNode()) == 0)
- constructScopeDIE(*AI);
}
-
- DIE *CurFnDIE = constructScopeDIE(CurrentFnDbgScope);
-
- if (!DisableFramePointerElim(*MF))
- addUInt(CurFnDIE, dwarf::DW_AT_APPLE_omit_frame_ptr,
- dwarf::DW_FORM_flag, 1);
-
-
- DebugFrames.push_back(FunctionDebugFrameInfo(Asm->getFunctionNumber(),
- MMI->getFrameMoves()));
+ if (ProcessedSPNodes.count(AScope->getScopeNode()) == 0)
+ constructScopeDIE(TheCU, AScope);
}
+
+ DIE *CurFnDIE = constructScopeDIE(TheCU, FnScope);
+
+ if (!MF->getTarget().Options.DisableFramePointerElim(*MF))
+ TheCU->addUInt(CurFnDIE, dwarf::DW_AT_APPLE_omit_frame_ptr,
+ dwarf::DW_FORM_flag, 1);
+
+ DebugFrames.push_back(FunctionDebugFrameInfo(Asm->getFunctionNumber(),
+ MMI->getFrameMoves()));
// Clear debug info
- CurrentFnDbgScope = NULL;
- InsnNeedsLabel.clear();
- DbgVariableToFrameIndexMap.clear();
- VarToAbstractVarMap.clear();
- DbgVariableToDbgInstMap.clear();
- DeleteContainerSeconds(DbgScopeMap);
- InsnsEndScopeSet.clear();
- ConcreteScopes.clear();
- DeleteContainerSeconds(AbstractScopes);
- AbstractScopesList.clear();
+ for (DenseMap<LexicalScope *, SmallVector<DbgVariable *, 8> >::iterator
+ I = ScopeVariables.begin(), E = ScopeVariables.end(); I != E; ++I)
+ DeleteContainerPointers(I->second);
+ ScopeVariables.clear();
+ DeleteContainerPointers(CurrentFnArguments);
+ UserVariables.clear();
+ DbgValues.clear();
AbstractVariables.clear();
LabelsBeforeInsn.clear();
LabelsAfterInsn.clear();
PrevLabel = NULL;
}
-/// recordVariableFrameIndex - Record a variable's index.
-void DwarfDebug::recordVariableFrameIndex(const DbgVariable *V, int Index) {
- assert (V && "Invalid DbgVariable!");
- DbgVariableToFrameIndexMap[V] = Index;
-}
-
-/// findVariableFrameIndex - Return true if frame index for the variable
-/// is found. Update FI to hold value of the index.
-bool DwarfDebug::findVariableFrameIndex(const DbgVariable *V, int *FI) {
- assert (V && "Invalid DbgVariable!");
- DenseMap<const DbgVariable *, int>::iterator I =
- DbgVariableToFrameIndexMap.find(V);
- if (I == DbgVariableToFrameIndexMap.end())
- return false;
- *FI = I->second;
- return true;
-}
-
-/// findDbgScope - Find DbgScope for the debug loc attached with an
-/// instruction.
-DbgScope *DwarfDebug::findDbgScope(const MachineInstr *MInsn) {
- DbgScope *Scope = NULL;
- LLVMContext &Ctx =
- MInsn->getParent()->getParent()->getFunction()->getContext();
- DebugLoc DL = MInsn->getDebugLoc();
-
- if (DL.isUnknown())
- return Scope;
-
- if (const MDNode *IA = DL.getInlinedAt(Ctx))
- Scope = ConcreteScopes.lookup(IA);
- if (Scope == 0)
- Scope = DbgScopeMap.lookup(DL.getScope(Ctx));
-
- return Scope;
-}
-
-
/// recordSourceLine - Register a source line with debug info. Returns the
/// unique label that was emitted and which provides correspondence to
/// the source line list.
-MCSymbol *DwarfDebug::recordSourceLine(unsigned Line, unsigned Col,
- const MDNode *S) {
+void DwarfDebug::recordSourceLine(unsigned Line, unsigned Col, const MDNode *S,
+ unsigned Flags) {
StringRef Fn;
-
+ StringRef Dir;
unsigned Src = 1;
if (S) {
DIDescriptor Scope(S);
if (Scope.isCompileUnit()) {
DICompileUnit CU(S);
Fn = CU.getFilename();
+ Dir = CU.getDirectory();
} else if (Scope.isFile()) {
DIFile F(S);
Fn = F.getFilename();
+ Dir = F.getDirectory();
} else if (Scope.isSubprogram()) {
DISubprogram SP(S);
Fn = SP.getFilename();
+ Dir = SP.getDirectory();
+ } else if (Scope.isLexicalBlockFile()) {
+ DILexicalBlockFile DBF(S);
+ Fn = DBF.getFilename();
+ Dir = DBF.getDirectory();
} else if (Scope.isLexicalBlock()) {
DILexicalBlock DB(S);
Fn = DB.getFilename();
+ Dir = DB.getDirectory();
} else
- assert(0 && "Unexpected scope info");
+ llvm_unreachable("Unexpected scope info");
- Src = GetOrCreateSourceID(Fn);
+ Src = GetOrCreateSourceID(Fn, Dir);
}
-
- Asm->OutStreamer.EmitDwarfLocDirective(Src, Line, Col, DWARF2_FLAG_IS_STMT,
- 0, 0);
-
- MCSymbol *Label = MMI->getContext().CreateTempSymbol();
- Asm->OutStreamer.EmitLabel(Label);
- return Label;
+ Asm->OutStreamer.EmitDwarfLocDirective(Src, Line, Col, Flags, 0, 0, Fn);
}
//===----------------------------------------------------------------------===//
// 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(DIEValueAllocator);
-
// Record the abbreviation.
assignAbbrevNumber(Die->getAbbrev());
/// computeSizeAndOffsets - Compute the size and offset of all the DIEs.
///
void DwarfDebug::computeSizeAndOffsets() {
- unsigned PrevOffset = 0;
for (DenseMap<const MDNode *, CompileUnit *>::iterator I = CUMap.begin(),
E = CUMap.end(); I != E; ++I) {
// Compute size of compile unit header.
- static unsigned Offset = PrevOffset +
+ 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(I->second->getCUDie(), Offset, true);
- PrevOffset = Offset;
}
}
-/// EmitSectionSym - Switch to the specified MCSection and emit an assembler
-/// temporary label to it if SymbolStem is specified.
-static MCSymbol *EmitSectionSym(AsmPrinter *Asm, const MCSection *Section,
- const char *SymbolStem = 0) {
- Asm->OutStreamer.SwitchSection(Section);
- if (!SymbolStem) return 0;
-
- MCSymbol *TmpSym = Asm->GetTempSymbol(SymbolStem);
- Asm->OutStreamer.EmitLabel(TmpSym);
- return TmpSym;
-}
-
/// EmitSectionLabels - Emit initial Dwarf sections with a label at
/// the start of each one.
void DwarfDebug::EmitSectionLabels() {
const TargetLoweringObjectFile &TLOF = Asm->getObjFileLowering();
// Dwarf sections base addresses.
- if (Asm->MAI->doesDwarfRequireFrameSection()) {
- DwarfFrameSectionSym =
- EmitSectionSym(Asm, TLOF.getDwarfFrameSection(), "section_debug_frame");
- }
-
DwarfInfoSectionSym =
EmitSectionSym(Asm, TLOF.getDwarfInfoSection(), "section_info");
DwarfAbbrevSectionSym =
EmitSectionSym(Asm, TLOF.getDwarfLineSection(), "section_line");
EmitSectionSym(Asm, TLOF.getDwarfLocSection());
- EmitSectionSym(Asm, TLOF.getDwarfPubNamesSection());
EmitSectionSym(Asm, TLOF.getDwarfPubTypesSection());
DwarfStrSectionSym =
EmitSectionSym(Asm, TLOF.getDwarfStrSection(), "section_str");
EmitSectionSym(Asm, TLOF.getDataSection());
}
-/// emitDIE - Recusively Emits a debug information entry.
+/// emitDIE - Recursively emits a debug information entry.
///
void DwarfDebug::emitDIE(DIE *Die) {
// Get the abbreviation for this DIE.
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();
// DW_AT_range Value encodes offset in debug_range section.
DIEInteger *V = cast<DIEInteger>(Values[i]);
- if (Asm->MAI->doesDwarfUsesLabelOffsetForRanges()) {
+ if (Asm->MAI->doesDwarfUseLabelOffsetForRanges()) {
Asm->EmitLabelPlusOffset(DwarfDebugRangeSectionSym,
V->getValue(),
4);
break;
}
case dwarf::DW_AT_location: {
- if (UseDotDebugLocEntry.count(Die) != 0) {
- DIELabel *L = cast<DIELabel>(Values[i]);
+ if (DIELabel *L = dyn_cast<DIELabel>(Values[i]))
Asm->EmitLabelDifference(L->getValue(), DwarfDebugLocSectionSym, 4);
- } else
+ else
Values[i]->EmitValue(Asm, Form);
break;
}
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.
+ sizeof(int8_t); // Pointer Size (in bytes)
Asm->OutStreamer.AddComment("Length of Compilation Unit Info");
Asm->EmitInt32(ContentSize);
Asm->EmitInt8(Asm->getTargetData().getPointerSize());
emitDIE(Die);
- // FIXME - extra padding for gdb bug.
- Asm->OutStreamer.AddComment("4 extra padding bytes for GDB");
- Asm->EmitInt8(0);
- Asm->EmitInt8(0);
- Asm->EmitInt8(0);
- Asm->EmitInt8(0);
Asm->OutStreamer.EmitLabel(Asm->GetTempSymbol("info_end", TheCU->getID()));
}
}
Asm->EmitInt8(1);
}
-/// emitCommonDebugFrame - Emit common frame info into a debug frame section.
-///
-void DwarfDebug::emitCommonDebugFrame() {
- if (!Asm->MAI->doesDwarfRequireFrameSection())
- return;
-
- int stackGrowth = Asm->getTargetData().getPointerSize();
- if (Asm->TM.getFrameLowering()->getStackGrowthDirection() ==
- TargetFrameLowering::StackGrowsDown)
- stackGrowth *= -1;
-
- // Start the dwarf frame section.
- Asm->OutStreamer.SwitchSection(
- Asm->getObjFileLowering().getDwarfFrameSection());
-
- Asm->OutStreamer.EmitLabel(Asm->GetTempSymbol("debug_frame_common"));
- Asm->OutStreamer.AddComment("Length of Common Information Entry");
- Asm->EmitLabelDifference(Asm->GetTempSymbol("debug_frame_common_end"),
- Asm->GetTempSymbol("debug_frame_common_begin"), 4);
-
- Asm->OutStreamer.EmitLabel(Asm->GetTempSymbol("debug_frame_common_begin"));
- Asm->OutStreamer.AddComment("CIE Identifier Tag");
- Asm->EmitInt32((int)dwarf::DW_CIE_ID);
- Asm->OutStreamer.AddComment("CIE Version");
- Asm->EmitInt8(dwarf::DW_CIE_VERSION);
- Asm->OutStreamer.AddComment("CIE Augmentation");
- Asm->OutStreamer.EmitIntValue(0, 1, /*addrspace*/0); // nul terminator.
- Asm->EmitULEB128(1, "CIE Code Alignment Factor");
- Asm->EmitSLEB128(stackGrowth, "CIE Data Alignment Factor");
- Asm->OutStreamer.AddComment("CIE RA Column");
- const TargetRegisterInfo *RI = Asm->TM.getRegisterInfo();
- const TargetFrameLowering *TFI = Asm->TM.getFrameLowering();
- Asm->EmitInt8(RI->getDwarfRegNum(RI->getRARegister(), false));
-
- std::vector<MachineMove> Moves;
- TFI->getInitialFrameState(Moves);
-
- Asm->EmitFrameMoves(Moves, 0, false);
-
- Asm->EmitAlignment(2);
- Asm->OutStreamer.EmitLabel(Asm->GetTempSymbol("debug_frame_common_end"));
-}
-
-/// emitFunctionDebugFrame - Emit per function frame info into a debug frame
+/// emitAccelNames - Emit visible names into a hashed accelerator table
/// section.
-void DwarfDebug::
-emitFunctionDebugFrame(const FunctionDebugFrameInfo &DebugFrameInfo) {
- if (!Asm->MAI->doesDwarfRequireFrameSection())
- return;
+void DwarfDebug::emitAccelNames() {
+ DwarfAccelTable AT(DwarfAccelTable::Atom(DwarfAccelTable::eAtomTypeDIEOffset,
+ dwarf::DW_FORM_data4));
+ for (DenseMap<const MDNode *, CompileUnit *>::iterator I = CUMap.begin(),
+ E = CUMap.end(); I != E; ++I) {
+ CompileUnit *TheCU = I->second;
+ const StringMap<std::vector<DIE*> > &Names = TheCU->getAccelNames();
+ for (StringMap<std::vector<DIE*> >::const_iterator
+ GI = Names.begin(), GE = Names.end(); GI != GE; ++GI) {
+ const char *Name = GI->getKeyData();
+ const std::vector<DIE *> &Entities = GI->second;
+ for (std::vector<DIE *>::const_iterator DI = Entities.begin(),
+ DE = Entities.end(); DI != DE; ++DI)
+ AT.AddName(Name, (*DI));
+ }
+ }
- // Start the dwarf frame section.
+ AT.FinalizeTable(Asm, "Names");
Asm->OutStreamer.SwitchSection(
- Asm->getObjFileLowering().getDwarfFrameSection());
-
- Asm->OutStreamer.AddComment("Length of Frame Information Entry");
- MCSymbol *DebugFrameBegin =
- Asm->GetTempSymbol("debug_frame_begin", DebugFrameInfo.Number);
- MCSymbol *DebugFrameEnd =
- Asm->GetTempSymbol("debug_frame_end", DebugFrameInfo.Number);
- Asm->EmitLabelDifference(DebugFrameEnd, DebugFrameBegin, 4);
-
- Asm->OutStreamer.EmitLabel(DebugFrameBegin);
+ Asm->getObjFileLowering().getDwarfAccelNamesSection());
+ MCSymbol *SectionBegin = Asm->GetTempSymbol("names_begin");
+ Asm->OutStreamer.EmitLabel(SectionBegin);
- Asm->OutStreamer.AddComment("FDE CIE offset");
- Asm->EmitSectionOffset(Asm->GetTempSymbol("debug_frame_common"),
- DwarfFrameSectionSym);
-
- Asm->OutStreamer.AddComment("FDE initial location");
- MCSymbol *FuncBeginSym =
- Asm->GetTempSymbol("func_begin", DebugFrameInfo.Number);
- Asm->OutStreamer.EmitSymbolValue(FuncBeginSym,
- Asm->getTargetData().getPointerSize(),
- 0/*AddrSpace*/);
-
-
- Asm->OutStreamer.AddComment("FDE address range");
- Asm->EmitLabelDifference(Asm->GetTempSymbol("func_end",DebugFrameInfo.Number),
- FuncBeginSym, Asm->getTargetData().getPointerSize());
-
- Asm->EmitFrameMoves(DebugFrameInfo.Moves, FuncBeginSym, false);
-
- Asm->EmitAlignment(2);
- Asm->OutStreamer.EmitLabel(DebugFrameEnd);
+ // Emit the full data.
+ AT.Emit(Asm, SectionBegin, this);
}
-/// emitDebugPubNames - Emit visible names into a debug pubnames section.
-///
-void DwarfDebug::emitDebugPubNames() {
+/// emitAccelObjC - Emit objective C classes and categories into a hashed
+/// accelerator table section.
+void DwarfDebug::emitAccelObjC() {
+ DwarfAccelTable AT(DwarfAccelTable::Atom(DwarfAccelTable::eAtomTypeDIEOffset,
+ dwarf::DW_FORM_data4));
for (DenseMap<const MDNode *, CompileUnit *>::iterator I = CUMap.begin(),
E = CUMap.end(); I != E; ++I) {
CompileUnit *TheCU = I->second;
- // Start the dwarf pubnames section.
- Asm->OutStreamer.SwitchSection(
- Asm->getObjFileLowering().getDwarfPubNamesSection());
+ const StringMap<std::vector<DIE*> > &Names = TheCU->getAccelObjC();
+ for (StringMap<std::vector<DIE*> >::const_iterator
+ GI = Names.begin(), GE = Names.end(); GI != GE; ++GI) {
+ const char *Name = GI->getKeyData();
+ const std::vector<DIE *> &Entities = GI->second;
+ for (std::vector<DIE *>::const_iterator DI = Entities.begin(),
+ DE = Entities.end(); DI != DE; ++DI)
+ AT.AddName(Name, (*DI));
+ }
+ }
- Asm->OutStreamer.AddComment("Length of Public Names Info");
- Asm->EmitLabelDifference(
- Asm->GetTempSymbol("pubnames_end", TheCU->getID()),
- Asm->GetTempSymbol("pubnames_begin", TheCU->getID()), 4);
+ AT.FinalizeTable(Asm, "ObjC");
+ Asm->OutStreamer.SwitchSection(Asm->getObjFileLowering()
+ .getDwarfAccelObjCSection());
+ MCSymbol *SectionBegin = Asm->GetTempSymbol("objc_begin");
+ Asm->OutStreamer.EmitLabel(SectionBegin);
- Asm->OutStreamer.EmitLabel(Asm->GetTempSymbol("pubnames_begin",
- TheCU->getID()));
+ // Emit the full data.
+ AT.Emit(Asm, SectionBegin, this);
+}
- Asm->OutStreamer.AddComment("DWARF Version");
- Asm->EmitInt16(dwarf::DWARF_VERSION);
+/// emitAccelNamespace - Emit namespace dies into a hashed accelerator
+/// table.
+void DwarfDebug::emitAccelNamespaces() {
+ DwarfAccelTable AT(DwarfAccelTable::Atom(DwarfAccelTable::eAtomTypeDIEOffset,
+ dwarf::DW_FORM_data4));
+ for (DenseMap<const MDNode *, CompileUnit *>::iterator I = CUMap.begin(),
+ E = CUMap.end(); I != E; ++I) {
+ CompileUnit *TheCU = I->second;
+ const StringMap<std::vector<DIE*> > &Names = TheCU->getAccelNamespace();
+ for (StringMap<std::vector<DIE*> >::const_iterator
+ GI = Names.begin(), GE = Names.end(); GI != GE; ++GI) {
+ const char *Name = GI->getKeyData();
+ const std::vector<DIE *> &Entities = GI->second;
+ for (std::vector<DIE *>::const_iterator DI = Entities.begin(),
+ DE = Entities.end(); DI != DE; ++DI)
+ AT.AddName(Name, (*DI));
+ }
+ }
- Asm->OutStreamer.AddComment("Offset of Compilation Unit Info");
- Asm->EmitSectionOffset(Asm->GetTempSymbol("info_begin", TheCU->getID()),
- DwarfInfoSectionSym);
+ AT.FinalizeTable(Asm, "namespac");
+ Asm->OutStreamer.SwitchSection(Asm->getObjFileLowering()
+ .getDwarfAccelNamespaceSection());
+ MCSymbol *SectionBegin = Asm->GetTempSymbol("namespac_begin");
+ Asm->OutStreamer.EmitLabel(SectionBegin);
- Asm->OutStreamer.AddComment("Compilation Unit Length");
- Asm->EmitLabelDifference(Asm->GetTempSymbol("info_end", TheCU->getID()),
- Asm->GetTempSymbol("info_begin", TheCU->getID()),
- 4);
+ // Emit the full data.
+ AT.Emit(Asm, SectionBegin, this);
+}
- const StringMap<DIE*> &Globals = TheCU->getGlobals();
- for (StringMap<DIE*>::const_iterator
- GI = Globals.begin(), GE = Globals.end(); GI != GE; ++GI) {
+/// emitAccelTypes() - Emit type dies into a hashed accelerator table.
+void DwarfDebug::emitAccelTypes() {
+ std::vector<DwarfAccelTable::Atom> Atoms;
+ Atoms.push_back(DwarfAccelTable::Atom(DwarfAccelTable::eAtomTypeDIEOffset,
+ dwarf::DW_FORM_data4));
+ Atoms.push_back(DwarfAccelTable::Atom(DwarfAccelTable::eAtomTypeTag,
+ dwarf::DW_FORM_data2));
+ Atoms.push_back(DwarfAccelTable::Atom(DwarfAccelTable::eAtomTypeTypeFlags,
+ dwarf::DW_FORM_data1));
+ DwarfAccelTable AT(Atoms);
+ for (DenseMap<const MDNode *, CompileUnit *>::iterator I = CUMap.begin(),
+ E = CUMap.end(); I != E; ++I) {
+ CompileUnit *TheCU = I->second;
+ const StringMap<std::vector<std::pair<DIE*, unsigned > > > &Names
+ = TheCU->getAccelTypes();
+ for (StringMap<std::vector<std::pair<DIE*, unsigned> > >::const_iterator
+ GI = Names.begin(), GE = Names.end(); GI != GE; ++GI) {
const char *Name = GI->getKeyData();
- DIE *Entity = GI->second;
-
- Asm->OutStreamer.AddComment("DIE offset");
- Asm->EmitInt32(Entity->getOffset());
-
- if (Asm->isVerbose())
- Asm->OutStreamer.AddComment("External Name");
- Asm->OutStreamer.EmitBytes(StringRef(Name, strlen(Name)+1), 0);
+ const std::vector<std::pair<DIE *, unsigned> > &Entities = GI->second;
+ for (std::vector<std::pair<DIE *, unsigned> >::const_iterator DI
+ = Entities.begin(), DE = Entities.end(); DI !=DE; ++DI)
+ AT.AddName(Name, (*DI).first, (*DI).second);
}
-
- Asm->OutStreamer.AddComment("End Mark");
- Asm->EmitInt32(0);
- Asm->OutStreamer.EmitLabel(Asm->GetTempSymbol("pubnames_end",
- TheCU->getID()));
}
+
+ AT.FinalizeTable(Asm, "types");
+ Asm->OutStreamer.SwitchSection(Asm->getObjFileLowering()
+ .getDwarfAccelTypesSection());
+ MCSymbol *SectionBegin = Asm->GetTempSymbol("types_begin");
+ Asm->OutStreamer.EmitLabel(SectionBegin);
+
+ // Emit the full data.
+ AT.Emit(Asm, SectionBegin, this);
}
void DwarfDebug::emitDebugPubTypes() {
for (DenseMap<const MDNode *, CompileUnit *>::iterator I = CUMap.begin(),
E = CUMap.end(); I != E; ++I) {
CompileUnit *TheCU = I->second;
- // Start the dwarf pubnames section.
+ // Start the dwarf pubtypes section.
Asm->OutStreamer.SwitchSection(
Asm->getObjFileLowering().getDwarfPubTypesSection());
Asm->OutStreamer.AddComment("Length of Public Types Info");
for (StringMap<DIE*>::const_iterator
GI = Globals.begin(), GE = Globals.end(); GI != GE; ++GI) {
const char *Name = GI->getKeyData();
- DIE * Entity = GI->second;
+ DIE *Entity = GI->second;
if (Asm->isVerbose()) Asm->OutStreamer.AddComment("DIE offset");
Asm->EmitInt32(Entity->getOffset());
if (Asm->isVerbose()) Asm->OutStreamer.AddComment("External Name");
+ // Emit the name with a terminating null byte.
Asm->OutStreamer.EmitBytes(StringRef(Name, GI->getKeyLength()+1), 0);
}
// Emit a label for reference from debug information entries.
Asm->OutStreamer.EmitLabel(Entries[i].second->getValue().first);
- // Emit the string itself.
- Asm->OutStreamer.EmitBytes(Entries[i].second->getKey(), 0/*addrspace*/);
+ // Emit the string itself with a terminating null byte.
+ Asm->OutStreamer.EmitBytes(StringRef(Entries[i].second->getKeyData(),
+ Entries[i].second->getKeyLength()+1),
+ 0/*addrspace*/);
}
}
if (DotDebugLocEntries.empty())
return;
+ for (SmallVector<DotDebugLocEntry, 4>::iterator
+ I = DotDebugLocEntries.begin(), E = DotDebugLocEntries.end();
+ I != E; ++I) {
+ DotDebugLocEntry &Entry = *I;
+ if (I + 1 != DotDebugLocEntries.end())
+ Entry.Merge(I+1);
+ }
+
// Start the dwarf loc section.
Asm->OutStreamer.SwitchSection(
Asm->getObjFileLowering().getDwarfLocSection());
for (SmallVector<DotDebugLocEntry, 4>::iterator
I = DotDebugLocEntries.begin(), E = DotDebugLocEntries.end();
I != E; ++I, ++index) {
- DotDebugLocEntry Entry = *I;
+ DotDebugLocEntry &Entry = *I;
+ if (Entry.isMerged()) continue;
if (Entry.isEmpty()) {
Asm->OutStreamer.EmitIntValue(0, Size, /*addrspace*/0);
Asm->OutStreamer.EmitIntValue(0, Size, /*addrspace*/0);
} else {
Asm->OutStreamer.EmitSymbolValue(Entry.Begin, Size, 0);
Asm->OutStreamer.EmitSymbolValue(Entry.End, Size, 0);
- const TargetRegisterInfo *RI = Asm->TM.getRegisterInfo();
- unsigned Reg = RI->getDwarfRegNum(Entry.Loc.getReg(), false);
- if (int Offset = Entry.Loc.getOffset()) {
- // If the value is at a certain offset from frame register then
- // use DW_OP_fbreg.
- unsigned OffsetSize = Offset ? MCAsmInfo::getSLEB128Size(Offset) : 1;
- Asm->OutStreamer.AddComment("Loc expr size");
- Asm->EmitInt16(1 + OffsetSize);
- Asm->OutStreamer.AddComment(
- dwarf::OperationEncodingString(dwarf::DW_OP_fbreg));
- Asm->EmitInt8(dwarf::DW_OP_fbreg);
- Asm->OutStreamer.AddComment("Offset");
- Asm->EmitSLEB128(Offset);
- } else {
- if (Reg < 32) {
- Asm->OutStreamer.AddComment("Loc expr size");
- Asm->EmitInt16(1);
- Asm->OutStreamer.AddComment(
- dwarf::OperationEncodingString(dwarf::DW_OP_reg0 + Reg));
- Asm->EmitInt8(dwarf::DW_OP_reg0 + Reg);
+ DIVariable DV(Entry.Variable);
+ Asm->OutStreamer.AddComment("Loc expr size");
+ MCSymbol *begin = Asm->OutStreamer.getContext().CreateTempSymbol();
+ MCSymbol *end = Asm->OutStreamer.getContext().CreateTempSymbol();
+ Asm->EmitLabelDifference(end, begin, 2);
+ Asm->OutStreamer.EmitLabel(begin);
+ if (Entry.isInt()) {
+ DIBasicType BTy(DV.getType());
+ if (BTy.Verify() &&
+ (BTy.getEncoding() == dwarf::DW_ATE_signed
+ || BTy.getEncoding() == dwarf::DW_ATE_signed_char)) {
+ Asm->OutStreamer.AddComment("DW_OP_consts");
+ Asm->EmitInt8(dwarf::DW_OP_consts);
+ Asm->EmitSLEB128(Entry.getInt());
} else {
- Asm->OutStreamer.AddComment("Loc expr size");
- Asm->EmitInt16(1 + MCAsmInfo::getULEB128Size(Reg));
- Asm->EmitInt8(dwarf::DW_OP_regx);
- Asm->EmitULEB128(Reg);
+ Asm->OutStreamer.AddComment("DW_OP_constu");
+ Asm->EmitInt8(dwarf::DW_OP_constu);
+ Asm->EmitULEB128(Entry.getInt());
+ }
+ } else if (Entry.isLocation()) {
+ if (!DV.hasComplexAddress())
+ // Regular entry.
+ Asm->EmitDwarfRegOp(Entry.Loc);
+ else {
+ // Complex address entry.
+ unsigned N = DV.getNumAddrElements();
+ unsigned i = 0;
+ if (N >= 2 && DV.getAddrElement(0) == DIBuilder::OpPlus) {
+ if (Entry.Loc.getOffset()) {
+ i = 2;
+ Asm->EmitDwarfRegOp(Entry.Loc);
+ Asm->OutStreamer.AddComment("DW_OP_deref");
+ Asm->EmitInt8(dwarf::DW_OP_deref);
+ Asm->OutStreamer.AddComment("DW_OP_plus_uconst");
+ Asm->EmitInt8(dwarf::DW_OP_plus_uconst);
+ Asm->EmitSLEB128(DV.getAddrElement(1));
+ } else {
+ // If first address element is OpPlus then emit
+ // DW_OP_breg + Offset instead of DW_OP_reg + Offset.
+ MachineLocation Loc(Entry.Loc.getReg(), DV.getAddrElement(1));
+ Asm->EmitDwarfRegOp(Loc);
+ i = 2;
+ }
+ } else {
+ Asm->EmitDwarfRegOp(Entry.Loc);
+ }
+
+ // Emit remaining complex address elements.
+ for (; i < N; ++i) {
+ uint64_t Element = DV.getAddrElement(i);
+ if (Element == DIBuilder::OpPlus) {
+ Asm->EmitInt8(dwarf::DW_OP_plus_uconst);
+ Asm->EmitULEB128(DV.getAddrElement(++i));
+ } else if (Element == DIBuilder::OpDeref) {
+ if (!Entry.Loc.isReg())
+ Asm->EmitInt8(dwarf::DW_OP_deref);
+ } else
+ llvm_unreachable("unknown Opcode found in complex address");
+ }
}
}
+ // else ... ignore constant fp. There is not any good way to
+ // to represent them here in dwarf.
+ Asm->OutStreamer.EmitLabel(end);
}
}
}
/// __debug_info section, and the low_pc is the starting address for the
/// inlining instance.
void DwarfDebug::emitDebugInlineInfo() {
- if (!Asm->MAI->doesDwarfUsesInlineInfoSection())
+ if (!Asm->MAI->doesDwarfUseInlineInfoSection())
return;
if (!FirstCU)
StringRef Name = SP.getName();
Asm->OutStreamer.AddComment("MIPS linkage name");
- if (LName.empty()) {
- Asm->OutStreamer.EmitBytes(Name, 0);
- Asm->OutStreamer.EmitIntValue(0, 1, 0); // nul terminator.
- } else
+ if (LName.empty())
+ Asm->EmitSectionOffset(getStringPoolEntry(Name), DwarfStrSectionSym);
+ else
Asm->EmitSectionOffset(getStringPoolEntry(getRealLinkageName(LName)),
DwarfStrSectionSym);
projects / oota-llvm.git / blobdiff