X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=lib%2FCodeGen%2FAsmPrinter%2FDwarfDebug.cpp;h=fd2fd24331a2b16c76b6ebc9333c2d4dfda1281c;hb=55c86c67ee7ac8596c439d41b93851e7ad024c43;hp=497840e57f9b60f3e2331b6b101643ebb59c86d6;hpb=a80f2d1f976a40ce627e18e3a80e52cb1f1aecb5;p=oota-llvm.git diff --git a/lib/CodeGen/AsmPrinter/DwarfDebug.cpp b/lib/CodeGen/AsmPrinter/DwarfDebug.cpp index 497840e57f9..fd2fd24331a 100644 --- a/lib/CodeGen/AsmPrinter/DwarfDebug.cpp +++ b/lib/CodeGen/AsmPrinter/DwarfDebug.cpp @@ -17,9 +17,10 @@ #include "DwarfAccelTable.h" #include "DwarfCompileUnit.h" #include "llvm/Constants.h" +#include "llvm/DebugInfo.h" +#include "llvm/DIBuilder.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" @@ -32,11 +33,10 @@ #include "llvm/Target/TargetMachine.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/ADT/Triple.h" #include "llvm/Support/CommandLine.h" #include "llvm/Support/Debug.h" #include "llvm/Support/ErrorHandling.h" @@ -54,9 +54,29 @@ static cl::opt UnknownLocations("use-unknown-locations", cl::Hidden, cl::desc("Make an absence of debug location information explicit."), cl::init(false)); -static cl::opt DwarfAccelTables("dwarf-accel-tables", cl::Hidden, +namespace { + enum DefaultOnOff { + Default, Enable, Disable + }; +} + +static cl::opt DwarfAccelTables("dwarf-accel-tables", cl::Hidden, cl::desc("Output prototype dwarf accelerator tables."), - cl::init(false)); + cl::values( + clEnumVal(Default, "Default for platform"), + clEnumVal(Enable, "Enabled"), + clEnumVal(Disable, "Disabled"), + clEnumValEnd), + cl::init(Default)); + +static cl::opt DarwinGDBCompat("darwin-gdb-compat", cl::Hidden, + cl::desc("Compatibility with Darwin gdb."), + cl::values( + clEnumVal(Default, "Default for platform"), + clEnumVal(Enable, "Enabled"), + clEnumVal(Disable, "Disabled"), + clEnumValEnd), + cl::init(Default)); namespace { const char *DWARFGroupName = "DWARF Emission"; @@ -117,7 +137,6 @@ DIType DbgVariable::getType() const { if (getName() == DT.getName()) return (DT.getTypeDerivedFrom()); } - return Ty; } return Ty; } @@ -127,6 +146,7 @@ DIType DbgVariable::getType() const { DwarfDebug::DwarfDebug(AsmPrinter *A, Module *M) : Asm(A), MMI(Asm->MMI), FirstCU(0), AbbreviationsSet(InitAbbreviationsSetSize), + SourceIdMap(DIEValueAllocator), StringPool(DIEValueAllocator), PrevLabel(NULL) { NextStringPoolNumber = 0; @@ -135,10 +155,25 @@ DwarfDebug::DwarfDebug(AsmPrinter *A, Module *M) DwarfDebugRangeSectionSym = DwarfDebugLocSectionSym = 0; FunctionBeginSym = FunctionEndSym = 0; - // Turn on accelerator tables for Darwin. - if (Triple(M->getTargetTriple()).isOSDarwin()) - DwarfAccelTables = true; - + // Turn on accelerator tables and older gdb compatibility + // for Darwin. + bool isDarwin = Triple(M->getTargetTriple()).isOSDarwin(); + if (DarwinGDBCompat == Default) { + if (isDarwin) + isDarwinGDBCompat = true; + else + isDarwinGDBCompat = false; + } else + isDarwinGDBCompat = DarwinGDBCompat == Enable ? true : false; + + if (DwarfAccelTables == Default) { + if (isDarwin) + hasDwarfAccelTables = true; + else + hasDwarfAccelTables = false; + } else + hasDwarfAccelTables = DwarfAccelTables == Enable ? true : false; + { NamedRegionTimer T(DbgTimerName, DWARFGroupName, TimePassesIsEnabled); beginModule(M); @@ -282,7 +317,7 @@ DIE *DwarfDebug::updateSubprogramScopeDIE(CompileUnit *SPCU, if (SP.isDefinition() && !SP.getContext().isCompileUnit() && !SP.getContext().isFile() && !isSubprogramContext(SP.getContext())) { - SPCU->addUInt(SPDie, dwarf::DW_AT_declaration, dwarf::DW_FORM_flag, 1); + SPCU->addFlag(SPDie, dwarf::DW_AT_declaration); // Add arguments. DICompositeType SPTy = SP.getType(); @@ -291,10 +326,13 @@ DIE *DwarfDebug::updateSubprogramScopeDIE(CompileUnit *SPCU, 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))); + DIType ATy = DIType(Args.getElement(i)); SPCU->addType(Arg, ATy); if (ATy.isArtificial()) - SPCU->addUInt(Arg, dwarf::DW_AT_artificial, dwarf::DW_FORM_flag, 1); + SPCU->addFlag(Arg, dwarf::DW_AT_artificial); + if (ATy.isObjectPointer()) + SPCU->addDIEEntry(SPDie, dwarf::DW_AT_object_pointer, + dwarf::DW_FORM_ref4, Arg); SPDie->addChild(Arg); } DIE *SPDeclDie = SPDie; @@ -461,21 +499,26 @@ DIE *DwarfDebug::constructScopeDIE(CompileUnit *TheCU, LexicalScope *Scope) { return NULL; SmallVector Children; + DIE *ObjectPointer = NULL; // 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())) + TheCU->constructVariableDIE(ArgDV, Scope->isAbstractScope())) { Children.push_back(Arg); + if (ArgDV->isObjectPointer()) ObjectPointer = Arg; + } // Collect lexical scope children first. const SmallVector &Variables = ScopeVariables.lookup(Scope); for (unsigned i = 0, N = Variables.size(); i < N; ++i) if (DIE *Variable = - TheCU->constructVariableDIE(Variables[i], Scope->isAbstractScope())) + TheCU->constructVariableDIE(Variables[i], Scope->isAbstractScope())) { Children.push_back(Variable); + if (Variables[i]->isObjectPointer()) ObjectPointer = Variable; + } const SmallVector &Scopes = Scope->getChildren(); for (unsigned j = 0, M = Scopes.size(); j < M; ++j) if (DIE *Nested = constructScopeDIE(TheCU, Scopes[j])) @@ -509,6 +552,10 @@ DIE *DwarfDebug::constructScopeDIE(CompileUnit *TheCU, LexicalScope *Scope) { E = Children.end(); I != E; ++I) ScopeDIE->addChild(*I); + if (DS.isSubprogram() && ObjectPointer != NULL) + TheCU->addDIEEntry(ScopeDIE, dwarf::DW_AT_object_pointer, + dwarf::DW_FORM_ref4, ObjectPointer); + if (DS.isSubprogram()) TheCU->addPubTypes(DISubprogram(DS)); @@ -556,7 +603,8 @@ CompileUnit *DwarfDebug::constructCompileUnit(const MDNode *N) { unsigned ID = GetOrCreateSourceID(FN, CompilationDir); DIE *Die = new DIE(dwarf::DW_TAG_compile_unit); - CompileUnit *NewCU = new CompileUnit(ID, DIUnit.getLanguage(), Die, Asm, this); + 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()); @@ -566,7 +614,7 @@ CompileUnit *DwarfDebug::constructCompileUnit(const MDNode *N) { 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->doesDwarfRequireRelocationForSectionOffset()) + if (Asm->MAI->doesDwarfUseRelocationsAcrossSections()) NewCU->addLabel(Die, dwarf::DW_AT_stmt_list, dwarf::DW_FORM_data4, Asm->GetTempSymbol("section_line")); else @@ -575,7 +623,7 @@ CompileUnit *DwarfDebug::constructCompileUnit(const MDNode *N) { if (!CompilationDir.empty()) NewCU->addString(Die, dwarf::DW_AT_comp_dir, CompilationDir); if (DIUnit.isOptimized()) - NewCU->addUInt(Die, dwarf::DW_AT_APPLE_optimized, dwarf::DW_FORM_flag, 1); + NewCU->addFlag(Die, dwarf::DW_AT_APPLE_optimized); StringRef Flags = DIUnit.getFlags(); if (!Flags.empty()) @@ -816,8 +864,8 @@ void DwarfDebug::endModule() { // Corresponding abbreviations into a abbrev section. emitAbbreviations(); - // Emit info into a dwarf accelerator table sections. - if (DwarfAccelTables) { + // Emit info into the dwarf accelerator table sections. + if (useDwarfAccelTables()) { emitAccelNames(); emitAccelObjC(); emitAccelNamespaces(); @@ -825,7 +873,10 @@ void DwarfDebug::endModule() { } // Emit info into a debug pubtypes section. - emitDebugPubTypes(); + // TODO: When we don't need the option anymore we can + // remove all of the code that adds to the table. + if (useDarwinGDBCompat()) + emitDebugPubTypes(); // Emit info into a debug loc section. emitDebugLoc(); @@ -840,7 +891,11 @@ void DwarfDebug::endModule() { emitDebugMacInfo(); // Emit inline info. - emitDebugInlineInfo(); + // TODO: When we don't need the option anymore we + // can remove all of the code that this section + // depends upon. + if (useDarwinGDBCompat()) + emitDebugInlineInfo(); // Emit info into a debug str section. emitDebugStr(); @@ -1300,9 +1355,10 @@ void DwarfDebug::beginFunction(const MachineFunction *MF) { if (!MI->isLabel()) AtBlockEntry = false; - // First known non DBG_VALUE location marks beginning of function - // body. - if (PrologEndLoc.isUnknown() && !MI->getDebugLoc().isUnknown()) + // First known non-DBG_VALUE and non-frame setup location marks + // the beginning of the function body. + if (!MI->getFlag(MachineInstr::FrameSetup) && + (PrologEndLoc.isUnknown() && !MI->getDebugLoc().isUnknown())) PrologEndLoc = MI->getDebugLoc(); // Check if the instruction clobbers any registers with debug vars. @@ -1310,8 +1366,9 @@ void DwarfDebug::beginFunction(const MachineFunction *MF) { MOE = MI->operands_end(); MOI != MOE; ++MOI) { if (!MOI->isReg() || !MOI->isDef() || !MOI->getReg()) continue; - for (const uint16_t *AI = TRI->getOverlaps(MOI->getReg()); - unsigned Reg = *AI; ++AI) { + for (MCRegAliasIterator AI(MOI->getReg(), TRI, true); + AI.isValid(); ++AI) { + unsigned Reg = *AI; const MDNode *Var = LiveUserVar[Reg]; if (!Var) continue; @@ -1421,6 +1478,12 @@ void DwarfDebug::endFunction(const MachineFunction *MF) { DIVariable DV(Variables.getElement(i)); if (!DV || !DV.Verify() || !ProcessedVars.insert(DV)) continue; + // Check that DbgVariable for DV wasn't created earlier, when + // findAbstractVariable() was called for inlined instance of DV. + LLVMContext &Ctx = DV->getContext(); + DIVariable CleanDV = cleanseInlinedVariable(DV, Ctx); + if (AbstractVariables.lookup(CleanDV)) + continue; if (LexicalScope *Scope = LScopes.findAbstractScope(DV.getContext())) addScopeVariable(Scope, new DbgVariable(DV, NULL)); } @@ -1432,8 +1495,7 @@ void DwarfDebug::endFunction(const MachineFunction *MF) { 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); + TheCU->addFlag(CurFnDIE, dwarf::DW_AT_APPLE_omit_frame_ptr); DebugFrames.push_back(FunctionDebugFrameInfo(Asm->getFunctionNumber(), MMI->getFrameMoves())); @@ -1623,7 +1685,7 @@ void DwarfDebug::emitDIE(DIE *Die) { // DW_AT_range Value encodes offset in debug_range section. DIEInteger *V = cast(Values[i]); - if (Asm->MAI->doesDwarfUseLabelOffsetForRanges()) { + if (Asm->MAI->doesDwarfUseRelocationsAcrossSections()) { Asm->EmitLabelPlusOffset(DwarfDebugRangeSectionSym, V->getValue(), 4); @@ -1636,10 +1698,14 @@ void DwarfDebug::emitDIE(DIE *Die) { break; } case dwarf::DW_AT_location: { - if (DIELabel *L = dyn_cast(Values[i])) - Asm->EmitLabelDifference(L->getValue(), DwarfDebugLocSectionSym, 4); - else + if (DIELabel *L = dyn_cast(Values[i])) { + if (Asm->MAI->doesDwarfUseRelocationsAcrossSections()) + Asm->EmitLabelReference(L->getValue(), 4); + else + Asm->EmitLabelDifference(L->getValue(), DwarfDebugLocSectionSym, 4); + } else { Values[i]->EmitValue(Asm, Form); + } break; } case dwarf::DW_AT_accessibility: {