diff --git a/lib/CodeGen/AsmPrinter/DwarfCompileUnit.cpp b/lib/CodeGen/AsmPrinter/DwarfCompileUnit.cpp
index 44706d7647d382c6aa4dbfcb4a2cf665b32c0bb1..fe01980c812f71b68ee1305ec9ecad0fe99a57ed 100644 (file)
-//===-- llvm/CodeGen/DwarfCompileUnit.cpp - Dwarf Compile Unit ------------===//
-//
-// The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-//
-// This file contains support for constructing a dwarf compile unit.
-//
-//===----------------------------------------------------------------------===//
-
-#define DEBUG_TYPE "dwarfdebug"
-
#include "DwarfCompileUnit.h"
-#include "DwarfAccelTable.h"
-#include "DwarfDebug.h"
-#include "llvm/ADT/APFloat.h"
-#include "llvm/DIBuilder.h"
-#include "llvm/IR/Constants.h"
+
+#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/IR/DataLayout.h"
+#include "llvm/IR/GlobalValue.h"
#include "llvm/IR/GlobalVariable.h"
-#include "llvm/IR/Instructions.h"
-#include "llvm/MC/MCSection.h"
+#include "llvm/IR/Instruction.h"
+#include "llvm/MC/MCAsmInfo.h"
#include "llvm/MC/MCStreamer.h"
-#include "llvm/Target/Mangler.h"
#include "llvm/Target/TargetFrameLowering.h"
-#include "llvm/Target/TargetMachine.h"
#include "llvm/Target/TargetLoweringObjectFile.h"
+#include "llvm/Target/TargetMachine.h"
+#include "llvm/Target/TargetSubtargetInfo.h"
#include "llvm/Target/TargetRegisterInfo.h"
-using namespace llvm;
-
-/// CompileUnit - Compile unit constructor.
-CompileUnit::CompileUnit(unsigned UID, DIE *D, const MDNode *N, AsmPrinter *A,
- DwarfDebug *DW, DwarfUnits *DWU)
- : UniqueID(UID), Node(N), CUDie(D), Asm(A), DD(DW), DU(DWU), IndexTyDie(0),
- DebugInfoOffset(0) {
- DIEIntegerOne = new (DIEValueAllocator) DIEInteger(1);
- insertDIE(N, D);
-}
-
-/// ~CompileUnit - Destructor for compile unit.
-CompileUnit::~CompileUnit() {
- for (unsigned j = 0, M = DIEBlocks.size(); j < M; ++j)
- DIEBlocks[j]->~DIEBlock();
-}
-
-/// createDIEEntry - Creates a new DIEEntry to be a proxy for a debug
-/// information entry.
-DIEEntry *CompileUnit::createDIEEntry(DIE *Entry) {
- DIEEntry *Value = new (DIEValueAllocator) DIEEntry(Entry);
- return Value;
-}
-
-/// getDefaultLowerBound - Return the default lower bound for an array. If the
-/// DWARF version doesn't handle the language, return -1.
-int64_t CompileUnit::getDefaultLowerBound() const {
- switch (DICompileUnit(Node).getLanguage()) {
- default:
- break;
-
- case dwarf::DW_LANG_C89:
- case dwarf::DW_LANG_C99:
- case dwarf::DW_LANG_C:
- case dwarf::DW_LANG_C_plus_plus:
- case dwarf::DW_LANG_ObjC:
- case dwarf::DW_LANG_ObjC_plus_plus:
- return 0;
-
- case dwarf::DW_LANG_Fortran77:
- case dwarf::DW_LANG_Fortran90:
- case dwarf::DW_LANG_Fortran95:
- return 1;
-
- // The languages below have valid values only if the DWARF version >= 4.
- case dwarf::DW_LANG_Java:
- case dwarf::DW_LANG_Python:
- case dwarf::DW_LANG_UPC:
- case dwarf::DW_LANG_D:
- if (dwarf::DWARF_VERSION >= 4)
- return 0;
- break;
-
- case dwarf::DW_LANG_Ada83:
- case dwarf::DW_LANG_Ada95:
- case dwarf::DW_LANG_Cobol74:
- case dwarf::DW_LANG_Cobol85:
- case dwarf::DW_LANG_Modula2:
- case dwarf::DW_LANG_Pascal83:
- case dwarf::DW_LANG_PLI:
- if (dwarf::DWARF_VERSION >= 4)
- return 1;
- break;
- }
-
- return -1;
-}
-
-/// Check whether the DIE for this MDNode can be shared across CUs.
-static bool isShareableAcrossCUs(const MDNode *N) {
- // When the MDNode can be part of the type system, the DIE can be
- // shared across CUs.
- return DIDescriptor(N).isType() ||
- (DIDescriptor(N).isSubprogram() && !DISubprogram(N).isDefinition());
-}
+namespace llvm {
-/// getDIE - Returns the debug information entry map slot for the
-/// specified debug variable. We delegate the request to DwarfDebug
-/// when the DIE for this MDNode can be shared across CUs. The mappings
-/// will be kept in DwarfDebug for shareable DIEs.
-DIE *CompileUnit::getDIE(const MDNode *N) const {
- if (isShareableAcrossCUs(N))
- return DD->getDIE(N);
- return MDNodeToDieMap.lookup(N);
-}
-
-/// insertDIE - Insert DIE into the map. We delegate the request to DwarfDebug
-/// when the DIE for this MDNode can be shared across CUs. The mappings
-/// will be kept in DwarfDebug for shareable DIEs.
-void CompileUnit::insertDIE(const MDNode *N, DIE *D) {
- if (isShareableAcrossCUs(N)) {
- DD->insertDIE(N, D);
- return;
- }
- MDNodeToDieMap.insert(std::make_pair(N, D));
-}
-
-/// addFlag - Add a flag that is true.
-void CompileUnit::addFlag(DIE *Die, dwarf::Attribute Attribute) {
- if (DD->getDwarfVersion() >= 4)
- Die->addValue(Attribute, dwarf::DW_FORM_flag_present, DIEIntegerOne);
- else
- Die->addValue(Attribute, dwarf::DW_FORM_flag, DIEIntegerOne);
-}
-
-/// addUInt - Add an unsigned integer attribute data and value.
-///
-void CompileUnit::addUInt(DIE *Die, dwarf::Attribute Attribute,
- Optional<dwarf::Form> 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);
-}
-
-void CompileUnit::addUInt(DIEBlock *Block, dwarf::Form Form, uint64_t Integer) {
- addUInt(Block, (dwarf::Attribute)0, Form, Integer);
-}
-
-/// addSInt - Add an signed integer attribute data and value.
-///
-void CompileUnit::addSInt(DIE *Die, dwarf::Attribute Attribute,
- Optional<dwarf::Form> Form, int64_t Integer) {
- if (!Form)
- Form = DIEInteger::BestForm(true, Integer);
- DIEValue *Value = new (DIEValueAllocator) DIEInteger(Integer);
- Die->addValue(Attribute, *Form, Value);
-}
-
-void CompileUnit::addSInt(DIEBlock *Die, Optional<dwarf::Form> Form,
- int64_t Integer) {
- addSInt(Die, (dwarf::Attribute)0, Form, Integer);
-}
-
-/// addString - Add a string attribute data and value. We always emit a
-/// reference to the string pool instead of immediate strings so that DIEs have
-/// more predictable sizes. In the case of split dwarf we emit an index
-/// into another table which gets us the static offset into the string
-/// table.
-void CompileUnit::addString(DIE *Die, dwarf::Attribute Attribute,
- StringRef String) {
- DIEValue *Value;
- dwarf::Form Form;
- if (!DD->useSplitDwarf()) {
- MCSymbol *Symb = DU->getStringPoolEntry(String);
- if (Asm->needsRelocationsForDwarfStringPool())
- Value = new (DIEValueAllocator) DIELabel(Symb);
- else {
- MCSymbol *StringPool = DU->getStringPoolSym();
- Value = new (DIEValueAllocator) DIEDelta(Symb, StringPool);
- }
- Form = dwarf::DW_FORM_strp;
- } else {
- unsigned idx = DU->getStringPoolIndex(String);
- Value = new (DIEValueAllocator) DIEInteger(idx);
- Form = dwarf::DW_FORM_GNU_str_index;
- }
- DIEValue *Str = new (DIEValueAllocator) DIEString(Value, String);
- Die->addValue(Attribute, Form, Str);
-}
-
-/// addLocalString - Add a string attribute data and value. This is guaranteed
-/// to be in the local string pool instead of indirected.
-void CompileUnit::addLocalString(DIE *Die, dwarf::Attribute Attribute,
- StringRef String) {
- MCSymbol *Symb = DU->getStringPoolEntry(String);
- DIEValue *Value;
- if (Asm->needsRelocationsForDwarfStringPool())
- Value = new (DIEValueAllocator) DIELabel(Symb);
- else {
- MCSymbol *StringPool = DU->getStringPoolSym();
- Value = new (DIEValueAllocator) DIEDelta(Symb, StringPool);
- }
- Die->addValue(Attribute, dwarf::DW_FORM_strp, Value);
-}
-
-/// addExpr - Add a Dwarf expression attribute data and value.
-///
-void CompileUnit::addExpr(DIEBlock *Die, dwarf::Form Form, const MCExpr *Expr) {
- DIEValue *Value = new (DIEValueAllocator) DIEExpr(Expr);
- Die->addValue((dwarf::Attribute)0, Form, Value);
-}
-
-/// addLabel - Add a Dwarf label attribute data and value.
-///
-void CompileUnit::addLabel(DIE *Die, dwarf::Attribute Attribute,
- dwarf::Form Form, const MCSymbol *Label) {
- DIEValue *Value = new (DIEValueAllocator) DIELabel(Label);
- Die->addValue(Attribute, Form, Value);
-}
-
-void CompileUnit::addLabel(DIEBlock *Die, dwarf::Form Form,
- const MCSymbol *Label) {
- addLabel(Die, (dwarf::Attribute)0, Form, Label);
+DwarfCompileUnit::DwarfCompileUnit(unsigned UID, DICompileUnit Node,
+ AsmPrinter *A, DwarfDebug *DW,
+ DwarfFile *DWU)
+ : DwarfUnit(UID, dwarf::DW_TAG_compile_unit, Node, A, DW, DWU),
+ Skeleton(nullptr), LabelBegin(nullptr), BaseAddress(nullptr) {
+ insertDIE(Node, &getUnitDie());
}
/// addLabelAddress - Add a dwarf label attribute data and value using
/// DW_FORM_addr or DW_FORM_GNU_addr_index.
///
-void CompileUnit::addLabelAddress(DIE *Die, dwarf::Attribute Attribute,
- MCSymbol *Label) {
- if (Label)
- DD->addArangeLabel(SymbolCU(this, Label));
+void DwarfCompileUnit::addLabelAddress(DIE &Die, dwarf::Attribute Attribute,
+ const MCSymbol *Label) {
- if (!DD->useSplitDwarf()) {
- if (Label != NULL) {
- DIEValue *Value = new (DIEValueAllocator) DIELabel(Label);
- Die->addValue(Attribute, dwarf::DW_FORM_addr, Value);
- } else {
- DIEValue *Value = new (DIEValueAllocator) DIEInteger(0);
- Die->addValue(Attribute, dwarf::DW_FORM_addr, Value);
- }
- } else {
- unsigned idx = DU->getAddrPoolIndex(Label);
- DIEValue *Value = new (DIEValueAllocator) DIEInteger(idx);
- Die->addValue(Attribute, dwarf::DW_FORM_GNU_addr_index, Value);
- }
-}
+ // Don't use the address pool in non-fission or in the skeleton unit itself.
+ // FIXME: Once GDB supports this, it's probably worthwhile using the address
+ // pool from the skeleton - maybe even in non-fission (possibly fewer
+ // relocations by sharing them in the pool, but we have other ideas about how
+ // to reduce the number of relocations as well/instead).
+ if (!DD->useSplitDwarf() || !Skeleton)
+ return addLocalLabelAddress(Die, Attribute, Label);
-/// addOpAddress - Add a dwarf op address data and value using the
-/// form given and an op of either DW_FORM_addr or DW_FORM_GNU_addr_index.
-///
-void CompileUnit::addOpAddress(DIEBlock *Die, const MCSymbol *Sym) {
- DD->addArangeLabel(SymbolCU(this, Sym));
- if (!DD->useSplitDwarf()) {
- addUInt(Die, dwarf::DW_FORM_data1, dwarf::DW_OP_addr);
- addLabel(Die, dwarf::DW_FORM_udata, Sym);
- } else {
- addUInt(Die, dwarf::DW_FORM_data1, dwarf::DW_OP_GNU_addr_index);
- addUInt(Die, dwarf::DW_FORM_GNU_addr_index, DU->getAddrPoolIndex(Sym));
- }
-}
-
-/// addDelta - Add a label delta attribute data and value.
-///
-void CompileUnit::addDelta(DIE *Die, dwarf::Attribute Attribute,
- dwarf::Form 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 CompileUnit::addDIEEntry(DIE *Die, dwarf::Attribute Attribute,
- DIE *Entry) {
- addDIEEntry(Die, Attribute, createDIEEntry(Entry));
-}
-
-void CompileUnit::addDIEEntry(DIE *Die, dwarf::Attribute Attribute,
- DIEEntry *Entry) {
- const DIE *DieCU = Die->getCompileUnitOrNull();
- const DIE *EntryCU = Entry->getEntry()->getCompileUnitOrNull();
- if (!DieCU)
- // We assume that Die belongs to this CU, if it is not linked to any CU yet.
- DieCU = getCUDie();
- if (!EntryCU)
- EntryCU = getCUDie();
- Die->addValue(Attribute, EntryCU == DieCU ? dwarf::DW_FORM_ref4
- : dwarf::DW_FORM_ref_addr,
- Entry);
-}
-
-/// Create a DIE with the given Tag, add the DIE to its parent, and
-/// call insertDIE if MD is not null.
-DIE *CompileUnit::createAndAddDIE(unsigned Tag, DIE &Parent, const MDNode *MD) {
- DIE *Die = new DIE(Tag);
- Parent.addChild(Die);
- if (MD)
- insertDIE(MD, Die);
- return Die;
-}
+ if (Label)
+ DD->addArangeLabel(SymbolCU(this, Label));
-/// addBlock - Add block data.
-///
-void CompileUnit::addBlock(DIE *Die, dwarf::Attribute Attribute,
- DIEBlock *Block) {
- Block->ComputeSize(Asm);
- DIEBlocks.push_back(Block); // Memoize so we can call the destructor later on.
- Die->addValue(Attribute, Block->BestForm(), Block);
+ unsigned idx = DD->getAddressPool().getIndex(Label);
+ DIEValue *Value = new (DIEValueAllocator) DIEInteger(idx);
+ Die.addValue(Attribute, dwarf::DW_FORM_GNU_addr_index, Value);
}
-/// addSourceLine - Add location information to specified debug information
-/// entry.
-void CompileUnit::addSourceLine(DIE *Die, DIVariable V) {
- // Verify variable.
- if (!V.isVariable())
- return;
+void DwarfCompileUnit::addLocalLabelAddress(DIE &Die,
+ dwarf::Attribute Attribute,
+ const MCSymbol *Label) {
+ if (Label)
+ DD->addArangeLabel(SymbolCU(this, Label));
- unsigned Line = V.getLineNumber();
- if (Line == 0)
- return;
- unsigned FileID =
- DD->getOrCreateSourceID(V.getContext().getFilename(),
- V.getContext().getDirectory(), getUniqueID());
- assert(FileID && "Invalid file id");
- addUInt(Die, dwarf::DW_AT_decl_file, None, FileID);
- addUInt(Die, dwarf::DW_AT_decl_line, None, Line);
+ Die.addValue(Attribute, dwarf::DW_FORM_addr,
+ Label ? (DIEValue *)new (DIEValueAllocator) DIELabel(Label)
+ : new (DIEValueAllocator) DIEInteger(0));
}
-/// addSourceLine - Add location information to specified debug information
-/// entry.
-void CompileUnit::addSourceLine(DIE *Die, DIGlobalVariable G) {
- // Verify global variable.
- if (!G.isGlobalVariable())
- return;
+unsigned DwarfCompileUnit::getOrCreateSourceID(StringRef FileName,
+ StringRef DirName) {
+ // If we print assembly, we can't separate .file entries according to
+ // compile units. Thus all files will belong to the default compile unit.
- unsigned Line = G.getLineNumber();
- if (Line == 0)
- return;
- unsigned FileID =
- DD->getOrCreateSourceID(G.getFilename(), G.getDirectory(), getUniqueID());
- assert(FileID && "Invalid file id");
- addUInt(Die, dwarf::DW_AT_decl_file, None, FileID);
- addUInt(Die, dwarf::DW_AT_decl_line, None, Line);
+ // FIXME: add a better feature test than hasRawTextSupport. Even better,
+ // extend .file to support this.
+ return Asm->OutStreamer.EmitDwarfFileDirective(
+ 0, DirName, FileName,
+ Asm->OutStreamer.hasRawTextSupport() ? 0 : getUniqueID());
}
-/// addSourceLine - Add location information to specified debug information
-/// entry.
-void CompileUnit::addSourceLine(DIE *Die, DISubprogram SP) {
- // Verify subprogram.
- if (!SP.isSubprogram())
- return;
+// Return const expression 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 nullptr;
- // If the line number is 0, don't add it.
- unsigned Line = SP.getLineNumber();
- if (Line == 0)
- return;
+ // First operand points to a global struct.
+ Value *Ptr = CE->getOperand(0);
+ if (!isa<GlobalValue>(Ptr) ||
+ !isa<StructType>(cast<PointerType>(Ptr->getType())->getElementType()))
+ return nullptr;
- unsigned FileID = DD->getOrCreateSourceID(SP.getFilename(), SP.getDirectory(),
- getUniqueID());
- assert(FileID && "Invalid file id");
- addUInt(Die, dwarf::DW_AT_decl_file, None, FileID);
- addUInt(Die, dwarf::DW_AT_decl_line, None, Line);
-}
+ // Second operand is zero.
+ const ConstantInt *CI = dyn_cast_or_null<ConstantInt>(CE->getOperand(1));
+ if (!CI || !CI->isZero())
+ return nullptr;
-/// addSourceLine - Add location information to specified debug information
-/// entry.
-void CompileUnit::addSourceLine(DIE *Die, DIType Ty) {
- // Verify type.
- if (!Ty.isType())
- return;
+ // Third operand is offset.
+ if (!isa<ConstantInt>(CE->getOperand(2)))
+ return nullptr;
- unsigned Line = Ty.getLineNumber();
- if (Line == 0)
- return;
- unsigned FileID = DD->getOrCreateSourceID(Ty.getFilename(), Ty.getDirectory(),
- getUniqueID());
- assert(FileID && "Invalid file id");
- addUInt(Die, dwarf::DW_AT_decl_file, None, FileID);
- addUInt(Die, dwarf::DW_AT_decl_line, None, Line);
+ return CE;
}
-/// addSourceLine - Add location information to specified debug information
-/// entry.
-void CompileUnit::addSourceLine(DIE *Die, DIObjCProperty Ty) {
- // Verify type.
- if (!Ty.isObjCProperty())
- return;
+/// getOrCreateGlobalVariableDIE - get or create global variable DIE.
+DIE *DwarfCompileUnit::getOrCreateGlobalVariableDIE(DIGlobalVariable GV) {
+ // Check for pre-existence.
+ if (DIE *Die = getDIE(GV))
+ return Die;
- unsigned Line = Ty.getLineNumber();
- if (Line == 0)
- return;
- DIFile File = Ty.getFile();
- unsigned FileID = DD->getOrCreateSourceID(File.getFilename(),
- File.getDirectory(), getUniqueID());
- assert(FileID && "Invalid file id");
- addUInt(Die, dwarf::DW_AT_decl_file, None, FileID);
- addUInt(Die, dwarf::DW_AT_decl_line, None, Line);
-}
+ assert(GV.isGlobalVariable());
-/// addSourceLine - Add location information to specified debug information
-/// entry.
-void CompileUnit::addSourceLine(DIE *Die, DINameSpace NS) {
- // Verify namespace.
- if (!NS.Verify())
- return;
+ DIScope GVContext = GV.getContext();
+ DIType GTy = DD->resolve(GV.getType());
- unsigned Line = NS.getLineNumber();
- if (Line == 0)
- return;
- StringRef FN = NS.getFilename();
+ // Construct the context before querying for the existence of the DIE in
+ // case such construction creates the DIE.
+ DIE *ContextDIE = getOrCreateContextDIE(GVContext);
- unsigned FileID =
- DD->getOrCreateSourceID(FN, NS.getDirectory(), getUniqueID());
- assert(FileID && "Invalid file id");
- addUInt(Die, dwarf::DW_AT_decl_file, None, FileID);
- addUInt(Die, dwarf::DW_AT_decl_line, None, Line);
-}
+ // Add to map.
+ DIE *VariableDIE = &createAndAddDIE(GV.getTag(), *ContextDIE, GV);
+ DIScope DeclContext;
-/// addVariableAddress - Add DW_AT_location attribute for a
-/// DbgVariable based on provided MachineLocation.
-void CompileUnit::addVariableAddress(const DbgVariable &DV, DIE *Die,
- MachineLocation Location) {
- 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,
- DV.getVariable().isIndirect());
-}
+ if (DIDerivedType SDMDecl = GV.getStaticDataMemberDeclaration()) {
+ DeclContext = resolve(SDMDecl.getContext());
+ assert(SDMDecl.isStaticMember() && "Expected static member decl");
+ assert(GV.isDefinition());
+ // We need the declaration DIE that is in the static member's class.
+ DIE *VariableSpecDIE = getOrCreateStaticMemberDIE(SDMDecl);
+ addDIEEntry(*VariableDIE, dwarf::DW_AT_specification, *VariableSpecDIE);
+ } else {
+ DeclContext = GV.getContext();
+ // Add name and type.
+ addString(*VariableDIE, dwarf::DW_AT_name, GV.getDisplayName());
+ addType(*VariableDIE, GTy);
-/// addRegisterOp - Add register operand.
-void CompileUnit::addRegisterOp(DIEBlock *TheDie, unsigned Reg) {
- const TargetRegisterInfo *RI = Asm->TM.getRegisterInfo();
- unsigned DWReg = RI->getDwarfRegNum(Reg, false);
- if (DWReg < 32)
- addUInt(TheDie, dwarf::DW_FORM_data1, dwarf::DW_OP_reg0 + DWReg);
- else {
- addUInt(TheDie, dwarf::DW_FORM_data1, dwarf::DW_OP_regx);
- addUInt(TheDie, dwarf::DW_FORM_udata, DWReg);
- }
-}
+ // Add scoping info.
+ if (!GV.isLocalToUnit())
+ addFlag(*VariableDIE, dwarf::DW_AT_external);
-/// addRegisterOffset - Add register offset.
-void CompileUnit::addRegisterOffset(DIEBlock *TheDie, unsigned Reg,
- int64_t Offset) {
- const TargetRegisterInfo *RI = Asm->TM.getRegisterInfo();
- unsigned DWReg = RI->getDwarfRegNum(Reg, false);
- const TargetRegisterInfo *TRI = Asm->TM.getRegisterInfo();
- if (Reg == TRI->getFrameRegister(*Asm->MF))
- // If variable offset is based in frame register then use fbreg.
- addUInt(TheDie, dwarf::DW_FORM_data1, dwarf::DW_OP_fbreg);
- else if (DWReg < 32)
- addUInt(TheDie, dwarf::DW_FORM_data1, dwarf::DW_OP_breg0 + DWReg);
- else {
- addUInt(TheDie, dwarf::DW_FORM_data1, dwarf::DW_OP_bregx);
- addUInt(TheDie, dwarf::DW_FORM_udata, DWReg);
+ // Add line number info.
+ addSourceLine(*VariableDIE, GV);
}
- addSInt(TheDie, dwarf::DW_FORM_sdata, Offset);
-}
-/// addAddress - Add an address attribute to a die based on the location
-/// provided.
-void CompileUnit::addAddress(DIE *Die, dwarf::Attribute Attribute,
- const MachineLocation &Location, bool Indirect) {
- DIEBlock *Block = new (DIEValueAllocator) DIEBlock();
+ if (!GV.isDefinition())
+ addFlag(*VariableDIE, dwarf::DW_AT_declaration);
- if (Location.isReg() && !Indirect)
- addRegisterOp(Block, Location.getReg());
- else {
- addRegisterOffset(Block, Location.getReg(), Location.getOffset());
- if (Indirect && !Location.isReg()) {
- addUInt(Block, dwarf::DW_FORM_data1, dwarf::DW_OP_deref);
+ // Add location.
+ bool addToAccelTable = false;
+ bool isGlobalVariable = GV.getGlobal() != nullptr;
+ if (isGlobalVariable) {
+ addToAccelTable = true;
+ DIELoc *Loc = new (DIEValueAllocator) DIELoc();
+ const MCSymbol *Sym = Asm->getSymbol(GV.getGlobal());
+ if (GV.getGlobal()->isThreadLocal()) {
+ // FIXME: Make this work with -gsplit-dwarf.
+ unsigned PointerSize = Asm->getDataLayout().getPointerSize();
+ assert((PointerSize == 4 || PointerSize == 8) &&
+ "Add support for other sizes if necessary");
+ // Based on GCC's support for TLS:
+ if (!DD->useSplitDwarf()) {
+ // 1) Start with a constNu of the appropriate pointer size
+ addUInt(*Loc, dwarf::DW_FORM_data1,
+ PointerSize == 4 ? dwarf::DW_OP_const4u : dwarf::DW_OP_const8u);
+ // 2) containing the (relocated) offset of the TLS variable
+ // within the module's TLS block.
+ addExpr(*Loc, dwarf::DW_FORM_udata,
+ Asm->getObjFileLowering().getDebugThreadLocalSymbol(Sym));
+ } else {
+ addUInt(*Loc, dwarf::DW_FORM_data1, dwarf::DW_OP_GNU_const_index);
+ addUInt(*Loc, dwarf::DW_FORM_udata,
+ DD->getAddressPool().getIndex(Sym, /* TLS */ true));
+ }
+ // 3) followed by a custom OP to make the debugger do a TLS lookup.
+ addUInt(*Loc, dwarf::DW_FORM_data1, dwarf::DW_OP_GNU_push_tls_address);
+ } else {
+ DD->addArangeLabel(SymbolCU(this, Sym));
+ addOpAddress(*Loc, Sym);
}
- }
- // Now attach the location information to the DIE.
- addBlock(Die, Attribute, Block);
-}
+ addBlock(*VariableDIE, dwarf::DW_AT_location, Loc);
+ // Add the linkage name.
+ StringRef LinkageName = GV.getLinkageName();
+ if (!LinkageName.empty())
+ // From DWARF4: DIEs to which DW_AT_linkage_name may apply include:
+ // TAG_common_block, TAG_constant, TAG_entry_point, TAG_subprogram and
+ // TAG_variable.
+ addString(*VariableDIE,
+ DD->getDwarfVersion() >= 4 ? dwarf::DW_AT_linkage_name
+ : dwarf::DW_AT_MIPS_linkage_name,
+ GlobalValue::getRealLinkageName(LinkageName));
+ } else if (const ConstantInt *CI =
+ dyn_cast_or_null<ConstantInt>(GV.getConstant())) {
+ addConstantValue(*VariableDIE, CI, GTy);
+ } else if (const ConstantExpr *CE = getMergedGlobalExpr(GV.getConstant())) {
+ addToAccelTable = true;
+ // GV is a merged global.
+ DIELoc *Loc = new (DIEValueAllocator) DIELoc();
+ Value *Ptr = CE->getOperand(0);
+ MCSymbol *Sym = Asm->getSymbol(cast<GlobalValue>(Ptr));
+ DD->addArangeLabel(SymbolCU(this, Sym));
+ addOpAddress(*Loc, Sym);
+ addUInt(*Loc, dwarf::DW_FORM_data1, dwarf::DW_OP_constu);
+ SmallVector<Value *, 3> Idx(CE->op_begin() + 1, CE->op_end());
+ addUInt(*Loc, dwarf::DW_FORM_udata,
+ Asm->getDataLayout().getIndexedOffset(Ptr->getType(), Idx));
+ addUInt(*Loc, dwarf::DW_FORM_data1, dwarf::DW_OP_plus);
+ addBlock(*VariableDIE, dwarf::DW_AT_location, Loc);
+ }
-/// 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 CompileUnit::addComplexAddress(const DbgVariable &DV, DIE *Die,
- dwarf::Attribute Attribute,
- const MachineLocation &Location) {
- DIEBlock *Block = new (DIEValueAllocator) DIEBlock();
- unsigned N = DV.getNumAddrElements();
- unsigned i = 0;
- if (Location.isReg()) {
- if (N >= 2 && DV.getAddrElement(0) == DIBuilder::OpPlus) {
- // If first address element is OpPlus then emit
- // DW_OP_breg + Offset instead of DW_OP_reg + Offset.
- addRegisterOffset(Block, Location.getReg(), DV.getAddrElement(1));
- i = 2;
- } else
- addRegisterOp(Block, Location.getReg());
- } else
- addRegisterOffset(Block, Location.getReg(), Location.getOffset());
+ if (addToAccelTable) {
+ DD->addAccelName(GV.getName(), *VariableDIE);
- for (; i < N; ++i) {
- uint64_t Element = DV.getAddrElement(i);
- if (Element == DIBuilder::OpPlus) {
- addUInt(Block, dwarf::DW_FORM_data1, dwarf::DW_OP_plus_uconst);
- addUInt(Block, dwarf::DW_FORM_udata, DV.getAddrElement(++i));
- } else if (Element == DIBuilder::OpDeref) {
- if (!Location.isReg())
- addUInt(Block, dwarf::DW_FORM_data1, dwarf::DW_OP_deref);
- } else
- llvm_unreachable("unknown DIBuilder Opcode");
+ // If the linkage name is different than the name, go ahead and output
+ // that as well into the name table.
+ if (GV.getLinkageName() != "" && GV.getName() != GV.getLinkageName())
+ DD->addAccelName(GV.getLinkageName(), *VariableDIE);
}
- // Now attach the location information to the DIE.
- addBlock(Die, Attribute, Block);
+ addGlobalName(GV.getName(), *VariableDIE, DeclContext);
+ return VariableDIE;
}
-/* 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 CompileUnit::addBlockByrefAddress(const DbgVariable &DV, DIE *Die,
- dwarf::Attribute Attribute,
- const MachineLocation &Location) {
- DIType Ty = DV.getType();
- DIType TmpTy = Ty;
- uint16_t Tag = Ty.getTag();
- bool isPointer = false;
-
- StringRef varName = DV.getName();
-
- if (Tag == dwarf::DW_TAG_pointer_type) {
- DIDerivedType DTy = DIDerivedType(Ty);
- TmpTy = resolve(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;
+void DwarfCompileUnit::addRange(RangeSpan Range) {
+ bool SameAsPrevCU = this == DD->getPrevCU();
+ DD->setPrevCU(this);
+ // If we have no current ranges just add the range and return, otherwise,
+ // check the current section and CU against the previous section and CU we
+ // emitted into and the subprogram was contained within. If these are the
+ // same then extend our current range, otherwise add this as a new range.
+ if (CURanges.empty() || !SameAsPrevCU ||
+ (&CURanges.back().getEnd()->getSection() !=
+ &Range.getEnd()->getSection())) {
+ CURanges.push_back(Range);
+ return;
}
- // 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.
- DIEBlock *Block = new (DIEValueAllocator) DIEBlock();
+ CURanges.back().setEnd(Range.getEnd());
+}
- if (Location.isReg())
- addRegisterOp(Block, Location.getReg());
+void DwarfCompileUnit::addSectionLabel(DIE &Die, dwarf::Attribute Attribute,
+ const MCSymbol *Label,
+ const MCSymbol *Sec) {
+ if (Asm->MAI->doesDwarfUseRelocationsAcrossSections())
+ addLabel(Die, Attribute,
+ DD->getDwarfVersion() >= 4 ? dwarf::DW_FORM_sec_offset
+ : dwarf::DW_FORM_data4,
+ Label);
else
- addRegisterOffset(Block, Location.getReg(), 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, 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, dwarf::DW_FORM_data1, dwarf::DW_OP_plus_uconst);
- addUInt(Block, dwarf::DW_FORM_udata, forwardingFieldOffset);
- }
-
- // Now dereference the __forwarding field to get to the real __Block_byref
- // struct: DW_OP_deref.
- addUInt(Block, dwarf::DW_FORM_data1, dwarf::DW_OP_deref);
+ addSectionDelta(Die, Attribute, Label, Sec);
+}
- // 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, dwarf::DW_FORM_data1, dwarf::DW_OP_plus_uconst);
- addUInt(Block, dwarf::DW_FORM_udata, varFieldOffset);
- }
+void DwarfCompileUnit::initStmtList(MCSymbol *DwarfLineSectionSym) {
+ // Define start line table label for each Compile Unit.
+ MCSymbol *LineTableStartSym =
+ Asm->OutStreamer.getDwarfLineTableSymbol(getUniqueID());
- // Now attach the location information to the DIE.
- addBlock(Die, Attribute, Block);
-}
+ stmtListIndex = UnitDie.getValues().size();
-/// isTypeSigned - Return true if the type is signed.
-static bool isTypeSigned(DwarfDebug *DD, DIType Ty, int *SizeInBits) {
- if (Ty.isDerivedType())
- return isTypeSigned(DD, DD->resolve(DIDerivedType(Ty).getTypeDerivedFrom()),
- SizeInBits);
- if (Ty.isBasicType())
- if (DIBasicType(Ty).getEncoding() == dwarf::DW_ATE_signed ||
- DIBasicType(Ty).getEncoding() == dwarf::DW_ATE_signed_char) {
- *SizeInBits = Ty.getSizeInBits();
- return true;
- }
- return false;
+ // DW_AT_stmt_list is a offset of line number information for this
+ // compile unit in debug_line section. For split dwarf this is
+ // left in the skeleton CU and so not included.
+ // The line table entries are not always emitted in assembly, so it
+ // is not okay to use line_table_start here.
+ addSectionLabel(UnitDie, dwarf::DW_AT_stmt_list, LineTableStartSym,
+ DwarfLineSectionSym);
}
-/// Return true if type encoding is unsigned.
-static bool isUnsignedDIType(DwarfDebug *DD, DIType Ty) {
- DIDerivedType DTy(Ty);
- if (DTy.isDerivedType())
- return isUnsignedDIType(DD, DD->resolve(DTy.getTypeDerivedFrom()));
-
- DIBasicType BTy(Ty);
- if (BTy.isBasicType()) {
- unsigned Encoding = BTy.getEncoding();
- if (Encoding == dwarf::DW_ATE_unsigned ||
- Encoding == dwarf::DW_ATE_unsigned_char ||
- Encoding == dwarf::DW_ATE_boolean)
- return true;
- }
- return false;
+void DwarfCompileUnit::applyStmtList(DIE &D) {
+ D.addValue(dwarf::DW_AT_stmt_list,
+ UnitDie.getAbbrev().getData()[stmtListIndex].getForm(),
+ UnitDie.getValues()[stmtListIndex]);
}
-/// If this type is derived from a base type then return base type size.
-static uint64_t getBaseTypeSize(DwarfDebug *DD, DIDerivedType Ty) {
- unsigned Tag = Ty.getTag();
+void DwarfCompileUnit::attachLowHighPC(DIE &D, const MCSymbol *Begin,
+ const MCSymbol *End) {
+ assert(Begin && "Begin label should not be null!");
+ assert(End && "End label should not be null!");
+ assert(Begin->isDefined() && "Invalid starting label");
+ assert(End->isDefined() && "Invalid end label");
- if (Tag != dwarf::DW_TAG_member && Tag != dwarf::DW_TAG_typedef &&
- Tag != dwarf::DW_TAG_const_type && Tag != dwarf::DW_TAG_volatile_type &&
- Tag != dwarf::DW_TAG_restrict_type)
- return Ty.getSizeInBits();
+ addLabelAddress(D, dwarf::DW_AT_low_pc, Begin);
+ if (DD->getDwarfVersion() < 4)
+ addLabelAddress(D, dwarf::DW_AT_high_pc, End);
+ else
+ addLabelDelta(D, dwarf::DW_AT_high_pc, End, Begin);
+}
- DIType BaseType = DD->resolve(Ty.getTypeDerivedFrom());
+// 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 &DwarfCompileUnit::updateSubprogramScopeDIE(DISubprogram SP) {
+ DIE *SPDie = getOrCreateSubprogramDIE(SP, includeMinimalInlineScopes());
- // If this type is not derived from any type then take conservative approach.
- if (!BaseType.isValid())
- return Ty.getSizeInBits();
+ attachLowHighPC(*SPDie, DD->getFunctionBeginSym(), DD->getFunctionEndSym());
+ if (!DD->getCurrentFunction()->getTarget().Options.DisableFramePointerElim(
+ *DD->getCurrentFunction()))
+ addFlag(*SPDie, dwarf::DW_AT_APPLE_omit_frame_ptr);
- // If this is a derived type, go ahead and get the base type, unless it's a
- // reference then it's just the size of the field. Pointer types have no need
- // of this since they're a different type of qualification on the type.
- if (BaseType.getTag() == dwarf::DW_TAG_reference_type ||
- BaseType.getTag() == dwarf::DW_TAG_rvalue_reference_type)
- return Ty.getSizeInBits();
+ // Only include DW_AT_frame_base in full debug info
+ if (!includeMinimalInlineScopes()) {
+ const TargetRegisterInfo *RI =
+ Asm->TM.getSubtargetImpl()->getRegisterInfo();
+ MachineLocation Location(RI->getFrameRegister(*Asm->MF));
+ if (RI->isPhysicalRegister(Location.getReg()))
+ addAddress(*SPDie, dwarf::DW_AT_frame_base, Location);
+ }
- if (BaseType.isDerivedType())
- return getBaseTypeSize(DD, DIDerivedType(BaseType));
+ // Add name to the name table, we do this here because we're guaranteed
+ // to have concrete versions of our DW_TAG_subprogram nodes.
+ DD->addSubprogramNames(SP, *SPDie);
- return BaseType.getSizeInBits();
+ return *SPDie;
}
-/// addConstantValue - Add constant value entry in variable DIE.
-void CompileUnit::addConstantValue(DIE *Die, const MachineOperand &MO,
- DIType Ty) {
- // FIXME: This is a bit conservative/simple - it emits negative values at
- // their maximum bit width which is a bit unfortunate (& doesn't prefer
- // udata/sdata over dataN as suggested by the DWARF spec)
- assert(MO.isImm() && "Invalid machine operand!");
- int SizeInBits = -1;
- bool SignedConstant = isTypeSigned(DD, Ty, &SizeInBits);
- dwarf::Form Form;
-
- // If we're a signed constant definitely use sdata.
- if (SignedConstant) {
- addSInt(Die, dwarf::DW_AT_const_value, dwarf::DW_FORM_sdata, MO.getImm());
+// Construct a DIE for this scope.
+void DwarfCompileUnit::constructScopeDIE(
+ LexicalScope *Scope, SmallVectorImpl<std::unique_ptr<DIE>> &FinalChildren) {
+ if (!Scope || !Scope->getScopeNode())
return;
- }
-
- // Else use data for now unless it's larger than we can deal with.
- switch (SizeInBits) {
- case 8:
- Form = dwarf::DW_FORM_data1;
- break;
- case 16:
- Form = dwarf::DW_FORM_data2;
- break;
- case 32:
- Form = dwarf::DW_FORM_data4;
- break;
- case 64:
- Form = dwarf::DW_FORM_data8;
- break;
- default:
- Form = dwarf::DW_FORM_udata;
- addUInt(Die, dwarf::DW_AT_const_value, Form, MO.getImm());
- return;
- }
- addUInt(Die, dwarf::DW_AT_const_value, Form, MO.getImm());
-}
-/// addConstantFPValue - Add constant value entry in variable DIE.
-void CompileUnit::addConstantFPValue(DIE *Die, const MachineOperand &MO) {
- assert(MO.isFPImm() && "Invalid machine operand!");
- DIEBlock *Block = new (DIEValueAllocator) DIEBlock();
- APFloat FPImm = MO.getFPImm()->getValueAPF();
+ DIScope DS(Scope->getScopeNode());
- // Get the raw data form of the floating point.
- const APInt FltVal = FPImm.bitcastToAPInt();
- const char *FltPtr = (const char *)FltVal.getRawData();
+ assert((Scope->getInlinedAt() || !DS.isSubprogram()) &&
+ "Only handle inlined subprograms here, use "
+ "constructSubprogramScopeDIE for non-inlined "
+ "subprograms");
- int NumBytes = FltVal.getBitWidth() / 8; // 8 bits per byte.
- bool LittleEndian = Asm->getDataLayout().isLittleEndian();
- int Incr = (LittleEndian ? 1 : -1);
- int Start = (LittleEndian ? 0 : NumBytes - 1);
- int Stop = (LittleEndian ? NumBytes : -1);
+ SmallVector<std::unique_ptr<DIE>, 8> Children;
- // Output the constant to DWARF one byte at a time.
- for (; Start != Stop; Start += Incr)
- addUInt(Block, dwarf::DW_FORM_data1, (unsigned char)0xFF & FltPtr[Start]);
-
- addBlock(Die, dwarf::DW_AT_const_value, Block);
-}
-
-/// addConstantFPValue - Add constant value entry in variable DIE.
-void CompileUnit::addConstantFPValue(DIE *Die, const ConstantFP *CFP) {
- // Pass this down to addConstantValue as an unsigned bag of bits.
- addConstantValue(Die, CFP->getValueAPF().bitcastToAPInt(), true);
-}
-
-/// addConstantValue - Add constant value entry in variable DIE.
-void CompileUnit::addConstantValue(DIE *Die, const ConstantInt *CI,
- bool Unsigned) {
- addConstantValue(Die, CI->getValue(), Unsigned);
-}
-
-// addConstantValue - Add constant value entry in variable DIE.
-void CompileUnit::addConstantValue(DIE *Die, const APInt &Val, bool Unsigned) {
- unsigned CIBitWidth = Val.getBitWidth();
- if (CIBitWidth <= 64) {
- // If we're a signed constant definitely use sdata.
- if (!Unsigned) {
- addSInt(Die, dwarf::DW_AT_const_value, dwarf::DW_FORM_sdata,
- Val.getSExtValue());
+ // We try to create the scope DIE first, then the children DIEs. This will
+ // avoid creating un-used children then removing them later when we find out
+ // the scope DIE is null.
+ std::unique_ptr<DIE> ScopeDIE;
+ if (Scope->getParent() && DS.isSubprogram()) {
+ ScopeDIE = constructInlinedScopeDIE(Scope);
+ if (!ScopeDIE)
return;
- }
-
- // Else use data for now unless it's larger than we can deal with.
- dwarf::Form Form;
- switch (CIBitWidth) {
- case 8:
- Form = dwarf::DW_FORM_data1;
- break;
- case 16:
- Form = dwarf::DW_FORM_data2;
- break;
- case 32:
- Form = dwarf::DW_FORM_data4;
- break;
- case 64:
- Form = dwarf::DW_FORM_data8;
- break;
- default:
- addUInt(Die, dwarf::DW_AT_const_value, dwarf::DW_FORM_udata,
- Val.getZExtValue());
+ // We create children when the scope DIE is not null.
+ createScopeChildrenDIE(Scope, Children);
+ } else {
+ // Early exit when we know the scope DIE is going to be null.
+ if (DD->isLexicalScopeDIENull(Scope))
return;
- }
- addUInt(Die, dwarf::DW_AT_const_value, Form, Val.getZExtValue());
- return;
- }
-
- DIEBlock *Block = new (DIEValueAllocator) DIEBlock();
-
- // Get the raw data form of the large APInt.
- const uint64_t *Ptr64 = Val.getRawData();
- int NumBytes = Val.getBitWidth() / 8; // 8 bits per byte.
- bool LittleEndian = Asm->getDataLayout().isLittleEndian();
+ unsigned ChildScopeCount;
- // Output the constant to DWARF one byte at a time.
- for (int i = 0; i < NumBytes; i++) {
- uint8_t c;
- if (LittleEndian)
- c = Ptr64[i / 8] >> (8 * (i & 7));
- else
- c = Ptr64[(NumBytes - 1 - i) / 8] >> (8 * ((NumBytes - 1 - i) & 7));
- addUInt(Block, dwarf::DW_FORM_data1, c);
- }
-
- addBlock(Die, dwarf::DW_AT_const_value, Block);
-}
-
-/// addTemplateParams - Add template parameters into buffer.
-void CompileUnit::addTemplateParams(DIE &Buffer, DIArray TParams) {
- // Add template parameters.
- for (unsigned i = 0, e = TParams.getNumElements(); i != e; ++i) {
- DIDescriptor Element = TParams.getElement(i);
- if (Element.isTemplateTypeParameter())
- constructTemplateTypeParameterDIE(Buffer,
- DITemplateTypeParameter(Element));
- else if (Element.isTemplateValueParameter())
- constructTemplateValueParameterDIE(Buffer,
- DITemplateValueParameter(Element));
- }
-}
-
-/// getOrCreateContextDIE - Get context owner's DIE.
-DIE *CompileUnit::getOrCreateContextDIE(DIScope Context) {
- if (!Context || Context.isFile())
- return getCUDie();
- if (Context.isType())
- return getOrCreateTypeDIE(DIType(Context));
- if (Context.isNameSpace())
- return getOrCreateNameSpace(DINameSpace(Context));
- if (Context.isSubprogram())
- return getOrCreateSubprogramDIE(DISubprogram(Context));
- return getDIE(Context);
-}
+ // We create children here when we know the scope DIE is not going to be
+ // null and the children will be added to the scope DIE.
+ createScopeChildrenDIE(Scope, Children, &ChildScopeCount);
-/// getOrCreateTypeDIE - Find existing DIE or create new DIE for the
-/// given DIType.
-DIE *CompileUnit::getOrCreateTypeDIE(const MDNode *TyNode) {
- if (!TyNode)
- return NULL;
-
- DIType Ty(TyNode);
- assert(Ty.isType());
-
- // Construct the context before querying for the existence of the DIE in case
- // such construction creates the DIE.
- DIE *ContextDIE = getOrCreateContextDIE(resolve(Ty.getContext()));
-
- DIE *TyDIE = getDIE(Ty);
- if (TyDIE)
- return TyDIE;
-
- // Create new type.
- TyDIE = createAndAddDIE(Ty.getTag(), *ContextDIE, Ty);
-
- 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));
- }
- // If this is a named finished type then include it in the list of types
- // for the accelerator tables.
- if (!Ty.getName().empty() && !Ty.isForwardDecl()) {
- bool IsImplementation = 0;
- if (Ty.isCompositeType()) {
- DICompositeType CT(Ty);
- // A runtime language of 0 actually means C/C++ and that any
- // non-negative value is some version of Objective-C/C++.
- IsImplementation = (CT.getRunTimeLang() == 0) || CT.isObjcClassComplete();
+ // Skip imported directives in gmlt-like data.
+ if (!includeMinimalInlineScopes()) {
+ // There is no need to emit empty lexical block DIE.
+ for (const auto &E : DD->findImportedEntitiesForScope(DS))
+ Children.push_back(
+ constructImportedEntityDIE(DIImportedEntity(E.second)));
}
- unsigned Flags = IsImplementation ? dwarf::DW_FLAG_type_implementation : 0;
- addAccelType(Ty.getName(), std::make_pair(TyDIE, Flags));
- }
-
- return TyDIE;
-}
-/// addType - Add a new type attribute to the specified entity.
-void CompileUnit::addType(DIE *Entity, DIType Ty, dwarf::Attribute Attribute) {
- assert(Ty && "Trying to add a type that doesn't exist?");
-
- // Check for pre-existence.
- DIEEntry *Entry = getDIEEntry(Ty);
- // If it exists then use the existing value.
- if (Entry) {
- addDIEEntry(Entity, Attribute, Entry);
- return;
+ // If there are only other scopes as children, put them directly in the
+ // parent instead, as this scope would serve no purpose.
+ if (Children.size() == ChildScopeCount) {
+ FinalChildren.insert(FinalChildren.end(),
+ std::make_move_iterator(Children.begin()),
+ std::make_move_iterator(Children.end()));
+ return;
+ }
+ ScopeDIE = constructLexicalScopeDIE(Scope);
+ assert(ScopeDIE && "Scope DIE should not be null.");
}
- // Construct type.
- DIE *Buffer = getOrCreateTypeDIE(Ty);
+ // Add children
+ for (auto &I : Children)
+ ScopeDIE->addChild(std::move(I));
- // Set up proxy.
- Entry = createDIEEntry(Buffer);
- insertDIEEntry(Ty, Entry);
- addDIEEntry(Entity, Attribute, Entry);
-
- // If this is a complete composite type then include it in the
- // list of global types.
- addGlobalType(Ty);
+ FinalChildren.push_back(std::move(ScopeDIE));
}
-// Accelerator table mutators - add each name along with its companion
-// DIE to the proper table while ensuring that the name that we're going
-// to reference is in the string table. We do this since the names we
-// add may not only be identical to the names in the DIE.
-void CompileUnit::addAccelName(StringRef Name, DIE *Die) {
- DU->getStringPoolEntry(Name);
- std::vector<DIE *> &DIEs = AccelNames[Name];
- DIEs.push_back(Die);
-}
+void DwarfCompileUnit::addSectionDelta(DIE &Die, dwarf::Attribute Attribute,
+ const MCSymbol *Hi, const MCSymbol *Lo) {
+ DIEValue *Value = new (DIEValueAllocator) DIEDelta(Hi, Lo);
+ Die.addValue(Attribute, DD->getDwarfVersion() >= 4 ? dwarf::DW_FORM_sec_offset
+ : dwarf::DW_FORM_data4,
+ Value);
+}
+
+void DwarfCompileUnit::addScopeRangeList(DIE &ScopeDIE,
+ SmallVector<RangeSpan, 2> Range) {
+ // Emit offset in .debug_range as a relocatable label. emitDIE will handle
+ // emitting it appropriately.
+ auto *RangeSectionSym = DD->getRangeSectionSym();
+
+ RangeSpanList List(
+ Asm->GetTempSymbol("debug_ranges", DD->getNextRangeNumber()),
+ std::move(Range));
+
+ // Under fission, ranges are specified by constant offsets relative to the
+ // CU's DW_AT_GNU_ranges_base.
+ if (isDwoUnit())
+ addSectionDelta(ScopeDIE, dwarf::DW_AT_ranges, List.getSym(),
+ RangeSectionSym);
+ else
+ addSectionLabel(ScopeDIE, dwarf::DW_AT_ranges, List.getSym(),
+ RangeSectionSym);
-void CompileUnit::addAccelObjC(StringRef Name, DIE *Die) {
- DU->getStringPoolEntry(Name);
- std::vector<DIE *> &DIEs = AccelObjC[Name];
- DIEs.push_back(Die);
+ // Add the range list to the set of ranges to be emitted.
+ (Skeleton ? Skeleton : this)->CURangeLists.push_back(std::move(List));
}
-void CompileUnit::addAccelNamespace(StringRef Name, DIE *Die) {
- DU->getStringPoolEntry(Name);
- std::vector<DIE *> &DIEs = AccelNamespace[Name];
- DIEs.push_back(Die);
+void DwarfCompileUnit::attachRangesOrLowHighPC(
+ DIE &Die, SmallVector<RangeSpan, 2> Ranges) {
+ if (Ranges.size() == 1) {
+ const auto &single = Ranges.front();
+ attachLowHighPC(Die, single.getStart(), single.getEnd());
+ } else
+ addScopeRangeList(Die, std::move(Ranges));
}
-void CompileUnit::addAccelType(StringRef Name, std::pair<DIE *, unsigned> Die) {
- DU->getStringPoolEntry(Name);
- std::vector<std::pair<DIE *, unsigned> > &DIEs = AccelTypes[Name];
- DIEs.push_back(Die);
+void DwarfCompileUnit::attachRangesOrLowHighPC(
+ DIE &Die, const SmallVectorImpl<InsnRange> &Ranges) {
+ SmallVector<RangeSpan, 2> List;
+ List.reserve(Ranges.size());
+ for (const InsnRange &R : Ranges)
+ List.push_back(RangeSpan(DD->getLabelBeforeInsn(R.first),
+ DD->getLabelAfterInsn(R.second)));
+ attachRangesOrLowHighPC(Die, std::move(List));
}
-/// addGlobalName - Add a new global name to the compile unit.
-void CompileUnit::addGlobalName(StringRef Name, DIE *Die, DIScope Context) {
- std::string FullName = getParentContextString(Context) + Name.str();
- GlobalNames[FullName] = Die;
-}
+// This scope represents inlined body of a function. Construct DIE to
+// represent this concrete inlined copy of the function.
+std::unique_ptr<DIE>
+DwarfCompileUnit::constructInlinedScopeDIE(LexicalScope *Scope) {
+ assert(Scope->getScopeNode());
+ DIScope DS(Scope->getScopeNode());
+ DISubprogram InlinedSP = getDISubprogram(DS);
+ // Find the subprogram's DwarfCompileUnit in the SPMap in case the subprogram
+ // was inlined from another compile unit.
+ DIE *OriginDIE = DU->getAbstractSPDies()[InlinedSP];
+ assert(OriginDIE && "Unable to find original DIE for an inlined subprogram.");
-/// addGlobalType - Add a new global type to the compile unit.
-///
-void CompileUnit::addGlobalType(DIType Ty) {
- DIScope Context = resolve(Ty.getContext());
- if (!Ty.getName().empty() && !Ty.isForwardDecl() &&
- (!Context || Context.isCompileUnit() || Context.isFile() ||
- Context.isNameSpace()))
- if (DIEEntry *Entry = getDIEEntry(Ty)) {
- std::string FullName =
- getParentContextString(Context) + Ty.getName().str();
- GlobalTypes[FullName] = Entry->getEntry();
- }
-}
+ auto ScopeDIE = make_unique<DIE>(dwarf::DW_TAG_inlined_subroutine);
+ addDIEEntry(*ScopeDIE, dwarf::DW_AT_abstract_origin, *OriginDIE);
-/// getParentContextString - Walks the metadata parent chain in a language
-/// specific manner (using the compile unit language) and returns
-/// it as a string. This is done at the metadata level because DIEs may
-/// not currently have been added to the parent context and walking the
-/// DIEs looking for names is more expensive than walking the metadata.
-std::string CompileUnit::getParentContextString(DIScope Context) const {
- if (!Context)
- return "";
-
- // FIXME: Decide whether to implement this for non-C++ languages.
- if (getLanguage() != dwarf::DW_LANG_C_plus_plus)
- return "";
-
- std::string CS;
- SmallVector<DIScope, 1> Parents;
- while (!Context.isCompileUnit()) {
- Parents.push_back(Context);
- if (Context.getContext())
- Context = resolve(Context.getContext());
- else
- // Structure, etc types will have a NULL context if they're at the top
- // level.
- break;
- }
+ attachRangesOrLowHighPC(*ScopeDIE, Scope->getRanges());
- // Reverse iterate over our list to go from the outermost construct to the
- // innermost.
- for (SmallVectorImpl<DIScope>::reverse_iterator I = Parents.rbegin(),
- E = Parents.rend();
- I != E; ++I) {
- DIScope Ctx = *I;
- StringRef Name = Ctx.getName();
- if (!Name.empty()) {
- CS += Name;
- CS += "::";
- }
- }
- return CS;
-}
+ // Add the call site information to the DIE.
+ DILocation DL(Scope->getInlinedAt());
+ addUInt(*ScopeDIE, dwarf::DW_AT_call_file, None,
+ getOrCreateSourceID(DL.getFilename(), DL.getDirectory()));
+ addUInt(*ScopeDIE, dwarf::DW_AT_call_line, None, DL.getLineNumber());
-/// addPubTypes - Add subprogram argument types for pubtypes section.
-void CompileUnit::addPubTypes(DISubprogram SP) {
- DICompositeType SPTy = SP.getType();
- uint16_t SPTag = SPTy.getTag();
- if (SPTag != dwarf::DW_TAG_subroutine_type)
- return;
+ // 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.
+ DD->addSubprogramNames(InlinedSP, *ScopeDIE);
- DIArray Args = SPTy.getTypeArray();
- for (unsigned i = 0, e = Args.getNumElements(); i != e; ++i) {
- DIType ATy(Args.getElement(i));
- if (!ATy.isType())
- continue;
- addGlobalType(ATy);
- }
+ return ScopeDIE;
}
-/// constructTypeDIE - Construct basic type die from DIBasicType.
-void CompileUnit::constructTypeDIE(DIE &Buffer, DIBasicType BTy) {
- // Get core information.
- StringRef Name = BTy.getName();
- // Add name if not anonymous or intermediate type.
- if (!Name.empty())
- addString(&Buffer, dwarf::DW_AT_name, Name);
+// Construct new DW_TAG_lexical_block for this scope and attach
+// DW_AT_low_pc/DW_AT_high_pc labels.
+std::unique_ptr<DIE>
+DwarfCompileUnit::constructLexicalScopeDIE(LexicalScope *Scope) {
+ if (DD->isLexicalScopeDIENull(Scope))
+ return nullptr;
- // An unspecified type only has a name attribute.
- if (BTy.getTag() == dwarf::DW_TAG_unspecified_type)
- return;
+ auto ScopeDIE = make_unique<DIE>(dwarf::DW_TAG_lexical_block);
+ if (Scope->isAbstractScope())
+ return ScopeDIE;
- addUInt(&Buffer, dwarf::DW_AT_encoding, dwarf::DW_FORM_data1,
- BTy.getEncoding());
+ attachRangesOrLowHighPC(*ScopeDIE, Scope->getRanges());
- uint64_t Size = BTy.getSizeInBits() >> 3;
- addUInt(&Buffer, dwarf::DW_AT_byte_size, None, Size);
+ return ScopeDIE;
}
-/// constructTypeDIE - Construct derived type die from DIDerivedType.
-void CompileUnit::constructTypeDIE(DIE &Buffer, DIDerivedType DTy) {
- // Get core information.
- StringRef Name = DTy.getName();
- uint64_t Size = DTy.getSizeInBits() >> 3;
- uint16_t Tag = Buffer.getTag();
-
- // Map to main type, void will not have a type.
- DIType FromTy = resolve(DTy.getTypeDerivedFrom());
- if (FromTy)
- addType(&Buffer, FromTy);
-
- // Add name if not anonymous or intermediate type.
- if (!Name.empty())
- addString(&Buffer, dwarf::DW_AT_name, Name);
-
- // Add size if non-zero (derived types might be zero-sized.)
- if (Size && Tag != dwarf::DW_TAG_pointer_type)
- addUInt(&Buffer, dwarf::DW_AT_byte_size, None, Size);
-
- if (Tag == dwarf::DW_TAG_ptr_to_member_type)
- addDIEEntry(&Buffer, dwarf::DW_AT_containing_type,
- getOrCreateTypeDIE(resolve(DTy.getClassType())));
- // Add source line info if available and TyDesc is not a forward declaration.
- if (!DTy.isForwardDecl())
- addSourceLine(&Buffer, DTy);
+/// constructVariableDIE - Construct a DIE for the given DbgVariable.
+std::unique_ptr<DIE> DwarfCompileUnit::constructVariableDIE(DbgVariable &DV,
+ bool Abstract) {
+ auto D = constructVariableDIEImpl(DV, Abstract);
+ DV.setDIE(*D);
+ return D;
}
-/// Return true if the type is appropriately scoped to be contained inside
-/// its own type unit.
-static bool isTypeUnitScoped(DIType Ty, const DwarfDebug *DD) {
- DIScope Parent = DD->resolve(Ty.getContext());
- while (Parent) {
- // Don't generate a hash for anything scoped inside a function.
- if (Parent.isSubprogram())
- return false;
- Parent = DD->resolve(Parent.getContext());
- }
- return true;
-}
+std::unique_ptr<DIE>
+DwarfCompileUnit::constructVariableDIEImpl(const DbgVariable &DV,
+ bool Abstract) {
+ // Define variable debug information entry.
+ auto VariableDie = make_unique<DIE>(DV.getTag());
-/// Return true if the type should be split out into a type unit.
-static bool shouldCreateTypeUnit(DICompositeType CTy, const DwarfDebug *DD) {
- uint16_t Tag = CTy.getTag();
-
- switch (Tag) {
- case dwarf::DW_TAG_structure_type:
- case dwarf::DW_TAG_union_type:
- case dwarf::DW_TAG_enumeration_type:
- case dwarf::DW_TAG_class_type:
- // If this is a class, structure, union, or enumeration type
- // that is a definition (not a declaration), and not scoped
- // inside a function then separate this out as a type unit.
- return !CTy.isForwardDecl() && isTypeUnitScoped(CTy, DD);
- default:
- return false;
+ if (Abstract) {
+ applyVariableAttributes(DV, *VariableDie);
+ return VariableDie;
}
-}
-/// constructTypeDIE - Construct type DIE from DICompositeType.
-void CompileUnit::constructTypeDIE(DIE &Buffer, DICompositeType CTy) {
- // Get core information.
- StringRef Name = CTy.getName();
-
- uint64_t Size = CTy.getSizeInBits() >> 3;
- uint16_t Tag = Buffer.getTag();
-
- switch (Tag) {
- case dwarf::DW_TAG_array_type:
- constructArrayTypeDIE(Buffer, CTy);
- break;
- case dwarf::DW_TAG_enumeration_type:
- constructEnumTypeDIE(Buffer, CTy);
- break;
- case dwarf::DW_TAG_subroutine_type: {
- // Add return type. A void return won't have a type.
- DIArray Elements = CTy.getTypeArray();
- DIDescriptor RTy = Elements.getElement(0);
- if (RTy)
- 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()) {
- createAndAddDIE(dwarf::DW_TAG_unspecified_parameters, Buffer);
- isPrototyped = false;
- } else {
- DIE *Arg = createAndAddDIE(dwarf::DW_TAG_formal_parameter, Buffer);
- addType(Arg, DIType(Ty));
- if (DIType(Ty).isArtificial())
- addFlag(Arg, dwarf::DW_AT_artificial);
- }
- }
- // Add prototype flag if we're dealing with a C language and the
- // function has been prototyped.
- uint16_t Language = DICompileUnit(Node).getLanguage();
- if (isPrototyped &&
- (Language == dwarf::DW_LANG_C89 || Language == dwarf::DW_LANG_C99 ||
- Language == dwarf::DW_LANG_ObjC))
- addFlag(&Buffer, dwarf::DW_AT_prototyped);
- } 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();
- for (unsigned i = 0, N = Elements.getNumElements(); i < N; ++i) {
- DIDescriptor Element = Elements.getElement(i);
- DIE *ElemDie = NULL;
- if (Element.isSubprogram()) {
- DISubprogram SP(Element);
- ElemDie = getOrCreateSubprogramDIE(DISubprogram(Element));
- if (SP.isProtected())
- addUInt(ElemDie, dwarf::DW_AT_accessibility, dwarf::DW_FORM_data1,
- dwarf::DW_ACCESS_protected);
- else if (SP.isPrivate())
- addUInt(ElemDie, dwarf::DW_AT_accessibility, dwarf::DW_FORM_data1,
- dwarf::DW_ACCESS_private);
- else
- addUInt(ElemDie, dwarf::DW_AT_accessibility, dwarf::DW_FORM_data1,
- dwarf::DW_ACCESS_public);
- if (SP.isExplicit())
- addFlag(ElemDie, dwarf::DW_AT_explicit);
- } else if (Element.isDerivedType()) {
- DIDerivedType DDTy(Element);
- if (DDTy.getTag() == dwarf::DW_TAG_friend) {
- ElemDie = createAndAddDIE(dwarf::DW_TAG_friend, Buffer);
- addType(ElemDie, resolve(DDTy.getTypeDerivedFrom()),
- dwarf::DW_AT_friend);
- } else if (DDTy.isStaticMember()) {
- getOrCreateStaticMemberDIE(DDTy);
- } else {
- constructMemberDIE(Buffer, DDTy);
- }
- } else if (Element.isObjCProperty()) {
- DIObjCProperty Property(Element);
- ElemDie = createAndAddDIE(Property.getTag(), Buffer);
- StringRef PropertyName = Property.getObjCPropertyName();
- addString(ElemDie, dwarf::DW_AT_APPLE_property_name, PropertyName);
- addType(ElemDie, Property.getType());
- addSourceLine(ElemDie, Property);
- StringRef GetterName = Property.getObjCPropertyGetterName();
- if (!GetterName.empty())
- addString(ElemDie, dwarf::DW_AT_APPLE_property_getter, GetterName);
- StringRef SetterName = Property.getObjCPropertySetterName();
- if (!SetterName.empty())
- addString(ElemDie, dwarf::DW_AT_APPLE_property_setter, SetterName);
- unsigned PropertyAttributes = 0;
- if (Property.isReadOnlyObjCProperty())
- PropertyAttributes |= dwarf::DW_APPLE_PROPERTY_readonly;
- if (Property.isReadWriteObjCProperty())
- PropertyAttributes |= dwarf::DW_APPLE_PROPERTY_readwrite;
- if (Property.isAssignObjCProperty())
- PropertyAttributes |= dwarf::DW_APPLE_PROPERTY_assign;
- if (Property.isRetainObjCProperty())
- PropertyAttributes |= dwarf::DW_APPLE_PROPERTY_retain;
- if (Property.isCopyObjCProperty())
- PropertyAttributes |= dwarf::DW_APPLE_PROPERTY_copy;
- if (Property.isNonAtomicObjCProperty())
- PropertyAttributes |= dwarf::DW_APPLE_PROPERTY_nonatomic;
- if (PropertyAttributes)
- addUInt(ElemDie, dwarf::DW_AT_APPLE_property_attribute, None,
- PropertyAttributes);
-
- DIEEntry *Entry = getDIEEntry(Element);
- if (!Entry) {
- Entry = createDIEEntry(ElemDie);
- insertDIEEntry(Element, Entry);
- }
- } else
- continue;
- }
-
- if (CTy.isAppleBlockExtension())
- addFlag(&Buffer, dwarf::DW_AT_APPLE_block);
-
- DICompositeType ContainingType(resolve(CTy.getContainingType()));
- if (DIDescriptor(ContainingType).isCompositeType())
- addDIEEntry(&Buffer, dwarf::DW_AT_containing_type,
- getOrCreateTypeDIE(DIType(ContainingType)));
+ // Add variable address.
- if (CTy.isObjcClassComplete())
- addFlag(&Buffer, dwarf::DW_AT_APPLE_objc_complete_type);
+ unsigned Offset = DV.getDotDebugLocOffset();
+ if (Offset != ~0U) {
+ addLocationList(*VariableDie, dwarf::DW_AT_location, Offset);
+ return VariableDie;
+ }
- // Add template parameters to a class, structure or union types.
- // FIXME: The support isn't in the metadata for this yet.
- if (Tag == dwarf::DW_TAG_class_type ||
- Tag == dwarf::DW_TAG_structure_type || Tag == dwarf::DW_TAG_union_type)
- addTemplateParams(Buffer, CTy.getTemplateParams());
+ // Check if variable is described by a DBG_VALUE instruction.
+ if (const MachineInstr *DVInsn = DV.getMInsn()) {
+ assert(DVInsn->getNumOperands() == 4);
+ if (DVInsn->getOperand(0).isReg()) {
+ const MachineOperand RegOp = DVInsn->getOperand(0);
+ // If the second operand is an immediate, this is an indirect value.
+ if (DVInsn->getOperand(1).isImm()) {
+ MachineLocation Location(RegOp.getReg(),
+ DVInsn->getOperand(1).getImm());
+ addVariableAddress(DV, *VariableDie, Location);
+ } else if (RegOp.getReg())
+ addVariableAddress(DV, *VariableDie, MachineLocation(RegOp.getReg()));
+ } else if (DVInsn->getOperand(0).isImm())
+ addConstantValue(*VariableDie, DVInsn->getOperand(0), DV.getType());
+ else if (DVInsn->getOperand(0).isFPImm())
+ addConstantFPValue(*VariableDie, DVInsn->getOperand(0));
+ else if (DVInsn->getOperand(0).isCImm())
+ addConstantValue(*VariableDie, DVInsn->getOperand(0).getCImm(),
+ DV.getType());
- break;
- }
- default:
- break;
+ return VariableDie;
}
- // Add name if not anonymous or intermediate type.
- if (!Name.empty())
- addString(&Buffer, dwarf::DW_AT_name, 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.)
- // TODO: Do we care about size for enum forward declarations?
- if (Size)
- addUInt(&Buffer, dwarf::DW_AT_byte_size, None, Size);
- else if (!CTy.isForwardDecl())
- // Add zero size if it is not a forward declaration.
- addUInt(&Buffer, dwarf::DW_AT_byte_size, None, 0);
-
- // If we're a forward decl, say so.
- if (CTy.isForwardDecl())
- addFlag(&Buffer, dwarf::DW_AT_declaration);
-
- // Add source line info if available.
- if (!CTy.isForwardDecl())
- addSourceLine(&Buffer, CTy);
-
- // No harm in adding the runtime language to the declaration.
- unsigned RLang = CTy.getRunTimeLang();
- if (RLang)
- addUInt(&Buffer, dwarf::DW_AT_APPLE_runtime_class, dwarf::DW_FORM_data1,
- RLang);
+ // .. else use frame index.
+ int FI = DV.getFrameIndex();
+ if (FI != ~0) {
+ unsigned FrameReg = 0;
+ const TargetFrameLowering *TFI =
+ Asm->TM.getSubtargetImpl()->getFrameLowering();
+ int Offset = TFI->getFrameIndexReference(*Asm->MF, FI, FrameReg);
+ MachineLocation Location(FrameReg, Offset);
+ addVariableAddress(DV, *VariableDie, Location);
}
- // If this is a type applicable to a type unit it then add it to the
- // list of types we'll compute a hash for later.
- if (shouldCreateTypeUnit(CTy, DD))
- DD->addTypeUnitType(&Buffer);
-}
-/// constructTemplateTypeParameterDIE - Construct new DIE for the given
-/// DITemplateTypeParameter.
-void
-CompileUnit::constructTemplateTypeParameterDIE(DIE &Buffer,
- DITemplateTypeParameter TP) {
- DIE *ParamDIE =
- createAndAddDIE(dwarf::DW_TAG_template_type_parameter, Buffer);
- // Add the type if it exists, it could be void and therefore no type.
- if (TP.getType())
- addType(ParamDIE, resolve(TP.getType()));
- if (!TP.getName().empty())
- addString(ParamDIE, dwarf::DW_AT_name, TP.getName());
-}
-
-/// constructTemplateValueParameterDIE - Construct new DIE for the given
-/// DITemplateValueParameter.
-void
-CompileUnit::constructTemplateValueParameterDIE(DIE &Buffer,
- DITemplateValueParameter VP) {
- DIE *ParamDIE = createAndAddDIE(VP.getTag(), Buffer);
-
- // Add the type if there is one, template template and template parameter
- // packs will not have a type.
- if (VP.getTag() == dwarf::DW_TAG_template_value_parameter)
- addType(ParamDIE, resolve(VP.getType()));
- if (!VP.getName().empty())
- addString(ParamDIE, dwarf::DW_AT_name, VP.getName());
- if (Value *Val = VP.getValue()) {
- if (ConstantInt *CI = dyn_cast<ConstantInt>(Val))
- addConstantValue(ParamDIE, CI,
- isUnsignedDIType(DD, resolve(VP.getType())));
- else if (GlobalValue *GV = dyn_cast<GlobalValue>(Val)) {
- // For declaration non-type template parameters (such as global values and
- // functions)
- DIEBlock *Block = new (DIEValueAllocator) DIEBlock();
- addOpAddress(Block, Asm->getSymbol(GV));
- // Emit DW_OP_stack_value to use the address as the immediate value of the
- // parameter, rather than a pointer to it.
- addUInt(Block, dwarf::DW_FORM_data1, dwarf::DW_OP_stack_value);
- addBlock(ParamDIE, dwarf::DW_AT_location, Block);
- } else if (VP.getTag() == dwarf::DW_TAG_GNU_template_template_param) {
- assert(isa<MDString>(Val));
- addString(ParamDIE, dwarf::DW_AT_GNU_template_name,
- cast<MDString>(Val)->getString());
- } else if (VP.getTag() == dwarf::DW_TAG_GNU_template_parameter_pack) {
- assert(isa<MDNode>(Val));
- DIArray A(cast<MDNode>(Val));
- addTemplateParams(*ParamDIE, A);
- }
- }
+ return VariableDie;
}
-/// getOrCreateNameSpace - Create a DIE for DINameSpace.
-DIE *CompileUnit::getOrCreateNameSpace(DINameSpace NS) {
- // Construct the context before querying for the existence of the DIE in case
- // such construction creates the DIE.
- DIE *ContextDIE = getOrCreateContextDIE(NS.getContext());
-
- DIE *NDie = getDIE(NS);
- if (NDie)
- return NDie;
- NDie = createAndAddDIE(dwarf::DW_TAG_namespace, *ContextDIE, NS);
-
- if (!NS.getName().empty()) {
- addString(NDie, dwarf::DW_AT_name, NS.getName());
- addAccelNamespace(NS.getName(), NDie);
- addGlobalName(NS.getName(), NDie, NS.getContext());
- } else
- addAccelNamespace("(anonymous namespace)", NDie);
- addSourceLine(NDie, NS);
- return NDie;
+std::unique_ptr<DIE> DwarfCompileUnit::constructVariableDIE(
+ DbgVariable &DV, const LexicalScope &Scope, DIE *&ObjectPointer) {
+ auto Var = constructVariableDIE(DV, Scope.isAbstractScope());
+ if (DV.isObjectPointer())
+ ObjectPointer = Var.get();
+ return Var;
}
-/// getOrCreateSubprogramDIE - Create new DIE using SP.
-DIE *CompileUnit::getOrCreateSubprogramDIE(DISubprogram SP) {
- // Construct the context before querying for the existence of the DIE in case
- // such construction creates the DIE (as is the case for member function
- // declarations).
- DIE *ContextDIE = getOrCreateContextDIE(resolve(SP.getContext()));
+DIE *DwarfCompileUnit::createScopeChildrenDIE(
+ LexicalScope *Scope, SmallVectorImpl<std::unique_ptr<DIE>> &Children,
+ unsigned *ChildScopeCount) {
+ DIE *ObjectPointer = nullptr;
- DIE *SPDie = getDIE(SP);
- if (SPDie)
- return SPDie;
+ for (DbgVariable *DV : DU->getScopeVariables().lookup(Scope))
+ Children.push_back(constructVariableDIE(*DV, *Scope, ObjectPointer));
- DISubprogram SPDecl = SP.getFunctionDeclaration();
- if (SPDecl.isSubprogram())
- // Add subprogram definitions to the CU die directly.
- ContextDIE = CUDie.get();
+ unsigned ChildCountWithoutScopes = Children.size();
- // DW_TAG_inlined_subroutine may refer to this DIE.
- SPDie = createAndAddDIE(dwarf::DW_TAG_subprogram, *ContextDIE, SP);
+ for (LexicalScope *LS : Scope->getChildren())
+ constructScopeDIE(LS, Children);
- DIE *DeclDie = NULL;
- if (SPDecl.isSubprogram())
- DeclDie = getOrCreateSubprogramDIE(SPDecl);
+ if (ChildScopeCount)
+ *ChildScopeCount = Children.size() - ChildCountWithoutScopes;
- // Add function template parameters.
- addTemplateParams(*SPDie, SP.getTemplateParams());
+ return ObjectPointer;
+}
- // If this DIE is going to refer declaration info using AT_specification
- // then there is no need to add other attributes.
- if (DeclDie) {
- // Refer function declaration directly.
- addDIEEntry(SPDie, dwarf::DW_AT_specification, DeclDie);
+void DwarfCompileUnit::constructSubprogramScopeDIE(LexicalScope *Scope) {
+ assert(Scope && Scope->getScopeNode());
+ assert(!Scope->getInlinedAt());
+ assert(!Scope->isAbstractScope());
+ DISubprogram Sub(Scope->getScopeNode());
- return SPDie;
- }
+ assert(Sub.isSubprogram());
- // Add the linkage name if we have one.
- StringRef LinkageName = SP.getLinkageName();
- if (!LinkageName.empty())
- addString(SPDie, dwarf::DW_AT_MIPS_linkage_name,
- GlobalValue::getRealLinkageName(LinkageName));
-
- // Constructors and operators for anonymous aggregates do not have names.
- if (!SP.getName().empty())
- addString(SPDie, dwarf::DW_AT_name, SP.getName());
-
- addSourceLine(SPDie, SP);
-
- // Add the prototype if we have a prototype and we have a C like
- // language.
- uint16_t Language = DICompileUnit(Node).getLanguage();
- if (SP.isPrototyped() &&
- (Language == dwarf::DW_LANG_C89 || Language == dwarf::DW_LANG_C99 ||
- Language == dwarf::DW_LANG_ObjC))
- addFlag(SPDie, dwarf::DW_AT_prototyped);
-
- DICompositeType SPTy = SP.getType();
- assert(SPTy.getTag() == dwarf::DW_TAG_subroutine_type &&
- "the type of a subprogram should be a subroutine");
-
- DIArray Args = SPTy.getTypeArray();
- // Add a return type. If this is a type like a C/C++ void type we don't add a
- // return type.
- if (Args.getElement(0))
- addType(SPDie, DIType(Args.getElement(0)));
-
- unsigned VK = SP.getVirtuality();
- if (VK) {
- addUInt(SPDie, dwarf::DW_AT_virtuality, dwarf::DW_FORM_data1, VK);
- DIEBlock *Block = getDIEBlock();
- addUInt(Block, dwarf::DW_FORM_data1, dwarf::DW_OP_constu);
- addUInt(Block, dwarf::DW_FORM_udata, SP.getVirtualIndex());
- addBlock(SPDie, dwarf::DW_AT_vtable_elem_location, Block);
- ContainingTypeMap.insert(
- std::make_pair(SPDie, resolve(SP.getContainingType())));
- }
+ DD->getProcessedSPNodes().insert(Sub);
- if (!SP.isDefinition()) {
- addFlag(SPDie, dwarf::DW_AT_declaration);
-
- // Add arguments. Do not add arguments for subprogram definition. They will
- // be handled while processing variables.
- for (unsigned i = 1, N = Args.getNumElements(); i < N; ++i) {
- DIE *Arg = createAndAddDIE(dwarf::DW_TAG_formal_parameter, *SPDie);
- DIType ATy = DIType(Args.getElement(i));
- addType(Arg, ATy);
- if (ATy.isArtificial())
- addFlag(Arg, dwarf::DW_AT_artificial);
- }
- }
-
- if (SP.isArtificial())
- addFlag(SPDie, dwarf::DW_AT_artificial);
+ DIE &ScopeDIE = updateSubprogramScopeDIE(Sub);
- if (!SP.isLocalToUnit())
- addFlag(SPDie, dwarf::DW_AT_external);
+ // If this is a variadic function, add an unspecified parameter.
+ DITypeArray FnArgs = Sub.getType().getTypeArray();
- if (SP.isOptimized())
- addFlag(SPDie, dwarf::DW_AT_APPLE_optimized);
-
- if (unsigned isa = Asm->getISAEncoding()) {
- addUInt(SPDie, dwarf::DW_AT_APPLE_isa, dwarf::DW_FORM_flag, isa);
- }
+ // Collect lexical scope children first.
+ // ObjectPointer might be a local (non-argument) local variable if it's a
+ // block's synthetic this pointer.
+ if (DIE *ObjectPointer = createAndAddScopeChildren(Scope, ScopeDIE))
+ addDIEEntry(ScopeDIE, dwarf::DW_AT_object_pointer, *ObjectPointer);
- return SPDie;
+ // If we have a single element of null, it is a function that returns void.
+ // If we have more than one elements and the last one is null, it is a
+ // variadic function.
+ if (FnArgs.getNumElements() > 1 &&
+ !FnArgs.getElement(FnArgs.getNumElements() - 1) &&
+ !includeMinimalInlineScopes())
+ ScopeDIE.addChild(make_unique<DIE>(dwarf::DW_TAG_unspecified_parameters));
}
-// Return const expression 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 struct.
- Value *Ptr = CE->getOperand(0);
- if (!isa<GlobalValue>(Ptr) ||
- !isa<StructType>(cast<PointerType>(Ptr->getType())->getElementType()))
- return NULL;
+DIE *DwarfCompileUnit::createAndAddScopeChildren(LexicalScope *Scope,
+ DIE &ScopeDIE) {
+ // We create children when the scope DIE is not null.
+ SmallVector<std::unique_ptr<DIE>, 8> Children;
+ DIE *ObjectPointer = createScopeChildrenDIE(Scope, Children);
- // 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;
+ // Add children
+ for (auto &I : Children)
+ ScopeDIE.addChild(std::move(I));
- return CE;
+ return ObjectPointer;
}
-/// createGlobalVariableDIE - create global variable DIE.
-void CompileUnit::createGlobalVariableDIE(const MDNode *N) {
- // Check for pre-existence.
- if (getDIE(N))
+void
+DwarfCompileUnit::constructAbstractSubprogramScopeDIE(LexicalScope *Scope) {
+ DIE *&AbsDef = DU->getAbstractSPDies()[Scope->getScopeNode()];
+ if (AbsDef)
return;
- DIGlobalVariable GV(N);
- if (!GV.isGlobalVariable())
- return;
+ DISubprogram SP(Scope->getScopeNode());
- DIScope GVContext = GV.getContext();
- DIType GTy = GV.getType();
-
- // If this is a static data member definition, some attributes belong
- // to the declaration DIE.
- DIE *VariableDIE = NULL;
- bool IsStaticMember = false;
- DIDerivedType SDMDecl = GV.getStaticDataMemberDeclaration();
- if (SDMDecl.Verify()) {
- assert(SDMDecl.isStaticMember() && "Expected static member decl");
- // We need the declaration DIE that is in the static member's class.
- VariableDIE = getOrCreateStaticMemberDIE(SDMDecl);
- IsStaticMember = true;
- }
+ DIE *ContextDIE;
- // If this is not a static data member definition, create the variable
- // DIE and add the initial set of attributes to it.
- if (!VariableDIE) {
- // Construct the context before querying for the existence of the DIE in
- // case such construction creates the DIE.
- DIE *ContextDIE = getOrCreateContextDIE(GVContext);
-
- // Add to map.
- VariableDIE = createAndAddDIE(GV.getTag(), *ContextDIE, N);
-
- // Add name and type.
- addString(VariableDIE, dwarf::DW_AT_name, GV.getDisplayName());
- addType(VariableDIE, GTy);
+ if (includeMinimalInlineScopes())
+ ContextDIE = &getUnitDie();
+ // Some of this is duplicated from DwarfUnit::getOrCreateSubprogramDIE, with
+ // the important distinction that the DIDescriptor is not associated with the
+ // DIE (since the DIDescriptor will be associated with the concrete DIE, if
+ // any). It could be refactored to some common utility function.
+ else if (DISubprogram SPDecl = SP.getFunctionDeclaration()) {
+ ContextDIE = &getUnitDie();
+ getOrCreateSubprogramDIE(SPDecl);
+ } else
+ ContextDIE = getOrCreateContextDIE(resolve(SP.getContext()));
+
+ // Passing null as the associated DIDescriptor because the abstract definition
+ // shouldn't be found by lookup.
+ AbsDef =
+ &createAndAddDIE(dwarf::DW_TAG_subprogram, *ContextDIE, DIDescriptor());
+ applySubprogramAttributesToDefinition(SP, *AbsDef);
+
+ if (!includeMinimalInlineScopes())
+ addUInt(*AbsDef, dwarf::DW_AT_inline, None, dwarf::DW_INL_inlined);
+ if (DIE *ObjectPointer = createAndAddScopeChildren(Scope, *AbsDef))
+ addDIEEntry(*AbsDef, dwarf::DW_AT_object_pointer, *ObjectPointer);
+}
+
+std::unique_ptr<DIE>
+DwarfCompileUnit::constructImportedEntityDIE(const DIImportedEntity &Module) {
+ assert(Module.Verify() &&
+ "Use one of the MDNode * overloads to handle invalid metadata");
+ std::unique_ptr<DIE> IMDie = make_unique<DIE>((dwarf::Tag)Module.getTag());
+ insertDIE(Module, IMDie.get());
+ DIE *EntityDie;
+ DIDescriptor Entity = resolve(Module.getEntity());
+ if (Entity.isNameSpace())
+ EntityDie = getOrCreateNameSpace(DINameSpace(Entity));
+ else if (Entity.isSubprogram())
+ EntityDie = getOrCreateSubprogramDIE(DISubprogram(Entity));
+ else if (Entity.isType())
+ EntityDie = getOrCreateTypeDIE(DIType(Entity));
+ else if (Entity.isGlobalVariable())
+ EntityDie = getOrCreateGlobalVariableDIE(DIGlobalVariable(Entity));
+ else
+ EntityDie = getDIE(Entity);
+ assert(EntityDie);
+ addSourceLine(*IMDie, Module.getLineNumber(),
+ Module.getContext().getFilename(),
+ Module.getContext().getDirectory());
+ addDIEEntry(*IMDie, dwarf::DW_AT_import, *EntityDie);
+ StringRef Name = Module.getName();
+ if (!Name.empty())
+ addString(*IMDie, dwarf::DW_AT_name, Name);
- // Add scoping info.
- if (!GV.isLocalToUnit())
- addFlag(VariableDIE, dwarf::DW_AT_external);
+ return IMDie;
+}
- // Add line number info.
- addSourceLine(VariableDIE, GV);
- }
+void DwarfCompileUnit::finishSubprogramDefinition(DISubprogram SP) {
+ DIE *D = getDIE(SP);
+ if (DIE *AbsSPDIE = DU->getAbstractSPDies().lookup(SP)) {
+ if (D)
+ // If this subprogram has an abstract definition, reference that
+ addDIEEntry(*D, dwarf::DW_AT_abstract_origin, *AbsSPDIE);
+ } else {
+ if (!D && !includeMinimalInlineScopes())
+ // Lazily construct the subprogram if we didn't see either concrete or
+ // inlined versions during codegen. (except in -gmlt ^ where we want
+ // to omit these entirely)
+ D = getOrCreateSubprogramDIE(SP);
+ if (D)
+ // And attach the attributes
+ applySubprogramAttributesToDefinition(SP, *D);
+ }
+}
+void DwarfCompileUnit::collectDeadVariables(DISubprogram SP) {
+ assert(SP.isSubprogram() && "CU's subprogram list contains a non-subprogram");
+ assert(SP.isDefinition() &&
+ "CU's subprogram list contains a subprogram declaration");
+ DIArray Variables = SP.getVariables();
+ if (Variables.getNumElements() == 0)
+ return;
- // Add location.
- bool addToAccelTable = false;
- DIE *VariableSpecDIE = NULL;
- bool isGlobalVariable = GV.getGlobal() != NULL;
- if (isGlobalVariable) {
- addToAccelTable = true;
- DIEBlock *Block = new (DIEValueAllocator) DIEBlock();
- const MCSymbol *Sym = Asm->getSymbol(GV.getGlobal());
- if (GV.getGlobal()->isThreadLocal()) {
- // FIXME: Make this work with -gsplit-dwarf.
- unsigned PointerSize = Asm->getDataLayout().getPointerSize();
- assert((PointerSize == 4 || PointerSize == 8) &&
- "Add support for other sizes if necessary");
- const MCExpr *Expr =
- Asm->getObjFileLowering().getDebugThreadLocalSymbol(Sym);
- // Based on GCC's support for TLS:
- if (!DD->useSplitDwarf()) {
- // 1) Start with a constNu of the appropriate pointer size
- addUInt(Block, dwarf::DW_FORM_data1,
- PointerSize == 4 ? dwarf::DW_OP_const4u : dwarf::DW_OP_const8u);
- // 2) containing the (relocated) offset of the TLS variable
- // within the module's TLS block.
- addExpr(Block, dwarf::DW_FORM_udata, Expr);
- } else {
- addUInt(Block, dwarf::DW_FORM_data1, dwarf::DW_OP_GNU_const_index);
- addUInt(Block, dwarf::DW_FORM_udata, DU->getAddrPoolIndex(Expr));
- }
- // 3) followed by a custom OP to make the debugger do a TLS lookup.
- addUInt(Block, dwarf::DW_FORM_data1, dwarf::DW_OP_GNU_push_tls_address);
- } else
- addOpAddress(Block, Sym);
- // Do not create specification DIE if context is either compile unit
- // or a subprogram.
- if (GVContext && GV.isDefinition() && !GVContext.isCompileUnit() &&
- !GVContext.isFile() && !DD->isSubprogramContext(GVContext)) {
- // Create specification DIE.
- VariableSpecDIE = createAndAddDIE(dwarf::DW_TAG_variable, *CUDie.get());
- addDIEEntry(VariableSpecDIE, dwarf::DW_AT_specification, VariableDIE);
- addBlock(VariableSpecDIE, dwarf::DW_AT_location, Block);
- // A static member's declaration is already flagged as such.
- if (!SDMDecl.Verify())
- addFlag(VariableDIE, dwarf::DW_AT_declaration);
- } else {
- addBlock(VariableDIE, dwarf::DW_AT_location, Block);
- }
- // Add the linkage name.
- StringRef LinkageName = GV.getLinkageName();
- if (!LinkageName.empty())
- // From DWARF4: DIEs to which DW_AT_linkage_name may apply include:
- // TAG_common_block, TAG_constant, TAG_entry_point, TAG_subprogram and
- // TAG_variable.
- addString(IsStaticMember && VariableSpecDIE ? VariableSpecDIE
- : VariableDIE,
- dwarf::DW_AT_MIPS_linkage_name,
- GlobalValue::getRealLinkageName(LinkageName));
- } else if (const ConstantInt *CI =
- dyn_cast_or_null<ConstantInt>(GV.getConstant())) {
- // AT_const_value was added when the static member was created. To avoid
- // emitting AT_const_value multiple times, we only add AT_const_value when
- // it is not a static member.
- if (!IsStaticMember)
- addConstantValue(VariableDIE, CI, isUnsignedDIType(DD, GTy));
- } else if (const ConstantExpr *CE = getMergedGlobalExpr(N->getOperand(11))) {
- addToAccelTable = true;
- // GV is a merged global.
- DIEBlock *Block = new (DIEValueAllocator) DIEBlock();
- Value *Ptr = CE->getOperand(0);
- addOpAddress(Block, Asm->getSymbol(cast<GlobalValue>(Ptr)));
- addUInt(Block, dwarf::DW_FORM_data1, dwarf::DW_OP_constu);
- SmallVector<Value *, 3> Idx(CE->op_begin() + 1, CE->op_end());
- addUInt(Block, dwarf::DW_FORM_udata,
- Asm->getDataLayout().getIndexedOffset(Ptr->getType(), Idx));
- addUInt(Block, dwarf::DW_FORM_data1, dwarf::DW_OP_plus);
- addBlock(VariableDIE, dwarf::DW_AT_location, Block);
+ DIE *SPDIE = DU->getAbstractSPDies().lookup(SP);
+ if (!SPDIE)
+ SPDIE = getDIE(SP);
+ assert(SPDIE);
+ for (unsigned vi = 0, ve = Variables.getNumElements(); vi != ve; ++vi) {
+ DIVariable DV(Variables.getElement(vi));
+ assert(DV.isVariable());
+ DbgVariable NewVar(DV, DIExpression(nullptr), DD);
+ auto VariableDie = constructVariableDIE(NewVar);
+ applyVariableAttributes(NewVar, *VariableDie);
+ SPDIE->addChild(std::move(VariableDie));
}
+}
- if (addToAccelTable) {
- DIE *AddrDIE = VariableSpecDIE ? VariableSpecDIE : VariableDIE;
- addAccelName(GV.getName(), AddrDIE);
-
- // If the linkage name is different than the name, go ahead and output
- // that as well into the name table.
- if (GV.getLinkageName() != "" && GV.getName() != GV.getLinkageName())
- addAccelName(GV.getLinkageName(), AddrDIE);
- }
+void DwarfCompileUnit::emitHeader(const MCSymbol *ASectionSym) const {
+ // Don't bother labeling the .dwo unit, as its offset isn't used.
+ if (!Skeleton)
+ Asm->OutStreamer.EmitLabel(LabelBegin);
- if (!GV.isLocalToUnit())
- addGlobalName(GV.getName(), VariableSpecDIE ? VariableSpecDIE : VariableDIE,
- GV.getContext());
+ DwarfUnit::emitHeader(ASectionSym);
}
-/// constructSubrangeDIE - Construct subrange DIE from DISubrange.
-void CompileUnit::constructSubrangeDIE(DIE &Buffer, DISubrange SR,
- DIE *IndexTy) {
- DIE *DW_Subrange = createAndAddDIE(dwarf::DW_TAG_subrange_type, Buffer);
- addDIEEntry(DW_Subrange, dwarf::DW_AT_type, IndexTy);
-
- // The LowerBound value defines the lower bounds which is typically zero for
- // C/C++. The Count value is the number of elements. Values are 64 bit. If
- // Count == -1 then the array is unbounded and we do not emit
- // DW_AT_lower_bound and DW_AT_upper_bound attributes. If LowerBound == 0 and
- // Count == 0, then the array has zero elements in which case we do not emit
- // an upper bound.
- int64_t LowerBound = SR.getLo();
- int64_t DefaultLowerBound = getDefaultLowerBound();
- int64_t Count = SR.getCount();
-
- if (DefaultLowerBound == -1 || LowerBound != DefaultLowerBound)
- addUInt(DW_Subrange, dwarf::DW_AT_lower_bound, None, LowerBound);
-
- if (Count != -1 && Count != 0)
- // FIXME: An unbounded array should reference the expression that defines
- // the array.
- addUInt(DW_Subrange, dwarf::DW_AT_upper_bound, None,
- LowerBound + Count - 1);
+/// addGlobalName - Add a new global name to the compile unit.
+void DwarfCompileUnit::addGlobalName(StringRef Name, DIE &Die,
+ DIScope Context) {
+ if (includeMinimalInlineScopes())
+ return;
+ std::string FullName = getParentContextString(Context) + Name.str();
+ GlobalNames[FullName] = &Die;
}
-/// constructArrayTypeDIE - Construct array type DIE from DICompositeType.
-void CompileUnit::constructArrayTypeDIE(DIE &Buffer, DICompositeType CTy) {
- if (CTy.isVector())
- addFlag(&Buffer, dwarf::DW_AT_GNU_vector);
-
- // Emit the element type.
- addType(&Buffer, resolve(CTy.getTypeDerivedFrom()));
-
- // Get an anonymous type for index type.
- // FIXME: This type should be passed down from the front end
- // as different languages may have different sizes for indexes.
- DIE *IdxTy = getIndexTyDie();
- if (!IdxTy) {
- // Construct an anonymous type for index type.
- IdxTy = createAndAddDIE(dwarf::DW_TAG_base_type, *CUDie.get());
- addString(IdxTy, dwarf::DW_AT_name, "int");
- addUInt(IdxTy, dwarf::DW_AT_byte_size, None, sizeof(int32_t));
- addUInt(IdxTy, dwarf::DW_AT_encoding, dwarf::DW_FORM_data1,
- dwarf::DW_ATE_signed);
- setIndexTyDie(IdxTy);
- }
-
- // Add subranges to array type.
- DIArray Elements = CTy.getTypeArray();
- 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);
- }
+/// Add a new global type to the unit.
+void DwarfCompileUnit::addGlobalType(DIType Ty, const DIE &Die,
+ DIScope Context) {
+ if (includeMinimalInlineScopes())
+ return;
+ std::string FullName = getParentContextString(Context) + Ty.getName().str();
+ GlobalTypes[FullName] = &Die;
}
-/// constructEnumTypeDIE - Construct an enum type DIE from DICompositeType.
-void CompileUnit::constructEnumTypeDIE(DIE &Buffer, DICompositeType CTy) {
- DIArray Elements = CTy.getTypeArray();
-
- // Add enumerators to enumeration type.
- for (unsigned i = 0, N = Elements.getNumElements(); i < N; ++i) {
- DIDescriptor Enum(Elements.getElement(i));
- DIEnumerator ETy = DIEnumerator(Enum);
- if (Enum.isEnumerator()) {
- DIE *Enumerator = createAndAddDIE(dwarf::DW_TAG_enumerator, Buffer);
- StringRef Name = ETy.getName();
- addString(Enumerator, dwarf::DW_AT_name, Name);
- int64_t Value = ETy.getEnumValue();
- addSInt(Enumerator, dwarf::DW_AT_const_value, dwarf::DW_FORM_sdata, Value);
- }
- }
- DIType DTy = resolve(CTy.getTypeDerivedFrom());
- if (DTy) {
- addType(&Buffer, DTy);
- addFlag(&Buffer, dwarf::DW_AT_enum_class);
- }
+/// addVariableAddress - Add DW_AT_location attribute for a
+/// DbgVariable based on provided MachineLocation.
+void DwarfCompileUnit::addVariableAddress(const DbgVariable &DV, DIE &Die,
+ MachineLocation Location) {
+ 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,
+ DV.getVariable().isIndirect());
}
-/// constructContainingTypeDIEs - Construct DIEs for types that contain
-/// vtables.
-void CompileUnit::constructContainingTypeDIEs() {
- for (DenseMap<DIE *, const MDNode *>::iterator CI = ContainingTypeMap.begin(),
- CE = ContainingTypeMap.end();
- CI != CE; ++CI) {
- DIE *SPDie = CI->first;
- const MDNode *N = CI->second;
- if (!N)
- continue;
- DIE *NDie = getDIE(N);
- if (!NDie)
- continue;
- addDIEEntry(SPDie, dwarf::DW_AT_containing_type, NDie);
- }
-}
+/// Add an address attribute to a die based on the location provided.
+void DwarfCompileUnit::addAddress(DIE &Die, dwarf::Attribute Attribute,
+ const MachineLocation &Location,
+ bool Indirect) {
+ DIELoc *Loc = new (DIEValueAllocator) DIELoc();
-/// constructVariableDIE - Construct a DIE for the given DbgVariable.
-DIE *CompileUnit::constructVariableDIE(DbgVariable *DV, bool isScopeAbstract) {
- StringRef Name = DV->getName();
+ bool validReg;
+ if (Location.isReg() && !Indirect)
+ validReg = addRegisterOpPiece(*Loc, Location.getReg());
+ else
+ validReg = addRegisterOffset(*Loc, Location.getReg(), Location.getOffset());
- // Define variable debug information entry.
- DIE *VariableDie = new DIE(DV->getTag());
- DbgVariable *AbsVar = DV->getAbstractVariable();
- DIE *AbsDIE = AbsVar ? AbsVar->getDIE() : NULL;
- if (AbsDIE)
- addDIEEntry(VariableDie, dwarf::DW_AT_abstract_origin, AbsDIE);
- else {
- if (!Name.empty())
- addString(VariableDie, dwarf::DW_AT_name, Name);
- addSourceLine(VariableDie, DV->getVariable());
- addType(VariableDie, DV->getType());
- }
+ if (!validReg)
+ return;
- if (DV->isArtificial())
- addFlag(VariableDie, dwarf::DW_AT_artificial);
+ if (!Location.isReg() && Indirect)
+ addUInt(*Loc, dwarf::DW_FORM_data1, dwarf::DW_OP_deref);
- if (isScopeAbstract) {
- DV->setDIE(VariableDie);
- return VariableDie;
- }
+ // Now attach the location information to the DIE.
+ addBlock(Die, Attribute, Loc);
+}
- // Add variable address.
+/// 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 DbgVariable, starting from the starting
+/// location. Add the DWARF information to the die.
+void DwarfCompileUnit::addComplexAddress(const DbgVariable &DV, DIE &Die,
+ dwarf::Attribute Attribute,
+ const MachineLocation &Location) {
+ DIELoc *Loc = new (DIEValueAllocator) DIELoc();
+ unsigned N = DV.getNumAddrElements();
+ unsigned i = 0;
+ bool validReg;
+ if (Location.isReg()) {
+ if (N >= 2 && DV.getAddrElement(0) == dwarf::DW_OP_plus) {
+ assert(!DV.getVariable().isIndirect() &&
+ "double indirection not handled");
+ // If first address element is OpPlus then emit
+ // DW_OP_breg + Offset instead of DW_OP_reg + Offset.
+ validReg = addRegisterOffset(*Loc, Location.getReg(), DV.getAddrElement(1));
+ i = 2;
+ } else if (N >= 2 && DV.getAddrElement(0) == dwarf::DW_OP_deref) {
+ assert(!DV.getVariable().isIndirect() &&
+ "double indirection not handled");
+ validReg = addRegisterOpPiece(*Loc, Location.getReg(),
+ DV.getExpression().getPieceSize(),
+ DV.getExpression().getPieceOffset());
+ i = 3;
+ } else
+ validReg = addRegisterOpPiece(*Loc, Location.getReg());
+ } else
+ validReg = addRegisterOffset(*Loc, Location.getReg(), Location.getOffset());
- 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);
- return VariableDie;
- }
+ if (!validReg)
+ return;
- // Check if variable is described by a DBG_VALUE instruction.
- if (const MachineInstr *DVInsn = DV->getMInsn()) {
- assert(DVInsn->getNumOperands() == 3);
- if (DVInsn->getOperand(0).isReg()) {
- const MachineOperand RegOp = DVInsn->getOperand(0);
- // If the second operand is an immediate, this is an indirect value.
- if (DVInsn->getOperand(1).isImm()) {
- MachineLocation Location(RegOp.getReg(),
- DVInsn->getOperand(1).getImm());
- addVariableAddress(*DV, VariableDie, Location);
- } else if (RegOp.getReg())
- addVariableAddress(*DV, VariableDie, MachineLocation(RegOp.getReg()));
- } else if (DVInsn->getOperand(0).isImm())
- addConstantValue(VariableDie, DVInsn->getOperand(0), DV->getType());
- else if (DVInsn->getOperand(0).isFPImm())
- addConstantFPValue(VariableDie, DVInsn->getOperand(0));
- else if (DVInsn->getOperand(0).isCImm())
- addConstantValue(VariableDie, DVInsn->getOperand(0).getCImm(),
- isUnsignedDIType(DD, DV->getType()));
+ for (; i < N; ++i) {
+ uint64_t Element = DV.getAddrElement(i);
+ if (Element == dwarf::DW_OP_plus) {
+ addUInt(*Loc, dwarf::DW_FORM_data1, dwarf::DW_OP_plus_uconst);
+ addUInt(*Loc, dwarf::DW_FORM_udata, DV.getAddrElement(++i));
- DV->setDIE(VariableDie);
- return VariableDie;
- } else {
- // .. else use frame index.
- int FI = DV->getFrameIndex();
- if (FI != ~0) {
- unsigned FrameReg = 0;
- const TargetFrameLowering *TFI = Asm->TM.getFrameLowering();
- int Offset = TFI->getFrameIndexReference(*Asm->MF, FI, FrameReg);
- MachineLocation Location(FrameReg, Offset);
- addVariableAddress(*DV, VariableDie, Location);
- }
+ } else if (Element == dwarf::DW_OP_deref) {
+ if (!Location.isReg())
+ addUInt(*Loc, dwarf::DW_FORM_data1, dwarf::DW_OP_deref);
+
+ } else if (Element == dwarf::DW_OP_piece) {
+ const unsigned SizeOfByte = 8;
+ unsigned PieceOffsetInBits = DV.getAddrElement(++i) * SizeOfByte;
+ unsigned PieceSizeInBits = DV.getAddrElement(++i) * SizeOfByte;
+ // Emit DW_OP_bit_piece Size Offset.
+ assert(PieceSizeInBits > 0 && "piece has zero size");
+ addUInt(*Loc, dwarf::DW_FORM_data1, dwarf::DW_OP_bit_piece);
+ addUInt(*Loc, dwarf::DW_FORM_udata, PieceSizeInBits);
+ addUInt(*Loc, dwarf::DW_FORM_udata, PieceOffsetInBits);
+ } else
+ llvm_unreachable("unknown DIBuilder Opcode");
}
- DV->setDIE(VariableDie);
- return VariableDie;
+ // Now attach the location information to the DIE.
+ addBlock(Die, Attribute, Loc);
}
-/// constructMemberDIE - Construct member DIE from DIDerivedType.
-void CompileUnit::constructMemberDIE(DIE &Buffer, DIDerivedType DT) {
- DIE *MemberDie = createAndAddDIE(DT.getTag(), Buffer);
- StringRef Name = DT.getName();
- if (!Name.empty())
- addString(MemberDie, dwarf::DW_AT_name, Name);
-
- addType(MemberDie, resolve(DT.getTypeDerivedFrom()));
-
- addSourceLine(MemberDie, DT);
-
- DIEBlock *MemLocationDie = new (DIEValueAllocator) DIEBlock();
- addUInt(MemLocationDie, dwarf::DW_FORM_data1, dwarf::DW_OP_plus_uconst);
-
- 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, dwarf::DW_FORM_data1, dwarf::DW_OP_dup);
- addUInt(VBaseLocationDie, dwarf::DW_FORM_data1, dwarf::DW_OP_deref);
- addUInt(VBaseLocationDie, dwarf::DW_FORM_data1, dwarf::DW_OP_constu);
- addUInt(VBaseLocationDie, dwarf::DW_FORM_udata, DT.getOffsetInBits());
- addUInt(VBaseLocationDie, dwarf::DW_FORM_data1, dwarf::DW_OP_minus);
- addUInt(VBaseLocationDie, dwarf::DW_FORM_data1, dwarf::DW_OP_deref);
- addUInt(VBaseLocationDie, dwarf::DW_FORM_data1, dwarf::DW_OP_plus);
-
- addBlock(MemberDie, dwarf::DW_AT_data_member_location, VBaseLocationDie);
- } else {
- uint64_t Size = DT.getSizeInBits();
- uint64_t FieldSize = getBaseTypeSize(DD, DT);
- uint64_t OffsetInBytes;
-
- if (Size != FieldSize) {
- // Handle bitfield.
- addUInt(MemberDie, dwarf::DW_AT_byte_size, None,
- getBaseTypeSize(DD, DT) >> 3);
- addUInt(MemberDie, dwarf::DW_AT_bit_size, None, 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->getDataLayout().isLittleEndian())
- Offset = FieldSize - (Offset + Size);
- addUInt(MemberDie, dwarf::DW_AT_bit_offset, None, Offset);
-
- // Here WD_AT_data_member_location points to the anonymous
- // field that includes this bit field.
- OffsetInBytes = FieldOffset >> 3;
- } else
- // This is not a bitfield.
- OffsetInBytes = DT.getOffsetInBits() >> 3;
- addUInt(MemberDie, dwarf::DW_AT_data_member_location, None, OffsetInBytes);
- }
+/// Add a Dwarf loclistptr attribute data and value.
+void DwarfCompileUnit::addLocationList(DIE &Die, dwarf::Attribute Attribute,
+ unsigned Index) {
+ DIEValue *Value = new (DIEValueAllocator) DIELocList(Index);
+ dwarf::Form Form = DD->getDwarfVersion() >= 4 ? dwarf::DW_FORM_sec_offset
+ : dwarf::DW_FORM_data4;
+ Die.addValue(Attribute, Form, Value);
+}
- if (DT.isProtected())
- addUInt(MemberDie, dwarf::DW_AT_accessibility, dwarf::DW_FORM_data1,
- dwarf::DW_ACCESS_protected);
- else if (DT.isPrivate())
- addUInt(MemberDie, dwarf::DW_AT_accessibility, dwarf::DW_FORM_data1,
- dwarf::DW_ACCESS_private);
- // Otherwise C++ member and base classes are considered public.
- else
- addUInt(MemberDie, dwarf::DW_AT_accessibility, dwarf::DW_FORM_data1,
- dwarf::DW_ACCESS_public);
- if (DT.isVirtual())
- addUInt(MemberDie, dwarf::DW_AT_virtuality, dwarf::DW_FORM_data1,
- dwarf::DW_VIRTUALITY_virtual);
-
- // Objective-C properties.
- if (MDNode *PNode = DT.getObjCProperty())
- if (DIEEntry *PropertyDie = getDIEEntry(PNode))
- MemberDie->addValue(dwarf::DW_AT_APPLE_property, dwarf::DW_FORM_ref4,
- PropertyDie);
-
- if (DT.isArtificial())
- addFlag(MemberDie, dwarf::DW_AT_artificial);
+void DwarfCompileUnit::applyVariableAttributes(const DbgVariable &Var,
+ DIE &VariableDie) {
+ StringRef Name = Var.getName();
+ if (!Name.empty())
+ addString(VariableDie, dwarf::DW_AT_name, Name);
+ addSourceLine(VariableDie, Var.getVariable());
+ addType(VariableDie, Var.getType());
+ if (Var.isArtificial())
+ addFlag(VariableDie, dwarf::DW_AT_artificial);
}
-/// getOrCreateStaticMemberDIE - Create new DIE for C++ static member.
-DIE *CompileUnit::getOrCreateStaticMemberDIE(const DIDerivedType DT) {
- if (!DT.Verify())
- return NULL;
-
- // Construct the context before querying for the existence of the DIE in case
- // such construction creates the DIE.
- DIE *ContextDIE = getOrCreateContextDIE(resolve(DT.getContext()));
- assert(dwarf::isType(ContextDIE->getTag()) &&
- "Static member should belong to a type.");
-
- DIE *StaticMemberDIE = getDIE(DT);
- if (StaticMemberDIE)
- return StaticMemberDIE;
-
- StaticMemberDIE = createAndAddDIE(DT.getTag(), *ContextDIE, DT);
-
- DIType Ty = resolve(DT.getTypeDerivedFrom());
-
- addString(StaticMemberDIE, dwarf::DW_AT_name, DT.getName());
- addType(StaticMemberDIE, Ty);
- addSourceLine(StaticMemberDIE, DT);
- addFlag(StaticMemberDIE, dwarf::DW_AT_external);
- addFlag(StaticMemberDIE, dwarf::DW_AT_declaration);
-
- // FIXME: We could omit private if the parent is a class_type, and
- // public if the parent is something else.
- if (DT.isProtected())
- addUInt(StaticMemberDIE, dwarf::DW_AT_accessibility, dwarf::DW_FORM_data1,
- dwarf::DW_ACCESS_protected);
- else if (DT.isPrivate())
- addUInt(StaticMemberDIE, dwarf::DW_AT_accessibility, dwarf::DW_FORM_data1,
- dwarf::DW_ACCESS_private);
- else
- addUInt(StaticMemberDIE, dwarf::DW_AT_accessibility, dwarf::DW_FORM_data1,
- dwarf::DW_ACCESS_public);
+/// Add a Dwarf expression attribute data and value.
+void DwarfCompileUnit::addExpr(DIELoc &Die, dwarf::Form Form,
+ const MCExpr *Expr) {
+ DIEValue *Value = new (DIEValueAllocator) DIEExpr(Expr);
+ Die.addValue((dwarf::Attribute)0, Form, Value);
+}
- if (const ConstantInt *CI = dyn_cast_or_null<ConstantInt>(DT.getConstant()))
- addConstantValue(StaticMemberDIE, CI, isUnsignedDIType(DD, Ty));
- if (const ConstantFP *CFP = dyn_cast_or_null<ConstantFP>(DT.getConstant()))
- addConstantFPValue(StaticMemberDIE, CFP);
+void DwarfCompileUnit::applySubprogramAttributesToDefinition(DISubprogram SP,
+ DIE &SPDie) {
+ DISubprogram SPDecl = SP.getFunctionDeclaration();
+ DIScope Context = resolve(SPDecl ? SPDecl.getContext() : SP.getContext());
+ applySubprogramAttributes(SP, SPDie, includeMinimalInlineScopes());
+ addGlobalName(SP.getName(), SPDie, Context);
+}
- return StaticMemberDIE;
+bool DwarfCompileUnit::isDwoUnit() const {
+ return DD->useSplitDwarf() && Skeleton;
}
-void CompileUnit::emitHeader(const MCSection *ASection,
- const MCSymbol *ASectionSym) {
- Asm->OutStreamer.AddComment("DWARF version number");
- Asm->EmitInt16(DD->getDwarfVersion());
- Asm->OutStreamer.AddComment("Offset Into Abbrev. Section");
- Asm->EmitSectionOffset(Asm->GetTempSymbol(ASection->getLabelBeginName()),
- ASectionSym);
- Asm->OutStreamer.AddComment("Address Size (in bytes)");
- Asm->EmitInt8(Asm->getDataLayout().getPointerSize());
+bool DwarfCompileUnit::includeMinimalInlineScopes() const {
+ return getCUNode().getEmissionKind() == DIBuilder::LineTablesOnly ||
+ (DD->useSplitDwarf() && !Skeleton);
}
+} // end llvm namespace