1 //===-- llvm/CodeGen/DwarfCompileUnit.h - Dwarf Compile Unit ---*- C++ -*--===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file contains support for writing dwarf compile unit.
12 //===----------------------------------------------------------------------===//
14 #ifndef CODEGEN_ASMPRINTER_DWARFCOMPILEUNIT_H
15 #define CODEGEN_ASMPRINTER_DWARFCOMPILEUNIT_H
18 #include "DwarfDebug.h"
19 #include "llvm/ADT/DenseMap.h"
20 #include "llvm/ADT/Optional.h"
21 #include "llvm/ADT/OwningPtr.h"
22 #include "llvm/ADT/StringMap.h"
23 #include "llvm/DebugInfo.h"
24 #include "llvm/MC/MCExpr.h"
28 class MachineLocation;
34 //===----------------------------------------------------------------------===//
35 /// CompileUnit - This dwarf writer support class manages information associated
36 /// with a source file.
38 /// UniqueID - a numeric ID unique among all CUs in the module
42 /// Node - MDNode for the compile unit.
45 /// Language - Language for the translation unit associated with this CU.
48 /// CUDie - Compile unit debug information entry.
50 const OwningPtr<DIE> CUDie;
52 /// Asm - Target of Dwarf emission.
55 // Holders for some common dwarf information.
59 /// IndexTyDie - An anonymous type for index type. Owned by CUDie.
62 /// MDNodeToDieMap - Tracks the mapping of unit level debug information
63 /// variables to debug information entries.
64 DenseMap<const MDNode *, DIE *> MDNodeToDieMap;
66 /// MDNodeToDIEEntryMap - Tracks the mapping of unit level debug information
67 /// descriptors to debug information entries using a DIEEntry proxy.
68 DenseMap<const MDNode *, DIEEntry *> MDNodeToDIEEntryMap;
70 /// GlobalNames - A map of globally visible named entities for this unit.
72 StringMap<const DIE *> GlobalNames;
74 /// GlobalTypes - A map of globally visible types for this unit.
76 StringMap<const DIE *> GlobalTypes;
78 /// AccelNames - A map of names for the name accelerator table.
80 StringMap<std::vector<const DIE *> > AccelNames;
81 StringMap<std::vector<const DIE *> > AccelObjC;
82 StringMap<std::vector<const DIE *> > AccelNamespace;
83 StringMap<std::vector<std::pair<const DIE *, unsigned> > > AccelTypes;
85 /// DIEBlocks - A list of all the DIEBlocks in use.
86 std::vector<DIEBlock *> DIEBlocks;
88 /// ContainingTypeMap - This map is used to keep track of subprogram DIEs that
89 /// need DW_AT_containing_type attribute. This attribute points to a DIE that
90 /// corresponds to the MDNode mapped with the subprogram DIE.
91 DenseMap<DIE *, const MDNode *> ContainingTypeMap;
93 // DIEValueAllocator - All DIEValues are allocated through this allocator.
94 BumpPtrAllocator DIEValueAllocator;
96 // DIEIntegerOne - A preallocated DIEValue because 1 is used frequently.
97 DIEInteger *DIEIntegerOne;
100 CompileUnit(unsigned UID, DIE *D, DICompileUnit CU, AsmPrinter *A,
101 DwarfDebug *DW, DwarfUnits *DWU);
102 CompileUnit(unsigned UID, DIE *D, uint16_t Language, AsmPrinter *A,
103 DwarfDebug *DW, DwarfUnits *DWU);
107 unsigned getUniqueID() const { return UniqueID; }
108 uint16_t getLanguage() const { return Language; }
109 DICompileUnit getNode() const { return Node; }
110 DIE *getCUDie() const { return CUDie.get(); }
111 const StringMap<const DIE *> &getGlobalNames() const { return GlobalNames; }
112 const StringMap<const DIE *> &getGlobalTypes() const { return GlobalTypes; }
114 const StringMap<std::vector<const DIE *> > &getAccelNames() const {
117 const StringMap<std::vector<const DIE *> > &getAccelObjC() const {
120 const StringMap<std::vector<const DIE *> > &getAccelNamespace() const {
121 return AccelNamespace;
123 const StringMap<std::vector<std::pair<const DIE *, unsigned> > > &
124 getAccelTypes() const {
128 unsigned getDebugInfoOffset() const { return DebugInfoOffset; }
129 void setDebugInfoOffset(unsigned DbgInfoOff) { DebugInfoOffset = DbgInfoOff; }
131 /// hasContent - Return true if this compile unit has something to write out.
133 bool hasContent() const { return !CUDie->getChildren().empty(); }
135 /// getParentContextString - Get a string containing the language specific
136 /// context for a global name.
137 std::string getParentContextString(DIScope Context) const;
139 /// addGlobalName - Add a new global entity to the compile unit.
141 void addGlobalName(StringRef Name, DIE *Die, DIScope Context);
143 /// addGlobalType - Add a new global type to the compile unit.
145 void addGlobalType(DIType Ty);
147 /// addPubTypes - Add a set of types from the subprogram to the global types.
148 void addPubTypes(DISubprogram SP);
150 /// addAccelName - Add a new name to the name accelerator table.
151 void addAccelName(StringRef Name, const DIE *Die);
153 /// addAccelObjC - Add a new name to the ObjC accelerator table.
154 void addAccelObjC(StringRef Name, const DIE *Die);
156 /// addAccelNamespace - Add a new name to the namespace accelerator table.
157 void addAccelNamespace(StringRef Name, const DIE *Die);
159 /// addAccelType - Add a new type to the type accelerator table.
160 void addAccelType(StringRef Name, std::pair<const DIE *, unsigned> Die);
162 /// getDIE - Returns the debug information entry map slot for the
163 /// specified debug variable. We delegate the request to DwarfDebug
164 /// when the MDNode can be part of the type system, since DIEs for
165 /// the type system can be shared across CUs and the mappings are
166 /// kept in DwarfDebug.
167 DIE *getDIE(DIDescriptor D) const;
169 DIEBlock *getDIEBlock() { return new (DIEValueAllocator) DIEBlock(); }
171 /// insertDIE - Insert DIE into the map. We delegate the request to DwarfDebug
172 /// when the MDNode can be part of the type system, since DIEs for
173 /// the type system can be shared across CUs and the mappings are
174 /// kept in DwarfDebug.
175 void insertDIE(DIDescriptor Desc, DIE *D);
177 /// addDie - Adds or interns the DIE to the compile unit.
179 void addDie(DIE *Buffer) { CUDie->addChild(Buffer); }
181 /// addFlag - Add a flag that is true to the DIE.
182 void addFlag(DIE *Die, dwarf::Attribute Attribute);
184 /// addUInt - Add an unsigned integer attribute data and value.
186 void addUInt(DIE *Die, dwarf::Attribute Attribute, Optional<dwarf::Form> Form,
189 void addUInt(DIEBlock *Block, dwarf::Form Form, uint64_t Integer);
191 /// addSInt - Add an signed integer attribute data and value.
193 void addSInt(DIE *Die, dwarf::Attribute Attribute, Optional<dwarf::Form> Form,
196 void addSInt(DIEBlock *Die, Optional<dwarf::Form> Form, int64_t Integer);
198 /// addString - Add a string attribute data and value.
200 void addString(DIE *Die, dwarf::Attribute Attribute, const StringRef Str);
202 /// addLocalString - Add a string attribute data and value.
204 void addLocalString(DIE *Die, dwarf::Attribute Attribute,
205 const StringRef Str);
207 /// addExpr - Add a Dwarf expression attribute data and value.
209 void addExpr(DIEBlock *Die, dwarf::Form Form, const MCExpr *Expr);
211 /// addLabel - Add a Dwarf label attribute data and value.
213 void addLabel(DIE *Die, dwarf::Attribute Attribute, dwarf::Form Form,
214 const MCSymbol *Label);
216 void addLabel(DIEBlock *Die, dwarf::Form Form, const MCSymbol *Label);
218 /// addLabelAddress - Add a dwarf label attribute data and value using
219 /// either DW_FORM_addr or DW_FORM_GNU_addr_index.
221 void addLabelAddress(DIE *Die, dwarf::Attribute Attribute, MCSymbol *Label);
223 /// addOpAddress - Add a dwarf op address data and value using the
224 /// form given and an op of either DW_FORM_addr or DW_FORM_GNU_addr_index.
226 void addOpAddress(DIEBlock *Die, const MCSymbol *Label);
228 /// addDelta - Add a label delta attribute data and value.
230 void addDelta(DIE *Die, dwarf::Attribute Attribute, dwarf::Form Form,
231 const MCSymbol *Hi, const MCSymbol *Lo);
233 /// addDIEEntry - Add a DIE attribute data and value.
235 void addDIEEntry(DIE *Die, dwarf::Attribute Attribute, DIE *Entry);
237 /// addDIEEntry - Add a DIE attribute data and value.
239 void addDIEEntry(DIE *Die, dwarf::Attribute Attribute, DIEEntry *Entry);
241 /// addBlock - Add block data.
243 void addBlock(DIE *Die, dwarf::Attribute Attribute, DIEBlock *Block);
245 /// addSourceLine - Add location information to specified debug information
247 void addSourceLine(DIE *Die, DIVariable V);
248 void addSourceLine(DIE *Die, DIGlobalVariable G);
249 void addSourceLine(DIE *Die, DISubprogram SP);
250 void addSourceLine(DIE *Die, DIType Ty);
251 void addSourceLine(DIE *Die, DINameSpace NS);
252 void addSourceLine(DIE *Die, DIObjCProperty Ty);
254 /// addAddress - Add an address attribute to a die based on the location
256 void addAddress(DIE *Die, dwarf::Attribute Attribute,
257 const MachineLocation &Location, bool Indirect = false);
259 /// addConstantValue - Add constant value entry in variable DIE.
260 void addConstantValue(DIE *Die, const MachineOperand &MO, DIType Ty);
261 void addConstantValue(DIE *Die, const ConstantInt *CI, bool Unsigned);
262 void addConstantValue(DIE *Die, const APInt &Val, bool Unsigned);
264 /// addConstantFPValue - Add constant value entry in variable DIE.
265 void addConstantFPValue(DIE *Die, const MachineOperand &MO);
266 void addConstantFPValue(DIE *Die, const ConstantFP *CFP);
268 /// addTemplateParams - Add template parameters in buffer.
269 void addTemplateParams(DIE &Buffer, DIArray TParams);
271 /// addRegisterOp - Add register operand.
272 void addRegisterOp(DIEBlock *TheDie, unsigned Reg);
274 /// addRegisterOffset - Add register offset.
275 void addRegisterOffset(DIEBlock *TheDie, unsigned Reg, int64_t Offset);
277 /// addComplexAddress - Start with the address based on the location provided,
278 /// and generate the DWARF information necessary to find the actual variable
279 /// (navigating the extra location information encoded in the type) based on
280 /// the starting location. Add the DWARF information to the die.
282 void addComplexAddress(const DbgVariable &DV, DIE *Die,
283 dwarf::Attribute Attribute,
284 const MachineLocation &Location);
286 // FIXME: Should be reformulated in terms of addComplexAddress.
287 /// addBlockByrefAddress - Start with the address based on the location
288 /// provided, and generate the DWARF information necessary to find the
289 /// actual Block variable (navigating the Block struct) based on the
290 /// starting location. Add the DWARF information to the die. Obsolete,
291 /// please use addComplexAddress instead.
293 void addBlockByrefAddress(const DbgVariable &DV, DIE *Die,
294 dwarf::Attribute Attribute,
295 const MachineLocation &Location);
297 /// addVariableAddress - Add DW_AT_location attribute for a
298 /// DbgVariable based on provided MachineLocation.
299 void addVariableAddress(const DbgVariable &DV, DIE *Die,
300 MachineLocation Location);
302 /// addType - Add a new type attribute to the specified entity. This takes
303 /// and attribute parameter because DW_AT_friend attributes are also
305 void addType(DIE *Entity, DIType Ty,
306 dwarf::Attribute Attribute = dwarf::DW_AT_type);
308 /// getOrCreateNameSpace - Create a DIE for DINameSpace.
309 DIE *getOrCreateNameSpace(DINameSpace NS);
311 /// getOrCreateSubprogramDIE - Create new DIE using SP.
312 DIE *getOrCreateSubprogramDIE(DISubprogram SP);
314 /// getOrCreateTypeDIE - Find existing DIE or create new DIE for the
316 DIE *getOrCreateTypeDIE(const MDNode *N);
318 /// getOrCreateContextDIE - Get context owner's DIE.
319 DIE *createTypeDIE(DICompositeType Ty);
321 /// getOrCreateContextDIE - Get context owner's DIE.
322 DIE *getOrCreateContextDIE(DIScope Context);
324 /// createGlobalVariableDIE - create global variable DIE.
325 void createGlobalVariableDIE(DIGlobalVariable GV);
327 /// constructContainingTypeDIEs - Construct DIEs for types that contain
329 void constructContainingTypeDIEs();
331 /// constructVariableDIE - Construct a DIE for the given DbgVariable.
332 DIE *constructVariableDIE(DbgVariable &DV, bool isScopeAbstract);
334 /// Create a DIE with the given Tag, add the DIE to its parent, and
335 /// call insertDIE if MD is not null.
336 DIE *createAndAddDIE(unsigned Tag, DIE &Parent,
337 DIDescriptor N = DIDescriptor());
339 /// constructTypeDIEImpl - Construct type DIE that is not a type unit
340 /// reference from a DICompositeType.
341 void constructTypeDIEImpl(DIE &Buffer, DICompositeType CTy);
343 /// Compute the size of a header for this unit, not including the initial
345 unsigned getHeaderSize() const {
346 return sizeof(int16_t) + // DWARF version number
347 sizeof(int32_t) + // Offset Into Abbrev. Section
348 sizeof(int8_t); // Pointer Size (in bytes)
351 /// Emit the header for this unit, not including the initial length field.
352 void emitHeader(const MCSection *ASection, const MCSymbol *ASectionSym);
355 /// constructTypeDIE - Construct basic type die from DIBasicType.
356 void constructTypeDIE(DIE &Buffer, DIBasicType BTy);
358 /// constructTypeDIE - Construct derived type die from DIDerivedType.
359 void constructTypeDIE(DIE &Buffer, DIDerivedType DTy);
361 /// constructTypeDIE - Construct type DIE from DICompositeType.
362 void constructTypeDIE(DIE &Buffer, DICompositeType CTy);
364 /// constructSubrangeDIE - Construct subrange DIE from DISubrange.
365 void constructSubrangeDIE(DIE &Buffer, DISubrange SR, DIE *IndexTy);
367 /// constructArrayTypeDIE - Construct array type DIE from DICompositeType.
368 void constructArrayTypeDIE(DIE &Buffer, DICompositeType CTy);
370 /// constructEnumTypeDIE - Construct enum type DIE from DIEnumerator.
371 void constructEnumTypeDIE(DIE &Buffer, DICompositeType CTy);
373 /// constructMemberDIE - Construct member DIE from DIDerivedType.
374 void constructMemberDIE(DIE &Buffer, DIDerivedType DT);
376 /// constructTemplateTypeParameterDIE - Construct new DIE for the given
377 /// DITemplateTypeParameter.
378 void constructTemplateTypeParameterDIE(DIE &Buffer,
379 DITemplateTypeParameter TP);
381 /// constructTemplateValueParameterDIE - Construct new DIE for the given
382 /// DITemplateValueParameter.
383 void constructTemplateValueParameterDIE(DIE &Buffer,
384 DITemplateValueParameter TVP);
386 /// getOrCreateStaticMemberDIE - Create new static data member DIE.
387 DIE *getOrCreateStaticMemberDIE(DIDerivedType DT);
389 /// Offset of the CUDie from beginning of debug info section.
390 unsigned DebugInfoOffset;
392 /// getLowerBoundDefault - Return the default lower bound for an array. If the
393 /// DWARF version doesn't handle the language, return -1.
394 int64_t getDefaultLowerBound() const;
396 /// getDIEEntry - Returns the debug information entry for the specified
398 DIEEntry *getDIEEntry(const MDNode *N) const {
399 return MDNodeToDIEEntryMap.lookup(N);
402 /// insertDIEEntry - Insert debug information entry into the map.
403 void insertDIEEntry(const MDNode *N, DIEEntry *E) {
404 MDNodeToDIEEntryMap.insert(std::make_pair(N, E));
407 // getIndexTyDie - Get an anonymous type for index type.
408 DIE *getIndexTyDie() { return IndexTyDie; }
410 // setIndexTyDie - Set D as anonymous type for index which can be reused
412 void setIndexTyDie(DIE *D) { IndexTyDie = D; }
414 /// createDIEEntry - Creates a new DIEEntry to be a proxy for a debug
415 /// information entry.
416 DIEEntry *createDIEEntry(DIE *Entry);
418 /// resolve - Look in the DwarfDebug map for the MDNode that
419 /// corresponds to the reference.
420 template <typename T> T resolve(DIRef<T> Ref) const {
421 return DD->resolve(Ref);
424 /// If this is a named finished type then include it in the list of types for
425 /// the accelerator tables.
426 void updateAcceleratorTables(DIType Ty, const DIE *TyDIE);
429 } // end llvm namespace