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 /// CUDie - Compile unit debug information entry.
47 const OwningPtr<DIE> CUDie;
49 /// Asm - Target of Dwarf emission.
52 // Holders for some common dwarf information.
56 /// IndexTyDie - An anonymous type for index type. Owned by CUDie.
59 /// MDNodeToDieMap - Tracks the mapping of unit level debug information
60 /// variables to debug information entries.
61 DenseMap<const MDNode *, DIE *> MDNodeToDieMap;
63 /// MDNodeToDIEEntryMap - Tracks the mapping of unit level debug information
64 /// descriptors to debug information entries using a DIEEntry proxy.
65 DenseMap<const MDNode *, DIEEntry *> MDNodeToDIEEntryMap;
67 /// GlobalNames - A map of globally visible named entities for this unit.
69 StringMap<DIE *> GlobalNames;
71 /// GlobalTypes - A map of globally visible types for this unit.
73 StringMap<DIE *> GlobalTypes;
75 /// AccelNames - A map of names for the name accelerator table.
77 StringMap<std::vector<const DIE *> > AccelNames;
78 StringMap<std::vector<const DIE *> > AccelObjC;
79 StringMap<std::vector<const DIE *> > AccelNamespace;
80 StringMap<std::vector<std::pair<const DIE *, unsigned> > > AccelTypes;
82 /// DIEBlocks - A list of all the DIEBlocks in use.
83 std::vector<DIEBlock *> DIEBlocks;
85 /// ContainingTypeMap - This map is used to keep track of subprogram DIEs that
86 /// need DW_AT_containing_type attribute. This attribute points to a DIE that
87 /// corresponds to the MDNode mapped with the subprogram DIE.
88 DenseMap<DIE *, const MDNode *> ContainingTypeMap;
90 // DIEValueAllocator - All DIEValues are allocated through this allocator.
91 BumpPtrAllocator DIEValueAllocator;
93 // DIEIntegerOne - A preallocated DIEValue because 1 is used frequently.
94 DIEInteger *DIEIntegerOne;
97 CompileUnit(unsigned UID, DIE *D, DICompileUnit CU, AsmPrinter *A,
98 DwarfDebug *DW, DwarfUnits *DWU);
102 unsigned getUniqueID() const { return UniqueID; }
103 uint16_t getLanguage() const { return Node.getLanguage(); }
104 DICompileUnit getNode() const { return Node; }
105 DIE *getCUDie() const { return CUDie.get(); }
106 const StringMap<DIE *> &getGlobalNames() const { return GlobalNames; }
107 const StringMap<DIE *> &getGlobalTypes() const { return GlobalTypes; }
109 const StringMap<std::vector<const DIE *> > &getAccelNames() const {
112 const StringMap<std::vector<const DIE *> > &getAccelObjC() const {
115 const StringMap<std::vector<const DIE *> > &getAccelNamespace() const {
116 return AccelNamespace;
118 const StringMap<std::vector<std::pair<const DIE *, unsigned> > > &
119 getAccelTypes() const {
123 unsigned getDebugInfoOffset() const { return DebugInfoOffset; }
124 void setDebugInfoOffset(unsigned DbgInfoOff) { DebugInfoOffset = DbgInfoOff; }
126 /// hasContent - Return true if this compile unit has something to write out.
128 bool hasContent() const { return !CUDie->getChildren().empty(); }
130 /// getParentContextString - Get a string containing the language specific
131 /// context for a global name.
132 std::string getParentContextString(DIScope Context) const;
134 /// addGlobalName - Add a new global entity to the compile unit.
136 void addGlobalName(StringRef Name, DIE *Die, DIScope Context);
138 /// addGlobalType - Add a new global type to the compile unit.
140 void addGlobalType(DIType Ty);
142 /// addPubTypes - Add a set of types from the subprogram to the global types.
143 void addPubTypes(DISubprogram SP);
145 /// addAccelName - Add a new name to the name accelerator table.
146 void addAccelName(StringRef Name, const DIE *Die);
148 /// addAccelObjC - Add a new name to the ObjC accelerator table.
149 void addAccelObjC(StringRef Name, const DIE *Die);
151 /// addAccelNamespace - Add a new name to the namespace accelerator table.
152 void addAccelNamespace(StringRef Name, const DIE *Die);
154 /// addAccelType - Add a new type to the type accelerator table.
155 void addAccelType(StringRef Name, std::pair<const DIE *, unsigned> Die);
157 /// getDIE - Returns the debug information entry map slot for the
158 /// specified debug variable. We delegate the request to DwarfDebug
159 /// when the MDNode can be part of the type system, since DIEs for
160 /// the type system can be shared across CUs and the mappings are
161 /// kept in DwarfDebug.
162 DIE *getDIE(DIDescriptor D) const;
164 DIEBlock *getDIEBlock() { return new (DIEValueAllocator) DIEBlock(); }
166 /// insertDIE - Insert DIE into the map. We delegate the request to DwarfDebug
167 /// when the MDNode can be part of the type system, since DIEs for
168 /// the type system can be shared across CUs and the mappings are
169 /// kept in DwarfDebug.
170 void insertDIE(DIDescriptor Desc, DIE *D);
172 /// addDie - Adds or interns the DIE to the compile unit.
174 void addDie(DIE *Buffer) { CUDie->addChild(Buffer); }
176 /// addFlag - Add a flag that is true to the DIE.
177 void addFlag(DIE *Die, dwarf::Attribute Attribute);
179 /// addUInt - Add an unsigned integer attribute data and value.
181 void addUInt(DIE *Die, dwarf::Attribute Attribute, Optional<dwarf::Form> Form,
184 void addUInt(DIEBlock *Block, dwarf::Form Form, uint64_t Integer);
186 /// addSInt - Add an signed integer attribute data and value.
188 void addSInt(DIE *Die, dwarf::Attribute Attribute, Optional<dwarf::Form> Form,
191 void addSInt(DIEBlock *Die, Optional<dwarf::Form> Form, int64_t Integer);
193 /// addString - Add a string attribute data and value.
195 void addString(DIE *Die, dwarf::Attribute Attribute, const StringRef Str);
197 /// addLocalString - Add a string attribute data and value.
199 void addLocalString(DIE *Die, dwarf::Attribute Attribute,
200 const StringRef Str);
202 /// addExpr - Add a Dwarf expression attribute data and value.
204 void addExpr(DIEBlock *Die, dwarf::Form Form, const MCExpr *Expr);
206 /// addLabel - Add a Dwarf label attribute data and value.
208 void addLabel(DIE *Die, dwarf::Attribute Attribute, dwarf::Form Form,
209 const MCSymbol *Label);
211 void addLabel(DIEBlock *Die, dwarf::Form Form, const MCSymbol *Label);
213 /// addLabelAddress - Add a dwarf label attribute data and value using
214 /// either DW_FORM_addr or DW_FORM_GNU_addr_index.
216 void addLabelAddress(DIE *Die, dwarf::Attribute Attribute, MCSymbol *Label);
218 /// addOpAddress - Add a dwarf op address data and value using the
219 /// form given and an op of either DW_FORM_addr or DW_FORM_GNU_addr_index.
221 void addOpAddress(DIEBlock *Die, const MCSymbol *Label);
223 /// addDelta - Add a label delta attribute data and value.
225 void addDelta(DIE *Die, dwarf::Attribute Attribute, dwarf::Form Form,
226 const MCSymbol *Hi, const MCSymbol *Lo);
228 /// addDIEEntry - Add a DIE attribute data and value.
230 void addDIEEntry(DIE *Die, dwarf::Attribute Attribute, DIE *Entry);
232 /// addDIEEntry - Add a DIE attribute data and value.
234 void addDIEEntry(DIE *Die, dwarf::Attribute Attribute, DIEEntry *Entry);
236 /// addBlock - Add block data.
238 void addBlock(DIE *Die, dwarf::Attribute Attribute, DIEBlock *Block);
240 /// addSourceLine - Add location information to specified debug information
242 void addSourceLine(DIE *Die, DIVariable V);
243 void addSourceLine(DIE *Die, DIGlobalVariable G);
244 void addSourceLine(DIE *Die, DISubprogram SP);
245 void addSourceLine(DIE *Die, DIType Ty);
246 void addSourceLine(DIE *Die, DINameSpace NS);
247 void addSourceLine(DIE *Die, DIObjCProperty Ty);
249 /// addAddress - Add an address attribute to a die based on the location
251 void addAddress(DIE *Die, dwarf::Attribute Attribute,
252 const MachineLocation &Location, bool Indirect = false);
254 /// addConstantValue - Add constant value entry in variable DIE.
255 void addConstantValue(DIE *Die, const MachineOperand &MO, DIType Ty);
256 void addConstantValue(DIE *Die, const ConstantInt *CI, bool Unsigned);
257 void addConstantValue(DIE *Die, const APInt &Val, bool Unsigned);
259 /// addConstantFPValue - Add constant value entry in variable DIE.
260 void addConstantFPValue(DIE *Die, const MachineOperand &MO);
261 void addConstantFPValue(DIE *Die, const ConstantFP *CFP);
263 /// addTemplateParams - Add template parameters in buffer.
264 void addTemplateParams(DIE &Buffer, DIArray TParams);
266 /// addRegisterOp - Add register operand.
267 void addRegisterOp(DIEBlock *TheDie, unsigned Reg);
269 /// addRegisterOffset - Add register offset.
270 void addRegisterOffset(DIEBlock *TheDie, unsigned Reg, int64_t Offset);
272 /// addComplexAddress - Start with the address based on the location provided,
273 /// and generate the DWARF information necessary to find the actual variable
274 /// (navigating the extra location information encoded in the type) based on
275 /// the starting location. Add the DWARF information to the die.
277 void addComplexAddress(const DbgVariable &DV, DIE *Die,
278 dwarf::Attribute Attribute,
279 const MachineLocation &Location);
281 // FIXME: Should be reformulated in terms of addComplexAddress.
282 /// addBlockByrefAddress - Start with the address based on the location
283 /// provided, and generate the DWARF information necessary to find the
284 /// actual Block variable (navigating the Block struct) based on the
285 /// starting location. Add the DWARF information to the die. Obsolete,
286 /// please use addComplexAddress instead.
288 void addBlockByrefAddress(const DbgVariable &DV, DIE *Die,
289 dwarf::Attribute Attribute,
290 const MachineLocation &Location);
292 /// addVariableAddress - Add DW_AT_location attribute for a
293 /// DbgVariable based on provided MachineLocation.
294 void addVariableAddress(const DbgVariable &DV, DIE *Die,
295 MachineLocation Location);
297 /// addType - Add a new type attribute to the specified entity. This takes
298 /// and attribute parameter because DW_AT_friend attributes are also
300 void addType(DIE *Entity, DIType Ty,
301 dwarf::Attribute Attribute = dwarf::DW_AT_type);
303 /// getOrCreateNameSpace - Create a DIE for DINameSpace.
304 DIE *getOrCreateNameSpace(DINameSpace NS);
306 /// getOrCreateSubprogramDIE - Create new DIE using SP.
307 DIE *getOrCreateSubprogramDIE(DISubprogram SP);
309 /// getOrCreateTypeDIE - Find existing DIE or create new DIE for the
311 DIE *getOrCreateTypeDIE(const MDNode *N);
313 /// getOrCreateContextDIE - Get context owner's DIE.
314 DIE *getOrCreateContextDIE(DIScope Context);
316 /// createGlobalVariableDIE - create global variable DIE.
317 void createGlobalVariableDIE(DIGlobalVariable GV);
319 /// constructContainingTypeDIEs - Construct DIEs for types that contain
321 void constructContainingTypeDIEs();
323 /// constructVariableDIE - Construct a DIE for the given DbgVariable.
324 DIE *constructVariableDIE(DbgVariable &DV, bool isScopeAbstract);
326 /// Create a DIE with the given Tag, add the DIE to its parent, and
327 /// call insertDIE if MD is not null.
328 DIE *createAndAddDIE(unsigned Tag, DIE &Parent,
329 DIDescriptor N = DIDescriptor());
331 /// Compute the size of a header for this unit, not including the initial
333 unsigned getHeaderSize() const {
334 return sizeof(int16_t) + // DWARF version number
335 sizeof(int32_t) + // Offset Into Abbrev. Section
336 sizeof(int8_t); // Pointer Size (in bytes)
339 /// Emit the header for this unit, not including the initial length field.
340 void emitHeader(const MCSection *ASection, const MCSymbol *ASectionSym);
343 /// constructTypeDIE - Construct basic type die from DIBasicType.
344 void constructTypeDIE(DIE &Buffer, DIBasicType BTy);
346 /// constructTypeDIE - Construct derived type die from DIDerivedType.
347 void constructTypeDIE(DIE &Buffer, DIDerivedType DTy);
349 /// constructTypeDIE - Construct type DIE from DICompositeType.
350 void constructTypeDIE(DIE &Buffer, DICompositeType CTy);
352 /// constructSubrangeDIE - Construct subrange DIE from DISubrange.
353 void constructSubrangeDIE(DIE &Buffer, DISubrange SR, DIE *IndexTy);
355 /// constructArrayTypeDIE - Construct array type DIE from DICompositeType.
356 void constructArrayTypeDIE(DIE &Buffer, DICompositeType CTy);
358 /// constructEnumTypeDIE - Construct enum type DIE from DIEnumerator.
359 void constructEnumTypeDIE(DIE &Buffer, DICompositeType CTy);
361 /// constructMemberDIE - Construct member DIE from DIDerivedType.
362 void constructMemberDIE(DIE &Buffer, DIDerivedType DT);
364 /// constructTemplateTypeParameterDIE - Construct new DIE for the given
365 /// DITemplateTypeParameter.
366 void constructTemplateTypeParameterDIE(DIE &Buffer,
367 DITemplateTypeParameter TP);
369 /// constructTemplateValueParameterDIE - Construct new DIE for the given
370 /// DITemplateValueParameter.
371 void constructTemplateValueParameterDIE(DIE &Buffer,
372 DITemplateValueParameter TVP);
374 /// getOrCreateStaticMemberDIE - Create new static data member DIE.
375 DIE *getOrCreateStaticMemberDIE(DIDerivedType DT);
377 /// Offset of the CUDie from beginning of debug info section.
378 unsigned DebugInfoOffset;
380 /// getLowerBoundDefault - Return the default lower bound for an array. If the
381 /// DWARF version doesn't handle the language, return -1.
382 int64_t getDefaultLowerBound() const;
384 /// getDIEEntry - Returns the debug information entry for the specified
386 DIEEntry *getDIEEntry(const MDNode *N) const {
387 return MDNodeToDIEEntryMap.lookup(N);
390 /// insertDIEEntry - Insert debug information entry into the map.
391 void insertDIEEntry(const MDNode *N, DIEEntry *E) {
392 MDNodeToDIEEntryMap.insert(std::make_pair(N, E));
395 // getIndexTyDie - Get an anonymous type for index type.
396 DIE *getIndexTyDie() { return IndexTyDie; }
398 // setIndexTyDie - Set D as anonymous type for index which can be reused
400 void setIndexTyDie(DIE *D) { IndexTyDie = D; }
402 /// createDIEEntry - Creates a new DIEEntry to be a proxy for a debug
403 /// information entry.
404 DIEEntry *createDIEEntry(DIE *Entry);
406 /// resolve - Look in the DwarfDebug map for the MDNode that
407 /// corresponds to the reference.
408 template <typename T> T resolve(DIRef<T> Ref) const {
409 return DD->resolve(Ref);
412 /// If this is a named finished type then include it in the list of types for
413 /// the accelerator tables.
414 void updateAcceleratorTables(DIType Ty, const DIE *TyDIE);
417 } // end llvm namespace