Line data Source code
1 : //===- MCContext.h - Machine Code Context -----------------------*- C++ -*-===//
2 : //
3 : // The LLVM Compiler Infrastructure
4 : //
5 : // This file is distributed under the University of Illinois Open Source
6 : // License. See LICENSE.TXT for details.
7 : //
8 : //===----------------------------------------------------------------------===//
9 :
10 : #ifndef LLVM_MC_MCCONTEXT_H
11 : #define LLVM_MC_MCCONTEXT_H
12 :
13 : #include "llvm/ADT/DenseMap.h"
14 : #include "llvm/ADT/Optional.h"
15 : #include "llvm/ADT/SetVector.h"
16 : #include "llvm/ADT/SmallString.h"
17 : #include "llvm/ADT/SmallVector.h"
18 : #include "llvm/ADT/StringMap.h"
19 : #include "llvm/ADT/StringRef.h"
20 : #include "llvm/ADT/Twine.h"
21 : #include "llvm/BinaryFormat/Dwarf.h"
22 : #include "llvm/MC/MCAsmMacro.h"
23 : #include "llvm/MC/MCDwarf.h"
24 : #include "llvm/MC/MCSubtargetInfo.h"
25 : #include "llvm/MC/SectionKind.h"
26 : #include "llvm/Support/Allocator.h"
27 : #include "llvm/Support/Compiler.h"
28 : #include "llvm/Support/Error.h"
29 : #include "llvm/Support/MD5.h"
30 : #include "llvm/Support/raw_ostream.h"
31 : #include <algorithm>
32 : #include <cassert>
33 : #include <cstddef>
34 : #include <cstdint>
35 : #include <map>
36 : #include <memory>
37 : #include <string>
38 : #include <utility>
39 : #include <vector>
40 :
41 : namespace llvm {
42 :
43 : class CodeViewContext;
44 : class MCAsmInfo;
45 : class MCLabel;
46 : class MCObjectFileInfo;
47 : class MCRegisterInfo;
48 : class MCSection;
49 : class MCSectionCOFF;
50 : class MCSectionELF;
51 : class MCSectionMachO;
52 : class MCSectionWasm;
53 : class MCStreamer;
54 : class MCSymbol;
55 : class MCSymbolELF;
56 : class MCSymbolWasm;
57 : class SMLoc;
58 : class SourceMgr;
59 :
60 : /// Context object for machine code objects. This class owns all of the
61 : /// sections that it creates.
62 : ///
63 : class MCContext {
64 : public:
65 : using SymbolTable = StringMap<MCSymbol *, BumpPtrAllocator &>;
66 :
67 : private:
68 : /// The SourceMgr for this object, if any.
69 : const SourceMgr *SrcMgr;
70 :
71 : /// The SourceMgr for inline assembly, if any.
72 : SourceMgr *InlineSrcMgr;
73 :
74 : /// The MCAsmInfo for this target.
75 : const MCAsmInfo *MAI;
76 :
77 : /// The MCRegisterInfo for this target.
78 : const MCRegisterInfo *MRI;
79 :
80 : /// The MCObjectFileInfo for this target.
81 : const MCObjectFileInfo *MOFI;
82 :
83 : std::unique_ptr<CodeViewContext> CVContext;
84 :
85 : /// Allocator object used for creating machine code objects.
86 : ///
87 : /// We use a bump pointer allocator to avoid the need to track all allocated
88 : /// objects.
89 : BumpPtrAllocator Allocator;
90 :
91 : SpecificBumpPtrAllocator<MCSectionCOFF> COFFAllocator;
92 : SpecificBumpPtrAllocator<MCSectionELF> ELFAllocator;
93 : SpecificBumpPtrAllocator<MCSectionMachO> MachOAllocator;
94 : SpecificBumpPtrAllocator<MCSectionWasm> WasmAllocator;
95 :
96 : /// Bindings of names to symbols.
97 : SymbolTable Symbols;
98 :
99 : /// A mapping from a local label number and an instance count to a symbol.
100 : /// For example, in the assembly
101 : /// 1:
102 : /// 2:
103 : /// 1:
104 : /// We have three labels represented by the pairs (1, 0), (2, 0) and (1, 1)
105 : DenseMap<std::pair<unsigned, unsigned>, MCSymbol *> LocalSymbols;
106 :
107 : /// Keeps tracks of names that were used both for used declared and
108 : /// artificial symbols. The value is "true" if the name has been used for a
109 : /// non-section symbol (there can be at most one of those, plus an unlimited
110 : /// number of section symbols with the same name).
111 : StringMap<bool, BumpPtrAllocator &> UsedNames;
112 :
113 : /// The next ID to dole out to an unnamed assembler temporary symbol with
114 : /// a given prefix.
115 : StringMap<unsigned> NextID;
116 :
117 : /// Instances of directional local labels.
118 : DenseMap<unsigned, MCLabel *> Instances;
119 : /// NextInstance() creates the next instance of the directional local label
120 : /// for the LocalLabelVal and adds it to the map if needed.
121 : unsigned NextInstance(unsigned LocalLabelVal);
122 : /// GetInstance() gets the current instance of the directional local label
123 : /// for the LocalLabelVal and adds it to the map if needed.
124 : unsigned GetInstance(unsigned LocalLabelVal);
125 :
126 : /// The file name of the log file from the environment variable
127 : /// AS_SECURE_LOG_FILE. Which must be set before the .secure_log_unique
128 : /// directive is used or it is an error.
129 : char *SecureLogFile;
130 : /// The stream that gets written to for the .secure_log_unique directive.
131 : std::unique_ptr<raw_fd_ostream> SecureLog;
132 : /// Boolean toggled when .secure_log_unique / .secure_log_reset is seen to
133 : /// catch errors if .secure_log_unique appears twice without
134 : /// .secure_log_reset appearing between them.
135 : bool SecureLogUsed = false;
136 :
137 : /// The compilation directory to use for DW_AT_comp_dir.
138 : SmallString<128> CompilationDir;
139 :
140 : /// Prefix replacement map for source file information.
141 : std::map<const std::string, const std::string> DebugPrefixMap;
142 :
143 : /// The main file name if passed in explicitly.
144 : std::string MainFileName;
145 :
146 : /// The dwarf file and directory tables from the dwarf .file directive.
147 : /// We now emit a line table for each compile unit. To reduce the prologue
148 : /// size of each line table, the files and directories used by each compile
149 : /// unit are separated.
150 : std::map<unsigned, MCDwarfLineTable> MCDwarfLineTablesCUMap;
151 :
152 : /// The current dwarf line information from the last dwarf .loc directive.
153 : MCDwarfLoc CurrentDwarfLoc;
154 : bool DwarfLocSeen = false;
155 :
156 : /// Generate dwarf debugging info for assembly source files.
157 : bool GenDwarfForAssembly = false;
158 :
159 : /// The current dwarf file number when generate dwarf debugging info for
160 : /// assembly source files.
161 : unsigned GenDwarfFileNumber = 0;
162 :
163 : /// Sections for generating the .debug_ranges and .debug_aranges sections.
164 : SetVector<MCSection *> SectionsForRanges;
165 :
166 : /// The information gathered from labels that will have dwarf label
167 : /// entries when generating dwarf assembly source files.
168 : std::vector<MCGenDwarfLabelEntry> MCGenDwarfLabelEntries;
169 :
170 : /// The string to embed in the debug information for the compile unit, if
171 : /// non-empty.
172 : StringRef DwarfDebugFlags;
173 :
174 : /// The string to embed in as the dwarf AT_producer for the compile unit, if
175 : /// non-empty.
176 : StringRef DwarfDebugProducer;
177 :
178 : /// The maximum version of dwarf that we should emit.
179 : uint16_t DwarfVersion = 4;
180 :
181 : /// Honor temporary labels, this is useful for debugging semantic
182 : /// differences between temporary and non-temporary labels (primarily on
183 : /// Darwin).
184 : bool AllowTemporaryLabels = true;
185 : bool UseNamesOnTempLabels = true;
186 :
187 : /// The Compile Unit ID that we are currently processing.
188 : unsigned DwarfCompileUnitID = 0;
189 :
190 2802260 : struct ELFSectionKey {
191 : std::string SectionName;
192 : StringRef GroupName;
193 : unsigned UniqueID;
194 :
195 : ELFSectionKey(StringRef SectionName, StringRef GroupName,
196 : unsigned UniqueID)
197 5604534 : : SectionName(SectionName), GroupName(GroupName), UniqueID(UniqueID) {
198 : }
199 :
200 24065010 : bool operator<(const ELFSectionKey &Other) const {
201 48130020 : if (SectionName != Other.SectionName)
202 23148773 : return SectionName < Other.SectionName;
203 : if (GroupName != Other.GroupName)
204 152 : return GroupName < Other.GroupName;
205 916085 : return UniqueID < Other.UniqueID;
206 : }
207 : };
208 :
209 0 : struct COFFSectionKey {
210 : std::string SectionName;
211 : StringRef GroupName;
212 : int SelectionKey;
213 : unsigned UniqueID;
214 :
215 : COFFSectionKey(StringRef SectionName, StringRef GroupName,
216 : int SelectionKey, unsigned UniqueID)
217 51121 : : SectionName(SectionName), GroupName(GroupName),
218 51121 : SelectionKey(SelectionKey), UniqueID(UniqueID) {}
219 :
220 341187 : bool operator<(const COFFSectionKey &Other) const {
221 682374 : if (SectionName != Other.SectionName)
222 337468 : return SectionName < Other.SectionName;
223 : if (GroupName != Other.GroupName)
224 2505 : return GroupName < Other.GroupName;
225 1214 : if (SelectionKey != Other.SelectionKey)
226 19 : return SelectionKey < Other.SelectionKey;
227 1195 : return UniqueID < Other.UniqueID;
228 : }
229 : };
230 :
231 8735 : struct WasmSectionKey {
232 : std::string SectionName;
233 : StringRef GroupName;
234 : unsigned UniqueID;
235 :
236 : WasmSectionKey(StringRef SectionName, StringRef GroupName,
237 : unsigned UniqueID)
238 17470 : : SectionName(SectionName), GroupName(GroupName), UniqueID(UniqueID) {
239 : }
240 :
241 53717 : bool operator<(const WasmSectionKey &Other) const {
242 107434 : if (SectionName != Other.SectionName)
243 53693 : return SectionName < Other.SectionName;
244 : if (GroupName != Other.GroupName)
245 0 : return GroupName < Other.GroupName;
246 24 : return UniqueID < Other.UniqueID;
247 : }
248 : };
249 :
250 : StringMap<MCSectionMachO *> MachOUniquingMap;
251 : std::map<ELFSectionKey, MCSectionELF *> ELFUniquingMap;
252 : std::map<COFFSectionKey, MCSectionCOFF *> COFFUniquingMap;
253 : std::map<WasmSectionKey, MCSectionWasm *> WasmUniquingMap;
254 : StringMap<bool> RelSecNames;
255 :
256 : SpecificBumpPtrAllocator<MCSubtargetInfo> MCSubtargetAllocator;
257 :
258 : /// Do automatic reset in destructor
259 : bool AutoReset;
260 :
261 : bool HadError = false;
262 :
263 : MCSymbol *createSymbolImpl(const StringMapEntry<bool> *Name,
264 : bool CanBeUnnamed);
265 : MCSymbol *createSymbol(StringRef Name, bool AlwaysAddSuffix,
266 : bool IsTemporary);
267 :
268 : MCSymbol *getOrCreateDirectionalLocalSymbol(unsigned LocalLabelVal,
269 : unsigned Instance);
270 :
271 : MCSectionELF *createELFSectionImpl(StringRef Section, unsigned Type,
272 : unsigned Flags, SectionKind K,
273 : unsigned EntrySize,
274 : const MCSymbolELF *Group,
275 : unsigned UniqueID,
276 : const MCSymbolELF *Associated);
277 :
278 : /// Map of currently defined macros.
279 : StringMap<MCAsmMacro> MacroMap;
280 :
281 : public:
282 : explicit MCContext(const MCAsmInfo *MAI, const MCRegisterInfo *MRI,
283 : const MCObjectFileInfo *MOFI,
284 : const SourceMgr *Mgr = nullptr, bool DoAutoReset = true);
285 : MCContext(const MCContext &) = delete;
286 : MCContext &operator=(const MCContext &) = delete;
287 : ~MCContext();
288 :
289 0 : const SourceMgr *getSourceManager() const { return SrcMgr; }
290 :
291 685 : void setInlineSourceManager(SourceMgr *SM) { InlineSrcMgr = SM; }
292 :
293 0 : const MCAsmInfo *getAsmInfo() const { return MAI; }
294 :
295 0 : const MCRegisterInfo *getRegisterInfo() const { return MRI; }
296 :
297 0 : const MCObjectFileInfo *getObjectFileInfo() const { return MOFI; }
298 :
299 : CodeViewContext &getCVContext();
300 :
301 4 : void setAllowTemporaryLabels(bool Value) { AllowTemporaryLabels = Value; }
302 12002 : void setUseNamesOnTempLabels(bool Value) { UseNamesOnTempLabels = Value; }
303 :
304 : /// \name Module Lifetime Management
305 : /// @{
306 :
307 : /// reset - return object to right after construction state to prepare
308 : /// to process a new module
309 : void reset();
310 :
311 : /// @}
312 :
313 : /// \name Symbol Management
314 : /// @{
315 :
316 : /// Create and return a new linker temporary symbol with a unique but
317 : /// unspecified name.
318 : MCSymbol *createLinkerPrivateTempSymbol();
319 :
320 : /// Create and return a new assembler temporary symbol with a unique but
321 : /// unspecified name.
322 : MCSymbol *createTempSymbol(bool CanBeUnnamed = true);
323 :
324 : MCSymbol *createTempSymbol(const Twine &Name, bool AlwaysAddSuffix,
325 : bool CanBeUnnamed = true);
326 :
327 : /// Create the definition of a directional local symbol for numbered label
328 : /// (used for "1:" definitions).
329 : MCSymbol *createDirectionalLocalSymbol(unsigned LocalLabelVal);
330 :
331 : /// Create and return a directional local symbol for numbered label (used
332 : /// for "1b" or 1f" references).
333 : MCSymbol *getDirectionalLocalSymbol(unsigned LocalLabelVal, bool Before);
334 :
335 : /// Lookup the symbol inside with the specified \p Name. If it exists,
336 : /// return it. If not, create a forward reference and return it.
337 : ///
338 : /// \param Name - The symbol name, which must be unique across all symbols.
339 : MCSymbol *getOrCreateSymbol(const Twine &Name);
340 :
341 : /// Gets a symbol that will be defined to the final stack offset of a local
342 : /// variable after codegen.
343 : ///
344 : /// \param Idx - The index of a local variable passed to \@llvm.localescape.
345 : MCSymbol *getOrCreateFrameAllocSymbol(StringRef FuncName, unsigned Idx);
346 :
347 : MCSymbol *getOrCreateParentFrameOffsetSymbol(StringRef FuncName);
348 :
349 : MCSymbol *getOrCreateLSDASymbol(StringRef FuncName);
350 :
351 : /// Get the symbol for \p Name, or null.
352 : MCSymbol *lookupSymbol(const Twine &Name) const;
353 :
354 : /// Set value for a symbol.
355 : void setSymbolValue(MCStreamer &Streamer, StringRef Sym, uint64_t Val);
356 :
357 : /// getSymbols - Get a reference for the symbol table for clients that
358 : /// want to, for example, iterate over all symbols. 'const' because we
359 : /// still want any modifications to the table itself to use the MCContext
360 : /// APIs.
361 : const SymbolTable &getSymbols() const { return Symbols; }
362 :
363 : /// @}
364 :
365 : /// \name Section Management
366 : /// @{
367 :
368 : enum : unsigned {
369 : /// Pass this value as the UniqueID during section creation to get the
370 : /// generic section with the given name and characteristics. The usual
371 : /// sections such as .text use this ID.
372 : GenericSectionID = ~0U
373 : };
374 :
375 : /// Return the MCSection for the specified mach-o section. This requires
376 : /// the operands to be valid.
377 : MCSectionMachO *getMachOSection(StringRef Segment, StringRef Section,
378 : unsigned TypeAndAttributes,
379 : unsigned Reserved2, SectionKind K,
380 : const char *BeginSymName = nullptr);
381 :
382 : MCSectionMachO *getMachOSection(StringRef Segment, StringRef Section,
383 : unsigned TypeAndAttributes, SectionKind K,
384 : const char *BeginSymName = nullptr) {
385 16827 : return getMachOSection(Segment, Section, TypeAndAttributes, 0, K,
386 : BeginSymName);
387 : }
388 :
389 : MCSectionELF *getELFSection(const Twine &Section, unsigned Type,
390 : unsigned Flags) {
391 311079 : return getELFSection(Section, Type, Flags, 0, "");
392 : }
393 :
394 : MCSectionELF *getELFSection(const Twine &Section, unsigned Type,
395 : unsigned Flags, unsigned EntrySize,
396 : const Twine &Group) {
397 : return getELFSection(Section, Type, Flags, EntrySize, Group, ~0);
398 : }
399 :
400 : MCSectionELF *getELFSection(const Twine &Section, unsigned Type,
401 : unsigned Flags, unsigned EntrySize,
402 : const Twine &Group, unsigned UniqueID) {
403 197521 : return getELFSection(Section, Type, Flags, EntrySize, Group, UniqueID,
404 : nullptr);
405 : }
406 :
407 : MCSectionELF *getELFSection(const Twine &Section, unsigned Type,
408 : unsigned Flags, unsigned EntrySize,
409 : const Twine &Group, unsigned UniqueID,
410 : const MCSymbolELF *Associated);
411 :
412 : MCSectionELF *getELFSection(const Twine &Section, unsigned Type,
413 : unsigned Flags, unsigned EntrySize,
414 : const MCSymbolELF *Group, unsigned UniqueID,
415 : const MCSymbolELF *Associated);
416 :
417 : /// Get a section with the provided group identifier. This section is
418 : /// named by concatenating \p Prefix with '.' then \p Suffix. The \p Type
419 : /// describes the type of the section and \p Flags are used to further
420 : /// configure this named section.
421 : MCSectionELF *getELFNamedSection(const Twine &Prefix, const Twine &Suffix,
422 : unsigned Type, unsigned Flags,
423 : unsigned EntrySize = 0);
424 :
425 : MCSectionELF *createELFRelSection(const Twine &Name, unsigned Type,
426 : unsigned Flags, unsigned EntrySize,
427 : const MCSymbolELF *Group,
428 : const MCSectionELF *RelInfoSection);
429 :
430 : void renameELFSection(MCSectionELF *Section, StringRef Name);
431 :
432 : MCSectionELF *createELFGroupSection(const MCSymbolELF *Group);
433 :
434 : MCSectionCOFF *getCOFFSection(StringRef Section, unsigned Characteristics,
435 : SectionKind Kind, StringRef COMDATSymName,
436 : int Selection,
437 : unsigned UniqueID = GenericSectionID,
438 : const char *BeginSymName = nullptr);
439 :
440 : MCSectionCOFF *getCOFFSection(StringRef Section, unsigned Characteristics,
441 : SectionKind Kind,
442 : const char *BeginSymName = nullptr);
443 :
444 : MCSectionCOFF *getCOFFSection(StringRef Section);
445 :
446 : /// Gets or creates a section equivalent to Sec that is associated with the
447 : /// section containing KeySym. For example, to create a debug info section
448 : /// associated with an inline function, pass the normal debug info section
449 : /// as Sec and the function symbol as KeySym.
450 : MCSectionCOFF *
451 : getAssociativeCOFFSection(MCSectionCOFF *Sec, const MCSymbol *KeySym,
452 : unsigned UniqueID = GenericSectionID);
453 :
454 : MCSectionWasm *getWasmSection(const Twine &Section, SectionKind K) {
455 5569 : return getWasmSection(Section, K, nullptr);
456 : }
457 :
458 : MCSectionWasm *getWasmSection(const Twine &Section, SectionKind K,
459 : const char *BeginSymName) {
460 641 : return getWasmSection(Section, K, "", ~0, BeginSymName);
461 : }
462 :
463 : MCSectionWasm *getWasmSection(const Twine &Section, SectionKind K,
464 : const Twine &Group, unsigned UniqueID) {
465 3166 : return getWasmSection(Section, K, Group, UniqueID, nullptr);
466 : }
467 :
468 : MCSectionWasm *getWasmSection(const Twine &Section, SectionKind K,
469 : const Twine &Group, unsigned UniqueID,
470 : const char *BeginSymName);
471 :
472 : MCSectionWasm *getWasmSection(const Twine &Section, SectionKind K,
473 : const MCSymbolWasm *Group, unsigned UniqueID,
474 : const char *BeginSymName);
475 :
476 : // Create and save a copy of STI and return a reference to the copy.
477 : MCSubtargetInfo &getSubtargetCopy(const MCSubtargetInfo &STI);
478 :
479 : /// @}
480 :
481 : /// \name Dwarf Management
482 : /// @{
483 :
484 : /// Get the compilation directory for DW_AT_comp_dir
485 : /// The compilation directory should be set with \c setCompilationDir before
486 : /// calling this function. If it is unset, an empty string will be returned.
487 : StringRef getCompilationDir() const { return CompilationDir; }
488 :
489 : /// Set the compilation directory for DW_AT_comp_dir
490 8096 : void setCompilationDir(StringRef S) { CompilationDir = S.str(); }
491 :
492 : /// Get the debug prefix map.
493 : const std::map<const std::string, const std::string> &
494 : getDebugPrefixMap() const {
495 : return DebugPrefixMap;
496 : }
497 :
498 : /// Add an entry to the debug prefix map.
499 : void addDebugPrefixMapEntry(const std::string &From, const std::string &To);
500 :
501 : // Remaps all debug directory paths in-place as per the debug prefix map.
502 : void RemapDebugPaths();
503 :
504 : /// Get the main file name for use in error messages and debug
505 : /// info. This can be set to ensure we've got the correct file name
506 : /// after preprocessing or for -save-temps.
507 : const std::string &getMainFileName() const { return MainFileName; }
508 :
509 : /// Set the main file name and override the default.
510 16 : void setMainFileName(StringRef S) { MainFileName = S; }
511 :
512 : /// Creates an entry in the dwarf file and directory tables.
513 : Expected<unsigned> getDwarfFile(StringRef Directory, StringRef FileName,
514 : unsigned FileNumber,
515 : MD5::MD5Result *Checksum,
516 : Optional<StringRef> Source, unsigned CUID);
517 :
518 : bool isValidDwarfFileNumber(unsigned FileNumber, unsigned CUID = 0);
519 :
520 : const std::map<unsigned, MCDwarfLineTable> &getMCDwarfLineTables() const {
521 : return MCDwarfLineTablesCUMap;
522 : }
523 :
524 : MCDwarfLineTable &getMCDwarfLineTable(unsigned CUID) {
525 626154 : return MCDwarfLineTablesCUMap[CUID];
526 : }
527 :
528 : const MCDwarfLineTable &getMCDwarfLineTable(unsigned CUID) const {
529 : auto I = MCDwarfLineTablesCUMap.find(CUID);
530 : assert(I != MCDwarfLineTablesCUMap.end());
531 : return I->second;
532 : }
533 :
534 : const SmallVectorImpl<MCDwarfFile> &getMCDwarfFiles(unsigned CUID = 0) {
535 36 : return getMCDwarfLineTable(CUID).getMCDwarfFiles();
536 : }
537 :
538 : const SmallVectorImpl<std::string> &getMCDwarfDirs(unsigned CUID = 0) {
539 36 : return getMCDwarfLineTable(CUID).getMCDwarfDirs();
540 : }
541 :
542 : bool hasMCLineSections() const {
543 : for (const auto &Table : MCDwarfLineTablesCUMap)
544 : if (!Table.second.getMCDwarfFiles().empty() || Table.second.getLabel())
545 : return true;
546 : return false;
547 : }
548 :
549 0 : unsigned getDwarfCompileUnitID() { return DwarfCompileUnitID; }
550 :
551 0 : void setDwarfCompileUnitID(unsigned CUIndex) {
552 18876 : DwarfCompileUnitID = CUIndex;
553 0 : }
554 :
555 : /// Specifies the "root" file and directory of the compilation unit.
556 : /// These are "file 0" and "directory 0" in DWARF v5.
557 1042 : void setMCLineTableRootFile(unsigned CUID, StringRef CompilationDir,
558 : StringRef Filename, MD5::MD5Result *Checksum,
559 : Optional<StringRef> Source) {
560 1044 : getMCDwarfLineTable(CUID).setRootFile(CompilationDir, Filename, Checksum,
561 : Source);
562 1042 : }
563 :
564 : /// Reports whether MD5 checksum usage is consistent (all-or-none).
565 138 : bool isDwarfMD5UsageConsistent(unsigned CUID) const {
566 138 : return getMCDwarfLineTable(CUID).isMD5UsageConsistent();
567 : }
568 :
569 : /// Saves the information from the currently parsed dwarf .loc directive
570 : /// and sets DwarfLocSeen. When the next instruction is assembled an entry
571 : /// in the line number table with this information and the address of the
572 : /// instruction will be created.
573 : void setCurrentDwarfLoc(unsigned FileNum, unsigned Line, unsigned Column,
574 : unsigned Flags, unsigned Isa,
575 : unsigned Discriminator) {
576 : CurrentDwarfLoc.setFileNum(FileNum);
577 : CurrentDwarfLoc.setLine(Line);
578 : CurrentDwarfLoc.setColumn(Column);
579 : CurrentDwarfLoc.setFlags(Flags);
580 : CurrentDwarfLoc.setIsa(Isa);
581 : CurrentDwarfLoc.setDiscriminator(Discriminator);
582 622487 : DwarfLocSeen = true;
583 : }
584 :
585 1424400 : void clearDwarfLocSeen() { DwarfLocSeen = false; }
586 :
587 0 : bool getDwarfLocSeen() { return DwarfLocSeen; }
588 : const MCDwarfLoc &getCurrentDwarfLoc() { return CurrentDwarfLoc; }
589 :
590 0 : bool getGenDwarfForAssembly() { return GenDwarfForAssembly; }
591 8097 : void setGenDwarfForAssembly(bool Value) { GenDwarfForAssembly = Value; }
592 0 : unsigned getGenDwarfFileNumber() { return GenDwarfFileNumber; }
593 :
594 0 : void setGenDwarfFileNumber(unsigned FileNumber) {
595 12 : GenDwarfFileNumber = FileNumber;
596 0 : }
597 :
598 : const SetVector<MCSection *> &getGenDwarfSectionSyms() {
599 : return SectionsForRanges;
600 : }
601 :
602 : bool addGenDwarfSection(MCSection *Sec) {
603 53 : return SectionsForRanges.insert(Sec);
604 : }
605 :
606 : void finalizeDwarfSections(MCStreamer &MCOS);
607 :
608 : const std::vector<MCGenDwarfLabelEntry> &getMCGenDwarfLabelEntries() const {
609 : return MCGenDwarfLabelEntries;
610 : }
611 :
612 : void addMCGenDwarfLabelEntry(const MCGenDwarfLabelEntry &E) {
613 50 : MCGenDwarfLabelEntries.push_back(E);
614 : }
615 :
616 0 : void setDwarfDebugFlags(StringRef S) { DwarfDebugFlags = S; }
617 0 : StringRef getDwarfDebugFlags() { return DwarfDebugFlags; }
618 :
619 5 : void setDwarfDebugProducer(StringRef S) { DwarfDebugProducer = S; }
620 0 : StringRef getDwarfDebugProducer() { return DwarfDebugProducer; }
621 :
622 0 : dwarf::DwarfFormat getDwarfFormat() const {
623 : // TODO: Support DWARF64
624 0 : return dwarf::DWARF32;
625 : }
626 :
627 35393 : void setDwarfVersion(uint16_t v) { DwarfVersion = v; }
628 0 : uint16_t getDwarfVersion() const { return DwarfVersion; }
629 :
630 : /// @}
631 :
632 0 : char *getSecureLogFile() { return SecureLogFile; }
633 : raw_fd_ostream *getSecureLog() { return SecureLog.get(); }
634 :
635 : void setSecureLog(std::unique_ptr<raw_fd_ostream> Value) {
636 : SecureLog = std::move(Value);
637 : }
638 :
639 0 : bool getSecureLogUsed() { return SecureLogUsed; }
640 0 : void setSecureLogUsed(bool Value) { SecureLogUsed = Value; }
641 :
642 : void *allocate(unsigned Size, unsigned Align = 8) {
643 40907413 : return Allocator.Allocate(Size, Align);
644 : }
645 :
646 : void deallocate(void *Ptr) {}
647 :
648 0 : bool hadError() { return HadError; }
649 : void reportError(SMLoc L, const Twine &Msg);
650 : // Unrecoverable error has occurred. Display the best diagnostic we can
651 : // and bail via exit(1). For now, most MC backend errors are unrecoverable.
652 : // FIXME: We should really do something about that.
653 : LLVM_ATTRIBUTE_NORETURN void reportFatalError(SMLoc L,
654 : const Twine &Msg);
655 :
656 : const MCAsmMacro *lookupMacro(StringRef Name) {
657 1322460 : StringMap<MCAsmMacro>::iterator I = MacroMap.find(Name);
658 2644920 : return (I == MacroMap.end()) ? nullptr : &I->getValue();
659 : }
660 :
661 232 : void defineMacro(StringRef Name, MCAsmMacro Macro) {
662 232 : MacroMap.insert(std::make_pair(Name, std::move(Macro)));
663 232 : }
664 :
665 4 : void undefineMacro(StringRef Name) { MacroMap.erase(Name); }
666 : };
667 :
668 : } // end namespace llvm
669 :
670 : // operator new and delete aren't allowed inside namespaces.
671 : // The throw specifications are mandated by the standard.
672 : /// Placement new for using the MCContext's allocator.
673 : ///
674 : /// This placement form of operator new uses the MCContext's allocator for
675 : /// obtaining memory. It is a non-throwing new, which means that it returns
676 : /// null on error. (If that is what the allocator does. The current does, so if
677 : /// this ever changes, this operator will have to be changed, too.)
678 : /// Usage looks like this (assuming there's an MCContext 'Context' in scope):
679 : /// \code
680 : /// // Default alignment (8)
681 : /// IntegerLiteral *Ex = new (Context) IntegerLiteral(arguments);
682 : /// // Specific alignment
683 : /// IntegerLiteral *Ex2 = new (Context, 4) IntegerLiteral(arguments);
684 : /// \endcode
685 : /// Please note that you cannot use delete on the pointer; it must be
686 : /// deallocated using an explicit destructor call followed by
687 : /// \c Context.Deallocate(Ptr).
688 : ///
689 : /// \param Bytes The number of bytes to allocate. Calculated by the compiler.
690 : /// \param C The MCContext that provides the allocator.
691 : /// \param Alignment The alignment of the allocated memory (if the underlying
692 : /// allocator supports it).
693 : /// \return The allocated memory. Could be NULL.
694 : inline void *operator new(size_t Bytes, llvm::MCContext &C,
695 : size_t Alignment = 8) noexcept {
696 : return C.allocate(Bytes, Alignment);
697 : }
698 : /// Placement delete companion to the new above.
699 : ///
700 : /// This operator is just a companion to the new above. There is no way of
701 : /// invoking it directly; see the new operator for more details. This operator
702 : /// is called implicitly by the compiler if a placement new expression using
703 : /// the MCContext throws in the object constructor.
704 : inline void operator delete(void *Ptr, llvm::MCContext &C, size_t) noexcept {
705 : C.deallocate(Ptr);
706 : }
707 :
708 : /// This placement form of operator new[] uses the MCContext's allocator for
709 : /// obtaining memory. It is a non-throwing new[], which means that it returns
710 : /// null on error.
711 : /// Usage looks like this (assuming there's an MCContext 'Context' in scope):
712 : /// \code
713 : /// // Default alignment (8)
714 : /// char *data = new (Context) char[10];
715 : /// // Specific alignment
716 : /// char *data = new (Context, 4) char[10];
717 : /// \endcode
718 : /// Please note that you cannot use delete on the pointer; it must be
719 : /// deallocated using an explicit destructor call followed by
720 : /// \c Context.Deallocate(Ptr).
721 : ///
722 : /// \param Bytes The number of bytes to allocate. Calculated by the compiler.
723 : /// \param C The MCContext that provides the allocator.
724 : /// \param Alignment The alignment of the allocated memory (if the underlying
725 : /// allocator supports it).
726 : /// \return The allocated memory. Could be NULL.
727 : inline void *operator new[](size_t Bytes, llvm::MCContext &C,
728 : size_t Alignment = 8) noexcept {
729 : return C.allocate(Bytes, Alignment);
730 : }
731 :
732 : /// Placement delete[] companion to the new[] above.
733 : ///
734 : /// This operator is just a companion to the new[] above. There is no way of
735 : /// invoking it directly; see the new[] operator for more details. This operator
736 : /// is called implicitly by the compiler if a placement new[] expression using
737 : /// the MCContext throws in the object constructor.
738 : inline void operator delete[](void *Ptr, llvm::MCContext &C) noexcept {
739 : C.deallocate(Ptr);
740 : }
741 :
742 : #endif // LLVM_MC_MCCONTEXT_H
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