Bug Summary

File:llvm/lib/CodeGen/AsmPrinter/DwarfUnit.cpp
Warning:line 897, column 38
Called C++ object pointer is null

Annotated Source Code

Press '?' to see keyboard shortcuts

clang -cc1 -cc1 -triple x86_64-pc-linux-gnu -analyze -disable-free -disable-llvm-verifier -discard-value-names -main-file-name DwarfUnit.cpp -analyzer-store=region -analyzer-opt-analyze-nested-blocks -analyzer-checker=core -analyzer-checker=apiModeling -analyzer-checker=unix -analyzer-checker=deadcode -analyzer-checker=cplusplus -analyzer-checker=security.insecureAPI.UncheckedReturn -analyzer-checker=security.insecureAPI.getpw -analyzer-checker=security.insecureAPI.gets -analyzer-checker=security.insecureAPI.mktemp -analyzer-checker=security.insecureAPI.mkstemp -analyzer-checker=security.insecureAPI.vfork -analyzer-checker=nullability.NullPassedToNonnull -analyzer-checker=nullability.NullReturnedFromNonnull -analyzer-output plist -w -setup-static-analyzer -analyzer-config-compatibility-mode=true -mrelocation-model pic -pic-level 2 -fhalf-no-semantic-interposition -mframe-pointer=none -fmath-errno -fno-rounding-math -mconstructor-aliases -munwind-tables -target-cpu x86-64 -tune-cpu generic -debugger-tuning=gdb -ffunction-sections -fdata-sections -fcoverage-compilation-dir=/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/build-llvm/lib/CodeGen/AsmPrinter -resource-dir /usr/lib/llvm-13/lib/clang/13.0.0 -D _DEBUG -D _GNU_SOURCE -D __STDC_CONSTANT_MACROS -D __STDC_FORMAT_MACROS -D __STDC_LIMIT_MACROS -I /build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/build-llvm/lib/CodeGen/AsmPrinter -I /build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/llvm/lib/CodeGen/AsmPrinter -I /build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/build-llvm/include -I /build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/llvm/include -U NDEBUG -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/c++/6.3.0 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/x86_64-linux-gnu/c++/6.3.0 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/c++/6.3.0/backward -internal-isystem /usr/lib/llvm-13/lib/clang/13.0.0/include -internal-isystem /usr/local/include -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../x86_64-linux-gnu/include -internal-externc-isystem /usr/include/x86_64-linux-gnu -internal-externc-isystem /include -internal-externc-isystem /usr/include -O2 -Wno-unused-parameter -Wwrite-strings -Wno-missing-field-initializers -Wno-long-long -Wno-maybe-uninitialized -Wno-comment -std=c++14 -fdeprecated-macro -fdebug-compilation-dir=/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/build-llvm/lib/CodeGen/AsmPrinter -fdebug-prefix-map=/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f=. -ferror-limit 19 -fvisibility-inlines-hidden -stack-protector 2 -fgnuc-version=4.2.1 -vectorize-loops -vectorize-slp -analyzer-output=html -analyzer-config stable-report-filename=true -faddrsig -D__GCC_HAVE_DWARF2_CFI_ASM=1 -o /tmp/scan-build-2021-04-14-063029-18377-1 -x c++ /build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/llvm/lib/CodeGen/AsmPrinter/DwarfUnit.cpp
1//===-- llvm/CodeGen/DwarfUnit.cpp - Dwarf Type and Compile Units ---------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8//
9// This file contains support for constructing a dwarf compile unit.
10//
11//===----------------------------------------------------------------------===//
12
13#include "DwarfUnit.h"
14#include "AddressPool.h"
15#include "DwarfCompileUnit.h"
16#include "DwarfExpression.h"
17#include "llvm/ADT/APFloat.h"
18#include "llvm/ADT/APInt.h"
19#include "llvm/ADT/None.h"
20#include "llvm/ADT/StringExtras.h"
21#include "llvm/ADT/iterator_range.h"
22#include "llvm/CodeGen/MachineFunction.h"
23#include "llvm/CodeGen/MachineOperand.h"
24#include "llvm/CodeGen/TargetRegisterInfo.h"
25#include "llvm/CodeGen/TargetSubtargetInfo.h"
26#include "llvm/IR/Constants.h"
27#include "llvm/IR/DataLayout.h"
28#include "llvm/IR/GlobalValue.h"
29#include "llvm/IR/Metadata.h"
30#include "llvm/MC/MCAsmInfo.h"
31#include "llvm/MC/MCContext.h"
32#include "llvm/MC/MCDwarf.h"
33#include "llvm/MC/MCSection.h"
34#include "llvm/MC/MCStreamer.h"
35#include "llvm/MC/MachineLocation.h"
36#include "llvm/Support/Casting.h"
37#include "llvm/Support/CommandLine.h"
38#include "llvm/Target/TargetLoweringObjectFile.h"
39#include <cassert>
40#include <cstdint>
41#include <string>
42#include <utility>
43
44using namespace llvm;
45
46#define DEBUG_TYPE"dwarfdebug" "dwarfdebug"
47
48DIEDwarfExpression::DIEDwarfExpression(const AsmPrinter &AP,
49 DwarfCompileUnit &CU, DIELoc &DIE)
50 : DwarfExpression(AP.getDwarfVersion(), CU), AP(AP), OutDIE(DIE) {}
51
52void DIEDwarfExpression::emitOp(uint8_t Op, const char* Comment) {
53 CU.addUInt(getActiveDIE(), dwarf::DW_FORM_data1, Op);
54}
55
56void DIEDwarfExpression::emitSigned(int64_t Value) {
57 CU.addSInt(getActiveDIE(), dwarf::DW_FORM_sdata, Value);
58}
59
60void DIEDwarfExpression::emitUnsigned(uint64_t Value) {
61 CU.addUInt(getActiveDIE(), dwarf::DW_FORM_udata, Value);
62}
63
64void DIEDwarfExpression::emitData1(uint8_t Value) {
65 CU.addUInt(getActiveDIE(), dwarf::DW_FORM_data1, Value);
66}
67
68void DIEDwarfExpression::emitBaseTypeRef(uint64_t Idx) {
69 CU.addBaseTypeRef(getActiveDIE(), Idx);
70}
71
72void DIEDwarfExpression::enableTemporaryBuffer() {
73 assert(!IsBuffering && "Already buffering?")((!IsBuffering && "Already buffering?") ? static_cast
<void> (0) : __assert_fail ("!IsBuffering && \"Already buffering?\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/llvm/lib/CodeGen/AsmPrinter/DwarfUnit.cpp"
, 73, __PRETTY_FUNCTION__))
;
74 IsBuffering = true;
75}
76
77void DIEDwarfExpression::disableTemporaryBuffer() { IsBuffering = false; }
78
79unsigned DIEDwarfExpression::getTemporaryBufferSize() {
80 return TmpDIE.ComputeSize(&AP);
81}
82
83void DIEDwarfExpression::commitTemporaryBuffer() { OutDIE.takeValues(TmpDIE); }
84
85bool DIEDwarfExpression::isFrameRegister(const TargetRegisterInfo &TRI,
86 llvm::Register MachineReg) {
87 return MachineReg == TRI.getFrameRegister(*AP.MF);
88}
89
90DwarfUnit::DwarfUnit(dwarf::Tag UnitTag, const DICompileUnit *Node,
91 AsmPrinter *A, DwarfDebug *DW, DwarfFile *DWU)
92 : DIEUnit(UnitTag), CUNode(Node), Asm(A), DD(DW), DU(DWU),
93 IndexTyDie(nullptr) {}
94
95DwarfTypeUnit::DwarfTypeUnit(DwarfCompileUnit &CU, AsmPrinter *A,
96 DwarfDebug *DW, DwarfFile *DWU,
97 MCDwarfDwoLineTable *SplitLineTable)
98 : DwarfUnit(dwarf::DW_TAG_type_unit, CU.getCUNode(), A, DW, DWU), CU(CU),
99 SplitLineTable(SplitLineTable) {
100}
101
102DwarfUnit::~DwarfUnit() {
103 for (DIEBlock *B : DIEBlocks)
104 B->~DIEBlock();
105 for (DIELoc *L : DIELocs)
106 L->~DIELoc();
107}
108
109int64_t DwarfUnit::getDefaultLowerBound() const {
110 switch (getLanguage()) {
111 default:
112 break;
113
114 // The languages below have valid values in all DWARF versions.
115 case dwarf::DW_LANG_C:
116 case dwarf::DW_LANG_C89:
117 case dwarf::DW_LANG_C_plus_plus:
118 return 0;
119
120 case dwarf::DW_LANG_Fortran77:
121 case dwarf::DW_LANG_Fortran90:
122 return 1;
123
124 // The languages below have valid values only if the DWARF version >= 3.
125 case dwarf::DW_LANG_C99:
126 case dwarf::DW_LANG_ObjC:
127 case dwarf::DW_LANG_ObjC_plus_plus:
128 if (DD->getDwarfVersion() >= 3)
129 return 0;
130 break;
131
132 case dwarf::DW_LANG_Fortran95:
133 if (DD->getDwarfVersion() >= 3)
134 return 1;
135 break;
136
137 // Starting with DWARF v4, all defined languages have valid values.
138 case dwarf::DW_LANG_D:
139 case dwarf::DW_LANG_Java:
140 case dwarf::DW_LANG_Python:
141 case dwarf::DW_LANG_UPC:
142 if (DD->getDwarfVersion() >= 4)
143 return 0;
144 break;
145
146 case dwarf::DW_LANG_Ada83:
147 case dwarf::DW_LANG_Ada95:
148 case dwarf::DW_LANG_Cobol74:
149 case dwarf::DW_LANG_Cobol85:
150 case dwarf::DW_LANG_Modula2:
151 case dwarf::DW_LANG_Pascal83:
152 case dwarf::DW_LANG_PLI:
153 if (DD->getDwarfVersion() >= 4)
154 return 1;
155 break;
156
157 // The languages below are new in DWARF v5.
158 case dwarf::DW_LANG_BLISS:
159 case dwarf::DW_LANG_C11:
160 case dwarf::DW_LANG_C_plus_plus_03:
161 case dwarf::DW_LANG_C_plus_plus_11:
162 case dwarf::DW_LANG_C_plus_plus_14:
163 case dwarf::DW_LANG_Dylan:
164 case dwarf::DW_LANG_Go:
165 case dwarf::DW_LANG_Haskell:
166 case dwarf::DW_LANG_OCaml:
167 case dwarf::DW_LANG_OpenCL:
168 case dwarf::DW_LANG_RenderScript:
169 case dwarf::DW_LANG_Rust:
170 case dwarf::DW_LANG_Swift:
171 if (DD->getDwarfVersion() >= 5)
172 return 0;
173 break;
174
175 case dwarf::DW_LANG_Fortran03:
176 case dwarf::DW_LANG_Fortran08:
177 case dwarf::DW_LANG_Julia:
178 case dwarf::DW_LANG_Modula3:
179 if (DD->getDwarfVersion() >= 5)
180 return 1;
181 break;
182 }
183
184 return -1;
185}
186
187/// Check whether the DIE for this MDNode can be shared across CUs.
188bool DwarfUnit::isShareableAcrossCUs(const DINode *D) const {
189 // When the MDNode can be part of the type system (this includes subprogram
190 // declarations *and* subprogram definitions, even local definitions), the
191 // DIE must be shared across CUs.
192 // Combining type units and cross-CU DIE sharing is lower value (since
193 // cross-CU DIE sharing is used in LTO and removes type redundancy at that
194 // level already) but may be implementable for some value in projects
195 // building multiple independent libraries with LTO and then linking those
196 // together.
197 if (isDwoUnit() && !DD->shareAcrossDWOCUs())
198 return false;
199 return (isa<DIType>(D) || isa<DISubprogram>(D)) && !DD->generateTypeUnits();
200}
201
202DIE *DwarfUnit::getDIE(const DINode *D) const {
203 if (isShareableAcrossCUs(D))
204 return DU->getDIE(D);
205 return MDNodeToDieMap.lookup(D);
206}
207
208void DwarfUnit::insertDIE(const DINode *Desc, DIE *D) {
209 if (isShareableAcrossCUs(Desc)) {
210 DU->insertDIE(Desc, D);
211 return;
212 }
213 MDNodeToDieMap.insert(std::make_pair(Desc, D));
214}
215
216void DwarfUnit::insertDIE(DIE *D) {
217 MDNodeToDieMap.insert(std::make_pair(nullptr, D));
218}
219
220void DwarfUnit::addFlag(DIE &Die, dwarf::Attribute Attribute) {
221 if (DD->getDwarfVersion() >= 4)
222 Die.addValue(DIEValueAllocator, Attribute, dwarf::DW_FORM_flag_present,
223 DIEInteger(1));
224 else
225 Die.addValue(DIEValueAllocator, Attribute, dwarf::DW_FORM_flag,
226 DIEInteger(1));
227}
228
229void DwarfUnit::addUInt(DIEValueList &Die, dwarf::Attribute Attribute,
230 Optional<dwarf::Form> Form, uint64_t Integer) {
231 if (!Form)
232 Form = DIEInteger::BestForm(false, Integer);
233 assert(Form != dwarf::DW_FORM_implicit_const &&((Form != dwarf::DW_FORM_implicit_const && "DW_FORM_implicit_const is used only for signed integers"
) ? static_cast<void> (0) : __assert_fail ("Form != dwarf::DW_FORM_implicit_const && \"DW_FORM_implicit_const is used only for signed integers\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/llvm/lib/CodeGen/AsmPrinter/DwarfUnit.cpp"
, 234, __PRETTY_FUNCTION__))
234 "DW_FORM_implicit_const is used only for signed integers")((Form != dwarf::DW_FORM_implicit_const && "DW_FORM_implicit_const is used only for signed integers"
) ? static_cast<void> (0) : __assert_fail ("Form != dwarf::DW_FORM_implicit_const && \"DW_FORM_implicit_const is used only for signed integers\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/llvm/lib/CodeGen/AsmPrinter/DwarfUnit.cpp"
, 234, __PRETTY_FUNCTION__))
;
235 Die.addValue(DIEValueAllocator, Attribute, *Form, DIEInteger(Integer));
236}
237
238void DwarfUnit::addUInt(DIEValueList &Block, dwarf::Form Form,
239 uint64_t Integer) {
240 addUInt(Block, (dwarf::Attribute)0, Form, Integer);
241}
242
243void DwarfUnit::addSInt(DIEValueList &Die, dwarf::Attribute Attribute,
244 Optional<dwarf::Form> Form, int64_t Integer) {
245 if (!Form)
246 Form = DIEInteger::BestForm(true, Integer);
247 Die.addValue(DIEValueAllocator, Attribute, *Form, DIEInteger(Integer));
248}
249
250void DwarfUnit::addSInt(DIELoc &Die, Optional<dwarf::Form> Form,
251 int64_t Integer) {
252 addSInt(Die, (dwarf::Attribute)0, Form, Integer);
253}
254
255void DwarfUnit::addString(DIE &Die, dwarf::Attribute Attribute,
256 StringRef String) {
257 if (CUNode->isDebugDirectivesOnly())
258 return;
259
260 if (DD->useInlineStrings()) {
261 Die.addValue(DIEValueAllocator, Attribute, dwarf::DW_FORM_string,
262 new (DIEValueAllocator)
263 DIEInlineString(String, DIEValueAllocator));
264 return;
265 }
266 dwarf::Form IxForm =
267 isDwoUnit() ? dwarf::DW_FORM_GNU_str_index : dwarf::DW_FORM_strp;
268
269 auto StringPoolEntry =
270 useSegmentedStringOffsetsTable() || IxForm == dwarf::DW_FORM_GNU_str_index
271 ? DU->getStringPool().getIndexedEntry(*Asm, String)
272 : DU->getStringPool().getEntry(*Asm, String);
273
274 // For DWARF v5 and beyond, use the smallest strx? form possible.
275 if (useSegmentedStringOffsetsTable()) {
276 IxForm = dwarf::DW_FORM_strx1;
277 unsigned Index = StringPoolEntry.getIndex();
278 if (Index > 0xffffff)
279 IxForm = dwarf::DW_FORM_strx4;
280 else if (Index > 0xffff)
281 IxForm = dwarf::DW_FORM_strx3;
282 else if (Index > 0xff)
283 IxForm = dwarf::DW_FORM_strx2;
284 }
285 Die.addValue(DIEValueAllocator, Attribute, IxForm,
286 DIEString(StringPoolEntry));
287}
288
289DIEValueList::value_iterator DwarfUnit::addLabel(DIEValueList &Die,
290 dwarf::Attribute Attribute,
291 dwarf::Form Form,
292 const MCSymbol *Label) {
293 return Die.addValue(DIEValueAllocator, Attribute, Form, DIELabel(Label));
294}
295
296void DwarfUnit::addLabel(DIELoc &Die, dwarf::Form Form, const MCSymbol *Label) {
297 addLabel(Die, (dwarf::Attribute)0, Form, Label);
298}
299
300void DwarfUnit::addSectionOffset(DIE &Die, dwarf::Attribute Attribute,
301 uint64_t Integer) {
302 addUInt(Die, Attribute, DD->getDwarfSectionOffsetForm(), Integer);
303}
304
305unsigned DwarfTypeUnit::getOrCreateSourceID(const DIFile *File) {
306 if (!SplitLineTable)
307 return getCU().getOrCreateSourceID(File);
308 if (!UsedLineTable) {
309 UsedLineTable = true;
310 // This is a split type unit that needs a line table.
311 addSectionOffset(getUnitDie(), dwarf::DW_AT_stmt_list, 0);
312 }
313 return SplitLineTable->getFile(
314 File->getDirectory(), File->getFilename(), DD->getMD5AsBytes(File),
315 Asm->OutContext.getDwarfVersion(), File->getSource());
316}
317
318void DwarfUnit::addPoolOpAddress(DIEValueList &Die, const MCSymbol *Label) {
319 bool UseAddrOffsetFormOrExpressions =
320 DD->useAddrOffsetForm() || DD->useAddrOffsetExpressions();
321
322 const MCSymbol *Base = nullptr;
323 if (Label->isInSection() && UseAddrOffsetFormOrExpressions)
324 Base = DD->getSectionLabel(&Label->getSection());
325
326 uint32_t Index = DD->getAddressPool().getIndex(Base ? Base : Label);
327
328 if (DD->getDwarfVersion() >= 5) {
329 addUInt(Die, dwarf::DW_FORM_data1, dwarf::DW_OP_addrx);
330 addUInt(Die, dwarf::DW_FORM_addrx, Index);
331 } else {
332 addUInt(Die, dwarf::DW_FORM_data1, dwarf::DW_OP_GNU_addr_index);
333 addUInt(Die, dwarf::DW_FORM_GNU_addr_index, Index);
334 }
335
336 if (Base && Base != Label) {
337 addUInt(Die, dwarf::DW_FORM_data1, dwarf::DW_OP_const4u);
338 addLabelDelta(Die, (dwarf::Attribute)0, Label, Base);
339 addUInt(Die, dwarf::DW_FORM_data1, dwarf::DW_OP_plus);
340 }
341}
342
343void DwarfUnit::addOpAddress(DIELoc &Die, const MCSymbol *Sym) {
344 if (DD->getDwarfVersion() >= 5) {
345 addPoolOpAddress(Die, Sym);
346 return;
347 }
348
349 if (DD->useSplitDwarf()) {
350 addPoolOpAddress(Die, Sym);
351 return;
352 }
353
354 addUInt(Die, dwarf::DW_FORM_data1, dwarf::DW_OP_addr);
355 addLabel(Die, dwarf::DW_FORM_addr, Sym);
356}
357
358void DwarfUnit::addLabelDelta(DIEValueList &Die, dwarf::Attribute Attribute,
359 const MCSymbol *Hi, const MCSymbol *Lo) {
360 Die.addValue(DIEValueAllocator, Attribute, dwarf::DW_FORM_data4,
361 new (DIEValueAllocator) DIEDelta(Hi, Lo));
362}
363
364void DwarfUnit::addDIEEntry(DIE &Die, dwarf::Attribute Attribute, DIE &Entry) {
365 addDIEEntry(Die, Attribute, DIEEntry(Entry));
366}
367
368void DwarfUnit::addDIETypeSignature(DIE &Die, uint64_t Signature) {
369 // Flag the type unit reference as a declaration so that if it contains
370 // members (implicit special members, static data member definitions, member
371 // declarations for definitions in this CU, etc) consumers don't get confused
372 // and think this is a full definition.
373 addFlag(Die, dwarf::DW_AT_declaration);
374
375 Die.addValue(DIEValueAllocator, dwarf::DW_AT_signature,
376 dwarf::DW_FORM_ref_sig8, DIEInteger(Signature));
377}
378
379void DwarfUnit::addDIEEntry(DIE &Die, dwarf::Attribute Attribute,
380 DIEEntry Entry) {
381 const DIEUnit *CU = Die.getUnit();
382 const DIEUnit *EntryCU = Entry.getEntry().getUnit();
383 if (!CU)
384 // We assume that Die belongs to this CU, if it is not linked to any CU yet.
385 CU = getUnitDie().getUnit();
386 if (!EntryCU)
387 EntryCU = getUnitDie().getUnit();
388 Die.addValue(DIEValueAllocator, Attribute,
389 EntryCU == CU ? dwarf::DW_FORM_ref4 : dwarf::DW_FORM_ref_addr,
390 Entry);
391}
392
393DIE &DwarfUnit::createAndAddDIE(unsigned Tag, DIE &Parent, const DINode *N) {
394 DIE &Die = Parent.addChild(DIE::get(DIEValueAllocator, (dwarf::Tag)Tag));
395 if (N)
396 insertDIE(N, &Die);
397 return Die;
398}
399
400void DwarfUnit::addBlock(DIE &Die, dwarf::Attribute Attribute, DIELoc *Loc) {
401 Loc->ComputeSize(Asm);
402 DIELocs.push_back(Loc); // Memoize so we can call the destructor later on.
403 Die.addValue(DIEValueAllocator, Attribute,
404 Loc->BestForm(DD->getDwarfVersion()), Loc);
405}
406
407void DwarfUnit::addBlock(DIE &Die, dwarf::Attribute Attribute, dwarf::Form Form,
408 DIEBlock *Block) {
409 Block->ComputeSize(Asm);
410 DIEBlocks.push_back(Block); // Memoize so we can call the destructor later on.
411 Die.addValue(DIEValueAllocator, Attribute, Form, Block);
412}
413
414void DwarfUnit::addBlock(DIE &Die, dwarf::Attribute Attribute,
415 DIEBlock *Block) {
416 addBlock(Die, Attribute, Block->BestForm(), Block);
417}
418
419void DwarfUnit::addSourceLine(DIE &Die, unsigned Line, const DIFile *File) {
420 if (Line == 0)
421 return;
422
423 unsigned FileID = getOrCreateSourceID(File);
424 addUInt(Die, dwarf::DW_AT_decl_file, None, FileID);
425 addUInt(Die, dwarf::DW_AT_decl_line, None, Line);
426}
427
428void DwarfUnit::addSourceLine(DIE &Die, const DILocalVariable *V) {
429 assert(V)((V) ? static_cast<void> (0) : __assert_fail ("V", "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/llvm/lib/CodeGen/AsmPrinter/DwarfUnit.cpp"
, 429, __PRETTY_FUNCTION__))
;
430
431 addSourceLine(Die, V->getLine(), V->getFile());
432}
433
434void DwarfUnit::addSourceLine(DIE &Die, const DIGlobalVariable *G) {
435 assert(G)((G) ? static_cast<void> (0) : __assert_fail ("G", "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/llvm/lib/CodeGen/AsmPrinter/DwarfUnit.cpp"
, 435, __PRETTY_FUNCTION__))
;
436
437 addSourceLine(Die, G->getLine(), G->getFile());
438}
439
440void DwarfUnit::addSourceLine(DIE &Die, const DISubprogram *SP) {
441 assert(SP)((SP) ? static_cast<void> (0) : __assert_fail ("SP", "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/llvm/lib/CodeGen/AsmPrinter/DwarfUnit.cpp"
, 441, __PRETTY_FUNCTION__))
;
442
443 addSourceLine(Die, SP->getLine(), SP->getFile());
444}
445
446void DwarfUnit::addSourceLine(DIE &Die, const DILabel *L) {
447 assert(L)((L) ? static_cast<void> (0) : __assert_fail ("L", "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/llvm/lib/CodeGen/AsmPrinter/DwarfUnit.cpp"
, 447, __PRETTY_FUNCTION__))
;
448
449 addSourceLine(Die, L->getLine(), L->getFile());
450}
451
452void DwarfUnit::addSourceLine(DIE &Die, const DIType *Ty) {
453 assert(Ty)((Ty) ? static_cast<void> (0) : __assert_fail ("Ty", "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/llvm/lib/CodeGen/AsmPrinter/DwarfUnit.cpp"
, 453, __PRETTY_FUNCTION__))
;
454
455 addSourceLine(Die, Ty->getLine(), Ty->getFile());
456}
457
458void DwarfUnit::addSourceLine(DIE &Die, const DIObjCProperty *Ty) {
459 assert(Ty)((Ty) ? static_cast<void> (0) : __assert_fail ("Ty", "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/llvm/lib/CodeGen/AsmPrinter/DwarfUnit.cpp"
, 459, __PRETTY_FUNCTION__))
;
460
461 addSourceLine(Die, Ty->getLine(), Ty->getFile());
462}
463
464void DwarfUnit::addConstantFPValue(DIE &Die, const ConstantFP *CFP) {
465 // Pass this down to addConstantValue as an unsigned bag of bits.
466 addConstantValue(Die, CFP->getValueAPF().bitcastToAPInt(), true);
467}
468
469void DwarfUnit::addConstantValue(DIE &Die, const ConstantInt *CI,
470 const DIType *Ty) {
471 addConstantValue(Die, CI->getValue(), Ty);
472}
473
474void DwarfUnit::addConstantValue(DIE &Die, uint64_t Val, const DIType *Ty) {
475 addConstantValue(Die, DD->isUnsignedDIType(Ty), Val);
476}
477
478void DwarfUnit::addConstantValue(DIE &Die, bool Unsigned, uint64_t Val) {
479 // FIXME: This is a bit conservative/simple - it emits negative values always
480 // sign extended to 64 bits rather than minimizing the number of bytes.
481 addUInt(Die, dwarf::DW_AT_const_value,
482 Unsigned ? dwarf::DW_FORM_udata : dwarf::DW_FORM_sdata, Val);
483}
484
485void DwarfUnit::addConstantValue(DIE &Die, const APInt &Val, const DIType *Ty) {
486 addConstantValue(Die, Val, DD->isUnsignedDIType(Ty));
487}
488
489void DwarfUnit::addConstantValue(DIE &Die, const APInt &Val, bool Unsigned) {
490 unsigned CIBitWidth = Val.getBitWidth();
491 if (CIBitWidth <= 64) {
492 addConstantValue(Die, Unsigned,
493 Unsigned ? Val.getZExtValue() : Val.getSExtValue());
494 return;
495 }
496
497 DIEBlock *Block = new (DIEValueAllocator) DIEBlock;
498
499 // Get the raw data form of the large APInt.
500 const uint64_t *Ptr64 = Val.getRawData();
501
502 int NumBytes = Val.getBitWidth() / 8; // 8 bits per byte.
503 bool LittleEndian = Asm->getDataLayout().isLittleEndian();
504
505 // Output the constant to DWARF one byte at a time.
506 for (int i = 0; i < NumBytes; i++) {
507 uint8_t c;
508 if (LittleEndian)
509 c = Ptr64[i / 8] >> (8 * (i & 7));
510 else
511 c = Ptr64[(NumBytes - 1 - i) / 8] >> (8 * ((NumBytes - 1 - i) & 7));
512 addUInt(*Block, dwarf::DW_FORM_data1, c);
513 }
514
515 addBlock(Die, dwarf::DW_AT_const_value, Block);
516}
517
518void DwarfUnit::addLinkageName(DIE &Die, StringRef LinkageName) {
519 if (!LinkageName.empty())
520 addString(Die,
521 DD->getDwarfVersion() >= 4 ? dwarf::DW_AT_linkage_name
522 : dwarf::DW_AT_MIPS_linkage_name,
523 GlobalValue::dropLLVMManglingEscape(LinkageName));
524}
525
526void DwarfUnit::addTemplateParams(DIE &Buffer, DINodeArray TParams) {
527 // Add template parameters.
528 for (const auto *Element : TParams) {
529 if (auto *TTP = dyn_cast<DITemplateTypeParameter>(Element))
530 constructTemplateTypeParameterDIE(Buffer, TTP);
531 else if (auto *TVP = dyn_cast<DITemplateValueParameter>(Element))
532 constructTemplateValueParameterDIE(Buffer, TVP);
533 }
534}
535
536/// Add thrown types.
537void DwarfUnit::addThrownTypes(DIE &Die, DINodeArray ThrownTypes) {
538 for (const auto *Ty : ThrownTypes) {
539 DIE &TT = createAndAddDIE(dwarf::DW_TAG_thrown_type, Die);
540 addType(TT, cast<DIType>(Ty));
541 }
542}
543
544DIE *DwarfUnit::getOrCreateContextDIE(const DIScope *Context) {
545 if (!Context || isa<DIFile>(Context))
546 return &getUnitDie();
547 if (auto *T = dyn_cast<DIType>(Context))
548 return getOrCreateTypeDIE(T);
549 if (auto *NS = dyn_cast<DINamespace>(Context))
550 return getOrCreateNameSpace(NS);
551 if (auto *SP = dyn_cast<DISubprogram>(Context))
552 return getOrCreateSubprogramDIE(SP);
553 if (auto *M = dyn_cast<DIModule>(Context))
554 return getOrCreateModule(M);
555 return getDIE(Context);
556}
557
558DIE *DwarfUnit::createTypeDIE(const DICompositeType *Ty) {
559 auto *Context = Ty->getScope();
560 DIE *ContextDIE = getOrCreateContextDIE(Context);
561
562 if (DIE *TyDIE = getDIE(Ty))
4
Assuming 'TyDIE' is null
5
Taking false branch
563 return TyDIE;
564
565 // Create new type.
566 DIE &TyDIE = createAndAddDIE(Ty->getTag(), *ContextDIE, Ty);
567
568 constructTypeDIE(TyDIE, cast<DICompositeType>(Ty));
6
'Ty' is a 'DICompositeType'
7
Calling 'DwarfUnit::constructTypeDIE'
569
570 updateAcceleratorTables(Context, Ty, TyDIE);
571 return &TyDIE;
572}
573
574DIE *DwarfUnit::createTypeDIE(const DIScope *Context, DIE &ContextDIE,
575 const DIType *Ty) {
576 // Create new type.
577 DIE &TyDIE = createAndAddDIE(Ty->getTag(), ContextDIE, Ty);
578
579 updateAcceleratorTables(Context, Ty, TyDIE);
580
581 if (auto *BT = dyn_cast<DIBasicType>(Ty))
582 constructTypeDIE(TyDIE, BT);
583 else if (auto *ST = dyn_cast<DIStringType>(Ty))
584 constructTypeDIE(TyDIE, ST);
585 else if (auto *STy = dyn_cast<DISubroutineType>(Ty))
586 constructTypeDIE(TyDIE, STy);
587 else if (auto *CTy = dyn_cast<DICompositeType>(Ty)) {
588 if (DD->generateTypeUnits() && !Ty->isForwardDecl() &&
589 (Ty->getRawName() || CTy->getRawIdentifier())) {
590 // Skip updating the accelerator tables since this is not the full type.
591 if (MDString *TypeId = CTy->getRawIdentifier())
592 DD->addDwarfTypeUnitType(getCU(), TypeId->getString(), TyDIE, CTy);
593 else {
594 auto X = DD->enterNonTypeUnitContext();
595 finishNonUnitTypeDIE(TyDIE, CTy);
596 }
597 return &TyDIE;
598 }
599 constructTypeDIE(TyDIE, CTy);
600 } else {
601 constructTypeDIE(TyDIE, cast<DIDerivedType>(Ty));
602 }
603
604 return &TyDIE;
605}
606
607DIE *DwarfUnit::getOrCreateTypeDIE(const MDNode *TyNode) {
608 if (!TyNode)
609 return nullptr;
610
611 auto *Ty = cast<DIType>(TyNode);
612
613 // DW_TAG_restrict_type is not supported in DWARF2
614 if (Ty->getTag() == dwarf::DW_TAG_restrict_type && DD->getDwarfVersion() <= 2)
615 return getOrCreateTypeDIE(cast<DIDerivedType>(Ty)->getBaseType());
616
617 // DW_TAG_atomic_type is not supported in DWARF < 5
618 if (Ty->getTag() == dwarf::DW_TAG_atomic_type && DD->getDwarfVersion() < 5)
619 return getOrCreateTypeDIE(cast<DIDerivedType>(Ty)->getBaseType());
620
621 // Construct the context before querying for the existence of the DIE in case
622 // such construction creates the DIE.
623 auto *Context = Ty->getScope();
624 DIE *ContextDIE = getOrCreateContextDIE(Context);
625 assert(ContextDIE)((ContextDIE) ? static_cast<void> (0) : __assert_fail (
"ContextDIE", "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/llvm/lib/CodeGen/AsmPrinter/DwarfUnit.cpp"
, 625, __PRETTY_FUNCTION__))
;
626
627 if (DIE *TyDIE = getDIE(Ty))
628 return TyDIE;
629
630 return static_cast<DwarfUnit *>(ContextDIE->getUnit())
631 ->createTypeDIE(Context, *ContextDIE, Ty);
632}
633
634void DwarfUnit::updateAcceleratorTables(const DIScope *Context,
635 const DIType *Ty, const DIE &TyDIE) {
636 if (!Ty->getName().empty() && !Ty->isForwardDecl()) {
637 bool IsImplementation = false;
638 if (auto *CT = dyn_cast<DICompositeType>(Ty)) {
639 // A runtime language of 0 actually means C/C++ and that any
640 // non-negative value is some version of Objective-C/C++.
641 IsImplementation = CT->getRuntimeLang() == 0 || CT->isObjcClassComplete();
642 }
643 unsigned Flags = IsImplementation ? dwarf::DW_FLAG_type_implementation : 0;
644 DD->addAccelType(*CUNode, Ty->getName(), TyDIE, Flags);
645
646 if (!Context || isa<DICompileUnit>(Context) || isa<DIFile>(Context) ||
647 isa<DINamespace>(Context) || isa<DICommonBlock>(Context))
648 addGlobalType(Ty, TyDIE, Context);
649 }
650}
651
652void DwarfUnit::addType(DIE &Entity, const DIType *Ty,
653 dwarf::Attribute Attribute) {
654 assert(Ty && "Trying to add a type that doesn't exist?")((Ty && "Trying to add a type that doesn't exist?") ?
static_cast<void> (0) : __assert_fail ("Ty && \"Trying to add a type that doesn't exist?\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/llvm/lib/CodeGen/AsmPrinter/DwarfUnit.cpp"
, 654, __PRETTY_FUNCTION__))
;
655 addDIEEntry(Entity, Attribute, DIEEntry(*getOrCreateTypeDIE(Ty)));
656}
657
658std::string DwarfUnit::getParentContextString(const DIScope *Context) const {
659 if (!Context)
660 return "";
661
662 // FIXME: Decide whether to implement this for non-C++ languages.
663 if (!dwarf::isCPlusPlus((dwarf::SourceLanguage)getLanguage()))
664 return "";
665
666 std::string CS;
667 SmallVector<const DIScope *, 1> Parents;
668 while (!isa<DICompileUnit>(Context)) {
669 Parents.push_back(Context);
670 if (const DIScope *S = Context->getScope())
671 Context = S;
672 else
673 // Structure, etc types will have a NULL context if they're at the top
674 // level.
675 break;
676 }
677
678 // Reverse iterate over our list to go from the outermost construct to the
679 // innermost.
680 for (const DIScope *Ctx : make_range(Parents.rbegin(), Parents.rend())) {
681 StringRef Name = Ctx->getName();
682 if (Name.empty() && isa<DINamespace>(Ctx))
683 Name = "(anonymous namespace)";
684 if (!Name.empty()) {
685 CS += Name;
686 CS += "::";
687 }
688 }
689 return CS;
690}
691
692void DwarfUnit::constructTypeDIE(DIE &Buffer, const DIBasicType *BTy) {
693 // Get core information.
694 StringRef Name = BTy->getName();
695 // Add name if not anonymous or intermediate type.
696 if (!Name.empty())
697 addString(Buffer, dwarf::DW_AT_name, Name);
698
699 // An unspecified type only has a name attribute.
700 if (BTy->getTag() == dwarf::DW_TAG_unspecified_type)
701 return;
702
703 if (BTy->getTag() != dwarf::DW_TAG_string_type)
704 addUInt(Buffer, dwarf::DW_AT_encoding, dwarf::DW_FORM_data1,
705 BTy->getEncoding());
706
707 uint64_t Size = BTy->getSizeInBits() >> 3;
708 addUInt(Buffer, dwarf::DW_AT_byte_size, None, Size);
709
710 if (BTy->isBigEndian())
711 addUInt(Buffer, dwarf::DW_AT_endianity, None, dwarf::DW_END_big);
712 else if (BTy->isLittleEndian())
713 addUInt(Buffer, dwarf::DW_AT_endianity, None, dwarf::DW_END_little);
714}
715
716void DwarfUnit::constructTypeDIE(DIE &Buffer, const DIStringType *STy) {
717 // Get core information.
718 StringRef Name = STy->getName();
719 // Add name if not anonymous or intermediate type.
720 if (!Name.empty())
721 addString(Buffer, dwarf::DW_AT_name, Name);
722
723 if (DIVariable *Var = STy->getStringLength()) {
724 if (auto *VarDIE = getDIE(Var))
725 addDIEEntry(Buffer, dwarf::DW_AT_string_length, *VarDIE);
726 } else if (DIExpression *Expr = STy->getStringLengthExp()) {
727 DIELoc *Loc = new (DIEValueAllocator) DIELoc;
728 DIEDwarfExpression DwarfExpr(*Asm, getCU(), *Loc);
729 // This is to describe the memory location of the
730 // length of a Fortran deferred length string, so
731 // lock it down as such.
732 DwarfExpr.setMemoryLocationKind();
733 DwarfExpr.addExpression(Expr);
734 addBlock(Buffer, dwarf::DW_AT_string_length, DwarfExpr.finalize());
735 } else {
736 uint64_t Size = STy->getSizeInBits() >> 3;
737 addUInt(Buffer, dwarf::DW_AT_byte_size, None, Size);
738 }
739
740 if (STy->getEncoding()) {
741 // For eventual Unicode support.
742 addUInt(Buffer, dwarf::DW_AT_encoding, dwarf::DW_FORM_data1,
743 STy->getEncoding());
744 }
745}
746
747void DwarfUnit::constructTypeDIE(DIE &Buffer, const DIDerivedType *DTy) {
748 // Get core information.
749 StringRef Name = DTy->getName();
750 uint64_t Size = DTy->getSizeInBits() >> 3;
751 uint16_t Tag = Buffer.getTag();
752
753 // Map to main type, void will not have a type.
754 const DIType *FromTy = DTy->getBaseType();
755 if (FromTy)
756 addType(Buffer, FromTy);
757
758 // Add name if not anonymous or intermediate type.
759 if (!Name.empty())
760 addString(Buffer, dwarf::DW_AT_name, Name);
761
762 // If alignment is specified for a typedef , create and insert DW_AT_alignment
763 // attribute in DW_TAG_typedef DIE.
764 if (Tag == dwarf::DW_TAG_typedef && DD->getDwarfVersion() >= 5) {
765 uint32_t AlignInBytes = DTy->getAlignInBytes();
766 if (AlignInBytes > 0)
767 addUInt(Buffer, dwarf::DW_AT_alignment, dwarf::DW_FORM_udata,
768 AlignInBytes);
769 }
770
771 // Add size if non-zero (derived types might be zero-sized.)
772 if (Size && Tag != dwarf::DW_TAG_pointer_type
773 && Tag != dwarf::DW_TAG_ptr_to_member_type
774 && Tag != dwarf::DW_TAG_reference_type
775 && Tag != dwarf::DW_TAG_rvalue_reference_type)
776 addUInt(Buffer, dwarf::DW_AT_byte_size, None, Size);
777
778 if (Tag == dwarf::DW_TAG_ptr_to_member_type)
779 addDIEEntry(Buffer, dwarf::DW_AT_containing_type,
780 *getOrCreateTypeDIE(cast<DIDerivedType>(DTy)->getClassType()));
781 // Add source line info if available and TyDesc is not a forward declaration.
782 if (!DTy->isForwardDecl())
783 addSourceLine(Buffer, DTy);
784
785 // If DWARF address space value is other than None, add it. The IR
786 // verifier checks that DWARF address space only exists for pointer
787 // or reference types.
788 if (DTy->getDWARFAddressSpace())
789 addUInt(Buffer, dwarf::DW_AT_address_class, dwarf::DW_FORM_data4,
790 DTy->getDWARFAddressSpace().getValue());
791}
792
793void DwarfUnit::constructSubprogramArguments(DIE &Buffer, DITypeRefArray Args) {
794 for (unsigned i = 1, N = Args.size(); i < N; ++i) {
795 const DIType *Ty = Args[i];
796 if (!Ty) {
797 assert(i == N-1 && "Unspecified parameter must be the last argument")((i == N-1 && "Unspecified parameter must be the last argument"
) ? static_cast<void> (0) : __assert_fail ("i == N-1 && \"Unspecified parameter must be the last argument\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/llvm/lib/CodeGen/AsmPrinter/DwarfUnit.cpp"
, 797, __PRETTY_FUNCTION__))
;
798 createAndAddDIE(dwarf::DW_TAG_unspecified_parameters, Buffer);
799 } else {
800 DIE &Arg = createAndAddDIE(dwarf::DW_TAG_formal_parameter, Buffer);
801 addType(Arg, Ty);
802 if (Ty->isArtificial())
803 addFlag(Arg, dwarf::DW_AT_artificial);
804 }
805 }
806}
807
808void DwarfUnit::constructTypeDIE(DIE &Buffer, const DISubroutineType *CTy) {
809 // Add return type. A void return won't have a type.
810 auto Elements = cast<DISubroutineType>(CTy)->getTypeArray();
811 if (Elements.size())
812 if (auto RTy = Elements[0])
813 addType(Buffer, RTy);
814
815 bool isPrototyped = true;
816 if (Elements.size() == 2 && !Elements[1])
817 isPrototyped = false;
818
819 constructSubprogramArguments(Buffer, Elements);
820
821 // Add prototype flag if we're dealing with a C language and the function has
822 // been prototyped.
823 uint16_t Language = getLanguage();
824 if (isPrototyped &&
825 (Language == dwarf::DW_LANG_C89 || Language == dwarf::DW_LANG_C99 ||
826 Language == dwarf::DW_LANG_ObjC))
827 addFlag(Buffer, dwarf::DW_AT_prototyped);
828
829 // Add a DW_AT_calling_convention if this has an explicit convention.
830 if (CTy->getCC() && CTy->getCC() != dwarf::DW_CC_normal)
831 addUInt(Buffer, dwarf::DW_AT_calling_convention, dwarf::DW_FORM_data1,
832 CTy->getCC());
833
834 if (CTy->isLValueReference())
835 addFlag(Buffer, dwarf::DW_AT_reference);
836
837 if (CTy->isRValueReference())
838 addFlag(Buffer, dwarf::DW_AT_rvalue_reference);
839}
840
841void DwarfUnit::constructTypeDIE(DIE &Buffer, const DICompositeType *CTy) {
842 // Add name if not anonymous or intermediate type.
843 StringRef Name = CTy->getName();
844
845 uint64_t Size = CTy->getSizeInBits() >> 3;
846 uint16_t Tag = Buffer.getTag();
847
848 switch (Tag) {
8
Control jumps to 'case DW_TAG_variant_part:' at line 855
25
Control jumps to 'case DW_TAG_variant_part:' at line 855
43
Control jumps to 'case DW_TAG_variant_part:' at line 855
849 case dwarf::DW_TAG_array_type:
850 constructArrayTypeDIE(Buffer, CTy);
851 break;
852 case dwarf::DW_TAG_enumeration_type:
853 constructEnumTypeDIE(Buffer, CTy);
854 break;
855 case dwarf::DW_TAG_variant_part:
856 case dwarf::DW_TAG_structure_type:
857 case dwarf::DW_TAG_union_type:
858 case dwarf::DW_TAG_class_type: {
859 // Emit the discriminator for a variant part.
860 DIDerivedType *Discriminator = nullptr;
861 if (Tag
8.1
'Tag' is equal to DW_TAG_variant_part
25.1
'Tag' is equal to DW_TAG_variant_part
43.1
'Tag' is equal to DW_TAG_variant_part
== dwarf::DW_TAG_variant_part) {
9
Taking true branch
26
Taking true branch
44
Taking true branch
862 Discriminator = CTy->getDiscriminator();
45
Value assigned to 'Discriminator'
863 if (Discriminator
9.1
'Discriminator' is non-null
) {
10
Taking true branch
27
Assuming 'Discriminator' is null
28
Taking false branch
46
Assuming 'Discriminator' is null
47
Taking false branch
864 // DWARF says:
865 // If the variant part has a discriminant, the discriminant is
866 // represented by a separate debugging information entry which is
867 // a child of the variant part entry.
868 DIE &DiscMember = constructMemberDIE(Buffer, Discriminator);
869 addDIEEntry(Buffer, dwarf::DW_AT_discr, DiscMember);
870 }
871 }
872
873 // Add template parameters to a class, structure or union types.
874 if (Tag
10.1
'Tag' is not equal to DW_TAG_class_type
28.1
'Tag' is not equal to DW_TAG_class_type
47.1
'Tag' is not equal to DW_TAG_class_type
== dwarf::DW_TAG_class_type ||
11
Taking false branch
29
Taking false branch
48
Taking false branch
875 Tag
10.2
'Tag' is not equal to DW_TAG_structure_type
28.2
'Tag' is not equal to DW_TAG_structure_type
47.2
'Tag' is not equal to DW_TAG_structure_type
== dwarf::DW_TAG_structure_type || Tag
10.3
'Tag' is not equal to DW_TAG_union_type
28.3
'Tag' is not equal to DW_TAG_union_type
47.3
'Tag' is not equal to DW_TAG_union_type
== dwarf::DW_TAG_union_type)
876 addTemplateParams(Buffer, CTy->getTemplateParams());
877
878 // Add elements to structure type.
879 DINodeArray Elements = CTy->getElements();
880 for (const auto *Element : Elements) {
881 if (!Element)
12
Assuming 'Element' is non-null
13
Taking false branch
30
Assuming 'Element' is non-null
31
Taking false branch
49
Assuming 'Element' is non-null
50
Taking false branch
882 continue;
883 if (auto *SP
14.1
'SP' is null
32.1
'SP' is null
51.1
'SP' is null
= dyn_cast<DISubprogram>(Element))
14
Assuming 'Element' is not a 'DISubprogram'
15
Taking false branch
32
Assuming 'Element' is not a 'DISubprogram'
33
Taking false branch
51
Assuming 'Element' is not a 'DISubprogram'
52
Taking false branch
884 getOrCreateSubprogramDIE(SP);
885 else if (auto *DDTy
16.1
'DDTy' is null
34.1
'DDTy' is null
53.1
'DDTy' is non-null
= dyn_cast<DIDerivedType>(Element)) {
16
Assuming 'Element' is not a 'DIDerivedType'
17
Taking false branch
34
Assuming 'Element' is not a 'DIDerivedType'
35
Taking false branch
53
Assuming 'Element' is a 'DIDerivedType'
54
Taking true branch
886 if (DDTy->getTag() == dwarf::DW_TAG_friend) {
55
Assuming the condition is false
56
Taking false branch
887 DIE &ElemDie = createAndAddDIE(dwarf::DW_TAG_friend, Buffer);
888 addType(ElemDie, DDTy->getBaseType(), dwarf::DW_AT_friend);
889 } else if (DDTy->isStaticMember()) {
57
Assuming the condition is false
58
Taking false branch
890 getOrCreateStaticMemberDIE(DDTy);
891 } else if (Tag
58.1
'Tag' is equal to DW_TAG_variant_part
== dwarf::DW_TAG_variant_part) {
59
Taking true branch
892 // When emitting a variant part, wrap each member in
893 // DW_TAG_variant.
894 DIE &Variant = createAndAddDIE(dwarf::DW_TAG_variant, Buffer);
895 if (const ConstantInt *CI
60.1
'CI' is non-null
=
61
Taking true branch
896 dyn_cast_or_null<ConstantInt>(DDTy->getDiscriminantValue())) {
60
Assuming the object is a 'ConstantInt'
897 if (DD->isUnsignedDIType(Discriminator->getBaseType()))
62
Called C++ object pointer is null
898 addUInt(Variant, dwarf::DW_AT_discr_value, None, CI->getZExtValue());
899 else
900 addSInt(Variant, dwarf::DW_AT_discr_value, None, CI->getSExtValue());
901 }
902 constructMemberDIE(Variant, DDTy);
903 } else {
904 constructMemberDIE(Buffer, DDTy);
905 }
906 } else if (auto *Property
18.1
'Property' is null
36.1
'Property' is null
= dyn_cast<DIObjCProperty>(Element)) {
18
Assuming 'Element' is not a 'DIObjCProperty'
19
Taking false branch
36
Assuming 'Element' is not a 'DIObjCProperty'
37
Taking false branch
907 DIE &ElemDie = createAndAddDIE(Property->getTag(), Buffer);
908 StringRef PropertyName = Property->getName();
909 addString(ElemDie, dwarf::DW_AT_APPLE_property_name, PropertyName);
910 if (Property->getType())
911 addType(ElemDie, Property->getType());
912 addSourceLine(ElemDie, Property);
913 StringRef GetterName = Property->getGetterName();
914 if (!GetterName.empty())
915 addString(ElemDie, dwarf::DW_AT_APPLE_property_getter, GetterName);
916 StringRef SetterName = Property->getSetterName();
917 if (!SetterName.empty())
918 addString(ElemDie, dwarf::DW_AT_APPLE_property_setter, SetterName);
919 if (unsigned PropertyAttributes = Property->getAttributes())
920 addUInt(ElemDie, dwarf::DW_AT_APPLE_property_attribute, None,
921 PropertyAttributes);
922 } else if (auto *Composite
20.1
'Composite' is non-null
38.1
'Composite' is non-null
= dyn_cast<DICompositeType>(Element)) {
20
Assuming 'Element' is a 'DICompositeType'
21
Taking true branch
38
Assuming 'Element' is a 'DICompositeType'
39
Taking true branch
923 if (Composite->getTag() == dwarf::DW_TAG_variant_part) {
22
Assuming the condition is true
23
Taking true branch
40
Assuming the condition is true
41
Taking true branch
924 DIE &VariantPart = createAndAddDIE(Composite->getTag(), Buffer);
925 constructTypeDIE(VariantPart, Composite);
24
Calling 'DwarfUnit::constructTypeDIE'
42
Calling 'DwarfUnit::constructTypeDIE'
926 }
927 }
928 }
929
930 if (CTy->isAppleBlockExtension())
931 addFlag(Buffer, dwarf::DW_AT_APPLE_block);
932
933 if (CTy->getExportSymbols())
934 addFlag(Buffer, dwarf::DW_AT_export_symbols);
935
936 // This is outside the DWARF spec, but GDB expects a DW_AT_containing_type
937 // inside C++ composite types to point to the base class with the vtable.
938 // Rust uses DW_AT_containing_type to link a vtable to the type
939 // for which it was created.
940 if (auto *ContainingType = CTy->getVTableHolder())
941 addDIEEntry(Buffer, dwarf::DW_AT_containing_type,
942 *getOrCreateTypeDIE(ContainingType));
943
944 if (CTy->isObjcClassComplete())
945 addFlag(Buffer, dwarf::DW_AT_APPLE_objc_complete_type);
946
947 // Add the type's non-standard calling convention.
948 uint8_t CC = 0;
949 if (CTy->isTypePassByValue())
950 CC = dwarf::DW_CC_pass_by_value;
951 else if (CTy->isTypePassByReference())
952 CC = dwarf::DW_CC_pass_by_reference;
953 if (CC)
954 addUInt(Buffer, dwarf::DW_AT_calling_convention, dwarf::DW_FORM_data1,
955 CC);
956 break;
957 }
958 default:
959 break;
960 }
961
962 // Add name if not anonymous or intermediate type.
963 if (!Name.empty())
964 addString(Buffer, dwarf::DW_AT_name, Name);
965
966 if (Tag == dwarf::DW_TAG_enumeration_type ||
967 Tag == dwarf::DW_TAG_class_type || Tag == dwarf::DW_TAG_structure_type ||
968 Tag == dwarf::DW_TAG_union_type) {
969 // Add size if non-zero (derived types might be zero-sized.)
970 // Ignore the size if it's a non-enum forward decl.
971 // TODO: Do we care about size for enum forward declarations?
972 if (Size &&
973 (!CTy->isForwardDecl() || Tag == dwarf::DW_TAG_enumeration_type))
974 addUInt(Buffer, dwarf::DW_AT_byte_size, None, Size);
975 else if (!CTy->isForwardDecl())
976 // Add zero size if it is not a forward declaration.
977 addUInt(Buffer, dwarf::DW_AT_byte_size, None, 0);
978
979 // If we're a forward decl, say so.
980 if (CTy->isForwardDecl())
981 addFlag(Buffer, dwarf::DW_AT_declaration);
982
983 // Add source line info if available.
984 if (!CTy->isForwardDecl())
985 addSourceLine(Buffer, CTy);
986
987 // No harm in adding the runtime language to the declaration.
988 unsigned RLang = CTy->getRuntimeLang();
989 if (RLang)
990 addUInt(Buffer, dwarf::DW_AT_APPLE_runtime_class, dwarf::DW_FORM_data1,
991 RLang);
992
993 // Add align info if available.
994 if (uint32_t AlignInBytes = CTy->getAlignInBytes())
995 addUInt(Buffer, dwarf::DW_AT_alignment, dwarf::DW_FORM_udata,
996 AlignInBytes);
997 }
998}
999
1000void DwarfUnit::constructTemplateTypeParameterDIE(
1001 DIE &Buffer, const DITemplateTypeParameter *TP) {
1002 DIE &ParamDIE =
1003 createAndAddDIE(dwarf::DW_TAG_template_type_parameter, Buffer);
1004 // Add the type if it exists, it could be void and therefore no type.
1005 if (TP->getType())
1006 addType(ParamDIE, TP->getType());
1007 if (!TP->getName().empty())
1008 addString(ParamDIE, dwarf::DW_AT_name, TP->getName());
1009 if (TP->isDefault() && (DD->getDwarfVersion() >= 5))
1010 addFlag(ParamDIE, dwarf::DW_AT_default_value);
1011}
1012
1013void DwarfUnit::constructTemplateValueParameterDIE(
1014 DIE &Buffer, const DITemplateValueParameter *VP) {
1015 DIE &ParamDIE = createAndAddDIE(VP->getTag(), Buffer);
1016
1017 // Add the type if there is one, template template and template parameter
1018 // packs will not have a type.
1019 if (VP->getTag() == dwarf::DW_TAG_template_value_parameter)
1020 addType(ParamDIE, VP->getType());
1021 if (!VP->getName().empty())
1022 addString(ParamDIE, dwarf::DW_AT_name, VP->getName());
1023 if (VP->isDefault() && (DD->getDwarfVersion() >= 5))
1024 addFlag(ParamDIE, dwarf::DW_AT_default_value);
1025 if (Metadata *Val = VP->getValue()) {
1026 if (ConstantInt *CI = mdconst::dyn_extract<ConstantInt>(Val))
1027 addConstantValue(ParamDIE, CI, VP->getType());
1028 else if (GlobalValue *GV = mdconst::dyn_extract<GlobalValue>(Val)) {
1029 // We cannot describe the location of dllimport'd entities: the
1030 // computation of their address requires loads from the IAT.
1031 if (!GV->hasDLLImportStorageClass()) {
1032 // For declaration non-type template parameters (such as global values
1033 // and functions)
1034 DIELoc *Loc = new (DIEValueAllocator) DIELoc;
1035 addOpAddress(*Loc, Asm->getSymbol(GV));
1036 // Emit DW_OP_stack_value to use the address as the immediate value of
1037 // the parameter, rather than a pointer to it.
1038 addUInt(*Loc, dwarf::DW_FORM_data1, dwarf::DW_OP_stack_value);
1039 addBlock(ParamDIE, dwarf::DW_AT_location, Loc);
1040 }
1041 } else if (VP->getTag() == dwarf::DW_TAG_GNU_template_template_param) {
1042 assert(isa<MDString>(Val))((isa<MDString>(Val)) ? static_cast<void> (0) : __assert_fail
("isa<MDString>(Val)", "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/llvm/lib/CodeGen/AsmPrinter/DwarfUnit.cpp"
, 1042, __PRETTY_FUNCTION__))
;
1043 addString(ParamDIE, dwarf::DW_AT_GNU_template_name,
1044 cast<MDString>(Val)->getString());
1045 } else if (VP->getTag() == dwarf::DW_TAG_GNU_template_parameter_pack) {
1046 addTemplateParams(ParamDIE, cast<MDTuple>(Val));
1047 }
1048 }
1049}
1050
1051DIE *DwarfUnit::getOrCreateNameSpace(const DINamespace *NS) {
1052 // Construct the context before querying for the existence of the DIE in case
1053 // such construction creates the DIE.
1054 DIE *ContextDIE = getOrCreateContextDIE(NS->getScope());
1055
1056 if (DIE *NDie = getDIE(NS))
1057 return NDie;
1058 DIE &NDie = createAndAddDIE(dwarf::DW_TAG_namespace, *ContextDIE, NS);
1059
1060 StringRef Name = NS->getName();
1061 if (!Name.empty())
1062 addString(NDie, dwarf::DW_AT_name, NS->getName());
1063 else
1064 Name = "(anonymous namespace)";
1065 DD->addAccelNamespace(*CUNode, Name, NDie);
1066 addGlobalName(Name, NDie, NS->getScope());
1067 if (NS->getExportSymbols())
1068 addFlag(NDie, dwarf::DW_AT_export_symbols);
1069 return &NDie;
1070}
1071
1072DIE *DwarfUnit::getOrCreateModule(const DIModule *M) {
1073 // Construct the context before querying for the existence of the DIE in case
1074 // such construction creates the DIE.
1075 DIE *ContextDIE = getOrCreateContextDIE(M->getScope());
1076
1077 if (DIE *MDie = getDIE(M))
1078 return MDie;
1079 DIE &MDie = createAndAddDIE(dwarf::DW_TAG_module, *ContextDIE, M);
1080
1081 if (!M->getName().empty()) {
1082 addString(MDie, dwarf::DW_AT_name, M->getName());
1083 addGlobalName(M->getName(), MDie, M->getScope());
1084 }
1085 if (!M->getConfigurationMacros().empty())
1086 addString(MDie, dwarf::DW_AT_LLVM_config_macros,
1087 M->getConfigurationMacros());
1088 if (!M->getIncludePath().empty())
1089 addString(MDie, dwarf::DW_AT_LLVM_include_path, M->getIncludePath());
1090 if (!M->getAPINotesFile().empty())
1091 addString(MDie, dwarf::DW_AT_LLVM_apinotes, M->getAPINotesFile());
1092 if (M->getFile())
1093 addUInt(MDie, dwarf::DW_AT_decl_file, None,
1094 getOrCreateSourceID(M->getFile()));
1095 if (M->getLineNo())
1096 addUInt(MDie, dwarf::DW_AT_decl_line, None, M->getLineNo());
1097 if (M->getIsDecl())
1098 addFlag(MDie, dwarf::DW_AT_declaration);
1099
1100 return &MDie;
1101}
1102
1103DIE *DwarfUnit::getOrCreateSubprogramDIE(const DISubprogram *SP, bool Minimal) {
1104 // Construct the context before querying for the existence of the DIE in case
1105 // such construction creates the DIE (as is the case for member function
1106 // declarations).
1107 DIE *ContextDIE =
1108 Minimal ? &getUnitDie() : getOrCreateContextDIE(SP->getScope());
1109
1110 if (DIE *SPDie = getDIE(SP))
1111 return SPDie;
1112
1113 if (auto *SPDecl = SP->getDeclaration()) {
1114 if (!Minimal) {
1115 // Add subprogram definitions to the CU die directly.
1116 ContextDIE = &getUnitDie();
1117 // Build the decl now to ensure it precedes the definition.
1118 getOrCreateSubprogramDIE(SPDecl);
1119 }
1120 }
1121
1122 // DW_TAG_inlined_subroutine may refer to this DIE.
1123 DIE &SPDie = createAndAddDIE(dwarf::DW_TAG_subprogram, *ContextDIE, SP);
1124
1125 // Stop here and fill this in later, depending on whether or not this
1126 // subprogram turns out to have inlined instances or not.
1127 if (SP->isDefinition())
1128 return &SPDie;
1129
1130 static_cast<DwarfUnit *>(SPDie.getUnit())
1131 ->applySubprogramAttributes(SP, SPDie);
1132 return &SPDie;
1133}
1134
1135bool DwarfUnit::applySubprogramDefinitionAttributes(const DISubprogram *SP,
1136 DIE &SPDie) {
1137 DIE *DeclDie = nullptr;
1138 StringRef DeclLinkageName;
1139 if (auto *SPDecl = SP->getDeclaration()) {
1140 DITypeRefArray DeclArgs, DefinitionArgs;
1141 DeclArgs = SPDecl->getType()->getTypeArray();
1142 DefinitionArgs = SP->getType()->getTypeArray();
1143
1144 if (DeclArgs.size() && DefinitionArgs.size())
1145 if (DefinitionArgs[0] != NULL__null && DeclArgs[0] != DefinitionArgs[0])
1146 addType(SPDie, DefinitionArgs[0]);
1147
1148 DeclDie = getDIE(SPDecl);
1149 assert(DeclDie && "This DIE should've already been constructed when the "((DeclDie && "This DIE should've already been constructed when the "
"definition DIE was created in " "getOrCreateSubprogramDIE")
? static_cast<void> (0) : __assert_fail ("DeclDie && \"This DIE should've already been constructed when the \" \"definition DIE was created in \" \"getOrCreateSubprogramDIE\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/llvm/lib/CodeGen/AsmPrinter/DwarfUnit.cpp"
, 1151, __PRETTY_FUNCTION__))
1150 "definition DIE was created in "((DeclDie && "This DIE should've already been constructed when the "
"definition DIE was created in " "getOrCreateSubprogramDIE")
? static_cast<void> (0) : __assert_fail ("DeclDie && \"This DIE should've already been constructed when the \" \"definition DIE was created in \" \"getOrCreateSubprogramDIE\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/llvm/lib/CodeGen/AsmPrinter/DwarfUnit.cpp"
, 1151, __PRETTY_FUNCTION__))
1151 "getOrCreateSubprogramDIE")((DeclDie && "This DIE should've already been constructed when the "
"definition DIE was created in " "getOrCreateSubprogramDIE")
? static_cast<void> (0) : __assert_fail ("DeclDie && \"This DIE should've already been constructed when the \" \"definition DIE was created in \" \"getOrCreateSubprogramDIE\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/llvm/lib/CodeGen/AsmPrinter/DwarfUnit.cpp"
, 1151, __PRETTY_FUNCTION__))
;
1152 // Look at the Decl's linkage name only if we emitted it.
1153 if (DD->useAllLinkageNames())
1154 DeclLinkageName = SPDecl->getLinkageName();
1155 unsigned DeclID = getOrCreateSourceID(SPDecl->getFile());
1156 unsigned DefID = getOrCreateSourceID(SP->getFile());
1157 if (DeclID != DefID)
1158 addUInt(SPDie, dwarf::DW_AT_decl_file, None, DefID);
1159
1160 if (SP->getLine() != SPDecl->getLine())
1161 addUInt(SPDie, dwarf::DW_AT_decl_line, None, SP->getLine());
1162 }
1163
1164 // Add function template parameters.
1165 addTemplateParams(SPDie, SP->getTemplateParams());
1166
1167 // Add the linkage name if we have one and it isn't in the Decl.
1168 StringRef LinkageName = SP->getLinkageName();
1169 assert(((LinkageName.empty() || DeclLinkageName.empty()) ||((((LinkageName.empty() || DeclLinkageName.empty()) || LinkageName
== DeclLinkageName) && "decl has a linkage name and it is different"
) ? static_cast<void> (0) : __assert_fail ("((LinkageName.empty() || DeclLinkageName.empty()) || LinkageName == DeclLinkageName) && \"decl has a linkage name and it is different\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/llvm/lib/CodeGen/AsmPrinter/DwarfUnit.cpp"
, 1171, __PRETTY_FUNCTION__))
1170 LinkageName == DeclLinkageName) &&((((LinkageName.empty() || DeclLinkageName.empty()) || LinkageName
== DeclLinkageName) && "decl has a linkage name and it is different"
) ? static_cast<void> (0) : __assert_fail ("((LinkageName.empty() || DeclLinkageName.empty()) || LinkageName == DeclLinkageName) && \"decl has a linkage name and it is different\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/llvm/lib/CodeGen/AsmPrinter/DwarfUnit.cpp"
, 1171, __PRETTY_FUNCTION__))
1171 "decl has a linkage name and it is different")((((LinkageName.empty() || DeclLinkageName.empty()) || LinkageName
== DeclLinkageName) && "decl has a linkage name and it is different"
) ? static_cast<void> (0) : __assert_fail ("((LinkageName.empty() || DeclLinkageName.empty()) || LinkageName == DeclLinkageName) && \"decl has a linkage name and it is different\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/llvm/lib/CodeGen/AsmPrinter/DwarfUnit.cpp"
, 1171, __PRETTY_FUNCTION__))
;
1172 if (DeclLinkageName.empty() &&
1173 // Always emit it for abstract subprograms.
1174 (DD->useAllLinkageNames() || DU->getAbstractSPDies().lookup(SP)))
1175 addLinkageName(SPDie, LinkageName);
1176
1177 if (!DeclDie)
1178 return false;
1179
1180 // Refer to the function declaration where all the other attributes will be
1181 // found.
1182 addDIEEntry(SPDie, dwarf::DW_AT_specification, *DeclDie);
1183 return true;
1184}
1185
1186void DwarfUnit::applySubprogramAttributes(const DISubprogram *SP, DIE &SPDie,
1187 bool SkipSPAttributes) {
1188 // If -fdebug-info-for-profiling is enabled, need to emit the subprogram
1189 // and its source location.
1190 bool SkipSPSourceLocation = SkipSPAttributes &&
1191 !CUNode->getDebugInfoForProfiling();
1192 if (!SkipSPSourceLocation)
1193 if (applySubprogramDefinitionAttributes(SP, SPDie))
1194 return;
1195
1196 // Constructors and operators for anonymous aggregates do not have names.
1197 if (!SP->getName().empty())
1198 addString(SPDie, dwarf::DW_AT_name, SP->getName());
1199
1200 if (!SkipSPSourceLocation)
1201 addSourceLine(SPDie, SP);
1202
1203 // Skip the rest of the attributes under -gmlt to save space.
1204 if (SkipSPAttributes)
1205 return;
1206
1207 // Add the prototype if we have a prototype and we have a C like
1208 // language.
1209 uint16_t Language = getLanguage();
1210 if (SP->isPrototyped() &&
1211 (Language == dwarf::DW_LANG_C89 || Language == dwarf::DW_LANG_C99 ||
1212 Language == dwarf::DW_LANG_ObjC))
1213 addFlag(SPDie, dwarf::DW_AT_prototyped);
1214
1215 if (SP->isObjCDirect())
1216 addFlag(SPDie, dwarf::DW_AT_APPLE_objc_direct);
1217
1218 unsigned CC = 0;
1219 DITypeRefArray Args;
1220 if (const DISubroutineType *SPTy = SP->getType()) {
1221 Args = SPTy->getTypeArray();
1222 CC = SPTy->getCC();
1223 }
1224
1225 // Add a DW_AT_calling_convention if this has an explicit convention.
1226 if (CC && CC != dwarf::DW_CC_normal)
1227 addUInt(SPDie, dwarf::DW_AT_calling_convention, dwarf::DW_FORM_data1, CC);
1228
1229 // Add a return type. If this is a type like a C/C++ void type we don't add a
1230 // return type.
1231 if (Args.size())
1232 if (auto Ty = Args[0])
1233 addType(SPDie, Ty);
1234
1235 unsigned VK = SP->getVirtuality();
1236 if (VK) {
1237 addUInt(SPDie, dwarf::DW_AT_virtuality, dwarf::DW_FORM_data1, VK);
1238 if (SP->getVirtualIndex() != -1u) {
1239 DIELoc *Block = getDIELoc();
1240 addUInt(*Block, dwarf::DW_FORM_data1, dwarf::DW_OP_constu);
1241 addUInt(*Block, dwarf::DW_FORM_udata, SP->getVirtualIndex());
1242 addBlock(SPDie, dwarf::DW_AT_vtable_elem_location, Block);
1243 }
1244 ContainingTypeMap.insert(std::make_pair(&SPDie, SP->getContainingType()));
1245 }
1246
1247 if (!SP->isDefinition()) {
1248 addFlag(SPDie, dwarf::DW_AT_declaration);
1249
1250 // Add arguments. Do not add arguments for subprogram definition. They will
1251 // be handled while processing variables.
1252 constructSubprogramArguments(SPDie, Args);
1253 }
1254
1255 addThrownTypes(SPDie, SP->getThrownTypes());
1256
1257 if (SP->isArtificial())
1258 addFlag(SPDie, dwarf::DW_AT_artificial);
1259
1260 if (!SP->isLocalToUnit())
1261 addFlag(SPDie, dwarf::DW_AT_external);
1262
1263 if (DD->useAppleExtensionAttributes()) {
1264 if (SP->isOptimized())
1265 addFlag(SPDie, dwarf::DW_AT_APPLE_optimized);
1266
1267 if (unsigned isa = Asm->getISAEncoding())
1268 addUInt(SPDie, dwarf::DW_AT_APPLE_isa, dwarf::DW_FORM_flag, isa);
1269 }
1270
1271 if (SP->isLValueReference())
1272 addFlag(SPDie, dwarf::DW_AT_reference);
1273
1274 if (SP->isRValueReference())
1275 addFlag(SPDie, dwarf::DW_AT_rvalue_reference);
1276
1277 if (SP->isNoReturn())
1278 addFlag(SPDie, dwarf::DW_AT_noreturn);
1279
1280 if (SP->isProtected())
1281 addUInt(SPDie, dwarf::DW_AT_accessibility, dwarf::DW_FORM_data1,
1282 dwarf::DW_ACCESS_protected);
1283 else if (SP->isPrivate())
1284 addUInt(SPDie, dwarf::DW_AT_accessibility, dwarf::DW_FORM_data1,
1285 dwarf::DW_ACCESS_private);
1286 else if (SP->isPublic())
1287 addUInt(SPDie, dwarf::DW_AT_accessibility, dwarf::DW_FORM_data1,
1288 dwarf::DW_ACCESS_public);
1289
1290 if (SP->isExplicit())
1291 addFlag(SPDie, dwarf::DW_AT_explicit);
1292
1293 if (SP->isMainSubprogram())
1294 addFlag(SPDie, dwarf::DW_AT_main_subprogram);
1295 if (SP->isPure())
1296 addFlag(SPDie, dwarf::DW_AT_pure);
1297 if (SP->isElemental())
1298 addFlag(SPDie, dwarf::DW_AT_elemental);
1299 if (SP->isRecursive())
1300 addFlag(SPDie, dwarf::DW_AT_recursive);
1301
1302 if (DD->getDwarfVersion() >= 5 && SP->isDeleted())
1303 addFlag(SPDie, dwarf::DW_AT_deleted);
1304}
1305
1306void DwarfUnit::constructSubrangeDIE(DIE &Buffer, const DISubrange *SR,
1307 DIE *IndexTy) {
1308 DIE &DW_Subrange = createAndAddDIE(dwarf::DW_TAG_subrange_type, Buffer);
1309 addDIEEntry(DW_Subrange, dwarf::DW_AT_type, *IndexTy);
1310
1311 // The LowerBound value defines the lower bounds which is typically zero for
1312 // C/C++. The Count value is the number of elements. Values are 64 bit. If
1313 // Count == -1 then the array is unbounded and we do not emit
1314 // DW_AT_lower_bound and DW_AT_count attributes.
1315 int64_t DefaultLowerBound = getDefaultLowerBound();
1316
1317 auto AddBoundTypeEntry = [&](dwarf::Attribute Attr,
1318 DISubrange::BoundType Bound) -> void {
1319 if (auto *BV = Bound.dyn_cast<DIVariable *>()) {
1320 if (auto *VarDIE = getDIE(BV))
1321 addDIEEntry(DW_Subrange, Attr, *VarDIE);
1322 } else if (auto *BE = Bound.dyn_cast<DIExpression *>()) {
1323 DIELoc *Loc = new (DIEValueAllocator) DIELoc;
1324 DIEDwarfExpression DwarfExpr(*Asm, getCU(), *Loc);
1325 DwarfExpr.setMemoryLocationKind();
1326 DwarfExpr.addExpression(BE);
1327 addBlock(DW_Subrange, Attr, DwarfExpr.finalize());
1328 } else if (auto *BI = Bound.dyn_cast<ConstantInt *>()) {
1329 if (Attr == dwarf::DW_AT_count) {
1330 if (BI->getSExtValue() != -1)
1331 addUInt(DW_Subrange, Attr, None, BI->getSExtValue());
1332 } else if (Attr != dwarf::DW_AT_lower_bound || DefaultLowerBound == -1 ||
1333 BI->getSExtValue() != DefaultLowerBound)
1334 addSInt(DW_Subrange, Attr, dwarf::DW_FORM_sdata, BI->getSExtValue());
1335 }
1336 };
1337
1338 AddBoundTypeEntry(dwarf::DW_AT_lower_bound, SR->getLowerBound());
1339
1340 AddBoundTypeEntry(dwarf::DW_AT_count, SR->getCount());
1341
1342 AddBoundTypeEntry(dwarf::DW_AT_upper_bound, SR->getUpperBound());
1343
1344 AddBoundTypeEntry(dwarf::DW_AT_byte_stride, SR->getStride());
1345}
1346
1347void DwarfUnit::constructGenericSubrangeDIE(DIE &Buffer,
1348 const DIGenericSubrange *GSR,
1349 DIE *IndexTy) {
1350 DIE &DwGenericSubrange =
1351 createAndAddDIE(dwarf::DW_TAG_generic_subrange, Buffer);
1352 addDIEEntry(DwGenericSubrange, dwarf::DW_AT_type, *IndexTy);
1353
1354 int64_t DefaultLowerBound = getDefaultLowerBound();
1355
1356 auto AddBoundTypeEntry = [&](dwarf::Attribute Attr,
1357 DIGenericSubrange::BoundType Bound) -> void {
1358 if (auto *BV = Bound.dyn_cast<DIVariable *>()) {
1359 if (auto *VarDIE = getDIE(BV))
1360 addDIEEntry(DwGenericSubrange, Attr, *VarDIE);
1361 } else if (auto *BE = Bound.dyn_cast<DIExpression *>()) {
1362 if (BE->isConstant() &&
1363 DIExpression::SignedOrUnsignedConstant::SignedConstant ==
1364 *BE->isConstant()) {
1365 if (Attr != dwarf::DW_AT_lower_bound || DefaultLowerBound == -1 ||
1366 static_cast<int64_t>(BE->getElement(1)) != DefaultLowerBound)
1367 addSInt(DwGenericSubrange, Attr, dwarf::DW_FORM_sdata,
1368 BE->getElement(1));
1369 } else {
1370 DIELoc *Loc = new (DIEValueAllocator) DIELoc;
1371 DIEDwarfExpression DwarfExpr(*Asm, getCU(), *Loc);
1372 DwarfExpr.setMemoryLocationKind();
1373 DwarfExpr.addExpression(BE);
1374 addBlock(DwGenericSubrange, Attr, DwarfExpr.finalize());
1375 }
1376 }
1377 };
1378
1379 AddBoundTypeEntry(dwarf::DW_AT_lower_bound, GSR->getLowerBound());
1380 AddBoundTypeEntry(dwarf::DW_AT_count, GSR->getCount());
1381 AddBoundTypeEntry(dwarf::DW_AT_upper_bound, GSR->getUpperBound());
1382 AddBoundTypeEntry(dwarf::DW_AT_byte_stride, GSR->getStride());
1383}
1384
1385DIE *DwarfUnit::getIndexTyDie() {
1386 if (IndexTyDie)
1387 return IndexTyDie;
1388 // Construct an integer type to use for indexes.
1389 IndexTyDie = &createAndAddDIE(dwarf::DW_TAG_base_type, getUnitDie());
1390 StringRef Name = "__ARRAY_SIZE_TYPE__";
1391 addString(*IndexTyDie, dwarf::DW_AT_name, Name);
1392 addUInt(*IndexTyDie, dwarf::DW_AT_byte_size, None, sizeof(int64_t));
1393 addUInt(*IndexTyDie, dwarf::DW_AT_encoding, dwarf::DW_FORM_data1,
1394 dwarf::DW_ATE_unsigned);
1395 DD->addAccelType(*CUNode, Name, *IndexTyDie, /*Flags*/ 0);
1396 return IndexTyDie;
1397}
1398
1399/// Returns true if the vector's size differs from the sum of sizes of elements
1400/// the user specified. This can occur if the vector has been rounded up to
1401/// fit memory alignment constraints.
1402static bool hasVectorBeenPadded(const DICompositeType *CTy) {
1403 assert(CTy && CTy->isVector() && "Composite type is not a vector")((CTy && CTy->isVector() && "Composite type is not a vector"
) ? static_cast<void> (0) : __assert_fail ("CTy && CTy->isVector() && \"Composite type is not a vector\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/llvm/lib/CodeGen/AsmPrinter/DwarfUnit.cpp"
, 1403, __PRETTY_FUNCTION__))
;
1404 const uint64_t ActualSize = CTy->getSizeInBits();
1405
1406 // Obtain the size of each element in the vector.
1407 DIType *BaseTy = CTy->getBaseType();
1408 assert(BaseTy && "Unknown vector element type.")((BaseTy && "Unknown vector element type.") ? static_cast
<void> (0) : __assert_fail ("BaseTy && \"Unknown vector element type.\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/llvm/lib/CodeGen/AsmPrinter/DwarfUnit.cpp"
, 1408, __PRETTY_FUNCTION__))
;
1409 const uint64_t ElementSize = BaseTy->getSizeInBits();
1410
1411 // Locate the number of elements in the vector.
1412 const DINodeArray Elements = CTy->getElements();
1413 assert(Elements.size() == 1 &&((Elements.size() == 1 && Elements[0]->getTag() ==
dwarf::DW_TAG_subrange_type && "Invalid vector element array, expected one element of type subrange"
) ? static_cast<void> (0) : __assert_fail ("Elements.size() == 1 && Elements[0]->getTag() == dwarf::DW_TAG_subrange_type && \"Invalid vector element array, expected one element of type subrange\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/llvm/lib/CodeGen/AsmPrinter/DwarfUnit.cpp"
, 1415, __PRETTY_FUNCTION__))
1414 Elements[0]->getTag() == dwarf::DW_TAG_subrange_type &&((Elements.size() == 1 && Elements[0]->getTag() ==
dwarf::DW_TAG_subrange_type && "Invalid vector element array, expected one element of type subrange"
) ? static_cast<void> (0) : __assert_fail ("Elements.size() == 1 && Elements[0]->getTag() == dwarf::DW_TAG_subrange_type && \"Invalid vector element array, expected one element of type subrange\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/llvm/lib/CodeGen/AsmPrinter/DwarfUnit.cpp"
, 1415, __PRETTY_FUNCTION__))
1415 "Invalid vector element array, expected one element of type subrange")((Elements.size() == 1 && Elements[0]->getTag() ==
dwarf::DW_TAG_subrange_type && "Invalid vector element array, expected one element of type subrange"
) ? static_cast<void> (0) : __assert_fail ("Elements.size() == 1 && Elements[0]->getTag() == dwarf::DW_TAG_subrange_type && \"Invalid vector element array, expected one element of type subrange\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/llvm/lib/CodeGen/AsmPrinter/DwarfUnit.cpp"
, 1415, __PRETTY_FUNCTION__))
;
1416 const auto Subrange = cast<DISubrange>(Elements[0]);
1417 const auto NumVecElements =
1418 Subrange->getCount()
1419 ? Subrange->getCount().get<ConstantInt *>()->getSExtValue()
1420 : 0;
1421
1422 // Ensure we found the element count and that the actual size is wide
1423 // enough to contain the requested size.
1424 assert(ActualSize >= (NumVecElements * ElementSize) && "Invalid vector size")((ActualSize >= (NumVecElements * ElementSize) && "Invalid vector size"
) ? static_cast<void> (0) : __assert_fail ("ActualSize >= (NumVecElements * ElementSize) && \"Invalid vector size\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/llvm/lib/CodeGen/AsmPrinter/DwarfUnit.cpp"
, 1424, __PRETTY_FUNCTION__))
;
1425 return ActualSize != (NumVecElements * ElementSize);
1426}
1427
1428void DwarfUnit::constructArrayTypeDIE(DIE &Buffer, const DICompositeType *CTy) {
1429 if (CTy->isVector()) {
1430 addFlag(Buffer, dwarf::DW_AT_GNU_vector);
1431 if (hasVectorBeenPadded(CTy))
1432 addUInt(Buffer, dwarf::DW_AT_byte_size, None,
1433 CTy->getSizeInBits() / CHAR_BIT8);
1434 }
1435
1436 if (DIVariable *Var = CTy->getDataLocation()) {
1437 if (auto *VarDIE = getDIE(Var))
1438 addDIEEntry(Buffer, dwarf::DW_AT_data_location, *VarDIE);
1439 } else if (DIExpression *Expr = CTy->getDataLocationExp()) {
1440 DIELoc *Loc = new (DIEValueAllocator) DIELoc;
1441 DIEDwarfExpression DwarfExpr(*Asm, getCU(), *Loc);
1442 DwarfExpr.setMemoryLocationKind();
1443 DwarfExpr.addExpression(Expr);
1444 addBlock(Buffer, dwarf::DW_AT_data_location, DwarfExpr.finalize());
1445 }
1446
1447 if (DIVariable *Var = CTy->getAssociated()) {
1448 if (auto *VarDIE = getDIE(Var))
1449 addDIEEntry(Buffer, dwarf::DW_AT_associated, *VarDIE);
1450 } else if (DIExpression *Expr = CTy->getAssociatedExp()) {
1451 DIELoc *Loc = new (DIEValueAllocator) DIELoc;
1452 DIEDwarfExpression DwarfExpr(*Asm, getCU(), *Loc);
1453 DwarfExpr.setMemoryLocationKind();
1454 DwarfExpr.addExpression(Expr);
1455 addBlock(Buffer, dwarf::DW_AT_associated, DwarfExpr.finalize());
1456 }
1457
1458 if (DIVariable *Var = CTy->getAllocated()) {
1459 if (auto *VarDIE = getDIE(Var))
1460 addDIEEntry(Buffer, dwarf::DW_AT_allocated, *VarDIE);
1461 } else if (DIExpression *Expr = CTy->getAllocatedExp()) {
1462 DIELoc *Loc = new (DIEValueAllocator) DIELoc;
1463 DIEDwarfExpression DwarfExpr(*Asm, getCU(), *Loc);
1464 DwarfExpr.setMemoryLocationKind();
1465 DwarfExpr.addExpression(Expr);
1466 addBlock(Buffer, dwarf::DW_AT_allocated, DwarfExpr.finalize());
1467 }
1468
1469 if (auto *RankConst = CTy->getRankConst()) {
1470 addSInt(Buffer, dwarf::DW_AT_rank, dwarf::DW_FORM_sdata,
1471 RankConst->getSExtValue());
1472 } else if (auto *RankExpr = CTy->getRankExp()) {
1473 DIELoc *Loc = new (DIEValueAllocator) DIELoc;
1474 DIEDwarfExpression DwarfExpr(*Asm, getCU(), *Loc);
1475 DwarfExpr.setMemoryLocationKind();
1476 DwarfExpr.addExpression(RankExpr);
1477 addBlock(Buffer, dwarf::DW_AT_rank, DwarfExpr.finalize());
1478 }
1479
1480 // Emit the element type.
1481 addType(Buffer, CTy->getBaseType());
1482
1483 // Get an anonymous type for index type.
1484 // FIXME: This type should be passed down from the front end
1485 // as different languages may have different sizes for indexes.
1486 DIE *IdxTy = getIndexTyDie();
1487
1488 // Add subranges to array type.
1489 DINodeArray Elements = CTy->getElements();
1490 for (DINode *E : Elements) {
1491 // FIXME: Should this really be such a loose cast?
1492 if (auto *Element = dyn_cast_or_null<DINode>(E)) {
1493 if (Element->getTag() == dwarf::DW_TAG_subrange_type)
1494 constructSubrangeDIE(Buffer, cast<DISubrange>(Element), IdxTy);
1495 else if (Element->getTag() == dwarf::DW_TAG_generic_subrange)
1496 constructGenericSubrangeDIE(Buffer, cast<DIGenericSubrange>(Element),
1497 IdxTy);
1498 }
1499 }
1500}
1501
1502void DwarfUnit::constructEnumTypeDIE(DIE &Buffer, const DICompositeType *CTy) {
1503 const DIType *DTy = CTy->getBaseType();
1504 bool IsUnsigned = DTy && DD->isUnsignedDIType(DTy);
1505 if (DTy) {
1506 if (DD->getDwarfVersion() >= 3)
1507 addType(Buffer, DTy);
1508 if (DD->getDwarfVersion() >= 4 && (CTy->getFlags() & DINode::FlagEnumClass))
1509 addFlag(Buffer, dwarf::DW_AT_enum_class);
1510 }
1511
1512 auto *Context = CTy->getScope();
1513 bool IndexEnumerators = !Context || isa<DICompileUnit>(Context) || isa<DIFile>(Context) ||
1514 isa<DINamespace>(Context) || isa<DICommonBlock>(Context);
1515 DINodeArray Elements = CTy->getElements();
1516
1517 // Add enumerators to enumeration type.
1518 for (const DINode *E : Elements) {
1519 auto *Enum = dyn_cast_or_null<DIEnumerator>(E);
1520 if (Enum) {
1521 DIE &Enumerator = createAndAddDIE(dwarf::DW_TAG_enumerator, Buffer);
1522 StringRef Name = Enum->getName();
1523 addString(Enumerator, dwarf::DW_AT_name, Name);
1524 addConstantValue(Enumerator, Enum->getValue(), IsUnsigned);
1525 if (IndexEnumerators)
1526 addGlobalName(Name, Enumerator, Context);
1527 }
1528 }
1529}
1530
1531void DwarfUnit::constructContainingTypeDIEs() {
1532 for (auto &P : ContainingTypeMap) {
1533 DIE &SPDie = *P.first;
1534 const DINode *D = P.second;
1535 if (!D)
1536 continue;
1537 DIE *NDie = getDIE(D);
1538 if (!NDie)
1539 continue;
1540 addDIEEntry(SPDie, dwarf::DW_AT_containing_type, *NDie);
1541 }
1542}
1543
1544DIE &DwarfUnit::constructMemberDIE(DIE &Buffer, const DIDerivedType *DT) {
1545 DIE &MemberDie = createAndAddDIE(DT->getTag(), Buffer);
1546 StringRef Name = DT->getName();
1547 if (!Name.empty())
1548 addString(MemberDie, dwarf::DW_AT_name, Name);
1549
1550 if (DIType *Resolved = DT->getBaseType())
1551 addType(MemberDie, Resolved);
1552
1553 addSourceLine(MemberDie, DT);
1554
1555 if (DT->getTag() == dwarf::DW_TAG_inheritance && DT->isVirtual()) {
1556
1557 // For C++, virtual base classes are not at fixed offset. Use following
1558 // expression to extract appropriate offset from vtable.
1559 // BaseAddr = ObAddr + *((*ObAddr) - Offset)
1560
1561 DIELoc *VBaseLocationDie = new (DIEValueAllocator) DIELoc;
1562 addUInt(*VBaseLocationDie, dwarf::DW_FORM_data1, dwarf::DW_OP_dup);
1563 addUInt(*VBaseLocationDie, dwarf::DW_FORM_data1, dwarf::DW_OP_deref);
1564 addUInt(*VBaseLocationDie, dwarf::DW_FORM_data1, dwarf::DW_OP_constu);
1565 addUInt(*VBaseLocationDie, dwarf::DW_FORM_udata, DT->getOffsetInBits());
1566 addUInt(*VBaseLocationDie, dwarf::DW_FORM_data1, dwarf::DW_OP_minus);
1567 addUInt(*VBaseLocationDie, dwarf::DW_FORM_data1, dwarf::DW_OP_deref);
1568 addUInt(*VBaseLocationDie, dwarf::DW_FORM_data1, dwarf::DW_OP_plus);
1569
1570 addBlock(MemberDie, dwarf::DW_AT_data_member_location, VBaseLocationDie);
1571 } else {
1572 uint64_t Size = DT->getSizeInBits();
1573 uint64_t FieldSize = DD->getBaseTypeSize(DT);
1574 uint32_t AlignInBytes = DT->getAlignInBytes();
1575 uint64_t OffsetInBytes;
1576
1577 bool IsBitfield = FieldSize && Size != FieldSize;
1578 if (IsBitfield) {
1579 // Handle bitfield, assume bytes are 8 bits.
1580 if (DD->useDWARF2Bitfields())
1581 addUInt(MemberDie, dwarf::DW_AT_byte_size, None, FieldSize/8);
1582 addUInt(MemberDie, dwarf::DW_AT_bit_size, None, Size);
1583
1584 uint64_t Offset = DT->getOffsetInBits();
1585 // We can't use DT->getAlignInBits() here: AlignInBits for member type
1586 // is non-zero if and only if alignment was forced (e.g. _Alignas()),
1587 // which can't be done with bitfields. Thus we use FieldSize here.
1588 uint32_t AlignInBits = FieldSize;
1589 uint32_t AlignMask = ~(AlignInBits - 1);
1590 // The bits from the start of the storage unit to the start of the field.
1591 uint64_t StartBitOffset = Offset - (Offset & AlignMask);
1592 // The byte offset of the field's aligned storage unit inside the struct.
1593 OffsetInBytes = (Offset - StartBitOffset) / 8;
1594
1595 if (DD->useDWARF2Bitfields()) {
1596 uint64_t HiMark = (Offset + FieldSize) & AlignMask;
1597 uint64_t FieldOffset = (HiMark - FieldSize);
1598 Offset -= FieldOffset;
1599
1600 // Maybe we need to work from the other end.
1601 if (Asm->getDataLayout().isLittleEndian())
1602 Offset = FieldSize - (Offset + Size);
1603
1604 addUInt(MemberDie, dwarf::DW_AT_bit_offset, None, Offset);
1605 OffsetInBytes = FieldOffset >> 3;
1606 } else {
1607 addUInt(MemberDie, dwarf::DW_AT_data_bit_offset, None, Offset);
1608 }
1609 } else {
1610 // This is not a bitfield.
1611 OffsetInBytes = DT->getOffsetInBits() / 8;
1612 if (AlignInBytes)
1613 addUInt(MemberDie, dwarf::DW_AT_alignment, dwarf::DW_FORM_udata,
1614 AlignInBytes);
1615 }
1616
1617 if (DD->getDwarfVersion() <= 2) {
1618 DIELoc *MemLocationDie = new (DIEValueAllocator) DIELoc;
1619 addUInt(*MemLocationDie, dwarf::DW_FORM_data1, dwarf::DW_OP_plus_uconst);
1620 addUInt(*MemLocationDie, dwarf::DW_FORM_udata, OffsetInBytes);
1621 addBlock(MemberDie, dwarf::DW_AT_data_member_location, MemLocationDie);
1622 } else if (!IsBitfield || DD->useDWARF2Bitfields())
1623 addUInt(MemberDie, dwarf::DW_AT_data_member_location, None,
1624 OffsetInBytes);
1625 }
1626
1627 if (DT->isProtected())
1628 addUInt(MemberDie, dwarf::DW_AT_accessibility, dwarf::DW_FORM_data1,
1629 dwarf::DW_ACCESS_protected);
1630 else if (DT->isPrivate())
1631 addUInt(MemberDie, dwarf::DW_AT_accessibility, dwarf::DW_FORM_data1,
1632 dwarf::DW_ACCESS_private);
1633 // Otherwise C++ member and base classes are considered public.
1634 else if (DT->isPublic())
1635 addUInt(MemberDie, dwarf::DW_AT_accessibility, dwarf::DW_FORM_data1,
1636 dwarf::DW_ACCESS_public);
1637 if (DT->isVirtual())
1638 addUInt(MemberDie, dwarf::DW_AT_virtuality, dwarf::DW_FORM_data1,
1639 dwarf::DW_VIRTUALITY_virtual);
1640
1641 // Objective-C properties.
1642 if (DINode *PNode = DT->getObjCProperty())
1643 if (DIE *PDie = getDIE(PNode))
1644 MemberDie.addValue(DIEValueAllocator, dwarf::DW_AT_APPLE_property,
1645 dwarf::DW_FORM_ref4, DIEEntry(*PDie));
1646
1647 if (DT->isArtificial())
1648 addFlag(MemberDie, dwarf::DW_AT_artificial);
1649
1650 return MemberDie;
1651}
1652
1653DIE *DwarfUnit::getOrCreateStaticMemberDIE(const DIDerivedType *DT) {
1654 if (!DT)
1655 return nullptr;
1656
1657 // Construct the context before querying for the existence of the DIE in case
1658 // such construction creates the DIE.
1659 DIE *ContextDIE = getOrCreateContextDIE(DT->getScope());
1660 assert(dwarf::isType(ContextDIE->getTag()) &&((dwarf::isType(ContextDIE->getTag()) && "Static member should belong to a type."
) ? static_cast<void> (0) : __assert_fail ("dwarf::isType(ContextDIE->getTag()) && \"Static member should belong to a type.\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/llvm/lib/CodeGen/AsmPrinter/DwarfUnit.cpp"
, 1661, __PRETTY_FUNCTION__))
1661 "Static member should belong to a type.")((dwarf::isType(ContextDIE->getTag()) && "Static member should belong to a type."
) ? static_cast<void> (0) : __assert_fail ("dwarf::isType(ContextDIE->getTag()) && \"Static member should belong to a type.\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/llvm/lib/CodeGen/AsmPrinter/DwarfUnit.cpp"
, 1661, __PRETTY_FUNCTION__))
;
1662
1663 if (DIE *StaticMemberDIE = getDIE(DT))
1664 return StaticMemberDIE;
1665
1666 DIE &StaticMemberDIE = createAndAddDIE(DT->getTag(), *ContextDIE, DT);
1667
1668 const DIType *Ty = DT->getBaseType();
1669
1670 addString(StaticMemberDIE, dwarf::DW_AT_name, DT->getName());
1671 addType(StaticMemberDIE, Ty);
1672 addSourceLine(StaticMemberDIE, DT);
1673 addFlag(StaticMemberDIE, dwarf::DW_AT_external);
1674 addFlag(StaticMemberDIE, dwarf::DW_AT_declaration);
1675
1676 // FIXME: We could omit private if the parent is a class_type, and
1677 // public if the parent is something else.
1678 if (DT->isProtected())
1679 addUInt(StaticMemberDIE, dwarf::DW_AT_accessibility, dwarf::DW_FORM_data1,
1680 dwarf::DW_ACCESS_protected);
1681 else if (DT->isPrivate())
1682 addUInt(StaticMemberDIE, dwarf::DW_AT_accessibility, dwarf::DW_FORM_data1,
1683 dwarf::DW_ACCESS_private);
1684 else if (DT->isPublic())
1685 addUInt(StaticMemberDIE, dwarf::DW_AT_accessibility, dwarf::DW_FORM_data1,
1686 dwarf::DW_ACCESS_public);
1687
1688 if (const ConstantInt *CI = dyn_cast_or_null<ConstantInt>(DT->getConstant()))
1689 addConstantValue(StaticMemberDIE, CI, Ty);
1690 if (const ConstantFP *CFP = dyn_cast_or_null<ConstantFP>(DT->getConstant()))
1691 addConstantFPValue(StaticMemberDIE, CFP);
1692
1693 if (uint32_t AlignInBytes = DT->getAlignInBytes())
1694 addUInt(StaticMemberDIE, dwarf::DW_AT_alignment, dwarf::DW_FORM_udata,
1695 AlignInBytes);
1696
1697 return &StaticMemberDIE;
1698}
1699
1700void DwarfUnit::emitCommonHeader(bool UseOffsets, dwarf::UnitType UT) {
1701 // Emit size of content not including length itself
1702 if (!DD->useSectionsAsReferences())
1703 EndLabel = Asm->emitDwarfUnitLength(
1704 isDwoUnit() ? "debug_info_dwo" : "debug_info", "Length of Unit");
1705 else
1706 Asm->emitDwarfUnitLength(getHeaderSize() + getUnitDie().getSize(),
1707 "Length of Unit");
1708
1709 Asm->OutStreamer->AddComment("DWARF version number");
1710 unsigned Version = DD->getDwarfVersion();
1711 Asm->emitInt16(Version);
1712
1713 // DWARF v5 reorders the address size and adds a unit type.
1714 if (Version >= 5) {
1715 Asm->OutStreamer->AddComment("DWARF Unit Type");
1716 Asm->emitInt8(UT);
1717 Asm->OutStreamer->AddComment("Address Size (in bytes)");
1718 Asm->emitInt8(Asm->MAI->getCodePointerSize());
1719 }
1720
1721 // We share one abbreviations table across all units so it's always at the
1722 // start of the section. Use a relocatable offset where needed to ensure
1723 // linking doesn't invalidate that offset.
1724 Asm->OutStreamer->AddComment("Offset Into Abbrev. Section");
1725 const TargetLoweringObjectFile &TLOF = Asm->getObjFileLowering();
1726 if (UseOffsets)
1727 Asm->emitDwarfLengthOrOffset(0);
1728 else
1729 Asm->emitDwarfSymbolReference(
1730 TLOF.getDwarfAbbrevSection()->getBeginSymbol(), false);
1731
1732 if (Version <= 4) {
1733 Asm->OutStreamer->AddComment("Address Size (in bytes)");
1734 Asm->emitInt8(Asm->MAI->getCodePointerSize());
1735 }
1736}
1737
1738void DwarfTypeUnit::emitHeader(bool UseOffsets) {
1739 DwarfUnit::emitCommonHeader(UseOffsets,
1740 DD->useSplitDwarf() ? dwarf::DW_UT_split_type
1741 : dwarf::DW_UT_type);
1742 Asm->OutStreamer->AddComment("Type Signature");
1743 Asm->OutStreamer->emitIntValue(TypeSignature, sizeof(TypeSignature));
1744 Asm->OutStreamer->AddComment("Type DIE Offset");
1745 // In a skeleton type unit there is no type DIE so emit a zero offset.
1746 Asm->emitDwarfLengthOrOffset(Ty ? Ty->getOffset() : 0);
1747}
1748
1749DIE::value_iterator
1750DwarfUnit::addSectionDelta(DIE &Die, dwarf::Attribute Attribute,
1751 const MCSymbol *Hi, const MCSymbol *Lo) {
1752 return Die.addValue(DIEValueAllocator, Attribute,
1753 DD->getDwarfSectionOffsetForm(),
1754 new (DIEValueAllocator) DIEDelta(Hi, Lo));
1755}
1756
1757DIE::value_iterator
1758DwarfUnit::addSectionLabel(DIE &Die, dwarf::Attribute Attribute,
1759 const MCSymbol *Label, const MCSymbol *Sec) {
1760 if (Asm->MAI->doesDwarfUseRelocationsAcrossSections())
1761 return addLabel(Die, Attribute, DD->getDwarfSectionOffsetForm(), Label);
1762 return addSectionDelta(Die, Attribute, Label, Sec);
1763}
1764
1765bool DwarfTypeUnit::isDwoUnit() const {
1766 // Since there are no skeleton type units, all type units are dwo type units
1767 // when split DWARF is being used.
1768 return DD->useSplitDwarf();
1769}
1770
1771void DwarfTypeUnit::addGlobalName(StringRef Name, const DIE &Die,
1772 const DIScope *Context) {
1773 getCU().addGlobalNameForTypeUnit(Name, Context);
1774}
1775
1776void DwarfTypeUnit::addGlobalType(const DIType *Ty, const DIE &Die,
1777 const DIScope *Context) {
1778 getCU().addGlobalTypeUnitType(Ty, Context);
1779}
1780
1781const MCSymbol *DwarfUnit::getCrossSectionRelativeBaseAddress() const {
1782 if (!Asm->MAI->doesDwarfUseRelocationsAcrossSections())
1783 return nullptr;
1784 if (isDwoUnit())
1785 return nullptr;
1786 return getSection()->getBeginSymbol();
1787}
1788
1789void DwarfUnit::addStringOffsetsStart() {
1790 const TargetLoweringObjectFile &TLOF = Asm->getObjFileLowering();
1791 addSectionLabel(getUnitDie(), dwarf::DW_AT_str_offsets_base,
1792 DU->getStringOffsetsStartSym(),
1793 TLOF.getDwarfStrOffSection()->getBeginSymbol());
1794}
1795
1796void DwarfUnit::addRnglistsBase() {
1797 assert(DD->getDwarfVersion() >= 5 &&((DD->getDwarfVersion() >= 5 && "DW_AT_rnglists_base requires DWARF version 5 or later"
) ? static_cast<void> (0) : __assert_fail ("DD->getDwarfVersion() >= 5 && \"DW_AT_rnglists_base requires DWARF version 5 or later\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/llvm/lib/CodeGen/AsmPrinter/DwarfUnit.cpp"
, 1798, __PRETTY_FUNCTION__))
1798 "DW_AT_rnglists_base requires DWARF version 5 or later")((DD->getDwarfVersion() >= 5 && "DW_AT_rnglists_base requires DWARF version 5 or later"
) ? static_cast<void> (0) : __assert_fail ("DD->getDwarfVersion() >= 5 && \"DW_AT_rnglists_base requires DWARF version 5 or later\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/llvm/lib/CodeGen/AsmPrinter/DwarfUnit.cpp"
, 1798, __PRETTY_FUNCTION__))
;
1799 const TargetLoweringObjectFile &TLOF = Asm->getObjFileLowering();
1800 addSectionLabel(getUnitDie(), dwarf::DW_AT_rnglists_base,
1801 DU->getRnglistsTableBaseSym(),
1802 TLOF.getDwarfRnglistsSection()->getBeginSymbol());
1803}
1804
1805void DwarfTypeUnit::finishNonUnitTypeDIE(DIE& D, const DICompositeType *CTy) {
1806 addFlag(D, dwarf::DW_AT_declaration);
1807 StringRef Name = CTy->getName();
1808 if (!Name.empty())
1
Assuming the condition is false
2
Taking false branch
1809 addString(D, dwarf::DW_AT_name, Name);
1810 getCU().createTypeDIE(CTy);
3
Calling 'DwarfUnit::createTypeDIE'
1811}