Bug Summary

File:lib/MC/MCParser/DarwinAsmParser.cpp
Warning:line 1134, column 3
2nd function call argument is an uninitialized value

Annotated Source Code

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clang -cc1 -triple x86_64-pc-linux-gnu -analyze -disable-free -disable-llvm-verifier -discard-value-names -main-file-name DarwinAsmParser.cpp -analyzer-store=region -analyzer-opt-analyze-nested-blocks -analyzer-eagerly-assume -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 -mrelocation-model pic -pic-level 2 -mthread-model posix -fmath-errno -masm-verbose -mconstructor-aliases -munwind-tables -fuse-init-array -target-cpu x86-64 -dwarf-column-info -debugger-tuning=gdb -momit-leaf-frame-pointer -ffunction-sections -fdata-sections -resource-dir /usr/lib/llvm-7/lib/clang/7.0.0 -D _DEBUG -D _GNU_SOURCE -D __STDC_CONSTANT_MACROS -D __STDC_FORMAT_MACROS -D __STDC_LIMIT_MACROS -I /build/llvm-toolchain-snapshot-7~svn329677/build-llvm/lib/MC/MCParser -I /build/llvm-toolchain-snapshot-7~svn329677/lib/MC/MCParser -I /build/llvm-toolchain-snapshot-7~svn329677/build-llvm/include -I /build/llvm-toolchain-snapshot-7~svn329677/include -U NDEBUG -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/7.3.0/../../../../include/c++/7.3.0 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/7.3.0/../../../../include/x86_64-linux-gnu/c++/7.3.0 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/7.3.0/../../../../include/x86_64-linux-gnu/c++/7.3.0 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/7.3.0/../../../../include/c++/7.3.0/backward -internal-isystem /usr/include/clang/7.0.0/include/ -internal-isystem /usr/local/include -internal-isystem /usr/lib/llvm-7/lib/clang/7.0.0/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++11 -fdeprecated-macro -fdebug-compilation-dir /build/llvm-toolchain-snapshot-7~svn329677/build-llvm/lib/MC/MCParser -ferror-limit 19 -fmessage-length 0 -fvisibility-inlines-hidden -fobjc-runtime=gcc -fdiagnostics-show-option -vectorize-loops -vectorize-slp -analyzer-checker optin.performance.Padding -analyzer-output=html -analyzer-config stable-report-filename=true -o /tmp/scan-build-2018-04-11-031539-24776-1 -x c++ /build/llvm-toolchain-snapshot-7~svn329677/lib/MC/MCParser/DarwinAsmParser.cpp
1//===- DarwinAsmParser.cpp - Darwin (Mach-O) Assembly Parser --------------===//
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#include "llvm/ADT/STLExtras.h"
11#include "llvm/ADT/SmallVector.h"
12#include "llvm/ADT/StringRef.h"
13#include "llvm/ADT/StringSwitch.h"
14#include "llvm/ADT/Triple.h"
15#include "llvm/ADT/Twine.h"
16#include "llvm/BinaryFormat/MachO.h"
17#include "llvm/MC/MCContext.h"
18#include "llvm/MC/MCDirectives.h"
19#include "llvm/MC/MCObjectFileInfo.h"
20#include "llvm/MC/MCParser/MCAsmLexer.h"
21#include "llvm/MC/MCParser/MCAsmParser.h"
22#include "llvm/MC/MCParser/MCAsmParserExtension.h"
23#include "llvm/MC/MCSectionMachO.h"
24#include "llvm/MC/MCStreamer.h"
25#include "llvm/MC/MCSymbol.h"
26#include "llvm/MC/SectionKind.h"
27#include "llvm/Support/FileSystem.h"
28#include "llvm/Support/MemoryBuffer.h"
29#include "llvm/Support/SMLoc.h"
30#include "llvm/Support/SourceMgr.h"
31#include "llvm/Support/raw_ostream.h"
32#include <algorithm>
33#include <cstddef>
34#include <cstdint>
35#include <string>
36#include <system_error>
37#include <utility>
38
39using namespace llvm;
40
41namespace {
42
43/// \brief Implementation of directive handling which is shared across all
44/// Darwin targets.
45class DarwinAsmParser : public MCAsmParserExtension {
46 template<bool (DarwinAsmParser::*HandlerMethod)(StringRef, SMLoc)>
47 void addDirectiveHandler(StringRef Directive) {
48 MCAsmParser::ExtensionDirectiveHandler Handler = std::make_pair(
49 this, HandleDirective<DarwinAsmParser, HandlerMethod>);
50 getParser().addDirectiveHandler(Directive, Handler);
51 }
52
53 bool parseSectionSwitch(StringRef Segment, StringRef Section,
54 unsigned TAA = 0, unsigned ImplicitAlign = 0,
55 unsigned StubSize = 0);
56
57 SMLoc LastVersionDirective;
58
59public:
60 DarwinAsmParser() = default;
61
62 void Initialize(MCAsmParser &Parser) override {
63 // Call the base implementation.
64 this->MCAsmParserExtension::Initialize(Parser);
65
66 addDirectiveHandler<&DarwinAsmParser::parseDirectiveAltEntry>(".alt_entry");
67 addDirectiveHandler<&DarwinAsmParser::parseDirectiveDesc>(".desc");
68 addDirectiveHandler<&DarwinAsmParser::parseDirectiveIndirectSymbol>(
69 ".indirect_symbol");
70 addDirectiveHandler<&DarwinAsmParser::parseDirectiveLsym>(".lsym");
71 addDirectiveHandler<&DarwinAsmParser::parseDirectiveSubsectionsViaSymbols>(
72 ".subsections_via_symbols");
73 addDirectiveHandler<&DarwinAsmParser::parseDirectiveDumpOrLoad>(".dump");
74 addDirectiveHandler<&DarwinAsmParser::parseDirectiveDumpOrLoad>(".load");
75 addDirectiveHandler<&DarwinAsmParser::parseDirectiveSection>(".section");
76 addDirectiveHandler<&DarwinAsmParser::parseDirectivePushSection>(
77 ".pushsection");
78 addDirectiveHandler<&DarwinAsmParser::parseDirectivePopSection>(
79 ".popsection");
80 addDirectiveHandler<&DarwinAsmParser::parseDirectivePrevious>(".previous");
81 addDirectiveHandler<&DarwinAsmParser::parseDirectiveSecureLogUnique>(
82 ".secure_log_unique");
83 addDirectiveHandler<&DarwinAsmParser::parseDirectiveSecureLogReset>(
84 ".secure_log_reset");
85 addDirectiveHandler<&DarwinAsmParser::parseDirectiveTBSS>(".tbss");
86 addDirectiveHandler<&DarwinAsmParser::parseDirectiveZerofill>(".zerofill");
87
88 addDirectiveHandler<&DarwinAsmParser::parseDirectiveDataRegion>(
89 ".data_region");
90 addDirectiveHandler<&DarwinAsmParser::parseDirectiveDataRegionEnd>(
91 ".end_data_region");
92
93 // Special section directives.
94 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveBss>(".bss");
95 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveConst>(".const");
96 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveConstData>(
97 ".const_data");
98 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveConstructor>(
99 ".constructor");
100 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveCString>(
101 ".cstring");
102 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveData>(".data");
103 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveDestructor>(
104 ".destructor");
105 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveDyld>(".dyld");
106 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveFVMLibInit0>(
107 ".fvmlib_init0");
108 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveFVMLibInit1>(
109 ".fvmlib_init1");
110 addDirectiveHandler<
111 &DarwinAsmParser::parseSectionDirectiveLazySymbolPointers>(
112 ".lazy_symbol_pointer");
113 addDirectiveHandler<&DarwinAsmParser::parseDirectiveLinkerOption>(
114 ".linker_option");
115 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveLiteral16>(
116 ".literal16");
117 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveLiteral4>(
118 ".literal4");
119 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveLiteral8>(
120 ".literal8");
121 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveModInitFunc>(
122 ".mod_init_func");
123 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveModTermFunc>(
124 ".mod_term_func");
125 addDirectiveHandler<
126 &DarwinAsmParser::parseSectionDirectiveNonLazySymbolPointers>(
127 ".non_lazy_symbol_pointer");
128 addDirectiveHandler<
129 &DarwinAsmParser::parseSectionDirectiveThreadLocalVariablePointers>(
130 ".thread_local_variable_pointer");
131 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCCatClsMeth>(
132 ".objc_cat_cls_meth");
133 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCCatInstMeth>(
134 ".objc_cat_inst_meth");
135 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCCategory>(
136 ".objc_category");
137 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCClass>(
138 ".objc_class");
139 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCClassNames>(
140 ".objc_class_names");
141 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCClassVars>(
142 ".objc_class_vars");
143 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCClsMeth>(
144 ".objc_cls_meth");
145 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCClsRefs>(
146 ".objc_cls_refs");
147 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCInstMeth>(
148 ".objc_inst_meth");
149 addDirectiveHandler<
150 &DarwinAsmParser::parseSectionDirectiveObjCInstanceVars>(
151 ".objc_instance_vars");
152 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCMessageRefs>(
153 ".objc_message_refs");
154 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCMetaClass>(
155 ".objc_meta_class");
156 addDirectiveHandler<
157 &DarwinAsmParser::parseSectionDirectiveObjCMethVarNames>(
158 ".objc_meth_var_names");
159 addDirectiveHandler<
160 &DarwinAsmParser::parseSectionDirectiveObjCMethVarTypes>(
161 ".objc_meth_var_types");
162 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCModuleInfo>(
163 ".objc_module_info");
164 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCProtocol>(
165 ".objc_protocol");
166 addDirectiveHandler<
167 &DarwinAsmParser::parseSectionDirectiveObjCSelectorStrs>(
168 ".objc_selector_strs");
169 addDirectiveHandler<
170 &DarwinAsmParser::parseSectionDirectiveObjCStringObject>(
171 ".objc_string_object");
172 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveObjCSymbols>(
173 ".objc_symbols");
174 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectivePICSymbolStub>(
175 ".picsymbol_stub");
176 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveStaticConst>(
177 ".static_const");
178 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveStaticData>(
179 ".static_data");
180 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveSymbolStub>(
181 ".symbol_stub");
182 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveTData>(".tdata");
183 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveText>(".text");
184 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveThreadInitFunc>(
185 ".thread_init_func");
186 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveTLV>(".tlv");
187
188 addDirectiveHandler<&DarwinAsmParser::parseSectionDirectiveIdent>(".ident");
189 addDirectiveHandler<&DarwinAsmParser::parseWatchOSVersionMin>(
190 ".watchos_version_min");
191 addDirectiveHandler<&DarwinAsmParser::parseTvOSVersionMin>(
192 ".tvos_version_min");
193 addDirectiveHandler<&DarwinAsmParser::parseIOSVersionMin>(
194 ".ios_version_min");
195 addDirectiveHandler<&DarwinAsmParser::parseMacOSXVersionMin>(
196 ".macosx_version_min");
197 addDirectiveHandler<&DarwinAsmParser::parseBuildVersion>(".build_version");
198
199 LastVersionDirective = SMLoc();
200 }
201
202 bool parseDirectiveAltEntry(StringRef, SMLoc);
203 bool parseDirectiveDesc(StringRef, SMLoc);
204 bool parseDirectiveIndirectSymbol(StringRef, SMLoc);
205 bool parseDirectiveDumpOrLoad(StringRef, SMLoc);
206 bool parseDirectiveLsym(StringRef, SMLoc);
207 bool parseDirectiveLinkerOption(StringRef, SMLoc);
208 bool parseDirectiveSection(StringRef, SMLoc);
209 bool parseDirectivePushSection(StringRef, SMLoc);
210 bool parseDirectivePopSection(StringRef, SMLoc);
211 bool parseDirectivePrevious(StringRef, SMLoc);
212 bool parseDirectiveSecureLogReset(StringRef, SMLoc);
213 bool parseDirectiveSecureLogUnique(StringRef, SMLoc);
214 bool parseDirectiveSubsectionsViaSymbols(StringRef, SMLoc);
215 bool parseDirectiveTBSS(StringRef, SMLoc);
216 bool parseDirectiveZerofill(StringRef, SMLoc);
217 bool parseDirectiveDataRegion(StringRef, SMLoc);
218 bool parseDirectiveDataRegionEnd(StringRef, SMLoc);
219
220 // Named Section Directive
221 bool parseSectionDirectiveBss(StringRef, SMLoc) {
222 return parseSectionSwitch("__DATA", "__bss");
223 }
224
225 bool parseSectionDirectiveConst(StringRef, SMLoc) {
226 return parseSectionSwitch("__TEXT", "__const");
227 }
228
229 bool parseSectionDirectiveStaticConst(StringRef, SMLoc) {
230 return parseSectionSwitch("__TEXT", "__static_const");
231 }
232
233 bool parseSectionDirectiveCString(StringRef, SMLoc) {
234 return parseSectionSwitch("__TEXT","__cstring",
235 MachO::S_CSTRING_LITERALS);
236 }
237
238 bool parseSectionDirectiveLiteral4(StringRef, SMLoc) {
239 return parseSectionSwitch("__TEXT", "__literal4",
240 MachO::S_4BYTE_LITERALS, 4);
241 }
242
243 bool parseSectionDirectiveLiteral8(StringRef, SMLoc) {
244 return parseSectionSwitch("__TEXT", "__literal8",
245 MachO::S_8BYTE_LITERALS, 8);
246 }
247
248 bool parseSectionDirectiveLiteral16(StringRef, SMLoc) {
249 return parseSectionSwitch("__TEXT","__literal16",
250 MachO::S_16BYTE_LITERALS, 16);
251 }
252
253 bool parseSectionDirectiveConstructor(StringRef, SMLoc) {
254 return parseSectionSwitch("__TEXT","__constructor");
255 }
256
257 bool parseSectionDirectiveDestructor(StringRef, SMLoc) {
258 return parseSectionSwitch("__TEXT","__destructor");
259 }
260
261 bool parseSectionDirectiveFVMLibInit0(StringRef, SMLoc) {
262 return parseSectionSwitch("__TEXT","__fvmlib_init0");
263 }
264
265 bool parseSectionDirectiveFVMLibInit1(StringRef, SMLoc) {
266 return parseSectionSwitch("__TEXT","__fvmlib_init1");
267 }
268
269 bool parseSectionDirectiveSymbolStub(StringRef, SMLoc) {
270 return parseSectionSwitch("__TEXT","__symbol_stub",
271 MachO::S_SYMBOL_STUBS |
272 MachO::S_ATTR_PURE_INSTRUCTIONS,
273 // FIXME: Different on PPC and ARM.
274 0, 16);
275 }
276
277 bool parseSectionDirectivePICSymbolStub(StringRef, SMLoc) {
278 return parseSectionSwitch("__TEXT","__picsymbol_stub",
279 MachO::S_SYMBOL_STUBS |
280 MachO::S_ATTR_PURE_INSTRUCTIONS, 0, 26);
281 }
282
283 bool parseSectionDirectiveData(StringRef, SMLoc) {
284 return parseSectionSwitch("__DATA", "__data");
285 }
286
287 bool parseSectionDirectiveStaticData(StringRef, SMLoc) {
288 return parseSectionSwitch("__DATA", "__static_data");
289 }
290
291 bool parseSectionDirectiveNonLazySymbolPointers(StringRef, SMLoc) {
292 return parseSectionSwitch("__DATA", "__nl_symbol_ptr",
293 MachO::S_NON_LAZY_SYMBOL_POINTERS, 4);
294 }
295
296 bool parseSectionDirectiveLazySymbolPointers(StringRef, SMLoc) {
297 return parseSectionSwitch("__DATA", "__la_symbol_ptr",
298 MachO::S_LAZY_SYMBOL_POINTERS, 4);
299 }
300
301 bool parseSectionDirectiveThreadLocalVariablePointers(StringRef, SMLoc) {
302 return parseSectionSwitch("__DATA", "__thread_ptr",
303 MachO::S_THREAD_LOCAL_VARIABLE_POINTERS, 4);
304 }
305
306 bool parseSectionDirectiveDyld(StringRef, SMLoc) {
307 return parseSectionSwitch("__DATA", "__dyld");
308 }
309
310 bool parseSectionDirectiveModInitFunc(StringRef, SMLoc) {
311 return parseSectionSwitch("__DATA", "__mod_init_func",
312 MachO::S_MOD_INIT_FUNC_POINTERS, 4);
313 }
314
315 bool parseSectionDirectiveModTermFunc(StringRef, SMLoc) {
316 return parseSectionSwitch("__DATA", "__mod_term_func",
317 MachO::S_MOD_TERM_FUNC_POINTERS, 4);
318 }
319
320 bool parseSectionDirectiveConstData(StringRef, SMLoc) {
321 return parseSectionSwitch("__DATA", "__const");
322 }
323
324 bool parseSectionDirectiveObjCClass(StringRef, SMLoc) {
325 return parseSectionSwitch("__OBJC", "__class",
326 MachO::S_ATTR_NO_DEAD_STRIP);
327 }
328
329 bool parseSectionDirectiveObjCMetaClass(StringRef, SMLoc) {
330 return parseSectionSwitch("__OBJC", "__meta_class",
331 MachO::S_ATTR_NO_DEAD_STRIP);
332 }
333
334 bool parseSectionDirectiveObjCCatClsMeth(StringRef, SMLoc) {
335 return parseSectionSwitch("__OBJC", "__cat_cls_meth",
336 MachO::S_ATTR_NO_DEAD_STRIP);
337 }
338
339 bool parseSectionDirectiveObjCCatInstMeth(StringRef, SMLoc) {
340 return parseSectionSwitch("__OBJC", "__cat_inst_meth",
341 MachO::S_ATTR_NO_DEAD_STRIP);
342 }
343
344 bool parseSectionDirectiveObjCProtocol(StringRef, SMLoc) {
345 return parseSectionSwitch("__OBJC", "__protocol",
346 MachO::S_ATTR_NO_DEAD_STRIP);
347 }
348
349 bool parseSectionDirectiveObjCStringObject(StringRef, SMLoc) {
350 return parseSectionSwitch("__OBJC", "__string_object",
351 MachO::S_ATTR_NO_DEAD_STRIP);
352 }
353
354 bool parseSectionDirectiveObjCClsMeth(StringRef, SMLoc) {
355 return parseSectionSwitch("__OBJC", "__cls_meth",
356 MachO::S_ATTR_NO_DEAD_STRIP);
357 }
358
359 bool parseSectionDirectiveObjCInstMeth(StringRef, SMLoc) {
360 return parseSectionSwitch("__OBJC", "__inst_meth",
361 MachO::S_ATTR_NO_DEAD_STRIP);
362 }
363
364 bool parseSectionDirectiveObjCClsRefs(StringRef, SMLoc) {
365 return parseSectionSwitch("__OBJC", "__cls_refs",
366 MachO::S_ATTR_NO_DEAD_STRIP |
367 MachO::S_LITERAL_POINTERS, 4);
368 }
369
370 bool parseSectionDirectiveObjCMessageRefs(StringRef, SMLoc) {
371 return parseSectionSwitch("__OBJC", "__message_refs",
372 MachO::S_ATTR_NO_DEAD_STRIP |
373 MachO::S_LITERAL_POINTERS, 4);
374 }
375
376 bool parseSectionDirectiveObjCSymbols(StringRef, SMLoc) {
377 return parseSectionSwitch("__OBJC", "__symbols",
378 MachO::S_ATTR_NO_DEAD_STRIP);
379 }
380
381 bool parseSectionDirectiveObjCCategory(StringRef, SMLoc) {
382 return parseSectionSwitch("__OBJC", "__category",
383 MachO::S_ATTR_NO_DEAD_STRIP);
384 }
385
386 bool parseSectionDirectiveObjCClassVars(StringRef, SMLoc) {
387 return parseSectionSwitch("__OBJC", "__class_vars",
388 MachO::S_ATTR_NO_DEAD_STRIP);
389 }
390
391 bool parseSectionDirectiveObjCInstanceVars(StringRef, SMLoc) {
392 return parseSectionSwitch("__OBJC", "__instance_vars",
393 MachO::S_ATTR_NO_DEAD_STRIP);
394 }
395
396 bool parseSectionDirectiveObjCModuleInfo(StringRef, SMLoc) {
397 return parseSectionSwitch("__OBJC", "__module_info",
398 MachO::S_ATTR_NO_DEAD_STRIP);
399 }
400
401 bool parseSectionDirectiveObjCClassNames(StringRef, SMLoc) {
402 return parseSectionSwitch("__TEXT", "__cstring",
403 MachO::S_CSTRING_LITERALS);
404 }
405
406 bool parseSectionDirectiveObjCMethVarTypes(StringRef, SMLoc) {
407 return parseSectionSwitch("__TEXT", "__cstring",
408 MachO::S_CSTRING_LITERALS);
409 }
410
411 bool parseSectionDirectiveObjCMethVarNames(StringRef, SMLoc) {
412 return parseSectionSwitch("__TEXT", "__cstring",
413 MachO::S_CSTRING_LITERALS);
414 }
415
416 bool parseSectionDirectiveObjCSelectorStrs(StringRef, SMLoc) {
417 return parseSectionSwitch("__OBJC", "__selector_strs",
418 MachO::S_CSTRING_LITERALS);
419 }
420
421 bool parseSectionDirectiveTData(StringRef, SMLoc) {
422 return parseSectionSwitch("__DATA", "__thread_data",
423 MachO::S_THREAD_LOCAL_REGULAR);
424 }
425
426 bool parseSectionDirectiveText(StringRef, SMLoc) {
427 return parseSectionSwitch("__TEXT", "__text",
428 MachO::S_ATTR_PURE_INSTRUCTIONS);
429 }
430
431 bool parseSectionDirectiveTLV(StringRef, SMLoc) {
432 return parseSectionSwitch("__DATA", "__thread_vars",
433 MachO::S_THREAD_LOCAL_VARIABLES);
434 }
435
436 bool parseSectionDirectiveIdent(StringRef, SMLoc) {
437 // Darwin silently ignores the .ident directive.
438 getParser().eatToEndOfStatement();
439 return false;
440 }
441
442 bool parseSectionDirectiveThreadInitFunc(StringRef, SMLoc) {
443 return parseSectionSwitch("__DATA", "__thread_init",
444 MachO::S_THREAD_LOCAL_INIT_FUNCTION_POINTERS);
445 }
446
447 bool parseWatchOSVersionMin(StringRef Directive, SMLoc Loc) {
448 return parseVersionMin(Directive, Loc, MCVM_WatchOSVersionMin);
449 }
450 bool parseTvOSVersionMin(StringRef Directive, SMLoc Loc) {
451 return parseVersionMin(Directive, Loc, MCVM_TvOSVersionMin);
452 }
453 bool parseIOSVersionMin(StringRef Directive, SMLoc Loc) {
454 return parseVersionMin(Directive, Loc, MCVM_IOSVersionMin);
455 }
456 bool parseMacOSXVersionMin(StringRef Directive, SMLoc Loc) {
457 return parseVersionMin(Directive, Loc, MCVM_OSXVersionMin);
458 }
459
460 bool parseBuildVersion(StringRef Directive, SMLoc Loc);
461 bool parseVersionMin(StringRef Directive, SMLoc Loc, MCVersionMinType Type);
462 bool parseVersion(unsigned *Major, unsigned *Minor, unsigned *Update);
463 void checkVersion(StringRef Directive, StringRef Arg, SMLoc Loc,
464 Triple::OSType ExpectedOS);
465};
466
467} // end anonymous namespace
468
469bool DarwinAsmParser::parseSectionSwitch(StringRef Segment, StringRef Section,
470 unsigned TAA, unsigned Align,
471 unsigned StubSize) {
472 if (getLexer().isNot(AsmToken::EndOfStatement))
473 return TokError("unexpected token in section switching directive");
474 Lex();
475
476 // FIXME: Arch specific.
477 bool isText = TAA & MachO::S_ATTR_PURE_INSTRUCTIONS;
478 getStreamer().SwitchSection(getContext().getMachOSection(
479 Segment, Section, TAA, StubSize,
480 isText ? SectionKind::getText() : SectionKind::getData()));
481
482 // Set the implicit alignment, if any.
483 //
484 // FIXME: This isn't really what 'as' does; I think it just uses the implicit
485 // alignment on the section (e.g., if one manually inserts bytes into the
486 // section, then just issuing the section switch directive will not realign
487 // the section. However, this is arguably more reasonable behavior, and there
488 // is no good reason for someone to intentionally emit incorrectly sized
489 // values into the implicitly aligned sections.
490 if (Align)
491 getStreamer().EmitValueToAlignment(Align);
492
493 return false;
494}
495
496/// parseDirectiveAltEntry
497/// ::= .alt_entry identifier
498bool DarwinAsmParser::parseDirectiveAltEntry(StringRef, SMLoc) {
499 StringRef Name;
500 if (getParser().parseIdentifier(Name))
501 return TokError("expected identifier in directive");
502
503 // Look up symbol.
504 MCSymbol *Sym = getContext().getOrCreateSymbol(Name);
505
506 if (Sym->isDefined())
507 return TokError(".alt_entry must preceed symbol definition");
508
509 if (!getStreamer().EmitSymbolAttribute(Sym, MCSA_AltEntry))
510 return TokError("unable to emit symbol attribute");
511
512 Lex();
513 return false;
514}
515
516/// parseDirectiveDesc
517/// ::= .desc identifier , expression
518bool DarwinAsmParser::parseDirectiveDesc(StringRef, SMLoc) {
519 StringRef Name;
520 if (getParser().parseIdentifier(Name))
521 return TokError("expected identifier in directive");
522
523 // Handle the identifier as the key symbol.
524 MCSymbol *Sym = getContext().getOrCreateSymbol(Name);
525
526 if (getLexer().isNot(AsmToken::Comma))
527 return TokError("unexpected token in '.desc' directive");
528 Lex();
529
530 int64_t DescValue;
531 if (getParser().parseAbsoluteExpression(DescValue))
532 return true;
533
534 if (getLexer().isNot(AsmToken::EndOfStatement))
535 return TokError("unexpected token in '.desc' directive");
536
537 Lex();
538
539 // Set the n_desc field of this Symbol to this DescValue
540 getStreamer().EmitSymbolDesc(Sym, DescValue);
541
542 return false;
543}
544
545/// parseDirectiveIndirectSymbol
546/// ::= .indirect_symbol identifier
547bool DarwinAsmParser::parseDirectiveIndirectSymbol(StringRef, SMLoc Loc) {
548 const MCSectionMachO *Current = static_cast<const MCSectionMachO *>(
549 getStreamer().getCurrentSectionOnly());
550 MachO::SectionType SectionType = Current->getType();
551 if (SectionType != MachO::S_NON_LAZY_SYMBOL_POINTERS &&
552 SectionType != MachO::S_LAZY_SYMBOL_POINTERS &&
553 SectionType != MachO::S_THREAD_LOCAL_VARIABLE_POINTERS &&
554 SectionType != MachO::S_SYMBOL_STUBS)
555 return Error(Loc, "indirect symbol not in a symbol pointer or stub "
556 "section");
557
558 StringRef Name;
559 if (getParser().parseIdentifier(Name))
560 return TokError("expected identifier in .indirect_symbol directive");
561
562 MCSymbol *Sym = getContext().getOrCreateSymbol(Name);
563
564 // Assembler local symbols don't make any sense here. Complain loudly.
565 if (Sym->isTemporary())
566 return TokError("non-local symbol required in directive");
567
568 if (!getStreamer().EmitSymbolAttribute(Sym, MCSA_IndirectSymbol))
569 return TokError("unable to emit indirect symbol attribute for: " + Name);
570
571 if (getLexer().isNot(AsmToken::EndOfStatement))
572 return TokError("unexpected token in '.indirect_symbol' directive");
573
574 Lex();
575
576 return false;
577}
578
579/// parseDirectiveDumpOrLoad
580/// ::= ( .dump | .load ) "filename"
581bool DarwinAsmParser::parseDirectiveDumpOrLoad(StringRef Directive,
582 SMLoc IDLoc) {
583 bool IsDump = Directive == ".dump";
584 if (getLexer().isNot(AsmToken::String))
585 return TokError("expected string in '.dump' or '.load' directive");
586
587 Lex();
588
589 if (getLexer().isNot(AsmToken::EndOfStatement))
590 return TokError("unexpected token in '.dump' or '.load' directive");
591
592 Lex();
593
594 // FIXME: If/when .dump and .load are implemented they will be done in the
595 // the assembly parser and not have any need for an MCStreamer API.
596 if (IsDump)
597 return Warning(IDLoc, "ignoring directive .dump for now");
598 else
599 return Warning(IDLoc, "ignoring directive .load for now");
600}
601
602/// ParseDirectiveLinkerOption
603/// ::= .linker_option "string" ( , "string" )*
604bool DarwinAsmParser::parseDirectiveLinkerOption(StringRef IDVal, SMLoc) {
605 SmallVector<std::string, 4> Args;
606 while (true) {
607 if (getLexer().isNot(AsmToken::String))
608 return TokError("expected string in '" + Twine(IDVal) + "' directive");
609
610 std::string Data;
611 if (getParser().parseEscapedString(Data))
612 return true;
613
614 Args.push_back(Data);
615
616 if (getLexer().is(AsmToken::EndOfStatement))
617 break;
618
619 if (getLexer().isNot(AsmToken::Comma))
620 return TokError("unexpected token in '" + Twine(IDVal) + "' directive");
621 Lex();
622 }
623
624 getStreamer().EmitLinkerOptions(Args);
625 return false;
626}
627
628/// parseDirectiveLsym
629/// ::= .lsym identifier , expression
630bool DarwinAsmParser::parseDirectiveLsym(StringRef, SMLoc) {
631 StringRef Name;
632 if (getParser().parseIdentifier(Name))
633 return TokError("expected identifier in directive");
634
635 // Handle the identifier as the key symbol.
636 MCSymbol *Sym = getContext().getOrCreateSymbol(Name);
637
638 if (getLexer().isNot(AsmToken::Comma))
639 return TokError("unexpected token in '.lsym' directive");
640 Lex();
641
642 const MCExpr *Value;
643 if (getParser().parseExpression(Value))
644 return true;
645
646 if (getLexer().isNot(AsmToken::EndOfStatement))
647 return TokError("unexpected token in '.lsym' directive");
648
649 Lex();
650
651 // We don't currently support this directive.
652 //
653 // FIXME: Diagnostic location!
654 (void) Sym;
655 return TokError("directive '.lsym' is unsupported");
656}
657
658/// parseDirectiveSection:
659/// ::= .section identifier (',' identifier)*
660bool DarwinAsmParser::parseDirectiveSection(StringRef, SMLoc) {
661 SMLoc Loc = getLexer().getLoc();
662
663 StringRef SectionName;
664 if (getParser().parseIdentifier(SectionName))
665 return Error(Loc, "expected identifier after '.section' directive");
666
667 // Verify there is a following comma.
668 if (!getLexer().is(AsmToken::Comma))
669 return TokError("unexpected token in '.section' directive");
670
671 std::string SectionSpec = SectionName;
672 SectionSpec += ",";
673
674 // Add all the tokens until the end of the line, ParseSectionSpecifier will
675 // handle this.
676 StringRef EOL = getLexer().LexUntilEndOfStatement();
677 SectionSpec.append(EOL.begin(), EOL.end());
678
679 Lex();
680 if (getLexer().isNot(AsmToken::EndOfStatement))
681 return TokError("unexpected token in '.section' directive");
682 Lex();
683
684 StringRef Segment, Section;
685 unsigned StubSize;
686 unsigned TAA;
687 bool TAAParsed;
688 std::string ErrorStr =
689 MCSectionMachO::ParseSectionSpecifier(SectionSpec, Segment, Section,
690 TAA, TAAParsed, StubSize);
691
692 if (!ErrorStr.empty())
693 return Error(Loc, ErrorStr);
694
695 // Issue a warning if the target is not powerpc and Section is a *coal* section.
696 Triple TT = getParser().getContext().getObjectFileInfo()->getTargetTriple();
697 Triple::ArchType ArchTy = TT.getArch();
698
699 if (ArchTy != Triple::ppc && ArchTy != Triple::ppc64) {
700 StringRef NonCoalSection = StringSwitch<StringRef>(Section)
701 .Case("__textcoal_nt", "__text")
702 .Case("__const_coal", "__const")
703 .Case("__datacoal_nt", "__data")
704 .Default(Section);
705
706 if (!Section.equals(NonCoalSection)) {
707 StringRef SectionVal(Loc.getPointer());
708 size_t B = SectionVal.find(',') + 1, E = SectionVal.find(',', B);
709 SMLoc BLoc = SMLoc::getFromPointer(SectionVal.data() + B);
710 SMLoc ELoc = SMLoc::getFromPointer(SectionVal.data() + E);
711 getParser().Warning(Loc, "section \"" + Section + "\" is deprecated",
712 SMRange(BLoc, ELoc));
713 getParser().Note(Loc, "change section name to \"" + NonCoalSection +
714 "\"", SMRange(BLoc, ELoc));
715 }
716 }
717
718 // FIXME: Arch specific.
719 bool isText = Segment == "__TEXT"; // FIXME: Hack.
720 getStreamer().SwitchSection(getContext().getMachOSection(
721 Segment, Section, TAA, StubSize,
722 isText ? SectionKind::getText() : SectionKind::getData()));
723 return false;
724}
725
726/// ParseDirectivePushSection:
727/// ::= .pushsection identifier (',' identifier)*
728bool DarwinAsmParser::parseDirectivePushSection(StringRef S, SMLoc Loc) {
729 getStreamer().PushSection();
730
731 if (parseDirectiveSection(S, Loc)) {
732 getStreamer().PopSection();
733 return true;
734 }
735
736 return false;
737}
738
739/// ParseDirectivePopSection:
740/// ::= .popsection
741bool DarwinAsmParser::parseDirectivePopSection(StringRef, SMLoc) {
742 if (!getStreamer().PopSection())
743 return TokError(".popsection without corresponding .pushsection");
744 return false;
745}
746
747/// ParseDirectivePrevious:
748/// ::= .previous
749bool DarwinAsmParser::parseDirectivePrevious(StringRef DirName, SMLoc) {
750 MCSectionSubPair PreviousSection = getStreamer().getPreviousSection();
751 if (!PreviousSection.first)
752 return TokError(".previous without corresponding .section");
753 getStreamer().SwitchSection(PreviousSection.first, PreviousSection.second);
754 return false;
755}
756
757/// ParseDirectiveSecureLogUnique
758/// ::= .secure_log_unique ... message ...
759bool DarwinAsmParser::parseDirectiveSecureLogUnique(StringRef, SMLoc IDLoc) {
760 StringRef LogMessage = getParser().parseStringToEndOfStatement();
761 if (getLexer().isNot(AsmToken::EndOfStatement))
762 return TokError("unexpected token in '.secure_log_unique' directive");
763
764 if (getContext().getSecureLogUsed())
765 return Error(IDLoc, ".secure_log_unique specified multiple times");
766
767 // Get the secure log path.
768 const char *SecureLogFile = getContext().getSecureLogFile();
769 if (!SecureLogFile)
770 return Error(IDLoc, ".secure_log_unique used but AS_SECURE_LOG_FILE "
771 "environment variable unset.");
772
773 // Open the secure log file if we haven't already.
774 raw_fd_ostream *OS = getContext().getSecureLog();
775 if (!OS) {
776 std::error_code EC;
777 auto NewOS = llvm::make_unique<raw_fd_ostream>(
778 StringRef(SecureLogFile), EC, sys::fs::F_Append | sys::fs::F_Text);
779 if (EC)
780 return Error(IDLoc, Twine("can't open secure log file: ") +
781 SecureLogFile + " (" + EC.message() + ")");
782 OS = NewOS.get();
783 getContext().setSecureLog(std::move(NewOS));
784 }
785
786 // Write the message.
787 unsigned CurBuf = getSourceManager().FindBufferContainingLoc(IDLoc);
788 *OS << getSourceManager().getBufferInfo(CurBuf).Buffer->getBufferIdentifier()
789 << ":" << getSourceManager().FindLineNumber(IDLoc, CurBuf) << ":"
790 << LogMessage + "\n";
791
792 getContext().setSecureLogUsed(true);
793
794 return false;
795}
796
797/// ParseDirectiveSecureLogReset
798/// ::= .secure_log_reset
799bool DarwinAsmParser::parseDirectiveSecureLogReset(StringRef, SMLoc IDLoc) {
800 if (getLexer().isNot(AsmToken::EndOfStatement))
801 return TokError("unexpected token in '.secure_log_reset' directive");
802
803 Lex();
804
805 getContext().setSecureLogUsed(false);
806
807 return false;
808}
809
810/// parseDirectiveSubsectionsViaSymbols
811/// ::= .subsections_via_symbols
812bool DarwinAsmParser::parseDirectiveSubsectionsViaSymbols(StringRef, SMLoc) {
813 if (getLexer().isNot(AsmToken::EndOfStatement))
814 return TokError("unexpected token in '.subsections_via_symbols' directive");
815
816 Lex();
817
818 getStreamer().EmitAssemblerFlag(MCAF_SubsectionsViaSymbols);
819
820 return false;
821}
822
823/// ParseDirectiveTBSS
824/// ::= .tbss identifier, size, align
825bool DarwinAsmParser::parseDirectiveTBSS(StringRef, SMLoc) {
826 SMLoc IDLoc = getLexer().getLoc();
827 StringRef Name;
828 if (getParser().parseIdentifier(Name))
829 return TokError("expected identifier in directive");
830
831 // Handle the identifier as the key symbol.
832 MCSymbol *Sym = getContext().getOrCreateSymbol(Name);
833
834 if (getLexer().isNot(AsmToken::Comma))
835 return TokError("unexpected token in directive");
836 Lex();
837
838 int64_t Size;
839 SMLoc SizeLoc = getLexer().getLoc();
840 if (getParser().parseAbsoluteExpression(Size))
841 return true;
842
843 int64_t Pow2Alignment = 0;
844 SMLoc Pow2AlignmentLoc;
845 if (getLexer().is(AsmToken::Comma)) {
846 Lex();
847 Pow2AlignmentLoc = getLexer().getLoc();
848 if (getParser().parseAbsoluteExpression(Pow2Alignment))
849 return true;
850 }
851
852 if (getLexer().isNot(AsmToken::EndOfStatement))
853 return TokError("unexpected token in '.tbss' directive");
854
855 Lex();
856
857 if (Size < 0)
858 return Error(SizeLoc, "invalid '.tbss' directive size, can't be less than"
859 "zero");
860
861 // FIXME: Diagnose overflow.
862 if (Pow2Alignment < 0)
863 return Error(Pow2AlignmentLoc, "invalid '.tbss' alignment, can't be less"
864 "than zero");
865
866 if (!Sym->isUndefined())
867 return Error(IDLoc, "invalid symbol redefinition");
868
869 getStreamer().EmitTBSSSymbol(getContext().getMachOSection(
870 "__DATA", "__thread_bss",
871 MachO::S_THREAD_LOCAL_ZEROFILL,
872 0, SectionKind::getThreadBSS()),
873 Sym, Size, 1 << Pow2Alignment);
874
875 return false;
876}
877
878/// ParseDirectiveZerofill
879/// ::= .zerofill segname , sectname [, identifier , size_expression [
880/// , align_expression ]]
881bool DarwinAsmParser::parseDirectiveZerofill(StringRef, SMLoc) {
882 StringRef Segment;
883 if (getParser().parseIdentifier(Segment))
884 return TokError("expected segment name after '.zerofill' directive");
885
886 if (getLexer().isNot(AsmToken::Comma))
887 return TokError("unexpected token in directive");
888 Lex();
889
890 StringRef Section;
891 if (getParser().parseIdentifier(Section))
892 return TokError("expected section name after comma in '.zerofill' "
893 "directive");
894
895 // If this is the end of the line all that was wanted was to create the
896 // the section but with no symbol.
897 if (getLexer().is(AsmToken::EndOfStatement)) {
898 // Create the zerofill section but no symbol
899 getStreamer().EmitZerofill(getContext().getMachOSection(
900 Segment, Section, MachO::S_ZEROFILL,
901 0, SectionKind::getBSS()));
902 return false;
903 }
904
905 if (getLexer().isNot(AsmToken::Comma))
906 return TokError("unexpected token in directive");
907 Lex();
908
909 SMLoc IDLoc = getLexer().getLoc();
910 StringRef IDStr;
911 if (getParser().parseIdentifier(IDStr))
912 return TokError("expected identifier in directive");
913
914 // handle the identifier as the key symbol.
915 MCSymbol *Sym = getContext().getOrCreateSymbol(IDStr);
916
917 if (getLexer().isNot(AsmToken::Comma))
918 return TokError("unexpected token in directive");
919 Lex();
920
921 int64_t Size;
922 SMLoc SizeLoc = getLexer().getLoc();
923 if (getParser().parseAbsoluteExpression(Size))
924 return true;
925
926 int64_t Pow2Alignment = 0;
927 SMLoc Pow2AlignmentLoc;
928 if (getLexer().is(AsmToken::Comma)) {
929 Lex();
930 Pow2AlignmentLoc = getLexer().getLoc();
931 if (getParser().parseAbsoluteExpression(Pow2Alignment))
932 return true;
933 }
934
935 if (getLexer().isNot(AsmToken::EndOfStatement))
936 return TokError("unexpected token in '.zerofill' directive");
937
938 Lex();
939
940 if (Size < 0)
941 return Error(SizeLoc, "invalid '.zerofill' directive size, can't be less "
942 "than zero");
943
944 // NOTE: The alignment in the directive is a power of 2 value, the assembler
945 // may internally end up wanting an alignment in bytes.
946 // FIXME: Diagnose overflow.
947 if (Pow2Alignment < 0)
948 return Error(Pow2AlignmentLoc, "invalid '.zerofill' directive alignment, "
949 "can't be less than zero");
950
951 if (!Sym->isUndefined())
952 return Error(IDLoc, "invalid symbol redefinition");
953
954 // Create the zerofill Symbol with Size and Pow2Alignment
955 //
956 // FIXME: Arch specific.
957 getStreamer().EmitZerofill(getContext().getMachOSection(
958 Segment, Section, MachO::S_ZEROFILL,
959 0, SectionKind::getBSS()),
960 Sym, Size, 1 << Pow2Alignment);
961
962 return false;
963}
964
965/// ParseDirectiveDataRegion
966/// ::= .data_region [ ( jt8 | jt16 | jt32 ) ]
967bool DarwinAsmParser::parseDirectiveDataRegion(StringRef, SMLoc) {
968 if (getLexer().is(AsmToken::EndOfStatement)) {
969 Lex();
970 getStreamer().EmitDataRegion(MCDR_DataRegion);
971 return false;
972 }
973 StringRef RegionType;
974 SMLoc Loc = getParser().getTok().getLoc();
975 if (getParser().parseIdentifier(RegionType))
976 return TokError("expected region type after '.data_region' directive");
977 int Kind = StringSwitch<int>(RegionType)
978 .Case("jt8", MCDR_DataRegionJT8)
979 .Case("jt16", MCDR_DataRegionJT16)
980 .Case("jt32", MCDR_DataRegionJT32)
981 .Default(-1);
982 if (Kind == -1)
983 return Error(Loc, "unknown region type in '.data_region' directive");
984 Lex();
985
986 getStreamer().EmitDataRegion((MCDataRegionType)Kind);
987 return false;
988}
989
990/// ParseDirectiveDataRegionEnd
991/// ::= .end_data_region
992bool DarwinAsmParser::parseDirectiveDataRegionEnd(StringRef, SMLoc) {
993 if (getLexer().isNot(AsmToken::EndOfStatement))
994 return TokError("unexpected token in '.end_data_region' directive");
995
996 Lex();
997 getStreamer().EmitDataRegion(MCDR_DataRegionEnd);
998 return false;
999}
1000
1001/// parseVersion ::= major, minor [, update]
1002bool DarwinAsmParser::parseVersion(unsigned *Major, unsigned *Minor,
1003 unsigned *Update) {
1004 // Get the major version number.
1005 if (getLexer().isNot(AsmToken::Integer))
7
Taking true branch
1006 return TokError("invalid OS major version number, integer expected");
8
Returning without writing to '*Major'
1007 int64_t MajorVal = getLexer().getTok().getIntVal();
1008 if (MajorVal > 65535 || MajorVal <= 0)
1009 return TokError("invalid OS major version number");
1010 *Major = (unsigned)MajorVal;
1011 Lex();
1012 if (getLexer().isNot(AsmToken::Comma))
1013 return TokError("OS minor version number required, comma expected");
1014 Lex();
1015 // Get the minor version number.
1016 if (getLexer().isNot(AsmToken::Integer))
1017 return TokError("invalid OS minor version number, integer expected");
1018 int64_t MinorVal = getLexer().getTok().getIntVal();
1019 if (MinorVal > 255 || MinorVal < 0)
1020 return TokError("invalid OS minor version number");
1021 *Minor = MinorVal;
1022 Lex();
1023
1024 // Get the update level, if specified
1025 *Update = 0;
1026 if (getLexer().is(AsmToken::EndOfStatement))
1027 return false;
1028 if (getLexer().isNot(AsmToken::Comma))
1029 return TokError("invalid OS update specifier, comma expected");
1030 Lex();
1031 if (getLexer().isNot(AsmToken::Integer))
1032 return TokError("invalid OS update version number, integer expected");
1033 int64_t UpdateVal = getLexer().getTok().getIntVal();
1034 if (UpdateVal > 255 || UpdateVal < 0)
1035 return TokError("invalid OS update version number");
1036 *Update = UpdateVal;
1037 Lex();
1038 return false;
1039}
1040
1041void DarwinAsmParser::checkVersion(StringRef Directive, StringRef Arg,
1042 SMLoc Loc, Triple::OSType ExpectedOS) {
1043 const Triple &Target = getContext().getObjectFileInfo()->getTargetTriple();
1044 if (Target.getOS() != ExpectedOS)
1045 Warning(Loc, Twine(Directive) +
1046 (Arg.empty() ? Twine() : Twine(' ') + Arg) +
1047 " used while targeting " + Target.getOSName());
1048
1049 if (LastVersionDirective.isValid()) {
1050 Warning(Loc, "overriding previous version directive");
1051 Note(LastVersionDirective, "previous definition is here");
1052 }
1053 LastVersionDirective = Loc;
1054}
1055
1056static Triple::OSType getOSTypeFromMCVM(MCVersionMinType Type) {
1057 switch (Type) {
1058 case MCVM_WatchOSVersionMin: return Triple::WatchOS;
1059 case MCVM_TvOSVersionMin: return Triple::TvOS;
1060 case MCVM_IOSVersionMin: return Triple::IOS;
1061 case MCVM_OSXVersionMin: return Triple::MacOSX;
1062 }
1063 llvm_unreachable("Invalid mc version min type")::llvm::llvm_unreachable_internal("Invalid mc version min type"
, "/build/llvm-toolchain-snapshot-7~svn329677/lib/MC/MCParser/DarwinAsmParser.cpp"
, 1063)
;
1064}
1065
1066/// parseVersionMin
1067/// ::= .ios_version_min parseVersion
1068/// | .macosx_version_min parseVersion
1069/// | .tvos_version_min parseVersion
1070/// | .watchos_version_min parseVersion
1071bool DarwinAsmParser::parseVersionMin(StringRef Directive, SMLoc Loc,
1072 MCVersionMinType Type) {
1073 unsigned Major;
1074 unsigned Minor;
1075 unsigned Update;
1076 if (parseVersion(&Major, &Minor, &Update))
1077 return true;
1078
1079 if (parseToken(AsmToken::EndOfStatement))
1080 return addErrorSuffix(Twine(" in '") + Directive + "' directive");
1081
1082 Triple::OSType ExpectedOS = getOSTypeFromMCVM(Type);
1083 checkVersion(Directive, StringRef(), Loc, ExpectedOS);
1084
1085 getStreamer().EmitVersionMin(Type, Major, Minor, Update);
1086 return false;
1087}
1088
1089static Triple::OSType getOSTypeFromPlatform(MachO::PlatformType Type) {
1090 switch (Type) {
1091 case MachO::PLATFORM_MACOS: return Triple::MacOSX;
1092 case MachO::PLATFORM_IOS: return Triple::IOS;
1093 case MachO::PLATFORM_TVOS: return Triple::TvOS;
1094 case MachO::PLATFORM_WATCHOS: return Triple::WatchOS;
1095 case MachO::PLATFORM_BRIDGEOS: /* silence warning */break;
1096 }
1097 llvm_unreachable("Invalid mach-o platform type")::llvm::llvm_unreachable_internal("Invalid mach-o platform type"
, "/build/llvm-toolchain-snapshot-7~svn329677/lib/MC/MCParser/DarwinAsmParser.cpp"
, 1097)
;
1098}
1099
1100/// parseBuildVersion
1101/// ::= .build_version (macos|ios|tvos|watchos), parseVersion
1102bool DarwinAsmParser::parseBuildVersion(StringRef Directive, SMLoc Loc) {
1103 StringRef PlatformName;
1104 SMLoc PlatformLoc = getTok().getLoc();
1105 if (getParser().parseIdentifier(PlatformName))
1
Assuming the condition is false
2
Taking false branch
1106 return TokError("platform name expected");
1107
1108 unsigned Platform = StringSwitch<unsigned>(PlatformName)
1109 .Case("macos", MachO::PLATFORM_MACOS)
1110 .Case("ios", MachO::PLATFORM_IOS)
1111 .Case("tvos", MachO::PLATFORM_TVOS)
1112 .Case("watchos", MachO::PLATFORM_WATCHOS)
1113 .Default(0);
1114 if (Platform == 0)
3
Taking false branch
1115 return Error(PlatformLoc, "unknown platform name");
1116
1117 if (getLexer().isNot(AsmToken::Comma))
4
Taking false branch
1118 return TokError("version number required, comma expected");
1119 Lex();
1120
1121 unsigned Major;
5
'Major' declared without an initial value
1122 unsigned Minor;
1123 unsigned Update;
1124 if (parseVersion(&Major, &Minor, &Update))
6
Calling 'DarwinAsmParser::parseVersion'
9
Returning from 'DarwinAsmParser::parseVersion'
10
Assuming the condition is false
11
Taking false branch
1125 return true;
1126
1127 if (parseToken(AsmToken::EndOfStatement))
12
Assuming the condition is false
13
Taking false branch
1128 return addErrorSuffix(" in '.build_version' directive");
1129
1130 Triple::OSType ExpectedOS
1131 = getOSTypeFromPlatform((MachO::PlatformType)Platform);
1132 checkVersion(Directive, PlatformName, Loc, ExpectedOS);
1133
1134 getStreamer().EmitBuildVersion(Platform, Major, Minor, Update);
14
2nd function call argument is an uninitialized value
1135 return false;
1136}
1137
1138
1139namespace llvm {
1140
1141MCAsmParserExtension *createDarwinAsmParser() {
1142 return new DarwinAsmParser;
1143}
1144
1145} // end llvm namespace