Bug Summary

File:lib/MC/MCParser/DarwinAsmParser.cpp
Warning:line 1082, column 16
1st 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-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 -analyzer-config-compatibility-mode=true -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-8/lib/clang/8.0.0 -D _DEBUG -D _GNU_SOURCE -D __STDC_CONSTANT_MACROS -D __STDC_FORMAT_MACROS -D __STDC_LIMIT_MACROS -I /build/llvm-toolchain-snapshot-8~svn350071/build-llvm/lib/MC/MCParser -I /build/llvm-toolchain-snapshot-8~svn350071/lib/MC/MCParser -I /build/llvm-toolchain-snapshot-8~svn350071/build-llvm/include -I /build/llvm-toolchain-snapshot-8~svn350071/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/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/include/clang/8.0.0/include/ -internal-isystem /usr/local/include -internal-isystem /usr/lib/llvm-8/lib/clang/8.0.0/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-8~svn350071/build-llvm/lib/MC/MCParser -fdebug-prefix-map=/build/llvm-toolchain-snapshot-8~svn350071=. -ferror-limit 19 -fmessage-length 0 -fvisibility-inlines-hidden -stack-protector 2 -fobjc-runtime=gcc -fdiagnostics-show-option -vectorize-loops -vectorize-slp -analyzer-output=html -analyzer-config stable-report-filename=true -o /tmp/scan-build-2018-12-27-042839-1215-1 -x c++ /build/llvm-toolchain-snapshot-8~svn350071/lib/MC/MCParser/DarwinAsmParser.cpp -faddrsig
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/// 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);
1
Calling 'DarwinAsmParser::parseVersionMin'
458 }
459
460 bool parseBuildVersion(StringRef Directive, SMLoc Loc);
461 bool parseVersionMin(StringRef Directive, SMLoc Loc, MCVersionMinType Type);
462 bool parseMajorMinorVersionComponent(unsigned *Major, unsigned *Minor,
463 const char *VersionName);
464 bool parseOptionalTrailingVersionComponent(unsigned *Component,
465 const char *ComponentName);
466 bool parseVersion(unsigned *Major, unsigned *Minor, unsigned *Update);
467 bool parseSDKVersion(VersionTuple &SDKVersion);
468 void checkVersion(StringRef Directive, StringRef Arg, SMLoc Loc,
469 Triple::OSType ExpectedOS);
470};
471
472} // end anonymous namespace
473
474bool DarwinAsmParser::parseSectionSwitch(StringRef Segment, StringRef Section,
475 unsigned TAA, unsigned Align,
476 unsigned StubSize) {
477 if (getLexer().isNot(AsmToken::EndOfStatement))
478 return TokError("unexpected token in section switching directive");
479 Lex();
480
481 // FIXME: Arch specific.
482 bool isText = TAA & MachO::S_ATTR_PURE_INSTRUCTIONS;
483 getStreamer().SwitchSection(getContext().getMachOSection(
484 Segment, Section, TAA, StubSize,
485 isText ? SectionKind::getText() : SectionKind::getData()));
486
487 // Set the implicit alignment, if any.
488 //
489 // FIXME: This isn't really what 'as' does; I think it just uses the implicit
490 // alignment on the section (e.g., if one manually inserts bytes into the
491 // section, then just issuing the section switch directive will not realign
492 // the section. However, this is arguably more reasonable behavior, and there
493 // is no good reason for someone to intentionally emit incorrectly sized
494 // values into the implicitly aligned sections.
495 if (Align)
496 getStreamer().EmitValueToAlignment(Align);
497
498 return false;
499}
500
501/// parseDirectiveAltEntry
502/// ::= .alt_entry identifier
503bool DarwinAsmParser::parseDirectiveAltEntry(StringRef, SMLoc) {
504 StringRef Name;
505 if (getParser().parseIdentifier(Name))
506 return TokError("expected identifier in directive");
507
508 // Look up symbol.
509 MCSymbol *Sym = getContext().getOrCreateSymbol(Name);
510
511 if (Sym->isDefined())
512 return TokError(".alt_entry must preceed symbol definition");
513
514 if (!getStreamer().EmitSymbolAttribute(Sym, MCSA_AltEntry))
515 return TokError("unable to emit symbol attribute");
516
517 Lex();
518 return false;
519}
520
521/// parseDirectiveDesc
522/// ::= .desc identifier , expression
523bool DarwinAsmParser::parseDirectiveDesc(StringRef, SMLoc) {
524 StringRef Name;
525 if (getParser().parseIdentifier(Name))
526 return TokError("expected identifier in directive");
527
528 // Handle the identifier as the key symbol.
529 MCSymbol *Sym = getContext().getOrCreateSymbol(Name);
530
531 if (getLexer().isNot(AsmToken::Comma))
532 return TokError("unexpected token in '.desc' directive");
533 Lex();
534
535 int64_t DescValue;
536 if (getParser().parseAbsoluteExpression(DescValue))
537 return true;
538
539 if (getLexer().isNot(AsmToken::EndOfStatement))
540 return TokError("unexpected token in '.desc' directive");
541
542 Lex();
543
544 // Set the n_desc field of this Symbol to this DescValue
545 getStreamer().EmitSymbolDesc(Sym, DescValue);
546
547 return false;
548}
549
550/// parseDirectiveIndirectSymbol
551/// ::= .indirect_symbol identifier
552bool DarwinAsmParser::parseDirectiveIndirectSymbol(StringRef, SMLoc Loc) {
553 const MCSectionMachO *Current = static_cast<const MCSectionMachO *>(
554 getStreamer().getCurrentSectionOnly());
555 MachO::SectionType SectionType = Current->getType();
556 if (SectionType != MachO::S_NON_LAZY_SYMBOL_POINTERS &&
557 SectionType != MachO::S_LAZY_SYMBOL_POINTERS &&
558 SectionType != MachO::S_THREAD_LOCAL_VARIABLE_POINTERS &&
559 SectionType != MachO::S_SYMBOL_STUBS)
560 return Error(Loc, "indirect symbol not in a symbol pointer or stub "
561 "section");
562
563 StringRef Name;
564 if (getParser().parseIdentifier(Name))
565 return TokError("expected identifier in .indirect_symbol directive");
566
567 MCSymbol *Sym = getContext().getOrCreateSymbol(Name);
568
569 // Assembler local symbols don't make any sense here. Complain loudly.
570 if (Sym->isTemporary())
571 return TokError("non-local symbol required in directive");
572
573 if (!getStreamer().EmitSymbolAttribute(Sym, MCSA_IndirectSymbol))
574 return TokError("unable to emit indirect symbol attribute for: " + Name);
575
576 if (getLexer().isNot(AsmToken::EndOfStatement))
577 return TokError("unexpected token in '.indirect_symbol' directive");
578
579 Lex();
580
581 return false;
582}
583
584/// parseDirectiveDumpOrLoad
585/// ::= ( .dump | .load ) "filename"
586bool DarwinAsmParser::parseDirectiveDumpOrLoad(StringRef Directive,
587 SMLoc IDLoc) {
588 bool IsDump = Directive == ".dump";
589 if (getLexer().isNot(AsmToken::String))
590 return TokError("expected string in '.dump' or '.load' directive");
591
592 Lex();
593
594 if (getLexer().isNot(AsmToken::EndOfStatement))
595 return TokError("unexpected token in '.dump' or '.load' directive");
596
597 Lex();
598
599 // FIXME: If/when .dump and .load are implemented they will be done in the
600 // the assembly parser and not have any need for an MCStreamer API.
601 if (IsDump)
602 return Warning(IDLoc, "ignoring directive .dump for now");
603 else
604 return Warning(IDLoc, "ignoring directive .load for now");
605}
606
607/// ParseDirectiveLinkerOption
608/// ::= .linker_option "string" ( , "string" )*
609bool DarwinAsmParser::parseDirectiveLinkerOption(StringRef IDVal, SMLoc) {
610 SmallVector<std::string, 4> Args;
611 while (true) {
612 if (getLexer().isNot(AsmToken::String))
613 return TokError("expected string in '" + Twine(IDVal) + "' directive");
614
615 std::string Data;
616 if (getParser().parseEscapedString(Data))
617 return true;
618
619 Args.push_back(Data);
620
621 if (getLexer().is(AsmToken::EndOfStatement))
622 break;
623
624 if (getLexer().isNot(AsmToken::Comma))
625 return TokError("unexpected token in '" + Twine(IDVal) + "' directive");
626 Lex();
627 }
628
629 getStreamer().EmitLinkerOptions(Args);
630 return false;
631}
632
633/// parseDirectiveLsym
634/// ::= .lsym identifier , expression
635bool DarwinAsmParser::parseDirectiveLsym(StringRef, SMLoc) {
636 StringRef Name;
637 if (getParser().parseIdentifier(Name))
638 return TokError("expected identifier in directive");
639
640 // Handle the identifier as the key symbol.
641 MCSymbol *Sym = getContext().getOrCreateSymbol(Name);
642
643 if (getLexer().isNot(AsmToken::Comma))
644 return TokError("unexpected token in '.lsym' directive");
645 Lex();
646
647 const MCExpr *Value;
648 if (getParser().parseExpression(Value))
649 return true;
650
651 if (getLexer().isNot(AsmToken::EndOfStatement))
652 return TokError("unexpected token in '.lsym' directive");
653
654 Lex();
655
656 // We don't currently support this directive.
657 //
658 // FIXME: Diagnostic location!
659 (void) Sym;
660 return TokError("directive '.lsym' is unsupported");
661}
662
663/// parseDirectiveSection:
664/// ::= .section identifier (',' identifier)*
665bool DarwinAsmParser::parseDirectiveSection(StringRef, SMLoc) {
666 SMLoc Loc = getLexer().getLoc();
667
668 StringRef SectionName;
669 if (getParser().parseIdentifier(SectionName))
670 return Error(Loc, "expected identifier after '.section' directive");
671
672 // Verify there is a following comma.
673 if (!getLexer().is(AsmToken::Comma))
674 return TokError("unexpected token in '.section' directive");
675
676 std::string SectionSpec = SectionName;
677 SectionSpec += ",";
678
679 // Add all the tokens until the end of the line, ParseSectionSpecifier will
680 // handle this.
681 StringRef EOL = getLexer().LexUntilEndOfStatement();
682 SectionSpec.append(EOL.begin(), EOL.end());
683
684 Lex();
685 if (getLexer().isNot(AsmToken::EndOfStatement))
686 return TokError("unexpected token in '.section' directive");
687 Lex();
688
689 StringRef Segment, Section;
690 unsigned StubSize;
691 unsigned TAA;
692 bool TAAParsed;
693 std::string ErrorStr =
694 MCSectionMachO::ParseSectionSpecifier(SectionSpec, Segment, Section,
695 TAA, TAAParsed, StubSize);
696
697 if (!ErrorStr.empty())
698 return Error(Loc, ErrorStr);
699
700 // Issue a warning if the target is not powerpc and Section is a *coal* section.
701 Triple TT = getParser().getContext().getObjectFileInfo()->getTargetTriple();
702 Triple::ArchType ArchTy = TT.getArch();
703
704 if (ArchTy != Triple::ppc && ArchTy != Triple::ppc64) {
705 StringRef NonCoalSection = StringSwitch<StringRef>(Section)
706 .Case("__textcoal_nt", "__text")
707 .Case("__const_coal", "__const")
708 .Case("__datacoal_nt", "__data")
709 .Default(Section);
710
711 if (!Section.equals(NonCoalSection)) {
712 StringRef SectionVal(Loc.getPointer());
713 size_t B = SectionVal.find(',') + 1, E = SectionVal.find(',', B);
714 SMLoc BLoc = SMLoc::getFromPointer(SectionVal.data() + B);
715 SMLoc ELoc = SMLoc::getFromPointer(SectionVal.data() + E);
716 getParser().Warning(Loc, "section \"" + Section + "\" is deprecated",
717 SMRange(BLoc, ELoc));
718 getParser().Note(Loc, "change section name to \"" + NonCoalSection +
719 "\"", SMRange(BLoc, ELoc));
720 }
721 }
722
723 // FIXME: Arch specific.
724 bool isText = Segment == "__TEXT"; // FIXME: Hack.
725 getStreamer().SwitchSection(getContext().getMachOSection(
726 Segment, Section, TAA, StubSize,
727 isText ? SectionKind::getText() : SectionKind::getData()));
728 return false;
729}
730
731/// ParseDirectivePushSection:
732/// ::= .pushsection identifier (',' identifier)*
733bool DarwinAsmParser::parseDirectivePushSection(StringRef S, SMLoc Loc) {
734 getStreamer().PushSection();
735
736 if (parseDirectiveSection(S, Loc)) {
737 getStreamer().PopSection();
738 return true;
739 }
740
741 return false;
742}
743
744/// ParseDirectivePopSection:
745/// ::= .popsection
746bool DarwinAsmParser::parseDirectivePopSection(StringRef, SMLoc) {
747 if (!getStreamer().PopSection())
748 return TokError(".popsection without corresponding .pushsection");
749 return false;
750}
751
752/// ParseDirectivePrevious:
753/// ::= .previous
754bool DarwinAsmParser::parseDirectivePrevious(StringRef DirName, SMLoc) {
755 MCSectionSubPair PreviousSection = getStreamer().getPreviousSection();
756 if (!PreviousSection.first)
757 return TokError(".previous without corresponding .section");
758 getStreamer().SwitchSection(PreviousSection.first, PreviousSection.second);
759 return false;
760}
761
762/// ParseDirectiveSecureLogUnique
763/// ::= .secure_log_unique ... message ...
764bool DarwinAsmParser::parseDirectiveSecureLogUnique(StringRef, SMLoc IDLoc) {
765 StringRef LogMessage = getParser().parseStringToEndOfStatement();
766 if (getLexer().isNot(AsmToken::EndOfStatement))
767 return TokError("unexpected token in '.secure_log_unique' directive");
768
769 if (getContext().getSecureLogUsed())
770 return Error(IDLoc, ".secure_log_unique specified multiple times");
771
772 // Get the secure log path.
773 const char *SecureLogFile = getContext().getSecureLogFile();
774 if (!SecureLogFile)
775 return Error(IDLoc, ".secure_log_unique used but AS_SECURE_LOG_FILE "
776 "environment variable unset.");
777
778 // Open the secure log file if we haven't already.
779 raw_fd_ostream *OS = getContext().getSecureLog();
780 if (!OS) {
781 std::error_code EC;
782 auto NewOS = llvm::make_unique<raw_fd_ostream>(
783 StringRef(SecureLogFile), EC, sys::fs::F_Append | sys::fs::F_Text);
784 if (EC)
785 return Error(IDLoc, Twine("can't open secure log file: ") +
786 SecureLogFile + " (" + EC.message() + ")");
787 OS = NewOS.get();
788 getContext().setSecureLog(std::move(NewOS));
789 }
790
791 // Write the message.
792 unsigned CurBuf = getSourceManager().FindBufferContainingLoc(IDLoc);
793 *OS << getSourceManager().getBufferInfo(CurBuf).Buffer->getBufferIdentifier()
794 << ":" << getSourceManager().FindLineNumber(IDLoc, CurBuf) << ":"
795 << LogMessage + "\n";
796
797 getContext().setSecureLogUsed(true);
798
799 return false;
800}
801
802/// ParseDirectiveSecureLogReset
803/// ::= .secure_log_reset
804bool DarwinAsmParser::parseDirectiveSecureLogReset(StringRef, SMLoc IDLoc) {
805 if (getLexer().isNot(AsmToken::EndOfStatement))
806 return TokError("unexpected token in '.secure_log_reset' directive");
807
808 Lex();
809
810 getContext().setSecureLogUsed(false);
811
812 return false;
813}
814
815/// parseDirectiveSubsectionsViaSymbols
816/// ::= .subsections_via_symbols
817bool DarwinAsmParser::parseDirectiveSubsectionsViaSymbols(StringRef, SMLoc) {
818 if (getLexer().isNot(AsmToken::EndOfStatement))
819 return TokError("unexpected token in '.subsections_via_symbols' directive");
820
821 Lex();
822
823 getStreamer().EmitAssemblerFlag(MCAF_SubsectionsViaSymbols);
824
825 return false;
826}
827
828/// ParseDirectiveTBSS
829/// ::= .tbss identifier, size, align
830bool DarwinAsmParser::parseDirectiveTBSS(StringRef, SMLoc) {
831 SMLoc IDLoc = getLexer().getLoc();
832 StringRef Name;
833 if (getParser().parseIdentifier(Name))
834 return TokError("expected identifier in directive");
835
836 // Handle the identifier as the key symbol.
837 MCSymbol *Sym = getContext().getOrCreateSymbol(Name);
838
839 if (getLexer().isNot(AsmToken::Comma))
840 return TokError("unexpected token in directive");
841 Lex();
842
843 int64_t Size;
844 SMLoc SizeLoc = getLexer().getLoc();
845 if (getParser().parseAbsoluteExpression(Size))
846 return true;
847
848 int64_t Pow2Alignment = 0;
849 SMLoc Pow2AlignmentLoc;
850 if (getLexer().is(AsmToken::Comma)) {
851 Lex();
852 Pow2AlignmentLoc = getLexer().getLoc();
853 if (getParser().parseAbsoluteExpression(Pow2Alignment))
854 return true;
855 }
856
857 if (getLexer().isNot(AsmToken::EndOfStatement))
858 return TokError("unexpected token in '.tbss' directive");
859
860 Lex();
861
862 if (Size < 0)
863 return Error(SizeLoc, "invalid '.tbss' directive size, can't be less than"
864 "zero");
865
866 // FIXME: Diagnose overflow.
867 if (Pow2Alignment < 0)
868 return Error(Pow2AlignmentLoc, "invalid '.tbss' alignment, can't be less"
869 "than zero");
870
871 if (!Sym->isUndefined())
872 return Error(IDLoc, "invalid symbol redefinition");
873
874 getStreamer().EmitTBSSSymbol(getContext().getMachOSection(
875 "__DATA", "__thread_bss",
876 MachO::S_THREAD_LOCAL_ZEROFILL,
877 0, SectionKind::getThreadBSS()),
878 Sym, Size, 1 << Pow2Alignment);
879
880 return false;
881}
882
883/// ParseDirectiveZerofill
884/// ::= .zerofill segname , sectname [, identifier , size_expression [
885/// , align_expression ]]
886bool DarwinAsmParser::parseDirectiveZerofill(StringRef, SMLoc) {
887 StringRef Segment;
888 if (getParser().parseIdentifier(Segment))
889 return TokError("expected segment name after '.zerofill' directive");
890
891 if (getLexer().isNot(AsmToken::Comma))
892 return TokError("unexpected token in directive");
893 Lex();
894
895 StringRef Section;
896 SMLoc SectionLoc = getLexer().getLoc();
897 if (getParser().parseIdentifier(Section))
898 return TokError("expected section name after comma in '.zerofill' "
899 "directive");
900
901 // If this is the end of the line all that was wanted was to create the
902 // the section but with no symbol.
903 if (getLexer().is(AsmToken::EndOfStatement)) {
904 // Create the zerofill section but no symbol
905 getStreamer().EmitZerofill(
906 getContext().getMachOSection(Segment, Section, MachO::S_ZEROFILL, 0,
907 SectionKind::getBSS()),
908 /*Symbol=*/nullptr, /*Size=*/0, /*ByteAlignment=*/0, SectionLoc);
909 return false;
910 }
911
912 if (getLexer().isNot(AsmToken::Comma))
913 return TokError("unexpected token in directive");
914 Lex();
915
916 SMLoc IDLoc = getLexer().getLoc();
917 StringRef IDStr;
918 if (getParser().parseIdentifier(IDStr))
919 return TokError("expected identifier in directive");
920
921 // handle the identifier as the key symbol.
922 MCSymbol *Sym = getContext().getOrCreateSymbol(IDStr);
923
924 if (getLexer().isNot(AsmToken::Comma))
925 return TokError("unexpected token in directive");
926 Lex();
927
928 int64_t Size;
929 SMLoc SizeLoc = getLexer().getLoc();
930 if (getParser().parseAbsoluteExpression(Size))
931 return true;
932
933 int64_t Pow2Alignment = 0;
934 SMLoc Pow2AlignmentLoc;
935 if (getLexer().is(AsmToken::Comma)) {
936 Lex();
937 Pow2AlignmentLoc = getLexer().getLoc();
938 if (getParser().parseAbsoluteExpression(Pow2Alignment))
939 return true;
940 }
941
942 if (getLexer().isNot(AsmToken::EndOfStatement))
943 return TokError("unexpected token in '.zerofill' directive");
944
945 Lex();
946
947 if (Size < 0)
948 return Error(SizeLoc, "invalid '.zerofill' directive size, can't be less "
949 "than zero");
950
951 // NOTE: The alignment in the directive is a power of 2 value, the assembler
952 // may internally end up wanting an alignment in bytes.
953 // FIXME: Diagnose overflow.
954 if (Pow2Alignment < 0)
955 return Error(Pow2AlignmentLoc, "invalid '.zerofill' directive alignment, "
956 "can't be less than zero");
957
958 if (!Sym->isUndefined())
959 return Error(IDLoc, "invalid symbol redefinition");
960
961 // Create the zerofill Symbol with Size and Pow2Alignment
962 //
963 // FIXME: Arch specific.
964 getStreamer().EmitZerofill(getContext().getMachOSection(
965 Segment, Section, MachO::S_ZEROFILL,
966 0, SectionKind::getBSS()),
967 Sym, Size, 1 << Pow2Alignment, SectionLoc);
968
969 return false;
970}
971
972/// ParseDirectiveDataRegion
973/// ::= .data_region [ ( jt8 | jt16 | jt32 ) ]
974bool DarwinAsmParser::parseDirectiveDataRegion(StringRef, SMLoc) {
975 if (getLexer().is(AsmToken::EndOfStatement)) {
976 Lex();
977 getStreamer().EmitDataRegion(MCDR_DataRegion);
978 return false;
979 }
980 StringRef RegionType;
981 SMLoc Loc = getParser().getTok().getLoc();
982 if (getParser().parseIdentifier(RegionType))
983 return TokError("expected region type after '.data_region' directive");
984 int Kind = StringSwitch<int>(RegionType)
985 .Case("jt8", MCDR_DataRegionJT8)
986 .Case("jt16", MCDR_DataRegionJT16)
987 .Case("jt32", MCDR_DataRegionJT32)
988 .Default(-1);
989 if (Kind == -1)
990 return Error(Loc, "unknown region type in '.data_region' directive");
991 Lex();
992
993 getStreamer().EmitDataRegion((MCDataRegionType)Kind);
994 return false;
995}
996
997/// ParseDirectiveDataRegionEnd
998/// ::= .end_data_region
999bool DarwinAsmParser::parseDirectiveDataRegionEnd(StringRef, SMLoc) {
1000 if (getLexer().isNot(AsmToken::EndOfStatement))
1001 return TokError("unexpected token in '.end_data_region' directive");
1002
1003 Lex();
1004 getStreamer().EmitDataRegion(MCDR_DataRegionEnd);
1005 return false;
1006}
1007
1008static bool isSDKVersionToken(const AsmToken &Tok) {
1009 return Tok.is(AsmToken::Identifier) && Tok.getIdentifier() == "sdk_version";
1010}
1011
1012/// parseMajorMinorVersionComponent ::= major, minor
1013bool DarwinAsmParser::parseMajorMinorVersionComponent(unsigned *Major,
1014 unsigned *Minor,
1015 const char *VersionName) {
1016 // Get the major version number.
1017 if (getLexer().isNot(AsmToken::Integer))
9
Taking true branch
1018 return TokError(Twine("invalid ") + VersionName +
10
Returning without writing to '*Major'
1019 " major version number, integer expected");
1020 int64_t MajorVal = getLexer().getTok().getIntVal();
1021 if (MajorVal > 65535 || MajorVal <= 0)
1022 return TokError(Twine("invalid ") + VersionName + " major version number");
1023 *Major = (unsigned)MajorVal;
1024 Lex();
1025 if (getLexer().isNot(AsmToken::Comma))
1026 return TokError(Twine(VersionName) +
1027 " minor version number required, comma expected");
1028 Lex();
1029 // Get the minor version number.
1030 if (getLexer().isNot(AsmToken::Integer))
1031 return TokError(Twine("invalid ") + VersionName +
1032 " minor version number, integer expected");
1033 int64_t MinorVal = getLexer().getTok().getIntVal();
1034 if (MinorVal > 255 || MinorVal < 0)
1035 return TokError(Twine("invalid ") + VersionName + " minor version number");
1036 *Minor = MinorVal;
1037 Lex();
1038 return false;
1039}
1040
1041/// parseOptionalTrailingVersionComponent ::= , version_number
1042bool DarwinAsmParser::parseOptionalTrailingVersionComponent(
1043 unsigned *Component, const char *ComponentName) {
1044 assert(getLexer().is(AsmToken::Comma) && "comma expected")((getLexer().is(AsmToken::Comma) && "comma expected")
? static_cast<void> (0) : __assert_fail ("getLexer().is(AsmToken::Comma) && \"comma expected\""
, "/build/llvm-toolchain-snapshot-8~svn350071/lib/MC/MCParser/DarwinAsmParser.cpp"
, 1044, __PRETTY_FUNCTION__))
;
1045 Lex();
1046 if (getLexer().isNot(AsmToken::Integer))
1047 return TokError(Twine("invalid ") + ComponentName +
1048 " version number, integer expected");
1049 int64_t Val = getLexer().getTok().getIntVal();
1050 if (Val > 255 || Val < 0)
1051 return TokError(Twine("invalid ") + ComponentName + " version number");
1052 *Component = Val;
1053 Lex();
1054 return false;
1055}
1056
1057/// parseVersion ::= parseMajorMinorVersionComponent
1058/// parseOptionalTrailingVersionComponent
1059bool DarwinAsmParser::parseVersion(unsigned *Major, unsigned *Minor,
1060 unsigned *Update) {
1061 if (parseMajorMinorVersionComponent(Major, Minor, "OS"))
1062 return true;
1063
1064 // Get the update level, if specified
1065 *Update = 0;
1066 if (getLexer().is(AsmToken::EndOfStatement) ||
1067 isSDKVersionToken(getLexer().getTok()))
1068 return false;
1069 if (getLexer().isNot(AsmToken::Comma))
1070 return TokError("invalid OS update specifier, comma expected");
1071 if (parseOptionalTrailingVersionComponent(Update, "OS update"))
1072 return true;
1073 return false;
1074}
1075
1076bool DarwinAsmParser::parseSDKVersion(VersionTuple &SDKVersion) {
1077 assert(isSDKVersionToken(getLexer().getTok()) && "expected sdk_version")((isSDKVersionToken(getLexer().getTok()) && "expected sdk_version"
) ? static_cast<void> (0) : __assert_fail ("isSDKVersionToken(getLexer().getTok()) && \"expected sdk_version\""
, "/build/llvm-toolchain-snapshot-8~svn350071/lib/MC/MCParser/DarwinAsmParser.cpp"
, 1077, __PRETTY_FUNCTION__))
;
5
Assuming the condition is true
6
'?' condition is true
1078 Lex();
1079 unsigned Major, Minor;
7
'Major' declared without an initial value
1080 if (parseMajorMinorVersionComponent(&Major, &Minor, "SDK"))
8
Calling 'DarwinAsmParser::parseMajorMinorVersionComponent'
11
Returning from 'DarwinAsmParser::parseMajorMinorVersionComponent'
12
Assuming the condition is false
13
Taking false branch
1081 return true;
1082 SDKVersion = VersionTuple(Major, Minor);
14
1st function call argument is an uninitialized value
1083
1084 // Get the subminor version, if specified.
1085 if (getLexer().is(AsmToken::Comma)) {
1086 unsigned Subminor;
1087 if (parseOptionalTrailingVersionComponent(&Subminor, "SDK subminor"))
1088 return true;
1089 SDKVersion = VersionTuple(Major, Minor, Subminor);
1090 }
1091 return false;
1092}
1093
1094void DarwinAsmParser::checkVersion(StringRef Directive, StringRef Arg,
1095 SMLoc Loc, Triple::OSType ExpectedOS) {
1096 const Triple &Target = getContext().getObjectFileInfo()->getTargetTriple();
1097 if (Target.getOS() != ExpectedOS)
1098 Warning(Loc, Twine(Directive) +
1099 (Arg.empty() ? Twine() : Twine(' ') + Arg) +
1100 " used while targeting " + Target.getOSName());
1101
1102 if (LastVersionDirective.isValid()) {
1103 Warning(Loc, "overriding previous version directive");
1104 Note(LastVersionDirective, "previous definition is here");
1105 }
1106 LastVersionDirective = Loc;
1107}
1108
1109static Triple::OSType getOSTypeFromMCVM(MCVersionMinType Type) {
1110 switch (Type) {
1111 case MCVM_WatchOSVersionMin: return Triple::WatchOS;
1112 case MCVM_TvOSVersionMin: return Triple::TvOS;
1113 case MCVM_IOSVersionMin: return Triple::IOS;
1114 case MCVM_OSXVersionMin: return Triple::MacOSX;
1115 }
1116 llvm_unreachable("Invalid mc version min type")::llvm::llvm_unreachable_internal("Invalid mc version min type"
, "/build/llvm-toolchain-snapshot-8~svn350071/lib/MC/MCParser/DarwinAsmParser.cpp"
, 1116)
;
1117}
1118
1119/// parseVersionMin
1120/// ::= .ios_version_min parseVersion parseSDKVersion
1121/// | .macosx_version_min parseVersion parseSDKVersion
1122/// | .tvos_version_min parseVersion parseSDKVersion
1123/// | .watchos_version_min parseVersion parseSDKVersion
1124bool DarwinAsmParser::parseVersionMin(StringRef Directive, SMLoc Loc,
1125 MCVersionMinType Type) {
1126 unsigned Major;
1127 unsigned Minor;
1128 unsigned Update;
1129 if (parseVersion(&Major, &Minor, &Update))
2
Taking false branch
1130 return true;
1131
1132 VersionTuple SDKVersion;
1133 if (isSDKVersionToken(getLexer().getTok()) && parseSDKVersion(SDKVersion))
3
Assuming the condition is true
4
Calling 'DarwinAsmParser::parseSDKVersion'
1134 return true;
1135
1136 if (parseToken(AsmToken::EndOfStatement))
1137 return addErrorSuffix(Twine(" in '") + Directive + "' directive");
1138
1139 Triple::OSType ExpectedOS = getOSTypeFromMCVM(Type);
1140 checkVersion(Directive, StringRef(), Loc, ExpectedOS);
1141 getStreamer().EmitVersionMin(Type, Major, Minor, Update, SDKVersion);
1142 return false;
1143}
1144
1145static Triple::OSType getOSTypeFromPlatform(MachO::PlatformType Type) {
1146 switch (Type) {
1147 case MachO::PLATFORM_MACOS: return Triple::MacOSX;
1148 case MachO::PLATFORM_IOS: return Triple::IOS;
1149 case MachO::PLATFORM_TVOS: return Triple::TvOS;
1150 case MachO::PLATFORM_WATCHOS: return Triple::WatchOS;
1151 case MachO::PLATFORM_BRIDGEOS: /* silence warning */ break;
1152 case MachO::PLATFORM_IOSSIMULATOR: /* silence warning */ break;
1153 case MachO::PLATFORM_TVOSSIMULATOR: /* silence warning */ break;
1154 case MachO::PLATFORM_WATCHOSSIMULATOR: /* silence warning */ break;
1155 }
1156 llvm_unreachable("Invalid mach-o platform type")::llvm::llvm_unreachable_internal("Invalid mach-o platform type"
, "/build/llvm-toolchain-snapshot-8~svn350071/lib/MC/MCParser/DarwinAsmParser.cpp"
, 1156)
;
1157}
1158
1159/// parseBuildVersion
1160/// ::= .build_version (macos|ios|tvos|watchos), parseVersion parseSDKVersion
1161bool DarwinAsmParser::parseBuildVersion(StringRef Directive, SMLoc Loc) {
1162 StringRef PlatformName;
1163 SMLoc PlatformLoc = getTok().getLoc();
1164 if (getParser().parseIdentifier(PlatformName))
1165 return TokError("platform name expected");
1166
1167 unsigned Platform = StringSwitch<unsigned>(PlatformName)
1168 .Case("macos", MachO::PLATFORM_MACOS)
1169 .Case("ios", MachO::PLATFORM_IOS)
1170 .Case("tvos", MachO::PLATFORM_TVOS)
1171 .Case("watchos", MachO::PLATFORM_WATCHOS)
1172 .Default(0);
1173 if (Platform == 0)
1174 return Error(PlatformLoc, "unknown platform name");
1175
1176 if (getLexer().isNot(AsmToken::Comma))
1177 return TokError("version number required, comma expected");
1178 Lex();
1179
1180 unsigned Major;
1181 unsigned Minor;
1182 unsigned Update;
1183 if (parseVersion(&Major, &Minor, &Update))
1184 return true;
1185
1186 VersionTuple SDKVersion;
1187 if (isSDKVersionToken(getLexer().getTok()) && parseSDKVersion(SDKVersion))
1188 return true;
1189
1190 if (parseToken(AsmToken::EndOfStatement))
1191 return addErrorSuffix(" in '.build_version' directive");
1192
1193 Triple::OSType ExpectedOS
1194 = getOSTypeFromPlatform((MachO::PlatformType)Platform);
1195 checkVersion(Directive, PlatformName, Loc, ExpectedOS);
1196 getStreamer().EmitBuildVersion(Platform, Major, Minor, Update, SDKVersion);
1197 return false;
1198}
1199
1200
1201namespace llvm {
1202
1203MCAsmParserExtension *createDarwinAsmParser() {
1204 return new DarwinAsmParser;
1205}
1206
1207} // end llvm namespace