File: | build/llvm-toolchain-snapshot-15~++20220420111733+e13d2efed663/clang/lib/Lex/Pragma.cpp |
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1 | //===- Pragma.cpp - Pragma registration and handling ----------------------===// | |||
2 | // | |||
3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. | |||
4 | // See https://llvm.org/LICENSE.txt for license information. | |||
5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception | |||
6 | // | |||
7 | //===----------------------------------------------------------------------===// | |||
8 | // | |||
9 | // This file implements the PragmaHandler/PragmaTable interfaces and implements | |||
10 | // pragma related methods of the Preprocessor class. | |||
11 | // | |||
12 | //===----------------------------------------------------------------------===// | |||
13 | ||||
14 | #include "clang/Lex/Pragma.h" | |||
15 | #include "clang/Basic/CLWarnings.h" | |||
16 | #include "clang/Basic/Diagnostic.h" | |||
17 | #include "clang/Basic/DiagnosticLex.h" | |||
18 | #include "clang/Basic/FileManager.h" | |||
19 | #include "clang/Basic/IdentifierTable.h" | |||
20 | #include "clang/Basic/LLVM.h" | |||
21 | #include "clang/Basic/LangOptions.h" | |||
22 | #include "clang/Basic/Module.h" | |||
23 | #include "clang/Basic/SourceLocation.h" | |||
24 | #include "clang/Basic/SourceManager.h" | |||
25 | #include "clang/Basic/TokenKinds.h" | |||
26 | #include "clang/Lex/HeaderSearch.h" | |||
27 | #include "clang/Lex/LexDiagnostic.h" | |||
28 | #include "clang/Lex/Lexer.h" | |||
29 | #include "clang/Lex/LiteralSupport.h" | |||
30 | #include "clang/Lex/MacroInfo.h" | |||
31 | #include "clang/Lex/ModuleLoader.h" | |||
32 | #include "clang/Lex/PPCallbacks.h" | |||
33 | #include "clang/Lex/Preprocessor.h" | |||
34 | #include "clang/Lex/PreprocessorLexer.h" | |||
35 | #include "clang/Lex/PreprocessorOptions.h" | |||
36 | #include "clang/Lex/Token.h" | |||
37 | #include "clang/Lex/TokenLexer.h" | |||
38 | #include "llvm/ADT/ArrayRef.h" | |||
39 | #include "llvm/ADT/DenseMap.h" | |||
40 | #include "llvm/ADT/Optional.h" | |||
41 | #include "llvm/ADT/STLExtras.h" | |||
42 | #include "llvm/ADT/SmallString.h" | |||
43 | #include "llvm/ADT/SmallVector.h" | |||
44 | #include "llvm/ADT/StringRef.h" | |||
45 | #include "llvm/ADT/StringSwitch.h" | |||
46 | #include "llvm/Support/Compiler.h" | |||
47 | #include "llvm/Support/ErrorHandling.h" | |||
48 | #include "llvm/Support/Timer.h" | |||
49 | #include <algorithm> | |||
50 | #include <cassert> | |||
51 | #include <cstddef> | |||
52 | #include <cstdint> | |||
53 | #include <limits> | |||
54 | #include <string> | |||
55 | #include <utility> | |||
56 | #include <vector> | |||
57 | ||||
58 | using namespace clang; | |||
59 | ||||
60 | // Out-of-line destructor to provide a home for the class. | |||
61 | PragmaHandler::~PragmaHandler() = default; | |||
62 | ||||
63 | //===----------------------------------------------------------------------===// | |||
64 | // EmptyPragmaHandler Implementation. | |||
65 | //===----------------------------------------------------------------------===// | |||
66 | ||||
67 | EmptyPragmaHandler::EmptyPragmaHandler(StringRef Name) : PragmaHandler(Name) {} | |||
68 | ||||
69 | void EmptyPragmaHandler::HandlePragma(Preprocessor &PP, | |||
70 | PragmaIntroducer Introducer, | |||
71 | Token &FirstToken) {} | |||
72 | ||||
73 | //===----------------------------------------------------------------------===// | |||
74 | // PragmaNamespace Implementation. | |||
75 | //===----------------------------------------------------------------------===// | |||
76 | ||||
77 | /// FindHandler - Check to see if there is already a handler for the | |||
78 | /// specified name. If not, return the handler for the null identifier if it | |||
79 | /// exists, otherwise return null. If IgnoreNull is true (the default) then | |||
80 | /// the null handler isn't returned on failure to match. | |||
81 | PragmaHandler *PragmaNamespace::FindHandler(StringRef Name, | |||
82 | bool IgnoreNull) const { | |||
83 | auto I = Handlers.find(Name); | |||
84 | if (I != Handlers.end()) | |||
85 | return I->getValue().get(); | |||
86 | if (IgnoreNull) | |||
87 | return nullptr; | |||
88 | I = Handlers.find(StringRef()); | |||
89 | if (I != Handlers.end()) | |||
90 | return I->getValue().get(); | |||
91 | return nullptr; | |||
92 | } | |||
93 | ||||
94 | void PragmaNamespace::AddPragma(PragmaHandler *Handler) { | |||
95 | assert(!Handlers.count(Handler->getName()) &&(static_cast <bool> (!Handlers.count(Handler->getName ()) && "A handler with this name is already registered in this namespace" ) ? void (0) : __assert_fail ("!Handlers.count(Handler->getName()) && \"A handler with this name is already registered in this namespace\"" , "clang/lib/Lex/Pragma.cpp", 96, __extension__ __PRETTY_FUNCTION__ )) | |||
96 | "A handler with this name is already registered in this namespace")(static_cast <bool> (!Handlers.count(Handler->getName ()) && "A handler with this name is already registered in this namespace" ) ? void (0) : __assert_fail ("!Handlers.count(Handler->getName()) && \"A handler with this name is already registered in this namespace\"" , "clang/lib/Lex/Pragma.cpp", 96, __extension__ __PRETTY_FUNCTION__ )); | |||
97 | Handlers[Handler->getName()].reset(Handler); | |||
98 | } | |||
99 | ||||
100 | void PragmaNamespace::RemovePragmaHandler(PragmaHandler *Handler) { | |||
101 | auto I = Handlers.find(Handler->getName()); | |||
102 | assert(I != Handlers.end() &&(static_cast <bool> (I != Handlers.end() && "Handler not registered in this namespace" ) ? void (0) : __assert_fail ("I != Handlers.end() && \"Handler not registered in this namespace\"" , "clang/lib/Lex/Pragma.cpp", 103, __extension__ __PRETTY_FUNCTION__ )) | |||
103 | "Handler not registered in this namespace")(static_cast <bool> (I != Handlers.end() && "Handler not registered in this namespace" ) ? void (0) : __assert_fail ("I != Handlers.end() && \"Handler not registered in this namespace\"" , "clang/lib/Lex/Pragma.cpp", 103, __extension__ __PRETTY_FUNCTION__ )); | |||
104 | // Release ownership back to the caller. | |||
105 | I->getValue().release(); | |||
106 | Handlers.erase(I); | |||
107 | } | |||
108 | ||||
109 | void PragmaNamespace::HandlePragma(Preprocessor &PP, | |||
110 | PragmaIntroducer Introducer, Token &Tok) { | |||
111 | // Read the 'namespace' that the directive is in, e.g. STDC. Do not macro | |||
112 | // expand it, the user can have a STDC #define, that should not affect this. | |||
113 | PP.LexUnexpandedToken(Tok); | |||
114 | ||||
115 | // Get the handler for this token. If there is no handler, ignore the pragma. | |||
116 | PragmaHandler *Handler | |||
117 | = FindHandler(Tok.getIdentifierInfo() ? Tok.getIdentifierInfo()->getName() | |||
118 | : StringRef(), | |||
119 | /*IgnoreNull=*/false); | |||
120 | if (!Handler) { | |||
121 | PP.Diag(Tok, diag::warn_pragma_ignored); | |||
122 | return; | |||
123 | } | |||
124 | ||||
125 | // Otherwise, pass it down. | |||
126 | Handler->HandlePragma(PP, Introducer, Tok); | |||
127 | } | |||
128 | ||||
129 | //===----------------------------------------------------------------------===// | |||
130 | // Preprocessor Pragma Directive Handling. | |||
131 | //===----------------------------------------------------------------------===// | |||
132 | ||||
133 | namespace { | |||
134 | // TokenCollector provides the option to collect tokens that were "read" | |||
135 | // and return them to the stream to be read later. | |||
136 | // Currently used when reading _Pragma/__pragma directives. | |||
137 | struct TokenCollector { | |||
138 | Preprocessor &Self; | |||
139 | bool Collect; | |||
140 | SmallVector<Token, 3> Tokens; | |||
141 | Token &Tok; | |||
142 | ||||
143 | void lex() { | |||
144 | if (Collect) | |||
145 | Tokens.push_back(Tok); | |||
146 | Self.Lex(Tok); | |||
147 | } | |||
148 | ||||
149 | void revert() { | |||
150 | assert(Collect && "did not collect tokens")(static_cast <bool> (Collect && "did not collect tokens" ) ? void (0) : __assert_fail ("Collect && \"did not collect tokens\"" , "clang/lib/Lex/Pragma.cpp", 150, __extension__ __PRETTY_FUNCTION__ )); | |||
151 | assert(!Tokens.empty() && "collected unexpected number of tokens")(static_cast <bool> (!Tokens.empty() && "collected unexpected number of tokens" ) ? void (0) : __assert_fail ("!Tokens.empty() && \"collected unexpected number of tokens\"" , "clang/lib/Lex/Pragma.cpp", 151, __extension__ __PRETTY_FUNCTION__ )); | |||
152 | ||||
153 | // Push the ( "string" ) tokens into the token stream. | |||
154 | auto Toks = std::make_unique<Token[]>(Tokens.size()); | |||
155 | std::copy(Tokens.begin() + 1, Tokens.end(), Toks.get()); | |||
156 | Toks[Tokens.size() - 1] = Tok; | |||
157 | Self.EnterTokenStream(std::move(Toks), Tokens.size(), | |||
158 | /*DisableMacroExpansion*/ true, | |||
159 | /*IsReinject*/ true); | |||
160 | ||||
161 | // ... and return the pragma token unchanged. | |||
162 | Tok = *Tokens.begin(); | |||
163 | } | |||
164 | }; | |||
165 | } // namespace | |||
166 | ||||
167 | /// HandlePragmaDirective - The "\#pragma" directive has been parsed. Lex the | |||
168 | /// rest of the pragma, passing it to the registered pragma handlers. | |||
169 | void Preprocessor::HandlePragmaDirective(PragmaIntroducer Introducer) { | |||
170 | if (Callbacks) | |||
171 | Callbacks->PragmaDirective(Introducer.Loc, Introducer.Kind); | |||
172 | ||||
173 | if (!PragmasEnabled) | |||
174 | return; | |||
175 | ||||
176 | ++NumPragma; | |||
177 | ||||
178 | // Invoke the first level of pragma handlers which reads the namespace id. | |||
179 | Token Tok; | |||
180 | PragmaHandlers->HandlePragma(*this, Introducer, Tok); | |||
181 | ||||
182 | // If the pragma handler didn't read the rest of the line, consume it now. | |||
183 | if ((CurTokenLexer && CurTokenLexer->isParsingPreprocessorDirective()) | |||
184 | || (CurPPLexer && CurPPLexer->ParsingPreprocessorDirective)) | |||
185 | DiscardUntilEndOfDirective(); | |||
186 | } | |||
187 | ||||
188 | /// Handle_Pragma - Read a _Pragma directive, slice it up, process it, then | |||
189 | /// return the first token after the directive. The _Pragma token has just | |||
190 | /// been read into 'Tok'. | |||
191 | void Preprocessor::Handle_Pragma(Token &Tok) { | |||
192 | // C11 6.10.3.4/3: | |||
193 | // all pragma unary operator expressions within [a completely | |||
194 | // macro-replaced preprocessing token sequence] are [...] processed [after | |||
195 | // rescanning is complete] | |||
196 | // | |||
197 | // This means that we execute _Pragma operators in two cases: | |||
198 | // | |||
199 | // 1) on token sequences that would otherwise be produced as the output of | |||
200 | // phase 4 of preprocessing, and | |||
201 | // 2) on token sequences formed as the macro-replaced token sequence of a | |||
202 | // macro argument | |||
203 | // | |||
204 | // Case #2 appears to be a wording bug: only _Pragmas that would survive to | |||
205 | // the end of phase 4 should actually be executed. Discussion on the WG14 | |||
206 | // mailing list suggests that a _Pragma operator is notionally checked early, | |||
207 | // but only pragmas that survive to the end of phase 4 should be executed. | |||
208 | // | |||
209 | // In Case #2, we check the syntax now, but then put the tokens back into the | |||
210 | // token stream for later consumption. | |||
211 | ||||
212 | TokenCollector Toks = {*this, InMacroArgPreExpansion, {}, Tok}; | |||
213 | ||||
214 | // Remember the pragma token location. | |||
215 | SourceLocation PragmaLoc = Tok.getLocation(); | |||
216 | ||||
217 | // Read the '('. | |||
218 | Toks.lex(); | |||
219 | if (Tok.isNot(tok::l_paren)) { | |||
220 | Diag(PragmaLoc, diag::err__Pragma_malformed); | |||
221 | return; | |||
222 | } | |||
223 | ||||
224 | // Read the '"..."'. | |||
225 | Toks.lex(); | |||
226 | if (!tok::isStringLiteral(Tok.getKind())) { | |||
227 | Diag(PragmaLoc, diag::err__Pragma_malformed); | |||
228 | // Skip bad tokens, and the ')', if present. | |||
229 | if (Tok.isNot(tok::r_paren) && Tok.isNot(tok::eof)) | |||
230 | Lex(Tok); | |||
231 | while (Tok.isNot(tok::r_paren) && | |||
232 | !Tok.isAtStartOfLine() && | |||
233 | Tok.isNot(tok::eof)) | |||
234 | Lex(Tok); | |||
235 | if (Tok.is(tok::r_paren)) | |||
236 | Lex(Tok); | |||
237 | return; | |||
238 | } | |||
239 | ||||
240 | if (Tok.hasUDSuffix()) { | |||
241 | Diag(Tok, diag::err_invalid_string_udl); | |||
242 | // Skip this token, and the ')', if present. | |||
243 | Lex(Tok); | |||
244 | if (Tok.is(tok::r_paren)) | |||
245 | Lex(Tok); | |||
246 | return; | |||
247 | } | |||
248 | ||||
249 | // Remember the string. | |||
250 | Token StrTok = Tok; | |||
251 | ||||
252 | // Read the ')'. | |||
253 | Toks.lex(); | |||
254 | if (Tok.isNot(tok::r_paren)) { | |||
255 | Diag(PragmaLoc, diag::err__Pragma_malformed); | |||
256 | return; | |||
257 | } | |||
258 | ||||
259 | // If we're expanding a macro argument, put the tokens back. | |||
260 | if (InMacroArgPreExpansion) { | |||
261 | Toks.revert(); | |||
262 | return; | |||
263 | } | |||
264 | ||||
265 | SourceLocation RParenLoc = Tok.getLocation(); | |||
266 | bool Invalid = false; | |||
267 | std::string StrVal = getSpelling(StrTok, &Invalid); | |||
268 | if (Invalid) { | |||
269 | Diag(PragmaLoc, diag::err__Pragma_malformed); | |||
270 | return; | |||
271 | } | |||
272 | ||||
273 | // The _Pragma is lexically sound. Destringize according to C11 6.10.9.1: | |||
274 | // "The string literal is destringized by deleting any encoding prefix, | |||
275 | // deleting the leading and trailing double-quotes, replacing each escape | |||
276 | // sequence \" by a double-quote, and replacing each escape sequence \\ by a | |||
277 | // single backslash." | |||
278 | if (StrVal[0] == 'L' || StrVal[0] == 'U' || | |||
279 | (StrVal[0] == 'u' && StrVal[1] != '8')) | |||
280 | StrVal.erase(StrVal.begin()); | |||
281 | else if (StrVal[0] == 'u') | |||
282 | StrVal.erase(StrVal.begin(), StrVal.begin() + 2); | |||
283 | ||||
284 | if (StrVal[0] == 'R') { | |||
285 | // FIXME: C++11 does not specify how to handle raw-string-literals here. | |||
286 | // We strip off the 'R', the quotes, the d-char-sequences, and the parens. | |||
287 | assert(StrVal[1] == '"' && StrVal[StrVal.size() - 1] == '"' &&(static_cast <bool> (StrVal[1] == '"' && StrVal [StrVal.size() - 1] == '"' && "Invalid raw string token!" ) ? void (0) : __assert_fail ("StrVal[1] == '\"' && StrVal[StrVal.size() - 1] == '\"' && \"Invalid raw string token!\"" , "clang/lib/Lex/Pragma.cpp", 288, __extension__ __PRETTY_FUNCTION__ )) | |||
288 | "Invalid raw string token!")(static_cast <bool> (StrVal[1] == '"' && StrVal [StrVal.size() - 1] == '"' && "Invalid raw string token!" ) ? void (0) : __assert_fail ("StrVal[1] == '\"' && StrVal[StrVal.size() - 1] == '\"' && \"Invalid raw string token!\"" , "clang/lib/Lex/Pragma.cpp", 288, __extension__ __PRETTY_FUNCTION__ )); | |||
289 | ||||
290 | // Measure the length of the d-char-sequence. | |||
291 | unsigned NumDChars = 0; | |||
292 | while (StrVal[2 + NumDChars] != '(') { | |||
293 | assert(NumDChars < (StrVal.size() - 5) / 2 &&(static_cast <bool> (NumDChars < (StrVal.size() - 5) / 2 && "Invalid raw string token!") ? void (0) : __assert_fail ("NumDChars < (StrVal.size() - 5) / 2 && \"Invalid raw string token!\"" , "clang/lib/Lex/Pragma.cpp", 294, __extension__ __PRETTY_FUNCTION__ )) | |||
294 | "Invalid raw string token!")(static_cast <bool> (NumDChars < (StrVal.size() - 5) / 2 && "Invalid raw string token!") ? void (0) : __assert_fail ("NumDChars < (StrVal.size() - 5) / 2 && \"Invalid raw string token!\"" , "clang/lib/Lex/Pragma.cpp", 294, __extension__ __PRETTY_FUNCTION__ )); | |||
295 | ++NumDChars; | |||
296 | } | |||
297 | assert(StrVal[StrVal.size() - 2 - NumDChars] == ')')(static_cast <bool> (StrVal[StrVal.size() - 2 - NumDChars ] == ')') ? void (0) : __assert_fail ("StrVal[StrVal.size() - 2 - NumDChars] == ')'" , "clang/lib/Lex/Pragma.cpp", 297, __extension__ __PRETTY_FUNCTION__ )); | |||
298 | ||||
299 | // Remove 'R " d-char-sequence' and 'd-char-sequence "'. We'll replace the | |||
300 | // parens below. | |||
301 | StrVal.erase(0, 2 + NumDChars); | |||
302 | StrVal.erase(StrVal.size() - 1 - NumDChars); | |||
303 | } else { | |||
304 | assert(StrVal[0] == '"' && StrVal[StrVal.size()-1] == '"' &&(static_cast <bool> (StrVal[0] == '"' && StrVal [StrVal.size()-1] == '"' && "Invalid string token!") ? void (0) : __assert_fail ("StrVal[0] == '\"' && StrVal[StrVal.size()-1] == '\"' && \"Invalid string token!\"" , "clang/lib/Lex/Pragma.cpp", 305, __extension__ __PRETTY_FUNCTION__ )) | |||
305 | "Invalid string token!")(static_cast <bool> (StrVal[0] == '"' && StrVal [StrVal.size()-1] == '"' && "Invalid string token!") ? void (0) : __assert_fail ("StrVal[0] == '\"' && StrVal[StrVal.size()-1] == '\"' && \"Invalid string token!\"" , "clang/lib/Lex/Pragma.cpp", 305, __extension__ __PRETTY_FUNCTION__ )); | |||
306 | ||||
307 | // Remove escaped quotes and escapes. | |||
308 | unsigned ResultPos = 1; | |||
309 | for (size_t i = 1, e = StrVal.size() - 1; i != e; ++i) { | |||
310 | // Skip escapes. \\ -> '\' and \" -> '"'. | |||
311 | if (StrVal[i] == '\\' && i + 1 < e && | |||
312 | (StrVal[i + 1] == '\\' || StrVal[i + 1] == '"')) | |||
313 | ++i; | |||
314 | StrVal[ResultPos++] = StrVal[i]; | |||
315 | } | |||
316 | StrVal.erase(StrVal.begin() + ResultPos, StrVal.end() - 1); | |||
317 | } | |||
318 | ||||
319 | // Remove the front quote, replacing it with a space, so that the pragma | |||
320 | // contents appear to have a space before them. | |||
321 | StrVal[0] = ' '; | |||
322 | ||||
323 | // Replace the terminating quote with a \n. | |||
324 | StrVal[StrVal.size()-1] = '\n'; | |||
325 | ||||
326 | // Plop the string (including the newline and trailing null) into a buffer | |||
327 | // where we can lex it. | |||
328 | Token TmpTok; | |||
329 | TmpTok.startToken(); | |||
330 | CreateString(StrVal, TmpTok); | |||
331 | SourceLocation TokLoc = TmpTok.getLocation(); | |||
332 | ||||
333 | // Make and enter a lexer object so that we lex and expand the tokens just | |||
334 | // like any others. | |||
335 | Lexer *TL = Lexer::Create_PragmaLexer(TokLoc, PragmaLoc, RParenLoc, | |||
336 | StrVal.size(), *this); | |||
337 | ||||
338 | EnterSourceFileWithLexer(TL, nullptr); | |||
339 | ||||
340 | // With everything set up, lex this as a #pragma directive. | |||
341 | HandlePragmaDirective({PIK__Pragma, PragmaLoc}); | |||
342 | ||||
343 | // Finally, return whatever came after the pragma directive. | |||
344 | return Lex(Tok); | |||
345 | } | |||
346 | ||||
347 | /// HandleMicrosoft__pragma - Like Handle_Pragma except the pragma text | |||
348 | /// is not enclosed within a string literal. | |||
349 | void Preprocessor::HandleMicrosoft__pragma(Token &Tok) { | |||
350 | // During macro pre-expansion, check the syntax now but put the tokens back | |||
351 | // into the token stream for later consumption. Same as Handle_Pragma. | |||
352 | TokenCollector Toks = {*this, InMacroArgPreExpansion, {}, Tok}; | |||
353 | ||||
354 | // Remember the pragma token location. | |||
355 | SourceLocation PragmaLoc = Tok.getLocation(); | |||
356 | ||||
357 | // Read the '('. | |||
358 | Toks.lex(); | |||
359 | if (Tok.isNot(tok::l_paren)) { | |||
360 | Diag(PragmaLoc, diag::err__Pragma_malformed); | |||
361 | return; | |||
362 | } | |||
363 | ||||
364 | // Get the tokens enclosed within the __pragma(), as well as the final ')'. | |||
365 | SmallVector<Token, 32> PragmaToks; | |||
366 | int NumParens = 0; | |||
367 | Toks.lex(); | |||
368 | while (Tok.isNot(tok::eof)) { | |||
369 | PragmaToks.push_back(Tok); | |||
370 | if (Tok.is(tok::l_paren)) | |||
371 | NumParens++; | |||
372 | else if (Tok.is(tok::r_paren) && NumParens-- == 0) | |||
373 | break; | |||
374 | Toks.lex(); | |||
375 | } | |||
376 | ||||
377 | if (Tok.is(tok::eof)) { | |||
378 | Diag(PragmaLoc, diag::err_unterminated___pragma); | |||
379 | return; | |||
380 | } | |||
381 | ||||
382 | // If we're expanding a macro argument, put the tokens back. | |||
383 | if (InMacroArgPreExpansion) { | |||
384 | Toks.revert(); | |||
385 | return; | |||
386 | } | |||
387 | ||||
388 | PragmaToks.front().setFlag(Token::LeadingSpace); | |||
389 | ||||
390 | // Replace the ')' with an EOD to mark the end of the pragma. | |||
391 | PragmaToks.back().setKind(tok::eod); | |||
392 | ||||
393 | Token *TokArray = new Token[PragmaToks.size()]; | |||
394 | std::copy(PragmaToks.begin(), PragmaToks.end(), TokArray); | |||
395 | ||||
396 | // Push the tokens onto the stack. | |||
397 | EnterTokenStream(TokArray, PragmaToks.size(), true, true, | |||
398 | /*IsReinject*/ false); | |||
399 | ||||
400 | // With everything set up, lex this as a #pragma directive. | |||
401 | HandlePragmaDirective({PIK___pragma, PragmaLoc}); | |||
402 | ||||
403 | // Finally, return whatever came after the pragma directive. | |||
404 | return Lex(Tok); | |||
405 | } | |||
406 | ||||
407 | /// HandlePragmaOnce - Handle \#pragma once. OnceTok is the 'once'. | |||
408 | void Preprocessor::HandlePragmaOnce(Token &OnceTok) { | |||
409 | // Don't honor the 'once' when handling the primary source file, unless | |||
410 | // this is a prefix to a TU, which indicates we're generating a PCH file, or | |||
411 | // when the main file is a header (e.g. when -xc-header is provided on the | |||
412 | // commandline). | |||
413 | if (isInPrimaryFile() && TUKind != TU_Prefix && !getLangOpts().IsHeaderFile) { | |||
414 | Diag(OnceTok, diag::pp_pragma_once_in_main_file); | |||
415 | return; | |||
416 | } | |||
417 | ||||
418 | // Get the current file lexer we're looking at. Ignore _Pragma 'files' etc. | |||
419 | // Mark the file as a once-only file now. | |||
420 | HeaderInfo.MarkFileIncludeOnce(getCurrentFileLexer()->getFileEntry()); | |||
421 | } | |||
422 | ||||
423 | void Preprocessor::HandlePragmaMark(Token &MarkTok) { | |||
424 | assert(CurPPLexer && "No current lexer?")(static_cast <bool> (CurPPLexer && "No current lexer?" ) ? void (0) : __assert_fail ("CurPPLexer && \"No current lexer?\"" , "clang/lib/Lex/Pragma.cpp", 424, __extension__ __PRETTY_FUNCTION__ )); | |||
425 | ||||
426 | SmallString<64> Buffer; | |||
427 | CurLexer->ReadToEndOfLine(&Buffer); | |||
428 | if (Callbacks) | |||
429 | Callbacks->PragmaMark(MarkTok.getLocation(), Buffer); | |||
430 | } | |||
431 | ||||
432 | /// HandlePragmaPoison - Handle \#pragma GCC poison. PoisonTok is the 'poison'. | |||
433 | void Preprocessor::HandlePragmaPoison() { | |||
434 | Token Tok; | |||
435 | ||||
436 | while (true) { | |||
437 | // Read the next token to poison. While doing this, pretend that we are | |||
438 | // skipping while reading the identifier to poison. | |||
439 | // This avoids errors on code like: | |||
440 | // #pragma GCC poison X | |||
441 | // #pragma GCC poison X | |||
442 | if (CurPPLexer) CurPPLexer->LexingRawMode = true; | |||
443 | LexUnexpandedToken(Tok); | |||
444 | if (CurPPLexer) CurPPLexer->LexingRawMode = false; | |||
445 | ||||
446 | // If we reached the end of line, we're done. | |||
447 | if (Tok.is(tok::eod)) return; | |||
448 | ||||
449 | // Can only poison identifiers. | |||
450 | if (Tok.isNot(tok::raw_identifier)) { | |||
451 | Diag(Tok, diag::err_pp_invalid_poison); | |||
452 | return; | |||
453 | } | |||
454 | ||||
455 | // Look up the identifier info for the token. We disabled identifier lookup | |||
456 | // by saying we're skipping contents, so we need to do this manually. | |||
457 | IdentifierInfo *II = LookUpIdentifierInfo(Tok); | |||
458 | ||||
459 | // Already poisoned. | |||
460 | if (II->isPoisoned()) continue; | |||
461 | ||||
462 | // If this is a macro identifier, emit a warning. | |||
463 | if (isMacroDefined(II)) | |||
464 | Diag(Tok, diag::pp_poisoning_existing_macro); | |||
465 | ||||
466 | // Finally, poison it! | |||
467 | II->setIsPoisoned(); | |||
468 | if (II->isFromAST()) | |||
469 | II->setChangedSinceDeserialization(); | |||
470 | } | |||
471 | } | |||
472 | ||||
473 | /// HandlePragmaSystemHeader - Implement \#pragma GCC system_header. We know | |||
474 | /// that the whole directive has been parsed. | |||
475 | void Preprocessor::HandlePragmaSystemHeader(Token &SysHeaderTok) { | |||
476 | if (isInPrimaryFile()) { | |||
477 | Diag(SysHeaderTok, diag::pp_pragma_sysheader_in_main_file); | |||
478 | return; | |||
479 | } | |||
480 | ||||
481 | // Get the current file lexer we're looking at. Ignore _Pragma 'files' etc. | |||
482 | PreprocessorLexer *TheLexer = getCurrentFileLexer(); | |||
483 | ||||
484 | // Mark the file as a system header. | |||
485 | HeaderInfo.MarkFileSystemHeader(TheLexer->getFileEntry()); | |||
486 | ||||
487 | PresumedLoc PLoc = SourceMgr.getPresumedLoc(SysHeaderTok.getLocation()); | |||
488 | if (PLoc.isInvalid()) | |||
489 | return; | |||
490 | ||||
491 | unsigned FilenameID = SourceMgr.getLineTableFilenameID(PLoc.getFilename()); | |||
492 | ||||
493 | // Notify the client, if desired, that we are in a new source file. | |||
494 | if (Callbacks) | |||
495 | Callbacks->FileChanged(SysHeaderTok.getLocation(), | |||
496 | PPCallbacks::SystemHeaderPragma, SrcMgr::C_System); | |||
497 | ||||
498 | // Emit a line marker. This will change any source locations from this point | |||
499 | // forward to realize they are in a system header. | |||
500 | // Create a line note with this information. | |||
501 | SourceMgr.AddLineNote(SysHeaderTok.getLocation(), PLoc.getLine() + 1, | |||
502 | FilenameID, /*IsEntry=*/false, /*IsExit=*/false, | |||
503 | SrcMgr::C_System); | |||
504 | } | |||
505 | ||||
506 | static llvm::Optional<Token> LexHeader(Preprocessor &PP, | |||
507 | Optional<FileEntryRef> &File, | |||
508 | bool SuppressIncludeNotFoundError) { | |||
509 | Token FilenameTok; | |||
510 | if (PP.LexHeaderName(FilenameTok, /*AllowConcatenation*/ false)) | |||
511 | return llvm::None; | |||
512 | ||||
513 | // If the next token wasn't a header-name, diagnose the error. | |||
514 | if (FilenameTok.isNot(tok::header_name)) { | |||
515 | PP.Diag(FilenameTok.getLocation(), diag::err_pp_expects_filename); | |||
516 | return llvm::None; | |||
517 | } | |||
518 | ||||
519 | // Reserve a buffer to get the spelling. | |||
520 | SmallString<128> FilenameBuffer; | |||
521 | bool Invalid = false; | |||
522 | StringRef Filename = PP.getSpelling(FilenameTok, FilenameBuffer, &Invalid); | |||
523 | if (Invalid) | |||
524 | return llvm::None; | |||
525 | ||||
526 | bool isAngled = | |||
527 | PP.GetIncludeFilenameSpelling(FilenameTok.getLocation(), Filename); | |||
528 | // If GetIncludeFilenameSpelling set the start ptr to null, there was an | |||
529 | // error. | |||
530 | if (Filename.empty()) | |||
531 | return llvm::None; | |||
532 | ||||
533 | // Search include directories for this file. | |||
534 | File = PP.LookupFile(FilenameTok.getLocation(), Filename, isAngled, nullptr, | |||
535 | nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, | |||
536 | nullptr); | |||
537 | if (!File) { | |||
538 | if (!SuppressIncludeNotFoundError) | |||
539 | PP.Diag(FilenameTok, diag::err_pp_file_not_found) << Filename; | |||
540 | return llvm::None; | |||
541 | } | |||
542 | ||||
543 | return FilenameTok; | |||
544 | } | |||
545 | ||||
546 | /// HandlePragmaIncludeInstead - Handle \#pragma clang include_instead(header). | |||
547 | void Preprocessor::HandlePragmaIncludeInstead(Token &Tok) { | |||
548 | // Get the current file lexer we're looking at. Ignore _Pragma 'files' etc. | |||
549 | PreprocessorLexer *TheLexer = getCurrentFileLexer(); | |||
550 | ||||
551 | if (!SourceMgr.isInSystemHeader(Tok.getLocation())) { | |||
552 | Diag(Tok, diag::err_pragma_include_instead_not_sysheader); | |||
553 | return; | |||
554 | } | |||
555 | ||||
556 | Lex(Tok); | |||
557 | if (Tok.isNot(tok::l_paren)) { | |||
558 | Diag(Tok, diag::err_expected) << "("; | |||
559 | return; | |||
560 | } | |||
561 | ||||
562 | Optional<FileEntryRef> File; | |||
563 | llvm::Optional<Token> FilenameTok = | |||
564 | LexHeader(*this, File, SuppressIncludeNotFoundError); | |||
565 | if (!FilenameTok) | |||
566 | return; | |||
567 | ||||
568 | Lex(Tok); | |||
569 | if (Tok.isNot(tok::r_paren)) { | |||
570 | Diag(Tok, diag::err_expected) << ")"; | |||
571 | return; | |||
572 | } | |||
573 | ||||
574 | SmallString<128> FilenameBuffer; | |||
575 | StringRef Filename = getSpelling(*FilenameTok, FilenameBuffer); | |||
576 | HeaderInfo.AddFileAlias(TheLexer->getFileEntry(), Filename); | |||
577 | } | |||
578 | ||||
579 | /// HandlePragmaDependency - Handle \#pragma GCC dependency "foo" blah. | |||
580 | void Preprocessor::HandlePragmaDependency(Token &DependencyTok) { | |||
581 | Optional<FileEntryRef> File; | |||
582 | llvm::Optional<Token> FilenameTok = | |||
583 | LexHeader(*this, File, SuppressIncludeNotFoundError); | |||
584 | if (!FilenameTok) | |||
585 | return; | |||
586 | ||||
587 | const FileEntry *CurFile = getCurrentFileLexer()->getFileEntry(); | |||
588 | ||||
589 | // If this file is older than the file it depends on, emit a diagnostic. | |||
590 | if (CurFile && CurFile->getModificationTime() < File->getModificationTime()) { | |||
591 | // Lex tokens at the end of the message and include them in the message. | |||
592 | std::string Message; | |||
593 | Lex(DependencyTok); | |||
594 | while (DependencyTok.isNot(tok::eod)) { | |||
595 | Message += getSpelling(DependencyTok) + " "; | |||
596 | Lex(DependencyTok); | |||
597 | } | |||
598 | ||||
599 | // Remove the trailing ' ' if present. | |||
600 | if (!Message.empty()) | |||
601 | Message.erase(Message.end()-1); | |||
602 | Diag(*FilenameTok, diag::pp_out_of_date_dependency) << Message; | |||
603 | } | |||
604 | } | |||
605 | ||||
606 | /// ParsePragmaPushOrPopMacro - Handle parsing of pragma push_macro/pop_macro. | |||
607 | /// Return the IdentifierInfo* associated with the macro to push or pop. | |||
608 | IdentifierInfo *Preprocessor::ParsePragmaPushOrPopMacro(Token &Tok) { | |||
609 | // Remember the pragma token location. | |||
610 | Token PragmaTok = Tok; | |||
611 | ||||
612 | // Read the '('. | |||
613 | Lex(Tok); | |||
614 | if (Tok.isNot(tok::l_paren)) { | |||
615 | Diag(PragmaTok.getLocation(), diag::err_pragma_push_pop_macro_malformed) | |||
616 | << getSpelling(PragmaTok); | |||
617 | return nullptr; | |||
618 | } | |||
619 | ||||
620 | // Read the macro name string. | |||
621 | Lex(Tok); | |||
622 | if (Tok.isNot(tok::string_literal)) { | |||
623 | Diag(PragmaTok.getLocation(), diag::err_pragma_push_pop_macro_malformed) | |||
624 | << getSpelling(PragmaTok); | |||
625 | return nullptr; | |||
626 | } | |||
627 | ||||
628 | if (Tok.hasUDSuffix()) { | |||
629 | Diag(Tok, diag::err_invalid_string_udl); | |||
630 | return nullptr; | |||
631 | } | |||
632 | ||||
633 | // Remember the macro string. | |||
634 | std::string StrVal = getSpelling(Tok); | |||
635 | ||||
636 | // Read the ')'. | |||
637 | Lex(Tok); | |||
638 | if (Tok.isNot(tok::r_paren)) { | |||
639 | Diag(PragmaTok.getLocation(), diag::err_pragma_push_pop_macro_malformed) | |||
640 | << getSpelling(PragmaTok); | |||
641 | return nullptr; | |||
642 | } | |||
643 | ||||
644 | assert(StrVal[0] == '"' && StrVal[StrVal.size()-1] == '"' &&(static_cast <bool> (StrVal[0] == '"' && StrVal [StrVal.size()-1] == '"' && "Invalid string token!") ? void (0) : __assert_fail ("StrVal[0] == '\"' && StrVal[StrVal.size()-1] == '\"' && \"Invalid string token!\"" , "clang/lib/Lex/Pragma.cpp", 645, __extension__ __PRETTY_FUNCTION__ )) | |||
645 | "Invalid string token!")(static_cast <bool> (StrVal[0] == '"' && StrVal [StrVal.size()-1] == '"' && "Invalid string token!") ? void (0) : __assert_fail ("StrVal[0] == '\"' && StrVal[StrVal.size()-1] == '\"' && \"Invalid string token!\"" , "clang/lib/Lex/Pragma.cpp", 645, __extension__ __PRETTY_FUNCTION__ )); | |||
646 | ||||
647 | // Create a Token from the string. | |||
648 | Token MacroTok; | |||
649 | MacroTok.startToken(); | |||
650 | MacroTok.setKind(tok::raw_identifier); | |||
651 | CreateString(StringRef(&StrVal[1], StrVal.size() - 2), MacroTok); | |||
652 | ||||
653 | // Get the IdentifierInfo of MacroToPushTok. | |||
654 | return LookUpIdentifierInfo(MacroTok); | |||
655 | } | |||
656 | ||||
657 | /// Handle \#pragma push_macro. | |||
658 | /// | |||
659 | /// The syntax is: | |||
660 | /// \code | |||
661 | /// #pragma push_macro("macro") | |||
662 | /// \endcode | |||
663 | void Preprocessor::HandlePragmaPushMacro(Token &PushMacroTok) { | |||
664 | // Parse the pragma directive and get the macro IdentifierInfo*. | |||
665 | IdentifierInfo *IdentInfo = ParsePragmaPushOrPopMacro(PushMacroTok); | |||
666 | if (!IdentInfo) return; | |||
667 | ||||
668 | // Get the MacroInfo associated with IdentInfo. | |||
669 | MacroInfo *MI = getMacroInfo(IdentInfo); | |||
670 | ||||
671 | if (MI) { | |||
672 | // Allow the original MacroInfo to be redefined later. | |||
673 | MI->setIsAllowRedefinitionsWithoutWarning(true); | |||
674 | } | |||
675 | ||||
676 | // Push the cloned MacroInfo so we can retrieve it later. | |||
677 | PragmaPushMacroInfo[IdentInfo].push_back(MI); | |||
678 | } | |||
679 | ||||
680 | /// Handle \#pragma pop_macro. | |||
681 | /// | |||
682 | /// The syntax is: | |||
683 | /// \code | |||
684 | /// #pragma pop_macro("macro") | |||
685 | /// \endcode | |||
686 | void Preprocessor::HandlePragmaPopMacro(Token &PopMacroTok) { | |||
687 | SourceLocation MessageLoc = PopMacroTok.getLocation(); | |||
688 | ||||
689 | // Parse the pragma directive and get the macro IdentifierInfo*. | |||
690 | IdentifierInfo *IdentInfo = ParsePragmaPushOrPopMacro(PopMacroTok); | |||
691 | if (!IdentInfo) return; | |||
692 | ||||
693 | // Find the vector<MacroInfo*> associated with the macro. | |||
694 | llvm::DenseMap<IdentifierInfo *, std::vector<MacroInfo *>>::iterator iter = | |||
695 | PragmaPushMacroInfo.find(IdentInfo); | |||
696 | if (iter != PragmaPushMacroInfo.end()) { | |||
697 | // Forget the MacroInfo currently associated with IdentInfo. | |||
698 | if (MacroInfo *MI = getMacroInfo(IdentInfo)) { | |||
699 | if (MI->isWarnIfUnused()) | |||
700 | WarnUnusedMacroLocs.erase(MI->getDefinitionLoc()); | |||
701 | appendMacroDirective(IdentInfo, AllocateUndefMacroDirective(MessageLoc)); | |||
702 | } | |||
703 | ||||
704 | // Get the MacroInfo we want to reinstall. | |||
705 | MacroInfo *MacroToReInstall = iter->second.back(); | |||
706 | ||||
707 | if (MacroToReInstall) | |||
708 | // Reinstall the previously pushed macro. | |||
709 | appendDefMacroDirective(IdentInfo, MacroToReInstall, MessageLoc); | |||
710 | ||||
711 | // Pop PragmaPushMacroInfo stack. | |||
712 | iter->second.pop_back(); | |||
713 | if (iter->second.empty()) | |||
714 | PragmaPushMacroInfo.erase(iter); | |||
715 | } else { | |||
716 | Diag(MessageLoc, diag::warn_pragma_pop_macro_no_push) | |||
717 | << IdentInfo->getName(); | |||
718 | } | |||
719 | } | |||
720 | ||||
721 | void Preprocessor::HandlePragmaIncludeAlias(Token &Tok) { | |||
722 | // We will either get a quoted filename or a bracketed filename, and we | |||
723 | // have to track which we got. The first filename is the source name, | |||
724 | // and the second name is the mapped filename. If the first is quoted, | |||
725 | // the second must be as well (cannot mix and match quotes and brackets). | |||
726 | ||||
727 | // Get the open paren | |||
728 | Lex(Tok); | |||
729 | if (Tok.isNot(tok::l_paren)) { | |||
730 | Diag(Tok, diag::warn_pragma_include_alias_expected) << "("; | |||
731 | return; | |||
732 | } | |||
733 | ||||
734 | // We expect either a quoted string literal, or a bracketed name | |||
735 | Token SourceFilenameTok; | |||
736 | if (LexHeaderName(SourceFilenameTok)) | |||
737 | return; | |||
738 | ||||
739 | StringRef SourceFileName; | |||
740 | SmallString<128> FileNameBuffer; | |||
741 | if (SourceFilenameTok.is(tok::header_name)) { | |||
742 | SourceFileName = getSpelling(SourceFilenameTok, FileNameBuffer); | |||
743 | } else { | |||
744 | Diag(Tok, diag::warn_pragma_include_alias_expected_filename); | |||
745 | return; | |||
746 | } | |||
747 | FileNameBuffer.clear(); | |||
748 | ||||
749 | // Now we expect a comma, followed by another include name | |||
750 | Lex(Tok); | |||
751 | if (Tok.isNot(tok::comma)) { | |||
752 | Diag(Tok, diag::warn_pragma_include_alias_expected) << ","; | |||
753 | return; | |||
754 | } | |||
755 | ||||
756 | Token ReplaceFilenameTok; | |||
757 | if (LexHeaderName(ReplaceFilenameTok)) | |||
758 | return; | |||
759 | ||||
760 | StringRef ReplaceFileName; | |||
761 | if (ReplaceFilenameTok.is(tok::header_name)) { | |||
762 | ReplaceFileName = getSpelling(ReplaceFilenameTok, FileNameBuffer); | |||
763 | } else { | |||
764 | Diag(Tok, diag::warn_pragma_include_alias_expected_filename); | |||
765 | return; | |||
766 | } | |||
767 | ||||
768 | // Finally, we expect the closing paren | |||
769 | Lex(Tok); | |||
770 | if (Tok.isNot(tok::r_paren)) { | |||
771 | Diag(Tok, diag::warn_pragma_include_alias_expected) << ")"; | |||
772 | return; | |||
773 | } | |||
774 | ||||
775 | // Now that we have the source and target filenames, we need to make sure | |||
776 | // they're both of the same type (angled vs non-angled) | |||
777 | StringRef OriginalSource = SourceFileName; | |||
778 | ||||
779 | bool SourceIsAngled = | |||
780 | GetIncludeFilenameSpelling(SourceFilenameTok.getLocation(), | |||
781 | SourceFileName); | |||
782 | bool ReplaceIsAngled = | |||
783 | GetIncludeFilenameSpelling(ReplaceFilenameTok.getLocation(), | |||
784 | ReplaceFileName); | |||
785 | if (!SourceFileName.empty() && !ReplaceFileName.empty() && | |||
786 | (SourceIsAngled != ReplaceIsAngled)) { | |||
787 | unsigned int DiagID; | |||
788 | if (SourceIsAngled) | |||
789 | DiagID = diag::warn_pragma_include_alias_mismatch_angle; | |||
790 | else | |||
791 | DiagID = diag::warn_pragma_include_alias_mismatch_quote; | |||
792 | ||||
793 | Diag(SourceFilenameTok.getLocation(), DiagID) | |||
794 | << SourceFileName | |||
795 | << ReplaceFileName; | |||
796 | ||||
797 | return; | |||
798 | } | |||
799 | ||||
800 | // Now we can let the include handler know about this mapping | |||
801 | getHeaderSearchInfo().AddIncludeAlias(OriginalSource, ReplaceFileName); | |||
802 | } | |||
803 | ||||
804 | // Lex a component of a module name: either an identifier or a string literal; | |||
805 | // for components that can be expressed both ways, the two forms are equivalent. | |||
806 | static bool LexModuleNameComponent( | |||
807 | Preprocessor &PP, Token &Tok, | |||
808 | std::pair<IdentifierInfo *, SourceLocation> &ModuleNameComponent, | |||
809 | bool First) { | |||
810 | PP.LexUnexpandedToken(Tok); | |||
811 | if (Tok.is(tok::string_literal) && !Tok.hasUDSuffix()) { | |||
812 | StringLiteralParser Literal(Tok, PP); | |||
813 | if (Literal.hadError) | |||
814 | return true; | |||
815 | ModuleNameComponent = std::make_pair( | |||
816 | PP.getIdentifierInfo(Literal.GetString()), Tok.getLocation()); | |||
817 | } else if (!Tok.isAnnotation() && Tok.getIdentifierInfo()) { | |||
818 | ModuleNameComponent = | |||
819 | std::make_pair(Tok.getIdentifierInfo(), Tok.getLocation()); | |||
820 | } else { | |||
821 | PP.Diag(Tok.getLocation(), diag::err_pp_expected_module_name) << First; | |||
822 | return true; | |||
823 | } | |||
824 | return false; | |||
825 | } | |||
826 | ||||
827 | static bool LexModuleName( | |||
828 | Preprocessor &PP, Token &Tok, | |||
829 | llvm::SmallVectorImpl<std::pair<IdentifierInfo *, SourceLocation>> | |||
830 | &ModuleName) { | |||
831 | while (true) { | |||
832 | std::pair<IdentifierInfo*, SourceLocation> NameComponent; | |||
833 | if (LexModuleNameComponent(PP, Tok, NameComponent, ModuleName.empty())) | |||
834 | return true; | |||
835 | ModuleName.push_back(NameComponent); | |||
836 | ||||
837 | PP.LexUnexpandedToken(Tok); | |||
838 | if (Tok.isNot(tok::period)) | |||
839 | return false; | |||
840 | } | |||
841 | } | |||
842 | ||||
843 | void Preprocessor::HandlePragmaModuleBuild(Token &Tok) { | |||
844 | SourceLocation Loc = Tok.getLocation(); | |||
845 | ||||
846 | std::pair<IdentifierInfo *, SourceLocation> ModuleNameLoc; | |||
847 | if (LexModuleNameComponent(*this, Tok, ModuleNameLoc, true)) | |||
848 | return; | |||
849 | IdentifierInfo *ModuleName = ModuleNameLoc.first; | |||
850 | ||||
851 | LexUnexpandedToken(Tok); | |||
852 | if (Tok.isNot(tok::eod)) { | |||
853 | Diag(Tok, diag::ext_pp_extra_tokens_at_eol) << "pragma"; | |||
854 | DiscardUntilEndOfDirective(); | |||
855 | } | |||
856 | ||||
857 | CurLexer->LexingRawMode = true; | |||
858 | ||||
859 | auto TryConsumeIdentifier = [&](StringRef Ident) -> bool { | |||
860 | if (Tok.getKind() != tok::raw_identifier || | |||
861 | Tok.getRawIdentifier() != Ident) | |||
862 | return false; | |||
863 | CurLexer->Lex(Tok); | |||
864 | return true; | |||
865 | }; | |||
866 | ||||
867 | // Scan forward looking for the end of the module. | |||
868 | const char *Start = CurLexer->getBufferLocation(); | |||
869 | const char *End = nullptr; | |||
870 | unsigned NestingLevel = 1; | |||
871 | while (true) { | |||
872 | End = CurLexer->getBufferLocation(); | |||
873 | CurLexer->Lex(Tok); | |||
874 | ||||
875 | if (Tok.is(tok::eof)) { | |||
876 | Diag(Loc, diag::err_pp_module_build_missing_end); | |||
877 | break; | |||
878 | } | |||
879 | ||||
880 | if (Tok.isNot(tok::hash) || !Tok.isAtStartOfLine()) { | |||
881 | // Token was part of module; keep going. | |||
882 | continue; | |||
883 | } | |||
884 | ||||
885 | // We hit something directive-shaped; check to see if this is the end | |||
886 | // of the module build. | |||
887 | CurLexer->ParsingPreprocessorDirective = true; | |||
888 | CurLexer->Lex(Tok); | |||
889 | if (TryConsumeIdentifier("pragma") && TryConsumeIdentifier("clang") && | |||
890 | TryConsumeIdentifier("module")) { | |||
891 | if (TryConsumeIdentifier("build")) | |||
892 | // #pragma clang module build -> entering a nested module build. | |||
893 | ++NestingLevel; | |||
894 | else if (TryConsumeIdentifier("endbuild")) { | |||
895 | // #pragma clang module endbuild -> leaving a module build. | |||
896 | if (--NestingLevel == 0) | |||
897 | break; | |||
898 | } | |||
899 | // We should either be looking at the EOD or more of the current directive | |||
900 | // preceding the EOD. Either way we can ignore this token and keep going. | |||
901 | assert(Tok.getKind() != tok::eof && "missing EOD before EOF")(static_cast <bool> (Tok.getKind() != tok::eof && "missing EOD before EOF") ? void (0) : __assert_fail ("Tok.getKind() != tok::eof && \"missing EOD before EOF\"" , "clang/lib/Lex/Pragma.cpp", 901, __extension__ __PRETTY_FUNCTION__ )); | |||
902 | } | |||
903 | } | |||
904 | ||||
905 | CurLexer->LexingRawMode = false; | |||
906 | ||||
907 | // Load the extracted text as a preprocessed module. | |||
908 | assert(CurLexer->getBuffer().begin() <= Start &&(static_cast <bool> (CurLexer->getBuffer().begin() <= Start && Start <= CurLexer->getBuffer().end() && CurLexer->getBuffer().begin() <= End && End <= CurLexer->getBuffer().end() && "module source range not contained within same file buffer" ) ? void (0) : __assert_fail ("CurLexer->getBuffer().begin() <= Start && Start <= CurLexer->getBuffer().end() && CurLexer->getBuffer().begin() <= End && End <= CurLexer->getBuffer().end() && \"module source range not contained within same file buffer\"" , "clang/lib/Lex/Pragma.cpp", 912, __extension__ __PRETTY_FUNCTION__ )) | |||
909 | Start <= CurLexer->getBuffer().end() &&(static_cast <bool> (CurLexer->getBuffer().begin() <= Start && Start <= CurLexer->getBuffer().end() && CurLexer->getBuffer().begin() <= End && End <= CurLexer->getBuffer().end() && "module source range not contained within same file buffer" ) ? void (0) : __assert_fail ("CurLexer->getBuffer().begin() <= Start && Start <= CurLexer->getBuffer().end() && CurLexer->getBuffer().begin() <= End && End <= CurLexer->getBuffer().end() && \"module source range not contained within same file buffer\"" , "clang/lib/Lex/Pragma.cpp", 912, __extension__ __PRETTY_FUNCTION__ )) | |||
910 | CurLexer->getBuffer().begin() <= End &&(static_cast <bool> (CurLexer->getBuffer().begin() <= Start && Start <= CurLexer->getBuffer().end() && CurLexer->getBuffer().begin() <= End && End <= CurLexer->getBuffer().end() && "module source range not contained within same file buffer" ) ? void (0) : __assert_fail ("CurLexer->getBuffer().begin() <= Start && Start <= CurLexer->getBuffer().end() && CurLexer->getBuffer().begin() <= End && End <= CurLexer->getBuffer().end() && \"module source range not contained within same file buffer\"" , "clang/lib/Lex/Pragma.cpp", 912, __extension__ __PRETTY_FUNCTION__ )) | |||
911 | End <= CurLexer->getBuffer().end() &&(static_cast <bool> (CurLexer->getBuffer().begin() <= Start && Start <= CurLexer->getBuffer().end() && CurLexer->getBuffer().begin() <= End && End <= CurLexer->getBuffer().end() && "module source range not contained within same file buffer" ) ? void (0) : __assert_fail ("CurLexer->getBuffer().begin() <= Start && Start <= CurLexer->getBuffer().end() && CurLexer->getBuffer().begin() <= End && End <= CurLexer->getBuffer().end() && \"module source range not contained within same file buffer\"" , "clang/lib/Lex/Pragma.cpp", 912, __extension__ __PRETTY_FUNCTION__ )) | |||
912 | "module source range not contained within same file buffer")(static_cast <bool> (CurLexer->getBuffer().begin() <= Start && Start <= CurLexer->getBuffer().end() && CurLexer->getBuffer().begin() <= End && End <= CurLexer->getBuffer().end() && "module source range not contained within same file buffer" ) ? void (0) : __assert_fail ("CurLexer->getBuffer().begin() <= Start && Start <= CurLexer->getBuffer().end() && CurLexer->getBuffer().begin() <= End && End <= CurLexer->getBuffer().end() && \"module source range not contained within same file buffer\"" , "clang/lib/Lex/Pragma.cpp", 912, __extension__ __PRETTY_FUNCTION__ )); | |||
913 | TheModuleLoader.createModuleFromSource(Loc, ModuleName->getName(), | |||
914 | StringRef(Start, End - Start)); | |||
915 | } | |||
916 | ||||
917 | void Preprocessor::HandlePragmaHdrstop(Token &Tok) { | |||
918 | Lex(Tok); | |||
919 | if (Tok.is(tok::l_paren)) { | |||
920 | Diag(Tok.getLocation(), diag::warn_pp_hdrstop_filename_ignored); | |||
921 | ||||
922 | std::string FileName; | |||
923 | if (!LexStringLiteral(Tok, FileName, "pragma hdrstop", false)) | |||
924 | return; | |||
925 | ||||
926 | if (Tok.isNot(tok::r_paren)) { | |||
927 | Diag(Tok, diag::err_expected) << tok::r_paren; | |||
928 | return; | |||
929 | } | |||
930 | Lex(Tok); | |||
931 | } | |||
932 | if (Tok.isNot(tok::eod)) | |||
933 | Diag(Tok.getLocation(), diag::ext_pp_extra_tokens_at_eol) | |||
934 | << "pragma hdrstop"; | |||
935 | ||||
936 | if (creatingPCHWithPragmaHdrStop() && | |||
937 | SourceMgr.isInMainFile(Tok.getLocation())) { | |||
938 | assert(CurLexer && "no lexer for #pragma hdrstop processing")(static_cast <bool> (CurLexer && "no lexer for #pragma hdrstop processing" ) ? void (0) : __assert_fail ("CurLexer && \"no lexer for #pragma hdrstop processing\"" , "clang/lib/Lex/Pragma.cpp", 938, __extension__ __PRETTY_FUNCTION__ )); | |||
939 | Token &Result = Tok; | |||
940 | Result.startToken(); | |||
941 | CurLexer->FormTokenWithChars(Result, CurLexer->BufferEnd, tok::eof); | |||
942 | CurLexer->cutOffLexing(); | |||
943 | } | |||
944 | if (usingPCHWithPragmaHdrStop()) | |||
945 | SkippingUntilPragmaHdrStop = false; | |||
946 | } | |||
947 | ||||
948 | /// AddPragmaHandler - Add the specified pragma handler to the preprocessor. | |||
949 | /// If 'Namespace' is non-null, then it is a token required to exist on the | |||
950 | /// pragma line before the pragma string starts, e.g. "STDC" or "GCC". | |||
951 | void Preprocessor::AddPragmaHandler(StringRef Namespace, | |||
952 | PragmaHandler *Handler) { | |||
953 | PragmaNamespace *InsertNS = PragmaHandlers.get(); | |||
954 | ||||
955 | // If this is specified to be in a namespace, step down into it. | |||
956 | if (!Namespace.empty()) { | |||
957 | // If there is already a pragma handler with the name of this namespace, | |||
958 | // we either have an error (directive with the same name as a namespace) or | |||
959 | // we already have the namespace to insert into. | |||
960 | if (PragmaHandler *Existing = PragmaHandlers->FindHandler(Namespace)) { | |||
961 | InsertNS = Existing->getIfNamespace(); | |||
962 | assert(InsertNS != nullptr && "Cannot have a pragma namespace and pragma"(static_cast <bool> (InsertNS != nullptr && "Cannot have a pragma namespace and pragma" " handler with the same name!") ? void (0) : __assert_fail ( "InsertNS != nullptr && \"Cannot have a pragma namespace and pragma\" \" handler with the same name!\"" , "clang/lib/Lex/Pragma.cpp", 963, __extension__ __PRETTY_FUNCTION__ )) | |||
963 | " handler with the same name!")(static_cast <bool> (InsertNS != nullptr && "Cannot have a pragma namespace and pragma" " handler with the same name!") ? void (0) : __assert_fail ( "InsertNS != nullptr && \"Cannot have a pragma namespace and pragma\" \" handler with the same name!\"" , "clang/lib/Lex/Pragma.cpp", 963, __extension__ __PRETTY_FUNCTION__ )); | |||
964 | } else { | |||
965 | // Otherwise, this namespace doesn't exist yet, create and insert the | |||
966 | // handler for it. | |||
967 | InsertNS = new PragmaNamespace(Namespace); | |||
968 | PragmaHandlers->AddPragma(InsertNS); | |||
969 | } | |||
970 | } | |||
971 | ||||
972 | // Check to make sure we don't already have a pragma for this identifier. | |||
973 | assert(!InsertNS->FindHandler(Handler->getName()) &&(static_cast <bool> (!InsertNS->FindHandler(Handler-> getName()) && "Pragma handler already exists for this identifier!" ) ? void (0) : __assert_fail ("!InsertNS->FindHandler(Handler->getName()) && \"Pragma handler already exists for this identifier!\"" , "clang/lib/Lex/Pragma.cpp", 974, __extension__ __PRETTY_FUNCTION__ )) | |||
974 | "Pragma handler already exists for this identifier!")(static_cast <bool> (!InsertNS->FindHandler(Handler-> getName()) && "Pragma handler already exists for this identifier!" ) ? void (0) : __assert_fail ("!InsertNS->FindHandler(Handler->getName()) && \"Pragma handler already exists for this identifier!\"" , "clang/lib/Lex/Pragma.cpp", 974, __extension__ __PRETTY_FUNCTION__ )); | |||
975 | InsertNS->AddPragma(Handler); | |||
976 | } | |||
977 | ||||
978 | /// RemovePragmaHandler - Remove the specific pragma handler from the | |||
979 | /// preprocessor. If \arg Namespace is non-null, then it should be the | |||
980 | /// namespace that \arg Handler was added to. It is an error to remove | |||
981 | /// a handler that has not been registered. | |||
982 | void Preprocessor::RemovePragmaHandler(StringRef Namespace, | |||
983 | PragmaHandler *Handler) { | |||
984 | PragmaNamespace *NS = PragmaHandlers.get(); | |||
985 | ||||
986 | // If this is specified to be in a namespace, step down into it. | |||
987 | if (!Namespace.empty()) { | |||
988 | PragmaHandler *Existing = PragmaHandlers->FindHandler(Namespace); | |||
989 | assert(Existing && "Namespace containing handler does not exist!")(static_cast <bool> (Existing && "Namespace containing handler does not exist!" ) ? void (0) : __assert_fail ("Existing && \"Namespace containing handler does not exist!\"" , "clang/lib/Lex/Pragma.cpp", 989, __extension__ __PRETTY_FUNCTION__ )); | |||
990 | ||||
991 | NS = Existing->getIfNamespace(); | |||
992 | assert(NS && "Invalid namespace, registered as a regular pragma handler!")(static_cast <bool> (NS && "Invalid namespace, registered as a regular pragma handler!" ) ? void (0) : __assert_fail ("NS && \"Invalid namespace, registered as a regular pragma handler!\"" , "clang/lib/Lex/Pragma.cpp", 992, __extension__ __PRETTY_FUNCTION__ )); | |||
993 | } | |||
994 | ||||
995 | NS->RemovePragmaHandler(Handler); | |||
996 | ||||
997 | // If this is a non-default namespace and it is now empty, remove it. | |||
998 | if (NS != PragmaHandlers.get() && NS->IsEmpty()) { | |||
999 | PragmaHandlers->RemovePragmaHandler(NS); | |||
1000 | delete NS; | |||
1001 | } | |||
1002 | } | |||
1003 | ||||
1004 | bool Preprocessor::LexOnOffSwitch(tok::OnOffSwitch &Result) { | |||
1005 | Token Tok; | |||
1006 | LexUnexpandedToken(Tok); | |||
1007 | ||||
1008 | if (Tok.isNot(tok::identifier)) { | |||
1009 | Diag(Tok, diag::ext_on_off_switch_syntax); | |||
1010 | return true; | |||
1011 | } | |||
1012 | IdentifierInfo *II = Tok.getIdentifierInfo(); | |||
1013 | if (II->isStr("ON")) | |||
1014 | Result = tok::OOS_ON; | |||
1015 | else if (II->isStr("OFF")) | |||
1016 | Result = tok::OOS_OFF; | |||
1017 | else if (II->isStr("DEFAULT")) | |||
1018 | Result = tok::OOS_DEFAULT; | |||
1019 | else { | |||
1020 | Diag(Tok, diag::ext_on_off_switch_syntax); | |||
1021 | return true; | |||
1022 | } | |||
1023 | ||||
1024 | // Verify that this is followed by EOD. | |||
1025 | LexUnexpandedToken(Tok); | |||
1026 | if (Tok.isNot(tok::eod)) | |||
1027 | Diag(Tok, diag::ext_pragma_syntax_eod); | |||
1028 | return false; | |||
1029 | } | |||
1030 | ||||
1031 | namespace { | |||
1032 | ||||
1033 | /// PragmaOnceHandler - "\#pragma once" marks the file as atomically included. | |||
1034 | struct PragmaOnceHandler : public PragmaHandler { | |||
1035 | PragmaOnceHandler() : PragmaHandler("once") {} | |||
1036 | ||||
1037 | void HandlePragma(Preprocessor &PP, PragmaIntroducer Introducer, | |||
1038 | Token &OnceTok) override { | |||
1039 | PP.CheckEndOfDirective("pragma once"); | |||
1040 | PP.HandlePragmaOnce(OnceTok); | |||
1041 | } | |||
1042 | }; | |||
1043 | ||||
1044 | /// PragmaMarkHandler - "\#pragma mark ..." is ignored by the compiler, and the | |||
1045 | /// rest of the line is not lexed. | |||
1046 | struct PragmaMarkHandler : public PragmaHandler { | |||
1047 | PragmaMarkHandler() : PragmaHandler("mark") {} | |||
1048 | ||||
1049 | void HandlePragma(Preprocessor &PP, PragmaIntroducer Introducer, | |||
1050 | Token &MarkTok) override { | |||
1051 | PP.HandlePragmaMark(MarkTok); | |||
1052 | } | |||
1053 | }; | |||
1054 | ||||
1055 | /// PragmaPoisonHandler - "\#pragma poison x" marks x as not usable. | |||
1056 | struct PragmaPoisonHandler : public PragmaHandler { | |||
1057 | PragmaPoisonHandler() : PragmaHandler("poison") {} | |||
1058 | ||||
1059 | void HandlePragma(Preprocessor &PP, PragmaIntroducer Introducer, | |||
1060 | Token &PoisonTok) override { | |||
1061 | PP.HandlePragmaPoison(); | |||
1062 | } | |||
1063 | }; | |||
1064 | ||||
1065 | /// PragmaSystemHeaderHandler - "\#pragma system_header" marks the current file | |||
1066 | /// as a system header, which silences warnings in it. | |||
1067 | struct PragmaSystemHeaderHandler : public PragmaHandler { | |||
1068 | PragmaSystemHeaderHandler() : PragmaHandler("system_header") {} | |||
1069 | ||||
1070 | void HandlePragma(Preprocessor &PP, PragmaIntroducer Introducer, | |||
1071 | Token &SHToken) override { | |||
1072 | PP.HandlePragmaSystemHeader(SHToken); | |||
1073 | PP.CheckEndOfDirective("pragma"); | |||
1074 | } | |||
1075 | }; | |||
1076 | ||||
1077 | /// PragmaIncludeInsteadHandler - "\#pragma clang include_instead(header)" marks | |||
1078 | /// the current file as non-includable if the including header is not a system | |||
1079 | /// header. | |||
1080 | struct PragmaIncludeInsteadHandler : public PragmaHandler { | |||
1081 | PragmaIncludeInsteadHandler() : PragmaHandler("include_instead") {} | |||
1082 | ||||
1083 | void HandlePragma(Preprocessor &PP, PragmaIntroducer Introducer, | |||
1084 | Token &IIToken) override { | |||
1085 | PP.HandlePragmaIncludeInstead(IIToken); | |||
1086 | } | |||
1087 | }; | |||
1088 | ||||
1089 | struct PragmaDependencyHandler : public PragmaHandler { | |||
1090 | PragmaDependencyHandler() : PragmaHandler("dependency") {} | |||
1091 | ||||
1092 | void HandlePragma(Preprocessor &PP, PragmaIntroducer Introducer, | |||
1093 | Token &DepToken) override { | |||
1094 | PP.HandlePragmaDependency(DepToken); | |||
1095 | } | |||
1096 | }; | |||
1097 | ||||
1098 | struct PragmaDebugHandler : public PragmaHandler { | |||
1099 | PragmaDebugHandler() : PragmaHandler("__debug") {} | |||
1100 | ||||
1101 | void HandlePragma(Preprocessor &PP, PragmaIntroducer Introducer, | |||
1102 | Token &DebugToken) override { | |||
1103 | Token Tok; | |||
1104 | PP.LexUnexpandedToken(Tok); | |||
1105 | if (Tok.isNot(tok::identifier)) { | |||
| ||||
1106 | PP.Diag(Tok, diag::warn_pragma_diagnostic_invalid); | |||
1107 | return; | |||
1108 | } | |||
1109 | IdentifierInfo *II = Tok.getIdentifierInfo(); | |||
1110 | ||||
1111 | if (II->isStr("assert")) { | |||
1112 | if (!PP.getPreprocessorOpts().DisablePragmaDebugCrash) | |||
1113 | llvm_unreachable("This is an assertion!")::llvm::llvm_unreachable_internal("This is an assertion!", "clang/lib/Lex/Pragma.cpp" , 1113); | |||
1114 | } else if (II->isStr("crash")) { | |||
1115 | llvm::Timer T("crash", "pragma crash"); | |||
1116 | llvm::TimeRegion R(&T); | |||
1117 | if (!PP.getPreprocessorOpts().DisablePragmaDebugCrash) | |||
1118 | LLVM_BUILTIN_TRAP__builtin_trap(); | |||
1119 | } else if (II->isStr("parser_crash")) { | |||
1120 | if (!PP.getPreprocessorOpts().DisablePragmaDebugCrash) { | |||
1121 | Token Crasher; | |||
1122 | Crasher.startToken(); | |||
1123 | Crasher.setKind(tok::annot_pragma_parser_crash); | |||
1124 | Crasher.setAnnotationRange(SourceRange(Tok.getLocation())); | |||
1125 | PP.EnterToken(Crasher, /*IsReinject*/ false); | |||
1126 | } | |||
1127 | } else if (II->isStr("dump")) { | |||
1128 | Token Identifier; | |||
1129 | PP.LexUnexpandedToken(Identifier); | |||
1130 | if (auto *DumpII = Identifier.getIdentifierInfo()) { | |||
1131 | Token DumpAnnot; | |||
1132 | DumpAnnot.startToken(); | |||
1133 | DumpAnnot.setKind(tok::annot_pragma_dump); | |||
1134 | DumpAnnot.setAnnotationRange( | |||
1135 | SourceRange(Tok.getLocation(), Identifier.getLocation())); | |||
1136 | DumpAnnot.setAnnotationValue(DumpII); | |||
1137 | PP.DiscardUntilEndOfDirective(); | |||
1138 | PP.EnterToken(DumpAnnot, /*IsReinject*/false); | |||
1139 | } else { | |||
1140 | PP.Diag(Identifier, diag::warn_pragma_debug_missing_argument) | |||
1141 | << II->getName(); | |||
1142 | } | |||
1143 | } else if (II->isStr("diag_mapping")) { | |||
1144 | Token DiagName; | |||
1145 | PP.LexUnexpandedToken(DiagName); | |||
1146 | if (DiagName.is(tok::eod)) | |||
1147 | PP.getDiagnostics().dump(); | |||
1148 | else if (DiagName.is(tok::string_literal) && !DiagName.hasUDSuffix()) { | |||
1149 | StringLiteralParser Literal(DiagName, PP); | |||
1150 | if (Literal.hadError) | |||
1151 | return; | |||
1152 | PP.getDiagnostics().dump(Literal.GetString()); | |||
1153 | } else { | |||
1154 | PP.Diag(DiagName, diag::warn_pragma_debug_missing_argument) | |||
1155 | << II->getName(); | |||
1156 | } | |||
1157 | } else if (II->isStr("llvm_fatal_error")) { | |||
1158 | if (!PP.getPreprocessorOpts().DisablePragmaDebugCrash) | |||
1159 | llvm::report_fatal_error("#pragma clang __debug llvm_fatal_error"); | |||
1160 | } else if (II->isStr("llvm_unreachable")) { | |||
1161 | if (!PP.getPreprocessorOpts().DisablePragmaDebugCrash) | |||
1162 | llvm_unreachable("#pragma clang __debug llvm_unreachable")::llvm::llvm_unreachable_internal("#pragma clang __debug llvm_unreachable" , "clang/lib/Lex/Pragma.cpp", 1162); | |||
1163 | } else if (II->isStr("macro")) { | |||
1164 | Token MacroName; | |||
1165 | PP.LexUnexpandedToken(MacroName); | |||
1166 | auto *MacroII = MacroName.getIdentifierInfo(); | |||
1167 | if (MacroII) | |||
1168 | PP.dumpMacroInfo(MacroII); | |||
1169 | else | |||
1170 | PP.Diag(MacroName, diag::warn_pragma_debug_missing_argument) | |||
1171 | << II->getName(); | |||
1172 | } else if (II->isStr("module_map")) { | |||
1173 | llvm::SmallVector<std::pair<IdentifierInfo *, SourceLocation>, 8> | |||
1174 | ModuleName; | |||
1175 | if (LexModuleName(PP, Tok, ModuleName)) | |||
1176 | return; | |||
1177 | ModuleMap &MM = PP.getHeaderSearchInfo().getModuleMap(); | |||
1178 | Module *M = nullptr; | |||
1179 | for (auto IIAndLoc : ModuleName) { | |||
1180 | M = MM.lookupModuleQualified(IIAndLoc.first->getName(), M); | |||
1181 | if (!M) { | |||
1182 | PP.Diag(IIAndLoc.second, diag::warn_pragma_debug_unknown_module) | |||
1183 | << IIAndLoc.first; | |||
1184 | return; | |||
1185 | } | |||
1186 | } | |||
1187 | M->dump(); | |||
| ||||
1188 | } else if (II->isStr("overflow_stack")) { | |||
1189 | if (!PP.getPreprocessorOpts().DisablePragmaDebugCrash) | |||
1190 | DebugOverflowStack(); | |||
1191 | } else if (II->isStr("captured")) { | |||
1192 | HandleCaptured(PP); | |||
1193 | } else if (II->isStr("modules")) { | |||
1194 | struct ModuleVisitor { | |||
1195 | Preprocessor &PP; | |||
1196 | void visit(Module *M, bool VisibleOnly) { | |||
1197 | SourceLocation ImportLoc = PP.getModuleImportLoc(M); | |||
1198 | if (!VisibleOnly || ImportLoc.isValid()) { | |||
1199 | llvm::errs() << M->getFullModuleName() << " "; | |||
1200 | if (ImportLoc.isValid()) { | |||
1201 | llvm::errs() << M << " visible "; | |||
1202 | ImportLoc.print(llvm::errs(), PP.getSourceManager()); | |||
1203 | } | |||
1204 | llvm::errs() << "\n"; | |||
1205 | } | |||
1206 | for (Module *Sub : M->submodules()) { | |||
1207 | if (!VisibleOnly || ImportLoc.isInvalid() || Sub->IsExplicit) | |||
1208 | visit(Sub, VisibleOnly); | |||
1209 | } | |||
1210 | } | |||
1211 | void visitAll(bool VisibleOnly) { | |||
1212 | for (auto &NameAndMod : | |||
1213 | PP.getHeaderSearchInfo().getModuleMap().modules()) | |||
1214 | visit(NameAndMod.second, VisibleOnly); | |||
1215 | } | |||
1216 | } Visitor{PP}; | |||
1217 | ||||
1218 | Token Kind; | |||
1219 | PP.LexUnexpandedToken(Kind); | |||
1220 | auto *DumpII = Kind.getIdentifierInfo(); | |||
1221 | if (!DumpII) { | |||
1222 | PP.Diag(Kind, diag::warn_pragma_debug_missing_argument) | |||
1223 | << II->getName(); | |||
1224 | } else if (DumpII->isStr("all")) { | |||
1225 | Visitor.visitAll(false); | |||
1226 | } else if (DumpII->isStr("visible")) { | |||
1227 | Visitor.visitAll(true); | |||
1228 | } else if (DumpII->isStr("building")) { | |||
1229 | for (auto &Building : PP.getBuildingSubmodules()) { | |||
1230 | llvm::errs() << "in " << Building.M->getFullModuleName(); | |||
1231 | if (Building.ImportLoc.isValid()) { | |||
1232 | llvm::errs() << " imported "; | |||
1233 | if (Building.IsPragma) | |||
1234 | llvm::errs() << "via pragma "; | |||
1235 | llvm::errs() << "at "; | |||
1236 | Building.ImportLoc.print(llvm::errs(), PP.getSourceManager()); | |||
1237 | llvm::errs() << "\n"; | |||
1238 | } | |||
1239 | } | |||
1240 | } else { | |||
1241 | PP.Diag(Tok, diag::warn_pragma_debug_unexpected_command) | |||
1242 | << DumpII->getName(); | |||
1243 | } | |||
1244 | } else { | |||
1245 | PP.Diag(Tok, diag::warn_pragma_debug_unexpected_command) | |||
1246 | << II->getName(); | |||
1247 | } | |||
1248 | ||||
1249 | PPCallbacks *Callbacks = PP.getPPCallbacks(); | |||
1250 | if (Callbacks) | |||
1251 | Callbacks->PragmaDebug(Tok.getLocation(), II->getName()); | |||
1252 | } | |||
1253 | ||||
1254 | void HandleCaptured(Preprocessor &PP) { | |||
1255 | Token Tok; | |||
1256 | PP.LexUnexpandedToken(Tok); | |||
1257 | ||||
1258 | if (Tok.isNot(tok::eod)) { | |||
1259 | PP.Diag(Tok, diag::ext_pp_extra_tokens_at_eol) | |||
1260 | << "pragma clang __debug captured"; | |||
1261 | return; | |||
1262 | } | |||
1263 | ||||
1264 | SourceLocation NameLoc = Tok.getLocation(); | |||
1265 | MutableArrayRef<Token> Toks( | |||
1266 | PP.getPreprocessorAllocator().Allocate<Token>(1), 1); | |||
1267 | Toks[0].startToken(); | |||
1268 | Toks[0].setKind(tok::annot_pragma_captured); | |||
1269 | Toks[0].setLocation(NameLoc); | |||
1270 | ||||
1271 | PP.EnterTokenStream(Toks, /*DisableMacroExpansion=*/true, | |||
1272 | /*IsReinject=*/false); | |||
1273 | } | |||
1274 | ||||
1275 | // Disable MSVC warning about runtime stack overflow. | |||
1276 | #ifdef _MSC_VER | |||
1277 | #pragma warning(disable : 4717) | |||
1278 | #endif | |||
1279 | static void DebugOverflowStack(void (*P)() = nullptr) { | |||
1280 | void (*volatile Self)(void(*P)()) = DebugOverflowStack; | |||
1281 | Self(reinterpret_cast<void(*)()>(Self)); | |||
1282 | } | |||
1283 | #ifdef _MSC_VER | |||
1284 | #pragma warning(default : 4717) | |||
1285 | #endif | |||
1286 | }; | |||
1287 | ||||
1288 | /// PragmaDiagnosticHandler - e.g. '\#pragma GCC diagnostic ignored "-Wformat"' | |||
1289 | struct PragmaDiagnosticHandler : public PragmaHandler { | |||
1290 | private: | |||
1291 | const char *Namespace; | |||
1292 | ||||
1293 | public: | |||
1294 | explicit PragmaDiagnosticHandler(const char *NS) | |||
1295 | : PragmaHandler("diagnostic"), Namespace(NS) {} | |||
1296 | ||||
1297 | void HandlePragma(Preprocessor &PP, PragmaIntroducer Introducer, | |||
1298 | Token &DiagToken) override { | |||
1299 | SourceLocation DiagLoc = DiagToken.getLocation(); | |||
1300 | Token Tok; | |||
1301 | PP.LexUnexpandedToken(Tok); | |||
1302 | if (Tok.isNot(tok::identifier)) { | |||
1303 | PP.Diag(Tok, diag::warn_pragma_diagnostic_invalid); | |||
1304 | return; | |||
1305 | } | |||
1306 | IdentifierInfo *II = Tok.getIdentifierInfo(); | |||
1307 | PPCallbacks *Callbacks = PP.getPPCallbacks(); | |||
1308 | ||||
1309 | if (II->isStr("pop")) { | |||
1310 | if (!PP.getDiagnostics().popMappings(DiagLoc)) | |||
1311 | PP.Diag(Tok, diag::warn_pragma_diagnostic_cannot_pop); | |||
1312 | else if (Callbacks) | |||
1313 | Callbacks->PragmaDiagnosticPop(DiagLoc, Namespace); | |||
1314 | return; | |||
1315 | } else if (II->isStr("push")) { | |||
1316 | PP.getDiagnostics().pushMappings(DiagLoc); | |||
1317 | if (Callbacks) | |||
1318 | Callbacks->PragmaDiagnosticPush(DiagLoc, Namespace); | |||
1319 | return; | |||
1320 | } | |||
1321 | ||||
1322 | diag::Severity SV = llvm::StringSwitch<diag::Severity>(II->getName()) | |||
1323 | .Case("ignored", diag::Severity::Ignored) | |||
1324 | .Case("warning", diag::Severity::Warning) | |||
1325 | .Case("error", diag::Severity::Error) | |||
1326 | .Case("fatal", diag::Severity::Fatal) | |||
1327 | .Default(diag::Severity()); | |||
1328 | ||||
1329 | if (SV == diag::Severity()) { | |||
1330 | PP.Diag(Tok, diag::warn_pragma_diagnostic_invalid); | |||
1331 | return; | |||
1332 | } | |||
1333 | ||||
1334 | PP.LexUnexpandedToken(Tok); | |||
1335 | SourceLocation StringLoc = Tok.getLocation(); | |||
1336 | ||||
1337 | std::string WarningName; | |||
1338 | if (!PP.FinishLexStringLiteral(Tok, WarningName, "pragma diagnostic", | |||
1339 | /*AllowMacroExpansion=*/false)) | |||
1340 | return; | |||
1341 | ||||
1342 | if (Tok.isNot(tok::eod)) { | |||
1343 | PP.Diag(Tok.getLocation(), diag::warn_pragma_diagnostic_invalid_token); | |||
1344 | return; | |||
1345 | } | |||
1346 | ||||
1347 | if (WarningName.size() < 3 || WarningName[0] != '-' || | |||
1348 | (WarningName[1] != 'W' && WarningName[1] != 'R')) { | |||
1349 | PP.Diag(StringLoc, diag::warn_pragma_diagnostic_invalid_option); | |||
1350 | return; | |||
1351 | } | |||
1352 | ||||
1353 | diag::Flavor Flavor = WarningName[1] == 'W' ? diag::Flavor::WarningOrError | |||
1354 | : diag::Flavor::Remark; | |||
1355 | StringRef Group = StringRef(WarningName).substr(2); | |||
1356 | bool unknownDiag = false; | |||
1357 | if (Group == "everything") { | |||
1358 | // Special handling for pragma clang diagnostic ... "-Weverything". | |||
1359 | // There is no formal group named "everything", so there has to be a | |||
1360 | // special case for it. | |||
1361 | PP.getDiagnostics().setSeverityForAll(Flavor, SV, DiagLoc); | |||
1362 | } else | |||
1363 | unknownDiag = PP.getDiagnostics().setSeverityForGroup(Flavor, Group, SV, | |||
1364 | DiagLoc); | |||
1365 | if (unknownDiag) | |||
1366 | PP.Diag(StringLoc, diag::warn_pragma_diagnostic_unknown_warning) | |||
1367 | << WarningName; | |||
1368 | else if (Callbacks) | |||
1369 | Callbacks->PragmaDiagnostic(DiagLoc, Namespace, SV, WarningName); | |||
1370 | } | |||
1371 | }; | |||
1372 | ||||
1373 | /// "\#pragma hdrstop [<header-name-string>]" | |||
1374 | struct PragmaHdrstopHandler : public PragmaHandler { | |||
1375 | PragmaHdrstopHandler() : PragmaHandler("hdrstop") {} | |||
1376 | void HandlePragma(Preprocessor &PP, PragmaIntroducer Introducer, | |||
1377 | Token &DepToken) override { | |||
1378 | PP.HandlePragmaHdrstop(DepToken); | |||
1379 | } | |||
1380 | }; | |||
1381 | ||||
1382 | /// "\#pragma warning(...)". MSVC's diagnostics do not map cleanly to clang's | |||
1383 | /// diagnostics, so we don't really implement this pragma. We parse it and | |||
1384 | /// ignore it to avoid -Wunknown-pragma warnings. | |||
1385 | struct PragmaWarningHandler : public PragmaHandler { | |||
1386 | PragmaWarningHandler() : PragmaHandler("warning") {} | |||
1387 | ||||
1388 | void HandlePragma(Preprocessor &PP, PragmaIntroducer Introducer, | |||
1389 | Token &Tok) override { | |||
1390 | // Parse things like: | |||
1391 | // warning(push, 1) | |||
1392 | // warning(pop) | |||
1393 | // warning(disable : 1 2 3 ; error : 4 5 6 ; suppress : 7 8 9) | |||
1394 | SourceLocation DiagLoc = Tok.getLocation(); | |||
1395 | PPCallbacks *Callbacks = PP.getPPCallbacks(); | |||
1396 | ||||
1397 | PP.Lex(Tok); | |||
1398 | if (Tok.isNot(tok::l_paren)) { | |||
1399 | PP.Diag(Tok, diag::warn_pragma_warning_expected) << "("; | |||
1400 | return; | |||
1401 | } | |||
1402 | ||||
1403 | PP.Lex(Tok); | |||
1404 | IdentifierInfo *II = Tok.getIdentifierInfo(); | |||
1405 | ||||
1406 | if (II && II->isStr("push")) { | |||
1407 | // #pragma warning( push[ ,n ] ) | |||
1408 | int Level = -1; | |||
1409 | PP.Lex(Tok); | |||
1410 | if (Tok.is(tok::comma)) { | |||
1411 | PP.Lex(Tok); | |||
1412 | uint64_t Value; | |||
1413 | if (Tok.is(tok::numeric_constant) && | |||
1414 | PP.parseSimpleIntegerLiteral(Tok, Value)) | |||
1415 | Level = int(Value); | |||
1416 | if (Level < 0 || Level > 4) { | |||
1417 | PP.Diag(Tok, diag::warn_pragma_warning_push_level); | |||
1418 | return; | |||
1419 | } | |||
1420 | } | |||
1421 | PP.getDiagnostics().pushMappings(DiagLoc); | |||
1422 | if (Callbacks) | |||
1423 | Callbacks->PragmaWarningPush(DiagLoc, Level); | |||
1424 | } else if (II && II->isStr("pop")) { | |||
1425 | // #pragma warning( pop ) | |||
1426 | PP.Lex(Tok); | |||
1427 | if (!PP.getDiagnostics().popMappings(DiagLoc)) | |||
1428 | PP.Diag(Tok, diag::warn_pragma_diagnostic_cannot_pop); | |||
1429 | else if (Callbacks) | |||
1430 | Callbacks->PragmaWarningPop(DiagLoc); | |||
1431 | } else { | |||
1432 | // #pragma warning( warning-specifier : warning-number-list | |||
1433 | // [; warning-specifier : warning-number-list...] ) | |||
1434 | while (true) { | |||
1435 | II = Tok.getIdentifierInfo(); | |||
1436 | if (!II && !Tok.is(tok::numeric_constant)) { | |||
1437 | PP.Diag(Tok, diag::warn_pragma_warning_spec_invalid); | |||
1438 | return; | |||
1439 | } | |||
1440 | ||||
1441 | // Figure out which warning specifier this is. | |||
1442 | bool SpecifierValid; | |||
1443 | PPCallbacks::PragmaWarningSpecifier Specifier; | |||
1444 | if (II) { | |||
1445 | int SpecifierInt = llvm::StringSwitch<int>(II->getName()) | |||
1446 | .Case("default", PPCallbacks::PWS_Default) | |||
1447 | .Case("disable", PPCallbacks::PWS_Disable) | |||
1448 | .Case("error", PPCallbacks::PWS_Error) | |||
1449 | .Case("once", PPCallbacks::PWS_Once) | |||
1450 | .Case("suppress", PPCallbacks::PWS_Suppress) | |||
1451 | .Default(-1); | |||
1452 | if ((SpecifierValid = SpecifierInt != -1)) | |||
1453 | Specifier = | |||
1454 | static_cast<PPCallbacks::PragmaWarningSpecifier>(SpecifierInt); | |||
1455 | ||||
1456 | // If we read a correct specifier, snatch next token (that should be | |||
1457 | // ":", checked later). | |||
1458 | if (SpecifierValid) | |||
1459 | PP.Lex(Tok); | |||
1460 | } else { | |||
1461 | // Token is a numeric constant. It should be either 1, 2, 3 or 4. | |||
1462 | uint64_t Value; | |||
1463 | if (PP.parseSimpleIntegerLiteral(Tok, Value)) { | |||
1464 | if ((SpecifierValid = (Value >= 1) && (Value <= 4))) | |||
1465 | Specifier = static_cast<PPCallbacks::PragmaWarningSpecifier>( | |||
1466 | PPCallbacks::PWS_Level1 + Value - 1); | |||
1467 | } else | |||
1468 | SpecifierValid = false; | |||
1469 | // Next token already snatched by parseSimpleIntegerLiteral. | |||
1470 | } | |||
1471 | ||||
1472 | if (!SpecifierValid) { | |||
1473 | PP.Diag(Tok, diag::warn_pragma_warning_spec_invalid); | |||
1474 | return; | |||
1475 | } | |||
1476 | if (Tok.isNot(tok::colon)) { | |||
1477 | PP.Diag(Tok, diag::warn_pragma_warning_expected) << ":"; | |||
1478 | return; | |||
1479 | } | |||
1480 | ||||
1481 | // Collect the warning ids. | |||
1482 | SmallVector<int, 4> Ids; | |||
1483 | PP.Lex(Tok); | |||
1484 | while (Tok.is(tok::numeric_constant)) { | |||
1485 | uint64_t Value; | |||
1486 | if (!PP.parseSimpleIntegerLiteral(Tok, Value) || Value == 0 || | |||
1487 | Value > INT_MAX2147483647) { | |||
1488 | PP.Diag(Tok, diag::warn_pragma_warning_expected_number); | |||
1489 | return; | |||
1490 | } | |||
1491 | Ids.push_back(int(Value)); | |||
1492 | } | |||
1493 | ||||
1494 | // Only act on disable for now. | |||
1495 | diag::Severity SV = diag::Severity(); | |||
1496 | if (Specifier == PPCallbacks::PWS_Disable) | |||
1497 | SV = diag::Severity::Ignored; | |||
1498 | if (SV != diag::Severity()) | |||
1499 | for (int Id : Ids) { | |||
1500 | if (auto Group = diagGroupFromCLWarningID(Id)) { | |||
1501 | bool unknownDiag = PP.getDiagnostics().setSeverityForGroup( | |||
1502 | diag::Flavor::WarningOrError, *Group, SV, DiagLoc); | |||
1503 | assert(!unknownDiag &&(static_cast <bool> (!unknownDiag && "wd table should only contain known diags" ) ? void (0) : __assert_fail ("!unknownDiag && \"wd table should only contain known diags\"" , "clang/lib/Lex/Pragma.cpp", 1504, __extension__ __PRETTY_FUNCTION__ )) | |||
1504 | "wd table should only contain known diags")(static_cast <bool> (!unknownDiag && "wd table should only contain known diags" ) ? void (0) : __assert_fail ("!unknownDiag && \"wd table should only contain known diags\"" , "clang/lib/Lex/Pragma.cpp", 1504, __extension__ __PRETTY_FUNCTION__ )); | |||
1505 | (void)unknownDiag; | |||
1506 | } | |||
1507 | } | |||
1508 | ||||
1509 | if (Callbacks) | |||
1510 | Callbacks->PragmaWarning(DiagLoc, Specifier, Ids); | |||
1511 | ||||
1512 | // Parse the next specifier if there is a semicolon. | |||
1513 | if (Tok.isNot(tok::semi)) | |||
1514 | break; | |||
1515 | PP.Lex(Tok); | |||
1516 | } | |||
1517 | } | |||
1518 | ||||
1519 | if (Tok.isNot(tok::r_paren)) { | |||
1520 | PP.Diag(Tok, diag::warn_pragma_warning_expected) << ")"; | |||
1521 | return; | |||
1522 | } | |||
1523 | ||||
1524 | PP.Lex(Tok); | |||
1525 | if (Tok.isNot(tok::eod)) | |||
1526 | PP.Diag(Tok, diag::ext_pp_extra_tokens_at_eol) << "pragma warning"; | |||
1527 | } | |||
1528 | }; | |||
1529 | ||||
1530 | /// "\#pragma execution_character_set(...)". MSVC supports this pragma only | |||
1531 | /// for "UTF-8". We parse it and ignore it if UTF-8 is provided and warn | |||
1532 | /// otherwise to avoid -Wunknown-pragma warnings. | |||
1533 | struct PragmaExecCharsetHandler : public PragmaHandler { | |||
1534 | PragmaExecCharsetHandler() : PragmaHandler("execution_character_set") {} | |||
1535 | ||||
1536 | void HandlePragma(Preprocessor &PP, PragmaIntroducer Introducer, | |||
1537 | Token &Tok) override { | |||
1538 | // Parse things like: | |||
1539 | // execution_character_set(push, "UTF-8") | |||
1540 | // execution_character_set(pop) | |||
1541 | SourceLocation DiagLoc = Tok.getLocation(); | |||
1542 | PPCallbacks *Callbacks = PP.getPPCallbacks(); | |||
1543 | ||||
1544 | PP.Lex(Tok); | |||
1545 | if (Tok.isNot(tok::l_paren)) { | |||
1546 | PP.Diag(Tok, diag::warn_pragma_exec_charset_expected) << "("; | |||
1547 | return; | |||
1548 | } | |||
1549 | ||||
1550 | PP.Lex(Tok); | |||
1551 | IdentifierInfo *II = Tok.getIdentifierInfo(); | |||
1552 | ||||
1553 | if (II && II->isStr("push")) { | |||
1554 | // #pragma execution_character_set( push[ , string ] ) | |||
1555 | PP.Lex(Tok); | |||
1556 | if (Tok.is(tok::comma)) { | |||
1557 | PP.Lex(Tok); | |||
1558 | ||||
1559 | std::string ExecCharset; | |||
1560 | if (!PP.FinishLexStringLiteral(Tok, ExecCharset, | |||
1561 | "pragma execution_character_set", | |||
1562 | /*AllowMacroExpansion=*/false)) | |||
1563 | return; | |||
1564 | ||||
1565 | // MSVC supports either of these, but nothing else. | |||
1566 | if (ExecCharset != "UTF-8" && ExecCharset != "utf-8") { | |||
1567 | PP.Diag(Tok, diag::warn_pragma_exec_charset_push_invalid) << ExecCharset; | |||
1568 | return; | |||
1569 | } | |||
1570 | } | |||
1571 | if (Callbacks) | |||
1572 | Callbacks->PragmaExecCharsetPush(DiagLoc, "UTF-8"); | |||
1573 | } else if (II && II->isStr("pop")) { | |||
1574 | // #pragma execution_character_set( pop ) | |||
1575 | PP.Lex(Tok); | |||
1576 | if (Callbacks) | |||
1577 | Callbacks->PragmaExecCharsetPop(DiagLoc); | |||
1578 | } else { | |||
1579 | PP.Diag(Tok, diag::warn_pragma_exec_charset_spec_invalid); | |||
1580 | return; | |||
1581 | } | |||
1582 | ||||
1583 | if (Tok.isNot(tok::r_paren)) { | |||
1584 | PP.Diag(Tok, diag::warn_pragma_exec_charset_expected) << ")"; | |||
1585 | return; | |||
1586 | } | |||
1587 | ||||
1588 | PP.Lex(Tok); | |||
1589 | if (Tok.isNot(tok::eod)) | |||
1590 | PP.Diag(Tok, diag::ext_pp_extra_tokens_at_eol) << "pragma execution_character_set"; | |||
1591 | } | |||
1592 | }; | |||
1593 | ||||
1594 | /// PragmaIncludeAliasHandler - "\#pragma include_alias("...")". | |||
1595 | struct PragmaIncludeAliasHandler : public PragmaHandler { | |||
1596 | PragmaIncludeAliasHandler() : PragmaHandler("include_alias") {} | |||
1597 | ||||
1598 | void HandlePragma(Preprocessor &PP, PragmaIntroducer Introducer, | |||
1599 | Token &IncludeAliasTok) override { | |||
1600 | PP.HandlePragmaIncludeAlias(IncludeAliasTok); | |||
1601 | } | |||
1602 | }; | |||
1603 | ||||
1604 | /// PragmaMessageHandler - Handle the microsoft and gcc \#pragma message | |||
1605 | /// extension. The syntax is: | |||
1606 | /// \code | |||
1607 | /// #pragma message(string) | |||
1608 | /// \endcode | |||
1609 | /// OR, in GCC mode: | |||
1610 | /// \code | |||
1611 | /// #pragma message string | |||
1612 | /// \endcode | |||
1613 | /// string is a string, which is fully macro expanded, and permits string | |||
1614 | /// concatenation, embedded escape characters, etc... See MSDN for more details. | |||
1615 | /// Also handles \#pragma GCC warning and \#pragma GCC error which take the same | |||
1616 | /// form as \#pragma message. | |||
1617 | struct PragmaMessageHandler : public PragmaHandler { | |||
1618 | private: | |||
1619 | const PPCallbacks::PragmaMessageKind Kind; | |||
1620 | const StringRef Namespace; | |||
1621 | ||||
1622 | static const char* PragmaKind(PPCallbacks::PragmaMessageKind Kind, | |||
1623 | bool PragmaNameOnly = false) { | |||
1624 | switch (Kind) { | |||
1625 | case PPCallbacks::PMK_Message: | |||
1626 | return PragmaNameOnly ? "message" : "pragma message"; | |||
1627 | case PPCallbacks::PMK_Warning: | |||
1628 | return PragmaNameOnly ? "warning" : "pragma warning"; | |||
1629 | case PPCallbacks::PMK_Error: | |||
1630 | return PragmaNameOnly ? "error" : "pragma error"; | |||
1631 | } | |||
1632 | llvm_unreachable("Unknown PragmaMessageKind!")::llvm::llvm_unreachable_internal("Unknown PragmaMessageKind!" , "clang/lib/Lex/Pragma.cpp", 1632); | |||
1633 | } | |||
1634 | ||||
1635 | public: | |||
1636 | PragmaMessageHandler(PPCallbacks::PragmaMessageKind Kind, | |||
1637 | StringRef Namespace = StringRef()) | |||
1638 | : PragmaHandler(PragmaKind(Kind, true)), Kind(Kind), | |||
1639 | Namespace(Namespace) {} | |||
1640 | ||||
1641 | void HandlePragma(Preprocessor &PP, PragmaIntroducer Introducer, | |||
1642 | Token &Tok) override { | |||
1643 | SourceLocation MessageLoc = Tok.getLocation(); | |||
1644 | PP.Lex(Tok); | |||
1645 | bool ExpectClosingParen = false; | |||
1646 | switch (Tok.getKind()) { | |||
1647 | case tok::l_paren: | |||
1648 | // We have a MSVC style pragma message. | |||
1649 | ExpectClosingParen = true; | |||
1650 | // Read the string. | |||
1651 | PP.Lex(Tok); | |||
1652 | break; | |||
1653 | case tok::string_literal: | |||
1654 | // We have a GCC style pragma message, and we just read the string. | |||
1655 | break; | |||
1656 | default: | |||
1657 | PP.Diag(MessageLoc, diag::err_pragma_message_malformed) << Kind; | |||
1658 | return; | |||
1659 | } | |||
1660 | ||||
1661 | std::string MessageString; | |||
1662 | if (!PP.FinishLexStringLiteral(Tok, MessageString, PragmaKind(Kind), | |||
1663 | /*AllowMacroExpansion=*/true)) | |||
1664 | return; | |||
1665 | ||||
1666 | if (ExpectClosingParen) { | |||
1667 | if (Tok.isNot(tok::r_paren)) { | |||
1668 | PP.Diag(Tok.getLocation(), diag::err_pragma_message_malformed) << Kind; | |||
1669 | return; | |||
1670 | } | |||
1671 | PP.Lex(Tok); // eat the r_paren. | |||
1672 | } | |||
1673 | ||||
1674 | if (Tok.isNot(tok::eod)) { | |||
1675 | PP.Diag(Tok.getLocation(), diag::err_pragma_message_malformed) << Kind; | |||
1676 | return; | |||
1677 | } | |||
1678 | ||||
1679 | // Output the message. | |||
1680 | PP.Diag(MessageLoc, (Kind == PPCallbacks::PMK_Error) | |||
1681 | ? diag::err_pragma_message | |||
1682 | : diag::warn_pragma_message) << MessageString; | |||
1683 | ||||
1684 | // If the pragma is lexically sound, notify any interested PPCallbacks. | |||
1685 | if (PPCallbacks *Callbacks = PP.getPPCallbacks()) | |||
1686 | Callbacks->PragmaMessage(MessageLoc, Namespace, Kind, MessageString); | |||
1687 | } | |||
1688 | }; | |||
1689 | ||||
1690 | /// Handle the clang \#pragma module import extension. The syntax is: | |||
1691 | /// \code | |||
1692 | /// #pragma clang module import some.module.name | |||
1693 | /// \endcode | |||
1694 | struct PragmaModuleImportHandler : public PragmaHandler { | |||
1695 | PragmaModuleImportHandler() : PragmaHandler("import") {} | |||
1696 | ||||
1697 | void HandlePragma(Preprocessor &PP, PragmaIntroducer Introducer, | |||
1698 | Token &Tok) override { | |||
1699 | SourceLocation ImportLoc = Tok.getLocation(); | |||
1700 | ||||
1701 | // Read the module name. | |||
1702 | llvm::SmallVector<std::pair<IdentifierInfo *, SourceLocation>, 8> | |||
1703 | ModuleName; | |||
1704 | if (LexModuleName(PP, Tok, ModuleName)) | |||
1705 | return; | |||
1706 | ||||
1707 | if (Tok.isNot(tok::eod)) | |||
1708 | PP.Diag(Tok, diag::ext_pp_extra_tokens_at_eol) << "pragma"; | |||
1709 | ||||
1710 | // If we have a non-empty module path, load the named module. | |||
1711 | Module *Imported = | |||
1712 | PP.getModuleLoader().loadModule(ImportLoc, ModuleName, Module::Hidden, | |||
1713 | /*IsInclusionDirective=*/false); | |||
1714 | if (!Imported) | |||
1715 | return; | |||
1716 | ||||
1717 | PP.makeModuleVisible(Imported, ImportLoc); | |||
1718 | PP.EnterAnnotationToken(SourceRange(ImportLoc, ModuleName.back().second), | |||
1719 | tok::annot_module_include, Imported); | |||
1720 | if (auto *CB = PP.getPPCallbacks()) | |||
1721 | CB->moduleImport(ImportLoc, ModuleName, Imported); | |||
1722 | } | |||
1723 | }; | |||
1724 | ||||
1725 | /// Handle the clang \#pragma module begin extension. The syntax is: | |||
1726 | /// \code | |||
1727 | /// #pragma clang module begin some.module.name | |||
1728 | /// ... | |||
1729 | /// #pragma clang module end | |||
1730 | /// \endcode | |||
1731 | struct PragmaModuleBeginHandler : public PragmaHandler { | |||
1732 | PragmaModuleBeginHandler() : PragmaHandler("begin") {} | |||
1733 | ||||
1734 | void HandlePragma(Preprocessor &PP, PragmaIntroducer Introducer, | |||
1735 | Token &Tok) override { | |||
1736 | SourceLocation BeginLoc = Tok.getLocation(); | |||
1737 | ||||
1738 | // Read the module name. | |||
1739 | llvm::SmallVector<std::pair<IdentifierInfo *, SourceLocation>, 8> | |||
1740 | ModuleName; | |||
1741 | if (LexModuleName(PP, Tok, ModuleName)) | |||
1742 | return; | |||
1743 | ||||
1744 | if (Tok.isNot(tok::eod)) | |||
1745 | PP.Diag(Tok, diag::ext_pp_extra_tokens_at_eol) << "pragma"; | |||
1746 | ||||
1747 | // We can only enter submodules of the current module. | |||
1748 | StringRef Current = PP.getLangOpts().CurrentModule; | |||
1749 | if (ModuleName.front().first->getName() != Current) { | |||
1750 | PP.Diag(ModuleName.front().second, diag::err_pp_module_begin_wrong_module) | |||
1751 | << ModuleName.front().first << (ModuleName.size() > 1) | |||
1752 | << Current.empty() << Current; | |||
1753 | return; | |||
1754 | } | |||
1755 | ||||
1756 | // Find the module we're entering. We require that a module map for it | |||
1757 | // be loaded or implicitly loadable. | |||
1758 | auto &HSI = PP.getHeaderSearchInfo(); | |||
1759 | Module *M = HSI.lookupModule(Current, ModuleName.front().second); | |||
1760 | if (!M) { | |||
1761 | PP.Diag(ModuleName.front().second, | |||
1762 | diag::err_pp_module_begin_no_module_map) << Current; | |||
1763 | return; | |||
1764 | } | |||
1765 | for (unsigned I = 1; I != ModuleName.size(); ++I) { | |||
1766 | auto *NewM = M->findOrInferSubmodule(ModuleName[I].first->getName()); | |||
1767 | if (!NewM) { | |||
1768 | PP.Diag(ModuleName[I].second, diag::err_pp_module_begin_no_submodule) | |||
1769 | << M->getFullModuleName() << ModuleName[I].first; | |||
1770 | return; | |||
1771 | } | |||
1772 | M = NewM; | |||
1773 | } | |||
1774 | ||||
1775 | // If the module isn't available, it doesn't make sense to enter it. | |||
1776 | if (Preprocessor::checkModuleIsAvailable( | |||
1777 | PP.getLangOpts(), PP.getTargetInfo(), PP.getDiagnostics(), M)) { | |||
1778 | PP.Diag(BeginLoc, diag::note_pp_module_begin_here) | |||
1779 | << M->getTopLevelModuleName(); | |||
1780 | return; | |||
1781 | } | |||
1782 | ||||
1783 | // Enter the scope of the submodule. | |||
1784 | PP.EnterSubmodule(M, BeginLoc, /*ForPragma*/true); | |||
1785 | PP.EnterAnnotationToken(SourceRange(BeginLoc, ModuleName.back().second), | |||
1786 | tok::annot_module_begin, M); | |||
1787 | } | |||
1788 | }; | |||
1789 | ||||
1790 | /// Handle the clang \#pragma module end extension. | |||
1791 | struct PragmaModuleEndHandler : public PragmaHandler { | |||
1792 | PragmaModuleEndHandler() : PragmaHandler("end") {} | |||
1793 | ||||
1794 | void HandlePragma(Preprocessor &PP, PragmaIntroducer Introducer, | |||
1795 | Token &Tok) override { | |||
1796 | SourceLocation Loc = Tok.getLocation(); | |||
1797 | ||||
1798 | PP.LexUnexpandedToken(Tok); | |||
1799 | if (Tok.isNot(tok::eod)) | |||
1800 | PP.Diag(Tok, diag::ext_pp_extra_tokens_at_eol) << "pragma"; | |||
1801 | ||||
1802 | Module *M = PP.LeaveSubmodule(/*ForPragma*/true); | |||
1803 | if (M) | |||
1804 | PP.EnterAnnotationToken(SourceRange(Loc), tok::annot_module_end, M); | |||
1805 | else | |||
1806 | PP.Diag(Loc, diag::err_pp_module_end_without_module_begin); | |||
1807 | } | |||
1808 | }; | |||
1809 | ||||
1810 | /// Handle the clang \#pragma module build extension. | |||
1811 | struct PragmaModuleBuildHandler : public PragmaHandler { | |||
1812 | PragmaModuleBuildHandler() : PragmaHandler("build") {} | |||
1813 | ||||
1814 | void HandlePragma(Preprocessor &PP, PragmaIntroducer Introducer, | |||
1815 | Token &Tok) override { | |||
1816 | PP.HandlePragmaModuleBuild(Tok); | |||
1817 | } | |||
1818 | }; | |||
1819 | ||||
1820 | /// Handle the clang \#pragma module load extension. | |||
1821 | struct PragmaModuleLoadHandler : public PragmaHandler { | |||
1822 | PragmaModuleLoadHandler() : PragmaHandler("load") {} | |||
1823 | ||||
1824 | void HandlePragma(Preprocessor &PP, PragmaIntroducer Introducer, | |||
1825 | Token &Tok) override { | |||
1826 | SourceLocation Loc = Tok.getLocation(); | |||
1827 | ||||
1828 | // Read the module name. | |||
1829 | llvm::SmallVector<std::pair<IdentifierInfo *, SourceLocation>, 8> | |||
1830 | ModuleName; | |||
1831 | if (LexModuleName(PP, Tok, ModuleName)) | |||
1832 | return; | |||
1833 | ||||
1834 | if (Tok.isNot(tok::eod)) | |||
1835 | PP.Diag(Tok, diag::ext_pp_extra_tokens_at_eol) << "pragma"; | |||
1836 | ||||
1837 | // Load the module, don't make it visible. | |||
1838 | PP.getModuleLoader().loadModule(Loc, ModuleName, Module::Hidden, | |||
1839 | /*IsInclusionDirective=*/false); | |||
1840 | } | |||
1841 | }; | |||
1842 | ||||
1843 | /// PragmaPushMacroHandler - "\#pragma push_macro" saves the value of the | |||
1844 | /// macro on the top of the stack. | |||
1845 | struct PragmaPushMacroHandler : public PragmaHandler { | |||
1846 | PragmaPushMacroHandler() : PragmaHandler("push_macro") {} | |||
1847 | ||||
1848 | void HandlePragma(Preprocessor &PP, PragmaIntroducer Introducer, | |||
1849 | Token &PushMacroTok) override { | |||
1850 | PP.HandlePragmaPushMacro(PushMacroTok); | |||
1851 | } | |||
1852 | }; | |||
1853 | ||||
1854 | /// PragmaPopMacroHandler - "\#pragma pop_macro" sets the value of the | |||
1855 | /// macro to the value on the top of the stack. | |||
1856 | struct PragmaPopMacroHandler : public PragmaHandler { | |||
1857 | PragmaPopMacroHandler() : PragmaHandler("pop_macro") {} | |||
1858 | ||||
1859 | void HandlePragma(Preprocessor &PP, PragmaIntroducer Introducer, | |||
1860 | Token &PopMacroTok) override { | |||
1861 | PP.HandlePragmaPopMacro(PopMacroTok); | |||
1862 | } | |||
1863 | }; | |||
1864 | ||||
1865 | /// PragmaARCCFCodeAuditedHandler - | |||
1866 | /// \#pragma clang arc_cf_code_audited begin/end | |||
1867 | struct PragmaARCCFCodeAuditedHandler : public PragmaHandler { | |||
1868 | PragmaARCCFCodeAuditedHandler() : PragmaHandler("arc_cf_code_audited") {} | |||
1869 | ||||
1870 | void HandlePragma(Preprocessor &PP, PragmaIntroducer Introducer, | |||
1871 | Token &NameTok) override { | |||
1872 | SourceLocation Loc = NameTok.getLocation(); | |||
1873 | bool IsBegin; | |||
1874 | ||||
1875 | Token Tok; | |||
1876 | ||||
1877 | // Lex the 'begin' or 'end'. | |||
1878 | PP.LexUnexpandedToken(Tok); | |||
1879 | const IdentifierInfo *BeginEnd = Tok.getIdentifierInfo(); | |||
1880 | if (BeginEnd && BeginEnd->isStr("begin")) { | |||
1881 | IsBegin = true; | |||
1882 | } else if (BeginEnd && BeginEnd->isStr("end")) { | |||
1883 | IsBegin = false; | |||
1884 | } else { | |||
1885 | PP.Diag(Tok.getLocation(), diag::err_pp_arc_cf_code_audited_syntax); | |||
1886 | return; | |||
1887 | } | |||
1888 | ||||
1889 | // Verify that this is followed by EOD. | |||
1890 | PP.LexUnexpandedToken(Tok); | |||
1891 | if (Tok.isNot(tok::eod)) | |||
1892 | PP.Diag(Tok, diag::ext_pp_extra_tokens_at_eol) << "pragma"; | |||
1893 | ||||
1894 | // The start location of the active audit. | |||
1895 | SourceLocation BeginLoc = PP.getPragmaARCCFCodeAuditedInfo().second; | |||
1896 | ||||
1897 | // The start location we want after processing this. | |||
1898 | SourceLocation NewLoc; | |||
1899 | ||||
1900 | if (IsBegin) { | |||
1901 | // Complain about attempts to re-enter an audit. | |||
1902 | if (BeginLoc.isValid()) { | |||
1903 | PP.Diag(Loc, diag::err_pp_double_begin_of_arc_cf_code_audited); | |||
1904 | PP.Diag(BeginLoc, diag::note_pragma_entered_here); | |||
1905 | } | |||
1906 | NewLoc = Loc; | |||
1907 | } else { | |||
1908 | // Complain about attempts to leave an audit that doesn't exist. | |||
1909 | if (!BeginLoc.isValid()) { | |||
1910 | PP.Diag(Loc, diag::err_pp_unmatched_end_of_arc_cf_code_audited); | |||
1911 | return; | |||
1912 | } | |||
1913 | NewLoc = SourceLocation(); | |||
1914 | } | |||
1915 | ||||
1916 | PP.setPragmaARCCFCodeAuditedInfo(NameTok.getIdentifierInfo(), NewLoc); | |||
1917 | } | |||
1918 | }; | |||
1919 | ||||
1920 | /// PragmaAssumeNonNullHandler - | |||
1921 | /// \#pragma clang assume_nonnull begin/end | |||
1922 | struct PragmaAssumeNonNullHandler : public PragmaHandler { | |||
1923 | PragmaAssumeNonNullHandler() : PragmaHandler("assume_nonnull") {} | |||
1924 | ||||
1925 | void HandlePragma(Preprocessor &PP, PragmaIntroducer Introducer, | |||
1926 | Token &NameTok) override { | |||
1927 | SourceLocation Loc = NameTok.getLocation(); | |||
1928 | bool IsBegin; | |||
1929 | ||||
1930 | Token Tok; | |||
1931 | ||||
1932 | // Lex the 'begin' or 'end'. | |||
1933 | PP.LexUnexpandedToken(Tok); | |||
1934 | const IdentifierInfo *BeginEnd = Tok.getIdentifierInfo(); | |||
1935 | if (BeginEnd && BeginEnd->isStr("begin")) { | |||
1936 | IsBegin = true; | |||
1937 | } else if (BeginEnd && BeginEnd->isStr("end")) { | |||
1938 | IsBegin = false; | |||
1939 | } else { | |||
1940 | PP.Diag(Tok.getLocation(), diag::err_pp_assume_nonnull_syntax); | |||
1941 | return; | |||
1942 | } | |||
1943 | ||||
1944 | // Verify that this is followed by EOD. | |||
1945 | PP.LexUnexpandedToken(Tok); | |||
1946 | if (Tok.isNot(tok::eod)) | |||
1947 | PP.Diag(Tok, diag::ext_pp_extra_tokens_at_eol) << "pragma"; | |||
1948 | ||||
1949 | // The start location of the active audit. | |||
1950 | SourceLocation BeginLoc = PP.getPragmaAssumeNonNullLoc(); | |||
1951 | ||||
1952 | // The start location we want after processing this. | |||
1953 | SourceLocation NewLoc; | |||
1954 | PPCallbacks *Callbacks = PP.getPPCallbacks(); | |||
1955 | ||||
1956 | if (IsBegin) { | |||
1957 | // Complain about attempts to re-enter an audit. | |||
1958 | if (BeginLoc.isValid()) { | |||
1959 | PP.Diag(Loc, diag::err_pp_double_begin_of_assume_nonnull); | |||
1960 | PP.Diag(BeginLoc, diag::note_pragma_entered_here); | |||
1961 | } | |||
1962 | NewLoc = Loc; | |||
1963 | if (Callbacks) | |||
1964 | Callbacks->PragmaAssumeNonNullBegin(NewLoc); | |||
1965 | } else { | |||
1966 | // Complain about attempts to leave an audit that doesn't exist. | |||
1967 | if (!BeginLoc.isValid()) { | |||
1968 | PP.Diag(Loc, diag::err_pp_unmatched_end_of_assume_nonnull); | |||
1969 | return; | |||
1970 | } | |||
1971 | NewLoc = SourceLocation(); | |||
1972 | if (Callbacks) | |||
1973 | Callbacks->PragmaAssumeNonNullEnd(NewLoc); | |||
1974 | } | |||
1975 | ||||
1976 | PP.setPragmaAssumeNonNullLoc(NewLoc); | |||
1977 | } | |||
1978 | }; | |||
1979 | ||||
1980 | /// Handle "\#pragma region [...]" | |||
1981 | /// | |||
1982 | /// The syntax is | |||
1983 | /// \code | |||
1984 | /// #pragma region [optional name] | |||
1985 | /// #pragma endregion [optional comment] | |||
1986 | /// \endcode | |||
1987 | /// | |||
1988 | /// \note This is | |||
1989 | /// <a href="http://msdn.microsoft.com/en-us/library/b6xkz944(v=vs.80).aspx">editor-only</a> | |||
1990 | /// pragma, just skipped by compiler. | |||
1991 | struct PragmaRegionHandler : public PragmaHandler { | |||
1992 | PragmaRegionHandler(const char *pragma) : PragmaHandler(pragma) {} | |||
1993 | ||||
1994 | void HandlePragma(Preprocessor &PP, PragmaIntroducer Introducer, | |||
1995 | Token &NameTok) override { | |||
1996 | // #pragma region: endregion matches can be verified | |||
1997 | // __pragma(region): no sense, but ignored by msvc | |||
1998 | // _Pragma is not valid for MSVC, but there isn't any point | |||
1999 | // to handle a _Pragma differently. | |||
2000 | } | |||
2001 | }; | |||
2002 | ||||
2003 | /// This handles parsing pragmas that take a macro name and optional message | |||
2004 | static IdentifierInfo *HandleMacroAnnotationPragma(Preprocessor &PP, Token &Tok, | |||
2005 | const char *Pragma, | |||
2006 | std::string &MessageString) { | |||
2007 | std::string Macro; | |||
2008 | ||||
2009 | PP.Lex(Tok); | |||
2010 | if (Tok.isNot(tok::l_paren)) { | |||
2011 | PP.Diag(Tok, diag::err_expected) << "("; | |||
2012 | return nullptr; | |||
2013 | } | |||
2014 | ||||
2015 | PP.LexUnexpandedToken(Tok); | |||
2016 | if (!Tok.is(tok::identifier)) { | |||
2017 | PP.Diag(Tok, diag::err_expected) << tok::identifier; | |||
2018 | return nullptr; | |||
2019 | } | |||
2020 | IdentifierInfo *II = Tok.getIdentifierInfo(); | |||
2021 | ||||
2022 | if (!II->hasMacroDefinition()) { | |||
2023 | PP.Diag(Tok, diag::err_pp_visibility_non_macro) << II; | |||
2024 | return nullptr; | |||
2025 | } | |||
2026 | ||||
2027 | PP.Lex(Tok); | |||
2028 | if (Tok.is(tok::comma)) { | |||
2029 | PP.Lex(Tok); | |||
2030 | if (!PP.FinishLexStringLiteral(Tok, MessageString, Pragma, | |||
2031 | /*AllowMacroExpansion=*/true)) | |||
2032 | return nullptr; | |||
2033 | } | |||
2034 | ||||
2035 | if (Tok.isNot(tok::r_paren)) { | |||
2036 | PP.Diag(Tok, diag::err_expected) << ")"; | |||
2037 | return nullptr; | |||
2038 | } | |||
2039 | return II; | |||
2040 | } | |||
2041 | ||||
2042 | /// "\#pragma clang deprecated(...)" | |||
2043 | /// | |||
2044 | /// The syntax is | |||
2045 | /// \code | |||
2046 | /// #pragma clang deprecate(MACRO_NAME [, Message]) | |||
2047 | /// \endcode | |||
2048 | struct PragmaDeprecatedHandler : public PragmaHandler { | |||
2049 | PragmaDeprecatedHandler() : PragmaHandler("deprecated") {} | |||
2050 | ||||
2051 | void HandlePragma(Preprocessor &PP, PragmaIntroducer Introducer, | |||
2052 | Token &Tok) override { | |||
2053 | std::string MessageString; | |||
2054 | ||||
2055 | if (IdentifierInfo *II = HandleMacroAnnotationPragma( | |||
2056 | PP, Tok, "#pragma clang deprecated", MessageString)) { | |||
2057 | II->setIsDeprecatedMacro(true); | |||
2058 | PP.addMacroDeprecationMsg(II, std::move(MessageString), | |||
2059 | Tok.getLocation()); | |||
2060 | } | |||
2061 | } | |||
2062 | }; | |||
2063 | ||||
2064 | /// "\#pragma clang restrict_expansion(...)" | |||
2065 | /// | |||
2066 | /// The syntax is | |||
2067 | /// \code | |||
2068 | /// #pragma clang restrict_expansion(MACRO_NAME [, Message]) | |||
2069 | /// \endcode | |||
2070 | struct PragmaRestrictExpansionHandler : public PragmaHandler { | |||
2071 | PragmaRestrictExpansionHandler() : PragmaHandler("restrict_expansion") {} | |||
2072 | ||||
2073 | void HandlePragma(Preprocessor &PP, PragmaIntroducer Introducer, | |||
2074 | Token &Tok) override { | |||
2075 | std::string MessageString; | |||
2076 | ||||
2077 | if (IdentifierInfo *II = HandleMacroAnnotationPragma( | |||
2078 | PP, Tok, "#pragma clang restrict_expansion", MessageString)) { | |||
2079 | II->setIsRestrictExpansion(true); | |||
2080 | PP.addRestrictExpansionMsg(II, std::move(MessageString), | |||
2081 | Tok.getLocation()); | |||
2082 | } | |||
2083 | } | |||
2084 | }; | |||
2085 | ||||
2086 | /// "\#pragma clang final(...)" | |||
2087 | /// | |||
2088 | /// The syntax is | |||
2089 | /// \code | |||
2090 | /// #pragma clang final(MACRO_NAME) | |||
2091 | /// \endcode | |||
2092 | struct PragmaFinalHandler : public PragmaHandler { | |||
2093 | PragmaFinalHandler() : PragmaHandler("final") {} | |||
2094 | ||||
2095 | void HandlePragma(Preprocessor &PP, PragmaIntroducer Introducer, | |||
2096 | Token &Tok) override { | |||
2097 | std::string Macro; | |||
2098 | ||||
2099 | PP.Lex(Tok); | |||
2100 | if (Tok.isNot(tok::l_paren)) { | |||
2101 | PP.Diag(Tok, diag::err_expected) << "("; | |||
2102 | return; | |||
2103 | } | |||
2104 | ||||
2105 | PP.LexUnexpandedToken(Tok); | |||
2106 | if (!Tok.is(tok::identifier)) { | |||
2107 | PP.Diag(Tok, diag::err_expected) << tok::identifier; | |||
2108 | return; | |||
2109 | } | |||
2110 | IdentifierInfo *II = Tok.getIdentifierInfo(); | |||
2111 | ||||
2112 | if (!II->hasMacroDefinition()) { | |||
2113 | PP.Diag(Tok, diag::err_pp_visibility_non_macro) << II; | |||
2114 | return; | |||
2115 | } | |||
2116 | ||||
2117 | PP.Lex(Tok); | |||
2118 | if (Tok.isNot(tok::r_paren)) { | |||
2119 | PP.Diag(Tok, diag::err_expected) << ")"; | |||
2120 | return; | |||
2121 | } | |||
2122 | II->setIsFinal(true); | |||
2123 | PP.addFinalLoc(II, Tok.getLocation()); | |||
2124 | } | |||
2125 | }; | |||
2126 | ||||
2127 | } // namespace | |||
2128 | ||||
2129 | /// RegisterBuiltinPragmas - Install the standard preprocessor pragmas: | |||
2130 | /// \#pragma GCC poison/system_header/dependency and \#pragma once. | |||
2131 | void Preprocessor::RegisterBuiltinPragmas() { | |||
2132 | AddPragmaHandler(new PragmaOnceHandler()); | |||
2133 | AddPragmaHandler(new PragmaMarkHandler()); | |||
2134 | AddPragmaHandler(new PragmaPushMacroHandler()); | |||
2135 | AddPragmaHandler(new PragmaPopMacroHandler()); | |||
2136 | AddPragmaHandler(new PragmaMessageHandler(PPCallbacks::PMK_Message)); | |||
2137 | ||||
2138 | // #pragma GCC ... | |||
2139 | AddPragmaHandler("GCC", new PragmaPoisonHandler()); | |||
2140 | AddPragmaHandler("GCC", new PragmaSystemHeaderHandler()); | |||
2141 | AddPragmaHandler("GCC", new PragmaDependencyHandler()); | |||
2142 | AddPragmaHandler("GCC", new PragmaDiagnosticHandler("GCC")); | |||
2143 | AddPragmaHandler("GCC", new PragmaMessageHandler(PPCallbacks::PMK_Warning, | |||
2144 | "GCC")); | |||
2145 | AddPragmaHandler("GCC", new PragmaMessageHandler(PPCallbacks::PMK_Error, | |||
2146 | "GCC")); | |||
2147 | // #pragma clang ... | |||
2148 | AddPragmaHandler("clang", new PragmaPoisonHandler()); | |||
2149 | AddPragmaHandler("clang", new PragmaSystemHeaderHandler()); | |||
2150 | AddPragmaHandler("clang", new PragmaIncludeInsteadHandler()); | |||
2151 | AddPragmaHandler("clang", new PragmaDebugHandler()); | |||
2152 | AddPragmaHandler("clang", new PragmaDependencyHandler()); | |||
2153 | AddPragmaHandler("clang", new PragmaDiagnosticHandler("clang")); | |||
2154 | AddPragmaHandler("clang", new PragmaARCCFCodeAuditedHandler()); | |||
2155 | AddPragmaHandler("clang", new PragmaAssumeNonNullHandler()); | |||
2156 | AddPragmaHandler("clang", new PragmaDeprecatedHandler()); | |||
2157 | AddPragmaHandler("clang", new PragmaRestrictExpansionHandler()); | |||
2158 | AddPragmaHandler("clang", new PragmaFinalHandler()); | |||
2159 | ||||
2160 | // #pragma clang module ... | |||
2161 | auto *ModuleHandler = new PragmaNamespace("module"); | |||
2162 | AddPragmaHandler("clang", ModuleHandler); | |||
2163 | ModuleHandler->AddPragma(new PragmaModuleImportHandler()); | |||
2164 | ModuleHandler->AddPragma(new PragmaModuleBeginHandler()); | |||
2165 | ModuleHandler->AddPragma(new PragmaModuleEndHandler()); | |||
2166 | ModuleHandler->AddPragma(new PragmaModuleBuildHandler()); | |||
2167 | ModuleHandler->AddPragma(new PragmaModuleLoadHandler()); | |||
2168 | ||||
2169 | // Add region pragmas. | |||
2170 | AddPragmaHandler(new PragmaRegionHandler("region")); | |||
2171 | AddPragmaHandler(new PragmaRegionHandler("endregion")); | |||
2172 | ||||
2173 | // MS extensions. | |||
2174 | if (LangOpts.MicrosoftExt) { | |||
2175 | AddPragmaHandler(new PragmaWarningHandler()); | |||
2176 | AddPragmaHandler(new PragmaExecCharsetHandler()); | |||
2177 | AddPragmaHandler(new PragmaIncludeAliasHandler()); | |||
2178 | AddPragmaHandler(new PragmaHdrstopHandler()); | |||
2179 | AddPragmaHandler(new PragmaSystemHeaderHandler()); | |||
2180 | } | |||
2181 | ||||
2182 | // Pragmas added by plugins | |||
2183 | for (const PragmaHandlerRegistry::entry &handler : | |||
2184 | PragmaHandlerRegistry::entries()) { | |||
2185 | AddPragmaHandler(handler.instantiate().release()); | |||
2186 | } | |||
2187 | } | |||
2188 | ||||
2189 | /// Ignore all pragmas, useful for modes such as -Eonly which would otherwise | |||
2190 | /// warn about those pragmas being unknown. | |||
2191 | void Preprocessor::IgnorePragmas() { | |||
2192 | AddPragmaHandler(new EmptyPragmaHandler()); | |||
2193 | // Also ignore all pragmas in all namespaces created | |||
2194 | // in Preprocessor::RegisterBuiltinPragmas(). | |||
2195 | AddPragmaHandler("GCC", new EmptyPragmaHandler()); | |||
2196 | AddPragmaHandler("clang", new EmptyPragmaHandler()); | |||
2197 | } |