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Diffstat (limited to 'lib/Lex/Pragma.cpp')
-rw-r--r--lib/Lex/Pragma.cpp170
1 files changed, 99 insertions, 71 deletions
diff --git a/lib/Lex/Pragma.cpp b/lib/Lex/Pragma.cpp
index bb0b71e226823..8b46f716910c9 100644
--- a/lib/Lex/Pragma.cpp
+++ b/lib/Lex/Pragma.cpp
@@ -44,9 +44,9 @@ PragmaHandler *PragmaNamespace::FindHandler(const IdentifierInfo *Name,
bool IgnoreNull) const {
PragmaHandler *NullHandler = 0;
for (unsigned i = 0, e = Handlers.size(); i != e; ++i) {
- if (Handlers[i]->getName() == Name)
+ if (Handlers[i]->getName() == Name)
return Handlers[i];
-
+
if (Handlers[i]->getName() == 0)
NullHandler = Handlers[i];
}
@@ -68,14 +68,14 @@ void PragmaNamespace::HandlePragma(Preprocessor &PP, Token &Tok) {
// Read the 'namespace' that the directive is in, e.g. STDC. Do not macro
// expand it, the user can have a STDC #define, that should not affect this.
PP.LexUnexpandedToken(Tok);
-
+
// Get the handler for this token. If there is no handler, ignore the pragma.
PragmaHandler *Handler = FindHandler(Tok.getIdentifierInfo(), false);
if (Handler == 0) {
PP.Diag(Tok, diag::warn_pragma_ignored);
return;
}
-
+
// Otherwise, pass it down.
Handler->HandlePragma(PP, Tok);
}
@@ -88,11 +88,11 @@ void PragmaNamespace::HandlePragma(Preprocessor &PP, Token &Tok) {
/// rest of the pragma, passing it to the registered pragma handlers.
void Preprocessor::HandlePragmaDirective() {
++NumPragma;
-
+
// Invoke the first level of pragma handlers which reads the namespace id.
Token Tok;
PragmaHandlers->HandlePragma(*this, Tok);
-
+
// If the pragma handler didn't read the rest of the line, consume it now.
if (CurPPLexer && CurPPLexer->ParsingPreprocessorDirective)
DiscardUntilEndOfDirective();
@@ -104,7 +104,7 @@ void Preprocessor::HandlePragmaDirective() {
void Preprocessor::Handle_Pragma(Token &Tok) {
// Remember the pragma token location.
SourceLocation PragmaLoc = Tok.getLocation();
-
+
// Read the '('.
Lex(Tok);
if (Tok.isNot(tok::l_paren)) {
@@ -118,7 +118,7 @@ void Preprocessor::Handle_Pragma(Token &Tok) {
Diag(PragmaLoc, diag::err__Pragma_malformed);
return;
}
-
+
// Remember the string.
std::string StrVal = getSpelling(Tok);
@@ -128,9 +128,9 @@ void Preprocessor::Handle_Pragma(Token &Tok) {
Diag(PragmaLoc, diag::err__Pragma_malformed);
return;
}
-
+
SourceLocation RParenLoc = Tok.getLocation();
-
+
// The _Pragma is lexically sound. Destringize according to C99 6.10.9.1:
// "The string literal is destringized by deleting the L prefix, if present,
// deleting the leading and trailing double-quotes, replacing each escape
@@ -140,14 +140,14 @@ void Preprocessor::Handle_Pragma(Token &Tok) {
StrVal.erase(StrVal.begin());
assert(StrVal[0] == '"' && StrVal[StrVal.size()-1] == '"' &&
"Invalid string token!");
-
+
// Remove the front quote, replacing it with a space, so that the pragma
// contents appear to have a space before them.
StrVal[0] = ' ';
-
+
// Replace the terminating quote with a \n.
StrVal[StrVal.size()-1] = '\n';
-
+
// Remove escaped quotes and escapes.
for (unsigned i = 0, e = StrVal.size(); i != e-1; ++i) {
if (StrVal[i] == '\\' &&
@@ -157,7 +157,7 @@ void Preprocessor::Handle_Pragma(Token &Tok) {
--e;
}
}
-
+
// Plop the string (including the newline and trailing null) into a buffer
// where we can lex it.
Token TmpTok;
@@ -174,7 +174,7 @@ void Preprocessor::Handle_Pragma(Token &Tok) {
// With everything set up, lex this as a #pragma directive.
HandlePragmaDirective();
-
+
// Finally, return whatever came after the pragma directive.
return Lex(Tok);
}
@@ -188,7 +188,7 @@ void Preprocessor::HandlePragmaOnce(Token &OnceTok) {
Diag(OnceTok, diag::pp_pragma_once_in_main_file);
return;
}
-
+
// Get the current file lexer we're looking at. Ignore _Pragma 'files' etc.
// Mark the file as a once-only file now.
HeaderInfo.MarkFileIncludeOnce(getCurrentFileLexer()->getFileEntry());
@@ -217,27 +217,27 @@ void Preprocessor::HandlePragmaPoison(Token &PoisonTok) {
if (CurPPLexer) CurPPLexer->LexingRawMode = true;
LexUnexpandedToken(Tok);
if (CurPPLexer) CurPPLexer->LexingRawMode = false;
-
+
// If we reached the end of line, we're done.
if (Tok.is(tok::eom)) return;
-
+
// Can only poison identifiers.
if (Tok.isNot(tok::identifier)) {
Diag(Tok, diag::err_pp_invalid_poison);
return;
}
-
+
// Look up the identifier info for the token. We disabled identifier lookup
// by saying we're skipping contents, so we need to do this manually.
IdentifierInfo *II = LookUpIdentifierInfo(Tok);
-
+
// Already poisoned.
if (II->isPoisoned()) continue;
-
+
// If this is a macro identifier, emit a warning.
if (II->hasMacroDefinition())
Diag(Tok, diag::pp_poisoning_existing_macro);
-
+
// Finally, poison it!
II->setIsPoisoned();
}
@@ -250,25 +250,25 @@ void Preprocessor::HandlePragmaSystemHeader(Token &SysHeaderTok) {
Diag(SysHeaderTok, diag::pp_pragma_sysheader_in_main_file);
return;
}
-
+
// Get the current file lexer we're looking at. Ignore _Pragma 'files' etc.
PreprocessorLexer *TheLexer = getCurrentFileLexer();
-
+
// Mark the file as a system header.
HeaderInfo.MarkFileSystemHeader(TheLexer->getFileEntry());
-
-
+
+
PresumedLoc PLoc = SourceMgr.getPresumedLoc(SysHeaderTok.getLocation());
unsigned FilenameLen = strlen(PLoc.getFilename());
unsigned FilenameID = SourceMgr.getLineTableFilenameID(PLoc.getFilename(),
FilenameLen);
-
+
// Emit a line marker. This will change any source locations from this point
// forward to realize they are in a system header.
// Create a line note with this information.
SourceMgr.AddLineNote(SysHeaderTok.getLocation(), PLoc.getLine(), FilenameID,
false, false, true, false);
-
+
// Notify the client, if desired, that we are in a new source file.
if (Callbacks)
Callbacks->FileChanged(SysHeaderTok.getLocation(),
@@ -284,11 +284,11 @@ void Preprocessor::HandlePragmaDependency(Token &DependencyTok) {
// If the token kind is EOM, the error has already been diagnosed.
if (FilenameTok.is(tok::eom))
return;
-
+
// Reserve a buffer to get the spelling.
llvm::SmallVector<char, 128> FilenameBuffer;
FilenameBuffer.resize(FilenameTok.getLength());
-
+
const char *FilenameStart = &FilenameBuffer[0];
unsigned Len = getSpelling(FilenameTok, FilenameStart);
const char *FilenameEnd = FilenameStart+Len;
@@ -298,7 +298,7 @@ void Preprocessor::HandlePragmaDependency(Token &DependencyTok) {
// error.
if (FilenameStart == 0)
return;
-
+
// Search include directories for this file.
const DirectoryLookup *CurDir;
const FileEntry *File = LookupFile(FilenameStart, FilenameEnd,
@@ -308,7 +308,7 @@ void Preprocessor::HandlePragmaDependency(Token &DependencyTok) {
<< std::string(FilenameStart, FilenameEnd);
return;
}
-
+
const FileEntry *CurFile = getCurrentFileLexer()->getFileEntry();
// If this file is older than the file it depends on, emit a diagnostic.
@@ -320,7 +320,7 @@ void Preprocessor::HandlePragmaDependency(Token &DependencyTok) {
Message += getSpelling(DependencyTok) + " ";
Lex(DependencyTok);
}
-
+
Message.erase(Message.end()-1);
Diag(FilenameTok, diag::pp_out_of_date_dependency) << Message;
}
@@ -339,23 +339,23 @@ void Preprocessor::HandlePragmaComment(Token &Tok) {
Diag(CommentLoc, diag::err_pragma_comment_malformed);
return;
}
-
+
// Read the identifier.
Lex(Tok);
if (Tok.isNot(tok::identifier)) {
Diag(CommentLoc, diag::err_pragma_comment_malformed);
return;
}
-
+
// Verify that this is one of the 5 whitelisted options.
// FIXME: warn that 'exestr' is deprecated.
const IdentifierInfo *II = Tok.getIdentifierInfo();
- if (!II->isStr("compiler") && !II->isStr("exestr") && !II->isStr("lib") &&
+ if (!II->isStr("compiler") && !II->isStr("exestr") && !II->isStr("lib") &&
!II->isStr("linker") && !II->isStr("user")) {
Diag(Tok.getLocation(), diag::err_pragma_comment_unknown_kind);
return;
}
-
+
// Read the optional string if present.
Lex(Tok);
std::string ArgumentString;
@@ -390,13 +390,13 @@ void Preprocessor::HandlePragmaComment(Token &Tok) {
ArgumentString = std::string(Literal.GetString(),
Literal.GetString()+Literal.GetStringLength());
}
-
+
// FIXME: If the kind is "compiler" warn if the string is present (it is
// ignored).
// FIXME: 'lib' requires a comment string.
// FIXME: 'linker' requires a comment string, and has a specific list of
// things that are allowable.
-
+
if (Tok.isNot(tok::r_paren)) {
Diag(Tok.getLocation(), diag::err_pragma_comment_malformed);
return;
@@ -407,7 +407,7 @@ void Preprocessor::HandlePragmaComment(Token &Tok) {
Diag(Tok.getLocation(), diag::err_pragma_comment_malformed);
return;
}
-
+
// If the pragma is lexically sound, notify any interested PPCallbacks.
if (Callbacks)
Callbacks->PragmaComment(CommentLoc, II, ArgumentString);
@@ -419,14 +419,14 @@ void Preprocessor::HandlePragmaComment(Token &Tok) {
/// AddPragmaHandler - Add the specified pragma handler to the preprocessor.
/// If 'Namespace' is non-null, then it is a token required to exist on the
/// pragma line before the pragma string starts, e.g. "STDC" or "GCC".
-void Preprocessor::AddPragmaHandler(const char *Namespace,
+void Preprocessor::AddPragmaHandler(const char *Namespace,
PragmaHandler *Handler) {
PragmaNamespace *InsertNS = PragmaHandlers;
-
+
// If this is specified to be in a namespace, step down into it.
if (Namespace) {
IdentifierInfo *NSID = getIdentifierInfo(Namespace);
-
+
// If there is already a pragma handler with the name of this namespace,
// we either have an error (directive with the same name as a namespace) or
// we already have the namespace to insert into.
@@ -441,7 +441,7 @@ void Preprocessor::AddPragmaHandler(const char *Namespace,
PragmaHandlers->AddPragma(InsertNS);
}
}
-
+
// Check to make sure we don't already have a pragma for this identifier.
assert(!InsertNS->FindHandler(Handler->getName()) &&
"Pragma handler already exists for this identifier!");
@@ -455,7 +455,7 @@ void Preprocessor::AddPragmaHandler(const char *Namespace,
void Preprocessor::RemovePragmaHandler(const char *Namespace,
PragmaHandler *Handler) {
PragmaNamespace *NS = PragmaHandlers;
-
+
// If this is specified to be in a namespace, step down into it.
if (Namespace) {
IdentifierInfo *NSID = getIdentifierInfo(Namespace);
@@ -467,7 +467,7 @@ void Preprocessor::RemovePragmaHandler(const char *Namespace,
}
NS->RemovePragmaHandler(Handler);
-
+
// If this is a non-default namespace and it is now empty, remove
// it.
if (NS != PragmaHandlers && NS->IsEmpty())
@@ -516,19 +516,29 @@ struct PragmaDependencyHandler : public PragmaHandler {
PP.HandlePragmaDependency(DepToken);
}
};
-
+
/// PragmaDiagnosticHandler - e.g. '#pragma GCC diagnostic ignored "-Wformat"'
+/// Since clang's diagnostic supports extended functionality beyond GCC's
+/// the constructor takes a clangMode flag to tell it whether or not to allow
+/// clang's extended functionality, or whether to reject it.
struct PragmaDiagnosticHandler : public PragmaHandler {
- PragmaDiagnosticHandler(const IdentifierInfo *ID) : PragmaHandler(ID) {}
+private:
+ const bool ClangMode;
+public:
+ PragmaDiagnosticHandler(const IdentifierInfo *ID,
+ const bool clangMode) : PragmaHandler(ID),
+ ClangMode(clangMode) {}
virtual void HandlePragma(Preprocessor &PP, Token &DiagToken) {
Token Tok;
PP.LexUnexpandedToken(Tok);
if (Tok.isNot(tok::identifier)) {
- PP.Diag(Tok, diag::warn_pragma_diagnostic_invalid);
+ unsigned Diag = ClangMode ? diag::warn_pragma_diagnostic_clang_invalid
+ : diag::warn_pragma_diagnostic_gcc_invalid;
+ PP.Diag(Tok, Diag);
return;
}
IdentifierInfo *II = Tok.getIdentifierInfo();
-
+
diag::Mapping Map;
if (II->isStr("warning"))
Map = diag::MAP_WARNING;
@@ -538,11 +548,25 @@ struct PragmaDiagnosticHandler : public PragmaHandler {
Map = diag::MAP_IGNORE;
else if (II->isStr("fatal"))
Map = diag::MAP_FATAL;
- else {
- PP.Diag(Tok, diag::warn_pragma_diagnostic_invalid);
+ else if (ClangMode) {
+ if (II->isStr("pop")) {
+ if (!PP.getDiagnostics().popMappings())
+ PP.Diag(Tok, diag::warn_pragma_diagnostic_clang_cannot_ppp);
+ return;
+ }
+
+ if (II->isStr("push")) {
+ PP.getDiagnostics().pushMappings();
+ return;
+ }
+
+ PP.Diag(Tok, diag::warn_pragma_diagnostic_clang_invalid);
+ return;
+ } else {
+ PP.Diag(Tok, diag::warn_pragma_diagnostic_gcc_invalid);
return;
}
-
+
PP.LexUnexpandedToken(Tok);
// We need at least one string.
@@ -550,7 +574,7 @@ struct PragmaDiagnosticHandler : public PragmaHandler {
PP.Diag(Tok.getLocation(), diag::warn_pragma_diagnostic_invalid_token);
return;
}
-
+
// String concatenation allows multiple strings, which can even come from
// macro expansion.
// "foo " "bar" "Baz"
@@ -559,22 +583,24 @@ struct PragmaDiagnosticHandler : public PragmaHandler {
StrToks.push_back(Tok);
PP.LexUnexpandedToken(Tok);
}
-
+
if (Tok.isNot(tok::eom)) {
PP.Diag(Tok.getLocation(), diag::warn_pragma_diagnostic_invalid_token);
return;
}
-
+
// Concatenate and parse the strings.
StringLiteralParser Literal(&StrToks[0], StrToks.size(), PP);
assert(!Literal.AnyWide && "Didn't allow wide strings in");
if (Literal.hadError)
return;
if (Literal.Pascal) {
- PP.Diag(StrToks[0].getLocation(), diag::warn_pragma_diagnostic_invalid);
+ unsigned Diag = ClangMode ? diag::warn_pragma_diagnostic_clang_invalid
+ : diag::warn_pragma_diagnostic_gcc_invalid;
+ PP.Diag(Tok, Diag);
return;
}
-
+
std::string WarningName(Literal.GetString(),
Literal.GetString()+Literal.GetStringLength());
@@ -584,14 +610,14 @@ struct PragmaDiagnosticHandler : public PragmaHandler {
diag::warn_pragma_diagnostic_invalid_option);
return;
}
-
+
if (PP.getDiagnostics().setDiagnosticGroupMapping(WarningName.c_str()+2,
Map))
PP.Diag(StrToks[0].getLocation(),
diag::warn_pragma_diagnostic_unknown_warning) << WarningName;
}
};
-
+
/// PragmaCommentHandler - "#pragma comment ...".
struct PragmaCommentHandler : public PragmaHandler {
PragmaCommentHandler(const IdentifierInfo *ID) : PragmaHandler(ID) {}
@@ -599,13 +625,13 @@ struct PragmaCommentHandler : public PragmaHandler {
PP.HandlePragmaComment(CommentTok);
}
};
-
+
// Pragma STDC implementations.
enum STDCSetting {
STDC_ON, STDC_OFF, STDC_DEFAULT, STDC_INVALID
};
-
+
static STDCSetting LexOnOffSwitch(Preprocessor &PP) {
Token Tok;
PP.LexUnexpandedToken(Tok);
@@ -633,7 +659,7 @@ static STDCSetting LexOnOffSwitch(Preprocessor &PP) {
PP.Diag(Tok, diag::ext_stdc_pragma_syntax_eom);
return Result;
}
-
+
/// PragmaSTDC_FP_CONTRACTHandler - "#pragma STDC FP_CONTRACT ...".
struct PragmaSTDC_FP_CONTRACTHandler : public PragmaHandler {
PragmaSTDC_FP_CONTRACTHandler(const IdentifierInfo *ID) : PragmaHandler(ID) {}
@@ -645,7 +671,7 @@ struct PragmaSTDC_FP_CONTRACTHandler : public PragmaHandler {
LexOnOffSwitch(PP);
}
};
-
+
/// PragmaSTDC_FENV_ACCESSHandler - "#pragma STDC FENV_ACCESS ...".
struct PragmaSTDC_FENV_ACCESSHandler : public PragmaHandler {
PragmaSTDC_FENV_ACCESSHandler(const IdentifierInfo *ID) : PragmaHandler(ID) {}
@@ -654,7 +680,7 @@ struct PragmaSTDC_FENV_ACCESSHandler : public PragmaHandler {
PP.Diag(Tok, diag::warn_stdc_fenv_access_not_supported);
}
};
-
+
/// PragmaSTDC_CX_LIMITED_RANGEHandler - "#pragma STDC CX_LIMITED_RANGE ...".
struct PragmaSTDC_CX_LIMITED_RANGEHandler : public PragmaHandler {
PragmaSTDC_CX_LIMITED_RANGEHandler(const IdentifierInfo *ID)
@@ -663,7 +689,7 @@ struct PragmaSTDC_CX_LIMITED_RANGEHandler : public PragmaHandler {
LexOnOffSwitch(PP);
}
};
-
+
/// PragmaSTDC_UnknownHandler - "#pragma STDC ...".
struct PragmaSTDC_UnknownHandler : public PragmaHandler {
PragmaSTDC_UnknownHandler() : PragmaHandler(0) {}
@@ -672,7 +698,7 @@ struct PragmaSTDC_UnknownHandler : public PragmaHandler {
PP.Diag(UnknownTok, diag::ext_stdc_pragma_ignored);
}
};
-
+
} // end anonymous namespace
@@ -681,7 +707,7 @@ struct PragmaSTDC_UnknownHandler : public PragmaHandler {
void Preprocessor::RegisterBuiltinPragmas() {
AddPragmaHandler(0, new PragmaOnceHandler(getIdentifierInfo("once")));
AddPragmaHandler(0, new PragmaMarkHandler(getIdentifierInfo("mark")));
-
+
// #pragma GCC ...
AddPragmaHandler("GCC", new PragmaPoisonHandler(getIdentifierInfo("poison")));
AddPragmaHandler("GCC", new PragmaSystemHeaderHandler(
@@ -689,7 +715,8 @@ void Preprocessor::RegisterBuiltinPragmas() {
AddPragmaHandler("GCC", new PragmaDependencyHandler(
getIdentifierInfo("dependency")));
AddPragmaHandler("GCC", new PragmaDiagnosticHandler(
- getIdentifierInfo("diagnostic")));
+ getIdentifierInfo("diagnostic"),
+ false));
// #pragma clang ...
AddPragmaHandler("clang", new PragmaPoisonHandler(
getIdentifierInfo("poison")));
@@ -698,7 +725,8 @@ void Preprocessor::RegisterBuiltinPragmas() {
AddPragmaHandler("clang", new PragmaDependencyHandler(
getIdentifierInfo("dependency")));
AddPragmaHandler("clang", new PragmaDiagnosticHandler(
- getIdentifierInfo("diagnostic")));
+ getIdentifierInfo("diagnostic"),
+ true));
AddPragmaHandler("STDC", new PragmaSTDC_FP_CONTRACTHandler(
getIdentifierInfo("FP_CONTRACT")));
@@ -707,7 +735,7 @@ void Preprocessor::RegisterBuiltinPragmas() {
AddPragmaHandler("STDC", new PragmaSTDC_CX_LIMITED_RANGEHandler(
getIdentifierInfo("CX_LIMITED_RANGE")));
AddPragmaHandler("STDC", new PragmaSTDC_UnknownHandler());
-
+
// MS extensions.
if (Features.Microsoft)
AddPragmaHandler(0, new PragmaCommentHandler(getIdentifierInfo("comment")));
generated by cgit v1.2.3 (git 2.25.1) at 2025-06-30 20:05:32 +0000