commit d3923aaa6eaf3bb5dde5b00536f56467f00e02ff
author Reid Kleckner <reid@kleckner.net> Thu Apr 03 19:04:24 2014 +0000
committer Reid Kleckner <reid@kleckner.net> Thu Apr 03 19:04:24 2014 +0000
tree fbbbee0306568ab7e193d5279b1d7c092e2c5767
parent d7c5e5162739a22c149834c902f173f909398654

-fms-extensions: Error out on #pragma init_seg

By ignoring this pragma with a warning, we're essentially miscompiling
the user's program.  WebKit / Blink use this pragma to disable dynamic
initialization and finalization of some static data, and running the
dtors crashes the program.

Error out for now, so that /fallback compiles the TU correctly with
MSVC.  This pragma should be implemented some time this month, and we
can remove this hack.

llvm-svn: 205554

clang/lib/Parse/ParsePragma.cpp

diff --git a/clang/lib/Parse/ParsePragma.cpp b/clang/lib/Parse/ParsePragma.cpp
index 29e1771..33c1f0b 100644
--- a/clang/lib/Parse/ParsePragma.cpp
+++ b/clang/lib/Parse/ParsePragma.cpp
@@ -124,6 +124,12 @@
                     Token &FirstToken) override;
 };
 
+struct PragmaMSInitSeg : public PragmaHandler {
+  explicit PragmaMSInitSeg() : PragmaHandler("init_seg") {}
+  void HandlePragma(Preprocessor &PP, PragmaIntroducerKind Introducer,
+                    Token &FirstToken) override;
+};
+
 }  // end namespace
 
 void Parser::initializePragmaHandlers() {
@@ -175,6 +181,8 @@
     PP.AddPragmaHandler(MSPointersToMembers.get());
     MSVtorDisp.reset(new PragmaMSVtorDisp());
     PP.AddPragmaHandler(MSVtorDisp.get());
+    MSInitSeg.reset(new PragmaMSInitSeg());
+    PP.AddPragmaHandler(MSInitSeg.get());
   }
 }
 
@@ -214,6 +222,8 @@
     MSPointersToMembers.reset();
     PP.RemovePragmaHandler(MSVtorDisp.get());
     MSVtorDisp.reset();
+    PP.RemovePragmaHandler(MSInitSeg.get());
+    MSInitSeg.reset();
   }
 
   PP.RemovePragmaHandler("STDC", FPContractHandler.get());
@@ -1204,6 +1214,14 @@
   PP.EnterToken(AnnotTok);
 }
 
+void PragmaMSInitSeg::HandlePragma(Preprocessor &PP,
+                                   PragmaIntroducerKind Introducer,
+                                   Token &Tok) {
+  unsigned ID = PP.getDiagnostics().getCustomDiagID(
+      DiagnosticsEngine::Error, "'#pragma init_seg' not implemented");
+  PP.Diag(Tok.getLocation(), ID);
+}
+
 /// \brief Handle the Microsoft \#pragma detect_mismatch extension.
 ///
 /// The syntax is: