Sink PrettyDeclStackTrace down to the AST library

...and add some very basic stack trace entries for module building.
This would have helped track down rdar://problem/38434694 sooner.

llvm-svn: 328276

1 files changed, 4 insertions, 0 deletions

diff --git a/clang/lib/Serialization/ASTWriterDecl.cpp b/clang/lib/Serialization/ASTWriterDecl.cpp
index 6a426036a26..d70debaf85f 100644
--- a/clang/lib/Serialization/ASTWriterDecl.cpp
+++ b/clang/lib/Serialization/ASTWriterDecl.cpp
@@ -17,6 +17,7 @@
 #include "clang/AST/DeclTemplate.h"
 #include "clang/AST/DeclVisitor.h"
 #include "clang/AST/Expr.h"
+#include "clang/AST/PrettyDeclStackTrace.h"
 #include "clang/Basic/SourceManager.h"
 #include "clang/Serialization/ASTReader.h"
 #include "clang/Serialization/ASTWriter.h"
@@ -2227,6 +2228,9 @@ static bool isRequiredDecl(const Decl *D, ASTContext &Context,
 }
 
 void ASTWriter::WriteDecl(ASTContext &Context, Decl *D) {
+  PrettyDeclStackTraceEntry CrashInfo(Context, D, SourceLocation(),
+                                      "serializing");
+
   // Determine the ID for this declaration.
   serialization::DeclID ID;
   assert(!D->isFromASTFile() && "should not be emitting imported decl");