From 1e879d8be6322f9f974db3dc7dc4279ea46b4645 Mon Sep 17 00:00:00 2001
From: Jordan Rose <jordan_rose@apple.com>
Date: Fri, 23 Mar 2018 00:07:18 +0000
Subject: 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
---
 clang/lib/Frontend/CompilerInstance.cpp | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'clang/lib/Frontend/CompilerInstance.cpp')

diff --git a/clang/lib/Frontend/CompilerInstance.cpp b/clang/lib/Frontend/CompilerInstance.cpp
index bb8b8572fa7..1ed254d6aed 100644
--- a/clang/lib/Frontend/CompilerInstance.cpp
+++ b/clang/lib/Frontend/CompilerInstance.cpp
@@ -1170,6 +1170,11 @@ compileModuleImpl(CompilerInstance &ImportingInstance, SourceLocation ImportLoc,
   llvm::CrashRecoveryContext CRC;
   CRC.RunSafelyOnThread(
       [&]() {
+        SmallString<64> CrashInfoMessage("While building module for '");
+        CrashInfoMessage += ModuleName;
+        CrashInfoMessage += "'";
+        llvm::PrettyStackTraceString CrashInfo(CrashInfoMessage.c_str());
+
         GenerateModuleFromModuleMapAction Action;
         Instance.ExecuteAction(Action);
       },
-- 
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