When an error occurs while building a module on demand, provide "While
building module 'Foo' imported from..." notes (the same we we provide
"In file included from..." notes) in the diagnostic, so that we know
how this module got included in the first place. This is part of
<rdar://problem/12696425>.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@169021 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Frontend/DiagnosticRenderer.cpp b/lib/Frontend/DiagnosticRenderer.cpp
index 3143cc7..3599df8 100644
--- a/lib/Frontend/DiagnosticRenderer.cpp
+++ b/lib/Frontend/DiagnosticRenderer.cpp
@@ -205,8 +205,10 @@
/// on the way back down.
void DiagnosticRenderer::emitIncludeStackRecursively(SourceLocation Loc,
const SourceManager &SM) {
- if (Loc.isInvalid())
+ if (Loc.isInvalid()) {
+ emitModuleBuildPath(SM);
return;
+ }
PresumedLoc PLoc = SM.getPresumedLoc(Loc, DiagOpts->ShowPresumedLoc);
if (PLoc.isInvalid())
@@ -219,6 +221,21 @@
emitIncludeLocation(Loc, PLoc, SM);
}
+/// \brief Emit the module build path, for cases where a module is (re-)built
+/// on demand.
+void DiagnosticRenderer::emitModuleBuildPath(const SourceManager &SM) {
+ ModuleBuildPath Path = SM.getModuleBuildPath();
+ for (unsigned I = 0, N = Path.size(); I != N; ++I) {
+ const SourceManager &CurSM = Path[I].second.getManager();
+ SourceLocation CurLoc = Path[I].second;
+ emitBuildingModuleLocation(CurLoc,
+ CurSM.getPresumedLoc(CurLoc,
+ DiagOpts->ShowPresumedLoc),
+ Path[I].first,
+ CurSM);
+ }
+}
+
// Helper function to fix up source ranges. It takes in an array of ranges,
// and outputs an array of ranges where we want to draw the range highlighting
// around the location specified by CaretLoc.
@@ -390,6 +407,20 @@
emitNote(Loc, Message.str(), &SM);
}
+void
+DiagnosticNoteRenderer::emitBuildingModuleLocation(SourceLocation Loc,
+ PresumedLoc PLoc,
+ StringRef ModuleName,
+ const SourceManager &SM) {
+ // Generate a note indicating the include location.
+ SmallString<200> MessageStorage;
+ llvm::raw_svector_ostream Message(MessageStorage);
+ Message << "while building module '" << ModuleName << "' imported from "
+ << PLoc.getFilename() << ':' << PLoc.getLine() << ":";
+ emitNote(Loc, Message.str(), &SM);
+}
+
+
void DiagnosticNoteRenderer::emitBasicNote(StringRef Message) {
emitNote(SourceLocation(), Message, 0);
}