Merge pull request #14814 from jrose-apple/dump-truck

Dump (some) filelists in the PrettyStackTrace

include/swift/Basic/PrettyStackTrace.h

@@ -16,6 +16,10 @@
 #include "llvm/Support/PrettyStackTrace.h"
 #include "llvm/ADT/StringRef.h"
 
+namespace llvm {
+  class MemoryBuffer;
+}
+
 namespace swift {
 
 /// A PrettyStackTraceEntry for performing an action involving a StringRef.
@@ -31,6 +35,15 @@ public:
   void print(llvm::raw_ostream &OS) const override;
 };
 
+/// A PrettyStackTraceEntry to dump the contents of a file.
+class PrettyStackTraceFileContents : public llvm::PrettyStackTraceEntry {
+  const llvm::MemoryBuffer &Buffer;
+public:
+  explicit PrettyStackTraceFileContents(const llvm::MemoryBuffer &buffer)
+    : Buffer(buffer) {}
+  void print(llvm::raw_ostream &OS) const override;
+};
+
 } // end namespace swift
 
 #endif // SWIFT_BASIC_PRETTYSTACKTRACE_H