[Timers] TimerGroup: make printJSONValues() method public

Summary:
This is needed for the continuation of D46504,
to be able to store the timings.

Reviewers: george.karpenkov, NoQ, alexfh, sbenza

Reviewed By: alexfh

Subscribers: llvm-commits, cfe-commits

Differential Revision: https://reviews.llvm.org/D46938

llvm-svn: 332505

llvm/include/llvm/Support/Timer.h

@@ -207,6 +207,8 @@ public:
   /// This static method prints all timers and clears them all out.
   static void printAll(raw_ostream &OS);
 
+  const char *printJSONValues(raw_ostream &OS, const char *delim);
+
   /// Prints all timers as JSON key/value pairs, and clears them all out.
   static const char *printAllJSONValues(raw_ostream &OS, const char *delim);
 
@@ -223,7 +225,6 @@ private:
   void PrintQueuedTimers(raw_ostream &OS);
   void printJSONValue(raw_ostream &OS, const PrintRecord &R,
                       const char *suffix, double Value);
-  const char *printJSONValues(raw_ostream &OS, const char *delim);
 };
 
 } // end namespace llvm

llvm/lib/Support/Timer.cpp

@@ -378,6 +378,8 @@ void TimerGroup::printJSONValue(raw_ostream &OS, const PrintRecord &R,
 }
 
 const char *TimerGroup::printJSONValues(raw_ostream &OS, const char *delim) {
+  sys::SmartScopedLock<true> L(*TimerLock);
+
   prepareToPrintList();
   for (const PrintRecord &R : TimersToPrint) {
     OS << delim;