Fix locking for printing error messages.

src/IceClFlags.h

 //===- subzero/src/IceClFlags.h - Cl Flags for translation ------*- C++ -*-===//
 //
 //                        The Subzero Code Generator
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 //
 // This file declares command line flags controlling translation.
 //
 //===----------------------------------------------------------------------===//
 
 #ifndef SUBZERO_SRC_ICECLFLAGS_H
 #define SUBZERO_SRC_ICECLFLAGS_H
 
 #include "IceDefs.h"
 #include "IceTypes.h"
 
 namespace Ice {
 
 class ClFlagsExtra;
 
 class ClFlags {
   ClFlags(const ClFlags &) = delete;
   ClFlags &operator=(const ClFlags &) = delete;
 
 public:
-  ClFlags()
-      : // bool fields.
-        AllowErrorRecovery(false),
-        AllowUninitializedGlobals(false), DataSections(false),
-        DecorateAsm(false), DisableInternal(false), DisableIRGeneration(false),
-        DisableTranslation(false), DumpStats(false), FunctionSections(false),
-        GenerateUnitTestMessages(false), PhiEdgeSplit(false),
-        RandomNopInsertion(false), RandomRegAlloc(false),
-        SubzeroTimingEnabled(false), TimeEachFunction(false),
-        UseSandboxing(false),
-        // Enum and integer fields.
-        Opt(Opt_m1), OutFileType(FT_Iasm), RandomMaxNopsPerInstruction(0),
-        RandomNopProbabilityAsPercentage(0), TArch(TargetArch_NUM),
-        VMask(IceV_None),
-        // IceString fields.
-        DefaultFunctionPrefix(""), DefaultGlobalPrefix(""), TestPrefix(""),
-        TimingFocusOn(""), TranslateOnly(""), VerboseFocusOn(""),
-        // size_t and 64-bit fields.
-        NumTranslationThreads(0), RandomSeed(0) {}
+  ClFlags() { resetClFlags(*this); }
 
   static void parseFlags(int argc, char *argv[]);
+  static void resetClFlags(ClFlags &OutFlags);
   static void getParsedClFlags(ClFlags &OutFlags);
   static void getParsedClFlagsExtra(ClFlagsExtra &OutFlagsExtra);
 
   // bool accessors.
 
   bool getAllowErrorRecovery() const { return AllowErrorRecovery; }
   void setAllowErrorRecovery(bool NewValue) { AllowErrorRecovery = NewValue; }
 
   bool getAllowUninitializedGlobals() const {
     return AllowUninitializedGlobals;
@@ skipping 160 matching lines @@
   IceString TranslateOnly;
   IceString VerboseFocusOn;
 
   size_t NumTranslationThreads; // 0 means completely sequential
   uint64_t RandomSeed;
 };
 
 } // end of namespace Ice
 
 #endif // SUBZERO_SRC_ICECLFLAGS_H