Fix locking for printing error messages.

unittest/BitcodeMunge.h

 //===- BitcodeMunge.h - Subzero Bitcode Munger ------------------*- C++ -*-===//
 //
 //                     The LLVM Compiler Infrastructure
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 //
 // Test harness for testing malformed bitcode files in Subzero. Uses NaCl's
 // bitcode munger to do this.
 //
 //===----------------------------------------------------------------------===//
 
 #ifndef SUBZERO_UNITTEST_BITCODEMUNGE_H
 #define SUBZERO_UNITTEST_BITCODEMUNGE_H
 
 #include "llvm/Bitcode/NaCl/NaClBitcodeMunge.h"
 
+#include "IceClFlags.h"
+
 namespace IceTest {
 
 // Class to run tests on Subzero's bitcode parser. Runs a Subzero
 // translation, using (possibly) edited bitcode record values.  For
 // more details on how to represent the input arrays, see
 // NaClBitcodeMunge.h.
 class SubzeroBitcodeMunger : public llvm::NaClBitcodeMunger {
 public:
   SubzeroBitcodeMunger(const uint64_t Records[], size_t RecordSize,
                        uint64_t RecordTerminator)
-      : llvm::NaClBitcodeMunger(Records, RecordSize, RecordTerminator) {}
+      : llvm::NaClBitcodeMunger(Records, RecordSize, RecordTerminator) {
+    resetMungeFlags();
+  }
 
   /// Runs PNaClTranslator to translate bitcode records (with defined
   /// record Munges), and puts output into DumpResults. Returns true
   /// if parse is successful.
   bool runTest(const char *TestName, const uint64_t Munges[], size_t MungeSize);
 
   /// Same as above, but without any edits.
   bool runTest(const char *TestName) {
     uint64_t NoMunges[] = {0};
     return runTest(TestName, NoMunges, 0);
   }
+
+  /// Sets flags back to default assumptions for munging.
+  void resetFlags();
+
+  /// Flags to use to run tests. Use to change default assumptions.
+  Ice::ClFlags Flags;
+
+private:
+  void resetMungeFlags();
 };
 
 } // end of namespace IceTest
 
 #endif // SUBZERO_UNITTEST_BITCODEMUNGE_H