perftools-pause.patch

diff --git a/src/gperftools/profiler.h b/src/gperftools/profiler.h
index 95b107f..816468d 100644
--- a/src/gperftools/profiler.h
+++ b/src/gperftools/profiler.h
@@ -139,6 +139,8 @@ PERFTOOLS_DLL_DECL void ProfilerStop();
  */
 PERFTOOLS_DLL_DECL void ProfilerFlush();
 
+PERFTOOLS_DLL_DECL void ProfilerPause();
+PERFTOOLS_DLL_DECL void ProfilerResume();
 
 /* DEPRECATED: these functions were used to enable/disable profiling
  * in the current thread, but no longer do anything.
diff --git a/src/profiler.cc b/src/profiler.cc
index a2a4faa..82cdf6d 100644
--- a/src/profiler.cc
+++ b/src/profiler.cc
@@ -129,6 +129,7 @@ class CpuProfiler {
   // ProfileHandlerUnregisterCallback.
   ProfileHandlerToken* prof_handler_token_;
 
+ public:
   // Sets up a callback to receive SIGPROF interrupt.
   void EnableHandler();
 
@@ -325,8 +326,9 @@ void CpuProfiler::EnableHandler() {
 }
 
 void CpuProfiler::DisableHandler() {
-  RAW_CHECK(prof_handler_token_ != NULL, "SIGPROF handler is not registered");
-  ProfileHandlerUnregisterCallback(prof_handler_token_);
+  //RAW_CHECK(prof_handler_token_ != NULL, "SIGPROF handler is not registered");
+  if (prof_handler_token_ != NULL)
+    ProfileHandlerUnregisterCallback(prof_handler_token_);
   prof_handler_token_ = NULL;
 }
 
@@ -389,6 +391,14 @@ extern "C" PERFTOOLS_DLL_DECL void ProfilerStop() {
   CpuProfiler::instance_.Stop();
 }
 
+extern "C" PERFTOOLS_DLL_DECL void ProfilerPause() {
+  CpuProfiler::instance_.DisableHandler();
+}
+
+extern "C" PERFTOOLS_DLL_DECL void ProfilerResume() {
+  CpuProfiler::instance_.EnableHandler();
+}
+
 extern "C" PERFTOOLS_DLL_DECL void ProfilerGetCurrentState(
     ProfilerState* state) {
   CpuProfiler::instance_.GetCurrentState(state);