#6 Notify SamplingProfiler of the main MachineThread

Reviewed By: bnham

Differential Revision: D3503444

fbshipit-source-id: a2e9a692cd5badac5a15416844c8497f88021a5e

ReactCommon/cxxreact/BUCK

@@ -117,6 +117,7 @@ react_library(
     'JSCLegacyTracing.cpp',
     'JSCMemory.cpp',
     'JSCPerfStats.cpp',
+    'JSCSamplingProfiler.cpp',
     'JSCTracing.cpp',
     'JSCWebWorker.cpp',
     'MethodCall.cpp',
@@ -130,6 +131,7 @@ react_library(
     'JSCLegacyTracing.h',
     'JSCMemory.h',
     'JSCPerfStats.h',
+    'JSCSamplingProfiler.h',
     'JSCTracing.h',
   ],
   exported_headers = [

ReactCommon/cxxreact/JSCExecutor.cpp

@@ -20,6 +20,8 @@
 #include "SystraceSection.h"
 #include "Value.h"
 
+#include "JSCSamplingProfiler.h"
+
 #if defined(WITH_JSC_EXTRA_TRACING) || DEBUG
 #include "JSCTracing.h"
 #endif
@@ -223,6 +225,8 @@ void JSCExecutor::initOnJSVMThread() throw(JSException) {
   addNativeProfilingHooks(m_context);
   addNativeTracingLegacyHooks(m_context);
   PerfLogging::installNativeHooks(m_context);
+
+  initSamplingProfilerOnMainJSCThread(m_context);
   #endif
 
   #ifdef WITH_FB_MEMORY_PROFILING

ReactCommon/cxxreact/JSCSamplingProfiler.cpp

@@ -0,0 +1,19 @@
+// Copyright 2004-present Facebook. All Rights Reserved.
+
+#ifdef WITH_JSC_EXTRA_TRACING
+
+#include "JSCSamplingProfiler.h"
+
+#include <JavaScriptCore/API/JSProfilerPrivate.h>
+
+namespace facebook {
+namespace react {
+
+void initSamplingProfilerOnMainJSCThread(JSGlobalContextRef ctx) {
+  JSStartSamplingProfilingOnMainJSCThread(ctx);
+}
+
+}
+}
+
+#endif // WITH_JSC_EXTRA_TRACING

ReactCommon/cxxreact/JSCSamplingProfiler.h

@@ -0,0 +1,16 @@
+// Copyright 2004-present Facebook. All Rights Reserved.
+
+#pragma once
+
+#ifdef WITH_JSC_EXTRA_TRACING
+
+#include <JavaScriptCore/JSContextRef.h>
+
+namespace facebook {
+namespace react {
+
+void initSamplingProfilerOnMainJSCThread(JSGlobalContextRef ctx);
+}
+}
+
+#endif // WITH_JSC_EXTRA_TRACING