react-native/ReactCommon/bridge/JSCMemory.cpp

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// Copyright 2004-present Facebook. All Rights Reserved.
#include <stdio.h>
#include <string.h>
#include <JavaScriptCore/JavaScript.h>
#include <JavaScriptCore/API/JSProfilerPrivate.h>
#include "JSCHelpers.h"
#include "Value.h"
#ifdef WITH_FB_MEMORY_PROFILING
static JSValueRef nativeCaptureHeap(
JSContextRef ctx,
JSObjectRef function,
JSObjectRef thisObject,
size_t argumentCount,
const JSValueRef arguments[],
JSValueRef* exception) {
if (argumentCount < 1) {
if (exception) {
*exception = facebook::react::makeJSCException(
ctx,
"nativeCaptureHeap requires the path to save the capture");
}
return JSValueMakeUndefined(ctx);
}
JSStringRef outputFilename = JSValueToStringCopy(ctx, arguments[0], exception);
std::string finalFilename = facebook::react::String::ref(outputFilename).str();
JSCaptureHeap(ctx, finalFilename.c_str(), exception);
JSStringRelease(outputFilename);
return JSValueMakeUndefined(ctx);
}
#endif // WITH_FB_MEMORY_PROFILING
namespace facebook {
namespace react {
void addNativeMemoryHooks(JSGlobalContextRef ctx) {
#ifdef WITH_FB_MEMORY_PROFILING
installGlobalFunction(ctx, "nativeCaptureHeap", nativeCaptureHeap);
#endif // WITH_FB_MEMORY_PROFILING
}
} }