react-native/ReactCommon/cxxreact/JSCPerfStats.cpp

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// Copyright 2004-present Facebook. All Rights Reserved.
#include "JSCPerfStats.h"
#ifdef JSC_HAS_PERF_STATS_API
#include <JavaScriptCore/JSPerfStats.h>
#include <JavaScriptCore/JSValueRef.h>
#include "JSCHelpers.h"
#include "Value.h"
static JSValueRef nativeGetHeapStats(
JSContextRef ctx,
JSObjectRef function,
JSObjectRef thisObject,
size_t argumentCount,
const JSValueRef arguments[],
JSValueRef* exception) {
JSHeapStats heapStats = {0};
JSGetHeapStats(ctx, &heapStats);
auto result = facebook::react::Object::create(ctx);
result.setProperty("size", {ctx, JSValueMakeNumber(ctx, heapStats.size)});
result.setProperty("extra_size", {ctx, JSValueMakeNumber(ctx, heapStats.extraSize)});
result.setProperty("capacity", {ctx, JSValueMakeNumber(ctx, heapStats.capacity)});
result.setProperty("object_count", {ctx, JSValueMakeNumber(ctx, heapStats.objectCount)});
return (JSObjectRef) result;
}
static JSValueRef nativeGetGCStats(
JSContextRef ctx,
JSObjectRef function,
JSObjectRef thisObject,
size_t argumentCount,
const JSValueRef arguments[],
JSValueRef* exception) {
JSGCStats gcStats = {0};
JSGetGCStats(ctx, &gcStats);
auto result = facebook::react::Object::create(ctx);
result.setProperty(
"last_full_gc_length",
{ctx, JSValueMakeNumber(ctx, gcStats.lastFullGCLength)});
result.setProperty(
"last_eden_gc_length",
{ctx, JSValueMakeNumber(ctx, gcStats.lastEdenGCLength)});
return (JSObjectRef) result;
}
#endif
namespace facebook {
namespace react {
void addJSCPerfStatsHooks(JSGlobalContextRef ctx) {
#ifdef JSC_HAS_PERF_STATS_API
installGlobalFunction(ctx, "nativeGetHeapStats", nativeGetHeapStats);
installGlobalFunction(ctx, "nativeGetGCStats", nativeGetGCStats);
#endif
}
} }