71 lines
1.9 KiB
C++
71 lines
1.9 KiB
C++
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// Copyright 2004-present Facebook. All Rights Reserved.
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#include "JSCLegacyTracing.h"
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#if defined(WITH_JSC_EXTRA_TRACING)
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#include <fbsystrace.h>
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#include <JavaScriptCore/API/JSProfilerPrivate.h>
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#include <jschelpers/JSCHelpers.h>
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#include <jschelpers/Value.h>
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static const char *ENABLED_FBSYSTRACE_PROFILE_NAME = "__fbsystrace__";
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using namespace facebook::react;
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static int64_t int64FromJSValue(JSContextRef ctx, JSValueRef value, JSValueRef* exception) {
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return static_cast<int64_t>(JSC_JSValueToNumber(ctx, value, exception));
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}
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static JSValueRef nativeTraceBeginLegacy(
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JSContextRef ctx,
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JSObjectRef function,
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JSObjectRef thisObject,
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size_t argumentCount,
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const JSValueRef arguments[],
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JSValueRef* exception) {
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if (FBSYSTRACE_LIKELY(argumentCount >= 1)) {
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uint64_t tag = int64FromJSValue(ctx, arguments[0], exception);
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if (!fbsystrace_is_tracing(tag)) {
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return Value::makeUndefined(ctx);
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}
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}
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JSStartProfiling(ctx, String(ctx, ENABLED_FBSYSTRACE_PROFILE_NAME), true);
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return Value::makeUndefined(ctx);
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}
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static JSValueRef nativeTraceEndLegacy(
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JSContextRef ctx,
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JSObjectRef function,
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JSObjectRef thisObject,
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size_t argumentCount,
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const JSValueRef arguments[],
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JSValueRef* exception) {
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if (FBSYSTRACE_LIKELY(argumentCount >= 1)) {
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uint64_t tag = int64FromJSValue(ctx, arguments[0], exception);
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if (!fbsystrace_is_tracing(tag)) {
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return Value::makeUndefined(ctx);
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}
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}
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JSEndProfiling(ctx, String(ctx, ENABLED_FBSYSTRACE_PROFILE_NAME));
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return Value::makeUndefined(ctx);
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}
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#endif
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namespace facebook {
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namespace react {
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void addNativeTracingLegacyHooks(JSGlobalContextRef ctx) {
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#if defined(WITH_JSC_EXTRA_TRACING)
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installGlobalFunction(ctx, "nativeTraceBeginLegacy", nativeTraceBeginLegacy);
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installGlobalFunction(ctx, "nativeTraceEndLegacy", nativeTraceEndLegacy);
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#endif
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}
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} }
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