136 lines
4.2 KiB
Objective-C
136 lines
4.2 KiB
Objective-C
/**
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* Copyright (c) 2015-present, Facebook, Inc.
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* All rights reserved.
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*
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* This source code is licensed under the BSD-style license found in the
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* LICENSE file in the root directory of this source tree. An additional grant
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* of patent rights can be found in the PATENTS file in the same directory.
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*/
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#import "RCTJSCProfiler.h"
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#import <UIKit/UIKit.h>
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#import "RCTLog.h"
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#ifndef RCT_JSC_PROFILER
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#define RCT_JSC_PROFILER RCT_PROFILE
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#endif
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#if RCT_JSC_PROFILER
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#include <dlfcn.h>
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#ifndef RCT_JSC_PROFILER_DYLIB
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#define RCT_JSC_PROFILER_DYLIB [[[NSBundle mainBundle] pathForResource:[NSString stringWithFormat:@"RCTJSCProfiler.ios%zd", [[[UIDevice currentDevice] systemVersion] integerValue]] ofType:@"dylib" inDirectory:@"RCTJSCProfiler"] UTF8String]
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#endif
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static const char *const JSCProfileName = "profile";
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typedef void (*JSCProfilerStartFunctionType)(JSContextRef, const char *);
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typedef void (*JSCProfilerEndFunctionType)(JSContextRef, const char *, const char *);
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typedef void (*JSCProfilerEnableFunctionType)(void);
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static NSMutableDictionary<NSValue *, NSNumber *> *RCTJSCProfilerStateMap;
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static JSCProfilerStartFunctionType RCTNativeProfilerStart = NULL;
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static JSCProfilerEndFunctionType RCTNativeProfilerEnd = NULL;
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NS_INLINE NSValue *RCTJSContextRefKey(JSContextRef ref) {
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return [NSValue valueWithPointer:ref];
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}
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static void RCTJSCProfilerStateInit()
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{
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static dispatch_once_t onceToken;
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dispatch_once(&onceToken, ^{
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RCTJSCProfilerStateMap = [NSMutableDictionary new];
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void *JSCProfiler = dlopen(RCT_JSC_PROFILER_DYLIB, RTLD_NOW);
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RCTNativeProfilerStart = (JSCProfilerStartFunctionType)dlsym(JSCProfiler, "nativeProfilerStart");
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RCTNativeProfilerEnd = (JSCProfilerEndFunctionType)dlsym(JSCProfiler, "nativeProfilerEnd");
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JSCProfilerEnableFunctionType enableBytecode = (__typeof__(enableBytecode))dlsym(JSCProfiler, "nativeProfilerEnableBytecode");
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if (RCTNativeProfilerStart && RCTNativeProfilerEnd && enableBytecode) {
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enableBytecode();
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} else {
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RCTNativeProfilerStart = NULL;
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RCTNativeProfilerEnd = NULL;
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}
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});
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}
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#endif
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void RCTJSCProfilerStart(JSContextRef ctx)
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{
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#if RCT_JSC_PROFILER
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if (ctx != NULL) {
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if (RCTJSCProfilerIsSupported()) {
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NSValue *key = RCTJSContextRefKey(ctx);
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BOOL isProfiling = [RCTJSCProfilerStateMap[key] boolValue];
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if (!isProfiling) {
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RCTLogInfo(@"Starting JSC profiler for context: %p", ctx);
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RCTJSCProfilerStateMap[key] = @YES;
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RCTNativeProfilerStart(ctx, JSCProfileName);
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} else {
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RCTLogWarn(@"Trying to start JSC profiler on a context which is already profiled.");
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}
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} else {
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RCTLogWarn(@"Cannot start JSC profiler as it's not supported.");
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}
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} else {
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RCTLogWarn(@"Trying to start JSC profiler for NULL context.");
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}
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#endif
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}
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NSString *RCTJSCProfilerStop(JSContextRef ctx)
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{
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NSString *outputFile = nil;
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#if RCT_JSC_PROFILER
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if (ctx != NULL) {
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RCTJSCProfilerStateInit();
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NSValue *key = RCTJSContextRefKey(ctx);
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BOOL isProfiling = [RCTJSCProfilerStateMap[key] boolValue];
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if (isProfiling) {
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NSString *filename = [NSString stringWithFormat:@"cpu_profile_%ld.json", (long)CFAbsoluteTimeGetCurrent()];
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outputFile = [NSTemporaryDirectory() stringByAppendingPathComponent:filename];
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if (RCTNativeProfilerEnd) {
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RCTNativeProfilerEnd(ctx, JSCProfileName, outputFile.UTF8String);
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}
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RCTLogInfo(@"Stopped JSC profiler for context: %p", ctx);
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} else {
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RCTLogWarn(@"Trying to stop JSC profiler on a context which is not being profiled.");
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}
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[RCTJSCProfilerStateMap removeObjectForKey:key];
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} else {
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RCTLogWarn(@"Trying to stop JSC profiler for NULL context.");
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}
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#endif
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return outputFile;
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}
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BOOL RCTJSCProfilerIsProfiling(JSContextRef ctx)
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{
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BOOL isProfiling = NO;
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#if RCT_JSC_PROFILER
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if (ctx != NULL) {
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RCTJSCProfilerStateInit();
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isProfiling = [RCTJSCProfilerStateMap[RCTJSContextRefKey(ctx)] boolValue];
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}
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#endif
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return isProfiling;
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}
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BOOL RCTJSCProfilerIsSupported(void)
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{
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BOOL isSupported = NO;
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#if RCT_JSC_PROFILER
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RCTJSCProfilerStateInit();
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isSupported = (RCTNativeProfilerStart != NULL);
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#endif
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return isSupported;
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}
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