598 lines
21 KiB
Objective-C
598 lines
21 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 "RCTContextExecutor.h"
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#import <pthread.h>
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#import <JavaScriptCore/JavaScriptCore.h>
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#import <UIKit/UIDevice.h>
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#import "RCTAssert.h"
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#import "RCTDefines.h"
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#import "RCTDevMenu.h"
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#import "RCTLog.h"
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#import "RCTProfile.h"
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#import "RCTPerformanceLogger.h"
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#import "RCTUtils.h"
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#ifndef RCT_JSC_PROFILER
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#if RCT_DEV
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#define RCT_JSC_PROFILER 1
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#else
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#define RCT_JSC_PROFILER 0
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#endif
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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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#endif
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@interface RCTJavaScriptContext : NSObject <RCTInvalidating>
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@property (nonatomic, assign, readonly) JSGlobalContextRef ctx;
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- (instancetype)initWithJSContext:(JSGlobalContextRef)context NS_DESIGNATED_INITIALIZER;
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@end
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@implementation RCTJavaScriptContext
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{
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RCTJavaScriptContext *_self;
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}
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- (instancetype)initWithJSContext:(JSGlobalContextRef)context
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{
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if ((self = [super init])) {
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_ctx = context;
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_self = self;
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}
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return self;
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}
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RCT_NOT_IMPLEMENTED(-(instancetype)init)
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- (BOOL)isValid
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{
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return _ctx != NULL;
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}
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- (void)invalidate
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{
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if (self.isValid) {
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JSGlobalContextRelease(_ctx);
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_ctx = NULL;
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_self = nil;
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}
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}
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- (void)dealloc
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{
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CFRunLoopStop([[NSRunLoop currentRunLoop] getCFRunLoop]);
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}
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@end
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@implementation RCTContextExecutor
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{
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RCTJavaScriptContext *_context;
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NSThread *_javaScriptThread;
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}
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@synthesize valid = _valid;
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@synthesize bridge = _bridge;
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RCT_EXPORT_MODULE()
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/**
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* The one tiny pure native hook that we implement is a native logging hook.
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* You could even argue that this is not necessary - we could plumb logging
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* calls through a batched bridge, but having the pure native hook allows
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* logging to successfully come through even in the event that a batched bridge
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* crashes.
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*/
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static JSValueRef RCTNativeLoggingHook(JSContextRef context, __unused JSObjectRef object, __unused JSObjectRef thisObject, size_t argumentCount, const JSValueRef arguments[], JSValueRef *exception)
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{
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if (argumentCount > 0) {
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JSStringRef messageRef = JSValueToStringCopy(context, arguments[0], exception);
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if (!messageRef) {
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return JSValueMakeUndefined(context);
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}
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NSString *message = (__bridge_transfer NSString *)JSStringCopyCFString(kCFAllocatorDefault, messageRef);
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JSStringRelease(messageRef);
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NSRegularExpression *regex = [NSRegularExpression regularExpressionWithPattern:
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@"( stack: )?([_a-z0-9]*)@?(http://|file:///)[a-z.0-9:/_-]+/([a-z0-9_]+).bundle(:[0-9]+:[0-9]+)"
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options:NSRegularExpressionCaseInsensitive
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error:NULL];
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message = [regex stringByReplacingMatchesInString:message
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options:0
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range:(NSRange){0, message.length}
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withTemplate:@"[$4$5] \t$2"];
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RCTLogLevel level = RCTLogLevelInfo;
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if (argumentCount > 1) {
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level = MAX(level, JSValueToNumber(context, arguments[1], exception) - 1);
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}
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RCTGetLogFunction()(level, nil, nil, message);
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}
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return JSValueMakeUndefined(context);
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}
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// Do-very-little native hook for testing.
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static JSValueRef RCTNoop(JSContextRef context, __unused JSObjectRef object, __unused JSObjectRef thisObject, __unused size_t argumentCount, __unused const JSValueRef arguments[], __unused JSValueRef *exception)
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{
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static int counter = 0;
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counter++;
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return JSValueMakeUndefined(context);
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}
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static NSString *RCTJSValueToNSString(JSContextRef context, JSValueRef value)
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{
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JSStringRef JSString = JSValueToStringCopy(context, value, NULL);
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CFStringRef string = JSStringCopyCFString(kCFAllocatorDefault, JSString);
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JSStringRelease(JSString);
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return (__bridge_transfer NSString *)string;
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}
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static NSString *RCTJSValueToJSONString(JSContextRef context, JSValueRef value, unsigned indent)
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{
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JSStringRef JSString = JSValueCreateJSONString(context, value, indent, NULL);
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CFStringRef string = JSStringCopyCFString(kCFAllocatorDefault, JSString);
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JSStringRelease(JSString);
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return (__bridge_transfer NSString *)string;
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}
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static NSError *RCTNSErrorFromJSError(JSContextRef context, JSValueRef jsError)
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{
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NSString *errorMessage = jsError ? RCTJSValueToNSString(context, jsError) : @"unknown JS error";
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NSString *details = jsError ? RCTJSValueToJSONString(context, jsError, 2) : @"no details";
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return [NSError errorWithDomain:@"JS" code:1 userInfo:@{NSLocalizedDescriptionKey: errorMessage, NSLocalizedFailureReasonErrorKey: details}];
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}
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#if RCT_DEV
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static JSValueRef RCTNativeTraceBeginSection(JSContextRef context, __unused JSObjectRef object, __unused JSObjectRef thisObject, size_t argumentCount, const JSValueRef arguments[], __unused JSValueRef *exception)
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{
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static int profileCounter = 1;
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NSString *profileName;
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double tag = 0;
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if (argumentCount > 0) {
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if (JSValueIsNumber(context, arguments[0])) {
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tag = JSValueToNumber(context, arguments[0], NULL);
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} else {
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profileName = RCTJSValueToNSString(context, arguments[0]);
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}
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} else {
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profileName = [NSString stringWithFormat:@"Profile %d", profileCounter++];
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}
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if (argumentCount > 1 && JSValueIsString(context, arguments[1])) {
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profileName = RCTJSValueToNSString(context, arguments[1]);
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}
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if (profileName) {
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RCTProfileBeginEvent(tag, profileName, nil);
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}
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return JSValueMakeUndefined(context);
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}
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static JSValueRef RCTNativeTraceEndSection(JSContextRef context, __unused JSObjectRef object, __unused JSObjectRef thisObject, __unused size_t argumentCount, __unused const JSValueRef arguments[], __unused JSValueRef *exception)
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{
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if (argumentCount > 0) {
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JSValueRef *error = NULL;
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double tag = JSValueToNumber(context, arguments[0], error);
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if (error == NULL) {
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RCTProfileEndEvent((uint64_t)tag, @"console", nil);
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}
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}
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return JSValueMakeUndefined(context);
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}
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static void RCTInstallJSCProfiler(RCTBridge *bridge, JSContextRef context)
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{
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#if RCT_JSC_PROFILER
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void *JSCProfiler = dlopen(RCT_JSC_PROFILER_DYLIB, RTLD_NOW);
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if (JSCProfiler != NULL) {
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void (*nativeProfilerStart)(JSContextRef, const char *) =
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(__typeof__(nativeProfilerStart))dlsym(JSCProfiler, "nativeProfilerStart");
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void (*nativeProfilerEnd)(JSContextRef, const char *, const char *) =
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(__typeof__(nativeProfilerEnd))dlsym(JSCProfiler, "nativeProfilerEnd");
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if (nativeProfilerStart != NULL && nativeProfilerEnd != NULL) {
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void (*nativeProfilerEnableByteCode)(void) =
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(__typeof__(nativeProfilerEnableByteCode))dlsym(JSCProfiler, "nativeProfilerEnableByteCode");
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if (nativeProfilerEnableByteCode != NULL) {
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nativeProfilerEnableByteCode();
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}
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__block BOOL isProfiling = NO;
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[bridge.devMenu addItem:[RCTDevMenuItem buttonItemWithTitle:@"Profile" handler:^{
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if (isProfiling) {
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NSString *outputFile = [NSTemporaryDirectory() stringByAppendingPathComponent:@"cpu_profile.json"];
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nativeProfilerEnd(context, "profile", outputFile.UTF8String);
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NSData *profileData = [NSData dataWithContentsOfFile:outputFile
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options:NSDataReadingMappedIfSafe
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error:NULL];
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RCTProfileSendResult(bridge, @"cpu-profile", profileData);
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} else {
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nativeProfilerStart(context, "profile");
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}
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isProfiling = !isProfiling;
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}]];
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}
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}
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#endif
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}
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#endif
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+ (void)runRunLoopThread
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{
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@autoreleasepool {
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// copy thread name to pthread name
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pthread_setname_np([NSThread currentThread].name.UTF8String);
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// Set up a dummy runloop source to avoid spinning
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CFRunLoopSourceContext noSpinCtx = {0, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL};
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CFRunLoopSourceRef noSpinSource = CFRunLoopSourceCreate(NULL, 0, &noSpinCtx);
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CFRunLoopAddSource(CFRunLoopGetCurrent(), noSpinSource, kCFRunLoopDefaultMode);
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CFRelease(noSpinSource);
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// run the run loop
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while (kCFRunLoopRunStopped != CFRunLoopRunInMode(kCFRunLoopDefaultMode, ((NSDate *)[NSDate distantFuture]).timeIntervalSinceReferenceDate, NO)) {
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RCTAssert(NO, @"not reached assertion"); // runloop spun. that's bad.
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}
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}
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}
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- (instancetype)init
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{
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NSThread *javaScriptThread = [[NSThread alloc] initWithTarget:[self class]
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selector:@selector(runRunLoopThread)
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object:nil];
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javaScriptThread.name = @"com.facebook.React.JavaScript";
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javaScriptThread.threadPriority = [NSThread mainThread].threadPriority;
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[javaScriptThread start];
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return [self initWithJavaScriptThread:javaScriptThread globalContextRef:NULL];
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}
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- (instancetype)initWithJavaScriptThread:(NSThread *)javaScriptThread
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globalContextRef:(JSGlobalContextRef)context
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{
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RCTAssert(javaScriptThread != nil,
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@"Can't initialize RCTContextExecutor without a javaScriptThread");
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if ((self = [super init])) {
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_valid = YES;
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_javaScriptThread = javaScriptThread;
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__weak RCTContextExecutor *weakSelf = self;
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[self executeBlockOnJavaScriptQueue: ^{
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RCTContextExecutor *strongSelf = weakSelf;
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if (!strongSelf) {
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return;
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}
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// Assumes that no other JS tasks are scheduled before.
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JSGlobalContextRef ctx;
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if (context) {
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ctx = JSGlobalContextRetain(context);
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strongSelf->_context = [[RCTJavaScriptContext alloc] initWithJSContext:ctx];
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}
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}];
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}
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return self;
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}
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- (void)setUp
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{
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__weak RCTContextExecutor *weakSelf = self;
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[self executeBlockOnJavaScriptQueue:^{
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RCTContextExecutor *strongSelf = weakSelf;
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if (!strongSelf.isValid) {
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return;
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}
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if (!strongSelf->_context) {
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JSGlobalContextRef ctx = JSGlobalContextCreate(NULL);
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strongSelf->_context = [[RCTJavaScriptContext alloc] initWithJSContext:ctx];
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}
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[strongSelf _addNativeHook:RCTNativeLoggingHook withName:"nativeLoggingHook"];
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[strongSelf _addNativeHook:RCTNoop withName:"noop"];
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#if RCT_DEV
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[strongSelf _addNativeHook:RCTNativeTraceBeginSection withName:"nativeTraceBeginSection"];
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[strongSelf _addNativeHook:RCTNativeTraceEndSection withName:"nativeTraceEndSection"];
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RCTInstallJSCProfiler(_bridge, strongSelf->_context.ctx);
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for (NSString *event in @[RCTProfileDidStartProfiling, RCTProfileDidEndProfiling]) {
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[[NSNotificationCenter defaultCenter] addObserver:strongSelf
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selector:@selector(toggleProfilingFlag:)
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name:event
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object:nil];
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}
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#endif
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}];
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}
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- (void)toggleProfilingFlag:(NSNotification *)notification
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{
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JSObjectRef globalObject = JSContextGetGlobalObject(_context.ctx);
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bool enabled = [notification.name isEqualToString:RCTProfileDidStartProfiling];
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JSStringRef JSName = JSStringCreateWithUTF8CString("__BridgeProfilingIsProfiling");
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JSObjectSetProperty(_context.ctx,
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globalObject,
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JSName,
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JSValueMakeBoolean(_context.ctx, enabled),
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kJSPropertyAttributeNone,
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NULL);
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JSStringRelease(JSName);
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}
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- (void)_addNativeHook:(JSObjectCallAsFunctionCallback)hook withName:(const char *)name
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{
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JSObjectRef globalObject = JSContextGetGlobalObject(_context.ctx);
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JSStringRef JSName = JSStringCreateWithUTF8CString(name);
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JSObjectSetProperty(_context.ctx, globalObject, JSName, JSObjectMakeFunctionWithCallback(_context.ctx, JSName, hook), kJSPropertyAttributeNone, NULL);
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JSStringRelease(JSName);
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}
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- (void)invalidate
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{
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if (!self.isValid) {
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return;
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}
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_valid = NO;
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#if RCT_DEV
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[[NSNotificationCenter defaultCenter] removeObserver:self];
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#endif
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[_context performSelector:@selector(invalidate)
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onThread:_javaScriptThread
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withObject:nil
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waitUntilDone:NO];
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_context = nil;
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}
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- (void)dealloc
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{
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[self invalidate];
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}
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- (void)executeJSCall:(NSString *)name
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method:(NSString *)method
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arguments:(NSArray *)arguments
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callback:(RCTJavaScriptCallback)onComplete
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{
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RCTAssert(onComplete != nil, @"onComplete block should not be nil");
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__weak RCTContextExecutor *weakSelf = self;
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[self executeBlockOnJavaScriptQueue:RCTProfileBlock((^{
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RCTContextExecutor *strongSelf = weakSelf;
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if (!strongSelf || !strongSelf.isValid) {
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return;
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}
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NSError *error;
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NSString *argsString = (arguments.count == 1) ? RCTJSONStringify(arguments[0], &error) : RCTJSONStringify(arguments, &error);
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if (!argsString) {
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RCTLogError(@"Cannot convert argument to string: %@", error);
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onComplete(nil, error);
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return;
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}
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JSValueRef errorJSRef = NULL;
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JSValueRef resultJSRef = NULL;
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JSGlobalContextRef contextJSRef = JSContextGetGlobalContext(strongSelf->_context.ctx);
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JSObjectRef globalObjectJSRef = JSContextGetGlobalObject(strongSelf->_context.ctx);
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// get require
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JSStringRef requireNameJSStringRef = JSStringCreateWithUTF8CString("require");
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JSValueRef requireJSRef = JSObjectGetProperty(contextJSRef, globalObjectJSRef, requireNameJSStringRef, &errorJSRef);
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JSStringRelease(requireNameJSStringRef);
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if (requireJSRef != NULL && !JSValueIsUndefined(contextJSRef, requireJSRef) && errorJSRef == NULL) {
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// get module
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JSStringRef moduleNameJSStringRef = JSStringCreateWithCFString((__bridge CFStringRef)name);
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JSValueRef moduleNameJSRef = JSValueMakeString(contextJSRef, moduleNameJSStringRef);
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JSValueRef moduleJSRef = JSObjectCallAsFunction(contextJSRef, (JSObjectRef)requireJSRef, NULL, 1, (const JSValueRef *)&moduleNameJSRef, &errorJSRef);
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JSStringRelease(moduleNameJSStringRef);
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if (moduleJSRef != NULL && errorJSRef == NULL && !JSValueIsUndefined(contextJSRef, moduleJSRef)) {
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// get method
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JSStringRef methodNameJSStringRef = JSStringCreateWithCFString((__bridge CFStringRef)method);
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JSValueRef methodJSRef = JSObjectGetProperty(contextJSRef, (JSObjectRef)moduleJSRef, methodNameJSStringRef, &errorJSRef);
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JSStringRelease(methodNameJSStringRef);
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if (methodJSRef != NULL && errorJSRef == NULL) {
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// direct method invoke with no arguments
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if (arguments.count == 0) {
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resultJSRef = JSObjectCallAsFunction(contextJSRef, (JSObjectRef)methodJSRef, (JSObjectRef)moduleJSRef, 0, NULL, &errorJSRef);
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}
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// direct method invoke with 1 argument
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else if(arguments.count == 1) {
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JSStringRef argsJSStringRef = JSStringCreateWithCFString((__bridge CFStringRef)argsString);
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JSValueRef argsJSRef = JSValueMakeFromJSONString(contextJSRef, argsJSStringRef);
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resultJSRef = JSObjectCallAsFunction(contextJSRef, (JSObjectRef)methodJSRef, (JSObjectRef)moduleJSRef, 1, &argsJSRef, &errorJSRef);
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JSStringRelease(argsJSStringRef);
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} else {
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// apply invoke with array of arguments
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JSStringRef applyNameJSStringRef = JSStringCreateWithUTF8CString("apply");
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JSValueRef applyJSRef = JSObjectGetProperty(contextJSRef, (JSObjectRef)methodJSRef, applyNameJSStringRef, &errorJSRef);
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JSStringRelease(applyNameJSStringRef);
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if (applyJSRef != NULL && errorJSRef == NULL) {
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// invoke apply
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JSStringRef argsJSStringRef = JSStringCreateWithCFString((__bridge CFStringRef)argsString);
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JSValueRef argsJSRef = JSValueMakeFromJSONString(contextJSRef, argsJSStringRef);
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JSValueRef args[2];
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args[0] = JSValueMakeNull(contextJSRef);
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args[1] = argsJSRef;
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resultJSRef = JSObjectCallAsFunction(contextJSRef, (JSObjectRef)applyJSRef, (JSObjectRef)methodJSRef, 2, args, &errorJSRef);
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JSStringRelease(argsJSStringRef);
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}
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}
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}
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}
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}
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if (!resultJSRef) {
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onComplete(nil, RCTNSErrorFromJSError(contextJSRef, errorJSRef));
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return;
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}
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// Looks like making lots of JSC API calls is slower than communicating by using a JSON
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// string. Also it ensures that data stuctures don't have cycles and non-serializable fields.
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// see [RCTContextExecutorTests testDeserializationPerf]
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id objcValue;
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// We often return `null` from JS when there is nothing for native side. JSONKit takes an extra hundred microseconds
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// to handle this simple case, so we are adding a shortcut to make executeJSCall method even faster
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if (!JSValueIsNull(contextJSRef, resultJSRef)) {
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JSStringRef jsJSONString = JSValueCreateJSONString(contextJSRef, resultJSRef, 0, nil);
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if (jsJSONString) {
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NSString *objcJSONString = (__bridge_transfer NSString *)JSStringCopyCFString(kCFAllocatorDefault, jsJSONString);
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JSStringRelease(jsJSONString);
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objcValue = RCTJSONParse(objcJSONString, NULL);
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}
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}
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onComplete(objcValue, nil);
|
|
}), 0, @"js_call", (@{@"module":name, @"method": method, @"args": arguments}))];
|
|
}
|
|
|
|
- (void)executeApplicationScript:(NSString *)script
|
|
sourceURL:(NSURL *)sourceURL
|
|
onComplete:(RCTJavaScriptCompleteBlock)onComplete
|
|
{
|
|
RCTAssertParam(script);
|
|
RCTAssertParam(sourceURL);
|
|
|
|
__weak RCTContextExecutor *weakSelf = self;
|
|
[self executeBlockOnJavaScriptQueue:RCTProfileBlock((^{
|
|
RCTContextExecutor *strongSelf = weakSelf;
|
|
if (!strongSelf || !strongSelf.isValid) {
|
|
return;
|
|
}
|
|
|
|
RCTPerformanceLoggerStart(RCTPLScriptExecution);
|
|
JSValueRef jsError = NULL;
|
|
JSStringRef execJSString = JSStringCreateWithCFString((__bridge CFStringRef)script);
|
|
JSStringRef jsURL = JSStringCreateWithCFString((__bridge CFStringRef)sourceURL.absoluteString);
|
|
JSValueRef result = JSEvaluateScript(strongSelf->_context.ctx, execJSString, NULL, jsURL, 0, &jsError);
|
|
JSStringRelease(jsURL);
|
|
JSStringRelease(execJSString);
|
|
RCTPerformanceLoggerEnd(RCTPLScriptExecution);
|
|
|
|
if (onComplete) {
|
|
NSError *error;
|
|
if (!result) {
|
|
error = RCTNSErrorFromJSError(strongSelf->_context.ctx, jsError);
|
|
}
|
|
onComplete(error);
|
|
}
|
|
}), 0, @"js_call", (@{ @"url": sourceURL.absoluteString }))];
|
|
}
|
|
|
|
- (void)executeBlockOnJavaScriptQueue:(dispatch_block_t)block
|
|
{
|
|
if ([NSThread currentThread] != _javaScriptThread) {
|
|
[self performSelector:@selector(executeBlockOnJavaScriptQueue:)
|
|
onThread:_javaScriptThread withObject:block waitUntilDone:NO];
|
|
} else {
|
|
block();
|
|
}
|
|
}
|
|
|
|
- (void)executeAsyncBlockOnJavaScriptQueue:(dispatch_block_t)block
|
|
{
|
|
[self performSelector:@selector(executeBlockOnJavaScriptQueue:)
|
|
onThread:_javaScriptThread
|
|
withObject:block
|
|
waitUntilDone:NO];
|
|
}
|
|
|
|
- (void)_runBlock:(dispatch_block_t)block
|
|
{
|
|
block();
|
|
}
|
|
|
|
- (void)injectJSONText:(NSString *)script
|
|
asGlobalObjectNamed:(NSString *)objectName
|
|
callback:(RCTJavaScriptCompleteBlock)onComplete
|
|
{
|
|
if (RCT_DEBUG) {
|
|
RCTAssert(RCTJSONParse(script, NULL) != nil, @"%@ wasn't valid JSON!", script);
|
|
}
|
|
|
|
__weak RCTContextExecutor *weakSelf = self;
|
|
[self executeBlockOnJavaScriptQueue:RCTProfileBlock((^{
|
|
RCTContextExecutor *strongSelf = weakSelf;
|
|
if (!strongSelf || !strongSelf.isValid) {
|
|
return;
|
|
}
|
|
JSStringRef execJSString = JSStringCreateWithCFString((__bridge CFStringRef)script);
|
|
JSValueRef valueToInject = JSValueMakeFromJSONString(strongSelf->_context.ctx, execJSString);
|
|
JSStringRelease(execJSString);
|
|
|
|
if (!valueToInject) {
|
|
NSString *errorDesc = [NSString stringWithFormat:@"Can't make JSON value from script '%@'", script];
|
|
RCTLogError(@"%@", errorDesc);
|
|
|
|
if (onComplete) {
|
|
NSError *error = [NSError errorWithDomain:@"JS" code:2 userInfo:@{NSLocalizedDescriptionKey: errorDesc}];
|
|
onComplete(error);
|
|
}
|
|
return;
|
|
}
|
|
|
|
JSObjectRef globalObject = JSContextGetGlobalObject(strongSelf->_context.ctx);
|
|
JSStringRef JSName = JSStringCreateWithCFString((__bridge CFStringRef)objectName);
|
|
JSObjectSetProperty(strongSelf->_context.ctx, globalObject, JSName, valueToInject, kJSPropertyAttributeNone, NULL);
|
|
JSStringRelease(JSName);
|
|
if (onComplete) {
|
|
onComplete(nil);
|
|
}
|
|
}), 0, @"js_call,json_call", (@{@"objectName": objectName}))];
|
|
}
|
|
|
|
RCT_EXPORT_METHOD(setContextName:(nonnull NSString *)name)
|
|
{
|
|
if (JSGlobalContextSetName != NULL) {
|
|
JSStringRef JSName = JSStringCreateWithCFString((__bridge CFStringRef)name);
|
|
JSGlobalContextSetName(_context.ctx, JSName);
|
|
JSStringRelease(JSName);
|
|
}
|
|
}
|
|
|
|
@end
|