717 lines
19 KiB
Objective-C
717 lines
19 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 "RCTProfile.h"
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#import <dlfcn.h>
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#import <libkern/OSAtomic.h>
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#import <mach/mach.h>
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#import <objc/message.h>
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#import <objc/runtime.h>
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#import <UIKit/UIKit.h>
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#import "RCTAssert.h"
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#import "RCTBridge.h"
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#import "RCTBridge+Private.h"
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#import "RCTComponentData.h"
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#import "RCTDefines.h"
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#import "RCTLog.h"
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#import "RCTModuleData.h"
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#import "RCTUtils.h"
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#import "RCTUIManager.h"
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#import "RCTJSCExecutor.h"
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NSString *const RCTProfileDidStartProfiling = @"RCTProfileDidStartProfiling";
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NSString *const RCTProfileDidEndProfiling = @"RCTProfileDidEndProfiling";
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#if RCT_DEV
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#pragma mark - Constants
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NSString *const RCTProfileTraceEvents = @"traceEvents";
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NSString *const RCTProfileSamples = @"samples";
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NSString *const RCTProfilePrefix = @"rct_profile_";
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#pragma mark - Variables
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// This is actually a BOOL - but has to be compatible with OSAtomic
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static volatile uint32_t RCTProfileProfiling;
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static NSDictionary *RCTProfileInfo;
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static NSMutableDictionary *RCTProfileOngoingEvents;
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static NSTimeInterval RCTProfileStartTime;
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static NSUInteger RCTProfileEventID = 0;
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static CADisplayLink *RCTProfileDisplayLink;
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#pragma mark - Macros
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#define RCTProfileAddEvent(type, props...) \
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[RCTProfileInfo[type] addObject:@{ \
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@"pid": @([[NSProcessInfo processInfo] processIdentifier]), \
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props \
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}];
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#define CHECK(...) \
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if (!RCTProfileIsProfiling()) { \
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return __VA_ARGS__; \
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}
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#pragma mark - systrace glue code
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static RCTProfileCallbacks *callbacks;
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static char *systrace_buffer;
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static systrace_arg_t *RCTProfileSystraceArgsFromNSDictionary(NSDictionary *args)
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{
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if (args.count == 0) {
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return NULL;
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}
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systrace_arg_t *systrace_args = malloc(sizeof(systrace_arg_t) * args.count);
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__block size_t i = 0;
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[args enumerateKeysAndObjectsUsingBlock:^(id key, id value, __unused BOOL *stop) {
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const char *keyc = [key description].UTF8String;
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systrace_args[i].key = keyc;
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systrace_args[i].key_len = (int)strlen(keyc);
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const char *valuec = RCTJSONStringify(value, NULL).UTF8String;
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systrace_args[i].value = valuec;
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systrace_args[i].value_len = (int)strlen(valuec);
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i++;
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}];
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return systrace_args;
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}
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void RCTProfileRegisterCallbacks(RCTProfileCallbacks *cb)
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{
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callbacks = cb;
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}
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#pragma mark - Private Helpers
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static NSNumber *RCTProfileTimestamp(NSTimeInterval timestamp)
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{
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return @((timestamp - RCTProfileStartTime) * 1e6);
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}
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static NSString *RCTProfileMemory(vm_size_t memory)
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{
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double mem = ((double)memory) / 1024 / 1024;
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return [NSString stringWithFormat:@"%.2lfmb", mem];
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}
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static NSDictionary *RCTProfileGetMemoryUsage(void)
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{
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struct task_basic_info info;
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mach_msg_type_number_t size = sizeof(info);
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kern_return_t kerr = task_info(mach_task_self(),
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TASK_BASIC_INFO,
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(task_info_t)&info,
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&size);
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if( kerr == KERN_SUCCESS ) {
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return @{
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@"suspend_count": @(info.suspend_count),
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@"virtual_size": RCTProfileMemory(info.virtual_size),
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@"resident_size": RCTProfileMemory(info.resident_size),
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};
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} else {
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return @{};
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}
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}
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static NSDictionary *RCTProfileMergeArgs(NSDictionary *args0, NSDictionary *args1)
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{
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args0 = RCTNilIfNull(args0);
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args1 = RCTNilIfNull(args1);
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if (!args0 && args1) {
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args0 = args1;
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} else if (args0 && args1) {
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NSMutableDictionary *d = [args0 mutableCopy];
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[d addEntriesFromDictionary:args1];
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args0 = [d copy];
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}
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return RCTNullIfNil(args0);
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}
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#pragma mark - Module hooks
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static const char *RCTProfileProxyClassName(Class class)
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{
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return [RCTProfilePrefix stringByAppendingString:NSStringFromClass(class)].UTF8String;
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}
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static dispatch_group_t RCTProfileGetUnhookGroup(void)
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{
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static dispatch_group_t unhookGroup;
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static dispatch_once_t onceToken;
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dispatch_once(&onceToken, ^{
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unhookGroup = dispatch_group_create();
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});
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return unhookGroup;
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}
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RCT_EXTERN IMP RCTProfileGetImplementation(id obj, SEL cmd);
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IMP RCTProfileGetImplementation(id obj, SEL cmd)
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{
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return class_getMethodImplementation([obj class], cmd);
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}
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/**
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* For the profiling we have to execute some code before and after every
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* function being profiled, the only way of doing that with pure Objective-C is
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* by using `-forwardInvocation:`, which is slow and could skew the profile
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* results.
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*
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* The alternative in assembly is much simpler, we just need to store all the
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* state at the beginning of the function, start the profiler, restore all the
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* state, call the actual function we want to profile and stop the profiler.
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*
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* The implementation can be found in RCTProfileTrampoline-<arch>.s where arch
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* is one of: i386, x86_64, arm, arm64.
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*/
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#if defined(__i386__) || \
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defined(__x86_64__) || \
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defined(__arm__) || \
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defined(__arm64__)
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RCT_EXTERN void RCTProfileTrampoline(void);
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#else
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static void *RCTProfileTrampoline = NULL;
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#endif
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RCT_EXTERN void RCTProfileTrampolineStart(id, SEL);
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void RCTProfileTrampolineStart(id self, SEL cmd)
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{
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/**
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* This call might be during dealloc, so we shouldn't retain the object in the
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* block.
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*/
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Class klass = [self class];
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RCT_PROFILE_BEGIN_EVENT(0, [NSString stringWithFormat:@"-[%s %s]", class_getName(klass), sel_getName(cmd)], nil);
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}
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RCT_EXTERN void RCTProfileTrampolineEnd(void);
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void RCTProfileTrampolineEnd(void)
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{
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RCT_PROFILE_END_EVENT(0, @"objc_call,modules,auto", nil);
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}
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static void RCTProfileHookInstance(id instance)
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{
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Class moduleClass = object_getClass(instance);
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/**
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* We swizzle the instance -class method to return the original class, but
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* object_getClass will return the actual class.
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*
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* If they are different, it means that the object is returning the original
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* class, but it's actual class is the proxy subclass we created.
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*/
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if ([instance class] != moduleClass) {
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return;
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}
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Class proxyClass = objc_allocateClassPair(moduleClass, RCTProfileProxyClassName(moduleClass), 0);
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if (!proxyClass) {
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proxyClass = objc_getClass(RCTProfileProxyClassName(moduleClass));
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if (proxyClass) {
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object_setClass(instance, proxyClass);
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}
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return;
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}
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unsigned int methodCount;
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Method *methods = class_copyMethodList(moduleClass, &methodCount);
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for (NSUInteger i = 0; i < methodCount; i++) {
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Method method = methods[i];
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SEL selector = method_getName(method);
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/**
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* Bail out on struct returns (except arm64) - we don't use it enough
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* to justify writing a stret version
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*/
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#ifdef __arm64__
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BOOL returnsStruct = NO;
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#else
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const char *typeEncoding = method_getTypeEncoding(method);
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// bail out on structs and unions (since they might contain structs)
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BOOL returnsStruct = typeEncoding[0] == '{' || typeEncoding[0] == '(';
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#endif
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/**
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* Avoid hooking into NSObject methods, methods generated by React Native
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* and special methods that start `.` (e.g. .cxx_destruct)
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*/
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if ([NSStringFromSelector(selector) hasPrefix:@"rct"] || [NSObject instancesRespondToSelector:selector] || sel_getName(selector)[0] == '.' || returnsStruct) {
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continue;
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}
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const char *types = method_getTypeEncoding(method);
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class_addMethod(proxyClass, selector, (IMP)RCTProfileTrampoline, types);
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}
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free(methods);
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class_replaceMethod(object_getClass(proxyClass), @selector(initialize), imp_implementationWithBlock(^{}), "v@:");
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for (Class cls in @[proxyClass, object_getClass(proxyClass)]) {
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Method oldImp = class_getInstanceMethod(cls, @selector(class));
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class_replaceMethod(cls, @selector(class), imp_implementationWithBlock(^{ return moduleClass; }), method_getTypeEncoding(oldImp));
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}
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objc_registerClassPair(proxyClass);
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object_setClass(instance, proxyClass);
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}
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static UIView *(*originalCreateView)(RCTComponentData *, SEL, NSNumber *);
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RCT_EXTERN UIView *RCTProfileCreateView(RCTComponentData *self, SEL _cmd, NSNumber *tag);
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UIView *RCTProfileCreateView(RCTComponentData *self, SEL _cmd, NSNumber *tag)
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{
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UIView *view = originalCreateView(self, _cmd, tag);
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RCTProfileHookInstance(view);
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return view;
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}
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void RCTProfileHookModules(RCTBridge *bridge)
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{
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#pragma clang diagnostic push
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#pragma clang diagnostic ignored "-Wtautological-pointer-compare"
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if (RCTProfileTrampoline == NULL) {
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return;
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}
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#pragma clang diagnostic pop
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for (RCTModuleData *moduleData in [bridge valueForKey:@"moduleDataByID"]) {
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[bridge dispatchBlock:^{
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RCTProfileHookInstance(moduleData.instance);
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} queue:moduleData.methodQueue];
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}
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dispatch_async(dispatch_get_main_queue(), ^{
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for (id view in [bridge.uiManager valueForKey:@"viewRegistry"]) {
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RCTProfileHookInstance([bridge.uiManager viewForReactTag:view]);
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}
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Method createView = class_getInstanceMethod([RCTComponentData class], @selector(createViewWithTag:));
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if (method_getImplementation(createView) != (IMP)RCTProfileCreateView) {
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originalCreateView = (typeof(originalCreateView))method_getImplementation(createView);
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method_setImplementation(createView, (IMP)RCTProfileCreateView);
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}
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});
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}
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static void RCTProfileUnhookInstance(id instance)
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{
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if ([instance class] != object_getClass(instance)) {
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object_setClass(instance, [instance class]);
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}
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}
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void RCTProfileUnhookModules(RCTBridge *bridge)
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{
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dispatch_group_enter(RCTProfileGetUnhookGroup());
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for (RCTModuleData *moduleData in [bridge valueForKey:@"moduleDataByID"]) {
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RCTProfileUnhookInstance(moduleData.instance);
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}
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dispatch_async(dispatch_get_main_queue(), ^{
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for (id view in [bridge.uiManager valueForKey:@"viewRegistry"]) {
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RCTProfileUnhookInstance(view);
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}
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dispatch_group_leave(RCTProfileGetUnhookGroup());
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});
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}
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#pragma mark - Private ObjC class only used for the vSYNC CADisplayLink target
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@interface RCTProfile : NSObject
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@end
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@implementation RCTProfile
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+ (void)vsync:(CADisplayLink *)displayLink
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{
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RCTProfileImmediateEvent(0, @"VSYNC", displayLink.timestamp, 'g');
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}
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@end
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#pragma mark - Public Functions
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dispatch_queue_t RCTProfileGetQueue(void)
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{
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static dispatch_queue_t queue;
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static dispatch_once_t onceToken;
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dispatch_once(&onceToken, ^{
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queue = dispatch_queue_create("com.facebook.react.Profiler", DISPATCH_QUEUE_SERIAL);
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});
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return queue;
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}
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BOOL RCTProfileIsProfiling(void)
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{
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return (BOOL)RCTProfileProfiling;
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}
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void RCTProfileInit(RCTBridge *bridge)
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{
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// TODO: enable assert JS thread from any file (and assert here)
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if (RCTProfileIsProfiling()) {
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return;
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}
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OSAtomicOr32Barrier(1, &RCTProfileProfiling);
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if (callbacks != NULL) {
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size_t buffer_size = 1 << 22;
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systrace_buffer = calloc(1, buffer_size);
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callbacks->start(~((uint64_t)0), systrace_buffer, buffer_size);
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} else {
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NSTimeInterval time = CACurrentMediaTime();
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dispatch_async(RCTProfileGetQueue(), ^{
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RCTProfileStartTime = time;
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RCTProfileOngoingEvents = [NSMutableDictionary new];
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RCTProfileInfo = @{
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RCTProfileTraceEvents: [NSMutableArray new],
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RCTProfileSamples: [NSMutableArray new],
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};
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});
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}
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// Set up thread ordering
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dispatch_async(RCTProfileGetQueue(), ^{
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NSString *shadowQueue = @(dispatch_queue_get_label([[bridge uiManager] methodQueue]));
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NSArray *orderedThreads = @[@"JS async", RCTJSCThreadName, shadowQueue, @"main"];
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[orderedThreads enumerateObjectsUsingBlock:^(NSString *thread, NSUInteger idx, BOOL *stop) {
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RCTProfileAddEvent(RCTProfileTraceEvents,
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@"ph": @"M", // metadata event
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@"name": @"thread_sort_index",
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@"tid": thread,
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@"args": @{ @"sort_index": @(-1000 + (NSInteger)idx) }
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);
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}];
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});
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RCTProfileHookModules(bridge);
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RCTProfileDisplayLink = [CADisplayLink displayLinkWithTarget:[RCTProfile class]
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selector:@selector(vsync:)];
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[RCTProfileDisplayLink addToRunLoop:[NSRunLoop mainRunLoop]
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forMode:NSRunLoopCommonModes];
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[[NSNotificationCenter defaultCenter] postNotificationName:RCTProfileDidStartProfiling
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object:bridge];
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}
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void RCTProfileEnd(RCTBridge *bridge, void (^callback)(NSString *))
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{
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// assert JavaScript thread here again
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if (!RCTProfileIsProfiling()) {
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return;
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}
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OSAtomicAnd32Barrier(0, &RCTProfileProfiling);
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[[NSNotificationCenter defaultCenter] postNotificationName:RCTProfileDidEndProfiling
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object:bridge];
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[RCTProfileDisplayLink invalidate];
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RCTProfileDisplayLink = nil;
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RCTProfileUnhookModules(bridge);
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if (callbacks != NULL) {
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callbacks->stop();
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callback(@(systrace_buffer));
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} else {
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dispatch_async(RCTProfileGetQueue(), ^{
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NSString *log = RCTJSONStringify(RCTProfileInfo, NULL);
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RCTProfileEventID = 0;
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RCTProfileInfo = nil;
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RCTProfileOngoingEvents = nil;
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callback(log);
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});
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}
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}
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static NSMutableArray<NSArray *> *RCTProfileGetThreadEvents(NSThread *thread)
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{
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static NSString *const RCTProfileThreadEventsKey = @"RCTProfileThreadEventsKey";
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NSMutableArray<NSArray *> *threadEvents =
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thread.threadDictionary[RCTProfileThreadEventsKey];
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if (!threadEvents) {
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threadEvents = [NSMutableArray new];
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thread.threadDictionary[RCTProfileThreadEventsKey] = threadEvents;
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}
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return threadEvents;
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}
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void _RCTProfileBeginEvent(
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NSThread *calleeThread,
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NSTimeInterval time,
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uint64_t tag,
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NSString *name,
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NSDictionary *args
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) {
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CHECK();
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RCTAssertThread(RCTProfileGetQueue(), @"Must be called RCTProfile queue");;
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if (callbacks != NULL) {
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callbacks->begin_section(tag, name.UTF8String, args.count, RCTProfileSystraceArgsFromNSDictionary(args));
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return;
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}
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NSMutableArray *events = RCTProfileGetThreadEvents(calleeThread);
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[events addObject:@[
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RCTProfileTimestamp(time),
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name,
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RCTNullIfNil(args),
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]];
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}
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void _RCTProfileEndEvent(
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NSThread *calleeThread,
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NSString *threadName,
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NSTimeInterval time,
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uint64_t tag,
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NSString *category,
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NSDictionary *args
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) {
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CHECK();
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RCTAssertThread(RCTProfileGetQueue(), @"Must be called RCTProfile queue");;
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if (callbacks != NULL) {
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callbacks->end_section(tag, args.count, RCTProfileSystraceArgsFromNSDictionary(args));
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return;
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}
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NSMutableArray<NSArray *> *events = RCTProfileGetThreadEvents(calleeThread);
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NSArray *event = events.lastObject;
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[events removeLastObject];
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if (!event) {
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return;
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}
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NSNumber *start = event[0];
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RCTProfileAddEvent(RCTProfileTraceEvents,
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@"tid": threadName,
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@"name": event[1],
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@"cat": category,
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@"ph": @"X",
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@"ts": start,
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@"dur": @(RCTProfileTimestamp(time).doubleValue - start.doubleValue),
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@"args": RCTProfileMergeArgs(event[2], args),
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);
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}
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NSUInteger RCTProfileBeginAsyncEvent(
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uint64_t tag,
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NSString *name,
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NSDictionary *args
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) {
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CHECK(0);
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static NSUInteger eventID = 0;
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NSTimeInterval time = CACurrentMediaTime();
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NSUInteger currentEventID = ++eventID;
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|
if (callbacks != NULL) {
|
|
callbacks->begin_async_section(tag, name.UTF8String, (int)(currentEventID % INT_MAX), args.count, RCTProfileSystraceArgsFromNSDictionary(args));
|
|
} else {
|
|
dispatch_async(RCTProfileGetQueue(), ^{
|
|
RCTProfileOngoingEvents[@(currentEventID)] = @[
|
|
RCTProfileTimestamp(time),
|
|
name,
|
|
RCTNullIfNil(args),
|
|
];
|
|
});
|
|
}
|
|
|
|
return currentEventID;
|
|
}
|
|
|
|
void RCTProfileEndAsyncEvent(
|
|
uint64_t tag,
|
|
NSString *category,
|
|
NSUInteger cookie,
|
|
NSString *name,
|
|
NSString *threadName,
|
|
NSDictionary *args
|
|
) {
|
|
CHECK();
|
|
|
|
if (callbacks != NULL) {
|
|
callbacks->end_async_section(tag, name.UTF8String, (int)(cookie % INT_MAX), args.count, RCTProfileSystraceArgsFromNSDictionary(args));
|
|
return;
|
|
}
|
|
|
|
NSTimeInterval time = CACurrentMediaTime();
|
|
|
|
dispatch_async(RCTProfileGetQueue(), ^{
|
|
NSArray *event = RCTProfileOngoingEvents[@(cookie)];
|
|
|
|
if (event) {
|
|
NSNumber *endTimestamp = RCTProfileTimestamp(time);
|
|
|
|
RCTProfileAddEvent(RCTProfileTraceEvents,
|
|
@"tid": threadName,
|
|
@"name": event[1],
|
|
@"cat": category,
|
|
@"ph": @"X",
|
|
@"ts": event[0],
|
|
@"dur": @(endTimestamp.doubleValue - [event[0] doubleValue]),
|
|
@"args": RCTProfileMergeArgs(event[2], args),
|
|
);
|
|
[RCTProfileOngoingEvents removeObjectForKey:@(cookie)];
|
|
}
|
|
});
|
|
}
|
|
|
|
void RCTProfileImmediateEvent(
|
|
uint64_t tag,
|
|
NSString *name,
|
|
NSTimeInterval time,
|
|
char scope
|
|
) {
|
|
CHECK();
|
|
|
|
if (callbacks != NULL) {
|
|
callbacks->instant_section(tag, name.UTF8String, scope);
|
|
return;
|
|
}
|
|
|
|
NSString *threadName = RCTCurrentThreadName();
|
|
|
|
dispatch_async(RCTProfileGetQueue(), ^{
|
|
RCTProfileAddEvent(RCTProfileTraceEvents,
|
|
@"tid": threadName,
|
|
@"name": name,
|
|
@"ts": RCTProfileTimestamp(time),
|
|
@"scope": @(scope),
|
|
@"ph": @"i",
|
|
@"args": RCTProfileGetMemoryUsage(),
|
|
);
|
|
});
|
|
}
|
|
|
|
NSNumber *_RCTProfileBeginFlowEvent(void)
|
|
{
|
|
static NSUInteger flowID = 0;
|
|
|
|
CHECK(@0);
|
|
|
|
if (callbacks != NULL) {
|
|
// flow events not supported yet
|
|
return @0;
|
|
}
|
|
|
|
NSTimeInterval time = CACurrentMediaTime();
|
|
NSNumber *currentID = @(++flowID);
|
|
NSString *threadName = RCTCurrentThreadName();
|
|
|
|
dispatch_async(RCTProfileGetQueue(), ^{
|
|
RCTProfileAddEvent(RCTProfileTraceEvents,
|
|
@"tid": threadName,
|
|
@"name": @"flow",
|
|
@"id": currentID,
|
|
@"cat": @"flow",
|
|
@"ph": @"s",
|
|
@"ts": RCTProfileTimestamp(time),
|
|
);
|
|
|
|
});
|
|
|
|
return currentID;
|
|
}
|
|
|
|
void _RCTProfileEndFlowEvent(NSNumber *flowID)
|
|
{
|
|
CHECK();
|
|
|
|
if (callbacks != NULL) {
|
|
return;
|
|
}
|
|
|
|
NSTimeInterval time = CACurrentMediaTime();
|
|
NSString *threadName = RCTCurrentThreadName();
|
|
|
|
dispatch_async(RCTProfileGetQueue(), ^{
|
|
RCTProfileAddEvent(RCTProfileTraceEvents,
|
|
@"tid": threadName,
|
|
@"name": @"flow",
|
|
@"id": flowID,
|
|
@"cat": @"flow",
|
|
@"ph": @"f",
|
|
@"ts": RCTProfileTimestamp(time),
|
|
);
|
|
});
|
|
}
|
|
|
|
void RCTProfileSendResult(RCTBridge *bridge, NSString *route, NSData *data)
|
|
{
|
|
if (![bridge.bundleURL.scheme hasPrefix:@"http"]) {
|
|
RCTLogWarn(@"Cannot upload profile information because you're not connected to the packager. The profiling data is still saved in the app container.");
|
|
return;
|
|
}
|
|
|
|
NSURL *URL = [NSURL URLWithString:[@"/" stringByAppendingString:route] relativeToURL:bridge.bundleURL];
|
|
|
|
NSMutableURLRequest *URLRequest = [NSMutableURLRequest requestWithURL:URL];
|
|
URLRequest.HTTPMethod = @"POST";
|
|
[URLRequest setValue:@"application/json"
|
|
forHTTPHeaderField:@"Content-Type"];
|
|
|
|
NSURLSessionTask *task =
|
|
[[NSURLSession sharedSession] uploadTaskWithRequest:URLRequest
|
|
fromData:data
|
|
completionHandler:
|
|
^(NSData *responseData, __unused NSURLResponse *response, NSError *error) {
|
|
if (error) {
|
|
RCTLogError(@"%@", error.localizedDescription);
|
|
} else {
|
|
NSString *message = [[NSString alloc] initWithData:responseData
|
|
encoding:NSUTF8StringEncoding];
|
|
|
|
if (message.length) {
|
|
dispatch_async(dispatch_get_main_queue(), ^{
|
|
[[[UIAlertView alloc] initWithTitle:@"Profile"
|
|
message:message
|
|
delegate:nil
|
|
cancelButtonTitle:@"OK"
|
|
otherButtonTitles:nil] show];
|
|
});
|
|
}
|
|
}
|
|
}];
|
|
|
|
[task resume];
|
|
}
|
|
|
|
#endif
|