react-native/React/Profiler/RCTPerfMonitor.m

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/**
* Copyright (c) 2015-present, Facebook, Inc.
* All rights reserved.
*
* This source code is licensed under the BSD-style license found in the
* LICENSE file in the root directory of this source tree. An additional grant
* of patent rights can be found in the PATENTS file in the same directory.
*/
#import "RCTDefines.h"
#if RCT_DEV
#import <dlfcn.h>
#import <mach/mach.h>
#import "RCTBridge.h"
#import "RCTDevSettings.h"
#import "RCTFPSGraph.h"
#import "RCTInvalidating.h"
#import "RCTJavaScriptExecutor.h"
#import "RCTPerformanceLogger.h"
#import "RCTRootView.h"
#import "RCTUIManager.h"
#import "RCTBridge+Private.h"
#import "RCTUtils.h"
#if __has_include("RCTDevMenu.h")
#import "RCTDevMenu.h"
#endif
static NSString *const RCTPerfMonitorCellIdentifier = @"RCTPerfMonitorCellIdentifier";
static CGFloat const RCTPerfMonitorBarHeight = 50;
static CGFloat const RCTPerfMonitorExpandHeight = 250;
typedef BOOL (*RCTJSCSetOptionType)(const char *);
static BOOL RCTJSCSetOption(const char *option)
{
static RCTJSCSetOptionType setOption;
static dispatch_once_t onceToken;
dispatch_once(&onceToken, ^{
/**
* JSC private C++ static method to toggle options at runtime
*
* JSC::Options::setOptions - JavaScriptCore/runtime/Options.h
*/
setOption = dlsym(RTLD_DEFAULT, "_ZN3JSC7Options9setOptionEPKc");
if (RCT_DEBUG && setOption == NULL) {
RCTLogWarn(@"The symbol used to enable JSC runtime options is not available in this iOS version");
}
});
if (setOption) {
return setOption(option);
} else {
return NO;
}
}
static vm_size_t RCTGetResidentMemorySize(void)
{
struct task_basic_info info;
mach_msg_type_number_t size = sizeof(info);
kern_return_t kerr = task_info(mach_task_self(),
TASK_BASIC_INFO,
(task_info_t)&info,
&size);
if (kerr != KERN_SUCCESS) {
return 0;
}
return info.resident_size;
}
@interface RCTPerfMonitor : NSObject <RCTBridgeModule, RCTInvalidating, UITableViewDataSource, UITableViewDelegate>
#if __has_include("RCTDevMenu.h")
@property (nonatomic, strong, readonly) RCTDevMenuItem *devMenuItem;
#endif
@property (nonatomic, strong, readonly) UIPanGestureRecognizer *gestureRecognizer;
@property (nonatomic, strong, readonly) UIView *container;
@property (nonatomic, strong, readonly) UILabel *memory;
@property (nonatomic, strong, readonly) UILabel *heap;
@property (nonatomic, strong, readonly) UILabel *views;
@property (nonatomic, strong, readonly) UITableView *metrics;
@property (nonatomic, strong, readonly) RCTFPSGraph *jsGraph;
@property (nonatomic, strong, readonly) RCTFPSGraph *uiGraph;
@property (nonatomic, strong, readonly) UILabel *jsGraphLabel;
@property (nonatomic, strong, readonly) UILabel *uiGraphLabel;
@end
@implementation RCTPerfMonitor {
#if __has_include("RCTDevMenu.h")
RCTDevMenuItem *_devMenuItem;
#endif
UIPanGestureRecognizer *_gestureRecognizer;
UIView *_container;
UILabel *_memory;
UILabel *_heap;
UILabel *_views;
UILabel *_uiGraphLabel;
UILabel *_jsGraphLabel;
UITableView *_metrics;
RCTFPSGraph *_uiGraph;
RCTFPSGraph *_jsGraph;
CADisplayLink *_uiDisplayLink;
CADisplayLink *_jsDisplayLink;
NSUInteger _heapSize;
dispatch_queue_t _queue;
dispatch_io_t _io;
int _stderr;
int _pipe[2];
NSString *_remaining;
CGRect _storedMonitorFrame;
NSArray *_perfLoggerMarks;
}
@synthesize bridge = _bridge;
RCT_EXPORT_MODULE()
+ (BOOL)requiresMainQueueSetup
{
return YES;
}
- (dispatch_queue_t)methodQueue
{
return dispatch_get_main_queue();
}
- (void)setBridge:(RCTBridge *)bridge
{
_bridge = bridge;
#if __has_include("RCTDevMenu.h")
[_bridge.devMenu addItem:self.devMenuItem];
#endif
}
- (void)invalidate
{
[self hide];
}
#if __has_include("RCTDevMenu.h")
- (RCTDevMenuItem *)devMenuItem
{
if (!_devMenuItem) {
__weak __typeof__(self) weakSelf = self;
__weak RCTDevSettings *devSettings = self.bridge.devSettings;
_devMenuItem =
[RCTDevMenuItem buttonItemWithTitleBlock:^NSString *{
return (devSettings.isPerfMonitorShown) ?
@"Hide Perf Monitor" :
@"Show Perf Monitor";
} handler:^{
if (devSettings.isPerfMonitorShown) {
[weakSelf hide];
devSettings.isPerfMonitorShown = NO;
} else {
[weakSelf show];
devSettings.isPerfMonitorShown = YES;
}
}];
}
return _devMenuItem;
}
#endif
- (UIPanGestureRecognizer *)gestureRecognizer
{
if (!_gestureRecognizer) {
_gestureRecognizer = [[UIPanGestureRecognizer alloc] initWithTarget:self
action:@selector(gesture:)];
}
return _gestureRecognizer;
}
- (UIView *)container
{
if (!_container) {
_container = [[UIView alloc] initWithFrame:CGRectMake(10, 25, 180, RCTPerfMonitorBarHeight)];
_container.backgroundColor = UIColor.whiteColor;
_container.layer.borderWidth = 2;
_container.layer.borderColor = [UIColor lightGrayColor].CGColor;
[_container addGestureRecognizer:self.gestureRecognizer];
[_container addGestureRecognizer:[[UITapGestureRecognizer alloc] initWithTarget:self
action:@selector(tap)]];
}
return _container;
}
- (UILabel *)memory
{
if (!_memory) {
_memory = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, 44, RCTPerfMonitorBarHeight)];
_memory.font = [UIFont systemFontOfSize:12];
_memory.numberOfLines = 3;
_memory.textAlignment = NSTextAlignmentCenter;
}
return _memory;
}
- (UILabel *)heap
{
if (!_heap) {
_heap = [[UILabel alloc] initWithFrame:CGRectMake(44, 0, 44, RCTPerfMonitorBarHeight)];
_heap.font = [UIFont systemFontOfSize:12];
_heap.numberOfLines = 3;
_heap.textAlignment = NSTextAlignmentCenter;
}
return _heap;
}
- (UILabel *)views
{
if (!_views) {
_views = [[UILabel alloc] initWithFrame:CGRectMake(88, 0, 44, RCTPerfMonitorBarHeight)];
_views.font = [UIFont systemFontOfSize:12];
_views.numberOfLines = 3;
_views.textAlignment = NSTextAlignmentCenter;
}
return _views;
}
- (RCTFPSGraph *)uiGraph
{
if (!_uiGraph) {
_uiGraph = [[RCTFPSGraph alloc] initWithFrame:CGRectMake(134, 14, 40, 30)
color:[UIColor lightGrayColor]];
}
return _uiGraph;
}
- (RCTFPSGraph *)jsGraph
{
if (!_jsGraph) {
_jsGraph = [[RCTFPSGraph alloc] initWithFrame:CGRectMake(178, 14, 40, 30)
color:[UIColor lightGrayColor]];
}
return _jsGraph;
}
- (UILabel *)uiGraphLabel
{
if (!_uiGraphLabel) {
_uiGraphLabel = [[UILabel alloc] initWithFrame:CGRectMake(134, 3, 40, 10)];
_uiGraphLabel.font = [UIFont systemFontOfSize:11];
_uiGraphLabel.textAlignment = NSTextAlignmentCenter;
_uiGraphLabel.text = @"UI";
}
return _uiGraphLabel;
}
- (UILabel *)jsGraphLabel
{
if (!_jsGraphLabel) {
_jsGraphLabel = [[UILabel alloc] initWithFrame:CGRectMake(178, 3, 38, 10)];
_jsGraphLabel.font = [UIFont systemFontOfSize:11];
_jsGraphLabel.textAlignment = NSTextAlignmentCenter;
_jsGraphLabel.text = @"JS";
}
return _jsGraphLabel;
}
- (UITableView *)metrics
{
if (!_metrics) {
_metrics = [[UITableView alloc] initWithFrame:CGRectMake(
0,
RCTPerfMonitorBarHeight,
self.container.frame.size.width,
self.container.frame.size.height - RCTPerfMonitorBarHeight
)];
_metrics.dataSource = self;
_metrics.delegate = self;
_metrics.autoresizingMask = UIViewAutoresizingFlexibleHeight | UIViewAutoresizingFlexibleWidth;
[_metrics registerClass:[UITableViewCell class] forCellReuseIdentifier:RCTPerfMonitorCellIdentifier];
}
return _metrics;
}
- (void)show
{
if (_container) {
return;
}
[self.container addSubview:self.memory];
[self.container addSubview:self.heap];
[self.container addSubview:self.views];
[self.container addSubview:self.uiGraph];
[self.container addSubview:self.uiGraphLabel];
[self redirectLogs];
RCTJSCSetOption("logGC=1");
[self updateStats];
UIWindow *window = RCTSharedApplication().delegate.window;
[window addSubview:self.container];
_uiDisplayLink = [CADisplayLink displayLinkWithTarget:self
selector:@selector(threadUpdate:)];
[_uiDisplayLink addToRunLoop:[NSRunLoop mainRunLoop]
forMode:NSRunLoopCommonModes];
self.container.frame = (CGRect) {
self.container.frame.origin, {
self.container.frame.size.width + 44,
self.container.frame.size.height
}
};
[self.container addSubview:self.jsGraph];
[self.container addSubview:self.jsGraphLabel];
[_bridge dispatchBlock:^{
self->_jsDisplayLink = [CADisplayLink displayLinkWithTarget:self
selector:@selector(threadUpdate:)];
[self->_jsDisplayLink addToRunLoop:[NSRunLoop currentRunLoop]
forMode:NSRunLoopCommonModes];
} queue:RCTJSThread];
}
- (void)hide
{
if (!_container) {
return;
}
[self.container removeFromSuperview];
_container = nil;
_jsGraph = nil;
_uiGraph = nil;
RCTJSCSetOption("logGC=0");
[self stopLogs];
[_uiDisplayLink invalidate];
[_jsDisplayLink invalidate];
_uiDisplayLink = nil;
_jsDisplayLink = nil;
}
- (void)redirectLogs
{
_stderr = dup(STDERR_FILENO);
if (pipe(_pipe) != 0) {
return;
}
dup2(_pipe[1], STDERR_FILENO);
close(_pipe[1]);
__weak __typeof__(self) weakSelf = self;
_queue = dispatch_queue_create("com.facebook.react.RCTPerfMonitor", DISPATCH_QUEUE_SERIAL);
_io = dispatch_io_create(
DISPATCH_IO_STREAM,
_pipe[0],
_queue,
^(__unused int error) {});
dispatch_io_set_low_water(_io, 20);
dispatch_io_read(
_io,
0,
SIZE_MAX,
_queue,
^(__unused bool done, dispatch_data_t data, __unused int error) {
if (!data) {
return;
}
dispatch_data_apply(
data,
^bool(
__unused dispatch_data_t region,
__unused size_t offset,
const void *buffer,
size_t size
) {
write(self->_stderr, buffer, size);
NSString *log = [[NSString alloc] initWithBytes:buffer
length:size
encoding:NSUTF8StringEncoding];
[weakSelf parse:log];
return true;
});
});
}
- (void)stopLogs
{
dup2(_stderr, STDERR_FILENO);
dispatch_io_close(_io, 0);
}
- (void)parse:(NSString *)log
{
static NSRegularExpression *GCRegex;
static dispatch_once_t onceToken;
dispatch_once(&onceToken, ^{
NSString *pattern = @"\\[GC: [\\d\\.]+ \\wb => (Eden|Full)Collection, (?:Skipped copying|Did copy), ([\\d\\.]+) \\wb, [\\d.]+ \\ws\\]";
GCRegex = [NSRegularExpression regularExpressionWithPattern:pattern
options:0
error:nil];
});
if (_remaining) {
log = [_remaining stringByAppendingString:log];
_remaining = nil;
}
NSArray<NSString *> *lines = [log componentsSeparatedByString:@"\n"];
if (lines.count == 1) { // no newlines
_remaining = log;
return;
}
for (NSString *line in lines) {
NSTextCheckingResult *match = [GCRegex firstMatchInString:line options:0 range:NSMakeRange(0, line.length)];
if (match) {
NSString *heapSizeStr = [line substringWithRange:[match rangeAtIndex:2]];
_heapSize = [heapSizeStr integerValue];
}
}
}
- (void)updateStats
{
NSDictionary<NSNumber *, UIView *> *views = [_bridge.uiManager valueForKey:@"viewRegistry"];
NSUInteger viewCount = views.count;
NSUInteger visibleViewCount = 0;
for (UIView *view in views.allValues) {
if (view.window || view.superview.window) {
visibleViewCount++;
}
}
double mem = (double)RCTGetResidentMemorySize() / 1024 / 1024;
self.memory.text =[NSString stringWithFormat:@"RAM\n%.2lf\nMB", mem];
self.heap.text = [NSString stringWithFormat:@"JSC\n%.2lf\nMB", (double)_heapSize / 1024];
self.views.text = [NSString stringWithFormat:@"Views\n%lu\n%lu", (unsigned long)visibleViewCount, (unsigned long)viewCount];
__weak __typeof__(self) weakSelf = self;
dispatch_after(
dispatch_time(DISPATCH_TIME_NOW, (int64_t)(1 * NSEC_PER_SEC)),
dispatch_get_main_queue(),
^{
__strong __typeof__(weakSelf) strongSelf = weakSelf;
if (strongSelf && strongSelf->_container.superview) {
[strongSelf updateStats];
}
});
}
- (void)gesture:(UIPanGestureRecognizer *)gestureRecognizer
{
CGPoint translation = [gestureRecognizer translationInView:self.container.superview];
self.container.center = CGPointMake(
self.container.center.x + translation.x,
self.container.center.y + translation.y
);
[gestureRecognizer setTranslation:CGPointMake(0, 0)
inView:self.container.superview];
}
- (void)tap
{
[self loadPerformanceLoggerData];
if (CGRectIsEmpty(_storedMonitorFrame)) {
_storedMonitorFrame = CGRectMake(0, 20, self.container.window.frame.size.width, RCTPerfMonitorExpandHeight);
[self.container addSubview:self.metrics];
} else {
[_metrics reloadData];
}
[UIView animateWithDuration:.25 animations:^{
CGRect tmp = self.container.frame;
self.container.frame = self->_storedMonitorFrame;
self->_storedMonitorFrame = tmp;
}];
}
- (void)threadUpdate:(CADisplayLink *)displayLink
{
RCTFPSGraph *graph = displayLink == _jsDisplayLink ? _jsGraph : _uiGraph;
[graph onTick:displayLink.timestamp];
}
- (void)loadPerformanceLoggerData
{
NSUInteger i = 0;
NSMutableArray<NSString *> *data = [NSMutableArray new];
RCTPerformanceLogger *performanceLogger = [_bridge performanceLogger];
NSArray<NSNumber *> *values = [performanceLogger valuesForTags];
for (NSString *label in [performanceLogger labelsForTags]) {
long long value = values[i+1].longLongValue - values[i].longLongValue;
NSString *unit = @"ms";
if ([label hasSuffix:@"Size"]) {
unit = @"b";
} else if ([label hasSuffix:@"Count"]) {
unit = @"";
}
[data addObject:[NSString stringWithFormat:@"%@: %lld%@", label, value, unit]];
i += 2;
}
_perfLoggerMarks = [data copy];
}
#pragma mark - UITableViewDataSource
- (NSInteger)numberOfSectionsInTableView:(__unused UITableView *)tableView
{
return 1;
}
- (NSInteger)tableView:(__unused UITableView *)tableView
numberOfRowsInSection:(__unused NSInteger)section
{
return _perfLoggerMarks.count;
}
- (UITableViewCell *)tableView:(UITableView *)tableView
cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:RCTPerfMonitorCellIdentifier
forIndexPath:indexPath];
if (!cell) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault
reuseIdentifier:RCTPerfMonitorCellIdentifier];
}
cell.textLabel.text = _perfLoggerMarks[indexPath.row];
cell.textLabel.font = [UIFont systemFontOfSize:12];
return cell;
}
#pragma mark - UITableViewDelegate
- (CGFloat)tableView:(__unused UITableView *)tableView
heightForRowAtIndexPath:(__unused NSIndexPath *)indexPath
{
return 20;
}
@end
#endif