134355 2014-06-26 12:42:21 -0700 Serious canvas memory leak in iOS 7.1.1. 2020-05-21 10:53:46 -0700 1 1 1 Unclassified WebKit Canvas 528+ (Nightly build) iPhone / iPad iOS 7.0 NEW https://bugs.webkit.org/show_bug.cgi?id=212214 http://stackoverflow.com/questions/24387541/ios-7-1-1-canvas-drawimage-memory-leak/ InRadar P2 Critical --- 1 aga webkit-unassigned dino jonlee nicolas.ramz public simon.fraser webkit-bug-importer oldest_to_newest 1018711 0 aga 2014-06-26 12:42:21 -0700 Not sure if this is an internal iOS issue or not, but in Safari on iOS 7.1.1 there is a serious canvas memory leak: http://stackoverflow.com/questions/24387541/ios-7-1-1-canvas-drawimage-memory-leak/ : ctx.drawImage(anotherCanvas, clipX, clipY, clipW, clipH, x, y, w, h) --> memory leak. ctx.drawImage(anotherCanvas, x, y, w, h) --> no memory leak. 1018808 1 simon.fraser 2014-06-26 17:10:53 -0700 How did you determine that this causes a memory leak? 1019175 2 aga 2014-06-27 20:45:32 -0700 I may have been a bit hasty. This may not be a memory leak... I did find an audio memory leak in my web-app... I think that is the problem... although this might be a problem in and of itself. https://bugs.webkit.org/show_bug.cgi?id=134425 1023555 3 235190 public 2014-07-20 12:47:34 -0700 Created attachment 235190 Test case A customer of mine reported an issue application using UIWebView. It would become slow and eventually crash after quite some time. I have since investigated the issue and have to confirm the original report. Tests were done using iOS 7.1.2. If the allocation traces by Instruments.app are to be believed, the leaks is in the vicinity of WebCore/platform/graphics/cg/ImageSourceCG.cpp, but I'm not familiar enough with WebKit/WebCore to be certain. It may also be an issue in Apple prorietary code. The attached test case can be used to reproduce the issue reliably. The test image was a PNG file with 768×576px. Another test used a file with 981×820px. I haven't succeeded in getting allocation traces using Mobile Safari, but in a custom application the memory consumption increased at a steady 1.2-1.4 MB per 1'000 frames. 1025059 4 public 2014-07-27 15:12:36 -0700 Since my last update I did a few more tests using an iPhone 4 running iOS 7.1.2. Here's how to reproduce the issue without Cordova/PhoneGap: - Put test case HTML on a webserver - Put image with at least 800×800px as “test.png” on web server (not sure if the size is relevant) - Create new iOS Single View Application project in Xcode - Open iOS storyboard - Add UIWebView element - Add outlet for web view to ViewController.m - Add the following code to -[ViewController viewDidLoad] (make sure to use the correct URL): [_webview loadRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:@"http://server:8080/"]]]; - Run program on iPhone and watch its memory usage using Instruments.app When I look at the allocation summary, the IOAccelResource category keeps increasing at a rate of about 24 KB/sec (measured over 8 minutes after a warm-up period of half a minute). CGImageProvider and CGImage keep allocating memory, too. Tests with more than one image did not, as far as I could tell, change the numbers in a significant way. Interestingly this doesn't even seem to be the same issue that I see in my client's application. All I know is that something somewhere is leaking. 1025068 5 simon.fraser 2014-07-27 16:15:27 -0700 (In reply to comment #4) > Since my last update I did a few more tests using an iPhone 4 running iOS 7.1.2. Here's how to reproduce the issue without Cordova/PhoneGap: > > - Put test case HTML on a webserver > - Put image with at least 800×800px as “test.png” on web server (not sure if the size is relevant) > - Create new iOS Single View Application project in Xcode > - Open iOS storyboard > - Add UIWebView element > - Add outlet for web view to ViewController.m > - Add the following code to -[ViewController viewDidLoad] (make sure to use the correct URL): > [_webview loadRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:@"http://server:8080/"]]]; > - Run program on iPhone and watch its memory usage using Instruments.app > > When I look at the allocation summary, the IOAccelResource category keeps increasing at a rate of about 24 KB/sec (measured over 8 minutes after a warm-up period of half a minute). CGImageProvider and CGImage keep allocating memory, too. > > Tests with more than one image did not, as far as I could tell, change the numbers in a significant way. > > Interestingly this doesn't even seem to be the same issue that I see in my client's application. All I know is that something somewhere is leaking. If you haven't already, please file a bug a bugreporter.apple.com with a test application that can be run out of the box. Have you tested any iOS 8 seeds for this bug? 1025070 6 public 2014-07-27 16:20:27 -0700 (In reply to comment #5) > If you haven't already, please file a bug a bugreporter.apple.com with a test application that can be run out of the box. I'm in the process of preparing that, but I wanted to document my discoveries publically. In addition I want to make a minimal example for the exact case we have in my customer's application first. > Have you tested any iOS 8 seeds for this bug? Unfortunately not. My only test device is an iPhone 4, which isn't supported by iOS 8. 1025091 7 public 2014-07-27 20:25:57 -0700 (In reply to comment #5) > If you haven't already, please file a bug a bugreporter.apple.com with a test application that can be run out of the box. I have created a report there now. The ID is 17825107. 1100539 8 nicolas.ramz 2015-06-08 17:58:51 -0700 I'm not sure this is related, but I have a piece of code that crashes Safari on iOS 7/8 (crashes the whole app on iOS 7, crashes current tab only on iOS 8): http://experiments.warpdesign.fr/iOSCanvasBug/ It happens when calling ctx.drawImage() using a canvas as source. 1100548 9 simon.fraser 2015-06-08 18:28:59 -0700 Please try the iOS 9 beta. 1546314 10 jonlee 2019-06-19 17:20:12 -0700 rdar://problem/17825107 235190 2014-07-20 12:47:34 -0700 2014-07-20 12:47:34 -0700 Test case bug134355.html text/html 1082 public PCFET0NUWVBFIGh0bWw+CjxodG1sPgo8aGVhZD4KPG1ldGEgY2hhcnNldD0idXRmLTgiIC8+Cjxt ZXRhIG5hbWU9InZpZXdwb3J0IiBjb250ZW50PSJ3aWR0aD1kZXZpY2Utd2lkdGgsIGluaXRpYWwt c2NhbGU9MS4wLCBtYXhpbXVtLXNjYWxlPTEuMCwgdXNlci1zY2FsYWJsZT1ubyIgLz4KPC9oZWFk Pgo8Ym9keT4KPGNhbnZhcyBpZD0iY2FudmFzIiB3aWR0aD0iNjQwIiBoZWlnaHQ9IjQ4MCI+PC9j YW52YXM+Cgo8c2NyaXB0IHR5cGU9InRleHQvamF2YXNjcmlwdCI+CnZhciBpbWcgPSBuZXcgSW1h Z2U7Cgp2YXIgY2FudmFzID0gZG9jdW1lbnQuZ2V0RWxlbWVudEJ5SWQoImNhbnZhcyIpOwp2YXIg Y3R4ID0gY2FudmFzLmdldENvbnRleHQoIjJkIik7Cgp2YXIgeG9mZiA9IDA7CnZhciB5b2ZmID0g MDsKCnZhciBmcmFtZXMgPSAwOwoKdmFyIGYgPSBmdW5jdGlvbiAoKSB7CiAgdmFyIHcgPSBNYXRo Lm1pbihpbWcud2lkdGggLSB4b2ZmLCBjYW52YXMud2lkdGgpOwogIHZhciBoID0gTWF0aC5taW4o aW1nLmhlaWdodCAtIHlvZmYsIGNhbnZhcy5oZWlnaHQpOwoKICBjdHguY2xlYXJSZWN0KDAsIDAs IGNhbnZhcy53aWR0aCwgY2FudmFzLmhlaWdodCk7CgogIGlmICgxKSB7CiAgICBjdHguZHJhd0lt YWdlKGltZywgeG9mZiwgeW9mZiwgdywgaCwgMCwgMCwgdywgaCk7CiAgfSBlbHNlIHsKICAgIGN0 eC5kcmF3SW1hZ2UoaW1nLCAwLCAwKTsKICB9CgogIHhvZmYgKz0gMTsKCiAgaWYgKHhvZmYgPj0g aW1nLndpZHRoKSB7CiAgICB4b2ZmID0gMDsKCiAgICB5b2ZmICs9IDE7CgogICAgaWYgKHlvZmYg PiBpbWcuaGVpZ2h0KSB7CiAgICAgIHlvZmYgPSAwOwogICAgfQogIH0KCiAgY3R4LmZpbGxUZXh0 KGZyYW1lcy50b1N0cmluZygpICsgIiBmcmFtZXMiLCA1LCAyMCk7CgogICsrZnJhbWVzOwoKICBy ZXF1ZXN0QW5pbWF0aW9uRnJhbWUoZik7Cn07CgppbWcub25sb2FkID0gZnVuY3Rpb24gKCkgewog IHJlcXVlc3RBbmltYXRpb25GcmFtZShmKTsKfTsKCmltZy5zcmMgPSAidGVzdC5wbmciOwo8L3Nj cmlwdD4KPC9ib2R5Pgo8L2h0bWw+CjwhLS0gdmltOiBzZXQgc3c9MiBzdHM9MiBldCA6IC0tPgo=