Bug 19956

Summary: Strange relation between script loading and call stack size
Product: WebKit Reporter: Fabian Jakobs <fabian.jakobs>
Component: JavaScriptCoreAssignee: Nobody <webkit-unassigned>
Status: NEW    
Severity: Normal CC: ddkilzer, ggaren, info, zwarich
Priority: P2 Keywords: HasReduction, InRadar
Version: 525.x (Safari 3.1)   
Hardware: All   
OS: All   
Attachments:
Description Flags
Testcase
none
JavaScript file needed for the test none

Fabian Jakobs
Reported 2008-07-09 07:20:18 PDT
I have a very strange problem with Safari 3.1.2 and WebKit nightly. We use a loader script, which inserts script tags dynamically into the header. Now I observe the strange behavior that doing so seems to limit the available call stack size. We load many scripts (> 300) in a loop this way and run into an call stack size exceeded error. I have reduced the problem to the attached HTML, where you can see the effect. Still I have problems interpreting the results. Safari 3.1.2 shows me a decrease of the available call stack size, while it does not really work in the Nightly. What is happening inside of Safari there?
Attachments
Testcase (1.35 KB, text/html)
2008-07-09 07:21 PDT, Fabian Jakobs 		no flags
Details
JavaScript file needed for the test (7.88 KB, text/plain)
2008-07-09 07:21 PDT, Fabian Jakobs 		no flags
Details
View All Add attachment proposed patch, testcase, etc.
Fabian Jakobs
Comment 1 2008-07-09 07:21:01 PDT
Created attachment 22172 [details] Testcase
Fabian Jakobs
Comment 2 2008-07-09 07:21:53 PDT
Created attachment 22173 [details] JavaScript file needed for the test
Sebastian Werner
Comment 3 2008-07-09 10:03:21 PDT
Just tested your example. It starts with 498 here and ends with 308. Goes down with four in each iteration. MacBook 2Ghz, 2GB Mac OS X 10.5.4 Safari 3.1.2
Sebastian Werner
Comment 4 2008-07-09 10:11:49 PDT
Webkit rev 35067 dies with a stack overflow after the insertion of the second(!) script. Firefox 3 reports 2998 on every message. No decreasing detectable.
David Kilzer (:ddkilzer)
Comment 5 2008-07-10 06:25:04 PDT
<rdar://problem/6066033>
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