Created attachment 347822 [details] pstack of hanging firefox process Description of problem: Firefox has been hanging/freezing a few times in the last few days, which is unusual here. The most recent time I captured a backtrace with pstack (attached). I see the java plugin is mentioned in the backtrace, could that be relevant? I don't think that I visit a lot of java-related sites, perhaps I can narrow down which I used recently. I also dumped the core before I killed firefox, in case there's any useful information to be extracted from it. Version-Release number of selected component (if applicable): firefox-3.0.10-1.fc10.i386 java-1.6.0-openjdk-plugin-1.6.0.0-18.b16.fc10.i386 nspluginwrapper-1.3.0-2.fc10.i386
Created attachment 348336 [details] Script for coredump analysis just run the attached script with the core dump file, like gbt firefox core-file-name you will get a file firefox-backtrace-number.txt. Please attach it to this bug report. Thank you
I've since updated to firefox 3.0.11, so I can't trivially run your script on this system. I think I should be able to run it in mock, or with a liveusb+updates with a little work and the 3.0.10 rpms. But I can't see what information this script provides that /usr/bin/pstack doesn't.
Dont' bother ... if you won't be able to reproduce the hang, somebody else will. I will give you a month, and if you won't be able to provide more detailed backtrace, only then I will close this bug.
Can you tell me what is missing from the backtrace in attachment #347822 [details]? I prefer to reach for pstack than gdb+typing to get a backtrace from a running process, since it's possible to send the output to a file. So I'd like to know if and why pstack loses detail. Both pstack and attachment #348336 [details] are gdb scripts, pstack just suppresses most output before 'thread apply all bt', and that seems to be mainly symbol loading. Note: Attachment #341454 [details] contains a kded4 backtrace I made with gdb for another bug. I can't see any substantial difference between that backtrace and the one attached to this bug. But maybe I'm just lost in the noise?
(In reply to comment #2) > I've since updated to firefox 3.0.11, so I can't trivially run your script on > this system. I think I should be able to run it in mock, or with a > liveusb+updates with a little work and the 3.0.10 rpms. > > But I can't see what information this script provides that /usr/bin/pstack > doesn't. No, that's OK unless you are able to reproduce the issue with the current upgraded version of Firefox. If yes, then we would love to see new backatraces.
(In reply to comment #4) > Can you tell me what is missing from the backtrace in attachment #347822 [details]? I > Both pstack and attachment #348336 [details] are gdb scripts, pstack just suppresses most > output before 'thread apply all bt', and that seems to be mainly symbol > loading. Unfortunately not only. In you gdb backtrace you have also the line 0x00554416 in __kernel_vsyscall () saying where actually was the processor in the moment of stopping the firefox process.
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