Closed Bug 771780 Opened 9 years ago Closed 9 years ago
crash in ns
File Stream Base::Write
It's #32 top browser crasher in 15.0a2 and #196 in 16.0a1. If first appeared in 15.0a1/20120524030520. The regression range is: http://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=36e938e51481&tochange=f43e8d300f21 It stopped spiking after 16.0a1/20120609030536. The working range is: http://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=95d1bb200f4e&tochange=dc410944aabc There are two kinds of stack trace: Frame Module Signature Source 0 @0xd71007b 1 @0xd705178 2 xul.dll nsFileStreamBase::Write netwerk/base/src/nsFileStreams.cpp:226 3 xul.dll nsSafeFileOutputStream::Write netwerk/base/src/nsFileStreams.cpp:796 4 xul.dll nsBufferedOutputStream::Flush netwerk/base/src/nsBufferedStreams.cpp:606 5 xul.dll nsBufferedOutputStream::Write netwerk/base/src/nsBufferedStreams.cpp:589 6 xul.dll mozilla::Preferences::WritePrefFile modules/libpref/src/Preferences.cpp:735 7 xul.dll mozilla::Preferences::SavePrefFileInternal modules/libpref/src/Preferences.cpp:665 8 xul.dll mozilla::Preferences::SavePrefFile modules/libpref/src/Preferences.cpp:423 9 xul.dll NS_InvokeByIndex_P xpcom/reflect/xptcall/src/md/win32/xptcinvoke.cpp:70 10 xul.dll XPCWrappedNative::CallMethod js/xpconnect/src/XPCWrappedNative.cpp:2401 11 xul.dll XPC_WN_CallMethod js/xpconnect/src/XPCWrappedNativeJSOps.cpp:1500 12 mozjs.dll js::InvokeKernel js/src/jsinterp.cpp:310 13 mozjs.dll js::Interpret js/src/jsinterp.cpp:2512 14 mozjs.dll js::InvokeKernel js/src/jsinterp.cpp:326 ... Frame Module Signature Source 0 @0x16c26f 1 @0x15d30c 2 xul.dll nsFileStreamBase::Write netwerk/base/src/nsFileStreams.cpp:226 3 xul.dll nsSafeFileOutputStream::Write netwerk/base/src/nsFileStreams.cpp:796 4 xul.dll nsStreamCopierIB::ConsumeInputBuffer xpcom/io/nsStreamUtils.cpp:486 5 xul.dll nsPipeInputStream::ReadSegments xpcom/io/nsPipe3.cpp:766 ... More reports at: https://crash-stats.mozilla.com/report/list?signature=nsFileStreamBase%3A%3AWrite%28char+const*%2C+unsigned+int%2C+unsigned+int*%29
Hey Josh - could somebody from your team look through the suspected regression range and make recommendations on what we should consider investigating further (or speculativey back out)? There aren't a lot of comments in the crash itself, and I believe this crash is correlated to a Firefox change as opposed to an external variable. Thanks in advance.
Around the regressions range, Jan Varga had this change to 'nsFileStreams.cpp': a301e1c41b7d, 2012-05-23 06:23: Jan Varga - Bug 757507 - Implement read-write file streams. r=biesi This modifies the file containing the last resolved symbol in the stack. Then later on in the fixed range he has these fixes: Sat Jun 09 13:57:50 2012 6a2100ce978f: Jan Varga — Bug 763157 - FileHandle: Fix the assertion in FileHelper::~FileHelper. r=bent 72419c5d84df: Jan Varga — Bug 763013 - Race condition in async stream copier. r=biesi I don't have strong evidence for this, just something that looked suspicious. CC'd Jan and Michal.
Assignee: joshmoz → nobody
Hi Jan, can you look into this crash? Josh suspects this may be caused by bug 757507. If we're unsure, I'd like to speculatively back out bug 757507 from beta very early in the cycle.
Assignee: nobody → Jan.Varga
I re-reviewed my patch multiple times and I couldn't find anything that could cause this crash. I also tried to create a test which would trigger the crash, however I never experienced the crash. It seems this crash is not new (and thus unrelated to my nsFileStream changes), the crash happens in Firefox 14.0.1 too. See bug 574996 and bug 597260
Assignee: Jan.Varga → nobody
FYI, nsFileStreamBase::Write() now appears in the stack trace because I moved some code to the base class. PR_Write() used to be called from nsFileOutputStream::Write() directly, now it's called from nsFileStreamBase::Write() So, I think it's the same crash as in bug 597260
Status: ASSIGNED → RESOLVED
Closed: 9 years ago
Resolution: --- → DUPLICATE
Duplicate of bug: 597260
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