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Using gdb to debug Segmentation fault on linux
- From: "ying lcs" <yinglcs at gmail dot com>
- To: gdb at sourceware dot org
- Date: Tue, 2 Oct 2007 18:46:22 -0500
- Subject: Using gdb to debug Segmentation fault on linux
Hi,
I am trying to use gdb to debug a segmentation fault on linux:
I get this backtrace dump, but I don't see what's wrong and why i get
a segmentation fault.
The address of 'this' looks correct. So I would need some help in how
to proceed in troubleshooting this problem:
Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread -1218548816 (LWP 25361)]
0x08067623 in RTPStream::SendRTCPSR (this=0x83a1520, inTime=@0x1b9a5b58,
inAppendBye=0) at RTCPUtilitiesLib/RTCPSRPacket.h:123
123 ((UInt32*)&fSenderReportBuffer)[(fSenderReportWithServerInfoSize
>> 2) + 1] = htonl(inSSRC);
(gdb)
(gdb) bt
#0 0x08067623 in RTPStream::SendRTCPSR (this=0x83a1520, inTime=@0x1b9a5b58,
inAppendBye=0) at RTCPUtilitiesLib/RTCPSRPacket.h:123
#1 0x08067d40 in RTPStream::Write (this=0x83a1520, inBuffer=0x839d688,
inLen=45, outLenWritten=0x0, inFlags=Variable "inFlags" is not available.
) at Server.tproj/RTPStream.cpp:1093
#2 0x0804c47f in QTSSCallbacks::QTSS_Write (inStream=0x83a1520,
inBuffer=0x839d688, inLen=45, outLenWritten=0x0, inFlags=5)
at Server.tproj/QTSSCallbacks.cpp:343
#3 0x080a28b6 in QTSSFileModuleDispatch (inRole=1936027236,
inParamBlock=0xb75e6360)
at APIModules/QTSSFileModule/QTSSFileModule.cpp:1569
#4 0x080608ed in RTPSession::Run (this=0x83945b0)
at Server.tproj/QTSSModule.h:92
#5 0x080eb1c3 in TaskThread::Entry (this=0x8361258) at Task.cpp:179
#6 0x080e82af in OSThread::_Entry (inThread=0x8361258) at OSThread.cpp:254
#7 0x00106341 in start_thread () from /lib/tls/libpthread.so.0
#8 0x00c966fe in clone () from /lib/tls/libc.so.6