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From: "Owens, Steve" <Steve.Owens@disney.com>
To: "users@trafficserver.apache.org" <users@trafficserver.apache.org>
Date: Thu, 20 Jun 2013 10:30:48 -0700
Subject: Traffic server segfaults under valgrind but not on it's own.
Thread-Topic: Traffic server segfaults under valgrind but not on it's own.
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I was running some valgrind tests on trafficserver to test my plugin for me=
mory leaks.

At any rate code that runs perfectly fine with just traffic server running =
ends up segfaulting when trafficserver is running behind valgrind.

Here is the tail output of the valgrind log showing the segfault.

[Jun 20 10:28:01.181] Server {0x79d4940} DIAG: (ApiMgmtPlugin::JsonPTransfo=
rmationHandler::callbackHandler) Current state =3D STATE_EXIT: output_vio.n=
bytes =3D 33314; output_vio.ndone=3D 33314.
[Jun 20 10:28:01.183] Server {0x79d4940} DIAG: (ApiMgmtPlugin::JsonPTransfo=
rmationHandler::callbackHandler) Checking integrity of input_vio to see if =
it is OK to TSContCall(TSVIOContGet(input_vio), TS_EVENT_VCONN_WRITE_COMPLE=
TE, input_vio);
[Jun 20 10:28:01.188] Server {0x79d4940} DIAG: (ApiMgmtPlugin::JsonPTransfo=
rmationHandler::callbackHandler) TSAssert(input_vio) succeeds; calling TSCo=
ntCall(TSVIOContGet(input_vio), TS_EVENT_VCONN_WRITE_COMPLETE, input_vio)
NOTE: Traffic Server received Sig 11: Segmentation fault
/usr/local/bin/traffic_server - STACK TRACE:
/lib64/libpthread.so.0[0x337140ebe0]
/usr/local/bin/traffic_server(_ZN10HttpTunnel16consumer_handlerEiP18HttpTun=
nelConsumer+0xb0)[0x573340]
/usr/local/bin/traffic_server(_ZN10HttpTunnel12main_handlerEiPv+0x82)[0x573=
552]
/usr/local/lib/trafficserver/plugins/libJsonPTransformationHandlerPlugin.so=
(_ZN11apim_plugin26JsonPTransformationHandler15callbackHandlerEP10tsapi_con=
t7TSEventPv+0x295)[0x10e58389]
/usr/local/bin/traffic_server(_ZN17TransformTerminus12handle_eventEiPv+0xd2=
2)[0x4eabf2]
/usr/local/bin/traffic_server(_ZN7EThread13process_eventEP5Eventi+0x22f)[0x=
6b9b7f]
/usr/local/bin/traffic_server(_ZN7EThread7executeEv+0x1aa)[0x6ba07a]
/usr/local/bin/traffic_server[0x6b8fce]
/lib64/libpthread.so.0[0x337140677d]
/lib64/libc.so.6(clone+0x6d)[0x3370cd3c1d]
Killed

The segfault occurs on the call to TSContCall(TSVIOContGet(input_vio), TS_E=
VENT_VCONN_WRITE_COMPLETE, input_vio).
Yet immediately prior to this a call ws made to TSAssert(input_vio) and no =
assertion was thrown.


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<html><head></head><body style=3D"word-wrap: break-word; -webkit-nbsp-mode:=
 space; -webkit-line-break: after-white-space; color: rgb(0, 0, 0); font-si=
ze: 14px; font-family: Calibri, sans-serif; "><div>I was running some valgr=
ind tests on trafficserver to test my plugin for memory leaks.</div><div><b=
r></div><div>At any rate code that runs perfectly fine with just traffic se=
rver running ends up segfaulting when trafficserver is running behind valgr=
ind.</div><div><br></div><div>Here is the tail output of the valgrind log s=
howing the segfault.</div><div><br></div><div><div>[Jun 20 10:28:01.181] Se=
rver {0x79d4940} DIAG: (ApiMgmtPlugin::JsonPTransformationHandler::callback=
Handler) Current state =3D STATE_EXIT: output_vio.nbytes =3D 33314; output_=
vio.ndone=3D 33314.</div><div>[Jun 20 10:28:01.183] Server {0x79d4940} DIAG=
: (ApiMgmtPlugin::JsonPTransformationHandler::callbackHandler) Checking int=
egrity of input_vio to see if it is OK to TSContCall(TSVIOContGet(input_vio=
), TS_EVENT_VCONN_WRITE_COMPLETE, input_vio);</div><div>[Jun 20 10:28:01.18=
8] Server {0x79d4940} DIAG: (ApiMgmtPlugin::JsonPTransformationHandler::cal=
lbackHandler) TSAssert(input_vio) succeeds; calling TSContCall(TSVIOContGet=
(input_vio), TS_EVENT_VCONN_WRITE_COMPLETE, input_vio)</div><div>NOTE: Traf=
fic Server received Sig 11: Segmentation fault</div><div>/usr/local/bin/tra=
ffic_server - STACK TRACE:&nbsp;</div><div>/lib64/libpthread.so.0[0x337140e=
be0]</div><div>/usr/local/bin/traffic_server(_ZN10HttpTunnel16consumer_hand=
lerEiP18HttpTunnelConsumer+0xb0)[0x573340]</div><div>/usr/local/bin/traffic=
_server(_ZN10HttpTunnel12main_handlerEiPv+0x82)[0x573552]</div><div>/usr/lo=
cal/lib/trafficserver/plugins/libJsonPTransformationHandlerPlugin.so(_ZN11a=
pim_plugin26JsonPTransformationHandler15callbackHandlerEP10tsapi_cont7TSEve=
ntPv+0x295)[0x10e58389]</div><div>/usr/local/bin/traffic_server(_ZN17Transf=
ormTerminus12handle_eventEiPv+0xd22)[0x4eabf2]</div><div>/usr/local/bin/tra=
ffic_server(_ZN7EThread13process_eventEP5Eventi+0x22f)[0x6b9b7f]</div><div>=
/usr/local/bin/traffic_server(_ZN7EThread7executeEv+0x1aa)[0x6ba07a]</div><=
div>/usr/local/bin/traffic_server[0x6b8fce]</div><div>/lib64/libpthread.so.=
0[0x337140677d]</div><div>/lib64/libc.so.6(clone+0x6d)[0x3370cd3c1d]</div><=
div>Killed</div></div><div><br></div><div>The segfault occurs on the call t=
o&nbsp;TSContCall(TSVIOContGet(input_vio), TS_EVENT_VCONN_WRITE_COMPLETE, i=
nput_vio).</div><div>Yet immediately prior to this a call ws made to TSAsse=
rt(input_vio) and no assertion was thrown.</div><div><br></div><div><br></d=
iv></body></html>

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