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</o:shapelayout></xml><![endif]--></head><body lang=FR link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Arial","sans-serif";color:#1F497D'> Hi Ross,<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Arial","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Arial","sans-serif";color:#1F497D'>I did not say </span><span lang=EN-US>RTSPClientSession will deleted twice, I just report an access to an object after its deletion.</span><span lang=EN-US style='font-size:11.0pt;font-family:"Arial","sans-serif";color:#1F497D'><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Arial","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Arial","sans-serif";color:#1F497D'>The problem report by valgrind occurs processing TEARDOWN because :<o:p></o:p></span></p><p class=MsoListParagraph style='text-indent:-18.0pt;mso-list:l1 level1 lfo1'><![if !supportLists]><span lang=EN-US style='font-size:11.0pt;font-family:"Arial","sans-serif";color:#1F497D'><span style='mso-list:Ignore'>-<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]><span dir=LTR></span><span lang=EN-US style='font-size:11.0pt;font-family:"Arial","sans-serif";color:#1F497D'>RTSPServer:1016 clientSession->handleCmd_withinSession(this, cmdName, urlPreSuffix, urlSuffix, (char const*)fRequestBuffer); <o:p></o:p></span></p><p class=MsoNormal style='margin-left:18.0pt;text-indent:17.4pt'><span lang=EN-US style='font-size:11.0pt;font-family:"Arial","sans-serif";color:#1F497D'>=> delete the </span><span lang=EN-US style='font-size:10.0pt;font-family:"Courier New"'>RTSPClientSession the is pointed by </span><span lang=EN-US style='font-size:11.0pt;font-family:"Arial","sans-serif";color:#1F497D'>clientSession.<o:p></o:p></span></p><p class=MsoListParagraph style='text-indent:-18.0pt;mso-list:l1 level1 lfo1'><![if !supportLists]><span lang=EN-US style='font-size:11.0pt;font-family:"Arial","sans-serif";color:#1F497D'><span style='mso-list:Ignore'>-<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]><span dir=LTR></span><span lang=EN-US style='font-size:11.0pt;font-family:"Arial","sans-serif";color:#1F497D'>RTSPServer:1098 if (clientSession != NULL && clientSession->fStreamAfterSETUP && strcmp(cmdName, "SETUP") == 0) {<o:p></o:p></span></p><p class=MsoListParagraph style='margin-left:53.4pt;text-indent:-18.0pt;mso-list:l0 level1 lfo2'><![if !supportLists]><span lang=EN-US style='font-size:11.0pt;font-family:Wingdings;color:#1F497D'><span style='mso-list:Ignore'>ð<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]><span dir=LTR></span><span lang=EN-US style='font-size:11.0pt;font-family:"Arial","sans-serif";color:#1F497D'>The deleted clientSession is not NULL, point on a unallocated memory and clientSession->fStreamAfterSETUP is evaluated.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Arial","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Arial","sans-serif";color:#1F497D'>Running under debugger show that clientSession is no more allocated when clientSession->fStreamAfterSETUP is evaluated.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Arial","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Arial","sans-serif";color:#1F497D'>I guess that till the memory is mapped on something, it will work.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Arial","sans-serif";color:#1F497D'>But I am not sure that in certain situation the memory could become no more valid and perhaps raise a segment violation .<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Arial","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Arial","sans-serif";color:#1F497D'>Are you sure that accessing to an memory that was freed could not raise any problem ?<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Arial","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Arial","sans-serif";color:#1F497D'>Best Regards,<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Arial","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Arial","sans-serif";color:#1F497D'> Michel.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Arial","sans-serif";color:#1F497D'><o:p> </o:p></span></p><div><div><div><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>[@@ THALES GROUP INTERNAL @@]<o:p></o:p></span></p></div></div></div><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Arial","sans-serif";color:#1F497D'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal><b><span lang=EN-US style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>De :</span></b><span lang=EN-US style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> live-devel-bounces@ns.live555.com [mailto:live-devel-bounces@ns.live555.com] <b>De la part d</b></span><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>e</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> Ross Finlayson<br><b>Envoyé :</b> vendredi 17 janvier 2014 15:51<br><b>À :</b> LIVE555 Streaming Media - development & use<br><b>Objet :</b> Re: [Live-devel] problem processing RTSP TEARDOWN<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>"valgrind" frequently reports 'false positives' - i.e., 'errors' that aren't really errors. Therefore, I don't pay attention to "valgrind" reports, unless they're accompanied by a report of a real problem (such as a crash), or an identification of a specific bug in the code. In other words, a "valgrind" report, is not, per se, a "problem".<o:p></o:p></p><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>In this case, I don't see any problem in the code. The "RTSPClientSession" object is looked up - for each request - by looking up the 'session id string' in a hash table. The "RTSPClientSession" destructor (which is called when handling a "TEARDOWN") also removes the object from the hash table. So I don't see any way that a "RTSPClientSession" object can get deleted twice.<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>So, right now I don't see this "valgrind" report as indicating a real problem.<o:p></o:p></p></div><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal><span class=apple-style-span><span style='font-family:"Helvetica","sans-serif";color:black'>Ross Finlayson</span></span><span style='font-family:"Helvetica","sans-serif";color:black'><br><span class=apple-style-span>Live Networks, Inc.</span><br><span class=apple-style-span><a href="http://www.live555.com/">http://www.live555.com/</a></span></span> <o:p></o:p></p></div><p class=MsoNormal><o:p> </o:p></p></div></body></html>