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    Just saw the can shell commands actually do an explicit init of
    frame.callback, so that added zero init is superfluous now. I'll
    keep it because doing the init is good style to allow future
    extensions without hassle.<br>
    <br>
    The obd2ecu frame use was definitely broken.<br>
    <br>
    <br>
    <div class="moz-cite-prefix">Am 13.12.19 um 10:15 schrieb Michael
      Balzer:<br>
    </div>
    <blockquote type="cite"
      cite="mid:e593e023-bfe9-634e-4f81-171f0b5705f8@expeedo.de">
      <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
      Greg, Mark,<br>
      <br>
      the new crash happened here:<br>
      <br>
      <tt><a class="moz-txt-link-abbreviated"
href="mailto:balzer@leela:~/esp/Open-Vehicle-Monitoring-System-3/vehicle/OVMS.V3"
          moz-do-not-send="true">balzer@leela:~/esp/Open-Vehicle-Monitoring-System-3/vehicle/OVMS.V3</a>>
        a2l 0x3ffcfda0:0x3ffc87a0 0x400da762:0x3ffc87d0
        0x400da95b:0x3ffc87f0 0x400da901:0x3ffc8810</tt><tt><br>
      </tt><tt>Using elf file:
/home/balzer/esp/Open-Vehicle-Monitoring-System-3/vehicle/OVMS.V3/build/ovms3.elf</tt><tt><br>
      </tt><tt>0x400da762 is in can::ExecuteCallbacks(CAN_frame_t
        const*, bool, bool)
(/home/balzer/esp/Open-Vehicle-Monitoring-System-3/vehicle/OVMS.V3/components/can/src/can.cpp:866).</tt><tt><br>
      </tt><tt>861      {</tt><tt><br>
      </tt><tt>862      if (tx)</tt><tt><br>
      </tt><tt>863        {</tt><tt><br>
      </tt><tt>864        if (frame->callback)</tt><tt><br>
      </tt><tt>865          {</tt><tt><br>
      </tt><tt>866          (*(frame->callback))(frame, success); //
        invoke frame-specific callback function</tt><tt><br>
      </tt><tt>867          }</tt><tt><br>
      </tt><tt>868        for (auto entry : m_txcallbacks) {      //
        invoke generic tx callbacks</tt><tt><br>
      </tt><tt>869          entry->m_callback(frame, success);</tt><tt><br>
      </tt><tt>870          }</tt><tt><br>
      </tt><tt>0x400da95b is in canbus::TxCallback(CAN_frame_t*, bool)
(/home/balzer/esp/Open-Vehicle-Monitoring-System-3/vehicle/OVMS.V3/components/can/src/can.cpp:1018).</tt><tt><br>
      </tt><tt>1013        }</tt><tt><br>
      </tt><tt>1014      else</tt><tt><br>
      </tt><tt>1015        {</tt><tt><br>
      </tt><tt>1016        LogFrame(CAN_LogFrame_TX_Fail, p_frame);</tt><tt><br>
      </tt><tt>1017        }</tt><tt><br>
      </tt><tt>1018      MyCan.ExecuteCallbacks(p_frame, true, success);</tt><tt><br>
      </tt><tt>1019      }</tt><tt><br>
      </tt><tt>1020    </tt><tt><br>
      </tt><tt>1021    /**</tt><tt><br>
      </tt><tt>1022     * canbus::Write -- main TX API</tt><tt><br>
      </tt><tt>0x400da901 is in CAN_rxtask(void*)
(/home/balzer/esp/Open-Vehicle-Monitoring-System-3/vehicle/OVMS.V3/components/can/src/can.cpp:730).</tt><tt><br>
      </tt><tt>725                 
        me->IncomingFrame(&msg.body.frame);</tt><tt><br>
      </tt><tt>726                } while (loop);</tt><tt><br>
      </tt><tt>727              break;</tt><tt><br>
      </tt><tt>728              }</tt><tt><br>
      </tt><tt>729            case CAN_txcallback:</tt><tt><br>
      </tt><tt>730             
        msg.body.bus->TxCallback(&msg.body.frame, true);</tt><tt><br>
      </tt><tt>731              break;</tt><tt><br>
      </tt><tt>732            case CAN_txfailedcallback:</tt><tt><br>
      </tt><tt>733             
        msg.body.bus->TxCallback(&msg.body.frame, false);</tt><tt><br>
      </tt><tt>734             
        msg.body.bus->LogStatus(CAN_LogStatus_Error);</tt><br>
      <br>
      <br>
      As the frame callback invocation is secured against null, it must
      have been a missing initialization of frame.callback. So I checked
      our source tree for uses of CAN_frame_t without memset or zero
      initialization and found one in obd2ecu::IncomingFrame() --
      causing this crash I assume -- and two more in the can rx/tx shell
      commands.<br>
      <br>
      Fix is in commit <a
href="https://github.com/openvehicles/Open-Vehicle-Monitoring-System-3/commit/34302254567b15a8c0f9dfb730b5cf24703ac700"
        moz-do-not-send="true">https://github.com/openvehicles/Open-Vehicle-Monitoring-System-3/commit/34302254567b15a8c0f9dfb730b5cf24703ac700</a><br>
      <br>
      …and build in <a
        href="https://ovms.dexters-web.de/firmware/ota/v3.1/edge/"
        moz-do-not-send="true">https://ovms.dexters-web.de/firmware/ota/v3.1/edge/</a><br>
      <br>
      Greg, please test again.<br>
      <br>
      Regards,<br>
      Michael<br>
      <br>
      <br>
      <div class="moz-cite-prefix">Am 13.12.19 um 07:09 schrieb Greg D.:<br>
      </div>
      <blockquote type="cite"
        cite="mid:8bd53c02-1886-5579-ed32-1b69591811e2@gmail.com">
        <meta http-equiv="Content-Type" content="text/html;
          charset=UTF-8">
        Hi Michael,<br>
        <br>
        Ok, so I believe I loaded your Edge build, and the issue
        remains.  To verify, this is the string reported by the web
        Status page:<br>
        <br>
        3.2.007-102-g07440970/ota_1/main (build idf
        v3.3-beta3-774-g6652269e1 Dec 12 2019 11:59:14)<br>
        <br>
        Following my earlier email, I left the configuration as-is,
        including launching the obd2ecu task, but with the attached
        OBDII module removed, and the crash was resolved.  Rebooting the
        module had it come up running normally.  I then plugged in the
        OBDII module into the OVMSv3, and OVMS crashed the instant the
        first it started polling.  The device is a SyncUp Drive, which
        is a telematics and WiFi hotspot.  Connecting the OBDII device
        with 12v power off, as expected, did nothing.  Power it on, wait
        a few seconds to boot, and OVMS crashes immediately.<br>
        <br>
        New console log, attached.  It shows the module booting normally
        (OBDII device not present), followed by the device being
        attached (indicated in the log), and the subsequent crash.  I
        removed the device right after the boot started, so as to let
        the OVMS boot normally.<br>
        <br>
        So, clearly the obd2ecu task it is receiving frames on CAN3 just
        fine, but transmits back out on that same bus aren't working. 
        Is this something I need to address within obd2ecu, or is it in
        the core code?  I've not changed obd2ecu in quite some time.<br>
        <br>
        Greg<br>
        <br>
        <br>
        <div class="moz-cite-prefix">Michael Balzer wrote:<br>
        </div>
        <blockquote type="cite"
          cite="mid:ed1b2b37-eeb8-202f-cca6-81638d6e353a@expeedo.de">
          <meta http-equiv="Content-Type" content="text/html;
            charset=UTF-8">
          Fix commit is <a
href="https://github.com/openvehicles/Open-Vehicle-Monitoring-System-3/commit/8fef3f5fb6eec9fca26997e01d9c7d08080cdc06"
            moz-do-not-send="true">https://github.com/openvehicles/Open-Vehicle-Monitoring-System-3/commit/8fef3f5fb6eec9fca26997e01d9c7d08080cdc06</a><br>
          <br>
          Greg, please test.<br>
          <br>
          New build with SPIRAM fix: <a
            href="https://ovms.dexters-web.de/firmware/ota/v3.1/edge/"
            moz-do-not-send="true">https://ovms.dexters-web.de/firmware/ota/v3.1/edge/</a><br>
          <br>
          Regards,<br>
          Michael<br>
          <br>
          <br>
          <div class="moz-cite-prefix">Am 12.12.19 um 11:17 schrieb
            Michael Balzer:<br>
          </div>
          <blockquote type="cite"
            cite="mid:7b52c31f-1fe5-cc5a-ec52-56bd6df7553a@expeedo.de">
            <meta http-equiv="Content-Type" content="text/html;
              charset=UTF-8">
            Last line of a2l was missing:<br>
            <br>
            <tt>#!/bin/bash</tt><tt><br>
            </tt><tt>elf=~/esp/Open-Vehicle-Monitoring-System-3/vehicle/OVMS.V3/build/ovms3.elf</tt><tt><br>
            </tt><tt>for adr in $* ; do</tt><tt><br>
            </tt><tt>  if [[ "$adr" =~ "elf" ]] ; then</tt><tt><br>
            </tt><tt>    elf="$adr"</tt><tt><br>
            </tt><tt>  else</tt><tt><br>
            </tt><tt>    cmd+=" -ex 'l *${adr/:*/}'"</tt><tt><br>
            </tt><tt>  fi</tt><tt><br>
            </tt><tt>done</tt><tt><br>
            </tt><tt>cmd+=" -ex 'q'"</tt><tt><br>
            </tt><tt>echo "Using elf file: $elf"</tt><br>
            <tt>eval xtensa-esp32-elf-gdb -batch $elf $cmd
              2>/dev/null </tt><br>
            <br>
            <br>
            <br>
            <div class="moz-cite-prefix">Am 12.12.19 um 11:12 schrieb
              Michael Balzer:<br>
            </div>
            <blockquote type="cite"
              cite="mid:eed5cc60-9aa8-8b65-bb80-184125826c24@expeedo.de">
              <meta http-equiv="Content-Type" content="text/html;
                charset=UTF-8">
              Mark,<br>
              <br>
              1) maybe I missed posting my later version of a2l, which
              automatically strips the stack pointers from the ":"
              address syntax so you can copy&paste the USB output.
              Here it is:<br>
              <br>
              <tt>#!/bin/bash</tt><tt><br>
              </tt><tt>elf=~/esp/Open-Vehicle-Monitoring-System-3/vehicle/OVMS.V3/build/ovms3.elf</tt><tt><br>
              </tt><tt>for adr in $* ; do</tt><tt><br>
              </tt><tt>  if [[ "$adr" =~ "elf" ]] ; then</tt><tt><br>
              </tt><tt>    elf="$adr"</tt><tt><br>
              </tt><tt>  else</tt><tt><br>
              </tt><tt>    cmd+=" -ex 'l *${adr/:*/}'"</tt><tt><br>
              </tt><tt>  fi</tt><tt><br>
              </tt><tt>done</tt><tt><br>
              </tt><tt>cmd+=" -ex 'q'"</tt><tt><br>
              </tt><tt>echo "Using elf file: $elf"</tt><tt><br>
              </tt><br>
              <br>
              2) You're right, the bug is tx_frame with null origin
              overwriting body.bus in the union. I didn't notice that
              when checking Marko's submission.<br>
              <br>
              tx_frame is a copy of the last frame given to the bus for
              transmission. The queue msg is gone when the TX done IRQ
              comes in, and Marko needed a copy of the frame the TX IRQ
              relates to. I asked him (see PR discussion), he checked
              and confirmed that all TX is done sequentially, so a
              single buffer is sufficient.<br>
              <br>
              Swapping the lines would work. The frame.origin also
              shouldn't be null, but the handler should tolerate that.
              …oops, tx_frame also doesn't get initialized in the canbus
              constructor, so there's also potentially garbage in
              tx_frame if due to some bug a TX IRQ is generated or
              processed without a previous tx.<br>
              <br>
              I'll do the fixes… and also rename tx_frame to m_tx_frame
              for consistency.<br>
              <br>
              Regards,<br>
              Michael<br>
              <br>
              <br>
              <div class="moz-cite-prefix">Am 12.12.19 um 01:20 schrieb
                Mark Webb-Johnson:<br>
              </div>
              <blockquote type="cite"
                cite="mid:DDE51878-283B-45E6-8423-FF095EF621A6@webb-johnson.net">
                <meta http-equiv="Content-Type" content="text/html;
                  charset=UTF-8">
                <div class="">Two issues:</div>
                <div class=""><br class="">
                </div>
                <div class=""><u class=""><b class="">1] A2L</b></u></div>
                <div class=""><br class="">
                </div>
                My a2l is this:
                <div class=""><br class="">
                </div>
                <blockquote style="margin: 0 0 0 40px; border: none;
                  padding: 0px;" class="">
                  <div class="">
                    <div class=""><font class="" face="Andale Mono"><span
                          style="font-style: normal; font-size: 14px;"
                          class="">#!/bin/bash</span></font></div>
                    <div class=""><font class="" face="Andale Mono"><span
                          style="font-style: normal; font-size: 14px;"
                          class="">elf=3.2.007.ovms3.elf</span></font></div>
                    <div class=""><font class="" face="Andale Mono"><span
                          style="font-style: normal; font-size: 14px;"
                          class="">for adr in $* ; do</span></font></div>
                    <div class=""><font class="" face="Andale Mono"><span
                          style="font-style: normal; font-size: 14px;"
                          class="">  if [[ "$adr" =~ "elf" ]] ; then</span></font></div>
                    <div class=""><font class="" face="Andale Mono"><span
                          style="font-style: normal; font-size: 14px;"
                          class="">    elf="$adr"</span></font></div>
                    <div class=""><font class="" face="Andale Mono"><span
                          style="font-style: normal; font-size: 14px;"
                          class="">  else</span></font></div>
                    <div class=""><font class="" face="Andale Mono"><span
                          style="font-style: normal; font-size: 14px;"
                          class="">    cmd+=" -ex 'l *$adr'"</span></font></div>
                    <div class=""><font class="" face="Andale Mono"><span
                          style="font-style: normal; font-size: 14px;"
                          class="">  fi</span></font></div>
                    <div class=""><font class="" face="Andale Mono"><span
                          style="font-style: normal; font-size: 14px;"
                          class="">done</span></font></div>
                    <div class=""><font class="" face="Andale Mono"><span
                          style="font-style: normal; font-size: 14px;"
                          class="">cmd+=" -ex 'q'"</span></font></div>
                    <div class=""><font class="" face="Andale Mono"><span
                          style="font-style: normal; font-size: 14px;"
                          class="">echo "Using elf file: $elf"</span></font></div>
                    <div class=""><font class="" face="Andale Mono"><span
                          style="font-style: normal; font-size: 14px;"
                          class="">echo "xtensa-esp32-elf-gdb -batch
                          $elf $cmd"</span></font></div>
                    <div class=""><font class="" face="Andale Mono"><span
                          style="font-style: normal; font-size: 14px;"
                          class="">eval xtensa-esp32-elf-gdb -batch $elf
                          $cmd 2>/dev/null #| grep "^0x.* is in "</span></font></div>
                  </div>
                </blockquote>
                <div class="">
                  <div><br class="">
                  </div>
                  <div>When I run it, I get:</div>
                  <div><br class="">
                  </div>
                </div>
                <blockquote style="margin: 0 0 0 40px; border: none;
                  padding: 0px;" class="">
                  <div><font class="" face="Andale Mono"><span
                        style="font-style: normal; font-size: 14px;"
                        class="">$ a2l 3.2.007.ovms3.elf
                        0x400d5e4c:0x3ffc5c40 0x7ffffffd:0x3ffc5c90</span></font></div>
                  <div><font class="" face="Andale Mono"><span
                        style="font-style: normal; font-size: 14px;"
                        class="">Using elf file: 3.2.007.ovms3.elf</span></font></div>
                  <div><font class="" face="Andale Mono"><span
                        style="font-size: 14px;" class="">xtensa-esp32-elf-gdb
                        -batch 3.2.007.ovms3.elf  -ex 'l
                        *0x400d5e4c:0x3ffc5c40' -ex 'l
                        *0x7ffffffd:0x3ffc5c90' -ex ‘q'</span></font></div>
                </blockquote>
                <div class="">
                  <div><br class="">
                  </div>
                  <div>And a manual run gives:</div>
                  <div><br class="">
                  </div>
                </div>
                <blockquote style="margin: 0 0 0 40px; border: none;
                  padding: 0px;" class="">
                  <div>
                    <div><font class="" face="Andale Mono"><span
                          style="font-style: normal; font-size: 14px;"
                          class="">$ xtensa-esp32-elf-gdb -batch
                          3.2.007.ovms3.elf  -ex 'l
                          *0x400d5e4c:0x3ffc5c40' -ex 'l
                          *0x7ffffffd:0x3ffc5c90' -ex 'q'</span></font></div>
                    <div><font class="" face="Andale Mono"><span
                          style="font-style: normal; font-size: 14px;"
                          class="">Junk at end of line specification.</span></font></div>
                    <div><font class="" face="Andale Mono"><span
                          style="font-style: normal; font-size: 14px;"
                          class=""><br class="">
                        </span></font></div>
                    <div><font class="" face="Andale Mono"><span
                          style="font-style: normal; font-size: 14px;"
                          class="">$ </span><span style="font-size:
                          14px;" class="">xtensa-esp32-elf-gdb
                          3.2.007.ovms3.elf</span></font></div>
                    <div><font class="" face="Andale Mono"><span
                          style="font-size: 14px;" class="">GNU gdb
                          (crosstool-NG crosstool-ng-1.22.0-80-g6c4433a)
                          7.10</span></font></div>
                    <div><span style="font-size: 14px; font-family:
                        "Andale Mono";" class="">(gdb) l
                        *0x400d5e4c:0x3ffc5c40</span></div>
                    <div><font class="" face="Andale Mono"><span
                          style="font-size: 14px;" class="">
                          <div>Junk at end of line specification.</div>
                          <div>(gdb) l *0x7ffffffd:0x3ffc5c90</div>
                          <div>(gdb) quit</div>
                        </span></font></div>
                  </div>
                </blockquote>
                <div class="">
                  <div><br class="">
                  </div>
                  <div><u class=""><b class="">2] Frame origin</b></u></div>
                  <div><br class="">
                  </div>
                  <div>Regarding the CAN_txcallback, I think you are
                    correct. And both generators of that message set the
                    frame correctly. So my initial thought was that it
                    is either a memory corruption, or somewhere else
                    sending a frame with garbage data.</div>
                  <div><br class="">
                  </div>
                  <div>I do see this technique used in both the mcp2515
                    and esp32can drivers:</div>
                  <div><br class="">
                  </div>
                </div>
                <blockquote style="margin: 0 0 0 40px; border: none;
                  padding: 0px;" class="">
                  <div class="">
                    <div><font class="" face="Andale Mono"><span
                          style="font-style: normal; font-size: 14px;"
                          class="">msg.body.bus = me;</span></font></div>
                    <div><font class="" face="Andale Mono"><span
                          style="font-style: normal; font-size: 14px;"
                          class="">msg.body.frame = me->tx_frame;</span></font></div>
                  </div>
                </blockquote>
                <div class="">
                  <div><br class="">
                  </div>
                  <div>I don’t normally just copy structures over like
                    that. I memcpy() them, but I guess it must work.
                    However, as our CAN_queue_msg_t is a union of
                    CAN_frame_t (frame, with first member of the
                    structure a canbus*) and 'canbus* bus’, that is a
                    little worrying. It seems that the msg.body.bus will
                    get overwritten with whatever is in
                    msg.body.frame.origin. I can’t see anywhere that
                    tx_frame.origin is set - which is scary because that
                    would mean it is always random junk.</div>
                  <div><br class="">
                  </div>
                  <div>Maybe it works if tx_frame.origin is set to the
                    bus before anything else, but not in Greg’s
                    circumstances where something else arrives first.
                    Perhaps related to obd2ecu? I only see tx_frame set
                    in can.cpp canbus::Write. I don’t really understand
                    the tx_frame approach at all, and why the frame is
                    just not passed on the queue.</div>
                  <div><br class="">
                  </div>
                </div>
                <blockquote style="margin: 0 0 0 40px; border: none;
                  padding: 0px;" class="">
                  <div>
                    <div><font class="" face="Andale Mono"><span
                          style="font-style: normal; font-size: 14px;"
                          class="">// CAN Frame</span></font></div>
                    <div><font class="" face="Andale Mono"><span
                          style="font-style: normal; font-size: 14px;"
                          class="">// Note: Take care changing this
                          structure, as it is a union with</span></font></div>
                    <div><font class="" face="Andale Mono"><span
                          style="font-style: normal; font-size: 14px;"
                          class="">// CAN_log_message_t and position of
                          'origin' is fixed.</span></font></div>
                    <div><font class="" face="Andale Mono"><span
                          style="font-style: normal; font-size: 14px;"
                          class="">struct CAN_frame_t</span></font></div>
                    <div><font class="" face="Andale Mono"><span
                          style="font-style: normal; font-size: 14px;"
                          class="">  {</span></font></div>
                    <div><font class="" face="Andale Mono"><span
                          style="font-style: normal; font-size: 14px;"
                          class="">  canbus*     origin;                
                            // Origin of the frame</span></font></div>
                    <div><font class="" face="Andale Mono"><span
                          style="font-style: normal; font-size: 14px;"
                          class="">  CanFrameCallback * callback;      
                             // Frame-specific callback. Is called when
                          this frame is successfully sent (or sending
                          failed)</span></font></div>
                    <div><font class="" face="Andale Mono"><span
                          style="font-style: normal; font-size: 14px;"
                          class="">  CAN_FIR_t   FIR;                  
                             // Frame information record</span></font></div>
                    <div><font class="" face="Andale Mono"><span
                          style="font-style: normal; font-size: 14px;"
                          class="">  uint32_t    MsgID;                
                             // Message ID</span></font></div>
                    <div><font class="" face="Andale Mono"><span
                          style="font-style: normal; font-size: 14px;"
                          class="">  union</span></font></div>
                    <div><font class="" face="Andale Mono"><span
                          style="font-style: normal; font-size: 14px;"
                          class="">    {</span></font></div>
                    <div><font class="" face="Andale Mono"><span
                          style="font-style: normal; font-size: 14px;"
                          class="">    uint8_t   u8[8];                
                             // Payload byte access</span></font></div>
                    <div><font class="" face="Andale Mono"><span
                          style="font-style: normal; font-size: 14px;"
                          class="">    uint32_t  u32[2];                
                            // Payload u32 access (Att: little endian!)</span></font></div>
                    <div><font class="" face="Andale Mono"><span
                          style="font-style: normal; font-size: 14px;"
                          class="">    uint64_t  u64;                  
                             // Payload u64 access (Att: little endian!)</span></font></div>
                    <div><font class="" face="Andale Mono"><span
                          style="font-style: normal; font-size: 14px;"
                          class="">    } data;</span></font></div>
                    <div><font class="" face="Andale Mono"><span
                          style="font-style: normal; font-size: 14px;"
                          class=""><br class="">
                        </span></font></div>
                    <div><font class="" face="Andale Mono"><span
                          style="font-style: normal; font-size: 14px;"
                          class="">  esp_err_t Write(canbus* bus=NULL,
                          TickType_t maxqueuewait=0);  // bus:
                          NULL=origin</span></font></div>
                    <div><font class="" face="Andale Mono"><span
                          style="font-style: normal; font-size: 14px;"
                          class="">  };</span></font></div>
                    <div><font class="" face="Andale Mono"><span
                          style="font-style: normal; font-size: 14px;"
                          class=""><br class="">
                        </span></font></div>
                    <div>
                      <div><font class="" face="Andale Mono"><span
                            style="font-size: 14px;" class="">// CAN
                            message<br class="">
                            typedef struct<br class="">
                              {<br class="">
                              CAN_queue_type_t type;<br class="">
                              union<br class="">
                                {<br class="">
                                CAN_frame_t frame;  // CAN_frame<br
                              class="">
                                canbus* bus;<br class="">
                                } body;<br class="">
                              } CAN_queue_msg_t;</span></font></div>
                    </div>
                  </div>
                </blockquote>
                <div class="">
                  <div><br class="">
                  </div>
                  <div>This approach seems to date back to the swcan
                    support merge (f94ae5a1b).</div>
                  <div><br class="">
                  </div>
                  <div>Should we swap around, and set the msg.body.bus
                    after msg.body.frame? Or am I missing something…</div>
                  <div><br class="">
                  </div>
                  <div>Regards, Mark.</div>
                  <div><br class="">
                    <blockquote type="cite" class="">
                      <div class="">On 12 Dec 2019, at 2:29 AM, Michael
                        Balzer <<a href="mailto:dexter@expeedo.de"
                          class="" moz-do-not-send="true">dexter@expeedo.de</a>>
                        wrote:</div>
                      <br class="Apple-interchange-newline">
                      <div class="">
                        <meta http-equiv="Content-Type"
                          content="text/html; charset=UTF-8" class="">
                        <div class=""> Mark,<br class="">
                          <br class="">
                          good example why not to use addr2line: I think
                          that result is wrong. a2l uses gdb which
                          gives:<br class="">
                          <br class="">
                          <tt class=""><a
                              class="moz-txt-link-abbreviated"
href="mailto:balzer@leela:%7E/esp/Open-Vehicle-Monitoring-System-3/vehicle/OVMS.V3"
                              moz-do-not-send="true">balzer@leela:~/esp/Open-Vehicle-Monitoring-System-3/vehicle/OVMS.V3</a>>
                            a2l tmp/3.2.007.ovms3.elf
                            0x400d5e4c:0x3ffc5c40 0x7ffffffd:0x3ffc5c90<br
                              class="">
                            Using elf file: tmp/3.2.007.ovms3.elf<br
                              class="">
                            0x400d5e4c is in CAN_rxtask(void*)
(/home/openvehicles/build/Open-Vehicle-Monitoring-System-3.1/vehicle/OVMS.V3/components/can/src/can.cpp:730).<br
                              class="">
                            725                 
                            me->IncomingFrame(&msg.body.frame);<br
                              class="">
                            726                } while (loop);<br
                              class="">
                            727              break;<br class="">
                            728              }<br class="">
                            729            case CAN_txcallback:<br
                              class="">
                            730             
                            msg.body.bus->TxCallback(&msg.body.frame,
                            true);<br class="">
                            731              break;<br class="">
                            732            case CAN_txfailedcallback:<br
                              class="">
                            733             
                            msg.body.bus->TxCallback(&msg.body.frame,
                            false);<br class="">
                            734             
                            msg.body.bus->LogStatus(CAN_LogStatus_Error);<br
                              class="">
                          </tt><tt class=""><br class="">
                          </tt>…and that actually makes sense and
                          matches the register dump.<br class="">
                          <br class="">
                          If I read the gdb disassembly correctly, A10 =
                          msg.body.bus, so Greg's got a CAN_txcallback
                          msg without a bus.<br class="">
                          <br class="">
                          Hardening the rxtask against null here would
                          probably avoid the crash, but I don't see yet
                          how that could be possible.<br class="">
                          Both esp32can and mcp2515 set the bus field to
                          their object addresses, which cannot be null.<br
                            class="">
                          <br class="">
                          Regards,<br class="">
                          Michael<br class="">
                          <br class="">
                          <br class="">
                          <div class="moz-cite-prefix">Am 11.12.19 um
                            13:45 schrieb Mark Webb-Johnson:<br class="">
                          </div>
                          <blockquote type="cite"
                            cite="mid:1BF79214-A026-4AD0-97D4-5C845FBB0328@webb-johnson.net"
                            class="">
                            <meta http-equiv="Content-Type"
                              content="text/html; charset=UTF-8"
                              class="">
                            Can’t get a2l working at the moment. The
                            addr2line gives:
                            <div class=""><br class="">
                            </div>
                            <blockquote style="margin: 0 0 0 40px;
                              border: none; padding: 0px;" class="">
                              <div class="">
                                <div class="">addr2line -e
                                  3.2.007.ovms3.elf
                                  0x400d5e4c:0x3ffc5c40
                                  0x7ffffffd:0x3ffc5c90</div>
                                <div class="">/home/openvehicles/build/Open-Vehicle-Monitoring-System-3.1/vehicle/OVMS.V3/components/can/src/can.cpp:551</div>
                              </div>
                            </blockquote>
                            <div class="">
                              <div class="">
                                <div class=""><br class="">
                                </div>
                                <div class="">That is:</div>
                                <div class=""><br class="">
                                </div>
                              </div>
                            </div>
                            <blockquote style="margin: 0 0 0 40px;
                              border: none; padding: 0px;" class="">
                              <div class="">
                                <div class="">
                                  <div class="">
                                    <div class="">void
                                      canbus::LogInfo(CAN_log_type_t
                                      type, const char* text)</div>
                                    <div class="">  {</div>
                                    <div class="">  MyCan.LogInfo(this,
                                      type, text);    <—— HERE</div>
                                    <div class="">  }</div>
                                  </div>
                                </div>
                              </div>
                            </blockquote>
                            <div class="">
                              <div class="">
                                <div class=""><br class="">
                                </div>
                                <div class="">ELF is at:</div>
                                <div class=""><br class="">
                                </div>
                              </div>
                            </div>
                            <blockquote style="margin: 0 0 0 40px;
                              border: none; padding: 0px;" class="">
                              <div class="">
                                <div class="">
                                  <div class=""><a
href="http://api.openvehicles.com/firmware/ota/v3.2/main/3.2.007.ovms3.elf"
                                      class="" moz-do-not-send="true">http://api.openvehicles.com/firmware/ota/v3.2/main/3.2.007.ovms3.elf</a></div>
                                </div>
                              </div>
                            </blockquote>
                            <div class="">
                              <div class="">
                                <div class=""><br class="">
                                </div>
                                <div class="">Regards, Mark.</div>
                                <div class=""><br class="">
                                  <blockquote type="cite" class="">
                                    <div class="">On 11 Dec 2019, at
                                      5:20 PM, Michael Balzer <<a
                                        href="mailto:dexter@expeedo.de"
                                        class="" moz-do-not-send="true">dexter@expeedo.de</a>>
                                      wrote:</div>
                                    <br
                                      class="Apple-interchange-newline">
                                    <div class="">
                                      <meta http-equiv="Content-Type"
                                        content="text/html;
                                        charset=UTF-8" class="">
                                      <div class="">
                                        <div class="moz-cite-prefix">Mark,<br
                                            class="">
                                          <br class="">
                                          Greg uses your build, the
                                          crash point seems to be
                                          consistent, can you post the
                                          a2l on this?<br class="">
                                          <br class="">
                                          Regards,<br class="">
                                          Michael<br class="">
                                          <br class="">
                                          PS: Greg, would you mind
                                          switching to EAP to beta test
                                          future releases?<br class="">
                                          <br class="">
                                          <br class="">
                                          Am 11.12.19 um 04:33 schrieb
                                          Greg D.:<br class="">
                                        </div>
                                        <blockquote type="cite"
                                          cite="mid:48cd3f20-409f-d201-640a-31b6e7788e92@gmail.com"
                                          class="">
                                          <pre class="moz-quote-pre" wrap="">Hi folks,

Well, the module updated to 3.2.007 last night.  I just checked on it,
and it appears that it didn't exactly survive.  Crashed while running
the autoconfig script.  Log with two cycles attached.

I tried renaming the /store/events directory to /store/was_events since
it seems like Duktape was getting in the way, but that didn't resolve
the crash.  I manually enabled wifi so I could manage the module, and
moved it back to 3.2.005 from the other partition.  Seems stable again.

The car is going into the Service Center tomorrow (the perennial issue
with 1146 alerts), so I need to have the module stable so that I can
keep an eye on it.  Going to leave it on 3.2.005 for now, unless someone
has a quick fix in the next few hours...

Otherwise, any ideas for troubleshooting after I get the car back back
(hopefully end of day)?

Greg

</pre>
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                                        <br class="">
                                        <pre class="moz-signature" cols="144">-- 
Michael Balzer * Helkenberger Weg 9 * D-58256 Ennepetal
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Michael Balzer * Helkenberger Weg 9 * D-58256 Ennepetal
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        <pre class="moz-quote-pre" wrap="">_______________________________________________
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      <pre class="moz-signature" cols="160">-- 
Michael Balzer * Helkenberger Weg 9 * D-58256 Ennepetal
Fon 02333 / 833 5735 * Handy 0176 / 206 989 26
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      <pre class="moz-quote-pre" wrap="">_______________________________________________
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    <pre class="moz-signature" cols="160">-- 
Michael Balzer * Helkenberger Weg 9 * D-58256 Ennepetal
Fon 02333 / 833 5735 * Handy 0176 / 206 989 26
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