OK, so I got it running and the crash is always in line 727:
Program received signal SIGSEGV, Segmentation fault. 0x00007fffe18f8418 in pix_mano::processGrayImage (this=<optimized out>, image=...) at pix_mano.cpp:727 727 if (base[chGray + xcoord] == 80) { // if we find a point (gdb) watchdog: signaling pd... watchdog: signaling pd...
Now, I know where that is, but I just don't understand how there can be a problem with this. Or what the problem is for that matter.
I mean, I am merely doing a test that the external does all the time. Furthermore, it doesn't crash in earlier linux versions...
Any suggestions?
J
On Sat, Oct 13, 2012 at 10:39 PM, Hans-Christoph Steiner hans@at.or.at wrote:
This should attach automatically:
$ gdb pd
Otherwise try looking up the PID number of the 'pd' process, and then doing 'attach PID#' at the gdb prompt.
Try loading Gem.pd_linux first, then pix_mano.pd_linux
.hc
On Oct 13, 2012, at 8:36 PM, Jaime Oliver wrote:
Hey Hans,
Thanks, but I am hitting a wall:
(gdb) add-symbol-file /home/joliver/Gem/extra/pix_mano/pix_mano.pd_linux The address where /home/joliver/Gem/extra/pix_mano/pix_mano.pd_linux has been loaded is missing
perhaps I should be adding Gem.pd_linux instead of my external?
J
On Sat, Oct 13, 2012 at 7:39 PM, Hans-Christoph Steiner hans@at.or.at wrote:
Try running Pd with gdb and you'll get a lot more information on the crash. Search puredata.info for "gdb" for howto.
the "backtrace" command in gdb is a good place to start, it'll show you in which function the crash is occuring.
.hc
On Oct 13, 2012, at 5:27 PM, Jaime Oliver wrote:
Hi all, IOhannes,
I am porting my systems from fedora 11 to ubuntu 12.04, but I am having some trouble with pix_mano. In Ubuntu 12.04 I get:
Segmentation fault (core dumped)
and Pd crashes
I have tested it in two different computers and get the same results. The exact same code and versions of Pd ( I have tried both pd-0.42-5 and pd-0.43-4) And I am using GEM: ver: 0.93.git 6d584fa
The only thing that is different between ubuntu and fedora is the camera driver, but this is stable for other applications, and as far as I can understand a segmentation fault refers to a problem in memory allocation?
IOhannes, I was trying to debug this and found that you had introduced some pimpl idiom stuff I don't know very well such as:
if(m_pimpl->p_enteringPoint->size < i) { delete m_pimpl->p_enteringPoint; m_pimpl->p_enteringPoint=NULL; } if(!m_pimpl->p_enteringPoint) m_pimpl->p_enteringPoint=new PIMPL::enteringPoint(i);Do you think these might have anything to do with these segmentation fault crashes?
best,
J
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