[sane-devel] [dev] net backend and timing problems? (pretty weird)

[Jochen Eisinger]

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Hi!

Hum... if you have the time, could you send me the debug output from my
new net.c when crashing due the option changes, and the debug output
from my new sanei_wire with the old net backend (while probably crashing
after a preview)

regards
- -- jochen

mh wrote:
| Jochen Eisinger, Sam, 08 Sep 2001:
|
|>Hi!
|>
|>~From the debug output Michael send me, I assume that the bug isn't in
|>the net backend. The data pipe is closed correctly and the sigpipe
|>occurs on the control pipe. Why this doesn't happen with a delay of some
|>seconds isn't clear to me.
|>
|>Anyways, I'd like to use the new net backend version, because it has
|>much more debug output and fixes some minor bugs. I've tested it,
|>Michael tested it. Could some more people test it before it's committed
|>to cvs?
|>
|>I'm adding debug output to the sanei_wire interface at the moment and
|>already stumbled over a serious bug... in sanei_w_space memcpy is used
|>although the areas copied may overlap (which may result in data
corruption).
|>
|
| This should really be tested by others; I just discovered, that your
modified
| version of net.c introduces some new problems (at least for me). When
I try to
| change the scan mode (plustek backend) from e.g. "Color" to "Gray",
xsane and
| xscanimage segfault :-(
| The same happens, if I set the options "Grayify", "Three-Pass
Simulation" or
| "Hand-Scanner Simulation" with the pnm backend.
| For some unknown reason, quiteinsane doesn't crash.
|
| Michael
|
| Some reading for this long and rainy weekend follows (xscanimages
reaction after
| trying to change the scanmode :'-( ):
|
| Program received signal SIGSEGV, Segmentation fault.
| panel_destroy (dialog=0x80b2c30) at gtkglue.c:833
| 833     gtkglue.c: Datei oder Verzeichnis nicht gefunden.
| (gdb) bt
| #0  panel_destroy (dialog=0x80b2c30) at gtkglue.c:833
| #1  0x8058b43 in panel_rebuild (dialog=0x80b2c30) at gtkglue.c:1181
| #2  0x80565fa in set_option (dialog=0x80b2c30, opt_num=2, val=0x80b2690,
|     action=SANE_ACTION_SET_VALUE) at gtkglue.c:201
| #3  0x80573fb in option_menu_callback (widget=0x80b04cc, data=0x80b3228)
|     at gtkglue.c:568
| #4  0x400b3e93 in gtk_marshal_NONE__NONE () at gtkmarshal.c:124
| #5  0x400e4ce8 in gtk_handlers_run (handlers=0x80a29a0, signal=0xbfffefc8,
|     object=0x80b04cc, params=0xbffff01c, after=0) at gtksignal.c:1917
| #6  0x400e40bf in gtk_signal_real_emit (object=0x80b04cc, signal_id=75,
|     params=0xbffff01c) at gtksignal.c:1477
| #7  0x400e2017 in gtk_signal_emit () at gtksignal.c:234
| #8  0x4011aacf in gtk_widget_activate () at gtkwidget.c:2707
| #9  0x400bbe7c in gtk_menu_shell_activate_item () at gtkmenushell.c:771
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