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Re: [Denemo-devel] Denemo crashes
From: |
Richard Shann |
Subject: |
Re: [Denemo-devel] Denemo crashes |
Date: |
Mon, 13 May 2013 16:23:08 +0100 |
On Mon, 2013-05-13 at 09:08 +0200, Éloi Rivard wrote:
> That makes sense. I didn't event understand why it compiled at all :)
It is very common for it not to matter, and not uncommon for it to fail
consistently, but I am surprised at seeing apparently random crashes -
on one run the label of one menu item was a string that belonged
somewhere else altogether. I still haven't seen any crashes since, but I
haven't done any serious music typesetting.
In this case, if you don't give the prototype for a function it assumes
the function returns an int. This only matters if it actually returns
something larger - I am guessing that a pointer on a 64-bit architecture
might have its top bits corrupted by the optimizer squeezing something
else into what it thinks are unused bits in a register.
>
> I can work on warning suppression, that would maybe make the code
> safer.
There are one or two cases which I didn't get to the bottom of - type
conflicts with built-in functions. And a bunch of warnings that arise
from code inside macros that I couldn't quickly fix.
And then, most worryingly there are complaints now about storing
pointers in integers which I haven't looked closely into, but I imagine
could be tricky to fix.
>
>
>
> There is a lot of warnings about gtk.
Are you referring to the default warning level or -Wall?
Richard
>
>
>
> 2013/5/12 Richard Shann <address@hidden>
> Eloi,
>
> I was getting a crash when doing File->New. The crash vanished
> when I
> turned the optimizer off. I re-compiled and noticed that
> keymapio.c had
> some warnings about prototypes so I put the headers in
> keymapio.h, now
> the crash has gone away. Before finding this consistent crash
> I was just
> getting occasional crashes on startup, never the same twice.
> Denemo used to be full of warnings on compile, but I have been
> reducing
> them whenever I work on a file if I can; I hope this is
> another case
> where it has paid off and that we don't have some threading
> bug lurking
> in the code.
> Below is the backtrace FWIW.
>
> Richard
>
> #2 0x00000000004b842b in add_ui (
> menupath=0xffffffffd802a010 <Address 0xffffffffd802a010
> out of
> bounds>,
> after=0x0, name=0x0) at ../../denemo/src/keyboard.c:195
> #3 0x00000000004b886c in create_command (is_script=<value
> optimized
> out>,
> name=0x7fffd802a0b0 "ScoreTitle", label=<value optimized
> out>,
> scheme=0x7fffd8033ae0 ";;;ScoreTitle\n(let ((tag
> \"ScoreTitle\")
> (title ScoreTitle::params))\n\t(define (blank-title)\n\t\t
> \t(if (not
> (d-DirectiveGet-header-postfix tag))\n\t\t\t\t(begin \n\t\t\t
> \t
> \t(d-DirectivePut-header-override tag 0) \n\t\t\t\t"...,
> tooltip=<value
> optimized out>, hidden=0, after=0x0,
> menupath=0x0,
> fallback=0xffffffffd802a010 <Address 0xffffffffd802a010
> out of
> bounds>,
> menupaths=0x0, merge=1) at ../../denemo/src/keyboard.c:279
> #4 0x00000000004d9a2f in parseScripts (filename=<value
> optimized out>,
> interactive=<value optimized out>)
> at ../../denemo/src/keymapio.c:56
> #5 parseCommands (filename=<value optimized out>,
> interactive=<value optimized out>)
> at ../../denemo/src/keymapio.c:213
> #6 parseKeymap (filename=<value optimized out>,
> interactive=<value optimized out>)
> at ../../denemo/src/keymapio.c:230
> #7 load_xml_keymap (filename=<value optimized out>,
> interactive=<value optimized out>)
> at ../../denemo/src/keymapio.c:294
> #8 0x000000000046cd86 in instantiate_script (action=0xfd5960)
> ---Type <return> to continue, or q <return> to quit---
> at ../../denemo/src/view.c:8003
> #9 0x000000000046d0e5 in activate_script (action=0xfd5960,
> param=<value optimized out>)
> at ../../denemo/src/view.c:8082
> #10 0x000000000046d248 in scheme_script_callback (
> script=<value optimized out>, params=0x7fffdd149d80)
> at ../../denemo/src/view.c:1080
>
>
>
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>
>
>
> --
> Éloi Rivard - address@hidden
>
> « On perd plus à être indécis qu'à se tromper. »
>