Hi DM,
I had Visual Studio running and had the debugger attached to the sbbsctrl process on my BBS machine so that it could hopefully point out where in the code it crashed, if it crashed. This morning I saw VS reported an exception had been thrown in mozjs185-1.0.dll. Since we don't have the debug symbols for that library, it wasn't able to show where in the code it happened.. It seemed Visual Studio was frozen, so I had to force-kill it, and Synchronet closed too. At least I know it's something with the Mozilla JS library. I'm not sure if there's a JS script I have that's doing something wrong (I've been wondering if it's one of my mods) or if there's a bug in the Mozilla JS library.
out where in the code it crashed, if it crashed. This morning I saw
VS reported an exception had been thrown in mozjs185-1.0.dll. Since
we don't have the debug symbols for that library, it wasn't able to
show where in the code it happened.. It seemed Visual Studio was
frozen, so I had to force-kill it, and Synchronet closed too. At least
I know it's something with the Mozilla JS library. I'm not sure if
there's a JS script I have that's doing something wrong (I've been
wondering if it's one of my mods) or if there's a bug in the Mozilla
JS library.
It shouldn't be possible for a JS script to do something so wrong as to crash SBBS. Or at least, that's the goal.
The call stack should have indicated where the JS library functions were called from within the SBBS code (and with what arguments) and that could help to determine what's at fault. Sometimes bugs in SBBS can cause a crash in the JS library, so just because its crashing in the JS library doesn't necessarily mean it is at fault. --
Re: Exception in Mozila JS DLL
By: Digital Man to Nightfox on Mon Aug 16 2021 10:25 am
out where in the code it crashed, if it crashed. This morning I saw
VS reported an exception had been thrown in mozjs185-1.0.dll. Since
we don't have the debug symbols for that library, it wasn't able to
show where in the code it happened.. It seemed Visual Studio was
frozen, so I had to force-kill it, and Synchronet closed too. At least
I know it's something with the Mozilla JS library. I'm not sure if
there's a JS script I have that's doing something wrong (I've been
wondering if it's one of my mods) or if there's a bug in the Mozilla
JS library.
It shouldn't be possible for a JS script to do something so wrong as to crash SBBS. Or at least, that's the goal.
The call stack should have indicated where the JS library functions were called from within the SBBS code (and with what arguments) and that could help to determine what's at fault. Sometimes bugs in SBBS can cause a crash in the JS library, so just because its crashing in the JS library doesn't necessarily mean it is at fault. --
I got a screenshot of Visual Studio which I probably should have shared earlier. The call stack didn't seem to show much useful information though:
https://i.imgur.com/Qb6Lewz.png
I got a screenshot of Visual Studio which I probably should have
shared earlier. The call stack didn't seem to show much useful
information though:
https://i.imgur.com/Qb6Lewz.png
Yeah, looks like maybe the callstack was corrupted. If you could build your own mozjs185-1.0.dll from source, you'd have the debug symbols and could maybe get more helpful details.
I know Deuce has been working on a major update to sbbs to use a modern JS library, so worst case, you could just wait till that lands in the master branch and this problem probably likely goes away (to be replaced by new ones). :-)
Re: Exception in Mozila JS DLL
By: Digital Man to Nightfox on Mon Aug 16 2021 05:12 pm
I got a screenshot of Visual Studio which I probably should have
shared earlier. The call stack didn't seem to show much useful
information though:
https://i.imgur.com/Qb6Lewz.png
Yeah, looks like maybe the callstack was corrupted. If you could build your own mozjs185-1.0.dll from source, you'd have the debug symbols and could maybe get more helpful details.
Have you ever built mozjs185-1.0.dll yourself?
The source doesn't include
Visual Studio project files, though it has a makefile. I tried searching online for the best way to build mozjs 1.8.5 on Windows, and found some fairly old pages mentioning things like using MozillaBuild, etc.,
and other
people wanting to build it with Visual Studio 2019 and having difficulties.
I tried following one page's instructions using MozillaBuild, though I still ran into issues with that. MozillaBuild has a *nix-like command prompt for Windows, and when running configure, it said it couldn't find a suitable CC executable on my system and aborted.
At this point I've thought about trying to just create a new DLL project in Visual Studio, including all the source, and trying to build it; I haven't tried that yet though.
I know Deuce has been working on a major update to sbbs to use a modern JS library, so worst case, you could just wait till that lands in the master branch and this problem probably likely goes away (to be replaced by new ones). :-)
At this point I might end up waiting for that. :)
| Sysop: | Keyop |
|---|---|
| Location: | Huddersfield, West Yorkshire, UK |
| Users: | 368 |
| Nodes: | 16 (2 / 14) |
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