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<p><font size="2"><span style="font-size:10pt;"><span style="font-family: Calibri,Arial,Helvetica,sans-serif; font-size: 12pt;"></span><span style="font-size: 11pt;">Catching
</span><span style="font-size: 11pt;">SIGABRT</span></span></font><span style="font-size: 11pt;"> seems reasonable for a graceful crash, but I'm also already making use of LLVM's internal fatal_error_handler. However said handler is only called for very specific
things, the rest all use direct calls to assert, do I need to disable the LLVM_ENABLE_ASSERTIONS flag to change this?<br>
<br>
I also just noticed however that there's an exception handler flag too, which I didn't notice before as it's called "LLVM_ENABLE_EH". Will be rebuilding now with that enabled and will see if it works how I want it to, but I have to question the sensibility
of naming the flag like that when there's already flags with much longer names...?</span><br>
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<p>- Paul<br>
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<div id="x_divRplyFwdMsg" dir="ltr"><font style="font-size:11pt" color="#000000" face="Calibri, sans-serif"><b>From:</b> Sanjoy Das <sanjoy@playingwithpointers.com><br>
<b>Sent:</b> 16 August 2016 09:27<br>
<b>To:</b> Paul Hancock<br>
<b>Cc:</b> llvm-dev@lists.llvm.org<br>
<b>Subject:</b> Re: [llvm-dev] LLVM libraries and custom assertions.</font>
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<div class="PlainText">You can consider catching SIGABRT, or maybe LD_PRELOAD'ing an<br>
implementation for abort (not sure if the latter is possible, but<br>
should be easy to try out). I don't know how to do better than that<br>
without recompiling LLVM.<br>
<br>
Another option is to let LLVM's client register an "error handler"<br>
that gets called instead of abort() on a failed assert, but you'll<br>
have to change and rebuild LLVM to do this (and have a non-standard<br>
assert definition). This can be a little cleaner, depending on what<br>
you're trying to do. I don't have a good sense of what others think<br>
of this, but I'll be for upstreaming a mechanism of this sort to LLVM.<br>
<br>
-- Sanjoy<br>
<br>
On Mon, Aug 15, 2016 at 4:19 PM, Paul Hancock via llvm-dev<br>
<llvm-dev@lists.llvm.org> wrote:<br>
> Is there a simple method for compiling a custom assertion header/call into<br>
> all the LLVM libraries? I want my application to be able to handle any<br>
> thrown assertions (ie; as an exception) and recover or crash gracefully. I<br>
> already have a custom header in place in the application's source, however<br>
> this doesn't have an effect on [most of] the already compiled lib's.<br>
><br>
><br>
> _______________________________________________<br>
> LLVM Developers mailing list<br>
> llvm-dev@lists.llvm.org<br>
> <a id="LPlnk553037" href="http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev">
http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev</a>
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-- <br>
Sanjoy Das<br>
<a href="http://playingwithpointers.com">http://playingwithpointers.com</a><br>
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