[PATCH] uClibc++: any throw statement causes memory corruption

[Bernhard Reutner-Fischer]

On March 12, 2016 12:18:02 AM GMT+01:00, Ivan Koldaev <pixus.ru at gmail.com> wrote:
>On Fri, Mar 11, 2016 at 1:41 PM, Rob Landley <rob at landley.net> wrote:
>> On 03/04/2016 01:48 PM, Ivan Koldaev wrote:
>>> Patch for uClibc++ bug #8741
>(https://bugs.busybox.net/show_bug.cgi?id=8741)
>>>
>>> I have discovered that uClibc++ incorrectly implements C++ exception
>>> ABI, allocating not enough memory in the
>>> "__cxxabiv1::__cxa_allocate_exception":
>>
>> When I spoke to Garrett Kajmowicz on the phone last month, he said
>that
>> his previous day job stuck with last GPLv2 release of gcc, so he
>stopped
>> staying up to date with changes in the C++ specification after ~2007.
>> Meaning he hasn't touched uClibc++ in years.
>>
>> He switched jobs recently (at Google now) but didn't seem
>particularly
>> interested in picking up where he left off after a multi-year gap. (I
>> think they use LLVM internally there, and thus
>http://libcxx.llvm.org/ ?
>> I know Android and ChromeOS do, dunno about the web server plumbing
>> stuff he's dealing with. It sounded more like AI research than
>anything
>> else, really...)
>>
>> I still use it in Aboriginal Linux, but only because I haven't
>switched
>> my toolchain to LLVM yet...
>>
>> Rob
>
>Rob,
>
>I appreciate your input.
>I understand that original author stepped away from the uClibc++
>development,
>but as I understand uClibc++ is not completely abandoned project,
>since there are still commits dated 6 days ago
>(https://git.uclibc.org/uClibc++/log/) by Bernhard Reutner-Fischer.
>Also OpenWRT uses uClibc++ as a primary C++ library with the latest
>GCC 5.2.x (luckily almost no program is using exceptions on embedded).
>So if you are saying that posting to this list is not a right way to
>have my patch accepted, could you please point me to the right one.
>Thank you for your time.
>
>P.S. added Bernhard Reutner-Fischer into CC, because I hope for some
>movement for this patch.

I have this scheduled, thanks. Will push together with a second patch as soon as I have written a trivial testcase for the second buglet.

Thanks for the patch!
Cheers,