Re: [PATCH] malloc: Simplify implementation of __malloc_assert

[Florian Weimer <fweimer@redhat.com>]

* Adhemerval Zanella Netto:

>> I think we converted almost all asserts that are reachable through heap
>> corruption into malloc_printerr a couple of years ago, so the diagnostic
>> value of the line number will be really low.  That's why I had to resort
>> to GDB to test this.
>> 
>> Do you insist that I add file and line number information?
>
> I think it should be ok, what bothers me is we need to reimplement the
> assert macro for malloc usage.

It occurred to me that we do not need to use stderr for internal assert
calls.  We can use a different implementation based on __libc_message.
Then the malloc code does not need its own version anymore.  We can also
change __libc_message to make it non-catchable (in process), and reset
SIGABRT to SIG_DFL earlier.  But maybe the last step goes too far.

Thanks,
Florian