Hi,

While working on a review for the bitpos patch[1], I found an unsafe
alloca in cp-valprint, which could result in a crash since the
baseclass size could get very large. Here's a patch based on Jan's
suggestion to fix this.

I have tested to verify that this does not introduce any regressions in
the testsuite on x86_64.

Regards,
Siddhesh

[1] http://sourceware.org/ml/gdb-patches/2012-06/msg00851.html


gdb/ChangeLog:

2012-07-04  Siddhesh Poyarekar  <siddhesh@redhat.com>
	    Jan Kartochvil  <jan.kratochvil@redhat.com>

	* cp-valprint.c (cp_print_value): Replace potentially unsafe
	alloca with xmalloc/xfree.