From FEDORA_PATCHES Mon Sep 17 00:00:00 2001

From: Fedora GDB patches <invalid@email.com>

Date: Fri, 27 Oct 2017 21:07:50 +0200

Subject: gdb-bz568248-oom-is-error.patch

;; Out of memory is just an error, not fatal (uninitialized VLS vars, BZ 568248).

;;=push+jan: Inferior objects should be read in parts, then this patch gets obsoleted.

http://sourceware.org/ml/gdb-patches/2010-06/msg00005.html

Hi,

unfortunately I see this problem reproducible only with the

archer-jankratochvil-vla branch (VLA = Variable Length Arrays - char[var]).

OTOH this branch I hopefully submit in some form for FSF GDB later.

In this case (a general problem but tested for example on Fedora 13 i686):

int

main (int argc, char **argv)

{

  char a[argc];

  return a[0];

}

(gdb) start

(gdb) print a

../../gdb/utils.c:1251: internal-error: virtual memory exhausted: can't allocate 4294951689 bytes.

It is apparently because boundary for the variable `a' is not initialized

there.  Users notice it due to Eclipse-CDT trying to automatically display all

the local variables on each step.

Apparentl no regressions on {x86_64,x86_64-m32,i686}-fedora13-linux-gnu.

But is anone aware of the reasons to use internal_error there?

I find simple error as a perfectly reasonable there.

(history only tracks it since the initial import)

IIRC this idea has been discussed with Tom Tromey, not sure of its origin.

I understand it may be offtopic for FSF GDB but from some GDB crashes I am not

sure if it can happen only due to the VLA variables.

Thanks,

Jan

gdb/

2010-06-01  Jan Kratochvil  <jan.kratochvil@redhat.com>

	    Tom Tromey  <tromey@redhat.com>

	* utils.c (nomem): Change internal_error to error.

diff --git a/gdb/utils.c b/gdb/utils.c

--- a/gdb/utils.c

+++ b/gdb/utils.c

@@ -746,13 +746,11 @@ malloc_failure (long size)

 {

   if (size > 0)

     {

-      internal_error (__FILE__, __LINE__,

-		      _("virtual memory exhausted: can't allocate %ld bytes."),

-		      size);

+      error (_("virtual memory exhausted: can't allocate %ld bytes."), size);

     }

   else

     {

-      internal_error (__FILE__, __LINE__, _("virtual memory exhausted."));

+      error (_("virtual memory exhausted."));

     }

 }