Re: [PATCH] Include alloca.h for bfd

[Thiemo Seufer <ica2_ts@csv.ica.uni-stuttgart.de>]

Nick Clifton wrote:
> Hi Thiemo, Hi Ian,
> 
> > In the past I did not permit alloca to be used in BFD, because on
> > systems which do not have alloca the version in libiberty would call
> > xmalloc, which might cause the program to crash when it ran out of
> > memory.  I believe that BFD should never crash because it runs out of
> > memory; instead, it should return the appropriate error to the caller.
> > (That's why I wrote the objalloc interface when obstacks were changed
> > to no longer support a failure to allocate memory.)  However, I do not
> > know what the current thinking is on alloca in BFD.
> 
> I agree with your policy.  I was unaware of the problems involved with
> using alloca, which is why I did not enforce the rule as you used to
> do.  Now that I am aware of it I will try to enforce it in the future
> and also remove the current uses of alloca.
> 
> Thiemo - rather than including alloca.h how about changing the code in
> linker.c to use objalloc_alloc() instead ?

It's a simple string, so I used bfd_malloc.


Thiemo


2001-08-23  Thiemo Seufer <seufer@csv.ica.uni-stuttgart.de>

	/bfd/ChangeLog
	* linker.c (_bfd_generic_link_add_archive_symbols): Replace alloca()
	by bfd_malloc().


diff -BurpNX /bigdisk/src/binutils-exclude src-orig/bfd/linker.c src/bfd/linker.c
--- src-orig/bfd/linker.c	Sat Aug 18 21:47:22 2001
+++ src/bfd/linker.c	Thu Aug 23 17:14:45 2001
@@ -1007,9 +1007,10 @@ _bfd_generic_link_add_archive_symbols (a
 	     let's look for its import thunk */
 	  if (info->pei386_auto_import)
 	    {
-	      char *buf = alloca (strlen (h->root.string) + 10);
+	      char *buf = (char *) bfd_malloc (strlen (h->root.string) + 10);
 	      sprintf (buf, "__imp_%s", h->root.string);
 	      arh = archive_hash_lookup (&arsym_hash, buf, false, false);
+	      free(buf);
 	    }
 	  if (arh == (struct archive_hash_entry *) NULL)
 	    {