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patches/binutils/2.15/ld-2.15-stabs-tweak.patch
author "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>
Sun May 20 13:48:26 2007 +0000 (2007-05-20)
changeset 112 ea15433daba0
permissions -rw-r--r--
Ah! I finally have a progress bar that doesn't stall the build!
- pipe size in Linux is only 8*512=4096 bytes
- pipe size is not setable
- when the feeding process spits out data faster than the eating
process can read it, then the feeding process stalls after 4KiB
of data sent to the pipe
- for us, the progress bar would spawn a sub-shell every line,
and the sub-shell would in turn spawn a 'date' command.
Which was sloooww as hell, and would cause some kind of a
starvation: the pipe was full most of the time, and the
feeding process was stalled all this time.

Now, we use internal variables and a little hack based onan offset
to determine the elapsed time. Much faster this way, but still
CPU-intensive. 
     1 Signed-off-by: dank@kegel.com

     2 

     3 See http://sourceware.org/ml/binutils/2005-12/msg00270.html

     4 http://sourceware.org/ml/binutils-cvs/2005-12/msg00139.html

     5 

     6 STABS hash table size change, backported from the binutils CVS tree.  Here's

     7 the CVS log comment for the original change:

     8 

     9 revision 1.25

    10 date: 2005/12/29 10:29:23;  author: nickc;  state: Exp;  lines: +2 -3

    11 (_bfd_link_section_stabs): Use bfd_hash_table_init rather than

    12 bfd_hash_table_init_n(...,251) so that the size of the hash table can be

    13 controlled by the user.

    14 

    15 Note that tunable hash table size changes were added after 2.15.  The effect

    16 of this change is to make bfd use its default hash table size for the stabs

    17 hash as well.

    18 

    19 

    20 --- binutils-2.15/bfd/stabs.c.old	2004-05-17 15:36:04.000000000 -0400

    21 +++ binutils-2.15/bfd/stabs.c	2006-02-09 15:21:56.567014000 -0500

    22 @@ -241,9 +241,8 @@

    23  	goto error_return;

    24        /* Make sure the first byte is zero.  */

    25        (void) _bfd_stringtab_add (sinfo->strings, "", TRUE, TRUE);

    26 -      if (! bfd_hash_table_init_n (&sinfo->includes.root,

    27 -				   stab_link_includes_newfunc,

    28 -				   251))

    29 +      if (! bfd_hash_table_init (&sinfo->includes.root,

    30 +				   stab_link_includes_newfunc))

    31  	goto error_return;

    32        sinfo->stabstr = bfd_make_section_anyway (abfd, ".stabstr");

    33        sinfo->stabstr->flags |= SEC_HAS_CONTENTS | SEC_READONLY | SEC_DEBUGGING;
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