Re: annotate.texi

[Stan Shebs <shebs@apple.com>]

Eli Zaretskii wrote:
> 
> Is there any reason why annotate.texi shouldn't be @include'd by
> gdb.texinfo and be part of the manual?  Right now, "set annotate" is
> not documented at all, and annotate.texi seems to be just what the
> doctor ordered...

This is on my long-term wish list for the manual, along with agentexpr
info.  My guiding principle is that the manual should document
everything that a user can do with GDB, so it should include information
about builtin protocols, such as annotation, remote debug, and MI.

Conversely, the internals manual is for anything that involves looking
at GDB's source code.

> And while at that, NEWS seems to be in the need of some work, it
> doesn't mention many of the new features that already are in the CVS
> tree.  I would like at least to mention the improvements in the DJGPP
> version.

Yes please.  To paraphrase the esteemed Dr Wirtiglieben, when speaking
of the Doomsday Device:

    VUT GOOD IS IT IF NOBODY KNOWS ABOUT IT!!??

:-)

But seriously, everybody doing a checkin should ask themselves: will
users want to know about this change?  Usually the answer will be
yes; users complain about lack of information far more often than
about overloaded...

Stan
From kettenis@wins.uva.nl Sat Apr 01 00:00:00 2000
From: Mark Kettenis <kettenis@wins.uva.nl>
To: ac131313@cygnus.com
Cc: agold@bga.com, gdb@sourceware.cygnus.com
Subject: Re: gdb does not `break' when using LD_PRELOAD
Date: Sat, 01 Apr 2000 00:00:00 -0000
Message-id: <200002171430.e1HEUt801735@delius.kettenis.local>
References: <388F30C2.B6795E21@bga.com> <38ABB665.CFA09B56@cygnus.com>
X-SW-Source: 2000-q1/msg00328.html
Content-length: 1006

   Date: Thu, 17 Feb 2000 19:50:45 +1100
   From: Andrew Cagney <ac131313@cygnus.com>

   "Arthur H. Gold" wrote:
   > 
   > gdb list:
   > 
   > Since upgrading to glibc-2.1.2, I've been having a problem with gdb--
   > specifically in regard to its use with LD_PRELOAD. The problem is that
   > when running with a preloaded library (either from the shell or set
   > within gdb) gdb fails to respect any breakpoints I set (though the
   > breakpoints themselves seem to be set successfully).
   > 
   > I understand there are problems with 4.18; I have, however, started
   > to run 4.17-14 (HJ Lu's patched version)--but to no avail.
   > 
   > Any input would be more than welcome

   Has anyone looked at this, or got any suggestions/comments?

AFAICT setting breakpoints in preloaded libraries seems to work fine
on i586-pc-linux-gnu with a glibc-2.1.3 snapshot.  Setting breakpoints
works and they are properly triggered.

Arthur, can you provide a small test-case, that shows your problems?

Mark
From jsm@cygnus.com Sat Apr 01 00:00:00 2000
From: Jason Molenda <jsm@cygnus.com>
To: Jimmy Guo <guo@cup.hp.com>
Cc: gdb@sourceware.cygnus.com, gdb-testers@sourceware.cygnus.com
Subject: Re: Problems with the new GDB repository source
Date: Sat, 01 Apr 2000 00:00:00 -0000
Message-id: <20000207195157.C28795@cygnus.com>
References: <20000206224315.A25084@cygnus.com> <Pine.LNX.4.10.10002071726160.12722-100000@hpcll168.cup.hp.com> <20000207194817.A28795@cygnus.com>
X-SW-Source: 2000-q1/msg00155.html
Content-length: 635

On Mon, Feb 07, 2000 at 07:48:17PM -0800, Jason Molenda wrote:

> At some point in the future (I have no idea when), someone will merge the
> sourceware binutils repo with the Cygnus binutils repo and the changes
> that had been happening within Cygnus will get out there.


Incidentally, I should add that few changes are actually done to libiberty
on the internal Cygnus repo any more.  My guess is that these changes
were in GCC (I think GCC is defined as the master set of sources for
libiberty?), were merged from the GCC repo into the Cygnus internal repo,
but haven't yet been merged in to the binutils sourceware repo.


Jason
From toddpw@windriver.com Sat Apr 01 00:00:00 2000
From: Todd Whitesel <toddpw@windriver.com>
To: gdb@sourceware.cygnus.com (GDB Developers)
Subject: symfile.c:symfile_bfd_open()
Date: Sat, 01 Apr 2000 00:00:00 -0000
Message-id: <200003241351.FAA06850@alabama.wrs.com>
X-SW-Source: 2000-q1/msg00795.html
Content-length: 819

While merging up to 4.18 (as a stepping stone to devo), I noticed
something that we're doing locally here which seems generally useful
for cross developing folks.

symfile.c:symfile_bfd_open() opens objects/executables using BFD.

It tells openp() to search the $PATH, which is obviously handy for
native, but seems to make no sense whatsoever for cross development.

Our local patch is to add a second argument to symfile_bfd_open,
"use_source_path", which ends up being set to 1 nearly all of the
time, since with our targets we are always cross developing. In
that case, we have openp() search source_path instead of getenv("PATH").

Does the multi-arch stuff provide a clean test for native vs. cross?
That'd be a better decision-maker than the "use_source_path" argument.

-- 
Todd Whitesel
toddpw @ windriver.com
From ac131313@cygnus.com Sat Apr 01 00:00:00 2000
From: Andrew Cagney <ac131313@cygnus.com>
To: Kevin Buettner <kevinb@cygnus.com>
Cc: gdb@sourceware.cygnus.com
Subject: Re: Patches for GNU/Linux PPC native now in CVS
Date: Sat, 01 Apr 2000 00:00:00 -0000
Message-id: <38B1FF0B.F9F0A939@cygnus.com>
References: <1000222025201.ZM9805@ocotillo.lan>
X-SW-Source: 2000-q1/msg00366.html
Content-length: 134

Kevin Buettner wrote:
> [....]
Kevin,

I'd suggest also putting a brief announcement on gdb-announce at
sourceware.

(Cool!).
	Andrew
From jimb@zwingli.cygnus.com Sat Apr 01 00:00:00 2000
From: Jim Blandy <jimb@zwingli.cygnus.com>
To: Eli Zaretskii <eliz@is.elta.co.il>
Cc: Jim Blandy <jimb@cygnus.com>, hjl@lucon.org, gdb@sourceware.cygnus.com, gdb-patches@sourceware.cygnus.com
Subject: Re: Problems with hardware watchpoint on ia32.
Date: Sat, 01 Apr 2000 00:00:00 -0000
Message-id: <npbt4040t3.fsf@zwingli.cygnus.com>
References: <20000307132401.A20282@valinux.com> <200003081008.FAA16481@indy.delorie.com> <20000308084304.A3150@lucon.org> <200003091210.HAA19857@indy.delorie.com> <npya7c6zn7.fsf@zwingli.cygnus.com> <200003221806.NAA14225@indy.delorie.com>
X-SW-Source: 2000-q1/msg00819.html
Content-length: 608

> I seem to be unable to reproduce the problem, at least in a C program:
> whenever I say "watch foo == bar" (where foo and bar are structs), GDB
> curses thusly:
> 
> 	Structure has no component named operator==.
> 
> Am I missing something?

As Michael points out, structure comparison is broken.  But that
doesn't change my original point --- that it's perfectly legitimate to
have `struct value' objects representing structures, which should be
watched in their entirety.

The type of a value is irrelevant --- we're trying to track the memory
references made in the course of evaluating the expression.
From kingdon@redhat.com Sat Apr 01 00:00:00 2000
From: Jim Kingdon <kingdon@redhat.com>
To: gdb@sourceware.cygnus.com
Subject: Re: gdbstubs library posted at sourceforge
Date: Sat, 01 Apr 2000 00:00:00 -0000
Message-id: <200001291645.LAA19052@devserv.devel.redhat.com>
References: <200001271910.OAA04242@devserv.devel.redhat.com>
X-SW-Source: 2000-q1/msg00073.html
Content-length: 1956

> * I don't want someone turning gdbstubs itself into a closed source
> product

Well, my own personal perspective is that the #1 thing which prevents
this is an active community which is developing the open product.  If
someone can avoid all the engineering costs of doing their own closed
fork, and get a much better result, they often will.  If the open
version has stagnated, then they are kind of stuck with doing their
own version.

So I think putting it on sourceforge is the key thing which will
encourage people to contribute to gdbstubs, not the license (in the
past, noone had a suitable process for accepting submissions to the
stubs).

> (particularly the tracepoint stuff, when it arrives)

Ah, I see, scars from the proprietary tracepoint stubs.  The story
here is that Red Hat is committed to open source and much of the code
which was closed source pre-merger will be opened.  However, I have no
idea how that applies to tracepoint stubs (there are a lot of
programs/products to sort through and look at both business and
technical sides, and I wouldn't be surprised if tracepoints are a pawn
in a larger game and/or lost in the shuffle :-)).

You could argue that Cygnus's past actions disprove this, but I'd
argue that there just isn't much economic value in proprietary stubs,
and thus little risk/likelihood that we'll see a lot of proprietary
stubs.  When Red Hat files their financials for the first quarter
combined with Cygnus (late March) you'll see actual numbers (at least,
I think so, I guess I don't know for sure exactly how they will break
it down).

> Maybe CEPL is a closer fit for what I'm after, because it accomplishes
> everything the LGPL does *and* eliminates the need for .o's?  I could
> go there.

I would think CEPL/Mozilla works better than LGPL, yes (the CEPL is
basically the same license as the Mozilla license for those who don't
know - see http://sourceware.cygnus.com/ecos/ and
http://www.mozilla.org/ ).
From tromey@cygnus.com Sat Apr 01 00:00:00 2000
From: Tom Tromey <tromey@cygnus.com>
To: gdb@sourceware.cygnus.com
Subject: Re: Patch: Remove 'Dave' error message.
Date: Sat, 01 Apr 2000 00:00:00 -0000
Message-id: <874sba1arg.fsf@cygnus.com>
References: <200002150059.QAA02943@elmo.cygnus.com> <20000214171818.A15790@cygnus.com>
X-SW-Source: 2000-q1/msg00300.html
Content-length: 359

Jason> I think his patch was quietly ignored because it reduces the
Jason> humor value of gdb.  gdb is a boring program and we need all
Jason> the humor I can get.

Jason> I agree that it is not very helpful for foreigners to have
Jason> things like this in there, sigh.

If gdb used GNU gettext we could replace it with a locale-specific joke.

Tom
From blizzard@redhat.com Sat Apr 01 00:00:00 2000
From: Chris Blizzard <blizzard@redhat.com>
To: gdb@sourceware.cygnus.com
Subject: Re: problems with gdb
Date: Sat, 01 Apr 2000 00:00:00 -0000
Message-id: <38AB2DC4.FA9A3C71@redhat.com>
References: <38A47E89.3F4674B3@mozilla.org> <npael3tqk6.fsf@zwingli.cygnus.com>
X-SW-Source: 2000-q1/msg00313.html
Content-length: 1986

So, one of the problems that I've been having is that some large .so libraries
take forever to load.  One of the libraries is about 28 meg with debugging
symbols in it.  I've let it run for about 10 mins and it's never finished
loading.  Here's what gprof says for loading a reasonable sized library ( 5
meg or so ):

Flat profile:

Each sample counts as 0.01 seconds.
  %   cumulative   self              self     total           
 time   seconds   seconds    calls  ms/call  ms/call  name    
 70.98     19.47    19.47    11954     1.63     2.25  lookup_minimal_symbol
 27.12     26.91     7.44 33240213     0.00     0.00  strcmp_iw
  0.33     27.00     0.09        3    30.00  9038.95  read_dbx_symtab
  0.15     27.04     0.04    44554     0.00     0.00  hash
  0.11     27.07     0.03   337915     0.00     0.00  bfd_getl32
  0.11     27.10     0.03    44554     0.00     0.00  bcache
  0.11     27.13     0.03      150     0.20     0.20  end_psymtab

Uhh...that's 33 _million_ calls.  That looks like this chunk of code:

 for (objfile = object_files;
       objfile != NULL && found_symbol == NULL;
       objfile = objfile->next)
    {
      if (objf == NULL || objf == objfile)
	{
	  for (msymbol = objfile->msymbols;
	       msymbol != NULL && SYMBOL_NAME (msymbol) != NULL &&
	       found_symbol == NULL;
	       msymbol++)
	    {
	      if (SYMBOL_MATCHES_NAME (msymbol, name))
		{
		  switch (MSYMBOL_TYPE (msymbol))
		    {
		    case mst_file_text:

I'm sorry, is that looking over a linked list?  SYMBOL_MATCHES_NAME() is a
macro that does some mangling magic so we can't use a standard hash lookup
table but there has to be something we can do to speed that up.

--Chris

-- 
------------
Christopher Blizzard
http://people.redhat.com/blizzard/
A few years back, I saw a young child stuck in a tree.  Nowadays,
when I find myself in a troubling situation, I look back and wonder
if that kid saw me take that chocolate bar from his backpack on
the ground.
------------
From ac131313@cygnus.com Sat Apr 01 00:00:00 2000
From: Andrew Cagney <ac131313@cygnus.com>
To: Mark Kettenis <kettenis@wins.uva.nl>
Cc: aj@suse.de, gdb@sourceware.cygnus.com
Subject: Re: core dump from GNU/Linux <sys/procfs.h>; Was: Build failure on Linux/i686
Date: Sat, 01 Apr 2000 00:00:00 -0000
Message-id: <38A7DA9C.F82221C9@cygnus.com>
References: <u8d7q4j4df.fsf@gromit.rhein-neckar.de> <200002101919.UAA23595@landau.wins.uva.nl> <38A353C3.DDD9A240@cygnus.com> <200002110736.e1B7afa00398@delius.kettenis.local>
X-SW-Source: 2000-q1/msg00261.html
Content-length: 1284

Mark Kettenis wrote:
> 
>    Date: Fri, 11 Feb 2000 11:11:47 +1100
>    From: Andrew Cagney <ac131313@cygnus.com>
> 
>    Mark Kettenis wrote:
> 
>    > This is the solution I proposed:
>    >
>    >    http://sourceware.cygnus.com/ml/gdb-patches/2000-q1/msg00103.html
>    >
>    > Note that you'll need to patch <sys/procfs.h> too, otherwise GDB will
>    > segfault when you try to debug a multithreaded app!
> 
>    Um, can you expand on this a little?  (You may have already).
> 
> The first version of glibc that includes the threads debugging library
> (libthread.so) will be 2.1.3, which has not been officially released
> yet.  Since both Andreas and I are glibc developers we were among the
> first to test a GDB that makes use of that functionality apart from
> the people who actually implemented it.  It looks as if Ulrich Drepper
> (the glibc maintainer) and Michael have let things go slighty out of
> sync.  So without patches to both GDB and the glibc prereleases it
> won't work.
> 
>    If there is a header file found in a standard GNU/Linux distribution
>    that can cause GDB to dump core we're going to need some sort of evasive
>    action.  Sigh.
> 
> That's what I'm trying to prevent :-)

Ok.  That sounds like the best that can be done.  Thanks!

	Andrew
From france@crl.dec.com Sat Apr 01 00:00:00 2000
From: George France <france@crl.dec.com>
To: "'Xavier Bestel'" <xbestel@aplio.fr>, gdb@sourceware.cygnus.com
Subject: RE: single-step
Date: Sat, 01 Apr 2000 00:00:00 -0000
Message-id: <D1674834F25BD3118B3208002BB90CD424AAC9@yen.crl.dec.com>
X-SW-Source: 2000-q1/msg00448.html
Content-type: multipart/mixed; boundary="----------=_1583534244-23286-7"

This is a multi-part message in MIME format...

------------=_1583534244-23286-7
Content-length: 1102

Hello Xavier;

Which ARM dev board do you have??  I have attached a patch for ptrace.c for
Linux 2.2.14 that will allow you to single step on the armv4l architecture.
The patch implements PTRACE_GETREGS, PTRACE_SETREGS, PTRACE_GETFPREGS &
PTRACE_SETREGS, with PTRACE_SET_BPT etc....

Best Regards,



--George

George France,      france@crl.dec.com
Cambridge Research Laboratory, Compaq Computer Corporation
One Kendall Square, Building 700     MS: CRL
Cambridge, MA 02139 USA



-----Original Message-----
From: Xavier Bestel [ mailto:xbestel@aplio.fr ]
Sent: Monday, February 28, 2000 9:44 AM
To: gdb@sourceware.cygnus.com
Subject: single-step


Hi !

I have and ARM dev board hooked to a Jeeni, controlled via ethernet. It
doesn't singl-step, it only stops at breakpoints. When I issue a "info
target", gdb replies that "Target can't single-step".
However I would greatly appreciate it to single step to debug my apps ...
So do you know how to fix it ? Is it a hardware non-feature or a simple
software misconfiguration ? Can gdb emulate singlestepping transparently
using breakpoints ?

    Xav



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------------=_1583534244-23286-7--
From eliz@delorie.com Sat Apr 01 00:00:00 2000
From: Eli Zaretskii <eliz@delorie.com>
To: ac131313@cygnus.com
Cc: kingdon@redhat.com, gdb@sourceware.cygnus.com
Subject: Re: Dependence on config.status
Date: Sat, 01 Apr 2000 00:00:00 -0000
Message-id: <200003050737.CAA10121@indy.delorie.com>
References: <200002280657.BAA27090@indy.delorie.com> <38BCCA84.74A4143E@cygnus.com> <bem9u49sh.fsf@rtl.cygnus.com> <200003021007.FAA04124@indy.delorie.com> <38C0ACF2.C00719B0@cygnus.com>
X-SW-Source: 2000-q1/msg00541.html
Content-length: 509

> Eli Zaretskii wrote:
> > 
> > > Well, if memory serves, if you re-ran configure in such a way that
> > > tm.h started linking to a different file, then the config.status
> > > dependency was the only way to force a rebuild.
> > 
> > How about adding some #define to config.h that would also change when
> > this happens?
> 
> Such as the names of the tm, xm and nm files?

Yes, that's what I had in mind.  Since the configure scripts already
knows the names of those files, it could put them into config.h.
From tromey@cygnus.com Sat Apr 01 00:00:00 2000
From: Tom Tromey <tromey@cygnus.com>
To: gdb@sourceware.cygnus.com
Subject: Re: INSTALL set incorrectly in gdb/doc/Makefile
Date: Sat, 01 Apr 2000 00:00:00 -0000
Message-id: <87og88rxaf.fsf@cygnus.com>
References: <200002270838.DAA25037@indy.delorie.com> <38BCDC1C.2917C1D6@cygnus.com> <200003211816.NAA12426@indy.delorie.com>
X-SW-Source: 2000-q1/msg00761.html
Content-length: 323

>>>>> "Eli" == Eli Zaretskii <eliz@delorie.com> writes:

Eli> How would people suggest to go about trying to solve this problem?  It
Eli> looks like some Autoconf problem.  Where would be a good place to ask
Eli> about this?

I didn't follow this thread, but autoconf questions should go to
autoconf@gnu.org.

Tom
From hjl@valinux.com Sat Apr 01 00:00:00 2000
From: "H . J . Lu" <hjl@valinux.com>
To: GDB <gdb@sourceware.cygnus.com>
Subject: Problems with hardware watchpoint on ia32.
Date: Sat, 01 Apr 2000 00:00:00 -0000
Message-id: <20000307132401.A20282@valinux.com>
X-SW-Source: 2000-q1/msg00564.html
Content-length: 4090

I don't like the hardware watchpoint support on ia32. That is one
reason I started hacking gdb. Here are some examples:

# cat y.c
int a1;
int a2;
int a3;
int a4;
int a5;
int a6;

main ()
{

  a1 = 11;
  a2 = 12;
  a3 = 13;
  a4 = 14;
  a5 = 15;
  a6 = 16;
  return 0;
}
# gcc -g -o y y.c
# /work/build/gnu/bin/gdb.orig/gdb/gdb y
(gdb) watch a1
Hardware watchpoint 1: a1
(gdb) watch a2
Hardware watchpoint 2: a2
(gdb) watch a3
Hardware watchpoint 3: a3
(gdb) watch a4 
Hardware watchpoint 4: a4
(gdb) watch a5
Hardware watchpoint 5: a5
(gdb) r
Starting program: /home/hjl/bugs/gdb/hw/y 
warning: Could not insert hardware watchpoint 5.
ptrace: Unknown error 4294967295.
Cannot insert breakpoints.
The same program may be running in another process.
(gdb) del 5
(gdb) r
The program being debugged has been started already.
Start it from the beginning? (y or n) y

Starting program: /home/hjl/bugs/gdb/hw/y 
warning: Could not insert hardware watchpoint 1.
warning: Could not insert hardware watchpoint 3.
ptrace: Unknown error 4294967295.
Cannot insert breakpoints.
The same program may be running in another process.
(gdb)

ia32 only has 4 hardware debug registers. But gdb shouldn't crash. Even
worse, after  deleted one hardware watchpoint, gdb still refused to
work.

One more annoying thing:

# cat ll.c
unsigned long long a1 = 0;
double a2 = 0;

main ()
{

  a1 = 0x00000000ffffffffL;
  a2 = 12;
  a1 = 0xffffffff00000000L;
  return 0;
}
# gcc -g -o ll ll.c
# /work/build/gnu/bin/gdb.orig/gdb/gdb ll
(gdb) watch a1
Watchpoint 1: a1
(gdb) watch a2
Watchpoint 2: a2
(gdb)

gdb won't set hardware watchpoints on long long nor double.

I put some kludegs in gdb 4.17. They work for me the way I prefer. F
r
the first one, I got

# /work/build/gnu/bin/gdb/gdb/gdb  y
(gdb) watch a1
Hardware watchpoint 1: a1
(gdb) watch a2
Hardware watchpoint 2: a2
(gdb) watch a3
Hardware watchpoint 3: a3
(gdb) watch a4
Hardware watchpoint 4: a4
(gdb) watch a5
Hardware watchpoint 5: a5
(gdb) r
Starting program: /home/hjl/bugs/gdb/hw/y 
warning: Could not insert hardware watchpoint 5.
warning: Could not insert hardware watchpoint 5.
Hardware watchpoint 1: a1
Hardware watchpoint 2: a2
Hardware watchpoint 3: a3
Hardware watchpoint 4: a4
Hardware watchpoint 5: a5
Hardware watchpoint 1: a1
Hardware watchpoint 2: a2
Hardware watchpoint 3: a3
Hardware watchpoint 4: a4
Hardware watchpoint 5: a5
warning: Could not insert hardware watchpoint 5.
warning: Could not insert hardware watchpoint 5.
Hardware watchpoint 1: a1
Hardware watchpoint 2: a2
Hardware watchpoint 3: a3
Hardware watchpoint 4: a4
Hardware watchpoint 5: a5
warning: Could not insert hardware watchpoint 5.
Hardware watchpoint 1: a1

Old value = 0
New value = 11
main () at y.c:12
12        a2 = 12;
(gdb) del 1
(gdb) del 1
(gdb) r
The program being debugged has been started already.
Start it from the beginning? (y or n) y

Starting program: /home/hjl/bugs/gdb/hw/y 
Hardware watchpoint 2: a2
Hardware watchpoint 3: a3
Hardware watchpoint 4: a4
Hardware watchpoint 5: a5
Hardware watchpoint 2: a2
Hardware watchpoint 3: a3
Hardware watchpoint 4: a4
Hardware watchpoint 5: a5
Hardware watchpoint 2: a2
Hardware watchpoint 3: a3
Hardware watchpoint 4: a4
Hardware watchpoint 5: a5
Hardware watchpoint 2: a2

Old value = 0
New value = 12
main () at y.c:13
13        a3 = 13;
(gdb)

For the second one,

# /work/build/gnu/bin/gdb/gdb/gdb  ll
(gdb) watch a1
Hardware watchpoint 1: a1
(gdb) watch a2
Hardware watchpoint 2: a2
(gdb) r
Starting program: /home/hjl/bugs/gdb/hw/ll 
Hardware watchpoint 1: a1
Hardware watchpoint 2: a2
Hardware watchpoint 1: a1
Hardware watchpoint 2: a2
Hardware watchpoint 1: a1
Hardware watchpoint 2: a2
Hardware watchpoint 1: a1

Old value = 0
New value = 4294967295
0x80483d3 in main () at ll.c:7
7         a1 = 0x00000000ffffffffL;
(gdb) c
Continuing.
Hardware watchpoint 2: a2

Old value = 0
New value = 12
main () at ll.c:9
9         a1 = 0xffffffff00000000L;

I know the support for long long and double is not perfect. But I
much prefer it than none at all.

I will send in a patch in another email.

H.J.
From ac131313@cygnus.com Sat Apr 01 00:00:00 2000
From: Andrew Cagney <ac131313@cygnus.com>
To: GDB Discussion <gdb@sourceware.cygnus.com>
Subject: [Fwd: Preparing for the GDB 5.0 / GDB 2000 / GDB2k release]
Date: Sat, 01 Apr 2000 00:00:00 -0000
Message-id: <389ECBAF.66013B07@cygnus.com>
X-SW-Source: 2000-q1/msg00120.html
Content-length: 2738

 


To : GDB Testers <gdb-testers at sourceware dot cygnus dot com>
Subject : Preparing for the GDB 5.0 / GDB 2000 / GDB2k release
From : Andrew Cagney <ac131313 at cygnus dot com>
Date : Tue, 08 Feb 2000 00:26:45 +1100
Newsgroups : cygnus.testers.gdb
Organization : Cygnus Solutions
Xref : cygnus.com cygnus.testers.gdb:212

[Please follow up to the general GDB mailing list]

Hello,

Given it is now almost a year since the last release of GDB (4.18) and
given also the number of significant internal changes made since that
release (event-loop, multi-arch, ui-out, ISO-C, obsolete code, ...), it
is now time to start anew the process of releasing a major version of
GDB - GDB 5.0.

As this release is being conducted entirely from the (new!) public CVS
repository I'm hoping that a more aggressive release schedule can be
achieved.  With that in mind, I've tentatively planned: two weeks of
patch resolution; the cutting of the 5.0 branch (2000-02-21?); one week
of last minute checks; and then the 5.0 release (29/2 2000-02-29?).
(Everyone is free to roll on the floor laughing at this point :-)

So, as Jason Molenda aptly wrote way back in '98:
> If you have patches that are ready to go in, but have not yet been
> submitted, please send them in now.  If you don't have your FSF copyright
> assignment paperwork submitted and on-file at the FSF, we probably won't
> have time to get significant contributions in for this release.
> 
> If you sent in a patch, but have not heard anything and the patch is not
> in the latest snapshot [snip],
> please send it in again.  We have a backlog of patches which have not
> yet been evaluated, so we'll be going over those for the next few days.
> I'd rather have two copies of a patch than zero copies, so don't be shy.

It would be good to see this GDB release running on *Linux, *BSD and
cygwin as well as plenty of the more traditional UNIX platforms.

For your reference, general GDB information can be found at:

  http://sourceware.cygnus.com/gdb/

while a pre- checked-out CVS source tree containing both GDB and DEJAGNU
can be found at:

 
ftp://sourceware.cygnus.com/pub/gdb/snapshots/gdb-dejagnu-pserver-2000-02-06.tar.bz2

Alternativly, the separate components:

 
ftp://sourceware.cygnus.com/pub/gdb/snapshots/dejagnu-pserver-2000-02-06.tar.bz2
 
ftp://sourceware.cygnus.com/pub/gdb/snapshots/gdb-pserver-2000-02-06.tar.bz2

are also available.  You will need to build (install) dejagnu before
running the GDB testsuite.

Finally, the GDB 5.1 release process is scheduled to start before July
'00 (if not much sooner!). If you have a major new port or contribution
then perhaphs 5.1 is the release you should be shooting for.

	enjoy,
		Andrew

--

Andrew Cagney (Red Hat)
GDB
From jtc@redback.com Sat Apr 01 00:00:00 2000
From: jtc@redback.com (J.T. Conklin)
To: Eli Zaretskii <eliz@is.elta.co.il>
Cc: gdb@sourceware.cygnus.com
Subject: Re: memory region attribute CLI
Date: Sat, 01 Apr 2000 00:00:00 -0000
Message-id: <5mhfe0kvpm.fsf@jtc.redbacknetworks.com>
References: <5mr9dd5dlt.fsf@jtc.redbacknetworks.com> <200003160944.EAA01842@indy.delorie.com> <5mem9avs45.fsf@jtc.redbacknetworks.com> <5m3dplwjri.fsf@jtc.redbacknetworks.com> <200003211819.NAA12438@indy.delorie.com>
X-SW-Source: 2000-q1/msg00762.html
Content-length: 600

>>>>> "Eli" == Eli Zaretskii <eliz@delorie.com> writes:
Eli> I think this is a very useful idea.  But as far as I understand, the
Eli> information managed by the code you posted needs to be consulted by
Eli> other GDB commands, right?  I don't see any code that does that yet.

Correct.  I just started on the code that actually looks up and acts
on memory region attributes yesterday.  I sent messages with the CLI
description and later the CLI code to get feedback on those parts, as
well as feedback on the general concept of region attributes.  

        --jtc

-- 
J.T. Conklin
RedBack Networks
From ac131313@cygnus.com Sat Apr 01 00:00:00 2000
From: Andrew Cagney <ac131313@cygnus.com>
To: Eli Zaretskii <eliz@delorie.com>
Cc: gdb@sourceware.cygnus.com, DJ Delorie <dj@delorie.com>
Subject: Re: 000217: status of DJGPP support
Date: Sat, 01 Apr 2000 00:00:00 -0000
Message-id: <38B092B7.73CDF9B6@cygnus.com>
References: <200002201017.FAA12081@indy.delorie.com>
X-SW-Source: 2000-q1/msg00357.html
Content-length: 2418

Eli Zaretskii wrote:
> 
> I fetched the 000217 snapshot yesterday and tried to build it with
> DJGPP.  I had only limited success: after some tweaking, everything
> compiled, but linker complains about undefined references to several
> functions.  In general, the DJGPP native support should be currently
> considered broken in several ways; I'm working on repairing it.
> 
> Here are some specific comments/questions:
> 
>   - There are lots of warnings about comparison of signed with
>     unsigned and unused arguments.  I find it hard to believe that
>     this is specific to DJGPP: doesn't anyone else see these warnings?
>     No doubt they are due to -Wall, but I understand we want to go
>     into production with these switches, right?

Not for 5.0.  The only warnings I consider significant for 5.0 are those
from:

,-Wimplicit\
,-Wreturn-type\
,-Wcomment\
,-Wtrigraphs\
,-Wformat\
,-Wparentheses\
,-Wpointer-arith\
,-Woverloaded-virtual\

even then, there are going to be platforms that can't be compiled if
these flags are specified.  Sorry.

>   - The configure scripts cannot be run without some tricks, like
>     setting a few variables in the environment.  So I'm thinking about
>     adding a gdb/djgpp subdirectory with a special script that DJGPP
>     users will need to run (and which in turn will run the top-level
>     configure), and maybe a few small Sed scripts to fix file-name
>     related problems on 8+3 filesystems.  Is this acceptable?

Well, there is currently:

	gdb/mpw-make.sed
and	gdb/config/mpw/*

I'd suggest:

	gdb/config/djgpp/*

Comments? Stan?

>   - What is the policy for fixing problems in the directories taken
>     from Binutils?  I'd imagine you want me to send patches to
>     Binutils maintainers, but with the next Binutils release nowhere
>     in sight, and some of my patches to Binutils in the queue since
>     August, is this really practical?  How can I make sure these
>     problems are fixed in GDB before GDB 5.0 is released?

GDB 5.0 shares the bfd, include, and a few other directories with
BINUTILS.  This means that once a patch is approved for BINUTILS, GDB
gets it immediatly - the problem of new release has been eliminated. 
Unfortunatly, this also means that if BINUTILS pushes back on a patch,
GDB can't accept it :-(

How to solve the situtation you're in? Off hand, I don't know - what
exactly is the status of those patches?

	Andrew
From ac131313@cygnus.com Sat Apr 01 00:00:00 2000
From: Andrew Cagney <ac131313@cygnus.com>
To: Quality Quorum <qqi@world.std.com>
Cc: gdb@sourceware.cygnus.com, Leon Pollak <leonp@plris.com>
Subject: Re: gdb remote protocol, winnt, wigglers
Date: Sat, 01 Apr 2000 00:00:00 -0000
Message-id: <3872E2E2.8E713C7F@cygnus.com>
References: <Pine.SGI.3.95.1000103001126.6751A-100000@world.std.com>
X-SW-Source: 2000-q1/msg00006.html
Content-length: 4779

[List pruned a little :-)]

Quality Quorum wrote:

> Hi,
> 
> I am working on implmenting standard compliant remote.c and gdbserver.
> I found just a few problems with protocol specs so far. 
> 
> 1. There is no need in 'isThreadAlive' request: remote.c has to maintain 
>    local cache of available threads, which is updated by 'threadListQuery'
>    if required (I tried a few variants implementing thread list 
>    synchronization and it seems this one is the most rational).
> 
>    Target methods xxx_is_thread_alive and xxxxx_find_new_thread 
>    are simply using this cache without generating any traffic
>    on the wire.
> 
>    So. 'itThreadAlive' is depreciated.
> 
> 2. I misread code implementing 'addBWPoint' and 'deleteBWPpoint', 
>    so the description was incorrec, it is fixed now.
> 
> I put updated document at http://www.std.com/qqi/ftp/protocol.txt .
> 
> I put updated rproxy at http://www.std.com/qqi/labslave/rproxy.html .
> 
> It is now running on WinNT and sipports Wiggler among other things - 
> I tried it with MPC860ADS.  It will be not too complicated to add 
> other processors, however, I do have 68360 based board only and no 
> other wigglers. I have ICD cable which I am using under linux,
> I am planning to provide a target under linux using ICD cable to 68360.
> 
> Please, be forgiving: WinNT stuff is barely in alpha state, rest is
> barely in beta. 
> 
> I have nagging outstanding problem: I do not know what paperwork and 
> what changes in the files I have to make in order to turn it over 
> to FSF. I signed and submitted the most appropriate paper I found on
> gnu website, however, I did not hear from them yet and it seems to me
> that it will not be enough.
> 
> Can any kind soul help me with this ?


Just FYI, there are several things that we're going to need to keep in
mind if this is to go forward.


As a general comment, its good to at least see someone with the energy
to pursue the gdbserver/stub code so that there is a generic (and
correct!) stub reference implementation available.  The fact that you're
hammering the external side is (as they say in the USofA) cool.

When it comes to things like the remote protocol spec and remote.c, you
might need to take a little care and think about what you want to do
with the work in the longer term.  To that end, I've some notes on both
remote.c and the spec below.

[[As an aside, I'm away for much of January, because of that and because
you appearing to be moving at a rapid rate of knots, I'm going to try to
be fairly to the point with the problems we're going to encounter.  That
way, I'm hopefully avoiding the possibility of you doing much
significant work that, unfortunately, ends up in limbo.]]

	Andrew

Spec:

The current ``official'' protocol spec is in the GDB user guide.  (As an
aside, it wasn't put in the internals manual as it was documenting an
external interface.)

Rather than end up with two possibly conflicting definitions, its
obviously going to be better if there was only one definition of the
protocol.  To that end, you many want to first think about how to
re-structure (before re-wording) the protocol spec.  Should it go into a
separate chapter or as an appendix / attatchment?  It's actually Stan
Shebs decision (as the doco maintainer).

With the higher level stuff out the way, it will become possible,
through a series of patches, to evolve the current spec into something
better.

FWIW, I'm strongly against simply replacing the existing spec with a new
one.  I'd like to be able to see (using CVS diff) what was changed at
each point so that any problems/issues can be traced down and then
fixed.


remote.c:

Beware, remote.c's underlying architecture is in a state of flux.

Of the possible targets to async first remote was selected as it wasn't
going to affect native targets and was entirely self contained (also it
didn't involve signals or ptrace). It turned out that it had some of the
more complex interactions but that is another story. :-)

The consequence is that remote.c currently contains two remote targets:
remote / extended-remote and async / extended-async.  Once all the async
issues are resolved, the old code will be given the flick.  If you've
been looking through remote.c you'll have noticed the FIXME's I've added
as place holders while other async code is finished.

If you're looking to re-do remote.c you'll need to keep in mind that
file is going to continue to receive major changes and those changes
will, unfortunately, take priority over anything else (sigh).  If you're
able to submit small and distinct patches then there is a really high
likelihood of your work being accepted quickly and that will allow the
work to keep reasonably in sync with the mainline code.

	Take care,

		Andrew
From Guenther.Grau@marconicomms.com Sat Apr 01 00:00:00 2000
From: Guenther Grau <Guenther.Grau@marconicomms.com>
To: gdb@sourceware.cygnus.com
Subject: Re: A patch for gnu-regex
Date: Sat, 01 Apr 2000 00:00:00 -0000
Message-id: <38C7C369.97CF2A7F@marconicomms.com>
References: <38C585BB.3F7B1AC7@apple.com> <20000307155806.A30106@valinux.com> <5mg0u2l3g0.fsf@jtc.redbacknetworks.com> <20000307162127.D485@lucon.org> <200003080044.e280iGB00429@delius.kettenis.local> <5m4saivyew.fsf@jtc.redbacknetworks.com> <38C7B8BD.26C0E220@cygnus.com>
X-SW-Source: 2000-q1/msg00651.html
Content-length: 714

Andrew Cagney wrote:
> 
[...]
> > http://sourceware.cygnus.com/ml/gdb-patches/2000-q1/msg00562.html
> > http://sourceware.cygnus.com/ml/gdb-patches/2000-q1/msg00566.html
> 
> This patch is definitly much better than the original.
> 
> Unfortunatly, I don't think that selecting a pre-installed regexp should
> be the default.  My rationale (As Mark? noted) is that ensuring that a
> GDB release provides consistent behavour between systems (1) is more
> important than having it select the latest/greatest random regexp.

I support this (not that it matters :-). If H.J. Lu wants it on
Linux, he can ./configure --with-libc-regex or --with-native-regex,
but the default should be the regex within gdb.

  Guenther
From shebs@apple.com Sat Apr 01 00:00:00 2000
From: Stan Shebs <shebs@apple.com>
To: Elena Zannoni <ezannoni@cygnus.com>
Cc: "Peter.Schauer" <Peter.Schauer@regent.e-technik.tu-muenchen.de>, Mark Kettenis <kettenis@wins.uva.nl>, gdb@sourceware.cygnus.com
Subject: Re: Testsuite regression
Date: Sat, 01 Apr 2000 00:00:00 -0000
Message-id: <38DFF635.A64D0CC8@apple.com>
References: <200003261706.e2QH6Yn08493@delius.kettenis.local> <200003261941.VAA32661@reisser.regent.e-technik.tu-muenchen.de> <14559.39965.642134.260490@kwikemart.cygnus.com>
X-SW-Source: 2000-q1/msg00822.html
Content-length: 301

Elena Zannoni wrote:
> 
> I tested your fix on solaris and linux, it seems to work fine. I have
> committed it. (Sorry, I know I shouldn't have done it w/o official
> approval from Stan).

No, that's cool.  To quote from the GCC pages, "We don't want to get overly
anal about checkin policies".

Stan
From kettenis@wins.uva.nl Sat Apr 01 00:00:00 2000
From: Mark Kettenis <kettenis@wins.uva.nl>
To: msnyder@cygnus.com
Cc: gdb@sourceware.cygnus.com
Subject: lin-thread cannot handle thread exit
Date: Sat, 01 Apr 2000 00:00:00 -0000
Message-id: <200003031635.e23GZwi00372@delius.kettenis.local>
X-SW-Source: 2000-q1/msg00525.html
Content-length: 1394

Hi Michael,

The thread_db assisted debugging code doesn't handle exiting threads
properly, at least in combination with glibc 2.1.3.  There are at
least two problems that prevent this from working:

1. In lin-thread.c:enable_thread_event_reporting(), GDB requests
   TD_DEATH events to be reported, and sets a breakpoint at the
   appropriate location.  The problem is that the LinuxThreads
   implementation included with glibc 2.1.3 triggers that breakpoint
   after it has flagged the thread as terminated.  As a conseuqence
   when GDB tries to fetch the registers for that thread it doesn't
   succeed, and GDB complains about a breakpoint at location 0x0 that
   it doesn't know of.

2. If I disable the reporting of TD_DEATH events, things still don't
   work.  The problem is that when the thread really exits, a
   TARGET_WAITKIND_EXITED event is reported to GDB in.  So the answer to
   the question ``Can I get this event mistakenly from a thread?'' in
   lin-thread.c:thread_db_wait() is ``Yes''.  Since the
   TARGET_WAITKIND_EXITED event is passed on to other code in GDB, GDB
   thinks that the entire process has died.

Ignoring those "spurious" TARGET_WAITKIND_EXITED events doesn't help
since some parts of GDB still think that the thread is still alive
then.

Looking through the code, it seems that there quite a few "loose
ends".  Is this still "work in progress"?

Mark