[Bug tdep/13766] New: [7.3/7.4 Regression] "info vec" and info "float" don't work with AVX

[Bug tdep/13766] New: [7.3/7.4 Regression] "info vec" and info "float" don't work with AVX

[hjl.tools at gmail dot com]

http://sourceware.org/bugzilla/show_bug.cgi?id=13766

             Bug #: 13766
           Summary: [7.3/7.4 Regression] "info vec" and info "float" don't
                    work with AVX
           Product: gdb
           Version: 7.4
            Status: NEW
          Severity: normal
          Priority: P2
         Component: tdep
        AssignedTo: unassigned@sourceware.org
        ReportedBy: hjl.tools@gmail.com
    Classification: Unclassified


On Fedora 15/x86-64 with AVX support, gdb 7.3/7.4 give

GNU gdb (GDB) Fedora (7.3.1-47.fc15)
Copyright (C) 2011 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-redhat-linux-gnu".
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>...
Reading symbols from /export/home/hjl/bugs/gdb/vdso/64...done.
Setting up the environment for debugging gdb.
Function "internal_error" not defined.
Make breakpoint pending on future shared library load? (y or [n]) [answered N;
input not from terminal]
Function "info_command" not defined.
Make breakpoint pending on future shared library load? (y or [n]) [answered N;
input not from terminal]
.gdbinit:8: Error in sourced command file:
Argument required (one or more breakpoint numbers).
(gdb) b main
Breakpoint 1 at 0x4005a7: file sleepalot.c, line 12.
(gdb) r
Starting program: /export/home/hjl/bugs/gdb/vdso/64 

Breakpoint 1, main (argc=1, argv=0x7fffffffe3d8) at sleepalot.c:12
12       printf("I'm process %d\n", getpid());
Missing separate debuginfos, use: debuginfo-install glibc-2.14.1-6.1.x86_64
(gdb) info float
  R7: Empty   Register 31 is not available
(gdb) info vec
mxcsr          0x1f80    [ IM DM ZM OM UM PM ]
ymm0           *value not available*
ymm1           *value not available*
ymm2           *value not available*
ymm3           *value not available*
ymm4           *value not available*
ymm5           *value not available*
ymm6           *value not available*
ymm7           *value not available*
ymm8           *value not available*
ymm9           *value not available*
ymm10          *value not available*
ymm11          *value not available*
ymm12          *value not available*
ymm13          *value not available*
ymm14          *value not available*
ymm15          *value not available*
(gdb)

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[Bug tdep/13766] [7.3/7.4 Regression] "info vec" and info "float" don't work with AVX

[palves at redhat dot com]

http://sourceware.org/bugzilla/show_bug.cgi?id=13766

Pedro Alves <palves at redhat dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |palves at redhat dot com

--- Comment #1 from Pedro Alves <palves at redhat dot com> 2012-02-27 17:31:15 UTC ---
The *value not available* bits, I'm not are a regressions.  The 
"R7: Empty   Register 31 is not available" bit, I hadn't seen before.

Please see <http://sourceware.org/ml/gdb-patches/2012-01/msg00916.html>.

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[Bug tdep/13766] [7.3/7.4 Regression] "info vec" and info "float" don't work with AVX

[palves at redhat dot com]

http://sourceware.org/bugzilla/show_bug.cgi?id=13766

--- Comment #2 from Pedro Alves <palves at redhat dot com> 2012-02-27 17:48:56 UTC ---
I've confirmed that that patch fixes both commands for me.

I've filed PR13767 for the "info float" (Register 31 is not available) issue,
because this PRs fix is about making the register values read as 0, instead of
being marked unavailable, but we still need to make "info float" handle the
register values being unavailable, for the cases of tracepoints, and partial
cores.

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[Bug tdep/13766] [7.3/7.4 Regression] "info vec" and info "float" don't work with AVX

[hjl.tools at gmail dot com]

http://sourceware.org/bugzilla/show_bug.cgi?id=13766

--- Comment #3 from H.J. Lu <hjl.tools at gmail dot com> 2012-02-27 18:05:20 UTC ---
(In reply to comment #1)
> The *value not available* bits, I'm not are a regressions.  The 
> "R7: Empty   Register 31 is not available" bit, I hadn't seen before.

They work with gdb 7.2.

> Please see <http://sourceware.org/ml/gdb-patches/2012-01/msg00916.html>.

It fixes this.

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[Bug tdep/13766] [7.3/7.4 Regression] "info vec" and info "float" don't work with AVX

[cvs-commit at gcc dot gnu.org]

http://sourceware.org/bugzilla/show_bug.cgi?id=13766

--- Comment #4 from cvs-commit at gcc dot gnu.org <cvs-commit at gcc dot gnu.org> 2012-03-05 14:24:10 UTC ---
CVSROOT:    /cvs/src
Module name:    src
Changes by:    palves@sourceware.org    2012-03-05 14:24:04

Modified files:
    gdb            : ChangeLog 

Log message:
    Mention PR gdb/13766

Patches:
http://sourceware.org/cgi-bin/cvsweb.cgi/src/gdb/ChangeLog.diff?cvsroot=src&r1=1.13955&r2=1.13956

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[Bug tdep/13766] [7.3/7.4 Regression] "info vec" and info "float" don't work with AVX

[palves at redhat dot com]

http://sourceware.org/bugzilla/show_bug.cgi?id=13766

Pedro Alves <palves at redhat dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |FIXED
   Target Milestone|---                         |7.5

--- Comment #5 from Pedro Alves <palves at redhat dot com> 2012-03-05 14:33:21 UTC ---
Fix checked in.

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[Bug tdep/13766] [7.3/7.4 Regression] "info vec" and info "float" don't work with AVX

[hjl.tools at gmail dot com]

http://sourceware.org/bugzilla/show_bug.cgi?id=13766

--- Comment #6 from H.J. Lu <hjl.tools at gmail dot com> 2012-03-05 17:18:47 UTC ---
This is a 7.3/7.4 regression. Can we backport the fix to 7.3/7.4 branches?

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[Bug tdep/13766] [7.3/7.4 Regression] "info vec" and info "float" don't work with AVX

[palves at redhat dot com]

http://sourceware.org/bugzilla/show_bug.cgi?id=13766

--- Comment #7 from Pedro Alves <palves at redhat dot com> 2012-03-05 17:23:15 UTC ---
Yes, fine with me.  I'm out for a couple hours.  If you want to do it yourself,
please go ahead.  I think the patch will apply cleanly.

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[Bug tdep/13766] [7.3/7.4 Regression] "info vec" and info "float" don't work with AVX

[cvs-commit at gcc dot gnu.org]

http://sourceware.org/bugzilla/show_bug.cgi?id=13766

--- Comment #8 from cvs-commit at gcc dot gnu.org <cvs-commit at gcc dot gnu.org> 2012-03-06 13:17:20 UTC ---
CVSROOT:    /cvs/src
Module name:    src
Branch:     gdb_7_4-branch
Changes by:    palves@sourceware.org    2012-03-06 13:17:13

Modified files:
    gdb            : ChangeLog i387-tdep.c 

Log message:
    2012-03-06  Pedro Alves  <palves@redhat.com>

    PR gdb/13766

    * i387-tdep.c (i387_supply_xsave): If we have an xsave buffer, and
    the register state is clear, supply explicit zero, instead of
    marking the register unavailable.

Patches:
http://sourceware.org/cgi-bin/cvsweb.cgi/src/gdb/ChangeLog.diff?cvsroot=src&only_with_tag=gdb_7_4-branch&r1=1.13614.2.47&r2=1.13614.2.48
http://sourceware.org/cgi-bin/cvsweb.cgi/src/gdb/i387-tdep.c.diff?cvsroot=src&only_with_tag=gdb_7_4-branch&r1=1.70.2.1&r2=1.70.2.2

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[Bug tdep/13766] [7.3/7.4 Regression] "info vec" and info "float" don't work with AVX

[cvs-commit at gcc dot gnu.org]

http://sourceware.org/bugzilla/show_bug.cgi?id=13766

--- Comment #9 from cvs-commit at gcc dot gnu.org <cvs-commit at gcc dot gnu.org> 2012-03-06 13:19:25 UTC ---
CVSROOT:    /cvs/src
Module name:    src
Branch:     gdb_7_3-branch
Changes by:    palves@sourceware.org    2012-03-06 13:19:13

Modified files:
    gdb            : ChangeLog i387-tdep.c 

Log message:
    2012-03-06  Pedro Alves  <palves@redhat.com>

    PR gdb/13766

    * i387-tdep.c (i387_supply_xsave): If we have an xsave buffer, and
    the register state is clear, supply explicit zero, instead of
    marking the register unavailable.

Patches:
http://sourceware.org/cgi-bin/cvsweb.cgi/src/gdb/ChangeLog.diff?cvsroot=src&only_with_tag=gdb_7_3-branch&r1=1.12887.2.73&r2=1.12887.2.74
http://sourceware.org/cgi-bin/cvsweb.cgi/src/gdb/i387-tdep.c.diff?cvsroot=src&only_with_tag=gdb_7_3-branch&r1=1.69&r2=1.69.2.1

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[Bug tdep/13766] [7.3/7.4 Regression] "info vec" and info "float" don't work with AVX

[palves at redhat dot com]

http://sourceware.org/bugzilla/show_bug.cgi?id=13766

--- Comment #10 from Pedro Alves <palves at redhat dot com> 2012-03-06 13:20:33 UTC ---
> This is a 7.3/7.4 regression. Can we backport the fix to 7.3/7.4 branches?

Done.

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