[Bug corefiles/11523] New: gdb failed to read 32bit AVX coredump by gcore

[Bug corefiles/11523] New: gdb failed to read 32bit AVX coredump by gcore

[hjl dot tools at gmail dot com]

On Linux/AVX, I got

[hjl@gnu-18 xml]$ ./gdb 32 
GNU gdb (GDB) 7.1.50.20100419-cvs
Copyright (C) 2010 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-unknown-linux-gnu".
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>...
Reading symbols from /export/home/hjl/bugs/gdb/xml/32...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 0x80483e4: file x.c, line 12.
(gdb) r
Starting program: /export/home/hjl/bugs/gdb/xml/32 

Breakpoint 1, main () at x.c:12
12	  double y = foo (1.1);
(gdb) p $ymm0
$1 = {v8_float = {0, 0, 0, 0, 0, 0, 0, 0}, v4_double = {0, 0, 0, 0}, 
  v32_int8 = {0 <repeats 32 times>}, v16_int16 = {0 <repeats 16 times>}, 
  v8_int32 = {0, 0, 0, 0, 0, 0, 0, 0}, v4_int64 = {0, 0, 0, 0}, v2_int128 = {
    0x00000000000000000000000000000000, 0x00000000000000000000000000000000}}
(gdb) gcore
Saved corefile core.4776
(gdb) c
Continuing.
1.100000

Program exited normally.
(gdb) q
[hjl@gnu-18 xml]$ ./gdb 32 core.4776
GNU gdb (GDB) 7.1.50.20100419-cvs
Copyright (C) 2010 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-unknown-linux-gnu".
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>...
Reading symbols from /export/home/hjl/bugs/gdb/xml/32...done.
[New Thread 4776]

warning: Can't read pathname for load map: Input/output error.
Reading symbols from /lib/libc.so.6...(no debugging symbols found)...done.
Loaded symbols for /lib/libc.so.6
Reading symbols from /lib/ld-linux.so.2...(no debugging symbols found)...done.
Loaded symbols for /lib/ld-linux.so.2
Core was generated by `/export/home/hjl/bugs/gdb/xml/32'.
Program terminated with signal 5, Trace/breakpoint trap.
#0  0xa76d32e0 in ?? ()
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) p $ymm0
$1 = void
(gdb) p $xmm0
$2 = {v4_float = {0, 0, 0, 0}, v2_double = {0, 0}, v16_int8 = {
    0 <repeats 16 times>}, v8_int16 = {0, 0, 0, 0, 0, 0, 0, 0}, v4_int32 = {0, 
    0, 0, 0}, v2_int64 = {0, 0}, uint128 = 0}
(gdb)

-- 
           Summary: gdb failed to read 32bit AVX coredump by gcore
           Product: gdb
           Version: unknown
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: corefiles
        AssignedTo: unassigned at sourceware dot org
        ReportedBy: hjl dot tools at gmail dot com
                CC: gdb-prs at sourceware dot org


http://sourceware.org/bugzilla/show_bug.cgi?id=11523

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[Bug corefiles/11523] gdb failed to read 32bit AVX coredump by gcore

[hjl dot tools at gmail dot com]

------- Additional Comments From hjl dot tools at gmail dot com  2010-04-20 16:40 -------
Created an attachment (id=4738)
 --> (http://sourceware.org/bugzilla/attachment.cgi?id=4738&action=view)
A testcase

[hjl@gnu-6 core-2]$ readelf -n core.4776

Notes at offset 0x000001f4 with length 0x0000054c:
  Owner 	Data size	Description
  CORE		0x0000007c	NT_PRPSINFO (prpsinfo structure)
  CORE		0x00000090	NT_PRSTATUS (prstatus structure)
  LINUX 	0x00000340	NT_X86_XSTATE (x86 XSAVE extended state)
  CORE		0x000000b0	NT_AUXV (auxiliary vector)
[hjl@gnu-6 core-2]$ 

-- 


http://sourceware.org/bugzilla/show_bug.cgi?id=11523

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[Bug corefiles/11523] gdb failed to read 32bit AVX coredump by gcore

[hjl dot tools at gmail dot com]

------- Additional Comments From hjl dot tools at gmail dot com  2010-04-20 17:03 -------
Created an attachment (id=4739)
 --> (http://sourceware.org/bugzilla/attachment.cgi?id=4739&action=view)
A testcase

This one has a working 32bit coredump.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
Attachment #4738 is|0                           |1
           obsolete|                            |


http://sourceware.org/bugzilla/show_bug.cgi?id=11523

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[Bug corefiles/11523] gdb failed to read 32bit AVX coredump by gcore

[hjl dot tools at gmail dot com]

------- Additional Comments From hjl dot tools at gmail dot com  2010-04-20 18:44 -------
A patch is posted at

http://sourceware.org/ml/gdb-patches/2010-04/msg00625.html

-- 


http://sourceware.org/bugzilla/show_bug.cgi?id=11523

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[Bug corefiles/11523] gdb failed to read 32bit AVX coredump by gcore

[hjl dot tools at gmail dot com]

------- Additional Comments From cvs-commit at gcc dot gnu dot org  2010-04-21 20:23 -------
Subject: Bug 11523

CVSROOT:	/cvs/src
Module name:	src
Changes by:	hjl@sourceware.org	2010-04-21 20:22:20

Modified files:
	gdb            : ChangeLog amd64-linux-tdep.c i386-linux-tdep.c 

Log message:
	Properly read i386 coredump.
	
	2010-04-21  H.J. Lu  <hongjiu.lu@intel.com>
	
	PR corefiles/11523
	* amd64-linux-tdep.c (amd64_linux_core_read_description): Check
	XCR0 first.
	
	* i386-linux-tdep.c (i386_linux_core_read_xcr0): Return 0 if
	there is no .reg-xstate section.
	(i386_linux_core_read_description): Check XCR0 first.

Patches:
http://sourceware.org/cgi-bin/cvsweb.cgi/src/gdb/ChangeLog.diff?cvsroot=src&r1=1.11662&r2=1.11663
http://sourceware.org/cgi-bin/cvsweb.cgi/src/gdb/amd64-linux-tdep.c.diff?cvsroot=src&r1=1.35&r2=1.36
http://sourceware.org/cgi-bin/cvsweb.cgi/src/gdb/i386-linux-tdep.c.diff?cvsroot=src&r1=1.76&r2=1.77


------- Additional Comments From hjl dot tools at gmail dot com  2010-07-12 14:34 -------
Fixed.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|                            |FIXED


http://sourceware.org/bugzilla/show_bug.cgi?id=11523

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