[Bug general/3697] New: gdb cannot read part of fcore core files (can read notes)

[Bug general/3697] New: gdb cannot read part of fcore core files (can read notes)

[pmuldoon at redhat dot com]

[pmuldoon@localhost frysk_bin]$ ~/frysk_bin/frysk-core/frysk/bindir/fcore 3109
&& gcore 3109 && cat /proc/3109/maps >& bash_maps

[pmuldoon@localhost frysk_bin]$ eu-readelf -a core.3109 > gcore_elf
[pmuldoon@localhost frysk_bin]$ eu-readelf -a fcore.3109 > fcore_elf

(will add these files as attachments, in further comments)

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           Summary: gdb cannot read part of fcore core files (can read
                    notes)
           Product: frysk
           Version: unspecified
            Status: NEW
          Severity: normal
          Priority: P2
         Component: general
        AssignedTo: frysk-bugzilla at sourceware dot org
        ReportedBy: pmuldoon at redhat dot com


http://sourceware.org/bugzilla/show_bug.cgi?id=3697

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[Bug general/3697] gdb cannot read part of fcore core files (can read notes)

[pmuldoon at redhat dot com]

------- Additional Comments From pmuldoon at redhat dot com  2006-12-11 18:43 -------
Created an attachment (id=1452)
 --> (http://sourceware.org/bugzilla/attachment.cgi?id=1452&action=view)
fcore elf section dump


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[Bug general/3697] gdb cannot read part of fcore core files (can read notes)

[pmuldoon at redhat dot com]

------- Additional Comments From pmuldoon at redhat dot com  2006-12-11 18:44 -------
Created an attachment (id=1453)
 --> (http://sourceware.org/bugzilla/attachment.cgi?id=1453&action=view)
gcore section dump


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[Bug general/3697] gdb cannot read part of fcore core files (can read notes)

[pmuldoon at redhat dot com]

------- Additional Comments From pmuldoon at redhat dot com  2006-12-11 18:45 -------
Created an attachment (id=1454)
 --> (http://sourceware.org/bugzilla/attachment.cgi?id=1454&action=view)
cat of /proc/maps


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[Bug general/3697] gdb cannot read part of fcore core files (can read notes)

[pmuldoon at redhat dot com]

------- Additional Comments From pmuldoon at redhat dot com  2006-12-11 18:46 -------
Output from loading in a gcore core file:

[pmuldoon@localhost frysk_bin]$ gdb
GNU gdb Red Hat Linux (6.5-13.fc6rh)
Copyright (C) 2006 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB.  Type "show warranty" for details.
This GDB was configured as "i386-redhat-linux-gnu".
(gdb) set debug target 1
(gdb) core-file core.3109 
core:target_xfer_partial (4, (null), 0x8a0c720,  0x0,  0x0, 512) = 144, bytes =
 20 00 00 00 00 14 ef 00 21 00 00 00 00 10 ef 00 ...
core:target_xfer_partial (2, (null), 0xbf8cead4,  0x0,  0xef1000, 52) = 52,
bytes = 7f 45 4c 46 01 01 01 00 00 00 00 00 ...
core:target_xfer_partial (2, (null), 0x8a0c868,  0x0,  0xef1034, 128) = 128,
bytes = 01 00 00 00 00 00 00 00 ...
core:target_xfer_partial (2, (null), 0x8a0c970,  0x0,  0xef1000, 2192) = 2192,
bytes =
 7f 45 4c 46 01 01 01 00 00 00 00 00 00 00 00 00 ...
(no debugging symbols found)
Using host libthread_db library "/lib/libthread_db.so.1".
Core was generated by `/bin/bash'.
target_fetch_registers (-1)
#0  0x00ef1402 in __kernel_vsyscall ()


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[Bug general/3697] gdb cannot read part of fcore core files (can read notes)

[pmuldoon at redhat dot com]

------- Additional Comments From pmuldoon at redhat dot com  2006-12-11 18:47 -------
Output from reading in a fcore file.

[pmuldoon@localhost frysk_bin]$ gdb
GNU gdb Red Hat Linux (6.5-13.fc6rh)
Copyright (C) 2006 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB.  Type "show warranty" for details.
This GDB was configured as "i386-redhat-linux-gnu".
(gdb) set debug target 1
(gdb) core-file fcore.3109 
core:target_xfer_partial (4, (null), 0x90aa6b8,  0x0,  0x0, 512) = 144, bytes =
20 00 00 00 00 14 ef 00 ...
core:target_xfer_partial (2, (null), 0xbfd4bf44,  0x0,  0xef1000, 52) = 52,
bytes = 7f 45 4c 46 00 00 00 00 00 00 00 00 ...
target_terminal_ours ()
Failed to read a valid object file image from memory.
Core was generated by `bash'.
target_fetch_registers (-1)
core:target_xfer_partial (2, (null), 0xbfd4bef0,  0x0,  0xef1402, 8) = 8, bytes =
 00 00 00 00 00 00 00 00
core:target_xfer_partial (2, (null), 0xbfd4bef1,  0x0,  0xef1402, 7) = 7, bytes
= 00 00 00 00 00 00 00
#0  0x00ef1402 in ?? ()


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[Bug general/3697] gdb cannot read part of fcore core files (can read notes)

[pmuldoon at redhat dot com]

------- Additional Comments From pmuldoon at redhat dot com  2006-12-11 22:59 -------
Caused by incomplete memory transger via PtraceByteBuffer.get()

2006-12-11  Phil Muldoon  <pmuldoon@redhat.com>

	* eio/ByteBuffer.java (get): Change to use peekFully over peek.

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[Bug general/3697] gdb cannot read part of fcore core files (can read notes)

[pmuldoon at redhat dot com]

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|frysk-bugzilla at sourceware|pmuldoon at redhat dot com
                   |dot org                     |


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