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* [Bug gdb/17407] New: Regression for Linux vDSO reading
@ 2014-09-17 18:59 jan.kratochvil at redhat dot com
2014-09-18 6:26 ` [Bug gdb/17407] " cvs-commit at gcc dot gnu.org
` (4 more replies)
0 siblings, 5 replies; 6+ messages in thread
From: jan.kratochvil at redhat dot com @ 2014-09-17 18:59 UTC (permalink / raw)
To: gdb-prs
https://sourceware.org/bugzilla/show_bug.cgi?id=17407
Bug ID: 17407
Summary: Regression for Linux vDSO reading
Product: gdb
Version: 7.8
Status: NEW
Severity: normal
Priority: P2
Component: gdb
Assignee: jan.kratochvil at redhat dot com
Reporter: jan.kratochvil at redhat dot com
Host: x86_64-linux-gnu
Target: x86_64-linux-gnu
since
5979d6b69b20a8355ea94b75fad97415fce4788c
https://sourceware.org/git/?p=binutils-gdb.git;a=commitdiff;h=5979d6b69b20a8355ea94b75fad97415fce4788c
vdso handling
https://sourceware.org/ml/binutils/2014-03/msg00082.html
https://sourceware.org/ml/binutils/2014-04/msg00003.html
Message-ID:
<A78C989F6D9628469189715575E55B230AA884EB@IRSMSX104.ger.corp.intel.com>
I get on
kernel-3.16.2-200.fc20.x86_64
https://koji.fedoraproject.org/koji/buildinfo?buildID=575860
attaching its vdso.bin.gz
GDB (FSF HEAD 5e43d46791c4c66fd83947a12d4f716b561a9103) regression:
reproducer for Fedora systems (as Fedora glibc is patched):
./gdb -ex r --args $PWD/../../glibc-root/lib/ld-linux-x86-64.so.2
--library-path $PWD/../../glibc-root/lib:/lib64 ./gdb
assuming an untested reproducer for more upstream glibc (Debian?); not tested:
./gdb -ex start ./gdb
actual result / FAIL:
Got object file from memory but can't read symbols: File truncated.
expected result / PASS:
warning: Could not load shared library symbols for linux-vdso.so.1.
Do you need "set solib-search-path" or "set sysroot"?
[bfd patch] Regression for Linux vDSO in GDB
https://sourceware.org/ml/binutils/2014-09/msg00140.html
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* [Bug gdb/17407] Regression for Linux vDSO reading
2014-09-17 18:59 [Bug gdb/17407] New: Regression for Linux vDSO reading jan.kratochvil at redhat dot com
@ 2014-09-18 6:26 ` cvs-commit at gcc dot gnu.org
2014-09-18 6:29 ` cvs-commit at gcc dot gnu.org
` (3 subsequent siblings)
4 siblings, 0 replies; 6+ messages in thread
From: cvs-commit at gcc dot gnu.org @ 2014-09-18 6:26 UTC (permalink / raw)
To: gdb-prs
https://sourceware.org/bugzilla/show_bug.cgi?id=17407
--- Comment #1 from cvs-commit at gcc dot gnu.org <cvs-commit at gcc dot gnu.org> ---
This is an automated email from the git hooks/post-receive script. It was
generated because a ref change was pushed to the repository containing
the project "gdb and binutils".
The branch, master has been updated
via 92c9bcd479e4cb388a7f286fc42414b115cfc656 (commit)
from 039b3b7b034f4c9ac9e38f8b3e7367e108f89f8a (commit)
Those revisions listed above that are new to this repository have
not appeared on any other notification email; so we list those
revisions in full, below.
- Log -----------------------------------------------------------------
https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=92c9bcd479e4cb388a7f286fc42414b115cfc656
commit 92c9bcd479e4cb388a7f286fc42414b115cfc656
Author: Jan Kratochvil <jan.kratochvil@redhat.com>
Date: Thu Sep 18 08:21:40 2014 +0200
Fix regression for Linux vDSO in GDB (PR gdb/17407).
since
5979d6b69b20a8355ea94b75fad97415fce4788c
https://sourceware.org/git/?p=binutils-gdb.git;a=commitdiff;h=5979d6b69b20a8355ea94b75fad97415fce4788c
vdso handling
https://sourceware.org/ml/binutils/2014-03/msg00082.html
https://sourceware.org/ml/binutils/2014-04/msg00003.html
Message-ID:
<A78C989F6D9628469189715575E55B230AA884EB@IRSMSX104.ger.corp.intel.com>
I get on
kernel-3.16.2-200.fc20.x86_64
https://koji.fedoraproject.org/koji/buildinfo?buildID=575860
attaching its vdso.bin.gz
GDB (FSF HEAD 5e43d46791c4c66fd83947a12d4f716b561a9103) regression:
reproducer:
./gdb -ex start ./gdb
actual result / FAIL:
Got object file from memory but can't read symbols: File truncated.
expected result / PASS:
<nothing>
or / PASS:
warning: Could not load shared library symbols for linux-vdso.so.1.
Do you need "set solib-search-path" or "set sysroot"?
That "warning: Could not load shared library..." is mostly harmless (it is
a bug in GDB), in the FAIL case it is not printed just because
bfd_check_format() fails there.
It seems logical to me this way when the 'size' parameter has been already
added.
Alan Modra:
I was wrongly thinking that the section headers were
always last when I wrote that code. (They are now! If you relink
that vdso with current binutils master you won't hit this problem, but
that of course doesn't help existing kernels.)
I do not see a regression for add-symbol-file-from-memory for
libncurses.so.5
from the original thread above.
Start of section headers: 1080 (bytes into file)
Size of section headers: 64 (bytes)
Number of section headers: 13
Section header string table index: 8
Section Headers:
[Nr] Name Type Address Off Size ES
Flg Lk Inf Al
[ 8] .fake_shstrtab STRTAB 0000000000000780 000780 000076 00
A 0 0 32
Program Headers:
Type Offset VirtAddr PhysAddr FileSiz
MemSiz Flg Align
LOAD 0x000000 0x0000000000000000 0x0000000000000000 0x0012fe
0x0012fe R E 0x1000
size == 0x2000
shdr_end == 0x778 == 1080 + 13 * 64
high_offset == 0x12fe
else if (size >= shdr_end)
- high_offset = shdr_end;
+ high_offset = size;
But then 0x778 < 0x780 for "Section header string table index" so whole
bfd_check_format() fails because section headers were not cleared here:
/* If the segments visible in memory didn't include the section headers,
then clear them from the file header. */
if (high_offset < shdr_end)
bfd/ChangeLog
2014-09-18 Jan Kratochvil <jan.kratochvil@redhat.com>
PR gdb/17407
* elfcode.h (bfd_from_remote_memory): Use SIZE for HIGH_OFFSET.
-----------------------------------------------------------------------
Summary of changes:
bfd/ChangeLog | 5 +++++
bfd/elfcode.h | 2 +-
2 files changed, 6 insertions(+), 1 deletions(-)
--
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* [Bug gdb/17407] Regression for Linux vDSO reading
2014-09-17 18:59 [Bug gdb/17407] New: Regression for Linux vDSO reading jan.kratochvil at redhat dot com
2014-09-18 6:26 ` [Bug gdb/17407] " cvs-commit at gcc dot gnu.org
@ 2014-09-18 6:29 ` cvs-commit at gcc dot gnu.org
2014-09-18 6:31 ` jan.kratochvil at redhat dot com
` (2 subsequent siblings)
4 siblings, 0 replies; 6+ messages in thread
From: cvs-commit at gcc dot gnu.org @ 2014-09-18 6:29 UTC (permalink / raw)
To: gdb-prs
https://sourceware.org/bugzilla/show_bug.cgi?id=17407
--- Comment #2 from cvs-commit at gcc dot gnu.org <cvs-commit at gcc dot gnu.org> ---
This is an automated email from the git hooks/post-receive script. It was
generated because a ref change was pushed to the repository containing
the project "gdb and binutils".
The branch, gdb-7.8-branch has been updated
via 54fbc750b54271efb75ae11ce49f14c4234a9476 (commit)
from 6e4257b081621e64f4974d0c2cc12cbc5e542307 (commit)
Those revisions listed above that are new to this repository have
not appeared on any other notification email; so we list those
revisions in full, below.
- Log -----------------------------------------------------------------
https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=54fbc750b54271efb75ae11ce49f14c4234a9476
commit 54fbc750b54271efb75ae11ce49f14c4234a9476
Author: Jan Kratochvil <jan.kratochvil@redhat.com>
Date: Thu Sep 18 08:21:40 2014 +0200
Fix regression for Linux vDSO in GDB (PR gdb/17407).
since
5979d6b69b20a8355ea94b75fad97415fce4788c
https://sourceware.org/git/?p=binutils-gdb.git;a=commitdiff;h=5979d6b69b20a8355ea94b75fad97415fce4788c
vdso handling
https://sourceware.org/ml/binutils/2014-03/msg00082.html
https://sourceware.org/ml/binutils/2014-04/msg00003.html
Message-ID:
<A78C989F6D9628469189715575E55B230AA884EB@IRSMSX104.ger.corp.intel.com>
I get on
kernel-3.16.2-200.fc20.x86_64
https://koji.fedoraproject.org/koji/buildinfo?buildID=575860
attaching its vdso.bin.gz
GDB (FSF HEAD 5e43d46791c4c66fd83947a12d4f716b561a9103) regression:
reproducer:
./gdb -ex start ./gdb
actual result / FAIL:
Got object file from memory but can't read symbols: File truncated.
expected result / PASS:
<nothing>
or / PASS:
warning: Could not load shared library symbols for linux-vdso.so.1.
Do you need "set solib-search-path" or "set sysroot"?
That "warning: Could not load shared library..." is mostly harmless (it is
a bug in GDB), in the FAIL case it is not printed just because
bfd_check_format() fails there.
It seems logical to me this way when the 'size' parameter has been already
added.
Alan Modra:
I was wrongly thinking that the section headers were
always last when I wrote that code. (They are now! If you relink
that vdso with current binutils master you won't hit this problem, but
that of course doesn't help existing kernels.)
I do not see a regression for add-symbol-file-from-memory for
libncurses.so.5
from the original thread above.
Start of section headers: 1080 (bytes into file)
Size of section headers: 64 (bytes)
Number of section headers: 13
Section header string table index: 8
Section Headers:
[Nr] Name Type Address Off Size ES
Flg Lk Inf Al
[ 8] .fake_shstrtab STRTAB 0000000000000780 000780 000076 00
A 0 0 32
Program Headers:
Type Offset VirtAddr PhysAddr FileSiz
MemSiz Flg Align
LOAD 0x000000 0x0000000000000000 0x0000000000000000 0x0012fe
0x0012fe R E 0x1000
size == 0x2000
shdr_end == 0x778 == 1080 + 13 * 64
high_offset == 0x12fe
else if (size >= shdr_end)
- high_offset = shdr_end;
+ high_offset = size;
But then 0x778 < 0x780 for "Section header string table index" so whole
bfd_check_format() fails because section headers were not cleared here:
/* If the segments visible in memory didn't include the section headers,
then clear them from the file header. */
if (high_offset < shdr_end)
bfd/ChangeLog
2014-09-18 Jan Kratochvil <jan.kratochvil@redhat.com>
PR gdb/17407
* elfcode.h (bfd_from_remote_memory): Use SIZE for HIGH_OFFSET.
-----------------------------------------------------------------------
Summary of changes:
bfd/ChangeLog | 5 +++++
bfd/elfcode.h | 2 +-
2 files changed, 6 insertions(+), 1 deletions(-)
--
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^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug gdb/17407] Regression for Linux vDSO reading
2014-09-17 18:59 [Bug gdb/17407] New: Regression for Linux vDSO reading jan.kratochvil at redhat dot com
2014-09-18 6:26 ` [Bug gdb/17407] " cvs-commit at gcc dot gnu.org
2014-09-18 6:29 ` cvs-commit at gcc dot gnu.org
@ 2014-09-18 6:31 ` jan.kratochvil at redhat dot com
2014-10-29 19:48 ` cvs-commit at gcc dot gnu.org
2021-11-09 8:32 ` johnsjvi95 at gmail dot com
4 siblings, 0 replies; 6+ messages in thread
From: jan.kratochvil at redhat dot com @ 2014-09-18 6:31 UTC (permalink / raw)
To: gdb-prs
https://sourceware.org/bugzilla/show_bug.cgi?id=17407
Jan Kratochvil <jan.kratochvil at redhat dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
CC| |jan.kratochvil at redhat dot com
Resolution|--- |FIXED
--- Comment #3 from Jan Kratochvil <jan.kratochvil at redhat dot com> ---
Checked in and for 7.8.
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* [Bug gdb/17407] Regression for Linux vDSO reading
2014-09-17 18:59 [Bug gdb/17407] New: Regression for Linux vDSO reading jan.kratochvil at redhat dot com
` (2 preceding siblings ...)
2014-09-18 6:31 ` jan.kratochvil at redhat dot com
@ 2014-10-29 19:48 ` cvs-commit at gcc dot gnu.org
2021-11-09 8:32 ` johnsjvi95 at gmail dot com
4 siblings, 0 replies; 6+ messages in thread
From: cvs-commit at gcc dot gnu.org @ 2014-10-29 19:48 UTC (permalink / raw)
To: gdb-prs
https://sourceware.org/bugzilla/show_bug.cgi?id=17407
--- Comment #4 from cvs-commit at gcc dot gnu.org <cvs-commit at gcc dot gnu.org> ---
This is an automated email from the git hooks/post-receive script. It was
generated because a ref change was pushed to the repository containing
the project "gdb and binutils".
The annotated tag, gdb-7.8.1-release has been created
at 60cd8f8e7f38daf7d59e82b9fb3b8840a3a714c9 (tag)
tagging 21de41c04a26bb04f2e827d35fd48c991fa991b1 (commit)
replaces gdb-7.8-release
tagged by Joel Brobecker
on Wed Oct 29 12:47:08 2014 -0700
- Log -----------------------------------------------------------------
GDB 7.8.1 Release.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1
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upIAoI2vGr/6e6CNHxIinVYQ2IJCY/4V
=wgXR
-----END PGP SIGNATURE-----
Doug Evans (3):
Fix for PR 17247: Block SIGCHLD while initializing Guile.
PR guile/17367
PR python/17364
Eli Zaretskii (1):
Avoid compiler warnings about incomplete parameter types.
GDB Administrator (92):
Automatic date update in version.in
Automatic date update in version.in
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Jan Kratochvil (4):
Fix incorrect placement of two Intel gdb/NEWS items
Fix 'gcore' with exited threads
Fix crash on Python frame filters with unreadable arg
Fix regression for Linux vDSO in GDB (PR gdb/17407).
Joel Brobecker (5):
Document the GDB 7.8 release in gdb/ChangeLog
Bump GDB version number to 7.8.0.DATE-cvs.
Add "frame.h" #include in gdbarch.h.
state->dr_control_mirror == 0 failed assertion in gdbserver on Windows XP
Set GDB version number to 7.8.1.
Pedro Alves (9):
testsuite: refactor spawn and wait for attach
gdb/17347 - Regression: GDB stopped on run with attached process
Aarch64: Make CPSR a 32-bit register again in the target description
Make common code handle target_terminal_* idempotency
PR gdb/17472: With annotations, input while executing in the foreground
crashes readline/GDB
PR gdb/17300: Input after "c -a" crashes readline/GDB
PR gdb/17471: Repeating a background command makes it foreground
PR python/17372 - Python hangs when displaying help()
PR 17408 - assertion failure in switch_back_to_stepped_thread
Siva Chandra (1):
Fix xmethod Python so that it works with Python3.
Yao Qi (2):
Fix build/17104
Remove workaround to libbabeltrace 1.1.0 issue
-----------------------------------------------------------------------
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* [Bug gdb/17407] Regression for Linux vDSO reading
2014-09-17 18:59 [Bug gdb/17407] New: Regression for Linux vDSO reading jan.kratochvil at redhat dot com
` (3 preceding siblings ...)
2014-10-29 19:48 ` cvs-commit at gcc dot gnu.org
@ 2021-11-09 8:32 ` johnsjvi95 at gmail dot com
4 siblings, 0 replies; 6+ messages in thread
From: johnsjvi95 at gmail dot com @ 2021-11-09 8:32 UTC (permalink / raw)
To: gdb-prs
https://sourceware.org/bugzilla/show_bug.cgi?id=17407
Stewart <johnsjvi95 at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |johnsjvi95 at gmail dot com
--- Comment #5 from Stewart <johnsjvi95 at gmail dot com> ---
I was wrongly thinking that the section headers were
always last when I wrote that code. (They are now! If you relink
that vdso with current binutils master you won't hit this problem, but
that of course doesn't help existing kernels.)
https://hudsonvalleytree.com
--
You are receiving this mail because:
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end of thread, other threads:[~2021-11-09 8:32 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2014-09-17 18:59 [Bug gdb/17407] New: Regression for Linux vDSO reading jan.kratochvil at redhat dot com
2014-09-18 6:26 ` [Bug gdb/17407] " cvs-commit at gcc dot gnu.org
2014-09-18 6:29 ` cvs-commit at gcc dot gnu.org
2014-09-18 6:31 ` jan.kratochvil at redhat dot com
2014-10-29 19:48 ` cvs-commit at gcc dot gnu.org
2021-11-09 8:32 ` johnsjvi95 at gmail dot com
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