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[binutils-gdb] Workaround gdbserver<7.7 for setfs
- From: sergiodj+buildbot at sergiodj dot net
- To: gdb-testers at sourceware dot org
- Date: Wed, 06 Apr 2016 15:19:21 -0400
- Subject: [binutils-gdb] Workaround gdbserver<7.7 for setfs
- Authentication-results: sourceware.org; auth=none
*** TEST RESULTS FOR COMMIT 319cb5d0cf7ba3bc0e77ab420cfcf75568d722b4 ***
Author: Jan Kratochvil <jan.kratochvil@redhat.com>
Branch: master
Commit: 319cb5d0cf7ba3bc0e77ab420cfcf75568d722b4
Workaround gdbserver<7.7 for setfs
With current FSF GDB HEAD and old FSF gdbserver I expected I could do:
gdb -ex 'file target:/root/redhat/threadit' -ex 'target remote :1234'
(supplying that unsupported qXfer:exec-file:read by "file")
But that does not work because:
Sending packet: $vFile:setfs:0#bf...Packet received: OK
Packet vFile:setfs (hostio-setfs) is supported
...
Sending packet: $vFile:setfs:104#24...Packet received: OK
"target:/root/redhat/threadit": could not open as an executable file: Invalid argument
GDB documentation says:
The valid responses to Host I/O packets are:
An empty response indicates that this operation is not recognized.
This "empty response" vs. "OK" was a bug in gdbserver < 7.7. It was fixed by:
commit e7f0d979dd5cc4f8b658df892e93db69d6d660b7
Author: Yao Qi <yao@codesourcery.com>
Date: Tue Dec 10 21:59:20 2013 +0800
Fix a bug in matching notifications.
Message-ID: <1386684626-11415-1-git-send-email-yao@codesourcery.com>
https://sourceware.org/ml/gdb-patches/2013-12/msg00373.html
2013-12-10 Yao Qi <yao@codesourcery.com>
* notif.c (handle_notif_ack): Return 0 if no notification
matches.
with unpatched old FSF gdbserver and patched FSF GDB HEAD:
gdb -ex 'file target:/root/redhat/threadit' -ex 'target remote :1234'
Sending packet: $vFile:setfs:0#bf...Packet received: OK
Packet vFile:setfs (hostio-setfs) is NOT supported
...
(gdb) info sharedlibrary
From To Syms Read Shared Object Library
0x00007ffff7ddbae0 0x00007ffff7df627a Yes (*) target:/lib64/ld-linux-x86-64.so.2
0x00007ffff7bc48a0 0x00007ffff7bcf514 Yes (*) target:/lib64/libpthread.so.0
gdb/ChangeLog
2016-04-06 Jan Kratochvil <jan.kratochvil@redhat.com>
* remote.c (struct remote_state): New field unknown_v_replies_ok.
(packet_config_support): Read it.
(remote_start_remote): Set it.
- Follow-Ups:
- Failures on Fedora-i686, branch master
- Failures on Fedora-x86_64-cc-with-index, branch master
- Failures on Fedora-x86_64-m32, branch master
- Failures on Fedora-x86_64-native-extended-gdbserver-m32, branch master
- Failures on Debian-i686, branch master
- Failures on Fedora-ppc64be-cc-with-index, branch master
- Failures on Fedora-x86_64-native-extended-gdbserver-m64, branch master
- Failures on Debian-x86_64-native-extended-gdbserver-m64, branch master
- Failures on Fedora-x86_64-native-gdbserver-m32, branch master
- Failures on AIX-POWER7-plain, branch master
- Failures on Debian-i686-native-extended-gdbserver, branch master
- Failures on Debian-s390x-native-extended-gdbserver-m64, branch master
- Failures on Fedora-ppc64le-native-extended-gdbserver-m64, branch master
- Failures on Fedora-ppc64be-native-extended-gdbserver-m64, branch master