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[binutils-gdb] GDBserver: Fix ignored Ctrl-C after reconnection
- From: sergiodj+buildbot at sergiodj dot net
- To: gdb-testers at sourceware dot org
- Date: Thu, 16 Nov 2017 11:44:22 -0500
- Subject: [binutils-gdb] GDBserver: Fix ignored Ctrl-C after reconnection
- Authentication-results: sourceware.org; auth=none
*** TEST RESULTS FOR COMMIT e849ea896bcdc3da8caff02eb6dc91dc85dd8a7e ***
Author: Pedro Alves <palves@redhat.com>
Branch: master
Commit: e849ea896bcdc3da8caff02eb6dc91dc85dd8a7e
GDBserver: Fix ignored Ctrl-C after reconnection
This fixes the issue reported by Dmitry Antipov <dantipov@nvidia.com>
here:
https://sourceware.org/ml/gdb/2017-10/msg00048.html
The problem is that GDBserver stops listening to Ctrl-C/interrupt
requests if you disconnect and reconnect back.
Dmitry wrote:
~~~
Currently gdbserver installs SIGIO handler just once, in
initialize_async_io() called from captured_main(), and this handler is
removed when remote_desc is closed in remote_close(). Next, when a
new instance of remote_desc is fetched from accept() and has '\003'
arrived, input_interrupt() is never called because it is not
registered as SIGIO handler.
~~~
The fix here is not remove the SIGIO handler in the first place, thus
going back to the original before-first-connection state.
(I haven't gone back to try it, but I think this was a regression
caused by commit 8b2073398477 ("[GDBserver] Block and unblock SIGIO"),
which was what made remote_close remove the signal handler.)
New test included.
gdb/gdbserver/ChangeLog:
2017-11-16 Pedro Alves <palves@redhat.com>
* remote-utils.c (remote_close): Block SIGIO signals instead of
uninstalling the SIGIO handler.
gdb/testsuite/ChangeLog:
2017-11-16 Pedro Alves <palves@redhat.com>
* gdb.server/reconnect-ctrl-c.c: New file.
* gdb.server/reconnect-ctrl-c.exp: New file.
- Follow-Ups:
- Failures on Fedora-x86_64-native-gdbserver-m32, branch master
- Failures on Fedora-x86_64-native-gdbserver-m64, branch master
- Failures on Fedora-x86_64-native-extended-gdbserver-m64, branch master
- Failures on Fedora-i686, branch master
- Failures on Fedora-x86_64-native-extended-gdbserver-m32, branch master
- Failures on Fedora-x86_64-cc-with-index, branch master
- Failures on Fedora-s390x-m64, branch master
- Failures on Ubuntu-AArch64-native-gdbserver-m64, branch master
- Failures on Ubuntu-AArch64-m64, branch master
- Failures on Ubuntu-AArch32-m32, branch master
- Failures on Ubuntu-AArch32-native-extended-gdbserver-m32, branch master
- Failures on Ubuntu-AArch32-native-gdbserver-m32, branch master