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Pedro Alves b2ee242b93 PR gdb/17096: async support breaks remote debugging on Windows
On Windows, with "maint set target-async on" (the default since
a09dd441), Ctrl-C fails to stop a remote target.

With maint target-async on, the SIGINT signal handler doesn't send the
remote interrupt request immediately.  Instead, it marks an async
handler as ready, and then the main event loop wakes up and notices
that the SIGINT async signal handler token was set, and calls the
corresponding event handler, which sends the remote interrupt request.

On POSIX-like systems, the SIGINT signal makes the select/poll in the
main event loop wake up / return with EINTR.  However, on Windows,
signal handlers run on a separate thread, and Windows doesn't really
have a concept of EINTR.  So, just marking the async handler
(effectively just setting a flag) does not wake up gdb_select.
Instead, we need to call gdb_call_async_signal_handler from the signal
handler.  The Windows version (in mingw-hdep.c) sets a Windows event
that gdb_select's WaitForMultipleObjects is waiting for.

Confirmed that with this, Ctrl-C interrupts the remote target on
Windows.  Also regression tested on x86_64 Fedora 20 against
GDBserver.

gdb/
2014-07-07  Pedro Alves  <palves@redhat.com>

	* remote.c (async_handle_remote_sigint)
	(async_handle_remote_sigint_twice): Call
	gdb_call_async_signal_handler instead of
	mark_async_signal_handler.
2014-07-07 17:51:04 +01:00
bfd Adds support for writing values to AVR system I/O registers. 2014-07-07 16:15:19 +01:00
binutils Remove an accidental commit. 2014-07-07 17:46:05 +01:00
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elfcpp 2014-07-02 Jing Yu <jingyu@google.com> 2014-07-02 16:21:23 -07:00
etc PR external/{16327,16328}: Remove etc/configure.texi and etc/standards.texi. 2014-06-27 11:33:25 +02:00
gas Adds support for writing values to AVR system I/O registers. 2014-07-07 16:15:19 +01:00
gdb PR gdb/17096: async support breaks remote debugging on Windows 2014-07-07 17:51:04 +01:00
gold Update gold POTFILES.in 2014-07-04 12:32:14 +09:30
gprof Rename configure.in to configure.ac 2014-07-04 13:40:28 +09:30
include Adds support for writing values to AVR system I/O registers. 2014-07-07 16:15:19 +01:00
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sim Sim - Use long int format instead of int to avoid compiling warning 2014-06-30 17:40:02 -07:00
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		   README for GNU development tools

This directory contains various GNU compilers, assemblers, linkers, 
debuggers, etc., plus their support routines, definitions, and documentation.

If you are receiving this as part of a GDB release, see the file gdb/README.
If with a binutils release, see binutils/README;  if with a libg++ release,
see libg++/README, etc.  That'll give you info about this
package -- supported targets, how to use it, how to report bugs, etc.

It is now possible to automatically configure and build a variety of
tools with one command.  To build all of the tools contained herein,
run the ``configure'' script here, e.g.:

	./configure 
	make

To install them (by default in /usr/local/bin, /usr/local/lib, etc),
then do:
	make install

(If the configure script can't determine your type of computer, give it
the name as an argument, for instance ``./configure sun4''.  You can
use the script ``config.sub'' to test whether a name is recognized; if
it is, config.sub translates it to a triplet specifying CPU, vendor,
and OS.)

If you have more than one compiler on your system, it is often best to
explicitly set CC in the environment before running configure, and to
also set CC when running make.  For example (assuming sh/bash/ksh):

	CC=gcc ./configure
	make

A similar example using csh:

	setenv CC gcc
	./configure
	make

Much of the code and documentation enclosed is copyright by
the Free Software Foundation, Inc.  See the file COPYING or
COPYING.LIB in the various directories, for a description of the
GNU General Public License terms under which you can copy the files.

REPORTING BUGS: Again, see gdb/README, binutils/README, etc., for info
on where and how to report problems.