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Pedro Alves 4e63d0ac89 Fix gdb.mi/mi-nsmoribund.exp timeouts
The PPC64 buildbot has been showing timeouts in mi-nsmoribund.exp,
like this:

 (...)
 -thread-info
 FAIL: gdb.mi/mi-nsmoribund.exp: thread state: all running except the breakpoint thread (timeout)

... and I can reproduce this on gcc110 (PPC64) on the gcc compile
farm.

That is, the test sends "-thread-info" to GDB, but GDB never replies
back.

The problem is that these machines are too fast for gdb.  :-)

That test has a few threads running the same tight loop, and
constantly hitting a thread-specific breakpoint that needs to be
stepped over.  If threads trip on breakpoints fast enough that
linux-nat.c's event pipe associated with SIGCHLD is constantly being
written to, even if the stdin file descriptor also has an event to
handle, gdb never gets to it. because linux-nat.c's pipe comes first
in the set of descriptors served by the poll/select code in the event
loop.

Fix this by having the event loop serve file event sources in
round-robin-like fashion, similarly to how its done in
gdb_do_one_event.

Unfortunately, the poll and the select variants each need their own
fixing.

Tested on x86_64 Fedora 20 (poll and select variants), and PPC64
Fedora 18.  Fixes the timeout in the PPC64 machine in the compile farm
that times out without this, and I won't be surprised if it fixes
other random timeouts in other tests.

(gdbserver's copy of the event-loop doesn't need this (yet), as it
still pushes all ready events to an event queue.  That is, it hasn't
had 70b66289 merged yet.  We should really merge both event-loop.c
copies into a single shared file, but that's for another day.)

gdb/ChangeLog:
2015-05-15  Pedro Alves  <palves@redhat.com>
	    Simon Marchi  <simon.marchi@ericsson.com>

	* event-loop.c (gdb_notifier) <next_file_handler,
	next_poll_fds_index>: New fields.
	(get_next_file_handler_to_handle_and_advance): New function.
	(delete_file_handler): If deleting the next file handler to
	handle, advance to the next file handler.
	(gdb_wait_for_event): Bail early if no event fired.  Poll file
	handlers in round-robin fashion.
2015-05-15 16:26:53 +01:00
bfd Automatic date update in version.in 2015-05-15 00:00:08 +00:00
binutils Fix PR18374 by making readelf and objdump ignore end-of-list markers in the .debug_loc section if there are relocations against them. 2015-05-15 11:24:33 +01:00
config Set zlibdir/zlibinc with top_builddir/top_srcdir 2015-04-02 05:43:07 -07:00
cpu or1k: add missing l.msync, l.psync and l.psync instructions. 2014-07-20 20:26:09 +03:00
elfcpp Add chdr_size, Chdr, Chdr_write and Chdr_data 2015-04-08 10:29:40 -07:00
etc PR external/{16327,16328}: Remove etc/configure.texi and etc/standards.texi. 2014-06-27 11:33:25 +02:00
gas Add -mshared option to x86 ELF assembler 2015-05-15 03:30:53 -07:00
gdb Fix gdb.mi/mi-nsmoribund.exp timeouts 2015-05-15 16:26:53 +01:00
gold Change Section_id type to use Relobj* instead of Object*. 2015-05-02 08:43:27 -07:00
gprof Updated translations for various binutils components. 2015-04-29 16:26:14 +01:00
include [AArch64] Add R_AARCH64_P32_LD32_GOTPAGE_LO14 to elf header 2015-05-12 13:47:15 +01:00
intl
ld Update description of the ASSERT linker script command to note its interation with PROVIDEd symbols. 2015-05-14 12:32:12 +01:00
libdecnumber Another part of fixing "make TAGS". 2015-01-22 21:07:31 +02:00
libiberty libiberty/mkstemps.c: Include <time.h> if <sys/time.h> not available. 2015-05-08 10:15:28 -07:00
opcodes Fix some PPC assembler errors. 2015-05-14 21:02:50 -05:00
readline Fix executable indicator in file name completion on Windows. 2014-12-30 21:14:25 +02:00
sim Switch erc32 simulator copyright headers to FSF. 2015-05-08 07:23:15 -07:00
texinfo
zlib Add missing ChangeLog entry 2015-03-31 13:15:01 -07:00
.cvsignore
.gitattributes Add a .gitattributes file for use with git-merge-changelog 2014-07-25 18:07:23 -04:00
.gitignore Sync the root .gitignore file with GCC's. 2013-01-11 15:17:35 +00:00
ChangeLog Disable the configuration of GDB for HPUX targets. 2015-05-13 17:32:01 +01:00
compile Update from upstream Automake 2014-11-16 13:43:48 +01:00
config-ml.in Sync config-ml.in with GCC trunk 2015-03-17 05:15:34 -07:00
config.guess Update config.guess and config.sub to the latest upstream version 2015-03-30 16:28:14 -04:00
config.rpath
config.sub Update config.guess and config.sub to the latest upstream version 2015-03-30 16:28:14 -04:00
configure Disable the configuration of GDB for HPUX targets. 2015-05-13 17:32:01 +01:00
configure.ac Disable the configuration of GDB for HPUX targets. 2015-05-13 17:32:01 +01:00
COPYING
COPYING3
COPYING3.LIB
COPYING.LIB
COPYING.LIBGLOSS 2013-01-07 Jeff Johnston <jjohnstn@redhat.com> 2013-01-07 21:39:26 +00:00
COPYING.NEWLIB 2013-10-01 Jeff Johnston <jjohnstn@redhat.com> 2013-10-01 18:14:04 +00:00
depcomp Update from upstream Automake 2014-11-16 13:43:48 +01:00
djunpack.bat
install-sh Update from upstream Automake 2014-11-16 13:43:48 +01:00
libtool.m4 Update libtool.m4 from GCC trunk 2014-11-24 09:14:09 -08:00
lt~obsolete.m4
ltgcc.m4
ltmain.sh PR target/59788 2014-02-06 11:01:57 +01:00
ltoptions.m4
ltsugar.m4
ltversion.m4
MAINTAINERS Update description of ownership of files in include/ 2014-11-04 16:14:14 -08:00
Makefile.def Configure zlib with --enable-host-shared for shared bfd 2015-05-01 08:34:08 -07:00
Makefile.in Configure zlib with --enable-host-shared for shared bfd 2015-05-01 08:34:08 -07:00
Makefile.tpl Update top-level files from GCC trunk 2015-03-16 09:12:37 -07:00
makefile.vms
missing Update from upstream Automake 2014-11-16 13:43:48 +01:00
mkdep
mkinstalldirs Update from upstream Automake 2014-11-16 13:43:48 +01:00
move-if-change Update `move-if-change' from gnulib 2014-11-16 17:04:02 +01:00
README
README-maintainer-mode
setup.com
src-release.sh Adjust src-release.sh for sim using the gdb create-version.sh. 2015-04-15 04:08:51 +02:00
symlink-tree
ylwrap Update from upstream Automake 2014-11-16 13:43:48 +01:00

		   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.