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Sergio Durigan Junior 0ea5cda861 Only call {set,clear}_semaphore probe function if they are not NULL
This patch is a response to what I commented on:

  <https://sourceware.org/ml/gdb-patches/2014-10/msg00046.html>

When reviewing Jose's USDT probe support patches.  Basically, in his
patch he had to create dummy functions for the set_semaphore and the
clear_semaphore methods of probe_ops (gdb/probe.h), because those
functions were called inconditionally from inside gdb/breakpoint.c and
gdb/tracepoint.c.  However, the semaphore concept may not apply to all
types of probes, and this is the case here: USDT probes do not have
semaphores (although SDT probes do).

Anyway, this is a simple (almost obvious) patch to guard the call to
{set,clear}_semaphore.  It does not introduce any regression on a
Fedora 20 x86_64.

I will apply it in a few days in case there is no comment.

gdb/ChangeLog:
2014-10-14  Sergio Durigan Junior  <sergiodj@redhat.com>

	* breakpoint.c (bkpt_probe_insert_location): Call set_semaphore
	only if it is not NULL.
	(bkpt_probe_remove_location): Likewise, for clear_semaphore.
	* probe.h (struct probe_ops) <set_semaphore>: Update comment.
	(struct probe_ops) <clear_semaphore>: Likewise.
	* tracepoint.c (start_tracing): Call set_semaphore only if it is
	not NULL.
	(stop_tracing): Likewise, for clear_semaphore.
2014-10-14 14:46:18 -04:00
bfd Convert mov to lea only if r_offset >= 2 2014-10-14 08:03:32 -07:00
binutils Add NEWS markers for 2.25. 2014-10-14 09:49:47 +02:00
config
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gas Add NEWS markers for 2.25. 2014-10-14 09:49:47 +02:00
gdb Only call {set,clear}_semaphore probe function if they are not NULL 2014-10-14 14:46:18 -04:00
gold Fix error from previous patch where tosize and tovalue were redefined 2014-09-30 16:06:50 -07:00
gprof
include Sync libiberty with upstream GCC. 2014-10-11 10:29:10 +01:00
intl
ld Add NEWS markers for 2.25. 2014-10-14 09:49:47 +02:00
libdecnumber
libiberty Sync libiberty with upstream GCC. 2014-10-11 10:29:10 +01:00
opcodes This is a series of patches that add support for the SPARC M7 cpu to 2014-10-09 13:16:53 +01:00
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ChangeLog Add aarch64 to list of targets that support gold. 2014-10-03 14:48:14 -07:00
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configure Add aarch64 to list of targets that support gold. 2014-10-03 14:48:14 -07:00
configure.ac Add aarch64 to list of targets that support gold. 2014-10-03 14:48:14 -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.