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Stephen Roberts 4ee89e903d Replace the linear search in find_pc_sect_line with a binary search.
This patch addresses slowness when setting breakpoints, especially in
heavily templatized code. Profiling showed that find_pc_sect_line in
symtab.c was the performance bottleneck.  The original logic performed a
linear search over ordered data. This patch uses a binary search, as
suggested by comments around the function.  There are no behavioural
changes, but gdb is now faster at setting breakpoints in template code.
Tested using on make check on an x86 target. The optimisation speeds up
the included template-breakpoints.py performance test by a factor of 7
on my machine.

ChangeLog:

2018-03-20  Stephen Roberts  <stephen.roberts@arm.com>

        * gdb/symtab.c (find_pc_sect_line): now uses binary search.

gdb/testsuite/

        * gdb.perf/template-breakpoints.cc: New file.
        * gdb.perf/template-breakpoints.exp: New file.
        * gdb.perf/template-breakpoints.py: New file.
2018-03-20 14:04:17 +00:00
bfd Set non_ir_ref_dynamic if a symbol is made dynamic 2018-03-20 03:51:48 -07:00
binutils Updated Russian and Spanish translations for the binutils/ sub-directory. 2018-03-20 11:05:18 +00:00
config
cpu opcodes error messages 2018-03-03 11:34:26 +10:30
elfcpp
etc
gas Updated Spanish translation for the bfd/ sub-directory, and updated Ukranian translation for the gas/ sub-directory. 2018-03-19 10:49:13 +00:00
gdb Replace the linear search in find_pc_sect_line with a binary search. 2018-03-20 14:04:17 +00:00
gold New option -z,keep-text-section prefix. 2018-03-07 12:15:49 -08:00
gprof Add missing translations to ALL_LINGUAS 2018-03-01 09:17:02 +10:30
include RISC-V: Add .insn support. 2018-03-14 16:04:03 -07:00
intl
ld gc.exp: Remove extraneous LD flags from the personality test 2018-03-20 11:48:59 +00:00
libdecnumber
libiberty
opcodes RISC-V: Add .insn support. 2018-03-14 16:04:03 -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.