binutils-gdb modified for the FreeChainXenon project
Find a file
Steinar H. Gunderson b43771b045 add a trie to map quickly from address range to compilation unit
When using perf to profile large binaries, _bfd_dwarf2_find_nearest_line()
becomes a hotspot, as perf wants to get line number information
(for inline-detection purposes) for each and every sample. In Chromium
in particular (the content_shell binary), this entails going through
475k address ranges, which takes a long time when done repeatedly.

Add a radix-256 trie over the address space to quickly map address to
compilation unit spaces; for content_shell, which is 1.6 GB when some
(but not full) debug information turned is on, we go from 6 ms to
0.006 ms (6 µs) for each lookup from address to compilation unit, a 1000x
speedup.

There is a modest RAM increase of 180 MB in this binary (the existing
linked list over ranges uses about 10 MB, and the entire perf job uses
between 2–3 GB for a medium-size profile); for smaller binaries with few
ranges, there should be hardly any extra RAM usage at all.
2022-05-20 16:10:34 +02:00
bfd add a trie to map quickly from address range to compilation unit 2022-05-20 16:10:34 +02:00
binutils Fix potentially uninitialised variables in the Windows tools 2022-05-19 15:05:12 +01:00
config Add markers for 2.38 branch 2022-01-22 12:08:55 +00:00
contrib Import mklog.py from gcc repo 2020-09-25 10:24:44 -04:00
cpu opcodes cgen: remove use of PTR 2022-05-11 09:49:20 +09:30
elfcpp Add markers for 2.38 branch 2022-01-22 12:08:55 +00:00
etc Update year range in copyright notice of binutils files 2022-01-02 12:04:28 +10:30
gas arm: Fix system register fpcxt_ns and fpcxt_s naming convention. 2022-05-19 16:51:21 +01:00
gdb gdb/doc: use @value{GDBP} in 'info pretty-printer' example 2022-05-19 15:22:04 +01:00
gdbserver Use aarch64_features to describe register features in target descriptions. 2022-05-18 13:32:04 -07:00
gdbsupport gdbsupport: fix path_join crash with -std=c++17 and -D_GLIBCXX_DEBUG 2022-05-19 08:04:13 -04:00
gnulib gnulib: update to bd11400942d6 2022-05-02 10:54:19 -04:00
gold Fix compile time warning building gold with Clang-14. 2022-05-18 16:29:57 +01:00
gprof gprof: remove use of PTR 2022-05-10 11:21:37 +09:30
gprofng gprofng: include percentages in default metrics list 2022-05-09 22:42:09 -07:00
include Tidy warn-execstack handling 2022-05-20 16:11:25 +09:30
intl Regenerate a couple of files 2021-11-15 12:20:12 +10:30
ld Tidy warn-execstack handling 2022-05-20 16:11:25 +09:30
libbacktrace libtool.m4: fix the NM="/nm/over/here -B/option/with/path" case 2022-03-25 12:02:35 +00:00
libctf libctf: impose an ordering on conflicting types 2022-04-28 11:47:12 +01:00
libdecnumber Run autoreconf -vf throughout 2020-07-29 16:03:55 -04:00
libiberty Import libiberty from gcc 2022-05-13 16:43:15 +09:30
opcodes x86: shrink op_riprel 2022-05-18 14:39:58 +02:00
readline gdb/readline: fix extra 'quit' message problem 2022-05-07 10:49:27 +01:00
sim sim: remove use of PTR 2022-05-13 14:32:54 +09:30
texinfo
zlib Rebase the zlib sources to the 1.2.12 release 2022-04-12 16:24:10 +01:00
.cvsignore
.editorconfig Add top-level .editorconfig file 2022-01-28 08:25:42 -05:00
.gitattributes
.gitignore Add gnu global outputs to .gitignore 2020-12-02 10:00:27 -05:00
ar-lib Bump to autoconf 2.69 and automake 1.15.1 2018-06-19 16:55:06 -04:00
ChangeLog Rebase the zlib sources to the 1.2.12 release 2022-04-12 16:24:10 +01:00
compile
config-ml.in
config.guess Update the config.guess and config.sub files from the master repository and regenerate files. 2022-01-17 16:21:22 +00:00
config.rpath
config.sub Update the config.guess and config.sub files from the master repository and regenerate files. 2022-01-17 16:21:22 +00:00
configure Pass PKG_CONFIG_PATH down from top-level Makefile 2022-04-08 10:56:41 -04:00
configure.ac Pass PKG_CONFIG_PATH down from top-level Makefile 2022-04-08 10:56:41 -04:00
COPYING
COPYING.LIB
COPYING.LIBGLOSS
COPYING.NEWLIB
COPYING3
COPYING3.LIB
depcomp
djunpack.bat
install-sh
libtool.m4 libtool.m4: fix the NM="/nm/over/here -B/option/with/path" case 2022-03-25 12:02:35 +00:00
ltgcc.m4
ltmain.sh
ltoptions.m4
ltsugar.m4
ltversion.m4
lt~obsolete.m4
MAINTAINERS MAINTAINERS: Update path to readline config.{sub,guess} files 2021-05-24 18:11:49 +02:00
Makefile.def gprofng: a new GNU profiler 2022-03-11 08:58:31 +00:00
Makefile.in Pass PKG_CONFIG_PATH down from top-level Makefile 2022-04-08 10:56:41 -04:00
Makefile.tpl Pass PKG_CONFIG_PATH down from top-level Makefile 2022-04-08 10:56:41 -04:00
makefile.vms
missing
mkdep
mkinstalldirs
move-if-change
multilib.am Merge autoconf / automake update changes from GCC. 2018-10-31 17:10:56 +00:00
README
README-maintainer-mode Bump to autoconf 2.69 and automake 1.15.1 2018-06-19 16:55:06 -04:00
setup.com
src-release.sh gprofng: a new GNU profiler 2022-03-11 08:58:31 +00:00
symlink-tree
test-driver Bump to autoconf 2.69 and automake 1.15.1 2018-06-19 16:55:06 -04:00
ylwrap

		   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.