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Pedro Alves e87f0fe823 detach and breakpoint removal
A following patch will add a testcase that has a number of threads
constantly stepping over a breakpoint, and then has GDB detach the
process.  That testcase sometimes fails with the inferior crashing
with SIGTRAP after the detach because of the bug fixed by this patch,
when tested with the native target.

The problem is that target_detach removes breakpoints from the target
immediately, and that does not work with the native GNU/Linux target
(and probably no other native target) currently.  The test wouldn't
fail with this issue when testing against gdbserver, because gdbserver
does allow accessing memory while the current thread is running, by
transparently pausing all threads temporarily, without GDB noticing.
Implementing that in gdbserver was a lot of work, so I'm not looking
forward right now to do the same in the native target.  Instead, I
came up with a simpler solution -- push the breakpoints removal down
to the targets.  The Linux target conveniently already pauses all
threads before detaching them, since PTRACE_DETACH only works with
stopped threads, so we move removing breakpoints to after that.  Only
the remote and GNU/Linux targets support support async execution, so
no other target should really need this.

gdb/ChangeLog:

	* linux-nat.c (linux_nat_target::detach): Remove breakpoints
	here...
	* remote.c (remote_target::remote_detach_1): ... and here ...
	* target.c (target_detach): ... instead of here.
	* target.h (target_ops::detach): Add comment.
2021-02-03 01:15:12 +00:00
bfd Automatic date update in version.in 2021-02-03 00:00:07 +00:00
binutils readelf: Add 'R' and 'D' to "Key to Flags:" 2021-02-02 05:15:05 -08:00
config Implement a workaround for GNU mak jobserver 2021-01-12 05:45:44 -08:00
contrib Import mklog.py from gcc repo 2020-09-25 10:24:44 -04:00
cpu Add Changelog entries and NEWS entries for 2.36 branch 2021-01-09 10:40:28 +00:00
elfcpp Add Changelog entries and NEWS entries for 2.36 branch 2021-01-09 10:40:28 +00:00
etc Update year range in copyright notice of binutils files 2021-01-01 10:31:05 +10:30
gas Add Genode target support 2021-02-01 17:31:47 +00:00
gdb detach and breakpoint removal 2021-02-03 01:15:12 +00:00
gdbserver gdbserver: spurious SIGTRAP w/ detach while step-over in progress 2021-02-03 01:14:53 +00:00
gdbsupport Improve gdb_tilde_expand logic. 2021-01-23 17:17:38 +00:00
gnulib Update copyright year range in all GDB files 2021-01-01 12:12:21 +04:00
gold gold: Skip address size and segment selector for DWARF5 2021-01-28 04:21:31 -08:00
gprof Regen Makefile.in for jobserver.m4 aclocal.m4 dependency 2021-01-13 22:06:02 +10:30
include RISC-V: Indent and GNU coding standards tidy, also aligned the code. 2021-01-15 17:41:18 +08:00
intl Regen with blessed automake-1.15.1 2020-02-20 13:02:24 +10:30
ld PR27311, ld.bfd (symbol from plugin): undefined reference 2021-02-02 20:09:42 +10:30
libctf libctf, create: fix ctf_type_add of structs with unnamed members 2021-01-19 12:45:20 +00:00
libdecnumber Run autoreconf -vf throughout 2020-07-29 16:03:55 -04:00
libiberty GCC: Check if AR works with --plugin and rc 2021-01-11 16:26:51 -08:00
opcodes Segmentation fault i386-gen 2021-01-26 20:54:43 +10:30
readline Use readline's variant of Windows patch 2021-01-23 09:24:20 -07:00
sim sim: cgen-trace: tweak printf call 2021-01-31 17:31:44 -05:00
texinfo
zlib GCC: Check if AR works with --plugin and rc 2021-01-11 16:26:51 -08:00
.cvsignore
.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 ld: depend on libctf 2021-01-27 11:04:12 +00:00
compile
config-ml.in Update top level configure files by synchronizing them with gcc. 2018-01-10 15:29:21 +00:00
config.guess Update config.sub and config.guess 2021-01-05 15:55:59 +10:30
config.rpath
config.sub config.sub update broke powerpc-eabivle 2021-01-07 08:56:28 +10:30
configure binuitils: Check if AR is usable for LTO build 2021-01-11 16:37:13 -08:00
configure.ac binuitils: Check if AR is usable for LTO build 2021-01-11 16:37:13 -08:00
COPYING
COPYING3
COPYING3.LIB
COPYING.LIB
COPYING.LIBGLOSS Update the address of the FSF in the copyright notice of files which were using the old address. 2017-12-14 12:48:55 +00:00
COPYING.NEWLIB
depcomp
djunpack.bat
install-sh
libtool.m4 GCC: Check if AR works with --plugin and rc 2021-01-11 16:26:51 -08:00
lt~obsolete.m4
ltgcc.m4
ltmain.sh
ltoptions.m4
ltsugar.m4
ltversion.m4
MAINTAINERS Move gdbserver to top level 2020-02-07 08:42:25 -07:00
Makefile.def ld: depend on libctf 2021-01-27 11:04:12 +00:00
Makefile.in ld: depend on libctf 2021-01-27 11:04:12 +00:00
Makefile.tpl Support the PGO build for binutils+gdb 2021-01-09 06:51:51 -08:00
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 src-release: fix indentation 2021-01-12 18:19:20 -05:00
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.