Binutils with MCST patches
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Pedro Alves 4eec2deb06 Crash on thread id wrap around
On GNU/Linux, if the target reuses the TID of a thread that GDB still
has in its list marked as THREAD_EXITED, GDB crashes, like:

 (gdb) continue
 Continuing.
 src/gdb/thread.c:789: internal-error: set_running: Assertion `tp->state != THREAD_EXITED' failed.
 A problem internal to GDB has been detected,
 further debugging may prove unreliable.
 Quit this debugging session? (y or n) FAIL: gdb.threads/tid-reuse.exp: continue to breakpoint: after_reuse_time (GDB internal error)

Here:

 (top-gdb) bt
 #0  internal_error (file=0x953dd8 "src/gdb/thread.c", line=789, fmt=0x953da0 "%s: Assertion `%s' failed.")
     at src/gdb/common/errors.c:54
 #1  0x0000000000638514 in set_running (ptid=..., running=1) at src/gdb/thread.c:789
 #2  0x00000000004bda42 in linux_handle_extended_wait (lp=0x16f5760, status=0, stopping=0) at src/gdb/linux-nat.c:2114
 #3  0x00000000004bfa24 in linux_nat_filter_event (lwpid=20570, status=198015) at src/gdb/linux-nat.c:3127
 #4  0x00000000004c070e in linux_nat_wait_1 (ops=0xe193d0, ptid=..., ourstatus=0x7fffffffd2c0, target_options=1) at src/gdb/linux-nat.c:3478
 #5  0x00000000004c1015 in linux_nat_wait (ops=0xe193d0, ptid=..., ourstatus=0x7fffffffd2c0, target_options=1) at src/gdb/linux-nat.c:3722
 #6  0x00000000004c92d2 in thread_db_wait (ops=0xd80b60 <thread_db_ops>, ptid=..., ourstatus=0x7fffffffd2c0, options=1)
     at src/gdb/linux-thread-db.c:1525
 #7  0x000000000066db43 in delegate_wait (self=0xd80b60 <thread_db_ops>, arg1=..., arg2=0x7fffffffd2c0, arg3=1) at src/gdb/target-delegates.c:116
 #8  0x000000000067e54b in target_wait (ptid=..., status=0x7fffffffd2c0, options=1) at src/gdb/target.c:2206
 #9  0x0000000000625111 in fetch_inferior_event (client_data=0x0) at src/gdb/infrun.c:3275
 #10 0x0000000000648a3b in inferior_event_handler (event_type=INF_REG_EVENT, client_data=0x0) at src/gdb/inf-loop.c:56
 #11 0x00000000004c2ecb in handle_target_event (error=0, client_data=0x0) at src/gdb/linux-nat.c:4655

I managed to come up with a test that reliably reproduces this.  It
spawns enough threads for the pid number space to wrap around, so
could potentially take a while.  On my box that's 4 seconds; on
gcc110, a PPC box which has max_pid set to 65536, it's over 10
seconds.  So I made the test compute how long that would take, and cap
the time waited if it would be unreasonably long.

Tested on x86_64 Fedora 20.

gdb/ChangeLog:
2015-04-01  Pedro Alves  <palves@redhat.com>

	* linux-thread-db.c (record_thread): Readd the thread to gdb's
	list if it was marked exited.

gdb/testsuite/ChangeLog:
2015-04-01  Pedro Alves  <palves@redhat.com>

	* gdb.threads/tid-reuse.c: New file.
	* gdb.threads/tid-reuse.exp: New file.
2015-04-01 13:38:06 +01:00
bfd [AArch64] Workaround for Cortex A53 erratum 843419 2015-04-01 13:16:38 +01:00
binutils Regenerate configure in bfd/binutils/gas/gdb 2015-04-01 04:55:48 -07:00
config Unset zlibdir/zlibinc only for --with-system-zlib 2015-04-01 04:51:55 -07:00
cpu or1k: add missing l.msync, l.psync and l.psync instructions. 2014-07-20 20:26:09 +03:00
elfcpp [gold] Recognize DWARF5/GCC5 DW_LANG_Fortran03 and DW_LANG_Fortran08. 2015-02-17 08:08:24 +01:00
etc PR external/{16327,16328}: Remove etc/configure.texi and etc/standards.texi. 2014-06-27 11:33:25 +02:00
gas Regenerate configure in bfd/binutils/gas/gdb 2015-04-01 04:55:48 -07:00
gdb Crash on thread id wrap around 2015-04-01 13:38:06 +01:00
gold Support AARCH64_TLSLD_ADD_DTPREL_* relocations. 2015-03-30 14:11:48 -07:00
gprof Regenerate Makeile.in file for copyright update 2015-01-02 22:27:27 +10:30
include sim: ft32: new port 2015-03-28 02:12:33 -04:00
intl merge from gcc 2010-09-27 21:01:18 +00:00
ld [AArch64] Workaround for Cortex A53 erratum 843419 2015-04-01 13:16:38 +01:00
libdecnumber Another part of fixing "make TAGS". 2015-01-22 21:07:31 +02:00
libiberty strerror.c: Do not declare sys_nerr or sys_errlist if already macros 2015-01-19 16:29:07 +01:00
opcodes opcodes: d10v: fix old style prototype 2015-03-30 02:20:22 -04:00
readline Fix executable indicator in file name completion on Windows. 2014-12-30 21:14:25 +02:00
sim sim: m32c: enable warnings & clean up a bunch 2015-04-01 02:22:58 -04:00
texinfo * texinfo/texinfo.tex: Update to version 2009-03-28.05. 2009-04-21 12:36:46 +00:00
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
COPYING
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
COPYING3 * COPYING3: New file. Contains version 3 of the GNU General Public License. 2007-07-17 13:50:23 +00:00
COPYING3.LIB * COPYING3: New file. Contains version 3 of the GNU General Public License. 2007-07-17 13:50:23 +00:00
ChangeLog Add --with-system-zlib to top level configure 2015-04-01 04:57:28 -07:00
MAINTAINERS Update description of ownership of files in include/ 2014-11-04 16:14:14 -08:00
Makefile.def Make all-bfd depend on all-zlib 2015-03-30 10:18:34 -07:00
Makefile.in Make all-bfd depend on all-zlib 2015-03-30 10:18:34 -07:00
Makefile.tpl Update top-level files from GCC trunk 2015-03-16 09:12:37 -07:00
README
README-maintainer-mode Cleanups after the update to Autoconf 2.64, Automake 1.11. 2009-08-22 17:08:11 +00:00
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 Remove freebsd1 from libtool.m4 macros and config.rpath. 2011-02-13 21:00:14 +00:00
config.sub Update config.guess and config.sub to the latest upstream version 2015-03-30 16:28:14 -04:00
configure Add --with-system-zlib to top level configure 2015-04-01 04:57:28 -07:00
configure.ac Add --with-system-zlib to top level configure 2015-04-01 04:57:28 -07:00
depcomp Update from upstream Automake 2014-11-16 13:43:48 +01:00
djunpack.bat * djunpack.bat: Use ".." quoting in Sed command, for the sake of 2009-03-27 13:37:09 +00:00
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
ltgcc.m4 * libtool.m4: Update to libtool 2.2.6. 2008-09-29 15:28:14 +00:00
ltmain.sh PR target/59788 2014-02-06 11:01:57 +01:00
ltoptions.m4 Sync Libtool from GCC. 2010-01-09 21:11:44 +00:00
ltsugar.m4 * libtool.m4: Update to libtool 2.2.6. 2008-09-29 15:28:14 +00:00
ltversion.m4 Sync Libtool from GCC. 2010-01-09 21:11:44 +00:00
lt~obsolete.m4 Sync Libtool from GCC. 2010-01-09 21:11:44 +00:00
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
setup.com 2009-09-01 Tristan Gingold <gingold@adacore.com> 2009-09-01 13:38:26 +00:00
src-release.sh Remove --with-target-subdir=. --disable-multilib 2015-03-31 13:13:13 -07:00
symlink-tree
ylwrap Update from upstream Automake 2014-11-16 13:43:48 +01:00

README

		   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,
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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
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REPORTING BUGS: Again, see gdb/README, binutils/README, etc., for info
on where and how to report problems.