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Pedro Alves 7f8acedeeb gdbserver: track current process as well as current thread
The recent commit 421490af33 ("gdbserver/linux: Access memory even
if threads are running") caused a regression in
gdb.threads/access-mem-running-thread-exit.exp with gdbserver, which I
somehow missed.  Like so:

 (gdb) print global_var
 Cannot access memory at address 0x555555558010
 (gdb) FAIL: gdb.threads/access-mem-running-thread-exit.exp: non-stop: access mem (print global_var after writing, inf=2, iter=1)

The problem starts with GDB telling GDBserver to select a thread, via
the Hg packet, which GDBserver complies with, then that thread exits,
and GDB, without knowing the thread is gone, tries to write to memory,
through the context of the previously selected Hg thread.

GDBserver's GDB-facing memory access routines, gdb_read_memory and
gdb_write_memory, call set_desired_thread to make GDBserver re-select
the thread that GDB has selected with the Hg packet.  Since the thread
is gone, set_desired_thread returns false, and the memory access
fails.

Now, to access memory, it doesn't really matter which thread is
selected.  All we should need is the target process.  Even if the
thread that GDB previously selected is gone, and GDB does not yet know
about that exit, it shouldn't matter, GDBserver should still know
which process that thread belonged to.

Fix this by making GDBserver track the current process separately,
like GDB also does.  Add a new set_desired_process routine that is
similar to set_desired_thread, but just sets the current process,
leaving the current thread as NULL.  Use it in the GDB-facing memory
read and write routines, to avoid failing if the selected thread is
gone, but the process is still around.

Change-Id: I4ff97cb6f42558efbed224b30d5c71f6112d44cd
2022-05-03 15:10:22 +01:00
bfd Add a linker warning when creating potentially dangerous executable segments. Add tests, options to disabke and configure switches to choose defaults. 2022-05-03 11:42:24 +01:00
binutils Add a linker warning when creating potentially dangerous executable segments. Add tests, options to disabke and configure switches to choose defaults. 2022-05-03 11:42:24 +01:00
config Add markers for 2.38 branch 2022-01-22 12:08:55 +00:00
contrib
cpu opcodes: don't assume ELF in riscv, csky, rl78, mep disassemblers 2022-04-30 19:21:11 +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 x86: Disable 2 tests with large memory requirement 2022-04-27 11:51:35 -07:00
gdb Fix gdb.threads/access-mem-running-thread-exit.exp w/ native-extended-gdbserver 2022-05-03 15:10:21 +01:00
gdbserver gdbserver: track current process as well as current thread 2022-05-03 15:10:22 +01:00
gdbsupport gdbsupport/pathstuff.h: #include <array> explicitly for std::array<> 2022-04-25 17:06:09 -07:00
gnulib gnulib: update to bd11400942d6 2022-05-02 10:54:19 -04:00
gold Updated Serbian translations for the bfd, gold, ld and opcodes directories 2022-02-17 15:18:59 +00:00
gprof libtool.m4: fix the NM="/nm/over/here -B/option/with/path" case 2022-03-25 12:02:35 +00:00
gprofng gprofng: assertion in gprofng/src/Expression.cc:139 2022-04-29 14:03:12 -07:00
include Add a linker warning when creating potentially dangerous executable segments. Add tests, options to disabke and configure switches to choose defaults. 2022-05-03 11:42:24 +01:00
intl Regenerate a couple of files 2021-11-15 12:20:12 +10:30
ld Add a linker warning when creating potentially dangerous executable segments. Add tests, options to disabke and configure switches to choose defaults. 2022-05-03 11:42:24 +01:00
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
libiberty gdb: rename floatformats_ia64_quad to floatformats_ieee_quad 2022-04-02 08:36:33 +08:00
opcodes opcodes: don't assume ELF in riscv, csky, rl78, mep disassemblers 2022-04-30 19:21:11 +09:30
readline readline: back-port changes needed to properly detect EOF 2022-04-22 18:46:04 +01:00
sim Fix for v850e divq instruction 2022-04-06 11:10:40 -04:00
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
ar-lib
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
COPYING3
COPYING3.LIB
COPYING.LIB
COPYING.LIBGLOSS
COPYING.NEWLIB
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
lt~obsolete.m4
ltgcc.m4
ltmain.sh
ltoptions.m4
ltsugar.m4
ltversion.m4
MAINTAINERS
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
README
README-maintainer-mode
setup.com
src-release.sh gprofng: a new GNU profiler 2022-03-11 08:58:31 +00:00
symlink-tree
test-driver
ylwrap

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