GDB currently does not promptly quit after receiving a SIGTERM while no
proper target is active. This is because in handle_sigterm we currently
look at target_can_async_p to determine whether to asynchronously quit
GDB using an async signal handler or to asynchronously quit using the
quit flag. However, target_can_async_p is always false under the dummy
target, so under this target we always use the quit flag and not the
async signal handler to signal that GDB should quit. So GDB won't quit
until a code path that checks the quit flag is executed.
To fix this issue, this patch makes the SIGTERM handler no longer
inspect target_can_async_p, and instead makes the handler
unconditionally set the quit flag _and_ mark the corresponding async
signal handler, so that if the target is async (or if it's the dummy
target) then we will likely quit through the async signal handler, and
if it's not async then we will likely quit through the quit flag. This
redundant approach is similar to how we handle SIGINT.
gdb/ChangeLog:
* event-top.c (handle_sigterm): Don't inspect
target_can_async_p. Always set the quit flag and always mark
the async signal handler.
gdb/testsuite/ChangeLog:
* gdb.base/gdb-sigterm-2.exp: New test.
We don't use PTRACE_PEEKUSR/PTRACE_POKEUSR on aarch64-linux, so don't
need to set srv_linux_usrregs. This patch removes that line.
gdb/gdbserver:
2015-07-27 Yao Qi <yao.qi@linaro.org>
* configure.srv (case aarch64*-*-linux*): Don't set
srv_linux_usrregs.
I happen to see REMOTE_EXAMPLES isn't used anywhere, so this patch
removes it.
REMOTE_EXAMPLES was added in the following commit in 1991,
commit 86bbb439c8
Author: John Gilmore <gnu@cygnus>
Date: Fri May 3 19:57:13 1991 +0000
There should be a Makefile in the cvs main directory, configured
for "./config.gdb none", so that things like "make tags" and "make tar"
will work.
and it was used like:
TARFILES = ${TAGFILES_MAINDIR} ${OTHERS} ${REMOTE_EXAMPLES}
However TARFILES was removed by the change latter in 1994,
Tue Aug 16 15:24:03 1994 Jim Kingdon (kingdon@lioth.cygnus.com)
* symtab.c (decode_line_1): If funfirstline and we get a
non-LOC_BLOCK symbol (e.g. variable or type), then error().
* Makefile.in (TARFILES, NONSRC, SFILES_STAND, SFILES_KGDB):
Remove; unused.
Since then, REMOTE_EXAMPLES is not used any more.
gdb:
2015-07-27 Yao Qi <yao.qi@linaro.org>
* Makefile.in (REMOTE_EXAMPLES): Remove it.
S-records tests don't work with -fno-plt. This path appends $PLT_CFLAGS
to CC and CXX for S-records tests.
* ld-srec/srec.exp (CC): Save and restore. Append $PLT_CFLAGS.
(CXX): Likewise.
Some linker shard library tests without PIC expect PLT. This patch
passes $PLT_CFLAGS to ld_compile.
* ld-shared/shared.exp: Pass $PLT_CFLAGS to ld_compile.
NOCROSSREFS tests don't work with -fno-plt. This path appends
$PLT_CFLAGS to CC for NOCROSSREFS tests.
* ld-scripts/crossref.exp (CC): Save and restore. Append
$PLT_CFLAGS.
Some x86 linker tests expect PLT. This patch adds $PLT_CFLAGS to -fPIC
for run_cc_link_tests.
* ld-i386/i386.exp (run_cc_link_tests): Add $PLT_CFLAGS to
-fPIC if needed.
* ld-x86-64/mpx.exp (run_cc_link_tests): Likewise.
* ld-x86-64/x86-64.exp (run_cc_link_tests): Likewise.
Some linker visibility tests without PIC expect PLT. This patch passes
$PLT_CFLAGS to ld_compile.
* ld-elfvsb/elfvsb.exp (visibility_run): Pass $PLT_CFLAGS to
ld_compile.
Some linker symbol version tests without PIC expect PLT. This patch
adds $PLT_CFLAGS to CFLAGS.
* ld-elfvers/vers.exp (build_vers_lib_no_pic): Pass $PLT_CFLAGS
to build_binary.
GCC 6 supports -fno-plt. But some linker tests expect PLT. This patch
defines PLT_CFLAGS to "-fplt" if target compiler supports it.
* config/default.exp (PLT_CFLAGS): New.
Emit *GLOB_DAT instead of *RELATIVE relocs for protected data
in shared objects.
This is needed for the fix of glibc bug 17711:
https://sourceware.org/bugzilla/show_bug.cgi?id=17711
bfd:
PR ld/18705
* elfnn-aarch64.c (elf_backend_extern_protected_data): Define.
ld/testsuite:
PR ld/18705
* ld-aarch64/protected-data.d: New.
* ld-aarch64/protected-data.s: New.
* ld-aarch64/aarch64-elf.exp: Add new test.
Emit *GLOB_DAT instead of *RELATIVE relocs for protected data
in shared objects.
This is needed for the fix of glibc bug 17711:
https://sourceware.org/bugzilla/show_bug.cgi?id=17711
bfd:
PR ld/18705
* elf32-arm.c (elf_backend_extern_protected_data): Define.
ld/testsuite:
PR ld/18705
* ld-arm/protected-data.d: New.
* ld-arm/protected-data.s: New.
* ld-arm/arm-elf.exp: Add new test.
run_host_cmd_yesno should set errcnt and warncnt to 0. Otherwise, they
may leak to the next run.
* lib/ld-lib.exp (run_host_cmd_yesno): Set errcnt and warncnt
to 0.
When using GDB to debug an RX target using the GDB remote protocol,
using a Renesas supplied debug agent, I encountered the following
assertion error:
thread.c:85: internal-error: inferior_thread: Assertion `tp' failed.
A problem internal to GDB has been detected,
further debugging may prove unreliable.
Create a core file of GDB? (y or n) n
Command aborted.
This assertion error occurs due to the fact that the value associated
with inferior_ptid is not on the thread list.
The remote debug output (obtained with "set debug remote 1") is fairly
short, so I will include it up to the point where things go wrong -
which is somewhat before the assertion failure:
(gdb) target remote coyote.lan:61234
Remote debugging using coyote.lan:61234
Sending packet: $qSupported:multiprocess+;swbreak+;hwbreak+;qRelocInsn+#c9...Ack
Packet received: PacketSize=c00;qXfer:memory-map:read-;qXfer:features:read-;QStartNoAckMode+;multiprocess+;QNonStop+
Packet qSupported (supported-packets) is supported
Sending packet: $QStartNoAckMode#b0...Ack
Packet received: OK
Sending packet: $Hgp0.0#ad...Packet received: OK
Sending packet: $QNonStop:0#8c...Packet received: OK
Sending packet: $qTStatus#49...Packet received:
Packet qTStatus (trace-status) is NOT supported
Sending packet: $?#3f...Packet received: S02
Sending packet: $qfThreadInfo#bb...Packet received: m1
Sending packet: $qsThreadInfo#c8...Packet received: l
Sending packet: $qAttached:a410#bf...Packet received: 0
Packet qAttached (query-attached) is supported
Sending packet: $Hc-1#09...Packet received: OK
Sending packet: $qC#b4...Packet received: QC not supported
Above is the trace starting from the invocation of "target remote"
through the call of get_current_thread() in remote_start_remote().
Below, I've pasted this line of code along with additional lines of
context. The test following the call is especially important to
understanding both the problem and my patch.
/* We have thread information; select the thread the target
says should be current. If we're reconnecting to a
multi-threaded program, this will ideally be the thread
that last reported an event before GDB disconnected. */
inferior_ptid = get_current_thread (wait_status);
if (ptid_equal (inferior_ptid, null_ptid))
{
/* Odd... The target was able to list threads, but not
tell us which thread was current (no "thread"
register in T stop reply?). Just pick the first
thread in the thread list then. */
inferior_ptid = thread_list->ptid;
}
}
Prior to getting to the code pasted above, remote_start_remote()
made a call to target_update_thread_list(). This corresponds to the
following lines from the above trace:
Sending packet: $qfThreadInfo#bb...Packet received: m1
Sending packet: $qsThreadInfo#c8...Packet received: l
Sending packet: $qAttached:a410#bf...Packet received: 0
Packet qAttached (query-attached) is supported
Once target_update_thread_list has completed, the thread list
contains a single entry: {pid = 42000, lwp = 1, tid = 0}.
remote_start_remote() then makes a call to set_continue_thread(),
accounting for this line of the trace:
Sending packet: $Hc-1#09...Packet received: OK
Finally, the call to get_current_thread() is responsible for the last
line of the trace that I provided above:
Sending packet: $qC#b4...Packet received: QC not supported
get_current_thread() calls stop_reply_extract_thread() with the wait
status. This returns null_ptid.
get_current_thread() then calls remote_current_thread with a null
inferior_ptid. After the calls to putpkt() and getpkt(), rs->buf[0]
is 'Q', so read_ptid() is called and its result is returned.
The buffer passed to read_ptid() is " not supported". read_ptid ultimately
returns a ptid of {pid = 4200, lwp = 0, tid = 0}.
However, this thread is not on the thread list. As noted earlier, the
call to target_update_thread_list() had placed {pid = 42000, lwp = 1,
tid = 0} on the list. This is the only thread in the list.
When these calls ultimately return to remote_start_remote(),
inferior_ptid gets set to {pid = 4200, lwp = 0, tid = 0}, which
(again) is not on the thread list.
It appears to me that the string " not supported" is coming from the
debug agent. If so, it should be fixed, but I don't see a reason to
not consult the thread list in order to place a valid thread id in
inferior_ptid.
This (consultation of the thread list) is what is done when
inferior_ptid is null_ptid:
if (ptid_equal (inferior_ptid, null_ptid))
{
/* Odd... The target was able to list threads, but not
tell us which thread was current (no "thread"
register in T stop reply?). Just pick the first
thread in the thread list then. */
inferior_ptid = thread_list->ptid;
}
My patch causes a null inferior_ptid to be returned by read_ptid when
no thread id is found in the response from the debug agent. This
return value ends up being returned by remote_current_thread() and
then by get_current_thread. The assignment then places this null
value into inferior_ptid. That, in turn, allows the ptid_equal test
(noted above) to fetch a valid thread from the thread list. I no
longer see the assertion failure due a good value (which is on the
thread list) being placed in inferior_ptid.
This patch also adds two log warnings that may be output when "set
debug remote 1" is used. When running against the Renesas debug agent
mentioned earlier, this is the relevant portion of the log output:
Sending packet: $qC#b4...Packet received: QC not supported
warning: garbage in qC reply
warning: couldn't determine remote current thread; picking first in list.
gdb/ChangeLog:
* remote.c (read_ptid): Return null_ptid when no thread id
is found.
(remote_current_thread): Add log warning for malformed
qC reply.
(remote_start_remote): Add log warning when current thread
not found.
This reverts commit b558ff043d.
This reverts commit 4a11f20659.
The initial import commit failed to retain local changes made to
readline's configure.in (and the commit message erroneously stated that
there were no local changes that needed to be reapplied). Also the
import caused a couple of build errors and a scattering of testsuite
regressions throughout many arches. It's probably better to start over
with this import, hopefully more carefully next time.
Regressions, e.g.,
http://gdb-build.sergiodj.net/builders/Fedora-x86_64-m32/builds/1501
gdb/testsuite/ChangeLog:
Revert:
* Makefile.in (check/%.exp): Pass directory for GDB_PARALLEL.
(workers/%.worker, build-perf): New rule.
(GDB_PERFTEST_MODE): New variable.
(check-perf): Use it.
(clean): Clean up gdb.perf parallel build subdirs.
* lib/build-piece.exp: New file.
* lib/cache.exp (gdb_do_cache): Include $GDB_PARALLEL in path name.
* lib/gdb.exp (standard_output_file): Include $GDB_PARALLEL in path
name.
(standard_temp_file): Ditto.
(GDB_PARALLEL handling): Make outputs,temp,cache directories as subdirs
of $GDB_PARALLEL.
Since the sync to version 7.0-alpho, readline now by default builds
(unused) shared libraries alongside static libraries, whereas before it
only built static libraries. A couple of GDB buildbots were not happy
with this change:
http://gdb-build.sergiodj.net/builders/AIX-POWER7-plain/builds/240http://gdb-build.sergiodj.net/builders/Fedora-i686/builds/1518
To get these buildbots building again, this patch alters readline's
configure.ac file to not build shared libraries by default, as was the
case with readline 6.2. A more permanent fix may be to alter the
top-level Makefile.def to pass --disable-shared to readline, or to
investigate why these building these shared libraries are giving the
buildbots trouble. (I think the proximate reason why the i686 buildbot
fails is because it passes CFLAGS=-m32 instead of CC="gcc -m32" to the
top-level configure script, and readline's linker commands don't inherit
CFLAGS. Not sure about the AIX failure.)
readline/ChangeLog.gdb:
* configure.ac: Default opt_shared_libs to no.
* configure: Regenerate.
Missing symbol version section is a run-time problem only if it will
be referenced dynamically at run-time. We should skip the check for
locally defined symbol, which isn't referenced by shared library, when
linking executable.
bfd/
PR ld/18718
* elflink.c (elf_link_output_extsym): Check symbol version
section check only if not linking executable, the symbol is
referenced by shared library or not locally defined.
ld/testsuite/
PR ld/18718
* ld-elf/pr18718.c: New file.
* ld-elf/shared.exp: Run tests for PR ld/18718.
This patch syncs our upstream copy of readline from version 6.2 to the
latest version, 7.0 alpha (released July 10 2015).
I essentially copied what was done the last time readline was synced,
when Jan updated to readline 6.2 in 2011:
http://sourceware.org/ml/gdb-patches/2011-05/msg00003.html
Procedure:
1. I extracted the readline-7.0-alpha tarball on top of readline/.
2. I deleted all the new files under doc/ that were deliberately omitted
before.
3. I regenerated readline/configure and readline/examples/rlfe/configure
using autoconf 2.64. No other configure files need regenerating.
4. I updated the function gdb_printable_part in completer.c with a
trivial change made to the readline function it is based off of,
printable_part in readline/complete.c. There is more work to be done in
completer.c to sync it with readline/complete.c, but it is non-trivial
and should probably be done separately anyway.
Local patches that had to be reapplied:
None. readline 7.0 alpha contains all of our local readline
patches.
New files in readline/:
colors.{c,h}
examples/{hist_erasedups,hist_purgecmd,rl-callbacktest,rlbasic}.c
parse-colors.{c,h}
readline.pc.in
configure.ac
Deleted files in readline/:
configure.in
Regressions:
After the sync there is one testsuite regression, the test
"signal SIGINT" in gdb.gdb/selftest.exp which now FAILs. Previously,
the readline 6.2 SIGINT handler would temporarily reinstall the
underlying application's SIGINT handler and immediately re-raise SIGINT
so that the orginal handler gets invoked. But now (since readline 6.3)
its SIGINT handler does not re-raise SIGINT or directly invoke the
original handler; it now sets a flag marking that SIGINT was raised, and
waits until readline explicitly has control to call the application's
SIGINT handler. Anyway, because SIGINT is no longer re-raised from
within readline's SIGINT handler, doing "signal SIGINT" with a stopped
inferior gdb process will no longer resume and then immediately stop the
process (since there is no 2nd SIGINT to immediately catch). Instead,
the inferior gdb process will now just print "Quit" and continue to run.
So with this commit, this particular test case is adjusted to reflect
this change in behavior (we now have to send a 2nd SIGINT manually to
stop it).
Aside from this one testsuite regression, I personally noticed no
regression in user-visible behavior. Though I only tested on x86_64
and on i686 Debian Stretch.
Getting this kind of change in at the start of the GDB 7.11 development
cycle will allow us to get a lot of passive testing from developers and
from bleeding-edge users.
readline/ChangeLog.gdb:
Import readline 7.0 alpha
* configure: Regenerate.
* examples/rlfe/configure: Regenerate.
gdb/ChangeLog:
* completer.c (gdb_printable_part): Sync with readline function
it is based off of.
gdb/testsuite/ChangeLog:
* gdb.gdb/selftest.exp (test_with_self): Update test to now
expect the GDB inferior to no longer immediately stop after
being resumed with "signal SIGINT".
For selected targets. The testcase reveals a number of targets that
still need fixing.
bfd/
* elf32-arm.c (elf32_arm_final_link_relocate): Use SYMBOLIC_BIND to
check if a symbol should be bound symbolically.
* elf32-hppa.c (elf32_hppa_check_relocs,
elf32_hppa_adjust_dynamic_symbol, elf32_hppa_relocate_section,
elf32_hppa_finish_dynamic_symbol): Likewise.
* elf32-m68k.c (elf_m68k_check_relocs,
elf_m68k_relocate_section): Likewise.
* elf32-nios2.c (nios2_elf32_relocate_section,
nios2_elf32_check_relocs, allocate_dynrelocs): Likewise.
* elf32-tic6x.c (elf32_tic6x_finish_dynamic_symbol,
elf32_tic6x_relocate_section): Likewise.
ld/testsuite/
* ld-elf/symbolic-func.s,
* ld-elf/symbolic-func.r: New test.
* ld-elf/elf.exp: Run it.
I think I lost a patch along the way, because I remember needing
something like this, but the reverted patch isn't the right way to
do this. Removing ...
gdb/testsuite/ChangeLog:
* gdb.perf/lib/perftest/measure.py (MeasurementCpuTime::stop): Print
result.
(MeasurementWallTime::stop): Ditto.
(MeasurementVmSizeTime::stop): Ditto.
These testcases are mocks of real programs.
GDB doesn't care what the programs do, they just have to look
and/or behave like the real program.
These testcases exercise gdb when debugging really large programs.
E.g., gmonster-1 has 10,000 CUs, and gmonster-2 has 1000 shared libs
(which is actually a little small, 5000 would be more accurate).
gdb/testsuite/ChangeLog:
* gdb.perf/lib/perftest/utils.py: New file.
* gdb.perf/gm-hello.cc: New file.
* gdb.perf/gm-pervasive-typedef.cc: New file.
* gdb.perf/gm-pervasive-typedef.h: New file.
* gdb.perf/gm-std.cc: New file.
* gdb.perf/gm-std.h: New file.
* gdb.perf/gm-use-cerr.cc: New file.
* gdb.perf/gm-utils.h: New file.
* gdb.perf/gmonster-null-lookup.py: New file.
* gdb.perf/gmonster-pervasive-typedef.py: New file.
* gdb.perf/gmonster-print-cerr.py: New file.
* gdb.perf/gmonster-ptype-string.py: New file.
* gdb.perf/gmonster-runto-main.py: New file.
* gdb.perf/gmonster-select-file.py: New file.
* gdb.perf/gmonster1-null-lookup.exp: New file.
* gdb.perf/gmonster1-pervasive-typedef.exp: New file.
* gdb.perf/gmonster1-print-cerr.exp: New file.
* gdb.perf/gmonster1-ptype-string.exp: New file.
* gdb.perf/gmonster1-runto-main.exp: New file.
* gdb.perf/gmonster1-select-file.exp: New file.
* gdb.perf/gmonster1.cc: New file.
* gdb.perf/gmonster1.exp: New file.
* gdb.perf/gmonster2-null-lookup.exp: New file.
* gdb.perf/gmonster2-pervasive-typedef.exp: New file.
* gdb.perf/gmonster2-print-cerr.exp: New file.
* gdb.perf/gmonster2-ptype-string.exp: New file.
* gdb.perf/gmonster2-runto-main.exp: New file.
* gdb.perf/gmonster2-select-file.exp: New file.
* gdb.perf/gmonster2.cc: New file.
* gdb.perf/gmonster2.exp: New file.
gdb/testsuite/ChangeLog:
* gdb.perf/README: New file.
* lib/perftest.exp (tcl_string_list_to_python_list): New function.
* lib/gen-perf-test.exp: New file.
gdb/testsuite/ChangeLog:
* gdb.base/watchpoint.exp (test_complex_watchpoint): Remove
compiler_info references.
* gdb.cp/temargs.exp: Ditto.
* lib/gdb.exp: Unset compiler_info instead of setting to "unknown".
(get_compiler_info): Early exit if already computed. Set compiler_info
to "unknown" if there was a problem.
(test_compiler_info): Add function comment. Call get_compiler_info.
gdb/testsuite/ChangeLog:
* Makefile.in (check/%.exp): Pass directory for GDB_PARALLEL.
(workers/%.worker, build-perf): New rule.
(GDB_PERFTEST_MODE): New variable.
(check-perf): Use it.
(clean): Clean up gdb.perf parallel build subdirs.
* lib/build-piece.exp: New file.
* lib/cache.exp (gdb_do_cache): Include $GDB_PARALLEL in path name.
* lib/gdb.exp (standard_output_file): Include $GDB_PARALLEL in path
name.
(standard_temp_file): Ditto.
(GDB_PARALLEL handling): Make outputs,temp,cache directories as subdirs
of $GDB_PARALLEL.
The gdb_skip_xml_test procedure explicitly says that it cannot be
invoked when GDB is running. However, the testcase for "catch
syscall" is wrongly doing that, which is causing a failure on
native-extended-gdbserver tests:
new FAIL: gdb.base/catch-syscall.exp: set tdesc filename /home/gdb-buildbot/fedora-x86-64-3/fedora-x86-64-native-extended-gdbserver-m32/build/gdb/testsuite/outputs/gdb.base/catch-syscall/trivial.xml (got interactive prompt)
This obvious commit fixes this, by calling gdb_exit before gdb_skip_xml_test.
Checked in as obvious.
gdb/testsuite/ChangeLog
2015-07-24 Sergio Durigan Junior <sergiodj@redhat.com>
* gdb.base/catch-syscall.exp: Call gdb_exit before
gdb_skip_xml_test.
The buildbot noticed that the enum __ptrace_request series broke the
s390 GNU/Linux build:
../../binutils-gdb/gdb/s390-linux-nat.c: In function 'fetch_regs':
../../binutils-gdb/gdb/s390-linux-nat.c:226:54: error: macro "ptrace" requires 4 arguments, but only 3 given
if (ptrace (PTRACE_PEEKUSR_AREA, tid, (long) &parea) < 0)
^
../../binutils-gdb/gdb/s390-linux-nat.c: In function 'store_regs':
../../binutils-gdb/gdb/s390-linux-nat.c:243:54: error: macro "ptrace" requires 4 arguments, but only 3 given
if (ptrace (PTRACE_PEEKUSR_AREA, tid, (long) &parea) < 0)
^
Fix this the same way it's handled everywhere else -- just pass 0 as
forth argument, which also handles non-varargs ptrace prototypes in
non-glibc libcs, e.g., Bionic (if it ever gets a s390 port...).
gdb/ChangeLog:
2015-07-24 Pedro Alves <palves@redhat.com>
* s390-linux-nat.c (fetch_regs, store_regs, fetch_fpregs)
(s390_stopped_by_watchpoint, s390_prepare_to_resume): Pass 0 as
forth argument to ptrace PTRACE_PEEKUSR_AREA/PTRACE_POKEUSR_AREA.
I have patches that:
1 - make the CLI print stop info from a normal_stop observer, like MI
does.
2 - happen to change the order in which the Python and CLI/TUI
normal_stop observers are installed.
With those in place, py-events.exp regresses like shown below [1],
because the Python stop events are output before CLI prints stop info,
instead of after, and the test doesn't expect that.
With the same Python hooks, the order in which MI and Python events is
emited today is already undefined, because MI also uses the
normal_stop observer for output. I see no reason that we should in
general define the order observers, interpreters and scripting
languages get their turn at being notified of these events. So this
patch makes the test cope with Python->CLI output order too.
Tested on x86_64 Fedora 20.
gdb/testsuite/
2015-07-24 Pedro Alves <palves@redhat.com>
* gdb.python/py-events.exp: Accept output between the stop event
and the prompt.
* gdb.python/py-evsignal.exp: Likewise.
* gdb.python/py-evthreads.exp: Likewise.
[1] - The regressions in question look like:
Before said patches:
(gdb) continue
Continuing.
event type: continue
Breakpoint 2, first () at /home/pedro/gdb/mygit/build/../src/gdb/testsuite/gdb.python/py-events.c:30
30 for (i = 0; i < 2; i++)
event type: stop
event type: stop
stop reason: breakpoint
first breakpoint number: 2
breakpoint number: 2
breakpoint number: 3
all threads stopped
(gdb) PASS: gdb.python/py-events.exp: continue
After said patches:
(gdb) continue
Continuing.
event type: continue
event type: stop
event type: stop
stop reason: breakpoint
first breakpoint number: 2
breakpoint number: 2
breakpoint number: 3
all threads stopped
Breakpoint 2, first () at /home/pedro/gdb/mygit/build/../src/gdb/testsuite/gdb.python/py-events.c:30
30 for (i = 0; i < 2; i++)
(gdb) FAIL: gdb.python/py-events.exp: continue
If a non-leader thread exits the process while all other threads are
ptrace-stopped, native gdb fails an assertion. The test added by this
commit catches it:
/home/pedro/gdb/mygit/build/../src/gdb/linux-nat.c:3198: internal-error: linux_nat_filter_event: Assertion `lp->resumed' failed.
A problem internal to GDB has been detected,
further debugging may prove unreliable.
Quit this debugging session? (y or n)
FAIL: gdb.threads/non-leader-exit-process.exp: program exits normally (GDB internal error)
The fix is just to remove the assertion.
With that out of the way, neither GDB not GDBserver handle this
perfectly though, so I'm adding a KFAIL:
(gdb) continue
Continuing.
[Thread 0x7ffff7fc0700 (LWP 15350) exited]
No unwaited-for children left.
Couldn't get registers: No such process.
(gdb) KFAIL: gdb.threads/non-ldr-exit.exp: program exits normally (PRMS: gdb/18717)
gdb/ChangeLog:
2015-07-24 Pedro Alves <palves@redhat.com>
PR gdb/18717
* linux-nat.c (linux_nat_filter_event): Don't assert that the lwp
is resumed, and extend the debug log.
gdb/testsuite/ChangeLog:
2015-07-24 Pedro Alves <palves@redhat.com>
PR gdb/18717
* gdb.threads/non-ldr-exit.c: New file.
* gdb.threads/non-ldr-exit.exp: New file.
Ref: https://sourceware.org/ml/gdb-patches/2015-07/msg00629.html
This fixes the bogus command line in the error message shown when the
SHELL environment variable points somewhere that's not something that
resembles a shell:
$ SHELL=/nonexisting gdb /home/pedro/a.out
(gdb) r
Starting program: /home/pedro/a.out
- Cannot exec /home/pedro/a.out -c exec /home/pedro/a.out .
+ Cannot exec /nonexisting -c exec /home/pedro/a.out .
Error: No such file or directory
During startup program exited with code 127.
(gdb)
gdb/ChangeLog:
2015-07-24 Pedro Alves <palves@redhat.com>
* fork-child.c (fork_inferior): Print argv[0] instead of exec_file.
GCC 6 warns:
error: result of ‘63 << 26’ requires 33 bits to represent, but ‘int’ only has 32 bits [-Werror=shift-overflow=]
on 0x3f << 26. This patch adds 'U' suffix to make integer constant
unsigned.
* alpha.c (OP_Jxx): Add 'U' suffix to make it unsigned.
(OP_BSR): Likewise.
(Jxx_FUNC_JMP): Likewise.
(Jxx_FUNC_JSR): Likewise.
(Jxx_FUNC_RET): Likewise.
(Jxx_FUNC_JSR_COROUTINE): Likewise.
(alpha_find_call): Replace 0x3f with 0x3fU.
GCC 6 warns:
error: result of ‘4294967295ll << 32’ requires 65 bits to represent, but ‘long long int’ only has 64 bits [-Werror=shift-overflow=]
on ((((bfd_signed_vma) 0xffffffff) << 32) | 0xffffffff). This patch
replaces it with bfd_signed_vma) 0xffffffffffffffffLL.
* stabs.c (parse_stab_range_type): Use 0xffffffffffffffffLL.
gas * config/tc-rl78.c (rl78_abs_sym): New local variable.
(md_begin): Initialise the new symbol.
(OPIMM): Define the value to be relative to the new symbol and not
the absolute section symbol.
ld * emulparams/elf32rl78.sh (OTHER_SECTIONS): Provide a value for
the _-rl78_abs__ symbol.
tests * gas/all/struct.d: Allow for extra symbols in the output.
* gas/macros/test1.d: Likewise.
* gas/elf/elf.exp: Add an rl78 machine.
* gas/elf/sections2e-rl78: New file.
tests * binutils-all/localize-hidden-1.d: Allow for extra symbols in the
output.
* binutils-all/strip-11.d: Skip for the RL78.
Building in C++ mode issues ~40 warnings like this:
../../src/gdb/linux-nat.c: In function ‘int linux_handle_extended_wait(lwp_info*, int, int)’:
../../src/gdb/linux-nat.c:2016:51: warning: invalid conversion from ‘int’ to ‘__ptrace_request’ [-fpermissive]
ptrace (PTRACE_GETEVENTMSG, pid, 0, &new_pid);
The issue is that in glibc, ptrace's first parameter is an enum.
That's not a problem if we pick the PTRACE_XXX requests from
sys/ptrace.h, as those will be values of the corresponding enum.
However, we have fallback definitions for PTRACE_XXX symbols when the
system headers miss them (such as PTRACE_GETEVENTMSG above), and those
are plain integer constants. E.g., nat/linux-ptrace.h:
#define PTRACE_GETEVENTMSG 0x4201
One idea would be to fix this by defining those fallbacks like:
-#define PTRACE_GETEVENTMSG 0x4201
+#define PTRACE_GETEVENTMSG ((enum __ptrace_request) 0x4201)
However, while glibc's ptrace uses enum __ptrace_request for first
parameter:
extern long int ptrace (enum __ptrace_request __request, ...) __THROW;
other libc's, like e.g., Android's bionic do not -- in that case, the
first parameter is int:
long ptrace(int request, pid_t pid, void * addr, void * data);
So the fix I came up is to make configure/ptrace.m4 also detect the
type of the ptrace's first parameter and defin PTRACE_TYPE_ARG1, as
already does the for parameters 3-4, and then simply wrap ptrace with
a macro that casts the first argument to the detected type. (I'm
leaving adding a nicer wrapper for when we drop building in C).
While this adds the wrapper, GNU/Linux files won't use it until the
next patch, which makes all native GNU/Linux files include
gdb_ptrace.h.
gdb/ChangeLog:
2015-07-24 Pedro Alves <palves@redhat.com>
* ptrace.m4 (ptrace tests): Test in C++ mode. Try with 'enum
__ptrace_request as first parameter type instead of int.
(PTRACE_TYPE_ARG1): Define.
* nat/gdb_ptrace.h [!PTRACE_TYPE_ARG5] (ptrace): Define as wrapper
that casts first argument to PTRACE_TYPE_ARG1.
* config.in: Regenerate.
* configure: Regenerate.
gdb/gdbserver/ChangeLog:
2015-07-24 Pedro Alves <palves@redhat.com>
* config.in: Regenerate.
* configure: Regenerate.
