Christophe Lyon [Fri, 1 Apr 2022 09:22:16 +0000 (10:22 +0100)]
gdb/arm: Add support for multiple stack pointers on Cortex-M
Armv8-M architecture with Security extension features four stack pointers
to handle Secure and Non-secure modes.
This patch adds support to switch between them as needed during
unwinding, and replaces all updates of cache->prev_sp with calls to
arm_cache_set_prev_sp.
Signed-off-by: Torbjörn Svensson <torbjorn.svensson@st.com>
Signed-off-by: Christophe Lyon <christophe.lyon@foss.st.com>
Signed-off-by: Christophe Lyon <christophe.lyon@arm.com>
Christophe Lyon [Fri, 1 Apr 2022 09:22:12 +0000 (10:22 +0100)]
gdb/arm: Introduce arm_cache_init
This patch is a preparation for the rest of the series and adds two
arm_cache_init helper functions. It updates every place that updates
cache->saved_regs to call the helper instead.
Signed-off-by: Torbjörn Svensson <torbjorn.svensson@st.com>
Signed-off-by: Christophe Lyon <christophe.lyon@foss.st.com>
Signed-off-by: Christophe Lyon <christophe.lyon@arm.com>
Christophe Lyon [Fri, 1 Apr 2022 09:22:08 +0000 (10:22 +0100)]
gdb/arm: Define MSP and PSP registers for M-Profile
This patch removes the hardcoded access to PSP in
arm_m_exception_cache() and relies on the definition with the XML
descriptions.
Signed-off-by: Christophe Lyon <christophe.lyon@foss.st.com>
Signed-off-by: Christophe Lyon <christophe.lyon@arm.com>
Christophe Lyon [Fri, 1 Apr 2022 09:21:58 +0000 (10:21 +0100)]
gdb/arm: Fix prologue analysis to support vpush
While working on adding support for Non-secure/Secure modes unwinding,
I noticed that the prologue analysis lacked support for vpush, which
is used for instance in the CMSE stub routine.
This patch updates thumb_analyze_prologue accordingly, adding support
for vpush of D-registers.
Signed-off-by: Christophe Lyon <christophe.lyon@foss.st.com>
Signed-off-by: Christophe Lyon <christophe.lyon@arm.com>
Enze Li [Wed, 27 Apr 2022 13:12:27 +0000 (21:12 +0800)]
gdb/testsuite: fix FAIL in gdb.base/clear_non_user_bp.exp
Tom and Simon feedback that there is a test failing in this commit:
commit
a5c69b1e49bae4d0dcb20f324cebb310c63495c6
Date: Sun Apr 17 15:09:46 2022 +0800
gdb: fix using clear command to delete non-user breakpoints(PR cli/7161)
Then, I reproduced the same fail with Ubuntu 20.04 as Simon said, and I
fixed the nit in this patch. The root of the problem is not correctly
matching the presentation of internal breakpoints.
In addition, as Pedro pointed out, the original testcase is not portable
in some methods, so this patch fixes this issue and some other
improvements.
Tested on x86_64 ubuntu 20.04.4 and openSUSE Tumbleweed(VERSION_ID="
20220425").
Jan Beulich [Wed, 27 Apr 2022 09:08:57 +0000 (11:08 +0200)]
x86: VFPCLASSSH is Evex.LLIG
This also was mistakenly flagged as Evex.128.
Nick Clifton [Wed, 27 Apr 2022 07:35:18 +0000 (08:35 +0100)]
Fix potential buffer overruns when creating DLLs.
PR 29006
* pe-dll.c (make_head): Use asprintf to allocate and populate a
buffer containing the temporary name.
(make_tail, make_one, make_singleton_name_thunk): Likewise.
(make_import_fixup_mark, make_import_fixup_entry): Likewise.
(make_runtime_pseudo_reloc): Likewise.
(pe_create_runtime_relocator_reference): Likewise.
Alan Modra [Tue, 26 Apr 2022 23:39:41 +0000 (09:09 +0930)]
Revert pr29072 lto test changes
Revert commit
65daf5bed6 testsuite changes in ld-plugin/. -z isn't
supported for non-ELF targets, and isn't needed since we now prune the
exec stack warning (commit
333cd559ba).
PR 29072
Simon Marchi [Fri, 22 Apr 2022 13:16:59 +0000 (09:16 -0400)]
gdb/testsuite: use with_cwd where possible
I learned about with_cwd today. I spotted a few spots that could use
it, to make the code more robust.
Change-Id: Ia23664cb827f25e79d31948e0c006a8dc61c33e1
GDB Administrator [Wed, 27 Apr 2022 00:00:16 +0000 (00:00 +0000)]
Automatic date update in version.in
Carl Love [Tue, 26 Apr 2022 19:23:49 +0000 (19:23 +0000)]
GDB PowerPC record test cases for ISA 2.06 and ISA 3.1
This patch adds PowerPC specific tests to verify recording of various
instructions. The first test case checks the ISA 2.06 lxvd2x instruction.
The second test case tests several of the ISA 3.01 instructions. Specifically,
it checks the word and prefixed instructions and some of the Matrix
Multiply Assist (MMA) instructions.
The patch has been run on both Power 10 and Power 9 to verify the ISA
2.06 test case runs on both platforms without errors. The ISA 3.1 test
runs without errors on Power 10 and is skipped as expected on Power 9.
Carl Love [Tue, 26 Apr 2022 19:23:17 +0000 (19:23 +0000)]
Add recording support for the ISA 3.1 PowerPC instructions.
This patch adds support for the PowerPC ISA 3.1 instructions to the PowerPC
gdb instruction recording routines. Case statement entries are added to a
number of the existing routines for recording the 32-bit word instructions.
A few new functions were added to handle the new word instructions. The 64-bit
prefix instructions are all handled by a set of new routines. The function
ppc_process_prefix_instruction() is the primary function to handle the
prefixed instructions. It calls additional functions to handle specific
sets of prefixed instructions. These new functions are:
ppc_process_record_prefix_vsx_d_form(),
ppc_process_record_prefix_store_vsx_ds_form(),
ppc_process_record_prefix_op34(),
ppc_process_record_prefix_op33(),
ppc_process_record_prefix_op32(),
ppc_process_record_prefix_store(),
ppc_process_record_prefix_op59_XX3(),
ppc_process_record_prefix_op42().
Tom Tromey [Tue, 19 Apr 2022 17:21:35 +0000 (11:21 -0600)]
Handle encoding failures in Windows thread names
Internally at AdaCore, we noticed that the new Windows thread name
code could fail. First, it might return a zero-length string, but in
gdb conventions it should return nullptr instead. Second, an encoding
failure could wind up showing replacement characters to the user; this
is confusing and not useful; it's better to recognize such errors and
simply discard the name. This patch makes both of these changes.
H.J. Lu [Tue, 26 Apr 2022 16:26:36 +0000 (09:26 -0700)]
i386: Pass -z noexecstack to linker tests
PR ld/29072
* testsuite/ld-i386/i386.exp: Pass -z noexecstack to gotpc1
and property-6.
John Baldwin [Tue, 26 Apr 2022 16:13:12 +0000 (09:13 -0700)]
bsd-kvm: Fix build after recent changes to path handling functions.
Convert bsd_kvm_corefile and the local filename in bsd_kvm_open to
std::string rather than simple char * pointers freed by xfree.
Simon Marchi [Tue, 26 Apr 2022 15:37:46 +0000 (11:37 -0400)]
gdb: make some random Python files Python 3-compatible
I noticed that these files failed to format with Black, because they use
print without parenthesis (which isn't Python 3 compatible).
I don't know if these files are still relevant, but the change is
trivial, so here it is.
Change-Id: I116445c2b463486016f824d32effffc915b60766
Carl Love [Tue, 26 Apr 2022 15:00:19 +0000 (15:00 +0000)]
PowerPC: Update expected floating point output for gdb.arch/altivec-regs.exp and gdb.arch/vsx-regs.exp
The format for printing the floating point values was changed by commit:
commit
56262a931b7ca8ee3ec9104bc7e9e0b40cf3d64e
Author: Tom Tromey <tromey@adacore.com>
Date: Thu Feb 17 13:43:59 2022 -0700
Change how "print/x" displays floating-point value
Currently, "print/x" will display a floating-point value by first
casting it to an integer type. This yields weird results like:
(gdb) print/x 1.5
$1 = 0x1
...
Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=16242
The above change results in 417 regression test failures since the expected
Power vector register output no longer match.
This patch updates the expected Altivec floating point register prints to
the hexadecimal format for both big endian and little endian systems. The
patch also fixes a formatting isue with the decimal_vector expected value
assign statements.
The expected VSX vector_register1, vector_register1_vr, vector_register2,
vector_register2_vr variables are updated to include the new float128 entry.
Additionally, the comment in the vsx expect file about the initialization
of the vs registers is updated.
The patch has been tested on Power 10, Power 8 LE and Power 8 BE.
John Baldwin [Tue, 26 Apr 2022 00:06:09 +0000 (17:06 -0700)]
gdbsupport/pathstuff.h: #include <array> explicitly for std::array<>
This fixes build breakage using clang with libc++ on FreeBSD where
std::array<> is not yet declared when used by the path_join variadic
function template.
GDB Administrator [Tue, 26 Apr 2022 00:00:13 +0000 (00:00 +0000)]
Automatic date update in version.in
Tom Tromey [Fri, 22 Apr 2022 17:44:59 +0000 (11:44 -0600)]
Do not put linkage names into .gdb_index
This changes the .gdb_index writer to skip linkage names. This was
always done historically (though somewhat implicitly).
Nick Clifton [Mon, 25 Apr 2022 11:51:31 +0000 (12:51 +0100)]
Emit a note warning the user that creating an executable stack because of a missing .note.GNU-stack section is deprecated.
PR 29072
bfd * elflink.c (bfd_elf_size_dynamic_sections): Display a note to the
user that the current ehaviour of creating an executable stack
because of a missing .note.GNU-stack section is deprecated and
will be changed in a future release.
binutils* testsuite/lib/binutils-common.exp (prune_warnings_extra): Filter
out notes about the executable stacjk behaviour beign deprecated.
ld * testsuite/ld-elf/pr29072.b.warn: Update to include the note
about the linker's behaviour being depreccated.
rupothar [Fri, 8 Apr 2022 10:35:41 +0000 (16:05 +0530)]
gdb/fortran: Support for assumed rank zero
If a variable is passed to function in FORTRAN as an argument the
variable is treated as an array with rank zero. GDB currently does
not support the case for assumed rank 0. This patch provides support
for assumed rank 0 and updates the testcase as well.
Without patch:
Breakpoint 1, arank::sub1 (a=<error reading variable:
failed to resolve dynamic array rank>) at assumedrank.f90:11
11 PRINT *, RANK(a)
(gdb) p a
failed to resolve dynamic array rank
(gdb) p rank(a)
failed to resolve dynamic array rank
With patch:
Breakpoint 1, arank::sub1 (a=0) at assumedrank.f90:11
11 PRINT *, RANK(a)
(gdb) p a
$1 = 0
(gdb) p rank(a)
$2 = 0
Lancelot SIX [Tue, 19 Apr 2022 22:13:29 +0000 (23:13 +0100)]
gdb/infrun: assert !step_over_info_valid_p in restart_threads
While working in gdb/infrun.c:restart_threads, I was wondering what are
the preconditions to call the function. It seems to me that
!step_over_info_valid_p should be a precondition (i.e. if we are doing
an inline step over breakpoint, we do not want to resume non stepping
threads as one of them might miss the breakpoint which is temporally
disabled).
To convince myself that this is true, I have added an assertion to
enforce this, and got one regression in the testsuite:
FAIL: gdb.base/step-over-syscall.exp: vfork: displaced=off: single step over vfork (GDB internal error)
This call to restart_threads originates from handle_vfork_done which
does not check if a step over is active when restarting other threads:
if (target_is_non_stop_p ())
{
scoped_restore_current_thread restore_thread;
insert_breakpoints ();
restart_threads (event_thread, event_thread->inf);
start_step_over ();
}
In this patch, I propose to:
- Call start_step_over before restart_threads. If a step over is already
in progress (as it is the case in the failing testcase),
start_step_over return immediately, and there is no point in restarting
all threads just to stop them right away for a step over breakpoint.
- Only call restart_threads if no step over is in progress at this
point.
In this patch, I also propose to keep the assertion in restart_threads
to help enforce this precondition, and state it explicitly.
I have also checked all other places which call restart_threads, and
they all seem to check that there is no step over currently active
before doing the call.
As for infrun-related things, I am never completely sure I did not miss
something. So as usual, all feedback and thoughts are very welcome.
Tested on x86_64-linux-gnu.
Change-Id: If5f5f98ec4cf9aaeaabb5e3aa88ae6ffd70d4f37
GDB Administrator [Mon, 25 Apr 2022 00:00:15 +0000 (00:00 +0000)]
Automatic date update in version.in
Andrew Burgess [Sun, 24 Apr 2022 15:39:19 +0000 (08:39 -0700)]
gdb: move setbuf calls out of gdb_readline_no_editing_callback
After this commit:
commit
d08cbc5d3203118da5583296e49273cf82378042
Date: Wed Dec 22 12:57:44 2021 +0000
gdb: unbuffer all input streams when not using readline
Issues were reported with some MS-Windows hosts, see the thread
starting here:
https://sourceware.org/pipermail/gdb-patches/2022-March/187004.html
Filed in bugzilla as: PR mi/29002
The problem seems to be that calling setbuf on terminal file handles
is not always acceptable, see this mail for more details:
https://sourceware.org/pipermail/gdb-patches/2022-April/187310.html
This commit does two things, first moving the setbuf calls out of
gdb_readline_no_editing_callback so that we don't end up calling
setbuf so often.
Then, for MS-Windows hosts, we don't call setbuf for terminals, this
appears to resolve the issues that have been reported.
Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=29002
GDB Administrator [Sun, 24 Apr 2022 00:00:10 +0000 (00:00 +0000)]
Automatic date update in version.in
GDB Administrator [Sat, 23 Apr 2022 00:00:17 +0000 (00:00 +0000)]
Automatic date update in version.in
Simon Marchi [Tue, 12 Apr 2022 02:11:03 +0000 (22:11 -0400)]
gdb: handle_no_resumed: only update thread list of event target
When running:
$ make check TESTS="gdb.multi/multi-re-run.exp" RUNTESTFLAGS="--target_board=native-gdbserver"
I get:
target remote localhost:2347^M
Remote debugging using localhost:2347^M
Reading symbols from /lib64/ld-linux-x86-64.so.2...^M
Reading symbols from /usr/lib/debug//lib/x86_64-linux-gnu/ld-2.31.so...^M
0x00007ffff7fd0100 in _start () from /lib64/ld-linux-x86-64.so.2^M
(gdb) continue^M
Continuing.^M
Cannot execute this command while the target is running.^M
Use the "interrupt" command to stop the target^M
and then try again.^M
(gdb) FAIL: gdb.multi/multi-re-run.exp: re_run_inf=1: iter=1: runto: run to all_started
The test does:
- Connect to a remote target with inferior 2, continue and stop on the
all_started function
- Connect to a separate remote target / GDBserver instance with inferior 1,
continue and (expect to) stop on the all_started function
The failure seen above happens when trying to continue inferior 1.
What happens is:
- GDB tells inferior 1's remote target to continue
- We go into fetch_inferior_event, try to get an event at random from
the targets
- do_target_wait happens to pick inferior 2's target
- That target return TARGET_WAITKIND_NO_RESUMED, which makes sense:
inferior 2 is stopped, that target has no resumed thread
- handle_no_resumed tries to update the thread list of all targets:
for (auto *target : all_non_exited_process_targets ())
{
switch_to_target_no_thread (target);
update_thread_list ();
}
- When trying to update the thread list of inferior 1's target, it hits
the "Cannot execute this command while the target is running" error.
This target is working in "remote all-stop" mode, and it is currently
waiting for a stop reply, so it can't send packets to update the
thread list at this time.
To handle the problem described in the comment in handle_no_resumed, I
don't think it is necessary to update the thread list of all targets,
but only the event target. That comment describes a kind of race
condition where some target reports a breakpoint hit for a thread and
then its last remaining resumed thread exits, so sends a "no resumed"
event. If we ended up resuming the thread that hit a breakpoint, we
want to ignore the "no resumed" and carry on.
But I don't really see why we need to update the thread list on the
other targets. I can't really articulate this, it's more a gut feeling,
maybe I just fail to imagine the situation where this is needed. But
here is the patch anyway, so we can discuss it. The patch changes
handle_no_resumed to only update the thread list of the event target.
This fixes the test run shown above.
The way I originally tried to fix this was to make
remote_target::update_thread_list return early if the target is
currently awaiting a stop reply, since there's no way it can update the
thread list at that time. But that felt more like papering over the
problem. I then thought that we probably shouldn't be asking the target
to update the thread list unnecessarily.
Change-Id: Ide3df22b4f556478e155ad1c67ad4b4fe7c26a58
Simon Marchi [Fri, 22 Apr 2022 15:34:54 +0000 (11:34 -0400)]
gdbserver/linux: free process_info_private and arch_process_info when failing to attach
Running
$ ../gdbserver/gdbserver --once --attach :1234 539436
with ASan while /proc/sys/kernel/yama/ptrace_scope is set to 1 (prevents
attaching) shows that we fail to free some platform-specific objects
tied to the process_info (process_info_private and arch_process_info):
Direct leak of 32 byte(s) in 1 object(s) allocated from:
#0 0x7f6b558b3fb9 in __interceptor_calloc /usr/src/debug/gcc/libsanitizer/asan/asan_malloc_linux.cpp:154
#1 0x562eaf15d04a in xcalloc /home/simark/src/binutils-gdb/gdbserver/../gdb/alloc.c:100
#2 0x562eaf251548 in xcnew<process_info_private> /home/simark/src/binutils-gdb/gdbserver/../gdbsupport/poison.h:122
#3 0x562eaf22810c in linux_process_target::add_linux_process_no_mem_file(int, int) /home/simark/src/binutils-gdb/gdbserver/linux-low.cc:426
#4 0x562eaf22d33f in linux_process_target::attach(unsigned long) /home/simark/src/binutils-gdb/gdbserver/linux-low.cc:1132
#5 0x562eaf1a7222 in attach_inferior /home/simark/src/binutils-gdb/gdbserver/server.cc:308
#6 0x562eaf1c1016 in captured_main /home/simark/src/binutils-gdb/gdbserver/server.cc:3949
#7 0x562eaf1c1d60 in main /home/simark/src/binutils-gdb/gdbserver/server.cc:4084
#8 0x7f6b552f630f in __libc_start_call_main (/usr/lib/libc.so.6+0x2d30f)
Indirect leak of 56 byte(s) in 1 object(s) allocated from:
#0 0x7f6b558b3fb9 in __interceptor_calloc /usr/src/debug/gcc/libsanitizer/asan/asan_malloc_linux.cpp:154
#1 0x562eaf15d04a in xcalloc /home/simark/src/binutils-gdb/gdbserver/../gdb/alloc.c:100
#2 0x562eaf2a0d79 in xcnew<arch_process_info> /home/simark/src/binutils-gdb/gdbserver/../gdbsupport/poison.h:122
#3 0x562eaf295e2c in x86_target::low_new_process() /home/simark/src/binutils-gdb/gdbserver/linux-x86-low.cc:723
#4 0x562eaf22819b in linux_process_target::add_linux_process_no_mem_file(int, int) /home/simark/src/binutils-gdb/gdbserver/linux-low.cc:428
#5 0x562eaf22d33f in linux_process_target::attach(unsigned long) /home/simark/src/binutils-gdb/gdbserver/linux-low.cc:1132
#6 0x562eaf1a7222 in attach_inferior /home/simark/src/binutils-gdb/gdbserver/server.cc:308
#7 0x562eaf1c1016 in captured_main /home/simark/src/binutils-gdb/gdbserver/server.cc:3949
#8 0x562eaf1c1d60 in main /home/simark/src/binutils-gdb/gdbserver/server.cc:4084
#9 0x7f6b552f630f in __libc_start_call_main (/usr/lib/libc.so.6+0x2d30f)
Those objects are deleted by linux_process_target::mourn, but that is
not called if we fail to attach, we only call remove_process. I
initially fixed this by making linux_process_target::attach call
linux_process_target::mourn on failure (before calling error). But this
isn't done anywhere else (including in GDB) so it would just be
confusing to do things differently here.
Instead, add a linux_process_target::remove_linux_process helper method
(which calls remove_process), and call that instead of remove_process in
the Linux target. Move the free-ing of the extra data from the mourn
method to that new method.
Change-Id: I277059a69d5f08087a7f3ef0b8f1792a1fcf7a85
Andrew Burgess [Tue, 15 Feb 2022 17:28:03 +0000 (17:28 +0000)]
gdb: handle bracketed-paste-mode and EOF correctly
This commit replaces an earlier commit that worked around the issues
reported in bug PR gdb/28833.
The previous commit just implemented a work around in order to avoid
the worst results of the bug, but was not a complete solution. The
full solution was considered too risky to merge close to branching GDB
12. This improved fix has been applied after GDB 12 branched. See
this thread for more details:
https://sourceware.org/pipermail/gdb-patches/2022-March/186391.html
This commit replaces this earlier commit:
commit
74a159a420d4b466cc81061c16d444568e36740c
Date: Fri Mar 11 14:44:03 2022 +0000
gdb: work around prompt corruption caused by bracketed-paste-mode
Please read that commit for a full description of the bug, and why is
occurs.
In this commit I extend GDB to use readline's rl_deprep_term_function
hook to call a new function gdb_rl_deprep_term_function. From this
new function we can now print the 'quit' message, this replaces the
old printing of 'quit' in command_line_handler. Of course, we only
print 'quit' in gdb_rl_deprep_term_function when we are handling EOF,
but thanks to the previous commit (to readline) we now know when this
is.
There are two aspects of this commit that are worth further
discussion, the first is in the new gdb_rl_deprep_term_function
function. In here I have used a scoped_restore_tmpl to disable the
readline global variable rl_eof_found.
The reason for this is that, in rl_deprep_terminal, readline will
print an extra '\n' character before printing the escape sequence to
leave bracketed paste mode. You might then think that in the
gdb_rl_deprep_term_function function, we could simply print "quit" and
rely on rl_deprep_terminal to print the trailing '\n'. However,
rl_deprep_terminal only prints the '\n' when bracketed paste mode is
on. If the user has turned this feature off, no '\n' is printed.
This means that in gdb_rl_deprep_term_function we need to print
"quit" when bracketed paste mode is on, and "quit\n" when bracketed
paste mode is off.
We could absolutely do that, no problem, but given we know how
rl_deprep_terminal is implemented, it's easier (I think) to just
temporarily clear rl_eof_found, this prevents the '\n' being printed
from rl_deprep_terminal, and so in gdb_rl_deprep_term_function, we can
now always print "quit\n" and this works for all cases.
The second issue that should be discussed is backwards compatibility
with older versions of readline. GDB can be built against the system
readline, which might be older than the version contained within GDB's
tree. If this is the case then the system readline might not contain
the fixes needed to support correctly printing the 'quit' string.
To handle this situation I have retained the existing code in
command_line_handler for printing 'quit', however, this code is only
used now if the version of readline we are using doesn't not include
the required fixes. And so, if a user is using an older version of
readline, and they have bracketed paste mode on, then they will see
the 'quit' sting printed on the line below the prompt, like this:
(gdb)
quit
I think this is the best we can do when someone builds GDB against an
older version of readline.
Using a newer version of readline, or the patched version of readline
that is in-tree, will now give a result like this in all cases:
(gdb) quit
Which is what we want.
Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=28833
Andrew Burgess [Mon, 7 Mar 2022 13:49:21 +0000 (13:49 +0000)]
readline: back-port changes needed to properly detect EOF
This commit is a partial back-port of this upstream readline commit:
commit
002d31aa5f5929eb32d0e0e2e8b8d35d99e59961
Author: Chet Ramey <chet.ramey@case.edu>
Date: Thu Mar 3 11:11:47 2022 -0500
add rl_eof_found to public API; fix pointer aliasing problems \
with history-search-backward; fix a display problem with \
runs of invisible characters at the end of a physical \
screen line
I have only pulled in the parts of this commit that relate to the new
rl_eof_found global, and the RL_STATE_EOF state flag. These changes
are needed in order to fix PR cli/28833, and are discussed in this
thread to the bug-readline mailing list:
https://lists.gnu.org/archive/html/bug-readline/2022-02/msg00021.html
The above commit is not yet in any official readline release, but my
hope is that now it has been merged into the readline tree it should
be safe enough to back port this fix to GDB's tree.
At some point in the future we will inevitably want to roll forward
the version of readline that we maintain in the binutils-gdb
repository. When that day comes the changes in this commit can be
replaced with the latest upstream readline code, as I have not changed
the meaning of this code at all from what is in upstream readline.
This commit alone does not fix the PR cli/28833 issue, for that see
the next commit, which changes GDB itself.
Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=28833
Andrew Burgess [Tue, 29 Mar 2022 14:07:04 +0000 (15:07 +0100)]
gdb: improved EOF handling when using readline 7
In this commit:
commit
a6b413d24ccc5d76179bab866834e11fd6fec294
Date: Fri Mar 11 14:44:03 2022 +0000
gdb: work around prompt corruption caused by bracketed-paste-mode
a change was made to GDB to work around bug PR gdb/28833. The
consequence of this work around is that, when bracketed paste mode is
enabled in readline, and GDB is quit by sending EOF, then the output
will look like this:
(gdb)
quit
The ideal output, which is what we get when bracketed paste mode is
off, is this:
(gdb) quit
The reason we need to make this change is explained in the original
commit referenced above. What isn't mentioned in the above commit, is
that the change that motivated this work around was only added in
readline 8, older versions of readline don't require the change.
In later commits in this series I will add a fix to GDB's in-tree copy
of readline (this fix is back-ported from upstream readline), and then
I will change GDB so that, when using the (patched) in-tree readline,
we can have the ideal output in all cases.
However, GDB can be built against the system readline. When this is
done, and the system readline is version 8, then we will still have to
use the work around (two line) style output.
But, if GDB is built against the system readline, and the system
readline is an older version 7 readline, then there's no reason why we
can't have the ideal output, after all, readline 7 doesn't include the
change that we need to work around.
This commit changes GDB so that, when using readline 7 we get the
ideal output in all cases. This change is trivial (a simple check
against the readline version number) so I think this should be fine to
include.
For testing this commit, you need to configure GDB including the
'--with-system-readline' flag, and build GDB on a system that uses
readline 7, for example 'Ubuntu 18.04'. Then run the test
'gdb.base/eof-exit.exp', you should expect everything to PASS.
Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=28833
Simon Marchi [Fri, 22 Apr 2022 17:40:57 +0000 (13:40 -0400)]
gdb: prune inferiors at end of fetch_inferior_event, fix intermittent failure of gdb.threads/fork-plus-threads.exp
This test sometimes fail like this:
info threads^M
Id Target Id Frame ^M
11.12 process
2270719 Couldn't get registers: No such process.^M
(gdb) FAIL: gdb.threads/fork-plus-threads.exp: detach-on-fork=off: no threads left
[Inferior 11 (process
2270719) exited normally]^M
info inferiors^M
Num Description Connection Executable ^M
* 1 <null> /home/smarchi/build/binutils-gdb/gdb/testsuite/outputs/gdb.threads/fork-plus-threads/fork-plus-threads ^M
11 <null> /home/smarchi/build/binutils-gdb/gdb/testsuite/outputs/gdb.threads/fork-plus-threads/fork-plus-threads ^M
(gdb) FAIL: gdb.threads/fork-plus-threads.exp: detach-on-fork=off: only inferior 1 left (the program exited)
I can get it to fail quite reliably by pinning it to a core:
$ taskset -c 5 make check TESTS="gdb.threads/fork-plus-threads.exp"
The previous attempt at fixing this was:
https://sourceware.org/pipermail/gdb-patches/2021-October/182846.html
What we see is part due to a possible unfortunate ordering of events
given by the kernel, and what could be considered a bug in GDB.
The test program makes a number of forks, waits them all, then exits.
Most of the time, GDB will get and process the exit event for inferior 1
after the exit events of all the children. But this is not guaranteed.
After the last child exits and is waited by the parent, the parent can
exit quickly, such that GDB collects from the kernel the exit events for
the parent and that child at the same time. It then chooses one event
at random, which can be the event for the parent. This will result in
the parent appearing to exit before its child. There's not much we can
do about it, so I think we have to adjust the test to cope.
After expect has seen the "exited normally" notification for inferior 1,
it immediately does an "info thread" that it expects to come back empty.
But at this point, GDB might not have processed inferior 11's (the last
child) exit event, so it will look like there is still a thread. Of
course that thread is dead, we just don't know it yet. But that makes
the "no thread" test fail. If the test waited just a bit more for the
"exited normally" notification for inferior 11, then the list of threads
would be empty.
So, first change, make the test collect all the "exited normally"
notifications for all inferiors before proceeding, that should ensure we
see an empty thread list. That would fix the first FAIL above.
However, we would still have the second FAIL, as we expect inferior 11
to not be there, it should have been deleted automatically. Inferior 11
is normally deleted when prune_inferiors is called. That is called by
normal_stop, which is only called by fetch_inferior_event only if the
event thread completed an execution command FSM (thread_fsm). But the
FSM for the continue command completed when inferior 1 exited. At that
point inferior 11 was not prunable, as it still had a thread. When
inferior 11 exits, prune_inferiors is not called.
I think that can be considered a GDB bug. From the user point of view,
there's no reason why in one case inferior 11 would be deleted and not
in the other case.
This patch makes the somewhat naive change to call prune_inferiors in
fetch_inferior_event, so that it is called in this case. It is placed
at this particular point in the function so that it is called after the
user inferior / thread selection is restored. If it was called before
that, inferior 11 wouldn't be pruned, because it would still be the
current inferior.
Change-Id: I48a15d118f30b1c72c528a9f805ed4974170484a
Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=26272
Tom Tromey [Fri, 22 Apr 2022 15:28:10 +0000 (09:28 -0600)]
Un-break the coff-pe-read.c build
This fixes a build breakage in my recent coff-pe-read.c change.
I'm sorry about this. I don't understand how it happened, because I
definitely built and tested the series on Windows, and I didn't change
it before pushing. Something must have gone wrong on the Windows
build, but I don't know what. I'll investigate and and re-test to be
sure.
Tom Tromey [Tue, 19 Apr 2022 13:41:44 +0000 (07:41 -0600)]
More const use and alloca avoidance in coff-pe-read.c
This changes another function in coff-pe-read.c to use 'const' more,
and to avoid the use of alloca by instead using std::string.
Tom Tromey [Tue, 19 Apr 2022 13:33:09 +0000 (07:33 -0600)]
Use std::string in coff-pe-read.c
coff-pe-read.c uses xsnprintf and alloca, but using std::string is
better, and just as easy. In general I think alloca is something to
be avoided, and unbounded uses especially so.
Tom Tromey [Tue, 19 Apr 2022 13:30:08 +0000 (07:30 -0600)]
Remove a const-removing cast from coff-pe-read.c
coff-pe-read.c casts away const at one spot, but this is easily
replaced by calling bfd_get_filename directly in a couple of debugging
prints.
Tom Tromey [Tue, 19 Apr 2022 13:27:48 +0000 (07:27 -0600)]
Simplify BFD section iteration in coff-pe-read.c
coff-pe-read.c iterates over BFD sections using bfd_map_over_sections,
but it's much simpler to use a for-each loop. This allows for the
removal of helper functions and types.
Tom Tromey [Thu, 21 Apr 2022 15:37:24 +0000 (09:37 -0600)]
Fix method naming bug in new DWARF indexer
Pedro pointed out that gdb-add-index is much slower with the new DWARF
indexer. He also noticed that, in some cases, the generated
.gdb_index would have the wrong fully-qualified name for a method.
I tracked this down to a bug in the indexer. If a type could have
methods but was marked as a declaration, the indexer was ignoring it.
However, this meant that the internal map to find the qualified name
was not updated for this container.
Christoph Muellner [Thu, 21 Apr 2022 22:31:27 +0000 (00:31 +0200)]
RISC-V: Add missing DECLARE_INSNs for Zicbo{m,p,z}
The recently added support for the Zicbo{m,p,z} extensions did not
include DECLARE_INSN() declarations for the instructions.
These declarations are needed by GDB's instruction detection code.
This patch adds them.
Signed-off-by: Christoph Muellner <cmuellner@gcc.gnu.org>
GDB Administrator [Fri, 22 Apr 2022 00:00:20 +0000 (00:00 +0000)]
Automatic date update in version.in
Carl Love [Tue, 22 Mar 2022 20:23:44 +0000 (15:23 -0500)]
Fix for gdb.base/solib-search.exp test.
The variable right_lib_flags is not being set correctly to define RIGHT.
The value RIGHT is needed to force the address of the library functions
lib1_func3 and lib2_func4 to occur at different address in the wrong and
right libraries.
With RIGHT defined correctly, functions lib1_func3 and lib2_func4 occur
at different addresses the test runs correctly on Powerpc.
The test needs the lib2 addresses to be different in the right and
wrong cases. That is the point of introducing function lib2_spacer
with the ifdef RIGHT compiler directive.
On Intel, the ARRAY_SIZE of 1 versus 8192 is sufficient to get the
dynamic linker to move the addresses of the library. You can also get
the same effect on PowerPC but you must use a value much larger than
8192.
The key thing is that the test was not properly setting RIGHT to
defined to get the lib2_spacer function on Intel and Powerpc.
Without the patch, we have the Intel backtrace for the bad libraries:
backtrace
#0 break_here () at /home/ ... /gdb/testsuite/gdb.base/solib-search.c:30
#1 0x00007ffff7fae156 in ?? ()
#2 0x00007fffffffc150 in ?? ()
#3 0x00007ffff7fbb156 in ?? ()
#4 0x00007fffffffc160 in ?? ()
#5 0x00007ffff7fae146 in ?? ()
#6 0x00007fffffffc170 in ?? ()
#7 0x00007ffff7fbb146 in ?? ()
#8 0x00007fffffffc180 in ?? ()
#9 0x0000555555555156 in main () at /home/ ... /binutils-gdb/gdb/testsuite/gdb.base/solib-search.c:23
Backtrace stopped: previous frame inner to this frame (corrupt stack?)
(gdb) PASS: gdb.base/solib-search.exp: backtrace (with wrong libs) (data collection)
The backtrace on Intel with the good libraries is:
backtrace
#0 break_here () at /.../binutils-gdb/gdb/testsuite/gdb.base/solib-search.c:30
#1 0x00007ffff7fae156 in lib2_func4 () at /.../binutils-gdb/gdb/testsuite/gdb.base/solib-search-lib2.c:49
#2 0x00007ffff7fbb156 in lib1_func3 () at /.../gdb.base/solib-search-lib1.c:49
#3 0x00007ffff7fae146 in lib2_func2 () at /.../testsuite/gdb.base/solib-search-lib2.c:30
#4 0x00007ffff7fbb146 in lib1_func1 () at /.../gdb.base/solib-search-lib1.c:30
#5 0x0000555555555156 in main () at /...solib-search.c:23
(gdb) PASS: gdb.base/solib-search.exp: backtrace (with right libs) (data collection)
PASS: gdb.base/solib-search.exp: backtrace (with right libs)
In one case the backtrace is correct and the other it
is wrong on Intel. This is due to the fact that the ARRAY_SIZE caused
the dynamic linker to move the library function addresses around. I
believe it has to do with the default size of the data and code
sections used by the dynamic linker.
So without the patch the backtrace on PowerPC looks like:
backtrace
#0 break_here () at /.../solib-search.c:30
#1 0x00007ffff7f007f4 in lib2_func4 () at /.../solib-search-lib2.c:49
#2 0x00007ffff7f307f4 in lib1_func3 () at /.../solib-search-lib1.c:49
#3 0x00007ffff7f007ac in lib2_func2 () at /.../solib-search-lib2.c:30
#4 0x00007ffff7f307ac in lib1_func1 () at /.../solib-search-lib1.c:30
#5 0x000000001000074c in main () at /.../solib-search.c:23
for both the good and bad libraries.
The patch fixes defining RIGHT in solib-search-lib1.c and solib-search-
lib2.c. Note, without the patch the lib1_spacer and lib2_spacer
functions do not show up in the object dump of the Intel or Powerpc
libraries as it should. The patch fixes that by making sure RIGHT gets
defined.
Now with the patch the backtrace for the bad library on PowerPC looks
like:
backtrace
#0 break_here () at /.../solib-search.c:30
#1 0x00007ffff7f0083c in __glink_PLTresolve () from /.../solib-search-lib2.so
Backtrace stopped: frame did not save the PC
And the backtrace for the good libraries on PowerPC looks like:
backtrace
#0 break_here () at /.../solib-search.c:30
#1 0x00007ffff7f0083c in lib2_func4 () at /.../solib-search-lib2.c:49
#2 0x00007ffff7f3083c in lib1_func3 () at /.../solib-search-lib1.c:49
#3 0x00007ffff7f007cc in lib2_func2 () at /.../solib-search-lib2.c:30
#4 0x00007ffff7f307cc in lib1_func1 () at /.../solib-search-lib1.c:30
#5 0x000000001000074c in main () at /.../solib-search.c:23
(gdb) PASS: gdb.base/solib-search.exp: backtrace (with right libs) (data collection)
PASS: gdb.base/solib-search.exp: backtrace (with right libs)
The issue then is on Power where the ARRAY_SIZE of 1 versus 8192 is not
sufficient to cause the dymanic linker to allocate the libraries at
different addresses. I don't claim to understand the specifics of how
the dynamic linker works and what the default size is for the data and
code sections are. My guess is by default PowerPC allocates a larger
data size by default, which is large enough to hold array[8192]. The
default size of the data section allocated by the dynamic linker on
Intel is not large enough to hold array[8192] thus causing the code
section on Intel to have to move when the large array is defined.
Note on PowerPC, if you make ARRAY_SIZE big enough, then you will cause
the library addresses to occur at different addresses as the larger
data section forces the code section to a different address. That was
actually my original fix for the program until I spoke with Doug Evans
who originally wrote the test. Doug noticed that RIGHT was not getting
defined as he originally intended in the test.
With the patch to fix the definition of RIGHT, PowerPC has a bad and a
good backtrace because the address of lib1_func3 and lib2_func4 both
move because lib1_spacer and lib2_spacer are now defined
before lib1_func3 and lib2_func4.
Without the patch, the lib1_spacer and lib2_spacer function doesn't show
up in the binary for the correct or incorrect library on Intel or PowerPC.
With the patch, RIGHT gets defined as originally intended for the test on
both architectures and lib1_spacer and lib2_spacer function show up in the
binaries on both architectures changing the other function addresses as
intended thus causing the test work as intended on PowerPC.
Simon Marchi [Tue, 12 Apr 2022 19:36:16 +0000 (15:36 -0400)]
gdb/dwarf: remove line_header::header_length field
This can be a local in dwarf_decode_line_header.
Change-Id: I2ecf4616d1a3197bd1e81ded9f999a2da9a685af
Simon Marchi [Tue, 12 Apr 2022 19:31:24 +0000 (15:31 -0400)]
gdb/dwarf: remove line_header::total_length field
This doesn' have to be a field, it can simply be a local variable in
dwarf_decode_line_header. Name the local variable "unit_length", since
that's what the field in called in DWARF 4 and 5. It's always easier to
follow the code with the standard on the side when we use the same
terminology.
Change-Id: I3ad1022afd9410b193ea11b9b5437686c1e4e633
Simon Marchi [Thu, 21 Apr 2022 19:05:32 +0000 (15:05 -0400)]
gdb/testsuite: fix "set temporary breakpoint" DUPLICATEs
Commit
c67f4e538 ("gdb/testsuite: make gdb.ada/mi_prot.exp stop at
expected location") introduced some DUPLICATEs in MI tests using
mi_continue_to_line, for example:
DUPLICATE: gdb.ada/mi_ref_changeable.exp: mi_continue_to_line: set temporary breakpoint
These test names were previously differentiated by the location passed
to mi_continue_to_line. Since the location can contain a path, that
commit removed the location from the test name, in favor of a hardcoded
string "set temporary breakpoint", hence removing the differentiator.
mi_continue_to_line receives a "test" parameter, containing a test
name. Add a "with_test_prefix" with that name, so that all tests
recorded during mi_continue_to_line have this in their name.
mi_continue_to_line passes that "test" string to mi_get_stop_line, that
is a bit superfluous. mi_get_stop_line only uses that string in case of
failures (it doesn't record a pass if everything goes fine). Since it's
not crucial, just remove it, and adjust all callers.
Adjust three gdb.mi/mi-var-*.exp tests to use prefixes to differentiate
the multiple calls to mi_run_inline_test (which calls
mi_continue_to_line).
Change-Id: I511c6caa70499f8657b1cde37d71068d74d56a74
Tom Tromey [Tue, 19 Apr 2022 17:32:04 +0000 (11:32 -0600)]
Always use dwarf2_initialize_objfile
Internally we noticed that some tests would fail like so on Windows:
warning: Section .debug_aranges in [...] has duplicate debug_info_offset 0x0, ignoring .debug_aranges.
Debugging showed that, in fact, a second CU was being created at this
offset. We tracked this down to the fact that, while the ELF reader
is careful to re-use the per-BFD data, other readers are not, and
could re-read the DWARF data multiple times.
However, since the change to allow an objfile to have multiple "quick
symbol" implementations, there's no reason for this approach -- it's
safe and easy for all symbol readers to reuse the per-BFD data when
reading DWARF.
This patch implements this idea, simplifying dwarf2_build_psymtabs and
making it private, and then switching to dwarf2_initialize_objfile as
the sole way to start the DWARF reader.
Note that, while I think the call to dwarf2_build_frame_info in
machoread.c is also obsolete, I haven't attempted to remove it here.
Andrew Burgess [Thu, 21 Apr 2022 10:16:18 +0000 (11:16 +0100)]
gdb: fix 'remote show FOO-packet' aliases
The following behaviour was observed in GDB:
(gdb) show remote X-packet
Support for the `p' packet is auto-detected, currently unknown.
Note the message mentions the 'p' packet. This is a regression since
this commit:
commit
8579fd136a614985bd27f20539c7bb7c5a51287d
Date: Mon Nov 8 14:58:46 2021 +0000
gdb/gdbsupport: make xstrprintf and xstrvprintf return a unique_ptr
Before this commit the behaviour was:
(gdb) show remote X-packet
Support for the `X' packet is auto-detected, currently unknown.
The problem was caused by a failed attempt to ensure that some
allocated strings were deleted when GDB exits. The code in the above
commit attempted to make use of 'static' to solve this problem,
however, the solution was just wrong.
In this new commit I instead allocate a static vector into which all
the allocated strings are stored, this ensures the strings are
released when GDB exits (which makes output from tools like valgrind
cleaner), but each string within the vector can be unique, which fixes
the regression.
Simon Marchi [Wed, 20 Apr 2022 21:03:25 +0000 (17:03 -0400)]
gdbsupport: add path_join function
In this review [1], Eli pointed out that we should be careful when
concatenating file names to avoid duplicated slashes. On Windows, a
double slash at the beginning of a file path has a special meaning. So
naively concatenating "/" and "foo/bar" would give "//foo/bar", which
would not give the desired results. We already have a few spots doing:
if (first_path ends with a slash)
path = first_path + second_path
else
path = first_path + slash + second_path
In general, I think it's nice to avoid superfluous slashes in file
paths, since they might end up visible to the user and look a bit
unprofessional.
Introduce the path_join function that can be used to join multiple path
components together (along with unit tests).
I initially wanted to make it possible to join two absolute paths, to
support the use case of prepending a sysroot path to a target file path,
or the prepending the debug-file-directory to a target file path. But
the code in solib_find_1 shows that it is more complex than this anyway
(for example, when the right hand side is a Windows path with a drive
letter). So I don't think we need to support that case in path_join.
That also keeps the implementation simpler.
Change a few spots to use path_join to show how it can be used. I
believe that all the spots I changed are guarded by some checks that
ensure the right hand side operand is not an absolute path.
Regression-tested on Ubuntu 18.04. Built-tested on Windows, and I also
ran the new unit-test there.
[1] https://sourceware.org/pipermail/gdb-patches/2022-April/187559.html
Change-Id: I0df889f7e3f644e045f42ff429277b732eb6c752
Lancelot SIX [Thu, 21 Apr 2022 08:28:21 +0000 (09:28 +0100)]
gdb_spawn_attach_cmdline: use unsupported instead of untested
In a previous commit (
b750766ac96: gdb/testsuite: Introduce and use
gdb_spawn_attach_cmdline), if gdb_spawn_attach_cmdline cannot have GDB
attach to the process because of ptrace restrictions (operation not
permitted), the proc issues UNTESTED. This should really be
UNSUPPORTED, as it is done in gdb_attach.
This patch fixes this oversight.
Change-Id: Ib87e33b9230f3fa7a85e06220ef4c63814b71f7d
Enze Li [Sat, 16 Apr 2022 07:36:29 +0000 (15:36 +0800)]
gdb/testsuite: add binary testcases to py-format-string.exp
We currently only test decimal and hexadecimal for the
gdb.Value.format_string() interface, this patch adds testcases for
binary format.
Tested on x86_64 openSUSE Tumbleweed(VERSION_ID="
20220413").
Pedro Alves [Thu, 21 Apr 2022 12:35:09 +0000 (13:35 +0100)]
gdb.debuginfod/fetch_src_and_symbols.exp: Fix "notice empty URL" test
The gdb_test_multiple pattern for the "notice empty URL" test in
gdb.debuginfod/fetch_src_and_symbols.exp misses expecting the prompt.
Fix it by using -re -wrap.
Also, by using "confirm off", the message GDB prints if Debuginfod
downloading is available doesn't contain "Enable debuginfod" any
longer. E.g.:
~~~
(gdb) file testsuite/outputs/gdb.debuginfod/fetch_src_and_symbols/fetch_src_and_symbols
Reading symbols from testsuite/outputs/gdb.debuginfod/fetch_src_and_symbols/fetch_src_and_symbols...
This GDB supports auto-downloading debuginfo from the following URLs:
<http://localhost:123>
Enable debuginfod for this session? (y or [n])
~~~
~~~
(gdb) with confirm off -- file testsuite/outputs/gdb.debuginfod/fetch_src_and_symbols/fetch_src_and_symbols
Reading symbols from testsuite/outputs/gdb.debuginfod/fetch_src_and_symbols/fetch_src_and_symbols...
This GDB supports auto-downloading debuginfo from the following URLs:
<http://127.0.0.1:8000>
<127.0.0.1:8000>
Debuginfod has been disabled.
To make this setting permanent, add 'set debuginfod enabled off' to .gdbinit.
(No debugging symbols found in testsuite/outputs/gdb.debuginfod/fetch_src_and_symbols/fetch_src_and_symbols)
(gdb)
~~~
I handled that correctly in the other tests that use test_urls, but
had forgotten to update the "notice empty URL" one.
Change-Id: I00040c83466e1494b3875574eb009c571a1504bf
Alan Modra [Wed, 20 Apr 2022 23:19:30 +0000 (08:49 +0930)]
prune .note.GNU-stack warning from testsuite
binutils/
* testsuite/lib/binutils-common.exp (prune_warnings_extra): Remove
.note.GNU-stack warning.
(run_dump_test): Call prune_warnings for ld and objcopy output.
ld/
* testsuite/ld-elf/elf.exp: Disable prune_warnings_extra temporarily
around test for absent .note.GNU-stack
* testsuite/ld-cris/globsymw2.s,
* testsuite/ld-cris/warn3.d: Modify "is not implemented" message
to avoid dejagnu prune_warnings.
Alan Modra [Wed, 20 Apr 2022 23:20:02 +0000 (08:50 +0930)]
ld testsuite xcoff XPASS
* testsuite/ld-scripts/defined5.d: Don't xfail xcoff targets.
Alan Modra [Fri, 15 Apr 2022 23:15:42 +0000 (08:45 +0930)]
Delete unused COFF gas macro
* config/obj-coff.h (sy_obj): Don't define.
(OBJ_SYMFIELD_TYPE): Revise comments.
GDB Administrator [Thu, 21 Apr 2022 00:00:13 +0000 (00:00 +0000)]
Automatic date update in version.in
Aaron Merey [Fri, 8 Apr 2022 22:50:56 +0000 (18:50 -0400)]
gdb/debuginfod: Prevent out_of_range exception
Trailing whitespace in the string of debuginfod URLs causes an
out_of_range exception during the printing of URLs for the first
use notice.
To fix this, stop printing URLs when the substring to be printed
consists only of whitespace.
Also add first use notice testcases.
Co-Authored-By: Pedro Alves <pedro@palves.net>
Lancelot SIX [Thu, 14 Apr 2022 09:41:48 +0000 (10:41 +0100)]
gdb/testsuite: Introduce and use gdb_spawn_attach_cmdline
Following
a7e6a19e87f3d719ea23c65b580a6d9bca4ccab3 "gdb: testsuite: add
new gdb_attach to check "attach" command", this commit proposes to
introduce the gdb_spawn_attach_cmdline helper and use it in
gdb.base/attach.exp.
This helper starts GDB and adds the "--pid=$PID" argument.
Also note that both the original and new implementation use
gdb_spawn_with_cmdline_opts, which in the end uses default_gdb_spawn.
This makes sure that we use $INTERNAL_GDBFLAGS, which by default already
contain "-iex \"set height 0\" -iex \"set width 0\"". To avoid
repetition of those arguments, gdb_spawn_attach_cmdline does not repeat
those arguments.
To maintain a behavior similat to what gdb.base/attach.exp used to do,
gdb_spawn_attach_cmdline keeps the -quiet flag.
Tested on x86_64-gnu-linux
Change-Id: I1fdcdb71c86d9c5d34bb28fc86fac68bcec37358
Tom Tromey [Mon, 18 Apr 2022 02:00:59 +0000 (20:00 -0600)]
Replace symbol_symtab with symbol::symtab
This turns symbol_symtab into a method on symbol. It also replaces
symbol_set_symtab with a method.
Tom Tromey [Mon, 18 Apr 2022 01:47:22 +0000 (19:47 -0600)]
Replace symbol_arch with symbol::arch
This turns symbol_arch into a method on symbol.
Tom Tromey [Mon, 18 Apr 2022 01:44:20 +0000 (19:44 -0600)]
Replace symbol_objfile with symbol::objfile
This turns symbol_objfile into a method on symbol.
Tom Tromey [Sat, 16 Apr 2022 18:49:50 +0000 (12:49 -0600)]
Remove symbol::aclass_index
Symbols have an aclass_index method, but this isn't needed, because
the aclass index isn't useful outside of the symbol implementation.
Tom Tromey [Sat, 16 Apr 2022 18:36:47 +0000 (12:36 -0600)]
Use array_view for symbol_impls
It seemed to me that using array_view for symbol_impls would give a
bit more error checking, at least when gdb is built in libstdc++ debug
mode.
Tom Tromey [Sat, 16 Apr 2022 18:33:56 +0000 (12:33 -0600)]
Add accessors for symbol's artificial field
For a series I'm experimenting with, it was handy to hide a symbol's
"artificial" field behind accessors. This patch is the result.
Tom Tromey [Tue, 23 Nov 2021 00:05:55 +0000 (17:05 -0700)]
Unify the DWARF index holders
The dwarf2_per_bfd object has a separate field for each possible kind
of index. Until an earlier patch in this series, two of these were
even derived from a common base class, but still had separate slots.
This patch unifies all the index fields using the common base class
that was introduced earlier in this series. This makes it more
obvious that only a single index can be active at a time, and also
removes some code from dwarf2_initialize_objfile.
Tom Tromey [Mon, 22 Nov 2021 23:53:34 +0000 (16:53 -0700)]
Add an ad hoc version check to dwarf_scanner_base
Some generic code in the DWARF reader has a special case for older
versions of .gdb_index. This patch adds an ad hoc version check
method so that these spots can work without specific knowledge of
which index is in use.
Tom Tromey [Mon, 22 Nov 2021 23:50:46 +0000 (16:50 -0700)]
Simplify version check in dw2_symtab_iter_next
This simplifies the index versio check in dw2_symtab_iter_next, by
passing a reference to the index object to this function. This avoids
an indirection via the per_bfd object.
Tom Tromey [Mon, 22 Nov 2021 23:43:47 +0000 (16:43 -0700)]
Introduce and use dwarf_scanner_base
This introduces dwarf_scanner_base, a base class for all the index
readers in the DWARF code. Then, it changes both mapped_index_base
and cooked_index_vector to derive from this new base class.
Tom Tromey [Tue, 30 Mar 2021 02:14:30 +0000 (20:14 -0600)]
Introduce readnow_functions
This introduces readnow_functions, a new subclass of
dwarf2_base_index_functions, and changes the DWARF reader to use it.
This lets us drop the "index is NULL" hack from the gdb index code.
Tom Tromey [Tue, 30 Mar 2021 00:31:31 +0000 (18:31 -0600)]
Remove some "OBJF_READNOW" code from dwarf2_debug_names_index
The dwarf2_debug_names_index code treats a NULL debug_names_table as
if it were from OBJF_READNOW. However, this trick is only done for
gdb_index, never for debug_names -- see dwarf2_initialize_objfile.
Tom Tromey [Mon, 29 Mar 2021 23:58:21 +0000 (17:58 -0600)]
Let mapped index classes create the quick_symbol_functions object
This changes the mapped index classes to create the
quick_symbol_functions objects. This is a step toward having a more
abstract interface to mapped indices.
Tom Tromey [Mon, 29 Mar 2021 23:44:57 +0000 (17:44 -0600)]
Give mapped_index_base a virtual destructor
This changes mapped_index_base to have a virtual destructor, so it can
be destroyed via its base class.
Tom Tromey [Mon, 29 Mar 2021 23:42:36 +0000 (17:42 -0600)]
Move mapped_index_base to new header file
This moves mapped_index_base and the helper struct name_component to a
new header file in gdb/dwarf2/.
Jan Beulich [Wed, 20 Apr 2022 14:56:05 +0000 (16:56 +0200)]
x86: reject all invalid SAE variants
So far an SAE-only specifier was accepted for static-rounding insns,
while SAE-only insns didn't accept static rounding specifiers. If
anything it would make sense the other way around, allowing SAE-only
insns to have the (ignored) rounding mode specified individually rather
than globally via -mevexrcig=. But for now make things match the SDM.
Alan Modra [Wed, 20 Apr 2022 14:26:08 +0000 (23:56 +0930)]
Re: xcoff: implement linker relaxation
* xcofflink.c (xcoff_stub_csect_name): Increase buffer size.
(xcoff_stub_get_csect_in_range, xcoff_build_one_stub): Whitespace.
(bfd_xcoff_size_stubs): Cast PRIx64 arg to required type.
Don't use freed stub_name.
Alan Modra [Wed, 20 Apr 2022 13:54:46 +0000 (23:24 +0930)]
Revert "as: Reject unknown -gXXX option" testsuite
This reverts the test committed as part of
6ea673e2d6.
Cl?ment Chigot [Wed, 20 Apr 2022 14:11:47 +0000 (15:11 +0100)]
xcoff: implement linker relaxation
bfd/ChangeLog:
* coff-rs6000.c (xcoff_reloc_type_noop): Add info argument.
(xcoff_reloc_type_fail): Likewise.
(xcoff_reloc_type_pos): Likewise.
(xcoff_reloc_type_neg): Likewise.
(xcoff_reloc_type_rel): Likewise.
(xcoff_reloc_type_toc): Likewise.
(xcoff_reloc_type_ba): Likewise.
(xcoff_reloc_type_crel): Likewise.
(xcoff_reloc_type_tls): Likewise.
(xcoff_reloc_type_br): Add stub handler.
(xcoff_ppc_relocate_section): Add info to
xcoff_calculate_relocation.
(xcoff_stub_indirect_call_code): New constant.
(xcoff_stub_shared_call_code): Likewise.
(bfd_xcoff_backend_data): Add stub code fields.
(bfd_pmac_xcoff_backend_data): Likewise.
* coff64-rs6000.c (xcoff64_reloc_type_br): Add stub handler.
(xcoff64_ppc_relocate_section): Add info to
xcoff64_calculate_relocation.
(xcoff64_stub_indirect_call_code): New constant.
(xcoff64_stub_shared_call_code): Likewise.
(bfd_xcoff_backend_data): Add stub code fields.
(bfd_xcoff_aix5_backend_data): Likewise.
* libxcoff.h (struct xcoff_backend_data_rec): Add stub fields.
(bfd_xcoff_stub_indirect_call_code): New define.
(bfd_xcoff_stub_indirect_call_size): New define.
(bfd_xcoff_stub_shared_call_code): New define.
(bfd_xcoff_stub_shared_call_size): New define.
(xcoff_reloc_function): Add info argument.
(enum xcoff_stub_type): New enum.
(struct xcoff_stub_hash_entry): New structure.
* xcofflink.c (struct xcoff_link_hash_table): Add stub hash
table and params fields.
(xcoff_stub_hash_entry): New define.
(xcoff_stub_hash_lookup): New define.
(stub_hash_newfunc): New function.
(_bfd_xcoff_bfd_link_hash_table_free): Free the new stub hash
table.
(_bfd_xcoff_bfd_link_hash_table_create): Create the new stub
hash table.
(xcoff_link_add_symbols): Save rawsize for XTY_SD.
(bfd_xcoff_link_init): New function.
(xcoff_stub_csect_name): New function.
(xcoff_stub_get_csect_in_range): New function.
(xcoff_stub_name): New function.
(bfd_xcoff_get_stub_entry): New function.
(bfd_xcoff_type_of_stub): New function.
(xcoff_add_stub): New function.
(xcoff_build_one_stub): New function.
(bfd_xcoff_size_stubs): New function.
(bfd_xcoff_build_stubs): New function.
(xcoff_stub_create_relocations): New function.
(xcoff_link_input_bfd): Adapt relocations to stub.
(xcoff_write_global_symbol): Adapt to new TOC entries generated
for stubs.
(_bfd_xcoff_bfd_final_link): Handle stub file.
* xcofflink.h (struct bfd_xcoff_link_params): New structure.
ld/ChangeLog:
* emultempl/aix.em (params): New variable.
(stub_file): New variable.
(xcoff_add_stub_section): New function.
(xcoff_layout_sections_again): New function
(hook_in_stub): New function.
(_after_allocation): Add stub creation.
(_create_output_section_statements): Allocate stub file and
pass params to backend.
Cl?ment Chigot [Wed, 20 Apr 2022 14:07:50 +0000 (15:07 +0100)]
Stubs (added in a later patch) will generate new .loader symbols, once the allocations have been done. Thus, the .loader section cannot be layout before that.
bfd/ChangeLog:
* coff-rs6000.c (_bfd_xcoff_put_ldsymbol_name): Write len in
ldinfo->strings instead of directly in the output_bfd.
* coff64-rs6000.c (_bfd_xcoff64_put_ldsymbol_name): Likewise.
* xcofflink.c (struct xcoff_link_hash_table): Remove ldrel_count
field. Add ldinfo field.
(xcoff_mark_symbol): Adjust to new ldinfo field.
(xcoff_mark): Likewise.
(bfd_xcoff_link_count_reloc): Likewise.
(xcoff_build_loader_section): Split into two functions: one that
build the loader section (this function) and one that only size
it...
(xcoff_size_loader_section): ... (this function).
(bfd_xcoff_size_dynamic_sections): Adapt to new ldinfo field.
Move the part where the dynamic sections are build to ...
(bfd_xcoff_build_dynamic_sections): ... this function.
* xcofflink.h: Add bfd_xcoff_build_dynamic_sections prototype.
include/ChangeLog:
* coff/xcoff.h (struct xcoff_loader_info): Add ldrel_count and
libpath fields.
ld/ChangeLog:
* emultempl/aix.em (_after_allocation): New function.
Tom Tromey [Sat, 16 Apr 2022 20:19:18 +0000 (14:19 -0600)]
Use symbol_symtab accessor in compile-object-load.c
I noticed that compile-object-load.c directly references owner.symtab
of a symbol. However, I think it's better for all users to call
symbol_symtab. This patch makes this change.
Nick Clifton [Wed, 20 Apr 2022 12:37:51 +0000 (13:37 +0100)]
Add linker warning for when it creates an executable stack.
PR 29072
Tom Tromey [Wed, 20 Apr 2022 05:44:50 +0000 (23:44 -0600)]
Micro-optimize cooked_index_entry::full_name
I noticed that cooked_index_entry::full_name can return the canonical
string when there is no parent entry.
Regression tested on x86-64 Fedora 34.
Tiezhu Yang [Wed, 20 Apr 2022 09:48:53 +0000 (17:48 +0800)]
gdb: LoongArch: Implement loongarch_scan_prologue()
If can't determine prologue from the symbol table, need to examine
instructions. Implement loongarch_scan_prologue() to analyze the
function prologue from START_PC to LIMIT_PC, return the address of
the first instruction past the prologue.
Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
GDB Administrator [Wed, 20 Apr 2022 00:00:11 +0000 (00:00 +0000)]
Automatic date update in version.in
H.J. Lu [Sat, 16 Apr 2022 17:46:05 +0000 (10:46 -0700)]
as: Reject unknown -gXXX option
* as.c (parse_args): Reject unknown -gXXX option.
* testsuite/gas/all/empty.s: New file.
* testsuite/gas/all/pr29067.d: Likewise.
* testsuite/gas/all/pr29067.err: Likewise.
* testsuite/gas/all/gas.exp: Run pr29067.
Lancelot SIX [Tue, 22 Mar 2022 14:02:54 +0000 (10:02 -0400)]
gdb/selftest-arch: Make register_test_foreach_arch generate arch tests lazily
The register_test_foreach_arch is used to instantiate a given selftest
for all architectures supported by GDB. It is used in many _initialize_*
functions (under initialize_all_files, called by gdb_init).
Because the call is done during GDB's initialization, and because there
is no guaranty about the order in which all the _initialize_* functions
are executed, when register_test_foreach_arch is called, GDB is not
fully initialized. Specifically, when a particular initialize function
is executed, only the architectures registered at that point are listed
by gdbarch_printable_names.
As a consequence, the list of selftest effectively executed depends on
the order the _initialize_* functions are called. This can be observed
with the following:
$ ./gdb/gdb \
-data-directory ./gdb/data-directory \
-quiet -batch -ex "maint selftest" 2>&1 \
| grep -E "Ran [0-9]+ unit tests"
Ran 145 unit tests, 0 failed
$ GDB_REVERSE_INIT_FUNCTIONS=1 ./gdb/gdb \
-data-directory ./gdb/data-directory \
-quiet -batch -ex "maint selftest" 2>&1 \
| grep -E "Ran [0-9]+ unit tests"
Ran 82 unit tests, 0 failed
To fix this, make register_test_foreach_arch register a lazy selftest
generator. This way when the test generator is eventually executed, all
architectures are registered and we do not have a dependency on the
order the initialize functions are executed in.
Tested on x86_64-linux
Change-Id: I88eefebf7d372ad672f42d3a103e89354bc8a925
Lancelot SIX [Tue, 22 Mar 2022 12:09:40 +0000 (08:09 -0400)]
gdbsupport/selftest: Allow lazy registration
This patch adds a way to delay the registration of tests until the
latest possible moment. This is intended for situations where GDB needs
to be fully initialized in order to decide if a particular selftest can
be executed or not.
This mechanism will be used in the next patch.
Change-Id: I7f6b061f4c0a6832226c7080ab4e3a2523e1b0b0
Lancelot SIX [Wed, 23 Mar 2022 15:29:53 +0000 (15:29 +0000)]
gdbsupport/selftest: Replace for_each_selftest with an iterator_range
Remove the callback-based selftests::for_each_selftest function and use
an iterator_range instead.
Also use this iterator range in run_tests so all iterations over the
selftests are done in a consistent way. This will become useful in a
later commit.
Change-Id: I0b3a5349a7987fbcb0071f11c394e353df986583
Jan Beulich [Tue, 19 Apr 2022 07:26:17 +0000 (09:26 +0200)]
x86: don't mistake ordinary immediates for SAE / rounding control
The way SAE templates are constructed was always puzzling me (including
the need for separate templates in the first place), and expressing the
extzra attribute via Imm8 actually has a bad effect: Ordinary immediates
would also be accepted, leading to an extra byte being added after the
instruction (i.e. generating bad code). Before re-working this (in
particular to accept proper Intel syntax there), fix the immediate issue
by adding the so far missing check.
Jan Beulich [Tue, 19 Apr 2022 07:25:25 +0000 (09:25 +0200)]
x86: VCMPSH is Evex.LLIG
These were mistakenly flagged as Evex.128. Getting the LLIG status right
for insns allowing for SAE is a prereq for planned further work.
Jan Beulich [Tue, 19 Apr 2022 07:24:53 +0000 (09:24 +0200)]
x86: drop stray CheckRegSize from VFPCLASSPH
Like VFPCLASSP{S,D} it has only a single operand allowing multiple
sizes, hence there are no pairs of operands to check for consistent
size.
Jan Beulich [Tue, 19 Apr 2022 07:24:24 +0000 (09:24 +0200)]
x86/Intel: test non-legacy VCVT{,U}SI2SH insn forms
For an unclear reason corresponding AVX512F tests were apparently not
cloned or used as reference here, and instead the bogus legacy forms of
the insns (with the embedded rounding specifier not last) were used.
Jan Beulich [Tue, 19 Apr 2022 07:23:49 +0000 (09:23 +0200)]
x86: correct and simplify NOP disassembly
It's not just REX.W which is ignored with opcode 0x90. The same goes for
REX.R and REX.X as well as empty REX. None of these are forms of
"xchg %eax,%eax" (which would mean zero-extending %eax to %rax), so they
also shouldn't be disassembled this way.
While there simplify things: A single hook function suffices, thus
making it unnecessary to keep two expressions in sync. And checking
ins->address_mode for mode_64bit also is unnecessary, as "rex" can be
non-zero only in that case anyway.
GDB Administrator [Tue, 19 Apr 2022 00:00:19 +0000 (00:00 +0000)]
Automatic date update in version.in
Simon Marchi [Thu, 7 Apr 2022 01:51:56 +0000 (21:51 -0400)]
gdb/testsuite/dwarf: don't automatically add directory and file entry for DWARF 5
To support DWARF 5 in the DWARF assembler line tables, we currently copy
the first user-provided directory and the first user-provided files and
make them elements at indices 0 in the directory and file name tables.
That was a sufficient behavior at the time (see commit
44fda089397a
("[gdb/testsuite] Support .debug_line v5 in dwarf assembler")), but in
the following patches, I would need to have finer grained control on
what is generated exactly. For example, I'd like to generate a DWARF 5 line
table with just a single file and a single directory.
Get rid of this behavior, and implement what is suggested in
44fda089397a: make include_dir return the directory index that can be
used to refer to that directory entry (based on the DWARF version), and
use it afterwards.
Adjust dw2-lines.exp and dw2-prologue-end.exp accordingly. Their produced
DWARF5 binaries will change a bit, in that they will now have a single
directory and file, where they had two before. But it doesn't change
the expected GDB behavior.
Change-Id: I5459b16ac9b7f28c34c9693c35c9afd2ebb3aa3b
Simon Marchi [Thu, 14 Apr 2022 00:12:37 +0000 (20:12 -0400)]
gdb: use gdb_tilde_expand instead of gdb_tilde_expand_up in source_script_with_search
Since this is the latest use of gdb_tilde_expand_up, remove it.
Change-Id: I964c812ce55fe087876abf91e7a3577ad79c0425
Simon Marchi [Wed, 13 Apr 2022 21:39:06 +0000 (17:39 -0400)]
gdbsupport: make gdb_realpath_keepfile return an std::string
I'm trying to switch these functions to use std::string instead of char
arrays, as much as possible. Some callers benefit from it (can avoid
doing a copy of the result), while others suffer (have to make one more
copy).
Change-Id: I793aab17baaef8345488f4c40b9094e2695425bc
Simon Marchi [Wed, 13 Apr 2022 21:31:02 +0000 (17:31 -0400)]
gdbsupport: make gdb_abspath return an std::string
I'm trying to switch these functions to use std::string instead of char
arrays, as much as possible. Some callers benefit from it (can avoid
doing a copy of the result), while others suffer (have to make one more
copy).
Change-Id: Iced49b8ee2f189744c5072a3b217aab5af17a993
Simon Marchi [Thu, 14 Apr 2022 00:03:18 +0000 (20:03 -0400)]
gdb: call gdb_tilde_expand instead of gdb_tilde_expand_up in source_script_with_search
This removes a use of gdb_tilde_expand_up, which is removed later in
this series.
Change-Id: I5887d526cea987103e4ca24514a982b0a28e992a
Tom Tromey [Mon, 18 Apr 2022 15:44:18 +0000 (09:44 -0600)]
Update gnulib
This updates gnulib to a relatively recent commit. Most of this was
done by the gnulib import script; the only change I made was to
update-gnulib.sh.
Tested on x86-64 Fedora 34. I also did a mingw cross build.
Tom Tromey [Sat, 2 Apr 2022 15:54:40 +0000 (09:54 -0600)]
Fix C++ cast of derived class to base class
PR c++/28907 points out that casting from a derived class to a base
class fails in some situations. The problem turned out to be a
missing use of value_embedded_offset. One peculiarity here is that,
if you managed to construct a pointer-to-derived with an embedded
offset of 0, the cast would work -- for example, one of the two new
tests here passes without the patch.
This embedded offset stuff is an endless source of bugs. I wonder if
it's possible to get rid of it somehow.
Regression tested on x86-64 Fedora 34.
Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=28907
Simon Marchi [Thu, 14 Apr 2022 16:26:33 +0000 (12:26 -0400)]
gdb/testsuite: make gdb.ada/mi_prot.exp stop at expected location
This test attempts to run until the line marked "STOP", which is at
prot.adb:34. It first runs until the "main" symbol, then tries to place
a breakpoint by line at line 34, without specifying the source file. When looking at the logs:
-break-insert -t 34^M
^done,bkpt={number="2",type="breakpoint",disp="del",enabled="y",addr="0x0000555555558a6c",func="adafinal",file="/home/simark/build/binutils-gdb-one-target/gdb/testsuite/outputs/gdb.ada/mi_pro t/b~prot.adb",fullname="/home/simark/build/binutils-gdb-one-target/gdb/testsuite/outputs/gdb.ada/mi_prot/b~prot.adb",line="44",thread-groups=["i1"],times="0",original-location="/home/simark/b uild/binutils-gdb-one-target/gdb/testsuite/outputs/gdb.ada/mi_prot/b~prot.adb:34"}^M
... continues ...
*stopped,reason="breakpoint-hit",disp="del",bkptno="2",frame={addr="0x0000555555558a6c",func="adafinal",args=[],file="/home/simark/build/binutils-gdb-one-target/gdb/testsuite/outputs/gdb.ada/ mi_prot/b~prot.adb",fullname="/home/simark/build/binutils-gdb-one-target/gdb/testsuite/outputs/gdb.ada/mi_prot/b~prot.adb",line="44",arch="i386:x86-64"},thread-id="1",stopped-threads="all",co re="8"^M
... we see that the breakpoint is placed in some generated file, not in
the test source file as we expect. The problem is that "b main" in Ada
does not place a breakpoint on the "Ada main", but on some symbol in a
generated source file. So when stopped at the "main" symbol, we are not
stopped in the file that contains the STOP marker at line 34.
The test passes anyway today, so it doesn't seem to matter that we are
stopped at an unexpected location. But it starts failing with this
patch [1], because b~prot.adb:34 happens to be between two functions, so
the breakpoint doesn't resolve.
Fix this by placing the breakpoint at "$srcfile:$line", which works
regardless of what is the current source file.
However, this ends up introducing a path in the test name. Modify
mi_tbreak and mi_continue_to_line to avoid that.
[1] https://sourceware.org/pipermail/gdb-patches/2022-April/187686.html
Change-Id: I742e2a9993046dcb5e30c64fe2ad920a363baf75