The flags for the "HSA" OS ABI are properly versioned and documented on
that page. But the NONE, PAL and MESA3D OS ABIs are not well documented
nor versioned. Taking a peek at the LLVM source code, we see that they
encode their flags the same way as HSA v3. For example, for PAL:
Simon Marchi [Wed, 16 Mar 2022 13:00:27 +0000 (09:00 -0400)]
bfd: add AMDGCN architecture
Add support for the AMDGCN architecture to BFD.
This is the bare minimum to get
$ ./configure --target=amdgcn-hsa-amdhsa --disable-gas
$ make all-binutils
working later in this series.
The specific AMDGCN models added here are a bit arbitrary, based on
what we intend to initially support in GDB. This list will need to be
updated in the future anyway. The complete up-to-date list of existing
AMDGPU models can be found here:
https://llvm.org/docs/AMDGPUUsage.html#processors
The ELF format for this architecture is documented here:
The flags for the "HSA" OS ABI are properly versioned and documented on
that page. But the NONE, PAL and MESA3D OS ABIs are not well documented
nor versioned. Taking a peek at the LLVM source code, we see that they
encode their flags the same way as HSA v3. For example, for PAL:
So at least, we know that all AMDGPU objects (of which AMDGCN objects
are a subset of) at the time of writing encode the specific GPU model in
the EF_AMDGPU_MACH field of e_flags.
Pedro Alves [Fri, 4 Mar 2022 17:34:18 +0000 (17:34 +0000)]
Make gdb.fortran/{array-slices,lbound-ubound} work against gdbserver
gdb.fortran/array-slices.exp and gdb.fortran/lbound-ubound.exp were
recently disabled unless testing with the native target, because they
rely on inferior I/O. However, when testing against gdbserver using
the native-gdbserver/native-extended-gdbserver boards, we do have
access to inferior I/O.
The right way to check whether the board can do I/O, is via checking
the gdb,noinferiorio board variable. Switch to using that.
And then, tweak the testcases to expect output to appear in
inferior_spawn_id, instead of gdb_spawn_id. When testing against the
native target, inferior_spawn_id is the same as gdb_spawn_id. When
testing against gdbserver, it maps to gdbserver_spawn_id.
This exposed a buglet in gdb.fortran/array-slices.f90's show_1d
subroutine -- it was missing printing newline at the end of the
"Expected GDB Output" text, leading to a test timeout. All other
subroutines end with advance=yes, except this one. Fix it by using
advance=yes here too.
Alan Modra [Tue, 15 Mar 2022 23:37:02 +0000 (10:07 +1030)]
PowerPC VLE extended instructions in powerpc_macros
This moves VLE insn out of the macro table. "e_slwi" and "e_srwi"
already exist in vle_opcodes as distinct instructions rather than
encodings of e_rlwinm.
Alan Modra [Tue, 15 Mar 2022 23:29:07 +0000 (09:59 +1030)]
PowerPC64 extended instructions in powerpc_macros
The extended instructions implemented in powerpc_macros aren't used by
the disassembler. That means instructions like "sldi r3,r3,2" appear
in disassembly as "rldicr r3,r3,2,61", which is annoying since many
other extended instructions are shown.
Note that some of the instructions moved out of the macro table to the
opcode table won't appear in disassembly, because they are aliases
rather than a subset of the underlying raw instruction. If enabled,
rotrdi, extrdi, extldi, clrlsldi, and insrdi would replace all
occurrences of rotldi, rldicl, rldicr, rldic and rldimi. (Or many
occurrences in the case of clrlsldi if n <= b was added to the extract
functions.)
The patch also fixes a small bug in opcode sanity checking.
Tom Tromey [Tue, 15 Mar 2022 22:13:57 +0000 (16:13 -0600)]
Do not capture updated 'pc' in add_local_symbols
Simon pointed out that commit 13835d88 ("Use function view when
iterating over block symbols") caused a regression. The bug is that
the new closure captures 'pc' by reference, but later code updates
this variable -- but the earlier code did not update the callback
structure with the new value.
This patch restores the old behavior by using a new varible name in an
inner scope.
Tom Tromey [Tue, 15 Mar 2022 18:55:51 +0000 (12:55 -0600)]
Fix bug in dwarf-mode.el
I noticed that, occasionally, dwarf-mode would think that the objdump
subprocess was still running after it had clearly exited. I managed
to reliably reproduce this today and learned that a process sentinel
is not guaranteed to be run with the current buffer set to the process
buffer. This patch fixes the problem.
I've bumped the version number of dwarf-mode.el to make it easier to
install for users who already have an earlier one installed.
I'm checking this in.
2022-03-15 Tom Tromey <tromey@adacore.com>
* dwarf-mode.el: Now 1.7.
(dwarf--sentinel): Switch to the process buffer.
Andrew Burgess [Tue, 15 Mar 2022 15:08:26 +0000 (15:08 +0000)]
gdb/testsuite: rename a proc and fix a typo
Rename a proc in gdb.mi/user-selected-context-sync.exp, I think the
old name was most likely a typo. The old name
match_re_or_ensure_not_output seems (to me) to imply we're in some way
checking that the regexp was not output. But that's not what we are
doing, we're checking either for the regexp, or for no output, hence
the new name match_re_or_ensure_no_output.
Additionally, I found a definite typo in one of the comments that I've
also fixed.
I also updated some test names. These tests (probably due to copy &
paste errors) has 'on MI' on their name, when they were actually
checking CLI output. For these test I changed the name to use 'on
CLI'.
There should be no change in what is tested after this commit.
Andrew Burgess [Tue, 23 Jun 2020 13:45:38 +0000 (14:45 +0100)]
gdb/python/mi: create MI commands using python
This commit allows a user to create custom MI commands using Python
similarly to what is possible for Python CLI commands.
A new subclass of mi_command is defined for Python MI commands,
mi_command_py. A new file, gdb/python/py-micmd.c contains the logic
for Python MI commands.
This commit is based on work linked too from this mailing list thread:
The version in this patch takes some core code from the previously
posted patches, but also has some significant differences, especially
after the feedback given here:
A new MI command can be implemented in Python like this:
class echo_args(gdb.MICommand):
def invoke(self, args):
return { 'args': args }
echo_args("-echo-args")
The 'args' parameter (to the invoke method) is a list
containing (almost) all command line arguments passed to the MI
command (--thread and --frame are handled before the Python code is
called, and removed from the args list). This list can be empty if
the MI command was passed no arguments.
When used within gdb the above command produced output like this:
(gdb)
-echo-args a b c
^done,args=["a","b","c"]
(gdb)
The 'invoke' method of the new command must return a dictionary. The
keys of this dictionary are then used as the field names in the mi
command output (e.g. 'args' in the above).
The values of the result returned by invoke can be dictionaries,
lists, iterators, or an object that can be converted to a string.
These are processed recursively to create the mi output. And so, this
is valid:
I have required that the fields names used in mi result output must
match the regexp: "^[a-zA-Z][-_a-zA-Z0-9]*$" (without the quotes).
This restriction was never written down anywhere before, but seems
sensible to me, and we can always loosen this rule later if it proves
to be a problem. Much harder to try and add a restriction later, once
people are already using the API.
What follows are some details about how this implementation differs
from the original patch that was posted to the mailing list.
In this patch, I have changed how the lifetime of the Python
gdb.MICommand objects is managed. In the original patch, these object
were kept alive by an owned reference within the mi_command_py object.
As such, the Python object would not be deleted until the
mi_command_py object itself was deleted.
This caused a problem, the mi_command_py were held in the global mi
command table (in mi/mi-cmds.c), which, as a global, was not cleared
until program shutdown. By this point the Python interpreter has
already been shutdown. Attempting to delete the mi_command_py object
at this point was causing GDB to try and invoke Python code after
finalising the Python interpreter, and we would crash.
To work around this problem, the original patch added code in
python/python.c that would search the mi command table, and delete the
mi_command_py objects before the Python environment was finalised.
In contrast, in this patch, I have added a new global dictionary to
the gdb module, gdb._mi_commands. We already have several such global
data stores related to pretty printers, and frame unwinders.
The MICommand objects are placed into the new gdb.mi_commands
dictionary, and it is this reference that keeps the objects alive.
When GDB's Python interpreter is shut down gdb._mi_commands is deleted,
and any MICommand objects within it are deleted at this point.
This change avoids having to make the mi_cmd_table global, and walk
over it from within GDB's python related code.
This patch handles command redefinition entirely within GDB's python
code, though this does impose one small restriction which is not
present in the original code (detailed below), I don't think this is a
big issue. However, the original patch relied on being able to
finish executing the mi_command::do_invoke member function after the
mi_command object had been deleted. Though continuing to execute a
member function after an object is deleted is well defined, it is
also (IMHO) risky, its too easy for someone to later add a use of the
object without realising that the object might sometimes, have been
deleted. The new patch avoids this issue.
The one restriction that is added to avoid this, is that an MICommand
object can't be reinitialised with a different command name, so:
(gdb) python cmd = MyMICommand("-abc")
(gdb) python cmd.__init__("-def")
can't reinitialize object with a different command name
This feels like a pretty weird edge case, and I'm happy to live with
this restriction.
I have also changed how the memory is managed for the command name.
In the most recently posted patch series, the command name is moved
into a subclass of mi_command, the python mi_command_py, which
inherits from mi_command is then free to use a smart pointer to manage
the memory for the name.
In this patch, I leave the mi_command class unchanged, and instead
hold the memory for the name within the Python object, as the lifetime
of the Python object always exceeds the c++ object stored in the
mi_cmd_table. This adds a little more complexity in py-micmd.c, but
leaves the mi_command class nice and simple.
Next, this patch adds some extra functionality, there's a
MICommand.name read-only attribute containing the name of the command,
and a read-write MICommand.installed attribute that can be used to
install (make the command available for use) and uninstall (remove the
command from the mi_cmd_table so it can't be used) the command. This
attribute will be automatically updated if a second command replaces
an earlier command.
This patch adds additional error handling, and makes more use the
gdbpy_handle_exception function.
Andrew Burgess [Thu, 10 Mar 2022 11:18:18 +0000 (11:18 +0000)]
gdb/gdbarch: compare some fields against 0 verify_gdbarch
After the previous commit, which removes the predicate function
gdbarch_register_type_p, I noticed that the gdbarch->register_type
field was not checked at in the verify_gdbarch function.
More than not being checked, the field wasn't mentioned at all.
I find this strange, I would expect that every field would at least be
mentioned - we already generate comments for some fields saying that
this field is _not_ being checked, so the fact that this field isn't
being checked looks (to me), like this field is somehow slipping
through the cracks.
The comment at the top of gdbarch-components.py tries to explain how
the validation is done. I didn't understand this comment completely,
but, I think this final sentence:
"Otherwise, the check is done against 0 (really NULL for function
pointers, but same idea)."
Means that, if non of the other cases apply, then the field should be
checked against 0, with 0 indicating that the field is invalid (was
not set by the tdep code). However, this is clearly not being done.
Looking in gdbarch.py at the code to generate verify_gdbarch we do
find that there is a case that is not handled, the case where the
'invalid' field is set true True, but non of the other cases apply.
In this commit I propose two changes:
1. Handle the case where the 'invalid' field of a property is set to
True, this should perform a check for the field of gdbarch still
being set to 0, and
2. If the if/else series that generates verify_gdbarch doesn't handle
a property then we should raise an exception. This means that if a
property is added which isn't handled, we should no longer silently
ignore it.
After doing this, I re-generated the gdbarch files and saw that the
following gdbarch fields now had new validation checks:
Looking at how these are currently set in the various -tdep.c files, I
believe the only one of these that is required to be set for all
architectures is the register_type field.
And so, for all of the other fields, I've changed the property
definition on gdbarch-components.py, setting the 'invalid' field to
False.
Now, after re-generation, the register_type field is checked against
0, thus an architecture that doesn't set_gdbarch_register_type will
now fail during validation. For all the other fields we skip the
validation, in which case, it is find for an architecture to not set
this field.
My expectation is that there should be no user visible changes after
this commit. Certainly for all fields except register_type, all I've
really done is cause some extra comments to be generated, so I think
that's clearly fine.
For the register_type field, my claim is that any architecture that
didn't provide this would fail when creating its register cache, and I
couldn't spot an architecture that doesn't provide this hook. As
such, I think this change should be fine too.
Andrew Burgess [Thu, 10 Mar 2022 10:57:18 +0000 (10:57 +0000)]
gdb/gdbarch: remove the predicate function for gdbarch_register_type
I don't believe that the gdbarch_register_type_p predicate is called
anywhere in GDB, and the gdbarch_register_type function is called
without checking the gdbarch_register_type_p predicate function
everywhere it is used, for example in
init_regcache_descr (regcache.c).
My claim is that the gdbarch_register_type function is required for
every architecture, and GDB will not work if this function is not
supplied.
And so, in this commit, I remove the 'predicate=True' from
gdbarch-components.py for the 'register_type' field, and regenerate
the gdbarch files.
There should be no user visible changes after this commit.
Patrick Monnerat [Sat, 12 Mar 2022 12:41:47 +0000 (13:41 +0100)]
Replace deprecated_target_wait_hook by observers
Commit b60cea7 (Make target_wait options use enum flags) broke
deprecated_target_wait_hook usage: there's a commit comment telling
this hook has not been converted.
Rather than trying to mend it, this patch replaces the hook by two
target_wait observers:
Upon target_wait entry, target_pre_wait is notified with the ptid
passed to target_wait. Upon exit, target_post_wait is notified with
the event ptid returned by target_wait. Should an exception occur,
event_ptid is null_ptid.
This change benefits to Insight (out-of-tree): there's no real use of the
late hook in gdb itself.
Tom Tromey [Thu, 10 Mar 2022 16:23:45 +0000 (09:23 -0700)]
Correctly print subrange types in generic_value_print
I noticed that generic_value_print assumes that a subrange type is
always a subrange of an integer type. However, this isn't necessarily
the case. In Ada, for example, one has subranges of character and
enumeration types.
This code isn't often exercised, I think, because languages with real
subrange types tend to implement their own printers. However, it
still seemed worth fixing.
Luis Machado [Tue, 4 Jan 2022 17:06:36 +0000 (14:06 -0300)]
[aarch64/arm] Properly extract the return value returned in memory
When running gdb.cp/non-trivial-retval.exp, the following shows up for
both aarch64-linux and armhf-linux:
Breakpoint 3, f1 (i1=23, i2=100) at src/gdb/testsuite/gdb.cp/non-trivial-retval.cc:35
35 A a;
(gdb) finish
Run till exit from #0 f1 (i1=23, i2=100) at src/gdb/testsuite/gdb.cp/non-trivial-retval.cc:35
main () at /src/gdb/testsuite/gdb.cp/non-trivial-retval.cc:163
163 B b = f2 (i1, i2);
Value returned is $6 = {a = -11952}
(gdb)
The return value should be {a = 123} instead. This happens because the
backends don't extract the return value from the correct location. GDB should
fetch a pointer to the memory location from X8 for aarch64 and r0 for armhf.
With the patch, gdb.cp/non-trivial-retval.exp has full passes on
aarch64-linux and armhf-linux on Ubuntu 20.04/18.04.
The problem only shows up with the "finish" command. The "call" command
works correctly and displays the correct return value.
This is also related to PR gdb/28681
(https://sourceware.org/bugzilla/show_bug.cgi?id=28681) and fixes FAIL's in
gdb.ada/mi_var_array.exp.
A new testcase is provided, and it exercises GDB's ability to "finish" a
function that returns a large struct (> 16 bytes) and display the
contents of this struct correctly. This has always been incorrect for
these backends, but no testcase exercised this particular scenario.
Without a -M cpu option given, powerpc objdump defaults currently to
-Mpower10 but -Many is also given. Commit 1ff6a3b8e562 regressed
-Many disassembly of instructions that are encoded differently
depending on cpu, such as mftb which has pre- and post-power4
encodings.
PR 28959
* ppc-dis.c (lookup_powerpc): Revert 2021-05-28 change. Instead
only look at deprecated PPC_OPCODE_RAW bit when -Many.
Tom Tromey [Sat, 12 Mar 2022 21:36:43 +0000 (14:36 -0700)]
Relax regexp in gdb.rust/unsized.exp
With nightly rustc, gdb.rust/unsized.exp fails:
(gdb) ptype *us
Structure has no component named operator*.
rustc changed to emit a bit more debug info for unsized types.
Because the original test is just to make sure that ptype of an
unsized array looks right, this patch relaxes the regexp and changes
the expression. I think this keeps the original test meaning, but
also works with nightly. I also tested stable and 1.48.
Tom Tromey [Mon, 13 Dec 2021 21:43:18 +0000 (14:43 -0700)]
Avoid crash with cross-linux core file
An internal test case creates a core file using gcore, then restarts
gdb with that core. When run with a cross-linux gdb (in this case,
x86-64 host with ppc64-linux target), the test fails:
| (gdb) core core
| [New LWP 18437]
| warning: `/lib64/libc.so.6': Shared library architecture unknown is not compatible with target architecture powerpc:common64.
| warning: Could not load shared library symbols for /lib64/ld64.so.1.
| Do you need "set solib-search-path" or "set sysroot"?
| ../../src/gdb/gdbarch.c:3388: internal-error: int gdbarch_elf_make_msymbol_special_p(gdbarch*): Assertion `gdbarch != NULL' failed.
| A problem internal to GDB has been detected,
| further debugging may prove unreliable.
| Quit this debugging session? (y or n) y
What's happening here is that the core file lists some shared
libraries. These aren't available via the solib search path, and so
gdb finds the local (x86-64) libraries. This is not ideal, but on the
other hand, it is what was asked for -- while the test does set
solib-search-path, it does not set the sysroot.
But, because gdb isn't configured to handle these libraries, it
crashes.
It seems to me that it's better to avoid the crash by having
solib_bfd_open fail in the case where a library is incompatible. That
is what this patch does. Now it looks like:
| [New LWP 15488]
| Error while mapping shared library sections:
| `/lib64/libc.so.6': Shared library architecture unknown is not compatible with target architecture powerpc:common64.
... and does not crash gdb.
I don't have a good setup for testing this using dejagnu, so I don't
know whether an existing gdb test covers this scenario.
Andrew Burgess [Thu, 10 Mar 2022 19:38:03 +0000 (19:38 +0000)]
gdb/testsuite: remove duplicates from gdb.base/stap-probe.exp
Remove the duplicate test names from gdb.base/stap-probe.exp, this is
done by actually passing a unique test name in a couple of
places (rather than using the command as the test name), and in
another couple of places, a test has a duplicate name due to a cut &
paste error, which I've fixed.
There's no change in what is actually being tested after this commit.
Aaron Merey [Thu, 10 Mar 2022 20:31:33 +0000 (15:31 -0500)]
gdb/auto-load: Remove repeating "auto-load" from debug message
Remove "auto-load:" from a format string passed to auto_load_debug_printf.
It is unnecessary since this function will prefix the string with "[auto-load]"
when printing it.
Tom Tromey [Thu, 17 Feb 2022 20:43:59 +0000 (13:43 -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
This has confused users multiple times -- see PR gdb/16242, where
there are several dups. I've also seen some confusion from this
internally at AdaCore.
The manual says:
'x'
Regard the bits of the value as an integer, and print the integer
in hexadecimal.
... which seems more useful. So, perhaps what happened is that this
was incorrectly implemented (or maybe correctly implemented and then
regressed, as there don't seem to be any tests).
This patch fixes the bug.
There was a previous discussion where we agreed to preserve the old
behavior:
Tom Tromey [Fri, 4 Mar 2022 18:40:49 +0000 (11:40 -0700)]
Simplify the ui-out progress API
I noticed that 'progress' is a method on ui-out, but it seems to me
that it would be better if the only API were via the progress_meter
class. This patch makes this change, changing progress to be a method
on the meter itself.
Lancelot SIX [Fri, 18 Feb 2022 15:05:51 +0000 (10:05 -0500)]
Process exit status is leader exit status testcase
This adds a multi-threaded testcase that has all threads in the
process exit with a different exit code, and ensures that GDB reports
the thread group leader's exit status as the whole-process exit
status. Before this set of patches, this would randomly report the
exit code of some other thread, and thus fail.
Tested on Linux-x86_64, native and gdbserver.
Co-Authored-By: Pedro Alves <pedro@palves.net>
Change-Id: I30cba2ff4576fb01b5169cc72667f3268d919557
Pedro Alves [Tue, 22 Feb 2022 10:15:07 +0000 (10:15 +0000)]
Re-add zombie leader on exit, gdbserver/linux
Same as the previous patch, but for GDBserver.
In summary, the current zombie leader detection code in linux-low.cc
has a race -- if a multi-threaded inferior exits just before
check_zombie_leaders finds that the leader is now zombie via checking
/proc/PID/status, check_zombie_leaders deletes the leader, assuming we
won't get an event for that exit (which we won't in some scenarios,
but not in this one), which is a false-positive scenario, where the
whole process is simply exiting. Later when we see the last LWP in
our list exit, we report that LWP's exit status as exit code, even
though for the (real) parent process, the exit code that counts is the
child's leader thread's exit code.
Like for GDB, the solution here is to:
- only report whole-process exit events for the leader.
- re-add the leader back to the LWP list when we finally see it
exit.
Pedro Alves [Mon, 21 Feb 2022 20:07:20 +0000 (20:07 +0000)]
Re-add zombie leader on exit, gdb/linux
The current zombie leader detection code in linux-nat.c has a race --
if a multi-threaded inferior exits just before check_zombie_leaders
finds that the leader is now zombie via checking /proc/PID/status,
check_zombie_leaders deletes the leader, assuming we won't get an
event for that exit (which we won't in some scenarios, but not in this
one). That might seem mostly harmless, but it has some downsides:
- later when we continue pulling events out of the kernel, we will
collect the exit event of the non-leader threads, and once we see
the last lwp in our list exit, we return _that_ lwp's exit code as
whole-process exit code to infrun, instead of the leader's exit
code.
- this can cause a hang in stop_all_threads in infrun.c. Say there
are 2 threads in the process. stop_all_threads stops each of those
threads, and then waits for two stop or exit events, one for each
thread. If the whole process exits, and check_zombie_leaders hits
the false-positive case, linux-nat.c will only return one event to
GDB (the whole-process exit returned when we see the last thread,
the non-leader thread, exit), making stop_all_threads hang forever
waiting for a second event that will never come.
However, in this false-positive scenario, where the whole process is
exiting, as opposed to just the leader (with pthread_exit(), for
example), we _will_ get an exit event shortly for the leader, after we
collect the exit event of all the other non-leader threads. Or put
another way, we _always_ get an event for the leader after we see it
become zombie.
I tried a number of approaches to fix this:
#1 - My first thought to address the race was to make GDB always
report the whole-process exit status for the leader thread, not for
whatever is the last lwp in the list. We _always_ get a final exit
(or exec) event for the leader, and when the race triggers, we're not
collecting it.
#2 - My second thought was to try to plug the race in the first place.
I thought of making GDB call waitpid/WNOHANG for all non-leader
threads immediately when the zombie leader is detected, assuming there
would be an exit event pending for each of them waiting to be
collected. Turns out that that doesn't work -- you can see the leader
become zombie _before_ the kernel kills all other threads. Waitpid in
that small time window returns 0, indicating no-event. Thankfully we
hit that race window all the time, which avoided trading one race for
another. Looking at the non-leader thread's status in /proc doesn't
help either, the threads are still in running state for a bit, for the
same reason.
#3 - My next attempt, which seemed promising, was to synchronously
stop and wait for the stop for each of the non-leader threads. For
the scenario in question, this will collect all the exit statuses of
the non-leader threads. Then, if we are left with only the zombie
leader in the lwp list, it means we either have a normal while-process
exit or an exec, in which case we should not delete the leader. If
_only_ the leader exited, like in gdb.threads/leader-exit.exp, then
after pausing threads, we will still have at least one live non-leader
thread in the list, and so we delete the leader lwp. I got this
working and polished, and it was only after staring at the kernel code
to convince myself that this would really work (and it would, for the
scenario I considered), that I realized I had failed to account for
one scenario -- if any non-leader thread is _already_ stopped when
some thread triggers a group exit, like e.g., if you have some threads
stopped and then resume just one thread with scheduler-locking or
non-stop, and that thread exits the process. I also played with
PTRACE_EVENT_EXIT, see if it would help in any way to plug the race,
and I couldn't find a way that it would result in any practical
difference compared to looking at /proc/PID/status, with respect to
having a race.
So I concluded that there's no way to plug the race, we just have to
deal with it. Which means, going back to approach #1. That is the
approach taken by this patch.
Pedro Alves [Thu, 24 Feb 2022 11:35:43 +0000 (11:35 +0000)]
gdbserver: Reindent check_zombie_leaders
This fixes the indentation of
linux_process_target::check_zombie_leaders, which will help with
keeping its comments in sync with the gdb/linux-nat.c counterpart.
Reorganize linux-low.cc:linux_process_target::filter_event such that
all the handling for events for LWPs not in the LWP list is together.
This helps make a following patch clearer. The comments and debug
messages have also been tweaked to have them synchronized with the GDB
counterpart.
Pedro Alves [Mon, 21 Feb 2022 20:07:20 +0000 (20:07 +0000)]
gdb: Reorganize linux_nat_filter_event
Reorganize linux-nat.c:linux_nat_filter_event such that all the
handling for events for LWPs not in the LWP list is together. This
helps make a following patch clearer. The comments and debug messages
have also been tweaked - the end goal is to have them synchronized
with the gdbserver counterpart.
Pedro Alves [Wed, 23 Feb 2022 11:17:26 +0000 (11:17 +0000)]
Fix gdb.threads/current-lwp-dead.exp race
If we make GDB report the process EXIT event for the leader thread, as
will be done in a latter patch of this series, then
gdb.threads/current-lwp-dead.exp starts failing:
(gdb) break fn_return
Breakpoint 2 at 0x5555555551b5: file /home/pedro/rocm/gdb/build/gdb/testsuite/../../../src/gdb/testsuite/gdb.threads/current-lwp-dead.c, line 45.
(gdb) continue
Continuing.
[New LWP 2138466]
[Inferior 1 (process 2138459) exited normally]
(gdb) FAIL: gdb.threads/current-lwp-dead.exp: continue to breakpoint: fn_return (the program exited)
The inferior exit reported is actually correct. The main thread has
indeed exited, and that's the thread that has the right exit code to
report to the user, as that's the exit code that is reported to the
program's parent. In this case, GDB managed to collect the exit code
for the leader thread before reaping the other thread, because in
reality, the testcase isn't creating standard threads, it is using raw
clone, and the new clones are put in their own thread group.
Fix it by making the main "thread" not exit until the scenario we're
exercising plays out. Also, run the program to completion for
completeness.
The original program really wanted the leader thread to exit before
the fn_return function was reached -- it was important that the
current thread as pointed by inferior_ptid was gone when infrun got
the breakpoint event. I've tweaked the testcase to ensure that that
condition is still held, though it is no longer the main thread that
exits. This required a bit of synchronization between the threads,
which required using CLONE_VM unconditionally. The #ifdef guards were
added as a fix for
https://sourceware.org/bugzilla/show_bug.cgi?id=11214, though I don't
think they were necessary because the program is not using TLS. If it
turns out they were necessary, we can link the testcase with "-z now"
instead, which was mentioned as an alternative workaround in that
Bugzilla.
Pedro Alves [Wed, 23 Feb 2022 11:17:26 +0000 (11:17 +0000)]
Fix gdb.threads/clone-new-thread-event.exp race
If we make GDB report the process EXIT event for the leader thread,
instead of whatever is the last thread in the LWP list, as will be
done in a latter patch of this series, then
gdb.threads/current-lwp-dead.exp starts failing:
(gdb) FAIL: gdb.threads/clone-new-thread-event.exp: catch SIGUSR1 (the program exited)
This is a testcase race -- the main thread does not wait for the
spawned clone "thread" to finish before exiting, so the main program
may exit before the second thread is scheduled and reports its
SIGUSR1. With the change to make GDB report the EXIT for the leader,
the race is 100% reproducible by adding a sleep(), like so:
Breakpoint 1, main (argc=1, argv=0x7fffffffd418) at gdb.threads/clone-new-thread-event.c:65
65 stack = malloc (STACK_SIZE);
(gdb) continue
Continuing.
[New LWP 3715562]
[Inferior 1 (process 3715555) exited normally]
(gdb) FAIL: gdb.threads/clone-new-thread-event.exp: catch SIGUSR1 (the program exited)
That inferior exit reported is actually correct. The main thread has
indeed exited, and that's the thread that has the right exit code to
report to the user, as that's the exit code that is reported to the
program's parent. In this case, GDB managed to collect the exit code
for the leader thread before reaping the other thread, because in
reality, the testcase isn't creating standard threads, it is using raw
clone, and the new clones are put in their own thread group.
Fix it by making the main thread wait for the child to exit. Also,
run the program to completion for completeness.
Turning on debug output in gdbserver leads to an assertion failure if
gdbserver reports a non-signal event:
[threads] wait_1: LWP 3273770: extended event with waitstatus status->kind = EXECD, execd_pathname = gdb.threads/non-ldr-exc-1/non-ldr-exc-1
[threads] wait_1: Hit a non-gdbserver trap event.
../../src/gdbserver/../gdb/target/waitstatus.h:365: A problem internal to GDBserver has been detected.
sig: Assertion `m_kind == TARGET_WAITKIND_STOPPED || m_kind == TARGET_WAITKIND_SIGNALLED' failed.
Fix it in the obvious way, using target_waitstatus::to_string(),
resulting in, for example:
[threads] wait_1: ret = LWP 1542412.1542412, status->kind = STOPPED, sig = GDB_SIGNAL_TRAP
Nick Clifton [Thu, 10 Mar 2022 09:11:40 +0000 (09:11 +0000)]
Add option to objdump/readelf to disable access to debuginfod servers.
* dwarf.c (use_debuginfod): New variable. Set to 1.
(load_separate_debug_info): Only call
debuginfod_fetch_separate_debug_info is use_debuginfod is true.
(dwarf_select_sections_by_names): Add do-not-use-debuginfod and
use-debuginfod options.
(dwarf_select_sections_by_letters): Add D and E options.
* dwarf.h (use_debuginfod): New extern.
* objdump.c (usage): Mention the new options.
* readelf.c (usage): Likewise.
* doc/binutils.texi: Document the new options.
* doc/debug-options.texi: Describe the new options.
* NEWS: Mention the new feature.
* testsuite/binutils-all/debuginfod.exp: Add tests of the new
options.
H.J. Lu [Wed, 2 Feb 2022 22:40:03 +0000 (14:40 -0800)]
ld: Add a before_plugin_all_symbols_read hook
Add a before_plugin_all_symbols_read hook to load symbol references from
DT_NEEDED entries, included from --copy-dt-needed-entries, before reading
plugin symbols to properly resolve plugin symbol references.
bfd/
PR ld/28849
* elf-bfd.h (elf_link_hash_table): Add handling_dt_needed.
* elflink.c (_bfd_elf_merge_symbol): Don't set non_ir_ref_dynamic
before plugin 'all symbols read' hook is called.
toplevel: Makefile.def: Make configure-sim depend on all-readline
Without this, a "make all-sim" without the equivalent of
libreadline-dev installed on the build system, won't
properly pick up the in-tree readline build, and you'll see:
mkdir -p -- ./sim
Configuring in ./sim
configure: creating cache ./config.cache
checking build system type... x86_64-pc-linux-gnu
checking host system type... x86_64-pc-linux-gnu
checking target system type... cris-axis-elf
checking for x86_64-pc-linux-gnu-gcc... gcc
checking whether the C compiler works... yes
...
checking for library containing tgetent... -ltermcap
checking for readline in -lreadline... no
configure: error: the required "readline" library is missing
make[1]: *** [Makefile:11188: configure-sim] Error 1
make[1]: Leaving directory '/home/hp/sim/b'
The sim dependency on readline is apparently (nominally)
valid as there's a readline call in sim/erc32/sis.c.
2022-02-21 Hans-Peter Nilsson <hp@axis.com>
* Makefile.def (dependencies): Make configure-sim depend on
all-readline.
GDB/testsuite: Remove a stray backslash from gdb.base/settings.exp
Remove a stray trailing backslash from `test-integer' in settings.exp.
It is harmless as only white space follows in the next line before the
closing brace, so it merely swallows the newline character, but it may
look confusing to the reader.
Alan Modra [Tue, 8 Mar 2022 12:19:52 +0000 (22:49 +1030)]
Reduce duplicated symbol_clone_if_forward_ref work
* symbol.c (struct symbol_flags): Add forward_resolved.
(symbol_entry_find): Update needle initialisation.
(symbol_clone_if_forward_ref): Do no work when forward_resolved
is already set. Set forward_resolved.
Aaron Merey [Tue, 8 Mar 2022 22:32:35 +0000 (17:32 -0500)]
gdb: Try searching for auto-load script using .gnu_debuglink
If an auto-load script cannot be found and objfile is a separate
debuginfo whose filename does not match the name found in the parent
file's .gnu_debuglink section, then repeat the search using the
parent's filename where the last component is replaced with the
.gnu_debuglink name.
For example if the parent's filename is "/usr/lib/libxyz.so" and the
name in its .gnu_debuglink section is "libxyz.so.debug", then
if no auto-load script is otherwise found the search will be
repeated with the filename "/usr/lib/libxyz.so.debug".
This helps gdb locate auto-load scripts when debuginfo files do not have
the expected filename, such as when they are aquired from debuginfod.
Aaron Merey [Sat, 20 Nov 2021 00:41:40 +0000 (19:41 -0500)]
PR gdb/27876 - debuginfod-downloaded source files don't pass proper fullname across mi / (gdb)info source
Source files downloaded from debuginfod currently use their original DWARF
filename as their "fullname". This causes a mismatch between the fullname
and the actual location of the source file in the debuginfod client cache.
MI consumers such as VSCode will fail to open debuginfod-downloaded
source files due to this. Also 'info source' will fail to include the
true paths of these files.
To fix this, use the debuginfod cache path as the fullname for debuginfod-
downloaded source files.
Jan Vrany [Wed, 2 Mar 2022 13:23:30 +0000 (13:23 +0000)]
gdb/mi: preserve user selected thread and frame when invoking MI commands
Fix for PR gdb/20684. When invoking MI commands with --thread and/or
--frame, the user selected thread and frame was not preserved:
(gdb)
info thread
&"info thread\n"
~" Id Target Id Frame \n"
~"* 1 Thread 0x7ffff7c30740 (LWP 19302) \"user-selected-c\" main () at /home/uuu/gdb/gdb/testsuite/gdb.mi/user-selected-context-sync.c:60\n"
~" 2 Thread 0x7ffff7c2f700 (LWP 19306) \"user-selected-c\" child_sub_function () at /home/uuu/gdb/gdb/testsuite/gdb.mi/user-selected-context-sync.c:30\n"
~" 3 Thread 0x7ffff742e700 (LWP 19307) \"user-selected-c\" child_sub_function () at /home/uuu/gdb/gdb/testsuite/gdb.mi/user-selected-context-sync.c:30\n"
^done
(gdb)
info frame
&"info frame\n"
~"Stack level 0, frame at 0x7fffffffdf90:\n"
~" rip = 0x555555555207 in main (/home/uuu/gdb/gdb/testsuite/gdb.mi/user-selected-context-sync.c:60); saved rip = 0x7ffff7c5709b\n"
~" source language c.\n"
~" Arglist at 0x7fffffffdf80, args: \n"
~" Locals at 0x7fffffffdf80, Previous frame's sp is 0x7fffffffdf90\n"
~" Saved registers:\n "
~" rbp at 0x7fffffffdf80, rip at 0x7fffffffdf88\n"
^done
(gdb)
-stack-info-depth --thread 3
^done,depth="4"
(gdb)
info thread
&"info thread\n"
~" Id Target Id Frame \n"
~" 1 Thread 0x7ffff7c30740 (LWP 19302) \"user-selected-c\" main () at /home/uuu/gdb/gdb/testsuite/gdb.mi/user-selected-context-sync.c:60\n"
~" 2 Thread 0x7ffff7c2f700 (LWP 19306) \"user-selected-c\" child_sub_function () at /home/uuu/gdb/gdb/testsuite/gdb.mi/user-selected-context-sync.c:30\n"
~"* 3 Thread 0x7ffff742e700 (LWP 19307) \"user-selected-c\" child_sub_function () at /home/uuu/gdb/gdb/testsuite/gdb.mi/user-selected-context-sync.c:30\n"
^done
(gdb)
info frame
&"info frame\n"
~"Stack level 0, frame at 0x7ffff742dee0:\n"
~" rip = 0x555555555169 in child_sub_function (/home/uuu/gdb/gdb/testsuite/gdb.mi/user-selected-context-sync.c:30); saved rip = 0x555555555188\n"
~" called by frame at 0x7ffff742df00\n"
~" source language c.\n"
~" Arglist at 0x7ffff742ded0, args: \n"
~" Locals at 0x7ffff742ded0, Previous frame's sp is 0x7ffff742dee0\n"
~" Saved registers:\n "
~" rbp at 0x7ffff742ded0, rip at 0x7ffff742ded8\n"
^done
(gdb)
This caused problems for frontends that provide access to CLI because UI
may silently change the context for CLI commands (as demonstrated above).
This commit fixes the problem by restoring thread and frame in
mi_cmd_execute (). With this change, there are only two GDB/MI commands
that can change user selected context: -thread-select and -stack-select-frame.
This allows us to remove all and rather complicated logic of notifying
about user selected context change from mi_execute_command (), leaving it
to these two commands themselves to notify.
Andrew Burgess [Fri, 25 Feb 2022 11:03:03 +0000 (11:03 +0000)]
gdb/testsuite: add new test for comparing char types in Python
There's an interesting property of the 'char' type in C and C++, the
three types 'char', 'unsigned char', and 'signed char', are all
considered distinct.
In contrast, and 'int' is signed by default, and so 'int' and 'signed
int' are considered the same type.
This commit adds a test to ensure that this edge case is visible to a
user from Python.
It is worth noting that for any particular compiler implementation (or
the flags a compiler was invoked with), a 'char' will be either signed
or unsigned; it has to be one or the other, and a user can access this
information by using the Type.is_signed property. However, for
something like function overload resolution, the 'char' type is
considered distinct from the signed and unsigned variants.
There's no change to GDB with this commit, this is just adding a new
test to guard some existing functionality.
Andrew Burgess [Tue, 30 Nov 2021 14:35:44 +0000 (14:35 +0000)]
gdb/python: add Type.is_signed property
Add a new read-only property, Type.is_signed, which is True for signed
types, and False otherwise.
This property should only be read on types for which Type.is_scalar is
true, attempting to read this property for non-scalar types will raise
a ValueError.
I chose 'is_signed' rather than 'is_unsigned' in order to match the
existing Architecture.integer_type method, which takes a 'signed'
parameter. As far as I could find, that was the only existing
signed/unsigned selector in the Python API, so it seemed reasonable to
stay consistent.
Andrew Burgess [Wed, 2 Mar 2022 11:11:47 +0000 (11:11 +0000)]
gdb/mi: add --no-connection to MI -add-inferior command
Following on from the previous commit, where the -add-inferior command
now uses the same connection as the current inferior, this commit adds
a --no-connection option to -add-inferior.
This new option matches the existing option of the same name for the
CLI version of add-inferior; the new inferior is created with no
connection.
I've added a new 'connection' field to the MI output of -add-inferior,
which includes the connection number and short name. I haven't
included the longer description field, this is the MI after all. My
expectation would be that if the frontend wanted to display all the
connection details then this would be looked up from 'info
connection' (or the MI equivalent if/when such a command is added).
The existing -add-inferior tests are updated, as are the docs.
When a new inferior was added using the MI -add-inferior command, the
new inferior would be using the same target as all the other
inferiors. This makes sense, GDB only supported a single target stack
at a time.
After the above commit, each inferior has its own target stack.
To maintain backward compatibility, for the CLI add-inferior command,
when a new inferior is added the above commit has the new inferior
inherit a copy of the target stack from the current inferior.
Unfortunately, this same backward compatibility is missing for the MI.
This commit fixes this oversight.
Now, when the -add-inferior MI command is used, the new inferior will
inherit a copy of the target stack from the current inferior.
Tom Tromey [Thu, 3 Mar 2022 16:47:00 +0000 (09:47 -0700)]
Deprecate dbx mode
GDB has a dbx emulation mode that adds a few aliases and helper
commands. This mode is barely documented and is very superficial
besides. I suspect it is rarely used, and I would like to propose
deprecating it for GDB 12, and then removing it in GDB 13.
Pedro Alves [Mon, 7 Mar 2022 16:09:41 +0000 (16:09 +0000)]
Remove unnecessary inferior lookup in infrun:handle_one
infrun.c:handle_one calls find_inferior_ptid unnecessarily, since we
already have a thread pointer handy, and the thread has a pointer to
the inferior. This commit removes the unnecessary lookup.
Tom Tromey [Wed, 16 Feb 2022 19:33:45 +0000 (12:33 -0700)]
Fix bug in ada_print_floating
ada_print_floating rewrites a floating-point string representation to
conform to Ada syntax. However, if you managed to get a floating
point error, you might see:
(gdb) print whatever
$2 = <invalid float valu.0e>
What's happening here is that ada_print_floating doesn't recognize
this error case, and proceeds to modify the error text.
Tom Tromey [Wed, 16 Feb 2022 17:07:18 +0000 (10:07 -0700)]
Implement real literal extension for Ada
Sometimes it is convenient to be able to specify the exact bits of a
floating-point literal. For example, you may want to set a
floating-point register to a denormalized value, or to a particular
NaN.
In C, you can do this by combining the "{}" cast with an array
literal, like:
This patch adds a somewhat similar idea to Ada. It extends the lexer
to allow "l" and "f" suffixes in a based literal. The "f" indicates a
floating-point literal, and the "l"s control the size of the
floating-point type.
Note that this differs from Ada's based real literals. I believe
those can also be used to control the bits of a floating-point value,
but they are a bit more cumbersome to use (simplest is binary but
that's also very lengthy). Also, these aren't implemented in GDB.
I chose not to allow this extension to work with based integer
literals with exponents. That didn't seem very useful.
Tom Tromey [Mon, 28 Feb 2022 20:42:03 +0000 (13:42 -0700)]
Fix gdb.ada/arrayptr.exp results
PR ada/28115 points out that gdb.ada/arrayptr.exp works with GNAT 12,
but fails with minimal encodings in earlier versions.
This patch updates the test to try to report the results correctly. I
tried this with the Fedora 34 system gcc (GCC 11) and with a GCC 12
built from git trunk sometime relatively recently.
Tom Tromey [Thu, 3 Feb 2022 17:42:07 +0000 (10:42 -0700)]
Handle non-ASCII identifiers in Ada
Ada allows non-ASCII identifiers, and GNAT supports several such
encodings. This patch adds the corresponding support to gdb.
GNAT encodes non-ASCII characters using special symbol names.
For character sets like Latin-1, where all characters are a single
byte, it uses a "U" followed by the hex for the character. So, for
example, thorn would be encoded as "Ufe" (0xFE being lower case
thorn).
For wider characters, despite what the manual says (it claims
Shift-JIS and EUC can be used), in practice recent versions only
support Unicode. Here, characters in the base plane are represented
using "Wxxxx" and characters outside the base plane using
"WWxxxxxxxx".
GNAT has some further quirks here. Ada is case-insensitive, and GNAT
emits symbols that have been case-folded. For characters in ASCII,
and for all characters in non-Unicode character sets, lower case is
used. For Unicode, however, characters that fit in a single byte are
converted to lower case, but all others are converted to upper case.
Furthermore, there is a bug in GNAT where two symbols that differ only
in the case of "Y WITH DIAERESIS" (and potentially others, I did not
check exhaustively) can be used in one program. I chose to omit
handling this case from gdb, on the theory that it is hard to figure
out the logic, and anyway if the bug is ever fixed, we'll regret
having a heuristic.
This patch introduces a new "ada source-charset" setting. It defaults
to Latin-1, as that is GNAT's default. This setting controls how "U"
characters are decoded -- W/WW are always handled as UTF-32.
The ada_tag_name_from_tsd change is needed because this function will
read memory from the inferior and interpret it -- and this caused an
encoding failure on PPC when running a test that tries to read
uninitialized memory.
This patch implements its own UTF-32-based case folder. This avoids
host platform quirks, and is relatively simple. A short Python
program to generate the case-folding table is included. It simply
relies on whatever version of Unicode is used by the host Python,
which seems basically acceptable.
Test cases for UTF-8, Latin-1, and Latin-3 are included. This
exercises most of the new code paths, aside from Y WITH DIAERESIS as
noted above.
Tom Tromey [Thu, 3 Feb 2022 19:04:36 +0000 (12:04 -0700)]
Define HOST_UTF32 in charset.h
rust-parse.c has a #define for the host-specific UTF-32 charset name.
A later patch needs the same thing, so this patch moves the definition
to charset.h for easier reuse.
Tom Tromey [Thu, 3 Feb 2022 20:18:25 +0000 (13:18 -0700)]
Let phex and phex_nz handle sizeof_l==1
Currently, neither phex nor phex_nz handle sizeof_l==1 -- they let
this case fall through to the default case. However, a subsequent
patch in this series needs this case to work correctly.
I looked at all calls to these functions that pass a 1 for the
sizeof_l parameter. The only such case seems to be correct with this
change.
Tom Tromey [Thu, 3 Feb 2022 19:24:12 +0000 (12:24 -0700)]
Don't pre-size result string in ada_decode
Currently, ada_decode pre-sizes the output string, filling it with 'X'
characters. However, it's a bit simpler and more flexible to let
std::string do the work here, and simply append characters to the
string as we go. This turns out to be useful for a subsequent patch.
MIPS/opcodes: Fix alias annotation for branch instructions
Correct issues with INSN2_ALIAS annotation for branch instructions:
- regular MIPS BEQZ/L and BNEZ/L assembly instructions are idioms for
BEQ/L and BNE/L respectively with the `rs' operand equal to $0,
- microMIPS 32-bit BEQZ and BNEZ assembly instructions are idioms for
BEQ and BNE respectively with the `rt' operand equal to $0,
- regular MIPS BAL assembly instruction is an idiom for architecture
levels of up to the MIPSr5 ISA and a machine instruction on its own
from the MIPSr6 ISA up.
Add missing annotation to BEQZ/L and BNEZ/L accordingly then and add a
new entry for BAL for the MIPSr6 ISA, correcting a disassembly bug:
Parts for regular MIPS BEQZ/L and BNEZ/L instructions from Sagar Patel.
2022-03-06 Maciej W. Rozycki <macro@orcam.me.uk>
binutils/
* testsuite/binutils-all/mips/mips1-branch-alias.d: New test.
* testsuite/binutils-all/mips/mips1-branch-noalias.d: New test.
* testsuite/binutils-all/mips/mips2-branch-alias.d: New test.
* testsuite/binutils-all/mips/mips2-branch-noalias.d: New test.
* testsuite/binutils-all/mips/mips32r6-branch-alias.d: New test.
* testsuite/binutils-all/mips/mips32r6-branch-noalias.d: New
test.
* testsuite/binutils-all/mips/micromips-branch-alias.d: New
test.
* testsuite/binutils-all/mips/micromips-branch-noalias.d: New
test.
* testsuite/binutils-all/mips/mips-branch-alias.s: New test
source.
* testsuite/binutils-all/mips/micromips-branch-alias.s: New test
source.
* testsuite/binutils-all/mips/mips.exp: Run the new tests.
2022-03-06 Sagar Patel <sagarmp@cs.unc.edu>
Maciej W. Rozycki <macro@orcam.me.uk>
opcodes/
* mips-opc.c (mips_builtin_opcodes): Fix INSN2_ALIAS annotation
for "bal", "beqz", "beqzl", "bnez" and "bnezl" instructions.
* micromips-opc.c (micromips_opcodes): Likewise for "beqz" and
"bnez" instructions.
Tom Tromey [Fri, 4 Mar 2022 03:25:32 +0000 (20:25 -0700)]
Use function view when iterating over block symbols
This changes iterate_over_block_local_vars and
iterate_over_block_arg_vars to take a gdb::function_view rather than a
function pointer and a user-data. In one spot, this allows us to
remove a helper structure and helper function. In another spot, this
looked more complicated, so I changed the helper function to be an
"operator()" -- also a simplification, just not as big.
Tom Tromey [Sat, 5 Mar 2022 00:14:44 +0000 (17:14 -0700)]
Simplify hppa-tdep.c use of objfile_key
I happened to notice a couple of unnecessary casts in hppa-tdep.c, and
then I saw that the use of objfile_key could be simplified -- removing
some code and using the default deleter rather than noop_deleter.
Simon Marchi [Mon, 31 Jan 2022 20:57:58 +0000 (15:57 -0500)]
gdb: constify parameter of value_copy
In a following patch, I have a const value I want to copy using a
value_copy. However, value_copy takes a non-const source value, at the
moment. Change the paramter to be const,
If the source value is not lazy, we currently call
value_contents_all_raw, which calls allocate_value_contents, to get a
view on the contents. They both take a non-const value, that's a
problem. My first attempt at solving it was to add a const version of
value_contents_all_raw, make allocate_value_contents take a const value,
and either:
- make value::contents mutable
- make allocate_value_contents cast away the const
The idea being that allocating the value contents buffer does modify the
value at the bit level, but logically that doesn't change its state.
That was getting a bit complicated, so what I ended up doing is make
value_copy not call value_contents_all_raw. We know at this point that
the value is not lazy, so value::contents must have been allocate
already.
Simon Marchi [Mon, 31 Jan 2022 20:23:32 +0000 (15:23 -0500)]
gdb: remove internalvar_funcs::destroy
No kind of internal var uses it remove it. This makes the transition to
using a variant easier, since we don't need to think about where this
should be called (in a destructor or not), if it can throw, etc.
gdb: Use a typedef's scoped type name to identify local typedefs
GDB prints the wrong type for typedefs in case there is another typedef
available for the same raw type (gdb/16040). The reason is that the
current hashmap based substitution mechanism always compares the target
type of a typedef and not its scoped name.
Roland McGrath [Wed, 2 Mar 2022 00:03:58 +0000 (16:03 -0800)]
Avoid conflict with gnulib open/close macros.
On some systems, the gnulib configuration will decide to define open
and/or close as macros to replace the POSIX C functions. This
interferes with using those names in C++ class or namespace scopes.
Tiezhu Yang [Thu, 3 Mar 2022 03:15:10 +0000 (11:15 +0800)]
gdb: testsuite: fix failed testcases in gdb.base/gdb-caching-proc.exp
When execute the following command:
make check-gdb TESTS="gdb.base/gdb-caching-proc.exp"
we can see there exist some failed testcases:
FAIL: gdb.base/gdb-caching-proc.exp: can_spawn_for_attach: 0: can spawn for attach (got interactive prompt)
FAIL: gdb.base/gdb-caching-proc.exp: can_spawn_for_attach: 1: can spawn for attach (got interactive prompt)
FAIL: gdb.base/gdb-caching-proc.exp: can_spawn_for_attach: 2: can spawn for attach (got interactive prompt)
FAIL: gdb.base/gdb-caching-proc.exp: can_spawn_for_attach: 3: can spawn for attach (got interactive prompt)
FAIL: gdb.base/gdb-caching-proc.exp: can_spawn_for_attach: 4: can spawn for attach (got interactive prompt)
FAIL: gdb.base/gdb-caching-proc.exp: can_spawn_for_attach: 5: can spawn for attach (got interactive prompt)
FAIL: gdb.base/gdb-caching-proc.exp: can_spawn_for_attach: 6: can spawn for attach (got interactive prompt)
FAIL: gdb.base/gdb-caching-proc.exp: can_spawn_for_attach: 7: can spawn for attach (got interactive prompt)
FAIL: gdb.base/gdb-caching-proc.exp: can_spawn_for_attach: 8: can spawn for attach (got interactive prompt)
FAIL: gdb.base/gdb-caching-proc.exp: can_spawn_for_attach: 9: can spawn for attach (got interactive prompt)
here are the detailed messages in gdb/testsuite/gdb.log:
attach 873776
A program is being debugged already. Kill it? (y or n) n
Not killed.
(gdb) FAIL: gdb.base/gdb-caching-proc.exp: can_spawn_for_attach: 0: can spawn for attach (got interactive prompt)
so handle the case "A program is being debugged already. Kill it" in
can_spawn_for_attach to fix the failed testcases.
Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
projects / thirdparty / binutils-gdb.git / log
