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This commit adds multi-target support to GDB. What this means is that
with this commit, GDB can now be connected to different targets at the
same time. E.g., you can debug a live native process and a core dump
at the same time, connect to multiple gdbservers, etc.
Actually, the word "target" is overloaded in gdb. We already have a
target stack, with pushes several target_ops instances on top of one
another. We also have "info target" already, which means something
completely different to what this patch does.
So from here on, I'll be using the "target connections" term, to mean
an open process_stratum target, pushed on a target stack. This patch
makes gdb have multiple target stacks, and multiple process_stratum
targets open simultaneously. The user-visible changes / commands will
also use this terminology, but of course it's all open to debate.
User-interface-wise, not that much changes. The main difference is
that each inferior may have its own target connection.
A target connection (e.g., a target extended-remote connection) may
support debugging multiple processes, just as before.
Say you're debugging against gdbserver in extended-remote mode, and
you do "add-inferior" to prepare to spawn a new process, like:
(gdb) target extended-remote :9999
...
(gdb) start
...
(gdb) add-inferior
Added inferior 2
(gdb) inferior 2
[Switching to inferior 2 [<null>] (<noexec>)]
(gdb) file a.out
...
(gdb) start
...
At this point, you have two inferiors connected to the same gdbserver.
With this commit, GDB will maintain a target stack per inferior,
instead of a global target stack.
To preserve the behavior above, by default, "add-inferior" makes the
new inferior inherit a copy of the target stack of the current
inferior. Same across a fork - the child inherits a copy of the
target stack of the parent. While the target stacks are copied, the
targets themselves are not. Instead, target_ops is made a
refcounted_object, which means that target_ops instances are
refcounted, which each inferior counting for a reference.
What if you want to create an inferior and connect it to some _other_
target? For that, this commit introduces a new "add-inferior
-no-connection" option that makes the new inferior not share the
current inferior's target. So you could do:
(gdb) target extended-remote :9999
Remote debugging using :9999
...
(gdb) add-inferior -no-connection
[New inferior 2]
Added inferior 2
(gdb) inferior 2
[Switching to inferior 2 [<null>] (<noexec>)]
(gdb) info inferiors
Num Description Executable
1 process 18401 target:/home/pedro/tmp/main
* 2 <null>
(gdb) tar extended-remote :10000
Remote debugging using :10000
...
(gdb) info inferiors
Num Description Executable
1 process 18401 target:/home/pedro/tmp/main
* 2 process 18450 target:/home/pedro/tmp/main
(gdb)
A following patch will extended "info inferiors" to include a column
indicating which connection an inferior is bound to, along with a
couple other UI tweaks.
Other than that, debugging is the same as before. Users interact with
inferiors and threads as before. The only difference is that
inferiors may be bound to processes running in different machines.
That's pretty much all there is to it in terms of noticeable UI
changes.
On to implementation.
Since we can be connected to different systems at the same time, a
ptid_t is no longer a unique identifier. Instead a thread can be
identified by a pair of ptid_t and 'process_stratum_target *', the
later being the instance of the process_stratum target that owns the
process/thread. Note that process_stratum_target inherits from
target_ops, and all process_stratum targets inherit from
process_stratum_target. In earlier patches, many places in gdb were
converted to refer to threads by thread_info pointer instead of
ptid_t, but there are still places in gdb where we start with a
pid/tid and need to find the corresponding inferior or thread_info
objects. So you'll see in the patch many places adding a
process_stratum_target parameter to functions that used to take only a
ptid_t.
Since each inferior has its own target stack now, we can always find
the process_stratum target for an inferior. That is done via a
inf->process_target() convenience method.
Since each inferior has its own target stack, we need to handle the
"beneath" calls when servicing target calls. The solution I settled
with is just to make sure to switch the current inferior to the
inferior you want before making a target call. Not relying on global
context is just not feasible in current GDB. Fortunately, there
aren't that many places that need to do that, because generally most
code that calls target methods already has the current context
pointing to the right inferior/thread. Note, to emphasize -- there's
no method to "switch to this target stack". Instead, you switch the
current inferior, and that implicitly switches the target stack.
In some spots, we need to iterate over all inferiors so that we reach
all target stacks.
Native targets are still singletons. There's always only a single
instance of such targets.
Remote targets however, we'll have one instance per remote connection.
The exec target is still a singleton. There's only one instance. I
did not see the point of instanciating more than one exec_target
object.
After vfork, we need to make sure to push the exec target on the new
inferior. See exec_on_vfork.
For type safety, functions that need a {target, ptid} pair to identify
a thread, take a process_stratum_target pointer for target parameter
instead of target_ops *. Some shared code in gdb/nat/ also need to
gain a target pointer parameter. This poses an issue, since gdbserver
doesn't have process_stratum_target, only target_ops. To fix this,
this commit renames gdbserver's target_ops to process_stratum_target.
I think this makes sense. There's no concept of target stack in
gdbserver, and gdbserver's target_ops really implements a
process_stratum-like target.
The thread and inferior iterator functions also gain
process_stratum_target parameters. These are used to be able to
iterate over threads and inferiors of a given target. Following usual
conventions, if the target pointer is null, then we iterate over
threads and inferiors of all targets.
I tried converting "add-inferior" to the gdb::option framework, as a
preparatory patch, but that stumbled on the fact that gdb::option does
not support file options yet, for "add-inferior -exec". I have a WIP
patchset that adds that, but it's not a trivial patch, mainly due to
need to integrate readline's filename completion, so I deferred that
to some other time.
In infrun.c/infcmd.c, the main change is that we need to poll events
out of all targets. See do_target_wait. Right after collecting an
event, we switch the current inferior to an inferior bound to the
target that reported the event, so that target methods can be used
while handling the event. This makes most of the code transparent to
multi-targets. See fetch_inferior_event.
infrun.c:stop_all_threads is interesting -- in this function we need
to stop all threads of all targets. What the function does is send an
asynchronous stop request to all threads, and then synchronously waits
for events, with target_wait, rinse repeat, until all it finds are
stopped threads. Now that we have multiple targets, it's not
efficient to synchronously block in target_wait waiting for events out
of one target. Instead, we implement a mini event loop, with
interruptible_select, select'ing on one file descriptor per target.
For this to work, we need to be able to ask the target for a waitable
file descriptor. Such file descriptors already exist, they are the
descriptors registered in the main event loop with add_file_handler,
inside the target_async implementations. This commit adds a new
target_async_wait_fd target method that just returns the file
descriptor in question. See wait_one / stop_all_threads in infrun.c.
The 'threads_executing' global is made a per-target variable. Since
it is only relevant to process_stratum_target targets, this is where
it is put, instead of in target_ops.
You'll notice that remote.c includes some FIXME notes. These refer to
the fact that the global arrays that hold data for the remote packets
supported are still globals. For example, if we connect to two
different servers/stubs, then each might support different remote
protocol features. They might even be different architectures, like
e.g., one ARM baremetal stub, and a x86 gdbserver, to debug a
host/controller scenario as a single program. That isn't going to
work correctly today, because of said globals. I'm leaving fixing
that for another pass, since it does not appear to be trivial, and I'd
rather land the base work first. It's already useful to be able to
debug multiple instances of the same server (e.g., a distributed
cluster, where you have full control over the servers installed), so I
think as is it's already reasonable incremental progress.
Current limitations:
- You can only resume more that one target at the same time if all
targets support asynchronous debugging, and support non-stop mode.
It should be possible to support mixed all-stop + non-stop
backends, but that is left for another time. This means that
currently in order to do multi-target with gdbserver you need to
issue "maint set target-non-stop on". I would like to make that
mode be the default, but we're not there yet. Note that I'm
talking about how the target backend works, only. User-visible
all-stop mode works just fine.
- As explained above, connecting to different remote servers at the
same time is likely to produce bad results if they don't support the
exact set of RSP features.
FreeBSD updates courtesy of John Baldwin.
gdb/ChangeLog:
2020-01-10 Pedro Alves <palves@redhat.com>
John Baldwin <jhb@FreeBSD.org>
* aarch64-linux-nat.c
(aarch64_linux_nat_target::thread_architecture): Adjust.
* ada-tasks.c (print_ada_task_info): Adjust find_thread_ptid call.
(task_command_1): Likewise.
* aix-thread.c (sync_threadlists, aix_thread_target::resume)
(aix_thread_target::wait, aix_thread_target::fetch_registers)
(aix_thread_target::store_registers)
(aix_thread_target::thread_alive): Adjust.
* amd64-fbsd-tdep.c: Include "inferior.h".
(amd64fbsd_get_thread_local_address): Pass down target.
* amd64-linux-nat.c (ps_get_thread_area): Use ps_prochandle
thread's gdbarch instead of target_gdbarch.
* break-catch-sig.c (signal_catchpoint_print_it): Adjust call to
get_last_target_status.
* break-catch-syscall.c (print_it_catch_syscall): Likewise.
* breakpoint.c (breakpoints_should_be_inserted_now): Consider all
inferiors.
(update_inserted_breakpoint_locations): Skip if inferiors with no
execution.
(update_global_location_list): When handling moribund locations,
find representative inferior for location's pspace, and use thread
count of its process_stratum target.
* bsd-kvm.c (bsd_kvm_target_open): Pass target down.
* bsd-uthread.c (bsd_uthread_target::wait): Use
as_process_stratum_target and adjust thread_change_ptid and
add_thread calls.
(bsd_uthread_target::update_thread_list): Use
as_process_stratum_target and adjust find_thread_ptid,
thread_change_ptid and add_thread calls.
* btrace.c (maint_btrace_packet_history_cmd): Adjust
find_thread_ptid call.
* corelow.c (add_to_thread_list): Adjust add_thread call.
(core_target_open): Adjust add_thread_silent and thread_count
calls.
(core_target::pid_to_str): Adjust find_inferior_ptid call.
* ctf.c (ctf_target_open): Adjust add_thread_silent call.
* event-top.c (async_disconnect): Pop targets from all inferiors.
* exec.c (add_target_sections): Push exec target on all inferiors
sharing the program space.
(remove_target_sections): Remove the exec target from all
inferiors sharing the program space.
(exec_on_vfork): New.
* exec.h (exec_on_vfork): Declare.
* fbsd-nat.c (fbsd_add_threads): Add fbsd_nat_target parameter.
Pass it down.
(fbsd_nat_target::update_thread_list): Adjust.
(fbsd_nat_target::resume): Adjust.
(fbsd_handle_debug_trap): Add fbsd_nat_target parameter. Pass it
down.
(fbsd_nat_target::wait, fbsd_nat_target::post_attach): Adjust.
* fbsd-tdep.c (fbsd_corefile_thread): Adjust
get_thread_arch_regcache call.
* fork-child.c (gdb_startup_inferior): Pass target down to
startup_inferior and set_executing.
* gdbthread.h (struct process_stratum_target): Forward declare.
(add_thread, add_thread_silent, add_thread_with_info)
(in_thread_list): Add process_stratum_target parameter.
(find_thread_ptid(inferior*, ptid_t)): New overload.
(find_thread_ptid, thread_change_ptid): Add process_stratum_target
parameter.
(all_threads()): Delete overload.
(all_threads, all_non_exited_threads): Add process_stratum_target
parameter.
(all_threads_safe): Use brace initialization.
(thread_count): Add process_stratum_target parameter.
(set_resumed, set_running, set_stop_requested, set_executing)
(threads_are_executing, finish_thread_state): Add
process_stratum_target parameter.
(switch_to_thread): Use is_current_thread.
* i386-fbsd-tdep.c: Include "inferior.h".
(i386fbsd_get_thread_local_address): Pass down target.
* i386-linux-nat.c (i386_linux_nat_target::low_resume): Adjust.
* inf-child.c (inf_child_target::maybe_unpush_target): Remove
have_inferiors check.
* inf-ptrace.c (inf_ptrace_target::create_inferior)
(inf_ptrace_target::attach): Adjust.
* infcall.c (run_inferior_call): Adjust.
* infcmd.c (run_command_1): Pass target to
scoped_finish_thread_state.
(proceed_thread_callback): Skip inferiors with no execution.
(continue_command): Rename 'all_threads' local to avoid hiding
'all_threads' function. Adjust get_last_target_status call.
(prepare_one_step): Adjust set_running call.
(signal_command): Use user_visible_resume_target. Compare thread
pointers instead of inferior_ptid.
(info_program_command): Adjust to pass down target.
(attach_command): Mark target's 'thread_executing' flag.
(stop_current_target_threads_ns): New, factored out from ...
(interrupt_target_1): ... this. Switch inferior before making
target calls.
* inferior-iter.h
(struct all_inferiors_iterator, struct all_inferiors_range)
(struct all_inferiors_safe_range)
(struct all_non_exited_inferiors_range): Filter on
process_stratum_target too. Remove explicit.
* inferior.c (inferior::inferior): Push dummy target on target
stack.
(find_inferior_pid, find_inferior_ptid, number_of_live_inferiors):
Add process_stratum_target parameter, and pass it down.
(have_live_inferiors): Adjust.
(switch_to_inferior_and_push_target): New.
(add_inferior_command, clone_inferior_command): Handle
"-no-connection" parameter. Use
switch_to_inferior_and_push_target.
(_initialize_inferior): Mention "-no-connection" option in
the help of "add-inferior" and "clone-inferior" commands.
* inferior.h: Include "process-stratum-target.h".
(interrupt_target_1): Use bool.
(struct inferior) <push_target, unpush_target, target_is_pushed,
find_target_beneath, top_target, process_target, target_at,
m_stack>: New.
(discard_all_inferiors): Delete.
(find_inferior_pid, find_inferior_ptid, number_of_live_inferiors)
(all_inferiors, all_non_exited_inferiors): Add
process_stratum_target parameter.
* infrun.c: Include "gdb_select.h" and <unordered_map>.
(target_last_proc_target): New global.
(follow_fork_inferior): Push target on new inferior. Pass target
to add_thread_silent. Call exec_on_vfork. Handle target's
reference count.
(follow_fork): Adjust get_last_target_status call. Also consider
target.
(follow_exec): Push target on new inferior.
(struct execution_control_state) <target>: New field.
(user_visible_resume_target): New.
(do_target_resume): Call target_async.
(resume_1): Set target's threads_executing flag. Consider resume
target.
(commit_resume_all_targets): New.
(proceed): Also consider resume target. Skip threads of inferiors
with no execution. Commit resumtion in all targets.
(start_remote): Pass current inferior to wait_for_inferior.
(infrun_thread_stop_requested): Consider target as well. Pass
thread_info pointer to clear_inline_frame_state instead of ptid.
(infrun_thread_thread_exit): Consider target as well.
(random_pending_event_thread): New inferior parameter. Use it.
(do_target_wait): Rename to ...
(do_target_wait_1): ... this. Add inferior parameter, and pass it
down.
(threads_are_resumed_pending_p, do_target_wait): New.
(prepare_for_detach): Adjust calls.
(wait_for_inferior): New inferior parameter. Handle it. Use
do_target_wait_1 instead of do_target_wait.
(fetch_inferior_event): Adjust. Switch to representative
inferior. Pass target down.
(set_last_target_status): Add process_stratum_target parameter.
Save target in global.
(get_last_target_status): Add process_stratum_target parameter and
handle it.
(nullify_last_target_wait_ptid): Clear 'target_last_proc_target'.
(context_switch): Check inferior_ptid == null_ptid before calling
inferior_thread().
(get_inferior_stop_soon): Pass down target.
(wait_one): Rename to ...
(poll_one_curr_target): ... this.
(struct wait_one_event): New.
(wait_one): New.
(stop_all_threads): Adjust.
(handle_no_resumed, handle_inferior_event): Adjust to consider the
event's target.
(switch_back_to_stepped_thread): Also consider target.
(print_stop_event): Update.
(normal_stop): Update. Also consider the resume target.
* infrun.h (wait_for_inferior): Remove declaration.
(user_visible_resume_target): New declaration.
(get_last_target_status, set_last_target_status): New
process_stratum_target parameter.
* inline-frame.c (clear_inline_frame_state(ptid_t)): Add
process_stratum_target parameter, and use it.
(clear_inline_frame_state (thread_info*)): New.
* inline-frame.c (clear_inline_frame_state(ptid_t)): Add
process_stratum_target parameter.
(clear_inline_frame_state (thread_info*)): Declare.
* linux-fork.c (delete_checkpoint_command): Pass target down to
find_thread_ptid.
(checkpoint_command): Adjust.
* linux-nat.c (linux_nat_target::follow_fork): Switch to thread
instead of just tweaking inferior_ptid.
(linux_nat_switch_fork): Pass target down to thread_change_ptid.
(exit_lwp): Pass target down to find_thread_ptid.
(attach_proc_task_lwp_callback): Pass target down to
add_thread/set_running/set_executing.
(linux_nat_target::attach): Pass target down to
thread_change_ptid.
(get_detach_signal): Pass target down to find_thread_ptid.
Consider last target status's target.
(linux_resume_one_lwp_throw, resume_lwp)
(linux_handle_syscall_trap, linux_handle_extended_wait, wait_lwp)
(stop_wait_callback, save_stop_reason, linux_nat_filter_event)
(linux_nat_wait_1, resume_stopped_resumed_lwps): Pass target down.
(linux_nat_target::async_wait_fd): New.
(linux_nat_stop_lwp, linux_nat_target::thread_address_space): Pass
target down.
* linux-nat.h (linux_nat_target::async_wait_fd): Declare.
* linux-tdep.c (get_thread_arch_regcache): Pass target down.
* linux-thread-db.c (struct thread_db_info::process_target): New
field.
(add_thread_db_info): Save target.
(get_thread_db_info): New process_stratum_target parameter. Also
match target.
(delete_thread_db_info): New process_stratum_target parameter.
Also match target.
(thread_from_lwp): Adjust to pass down target.
(thread_db_notice_clone): Pass down target.
(check_thread_db_callback): Pass down target.
(try_thread_db_load_1): Always push the thread_db target.
(try_thread_db_load, record_thread): Pass target down.
(thread_db_target::detach): Pass target down. Always unpush the
thread_db target.
(thread_db_target::wait, thread_db_target::mourn_inferior): Pass
target down. Always unpush the thread_db target.
(find_new_threads_callback, thread_db_find_new_threads_2)
(thread_db_target::update_thread_list): Pass target down.
(thread_db_target::pid_to_str): Pass current inferior down.
(thread_db_target::get_thread_local_address): Pass target down.
(thread_db_target::resume, maintenance_check_libthread_db): Pass
target down.
* nto-procfs.c (nto_procfs_target::update_thread_list): Adjust.
* procfs.c (procfs_target::procfs_init_inferior): Declare.
(proc_set_current_signal, do_attach, procfs_target::wait): Adjust.
(procfs_init_inferior): Rename to ...
(procfs_target::procfs_init_inferior): ... this and adjust.
(procfs_target::create_inferior, procfs_notice_thread)
(procfs_do_thread_registers): Adjust.
* ppc-fbsd-tdep.c: Include "inferior.h".
(ppcfbsd_get_thread_local_address): Pass down target.
* proc-service.c (ps_xfer_memory): Switch current inferior and
program space as well.
(get_ps_regcache): Pass target down.
* process-stratum-target.c
(process_stratum_target::thread_address_space)
(process_stratum_target::thread_architecture): Pass target down.
* process-stratum-target.h
(process_stratum_target::threads_executing): New field.
(as_process_stratum_target): New.
* ravenscar-thread.c
(ravenscar_thread_target::update_inferior_ptid): Pass target down.
(ravenscar_thread_target::wait, ravenscar_add_thread): Pass target
down.
* record-btrace.c (record_btrace_target::info_record): Adjust.
(record_btrace_target::record_method)
(record_btrace_target::record_is_replaying)
(record_btrace_target::fetch_registers)
(get_thread_current_frame_id, record_btrace_target::resume)
(record_btrace_target::wait, record_btrace_target::stop): Pass
target down.
* record-full.c (record_full_wait_1): Switch to event thread.
Pass target down.
* regcache.c (regcache::regcache)
(get_thread_arch_aspace_regcache, get_thread_arch_regcache): Add
process_stratum_target parameter and handle it.
(current_thread_target): New global.
(get_thread_regcache): Add process_stratum_target parameter and
handle it. Switch inferior before calling target method.
(get_thread_regcache): Pass target down.
(get_thread_regcache_for_ptid): Pass target down.
(registers_changed_ptid): Add process_stratum_target parameter and
handle it.
(registers_changed_thread, registers_changed): Pass target down.
(test_get_thread_arch_aspace_regcache): New.
(current_regcache_test): Define a couple local test_target_ops
instances and use them for testing.
(readwrite_regcache): Pass process_stratum_target parameter.
(cooked_read_test, cooked_write_test): Pass mock_target down.
* regcache.h (get_thread_regcache, get_thread_arch_regcache)
(get_thread_arch_aspace_regcache): Add process_stratum_target
parameter.
(regcache::target): New method.
(regcache::regcache, regcache::get_thread_arch_aspace_regcache)
(regcache::registers_changed_ptid): Add process_stratum_target
parameter.
(regcache::m_target): New field.
(registers_changed_ptid): Add process_stratum_target parameter.
* remote.c (remote_state::supports_vCont_probed): New field.
(remote_target::async_wait_fd): New method.
(remote_unpush_and_throw): Add remote_target parameter.
(get_current_remote_target): Adjust.
(remote_target::remote_add_inferior): Push target.
(remote_target::remote_add_thread)
(remote_target::remote_notice_new_inferior)
(get_remote_thread_info): Pass target down.
(remote_target::update_thread_list): Skip threads of inferiors
bound to other targets. (remote_target::close): Don't discard
inferiors. (remote_target::add_current_inferior_and_thread)
(remote_target::process_initial_stop_replies)
(remote_target::start_remote)
(remote_target::remote_serial_quit_handler): Pass down target.
(remote_target::remote_unpush_target): New remote_target
parameter. Unpush the target from all inferiors.
(remote_target::remote_unpush_and_throw): New remote_target
parameter. Pass it down.
(remote_target::open_1): Check whether the current inferior has
execution instead of checking whether any inferior is live. Pass
target down.
(remote_target::remote_detach_1): Pass down target. Use
remote_unpush_target.
(extended_remote_target::attach): Pass down target.
(remote_target::remote_vcont_probe): Set supports_vCont_probed.
(remote_target::append_resumption): Pass down target.
(remote_target::append_pending_thread_resumptions)
(remote_target::remote_resume_with_hc, remote_target::resume)
(remote_target::commit_resume): Pass down target.
(remote_target::remote_stop_ns): Check supports_vCont_probed.
(remote_target::interrupt_query)
(remote_target::remove_new_fork_children)
(remote_target::check_pending_events_prevent_wildcard_vcont)
(remote_target::remote_parse_stop_reply)
(remote_target::process_stop_reply): Pass down target.
(first_remote_resumed_thread): New remote_target parameter. Pass
it down.
(remote_target::wait_as): Pass down target.
(unpush_and_perror): New remote_target parameter. Pass it down.
(remote_target::readchar, remote_target::remote_serial_write)
(remote_target::getpkt_or_notif_sane_1)
(remote_target::kill_new_fork_children, remote_target::kill): Pass
down target.
(remote_target::mourn_inferior): Pass down target. Use
remote_unpush_target.
(remote_target::core_of_thread)
(remote_target::remote_btrace_maybe_reopen): Pass down target.
(remote_target::pid_to_exec_file)
(remote_target::thread_handle_to_thread_info): Pass down target.
(remote_target::async_wait_fd): New.
* riscv-fbsd-tdep.c: Include "inferior.h".
(riscv_fbsd_get_thread_local_address): Pass down target.
* sol2-tdep.c (sol2_core_pid_to_str): Pass down target.
* sol-thread.c (sol_thread_target::wait, ps_lgetregs, ps_lsetregs)
(ps_lgetfpregs, ps_lsetfpregs, sol_update_thread_list_callback):
Adjust.
* solib-spu.c (spu_skip_standalone_loader): Pass down target.
* solib-svr4.c (enable_break): Pass down target.
* spu-multiarch.c (parse_spufs_run): Pass down target.
* spu-tdep.c (spu2ppu_sniffer): Pass down target.
* target-delegates.c: Regenerate.
* target.c (g_target_stack): Delete.
(current_top_target): Return the current inferior's top target.
(target_has_execution_1): Refer to the passed-in inferior's top
target.
(target_supports_terminal_ours): Check whether the initial
inferior was already created.
(decref_target): New.
(target_stack::push): Incref/decref the target.
(push_target, push_target, unpush_target): Adjust.
(target_stack::unpush): Defref target.
(target_is_pushed): Return bool. Adjust to refer to the current
inferior's target stack.
(dispose_inferior): Delete, and inline parts ...
(target_preopen): ... here. Only dispose of the current inferior.
(target_detach): Hold strong target reference while detaching.
Pass target down.
(target_thread_name): Add assertion.
(target_resume): Pass down target.
(target_ops::beneath, find_target_at): Adjust to refer to the
current inferior's target stack.
(get_dummy_target): New.
(target_pass_ctrlc): Pass the Ctrl-C to the first inferior that
has a thread running.
(initialize_targets): Rename to ...
(_initialize_target): ... this.
* target.h: Include "gdbsupport/refcounted-object.h".
(struct target_ops): Inherit refcounted_object.
(target_ops::shortname, target_ops::longname): Make const.
(target_ops::async_wait_fd): New method.
(decref_target): Declare.
(struct target_ops_ref_policy): New.
(target_ops_ref): New typedef.
(get_dummy_target): Declare function.
(target_is_pushed): Return bool.
* thread-iter.c (all_matching_threads_iterator::m_inf_matches)
(all_matching_threads_iterator::all_matching_threads_iterator):
Handle filter target.
* thread-iter.h (struct all_matching_threads_iterator, struct
all_matching_threads_range, class all_non_exited_threads_range):
Filter by target too. Remove explicit.
* thread.c (threads_executing): Delete.
(inferior_thread): Pass down current inferior.
(clear_thread_inferior_resources): Pass down thread pointer
instead of ptid_t.
(add_thread_silent, add_thread_with_info, add_thread): Add
process_stratum_target parameter. Use it for thread and inferior
searches.
(is_current_thread): New.
(thread_info::deletable): Use it.
(find_thread_ptid, thread_count, in_thread_list)
(thread_change_ptid, set_resumed, set_running): New
process_stratum_target parameter. Pass it down.
(set_executing): New process_stratum_target parameter. Pass it
down. Adjust reference to 'threads_executing'.
(threads_are_executing): New process_stratum_target parameter.
Adjust reference to 'threads_executing'.
(set_stop_requested, finish_thread_state): New
process_stratum_target parameter. Pass it down.
(switch_to_thread): Also match inferior.
(switch_to_thread): New process_stratum_target parameter. Pass it
down.
(update_threads_executing): Reimplement.
* top.c (quit_force): Pop targets from all inferior.
(gdb_init): Don't call initialize_targets.
* windows-nat.c (windows_nat_target) <get_windows_debug_event>:
Declare.
(windows_add_thread, windows_delete_thread): Adjust.
(get_windows_debug_event): Rename to ...
(windows_nat_target::get_windows_debug_event): ... this. Adjust.
* tracefile-tfile.c (tfile_target_open): Pass down target.
* gdbsupport/common-gdbthread.h (struct process_stratum_target):
Forward declare.
(switch_to_thread): Add process_stratum_target parameter.
* mi/mi-interp.c (mi_on_resume_1): Add process_stratum_target
parameter. Use it.
(mi_on_resume): Pass target down.
* nat/fork-inferior.c (startup_inferior): Add
process_stratum_target parameter. Pass it down.
* nat/fork-inferior.h (startup_inferior): Add
process_stratum_target parameter.
* python/py-threadevent.c (py_get_event_thread): Pass target down.
gdb/gdbserver/ChangeLog:
2020-01-10 Pedro Alves <palves@redhat.com>
* fork-child.c (post_fork_inferior): Pass target down to
startup_inferior.
* inferiors.c (switch_to_thread): Add process_stratum_target
parameter.
* lynx-low.c (lynx_target_ops): Now a process_stratum_target.
* nto-low.c (nto_target_ops): Now a process_stratum_target.
* linux-low.c (linux_target_ops): Now a process_stratum_target.
* remote-utils.c (prepare_resume_reply): Pass the target to
switch_to_thread.
* target.c (the_target): Now a process_stratum_target.
(done_accessing_memory): Pass the target to switch_to_thread.
(set_target_ops): Ajust to use process_stratum_target.
* target.h (struct target_ops): Rename to ...
(struct process_stratum_target): ... this.
(the_target, set_target_ops): Adjust.
(prepare_to_access_memory): Adjust comment.
* win32-low.c (child_xfer_memory): Adjust to use
process_stratum_target.
(win32_target_ops): Now a process_stratum_target.
|
|
gdb/ChangeLog:
Update copyright year range in all GDB files.
|
|
Converts the int globals to bool.
gdb/gdbserver/ChangeLog:
2019-10-02 Christian Biesinger <cbiesinger@google.com>
* server.c (server_waiting): Change to bool.
(extended_protocol): Likewise.
(response_needed): Likewise.
(exit_requested): Likewise.
(run_once): Likewise.
(report_no_resumed): Likewise.
(non_stop): Likewise.
(disable_packet_vCont): Likewise.
(disable_packet_Tthread): Likewise.
(disable_packet_qC): Likewise.
(disable_packet_qfThreadInfo): Likewise.
(handle_general_set): Update.
(handle_detach): Update.
(handle_monitor_command): Update.
(handle_query): Update.
(captured_main): Update.
(process_serial_event): Update.
* server.h (server_waiting): Change to bool.
(disable_packet_vCont): Likewise.
(disable_packet_Tthread): Likewise.
(disable_packet_qC): Likewise.
(disable_packet_qfThreadInfo): Likewise.
(run_once): Likewise.
(non_stop): Likewise.
* target.c (target_stop_and_wait): Update.
|
|
Pedro pointed out that target_write_memory should use gdb::byte_vector
rather than std::vector<unsigned char>.
gdb/gdbserver/ChangeLog
2019-08-15 Tom Tromey <tromey@adacore.com>
* target.c (target_write_memory): Use gdb::byte_vector.
|
|
target_write_memory is just a simple wrapper for
write_inferior_memory. Because target_write_memory is needed for
gdbsupport, and because gdb uses the name "target_write_memory"
everywhere, this patch renames write_inferior_memory and removes the
wrapper. I think this brings gdb and gdbserver slightly more in sync.
gdb/gdbserver/ChangeLog
2019-08-15 Tom Tromey <tromey@adacore.com>
* tracepoint.c (write_inferior_data_pointer)
(write_inferior_integer, write_inferior_int8)
(write_inferior_uinteger, m_tracepoint_action_download)
(r_tracepoint_action_download, x_tracepoint_action_download)
(l_tracepoint_action_download, clear_inferior_trace_buffer)
(download_agent_expr, download_tracepoint_1)
(download_trace_state_variables, upload_fast_traceframes): Update.
* server.c (gdb_write_memory): Update.
* remote-utils.c (relocate_instruction): Update.
* proc-service.c (ps_pdwrite): Update.
* mem-break.c (remove_memory_breakpoint)
(delete_fast_tracepoint_jump, set_fast_tracepoint_jump)
(uninsert_fast_tracepoint_jumps_at)
(reinsert_fast_tracepoint_jumps_at): Update.
* linux-x86-low.c (append_insns)
(i386_install_fast_tracepoint_jump_pad)
(amd64_write_goto_address, i386_write_goto_address): Update.
* linux-s390-low.c (append_insns, s390_write_goto_address):
Update.
* linux-ppc-low.c (ppc_relocate_instruction)
(ppc_install_fast_tracepoint_jump_pad, emit_insns)
(ppc_write_goto_address): Update.
* linux-aarch64-low.c (append_insns): Update.
* target.h (struct target_ops): Update.
(write_inferior_memory): Don't declare.
* target.c (target_write_memory): Rename from
write_inferior_memory. Remove old target_write_memory.
|
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gdbserver's write_inferior_memory uses a static variable to avoid
memory leaks, and has a comment referring to the lack of cleanups.
This patch removes this comment and the code in favor of a
straightforward use of std::vector.
gdb/gdbserver/ChangeLog
2019-08-15 Tom Tromey <tromey@adacore.com>
* target.c (write_inferior_memory): Use std::vector.
|
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This commit applies all changes made after running the gdb/copyright.py
script.
Note that one file was flagged by the script, due to an invalid
copyright header
(gdb/unittests/basic_string_view/element_access/char/empty.cc).
As the file was copied from GCC's libstdc++-v3 testsuite, this commit
leaves this file untouched for the time being; a patch to fix the header
was sent to gcc-patches first.
gdb/ChangeLog:
Update copyright year range in all GDB files.
|
|
We start from a process_info pointer, pass down process->pid, and
then the target_kill implementations need to find the process from the
pid again. Pass the process_info pointer down directly instead.
gdb/gdbserver/ChangeLog:
2018-07-13 Pedro Alves <palves@redhat.com>
* linux-low.c (linux_kill): Change parameter to process_info
pointer instead of pid. Adjust.
* lynx-low.c (lynx_kill): Likewise.
* nto-low.c (nto_kill): Likewise.
* spu-low.c (spu_kill): Likewise.
* win32-low.c (win32_kill): Likewise.
* server.c (handle_v_kill, kill_inferior_callback)
(detach_or_kill_for_exit): Adjust.
* target.c (kill_inferior): Change parameter to process_info
pointer instead of pid. Adjust.
* target.h (struct target_ops) <kill>: Change parameter to
process_info pointer instead of pid. Adjust all implementations
and callers.
(kill_inferior): Likewise.
|
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Remove ptid_equal in favor of using "==".
gdb/ChangeLog
2018-07-03 Tom Tromey <tom@tromey.com>
* common/ptid.c (ptid_equal): Remove.
* common/ptid.h (ptid_equal): Don't declare.
* ada-tasks.c: Update.
* breakpoint.c: Update.
* common/agent.c: Update.
* corelow.c: Update.
* darwin-nat-info.c: Update.
* darwin-nat.c: Update.
* dcache.c: Update.
* dtrace-probe.c: Update.
* dummy-frame.c: Update.
* fbsd-nat.c: Update.
* frame.c: Update.
* gdbthread.h: Update.
* gnu-nat.c: Update.
* go32-nat.c: Update.
* inf-loop.c: Update.
* inf-ptrace.c: Update.
* infcall.c: Update.
* infcmd.c: Update.
* inflow.c: Update.
* infrun.c: Update.
* linux-fork.c: Update.
* linux-nat.c: Update.
* linux-thread-db.c: Update.
* mi/mi-cmd-var.c: Update.
* mi/mi-interp.c: Update.
* mi/mi-main.c: Update.
* nto-procfs.c: Update.
* ppc-linux-tdep.c: Update.
* procfs.c: Update.
* python/py-inferior.c: Update.
* python/py-record-btrace.c: Update.
* python/py-record.c: Update.
* ravenscar-thread.c: Update.
* regcache.c: Update.
* remote-sim.c: Update.
* remote.c: Update.
* sol-thread.c: Update.
* solib.c: Update.
* target.c: Update.
* tui/tui-stack.c: Update.
* varobj.c: Update.
* windows-nat.c: Update.
* windows-tdep.c: Update.
gdb/gdbserver/ChangeLog
2018-07-03 Tom Tromey <tom@tromey.com>
* linux-low.c: Update.
* lynx-low.c: Update.
* mem-break.c: Update.
* nto-low.c: Update.
* remote-utils.c: Update.
* server.c: Update.
* spu-low.c: Update.
* target.c: Update.
* win32-low.c: Update.
|
|
This removes ptid_get_tid in favor of calling the ptid_t::tid method.
gdb/ChangeLog
2018-07-03 Tom Tromey <tom@tromey.com>
* common/ptid.c (ptid_get_tid): Remove.
* common/ptid.h (ptid_get_tid): Don't declare.
* ada-tasks.c: Update.
* aix-thread.c: Update.
* bsd-uthread.c: Update.
* darwin-nat.c: Update.
* fbsd-nat.c: Update.
* i386-darwin-nat.c: Update.
* infrun.c: Update.
* linux-tdep.c: Update.
* nto-procfs.c: Update.
* ppc-ravenscar-thread.c: Update.
* python/py-infthread.c: Update.
* ravenscar-thread.c: Update.
* sol-thread.c: Update.
* sparc-ravenscar-thread.c: Update.
* windows-nat.c: Update.
gdb/gdbserver/ChangeLog
2018-07-03 Tom Tromey <tom@tromey.com>
* target.c: Update.
|
|
This removes ptid_get_lwp in favor of calling the ptid_t::lwp method.
gdb/ChangeLog
2018-07-03 Tom Tromey <tom@tromey.com>
* common/ptid.c (ptid_get_lwp): Remove.
* common/ptid.h (ptid_get_lwp): Don't declare.
* aarch64-linux-nat.c: Update.
* ada-tasks.c: Update.
* aix-thread.c: Update.
* amd64-linux-nat.c: Update.
* arm-linux-nat.c: Update.
* corelow.c: Update.
* fbsd-nat.c: Update.
* fbsd-tdep.c: Update.
* gnu-nat.c: Update.
* i386-cygwin-tdep.c: Update.
* i386-gnu-nat.c: Update.
* i386-linux-nat.c: Update.
* ia64-linux-nat.c: Update.
* inf-ptrace.c: Update.
* infrun.c: Update.
* linux-fork.c: Update.
* linux-nat.c: Update.
* linux-tdep.c: Update.
* linux-thread-db.c: Update.
* mips-linux-nat.c: Update.
* nat/aarch64-linux-hw-point.c: Update.
* nat/aarch64-linux.c: Update.
* nat/linux-btrace.c: Update.
* nat/linux-osdata.c: Update.
* nat/linux-procfs.c: Update.
* nat/x86-linux-dregs.c: Update.
* obsd-nat.c: Update.
* ppc-fbsd-nat.c: Update.
* ppc-linux-nat.c: Update.
* procfs.c: Update.
* python/py-infthread.c: Update.
* ravenscar-thread.c: Update.
* remote.c: Update.
* s390-linux-nat.c: Update.
* sol-thread.c: Update.
* sol2-tdep.c: Update.
* spu-linux-nat.c: Update.
* x86-linux-nat.c: Update.
* xtensa-linux-nat.c: Update.
gdb/gdbserver/ChangeLog
2018-07-03 Tom Tromey <tom@tromey.com>
* linux-low.c: Update.
* linux-mips-low.c: Update.
* lynx-low.c: Update.
* nto-low.c: Update.
* remote-utils.c: Update.
* server.c: Update.
* spu-low.c: Update.
* target.c: Update.
* thread-db.c: Update.
|
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This removes ptid_get_pid in favor of calling the ptid_t::pid method.
gdb/ChangeLog
2018-07-03 Tom Tromey <tom@tromey.com>
* common/ptid.c (ptid_get_pid): Remove.
* common/ptid.h (ptid_get_pid): Don't declare.
* aarch64-linux-nat.c: Update.
* ada-lang.c: Update.
* aix-thread.c: Update.
* alpha-bsd-nat.c: Update.
* amd64-fbsd-nat.c: Update.
* amd64-linux-nat.c: Update.
* arm-linux-nat.c: Update.
* arm-nbsd-nat.c: Update.
* auxv.c: Update.
* break-catch-syscall.c: Update.
* breakpoint.c: Update.
* bsd-uthread.c: Update.
* corelow.c: Update.
* ctf.c: Update.
* darwin-nat.c: Update.
* fbsd-nat.c: Update.
* fbsd-tdep.c: Update.
* gcore.c: Update.
* gnu-nat.c: Update.
* hppa-nbsd-nat.c: Update.
* hppa-obsd-nat.c: Update.
* i386-fbsd-nat.c: Update.
* ia64-linux-nat.c: Update.
* inf-ptrace.c: Update.
* infcmd.c: Update.
* inferior.c: Update.
* inferior.h: Update.
* inflow.c: Update.
* infrun.c: Update.
* linux-fork.c: Update.
* linux-nat.c: Update.
* linux-tdep.c: Update.
* linux-thread-db.c: Update.
* m68k-bsd-nat.c: Update.
* mi/mi-interp.c: Update.
* mi/mi-main.c: Update.
* mips-linux-nat.c: Update.
* mips-nbsd-nat.c: Update.
* mips64-obsd-nat.c: Update.
* nat/aarch64-linux-hw-point.c: Update.
* nat/aarch64-linux.c: Update.
* nat/linux-btrace.c: Update.
* nat/linux-osdata.c: Update.
* nat/linux-procfs.c: Update.
* nat/x86-linux-dregs.c: Update.
* nto-procfs.c: Update.
* obsd-nat.c: Update.
* ppc-linux-nat.c: Update.
* ppc-nbsd-nat.c: Update.
* ppc-obsd-nat.c: Update.
* proc-service.c: Update.
* procfs.c: Update.
* python/py-inferior.c: Update.
* python/py-infthread.c: Update.
* ravenscar-thread.c: Update.
* record.c: Update.
* remote-sim.c: Update.
* remote.c: Update.
* rs6000-nat.c: Update.
* s390-linux-nat.c: Update.
* sh-nbsd-nat.c: Update.
* sol-thread.c: Update.
* sparc-nat.c: Update.
* sparc64-tdep.c: Update.
* spu-linux-nat.c: Update.
* spu-tdep.c: Update.
* target-debug.h: Update.
* target.c: Update.
* thread.c: Update.
* tid-parse.c: Update.
* tracefile-tfile.c: Update.
* vax-bsd-nat.c: Update.
* windows-nat.c: Update.
* x86-linux-nat.c: Update.
* x86-nat.c: Update.
gdb/gdbserver/ChangeLog
2018-07-03 Tom Tromey <tom@tromey.com>
* linux-low.c: Update.
* linux-mips-low.c: Update.
* lynx-low.c: Update.
* mem-break.c: Update.
* nto-low.c: Update.
* remote-utils.c: Update.
* server.c: Update.
* spu-low.c: Update.
* target.c: Update.
* tracepoint.c: Update.
|
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Collect per client specific global data items into struct client_state,
which is similar in purpose to remote.c::remote_state.
gdbserver/ChangeLog
* server.h (struct client_state): New.
* server.c (cont_thread, general_thread, multi_process)
(report_fork_events, report_vfork_events, report_exec_events)
(report_thread_events, swbreak_feature, hwbreak_feature)
(vCont_supported, disable_randomization, pass_signals)
(program_signals, program_signals_p, last_status, last_ptid, own_buf):
Moved to client_state.
* remote-utils.c (remote_debug, noack_mode)
(transport_is_reliable): Moved to client_state.
* tracepoint.c (current_traceframe): Moved to client_state.
Update all callers.
* server.c, remote-utils.c, tracepoint.c, fork-child.c,
linux-low.c, remote-utils.h, target.c: Use client_state.
|
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In my multi-target branch I ran into problems with GDB's terminal
handling that exist in master as well, with multi-inferior debugging.
This patch adds a testcase for said problems
(gdb.multi/multi-term-settings.exp), fixes the problems, fixes PR
gdb/13211 as well (and adds a testcase for that too,
gdb.base/interrupt-daemon.exp).
The basis of the problem I ran into is the following. Consider a
scenario where you have:
- inferior 1 - started with "attach", process is running on some
other terminal.
- inferior 2 - started with "run", process is sharing gdb's terminal.
In this scenario, when you stop/resume both inferiors, you want GDB to
save/restore the terminal settings of inferior 2, the one that is
sharing GDB's terminal. I.e., you want inferior 2 to "own" the
terminal (in target_terminal::is_ours/target_terminal::is_inferior
sense).
Unfortunately, that's not what you get currently. Because GDB doesn't
know whether an attached inferior is actually sharing GDB's terminal,
it tries to save/restore its settings anyway, ignoring errors. In
this case, this is pointless, because inferior 1 is running on a
different terminal, but GDB doesn't know better.
And then, because it is only possible to have the terminal settings of
a single inferior be in effect at a time, or make one inferior/pgrp be
the terminal's foreground pgrp (aka, only one inferior can "own" the
terminal, ignoring fork children here), if GDB happens to try to
restore the terminal settings of inferior 1 first, then GDB never
restores the terminal settings of inferior 2.
This patch fixes that and a few things more along the way:
- Moves enum target_terminal::terminal_state out of the
target_terminal class (it's currently private) and makes it a
scoped enum so that it can be easily used elsewhere.
- Replaces the inflow.c:terminal_is_ours boolean with a
target_terminal_state variable. This allows distinguishing is_ours
and is_ours_for_output states. This allows finally making
child_terminal_ours_1 do something with its "output_only"
parameter.
- Makes each inferior have its own copy of the
is_ours/is_ours_for_output/is_inferior state.
- Adds a way for GDB to tell whether the inferior is sharing GDB's
terminal. Works best on Linux and Solaris; the fallback works just
as well as currently.
- With that, we can remove the inf->attach_flag tests from
child_terminal_inferior/child_terminal_ours.
- Currently target_ops.to_ours is responsible for both saving the
current inferior's terminal state, and restoring gdb's state.
Because each inferior has its own terminal state (possibly handled
by different targets in a multi-target world, even), we need to
split the inferior-saving part from the gdb-restoring part. The
patch adds a new target_ops.to_save_inferior target method for
that.
- Adds a new target_terminal::save_inferior() function, so that
sequences like:
scoped_restore_terminal_state save_state;
target_terminal::ours_for_output ();
... restore back inferiors that were
target_terminal_state::is_inferior before back to is_inferior, and
leaves inferiors that were is_ours alone.
- Along the way, this adds a default implementation of
target_pass_ctrlc to inflow.c (for inf-child.c), that handles
passing the Ctrl-C to a process running on GDB's terminal or to
some other process otherwise.
- Similarly, adds a new target default implementation of
target_interrupt, for the "interrupt" command. The current
implementation of this hook in inf-ptrace.c kills the whole process
group, but that's incorrect/undesirable because we may not be
attached to all processes in the process group. And also, it's
incorrect because inferior_process_group() doesn't really return
the inferior's real process group id if the inferior is not a
process group leader... This is the cause of PR gdb/13211 [1],
which this patch fixes. While at it, that target method's "ptid"
parameter is eliminated, because it's not really used.
- A new test is included that exercises and fixes PR gdb/13211, and
also fixes a GDB issue reported on stackoverflow that I ran into
while working on this [2]. The problem is similar to PR gdb/13211,
except that it also triggers with Ctrl-C. When debugging a daemon
(i.e., a process that disconnects from the controlling terminal and
is not a process group leader, then Ctrl-C doesn't work, you just
can't interrupt the inferior at all, resulting in a hung debug
session. The problem is that since the inferior is no longer
associated with gdb's session / controlling terminal, then trying
to put the inferior in the foreground fails. And so Ctrl-C never
reaches the inferior directly. pass_signal is only used when the
inferior is attached, but that is not the case here. This is fixed
by the new child_pass_ctrlc. Without the fix, the new
interrupt-daemon.exp testcase fails with timeout waiting for a
SIGINT that never arrives.
[1] PR gdb/13211 - Async / Process group and interrupt not working
https://sourceware.org/bugzilla/show_bug.cgi?id=13211
[2] GDB not reacting Ctrl-C when after fork() and setsid()
https://stackoverflow.com/questions/46101292/gdb-not-reacting-ctrl-c-when-after-fork-and-setsid
Note this patch does _not_ fix:
- PR gdb/14559 - The 'interrupt' command does not work if sigwait is in use
https://sourceware.org/bugzilla/show_bug.cgi?id=14559
- PR gdb/9425 - When using "sigwait" GDB doesn't trap SIGINT. Ctrl+C terminates program when should break gdb.
https://sourceware.org/bugzilla/show_bug.cgi?id=9425
The only way to fix that that I know of (without changing the kernel)
is to make GDB put inferiors in a separate session (create a
pseudo-tty master/slave pair, make the inferior run with the slave as
its terminal, and have gdb pump output/input on the master end).
gdb/ChangeLog:
2018-01-30 Pedro Alves <palves@redhat.com>
PR gdb/13211
* config.in, configure: Regenerate.
* configure.ac: Check for getpgid.
* go32-nat.c (go32_pass_ctrlc): New.
(go32_target): Install it.
* inf-child.c (inf_child_target): Install
child_terminal_save_inferior, child_pass_ctrlc and
child_interrupt.
* inf-ptrace.c (inf_ptrace_interrupt): Delete.
(inf_ptrace_target): No longer install it.
* infcmd.c (interrupt_target_1): Adjust.
* inferior.h (child_terminal_save_inferior, child_pass_ctrlc)
(child_interrupt): Declare.
(inferior::terminal_state): New.
* inflow.c (struct terminal_info): Update comments.
(inferior_process_group): Delete.
(terminal_is_ours): Delete.
(gdb_tty_state): New.
(child_terminal_init): Adjust.
(is_gdb_terminal, sharing_input_terminal_1)
(sharing_input_terminal): New functions.
(child_terminal_inferior): Adjust. Use sharing_input_terminal.
Set the process's actual process group in the foreground if
possible. Handle is_ours_for_output/is_ours distinction. Don't
mark terminal as the inferior's if not sharing GDB's terminal.
Don't check attach_flag.
(child_terminal_ours_for_output, child_terminal_ours): Adjust to
pass down a target_terminal_state.
(child_terminal_save_inferior): New, factored out from ...
(child_terminal_ours_1): ... this. Handle
target_terminal_state::is_ours_for_output.
(child_interrupt, child_pass_ctrlc): New.
(inflow_inferior_exit): Clear the inferior's terminal_state.
(copy_terminal_info): Copy the inferior's terminal state.
(_initialize_inflow): Remove reference to terminal_is_ours.
* inflow.h (inferior_process_group): Delete.
* nto-procfs.c (nto_handle_sigint, procfs_interrupt): Adjust.
* procfs.c (procfs_target): Don't install procfs_interrupt.
(procfs_interrupt): Delete.
* remote.c (remote_serial_quit_handler): Adjust.
(remote_interrupt): Remove ptid parameter. Adjust.
* target-delegates.c: Regenerate.
* target.c: Include "terminal.h".
(target_terminal::terminal_state): Rename to ...
(target_terminal::m_terminal_state): ... this.
(target_terminal::init): Adjust.
(target_terminal::inferior): Adjust to per-inferior
terminal_state.
(target_terminal::restore_inferior, target_terminal_is_ours_kind): New.
(target_terminal::ours, target_terminal::ours_for_output): Use
target_terminal_is_ours_kind.
(target_interrupt): Remove ptid parameter. Adjust.
(default_target_pass_ctrlc): Adjust.
* target.h (target_ops::to_terminal_save_inferior): New field.
(target_ops::to_interrupt): Remove ptid_t parameter.
(target_interrupt): Remove ptid_t parameter. Update comment.
(target_pass_ctrlc): Update comment.
* target/target.h (target_terminal_state): New scoped enum,
factored out of ...
(target_terminal::terminal_state): ... here.
(target_terminal::inferior): Update comments.
(target_terminal::restore_inferior): New.
(target_terminal::is_inferior, target_terminal::is_ours)
(target_terminal::is_ours_for_output): Adjust.
(target_terminal::scoped_restore_terminal_state): Adjust to
rename, and call restore_inferior() instead of inferior().
(target_terminal::scoped_restore_terminal_state::m_state): Change
type.
(target_terminal::terminal_state): Rename to ...
(target_terminal::m_terminal_state): ... this and change type.
gdb/gdbserver/ChangeLog:
2018-01-30 Pedro Alves <palves@redhat.com>
PR gdb/13211
* target.c (target_terminal::terminal_state): Rename to ...
(target_terminal::m_terminal_state): ... this.
gdb/testsuite/ChangeLog:
2018-01-30 Pedro Alves <palves@redhat.com>
PR gdb/13211
* gdb.base/interrupt-daemon.c: New.
* gdb.base/interrupt-daemon.exp: New.
* gdb.multi/multi-term-settings.c: New.
* gdb.multi/multi-term-settings.exp: New.
|
|
gdb/ChangeLog:
Update copyright year range in all GDB files
|
|
Replace it with for_each_thread. While at it, we can inline the
callback code. One little change is that I am using the
prev_general_thread variable instead of current_gen_ptid, since they
should have the same value.
gdb/gdbserver/ChangeLog:
* target.c (struct thread_search): Remove.
(thread_search_callback): Remove.
(prepare_to_access_memory): Use for_each_thread instead of
find_inferior. Inline code from thread_search_callback.
|
|
Remove the usage of inferior_list for the all_threads list in
gdbserver. The entry field in thread_info is removed, and replaced by a
simple ptid field.
I added some functions to iterate (for_each_thread) and find threads
(find_thread). However, changing all the users of find_inferior & co to
use these new functions would have made the patch way too big. So I
opted instead to make find_inferior & co some shims, so that the
existing code only needs to be updated minimally. We can then update
the existing code to use the new functions incrementally (I've started
to do the work, but I'll post it afterwards, see [1] if you want a peek).
This patch has been built-tested on all relevant platforms, except
lynx. I also regtested using the native-gdbserver and
native-extended-gdbserver boards on x86.
[1] https://github.com/simark/binutils-gdb/commits/kill-inferior-list-entry
gdb/gdbserver/ChangeLog:
* inferiors.h: (struct inferior_list): Remove.
(struct inferior_list_entry); Remove.
(add_inferior_to_list, clear_inferior_list, one_inferior_p,
A_I_NEXT, ALL_INFERIORS_TYPE, ALL_INFERIORS, remove_inferior,
get_first_inferior): Remove.
(for_each_inferior, for_each_inferior_with_data, find_inferior,
find_inferior_id, find_inferior_in_random): Change signature.
* inferiors.c (all_threads): Change type to
std::list<thread_info *>.
(get_thread): Remove macro.
(find_inferior, find_inferior_id): Change signature, implement
using find_thread.
(find_inferior_in_random): Change signature, implement using
find_thread_in_random.
(for_each_inferior, for_each_inferior_with_data): Change
signature, implement using for_each_thread.
(add_inferior_to_list, remove_inferior): Remove.
(add_thread, get_first_thread, thread_of_pid,
find_any_thread_of_pid, free_one_thread, remove_thread): Update.
(get_first_inferior, one_inferior_p, clear_inferior_list):
Remove.
(clear_inferiors, get_thread_process): Update.
* gdbthread.h: Include <list>.
(struct thread_info) <entry>: Remove field.
<id>: New field.
(all_threads): Change type to std::list<thread_info *>.
(get_first_inferior): Add doc.
(find_thread, for_each_thread, find_thread_in_random): New
functions.
(current_ptid, pid_of, ptid_of, lwpid_of): Update.
* linux-arm-low.c (update_registers_callback): Update.
* linux-low.c (second_thread_of_pid_p): Update.
(kill_one_lwp_callback, linux_detach_lwp_callback,
delete_lwp_callback, status_pending_p_callback, same_lwp,
find_lwp_pid, num_lwps, iterate_over_lwps_filter,
iterate_over_lwps, not_stopped_callback,
resume_stopped_resumed_lwps, count_events_callback,
select_singlestep_lwp_callback, select_event_lwp_callback,
unsuspend_one_lwp, linux_wait_1, send_sigstop_callback,
suspend_and_send_sigstop_callback, wait_for_sigstop,
stuck_in_jump_pad_callback, move_out_of_jump_pad_callback,
lwp_running, linux_set_resume_request, resume_status_pending_p,
need_step_over_p, start_step_over, linux_resume_one_thread,
proceed_one_lwp, unsuspend_and_proceed_one_lwp,
reset_lwp_ptrace_options_callback): Update.
* linux-mips-low.c (update_watch_registers_callback): Update.
* regcache.c (regcache_invalidate_one, regcache_invalidate):
Update.
(free_register_cache_thread_one): Remove.
(regcache_release): Update.
* server.c (handle_btrace_enable_bts, handle_btrace_enable_pt,
handle_qxfer_threads_worker): Update.
(handle_query): Update, use list iterator.
(visit_actioned_threads, handle_pending_status,
queue_stop_reply_callback, gdb_wants_all_threads_stopped,
clear_pending_status_callback, set_pending_status_callback,
find_status_pending_thread_callback, handle_status,
process_serial_event): Update.
* target.c (thread_search_callback): Update.
* thread-db.c (thread_db_get_tls_address): Update.
* tracepoint.c (tracepoint_finished_step, tracepoint_was_hit):
Update.
* win32-i386-low.c (update_debug_registers_callback): Update.
* win32-low.c (delete_thread_info, child_delete_thread,
continue_one_thread, suspend_one_thread,
get_child_debug_event): Adjust.
|
|
This is a technical debt that I left when I ported "switch_to_thread"
to gdbserver. It's a simple patch that converts occurences of:
current_thread = find_thread_ptid (ptid);
to:
switch_to_thread (ptid);
This patch also converts a simple "if" to a "gdb_assert" on
gdbserver's version of "switch_to_thread":
gdb_assert (ptid != minus_one_ptid);
This change makes the code more similar to what GDB already does.
Regtested on BuildBot.
gdb/gdbserver/ChangeLog:
2017-09-26 Sergio Durigan Junior <sergiodj@redhat.com>
* gdbthread.h: Include "common-gdbthread.h".
* inferiors.c (switch_to_thread): Use "gdb_assert" instead of
"if" when validating the ptid.
* remote-utils.c: Include "gdbthread.h".
(prepare_resume_reply): Use "switch_to_thread".
* target.c (done_accessing_memory): Likewise.
|
|
Back in commit f0db101d9897 ("gdbserver: don't pick a random thread if
the current thread dies"), a couple years ago, the last references to
set_desired_thread(0) [select the Hc thread] were removed, and all the
remaining calls to set_desired_thread pass '1', meaning general
thread. This means we can simplify set_desired_thread.
gdb/gdbserver/ChangeLog:
2017-09-21 Pedro Alves <palves@redhat.com>
* server.c (gdb_read_memory, handle_status, process_serial_event)
(handle_serial_event, handle_target_event): Adjust to
set_desired_thread prototype change.
* target.c (set_desired_thread): Remove 'use_general' parameter
and adjust.
* target.h (set_desired_thread): Remove 'use_general' parameter.
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|
This removes make_cleanup_restore_target_terminal and generally
C++-ifies target terminal handling. It changes all target_terminal_*
functions to be static members of a new target_terminal class and
changes the cleanup to be a scoped_* class.
make_cleanup_override_quit_handler is also removed in favor of simply
using scoped_restore.
Note that there are some files in this patch that I could not compile.
Considering that some of the rewrites were automated, and that none of
these files involed cleanups, I feel that this is relatively safe.
Regression tested by the buildbot.
gdb/ChangeLog
2017-09-20 Tom Tromey <tom@tromey.com>
* windows-nat.c (get_windows_debug_event, windows_wait)
(do_initial_windows_stuff, windows_attach): Update.
* utils.c (vwarning, internal_vproblem): Update.
(ui_unregister_input_event_handler_cleanup)
(prepare_to_handle_input): Remove.
(class scoped_input_handler): New.
(defaulted_query, prompt_for_continue): Update.
* tui/tui-hooks.c (tui_refresh_frame_and_register_information):
Update.
* top.c (undo_terminal_modifications_before_exit): Update.
* target/target.h (target_terminal_init, target_terminal_inferior)
(target_terminal_ours): Don't declare.
(class target_terminal): New.
* target.h (target_terminal_is_inferior, target_terminal_is_ours)
(target_terminal_ours_for_output)
(make_cleanup_restore_target_terminal): Don't declare.
(target_terminal_info): Remove.
* target.c (enum terminal_state, terminal_state): Remove.
(target_terminal::terminal_state): Define.
(target_terminal::init): Rename from target_terminal_init.
(target_terminal::inferior): Rename from
target_terminal_inferior.
(target_terminal::ours): Rename from target_terminal_ours.
(target_terminal::ours_for_output): Rename from
target_terminal_ours_for_output.
(target_terminal::info): New method.
(cleanup_restore_target_terminal)
(make_cleanup_restore_target_terminal): Remove.
* solib.c (handle_solib_event): Update.
* remote.c (remote_serial_quit_handler): Update.
(remote_terminal_inferior, remote_wait_as): Update.
* record-full.c (record_full_wait_1): Update.
* nto-procfs.c (procfs_create_inferior): Update.
* nat/fork-inferior.c (startup_inferior): Update.
* mi/mi-interp.c (mi_new_thread, mi_thread_exit)
(mi_record_changed, mi_inferior_added, mi_inferior_appeared)
(mi_inferior_exit, mi_inferior_removed, mi_traceframe_changed)
(mi_tsv_created, mi_tsv_deleted, mi_tsv_modified)
(mi_breakpoint_created, mi_breakpoint_deleted)
(mi_breakpoint_modified, mi_on_resume, mi_solib_loaded)
(mi_solib_unloaded, mi_command_param_changed, mi_memory_changed)
(mi_user_selected_context_changed, report_initial_inferior):
Update.
* linux-nat.c (linux_nat_attach, linux_nat_terminal_ours)
(linux_nat_terminal_inferior): Update.
* infrun.c (follow_fork_inferior)
(handle_vfork_child_exec_or_exit, do_target_resume)
(check_curr_ui_sync_execution_done, handle_inferior_event_1)
(handle_signal_stop, maybe_remove_breakpoints, normal_stop):
Update.
* inflow.c (child_terminal_init, info_terminal_command): Update.
* infcmd.c (post_create_inferior, continue_1, prepare_one_step)
(attach_command): Update.
* infcall.c (call_thread_fsm_should_stop): Update.
* gnu-nat.c (gnu_attach): Update.
* extension.c (struct active_ext_lang_state)
(restore_active_ext_lang): Update.
* exceptions.c (print_flush): Update.
* event-top.c (async_enable_stdin, default_quit_handler): Update.
(struct quit_handler_cleanup_data, restore_quit_handler)
(restore_quit_handler_dtor, make_cleanup_override_quit_handler):
Remove.
* cp-support.c (gdb_demangle): Update.
* breakpoint.c (update_inserted_breakpoint_locations)
(insert_breakpoint_locations, handle_jit_event)
(disable_breakpoints_in_unloaded_shlib): Update.
* annotate.c (annotate_breakpoints_invalid)
(annotate_frames_invalid): Update.
gdb/gdbserver/ChangeLog
2017-09-20 Tom Tromey <tom@tromey.com>
* target.c (target_terminal::terminal_state): Define.
(target_terminal::init): Rename from target_terminal_init.
(target_terminal::inferior): Rename from
target_terminal_inferior.
(target_terminal::ours): Rename from target_terminal_ours.
(target_terminal::ours_for_output, target_terminal::info): New.
|
|
This is the most important (and the biggest, sorry) patch of the
series. It moves fork_inferior from gdb/fork-child.c to
nat/fork-inferior.c and makes all the necessary adjustments to both
GDB and gdbserver to make sure everything works OK.
There is no "most important change" with this patch; all changes are
made in a progressive way, making sure that gdbserver had the
necessary features while not breaking GDB at the same time.
I decided to go ahead and implement a partial support for starting the
inferior with a shell on gdbserver, although the full feature comes in
the next patch. The user won't have the option to disable the
startup-with-shell, and also won't be able to change which shell
gdbserver will use (other than setting the $SHELL environment
variable, that is).
Everything is working as expected, and no regressions were present
during the tests.
gdb/ChangeLog:
2017-06-07 Sergio Durigan Junior <sergiodj@redhat.com>
Pedro Alves <palves@redhat.com>
* Makefile.in (HFILES_NO_SRCDIR): Add "common/common-inferior.h"
and "nat/fork-inferior.h".
* common/common-inferior.h: New file, with contents from
"gdb/inferior.h".
* commom/common-utils.c: Include "common-utils.h".
(stringify_argv): New function.
* common/common-utils.h (stringify_argv): New prototype.
* configure.nat: Add "fork-inferior.o" as a dependency for
"*linux*", "fbsd*" and "nbsd*" hosts.
* corefile.c (get_exec_file): Update comment.
* darwin-nat.c (darwin_ptrace_him): Call "gdb_startup_inferior"
instead of "startup_inferior".
(darwin_create_inferior): Call "add_thread_silent" after
"fork_inferior".
* fork-child.c: Cleanup unnecessary includes.
(SHELL_FILE): Move to "common/common-fork-child.c".
(environ): Likewise.
(exec_wrapper): Initialize.
(get_exec_wrapper): New function.
(breakup_args): Move to "common/common-fork-child.c"; rename to
"breakup_args_for_exec".
(escape_bang_in_quoted_argument): Move to
"common/common-fork-child.c".
(saved_ui): New variable.
(prefork_hook): New function.
(postfork_hook): Likewise.
(postfork_child_hook): Likewise.
(gdb_startup_inferior): Likewise.
(fork_inferior): Move to "common/common-fork-child.c". Update
function to support gdbserver.
(startup_inferior): Likewise.
* gdbcore.h (get_exec_file): Remove declaration.
* gnu-nat.c (gnu_create_inferior): Call "gdb_startup_inferior"
instead of "startup_inferior". Call "add_thread_silent" after
"fork_inferior".
* inf-ptrace.c: Include "nat/fork-inferior.h" and "utils.h".
(inf_ptrace_create_inferior): Call "gdb_startup_inferior"
instead of "startup_inferior". Call "add_thread_silent" after
"fork_inferior".
* inferior.h: Include "common-inferior.h".
(trace_start_error): Move to "common/common-utils.h".
(trace_start_error_with_name): Likewise.
(fork_inferior): Move prototype to "nat/fork-inferior.h".
(startup_inferior): Likewise.
(gdb_startup_inferior): New prototype.
* nat/fork-inferior.c: New file, with contents from "fork-child.c".
* nat/fork-inferior.h: New file.
* procfs.c (procfs_init_inferior): Call "gdb_startup_inferior"
instead of "startup_inferior". Call "add_thread_silent" after
"fork_inferior".
* target.h (target_terminal_init): Move prototype to
"target/target.h".
(target_terminal_inferior): Likewise.
(target_terminal_ours): Likewise.
* target/target.h (target_terminal_init): New prototype, moved
from "target.h".
(target_terminal_inferior): Likewise.
(target_terminal_ours): Likewise.
* utils.c (gdb_flush_out_err): New function.
gdb/gdbserver/ChangeLog:
2017-06-07 Sergio Durigan Junior <sergiodj@redhat.com>
Pedro Alves <palves@redhat.com>
* Makefile.in (SFILES): Add "nat/fork-inferior.o".
* configure: Regenerate.
* configure.srv (srv_linux_obj): Add "fork-child.o" and
"fork-inferior.o".
(i[34567]86-*-lynxos*): Likewise.
(spu*-*-*): Likewise.
* fork-child.c: New file.
* linux-low.c: Include "common-inferior.h", "nat/fork-inferior.h"
and "environ.h".
(linux_ptrace_fun): New function.
(linux_create_inferior): Adjust function prototype to reflect
change on "target.h". Adjust function code to use
"fork_inferior".
(linux_request_interrupt): Delete "signal_pid".
* lynx-low.c: Include "common-inferior.h" and "nat/fork-inferior.h".
(lynx_ptrace_fun): New function.
(lynx_create_inferior): Adjust function prototype to reflect
change on "target.h". Adjust function code to use
"fork_inferior".
* nto-low.c (nto_create_inferior): Adjust function prototype and
code to reflect change on "target.h". Update comments.
* server.c: Include "common-inferior.h", "nat/fork-inferior.h",
"common-terminal.h" and "environ.h".
(terminal_fd): Moved to fork-child.c.
(old_foreground_pgrp): Likewise.
(restore_old_foreground_pgrp): Likewise.
(last_status): Make it global.
(last_ptid): Likewise.
(our_environ): New variable.
(startup_with_shell): Likewise.
(program_name): Likewise.
(program_argv): Rename to...
(program_args): ...this.
(wrapper_argv): New variable.
(start_inferior): Delete function.
(get_exec_wrapper): New function.
(get_exec_file): Likewise.
(get_environ): Likewise.
(prefork_hook): Likewise.
(post_fork_inferior): Likewise.
(postfork_hook): Likewise.
(postfork_child_hook): Likewise.
(handle_v_run): Update code to deal with arguments coming from the
remote host. Update calls from "start_inferior" to
"create_inferior".
(captured_main): Likewise. Initialize environment variable. Call
"have_job_control".
* server.h (post_fork_inferior): New prototype.
(get_environ): Likewise.
(last_status): Declare.
(last_ptid): Likewise.
(signal_pid): Likewise.
* spu-low.c: Include "common-inferior.h" and "nat/fork-inferior.h".
(spu_ptrace_fun): New function.
(spu_create_inferior): Adjust function prototype to reflect change
on "target.h". Adjust function code to use "fork_inferior".
* target.c (target_terminal_init): New function.
(target_terminal_inferior): Likewise.
(target_terminal_ours): Likewise.
* target.h: Include <vector>.
(struct target_ops) <create_inferior>: Update prototype.
(create_inferior): Update macro.
* utils.c (gdb_flush_out_err): New function.
* win32-low.c (win32_create_inferior): Adjust function prototype
and code to reflect change on "target.h".
gdb/testsuite/ChangeLog:
2017-06-07 Sergio Durigan Junior <sergiodj@redhat.com>
* gdb.server/non-existing-program.exp: Update regex in order to
reflect the fact that gdbserver is now using fork_inferior (with a
shell) to startup the inferior.
|
|
This applies the second part of GDB's End of Year Procedure, which
updates the copyright year range in all of GDB's files.
gdb/ChangeLog:
Update copyright year range in all GDB files.
|
|
This simple commit consolidates the API of
target_supports_multi_process. Since both GDB and gdbserver use the
same function prototype, all that was needed was to move create this
prototype on gdb/target/target.h and turn the macros declared on
gdb/{,gdbserver/}target.h into actual functions.
Regtested (clean pass) on the BuildBot.
gdb/ChangeLog:
2016-10-06 Sergio Durigan Junior <sergiodj@redhat.com>
* target.c (target_supports_multi_process): New function, moved
from...
* target.h (target_supports_multi_process): ... here. Remove
macro.
* target/target.h (target_supports_multi_process): New prototype.
gdb/gdbserver/ChangeLog:
2016-10-06 Sergio Durigan Junior <sergiodj@redhat.com>
* target.c (target_supports_multi_process): New function, moved
from...
* target.h (target_supports_multi_process): ... here. Remove
macro.
|
|
Commit 049a8570 (Use target_continue{,_no_signal} instead of target_resume)
replaces the code stopping lwp with target_continue_no_signal in
target_stop_and_wait, like this,
- resume_info.thread = ptid;
- resume_info.kind = resume_stop;
- resume_info.sig = GDB_SIGNAL_0;
- (*the_target->resume) (&resume_info, 1);
+ target_continue_no_signal (ptid);
the replacement is not equivalent, and it causes PR 20627. This patch
is just to revert that change.
Regression testing it on x86_64-linux.
gdb/gdbserver:
2016-09-30 Yao Qi <yao.qi@linaro.org>
PR gdbserver/20627
* target.c (target_stop_and_wait): Don't call
target_continue_no_signal, use resume_stop instead.
|
|
This patch consolidates the API of target_mourn_inferior between GDB
and gdbserver, in my continuing efforts to make sharing the
fork_inferior function possible between both.
GDB's version of the function did not care about the inferior's ptid
being mourned, but gdbserver's needed to know this information. Since
it actually makes sense to pass the ptid as an argument, instead of
depending on a global value directly (which GDB's version did), I
decided to make the generic API to accept it. I then went on and
extended all calls being made on GDB to include a ptid argument (which
ended up being inferior_ptid most of the times, anyway), and now we
have a more sane interface.
On GDB's side, after talking to Pedro a bit about it, we decided that
just an assertion to make sure that the ptid being passed is equal to
inferior_ptid would be enough for now, on the GDB side. We can remove
the assertion and perform more operations later if we ever pass
anything different than inferior_ptid.
Regression tested on our BuildBot, everything OK.
I'd appreciate a special look at gdb/windows-nat.c's modification
because I wasn't really sure what to do there. It seemed to me that
maybe I should build a ptid out of the process information there, but
then I am almost sure the assertion on GDB's side would trigger.
gdb/ChangeLog:
2016-09-19 Sergio Durigan Junior <sergiodj@redhat.com>
* darwin-nat.c (darwin_kill_inferior): Adjusting call to
target_mourn_inferior to include ptid_t argument.
* fork-child.c (startup_inferior): Likewise.
* gnu-nat.c (gnu_kill_inferior): Likewise.
* inf-ptrace.c (inf_ptrace_kill): Likewise.
* infrun.c (handle_inferior_event_1): Likewise.
* linux-nat.c (linux_nat_attach): Likewise.
(linux_nat_kill): Likewise.
* nto-procfs.c (interrupt_query): Likewise.
(procfs_interrupt): Likewise.
(procfs_kill_inferior): Likewise.
* procfs.c (procfs_kill_inferior): Likewise.
* record.c (record_mourn_inferior): Likewise.
* remote-sim.c (gdbsim_kill): Likewise.
* remote.c (remote_detach_1): Likewise.
(remote_kill): Likewise.
* target.c (target_mourn_inferior): Change declaration to accept
new ptid_t argument; use gdb_assert on it.
* target.h (target_mourn_inferior): Move function prototype from
here...
* target/target.h (target_mourn_inferior): ... to here. Adjust it
to accept new ptid_t argument.
* windows-nat.c (get_windows_debug_event): Adjusting call to
target_mourn_inferior to include ptid_t argument.
gdb/gdbserver/ChangeLog:
2016-09-19 Sergio Durigan Junior <sergiodj@redhat.com>
* server.c (start_inferior): Call target_mourn_inferior instead of
mourn_inferior; pass ptid_t argument to it.
(resume): Likewise.
(handle_target_event): Likewise.
* target.c (target_mourn_inferior): New function.
* target.h (mourn_inferior): Delete macro.
|
|
This commit moves the target_wait prototype from the GDB-specific
target.h header to the common target/target.h header. Then, it
creates a compatible implementation of target_wait on gdbserver using
the_target->wait, and adjusts the (only) caller (mywait function).
Pretty straightforward, no regressions introduced.
gdb/gdbserver/ChangeLog:
2016-09-01 Sergio Durigan Junior <sergiodj@redhat.com>
* target.c (mywait): Call target_wait instead of
the_target->wait.
(target_wait): New function.
gdb/ChangeLog:
2016-09-01 Sergio Durigan Junior <sergiodj@redhat.com>
* target.c (target_wait): Mention that the function's prototype
can be found at target/target.h.
* target.h (target_wait): Move prototype from here...
* target/target.h (target_wait): ... to here.
|
|
This commit implements a new function, target_continue, on top of the
target_resume function. Then, it replaces all calls to target_resume
by calls to target_continue or to the already existing
target_continue_no_signal.
This is one of the (many) necessary steps needed to consolidate the
target interface between GDB and gdbserver. In particular, I am
interested in the impact this change will have on the unification of
the fork_inferior function (which I have been working on).
Tested on the BuildBot, no regressions introduced.
gdb/gdbserver/ChangeLog:
2016-09-31 Sergio Durigan Junior <sergiodj@redhat.com>
* server.c (start_inferior): New variable 'ptid'. Replace calls
to the_target->resume by target_continue{,_no_signal}, depending
on the case.
* target.c (target_stop_and_wait): Call target_continue_no_signal
instead of the_target->resume.
(target_continue): New function.
gdb/ChangeLog:
2016-09-31 Sergio Durigan Junior <sergiodj@redhat.com>
* fork-child.c (startup_inferior): Replace calls to target_resume
by target_continue{,_no_signal}, depending on the case.
* linux-nat.c (cleanup_target_stop): Call
target_continue_no_signal instead of target_resume.
* procfs.c (procfs_wait): Likewise.
* target.c (target_continue): New function.
* target/target.h (target_continue): New prototype.
|
|
gdb/ChangeLog:
Update year range in copyright notice of all files.
|
|
Connecting GDB to a LynxOS-178 GDBserver causes GDBserver to crash:
% gdbserver :4444 simple_main
Process simple_main created; pid = 19
Listening on port 4444
Remote debugging from host 205.232.38.10
Segmentation fault (core dumped)
The crash happens in thread_search_callback where the function
calls the_target->thread_stopped (via the thread_stopped macro)
without verifying whether the callback is NULL or not.
For the record, the regression was introduced by:
commit a67a9faef0e32886c83611cc7a0ba61e91123063
Date: Mon Nov 30 16:05:26 2015 +0000
Subject: gdbserver:prepare_access_memory: pick another thread
This patch avoids the crash by checking the value of the callback
first, before calling it.
gdb/gdbserver/ChangeLog:
* target.c (thread_search_callback): Add check that
the thread_stopped target callback is not NULL before
calling it.
|
|
Say GDB wants to access the inferior process's memory. The current
remote general thread is 3, but GDB's switched to thread 2. Because
both threads are of the same process, GDB skips making the remote
thread be thread 2 as well (sending an Hg packet) before accessing
memory (remote.c:set_general_process). However, if thread 3 has
exited meanwhile, thread 3 no longer exists on the server and
gdbserver points current_thread to NULL. The result is the memory
access fails, even through the process still exists.
Fix this by making prepare_to_access memory select the thread to
access memory through.
gdb/gdbserver/ChangeLog:
2015-11-30 Pedro Alves <palves@redhat.com>
* mem-break.c (check_gdb_bp_preconditions): Remove current_thread
check.
(set_gdb_breakpoint): If prepare_to_access_memory fails, set *ERR
to -1.
* target.c (struct thread_search): New structure.
(thread_search_callback): New function.
(prev_general_thread): New global.
(prepare_to_access_memory, done_accessing_memory): New functions.
* target.h (prepare_to_access_memory, done_accessing_memory):
Replace macros with function declarations.
|
|
This patch moves default_breakpoint_kind_from_pc to target.c and creates a macro
so that all targets can easily use it.
This allows the breakpoint_kind_from_pc operation to be left unimplemented in
targets that do not need it.
This is preparation to fix the win32/nto/spu build that was broken by this
patch: https://sourceware.org/ml/gdb-patches/2015-10/msg00369.html
No regression on Ubuntu 14.04 x86-64 with gdbserver-{native-extended}
gdb/gdbserver/ChangeLog:
* linux-low.c (default_breakpoint_kind_from_pc): Move to target.c.
* mem-break.c (set_breakpoint_at): Use target_breakpoint_kind_from_pc.
* target.c (default_breakpoint_kind_from_pc): Moved from linux-low.c
* target.h (target_breakpoint_kind_from_pc): New macro.
|
|
Most allocation functions (if not all) return a void* pointing to the
allocated memory. In C++, we need to add an explicit cast when
assigning the result to a pointer to another type (which is the case
more often than not).
The content of this patch is taken from Pedro's branch, from commit
"(mostly) auto-generated patch to insert casts needed for C++". I
validated that the changes make sense and manually reflowed the code to
make it respect the coding style. I also found multiple places where I
could use XNEW/XNEWVEC/XRESIZEVEC/etc.
Thanks a lot to whoever did that automated script to insert casts, doing
it completely by hand would have taken a ridiculous amount of time.
Only files built on x86 with --enable-targets=all are modified. This
means that all other -nat.c files are untouched and will have to be
dealt with later by using appropiate compilers. Or maybe we can try to
build them with a regular g++ just to know where to add casts, I don't
know.
I built-tested this with --enable-targets=all and reg-tested.
Here's the changelog entry, which was not too bad to make despite the
size, thanks to David Malcom's script. I fixed some bits by hand, but
there might be some wrong parts left (hopefully not).
gdb/ChangeLog:
* aarch64-linux-tdep.c (aarch64_stap_parse_special_token): Add cast
to allocation result assignment.
* ada-exp.y (write_object_renaming): Likewise.
(write_ambiguous_var): Likewise.
(ada_nget_field_index): Likewise.
(write_var_or_type): Likewise.
* ada-lang.c (ada_decode_symbol): Likewise.
(ada_value_assign): Likewise.
(value_pointer): Likewise.
(cache_symbol): Likewise.
(add_nonlocal_symbols): Likewise.
(ada_name_for_lookup): Likewise.
(symbol_completion_add): Likewise.
(ada_to_fixed_type_1): Likewise.
(ada_get_next_arg): Likewise.
(defns_collected): Likewise.
* ada-lex.l (processId): Likewise.
(processString): Likewise.
* ada-tasks.c (read_known_tasks_array): Likewise.
(read_known_tasks_list): Likewise.
* ada-typeprint.c (decoded_type_name): Likewise.
* addrmap.c (addrmap_mutable_create_fixed): Likewise.
* amd64-tdep.c (amd64_push_arguments): Likewise.
(amd64_displaced_step_copy_insn): Likewise.
(amd64_classify_insn_at): Likewise.
(amd64_relocate_instruction): Likewise.
* amd64obsd-tdep.c (amd64obsd_sigtramp_p): Likewise.
* arch-utils.c (simple_displaced_step_copy_insn): Likewise.
(initialize_current_architecture): Likewise.
* arm-linux-tdep.c (arm_stap_parse_special_token): Likewise.
* arm-symbian-tdep.c (arm_symbian_osabi_sniffer): Likewise.
* arm-tdep.c (arm_exidx_new_objfile): Likewise.
(arm_push_dummy_call): Likewise.
(extend_buffer_earlier): Likewise.
(arm_adjust_breakpoint_address): Likewise.
(arm_skip_stub): Likewise.
* auto-load.c (filename_is_in_pattern): Likewise.
(maybe_add_script_file): Likewise.
(maybe_add_script_text): Likewise.
(auto_load_objfile_script_1): Likewise.
* auxv.c (ld_so_xfer_auxv): Likewise.
* ax-general.c (new_agent_expr): Likewise.
(grow_expr): Likewise.
(ax_reg_mask): Likewise.
* bcache.c (bcache_full): Likewise.
* breakpoint.c (program_breakpoint_here_p): Likewise.
* btrace.c (parse_xml_raw): Likewise.
* build-id.c (build_id_to_debug_bfd): Likewise.
* buildsym.c (end_symtab_with_blockvector): Likewise.
* c-exp.y (string_exp): Likewise.
(qualified_name): Likewise.
(write_destructor_name): Likewise.
(operator_stoken): Likewise.
(parse_number): Likewise.
(scan_macro_expansion): Likewise.
(yylex): Likewise.
(c_print_token): Likewise.
* c-lang.c (c_get_string): Likewise.
(emit_numeric_character): Likewise.
* charset.c (wchar_iterate): Likewise.
* cli/cli-cmds.c (complete_command): Likewise.
(make_command): Likewise.
* cli/cli-dump.c (restore_section_callback): Likewise.
(restore_binary_file): Likewise.
* cli/cli-interp.c (cli_interpreter_exec): Likewise.
* cli/cli-script.c (execute_control_command): Likewise.
* cli/cli-setshow.c (do_set_command): Likewise.
* coff-pe-read.c (add_pe_forwarded_sym): Likewise.
(read_pe_exported_syms): Likewise.
* coffread.c (coff_read_struct_type): Likewise.
(coff_read_enum_type): Likewise.
* common/btrace-common.c (btrace_data_append): Likewise.
* common/buffer.c (buffer_grow): Likewise.
* common/filestuff.c (gdb_fopen_cloexec): Likewise.
* common/format.c (parse_format_string): Likewise.
* common/gdb_vecs.c (delim_string_to_char_ptr_vec_append): Likewise.
* common/xml-utils.c (xml_escape_text): Likewise.
* compile/compile-object-load.c (copy_sections): Likewise.
(compile_object_load): Likewise.
* compile/compile-object-run.c (compile_object_run): Likewise.
* completer.c (filename_completer): Likewise.
* corefile.c (read_memory_typed_address): Likewise.
(write_memory_unsigned_integer): Likewise.
(write_memory_signed_integer): Likewise.
(complete_set_gnutarget): Likewise.
* corelow.c (get_core_register_section): Likewise.
* cp-name-parser.y (d_grab): Likewise.
(allocate_info): Likewise.
(cp_new_demangle_parse_info): Likewise.
* cp-namespace.c (cp_scan_for_anonymous_namespaces): Likewise.
(cp_lookup_symbol_in_namespace): Likewise.
(lookup_namespace_scope): Likewise.
(find_symbol_in_baseclass): Likewise.
(cp_lookup_nested_symbol): Likewise.
(cp_lookup_transparent_type_loop): Likewise.
* cp-support.c (copy_string_to_obstack): Likewise.
(make_symbol_overload_list): Likewise.
(make_symbol_overload_list_namespace): Likewise.
(make_symbol_overload_list_adl_namespace): Likewise.
(first_component_command): Likewise.
* cp-valprint.c (cp_print_value): Likewise.
* ctf.c (ctf_xfer_partial): Likewise.
* d-exp.y (StringExp): Likewise.
* d-namespace.c (d_lookup_symbol_in_module): Likewise.
(lookup_module_scope): Likewise.
(find_symbol_in_baseclass): Likewise.
(d_lookup_nested_symbol): Likewise.
* dbxread.c (find_stab_function_addr): Likewise.
(read_dbx_symtab): Likewise.
(dbx_end_psymtab): Likewise.
(cp_set_block_scope): Likewise.
* dcache.c (dcache_alloc): Likewise.
* demangle.c (_initialize_demangler): Likewise.
* dicos-tdep.c (dicos_load_module_p): Likewise.
* dictionary.c (dict_create_hashed_expandable): Likewise.
(dict_create_linear_expandable): Likewise.
(expand_hashtable): Likewise.
(add_symbol_linear_expandable): Likewise.
* dwarf2-frame.c (add_cie): Likewise.
(add_fde): Likewise.
(dwarf2_build_frame_info): Likewise.
* dwarf2expr.c (dwarf_expr_grow_stack): Likewise.
(dwarf_expr_fetch_address): Likewise.
(add_piece): Likewise.
(execute_stack_op): Likewise.
* dwarf2loc.c (chain_candidate): Likewise.
(dwarf_entry_parameter_to_value): Likewise.
(read_pieced_value): Likewise.
(write_pieced_value): Likewise.
* dwarf2read.c (dwarf2_read_section): Likewise.
(add_type_unit): Likewise.
(read_comp_units_from_section): Likewise.
(fixup_go_packaging): Likewise.
(dwarf2_compute_name): Likewise.
(dwarf2_physname): Likewise.
(create_dwo_unit_in_dwp_v1): Likewise.
(create_dwo_unit_in_dwp_v2): Likewise.
(read_func_scope): Likewise.
(read_call_site_scope): Likewise.
(dwarf2_attach_fields_to_type): Likewise.
(process_structure_scope): Likewise.
(mark_common_block_symbol_computed): Likewise.
(read_common_block): Likewise.
(abbrev_table_read_table): Likewise.
(guess_partial_die_structure_name): Likewise.
(fixup_partial_die): Likewise.
(add_file_name): Likewise.
(dwarf2_const_value_data): Likewise.
(dwarf2_const_value_attr): Likewise.
(build_error_marker_type): Likewise.
(guess_full_die_structure_name): Likewise.
(anonymous_struct_prefix): Likewise.
(typename_concat): Likewise.
(dwarf2_canonicalize_name): Likewise.
(dwarf2_name): Likewise.
(write_constant_as_bytes): Likewise.
(dwarf2_fetch_constant_bytes): Likewise.
(copy_string): Likewise.
(parse_macro_definition): Likewise.
* elfread.c (elf_symfile_segments): Likewise.
(elf_rel_plt_read): Likewise.
(elf_gnu_ifunc_resolve_by_cache): Likewise.
(elf_gnu_ifunc_resolve_by_got): Likewise.
(elf_read_minimal_symbols): Likewise.
(elf_gnu_ifunc_record_cache): Likewise.
* event-top.c (top_level_prompt): Likewise.
(command_line_handler): Likewise.
* exec.c (resize_section_table): Likewise.
* expprint.c (print_subexp_standard): Likewise.
* fbsd-tdep.c (fbsd_collect_regset_section_cb): Likewise.
* findcmd.c (parse_find_args): Likewise.
* findvar.c (address_from_register): Likewise.
* frame.c (get_prev_frame_always): Likewise.
* gdb_bfd.c (gdb_bfd_ref): Likewise.
(get_section_descriptor): Likewise.
* gdb_obstack.c (obconcat): Likewise.
(obstack_strdup): Likewise.
* gdbtypes.c (lookup_function_type_with_arguments): Likewise.
(create_set_type): Likewise.
(lookup_unsigned_typename): Likewise.
(lookup_signed_typename): Likewise.
(resolve_dynamic_union): Likewise.
(resolve_dynamic_struct): Likewise.
(add_dyn_prop): Likewise.
(copy_dynamic_prop_list): Likewise.
(arch_flags_type): Likewise.
(append_composite_type_field_raw): Likewise.
* gdbtypes.h (INIT_FUNC_SPECIFIC): Likewise.
* gnu-v3-abi.c (gnuv3_rtti_type): Likewise.
* go-exp.y (string_exp): Likewise.
* go-lang.c (go_demangle): Likewise.
* guile/guile.c (compute_scheme_string): Likewise.
* guile/scm-cmd.c (gdbscm_parse_command_name): Likewise.
(gdbscm_canonicalize_command_name): Likewise.
* guile/scm-ports.c (ioscm_init_stdio_buffers): Likewise.
(ioscm_init_memory_port): Likewise.
(ioscm_reinit_memory_port): Likewise.
* guile/scm-utils.c (gdbscm_gc_xstrdup): Likewise.
(gdbscm_gc_dup_argv): Likewise.
* h8300-tdep.c (h8300_push_dummy_call): Likewise.
* hppa-tdep.c (internalize_unwinds): Likewise.
(read_unwind_info): Likewise.
* i386-cygwin-tdep.c (core_process_module_section): Likewise.
(windows_core_xfer_shared_libraries): Likewise.
* i386-tdep.c (i386_displaced_step_copy_insn): Likewise.
(i386_stap_parse_special_token_triplet): Likewise.
(i386_stap_parse_special_token_three_arg_disp): Likewise.
* i386obsd-tdep.c (i386obsd_sigtramp_p): Likewise.
* inf-child.c (inf_child_fileio_readlink): Likewise.
* inf-ptrace.c (inf_ptrace_fetch_register): Likewise.
(inf_ptrace_store_register): Likewise.
* infrun.c (follow_exec): Likewise.
(displaced_step_prepare_throw): Likewise.
(save_stop_context): Likewise.
(save_infcall_suspend_state): Likewise.
* jit.c (jit_read_descriptor): Likewise.
(jit_read_code_entry): Likewise.
(jit_symtab_line_mapping_add_impl): Likewise.
(finalize_symtab): Likewise.
(jit_unwind_reg_get_impl): Likewise.
* jv-exp.y (QualifiedName): Likewise.
* jv-lang.c (get_java_utf8_name): Likewise.
(type_from_class): Likewise.
(java_demangle_type_signature): Likewise.
(java_class_name_from_physname): Likewise.
* jv-typeprint.c (java_type_print_base): Likewise.
* jv-valprint.c (java_value_print): Likewise.
* language.c (add_language): Likewise.
* linespec.c (add_sal_to_sals_basic): Likewise.
(add_sal_to_sals): Likewise.
(decode_objc): Likewise.
(find_linespec_symbols): Likewise.
* linux-fork.c (fork_save_infrun_state): Likewise.
* linux-nat.c (linux_nat_detach): Likewise.
(linux_nat_fileio_readlink): Likewise.
* linux-record.c (record_linux_sockaddr): Likewise.
(record_linux_msghdr): Likewise.
(Do): Likewise.
* linux-tdep.c (linux_core_info_proc_mappings): Likewise.
(linux_collect_regset_section_cb): Likewise.
(linux_get_siginfo_data): Likewise.
* linux-thread-db.c (try_thread_db_load_from_pdir_1): Likewise.
(try_thread_db_load_from_dir): Likewise.
(thread_db_load_search): Likewise.
(info_auto_load_libthread_db): Likewise.
* m32c-tdep.c (m32c_m16c_address_to_pointer): Likewise.
(m32c_m16c_pointer_to_address): Likewise.
* m68hc11-tdep.c (m68hc11_pseudo_register_write): Likewise.
* m68k-tdep.c (m68k_get_longjmp_target): Likewise.
* machoread.c (macho_check_dsym): Likewise.
* macroexp.c (resize_buffer): Likewise.
(gather_arguments): Likewise.
(maybe_expand): Likewise.
* macrotab.c (new_macro_key): Likewise.
(new_source_file): Likewise.
(new_macro_definition): Likewise.
* mdebugread.c (parse_symbol): Likewise.
(parse_type): Likewise.
(parse_partial_symbols): Likewise.
(psymtab_to_symtab_1): Likewise.
* mem-break.c (default_memory_insert_breakpoint): Likewise.
* mi/mi-cmd-break.c (mi_argv_to_format): Likewise.
* mi/mi-main.c (mi_cmd_data_read_memory): Likewise.
(mi_cmd_data_read_memory_bytes): Likewise.
(mi_cmd_data_write_memory_bytes): Likewise.
(mi_cmd_trace_frame_collected): Likewise.
* mi/mi-parse.c (mi_parse_argv): Likewise.
(mi_parse): Likewise.
* minidebug.c (lzma_open): Likewise.
(lzma_pread): Likewise.
* mips-tdep.c (mips_read_fp_register_single): Likewise.
(mips_print_fp_register): Likewise.
* mipsnbsd-tdep.c (mipsnbsd_get_longjmp_target): Likewise.
* mipsread.c (read_alphacoff_dynamic_symtab): Likewise.
* mt-tdep.c (mt_register_name): Likewise.
(mt_registers_info): Likewise.
(mt_push_dummy_call): Likewise.
* namespace.c (add_using_directive): Likewise.
* nat/linux-btrace.c (perf_event_read): Likewise.
(linux_enable_bts): Likewise.
* nat/linux-osdata.c (linux_common_core_of_thread): Likewise.
* nat/linux-ptrace.c (linux_ptrace_test_ret_to_nx): Likewise.
* nto-tdep.c (nto_find_and_open_solib): Likewise.
(nto_parse_redirection): Likewise.
* objc-lang.c (objc_demangle): Likewise.
(find_methods): Likewise.
* objfiles.c (get_objfile_bfd_data): Likewise.
(set_objfile_main_name): Likewise.
(allocate_objfile): Likewise.
(objfile_relocate): Likewise.
(update_section_map): Likewise.
* osabi.c (generic_elf_osabi_sniff_abi_tag_sections): Likewise.
* p-exp.y (exp): Likewise.
(yylex): Likewise.
* p-valprint.c (pascal_object_print_value): Likewise.
* parse.c (initialize_expout): Likewise.
(mark_completion_tag): Likewise.
(copy_name): Likewise.
(parse_float): Likewise.
(type_stack_reserve): Likewise.
* ppc-linux-tdep.c (ppc_stap_parse_special_token): Likewise.
(ppu2spu_prev_register): Likewise.
* ppc-ravenscar-thread.c (supply_register_at_address): Likewise.
* printcmd.c (printf_wide_c_string): Likewise.
(printf_pointer): Likewise.
* probe.c (parse_probes): Likewise.
* python/py-cmd.c (gdbpy_parse_command_name): Likewise.
(cmdpy_init): Likewise.
* python/py-gdb-readline.c (gdbpy_readline_wrapper): Likewise.
* python/py-symtab.c (set_sal): Likewise.
* python/py-unwind.c (pyuw_sniffer): Likewise.
* python/python.c (python_interactive_command): Likewise.
(compute_python_string): Likewise.
* ravenscar-thread.c (get_running_thread_id): Likewise.
* record-full.c (record_full_exec_insn): Likewise.
(record_full_core_open_1): Likewise.
* regcache.c (regcache_raw_read_signed): Likewise.
(regcache_raw_read_unsigned): Likewise.
(regcache_cooked_read_signed): Likewise.
(regcache_cooked_read_unsigned): Likewise.
* remote-fileio.c (remote_fileio_func_open): Likewise.
(remote_fileio_func_rename): Likewise.
(remote_fileio_func_unlink): Likewise.
(remote_fileio_func_stat): Likewise.
(remote_fileio_func_system): Likewise.
* remote-mips.c (mips_xfer_memory): Likewise.
(mips_load_srec): Likewise.
(pmon_end_download): Likewise.
* remote.c (new_remote_state): Likewise.
(map_regcache_remote_table): Likewise.
(remote_register_number_and_offset): Likewise.
(init_remote_state): Likewise.
(get_memory_packet_size): Likewise.
(remote_pass_signals): Likewise.
(remote_program_signals): Likewise.
(remote_start_remote): Likewise.
(remote_check_symbols): Likewise.
(remote_query_supported): Likewise.
(extended_remote_attach): Likewise.
(process_g_packet): Likewise.
(store_registers_using_G): Likewise.
(putpkt_binary): Likewise.
(read_frame): Likewise.
(compare_sections_command): Likewise.
(remote_hostio_pread): Likewise.
(remote_hostio_readlink): Likewise.
(remote_file_put): Likewise.
(remote_file_get): Likewise.
(remote_pid_to_exec_file): Likewise.
(_initialize_remote): Likewise.
* rs6000-aix-tdep.c (rs6000_aix_ld_info_to_xml): Likewise.
(rs6000_aix_core_xfer_shared_libraries_aix): Likewise.
* rs6000-tdep.c (ppc_displaced_step_copy_insn): Likewise.
(bfd_uses_spe_extensions): Likewise.
* s390-linux-tdep.c (s390_displaced_step_copy_insn): Likewise.
* score-tdep.c (score7_malloc_and_get_memblock): Likewise.
* solib-dsbt.c (decode_loadmap): Likewise.
(fetch_loadmap): Likewise.
(scan_dyntag): Likewise.
(enable_break): Likewise.
(dsbt_relocate_main_executable): Likewise.
* solib-frv.c (fetch_loadmap): Likewise.
(enable_break2): Likewise.
(frv_relocate_main_executable): Likewise.
* solib-spu.c (spu_relocate_main_executable): Likewise.
(spu_bfd_open): Likewise.
* solib-svr4.c (lm_info_read): Likewise.
(read_program_header): Likewise.
(find_program_interpreter): Likewise.
(scan_dyntag): Likewise.
(elf_locate_base): Likewise.
(open_symbol_file_object): Likewise.
(read_program_headers_from_bfd): Likewise.
(svr4_relocate_main_executable): Likewise.
* solib-target.c (solib_target_relocate_section_addresses): Likewise.
* solib.c (solib_find_1): Likewise.
(exec_file_find): Likewise.
(solib_find): Likewise.
* source.c (openp): Likewise.
(print_source_lines_base): Likewise.
(forward_search_command): Likewise.
* sparc-ravenscar-thread.c (supply_register_at_address): Likewise.
* spu-tdep.c (spu2ppu_prev_register): Likewise.
(spu_get_overlay_table): Likewise.
* stabsread.c (patch_block_stabs): Likewise.
(define_symbol): Likewise.
(again:): Likewise.
(read_member_functions): Likewise.
(read_one_struct_field): Likewise.
(read_enum_type): Likewise.
(common_block_start): Likewise.
* stack.c (read_frame_arg): Likewise.
(backtrace_command): Likewise.
* stap-probe.c (stap_parse_register_operand): Likewise.
* symfile.c (syms_from_objfile_1): Likewise.
(find_separate_debug_file): Likewise.
(load_command): Likewise.
(load_progress): Likewise.
(load_section_callback): Likewise.
(reread_symbols): Likewise.
(add_filename_language): Likewise.
(allocate_compunit_symtab): Likewise.
(read_target_long_array): Likewise.
(simple_read_overlay_table): Likewise.
* symtab.c (symbol_set_names): Likewise.
(resize_symbol_cache): Likewise.
(rbreak_command): Likewise.
(completion_list_add_name): Likewise.
(completion_list_objc_symbol): Likewise.
(add_filename_to_list): Likewise.
* target-descriptions.c (maint_print_c_tdesc_cmd): Likewise.
* target-memory.c (target_write_memory_blocks): Likewise.
* target.c (target_read_string): Likewise.
(read_whatever_is_readable): Likewise.
(target_read_alloc_1): Likewise.
(simple_search_memory): Likewise.
(target_fileio_read_alloc_1): Likewise.
* tilegx-tdep.c (tilegx_push_dummy_call): Likewise.
* top.c (command_line_input): Likewise.
* tracefile-tfile.c (tfile_fetch_registers): Likewise.
* tracefile.c (tracefile_fetch_registers): Likewise.
* tracepoint.c (add_memrange): Likewise.
(init_collection_list): Likewise.
(add_aexpr): Likewise.
(trace_dump_actions): Likewise.
(parse_trace_status): Likewise.
(parse_tracepoint_definition): Likewise.
(parse_tsv_definition): Likewise.
(parse_static_tracepoint_marker_definition): Likewise.
* tui/tui-file.c (tui_sfileopen): Likewise.
(tui_file_adjust_strbuf): Likewise.
* tui/tui-io.c (tui_expand_tabs): Likewise.
* tui/tui-source.c (tui_set_source_content): Likewise.
* typeprint.c (find_global_typedef): Likewise.
* ui-file.c (do_ui_file_xstrdup): Likewise.
(ui_file_obsavestring): Likewise.
(mem_file_write): Likewise.
* utils.c (make_hex_string): Likewise.
(get_regcomp_error): Likewise.
(puts_filtered_tabular): Likewise.
(gdb_realpath_keepfile): Likewise.
(ldirname): Likewise.
(gdb_bfd_errmsg): Likewise.
(substitute_path_component): Likewise.
* valops.c (search_struct_method): Likewise.
(find_oload_champ_namespace_loop): Likewise.
* valprint.c (print_decimal_chars): Likewise.
(read_string): Likewise.
(generic_emit_char): Likewise.
* varobj.c (varobj_delete): Likewise.
(varobj_value_get_print_value): Likewise.
* vaxobsd-tdep.c (vaxobsd_sigtramp_sniffer): Likewise.
* windows-tdep.c (display_one_tib): Likewise.
* xcoffread.c (read_xcoff_symtab): Likewise.
(process_xcoff_symbol): Likewise.
(swap_sym): Likewise.
(scan_xcoff_symtab): Likewise.
(xcoff_initial_scan): Likewise.
* xml-support.c (gdb_xml_end_element): Likewise.
(xml_process_xincludes): Likewise.
(xml_fetch_content_from_file): Likewise.
* xml-syscall.c (xml_list_of_syscalls): Likewise.
* xstormy16-tdep.c (xstormy16_push_dummy_call): Likewise.
gdb/gdbserver/ChangeLog:
* ax.c (gdb_parse_agent_expr): Add cast to allocation result
assignment.
(gdb_unparse_agent_expr): Likewise.
* hostio.c (require_data): Likewise.
(handle_pread): Likewise.
* linux-low.c (disable_regset): Likewise.
(fetch_register): Likewise.
(store_register): Likewise.
(get_dynamic): Likewise.
(linux_qxfer_libraries_svr4): Likewise.
* mem-break.c (delete_fast_tracepoint_jump): Likewise.
(set_fast_tracepoint_jump): Likewise.
(uninsert_fast_tracepoint_jumps_at): Likewise.
(reinsert_fast_tracepoint_jumps_at): Likewise.
(validate_inserted_breakpoint): Likewise.
(clone_agent_expr): Likewise.
* regcache.c (init_register_cache): Likewise.
* remote-utils.c (putpkt_binary_1): Likewise.
(decode_M_packet): Likewise.
(decode_X_packet): Likewise.
(look_up_one_symbol): Likewise.
(relocate_instruction): Likewise.
(monitor_output): Likewise.
* server.c (handle_search_memory): Likewise.
(handle_qxfer_exec_file): Likewise.
(handle_qxfer_libraries): Likewise.
(handle_qxfer): Likewise.
(handle_query): Likewise.
(handle_v_cont): Likewise.
(handle_v_run): Likewise.
(captured_main): Likewise.
* target.c (write_inferior_memory): Likewise.
* thread-db.c (try_thread_db_load_from_dir): Likewise.
* tracepoint.c (init_trace_buffer): Likewise.
(add_tracepoint_action): Likewise.
(add_traceframe): Likewise.
(add_traceframe_block): Likewise.
(cmd_qtdpsrc): Likewise.
(cmd_qtdv): Likewise.
(cmd_qtstatus): Likewise.
(response_source): Likewise.
(response_tsv): Likewise.
(cmd_qtnotes): Likewise.
(gdb_collect): Likewise.
(initialize_tracepoint): Likewise.
|
|
supports_hardware_single_step
In my patch https://sourceware.org/ml/gdb-patches/2015-04/msg01110.html
a new target_ops hook supports_conditional_breakpoints was added to
disable conditional breakpoints if target doesn't have hardware single
step. This patch is to generalize this hook from
supports_conditional_breakpoints to supports_hardware_single_step,
so that the following patch can use it.
gdb/gdbserver:
2015-09-15 Yao Qi <yao.qi@linaro.org>
* linux-low.c (linux_supports_conditional_breakpoints): Rename
it to ...
(linux_supports_hardware_single_step): ... New function.
(linux_target_ops): Update.
* lynx-low.c (lynx_target_ops): Set field
supports_hardware_single_step to target_can_do_hardware_single_step.
* nto-low.c (nto_target_ops): Likewise.
* spu-low.c (spu_target_ops): Likewise.
* win32-low.c (win32_target_ops): Likewise.
* target.c (target_can_do_hardware_single_step): New function.
* target.h (struct target_ops) <supports_conditional_breakpoints>:
Remove. <supports_hardware_single_step>: New field.
(target_supports_conditional_breakpoints): Remove.
(target_supports_hardware_single_step): New macro.
(target_can_do_hardware_single_step): Declare.
* server.c (handle_query): Use target_supports_hardware_single_step
instead of target_supports_conditional_breakpoints.
|
|
This patch is part of the make-gdb-buildable-in-C++ effort. The idea is
to change some calls to the xmalloc family of functions to calls to the
equivalents in the XNEW family. This avoids adding an explicit cast, so
it keeps the code a bit more readable. Some of them also map relatively
well to a C++ equivalent (XNEW (struct foo) -> new foo), so it will be
possible to do scripted replacements if needed.
I only changed calls that were obviously allocating memory for one or
multiple "objects". Allocation of variable sizes (such as strings or
buffer handling) will be for later (and won't use XNEW).
- xmalloc (sizeof (struct foo)) -> XNEW (struct foo)
- xmalloc (num * sizeof (struct foo)) -> XNEWVEC (struct foo, num)
- xcalloc (1, sizeof (struct foo)) -> XCNEW (struct foo)
- xcalloc (num, sizeof (struct foo)) -> XCNEWVEC (struct foo, num)
- xrealloc (p, num * sizeof (struct foo) -> XRESIZEVEC (struct foo, p, num)
- obstack_alloc (ob, sizeof (struct foo)) -> XOBNEW (ob, struct foo)
- obstack_alloc (ob, num * sizeof (struct foo)) -> XOBNEWVEC (ob, struct foo, num)
- alloca (sizeof (struct foo)) -> XALLOCA (struct foo)
- alloca (num * sizeof (struct foo)) -> XALLOCAVEC (struct foo, num)
Some instances of xmalloc followed by memset to zero the buffer were
replaced by XCNEW or XCNEWVEC.
I regtested on x86-64, Ubuntu 14.04, but the patch touches many
architecture-specific files. For those I'll have to rely on the
buildbot or people complaining that I broke their gdb.
gdb/ChangeLog:
* aarch64-linux-nat.c (aarch64_add_process): Likewise.
* aarch64-tdep.c (aarch64_gdbarch_init): Likewise.
* ada-exp.y (write_ambiguous_var): Likewise.
* ada-lang.c (resolve_subexp): Likewise.
(user_select_syms): Likewise.
(assign_aggregate): Likewise.
(ada_evaluate_subexp): Likewise.
(cache_symbol): Likewise.
* addrmap.c (allocate_key): Likewise.
(addrmap_create_mutable): Likewise.
* aix-thread.c (sync_threadlists): Likewise.
* alpha-tdep.c (alpha_push_dummy_call): Likewise.
(alpha_gdbarch_init): Likewise.
* amd64-windows-tdep.c (amd64_windows_push_arguments): Likewise.
* arm-linux-nat.c (arm_linux_add_process): Likewise.
* arm-linux-tdep.c (arm_linux_displaced_step_copy_insn): Likewise.
* arm-tdep.c (push_stack_item): Likewise.
(arm_displaced_step_copy_insn): Likewise.
(arm_gdbarch_init): Likewise.
(_initialize_arm_tdep): Likewise.
* avr-tdep.c (push_stack_item): Likewise.
* ax-general.c (new_agent_expr): Likewise.
* block.c (block_initialize_namespace): Likewise.
* breakpoint.c (alloc_counted_command_line): Likewise.
(update_dprintf_command_list): Likewise.
(parse_breakpoint_sals): Likewise.
(decode_static_tracepoint_spec): Likewise.
(until_break_command): Likewise.
(clear_command): Likewise.
(update_global_location_list): Likewise.
(get_breakpoint_objfile_data) Likewise.
* btrace.c (ftrace_new_function): Likewise.
(btrace_set_insn_history): Likewise.
(btrace_set_call_history): Likewise.
* buildsym.c (add_symbol_to_list): Likewise.
(record_pending_block): Likewise.
(start_subfile): Likewise.
(start_buildsym_compunit): Likewise.
(push_subfile): Likewise.
(end_symtab_get_static_block): Likewise.
(buildsym_init): Likewise.
* cli/cli-cmds.c (source_command): Likewise.
* cli/cli-decode.c (add_cmd): Likewise.
* cli/cli-script.c (build_command_line): Likewise.
(setup_user_args): Likewise.
(realloc_body_list): Likewise.
(process_next_line): Likewise.
(copy_command_lines): Likewise.
* cli/cli-setshow.c (do_set_command): Likewise.
* coff-pe-read.c (read_pe_exported_syms): Likewise.
* coffread.c (coff_locate_sections): Likewise.
(coff_symtab_read): Likewise.
(coff_read_struct_type): Likewise.
* common/cleanups.c (make_my_cleanup2): Likewise.
* common/common-exceptions.c (throw_it): Likewise.
* common/filestuff.c (make_cleanup_close): Likewise.
* common/format.c (parse_format_string): Likewise.
* common/queue.h (DEFINE_QUEUE_P): Likewise.
* compile/compile-object-load.c (munmap_list_add): Likewise.
(compile_object_load): Likewise.
* compile/compile-object-run.c (compile_object_run): Likewise.
* compile/compile.c (append_args): Likewise.
* corefile.c (specify_exec_file_hook): Likewise.
* cp-support.c (make_symbol_overload_list): Likewise.
* cris-tdep.c (push_stack_item): Likewise.
(cris_gdbarch_init): Likewise.
* ctf.c (ctf_trace_file_writer_new): Likewise.
* dbxread.c (init_header_files): Likewise.
(add_new_header_file): Likewise.
(init_bincl_list): Likewise.
(dbx_end_psymtab): Likewise.
(start_psymtab): Likewise.
(dbx_end_psymtab): Likewise.
* dcache.c (dcache_init): Likewise.
* dictionary.c (dict_create_hashed): Likewise.
(dict_create_hashed_expandable): Likewise.
(dict_create_linear): Likewise.
(dict_create_linear_expandable): Likewise.
* dtrace-probe.c (dtrace_process_dof_probe): Likewise.
* dummy-frame.c (register_dummy_frame_dtor): Likewise.
* dwarf2-frame-tailcall.c (cache_new_ref1): Likewise.
* dwarf2-frame.c (dwarf2_build_frame_info): Likewise.
(decode_frame_entry_1): Likewise.
* dwarf2expr.c (new_dwarf_expr_context): Likewise.
* dwarf2loc.c (dwarf2_compile_expr_to_ax): Likewise.
* dwarf2read.c (dwarf2_has_info): Likewise.
(create_signatured_type_table_from_index): Likewise.
(dwarf2_read_index): Likewise.
(dw2_get_file_names_reader): Likewise.
(create_all_type_units): Likewise.
(read_cutu_die_from_dwo): Likewise.
(init_tu_and_read_dwo_dies): Likewise.
(init_cutu_and_read_dies): Likewise.
(create_all_comp_units): Likewise.
(queue_comp_unit): Likewise.
(inherit_abstract_dies): Likewise.
(read_call_site_scope): Likewise.
(dwarf2_add_field): Likewise.
(dwarf2_add_typedef): Likewise.
(dwarf2_add_member_fn): Likewise.
(attr_to_dynamic_prop): Likewise.
(abbrev_table_alloc_abbrev): Likewise.
(abbrev_table_read_table): Likewise.
(add_include_dir): Likewise.
(add_file_name): Likewise.
(dwarf_decode_line_header): Likewise.
(dwarf2_const_value_attr): Likewise.
(dwarf_alloc_block): Likewise.
(parse_macro_definition): Likewise.
(set_die_type): Likewise.
(write_psymtabs_to_index): Likewise.
(create_cus_from_index): Likewise.
(dwarf2_create_include_psymtab): Likewise.
(process_psymtab_comp_unit_reader): Likewise.
(build_type_psymtab_dependencies): Likewise.
(read_comp_units_from_section): Likewise.
(compute_compunit_symtab_includes): Likewise.
(create_dwo_unit_in_dwp_v1): Likewise.
(create_dwo_unit_in_dwp_v2): Likewise.
(read_func_scope): Likewise.
(process_structure_scope): Likewise.
(mark_common_block_symbol_computed): Likewise.
(load_partial_dies): Likewise.
(dwarf2_symbol_mark_computed): Likewise.
* elfread.c (elf_symfile_segments): Likewise.
(elf_read_minimal_symbols): Likewise.
* environ.c (make_environ): Likewise.
* eval.c (evaluate_subexp_standard): Likewise.
* event-loop.c (create_file_handler): Likewise.
(create_async_signal_handler): Likewise.
(create_async_event_handler): Likewise.
(create_timer): Likewise.
* exec.c (build_section_table): Likewise.
* fbsd-nat.c (fbsd_remember_child): Likewise.
* fork-child.c (fork_inferior): Likewise.
* frv-tdep.c (new_variant): Likewise.
* gdbarch.sh (gdbarch_alloc): Likewise.
(append_name): Likewise.
* gdbtypes.c (rank_function): Likewise.
(copy_type_recursive): Likewise.
(add_dyn_prop): Likewise.
* gnu-nat.c (make_proc): Likewise.
(make_inf): Likewise.
(gnu_write_inferior): Likewise.
* gnu-v3-abi.c (build_gdb_vtable_type): Likewise.
(build_std_type_info_type): Likewise.
* guile/scm-param.c (compute_enum_list): Likewise.
* guile/scm-utils.c (gdbscm_parse_function_args): Likewise.
* guile/scm-value.c (gdbscm_value_call): Likewise.
* h8300-tdep.c (h8300_gdbarch_init): Likewise.
* hppa-tdep.c (hppa_init_objfile_priv_data): Likewise.
(read_unwind_info): Likewise.
* ia64-tdep.c (ia64_gdbarch_init): Likewise.
* infcall.c (dummy_frame_context_saver_setup): Likewise.
(call_function_by_hand_dummy): Likewise.
* infcmd.c (step_once): Likewise.
(finish_forward): Likewise.
(attach_command): Likewise.
(notice_new_inferior): Likewise.
* inferior.c (add_inferior_silent): Likewise.
* infrun.c (add_displaced_stepping_state): Likewise.
(save_infcall_control_state): Likewise.
(save_inferior_ptid): Likewise.
(_initialize_infrun): Likewise.
* jit.c (bfd_open_from_target_memory): Likewise.
(jit_gdbarch_data_init): Likewise.
* language.c (add_language): Likewise.
* linespec.c (decode_line_2): Likewise.
* linux-nat.c (add_to_pid_list): Likewise.
(add_initial_lwp): Likewise.
* linux-thread-db.c (add_thread_db_info): Likewise.
(record_thread): Likewise.
(info_auto_load_libthread_db): Likewise.
* m32c-tdep.c (m32c_gdbarch_init): Likewise.
* m68hc11-tdep.c (m68hc11_gdbarch_init): Likewise.
* m68k-tdep.c (m68k_gdbarch_init): Likewise.
* m88k-tdep.c (m88k_analyze_prologue): Likewise.
* macrocmd.c (macro_define_command): Likewise.
* macroexp.c (gather_arguments): Likewise.
* macroscope.c (sal_macro_scope): Likewise.
* macrotab.c (new_macro_table): Likewise.
* mdebugread.c (push_parse_stack): Likewise.
(parse_partial_symbols): Likewise.
(parse_symbol): Likewise.
(psymtab_to_symtab_1): Likewise.
(new_block): Likewise.
(new_psymtab): Likewise.
(mdebug_build_psymtabs): Likewise.
(add_pending): Likewise.
(elfmdebug_build_psymtabs): Likewise.
* mep-tdep.c (mep_gdbarch_init): Likewise.
* mi/mi-main.c (mi_execute_command): Likewise.
* mi/mi-parse.c (mi_parse_argv): Likewise.
* minidebug.c (lzma_open): Likewise.
* minsyms.c (terminate_minimal_symbol_table): Likewise.
* mips-linux-nat.c (mips_linux_insert_watchpoint): Likewise.
* mips-tdep.c (mips_gdbarch_init): Likewise.
* mn10300-tdep.c (mn10300_gdbarch_init): Likewise.
* msp430-tdep.c (msp430_gdbarch_init): Likewise.
* mt-tdep.c (mt_registers_info): Likewise.
* nat/aarch64-linux.c (aarch64_linux_new_thread): Likewise.
* nat/linux-btrace.c (linux_enable_bts): Likewise.
(linux_enable_pt): Likewise.
* nat/linux-osdata.c (linux_xfer_osdata_processes): Likewise.
(linux_xfer_osdata_processgroups): Likewise.
* nios2-tdep.c (nios2_gdbarch_init): Likewise.
* nto-procfs.c (procfs_meminfo): Likewise.
* objc-lang.c (start_msglist): Likewise.
(selectors_info): Likewise.
(classes_info): Likewise.
(find_methods): Likewise.
* objfiles.c (allocate_objfile): Likewise.
(update_section_map): Likewise.
* osabi.c (gdbarch_register_osabi): Likewise.
(gdbarch_register_osabi_sniffer): Likewise.
* parse.c (start_arglist): Likewise.
* ppc-linux-nat.c (hwdebug_find_thread_points_by_tid): Likewise.
(hwdebug_insert_point): Likewise.
* printcmd.c (display_command): Likewise.
(ui_printf): Likewise.
* procfs.c (create_procinfo): Likewise.
(load_syscalls): Likewise.
(proc_get_LDT_entry): Likewise.
(proc_update_threads): Likewise.
* prologue-value.c (make_pv_area): Likewise.
(pv_area_store): Likewise.
* psymtab.c (extend_psymbol_list): Likewise.
(init_psymbol_list): Likewise.
(allocate_psymtab): Likewise.
* python/py-inferior.c (add_thread_object): Likewise.
* python/py-param.c (compute_enum_values): Likewise.
* python/py-value.c (valpy_call): Likewise.
* python/py-varobj.c (py_varobj_iter_next): Likewise.
* python/python.c (ensure_python_env): Likewise.
* record-btrace.c (record_btrace_start_replaying): Likewise.
* record-full.c (record_full_reg_alloc): Likewise.
(record_full_mem_alloc): Likewise.
(record_full_end_alloc): Likewise.
(record_full_core_xfer_partial): Likewise.
* regcache.c (get_thread_arch_aspace_regcache): Likewise.
* remote-fileio.c (remote_fileio_init_fd_map): Likewise.
* remote-notif.c (remote_notif_state_allocate): Likewise.
* remote.c (demand_private_info): Likewise.
(remote_notif_stop_alloc_reply): Likewise.
(remote_enable_btrace): Likewise.
* reverse.c (save_bookmark_command): Likewise.
* rl78-tdep.c (rl78_gdbarch_init): Likewise.
* rx-tdep.c (rx_gdbarch_init): Likewise.
* s390-linux-nat.c (s390_insert_watchpoint): Likewise.
* ser-go32.c (dos_get_tty_state): Likewise.
(dos_copy_tty_state): Likewise.
* ser-mingw.c (ser_windows_open): Likewise.
(ser_console_wait_handle): Likewise.
(ser_console_get_tty_state): Likewise.
(make_pipe_state): Likewise.
(net_windows_open): Likewise.
* ser-unix.c (hardwire_get_tty_state): Likewise.
(hardwire_copy_tty_state): Likewise.
* solib-aix.c (solib_aix_new_lm_info): Likewise.
* solib-dsbt.c (dsbt_current_sos): Likewise.
(dsbt_relocate_main_executable): Likewise.
* solib-frv.c (frv_current_sos): Likewise.
(frv_relocate_main_executable): Likewise.
* solib-spu.c (spu_bfd_fopen): Likewise.
* solib-svr4.c (lm_info_read): Likewise.
(svr4_copy_library_list): Likewise.
(svr4_default_sos): Likewise.
* source.c (find_source_lines): Likewise.
(line_info): Likewise.
(add_substitute_path_rule): Likewise.
* spu-linux-nat.c (spu_bfd_open): Likewise.
* spu-tdep.c (info_spu_dma_cmdlist): Likewise.
* stabsread.c (dbx_lookup_type): Likewise.
(read_type): Likewise.
(read_member_functions): Likewise.
(read_struct_fields): Likewise.
(read_baseclasses): Likewise.
(read_args): Likewise.
(_initialize_stabsread): Likewise.
* stack.c (func_command): Likewise.
* stap-probe.c (handle_stap_probe): Likewise.
* symfile.c (addrs_section_sort): Likewise.
(addr_info_make_relative): Likewise.
(load_section_callback): Likewise.
(add_symbol_file_command): Likewise.
(init_filename_language_table): Likewise.
* symtab.c (create_filename_seen_cache): Likewise.
(sort_search_symbols_remove_dups): Likewise.
(search_symbols): Likewise.
* target.c (make_cleanup_restore_target_terminal): Likewise.
* thread.c (new_thread): Likewise.
(enable_thread_stack_temporaries): Likewise.
(make_cleanup_restore_current_thread): Likewise.
(thread_apply_all_command): Likewise.
* tic6x-tdep.c (tic6x_gdbarch_init): Likewise.
* top.c (gdb_readline_wrapper): Likewise.
* tracefile-tfile.c (tfile_trace_file_writer_new): Likewise.
* tracepoint.c (trace_find_line_command): Likewise.
(all_tracepoint_actions_and_cleanup): Likewise.
(make_cleanup_restore_current_traceframe): Likewise.
(get_uploaded_tp): Likewise.
(get_uploaded_tsv): Likewise.
* tui/tui-data.c (tui_alloc_generic_win_info): Likewise.
(tui_alloc_win_info): Likewise.
(tui_alloc_content): Likewise.
(tui_add_content_elements): Likewise.
* tui/tui-disasm.c (tui_find_disassembly_address): Likewise.
(tui_set_disassem_content): Likewise.
* ui-file.c (ui_file_new): Likewise.
(stdio_file_new): Likewise.
(tee_file_new): Likewise.
* utils.c (make_cleanup_restore_integer): Likewise.
(add_internal_problem_command): Likewise.
* v850-tdep.c (v850_gdbarch_init): Likewise.
* valops.c (find_oload_champ): Likewise.
* value.c (allocate_value_lazy): Likewise.
(record_latest_value): Likewise.
(create_internalvar): Likewise.
* varobj.c (install_variable): Likewise.
(new_variable): Likewise.
(new_root_variable): Likewise.
(cppush): Likewise.
(_initialize_varobj): Likewise.
* windows-nat.c (windows_make_so): Likewise.
* x86-nat.c (x86_add_process): Likewise.
* xcoffread.c (arrange_linetable): Likewise.
(allocate_include_entry): Likewise.
(process_linenos): Likewise.
(SYMBOL_DUP): Likewise.
(xcoff_start_psymtab): Likewise.
(xcoff_end_psymtab): Likewise.
* xml-support.c (gdb_xml_parse_attr_ulongest): Likewise.
* xtensa-tdep.c (xtensa_register_type): Likewise.
* gdbarch.c: Regenerate.
* gdbarch.h: Regenerate.
gdb/gdbserver/ChangeLog:
* ax.c (gdb_parse_agent_expr): Likewise.
(compile_bytecodes): Likewise.
* dll.c (loaded_dll): Likewise.
* event-loop.c (append_callback_event): Likewise.
(create_file_handler): Likewise.
(create_file_event): Likewise.
* hostio.c (handle_open): Likewise.
* inferiors.c (add_thread): Likewise.
(add_process): Likewise.
* linux-aarch64-low.c (aarch64_linux_new_process): Likewise.
* linux-arm-low.c (arm_new_process): Likewise.
(arm_new_thread): Likewise.
* linux-low.c (add_to_pid_list): Likewise.
(linux_add_process): Likewise.
(handle_extended_wait): Likewise.
(add_lwp): Likewise.
(enqueue_one_deferred_signal): Likewise.
(enqueue_pending_signal): Likewise.
(linux_resume_one_lwp_throw): Likewise.
(linux_resume_one_thread): Likewise.
(linux_read_memory): Likewise.
(linux_write_memory): Likewise.
* linux-mips-low.c (mips_linux_new_process): Likewise.
(mips_linux_new_thread): Likewise.
(mips_add_watchpoint): Likewise.
* linux-x86-low.c (initialize_low_arch): Likewise.
* lynx-low.c (lynx_add_process): Likewise.
* mem-break.c (set_raw_breakpoint_at): Likewise.
(set_breakpoint): Likewise.
(add_condition_to_breakpoint): Likewise.
(add_commands_to_breakpoint): Likewise.
(clone_agent_expr): Likewise.
(clone_one_breakpoint): Likewise.
* regcache.c (new_register_cache): Likewise.
* remote-utils.c (look_up_one_symbol): Likewise.
* server.c (queue_stop_reply): Likewise.
(start_inferior): Likewise.
(queue_stop_reply_callback): Likewise.
(handle_target_event): Likewise.
* spu-low.c (fetch_ppc_memory): Likewise.
(store_ppc_memory): Likewise.
* target.c (set_target_ops): Likewise.
* thread-db.c (thread_db_load_search): Likewise.
(try_thread_db_load_1): Likewise.
* tracepoint.c (add_tracepoint): Likewise.
(add_tracepoint_action): Likewise.
(create_trace_state_variable): Likewise.
(cmd_qtdpsrc): Likewise.
(cmd_qtro): Likewise.
(add_while_stepping_state): Likewise.
* win32-low.c (child_add_thread): Likewise.
(get_image_name): Likewise.
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In all-stop mode, if the current thread disappears while stopping all
threads, gdbserver calls set_desired_thread(0) ['0' means "I want the
continue thread"] which just picks the first thread in the list.
This looks like a dangerous thing to do. GDBserver continues
processing whatever it was doing, but to the wrong thread. If
debugging more than one process, we may even pick the wrong process.
Instead, GDBserver should detect the situation and bail out of
whatever is was doing.
The backends used to pay attention to the set 'cont_thread' (the Hc
thread, used in the old way to resume threads, before vCont), but all
such 'cont_thread' checks have been eliminated meanwhile. The
remaining implicit dependencies that I found on there being a selected
thread in the backends are in the Ctrl-C handling, which some backends
use as thread to send a signal to. Even that seems to me to be better
handled by always using the first thread in the list or by using the
signal_pid PID.
In order to make this a systematic approach, I'm making
set_desired_thread never fallback to a random thread, and instead end
up with current_thread == NULL, like already done in non-stop mode.
Then I updated all callers to handle the situation.
I stumbled on this while fixing other bugs exposed by
gdb.threads/fork-plus-threads.exp test. The problems I saw were fixed
in a different way, but in any case, I think the potential for
problems is more or less obvious, and the resulting code looks a bit
less magical to me.
Tested on x86-64 Fedora 20, w/ native-extended-gdbserver board.
gdb/gdbserver/ChangeLog:
2015-08-21 Pedro Alves <palves@redhat.com>
* linux-low.c (wait_for_sigstop): Always switch to no thread
selected if the previously current thread dies.
* lynx-low.c (lynx_request_interrupt): Use the first thread's
process instead of the current thread's.
* remote-utils.c (input_interrupt): Don't check if there's no
current thread.
* server.c (gdb_read_memory, gdb_write_memory): If setting the
current thread to the general thread fails, error out.
(handle_qxfer_auxv, handle_qxfer_libraries)
(handle_qxfer_libraries_svr4, handle_qxfer_siginfo)
(handle_qxfer_spu, handle_qxfer_statictrace, handle_qxfer_fdpic)
(handle_query): Check if there's a thread selected instead of
checking whether there's any thread in the thread list.
(handle_qxfer_threads, handle_qxfer_btrace)
(handle_qxfer_btrace_conf): Don't error out early if there's no
thread in the thread list.
(handle_v_cont, myresume): Don't set the current thread to the
continue thread.
(process_serial_event) <Hg handling>: Also set thread_id if the
previous general thread is still alive.
(process_serial_event) <g/G handling>: If setting the current
thread to the general thread fails, error out.
* spu-low.c (spu_resume, spu_request_interrupt): Use the first
thread's lwp instead of the current thread's.
* target.c (set_desired_thread): If the desired thread was not
found, leave the current thread pointing to NULL. Return an int
(boolean) indicating success.
* target.h (set_desired_thread): Change return type to int.
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ddc98fbf2fd9e244a215a4d09e559180dc573a14 Create empty nat/linux-maps.[ch] and common/target-utils.[ch]
6e5b4429db0d66e2d0b27e1bcfe4709f3dae73ed Move gdb_regex* to common/
f7af1fcd759fa126612018a5916cf808df7bb8bc Prepare linux_find_memory_regions_full & co. for move
9904185cfde13d6c6849f1f042c8e3b74974cf08 Move linux_find_memory_regions_full & co.
700ca40f6fc1addd7238f4ab57f76c095ad3c99f gdbserver build-id attribute generator
ca5268b6be265580b91ef75c1a1a9815f581ae42 Validate symbol file using build-id
0a94970d663a053c523f23ac0d71deb25a77f709 Tests for validate symbol file using build-id
gdb/ChangeLog
2015-07-15 Jan Kratochvil <jan.kratochvil@redhat.com>
Revert the previous 6 commits:
Create empty nat/linux-maps.[ch] and common/target-utils.[ch].
Move gdb_regex* to common/
Prepare linux_find_memory_regions_full & co. for move
Move linux_find_memory_regions_full & co.
gdbserver build-id attribute generator
Validate symbol file using build-id
gdb/gdbserver/ChangeLog
2015-07-15 Jan Kratochvil <jan.kratochvil@redhat.com>
Revert the previous 3 commits:
Move gdb_regex* to common/
Move linux_find_memory_regions_full & co.
gdbserver build-id attribute generator
gdb/doc/ChangeLog
2015-07-15 Jan Kratochvil <jan.kratochvil@redhat.com>
Revert the previous 2 commits:
gdbserver build-id attribute generator
Validate symbol file using build-id
gdb/testsuite/ChangeLog
2015-07-15 Jan Kratochvil <jan.kratochvil@redhat.com>
Revert the previous commit:
Tests for validate symbol file using build-id.
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This should be just a move with no changes.
gdb/ChangeLog
2015-07-15 Aleksandar Ristovski <aristovski@qnx.com
Jan Kratochvil <jan.kratochvil@redhat.com>
Move linux_find_memory_regions_full & co.
* linux-tdep.c (nat/linux-maps.h): Include.
(gdb_regex.h): Remove the include.
(enum filterflags, struct smaps_vmflags, read_mapping, decode_vmflags)
(mapping_is_anonymous_p, dump_mapping_p): Moved to nat/linux-maps.c.
(linux_find_memory_region_ftype): Moved typedef to nat/linux-maps.h.
(linux_find_memory_regions_full): Moved definition to nat/linux-maps.c.
* nat/linux-maps.c: Include ctype.h, target/target-utils.h, gdb_regex.h
and target/target.h.
(struct smaps_vmflags, read_mapping, decode_vmflags)
(mapping_is_anonymous_p, dump_mapping_p): Move from linux-tdep.c.
(linux_find_memory_regions_full): Move from linux-tdep.c.
* nat/linux-maps.h (read_mapping): New declaration.
(linux_find_memory_region_ftype, enum filterflags): Moved from
linux-tdep.c.
(linux_find_memory_regions_full): New declaration.
* target.c (target/target-utils.h): Include.
(read_alloc_pread_ftype): Moved typedef to target/target-utils.h.
(read_alloc, read_stralloc_func_ftype, read_stralloc): Moved
definitions to target/target-utils.c.
* target.h (target_fileio_read_stralloc): Move it to target/target.h.
* target/target-utils.c (read_alloc, read_stralloc): Move definitions
from target.c.
* target/target-utils.h (read_alloc_pread_ftype): New typedef.
(read_alloc): New declaration.
(read_stralloc_func_ftype): New typedef.
(read_stralloc): New declaration.
* target/target.h (target_fileio_read_stralloc): Move it from target.h.
gdb/gdbserver/ChangeLog
2015-07-15 Aleksandar Ristovski <aristovski@qnx.com
Jan Kratochvil <jan.kratochvil@redhat.com>
* target.c: Include target/target-utils.h and fcntl.h.
(target_fileio_read_stralloc_1_pread, target_fileio_read_stralloc_1)
(target_fileio_read_stralloc): New functions.
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gdb/ChangeLog:
Update year range in copyright notice of all files.
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This commit renames target_stop_ptid as target_stop_and_wait and
target_continue_ptid as target_continue_no_signal. Comments are
updated to more fully describe the functions' behaviour.
gdb/ChangeLog:
* target/target.h (target_stop_ptid): Renamed as...
(target_stop_and_wait): New function. Updated comment.
All uses updated.
(target_continue_ptid): Renamed as...
(target_continue_no_signal): New function. Updated comment.
All uses updated.
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GDB has a function named "current_inferior" and gdbserver has a global
variable named "current_inferior", but the two are not equivalent;
indeed, gdbserver does not have any real equivalent of what GDB calls
an inferior. What gdbserver's "current_inferior" is actually pointing
to is a structure describing the current thread. This commit renames
current_inferior as current_thread in gdbserver to clarify this. It
also renames the function "set_desired_inferior" to "set_desired_thread"
and renames various local variables from foo_inferior to foo_thread.
gdb/gdbserver/ChangeLog:
* inferiors.h (current_inferior): Renamed as...
(current_thread): New variable. All uses updated.
* linux-low.c (get_pc): Renamed saved_inferior as saved_thread.
(maybe_move_out_of_jump_pad): Likewise.
(cancel_breakpoint): Likewise.
(linux_low_filter_event): Likewise.
(wait_for_sigstop): Likewise.
(linux_resume_one_lwp): Likewise.
(need_step_over_p): Likewise.
(start_step_over): Likewise.
(linux_stabilize_threads): Renamed save_inferior as saved_thread.
* linux-x86-low.c (x86_linux_update_xmltarget): Likewise.
* proc-service.c (ps_lgetregs): Renamed reg_inferior as reg_thread
and save_inferior as saved_thread.
* regcache.c (get_thread_regcache): Renamed saved_inferior as
saved_thread.
(regcache_invalidate_thread): Likewise.
* remote-utils.c (prepare_resume_reply): Likewise.
* thread-db.c (thread_db_get_tls_address): Likewise.
(disable_thread_event_reporting): Likewise.
(remove_thread_event_breakpoints): Likewise.
* tracepoint.c (gdb_agent_about_to_close): Renamed save_inferior
as saved_thread.
* target.h (set_desired_inferior): Renamed as...
(set_desired_thread): New declaration. All uses updated.
* server.c (myresume): Updated comment to reference thread instead
of inferior.
(handle_serial_event): Likewise.
(handle_target_event): Likewise.
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This commit introduces two new functions to stop and restart target
processes that shared code can use and that clients must implement.
It also changes some shared code to use these functions.
gdb/ChangeLog:
* target/target.h (target_stop_ptid, target_continue_ptid):
Declare.
* target.c (target_stop_ptid, target_continue_ptid): New
functions.
* common/agent.c [!GDBSERVER]: Don't include infrun.h.
(agent_run_command): Always use target_stop_ptid and
target_continue_ptid.
gdb/gdbserver/ChangeLog:
* target.c (target_stop_ptid, target_continue_ptid): New
functions.
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This introduces target/target.h. This file declares some functions
that the shared code can use and that clients must implement. It also
changes some shared code to use these functions.
gdb/ChangeLog:
* target/target.h: New file.
* Makefile.in (HFILES_NO_SRCDIR): Add target/target.h.
* target.h: Include target/target.h.
(target_read_memory, target_write_memory): Don't declare.
* target.c (target_read_uint32): New function.
* common/agent.c: Include target/target.h.
[!GDBSERVER]: Don't include target.h.
(helper_thread_id): Type changed to uint32_t.
(agent_get_helper_thread_id): Use target_read_uint32.
(agent_run_command): Always use target_read_memory and
target_write_memory.
(agent_capability): Type changed to uint32_t.
(agent_capability_check): Use target_read_uint32.
gdb/gdbserver/ChangeLog:
* target.h: Include target/target.h.
* target.c (target_read_memory, target_read_uint32)
(target_write_memory): New functions.
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* dll.c (clear_dlls): Replace accessing list implemention details
with API function.
* gdbthread.h (get_first_thread): Declare.
* inferiors.c (for_each_inferior_with_data): New function.
(get_first_thread): New function.
(find_thread_ptid): Simplify.
(get_first_inferior): New function.
(clear_list): Delete.
(one_inferior_p): New function.
(clear_inferior_list): New function.
(clear_inferiors): Update.
* inferiors.h (for_each_inferior_with_data): Declare.
(clear_inferior_list): Declare.
(one_inferior_p): Declare.
(get_first_inferior): Declare.
* linux-low.c (linux_wait_for_event): Replace accessing list
implemention details with API function.
* server.c (target_running): Ditto.
(accumulate_file_name_length): New function.
(emit_dll_description): New function.
(handle_qxfer_libraries): Replace accessing list implemention
details with API function.
(handle_qxfer_threads_worker): New function.
(handle_qxfer_threads_proper): Replace accessing list implemention
details with API function.
(handle_query): Ditto.
(visit_actioned_threads_callback_ftype): New typedef.
(visit_actioned_threads_data): New struct.
(visit_actioned_threads): Rewrite to be find_inferior callback.
(resume): Call find_inferior.
(handle_status): Replace accessing list implemention
details with API function.
(process_serial_event): Replace accessing list implemention details
with API function.
* target.c (set_desired_inferior): Replace accessing list implemention
details with API function.
* tracepoint.c (same_process_p): New function.
(gdb_agent_about_to_close): Replace accessing list implemention
details with API function.
* win32-low.c (child_delete_thread): Replace accessing list
implemention details with API function.
(match_dll_by_basename): New function.
(dll_is_loaded_by_basename): New function.
(win32_ensure_ntdll_loaded): Replace accessing list implemention
details call to dll_is_loaded_by_basename.
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This is a preparatory patch that achieves two goals:
. Makes the initial event handling more similar to GDB's;
. Opens the door for implementing post-inititial-handling
operations.
At the moment, this is only done on Windows, where the
post-initial-handling is going to be needed (in the context of
Windows 2012). And because we're close to creating the gdb 7.7
branch, making that change for all platforms is a little more
risk that we'd like. So the change is currently implemented
on Windows.
gdb/gdbserver/ChangeLog:
* target.c (mywait): Set OURSTATUS->KIND to TARGET_WAITKIND_STOPPED
if equal to TARGET_WAITKIND_LOADED.
* win32-low.c (cached_status): New static global.
(win32_wait): Add declaration.
(do_initial_child_stuff): Flush all initial pending debug events
up to the initial breakpoint.
(win32_wait): If CACHED_STATUS was set, return that instead
of doing a real wait. Remove the code resuming the execution
of the inferior after receiving a TARGET_WAITKIND_LOADED event
during the initial phase. Also remove the code changing
OURSTATUS->KIND from TARGET_WAITKIND_LOADED to
TARGET_WAITKIND_STOPPED.
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If we make gdbserver gdb_continue_to_end actually expect a process
exit with GDBserver, we get many testsuite failures with the remote
stdio board:
-PASS: gdb.arch/amd64-disp-step.exp: continue until exit at amd64-disp-step
+FAIL: gdb.arch/amd64-disp-step.exp: continue until exit at amd64-disp-step (the program exited)
-PASS: gdb.base/break.exp: continue until exit at recursive next test
+FAIL: gdb.base/break.exp: continue until exit at recursive next test (the program exited)
-PASS: gdb.base/chng-syms.exp: continue until exit at breakpoint first time through
+FAIL: gdb.base/chng-syms.exp: continue until exit at breakpoint first time through (the program exited)
... etc. ...
This is what the log shows for all of them:
(gdb) continue
Continuing.
Child exited with status 0
GDBserver exiting
[Inferior 1 (process 22721) exited normally]
(gdb) FAIL: gdb.arch/amd64-disp-step.exp: continue until exit (the program exited)
The problem is the whole "Child exited ... GDBserver exiting" output,
that comes out of GDBserver, and that the testsuite is not expecting.
I pondered somehow making the testsuite adjust to this. But,
testsuite aside, I think GDBserver should not be outputting this at
all when GDB is connected through stdio. GDBserver will be printing
this in GDB's console, but the user can already tell from the regular
output that the inferior is gone.
Again, manually:
(gdb) tar remote | ./gdbserver/gdbserver - program
Remote debugging using | ./gdbserver/gdbserver - program
Process program created; pid = 22486
stdin/stdout redirected
Remote debugging using stdio
done.
Loaded symbols for /lib64/ld-linux-x86-64.so.2
0x000000323d001530 in _start () from /lib64/ld-linux-x86-64.so.2
(gdb) c
Continuing.
Child exited with status 1
^^^^^^^^^^^^^^^^^^^^^^^^^^
GDBserver exiting
^^^^^^^^^^^^^^^^^
[Inferior 1 (process 22486) exited with code 01]
(gdb)
Suppressing those two lines makes the output be exactly like when
debugging against a remote tcp gdbserver:
(gdb) c
Continuing.
[Inferior 1 (process 22914) exited with code 01]
(gdb)
2013-10-02 Pedro Alves <palves@redhat.com>
* server.c (process_serial_event): Don't output "GDBserver
exiting" if GDB is connected through stdio.
* target.c (mywait): Likewise, be silent if GDB is connected
through stdio.
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gdb/gdbserver/
2013-09-05 Pedro Alves <palves@redhat.com>
* ax.c, linux-low.c, linux-x86-low.c, server.c: Include
tracepoint.h.
* server.h (IPA_BUFSIZ, initialize_tracepoint, tracing)
(disconnected_tracing, tracepoint_look_up_symbols, stop_tracing
(handle_tracepoint_general_set, handle_tracepoint_query)
(tracepoint_finished_step, tracepoint_was_hit)
(release_while_stepping_state_list, current_traceframe)
(in_readonly_region, traceframe_read_mem)
(fetch_traceframe_registers, traceframe_read_sdata)
(traceframe_read_info, struct fast_tpoint_collect_status)
(fast_tracepoint_collecting, force_unlock_trace_buffer)
(handle_tracepoit_bkpts, initialize_low_tracepoint)
(supply_fast_tracepoint_registers)
(supply_static_tracepoint_registers, set_trampoline_buffer_space)
(ipa_tdesc, claim_trampoline_space)
(have_fast_tracepoint_trampoline_buffer, gdb_agent_about_to_close)
(agent_mem_read, agent_get_trace_state_variable_value)
(agent_set_trace_state_variable_value, agent_tsv_read)
(agent_mem_read_string, get_raw_reg_func_addr)
(get_get_tsv_func_addr, get_set_tsv_func_addr): Move to ...
* tracepoint.h: ... this new file.
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* Makefile.in (SFILES): Add common/target-common.c.
Add common/target-common.h to headers.
(COMMON_OBS): Add target-common.o.
(target-common.o): New target.
* linux-nat.h (resume_kind): Move to common/target-common.h.
* target.c (target_waitstatus_to_string): Move to
common/target-common.c.
* target.h: Include target-common.h.
(target_waitkind): Move to common/target-common.h.
(target_waitstatus): Likewise.
(TARGET_WNOHANG): Likewise.
* common/target-common.c: New file.
* common/target-common.h: New file.
gdb/gdbserver/
* Makefile.in (SFILES): /common/target-common.c.
(OBS): Add target-common.o.
(server_h): Add $(srcdir)/../common/target-common.h.
(target-common.o): New target.
* server.c (queue_stop_reply_callback): Free
status string after use.
* target.c (target_waitstatus_to_string): Remove.
* target.h: Include target-common.h.
(resume_kind): Likewise.
(target_waitkind): Likewise.
(target_waitstatus): Likewise.
(TARGET_WNOHANG): Likewise.
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Two modifications:
1. The addition of 2013 to the copyright year range for every file;
2. The use of a single year range, instead of potentially multiple
year ranges, as approved by the FSF.
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PR remote/14161.
* server.h: Declare gdb_agent_about_to_close.
* target.c (kill_inferior): Include "agent.h".
New. Send command 'kill'.
* target.h (kill_inferior): Removed macro.
* tracepoint.c (gdb_agent_about_to_close): New.
(gdb_agent_helper_thread): Handle command 'close'.
Wait endlessly until the inferior stops.
Install gdb_agent_remove_socket to atexit hook.
(agent_socket_name): New static variable.
(gdb_agent_socket_init): Replace local variable 'name' with
'agent_socket_name'.
(gdb_agent_remove_socket): New.
gdb/doc/
* gdb.texinfo (IPA Protocol Commands): Document new command
'close'.
gdb/testsuite/
KFAIL for PR remote/14161.
* gdb.trace/strace.exp (strace_remove_socket): kfail for native.
Cleanup socket files.
(strace_info_marker): Detach inferior.
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