5b6d1e4fa4
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.
1245 lines
36 KiB
C
1245 lines
36 KiB
C
/* Solaris threads debugging interface.
|
||
|
||
Copyright (C) 1996-2020 Free Software Foundation, Inc.
|
||
|
||
This file is part of GDB.
|
||
|
||
This program is free software; you can redistribute it and/or modify
|
||
it under the terms of the GNU General Public License as published by
|
||
the Free Software Foundation; either version 3 of the License, or
|
||
(at your option) any later version.
|
||
|
||
This program is distributed in the hope that it will be useful,
|
||
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
GNU General Public License for more details.
|
||
|
||
You should have received a copy of the GNU General Public License
|
||
along with this program. If not, see <http://www.gnu.org/licenses/>. */
|
||
|
||
/* This module implements a sort of half target that sits between the
|
||
machine-independent parts of GDB and the /proc interface (procfs.c)
|
||
to provide access to the Solaris user-mode thread implementation.
|
||
|
||
Solaris threads are true user-mode threads, which are invoked via
|
||
the thr_* and pthread_* (native and POSIX respectively) interfaces.
|
||
These are mostly implemented in user-space, with all thread context
|
||
kept in various structures that live in the user's heap. These
|
||
should not be confused with lightweight processes (LWPs), which are
|
||
implemented by the kernel, and scheduled without explicit
|
||
intervention by the process.
|
||
|
||
Just to confuse things a little, Solaris threads (both native and
|
||
POSIX) are actually implemented using LWPs. In general, there are
|
||
going to be more threads than LWPs. There is no fixed
|
||
correspondence between a thread and an LWP. When a thread wants to
|
||
run, it gets scheduled onto the first available LWP and can
|
||
therefore migrate from one LWP to another as time goes on. A
|
||
sleeping thread may not be associated with an LWP at all!
|
||
|
||
To make it possible to mess with threads, Sun provides a library
|
||
called libthread_db.so.1 (not to be confused with
|
||
libthread_db.so.0, which doesn't have a published interface). This
|
||
interface has an upper part, which it provides, and a lower part
|
||
which we provide. The upper part consists of the td_* routines,
|
||
which allow us to find all the threads, query their state, etc...
|
||
The lower part consists of all of the ps_*, which are used by the
|
||
td_* routines to read/write memory, manipulate LWPs, lookup
|
||
symbols, etc... The ps_* routines actually do most of their work
|
||
by calling functions in procfs.c. */
|
||
|
||
#include "defs.h"
|
||
#include <thread.h>
|
||
#include <proc_service.h>
|
||
#include <thread_db.h>
|
||
#include "gdbthread.h"
|
||
#include "target.h"
|
||
#include "inferior.h"
|
||
#include <fcntl.h>
|
||
#include <sys/stat.h>
|
||
#include <dlfcn.h>
|
||
#include "gdbcmd.h"
|
||
#include "gdbcore.h"
|
||
#include "regcache.h"
|
||
#include "solib.h"
|
||
#include "symfile.h"
|
||
#include "observable.h"
|
||
#include "procfs.h"
|
||
#include "symtab.h"
|
||
#include "minsyms.h"
|
||
#include "objfiles.h"
|
||
|
||
static const target_info thread_db_target_info = {
|
||
"solaris-threads",
|
||
N_("Solaris threads and pthread."),
|
||
N_("Solaris threads and pthread support.")
|
||
};
|
||
|
||
class sol_thread_target final : public target_ops
|
||
{
|
||
public:
|
||
const target_info &info () const override
|
||
{ return thread_db_target_info; }
|
||
|
||
strata stratum () const override { return thread_stratum; }
|
||
|
||
void detach (inferior *, int) override;
|
||
ptid_t wait (ptid_t, struct target_waitstatus *, int) override;
|
||
void resume (ptid_t, int, enum gdb_signal) override;
|
||
void mourn_inferior () override;
|
||
std::string pid_to_str (ptid_t) override;
|
||
ptid_t get_ada_task_ptid (long lwp, long thread) override;
|
||
|
||
void fetch_registers (struct regcache *, int) override;
|
||
void store_registers (struct regcache *, int) override;
|
||
|
||
enum target_xfer_status xfer_partial (enum target_object object,
|
||
const char *annex,
|
||
gdb_byte *readbuf,
|
||
const gdb_byte *writebuf,
|
||
ULONGEST offset, ULONGEST len,
|
||
ULONGEST *xfered_len) override;
|
||
|
||
bool thread_alive (ptid_t ptid) override;
|
||
void update_thread_list () override;
|
||
};
|
||
|
||
static sol_thread_target sol_thread_ops;
|
||
|
||
/* Prototypes for supply_gregset etc. */
|
||
#include "gregset.h"
|
||
|
||
/* This struct is defined by us, but mainly used for the proc_service
|
||
interface. We don't have much use for it, except as a handy place
|
||
to get a real PID for memory accesses. */
|
||
|
||
struct ps_prochandle
|
||
{
|
||
ptid_t ptid;
|
||
};
|
||
|
||
struct string_map
|
||
{
|
||
int num;
|
||
const char *str;
|
||
};
|
||
|
||
static struct ps_prochandle main_ph;
|
||
static td_thragent_t *main_ta;
|
||
static int sol_thread_active = 0;
|
||
|
||
/* Default definitions: These must be defined in tm.h if they are to
|
||
be shared with a process module such as procfs. */
|
||
|
||
/* Types of the libthread_db functions. */
|
||
|
||
typedef void (td_log_ftype)(const int on_off);
|
||
typedef td_err_e (td_ta_new_ftype)(const struct ps_prochandle *ph_p,
|
||
td_thragent_t **ta_pp);
|
||
typedef td_err_e (td_ta_delete_ftype)(td_thragent_t *ta_p);
|
||
typedef td_err_e (td_init_ftype)(void);
|
||
typedef td_err_e (td_ta_get_ph_ftype)(const td_thragent_t *ta_p,
|
||
struct ps_prochandle **ph_pp);
|
||
typedef td_err_e (td_ta_get_nthreads_ftype)(const td_thragent_t *ta_p,
|
||
int *nthread_p);
|
||
typedef td_err_e (td_ta_tsd_iter_ftype)(const td_thragent_t *ta_p,
|
||
td_key_iter_f *cb, void *cbdata_p);
|
||
typedef td_err_e (td_ta_thr_iter_ftype)(const td_thragent_t *ta_p,
|
||
td_thr_iter_f *cb, void *cbdata_p,
|
||
td_thr_state_e state, int ti_pri,
|
||
sigset_t *ti_sigmask_p,
|
||
unsigned ti_user_flags);
|
||
typedef td_err_e (td_thr_validate_ftype)(const td_thrhandle_t *th_p);
|
||
typedef td_err_e (td_thr_tsd_ftype)(const td_thrhandle_t * th_p,
|
||
const thread_key_t key, void **data_pp);
|
||
typedef td_err_e (td_thr_get_info_ftype)(const td_thrhandle_t *th_p,
|
||
td_thrinfo_t *ti_p);
|
||
typedef td_err_e (td_thr_getfpregs_ftype)(const td_thrhandle_t *th_p,
|
||
prfpregset_t *fpregset);
|
||
typedef td_err_e (td_thr_getxregsize_ftype)(const td_thrhandle_t *th_p,
|
||
int *xregsize);
|
||
typedef td_err_e (td_thr_getxregs_ftype)(const td_thrhandle_t *th_p,
|
||
const caddr_t xregset);
|
||
typedef td_err_e (td_thr_sigsetmask_ftype)(const td_thrhandle_t *th_p,
|
||
const sigset_t ti_sigmask);
|
||
typedef td_err_e (td_thr_setprio_ftype)(const td_thrhandle_t *th_p,
|
||
const int ti_pri);
|
||
typedef td_err_e (td_thr_setsigpending_ftype)(const td_thrhandle_t *th_p,
|
||
const uchar_t ti_pending_flag,
|
||
const sigset_t ti_pending);
|
||
typedef td_err_e (td_thr_setfpregs_ftype)(const td_thrhandle_t *th_p,
|
||
const prfpregset_t *fpregset);
|
||
typedef td_err_e (td_thr_setxregs_ftype)(const td_thrhandle_t *th_p,
|
||
const caddr_t xregset);
|
||
typedef td_err_e (td_ta_map_id2thr_ftype)(const td_thragent_t *ta_p,
|
||
thread_t tid,
|
||
td_thrhandle_t *th_p);
|
||
typedef td_err_e (td_ta_map_lwp2thr_ftype)(const td_thragent_t *ta_p,
|
||
lwpid_t lwpid,
|
||
td_thrhandle_t *th_p);
|
||
typedef td_err_e (td_thr_getgregs_ftype)(const td_thrhandle_t *th_p,
|
||
prgregset_t regset);
|
||
typedef td_err_e (td_thr_setgregs_ftype)(const td_thrhandle_t *th_p,
|
||
const prgregset_t regset);
|
||
|
||
/* Pointers to routines from libthread_db resolved by dlopen(). */
|
||
|
||
static td_log_ftype *p_td_log;
|
||
static td_ta_new_ftype *p_td_ta_new;
|
||
static td_ta_delete_ftype *p_td_ta_delete;
|
||
static td_init_ftype *p_td_init;
|
||
static td_ta_get_ph_ftype *p_td_ta_get_ph;
|
||
static td_ta_get_nthreads_ftype *p_td_ta_get_nthreads;
|
||
static td_ta_tsd_iter_ftype *p_td_ta_tsd_iter;
|
||
static td_ta_thr_iter_ftype *p_td_ta_thr_iter;
|
||
static td_thr_validate_ftype *p_td_thr_validate;
|
||
static td_thr_tsd_ftype *p_td_thr_tsd;
|
||
static td_thr_get_info_ftype *p_td_thr_get_info;
|
||
static td_thr_getfpregs_ftype *p_td_thr_getfpregs;
|
||
static td_thr_getxregsize_ftype *p_td_thr_getxregsize;
|
||
static td_thr_getxregs_ftype *p_td_thr_getxregs;
|
||
static td_thr_sigsetmask_ftype *p_td_thr_sigsetmask;
|
||
static td_thr_setprio_ftype *p_td_thr_setprio;
|
||
static td_thr_setsigpending_ftype *p_td_thr_setsigpending;
|
||
static td_thr_setfpregs_ftype *p_td_thr_setfpregs;
|
||
static td_thr_setxregs_ftype *p_td_thr_setxregs;
|
||
static td_ta_map_id2thr_ftype *p_td_ta_map_id2thr;
|
||
static td_ta_map_lwp2thr_ftype *p_td_ta_map_lwp2thr;
|
||
static td_thr_getgregs_ftype *p_td_thr_getgregs;
|
||
static td_thr_setgregs_ftype *p_td_thr_setgregs;
|
||
|
||
|
||
/* Return the libthread_db error string associated with ERRCODE. If
|
||
ERRCODE is unknown, return an appropriate message. */
|
||
|
||
static const char *
|
||
td_err_string (td_err_e errcode)
|
||
{
|
||
static struct string_map td_err_table[] =
|
||
{
|
||
{ TD_OK, "generic \"call succeeded\"" },
|
||
{ TD_ERR, "generic error." },
|
||
{ TD_NOTHR, "no thread can be found to satisfy query" },
|
||
{ TD_NOSV, "no synch. variable can be found to satisfy query" },
|
||
{ TD_NOLWP, "no lwp can be found to satisfy query" },
|
||
{ TD_BADPH, "invalid process handle" },
|
||
{ TD_BADTH, "invalid thread handle" },
|
||
{ TD_BADSH, "invalid synchronization handle" },
|
||
{ TD_BADTA, "invalid thread agent" },
|
||
{ TD_BADKEY, "invalid key" },
|
||
{ TD_NOMSG, "td_thr_event_getmsg() called when there was no message" },
|
||
{ TD_NOFPREGS, "FPU register set not available for given thread" },
|
||
{ TD_NOLIBTHREAD, "application not linked with libthread" },
|
||
{ TD_NOEVENT, "requested event is not supported" },
|
||
{ TD_NOCAPAB, "capability not available" },
|
||
{ TD_DBERR, "Debugger service failed" },
|
||
{ TD_NOAPLIC, "Operation not applicable to" },
|
||
{ TD_NOTSD, "No thread specific data for this thread" },
|
||
{ TD_MALLOC, "Malloc failed" },
|
||
{ TD_PARTIALREG, "Only part of register set was written/read" },
|
||
{ TD_NOXREGS, "X register set not available for given thread" }
|
||
};
|
||
const int td_err_size = sizeof td_err_table / sizeof (struct string_map);
|
||
int i;
|
||
static char buf[50];
|
||
|
||
for (i = 0; i < td_err_size; i++)
|
||
if (td_err_table[i].num == errcode)
|
||
return td_err_table[i].str;
|
||
|
||
xsnprintf (buf, sizeof (buf), "Unknown libthread_db error code: %d",
|
||
errcode);
|
||
|
||
return buf;
|
||
}
|
||
|
||
/* Return the libthread_db state string associated with STATECODE.
|
||
If STATECODE is unknown, return an appropriate message. */
|
||
|
||
static const char *
|
||
td_state_string (td_thr_state_e statecode)
|
||
{
|
||
static struct string_map td_thr_state_table[] =
|
||
{
|
||
{ TD_THR_ANY_STATE, "any state" },
|
||
{ TD_THR_UNKNOWN, "unknown" },
|
||
{ TD_THR_STOPPED, "stopped" },
|
||
{ TD_THR_RUN, "run" },
|
||
{ TD_THR_ACTIVE, "active" },
|
||
{ TD_THR_ZOMBIE, "zombie" },
|
||
{ TD_THR_SLEEP, "sleep" },
|
||
{ TD_THR_STOPPED_ASLEEP, "stopped asleep" }
|
||
};
|
||
const int td_thr_state_table_size =
|
||
sizeof td_thr_state_table / sizeof (struct string_map);
|
||
int i;
|
||
static char buf[50];
|
||
|
||
for (i = 0; i < td_thr_state_table_size; i++)
|
||
if (td_thr_state_table[i].num == statecode)
|
||
return td_thr_state_table[i].str;
|
||
|
||
xsnprintf (buf, sizeof (buf), "Unknown libthread_db state code: %d",
|
||
statecode);
|
||
|
||
return buf;
|
||
}
|
||
|
||
|
||
/* Convert a POSIX or Solaris thread ID into a LWP ID. If THREAD_ID
|
||
doesn't exist, that's an error. If it's an inactive thread, return
|
||
DEFAULT_LWP.
|
||
|
||
NOTE: This function probably shouldn't call error(). */
|
||
|
||
static ptid_t
|
||
thread_to_lwp (ptid_t thread_id, int default_lwp)
|
||
{
|
||
td_thrinfo_t ti;
|
||
td_thrhandle_t th;
|
||
td_err_e val;
|
||
|
||
if (thread_id.lwp_p ())
|
||
return thread_id; /* It's already an LWP ID. */
|
||
|
||
/* It's a thread. Convert to LWP. */
|
||
|
||
val = p_td_ta_map_id2thr (main_ta, thread_id.tid (), &th);
|
||
if (val == TD_NOTHR)
|
||
return ptid_t (-1); /* Thread must have terminated. */
|
||
else if (val != TD_OK)
|
||
error (_("thread_to_lwp: td_ta_map_id2thr %s"), td_err_string (val));
|
||
|
||
val = p_td_thr_get_info (&th, &ti);
|
||
if (val == TD_NOTHR)
|
||
return ptid_t (-1); /* Thread must have terminated. */
|
||
else if (val != TD_OK)
|
||
error (_("thread_to_lwp: td_thr_get_info: %s"), td_err_string (val));
|
||
|
||
if (ti.ti_state != TD_THR_ACTIVE)
|
||
{
|
||
if (default_lwp != -1)
|
||
return ptid_t (default_lwp);
|
||
error (_("thread_to_lwp: thread state not active: %s"),
|
||
td_state_string (ti.ti_state));
|
||
}
|
||
|
||
return ptid_t (thread_id.pid (), ti.ti_lid, 0);
|
||
}
|
||
|
||
/* Convert an LWP ID into a POSIX or Solaris thread ID. If LWP_ID
|
||
doesn't exists, that's an error.
|
||
|
||
NOTE: This function probably shouldn't call error(). */
|
||
|
||
static ptid_t
|
||
lwp_to_thread (ptid_t lwp)
|
||
{
|
||
td_thrinfo_t ti;
|
||
td_thrhandle_t th;
|
||
td_err_e val;
|
||
|
||
if (lwp.tid_p ())
|
||
return lwp; /* It's already a thread ID. */
|
||
|
||
/* It's an LWP. Convert it to a thread ID. */
|
||
|
||
if (!target_thread_alive (lwp))
|
||
return ptid_t (-1); /* Must be a defunct LPW. */
|
||
|
||
val = p_td_ta_map_lwp2thr (main_ta, lwp.lwp (), &th);
|
||
if (val == TD_NOTHR)
|
||
return ptid_t (-1); /* Thread must have terminated. */
|
||
else if (val != TD_OK)
|
||
error (_("lwp_to_thread: td_ta_map_lwp2thr: %s."), td_err_string (val));
|
||
|
||
val = p_td_thr_validate (&th);
|
||
if (val == TD_NOTHR)
|
||
return lwp; /* Unknown to libthread; just return LPW, */
|
||
else if (val != TD_OK)
|
||
error (_("lwp_to_thread: td_thr_validate: %s."), td_err_string (val));
|
||
|
||
val = p_td_thr_get_info (&th, &ti);
|
||
if (val == TD_NOTHR)
|
||
return ptid_t (-1); /* Thread must have terminated. */
|
||
else if (val != TD_OK)
|
||
error (_("lwp_to_thread: td_thr_get_info: %s."), td_err_string (val));
|
||
|
||
return ptid_t (lwp.pid (), 0 , ti.ti_tid);
|
||
}
|
||
|
||
|
||
/* Most target vector functions from here on actually just pass
|
||
through to the layer beneath, as they don't need to do anything
|
||
specific for threads. */
|
||
|
||
/* Take a program previously attached to and detaches it. The program
|
||
resumes execution and will no longer stop on signals, etc. We'd
|
||
better not have left any breakpoints in the program or it'll die
|
||
when it hits one. For this to work, it may be necessary for the
|
||
process to have been previously attached. It *might* work if the
|
||
program was started via the normal ptrace (PTRACE_TRACEME). */
|
||
|
||
void
|
||
sol_thread_target::detach (inferior *inf, int from_tty)
|
||
{
|
||
target_ops *beneath = this->beneath ();
|
||
|
||
sol_thread_active = 0;
|
||
inferior_ptid = ptid_t (main_ph.ptid.pid ());
|
||
unpush_target (this);
|
||
beneath->detach (inf, from_tty);
|
||
}
|
||
|
||
/* Resume execution of process PTID. If STEP is nonzero, then just
|
||
single step it. If SIGNAL is nonzero, restart it with that signal
|
||
activated. We may have to convert PTID from a thread ID to an LWP
|
||
ID for procfs. */
|
||
|
||
void
|
||
sol_thread_target::resume (ptid_t ptid, int step, enum gdb_signal signo)
|
||
{
|
||
scoped_restore save_inferior_ptid = make_scoped_restore (&inferior_ptid);
|
||
|
||
inferior_ptid = thread_to_lwp (inferior_ptid, main_ph.ptid.pid ());
|
||
if (inferior_ptid.pid () == -1)
|
||
inferior_ptid = procfs_first_available ();
|
||
|
||
if (ptid.pid () != -1)
|
||
{
|
||
ptid_t save_ptid = ptid;
|
||
|
||
ptid = thread_to_lwp (ptid, -2);
|
||
if (ptid.pid () == -2) /* Inactive thread. */
|
||
error (_("This version of Solaris can't start inactive threads."));
|
||
if (info_verbose && ptid.pid () == -1)
|
||
warning (_("Specified thread %ld seems to have terminated"),
|
||
save_ptid.tid ());
|
||
}
|
||
|
||
beneath ()->resume (ptid, step, signo);
|
||
}
|
||
|
||
/* Wait for any threads to stop. We may have to convert PTID from a
|
||
thread ID to an LWP ID, and vice versa on the way out. */
|
||
|
||
ptid_t
|
||
sol_thread_target::wait (ptid_t ptid, struct target_waitstatus *ourstatus,
|
||
int options)
|
||
{
|
||
ptid_t rtnval;
|
||
ptid_t save_ptid;
|
||
|
||
save_ptid = inferior_ptid;
|
||
scoped_restore save_inferior_ptid = make_scoped_restore (&inferior_ptid);
|
||
|
||
inferior_ptid = thread_to_lwp (inferior_ptid, main_ph.ptid.pid ());
|
||
if (inferior_ptid.pid () == -1)
|
||
inferior_ptid = procfs_first_available ();
|
||
|
||
if (ptid.pid () != -1)
|
||
{
|
||
ptid_t ptid_for_warning = ptid;
|
||
|
||
ptid = thread_to_lwp (ptid, -2);
|
||
if (ptid.pid () == -2) /* Inactive thread. */
|
||
error (_("This version of Solaris can't start inactive threads."));
|
||
if (info_verbose && ptid.pid () == -1)
|
||
warning (_("Specified thread %ld seems to have terminated"),
|
||
ptid_for_warning.tid ());
|
||
}
|
||
|
||
rtnval = beneath ()->wait (ptid, ourstatus, options);
|
||
|
||
if (ourstatus->kind != TARGET_WAITKIND_EXITED)
|
||
{
|
||
/* Map the LWP of interest back to the appropriate thread ID. */
|
||
rtnval = lwp_to_thread (rtnval);
|
||
if (rtnval.pid () == -1)
|
||
rtnval = save_ptid;
|
||
|
||
/* See if we have a new thread. */
|
||
if (rtnval.tid_p () && rtnval != save_ptid)
|
||
{
|
||
thread_info *thr = find_thread_ptid (current_inferior (), rtnval);
|
||
if (thr == NULL || thr->state == THREAD_EXITED)
|
||
{
|
||
process_stratum_target *proc_target
|
||
= current_inferior ()->process_target ();
|
||
add_thread (proc_target, rtnval);
|
||
}
|
||
}
|
||
}
|
||
|
||
/* During process initialization, we may get here without the thread
|
||
package being initialized, since that can only happen after we've
|
||
found the shared libs. */
|
||
|
||
return rtnval;
|
||
}
|
||
|
||
void
|
||
sol_thread_target::fetch_registers (struct regcache *regcache, int regnum)
|
||
{
|
||
thread_t thread;
|
||
td_thrhandle_t thandle;
|
||
td_err_e val;
|
||
prgregset_t gregset;
|
||
prfpregset_t fpregset;
|
||
gdb_gregset_t *gregset_p = &gregset;
|
||
gdb_fpregset_t *fpregset_p = &fpregset;
|
||
ptid_t ptid = regcache->ptid ();
|
||
|
||
if (!ptid.tid_p ())
|
||
{
|
||
/* It's an LWP; pass the request on to the layer beneath. */
|
||
beneath ()->fetch_registers (regcache, regnum);
|
||
return;
|
||
}
|
||
|
||
/* Solaris thread: convert PTID into a td_thrhandle_t. */
|
||
thread = ptid.tid ();
|
||
if (thread == 0)
|
||
error (_("sol_thread_fetch_registers: thread == 0"));
|
||
|
||
val = p_td_ta_map_id2thr (main_ta, thread, &thandle);
|
||
if (val != TD_OK)
|
||
error (_("sol_thread_fetch_registers: td_ta_map_id2thr: %s"),
|
||
td_err_string (val));
|
||
|
||
/* Get the general-purpose registers. */
|
||
|
||
val = p_td_thr_getgregs (&thandle, gregset);
|
||
if (val != TD_OK && val != TD_PARTIALREG)
|
||
error (_("sol_thread_fetch_registers: td_thr_getgregs %s"),
|
||
td_err_string (val));
|
||
|
||
/* For SPARC, TD_PARTIALREG means that only %i0...%i7, %l0..%l7, %pc
|
||
and %sp are saved (by a thread context switch). */
|
||
|
||
/* And, now the floating-point registers. */
|
||
|
||
val = p_td_thr_getfpregs (&thandle, &fpregset);
|
||
if (val != TD_OK && val != TD_NOFPREGS)
|
||
error (_("sol_thread_fetch_registers: td_thr_getfpregs %s"),
|
||
td_err_string (val));
|
||
|
||
/* Note that we must call supply_gregset and supply_fpregset *after*
|
||
calling the td routines because the td routines call ps_lget*
|
||
which affect the values stored in the registers array. */
|
||
|
||
supply_gregset (regcache, (const gdb_gregset_t *) gregset_p);
|
||
supply_fpregset (regcache, (const gdb_fpregset_t *) fpregset_p);
|
||
}
|
||
|
||
void
|
||
sol_thread_target::store_registers (struct regcache *regcache, int regnum)
|
||
{
|
||
thread_t thread;
|
||
td_thrhandle_t thandle;
|
||
td_err_e val;
|
||
prgregset_t gregset;
|
||
prfpregset_t fpregset;
|
||
ptid_t ptid = regcache->ptid ();
|
||
|
||
if (!ptid.tid_p ())
|
||
{
|
||
/* It's an LWP; pass the request on to the layer beneath. */
|
||
beneath ()->store_registers (regcache, regnum);
|
||
return;
|
||
}
|
||
|
||
/* Solaris thread: convert PTID into a td_thrhandle_t. */
|
||
thread = ptid.tid ();
|
||
|
||
val = p_td_ta_map_id2thr (main_ta, thread, &thandle);
|
||
if (val != TD_OK)
|
||
error (_("sol_thread_store_registers: td_ta_map_id2thr %s"),
|
||
td_err_string (val));
|
||
|
||
if (regnum != -1)
|
||
{
|
||
val = p_td_thr_getgregs (&thandle, gregset);
|
||
if (val != TD_OK)
|
||
error (_("sol_thread_store_registers: td_thr_getgregs %s"),
|
||
td_err_string (val));
|
||
val = p_td_thr_getfpregs (&thandle, &fpregset);
|
||
if (val != TD_OK)
|
||
error (_("sol_thread_store_registers: td_thr_getfpregs %s"),
|
||
td_err_string (val));
|
||
}
|
||
|
||
fill_gregset (regcache, (gdb_gregset_t *) &gregset, regnum);
|
||
fill_fpregset (regcache, (gdb_fpregset_t *) &fpregset, regnum);
|
||
|
||
val = p_td_thr_setgregs (&thandle, gregset);
|
||
if (val != TD_OK)
|
||
error (_("sol_thread_store_registers: td_thr_setgregs %s"),
|
||
td_err_string (val));
|
||
val = p_td_thr_setfpregs (&thandle, &fpregset);
|
||
if (val != TD_OK)
|
||
error (_("sol_thread_store_registers: td_thr_setfpregs %s"),
|
||
td_err_string (val));
|
||
}
|
||
|
||
/* Perform partial transfers on OBJECT. See target_read_partial and
|
||
target_write_partial for details of each variant. One, and only
|
||
one, of readbuf or writebuf must be non-NULL. */
|
||
|
||
enum target_xfer_status
|
||
sol_thread_target::xfer_partial (enum target_object object,
|
||
const char *annex, gdb_byte *readbuf,
|
||
const gdb_byte *writebuf,
|
||
ULONGEST offset, ULONGEST len,
|
||
ULONGEST *xfered_len)
|
||
{
|
||
scoped_restore save_inferior_ptid = make_scoped_restore (&inferior_ptid);
|
||
|
||
if (inferior_ptid.tid_p () || !target_thread_alive (inferior_ptid))
|
||
{
|
||
/* It's either a thread or an LWP that isn't alive. Any live
|
||
LWP will do so use the first available.
|
||
|
||
NOTE: We don't need to call switch_to_thread; we're just
|
||
reading memory. */
|
||
inferior_ptid = procfs_first_available ();
|
||
}
|
||
|
||
return beneath ()->xfer_partial (object, annex, readbuf,
|
||
writebuf, offset, len, xfered_len);
|
||
}
|
||
|
||
static void
|
||
check_for_thread_db (void)
|
||
{
|
||
td_err_e err;
|
||
ptid_t ptid;
|
||
|
||
/* Don't attempt to use thread_db for remote targets. */
|
||
if (!(target_can_run () || core_bfd))
|
||
return;
|
||
|
||
/* Do nothing if we couldn't load libthread_db.so.1. */
|
||
if (p_td_ta_new == NULL)
|
||
return;
|
||
|
||
if (sol_thread_active)
|
||
/* Nothing to do. The thread library was already detected and the
|
||
target vector was already activated. */
|
||
return;
|
||
|
||
/* Now, initialize libthread_db. This needs to be done after the
|
||
shared libraries are located because it needs information from
|
||
the user's thread library. */
|
||
|
||
err = p_td_init ();
|
||
if (err != TD_OK)
|
||
{
|
||
warning (_("sol_thread_new_objfile: td_init: %s"), td_err_string (err));
|
||
return;
|
||
}
|
||
|
||
/* Now attempt to open a connection to the thread library. */
|
||
err = p_td_ta_new (&main_ph, &main_ta);
|
||
switch (err)
|
||
{
|
||
case TD_NOLIBTHREAD:
|
||
/* No thread library was detected. */
|
||
break;
|
||
|
||
case TD_OK:
|
||
printf_unfiltered (_("[Thread debugging using libthread_db enabled]\n"));
|
||
|
||
/* The thread library was detected. Activate the sol_thread target. */
|
||
push_target (&sol_thread_ops);
|
||
sol_thread_active = 1;
|
||
|
||
main_ph.ptid = inferior_ptid; /* Save for xfer_memory. */
|
||
ptid = lwp_to_thread (inferior_ptid);
|
||
if (ptid.pid () != -1)
|
||
inferior_ptid = ptid;
|
||
|
||
target_update_thread_list ();
|
||
break;
|
||
|
||
default:
|
||
warning (_("Cannot initialize thread debugging library: %s"),
|
||
td_err_string (err));
|
||
break;
|
||
}
|
||
}
|
||
|
||
/* This routine is called whenever a new symbol table is read in, or
|
||
when all symbol tables are removed. libthread_db can only be
|
||
initialized when it finds the right variables in libthread.so.
|
||
Since it's a shared library, those variables don't show up until
|
||
the library gets mapped and the symbol table is read in. */
|
||
|
||
static void
|
||
sol_thread_new_objfile (struct objfile *objfile)
|
||
{
|
||
if (objfile != NULL)
|
||
check_for_thread_db ();
|
||
}
|
||
|
||
/* Clean up after the inferior dies. */
|
||
|
||
void
|
||
sol_thread_target::mourn_inferior ()
|
||
{
|
||
target_ops *beneath = this->beneath ();
|
||
|
||
sol_thread_active = 0;
|
||
|
||
unpush_target (this);
|
||
|
||
beneath->mourn_inferior ();
|
||
}
|
||
|
||
/* Return true if PTID is still active in the inferior. */
|
||
|
||
bool
|
||
sol_thread_target::thread_alive (ptid_t ptid)
|
||
{
|
||
if (ptid.tid_p ())
|
||
{
|
||
/* It's a (user-level) thread. */
|
||
td_err_e val;
|
||
td_thrhandle_t th;
|
||
int pid;
|
||
|
||
pid = ptid.tid ();
|
||
val = p_td_ta_map_id2thr (main_ta, pid, &th);
|
||
if (val != TD_OK)
|
||
return false; /* Thread not found. */
|
||
val = p_td_thr_validate (&th);
|
||
if (val != TD_OK)
|
||
return false; /* Thread not valid. */
|
||
return true; /* Known thread. */
|
||
}
|
||
else
|
||
{
|
||
/* It's an LPW; pass the request on to the layer below. */
|
||
return beneath ()->thread_alive (ptid);
|
||
}
|
||
}
|
||
|
||
|
||
/* These routines implement the lower half of the thread_db interface,
|
||
i.e. the ps_* routines. */
|
||
|
||
/* The next four routines are called by libthread_db to tell us to
|
||
stop and stop a particular process or lwp. Since GDB ensures that
|
||
these are all stopped by the time we call anything in thread_db,
|
||
these routines need to do nothing. */
|
||
|
||
/* Process stop. */
|
||
|
||
ps_err_e
|
||
ps_pstop (struct ps_prochandle *ph)
|
||
{
|
||
return PS_OK;
|
||
}
|
||
|
||
/* Process continue. */
|
||
|
||
ps_err_e
|
||
ps_pcontinue (struct ps_prochandle *ph)
|
||
{
|
||
return PS_OK;
|
||
}
|
||
|
||
/* LWP stop. */
|
||
|
||
ps_err_e
|
||
ps_lstop (struct ps_prochandle *ph, lwpid_t lwpid)
|
||
{
|
||
return PS_OK;
|
||
}
|
||
|
||
/* LWP continue. */
|
||
|
||
ps_err_e
|
||
ps_lcontinue (struct ps_prochandle *ph, lwpid_t lwpid)
|
||
{
|
||
return PS_OK;
|
||
}
|
||
|
||
/* Looks up the symbol LD_SYMBOL_NAME in the debugger's symbol table. */
|
||
|
||
ps_err_e
|
||
ps_pglobal_lookup (struct ps_prochandle *ph, const char *ld_object_name,
|
||
const char *ld_symbol_name, psaddr_t *ld_symbol_addr)
|
||
{
|
||
struct bound_minimal_symbol ms;
|
||
|
||
ms = lookup_minimal_symbol (ld_symbol_name, NULL, NULL);
|
||
if (!ms.minsym)
|
||
return PS_NOSYM;
|
||
|
||
*ld_symbol_addr = BMSYMBOL_VALUE_ADDRESS (ms);
|
||
return PS_OK;
|
||
}
|
||
|
||
/* Common routine for reading and writing memory. */
|
||
|
||
static ps_err_e
|
||
rw_common (int dowrite, const struct ps_prochandle *ph, psaddr_t addr,
|
||
gdb_byte *buf, int size)
|
||
{
|
||
int ret;
|
||
|
||
scoped_restore save_inferior_ptid = make_scoped_restore (&inferior_ptid);
|
||
|
||
if (inferior_ptid.tid_p () || !target_thread_alive (inferior_ptid))
|
||
{
|
||
/* It's either a thread or an LWP that isn't alive. Any live
|
||
LWP will do so use the first available.
|
||
|
||
NOTE: We don't need to call switch_to_thread; we're just
|
||
reading memory. */
|
||
inferior_ptid = procfs_first_available ();
|
||
}
|
||
|
||
#if defined (__sparcv9)
|
||
/* For Sparc64 cross Sparc32, make sure the address has not been
|
||
accidentally sign-extended (or whatever) to beyond 32 bits. */
|
||
if (bfd_get_arch_size (exec_bfd) == 32)
|
||
addr &= 0xffffffff;
|
||
#endif
|
||
|
||
if (dowrite)
|
||
ret = target_write_memory (addr, (gdb_byte *) buf, size);
|
||
else
|
||
ret = target_read_memory (addr, (gdb_byte *) buf, size);
|
||
|
||
return (ret == 0 ? PS_OK : PS_ERR);
|
||
}
|
||
|
||
/* Copies SIZE bytes from target process .data segment to debugger memory. */
|
||
|
||
ps_err_e
|
||
ps_pdread (struct ps_prochandle *ph, psaddr_t addr, void *buf, size_t size)
|
||
{
|
||
return rw_common (0, ph, addr, (gdb_byte *) buf, size);
|
||
}
|
||
|
||
/* Copies SIZE bytes from debugger memory .data segment to target process. */
|
||
|
||
ps_err_e
|
||
ps_pdwrite (struct ps_prochandle *ph, psaddr_t addr,
|
||
const void *buf, size_t size)
|
||
{
|
||
return rw_common (1, ph, addr, (gdb_byte *) buf, size);
|
||
}
|
||
|
||
/* Copies SIZE bytes from target process .text segment to debugger memory. */
|
||
|
||
ps_err_e
|
||
ps_ptread (struct ps_prochandle *ph, psaddr_t addr, void *buf, size_t size)
|
||
{
|
||
return rw_common (0, ph, addr, (gdb_byte *) buf, size);
|
||
}
|
||
|
||
/* Copies SIZE bytes from debugger memory .text segment to target process. */
|
||
|
||
ps_err_e
|
||
ps_ptwrite (struct ps_prochandle *ph, psaddr_t addr,
|
||
const void *buf, size_t size)
|
||
{
|
||
return rw_common (1, ph, addr, (gdb_byte *) buf, size);
|
||
}
|
||
|
||
/* Get general-purpose registers for LWP. */
|
||
|
||
ps_err_e
|
||
ps_lgetregs (struct ps_prochandle *ph, lwpid_t lwpid, prgregset_t gregset)
|
||
{
|
||
ptid_t ptid = ptid_t (inferior_ptid.pid (), lwpid, 0);
|
||
struct regcache *regcache
|
||
= get_thread_arch_regcache (current_inferior ()->process_target (),
|
||
ptid, target_gdbarch ());
|
||
|
||
target_fetch_registers (regcache, -1);
|
||
fill_gregset (regcache, (gdb_gregset_t *) gregset, -1);
|
||
|
||
return PS_OK;
|
||
}
|
||
|
||
/* Set general-purpose registers for LWP. */
|
||
|
||
ps_err_e
|
||
ps_lsetregs (struct ps_prochandle *ph, lwpid_t lwpid,
|
||
const prgregset_t gregset)
|
||
{
|
||
ptid_t ptid = ptid_t (inferior_ptid.pid (), lwpid, 0);
|
||
struct regcache *regcache
|
||
= get_thread_arch_regcache (current_inferior ()->process_target (),
|
||
ptid, target_gdbarch ());
|
||
|
||
supply_gregset (regcache, (const gdb_gregset_t *) gregset);
|
||
target_store_registers (regcache, -1);
|
||
|
||
return PS_OK;
|
||
}
|
||
|
||
/* Log a message (sends to gdb_stderr). */
|
||
|
||
void
|
||
ps_plog (const char *fmt, ...)
|
||
{
|
||
va_list args;
|
||
|
||
va_start (args, fmt);
|
||
|
||
vfprintf_filtered (gdb_stderr, fmt, args);
|
||
}
|
||
|
||
/* Get size of extra register set. Currently a noop. */
|
||
|
||
ps_err_e
|
||
ps_lgetxregsize (struct ps_prochandle *ph, lwpid_t lwpid, int *xregsize)
|
||
{
|
||
return PS_OK;
|
||
}
|
||
|
||
/* Get extra register set. Currently a noop. */
|
||
|
||
ps_err_e
|
||
ps_lgetxregs (struct ps_prochandle *ph, lwpid_t lwpid, caddr_t xregset)
|
||
{
|
||
return PS_OK;
|
||
}
|
||
|
||
/* Set extra register set. Currently a noop. */
|
||
|
||
ps_err_e
|
||
ps_lsetxregs (struct ps_prochandle *ph, lwpid_t lwpid, caddr_t xregset)
|
||
{
|
||
return PS_OK;
|
||
}
|
||
|
||
/* Get floating-point registers for LWP. */
|
||
|
||
ps_err_e
|
||
ps_lgetfpregs (struct ps_prochandle *ph, lwpid_t lwpid,
|
||
prfpregset_t *fpregset)
|
||
{
|
||
ptid_t ptid = ptid_t (inferior_ptid.pid (), lwpid, 0);
|
||
struct regcache *regcache
|
||
= get_thread_arch_regcache (current_inferior ()->process_target (),
|
||
ptid, target_gdbarch ());
|
||
|
||
target_fetch_registers (regcache, -1);
|
||
fill_fpregset (regcache, (gdb_fpregset_t *) fpregset, -1);
|
||
|
||
return PS_OK;
|
||
}
|
||
|
||
/* Set floating-point regs for LWP. */
|
||
|
||
ps_err_e
|
||
ps_lsetfpregs (struct ps_prochandle *ph, lwpid_t lwpid,
|
||
const prfpregset_t * fpregset)
|
||
{
|
||
ptid_t ptid = ptid_t (inferior_ptid.pid (), lwpid, 0);
|
||
struct regcache *regcache
|
||
= get_thread_arch_regcache (current_inferior ()->process_target (),
|
||
ptid, target_gdbarch ());
|
||
|
||
supply_fpregset (regcache, (const gdb_fpregset_t *) fpregset);
|
||
target_store_registers (regcache, -1);
|
||
|
||
return PS_OK;
|
||
}
|
||
|
||
/* Identify process as 32-bit or 64-bit. At the moment we're using
|
||
BFD to do this. There might be a more Solaris-specific
|
||
(e.g. procfs) method, but this ought to work. */
|
||
|
||
ps_err_e
|
||
ps_pdmodel (struct ps_prochandle *ph, int *data_model)
|
||
{
|
||
if (exec_bfd == 0)
|
||
*data_model = PR_MODEL_UNKNOWN;
|
||
else if (bfd_get_arch_size (exec_bfd) == 32)
|
||
*data_model = PR_MODEL_ILP32;
|
||
else
|
||
*data_model = PR_MODEL_LP64;
|
||
|
||
return PS_OK;
|
||
}
|
||
|
||
#if (defined(__i386__) || defined(__x86_64__)) && defined (sun)
|
||
|
||
/* Reads the local descriptor table of a LWP.
|
||
|
||
This function is necessary on x86-solaris only. Without it, the loading
|
||
of libthread_db would fail because of ps_lgetLDT being undefined. */
|
||
|
||
ps_err_e
|
||
ps_lgetLDT (struct ps_prochandle *ph, lwpid_t lwpid, struct ssd *pldt) /* ARI: editCase function */
|
||
{
|
||
/* NOTE: only used on Solaris, therefore OK to refer to procfs.c. */
|
||
struct ssd *ret;
|
||
|
||
/* FIXME: can't I get the process ID from the prochandle or
|
||
something? */
|
||
|
||
if (inferior_ptid.pid () <= 0 || lwpid <= 0)
|
||
return PS_BADLID;
|
||
|
||
ret = procfs_find_LDT_entry (ptid_t (inferior_ptid.pid (),
|
||
lwpid, 0));
|
||
if (ret)
|
||
{
|
||
memcpy (pldt, ret, sizeof (struct ssd));
|
||
return PS_OK;
|
||
}
|
||
else
|
||
/* LDT not found. */
|
||
return PS_ERR;
|
||
}
|
||
#endif
|
||
|
||
|
||
/* Convert PTID to printable form. */
|
||
|
||
std::string
|
||
sol_thread_target::pid_to_str (ptid_t ptid)
|
||
{
|
||
if (ptid.tid_p ())
|
||
{
|
||
ptid_t lwp;
|
||
|
||
lwp = thread_to_lwp (ptid, -2);
|
||
|
||
if (lwp.pid () == -1)
|
||
return string_printf ("Thread %ld (defunct)",
|
||
ptid.tid ());
|
||
else if (lwp.pid () != -2)
|
||
return string_printf ("Thread %ld (LWP %ld)",
|
||
ptid.tid (), lwp.lwp ());
|
||
else
|
||
return string_printf ("Thread %ld ",
|
||
ptid.tid ());
|
||
}
|
||
else if (ptid.lwp () != 0)
|
||
return string_printf ("LWP %ld ", ptid.lwp ());
|
||
else
|
||
return string_printf ("process %d ", ptid.pid ());
|
||
}
|
||
|
||
|
||
/* Worker bee for update_thread_list. Callback function that gets
|
||
called once per user-level thread (i.e. not for LWP's). */
|
||
|
||
static int
|
||
sol_update_thread_list_callback (const td_thrhandle_t *th, void *ignored)
|
||
{
|
||
td_err_e retval;
|
||
td_thrinfo_t ti;
|
||
|
||
retval = p_td_thr_get_info (th, &ti);
|
||
if (retval != TD_OK)
|
||
return -1;
|
||
|
||
ptid_t ptid = ptid_t (inferior_ptid.pid (), 0, ti.ti_tid);
|
||
thread_info *thr = find_thread_ptid (current_inferior (), ptid);
|
||
if (thr == NULL || thr->state == THREAD_EXITED)
|
||
{
|
||
process_stratum_target *proc_target
|
||
= current_inferior ()->process_target ();
|
||
add_thread (proc_target, ptid);
|
||
}
|
||
|
||
return 0;
|
||
}
|
||
|
||
void
|
||
sol_thread_target::update_thread_list ()
|
||
{
|
||
/* Delete dead threads. */
|
||
prune_threads ();
|
||
|
||
/* Find any new LWP's. */
|
||
beneath ()->update_thread_list ();
|
||
|
||
/* Then find any new user-level threads. */
|
||
p_td_ta_thr_iter (main_ta, sol_update_thread_list_callback, (void *) 0,
|
||
TD_THR_ANY_STATE, TD_THR_LOWEST_PRIORITY,
|
||
TD_SIGNO_MASK, TD_THR_ANY_USER_FLAGS);
|
||
}
|
||
|
||
/* Worker bee for the "info sol-thread" command. This is a callback
|
||
function that gets called once for each Solaris user-level thread
|
||
(i.e. not for LWPs) in the inferior. Print anything interesting
|
||
that we can think of. */
|
||
|
||
static int
|
||
info_cb (const td_thrhandle_t *th, void *s)
|
||
{
|
||
td_err_e ret;
|
||
td_thrinfo_t ti;
|
||
|
||
ret = p_td_thr_get_info (th, &ti);
|
||
if (ret == TD_OK)
|
||
{
|
||
printf_filtered ("%s thread #%d, lwp %d, ",
|
||
ti.ti_type == TD_THR_SYSTEM ? "system" : "user ",
|
||
ti.ti_tid, ti.ti_lid);
|
||
switch (ti.ti_state)
|
||
{
|
||
default:
|
||
case TD_THR_UNKNOWN:
|
||
printf_filtered ("<unknown state>");
|
||
break;
|
||
case TD_THR_STOPPED:
|
||
printf_filtered ("(stopped)");
|
||
break;
|
||
case TD_THR_RUN:
|
||
printf_filtered ("(run) ");
|
||
break;
|
||
case TD_THR_ACTIVE:
|
||
printf_filtered ("(active) ");
|
||
break;
|
||
case TD_THR_ZOMBIE:
|
||
printf_filtered ("(zombie) ");
|
||
break;
|
||
case TD_THR_SLEEP:
|
||
printf_filtered ("(asleep) ");
|
||
break;
|
||
case TD_THR_STOPPED_ASLEEP:
|
||
printf_filtered ("(stopped asleep)");
|
||
break;
|
||
}
|
||
/* Print thr_create start function. */
|
||
if (ti.ti_startfunc != 0)
|
||
{
|
||
const struct bound_minimal_symbol msym
|
||
= lookup_minimal_symbol_by_pc (ti.ti_startfunc);
|
||
|
||
printf_filtered (" startfunc=%s",
|
||
msym.minsym
|
||
? msym.minsym->print_name ()
|
||
: paddress (target_gdbarch (), ti.ti_startfunc));
|
||
}
|
||
|
||
/* If thread is asleep, print function that went to sleep. */
|
||
if (ti.ti_state == TD_THR_SLEEP)
|
||
{
|
||
const struct bound_minimal_symbol msym
|
||
= lookup_minimal_symbol_by_pc (ti.ti_pc);
|
||
|
||
printf_filtered (" sleepfunc=%s",
|
||
msym.minsym
|
||
? msym.minsym->print_name ()
|
||
: paddress (target_gdbarch (), ti.ti_pc));
|
||
}
|
||
|
||
printf_filtered ("\n");
|
||
}
|
||
else
|
||
warning (_("info sol-thread: failed to get info for thread."));
|
||
|
||
return 0;
|
||
}
|
||
|
||
/* List some state about each Solaris user-level thread in the
|
||
inferior. */
|
||
|
||
static void
|
||
info_solthreads (const char *args, int from_tty)
|
||
{
|
||
p_td_ta_thr_iter (main_ta, info_cb, (void *) args,
|
||
TD_THR_ANY_STATE, TD_THR_LOWEST_PRIORITY,
|
||
TD_SIGNO_MASK, TD_THR_ANY_USER_FLAGS);
|
||
}
|
||
|
||
/* Callback routine used to find a thread based on the TID part of
|
||
its PTID. */
|
||
|
||
static int
|
||
thread_db_find_thread_from_tid (struct thread_info *thread, void *data)
|
||
{
|
||
long *tid = (long *) data;
|
||
|
||
if (thread->ptid.tid () == *tid)
|
||
return 1;
|
||
|
||
return 0;
|
||
}
|
||
|
||
ptid_t
|
||
sol_thread_target::get_ada_task_ptid (long lwp, long thread)
|
||
{
|
||
struct thread_info *thread_info =
|
||
iterate_over_threads (thread_db_find_thread_from_tid, &thread);
|
||
|
||
if (thread_info == NULL)
|
||
{
|
||
/* The list of threads is probably not up to date. Find any
|
||
thread that is missing from the list, and try again. */
|
||
update_thread_list ();
|
||
thread_info = iterate_over_threads (thread_db_find_thread_from_tid,
|
||
&thread);
|
||
}
|
||
|
||
gdb_assert (thread_info != NULL);
|
||
|
||
return (thread_info->ptid);
|
||
}
|
||
|
||
void
|
||
_initialize_sol_thread (void)
|
||
{
|
||
void *dlhandle;
|
||
|
||
dlhandle = dlopen ("libthread_db.so.1", RTLD_NOW);
|
||
if (!dlhandle)
|
||
goto die;
|
||
|
||
#define resolve(X) \
|
||
if (!(p_##X = (X ## _ftype *) dlsym (dlhandle, #X))) \
|
||
goto die;
|
||
|
||
resolve (td_log);
|
||
resolve (td_ta_new);
|
||
resolve (td_ta_delete);
|
||
resolve (td_init);
|
||
resolve (td_ta_get_ph);
|
||
resolve (td_ta_get_nthreads);
|
||
resolve (td_ta_tsd_iter);
|
||
resolve (td_ta_thr_iter);
|
||
resolve (td_thr_validate);
|
||
resolve (td_thr_tsd);
|
||
resolve (td_thr_get_info);
|
||
resolve (td_thr_getfpregs);
|
||
resolve (td_thr_getxregsize);
|
||
resolve (td_thr_getxregs);
|
||
resolve (td_thr_sigsetmask);
|
||
resolve (td_thr_setprio);
|
||
resolve (td_thr_setsigpending);
|
||
resolve (td_thr_setfpregs);
|
||
resolve (td_thr_setxregs);
|
||
resolve (td_ta_map_id2thr);
|
||
resolve (td_ta_map_lwp2thr);
|
||
resolve (td_thr_getgregs);
|
||
resolve (td_thr_setgregs);
|
||
|
||
add_cmd ("sol-threads", class_maintenance, info_solthreads,
|
||
_("Show info on Solaris user threads."), &maintenanceinfolist);
|
||
|
||
/* Hook into new_objfile notification. */
|
||
gdb::observers::new_objfile.attach (sol_thread_new_objfile);
|
||
return;
|
||
|
||
die:
|
||
fprintf_unfiltered (gdb_stderr, "\
|
||
[GDB will not be able to debug user-mode threads: %s]\n", dlerror ());
|
||
|
||
if (dlhandle)
|
||
dlclose (dlhandle);
|
||
|
||
return;
|
||
}
|