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.
3391 lines
98 KiB
C
3391 lines
98 KiB
C
/* Target-vector operations for controlling windows child processes, for GDB.
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Copyright (C) 1995-2020 Free Software Foundation, Inc.
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Contributed by Cygnus Solutions, A Red Hat Company.
|
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
|
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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|
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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/* Originally by Steve Chamberlain, sac@cygnus.com */
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#include "defs.h"
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#include "frame.h" /* required by inferior.h */
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#include "inferior.h"
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#include "infrun.h"
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#include "target.h"
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#include "gdbcore.h"
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#include "command.h"
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#include "completer.h"
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#include "regcache.h"
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#include "top.h"
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#include <signal.h>
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#include <sys/types.h>
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#include <fcntl.h>
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#include <windows.h>
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#include <imagehlp.h>
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#include <psapi.h>
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#ifdef __CYGWIN__
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#include <wchar.h>
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#include <sys/cygwin.h>
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#include <cygwin/version.h>
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#endif
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#include <algorithm>
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|
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#include "filenames.h"
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#include "symfile.h"
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#include "objfiles.h"
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#include "gdb_bfd.h"
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#include "gdb_obstack.h"
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#include "gdbthread.h"
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#include "gdbcmd.h"
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#include <unistd.h>
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|
#include "exec.h"
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#include "solist.h"
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|
#include "solib.h"
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#include "xml-support.h"
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|
#include "inttypes.h"
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|
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#include "i386-tdep.h"
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#include "i387-tdep.h"
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#include "windows-tdep.h"
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#include "windows-nat.h"
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#include "x86-nat.h"
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#include "complaints.h"
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#include "inf-child.h"
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#include "gdbsupport/gdb_tilde_expand.h"
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#include "gdbsupport/pathstuff.h"
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#include "gdbsupport/gdb_wait.h"
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|
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#define AdjustTokenPrivileges dyn_AdjustTokenPrivileges
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#define DebugActiveProcessStop dyn_DebugActiveProcessStop
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#define DebugBreakProcess dyn_DebugBreakProcess
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#define DebugSetProcessKillOnExit dyn_DebugSetProcessKillOnExit
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#define EnumProcessModules dyn_EnumProcessModules
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#define GetModuleInformation dyn_GetModuleInformation
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#define LookupPrivilegeValueA dyn_LookupPrivilegeValueA
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#define OpenProcessToken dyn_OpenProcessToken
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#define GetConsoleFontSize dyn_GetConsoleFontSize
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#define GetCurrentConsoleFont dyn_GetCurrentConsoleFont
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typedef BOOL WINAPI (AdjustTokenPrivileges_ftype) (HANDLE, BOOL,
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PTOKEN_PRIVILEGES,
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DWORD, PTOKEN_PRIVILEGES,
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PDWORD);
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static AdjustTokenPrivileges_ftype *AdjustTokenPrivileges;
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typedef BOOL WINAPI (DebugActiveProcessStop_ftype) (DWORD);
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static DebugActiveProcessStop_ftype *DebugActiveProcessStop;
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typedef BOOL WINAPI (DebugBreakProcess_ftype) (HANDLE);
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static DebugBreakProcess_ftype *DebugBreakProcess;
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typedef BOOL WINAPI (DebugSetProcessKillOnExit_ftype) (BOOL);
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static DebugSetProcessKillOnExit_ftype *DebugSetProcessKillOnExit;
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typedef BOOL WINAPI (EnumProcessModules_ftype) (HANDLE, HMODULE *, DWORD,
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LPDWORD);
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static EnumProcessModules_ftype *EnumProcessModules;
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typedef BOOL WINAPI (GetModuleInformation_ftype) (HANDLE, HMODULE,
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LPMODULEINFO, DWORD);
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static GetModuleInformation_ftype *GetModuleInformation;
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typedef BOOL WINAPI (LookupPrivilegeValueA_ftype) (LPCSTR, LPCSTR, PLUID);
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static LookupPrivilegeValueA_ftype *LookupPrivilegeValueA;
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typedef BOOL WINAPI (OpenProcessToken_ftype) (HANDLE, DWORD, PHANDLE);
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static OpenProcessToken_ftype *OpenProcessToken;
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typedef BOOL WINAPI (GetCurrentConsoleFont_ftype) (HANDLE, BOOL,
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CONSOLE_FONT_INFO *);
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static GetCurrentConsoleFont_ftype *GetCurrentConsoleFont;
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typedef COORD WINAPI (GetConsoleFontSize_ftype) (HANDLE, DWORD);
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static GetConsoleFontSize_ftype *GetConsoleFontSize;
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#undef STARTUPINFO
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#undef CreateProcess
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#undef GetModuleFileNameEx
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#ifndef __CYGWIN__
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# define __PMAX (MAX_PATH + 1)
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typedef DWORD WINAPI (GetModuleFileNameEx_ftype) (HANDLE, HMODULE, LPSTR, DWORD);
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static GetModuleFileNameEx_ftype *GetModuleFileNameEx;
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# define STARTUPINFO STARTUPINFOA
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# define CreateProcess CreateProcessA
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# define GetModuleFileNameEx_name "GetModuleFileNameExA"
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# define bad_GetModuleFileNameEx bad_GetModuleFileNameExA
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#else
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# define __PMAX PATH_MAX
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/* The starting and ending address of the cygwin1.dll text segment. */
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static CORE_ADDR cygwin_load_start;
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static CORE_ADDR cygwin_load_end;
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# define __USEWIDE
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typedef wchar_t cygwin_buf_t;
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typedef DWORD WINAPI (GetModuleFileNameEx_ftype) (HANDLE, HMODULE,
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LPWSTR, DWORD);
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static GetModuleFileNameEx_ftype *GetModuleFileNameEx;
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# define STARTUPINFO STARTUPINFOW
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# define CreateProcess CreateProcessW
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# define GetModuleFileNameEx_name "GetModuleFileNameExW"
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# define bad_GetModuleFileNameEx bad_GetModuleFileNameExW
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#endif
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static int have_saved_context; /* True if we've saved context from a
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cygwin signal. */
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#ifdef __CYGWIN__
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static CONTEXT saved_context; /* Contains the saved context from a
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cygwin signal. */
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#endif
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/* If we're not using the old Cygwin header file set, define the
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following which never should have been in the generic Win32 API
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headers in the first place since they were our own invention... */
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#ifndef _GNU_H_WINDOWS_H
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enum
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{
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FLAG_TRACE_BIT = 0x100,
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};
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#endif
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#ifndef CONTEXT_EXTENDED_REGISTERS
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/* This macro is only defined on ia32. It only makes sense on this target,
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so define it as zero if not already defined. */
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#define CONTEXT_EXTENDED_REGISTERS 0
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#endif
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#define CONTEXT_DEBUGGER_DR CONTEXT_FULL | CONTEXT_FLOATING_POINT \
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| CONTEXT_SEGMENTS | CONTEXT_DEBUG_REGISTERS \
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| CONTEXT_EXTENDED_REGISTERS
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static uintptr_t dr[8];
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static int debug_registers_changed;
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static int debug_registers_used;
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static int windows_initialization_done;
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#define DR6_CLEAR_VALUE 0xffff0ff0
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/* The exception thrown by a program to tell the debugger the name of
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a thread. The exception record contains an ID of a thread and a
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name to give it. This exception has no documented name, but MSDN
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dubs it "MS_VC_EXCEPTION" in one code example. */
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#define MS_VC_EXCEPTION 0x406d1388
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typedef enum
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{
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HANDLE_EXCEPTION_UNHANDLED = 0,
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HANDLE_EXCEPTION_HANDLED,
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HANDLE_EXCEPTION_IGNORED
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} handle_exception_result;
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/* The string sent by cygwin when it processes a signal.
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FIXME: This should be in a cygwin include file. */
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#ifndef _CYGWIN_SIGNAL_STRING
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#define _CYGWIN_SIGNAL_STRING "cYgSiGw00f"
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#endif
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#define CHECK(x) check (x, __FILE__,__LINE__)
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#define DEBUG_EXEC(x) if (debug_exec) printf_unfiltered x
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#define DEBUG_EVENTS(x) if (debug_events) printf_unfiltered x
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#define DEBUG_MEM(x) if (debug_memory) printf_unfiltered x
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#define DEBUG_EXCEPT(x) if (debug_exceptions) printf_unfiltered x
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static void cygwin_set_dr (int i, CORE_ADDR addr);
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static void cygwin_set_dr7 (unsigned long val);
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static CORE_ADDR cygwin_get_dr (int i);
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static unsigned long cygwin_get_dr6 (void);
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static unsigned long cygwin_get_dr7 (void);
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static enum gdb_signal last_sig = GDB_SIGNAL_0;
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/* Set if a signal was received from the debugged process. */
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|
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/* Thread information structure used to track information that is
|
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not available in gdb's thread structure. */
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typedef struct windows_thread_info_struct
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{
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struct windows_thread_info_struct *next;
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DWORD id;
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HANDLE h;
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CORE_ADDR thread_local_base;
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char *name;
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int suspended;
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int reload_context;
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CONTEXT context;
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}
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windows_thread_info;
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static windows_thread_info thread_head;
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/* The process and thread handles for the above context. */
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|
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static DEBUG_EVENT current_event; /* The current debug event from
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WaitForDebugEvent */
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static HANDLE current_process_handle; /* Currently executing process */
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static windows_thread_info *current_thread; /* Info on currently selected thread */
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|
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/* Counts of things. */
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static int exception_count = 0;
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static int event_count = 0;
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static int saw_create;
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static int open_process_used = 0;
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|
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/* User options. */
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|
static bool new_console = false;
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#ifdef __CYGWIN__
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static bool cygwin_exceptions = false;
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#endif
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static bool new_group = true;
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static bool debug_exec = false; /* show execution */
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static bool debug_events = false; /* show events from kernel */
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static bool debug_memory = false; /* show target memory accesses */
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static bool debug_exceptions = false; /* show target exceptions */
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static bool useshell = false; /* use shell for subprocesses */
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|
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/* This vector maps GDB's idea of a register's number into an offset
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in the windows exception context vector.
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It also contains the bit mask needed to load the register in question.
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The contents of this table can only be computed by the units
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|
that provide CPU-specific support for Windows native debugging.
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|
These units should set the table by calling
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windows_set_context_register_offsets.
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|
|
|
One day we could read a reg, we could inspect the context we
|
|
already have loaded, if it doesn't have the bit set that we need,
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|
we read that set of registers in using GetThreadContext. If the
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|
context already contains what we need, we just unpack it. Then to
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write a register, first we have to ensure that the context contains
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the other regs of the group, and then we copy the info in and set
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out bit. */
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|
|
static const int *mappings;
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|
|
/* The function to use in order to determine whether a register is
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|
a segment register or not. */
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static segment_register_p_ftype *segment_register_p;
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|
|
/* See windows_nat_target::resume to understand why this is commented
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out. */
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#if 0
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|
/* This vector maps the target's idea of an exception (extracted
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|
from the DEBUG_EVENT structure) to GDB's idea. */
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|
|
|
struct xlate_exception
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|
{
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|
DWORD them;
|
|
enum gdb_signal us;
|
|
};
|
|
|
|
static const struct xlate_exception xlate[] =
|
|
{
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|
{EXCEPTION_ACCESS_VIOLATION, GDB_SIGNAL_SEGV},
|
|
{STATUS_STACK_OVERFLOW, GDB_SIGNAL_SEGV},
|
|
{EXCEPTION_BREAKPOINT, GDB_SIGNAL_TRAP},
|
|
{DBG_CONTROL_C, GDB_SIGNAL_INT},
|
|
{EXCEPTION_SINGLE_STEP, GDB_SIGNAL_TRAP},
|
|
{STATUS_FLOAT_DIVIDE_BY_ZERO, GDB_SIGNAL_FPE}
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|
};
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|
|
#endif /* 0 */
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|
|
struct windows_nat_target final : public x86_nat_target<inf_child_target>
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|
{
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|
void close () override;
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|
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void attach (const char *, int) override;
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|
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bool attach_no_wait () override
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{ return true; }
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|
|
void detach (inferior *, int) override;
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void resume (ptid_t, int , enum gdb_signal) override;
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ptid_t wait (ptid_t, struct target_waitstatus *, int) override;
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void fetch_registers (struct regcache *, int) override;
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void store_registers (struct regcache *, int) override;
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enum target_xfer_status xfer_partial (enum target_object object,
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const char *annex,
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gdb_byte *readbuf,
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const gdb_byte *writebuf,
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|
ULONGEST offset, ULONGEST len,
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ULONGEST *xfered_len) override;
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void files_info () override;
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void kill () override;
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void create_inferior (const char *, const std::string &,
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char **, int) override;
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void mourn_inferior () override;
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bool thread_alive (ptid_t ptid) override;
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std::string pid_to_str (ptid_t) override;
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void interrupt () override;
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char *pid_to_exec_file (int pid) override;
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ptid_t get_ada_task_ptid (long lwp, long thread) override;
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bool get_tib_address (ptid_t ptid, CORE_ADDR *addr) override;
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const char *thread_name (struct thread_info *) override;
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int get_windows_debug_event (int pid, struct target_waitstatus *ourstatus);
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};
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|
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static windows_nat_target the_windows_nat_target;
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|
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/* Set the MAPPINGS static global to OFFSETS.
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|
See the description of MAPPINGS for more details. */
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|
|
void
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windows_set_context_register_offsets (const int *offsets)
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{
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mappings = offsets;
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}
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|
|
/* See windows-nat.h. */
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|
|
void
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windows_set_segment_register_p (segment_register_p_ftype *fun)
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|
{
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segment_register_p = fun;
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}
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|
|
static void
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|
check (BOOL ok, const char *file, int line)
|
|
{
|
|
if (!ok)
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|
printf_filtered ("error return %s:%d was %u\n", file, line,
|
|
(unsigned) GetLastError ());
|
|
}
|
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|
|
/* Find a thread record given a thread id. If GET_CONTEXT is not 0,
|
|
then also retrieve the context for this thread. If GET_CONTEXT is
|
|
negative, then don't suspend the thread. */
|
|
static windows_thread_info *
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thread_rec (DWORD id, int get_context)
|
|
{
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|
windows_thread_info *th;
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|
|
|
for (th = &thread_head; (th = th->next) != NULL;)
|
|
if (th->id == id)
|
|
{
|
|
if (!th->suspended && get_context)
|
|
{
|
|
if (get_context > 0 && id != current_event.dwThreadId)
|
|
{
|
|
if (SuspendThread (th->h) == (DWORD) -1)
|
|
{
|
|
DWORD err = GetLastError ();
|
|
|
|
/* We get Access Denied (5) when trying to suspend
|
|
threads that Windows started on behalf of the
|
|
debuggee, usually when those threads are just
|
|
about to exit.
|
|
We can get Invalid Handle (6) if the main thread
|
|
has exited. */
|
|
if (err != ERROR_INVALID_HANDLE
|
|
&& err != ERROR_ACCESS_DENIED)
|
|
warning (_("SuspendThread (tid=0x%x) failed."
|
|
" (winerr %u)"),
|
|
(unsigned) id, (unsigned) err);
|
|
th->suspended = -1;
|
|
}
|
|
else
|
|
th->suspended = 1;
|
|
}
|
|
else if (get_context < 0)
|
|
th->suspended = -1;
|
|
th->reload_context = 1;
|
|
}
|
|
return th;
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
/* Add a thread to the thread list.
|
|
|
|
PTID is the ptid of the thread to be added.
|
|
H is its Windows handle.
|
|
TLB is its thread local base.
|
|
MAIN_THREAD_P should be true if the thread to be added is
|
|
the main thread, false otherwise. */
|
|
|
|
static windows_thread_info *
|
|
windows_add_thread (ptid_t ptid, HANDLE h, void *tlb, bool main_thread_p)
|
|
{
|
|
windows_thread_info *th;
|
|
DWORD id;
|
|
|
|
gdb_assert (ptid.tid () != 0);
|
|
|
|
id = ptid.tid ();
|
|
|
|
if ((th = thread_rec (id, FALSE)))
|
|
return th;
|
|
|
|
th = XCNEW (windows_thread_info);
|
|
th->id = id;
|
|
th->h = h;
|
|
th->thread_local_base = (CORE_ADDR) (uintptr_t) tlb;
|
|
th->next = thread_head.next;
|
|
thread_head.next = th;
|
|
|
|
/* Add this new thread to the list of threads.
|
|
|
|
To be consistent with what's done on other platforms, we add
|
|
the main thread silently (in reality, this thread is really
|
|
more of a process to the user than a thread). */
|
|
if (main_thread_p)
|
|
add_thread_silent (&the_windows_nat_target, ptid);
|
|
else
|
|
add_thread (&the_windows_nat_target, ptid);
|
|
|
|
/* Set the debug registers for the new thread if they are used. */
|
|
if (debug_registers_used)
|
|
{
|
|
/* Only change the value of the debug registers. */
|
|
th->context.ContextFlags = CONTEXT_DEBUG_REGISTERS;
|
|
CHECK (GetThreadContext (th->h, &th->context));
|
|
th->context.Dr0 = dr[0];
|
|
th->context.Dr1 = dr[1];
|
|
th->context.Dr2 = dr[2];
|
|
th->context.Dr3 = dr[3];
|
|
th->context.Dr6 = DR6_CLEAR_VALUE;
|
|
th->context.Dr7 = dr[7];
|
|
CHECK (SetThreadContext (th->h, &th->context));
|
|
th->context.ContextFlags = 0;
|
|
}
|
|
return th;
|
|
}
|
|
|
|
/* Clear out any old thread list and reinitialize it to a
|
|
pristine state. */
|
|
static void
|
|
windows_init_thread_list (void)
|
|
{
|
|
windows_thread_info *th = &thread_head;
|
|
|
|
DEBUG_EVENTS (("gdb: windows_init_thread_list\n"));
|
|
init_thread_list ();
|
|
while (th->next != NULL)
|
|
{
|
|
windows_thread_info *here = th->next;
|
|
th->next = here->next;
|
|
xfree (here);
|
|
}
|
|
thread_head.next = NULL;
|
|
}
|
|
|
|
/* Delete a thread from the list of threads.
|
|
|
|
PTID is the ptid of the thread to be deleted.
|
|
EXIT_CODE is the thread's exit code.
|
|
MAIN_THREAD_P should be true if the thread to be deleted is
|
|
the main thread, false otherwise. */
|
|
|
|
static void
|
|
windows_delete_thread (ptid_t ptid, DWORD exit_code, bool main_thread_p)
|
|
{
|
|
windows_thread_info *th;
|
|
DWORD id;
|
|
|
|
gdb_assert (ptid.tid () != 0);
|
|
|
|
id = ptid.tid ();
|
|
|
|
/* Emit a notification about the thread being deleted.
|
|
|
|
Note that no notification was printed when the main thread
|
|
was created, and thus, unless in verbose mode, we should be
|
|
symmetrical, and avoid that notification for the main thread
|
|
here as well. */
|
|
|
|
if (info_verbose)
|
|
printf_unfiltered ("[Deleting %s]\n", target_pid_to_str (ptid).c_str ());
|
|
else if (print_thread_events && !main_thread_p)
|
|
printf_unfiltered (_("[%s exited with code %u]\n"),
|
|
target_pid_to_str (ptid).c_str (),
|
|
(unsigned) exit_code);
|
|
|
|
delete_thread (find_thread_ptid (&the_windows_nat_target, ptid));
|
|
|
|
for (th = &thread_head;
|
|
th->next != NULL && th->next->id != id;
|
|
th = th->next)
|
|
continue;
|
|
|
|
if (th->next != NULL)
|
|
{
|
|
windows_thread_info *here = th->next;
|
|
th->next = here->next;
|
|
xfree (here->name);
|
|
xfree (here);
|
|
}
|
|
}
|
|
|
|
/* Fetches register number R from the given windows_thread_info,
|
|
and supplies its value to the given regcache.
|
|
|
|
This function assumes that R is non-negative. A failed assertion
|
|
is raised if that is not true.
|
|
|
|
This function assumes that TH->RELOAD_CONTEXT is not set, meaning
|
|
that the windows_thread_info has an up-to-date context. A failed
|
|
assertion is raised if that assumption is violated. */
|
|
|
|
static void
|
|
windows_fetch_one_register (struct regcache *regcache,
|
|
windows_thread_info *th, int r)
|
|
{
|
|
gdb_assert (r >= 0);
|
|
gdb_assert (!th->reload_context);
|
|
|
|
char *context_offset = ((char *) &th->context) + mappings[r];
|
|
struct gdbarch *gdbarch = regcache->arch ();
|
|
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
|
|
|
|
if (r == I387_FISEG_REGNUM (tdep))
|
|
{
|
|
long l = *((long *) context_offset) & 0xffff;
|
|
regcache->raw_supply (r, (char *) &l);
|
|
}
|
|
else if (r == I387_FOP_REGNUM (tdep))
|
|
{
|
|
long l = (*((long *) context_offset) >> 16) & ((1 << 11) - 1);
|
|
regcache->raw_supply (r, (char *) &l);
|
|
}
|
|
else if (segment_register_p (r))
|
|
{
|
|
/* GDB treats segment registers as 32bit registers, but they are
|
|
in fact only 16 bits long. Make sure we do not read extra
|
|
bits from our source buffer. */
|
|
long l = *((long *) context_offset) & 0xffff;
|
|
regcache->raw_supply (r, (char *) &l);
|
|
}
|
|
else
|
|
regcache->raw_supply (r, context_offset);
|
|
}
|
|
|
|
void
|
|
windows_nat_target::fetch_registers (struct regcache *regcache, int r)
|
|
{
|
|
DWORD tid = regcache->ptid ().tid ();
|
|
windows_thread_info *th = thread_rec (tid, TRUE);
|
|
|
|
/* Check if TH exists. Windows sometimes uses a non-existent
|
|
thread id in its events. */
|
|
if (th == NULL)
|
|
return;
|
|
|
|
if (th->reload_context)
|
|
{
|
|
#ifdef __CYGWIN__
|
|
if (have_saved_context)
|
|
{
|
|
/* Lie about where the program actually is stopped since
|
|
cygwin has informed us that we should consider the signal
|
|
to have occurred at another location which is stored in
|
|
"saved_context. */
|
|
memcpy (&th->context, &saved_context,
|
|
__COPY_CONTEXT_SIZE);
|
|
have_saved_context = 0;
|
|
}
|
|
else
|
|
#endif
|
|
{
|
|
th->context.ContextFlags = CONTEXT_DEBUGGER_DR;
|
|
CHECK (GetThreadContext (th->h, &th->context));
|
|
/* Copy dr values from that thread.
|
|
But only if there were not modified since last stop.
|
|
PR gdb/2388 */
|
|
if (!debug_registers_changed)
|
|
{
|
|
dr[0] = th->context.Dr0;
|
|
dr[1] = th->context.Dr1;
|
|
dr[2] = th->context.Dr2;
|
|
dr[3] = th->context.Dr3;
|
|
dr[6] = th->context.Dr6;
|
|
dr[7] = th->context.Dr7;
|
|
}
|
|
}
|
|
th->reload_context = 0;
|
|
}
|
|
|
|
if (r < 0)
|
|
for (r = 0; r < gdbarch_num_regs (regcache->arch()); r++)
|
|
windows_fetch_one_register (regcache, th, r);
|
|
else
|
|
windows_fetch_one_register (regcache, th, r);
|
|
}
|
|
|
|
/* Collect the register number R from the given regcache, and store
|
|
its value into the corresponding area of the given thread's context.
|
|
|
|
This function assumes that R is non-negative. A failed assertion
|
|
assertion is raised if that is not true. */
|
|
|
|
static void
|
|
windows_store_one_register (const struct regcache *regcache,
|
|
windows_thread_info *th, int r)
|
|
{
|
|
gdb_assert (r >= 0);
|
|
|
|
regcache->raw_collect (r, ((char *) &th->context) + mappings[r]);
|
|
}
|
|
|
|
/* Store a new register value into the context of the thread tied to
|
|
REGCACHE. */
|
|
|
|
void
|
|
windows_nat_target::store_registers (struct regcache *regcache, int r)
|
|
{
|
|
DWORD tid = regcache->ptid ().tid ();
|
|
windows_thread_info *th = thread_rec (tid, TRUE);
|
|
|
|
/* Check if TH exists. Windows sometimes uses a non-existent
|
|
thread id in its events. */
|
|
if (th == NULL)
|
|
return;
|
|
|
|
if (r < 0)
|
|
for (r = 0; r < gdbarch_num_regs (regcache->arch ()); r++)
|
|
windows_store_one_register (regcache, th, r);
|
|
else
|
|
windows_store_one_register (regcache, th, r);
|
|
}
|
|
|
|
/* Maintain a linked list of "so" information. */
|
|
struct lm_info_windows : public lm_info_base
|
|
{
|
|
LPVOID load_addr = 0;
|
|
};
|
|
|
|
static struct so_list solib_start, *solib_end;
|
|
|
|
static struct so_list *
|
|
windows_make_so (const char *name, LPVOID load_addr)
|
|
{
|
|
struct so_list *so;
|
|
char *p;
|
|
#ifndef __CYGWIN__
|
|
char buf[__PMAX];
|
|
char cwd[__PMAX];
|
|
WIN32_FIND_DATA w32_fd;
|
|
HANDLE h = FindFirstFile(name, &w32_fd);
|
|
|
|
if (h == INVALID_HANDLE_VALUE)
|
|
strcpy (buf, name);
|
|
else
|
|
{
|
|
FindClose (h);
|
|
strcpy (buf, name);
|
|
if (GetCurrentDirectory (MAX_PATH + 1, cwd))
|
|
{
|
|
p = strrchr (buf, '\\');
|
|
if (p)
|
|
p[1] = '\0';
|
|
SetCurrentDirectory (buf);
|
|
GetFullPathName (w32_fd.cFileName, MAX_PATH, buf, &p);
|
|
SetCurrentDirectory (cwd);
|
|
}
|
|
}
|
|
if (strcasecmp (buf, "ntdll.dll") == 0)
|
|
{
|
|
GetSystemDirectory (buf, sizeof (buf));
|
|
strcat (buf, "\\ntdll.dll");
|
|
}
|
|
#else
|
|
cygwin_buf_t buf[__PMAX];
|
|
|
|
buf[0] = 0;
|
|
if (access (name, F_OK) != 0)
|
|
{
|
|
if (strcasecmp (name, "ntdll.dll") == 0)
|
|
#ifdef __USEWIDE
|
|
{
|
|
GetSystemDirectoryW (buf, sizeof (buf) / sizeof (wchar_t));
|
|
wcscat (buf, L"\\ntdll.dll");
|
|
}
|
|
#else
|
|
{
|
|
GetSystemDirectoryA (buf, sizeof (buf) / sizeof (wchar_t));
|
|
strcat (buf, "\\ntdll.dll");
|
|
}
|
|
#endif
|
|
}
|
|
#endif
|
|
so = XCNEW (struct so_list);
|
|
lm_info_windows *li = new lm_info_windows;
|
|
so->lm_info = li;
|
|
li->load_addr = load_addr;
|
|
strcpy (so->so_original_name, name);
|
|
#ifndef __CYGWIN__
|
|
strcpy (so->so_name, buf);
|
|
#else
|
|
if (buf[0])
|
|
cygwin_conv_path (CCP_WIN_W_TO_POSIX, buf, so->so_name,
|
|
SO_NAME_MAX_PATH_SIZE);
|
|
else
|
|
{
|
|
char *rname = realpath (name, NULL);
|
|
if (rname && strlen (rname) < SO_NAME_MAX_PATH_SIZE)
|
|
{
|
|
strcpy (so->so_name, rname);
|
|
free (rname);
|
|
}
|
|
else
|
|
error (_("dll path too long"));
|
|
}
|
|
/* Record cygwin1.dll .text start/end. */
|
|
p = strchr (so->so_name, '\0') - (sizeof ("/cygwin1.dll") - 1);
|
|
if (p >= so->so_name && strcasecmp (p, "/cygwin1.dll") == 0)
|
|
{
|
|
asection *text = NULL;
|
|
|
|
gdb_bfd_ref_ptr abfd (gdb_bfd_open (so->so_name, "pei-i386", -1));
|
|
|
|
if (abfd == NULL)
|
|
return so;
|
|
|
|
if (bfd_check_format (abfd.get (), bfd_object))
|
|
text = bfd_get_section_by_name (abfd.get (), ".text");
|
|
|
|
if (!text)
|
|
return so;
|
|
|
|
/* The symbols in a dll are offset by 0x1000, which is the
|
|
offset from 0 of the first byte in an image - because of the
|
|
file header and the section alignment. */
|
|
cygwin_load_start = (CORE_ADDR) (uintptr_t) ((char *)
|
|
load_addr + 0x1000);
|
|
cygwin_load_end = cygwin_load_start + bfd_section_size (text);
|
|
}
|
|
#endif
|
|
|
|
return so;
|
|
}
|
|
|
|
static char *
|
|
get_image_name (HANDLE h, void *address, int unicode)
|
|
{
|
|
#ifdef __CYGWIN__
|
|
static char buf[__PMAX];
|
|
#else
|
|
static char buf[(2 * __PMAX) + 1];
|
|
#endif
|
|
DWORD size = unicode ? sizeof (WCHAR) : sizeof (char);
|
|
char *address_ptr;
|
|
int len = 0;
|
|
char b[2];
|
|
SIZE_T done;
|
|
|
|
/* Attempt to read the name of the dll that was detected.
|
|
This is documented to work only when actively debugging
|
|
a program. It will not work for attached processes. */
|
|
if (address == NULL)
|
|
return NULL;
|
|
|
|
/* See if we could read the address of a string, and that the
|
|
address isn't null. */
|
|
if (!ReadProcessMemory (h, address, &address_ptr,
|
|
sizeof (address_ptr), &done)
|
|
|| done != sizeof (address_ptr) || !address_ptr)
|
|
return NULL;
|
|
|
|
/* Find the length of the string. */
|
|
while (ReadProcessMemory (h, address_ptr + len++ * size, &b, size, &done)
|
|
&& (b[0] != 0 || b[size - 1] != 0) && done == size)
|
|
continue;
|
|
|
|
if (!unicode)
|
|
ReadProcessMemory (h, address_ptr, buf, len, &done);
|
|
else
|
|
{
|
|
WCHAR *unicode_address = (WCHAR *) alloca (len * sizeof (WCHAR));
|
|
ReadProcessMemory (h, address_ptr, unicode_address, len * sizeof (WCHAR),
|
|
&done);
|
|
#ifdef __CYGWIN__
|
|
wcstombs (buf, unicode_address, __PMAX);
|
|
#else
|
|
WideCharToMultiByte (CP_ACP, 0, unicode_address, len, buf, sizeof buf,
|
|
0, 0);
|
|
#endif
|
|
}
|
|
|
|
return buf;
|
|
}
|
|
|
|
/* Handle a DLL load event, and return 1.
|
|
|
|
This function assumes that this event did not occur during inferior
|
|
initialization, where their event info may be incomplete (see
|
|
do_initial_windows_stuff and windows_add_all_dlls for more info
|
|
on how we handle DLL loading during that phase). */
|
|
|
|
static void
|
|
handle_load_dll ()
|
|
{
|
|
LOAD_DLL_DEBUG_INFO *event = ¤t_event.u.LoadDll;
|
|
char *dll_name;
|
|
|
|
/* Try getting the DLL name via the lpImageName field of the event.
|
|
Note that Microsoft documents this fields as strictly optional,
|
|
in the sense that it might be NULL. And the first DLL event in
|
|
particular is explicitly documented as "likely not pass[ed]"
|
|
(source: MSDN LOAD_DLL_DEBUG_INFO structure). */
|
|
dll_name = get_image_name (current_process_handle,
|
|
event->lpImageName, event->fUnicode);
|
|
if (!dll_name)
|
|
return;
|
|
|
|
solib_end->next = windows_make_so (dll_name, event->lpBaseOfDll);
|
|
solib_end = solib_end->next;
|
|
|
|
lm_info_windows *li = (lm_info_windows *) solib_end->lm_info;
|
|
|
|
DEBUG_EVENTS (("gdb: Loading dll \"%s\" at %s.\n", solib_end->so_name,
|
|
host_address_to_string (li->load_addr)));
|
|
}
|
|
|
|
static void
|
|
windows_free_so (struct so_list *so)
|
|
{
|
|
lm_info_windows *li = (lm_info_windows *) so->lm_info;
|
|
|
|
delete li;
|
|
xfree (so);
|
|
}
|
|
|
|
/* Handle a DLL unload event.
|
|
Return 1 if successful, or zero otherwise.
|
|
|
|
This function assumes that this event did not occur during inferior
|
|
initialization, where their event info may be incomplete (see
|
|
do_initial_windows_stuff and windows_add_all_dlls for more info
|
|
on how we handle DLL loading during that phase). */
|
|
|
|
static void
|
|
handle_unload_dll ()
|
|
{
|
|
LPVOID lpBaseOfDll = current_event.u.UnloadDll.lpBaseOfDll;
|
|
struct so_list *so;
|
|
|
|
for (so = &solib_start; so->next != NULL; so = so->next)
|
|
{
|
|
lm_info_windows *li_next = (lm_info_windows *) so->next->lm_info;
|
|
|
|
if (li_next->load_addr == lpBaseOfDll)
|
|
{
|
|
struct so_list *sodel = so->next;
|
|
|
|
so->next = sodel->next;
|
|
if (!so->next)
|
|
solib_end = so;
|
|
DEBUG_EVENTS (("gdb: Unloading dll \"%s\".\n", sodel->so_name));
|
|
|
|
windows_free_so (sodel);
|
|
return;
|
|
}
|
|
}
|
|
|
|
/* We did not find any DLL that was previously loaded at this address,
|
|
so register a complaint. We do not report an error, because we have
|
|
observed that this may be happening under some circumstances. For
|
|
instance, running 32bit applications on x64 Windows causes us to receive
|
|
4 mysterious UNLOAD_DLL_DEBUG_EVENTs during the startup phase (these
|
|
events are apparently caused by the WOW layer, the interface between
|
|
32bit and 64bit worlds). */
|
|
complaint (_("dll starting at %s not found."),
|
|
host_address_to_string (lpBaseOfDll));
|
|
}
|
|
|
|
/* Call FUNC wrapped in a TRY/CATCH that swallows all GDB
|
|
exceptions. */
|
|
|
|
static void
|
|
catch_errors (void (*func) ())
|
|
{
|
|
try
|
|
{
|
|
func ();
|
|
}
|
|
catch (const gdb_exception &ex)
|
|
{
|
|
exception_print (gdb_stderr, ex);
|
|
}
|
|
}
|
|
|
|
/* Clear list of loaded DLLs. */
|
|
static void
|
|
windows_clear_solib (void)
|
|
{
|
|
struct so_list *so;
|
|
|
|
for (so = solib_start.next; so; so = solib_start.next)
|
|
{
|
|
solib_start.next = so->next;
|
|
windows_free_so (so);
|
|
}
|
|
|
|
solib_end = &solib_start;
|
|
}
|
|
|
|
static void
|
|
signal_event_command (const char *args, int from_tty)
|
|
{
|
|
uintptr_t event_id = 0;
|
|
char *endargs = NULL;
|
|
|
|
if (args == NULL)
|
|
error (_("signal-event requires an argument (integer event id)"));
|
|
|
|
event_id = strtoumax (args, &endargs, 10);
|
|
|
|
if ((errno == ERANGE) || (event_id == 0) || (event_id > UINTPTR_MAX) ||
|
|
((HANDLE) event_id == INVALID_HANDLE_VALUE))
|
|
error (_("Failed to convert `%s' to event id"), args);
|
|
|
|
SetEvent ((HANDLE) event_id);
|
|
CloseHandle ((HANDLE) event_id);
|
|
}
|
|
|
|
/* Handle DEBUG_STRING output from child process.
|
|
Cygwin prepends its messages with a "cygwin:". Interpret this as
|
|
a Cygwin signal. Otherwise just print the string as a warning. */
|
|
static int
|
|
handle_output_debug_string (struct target_waitstatus *ourstatus)
|
|
{
|
|
gdb::unique_xmalloc_ptr<char> s;
|
|
int retval = 0;
|
|
|
|
if (!target_read_string
|
|
((CORE_ADDR) (uintptr_t) current_event.u.DebugString.lpDebugStringData,
|
|
&s, 1024, 0)
|
|
|| !s || !*(s.get ()))
|
|
/* nothing to do */;
|
|
else if (!startswith (s.get (), _CYGWIN_SIGNAL_STRING))
|
|
{
|
|
#ifdef __CYGWIN__
|
|
if (!startswith (s.get (), "cYg"))
|
|
#endif
|
|
{
|
|
char *p = strchr (s.get (), '\0');
|
|
|
|
if (p > s.get () && *--p == '\n')
|
|
*p = '\0';
|
|
warning (("%s"), s.get ());
|
|
}
|
|
}
|
|
#ifdef __CYGWIN__
|
|
else
|
|
{
|
|
/* Got a cygwin signal marker. A cygwin signal is followed by
|
|
the signal number itself and then optionally followed by the
|
|
thread id and address to saved context within the DLL. If
|
|
these are supplied, then the given thread is assumed to have
|
|
issued the signal and the context from the thread is assumed
|
|
to be stored at the given address in the inferior. Tell gdb
|
|
to treat this like a real signal. */
|
|
char *p;
|
|
int sig = strtol (s.get () + sizeof (_CYGWIN_SIGNAL_STRING) - 1, &p, 0);
|
|
gdb_signal gotasig = gdb_signal_from_host (sig);
|
|
|
|
ourstatus->value.sig = gotasig;
|
|
if (gotasig)
|
|
{
|
|
LPCVOID x;
|
|
SIZE_T n;
|
|
|
|
ourstatus->kind = TARGET_WAITKIND_STOPPED;
|
|
retval = strtoul (p, &p, 0);
|
|
if (!retval)
|
|
retval = current_event.dwThreadId;
|
|
else if ((x = (LPCVOID) (uintptr_t) strtoull (p, NULL, 0))
|
|
&& ReadProcessMemory (current_process_handle, x,
|
|
&saved_context,
|
|
__COPY_CONTEXT_SIZE, &n)
|
|
&& n == __COPY_CONTEXT_SIZE)
|
|
have_saved_context = 1;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
return retval;
|
|
}
|
|
|
|
static int
|
|
display_selector (HANDLE thread, DWORD sel)
|
|
{
|
|
LDT_ENTRY info;
|
|
if (GetThreadSelectorEntry (thread, sel, &info))
|
|
{
|
|
int base, limit;
|
|
printf_filtered ("0x%03x: ", (unsigned) sel);
|
|
if (!info.HighWord.Bits.Pres)
|
|
{
|
|
puts_filtered ("Segment not present\n");
|
|
return 0;
|
|
}
|
|
base = (info.HighWord.Bits.BaseHi << 24) +
|
|
(info.HighWord.Bits.BaseMid << 16)
|
|
+ info.BaseLow;
|
|
limit = (info.HighWord.Bits.LimitHi << 16) + info.LimitLow;
|
|
if (info.HighWord.Bits.Granularity)
|
|
limit = (limit << 12) | 0xfff;
|
|
printf_filtered ("base=0x%08x limit=0x%08x", base, limit);
|
|
if (info.HighWord.Bits.Default_Big)
|
|
puts_filtered(" 32-bit ");
|
|
else
|
|
puts_filtered(" 16-bit ");
|
|
switch ((info.HighWord.Bits.Type & 0xf) >> 1)
|
|
{
|
|
case 0:
|
|
puts_filtered ("Data (Read-Only, Exp-up");
|
|
break;
|
|
case 1:
|
|
puts_filtered ("Data (Read/Write, Exp-up");
|
|
break;
|
|
case 2:
|
|
puts_filtered ("Unused segment (");
|
|
break;
|
|
case 3:
|
|
puts_filtered ("Data (Read/Write, Exp-down");
|
|
break;
|
|
case 4:
|
|
puts_filtered ("Code (Exec-Only, N.Conf");
|
|
break;
|
|
case 5:
|
|
puts_filtered ("Code (Exec/Read, N.Conf");
|
|
break;
|
|
case 6:
|
|
puts_filtered ("Code (Exec-Only, Conf");
|
|
break;
|
|
case 7:
|
|
puts_filtered ("Code (Exec/Read, Conf");
|
|
break;
|
|
default:
|
|
printf_filtered ("Unknown type 0x%lx",
|
|
(unsigned long) info.HighWord.Bits.Type);
|
|
}
|
|
if ((info.HighWord.Bits.Type & 0x1) == 0)
|
|
puts_filtered(", N.Acc");
|
|
puts_filtered (")\n");
|
|
if ((info.HighWord.Bits.Type & 0x10) == 0)
|
|
puts_filtered("System selector ");
|
|
printf_filtered ("Priviledge level = %ld. ",
|
|
(unsigned long) info.HighWord.Bits.Dpl);
|
|
if (info.HighWord.Bits.Granularity)
|
|
puts_filtered ("Page granular.\n");
|
|
else
|
|
puts_filtered ("Byte granular.\n");
|
|
return 1;
|
|
}
|
|
else
|
|
{
|
|
DWORD err = GetLastError ();
|
|
if (err == ERROR_NOT_SUPPORTED)
|
|
printf_filtered ("Function not supported\n");
|
|
else
|
|
printf_filtered ("Invalid selector 0x%x.\n", (unsigned) sel);
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
static void
|
|
display_selectors (const char * args, int from_tty)
|
|
{
|
|
if (!current_thread)
|
|
{
|
|
puts_filtered ("Impossible to display selectors now.\n");
|
|
return;
|
|
}
|
|
if (!args)
|
|
{
|
|
|
|
puts_filtered ("Selector $cs\n");
|
|
display_selector (current_thread->h,
|
|
current_thread->context.SegCs);
|
|
puts_filtered ("Selector $ds\n");
|
|
display_selector (current_thread->h,
|
|
current_thread->context.SegDs);
|
|
puts_filtered ("Selector $es\n");
|
|
display_selector (current_thread->h,
|
|
current_thread->context.SegEs);
|
|
puts_filtered ("Selector $ss\n");
|
|
display_selector (current_thread->h,
|
|
current_thread->context.SegSs);
|
|
puts_filtered ("Selector $fs\n");
|
|
display_selector (current_thread->h,
|
|
current_thread->context.SegFs);
|
|
puts_filtered ("Selector $gs\n");
|
|
display_selector (current_thread->h,
|
|
current_thread->context.SegGs);
|
|
}
|
|
else
|
|
{
|
|
int sel;
|
|
sel = parse_and_eval_long (args);
|
|
printf_filtered ("Selector \"%s\"\n",args);
|
|
display_selector (current_thread->h, sel);
|
|
}
|
|
}
|
|
|
|
#define DEBUG_EXCEPTION_SIMPLE(x) if (debug_exceptions) \
|
|
printf_unfiltered ("gdb: Target exception %s at %s\n", x, \
|
|
host_address_to_string (\
|
|
current_event.u.Exception.ExceptionRecord.ExceptionAddress))
|
|
|
|
static handle_exception_result
|
|
handle_exception (struct target_waitstatus *ourstatus)
|
|
{
|
|
EXCEPTION_RECORD *rec = ¤t_event.u.Exception.ExceptionRecord;
|
|
DWORD code = rec->ExceptionCode;
|
|
handle_exception_result result = HANDLE_EXCEPTION_HANDLED;
|
|
|
|
ourstatus->kind = TARGET_WAITKIND_STOPPED;
|
|
|
|
/* Record the context of the current thread. */
|
|
thread_rec (current_event.dwThreadId, -1);
|
|
|
|
switch (code)
|
|
{
|
|
case EXCEPTION_ACCESS_VIOLATION:
|
|
DEBUG_EXCEPTION_SIMPLE ("EXCEPTION_ACCESS_VIOLATION");
|
|
ourstatus->value.sig = GDB_SIGNAL_SEGV;
|
|
#ifdef __CYGWIN__
|
|
{
|
|
/* See if the access violation happened within the cygwin DLL
|
|
itself. Cygwin uses a kind of exception handling to deal
|
|
with passed-in invalid addresses. gdb should not treat
|
|
these as real SEGVs since they will be silently handled by
|
|
cygwin. A real SEGV will (theoretically) be caught by
|
|
cygwin later in the process and will be sent as a
|
|
cygwin-specific-signal. So, ignore SEGVs if they show up
|
|
within the text segment of the DLL itself. */
|
|
const char *fn;
|
|
CORE_ADDR addr = (CORE_ADDR) (uintptr_t) rec->ExceptionAddress;
|
|
|
|
if ((!cygwin_exceptions && (addr >= cygwin_load_start
|
|
&& addr < cygwin_load_end))
|
|
|| (find_pc_partial_function (addr, &fn, NULL, NULL)
|
|
&& startswith (fn, "KERNEL32!IsBad")))
|
|
return HANDLE_EXCEPTION_UNHANDLED;
|
|
}
|
|
#endif
|
|
break;
|
|
case STATUS_STACK_OVERFLOW:
|
|
DEBUG_EXCEPTION_SIMPLE ("STATUS_STACK_OVERFLOW");
|
|
ourstatus->value.sig = GDB_SIGNAL_SEGV;
|
|
break;
|
|
case STATUS_FLOAT_DENORMAL_OPERAND:
|
|
DEBUG_EXCEPTION_SIMPLE ("STATUS_FLOAT_DENORMAL_OPERAND");
|
|
ourstatus->value.sig = GDB_SIGNAL_FPE;
|
|
break;
|
|
case EXCEPTION_ARRAY_BOUNDS_EXCEEDED:
|
|
DEBUG_EXCEPTION_SIMPLE ("EXCEPTION_ARRAY_BOUNDS_EXCEEDED");
|
|
ourstatus->value.sig = GDB_SIGNAL_FPE;
|
|
break;
|
|
case STATUS_FLOAT_INEXACT_RESULT:
|
|
DEBUG_EXCEPTION_SIMPLE ("STATUS_FLOAT_INEXACT_RESULT");
|
|
ourstatus->value.sig = GDB_SIGNAL_FPE;
|
|
break;
|
|
case STATUS_FLOAT_INVALID_OPERATION:
|
|
DEBUG_EXCEPTION_SIMPLE ("STATUS_FLOAT_INVALID_OPERATION");
|
|
ourstatus->value.sig = GDB_SIGNAL_FPE;
|
|
break;
|
|
case STATUS_FLOAT_OVERFLOW:
|
|
DEBUG_EXCEPTION_SIMPLE ("STATUS_FLOAT_OVERFLOW");
|
|
ourstatus->value.sig = GDB_SIGNAL_FPE;
|
|
break;
|
|
case STATUS_FLOAT_STACK_CHECK:
|
|
DEBUG_EXCEPTION_SIMPLE ("STATUS_FLOAT_STACK_CHECK");
|
|
ourstatus->value.sig = GDB_SIGNAL_FPE;
|
|
break;
|
|
case STATUS_FLOAT_UNDERFLOW:
|
|
DEBUG_EXCEPTION_SIMPLE ("STATUS_FLOAT_UNDERFLOW");
|
|
ourstatus->value.sig = GDB_SIGNAL_FPE;
|
|
break;
|
|
case STATUS_FLOAT_DIVIDE_BY_ZERO:
|
|
DEBUG_EXCEPTION_SIMPLE ("STATUS_FLOAT_DIVIDE_BY_ZERO");
|
|
ourstatus->value.sig = GDB_SIGNAL_FPE;
|
|
break;
|
|
case STATUS_INTEGER_DIVIDE_BY_ZERO:
|
|
DEBUG_EXCEPTION_SIMPLE ("STATUS_INTEGER_DIVIDE_BY_ZERO");
|
|
ourstatus->value.sig = GDB_SIGNAL_FPE;
|
|
break;
|
|
case STATUS_INTEGER_OVERFLOW:
|
|
DEBUG_EXCEPTION_SIMPLE ("STATUS_INTEGER_OVERFLOW");
|
|
ourstatus->value.sig = GDB_SIGNAL_FPE;
|
|
break;
|
|
case EXCEPTION_BREAKPOINT:
|
|
DEBUG_EXCEPTION_SIMPLE ("EXCEPTION_BREAKPOINT");
|
|
ourstatus->value.sig = GDB_SIGNAL_TRAP;
|
|
break;
|
|
case DBG_CONTROL_C:
|
|
DEBUG_EXCEPTION_SIMPLE ("DBG_CONTROL_C");
|
|
ourstatus->value.sig = GDB_SIGNAL_INT;
|
|
break;
|
|
case DBG_CONTROL_BREAK:
|
|
DEBUG_EXCEPTION_SIMPLE ("DBG_CONTROL_BREAK");
|
|
ourstatus->value.sig = GDB_SIGNAL_INT;
|
|
break;
|
|
case EXCEPTION_SINGLE_STEP:
|
|
DEBUG_EXCEPTION_SIMPLE ("EXCEPTION_SINGLE_STEP");
|
|
ourstatus->value.sig = GDB_SIGNAL_TRAP;
|
|
break;
|
|
case EXCEPTION_ILLEGAL_INSTRUCTION:
|
|
DEBUG_EXCEPTION_SIMPLE ("EXCEPTION_ILLEGAL_INSTRUCTION");
|
|
ourstatus->value.sig = GDB_SIGNAL_ILL;
|
|
break;
|
|
case EXCEPTION_PRIV_INSTRUCTION:
|
|
DEBUG_EXCEPTION_SIMPLE ("EXCEPTION_PRIV_INSTRUCTION");
|
|
ourstatus->value.sig = GDB_SIGNAL_ILL;
|
|
break;
|
|
case EXCEPTION_NONCONTINUABLE_EXCEPTION:
|
|
DEBUG_EXCEPTION_SIMPLE ("EXCEPTION_NONCONTINUABLE_EXCEPTION");
|
|
ourstatus->value.sig = GDB_SIGNAL_ILL;
|
|
break;
|
|
case MS_VC_EXCEPTION:
|
|
if (rec->NumberParameters >= 3
|
|
&& (rec->ExceptionInformation[0] & 0xffffffff) == 0x1000)
|
|
{
|
|
DWORD named_thread_id;
|
|
windows_thread_info *named_thread;
|
|
CORE_ADDR thread_name_target;
|
|
|
|
DEBUG_EXCEPTION_SIMPLE ("MS_VC_EXCEPTION");
|
|
|
|
thread_name_target = rec->ExceptionInformation[1];
|
|
named_thread_id = (DWORD) (0xffffffff & rec->ExceptionInformation[2]);
|
|
|
|
if (named_thread_id == (DWORD) -1)
|
|
named_thread_id = current_event.dwThreadId;
|
|
|
|
named_thread = thread_rec (named_thread_id, 0);
|
|
if (named_thread != NULL)
|
|
{
|
|
int thread_name_len;
|
|
gdb::unique_xmalloc_ptr<char> thread_name;
|
|
|
|
thread_name_len = target_read_string (thread_name_target,
|
|
&thread_name, 1025, NULL);
|
|
if (thread_name_len > 0)
|
|
{
|
|
thread_name.get ()[thread_name_len - 1] = '\0';
|
|
xfree (named_thread->name);
|
|
named_thread->name = thread_name.release ();
|
|
}
|
|
}
|
|
ourstatus->value.sig = GDB_SIGNAL_TRAP;
|
|
result = HANDLE_EXCEPTION_IGNORED;
|
|
break;
|
|
}
|
|
/* treat improperly formed exception as unknown */
|
|
/* FALLTHROUGH */
|
|
default:
|
|
/* Treat unhandled first chance exceptions specially. */
|
|
if (current_event.u.Exception.dwFirstChance)
|
|
return HANDLE_EXCEPTION_UNHANDLED;
|
|
printf_unfiltered ("gdb: unknown target exception 0x%08x at %s\n",
|
|
(unsigned) current_event.u.Exception.ExceptionRecord.ExceptionCode,
|
|
host_address_to_string (
|
|
current_event.u.Exception.ExceptionRecord.ExceptionAddress));
|
|
ourstatus->value.sig = GDB_SIGNAL_UNKNOWN;
|
|
break;
|
|
}
|
|
exception_count++;
|
|
last_sig = ourstatus->value.sig;
|
|
return result;
|
|
}
|
|
|
|
/* Resume thread specified by ID, or all artificially suspended
|
|
threads, if we are continuing execution. KILLED non-zero means we
|
|
have killed the inferior, so we should ignore weird errors due to
|
|
threads shutting down. */
|
|
static BOOL
|
|
windows_continue (DWORD continue_status, int id, int killed)
|
|
{
|
|
windows_thread_info *th;
|
|
BOOL res;
|
|
|
|
DEBUG_EVENTS (("ContinueDebugEvent (cpid=%d, ctid=0x%x, %s);\n",
|
|
(unsigned) current_event.dwProcessId,
|
|
(unsigned) current_event.dwThreadId,
|
|
continue_status == DBG_CONTINUE ?
|
|
"DBG_CONTINUE" : "DBG_EXCEPTION_NOT_HANDLED"));
|
|
|
|
for (th = &thread_head; (th = th->next) != NULL;)
|
|
if ((id == -1 || id == (int) th->id)
|
|
&& th->suspended)
|
|
{
|
|
if (debug_registers_changed)
|
|
{
|
|
th->context.ContextFlags |= CONTEXT_DEBUG_REGISTERS;
|
|
th->context.Dr0 = dr[0];
|
|
th->context.Dr1 = dr[1];
|
|
th->context.Dr2 = dr[2];
|
|
th->context.Dr3 = dr[3];
|
|
th->context.Dr6 = DR6_CLEAR_VALUE;
|
|
th->context.Dr7 = dr[7];
|
|
}
|
|
if (th->context.ContextFlags)
|
|
{
|
|
DWORD ec = 0;
|
|
|
|
if (GetExitCodeThread (th->h, &ec)
|
|
&& ec == STILL_ACTIVE)
|
|
{
|
|
BOOL status = SetThreadContext (th->h, &th->context);
|
|
|
|
if (!killed)
|
|
CHECK (status);
|
|
}
|
|
th->context.ContextFlags = 0;
|
|
}
|
|
if (th->suspended > 0)
|
|
(void) ResumeThread (th->h);
|
|
th->suspended = 0;
|
|
}
|
|
|
|
res = ContinueDebugEvent (current_event.dwProcessId,
|
|
current_event.dwThreadId,
|
|
continue_status);
|
|
|
|
if (!res)
|
|
error (_("Failed to resume program execution"
|
|
" (ContinueDebugEvent failed, error %u)"),
|
|
(unsigned int) GetLastError ());
|
|
|
|
debug_registers_changed = 0;
|
|
return res;
|
|
}
|
|
|
|
/* Called in pathological case where Windows fails to send a
|
|
CREATE_PROCESS_DEBUG_EVENT after an attach. */
|
|
static DWORD
|
|
fake_create_process (void)
|
|
{
|
|
current_process_handle = OpenProcess (PROCESS_ALL_ACCESS, FALSE,
|
|
current_event.dwProcessId);
|
|
if (current_process_handle != NULL)
|
|
open_process_used = 1;
|
|
else
|
|
{
|
|
error (_("OpenProcess call failed, GetLastError = %u"),
|
|
(unsigned) GetLastError ());
|
|
/* We can not debug anything in that case. */
|
|
}
|
|
current_thread
|
|
= windows_add_thread (ptid_t (current_event.dwProcessId, 0,
|
|
current_event.dwThreadId),
|
|
current_event.u.CreateThread.hThread,
|
|
current_event.u.CreateThread.lpThreadLocalBase,
|
|
true /* main_thread_p */);
|
|
return current_event.dwThreadId;
|
|
}
|
|
|
|
void
|
|
windows_nat_target::resume (ptid_t ptid, int step, enum gdb_signal sig)
|
|
{
|
|
windows_thread_info *th;
|
|
DWORD continue_status = DBG_CONTINUE;
|
|
|
|
/* A specific PTID means `step only this thread id'. */
|
|
int resume_all = ptid == minus_one_ptid;
|
|
|
|
/* If we're continuing all threads, it's the current inferior that
|
|
should be handled specially. */
|
|
if (resume_all)
|
|
ptid = inferior_ptid;
|
|
|
|
if (sig != GDB_SIGNAL_0)
|
|
{
|
|
if (current_event.dwDebugEventCode != EXCEPTION_DEBUG_EVENT)
|
|
{
|
|
DEBUG_EXCEPT(("Cannot continue with signal %d here.\n",sig));
|
|
}
|
|
else if (sig == last_sig)
|
|
continue_status = DBG_EXCEPTION_NOT_HANDLED;
|
|
else
|
|
#if 0
|
|
/* This code does not seem to work, because
|
|
the kernel does probably not consider changes in the ExceptionRecord
|
|
structure when passing the exception to the inferior.
|
|
Note that this seems possible in the exception handler itself. */
|
|
{
|
|
for (const xlate_exception &x : xlate)
|
|
if (x.us == sig)
|
|
{
|
|
current_event.u.Exception.ExceptionRecord.ExceptionCode
|
|
= x.them;
|
|
continue_status = DBG_EXCEPTION_NOT_HANDLED;
|
|
break;
|
|
}
|
|
if (continue_status == DBG_CONTINUE)
|
|
{
|
|
DEBUG_EXCEPT(("Cannot continue with signal %d.\n",sig));
|
|
}
|
|
}
|
|
#endif
|
|
DEBUG_EXCEPT(("Can only continue with received signal %d.\n",
|
|
last_sig));
|
|
}
|
|
|
|
last_sig = GDB_SIGNAL_0;
|
|
|
|
DEBUG_EXEC (("gdb: windows_resume (pid=%d, tid=0x%x, step=%d, sig=%d);\n",
|
|
ptid.pid (), (unsigned) ptid.tid (), step, sig));
|
|
|
|
/* Get context for currently selected thread. */
|
|
th = thread_rec (inferior_ptid.tid (), FALSE);
|
|
if (th)
|
|
{
|
|
if (step)
|
|
{
|
|
/* Single step by setting t bit. */
|
|
struct regcache *regcache = get_current_regcache ();
|
|
struct gdbarch *gdbarch = regcache->arch ();
|
|
fetch_registers (regcache, gdbarch_ps_regnum (gdbarch));
|
|
th->context.EFlags |= FLAG_TRACE_BIT;
|
|
}
|
|
|
|
if (th->context.ContextFlags)
|
|
{
|
|
if (debug_registers_changed)
|
|
{
|
|
th->context.Dr0 = dr[0];
|
|
th->context.Dr1 = dr[1];
|
|
th->context.Dr2 = dr[2];
|
|
th->context.Dr3 = dr[3];
|
|
th->context.Dr6 = DR6_CLEAR_VALUE;
|
|
th->context.Dr7 = dr[7];
|
|
}
|
|
CHECK (SetThreadContext (th->h, &th->context));
|
|
th->context.ContextFlags = 0;
|
|
}
|
|
}
|
|
|
|
/* Allow continuing with the same signal that interrupted us.
|
|
Otherwise complain. */
|
|
|
|
if (resume_all)
|
|
windows_continue (continue_status, -1, 0);
|
|
else
|
|
windows_continue (continue_status, ptid.tid (), 0);
|
|
}
|
|
|
|
/* Ctrl-C handler used when the inferior is not run in the same console. The
|
|
handler is in charge of interrupting the inferior using DebugBreakProcess.
|
|
Note that this function is not available prior to Windows XP. In this case
|
|
we emit a warning. */
|
|
static BOOL WINAPI
|
|
ctrl_c_handler (DWORD event_type)
|
|
{
|
|
const int attach_flag = current_inferior ()->attach_flag;
|
|
|
|
/* Only handle Ctrl-C and Ctrl-Break events. Ignore others. */
|
|
if (event_type != CTRL_C_EVENT && event_type != CTRL_BREAK_EVENT)
|
|
return FALSE;
|
|
|
|
/* If the inferior and the debugger share the same console, do nothing as
|
|
the inferior has also received the Ctrl-C event. */
|
|
if (!new_console && !attach_flag)
|
|
return TRUE;
|
|
|
|
if (!DebugBreakProcess (current_process_handle))
|
|
warning (_("Could not interrupt program. "
|
|
"Press Ctrl-c in the program console."));
|
|
|
|
/* Return true to tell that Ctrl-C has been handled. */
|
|
return TRUE;
|
|
}
|
|
|
|
/* Get the next event from the child. Returns a non-zero thread id if the event
|
|
requires handling by WFI (or whatever). */
|
|
|
|
int
|
|
windows_nat_target::get_windows_debug_event (int pid,
|
|
struct target_waitstatus *ourstatus)
|
|
{
|
|
BOOL debug_event;
|
|
DWORD continue_status, event_code;
|
|
windows_thread_info *th;
|
|
static windows_thread_info dummy_thread_info;
|
|
DWORD thread_id = 0;
|
|
|
|
last_sig = GDB_SIGNAL_0;
|
|
|
|
if (!(debug_event = WaitForDebugEvent (¤t_event, 1000)))
|
|
goto out;
|
|
|
|
event_count++;
|
|
continue_status = DBG_CONTINUE;
|
|
|
|
event_code = current_event.dwDebugEventCode;
|
|
ourstatus->kind = TARGET_WAITKIND_SPURIOUS;
|
|
th = NULL;
|
|
have_saved_context = 0;
|
|
|
|
switch (event_code)
|
|
{
|
|
case CREATE_THREAD_DEBUG_EVENT:
|
|
DEBUG_EVENTS (("gdb: kernel event for pid=%u tid=0x%x code=%s)\n",
|
|
(unsigned) current_event.dwProcessId,
|
|
(unsigned) current_event.dwThreadId,
|
|
"CREATE_THREAD_DEBUG_EVENT"));
|
|
if (saw_create != 1)
|
|
{
|
|
inferior *inf = find_inferior_pid (this, current_event.dwProcessId);
|
|
if (!saw_create && inf->attach_flag)
|
|
{
|
|
/* Kludge around a Windows bug where first event is a create
|
|
thread event. Caused when attached process does not have
|
|
a main thread. */
|
|
thread_id = fake_create_process ();
|
|
if (thread_id)
|
|
saw_create++;
|
|
}
|
|
break;
|
|
}
|
|
/* Record the existence of this thread. */
|
|
thread_id = current_event.dwThreadId;
|
|
th = windows_add_thread
|
|
(ptid_t (current_event.dwProcessId, 0, current_event.dwThreadId),
|
|
current_event.u.CreateThread.hThread,
|
|
current_event.u.CreateThread.lpThreadLocalBase,
|
|
false /* main_thread_p */);
|
|
|
|
break;
|
|
|
|
case EXIT_THREAD_DEBUG_EVENT:
|
|
DEBUG_EVENTS (("gdb: kernel event for pid=%u tid=0x%x code=%s)\n",
|
|
(unsigned) current_event.dwProcessId,
|
|
(unsigned) current_event.dwThreadId,
|
|
"EXIT_THREAD_DEBUG_EVENT"));
|
|
windows_delete_thread (ptid_t (current_event.dwProcessId, 0,
|
|
current_event.dwThreadId),
|
|
current_event.u.ExitThread.dwExitCode,
|
|
false /* main_thread_p */);
|
|
th = &dummy_thread_info;
|
|
break;
|
|
|
|
case CREATE_PROCESS_DEBUG_EVENT:
|
|
DEBUG_EVENTS (("gdb: kernel event for pid=%u tid=0x%x code=%s)\n",
|
|
(unsigned) current_event.dwProcessId,
|
|
(unsigned) current_event.dwThreadId,
|
|
"CREATE_PROCESS_DEBUG_EVENT"));
|
|
CloseHandle (current_event.u.CreateProcessInfo.hFile);
|
|
if (++saw_create != 1)
|
|
break;
|
|
|
|
current_process_handle = current_event.u.CreateProcessInfo.hProcess;
|
|
/* Add the main thread. */
|
|
th = windows_add_thread
|
|
(ptid_t (current_event.dwProcessId, 0,
|
|
current_event.dwThreadId),
|
|
current_event.u.CreateProcessInfo.hThread,
|
|
current_event.u.CreateProcessInfo.lpThreadLocalBase,
|
|
true /* main_thread_p */);
|
|
thread_id = current_event.dwThreadId;
|
|
break;
|
|
|
|
case EXIT_PROCESS_DEBUG_EVENT:
|
|
DEBUG_EVENTS (("gdb: kernel event for pid=%u tid=0x%x code=%s)\n",
|
|
(unsigned) current_event.dwProcessId,
|
|
(unsigned) current_event.dwThreadId,
|
|
"EXIT_PROCESS_DEBUG_EVENT"));
|
|
if (!windows_initialization_done)
|
|
{
|
|
target_terminal::ours ();
|
|
target_mourn_inferior (inferior_ptid);
|
|
error (_("During startup program exited with code 0x%x."),
|
|
(unsigned int) current_event.u.ExitProcess.dwExitCode);
|
|
}
|
|
else if (saw_create == 1)
|
|
{
|
|
windows_delete_thread (ptid_t (current_event.dwProcessId, 0,
|
|
current_event.dwThreadId),
|
|
0, true /* main_thread_p */);
|
|
DWORD exit_status = current_event.u.ExitProcess.dwExitCode;
|
|
/* If the exit status looks like a fatal exception, but we
|
|
don't recognize the exception's code, make the original
|
|
exit status value available, to avoid losing
|
|
information. */
|
|
int exit_signal
|
|
= WIFSIGNALED (exit_status) ? WTERMSIG (exit_status) : -1;
|
|
if (exit_signal == -1)
|
|
{
|
|
ourstatus->kind = TARGET_WAITKIND_EXITED;
|
|
ourstatus->value.integer = exit_status;
|
|
}
|
|
else
|
|
{
|
|
ourstatus->kind = TARGET_WAITKIND_SIGNALLED;
|
|
ourstatus->value.sig = gdb_signal_from_host (exit_signal);
|
|
}
|
|
thread_id = current_event.dwThreadId;
|
|
}
|
|
break;
|
|
|
|
case LOAD_DLL_DEBUG_EVENT:
|
|
DEBUG_EVENTS (("gdb: kernel event for pid=%u tid=0x%x code=%s)\n",
|
|
(unsigned) current_event.dwProcessId,
|
|
(unsigned) current_event.dwThreadId,
|
|
"LOAD_DLL_DEBUG_EVENT"));
|
|
CloseHandle (current_event.u.LoadDll.hFile);
|
|
if (saw_create != 1 || ! windows_initialization_done)
|
|
break;
|
|
catch_errors (handle_load_dll);
|
|
ourstatus->kind = TARGET_WAITKIND_LOADED;
|
|
ourstatus->value.integer = 0;
|
|
thread_id = current_event.dwThreadId;
|
|
break;
|
|
|
|
case UNLOAD_DLL_DEBUG_EVENT:
|
|
DEBUG_EVENTS (("gdb: kernel event for pid=%u tid=0x%x code=%s)\n",
|
|
(unsigned) current_event.dwProcessId,
|
|
(unsigned) current_event.dwThreadId,
|
|
"UNLOAD_DLL_DEBUG_EVENT"));
|
|
if (saw_create != 1 || ! windows_initialization_done)
|
|
break;
|
|
catch_errors (handle_unload_dll);
|
|
ourstatus->kind = TARGET_WAITKIND_LOADED;
|
|
ourstatus->value.integer = 0;
|
|
thread_id = current_event.dwThreadId;
|
|
break;
|
|
|
|
case EXCEPTION_DEBUG_EVENT:
|
|
DEBUG_EVENTS (("gdb: kernel event for pid=%u tid=0x%x code=%s)\n",
|
|
(unsigned) current_event.dwProcessId,
|
|
(unsigned) current_event.dwThreadId,
|
|
"EXCEPTION_DEBUG_EVENT"));
|
|
if (saw_create != 1)
|
|
break;
|
|
switch (handle_exception (ourstatus))
|
|
{
|
|
case HANDLE_EXCEPTION_UNHANDLED:
|
|
default:
|
|
continue_status = DBG_EXCEPTION_NOT_HANDLED;
|
|
break;
|
|
case HANDLE_EXCEPTION_HANDLED:
|
|
thread_id = current_event.dwThreadId;
|
|
break;
|
|
case HANDLE_EXCEPTION_IGNORED:
|
|
continue_status = DBG_CONTINUE;
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case OUTPUT_DEBUG_STRING_EVENT: /* Message from the kernel. */
|
|
DEBUG_EVENTS (("gdb: kernel event for pid=%u tid=0x%x code=%s)\n",
|
|
(unsigned) current_event.dwProcessId,
|
|
(unsigned) current_event.dwThreadId,
|
|
"OUTPUT_DEBUG_STRING_EVENT"));
|
|
if (saw_create != 1)
|
|
break;
|
|
thread_id = handle_output_debug_string (ourstatus);
|
|
break;
|
|
|
|
default:
|
|
if (saw_create != 1)
|
|
break;
|
|
printf_unfiltered ("gdb: kernel event for pid=%u tid=0x%x\n",
|
|
(unsigned) current_event.dwProcessId,
|
|
(unsigned) current_event.dwThreadId);
|
|
printf_unfiltered (" unknown event code %u\n",
|
|
(unsigned) current_event.dwDebugEventCode);
|
|
break;
|
|
}
|
|
|
|
if (!thread_id || saw_create != 1)
|
|
{
|
|
CHECK (windows_continue (continue_status, -1, 0));
|
|
}
|
|
else
|
|
{
|
|
inferior_ptid = ptid_t (current_event.dwProcessId, 0, thread_id);
|
|
current_thread = th;
|
|
if (!current_thread)
|
|
current_thread = thread_rec (thread_id, TRUE);
|
|
}
|
|
|
|
out:
|
|
return thread_id;
|
|
}
|
|
|
|
/* Wait for interesting events to occur in the target process. */
|
|
ptid_t
|
|
windows_nat_target::wait (ptid_t ptid, struct target_waitstatus *ourstatus,
|
|
int options)
|
|
{
|
|
int pid = -1;
|
|
|
|
/* We loop when we get a non-standard exception rather than return
|
|
with a SPURIOUS because resume can try and step or modify things,
|
|
which needs a current_thread->h. But some of these exceptions mark
|
|
the birth or death of threads, which mean that the current thread
|
|
isn't necessarily what you think it is. */
|
|
|
|
while (1)
|
|
{
|
|
int retval;
|
|
|
|
/* If the user presses Ctrl-c while the debugger is waiting
|
|
for an event, he expects the debugger to interrupt his program
|
|
and to get the prompt back. There are two possible situations:
|
|
|
|
- The debugger and the program do not share the console, in
|
|
which case the Ctrl-c event only reached the debugger.
|
|
In that case, the ctrl_c handler will take care of interrupting
|
|
the inferior. Note that this case is working starting with
|
|
Windows XP. For Windows 2000, Ctrl-C should be pressed in the
|
|
inferior console.
|
|
|
|
- The debugger and the program share the same console, in which
|
|
case both debugger and inferior will receive the Ctrl-c event.
|
|
In that case the ctrl_c handler will ignore the event, as the
|
|
Ctrl-c event generated inside the inferior will trigger the
|
|
expected debug event.
|
|
|
|
FIXME: brobecker/2008-05-20: If the inferior receives the
|
|
signal first and the delay until GDB receives that signal
|
|
is sufficiently long, GDB can sometimes receive the SIGINT
|
|
after we have unblocked the CTRL+C handler. This would
|
|
lead to the debugger stopping prematurely while handling
|
|
the new-thread event that comes with the handling of the SIGINT
|
|
inside the inferior, and then stop again immediately when
|
|
the user tries to resume the execution in the inferior.
|
|
This is a classic race that we should try to fix one day. */
|
|
SetConsoleCtrlHandler (&ctrl_c_handler, TRUE);
|
|
retval = get_windows_debug_event (pid, ourstatus);
|
|
SetConsoleCtrlHandler (&ctrl_c_handler, FALSE);
|
|
|
|
if (retval)
|
|
return ptid_t (current_event.dwProcessId, 0, retval);
|
|
else
|
|
{
|
|
int detach = 0;
|
|
|
|
if (deprecated_ui_loop_hook != NULL)
|
|
detach = deprecated_ui_loop_hook (0);
|
|
|
|
if (detach)
|
|
kill ();
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Iterate over all DLLs currently mapped by our inferior, and
|
|
add them to our list of solibs. */
|
|
|
|
static void
|
|
windows_add_all_dlls (void)
|
|
{
|
|
HMODULE dummy_hmodule;
|
|
DWORD cb_needed;
|
|
HMODULE *hmodules;
|
|
int i;
|
|
|
|
if (EnumProcessModules (current_process_handle, &dummy_hmodule,
|
|
sizeof (HMODULE), &cb_needed) == 0)
|
|
return;
|
|
|
|
if (cb_needed < 1)
|
|
return;
|
|
|
|
hmodules = (HMODULE *) alloca (cb_needed);
|
|
if (EnumProcessModules (current_process_handle, hmodules,
|
|
cb_needed, &cb_needed) == 0)
|
|
return;
|
|
|
|
for (i = 1; i < (int) (cb_needed / sizeof (HMODULE)); i++)
|
|
{
|
|
MODULEINFO mi;
|
|
#ifdef __USEWIDE
|
|
wchar_t dll_name[__PMAX];
|
|
char name[__PMAX];
|
|
#else
|
|
char dll_name[__PMAX];
|
|
char *name;
|
|
#endif
|
|
if (GetModuleInformation (current_process_handle, hmodules[i],
|
|
&mi, sizeof (mi)) == 0)
|
|
continue;
|
|
if (GetModuleFileNameEx (current_process_handle, hmodules[i],
|
|
dll_name, sizeof (dll_name)) == 0)
|
|
continue;
|
|
#ifdef __USEWIDE
|
|
wcstombs (name, dll_name, __PMAX);
|
|
#else
|
|
name = dll_name;
|
|
#endif
|
|
|
|
solib_end->next = windows_make_so (name, mi.lpBaseOfDll);
|
|
solib_end = solib_end->next;
|
|
}
|
|
}
|
|
|
|
static void
|
|
do_initial_windows_stuff (struct target_ops *ops, DWORD pid, int attaching)
|
|
{
|
|
int i;
|
|
struct inferior *inf;
|
|
|
|
last_sig = GDB_SIGNAL_0;
|
|
event_count = 0;
|
|
exception_count = 0;
|
|
open_process_used = 0;
|
|
debug_registers_changed = 0;
|
|
debug_registers_used = 0;
|
|
for (i = 0; i < sizeof (dr) / sizeof (dr[0]); i++)
|
|
dr[i] = 0;
|
|
#ifdef __CYGWIN__
|
|
cygwin_load_start = cygwin_load_end = 0;
|
|
#endif
|
|
current_event.dwProcessId = pid;
|
|
memset (¤t_event, 0, sizeof (current_event));
|
|
if (!target_is_pushed (ops))
|
|
push_target (ops);
|
|
disable_breakpoints_in_shlibs ();
|
|
windows_clear_solib ();
|
|
clear_proceed_status (0);
|
|
init_wait_for_inferior ();
|
|
|
|
inf = current_inferior ();
|
|
inferior_appeared (inf, pid);
|
|
inf->attach_flag = attaching;
|
|
|
|
/* Make the new process the current inferior, so terminal handling
|
|
can rely on it. When attaching, we don't know about any thread
|
|
id here, but that's OK --- nothing should be referencing the
|
|
current thread until we report an event out of windows_wait. */
|
|
inferior_ptid = ptid_t (pid);
|
|
|
|
target_terminal::init ();
|
|
target_terminal::inferior ();
|
|
|
|
windows_initialization_done = 0;
|
|
|
|
while (1)
|
|
{
|
|
struct target_waitstatus status;
|
|
|
|
ops->wait (minus_one_ptid, &status, 0);
|
|
|
|
/* Note windows_wait returns TARGET_WAITKIND_SPURIOUS for thread
|
|
events. */
|
|
if (status.kind != TARGET_WAITKIND_LOADED
|
|
&& status.kind != TARGET_WAITKIND_SPURIOUS)
|
|
break;
|
|
|
|
ops->resume (minus_one_ptid, 0, GDB_SIGNAL_0);
|
|
}
|
|
|
|
/* Now that the inferior has been started and all DLLs have been mapped,
|
|
we can iterate over all DLLs and load them in.
|
|
|
|
We avoid doing it any earlier because, on certain versions of Windows,
|
|
LOAD_DLL_DEBUG_EVENTs are sometimes not complete. In particular,
|
|
we have seen on Windows 8.1 that the ntdll.dll load event does not
|
|
include the DLL name, preventing us from creating an associated SO.
|
|
A possible explanation is that ntdll.dll might be mapped before
|
|
the SO info gets created by the Windows system -- ntdll.dll is
|
|
the first DLL to be reported via LOAD_DLL_DEBUG_EVENT and other DLLs
|
|
do not seem to suffer from that problem.
|
|
|
|
Rather than try to work around this sort of issue, it is much
|
|
simpler to just ignore DLL load/unload events during the startup
|
|
phase, and then process them all in one batch now. */
|
|
windows_add_all_dlls ();
|
|
|
|
windows_initialization_done = 1;
|
|
return;
|
|
}
|
|
|
|
/* Try to set or remove a user privilege to the current process. Return -1
|
|
if that fails, the previous setting of that privilege otherwise.
|
|
|
|
This code is copied from the Cygwin source code and rearranged to allow
|
|
dynamically loading of the needed symbols from advapi32 which is only
|
|
available on NT/2K/XP. */
|
|
static int
|
|
set_process_privilege (const char *privilege, BOOL enable)
|
|
{
|
|
HANDLE token_hdl = NULL;
|
|
LUID restore_priv;
|
|
TOKEN_PRIVILEGES new_priv, orig_priv;
|
|
int ret = -1;
|
|
DWORD size;
|
|
|
|
if (!OpenProcessToken (GetCurrentProcess (),
|
|
TOKEN_QUERY | TOKEN_ADJUST_PRIVILEGES,
|
|
&token_hdl))
|
|
goto out;
|
|
|
|
if (!LookupPrivilegeValueA (NULL, privilege, &restore_priv))
|
|
goto out;
|
|
|
|
new_priv.PrivilegeCount = 1;
|
|
new_priv.Privileges[0].Luid = restore_priv;
|
|
new_priv.Privileges[0].Attributes = enable ? SE_PRIVILEGE_ENABLED : 0;
|
|
|
|
if (!AdjustTokenPrivileges (token_hdl, FALSE, &new_priv,
|
|
sizeof orig_priv, &orig_priv, &size))
|
|
goto out;
|
|
#if 0
|
|
/* Disabled, otherwise every `attach' in an unprivileged user session
|
|
would raise the "Failed to get SE_DEBUG_NAME privilege" warning in
|
|
windows_attach(). */
|
|
/* AdjustTokenPrivileges returns TRUE even if the privilege could not
|
|
be enabled. GetLastError () returns an correct error code, though. */
|
|
if (enable && GetLastError () == ERROR_NOT_ALL_ASSIGNED)
|
|
goto out;
|
|
#endif
|
|
|
|
ret = orig_priv.Privileges[0].Attributes == SE_PRIVILEGE_ENABLED ? 1 : 0;
|
|
|
|
out:
|
|
if (token_hdl)
|
|
CloseHandle (token_hdl);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/* Attach to process PID, then initialize for debugging it. */
|
|
|
|
void
|
|
windows_nat_target::attach (const char *args, int from_tty)
|
|
{
|
|
BOOL ok;
|
|
DWORD pid;
|
|
|
|
pid = parse_pid_to_attach (args);
|
|
|
|
if (set_process_privilege (SE_DEBUG_NAME, TRUE) < 0)
|
|
{
|
|
printf_unfiltered ("Warning: Failed to get SE_DEBUG_NAME privilege\n");
|
|
printf_unfiltered ("This can cause attach to "
|
|
"fail on Windows NT/2K/XP\n");
|
|
}
|
|
|
|
windows_init_thread_list ();
|
|
ok = DebugActiveProcess (pid);
|
|
saw_create = 0;
|
|
|
|
#ifdef __CYGWIN__
|
|
if (!ok)
|
|
{
|
|
/* Try fall back to Cygwin pid. */
|
|
pid = cygwin_internal (CW_CYGWIN_PID_TO_WINPID, pid);
|
|
|
|
if (pid > 0)
|
|
ok = DebugActiveProcess (pid);
|
|
}
|
|
#endif
|
|
|
|
if (!ok)
|
|
error (_("Can't attach to process %u (error %u)"),
|
|
(unsigned) pid, (unsigned) GetLastError ());
|
|
|
|
DebugSetProcessKillOnExit (FALSE);
|
|
|
|
if (from_tty)
|
|
{
|
|
const char *exec_file = get_exec_file (0);
|
|
|
|
if (exec_file)
|
|
printf_unfiltered ("Attaching to program `%s', %s\n", exec_file,
|
|
target_pid_to_str (ptid_t (pid)).c_str ());
|
|
else
|
|
printf_unfiltered ("Attaching to %s\n",
|
|
target_pid_to_str (ptid_t (pid)).c_str ());
|
|
}
|
|
|
|
do_initial_windows_stuff (this, pid, 1);
|
|
target_terminal::ours ();
|
|
}
|
|
|
|
void
|
|
windows_nat_target::detach (inferior *inf, int from_tty)
|
|
{
|
|
int detached = 1;
|
|
|
|
ptid_t ptid = minus_one_ptid;
|
|
resume (ptid, 0, GDB_SIGNAL_0);
|
|
|
|
if (!DebugActiveProcessStop (current_event.dwProcessId))
|
|
{
|
|
error (_("Can't detach process %u (error %u)"),
|
|
(unsigned) current_event.dwProcessId, (unsigned) GetLastError ());
|
|
detached = 0;
|
|
}
|
|
DebugSetProcessKillOnExit (FALSE);
|
|
|
|
if (detached && from_tty)
|
|
{
|
|
const char *exec_file = get_exec_file (0);
|
|
if (exec_file == 0)
|
|
exec_file = "";
|
|
printf_unfiltered ("Detaching from program: %s, Pid %u\n", exec_file,
|
|
(unsigned) current_event.dwProcessId);
|
|
}
|
|
|
|
x86_cleanup_dregs ();
|
|
inferior_ptid = null_ptid;
|
|
detach_inferior (inf);
|
|
|
|
maybe_unpush_target ();
|
|
}
|
|
|
|
/* Try to determine the executable filename.
|
|
|
|
EXE_NAME_RET is a pointer to a buffer whose size is EXE_NAME_MAX_LEN.
|
|
|
|
Upon success, the filename is stored inside EXE_NAME_RET, and
|
|
this function returns nonzero.
|
|
|
|
Otherwise, this function returns zero and the contents of
|
|
EXE_NAME_RET is undefined. */
|
|
|
|
static int
|
|
windows_get_exec_module_filename (char *exe_name_ret, size_t exe_name_max_len)
|
|
{
|
|
DWORD len;
|
|
HMODULE dh_buf;
|
|
DWORD cbNeeded;
|
|
|
|
cbNeeded = 0;
|
|
if (!EnumProcessModules (current_process_handle, &dh_buf,
|
|
sizeof (HMODULE), &cbNeeded) || !cbNeeded)
|
|
return 0;
|
|
|
|
/* We know the executable is always first in the list of modules,
|
|
which we just fetched. So no need to fetch more. */
|
|
|
|
#ifdef __CYGWIN__
|
|
{
|
|
/* Cygwin prefers that the path be in /x/y/z format, so extract
|
|
the filename into a temporary buffer first, and then convert it
|
|
to POSIX format into the destination buffer. */
|
|
cygwin_buf_t *pathbuf = (cygwin_buf_t *) alloca (exe_name_max_len * sizeof (cygwin_buf_t));
|
|
|
|
len = GetModuleFileNameEx (current_process_handle,
|
|
dh_buf, pathbuf, exe_name_max_len);
|
|
if (len == 0)
|
|
error (_("Error getting executable filename: %u."),
|
|
(unsigned) GetLastError ());
|
|
if (cygwin_conv_path (CCP_WIN_W_TO_POSIX, pathbuf, exe_name_ret,
|
|
exe_name_max_len) < 0)
|
|
error (_("Error converting executable filename to POSIX: %d."), errno);
|
|
}
|
|
#else
|
|
len = GetModuleFileNameEx (current_process_handle,
|
|
dh_buf, exe_name_ret, exe_name_max_len);
|
|
if (len == 0)
|
|
error (_("Error getting executable filename: %u."),
|
|
(unsigned) GetLastError ());
|
|
#endif
|
|
|
|
return 1; /* success */
|
|
}
|
|
|
|
/* The pid_to_exec_file target_ops method for this platform. */
|
|
|
|
char *
|
|
windows_nat_target::pid_to_exec_file (int pid)
|
|
{
|
|
static char path[__PMAX];
|
|
#ifdef __CYGWIN__
|
|
/* Try to find exe name as symlink target of /proc/<pid>/exe. */
|
|
int nchars;
|
|
char procexe[sizeof ("/proc/4294967295/exe")];
|
|
|
|
xsnprintf (procexe, sizeof (procexe), "/proc/%u/exe", pid);
|
|
nchars = readlink (procexe, path, sizeof(path));
|
|
if (nchars > 0 && nchars < sizeof (path))
|
|
{
|
|
path[nchars] = '\0'; /* Got it */
|
|
return path;
|
|
}
|
|
#endif
|
|
|
|
/* If we get here then either Cygwin is hosed, this isn't a Cygwin version
|
|
of gdb, or we're trying to debug a non-Cygwin windows executable. */
|
|
if (!windows_get_exec_module_filename (path, sizeof (path)))
|
|
path[0] = '\0';
|
|
|
|
return path;
|
|
}
|
|
|
|
/* Print status information about what we're accessing. */
|
|
|
|
void
|
|
windows_nat_target::files_info ()
|
|
{
|
|
struct inferior *inf = current_inferior ();
|
|
|
|
printf_unfiltered ("\tUsing the running image of %s %s.\n",
|
|
inf->attach_flag ? "attached" : "child",
|
|
target_pid_to_str (inferior_ptid).c_str ());
|
|
}
|
|
|
|
/* Modify CreateProcess parameters for use of a new separate console.
|
|
Parameters are:
|
|
*FLAGS: DWORD parameter for general process creation flags.
|
|
*SI: STARTUPINFO structure, for which the console window size and
|
|
console buffer size is filled in if GDB is running in a console.
|
|
to create the new console.
|
|
The size of the used font is not available on all versions of
|
|
Windows OS. Furthermore, the current font might not be the default
|
|
font, but this is still better than before.
|
|
If the windows and buffer sizes are computed,
|
|
SI->DWFLAGS is changed so that this information is used
|
|
by CreateProcess function. */
|
|
|
|
static void
|
|
windows_set_console_info (STARTUPINFO *si, DWORD *flags)
|
|
{
|
|
HANDLE hconsole = CreateFile ("CONOUT$", GENERIC_READ | GENERIC_WRITE,
|
|
FILE_SHARE_READ, NULL, OPEN_EXISTING, 0, 0);
|
|
|
|
if (hconsole != INVALID_HANDLE_VALUE)
|
|
{
|
|
CONSOLE_SCREEN_BUFFER_INFO sbinfo;
|
|
COORD font_size;
|
|
CONSOLE_FONT_INFO cfi;
|
|
|
|
GetCurrentConsoleFont (hconsole, FALSE, &cfi);
|
|
font_size = GetConsoleFontSize (hconsole, cfi.nFont);
|
|
GetConsoleScreenBufferInfo(hconsole, &sbinfo);
|
|
si->dwXSize = sbinfo.srWindow.Right - sbinfo.srWindow.Left + 1;
|
|
si->dwYSize = sbinfo.srWindow.Bottom - sbinfo.srWindow.Top + 1;
|
|
if (font_size.X)
|
|
si->dwXSize *= font_size.X;
|
|
else
|
|
si->dwXSize *= 8;
|
|
if (font_size.Y)
|
|
si->dwYSize *= font_size.Y;
|
|
else
|
|
si->dwYSize *= 12;
|
|
si->dwXCountChars = sbinfo.dwSize.X;
|
|
si->dwYCountChars = sbinfo.dwSize.Y;
|
|
si->dwFlags |= STARTF_USESIZE | STARTF_USECOUNTCHARS;
|
|
}
|
|
*flags |= CREATE_NEW_CONSOLE;
|
|
}
|
|
|
|
#ifndef __CYGWIN__
|
|
/* Function called by qsort to sort environment strings. */
|
|
|
|
static int
|
|
envvar_cmp (const void *a, const void *b)
|
|
{
|
|
const char **p = (const char **) a;
|
|
const char **q = (const char **) b;
|
|
return strcasecmp (*p, *q);
|
|
}
|
|
#endif
|
|
|
|
#ifdef __CYGWIN__
|
|
static void
|
|
clear_win32_environment (char **env)
|
|
{
|
|
int i;
|
|
size_t len;
|
|
wchar_t *copy = NULL, *equalpos;
|
|
|
|
for (i = 0; env[i] && *env[i]; i++)
|
|
{
|
|
len = mbstowcs (NULL, env[i], 0) + 1;
|
|
copy = (wchar_t *) xrealloc (copy, len * sizeof (wchar_t));
|
|
mbstowcs (copy, env[i], len);
|
|
equalpos = wcschr (copy, L'=');
|
|
if (equalpos)
|
|
*equalpos = L'\0';
|
|
SetEnvironmentVariableW (copy, NULL);
|
|
}
|
|
xfree (copy);
|
|
}
|
|
#endif
|
|
|
|
#ifndef __CYGWIN__
|
|
|
|
/* Redirection of inferior I/O streams for native MS-Windows programs.
|
|
Unlike on Unix, where this is handled by invoking the inferior via
|
|
the shell, on MS-Windows we need to emulate the cmd.exe shell.
|
|
|
|
The official documentation of the cmd.exe redirection features is here:
|
|
|
|
http://www.microsoft.com/resources/documentation/windows/xp/all/proddocs/en-us/redirection.mspx
|
|
|
|
(That page talks about Windows XP, but there's no newer
|
|
documentation, so we assume later versions of cmd.exe didn't change
|
|
anything.)
|
|
|
|
Caveat: the documentation on that page seems to include a few lies.
|
|
For example, it describes strange constructs 1<&2 and 2<&1, which
|
|
seem to work only when 1>&2 resp. 2>&1 would make sense, and so I
|
|
think the cmd.exe parser of the redirection symbols simply doesn't
|
|
care about the < vs > distinction in these cases. Therefore, the
|
|
supported features are explicitly documented below.
|
|
|
|
The emulation below aims at supporting all the valid use cases
|
|
supported by cmd.exe, which include:
|
|
|
|
< FILE redirect standard input from FILE
|
|
0< FILE redirect standard input from FILE
|
|
<&N redirect standard input from file descriptor N
|
|
0<&N redirect standard input from file descriptor N
|
|
> FILE redirect standard output to FILE
|
|
>> FILE append standard output to FILE
|
|
1>> FILE append standard output to FILE
|
|
>&N redirect standard output to file descriptor N
|
|
1>&N redirect standard output to file descriptor N
|
|
>>&N append standard output to file descriptor N
|
|
1>>&N append standard output to file descriptor N
|
|
2> FILE redirect standard error to FILE
|
|
2>> FILE append standard error to FILE
|
|
2>&N redirect standard error to file descriptor N
|
|
2>>&N append standard error to file descriptor N
|
|
|
|
Note that using N > 2 in the above construct is supported, but
|
|
requires that the corresponding file descriptor be open by some
|
|
means elsewhere or outside GDB. Also note that using ">&0" or
|
|
"<&2" will generally fail, because the file descriptor redirected
|
|
from is normally open in an incompatible mode (e.g., FD 0 is open
|
|
for reading only). IOW, use of such tricks is not recommended;
|
|
you are on your own.
|
|
|
|
We do NOT support redirection of file descriptors above 2, as in
|
|
"3>SOME-FILE", because MinGW compiled programs don't (supporting
|
|
that needs special handling in the startup code that MinGW
|
|
doesn't have). Pipes are also not supported.
|
|
|
|
As for invalid use cases, where the redirection contains some
|
|
error, the emulation below will detect that and produce some
|
|
error and/or failure. But the behavior in those cases is not
|
|
bug-for-bug compatible with what cmd.exe does in those cases.
|
|
That's because what cmd.exe does then is not well defined, and
|
|
seems to be a side effect of the cmd.exe parsing of the command
|
|
line more than anything else. For example, try redirecting to an
|
|
invalid file name, as in "> foo:bar".
|
|
|
|
There are also minor syntactic deviations from what cmd.exe does
|
|
in some corner cases. For example, it doesn't support the likes
|
|
of "> &foo" to mean redirect to file named literally "&foo"; we
|
|
do support that here, because that, too, sounds like some issue
|
|
with the cmd.exe parser. Another nicety is that we support
|
|
redirection targets that use file names with forward slashes,
|
|
something cmd.exe doesn't -- this comes in handy since GDB
|
|
file-name completion can be used when typing the command line for
|
|
the inferior. */
|
|
|
|
/* Support routines for redirecting standard handles of the inferior. */
|
|
|
|
/* Parse a single redirection spec, open/duplicate the specified
|
|
file/fd, and assign the appropriate value to one of the 3 standard
|
|
file descriptors. */
|
|
static int
|
|
redir_open (const char *redir_string, int *inp, int *out, int *err)
|
|
{
|
|
int *fd, ref_fd = -2;
|
|
int mode;
|
|
const char *fname = redir_string + 1;
|
|
int rc = *redir_string;
|
|
|
|
switch (rc)
|
|
{
|
|
case '0':
|
|
fname++;
|
|
/* FALLTHROUGH */
|
|
case '<':
|
|
fd = inp;
|
|
mode = O_RDONLY;
|
|
break;
|
|
case '1': case '2':
|
|
fname++;
|
|
/* FALLTHROUGH */
|
|
case '>':
|
|
fd = (rc == '2') ? err : out;
|
|
mode = O_WRONLY | O_CREAT;
|
|
if (*fname == '>')
|
|
{
|
|
fname++;
|
|
mode |= O_APPEND;
|
|
}
|
|
else
|
|
mode |= O_TRUNC;
|
|
break;
|
|
default:
|
|
return -1;
|
|
}
|
|
|
|
if (*fname == '&' && '0' <= fname[1] && fname[1] <= '9')
|
|
{
|
|
/* A reference to a file descriptor. */
|
|
char *fdtail;
|
|
ref_fd = (int) strtol (fname + 1, &fdtail, 10);
|
|
if (fdtail > fname + 1 && *fdtail == '\0')
|
|
{
|
|
/* Don't allow redirection when open modes are incompatible. */
|
|
if ((ref_fd == 0 && (fd == out || fd == err))
|
|
|| ((ref_fd == 1 || ref_fd == 2) && fd == inp))
|
|
{
|
|
errno = EPERM;
|
|
return -1;
|
|
}
|
|
if (ref_fd == 0)
|
|
ref_fd = *inp;
|
|
else if (ref_fd == 1)
|
|
ref_fd = *out;
|
|
else if (ref_fd == 2)
|
|
ref_fd = *err;
|
|
}
|
|
else
|
|
{
|
|
errno = EBADF;
|
|
return -1;
|
|
}
|
|
}
|
|
else
|
|
fname++; /* skip the separator space */
|
|
/* If the descriptor is already open, close it. This allows
|
|
multiple specs of redirections for the same stream, which is
|
|
somewhat nonsensical, but still valid and supported by cmd.exe.
|
|
(But cmd.exe only opens a single file in this case, the one
|
|
specified by the last redirection spec on the command line.) */
|
|
if (*fd >= 0)
|
|
_close (*fd);
|
|
if (ref_fd == -2)
|
|
{
|
|
*fd = _open (fname, mode, _S_IREAD | _S_IWRITE);
|
|
if (*fd < 0)
|
|
return -1;
|
|
}
|
|
else if (ref_fd == -1)
|
|
*fd = -1; /* reset to default destination */
|
|
else
|
|
{
|
|
*fd = _dup (ref_fd);
|
|
if (*fd < 0)
|
|
return -1;
|
|
}
|
|
/* _open just sets a flag for O_APPEND, which won't be passed to the
|
|
inferior, so we need to actually move the file pointer. */
|
|
if ((mode & O_APPEND) != 0)
|
|
_lseek (*fd, 0L, SEEK_END);
|
|
return 0;
|
|
}
|
|
|
|
/* Canonicalize a single redirection spec and set up the corresponding
|
|
file descriptor as specified. */
|
|
static int
|
|
redir_set_redirection (const char *s, int *inp, int *out, int *err)
|
|
{
|
|
char buf[__PMAX + 2 + 5]; /* extra space for quotes & redirection string */
|
|
char *d = buf;
|
|
const char *start = s;
|
|
int quote = 0;
|
|
|
|
*d++ = *s++; /* copy the 1st character, < or > or a digit */
|
|
if ((*start == '>' || *start == '1' || *start == '2')
|
|
&& *s == '>')
|
|
{
|
|
*d++ = *s++;
|
|
if (*s == '>' && *start != '>')
|
|
*d++ = *s++;
|
|
}
|
|
else if (*start == '0' && *s == '<')
|
|
*d++ = *s++;
|
|
/* cmd.exe recognizes "&N" only immediately after the redirection symbol. */
|
|
if (*s != '&')
|
|
{
|
|
while (isspace (*s)) /* skip whitespace before file name */
|
|
s++;
|
|
*d++ = ' '; /* separate file name with a single space */
|
|
}
|
|
|
|
/* Copy the file name. */
|
|
while (*s)
|
|
{
|
|
/* Remove quoting characters from the file name in buf[]. */
|
|
if (*s == '"') /* could support '..' quoting here */
|
|
{
|
|
if (!quote)
|
|
quote = *s++;
|
|
else if (*s == quote)
|
|
{
|
|
quote = 0;
|
|
s++;
|
|
}
|
|
else
|
|
*d++ = *s++;
|
|
}
|
|
else if (*s == '\\')
|
|
{
|
|
if (s[1] == '"') /* could support '..' here */
|
|
s++;
|
|
*d++ = *s++;
|
|
}
|
|
else if (isspace (*s) && !quote)
|
|
break;
|
|
else
|
|
*d++ = *s++;
|
|
if (d - buf >= sizeof (buf) - 1)
|
|
{
|
|
errno = ENAMETOOLONG;
|
|
return 0;
|
|
}
|
|
}
|
|
*d = '\0';
|
|
|
|
/* Windows doesn't allow redirection characters in file names, so we
|
|
can bail out early if they use them, or if there's no target file
|
|
name after the redirection symbol. */
|
|
if (d[-1] == '>' || d[-1] == '<')
|
|
{
|
|
errno = ENOENT;
|
|
return 0;
|
|
}
|
|
if (redir_open (buf, inp, out, err) == 0)
|
|
return s - start;
|
|
return 0;
|
|
}
|
|
|
|
/* Parse the command line for redirection specs and prepare the file
|
|
descriptors for the 3 standard streams accordingly. */
|
|
static bool
|
|
redirect_inferior_handles (const char *cmd_orig, char *cmd,
|
|
int *inp, int *out, int *err)
|
|
{
|
|
const char *s = cmd_orig;
|
|
char *d = cmd;
|
|
int quote = 0;
|
|
bool retval = false;
|
|
|
|
while (isspace (*s))
|
|
*d++ = *s++;
|
|
|
|
while (*s)
|
|
{
|
|
if (*s == '"') /* could also support '..' quoting here */
|
|
{
|
|
if (!quote)
|
|
quote = *s;
|
|
else if (*s == quote)
|
|
quote = 0;
|
|
}
|
|
else if (*s == '\\')
|
|
{
|
|
if (s[1] == '"') /* escaped quote char */
|
|
s++;
|
|
}
|
|
else if (!quote)
|
|
{
|
|
/* Process a single redirection candidate. */
|
|
if (*s == '<' || *s == '>'
|
|
|| ((*s == '1' || *s == '2') && s[1] == '>')
|
|
|| (*s == '0' && s[1] == '<'))
|
|
{
|
|
int skip = redir_set_redirection (s, inp, out, err);
|
|
|
|
if (skip <= 0)
|
|
return false;
|
|
retval = true;
|
|
s += skip;
|
|
}
|
|
}
|
|
if (*s)
|
|
*d++ = *s++;
|
|
}
|
|
*d = '\0';
|
|
return retval;
|
|
}
|
|
#endif /* !__CYGWIN__ */
|
|
|
|
/* Start an inferior windows child process and sets inferior_ptid to its pid.
|
|
EXEC_FILE is the file to run.
|
|
ALLARGS is a string containing the arguments to the program.
|
|
ENV is the environment vector to pass. Errors reported with error(). */
|
|
|
|
void
|
|
windows_nat_target::create_inferior (const char *exec_file,
|
|
const std::string &origallargs,
|
|
char **in_env, int from_tty)
|
|
{
|
|
STARTUPINFO si;
|
|
#ifdef __CYGWIN__
|
|
cygwin_buf_t real_path[__PMAX];
|
|
cygwin_buf_t shell[__PMAX]; /* Path to shell */
|
|
cygwin_buf_t infcwd[__PMAX];
|
|
const char *sh;
|
|
cygwin_buf_t *toexec;
|
|
cygwin_buf_t *cygallargs;
|
|
cygwin_buf_t *args;
|
|
char **old_env = NULL;
|
|
PWCHAR w32_env;
|
|
size_t len;
|
|
int tty;
|
|
int ostdin, ostdout, ostderr;
|
|
#else /* !__CYGWIN__ */
|
|
char shell[__PMAX]; /* Path to shell */
|
|
const char *toexec;
|
|
char *args, *allargs_copy;
|
|
size_t args_len, allargs_len;
|
|
int fd_inp = -1, fd_out = -1, fd_err = -1;
|
|
HANDLE tty = INVALID_HANDLE_VALUE;
|
|
bool redirected = false;
|
|
char *w32env;
|
|
char *temp;
|
|
size_t envlen;
|
|
int i;
|
|
size_t envsize;
|
|
char **env;
|
|
#endif /* !__CYGWIN__ */
|
|
const char *allargs = origallargs.c_str ();
|
|
PROCESS_INFORMATION pi;
|
|
BOOL ret;
|
|
DWORD flags = 0;
|
|
const char *inferior_io_terminal = get_inferior_io_terminal ();
|
|
|
|
if (!exec_file)
|
|
error (_("No executable specified, use `target exec'."));
|
|
|
|
const char *inferior_cwd = get_inferior_cwd ();
|
|
std::string expanded_infcwd;
|
|
if (inferior_cwd != NULL)
|
|
{
|
|
expanded_infcwd = gdb_tilde_expand (inferior_cwd);
|
|
/* Mirror slashes on inferior's cwd. */
|
|
std::replace (expanded_infcwd.begin (), expanded_infcwd.end (),
|
|
'/', '\\');
|
|
inferior_cwd = expanded_infcwd.c_str ();
|
|
}
|
|
|
|
memset (&si, 0, sizeof (si));
|
|
si.cb = sizeof (si);
|
|
|
|
if (new_group)
|
|
flags |= CREATE_NEW_PROCESS_GROUP;
|
|
|
|
if (new_console)
|
|
windows_set_console_info (&si, &flags);
|
|
|
|
#ifdef __CYGWIN__
|
|
if (!useshell)
|
|
{
|
|
flags |= DEBUG_ONLY_THIS_PROCESS;
|
|
if (cygwin_conv_path (CCP_POSIX_TO_WIN_W, exec_file, real_path,
|
|
__PMAX * sizeof (cygwin_buf_t)) < 0)
|
|
error (_("Error starting executable: %d"), errno);
|
|
toexec = real_path;
|
|
#ifdef __USEWIDE
|
|
len = mbstowcs (NULL, allargs, 0) + 1;
|
|
if (len == (size_t) -1)
|
|
error (_("Error starting executable: %d"), errno);
|
|
cygallargs = (wchar_t *) alloca (len * sizeof (wchar_t));
|
|
mbstowcs (cygallargs, allargs, len);
|
|
#else /* !__USEWIDE */
|
|
cygallargs = allargs;
|
|
#endif
|
|
}
|
|
else
|
|
{
|
|
sh = get_shell ();
|
|
if (cygwin_conv_path (CCP_POSIX_TO_WIN_W, sh, shell, __PMAX) < 0)
|
|
error (_("Error starting executable via shell: %d"), errno);
|
|
#ifdef __USEWIDE
|
|
len = sizeof (L" -c 'exec '") + mbstowcs (NULL, exec_file, 0)
|
|
+ mbstowcs (NULL, allargs, 0) + 2;
|
|
cygallargs = (wchar_t *) alloca (len * sizeof (wchar_t));
|
|
swprintf (cygallargs, len, L" -c 'exec %s %s'", exec_file, allargs);
|
|
#else /* !__USEWIDE */
|
|
len = (sizeof (" -c 'exec '") + strlen (exec_file)
|
|
+ strlen (allargs) + 2);
|
|
cygallargs = (char *) alloca (len);
|
|
xsnprintf (cygallargs, len, " -c 'exec %s %s'", exec_file, allargs);
|
|
#endif /* __USEWIDE */
|
|
toexec = shell;
|
|
flags |= DEBUG_PROCESS;
|
|
}
|
|
|
|
if (inferior_cwd != NULL
|
|
&& cygwin_conv_path (CCP_POSIX_TO_WIN_W, inferior_cwd,
|
|
infcwd, strlen (inferior_cwd)) < 0)
|
|
error (_("Error converting inferior cwd: %d"), errno);
|
|
|
|
#ifdef __USEWIDE
|
|
args = (cygwin_buf_t *) alloca ((wcslen (toexec) + wcslen (cygallargs) + 2)
|
|
* sizeof (wchar_t));
|
|
wcscpy (args, toexec);
|
|
wcscat (args, L" ");
|
|
wcscat (args, cygallargs);
|
|
#else /* !__USEWIDE */
|
|
args = (cygwin_buf_t *) alloca (strlen (toexec) + strlen (cygallargs) + 2);
|
|
strcpy (args, toexec);
|
|
strcat (args, " ");
|
|
strcat (args, cygallargs);
|
|
#endif /* !__USEWIDE */
|
|
|
|
#ifdef CW_CVT_ENV_TO_WINENV
|
|
/* First try to create a direct Win32 copy of the POSIX environment. */
|
|
w32_env = (PWCHAR) cygwin_internal (CW_CVT_ENV_TO_WINENV, in_env);
|
|
if (w32_env != (PWCHAR) -1)
|
|
flags |= CREATE_UNICODE_ENVIRONMENT;
|
|
else
|
|
/* If that fails, fall back to old method tweaking GDB's environment. */
|
|
#endif /* CW_CVT_ENV_TO_WINENV */
|
|
{
|
|
/* Reset all Win32 environment variables to avoid leftover on next run. */
|
|
clear_win32_environment (environ);
|
|
/* Prepare the environment vars for CreateProcess. */
|
|
old_env = environ;
|
|
environ = in_env;
|
|
cygwin_internal (CW_SYNC_WINENV);
|
|
w32_env = NULL;
|
|
}
|
|
|
|
if (!inferior_io_terminal)
|
|
tty = ostdin = ostdout = ostderr = -1;
|
|
else
|
|
{
|
|
tty = open (inferior_io_terminal, O_RDWR | O_NOCTTY);
|
|
if (tty < 0)
|
|
{
|
|
print_sys_errmsg (inferior_io_terminal, errno);
|
|
ostdin = ostdout = ostderr = -1;
|
|
}
|
|
else
|
|
{
|
|
ostdin = dup (0);
|
|
ostdout = dup (1);
|
|
ostderr = dup (2);
|
|
dup2 (tty, 0);
|
|
dup2 (tty, 1);
|
|
dup2 (tty, 2);
|
|
}
|
|
}
|
|
|
|
windows_init_thread_list ();
|
|
ret = CreateProcess (0,
|
|
args, /* command line */
|
|
NULL, /* Security */
|
|
NULL, /* thread */
|
|
TRUE, /* inherit handles */
|
|
flags, /* start flags */
|
|
w32_env, /* environment */
|
|
inferior_cwd != NULL ? infcwd : NULL, /* current
|
|
directory */
|
|
&si,
|
|
&pi);
|
|
if (w32_env)
|
|
/* Just free the Win32 environment, if it could be created. */
|
|
free (w32_env);
|
|
else
|
|
{
|
|
/* Reset all environment variables to avoid leftover on next run. */
|
|
clear_win32_environment (in_env);
|
|
/* Restore normal GDB environment variables. */
|
|
environ = old_env;
|
|
cygwin_internal (CW_SYNC_WINENV);
|
|
}
|
|
|
|
if (tty >= 0)
|
|
{
|
|
::close (tty);
|
|
dup2 (ostdin, 0);
|
|
dup2 (ostdout, 1);
|
|
dup2 (ostderr, 2);
|
|
::close (ostdin);
|
|
::close (ostdout);
|
|
::close (ostderr);
|
|
}
|
|
#else /* !__CYGWIN__ */
|
|
allargs_len = strlen (allargs);
|
|
allargs_copy = strcpy ((char *) alloca (allargs_len + 1), allargs);
|
|
if (strpbrk (allargs_copy, "<>") != NULL)
|
|
{
|
|
int e = errno;
|
|
errno = 0;
|
|
redirected =
|
|
redirect_inferior_handles (allargs, allargs_copy,
|
|
&fd_inp, &fd_out, &fd_err);
|
|
if (errno)
|
|
warning (_("Error in redirection: %s."), safe_strerror (errno));
|
|
else
|
|
errno = e;
|
|
allargs_len = strlen (allargs_copy);
|
|
}
|
|
/* If not all the standard streams are redirected by the command
|
|
line, use inferior_io_terminal for those which aren't. */
|
|
if (inferior_io_terminal
|
|
&& !(fd_inp >= 0 && fd_out >= 0 && fd_err >= 0))
|
|
{
|
|
SECURITY_ATTRIBUTES sa;
|
|
sa.nLength = sizeof(sa);
|
|
sa.lpSecurityDescriptor = 0;
|
|
sa.bInheritHandle = TRUE;
|
|
tty = CreateFileA (inferior_io_terminal, GENERIC_READ | GENERIC_WRITE,
|
|
0, &sa, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0);
|
|
if (tty == INVALID_HANDLE_VALUE)
|
|
warning (_("Warning: Failed to open TTY %s, error %#x."),
|
|
inferior_io_terminal, (unsigned) GetLastError ());
|
|
}
|
|
if (redirected || tty != INVALID_HANDLE_VALUE)
|
|
{
|
|
if (fd_inp >= 0)
|
|
si.hStdInput = (HANDLE) _get_osfhandle (fd_inp);
|
|
else if (tty != INVALID_HANDLE_VALUE)
|
|
si.hStdInput = tty;
|
|
else
|
|
si.hStdInput = GetStdHandle (STD_INPUT_HANDLE);
|
|
if (fd_out >= 0)
|
|
si.hStdOutput = (HANDLE) _get_osfhandle (fd_out);
|
|
else if (tty != INVALID_HANDLE_VALUE)
|
|
si.hStdOutput = tty;
|
|
else
|
|
si.hStdOutput = GetStdHandle (STD_OUTPUT_HANDLE);
|
|
if (fd_err >= 0)
|
|
si.hStdError = (HANDLE) _get_osfhandle (fd_err);
|
|
else if (tty != INVALID_HANDLE_VALUE)
|
|
si.hStdError = tty;
|
|
else
|
|
si.hStdError = GetStdHandle (STD_ERROR_HANDLE);
|
|
si.dwFlags |= STARTF_USESTDHANDLES;
|
|
}
|
|
|
|
toexec = exec_file;
|
|
/* Build the command line, a space-separated list of tokens where
|
|
the first token is the name of the module to be executed.
|
|
To avoid ambiguities introduced by spaces in the module name,
|
|
we quote it. */
|
|
args_len = strlen (toexec) + 2 /* quotes */ + allargs_len + 2;
|
|
args = (char *) alloca (args_len);
|
|
xsnprintf (args, args_len, "\"%s\" %s", toexec, allargs_copy);
|
|
|
|
flags |= DEBUG_ONLY_THIS_PROCESS;
|
|
|
|
/* CreateProcess takes the environment list as a null terminated set of
|
|
strings (i.e. two nulls terminate the list). */
|
|
|
|
/* Get total size for env strings. */
|
|
for (envlen = 0, i = 0; in_env[i] && *in_env[i]; i++)
|
|
envlen += strlen (in_env[i]) + 1;
|
|
|
|
envsize = sizeof (in_env[0]) * (i + 1);
|
|
env = (char **) alloca (envsize);
|
|
memcpy (env, in_env, envsize);
|
|
/* Windows programs expect the environment block to be sorted. */
|
|
qsort (env, i, sizeof (char *), envvar_cmp);
|
|
|
|
w32env = (char *) alloca (envlen + 1);
|
|
|
|
/* Copy env strings into new buffer. */
|
|
for (temp = w32env, i = 0; env[i] && *env[i]; i++)
|
|
{
|
|
strcpy (temp, env[i]);
|
|
temp += strlen (temp) + 1;
|
|
}
|
|
|
|
/* Final nil string to terminate new env. */
|
|
*temp = 0;
|
|
|
|
windows_init_thread_list ();
|
|
ret = CreateProcessA (0,
|
|
args, /* command line */
|
|
NULL, /* Security */
|
|
NULL, /* thread */
|
|
TRUE, /* inherit handles */
|
|
flags, /* start flags */
|
|
w32env, /* environment */
|
|
inferior_cwd, /* current directory */
|
|
&si,
|
|
&pi);
|
|
if (tty != INVALID_HANDLE_VALUE)
|
|
CloseHandle (tty);
|
|
if (fd_inp >= 0)
|
|
_close (fd_inp);
|
|
if (fd_out >= 0)
|
|
_close (fd_out);
|
|
if (fd_err >= 0)
|
|
_close (fd_err);
|
|
#endif /* !__CYGWIN__ */
|
|
|
|
if (!ret)
|
|
error (_("Error creating process %s, (error %u)."),
|
|
exec_file, (unsigned) GetLastError ());
|
|
|
|
CloseHandle (pi.hThread);
|
|
CloseHandle (pi.hProcess);
|
|
|
|
if (useshell && shell[0] != '\0')
|
|
saw_create = -1;
|
|
else
|
|
saw_create = 0;
|
|
|
|
do_initial_windows_stuff (this, pi.dwProcessId, 0);
|
|
|
|
/* windows_continue (DBG_CONTINUE, -1, 0); */
|
|
}
|
|
|
|
void
|
|
windows_nat_target::mourn_inferior ()
|
|
{
|
|
(void) windows_continue (DBG_CONTINUE, -1, 0);
|
|
x86_cleanup_dregs();
|
|
if (open_process_used)
|
|
{
|
|
CHECK (CloseHandle (current_process_handle));
|
|
open_process_used = 0;
|
|
}
|
|
inf_child_target::mourn_inferior ();
|
|
}
|
|
|
|
/* Send a SIGINT to the process group. This acts just like the user typed a
|
|
^C on the controlling terminal. */
|
|
|
|
void
|
|
windows_nat_target::interrupt ()
|
|
{
|
|
DEBUG_EVENTS (("gdb: GenerateConsoleCtrlEvent (CTRLC_EVENT, 0)\n"));
|
|
CHECK (GenerateConsoleCtrlEvent (CTRL_C_EVENT, current_event.dwProcessId));
|
|
registers_changed (); /* refresh register state */
|
|
}
|
|
|
|
/* Helper for windows_xfer_partial that handles memory transfers.
|
|
Arguments are like target_xfer_partial. */
|
|
|
|
static enum target_xfer_status
|
|
windows_xfer_memory (gdb_byte *readbuf, const gdb_byte *writebuf,
|
|
ULONGEST memaddr, ULONGEST len, ULONGEST *xfered_len)
|
|
{
|
|
SIZE_T done = 0;
|
|
BOOL success;
|
|
DWORD lasterror = 0;
|
|
|
|
if (writebuf != NULL)
|
|
{
|
|
DEBUG_MEM (("gdb: write target memory, %s bytes at %s\n",
|
|
pulongest (len), core_addr_to_string (memaddr)));
|
|
success = WriteProcessMemory (current_process_handle,
|
|
(LPVOID) (uintptr_t) memaddr, writebuf,
|
|
len, &done);
|
|
if (!success)
|
|
lasterror = GetLastError ();
|
|
FlushInstructionCache (current_process_handle,
|
|
(LPCVOID) (uintptr_t) memaddr, len);
|
|
}
|
|
else
|
|
{
|
|
DEBUG_MEM (("gdb: read target memory, %s bytes at %s\n",
|
|
pulongest (len), core_addr_to_string (memaddr)));
|
|
success = ReadProcessMemory (current_process_handle,
|
|
(LPCVOID) (uintptr_t) memaddr, readbuf,
|
|
len, &done);
|
|
if (!success)
|
|
lasterror = GetLastError ();
|
|
}
|
|
*xfered_len = (ULONGEST) done;
|
|
if (!success && lasterror == ERROR_PARTIAL_COPY && done > 0)
|
|
return TARGET_XFER_OK;
|
|
else
|
|
return success ? TARGET_XFER_OK : TARGET_XFER_E_IO;
|
|
}
|
|
|
|
void
|
|
windows_nat_target::kill ()
|
|
{
|
|
CHECK (TerminateProcess (current_process_handle, 0));
|
|
|
|
for (;;)
|
|
{
|
|
if (!windows_continue (DBG_CONTINUE, -1, 1))
|
|
break;
|
|
if (!WaitForDebugEvent (¤t_event, INFINITE))
|
|
break;
|
|
if (current_event.dwDebugEventCode == EXIT_PROCESS_DEBUG_EVENT)
|
|
break;
|
|
}
|
|
|
|
target_mourn_inferior (inferior_ptid); /* Or just windows_mourn_inferior? */
|
|
}
|
|
|
|
void
|
|
windows_nat_target::close ()
|
|
{
|
|
DEBUG_EVENTS (("gdb: windows_close, inferior_ptid=%d\n",
|
|
inferior_ptid.pid ()));
|
|
}
|
|
|
|
/* Convert pid to printable format. */
|
|
std::string
|
|
windows_nat_target::pid_to_str (ptid_t ptid)
|
|
{
|
|
if (ptid.tid () != 0)
|
|
return string_printf ("Thread %d.0x%lx", ptid.pid (), ptid.tid ());
|
|
|
|
return normal_pid_to_str (ptid);
|
|
}
|
|
|
|
static enum target_xfer_status
|
|
windows_xfer_shared_libraries (struct target_ops *ops,
|
|
enum target_object object, const char *annex,
|
|
gdb_byte *readbuf, const gdb_byte *writebuf,
|
|
ULONGEST offset, ULONGEST len,
|
|
ULONGEST *xfered_len)
|
|
{
|
|
struct obstack obstack;
|
|
const char *buf;
|
|
LONGEST len_avail;
|
|
struct so_list *so;
|
|
|
|
if (writebuf)
|
|
return TARGET_XFER_E_IO;
|
|
|
|
obstack_init (&obstack);
|
|
obstack_grow_str (&obstack, "<library-list>\n");
|
|
for (so = solib_start.next; so; so = so->next)
|
|
{
|
|
lm_info_windows *li = (lm_info_windows *) so->lm_info;
|
|
|
|
windows_xfer_shared_library (so->so_name, (CORE_ADDR)
|
|
(uintptr_t) li->load_addr,
|
|
target_gdbarch (), &obstack);
|
|
}
|
|
obstack_grow_str0 (&obstack, "</library-list>\n");
|
|
|
|
buf = (const char *) obstack_finish (&obstack);
|
|
len_avail = strlen (buf);
|
|
if (offset >= len_avail)
|
|
len= 0;
|
|
else
|
|
{
|
|
if (len > len_avail - offset)
|
|
len = len_avail - offset;
|
|
memcpy (readbuf, buf + offset, len);
|
|
}
|
|
|
|
obstack_free (&obstack, NULL);
|
|
*xfered_len = (ULONGEST) len;
|
|
return len != 0 ? TARGET_XFER_OK : TARGET_XFER_EOF;
|
|
}
|
|
|
|
enum target_xfer_status
|
|
windows_nat_target::xfer_partial (enum target_object object,
|
|
const char *annex, gdb_byte *readbuf,
|
|
const gdb_byte *writebuf, ULONGEST offset,
|
|
ULONGEST len, ULONGEST *xfered_len)
|
|
{
|
|
switch (object)
|
|
{
|
|
case TARGET_OBJECT_MEMORY:
|
|
return windows_xfer_memory (readbuf, writebuf, offset, len, xfered_len);
|
|
|
|
case TARGET_OBJECT_LIBRARIES:
|
|
return windows_xfer_shared_libraries (this, object, annex, readbuf,
|
|
writebuf, offset, len, xfered_len);
|
|
|
|
default:
|
|
if (beneath () == NULL)
|
|
{
|
|
/* This can happen when requesting the transfer of unsupported
|
|
objects before a program has been started (and therefore
|
|
with the current_target having no target beneath). */
|
|
return TARGET_XFER_E_IO;
|
|
}
|
|
return beneath ()->xfer_partial (object, annex,
|
|
readbuf, writebuf, offset, len,
|
|
xfered_len);
|
|
}
|
|
}
|
|
|
|
/* Provide thread local base, i.e. Thread Information Block address.
|
|
Returns 1 if ptid is found and sets *ADDR to thread_local_base. */
|
|
|
|
bool
|
|
windows_nat_target::get_tib_address (ptid_t ptid, CORE_ADDR *addr)
|
|
{
|
|
windows_thread_info *th;
|
|
|
|
th = thread_rec (ptid.tid (), 0);
|
|
if (th == NULL)
|
|
return false;
|
|
|
|
if (addr != NULL)
|
|
*addr = th->thread_local_base;
|
|
|
|
return true;
|
|
}
|
|
|
|
ptid_t
|
|
windows_nat_target::get_ada_task_ptid (long lwp, long thread)
|
|
{
|
|
return ptid_t (inferior_ptid.pid (), 0, lwp);
|
|
}
|
|
|
|
/* Implementation of the to_thread_name method. */
|
|
|
|
const char *
|
|
windows_nat_target::thread_name (struct thread_info *thr)
|
|
{
|
|
return thread_rec (thr->ptid.tid (), 0)->name;
|
|
}
|
|
|
|
|
|
void
|
|
_initialize_windows_nat (void)
|
|
{
|
|
x86_dr_low.set_control = cygwin_set_dr7;
|
|
x86_dr_low.set_addr = cygwin_set_dr;
|
|
x86_dr_low.get_addr = cygwin_get_dr;
|
|
x86_dr_low.get_status = cygwin_get_dr6;
|
|
x86_dr_low.get_control = cygwin_get_dr7;
|
|
|
|
/* x86_dr_low.debug_register_length field is set by
|
|
calling x86_set_debug_register_length function
|
|
in processor windows specific native file. */
|
|
|
|
add_inf_child_target (&the_windows_nat_target);
|
|
|
|
#ifdef __CYGWIN__
|
|
cygwin_internal (CW_SET_DOS_FILE_WARNING, 0);
|
|
#endif
|
|
|
|
add_com ("signal-event", class_run, signal_event_command, _("\
|
|
Signal a crashed process with event ID, to allow its debugging.\n\
|
|
This command is needed in support of setting up GDB as JIT debugger on \
|
|
MS-Windows. The command should be invoked from the GDB command line using \
|
|
the '-ex' command-line option. The ID of the event that blocks the \
|
|
crashed process will be supplied by the Windows JIT debugging mechanism."));
|
|
|
|
#ifdef __CYGWIN__
|
|
add_setshow_boolean_cmd ("shell", class_support, &useshell, _("\
|
|
Set use of shell to start subprocess."), _("\
|
|
Show use of shell to start subprocess."), NULL,
|
|
NULL,
|
|
NULL, /* FIXME: i18n: */
|
|
&setlist, &showlist);
|
|
|
|
add_setshow_boolean_cmd ("cygwin-exceptions", class_support,
|
|
&cygwin_exceptions, _("\
|
|
Break when an exception is detected in the Cygwin DLL itself."), _("\
|
|
Show whether gdb breaks on exceptions in the Cygwin DLL itself."), NULL,
|
|
NULL,
|
|
NULL, /* FIXME: i18n: */
|
|
&setlist, &showlist);
|
|
#endif
|
|
|
|
add_setshow_boolean_cmd ("new-console", class_support, &new_console, _("\
|
|
Set creation of new console when creating child process."), _("\
|
|
Show creation of new console when creating child process."), NULL,
|
|
NULL,
|
|
NULL, /* FIXME: i18n: */
|
|
&setlist, &showlist);
|
|
|
|
add_setshow_boolean_cmd ("new-group", class_support, &new_group, _("\
|
|
Set creation of new group when creating child process."), _("\
|
|
Show creation of new group when creating child process."), NULL,
|
|
NULL,
|
|
NULL, /* FIXME: i18n: */
|
|
&setlist, &showlist);
|
|
|
|
add_setshow_boolean_cmd ("debugexec", class_support, &debug_exec, _("\
|
|
Set whether to display execution in child process."), _("\
|
|
Show whether to display execution in child process."), NULL,
|
|
NULL,
|
|
NULL, /* FIXME: i18n: */
|
|
&setlist, &showlist);
|
|
|
|
add_setshow_boolean_cmd ("debugevents", class_support, &debug_events, _("\
|
|
Set whether to display kernel events in child process."), _("\
|
|
Show whether to display kernel events in child process."), NULL,
|
|
NULL,
|
|
NULL, /* FIXME: i18n: */
|
|
&setlist, &showlist);
|
|
|
|
add_setshow_boolean_cmd ("debugmemory", class_support, &debug_memory, _("\
|
|
Set whether to display memory accesses in child process."), _("\
|
|
Show whether to display memory accesses in child process."), NULL,
|
|
NULL,
|
|
NULL, /* FIXME: i18n: */
|
|
&setlist, &showlist);
|
|
|
|
add_setshow_boolean_cmd ("debugexceptions", class_support,
|
|
&debug_exceptions, _("\
|
|
Set whether to display kernel exceptions in child process."), _("\
|
|
Show whether to display kernel exceptions in child process."), NULL,
|
|
NULL,
|
|
NULL, /* FIXME: i18n: */
|
|
&setlist, &showlist);
|
|
|
|
init_w32_command_list ();
|
|
|
|
add_cmd ("selector", class_info, display_selectors,
|
|
_("Display selectors infos."),
|
|
&info_w32_cmdlist);
|
|
}
|
|
|
|
/* Hardware watchpoint support, adapted from go32-nat.c code. */
|
|
|
|
/* Pass the address ADDR to the inferior in the I'th debug register.
|
|
Here we just store the address in dr array, the registers will be
|
|
actually set up when windows_continue is called. */
|
|
static void
|
|
cygwin_set_dr (int i, CORE_ADDR addr)
|
|
{
|
|
if (i < 0 || i > 3)
|
|
internal_error (__FILE__, __LINE__,
|
|
_("Invalid register %d in cygwin_set_dr.\n"), i);
|
|
dr[i] = addr;
|
|
debug_registers_changed = 1;
|
|
debug_registers_used = 1;
|
|
}
|
|
|
|
/* Pass the value VAL to the inferior in the DR7 debug control
|
|
register. Here we just store the address in D_REGS, the watchpoint
|
|
will be actually set up in windows_wait. */
|
|
static void
|
|
cygwin_set_dr7 (unsigned long val)
|
|
{
|
|
dr[7] = (CORE_ADDR) val;
|
|
debug_registers_changed = 1;
|
|
debug_registers_used = 1;
|
|
}
|
|
|
|
/* Get the value of debug register I from the inferior. */
|
|
|
|
static CORE_ADDR
|
|
cygwin_get_dr (int i)
|
|
{
|
|
return dr[i];
|
|
}
|
|
|
|
/* Get the value of the DR6 debug status register from the inferior.
|
|
Here we just return the value stored in dr[6]
|
|
by the last call to thread_rec for current_event.dwThreadId id. */
|
|
static unsigned long
|
|
cygwin_get_dr6 (void)
|
|
{
|
|
return (unsigned long) dr[6];
|
|
}
|
|
|
|
/* Get the value of the DR7 debug status register from the inferior.
|
|
Here we just return the value stored in dr[7] by the last call to
|
|
thread_rec for current_event.dwThreadId id. */
|
|
|
|
static unsigned long
|
|
cygwin_get_dr7 (void)
|
|
{
|
|
return (unsigned long) dr[7];
|
|
}
|
|
|
|
/* Determine if the thread referenced by "ptid" is alive
|
|
by "polling" it. If WaitForSingleObject returns WAIT_OBJECT_0
|
|
it means that the thread has died. Otherwise it is assumed to be alive. */
|
|
|
|
bool
|
|
windows_nat_target::thread_alive (ptid_t ptid)
|
|
{
|
|
int tid;
|
|
|
|
gdb_assert (ptid.tid () != 0);
|
|
tid = ptid.tid ();
|
|
|
|
return WaitForSingleObject (thread_rec (tid, FALSE)->h, 0) != WAIT_OBJECT_0;
|
|
}
|
|
|
|
void
|
|
_initialize_check_for_gdb_ini (void)
|
|
{
|
|
char *homedir;
|
|
if (inhibit_gdbinit)
|
|
return;
|
|
|
|
homedir = getenv ("HOME");
|
|
if (homedir)
|
|
{
|
|
char *p;
|
|
char *oldini = (char *) alloca (strlen (homedir) +
|
|
sizeof ("gdb.ini") + 1);
|
|
strcpy (oldini, homedir);
|
|
p = strchr (oldini, '\0');
|
|
if (p > oldini && !IS_DIR_SEPARATOR (p[-1]))
|
|
*p++ = '/';
|
|
strcpy (p, "gdb.ini");
|
|
if (access (oldini, 0) == 0)
|
|
{
|
|
int len = strlen (oldini);
|
|
char *newini = (char *) alloca (len + 2);
|
|
|
|
xsnprintf (newini, len + 2, "%.*s.gdbinit",
|
|
(int) (len - (sizeof ("gdb.ini") - 1)), oldini);
|
|
warning (_("obsolete '%s' found. Rename to '%s'."), oldini, newini);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Define dummy functions which always return error for the rare cases where
|
|
these functions could not be found. */
|
|
static BOOL WINAPI
|
|
bad_DebugActiveProcessStop (DWORD w)
|
|
{
|
|
return FALSE;
|
|
}
|
|
static BOOL WINAPI
|
|
bad_DebugBreakProcess (HANDLE w)
|
|
{
|
|
return FALSE;
|
|
}
|
|
static BOOL WINAPI
|
|
bad_DebugSetProcessKillOnExit (BOOL w)
|
|
{
|
|
return FALSE;
|
|
}
|
|
static BOOL WINAPI
|
|
bad_EnumProcessModules (HANDLE w, HMODULE *x, DWORD y, LPDWORD z)
|
|
{
|
|
return FALSE;
|
|
}
|
|
|
|
#ifdef __USEWIDE
|
|
static DWORD WINAPI
|
|
bad_GetModuleFileNameExW (HANDLE w, HMODULE x, LPWSTR y, DWORD z)
|
|
{
|
|
return 0;
|
|
}
|
|
#else
|
|
static DWORD WINAPI
|
|
bad_GetModuleFileNameExA (HANDLE w, HMODULE x, LPSTR y, DWORD z)
|
|
{
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
static BOOL WINAPI
|
|
bad_GetModuleInformation (HANDLE w, HMODULE x, LPMODULEINFO y, DWORD z)
|
|
{
|
|
return FALSE;
|
|
}
|
|
|
|
static BOOL WINAPI
|
|
bad_OpenProcessToken (HANDLE w, DWORD x, PHANDLE y)
|
|
{
|
|
return FALSE;
|
|
}
|
|
|
|
static BOOL WINAPI
|
|
bad_GetCurrentConsoleFont (HANDLE w, BOOL bMaxWindow, CONSOLE_FONT_INFO *f)
|
|
{
|
|
f->nFont = 0;
|
|
return 1;
|
|
}
|
|
static COORD WINAPI
|
|
bad_GetConsoleFontSize (HANDLE w, DWORD nFont)
|
|
{
|
|
COORD size;
|
|
size.X = 8;
|
|
size.Y = 12;
|
|
return size;
|
|
}
|
|
|
|
/* Load any functions which may not be available in ancient versions
|
|
of Windows. */
|
|
|
|
void
|
|
_initialize_loadable (void)
|
|
{
|
|
HMODULE hm = NULL;
|
|
|
|
#define GPA(m, func) \
|
|
func = (func ## _ftype *) GetProcAddress (m, #func)
|
|
|
|
hm = LoadLibrary ("kernel32.dll");
|
|
if (hm)
|
|
{
|
|
GPA (hm, DebugActiveProcessStop);
|
|
GPA (hm, DebugBreakProcess);
|
|
GPA (hm, DebugSetProcessKillOnExit);
|
|
GPA (hm, GetConsoleFontSize);
|
|
GPA (hm, DebugActiveProcessStop);
|
|
GPA (hm, GetCurrentConsoleFont);
|
|
}
|
|
|
|
/* Set variables to dummy versions of these processes if the function
|
|
wasn't found in kernel32.dll. */
|
|
if (!DebugBreakProcess)
|
|
DebugBreakProcess = bad_DebugBreakProcess;
|
|
if (!DebugActiveProcessStop || !DebugSetProcessKillOnExit)
|
|
{
|
|
DebugActiveProcessStop = bad_DebugActiveProcessStop;
|
|
DebugSetProcessKillOnExit = bad_DebugSetProcessKillOnExit;
|
|
}
|
|
if (!GetConsoleFontSize)
|
|
GetConsoleFontSize = bad_GetConsoleFontSize;
|
|
if (!GetCurrentConsoleFont)
|
|
GetCurrentConsoleFont = bad_GetCurrentConsoleFont;
|
|
|
|
/* Load optional functions used for retrieving filename information
|
|
associated with the currently debugged process or its dlls. */
|
|
hm = LoadLibrary ("psapi.dll");
|
|
if (hm)
|
|
{
|
|
GPA (hm, EnumProcessModules);
|
|
GPA (hm, GetModuleInformation);
|
|
GetModuleFileNameEx = (GetModuleFileNameEx_ftype *)
|
|
GetProcAddress (hm, GetModuleFileNameEx_name);
|
|
}
|
|
|
|
if (!EnumProcessModules || !GetModuleInformation || !GetModuleFileNameEx)
|
|
{
|
|
/* Set variables to dummy versions of these processes if the function
|
|
wasn't found in psapi.dll. */
|
|
EnumProcessModules = bad_EnumProcessModules;
|
|
GetModuleInformation = bad_GetModuleInformation;
|
|
GetModuleFileNameEx = bad_GetModuleFileNameEx;
|
|
/* This will probably fail on Windows 9x/Me. Let the user know
|
|
that we're missing some functionality. */
|
|
warning(_("\
|
|
cannot automatically find executable file or library to read symbols.\n\
|
|
Use \"file\" or \"dll\" command to load executable/libraries directly."));
|
|
}
|
|
|
|
hm = LoadLibrary ("advapi32.dll");
|
|
if (hm)
|
|
{
|
|
GPA (hm, OpenProcessToken);
|
|
GPA (hm, LookupPrivilegeValueA);
|
|
GPA (hm, AdjustTokenPrivileges);
|
|
/* Only need to set one of these since if OpenProcessToken fails nothing
|
|
else is needed. */
|
|
if (!OpenProcessToken || !LookupPrivilegeValueA
|
|
|| !AdjustTokenPrivileges)
|
|
OpenProcessToken = bad_OpenProcessToken;
|
|
}
|
|
|
|
#undef GPA
|
|
}
|