Occasionaly we hear about people having problems with GDB not being
able to start programs (with "run"/"start"). GDB spawns a shell to
start the program, and most often, it'll be the case that the problem
is actually with the user's shell setup.
GDB has code to disable the use of the shell to start programs.
That's the STARTUP_WITH_SHELL macro that native targets could set to 0
in their nm.h file (though no target actually uses it nowadays).
This patch makes that setting a run-time knob instead. This will be
useful to quickly diagnose such shell issues, and might also come in
handy at other times (such as when debugging the shell itself, if you
don't have a different shell handy).
gdb/
2013-10-24 Pedro Alves <palves@redhat.com>
* NEWS (New options): Mention set/show startup-with-shell.
* config/alpha/nm-osf3.h (START_INFERIOR_TRAPS_EXPECTED): Set to 2
instead of 3.
* fork-child.c (fork_inferior, startup_inferior): Handle 'set
startup-with-shell'.
(show_startup_with_shell): New function.
(_initialize_fork_child): Register the set/show startup-with-shell
commands.
* inf-ptrace.c (inf_ptrace_create_inferior): Remove comment.
* inf-ttrace.c (inf_ttrace_him): Remove comment.
* procfs.c (procfs_init_inferior): Remove comment.
* infcmd.c (startup_with_shell): New global.
* inferior.h (startup_with_shell): Declare global.
(STARTUP_WITH_SHELL): Delete.
(START_INFERIOR_TRAPS_EXPECTED): Set to 1 by default instead of 2.
gdb/doc/
2013-10-24 Pedro Alves <palves@redhat.com>
* gdb.texinfo (Starting): Document set/show startup-with-shell.
will hold the signal number when the inferior terminates due to the
uncaught signal.
I've made modifications on infrun.c:handle_inferior_event such that
$_exitcode gets cleared when the inferior signalled, and vice-versa.
This assumption was made because the variables are mutually
exclusive, i.e., when the inferior terminates because of an uncaught
signal it is not possible for it to return. I have also made modifications
such that when a corefile is loaded, $_exitsignal gets set to the uncaught
signal that "killed" the inferior, and $_exitcode is cleared.
The patch also adds a NEWS entry, documentation bits, and a testcase. The
documentation entry explains how to use $_exitsignal and $_exitcode in a
GDB script, by making use of the new $_isvoid convenience function.
gdb/
2013-10-06 Sergio Durigan Junior <sergiodj@redhat.com>
* NEWS: Mention new convenience variable $_exitsignal.
* corelow.c (core_open): Reset exit convenience variables. Set
$_exitsignal to the uncaught signal which generated the corefile.
* infrun.c (handle_inferior_event): Reset exit convenience
variables. Set $_exitsignal for TARGET_WAITKIND_SIGNALLED.
(clear_exit_convenience_vars): New function.
* inferior.h (clear_exit_convenience_vars): New prototype.
gdb/testsuite/
2013-10-06 Sergio Durigan Junior <sergiodj@redhat.com>
* gdb.base/corefile.exp: Test whether $_exitsignal is set and
$_exitcode is void when opening a corefile.
* gdb.base/exitsignal.exp: New file.
* gdb.base/segv.c: Likewise.
* gdb.base/normal.c: Likewise.
gdb/doc/
2013-10-06 Sergio Durigan Junior <sergiodj@redhat.com>
* gdb.texinfo (Convenience Variables): Document $_exitsignal.
Update entry for $_exitcode.
detach_fork.
* inf-ptrace.c (inf_ptrace_follow_fork): Likewise.
* inf-ttrace.c (inf_ttrace_follow_fork): Likewise.
* inferior.h (detach_fork): Remove.
* infrun.c (detach_fork): Adjust comment and make it
static.
(follow_fork): Pass detach_fork parameter to
target_follow_fork.
* linux-nat.c (linux_child_follow_fork): New parameter
detach_fork.
* target.c (target_follow_fork): New parameter detach_fork.
Pass detach_fork as parameter and print its value.
* target.h (struct target_ops) <to_follow_fork>: New int
parameter.
(target_follow_fork): New parameter detach_fork.
Two modifications:
1. The addition of 2013 to the copyright year range for every file;
2. The use of a single year range, instead of potentially multiple
year ranges, as approved by the FSF.
2012-11-30 Yao Qi <yao@codesourcery.com>
* infrun.c (error_is_running, ensure_not_running): Move them
to ...
* infcmd.c (error_is_running, ensure_not_running): ... here.
Make them 'static'.
* inferior.h: Remove declarations of error_is_running and
ensure_not_running.
2012-11-09 Pedro Alves <palves@redhat.com>
* gdbarch.sh (target_gdbarch) <gdbarch.h>: Reimplement as macro.
(get_target_gdbarch) <gdbarch.h>: New function.
(startup_gdbarch) <gdbarch.h>: Declare.
<gdbarch.c> (target_gdbarch): Delete.
<gdbarch.c> (deprecated_target_gdbarch_select_hack): Set the
current inferior's gdbarch.
<gdbarch.c> (get_target_gdbarch): New function.
* inferior.c: Include target-descriptions.h.
(free_inferior): Free target description info.
(add_inferior_with_spaces): Set the inferior's initial
architecture.
(clone_inferior_command): Copy the original inferior's target
description if it was user specified.
(initialize_inferiors): Add comment.
* inferior.h (struct target_desc_info): Forward declare.
(struct inferior) <gdbarch>: New field.
* linux-nat.c: Include target-descriptions.h.
(linux_child_follow_fork): Copy the parent's architecture and
target description to the child.
* target-descriptions.c: Include inferior.h.
(struct target_desc_info): New structure, holding the equivalents
of ...
(target_desc_fetched, current_target_desc)
(target_description_filename): ... these removed globals.
(get_tdesc_info, target_desc_info_from_user_p)
(copy_inferior_target_desc_info, target_desc_info_free): New.
(target_desc_fetched, current_target_desc)
(target_description_filename): Reimplemented as convenience
macros.
(tdesc_filename_cmd_string): New global.
(set_tdesc_filename_cmd): Copy the string manipulated by the "set
tdescs filename ..." commands to the per-inferior equivalent.
(show_tdesc_filename_cmd): Get the value to show from the
per-inferior description filename.
(_initilize_target_descriptions): Change the "set/show tdesc
filename" commands' variable.
* target-descriptions.h (struct target_desc, struct target_desc_info)
(struct inferior): Forward declare.
(target_find_description, target_clear_description)
(target_current_description): Adjust comments.
(copy_inferior_target_desc_info, target_desc_info_free)
(target_desc_info_from_user_p). Declare.
gdb/testsuite/
2012-11-09 Pedro Alves <palves@redhat.com>
* gdb.multi/multi-arch.exp: New.
PR build/14003
* inferior.h (struct inferior_suspend_state): Comment out.
(struct inferior): Comment out the field suspend.
* infrun.c (struct infcall_suspend_state): Comment out the field
inferior_suspend.
(save_infcall_suspend_state, restore_infcall_suspend_state): Comment
out its assignment.
* breakpoint.h (bp_location): Add related_address member.
* inferior.h (get_return_value): Take a pointer to struct value
instead of struct type for the function requested.
* value.h (using_struct_return): Likewise.
* gdbarch.sh (return_value): Take a pointer to struct value
instead of struct type for the function requested.
* breakpoint.c (set_breakpoint_location_function): Initialize
related_address for bp_gnu_ifunc_resolver breakpoints.
* elfread.c (elf_gnu_ifunc_resolver_return_stop): Pass the
requested function's address to gdbarch_return_value.
* eval.c (evaluate_subexp_standard): Pass the requested
function's address to using_struct_return.
* infcall.c (call_function_by_hand): Pass the requested
function's address to using_struct_return and
gdbarch_return_value.
* infcmd.c (get_return_value): Take a pointer to struct value
instead of struct type for the function requested.
(print_return_value): Update accordingly.
(finish_command_continuation): Likewise.
* stack.c (return_command): Pass the requested function's
address to using_struct_return and gdbarch_return_value.
* value.c (using_struct_return): Take a pointer to struct value
instead of struct type for the function requested. Pass the
requested function's address to gdbarch_return_value.
* python/py-finishbreakpoint.c (finish_breakpoint_object):
New function_value member, replacing function_type.
(bpfinishpy_dealloc): Update accordingly.
(bpfinishpy_pre_stop_hook): Likewise.
(bpfinishpy_init): Likewise. Record the requested function's
address.
* mips-tdep.c (mips_fval_reg): New enum.
(mips_o32_push_dummy_call): For MIPS16 FP doubles do not swap
words put in GP registers.
(mips_o64_push_dummy_call): Update a comment.
(mips_o32_return_value): Take a pointer to struct value instead
of struct type for the function requested and use it to check if
using the MIPS16 calling convention. Return the designated
general purpose registers for floating-point values returned in
MIPS16 mode.
(mips_o64_return_value): Likewise.
* ppc-tdep.h (ppc_sysv_abi_return_value): Update prototype.
(ppc_sysv_abi_broken_return_value): Likewise.
(ppc64_sysv_abi_return_value): Likewise.
* alpha-tdep.c (alpha_return_value): Take a pointer to struct
value instead of struct type for the function requested.
* amd64-tdep.c (amd64_return_value): Likewise.
* amd64-windows-tdep.c (amd64_windows_return_value): Likewise.
* arm-tdep.c (arm_return_value): Likewise.
* avr-tdep.c (avr_return_value): Likewise.
* bfin-tdep.c (bfin_return_value): Likewise.
* cris-tdep.c (cris_return_value): Likewise.
* frv-tdep.c (frv_return_value): Likewise.
* h8300-tdep.c (h8300_return_value): Likewise.
(h8300h_return_value): Likewise.
* hppa-tdep.c (hppa32_return_value): Likewise.
(hppa64_return_value): Likewise.
* i386-tdep.c (i386_return_value): Likewise.
* ia64-tdep.c (ia64_return_value): Likewise.
* iq2000-tdep.c (iq2000_return_value): Likewise.
* lm32-tdep.c (lm32_return_value): Likewise.
* m32c-tdep.c (m32c_return_value): Likewise.
* m32r-tdep.c (m32r_return_value): Likewise.
* m68hc11-tdep.c (m68hc11_return_value): Likewise.
* m68k-tdep.c (m68k_return_value): Likewise.
(m68k_svr4_return_value): Likewise.
* m88k-tdep.c (m88k_return_value): Likewise.
* mep-tdep.c (mep_return_value): Likewise.
* microblaze-tdep.c (microblaze_return_value): Likewise.
* mn10300-tdep.c (mn10300_return_value): Likewise.
* moxie-tdep.c (moxie_return_value): Likewise.
* mt-tdep.c (mt_return_value): Likewise.
* ppc-linux-tdep.c (ppc_linux_return_value): Likewise.
* ppc-sysv-tdep.c (ppc_sysv_abi_return_value): Likewise.
(ppc_sysv_abi_broken_return_value): Likewise.
(ppc64_sysv_abi_return_value): Likewise.
* ppcnbsd-tdep.c (ppcnbsd_return_value): Likewise.
* rl78-tdep.c (rl78_return_value): Likewise.
* rs6000-aix-tdep.c (rs6000_return_value): Likewise.
* rx-tdep.c (rx_return_value): Likewise.
* s390-tdep.c (s390_return_value): Likewise.
* score-tdep.c (score_return_value): Likewise.
* sh-tdep.c (sh_return_value_nofpu): Likewise.
(sh_return_value_fpu): Likewise.
* sh64-tdep.c (sh64_return_value): Likewise.
* sparc-tdep.c (sparc32_return_value): Likewise.
* sparc64-tdep.c (sparc64_return_value): Likewise.
* spu-tdep.c (spu_return_value): Likewise.
* tic6x-tdep.c (tic6x_return_value): Likewise.
* v850-tdep.c (v850_return_value): Likewise.
* vax-tdep.c (vax_return_value): Likewise.
* xstormy16-tdep.c (xstormy16_return_value): Likewise.
* xtensa-tdep.c (xtensa_return_value): Likewise.
* gdbarch.c: Regenerate.
* gdbarch.h: Regenerate.
gdb/testsuite/
* gdb.base/return-nodebug.exp: Also test float and double types.
Now that this method is no longer used by any architecture,
we can remove its support.
gdb/ChangeLog:
* infcall.c (call_function_by_hand): Remove AT_SYMBOL handling.
* inferior.h (AT_SYMBOL): Delete.
symfile_flags.
* solib.c (solib_read_symbols): Use inferior's symfile_flags.
* linux-nat.c (linux_child_follow_fork): Set symfile_flags on
inferior.
* infrun.c (handle_vfork_child_exec_or_exit): Set symfile_flags on
inferior.
(follow_exec): Use inferior's symfile_flags.
* inferior.h (struct inferior) <symfile_flags>: New field.
Ulrich Weigand <ulrich.weigand@linaro.org>
* inferior.h (struct inferior): Add fake_pid_p.
* inferior.c (exit_inferior_1): Clear fake_pid_p.
* remote.c (remote_start_remote): Set fake_pid_p if we have to use
magic_null_ptid since the remote side doesn't provide a real PID.
The body of this function has been commented out since Jul 1999, and
thus seems unnecessary. While at it, remove some commented out code
that seems to be related to the function being deleted.
gdb/ChangeLog:
* corefile.c (close_exec_file): Delete.
(reopen_exec_file): Remove commented out code that seems related
to close_exec_file, which is being deleted here.
* inferior.h (close_exec_file): Delete.
* fork-child.c (fork_inferior): Remove call to fork_inferior.
* Makefile.in (SUBDIR_PYTHON_OBS): Add py-finishbreakpoint.o.
(SUBDIR_PYTHON_SRCS): Add python/py-finishbreakpoint.c.
Add build rule for this file.
* infcmd.c (print_return_value): Split to create get_return_value.
(get_return_value): New function based on print_return_value. Handle
case where stop_registers are not set.
* inferior.h (get_return_value): New prototype.
* python/py-breakpoint.c (bppy_pending_object): Make non-static.
(gdbpy_breakpoint_created): Set is_py_finish_bp is necessary.
(struct breakpoint_object): Move to python-internal.h
(BPPY_REQUIRE_VALID): Likewise.
(BPPY_SET_REQUIRE_VALID): Likewise.
(gdbpy_breakpoint_created): Initialize is_finish_bp.
(gdbpy_should_stop): Add pre/post hooks before/after calling stop
method.
* python/python-internal.h (breakpoint_object_type): Add as extern.
(bppy_pending_object): Likewise.
(typedef struct breakpoint_object) Removed.
(struct breakpoint_object): Moved from py-breakpoint.c.
Add field is_finish_bp.
(BPPY_REQUIRE_VALID): Moved from py-breakpoint.c.
(BPPY_SET_REQUIRE_VALID): Likewise.
(frame_object_to_frame_info): New prototype.
(gdbpy_initialize_finishbreakpoints): New prototype.
(bpfinishpy_is_finish_bp): Likewise.
(bpfinishpy_pre_stop_hook): Likewise.
(bpfinishpy_post_stop_hook): Likewise.
* python/py-finishbreakpoint.c: New file.
* python/py-frame.c(frame_object_to_frame_info): Make non-static and
accept PyObject instead of frame_object.
(frapy_is_valid): Don't cast to frame_object.
(frapy_name): Likewise.
(frapy_type): Likewise.
(frapy_unwind_stop_reason): Likewise.
(frapy_pc): Likewise.
(frapy_block): Likewise.
(frapy_function): Likewise.
(frapy_older): Likewise.
(frapy_newer): Likewise.
(frapy_find_sal): Likewise.
(frapy_read_var): Likewise.
(frapy_select): Likewise.
* python/python.c (gdbpy_is_stopped_at_finish_bp): New noop function.
(_initialize_python): Add gdbpy_initialize_finishbreakpoints.
* python/python.h: Include breakpoint.h
(gdbpy_is_stopped_at_finish_bp): New prototype.
doc/
* gdb.texinfo (Finish Breakpoints in Python): New subsection.
(Python API): Add menu entry for Finish Breakpoints.
testsuite/
* Makefile.in (EXECUTABLES): Add py-finish-breakpoint and
py-finish-breakpoint2
(MISCALLANEOUS): Add py-events-shlib.so and py-events-shlib-nodebug.so
* gdb.python/py-breakpoint.exp (mult_line): Define and use variable
instead of line number.
* gdb.python/py-finish-breakpoint.c: New file.
* gdb.python/py-finish-breakpoint.exp: New file.
* gdb.python/py-finish-breakpoint.py: New file.
* gdb.python/py-finish-breakpoint2.cc: New file.
* gdb.python/py-finish-breakpoint2.exp: New file.
* gdb.python/py-finish-breakpoint2.py: New file.
* infrun.c (disable_randomization): New global variable.
(show_disable_randomization): New function.
(set_disable_randomization): Likewise.
(_initialize_infrun): Install set/show disable-randomization
commands.
* linux-nat.c (disable_randomization): Remove.
(show_disable_randomization): Likewise.
(set_disable_randomization): Likewise.
(_initialize_linux_nat): No longer install set/show
disable-randomization commands here.
(linux_nat_supports_disable_randomization): New function.
(linux_nat_add_target): Install it.
* remote.c (PACKET_QDisableRandomization): New enum value.
(remote_protocol_packets): Support QDisableRandomization.
(_initialize_remote): Likewise.
(remote_supports_disable_randomization): New function.
(init_remote_ops): Install it.
(extended_remote_supports_disable_randomization): New function.
(init_extended_remote_ops): Install it.
(extended_remote_disable_randomization): New function.
(extended_remote_create_inferior_1): Call it.
* target.h (struct target_ops): Add to_supports_disable_randomization.
(target_supports_disable_randomization): Add prototype.
* target.c (target_supports_disable_randomization): New function.
(find_default_supports_disable_randomization): Likewise.
(init_dummy_target): Install it.
doc/
* gdb.texinfo (Starting your Program): "set disable-randomization"
is no longer Linux-specific.
(Remote Configuration): Document "set remote
disable-randomization-packet".
(General Query Packets): Document "QDisableRandomization" packet
and add it to "qSupported" list.
gdbserver/
* configure.ac: Check support for personality routine.
* configure: Regenerate.
* config.in: Likewise.
* linux-low.c: Include <sys/personality.h>.
Define ADDR_NO_RANDOMIZE if necessary.
(linux_create_inferior): Disable address space randomization when
forking inferior, if requested.
(linux_supports_disable_randomization): New function.
(linux_target_ops): Install it.
* server.h (disable_randomization): Declare.
* server.c (disable_randomization): New global variable.
(handle_general_set): Handle QDisableRandomization.
(handle_query): Likewise for qSupported.
(main): Support --disable-randomization and --no-disable-randomization
command line arguments.
* target.h (struct target_ops): Add supports_disable_randomization.
(target_supports_disable_randomization): New macro.
* inferior.h (ALL_INFERIORS): New.
* linux-thread-db.c (thread_db_find_new_threads_2): Remove check
for a stopped thread.
(thread_db_find_new_threads): Look for threads in all inferiors.
gdb/
* record.c: Include event-loop.h, inf-loop.h.
(record_beneath_to_async): New global.
(tmp_to_async): New global.
(record_async_inferior_event_token): New global.
(record_open_1): Don't error out if async is enabled.
(record_open): Handle to_async. Create an async event source in
the event loop.
(record_close): Delete the async event source.
(record_resumed): New global.
(record_execution_dir): New global.
(record_resume, record_core_resume): Set them. Register the
target on the event loop.
(record_wait): Rename to ...
(record_wait_1): ... this. Add more debug output. Handle
TARGET_WNOHANG, and the target beneath returning
TARGET_WAITKIND_IGNORE.
(record_wait): Reimplement on top of record_wait_1.
(record_async_mask_value): New global.
(record_async, record_async_mask, record_can_async_p)
(record_is_async_p, record_execution_direction): New functions.
(init_record_ops, init_record_core_ops): Install new methods.
* infrun.c (fetch_inferior_event): Temporarily switch the global
execution direction to the direction the target was going.
(execution_direction): Change type to int.
* target.c (default_execution_direction): New function.
(update_current_target): Inherit and de_fault
to_execution_direction.
* target.h (struct target_ops) <to_execution_direction>: New
field.
(target_execution_direction): New macro.
* inferior.h (execution_direction): Change type to int.
gdb/
* infcmd.c (finish_backward): Set a step-resume breakpoint at the
function's entry point instead of a manually managed momentary
breakpoint, and only ever issue one proceed call.
* infrun.c (handle_inferior_event) <BPSTAT_WHAT_STEP_RESUME>: If
doing a reverse-finish, switch to stepi mode, to do another step.
(insert_step_resume_breakpoint_at_sal): Make public.
(normal_stop): No need to save function value return registers if
going reverse.
* inferior.h (insert_step_resume_breakpoint_at_sal): Declare.
gdb/testsuite/
* gdb.reverse/finish-reverse-bkpt.exp: New test.
gdb/
* infcmd.c: Include "inf-loop.h".
(step_once): When stepping into an inline subroutine, pretend the
target has run. If the target can async, switch the inferior
event loop to INF_EXEC_COMPLETE.
* inferior.h (user_visible_resume_ptid): Declare.
* infrun.c (user_visible_resume_ptid): New function, factored out
from `resume'.
(resume): Use it.
* mi/mi-main.c (mi_execute_async_cli_command): Remove assertion
that the current thread is running. Merge async and sync
branches.
Put prototype declaration on same line as return type.
* objc-exp.y: Ditto.
* p-exp.y: Ditto.
* python/py-stopevent.h: Ditto.
For long function names, split parameters to allow function name
on same line as return type.
* solib-pa64.c: Ditto.
* varobj.c: Ditto.
* varobj.h: Ditto.
For long function declaration, use single line.
* hppa-tdep.h: Ditto.
* inferior.h: Ditto.
* inferior.c (print_inferior): Accept a string instead of an int
for requested_inferiors, and use get_number_or_range to parse it.
(info_inferiors_command): Pass args string to print_inferior.
(initialize_inferiors): Change help string for info inferiors.
* inferior.h (print_inferior): Export prototype change.
2011-02-25 Michael Snyder <msnyder@vmware.com>
* gdb.multi/base.exp: Add tests for info inferiors with args.
Rename and move inferior_thread_state and inferior_status.
* gdbthread.h (struct thread_control_state): New struct, move fields
step_range_start, step_range_end, step_frame_id, step_stack_frame_id,
trap_expected, proceed_to_finish, in_infcall, step_over_calls,
stop_step and stop_bpstat here from struct thread_info.
(struct thread_suspend_state): New struct, move field stop_signal here
from struct thread_info.
(struct thread_info): Move the fields above from this struct.
* inferior.h: Move the inferior_thread_state and inferior_status
declarations comment to their definitions at infrun.c.
(struct inferior_control_state): New struct, move field stop_soon from
struct inferior here.
(struct inferior_suspend_state): New empty struct.
(struct inferior): New fields control and suspend. Move out field
stop_soon.
* infrun.c (struct inferior_thread_state): Rename to ...
(infcall_suspend_state): ... here. Replace field stop_signal by
fields thread_suspend and inferior_suspend.
(save_inferior_thread_state): Rename to ...
(save_infcall_suspend_state): ... here. New variable inf. Update the
code for new fields.
(restore_inferior_thread_state): Rename to ...
(restore_infcall_suspend_state): ... here. New variable inf. Update
the code for new fields.
(do_restore_inferior_thread_state_cleanup): Rename to ...
(do_restore_infcall_suspend_state_cleanup): ... here.
(make_cleanup_restore_inferior_thread_state): Rename to ...
(make_cleanup_restore_infcall_suspend_state): ... here.
(discard_inferior_thread_state): Rename to ...
(discard_infcall_suspend_state): ... here.
(get_inferior_thread_state_regcache): Rename to ...
(get_infcall_suspend_state_regcache): ... here.
(struct inferior_status): Rename to ...
(struct infcall_control_state): ... here. Replace fields
step_range_start, step_range_end, step_frame_id, step_stack_frame_id,
trap_expected, proceed_to_finish, in_infcall, step_over_calls,
stop_step, stop_bpstat and stop_soon by fields thread_control and
inferior_control.
(save_inferior_status): Rename to ...
(save_infcall_control_state): ... here. Update the code for new
fields.
(restore_inferior_status): Rename to ...
(restore_infcall_control_state): ... here. Update the code for new
fields.
(do_restore_inferior_status_cleanup): Rename to ...
(do_restore_infcall_control_state_cleanup): ... here.
(make_cleanup_restore_inferior_status): Rename to ...
(make_cleanup_restore_infcall_control_state): ... here.
(discard_inferior_status): Rename to ...
(discard_infcall_control_state): ... here.
* alpha-tdep.c, breakpoint.c, dummy-frame.c, dummy-frame.h,
exceptions.c, fbsd-nat.c, gdbthread.h, infcall.c, infcmd.c,
inferior.c, inferior.h, infrun.c, linux-nat.c, mi/mi-interp.c,
mips-tdep.c, procfs.c, solib-irix.c, solib-osf.c, solib-spu.c,
solib-sunos.c, solib-svr4.c, thread.c, windows-nat.c: Update all the
references to the moved fields and renamed functions.
Add per-operation permission flags.
* target.h (struct target_ops): New method to_set_permissions.
(target_set_permissions): New macro.
(target_insert_breakpoint): Change macro to function.
(target_remove_breakpoint): Ditto.
(target_stop): Ditto.
(may_write_registers): Declare.
(may_write_memory): Declare.
(may_insert_breakpoints): Declare.
(may_insert_tracepoints): Declare.
(may_insert_fast_tracepoints): Declare.
(may_stop): Declare.
* target.c (may_write_registers, may_write_registers_1): New globals.
(may_write_memory, may_write_memory_1): New globals.
(may_insert_breakpoints, may_insert_breakpoints_1): New globals.
(may_insert_tracepoints, may_insert_tracepoints_1): New globals.
(may_insert_fast_tracepoints, may_insert_fast_tracepoints_1): New
globals.
(may_stop, may_stop_1): New global.
(target_xfer_partial): Test for write permission.
(target_store_registers): Ditto.
(target_insert_breakpoint): New function.
(target_remove_breakpoint): New function.
(target_stop): New function.
(_initialize_targets): Add new set/show variables.
(set_write_memory_permission): New function.
(update_target_permissions): New function.
(set_target_permissions): New function.
(update_current_target): Default to_set_permissions.
(_initialize_targets): Use new globals and setter function.
* tracepoint.c (start_tracing): Test for permission.
* inferior.h (update_observer_mode): Declare.
* infrun.c (non_stop_1): Define earlier.
(observer_mode, observer_mode_1): New globals.
(set_observer_mode, show_observer_mode): New functions.
(update_observer_mode): New function.
(_initialize_infrun): Define "set observer" command.
* remote.c (PACKET_QAllow): New optional packet.
(remote_protocol_features): Add QAllow.
(remote_set_permissions): New function.
(remote_start_remote): Call it.
(init_remote_ops): Add it to target vector.
(_initialize_remote): Add config command for QAllow.
* gdb.texinfo (Observer Mode): New section.
(General Query Packets): Document QAllow.
* gdb.base/permissions.exp: New file.
