Target interface for reverse debugging.
* target.h (enum target_waitkind):
Add new wait event, TARGET_WAITKIND_NO_HISTORY.
(struct target_ops): New method to_can_execute_reverse.
(target_can_execute_reverse): New macro.
* target.c (update_current_target): Inherit to_can_execute_reverse.
Remote interface for reverse debugging.
* remote.c (remote_can_execute_reverse): New target method.
(remote_resume): Check for reverse exec direction, and send
appropriate command to target.
(remote_wait_as): Check target response for NO_HISTORY status.
Also check for empty reply (target doesn't understand "bs" or "bc).
(remote_vcont_resume): Jump out if attempting reverse execution.
Event handling interface for reverse debugging.
* infrun.c (execution_direction): New state variable.
(enum inferior_stop_reason): Add NO_HISTORY reason.
(handle_inferior_event): Handle TARGET_WAITKIND_NO_HISTORY.
Handle stepping over a function call in reverse.
Handle stepping thru a line range in reverse.
Handle setting a step-resume breakpoint in reverse.
Handle stepping into a function in reverse.
Handle stepping between line ranges in reverse.
(print_stop_reason): Print reason for NO_HISTORY.
(step_into_function): Rename to handle_step_into_function.
(handle_step_into_function_backward): New function.
(set_exec_direction_func, show_exec_direction_func): New funcs.
(proceed): No need to singlestep over a breakpoint
when resuming in reverse.
* inferior.h (enum exec_direction_kind): New enum.
(execution_direction): Export new execution state variable.
* breakpoint.c (make_breakpoint_silent): New function.
* breakpoint.h (make_breakpoint_silent): Export.
* infcmd.c (finish_command): Check for reverse exec direction.
(finish_backward): New function, handle finish cmd in reverse.
User interface for reverse execution.
* Makefile.in (reverse.c): New file.
* reverse.c: New file. User interface for reverse execution.
Delete bp_catch_fork and bp_catch_vfork.
(struct breakpoint_ops): Add new methods "insert", "remove"
and "breakpoint_hit".
* breakpoint.c (create_fork_vfork_event_catchpoint)
(create_fork_event_catchpoint, create_vfork_event_catchpoint): Remove.
(insert_catchpoint): Remove handling of bp_catch_fork and
bp_catch_vfork catchpoints, and handle them as bp_catchpoint
catchpoints instead.
(insert_bp_location, update_breakpoints_after_exec)
(remove_breakpoint, bpstat_check_location, bpstat_what)
(allocate_bp_location): Likewise.
(print_it_typical, print_one_breakpoint_location, mention): Remove
handling of bp_catch_fork and bp_catch_vfork breakpoints.
(ep_is_catchpoint, user_settable_breakpoint)
(breakpoint_address_is_meaningful, adjust_breakpoint_address)
(breakpoint_re_set_one, disable_command, enable_command):
Remove use of bp_catch_fork and bp_catch_vfork. Add handling of
bp_catchpoint breakpoints.
(insert_catch_fork, remove_catch_fork, breakpoint_hit_catch_fork)
(print_it_catch_fork, print_one_catch_fork, print_mention_catch_fork):
New functions.
(catch_fork_breakpoint_ops): New static constant.
(insert_catch_vfork, remove_catch_vfork, breakpoint_hit_catch_vfork)
(print_it_catch_vfork, print_one_catch_vfork)
(print_mention_catch_vfork): New functions.
(catch_vfork_breakpoint_ops): New static constant.
(create_catchpoint, create_fork_vfork_event_catchpoint): New functions.
(catch_fork_command_1): Use create_fork_vfork_event_catchpoint
to create the fork and vfork catchpoints.
(gnu_v3_exception_catchpoint_ops): Set new breakpoint_ops fields.
* ada-lang.c (catch_exception_breakpoint_ops): Set new breakpoint_ops
fields.
(catch_exception_unhandled_breakpoint_ops): Likewise.
(catch_assert_breakpoint_ops): Likewise.
loop. Always restore the SIGINT handler. Discard all inferiors
here.
(remote_detach_1, remote_disconnect): Don't unregister the file
descriptor from the event loop here.
(interrupt_query, readchar, getpkt_sane): Pop the target instead
of morning the current inferior.
(remote_kill): Don't unregister the file descriptor from the event
loop here.
(remote_mourn_1): Don't discard inferiors here.
* breakpoint.c (breakpoint_init_inferior): Clean up the moribund
locations list.
(moribund_breakpoint_here_p): Record the moribund
location in the moribund_locations vector.
* breakpoint.h (moribund_breakpoint_here_p): Declare.
(displaced_step_fixup): Check if the breakpoint the thread was
trying to step over has been removed since having been placed in
the displaced stepping queue.
(adjust_pc_after_break): In non-stop mode, check for a moribund
breakpoint at the stop pc.
(handle_inferior_event): Don't retire moribund breakpoints on
TARGET_WAITKIND_IGNORE.
gdb/testsuite/
* gdb.mi/mi-nsmoribund.exp, gdb.mi/nsmoribund.c: New test.
(remote_wait_as): ... this. Don't loop here. If the remote
didn't stop, return TARGET_WAITKIND_IGNORE.
(remote_wait): New, reimplemented on top of remote_wait_as.
