Hello,

According to the mail thread in http://sourceware-org.1504.n7.nabble.com/PATCH-Support-targets-that-know-how-to-step-over-breakpoints-td61666.html
I update patches to change step to continue.  When thread hop needed, GDB can use continue over breakpoints let the inferior keep going.

The interface that add to target is:
to_can_continue_over_breakpoints, it will return true if target can continue over breakpoints.
to_next_continue_over_breakpoints, call this function before call to_resume will make to_resume do continue_over_breakpoints instead of continue.

This patch is the GDB part that support continue over breakpoints.  And there also have patches for doc, server and test.  I will introduce them clear inside the mails of that paches.

Please help me review it.

Thanks,
Hui

2013-03-03  Luis Machado  <lgustavo@codesourcery.com>
	    Pedro Alves  <pedro@codesourcery.com>
	    Hui Zhu  <hui_zhu@mentor.com>

	* infrun.c (handle_inferior_event): Check if target can continue
	over breakpoints.

	* remote.c (struct remote_state): New member
	can_continue_over_breakpoints.
	(remote_continue_over_breakpoints_feature): New.
	(remote_protocol_features): Add ContinueOverBreakpoints feature.
	(remote_open_1): Clear can_continue_over_breakpoints.
	(remote_is_cob): New.
	(append_resumption, remote_resume): Check remote_is_cob.
	(remote_can_continue_over_breakpoints,
	 remote_next_continue_over_breakpoints): New.
	(init_remote_ops): Set remote_ops.to_can_continue_over_breakpoints
	to remote_can_continue_over_breakpoints.
	Set to_next_continue_over_breakpoints to
	remote_next_continue_over_breakpoints.

	* target.c (update_current_target): Inherit
	to_can_continue_over_breakpoints, and default it to return 0.
	Inherit to_next_continue_over_breakpoints.

	* target.h (struct target_ops): Add new
	to_can_step_over_breakpoints member.
	(target_can_step_over_breakpoints): New.