gdbserver/linux-low: turn 'get_thread_area' into a method

gdbserver/ChangeLog:
2020-04-02  Tankut Baris Aktemur  <tankut.baris.aktemur@intel.com>

	Turn the 'get_thread_area' linux target op into a method of
	process_stratum_target.

	* linux-low.h (struct linux_target_ops): Remove the op.
	(class linux_process_target) <stuck_in_jump_pad>
	<linux_fast_tracepoint_collecting>
	<low_get_thread_area>: Declare.
	* linux-low.cc (supports_fast_tracepoints): Remove.
	(linux_fast_tracepoint_collecting): Turn into...
	(linux_process_target::linux_fast_tracepoint_collecting): ...this.
	(linux_process_target::low_get_thread_area): Define.
	(stuck_in_jump_pad_callback): Turn into...
	(linux_process_target::stuck_in_jump_pad): ...this.

	Update the caller below.

	(linux_process_target::stabilize_threads)

	* linux-x86-low.cc (class x86_target) <low_get_thread_area>:
	Declare.
	(x86_get_thread_area): Turn into...
	(x86_target::low_get_thread_area): ...this.
	(the_low_target): Remove the op field.
	* linux-aarch64-low.cc (class aarch64_target) <low_get_thread_area>:
	Declare.
	(aarch64_get_thread_area): Turn into...
	(aarch64_target::low_get_thread_area): ...this.
	(the_low_target): Remove the op field.
	* linux-ppc-low.cc (class ppc_target) <low_get_thread_area>:
	Declare.
	(ppc_get_thread_area): Turn into...
	(ppc_target::low_get_thread_area): ...this.
	(the_low_target): Remove the op field.
	* linux-s390-low.cc (class s390_target) <low_get_thread_area>:
	Declare.
	(s390_get_thread_area): Turn into...
	(s390_target::low_get_thread_area): ...this.
	(the_low_target): Remove the op field.
	* linux-arm-low.cc (the_low_target): Remove the op field.
	* linux-bfin-low.cc (the_low_target): Ditto.
	* linux-crisv32-low.cc (the_low_target): Ditto.
	* linux-m32r-low.cc (the_low_target): Ditto.
	* linux-m68k-low.cc (the_low_target): Ditto.
	* linux-sh-low.cc (the_low_target): Ditto.
	* linux-tic6x-low.cc (the_low_target): Ditto.
	* linux-tile-low.cc (the_low_target): Ditto.
	* linux-xtensa-low.cc (the_low_target): Ditto.

1 files changed, 15 insertions, 4 deletions

diff --git a/gdbserver/linux-low.h b/gdbserver/linux-low.h
index 223b19d..58e5e67 100644
--- a/gdbserver/linux-low.h
+++ b/gdbserver/linux-low.h
@@ -131,10 +131,6 @@ struct lwp_info;
 
 struct linux_target_ops
 {
-  /* Fill ADDRP with the thread area address of LWPID.  Returns 0 on
-     success, -1 on failure.  */
-  int (*get_thread_area) (int lwpid, CORE_ADDR *addrp);
-
   /* Install a fast tracepoint jump pad.  See target.h for
      comments.  */
   int (*install_fast_tracepoint_jump_pad) (CORE_ADDR tpoint, CORE_ADDR tpaddr,
@@ -624,6 +620,17 @@ private: /* Back to private.  */
   ptid_t filter_exit_event (lwp_info *event_child,
 			    target_waitstatus *ourstatus);
 
+  /* Returns true if THREAD is stopped in a jump pad, and we can't
+     move it out, because we need to report the stop event to GDB.  For
+     example, if the user puts a breakpoint in the jump pad, it's
+     because she wants to debug it.  */
+  bool stuck_in_jump_pad (thread_info *thread);
+
+  /* Convenience wrapper.  Returns information about LWP's fast tracepoint
+     collection status.  */
+  fast_tpoint_collect_result linux_fast_tracepoint_collecting
+    (lwp_info *lwp, fast_tpoint_collect_status *status);
+
 protected:
   /* The architecture-specific "low" methods are listed below.  */
 
@@ -710,6 +717,10 @@ protected:
   /* Hook to call prior to resuming a thread.  */
   virtual void low_prepare_to_resume (lwp_info *lwp);
 
+  /* Fill ADDRP with the thread area address of LWPID.  Returns 0 on
+     success, -1 on failure.  */
+  virtual int low_get_thread_area (int lwpid, CORE_ADDR *addrp);
+
   /* How many bytes the PC should be decremented after a break.  */
   virtual int low_decr_pc_after_break ();
 };