[PATCH v2 42/58] gdbserver: turn target op 'stabilize_threads' into a method

[Tankut Baris Aktemur <tankut.baris.aktemur@intel.com>]

gdbserver/ChangeLog:
2020-02-10  Tankut Baris Aktemur  <tankut.baris.aktemur@intel.com>

	Turn process_stratum_target's stabilize_threads op into a
	method of process_target.

	* target.h (struct process_stratum_target): Remove the target op.
	(class process_target): Add the target op.
	(target_stabilize_threads): Update the macro.
	* target.cc (process_target::stabilize_threads): Define.

	Update the derived classes and callers below.

	* server.cc (handle_status): Update.
	* tracepoint.cc (cmd_qtdp): Update.
	(cmd_qtstart): Update.
	* linux-low.cc (linux_target_ops): Update.
	(linux_stabilize_threads): Turn into ...
	(linux_process_target::stabilize_threads): ... this.
	(linux_wait_1): Update.
	* linux-low.h (class linux_process_target): Update.
	* lynx-low.cc (lynx_target_ops): Update.
	* nto-low.cc (nto_target_ops): Update.
	* win32-low.cc (win32_target_ops): Update.
---
 gdbserver/linux-low.cc  |  9 ++++-----
 gdbserver/linux-low.h   |  2 ++
 gdbserver/lynx-low.cc   |  1 -
 gdbserver/nto-low.cc    |  1 -
 gdbserver/server.cc     |  2 +-
 gdbserver/target.cc     |  6 ++++++
 gdbserver/target.h      | 14 +++++---------
 gdbserver/tracepoint.cc |  4 ++--
 gdbserver/win32-low.cc  |  1 -
 9 files changed, 20 insertions(+), 20 deletions(-)

diff --git a/gdbserver/linux-low.cc b/gdbserver/linux-low.cc
index 97a8aa46f5a..aa255cb0f47 100644
--- a/gdbserver/linux-low.cc
+++ b/gdbserver/linux-low.cc
@@ -1620,7 +1620,7 @@ linux_process_target::detach (process_info *process)
 #endif
 
   /* Stabilize threads (move out of jump pads).  */
-  stabilize_threads ();
+  target_stabilize_threads ();
 
   /* Detach from the clone lwps first.  If the thread group exits just
      while we're detaching, we must reap the clone lwps before we're
@@ -2926,8 +2926,8 @@ static ptid_t linux_wait_1 (ptid_t ptid,
    since for something else in the new run, the thread would now
    execute the wrong / random instructions.  */
 
-static void
-linux_stabilize_threads (void)
+void
+linux_process_target::stabilize_threads ()
 {
   thread_info *thread_stuck = find_thread (stuck_in_jump_pad_callback);
 
@@ -3713,7 +3713,7 @@ linux_wait_1 (ptid_t ptid,
 
       /* Stabilize threads (move out of jump pads).  */
       if (!non_stop)
-	stabilize_threads ();
+	target_stabilize_threads ();
     }
   else
     {
@@ -7451,7 +7451,6 @@ linux_get_hwcap2 (int wordsize)
 static linux_process_target the_linux_target;
 
 static process_stratum_target linux_target_ops = {
-  linux_stabilize_threads,
   linux_install_fast_tracepoint_jump_pad,
   linux_emit_ops,
   linux_supports_disable_randomization,
diff --git a/gdbserver/linux-low.h b/gdbserver/linux-low.h
index e5d54c5e08d..d3866de03a2 100644
--- a/gdbserver/linux-low.h
+++ b/gdbserver/linux-low.h
@@ -400,6 +400,8 @@ public:
   void pause_all (bool freeze) override;
 
   void unpause_all (bool unfreeze) override;
+
+  void stabilize_threads () override;
 };
 
 #define get_thread_lwp(thr) ((struct lwp_info *) (thread_target_data (thr)))
diff --git a/gdbserver/lynx-low.cc b/gdbserver/lynx-low.cc
index 92c086d97c3..5ea50b4415d 100644
--- a/gdbserver/lynx-low.cc
+++ b/gdbserver/lynx-low.cc
@@ -735,7 +735,6 @@ static lynx_process_target the_lynx_target;
 /* The LynxOS target_ops vector.  */
 
 static process_stratum_target lynx_target_ops = {
-  NULL,  /* stabilize_threads */
   NULL,  /* install_fast_tracepoint_jump_pad */
   NULL,  /* emit_ops */
   NULL,  /* supports_disable_randomization */
diff --git a/gdbserver/nto-low.cc b/gdbserver/nto-low.cc
index ee411a1e375..ef7a70ad97a 100644
--- a/gdbserver/nto-low.cc
+++ b/gdbserver/nto-low.cc
@@ -947,7 +947,6 @@ nto_sw_breakpoint_from_kind (int kind, int *size)
 static nto_process_target the_nto_target;
 
 static process_stratum_target nto_target_ops = {
-  NULL, /* stabilize_threads */
   NULL, /* install_fast_tracepoint_jump_pad */
   NULL, /* emit_ops */
   NULL, /* supports_disable_randomization */
diff --git a/gdbserver/server.cc b/gdbserver/server.cc
index 670c0fed968..448089fd47c 100644
--- a/gdbserver/server.cc
+++ b/gdbserver/server.cc
@@ -3324,7 +3324,7 @@ handle_status (char *own_buf)
       thread_info *thread = NULL;
 
       target_pause_all (false);
-      stabilize_threads ();
+      target_stabilize_threads ();
       gdb_wants_all_threads_stopped ();
 
       /* We can only report one status, but we might be coming out of
diff --git a/gdbserver/target.cc b/gdbserver/target.cc
index 912f4b8bdad..42f22846d02 100644
--- a/gdbserver/target.cc
+++ b/gdbserver/target.cc
@@ -662,3 +662,9 @@ process_target::unpause_all (bool unfreeze)
 {
   /* Nop.  */
 }
+
+void
+process_target::stabilize_threads ()
+{
+  /* Nop.  */
+}
diff --git a/gdbserver/target.h b/gdbserver/target.h
index 60fb14f69e6..c56267fb1f8 100644
--- a/gdbserver/target.h
+++ b/gdbserver/target.h
@@ -70,9 +70,6 @@ class process_target;
    shared code.  */
 struct process_stratum_target
 {
-  /* Stabilize all threads.  That is, force them out of jump pads.  */
-  void (*stabilize_threads) (void);
-
   /* Install a fast tracepoint jump pad.  TPOINT is the address of the
      tracepoint internal object as used by the IPA agent.  TPADDR is
      the address of tracepoint.  COLLECTOR is address of the function
@@ -494,6 +491,9 @@ public:
      pair should not end up resuming threads that were stopped before
      the pause call.  */
   virtual void unpause_all (bool unfreeze);
+
+  /* Stabilize all threads.  That is, force them out of jump pads.  */
+  virtual void stabilize_threads ();
 };
 
 extern process_stratum_target *the_target;
@@ -574,12 +574,8 @@ int kill_inferior (process_info *proc);
 #define target_unpause_all(unfreeze)		\
   the_target->pt->unpause_all (unfreeze)
 
-#define stabilize_threads()			\
-  do						\
-    {						\
-      if (the_target->stabilize_threads)     	\
-	(*the_target->stabilize_threads) ();  	\
-    } while (0)
+#define target_stabilize_threads()		\
+  the_target->pt->stabilize_threads ()
 
 #define install_fast_tracepoint_jump_pad(tpoint, tpaddr,		\
 					 collector, lockaddr,		\
diff --git a/gdbserver/tracepoint.cc b/gdbserver/tracepoint.cc
index ffa819cf24e..be40c9b4cf1 100644
--- a/gdbserver/tracepoint.cc
+++ b/gdbserver/tracepoint.cc
@@ -2606,7 +2606,7 @@ cmd_qtdp (char *own_buf)
 
       /* download_tracepoint will update global `tracepoints'
 	 list, so it is unsafe to leave threads in jump pad.  */
-      stabilize_threads ();
+      target_stabilize_threads ();
 
       /* Freeze threads.  */
       target_pause_all (true);
@@ -3226,7 +3226,7 @@ cmd_qtstart (char *packet)
      top level command.  And, required to do here, since we're
      deleting/rewriting jump pads.  */
 
-  stabilize_threads ();
+  target_stabilize_threads ();
 
   /* Freeze threads.  */
   target_pause_all (true);
diff --git a/gdbserver/win32-low.cc b/gdbserver/win32-low.cc
index a06cea22fc8..8e0be15fdaf 100644
--- a/gdbserver/win32-low.cc
+++ b/gdbserver/win32-low.cc
@@ -1858,7 +1858,6 @@ win32_sw_breakpoint_from_kind (int kind, int *size)
 static win32_process_target the_win32_target;
 
 static process_stratum_target win32_target_ops = {
-  NULL, /* stabilize_threads */
   NULL, /* install_fast_tracepoint_jump_pad */
   NULL, /* emit_ops */
   NULL, /* supports_disable_randomization */
-- 
2.17.1