linux_nat_target: More low methods

This converts the remaining linux-nat.c hooks low_ methods like had
been started in a previous patch.  The linux_nat_set_foo routines are
all gone with this.

gdb/ChangeLog:
2018-05-02  Pedro Alves  <palves@redhat.com>

	* linux-nat.h (linux_nat_target) <low_new_thread,
	low_delete_thread, low_new_fork, low_forget_process,
	low_prepare_to_resume, low_siginfo_fixup, low_status_is_event>:
	New virtual methods.
	(linux_nat_set_new_thread, linux_nat_set_delete_thread)
	(linux_nat_new_fork_ftype, linux_nat_set_new_fork)
	(linux_nat_forget_process_ftype, linux_nat_set_forget_process)
	(linux_nat_forget_process, linux_nat_set_siginfo_fixup)
	(linux_nat_set_prepare_to_resume, linux_nat_set_status_is_event):
	Delete.
	* linux-fork.c (delete_fork): Adjust to call low method.
	* linux-nat.c (linux_nat_new_thread, linux_nat_delete_thread)
	(linux_nat_new_fork, linux_nat_forget_process_hook)
	(linux_nat_prepare_to_resume, linux_nat_siginfo_fixup)
	(linux_nat_status_is_event):
	(linux_nat_target::follow_fork, lwp_free, add_lwp, detach_one_lwp)
	(linux_resume_one_lwp_throw, linux_handle_extended_wait): Adjust
	to call low method.
	(sigtrap_is_event): Rename to ...
	(linux_nat_target::low_status_is_event): ... this.
	(linux_nat_set_status_is_event): Delete.
	(save_stop_reason, linux_nat_wait_1)
	(linux_nat_target::mourn_inferior, siginfo_fixup): Adjust to call
	low methods.
	(linux_nat_set_new_thread, linux_nat_set_delete_thread)
	(linux_nat_set_new_fork, linux_nat_set_forget_process)
	(linux_nat_forget_process, linux_nat_set_siginfo_fixup)
	(linux_nat_set_prepare_to_resume): Delete.
	* aarch64-linux-nat.c: All linux_nat_set_* callbacks converted to
	low virtual methods.
	* amd64-linux-nat.c: Likewise.
	* arm-linux-nat.c: Likewise.
	* i386-linux-nat.c: Likewise.
	* ia64-linux-nat.c: Likewise.
	* mips-linux-nat.c: Likewise.
	* ppc-linux-nat.c: Likewise.
	* s390-linux-nat.c: Likewise.
	* sparc64-linux-nat.c: Likewise.
	* x86-linux-nat.c: Likewise.
	* x86-linux-nat.h: Include "nat/x86-linux.h".
	(x86_linux_nat_target) <low_new_fork, low_forget_process,
	low_prepare_to_resume, low_new_thread, low_delete_thread>:
	Override methods.

1 files changed, 17 insertions, 15 deletions

diff --git a/gdb/s390-linux-nat.c b/gdb/s390-linux-nat.c
index 8dd8bc0..7d17e9d 100644
--- a/gdb/s390-linux-nat.c
+++ b/gdb/s390-linux-nat.c
@@ -135,6 +135,13 @@ public:
   int auxv_parse (gdb_byte **readptr,
 		  gdb_byte *endptr, CORE_ADDR *typep, CORE_ADDR *valp)
     override;
+
+  /* Override linux_nat_target low methods.  */
+  void low_new_thread (struct lwp_info *lp) override;
+  void low_delete_thread (struct arch_lwp_info *lp) override;
+  void low_prepare_to_resume (struct lwp_info *lp) override;
+  void low_new_fork (struct lwp_info *parent, pid_t child_pid) override;
+  void low_forget_process (pid_t pid) override;
 };
 
 static s390_linux_nat_target the_s390_linux_nat_target;
@@ -575,8 +582,8 @@ s390_get_debug_reg_state (pid_t pid)
 /* Called whenever GDB is no longer debugging process PID.  It deletes
    data structures that keep track of hardware debug state.  */
 
-static void
-s390_forget_process (pid_t pid)
+void
+s390_linux_nat_target::low_forget_process (pid_t pid)
 {
   struct s390_process_info *proc, **proc_link;
 
@@ -601,8 +608,8 @@ s390_forget_process (pid_t pid)
 
 /* linux_nat_new_fork hook.   */
 
-static void
-s390_linux_new_fork (struct lwp_info *parent, pid_t child_pid)
+void
+s390_linux_nat_target::low_new_fork (struct lwp_info *parent, pid_t child_pid)
 {
   pid_t parent_pid;
   struct s390_debug_reg_state *parent_state;
@@ -694,8 +701,8 @@ s390_linux_nat_target::stopped_by_watchpoint ()
 
 /* Each time before resuming a thread, update its PER info.  */
 
-static void
-s390_prepare_to_resume (struct lwp_info *lp)
+void
+s390_linux_nat_target::low_prepare_to_resume (struct lwp_info *lp)
 {
   int tid;
   pid_t pid = ptid_get_pid (ptid_of_lwp (lp));
@@ -811,16 +818,16 @@ s390_mark_per_info_changed (struct lwp_info *lp)
 
 /* When attaching to a new thread, mark its PER info as changed.  */
 
-static void
-s390_new_thread (struct lwp_info *lp)
+void
+s390_linux_nat_target::low_new_thread (struct lwp_info *lp)
 {
   s390_mark_per_info_changed (lp);
 }
 
 /* Function to call when a thread is being deleted.  */
 
-static void
-s390_delete_thread (struct arch_lwp_info *arch_lwp)
+void
+s390_linux_nat_target::low_delete_thread (struct arch_lwp_info *arch_lwp)
 {
   xfree (arch_lwp);
 }
@@ -1063,11 +1070,6 @@ _initialize_s390_nat (void)
   /* Register the target.  */
   linux_target = &the_s390_linux_nat_target;
   add_target (t);
-  linux_nat_set_new_thread (t, s390_new_thread);
-  linux_nat_set_delete_thread (t, s390_delete_thread);
-  linux_nat_set_prepare_to_resume (t, s390_prepare_to_resume);
-  linux_nat_set_forget_process (t, s390_forget_process);
-  linux_nat_set_new_fork (t, s390_linux_new_fork);
 
   /* A maintenance command to enable showing the PER state.  */
   add_setshow_boolean_cmd ("show-debug-regs", class_maintenance,