[ob] Garbage collect through_sigtramp_breakpoint

[Andrew Cagney <cagney at gnu dot org>]

GDB goes through all this effort to preserve a variable that isn't used.

committed,
Andrew

2004-05-10  Andrew Cagney  <cagney@redhat.com>

	* infrun.c (through_sigtramp_breakpoint): Delete variable.
	(context_switch): Do not switch through_sigtramp_breakpoint.
	* gdbthread.h (save_infrun_state, load_infrun_state)
	(struct thread_info): Delete through_sigtramp_breakpoint parameter
	and structure member.
	* thread.c (load_infrun_state, save_infrun_state): Update.

Index: gdbthread.h
===================================================================
RCS file: /cvs/src/src/gdb/gdbthread.h,v
retrieving revision 1.9
diff -p -u -r1.9 gdbthread.h
--- gdbthread.h	5 May 2003 00:27:07 -0000	1.9
+++ gdbthread.h	10 May 2004 23:24:29 -0000
@@ -45,7 +45,6 @@ struct thread_info
   /* State from wait_for_inferior */
   CORE_ADDR prev_pc;
   struct breakpoint *step_resume_breakpoint;
-  struct breakpoint *through_sigtramp_breakpoint;
   CORE_ADDR step_range_start;
   CORE_ADDR step_range_end;
   struct frame_id step_frame_id;
@@ -118,7 +117,6 @@ extern void save_infrun_state (ptid_t pt
 			       CORE_ADDR prev_pc,
 			       int       trap_expected,
 			       struct breakpoint *step_resume_breakpoint,
-			       struct breakpoint *through_sigtramp_breakpoint,
 			       CORE_ADDR step_range_start,
 			       CORE_ADDR step_range_end,
 			       const struct frame_id *step_frame_id,
@@ -137,7 +135,6 @@ extern void load_infrun_state (ptid_t pt
 			       CORE_ADDR *prev_pc,
 			       int       *trap_expected,
 			       struct breakpoint **step_resume_breakpoint,
-			       struct breakpoint **through_sigtramp_breakpoint,
 			       CORE_ADDR *step_range_start,
 			       CORE_ADDR *step_range_end,
 			       struct frame_id *step_frame_id,
Index: infrun.c
===================================================================
RCS file: /cvs/src/src/gdb/infrun.c,v
retrieving revision 1.153
diff -p -u -r1.153 infrun.c
--- infrun.c	10 May 2004 18:36:06 -0000	1.153
+++ infrun.c	10 May 2004 23:24:29 -0000
@@ -303,9 +303,6 @@ static int breakpoints_failed;
 static int stop_print_frame;
 
 static struct breakpoint *step_resume_breakpoint = NULL;
-/* NOTE: cagney/2004-05-08: This variable needs to be garbage
-   collected, it isn't used.  */
-static struct breakpoint *through_sigtramp_breakpoint = NULL;
 
 /* On some platforms (e.g., HP-UX), hardware watchpoints have bad
    interactions with an inferior that is running a kernel function
@@ -1159,7 +1156,7 @@ context_switch (struct execution_control
       /* Save infrun state for the old thread.  */
       save_infrun_state (inferior_ptid, prev_pc,
 			 trap_expected, step_resume_breakpoint,
-			 through_sigtramp_breakpoint, step_range_start,
+			 step_range_start,
 			 step_range_end, &step_frame_id,
 			 ecs->handling_longjmp, ecs->another_trap,
 			 ecs->stepping_through_solib_after_catch,
@@ -1170,7 +1167,7 @@ context_switch (struct execution_control
       /* Load infrun state for the new thread.  */
       load_infrun_state (ecs->ptid, &prev_pc,
 			 &trap_expected, &step_resume_breakpoint,
-			 &through_sigtramp_breakpoint, &step_range_start,
+			 &step_range_start,
 			 &step_range_end, &step_frame_id,
 			 &ecs->handling_longjmp, &ecs->another_trap,
 			 &ecs->stepping_through_solib_after_catch,
Index: thread.c
===================================================================
RCS file: /cvs/src/src/gdb/thread.c,v
retrieving revision 1.34
diff -p -u -r1.34 thread.c
--- thread.c	2 May 2004 00:21:41 -0000	1.34
+++ thread.c	10 May 2004 23:24:30 -0000
@@ -294,7 +294,6 @@ load_infrun_state (ptid_t ptid,
 		   CORE_ADDR *prev_pc,
 		   int *trap_expected,
 		   struct breakpoint **step_resume_breakpoint,
-		   struct breakpoint **through_sigtramp_breakpoint,
 		   CORE_ADDR *step_range_start,
 		   CORE_ADDR *step_range_end,
 		   struct frame_id *step_frame_id,
@@ -317,7 +316,6 @@ load_infrun_state (ptid_t ptid,
   *prev_pc = tp->prev_pc;
   *trap_expected = tp->trap_expected;
   *step_resume_breakpoint = tp->step_resume_breakpoint;
-  *through_sigtramp_breakpoint = tp->through_sigtramp_breakpoint;
   *step_range_start = tp->step_range_start;
   *step_range_end = tp->step_range_end;
   *step_frame_id = tp->step_frame_id;
@@ -340,7 +338,6 @@ save_infrun_state (ptid_t ptid,
 		   CORE_ADDR prev_pc,
 		   int trap_expected,
 		   struct breakpoint *step_resume_breakpoint,
-		   struct breakpoint *through_sigtramp_breakpoint,
 		   CORE_ADDR step_range_start,
 		   CORE_ADDR step_range_end,
 		   const struct frame_id *step_frame_id,
@@ -363,7 +360,6 @@ save_infrun_state (ptid_t ptid,
   tp->prev_pc = prev_pc;
   tp->trap_expected = trap_expected;
   tp->step_resume_breakpoint = step_resume_breakpoint;
-  tp->through_sigtramp_breakpoint = through_sigtramp_breakpoint;
   tp->step_range_start = step_range_start;
   tp->step_range_end = step_range_end;
   tp->step_frame_id = (*step_frame_id);