2008-10-06 Michael Snyder <msnyder@vmware.com>

	* infrun.c (step_into_function): Rename to stepped_into_function.
	Split into two versions (normal (forward), and reverse).
	(handle_inferior_event): Call stepped_into_function or
	stepped_into_function_backward, depending on exec_direction.

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 84573bc71a9ee7630ccd769fc3e0a4ef99f493f7..91dbce8228f0a3d46e2900bd125ee3f9d875603c 100644 (file)
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,5 +1,9 @@
 2008-10-06  Michael Snyder  <msnyder@vmware.com>
 
+       * infrun.c (step_into_function): Rename to stepped_into_function.
+       Split into two versions (normal (forward), and reverse).
+       (handle_inferior_event): Call stepped_into_function or
+       stepped_into_function_backward, depending on exec_direction.
        * infrun.c (handle_inferior_event): Comment rewording.
        * remote.c (remote_get_exec_direction): Use i18n macros.
        (remote_set_exec_direction): Ditto.

diff --git a/gdb/infrun.c b/gdb/infrun.c
index b4651d932ccb741d2ad1e02572d6072120ca9f0b..09a29b97ca85bdb827abfaf02afdae2fee240df2 100644 (file)
--- a/gdb/infrun.c
+++ b/gdb/infrun.c
@@ -1472,7 +1472,8 @@ void init_execution_control_state (struct execution_control_state *ecs);
 
 void handle_inferior_event (struct execution_control_state *ecs);
 
-static void step_into_function (struct execution_control_state *ecs);
+static void stepped_into_function (struct execution_control_state *ecs);
+static void stepped_into_function_backward (struct execution_control_state *ecs);
 static void insert_step_resume_breakpoint_at_frame (struct frame_info *step_frame);
 static void insert_step_resume_breakpoint_at_caller (struct frame_info *);
 static void insert_step_resume_breakpoint_at_sal (struct symtab_and_line sr_sal,
@@ -3247,7 +3248,13 @@ infrun: BPSTAT_WHAT_SET_LONGJMP_RESUME (!gdbarch_get_longjmp_target)\n");
        tmp_sal = find_pc_line (ecs->stop_func_start, 0);
        if (tmp_sal.line != 0)
          {
-           step_into_function (ecs);
+           /* Find start of appropriate source line (either first or
+              last line in callee, depending on execution
+              direction).  */
+           if (target_get_execution_direction () == EXEC_REVERSE)
+             stepped_into_function_backward (ecs);
+           else
+             stepped_into_function (ecs);
            return;
          }
       }
@@ -3580,42 +3587,21 @@ currently_stepping (struct thread_stepping_state *tss)
          || reverse_resume_need_step);
 }
 
-/* Subroutine call with source code we should not step over.  Do step
-   to the first line of code in it.  */
-
-static void
-step_into_function (struct execution_control_state *ecs)
+/* Inferior has stepped into a subroutine call with source code that
+   we should not step over.  Do step to the first line of code in
+   it.  */
+  
+  static void
+stepped_into_function (struct execution_control_state *ecs)
 {
   struct symtab *s;
   struct symtab_and_line stop_func_sal, sr_sal;
 
   s = find_pc_symtab (stop_pc);
   if (s && s->language != language_asm)
-    ecs->stop_func_start = gdbarch_skip_prologue
-                            (current_gdbarch, ecs->stop_func_start);
-
-  if (target_get_execution_direction () == EXEC_REVERSE)
-    {
-      stop_func_sal = find_pc_line (stop_pc, 0);
+    ecs->stop_func_start = gdbarch_skip_prologue (current_gdbarch, 
+                                                 ecs->stop_func_start);
 
-      /* OK, we're just going to keep stepping here.  */
-      if (stop_func_sal.pc == stop_pc)
-       {
-         /* We're there already.  Just stop stepping now.  */
-         stop_step = 1;
-         print_stop_reason (END_STEPPING_RANGE, 0);
-         stop_stepping (ecs);
-         return;
-       }
-      /* Else just reset the step range and keep going.
-        No step-resume breakpoint, they don't work for
-        epilogues, which can have multiple entry paths.  */
-      step_range_start = stop_func_sal.pc;
-      step_range_end = stop_func_sal.end;
-      keep_going (ecs);
-      return;
-    }
-  /* else... */
   stop_func_sal = find_pc_line (ecs->stop_func_start, 0);
   /* Use the step_resume_break to step until the end of the prologue,
      even if that involves jumps (as it seems to on the vax under
@@ -3677,6 +3663,43 @@ step_into_function (struct execution_control_state *ecs)
   keep_going (ecs);
 }
 
+/* Inferior has stepped backward into a subroutine call with source
+   code that we should not step over.  Do step to the beginning of the
+   last line of code in it.  */
+
+static void
+stepped_into_function_backward (struct execution_control_state *ecs)
+{
+  struct symtab *s;
+  struct symtab_and_line stop_func_sal, sr_sal;
+
+  s = find_pc_symtab (stop_pc);
+  if (s && s->language != language_asm)
+    ecs->stop_func_start = gdbarch_skip_prologue (current_gdbarch, 
+                                                 ecs->stop_func_start);
+
+  stop_func_sal = find_pc_line (stop_pc, 0);
+
+  /* OK, we're just going to keep stepping here.  */
+  if (stop_func_sal.pc == stop_pc)
+    {
+      /* We're there already.  Just stop stepping now.  */
+      stop_step = 1;
+      print_stop_reason (END_STEPPING_RANGE, 0);
+      stop_stepping (ecs);
+    }
+  else
+    {
+      /* Else just reset the step range and keep going.
+        No step-resume breakpoint, they don't work for
+        epilogues, which can have multiple entry paths.  */
+      step_range_start = stop_func_sal.pc;
+      step_range_end = stop_func_sal.end;
+      keep_going (ecs);
+    }
+  return;
+}
+
 /* Insert a "step-resume breakpoint" at SR_SAL with frame ID SR_ID.
    This is used to both functions and to skip over code.  */