2011-10-06 Justin Lebar <justin.lebar@gmail.com>

[deliverable/binutils-gdb.git] / gdb / stack.c

diff --git a/gdb/stack.c b/gdb/stack.c
index 003725a72529911ec4aea3cef3261d45f6d92c1b..9136daa3f15679ff9385755dc019df00da3a08c9 100644 (file)
--- a/gdb/stack.c
+++ b/gdb/stack.c
@@ -96,6 +96,12 @@ static void print_frame (struct frame_info *frame, int print_level,
                         enum print_what print_what,  int print_args,
                         struct symtab_and_line sal);
 
+static void set_last_displayed_sal (int valid,
+                                   struct program_space *pspace,
+                                   CORE_ADDR addr,
+                                   struct symtab *symtab,
+                                   int line);
+
 /* Zero means do things normally; we are interacting directly with the
    user.  One means print the full filename and linenumber when a
    frame is printed, and do so in a format emacs18/emacs19.22 can
@@ -103,6 +109,14 @@ static void print_frame (struct frame_info *frame, int print_level,
    cases and in a slightly different syntax.  */
 
 int annotation_level = 0;
+
+/* These variables hold the last symtab and line we displayed to the user.
+ * This is where we insert a breakpoint or a skiplist entry by default.  */
+static int last_displayed_sal_valid = 0;
+static struct program_space *last_displayed_pspace = 0;
+static CORE_ADDR last_displayed_addr = 0;
+static struct symtab *last_displayed_symtab = 0;
+static int last_displayed_line = 0;
 \f
 
 /* Return 1 if we should display the address in addition to the location,
@@ -872,9 +886,9 @@ print_frame_info (struct frame_info *frame, int print_level,
       CORE_ADDR pc;
 
       if (get_frame_pc_if_available (frame, &pc))
-       set_default_breakpoint (1, sal.pspace, pc, sal.symtab, sal.line);
+       set_last_displayed_sal (1, sal.pspace, pc, sal.symtab, sal.line);
       else
-       set_default_breakpoint (0, 0, 0, 0, 0);
+       set_last_displayed_sal (0, 0, 0, 0, 0);
     }
 
   annotate_frame_end ();
@@ -882,6 +896,106 @@ print_frame_info (struct frame_info *frame, int print_level,
   gdb_flush (gdb_stdout);
 }
 
+/* Remember the last symtab and line we displayed, which we use e.g.
+ * as the place to put a breakpoint when the `break' command is
+ * invoked with no arguments.  */
+
+static void
+set_last_displayed_sal (int valid, struct program_space *pspace,
+                       CORE_ADDR addr, struct symtab *symtab,
+                       int line)
+{
+  last_displayed_sal_valid = valid;
+  last_displayed_pspace = pspace;
+  last_displayed_addr = addr;
+  last_displayed_symtab = symtab;
+  last_displayed_line = line;
+}
+
+/* Forget the last sal we displayed.  */
+
+void
+clear_last_displayed_sal (void)
+{
+  last_displayed_sal_valid = 0;
+  last_displayed_pspace = 0;
+  last_displayed_addr = 0;
+  last_displayed_symtab = 0;
+  last_displayed_line = 0;
+}
+
+/* Is our record of the last sal we displayed valid?  If not,
+ * the get_last_displayed_* functions will return NULL or 0, as
+ * appropriate.  */
+
+int
+last_displayed_sal_is_valid (void)
+{
+  return last_displayed_sal_valid;
+}
+
+/* Get the pspace of the last sal we displayed, if it's valid.  */
+
+struct program_space *
+get_last_displayed_pspace (void)
+{
+  if (last_displayed_sal_valid)
+    return last_displayed_pspace;
+  return 0;
+}
+
+/* Get the address of the last sal we displayed, if it's valid.  */
+
+CORE_ADDR
+get_last_displayed_addr (void)
+{
+  if (last_displayed_sal_valid)
+    return last_displayed_addr;
+  return 0;
+}
+
+/* Get the symtab of the last sal we displayed, if it's valid.  */
+
+struct symtab*
+get_last_displayed_symtab (void)
+{
+  if (last_displayed_sal_valid)
+    return last_displayed_symtab;
+  return 0;
+}
+
+/* Get the line of the last sal we displayed, if it's valid.  */
+
+int
+get_last_displayed_line (void)
+{
+  if (last_displayed_sal_valid)
+    return last_displayed_line;
+  return 0;
+}
+
+/* Get the last sal we displayed, if it's valid.  */
+
+void
+get_last_displayed_sal (struct symtab_and_line *sal)
+{
+  if (last_displayed_sal_valid)
+    {
+      sal->pspace = last_displayed_pspace;
+      sal->pc = last_displayed_addr;
+      sal->symtab = last_displayed_symtab;
+      sal->line = last_displayed_line;
+    }
+  else
+    {
+      sal->pspace = 0;
+      sal->pc = 0;
+      sal->symtab = 0;
+      sal->line = 0;
+    }
+}
+
+
 /* Attempt to obtain the FUNNAME, FUNLANG and optionally FUNCP of the function
    corresponding to FRAME.  */