* stabsread.c (get_substring): Declare second arg as int.

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

diff --git a/gdb/corefile.c b/gdb/corefile.c
index a916bf8ac8134285540b087335cd4589d92b756e..65ea357db971a376a6697b145f686858fde39b9f 100644 (file)
--- a/gdb/corefile.c
+++ b/gdb/corefile.c
@@ -36,9 +36,23 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
 
 extern char registers[];
 
-/* Hook for `exec_file_command' command to call.  */
+/* Local function declarations.  */
 
-void (*exec_file_display_hook) PARAMS ((char *)) = NULL;
+static void call_extra_exec_file_hooks PARAMS ((char *filename));
+
+/* You can have any number of hooks for `exec_file_command' command to call.
+   If there's only one hook, it is set in exec_file_display hook.
+   If there are two or more hooks, they are set in exec_file_extra_hooks[],
+   and exec_file_display_hook is set to a function that calls all of them.
+   This extra complexity is needed to preserve compatibility with
+   old code that assumed that only one hook could be set, and which called
+   exec_file_display_hook directly.  */
+
+typedef void (*hook_type) PARAMS ((char *));
+
+hook_type exec_file_display_hook;              /* the original hook */
+static hook_type *exec_file_extra_hooks;       /* array of additional hooks */
+static int exec_file_hook_count = 0;           /* size of array */
 
 /* Binary file diddling handle for the core file.  */
 
@@ -67,6 +81,19 @@ core_file_command (filename, from_tty)
 }
 
 \f
+/* If there are two or more functions that wish to hook into exec_file_command,
+ * this function will call all of the hook functions. */
+
+static void
+call_extra_exec_file_hooks (filename)
+     char *filename;
+{
+  int i;
+
+  for (i = 0; i < exec_file_hook_count; i++)
+    (*exec_file_extra_hooks[i])(filename);
+}
+
 /* Call this to specify the hook for exec_file_command to call back.
    This is called from the x-window display code.  */
 
@@ -74,7 +101,33 @@ void
 specify_exec_file_hook (hook)
      void (*hook) PARAMS ((char *));
 {
-  exec_file_display_hook = hook;
+  hook_type *new_array;
+
+  if (exec_file_display_hook != NULL)
+    {
+      /* There's already a hook installed.  Arrange to have both it
+       * and the subsequent hooks called. */
+      if (exec_file_hook_count == 0)
+       {
+         /* If this is the first extra hook, initialize the hook array. */
+         exec_file_extra_hooks = (hook_type *) xmalloc (sizeof(hook_type));
+         exec_file_extra_hooks[0] = exec_file_display_hook;
+         exec_file_display_hook = call_extra_exec_file_hooks;
+         exec_file_hook_count = 1;
+       }
+
+      /* Grow the hook array by one and add the new hook to the end.
+         Yes, it's inefficient to grow it by one each time but since
+         this is hardly ever called it's not a big deal.  */
+      exec_file_hook_count++;
+      new_array =
+       (hook_type *) xrealloc (exec_file_extra_hooks,
+                               exec_file_hook_count * sizeof(hook_type));
+      exec_file_extra_hooks = new_array;
+      exec_file_extra_hooks[exec_file_hook_count - 1] = hook;
+    }
+  else
+    exec_file_display_hook = hook;
 }
 
 /* The exec file must be closed before running an inferior.