From 3950a34e45858c6f5a33e94b71832febc282eae3 Mon Sep 17 00:00:00 2001
From: "K. Richard Pixley" <rich@cygnus>
Date: Tue, 6 Oct 1992 22:54:57 +0000
Subject: NOTICE_SIGNAL_HANDLING_CHANGE macro added to the target vector as
 to_notice_signals.

* inferior.h (proc_signal_handling_change): prototype removed.
* infrun.c (NOTICE_SIGNAL_HANDLING_CHANGE): default removed.
(handle_command): now calls target_notice_signals.
* procfs.c (proc_signal_handling_change): renamed to
  procfs_notice_signals.  Now static.  Add prototype.  All callers
  changed.
* target.h (struct target_ops): new field, to_notice_signals.
(target_notice_signals): new macro to cover new field.
* target.c (cleanup_target): default to_notice_signals to ignore.
* corelow.c (core_ops),
exec.c (exec_ops),
inftarg.c (child_ops),
procfs.c (procfs_ops),
remote-adapt.c (adapt-ops),
remote-eb.c (eb_ops),
remote-es1800.c (es1800_ops, es1800_child_ops),
remote-hms.c (hms_ops),
remote-mm.c (mm_ops),
remote-nindy.c (nindy_ops),
remote-st2000.c (st2000_ops),
remote-udi.c (udi_ops),
remote-vx.c (vx_ops, vx_run_ops),
remote.c (remote_ops),
target.c (dummy_target),
xcoffexec.c (exec_ops): added static initializer for
to_notice_signals.
* xm-irix4.h, xm-sysv4.h (NOTICE_SIGNAL_HANDLING_CHANGE): removed.
---
 gdb/infrun.c | 45 +++++++++++++++++++++++++++++++++++----------
 1 file changed, 35 insertions(+), 10 deletions(-)

(limited to 'gdb/infrun.c')

diff --git a/gdb/infrun.c b/gdb/infrun.c
index 8a01acf..de2ad56 100644
--- a/gdb/infrun.c
+++ b/gdb/infrun.c
@@ -109,7 +109,7 @@ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */
 #include "breakpoint.h"
 #include "wait.h"
 #include "gdbcore.h"
-#include "command.h"
+#include "gdbcmd.h"
 #include "target.h"
 
 #include <signal.h>
@@ -144,6 +144,9 @@ insert_step_breakpoint PARAMS ((void));
 static void
 resume_cleanups PARAMS ((int));
 
+static int
+hook_stop_stub PARAMS ((char *));
+
 /* Sigtramp is a routine that the kernel calls (which then calls the
    signal handler).  On most machines it is a library routine that
    is linked into the executable.
@@ -182,12 +185,6 @@ resume_cleanups PARAMS ((int));
 #define IN_SOLIB_TRAMPOLINE(pc,name)	0
 #endif
 
-/* Notify other parts of gdb that might care that signal handling may
-   have changed for one or more signals. */
-#ifndef NOTICE_SIGNAL_HANDLING_CHANGE
-#define NOTICE_SIGNAL_HANDLING_CHANGE	/* No actions */
-#endif
-
 #ifdef TDESC
 #include "tdesc.h"
 int safe_to_init_tdesc_context = 0;
@@ -216,10 +213,14 @@ static unsigned char *signal_program;
 	(flags)[signum] = 0; \
   } while (0)
 
+
+/* Command list pointer for the "stop" placeholder.  */
+
+static struct cmd_list_element *stop_command;
+
 /* Nonzero if breakpoints are now inserted in the inferior.  */
-/* Nonstatic for initialization during xxx_create_inferior. FIXME. */
 
-/*static*/ int breakpoints_inserted;
+static int breakpoints_inserted;
 
 /* Function inferior was in as of last step command.  */
 
@@ -1196,6 +1197,9 @@ save_pc:
 void
 normal_stop ()
 {
+  char *tem;
+  struct cmd_list_element *c;
+
   /* Make sure that the current_frame's pc is correct.  This
      is a correction for setting up the frame info before doing
      DECR_PC_AFTER_BREAK */
@@ -1240,6 +1244,14 @@ Further execution is probably impossible.\n");
 
   target_terminal_ours ();
 
+  /* Look up the hook_stop and run it if it exists.  */
+
+  if (stop_command->hook)
+    {
+      catch_errors (hook_stop_stub, (char *)stop_command->hook,
+		    "Error while running hook_stop:\n");
+    }
+
   if (!target_has_stack)
     return;
 
@@ -1282,6 +1294,14 @@ Further execution is probably impossible.\n");
       select_frame (get_current_frame (), 0);
     }
 }
+
+static int
+hook_stop_stub (cmd)
+     char *cmd;
+{
+  execute_user_command ((struct cmd_list_element *)cmd, 0);
+}
+
 
 static void
 insert_step_breakpoint ()
@@ -1492,7 +1512,7 @@ handle_command (args, from_tty)
       argv++;
     }
 
-  NOTICE_SIGNAL_HANDLING_CHANGE;
+  target_notice_signals();
 
   if (from_tty)
     {
@@ -1674,6 +1694,11 @@ Pass means let program see this signal; otherwise program doesn't know.\n\
 Ignore is a synonym for nopass and noignore is a synonym for pass.\n\
 Pass and Stop may be combined.");
 
+  stop_command = add_cmd ("stop", class_pseudo, NO_FUNCTION,
+	   "There is no `stop' command, but you can set a hook on `stop'.\n\
+This allows you to set a list of commands to be run each time execution\n\
+of the inferior program stops.", &cmdlist);
+
   numsigs = signo_max () + 1;
   signal_stop    = (unsigned char *)    
 		   xmalloc (sizeof (signal_stop[0]) * numsigs);
-- 
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