From dd2730739c3c1204ecee97aa936e84ad0f7c5b08 Mon Sep 17 00:00:00 2001
From: Jose Antonio Ortega Ruiz <jao@gnu.org>
Date: Sun, 22 Jul 2001 21:08:38 +0000
Subject: version 0.4

---
 mixlib/mix_vm.c | 41 ++++++++++++++++++++++-------------------
 1 file changed, 22 insertions(+), 19 deletions(-)

(limited to 'mixlib/mix_vm.c')

diff --git a/mixlib/mix_vm.c b/mixlib/mix_vm.c
index 0e9f61b..692f84d 100644
--- a/mixlib/mix_vm.c
+++ b/mixlib/mix_vm.c
@@ -67,6 +67,12 @@ vm_reset_reload_ (mix_vm_t *vm, gboolean is_reload)
       }
   if (!is_reload)
     mix_vm_clear_all_breakpoints (vm);
+
+  if (vm->address_list)
+    {
+      g_slist_free (vm->address_list);
+      vm->address_list = NULL;
+    }
 }
 
 
@@ -82,6 +88,7 @@ mix_vm_new (void)
   vm->symbol_table = NULL;
   vm->src_file = NULL;
   vm->pred_list = mix_predicate_list_new (vm);
+  vm->address_list = NULL;
   
   for (i = 0; i < BD_NO_; ++i)
     vm->devices[i] = NULL;
@@ -106,6 +113,8 @@ mix_vm_delete (mix_vm_t * vm)
   if (vm->address_table != NULL) g_tree_destroy (vm->address_table);
   if (vm->symbol_table != NULL) mix_symbol_table_delete (vm->symbol_table);
   if (vm->src_file != NULL) mix_src_file_delete (vm->src_file);
+  if (vm->pred_list != NULL) mix_predicate_list_delete (vm->pred_list);
+  if (vm->address_list != NULL) g_slist_free (vm->address_list);
   for (i = 0; i < BD_NO_; ++i)
     mix_device_delete (vm->devices[i]);
   mix_vm_clock_delete (vm->clock);
@@ -418,25 +427,6 @@ mix_vm_get_lineno_address (const mix_vm_t *vm, guint lineno)
 }
 
 
-/* Reposition program counter and reset state so that a loaded
-   program can be restarted.
-*/
-void
-mix_vm_reset_program (mix_vm_t *vm)
-{
-  guint k;
-  g_return_if_fail (vm != NULL);
-  reset_loc_ (vm);
-  halt_ (vm, FALSE);
-  set_rA_ (vm, MIX_WORD_ZERO);
-  set_rX_ (vm, MIX_WORD_ZERO);
-  set_rJ_ (vm, MIX_WORD_ZERO);
-  for ( k = 1; k < IREG_NO_+1; ++k )
-    set_rI_ (vm, k, MIX_WORD_ZERO);
-  set_over_ (vm, FALSE);
-  set_cmp_ (vm, mix_EQ);
-}
-
 /* continue execution of instructions in memory */
 int
 mix_vm_run (mix_vm_t *vm)
@@ -447,6 +437,9 @@ mix_vm_run (mix_vm_t *vm)
   while ( !is_halted_ (vm) )
     {
       mix_word_to_ins_uncheck (get_cell_ (vm, get_loc_ (vm)), ins);
+      vm->address_list =
+	g_slist_prepend (vm->address_list,
+			 GINT_TO_POINTER ((gint)get_loc_ (vm)));
       if ( !(*ins_handlers_[ins.opcode]) (vm,&ins) ) 
 	return MIX_VM_ERROR;
       else
@@ -468,6 +461,9 @@ mix_vm_exec_next (mix_vm_t *vm)
   g_return_val_if_fail (vm != NULL, MIX_VM_ERROR);
   if (get_loc_ (vm) >= MIX_VM_CELL_NO) halt_ (vm, TRUE);
   if (is_halted_ (vm)) return MIX_VM_HALT;
+  vm->address_list =
+    g_slist_prepend (vm->address_list,
+		     GINT_TO_POINTER ((gint)get_loc_ (vm)));
   mix_word_to_ins_uncheck (get_cell_ (vm, get_loc_ (vm)), ins);
   if (!(*ins_handlers_[ins.opcode]) (vm, &ins))
     return MIX_VM_ERROR;
@@ -636,3 +632,10 @@ mix_vm_get_uptime (const mix_vm_t *vm)
   return mix_vm_clock_get_time (get_clock_ (vm));
 }
 
+/* Get the list of addresses for executed instructions */
+const GSList *
+mix_vm_get_backtrace (const mix_vm_t *vm)
+{
+  g_return_val_if_fail (vm != NULL, NULL);
+  return get_address_list_ (vm);
+}
-- 
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