Add vpiStop and interactive mode.

2026-08-22 05:47:31 +02:00 · 2003-02-21 03:40:35 +00:00
parent fbac08200d
commit 2de0597038
7 changed files with 256 additions and 62 deletions
@@ -0,0 +1,179 @@
+/*
+ * Copyright (c) 2003 Stephen Williams ([email protected])
+ *
+ *    This source code is free software; you can redistribute it
+ *    and/or modify it in source code form under the terms of the GNU
+ *    General Public License as published by the Free Software
+ *    Foundation; either version 2 of the License, or (at your option)
+ *    any later version.
+ *
+ *    This program is distributed in the hope that it will be useful,
+ *    but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *    GNU General Public License for more details.
+ *
+ *    You should have received a copy of the GNU General Public License
+ *    along with this program; if not, write to the Free Software
+ *    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
+ */
+#ifdef HAVE_CVS_IDENT
+#ident "$Id: stop.cc,v 1.1 2003/02/21 03:40:35 steve Exp $"
+#endif
+
+/*
+ * This file provides a simple command line debugger for the vvp
+ * runtime. It is a means to interact with the user running the
+ * simulation.
+ */
+
+# include  "config.h"
+
+
+# include  "schedule.h"
+# include  <stdio.h>
+#ifdef HAVE_LIBREADLINE
+# include  <readline/readline.h>
+# include  <readline/history.h>
+#endif
+# include  <string.h>
+# include  <stdlib.h>
+#ifdef HAVE_MALLOC_H
+# include  <malloc.h>
+#endif
+
+static bool interact_flag = true;
+
+static void invoke_systf(const char*txt)
+{
+      printf("**** System invocation not supported yet.\n");
+}
+
+static void cmd_cont(unsigned, char*[])
+{
+      interact_flag = false;
+}
+
+static void cmd_finish(unsigned, char*[])
+{
+      interact_flag = false;
+      schedule_finish(0);
+}
+
+static void cmd_help(unsigned, char*[]);
+
+static void cmd_time(unsigned, char*[])
+{
+      unsigned long ticks = schedule_simtime();
+      printf("%lu ticks\n", ticks);
+}
+
+static void cmd_unknown(unsigned, char*argv[])
+{
+      printf("Unknown command: %s\n", argv[0]);
+      printf("Try the help command to get a summary\n"
+	     "of available commands.\n");
+}
+
+struct {
+      const char*name; 
+      void (*proc)(unsigned argc, char*argv[]);
+      const char*summary;
+} cmd_table[] = {
+      { "cont",   &cmd_cont,
+        "Resume (continue) the simulation"},
+      { "finish", &cmd_finish,
+        "Finish the simulation."},
+      { "help",  &cmd_help,
+        "Get help."},
+      { "time",   &cmd_time,
+        "Print the current simulation time."},
+      { 0,        &cmd_unknown, 0}
+};
+
+static void cmd_help(unsigned argc, char*argv[])
+{
+      printf("Commands can be from the following table of base commands,\n"
+	     "or can be invocations of system tasks/functions.\n\n");
+      for (unsigned idx = 0 ;  cmd_table[idx].name != 0 ;  idx += 1) {
+	    printf("%-8s - %s\n", cmd_table[idx].name, cmd_table[idx].summary);
+      }
+
+      printf("\nIf the command starts with a dollar ($) character, it\n"
+	     "is taken instead to be a system task or function call\n"
+	     "and will be parsed and invoked accordingly.\n");
+}
+
+
+static void invoke_command(char*txt)
+{
+      unsigned argc = 0;
+      char**argv = new char*[strlen(txt)/2];
+
+	/* Chop the line into words. */
+      for (char*cp = txt+strspn(txt, " ")
+		 ; *cp; cp += strspn(cp, " ")) { 
+	    argv[argc] = cp;
+
+	    cp += strcspn(cp, " ");
+	    if (*cp)
+		  *cp++ = 0;
+
+	    argc += 1;
+      }
+
+	/* Look up the command, using argv[0] as the key. */
+      if (argc > 0) {
+	    unsigned idx;
+	    for (idx = 0 ;  cmd_table[idx].name ;  idx += 1)
+		  if (strcmp(cmd_table[idx].name, argv[0]) == 0)
+			break;
+
+	    cmd_table[idx].proc (argc, argv);
+      }
+
+
+      delete[]argv;
+}
+
+void stop_handler(int rc)
+{
+      printf("** VVP Stop(%d) **\n", rc);
+      printf("** Current simulation time is %lu ticks.\n", schedule_simtime());
+
+      interact_flag = true;
+      while (interact_flag) {
+	    char*input = readline("> ");
+	    if (input == 0)
+		  break;
+
+	      /* Advance to the first input character. */
+	    char*first = input;
+	    while (*first && isspace(*first))
+		  first += 1;
+
+	      /* If the line starts with a $, then this is the
+		 invocation of a system task or system function, so
+		 call the invoke_systf function to handle
+		 it. Otherwise, this is a simple command, so invoke
+		 the command processor. */
+
+	    if (*first == '$') {
+		  invoke_systf(first);
+
+	    } else {
+		  invoke_command(first);
+	    }
+
+	    free(input);
+      }
+
+      printf("** Continue **\n");
+}
+
+/*
+ * $Log: stop.cc,v $
+ * Revision 1.1  2003/02/21 03:40:35  steve
+ *  Add vpiStop and interactive mode.
+ *
+ */
+