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Add trace command to interactive prompt to control statement tracing. 

This patch adds a trace command to the interactive prompt that can be
used to control statement tracing when the code is instrumented (has
%file_line opcodes).
This commit is contained in:
Cary R 2011-03-03 18:54:46 -08:00 committed by Stephen Williams
parent b019c21f46
commit 78f985af0e
3 changed files with 36 additions and 1 deletions
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2
vvp/file_line.cc
View File

@ -27,6 +27,7 @@ struct __vpiFileLine {
};
bool show_file_line = false;
bool code_is_instrumented = false;
static int file_line_get(int type, vpiHandle ref)
{
@ -80,6 +81,7 @@ vpiHandle vpip_build_file_line(char*description, long file_idx, long lineno)
/* Turn on the diagnostic output when we find a %file_line. */
show_file_line = true;
code_is_instrumented = true;
obj->base.vpi_type = &vpip_file_line_rt;
if (description) obj->description = vpip_name_string(description);

34
vvp/stop.cc
View File

@ -1,5 +1,5 @@
/*
* Copyright (c) 2003-2010 Stephen Williams (steve@icarus.com)
* Copyright (c) 2003-2011 Stephen Williams (steve@icarus.com)
*
* This source code is free software; you can redistribute it
* and/or modify it in source code form under the terms of the GNU
@ -357,6 +357,36 @@ static void cmd_time(unsigned, char*[])
printf("%lu ticks\n", ticks);
}
static void cmd_trace(unsigned argc, char*argv[])
{
assert(argc);
switch (argc) {
case 1:
show_file_line = true;
break;
default:
printf("Only using the first argument to trace.\n");
case 2:
if ((strcmp(argv[1], "on") == 0) || (strcmp(argv[1], "1") == 0)) {
show_file_line = true;
} else show_file_line = false;
break;
}
/* You can't trace a file if the compiler didn't insert the
* %file_line opcodes. */
if (!code_is_instrumented) {
printf("The vvp input must be instrumented before tracing is "
"available.\n");
printf("Recompile with the -pfileline=1 flag to instrument "
"the input.\n");
show_file_line = false;
} else {
printf("Turning statement tracing %s.\n",
show_file_line ? "on" : "off");
}
}
static void cmd_where(unsigned, char*[])
{
struct __vpiScope*cur = stop_current_scope;
@ -412,6 +442,8 @@ static struct {
"Single-step the scheduler for 1 event."},
{ "time", &cmd_time,
"Print the current simulation time."},
{ "trace", &cmd_trace,
"Control statement tracing (on/off) when the code is instrumented."},
{ "where", &cmd_where,
"Show current scope, and scope hierarchy stack."},
{ 0, &cmd_unknown, 0}

1
vvp/vpi_priv.h
View File

@ -45,6 +45,7 @@
#define _vpiDescription 0x1000004
extern bool show_file_line;
extern bool code_is_instrumented;
extern vpiHandle vpip_build_file_line(char*description,
long file_idx, long lineno);