void
muf_backtrace(dbref player, dbref program, int count, struct frame *fr)
{
char buf[BUFFER_LEN];
char *ptr;
dbref ref;
int i, j, cnt, flag;
struct inst *pinst, *lastinst;
anotify_nolisten(player, CINFO "System stack backtrace:", 1);
i = count;
if (!i) i = STACK_SIZE;
ref = program;
pinst = NULL;
j = fr->system.top+1;
while (j>1 && i-->0) {
cnt = 0;
do {
lastinst = pinst;
if (--j == fr->system.top) {
pinst = fr->pc+1;
} else {
ref = fr->system.st[j].progref;
pinst = fr->system.st[j].offset;
}
ptr = unparse_sysreturn(&ref, pinst);
cnt++;
} while (pinst == lastinst && j>1);
if (cnt > 1) {
sprintf(buf, " [repeats %d times]", cnt);
notify_nolisten(player, buf, 1);
}
if (pinst != lastinst) {
sprintf(buf, "%3d) %s(#%d) %s:", j, NAME(ref), ref, ptr);
notify_nolisten(player, buf, 1);
flag = ((FLAGS(player) & INTERNAL)? 1 : 0);
FLAGS(player) &= ~INTERNAL;
list_proglines(player, ref, fr, (pinst-1)->line, 0);
if (flag) {
FLAGS(player) |= INTERNAL;
}
}
}
anotify_nolisten(player, CINFO "Done.", 1);
}
struct inst *
interp_loop(dbref player, dbref program, struct frame *fr, int rettyp)
{
register struct inst *pc;
register int atop;
register struct inst *arg;
register struct inst *temp1;
register struct inst *temp2;
register struct stack_addr *sys;
register int instr_count;
register int stop;
int i = 0, tmp, writeonly, mlev;
static struct inst retval;
char dbuf[BUFFER_LEN];
int instno_debug_line = get_primitive("debug_line");
fr->level = ++interp_depth; /* increment interp level */
/* load everything into local stuff */
pc = fr->pc;
atop = fr->argument.top;
stop = fr->system.top;
arg = fr->argument.st;
sys = fr->system.st;
writeonly = fr->writeonly;
already_created = 0;
fr->brkpt.isread = 0;
if (!pc) {
struct line *tmpline;
tmpline = PROGRAM_FIRST(program);
PROGRAM_SET_FIRST(program, (struct line *) read_program(program));
do_compile(-1, OWNER(program), program, 0);
free_prog_text(PROGRAM_FIRST(program));
PROGRAM_SET_FIRST(program, tmpline);
pc = fr->pc = PROGRAM_START(program);
if (!pc) {
abort_loop_hard("Program not compilable. Cannot run.", NULL, NULL);
}
PROGRAM_INC_PROF_USES(program);
PROGRAM_INC_INSTANCES(program);
}
ts_useobject(program);
err = 0;
instr_count = 0;
mlev = ProgMLevel(program);
gettimeofday(&fr->proftime, NULL);
/* This is the 'natural' way to exit a function */
while (stop) {
/* Abort program if player/thing running it is recycled */
if ((player < 0) || (player >= db_top) || ((Typeof(player) != TYPE_PLAYER) && (Typeof(player) != TYPE_THING)))
{
reload(fr, atop, stop);
prog_clean(fr);
interp_depth--;
calc_profile_timing(program,fr);
return NULL;
}
fr->instcnt++;
instr_count++;
if ((fr->multitask == PREEMPT) || (FLAGS(program) & BUILDER)) {
if (mlev == 4) {
if (tp_max_ml4_preempt_count)
{
if (instr_count >= tp_max_ml4_preempt_count)
abort_loop_hard("Maximum preempt instruction count exceeded", NULL, NULL);
}
else
instr_count = 0;
} else {
/* else make sure that the program doesn't run too long */
if (instr_count >= tp_max_instr_count)
abort_loop_hard("Maximum preempt instruction count exceeded", NULL, NULL);
}
} else {
/* if in FOREGROUND or BACKGROUND mode, '0 sleep' every so often. */
if ((fr->instcnt > tp_instr_slice * 4) && (instr_count >= tp_instr_slice)) {
fr->pc = pc;
reload(fr, atop, stop);
PLAYER_SET_BLOCK(player, (!fr->been_background));
add_muf_delay_event(0, fr->descr, player, NOTHING, NOTHING, program, fr,
(fr->multitask ==
FOREGROUND) ? "FOREGROUND" : "BACKGROUND");
interp_depth--;
calc_profile_timing(program,fr);
return NULL;
}
}
if (((FLAGS(program) & ZOMBIE) || fr->brkpt.force_debugging) &&
!fr->been_background &&
controls(player, program)
) {
fr->brkpt.debugging = 1;
} else {
fr->brkpt.debugging = 0;
}
if (FLAGS(program) & DARK ||
(fr->brkpt.debugging && fr->brkpt.showstack && !fr->brkpt.bypass)) {
if ((pc->type != PROG_PRIMITIVE) || (pc->data.number != instno_debug_line))
{
char *m = debug_inst(fr, 0, pc, fr->pid, arg, dbuf, sizeof(dbuf), atop, program);
notify_nolisten(player, m, 1);
}
}
if (fr->brkpt.debugging) {
short breakflag = 0;
if (stop == 1 &&
!fr->brkpt.bypass &&
pc->type == PROG_PRIMITIVE &&
pc->data.number == IN_RET
) {
/* Program is about to EXIT */
notify_nolisten(player, "Program is about to EXIT.", 1);
breakflag = 1;
} else if (fr->brkpt.count) {
for (i = 0; i < fr->brkpt.count; i++) {
if ((!fr->brkpt.pc[i] || pc == fr->brkpt.pc[i]) &&
/* pc matches */
(fr->brkpt.line[i] == -1 ||
(fr->brkpt.lastline != pc->line &&
fr->brkpt.line[i] == pc->line)) &&
/* line matches */
(fr->brkpt.level[i] == -1 ||
stop <= fr->brkpt.level[i]) &&
/* level matches */
(fr->brkpt.prog[i] == NOTHING ||
fr->brkpt.prog[i] == program) &&
/* program matches */
(fr->brkpt.linecount[i] == -2 ||
(fr->brkpt.lastline != pc->line &&
fr->brkpt.linecount[i]-- <= 0)) &&
/* line count matches */
(fr->brkpt.pccount[i] == -2 ||
(fr->brkpt.lastpc != pc &&
fr->brkpt.pccount[i]-- <= 0))
/* pc count matches */
) {
if (fr->brkpt.bypass) {
if (fr->brkpt.pccount[i] == -1)
fr->brkpt.pccount[i] = 0;
if (fr->brkpt.linecount[i] == -1)
fr->brkpt.linecount[i] = 0;
} else {
breakflag = 1;
break;
}
}
}
}
if (breakflag) {
char *m;
char buf[BUFFER_LEN];
if (fr->brkpt.dosyspop) {
program = sys[--stop].progref;
pc = sys[stop].offset;
}
add_muf_read_event(fr->descr, player, program, fr);
reload(fr, atop, stop);
fr->pc = pc;
fr->brkpt.isread = 0;
fr->brkpt.breaknum = i;
fr->brkpt.lastlisted = 0;
fr->brkpt.bypass = 0;
fr->brkpt.dosyspop = 0;
PLAYER_SET_CURR_PROG(player, program);
PLAYER_SET_BLOCK(player, 0);
interp_depth--;
if (!fr->brkpt.showstack) {
m = debug_inst(fr, 0, pc, fr->pid, arg, dbuf, sizeof(dbuf), atop, program);
notify_nolisten(player, m, 1);
}
if (pc <= PROGRAM_CODE(program) || (pc - 1)->line != pc->line) {
list_proglines(player, program, fr, pc->line, 0);
} else {
m = show_line_prims(fr, program, pc, 15, 1);
snprintf(buf, sizeof(buf), " %s", m);
notify_nolisten(player, buf, 1);
}
calc_profile_timing(program,fr);
return NULL;
}
fr->brkpt.lastline = pc->line;
fr->brkpt.lastpc = pc;
fr->brkpt.bypass = 0;
}
if (mlev < 3) {
if (fr->instcnt > (tp_max_instr_count * ((mlev == 2) ? 4 : 1)))
abort_loop_hard("Maximum total instruction count exceeded.", NULL, NULL);
}
switch (pc->type) {
case PROG_INTEGER:
case PROG_FLOAT:
case PROG_ADD:
case PROG_OBJECT:
case PROG_VAR:
case PROG_LVAR:
case PROG_SVAR:
case PROG_STRING:
case PROG_LOCK:
case PROG_MARK:
case PROG_ARRAY:
if (atop >= STACK_SIZE)
abort_loop("Stack overflow.", NULL, NULL);
copyinst(pc, arg + atop);
pc++;
atop++;
break;
case PROG_LVAR_AT:
case PROG_LVAR_AT_CLEAR:
{
struct inst *tmp;
struct localvars *lv;
if (atop >= STACK_SIZE)
abort_loop("Stack overflow.", NULL, NULL);
if (pc->data.number >= MAX_VAR || pc->data.number < 0)
abort_loop("Scoped variable number out of range.", NULL, NULL);
lv = localvars_get(fr, program);
tmp = &(lv->lvars[pc->data.number]);
copyinst(tmp, arg + atop);
if (pc->type == PROG_LVAR_AT_CLEAR) {
CLEAR(tmp);
tmp->type = PROG_INTEGER;
tmp->data.number = 0;
}
pc++;
atop++;
}
break;
case PROG_LVAR_BANG:
{
struct inst *the_var;
struct localvars *lv;
if (atop < 1)
abort_loop("Stack Underflow.", NULL, NULL);
if (fr->trys.top && atop - fr->trys.st->depth < 1)
abort_loop("Stack protection fault.", NULL, NULL);
if (pc->data.number >= MAX_VAR || pc->data.number < 0)
abort_loop("Scoped variable number out of range.", NULL, NULL);
lv = localvars_get(fr, program);
the_var = &(lv->lvars[pc->data.number]);
CLEAR(the_var);
temp1 = arg + --atop;
*the_var = *temp1;
pc++;
}
break;
case PROG_SVAR_AT:
case PROG_SVAR_AT_CLEAR:
{
struct inst *tmp;
if (atop >= STACK_SIZE)
abort_loop("Stack overflow.", NULL, NULL);
tmp = scopedvar_get(fr, 0, pc->data.number);
if (!tmp)
abort_loop("Scoped variable number out of range.", NULL, NULL);
copyinst(tmp, arg + atop);
if (pc->type == PROG_SVAR_AT_CLEAR) {
CLEAR(tmp);
tmp->type = PROG_INTEGER;
tmp->data.number = 0;
}
pc++;
atop++;
}
break;
case PROG_SVAR_BANG:
{
struct inst *the_var;
if (atop < 1)
abort_loop("Stack Underflow.", NULL, NULL);
if (fr->trys.top && atop - fr->trys.st->depth < 1)
abort_loop("Stack protection fault.", NULL, NULL);
the_var = scopedvar_get(fr, 0, pc->data.number);
if (!the_var)
abort_loop("Scoped variable number out of range.", NULL, NULL);
CLEAR(the_var);
temp1 = arg + --atop;
*the_var = *temp1;
pc++;
}
break;
case PROG_FUNCTION:
{
int i = pc->data.mufproc->args;
if (atop < i)
abort_loop("Stack Underflow.", NULL, NULL);
if (fr->trys.top && atop - fr->trys.st->depth < i)
abort_loop("Stack protection fault.", NULL, NULL);
if (fr->skip_declare)
fr->skip_declare = 0;
else
scopedvar_addlevel(fr, pc, pc->data.mufproc->vars);
while (i-->0)
{
struct inst *tmp;
temp1 = arg + --atop;
tmp = scopedvar_get(fr, 0, i);
if (!tmp)
abort_loop_hard("Internal error: Scoped variable number out of range in FUNCTION init.", temp1, NULL);
CLEAR(tmp);
copyinst(temp1, tmp);
CLEAR(temp1);
}
pc++;
}
break;
case PROG_IF:
if (atop < 1)
abort_loop("Stack Underflow.", NULL, NULL);
if (fr->trys.top && atop - fr->trys.st->depth < 1)
abort_loop("Stack protection fault.", NULL, NULL);
temp1 = arg + --atop;
if (false_inst(temp1))
pc = pc->data.call;
else
pc++;
CLEAR(temp1);
break;
case PROG_EXEC:
if (stop >= STACK_SIZE)
abort_loop("System Stack Overflow", NULL, NULL);
sys[stop].progref = program;
sys[stop++].offset = pc + 1;
pc = pc->data.call;
fr->skip_declare = 0; /* Make sure we DON'T skip var decls */
break;
case PROG_JMP:
/* Don't need to worry about skipping scoped var decls here. */
/* JMP to a function header can only happen in IN_JMP */
pc = pc->data.call;
break;
case PROG_TRY:
if (atop < 1)
abort_loop("Stack Underflow.", NULL, NULL);
if (fr->trys.top && atop - fr->trys.st->depth < 1)
abort_loop("Stack protection fault.", NULL, NULL);
temp1 = arg + --atop;
if (temp1->type != PROG_INTEGER || temp1->data.number < 0)
abort_loop("Argument is not a positive integer.", temp1, NULL);
if (fr->trys.top && atop - fr->trys.st->depth < temp1->data.number)
abort_loop("Stack protection fault.", NULL, NULL);
if (temp1->data.number > atop)
abort_loop("Stack Underflow.", temp1, NULL);
fr->trys.top++;
fr->trys.st = push_try(fr->trys.st);
fr->trys.st->depth = atop - temp1->data.number;
fr->trys.st->call_level = stop;
fr->trys.st->for_count = 0;
fr->trys.st->addr = pc->data.call;
pc++;
CLEAR(temp1);
break;
case PROG_PRIMITIVE:
/*
* All pc modifiers and stuff like that should stay here,
* everything else call with an independent dispatcher.
*/
switch (pc->data.number) {
case IN_JMP:
if (atop < 1)
abort_loop("Stack underflow. Missing address.", NULL, NULL);
if (fr->trys.top && atop - fr->trys.st->depth < 1)
abort_loop("Stack protection fault.", NULL, NULL);
temp1 = arg + --atop;
if (temp1->type != PROG_ADD)
abort_loop("Argument is not an address.", temp1, NULL);
if (temp1->data.addr->progref >= db_top ||
temp1->data.addr->progref < 0 ||
(Typeof(temp1->data.addr->progref) != TYPE_PROGRAM))
abort_loop_hard("Internal error. Invalid address.", temp1, NULL);
if (program != temp1->data.addr->progref) {
abort_loop("Destination outside current program.", temp1, NULL);
}
if (temp1->data.addr->data->type == PROG_FUNCTION) {
fr->skip_declare = 1;
}
pc = temp1->data.addr->data;
CLEAR(temp1);
break;
case IN_EXECUTE:
if (atop < 1)
abort_loop("Stack Underflow. Missing address.", NULL, NULL);
if (fr->trys.top && atop - fr->trys.st->depth < 1)
abort_loop("Stack protection fault.", NULL, NULL);
temp1 = arg + --atop;
if (temp1->type != PROG_ADD)
abort_loop("Argument is not an address.", temp1, NULL);
if (temp1->data.addr->progref >= db_top ||
temp1->data.addr->progref < 0 ||
(Typeof(temp1->data.addr->progref) != TYPE_PROGRAM))
abort_loop_hard("Internal error. Invalid address.", temp1, NULL);
if (stop >= STACK_SIZE)
abort_loop("System Stack Overflow", temp1, NULL);
sys[stop].progref = program;
sys[stop++].offset = pc + 1;
if (program != temp1->data.addr->progref) {
program = temp1->data.addr->progref;
fr->caller.st[++fr->caller.top] = program;
mlev = ProgMLevel(program);
PROGRAM_INC_INSTANCES(program);
}
pc = temp1->data.addr->data;
CLEAR(temp1);
break;
case IN_CALL:
if (atop < 1)
abort_loop("Stack Underflow. Missing dbref argument.", NULL, NULL);
if (fr->trys.top && atop - fr->trys.st->depth < 1)
abort_loop("Stack protection fault.", NULL, NULL);
temp1 = arg + --atop;
temp2 = 0;
if (temp1->type != PROG_OBJECT) {
temp2 = temp1;
if (atop < 1)
abort_loop("Stack Underflow. Missing dbref of func.", temp1, NULL);
if (fr->trys.top && atop - fr->trys.st->depth < 1)
abort_loop("Stack protection fault.", NULL, NULL);
temp1 = arg + --atop;
if (temp2->type != PROG_STRING)
abort_loop("Public Func. name string required. (2)", temp1, temp2);
if (!temp2->data.string)
abort_loop("Null string not allowed. (2)", temp1, temp2);
}
if (temp1->type != PROG_OBJECT)
abort_loop("Dbref required. (1)", temp1, temp2);
if (!valid_object(temp1)
|| Typeof(temp1->data.objref) != TYPE_PROGRAM)
abort_loop("Invalid object.", temp1, temp2);
if (!(PROGRAM_CODE(temp1->data.objref))) {
struct line *tmpline;
tmpline = PROGRAM_FIRST(temp1->data.objref);
PROGRAM_SET_FIRST(temp1->data.objref,
(struct line *) read_program(temp1->data.objref));
do_compile(-1, OWNER(temp1->data.objref), temp1->data.objref, 0);
free_prog_text(PROGRAM_FIRST(temp1->data.objref));
PROGRAM_SET_FIRST(temp1->data.objref, tmpline);
if (!(PROGRAM_CODE(temp1->data.objref)))
abort_loop("Program not compilable.", temp1, temp2);
}
if (ProgMLevel(temp1->data.objref) == 0)
abort_loop("Permission denied", temp1, temp2);
if (mlev < 4 && OWNER(temp1->data.objref) != ProgUID
&& !Linkable(temp1->data.objref))
abort_loop("Permission denied", temp1, temp2);
if (stop >= STACK_SIZE)
abort_loop("System Stack Overflow", temp1, temp2);
sys[stop].progref = program;
sys[stop].offset = pc + 1;
if (!temp2) {
pc = PROGRAM_START(temp1->data.objref);
} else {
struct publics *pbs;
int tmpint;
pbs = PROGRAM_PUBS(temp1->data.objref);
while (pbs) {
tmpint = string_compare(temp2->data.string->data, pbs->subname);
if (!tmpint)
break;
pbs = pbs->next;
}
if (!pbs)
abort_loop("PUBLIC or WIZCALL function not found. (2)", temp2, temp2);
if (mlev < pbs->mlev)
abort_loop("Insufficient permissions to call WIZCALL function. (2)",
temp2, temp2);
pc = pbs->addr.ptr;
}
stop++;
if (temp1->data.objref != program) {
calc_profile_timing(program,fr);
gettimeofday(&fr->proftime, NULL);
program = temp1->data.objref;
fr->caller.st[++fr->caller.top] = program;
PROGRAM_INC_INSTANCES(program);
mlev = ProgMLevel(program);
}
PROGRAM_INC_PROF_USES(program);
ts_useobject(program);
CLEAR(temp1);
if (temp2)
CLEAR(temp2);
break;
case IN_RET:
if (stop > 1 && program != sys[stop - 1].progref) {
if (sys[stop - 1].progref >= db_top ||
sys[stop - 1].progref < 0 ||
(Typeof(sys[stop - 1].progref) != TYPE_PROGRAM))
abort_loop_hard("Internal error. Invalid address.", NULL, NULL);
calc_profile_timing(program,fr);
gettimeofday(&fr->proftime, NULL);
PROGRAM_DEC_INSTANCES(program);
program = sys[stop - 1].progref;
mlev = ProgMLevel(program);
fr->caller.top--;
}
scopedvar_poplevel(fr);
pc = sys[--stop].offset;
break;
case IN_CATCH:
case IN_CATCH_DETAILED:
{
int depth;
if (!(fr->trys.top))
abort_loop_hard("Internal error. TRY stack underflow.", NULL, NULL);
depth = fr->trys.st->depth;
while (atop > depth) {
temp1 = arg + --atop;
CLEAR(temp1);
}
while (fr->trys.st->for_count-->0) {
CLEAR(&fr->fors.st->cur);
CLEAR(&fr->fors.st->end);
fr->fors.top--;
fr->fors.st = pop_for(fr->fors.st);
}
fr->trys.top--;
fr->trys.st = pop_try(fr->trys.st);
if (pc->data.number == IN_CATCH) {
/* IN_CATCH */
if (fr->errorstr) {
arg[atop].type = PROG_STRING;
arg[atop++].data.string = alloc_prog_string(fr->errorstr);
free(fr->errorstr);
fr->errorstr = NULL;
} else {
arg[atop].type = PROG_STRING;
arg[atop++].data.string = NULL;
}
if (fr->errorinst) {
free(fr->errorinst);
fr->errorinst = NULL;
}
} else {
/* IN_CATCH_DETAILED */
stk_array *nu = new_array_dictionary();
if (fr->errorstr) {
array_set_strkey_strval(&nu, "error", fr->errorstr);
free(fr->errorstr);
fr->errorstr = NULL;
}
if (fr->errorinst) {
array_set_strkey_strval(&nu, "instr", fr->errorinst);
free(fr->errorinst);
fr->errorinst = NULL;
}
array_set_strkey_intval(&nu, "line", fr->errorline);
array_set_strkey_refval(&nu, "program", fr->errorprog);
arg[atop].type = PROG_ARRAY;
arg[atop++].data.array = nu;
}
reload(fr, atop, stop);
}
pc++;
break;
case IN_EVENT_WAITFOR:
if (atop < 1)
abort_loop("Stack Underflow. Missing eventID list array argument.", NULL, NULL);
if (fr->trys.top && atop - fr->trys.st->depth < 1)
abort_loop("Stack protection fault.", NULL, NULL);
temp1 = arg + --atop;
if (temp1->type != PROG_ARRAY)
abort_loop("EventID string list array expected.", temp1, NULL);
if (temp1->data.array && temp1->data.array->type != ARRAY_PACKED)
abort_loop("Argument must be a list array of eventid strings.", temp1, NULL);
if (!array_is_homogenous(temp1->data.array, PROG_STRING))
abort_loop("Argument must be a list array of eventid strings.", temp1, NULL);
fr->pc = pc + 1;
reload(fr, atop, stop);
{
int i, outcount;
int count = array_count(temp1->data.array);
char** events = (char**)malloc(count * sizeof(char**));
for (outcount = i = 0; i < count; i++) {
char *val = array_get_intkey_strval(temp1->data.array, i);
if (val != NULL) {
int found = 0;
int j;
for (j = 0; j < outcount; j++) {
if (!strcmp(events[j], val)) {
found = 1;
break;
}
}
if (!found) {
events[outcount++] = val;
}
}
}
muf_event_register_specific(player, program, fr, outcount, events);
free(events);
}
PLAYER_SET_BLOCK(player, (!fr->been_background));
CLEAR(temp1);
interp_depth--;
calc_profile_timing(program,fr);
return NULL;
/* NOTREACHED */
break;
case IN_READ:
if (writeonly)
abort_loop("Program is write-only.", NULL, NULL);
if (fr->multitask == BACKGROUND)
abort_loop("BACKGROUND programs are write only.", NULL, NULL);
reload(fr, atop, stop);
fr->brkpt.isread = 1;
fr->pc = pc + 1;
PLAYER_SET_CURR_PROG(player, program);
PLAYER_SET_BLOCK(player, 0);
add_muf_read_event(fr->descr, player, program, fr);
interp_depth--;
calc_profile_timing(program,fr);
return NULL;
/* NOTREACHED */
break;
case IN_SLEEP:
if (atop < 1)
abort_loop("Stack Underflow.", NULL, NULL);
if (fr->trys.top && atop - fr->trys.st->depth < 1)
abort_loop("Stack protection fault.", NULL, NULL);
temp1 = arg + --atop;
if (temp1->type != PROG_INTEGER)
abort_loop("Invalid argument type.", temp1, NULL);
fr->pc = pc + 1;
reload(fr, atop, stop);
if (temp1->data.number < 0)
abort_loop("Timetravel beyond scope of muf.", temp1, NULL);
add_muf_delay_event(temp1->data.number, fr->descr, player,
NOTHING, NOTHING, program, fr, "SLEEPING");
PLAYER_SET_BLOCK(player, (!fr->been_background));
interp_depth--;
calc_profile_timing(program,fr);
return NULL;
/* NOTREACHED */
break;
default:
nargs = 0;
reload(fr, atop, stop);
tmp = atop;
prim_func[pc->data.number - 1] (player, program, mlev, pc, arg, &tmp, fr);
atop = tmp;
pc++;
break;
} /* switch */
break;
case PROG_CLEARED:
log_status("WARNING: attempt to execute instruction cleared by %s:%hd in program %d",
(char*)pc->data.addr, pc->line, program);
pc = NULL;
abort_loop_hard("Program internal error. Program erroneously freed from memory.",
NULL, NULL);
default:
pc = NULL;
abort_loop_hard("Program internal error. Unknown instruction type.",
NULL, NULL);
} /* switch */
if (err) {
if (err != ERROR_DIE_NOW && fr->trys.top) {
while (fr->trys.st->call_level < stop) {
if (stop > 1 && program != sys[stop - 1].progref) {
if (sys[stop - 1].progref >= db_top ||
sys[stop - 1].progref < 0 ||
(Typeof(sys[stop - 1].progref) != TYPE_PROGRAM))
abort_loop_hard("Internal error. Invalid address.", NULL, NULL);
calc_profile_timing(program,fr);
gettimeofday(&fr->proftime, NULL);
PROGRAM_DEC_INSTANCES(program);
program = sys[stop - 1].progref;
mlev = ProgMLevel(program);
fr->caller.top--;
}
scopedvar_poplevel(fr);
stop--;
}
pc = fr->trys.st->addr;
err = 0;
} else {
reload(fr, atop, stop);
prog_clean(fr);
PLAYER_SET_BLOCK(player, 0);
interp_depth--;
calc_profile_timing(program,fr);
return NULL;
}
}
} /* while */
PLAYER_SET_BLOCK(player, 0);
if (atop) {
struct inst *rv;
if (rettyp) {
copyinst(arg + atop - 1, &retval);
rv = &retval;
} else {
if (!false_inst(arg + atop - 1)) {
rv = (struct inst *) 1;
} else {
rv = NULL;
}
}
reload(fr, atop, stop);
prog_clean(fr);
interp_depth--;
calc_profile_timing(program,fr);
return rv;
}
reload(fr, atop, stop);
prog_clean(fr);
interp_depth--;
calc_profile_timing(program,fr);
return NULL;
}
int
muf_debugger(dbref player, dbref program, const char *text, struct frame *fr)
{
char cmd[BUFFER_LEN];
char buf[BUFFER_LEN];
char *ptr, *ptr2, *arg;
struct inst *pinst;
int i, j, cnt;
while (isspace(*text)) text++;
strcpy(cmd, text);
ptr = cmd + strlen(cmd);
if (ptr > cmd) ptr--;
while (ptr >= cmd && isspace(*ptr)) *ptr-- = '\0';
for (arg = cmd; *arg && !isspace(*arg); arg++);
if (*arg) *arg++ = '\0';
if (!*cmd && fr->brkpt.lastcmd) {
strcpy(cmd, fr->brkpt.lastcmd);
} else {
if (fr->brkpt.lastcmd)
free(fr->brkpt.lastcmd);
if (*cmd)
fr->brkpt.lastcmd = string_dup(cmd);
}
/* delete triggering breakpoint, if it's only temp. */
j = fr->brkpt.breaknum;
if (j >= 0 && fr->brkpt.temp[j]) {
for (j++; j < fr->brkpt.count; j++) {
fr->brkpt.temp[j-1] = fr->brkpt.temp[j];
fr->brkpt.level[j-1] = fr->brkpt.level[j];
fr->brkpt.line[j-1] = fr->brkpt.line[j];
fr->brkpt.linecount[j-1] = fr->brkpt.linecount[j];
fr->brkpt.pc[j-1] = fr->brkpt.pc[j];
fr->brkpt.pccount[j-1] = fr->brkpt.pccount[j];
fr->brkpt.prog[j-1] = fr->brkpt.prog[j];
}
fr->brkpt.count--;
}
fr->brkpt.breaknum = -1;
if (!string_compare(cmd, "cont")) {
} else if (!string_compare(cmd, "finish")) {
if (fr->brkpt.count >= MAX_BREAKS) {
anotify_nolisten(player, CFAIL "Cannot finish because there are too many breakpoints set.", 1);
add_muf_read_event(player, program, fr);
return 0;
}
j = fr->brkpt.count++;
fr->brkpt.temp[j] = 1;
fr->brkpt.level[j] = fr->system.top - 1;
fr->brkpt.line[j] = -1;
fr->brkpt.linecount[j] = -2;
fr->brkpt.pc[j] = NULL;
fr->brkpt.pccount[j] = -2;
fr->brkpt.prog[j] = program;
fr->brkpt.bypass = 1;
return 0;
} else if (!string_compare(cmd, "stepi")) {
i = atoi(arg);
if (!i) i = 1;
if (fr->brkpt.count >= MAX_BREAKS) {
anotify_nolisten(player, CFAIL "Cannot stepi because there are too many breakpoints set.", 1);
add_muf_read_event(player, program, fr);
return 0;
}
j = fr->brkpt.count++;
fr->brkpt.temp[j] = 1;
fr->brkpt.level[j] = -1;
fr->brkpt.line[j] = -1;
fr->brkpt.linecount[j] = -2;
fr->brkpt.pc[j] = NULL;
fr->brkpt.pccount[j] = i;
fr->brkpt.prog[j] = NOTHING;
fr->brkpt.bypass = 1;
return 0;
} else if (!string_compare(cmd, "step")) {
i = atoi(arg);
if (!i) i = 1;
if (fr->brkpt.count >= MAX_BREAKS) {
anotify_nolisten(player, CFAIL "Cannot step because there are too many breakpoints set.", 1);
add_muf_read_event(player, program, fr);
return 0;
}
j = fr->brkpt.count++;
fr->brkpt.temp[j] = 1;
fr->brkpt.level[j] = -1;
fr->brkpt.line[j] = -1;
fr->brkpt.linecount[j] = i;
fr->brkpt.pc[j] = NULL;
fr->brkpt.pccount[j] = -2;
fr->brkpt.prog[j] = NOTHING;
fr->brkpt.bypass = 1;
return 0;
} else if (!string_compare(cmd, "nexti")) {
i = atoi(arg);
if (!i) i = 1;
if (fr->brkpt.count >= MAX_BREAKS) {
anotify_nolisten(player, CFAIL "Cannot nexti because there are too many breakpoints set.", 1);
add_muf_read_event(player, program, fr);
return 0;
}
j = fr->brkpt.count++;
fr->brkpt.temp[j] = 1;
fr->brkpt.level[j] = fr->system.top;
fr->brkpt.line[j] = -1;
fr->brkpt.linecount[j] = -2;
fr->brkpt.pc[j] = NULL;
fr->brkpt.pccount[j] = i;
fr->brkpt.prog[j] = program;
fr->brkpt.bypass = 1;
return 0;
} else if (!string_compare(cmd, "next")) {
i = atoi(arg);
if (!i) i = 1;
if (fr->brkpt.count >= MAX_BREAKS) {
anotify_nolisten(player, CFAIL "Cannot next because there are too many breakpoints set.", 1);
add_muf_read_event(player, program, fr);
return 0;
}
j = fr->brkpt.count++;
fr->brkpt.temp[j] = 1;
fr->brkpt.level[j] = fr->system.top;
fr->brkpt.line[j] = -1;
fr->brkpt.linecount[j] = i;
fr->brkpt.pc[j] = NULL;
fr->brkpt.pccount[j] = -2;
fr->brkpt.prog[j] = program;
fr->brkpt.bypass = 1;
return 0;
} else if (!string_compare(cmd, "exec")) {
if (fr->brkpt.count >= MAX_BREAKS) {
anotify_nolisten(player, CFAIL "Cannot finish because there are too many breakpoints set.", 1);
add_muf_read_event(player, program, fr);
return 0;
}
if (!(pinst = funcname_to_pc(program, arg))) {
anotify_nolisten(player, CINFO "I don't know a function by that name.", 1);
add_muf_read_event(player, program, fr);
return 0;
}
if (fr->system.top >= STACK_SIZE) {
anotify_nolisten(player, CFAIL "That would exceed the system stack size for this program.", 1);
add_muf_read_event(player, program, fr);
return 0;
}
fr->system.st[fr->system.top].progref = program;
fr->system.st[fr->system.top++].offset = fr->pc;
fr->pc = pinst;
j = fr->brkpt.count++;
fr->brkpt.temp[j] = 1;
fr->brkpt.level[j] = fr->system.top - 1;
fr->brkpt.line[j] = -1;
fr->brkpt.linecount[j] = -2;
fr->brkpt.pc[j] = NULL;
fr->brkpt.pccount[j] = -2;
fr->brkpt.prog[j] = program;
fr->brkpt.bypass = 1;
return 0;
} else if (!string_compare(cmd, "prim")) {
if (fr->brkpt.count >= MAX_BREAKS) {
anotify_nolisten(player, CFAIL "Cannot finish because there are too many breakpoints set.", 1);
add_muf_read_event(player, program, fr);
return 0;
}
if (!(i = primitive(arg))) {
anotify_nolisten(player, CINFO "I don't recognize that primitive.", 1);
add_muf_read_event(player, program, fr);
return 0;
}
if (fr->system.top >= STACK_SIZE) {
anotify_nolisten(player, CFAIL "That would exceed the system stack size for this program.", 1);
add_muf_read_event(player, program, fr);
return 0;
}
shstr.data[0] = '\0';
shstr.links = 1;
shstr.length= strlen(shstr.data);
primset[0].type = PROG_FUNCTION;
primset[0].line = 0;
primset[0].data.string = &shstr;
primset[1].type = PROG_PRIMITIVE;
primset[1].line = 0;
primset[1].data.number = i;
primset[2].type = PROG_PRIMITIVE;
primset[2].line = 0;
primset[2].data.number = primitive("EXIT");
fr->system.st[fr->system.top].progref = program;
fr->system.st[fr->system.top++].offset = fr->pc;
fr->pc = primset;
j = fr->brkpt.count++;
fr->brkpt.temp[j] = 1;
fr->brkpt.level[j] = fr->system.top - 1;
fr->brkpt.line[j] = -1;
fr->brkpt.linecount[j] = -2;
fr->brkpt.pc[j] = NULL;
fr->brkpt.pccount[j] = -2;
fr->brkpt.prog[j] = program;
fr->brkpt.bypass = 1;
return 0;
} else if (!string_compare(cmd, "break")) {
add_muf_read_event(player, program, fr);
if (fr->brkpt.count >= MAX_BREAKS) {
anotify_nolisten(player, CFAIL "Too many breakpoints set.", 1);
return 0;
}
if (number(arg)) {
i = atoi(arg);
} else {
if (!(pinst = funcname_to_pc(program, arg))) {
anotify_nolisten(player, CINFO "I don't know a function by that name.", 1);
return 0;
} else {
i = pinst->line;
}
}
if (!i) i = fr->pc->line;
j = fr->brkpt.count++;
fr->brkpt.temp[j] = 0;
fr->brkpt.level[j] = -1;
fr->brkpt.line[j] = i;
fr->brkpt.linecount[j] = -2;
fr->brkpt.pc[j] = NULL;
fr->brkpt.pccount[j] = -2;
fr->brkpt.prog[j] = program;
anotify_nolisten(player, CSUCC "Breakpoint set.", 1);
return 0;
} else if (!string_compare(cmd, "delete")) {
add_muf_read_event(player, program, fr);
i = atoi(arg);
if (!i) {
anotify_nolisten(player, CINFO "Which breakpoint did you want to delete?", 1);
return 0;
}
if (i < 1 || i > fr->brkpt.count) {
anotify_nolisten(player, CFAIL "No such breakpoint.", 1);
return 0;
}
j = i - 1;
for (j++; j < fr->brkpt.count; j++) {
fr->brkpt.temp[j-1] = fr->brkpt.temp[j];
fr->brkpt.level[j-1] = fr->brkpt.level[j];
fr->brkpt.line[j-1] = fr->brkpt.line[j];
fr->brkpt.linecount[j-1] = fr->brkpt.linecount[j];
fr->brkpt.pc[j-1] = fr->brkpt.pc[j];
fr->brkpt.pccount[j-1] = fr->brkpt.pccount[j];
fr->brkpt.prog[j-1] = fr->brkpt.prog[j];
}
fr->brkpt.count--;
anotify_nolisten(player, CSUCC "Breakpoint deleted.", 1);
return 0;
} else if (!string_compare(cmd, "breaks")) {
anotify_nolisten(player, CINFO "Breakpoints:", 1);
for (i = 0; i < fr->brkpt.count; i++) {
ptr = unparse_breakpoint(fr, i);
notify_nolisten(player, ptr, 1);
}
anotify_nolisten(player, CINFO "Done.", 1);
add_muf_read_event(player, program, fr);
return 0;
} else if (!string_compare(cmd, "where")) {
i = atoi(arg);
muf_backtrace(player, program, i, fr);
add_muf_read_event(player, program, fr);
return 0;
} else if (!string_compare(cmd, "stack")) {
anotify_nolisten(player, CINFO "*Argument stack top*", 1);
i = atoi(arg);
if (!i) i = STACK_SIZE;
ptr = "";
for (j = fr->argument.top; j>0 && i-->0;) {
cnt = 0;
do {
strcpy(buf, ptr);
ptr = insttotext(&fr->argument.st[--j], 4000, program);
cnt++;
} while (!string_compare(ptr, buf) && j>0);
if (cnt > 1)
notify_fmt(player, " [repeats %d times]", cnt);
if (string_compare(ptr, buf))
notify_fmt(player, "%3d) %s", j+1, ptr);
}
anotify_nolisten(player, CINFO "Done.", 1);
add_muf_read_event(player, program, fr);
return 0;
} else if (!string_compare(cmd, "list") ||
!string_compare(cmd, "listi")) {
int startline, endline;
startline = endline = 0;
add_muf_read_event(player, program, fr);
if ((ptr2 = (char *)index(arg, ','))) {
*ptr2++ = '\0';
} else {
ptr2 = "";
}
if (!*arg) {
if (fr->brkpt.lastlisted) {
startline = fr->brkpt.lastlisted + 1;
} else {
startline = fr->pc->line;
}
endline = startline + 15;
} else {
if (!number(arg)) {
if (!(pinst = funcname_to_pc(program, arg))) {
anotify_nolisten(player, CINFO "I don't know a function by that name. (starting arg, 1)", 1);
return 0;
} else {
startline = pinst->line;
endline = startline + 15;
}
} else {
if (*ptr2) {
endline = startline = atoi(arg);
} else {
startline = atoi(arg) - 7;
endline = startline + 15;
}
}
}
if (*ptr2) {
if (!number(ptr2)) {
if (!(pinst = funcname_to_pc(program, ptr2))) {
anotify_nolisten(player, CINFO "I don't know a function by that name. (ending arg, 1)", 1);
return 0;
} else {
endline = pinst->line;
}
} else {
endline = atoi(ptr2);
}
}
i = (DBFETCH(program)->sp.program.code +
DBFETCH(program)->sp.program.siz - 1)->line;
if (startline > i) {
anotify_nolisten(player, CFAIL "Starting line is beyond end of program.", 1);
return 0;
}
if (startline < 1) startline = 1;
if (endline > i) endline = i;
if (endline < startline) endline = startline;
anotify_nolisten(player, CINFO "Listing:", 1);
if (!string_compare(cmd, "listi")) {
for (i = startline; i <= endline; i++) {
pinst = linenum_to_pc(program, i);
if (pinst) {
sprintf(buf, "line %d: %s", i, (i == fr->pc->line) ?
show_line_prims(program, fr->pc, STACK_SIZE, 1) :
show_line_prims(program, pinst, STACK_SIZE, 0));
notify_nolisten(player, buf, 1);
}
}
} else {
list_proglines(player, program, fr, startline, endline);
}
fr->brkpt.lastlisted = endline;
anotify_nolisten(player, CINFO "Done.", 1);
return 0;
} else if (!string_compare(cmd, "quit")) {
anotify_nolisten(player, CINFO "Halting execution.", 1);
return 1;
} else if (!string_compare(cmd, "trace")) {
add_muf_read_event(player, program, fr);
if (!string_compare(arg, "on")) {
fr->brkpt.showstack = 1;
anotify_nolisten(player, CSUCC "Trace turned on.", 1);
} else if (!string_compare(arg, "off")) {
fr->brkpt.showstack = 0;
anotify_nolisten(player, CSUCC "Trace turned off.", 1);
} else {
sprintf(buf, CINFO "Trace is currently %s.",
fr->brkpt.showstack? "on" : "off");
anotify_nolisten(player, buf, 1);
}
return 0;
} else if (!string_compare(cmd, "words")) {
list_program_functions(player, program, arg);
add_muf_read_event(player, program, fr);
return 0;
} else if (!string_compare(cmd, "print")) {
debug_printvar(player, fr, arg);
add_muf_read_event(player, program, fr);
return 0;
} else if (!string_compare(cmd, "push")) {
push_arg(player, fr, arg);
add_muf_read_event(player, program, fr);
return 0;
} else if (!string_compare(cmd, "pop")) {
add_muf_read_event(player, program, fr);
if (fr->argument.top < 1) {
anotify_nolisten(player, CFAIL "Nothing to pop.", 1);
return 0;
}
fr->argument.top--;
CLEAR(fr->argument.st + fr->argument.top);
anotify_nolisten(player, CSUCC "Stack item popped.", 1);
return 0;
} else if (!string_compare(cmd, "help")) {
notify_nolisten(player, "cont continues execution until a breakpoint is hit.", 1);
notify_nolisten(player, "finish completes execution of current function.", 1);
notify_nolisten(player, "step [NUM] executes one (or NUM, 1) lines of muf.", 1);
notify_nolisten(player, "stepi [NUM] executes one (or NUM, 1) muf instructions.", 1);
notify_nolisten(player, "next [NUM] like step, except skips CALL and EXECUTE.", 1);
notify_nolisten(player, "nexti [NUM] like stepi, except skips CALL and EXECUTE.", 1);
notify_nolisten(player, "break LINE# sets breakpoint at given LINE number.", 1);
notify_nolisten(player, "break FUNCNAME sets breakpoint at start of given function.", 1);
notify_nolisten(player, "breaks lists all currently set breakpoints.", 1);
notify_nolisten(player, "delete NUM deletes breakpoint by NUM, as listed by 'breaks'", 1);
notify_nolisten(player, "where [LEVS] displays function call backtrace of up to num levels deep.", 1);
notify_nolisten(player, "stack [NUM] shows the top num items on the stack.", 1);
notify_nolisten(player, "print v# displays the value of given global variable #.", 1);
notify_nolisten(player, "print lv# displays the value of given local variable #.", 1);
notify_nolisten(player, "trace [on|off] turns on/off debug stack tracing.", 1);
notify_nolisten(player, "list [L1,[L2]] lists source code of given line range.", 1);
notify_nolisten(player, "list FUNCNAME lists source code of given function.", 1);
notify_nolisten(player, "listi [L1,[L2]] lists instructions in given line range.", 1);
notify_nolisten(player, "listi FUNCNAME lists instructions in given function.", 1);
notify_nolisten(player, "words lists all function word names in program.", 1);
notify_nolisten(player, "words PATTERN lists all function word names that match PATTERN.", 1);
notify_nolisten(player, "exec FUNCNAME calls given function with the current stack data.", 1);
notify_nolisten(player, "prim PRIMITIVE executes given primitive with current stack data.", 1);
notify_nolisten(player, "push DATA pushes an int, dbref, var, or string onto the stack.", 1);
notify_nolisten(player, "pop pops top data item off the stack.", 1);
notify_nolisten(player, "help displays this help screen.", 1);
notify_nolisten(player, "quit stop execution here.", 1);
add_muf_read_event(player, program, fr);
return 0;
} else {
anotify_nolisten(player, CINFO "I don't understand that debugger command. Type 'help' for help.", 1);
add_muf_read_event(player, program, fr);
return 0;
}
return 0;
}
/**
* Implementation of the MUF debugger
*
* This implements the command parsing for the MUF debugger. It also clears
* temporary bookmarks if this was triggered from a temporary one.
*
* This relies on some static globals, so it is not threadsafe. If the
* 'prim' debugger command is ever used to trigger the MUF debugger somehow
* in a recursive fashion, and then you call 'prim' again, it will probably
* cause havock.
*
* @param descr the descriptor of the debugging player
* @param player the debugging player
* @param program the program we are debugging
* @param text the input text from the user
* @param fr the current frame pointer
* @return boolean true if the program should exit, false if not
*/
int
muf_debugger(int descr, dbref player, dbref program, const char *text, struct frame *fr)
{
char cmd[BUFFER_LEN];
char buf[BUFFER_LEN];
char buf2[BUFFER_LEN];
char *ptr, *ptr2, *arg;
struct inst *pinst;
int i, j, cnt;
static struct inst primset[5];
static struct muf_proc_data temp_muf_proc_data = {
"__Temp_Debugger_Proc",
0,
0,
NULL
};
/*
* Basic massaging of the input - clearing spaces, finding the
* argument.
*/
skip_whitespace(&text);
strcpyn(cmd, sizeof(cmd), text);
ptr = cmd;
remove_ending_whitespace(&ptr);
for (arg = cmd; *arg && !isspace(*arg); arg++) ;
if (*arg)
*arg++ = '\0';
/* Empty command means repeat last command, if available */
if (!*cmd && fr->brkpt.lastcmd) {
strcpyn(cmd, sizeof(cmd), fr->brkpt.lastcmd);
} else {
free(fr->brkpt.lastcmd);
if (*cmd)
fr->brkpt.lastcmd = strdup(cmd);
}
/* delete triggering breakpoint, if it's only temp. */
j = fr->brkpt.breaknum;
if (j >= 0 && fr->brkpt.temp[j]) {
for (j++; j < fr->brkpt.count; j++) {
fr->brkpt.temp[j - 1] = fr->brkpt.temp[j];
fr->brkpt.level[j - 1] = fr->brkpt.level[j];
fr->brkpt.line[j - 1] = fr->brkpt.line[j];
fr->brkpt.linecount[j - 1] = fr->brkpt.linecount[j];
fr->brkpt.pc[j - 1] = fr->brkpt.pc[j];
fr->brkpt.pccount[j - 1] = fr->brkpt.pccount[j];
fr->brkpt.prog[j - 1] = fr->brkpt.prog[j];
}
fr->brkpt.count--;
}
fr->brkpt.breaknum = -1;
/**
* @TODO This giant if statement is pretty gnarly; we'd be better
* of looping over an array of callbacks to break this up
* nicer and make it more extensible.
*/
if (!strcasecmp(cmd, "cont")) {
/* Nothing to do -- this will continue to next breakpoint */
} else if (!strcasecmp(cmd, "finish")) {
if (fr->brkpt.count >= MAX_BREAKS) {
notify_nolisten(player,
"Cannot finish because there are too many breakpoints set.", 1);
add_muf_read_event(descr, player, program, fr);
return 0;
}
j = fr->brkpt.count++;
fr->brkpt.temp[j] = 1;
fr->brkpt.level[j] = fr->system.top - 1;
fr->brkpt.line[j] = -1;
fr->brkpt.linecount[j] = -2;
fr->brkpt.pc[j] = NULL;
fr->brkpt.pccount[j] = -2;
fr->brkpt.prog[j] = program;
fr->brkpt.bypass = 1;
return 0;
} else if (!strcasecmp(cmd, "stepi")) {
i = atoi(arg);
if (!i)
i = 1;
if (fr->brkpt.count >= MAX_BREAKS) {
notify_nolisten(player, "Cannot stepi because there are too many breakpoints set.",
1);
add_muf_read_event(descr, player, program, fr);
return 0;
}
j = fr->brkpt.count++;
fr->brkpt.temp[j] = 1;
fr->brkpt.level[j] = -1;
fr->brkpt.line[j] = -1;
fr->brkpt.linecount[j] = -2;
fr->brkpt.pc[j] = NULL;
fr->brkpt.pccount[j] = i;
fr->brkpt.prog[j] = NOTHING;
fr->brkpt.bypass = 1;
return 0;
} else if (!strcasecmp(cmd, "step")) {
i = atoi(arg);
if (!i)
i = 1;
if (fr->brkpt.count >= MAX_BREAKS) {
notify_nolisten(player, "Cannot step because there are too many breakpoints set.",
1);
add_muf_read_event(descr, player, program, fr);
return 0;
}
j = fr->brkpt.count++;
fr->brkpt.temp[j] = 1;
fr->brkpt.level[j] = -1;
fr->brkpt.line[j] = -1;
fr->brkpt.linecount[j] = i;
fr->brkpt.pc[j] = NULL;
fr->brkpt.pccount[j] = -2;
fr->brkpt.prog[j] = NOTHING;
fr->brkpt.bypass = 1;
return 0;
} else if (!strcasecmp(cmd, "nexti")) {
i = atoi(arg);
if (!i)
i = 1;
if (fr->brkpt.count >= MAX_BREAKS) {
notify_nolisten(player, "Cannot nexti because there are too many breakpoints set.",
1);
add_muf_read_event(descr, player, program, fr);
return 0;
}
j = fr->brkpt.count++;
fr->brkpt.temp[j] = 1;
fr->brkpt.level[j] = fr->system.top;
fr->brkpt.line[j] = -1;
fr->brkpt.linecount[j] = -2;
fr->brkpt.pc[j] = NULL;
fr->brkpt.pccount[j] = i;
fr->brkpt.prog[j] = program;
fr->brkpt.bypass = 1;
return 0;
} else if (!strcasecmp(cmd, "next")) {
i = atoi(arg);
if (!i)
i = 1;
if (fr->brkpt.count >= MAX_BREAKS) {
notify_nolisten(player, "Cannot next because there are too many breakpoints set.",
1);
add_muf_read_event(descr, player, program, fr);
return 0;
}
j = fr->brkpt.count++;
fr->brkpt.temp[j] = 1;
fr->brkpt.level[j] = fr->system.top;
fr->brkpt.line[j] = -1;
fr->brkpt.linecount[j] = i;
fr->brkpt.pc[j] = NULL;
fr->brkpt.pccount[j] = -2;
fr->brkpt.prog[j] = program;
fr->brkpt.bypass = 1;
return 0;
} else if (!strcasecmp(cmd, "exec")) {
if (fr->brkpt.count >= MAX_BREAKS) {
notify_nolisten(player,
"Cannot finish because there are too many breakpoints set.", 1);
add_muf_read_event(descr, player, program, fr);
return 0;
}
if (!(pinst = funcname_to_pc(program, arg))) {
notify_nolisten(player, "I don't know a function by that name.", 1);
add_muf_read_event(descr, player, program, fr);
return 0;
}
if (fr->system.top >= STACK_SIZE) {
notify_nolisten(player,
"That would exceed the system stack size for this program.", 1);
add_muf_read_event(descr, player, program, fr);
return 0;
}
fr->system.st[fr->system.top].progref = program;
fr->system.st[fr->system.top++].offset = fr->pc;
fr->pc = pinst;
j = fr->brkpt.count++;
fr->brkpt.temp[j] = 1;
fr->brkpt.level[j] = fr->system.top - 1;
fr->brkpt.line[j] = -1;
fr->brkpt.linecount[j] = -2;
fr->brkpt.pc[j] = NULL;
fr->brkpt.pccount[j] = -2;
fr->brkpt.prog[j] = program;
fr->brkpt.bypass = 1;
return 0;
} else if (!strcasecmp(cmd, "prim")) {
/*
* @TODO The way this works is a little funky. It looks like
* it would be possible to cause some weird havoc if we
* manage to run a primitive that in turn triggers muf_debugger
*
* I am uncertain if this is possible; looks like the only
* way it could happen is by typing 'prim debugger_break'
* but I don't know much about about how muf_debugger is
* triggered. Some digging should be done to make this
* safe.
*
* Even better would be to not use statics for this somehow
* without introducing a memory leak. (tanabi)
*/
if (fr->brkpt.count >= MAX_BREAKS) {
notify_nolisten(player,
"Cannot finish because there are too many breakpoints set.", 1);
add_muf_read_event(descr, player, program, fr);
return 0;
}
if (!primitive(arg)) {
notify_nolisten(player, "I don't recognize that primitive.", 1);
add_muf_read_event(descr, player, program, fr);
return 0;
}
if (fr->system.top >= STACK_SIZE) {
notify_nolisten(player,
"That would exceed the system stack size for this program.", 1);
add_muf_read_event(descr, player, program, fr);
return 0;
}
primset[0].type = PROG_FUNCTION;
primset[0].line = 0;
primset[0].data.mufproc = &temp_muf_proc_data;
primset[0].data.mufproc->vars = 0;
primset[0].data.mufproc->args = 0;
primset[0].data.mufproc->varnames = NULL;
primset[1].type = PROG_PRIMITIVE;
primset[1].line = 0;
primset[1].data.number = get_primitive(arg);
primset[2].type = PROG_PRIMITIVE;
primset[2].line = 0;
primset[2].data.number = IN_RET;
/* primset[3].data.number = primitive("EXIT"); */
fr->system.st[fr->system.top].progref = program;
fr->system.st[fr->system.top++].offset = fr->pc;
fr->pc = &primset[1];
j = fr->brkpt.count++;
fr->brkpt.temp[j] = 1;
fr->brkpt.level[j] = -1;
fr->brkpt.line[j] = -1;
fr->brkpt.linecount[j] = -2;
fr->brkpt.pc[j] = &primset[2];
fr->brkpt.pccount[j] = -2;
fr->brkpt.prog[j] = program;
fr->brkpt.bypass = 1;
fr->brkpt.dosyspop = 1;
return 0;
} else if (!strcasecmp(cmd, "break")) {
add_muf_read_event(descr, player, program, fr);
if (fr->brkpt.count >= MAX_BREAKS) {
notify_nolisten(player, "Too many breakpoints set.", 1);
return 0;
}
if (number(arg)) {
i = atoi(arg);
} else {
if (!(pinst = funcname_to_pc(program, arg))) {
notify_nolisten(player, "I don't know a function by that name.", 1);
return 0;
} else {
i = pinst->line;
}
}
if (!i)
i = fr->pc->line;
j = fr->brkpt.count++;
fr->brkpt.temp[j] = 0;
fr->brkpt.level[j] = -1;
fr->brkpt.line[j] = i;
fr->brkpt.linecount[j] = -2;
fr->brkpt.pc[j] = NULL;
fr->brkpt.pccount[j] = -2;
fr->brkpt.prog[j] = program;
notify_nolisten(player, "Breakpoint set.", 1);
return 0;
} else if (!strcasecmp(cmd, "delete")) {
add_muf_read_event(descr, player, program, fr);
i = atoi(arg);
if (!i) {
notify_nolisten(player, "Which breakpoint did you want to delete?", 1);
return 0;
}
if (i < 1 || i > fr->brkpt.count) {
notify_nolisten(player, "No such breakpoint.", 1);
return 0;
}
j = i - 1;
for (j++; j < fr->brkpt.count; j++) {
fr->brkpt.temp[j - 1] = fr->brkpt.temp[j];
fr->brkpt.level[j - 1] = fr->brkpt.level[j];
fr->brkpt.line[j - 1] = fr->brkpt.line[j];
fr->brkpt.linecount[j - 1] = fr->brkpt.linecount[j];
fr->brkpt.pc[j - 1] = fr->brkpt.pc[j];
fr->brkpt.pccount[j - 1] = fr->brkpt.pccount[j];
fr->brkpt.prog[j - 1] = fr->brkpt.prog[j];
}
fr->brkpt.count--;
notify_nolisten(player, "Breakpoint deleted.", 1);
return 0;
} else if (!strcasecmp(cmd, "breaks")) {
notify_nolisten(player, "Breakpoints:", 1);
for (i = 0; i < fr->brkpt.count; i++) {
ptr = unparse_breakpoint(fr, i);
notify_nolisten(player, ptr, 1);
}
notify_nolisten(player, "*done*", 1);
add_muf_read_event(descr, player, program, fr);
return 0;
} else if (!strcasecmp(cmd, "where")) {
i = atoi(arg);
muf_backtrace(player, program, i, fr);
add_muf_read_event(descr, player, program, fr);
return 0;
} else if (!strcasecmp(cmd, "stack")) {
notify_nolisten(player, "*Argument stack top*", 1);
i = atoi(arg);
if (!i)
i = STACK_SIZE;
ptr = "";
for (j = fr->argument.top; j > 0 && i-- > 0;) {
cnt = 0;
do {
strcpyn(buf, sizeof(buf), ptr);
ptr = insttotext(NULL, 0, &fr->argument.st[--j], buf2, sizeof(buf2), 4000,
program, 1);
cnt++;
} while (!strcasecmp(ptr, buf) && j > 0);
if (cnt > 1)
notifyf(player, " [repeats %d times]", cnt);
if (strcasecmp(ptr, buf))
notifyf(player, "%3d) %s", j + 1, ptr);
}
notify_nolisten(player, "*done*", 1);
add_muf_read_event(descr, player, program, fr);
return 0;
} else if (!strcasecmp(cmd, "list") || !strcasecmp(cmd, "listi")) {
int startline, endline;
add_muf_read_event(descr, player, program, fr);
if ((ptr2 = (char *) strchr(arg, ','))) {
*ptr2++ = '\0';
} else {
ptr2 = "";
}
if (!*arg) {
if (fr->brkpt.lastlisted) {
startline = fr->brkpt.lastlisted + 1;
} else {
startline = fr->pc->line;
}
endline = startline + 15;
} else {
if (!number(arg)) {
if (!(pinst = funcname_to_pc(program, arg))) {
notify_nolisten(player,
"I don't know a function by that name. (starting arg, 1)",
1);
return 0;
} else {
startline = pinst->line;
endline = startline + 15;
}
} else {
if (*ptr2) {
endline = startline = atoi(arg);
} else {
startline = atoi(arg) - 7;
endline = startline + 15;
}
}
}
if (*ptr2) {
if (!number(ptr2)) {
if (!(pinst = funcname_to_pc(program, ptr2))) {
notify_nolisten(player,
"I don't know a function by that name. (ending arg, 1)",
1);
return 0;
} else {
endline = pinst->line;
}
} else {
endline = atoi(ptr2);
}
}
i = (PROGRAM_CODE(program) + PROGRAM_SIZ(program) - 1)->line;
if (startline > i) {
notify_nolisten(player, "Starting line is beyond end of program.", 1);
return 0;
}
if (startline < 1)
startline = 1;
if (endline > i)
endline = i;
if (endline < startline)
endline = startline;
notify_nolisten(player, "Listing:", 1);
if (!strcasecmp(cmd, "listi")) {
for (i = startline; i <= endline; i++) {
pinst = linenum_to_pc(program, i);
if (pinst) {
notifyf_nolisten(player, "line %d: %s", i, (i == fr->pc->line) ?
show_line_prims(program, fr->pc, STACK_SIZE, 1) :
show_line_prims(program, pinst, STACK_SIZE, 0));
}
}
} else {
list_proglines(player, program, fr, startline, endline);
}
fr->brkpt.lastlisted = endline;
notify_nolisten(player, "*done*", 1);
return 0;
} else if (!strcasecmp(cmd, "quit")) {
notify_nolisten(player, "Halting execution.", 1);
return 1;
} else if (!strcasecmp(cmd, "trace")) {
add_muf_read_event(descr, player, program, fr);
if (!strcasecmp(arg, "on")) {
fr->brkpt.showstack = 1;
notify_nolisten(player, "Trace turned on.", 1);
} else if (!strcasecmp(arg, "off")) {
fr->brkpt.showstack = 0;
notify_nolisten(player, "Trace turned off.", 1);
} else {
notifyf_nolisten(player, "Trace is currently %s.",
fr->brkpt.showstack ? "on" : "off");
}
return 0;
} else if (!strcasecmp(cmd, "words")) {
list_program_functions(player, program, arg);
add_muf_read_event(descr, player, program, fr);
return 0;
} else if (!strcasecmp(cmd, "print")) {
debug_printvar(player, program, fr, arg);
add_muf_read_event(descr, player, program, fr);
return 0;
} else if (!strcasecmp(cmd, "push")) {
push_arg(player, fr, arg);
add_muf_read_event(descr, player, program, fr);
return 0;
} else if (!strcasecmp(cmd, "pop")) {
add_muf_read_event(descr, player, program, fr);
if (fr->argument.top < 1) {
notify_nolisten(player, "Nothing to pop.", 1);
return 0;
}
fr->argument.top--;
CLEAR(fr->argument.st + fr->argument.top);
notify_nolisten(player, "Stack item popped.", 1);
return 0;
} else if (!strcasecmp(cmd, "help")) {
do_helpfile(player, tp_file_man_dir, tp_file_man, "debugger_commands", "");
return 0;
} else {
notify_nolisten(player,
"I don't understand that debugger command. Type 'help' for help.", 1);
add_muf_read_event(descr, player, program, fr);
return 0;
}
return 0;
}
/**
* Displays a MUF Backtrace message.
*
* This is used when a MUF program is aborted, if someone who has 'controls'
* permissions was running it, or if you type 'where' in the debugger.
* Shows a fairly straight forward backtrace, going 'count' deep. If
* 'count' is 0, it will display up to STACK_SIZE depth.
*
* @param player the player getting the backtrace
* @param program the program being backtraced
* @param count the depth of the trace, or 0 for STACK_SIZE
* @param fr the frame pointer
*/
void
muf_backtrace(dbref player, dbref program, int count, struct frame *fr)
{
char buf2[BUFFER_LEN];
char buf3[BUFFER_LEN];
char *ptr;
dbref ref;
int i, j, cnt, flag;
struct inst *pinst, *lastinst;
int lev;
notify_nolisten(player, "\033[1;33;40mSystem stack backtrace:\033[0m", 1);
i = count;
if (!i)
i = STACK_SIZE;
ref = program;
pinst = NULL;
j = fr->system.top + 1;
/*
* i is our depth; iterate until we've run out of depth or we have
* broken out of the loop
*/
while (j > 1 && i-- > 0) {
cnt = 0;
do {
lastinst = pinst;
if (--j == fr->system.top) {
pinst = fr->pc;
} else {
ref = fr->system.st[j].progref;
pinst = fr->system.st[j].offset;
}
ptr = unparse_sysreturn(&ref, pinst);
cnt++;
} while (pinst == lastinst && j > 1);
if (cnt > 1) {
notifyf_nolisten(player, " [repeats %d times]", cnt);
}
lev = fr->system.top - j;
if (ptr) {
int snplen;
char *bufend = buf2;
struct inst *fntop = fr->pc;
struct inst *varinst;
while (fntop->type != PROG_FUNCTION)
fntop--;
snplen = snprintf(buf2, sizeof(buf2), "%.512s\033[1m(\033[0m", ptr);
if (snplen == -1) {
buf2[sizeof(buf2) - 1] = '\0';
snplen = sizeof(buf2) - 1;
}
bufend += snplen;
for (int k = 0; k < fntop->data.mufproc->args; k++) {
const char *nam = scopedvar_getname(fr, lev, k);
char *val;
if (!nam) {
break;
}
varinst = scopedvar_get(fr, lev, k);
val = insttotext(fr, lev, varinst, buf3, sizeof(buf3), 30, program, 1);
if (k) {
bufend += snprintf(bufend, buf2 - bufend - 18, "\033[1m, %s=\033[0m%s", nam, val);
} else {
bufend += snprintf(bufend, buf2 - bufend - 18, "\033[1m%s=\033[0m%s", nam, val);
}
}
ptr = buf2;
}
if (pinst != lastinst) {
notifyf_nolisten(player, "\033[1;33;40m%3d)\033[0m \033[1m%s(#%d)\033[0m %s:", lev,
NAME(ref), ref, ptr);
flag = ((FLAGS(player) & INTERNAL) ? 1 : 0);
FLAGS(player) &= ~INTERNAL;
list_proglines(player, ref, fr, pinst->line, 0);
if (flag) {
FLAGS(player) |= INTERNAL;
}
}
}
notify_nolisten(player, "\033[1;33;40m*done*\033[0m", 1);
}
void
muf_backtrace(dbref player, dbref program, int count, struct frame *fr)
{
char buf[BUFFER_LEN];
char buf2[BUFFER_LEN];
char buf3[BUFFER_LEN];
char *ptr;
dbref ref;
int i, j, cnt, flag;
struct inst *pinst, *lastinst;
int lev;
anotify_nolisten(player, CINFO "System stack backtrace:", 1);
i = count;
if (!i)
i = STACK_SIZE;
ref = program;
pinst = NULL;
j = fr->system.top + 1;
while (j > 1 && i-- > 0) {
cnt = 0;
do {
lastinst = pinst;
if (--j == fr->system.top) {
pinst = fr->pc + 1;
} else {
ref = fr->system.st[j].progref;
pinst = fr->system.st[j].offset;
}
ptr = unparse_sysreturn(&ref, pinst);
cnt++;
} while (pinst == lastinst && j > 1);
if (cnt > 1) {
sprintf(buf, " [repeats %d times]", cnt);
notify_nolisten(player, buf, 1);
}
lev = fr->system.top - j;
if (ptr) {
int k;
char *bufend = buf2;
struct inst *fntop = fr->pc;
struct inst *varinst;
while (fntop->type != PROG_FUNCTION)
--fntop;
bufend += sprintf(buf2, "%.512s" SYSWHITE "(" SYSNORMAL, ptr);
for (k = 0; k < fntop->data.mufproc->args; ++k) {
const char *nam = scopedvar_getname(fr, lev, k);
char *val;
const char *fmt;
if (!nam) {
break;
}
varinst = scopedvar_get(fr, lev, k);
val = insttotext(fr, lev, varinst, buf3, sizeof(buf3), 30,
program);
if (k) {
fmt = SYSWHITE ", %s=" SYSNORMAL "%s";
} else {
fmt = SYSWHITE "%s=" SYSNORMAL "%s";
}
bufend += snprintf(bufend, buf2 - bufend - 18, fmt, nam, val);
}
bufend += snprintf(bufend, buf2 - bufend - 1, SYSWHITE ")" SYSNORMAL,
ptr);
ptr = buf2;
}
if (pinst != lastinst) {
sprintf(buf, "%3d) %s(#%d) %s:", j, NAME(ref), ref, ptr);
notify_nolisten(player, buf, 1);
flag = ((FLAGS(player) & INTERNAL) ? 1 : 0);
FLAGS(player) &= ~INTERNAL;
list_proglines(player, ref, fr, (pinst - 1)->line, 0);
if (flag) {
FLAGS(player) |= INTERNAL;
}
}
}
anotify_nolisten(player, CINFO "Done.", 1);
}