/**
* 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);
}