/* look for a matching exc_list; return 1 if one is found,
otherwise add this one to the list and return 0 */
static int check_exc_list(char *addr, unsigned long code, char *stk,
struct frame *fp)
{
struct exc_list *l, *ll;
struct frame *f;
int i, n;
if (list) {
for (l = list; l; ll = l, l = l->next) {
if (l->addr != addr || l->code != code)
continue;
if (log_depth < 1 || l->nstack < 1)
return 1;
if (l->stack[0] != stk)
continue;
n = 1;
for (i = 1, f = fp; i < log_depth && i < l->nstack &&
f && f->fr_savpc; i++, f = FRAMEP(f->fr_savfp))
if (l->stack[i] != (char *)f->fr_savpc) {
n = 0;
break;
}
if (n)
return 1;
}
}
/* create a new exc_list structure and tack it on the list */
for (n = 1, f = fp; n < log_depth && f && f->fr_savpc;
n++, f = FRAMEP(f->fr_savfp)) ;
if ((l = (struct exc_list *)malloc(sizeof(struct exc_list) +
(n - 1) * sizeof(char *))) != NULL) {
l->next = NULL;
l->addr = addr;
l->code = code;
l->nstack = ((log_depth < 1)? 0 : n);
l->stack[0] = stk;
for (i = 1; i < n; i++) {
l->stack[i] = (char *)fp->fr_savpc;
fp = FRAMEP(fp->fr_savfp);
}
if (list)
ll->next = l;
else
list = l;
}
return 0;
}
void fex_log_entry(const char *msg)
{
ucontext_t uc;
struct frame *fp;
char *stk;
int fd;
/* if logging is disabled, just return */
mutex_lock(&log_lock);
if (log_fp == NULL) {
mutex_unlock(&log_lock);
return;
}
/* get the frame pointer from the current context and
pop our own frame */
getcontext(&uc);
#if defined(__sparc) || defined(__amd64)
fp = FRAMEP(uc.uc_mcontext.gregs[REG_SP]);
#elif defined(__i386) /* !defined(__amd64) */
fp = FRAMEP(uc.uc_mcontext.gregs[EBP]);
#else
#error Unknown architecture
#endif
if (fp == NULL) {
mutex_unlock(&log_lock);
return;
}
stk = (char *)fp->fr_savpc;
fp = FRAMEP(fp->fr_savfp);
/* if we've already logged this message here, don't make an entry */
if (check_exc_list(stk, (unsigned long)msg, stk, fp)) {
mutex_unlock(&log_lock);
return;
}
/* make an entry */
fd = fileno(log_fp);
write(fd, "fex_log_entry: ", 15);
write(fd, msg, strlen(msg));
write(fd, "\n", 1);
__fex_sym_init();
print_stack(fd, stk, fp);
mutex_unlock(&log_lock);
}
struct console *
decode_console (Lisp_Object console)
{
if (NILP (console))
console = Fselected_console ();
/* quietly accept devices and frames for the console arg */
if (DEVICEP (console) || FRAMEP (console))
console = DEVICE_CONSOLE (decode_device (console));
CHECK_LIVE_CONSOLE (console);
return XCONSOLE (console);
}
static struct frame *
frame_for_x_selection (Lisp_Object object)
{
Lisp_Object tail;
struct frame *f;
if (NILP (object))
{
f = XFRAME (selected_frame);
if (FRAME_MAC_P (f) && FRAME_LIVE_P (f))
return f;
for (tail = Vframe_list; CONSP (tail); tail = XCDR (tail))
{
f = XFRAME (XCAR (tail));
if (FRAME_MAC_P (f) && FRAME_LIVE_P (f))
return f;
}
}
else if (TERMINALP (object))
{
struct terminal *t = get_terminal (object, 1);
if (t->type == output_mac)
{
for (tail = Vframe_list; CONSP (tail); tail = XCDR (tail))
{
f = XFRAME (XCAR (tail));
if (FRAME_LIVE_P (f) && f->terminal == t)
return f;
}
}
}
else if (FRAMEP (object))
{
f = XFRAME (object);
if (FRAME_MAC_P (f) && FRAME_LIVE_P (f))
return f;
}
return NULL;
}
static void print_stack(int fd, char *addr, struct frame *fp)
{
int i;
char *name, buf[30];
for (i = 0; i < log_depth && addr != NULL; i++) {
if (__fex_sym(addr, &name) != NULL) {
write(fd, buf, sprintf(buf, " 0x%0" PDIG "lx ",
(long)addr));
write(fd, name, strlen(name));
write(fd, "\n", 1);
if (!strcmp(name, "main"))
break;
} else {
write(fd, buf, sprintf(buf, " 0x%0" PDIG "lx\n",
(long)addr));
}
if (fp == NULL)
break;
addr = (char *)fp->fr_savpc;
fp = FRAMEP(fp->fr_savfp);
}
}
void
__fex_mklog(ucontext_t *uap, char *addr, int f, enum fex_exception e,
int m, void *p)
{
struct frame *fp;
char *stk, *name, buf[30];
int fd;
/* if logging is disabled, just return */
mutex_lock(&log_lock);
if (log_fp == NULL) {
mutex_unlock(&log_lock);
return;
}
/* get stack info */
#if defined(__sparc)
stk = (char*)uap->uc_mcontext.gregs[REG_PC];
fp = FRAMEP(uap->uc_mcontext.gregs[REG_SP]);
#elif defined(__amd64)
stk = (char*)uap->uc_mcontext.gregs[REG_PC];
fp = FRAMEP(uap->uc_mcontext.gregs[REG_RBP]);
#elif defined(__i386) /* !defined(__amd64) */
stk = (char*)uap->uc_mcontext.gregs[PC];
fp = FRAMEP(uap->uc_mcontext.gregs[EBP]);
#else
#error Unknown architecture
#endif
/* if the handling mode is the default and this exception's
flag is already raised, don't make an entry */
if (m == FEX_NONSTOP) {
switch (e) {
case fex_inexact:
if (f & FE_INEXACT) {
mutex_unlock(&log_lock);
return;
}
break;
case fex_underflow:
if (f & FE_UNDERFLOW) {
mutex_unlock(&log_lock);
return;
}
break;
case fex_overflow:
if (f & FE_OVERFLOW) {
mutex_unlock(&log_lock);
return;
}
break;
case fex_division:
if (f & FE_DIVBYZERO) {
mutex_unlock(&log_lock);
return;
}
break;
default:
if (f & FE_INVALID) {
mutex_unlock(&log_lock);
return;
}
break;
}
}
/* if we've already logged this exception at this address,
don't make an entry */
if (check_exc_list(addr, (unsigned long)e, stk, fp)) {
mutex_unlock(&log_lock);
return;
}
/* make an entry */
fd = fileno(log_fp);
write(fd, "Floating point ", 15);
write(fd, exception[e], strlen(exception[e]));
write(fd, buf, sprintf(buf, " at 0x%0" PDIG "lx", (long)addr));
__fex_sym_init();
if (__fex_sym(addr, &name) != NULL) {
write(fd, " ", 1);
write(fd, name, strlen(name));
}
switch (m) {
case FEX_NONSTOP:
write(fd, ", nonstop mode\n", 15);
break;
case FEX_ABORT:
write(fd, ", abort\n", 8);
break;
case FEX_NOHANDLER:
if (p == (void *)SIG_DFL) {
write(fd, ", handler: SIG_DFL\n", 19);
break;
}
else if (p == (void *)SIG_IGN) {
write(fd, ", handler: SIG_IGN\n", 19);
break;
}
/* fall through*/
default:
write(fd, ", handler: ", 11);
if (__fex_sym((char *)p, &name) != NULL) {
write(fd, name, strlen(name));
write(fd, "\n", 1);
} else {
write(fd, buf, sprintf(buf, "0x%0" PDIG "lx\n",
(long)p));
}
break;
}
print_stack(fd, stk, fp);
mutex_unlock(&log_lock);
}