mirror of
https://github.com/ilyakooo0/urbit.git
synced 2024-12-25 07:52:59 +03:00
Fix out of memory on stack overflow.
This commit is contained in:
parent
656e7569f1
commit
5d707603c4
49
n/m.c
49
n/m.c
@ -188,6 +188,47 @@ _cm_signal_reset(void)
|
||||
u3R->kid_u = 0;
|
||||
}
|
||||
|
||||
/* _cm_stack_recover(): recover stack trace, with lacunae.
|
||||
*/
|
||||
static u3_noun
|
||||
_cm_stack_recover(u3a_road* rod_u)
|
||||
{
|
||||
c3_w len_w;
|
||||
|
||||
len_w = 0;
|
||||
{
|
||||
u3_noun tax = rod_u->bug.tax;
|
||||
|
||||
while ( tax ) {
|
||||
len_w++;
|
||||
tax = u3t(tax);
|
||||
}
|
||||
|
||||
if ( len_w < 4096 ) {
|
||||
return u3a_take(rod_u->bug.tax);
|
||||
}
|
||||
else {
|
||||
u3_noun beg, fin;
|
||||
c3_w i_w;
|
||||
|
||||
tax = rod_u->bug.tax;
|
||||
beg = u3_nul;
|
||||
for ( i_w = 0; i_w < 2048; i_w++ ) {
|
||||
beg = u3nc(u3a_take(u3h(tax)), beg);
|
||||
tax = u3t(tax);
|
||||
}
|
||||
beg = u3kb_flop(beg);
|
||||
|
||||
for ( i_w = 0; i_w < (len_w - 4096); i_w++ ) {
|
||||
tax = u3t(tax);
|
||||
}
|
||||
fin = u3nc(u3nc(c3__lose, c3__over), u3a_take(tax));
|
||||
|
||||
return u3kb_weld(beg, fin);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/* _cm_signal_recover(): recover from a deep signal, after longjmp. Free arg.
|
||||
*/
|
||||
static u3_noun
|
||||
@ -235,9 +276,13 @@ _cm_signal_recover(c3_l sig_l, u3_noun arg)
|
||||
|
||||
u3R = &(u3H->rod_u);
|
||||
rod_u = u3R;
|
||||
|
||||
|
||||
while ( rod_u->kid_u ) {
|
||||
tax = u3kb_weld(u3a_take(rod_u->kid_u->bug.tax), tax);
|
||||
#if 0
|
||||
fprintf(stderr, "collecting %d frames\r\n",
|
||||
u3kb_lent(rod_u->kid_u->bug.tax));
|
||||
#endif
|
||||
tax = u3kb_weld(_cm_stack_recover(rod_u->kid_u), tax);
|
||||
rod_u = rod_u->kid_u;
|
||||
}
|
||||
}
|
||||
|
Loading…
Reference in New Issue
Block a user