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urbit/v/loop.c
C. Guy Yarvin a5fee9936b Various fixes and improvements.
2014-01-27 11:09:56 -08:00

2017 lines
41 KiB
C
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/* v/loop.c
**
** This file is in the public domain.
*/
#include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>
#include <setjmp.h>
#include <gmp.h>
#include <sigsegv.h>
#include <stdint.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <uv.h>
#include <errno.h>
#include <curses.h>
#include <termios.h>
#include <term.h>
#include "all.h"
#include "v/vere.h"
#define AMES
#if defined(U2_OS_linux)
#include <stdio_ext.h>
#define fpurge(fd) __fpurge(fd)
#define DEVRANDOM "/dev/urandom"
#else
#define DEVRANDOM "/dev/random"
#endif
static jmp_buf Signal_buf;
#ifndef SIGSTKSZ
# define SIGSTKSZ 16384
#endif
static uint8_t Sigstk[SIGSTKSZ];
typedef enum {
sig_none,
sig_overflow,
sig_interrupt,
sig_terminate,
sig_memory,
sig_assert,
sig_timer
} u2_kill;
volatile u2_kill Sigcause; // reasons for exception
static void
_lo_signal_handle_over(int emergency, stackoverflow_context_t scp)
{
if ( u2_Critical ) {
// Careful not to grow the stack during critical sections.
//
write(2, "stack disaster\n", strlen("stack disaster" + 2));
abort();
}
#if 0
if ( 1 == emergency ) {
write(2, "stack emergency\n", strlen("stack emergency" + 2));
abort();
} else
#endif
{
Sigcause = sig_overflow;
longjmp(Signal_buf, 1);
}
}
static void
_lo_signal_handle_term(int x)
{
if ( !u2_Critical ) {
Sigcause = sig_terminate;
u2_Host.liv = u2_no;
longjmp(Signal_buf, 1);
}
}
static void
_lo_signal_handle_intr(int x)
{
if ( !u2_Critical ) {
Sigcause = sig_interrupt;
longjmp(Signal_buf, 1);
}
}
static void
_lo_signal_handle_alrm(int x)
{
if ( !u2_Critical ) {
Sigcause = sig_timer;
longjmp(Signal_buf, 1);
}
}
/* _lo_signal_done():
*/
static void
_lo_signal_done()
{
// signal(SIGINT, SIG_IGN);
signal(SIGTERM, SIG_IGN);
signal(SIGVTALRM, SIG_IGN);
stackoverflow_deinstall_handler();
{
struct itimerval itm_u;
timerclear(&itm_u.it_interval);
timerclear(&itm_u.it_value);
setitimer(ITIMER_VIRTUAL, &itm_u, 0);
}
u2_unix_ef_move();
}
/* _lo_signal_deep(): start deep processing; set timer for sec_w or 0.
*/
static void
_lo_signal_deep(c3_w sec_w)
{
u2_unix_ef_hold();
stackoverflow_install_handler(_lo_signal_handle_over, Sigstk, SIGSTKSZ);
signal(SIGINT, _lo_signal_handle_intr);
signal(SIGTERM, _lo_signal_handle_term);
{
struct itimerval itm_u;
timerclear(&itm_u.it_interval);
itm_u.it_value.tv_sec = sec_w;
itm_u.it_value.tv_usec = 0;
setitimer(ITIMER_VIRTUAL, &itm_u, 0);
}
signal(SIGVTALRM, _lo_signal_handle_alrm);
}
/* u2_loop_signal_memory(): end computation for out-of-memory.
*/
void
u2_loop_signal_memory()
{
fprintf(stderr, "\r\nout of memory\r\n");
Sigcause = sig_memory;
longjmp(Signal_buf, 1);
}
/* _lo_init(): initialize I/O across the process.
*/
static void
_lo_init()
{
u2_unix_io_init();
u2_ames_io_init();
u2_term_io_init();
u2_http_io_init();
u2_save_io_init();
u2_batz_io_init();
}
/* _lo_talk(): bring up listeners across the process.
*/
static void
_lo_talk()
{
u2_unix_io_talk();
u2_ames_io_talk();
u2_http_io_talk();
}
/* _lo_exit(): terminate I/O across the process.
*/
static void
_lo_exit(void)
{
u2_unix_io_exit();
u2_ames_io_exit();
u2_term_io_exit();
u2_http_io_exit();
u2_save_io_exit();
u2_batz_io_exit();
}
/* _lo_poll(): reset event flags across the process.
*/
static void
_lo_poll(void)
{
u2_ames_io_poll();
u2_http_io_poll();
u2_term_io_poll();
u2_save_io_poll();
u2_unix_io_poll();
u2_batz_io_poll();
}
#if 0
/* _lo_how(): print how.
*/
static const c3_c*
_lo_how(u2_noun how)
{
switch ( how ) {
default: c3_assert(0); break;
case c3__ames: return "ames";
case c3__batz: return "batz";
case c3__term: return "cons";
case c3__htcn: return "http-conn";
case c3__htls: return "http-lisn";
case c3__save: return "save";
case c3__unix: return "unix";
}
}
#endif
/* u2_lo_bail(): clean up all event state.
*/
void
u2_lo_bail(u2_reck* rec_u)
{
fflush(stdout);
_lo_exit();
exit(1);
}
int c3_cooked() { _lo_exit(); return 0; }
/* _lo_tape(): dump a tape, old style. Don't do this.
*/
static void
_lo_tape(u2_reck* rec_u, FILE* fil_u, u2_noun tep)
{
u2_noun tap = tep;
while ( u2_nul != tap ) {
c3_c car_c;
if ( u2h(tap) >= 127 ) {
car_c = '?';
} else car_c = u2h(tap);
putc(car_c, fil_u);
tap = u2t(tap);
}
u2z(tep);
}
/* _lo_wall(): dump a wall, old style. Don't do this.
*/
static void
_lo_wall(u2_reck* rec_u, u2_noun wol)
{
FILE* fil_u = u2_term_io_hija();
u2_noun wal = wol;
while ( u2_nul != wal ) {
_lo_tape(rec_u, fil_u, u2k(u2h(wal)));
putc(13, fil_u);
putc(10, fil_u);
wal = u2t(wal);
}
u2_term_io_loja(0);
u2z(wol);
}
/* u2_lo_tank(): dump single tank.
*/
void
u2_lo_tank(c3_l tab_l, u2_noun tac)
{
u2_lo_punt(tab_l, u2nc(tac, u2_nul));
}
/* u2_lo_punt(): dump tank list.
*/
void
u2_lo_punt(c3_l tab_l, u2_noun tac)
{
u2_noun blu = u2_term_get_blew(0);
c3_l col_l = u2h(blu);
u2_noun cat = tac;
// We are calling nock here, but hopefully need no protection.
//
while ( u2_yes == u2_cr_du(cat) ) {
u2_noun wol = u2_dc("wash", u2nc(tab_l, col_l), u2k(u2h(cat)));
_lo_wall(u2_Arv, wol);
cat = u2t(cat);
}
u2z(tac);
u2z(blu);
}
/* u2_lo_sway(): print trace.
*/
void
u2_lo_sway(c3_l tab_l, u2_noun tax)
{
u2_noun mok = u2_dc("mook", 2, tax);
u2_lo_punt(tab_l, u2k(u2t(mok)));
u2z(mok);
}
/* _lo_soft(): standard soft wrapper. unifies unix and nock errors.
**
** Produces [%$ result] or [%error (list tank)].
*/
static u2_noun
_lo_soft(u2_reck* rec_u, c3_w sec_w, u2_funk fun_f, u2_noun arg)
{
u2_noun hoe, pro, rop;
u2_rl_leap(u2_Wire, c3__rock);
// system level setjmp, for signals
//
c3_assert(u2_nul == u2_wire_tax(u2_Wire));
c3_assert(0 == u2_wire_kit_r(u2_Wire));
// stop signals
//
u2_unix_ef_hold();
_lo_signal_deep(sec_w);
if ( 0 != setjmp(Signal_buf) ) {
u2_noun tax, pre, mok;
// return to blank state
//
_lo_signal_done();
// acquire trace and reset memory
//
tax = u2_wire_tax(u2_Wire);
u2_rl_fall(u2_Wire);
u2z(arg);
tax = u2_rl_take(u2_Wire, tax);
u2_wire_tax(u2_Wire) = u2_nul;
mok = u2_dc("mook", 2, tax);
// other ugly disgusting cleanups
{
u2_wire_kit_r(u2_Wire) = 0;
u2_hevx_be(u2_wire_hev_r(u2_Wire), u2_pryr, god) = 0;
u2_hevx_at(u2_wire_hev_r(u2_Wire), lad) = 0;
}
switch ( Sigcause ) {
default: pre = c3__wyrd; break;
case sig_none: pre = c3__none; break;
case sig_overflow: pre = c3__over; break;
case sig_interrupt: pre = c3__intr; break;
case sig_terminate: pre = c3__term; break;
case sig_memory: pre = c3__full; break;
case sig_assert: pre = c3__lame; break;
case sig_timer: fprintf(stderr, "timer!!\r\n"); pre = c3__slow; break;
}
rop = u2nc(pre, u2k(u2t(mok)));
u2z(mok);
fprintf(stderr, "error computed\r\n");
return rop;
}
if ( 0 != (hoe = u2_cm_trap()) ) {
u2_noun mok;
u2_rl_fall(u2_Wire);
hoe = u2_rl_take(u2_Wire, hoe);
u2_rl_flog(u2_Wire);
mok = u2_dc("mook", 2, u2k(u2t(hoe)));
rop = u2nc(u2k(u2h(hoe)), u2k(u2t(mok)));
u2z(arg);
u2z(hoe);
u2z(mok);
}
else {
u2_noun pro = fun_f(rec_u, arg);
_lo_signal_done();
u2_cm_done();
u2_rl_fall(u2_Wire);
pro = u2_rl_take(u2_Wire, pro);
u2_rl_flog(u2_Wire);
u2z(arg);
rop = u2nc(u2_blip, pro);
}
pro = rop;
return pro;
}
#if 0
/* _lo_hard(): standard hard wrapper. Produces result and/or asserts.
*/
static u2_noun
_lo_hard(u2_reck* rec_u, u2_funk fun_f, u2_noun arg)
{
u2_noun pro = _lo_soft(rec_u, 0, fun_f, arg);
if ( u2_blip == u2h(pro) ) {
u2_noun poo = u2k(u2t(pro));
u2z(pro); return poo;
}
else {
u2_lo_punt(2, u2k(u2t(pro)));
u2z(pro);
c3_assert(0);
}
}
#endif
/* _lo_mung(): formula wrapper with gate and sample.
*/
static u2_noun
_lo_mung_in(u2_reck* rec_u, u2_noun gam)
{
u2_noun pro = u2_cn_mung(u2k(u2h(gam)), u2k(u2t(gam)));
u2z(gam); return pro;
}
static u2_noun
_lo_mung(u2_reck* rec_u, c3_w sec_w, u2_noun gat, u2_noun sam)
{
u2_noun gam = u2nc(gat, sam);
return _lo_soft(rec_u, 0, _lo_mung_in, gam);
}
/* _lo_pack(): save an ovum at the present time. sync; sync; sync.
*/
static void
_lo_pack(u2_reck* rec_u, u2_noun ron)
{
u2_ulog* lug_u = &u2_Host.lug_u;
c3_w len_w;
c3_d tar_d;
c3_w* img_w;
u2_ular lar_u;
if ( rec_u->key ) {
ron = u2_dc("en:crya", u2k(rec_u->key), ron);
}
len_w = u2_cr_met(5, ron);
tar_d = (lug_u->len_d + len_w);
lar_u.syn_w = u2_mug((c3_w)tar_d);
lar_u.mug_w = u2_mug(ron);
lar_u.ent_w = rec_u->ent_w;
lar_u.len_w = len_w;
// XX: this is not in any way, shape or form a proper 2PC!
//
if ( -1 == lseek64(lug_u->fid_i, 4ULL * tar_d, SEEK_SET) ) {
perror("lseek");
uL(fprintf(uH, "lo_save: seek failed\n"));
c3_assert(0);
}
if ( sizeof(lar_u) != write(lug_u->fid_i, &lar_u, sizeof(lar_u)) ) {
perror("write");
uL(fprintf(uH, "lo_save: write failed\n"));
c3_assert(0);
}
if ( -1 == lseek64(lug_u->fid_i, 4ULL * lug_u->len_d, SEEK_SET) ) {
perror("lseek");
uL(fprintf(uH, "lo_save: seek failed\n"));
c3_assert(0);
}
#if 0
uL(fprintf(uH, "log: write: at %d, %d: lar ent %d, len %d, mug %x\n",
lug_u->len_w,
tar_w,
lar_u.ent_w,
lar_u.len_w,
lar_u.mug_w));
#endif
img_w = malloc(4 * len_w);
u2_cr_words(0, len_w, img_w, ron);
u2z(ron);
if ( (4 * len_w) != write(lug_u->fid_i, img_w, (4 * len_w)) ) {
perror("lseek");
uL(fprintf(uH, "lo_save: write failed\n"));
c3_assert(0);
}
lug_u->len_d += (c3_d)(lar_u.len_w + c3_wiseof(lar_u));
free(img_w);
// Sync. Or, what goes by sync.
{
fsync(lug_u->fid_i); // fsync is useless, F_FULLFSYNC too slow
}
}
/* _lo_save(): log an ovum at the present time.
*/
static void
_lo_save(u2_reck* rec_u, u2_noun ovo)
{
u2_noun ron = u2_cke_jam(u2nc(u2k(rec_u->now), ovo));
if ( u2_Host.lug_u.len_d ) {
_lo_pack(rec_u, ron);
rec_u->ent_w += 1;
} else {
rec_u->roe = u2nc(ron, rec_u->roe);
}
}
/* _lo_pike(): poke with floating core.
*/
static u2_noun
_lo_pike(u2_reck* rec_u, u2_noun ovo, u2_noun cor)
{
u2_noun fun = u2_cn_nock(cor, u2k(u2_cx_at(42, cor)));
u2_noun sam = u2nc(u2k(rec_u->now), ovo);
return _lo_mung(rec_u, 0, fun, sam);
}
/* _lo_sure(): apply and save an input ovum and its result.
*/
static void
_lo_sure(u2_reck* rec_u, u2_noun ovo, u2_noun vir, u2_noun cor)
{
// Whatever worked, save it. (XX - should be concurrent with execute.)
// We'd like more events that don't change the state but need work here.
{
u2_mug(cor);
u2_mug(rec_u->roc);
#if 0
if ( (c3__belt == u2h(u2t(ovo))) &&
(c3__ctl == u2h(u2t(u2t(ovo)))) &&
('g' == u2t(u2t(u2t(ovo)))) )
{
if ( u2_yes == u2_sing(cor, rec_u->roc) ) {
uL(fprintf(uH, "bell matches\n"));
} else {
uL(fprintf(uH, "bell does NOT match\n"));
}
}
if ( c3__noop == u2h(u2t(ovo)) ) {
if ( u2_yes == u2_sing(cor, rec_u->roc) ) {
uL(fprintf(uH, "noop matches\n"));
} else {
uL(fprintf(uH, "noop does NOT match\n"));
}
}
#endif
if ( u2_no == u2_sing(cor, rec_u->roc) ) {
_lo_save(rec_u, u2k(ovo));
u2z(rec_u->roc);
rec_u->roc = cor;
}
else {
u2z(cor);
}
u2z(ovo);
}
// Evaluate external side effects. Not allowed to fail.
//
{
while ( u2_nul != vir ) {
u2_noun ovo = u2k(u2h(vir));
u2_noun nex = u2k(u2t(vir));
// c3_c* hed_c = u2_cr_string(u2h(u2t(ovo)));
u2z(vir); vir = nex;
// uL(fprintf(uH, "kick: %s\n", hed_c));
u2_reck_kick(rec_u, ovo);
}
}
}
/* _lo_lame(): handle an application failure.
*/
static void
_lo_lame(u2_reck* rec_u, u2_noun ovo, u2_noun why, u2_noun tan)
{
u2_noun bov, gon;
#if 1
{
c3_c* oik_c = u2_cr_string(u2h(u2t(ovo)));
// uL(fprintf(uH, "lame: %s\n", oik_c));
free(oik_c);
}
#endif
// Formal error in a network packet generates a hole card.
//
// There should be a separate path for crypto failures,
// to prevent timing attacks, but isn't right now. To deal
// with a crypto failure, just drop the packet.
//
if ( (c3__exit == why) && (c3__hear == u2h(u2t(ovo))) ) {
u2_lo_punt(2, u2_ckb_flop(u2k(tan)));
bov = u2nc(u2k(u2h(ovo)), u2nc(c3__hole, u2k(u2t(u2t(ovo)))));
u2z(why);
}
else {
bov = u2nc(u2k(u2h(ovo)), u2nt(c3__crud, why, u2k(tan)));
u2_hevn_at(lad) = u2_nul;
}
// u2_lo_show("data", u2k(u2t(u2t(ovo))));
u2z(ovo);
gon = _lo_soft(rec_u, 0, u2_reck_poke, u2k(bov));
if ( u2_blip == u2h(gon) ) {
_lo_sure(rec_u, bov, u2k(u2h(u2t(gon))), u2k(u2t(u2t(gon))));
u2z(gon);
}
else {
u2z(gon);
{
u2_noun vab = u2nc(u2k(u2h(bov)),
u2nc(c3__warn, u2_ci_tape("crude crash!")));
u2_noun nog = _lo_soft(rec_u, 0, u2_reck_poke, u2k(vab));
if ( u2_blip == u2h(nog) ) {
_lo_sure(rec_u, vab, u2k(u2h(u2t(nog))), u2k(u2t(u2t(nog))));
u2z(nog);
}
else {
u2z(nog);
u2z(vab);
uL(fprintf(uH, "crude: all delivery failed!\n"));
}
}
}
}
static void _lo_punk(u2_reck* rec_u, u2_noun ovo);
/* _lo_nick(): transform enveloped packets, [vir cor].
*/
static u2_noun
_lo_nick(u2_reck* rec_u, u2_noun vir, u2_noun cor)
{
if ( u2_nul == vir ) {
return u2nt(u2_blip, vir, cor);
}
else {
u2_noun i_vir = u2h(vir);
u2_noun pi_vir, qi_vir;
u2_noun vix;
if ( (u2_yes == u2_cr_cell((i_vir=u2h(vir)), &pi_vir, &qi_vir)) &&
(u2_yes == u2du(qi_vir)) &&
(c3__hear == u2h(qi_vir)) )
{
u2_noun gon;
gon = _lo_pike(rec_u, u2k(i_vir), cor);
if ( u2_blip != u2h(gon) ) {
u2z(vir);
return gon;
}
else {
u2_noun viz;
vix = u2k(u2h(u2t(gon)));
cor = u2k(u2t(u2t(gon)));
u2z(gon);
viz = u2_ckb_weld(vix, u2k(u2t(vir)));
u2z(vir);
return _lo_nick(rec_u, viz, cor);
}
}
else {
u2_noun nez = _lo_nick(rec_u, u2k(u2t(vir)), cor);
if ( u2_blip != u2h(nez) ) {
u2z(vir);
return nez;
} else {
u2_noun viz;
viz = u2nc(u2k(i_vir), u2k(u2h(u2t(nez))));
cor = u2k(u2t(u2t(nez)));
u2z(vir);
u2z(nez);
return u2nt(u2_blip, viz, cor);
}
}
}
}
/* _lo_punk(): insert and apply an input ovum (unprotected).
*/
static void
_lo_punk(u2_reck* rec_u, u2_noun ovo)
{
// c3_c* txt_c = u2_cr_string(u2h(u2t(ovo)));
c3_w sec_w;
// static c3_w num_w;
u2_noun gon;
// uL(fprintf(uH, "punk: %s: %d\n", u2_cr_string(u2h(u2t(ovo))), num_w++));
// XX this is wrong - the timer should be on the original hose.
//
if ( (c3__term == u2h(u2t(u2h(ovo)))) ||
(c3__batz == u2h(u2t(u2h(ovo)))) ) {
sec_w = 0;
} else sec_w = 60;
// Control alarm loops.
//
if ( c3__wake != u2h(u2t(ovo)) ) {
u2_Host.beh_u.run_w = 0;
}
gon = _lo_soft(rec_u, sec_w, u2_reck_poke, u2k(ovo));
if ( u2_blip != u2h(gon) ) {
u2_noun why = u2k(u2h(gon));
u2_noun tan = u2k(u2t(gon));
u2z(gon);
_lo_lame(rec_u, ovo, why, tan);
}
else {
u2_noun vir = u2k(u2h(u2t(gon)));
u2_noun cor = u2k(u2t(u2t(gon)));
u2_noun nug;
u2z(gon);
nug = _lo_nick(rec_u, vir, cor);
if ( u2_blip != u2h(nug) ) {
u2_noun why = u2k(u2h(nug));
u2_noun tan = u2k(u2t(nug));
u2z(nug);
_lo_lame(rec_u, ovo, why, tan);
}
else {
vir = u2k(u2h(u2t(nug)));
cor = u2k(u2t(u2t(nug)));
u2z(nug);
_lo_sure(rec_u, ovo, vir, cor);
}
}
// uL(fprintf(uH, "punk oot %s\n", txt_c));
}
/* _lo_suck(): past failure.
*/
static void
_lo_suck(u2_reck* rec_u, u2_noun ovo, u2_noun gon)
{
uL(fprintf(uH, "sing: ovum failed!\n"));
{
c3_c* hed_c = u2_cr_string(u2h(u2t(ovo)));
uL(fprintf(uH, "fail %s\n", hed_c));
free(hed_c);
}
u2_lo_punt(2, u2_ckb_flop(u2k(u2t(gon))));
u2_loom_exit();
_lo_exit();
exit(1);
}
/* _lo_sing(): replay ovum from the past, time already set.
*/
static void
_lo_sing(u2_reck* rec_u, u2_noun ovo)
{
u2_noun gon = _lo_soft(rec_u, 0, u2_reck_poke, u2k(ovo));
if ( u2_blip != u2h(gon) ) {
_lo_suck(rec_u, ovo, gon);
}
else {
u2_noun vir = u2k(u2h(u2t(gon)));
u2_noun cor = u2k(u2t(u2t(gon)));
u2_noun nug;
u2z(gon);
nug = _lo_nick(rec_u, vir, cor);
if ( u2_blip != u2h(nug) ) {
_lo_suck(rec_u, ovo, nug);
}
else {
vir = u2h(u2t(nug));
cor = u2k(u2t(u2t(nug)));
while ( u2_nul != vir ) {
u2_noun fex = u2h(vir);
u2_noun fav = u2t(fex);
if ( (c3__init == u2h(fav)) || (c3__inuk == u2h(fav)) ) {
rec_u->own = u2nc(u2k(u2t(fav)), rec_u->own);
}
vir = u2t(vir);
}
u2z(nug);
u2z(rec_u->roc);
rec_u->roc = cor;
}
u2z(ovo);
}
}
/* _lo_work(): work in rec_u.
*/
static void
_lo_work(u2_reck* rec_u)
{
while ( rec_u->ova.egg_u ) {
u2_cart* egg_u = rec_u->ova.egg_u;
u2_noun egg = egg_u->egg;
rec_u->ova.egg_u = egg_u->nex_u;
if ( 0 == rec_u->ova.egg_u ) {
c3_assert(egg_u == rec_u->ova.geg_u);
rec_u->ova.geg_u = 0;
}
free(egg_u);
{
#if 0
// u2_noun old, new;
// c3_c* her_c = u2_cr_string(u2h(u2t(egg)));
// uint8_t her_t = (c3__hear == u2h(u2t(egg)));
if ( her_t ) {
u2_reck_time(u2A);
old = u2k(u2A->now);
// uL(fprintf(uH, "hear...\n"));
}
#endif
_lo_punk(rec_u, egg);
#if 0
if ( her_t ) {
c3_w tms_w;
u2_reck_time(u2A);
new = u2k(u2A->now);
tms_w = (c3_w)u2_time_gap_ms(old, new);
if ( tms_w >= 20 )
{
uL(fprintf(uH, "hear: %d ms\n", tms_w));
}
}
#endif
}
}
}
/* u2_lo_open(): begin callback processing.
*/
void
u2_lo_open(void)
{
// update time
//
u2_reck_time(u2A);
}
/* u2_lo_shut(): end callback processing.
*/
void
u2_lo_shut(u2_bean inn)
{
// u2_lo_grab("lo_shut a", u2_none);
// process actions
//
_lo_work(u2A);
// u2_lo_grab("lo_shut b", u2_none);
// update time
//
u2_reck_time(u2A);
// u2_lo_grab("lo_shut c", u2_none);
// for input operations, poll fs (XX not permanent)
//
if ( u2_yes == inn ) {
u2_unix_ef_look();
}
// u2_lo_grab("lo_shut d", u2_none);
// clean shutdown
//
if ( u2_no == u2_Host.liv ) {
// direct save and die
//
u2_cm_purge();
// u2_lo_grab("lo_exit", u2_none);
u2_loom_save(u2A->ent_w);
u2_loom_exit();
_lo_exit();
exit(0);
}
else {
// poll arvo to generate any event binding changes
//
_lo_poll();
}
}
/* _lo_home(): create ship directory.
*/
static void
_lo_home(u2_reck* rec_u)
{
c3_c ful_c[2048];
// Create subdirectories.
//
{
mkdir(u2_Host.cpu_c, 0700);
snprintf(ful_c, 2048, "%s/get", u2_Host.cpu_c);
if ( 0 != mkdir(ful_c, 0700) ) {
perror(ful_c);
u2_lo_bail(rec_u);
}
snprintf(ful_c, 2048, "%s/put", u2_Host.cpu_c);
if ( 0 != mkdir(ful_c, 0700) ) {
perror(ful_c);
u2_lo_bail(rec_u);
}
}
// Copy urbit.pill.
//
{
snprintf(ful_c, 2048, "cp %s/urbit.pill %s",
u2_Host.ops_u.hom_c, u2_Host.cpu_c);
if ( 0 != system(ful_c) ) {
uL(fprintf(uH, "could not %s\n", ful_c));
u2_lo_bail(rec_u);
}
}
}
/* _lo_cask(): ask for a passcode.
*/
static u2_noun
_lo_cask(u2_reck* rec_u, c3_c* dir_c, u2_bean nun)
{
c3_c paw_c[60];
u2_noun key;
uH;
while ( 1 ) {
printf("passcode for %s%s? ~", dir_c, (u2_yes == nun) ? " [none]" : "");
paw_c[0] = 0;
fpurge(stdin);
fgets(paw_c, 59, stdin);
if ( '\n' == paw_c[0] ) {
if ( u2_yes == nun ) {
key = 0; break;
}
else {
continue;
}
}
else {
c3_c* say_c = malloc(strlen(paw_c) + 2);
u2_noun say;
say_c[0] = '~';
say_c[1] = 0;
strncat(say_c, paw_c, strlen(paw_c) - 1);
say = u2_do("slay", u2_ci_string(say_c));
if ( (u2_nul == say) ||
(u2_blip != u2h(u2t(say))) ||
('p' != u2h(u2t(u2t(say)))) )
{
printf("invalid passcode\n");
continue;
}
key = u2k(u2t(u2t(u2t(say))));
u2z(say);
break;
}
}
uL(0);
return key;
}
/* _lo_text(): ask for a name string.
*/
static u2_noun
_lo_text(u2_reck* rec_u, c3_c* pom_c)
{
c3_c paw_c[60];
u2_noun say;
uH;
while ( 1 ) {
printf("%s: ", pom_c);
paw_c[0] = 0;
fpurge(stdin);
fgets(paw_c, 59, stdin);
if ( '\n' == paw_c[0] ) {
continue;
}
else {
c3_w len_w = strlen(paw_c);
if ( paw_c[len_w - 1] == '\n' ) {
paw_c[len_w-1] = 0;
}
say = u2_ci_string(paw_c);
break;
}
}
uL(0);
return say;
}
#if 0
/* _lo_bask(): ask a yes or no question.
*/
static u2_bean
_lo_bask(c3_c* pop_c, u2_bean may)
{
u2_bean yam;
uH;
while ( 1 ) {
c3_c ans_c[3];
printf("%s [y/n]? ", pop_c);
ans_c[0] = 0;
fpurge(stdin);
fgets(ans_c, 2, stdin);
if ( (ans_c[0] != 'y') && (ans_c[0] != 'n') ) {
continue;
} else {
yam = (ans_c[0] != 'n') ? u2_yes : u2_no;
break;
}
}
uL(0);
return yam;
}
#endif
/* _lo_rand(): fill a 256-bit (8-word) buffer.
*/
static void
_lo_rand(u2_reck* rec_u, c3_w* rad_w)
{
c3_i fid_i = open(DEVRANDOM, O_RDONLY);
if ( 32 != read(fid_i, (c3_y*) rad_w, 32) ) {
c3_assert(!"lo_rand");
}
close(fid_i);
}
/* _lo_fast(): offer to save passcode by mug in home directory.
*/
static void
_lo_fast(u2_reck* rec_u, u2_noun pas, c3_l key_l)
{
c3_c ful_c[2048];
c3_c* hom_c = getenv("HOME");
u2_noun gum = u2_dc("scot", 'p', key_l);
c3_c* gum_c = u2_cr_string(gum);
u2_noun yek = u2_dc("scot", 'p', pas);
c3_c* yek_c = u2_cr_string(yek);
printf("saving passcode in %s/.urbit/%s.txt\r\n", hom_c, gum_c);
printf("(for real security, write it down and delete the file...)\r\n");
{
c3_i fid_i;
snprintf(ful_c, 2048, "%s/.urbit", hom_c);
mkdir(ful_c, 0700);
snprintf(ful_c, 2048, "%s/.urbit/%s.txt", hom_c, gum_c);
if ( (fid_i = open(ful_c, O_CREAT | O_TRUNC | O_WRONLY, 0600)) < 0 ) {
uL(fprintf(uH, "fast: could not save %s\n", ful_c));
u2_lo_bail(rec_u);
}
write(fid_i, yek_c, strlen(yek_c));
close(fid_i);
}
free(gum_c);
u2z(gum);
free(yek_c);
u2z(yek);
}
/* _lo_staf(): try to load passcode by mug from home directory.
*/
static u2_noun
_lo_staf(u2_reck* rec_u, c3_l key_l)
{
c3_c ful_c[2048];
c3_c* hom_c = getenv("HOME");
u2_noun gum = u2_dc("scot", 'p', key_l);
c3_c* gum_c = u2_cr_string(gum);
u2_noun txt;
snprintf(ful_c, 2048, "%s/.urbit/%s.txt", hom_c, gum_c);
free(gum_c);
u2z(gum);
txt = u2_walk_safe(ful_c);
if ( 0 == txt ) {
uL(fprintf(uH, "staf: no passcode %s\n", ful_c));
return 0;
}
else {
// c3_c* txt_c = u2_cr_string(txt);
u2_noun say = u2_do("slay", txt);
u2_noun pas;
if ( (u2_nul == say) ||
(u2_blip != u2h(u2t(say))) ||
('p' != u2h(u2t(u2t(say)))) )
{
uL(fprintf(uH, "staf: %s is corrupt\n", ful_c));
u2z(say);
return 0;
}
uL(fprintf(uH, "loaded passcode from %s\n", ful_c));
pas = u2k(u2t(u2t(u2t(say))));
u2z(say);
return pas;
}
}
/* _lo_fatt(): stretch a 64-bit passcode to make a 128-bit key.
*/
static u2_noun
_lo_fatt(c3_l sal_l, u2_noun pas)
{
c3_w i_w;
u2_noun key = pas;
// XX use scrypt() - this is a stupid iterated hash
//
for ( i_w = 0; i_w < 32768; i_w++ ) {
key = u2_dc("shaf", sal_l, key);
}
return key;
}
/* _lo_zest(): create a new, empty record.
*/
static void
_lo_zest(u2_reck* rec_u)
{
struct stat buf_b;
c3_i fid_i;
c3_c ful_c[8193];
c3_l sal_l;
// Create the ship directory.
//
_lo_home(rec_u);
// Create the record file.
{
snprintf(ful_c, 2048, "%s/egz.hope", u2_Host.cpu_c);
if ( ((fid_i = open(ful_c, O_CREAT | O_WRONLY | O_EXCL, 0600)) < 0) ||
(fstat(fid_i, &buf_b) < 0) )
{
uL(fprintf(uH, "can't create record (%s)\n", ful_c));
u2_lo_bail(rec_u);
}
u2_Host.lug_u.fid_i = fid_i;
}
// Generate a 31-bit salt.
//
{
c3_w rad_w[8];
_lo_rand(rec_u, rad_w);
sal_l = (0x7fffffff & rad_w[0]);
}
// Create and save a passcode.
//
{
c3_w rad_w[8];
u2_noun pas;
_lo_rand(rec_u, rad_w);
pas = u2_ci_words(2, rad_w);
rec_u->key = _lo_fatt(sal_l, u2k(pas));
_lo_fast(rec_u, pas, u2_mug(rec_u->key));
}
// Write the header.
{
u2_uled led_u;
led_u.mag_l = u2_mug('f');
led_u.kno_w = rec_u->kno_w;
if ( 0 == rec_u->key ) {
led_u.key_l = 0;
} else {
led_u.key_l = u2_mug(rec_u->key);
c3_assert(!(led_u.key_l >> 31));
}
led_u.sal_l = sal_l;
led_u.sev_l = rec_u->sev_l;
led_u.tno_l = 1;
if ( sizeof(led_u) != write(fid_i, &led_u, sizeof(led_u)) ) {
uL(fprintf(uH, "can't write record (%s)\n", ful_c));
u2_lo_bail(rec_u);
}
u2_Host.lug_u.len_d = c3_wiseof(led_u);
}
// Save the boot events.
{
u2_noun nor = u2_ckb_flop(rec_u->roe);
rec_u->roe = nor;
while ( u2_nul != nor ) {
_lo_pack(rec_u, u2k(u2h(nor)));
rec_u->ent_w += 1;
nor = u2t(nor);
}
u2z(rec_u->roe);
rec_u->roe = 0;
}
#if 0
// Copy the egz into ham, the factory default.
{
snprintf(ful_c, 8193, "rm -f %s/~ham.hope; cp %s/~egz.hope %s/~ham.hope",
u2_Host.cpu_c, u2_Host.cpu_c, u2_Host.cpu_c);
if ( 0 != system(ful_c) ) {
uL(fprintf(uH, "zest: could not save ham\n"));
u2_lo_bail(rec_u);
}
}
#endif
}
/* _lo_make(): boot from scratch.
*/
static void
_lo_make(u2_reck* rec_u, u2_noun fav)
{
// Authenticate and initialize terminal.
//
u2_term_ef_bake(fav);
// Work through start sequence.
//
_lo_work(rec_u);
// Further server configuration.
//
{
u2_http_ef_bake();
}
// Work some more.
//
_lo_work(rec_u);
// Create the ship directory.
//
_lo_zest(rec_u);
}
/* _lo_rest(): restore from record, or exit.
*/
static void
_lo_rest(u2_reck* rec_u)
{
struct stat buf_b;
c3_i fid_i;
c3_c ful_c[2048];
c3_w old_w = rec_u->ent_w;
c3_w las_w = 0;
u2_noun roe = u2_nul;
u2_noun sev_l, tno_l, key_l, sal_l;
if ( 0 != rec_u->ent_w ) {
u2_noun ent = u2_dc("scot", c3__ud, rec_u->ent_w);
c3_c* ent_c = u2_cr_string(ent);
uL(fprintf(uH, "rest: checkpoint to event %s\n", ent_c));
free(ent_c);
}
// Open the fscking file. Does it even exist?
{
snprintf(ful_c, 2048, "%s/egz.hope", u2_Host.cpu_c);
if ( ((fid_i = open(ful_c, O_RDWR)) < 0) ||
(fstat(fid_i, &buf_b) < 0) )
{
uL(fprintf(uH, "rest: can't open record (%s)\n", ful_c));
u2_lo_bail(rec_u);
return;
}
u2_Host.lug_u.fid_i = fid_i;
u2_Host.lug_u.len_d = ((buf_b.st_size + 3ULL) >> 2ULL);
}
// Check the fscking header. It's probably corrupt.
{
u2_uled led_u;
if ( sizeof(led_u) != read(fid_i, &led_u, sizeof(led_u)) ) {
uL(fprintf(uH, "record (%s) is corrupt (a)\n", ful_c));
u2_lo_bail(rec_u);
}
if ( u2_mug('f') != led_u.mag_l ) {
uL(fprintf(uH, "record (%s) is obsolete (or corrupt)\n", ful_c));
u2_lo_bail(rec_u);
}
if ( led_u.kno_w != rec_u->kno_w ) {
// XX perhaps we should actually do something here
//
uL(fprintf(uH, "rest: (not) translating events (old %d, now %d)\n",
led_u.kno_w,
rec_u->kno_w));
}
sev_l = led_u.sev_l;
sal_l = led_u.sal_l;
key_l = led_u.key_l;
tno_l = led_u.tno_l;
{
u2_noun old = u2_dc("scot", c3__uv, sev_l);
u2_noun nuu = u2_dc("scot", c3__uv, rec_u->sev_l);
c3_c* old_c = u2_cr_string(old);
c3_c* nuu_c = u2_cr_string(nuu);
uL(fprintf(uH, "rest: old %s, new %s\n", old_c, nuu_c));
free(old_c); free(nuu_c);
u2z(old); u2z(nuu);
}
c3_assert(sev_l != rec_u->sev_l); // 1 in 2 billion, just retry
}
// Oh, and let's hope you didn't forget the fscking passcode.
{
if ( 0 != key_l ) {
u2_noun pas = _lo_staf(rec_u, key_l);
u2_noun key;
while ( 1 ) {
pas = pas ? pas : _lo_cask(rec_u, u2_Host.cpu_c, u2_no);
key = _lo_fatt(sal_l, pas);
if ( u2_mug(key) != key_l ) {
uL(fprintf(uH, "incorrect passcode\n"));
u2z(key);
pas = 0;
}
else {
u2z(rec_u->key);
rec_u->key = key;
break;
}
}
}
}
// Read in the fscking events. These are probably corrupt as well.
{
c3_w ent_w;
c3_d end_d;
end_d = u2_Host.lug_u.len_d;
ent_w = 0;
if ( -1 == lseek64(fid_i, 4ULL * end_d, SEEK_SET) ) {
fprintf(stderr, "end_d %llx\n", end_d);
perror("lseek");
uL(fprintf(uH, "record (%s) is corrupt (c)\n", ful_c));
u2_lo_bail(rec_u);
}
while ( end_d != c3_wiseof(u2_uled) ) {
c3_d tar_d = (end_d - (c3_d)c3_wiseof(u2_ular));
u2_ular lar_u;
c3_w* img_w;
u2_noun ron;
// uL(fprintf(uH, "rest: reading event at %llx\n", end_d));
if ( -1 == lseek64(fid_i, 4ULL * tar_d, SEEK_SET) ) {
uL(fprintf(uH, "record (%s) is corrupt (d)\n", ful_c));
u2_lo_bail(rec_u);
}
if ( sizeof(u2_ular) != read(fid_i, &lar_u, sizeof(u2_ular)) ) {
uL(fprintf(uH, "record (%s) is corrupt (e)\n", ful_c));
u2_lo_bail(rec_u);
}
if ( lar_u.syn_w != u2_mug((c3_w)tar_d) ) {
uL(fprintf(uH, "record (%s) is corrupt (f)\n", ful_c));
u2_lo_bail(rec_u);
}
#if 0
uL(fprintf(uH, "log: read: at %d, %d: lar ent %d, len %d, mug %x\n",
(tar_w - lar_u.len_w),
tar_w,
lar_u.ent_w,
lar_u.len_w,
lar_u.mug_w));
#endif
img_w = malloc(4 * lar_u.len_w);
if ( end_d == u2_Host.lug_u.len_d ) {
ent_w = las_w = lar_u.ent_w;
}
else {
if ( lar_u.ent_w != (ent_w - 1) ) {
uL(fprintf(uH, "record (%s) is corrupt (g)\n", ful_c));
uL(fprintf(uH, "lar_u.ent_w %x, ent_w %x\n", lar_u.ent_w, ent_w));
u2_lo_bail(rec_u);
}
ent_w -= 1;
}
end_d = (tar_d - (c3_d)lar_u.len_w);
if ( ent_w < old_w ) {
free(img_w);
break;
}
if ( -1 == lseek64(fid_i, 4ULL * end_d, SEEK_SET) ) {
uL(fprintf(uH, "record (%s) is corrupt (h)\n", ful_c));
u2_lo_bail(rec_u);
}
if ( (4 * lar_u.len_w) != read(fid_i, img_w, (4 * lar_u.len_w)) ) {
uL(fprintf(uH, "record (%s) is corrupt (i)\n", ful_c));
u2_lo_bail(rec_u);
}
ron = u2_ci_words(lar_u.len_w, img_w);
free(img_w);
if ( u2_mug(ron) != lar_u.mug_w ) {
uL(fprintf(uH, "record (%s) is corrupt (j)\n", ful_c));
u2_lo_bail(rec_u);
}
if ( rec_u->key ) {
u2_noun dep;
dep = u2_dc("de:crya", u2k(rec_u->key), ron);
if ( u2_no == u2du(dep) ) {
uL(fprintf(uH, "record (%s) is corrupt (k)\n", ful_c));
u2_lo_bail(rec_u);
}
else {
ron = u2k(u2t(dep));
u2z(dep);
}
}
roe = u2nc(u2_cke_cue(ron), roe);
}
rec_u->ent_w = c3_max(las_w + 1, old_w);
}
if ( u2_nul == roe ) {
// Nothing in the log that was not also in the checkpoint.
//
c3_assert(rec_u->ent_w == old_w);
c3_assert((las_w + 1) == old_w);
}
else {
u2_noun rou = roe;
c3_w xno_w;
// Execute the fscking things. This is pretty much certain to crash.
//
uL(fprintf(uH, "rest: replaying through event %d\n", las_w));
fprintf(uH, "---------------- playback starting----------------\n");
xno_w = 0;
while ( u2_nul != roe ) {
u2_noun i_roe = u2h(roe);
u2_noun t_roe = u2t(roe);
u2_noun now = u2h(i_roe);
u2_noun ovo = u2t(i_roe);
u2_reck_wind(rec_u, u2k(now));
if ( (u2_yes == u2_Host.ops_u.vno) &&
(c3__veer == u2h(u2t(ovo))) ) {
uL(fprintf(uH, "replay: skipped veer\n"));
}
else {
_lo_sing(rec_u, u2k(ovo));
}
fputc('.', stderr);
// uL(fprintf(uH, "playback: sing: %d\n", xno_w));
roe = t_roe;
xno_w++;
if ( 0 == (xno_w % 1000) ) {
uL(fprintf(uH, "{%d}\n", xno_w));
}
}
u2z(rou);
}
uL(fprintf(stderr, "\n---------------- playback complete----------------\n"));
#if 0
// If you see this error, your record is totally fscking broken!
// Which probably serves you right. Please consult a consultant.
{
if ( u2_nul == rec_u->own ) {
uL(fprintf(uH, "record did not install a master!\n"));
u2_lo_bail(rec_u);
}
rec_u->our = u2k(u2h(rec_u->own));
rec_u->pod = u2_dc("scot", 'p', u2k(rec_u->our)));
}
// Now, who the fsck are you? No, really.
{
u2_noun who;
c3_c* fil_c;
c3_c* who_c;
if ( (fil_c = strrchr(u2_Host.cpu_c, '/')) ) {
fil_c++;
} else fil_c = u2_Host.cpu_c;
who = u2_dc("scot", 'p', u2k(rec_u->our)));
who_c = u2_cr_string(who);
u2z(who);
if ( strncmp(fil_c, who_c + 1, strlen(fil_c)) ) {
uL(fprintf(uH, "record master (%s) does not match filename!\n", who_c));
u2_lo_bail(rec_u);
}
free(who_c);
}
#endif
// Rewrite the header. Will probably corrupt the record.
{
u2_uled led_u;
led_u.mag_l = u2_mug('f');
led_u.sal_l = sal_l;
led_u.sev_l = rec_u->sev_l;
led_u.key_l = rec_u->key ? u2_mug(rec_u->key) : 0;
led_u.kno_w = rec_u->kno_w; // may need actual translation!
led_u.tno_l = 1;
if ( (-1 == lseek64(fid_i, 0, SEEK_SET)) ||
(sizeof(led_u) != write(fid_i, &led_u, sizeof(led_u))) )
{
uL(fprintf(uH, "record (%s) failed to rewrite\n", ful_c));
u2_lo_bail(rec_u);
}
}
// Hey, fscker! It worked.
{
u2_term_ef_boil(tno_l);
}
}
/* _lo_zen(): get OS entropy.
*/
static u2_noun
_lo_zen(u2_reck* rec_u)
{
c3_w rad_w[8];
_lo_rand(rec_u, rad_w);
return u2_ci_words(8, rad_w);
}
/* _lo_boot(): restore or create.
*/
static void
_lo_boot(void)
{
if ( u2_yes == u2_Host.ops_u.nuu ) {
u2_noun pig;
if ( 0 == u2_Host.ops_u.imp_c ) {
c3_c get_c[2049];
snprintf(get_c, 2048, "%s/get", u2_Host.cpu_c);
if ( 0 == access(get_c, 0) ) {
uL(fprintf(uH, "pier: already built\n"));
exit(1);
}
u2_noun ten = _lo_zen(u2A);
uL(fprintf(uH, "generating 2048-bit RSA pair...\n"));
pig = u2nq(c3__make, u2_nul, 11, ten);
}
else {
u2_noun imp = u2_ci_string(u2_Host.ops_u.imp_c);
u2_noun whu = u2_dc("slaw", 'p', u2k(imp));
if ( (u2_nul == whu) ) {
fprintf(stderr, "czar: incorrect format\r\n");
exit(1);
}
else {
u2_noun gen = _lo_text(u2A, "generator");
u2_noun gun = u2_dc("slaw", c3__uw, gen);
if ( u2_nul == gun ) {
fprintf(stderr, "czar: incorrect format\r\n");
exit(1);
}
pig = u2nt(c3__sith, u2k(u2t(whu)), u2k(u2t(gun)));
u2z(whu); u2z(gun);
}
u2z(imp);
}
_lo_make(u2A, pig);
}
else {
_lo_rest(u2A);
}
}
#if 0
// _lo_bench_noop(): benchmark no-op events.
//
static void
_lo_bench_noop(c3_w num_w)
{
c3_w i_w;
for ( i_w = 0; i_w < num_w; i_w++ ) {
u2_reck_plan(u2A, u2nq(c3__gold, c3__term, 1, u2_nul),
u2nc(c3__noop, u2_nul));
}
_lo_work(u2A);
}
// _lo_bench_scot_p(): benchmark prettyprint.
//
static void
_lo_bench_scot_p(c3_w num_w)
{
c3_w i_w;
for ( i_w = 0; i_w < num_w; i_w++ ) {
u2_noun soc = u2_dc("scot", 'p', u2k(u2A->now));
u2z(soc);
}
}
// _lo_bench_slay_p(): benchmark prettyprint.
//
static void
_lo_bench_slay_p(c3_w num_w)
{
c3_w i_w;
for ( i_w = 0; i_w < num_w; i_w++ ) {
u2_noun soc = u2_dc("scot", 'p', u2k(u2A->now));
u2_noun dub = u2_do("slay", soc);
u2z(dub);
}
}
// _lo_bench_scot_da(): benchmark prettyprint.
//
static void
_lo_bench_scot_da(c3_w num_w)
{
c3_w i_w;
for ( i_w = 0; i_w < num_w; i_w++ ) {
u2_noun soc = u2_dc("scot", c3__da, u2k(u2A->now));
u2z(soc);
}
}
// _lo_bench_dec(): benchmark decrement.
//
static void
_lo_bench_dec(c3_w num_w)
{
c3_w i_w;
for ( i_w = 0; i_w < num_w; i_w++ ) {
u2_noun soc = u2_do("dec", u2k(u2A->now));
u2z(soc);
}
}
// _lo_bench_scot_ud(): benchmark prettyprint.
//
static void
_lo_bench_scot_ud(c3_w num_w)
{
c3_w i_w;
for ( i_w = 0; i_w < num_w; i_w++ ) {
u2_noun soc = u2_dc("scot", c3__ud, u2k(u2A->now));
u2z(soc);
}
}
// _lo_bench(): lo-tech profiling.
//
static void
_lo_bench(const c3_c* lab_c, void (*fun)(c3_w), c3_w num_w)
{
u2_noun old, new;
uL(fprintf(uH, "bench: %s: start...\n", lab_c));
u2_reck_time(u2A);
old = u2k(u2A->now);
fun(num_w);
u2_reck_time(u2A);
new = u2k(u2A->now);
{
c3_w tms_w = (c3_w)u2_time_gap_ms(old, new);
if ( tms_w > (10 * num_w) ) {
uL(fprintf(uH, "bench: %s*%d: %d ms, %d ms each.\n",
lab_c, num_w, tms_w, (tms_w / num_w)));
}
else {
uL(fprintf(uH, "bench: %s*%d: %d ms, %d us each.\n",
lab_c, num_w, tms_w, ((tms_w * 1000) / num_w)));
}
}
}
#endif
/* u2_lo_show(): generic noun print.
*/
void
u2_lo_show(c3_c* cap_c, u2_noun nun)
{
u2_noun pav = u2_dc("pave", c3__noun, nun);
c3_c* txt_c = (c3_c*)u2_cr_tape(pav);
fprintf(stderr, "%s: %s\r\n", cap_c, txt_c);
u2z(pav);
free(txt_c);
}
static void
_lo_slow()
{
#if 0
_lo_bench("scot %p", _lo_bench_scot_p, 256);
_lo_bench("scot %da", _lo_bench_scot_da, 256);
_lo_bench("scot %ud", _lo_bench_scot_ud, 256);
_lo_bench("slay %p", _lo_bench_slay_p, 256);
_lo_bench("noop", _lo_bench_noop, 256);
#endif
}
/* u2_lo_boot(): restore or create pier.
*/
void
u2_lo_boot()
{
uv_loop_t* lup_u = uv_default_loop();
u2_Host.lup_u = lup_u;
signal(SIGPIPE, SIG_IGN); // pipe, schmipe
// signal(SIGIO, SIG_IGN); // linux is wont to produce for some reason
_lo_init();
_lo_boot();
}
/* u2_lo_loop(): begin main event loop.
*/
void
u2_lo_loop(u2_reck* rec_u)
{
_lo_talk();
{
u2_unix_ef_look();
u2_reck_plan(rec_u, u2nt(c3__gold, c3__ames, u2_nul),
u2nc(c3__kick, u2k(rec_u->now)));
}
_lo_poll();
#if 1
u2_loom_save(rec_u->ent_w);
u2_Host.sav_u.ent_w = rec_u->ent_w;
#endif
if ( u2_yes == u2_Host.ops_u.nuu ) {
u2_term_ef_boil(1);
}
#if 1
_lo_slow();
#endif
uv_run(u2L, UV_RUN_DEFAULT);
}
/* _lo_mark_reck(): mark a reck.
*/
static c3_w
_lo_mark_reck(u2_reck* rec_u)
{
c3_w siz_w = 0;
c3_w egg_w;
siz_w += u2_cm_mark_noun(rec_u->ken);
siz_w += u2_cm_mark_noun(rec_u->roc);
siz_w += u2_cm_mark_noun(rec_u->yot);
siz_w += u2_cm_mark_noun(rec_u->now);
siz_w += u2_cm_mark_noun(rec_u->wen);
siz_w += u2_cm_mark_noun(rec_u->sen);
siz_w += u2_cm_mark_noun(rec_u->own);
siz_w += u2_cm_mark_noun(rec_u->roe);
siz_w += u2_cm_mark_noun(rec_u->key);
{
u2_cart* egg_u;
egg_w = 0;
for ( egg_u = rec_u->ova.egg_u; egg_u; egg_u = egg_u->nex_u ) {
egg_w += u2_cm_mark_noun(egg_u->egg);
}
siz_w += egg_w;
}
#if 0
fprintf(stderr, "ken %d, roc %d, yot %d, roe %d, egg %d\r\n",
ken_w, roc_w, yot_w, roe_w, egg_w);
#endif
return siz_w;
}
/* _lo_mark(): mark the whole vere system.
*/
static c3_w
_lo_mark()
{
c3_w siz_w;
siz_w = u2_cm_mark_internal();
siz_w += _lo_mark_reck(u2_Host.arv_u);
return siz_w;
}
/* _lo_word(): print a word to stderr.
*/
static void
_lo_word(c3_w wod_w)
{
u2_bean top = u2_yes;
if ( wod_w / (1000 * 1000 * 1000) ) {
uL(fprintf(uH, "%u.", wod_w / (1000 * 1000 * 1000)));
wod_w %= (1000 * 1000 * 1000);
top = u2_no;
}
if ( wod_w / (1000 * 1000) ) {
uL(fprintf(uH, ((top == u2_yes) ? "%u." : "%03u."),
wod_w / (1000 * 1000)));
wod_w %= (1000 * 1000);
top = u2_no;
}
if ( wod_w / 1000 ) {
uL(fprintf(uH, ((top == u2_yes) ? "%u." : "%03u."), wod_w / 1000));
wod_w %= 1000;
top = u2_no;
}
uL(fprintf(uH, ((top == u2_yes) ? "%u" : "%03u"), wod_w));
}
/* u2_lo_grab(): garbage-collect the world, plus roots.
*/
void
u2_lo_grab(c3_c* cap_c, u2_noun som, ...)
{
c3_w siz_w, lec_w;
siz_w = _lo_mark();
{
va_list vap;
u2_noun tur;
va_start(vap, som);
if ( som != u2_none ) {
siz_w += u2_cm_mark_noun(som);
while ( u2_none != (tur = va_arg(vap, u2_noun)) ) {
siz_w += u2_cm_mark_noun(tur);
}
}
va_end(vap);
}
lec_w = u2_cm_sweep(siz_w);
// if ( lec_w || (u2_yes == u2_Flag_Verbose) )
if ( lec_w || !strcmp("init", cap_c) ) {
uL(fprintf(uH, "%s: gc: ", cap_c));
if ( lec_w ) {
_lo_word(4 * lec_w);
uL(fprintf(uH, " bytes shed; "));
}
_lo_word(4 * siz_w);
uL(fprintf(uH, " bytes live\n"));
#if 0
if ( lec_w ) {
uL(fprintf(uH, "zero garbage tolerance!\n"));
_lo_exit();
c3_assert(0);
exit(1);
}
#endif
}
u2_wire_lan(u2_Wire) = u2_yes;
}
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