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Fork a child to handle checkpointing.

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Kill the noise, and handle exit status from the child. If anything
untoward happens to the child, we need to know about it.
This commit is contained in:
~hatteb-mitlyd 2014-03-21 18:08:58 -07:00
parent c837404578
commit 23aced9775
2 changed files with 9 additions and 9 deletions
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2
Makefile
View File

@ -54,7 +54,7 @@ LIBS=-lssl -lcrypto -lgmp -lncurses -lsigsegv $(OSLIBS)
INCLUDE=include
GENERATED=generated
MDEFINES=-DU2_OS_$(OS) -DU2_OS_ENDIAN_$(ENDIAN) -D U2_LIB=\"$(LIB)\"
MDEFINES=-DU2_OS_$(OS) -DU2_OS_ENDIAN_$(ENDIAN) -D U2_LIB=\"$(LIB)\" -DFORKPT
CFLAGS=-O3 \
-I/usr/local/include \

16
v/save.c
View File

@ -23,12 +23,8 @@
static void
_save_sign_cb(uv_signal_t* sil_u, c3_i num_i)
{
uL(fprintf(uH, "save: signal %d\n", num_i));
{
switch ( num_i ) {
case SIGCHLD: u2_save_ef_chld(); break;
}
}
c3_assert(SIGCHLD == num_i);
u2_save_ef_chld();
}
/* _save_time_cb(): timer callback.
@ -55,7 +51,7 @@ _save_time_cb(uv_timer_t* tim_u, c3_i sas_i)
exit(0);
}
else {
uL(fprintf(uH, "checkpoint: process %d\n", pid_w));
// uL(fprintf(uH, "checkpoint: process %d\n", pid_w));
sav_u->ent_w = u2A->ent_w;
sav_u->pid_w = pid_w;
@ -78,13 +74,14 @@ u2_save_ef_chld(void)
/* modified for cases with no pid_w
*/
uL(fprintf(uH, "checkpoint: complete %d\n", sav_u->pid_w));
// uL(fprintf(uH, "checkpoint: complete %d\n", sav_u->pid_w));
pid_w = wait(&loc_i);
if (0 != sav_u->pid_w) {
c3_assert(pid_w == sav_u->pid_w);
}
else {
c3_assert(pid_w > 0);
c3_assert(WIFEXITED(pid_w) && 0 == WEXITSTATUS(pid_w));
}
sav_u->pid_w = 0;
}
@ -102,7 +99,10 @@ u2_save_io_init(void)
uv_timer_init(u2L, &sav_u->tim_u);
uv_timer_start(&sav_u->tim_u, _save_time_cb, 15000, 15000);
#ifdef FORKPT
uv_signal_init(u2L, &sav_u->sil_u);
uv_signal_start(&sav_u->sil_u, _save_sign_cb, SIGCHLD);
#endif
}
/* u2_save_io_exit(): terminate save I/O.