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some more work on process switching and exception handling

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This commit is contained in:
hyunghwan.chung 2016-05-17 15:12:27 +00:00
parent 42006f9c32
commit 717ffcbdd9
11 changed files with 208 additions and 50 deletions
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2
stix/configure vendored
View File

@ -18194,7 +18194,7 @@ done
for ac_func in gettimeofday settimeofday clock_gettime clock_settime
for ac_func in gettimeofday settimeofday clock_gettime clock_settime getitimer setitimer
do :
as_ac_var=`$as_echo "ac_cv_func_$ac_func" | $as_tr_sh`
ac_fn_c_check_func "$LINENO" "$ac_func" "$as_ac_var"

2
stix/configure.ac
View File

@ -152,7 +152,7 @@ dnl [],
dnl [#include <stddef.h>])
dnl check functions
AC_CHECK_FUNCS([gettimeofday settimeofday clock_gettime clock_settime])
AC_CHECK_FUNCS([gettimeofday settimeofday clock_gettime clock_settime getitimer setitimer])
AC_CHECK_FUNCS([backtrace backtrace_symbols])
AC_CHECK_FUNCS([makecontext swapcontext getcontext setcontext])
AC_CHECK_FUNCS([snprintf _vsnprintf _vsnwprintf])

8
stix/kernel/Apex.st
View File

@ -267,14 +267,6 @@
self class primitiveFailed.
}
#method(#class) doesNotUnderstand: messageSymbol
{
## TODO: implement this
## UnrecognizedMessage signal.
self class dump.
'does not understand' dump.
}
#method doesNotUnderstand: messageSymbol
{
self class doesNotUnderstand: messageSymbol

55
stix/kernel/Context.st
View File

@ -1,3 +1,10 @@
#class Exception(Apex)
{
#dcl signalContext handlerContext handlerBlock messageText.
## To be extended below.
}
#class(#pointer) Context(Apex)
{
#dcl sender ip sp ntmprs.
@ -309,20 +316,18 @@ thisContext isExceptionHandlerContext dump.
#method ensure: aBlock
{
"##
| complete returnValue |
<ensure>
returnValue := self valueNoContextSwitch.
complete ifNil: [
complete := true.
aBlock value.
].
^returnValue. ##"
## TODO: ensure that the ensured block is executed after exception handler...
| value |
value := self on: Exception do: [:ex | aBlock value. ex pass].
## value := self valueAndResumeOnUnwind.
aBlock value.
^value
}
#method ifCurtailed: aBlock
{
^self on: Exception do: [:ex | aBlock value. ex pass ]
}
"------ TODO: -------------------------------------"
@ -330,9 +335,9 @@ thisContext isExceptionHandlerContext dump.
## TODO: is it better to inherit from Object???
## or treat Exception specially like UndefinedObject or Class???
#class Exception(Apex)
#extend Exception
{
#dcl signalContext handlerContext handlerBlock messageText.
#method(#class) signal
{
@ -403,9 +408,8 @@ thisContext isExceptionHandlerContext dump.
]
}
## ####################################################################
## ####################################################################
#method handleException
## #################################################################### ## ####################################################################
#method handleException
{
self.handlerContext notNil
ifTrue: [
@ -418,12 +422,12 @@ thisContext isExceptionHandlerContext dump.
].
}
#method handlerContext
{
(self.handlerContext notNil) ifTrue: [ ^self.handlerContext ].
self.handlerContext := self findHandlerContextStartingFrom: self.signalContext.
^self.handlerContext.
}
## #method handlerContext
## {
## (self.handlerContext notNil) ifTrue: [ ^self.handlerContext ].
## self findHandlerContextStartingFrom: self.signalContext.
## ^self.handlerContext.
## }
#method findHandlerContextStartingFrom: aContext
{
@ -444,6 +448,10 @@ thisContext isExceptionHandlerContext dump.
].
ctx := ctx sender
].
## no handler is found
self.handlerBlock := nil.
self.handlerContext := nil.
^nil
}
}
@ -470,6 +478,7 @@ ctx := thisContext.
## TODO: include blockcontext???
ctx := ctx sender.
].
'------ END OF BACKTRACE -----------' dump.
PrimitiveFailureException signal: 'PRIMITIVE FAILED'.
}
@ -477,4 +486,10 @@ ctx := thisContext.
{
Exception signal: 'Cannot instantiate'.
}
#method(#class) doesNotUnderstand: messageSymbol
{
## TODO: implement this properly
NoSuchMessageException signal: (messageSymbol, ' not understood by ', (self name)).
}
}

8
stix/kernel/Process.st
View File

@ -102,6 +102,14 @@
self primitiveFailed
}
#method critical: aBlock
{
'CRITICAL....11' dump.
self wait.
'CRITICAL....22' dump.
^aBlock ensure: [ self signal ]
}
## ==================================================================
#method heapIndex

45
stix/kernel/test-010.st
View File

@ -45,7 +45,52 @@
'END OF MAIN' dump.
}
#method(#class) main
{
## test critical region
|t1 t2 s1 s2 s3|
'START OF MAIN' dump.
s1 := Semaphore new.
s2 := Semaphore new.
t1 := [
1000 timesRepeat: ['BLOCK #1' dump].
##s2 critical: [
## 10 timesRepeat: ['BLOCK #1' dump ]
##]
] newProcess.
t2 := [
1000 timesRepeat: ['BLOCK #2' dump].
##s2 critical: [
## 10 timesRepeat: ['BLOCK #2' dump. ]
##].
s1 signal.
] newProcess.
t1 resume.
t2 resume.
s1 wait.
'END OF MAIN' dump.
"
| v1 |
'START OF MAIN' dump.
##[1 xxx] ifCurtailed: ['XXXXXXXX CURTAILED XXXXXXXXX' dump].
##['ENSURE TEST' dump] ensure: ['XXXXXXXXX ENSURE XXXXXXXXXXXXXx' dump].
v1 := [ ['kkk' dump.] ensure: ['XXXXXXXXX ENSURE XXXXXXXXXXXXXx' dump. 30] ] on: Exception do: [:ex | 'EXCEPTION OUTSIDE ENSURE...' dump. ].
v1 dump.
'END OF MAIN' dump."
}
#method(#class) main22222
{
|t1 t2 s1 s2 s3|

48
stix/lib/exec.c
View File

@ -41,6 +41,7 @@
# if defined(HAVE_SYS_TIME_H)
# include <sys/time.h>
# endif
#endif
#define PROC_STATE_RUNNING 3
@ -2865,19 +2866,38 @@ printf ("\n");
method = find_method (stix, receiver, &mthname, to_super);
if (!method)
{
/* TODO: implement doesNotUnderstand: XXXXX instead of returning -1. */
stix_oop_t c;
static stix_uch_t fbm[] = { 'd', 'o', 'e', 's', 'N', 'o', 't', 'U', 'n', 'd', 'e', 'r', 's', 't', 'a', 'n', 'd', ':' };
mthname.ptr = fbm;
mthname.len = 18;
c = STIX_CLASSOF(stix,receiver);
printf ("ERROR [NOT IMPLEMENTED YET] - receiver [");
print_object (stix, receiver);
printf ("] class ");
print_object (stix, c);
printf (" doesNotUnderstand: [");
print_oocs (&mthname);
printf ("]\n");
method = find_method (stix, receiver, &mthname, 0);
if (!method)
{
/* TODO: improve this hard error handling */
stix_oop_t c;
return -1;
c = STIX_CLASSOF(stix,receiver);
printf ("HARD FAILURE ERROR [IMAGE PROBLEM] - receiver [");
print_object (stix, receiver);
printf ("] class ");
print_object (stix, c);
printf (" doesNotUnderstand: [");
print_oocs (&mthname);
printf ("]\n");
stix->errnum = STIX_EMSGSND;
return -1;
}
else
{
/* manipulate the stack as if 'receier doesNotUnderstand: select'
* has been called. */
/* TODO: if i manipulate the stack this way here, the stack track for the last call is kind of lost.
* how can i preserve it gracefully? */
ACTIVE_STACK_POPS (stix, nargs);
nargs = 1;
ACTIVE_STACK_PUSH (stix, selector);
}
}
STIX_ASSERT (STIX_OOP_TO_SMOOI(method->tmpr_nargs) == nargs);
@ -3129,7 +3149,13 @@ printf ("REALLY NO MORE RUNNABLE PROCESS...\n");
}*/
/* TODO: implement different process switching scheme - time-slice or clock based??? */
#if defined(STIX_EXTERNAL_PROCESS_SWITCH)
if (!stix->proc_switched && stix->switch_proc) { switch_to_next_runnable_process (stix); }
stix->switch_proc = 0;
#else
if (!stix->proc_switched) { switch_to_next_runnable_process (stix); }
#endif
stix->proc_switched = 0;
FETCH_BYTE_CODE_TO (stix, bcode);

73
stix/lib/main.c
View File

@ -52,6 +52,16 @@
# include <unistd.h>
# include <ltdl.h>
# define USE_LTDL
# if defined(HAVE_TIME_H)
# include <time.h>
# endif
# if defined(HAVE_SYS_TIME_H)
# include <sys/time.h>
# endif
# if defined(HAVE_SIGNAL_H)
# include <signal.h>
# endif
#endif
#if !defined(STIX_DEFAULT_MODPREFIX)
@ -375,6 +385,52 @@ stix_ooch_t str_my_object[] = { 'M', 'y', 'O', 'b','j','e','c','t' };
stix_ooch_t str_main[] = { 'm', 'a', 'i', 'n' };
stix_t* g_stix = STIX_NULL;
static void arrange_process_switching (int sig)
{
if (g_stix) stix_switchprocess (g_stix);
}
static void setup_tick (void)
{
#if defined(HAVE_SETITIMER) && defined(SIGVTALRM) && defined(ITIMER_VIRTUAL)
struct itimerval itv;
struct sigaction act;
sigemptyset (&act.sa_mask);
act.sa_handler = arrange_process_switching;
act.sa_flags = 0;
sigaction (SIGVTALRM, &act, STIX_NULL);
itv.it_interval.tv_sec = 0;
itv.it_interval.tv_usec = 100; /* 100 microseconds */
itv.it_value.tv_sec = 0;
itv.it_value.tv_usec = 100;
setitimer (ITIMER_VIRTUAL, &itv, STIX_NULL);
#endif
}
static void cancel_tick (void)
{
#if defined(HAVE_SETITIMER) && defined(SIGVTALRM) && defined(ITIMER_VIRTUAL)
struct itimerval itv;
struct sigaction act;
itv.it_interval.tv_sec = 0;
itv.it_interval.tv_usec = 0;
itv.it_value.tv_sec = 0;
itv.it_value.tv_usec = 0;
setitimer (ITIMER_VIRTUAL, &itv, STIX_NULL);
sigemptyset (&act.sa_mask);
act.sa_handler = SIG_DFL;
act.sa_flags = 0;
sigaction (SIGVTALRM, &act, STIX_NULL);
#endif
}
int main (int argc, char* argv[])
{
stix_t* stix;
@ -382,7 +438,7 @@ int main (int argc, char* argv[])
stix_oocs_t objname;
stix_oocs_t mthname;
stix_vmprim_t vmprim;
int i;
int i, xret;
printf ("Stix 1.0.0 - max named %lu max indexed %lu max class %lu max classinst %lu oowmax %lu, ooimax %ld ooimin %ld smooimax %ld smooimax %ld\n",
(unsigned long int)STIX_MAX_NAMED_INSTVARS,
@ -593,6 +649,11 @@ printf ("%p\n", a);
}
}
xret = 0;
g_stix = stix;
setup_tick ();
/* objname.ptr = str_system;
objname.len = 6;*/
objname.ptr = str_my_object;
@ -602,13 +663,11 @@ printf ("%p\n", a);
if (stix_invoke (stix, &objname, &mthname) <= -1)
{
printf ("ERROR: cannot execute code - %d\n", stix_geterrnum(stix));
stix_close (stix);
#if defined(USE_LTDL)
lt_dlexit ();
#endif
return -1;
xret = -1;
}
cancel_tick ();
g_stix = STIX_NULL;
/* dump_dictionary (stix, stix->sysdic, "System dictionary");*/
stix_close (stix);
@ -620,5 +679,5 @@ printf ("%p\n", a);
#if defined(_WIN32) && defined(_DEBUG)
getchar();
#endif
return 0;
return xret;
}

6
stix/lib/stix-cfg.h.in
View File

@ -115,6 +115,9 @@
/* Define to 1 if you have the `getcontext' function. */
#undef HAVE_GETCONTEXT
/* Define to 1 if you have the `getitimer' function. */
#undef HAVE_GETITIMER
/* Define to 1 if you have the `gettimeofday' function. */
#undef HAVE_GETTIMEOFDAY
@ -169,6 +172,9 @@
/* Define to 1 if you have the `setcontext' function. */
#undef HAVE_SETCONTEXT
/* Define to 1 if you have the `setitimer' function. */
#undef HAVE_SETITIMER
/* Define to 1 if you have the `settimeofday' function. */
#undef HAVE_SETTIMEOFDAY

5
stix/lib/stix-prv.h
View File

@ -54,7 +54,7 @@
/* this is for gc debugging */
/*#define STIX_DEBUG_PROCESSOR*/
/*#define STIX_DEBUG_GC_001*/
#define STIX_DEBUG_GC_001
/*#define STIX_DEBUG_GC_002*/
#define STIX_DEBUG_COMP_001
/*#define STIX_DEBUG_COMP_002*/
@ -62,6 +62,9 @@
/*#define STIX_DEBUG_EXEC_002*/
#define STIX_PROFILE_EXEC
/* allow the caller to drive process switching by calling
* stix_switchprocess(). */
#define STIX_EXTERNAL_PROCESS_SWITCH
/* limit the maximum object size such that:
* 1. an index to an object field can be represented in a small integer.

6
stix/lib/stix.h
View File

@ -48,6 +48,7 @@ enum stix_errnum_t
STIX_ESYSMEM, /**< insufficient system memory */
STIX_EOOMEM, /**< insufficient object memory */
STIX_EINVAL, /**< invalid parameter or data */
STIX_EMSGSND, /**< message sending error. even doesNotUnderstand: is not found */
STIX_ERANGE, /**< range error. overflow and underflow */
STIX_ENOENT, /**< no matching entry */
STIX_EDFULL, /**< dictionary full */
@ -804,6 +805,7 @@ struct stix_t
stix_ooi_t sp;
stix_ooi_t ip;
int proc_switched; /* TODO: this is temporary. implement something else to skip immediate context switching */
int switch_proc;
/* == END EXECUTION REGISTERS == */
/* == BIGINT CONVERSION == */
@ -819,11 +821,13 @@ struct stix_t
#endif
};
#if defined(__cplusplus)
extern "C" {
#endif
#define stix_switchprocess(stix) ((stix)->switch_proc = 1)
STIX_EXPORT stix_t* stix_open (
stix_mmgr_t* mmgr,
stix_oow_t xtnsize,