diff options
Diffstat (limited to 'erts/emulator/sys/unix/sys.c')
| -rw-r--r-- | erts/emulator/sys/unix/sys.c | 411 |
1 files changed, 34 insertions, 377 deletions
diff --git a/erts/emulator/sys/unix/sys.c b/erts/emulator/sys/unix/sys.c index c1fa660cf9..6315135151 100644 --- a/erts/emulator/sys/unix/sys.c +++ b/erts/emulator/sys/unix/sys.c @@ -58,14 +58,12 @@ #define __DARWIN__ 1 #endif -#ifdef USE_THREADS #include "erl_threads.h" -#endif #include "erl_mseg.h" extern char **environ; -erts_smp_rwmtx_t environ_rwmtx; +erts_rwmtx_t environ_rwmtx; #define MAX_VSIZE 16 /* Max number of entries allowed in an I/O * vector sock_sendv(). @@ -94,19 +92,12 @@ extern void erts_sys_init_float(void); static int debug_log = 0; #endif -#ifdef ERTS_SMP -static erts_smp_atomic32_t have_prepared_crash_dump; -#define ERTS_PREPARED_CRASH_DUMP \ - ((int) erts_smp_atomic32_xchg_nob(&have_prepared_crash_dump, 1)) -#else -static volatile int have_prepared_crash_dump; +static erts_atomic32_t have_prepared_crash_dump; #define ERTS_PREPARED_CRASH_DUMP \ - (have_prepared_crash_dump++) -#endif + ((int) erts_atomic32_xchg_nob(&have_prepared_crash_dump, 1)) -erts_smp_atomic_t sys_misc_mem_sz; +erts_atomic_t sys_misc_mem_sz; -#if defined(ERTS_SMP) static void smp_sig_notify(int signum); static int sig_notify_fds[2] = {-1, -1}; @@ -114,7 +105,6 @@ static int sig_notify_fds[2] = {-1, -1}; static int sig_suspend_fds[2] = {-1, -1}; #endif -#endif jmp_buf erts_sys_sigsegv_jmp; @@ -128,38 +118,12 @@ static int max_files = -1; /* * a few variables used by the break handler */ -#ifdef ERTS_SMP -erts_smp_atomic32_t erts_break_requested; +erts_atomic32_t erts_break_requested; #define ERTS_SET_BREAK_REQUESTED \ - erts_smp_atomic32_set_nob(&erts_break_requested, (erts_aint32_t) 1) + erts_atomic32_set_nob(&erts_break_requested, (erts_aint32_t) 1) #define ERTS_UNSET_BREAK_REQUESTED \ - erts_smp_atomic32_set_nob(&erts_break_requested, (erts_aint32_t) 0) -#else -volatile int erts_break_requested = 0; -#define ERTS_SET_BREAK_REQUESTED (erts_break_requested = 1) -#define ERTS_UNSET_BREAK_REQUESTED (erts_break_requested = 0) -#endif + erts_atomic32_set_nob(&erts_break_requested, (erts_aint32_t) 0) -#ifndef ERTS_SMP -static Eterm signalstate_sigterm[] = { - am_sigint, /* 0 */ - am_sighup, /* 1 */ - am_sigquit, /* 2 */ - am_sigabrt, /* 3 */ - am_sigalrm, /* 4 */ - am_sigterm, /* 5 */ - am_sigusr1, /* 6 */ - am_sigusr2, /* 7 */ - am_sigchld, /* 8 */ - am_sigstop, /* 9 */ - am_sigtstp /* 10 */ -}; - -volatile Uint erts_signal_state = 0; -#define ERTS_SET_SIGNAL_STATE(S) (erts_signal_state |= signum_to_signalstate(S)) -#define ERTS_CLEAR_SIGNAL_STATE (erts_signal_state = 0) -static ERTS_INLINE Uint signum_to_signalstate(int signum); -#endif /* set early so the break handler has access to initial mode */ static struct termios initial_tty_mode; @@ -167,137 +131,6 @@ static int replace_intr = 0; /* assume yes initially, ttsl_init will clear it */ int using_oldshell = 1; -#ifdef ERTS_ENABLE_KERNEL_POLL - -int erts_use_kernel_poll = 0; - -struct { - int (*select)(ErlDrvPort, ErlDrvEvent, int, int); - int (*enif_select)(ErlNifEnv*, ErlNifEvent, enum ErlNifSelectFlags, void*, const ErlNifPid*, Eterm); - int (*event)(ErlDrvPort, ErlDrvEvent, ErlDrvEventData); - void (*check_io_as_interrupt)(void); - void (*check_io_interrupt)(int); - void (*check_io_interrupt_tmd)(int, ErtsMonotonicTime); - void (*check_io)(int); - Uint (*size)(void); - Eterm (*info)(void *); - int (*check_io_debug)(ErtsCheckIoDebugInfo *); -} io_func = {0}; - - -int -driver_select(ErlDrvPort port, ErlDrvEvent event, int mode, int on) -{ - return (*io_func.select)(port, event, mode, on); -} - -int -driver_event(ErlDrvPort port, ErlDrvEvent event, ErlDrvEventData event_data) -{ - return (*io_func.event)(port, event, event_data); -} - -int enif_select(ErlNifEnv* env, ErlNifEvent event, - enum ErlNifSelectFlags flags, void* obj, const ErlNifPid* pid, Eterm ref) -{ - return (*io_func.enif_select)(env, event, flags, obj, pid, ref); -} - - -Eterm erts_check_io_info(void *p) -{ - return (*io_func.info)(p); -} - -int -erts_check_io_debug(ErtsCheckIoDebugInfo *ip) -{ - return (*io_func.check_io_debug)(ip); -} - - -static void -init_check_io(void) -{ - if (erts_use_kernel_poll) { - io_func.select = driver_select_kp; - io_func.enif_select = enif_select_kp; - io_func.event = driver_event_kp; -#ifdef ERTS_POLL_NEED_ASYNC_INTERRUPT_SUPPORT - io_func.check_io_as_interrupt = erts_check_io_async_sig_interrupt_kp; -#endif - io_func.check_io_interrupt = erts_check_io_interrupt_kp; - io_func.check_io_interrupt_tmd = erts_check_io_interrupt_timed_kp; - io_func.check_io = erts_check_io_kp; - io_func.size = erts_check_io_size_kp; - io_func.info = erts_check_io_info_kp; - io_func.check_io_debug = erts_check_io_debug_kp; - erts_init_check_io_kp(); - max_files = erts_check_io_max_files_kp(); - } - else { - io_func.select = driver_select_nkp; - io_func.enif_select = enif_select_nkp; - io_func.event = driver_event_nkp; -#ifdef ERTS_POLL_NEED_ASYNC_INTERRUPT_SUPPORT - io_func.check_io_as_interrupt = erts_check_io_async_sig_interrupt_nkp; -#endif - io_func.check_io_interrupt = erts_check_io_interrupt_nkp; - io_func.check_io_interrupt_tmd = erts_check_io_interrupt_timed_nkp; - io_func.check_io = erts_check_io_nkp; - io_func.size = erts_check_io_size_nkp; - io_func.info = erts_check_io_info_nkp; - io_func.check_io_debug = erts_check_io_debug_nkp; - erts_init_check_io_nkp(); - max_files = erts_check_io_max_files_nkp(); - } -} - -#ifdef ERTS_POLL_NEED_ASYNC_INTERRUPT_SUPPORT -#define ERTS_CHK_IO_AS_INTR() (*io_func.check_io_as_interrupt)() -#else -#define ERTS_CHK_IO_AS_INTR() (*io_func.check_io_interrupt)(1) -#endif -#define ERTS_CHK_IO_INTR (*io_func.check_io_interrupt) -#define ERTS_CHK_IO_INTR_TMD (*io_func.check_io_interrupt_tmd) -#define ERTS_CHK_IO (*io_func.check_io) -#define ERTS_CHK_IO_SZ (*io_func.size) - -#else /* !ERTS_ENABLE_KERNEL_POLL */ - -static void -init_check_io(void) -{ - erts_init_check_io(); - max_files = erts_check_io_max_files(); -} - -#ifdef ERTS_POLL_NEED_ASYNC_INTERRUPT_SUPPORT -#define ERTS_CHK_IO_AS_INTR() erts_check_io_async_sig_interrupt() -#else -#define ERTS_CHK_IO_AS_INTR() erts_check_io_interrupt(1) -#endif -#define ERTS_CHK_IO_INTR erts_check_io_interrupt -#define ERTS_CHK_IO_INTR_TMD erts_check_io_interrupt_timed -#define ERTS_CHK_IO erts_check_io -#define ERTS_CHK_IO_SZ erts_check_io_size - -#endif - -void -erts_sys_schedule_interrupt(int set) -{ - ERTS_CHK_IO_INTR(set); -} - -#ifdef ERTS_SMP -void -erts_sys_schedule_interrupt_timed(int set, ErtsMonotonicTime timeout_time) -{ - ERTS_CHK_IO_INTR_TMD(set, timeout_time); -} -#endif - UWord erts_sys_get_page_size(void) { @@ -313,8 +146,8 @@ erts_sys_get_page_size(void) Uint erts_sys_misc_mem_sz(void) { - Uint res = ERTS_CHK_IO_SZ(); - res += erts_smp_atomic_read_mb(&sys_misc_mem_sz); + Uint res = erts_check_io_size(); + res += erts_atomic_read_mb(&sys_misc_mem_sz); return res; } @@ -339,7 +172,6 @@ MALLOC_USE_HASH(1); #endif #endif -#ifdef USE_THREADS #ifdef ERTS_THR_HAVE_SIG_FUNCS @@ -418,19 +250,15 @@ thr_create_prepare_child(void *vtcdp) erts_sched_bind_atthrcreate_child(tcdp->sched_bind_data); } -#endif /* #ifdef USE_THREADS */ void erts_sys_pre_init(void) { -#ifdef USE_THREADS erts_thr_init_data_t eid = ERTS_THR_INIT_DATA_DEF_INITER; -#endif erts_printf_add_cr_to_stdout = 1; erts_printf_add_cr_to_stderr = 1; -#ifdef USE_THREADS eid.thread_create_child_func = thr_create_prepare_child; /* Before creation in parent */ @@ -452,23 +280,15 @@ erts_sys_pre_init(void) erts_lc_init(); #endif -#endif /* USE_THREADS */ erts_init_sys_time_sup(); -#ifdef USE_THREADS -#ifdef ERTS_SMP - erts_smp_atomic32_init_nob(&erts_break_requested, 0); - erts_smp_atomic32_init_nob(&have_prepared_crash_dump, 0); -#else - erts_break_requested = 0; - have_prepared_crash_dump = 0; -#endif + erts_atomic32_init_nob(&erts_break_requested, 0); + erts_atomic32_init_nob(&have_prepared_crash_dump, 0); -#endif /* USE_THREADS */ - erts_smp_atomic_init_nob(&sys_misc_mem_sz, 0); + erts_atomic_init_nob(&sys_misc_mem_sz, 0); { /* @@ -531,10 +351,8 @@ SIGFUNC sys_signal(int sig, SIGFUNC func) return(oact.sa_handler); } -#ifdef USE_THREADS #undef sigprocmask #define sigprocmask erts_thr_sigmask -#endif void sys_sigblock(int sig) { @@ -672,7 +490,7 @@ static void signal_notify_requested(Eterm type) { erts_queue_message(p, locks, msgp, msg, am_system); if (locks) - erts_smp_proc_unlock(p, locks); + erts_proc_unlock(p, locks); erts_proc_dec_refc(p); } } @@ -685,23 +503,17 @@ break_requested(void) * just set a flag - checked for and handled by * scheduler threads erts_check_io() (not signal handler). */ -#ifdef DEBUG - fprintf(stderr,"break!\n"); -#endif if (ERTS_BREAK_REQUESTED) erts_exit(ERTS_INTR_EXIT, ""); ERTS_SET_BREAK_REQUESTED; - ERTS_CHK_IO_AS_INTR(); /* Make sure we don't sleep in poll */ + /* Wake aux thread to get handle break */ + erts_aux_thread_poke(); } static RETSIGTYPE request_break(int signum) { -#ifdef ERTS_SMP smp_sig_notify(signum); -#else - break_requested(); -#endif } #ifdef ETHR_UNUSABLE_SIGUSRX @@ -789,8 +601,6 @@ signalterm_to_signum(Eterm signal) } } -#ifdef ERTS_SMP - static ERTS_INLINE Eterm signum_to_signalterm(int signum) { @@ -812,37 +622,9 @@ signum_to_signalterm(int signum) } } -#endif - -#ifndef ERTS_SMP -static ERTS_INLINE Uint -signum_to_signalstate(int signum) -{ - switch (signum) { - case SIGINT: return (1 << 0); - case SIGHUP: return (1 << 1); - case SIGQUIT: return (1 << 2); - case SIGABRT: return (1 << 3); - case SIGALRM: return (1 << 4); - case SIGTERM: return (1 << 5); - case SIGUSR1: return (1 << 6); - case SIGUSR2: return (1 << 7); - case SIGCHLD: return (1 << 8); - case SIGSTOP: return (1 << 9); - case SIGTSTP: return (1 << 10); - default: return 0; - } -} -#endif - static RETSIGTYPE generic_signal_handler(int signum) { -#ifdef ERTS_SMP smp_sig_notify(signum); -#else - ERTS_SET_SIGNAL_STATE(signum); - ERTS_CHK_IO_AS_INTR(); /* Make sure we don't sleep in poll */ -#endif } int erts_set_signal(Eterm signal, Eterm type) { @@ -914,7 +696,7 @@ erts_sys_unix_later_init(void) int sys_max_files(void) { - return(max_files); + return max_files; } /************************** OS info *******************************/ @@ -969,7 +751,7 @@ void os_version(int *pMajor, int *pMinor, int *pBuild) { void init_getenv_state(GETENV_STATE *state) { - erts_smp_rwmtx_rlock(&environ_rwmtx); + erts_rwmtx_rlock(&environ_rwmtx); *state = NULL; } @@ -978,7 +760,7 @@ char *getenv_string(GETENV_STATE *state0) char **state = (char **) *state0; char *cp; - ERTS_SMP_LC_ASSERT(erts_smp_lc_rwmtx_is_rlocked(&environ_rwmtx)); + ERTS_LC_ASSERT(erts_lc_rwmtx_is_rlocked(&environ_rwmtx)); if (state == NULL) state = environ; @@ -992,7 +774,7 @@ char *getenv_string(GETENV_STATE *state0) void fini_getenv_state(GETENV_STATE *state) { *state = NULL; - erts_smp_rwmtx_runlock(&environ_rwmtx); + erts_rwmtx_runlock(&environ_rwmtx); } void erts_do_break_handling(void) @@ -1005,7 +787,7 @@ void erts_do_break_handling(void) * therefore, make sure that all threads but this one are blocked before * proceeding! */ - erts_smp_thr_progress_block(); + erts_thr_progress_block(); /* during break we revert to initial settings */ /* this is done differently for oldshell */ @@ -1033,25 +815,9 @@ void erts_do_break_handling(void) tcsetattr(0,TCSANOW,&temp_mode); } - erts_smp_thr_progress_unblock(); + erts_thr_progress_unblock(); } -#ifdef ERTS_SIGNAL_STATE -void erts_handle_signal_state(void) { - Uint signal_state = ERTS_SIGNAL_STATE; - Uint i = 0; - - ERTS_CLEAR_SIGNAL_STATE; - - while (signal_state) { - if (signal_state & 0x1) { - signal_notify_requested(signalstate_sigterm[i]); - } - i++; - signal_state = signal_state >> 1; - } -} -#endif /* Fills in the systems representation of the jam/beam process identifier. ** The Pid is put in STRING representation in the supplied buffer, @@ -1079,14 +845,14 @@ erts_sys_putenv(char *key, char *value) env = erts_alloc(ERTS_ALC_T_TMP, need); #else env = erts_alloc(ERTS_ALC_T_PUTENV_STR, need); - erts_smp_atomic_add_nob(&sys_misc_mem_sz, need); + erts_atomic_add_nob(&sys_misc_mem_sz, need); #endif strcpy(env,key); strcat(env,"="); strcat(env,value); - erts_smp_rwmtx_rwlock(&environ_rwmtx); + erts_rwmtx_rwlock(&environ_rwmtx); res = putenv(env); - erts_smp_rwmtx_rwunlock(&environ_rwmtx); + erts_rwmtx_rwunlock(&environ_rwmtx); #ifdef HAVE_COPYING_PUTENV erts_free(ERTS_ALC_T_TMP, env); #endif @@ -1133,9 +899,9 @@ int erts_sys_getenv(char *key, char *value, size_t *size) { int res; - erts_smp_rwmtx_rlock(&environ_rwmtx); + erts_rwmtx_rlock(&environ_rwmtx); res = erts_sys_getenv__(key, value, size); - erts_smp_rwmtx_runlock(&environ_rwmtx); + erts_rwmtx_runlock(&environ_rwmtx); return res; } @@ -1143,9 +909,9 @@ int erts_sys_unsetenv(char *key) { int res; - erts_smp_rwmtx_rwlock(&environ_rwmtx); + erts_rwmtx_rwlock(&environ_rwmtx); res = unsetenv(key); - erts_smp_rwmtx_rwunlock(&environ_rwmtx); + erts_rwmtx_rwunlock(&environ_rwmtx); return res; } @@ -1286,16 +1052,6 @@ erl_assert_error(const char* expr, const char* func, const char* file, int line) fprintf(stderr, "%s:%d:%s() Assertion failed: %s\n", file, line, func, expr); fflush(stderr); -#if !defined(ERTS_SMP) && 0 - /* Writing a crashdump from a failed assertion when smp support - * is enabled almost a guaranteed deadlocking, don't even bother. - * - * It could maybe be useful (but I'm not convinced) to write the - * crashdump if smp support is disabled... - */ - if (erts_initialized) - erl_crash_dump(file, line, "Assertion failed: %s\n", expr); -#endif abort(); } @@ -1317,22 +1073,7 @@ erl_debug(char* fmt, ...) #endif /* DEBUG */ -/* - * Called from schedule() when it runs out of runnable processes, - * or when Erlang code has performed INPUT_REDUCTIONS reduction - * steps. runnable == 0 iff there are no runnable Erlang processes. - */ -void -erl_sys_schedule(int runnable) -{ - ERTS_CHK_IO(!runnable); - ERTS_SMP_LC_ASSERT(!erts_thr_progress_is_blocking()); -} - - -#ifdef ERTS_SMP - -static erts_smp_tid_t sig_dispatcher_tid; +static erts_tid_t sig_dispatcher_tid; static void smp_sig_notify(int signum) @@ -1406,7 +1147,7 @@ signal_dispatcher_thread_func(void *unused) } signal_notify_requested(signal); } - ERTS_SMP_LC_ASSERT(!erts_thr_progress_is_blocking()); + ERTS_LC_ASSERT(!erts_thr_progress_is_blocking()); } return NULL; } @@ -1414,7 +1155,7 @@ signal_dispatcher_thread_func(void *unused) static void init_smp_sig_notify(void) { - erts_smp_thr_opts_t thr_opts = ERTS_SMP_THR_OPTS_DEFAULT_INITER; + erts_thr_opts_t thr_opts = ERTS_THR_OPTS_DEFAULT_INITER; thr_opts.detached = 1; thr_opts.name = "sys_sig_dispatcher"; @@ -1426,7 +1167,7 @@ init_smp_sig_notify(void) } /* Start signal handler thread */ - erts_smp_thr_create(&sig_dispatcher_tid, + erts_thr_create(&sig_dispatcher_tid, signal_dispatcher_thread_func, NULL, &thr_opts); @@ -1519,103 +1260,19 @@ erts_sys_main_thread(void) } } -#endif /* ERTS_SMP */ - -#ifdef ERTS_ENABLE_KERNEL_POLL /* get_value() is currently only used when - kernel-poll is enabled */ - -/* Get arg marks argument as handled by - putting NULL in argv */ -static char * -get_value(char* rest, char** argv, int* ip) -{ - char *param = argv[*ip]+1; - argv[*ip] = NULL; - if (*rest == '\0') { - char *next = argv[*ip + 1]; - if (next[0] == '-' - && next[1] == '-' - && next[2] == '\0') { - erts_fprintf(stderr, "bad \"%s\" value: \n", param); - erts_usage(); - } - (*ip)++; - argv[*ip] = NULL; - return next; - } - return rest; -} - -#endif /* ERTS_ENABLE_KERNEL_POLL */ void erl_sys_args(int* argc, char** argv) { - int i, j; - erts_smp_rwmtx_init(&environ_rwmtx, "environ", NIL, + erts_rwmtx_init(&environ_rwmtx, "environ", NIL, ERTS_LOCK_FLAGS_PROPERTY_STATIC | ERTS_LOCK_FLAGS_CATEGORY_GENERIC); - i = 1; - ASSERT(argc && argv); - while (i < *argc) { - if(argv[i][0] == '-') { - switch (argv[i][1]) { -#ifdef ERTS_ENABLE_KERNEL_POLL - case 'K': { - char *arg = get_value(argv[i] + 2, argv, &i); - if (strcmp("true", arg) == 0) { - erts_use_kernel_poll = 1; - } - else if (strcmp("false", arg) == 0) { - erts_use_kernel_poll = 0; - } - else { - erts_fprintf(stderr, "bad \"K\" value: %s\n", arg); - erts_usage(); - } - break; - } -#endif - case '-': - goto done_parsing; - default: - break; - } - } - i++; - } - - done_parsing: - -#ifdef ERTS_ENABLE_KERNEL_POLL - if (erts_use_kernel_poll) { - char no_kp[10]; - size_t no_kp_sz = sizeof(no_kp); - int res = erts_sys_getenv_raw("ERL_NO_KERNEL_POLL", no_kp, &no_kp_sz); - if (res > 0 - || (res == 0 - && sys_strcmp("false", no_kp) != 0 - && sys_strcmp("FALSE", no_kp) != 0)) { - erts_use_kernel_poll = 0; - } - } -#endif - - init_check_io(); + max_files = erts_check_io_max_files(); -#ifdef ERTS_SMP init_smp_sig_notify(); init_smp_sig_suspend(); -#endif - /* Handled arguments have been marked with NULL. Slide arguments - not handled towards the beginning of argv. */ - for (i = 0, j = 0; i < *argc; i++) { - if (argv[i]) - argv[j++] = argv[i]; - } - *argc = j; } |