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-rw-r--r--erts/emulator/sys/unix/erl_unix_sys.h39
-rw-r--r--erts/emulator/sys/unix/sys.c458
-rw-r--r--erts/emulator/sys/unix/sys_float.c4
-rw-r--r--erts/emulator/sys/win32/erl_win_sys.h12
-rw-r--r--erts/emulator/sys/win32/sys.c137
5 files changed, 473 insertions, 177 deletions
diff --git a/erts/emulator/sys/unix/erl_unix_sys.h b/erts/emulator/sys/unix/erl_unix_sys.h
index 26ed2fb558..f0050db114 100644
--- a/erts/emulator/sys/unix/erl_unix_sys.h
+++ b/erts/emulator/sys/unix/erl_unix_sys.h
@@ -45,7 +45,7 @@
#include <fcntl.h>
#include "erl_errno.h"
#include <signal.h>
-
+#include <setjmp.h>
#if HAVE_SYS_SOCKETIO_H
# include <sys/socketio.h>
@@ -188,7 +188,7 @@ typedef hrtime_t SysHrTime;
#endif /* GETHRTIME_WITH_CLOCK_GETTIME */
#endif /* HAVE_GETHRTIME */
-#if (defined(HAVE_GETHRVTIME) || defined(HAVE_CLOCK_GETTIME))
+#if (defined(HAVE_GETHRVTIME) || defined(HAVE_CLOCK_GETTIME_CPU_TIME))
typedef long long SysCpuTime;
typedef struct timespec SysTimespec;
@@ -200,7 +200,7 @@ typedef struct timespec SysTimespec;
int sys_start_hrvtime(void);
int sys_stop_hrvtime(void);
-#elif defined(HAVE_CLOCK_GETTIME)
+#elif defined(HAVE_CLOCK_GETTIME_CPU_TIME)
#define sys_clock_gettime(cid,tp) clock_gettime((cid),&(tp))
#define sys_get_proc_cputime(t,tp) sys_clock_gettime(CLOCK_PROCESS_CPUTIME_ID,(tp))
@@ -211,13 +211,8 @@ int sys_stop_hrvtime(void);
#define SYS_CLOCK_RESOLUTION 1
/* These are defined in sys.c */
-#if defined(SIG_SIGSET) /* Old SysV */
-RETSIGTYPE (*sys_sigset())();
-#elif defined(SIG_SIGNAL) /* Old BSD */
-RETSIGTYPE (*sys_sigset())();
-#else
-RETSIGTYPE (*sys_sigset(int, RETSIGTYPE (*func)(int)))(int);
-#endif
+typedef void (*SIGFUNC)(int);
+extern SIGFUNC sys_signal(int, SIGFUNC);
extern void sys_sigrelease(int);
extern void sys_sigblock(int);
extern void sys_stop_cat(void);
@@ -354,4 +349,28 @@ extern int exit_async(void);
#define ERTS_EXIT_AFTER_DUMP _exit
+#if !defined(__APPLE__) && !defined(__MACH__)
+/* Some OS X versions do not allow (ab)using signal handlers like this */
+#define ERTS_HAVE_TRY_CATCH 1
+
+/* We try to simulate a try catch in C with the help of signal handlers.
+ * Only use this as a very last resort, as it is not very portable and
+ * quite unstable. It is also not thread safe, so make sure that only
+ * one thread can call this at a time!
+ */
+extern void erts_sys_sigsegv_handler(int);
+extern jmp_buf erts_sys_sigsegv_jmp;
+#define ERTS_SYS_TRY_CATCH(EXPR,CATCH) \
+ do { \
+ SIGFUNC prev_handler = sys_signal(SIGSEGV, \
+ erts_sys_sigsegv_handler); \
+ if (!setjmp(erts_sys_sigsegv_jmp)) { \
+ EXPR; \
+ } else { \
+ CATCH; \
+ } \
+ sys_signal(SIGSEGV,prev_handler); \
+ } while(0)
+#endif
+
#endif /* #ifndef _ERL_UNIX_SYS_H */
diff --git a/erts/emulator/sys/unix/sys.c b/erts/emulator/sys/unix/sys.c
index 0d677d5f34..6248651882 100644
--- a/erts/emulator/sys/unix/sys.c
+++ b/erts/emulator/sys/unix/sys.c
@@ -34,6 +34,7 @@
#include <termios.h>
#include <ctype.h>
#include <sys/utsname.h>
+#include <sys/select.h>
#ifdef ISC32
#include <sys/bsdtypes.h>
@@ -85,14 +86,24 @@ static erts_smp_rwmtx_t environ_rwmtx;
#define DISABLE_VFORK 0
#endif
+#if defined IOV_MAX
+#define MAXIOV IOV_MAX
+#elif defined UIO_MAXIOV
+#define MAXIOV UIO_MAXIOV
+#else
+#define MAXIOV 16
+#endif
+
#ifdef USE_THREADS
# ifdef ENABLE_CHILD_WAITER_THREAD
# define CHLDWTHR ENABLE_CHILD_WAITER_THREAD
# else
# define CHLDWTHR 0
# endif
+# define FDBLOCK 1
#else
# define CHLDWTHR 0
+# define FDBLOCK 0
#endif
/*
* [OTP-3906]
@@ -121,6 +132,15 @@ struct ErtsSysReportExit_ {
#endif
};
+/* Used by the fd driver iff the fd could not be set to non-blocking */
+typedef struct ErtsSysBlocking_ {
+ ErlDrvPDL pdl;
+ int res;
+ int err;
+ unsigned int pkey;
+} ErtsSysBlocking;
+
+
/* This data is shared by these drivers - initialized by spawn_init() */
static struct driver_data {
ErlDrvPort port_num;
@@ -129,6 +149,8 @@ static struct driver_data {
int pid;
int alive;
int status;
+ int terminating;
+ ErtsSysBlocking *blocking;
} *driver_data; /* indexed by fd */
static ErtsSysReportExit *report_exit_list;
@@ -202,10 +224,15 @@ static erts_smp_atomic_t sys_misc_mem_sz;
#if defined(ERTS_SMP)
static void smp_sig_notify(char c);
static int sig_notify_fds[2] = {-1, -1};
+
+static int sig_suspend_fds[2] = {-1, -1};
+#define ERTS_SYS_SUSPEND_SIGNAL SIGUSR2
#elif defined(USE_THREADS)
static int async_fd[2];
#endif
+jmp_buf erts_sys_sigsegv_jmp;
+
#if CHLDWTHR || defined(ERTS_SMP)
erts_mtx_t chld_stat_mtx;
#endif
@@ -632,39 +659,7 @@ erl_sys_init(void)
/* signal handling */
-#ifdef SIG_SIGSET /* Old SysV */
-RETSIGTYPE (*sys_sigset(sig, func))()
-int sig;
-RETSIGTYPE (*func)();
-{
- return(sigset(sig, func));
-}
-void sys_sigblock(int sig)
-{
- sighold(sig);
-}
-void sys_sigrelease(int sig)
-{
- sigrelse(sig);
-}
-#else /* !SIG_SIGSET */
-#ifdef SIG_SIGNAL /* Old BSD */
-RETSIGTYPE (*sys_sigset(sig, func))(int, int)
-int sig;
-RETSIGTYPE (*func)();
-{
- return(signal(sig, func));
-}
-sys_sigblock(int sig)
-{
- sigblock(sig);
-}
-sys_sigrelease(int sig)
-{
- sigsetmask(sigblock(0) & ~sigmask(sig));
-}
-#else /* !SIG_SIGNAL */ /* The True Way - POSIX!:-) */
-RETSIGTYPE (*sys_sigset(int sig, RETSIGTYPE (*func)(int)))(int)
+SIGFUNC sys_signal(int sig, SIGFUNC func)
{
struct sigaction act, oact;
@@ -697,23 +692,35 @@ void sys_sigrelease(int sig)
sigaddset(&mask, sig);
sigprocmask(SIG_UNBLOCK, &mask, (sigset_t *)NULL);
}
-#endif /* !SIG_SIGNAL */
-#endif /* !SIG_SIGSET */
-#if (0) /* not used? -- gordon */
-static void (*break_func)();
-static RETSIGTYPE break_handler(int sig)
-{
-#ifdef QNX
- /* Turn off SIGCHLD during break processing */
- sys_sigblock(SIGCHLD);
-#endif
- (*break_func)();
-#ifdef QNX
- sys_sigrelease(SIGCHLD);
-#endif
+void erts_sys_sigsegv_handler(int signo) {
+ if (signo == SIGSEGV) {
+ longjmp(erts_sys_sigsegv_jmp, 1);
+ }
+}
+
+/*
+ * Function returns 1 if we can read from all values in between
+ * start and stop.
+ */
+int
+erts_sys_is_area_readable(char *start, char *stop) {
+ int fds[2];
+ if (!pipe(fds)) {
+ /* We let write try to figure out if the pointers are readable */
+ int res = write(fds[1], start, (char*)stop - (char*)start);
+ if (res == -1) {
+ close(fds[0]);
+ close(fds[1]);
+ return 0;
+ }
+ close(fds[0]);
+ close(fds[1]);
+ return 1;
+ }
+ return 0;
+
}
-#endif /* 0 */
static ERTS_INLINE int
prepare_crash_dump(int secs)
@@ -775,6 +782,9 @@ prepare_crash_dump(int secs)
/* We don't want to close the signal notification pipe... */
if (i == sig_notify_fds[0] || i == sig_notify_fds[1])
continue;
+ /* We don't want to close the signal syspend pipe... */
+ if (i == sig_suspend_fds[0] || i == sig_suspend_fds[1])
+ continue;
#elif defined(USE_THREADS)
/* We don't want to close the async notification pipe... */
if (i == async_fd[0] || i == async_fd[1])
@@ -863,9 +873,23 @@ sigusr1_exit(void)
#ifdef ETHR_UNUSABLE_SIGUSRX
#warning "Unusable SIGUSR1 & SIGUSR2. Disabling use of these signals"
-#endif
-#ifndef ETHR_UNUSABLE_SIGUSRX
+#else
+
+#ifdef ERTS_SMP
+void
+sys_thr_suspend(erts_tid_t tid) {
+ erts_thr_kill(tid, ERTS_SYS_SUSPEND_SIGNAL);
+}
+
+void
+sys_thr_resume(erts_tid_t tid) {
+ int i = 0, res;
+ do {
+ res = write(sig_suspend_fds[1],&i,sizeof(i));
+ } while (res < 0 && errno == EAGAIN);
+}
+#endif
#if (defined(SIG_SIGSET) || defined(SIG_SIGNAL))
static RETSIGTYPE user_signal1(void)
@@ -880,20 +904,20 @@ static RETSIGTYPE user_signal1(int signum)
#endif
}
-#ifdef QUANTIFY
+#ifdef ERTS_SMP
#if (defined(SIG_SIGSET) || defined(SIG_SIGNAL))
-static RETSIGTYPE user_signal2(void)
+static RETSIGTYPE suspend_signal(void)
#else
-static RETSIGTYPE user_signal2(int signum)
+static RETSIGTYPE suspend_signal(int signum)
#endif
{
-#ifdef ERTS_SMP
- smp_sig_notify('2');
-#else
- quantify_save_data();
-#endif
+ int res;
+ int buf[1];
+ do {
+ res = read(sig_suspend_fds[0], buf, sizeof(int));
+ } while (res < 0 && errno == EINTR);
}
-#endif
+#endif /* #ifdef ERTS_SMP */
#endif /* #ifndef ETHR_UNUSABLE_SIGUSRX */
@@ -918,9 +942,9 @@ static RETSIGTYPE do_quit(int signum)
/* Disable break */
void erts_set_ignore_break(void) {
- sys_sigset(SIGINT, SIG_IGN);
- sys_sigset(SIGQUIT, SIG_IGN);
- sys_sigset(SIGTSTP, SIG_IGN);
+ sys_signal(SIGINT, SIG_IGN);
+ sys_signal(SIGQUIT, SIG_IGN);
+ sys_signal(SIGTSTP, SIG_IGN);
}
/* Don't use ctrl-c for break handler but let it be
@@ -943,14 +967,14 @@ void erts_replace_intr(void) {
void init_break_handler(void)
{
- sys_sigset(SIGINT, request_break);
+ sys_signal(SIGINT, request_break);
#ifndef ETHR_UNUSABLE_SIGUSRX
- sys_sigset(SIGUSR1, user_signal1);
-#ifdef QUANTIFY
- sys_sigset(SIGUSR2, user_signal2);
-#endif
+ sys_signal(SIGUSR1, user_signal1);
+#ifdef ERTS_SMP
+ sys_signal(ERTS_SYS_SUSPEND_SIGNAL, suspend_signal);
+#endif /* #ifdef ERTS_SMP */
#endif /* #ifndef ETHR_UNUSABLE_SIGUSRX */
- sys_sigset(SIGQUIT, do_quit);
+ sys_signal(SIGQUIT, do_quit);
}
int sys_max_files(void)
@@ -967,8 +991,13 @@ static void block_signals(void)
sys_sigblock(SIGINT);
#ifndef ETHR_UNUSABLE_SIGUSRX
sys_sigblock(SIGUSR1);
+#endif /* #ifndef ETHR_UNUSABLE_SIGUSRX */
+#endif /* #ifndef ERTS_SMP */
+
+#if defined(ERTS_SMP) && !defined(ETHR_UNUSABLE_SIGUSRX)
+ sys_sigblock(ERTS_SYS_SUSPEND_SIGNAL);
#endif
-#endif
+
}
static void unblock_signals(void)
@@ -982,8 +1011,14 @@ static void unblock_signals(void)
#ifndef ETHR_UNUSABLE_SIGUSRX
sys_sigrelease(SIGUSR1);
#endif /* #ifndef ETHR_UNUSABLE_SIGUSRX */
+#endif /* #ifndef ERTS_SMP */
+
+#if defined(ERTS_SMP) && !defined(ETHR_UNUSABLE_SIGUSRX)
+ sys_sigrelease(ERTS_SYS_SUSPEND_SIGNAL);
#endif
+
}
+
/************************** Time stuff **************************/
#ifdef HAVE_GETHRTIME
#ifdef GETHRTIME_WITH_CLOCK_GETTIME
@@ -1108,11 +1143,16 @@ void fini_getenv_state(GETENV_STATE *state)
/* Driver interfaces */
static ErlDrvData spawn_start(ErlDrvPort, char*, SysDriverOpts*);
static ErlDrvData fd_start(ErlDrvPort, char*, SysDriverOpts*);
+#if FDBLOCK
+static void fd_async(void *);
+static void fd_ready_async(ErlDrvData drv_data, ErlDrvThreadData thread_data);
+#endif
static ErlDrvSSizeT fd_control(ErlDrvData, unsigned int, char *, ErlDrvSizeT,
char **, ErlDrvSizeT);
static ErlDrvData vanilla_start(ErlDrvPort, char*, SysDriverOpts*);
static int spawn_init(void);
static void fd_stop(ErlDrvData);
+static void fd_flush(ErlDrvData);
static void stop(ErlDrvData);
static void ready_input(ErlDrvData, ErlDrvEvent);
static void ready_output(ErlDrvData, ErlDrvEvent);
@@ -1157,8 +1197,12 @@ struct erl_drv_entry fd_driver_entry = {
fd_control,
NULL,
outputv,
- NULL, /* ready_async */
- NULL, /* flush */
+#if FDBLOCK
+ fd_ready_async, /* ready_async */
+#else
+ NULL,
+#endif
+ fd_flush, /* flush */
NULL, /* call */
NULL, /* event */
ERL_DRV_EXTENDED_MARKER,
@@ -1212,13 +1256,28 @@ static RETSIGTYPE onchld(int signum)
#endif
}
+static int set_blocking_data(struct driver_data *dd) {
+
+ dd->blocking = erts_alloc(ERTS_ALC_T_SYS_BLOCKING, sizeof(ErtsSysBlocking));
+
+ erts_smp_atomic_add_nob(&sys_misc_mem_sz, sizeof(ErtsSysBlocking));
+
+ dd->blocking->pdl = driver_pdl_create(dd->port_num);
+ dd->blocking->res = 0;
+ dd->blocking->err = 0;
+ dd->blocking->pkey = driver_async_port_key(dd->port_num);
+
+ return 1;
+}
+
static int set_driver_data(ErlDrvPort port_num,
int ifd,
int ofd,
int packet_bytes,
int read_write,
int exit_status,
- int pid)
+ int pid,
+ int is_blocking)
{
Port *prt;
ErtsSysReportExit *report_exit;
@@ -1250,8 +1309,13 @@ static int set_driver_data(ErlDrvPort port_num,
driver_data[ifd].pid = pid;
driver_data[ifd].alive = 1;
driver_data[ifd].status = 0;
+ driver_data[ifd].terminating = 0;
+ driver_data[ifd].blocking = NULL;
if (read_write & DO_WRITE) {
driver_data[ifd].ofd = ofd;
+ if (is_blocking && FDBLOCK)
+ if (!set_blocking_data(driver_data+ifd))
+ return -1;
if (ifd != ofd)
driver_data[ofd] = driver_data[ifd]; /* structure copy */
} else { /* DO_READ only */
@@ -1267,6 +1331,11 @@ static int set_driver_data(ErlDrvPort port_num,
driver_data[ofd].pid = pid;
driver_data[ofd].alive = 1;
driver_data[ofd].status = 0;
+ driver_data[ofd].terminating = 0;
+ driver_data[ofd].blocking = NULL;
+ if (is_blocking && FDBLOCK)
+ if (!set_blocking_data(driver_data+ofd))
+ return -1;
return(ofd);
}
}
@@ -1276,11 +1345,13 @@ static int spawn_init()
int i;
#if CHLDWTHR
erts_thr_opts_t thr_opts = ERTS_THR_OPTS_DEFAULT_INITER;
+
thr_opts.detached = 0;
thr_opts.suggested_stack_size = 0; /* Smallest possible */
+ thr_opts.name = "child_waiter";
#endif
- sys_sigset(SIGPIPE, SIG_IGN); /* Ignore - we'll handle the write failure */
+ sys_signal(SIGPIPE, SIG_IGN); /* Ignore - we'll handle the write failure */
driver_data = (struct driver_data *)
erts_alloc(ERTS_ALC_T_DRV_TAB, max_files * sizeof(struct driver_data));
erts_smp_atomic_add_nob(&sys_misc_mem_sz,
@@ -1293,7 +1364,7 @@ static int spawn_init()
sys_sigblock(SIGCHLD);
#endif
- sys_sigset(SIGCHLD, onchld); /* Reap children */
+ sys_signal(SIGCHLD, onchld); /* Reap children */
#if CHLDWTHR
erts_thr_create(&child_waiter_tid, child_waiter, NULL, &thr_opts);
@@ -1755,7 +1826,7 @@ static ErlDrvData spawn_start(ErlDrvPort port_num, char* name, SysDriverOpts* op
}
res = set_driver_data(port_num, ifd[0], ofd[1], opts->packet_bytes,
- opts->read_write, opts->exit_status, pid);
+ opts->read_write, opts->exit_status, pid, 0);
/* Don't unblock SIGCHLD until now, since the call above must
first complete putting away the info about our new subprocess. */
unblock_signals();
@@ -1840,6 +1911,7 @@ static ErlDrvData fd_start(ErlDrvPort port_num, char* name,
SysDriverOpts* opts)
{
ErlDrvData res;
+ int non_blocking = 0;
if (((opts->read_write & DO_READ) && opts->ifd >= max_files) ||
((opts->read_write & DO_WRITE) && opts->ofd >= max_files))
@@ -1912,6 +1984,20 @@ static ErlDrvData fd_start(ErlDrvPort port_num, char* name,
* case - it can be called with any old pre-existing file descriptors,
* the relations between which (if they're even two) we can only guess
* at - still, we try our best...
+ *
+ * Added note OTP 18: Some systems seem to use stdout/stderr to log data
+ * using unix pipes, so we cannot allow the system to block on a write.
+ * Therefore we use an async thread to write the data to fd's that could
+ * not be set to non-blocking. When no async threads are available we
+ * fall back on the old behaviour.
+ *
+ * Also the guarantee about what is delivered to the OS has changed.
+ * Pre 18 the fd driver did no flushing of data before terminating.
+ * Now it does. This is because we want to be able to guarantee that things
+ * such as escripts and friends really have outputted all data before
+ * terminating. This could potentially block the termination of the system
+ * for a very long time, but if the user wants to terminate fast she should
+ * use erlang:halt with flush=false.
*/
if (opts->read_write & DO_READ) {
@@ -1934,6 +2020,7 @@ static ErlDrvData fd_start(ErlDrvPort port_num, char* name,
imagine a scenario where setting non-blocking mode
here would cause problems - go ahead and do it. */
+ non_blocking = 1;
SET_NONBLOCKING(opts->ofd);
} else { /* output fd is a tty, input fd isn't */
@@ -1976,6 +2063,7 @@ static ErlDrvData fd_start(ErlDrvPort port_num, char* name,
(nfd = open(tty, O_WRONLY)) != -1) {
dup2(nfd, opts->ofd);
close(nfd);
+ non_blocking = 1;
SET_NONBLOCKING(opts->ofd);
}
}
@@ -1984,8 +2072,9 @@ static ErlDrvData fd_start(ErlDrvPort port_num, char* name,
}
CHLD_STAT_LOCK;
res = (ErlDrvData)(long)set_driver_data(port_num, opts->ifd, opts->ofd,
- opts->packet_bytes,
- opts->read_write, 0, -1);
+ opts->packet_bytes,
+ opts->read_write, 0, -1,
+ !non_blocking);
CHLD_STAT_UNLOCK;
return res;
}
@@ -2011,14 +2100,30 @@ static void nbio_stop_fd(ErlDrvPort prt, int fd)
SET_BLOCKING(fd);
}
-static void fd_stop(ErlDrvData fd) /* Does not close the fds */
+static void fd_stop(ErlDrvData ev) /* Does not close the fds */
{
int ofd;
+ int fd = (int)(long)ev;
+ ErlDrvPort prt = driver_data[fd].port_num;
- nbio_stop_fd(driver_data[(int)(long)fd].port_num, (int)(long)fd);
- ofd = driver_data[(int)(long)fd].ofd;
- if (ofd != (int)(long)fd && ofd != -1)
- nbio_stop_fd(driver_data[(int)(long)fd].port_num, (int)(long)ofd);
+#if FDBLOCK
+ if (driver_data[fd].blocking) {
+ erts_free(ERTS_ALC_T_SYS_BLOCKING,driver_data[fd].blocking);
+ driver_data[fd].blocking = NULL;
+ erts_smp_atomic_add_nob(&sys_misc_mem_sz, -1*sizeof(ErtsSysBlocking));
+ }
+#endif
+
+ nbio_stop_fd(prt, fd);
+ ofd = driver_data[fd].ofd;
+ if (ofd != fd && ofd != -1)
+ nbio_stop_fd(prt, ofd);
+}
+
+static void fd_flush(ErlDrvData fd)
+{
+ if (!driver_data[(int)(long)fd].terminating)
+ driver_data[(int)(long)fd].terminating = 1;
}
static ErlDrvData vanilla_start(ErlDrvPort port_num, char* name,
@@ -2041,8 +2146,8 @@ static ErlDrvData vanilla_start(ErlDrvPort port_num, char* name,
CHLD_STAT_LOCK;
res = (ErlDrvData)(long)set_driver_data(port_num, fd, fd,
- opts->packet_bytes,
- opts->read_write, 0, -1);
+ opts->packet_bytes,
+ opts->read_write, 0, -1, 0);
CHLD_STAT_UNLOCK;
return res;
}
@@ -2079,6 +2184,7 @@ static void stop(ErlDrvData fd)
}
}
+/* used by fd_driver */
static void outputv(ErlDrvData e, ErlIOVec* ev)
{
int fd = (int)(long)e;
@@ -2104,12 +2210,21 @@ static void outputv(ErlDrvData e, ErlIOVec* ev)
ev->iov[0].iov_base = lbp;
ev->iov[0].iov_len = pb;
ev->size += pb;
+
+ if (driver_data[fd].blocking && FDBLOCK)
+ driver_pdl_lock(driver_data[fd].blocking->pdl);
+
if ((sz = driver_sizeq(ix)) > 0) {
driver_enqv(ix, ev, 0);
+
+ if (driver_data[fd].blocking && FDBLOCK)
+ driver_pdl_unlock(driver_data[fd].blocking->pdl);
+
if (sz + ev->size >= (1 << 13))
set_busy_port(ix, 1);
}
- else {
+ else if (!driver_data[fd].blocking || !FDBLOCK) {
+ /* We try to write directly if the fd in non-blocking */
int vsize = ev->vsize > MAX_VSIZE ? MAX_VSIZE : ev->vsize;
n = writev(ofd, (const void *) (ev->iov), vsize);
@@ -2125,10 +2240,22 @@ static void outputv(ErlDrvData e, ErlIOVec* ev)
driver_enqv(ix, ev, n); /* n is the skip value */
driver_select(ix, ofd, ERL_DRV_WRITE|ERL_DRV_USE, 1);
}
+#if FDBLOCK
+ else {
+ if (ev->size != 0) {
+ driver_enqv(ix, ev, 0);
+ driver_pdl_unlock(driver_data[fd].blocking->pdl);
+ driver_async(ix, &driver_data[fd].blocking->pkey,
+ fd_async, driver_data+fd, NULL);
+ } else {
+ driver_pdl_unlock(driver_data[fd].blocking->pdl);
+ }
+ }
+#endif
/* return 0;*/
}
-
+/* Used by spawn_driver and vanilla driver */
static void output(ErlDrvData e, char* buf, ErlDrvSizeT len)
{
int fd = (int)(long)e;
@@ -2191,6 +2318,23 @@ static int port_inp_failure(ErlDrvPort port_num, int ready_fd, int res)
ASSERT(res <= 0);
(void) driver_select(port_num, ready_fd, ERL_DRV_READ|ERL_DRV_WRITE, 0);
clear_fd_data(ready_fd);
+
+ if (driver_data[ready_fd].blocking && FDBLOCK) {
+ driver_pdl_lock(driver_data[ready_fd].blocking->pdl);
+ if (driver_sizeq(driver_data[ready_fd].port_num) > 0) {
+ driver_pdl_unlock(driver_data[ready_fd].blocking->pdl);
+ /* We have stuff in the output queue, so we just
+ set the state to terminating and wait for fd_async_ready
+ to terminate the port */
+ if (res == 0)
+ driver_data[ready_fd].terminating = 2;
+ else
+ driver_data[ready_fd].terminating = -err;
+ return 0;
+ }
+ driver_pdl_unlock(driver_data[ready_fd].blocking->pdl);
+ }
+
if (res == 0) {
if (driver_data[ready_fd].report_exit) {
CHLD_STAT_LOCK;
@@ -2241,6 +2385,7 @@ static void ready_input(ErlDrvData e, ErlDrvEvent ready_fd)
port_num = driver_data[fd].port_num;
packet_bytes = driver_data[fd].packet_bytes;
+
if (packet_bytes == 0) {
byte *read_buf = (byte *) erts_alloc(ERTS_ALC_T_SYS_READ_BUF,
ERTS_SYS_READ_BUF_SZ);
@@ -2364,6 +2509,8 @@ static void ready_output(ErlDrvData e, ErlDrvEvent ready_fd)
if ((iv = (struct iovec*) driver_peekq(ix, &vsize)) == NULL) {
driver_select(ix, ready_fd, ERL_DRV_WRITE, 0);
+ if (driver_data[fd].terminating)
+ driver_failure_atom(driver_data[fd].port_num,"normal");
return; /* 0; */
}
vsize = vsize > MAX_VSIZE ? MAX_VSIZE : vsize;
@@ -2389,6 +2536,78 @@ static void stop_select(ErlDrvEvent fd, void* _)
close((int)fd);
}
+#if FDBLOCK
+
+static void
+fd_async(void *async_data)
+{
+ int res;
+ struct driver_data *dd = (struct driver_data*)async_data;
+ SysIOVec *iov0;
+ SysIOVec *iov;
+ int iovlen;
+ int err;
+ /* much of this code is stolen from efile_drv:invoke_writev */
+ driver_pdl_lock(dd->blocking->pdl);
+ iov0 = driver_peekq(dd->port_num, &iovlen);
+ iovlen = iovlen < MAXIOV ? iovlen : MAXIOV;
+ iov = erts_alloc_fnf(ERTS_ALC_T_SYS_WRITE_BUF,
+ sizeof(SysIOVec)*iovlen);
+ if (!iov) {
+ res = -1;
+ err = ENOMEM;
+ driver_pdl_unlock(dd->blocking->pdl);
+ } else {
+ memcpy(iov,iov0,iovlen*sizeof(SysIOVec));
+ driver_pdl_unlock(dd->blocking->pdl);
+
+ res = writev(dd->ofd, iov, iovlen);
+ err = errno;
+
+ erts_free(ERTS_ALC_T_SYS_WRITE_BUF, iov);
+ }
+ dd->blocking->res = res;
+ dd->blocking->err = err;
+}
+
+void fd_ready_async(ErlDrvData drv_data,
+ ErlDrvThreadData thread_data) {
+ struct driver_data *dd = (struct driver_data *)thread_data;
+ ErlDrvPort port_num = dd->port_num;
+
+ ASSERT(dd->blocking);
+ ASSERT(dd == (driver_data + (int)(long)drv_data));
+
+ if (dd->blocking->res > 0) {
+ driver_pdl_lock(dd->blocking->pdl);
+ if (driver_deq(port_num, dd->blocking->res) == 0) {
+ driver_pdl_unlock(dd->blocking->pdl);
+ set_busy_port(port_num, 0);
+ if (dd->terminating) {
+ /* The port is has been ordered to terminate
+ from either fd_flush or port_inp_failure */
+ if (dd->terminating == 1)
+ driver_failure_atom(port_num, "normal");
+ else if (dd->terminating == 2)
+ driver_failure_eof(port_num);
+ else if (dd->terminating < 0)
+ driver_failure_posix(port_num, -dd->terminating);
+ return; /* -1; */
+ }
+ } else {
+ driver_pdl_unlock(dd->blocking->pdl);
+ /* still data left to write in queue */
+ driver_async(port_num, &dd->blocking->pkey, fd_async, dd, NULL);
+ return /* 0; */;
+ }
+ } else if (dd->blocking->res < 0) {
+ driver_failure_posix(port_num, dd->blocking->err);
+ return; /* -1; */
+ }
+ return; /* 0; */
+}
+
+#endif
void erts_do_break_handling(void)
{
@@ -2658,18 +2877,30 @@ void sys_preload_end(Preload* p)
/* Nothing */
}
-/* Read a key from console (?) */
-
+/* Read a key from console, used by break.c
+ Here we assume that all schedulers are stopped so that erl_poll
+ does not interfere with the select below.
+*/
int sys_get_key(fd)
int fd;
{
- int c;
+ int c, ret;
unsigned char rbuf[64];
+ fd_set fds;
fflush(stdout); /* Flush query ??? */
- if ((c = read(fd,rbuf,64)) <= 0) {
- return c;
+ FD_ZERO(&fds);
+ FD_SET(fd,&fds);
+
+ ret = select(fd+1, &fds, NULL, NULL, NULL);
+
+ if (ret == 1) {
+ do {
+ c = read(fd,rbuf,64);
+ } while (c < 0 && errno == EAGAIN);
+ if (c <= 0)
+ return c;
}
return rbuf[0];
@@ -2993,13 +3224,6 @@ signal_dispatcher_thread_func(void *unused)
case '1': /* SIGUSR1 */
sigusr1_exit();
break;
-#ifdef QUANTIFY
- case '2': /* SIGUSR2 */
- quantify_save_data(); /* Might take a substantial amount of
- time, but this is a test/debug
- build */
- break;
-#endif
default:
erl_exit(ERTS_ABORT_EXIT,
"signal-dispatcher thread received unknown "
@@ -3017,6 +3241,7 @@ init_smp_sig_notify(void)
{
erts_smp_thr_opts_t thr_opts = ERTS_SMP_THR_OPTS_DEFAULT_INITER;
thr_opts.detached = 1;
+ thr_opts.name = "sys_sig_dispatcher";
if (pipe(sig_notify_fds) < 0) {
erl_exit(ERTS_ABORT_EXIT,
@@ -3031,6 +3256,17 @@ init_smp_sig_notify(void)
NULL,
&thr_opts);
}
+
+static void
+init_smp_sig_suspend(void) {
+ if (pipe(sig_suspend_fds) < 0) {
+ erl_exit(ERTS_ABORT_EXIT,
+ "Failed to create sig_suspend pipe: %s (%d)\n",
+ erl_errno_id(errno),
+ errno);
+ }
+}
+
#ifdef __DARWIN__
int erts_darwin_main_thread_pipe[2];
@@ -3058,9 +3294,11 @@ erts_sys_main_thread(void)
#endif
smp_sig_notify(0); /* Notify initialized */
- while (1) {
- /* Wait for a signal to arrive... */
+
+ /* Wait for a signal to arrive... */
+
#ifdef __DARWIN__
+ while (1) {
/*
* The wx driver needs to be able to steal the main thread for Cocoa to
* work properly.
@@ -3075,12 +3313,24 @@ erts_sys_main_thread(void)
void* (*func)(void*);
void* arg;
void *resp;
- read(erts_darwin_main_thread_pipe[0],&func,sizeof(void* (*)(void*)));
- read(erts_darwin_main_thread_pipe[0],&arg, sizeof(void*));
+ res = read(erts_darwin_main_thread_pipe[0],&func,sizeof(void* (*)(void*)));
+ if (res != sizeof(void* (*)(void*)))
+ break;
+ res = read(erts_darwin_main_thread_pipe[0],&arg,sizeof(void*));
+ if (res != sizeof(void*))
+ break;
resp = (*func)(arg);
write(erts_darwin_main_thread_result_pipe[1],&resp,sizeof(void *));
}
-#else
+
+ if (res == -1 && errno != EINTR)
+ break;
+ }
+ /* Something broke with the main thread pipe, so we ignore it for now.
+ Most probably erts has closed this pipe and is about to exit. */
+#endif /* #ifdef __DARWIN__ */
+
+ while (1) {
#ifdef DEBUG
int res =
#else
@@ -3089,7 +3339,6 @@ erts_sys_main_thread(void)
select(0, NULL, NULL, NULL, NULL);
ASSERT(res < 0);
ASSERT(errno == EINTR);
-#endif
}
}
@@ -3181,6 +3430,7 @@ erl_sys_args(int* argc, char** argv)
#ifdef ERTS_SMP
init_smp_sig_notify();
+ init_smp_sig_suspend();
#endif
/* Handled arguments have been marked with NULL. Slide arguments
diff --git a/erts/emulator/sys/unix/sys_float.c b/erts/emulator/sys/unix/sys_float.c
index cafeab547e..2ffa649767 100644
--- a/erts/emulator/sys/unix/sys_float.c
+++ b/erts/emulator/sys/unix/sys_float.c
@@ -32,7 +32,7 @@ void
erts_sys_init_float(void)
{
# ifdef SIGFPE
- sys_sigset(SIGFPE, SIG_IGN); /* Ignore so we can test for NaN and Inf */
+ sys_signal(SIGFPE, SIG_IGN); /* Ignore so we can test for NaN and Inf */
# endif
}
@@ -667,7 +667,7 @@ static void fpe_sig_handler(int sig)
static void erts_thread_catch_fp_exceptions(void)
{
- sys_sigset(SIGFPE, fpe_sig_handler);
+ sys_signal(SIGFPE, fpe_sig_handler);
unmask_fpe();
}
diff --git a/erts/emulator/sys/win32/erl_win_sys.h b/erts/emulator/sys/win32/erl_win_sys.h
index 838f0c61eb..fde32c8684 100644
--- a/erts/emulator/sys/win32/erl_win_sys.h
+++ b/erts/emulator/sys/win32/erl_win_sys.h
@@ -236,4 +236,16 @@ typedef long ssize_t;
int init_async(int);
int exit_async(void);
#endif
+
+#define ERTS_HAVE_TRY_CATCH 1
+
+#define ERTS_SYS_TRY_CATCH(EXPR,CATCH) \
+ __try { \
+ EXPR; \
+ } \
+ __except(GetExceptionCode() == EXCEPTION_ACCESS_VIOLATION ? EXCEPTION_EXECUTE_HANDLER : EXCEPTION_CONTINUE_SEARCH) \
+ { \
+ CATCH; \
+ }
+
#endif
diff --git a/erts/emulator/sys/win32/sys.c b/erts/emulator/sys/win32/sys.c
index 0ded6b274e..5d51659b4e 100644
--- a/erts/emulator/sys/win32/sys.c
+++ b/erts/emulator/sys/win32/sys.c
@@ -247,6 +247,27 @@ void erl_sys_args(int* argc, char** argv)
#endif
}
+/*
+ * Function returns 1 if we can read from all values in between
+ * start and stop.
+ */
+int
+erts_sys_is_area_readable(char *start, char *stop) {
+ volatile char tmp;
+ __try
+ {
+ while(start < stop) {
+ tmp = *start;
+ start++;
+ }
+ }
+ __except(EXCEPTION_EXECUTE_HANDLER)
+ {
+ return 0;
+ }
+ return 1;
+}
+
int erts_sys_prepare_crash_dump(int secs)
{
Port *heart_port;
@@ -1392,39 +1413,46 @@ int parse_command(wchar_t* cmd){
return i;
}
-static BOOL need_quotes(wchar_t *str)
-{
- int in_quote = 0;
- int backslashed = 0;
- int naked_space = 0;
- while (*str != L'\0') {
- switch (*str) {
- case L'\\' :
- backslashed = !backslashed;
- break;
- case L'"':
- if (backslashed) {
- backslashed=0;
- } else {
- in_quote = !in_quote;
- }
- break;
- case L' ':
- backslashed = 0;
- if (!(backslashed || in_quote)) {
- naked_space++;
- }
- break;
- default:
- backslashed = 0;
+/*
+ * Translating of command line arguments to correct format. In the examples
+ * below the '' are not part of the actual string.
+ * 'io:format("hello").' -> 'io:format(\"hello\").'
+ * 'io:format("is anybody in there?").' -> '"io:format(\"is anybody in there?\")."'
+ * 'Just nod if you can hear me.' -> '"Just nod if you can hear me."'
+ * 'Is there ""anyone at home?' -> '"Is there \"\"anyone at home?"'
+ * 'Relax."' -> 'Relax.\"'
+ *
+ * If new == NULL we just calculate the length.
+ *
+ * The reason for having to quote all of the is becasue CreateProcessW removes
+ * one level of escaping since it takes a single long command line rather
+ * than the argument chunks that unix uses.
+ */
+static int escape_and_quote(wchar_t *str, wchar_t *new, BOOL *quoted) {
+ int i, j = 0;
+ if (new == NULL)
+ *quoted = FALSE;
+ else if (*quoted)
+ new[j++] = L'"';
+ for ( i = 0; str[i] != L'\0'; i++,j++) {
+ if (str[i] == L' ' && new == NULL && *quoted == FALSE) {
+ *quoted = TRUE;
+ j++;
}
- ++str;
+ /* check if we have to escape quotes */
+ if (str[i] == L'"') {
+ if (new) new[j] = L'\\';
+ j++;
+ }
+ if (new) new[j] = str[i];
+ }
+ if (*quoted) {
+ if (new) new[j] = L'"';
+ j++;
}
- return (naked_space > 0);
+ return j;
}
-
-
/*
*----------------------------------------------------------------------
@@ -1585,31 +1613,24 @@ create_child_process
wcscpy(appname, execPath);
}
if (argv == NULL) {
- BOOL orig_need_q = need_quotes(execPath);
+ BOOL orig_need_q;
wchar_t *ptr;
- int ocl = wcslen(execPath);
+ int ocl = escape_and_quote(execPath, NULL, &orig_need_q);
if (run_cmd) {
newcmdline = (wchar_t *) erts_alloc(ERTS_ALC_T_TMP,
- (ocl + ((orig_need_q) ? 3 : 1)
- + 11)*sizeof(wchar_t));
+ (ocl + 1 + 11)*sizeof(wchar_t));
memcpy(newcmdline,L"cmd.exe /c ",11*sizeof(wchar_t));
ptr = newcmdline + 11;
} else {
newcmdline = (wchar_t *) erts_alloc(ERTS_ALC_T_TMP,
- (ocl + ((orig_need_q) ? 3 : 1))*sizeof(wchar_t));
+ (ocl + 1)*sizeof(wchar_t));
ptr = (wchar_t *) newcmdline;
}
- if (orig_need_q) {
- *ptr++ = L'"';
- }
- memcpy(ptr,execPath,ocl*sizeof(wchar_t));
- ptr += ocl;
- if (orig_need_q) {
- *ptr++ = L'"';
- }
- *ptr = L'\0';
+ ptr += escape_and_quote(execPath, ptr, &orig_need_q);
+ ptr[0] = L'\0';
} else {
- int sum = 1; /* '\0' */
+ int sum = 0;
+ BOOL *qte = NULL;
wchar_t **ar = argv;
wchar_t *n;
wchar_t *save_arg0 = NULL;
@@ -1620,11 +1641,13 @@ create_child_process
if (run_cmd) {
sum += 11; /* cmd.exe /c */
}
+
+ while (*ar != NULL) ar++;
+ qte = erts_alloc(ERTS_ALC_T_TMP, (ar - argv)*sizeof(BOOL));
+
+ ar = argv;
while (*ar != NULL) {
- sum += wcslen(*ar);
- if (need_quotes(*ar)) {
- sum += 2; /* quotes */
- }
+ sum += escape_and_quote(*ar,NULL,qte+(ar - argv));
sum++; /* space */
++ar;
}
@@ -1636,26 +1659,18 @@ create_child_process
n += 11;
}
while (*ar != NULL) {
- int q = need_quotes(*ar);
- sum = wcslen(*ar);
- if (q) {
- *n++ = L'"';
- }
- memcpy(n,*ar,sum*sizeof(wchar_t));
- n += sum;
- if (q) {
- *n++ = L'"';
- }
+ n += escape_and_quote(*ar,n,qte+(ar - argv));
*n++ = L' ';
++ar;
}
- *(n-1) = L'\0';
+ *(n-1) = L'\0'; /* overwrite last space with '\0' */
if (save_arg0 != NULL) {
argv[0] = save_arg0;
}
+ erts_free(ERTS_ALC_T_TMP, qte);
}
- DEBUGF(("Creating child process: %s, createFlags = %d\n", newcmdline, createFlags));
+ DEBUGF((stderr,"Creating child process: %S, createFlags = %d\n", newcmdline, createFlags));
ok = CreateProcessW((wchar_t *) appname,
(wchar_t *) newcmdline,
NULL,
@@ -2190,7 +2205,7 @@ static void fd_stop(ErlDrvData data)
ASSERT(dp->out.flushEvent);
SetEvent(dp->out.flushEvent);
} while (WaitForSingleObject(dp->out.flushReplyEvent, 10) == WAIT_TIMEOUT
- || !(dp->out.flags & DF_THREAD_FLUSHED));
+ && !(dp->out.flags & DF_THREAD_FLUSHED));
}
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-25 19:24:06 +0000