diff options
Diffstat (limited to 'erts/emulator/sys/win32/sys.c')
-rwxr-xr-x | erts/emulator/sys/win32/sys.c | 141 |
1 files changed, 121 insertions, 20 deletions
diff --git a/erts/emulator/sys/win32/sys.c b/erts/emulator/sys/win32/sys.c index c4861b92a2..1cd9072cea 100755 --- a/erts/emulator/sys/win32/sys.c +++ b/erts/emulator/sys/win32/sys.c @@ -1,7 +1,7 @@ /* * %CopyrightBegin% * - * Copyright Ericsson AB 1996-2011. All Rights Reserved. + * Copyright Ericsson AB 1996-2012. All Rights Reserved. * * The contents of this file are subject to the Erlang Public License, * Version 1.1, (the "License"); you may not use this file except in @@ -68,9 +68,9 @@ static int async_write_file(struct async_io* aio, LPVOID buf, DWORD numToWrite); static int get_overlapped_result(struct async_io* aio, LPDWORD pBytesRead, BOOL wait); static BOOL create_child_process(char *, HANDLE, HANDLE, - HANDLE, LPHANDLE, BOOL, - LPVOID, LPTSTR, unsigned, - char **, int *); + HANDLE, LPHANDLE, LPDWORD, BOOL, + LPVOID, LPTSTR, unsigned, + char **, int *); static int create_pipe(LPHANDLE, LPHANDLE, BOOL, BOOL); static int application_type(const char* originalName, char fullPath[MAX_PATH], BOOL search_in_path, BOOL handle_quotes, @@ -248,11 +248,30 @@ void erl_sys_args(int* argc, char** argv) #endif } -void -erts_sys_prepare_crash_dump(void) +int erts_sys_prepare_crash_dump(int secs) { + Port *heart_port; + Eterm heap[3]; + Eterm *hp = heap; + Eterm list = NIL; + + heart_port = erts_get_heart_port(); + + if (heart_port) { + + list = CONS(hp, make_small(8), list); hp += 2; + + /* send to heart port, CMD = 8, i.e. prepare crash dump =o */ + erts_port_output(NULL, ERTS_PORT_SIG_FLG_FORCE_IMM_CALL, heart_port, + heart_port->common.id, list, NULL); + + return 1; + } + /* Windows - free file descriptors are hopefully available */ - return; + /* Alarm not used on windows */ + + return 0; } static void @@ -413,6 +432,8 @@ typedef struct async_io { HANDLE ioAllowed; /* The thread will wait for this event * before starting a new read or write. */ + HANDLE flushEvent; /* Used to signal that a flush should be done. */ + HANDLE flushReplyEvent; /* Used to signal that a flush has been done. */ DWORD pendingError; /* Used to delay presentating an error to Erlang * until the check_io function is entered. */ @@ -852,6 +873,8 @@ init_async_io(AsyncIo* aio, int use_threads) aio->ov.Offset = 0L; aio->ov.OffsetHigh = 0L; aio->ioAllowed = NULL; + aio->flushEvent = NULL; + aio->flushReplyEvent = NULL; aio->pendingError = 0; aio->bytesTransferred = 0; #ifdef ERTS_SMP @@ -864,6 +887,12 @@ init_async_io(AsyncIo* aio, int use_threads) aio->ioAllowed = CreateAutoEvent(FALSE); if (aio->ioAllowed == NULL) return -1; + aio->flushEvent = CreateAutoEvent(FALSE); + if (aio->flushEvent == NULL) + return -1; + aio->flushReplyEvent = CreateAutoEvent(FALSE); + if (aio->flushReplyEvent == NULL) + return -1; } return 0; } @@ -897,6 +926,14 @@ release_async_io(AsyncIo* aio, ErlDrvPort port_num) if (aio->ioAllowed != NULL) CloseHandle(aio->ioAllowed); aio->ioAllowed = NULL; + + if (aio->flushEvent != NULL) + CloseHandle(aio->flushEvent); + aio->flushEvent = NULL; + + if (aio->flushReplyEvent != NULL) + CloseHandle(aio->flushReplyEvent); + aio->flushReplyEvent = NULL; } /* ---------------------------------------------------------------------- @@ -1104,6 +1141,7 @@ spawn_start(ErlDrvPort port_num, char* name, SysDriverOpts* opts) HANDLE hChildStdin = INVALID_HANDLE_VALUE; /* Child's stdin. */ HANDLE hChildStdout = INVALID_HANDLE_VALUE; /* Child's stout. */ HANDLE hChildStderr = INVALID_HANDLE_VALUE; /* Child's sterr. */ + DWORD pid; int close_child_stderr = 0; DriverData* dp; /* Pointer to driver data. */ ErlDrvData retval = ERL_DRV_ERROR_GENERAL; /* Return value. */ @@ -1171,14 +1209,13 @@ spawn_start(ErlDrvPort port_num, char* name, SysDriverOpts* opts) */ DEBUGF(("Spawning \"%s\"\n", name)); - envir = win_build_environment(envir); /* Still an ansi environment, could be - converted to unicode for spawn_executable, but - that is not done (yet) */ + envir = win_build_environment(envir); /* Always a unicode environment */ ok = create_child_process(name, hChildStdin, hChildStdout, hChildStderr, &dp->port_pid, + &pid, opts->hide_window, (LPVOID) envir, (LPTSTR) opts->wd, @@ -1222,6 +1259,12 @@ spawn_start(ErlDrvPort port_num, char* name, SysDriverOpts* opts) #endif retval = set_driver_data(dp, hFromChild, hToChild, opts->read_write, opts->exit_status); + if (retval != ERL_DRV_ERROR_GENERAL && retval != ERL_DRV_ERROR_ERRNO) { + Port *prt = erts_drvport2port_raw(port_num); + /* We assume that this cannot generate a negative number */ + ASSERT(prt); + prt->os_pid = (SWord) pid; + } } if (retval != ERL_DRV_ERROR_GENERAL && retval != ERL_DRV_ERROR_ERRNO) @@ -1365,7 +1408,8 @@ create_child_process HANDLE hStdin, /* The standard input handle for child. */ HANDLE hStdout, /* The standard output handle for child. */ HANDLE hStderr, /* The standard error handle for child. */ - LPHANDLE phPid, /* Pointer to variable to received PID. */ + LPHANDLE phPid, /* Pointer to variable to received Process handle. */ + LPDWORD pdwID, /* Pointer to variable to received Process ID */ BOOL hide, /* Hide the window unconditionally. */ LPVOID env, /* Environment for the child */ LPTSTR wd, /* Working dir for the child */ @@ -1447,7 +1491,8 @@ create_child_process NULL, NULL, TRUE, - createFlags | staticCreateFlags, + createFlags | staticCreateFlags | + CREATE_UNICODE_ENVIRONMENT, env, wd, &siStartInfo, @@ -1575,7 +1620,8 @@ create_child_process NULL, NULL, TRUE, - createFlags | staticCreateFlags, + createFlags | staticCreateFlags | + CREATE_UNICODE_ENVIRONMENT, env, (WCHAR *) wd, &siStartInfo, @@ -1597,7 +1643,8 @@ create_child_process } CloseHandle(piProcInfo.hThread); /* Necessary to avoid resource leak. */ *phPid = piProcInfo.hProcess; - + *pdwID = piProcInfo.dwProcessId; + if (applType == APPL_DOS) { WaitForSingleObject(hProcess, 50); } @@ -2044,16 +2091,26 @@ threaded_writer(LPVOID param) AsyncIo* aio = (AsyncIo *) param; HANDLE thread = GetCurrentThread(); char* buf; - DWORD numToWrite; + DWORD numToWrite, handle; int ok; + HANDLE handles[2]; + handles[0] = aio->ioAllowed; + handles[1] = aio->flushEvent; for (;;) { - WaitForSingleObject(aio->ioAllowed, INFINITE); + handle = WaitForMultipleObjects(2, handles, FALSE, INFINITE); if (aio->flags & DF_EXIT_THREAD) break; + buf = OV_BUFFER_PTR(aio); numToWrite = OV_NUM_TO_READ(aio); aio->pendingError = 0; + + if (handle == (WAIT_OBJECT_0 + 1) && numToWrite == 0) { + SetEvent(aio->flushReplyEvent); + continue; + } + ok = WriteFile(aio->fd, buf, numToWrite, &aio->bytesTransferred, NULL); if (!ok) { aio->pendingError = GetLastError(); @@ -2088,7 +2145,11 @@ threaded_writer(LPVOID param) } } } - SetEvent(aio->ov.hEvent); + OV_NUM_TO_READ(aio) = 0; + if (handle == (WAIT_OBJECT_0 + 1)) + SetEvent(aio->flushReplyEvent); + else + SetEvent(aio->ov.hEvent); if (aio->pendingError != NO_ERROR || aio->bytesTransferred == 0) break; if (aio->flags & DF_EXIT_THREAD) @@ -2154,6 +2215,43 @@ fd_start(ErlDrvPort port_num, char* name, SysDriverOpts* opts) if ((dp = new_driver_data(port_num, opts->packet_bytes, 2, TRUE)) == NULL) return ERL_DRV_ERROR_GENERAL; + /** + * Here is a brief description about how the fd driver works on windows. + * + * fd_init: + * For each in/out fd pair a threaded_reader and threaded_writer thread is + * created. Within the DriverData struct each of the threads have an AsyncIO + * sctruct associated with it. Within AsyncIO there are two important HANDLEs, + * ioAllowed and ov.hEvent. ioAllowed is used to signal the threaded_* threads + * should read/write some data, and ov.hEvent is driver_select'ed to be used to + * signal that the thread is done reading/writing. + * + * The reason for the driver being threaded like this is because once the FD is open + * on windows, it is not possible to set the it in overlapped mode. So we have to + * simulate this using threads. + * + * output: + * When an output occurs the data to be outputted is copied to AsyncIO.ov. Then + * the ioAllowed HANDLE is set, ov.hEvent is cleared and the port is marked as busy. + * The threaded_writer thread is lying in WaitForMultipleObjects on ioAllowed, and + * when signalled it writes all data in AsyncIO.ov and then sets ov.hEvent so that + * ready_output gets triggered and (potentially) sends the reply to the port and + * marks the port an non-busy. + * + * input: + * The threaded_reader is lying waiting in ReadFile on the in fd and when a new + * line is written it sets ov.hEvent that new data is available and then goes + * and waits for ioAllowed to be set. ready_input is run when ov.hEvent is set and + * delivers the data to the port. Then ioAllowed is signalled again and threaded_reader + * goes back to ReadFile. + * + * shutdown: + * In order to guarantee that all io is outputted before the driver is stopped, + * fd_stop uses flushEvent and flushReplyEvent to make sure that there is no data + * in ov which needs writing before returning from fd_stop. + * + **/ + if (!create_file_thread(&dp->in, DO_READ)) { return ERL_DRV_ERROR_GENERAL; } @@ -2199,6 +2297,8 @@ static void fd_stop(ErlDrvData data) (void) driver_select(dp->port_num, (ErlDrvEvent)dp->out.ov.hEvent, ERL_DRV_WRITE, 0); + SetEvent(dp->out.flushEvent); + WaitForSingleObject(dp->out.flushReplyEvent, INFINITE); } } @@ -2709,10 +2809,10 @@ static void stop_select(ErlDrvEvent e, void* _) ** no interpretation of this should be done by the rest of the ** emulator. The buffer should be at least 21 bytes long. */ -void sys_get_pid(char *buffer){ +void sys_get_pid(char *buffer, size_t buffer_size){ DWORD p = GetCurrentProcessId(); /* The pid is scalar and is an unsigned long. */ - sprintf(buffer,"%lu",(unsigned long) p); + erts_snprintf(buffer, buffer_size, "%lu",(unsigned long) p); } void @@ -3052,7 +3152,8 @@ erl_assert_error(char* expr, char* file, int line) { char message[1024]; - sprintf(message, "File %hs, line %d: %hs", file, line, expr); + erts_snprintf(message, sizeof(message), + "File %hs, line %d: %hs", file, line, expr); MessageBox(GetActiveWindow(), message, "Assertion failed", MB_OK | MB_ICONERROR); #if 0 |