23 * questions.
24 */
25
26 #include <assert.h>
27 #include "java_lang_ProcessImpl.h"
28
29 #include "jni.h"
30 #include "jvm.h"
31 #include "jni_util.h"
32 #include "io_util.h"
33 #include <windows.h>
34 #include <io.h>
35
36 /* We try to make sure that we can read and write 4095 bytes (the
37 * fixed limit on Linux) to the pipe on all operating systems without
38 * deadlock. Windows 2000 inexplicably appears to need an extra 24
39 * bytes of slop to avoid deadlock.
40 */
41 #define PIPE_SIZE (4096+24)
42
43 static void
44 win32Error(JNIEnv *env, const char *functionName)
45 {
46 static const char * const format = "%s error=%d, %s";
47 static const char * const fallbackFormat = "%s failed, error=%d";
48 char buf[256];
49 char errmsg[sizeof(buf) + 100];
50 const int errnum = GetLastError();
51 const int n = JVM_GetLastErrorString(buf, sizeof(buf));
52 if (n > 0)
53 sprintf(errmsg, format, functionName, errnum, buf);
54 else
55 sprintf(errmsg, fallbackFormat, functionName, errnum);
56 JNU_ThrowIOException(env, errmsg);
57 }
58
59 static void
60 closeSafely(HANDLE handle)
61 {
62 if (handle != INVALID_HANDLE_VALUE)
63 CloseHandle(handle);
64 }
65
66 JNIEXPORT jlong JNICALL
67 Java_java_lang_ProcessImpl_create(JNIEnv *env, jclass ignored,
68 jstring cmd,
69 jstring envBlock,
70 jstring dir,
71 jlongArray stdHandles,
72 jboolean redirectErrorStream)
73 {
74 HANDLE inRead = INVALID_HANDLE_VALUE;
75 HANDLE inWrite = INVALID_HANDLE_VALUE;
76 HANDLE outRead = INVALID_HANDLE_VALUE;
99 penvBlock = ((*env)->GetStringChars(env, envBlock, NULL));
100 if (penvBlock == NULL) goto Catch;
101 }
102 assert(stdHandles != NULL);
103 handles = (*env)->GetLongArrayElements(env, stdHandles, NULL);
104 if (handles == NULL) goto Catch;
105
106 memset(&si, 0, sizeof(si));
107 si.cb = sizeof(si);
108 si.dwFlags = STARTF_USESTDHANDLES;
109
110 sa.nLength = sizeof(sa);
111 sa.lpSecurityDescriptor = 0;
112 sa.bInheritHandle = TRUE;
113
114 if (handles[0] != (jlong) -1) {
115 si.hStdInput = (HANDLE) handles[0];
116 handles[0] = (jlong) -1;
117 } else {
118 if (! CreatePipe(&inRead, &inWrite, &sa, PIPE_SIZE)) {
119 win32Error(env, "CreatePipe");
120 goto Catch;
121 }
122 si.hStdInput = inRead;
123 SetHandleInformation(inWrite, HANDLE_FLAG_INHERIT, 0);
124 handles[0] = (jlong) inWrite;
125 }
126 SetHandleInformation(si.hStdInput,
127 HANDLE_FLAG_INHERIT,
128 HANDLE_FLAG_INHERIT);
129
130 if (handles[1] != (jlong) -1) {
131 si.hStdOutput = (HANDLE) handles[1];
132 handles[1] = (jlong) -1;
133 } else {
134 if (! CreatePipe(&outRead, &outWrite, &sa, PIPE_SIZE)) {
135 win32Error(env, "CreatePipe");
136 goto Catch;
137 }
138 si.hStdOutput = outWrite;
139 SetHandleInformation(outRead, HANDLE_FLAG_INHERIT, 0);
140 handles[1] = (jlong) outRead;
141 }
142 SetHandleInformation(si.hStdOutput,
143 HANDLE_FLAG_INHERIT,
144 HANDLE_FLAG_INHERIT);
145
146 if (redirectErrorStream) {
147 si.hStdError = si.hStdOutput;
148 handles[2] = (jlong) -1;
149 } else if (handles[2] != (jlong) -1) {
150 si.hStdError = (HANDLE) handles[2];
151 handles[2] = (jlong) -1;
152 } else {
153 if (! CreatePipe(&errRead, &errWrite, &sa, PIPE_SIZE)) {
154 win32Error(env, "CreatePipe");
155 goto Catch;
156 }
157 si.hStdError = errWrite;
158 SetHandleInformation(errRead, HANDLE_FLAG_INHERIT, 0);
159 handles[2] = (jlong) errRead;
160 }
161 SetHandleInformation(si.hStdError,
162 HANDLE_FLAG_INHERIT,
163 HANDLE_FLAG_INHERIT);
164
165 processFlag = CREATE_NO_WINDOW | CREATE_UNICODE_ENVIRONMENT;
166 ret = CreateProcessW(0, /* executable name */
167 (LPWSTR)pcmd, /* command line */
168 0, /* process security attribute */
169 0, /* thread security attribute */
170 TRUE, /* inherits system handles */
171 processFlag, /* selected based on exe type */
172 (LPVOID)penvBlock,/* environment block */
173 (LPCWSTR)pdir, /* change to the new current directory */
174 &si, /* (in) startup information */
175 &pi); /* (out) process information */
176 if (!ret) {
177 win32Error(env, "CreateProcess");
178 goto Catch;
179 }
180
181 CloseHandle(pi.hThread);
182 ret = (jlong)pi.hProcess;
183
184 Finally:
185 /* Always clean up the child's side of the pipes */
186 closeSafely(inRead);
187 closeSafely(outWrite);
188 closeSafely(errWrite);
189
190 if (pcmd != NULL)
191 (*env)->ReleaseStringChars(env, cmd, pcmd);
192 if (pdir != NULL)
193 (*env)->ReleaseStringChars(env, dir, pdir);
194 if (penvBlock != NULL)
195 (*env)->ReleaseStringChars(env, envBlock, penvBlock);
196 if (handles != NULL)
197 (*env)->ReleaseLongArrayElements(env, stdHandles, handles, 0);
198 return ret;
199
200 Catch:
201 /* Clean up the parent's side of the pipes in case of failure only */
202 closeSafely(inWrite);
203 closeSafely(outRead);
204 closeSafely(errRead);
205 goto Finally;
206 }
207
208 JNIEXPORT jint JNICALL
209 Java_java_lang_ProcessImpl_getExitCodeProcess(JNIEnv *env, jclass ignored, jlong handle)
210 {
211 DWORD exit_code;
212 if (GetExitCodeProcess((HANDLE) handle, &exit_code) == 0)
213 win32Error(env, "GetExitCodeProcess");
214 return exit_code;
215 }
216
217 JNIEXPORT jint JNICALL
218 Java_java_lang_ProcessImpl_getStillActive(JNIEnv *env, jclass ignored)
219 {
220 return STILL_ACTIVE;
221 }
222
223 JNIEXPORT void JNICALL
224 Java_java_lang_ProcessImpl_waitForInterruptibly(JNIEnv *env, jclass ignored, jlong handle)
225 {
226 HANDLE events[2];
227 events[0] = (HANDLE) handle;
228 events[1] = JVM_GetThreadInterruptEvent();
229
230 if (WaitForMultipleObjects(sizeof(events)/sizeof(events[0]), events,
231 FALSE, /* Wait for ANY event */
232 INFINITE) /* Wait forever */
233 == WAIT_FAILED)
234 win32Error(env, "WaitForMultipleObjects");
235 }
236
237 JNIEXPORT void JNICALL
238 Java_java_lang_ProcessImpl_waitForTimeoutInterruptibly(JNIEnv *env,
239 jclass ignored,
240 jlong handle,
241 jlong timeout)
242 {
243 HANDLE events[2];
244 DWORD dwTimeout = (DWORD)timeout;
245 DWORD result;
246 events[0] = (HANDLE) handle;
247 events[1] = JVM_GetThreadInterruptEvent();
248 result = WaitForMultipleObjects(sizeof(events)/sizeof(events[0]), events,
249 FALSE, /* Wait for ANY event */
250 dwTimeout); /* Wait for dwTimeout */
251
252 if (result == WAIT_FAILED)
253 win32Error(env, "WaitForMultipleObjects");
254 }
255
256 JNIEXPORT void JNICALL
257 Java_java_lang_ProcessImpl_terminateProcess(JNIEnv *env, jclass ignored, jlong handle)
258 {
259 TerminateProcess((HANDLE) handle, 1);
260 }
261
262 JNIEXPORT jboolean JNICALL
263 Java_java_lang_ProcessImpl_isProcessAlive(JNIEnv *env, jclass ignored, jlong handle)
264 {
265 DWORD dwExitStatus;
266 GetExitCodeProcess(handle, &dwExitStatus);
267 return dwExitStatus == STILL_ACTIVE;
268 }
269
270 JNIEXPORT jboolean JNICALL
271 Java_java_lang_ProcessImpl_closeHandle(JNIEnv *env, jclass ignored, jlong handle)
272 {
273 return CloseHandle((HANDLE) handle);
274 }
275
276 /**
277 * Returns a copy of the Unicode characters of a string. Fow now this
278 * function doesn't handle long path names and other issues.
279 */
280 static WCHAR* getPath(JNIEnv *env, jstring ps) {
281 WCHAR *pathbuf = NULL;
282 const jchar *chars = (*(env))->GetStringChars(env, ps, NULL);
283 if (chars != NULL) {
284 size_t pathlen = wcslen(chars);
285 pathbuf = (WCHAR*)malloc((pathlen + 6) * sizeof(WCHAR));
286 if (pathbuf == NULL) {
|
23 * questions.
24 */
25
26 #include <assert.h>
27 #include "java_lang_ProcessImpl.h"
28
29 #include "jni.h"
30 #include "jvm.h"
31 #include "jni_util.h"
32 #include "io_util.h"
33 #include <windows.h>
34 #include <io.h>
35
36 /* We try to make sure that we can read and write 4095 bytes (the
37 * fixed limit on Linux) to the pipe on all operating systems without
38 * deadlock. Windows 2000 inexplicably appears to need an extra 24
39 * bytes of slop to avoid deadlock.
40 */
41 #define PIPE_SIZE (4096+24)
42
43 /* We have THREE locales in action:
44 * 1. Thread default locale - dictates UNICODE-to-8bit conversion
45 * 2. System locale that defines the message localization
46 * 3. The file name locale
47 * Each locale could be an extended locale, that means that text cannot be
48 * mapped to 8bit sequence without multibyte encoding.
49 * VM is ready for that, if text is UTF-8.
50 * Here we make the work right from the beginning.
51 */
52
53 /* Unicode version of JVM call:
54 * hotspot/src/os/windows/vm/os_windows.cpp:
55 * size_t os::lasterror(char* buf, size_t len)
56 * JVM version need to be fixed accordingly as well as
57 * jdk/src/windows/native/java/io/io_util_md.c
58 * size_t getLastErrorString(char *buf, size_t len)
59 */
60 size_t os_lasterror(WCHAR* buf, size_t len) {
61 DWORD errval;
62 if ((errval = GetLastError()) != 0) {
63 /* DOS error*/
64 size_t n = (size_t)FormatMessageW(
65 FORMAT_MESSAGE_FROM_SYSTEM|FORMAT_MESSAGE_IGNORE_INSERTS,
66 NULL,
67 errval,
68 0,
69 buf,
70 (DWORD)len,
71 NULL);
72 if (n > 3) {
73 // Drop final '.', CR, LF
74 if (buf[n - 1] == L'\n') n--;
75 if (buf[n - 1] == L'\r') n--;
76 if (buf[n - 1] == L'.') n--;
77 buf[n] = L'\0';
78 }
79 return n;
80 }
81
82 if (errno != 0) {
83 /* C runtime error that has no corresponding DOS error code */
84 const WCHAR* s = _wcserror(errno);
85 size_t n = wcslen(s);
86 if (n >= len) n = len - 1;
87 wcsncpy(buf, s, n);
88 buf[n] = L'\0';
89 return n;
90 }
91
92 return 0;
93 }
94
95 #define MESAGE_LENGTH (256 + 100)
96 #define ARRAY_SIZE(x) (sizeof(x)/sizeof(*x))
97
98 static void
99 win32Error(JNIEnv *env, const WCHAR *functionName)
100 {
101 WCHAR utf16_OSErrorMsg[MESAGE_LENGTH - 100];
102 WCHAR utf16_javaMessage[MESAGE_LENGTH];
103 /*Good suggestion about 2-bytes-per-symbol in localized error reports*/
104 char utf8_javaMessage[MESAGE_LENGTH*2];
105 const int errnum = GetLastError();
106 const int n = os_lasterror(utf16_OSErrorMsg, ARRAY_SIZE(utf16_OSErrorMsg));
107 if (n > 0)
108 swprintf(utf16_javaMessage, MESAGE_LENGTH, L"%s error=%d, %s", functionName, errnum, utf16_OSErrorMsg);
109 else
110 swprintf(utf16_javaMessage, MESAGE_LENGTH, L"%s failed, error=%d", functionName, errnum);
111
112 WideCharToMultiByte(
113 CP_UTF8,
114 0,
115 utf16_javaMessage,
116 MESAGE_LENGTH,
117 utf8_javaMessage,
118 MESAGE_LENGTH*2,
119 NULL,
120 NULL);
121
122 /*no way to die*/
123 utf8_javaMessage[MESAGE_LENGTH*2 - 1] = '\0';
124 JNU_ThrowIOException(env, utf8_javaMessage);
125 }
126
127 static void
128 closeSafely(HANDLE handle)
129 {
130 if (handle != INVALID_HANDLE_VALUE)
131 CloseHandle(handle);
132 }
133
134 JNIEXPORT jlong JNICALL
135 Java_java_lang_ProcessImpl_create(JNIEnv *env, jclass ignored,
136 jstring cmd,
137 jstring envBlock,
138 jstring dir,
139 jlongArray stdHandles,
140 jboolean redirectErrorStream)
141 {
142 HANDLE inRead = INVALID_HANDLE_VALUE;
143 HANDLE inWrite = INVALID_HANDLE_VALUE;
144 HANDLE outRead = INVALID_HANDLE_VALUE;
167 penvBlock = ((*env)->GetStringChars(env, envBlock, NULL));
168 if (penvBlock == NULL) goto Catch;
169 }
170 assert(stdHandles != NULL);
171 handles = (*env)->GetLongArrayElements(env, stdHandles, NULL);
172 if (handles == NULL) goto Catch;
173
174 memset(&si, 0, sizeof(si));
175 si.cb = sizeof(si);
176 si.dwFlags = STARTF_USESTDHANDLES;
177
178 sa.nLength = sizeof(sa);
179 sa.lpSecurityDescriptor = 0;
180 sa.bInheritHandle = TRUE;
181
182 if (handles[0] != (jlong) -1) {
183 si.hStdInput = (HANDLE) handles[0];
184 handles[0] = (jlong) -1;
185 } else {
186 if (! CreatePipe(&inRead, &inWrite, &sa, PIPE_SIZE)) {
187 win32Error(env, L"CreatePipe");
188 goto Catch;
189 }
190 si.hStdInput = inRead;
191 SetHandleInformation(inWrite, HANDLE_FLAG_INHERIT, 0);
192 handles[0] = (jlong) inWrite;
193 }
194 SetHandleInformation(si.hStdInput,
195 HANDLE_FLAG_INHERIT,
196 HANDLE_FLAG_INHERIT);
197
198 if (handles[1] != (jlong) -1) {
199 si.hStdOutput = (HANDLE) handles[1];
200 handles[1] = (jlong) -1;
201 } else {
202 if (! CreatePipe(&outRead, &outWrite, &sa, PIPE_SIZE)) {
203 win32Error(env, L"CreatePipe");
204 goto Catch;
205 }
206 si.hStdOutput = outWrite;
207 SetHandleInformation(outRead, HANDLE_FLAG_INHERIT, 0);
208 handles[1] = (jlong) outRead;
209 }
210 SetHandleInformation(si.hStdOutput,
211 HANDLE_FLAG_INHERIT,
212 HANDLE_FLAG_INHERIT);
213
214 if (redirectErrorStream) {
215 si.hStdError = si.hStdOutput;
216 handles[2] = (jlong) -1;
217 } else if (handles[2] != (jlong) -1) {
218 si.hStdError = (HANDLE) handles[2];
219 handles[2] = (jlong) -1;
220 } else {
221 if (! CreatePipe(&errRead, &errWrite, &sa, PIPE_SIZE)) {
222 win32Error(env, L"CreatePipe");
223 goto Catch;
224 }
225 si.hStdError = errWrite;
226 SetHandleInformation(errRead, HANDLE_FLAG_INHERIT, 0);
227 handles[2] = (jlong) errRead;
228 }
229 SetHandleInformation(si.hStdError,
230 HANDLE_FLAG_INHERIT,
231 HANDLE_FLAG_INHERIT);
232
233 processFlag = CREATE_NO_WINDOW | CREATE_UNICODE_ENVIRONMENT;
234 ret = CreateProcessW(0, /* executable name */
235 (LPWSTR)pcmd, /* command line */
236 0, /* process security attribute */
237 0, /* thread security attribute */
238 TRUE, /* inherits system handles */
239 processFlag, /* selected based on exe type */
240 (LPVOID)penvBlock,/* environment block */
241 (LPCWSTR)pdir, /* change to the new current directory */
242 &si, /* (in) startup information */
243 &pi); /* (out) process information */
244 if (!ret) {
245 win32Error(env, L"CreateProcess");
246 goto Catch;
247 }
248
249 CloseHandle(pi.hThread);
250 ret = (jlong)pi.hProcess;
251
252 Finally:
253 /* Always clean up the child's side of the pipes */
254 closeSafely(inRead);
255 closeSafely(outWrite);
256 closeSafely(errWrite);
257
258 if (pcmd != NULL)
259 (*env)->ReleaseStringChars(env, cmd, pcmd);
260 if (pdir != NULL)
261 (*env)->ReleaseStringChars(env, dir, pdir);
262 if (penvBlock != NULL)
263 (*env)->ReleaseStringChars(env, envBlock, penvBlock);
264 if (handles != NULL)
265 (*env)->ReleaseLongArrayElements(env, stdHandles, handles, 0);
266 return ret;
267
268 Catch:
269 /* Clean up the parent's side of the pipes in case of failure only */
270 closeSafely(inWrite);
271 closeSafely(outRead);
272 closeSafely(errRead);
273 goto Finally;
274 }
275
276 JNIEXPORT jint JNICALL
277 Java_java_lang_ProcessImpl_getExitCodeProcess(JNIEnv *env, jclass ignored, jlong handle)
278 {
279 DWORD exit_code;
280 if (GetExitCodeProcess((HANDLE) handle, &exit_code) == 0)
281 win32Error(env, L"GetExitCodeProcess");
282 return exit_code;
283 }
284
285 JNIEXPORT jint JNICALL
286 Java_java_lang_ProcessImpl_getStillActive(JNIEnv *env, jclass ignored)
287 {
288 return STILL_ACTIVE;
289 }
290
291 JNIEXPORT void JNICALL
292 Java_java_lang_ProcessImpl_waitForInterruptibly(JNIEnv *env, jclass ignored, jlong handle)
293 {
294 HANDLE events[2];
295 events[0] = (HANDLE) handle;
296 events[1] = JVM_GetThreadInterruptEvent();
297
298 if (WaitForMultipleObjects(sizeof(events)/sizeof(events[0]), events,
299 FALSE, /* Wait for ANY event */
300 INFINITE) /* Wait forever */
301 == WAIT_FAILED)
302 win32Error(env, L"WaitForMultipleObjects");
303 }
304
305 JNIEXPORT void JNICALL
306 Java_java_lang_ProcessImpl_waitForTimeoutInterruptibly(JNIEnv *env,
307 jclass ignored,
308 jlong handle,
309 jlong timeout)
310 {
311 HANDLE events[2];
312 DWORD dwTimeout = (DWORD)timeout;
313 DWORD result;
314 events[0] = (HANDLE) handle;
315 events[1] = JVM_GetThreadInterruptEvent();
316 result = WaitForMultipleObjects(sizeof(events)/sizeof(events[0]), events,
317 FALSE, /* Wait for ANY event */
318 dwTimeout); /* Wait for dwTimeout */
319
320 if (result == WAIT_FAILED)
321 win32Error(env, L"WaitForMultipleObjects");
322 }
323
324 JNIEXPORT void JNICALL
325 Java_java_lang_ProcessImpl_terminateProcess(JNIEnv *env, jclass ignored, jlong handle)
326 {
327 TerminateProcess((HANDLE) handle, 1);
328 }
329
330 JNIEXPORT jboolean JNICALL
331 Java_java_lang_ProcessImpl_isProcessAlive(JNIEnv *env, jclass ignored, jlong handle)
332 {
333 DWORD dwExitStatus;
334 GetExitCodeProcess((HANDLE) handle, &dwExitStatus);
335 return dwExitStatus == STILL_ACTIVE;
336 }
337
338 JNIEXPORT jboolean JNICALL
339 Java_java_lang_ProcessImpl_closeHandle(JNIEnv *env, jclass ignored, jlong handle)
340 {
341 return CloseHandle((HANDLE) handle);
342 }
343
344 /**
345 * Returns a copy of the Unicode characters of a string. Fow now this
346 * function doesn't handle long path names and other issues.
347 */
348 static WCHAR* getPath(JNIEnv *env, jstring ps) {
349 WCHAR *pathbuf = NULL;
350 const jchar *chars = (*(env))->GetStringChars(env, ps, NULL);
351 if (chars != NULL) {
352 size_t pathlen = wcslen(chars);
353 pathbuf = (WCHAR*)malloc((pathlen + 6) * sizeof(WCHAR));
354 if (pathbuf == NULL) {
|