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annotate src/os/solaris/vm/attachListener_solaris.cpp @ 6005:c263e0e9f14b
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author | dcubed |
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date | Sun, 15 Apr 2012 15:37:20 -0700 |
parents | f95d63e2154a |
children | 973046802b6f |
rev | line source |
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0 | 1 /* |
1972 | 2 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. |
0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #include "precompiled.hpp" |
26 #include "runtime/interfaceSupport.hpp" | |
27 #include "runtime/os.hpp" | |
28 #include "services/attachListener.hpp" | |
29 #include "services/dtraceAttacher.hpp" | |
0 | 30 |
31 #include <door.h> | |
32 #include <string.h> | |
33 #include <signal.h> | |
34 #include <sys/types.h> | |
35 #include <sys/socket.h> | |
36 #include <sys/stat.h> | |
37 | |
38 // stropts.h uses STR in stream ioctl defines | |
39 #undef STR | |
40 #include <stropts.h> | |
41 #undef STR | |
42 #define STR(a) #a | |
43 | |
44 // The attach mechanism on Solaris is implemented using the Doors IPC | |
45 // mechanism. The first tool to attempt to attach causes the attach | |
46 // listener thread to startup. This thread creats a door that is | |
47 // associated with a function that enqueues an operation to the attach | |
48 // listener. The door is attached to a file in the file system so that | |
49 // client (tools) can locate it. To enqueue an operation to the VM the | |
50 // client calls through the door which invokes the enqueue function in | |
51 // this process. The credentials of the client are checked and if the | |
52 // effective uid matches this process then the operation is enqueued. | |
53 // When an operation completes the attach listener is required to send the | |
54 // operation result and any result data to the client. In this implementation | |
55 // the result is returned via a UNIX domain socket. A pair of connected | |
56 // sockets (socketpair) is created in the enqueue function and the file | |
57 // descriptor for one of the sockets is returned to the client as the | |
58 // return from the door call. The other end is retained in this process. | |
59 // When the operation completes the result is sent to the client and | |
60 // the socket is closed. | |
61 | |
62 // forward reference | |
63 class SolarisAttachOperation; | |
64 | |
65 class SolarisAttachListener: AllStatic { | |
66 private: | |
67 | |
68 // the path to which we attach the door file descriptor | |
69 static char _door_path[PATH_MAX+1]; | |
70 static volatile bool _has_door_path; | |
71 | |
72 // door descriptor returned by door_create | |
73 static int _door_descriptor; | |
74 | |
75 static void set_door_path(char* path) { | |
76 if (path == NULL) { | |
77 _has_door_path = false; | |
78 } else { | |
79 strncpy(_door_path, path, PATH_MAX); | |
80 _door_path[PATH_MAX] = '\0'; // ensure it's nul terminated | |
81 _has_door_path = true; | |
82 } | |
83 } | |
84 | |
85 static void set_door_descriptor(int dd) { _door_descriptor = dd; } | |
86 | |
87 // mutex to protect operation list | |
88 static mutex_t _mutex; | |
89 | |
90 // semaphore to wakeup listener thread | |
91 static sema_t _wakeup; | |
92 | |
93 static mutex_t* mutex() { return &_mutex; } | |
94 static sema_t* wakeup() { return &_wakeup; } | |
95 | |
96 // enqueued operation list | |
97 static SolarisAttachOperation* _head; | |
98 static SolarisAttachOperation* _tail; | |
99 | |
100 static SolarisAttachOperation* head() { return _head; } | |
101 static void set_head(SolarisAttachOperation* head) { _head = head; } | |
102 | |
103 static SolarisAttachOperation* tail() { return _tail; } | |
104 static void set_tail(SolarisAttachOperation* tail) { _tail = tail; } | |
105 | |
106 // create the door | |
107 static int create_door(); | |
108 | |
109 public: | |
110 enum { | |
111 ATTACH_PROTOCOL_VER = 1 // protocol version | |
112 }; | |
113 enum { | |
114 ATTACH_ERROR_BADREQUEST = 100, // error code returned by | |
115 ATTACH_ERROR_BADVERSION = 101, // the door call | |
116 ATTACH_ERROR_RESOURCE = 102, | |
117 ATTACH_ERROR_INTERNAL = 103, | |
118 ATTACH_ERROR_DENIED = 104 | |
119 }; | |
120 | |
121 // initialize the listener | |
122 static int init(); | |
123 | |
124 static bool has_door_path() { return _has_door_path; } | |
125 static char* door_path() { return _door_path; } | |
126 static int door_descriptor() { return _door_descriptor; } | |
127 | |
128 // enqueue an operation | |
129 static void enqueue(SolarisAttachOperation* op); | |
130 | |
131 // dequeue an operation | |
132 static SolarisAttachOperation* dequeue(); | |
133 }; | |
134 | |
135 | |
136 // SolarisAttachOperation is an AttachOperation that additionally encapsulates | |
137 // a socket connection to the requesting client/tool. SolarisAttachOperation | |
138 // can additionally be held in a linked list. | |
139 | |
140 class SolarisAttachOperation: public AttachOperation { | |
141 private: | |
142 friend class SolarisAttachListener; | |
143 | |
144 // connection to client | |
145 int _socket; | |
146 | |
147 // linked list support | |
148 SolarisAttachOperation* _next; | |
149 | |
150 SolarisAttachOperation* next() { return _next; } | |
151 void set_next(SolarisAttachOperation* next) { _next = next; } | |
152 | |
153 public: | |
154 void complete(jint res, bufferedStream* st); | |
155 | |
156 int socket() const { return _socket; } | |
157 void set_socket(int s) { _socket = s; } | |
158 | |
159 SolarisAttachOperation(char* name) : AttachOperation(name) { | |
160 set_socket(-1); | |
161 set_next(NULL); | |
162 } | |
163 }; | |
164 | |
165 // statics | |
166 char SolarisAttachListener::_door_path[PATH_MAX+1]; | |
167 volatile bool SolarisAttachListener::_has_door_path; | |
168 int SolarisAttachListener::_door_descriptor = -1; | |
169 mutex_t SolarisAttachListener::_mutex; | |
170 sema_t SolarisAttachListener::_wakeup; | |
171 SolarisAttachOperation* SolarisAttachListener::_head = NULL; | |
172 SolarisAttachOperation* SolarisAttachListener::_tail = NULL; | |
173 | |
174 // Supporting class to help split a buffer into individual components | |
175 class ArgumentIterator : public StackObj { | |
176 private: | |
177 char* _pos; | |
178 char* _end; | |
179 public: | |
180 ArgumentIterator(char* arg_buffer, size_t arg_size) { | |
181 _pos = arg_buffer; | |
182 _end = _pos + arg_size - 1; | |
183 } | |
184 char* next() { | |
185 if (*_pos == '\0') { | |
186 return NULL; | |
187 } | |
188 char* res = _pos; | |
189 char* next_pos = strchr(_pos, '\0'); | |
190 if (next_pos < _end) { | |
191 next_pos++; | |
192 } | |
193 _pos = next_pos; | |
194 return res; | |
195 } | |
196 }; | |
197 | |
198 // Calls from the door function to check that the client credentials | |
199 // match this process. Returns 0 if credentials okay, otherwise -1. | |
200 static int check_credentials() { | |
201 door_cred_t cred_info; | |
202 | |
203 // get client credentials | |
204 if (door_cred(&cred_info) == -1) { | |
205 return -1; // unable to get them | |
206 } | |
207 | |
208 // get our euid/eguid (probably could cache these) | |
209 uid_t euid = geteuid(); | |
210 gid_t egid = getegid(); | |
211 | |
212 // check that the effective uid/gid matches - discuss this with Jeff. | |
213 if (cred_info.dc_euid == euid && cred_info.dc_egid == egid) { | |
214 return 0; // okay | |
215 } else { | |
216 return -1; // denied | |
217 } | |
218 } | |
219 | |
220 | |
221 // Parses the argument buffer to create an AttachOperation that we should | |
222 // enqueue to the attach listener. | |
223 // The buffer is expected to be formatted as follows: | |
224 // <ver>0<cmd>0<arg>0<arg>0<arg>0 | |
225 // where <ver> is the version number (must be "1"), <cmd> is the command | |
226 // name ("load, "datadump", ...) and <arg> is an argument. | |
227 // | |
228 static SolarisAttachOperation* create_operation(char* argp, size_t arg_size, int* err) { | |
229 // assume bad request until parsed | |
230 *err = SolarisAttachListener::ATTACH_ERROR_BADREQUEST; | |
231 | |
232 if (arg_size < 2 || argp[arg_size-1] != '\0') { | |
233 return NULL; // no ver or not null terminated | |
234 } | |
235 | |
236 // Use supporting class to iterate over the buffer | |
237 ArgumentIterator args(argp, arg_size); | |
238 | |
239 // First check the protocol version | |
240 char* ver = args.next(); | |
241 if (ver == NULL) { | |
242 return NULL; | |
243 } | |
244 if (atoi(ver) != SolarisAttachListener::ATTACH_PROTOCOL_VER) { | |
245 *err = SolarisAttachListener::ATTACH_ERROR_BADVERSION; | |
246 return NULL; | |
247 } | |
248 | |
249 // Get command name and create the operation | |
250 char* name = args.next(); | |
251 if (name == NULL || strlen(name) > AttachOperation::name_length_max) { | |
252 return NULL; | |
253 } | |
254 SolarisAttachOperation* op = new SolarisAttachOperation(name); | |
255 | |
256 // Iterate over the arguments | |
257 for (int i=0; i<AttachOperation::arg_count_max; i++) { | |
258 char* arg = args.next(); | |
259 if (arg == NULL) { | |
260 op->set_arg(i, NULL); | |
261 } else { | |
262 if (strlen(arg) > AttachOperation::arg_length_max) { | |
263 delete op; | |
264 return NULL; | |
265 } | |
266 op->set_arg(i, arg); | |
267 } | |
268 } | |
269 | |
270 // return operation | |
271 *err = 0; | |
272 return op; | |
273 } | |
274 | |
275 // create special operation to indicate all clients have detached | |
276 static SolarisAttachOperation* create_detachall_operation() { | |
277 return new SolarisAttachOperation(AttachOperation::detachall_operation_name()); | |
278 } | |
279 | |
280 // This is door function which the client executes via a door_call. | |
281 extern "C" { | |
282 static void enqueue_proc(void* cookie, char* argp, size_t arg_size, | |
283 door_desc_t* dt, uint_t n_desc) | |
284 { | |
285 int return_fd = -1; | |
286 SolarisAttachOperation* op = NULL; | |
287 | |
288 // no listener | |
289 jint res = 0; | |
290 if (!AttachListener::is_initialized()) { | |
291 // how did we get here? | |
292 debug_only(warning("door_call when not enabled")); | |
293 res = (jint)SolarisAttachListener::ATTACH_ERROR_INTERNAL; | |
294 } | |
295 | |
296 // check client credentials | |
297 if (res == 0) { | |
298 if (check_credentials() != 0) { | |
299 res = (jint)SolarisAttachListener::ATTACH_ERROR_DENIED; | |
300 } | |
301 } | |
302 | |
303 // if we are stopped at ShowMessageBoxOnError then maybe we can | |
304 // load a diagnostic library | |
305 if (res == 0 && is_error_reported()) { | |
306 if (ShowMessageBoxOnError) { | |
307 // TBD - support loading of diagnostic library here | |
308 } | |
309 | |
310 // can't enqueue operation after fatal error | |
311 res = (jint)SolarisAttachListener::ATTACH_ERROR_RESOURCE; | |
312 } | |
313 | |
314 // create the operation | |
315 if (res == 0) { | |
316 int err; | |
317 op = create_operation(argp, arg_size, &err); | |
318 res = (op == NULL) ? (jint)err : 0; | |
319 } | |
320 | |
321 // create a pair of connected sockets. Store the file descriptor | |
322 // for one end in the operation and enqueue the operation. The | |
323 // file descriptor for the other end wil be returned to the client. | |
324 if (res == 0) { | |
325 int s[2]; | |
326 if (socketpair(PF_UNIX, SOCK_STREAM, 0, s) < 0) { | |
327 delete op; | |
328 res = (jint)SolarisAttachListener::ATTACH_ERROR_RESOURCE; | |
329 } else { | |
330 op->set_socket(s[0]); | |
331 return_fd = s[1]; | |
332 SolarisAttachListener::enqueue(op); | |
333 } | |
334 } | |
335 | |
336 // Return 0 (success) + file descriptor, or non-0 (error) | |
337 if (res == 0) { | |
338 door_desc_t desc; | |
339 desc.d_attributes = DOOR_DESCRIPTOR; | |
340 desc.d_data.d_desc.d_descriptor = return_fd; | |
341 door_return((char*)&res, sizeof(res), &desc, 1); | |
342 } else { | |
343 door_return((char*)&res, sizeof(res), NULL, 0); | |
344 } | |
345 } | |
346 } | |
347 | |
348 // atexit hook to detach the door and remove the file | |
349 extern "C" { | |
350 static void listener_cleanup() { | |
351 static int cleanup_done; | |
352 if (!cleanup_done) { | |
353 cleanup_done = 1; | |
354 int dd = SolarisAttachListener::door_descriptor(); | |
355 if (dd >= 0) { | |
356 ::close(dd); | |
357 } | |
358 if (SolarisAttachListener::has_door_path()) { | |
359 char* path = SolarisAttachListener::door_path(); | |
360 ::fdetach(path); | |
361 ::unlink(path); | |
362 } | |
363 } | |
364 } | |
365 } | |
366 | |
367 // Create the door | |
368 int SolarisAttachListener::create_door() { | |
369 char door_path[PATH_MAX+1]; | |
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370 char initial_path[PATH_MAX+1]; |
0 | 371 int fd, res; |
372 | |
373 // register exit function | |
374 ::atexit(listener_cleanup); | |
375 | |
376 // create the door descriptor | |
377 int dd = ::door_create(enqueue_proc, NULL, 0); | |
378 if (dd < 0) { | |
379 return -1; | |
380 } | |
381 | |
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382 // create initial file to attach door descriptor |
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383 snprintf(door_path, sizeof(door_path), "%s/.java_pid%d", |
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384 os::get_temp_directory(), os::current_process_id()); |
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385 snprintf(initial_path, sizeof(initial_path), "%s.tmp", door_path); |
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386 RESTARTABLE(::creat(initial_path, S_IRUSR | S_IWUSR), fd); |
0 | 387 if (fd == -1) { |
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388 debug_only(warning("attempt to create %s failed", initial_path)); |
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389 ::door_revoke(dd); |
0 | 390 return -1; |
391 } | |
392 assert(fd >= 0, "bad file descriptor"); | |
393 RESTARTABLE(::close(fd), res); | |
394 | |
395 // attach the door descriptor to the file | |
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396 if ((res = ::fattach(dd, initial_path)) == -1) { |
0 | 397 // if busy then detach and try again |
398 if (errno == EBUSY) { | |
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399 ::fdetach(initial_path); |
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400 res = ::fattach(dd, initial_path); |
0 | 401 } |
402 if (res == -1) { | |
403 ::door_revoke(dd); | |
404 dd = -1; | |
405 } | |
406 } | |
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407 |
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408 // rename file so that clients can attach |
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409 if (dd >= 0) { |
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410 if (::rename(initial_path, door_path) == -1) { |
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411 RESTARTABLE(::close(dd), res); |
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412 ::fdetach(initial_path); |
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413 dd = -1; |
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414 } |
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415 } |
0 | 416 if (dd >= 0) { |
417 set_door_descriptor(dd); | |
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418 set_door_path(door_path); |
0 | 419 } else { |
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420 // unable to create door, attach it to file, or rename file into place |
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421 ::unlink(initial_path); |
0 | 422 return -1; |
423 } | |
424 | |
425 return 0; | |
426 } | |
427 | |
428 // Initialization - create the door, locks, and other initialization | |
429 int SolarisAttachListener::init() { | |
430 if (create_door()) { | |
431 return -1; | |
432 } | |
433 | |
434 int status = os::Solaris::mutex_init(&_mutex); | |
435 assert_status(status==0, status, "mutex_init"); | |
436 | |
437 status = ::sema_init(&_wakeup, 0, NULL, NULL); | |
438 assert_status(status==0, status, "sema_init"); | |
439 | |
440 set_head(NULL); | |
441 set_tail(NULL); | |
442 | |
443 return 0; | |
444 } | |
445 | |
446 // Dequeue an operation | |
447 SolarisAttachOperation* SolarisAttachListener::dequeue() { | |
448 for (;;) { | |
449 int res; | |
450 | |
451 // wait for somebody to enqueue something | |
452 while ((res = ::sema_wait(wakeup())) == EINTR) | |
453 ; | |
454 if (res) { | |
455 warning("sema_wait failed: %s", strerror(res)); | |
456 return NULL; | |
457 } | |
458 | |
459 // lock the list | |
460 res = os::Solaris::mutex_lock(mutex()); | |
461 assert(res == 0, "mutex_lock failed"); | |
462 | |
463 // remove the head of the list | |
464 SolarisAttachOperation* op = head(); | |
465 if (op != NULL) { | |
466 set_head(op->next()); | |
467 if (head() == NULL) { | |
468 set_tail(NULL); | |
469 } | |
470 } | |
471 | |
472 // unlock | |
473 os::Solaris::mutex_unlock(mutex()); | |
474 | |
475 // if we got an operation when return it. | |
476 if (op != NULL) { | |
477 return op; | |
478 } | |
479 } | |
480 } | |
481 | |
482 // Enqueue an operation | |
483 void SolarisAttachListener::enqueue(SolarisAttachOperation* op) { | |
484 // lock list | |
485 int res = os::Solaris::mutex_lock(mutex()); | |
486 assert(res == 0, "mutex_lock failed"); | |
487 | |
488 // enqueue at tail | |
489 op->set_next(NULL); | |
490 if (head() == NULL) { | |
491 set_head(op); | |
492 } else { | |
493 tail()->set_next(op); | |
494 } | |
495 set_tail(op); | |
496 | |
497 // wakeup the attach listener | |
498 RESTARTABLE(::sema_post(wakeup()), res); | |
499 assert(res == 0, "sema_post failed"); | |
500 | |
501 // unlock | |
502 os::Solaris::mutex_unlock(mutex()); | |
503 } | |
504 | |
505 | |
506 // support function - writes the (entire) buffer to a socket | |
507 static int write_fully(int s, char* buf, int len) { | |
508 do { | |
509 int n = ::write(s, buf, len); | |
510 if (n == -1) { | |
511 if (errno != EINTR) return -1; | |
512 } else { | |
513 buf += n; | |
514 len -= n; | |
515 } | |
516 } | |
517 while (len > 0); | |
518 return 0; | |
519 } | |
520 | |
521 // Complete an operation by sending the operation result and any result | |
522 // output to the client. At this time the socket is in blocking mode so | |
523 // potentially we can block if there is a lot of data and the client is | |
524 // non-responsive. For most operations this is a non-issue because the | |
525 // default send buffer is sufficient to buffer everything. In the future | |
526 // if there are operations that involves a very big reply then it the | |
527 // socket could be made non-blocking and a timeout could be used. | |
528 | |
529 void SolarisAttachOperation::complete(jint res, bufferedStream* st) { | |
530 if (this->socket() >= 0) { | |
531 JavaThread* thread = JavaThread::current(); | |
532 ThreadBlockInVM tbivm(thread); | |
533 | |
534 thread->set_suspend_equivalent(); | |
535 // cleared by handle_special_suspend_equivalent_condition() or | |
536 // java_suspend_self() via check_and_wait_while_suspended() | |
537 | |
538 // write operation result | |
539 char msg[32]; | |
540 sprintf(msg, "%d\n", res); | |
541 int rc = write_fully(this->socket(), msg, strlen(msg)); | |
542 | |
543 // write any result data | |
544 if (rc == 0) { | |
545 write_fully(this->socket(), (char*) st->base(), st->size()); | |
546 ::shutdown(this->socket(), 2); | |
547 } | |
548 | |
549 // close socket and we're done | |
550 RESTARTABLE(::close(this->socket()), rc); | |
551 | |
552 // were we externally suspended while we were waiting? | |
553 thread->check_and_wait_while_suspended(); | |
554 } | |
555 delete this; | |
556 } | |
557 | |
558 | |
559 // AttachListener functions | |
560 | |
561 AttachOperation* AttachListener::dequeue() { | |
562 JavaThread* thread = JavaThread::current(); | |
563 ThreadBlockInVM tbivm(thread); | |
564 | |
565 thread->set_suspend_equivalent(); | |
566 // cleared by handle_special_suspend_equivalent_condition() or | |
567 // java_suspend_self() via check_and_wait_while_suspended() | |
568 | |
569 AttachOperation* op = SolarisAttachListener::dequeue(); | |
570 | |
571 // were we externally suspended while we were waiting? | |
572 thread->check_and_wait_while_suspended(); | |
573 | |
574 return op; | |
575 } | |
576 | |
577 int AttachListener::pd_init() { | |
578 JavaThread* thread = JavaThread::current(); | |
579 ThreadBlockInVM tbivm(thread); | |
580 | |
581 thread->set_suspend_equivalent(); | |
582 // cleared by handle_special_suspend_equivalent_condition() or | |
583 // java_suspend_self() | |
584 | |
585 int ret_code = SolarisAttachListener::init(); | |
586 | |
587 // were we externally suspended while we were waiting? | |
588 thread->check_and_wait_while_suspended(); | |
589 | |
590 return ret_code; | |
591 } | |
592 | |
593 // Attach Listener is started lazily except in the case when | |
594 // +ReduseSignalUsage is used | |
595 bool AttachListener::init_at_startup() { | |
596 if (ReduceSignalUsage) { | |
597 return true; | |
598 } else { | |
599 return false; | |
600 } | |
601 } | |
602 | |
603 // If the file .attach_pid<pid> exists in the working directory | |
604 // or /tmp then this is the trigger to start the attach mechanism | |
605 bool AttachListener::is_init_trigger() { | |
606 if (init_at_startup() || is_initialized()) { | |
607 return false; // initialized at startup or already initialized | |
608 } | |
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609 char fn[PATH_MAX+1]; |
0 | 610 sprintf(fn, ".attach_pid%d", os::current_process_id()); |
611 int ret; | |
612 struct stat64 st; | |
613 RESTARTABLE(::stat64(fn, &st), ret); | |
614 if (ret == -1) { | |
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615 snprintf(fn, sizeof(fn), "%s/.attach_pid%d", |
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616 os::get_temp_directory(), os::current_process_id()); |
0 | 617 RESTARTABLE(::stat64(fn, &st), ret); |
618 } | |
619 if (ret == 0) { | |
620 // simple check to avoid starting the attach mechanism when | |
621 // a bogus user creates the file | |
622 if (st.st_uid == geteuid()) { | |
623 init(); | |
624 return true; | |
625 } | |
626 } | |
627 return false; | |
628 } | |
629 | |
630 // if VM aborts then detach/cleanup | |
631 void AttachListener::abort() { | |
632 listener_cleanup(); | |
633 } | |
634 | |
635 void AttachListener::pd_data_dump() { | |
636 os::signal_notify(SIGQUIT); | |
637 } | |
638 | |
639 static jint enable_dprobes(AttachOperation* op, outputStream* out) { | |
640 const char* probe = op->arg(0); | |
641 if (probe == NULL || probe[0] == '\0') { | |
642 out->print_cr("No probe specified"); | |
643 return JNI_ERR; | |
644 } else { | |
645 int probe_typess = atoi(probe); | |
646 if (errno) { | |
647 out->print_cr("invalid probe type"); | |
648 return JNI_ERR; | |
649 } else { | |
650 DTrace::enable_dprobes(probe_typess); | |
651 return JNI_OK; | |
652 } | |
653 } | |
654 } | |
655 | |
656 // platform specific operations table | |
657 static AttachOperationFunctionInfo funcs[] = { | |
658 { "enabledprobes", enable_dprobes }, | |
659 { NULL, NULL } | |
660 }; | |
661 | |
662 AttachOperationFunctionInfo* AttachListener::pd_find_operation(const char* name) { | |
663 int i; | |
664 for (i = 0; funcs[i].name != NULL; i++) { | |
665 if (strcmp(funcs[i].name, name) == 0) { | |
666 return &funcs[i]; | |
667 } | |
668 } | |
669 return NULL; | |
670 } | |
671 | |
672 // Solaris specific global flag set. Currently, we support only | |
673 // changing ExtendedDTraceProbes flag. | |
674 jint AttachListener::pd_set_flag(AttachOperation* op, outputStream* out) { | |
675 const char* name = op->arg(0); | |
676 assert(name != NULL, "flag name should not be null"); | |
677 bool flag = true; | |
678 const char* arg1; | |
679 if ((arg1 = op->arg(1)) != NULL) { | |
680 flag = (atoi(arg1) != 0); | |
681 if (errno) { | |
682 out->print_cr("flag value has to be an integer"); | |
683 return JNI_ERR; | |
684 } | |
685 } | |
686 | |
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687 if (strcmp(name, "ExtendedDTraceProbes") == 0) { |
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688 DTrace::set_extended_dprobes(flag); |
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689 return JNI_OK; |
0 | 690 } |
691 | |
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692 if (strcmp(name, "DTraceMonitorProbes") == 0) { |
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693 DTrace::set_monitor_dprobes(flag); |
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694 return JNI_OK; |
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695 } |
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696 |
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697 out->print_cr("flag '%s' cannot be changed", name); |
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698 return JNI_ERR; |
0 | 699 } |
700 | |
701 void AttachListener::pd_detachall() { | |
702 DTrace::detach_all_clients(); | |
703 } |