Mercurial > hg > truffle
annotate src/share/vm/services/attachListener.cpp @ 4058:59e515ee9354
7059047: EA: can't find initializing store with several CheckCastPP
Summary: Split adjust_escape_state() method into two methods to find initializing stores.
Reviewed-by: never
author | kvn |
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date | Mon, 07 Nov 2011 14:33:57 -0800 |
parents | 1d1603768966 |
children | 3b688d6ff3d0 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 2005, 2011, 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 "classfile/javaClasses.hpp" | |
27 #include "classfile/systemDictionary.hpp" | |
28 #include "gc_implementation/shared/vmGCOperations.hpp" | |
29 #include "memory/resourceArea.hpp" | |
30 #include "prims/jvmtiExport.hpp" | |
31 #include "runtime/arguments.hpp" | |
32 #include "runtime/globals.hpp" | |
33 #include "runtime/java.hpp" | |
34 #include "runtime/javaCalls.hpp" | |
35 #include "runtime/os.hpp" | |
36 #include "services/attachListener.hpp" | |
37 #include "services/heapDumper.hpp" | |
0 | 38 |
39 volatile bool AttachListener::_initialized; | |
40 | |
41 // Implementation of "properties" command. | |
42 // | |
43 // Invokes sun.misc.VMSupport.serializePropertiesToByteArray to serialize | |
44 // the system properties into a byte array. | |
45 | |
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46 static klassOop load_and_initialize_klass(Symbol* sh, TRAPS) { |
0 | 47 klassOop k = SystemDictionary::resolve_or_fail(sh, true, CHECK_NULL); |
48 instanceKlassHandle ik (THREAD, k); | |
49 if (ik->should_be_initialized()) { | |
50 ik->initialize(CHECK_NULL); | |
51 } | |
52 return ik(); | |
53 } | |
54 | |
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55 static jint get_properties(AttachOperation* op, outputStream* out, Symbol* serializePropertiesMethod) { |
0 | 56 Thread* THREAD = Thread::current(); |
57 HandleMark hm; | |
58 | |
59 // load sun.misc.VMSupport | |
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60 Symbol* klass = vmSymbols::sun_misc_VMSupport(); |
0 | 61 klassOop k = load_and_initialize_klass(klass, THREAD); |
62 if (HAS_PENDING_EXCEPTION) { | |
63 java_lang_Throwable::print(PENDING_EXCEPTION, out); | |
64 CLEAR_PENDING_EXCEPTION; | |
65 return JNI_ERR; | |
66 } | |
67 instanceKlassHandle ik(THREAD, k); | |
68 | |
69 // invoke the serializePropertiesToByteArray method | |
70 JavaValue result(T_OBJECT); | |
71 JavaCallArguments args; | |
72 | |
73 | |
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74 Symbol* signature = vmSymbols::serializePropertiesToByteArray_signature(); |
0 | 75 JavaCalls::call_static(&result, |
76 ik, | |
77 serializePropertiesMethod, | |
78 signature, | |
79 &args, | |
80 THREAD); | |
81 if (HAS_PENDING_EXCEPTION) { | |
82 java_lang_Throwable::print(PENDING_EXCEPTION, out); | |
83 CLEAR_PENDING_EXCEPTION; | |
84 return JNI_ERR; | |
85 } | |
86 | |
87 // The result should be a [B | |
88 oop res = (oop)result.get_jobject(); | |
89 assert(res->is_typeArray(), "just checking"); | |
90 assert(typeArrayKlass::cast(res->klass())->element_type() == T_BYTE, "just checking"); | |
91 | |
92 // copy the bytes to the output stream | |
93 typeArrayOop ba = typeArrayOop(res); | |
94 jbyte* addr = typeArrayOop(res)->byte_at_addr(0); | |
95 out->print_raw((const char*)addr, ba->length()); | |
96 | |
97 return JNI_OK; | |
98 } | |
99 | |
100 // Implementation of "properties" command. | |
101 static jint get_system_properties(AttachOperation* op, outputStream* out) { | |
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102 return get_properties(op, out, vmSymbols::serializePropertiesToByteArray_name()); |
0 | 103 } |
104 | |
105 // Implementation of "agent_properties" command. | |
106 static jint get_agent_properties(AttachOperation* op, outputStream* out) { | |
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107 return get_properties(op, out, vmSymbols::serializeAgentPropertiesToByteArray_name()); |
0 | 108 } |
109 | |
110 // Implementation of "datadump" command. | |
111 // | |
112 // Raises a SIGBREAK signal so that VM dump threads, does deadlock detection, | |
113 // etc. In theory this command should only post a DataDumpRequest to any | |
114 // JVMTI environment that has enabled this event. However it's useful to | |
115 // trigger the SIGBREAK handler. | |
116 | |
117 static jint data_dump(AttachOperation* op, outputStream* out) { | |
118 if (!ReduceSignalUsage) { | |
119 AttachListener::pd_data_dump(); | |
120 } else { | |
121 if (JvmtiExport::should_post_data_dump()) { | |
122 JvmtiExport::post_data_dump(); | |
123 } | |
124 } | |
125 return JNI_OK; | |
126 } | |
127 | |
128 // Implementation of "threaddump" command - essentially a remote ctrl-break | |
129 // | |
130 static jint thread_dump(AttachOperation* op, outputStream* out) { | |
131 bool print_concurrent_locks = false; | |
132 if (op->arg(0) != NULL && strcmp(op->arg(0), "-l") == 0) { | |
133 print_concurrent_locks = true; | |
134 } | |
135 | |
136 // thread stacks | |
137 VM_PrintThreads op1(out, print_concurrent_locks); | |
138 VMThread::execute(&op1); | |
139 | |
140 // JNI global handles | |
141 VM_PrintJNI op2(out); | |
142 VMThread::execute(&op2); | |
143 | |
144 // Deadlock detection | |
145 VM_FindDeadlocks op3(out); | |
146 VMThread::execute(&op3); | |
147 | |
148 return JNI_OK; | |
149 } | |
150 | |
151 #ifndef SERVICES_KERNEL // Heap dumping not supported | |
152 // Implementation of "dumpheap" command. | |
153 // | |
154 // Input arguments :- | |
155 // arg0: Name of the dump file | |
156 // arg1: "-live" or "-all" | |
157 jint dump_heap(AttachOperation* op, outputStream* out) { | |
158 const char* path = op->arg(0); | |
159 if (path == NULL || path[0] == '\0') { | |
160 out->print_cr("No dump file specified"); | |
161 } else { | |
162 bool live_objects_only = true; // default is true to retain the behavior before this change is made | |
163 const char* arg1 = op->arg(1); | |
164 if (arg1 != NULL && (strlen(arg1) > 0)) { | |
165 if (strcmp(arg1, "-all") != 0 && strcmp(arg1, "-live") != 0) { | |
166 out->print_cr("Invalid argument to dumpheap operation: %s", arg1); | |
167 return JNI_ERR; | |
168 } | |
169 live_objects_only = strcmp(arg1, "-live") == 0; | |
170 } | |
171 | |
172 // Request a full GC before heap dump if live_objects_only = true | |
173 // This helps reduces the amount of unreachable objects in the dump | |
174 // and makes it easier to browse. | |
175 HeapDumper dumper(live_objects_only /* request GC */); | |
176 int res = dumper.dump(op->arg(0)); | |
177 if (res == 0) { | |
178 out->print_cr("Heap dump file created"); | |
179 } else { | |
180 // heap dump failed | |
181 ResourceMark rm; | |
182 char* error = dumper.error_as_C_string(); | |
183 if (error == NULL) { | |
184 out->print_cr("Dump failed - reason unknown"); | |
185 } else { | |
186 out->print_cr("%s", error); | |
187 } | |
188 } | |
189 } | |
190 return JNI_OK; | |
191 } | |
192 #endif // SERVICES_KERNEL | |
193 | |
194 // Implementation of "inspectheap" command | |
195 // | |
196 // Input arguments :- | |
197 // arg0: "-live" or "-all" | |
198 static jint heap_inspection(AttachOperation* op, outputStream* out) { | |
199 bool live_objects_only = true; // default is true to retain the behavior before this change is made | |
200 const char* arg0 = op->arg(0); | |
201 if (arg0 != NULL && (strlen(arg0) > 0)) { | |
202 if (strcmp(arg0, "-all") != 0 && strcmp(arg0, "-live") != 0) { | |
203 out->print_cr("Invalid argument to inspectheap operation: %s", arg0); | |
204 return JNI_ERR; | |
205 } | |
206 live_objects_only = strcmp(arg0, "-live") == 0; | |
207 } | |
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208 VM_GC_HeapInspection heapop(out, live_objects_only /* request full gc */, true /* need_prologue */); |
0 | 209 VMThread::execute(&heapop); |
210 return JNI_OK; | |
211 } | |
212 | |
213 // set a boolean global flag using value from AttachOperation | |
214 static jint set_bool_flag(const char* name, AttachOperation* op, outputStream* out) { | |
215 bool value = true; | |
216 const char* arg1; | |
217 if ((arg1 = op->arg(1)) != NULL) { | |
218 int tmp; | |
219 int n = sscanf(arg1, "%d", &tmp); | |
220 if (n != 1) { | |
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221 out->print_cr("flag value must be a boolean (1 or 0)"); |
0 | 222 return JNI_ERR; |
223 } | |
224 value = (tmp != 0); | |
225 } | |
226 bool res = CommandLineFlags::boolAtPut((char*)name, &value, ATTACH_ON_DEMAND); | |
227 if (! res) { | |
228 out->print_cr("setting flag %s failed", name); | |
229 } | |
230 return res? JNI_OK : JNI_ERR; | |
231 } | |
232 | |
233 // set a intx global flag using value from AttachOperation | |
234 static jint set_intx_flag(const char* name, AttachOperation* op, outputStream* out) { | |
235 intx value; | |
236 const char* arg1; | |
237 if ((arg1 = op->arg(1)) != NULL) { | |
238 int n = sscanf(arg1, INTX_FORMAT, &value); | |
239 if (n != 1) { | |
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240 out->print_cr("flag value must be an integer"); |
0 | 241 return JNI_ERR; |
242 } | |
243 } | |
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244 bool res = CommandLineFlags::intxAtPut((char*)name, &value, ATTACH_ON_DEMAND); |
0 | 245 if (! res) { |
246 out->print_cr("setting flag %s failed", name); | |
247 } | |
248 | |
249 return res? JNI_OK : JNI_ERR; | |
250 } | |
251 | |
252 // set a uintx global flag using value from AttachOperation | |
253 static jint set_uintx_flag(const char* name, AttachOperation* op, outputStream* out) { | |
254 uintx value; | |
255 const char* arg1; | |
256 if ((arg1 = op->arg(1)) != NULL) { | |
257 int n = sscanf(arg1, UINTX_FORMAT, &value); | |
258 if (n != 1) { | |
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259 out->print_cr("flag value must be an unsigned integer"); |
0 | 260 return JNI_ERR; |
261 } | |
262 } | |
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263 bool res = CommandLineFlags::uintxAtPut((char*)name, &value, ATTACH_ON_DEMAND); |
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264 if (! res) { |
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265 out->print_cr("setting flag %s failed", name); |
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266 } |
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267 |
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268 return res? JNI_OK : JNI_ERR; |
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269 } |
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270 |
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271 // set a uint64_t global flag using value from AttachOperation |
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272 static jint set_uint64_t_flag(const char* name, AttachOperation* op, outputStream* out) { |
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273 uint64_t value; |
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274 const char* arg1; |
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275 if ((arg1 = op->arg(1)) != NULL) { |
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276 int n = sscanf(arg1, UINT64_FORMAT, &value); |
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277 if (n != 1) { |
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278 out->print_cr("flag value must be an unsigned 64-bit integer"); |
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279 return JNI_ERR; |
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280 } |
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281 } |
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282 bool res = CommandLineFlags::uint64_tAtPut((char*)name, &value, ATTACH_ON_DEMAND); |
0 | 283 if (! res) { |
284 out->print_cr("setting flag %s failed", name); | |
285 } | |
286 | |
287 return res? JNI_OK : JNI_ERR; | |
288 } | |
289 | |
290 // set a string global flag using value from AttachOperation | |
291 static jint set_ccstr_flag(const char* name, AttachOperation* op, outputStream* out) { | |
292 const char* value; | |
293 if ((value = op->arg(1)) == NULL) { | |
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294 out->print_cr("flag value must be a string"); |
0 | 295 return JNI_ERR; |
296 } | |
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297 bool res = CommandLineFlags::ccstrAtPut((char*)name, &value, ATTACH_ON_DEMAND); |
0 | 298 if (res) { |
299 FREE_C_HEAP_ARRAY(char, value); | |
300 } else { | |
301 out->print_cr("setting flag %s failed", name); | |
302 } | |
303 | |
304 return res? JNI_OK : JNI_ERR; | |
305 } | |
306 | |
307 // Implementation of "setflag" command | |
308 static jint set_flag(AttachOperation* op, outputStream* out) { | |
309 | |
310 const char* name = NULL; | |
311 if ((name = op->arg(0)) == NULL) { | |
312 out->print_cr("flag name is missing"); | |
313 return JNI_ERR; | |
314 } | |
315 | |
316 Flag* f = Flag::find_flag((char*)name, strlen(name)); | |
317 if (f && f->is_external() && f->is_writeable()) { | |
318 if (f->is_bool()) { | |
319 return set_bool_flag(name, op, out); | |
320 } else if (f->is_intx()) { | |
321 return set_intx_flag(name, op, out); | |
322 } else if (f->is_uintx()) { | |
323 return set_uintx_flag(name, op, out); | |
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324 } else if (f->is_uint64_t()) { |
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325 return set_uint64_t_flag(name, op, out); |
0 | 326 } else if (f->is_ccstr()) { |
327 return set_ccstr_flag(name, op, out); | |
328 } else { | |
329 ShouldNotReachHere(); | |
330 return JNI_ERR; | |
331 } | |
332 } else { | |
333 return AttachListener::pd_set_flag(op, out); | |
334 } | |
335 } | |
336 | |
337 // Implementation of "printflag" command | |
338 static jint print_flag(AttachOperation* op, outputStream* out) { | |
339 const char* name = NULL; | |
340 if ((name = op->arg(0)) == NULL) { | |
341 out->print_cr("flag name is missing"); | |
342 return JNI_ERR; | |
343 } | |
344 Flag* f = Flag::find_flag((char*)name, strlen(name)); | |
345 if (f) { | |
346 f->print_as_flag(out); | |
347 out->print_cr(""); | |
348 } else { | |
349 out->print_cr("no such flag '%s'", name); | |
350 } | |
351 return JNI_OK; | |
352 } | |
353 | |
354 // Table to map operation names to functions. | |
355 | |
356 // names must be of length <= AttachOperation::name_length_max | |
357 static AttachOperationFunctionInfo funcs[] = { | |
358 { "agentProperties", get_agent_properties }, | |
359 { "datadump", data_dump }, | |
360 #ifndef SERVICES_KERNEL | |
361 { "dumpheap", dump_heap }, | |
362 #endif // SERVICES_KERNEL | |
363 { "load", JvmtiExport::load_agent_library }, | |
364 { "properties", get_system_properties }, | |
365 { "threaddump", thread_dump }, | |
366 { "inspectheap", heap_inspection }, | |
367 { "setflag", set_flag }, | |
368 { "printflag", print_flag }, | |
369 { NULL, NULL } | |
370 }; | |
371 | |
372 | |
373 | |
374 // The Attach Listener threads services a queue. It dequeues an operation | |
375 // from the queue, examines the operation name (command), and dispatches | |
376 // to the corresponding function to perform the operation. | |
377 | |
378 static void attach_listener_thread_entry(JavaThread* thread, TRAPS) { | |
379 os::set_priority(thread, NearMaxPriority); | |
380 | |
381 if (AttachListener::pd_init() != 0) { | |
382 return; | |
383 } | |
384 AttachListener::set_initialized(); | |
385 | |
386 for (;;) { | |
387 AttachOperation* op = AttachListener::dequeue(); | |
388 if (op == NULL) { | |
389 return; // dequeue failed or shutdown | |
390 } | |
391 | |
392 ResourceMark rm; | |
393 bufferedStream st; | |
394 jint res = JNI_OK; | |
395 | |
396 // handle special detachall operation | |
397 if (strcmp(op->name(), AttachOperation::detachall_operation_name()) == 0) { | |
398 AttachListener::detachall(); | |
399 } else { | |
400 // find the function to dispatch too | |
401 AttachOperationFunctionInfo* info = NULL; | |
402 for (int i=0; funcs[i].name != NULL; i++) { | |
403 const char* name = funcs[i].name; | |
404 assert(strlen(name) <= AttachOperation::name_length_max, "operation <= name_length_max"); | |
405 if (strcmp(op->name(), name) == 0) { | |
406 info = &(funcs[i]); | |
407 break; | |
408 } | |
409 } | |
410 | |
411 // check for platform dependent attach operation | |
412 if (info == NULL) { | |
413 info = AttachListener::pd_find_operation(op->name()); | |
414 } | |
415 | |
416 if (info != NULL) { | |
417 // dispatch to the function that implements this operation | |
418 res = (info->func)(op, &st); | |
419 } else { | |
420 st.print("Operation %s not recognized!", op->name()); | |
421 res = JNI_ERR; | |
422 } | |
423 } | |
424 | |
425 // operation complete - send result and output to client | |
426 op->complete(res, &st); | |
427 } | |
428 } | |
429 | |
430 // Starts the Attach Listener thread | |
431 void AttachListener::init() { | |
432 EXCEPTION_MARK; | |
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433 klassOop k = SystemDictionary::resolve_or_fail(vmSymbols::java_lang_Thread(), true, CHECK); |
0 | 434 instanceKlassHandle klass (THREAD, k); |
435 instanceHandle thread_oop = klass->allocate_instance_handle(CHECK); | |
436 | |
437 const char thread_name[] = "Attach Listener"; | |
438 Handle string = java_lang_String::create_from_str(thread_name, CHECK); | |
439 | |
440 // Initialize thread_oop to put it into the system threadGroup | |
441 Handle thread_group (THREAD, Universe::system_thread_group()); | |
442 JavaValue result(T_VOID); | |
443 JavaCalls::call_special(&result, thread_oop, | |
444 klass, | |
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445 vmSymbols::object_initializer_name(), |
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446 vmSymbols::threadgroup_string_void_signature(), |
0 | 447 thread_group, |
448 string, | |
449 CHECK); | |
450 | |
1142 | 451 KlassHandle group(THREAD, SystemDictionary::ThreadGroup_klass()); |
0 | 452 JavaCalls::call_special(&result, |
453 thread_group, | |
454 group, | |
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455 vmSymbols::add_method_name(), |
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456 vmSymbols::thread_void_signature(), |
0 | 457 thread_oop, // ARG 1 |
458 CHECK); | |
459 | |
460 { MutexLocker mu(Threads_lock); | |
461 JavaThread* listener_thread = new JavaThread(&attach_listener_thread_entry); | |
462 | |
463 // Check that thread and osthread were created | |
464 if (listener_thread == NULL || listener_thread->osthread() == NULL) { | |
465 vm_exit_during_initialization("java.lang.OutOfMemoryError", | |
466 "unable to create new native thread"); | |
467 } | |
468 | |
469 java_lang_Thread::set_thread(thread_oop(), listener_thread); | |
470 java_lang_Thread::set_daemon(thread_oop()); | |
471 | |
472 listener_thread->set_threadObj(thread_oop()); | |
473 Threads::add(listener_thread); | |
474 Thread::start(listener_thread); | |
475 } | |
476 } | |
477 | |
478 // Performs clean-up tasks on platforms where we can detect that the last | |
479 // client has detached | |
480 void AttachListener::detachall() { | |
481 // call the platform dependent clean-up | |
482 pd_detachall(); | |
483 } |