Mercurial > hg > truffle
annotate src/share/vm/prims/jvmtiManageCapabilities.cpp @ 1604:b918d354830a
6960865: ldc of unloaded class throws an assert in ciTypeFlow
Summary: Support java_mirror for unloaded klasses, arrays as well as instances. Simplify ciTypeFlow by removing unused path.
Reviewed-by: kvn
author | jrose |
---|---|
date | Sat, 12 Jun 2010 22:53:43 -0700 |
parents | c18cbe5936b8 |
children | f95d63e2154a |
rev | line source |
---|---|
0 | 1 /* |
1552
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
1397
diff
changeset
|
2 * Copyright (c) 2003, 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 * | |
1552
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
1397
diff
changeset
|
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
1397
diff
changeset
|
20 * or visit www.oracle.com if you need additional information or have any |
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
1397
diff
changeset
|
21 * questions. |
0 | 22 * |
23 */ | |
24 # include "incls/_precompiled.incl" | |
25 # include "incls/_jvmtiManageCapabilities.cpp.incl" | |
26 | |
27 static const jint CAPA_SIZE = (JVMTI_INTERNAL_CAPABILITY_COUNT + 7) / 8; | |
28 | |
29 // capabilities which are always potentially available | |
30 jvmtiCapabilities JvmtiManageCapabilities::always_capabilities; | |
31 | |
32 // capabilities which are potentially available during OnLoad | |
33 jvmtiCapabilities JvmtiManageCapabilities::onload_capabilities; | |
34 | |
35 // capabilities which are always potentially available | |
36 // but to only one environment | |
37 jvmtiCapabilities JvmtiManageCapabilities::always_solo_capabilities; | |
38 | |
39 // capabilities which are potentially available during OnLoad | |
40 // but to only one environment | |
41 jvmtiCapabilities JvmtiManageCapabilities::onload_solo_capabilities; | |
42 | |
43 // remaining capabilities which are always potentially available | |
44 // but to only one environment | |
45 jvmtiCapabilities JvmtiManageCapabilities::always_solo_remaining_capabilities; | |
46 | |
47 // remaining capabilities which are potentially available during OnLoad | |
48 // but to only one environment | |
49 jvmtiCapabilities JvmtiManageCapabilities::onload_solo_remaining_capabilities; | |
50 | |
51 // all capabilities ever acquired | |
52 jvmtiCapabilities JvmtiManageCapabilities::acquired_capabilities; | |
53 | |
54 void JvmtiManageCapabilities::initialize() { | |
55 always_capabilities = init_always_capabilities(); | |
56 if (JvmtiEnv::get_phase() != JVMTI_PHASE_ONLOAD) { | |
57 recompute_always_capabilities(); | |
58 } | |
59 onload_capabilities = init_onload_capabilities(); | |
60 always_solo_capabilities = init_always_solo_capabilities(); | |
61 onload_solo_capabilities = init_onload_solo_capabilities(); | |
62 always_solo_remaining_capabilities = init_always_solo_capabilities(); | |
63 onload_solo_remaining_capabilities = init_onload_solo_capabilities(); | |
64 memset(&acquired_capabilities, 0, sizeof(acquired_capabilities)); | |
65 } | |
66 | |
67 // if the capability sets are initialized in the onload phase then | |
68 // it happens before class data sharing (CDS) is initialized. If it | |
69 // turns out that CDS gets disabled then we must adjust the always | |
70 // capabilities. To ensure a consistent view of the capabililties | |
71 // anything we add here should already be in the onload set. | |
72 void JvmtiManageCapabilities::recompute_always_capabilities() { | |
73 if (!UseSharedSpaces) { | |
74 jvmtiCapabilities jc = always_capabilities; | |
75 jc.can_generate_all_class_hook_events = 1; | |
76 always_capabilities = jc; | |
77 } | |
78 } | |
79 | |
80 | |
81 // corresponding init functions | |
82 jvmtiCapabilities JvmtiManageCapabilities::init_always_capabilities() { | |
83 jvmtiCapabilities jc; | |
84 | |
85 memset(&jc, 0, sizeof(jc)); | |
86 jc.can_get_bytecodes = 1; | |
87 jc.can_signal_thread = 1; | |
88 jc.can_get_source_file_name = 1; | |
89 jc.can_get_line_numbers = 1; | |
90 jc.can_get_synthetic_attribute = 1; | |
91 jc.can_get_monitor_info = 1; | |
92 jc.can_get_constant_pool = 1; | |
93 jc.can_generate_monitor_events = 1; | |
94 jc.can_generate_garbage_collection_events = 1; | |
95 jc.can_generate_compiled_method_load_events = 1; | |
96 jc.can_generate_native_method_bind_events = 1; | |
97 jc.can_generate_vm_object_alloc_events = 1; | |
98 if (os::is_thread_cpu_time_supported()) { | |
99 jc.can_get_current_thread_cpu_time = 1; | |
100 jc.can_get_thread_cpu_time = 1; | |
101 } | |
102 jc.can_redefine_classes = 1; | |
103 jc.can_redefine_any_class = 1; | |
104 jc.can_retransform_classes = 1; | |
105 jc.can_retransform_any_class = 1; | |
106 jc.can_set_native_method_prefix = 1; | |
107 jc.can_tag_objects = 1; | |
108 jc.can_generate_object_free_events = 1; | |
109 jc.can_generate_resource_exhaustion_heap_events = 1; | |
110 jc.can_generate_resource_exhaustion_threads_events = 1; | |
111 return jc; | |
112 } | |
113 | |
114 jvmtiCapabilities JvmtiManageCapabilities::init_onload_capabilities() { | |
115 jvmtiCapabilities jc; | |
116 | |
117 memset(&jc, 0, sizeof(jc)); | |
1078 | 118 #ifndef CC_INTERP |
0 | 119 jc.can_pop_frame = 1; |
120 jc.can_force_early_return = 1; | |
1078 | 121 #endif // !CC_INTERP |
0 | 122 jc.can_get_source_debug_extension = 1; |
123 jc.can_access_local_variables = 1; | |
124 jc.can_maintain_original_method_order = 1; | |
125 jc.can_generate_all_class_hook_events = 1; | |
126 jc.can_generate_single_step_events = 1; | |
127 jc.can_generate_exception_events = 1; | |
128 jc.can_generate_frame_pop_events = 1; | |
129 jc.can_generate_method_entry_events = 1; | |
130 jc.can_generate_method_exit_events = 1; | |
131 jc.can_get_owned_monitor_info = 1; | |
132 jc.can_get_owned_monitor_stack_depth_info = 1; | |
133 jc.can_get_current_contended_monitor = 1; | |
134 // jc.can_get_monitor_info = 1; | |
135 jc.can_tag_objects = 1; // TODO: this should have been removed | |
136 jc.can_generate_object_free_events = 1; // TODO: this should have been removed | |
137 return jc; | |
138 } | |
139 | |
140 | |
141 jvmtiCapabilities JvmtiManageCapabilities::init_always_solo_capabilities() { | |
142 jvmtiCapabilities jc; | |
143 | |
144 memset(&jc, 0, sizeof(jc)); | |
145 jc.can_suspend = 1; | |
146 return jc; | |
147 } | |
148 | |
149 | |
150 jvmtiCapabilities JvmtiManageCapabilities::init_onload_solo_capabilities() { | |
151 jvmtiCapabilities jc; | |
152 | |
153 memset(&jc, 0, sizeof(jc)); | |
154 jc.can_generate_field_modification_events = 1; | |
155 jc.can_generate_field_access_events = 1; | |
156 jc.can_generate_breakpoint_events = 1; | |
157 return jc; | |
158 } | |
159 | |
160 | |
161 jvmtiCapabilities *JvmtiManageCapabilities::either(const jvmtiCapabilities *a, const jvmtiCapabilities *b, | |
162 jvmtiCapabilities *result) { | |
163 char *ap = (char *)a; | |
164 char *bp = (char *)b; | |
165 char *resultp = (char *)result; | |
166 | |
167 for (int i = 0; i < CAPA_SIZE; ++i) { | |
168 *resultp++ = *ap++ | *bp++; | |
169 } | |
170 | |
171 return result; | |
172 } | |
173 | |
174 | |
175 jvmtiCapabilities *JvmtiManageCapabilities::both(const jvmtiCapabilities *a, const jvmtiCapabilities *b, | |
176 jvmtiCapabilities *result) { | |
177 char *ap = (char *)a; | |
178 char *bp = (char *)b; | |
179 char *resultp = (char *)result; | |
180 | |
181 for (int i = 0; i < CAPA_SIZE; ++i) { | |
182 *resultp++ = *ap++ & *bp++; | |
183 } | |
184 | |
185 return result; | |
186 } | |
187 | |
188 | |
189 jvmtiCapabilities *JvmtiManageCapabilities::exclude(const jvmtiCapabilities *a, const jvmtiCapabilities *b, | |
190 jvmtiCapabilities *result) { | |
191 char *ap = (char *)a; | |
192 char *bp = (char *)b; | |
193 char *resultp = (char *)result; | |
194 | |
195 for (int i = 0; i < CAPA_SIZE; ++i) { | |
196 *resultp++ = *ap++ & ~*bp++; | |
197 } | |
198 | |
199 return result; | |
200 } | |
201 | |
202 | |
203 bool JvmtiManageCapabilities::has_some(const jvmtiCapabilities *a) { | |
204 char *ap = (char *)a; | |
205 | |
206 for (int i = 0; i < CAPA_SIZE; ++i) { | |
207 if (*ap++ != 0) { | |
208 return true; | |
209 } | |
210 } | |
211 | |
212 return false; | |
213 } | |
214 | |
215 | |
216 void JvmtiManageCapabilities::copy_capabilities(const jvmtiCapabilities *from, jvmtiCapabilities *to) { | |
217 char *ap = (char *)from; | |
218 char *resultp = (char *)to; | |
219 | |
220 for (int i = 0; i < CAPA_SIZE; ++i) { | |
221 *resultp++ = *ap++; | |
222 } | |
223 } | |
224 | |
225 | |
226 void JvmtiManageCapabilities::get_potential_capabilities(const jvmtiCapabilities *current, | |
227 const jvmtiCapabilities *prohibited, | |
228 jvmtiCapabilities *result) { | |
229 // exclude prohibited capabilities, must be before adding current | |
230 exclude(&always_capabilities, prohibited, result); | |
231 | |
232 // must include current since it may possess solo capabilities and now prohibited | |
233 either(result, current, result); | |
234 | |
235 // add other remaining | |
236 either(result, &always_solo_remaining_capabilities, result); | |
237 | |
238 // if this is during OnLoad more capabilities are available | |
239 if (JvmtiEnv::get_phase() == JVMTI_PHASE_ONLOAD) { | |
240 either(result, &onload_capabilities, result); | |
241 either(result, &onload_solo_remaining_capabilities, result); | |
242 } | |
243 } | |
244 | |
245 jvmtiError JvmtiManageCapabilities::add_capabilities(const jvmtiCapabilities *current, | |
246 const jvmtiCapabilities *prohibited, | |
247 const jvmtiCapabilities *desired, | |
248 jvmtiCapabilities *result) { | |
249 // check that the capabilities being added are potential capabilities | |
250 jvmtiCapabilities temp; | |
251 get_potential_capabilities(current, prohibited, &temp); | |
252 if (has_some(exclude(desired, &temp, &temp))) { | |
253 return JVMTI_ERROR_NOT_AVAILABLE; | |
254 } | |
255 | |
256 // add to the set of ever acquired capabilities | |
257 either(&acquired_capabilities, desired, &acquired_capabilities); | |
258 | |
259 // onload capabilities that got added are now permanent - so, also remove from onload | |
260 both(&onload_capabilities, desired, &temp); | |
261 either(&always_capabilities, &temp, &always_capabilities); | |
262 exclude(&onload_capabilities, &temp, &onload_capabilities); | |
263 | |
264 // same for solo capabilities (transferred capabilities in the remaining sets handled as part of standard grab - below) | |
265 both(&onload_solo_capabilities, desired, &temp); | |
266 either(&always_solo_capabilities, &temp, &always_solo_capabilities); | |
267 exclude(&onload_solo_capabilities, &temp, &onload_solo_capabilities); | |
268 | |
269 // remove solo capabilities that are now taken | |
270 exclude(&always_solo_remaining_capabilities, desired, &always_solo_remaining_capabilities); | |
271 exclude(&onload_solo_remaining_capabilities, desired, &onload_solo_remaining_capabilities); | |
272 | |
273 // return the result | |
274 either(current, desired, result); | |
275 | |
276 update(); | |
277 | |
278 return JVMTI_ERROR_NONE; | |
279 } | |
280 | |
281 | |
282 void JvmtiManageCapabilities::relinquish_capabilities(const jvmtiCapabilities *current, | |
283 const jvmtiCapabilities *unwanted, | |
284 jvmtiCapabilities *result) { | |
285 jvmtiCapabilities to_trash; | |
286 jvmtiCapabilities temp; | |
287 | |
288 // can't give up what you don't have | |
289 both(current, unwanted, &to_trash); | |
290 | |
291 // restore solo capabilities but only those that belong | |
292 either(&always_solo_remaining_capabilities, both(&always_solo_capabilities, &to_trash, &temp), | |
293 &always_solo_remaining_capabilities); | |
294 either(&onload_solo_remaining_capabilities, both(&onload_solo_capabilities, &to_trash, &temp), | |
295 &onload_solo_remaining_capabilities); | |
296 | |
297 update(); | |
298 | |
299 // return the result | |
300 exclude(current, unwanted, result); | |
301 } | |
302 | |
303 | |
304 void JvmtiManageCapabilities::update() { | |
305 jvmtiCapabilities avail; | |
306 | |
307 // all capabilities | |
308 either(&always_capabilities, &always_solo_capabilities, &avail); | |
309 | |
310 bool interp_events = | |
311 avail.can_generate_field_access_events || | |
312 avail.can_generate_field_modification_events || | |
313 avail.can_generate_single_step_events || | |
314 avail.can_generate_frame_pop_events || | |
315 avail.can_generate_method_entry_events || | |
316 avail.can_generate_method_exit_events; | |
317 bool enter_all_methods = | |
318 interp_events || | |
319 avail.can_generate_breakpoint_events; | |
320 UseFastEmptyMethods = !enter_all_methods; | |
321 UseFastAccessorMethods = !enter_all_methods; | |
322 | |
323 if (avail.can_generate_breakpoint_events) { | |
324 RewriteFrequentPairs = false; | |
325 } | |
326 | |
327 // If can_redefine_classes is enabled in the onload phase then we know that the | |
328 // dependency information recorded by the compiler is complete. | |
329 if ((avail.can_redefine_classes || avail.can_retransform_classes) && | |
330 JvmtiEnv::get_phase() == JVMTI_PHASE_ONLOAD) { | |
331 JvmtiExport::set_all_dependencies_are_recorded(true); | |
332 } | |
333 | |
334 JvmtiExport::set_can_get_source_debug_extension(avail.can_get_source_debug_extension); | |
335 JvmtiExport::set_can_maintain_original_method_order(avail.can_maintain_original_method_order); | |
336 JvmtiExport::set_can_post_interpreter_events(interp_events); | |
337 JvmtiExport::set_can_hotswap_or_post_breakpoint( | |
338 avail.can_generate_breakpoint_events || | |
339 avail.can_redefine_classes || | |
340 avail.can_retransform_classes); | |
341 JvmtiExport::set_can_modify_any_class( | |
342 avail.can_generate_breakpoint_events || | |
343 avail.can_generate_all_class_hook_events); | |
344 JvmtiExport::set_can_walk_any_space( | |
345 avail.can_tag_objects); // disable sharing in onload phase | |
1397
b4776199210f
6943485: JVMTI always on capabilities change code generation too much
never
parents:
1213
diff
changeset
|
346 // This controls whether the compilers keep extra locals live to |
b4776199210f
6943485: JVMTI always on capabilities change code generation too much
never
parents:
1213
diff
changeset
|
347 // improve the debugging experience so only set them if the selected |
b4776199210f
6943485: JVMTI always on capabilities change code generation too much
never
parents:
1213
diff
changeset
|
348 // capabilities look like a debugger. |
0 | 349 JvmtiExport::set_can_access_local_variables( |
1397
b4776199210f
6943485: JVMTI always on capabilities change code generation too much
never
parents:
1213
diff
changeset
|
350 avail.can_access_local_variables || |
b4776199210f
6943485: JVMTI always on capabilities change code generation too much
never
parents:
1213
diff
changeset
|
351 avail.can_generate_breakpoint_events || |
b4776199210f
6943485: JVMTI always on capabilities change code generation too much
never
parents:
1213
diff
changeset
|
352 avail.can_generate_frame_pop_events); |
1213
6deeaebad47a
6902182: 4/4 Starting with jdwp agent should not incur performance penalty
dcubed
parents:
1078
diff
changeset
|
353 JvmtiExport::set_can_post_on_exceptions( |
0 | 354 avail.can_generate_exception_events || |
355 avail.can_generate_frame_pop_events || | |
356 avail.can_generate_method_exit_events); | |
357 JvmtiExport::set_can_post_breakpoint(avail.can_generate_breakpoint_events); | |
358 JvmtiExport::set_can_post_field_access(avail.can_generate_field_access_events); | |
359 JvmtiExport::set_can_post_field_modification(avail.can_generate_field_modification_events); | |
360 JvmtiExport::set_can_post_method_entry(avail.can_generate_method_entry_events); | |
361 JvmtiExport::set_can_post_method_exit(avail.can_generate_method_exit_events || | |
362 avail.can_generate_frame_pop_events); | |
363 JvmtiExport::set_can_pop_frame(avail.can_pop_frame); | |
364 JvmtiExport::set_can_force_early_return(avail.can_force_early_return); | |
365 JvmtiExport::set_should_clean_up_heap_objects(avail.can_generate_breakpoint_events); | |
366 } | |
367 | |
368 #ifndef PRODUCT | |
369 | |
370 void JvmtiManageCapabilities:: print(const jvmtiCapabilities* cap) { | |
371 tty->print_cr("----- capabilities -----"); | |
372 if (cap->can_tag_objects) | |
373 tty->print_cr("can_tag_objects"); | |
374 if (cap->can_generate_field_modification_events) | |
375 tty->print_cr("can_generate_field_modification_events"); | |
376 if (cap->can_generate_field_access_events) | |
377 tty->print_cr("can_generate_field_access_events"); | |
378 if (cap->can_get_bytecodes) | |
379 tty->print_cr("can_get_bytecodes"); | |
380 if (cap->can_get_synthetic_attribute) | |
381 tty->print_cr("can_get_synthetic_attribute"); | |
382 if (cap->can_get_owned_monitor_info) | |
383 tty->print_cr("can_get_owned_monitor_info"); | |
384 if (cap->can_get_current_contended_monitor) | |
385 tty->print_cr("can_get_current_contended_monitor"); | |
386 if (cap->can_get_monitor_info) | |
387 tty->print_cr("can_get_monitor_info"); | |
388 if (cap->can_get_constant_pool) | |
389 tty->print_cr("can_get_constant_pool"); | |
390 if (cap->can_pop_frame) | |
391 tty->print_cr("can_pop_frame"); | |
392 if (cap->can_force_early_return) | |
393 tty->print_cr("can_force_early_return"); | |
394 if (cap->can_redefine_classes) | |
395 tty->print_cr("can_redefine_classes"); | |
396 if (cap->can_retransform_classes) | |
397 tty->print_cr("can_retransform_classes"); | |
398 if (cap->can_signal_thread) | |
399 tty->print_cr("can_signal_thread"); | |
400 if (cap->can_get_source_file_name) | |
401 tty->print_cr("can_get_source_file_name"); | |
402 if (cap->can_get_line_numbers) | |
403 tty->print_cr("can_get_line_numbers"); | |
404 if (cap->can_get_source_debug_extension) | |
405 tty->print_cr("can_get_source_debug_extension"); | |
406 if (cap->can_access_local_variables) | |
407 tty->print_cr("can_access_local_variables"); | |
408 if (cap->can_maintain_original_method_order) | |
409 tty->print_cr("can_maintain_original_method_order"); | |
410 if (cap->can_generate_single_step_events) | |
411 tty->print_cr("can_generate_single_step_events"); | |
412 if (cap->can_generate_exception_events) | |
413 tty->print_cr("can_generate_exception_events"); | |
414 if (cap->can_generate_frame_pop_events) | |
415 tty->print_cr("can_generate_frame_pop_events"); | |
416 if (cap->can_generate_breakpoint_events) | |
417 tty->print_cr("can_generate_breakpoint_events"); | |
418 if (cap->can_suspend) | |
419 tty->print_cr("can_suspend"); | |
420 if (cap->can_redefine_any_class ) | |
421 tty->print_cr("can_redefine_any_class"); | |
422 if (cap->can_retransform_any_class ) | |
423 tty->print_cr("can_retransform_any_class"); | |
424 if (cap->can_get_current_thread_cpu_time) | |
425 tty->print_cr("can_get_current_thread_cpu_time"); | |
426 if (cap->can_get_thread_cpu_time) | |
427 tty->print_cr("can_get_thread_cpu_time"); | |
428 if (cap->can_generate_method_entry_events) | |
429 tty->print_cr("can_generate_method_entry_events"); | |
430 if (cap->can_generate_method_exit_events) | |
431 tty->print_cr("can_generate_method_exit_events"); | |
432 if (cap->can_generate_all_class_hook_events) | |
433 tty->print_cr("can_generate_all_class_hook_events"); | |
434 if (cap->can_generate_compiled_method_load_events) | |
435 tty->print_cr("can_generate_compiled_method_load_events"); | |
436 if (cap->can_generate_monitor_events) | |
437 tty->print_cr("can_generate_monitor_events"); | |
438 if (cap->can_generate_vm_object_alloc_events) | |
439 tty->print_cr("can_generate_vm_object_alloc_events"); | |
440 if (cap->can_generate_native_method_bind_events) | |
441 tty->print_cr("can_generate_native_method_bind_events"); | |
442 if (cap->can_generate_garbage_collection_events) | |
443 tty->print_cr("can_generate_garbage_collection_events"); | |
444 if (cap->can_generate_object_free_events) | |
445 tty->print_cr("can_generate_object_free_events"); | |
446 if (cap->can_generate_resource_exhaustion_heap_events) | |
447 tty->print_cr("can_generate_resource_exhaustion_heap_events"); | |
448 if (cap->can_generate_resource_exhaustion_threads_events) | |
449 tty->print_cr("can_generate_resource_exhaustion_threads_events"); | |
450 } | |
451 | |
452 #endif |