Mercurial > hg > graal-jvmci-8
annotate src/share/vm/prims/jvmtiEnvBase.hpp @ 14653:0d8d78c0329a
6471769: Error: assert(_cur_stack_depth == count_frames(),"cur_stack_depth out of sync")
Summary: It is more safe to get/update data for suspended threads at a safepoint
Reviewed-by: dcubed, twisti, dholmes
Contributed-by: serguei.spitsyn@oracle.com
| author | sspitsyn |
|---|---|
| date | Sat, 01 Mar 2014 08:05:55 -0800 |
| parents | 402677ca28ed |
| children | 92aa6797d639 |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 2003, 2014, 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 #ifndef SHARE_VM_PRIMS_JVMTIENVBASE_HPP |
| 26 #define SHARE_VM_PRIMS_JVMTIENVBASE_HPP | |
| 27 | |
| 28 #include "classfile/classLoader.hpp" | |
| 29 #include "prims/jvmtiEnvThreadState.hpp" | |
| 30 #include "prims/jvmtiEventController.hpp" | |
| 31 #include "prims/jvmtiThreadState.hpp" | |
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32 #include "prims/jvmtiThreadState.inline.hpp" |
| 1972 | 33 #include "runtime/fieldDescriptor.hpp" |
| 34 #include "runtime/frame.hpp" | |
| 35 #include "runtime/handles.inline.hpp" | |
| 36 #include "runtime/thread.hpp" | |
| 37 #include "runtime/vm_operations.hpp" | |
| 38 #include "utilities/growableArray.hpp" | |
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39 #include "utilities/macros.hpp" |
| 0 | 40 |
| 41 // | |
| 42 // Forward Declarations | |
| 43 // | |
| 44 | |
| 45 class JvmtiEnv; | |
| 46 class JvmtiThreadState; | |
| 47 class JvmtiRawMonitor; // for jvmtiEnv.hpp | |
| 48 class JvmtiEventControllerPrivate; | |
| 49 class JvmtiTagMap; | |
| 50 | |
| 51 | |
| 52 | |
| 53 // One JvmtiEnv object is created per jvmti attachment; | |
| 54 // done via JNI GetEnv() call. Multiple attachments are | |
| 55 // allowed in jvmti. | |
| 56 | |
| 6197 | 57 class JvmtiEnvBase : public CHeapObj<mtInternal> { |
| 0 | 58 |
| 59 private: | |
| 60 | |
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61 #if INCLUDE_JVMTI |
| 0 | 62 static JvmtiEnvBase* _head_environment; // head of environment list |
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63 #endif // INCLUDE_JVMTI |
| 0 | 64 |
| 65 static bool _globally_initialized; | |
| 66 static jvmtiPhase _phase; | |
| 67 static volatile int _dying_thread_env_iteration_count; | |
| 68 | |
| 69 public: | |
| 70 | |
| 71 enum { | |
| 72 JDK15_JVMTI_VERSION = JVMTI_VERSION_1_0 + 33, /* version: 1.0.33 */ | |
| 1988 | 73 JDK16_JVMTI_VERSION = JVMTI_VERSION_1_1 + 102, /* version: 1.1.102 */ |
| 6919 | 74 JDK17_JVMTI_VERSION = JVMTI_VERSION_1_2 + 2 /* version: 1.2.2 */ |
| 0 | 75 }; |
| 76 | |
| 77 static jvmtiPhase get_phase() { return _phase; } | |
| 78 static void set_phase(jvmtiPhase phase) { _phase = phase; } | |
| 79 static bool is_vm_live() { return _phase == JVMTI_PHASE_LIVE; } | |
| 80 | |
| 81 static void entering_dying_thread_env_iteration() { ++_dying_thread_env_iteration_count; } | |
| 82 static void leaving_dying_thread_env_iteration() { --_dying_thread_env_iteration_count; } | |
| 83 static bool is_inside_dying_thread_env_iteration(){ return _dying_thread_env_iteration_count > 0; } | |
| 84 | |
| 85 private: | |
| 86 | |
| 87 enum { | |
| 88 JVMTI_MAGIC = 0x71EE, | |
| 89 DISPOSED_MAGIC = 0xDEFC, | |
| 90 BAD_MAGIC = 0xDEAD | |
| 91 }; | |
| 92 | |
| 93 jvmtiEnv _jvmti_external; | |
| 94 jint _magic; | |
| 1121 | 95 jint _version; // version value passed to JNI GetEnv() |
| 0 | 96 JvmtiEnvBase* _next; |
| 97 bool _is_retransformable; | |
| 98 const void *_env_local_storage; // per env agent allocated data. | |
| 99 jvmtiEventCallbacks _event_callbacks; | |
| 100 jvmtiExtEventCallbacks _ext_event_callbacks; | |
| 101 JvmtiTagMap* _tag_map; | |
| 102 JvmtiEnvEventEnable _env_event_enable; | |
| 103 jvmtiCapabilities _current_capabilities; | |
| 104 jvmtiCapabilities _prohibited_capabilities; | |
| 105 volatile bool _class_file_load_hook_ever_enabled; | |
| 106 static volatile bool _needs_clean_up; | |
| 107 char** _native_method_prefixes; | |
| 108 int _native_method_prefix_count; | |
| 109 | |
| 110 protected: | |
| 1121 | 111 JvmtiEnvBase(jint version); |
| 0 | 112 ~JvmtiEnvBase(); |
| 113 void dispose(); | |
| 114 void env_dispose(); | |
| 115 | |
| 116 void set_env_local_storage(const void* data) { _env_local_storage = data; } | |
| 117 const void* get_env_local_storage() { return _env_local_storage; } | |
| 118 | |
| 119 void record_class_file_load_hook_enabled(); | |
| 120 void record_first_time_class_file_load_hook_enabled(); | |
| 121 | |
| 122 char** get_native_method_prefixes() { return _native_method_prefixes; } | |
| 123 int get_native_method_prefix_count() { return _native_method_prefix_count; } | |
| 124 jvmtiError set_native_method_prefixes(jint prefix_count, char** prefixes); | |
| 125 | |
| 126 private: | |
| 127 friend class JvmtiEventControllerPrivate; | |
| 128 void initialize(); | |
| 129 void set_event_callbacks(const jvmtiEventCallbacks* callbacks, jint size_of_callbacks); | |
| 130 static void globally_initialize(); | |
| 131 static void periodic_clean_up(); | |
| 132 | |
| 133 friend class JvmtiEnvIterator; | |
| 134 JvmtiEnv* next_environment() { return (JvmtiEnv*)_next; } | |
| 135 void set_next_environment(JvmtiEnvBase* env) { _next = env; } | |
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136 static JvmtiEnv* head_environment() { |
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137 JVMTI_ONLY(return (JvmtiEnv*)_head_environment); |
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138 NOT_JVMTI(return NULL); |
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139 } |
| 0 | 140 |
| 141 public: | |
| 142 | |
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143 bool is_valid(); |
| 0 | 144 |
| 1121 | 145 bool use_version_1_0_semantics(); // agent asked for version 1.0 |
| 146 bool use_version_1_1_semantics(); // agent asked for version 1.1 | |
| 1988 | 147 bool use_version_1_2_semantics(); // agent asked for version 1.2 |
| 1121 | 148 |
| 0 | 149 bool is_retransformable() { return _is_retransformable; } |
| 150 | |
| 151 static ByteSize jvmti_external_offset() { | |
| 152 return byte_offset_of(JvmtiEnvBase, _jvmti_external); | |
| 153 }; | |
| 154 | |
| 155 static JvmtiEnv* JvmtiEnv_from_jvmti_env(jvmtiEnv *env) { | |
| 156 return (JvmtiEnv*)((intptr_t)env - in_bytes(jvmti_external_offset())); | |
| 157 }; | |
| 158 | |
| 159 jvmtiCapabilities *get_capabilities() { return &_current_capabilities; } | |
| 160 | |
| 161 jvmtiCapabilities *get_prohibited_capabilities() { return &_prohibited_capabilities; } | |
| 162 | |
| 163 static char** get_all_native_method_prefixes(int* count_ptr); | |
| 164 | |
| 165 // This test will answer true when all environments have been disposed and some have | |
| 166 // not yet been deallocated. As a result, this test should only be used as an | |
| 167 // optimization for the no environment case. | |
| 168 static bool environments_might_exist() { | |
| 169 return head_environment() != NULL; | |
| 170 } | |
| 171 | |
| 172 static void check_for_periodic_clean_up(); | |
| 173 | |
| 174 JvmtiEnvEventEnable *env_event_enable() { | |
| 175 return &_env_event_enable; | |
| 176 } | |
| 177 | |
| 178 jvmtiError allocate(jlong size, unsigned char** mem_ptr) { | |
| 179 if (size < 0) { | |
| 180 return JVMTI_ERROR_ILLEGAL_ARGUMENT; | |
| 181 } | |
| 182 if (size == 0) { | |
| 183 *mem_ptr = NULL; | |
| 184 } else { | |
| 6197 | 185 *mem_ptr = (unsigned char *)os::malloc((size_t)size, mtInternal); |
| 0 | 186 if (*mem_ptr == NULL) { |
| 187 return JVMTI_ERROR_OUT_OF_MEMORY; | |
| 188 } | |
| 189 } | |
| 190 return JVMTI_ERROR_NONE; | |
| 191 } | |
| 192 | |
| 193 jvmtiError deallocate(unsigned char* mem) { | |
| 194 if (mem != NULL) { | |
| 6197 | 195 os::free(mem, mtInternal); |
| 0 | 196 } |
| 197 return JVMTI_ERROR_NONE; | |
| 198 } | |
| 199 | |
| 200 | |
| 201 // Memory functions | |
| 202 unsigned char* jvmtiMalloc(jlong size); // don't use this - call allocate | |
| 203 | |
| 204 // method to create a local handle | |
| 205 jobject jni_reference(Handle hndl) { | |
| 206 return JNIHandles::make_local(hndl()); | |
| 207 } | |
| 208 | |
| 209 // method to create a local handle. | |
| 210 // This function allows caller to specify which | |
| 211 // threads local handle table to use. | |
| 212 jobject jni_reference(JavaThread *thread, Handle hndl) { | |
| 213 return JNIHandles::make_local(thread, hndl()); | |
| 214 } | |
| 215 | |
| 216 // method to destroy a local handle | |
| 217 void destroy_jni_reference(jobject jobj) { | |
| 218 JNIHandles::destroy_local(jobj); | |
| 219 } | |
| 220 | |
| 221 // method to destroy a local handle. | |
| 222 // This function allows caller to specify which | |
| 223 // threads local handle table to use although currently it is | |
| 224 // not used. | |
| 225 void destroy_jni_reference(JavaThread *thread, jobject jobj) { | |
| 226 destroy_jni_reference(jobj); | |
| 227 } | |
| 228 | |
| 229 jvmtiEnv* jvmti_external() { return &_jvmti_external; }; | |
| 230 | |
| 231 // Event Dispatch | |
| 232 | |
| 233 bool has_callback(jvmtiEvent event_type) { | |
| 234 assert(event_type >= JVMTI_MIN_EVENT_TYPE_VAL && | |
| 235 event_type <= JVMTI_MAX_EVENT_TYPE_VAL, "checking"); | |
| 236 return ((void**)&_event_callbacks)[event_type-JVMTI_MIN_EVENT_TYPE_VAL] != NULL; | |
| 237 } | |
| 238 | |
| 239 jvmtiEventCallbacks* callbacks() { | |
| 240 return &_event_callbacks; | |
| 241 } | |
| 242 | |
| 243 jvmtiExtEventCallbacks* ext_callbacks() { | |
| 244 return &_ext_event_callbacks; | |
| 245 } | |
| 246 | |
| 247 void set_tag_map(JvmtiTagMap* tag_map) { | |
| 248 _tag_map = tag_map; | |
| 249 } | |
| 250 | |
| 251 JvmtiTagMap* tag_map() { | |
| 252 return _tag_map; | |
| 253 } | |
| 254 | |
| 255 | |
| 256 // return true if event is enabled globally or for any thread | |
| 257 // True only if there is a callback for it. | |
| 258 bool is_enabled(jvmtiEvent event_type) { | |
| 259 return _env_event_enable.is_enabled(event_type); | |
| 260 } | |
| 261 | |
| 262 // Random Utilities | |
| 263 | |
| 264 protected: | |
| 265 // helper methods for creating arrays of global JNI Handles from local Handles | |
| 266 // allocated into environment specific storage | |
| 267 jobject * new_jobjectArray(int length, Handle *handles); | |
| 268 jthread * new_jthreadArray(int length, Handle *handles); | |
| 269 jthreadGroup * new_jthreadGroupArray(int length, Handle *handles); | |
| 270 | |
| 271 // convert from JNIHandle to JavaThread * | |
| 272 JavaThread * get_JavaThread(jthread jni_thread); | |
| 273 | |
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274 // convert to a jni jclass from a non-null Klass* |
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275 jclass get_jni_class_non_null(Klass* k); |
| 0 | 276 |
| 277 jint count_locked_objects(JavaThread *java_thread, Handle hobj); | |
| 278 jvmtiError get_locked_objects_in_frame(JavaThread *calling_thread, | |
| 279 JavaThread* java_thread, | |
| 280 javaVFrame *jvf, | |
| 281 GrowableArray<jvmtiMonitorStackDepthInfo*>* owned_monitors_list, | |
| 282 jint depth); | |
| 283 vframe* vframeFor(JavaThread* java_thread, jint depth); | |
| 284 | |
| 285 public: | |
| 286 // get a field descriptor for the specified class and field | |
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287 static bool get_field_descriptor(Klass* k, jfieldID field, fieldDescriptor* fd); |
| 0 | 288 // test for suspend - most (all?) of these should go away |
| 289 static bool is_thread_fully_suspended(JavaThread *thread, | |
| 290 bool wait_for_suspend, | |
| 291 uint32_t *bits); | |
| 292 | |
| 293 | |
| 294 // JVMTI API helper functions which are called at safepoint or thread is suspended. | |
| 295 jvmtiError get_frame_count(JvmtiThreadState *state, jint *count_ptr); | |
| 296 jvmtiError get_frame_location(JavaThread* java_thread, jint depth, | |
| 297 jmethodID* method_ptr, jlocation* location_ptr); | |
| 298 jvmtiError get_object_monitor_usage(JavaThread *calling_thread, | |
| 299 jobject object, jvmtiMonitorUsage* info_ptr); | |
| 300 jvmtiError get_stack_trace(JavaThread *java_thread, | |
| 301 jint stack_depth, jint max_count, | |
| 302 jvmtiFrameInfo* frame_buffer, jint* count_ptr); | |
| 303 jvmtiError get_current_contended_monitor(JavaThread *calling_thread, | |
| 304 JavaThread *java_thread, | |
| 305 jobject *monitor_ptr); | |
| 306 jvmtiError get_owned_monitors(JavaThread *calling_thread, JavaThread* java_thread, | |
| 307 GrowableArray<jvmtiMonitorStackDepthInfo*> *owned_monitors_list); | |
| 308 jvmtiError check_top_frame(JavaThread* current_thread, JavaThread* java_thread, | |
| 309 jvalue value, TosState tos, Handle* ret_ob_h); | |
| 310 jvmtiError force_early_return(JavaThread* java_thread, jvalue value, TosState tos); | |
| 311 }; | |
| 312 | |
| 313 // This class is the only safe means of iterating through environments. | |
| 314 // Note that this iteratation includes invalid environments pending | |
| 315 // deallocation -- in fact, some uses depend on this behavior. | |
| 316 | |
| 317 class JvmtiEnvIterator : public StackObj { | |
| 318 private: | |
| 319 bool _entry_was_marked; | |
| 320 public: | |
| 321 JvmtiEnvIterator() { | |
| 322 if (Threads::number_of_threads() == 0) { | |
| 323 _entry_was_marked = false; // we are single-threaded, no need | |
| 324 } else { | |
| 325 Thread::current()->entering_jvmti_env_iteration(); | |
| 326 _entry_was_marked = true; | |
| 327 } | |
| 328 } | |
| 329 ~JvmtiEnvIterator() { | |
| 330 if (_entry_was_marked) { | |
| 331 Thread::current()->leaving_jvmti_env_iteration(); | |
| 332 } | |
| 333 } | |
| 334 JvmtiEnv* first() { return JvmtiEnvBase::head_environment(); } | |
| 335 JvmtiEnv* next(JvmtiEnvBase* env) { return env->next_environment(); } | |
| 336 }; | |
| 337 | |
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338 // VM operation to update for pop top frame. |
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339 class VM_UpdateForPopTopFrame : public VM_Operation { |
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340 private: |
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341 JvmtiThreadState* _state; |
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342 jvmtiError _result; |
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343 |
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344 public: |
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345 VM_UpdateForPopTopFrame(JvmtiThreadState* state) { |
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346 _state = state; |
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347 _result = JVMTI_ERROR_NONE; |
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348 } |
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349 VMOp_Type type() const { return VMOp_UpdateForPopTopFrame; } |
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350 jvmtiError result() { return _result; } |
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351 void doit() { |
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352 JavaThread* jt = _state->get_thread(); |
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353 if (Threads::includes(jt) && !jt->is_exiting() && jt->threadObj() != NULL) { |
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354 _state->update_for_pop_top_frame(); |
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355 } else { |
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356 _result = JVMTI_ERROR_THREAD_NOT_ALIVE; |
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357 } |
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358 } |
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359 }; |
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360 |
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361 // VM operation to set frame pop. |
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362 class VM_SetFramePop : public VM_Operation { |
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363 private: |
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364 JvmtiEnv *_env; |
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365 JvmtiThreadState* _state; |
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366 jint _depth; |
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367 jvmtiError _result; |
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368 |
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369 public: |
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370 VM_SetFramePop(JvmtiEnv *env, JvmtiThreadState* state, jint depth) { |
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371 _env = env; |
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372 _state = state; |
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373 _depth = depth; |
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374 _result = JVMTI_ERROR_NONE; |
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375 } |
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376 // Nested operation must be allowed for the VM_EnterInterpOnlyMode that is |
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377 // called from the JvmtiEventControllerPrivate::recompute_thread_enabled. |
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378 bool allow_nested_vm_operations() const { return true; } |
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379 VMOp_Type type() const { return VMOp_SetFramePop; } |
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380 jvmtiError result() { return _result; } |
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381 void doit() { |
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382 JavaThread* jt = _state->get_thread(); |
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383 if (Threads::includes(jt) && !jt->is_exiting() && jt->threadObj() != NULL) { |
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384 int frame_number = _state->count_frames() - _depth; |
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385 _state->env_thread_state((JvmtiEnvBase*)_env)->set_frame_pop(frame_number); |
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386 } else { |
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387 _result = JVMTI_ERROR_THREAD_NOT_ALIVE; |
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388 } |
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389 } |
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390 }; |
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391 |
| 0 | 392 |
| 393 // VM operation to get monitor information with stack depth. | |
| 394 class VM_GetOwnedMonitorInfo : public VM_Operation { | |
| 395 private: | |
| 396 JvmtiEnv *_env; | |
| 397 JavaThread* _calling_thread; | |
| 398 JavaThread *_java_thread; | |
| 399 jvmtiError _result; | |
| 400 GrowableArray<jvmtiMonitorStackDepthInfo*> *_owned_monitors_list; | |
| 401 | |
| 402 public: | |
| 403 VM_GetOwnedMonitorInfo(JvmtiEnv* env, JavaThread* calling_thread, | |
| 404 JavaThread* java_thread, | |
| 405 GrowableArray<jvmtiMonitorStackDepthInfo*>* owned_monitor_list) { | |
| 406 _env = env; | |
| 407 _calling_thread = calling_thread; | |
| 408 _java_thread = java_thread; | |
| 409 _owned_monitors_list = owned_monitor_list; | |
| 410 _result = JVMTI_ERROR_NONE; | |
| 411 } | |
| 412 VMOp_Type type() const { return VMOp_GetOwnedMonitorInfo; } | |
| 413 void doit() { | |
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414 _result = JVMTI_ERROR_THREAD_NOT_ALIVE; |
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415 if (Threads::includes(_java_thread) && !_java_thread->is_exiting() |
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416 && _java_thread->threadObj() != NULL) { |
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417 _result = ((JvmtiEnvBase *)_env)->get_owned_monitors(_calling_thread, _java_thread, |
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418 _owned_monitors_list); |
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419 } |
| 0 | 420 } |
| 421 jvmtiError result() { return _result; } | |
| 422 }; | |
| 423 | |
| 424 | |
| 425 // VM operation to get object monitor usage. | |
| 426 class VM_GetObjectMonitorUsage : public VM_Operation { | |
| 427 private: | |
| 428 JvmtiEnv *_env; | |
| 429 jobject _object; | |
| 430 JavaThread* _calling_thread; | |
| 431 jvmtiMonitorUsage* _info_ptr; | |
| 432 jvmtiError _result; | |
| 433 | |
| 434 public: | |
| 435 VM_GetObjectMonitorUsage(JvmtiEnv *env, JavaThread* calling_thread, jobject object, jvmtiMonitorUsage* info_ptr) { | |
| 436 _env = env; | |
| 437 _object = object; | |
| 438 _calling_thread = calling_thread; | |
| 439 _info_ptr = info_ptr; | |
| 440 } | |
| 441 VMOp_Type type() const { return VMOp_GetObjectMonitorUsage; } | |
| 442 jvmtiError result() { return _result; } | |
| 443 void doit() { | |
| 444 _result = ((JvmtiEnvBase*) _env)->get_object_monitor_usage(_calling_thread, _object, _info_ptr); | |
| 445 } | |
| 446 | |
| 447 }; | |
| 448 | |
| 449 // VM operation to get current contended monitor. | |
| 450 class VM_GetCurrentContendedMonitor : public VM_Operation { | |
| 451 private: | |
| 452 JvmtiEnv *_env; | |
| 453 JavaThread *_calling_thread; | |
| 454 JavaThread *_java_thread; | |
| 455 jobject *_owned_monitor_ptr; | |
| 456 jvmtiError _result; | |
| 457 | |
| 458 public: | |
| 459 VM_GetCurrentContendedMonitor(JvmtiEnv *env, JavaThread *calling_thread, JavaThread *java_thread, jobject *mon_ptr) { | |
| 460 _env = env; | |
| 461 _calling_thread = calling_thread; | |
| 462 _java_thread = java_thread; | |
| 463 _owned_monitor_ptr = mon_ptr; | |
| 464 } | |
| 465 VMOp_Type type() const { return VMOp_GetCurrentContendedMonitor; } | |
| 466 jvmtiError result() { return _result; } | |
| 467 void doit() { | |
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468 _result = JVMTI_ERROR_THREAD_NOT_ALIVE; |
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469 if (Threads::includes(_java_thread) && !_java_thread->is_exiting() && |
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470 _java_thread->threadObj() != NULL) { |
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471 _result = ((JvmtiEnvBase *)_env)->get_current_contended_monitor(_calling_thread,_java_thread,_owned_monitor_ptr); |
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472 } |
| 0 | 473 } |
| 474 }; | |
| 475 | |
| 476 // VM operation to get stack trace at safepoint. | |
| 477 class VM_GetStackTrace : public VM_Operation { | |
| 478 private: | |
| 479 JvmtiEnv *_env; | |
| 480 JavaThread *_java_thread; | |
| 481 jint _start_depth; | |
| 482 jint _max_count; | |
| 483 jvmtiFrameInfo *_frame_buffer; | |
| 484 jint *_count_ptr; | |
| 485 jvmtiError _result; | |
| 486 | |
| 487 public: | |
| 488 VM_GetStackTrace(JvmtiEnv *env, JavaThread *java_thread, | |
| 489 jint start_depth, jint max_count, | |
| 490 jvmtiFrameInfo* frame_buffer, jint* count_ptr) { | |
| 491 _env = env; | |
| 492 _java_thread = java_thread; | |
| 493 _start_depth = start_depth; | |
| 494 _max_count = max_count; | |
| 495 _frame_buffer = frame_buffer; | |
| 496 _count_ptr = count_ptr; | |
| 497 } | |
| 498 jvmtiError result() { return _result; } | |
| 499 VMOp_Type type() const { return VMOp_GetStackTrace; } | |
| 500 void doit() { | |
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501 _result = JVMTI_ERROR_THREAD_NOT_ALIVE; |
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502 if (Threads::includes(_java_thread) && !_java_thread->is_exiting() |
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503 && _java_thread->threadObj() != NULL) { |
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504 _result = ((JvmtiEnvBase *)_env)->get_stack_trace(_java_thread, |
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505 _start_depth, _max_count, |
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506 _frame_buffer, _count_ptr); |
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507 } |
| 0 | 508 } |
| 509 }; | |
| 510 | |
| 511 // forward declaration | |
| 512 struct StackInfoNode; | |
| 513 | |
| 514 // VM operation to get stack trace at safepoint. | |
| 515 class VM_GetMultipleStackTraces : public VM_Operation { | |
| 516 private: | |
| 517 JvmtiEnv *_env; | |
| 518 jint _max_frame_count; | |
| 519 jvmtiStackInfo *_stack_info; | |
| 520 jvmtiError _result; | |
| 521 int _frame_count_total; | |
| 522 struct StackInfoNode *_head; | |
| 523 | |
| 524 JvmtiEnvBase *env() { return (JvmtiEnvBase *)_env; } | |
| 525 jint max_frame_count() { return _max_frame_count; } | |
| 526 struct StackInfoNode *head() { return _head; } | |
| 527 void set_head(StackInfoNode *head) { _head = head; } | |
| 528 | |
| 529 protected: | |
| 530 void set_result(jvmtiError result) { _result = result; } | |
| 531 void fill_frames(jthread jt, JavaThread *thr, oop thread_oop); | |
| 532 void allocate_and_fill_stacks(jint thread_count); | |
| 533 | |
| 534 public: | |
| 535 VM_GetMultipleStackTraces(JvmtiEnv *env, jint max_frame_count) { | |
| 536 _env = env; | |
| 537 _max_frame_count = max_frame_count; | |
| 538 _frame_count_total = 0; | |
| 539 _head = NULL; | |
| 540 _result = JVMTI_ERROR_NONE; | |
| 541 } | |
| 542 VMOp_Type type() const { return VMOp_GetMultipleStackTraces; } | |
| 543 jvmtiStackInfo *stack_info() { return _stack_info; } | |
| 544 jvmtiError result() { return _result; } | |
| 545 }; | |
| 546 | |
| 547 | |
| 548 // VM operation to get stack trace at safepoint. | |
| 549 class VM_GetAllStackTraces : public VM_GetMultipleStackTraces { | |
| 550 private: | |
| 551 JavaThread *_calling_thread; | |
| 552 jint _final_thread_count; | |
| 553 | |
| 554 public: | |
| 555 VM_GetAllStackTraces(JvmtiEnv *env, JavaThread *calling_thread, | |
| 556 jint max_frame_count) | |
| 557 : VM_GetMultipleStackTraces(env, max_frame_count) { | |
| 558 _calling_thread = calling_thread; | |
| 559 } | |
| 560 VMOp_Type type() const { return VMOp_GetAllStackTraces; } | |
| 561 void doit(); | |
| 562 jint final_thread_count() { return _final_thread_count; } | |
| 563 }; | |
| 564 | |
| 565 // VM operation to get stack trace at safepoint. | |
| 566 class VM_GetThreadListStackTraces : public VM_GetMultipleStackTraces { | |
| 567 private: | |
| 568 jint _thread_count; | |
| 569 const jthread* _thread_list; | |
| 570 | |
| 571 public: | |
| 572 VM_GetThreadListStackTraces(JvmtiEnv *env, jint thread_count, const jthread* thread_list, jint max_frame_count) | |
| 573 : VM_GetMultipleStackTraces(env, max_frame_count) { | |
| 574 _thread_count = thread_count; | |
| 575 _thread_list = thread_list; | |
| 576 } | |
| 577 VMOp_Type type() const { return VMOp_GetThreadListStackTraces; } | |
| 578 void doit(); | |
| 579 }; | |
| 580 | |
| 581 | |
| 582 // VM operation to count stack frames at safepoint. | |
| 583 class VM_GetFrameCount : public VM_Operation { | |
| 584 private: | |
| 585 JvmtiEnv *_env; | |
| 586 JvmtiThreadState *_state; | |
| 587 jint *_count_ptr; | |
| 588 jvmtiError _result; | |
| 589 | |
| 590 public: | |
| 591 VM_GetFrameCount(JvmtiEnv *env, JvmtiThreadState *state, jint *count_ptr) { | |
| 592 _env = env; | |
| 593 _state = state; | |
| 594 _count_ptr = count_ptr; | |
| 595 } | |
| 596 VMOp_Type type() const { return VMOp_GetFrameCount; } | |
| 597 jvmtiError result() { return _result; } | |
| 598 void doit() { | |
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599 _result = JVMTI_ERROR_THREAD_NOT_ALIVE; |
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600 JavaThread* jt = _state->get_thread(); |
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601 if (Threads::includes(jt) && !jt->is_exiting() && jt->threadObj() != NULL) { |
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602 _result = ((JvmtiEnvBase*)_env)->get_frame_count(_state, _count_ptr); |
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603 } |
| 0 | 604 } |
| 605 }; | |
| 606 | |
| 607 // VM operation to frame location at safepoint. | |
| 608 class VM_GetFrameLocation : public VM_Operation { | |
| 609 private: | |
| 610 JvmtiEnv *_env; | |
| 611 JavaThread* _java_thread; | |
| 612 jint _depth; | |
| 613 jmethodID* _method_ptr; | |
| 614 jlocation* _location_ptr; | |
| 615 jvmtiError _result; | |
| 616 | |
| 617 public: | |
| 618 VM_GetFrameLocation(JvmtiEnv *env, JavaThread* java_thread, jint depth, | |
| 619 jmethodID* method_ptr, jlocation* location_ptr) { | |
| 620 _env = env; | |
| 621 _java_thread = java_thread; | |
| 622 _depth = depth; | |
| 623 _method_ptr = method_ptr; | |
| 624 _location_ptr = location_ptr; | |
| 625 } | |
| 626 VMOp_Type type() const { return VMOp_GetFrameLocation; } | |
| 627 jvmtiError result() { return _result; } | |
| 628 void doit() { | |
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629 _result = JVMTI_ERROR_THREAD_NOT_ALIVE; |
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630 if (Threads::includes(_java_thread) && !_java_thread->is_exiting() && |
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631 _java_thread->threadObj() != NULL) { |
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632 _result = ((JvmtiEnvBase*)_env)->get_frame_location(_java_thread, _depth, |
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633 _method_ptr, _location_ptr); |
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634 } |
| 0 | 635 } |
| 636 }; | |
| 637 | |
| 638 | |
| 639 // ResourceTracker | |
| 640 // | |
| 641 // ResourceTracker works a little like a ResourceMark. All allocates | |
| 642 // using the resource tracker are recorded. If an allocate using the | |
| 643 // resource tracker fails the destructor will free any resources | |
| 644 // that were allocated using the tracker. | |
| 645 // The motive for this class is to avoid messy error recovery code | |
| 646 // in situations where multiple allocations are done in sequence. If | |
| 647 // the second or subsequent allocation fails it avoids any code to | |
| 648 // release memory allocated in the previous calls. | |
| 649 // | |
| 650 // Usage :- | |
| 651 // ResourceTracker rt(env); | |
| 652 // : | |
| 653 // err = rt.allocate(1024, &ptr); | |
| 654 | |
| 655 class ResourceTracker : public StackObj { | |
| 656 private: | |
| 657 JvmtiEnv* _env; | |
| 658 GrowableArray<unsigned char*> *_allocations; | |
| 659 bool _failed; | |
| 660 public: | |
| 661 ResourceTracker(JvmtiEnv* env); | |
| 662 ~ResourceTracker(); | |
| 663 jvmtiError allocate(jlong size, unsigned char** mem_ptr); | |
| 664 unsigned char* allocate(jlong size); | |
| 665 char* strdup(const char* str); | |
| 666 }; | |
| 667 | |
| 668 | |
| 669 // Jvmti monitor closure to collect off stack monitors. | |
| 670 class JvmtiMonitorClosure: public MonitorClosure { | |
| 671 private: | |
| 672 JavaThread *_java_thread; | |
| 673 JavaThread *_calling_thread; | |
| 674 GrowableArray<jvmtiMonitorStackDepthInfo*> *_owned_monitors_list; | |
| 675 jvmtiError _error; | |
| 676 JvmtiEnvBase *_env; | |
| 677 | |
| 678 public: | |
| 679 JvmtiMonitorClosure(JavaThread* thread, JavaThread *calling_thread, | |
| 680 GrowableArray<jvmtiMonitorStackDepthInfo*> *owned_monitors, | |
| 681 JvmtiEnvBase *env) { | |
| 682 _java_thread = thread; | |
| 683 _calling_thread = calling_thread; | |
| 684 _owned_monitors_list = owned_monitors; | |
| 685 _error = JVMTI_ERROR_NONE; | |
| 686 _env = env; | |
| 687 } | |
| 688 void do_monitor(ObjectMonitor* mon); | |
| 689 jvmtiError error() { return _error;} | |
| 690 }; | |
| 691 | |
| 1972 | 692 #endif // SHARE_VM_PRIMS_JVMTIENVBASE_HPP |