Mercurial > hg > truffle
annotate src/share/vm/prims/jvmtiExport.hpp @ 2195:bf8517f4e4d0
6766644: Redefinition of compiled method fails with assertion "Can not load classes with the Compiler thread"
Summary: Defer posting events from the compiler thread: use service thread
Reviewed-by: coleenp, dholmes, never, dcubed
| author | kamg |
|---|---|
| date | Wed, 02 Feb 2011 14:38:01 -0500 |
| parents | 3582bf76420e |
| children | f91db74a6810 |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 1998, 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 #ifndef SHARE_VM_PRIMS_JVMTIEXPORT_HPP |
| 26 #define SHARE_VM_PRIMS_JVMTIEXPORT_HPP | |
| 27 | |
| 28 #include "jvmtifiles/jvmti.h" | |
| 29 #include "memory/allocation.hpp" | |
| 30 #include "memory/iterator.hpp" | |
| 31 #include "oops/oop.hpp" | |
| 32 #include "oops/oopsHierarchy.hpp" | |
| 33 #include "runtime/frame.hpp" | |
| 34 #include "runtime/handles.hpp" | |
| 35 #include "utilities/globalDefinitions.hpp" | |
| 36 #include "utilities/growableArray.hpp" | |
| 0 | 37 |
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38 // Must be included after jvmti.h. |
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39 #include "code/jvmticmlr.h" |
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40 |
| 0 | 41 // Forward declarations |
| 42 | |
| 43 class JvmtiEventControllerPrivate; | |
| 44 class JvmtiManageCapabilities; | |
| 45 class JvmtiEnv; | |
| 46 class JvmtiThreadState; | |
| 47 class AttachOperation; | |
| 48 | |
| 49 #ifndef JVMTI_KERNEL | |
| 50 #define JVMTI_SUPPORT_FLAG(key) \ | |
| 51 private: \ | |
| 52 static bool _##key; \ | |
| 53 public: \ | |
| 54 inline static void set_##key(bool on) { _##key = (on != 0); } \ | |
| 55 inline static bool key() { return _##key; } | |
| 56 #else // JVMTI_KERNEL | |
| 57 #define JVMTI_SUPPORT_FLAG(key) \ | |
| 58 private: \ | |
| 59 const static bool _##key = false; \ | |
| 60 public: \ | |
| 61 inline static void set_##key(bool on) { report_unsupported(on); } \ | |
| 62 inline static bool key() { return _##key; } | |
| 63 #endif // JVMTI_KERNEL | |
| 64 | |
| 65 | |
| 66 // This class contains the JVMTI interface for the rest of hotspot. | |
| 67 // | |
| 68 class JvmtiExport : public AllStatic { | |
| 69 private: | |
| 70 static int _field_access_count; | |
| 71 static int _field_modification_count; | |
| 72 | |
| 73 static bool _can_access_local_variables; | |
| 74 static bool _can_hotswap_or_post_breakpoint; | |
| 75 static bool _can_modify_any_class; | |
| 76 static bool _can_walk_any_space; | |
| 77 | |
| 78 JVMTI_SUPPORT_FLAG(can_get_source_debug_extension) | |
| 79 JVMTI_SUPPORT_FLAG(can_maintain_original_method_order) | |
| 80 JVMTI_SUPPORT_FLAG(can_post_interpreter_events) | |
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81 JVMTI_SUPPORT_FLAG(can_post_on_exceptions) |
| 0 | 82 JVMTI_SUPPORT_FLAG(can_post_breakpoint) |
| 83 JVMTI_SUPPORT_FLAG(can_post_field_access) | |
| 84 JVMTI_SUPPORT_FLAG(can_post_field_modification) | |
| 85 JVMTI_SUPPORT_FLAG(can_post_method_entry) | |
| 86 JVMTI_SUPPORT_FLAG(can_post_method_exit) | |
| 87 JVMTI_SUPPORT_FLAG(can_pop_frame) | |
| 88 JVMTI_SUPPORT_FLAG(can_force_early_return) | |
| 89 | |
| 90 friend class JvmtiEventControllerPrivate; // should only modify these flags | |
| 91 JVMTI_SUPPORT_FLAG(should_post_single_step) | |
| 92 JVMTI_SUPPORT_FLAG(should_post_field_access) | |
| 93 JVMTI_SUPPORT_FLAG(should_post_field_modification) | |
| 94 JVMTI_SUPPORT_FLAG(should_post_class_load) | |
| 95 JVMTI_SUPPORT_FLAG(should_post_class_prepare) | |
| 96 JVMTI_SUPPORT_FLAG(should_post_class_unload) | |
| 97 JVMTI_SUPPORT_FLAG(should_post_native_method_bind) | |
| 98 JVMTI_SUPPORT_FLAG(should_post_compiled_method_load) | |
| 99 JVMTI_SUPPORT_FLAG(should_post_compiled_method_unload) | |
| 100 JVMTI_SUPPORT_FLAG(should_post_dynamic_code_generated) | |
| 101 JVMTI_SUPPORT_FLAG(should_post_monitor_contended_enter) | |
| 102 JVMTI_SUPPORT_FLAG(should_post_monitor_contended_entered) | |
| 103 JVMTI_SUPPORT_FLAG(should_post_monitor_wait) | |
| 104 JVMTI_SUPPORT_FLAG(should_post_monitor_waited) | |
| 105 JVMTI_SUPPORT_FLAG(should_post_data_dump) | |
| 106 JVMTI_SUPPORT_FLAG(should_post_garbage_collection_start) | |
| 107 JVMTI_SUPPORT_FLAG(should_post_garbage_collection_finish) | |
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108 JVMTI_SUPPORT_FLAG(should_post_on_exceptions) |
| 0 | 109 |
| 110 // ------ the below maybe don't have to be (but are for now) | |
| 111 // fixed conditions here ------------ | |
| 112 // any events can be enabled | |
| 113 JVMTI_SUPPORT_FLAG(should_post_thread_life) | |
| 114 JVMTI_SUPPORT_FLAG(should_post_object_free) | |
| 115 JVMTI_SUPPORT_FLAG(should_post_resource_exhausted) | |
| 116 | |
| 117 // we are holding objects on the heap - need to talk to GC - e.g. | |
| 118 // breakpoint info | |
| 119 JVMTI_SUPPORT_FLAG(should_clean_up_heap_objects) | |
| 120 JVMTI_SUPPORT_FLAG(should_post_vm_object_alloc) | |
| 121 | |
| 122 // If flag cannot be implemented, give an error if on=true | |
| 123 static void report_unsupported(bool on); | |
| 124 | |
| 125 // these should only be called by the friend class | |
| 126 friend class JvmtiManageCapabilities; | |
| 127 inline static void set_can_modify_any_class(bool on) { _can_modify_any_class = (on != 0); } | |
| 128 inline static void set_can_access_local_variables(bool on) { _can_access_local_variables = (on != 0); } | |
| 129 inline static void set_can_hotswap_or_post_breakpoint(bool on) { _can_hotswap_or_post_breakpoint = (on != 0); } | |
| 130 inline static void set_can_walk_any_space(bool on) { _can_walk_any_space = (on != 0); } | |
| 131 | |
| 132 enum { | |
| 133 JVMTI_VERSION_MASK = 0x70000000, | |
| 134 JVMTI_VERSION_VALUE = 0x30000000, | |
| 135 JVMDI_VERSION_VALUE = 0x20000000 | |
| 136 }; | |
| 137 | |
| 138 static void post_field_modification(JavaThread *thread, methodOop method, address location, | |
| 139 KlassHandle field_klass, Handle object, jfieldID field, | |
| 140 char sig_type, jvalue *value); | |
| 141 | |
| 142 | |
| 143 private: | |
| 144 // posts a DynamicCodeGenerated event (internal/private implementation). | |
| 145 // The public post_dynamic_code_generated* functions make use of the | |
| 146 // internal implementation. | |
| 147 static void post_dynamic_code_generated_internal(const char *name, const void *code_begin, const void *code_end) KERNEL_RETURN; | |
| 148 | |
| 149 | |
| 150 // GenerateEvents support to allow posting of CompiledMethodLoad and | |
| 151 // DynamicCodeGenerated events for a given environment. | |
| 152 friend class JvmtiCodeBlobEvents; | |
| 153 | |
| 154 static void post_compiled_method_load(JvmtiEnv* env, const jmethodID method, const jint length, | |
| 155 const void *code_begin, const jint map_length, | |
| 156 const jvmtiAddrLocationMap* map) KERNEL_RETURN; | |
| 157 static void post_dynamic_code_generated(JvmtiEnv* env, const char *name, const void *code_begin, | |
| 158 const void *code_end) KERNEL_RETURN; | |
| 159 | |
| 160 // The RedefineClasses() API breaks some invariants in the "regular" | |
| 161 // system. For example, there are sanity checks when GC'ing nmethods | |
| 162 // that require the containing class to be unloading. However, when a | |
| 163 // method is redefined, the old method and nmethod can become GC'able | |
| 164 // without the containing class unloading. The state of becoming | |
| 165 // GC'able can be asynchronous to the RedefineClasses() call since | |
| 166 // the old method may still be running and cannot be GC'ed until | |
| 167 // after all old invocations have finished. Additionally, a method | |
| 168 // that has not been redefined may have an nmethod that depends on | |
| 169 // the redefined method. The dependent nmethod will get deopted in | |
| 170 // this case and may also be GC'able without the containing class | |
| 171 // being unloaded. | |
| 172 // | |
| 173 // This flag indicates whether RedefineClasses() has ever redefined | |
| 174 // one or more classes during the lifetime of the VM. The flag should | |
| 175 // only be set by the friend class and can be queried by other sub | |
| 176 // systems as needed to relax invariant checks. | |
| 177 static bool _has_redefined_a_class; | |
| 178 friend class VM_RedefineClasses; | |
| 179 inline static void set_has_redefined_a_class() { | |
| 180 _has_redefined_a_class = true; | |
| 181 } | |
| 182 | |
| 183 // Flag to indicate if the compiler has recorded all dependencies. When the | |
| 184 // can_redefine_classes capability is enabled in the OnLoad phase then the compiler | |
| 185 // records all dependencies from startup. However if the capability is first | |
| 186 // enabled some time later then the dependencies recorded by the compiler | |
| 187 // are incomplete. This flag is used by RedefineClasses to know if the | |
| 188 // dependency information is complete or not. | |
| 189 static bool _all_dependencies_are_recorded; | |
| 190 | |
| 191 public: | |
| 192 inline static bool has_redefined_a_class() { | |
| 193 return _has_redefined_a_class; | |
| 194 } | |
| 195 | |
| 196 inline static bool all_dependencies_are_recorded() { | |
| 197 return _all_dependencies_are_recorded; | |
| 198 } | |
| 199 | |
| 200 inline static void set_all_dependencies_are_recorded(bool on) { | |
| 201 _all_dependencies_are_recorded = (on != 0); | |
| 202 } | |
| 203 | |
| 204 | |
| 205 // let JVMTI know that the JVM_OnLoad code is running | |
| 206 static void enter_onload_phase(); | |
| 207 | |
| 208 // let JVMTI know that the VM isn't up yet (and JVM_OnLoad code isn't running) | |
| 209 static void enter_primordial_phase(); | |
| 210 | |
| 211 // let JVMTI know that the VM isn't up yet but JNI is live | |
| 212 static void enter_start_phase(); | |
| 213 | |
| 214 // let JVMTI know that the VM is fully up and running now | |
| 215 static void enter_live_phase(); | |
| 216 | |
| 217 // ------ can_* conditions (below) are set at OnLoad and never changed ------------ | |
| 218 inline static bool can_modify_any_class() { return _can_modify_any_class; } | |
| 219 inline static bool can_access_local_variables() { return _can_access_local_variables; } | |
| 220 inline static bool can_hotswap_or_post_breakpoint() { return _can_hotswap_or_post_breakpoint; } | |
| 221 inline static bool can_walk_any_space() { return _can_walk_any_space; } | |
| 222 | |
| 223 // field access management | |
| 224 static address get_field_access_count_addr(); | |
| 225 | |
| 226 // field modification management | |
| 227 static address get_field_modification_count_addr(); | |
| 228 | |
| 229 // ----------------- | |
| 230 | |
| 231 static bool is_jvmti_version(jint version) { return (version & JVMTI_VERSION_MASK) == JVMTI_VERSION_VALUE; } | |
| 232 static bool is_jvmdi_version(jint version) { return (version & JVMTI_VERSION_MASK) == JVMDI_VERSION_VALUE; } | |
| 233 static jint get_jvmti_interface(JavaVM *jvm, void **penv, jint version); | |
| 1121 | 234 static void decode_version_values(jint version, int * major, int * minor, |
| 235 int * micro); | |
| 0 | 236 |
| 237 // single stepping management methods | |
| 238 static void at_single_stepping_point(JavaThread *thread, methodOop method, address location) KERNEL_RETURN; | |
| 239 static void expose_single_stepping(JavaThread *thread) KERNEL_RETURN; | |
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240 static bool hide_single_stepping(JavaThread *thread) KERNEL_RETURN_(false); |
| 0 | 241 |
| 242 // Methods that notify the debugger that something interesting has happened in the VM. | |
| 243 static void post_vm_start (); | |
| 244 static void post_vm_initialized (); | |
| 245 static void post_vm_death (); | |
| 246 | |
| 247 static void post_single_step (JavaThread *thread, methodOop method, address location) KERNEL_RETURN; | |
| 248 static void post_raw_breakpoint (JavaThread *thread, methodOop method, address location) KERNEL_RETURN; | |
| 249 | |
| 250 static void post_exception_throw (JavaThread *thread, methodOop method, address location, oop exception) KERNEL_RETURN; | |
| 251 static void notice_unwind_due_to_exception (JavaThread *thread, methodOop method, address location, oop exception, bool in_handler_frame) KERNEL_RETURN; | |
| 252 | |
| 253 static oop jni_GetField_probe (JavaThread *thread, jobject jobj, | |
| 254 oop obj, klassOop klass, jfieldID fieldID, bool is_static) | |
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255 KERNEL_RETURN_(NULL); |
| 0 | 256 static oop jni_GetField_probe_nh (JavaThread *thread, jobject jobj, |
| 257 oop obj, klassOop klass, jfieldID fieldID, bool is_static) | |
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258 KERNEL_RETURN_(NULL); |
| 0 | 259 static void post_field_access_by_jni (JavaThread *thread, oop obj, |
| 260 klassOop klass, jfieldID fieldID, bool is_static) KERNEL_RETURN; | |
| 261 static void post_field_access (JavaThread *thread, methodOop method, | |
| 262 address location, KlassHandle field_klass, Handle object, jfieldID field) KERNEL_RETURN; | |
| 263 static oop jni_SetField_probe (JavaThread *thread, jobject jobj, | |
| 264 oop obj, klassOop klass, jfieldID fieldID, bool is_static, char sig_type, | |
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265 jvalue *value) KERNEL_RETURN_(NULL); |
| 0 | 266 static oop jni_SetField_probe_nh (JavaThread *thread, jobject jobj, |
| 267 oop obj, klassOop klass, jfieldID fieldID, bool is_static, char sig_type, | |
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268 jvalue *value) KERNEL_RETURN_(NULL); |
| 0 | 269 static void post_field_modification_by_jni(JavaThread *thread, oop obj, |
| 270 klassOop klass, jfieldID fieldID, bool is_static, char sig_type, | |
| 271 jvalue *value); | |
| 272 static void post_raw_field_modification(JavaThread *thread, methodOop method, | |
| 273 address location, KlassHandle field_klass, Handle object, jfieldID field, | |
| 274 char sig_type, jvalue *value) KERNEL_RETURN; | |
| 275 | |
| 276 static void post_method_entry (JavaThread *thread, methodOop method, frame current_frame) KERNEL_RETURN; | |
| 277 static void post_method_exit (JavaThread *thread, methodOop method, frame current_frame) KERNEL_RETURN; | |
| 278 | |
| 279 static void post_class_load (JavaThread *thread, klassOop klass) KERNEL_RETURN; | |
| 280 static void post_class_unload (klassOop klass) KERNEL_RETURN; | |
| 281 static void post_class_prepare (JavaThread *thread, klassOop klass) KERNEL_RETURN; | |
| 282 | |
| 283 static void post_thread_start (JavaThread *thread) KERNEL_RETURN; | |
| 284 static void post_thread_end (JavaThread *thread) KERNEL_RETURN; | |
| 285 | |
| 286 // Support for java.lang.instrument agent loading. | |
| 287 static bool _should_post_class_file_load_hook; | |
| 288 inline static void set_should_post_class_file_load_hook(bool on) { _should_post_class_file_load_hook = on; } | |
| 289 inline static bool should_post_class_file_load_hook() { return _should_post_class_file_load_hook; } | |
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290 static void post_class_file_load_hook(Symbol* h_name, Handle class_loader, |
| 0 | 291 Handle h_protection_domain, |
| 292 unsigned char **data_ptr, unsigned char **end_ptr, | |
| 293 unsigned char **cached_data_ptr, | |
| 294 jint *cached_length_ptr); | |
| 295 static void post_native_method_bind(methodOop method, address* function_ptr) KERNEL_RETURN; | |
| 296 static void post_compiled_method_load(nmethod *nm) KERNEL_RETURN; | |
| 297 static void post_dynamic_code_generated(const char *name, const void *code_begin, const void *code_end) KERNEL_RETURN; | |
| 298 | |
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299 // used to post a CompiledMethodUnload event |
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300 static void post_compiled_method_unload(jmethodID mid, const void *code_begin) KERNEL_RETURN; |
| 0 | 301 |
| 302 // similiar to post_dynamic_code_generated except that it can be used to | |
| 303 // post a DynamicCodeGenerated event while holding locks in the VM. Any event | |
| 304 // posted using this function is recorded by the enclosing event collector | |
| 305 // -- JvmtiDynamicCodeEventCollector. | |
| 306 static void post_dynamic_code_generated_while_holding_locks(const char* name, address code_begin, address code_end) KERNEL_RETURN; | |
| 307 | |
| 308 static void post_garbage_collection_finish() KERNEL_RETURN; | |
| 309 static void post_garbage_collection_start() KERNEL_RETURN; | |
| 310 static void post_data_dump() KERNEL_RETURN; | |
| 311 static void post_monitor_contended_enter(JavaThread *thread, ObjectMonitor *obj_mntr) KERNEL_RETURN; | |
| 312 static void post_monitor_contended_entered(JavaThread *thread, ObjectMonitor *obj_mntr) KERNEL_RETURN; | |
| 313 static void post_monitor_wait(JavaThread *thread, oop obj, jlong timeout) KERNEL_RETURN; | |
| 314 static void post_monitor_waited(JavaThread *thread, ObjectMonitor *obj_mntr, jboolean timed_out) KERNEL_RETURN; | |
| 315 static void post_object_free(JvmtiEnv* env, jlong tag) KERNEL_RETURN; | |
| 316 static void post_resource_exhausted(jint resource_exhausted_flags, const char* detail) KERNEL_RETURN; | |
| 317 static void record_vm_internal_object_allocation(oop object) KERNEL_RETURN; | |
| 318 // Post objects collected by vm_object_alloc_event_collector. | |
| 319 static void post_vm_object_alloc(JavaThread *thread, oop object) KERNEL_RETURN; | |
| 320 // Collects vm internal objects for later event posting. | |
| 321 inline static void vm_object_alloc_event_collector(oop object) { | |
| 322 if (should_post_vm_object_alloc()) { | |
| 323 record_vm_internal_object_allocation(object); | |
| 324 } | |
| 325 } | |
| 326 | |
| 327 static void cleanup_thread (JavaThread* thread) KERNEL_RETURN; | |
| 328 | |
| 329 static void oops_do(OopClosure* f) KERNEL_RETURN; | |
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330 static void weak_oops_do(BoolObjectClosure* b, OopClosure* f) KERNEL_RETURN; |
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331 static void gc_epilogue() KERNEL_RETURN; |
| 0 | 332 |
| 333 static void transition_pending_onload_raw_monitors() KERNEL_RETURN; | |
| 334 | |
| 335 #ifndef SERVICES_KERNEL | |
| 336 // attach support | |
| 337 static jint load_agent_library(AttachOperation* op, outputStream* out); | |
| 338 #endif // SERVICES_KERNEL | |
| 339 | |
| 340 // SetNativeMethodPrefix support | |
| 341 static char** get_all_native_method_prefixes(int* count_ptr); | |
| 342 }; | |
| 343 | |
| 344 // Support class used by JvmtiDynamicCodeEventCollector and others. It | |
| 345 // describes a single code blob by name and address range. | |
| 346 class JvmtiCodeBlobDesc : public CHeapObj { | |
| 347 private: | |
| 348 char _name[64]; | |
| 349 address _code_begin; | |
| 350 address _code_end; | |
| 351 | |
| 352 public: | |
| 353 JvmtiCodeBlobDesc(const char *name, address code_begin, address code_end) { | |
| 354 assert(name != NULL, "all code blobs must be named"); | |
| 355 strncpy(_name, name, sizeof(_name)); | |
| 356 _name[sizeof(_name)-1] = '\0'; | |
| 357 _code_begin = code_begin; | |
| 358 _code_end = code_end; | |
| 359 } | |
| 360 char* name() { return _name; } | |
| 361 address code_begin() { return _code_begin; } | |
| 362 address code_end() { return _code_end; } | |
| 363 }; | |
| 364 | |
| 365 // JvmtiEventCollector is a helper class to setup thread for | |
| 366 // event collection. | |
| 367 class JvmtiEventCollector : public StackObj { | |
| 368 private: | |
| 369 JvmtiEventCollector* _prev; // Save previous one to support nested event collector. | |
| 370 | |
| 371 public: | |
| 372 void setup_jvmti_thread_state(); // Set this collector in current thread. | |
| 373 void unset_jvmti_thread_state(); // Reset previous collector in current thread. | |
| 374 virtual bool is_dynamic_code_event() { return false; } | |
| 375 virtual bool is_vm_object_alloc_event(){ return false; } | |
| 376 JvmtiEventCollector *get_prev() { return _prev; } | |
| 377 }; | |
| 378 | |
| 379 // A JvmtiDynamicCodeEventCollector is a helper class for the JvmtiExport | |
| 380 // interface. It collects "dynamic code generated" events that are posted | |
| 381 // while holding locks. When the event collector goes out of scope the | |
| 382 // events will be posted. | |
| 383 // | |
| 384 // Usage :- | |
| 385 // | |
| 386 // { | |
| 387 // JvmtiDynamicCodeEventCollector event_collector; | |
| 388 // : | |
| 389 // { MutexLocker ml(...) | |
| 390 // : | |
| 391 // JvmtiExport::post_dynamic_code_generated_while_holding_locks(...) | |
| 392 // } | |
| 393 // // event collector goes out of scope => post events to profiler. | |
| 394 // } | |
| 395 | |
| 396 class JvmtiDynamicCodeEventCollector : public JvmtiEventCollector { | |
| 397 private: | |
| 398 GrowableArray<JvmtiCodeBlobDesc*>* _code_blobs; // collected code blob events | |
| 399 | |
| 400 friend class JvmtiExport; | |
| 401 void register_stub(const char* name, address start, address end); | |
| 402 | |
| 403 public: | |
| 404 JvmtiDynamicCodeEventCollector() KERNEL_RETURN; | |
| 405 ~JvmtiDynamicCodeEventCollector() KERNEL_RETURN; | |
| 406 bool is_dynamic_code_event() { return true; } | |
| 407 | |
| 408 }; | |
| 409 | |
| 410 // Used to record vm internally allocated object oops and post | |
| 411 // vm object alloc event for objects visible to java world. | |
| 412 // Constructor enables JvmtiThreadState flag and all vm allocated | |
| 413 // objects are recorded in a growable array. When destructor is | |
| 414 // called the vm object alloc event is posted for each objects | |
| 415 // visible to java world. | |
| 416 // See jvm.cpp file for its usage. | |
| 417 // | |
| 418 class JvmtiVMObjectAllocEventCollector : public JvmtiEventCollector { | |
| 419 private: | |
| 420 GrowableArray<oop>* _allocated; // field to record vm internally allocated object oop. | |
| 421 bool _enable; // This flag is enabled in constructor and disabled | |
| 422 // in destructor before posting event. To avoid | |
| 423 // collection of objects allocated while running java code inside | |
| 424 // agent post_vm_object_alloc() event handler. | |
| 425 | |
| 426 //GC support | |
| 427 void oops_do(OopClosure* f); | |
| 428 | |
| 429 friend class JvmtiExport; | |
| 430 // Record vm allocated object oop. | |
| 431 inline void record_allocation(oop obj); | |
| 432 | |
| 433 //GC support | |
| 434 static void oops_do_for_all_threads(OopClosure* f); | |
| 435 | |
| 436 public: | |
| 437 JvmtiVMObjectAllocEventCollector() KERNEL_RETURN; | |
| 438 ~JvmtiVMObjectAllocEventCollector() KERNEL_RETURN; | |
| 439 bool is_vm_object_alloc_event() { return true; } | |
| 440 | |
| 441 bool is_enabled() { return _enable; } | |
| 442 void set_enabled(bool on) { _enable = on; } | |
| 443 }; | |
| 444 | |
| 445 | |
| 446 | |
| 447 // Marker class to disable the posting of VMObjectAlloc events | |
| 448 // within its scope. | |
| 449 // | |
| 450 // Usage :- | |
| 451 // | |
| 452 // { | |
| 453 // NoJvmtiVMObjectAllocMark njm; | |
| 454 // : | |
| 455 // // VMObjAlloc event will not be posted | |
| 456 // JvmtiExport::vm_object_alloc_event_collector(obj); | |
| 457 // : | |
| 458 // } | |
| 459 | |
| 460 class NoJvmtiVMObjectAllocMark : public StackObj { | |
| 461 private: | |
| 462 // enclosing collector if enabled, NULL otherwise | |
| 463 JvmtiVMObjectAllocEventCollector *_collector; | |
| 464 | |
| 465 bool was_enabled() { return _collector != NULL; } | |
| 466 | |
| 467 public: | |
| 468 NoJvmtiVMObjectAllocMark() KERNEL_RETURN; | |
| 469 ~NoJvmtiVMObjectAllocMark() KERNEL_RETURN; | |
| 470 }; | |
| 471 | |
| 472 | |
| 473 // Base class for reporting GC events to JVMTI. | |
| 474 class JvmtiGCMarker : public StackObj { | |
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475 public: |
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476 JvmtiGCMarker() KERNEL_RETURN; |
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477 ~JvmtiGCMarker() KERNEL_RETURN; |
| 0 | 478 }; |
| 479 | |
| 480 // JvmtiHideSingleStepping is a helper class for hiding | |
| 481 // internal single step events. | |
| 482 class JvmtiHideSingleStepping : public StackObj { | |
| 483 private: | |
| 484 bool _single_step_hidden; | |
| 485 JavaThread * _thread; | |
| 486 | |
| 487 public: | |
| 488 JvmtiHideSingleStepping(JavaThread * thread) { | |
| 489 assert(thread != NULL, "sanity check"); | |
| 490 | |
| 491 _single_step_hidden = false; | |
| 492 _thread = thread; | |
| 493 if (JvmtiExport::should_post_single_step()) { | |
| 494 _single_step_hidden = JvmtiExport::hide_single_stepping(_thread); | |
| 495 } | |
| 496 } | |
| 497 | |
| 498 ~JvmtiHideSingleStepping() { | |
| 499 if (_single_step_hidden) { | |
| 500 JvmtiExport::expose_single_stepping(_thread); | |
| 501 } | |
| 502 } | |
| 503 }; | |
| 504 | |
| 1972 | 505 #endif // SHARE_VM_PRIMS_JVMTIEXPORT_HPP |