Sat, 26 Feb 2011 13:33:23 -0500
7017640: Fix for 6766644 deadlocks on some NSK tests when running with -Xcomp
Summary: Dynamic-code generated events should be deferred and processed by service thread
Reviewed-by: dsamersoff, dcubed
1 /*
2 * Copyright (c) 1998, 2011, Oracle and/or its affiliates. All rights reserved.
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 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
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23 */
25 #ifndef SHARE_VM_PRIMS_JVMTIEXPORT_HPP
26 #define SHARE_VM_PRIMS_JVMTIEXPORT_HPP
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"
38 // Must be included after jvmti.h.
39 #include "code/jvmticmlr.h"
41 // Forward declarations
43 class JvmtiEventControllerPrivate;
44 class JvmtiManageCapabilities;
45 class JvmtiEnv;
46 class JvmtiThreadState;
47 class AttachOperation;
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
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;
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;
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)
81 JVMTI_SUPPORT_FLAG(can_post_on_exceptions)
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)
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)
108 JVMTI_SUPPORT_FLAG(should_post_on_exceptions)
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)
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)
122 // If flag cannot be implemented, give an error if on=true
123 static void report_unsupported(bool on);
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); }
132 enum {
133 JVMTI_VERSION_MASK = 0x70000000,
134 JVMTI_VERSION_VALUE = 0x30000000,
135 JVMDI_VERSION_VALUE = 0x20000000
136 };
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);
143 // posts a DynamicCodeGenerated event (internal/private implementation).
144 // The public post_dynamic_code_generated* functions make use of the
145 // internal implementation. Also called from JvmtiDeferredEvent::post()
146 static void post_dynamic_code_generated_internal(const char *name, const void *code_begin, const void *code_end) KERNEL_RETURN;
148 private:
150 // GenerateEvents support to allow posting of CompiledMethodLoad and
151 // DynamicCodeGenerated events for a given environment.
152 friend class JvmtiCodeBlobEvents;
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;
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 }
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;
191 public:
192 inline static bool has_redefined_a_class() {
193 return _has_redefined_a_class;
194 }
196 inline static bool all_dependencies_are_recorded() {
197 return _all_dependencies_are_recorded;
198 }
200 inline static void set_all_dependencies_are_recorded(bool on) {
201 _all_dependencies_are_recorded = (on != 0);
202 }
205 // let JVMTI know that the JVM_OnLoad code is running
206 static void enter_onload_phase();
208 // let JVMTI know that the VM isn't up yet (and JVM_OnLoad code isn't running)
209 static void enter_primordial_phase();
211 // let JVMTI know that the VM isn't up yet but JNI is live
212 static void enter_start_phase();
214 // let JVMTI know that the VM is fully up and running now
215 static void enter_live_phase();
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; }
223 // field access management
224 static address get_field_access_count_addr();
226 // field modification management
227 static address get_field_modification_count_addr();
229 // -----------------
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);
234 static void decode_version_values(jint version, int * major, int * minor,
235 int * micro);
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;
240 static bool hide_single_stepping(JavaThread *thread) KERNEL_RETURN_(false);
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 ();
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;
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;
253 static oop jni_GetField_probe (JavaThread *thread, jobject jobj,
254 oop obj, klassOop klass, jfieldID fieldID, bool is_static)
255 KERNEL_RETURN_(NULL);
256 static oop jni_GetField_probe_nh (JavaThread *thread, jobject jobj,
257 oop obj, klassOop klass, jfieldID fieldID, bool is_static)
258 KERNEL_RETURN_(NULL);
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,
265 jvalue *value) KERNEL_RETURN_(NULL);
266 static oop jni_SetField_probe_nh (JavaThread *thread, jobject jobj,
267 oop obj, klassOop klass, jfieldID fieldID, bool is_static, char sig_type,
268 jvalue *value) KERNEL_RETURN_(NULL);
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;
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;
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;
283 static void post_thread_start (JavaThread *thread) KERNEL_RETURN;
284 static void post_thread_end (JavaThread *thread) KERNEL_RETURN;
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; }
290 static void post_class_file_load_hook(Symbol* h_name, Handle class_loader,
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;
299 // used to post a CompiledMethodUnload event
300 static void post_compiled_method_unload(jmethodID mid, const void *code_begin) KERNEL_RETURN;
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;
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 }
327 static void cleanup_thread (JavaThread* thread) KERNEL_RETURN;
329 static void oops_do(OopClosure* f) KERNEL_RETURN;
330 static void weak_oops_do(BoolObjectClosure* b, OopClosure* f) KERNEL_RETURN;
331 static void gc_epilogue() KERNEL_RETURN;
333 static void transition_pending_onload_raw_monitors() KERNEL_RETURN;
335 #ifndef SERVICES_KERNEL
336 // attach support
337 static jint load_agent_library(AttachOperation* op, outputStream* out);
338 #endif // SERVICES_KERNEL
340 // SetNativeMethodPrefix support
341 static char** get_all_native_method_prefixes(int* count_ptr);
342 };
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;
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 };
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.
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 };
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 // }
396 class JvmtiDynamicCodeEventCollector : public JvmtiEventCollector {
397 private:
398 GrowableArray<JvmtiCodeBlobDesc*>* _code_blobs; // collected code blob events
400 friend class JvmtiExport;
401 void register_stub(const char* name, address start, address end);
403 public:
404 JvmtiDynamicCodeEventCollector() KERNEL_RETURN;
405 ~JvmtiDynamicCodeEventCollector() KERNEL_RETURN;
406 bool is_dynamic_code_event() { return true; }
408 };
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.
426 //GC support
427 void oops_do(OopClosure* f);
429 friend class JvmtiExport;
430 // Record vm allocated object oop.
431 inline void record_allocation(oop obj);
433 //GC support
434 static void oops_do_for_all_threads(OopClosure* f);
436 public:
437 JvmtiVMObjectAllocEventCollector() KERNEL_RETURN;
438 ~JvmtiVMObjectAllocEventCollector() KERNEL_RETURN;
439 bool is_vm_object_alloc_event() { return true; }
441 bool is_enabled() { return _enable; }
442 void set_enabled(bool on) { _enable = on; }
443 };
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 // }
460 class NoJvmtiVMObjectAllocMark : public StackObj {
461 private:
462 // enclosing collector if enabled, NULL otherwise
463 JvmtiVMObjectAllocEventCollector *_collector;
465 bool was_enabled() { return _collector != NULL; }
467 public:
468 NoJvmtiVMObjectAllocMark() KERNEL_RETURN;
469 ~NoJvmtiVMObjectAllocMark() KERNEL_RETURN;
470 };
473 // Base class for reporting GC events to JVMTI.
474 class JvmtiGCMarker : public StackObj {
475 public:
476 JvmtiGCMarker() KERNEL_RETURN;
477 ~JvmtiGCMarker() KERNEL_RETURN;
478 };
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;
487 public:
488 JvmtiHideSingleStepping(JavaThread * thread) {
489 assert(thread != NULL, "sanity check");
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 }
498 ~JvmtiHideSingleStepping() {
499 if (_single_step_hidden) {
500 JvmtiExport::expose_single_stepping(_thread);
501 }
502 }
503 };
505 #endif // SHARE_VM_PRIMS_JVMTIEXPORT_HPP