jdk8-mips64-public/hotspot: src/share/vm/prims/jvmtiExport.hpp@7246a374a9f2 (annotated)

src/share/vm/prims/jvmtiExport.hpp@7246a374a9f2 (annotated)

src/share/vm/prims/jvmtiExport.hpp

Mon, 10 Jan 2011 17:14:53 -0500

author: kamg
date: Mon, 10 Jan 2011 17:14:53 -0500
changeset 2445: 7246a374a9f2
parent 2325: c760f78e0a53
child 2467: 9afee0b9fc1d
permissions: -rw-r--r--

6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
Summary: Make JvmtiGCMark safe to run non-safepoint and instrument CMS
Reviewed-by: ysr, dcubed

 /*
  * Copyright (c) 1998, 2010, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.
  *
  * This code is distributed in the hope that it will be useful, but WITHOUT
  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  * version 2 for more details (a copy is included in the LICENSE file that
  * accompanied this code).
  *
  * You should have received a copy of the GNU General Public License version
  * 2 along with this work; if not, write to the Free Software Foundation,
  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  *
  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  * or visit www.oracle.com if you need additional information or have any
  * questions.
  *
  */
 #ifndef SHARE_VM_PRIMS_JVMTIEXPORT_HPP
 #define SHARE_VM_PRIMS_JVMTIEXPORT_HPP
 #include "jvmtifiles/jvmti.h"
 #include "memory/allocation.hpp"
 #include "memory/iterator.hpp"
 #include "oops/oop.hpp"
 #include "oops/oopsHierarchy.hpp"
 #include "runtime/frame.hpp"
 #include "runtime/handles.hpp"
 #include "utilities/globalDefinitions.hpp"
 #include "utilities/growableArray.hpp"
 // Must be included after jvmti.h.
 #include "code/jvmticmlr.h"
 // Forward declarations
 class JvmtiEventControllerPrivate;
 class JvmtiManageCapabilities;
 class JvmtiEnv;
 class JvmtiThreadState;
 class AttachOperation;
 #ifndef JVMTI_KERNEL
 #define JVMTI_SUPPORT_FLAG(key)                                         \
   private:                                                              \
   static bool  _##key;                                                  \
   public:                                                               \
   inline static void set_##key(bool on)       { _##key = (on != 0); }   \
   inline static bool key()                    { return _##key; }
 #else  // JVMTI_KERNEL
 #define JVMTI_SUPPORT_FLAG(key)                                           \
   private:                                                                \
   const static bool _##key = false;                                       \
   public:                                                                 \
   inline static void set_##key(bool on)       { report_unsupported(on); } \
   inline static bool key()                    { return _##key; }
 #endif // JVMTI_KERNEL
 // This class contains the JVMTI interface for the rest of hotspot.
 //
 class JvmtiExport : public AllStatic {
  private:
   static int         _field_access_count;
   static int         _field_modification_count;
   static bool        _can_access_local_variables;
   static bool        _can_hotswap_or_post_breakpoint;
   static bool        _can_modify_any_class;
   static bool        _can_walk_any_space;
   JVMTI_SUPPORT_FLAG(can_get_source_debug_extension)
   JVMTI_SUPPORT_FLAG(can_maintain_original_method_order)
   JVMTI_SUPPORT_FLAG(can_post_interpreter_events)
   JVMTI_SUPPORT_FLAG(can_post_on_exceptions)
   JVMTI_SUPPORT_FLAG(can_post_breakpoint)
   JVMTI_SUPPORT_FLAG(can_post_field_access)
   JVMTI_SUPPORT_FLAG(can_post_field_modification)
   JVMTI_SUPPORT_FLAG(can_post_method_entry)
   JVMTI_SUPPORT_FLAG(can_post_method_exit)
   JVMTI_SUPPORT_FLAG(can_pop_frame)
   JVMTI_SUPPORT_FLAG(can_force_early_return)
   friend class JvmtiEventControllerPrivate;  // should only modify these flags
   JVMTI_SUPPORT_FLAG(should_post_single_step)
   JVMTI_SUPPORT_FLAG(should_post_field_access)
   JVMTI_SUPPORT_FLAG(should_post_field_modification)
   JVMTI_SUPPORT_FLAG(should_post_class_load)
   JVMTI_SUPPORT_FLAG(should_post_class_prepare)
   JVMTI_SUPPORT_FLAG(should_post_class_unload)
   JVMTI_SUPPORT_FLAG(should_post_native_method_bind)
   JVMTI_SUPPORT_FLAG(should_post_compiled_method_load)
   JVMTI_SUPPORT_FLAG(should_post_compiled_method_unload)
   JVMTI_SUPPORT_FLAG(should_post_dynamic_code_generated)
   JVMTI_SUPPORT_FLAG(should_post_monitor_contended_enter)
   JVMTI_SUPPORT_FLAG(should_post_monitor_contended_entered)
   JVMTI_SUPPORT_FLAG(should_post_monitor_wait)
   JVMTI_SUPPORT_FLAG(should_post_monitor_waited)
   JVMTI_SUPPORT_FLAG(should_post_data_dump)
   JVMTI_SUPPORT_FLAG(should_post_garbage_collection_start)
   JVMTI_SUPPORT_FLAG(should_post_garbage_collection_finish)
   JVMTI_SUPPORT_FLAG(should_post_on_exceptions)
   // ------ the below maybe don't have to be (but are for now)
   // fixed conditions here ------------
   // any events can be enabled
   JVMTI_SUPPORT_FLAG(should_post_thread_life)
   JVMTI_SUPPORT_FLAG(should_post_object_free)
   JVMTI_SUPPORT_FLAG(should_post_resource_exhausted)
   // we are holding objects on the heap - need to talk to GC - e.g.
   // breakpoint info
   JVMTI_SUPPORT_FLAG(should_clean_up_heap_objects)
   JVMTI_SUPPORT_FLAG(should_post_vm_object_alloc)
   // If flag cannot be implemented, give an error if on=true
   static void report_unsupported(bool on);
   // these should only be called by the friend class
   friend class JvmtiManageCapabilities;
   inline static void set_can_modify_any_class(bool on)                 { _can_modify_any_class = (on != 0); }
   inline static void set_can_access_local_variables(bool on)           { _can_access_local_variables = (on != 0); }
   inline static void set_can_hotswap_or_post_breakpoint(bool on)       { _can_hotswap_or_post_breakpoint = (on != 0); }
   inline static void set_can_walk_any_space(bool on)                   { _can_walk_any_space = (on != 0); }
   enum {
     JVMTI_VERSION_MASK   = 0x70000000,
     JVMTI_VERSION_VALUE  = 0x30000000,
     JVMDI_VERSION_VALUE  = 0x20000000
   };
   static void post_field_modification(JavaThread *thread, methodOop method, address location,
                                       KlassHandle field_klass, Handle object, jfieldID field,
                                       char sig_type, jvalue *value);
  private:
   // CompiledMethodUnload events are reported from the VM thread so they
   // are collected in lists (of jmethodID/addresses) and the events are posted later
   // from threads posting CompieldMethodLoad or DynamicCodeGenerated events.
   static bool _have_pending_compiled_method_unload_events;
   static GrowableArray<jmethodID>* _pending_compiled_method_unload_method_ids;
   static GrowableArray<const void *>* _pending_compiled_method_unload_code_begins;
   static JavaThread* _current_poster;
   // tests if there are CompiledMethodUnload events pending
   inline static bool have_pending_compiled_method_unload_events() {
     return _have_pending_compiled_method_unload_events;
   }
   // posts any pending CompiledMethodUnload events.
   static void post_pending_compiled_method_unload_events();
   // Perform the actual notification to interested JvmtiEnvs.
   static void post_compiled_method_unload_internal(JavaThread* self, jmethodID mid, const void* code_begin);
   // posts a DynamicCodeGenerated event (internal/private implementation).
   // The public post_dynamic_code_generated* functions make use of the
   // internal implementation.
   static void post_dynamic_code_generated_internal(const char *name, const void *code_begin, const void *code_end) KERNEL_RETURN;
   // GenerateEvents support to allow posting of CompiledMethodLoad and
   // DynamicCodeGenerated events for a given environment.
   friend class JvmtiCodeBlobEvents;
   static void post_compiled_method_load(JvmtiEnv* env, const jmethodID method, const jint length,
                                         const void *code_begin, const jint map_length,
                                         const jvmtiAddrLocationMap* map) KERNEL_RETURN;
   static void post_dynamic_code_generated(JvmtiEnv* env, const char *name, const void *code_begin,
                                           const void *code_end) KERNEL_RETURN;
   // The RedefineClasses() API breaks some invariants in the "regular"
   // system. For example, there are sanity checks when GC'ing nmethods
   // that require the containing class to be unloading. However, when a
   // method is redefined, the old method and nmethod can become GC'able
   // without the containing class unloading. The state of becoming
   // GC'able can be asynchronous to the RedefineClasses() call since
   // the old method may still be running and cannot be GC'ed until
   // after all old invocations have finished. Additionally, a method
   // that has not been redefined may have an nmethod that depends on
   // the redefined method. The dependent nmethod will get deopted in
   // this case and may also be GC'able without the containing class
   // being unloaded.
   //
   // This flag indicates whether RedefineClasses() has ever redefined
   // one or more classes during the lifetime of the VM. The flag should
   // only be set by the friend class and can be queried by other sub
   // systems as needed to relax invariant checks.
   static bool _has_redefined_a_class;
   friend class VM_RedefineClasses;
   inline static void set_has_redefined_a_class() {
     _has_redefined_a_class = true;
   }
   // Flag to indicate if the compiler has recorded all dependencies. When the
   // can_redefine_classes capability is enabled in the OnLoad phase then the compiler
   // records all dependencies from startup. However if the capability is first
   // enabled some time later then the dependencies recorded by the compiler
   // are incomplete. This flag is used by RedefineClasses to know if the
   // dependency information is complete or not.
   static bool _all_dependencies_are_recorded;
  public:
   inline static bool has_redefined_a_class() {
     return _has_redefined_a_class;
   }
   inline static bool all_dependencies_are_recorded() {
     return _all_dependencies_are_recorded;
   }
   inline static void set_all_dependencies_are_recorded(bool on) {
     _all_dependencies_are_recorded = (on != 0);
   }
   // let JVMTI know that the JVM_OnLoad code is running
   static void enter_onload_phase();
   // let JVMTI know that the VM isn't up yet (and JVM_OnLoad code isn't running)
   static void enter_primordial_phase();
   // let JVMTI know that the VM isn't up yet but JNI is live
   static void enter_start_phase();
   // let JVMTI know that the VM is fully up and running now
   static void enter_live_phase();
   // ------ can_* conditions (below) are set at OnLoad and never changed ------------
   inline static bool can_modify_any_class()                       { return _can_modify_any_class; }
   inline static bool can_access_local_variables()                 { return _can_access_local_variables; }
   inline static bool can_hotswap_or_post_breakpoint()             { return _can_hotswap_or_post_breakpoint; }
   inline static bool can_walk_any_space()                         { return _can_walk_any_space; }
   // field access management
   static address  get_field_access_count_addr();
   // field modification management
   static address  get_field_modification_count_addr();
   // -----------------
   static bool is_jvmti_version(jint version)                      { return (version & JVMTI_VERSION_MASK) == JVMTI_VERSION_VALUE; }
   static bool is_jvmdi_version(jint version)                      { return (version & JVMTI_VERSION_MASK) == JVMDI_VERSION_VALUE; }
   static jint get_jvmti_interface(JavaVM *jvm, void **penv, jint version);
   static void decode_version_values(jint version, int * major, int * minor,
                                     int * micro);
   // single stepping management methods
   static void at_single_stepping_point(JavaThread *thread, methodOop method, address location) KERNEL_RETURN;
   static void expose_single_stepping(JavaThread *thread) KERNEL_RETURN;
   static bool hide_single_stepping(JavaThread *thread) KERNEL_RETURN_(return false;);
   // Methods that notify the debugger that something interesting has happened in the VM.
   static void post_vm_start              ();
   static void post_vm_initialized        ();
   static void post_vm_death              ();
   static void post_single_step           (JavaThread *thread, methodOop method, address location) KERNEL_RETURN;
   static void post_raw_breakpoint        (JavaThread *thread, methodOop method, address location) KERNEL_RETURN;
   static void post_exception_throw       (JavaThread *thread, methodOop method, address location, oop exception) KERNEL_RETURN;
   static void notice_unwind_due_to_exception (JavaThread *thread, methodOop method, address location, oop exception, bool in_handler_frame) KERNEL_RETURN;
   static oop jni_GetField_probe          (JavaThread *thread, jobject jobj,
     oop obj, klassOop klass, jfieldID fieldID, bool is_static)
     KERNEL_RETURN_(return NULL;);
   static oop jni_GetField_probe_nh       (JavaThread *thread, jobject jobj,
     oop obj, klassOop klass, jfieldID fieldID, bool is_static)
     KERNEL_RETURN_(return NULL;);
   static void post_field_access_by_jni   (JavaThread *thread, oop obj,
     klassOop klass, jfieldID fieldID, bool is_static) KERNEL_RETURN;
   static void post_field_access          (JavaThread *thread, methodOop method,
     address location, KlassHandle field_klass, Handle object, jfieldID field) KERNEL_RETURN;
   static oop jni_SetField_probe          (JavaThread *thread, jobject jobj,
     oop obj, klassOop klass, jfieldID fieldID, bool is_static, char sig_type,
     jvalue *value) KERNEL_RETURN_(return NULL;);
   static oop jni_SetField_probe_nh       (JavaThread *thread, jobject jobj,
     oop obj, klassOop klass, jfieldID fieldID, bool is_static, char sig_type,
     jvalue *value) KERNEL_RETURN_(return NULL;);
   static void post_field_modification_by_jni(JavaThread *thread, oop obj,
     klassOop klass, jfieldID fieldID, bool is_static, char sig_type,
     jvalue *value);
   static void post_raw_field_modification(JavaThread *thread, methodOop method,
     address location, KlassHandle field_klass, Handle object, jfieldID field,
     char sig_type, jvalue *value) KERNEL_RETURN;
   static void post_method_entry          (JavaThread *thread, methodOop method, frame current_frame) KERNEL_RETURN;
   static void post_method_exit           (JavaThread *thread, methodOop method, frame current_frame) KERNEL_RETURN;
   static void post_class_load            (JavaThread *thread, klassOop klass) KERNEL_RETURN;
   static void post_class_unload          (klassOop klass) KERNEL_RETURN;
   static void post_class_prepare         (JavaThread *thread, klassOop klass) KERNEL_RETURN;
   static void post_thread_start          (JavaThread *thread) KERNEL_RETURN;
   static void post_thread_end            (JavaThread *thread) KERNEL_RETURN;
   // Support for java.lang.instrument agent loading.
   static bool _should_post_class_file_load_hook;
   inline static void set_should_post_class_file_load_hook(bool on)     { _should_post_class_file_load_hook = on;  }
   inline static bool should_post_class_file_load_hook()           { return _should_post_class_file_load_hook; }
   static void post_class_file_load_hook(symbolHandle h_name, Handle class_loader,
                                         Handle h_protection_domain,
                                         unsigned char **data_ptr, unsigned char **end_ptr,
                                         unsigned char **cached_data_ptr,
                                         jint *cached_length_ptr);
   static void post_native_method_bind(methodOop method, address* function_ptr) KERNEL_RETURN;
   static void post_compiled_method_load(nmethod *nm) KERNEL_RETURN;
   static void post_dynamic_code_generated(const char *name, const void *code_begin, const void *code_end) KERNEL_RETURN;
   // used to post a CompiledMethodUnload event
   static void post_compiled_method_unload(jmethodID mid, const void *code_begin) KERNEL_RETURN;
   // similiar to post_dynamic_code_generated except that it can be used to
   // post a DynamicCodeGenerated event while holding locks in the VM. Any event
   // posted using this function is recorded by the enclosing event collector
   // -- JvmtiDynamicCodeEventCollector.
   static void post_dynamic_code_generated_while_holding_locks(const char* name, address code_begin, address code_end) KERNEL_RETURN;
   static void post_garbage_collection_finish() KERNEL_RETURN;
   static void post_garbage_collection_start() KERNEL_RETURN;
   static void post_data_dump() KERNEL_RETURN;
   static void post_monitor_contended_enter(JavaThread *thread, ObjectMonitor *obj_mntr) KERNEL_RETURN;
   static void post_monitor_contended_entered(JavaThread *thread, ObjectMonitor *obj_mntr) KERNEL_RETURN;
   static void post_monitor_wait(JavaThread *thread, oop obj, jlong timeout) KERNEL_RETURN;
   static void post_monitor_waited(JavaThread *thread, ObjectMonitor *obj_mntr, jboolean timed_out) KERNEL_RETURN;
   static void post_object_free(JvmtiEnv* env, jlong tag) KERNEL_RETURN;
   static void post_resource_exhausted(jint resource_exhausted_flags, const char* detail) KERNEL_RETURN;
   static void record_vm_internal_object_allocation(oop object) KERNEL_RETURN;
   // Post objects collected by vm_object_alloc_event_collector.
   static void post_vm_object_alloc(JavaThread *thread, oop object) KERNEL_RETURN;
   // Collects vm internal objects for later event posting.
   inline static void vm_object_alloc_event_collector(oop object) {
     if (should_post_vm_object_alloc()) {
       record_vm_internal_object_allocation(object);
     }
   }
   static void cleanup_thread             (JavaThread* thread) KERNEL_RETURN;
   static void oops_do(OopClosure* f) KERNEL_RETURN;
   static void transition_pending_onload_raw_monitors() KERNEL_RETURN;
 #ifndef SERVICES_KERNEL
   // attach support
   static jint load_agent_library(AttachOperation* op, outputStream* out);
 #endif // SERVICES_KERNEL
   // SetNativeMethodPrefix support
   static char** get_all_native_method_prefixes(int* count_ptr);
 };
 // Support class used by JvmtiDynamicCodeEventCollector and others. It
 // describes a single code blob by name and address range.
 class JvmtiCodeBlobDesc : public CHeapObj {
  private:
   char _name[64];
   address _code_begin;
   address _code_end;
  public:
   JvmtiCodeBlobDesc(const char *name, address code_begin, address code_end) {
     assert(name != NULL, "all code blobs must be named");
     strncpy(_name, name, sizeof(_name));
     _name[sizeof(_name)-1] = '\0';
     _code_begin = code_begin;
     _code_end = code_end;
   }
   char* name()                  { return _name; }
   address code_begin()          { return _code_begin; }
   address code_end()            { return _code_end; }
 };
 // JvmtiEventCollector is a helper class to setup thread for
 // event collection.
 class JvmtiEventCollector : public StackObj {
  private:
   JvmtiEventCollector* _prev;  // Save previous one to support nested event collector.
  public:
   void setup_jvmti_thread_state(); // Set this collector in current thread.
   void unset_jvmti_thread_state(); // Reset previous collector in current thread.
   virtual bool is_dynamic_code_event()   { return false; }
   virtual bool is_vm_object_alloc_event(){ return false; }
   JvmtiEventCollector *get_prev()        { return _prev; }
 };
 // A JvmtiDynamicCodeEventCollector is a helper class for the JvmtiExport
 // interface. It collects "dynamic code generated" events that are posted
 // while holding locks. When the event collector goes out of scope the
 // events will be posted.
 //
 // Usage :-
 //
 // {
 //   JvmtiDynamicCodeEventCollector event_collector;
 //   :
 //   { MutexLocker ml(...)
 //     :
 //     JvmtiExport::post_dynamic_code_generated_while_holding_locks(...)
 //   }
 //   // event collector goes out of scope => post events to profiler.
 // }
 class JvmtiDynamicCodeEventCollector : public JvmtiEventCollector {
  private:
   GrowableArray<JvmtiCodeBlobDesc*>* _code_blobs;           // collected code blob events
   friend class JvmtiExport;
   void register_stub(const char* name, address start, address end);
  public:
   JvmtiDynamicCodeEventCollector()  KERNEL_RETURN;
   ~JvmtiDynamicCodeEventCollector() KERNEL_RETURN;
   bool is_dynamic_code_event()   { return true; }
 };
 // Used to record vm internally allocated object oops and post
 // vm object alloc event for objects visible to java world.
 // Constructor enables JvmtiThreadState flag and all vm allocated
 // objects are recorded in a growable array. When destructor is
 // called the vm object alloc event is posted for each objects
 // visible to java world.
 // See jvm.cpp file for its usage.
 //
 class JvmtiVMObjectAllocEventCollector : public JvmtiEventCollector {
  private:
   GrowableArray<oop>* _allocated; // field to record vm internally allocated object oop.
   bool _enable;                   // This flag is enabled in constructor and disabled
                                   // in destructor before posting event. To avoid
                                   // collection of objects allocated while running java code inside
                                   // agent post_vm_object_alloc() event handler.
   //GC support
   void oops_do(OopClosure* f);
   friend class JvmtiExport;
   // Record vm allocated object oop.
   inline void record_allocation(oop obj);
   //GC support
   static void oops_do_for_all_threads(OopClosure* f);
  public:
   JvmtiVMObjectAllocEventCollector()  KERNEL_RETURN;
   ~JvmtiVMObjectAllocEventCollector() KERNEL_RETURN;
   bool is_vm_object_alloc_event()   { return true; }
   bool is_enabled()                 { return _enable; }
   void set_enabled(bool on)         { _enable = on; }
 };
 // Marker class to disable the posting of VMObjectAlloc events
 // within its scope.
 //
 // Usage :-
 //
 // {
 //   NoJvmtiVMObjectAllocMark njm;
 //   :
 //   // VMObjAlloc event will not be posted
 //   JvmtiExport::vm_object_alloc_event_collector(obj);
 //   :
 // }
 class NoJvmtiVMObjectAllocMark : public StackObj {
  private:
   // enclosing collector if enabled, NULL otherwise
   JvmtiVMObjectAllocEventCollector *_collector;
   bool was_enabled()    { return _collector != NULL; }
  public:
   NoJvmtiVMObjectAllocMark() KERNEL_RETURN;
   ~NoJvmtiVMObjectAllocMark() KERNEL_RETURN;
 };
 // Base class for reporting GC events to JVMTI.
 class JvmtiGCMarker : public StackObj {
  public:
   JvmtiGCMarker() KERNEL_RETURN;
   ~JvmtiGCMarker() KERNEL_RETURN;
 };
 // JvmtiHideSingleStepping is a helper class for hiding
 // internal single step events.
 class JvmtiHideSingleStepping : public StackObj {
  private:
   bool         _single_step_hidden;
   JavaThread * _thread;
  public:
   JvmtiHideSingleStepping(JavaThread * thread) {
     assert(thread != NULL, "sanity check");
     _single_step_hidden = false;
     _thread = thread;
     if (JvmtiExport::should_post_single_step()) {
       _single_step_hidden = JvmtiExport::hide_single_stepping(_thread);
     }
   }
   ~JvmtiHideSingleStepping() {
     if (_single_step_hidden) {
       JvmtiExport::expose_single_stepping(_thread);
     }
   }
 };
 #endif // SHARE_VM_PRIMS_JVMTIEXPORT_HPP

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/prims/jvmtiExport.hpp@7246a374a9f2 (annotated)

src/share/vm/prims/jvmtiExport.hpp