Mercurial > hg > graal-compiler
view src/share/vm/prims/jvmtiExport.hpp @ 2457:527977d4f740
7033779: CodeCache::largest_free_block may need to hold the CodeCache lock
Reviewed-by: kvn
author | never |
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date | Tue, 05 Apr 2011 19:16:52 -0700 |
parents | f91db74a6810 |
children | f6f3bb0ee072 |
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/* * Copyright (c) 1998, 2011, 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); // posts a DynamicCodeGenerated event (internal/private implementation). // The public post_dynamic_code_generated* functions make use of the // internal implementation. Also called from JvmtiDeferredEvent::post() static void post_dynamic_code_generated_internal(const char *name, const void *code_begin, const void *code_end) KERNEL_RETURN; private: // 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_(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_(NULL); static oop jni_GetField_probe_nh (JavaThread *thread, jobject jobj, oop obj, klassOop klass, jfieldID fieldID, bool is_static) KERNEL_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_(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_(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(Symbol* 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 weak_oops_do(BoolObjectClosure* b, OopClosure* f) KERNEL_RETURN; static void gc_epilogue() 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