| /* |
| * Copyright (c) 2003, 2017, 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_JVMTIENVBASE_HPP |
| #define SHARE_VM_PRIMS_JVMTIENVBASE_HPP |
| |
| #include "classfile/classLoader.hpp" |
| #include "prims/jvmtiEnvThreadState.hpp" |
| #include "prims/jvmtiEventController.hpp" |
| #include "prims/jvmtiThreadState.hpp" |
| #include "prims/jvmtiThreadState.inline.hpp" |
| #include "oops/oopHandle.hpp" |
| #include "runtime/fieldDescriptor.hpp" |
| #include "runtime/frame.hpp" |
| #include "runtime/handles.inline.hpp" |
| #include "runtime/thread.hpp" |
| #include "runtime/vm_operations.hpp" |
| #include "utilities/growableArray.hpp" |
| #include "utilities/macros.hpp" |
| |
| // |
| // Forward Declarations |
| // |
| |
| class JvmtiEnv; |
| class JvmtiThreadState; |
| class JvmtiRawMonitor; // for jvmtiEnv.hpp |
| class JvmtiEventControllerPrivate; |
| class JvmtiTagMap; |
| |
| |
| |
| // One JvmtiEnv object is created per jvmti attachment; |
| // done via JNI GetEnv() call. Multiple attachments are |
| // allowed in jvmti. |
| |
| class JvmtiEnvBase : public CHeapObj<mtInternal> { |
| |
| private: |
| |
| #if INCLUDE_JVMTI |
| static JvmtiEnvBase* _head_environment; // head of environment list |
| #endif // INCLUDE_JVMTI |
| |
| static bool _globally_initialized; |
| static jvmtiPhase _phase; |
| static volatile int _dying_thread_env_iteration_count; |
| |
| public: |
| |
| enum { |
| JDK15_JVMTI_VERSION = JVMTI_VERSION_1_0 + 33, /* version: 1.0.33 */ |
| JDK16_JVMTI_VERSION = JVMTI_VERSION_1_1 + 102, /* version: 1.1.102 */ |
| JDK17_JVMTI_VERSION = JVMTI_VERSION_1_2 + 2 /* version: 1.2.2 */ |
| }; |
| |
| static jvmtiPhase get_phase() { return _phase; } |
| static jvmtiPhase get_phase(jvmtiEnv* env) { return ((JvmtiEnvBase*)JvmtiEnv_from_jvmti_env(env))->phase(); } |
| static void set_phase(jvmtiPhase phase) { _phase = phase; } |
| static bool is_vm_live() { return _phase == JVMTI_PHASE_LIVE; } |
| |
| static void entering_dying_thread_env_iteration() { ++_dying_thread_env_iteration_count; } |
| static void leaving_dying_thread_env_iteration() { --_dying_thread_env_iteration_count; } |
| static bool is_inside_dying_thread_env_iteration(){ return _dying_thread_env_iteration_count > 0; } |
| |
| private: |
| |
| enum { |
| JVMTI_MAGIC = 0x71EE, |
| DISPOSED_MAGIC = 0xDEFC, |
| BAD_MAGIC = 0xDEAD |
| }; |
| |
| jvmtiEnv _jvmti_external; |
| jint _magic; |
| jint _version; // version value passed to JNI GetEnv() |
| JvmtiEnvBase* _next; |
| bool _is_retransformable; |
| const void *_env_local_storage; // per env agent allocated data. |
| jvmtiEventCallbacks _event_callbacks; |
| jvmtiExtEventCallbacks _ext_event_callbacks; |
| JvmtiTagMap* _tag_map; |
| JvmtiEnvEventEnable _env_event_enable; |
| jvmtiCapabilities _current_capabilities; |
| jvmtiCapabilities _prohibited_capabilities; |
| volatile bool _class_file_load_hook_ever_enabled; |
| static volatile bool _needs_clean_up; |
| char** _native_method_prefixes; |
| int _native_method_prefix_count; |
| |
| protected: |
| JvmtiEnvBase(jint version); |
| ~JvmtiEnvBase(); |
| void dispose(); |
| void env_dispose(); |
| |
| void set_env_local_storage(const void* data) { _env_local_storage = data; } |
| const void* get_env_local_storage() { return _env_local_storage; } |
| |
| void record_class_file_load_hook_enabled(); |
| void record_first_time_class_file_load_hook_enabled(); |
| |
| char** get_native_method_prefixes() { return _native_method_prefixes; } |
| int get_native_method_prefix_count() { return _native_method_prefix_count; } |
| jvmtiError set_native_method_prefixes(jint prefix_count, char** prefixes); |
| |
| private: |
| friend class JvmtiEventControllerPrivate; |
| void initialize(); |
| void set_event_callbacks(const jvmtiEventCallbacks* callbacks, jint size_of_callbacks); |
| static void globally_initialize(); |
| static void periodic_clean_up(); |
| |
| friend class JvmtiEnvIterator; |
| JvmtiEnv* next_environment() { return (JvmtiEnv*)_next; } |
| void set_next_environment(JvmtiEnvBase* env) { _next = env; } |
| static JvmtiEnv* head_environment() { |
| JVMTI_ONLY(return (JvmtiEnv*)_head_environment); |
| NOT_JVMTI(return NULL); |
| } |
| |
| public: |
| |
| jvmtiPhase phase(); |
| bool is_valid(); |
| |
| bool use_version_1_0_semantics(); // agent asked for version 1.0 |
| bool use_version_1_1_semantics(); // agent asked for version 1.1 |
| bool use_version_1_2_semantics(); // agent asked for version 1.2 |
| |
| bool is_retransformable() { return _is_retransformable; } |
| |
| static ByteSize jvmti_external_offset() { |
| return byte_offset_of(JvmtiEnvBase, _jvmti_external); |
| }; |
| |
| static JvmtiEnv* JvmtiEnv_from_jvmti_env(jvmtiEnv *env) { |
| return (JvmtiEnv*)((intptr_t)env - in_bytes(jvmti_external_offset())); |
| }; |
| |
| jvmtiCapabilities *get_capabilities() { return &_current_capabilities; } |
| |
| jvmtiCapabilities *get_prohibited_capabilities() { return &_prohibited_capabilities; } |
| |
| bool early_class_hook_env() { |
| return get_capabilities()->can_generate_early_class_hook_events != 0 |
| && get_capabilities()->can_generate_all_class_hook_events != 0; |
| } |
| |
| bool early_vmstart_env() { |
| return get_capabilities()->can_generate_early_vmstart != 0; |
| } |
| |
| static char** get_all_native_method_prefixes(int* count_ptr); |
| |
| // This test will answer true when all environments have been disposed and some have |
| // not yet been deallocated. As a result, this test should only be used as an |
| // optimization for the no environment case. |
| static bool environments_might_exist() { |
| return head_environment() != NULL; |
| } |
| |
| static void check_for_periodic_clean_up(); |
| |
| JvmtiEnvEventEnable *env_event_enable() { |
| return &_env_event_enable; |
| } |
| |
| jvmtiError allocate(jlong size, unsigned char** mem_ptr) { |
| if (size < 0) { |
| return JVMTI_ERROR_ILLEGAL_ARGUMENT; |
| } |
| if (size == 0) { |
| *mem_ptr = NULL; |
| } else { |
| *mem_ptr = (unsigned char *)os::malloc((size_t)size, mtInternal); |
| if (*mem_ptr == NULL) { |
| return JVMTI_ERROR_OUT_OF_MEMORY; |
| } |
| } |
| return JVMTI_ERROR_NONE; |
| } |
| |
| jvmtiError deallocate(unsigned char* mem) { |
| if (mem != NULL) { |
| os::free(mem); |
| } |
| return JVMTI_ERROR_NONE; |
| } |
| |
| |
| // Memory functions |
| unsigned char* jvmtiMalloc(jlong size); // don't use this - call allocate |
| |
| // method to create a local handle |
| jobject jni_reference(Handle hndl) { |
| return JNIHandles::make_local(hndl()); |
| } |
| |
| // method to create a local handle. |
| // This function allows caller to specify which |
| // threads local handle table to use. |
| jobject jni_reference(JavaThread *thread, Handle hndl) { |
| return JNIHandles::make_local(thread, hndl()); |
| } |
| |
| // method to destroy a local handle |
| void destroy_jni_reference(jobject jobj) { |
| JNIHandles::destroy_local(jobj); |
| } |
| |
| // method to destroy a local handle. |
| // This function allows caller to specify which |
| // threads local handle table to use although currently it is |
| // not used. |
| void destroy_jni_reference(JavaThread *thread, jobject jobj) { |
| destroy_jni_reference(jobj); |
| } |
| |
| jvmtiEnv* jvmti_external() { return &_jvmti_external; }; |
| |
| // Event Dispatch |
| |
| bool has_callback(jvmtiEvent event_type) { |
| assert(event_type >= JVMTI_MIN_EVENT_TYPE_VAL && |
| event_type <= JVMTI_MAX_EVENT_TYPE_VAL, "checking"); |
| return ((void**)&_event_callbacks)[event_type-JVMTI_MIN_EVENT_TYPE_VAL] != NULL; |
| } |
| |
| jvmtiEventCallbacks* callbacks() { |
| return &_event_callbacks; |
| } |
| |
| jvmtiExtEventCallbacks* ext_callbacks() { |
| return &_ext_event_callbacks; |
| } |
| |
| void set_tag_map(JvmtiTagMap* tag_map) { |
| _tag_map = tag_map; |
| } |
| |
| JvmtiTagMap* tag_map() { |
| return _tag_map; |
| } |
| |
| |
| // return true if event is enabled globally or for any thread |
| // True only if there is a callback for it. |
| bool is_enabled(jvmtiEvent event_type) { |
| return _env_event_enable.is_enabled(event_type); |
| } |
| |
| // Random Utilities |
| |
| protected: |
| // helper methods for creating arrays of global JNI Handles from local Handles |
| // allocated into environment specific storage |
| jobject * new_jobjectArray(int length, Handle *handles); |
| jthread * new_jthreadArray(int length, Handle *handles); |
| jthreadGroup * new_jthreadGroupArray(int length, Handle *handles); |
| |
| // convert from JNIHandle to JavaThread * |
| JavaThread * get_JavaThread(jthread jni_thread); |
| |
| // convert to a jni jclass from a non-null Klass* |
| jclass get_jni_class_non_null(Klass* k); |
| |
| jint count_locked_objects(JavaThread *java_thread, Handle hobj); |
| jvmtiError get_locked_objects_in_frame(JavaThread *calling_thread, |
| JavaThread* java_thread, |
| javaVFrame *jvf, |
| GrowableArray<jvmtiMonitorStackDepthInfo*>* owned_monitors_list, |
| jint depth); |
| vframe* vframeFor(JavaThread* java_thread, jint depth); |
| |
| public: |
| // get a field descriptor for the specified class and field |
| static bool get_field_descriptor(Klass* k, jfieldID field, fieldDescriptor* fd); |
| // test for suspend - most (all?) of these should go away |
| static bool is_thread_fully_suspended(JavaThread *thread, |
| bool wait_for_suspend, |
| uint32_t *bits); |
| |
| |
| // JVMTI API helper functions which are called at safepoint or thread is suspended. |
| jvmtiError get_frame_count(JvmtiThreadState *state, jint *count_ptr); |
| jvmtiError get_frame_location(JavaThread* java_thread, jint depth, |
| jmethodID* method_ptr, jlocation* location_ptr); |
| jvmtiError get_object_monitor_usage(JavaThread *calling_thread, |
| jobject object, jvmtiMonitorUsage* info_ptr); |
| jvmtiError get_stack_trace(JavaThread *java_thread, |
| jint stack_depth, jint max_count, |
| jvmtiFrameInfo* frame_buffer, jint* count_ptr); |
| jvmtiError get_current_contended_monitor(JavaThread *calling_thread, |
| JavaThread *java_thread, |
| jobject *monitor_ptr); |
| jvmtiError get_owned_monitors(JavaThread *calling_thread, JavaThread* java_thread, |
| GrowableArray<jvmtiMonitorStackDepthInfo*> *owned_monitors_list); |
| jvmtiError check_top_frame(JavaThread* current_thread, JavaThread* java_thread, |
| jvalue value, TosState tos, Handle* ret_ob_h); |
| jvmtiError force_early_return(JavaThread* java_thread, jvalue value, TosState tos); |
| }; |
| |
| // This class is the only safe means of iterating through environments. |
| // Note that this iteratation includes invalid environments pending |
| // deallocation -- in fact, some uses depend on this behavior. |
| |
| class JvmtiEnvIterator : public StackObj { |
| private: |
| bool _entry_was_marked; |
| public: |
| JvmtiEnvIterator() { |
| if (Threads::number_of_threads() == 0) { |
| _entry_was_marked = false; // we are single-threaded, no need |
| } else { |
| Thread::current()->entering_jvmti_env_iteration(); |
| _entry_was_marked = true; |
| } |
| } |
| ~JvmtiEnvIterator() { |
| if (_entry_was_marked) { |
| Thread::current()->leaving_jvmti_env_iteration(); |
| } |
| } |
| JvmtiEnv* first() { return JvmtiEnvBase::head_environment(); } |
| JvmtiEnv* next(JvmtiEnvBase* env) { return env->next_environment(); } |
| }; |
| |
| // VM operation to update for pop top frame. |
| class VM_UpdateForPopTopFrame : public VM_Operation { |
| private: |
| JvmtiThreadState* _state; |
| jvmtiError _result; |
| |
| public: |
| VM_UpdateForPopTopFrame(JvmtiThreadState* state) { |
| _state = state; |
| _result = JVMTI_ERROR_NONE; |
| } |
| VMOp_Type type() const { return VMOp_UpdateForPopTopFrame; } |
| jvmtiError result() { return _result; } |
| void doit() { |
| JavaThread* jt = _state->get_thread(); |
| if (Threads::includes(jt) && !jt->is_exiting() && jt->threadObj() != NULL) { |
| _state->update_for_pop_top_frame(); |
| } else { |
| _result = JVMTI_ERROR_THREAD_NOT_ALIVE; |
| } |
| } |
| }; |
| |
| // VM operation to set frame pop. |
| class VM_SetFramePop : public VM_Operation { |
| private: |
| JvmtiEnv *_env; |
| JvmtiThreadState* _state; |
| jint _depth; |
| jvmtiError _result; |
| |
| public: |
| VM_SetFramePop(JvmtiEnv *env, JvmtiThreadState* state, jint depth) { |
| _env = env; |
| _state = state; |
| _depth = depth; |
| _result = JVMTI_ERROR_NONE; |
| } |
| // Nested operation must be allowed for the VM_EnterInterpOnlyMode that is |
| // called from the JvmtiEventControllerPrivate::recompute_thread_enabled. |
| bool allow_nested_vm_operations() const { return true; } |
| VMOp_Type type() const { return VMOp_SetFramePop; } |
| jvmtiError result() { return _result; } |
| void doit() { |
| JavaThread* jt = _state->get_thread(); |
| if (Threads::includes(jt) && !jt->is_exiting() && jt->threadObj() != NULL) { |
| int frame_number = _state->count_frames() - _depth; |
| _state->env_thread_state((JvmtiEnvBase*)_env)->set_frame_pop(frame_number); |
| } else { |
| _result = JVMTI_ERROR_THREAD_NOT_ALIVE; |
| } |
| } |
| }; |
| |
| |
| // VM operation to get monitor information with stack depth. |
| class VM_GetOwnedMonitorInfo : public VM_Operation { |
| private: |
| JvmtiEnv *_env; |
| JavaThread* _calling_thread; |
| JavaThread *_java_thread; |
| jvmtiError _result; |
| GrowableArray<jvmtiMonitorStackDepthInfo*> *_owned_monitors_list; |
| |
| public: |
| VM_GetOwnedMonitorInfo(JvmtiEnv* env, JavaThread* calling_thread, |
| JavaThread* java_thread, |
| GrowableArray<jvmtiMonitorStackDepthInfo*>* owned_monitor_list) { |
| _env = env; |
| _calling_thread = calling_thread; |
| _java_thread = java_thread; |
| _owned_monitors_list = owned_monitor_list; |
| _result = JVMTI_ERROR_NONE; |
| } |
| VMOp_Type type() const { return VMOp_GetOwnedMonitorInfo; } |
| void doit() { |
| _result = JVMTI_ERROR_THREAD_NOT_ALIVE; |
| if (Threads::includes(_java_thread) && !_java_thread->is_exiting() |
| && _java_thread->threadObj() != NULL) { |
| _result = ((JvmtiEnvBase *)_env)->get_owned_monitors(_calling_thread, _java_thread, |
| _owned_monitors_list); |
| } |
| } |
| jvmtiError result() { return _result; } |
| }; |
| |
| |
| // VM operation to get object monitor usage. |
| class VM_GetObjectMonitorUsage : public VM_Operation { |
| private: |
| JvmtiEnv *_env; |
| jobject _object; |
| JavaThread* _calling_thread; |
| jvmtiMonitorUsage* _info_ptr; |
| jvmtiError _result; |
| |
| public: |
| VM_GetObjectMonitorUsage(JvmtiEnv *env, JavaThread* calling_thread, jobject object, jvmtiMonitorUsage* info_ptr) { |
| _env = env; |
| _object = object; |
| _calling_thread = calling_thread; |
| _info_ptr = info_ptr; |
| } |
| VMOp_Type type() const { return VMOp_GetObjectMonitorUsage; } |
| jvmtiError result() { return _result; } |
| void doit() { |
| _result = ((JvmtiEnvBase*) _env)->get_object_monitor_usage(_calling_thread, _object, _info_ptr); |
| } |
| |
| }; |
| |
| // VM operation to get current contended monitor. |
| class VM_GetCurrentContendedMonitor : public VM_Operation { |
| private: |
| JvmtiEnv *_env; |
| JavaThread *_calling_thread; |
| JavaThread *_java_thread; |
| jobject *_owned_monitor_ptr; |
| jvmtiError _result; |
| |
| public: |
| VM_GetCurrentContendedMonitor(JvmtiEnv *env, JavaThread *calling_thread, JavaThread *java_thread, jobject *mon_ptr) { |
| _env = env; |
| _calling_thread = calling_thread; |
| _java_thread = java_thread; |
| _owned_monitor_ptr = mon_ptr; |
| } |
| VMOp_Type type() const { return VMOp_GetCurrentContendedMonitor; } |
| jvmtiError result() { return _result; } |
| void doit() { |
| _result = JVMTI_ERROR_THREAD_NOT_ALIVE; |
| if (Threads::includes(_java_thread) && !_java_thread->is_exiting() && |
| _java_thread->threadObj() != NULL) { |
| _result = ((JvmtiEnvBase *)_env)->get_current_contended_monitor(_calling_thread,_java_thread,_owned_monitor_ptr); |
| } |
| } |
| }; |
| |
| // VM operation to get stack trace at safepoint. |
| class VM_GetStackTrace : public VM_Operation { |
| private: |
| JvmtiEnv *_env; |
| JavaThread *_java_thread; |
| jint _start_depth; |
| jint _max_count; |
| jvmtiFrameInfo *_frame_buffer; |
| jint *_count_ptr; |
| jvmtiError _result; |
| |
| public: |
| VM_GetStackTrace(JvmtiEnv *env, JavaThread *java_thread, |
| jint start_depth, jint max_count, |
| jvmtiFrameInfo* frame_buffer, jint* count_ptr) { |
| _env = env; |
| _java_thread = java_thread; |
| _start_depth = start_depth; |
| _max_count = max_count; |
| _frame_buffer = frame_buffer; |
| _count_ptr = count_ptr; |
| } |
| jvmtiError result() { return _result; } |
| VMOp_Type type() const { return VMOp_GetStackTrace; } |
| void doit() { |
| _result = JVMTI_ERROR_THREAD_NOT_ALIVE; |
| if (Threads::includes(_java_thread) && !_java_thread->is_exiting() |
| && _java_thread->threadObj() != NULL) { |
| _result = ((JvmtiEnvBase *)_env)->get_stack_trace(_java_thread, |
| _start_depth, _max_count, |
| _frame_buffer, _count_ptr); |
| } |
| } |
| }; |
| |
| // forward declaration |
| struct StackInfoNode; |
| |
| // VM operation to get stack trace at safepoint. |
| class VM_GetMultipleStackTraces : public VM_Operation { |
| private: |
| JvmtiEnv *_env; |
| jint _max_frame_count; |
| jvmtiStackInfo *_stack_info; |
| jvmtiError _result; |
| int _frame_count_total; |
| struct StackInfoNode *_head; |
| |
| JvmtiEnvBase *env() { return (JvmtiEnvBase *)_env; } |
| jint max_frame_count() { return _max_frame_count; } |
| struct StackInfoNode *head() { return _head; } |
| void set_head(StackInfoNode *head) { _head = head; } |
| |
| protected: |
| void set_result(jvmtiError result) { _result = result; } |
| void fill_frames(jthread jt, JavaThread *thr, oop thread_oop); |
| void allocate_and_fill_stacks(jint thread_count); |
| |
| public: |
| VM_GetMultipleStackTraces(JvmtiEnv *env, jint max_frame_count) { |
| _env = env; |
| _max_frame_count = max_frame_count; |
| _frame_count_total = 0; |
| _head = NULL; |
| _result = JVMTI_ERROR_NONE; |
| } |
| VMOp_Type type() const { return VMOp_GetMultipleStackTraces; } |
| jvmtiStackInfo *stack_info() { return _stack_info; } |
| jvmtiError result() { return _result; } |
| }; |
| |
| |
| // VM operation to get stack trace at safepoint. |
| class VM_GetAllStackTraces : public VM_GetMultipleStackTraces { |
| private: |
| JavaThread *_calling_thread; |
| jint _final_thread_count; |
| |
| public: |
| VM_GetAllStackTraces(JvmtiEnv *env, JavaThread *calling_thread, |
| jint max_frame_count) |
| : VM_GetMultipleStackTraces(env, max_frame_count) { |
| _calling_thread = calling_thread; |
| } |
| VMOp_Type type() const { return VMOp_GetAllStackTraces; } |
| void doit(); |
| jint final_thread_count() { return _final_thread_count; } |
| }; |
| |
| // VM operation to get stack trace at safepoint. |
| class VM_GetThreadListStackTraces : public VM_GetMultipleStackTraces { |
| private: |
| jint _thread_count; |
| const jthread* _thread_list; |
| |
| public: |
| VM_GetThreadListStackTraces(JvmtiEnv *env, jint thread_count, const jthread* thread_list, jint max_frame_count) |
| : VM_GetMultipleStackTraces(env, max_frame_count) { |
| _thread_count = thread_count; |
| _thread_list = thread_list; |
| } |
| VMOp_Type type() const { return VMOp_GetThreadListStackTraces; } |
| void doit(); |
| }; |
| |
| |
| // VM operation to count stack frames at safepoint. |
| class VM_GetFrameCount : public VM_Operation { |
| private: |
| JvmtiEnv *_env; |
| JvmtiThreadState *_state; |
| jint *_count_ptr; |
| jvmtiError _result; |
| |
| public: |
| VM_GetFrameCount(JvmtiEnv *env, JvmtiThreadState *state, jint *count_ptr) { |
| _env = env; |
| _state = state; |
| _count_ptr = count_ptr; |
| } |
| VMOp_Type type() const { return VMOp_GetFrameCount; } |
| jvmtiError result() { return _result; } |
| void doit() { |
| _result = JVMTI_ERROR_THREAD_NOT_ALIVE; |
| JavaThread* jt = _state->get_thread(); |
| if (Threads::includes(jt) && !jt->is_exiting() && jt->threadObj() != NULL) { |
| _result = ((JvmtiEnvBase*)_env)->get_frame_count(_state, _count_ptr); |
| } |
| } |
| }; |
| |
| // VM operation to frame location at safepoint. |
| class VM_GetFrameLocation : public VM_Operation { |
| private: |
| JvmtiEnv *_env; |
| JavaThread* _java_thread; |
| jint _depth; |
| jmethodID* _method_ptr; |
| jlocation* _location_ptr; |
| jvmtiError _result; |
| |
| public: |
| VM_GetFrameLocation(JvmtiEnv *env, JavaThread* java_thread, jint depth, |
| jmethodID* method_ptr, jlocation* location_ptr) { |
| _env = env; |
| _java_thread = java_thread; |
| _depth = depth; |
| _method_ptr = method_ptr; |
| _location_ptr = location_ptr; |
| } |
| VMOp_Type type() const { return VMOp_GetFrameLocation; } |
| jvmtiError result() { return _result; } |
| void doit() { |
| _result = JVMTI_ERROR_THREAD_NOT_ALIVE; |
| if (Threads::includes(_java_thread) && !_java_thread->is_exiting() && |
| _java_thread->threadObj() != NULL) { |
| _result = ((JvmtiEnvBase*)_env)->get_frame_location(_java_thread, _depth, |
| _method_ptr, _location_ptr); |
| } |
| } |
| }; |
| |
| |
| // ResourceTracker |
| // |
| // ResourceTracker works a little like a ResourceMark. All allocates |
| // using the resource tracker are recorded. If an allocate using the |
| // resource tracker fails the destructor will free any resources |
| // that were allocated using the tracker. |
| // The motive for this class is to avoid messy error recovery code |
| // in situations where multiple allocations are done in sequence. If |
| // the second or subsequent allocation fails it avoids any code to |
| // release memory allocated in the previous calls. |
| // |
| // Usage :- |
| // ResourceTracker rt(env); |
| // : |
| // err = rt.allocate(1024, &ptr); |
| |
| class ResourceTracker : public StackObj { |
| private: |
| JvmtiEnv* _env; |
| GrowableArray<unsigned char*> *_allocations; |
| bool _failed; |
| public: |
| ResourceTracker(JvmtiEnv* env); |
| ~ResourceTracker(); |
| jvmtiError allocate(jlong size, unsigned char** mem_ptr); |
| unsigned char* allocate(jlong size); |
| char* strdup(const char* str); |
| }; |
| |
| |
| // Jvmti monitor closure to collect off stack monitors. |
| class JvmtiMonitorClosure: public MonitorClosure { |
| private: |
| JavaThread *_java_thread; |
| JavaThread *_calling_thread; |
| GrowableArray<jvmtiMonitorStackDepthInfo*> *_owned_monitors_list; |
| jvmtiError _error; |
| JvmtiEnvBase *_env; |
| |
| public: |
| JvmtiMonitorClosure(JavaThread* thread, JavaThread *calling_thread, |
| GrowableArray<jvmtiMonitorStackDepthInfo*> *owned_monitors, |
| JvmtiEnvBase *env) { |
| _java_thread = thread; |
| _calling_thread = calling_thread; |
| _owned_monitors_list = owned_monitors; |
| _error = JVMTI_ERROR_NONE; |
| _env = env; |
| } |
| void do_monitor(ObjectMonitor* mon); |
| jvmtiError error() { return _error;} |
| }; |
| |
| |
| // Jvmti module closure to collect all modules loaded to the system. |
| class JvmtiModuleClosure : public StackObj { |
| private: |
| static GrowableArray<OopHandle> *_tbl; // Protected with Module_lock |
| |
| static void do_module(ModuleEntry* entry) { |
| assert_locked_or_safepoint(Module_lock); |
| OopHandle module = entry->module_handle(); |
| guarantee(module.resolve() != NULL, "module object is NULL"); |
| _tbl->push(module); |
| } |
| |
| public: |
| jvmtiError get_all_modules(JvmtiEnv* env, jint* module_count_ptr, jobject** modules_ptr); |
| }; |
| |
| #endif // SHARE_VM_PRIMS_JVMTIENVBASE_HPP |