--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/hotspot/share/prims/jvmtiEnvBase.hpp Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,721 @@
+/*
+ * 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