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jdk-24/hotspot/src/share/vm/prims/jvmtiEnvBase.hpp
Max Ockner 91dbd4f088 8060074: os::free() takes MemoryTrackingLevel but doesn't need it 
Cleaned up unused arguments in os::free and it's callers.

Reviewed-by: lfoltan, coleenp, ctornqvi, dholmes
2014-12-01 12:16:15 -05:00

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/*
* Copyright (c) 2003, 2014, 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 "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 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:
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; }
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;}
};
#endif // SHARE_VM_PRIMS_JVMTIENVBASE_HPP
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