8199620: Support for JNI object pinning
Reviewed-by: pliden, tschatzl, eosterlund
/*
* Copyright (c) 1997, 2018, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2012 Red Hat, Inc.
* 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.
*
*/
#include "precompiled.hpp"
#include "jni.h"
#include "jvm.h"
#include "ci/ciReplay.hpp"
#include "classfile/altHashing.hpp"
#include "classfile/classFileStream.hpp"
#include "classfile/classLoader.hpp"
#include "classfile/javaClasses.hpp"
#include "classfile/javaClasses.inline.hpp"
#include "classfile/modules.hpp"
#include "classfile/symbolTable.hpp"
#include "classfile/systemDictionary.hpp"
#include "classfile/vmSymbols.hpp"
#include "interpreter/linkResolver.hpp"
#include "memory/allocation.hpp"
#include "memory/allocation.inline.hpp"
#include "memory/oopFactory.hpp"
#include "memory/resourceArea.hpp"
#include "memory/universe.hpp"
#include "oops/access.inline.hpp"
#include "oops/arrayOop.inline.hpp"
#include "oops/instanceKlass.hpp"
#include "oops/instanceOop.hpp"
#include "oops/markOop.hpp"
#include "oops/method.hpp"
#include "oops/objArrayKlass.hpp"
#include "oops/objArrayOop.inline.hpp"
#include "oops/oop.inline.hpp"
#include "oops/symbol.hpp"
#include "oops/typeArrayKlass.hpp"
#include "oops/typeArrayOop.inline.hpp"
#include "prims/jniCheck.hpp"
#include "prims/jniExport.hpp"
#include "prims/jniFastGetField.hpp"
#include "prims/jvm_misc.hpp"
#include "prims/jvmtiExport.hpp"
#include "prims/jvmtiThreadState.hpp"
#include "runtime/atomic.hpp"
#include "runtime/compilationPolicy.hpp"
#include "runtime/fieldDescriptor.hpp"
#include "runtime/handles.inline.hpp"
#include "runtime/interfaceSupport.inline.hpp"
#include "runtime/java.hpp"
#include "runtime/javaCalls.hpp"
#include "runtime/jfieldIDWorkaround.hpp"
#include "runtime/jniHandles.inline.hpp"
#include "runtime/orderAccess.inline.hpp"
#include "runtime/reflection.hpp"
#include "runtime/sharedRuntime.hpp"
#include "runtime/signature.hpp"
#include "runtime/thread.inline.hpp"
#include "runtime/vm_operations.hpp"
#include "services/memTracker.hpp"
#include "services/runtimeService.hpp"
#include "trace/traceMacros.hpp"
#include "trace/tracing.hpp"
#include "utilities/defaultStream.hpp"
#include "utilities/dtrace.hpp"
#include "utilities/events.hpp"
#include "utilities/histogram.hpp"
#include "utilities/internalVMTests.hpp"
#include "utilities/macros.hpp"
#include "utilities/vmError.hpp"
#if INCLUDE_JVMCI
#include "jvmci/jvmciCompiler.hpp"
#include "jvmci/jvmciRuntime.hpp"
#endif
static jint CurrentVersion = JNI_VERSION_10;
#ifdef _WIN32
extern LONG WINAPI topLevelExceptionFilter(_EXCEPTION_POINTERS* );
#endif
// The DT_RETURN_MARK macros create a scoped object to fire the dtrace
// '-return' probe regardless of the return path is taken out of the function.
// Methods that have multiple return paths use this to avoid having to
// instrument each return path. Methods that use CHECK or THROW must use this
// since those macros can cause an immedate uninstrumented return.
//
// In order to get the return value, a reference to the variable containing
// the return value must be passed to the contructor of the object, and
// the return value must be set before return (since the mark object has
// a reference to it).
//
// Example:
// DT_RETURN_MARK_DECL(SomeFunc, int);
// JNI_ENTRY(int, SomeFunc, ...)
// int return_value = 0;
// DT_RETURN_MARK(SomeFunc, int, (const int&)return_value);
// foo(CHECK_0)
// return_value = 5;
// return return_value;
// JNI_END
#define DT_RETURN_MARK_DECL(name, type, probe) \
DTRACE_ONLY( \
class DTraceReturnProbeMark_##name { \
public: \
const type& _ret_ref; \
DTraceReturnProbeMark_##name(const type& v) : _ret_ref(v) {} \
~DTraceReturnProbeMark_##name() { \
probe; \
} \
} \
)
// Void functions are simpler since there's no return value
#define DT_VOID_RETURN_MARK_DECL(name, probe) \
DTRACE_ONLY( \
class DTraceReturnProbeMark_##name { \
public: \
~DTraceReturnProbeMark_##name() { \
probe; \
} \
} \
)
// Place these macros in the function to mark the return. Non-void
// functions need the type and address of the return value.
#define DT_RETURN_MARK(name, type, ref) \
DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark(ref) )
#define DT_VOID_RETURN_MARK(name) \
DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark )
// Use these to select distinct code for floating-point vs. non-floating point
// situations. Used from within common macros where we need slightly
// different behavior for Float/Double
#define FP_SELECT_Boolean(intcode, fpcode) intcode
#define FP_SELECT_Byte(intcode, fpcode) intcode
#define FP_SELECT_Char(intcode, fpcode) intcode
#define FP_SELECT_Short(intcode, fpcode) intcode
#define FP_SELECT_Object(intcode, fpcode) intcode
#define FP_SELECT_Int(intcode, fpcode) intcode
#define FP_SELECT_Long(intcode, fpcode) intcode
#define FP_SELECT_Float(intcode, fpcode) fpcode
#define FP_SELECT_Double(intcode, fpcode) fpcode
#define FP_SELECT(TypeName, intcode, fpcode) \
FP_SELECT_##TypeName(intcode, fpcode)
// Choose DT_RETURN_MARK macros based on the type: float/double -> void
// (dtrace doesn't do FP yet)
#define DT_RETURN_MARK_DECL_FOR(TypeName, name, type, probe) \
FP_SELECT(TypeName, \
DT_RETURN_MARK_DECL(name, type, probe), DT_VOID_RETURN_MARK_DECL(name, probe) )
#define DT_RETURN_MARK_FOR(TypeName, name, type, ref) \
FP_SELECT(TypeName, \
DT_RETURN_MARK(name, type, ref), DT_VOID_RETURN_MARK(name) )
// out-of-line helpers for class jfieldIDWorkaround:
bool jfieldIDWorkaround::is_valid_jfieldID(Klass* k, jfieldID id) {
if (jfieldIDWorkaround::is_instance_jfieldID(k, id)) {
uintptr_t as_uint = (uintptr_t) id;
intptr_t offset = raw_instance_offset(id);
if (is_checked_jfieldID(id)) {
if (!klass_hash_ok(k, id)) {
return false;
}
}
return InstanceKlass::cast(k)->contains_field_offset(offset);
} else {
JNIid* result = (JNIid*) id;
#ifdef ASSERT
return result != NULL && result->is_static_field_id();
#else
return result != NULL;
#endif
}
}
intptr_t jfieldIDWorkaround::encode_klass_hash(Klass* k, intptr_t offset) {
if (offset <= small_offset_mask) {
Klass* field_klass = k;
Klass* super_klass = field_klass->super();
// With compressed oops the most super class with nonstatic fields would
// be the owner of fields embedded in the header.
while (InstanceKlass::cast(super_klass)->has_nonstatic_fields() &&
InstanceKlass::cast(super_klass)->contains_field_offset(offset)) {
field_klass = super_klass; // super contains the field also
super_klass = field_klass->super();
}
debug_only(NoSafepointVerifier nosafepoint;)
uintptr_t klass_hash = field_klass->identity_hash();
return ((klass_hash & klass_mask) << klass_shift) | checked_mask_in_place;
} else {
#if 0
#ifndef PRODUCT
{
ResourceMark rm;
warning("VerifyJNIFields: long offset %d in %s", offset, k->external_name());
}
#endif
#endif
return 0;
}
}
bool jfieldIDWorkaround::klass_hash_ok(Klass* k, jfieldID id) {
uintptr_t as_uint = (uintptr_t) id;
intptr_t klass_hash = (as_uint >> klass_shift) & klass_mask;
do {
debug_only(NoSafepointVerifier nosafepoint;)
// Could use a non-blocking query for identity_hash here...
if ((k->identity_hash() & klass_mask) == klass_hash)
return true;
k = k->super();
} while (k != NULL);
return false;
}
void jfieldIDWorkaround::verify_instance_jfieldID(Klass* k, jfieldID id) {
guarantee(jfieldIDWorkaround::is_instance_jfieldID(k, id), "must be an instance field" );
uintptr_t as_uint = (uintptr_t) id;
intptr_t offset = raw_instance_offset(id);
if (VerifyJNIFields) {
if (is_checked_jfieldID(id)) {
guarantee(klass_hash_ok(k, id),
"Bug in native code: jfieldID class must match object");
} else {
#if 0
#ifndef PRODUCT
if (Verbose) {
ResourceMark rm;
warning("VerifyJNIFields: unverified offset %d for %s", offset, k->external_name());
}
#endif
#endif
}
}
guarantee(InstanceKlass::cast(k)->contains_field_offset(offset),
"Bug in native code: jfieldID offset must address interior of object");
}
// Wrapper to trace JNI functions
#ifdef ASSERT
Histogram* JNIHistogram;
static volatile int JNIHistogram_lock = 0;
class JNIHistogramElement : public HistogramElement {
public:
JNIHistogramElement(const char* name);
};
JNIHistogramElement::JNIHistogramElement(const char* elementName) {
_name = elementName;
uintx count = 0;
while (Atomic::cmpxchg(1, &JNIHistogram_lock, 0) != 0) {
while (OrderAccess::load_acquire(&JNIHistogram_lock) != 0) {
count +=1;
if ( (WarnOnStalledSpinLock > 0)
&& (count % WarnOnStalledSpinLock == 0)) {
warning("JNIHistogram_lock seems to be stalled");
}
}
}
if(JNIHistogram == NULL)
JNIHistogram = new Histogram("JNI Call Counts",100);
JNIHistogram->add_element(this);
Atomic::dec(&JNIHistogram_lock);
}
#define JNICountWrapper(arg) \
static JNIHistogramElement* e = new JNIHistogramElement(arg); \
/* There is a MT-race condition in VC++. So we need to make sure that that e has been initialized */ \
if (e != NULL) e->increment_count()
#define JNIWrapper(arg) JNICountWrapper(arg);
#else
#define JNIWrapper(arg)
#endif
// Implementation of JNI entries
DT_RETURN_MARK_DECL(DefineClass, jclass
, HOTSPOT_JNI_DEFINECLASS_RETURN(_ret_ref));
JNI_ENTRY(jclass, jni_DefineClass(JNIEnv *env, const char *name, jobject loaderRef,
const jbyte *buf, jsize bufLen))
JNIWrapper("DefineClass");
HOTSPOT_JNI_DEFINECLASS_ENTRY(
env, (char*) name, loaderRef, (char*) buf, bufLen);
jclass cls = NULL;
DT_RETURN_MARK(DefineClass, jclass, (const jclass&)cls);
TempNewSymbol class_name = NULL;
// Since exceptions can be thrown, class initialization can take place
// if name is NULL no check for class name in .class stream has to be made.
if (name != NULL) {
const int str_len = (int)strlen(name);
if (str_len > Symbol::max_length()) {
// It's impossible to create this class; the name cannot fit
// into the constant pool.
Exceptions::fthrow(THREAD_AND_LOCATION,
vmSymbols::java_lang_NoClassDefFoundError(),
"Class name exceeds maximum length of %d: %s",
Symbol::max_length(),
name);
return 0;
}
class_name = SymbolTable::new_symbol(name, CHECK_NULL);
}
ResourceMark rm(THREAD);
ClassFileStream st((u1*)buf, bufLen, NULL, ClassFileStream::verify);
Handle class_loader (THREAD, JNIHandles::resolve(loaderRef));
if (UsePerfData && !class_loader.is_null()) {
// check whether the current caller thread holds the lock or not.
// If not, increment the corresponding counter
if (ObjectSynchronizer::
query_lock_ownership((JavaThread*)THREAD, class_loader) !=
ObjectSynchronizer::owner_self) {
ClassLoader::sync_JNIDefineClassLockFreeCounter()->inc();
}
}
Klass* k = SystemDictionary::resolve_from_stream(class_name,
class_loader,
Handle(),
&st,
CHECK_NULL);
if (log_is_enabled(Debug, class, resolve) && k != NULL) {
trace_class_resolution(k);
}
cls = (jclass)JNIHandles::make_local(
env, k->java_mirror());
return cls;
JNI_END
static bool first_time_FindClass = true;
DT_RETURN_MARK_DECL(FindClass, jclass
, HOTSPOT_JNI_FINDCLASS_RETURN(_ret_ref));
JNI_ENTRY(jclass, jni_FindClass(JNIEnv *env, const char *name))
JNIWrapper("FindClass");
HOTSPOT_JNI_FINDCLASS_ENTRY(env, (char *)name);
jclass result = NULL;
DT_RETURN_MARK(FindClass, jclass, (const jclass&)result);
// Remember if we are the first invocation of jni_FindClass
bool first_time = first_time_FindClass;
first_time_FindClass = false;
// Sanity check the name: it cannot be null or larger than the maximum size
// name we can fit in the constant pool.
if (name == NULL) {
THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), "No class name given");
}
if ((int)strlen(name) > Symbol::max_length()) {
Exceptions::fthrow(THREAD_AND_LOCATION,
vmSymbols::java_lang_NoClassDefFoundError(),
"Class name exceeds maximum length of %d: %s",
Symbol::max_length(),
name);
return 0;
}
//%note jni_3
Handle protection_domain;
// Find calling class
Klass* k = thread->security_get_caller_class(0);
// default to the system loader when no context
Handle loader(THREAD, SystemDictionary::java_system_loader());
if (k != NULL) {
// Special handling to make sure JNI_OnLoad and JNI_OnUnload are executed
// in the correct class context.
if (k->class_loader() == NULL &&
k->name() == vmSymbols::java_lang_ClassLoader_NativeLibrary()) {
JavaValue result(T_OBJECT);
JavaCalls::call_static(&result, k,
vmSymbols::getFromClass_name(),
vmSymbols::void_class_signature(),
CHECK_NULL);
// When invoked from JNI_OnLoad, NativeLibrary::getFromClass returns
// a non-NULL Class object. When invoked from JNI_OnUnload,
// it will return NULL to indicate no context.
oop mirror = (oop) result.get_jobject();
if (mirror != NULL) {
Klass* fromClass = java_lang_Class::as_Klass(mirror);
loader = Handle(THREAD, fromClass->class_loader());
protection_domain = Handle(THREAD, fromClass->protection_domain());
}
} else {
loader = Handle(THREAD, k->class_loader());
}
}
TempNewSymbol sym = SymbolTable::new_symbol(name, CHECK_NULL);
result = find_class_from_class_loader(env, sym, true, loader,
protection_domain, true, thread);
if (log_is_enabled(Debug, class, resolve) && result != NULL) {
trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
}
// If we were the first invocation of jni_FindClass, we enable compilation again
// rather than just allowing invocation counter to overflow and decay.
// Controlled by flag DelayCompilationDuringStartup.
if (first_time && !CompileTheWorld)
CompilationPolicy::completed_vm_startup();
return result;
JNI_END
DT_RETURN_MARK_DECL(FromReflectedMethod, jmethodID
, HOTSPOT_JNI_FROMREFLECTEDMETHOD_RETURN((uintptr_t)_ret_ref));
JNI_ENTRY(jmethodID, jni_FromReflectedMethod(JNIEnv *env, jobject method))
JNIWrapper("FromReflectedMethod");
HOTSPOT_JNI_FROMREFLECTEDMETHOD_ENTRY(env, method);
jmethodID ret = NULL;
DT_RETURN_MARK(FromReflectedMethod, jmethodID, (const jmethodID&)ret);
// method is a handle to a java.lang.reflect.Method object
oop reflected = JNIHandles::resolve_non_null(method);
oop mirror = NULL;
int slot = 0;
if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) {
mirror = java_lang_reflect_Constructor::clazz(reflected);
slot = java_lang_reflect_Constructor::slot(reflected);
} else {
assert(reflected->klass() == SystemDictionary::reflect_Method_klass(), "wrong type");
mirror = java_lang_reflect_Method::clazz(reflected);
slot = java_lang_reflect_Method::slot(reflected);
}
Klass* k1 = java_lang_Class::as_Klass(mirror);
// Make sure class is initialized before handing id's out to methods
k1->initialize(CHECK_NULL);
Method* m = InstanceKlass::cast(k1)->method_with_idnum(slot);
ret = m==NULL? NULL : m->jmethod_id(); // return NULL if reflected method deleted
return ret;
JNI_END
DT_RETURN_MARK_DECL(FromReflectedField, jfieldID
, HOTSPOT_JNI_FROMREFLECTEDFIELD_RETURN((uintptr_t)_ret_ref));
JNI_ENTRY(jfieldID, jni_FromReflectedField(JNIEnv *env, jobject field))
JNIWrapper("FromReflectedField");
HOTSPOT_JNI_FROMREFLECTEDFIELD_ENTRY(env, field);
jfieldID ret = NULL;
DT_RETURN_MARK(FromReflectedField, jfieldID, (const jfieldID&)ret);
// field is a handle to a java.lang.reflect.Field object
oop reflected = JNIHandles::resolve_non_null(field);
oop mirror = java_lang_reflect_Field::clazz(reflected);
Klass* k1 = java_lang_Class::as_Klass(mirror);
int slot = java_lang_reflect_Field::slot(reflected);
int modifiers = java_lang_reflect_Field::modifiers(reflected);
// Make sure class is initialized before handing id's out to fields
k1->initialize(CHECK_NULL);
// First check if this is a static field
if (modifiers & JVM_ACC_STATIC) {
intptr_t offset = InstanceKlass::cast(k1)->field_offset( slot );
JNIid* id = InstanceKlass::cast(k1)->jni_id_for(offset);
assert(id != NULL, "corrupt Field object");
debug_only(id->set_is_static_field_id();)
// A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass*
ret = jfieldIDWorkaround::to_static_jfieldID(id);
return ret;
}
// The slot is the index of the field description in the field-array
// The jfieldID is the offset of the field within the object
// It may also have hash bits for k, if VerifyJNIFields is turned on.
intptr_t offset = InstanceKlass::cast(k1)->field_offset( slot );
assert(InstanceKlass::cast(k1)->contains_field_offset(offset), "stay within object");
ret = jfieldIDWorkaround::to_instance_jfieldID(k1, offset);
return ret;
JNI_END
DT_RETURN_MARK_DECL(ToReflectedMethod, jobject
, HOTSPOT_JNI_TOREFLECTEDMETHOD_RETURN(_ret_ref));
JNI_ENTRY(jobject, jni_ToReflectedMethod(JNIEnv *env, jclass cls, jmethodID method_id, jboolean isStatic))
JNIWrapper("ToReflectedMethod");
HOTSPOT_JNI_TOREFLECTEDMETHOD_ENTRY(env, cls, (uintptr_t) method_id, isStatic);
jobject ret = NULL;
DT_RETURN_MARK(ToReflectedMethod, jobject, (const jobject&)ret);
methodHandle m (THREAD, Method::resolve_jmethod_id(method_id));
assert(m->is_static() == (isStatic != 0), "jni_ToReflectedMethod access flags doesn't match");
oop reflection_method;
if (m->is_initializer()) {
reflection_method = Reflection::new_constructor(m, CHECK_NULL);
} else {
reflection_method = Reflection::new_method(m, false, CHECK_NULL);
}
ret = JNIHandles::make_local(env, reflection_method);
return ret;
JNI_END
DT_RETURN_MARK_DECL(GetSuperclass, jclass
, HOTSPOT_JNI_GETSUPERCLASS_RETURN(_ret_ref));
JNI_ENTRY(jclass, jni_GetSuperclass(JNIEnv *env, jclass sub))
JNIWrapper("GetSuperclass");
HOTSPOT_JNI_GETSUPERCLASS_ENTRY(env, sub);
jclass obj = NULL;
DT_RETURN_MARK(GetSuperclass, jclass, (const jclass&)obj);
oop mirror = JNIHandles::resolve_non_null(sub);
// primitive classes return NULL
if (java_lang_Class::is_primitive(mirror)) return NULL;
// Rules of Class.getSuperClass as implemented by KLass::java_super:
// arrays return Object
// interfaces return NULL
// proper classes return Klass::super()
Klass* k = java_lang_Class::as_Klass(mirror);
if (k->is_interface()) return NULL;
// return mirror for superclass
Klass* super = k->java_super();
// super2 is the value computed by the compiler's getSuperClass intrinsic:
debug_only(Klass* super2 = ( k->is_array_klass()
? SystemDictionary::Object_klass()
: k->super() ) );
assert(super == super2,
"java_super computation depends on interface, array, other super");
obj = (super == NULL) ? NULL : (jclass) JNIHandles::make_local(super->java_mirror());
return obj;
JNI_END
JNI_QUICK_ENTRY(jboolean, jni_IsAssignableFrom(JNIEnv *env, jclass sub, jclass super))
JNIWrapper("IsSubclassOf");
HOTSPOT_JNI_ISASSIGNABLEFROM_ENTRY(env, sub, super);
oop sub_mirror = JNIHandles::resolve_non_null(sub);
oop super_mirror = JNIHandles::resolve_non_null(super);
if (java_lang_Class::is_primitive(sub_mirror) ||
java_lang_Class::is_primitive(super_mirror)) {
jboolean ret = (sub_mirror == super_mirror);
HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret);
return ret;
}
Klass* sub_klass = java_lang_Class::as_Klass(sub_mirror);
Klass* super_klass = java_lang_Class::as_Klass(super_mirror);
assert(sub_klass != NULL && super_klass != NULL, "invalid arguments to jni_IsAssignableFrom");
jboolean ret = sub_klass->is_subtype_of(super_klass) ?
JNI_TRUE : JNI_FALSE;
HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret);
return ret;
JNI_END
DT_RETURN_MARK_DECL(Throw, jint
, HOTSPOT_JNI_THROW_RETURN(_ret_ref));
JNI_ENTRY(jint, jni_Throw(JNIEnv *env, jthrowable obj))
JNIWrapper("Throw");
HOTSPOT_JNI_THROW_ENTRY(env, obj);
jint ret = JNI_OK;
DT_RETURN_MARK(Throw, jint, (const jint&)ret);
THROW_OOP_(JNIHandles::resolve(obj), JNI_OK);
ShouldNotReachHere();
return 0; // Mute compiler.
JNI_END
DT_RETURN_MARK_DECL(ThrowNew, jint
, HOTSPOT_JNI_THROWNEW_RETURN(_ret_ref));
JNI_ENTRY(jint, jni_ThrowNew(JNIEnv *env, jclass clazz, const char *message))
JNIWrapper("ThrowNew");
HOTSPOT_JNI_THROWNEW_ENTRY(env, clazz, (char *) message);
jint ret = JNI_OK;
DT_RETURN_MARK(ThrowNew, jint, (const jint&)ret);
InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
Symbol* name = k->name();
Handle class_loader (THREAD, k->class_loader());
Handle protection_domain (THREAD, k->protection_domain());
THROW_MSG_LOADER_(name, (char *)message, class_loader, protection_domain, JNI_OK);
ShouldNotReachHere();
return 0; // Mute compiler.
JNI_END
// JNI functions only transform a pending async exception to a synchronous
// exception in ExceptionOccurred and ExceptionCheck calls, since
// delivering an async exception in other places won't change the native
// code's control flow and would be harmful when native code further calls
// JNI functions with a pending exception. Async exception is also checked
// during the call, so ExceptionOccurred/ExceptionCheck won't return
// false but deliver the async exception at the very end during
// state transition.
static void jni_check_async_exceptions(JavaThread *thread) {
assert(thread == Thread::current(), "must be itself");
thread->check_and_handle_async_exceptions();
}
JNI_ENTRY_NO_PRESERVE(jthrowable, jni_ExceptionOccurred(JNIEnv *env))
JNIWrapper("ExceptionOccurred");
HOTSPOT_JNI_EXCEPTIONOCCURRED_ENTRY(env);
jni_check_async_exceptions(thread);
oop exception = thread->pending_exception();
jthrowable ret = (jthrowable) JNIHandles::make_local(env, exception);
HOTSPOT_JNI_EXCEPTIONOCCURRED_RETURN(ret);
return ret;
JNI_END
JNI_ENTRY_NO_PRESERVE(void, jni_ExceptionDescribe(JNIEnv *env))
JNIWrapper("ExceptionDescribe");
HOTSPOT_JNI_EXCEPTIONDESCRIBE_ENTRY(env);
if (thread->has_pending_exception()) {
Handle ex(thread, thread->pending_exception());
thread->clear_pending_exception();
if (ex->is_a(SystemDictionary::ThreadDeath_klass())) {
// Don't print anything if we are being killed.
} else {
jio_fprintf(defaultStream::error_stream(), "Exception ");
if (thread != NULL && thread->threadObj() != NULL) {
ResourceMark rm(THREAD);
jio_fprintf(defaultStream::error_stream(),
"in thread \"%s\" ", thread->get_thread_name());
}
if (ex->is_a(SystemDictionary::Throwable_klass())) {
JavaValue result(T_VOID);
JavaCalls::call_virtual(&result,
ex,
SystemDictionary::Throwable_klass(),
vmSymbols::printStackTrace_name(),
vmSymbols::void_method_signature(),
THREAD);
// If an exception is thrown in the call it gets thrown away. Not much
// we can do with it. The native code that calls this, does not check
// for the exception - hence, it might still be in the thread when DestroyVM gets
// called, potentially causing a few asserts to trigger - since no pending exception
// is expected.
CLEAR_PENDING_EXCEPTION;
} else {
ResourceMark rm(THREAD);
jio_fprintf(defaultStream::error_stream(),
". Uncaught exception of type %s.",
ex->klass()->external_name());
}
}
}
HOTSPOT_JNI_EXCEPTIONDESCRIBE_RETURN();
JNI_END
JNI_QUICK_ENTRY(void, jni_ExceptionClear(JNIEnv *env))
JNIWrapper("ExceptionClear");
HOTSPOT_JNI_EXCEPTIONCLEAR_ENTRY(env);
// The jni code might be using this API to clear java thrown exception.
// So just mark jvmti thread exception state as exception caught.
JvmtiThreadState *state = JavaThread::current()->jvmti_thread_state();
if (state != NULL && state->is_exception_detected()) {
state->set_exception_caught();
}
thread->clear_pending_exception();
HOTSPOT_JNI_EXCEPTIONCLEAR_RETURN();
JNI_END
JNI_ENTRY(void, jni_FatalError(JNIEnv *env, const char *msg))
JNIWrapper("FatalError");
HOTSPOT_JNI_FATALERROR_ENTRY(env, (char *) msg);
tty->print_cr("FATAL ERROR in native method: %s", msg);
thread->print_stack();
os::abort(); // Dump core and abort
JNI_END
JNI_ENTRY(jint, jni_PushLocalFrame(JNIEnv *env, jint capacity))
JNIWrapper("PushLocalFrame");
HOTSPOT_JNI_PUSHLOCALFRAME_ENTRY(env, capacity);
//%note jni_11
if (capacity < 0 ||
((MaxJNILocalCapacity > 0) && (capacity > MaxJNILocalCapacity))) {
HOTSPOT_JNI_PUSHLOCALFRAME_RETURN((uint32_t)JNI_ERR);
return JNI_ERR;
}
JNIHandleBlock* old_handles = thread->active_handles();
JNIHandleBlock* new_handles = JNIHandleBlock::allocate_block(thread);
assert(new_handles != NULL, "should not be NULL");
new_handles->set_pop_frame_link(old_handles);
thread->set_active_handles(new_handles);
jint ret = JNI_OK;
HOTSPOT_JNI_PUSHLOCALFRAME_RETURN(ret);
return ret;
JNI_END
JNI_ENTRY(jobject, jni_PopLocalFrame(JNIEnv *env, jobject result))
JNIWrapper("PopLocalFrame");
HOTSPOT_JNI_POPLOCALFRAME_ENTRY(env, result);
//%note jni_11
Handle result_handle(thread, JNIHandles::resolve(result));
JNIHandleBlock* old_handles = thread->active_handles();
JNIHandleBlock* new_handles = old_handles->pop_frame_link();
if (new_handles != NULL) {
// As a sanity check we only release the handle blocks if the pop_frame_link is not NULL.
// This way code will still work if PopLocalFrame is called without a corresponding
// PushLocalFrame call. Note that we set the pop_frame_link to NULL explicitly, otherwise
// the release_block call will release the blocks.
thread->set_active_handles(new_handles);
old_handles->set_pop_frame_link(NULL); // clear link we won't release new_handles below
JNIHandleBlock::release_block(old_handles, thread); // may block
result = JNIHandles::make_local(thread, result_handle());
}
HOTSPOT_JNI_POPLOCALFRAME_RETURN(result);
return result;
JNI_END
JNI_ENTRY(jobject, jni_NewGlobalRef(JNIEnv *env, jobject ref))
JNIWrapper("NewGlobalRef");
HOTSPOT_JNI_NEWGLOBALREF_ENTRY(env, ref);
Handle ref_handle(thread, JNIHandles::resolve(ref));
jobject ret = JNIHandles::make_global(ref_handle);
HOTSPOT_JNI_NEWGLOBALREF_RETURN(ret);
return ret;
JNI_END
// Must be JNI_ENTRY (with HandleMark)
JNI_ENTRY_NO_PRESERVE(void, jni_DeleteGlobalRef(JNIEnv *env, jobject ref))
JNIWrapper("DeleteGlobalRef");
HOTSPOT_JNI_DELETEGLOBALREF_ENTRY(env, ref);
JNIHandles::destroy_global(ref);
HOTSPOT_JNI_DELETEGLOBALREF_RETURN();
JNI_END
JNI_QUICK_ENTRY(void, jni_DeleteLocalRef(JNIEnv *env, jobject obj))
JNIWrapper("DeleteLocalRef");
HOTSPOT_JNI_DELETELOCALREF_ENTRY(env, obj);
JNIHandles::destroy_local(obj);
HOTSPOT_JNI_DELETELOCALREF_RETURN();
JNI_END
JNI_QUICK_ENTRY(jboolean, jni_IsSameObject(JNIEnv *env, jobject r1, jobject r2))
JNIWrapper("IsSameObject");
HOTSPOT_JNI_ISSAMEOBJECT_ENTRY(env, r1, r2);
oop a = JNIHandles::resolve(r1);
oop b = JNIHandles::resolve(r2);
jboolean ret = (a == b) ? JNI_TRUE : JNI_FALSE;
HOTSPOT_JNI_ISSAMEOBJECT_RETURN(ret);
return ret;
JNI_END
JNI_ENTRY(jobject, jni_NewLocalRef(JNIEnv *env, jobject ref))
JNIWrapper("NewLocalRef");
HOTSPOT_JNI_NEWLOCALREF_ENTRY(env, ref);
jobject ret = JNIHandles::make_local(env, JNIHandles::resolve(ref));
HOTSPOT_JNI_NEWLOCALREF_RETURN(ret);
return ret;
JNI_END
JNI_LEAF(jint, jni_EnsureLocalCapacity(JNIEnv *env, jint capacity))
JNIWrapper("EnsureLocalCapacity");
HOTSPOT_JNI_ENSURELOCALCAPACITY_ENTRY(env, capacity);
jint ret;
if (capacity >= 0 &&
((MaxJNILocalCapacity <= 0) || (capacity <= MaxJNILocalCapacity))) {
ret = JNI_OK;
} else {
ret = JNI_ERR;
}
HOTSPOT_JNI_ENSURELOCALCAPACITY_RETURN(ret);
return ret;
JNI_END
// Return the Handle Type
JNI_LEAF(jobjectRefType, jni_GetObjectRefType(JNIEnv *env, jobject obj))
JNIWrapper("GetObjectRefType");
HOTSPOT_JNI_GETOBJECTREFTYPE_ENTRY(env, obj);
jobjectRefType ret = JNIInvalidRefType;
if (obj != NULL) {
ret = JNIHandles::handle_type(thread, obj);
}
HOTSPOT_JNI_GETOBJECTREFTYPE_RETURN((void *) ret);
return ret;
JNI_END
class JNI_ArgumentPusher : public SignatureIterator {
protected:
JavaCallArguments* _arguments;
virtual void get_bool () = 0;
virtual void get_char () = 0;
virtual void get_short () = 0;
virtual void get_byte () = 0;
virtual void get_int () = 0;
virtual void get_long () = 0;
virtual void get_float () = 0;
virtual void get_double () = 0;
virtual void get_object () = 0;
JNI_ArgumentPusher(Symbol* signature) : SignatureIterator(signature) {
this->_return_type = T_ILLEGAL;
_arguments = NULL;
}
public:
virtual void iterate( uint64_t fingerprint ) = 0;
void set_java_argument_object(JavaCallArguments *arguments) { _arguments = arguments; }
inline void do_bool() { if (!is_return_type()) get_bool(); }
inline void do_char() { if (!is_return_type()) get_char(); }
inline void do_short() { if (!is_return_type()) get_short(); }
inline void do_byte() { if (!is_return_type()) get_byte(); }
inline void do_int() { if (!is_return_type()) get_int(); }
inline void do_long() { if (!is_return_type()) get_long(); }
inline void do_float() { if (!is_return_type()) get_float(); }
inline void do_double() { if (!is_return_type()) get_double(); }
inline void do_object(int begin, int end) { if (!is_return_type()) get_object(); }
inline void do_array(int begin, int end) { if (!is_return_type()) get_object(); } // do_array uses get_object -- there is no get_array
inline void do_void() { }
JavaCallArguments* arguments() { return _arguments; }
void push_receiver(Handle h) { _arguments->push_oop(h); }
};
class JNI_ArgumentPusherVaArg : public JNI_ArgumentPusher {
protected:
va_list _ap;
inline void get_bool() {
// Normalize boolean arguments from native code by converting 1-255 to JNI_TRUE and
// 0 to JNI_FALSE. Boolean return values from native are normalized the same in
// TemplateInterpreterGenerator::generate_result_handler_for and
// SharedRuntime::generate_native_wrapper.
jboolean b = va_arg(_ap, jint);
_arguments->push_int((jint)(b == 0 ? JNI_FALSE : JNI_TRUE));
}
inline void get_char() { _arguments->push_int(va_arg(_ap, jint)); } // char is coerced to int when using va_arg
inline void get_short() { _arguments->push_int(va_arg(_ap, jint)); } // short is coerced to int when using va_arg
inline void get_byte() { _arguments->push_int(va_arg(_ap, jint)); } // byte is coerced to int when using va_arg
inline void get_int() { _arguments->push_int(va_arg(_ap, jint)); }
// each of these paths is exercized by the various jck Call[Static,Nonvirtual,][Void,Int,..]Method[A,V,] tests
inline void get_long() { _arguments->push_long(va_arg(_ap, jlong)); }
inline void get_float() { _arguments->push_float((jfloat)va_arg(_ap, jdouble)); } // float is coerced to double w/ va_arg
inline void get_double() { _arguments->push_double(va_arg(_ap, jdouble)); }
inline void get_object() { _arguments->push_jobject(va_arg(_ap, jobject)); }
inline void set_ap(va_list rap) {
va_copy(_ap, rap);
}
public:
JNI_ArgumentPusherVaArg(Symbol* signature, va_list rap)
: JNI_ArgumentPusher(signature) {
set_ap(rap);
}
JNI_ArgumentPusherVaArg(jmethodID method_id, va_list rap)
: JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)->signature()) {
set_ap(rap);
}
// Optimized path if we have the bitvector form of signature
void iterate( uint64_t fingerprint ) {
if (fingerprint == (uint64_t)CONST64(-1)) {
SignatureIterator::iterate(); // Must be too many arguments
} else {
_return_type = (BasicType)((fingerprint >> static_feature_size) &
result_feature_mask);
assert(fingerprint, "Fingerprint should not be 0");
fingerprint = fingerprint >> (static_feature_size + result_feature_size);
while ( 1 ) {
switch ( fingerprint & parameter_feature_mask ) {
case bool_parm:
get_bool();
break;
case char_parm:
get_char();
break;
case short_parm:
get_short();
break;
case byte_parm:
get_byte();
break;
case int_parm:
get_int();
break;
case obj_parm:
get_object();
break;
case long_parm:
get_long();
break;
case float_parm:
get_float();
break;
case double_parm:
get_double();
break;
case done_parm:
return;
break;
default:
ShouldNotReachHere();
break;
}
fingerprint >>= parameter_feature_size;
}
}
}
};
class JNI_ArgumentPusherArray : public JNI_ArgumentPusher {
protected:
const jvalue *_ap;
inline void get_bool() {
// Normalize boolean arguments from native code by converting 1-255 to JNI_TRUE and
// 0 to JNI_FALSE. Boolean return values from native are normalized the same in
// TemplateInterpreterGenerator::generate_result_handler_for and
// SharedRuntime::generate_native_wrapper.
jboolean b = (_ap++)->z;
_arguments->push_int((jint)(b == 0 ? JNI_FALSE : JNI_TRUE));
}
inline void get_char() { _arguments->push_int((jint)(_ap++)->c); }
inline void get_short() { _arguments->push_int((jint)(_ap++)->s); }
inline void get_byte() { _arguments->push_int((jint)(_ap++)->b); }
inline void get_int() { _arguments->push_int((jint)(_ap++)->i); }
inline void get_long() { _arguments->push_long((_ap++)->j); }
inline void get_float() { _arguments->push_float((_ap++)->f); }
inline void get_double() { _arguments->push_double((_ap++)->d);}
inline void get_object() { _arguments->push_jobject((_ap++)->l); }
inline void set_ap(const jvalue *rap) { _ap = rap; }
public:
JNI_ArgumentPusherArray(Symbol* signature, const jvalue *rap)
: JNI_ArgumentPusher(signature) {
set_ap(rap);
}
JNI_ArgumentPusherArray(jmethodID method_id, const jvalue *rap)
: JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)->signature()) {
set_ap(rap);
}
// Optimized path if we have the bitvector form of signature
void iterate( uint64_t fingerprint ) {
if (fingerprint == (uint64_t)CONST64(-1)) {
SignatureIterator::iterate(); // Must be too many arguments
} else {
_return_type = (BasicType)((fingerprint >> static_feature_size) &
result_feature_mask);
assert(fingerprint, "Fingerprint should not be 0");
fingerprint = fingerprint >> (static_feature_size + result_feature_size);
while ( 1 ) {
switch ( fingerprint & parameter_feature_mask ) {
case bool_parm:
get_bool();
break;
case char_parm:
get_char();
break;
case short_parm:
get_short();
break;
case byte_parm:
get_byte();
break;
case int_parm:
get_int();
break;
case obj_parm:
get_object();
break;
case long_parm:
get_long();
break;
case float_parm:
get_float();
break;
case double_parm:
get_double();
break;
case done_parm:
return;
break;
default:
ShouldNotReachHere();
break;
}
fingerprint >>= parameter_feature_size;
}
}
}
};
enum JNICallType {
JNI_STATIC,
JNI_VIRTUAL,
JNI_NONVIRTUAL
};
static void jni_invoke_static(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) {
methodHandle method(THREAD, Method::resolve_jmethod_id(method_id));
// Create object to hold arguments for the JavaCall, and associate it with
// the jni parser
ResourceMark rm(THREAD);
int number_of_parameters = method->size_of_parameters();
JavaCallArguments java_args(number_of_parameters);
args->set_java_argument_object(&java_args);
assert(method->is_static(), "method should be static");
// Fill out JavaCallArguments object
args->iterate( Fingerprinter(method).fingerprint() );
// Initialize result type
result->set_type(args->get_ret_type());
// Invoke the method. Result is returned as oop.
JavaCalls::call(result, method, &java_args, CHECK);
// Convert result
if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY) {
result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject()));
}
}
static void jni_invoke_nonstatic(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) {
oop recv = JNIHandles::resolve(receiver);
if (recv == NULL) {
THROW(vmSymbols::java_lang_NullPointerException());
}
Handle h_recv(THREAD, recv);
int number_of_parameters;
Method* selected_method;
{
Method* m = Method::resolve_jmethod_id(method_id);
number_of_parameters = m->size_of_parameters();
Klass* holder = m->method_holder();
if (call_type != JNI_VIRTUAL) {
selected_method = m;
} else if (!m->has_itable_index()) {
// non-interface call -- for that little speed boost, don't handlize
debug_only(NoSafepointVerifier nosafepoint;)
// jni_GetMethodID makes sure class is linked and initialized
// so m should have a valid vtable index.
assert(m->valid_vtable_index(), "no valid vtable index");
int vtbl_index = m->vtable_index();
if (vtbl_index != Method::nonvirtual_vtable_index) {
selected_method = h_recv->klass()->method_at_vtable(vtbl_index);
} else {
// final method
selected_method = m;
}
} else {
// interface call
int itbl_index = m->itable_index();
Klass* k = h_recv->klass();
selected_method = InstanceKlass::cast(k)->method_at_itable(holder, itbl_index, CHECK);
}
}
methodHandle method(THREAD, selected_method);
// Create object to hold arguments for the JavaCall, and associate it with
// the jni parser
ResourceMark rm(THREAD);
JavaCallArguments java_args(number_of_parameters);
args->set_java_argument_object(&java_args);
// handle arguments
assert(!method->is_static(), "method %s should not be static", method->name_and_sig_as_C_string());
args->push_receiver(h_recv); // Push jobject handle
// Fill out JavaCallArguments object
args->iterate( Fingerprinter(method).fingerprint() );
// Initialize result type
result->set_type(args->get_ret_type());
// Invoke the method. Result is returned as oop.
JavaCalls::call(result, method, &java_args, CHECK);
// Convert result
if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY) {
result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject()));
}
}
static instanceOop alloc_object(jclass clazz, TRAPS) {
Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
if (k == NULL) {
ResourceMark rm(THREAD);
THROW_(vmSymbols::java_lang_InstantiationException(), NULL);
}
k->check_valid_for_instantiation(false, CHECK_NULL);
k->initialize(CHECK_NULL);
instanceOop ih = InstanceKlass::cast(k)->allocate_instance(THREAD);
return ih;
}
DT_RETURN_MARK_DECL(AllocObject, jobject
, HOTSPOT_JNI_ALLOCOBJECT_RETURN(_ret_ref));
JNI_ENTRY(jobject, jni_AllocObject(JNIEnv *env, jclass clazz))
JNIWrapper("AllocObject");
HOTSPOT_JNI_ALLOCOBJECT_ENTRY(env, clazz);
jobject ret = NULL;
DT_RETURN_MARK(AllocObject, jobject, (const jobject&)ret);
instanceOop i = alloc_object(clazz, CHECK_NULL);
ret = JNIHandles::make_local(env, i);
return ret;
JNI_END
DT_RETURN_MARK_DECL(NewObjectA, jobject
, HOTSPOT_JNI_NEWOBJECTA_RETURN(_ret_ref));
JNI_ENTRY(jobject, jni_NewObjectA(JNIEnv *env, jclass clazz, jmethodID methodID, const jvalue *args))
JNIWrapper("NewObjectA");
HOTSPOT_JNI_NEWOBJECTA_ENTRY(env, clazz, (uintptr_t) methodID);
jobject obj = NULL;
DT_RETURN_MARK(NewObjectA, jobject, (const jobject)obj);
instanceOop i = alloc_object(clazz, CHECK_NULL);
obj = JNIHandles::make_local(env, i);
JavaValue jvalue(T_VOID);
JNI_ArgumentPusherArray ap(methodID, args);
jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
return obj;
JNI_END
DT_RETURN_MARK_DECL(NewObjectV, jobject
, HOTSPOT_JNI_NEWOBJECTV_RETURN(_ret_ref));
JNI_ENTRY(jobject, jni_NewObjectV(JNIEnv *env, jclass clazz, jmethodID methodID, va_list args))
JNIWrapper("NewObjectV");
HOTSPOT_JNI_NEWOBJECTV_ENTRY(env, clazz, (uintptr_t) methodID);
jobject obj = NULL;
DT_RETURN_MARK(NewObjectV, jobject, (const jobject&)obj);
instanceOop i = alloc_object(clazz, CHECK_NULL);
obj = JNIHandles::make_local(env, i);
JavaValue jvalue(T_VOID);
JNI_ArgumentPusherVaArg ap(methodID, args);
jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
return obj;
JNI_END
DT_RETURN_MARK_DECL(NewObject, jobject
, HOTSPOT_JNI_NEWOBJECT_RETURN(_ret_ref));
JNI_ENTRY(jobject, jni_NewObject(JNIEnv *env, jclass clazz, jmethodID methodID, ...))
JNIWrapper("NewObject");
HOTSPOT_JNI_NEWOBJECT_ENTRY(env, clazz, (uintptr_t) methodID);
jobject obj = NULL;
DT_RETURN_MARK(NewObject, jobject, (const jobject&)obj);
instanceOop i = alloc_object(clazz, CHECK_NULL);
obj = JNIHandles::make_local(env, i);
va_list args;
va_start(args, methodID);
JavaValue jvalue(T_VOID);
JNI_ArgumentPusherVaArg ap(methodID, args);
jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
va_end(args);
return obj;
JNI_END
JNI_ENTRY(jclass, jni_GetObjectClass(JNIEnv *env, jobject obj))
JNIWrapper("GetObjectClass");
HOTSPOT_JNI_GETOBJECTCLASS_ENTRY(env, obj);
Klass* k = JNIHandles::resolve_non_null(obj)->klass();
jclass ret =
(jclass) JNIHandles::make_local(env, k->java_mirror());
HOTSPOT_JNI_GETOBJECTCLASS_RETURN(ret);
return ret;
JNI_END
JNI_QUICK_ENTRY(jboolean, jni_IsInstanceOf(JNIEnv *env, jobject obj, jclass clazz))
JNIWrapper("IsInstanceOf");
HOTSPOT_JNI_ISINSTANCEOF_ENTRY(env, obj, clazz);
jboolean ret = JNI_TRUE;
if (obj != NULL) {
ret = JNI_FALSE;
Klass* k = java_lang_Class::as_Klass(
JNIHandles::resolve_non_null(clazz));
if (k != NULL) {
ret = JNIHandles::resolve_non_null(obj)->is_a(k) ? JNI_TRUE : JNI_FALSE;
}
}
HOTSPOT_JNI_ISINSTANCEOF_RETURN(ret);
return ret;
JNI_END
static jmethodID get_method_id(JNIEnv *env, jclass clazz, const char *name_str,
const char *sig, bool is_static, TRAPS) {
// %%%% This code should probably just call into a method in the LinkResolver
//
// The class should have been loaded (we have an instance of the class
// passed in) so the method and signature should already be in the symbol
// table. If they're not there, the method doesn't exist.
const char *name_to_probe = (name_str == NULL)
? vmSymbols::object_initializer_name()->as_C_string()
: name_str;
TempNewSymbol name = SymbolTable::probe(name_to_probe, (int)strlen(name_to_probe));
TempNewSymbol signature = SymbolTable::probe(sig, (int)strlen(sig));
if (name == NULL || signature == NULL) {
THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str);
}
// Throw a NoSuchMethodError exception if we have an instance of a
// primitive java.lang.Class
if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(clazz))) {
THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str);
}
Klass* klass = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
// Make sure class is linked and initialized before handing id's out to
// Method*s.
klass->initialize(CHECK_NULL);
Method* m;
if (name == vmSymbols::object_initializer_name() ||
name == vmSymbols::class_initializer_name()) {
// Never search superclasses for constructors
if (klass->is_instance_klass()) {
m = InstanceKlass::cast(klass)->find_method(name, signature);
} else {
m = NULL;
}
} else {
m = klass->lookup_method(name, signature);
if (m == NULL && klass->is_instance_klass()) {
m = InstanceKlass::cast(klass)->lookup_method_in_ordered_interfaces(name, signature);
}
}
if (m == NULL || (m->is_static() != is_static)) {
THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str);
}
return m->jmethod_id();
}
JNI_ENTRY(jmethodID, jni_GetMethodID(JNIEnv *env, jclass clazz,
const char *name, const char *sig))
JNIWrapper("GetMethodID");
HOTSPOT_JNI_GETMETHODID_ENTRY(env, clazz, (char *) name, (char *) sig);
jmethodID ret = get_method_id(env, clazz, name, sig, false, thread);
HOTSPOT_JNI_GETMETHODID_RETURN((uintptr_t) ret);
return ret;
JNI_END
JNI_ENTRY(jmethodID, jni_GetStaticMethodID(JNIEnv *env, jclass clazz,
const char *name, const char *sig))
JNIWrapper("GetStaticMethodID");
HOTSPOT_JNI_GETSTATICMETHODID_ENTRY(env, (char *) clazz, (char *) name, (char *)sig);
jmethodID ret = get_method_id(env, clazz, name, sig, true, thread);
HOTSPOT_JNI_GETSTATICMETHODID_RETURN((uintptr_t) ret);
return ret;
JNI_END
//
// Calling Methods
//
#define DEFINE_CALLMETHOD(ResultType, Result, Tag \
, EntryProbe, ReturnProbe) \
\
DT_RETURN_MARK_DECL_FOR(Result, Call##Result##Method, ResultType \
, ReturnProbe); \
\
JNI_ENTRY(ResultType, \
jni_Call##Result##Method(JNIEnv *env, jobject obj, jmethodID methodID, ...)) \
JNIWrapper("Call" XSTR(Result) "Method"); \
\
EntryProbe; \
ResultType ret = 0;\
DT_RETURN_MARK_FOR(Result, Call##Result##Method, ResultType, \
(const ResultType&)ret);\
\
va_list args; \
va_start(args, methodID); \
JavaValue jvalue(Tag); \
JNI_ArgumentPusherVaArg ap(methodID, args); \
jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
va_end(args); \
ret = jvalue.get_##ResultType(); \
return ret;\
JNI_END
// the runtime type of subword integral basic types is integer
DEFINE_CALLMETHOD(jboolean, Boolean, T_BOOLEAN
, HOTSPOT_JNI_CALLBOOLEANMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
HOTSPOT_JNI_CALLBOOLEANMETHOD_RETURN(_ret_ref))
DEFINE_CALLMETHOD(jbyte, Byte, T_BYTE
, HOTSPOT_JNI_CALLBYTEMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
HOTSPOT_JNI_CALLBYTEMETHOD_RETURN(_ret_ref))
DEFINE_CALLMETHOD(jchar, Char, T_CHAR
, HOTSPOT_JNI_CALLCHARMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
HOTSPOT_JNI_CALLCHARMETHOD_RETURN(_ret_ref))
DEFINE_CALLMETHOD(jshort, Short, T_SHORT
, HOTSPOT_JNI_CALLSHORTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
HOTSPOT_JNI_CALLSHORTMETHOD_RETURN(_ret_ref))
DEFINE_CALLMETHOD(jobject, Object, T_OBJECT
, HOTSPOT_JNI_CALLOBJECTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
HOTSPOT_JNI_CALLOBJECTMETHOD_RETURN(_ret_ref))
DEFINE_CALLMETHOD(jint, Int, T_INT,
HOTSPOT_JNI_CALLINTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
HOTSPOT_JNI_CALLINTMETHOD_RETURN(_ret_ref))
DEFINE_CALLMETHOD(jlong, Long, T_LONG
, HOTSPOT_JNI_CALLLONGMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
HOTSPOT_JNI_CALLLONGMETHOD_RETURN(_ret_ref))
// Float and double probes don't return value because dtrace doesn't currently support it
DEFINE_CALLMETHOD(jfloat, Float, T_FLOAT
, HOTSPOT_JNI_CALLFLOATMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
HOTSPOT_JNI_CALLFLOATMETHOD_RETURN())
DEFINE_CALLMETHOD(jdouble, Double, T_DOUBLE
, HOTSPOT_JNI_CALLDOUBLEMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
HOTSPOT_JNI_CALLDOUBLEMETHOD_RETURN())
#define DEFINE_CALLMETHODV(ResultType, Result, Tag \
, EntryProbe, ReturnProbe) \
\
DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodV, ResultType \
, ReturnProbe); \
\
JNI_ENTRY(ResultType, \
jni_Call##Result##MethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) \
JNIWrapper("Call" XSTR(Result) "MethodV"); \
\
EntryProbe;\
ResultType ret = 0;\
DT_RETURN_MARK_FOR(Result, Call##Result##MethodV, ResultType, \
(const ResultType&)ret);\
\
JavaValue jvalue(Tag); \
JNI_ArgumentPusherVaArg ap(methodID, args); \
jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
ret = jvalue.get_##ResultType(); \
return ret;\
JNI_END
// the runtime type of subword integral basic types is integer
DEFINE_CALLMETHODV(jboolean, Boolean, T_BOOLEAN
, HOTSPOT_JNI_CALLBOOLEANMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
HOTSPOT_JNI_CALLBOOLEANMETHODV_RETURN(_ret_ref))
DEFINE_CALLMETHODV(jbyte, Byte, T_BYTE
, HOTSPOT_JNI_CALLBYTEMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
HOTSPOT_JNI_CALLBYTEMETHODV_RETURN(_ret_ref))
DEFINE_CALLMETHODV(jchar, Char, T_CHAR
, HOTSPOT_JNI_CALLCHARMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
HOTSPOT_JNI_CALLCHARMETHODV_RETURN(_ret_ref))
DEFINE_CALLMETHODV(jshort, Short, T_SHORT
, HOTSPOT_JNI_CALLSHORTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
HOTSPOT_JNI_CALLSHORTMETHODV_RETURN(_ret_ref))
DEFINE_CALLMETHODV(jobject, Object, T_OBJECT
, HOTSPOT_JNI_CALLOBJECTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
HOTSPOT_JNI_CALLOBJECTMETHODV_RETURN(_ret_ref))
DEFINE_CALLMETHODV(jint, Int, T_INT,
HOTSPOT_JNI_CALLINTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
HOTSPOT_JNI_CALLINTMETHODV_RETURN(_ret_ref))
DEFINE_CALLMETHODV(jlong, Long, T_LONG
, HOTSPOT_JNI_CALLLONGMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
HOTSPOT_JNI_CALLLONGMETHODV_RETURN(_ret_ref))
// Float and double probes don't return value because dtrace doesn't currently support it
DEFINE_CALLMETHODV(jfloat, Float, T_FLOAT
, HOTSPOT_JNI_CALLFLOATMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
HOTSPOT_JNI_CALLFLOATMETHODV_RETURN())
DEFINE_CALLMETHODV(jdouble, Double, T_DOUBLE
, HOTSPOT_JNI_CALLDOUBLEMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
HOTSPOT_JNI_CALLDOUBLEMETHODV_RETURN())
#define DEFINE_CALLMETHODA(ResultType, Result, Tag \
, EntryProbe, ReturnProbe) \
\
DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodA, ResultType \
, ReturnProbe); \
\
JNI_ENTRY(ResultType, \
jni_Call##Result##MethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) \
JNIWrapper("Call" XSTR(Result) "MethodA"); \
EntryProbe; \
ResultType ret = 0;\
DT_RETURN_MARK_FOR(Result, Call##Result##MethodA, ResultType, \
(const ResultType&)ret);\
\
JavaValue jvalue(Tag); \
JNI_ArgumentPusherArray ap(methodID, args); \
jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
ret = jvalue.get_##ResultType(); \
return ret;\
JNI_END
// the runtime type of subword integral basic types is integer
DEFINE_CALLMETHODA(jboolean, Boolean, T_BOOLEAN
, HOTSPOT_JNI_CALLBOOLEANMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
HOTSPOT_JNI_CALLBOOLEANMETHODA_RETURN(_ret_ref))
DEFINE_CALLMETHODA(jbyte, Byte, T_BYTE
, HOTSPOT_JNI_CALLBYTEMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
HOTSPOT_JNI_CALLBYTEMETHODA_RETURN(_ret_ref))
DEFINE_CALLMETHODA(jchar, Char, T_CHAR
, HOTSPOT_JNI_CALLCHARMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
HOTSPOT_JNI_CALLCHARMETHODA_RETURN(_ret_ref))
DEFINE_CALLMETHODA(jshort, Short, T_SHORT
, HOTSPOT_JNI_CALLSHORTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
HOTSPOT_JNI_CALLSHORTMETHODA_RETURN(_ret_ref))
DEFINE_CALLMETHODA(jobject, Object, T_OBJECT
, HOTSPOT_JNI_CALLOBJECTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
HOTSPOT_JNI_CALLOBJECTMETHODA_RETURN(_ret_ref))
DEFINE_CALLMETHODA(jint, Int, T_INT,
HOTSPOT_JNI_CALLINTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
HOTSPOT_JNI_CALLINTMETHODA_RETURN(_ret_ref))
DEFINE_CALLMETHODA(jlong, Long, T_LONG
, HOTSPOT_JNI_CALLLONGMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
HOTSPOT_JNI_CALLLONGMETHODA_RETURN(_ret_ref))
// Float and double probes don't return value because dtrace doesn't currently support it
DEFINE_CALLMETHODA(jfloat, Float, T_FLOAT
, HOTSPOT_JNI_CALLFLOATMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
HOTSPOT_JNI_CALLFLOATMETHODA_RETURN())
DEFINE_CALLMETHODA(jdouble, Double, T_DOUBLE
, HOTSPOT_JNI_CALLDOUBLEMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
HOTSPOT_JNI_CALLDOUBLEMETHODA_RETURN())
DT_VOID_RETURN_MARK_DECL(CallVoidMethod, HOTSPOT_JNI_CALLVOIDMETHOD_RETURN());
DT_VOID_RETURN_MARK_DECL(CallVoidMethodV, HOTSPOT_JNI_CALLVOIDMETHODV_RETURN());
DT_VOID_RETURN_MARK_DECL(CallVoidMethodA, HOTSPOT_JNI_CALLVOIDMETHODA_RETURN());
JNI_ENTRY(void, jni_CallVoidMethod(JNIEnv *env, jobject obj, jmethodID methodID, ...))
JNIWrapper("CallVoidMethod");
HOTSPOT_JNI_CALLVOIDMETHOD_ENTRY(env, obj, (uintptr_t) methodID);
DT_VOID_RETURN_MARK(CallVoidMethod);
va_list args;
va_start(args, methodID);
JavaValue jvalue(T_VOID);
JNI_ArgumentPusherVaArg ap(methodID, args);
jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
va_end(args);
JNI_END
JNI_ENTRY(void, jni_CallVoidMethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args))
JNIWrapper("CallVoidMethodV");
HOTSPOT_JNI_CALLVOIDMETHODV_ENTRY(env, obj, (uintptr_t) methodID);
DT_VOID_RETURN_MARK(CallVoidMethodV);
JavaValue jvalue(T_VOID);
JNI_ArgumentPusherVaArg ap(methodID, args);
jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
JNI_END
JNI_ENTRY(void, jni_CallVoidMethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args))
JNIWrapper("CallVoidMethodA");
HOTSPOT_JNI_CALLVOIDMETHODA_ENTRY(env, obj, (uintptr_t) methodID);
DT_VOID_RETURN_MARK(CallVoidMethodA);
JavaValue jvalue(T_VOID);
JNI_ArgumentPusherArray ap(methodID, args);
jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
JNI_END
#define DEFINE_CALLNONVIRTUALMETHOD(ResultType, Result, Tag \
, EntryProbe, ReturnProbe) \
\
DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##Method, ResultType \
, ReturnProbe);\
\
JNI_ENTRY(ResultType, \
jni_CallNonvirtual##Result##Method(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) \
JNIWrapper("CallNonvitual" XSTR(Result) "Method"); \
\
EntryProbe;\
ResultType ret;\
DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##Method, ResultType, \
(const ResultType&)ret);\
\
va_list args; \
va_start(args, methodID); \
JavaValue jvalue(Tag); \
JNI_ArgumentPusherVaArg ap(methodID, args); \
jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
va_end(args); \
ret = jvalue.get_##ResultType(); \
return ret;\
JNI_END
// the runtime type of subword integral basic types is integer
DEFINE_CALLNONVIRTUALMETHOD(jboolean, Boolean, T_BOOLEAN
, HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_RETURN(_ret_ref))
DEFINE_CALLNONVIRTUALMETHOD(jbyte, Byte, T_BYTE
, HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_RETURN(_ret_ref))
DEFINE_CALLNONVIRTUALMETHOD(jchar, Char, T_CHAR
, HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_RETURN(_ret_ref))
DEFINE_CALLNONVIRTUALMETHOD(jshort, Short, T_SHORT
, HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_RETURN(_ret_ref))
DEFINE_CALLNONVIRTUALMETHOD(jobject, Object, T_OBJECT
, HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_RETURN(_ret_ref))
DEFINE_CALLNONVIRTUALMETHOD(jint, Int, T_INT
, HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_RETURN(_ret_ref))
DEFINE_CALLNONVIRTUALMETHOD(jlong, Long, T_LONG
, HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
// Float and double probes don't return value because dtrace doesn't currently support it
HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_RETURN(_ret_ref))
DEFINE_CALLNONVIRTUALMETHOD(jfloat, Float, T_FLOAT
, HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_RETURN())
DEFINE_CALLNONVIRTUALMETHOD(jdouble, Double, T_DOUBLE
, HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_RETURN())
#define DEFINE_CALLNONVIRTUALMETHODV(ResultType, Result, Tag \
, EntryProbe, ReturnProbe) \
\
DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodV, ResultType \
, ReturnProbe);\
\
JNI_ENTRY(ResultType, \
jni_CallNonvirtual##Result##MethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) \
JNIWrapper("CallNonvitual" XSTR(Result) "MethodV"); \
\
EntryProbe;\
ResultType ret;\
DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodV, ResultType, \
(const ResultType&)ret);\
\
JavaValue jvalue(Tag); \
JNI_ArgumentPusherVaArg ap(methodID, args); \
jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
ret = jvalue.get_##ResultType(); \
return ret;\
JNI_END
// the runtime type of subword integral basic types is integer
DEFINE_CALLNONVIRTUALMETHODV(jboolean, Boolean, T_BOOLEAN
, HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_RETURN(_ret_ref))
DEFINE_CALLNONVIRTUALMETHODV(jbyte, Byte, T_BYTE
, HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_RETURN(_ret_ref))
DEFINE_CALLNONVIRTUALMETHODV(jchar, Char, T_CHAR
, HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_RETURN(_ret_ref))
DEFINE_CALLNONVIRTUALMETHODV(jshort, Short, T_SHORT
, HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_RETURN(_ret_ref))
DEFINE_CALLNONVIRTUALMETHODV(jobject, Object, T_OBJECT
, HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_RETURN(_ret_ref))
DEFINE_CALLNONVIRTUALMETHODV(jint, Int, T_INT
, HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_RETURN(_ret_ref))
DEFINE_CALLNONVIRTUALMETHODV(jlong, Long, T_LONG
, HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
// Float and double probes don't return value because dtrace doesn't currently support it
HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_RETURN(_ret_ref))
DEFINE_CALLNONVIRTUALMETHODV(jfloat, Float, T_FLOAT
, HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_RETURN())
DEFINE_CALLNONVIRTUALMETHODV(jdouble, Double, T_DOUBLE
, HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_RETURN())
#define DEFINE_CALLNONVIRTUALMETHODA(ResultType, Result, Tag \
, EntryProbe, ReturnProbe) \
\
DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodA, ResultType \
, ReturnProbe);\
\
JNI_ENTRY(ResultType, \
jni_CallNonvirtual##Result##MethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) \
JNIWrapper("CallNonvitual" XSTR(Result) "MethodA"); \
\
EntryProbe;\
ResultType ret;\
DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodA, ResultType, \
(const ResultType&)ret);\
\
JavaValue jvalue(Tag); \
JNI_ArgumentPusherArray ap(methodID, args); \
jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
ret = jvalue.get_##ResultType(); \
return ret;\
JNI_END
// the runtime type of subword integral basic types is integer
DEFINE_CALLNONVIRTUALMETHODA(jboolean, Boolean, T_BOOLEAN
, HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_RETURN(_ret_ref))
DEFINE_CALLNONVIRTUALMETHODA(jbyte, Byte, T_BYTE
, HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_RETURN(_ret_ref))
DEFINE_CALLNONVIRTUALMETHODA(jchar, Char, T_CHAR
, HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_RETURN(_ret_ref))
DEFINE_CALLNONVIRTUALMETHODA(jshort, Short, T_SHORT
, HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_RETURN(_ret_ref))
DEFINE_CALLNONVIRTUALMETHODA(jobject, Object, T_OBJECT
, HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_RETURN(_ret_ref))
DEFINE_CALLNONVIRTUALMETHODA(jint, Int, T_INT
, HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_RETURN(_ret_ref))
DEFINE_CALLNONVIRTUALMETHODA(jlong, Long, T_LONG
, HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
// Float and double probes don't return value because dtrace doesn't currently support it
HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_RETURN(_ret_ref))
DEFINE_CALLNONVIRTUALMETHODA(jfloat, Float, T_FLOAT
, HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_RETURN())
DEFINE_CALLNONVIRTUALMETHODA(jdouble, Double, T_DOUBLE
, HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_RETURN())
DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethod
, HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_RETURN());
DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodV
, HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_RETURN());
DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodA
, HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_RETURN());
JNI_ENTRY(void, jni_CallNonvirtualVoidMethod(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...))
JNIWrapper("CallNonvirtualVoidMethod");
HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_ENTRY(env, obj, cls, (uintptr_t) methodID);
DT_VOID_RETURN_MARK(CallNonvirtualVoidMethod);
va_list args;
va_start(args, methodID);
JavaValue jvalue(T_VOID);
JNI_ArgumentPusherVaArg ap(methodID, args);
jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
va_end(args);
JNI_END
JNI_ENTRY(void, jni_CallNonvirtualVoidMethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args))
JNIWrapper("CallNonvirtualVoidMethodV");
HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_ENTRY(
env, obj, cls, (uintptr_t) methodID);
DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodV);
JavaValue jvalue(T_VOID);
JNI_ArgumentPusherVaArg ap(methodID, args);
jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
JNI_END
JNI_ENTRY(void, jni_CallNonvirtualVoidMethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args))
JNIWrapper("CallNonvirtualVoidMethodA");
HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_ENTRY(
env, obj, cls, (uintptr_t) methodID);
DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodA);
JavaValue jvalue(T_VOID);
JNI_ArgumentPusherArray ap(methodID, args);
jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
JNI_END
#define DEFINE_CALLSTATICMETHOD(ResultType, Result, Tag \
, EntryProbe, ResultProbe) \
\
DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##Method, ResultType \
, ResultProbe); \
\
JNI_ENTRY(ResultType, \
jni_CallStatic##Result##Method(JNIEnv *env, jclass cls, jmethodID methodID, ...)) \
JNIWrapper("CallStatic" XSTR(Result) "Method"); \
\
EntryProbe; \
ResultType ret = 0;\
DT_RETURN_MARK_FOR(Result, CallStatic##Result##Method, ResultType, \
(const ResultType&)ret);\
\
va_list args; \
va_start(args, methodID); \
JavaValue jvalue(Tag); \
JNI_ArgumentPusherVaArg ap(methodID, args); \
jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
va_end(args); \
ret = jvalue.get_##ResultType(); \
return ret;\
JNI_END
// the runtime type of subword integral basic types is integer
DEFINE_CALLSTATICMETHOD(jboolean, Boolean, T_BOOLEAN
, HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_RETURN(_ret_ref));
DEFINE_CALLSTATICMETHOD(jbyte, Byte, T_BYTE
, HOTSPOT_JNI_CALLSTATICBYTEMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
HOTSPOT_JNI_CALLSTATICBYTEMETHOD_RETURN(_ret_ref));
DEFINE_CALLSTATICMETHOD(jchar, Char, T_CHAR
, HOTSPOT_JNI_CALLSTATICCHARMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
HOTSPOT_JNI_CALLSTATICCHARMETHOD_RETURN(_ret_ref));
DEFINE_CALLSTATICMETHOD(jshort, Short, T_SHORT
, HOTSPOT_JNI_CALLSTATICSHORTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
HOTSPOT_JNI_CALLSTATICSHORTMETHOD_RETURN(_ret_ref));
DEFINE_CALLSTATICMETHOD(jobject, Object, T_OBJECT
, HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_RETURN(_ret_ref));
DEFINE_CALLSTATICMETHOD(jint, Int, T_INT
, HOTSPOT_JNI_CALLSTATICINTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
HOTSPOT_JNI_CALLSTATICINTMETHOD_RETURN(_ret_ref));
DEFINE_CALLSTATICMETHOD(jlong, Long, T_LONG
, HOTSPOT_JNI_CALLSTATICLONGMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
HOTSPOT_JNI_CALLSTATICLONGMETHOD_RETURN(_ret_ref));
// Float and double probes don't return value because dtrace doesn't currently support it
DEFINE_CALLSTATICMETHOD(jfloat, Float, T_FLOAT
, HOTSPOT_JNI_CALLSTATICFLOATMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
HOTSPOT_JNI_CALLSTATICFLOATMETHOD_RETURN());
DEFINE_CALLSTATICMETHOD(jdouble, Double, T_DOUBLE
, HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_RETURN());
#define DEFINE_CALLSTATICMETHODV(ResultType, Result, Tag \
, EntryProbe, ResultProbe) \
\
DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodV, ResultType \
, ResultProbe); \
\
JNI_ENTRY(ResultType, \
jni_CallStatic##Result##MethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) \
JNIWrapper("CallStatic" XSTR(Result) "MethodV"); \
\
EntryProbe; \
ResultType ret = 0;\
DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodV, ResultType, \
(const ResultType&)ret);\
\
JavaValue jvalue(Tag); \
JNI_ArgumentPusherVaArg ap(methodID, args); \
/* Make sure class is initialized before trying to invoke its method */ \
Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); \
k->initialize(CHECK_0); \
jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
va_end(args); \
ret = jvalue.get_##ResultType(); \
return ret;\
JNI_END
// the runtime type of subword integral basic types is integer
DEFINE_CALLSTATICMETHODV(jboolean, Boolean, T_BOOLEAN
, HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_RETURN(_ret_ref));
DEFINE_CALLSTATICMETHODV(jbyte, Byte, T_BYTE
, HOTSPOT_JNI_CALLSTATICBYTEMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
HOTSPOT_JNI_CALLSTATICBYTEMETHODV_RETURN(_ret_ref));
DEFINE_CALLSTATICMETHODV(jchar, Char, T_CHAR
, HOTSPOT_JNI_CALLSTATICCHARMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
HOTSPOT_JNI_CALLSTATICCHARMETHODV_RETURN(_ret_ref));
DEFINE_CALLSTATICMETHODV(jshort, Short, T_SHORT
, HOTSPOT_JNI_CALLSTATICSHORTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
HOTSPOT_JNI_CALLSTATICSHORTMETHODV_RETURN(_ret_ref));
DEFINE_CALLSTATICMETHODV(jobject, Object, T_OBJECT
, HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_RETURN(_ret_ref));
DEFINE_CALLSTATICMETHODV(jint, Int, T_INT
, HOTSPOT_JNI_CALLSTATICINTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
HOTSPOT_JNI_CALLSTATICINTMETHODV_RETURN(_ret_ref));
DEFINE_CALLSTATICMETHODV(jlong, Long, T_LONG
, HOTSPOT_JNI_CALLSTATICLONGMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
HOTSPOT_JNI_CALLSTATICLONGMETHODV_RETURN(_ret_ref));
// Float and double probes don't return value because dtrace doesn't currently support it
DEFINE_CALLSTATICMETHODV(jfloat, Float, T_FLOAT
, HOTSPOT_JNI_CALLSTATICFLOATMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
HOTSPOT_JNI_CALLSTATICFLOATMETHODV_RETURN());
DEFINE_CALLSTATICMETHODV(jdouble, Double, T_DOUBLE
, HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_RETURN());
#define DEFINE_CALLSTATICMETHODA(ResultType, Result, Tag \
, EntryProbe, ResultProbe) \
\
DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodA, ResultType \
, ResultProbe); \
\
JNI_ENTRY(ResultType, \
jni_CallStatic##Result##MethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) \
JNIWrapper("CallStatic" XSTR(Result) "MethodA"); \
\
EntryProbe; \
ResultType ret = 0;\
DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodA, ResultType, \
(const ResultType&)ret);\
\
JavaValue jvalue(Tag); \
JNI_ArgumentPusherArray ap(methodID, args); \
jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
ret = jvalue.get_##ResultType(); \
return ret;\
JNI_END
// the runtime type of subword integral basic types is integer
DEFINE_CALLSTATICMETHODA(jboolean, Boolean, T_BOOLEAN
, HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_RETURN(_ret_ref));
DEFINE_CALLSTATICMETHODA(jbyte, Byte, T_BYTE
, HOTSPOT_JNI_CALLSTATICBYTEMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
HOTSPOT_JNI_CALLSTATICBYTEMETHODA_RETURN(_ret_ref));
DEFINE_CALLSTATICMETHODA(jchar, Char, T_CHAR
, HOTSPOT_JNI_CALLSTATICCHARMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
HOTSPOT_JNI_CALLSTATICCHARMETHODA_RETURN(_ret_ref));
DEFINE_CALLSTATICMETHODA(jshort, Short, T_SHORT
, HOTSPOT_JNI_CALLSTATICSHORTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
HOTSPOT_JNI_CALLSTATICSHORTMETHODA_RETURN(_ret_ref));
DEFINE_CALLSTATICMETHODA(jobject, Object, T_OBJECT
, HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_RETURN(_ret_ref));
DEFINE_CALLSTATICMETHODA(jint, Int, T_INT
, HOTSPOT_JNI_CALLSTATICINTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
HOTSPOT_JNI_CALLSTATICINTMETHODA_RETURN(_ret_ref));
DEFINE_CALLSTATICMETHODA(jlong, Long, T_LONG
, HOTSPOT_JNI_CALLSTATICLONGMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
HOTSPOT_JNI_CALLSTATICLONGMETHODA_RETURN(_ret_ref));
// Float and double probes don't return value because dtrace doesn't currently support it
DEFINE_CALLSTATICMETHODA(jfloat, Float, T_FLOAT
, HOTSPOT_JNI_CALLSTATICFLOATMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
HOTSPOT_JNI_CALLSTATICFLOATMETHODA_RETURN());
DEFINE_CALLSTATICMETHODA(jdouble, Double, T_DOUBLE
, HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_RETURN());
DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethod
, HOTSPOT_JNI_CALLSTATICVOIDMETHOD_RETURN());
DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodV
, HOTSPOT_JNI_CALLSTATICVOIDMETHODV_RETURN());
DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodA
, HOTSPOT_JNI_CALLSTATICVOIDMETHODA_RETURN());
JNI_ENTRY(void, jni_CallStaticVoidMethod(JNIEnv *env, jclass cls, jmethodID methodID, ...))
JNIWrapper("CallStaticVoidMethod");
HOTSPOT_JNI_CALLSTATICVOIDMETHOD_ENTRY(env, cls, (uintptr_t) methodID);
DT_VOID_RETURN_MARK(CallStaticVoidMethod);
va_list args;
va_start(args, methodID);
JavaValue jvalue(T_VOID);
JNI_ArgumentPusherVaArg ap(methodID, args);
jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
va_end(args);
JNI_END
JNI_ENTRY(void, jni_CallStaticVoidMethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args))
JNIWrapper("CallStaticVoidMethodV");
HOTSPOT_JNI_CALLSTATICVOIDMETHODV_ENTRY(env, cls, (uintptr_t) methodID);
DT_VOID_RETURN_MARK(CallStaticVoidMethodV);
JavaValue jvalue(T_VOID);
JNI_ArgumentPusherVaArg ap(methodID, args);
jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
JNI_END
JNI_ENTRY(void, jni_CallStaticVoidMethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args))
JNIWrapper("CallStaticVoidMethodA");
HOTSPOT_JNI_CALLSTATICVOIDMETHODA_ENTRY(env, cls, (uintptr_t) methodID);
DT_VOID_RETURN_MARK(CallStaticVoidMethodA);
JavaValue jvalue(T_VOID);
JNI_ArgumentPusherArray ap(methodID, args);
jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
JNI_END
//
// Accessing Fields
//
DT_RETURN_MARK_DECL(GetFieldID, jfieldID
, HOTSPOT_JNI_GETFIELDID_RETURN((uintptr_t)_ret_ref));
JNI_ENTRY(jfieldID, jni_GetFieldID(JNIEnv *env, jclass clazz,
const char *name, const char *sig))
JNIWrapper("GetFieldID");
HOTSPOT_JNI_GETFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig);
jfieldID ret = 0;
DT_RETURN_MARK(GetFieldID, jfieldID, (const jfieldID&)ret);
// The class should have been loaded (we have an instance of the class
// passed in) so the field and signature should already be in the symbol
// table. If they're not there, the field doesn't exist.
TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name));
TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig));
if (fieldname == NULL || signame == NULL) {
THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
}
Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
// Make sure class is initialized before handing id's out to fields
k->initialize(CHECK_NULL);
fieldDescriptor fd;
if (!k->is_instance_klass() ||
!InstanceKlass::cast(k)->find_field(fieldname, signame, false, &fd)) {
THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
}
// A jfieldID for a non-static field is simply the offset of the field within the instanceOop
// It may also have hash bits for k, if VerifyJNIFields is turned on.
ret = jfieldIDWorkaround::to_instance_jfieldID(k, fd.offset());
return ret;
JNI_END
JNI_ENTRY(jobject, jni_GetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID))
JNIWrapper("GetObjectField");
HOTSPOT_JNI_GETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID);
oop o = JNIHandles::resolve_non_null(obj);
Klass* k = o->klass();
int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
// Keep JVMTI addition small and only check enabled flag here.
// jni_GetField_probe() assumes that is okay to create handles.
if (JvmtiExport::should_post_field_access()) {
o = JvmtiExport::jni_GetField_probe(thread, obj, o, k, fieldID, false);
}
oop loaded_obj = HeapAccess<ON_UNKNOWN_OOP_REF>::oop_load_at(o, offset);
jobject ret = JNIHandles::make_local(env, loaded_obj);
HOTSPOT_JNI_GETOBJECTFIELD_RETURN(ret);
return ret;
JNI_END
#define DEFINE_GETFIELD(Return,Fieldname,Result \
, EntryProbe, ReturnProbe) \
\
DT_RETURN_MARK_DECL_FOR(Result, Get##Result##Field, Return \
, ReturnProbe); \
\
JNI_QUICK_ENTRY(Return, jni_Get##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID)) \
JNIWrapper("Get" XSTR(Result) "Field"); \
\
EntryProbe; \
Return ret = 0;\
DT_RETURN_MARK_FOR(Result, Get##Result##Field, Return, (const Return&)ret);\
\
oop o = JNIHandles::resolve_non_null(obj); \
Klass* k = o->klass(); \
int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \
/* Keep JVMTI addition small and only check enabled flag here. */ \
/* jni_GetField_probe_nh() assumes that is not okay to create handles */ \
/* and creates a ResetNoHandleMark. */ \
if (JvmtiExport::should_post_field_access()) { \
o = JvmtiExport::jni_GetField_probe_nh(thread, obj, o, k, fieldID, false); \
} \
ret = o->Fieldname##_field(offset); \
return ret; \
JNI_END
DEFINE_GETFIELD(jboolean, bool, Boolean
, HOTSPOT_JNI_GETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
HOTSPOT_JNI_GETBOOLEANFIELD_RETURN(_ret_ref))
DEFINE_GETFIELD(jbyte, byte, Byte
, HOTSPOT_JNI_GETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
HOTSPOT_JNI_GETBYTEFIELD_RETURN(_ret_ref))
DEFINE_GETFIELD(jchar, char, Char
, HOTSPOT_JNI_GETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
HOTSPOT_JNI_GETCHARFIELD_RETURN(_ret_ref))
DEFINE_GETFIELD(jshort, short, Short
, HOTSPOT_JNI_GETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
HOTSPOT_JNI_GETSHORTFIELD_RETURN(_ret_ref))
DEFINE_GETFIELD(jint, int, Int
, HOTSPOT_JNI_GETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
HOTSPOT_JNI_GETINTFIELD_RETURN(_ret_ref))
DEFINE_GETFIELD(jlong, long, Long
, HOTSPOT_JNI_GETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
HOTSPOT_JNI_GETLONGFIELD_RETURN(_ret_ref))
// Float and double probes don't return value because dtrace doesn't currently support it
DEFINE_GETFIELD(jfloat, float, Float
, HOTSPOT_JNI_GETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
HOTSPOT_JNI_GETFLOATFIELD_RETURN())
DEFINE_GETFIELD(jdouble, double, Double
, HOTSPOT_JNI_GETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
HOTSPOT_JNI_GETDOUBLEFIELD_RETURN())
address jni_GetBooleanField_addr() {
return (address)jni_GetBooleanField;
}
address jni_GetByteField_addr() {
return (address)jni_GetByteField;
}
address jni_GetCharField_addr() {
return (address)jni_GetCharField;
}
address jni_GetShortField_addr() {
return (address)jni_GetShortField;
}
address jni_GetIntField_addr() {
return (address)jni_GetIntField;
}
address jni_GetLongField_addr() {
return (address)jni_GetLongField;
}
address jni_GetFloatField_addr() {
return (address)jni_GetFloatField;
}
address jni_GetDoubleField_addr() {
return (address)jni_GetDoubleField;
}
JNI_QUICK_ENTRY(void, jni_SetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID, jobject value))
JNIWrapper("SetObjectField");
HOTSPOT_JNI_SETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID, value);
oop o = JNIHandles::resolve_non_null(obj);
Klass* k = o->klass();
int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
// Keep JVMTI addition small and only check enabled flag here.
// jni_SetField_probe_nh() assumes that is not okay to create handles
// and creates a ResetNoHandleMark.
if (JvmtiExport::should_post_field_modification()) {
jvalue field_value;
field_value.l = value;
o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, 'L', (jvalue *)&field_value);
}
HeapAccess<ON_UNKNOWN_OOP_REF>::oop_store_at(o, offset, JNIHandles::resolve(value));
HOTSPOT_JNI_SETOBJECTFIELD_RETURN();
JNI_END
#define DEFINE_SETFIELD(Argument,Fieldname,Result,SigType,unionType \
, EntryProbe, ReturnProbe) \
\
JNI_QUICK_ENTRY(void, jni_Set##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID, Argument value)) \
JNIWrapper("Set" XSTR(Result) "Field"); \
\
EntryProbe; \
\
oop o = JNIHandles::resolve_non_null(obj); \
Klass* k = o->klass(); \
int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \
/* Keep JVMTI addition small and only check enabled flag here. */ \
/* jni_SetField_probe_nh() assumes that is not okay to create handles */ \
/* and creates a ResetNoHandleMark. */ \
if (JvmtiExport::should_post_field_modification()) { \
jvalue field_value; \
field_value.unionType = value; \
o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, SigType, (jvalue *)&field_value); \
} \
if (SigType == 'Z') { value = ((jboolean)value) & 1; } \
o->Fieldname##_field_put(offset, value); \
ReturnProbe; \
JNI_END
DEFINE_SETFIELD(jboolean, bool, Boolean, 'Z', z
, HOTSPOT_JNI_SETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
HOTSPOT_JNI_SETBOOLEANFIELD_RETURN())
DEFINE_SETFIELD(jbyte, byte, Byte, 'B', b
, HOTSPOT_JNI_SETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
HOTSPOT_JNI_SETBYTEFIELD_RETURN())
DEFINE_SETFIELD(jchar, char, Char, 'C', c
, HOTSPOT_JNI_SETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
HOTSPOT_JNI_SETCHARFIELD_RETURN())
DEFINE_SETFIELD(jshort, short, Short, 'S', s
, HOTSPOT_JNI_SETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
HOTSPOT_JNI_SETSHORTFIELD_RETURN())
DEFINE_SETFIELD(jint, int, Int, 'I', i
, HOTSPOT_JNI_SETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
HOTSPOT_JNI_SETINTFIELD_RETURN())
DEFINE_SETFIELD(jlong, long, Long, 'J', j
, HOTSPOT_JNI_SETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
HOTSPOT_JNI_SETLONGFIELD_RETURN())
// Float and double probes don't return value because dtrace doesn't currently support it
DEFINE_SETFIELD(jfloat, float, Float, 'F', f
, HOTSPOT_JNI_SETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
HOTSPOT_JNI_SETFLOATFIELD_RETURN())
DEFINE_SETFIELD(jdouble, double, Double, 'D', d
, HOTSPOT_JNI_SETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
HOTSPOT_JNI_SETDOUBLEFIELD_RETURN())
DT_RETURN_MARK_DECL(ToReflectedField, jobject
, HOTSPOT_JNI_TOREFLECTEDFIELD_RETURN(_ret_ref));
JNI_ENTRY(jobject, jni_ToReflectedField(JNIEnv *env, jclass cls, jfieldID fieldID, jboolean isStatic))
JNIWrapper("ToReflectedField");
HOTSPOT_JNI_TOREFLECTEDFIELD_ENTRY(env, cls, (uintptr_t) fieldID, isStatic);
jobject ret = NULL;
DT_RETURN_MARK(ToReflectedField, jobject, (const jobject&)ret);
fieldDescriptor fd;
bool found = false;
Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
assert(jfieldIDWorkaround::is_static_jfieldID(fieldID) == (isStatic != 0), "invalid fieldID");
if (isStatic) {
// Static field. The fieldID a JNIid specifying the field holder and the offset within the Klass*.
JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
assert(id->is_static_field_id(), "invalid static field id");
found = id->find_local_field(&fd);
} else {
// Non-static field. The fieldID is really the offset of the field within the instanceOop.
int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
found = InstanceKlass::cast(k)->find_field_from_offset(offset, false, &fd);
}
assert(found, "bad fieldID passed into jni_ToReflectedField");
oop reflected = Reflection::new_field(&fd, CHECK_NULL);
ret = JNIHandles::make_local(env, reflected);
return ret;
JNI_END
//
// Accessing Static Fields
//
DT_RETURN_MARK_DECL(GetStaticFieldID, jfieldID
, HOTSPOT_JNI_GETSTATICFIELDID_RETURN((uintptr_t)_ret_ref));
JNI_ENTRY(jfieldID, jni_GetStaticFieldID(JNIEnv *env, jclass clazz,
const char *name, const char *sig))
JNIWrapper("GetStaticFieldID");
HOTSPOT_JNI_GETSTATICFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig);
jfieldID ret = NULL;
DT_RETURN_MARK(GetStaticFieldID, jfieldID, (const jfieldID&)ret);
// The class should have been loaded (we have an instance of the class
// passed in) so the field and signature should already be in the symbol
// table. If they're not there, the field doesn't exist.
TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name));
TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig));
if (fieldname == NULL || signame == NULL) {
THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
}
Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
// Make sure class is initialized before handing id's out to static fields
k->initialize(CHECK_NULL);
fieldDescriptor fd;
if (!k->is_instance_klass() ||
!InstanceKlass::cast(k)->find_field(fieldname, signame, true, &fd)) {
THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
}
// A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass*
JNIid* id = fd.field_holder()->jni_id_for(fd.offset());
debug_only(id->set_is_static_field_id();)
debug_only(id->verify(fd.field_holder()));
ret = jfieldIDWorkaround::to_static_jfieldID(id);
return ret;
JNI_END
JNI_ENTRY(jobject, jni_GetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID))
JNIWrapper("GetStaticObjectField");
HOTSPOT_JNI_GETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID);
#if INCLUDE_JNI_CHECK
DEBUG_ONLY(Klass* param_k = jniCheck::validate_class(thread, clazz);)
#endif // INCLUDE_JNI_CHECK
JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
assert(id->is_static_field_id(), "invalid static field id");
// Keep JVMTI addition small and only check enabled flag here.
// jni_GetField_probe() assumes that is okay to create handles.
if (JvmtiExport::should_post_field_access()) {
JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true);
}
jobject ret = JNIHandles::make_local(id->holder()->java_mirror()->obj_field(id->offset()));
HOTSPOT_JNI_GETSTATICOBJECTFIELD_RETURN(ret);
return ret;
JNI_END
#define DEFINE_GETSTATICFIELD(Return,Fieldname,Result \
, EntryProbe, ReturnProbe) \
\
DT_RETURN_MARK_DECL_FOR(Result, GetStatic##Result##Field, Return \
, ReturnProbe); \
\
JNI_ENTRY(Return, jni_GetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID)) \
JNIWrapper("GetStatic" XSTR(Result) "Field"); \
EntryProbe; \
Return ret = 0;\
DT_RETURN_MARK_FOR(Result, GetStatic##Result##Field, Return, \
(const Return&)ret);\
JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \
assert(id->is_static_field_id(), "invalid static field id"); \
/* Keep JVMTI addition small and only check enabled flag here. */ \
/* jni_GetField_probe() assumes that is okay to create handles. */ \
if (JvmtiExport::should_post_field_access()) { \
JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true); \
} \
ret = id->holder()->java_mirror()-> Fieldname##_field (id->offset()); \
return ret;\
JNI_END
DEFINE_GETSTATICFIELD(jboolean, bool, Boolean
, HOTSPOT_JNI_GETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBOOLEANFIELD_RETURN(_ret_ref))
DEFINE_GETSTATICFIELD(jbyte, byte, Byte
, HOTSPOT_JNI_GETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBYTEFIELD_RETURN(_ret_ref) )
DEFINE_GETSTATICFIELD(jchar, char, Char
, HOTSPOT_JNI_GETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICCHARFIELD_RETURN(_ret_ref) )
DEFINE_GETSTATICFIELD(jshort, short, Short
, HOTSPOT_JNI_GETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICSHORTFIELD_RETURN(_ret_ref) )
DEFINE_GETSTATICFIELD(jint, int, Int
, HOTSPOT_JNI_GETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICINTFIELD_RETURN(_ret_ref) )
DEFINE_GETSTATICFIELD(jlong, long, Long
, HOTSPOT_JNI_GETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICLONGFIELD_RETURN(_ret_ref) )
// Float and double probes don't return value because dtrace doesn't currently support it
DEFINE_GETSTATICFIELD(jfloat, float, Float
, HOTSPOT_JNI_GETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICFLOATFIELD_RETURN() )
DEFINE_GETSTATICFIELD(jdouble, double, Double
, HOTSPOT_JNI_GETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICDOUBLEFIELD_RETURN() )
JNI_ENTRY(void, jni_SetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID, jobject value))
JNIWrapper("SetStaticObjectField");
HOTSPOT_JNI_SETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value);
JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
assert(id->is_static_field_id(), "invalid static field id");
// Keep JVMTI addition small and only check enabled flag here.
// jni_SetField_probe() assumes that is okay to create handles.
if (JvmtiExport::should_post_field_modification()) {
jvalue field_value;
field_value.l = value;
JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, 'L', (jvalue *)&field_value);
}
id->holder()->java_mirror()->obj_field_put(id->offset(), JNIHandles::resolve(value));
HOTSPOT_JNI_SETSTATICOBJECTFIELD_RETURN();
JNI_END
#define DEFINE_SETSTATICFIELD(Argument,Fieldname,Result,SigType,unionType \
, EntryProbe, ReturnProbe) \
\
JNI_ENTRY(void, jni_SetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID, Argument value)) \
JNIWrapper("SetStatic" XSTR(Result) "Field"); \
EntryProbe; \
\
JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \
assert(id->is_static_field_id(), "invalid static field id"); \
/* Keep JVMTI addition small and only check enabled flag here. */ \
/* jni_SetField_probe() assumes that is okay to create handles. */ \
if (JvmtiExport::should_post_field_modification()) { \
jvalue field_value; \
field_value.unionType = value; \
JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, SigType, (jvalue *)&field_value); \
} \
if (SigType == 'Z') { value = ((jboolean)value) & 1; } \
id->holder()->java_mirror()-> Fieldname##_field_put (id->offset(), value); \
ReturnProbe;\
JNI_END
DEFINE_SETSTATICFIELD(jboolean, bool, Boolean, 'Z', z
, HOTSPOT_JNI_SETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t)fieldID, value),
HOTSPOT_JNI_SETSTATICBOOLEANFIELD_RETURN())
DEFINE_SETSTATICFIELD(jbyte, byte, Byte, 'B', b
, HOTSPOT_JNI_SETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
HOTSPOT_JNI_SETSTATICBYTEFIELD_RETURN())
DEFINE_SETSTATICFIELD(jchar, char, Char, 'C', c
, HOTSPOT_JNI_SETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
HOTSPOT_JNI_SETSTATICCHARFIELD_RETURN())
DEFINE_SETSTATICFIELD(jshort, short, Short, 'S', s
, HOTSPOT_JNI_SETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
HOTSPOT_JNI_SETSTATICSHORTFIELD_RETURN())
DEFINE_SETSTATICFIELD(jint, int, Int, 'I', i
, HOTSPOT_JNI_SETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
HOTSPOT_JNI_SETSTATICINTFIELD_RETURN())
DEFINE_SETSTATICFIELD(jlong, long, Long, 'J', j
, HOTSPOT_JNI_SETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
HOTSPOT_JNI_SETSTATICLONGFIELD_RETURN())
// Float and double probes don't return value because dtrace doesn't currently support it
DEFINE_SETSTATICFIELD(jfloat, float, Float, 'F', f
, HOTSPOT_JNI_SETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),
HOTSPOT_JNI_SETSTATICFLOATFIELD_RETURN())
DEFINE_SETSTATICFIELD(jdouble, double, Double, 'D', d
, HOTSPOT_JNI_SETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),
HOTSPOT_JNI_SETSTATICDOUBLEFIELD_RETURN())
//
// String Operations
//
// Unicode Interface
DT_RETURN_MARK_DECL(NewString, jstring
, HOTSPOT_JNI_NEWSTRING_RETURN(_ret_ref));
JNI_ENTRY(jstring, jni_NewString(JNIEnv *env, const jchar *unicodeChars, jsize len))
JNIWrapper("NewString");
HOTSPOT_JNI_NEWSTRING_ENTRY(env, (uint16_t *) unicodeChars, len);
jstring ret = NULL;
DT_RETURN_MARK(NewString, jstring, (const jstring&)ret);
oop string=java_lang_String::create_oop_from_unicode((jchar*) unicodeChars, len, CHECK_NULL);
ret = (jstring) JNIHandles::make_local(env, string);
return ret;
JNI_END
JNI_QUICK_ENTRY(jsize, jni_GetStringLength(JNIEnv *env, jstring string))
JNIWrapper("GetStringLength");
HOTSPOT_JNI_GETSTRINGLENGTH_ENTRY(env, string);
jsize ret = 0;
oop s = JNIHandles::resolve_non_null(string);
if (java_lang_String::value(s) != NULL) {
ret = java_lang_String::length(s);
}
HOTSPOT_JNI_GETSTRINGLENGTH_RETURN(ret);
return ret;
JNI_END
JNI_QUICK_ENTRY(const jchar*, jni_GetStringChars(
JNIEnv *env, jstring string, jboolean *isCopy))
JNIWrapper("GetStringChars");
HOTSPOT_JNI_GETSTRINGCHARS_ENTRY(env, string, (uintptr_t *) isCopy);
jchar* buf = NULL;
oop s = JNIHandles::resolve_non_null(string);
typeArrayOop s_value = java_lang_String::value(s);
if (s_value != NULL) {
int s_len = java_lang_String::length(s);
bool is_latin1 = java_lang_String::is_latin1(s);
buf = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination
/* JNI Specification states return NULL on OOM */
if (buf != NULL) {
if (s_len > 0) {
if (!is_latin1) {
memcpy(buf, s_value->char_at_addr(0), sizeof(jchar)*s_len);
} else {
for (int i = 0; i < s_len; i++) {
buf[i] = ((jchar) s_value->byte_at(i)) & 0xff;
}
}
}
buf[s_len] = 0;
//%note jni_5
if (isCopy != NULL) {
*isCopy = JNI_TRUE;
}
}
}
HOTSPOT_JNI_GETSTRINGCHARS_RETURN(buf);
return buf;
JNI_END
JNI_QUICK_ENTRY(void, jni_ReleaseStringChars(JNIEnv *env, jstring str, const jchar *chars))
JNIWrapper("ReleaseStringChars");
HOTSPOT_JNI_RELEASESTRINGCHARS_ENTRY(env, str, (uint16_t *) chars);
//%note jni_6
if (chars != NULL) {
// Since String objects are supposed to be immutable, don't copy any
// new data back. A bad user will have to go after the char array.
FreeHeap((void*) chars);
}
HOTSPOT_JNI_RELEASESTRINGCHARS_RETURN();
JNI_END
// UTF Interface
DT_RETURN_MARK_DECL(NewStringUTF, jstring
, HOTSPOT_JNI_NEWSTRINGUTF_RETURN(_ret_ref));
JNI_ENTRY(jstring, jni_NewStringUTF(JNIEnv *env, const char *bytes))
JNIWrapper("NewStringUTF");
HOTSPOT_JNI_NEWSTRINGUTF_ENTRY(env, (char *) bytes);
jstring ret;
DT_RETURN_MARK(NewStringUTF, jstring, (const jstring&)ret);
oop result = java_lang_String::create_oop_from_str((char*) bytes, CHECK_NULL);
ret = (jstring) JNIHandles::make_local(env, result);
return ret;
JNI_END
JNI_ENTRY(jsize, jni_GetStringUTFLength(JNIEnv *env, jstring string))
JNIWrapper("GetStringUTFLength");
HOTSPOT_JNI_GETSTRINGUTFLENGTH_ENTRY(env, string);
jsize ret = 0;
oop java_string = JNIHandles::resolve_non_null(string);
if (java_lang_String::value(java_string) != NULL) {
ret = java_lang_String::utf8_length(java_string);
}
HOTSPOT_JNI_GETSTRINGUTFLENGTH_RETURN(ret);
return ret;
JNI_END
JNI_ENTRY(const char*, jni_GetStringUTFChars(JNIEnv *env, jstring string, jboolean *isCopy))
JNIWrapper("GetStringUTFChars");
HOTSPOT_JNI_GETSTRINGUTFCHARS_ENTRY(env, string, (uintptr_t *) isCopy);
char* result = NULL;
oop java_string = JNIHandles::resolve_non_null(string);
if (java_lang_String::value(java_string) != NULL) {
size_t length = java_lang_String::utf8_length(java_string);
/* JNI Specification states return NULL on OOM */
result = AllocateHeap(length + 1, mtInternal, 0, AllocFailStrategy::RETURN_NULL);
if (result != NULL) {
java_lang_String::as_utf8_string(java_string, result, (int) length + 1);
if (isCopy != NULL) {
*isCopy = JNI_TRUE;
}
}
}
HOTSPOT_JNI_GETSTRINGUTFCHARS_RETURN(result);
return result;
JNI_END
JNI_LEAF(void, jni_ReleaseStringUTFChars(JNIEnv *env, jstring str, const char *chars))
JNIWrapper("ReleaseStringUTFChars");
HOTSPOT_JNI_RELEASESTRINGUTFCHARS_ENTRY(env, str, (char *) chars);
if (chars != NULL) {
FreeHeap((char*) chars);
}
HOTSPOT_JNI_RELEASESTRINGUTFCHARS_RETURN();
JNI_END
JNI_QUICK_ENTRY(jsize, jni_GetArrayLength(JNIEnv *env, jarray array))
JNIWrapper("GetArrayLength");
HOTSPOT_JNI_GETARRAYLENGTH_ENTRY(env, array);
arrayOop a = arrayOop(JNIHandles::resolve_non_null(array));
assert(a->is_array(), "must be array");
jsize ret = a->length();
HOTSPOT_JNI_GETARRAYLENGTH_RETURN(ret);
return ret;
JNI_END
//
// Object Array Operations
//
DT_RETURN_MARK_DECL(NewObjectArray, jobjectArray
, HOTSPOT_JNI_NEWOBJECTARRAY_RETURN(_ret_ref));
JNI_ENTRY(jobjectArray, jni_NewObjectArray(JNIEnv *env, jsize length, jclass elementClass, jobject initialElement))
JNIWrapper("NewObjectArray");
HOTSPOT_JNI_NEWOBJECTARRAY_ENTRY(env, length, elementClass, initialElement);
jobjectArray ret = NULL;
DT_RETURN_MARK(NewObjectArray, jobjectArray, (const jobjectArray&)ret);
Klass* ek = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(elementClass));
Klass* ak = ek->array_klass(CHECK_NULL);
ObjArrayKlass::cast(ak)->initialize(CHECK_NULL);
objArrayOop result = ObjArrayKlass::cast(ak)->allocate(length, CHECK_NULL);
oop initial_value = JNIHandles::resolve(initialElement);
if (initial_value != NULL) { // array already initialized with NULL
for (int index = 0; index < length; index++) {
result->obj_at_put(index, initial_value);
}
}
ret = (jobjectArray) JNIHandles::make_local(env, result);
return ret;
JNI_END
DT_RETURN_MARK_DECL(GetObjectArrayElement, jobject
, HOTSPOT_JNI_GETOBJECTARRAYELEMENT_RETURN(_ret_ref));
JNI_ENTRY(jobject, jni_GetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index))
JNIWrapper("GetObjectArrayElement");
HOTSPOT_JNI_GETOBJECTARRAYELEMENT_ENTRY(env, array, index);
jobject ret = NULL;
DT_RETURN_MARK(GetObjectArrayElement, jobject, (const jobject&)ret);
objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array));
if (a->is_within_bounds(index)) {
ret = JNIHandles::make_local(env, a->obj_at(index));
return ret;
} else {
char buf[jintAsStringSize];
sprintf(buf, "%d", index);
THROW_MSG_0(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), buf);
}
JNI_END
DT_VOID_RETURN_MARK_DECL(SetObjectArrayElement
, HOTSPOT_JNI_SETOBJECTARRAYELEMENT_RETURN());
JNI_ENTRY(void, jni_SetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index, jobject value))
JNIWrapper("SetObjectArrayElement");
HOTSPOT_JNI_SETOBJECTARRAYELEMENT_ENTRY(env, array, index, value);
DT_VOID_RETURN_MARK(SetObjectArrayElement);
objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array));
oop v = JNIHandles::resolve(value);
if (a->is_within_bounds(index)) {
if (v == NULL || v->is_a(ObjArrayKlass::cast(a->klass())->element_klass())) {
a->obj_at_put(index, v);
} else {
THROW(vmSymbols::java_lang_ArrayStoreException());
}
} else {
char buf[jintAsStringSize];
sprintf(buf, "%d", index);
THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), buf);
}
JNI_END
#define DEFINE_NEWSCALARARRAY(Return,Allocator,Result \
,EntryProbe,ReturnProbe) \
\
DT_RETURN_MARK_DECL(New##Result##Array, Return \
, ReturnProbe); \
\
JNI_ENTRY(Return, \
jni_New##Result##Array(JNIEnv *env, jsize len)) \
JNIWrapper("New" XSTR(Result) "Array"); \
EntryProbe; \
Return ret = NULL;\
DT_RETURN_MARK(New##Result##Array, Return, (const Return&)ret);\
\
oop obj= oopFactory::Allocator(len, CHECK_0); \
ret = (Return) JNIHandles::make_local(env, obj); \
return ret;\
JNI_END
DEFINE_NEWSCALARARRAY(jbooleanArray, new_boolArray, Boolean,
HOTSPOT_JNI_NEWBOOLEANARRAY_ENTRY(env, len),
HOTSPOT_JNI_NEWBOOLEANARRAY_RETURN(_ret_ref))
DEFINE_NEWSCALARARRAY(jbyteArray, new_byteArray, Byte,
HOTSPOT_JNI_NEWBYTEARRAY_ENTRY(env, len),
HOTSPOT_JNI_NEWBYTEARRAY_RETURN(_ret_ref))
DEFINE_NEWSCALARARRAY(jshortArray, new_shortArray, Short,
HOTSPOT_JNI_NEWSHORTARRAY_ENTRY(env, len),
HOTSPOT_JNI_NEWSHORTARRAY_RETURN(_ret_ref))
DEFINE_NEWSCALARARRAY(jcharArray, new_charArray, Char,
HOTSPOT_JNI_NEWCHARARRAY_ENTRY(env, len),
HOTSPOT_JNI_NEWCHARARRAY_RETURN(_ret_ref))
DEFINE_NEWSCALARARRAY(jintArray, new_intArray, Int,
HOTSPOT_JNI_NEWINTARRAY_ENTRY(env, len),
HOTSPOT_JNI_NEWINTARRAY_RETURN(_ret_ref))
DEFINE_NEWSCALARARRAY(jlongArray, new_longArray, Long,
HOTSPOT_JNI_NEWLONGARRAY_ENTRY(env, len),
HOTSPOT_JNI_NEWLONGARRAY_RETURN(_ret_ref))
DEFINE_NEWSCALARARRAY(jfloatArray, new_singleArray, Float,
HOTSPOT_JNI_NEWFLOATARRAY_ENTRY(env, len),
HOTSPOT_JNI_NEWFLOATARRAY_RETURN(_ret_ref))
DEFINE_NEWSCALARARRAY(jdoubleArray, new_doubleArray, Double,
HOTSPOT_JNI_NEWDOUBLEARRAY_ENTRY(env, len),
HOTSPOT_JNI_NEWDOUBLEARRAY_RETURN(_ret_ref))
// Return an address which will fault if the caller writes to it.
static char* get_bad_address() {
static char* bad_address = NULL;
if (bad_address == NULL) {
size_t size = os::vm_allocation_granularity();
bad_address = os::reserve_memory(size);
if (bad_address != NULL) {
os::protect_memory(bad_address, size, os::MEM_PROT_READ,
/*is_committed*/false);
MemTracker::record_virtual_memory_type((void*)bad_address, mtInternal);
}
}
return bad_address;
}
#define DEFINE_GETSCALARARRAYELEMENTS(ElementTag,ElementType,Result, Tag \
, EntryProbe, ReturnProbe) \
\
JNI_QUICK_ENTRY(ElementType*, \
jni_Get##Result##ArrayElements(JNIEnv *env, ElementType##Array array, jboolean *isCopy)) \
JNIWrapper("Get" XSTR(Result) "ArrayElements"); \
EntryProbe; \
/* allocate an chunk of memory in c land */ \
typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \
ElementType* result; \
int len = a->length(); \
if (len == 0) { \
/* Empty array: legal but useless, can't return NULL. \
* Return a pointer to something useless. \
* Avoid asserts in typeArrayOop. */ \
result = (ElementType*)get_bad_address(); \
} else { \
/* JNI Specification states return NULL on OOM */ \
result = NEW_C_HEAP_ARRAY_RETURN_NULL(ElementType, len, mtInternal); \
if (result != NULL) { \
/* copy the array to the c chunk */ \
memcpy(result, a->Tag##_at_addr(0), sizeof(ElementType)*len); \
if (isCopy) { \
*isCopy = JNI_TRUE; \
} \
} \
} \
ReturnProbe; \
return result; \
JNI_END
DEFINE_GETSCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool
, HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_RETURN((uintptr_t*)result))
DEFINE_GETSCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte
, HOTSPOT_JNI_GETBYTEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
HOTSPOT_JNI_GETBYTEARRAYELEMENTS_RETURN((char*)result))
DEFINE_GETSCALARARRAYELEMENTS(T_SHORT, jshort, Short, short
, HOTSPOT_JNI_GETSHORTARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy),
HOTSPOT_JNI_GETSHORTARRAYELEMENTS_RETURN((uint16_t*)result))
DEFINE_GETSCALARARRAYELEMENTS(T_CHAR, jchar, Char, char
, HOTSPOT_JNI_GETCHARARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy),
HOTSPOT_JNI_GETCHARARRAYELEMENTS_RETURN(result))
DEFINE_GETSCALARARRAYELEMENTS(T_INT, jint, Int, int
, HOTSPOT_JNI_GETINTARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
HOTSPOT_JNI_GETINTARRAYELEMENTS_RETURN((uint32_t*)result))
DEFINE_GETSCALARARRAYELEMENTS(T_LONG, jlong, Long, long
, HOTSPOT_JNI_GETLONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
HOTSPOT_JNI_GETLONGARRAYELEMENTS_RETURN(((uintptr_t*)result)))
// Float and double probes don't return value because dtrace doesn't currently support it
DEFINE_GETSCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float
, HOTSPOT_JNI_GETFLOATARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
HOTSPOT_JNI_GETFLOATARRAYELEMENTS_RETURN(result))
DEFINE_GETSCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double
, HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_RETURN(result))
#define DEFINE_RELEASESCALARARRAYELEMENTS(ElementTag,ElementType,Result,Tag \
, EntryProbe, ReturnProbe);\
\
JNI_QUICK_ENTRY(void, \
jni_Release##Result##ArrayElements(JNIEnv *env, ElementType##Array array, \
ElementType *buf, jint mode)) \
JNIWrapper("Release" XSTR(Result) "ArrayElements"); \
EntryProbe; \
typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \
int len = a->length(); \
if (len != 0) { /* Empty array: nothing to free or copy. */ \
if ((mode == 0) || (mode == JNI_COMMIT)) { \
memcpy(a->Tag##_at_addr(0), buf, sizeof(ElementType)*len); \
} \
if ((mode == 0) || (mode == JNI_ABORT)) { \
FreeHeap(buf); \
} \
} \
ReturnProbe; \
JNI_END
DEFINE_RELEASESCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool
, HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode),
HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_RETURN())
DEFINE_RELEASESCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte
, HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_ENTRY(env, array, (char *) buf, mode),
HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_RETURN())
DEFINE_RELEASESCALARARRAYELEMENTS(T_SHORT, jshort, Short, short
, HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode),
HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_RETURN())
DEFINE_RELEASESCALARARRAYELEMENTS(T_CHAR, jchar, Char, char
, HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode),
HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_RETURN())
DEFINE_RELEASESCALARARRAYELEMENTS(T_INT, jint, Int, int
, HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_ENTRY(env, array, (uint32_t *) buf, mode),
HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_RETURN())
DEFINE_RELEASESCALARARRAYELEMENTS(T_LONG, jlong, Long, long
, HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode),
HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_RETURN())
DEFINE_RELEASESCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float
, HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_ENTRY(env, array, (float *) buf, mode),
HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_RETURN())
DEFINE_RELEASESCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double
, HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_ENTRY(env, array, (double *) buf, mode),
HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_RETURN())
#define DEFINE_GETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \
, EntryProbe, ReturnProbe); \
DT_VOID_RETURN_MARK_DECL(Get##Result##ArrayRegion \
, ReturnProbe); \
\
JNI_ENTRY(void, \
jni_Get##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \
jsize len, ElementType *buf)) \
JNIWrapper("Get" XSTR(Result) "ArrayRegion"); \
EntryProbe; \
DT_VOID_RETURN_MARK(Get##Result##ArrayRegion); \
typeArrayOop src = typeArrayOop(JNIHandles::resolve_non_null(array)); \
if (start < 0 || len < 0 || (start > src->length() - len)) { \
THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); \
} else { \
if (len > 0) { \
int sc = TypeArrayKlass::cast(src->klass())->log2_element_size(); \
memcpy((u_char*) buf, \
(u_char*) src->Tag##_at_addr(start), \
len << sc); \
} \
} \
JNI_END
DEFINE_GETSCALARARRAYREGION(T_BOOLEAN, jboolean,Boolean, bool
, HOTSPOT_JNI_GETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
HOTSPOT_JNI_GETBOOLEANARRAYREGION_RETURN());
DEFINE_GETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte
, HOTSPOT_JNI_GETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf),
HOTSPOT_JNI_GETBYTEARRAYREGION_RETURN());
DEFINE_GETSCALARARRAYREGION(T_SHORT, jshort, Short, short
, HOTSPOT_JNI_GETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
HOTSPOT_JNI_GETSHORTARRAYREGION_RETURN());
DEFINE_GETSCALARARRAYREGION(T_CHAR, jchar, Char, char
, HOTSPOT_JNI_GETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t*) buf),
HOTSPOT_JNI_GETCHARARRAYREGION_RETURN());
DEFINE_GETSCALARARRAYREGION(T_INT, jint, Int, int
, HOTSPOT_JNI_GETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t*) buf),
HOTSPOT_JNI_GETINTARRAYREGION_RETURN());
DEFINE_GETSCALARARRAYREGION(T_LONG, jlong, Long, long
, HOTSPOT_JNI_GETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
HOTSPOT_JNI_GETLONGARRAYREGION_RETURN());
DEFINE_GETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float
, HOTSPOT_JNI_GETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf),
HOTSPOT_JNI_GETFLOATARRAYREGION_RETURN());
DEFINE_GETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double
, HOTSPOT_JNI_GETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf),
HOTSPOT_JNI_GETDOUBLEARRAYREGION_RETURN());
#define DEFINE_SETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \
, EntryProbe, ReturnProbe); \
DT_VOID_RETURN_MARK_DECL(Set##Result##ArrayRegion \
,ReturnProbe); \
\
JNI_ENTRY(void, \
jni_Set##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \
jsize len, const ElementType *buf)) \
JNIWrapper("Set" XSTR(Result) "ArrayRegion"); \
EntryProbe; \
DT_VOID_RETURN_MARK(Set##Result##ArrayRegion); \
typeArrayOop dst = typeArrayOop(JNIHandles::resolve_non_null(array)); \
if (start < 0 || len < 0 || (start > dst->length() - len)) { \
THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); \
} else { \
if (len > 0) { \
int sc = TypeArrayKlass::cast(dst->klass())->log2_element_size(); \
memcpy((u_char*) dst->Tag##_at_addr(start), \
(u_char*) buf, \
len << sc); \
} \
} \
JNI_END
DEFINE_SETSCALARARRAYREGION(T_BOOLEAN, jboolean, Boolean, bool
, HOTSPOT_JNI_SETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *)buf),
HOTSPOT_JNI_SETBOOLEANARRAYREGION_RETURN())
DEFINE_SETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte
, HOTSPOT_JNI_SETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf),
HOTSPOT_JNI_SETBYTEARRAYREGION_RETURN())
DEFINE_SETSCALARARRAYREGION(T_SHORT, jshort, Short, short
, HOTSPOT_JNI_SETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
HOTSPOT_JNI_SETSHORTARRAYREGION_RETURN())
DEFINE_SETSCALARARRAYREGION(T_CHAR, jchar, Char, char
, HOTSPOT_JNI_SETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
HOTSPOT_JNI_SETCHARARRAYREGION_RETURN())
DEFINE_SETSCALARARRAYREGION(T_INT, jint, Int, int
, HOTSPOT_JNI_SETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t *) buf),
HOTSPOT_JNI_SETINTARRAYREGION_RETURN())
DEFINE_SETSCALARARRAYREGION(T_LONG, jlong, Long, long
, HOTSPOT_JNI_SETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
HOTSPOT_JNI_SETLONGARRAYREGION_RETURN())
DEFINE_SETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float
, HOTSPOT_JNI_SETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf),
HOTSPOT_JNI_SETFLOATARRAYREGION_RETURN())
DEFINE_SETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double
, HOTSPOT_JNI_SETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf),
HOTSPOT_JNI_SETDOUBLEARRAYREGION_RETURN())
//
// Interception of natives
//
// The RegisterNatives call being attempted tried to register with a method that
// is not native. Ask JVM TI what prefixes have been specified. Then check
// to see if the native method is now wrapped with the prefixes. See the
// SetNativeMethodPrefix(es) functions in the JVM TI Spec for details.
static Method* find_prefixed_native(Klass* k, Symbol* name, Symbol* signature, TRAPS) {
#if INCLUDE_JVMTI
ResourceMark rm(THREAD);
Method* method;
int name_len = name->utf8_length();
char* name_str = name->as_utf8();
int prefix_count;
char** prefixes = JvmtiExport::get_all_native_method_prefixes(&prefix_count);
for (int i = 0; i < prefix_count; i++) {
char* prefix = prefixes[i];
int prefix_len = (int)strlen(prefix);
// try adding this prefix to the method name and see if it matches another method name
int trial_len = name_len + prefix_len;
char* trial_name_str = NEW_RESOURCE_ARRAY(char, trial_len + 1);
strcpy(trial_name_str, prefix);
strcat(trial_name_str, name_str);
TempNewSymbol trial_name = SymbolTable::probe(trial_name_str, trial_len);
if (trial_name == NULL) {
continue; // no such symbol, so this prefix wasn't used, try the next prefix
}
method = k->lookup_method(trial_name, signature);
if (method == NULL) {
continue; // signature doesn't match, try the next prefix
}
if (method->is_native()) {
method->set_is_prefixed_native();
return method; // wahoo, we found a prefixed version of the method, return it
}
// found as non-native, so prefix is good, add it, probably just need more prefixes
name_len = trial_len;
name_str = trial_name_str;
}
#endif // INCLUDE_JVMTI
return NULL; // not found
}
static bool register_native(Klass* k, Symbol* name, Symbol* signature, address entry, TRAPS) {
Method* method = k->lookup_method(name, signature);
if (method == NULL) {
ResourceMark rm;
stringStream st;
st.print("Method %s name or signature does not match",
Method::name_and_sig_as_C_string(k, name, signature));
THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), false);
}
if (!method->is_native()) {
// trying to register to a non-native method, see if a JVM TI agent has added prefix(es)
method = find_prefixed_native(k, name, signature, THREAD);
if (method == NULL) {
ResourceMark rm;
stringStream st;
st.print("Method %s is not declared as native",
Method::name_and_sig_as_C_string(k, name, signature));
THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), false);
}
}
if (entry != NULL) {
method->set_native_function(entry,
Method::native_bind_event_is_interesting);
} else {
method->clear_native_function();
}
if (PrintJNIResolving) {
ResourceMark rm(THREAD);
tty->print_cr("[Registering JNI native method %s.%s]",
method->method_holder()->external_name(),
method->name()->as_C_string());
}
return true;
}
DT_RETURN_MARK_DECL(RegisterNatives, jint
, HOTSPOT_JNI_REGISTERNATIVES_RETURN(_ret_ref));
JNI_ENTRY(jint, jni_RegisterNatives(JNIEnv *env, jclass clazz,
const JNINativeMethod *methods,
jint nMethods))
JNIWrapper("RegisterNatives");
HOTSPOT_JNI_REGISTERNATIVES_ENTRY(env, clazz, (void *) methods, nMethods);
jint ret = 0;
DT_RETURN_MARK(RegisterNatives, jint, (const jint&)ret);
Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
for (int index = 0; index < nMethods; index++) {
const char* meth_name = methods[index].name;
const char* meth_sig = methods[index].signature;
int meth_name_len = (int)strlen(meth_name);
// The class should have been loaded (we have an instance of the class
// passed in) so the method and signature should already be in the symbol
// table. If they're not there, the method doesn't exist.
TempNewSymbol name = SymbolTable::probe(meth_name, meth_name_len);
TempNewSymbol signature = SymbolTable::probe(meth_sig, (int)strlen(meth_sig));
if (name == NULL || signature == NULL) {
ResourceMark rm;
stringStream st;
st.print("Method %s.%s%s not found", k->external_name(), meth_name, meth_sig);
// Must return negative value on failure
THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), -1);
}
bool res = register_native(k, name, signature,
(address) methods[index].fnPtr, THREAD);
if (!res) {
ret = -1;
break;
}
}
return ret;
JNI_END
JNI_ENTRY(jint, jni_UnregisterNatives(JNIEnv *env, jclass clazz))
JNIWrapper("UnregisterNatives");
HOTSPOT_JNI_UNREGISTERNATIVES_ENTRY(env, clazz);
Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
//%note jni_2
if (k->is_instance_klass()) {
for (int index = 0; index < InstanceKlass::cast(k)->methods()->length(); index++) {
Method* m = InstanceKlass::cast(k)->methods()->at(index);
if (m->is_native()) {
m->clear_native_function();
m->set_signature_handler(NULL);
}
}
}
HOTSPOT_JNI_UNREGISTERNATIVES_RETURN(0);
return 0;
JNI_END
//
// Monitor functions
//
DT_RETURN_MARK_DECL(MonitorEnter, jint
, HOTSPOT_JNI_MONITORENTER_RETURN(_ret_ref));
JNI_ENTRY(jint, jni_MonitorEnter(JNIEnv *env, jobject jobj))
HOTSPOT_JNI_MONITORENTER_ENTRY(env, jobj);
jint ret = JNI_ERR;
DT_RETURN_MARK(MonitorEnter, jint, (const jint&)ret);
// If the object is null, we can't do anything with it
if (jobj == NULL) {
THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR);
}
Handle obj(thread, JNIHandles::resolve_non_null(jobj));
ObjectSynchronizer::jni_enter(obj, CHECK_(JNI_ERR));
ret = JNI_OK;
return ret;
JNI_END
DT_RETURN_MARK_DECL(MonitorExit, jint
, HOTSPOT_JNI_MONITOREXIT_RETURN(_ret_ref));
JNI_ENTRY(jint, jni_MonitorExit(JNIEnv *env, jobject jobj))
HOTSPOT_JNI_MONITOREXIT_ENTRY(env, jobj);
jint ret = JNI_ERR;
DT_RETURN_MARK(MonitorExit, jint, (const jint&)ret);
// Don't do anything with a null object
if (jobj == NULL) {
THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR);
}
Handle obj(THREAD, JNIHandles::resolve_non_null(jobj));
ObjectSynchronizer::jni_exit(obj(), CHECK_(JNI_ERR));
ret = JNI_OK;
return ret;
JNI_END
//
// Extensions
//
DT_VOID_RETURN_MARK_DECL(GetStringRegion
, HOTSPOT_JNI_GETSTRINGREGION_RETURN());
JNI_ENTRY(void, jni_GetStringRegion(JNIEnv *env, jstring string, jsize start, jsize len, jchar *buf))
JNIWrapper("GetStringRegion");
HOTSPOT_JNI_GETSTRINGREGION_ENTRY(env, string, start, len, buf);
DT_VOID_RETURN_MARK(GetStringRegion);
oop s = JNIHandles::resolve_non_null(string);
int s_len = java_lang_String::length(s);
if (start < 0 || len < 0 || start > s_len - len) {
THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException());
} else {
if (len > 0) {
typeArrayOop s_value = java_lang_String::value(s);
bool is_latin1 = java_lang_String::is_latin1(s);
if (!is_latin1) {
memcpy(buf, s_value->char_at_addr(start), sizeof(jchar)*len);
} else {
for (int i = 0; i < len; i++) {
buf[i] = ((jchar) s_value->byte_at(i + start)) & 0xff;
}
}
}
}
JNI_END
DT_VOID_RETURN_MARK_DECL(GetStringUTFRegion
, HOTSPOT_JNI_GETSTRINGUTFREGION_RETURN());
JNI_ENTRY(void, jni_GetStringUTFRegion(JNIEnv *env, jstring string, jsize start, jsize len, char *buf))
JNIWrapper("GetStringUTFRegion");
HOTSPOT_JNI_GETSTRINGUTFREGION_ENTRY(env, string, start, len, buf);
DT_VOID_RETURN_MARK(GetStringUTFRegion);
oop s = JNIHandles::resolve_non_null(string);
int s_len = java_lang_String::length(s);
if (start < 0 || len < 0 || start > s_len - len) {
THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException());
} else {
//%note jni_7
if (len > 0) {
// Assume the buffer is large enough as the JNI spec. does not require user error checking
java_lang_String::as_utf8_string(s, start, len, buf, INT_MAX);
// as_utf8_string null-terminates the result string
} else {
// JDK null-terminates the buffer even in len is zero
if (buf != NULL) {
buf[0] = 0;
}
}
}
JNI_END
JNI_ENTRY(void*, jni_GetPrimitiveArrayCritical(JNIEnv *env, jarray array, jboolean *isCopy))
JNIWrapper("GetPrimitiveArrayCritical");
HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_ENTRY(env, array, (uintptr_t *) isCopy);
if (isCopy != NULL) {
*isCopy = JNI_FALSE;
}
oop a = JNIHandles::resolve_non_null(array);
a = Universe::heap()->pin_object(thread, a);
assert(a->is_array(), "just checking");
BasicType type;
if (a->is_objArray()) {
type = T_OBJECT;
} else {
type = TypeArrayKlass::cast(a->klass())->element_type();
}
void* ret = arrayOop(a)->base(type);
HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_RETURN(ret);
return ret;
JNI_END
JNI_ENTRY(void, jni_ReleasePrimitiveArrayCritical(JNIEnv *env, jarray array, void *carray, jint mode))
JNIWrapper("ReleasePrimitiveArrayCritical");
HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_ENTRY(env, array, carray, mode);
oop a = JNIHandles::resolve_non_null(array);
Universe::heap()->unpin_object(thread, a);
HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_RETURN();
JNI_END
JNI_ENTRY(const jchar*, jni_GetStringCritical(JNIEnv *env, jstring string, jboolean *isCopy))
JNIWrapper("GetStringCritical");
HOTSPOT_JNI_GETSTRINGCRITICAL_ENTRY(env, string, (uintptr_t *) isCopy);
oop s = JNIHandles::resolve_non_null(string);
s = Universe::heap()->pin_object(thread, s);
typeArrayOop s_value = java_lang_String::value(s);
bool is_latin1 = java_lang_String::is_latin1(s);
if (isCopy != NULL) {
*isCopy = is_latin1 ? JNI_TRUE : JNI_FALSE;
}
jchar* ret;
if (!is_latin1) {
ret = (jchar*) s_value->base(T_CHAR);
} else {
// Inflate latin1 encoded string to UTF16
int s_len = java_lang_String::length(s);
ret = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal); // add one for zero termination
/* JNI Specification states return NULL on OOM */
if (ret != NULL) {
for (int i = 0; i < s_len; i++) {
ret[i] = ((jchar) s_value->byte_at(i)) & 0xff;
}
ret[s_len] = 0;
}
}
HOTSPOT_JNI_GETSTRINGCRITICAL_RETURN((uint16_t *) ret);
return ret;
JNI_END
JNI_ENTRY(void, jni_ReleaseStringCritical(JNIEnv *env, jstring str, const jchar *chars))
JNIWrapper("ReleaseStringCritical");
HOTSPOT_JNI_RELEASESTRINGCRITICAL_ENTRY(env, str, (uint16_t *) chars);
// The str and chars arguments are ignored for UTF16 strings
oop s = JNIHandles::resolve_non_null(str);
bool is_latin1 = java_lang_String::is_latin1(s);
if (is_latin1) {
// For latin1 string, free jchar array allocated by earlier call to GetStringCritical.
// This assumes that ReleaseStringCritical bookends GetStringCritical.
FREE_C_HEAP_ARRAY(jchar, chars);
}
Universe::heap()->unpin_object(thread, s);
HOTSPOT_JNI_RELEASESTRINGCRITICAL_RETURN();
JNI_END
JNI_ENTRY(jweak, jni_NewWeakGlobalRef(JNIEnv *env, jobject ref))
JNIWrapper("jni_NewWeakGlobalRef");
HOTSPOT_JNI_NEWWEAKGLOBALREF_ENTRY(env, ref);
Handle ref_handle(thread, JNIHandles::resolve(ref));
jweak ret = JNIHandles::make_weak_global(ref_handle);
HOTSPOT_JNI_NEWWEAKGLOBALREF_RETURN(ret);
return ret;
JNI_END
// Must be JNI_ENTRY (with HandleMark)
JNI_ENTRY(void, jni_DeleteWeakGlobalRef(JNIEnv *env, jweak ref))
JNIWrapper("jni_DeleteWeakGlobalRef");
HOTSPOT_JNI_DELETEWEAKGLOBALREF_ENTRY(env, ref);
JNIHandles::destroy_weak_global(ref);
HOTSPOT_JNI_DELETEWEAKGLOBALREF_RETURN();
JNI_END
JNI_QUICK_ENTRY(jboolean, jni_ExceptionCheck(JNIEnv *env))
JNIWrapper("jni_ExceptionCheck");
HOTSPOT_JNI_EXCEPTIONCHECK_ENTRY(env);
jni_check_async_exceptions(thread);
jboolean ret = (thread->has_pending_exception()) ? JNI_TRUE : JNI_FALSE;
HOTSPOT_JNI_EXCEPTIONCHECK_RETURN(ret);
return ret;
JNI_END
// Initialization state for three routines below relating to
// java.nio.DirectBuffers
static int directBufferSupportInitializeStarted = 0;
static volatile int directBufferSupportInitializeEnded = 0;
static volatile int directBufferSupportInitializeFailed = 0;
static jclass bufferClass = NULL;
static jclass directBufferClass = NULL;
static jclass directByteBufferClass = NULL;
static jmethodID directByteBufferConstructor = NULL;
static jfieldID directBufferAddressField = NULL;
static jfieldID bufferCapacityField = NULL;
static jclass lookupOne(JNIEnv* env, const char* name, TRAPS) {
Handle loader; // null (bootstrap) loader
Handle protection_domain; // null protection domain
TempNewSymbol sym = SymbolTable::new_symbol(name, CHECK_NULL);
jclass result = find_class_from_class_loader(env, sym, true, loader, protection_domain, true, CHECK_NULL);
if (log_is_enabled(Debug, class, resolve) && result != NULL) {
trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
}
return result;
}
// These lookups are done with the NULL (bootstrap) ClassLoader to
// circumvent any security checks that would be done by jni_FindClass.
JNI_ENTRY(bool, lookupDirectBufferClasses(JNIEnv* env))
{
if ((bufferClass = lookupOne(env, "java/nio/Buffer", thread)) == NULL) { return false; }
if ((directBufferClass = lookupOne(env, "sun/nio/ch/DirectBuffer", thread)) == NULL) { return false; }
if ((directByteBufferClass = lookupOne(env, "java/nio/DirectByteBuffer", thread)) == NULL) { return false; }
return true;
}
JNI_END
static bool initializeDirectBufferSupport(JNIEnv* env, JavaThread* thread) {
if (directBufferSupportInitializeFailed) {
return false;
}
if (Atomic::cmpxchg(1, &directBufferSupportInitializeStarted, 0) == 0) {
if (!lookupDirectBufferClasses(env)) {
directBufferSupportInitializeFailed = 1;
return false;
}
// Make global references for these
bufferClass = (jclass) env->NewGlobalRef(bufferClass);
directBufferClass = (jclass) env->NewGlobalRef(directBufferClass);
directByteBufferClass = (jclass) env->NewGlobalRef(directByteBufferClass);
// Get needed field and method IDs
directByteBufferConstructor = env->GetMethodID(directByteBufferClass, "<init>", "(JI)V");
if (env->ExceptionCheck()) {
env->ExceptionClear();
directBufferSupportInitializeFailed = 1;
return false;
}
directBufferAddressField = env->GetFieldID(bufferClass, "address", "J");
if (env->ExceptionCheck()) {
env->ExceptionClear();
directBufferSupportInitializeFailed = 1;
return false;
}
bufferCapacityField = env->GetFieldID(bufferClass, "capacity", "I");
if (env->ExceptionCheck()) {
env->ExceptionClear();
directBufferSupportInitializeFailed = 1;
return false;
}
if ((directByteBufferConstructor == NULL) ||
(directBufferAddressField == NULL) ||
(bufferCapacityField == NULL)) {
directBufferSupportInitializeFailed = 1;
return false;
}
directBufferSupportInitializeEnded = 1;
} else {
while (!directBufferSupportInitializeEnded && !directBufferSupportInitializeFailed) {
os::naked_yield();
}
}
return !directBufferSupportInitializeFailed;
}
extern "C" jobject JNICALL jni_NewDirectByteBuffer(JNIEnv *env, void* address, jlong capacity)
{
// thread_from_jni_environment() will block if VM is gone.
JavaThread* thread = JavaThread::thread_from_jni_environment(env);
JNIWrapper("jni_NewDirectByteBuffer");
HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_ENTRY(env, address, capacity);
if (!directBufferSupportInitializeEnded) {
if (!initializeDirectBufferSupport(env, thread)) {
HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(NULL);
return NULL;
}
}
// Being paranoid about accidental sign extension on address
jlong addr = (jlong) ((uintptr_t) address);
// NOTE that package-private DirectByteBuffer constructor currently
// takes int capacity
jint cap = (jint) capacity;
jobject ret = env->NewObject(directByteBufferClass, directByteBufferConstructor, addr, cap);
HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(ret);
return ret;
}
DT_RETURN_MARK_DECL(GetDirectBufferAddress, void*
, HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_RETURN((void*) _ret_ref));
extern "C" void* JNICALL jni_GetDirectBufferAddress(JNIEnv *env, jobject buf)
{
// thread_from_jni_environment() will block if VM is gone.
JavaThread* thread = JavaThread::thread_from_jni_environment(env);
JNIWrapper("jni_GetDirectBufferAddress");
HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_ENTRY(env, buf);
void* ret = NULL;
DT_RETURN_MARK(GetDirectBufferAddress, void*, (const void*&)ret);
if (!directBufferSupportInitializeEnded) {
if (!initializeDirectBufferSupport(env, thread)) {
return 0;
}
}
if ((buf != NULL) && (!env->IsInstanceOf(buf, directBufferClass))) {
return 0;
}
ret = (void*)(intptr_t)env->GetLongField(buf, directBufferAddressField);
return ret;
}
DT_RETURN_MARK_DECL(GetDirectBufferCapacity, jlong
, HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_RETURN(_ret_ref));
extern "C" jlong JNICALL jni_GetDirectBufferCapacity(JNIEnv *env, jobject buf)
{
// thread_from_jni_environment() will block if VM is gone.
JavaThread* thread = JavaThread::thread_from_jni_environment(env);
JNIWrapper("jni_GetDirectBufferCapacity");
HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_ENTRY(env, buf);
jlong ret = -1;
DT_RETURN_MARK(GetDirectBufferCapacity, jlong, (const jlong&)ret);
if (!directBufferSupportInitializeEnded) {
if (!initializeDirectBufferSupport(env, thread)) {
ret = 0;
return ret;
}
}
if (buf == NULL) {
return -1;
}
if (!env->IsInstanceOf(buf, directBufferClass)) {
return -1;
}
// NOTE that capacity is currently an int in the implementation
ret = env->GetIntField(buf, bufferCapacityField);
return ret;
}
JNI_LEAF(jint, jni_GetVersion(JNIEnv *env))
JNIWrapper("GetVersion");
HOTSPOT_JNI_GETVERSION_ENTRY(env);
HOTSPOT_JNI_GETVERSION_RETURN(CurrentVersion);
return CurrentVersion;
JNI_END
extern struct JavaVM_ main_vm;
JNI_LEAF(jint, jni_GetJavaVM(JNIEnv *env, JavaVM **vm))
JNIWrapper("jni_GetJavaVM");
HOTSPOT_JNI_GETJAVAVM_ENTRY(env, (void **) vm);
*vm = (JavaVM *)(&main_vm);
HOTSPOT_JNI_GETJAVAVM_RETURN(JNI_OK);
return JNI_OK;
JNI_END
JNI_ENTRY(jobject, jni_GetModule(JNIEnv* env, jclass clazz))
JNIWrapper("GetModule");
return Modules::get_module(clazz, THREAD);
JNI_END
// Structure containing all jni functions
struct JNINativeInterface_ jni_NativeInterface = {
NULL,
NULL,
NULL,
NULL,
jni_GetVersion,
jni_DefineClass,
jni_FindClass,
jni_FromReflectedMethod,
jni_FromReflectedField,
jni_ToReflectedMethod,
jni_GetSuperclass,
jni_IsAssignableFrom,
jni_ToReflectedField,
jni_Throw,
jni_ThrowNew,
jni_ExceptionOccurred,
jni_ExceptionDescribe,
jni_ExceptionClear,
jni_FatalError,
jni_PushLocalFrame,
jni_PopLocalFrame,
jni_NewGlobalRef,
jni_DeleteGlobalRef,
jni_DeleteLocalRef,
jni_IsSameObject,
jni_NewLocalRef,
jni_EnsureLocalCapacity,
jni_AllocObject,
jni_NewObject,
jni_NewObjectV,
jni_NewObjectA,
jni_GetObjectClass,
jni_IsInstanceOf,
jni_GetMethodID,
jni_CallObjectMethod,
jni_CallObjectMethodV,
jni_CallObjectMethodA,
jni_CallBooleanMethod,
jni_CallBooleanMethodV,
jni_CallBooleanMethodA,
jni_CallByteMethod,
jni_CallByteMethodV,
jni_CallByteMethodA,
jni_CallCharMethod,
jni_CallCharMethodV,
jni_CallCharMethodA,
jni_CallShortMethod,
jni_CallShortMethodV,
jni_CallShortMethodA,
jni_CallIntMethod,
jni_CallIntMethodV,
jni_CallIntMethodA,
jni_CallLongMethod,
jni_CallLongMethodV,
jni_CallLongMethodA,
jni_CallFloatMethod,
jni_CallFloatMethodV,
jni_CallFloatMethodA,
jni_CallDoubleMethod,
jni_CallDoubleMethodV,
jni_CallDoubleMethodA,
jni_CallVoidMethod,
jni_CallVoidMethodV,
jni_CallVoidMethodA,
jni_CallNonvirtualObjectMethod,
jni_CallNonvirtualObjectMethodV,
jni_CallNonvirtualObjectMethodA,
jni_CallNonvirtualBooleanMethod,
jni_CallNonvirtualBooleanMethodV,
jni_CallNonvirtualBooleanMethodA,
jni_CallNonvirtualByteMethod,
jni_CallNonvirtualByteMethodV,
jni_CallNonvirtualByteMethodA,
jni_CallNonvirtualCharMethod,
jni_CallNonvirtualCharMethodV,
jni_CallNonvirtualCharMethodA,
jni_CallNonvirtualShortMethod,
jni_CallNonvirtualShortMethodV,
jni_CallNonvirtualShortMethodA,
jni_CallNonvirtualIntMethod,
jni_CallNonvirtualIntMethodV,
jni_CallNonvirtualIntMethodA,
jni_CallNonvirtualLongMethod,
jni_CallNonvirtualLongMethodV,
jni_CallNonvirtualLongMethodA,
jni_CallNonvirtualFloatMethod,
jni_CallNonvirtualFloatMethodV,
jni_CallNonvirtualFloatMethodA,
jni_CallNonvirtualDoubleMethod,
jni_CallNonvirtualDoubleMethodV,
jni_CallNonvirtualDoubleMethodA,
jni_CallNonvirtualVoidMethod,
jni_CallNonvirtualVoidMethodV,
jni_CallNonvirtualVoidMethodA,
jni_GetFieldID,
jni_GetObjectField,
jni_GetBooleanField,
jni_GetByteField,
jni_GetCharField,
jni_GetShortField,
jni_GetIntField,
jni_GetLongField,
jni_GetFloatField,
jni_GetDoubleField,
jni_SetObjectField,
jni_SetBooleanField,
jni_SetByteField,
jni_SetCharField,
jni_SetShortField,
jni_SetIntField,
jni_SetLongField,
jni_SetFloatField,
jni_SetDoubleField,
jni_GetStaticMethodID,
jni_CallStaticObjectMethod,
jni_CallStaticObjectMethodV,
jni_CallStaticObjectMethodA,
jni_CallStaticBooleanMethod,
jni_CallStaticBooleanMethodV,
jni_CallStaticBooleanMethodA,
jni_CallStaticByteMethod,
jni_CallStaticByteMethodV,
jni_CallStaticByteMethodA,
jni_CallStaticCharMethod,
jni_CallStaticCharMethodV,
jni_CallStaticCharMethodA,
jni_CallStaticShortMethod,
jni_CallStaticShortMethodV,
jni_CallStaticShortMethodA,
jni_CallStaticIntMethod,
jni_CallStaticIntMethodV,
jni_CallStaticIntMethodA,
jni_CallStaticLongMethod,
jni_CallStaticLongMethodV,
jni_CallStaticLongMethodA,
jni_CallStaticFloatMethod,
jni_CallStaticFloatMethodV,
jni_CallStaticFloatMethodA,
jni_CallStaticDoubleMethod,
jni_CallStaticDoubleMethodV,
jni_CallStaticDoubleMethodA,
jni_CallStaticVoidMethod,
jni_CallStaticVoidMethodV,
jni_CallStaticVoidMethodA,
jni_GetStaticFieldID,
jni_GetStaticObjectField,
jni_GetStaticBooleanField,
jni_GetStaticByteField,
jni_GetStaticCharField,
jni_GetStaticShortField,
jni_GetStaticIntField,
jni_GetStaticLongField,
jni_GetStaticFloatField,
jni_GetStaticDoubleField,
jni_SetStaticObjectField,
jni_SetStaticBooleanField,
jni_SetStaticByteField,
jni_SetStaticCharField,
jni_SetStaticShortField,
jni_SetStaticIntField,
jni_SetStaticLongField,
jni_SetStaticFloatField,
jni_SetStaticDoubleField,
jni_NewString,
jni_GetStringLength,
jni_GetStringChars,
jni_ReleaseStringChars,
jni_NewStringUTF,
jni_GetStringUTFLength,
jni_GetStringUTFChars,
jni_ReleaseStringUTFChars,
jni_GetArrayLength,
jni_NewObjectArray,
jni_GetObjectArrayElement,
jni_SetObjectArrayElement,
jni_NewBooleanArray,
jni_NewByteArray,
jni_NewCharArray,
jni_NewShortArray,
jni_NewIntArray,
jni_NewLongArray,
jni_NewFloatArray,
jni_NewDoubleArray,
jni_GetBooleanArrayElements,
jni_GetByteArrayElements,
jni_GetCharArrayElements,
jni_GetShortArrayElements,
jni_GetIntArrayElements,
jni_GetLongArrayElements,
jni_GetFloatArrayElements,
jni_GetDoubleArrayElements,
jni_ReleaseBooleanArrayElements,
jni_ReleaseByteArrayElements,
jni_ReleaseCharArrayElements,
jni_ReleaseShortArrayElements,
jni_ReleaseIntArrayElements,
jni_ReleaseLongArrayElements,
jni_ReleaseFloatArrayElements,
jni_ReleaseDoubleArrayElements,
jni_GetBooleanArrayRegion,
jni_GetByteArrayRegion,
jni_GetCharArrayRegion,
jni_GetShortArrayRegion,
jni_GetIntArrayRegion,
jni_GetLongArrayRegion,
jni_GetFloatArrayRegion,
jni_GetDoubleArrayRegion,
jni_SetBooleanArrayRegion,
jni_SetByteArrayRegion,
jni_SetCharArrayRegion,
jni_SetShortArrayRegion,
jni_SetIntArrayRegion,
jni_SetLongArrayRegion,
jni_SetFloatArrayRegion,
jni_SetDoubleArrayRegion,
jni_RegisterNatives,
jni_UnregisterNatives,
jni_MonitorEnter,
jni_MonitorExit,
jni_GetJavaVM,
jni_GetStringRegion,
jni_GetStringUTFRegion,
jni_GetPrimitiveArrayCritical,
jni_ReleasePrimitiveArrayCritical,
jni_GetStringCritical,
jni_ReleaseStringCritical,
jni_NewWeakGlobalRef,
jni_DeleteWeakGlobalRef,
jni_ExceptionCheck,
jni_NewDirectByteBuffer,
jni_GetDirectBufferAddress,
jni_GetDirectBufferCapacity,
// New 1_6 features
jni_GetObjectRefType,
// Module features
jni_GetModule
};
// For jvmti use to modify jni function table.
// Java threads in native contiues to run until it is transitioned
// to VM at safepoint. Before the transition or before it is blocked
// for safepoint it may access jni function table. VM could crash if
// any java thread access the jni function table in the middle of memcpy.
// To avoid this each function pointers are copied automically.
void copy_jni_function_table(const struct JNINativeInterface_ *new_jni_NativeInterface) {
assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint");
intptr_t *a = (intptr_t *) jni_functions();
intptr_t *b = (intptr_t *) new_jni_NativeInterface;
for (uint i=0; i < sizeof(struct JNINativeInterface_)/sizeof(void *); i++) {
Atomic::store(*b++, a++);
}
}
void quicken_jni_functions() {
// Replace Get<Primitive>Field with fast versions
if (UseFastJNIAccessors && !JvmtiExport::can_post_field_access()
&& !VerifyJNIFields && !CountJNICalls && !CheckJNICalls
#if defined(_WINDOWS) && defined(IA32) && defined(COMPILER2)
// windows x86 currently needs SEH wrapper and the gain of the fast
// versions currently isn't certain for server vm on uniprocessor.
&& os::is_MP()
#endif
) {
address func;
func = JNI_FastGetField::generate_fast_get_boolean_field();
if (func != (address)-1) {
jni_NativeInterface.GetBooleanField = (GetBooleanField_t)func;
}
func = JNI_FastGetField::generate_fast_get_byte_field();
if (func != (address)-1) {
jni_NativeInterface.GetByteField = (GetByteField_t)func;
}
func = JNI_FastGetField::generate_fast_get_char_field();
if (func != (address)-1) {
jni_NativeInterface.GetCharField = (GetCharField_t)func;
}
func = JNI_FastGetField::generate_fast_get_short_field();
if (func != (address)-1) {
jni_NativeInterface.GetShortField = (GetShortField_t)func;
}
func = JNI_FastGetField::generate_fast_get_int_field();
if (func != (address)-1) {
jni_NativeInterface.GetIntField = (GetIntField_t)func;
}
func = JNI_FastGetField::generate_fast_get_long_field();
if (func != (address)-1) {
jni_NativeInterface.GetLongField = (GetLongField_t)func;
}
func = JNI_FastGetField::generate_fast_get_float_field();
if (func != (address)-1) {
jni_NativeInterface.GetFloatField = (GetFloatField_t)func;
}
func = JNI_FastGetField::generate_fast_get_double_field();
if (func != (address)-1) {
jni_NativeInterface.GetDoubleField = (GetDoubleField_t)func;
}
}
}
// Returns the function structure
struct JNINativeInterface_* jni_functions() {
#if INCLUDE_JNI_CHECK
if (CheckJNICalls) return jni_functions_check();
#endif // INCLUDE_JNI_CHECK
return &jni_NativeInterface;
}
// Returns the function structure
struct JNINativeInterface_* jni_functions_nocheck() {
return &jni_NativeInterface;
}
// Invocation API
// Forward declaration
extern const struct JNIInvokeInterface_ jni_InvokeInterface;
// Global invocation API vars
volatile int vm_created = 0;
// Indicate whether it is safe to recreate VM
volatile int safe_to_recreate_vm = 1;
struct JavaVM_ main_vm = {&jni_InvokeInterface};
#define JAVASTACKSIZE (400 * 1024) /* Default size of a thread java stack */
enum { VERIFY_NONE, VERIFY_REMOTE, VERIFY_ALL };
DT_RETURN_MARK_DECL(GetDefaultJavaVMInitArgs, jint
, HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_RETURN(_ret_ref));
_JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetDefaultJavaVMInitArgs(void *args_) {
HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_ENTRY(args_);
JDK1_1InitArgs *args = (JDK1_1InitArgs *)args_;
jint ret = JNI_ERR;
DT_RETURN_MARK(GetDefaultJavaVMInitArgs, jint, (const jint&)ret);
if (Threads::is_supported_jni_version(args->version)) {
ret = JNI_OK;
}
// 1.1 style no longer supported in hotspot.
// According the JNI spec, we should update args->version on return.
// We also use the structure to communicate with launcher about default
// stack size.
if (args->version == JNI_VERSION_1_1) {
args->version = JNI_VERSION_1_2;
// javaStackSize is int in arguments structure
assert(jlong(ThreadStackSize) * K < INT_MAX, "integer overflow");
args->javaStackSize = (jint)(ThreadStackSize * K);
}
return ret;
}
DT_RETURN_MARK_DECL(CreateJavaVM, jint
, HOTSPOT_JNI_CREATEJAVAVM_RETURN(_ret_ref));
static jint JNI_CreateJavaVM_inner(JavaVM **vm, void **penv, void *args) {
HOTSPOT_JNI_CREATEJAVAVM_ENTRY((void **) vm, penv, args);
jint result = JNI_ERR;
DT_RETURN_MARK(CreateJavaVM, jint, (const jint&)result);
// We're about to use Atomic::xchg for synchronization. Some Zero
// platforms use the GCC builtin __sync_lock_test_and_set for this,
// but __sync_lock_test_and_set is not guaranteed to do what we want
// on all architectures. So we check it works before relying on it.
#if defined(ZERO) && defined(ASSERT)
{
jint a = 0xcafebabe;
jint b = Atomic::xchg((jint) 0xdeadbeef, &a);
void *c = &a;
void *d = Atomic::xchg(&b, &c);
assert(a == (jint) 0xdeadbeef && b == (jint) 0xcafebabe, "Atomic::xchg() works");
assert(c == &b && d == &a, "Atomic::xchg() works");
}
#endif // ZERO && ASSERT
// At the moment it's only possible to have one Java VM,
// since some of the runtime state is in global variables.
// We cannot use our mutex locks here, since they only work on
// Threads. We do an atomic compare and exchange to ensure only
// one thread can call this method at a time
// We use Atomic::xchg rather than Atomic::add/dec since on some platforms
// the add/dec implementations are dependent on whether we are running
// on a multiprocessor, and at this stage of initialization the os::is_MP
// function used to determine this will always return false. Atomic::xchg
// does not have this problem.
if (Atomic::xchg(1, &vm_created) == 1) {
return JNI_EEXIST; // already created, or create attempt in progress
}
if (Atomic::xchg(0, &safe_to_recreate_vm) == 0) {
return JNI_ERR; // someone tried and failed and retry not allowed.
}
assert(vm_created == 1, "vm_created is true during the creation");
/**
* Certain errors during initialization are recoverable and do not
* prevent this method from being called again at a later time
* (perhaps with different arguments). However, at a certain
* point during initialization if an error occurs we cannot allow
* this function to be called again (or it will crash). In those
* situations, the 'canTryAgain' flag is set to false, which atomically
* sets safe_to_recreate_vm to 1, such that any new call to
* JNI_CreateJavaVM will immediately fail using the above logic.
*/
bool can_try_again = true;
result = Threads::create_vm((JavaVMInitArgs*) args, &can_try_again);
if (result == JNI_OK) {
JavaThread *thread = JavaThread::current();
assert(!thread->has_pending_exception(), "should have returned not OK");
/* thread is thread_in_vm here */
*vm = (JavaVM *)(&main_vm);
*(JNIEnv**)penv = thread->jni_environment();
#if INCLUDE_JVMCI
if (EnableJVMCI) {
if (UseJVMCICompiler) {
// JVMCI is initialized on a CompilerThread
if (BootstrapJVMCI) {
JavaThread* THREAD = thread;
JVMCICompiler* compiler = JVMCICompiler::instance(true, CATCH);
compiler->bootstrap(THREAD);
if (HAS_PENDING_EXCEPTION) {
HandleMark hm;
vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION));
}
}
}
}
#endif
// Tracks the time application was running before GC
RuntimeService::record_application_start();
// Notify JVMTI
if (JvmtiExport::should_post_thread_life()) {
JvmtiExport::post_thread_start(thread);
}
EventThreadStart event;
if (event.should_commit()) {
event.set_thread(THREAD_TRACE_ID(thread));
event.commit();
}
#ifndef PRODUCT
// Check if we should compile all classes on bootclasspath
if (CompileTheWorld) ClassLoader::compile_the_world();
if (ReplayCompiles) ciReplay::replay(thread);
// Some platforms (like Win*) need a wrapper around these test
// functions in order to properly handle error conditions.
VMError::test_error_handler();
if (ExecuteInternalVMTests) {
InternalVMTests::run();
}
#endif
// Since this is not a JVM_ENTRY we have to set the thread state manually before leaving.
ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native);
} else {
// If create_vm exits because of a pending exception, exit with that
// exception. In the future when we figure out how to reclaim memory,
// we may be able to exit with JNI_ERR and allow the calling application
// to continue.
if (Universe::is_fully_initialized()) {
// otherwise no pending exception possible - VM will already have aborted
JavaThread* THREAD = JavaThread::current();
if (HAS_PENDING_EXCEPTION) {
HandleMark hm;
vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION));
}
}
if (can_try_again) {
// reset safe_to_recreate_vm to 1 so that retrial would be possible
safe_to_recreate_vm = 1;
}
// Creation failed. We must reset vm_created
*vm = 0;
*(JNIEnv**)penv = 0;
// reset vm_created last to avoid race condition. Use OrderAccess to
// control both compiler and architectural-based reordering.
OrderAccess::release_store(&vm_created, 0);
}
// Flush stdout and stderr before exit.
fflush(stdout);
fflush(stderr);
return result;
}
_JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_CreateJavaVM(JavaVM **vm, void **penv, void *args) {
jint result = JNI_ERR;
// On Windows, let CreateJavaVM run with SEH protection
#ifdef _WIN32
__try {
#endif
result = JNI_CreateJavaVM_inner(vm, penv, args);
#ifdef _WIN32
} __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) {
// Nothing to do.
}
#endif
return result;
}
_JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetCreatedJavaVMs(JavaVM **vm_buf, jsize bufLen, jsize *numVMs) {
// See bug 4367188, the wrapper can sometimes cause VM crashes
// JNIWrapper("GetCreatedJavaVMs");
HOTSPOT_JNI_GETCREATEDJAVAVMS_ENTRY((void **) vm_buf, bufLen, (uintptr_t *) numVMs);
if (vm_created == 1) {
if (numVMs != NULL) *numVMs = 1;
if (bufLen > 0) *vm_buf = (JavaVM *)(&main_vm);
} else {
if (numVMs != NULL) *numVMs = 0;
}
HOTSPOT_JNI_GETCREATEDJAVAVMS_RETURN(JNI_OK);
return JNI_OK;
}
extern "C" {
DT_RETURN_MARK_DECL(DestroyJavaVM, jint
, HOTSPOT_JNI_DESTROYJAVAVM_RETURN(_ret_ref));
static jint JNICALL jni_DestroyJavaVM_inner(JavaVM *vm) {
HOTSPOT_JNI_DESTROYJAVAVM_ENTRY(vm);
jint res = JNI_ERR;
DT_RETURN_MARK(DestroyJavaVM, jint, (const jint&)res);
if (vm_created == 0) {
res = JNI_ERR;
return res;
}
JNIWrapper("DestroyJavaVM");
JNIEnv *env;
JavaVMAttachArgs destroyargs;
destroyargs.version = CurrentVersion;
destroyargs.name = (char *)"DestroyJavaVM";
destroyargs.group = NULL;
res = vm->AttachCurrentThread((void **)&env, (void *)&destroyargs);
if (res != JNI_OK) {
return res;
}
// Since this is not a JVM_ENTRY we have to set the thread state manually before entering.
JavaThread* thread = JavaThread::current();
ThreadStateTransition::transition_from_native(thread, _thread_in_vm);
if (Threads::destroy_vm()) {
// Should not change thread state, VM is gone
vm_created = 0;
res = JNI_OK;
return res;
} else {
ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native);
res = JNI_ERR;
return res;
}
}
jint JNICALL jni_DestroyJavaVM(JavaVM *vm) {
jint result = JNI_ERR;
// On Windows, we need SEH protection
#ifdef _WIN32
__try {
#endif
result = jni_DestroyJavaVM_inner(vm);
#ifdef _WIN32
} __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) {
// Nothing to do.
}
#endif
return result;
}
static jint attach_current_thread(JavaVM *vm, void **penv, void *_args, bool daemon) {
JavaVMAttachArgs *args = (JavaVMAttachArgs *) _args;
// Check below commented out from JDK1.2fcs as well
/*
if (args && (args->version != JNI_VERSION_1_1 || args->version != JNI_VERSION_1_2)) {
return JNI_EVERSION;
}
*/
Thread* t = Thread::current_or_null();
if (t != NULL) {
// If the thread has been attached this operation is a no-op
*(JNIEnv**)penv = ((JavaThread*) t)->jni_environment();
return JNI_OK;
}
// Create a thread and mark it as attaching so it will be skipped by the
// ThreadsListEnumerator - see CR 6404306
JavaThread* thread = new JavaThread(true);
// Set correct safepoint info. The thread is going to call into Java when
// initializing the Java level thread object. Hence, the correct state must
// be set in order for the Safepoint code to deal with it correctly.
thread->set_thread_state(_thread_in_vm);
thread->record_stack_base_and_size();
thread->initialize_thread_current();
if (!os::create_attached_thread(thread)) {
thread->smr_delete();
return JNI_ERR;
}
// Enable stack overflow checks
thread->create_stack_guard_pages();
thread->initialize_tlab();
thread->cache_global_variables();
// Crucial that we do not have a safepoint check for this thread, since it has
// not been added to the Thread list yet.
{ Threads_lock->lock_without_safepoint_check();
// This must be inside this lock in order to get FullGCALot to work properly, i.e., to
// avoid this thread trying to do a GC before it is added to the thread-list
thread->set_active_handles(JNIHandleBlock::allocate_block());
Threads::add(thread, daemon);
Threads_lock->unlock();
}
// Create thread group and name info from attach arguments
oop group = NULL;
char* thread_name = NULL;
if (args != NULL && Threads::is_supported_jni_version(args->version)) {
group = JNIHandles::resolve(args->group);
thread_name = args->name; // may be NULL
}
if (group == NULL) group = Universe::main_thread_group();
// Create Java level thread object and attach it to this thread
bool attach_failed = false;
{
EXCEPTION_MARK;
HandleMark hm(THREAD);
Handle thread_group(THREAD, group);
thread->allocate_threadObj(thread_group, thread_name, daemon, THREAD);
if (HAS_PENDING_EXCEPTION) {
CLEAR_PENDING_EXCEPTION;
// cleanup outside the handle mark.
attach_failed = true;
}
}
if (attach_failed) {
// Added missing cleanup
thread->cleanup_failed_attach_current_thread();
return JNI_ERR;
}
// mark the thread as no longer attaching
// this uses a fence to push the change through so we don't have
// to regrab the threads_lock
thread->set_done_attaching_via_jni();
// Set java thread status.
java_lang_Thread::set_thread_status(thread->threadObj(),
java_lang_Thread::RUNNABLE);
// Notify the debugger
if (JvmtiExport::should_post_thread_life()) {
JvmtiExport::post_thread_start(thread);
}
EventThreadStart event;
if (event.should_commit()) {
event.set_thread(THREAD_TRACE_ID(thread));
event.commit();
}
*(JNIEnv**)penv = thread->jni_environment();
// Now leaving the VM, so change thread_state. This is normally automatically taken care
// of in the JVM_ENTRY. But in this situation we have to do it manually. Notice, that by
// using ThreadStateTransition::transition, we do a callback to the safepoint code if
// needed.
ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native);
// Perform any platform dependent FPU setup
os::setup_fpu();
return JNI_OK;
}
jint JNICALL jni_AttachCurrentThread(JavaVM *vm, void **penv, void *_args) {
HOTSPOT_JNI_ATTACHCURRENTTHREAD_ENTRY(vm, penv, _args);
if (vm_created == 0) {
HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
return JNI_ERR;
}
JNIWrapper("AttachCurrentThread");
jint ret = attach_current_thread(vm, penv, _args, false);
HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN(ret);
return ret;
}
jint JNICALL jni_DetachCurrentThread(JavaVM *vm) {
HOTSPOT_JNI_DETACHCURRENTTHREAD_ENTRY(vm);
JNIWrapper("DetachCurrentThread");
// If the thread has already been detached the operation is a no-op
if (Thread::current_or_null() == NULL) {
HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK);
return JNI_OK;
}
VM_Exit::block_if_vm_exited();
JavaThread* thread = JavaThread::current();
if (thread->has_last_Java_frame()) {
HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
// Can't detach a thread that's running java, that can't work.
return JNI_ERR;
}
// Safepoint support. Have to do call-back to safepoint code, if in the
// middle of a safepoint operation
ThreadStateTransition::transition_from_native(thread, _thread_in_vm);
// XXX: Note that JavaThread::exit() call below removes the guards on the
// stack pages set up via enable_stack_{red,yellow}_zone() calls
// above in jni_AttachCurrentThread. Unfortunately, while the setting
// of the guards is visible in jni_AttachCurrentThread above,
// the removal of the guards is buried below in JavaThread::exit()
// here. The abstraction should be more symmetrically either exposed
// or hidden (e.g. it could probably be hidden in the same
// (platform-dependent) methods where we do alternate stack
// maintenance work?)
thread->exit(false, JavaThread::jni_detach);
thread->smr_delete();
HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK);
return JNI_OK;
}
DT_RETURN_MARK_DECL(GetEnv, jint
, HOTSPOT_JNI_GETENV_RETURN(_ret_ref));
jint JNICALL jni_GetEnv(JavaVM *vm, void **penv, jint version) {
HOTSPOT_JNI_GETENV_ENTRY(vm, penv, version);
jint ret = JNI_ERR;
DT_RETURN_MARK(GetEnv, jint, (const jint&)ret);
if (vm_created == 0) {
*penv = NULL;
ret = JNI_EDETACHED;
return ret;
}
if (JniExportedInterface::GetExportedInterface(vm, penv, version, &ret)) {
return ret;
}
#ifndef JVMPI_VERSION_1
// need these in order to be polite about older agents
#define JVMPI_VERSION_1 ((jint)0x10000001)
#define JVMPI_VERSION_1_1 ((jint)0x10000002)
#define JVMPI_VERSION_1_2 ((jint)0x10000003)
#endif // !JVMPI_VERSION_1
Thread* thread = Thread::current_or_null();
if (thread != NULL && thread->is_Java_thread()) {
if (Threads::is_supported_jni_version_including_1_1(version)) {
*(JNIEnv**)penv = ((JavaThread*) thread)->jni_environment();
ret = JNI_OK;
return ret;
} else if (version == JVMPI_VERSION_1 ||
version == JVMPI_VERSION_1_1 ||
version == JVMPI_VERSION_1_2) {
tty->print_cr("ERROR: JVMPI, an experimental interface, is no longer supported.");
tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI).");
ret = JNI_EVERSION;
return ret;
} else if (JvmtiExport::is_jvmdi_version(version)) {
tty->print_cr("FATAL ERROR: JVMDI is no longer supported.");
tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI).");
ret = JNI_EVERSION;
return ret;
} else {
*penv = NULL;
ret = JNI_EVERSION;
return ret;
}
} else {
*penv = NULL;
ret = JNI_EDETACHED;
return ret;
}
}
jint JNICALL jni_AttachCurrentThreadAsDaemon(JavaVM *vm, void **penv, void *_args) {
HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_ENTRY(vm, penv, _args);
if (vm_created == 0) {
HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN((uint32_t) JNI_ERR);
return JNI_ERR;
}
JNIWrapper("AttachCurrentThreadAsDaemon");
jint ret = attach_current_thread(vm, penv, _args, true);
HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN(ret);
return ret;
}
} // End extern "C"
const struct JNIInvokeInterface_ jni_InvokeInterface = {
NULL,
NULL,
NULL,
jni_DestroyJavaVM,
jni_AttachCurrentThread,
jni_DetachCurrentThread,
jni_GetEnv,
jni_AttachCurrentThreadAsDaemon
};