1 /*

        2  * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved.

        3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

        4  *

        5  * This code is free software; you can redistribute it and/or modify it

        6  * under the terms of the GNU General Public License version 2 only, as

        7  * published by the Free Software Foundation.

        8  *

        9  * This code is distributed in the hope that it will be useful, but WITHOUT

       10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

       11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

       12  * version 2 for more details (a copy is included in the LICENSE file that

       13  * accompanied this code).

       14  *

       15  * You should have received a copy of the GNU General Public License version

       16  * 2 along with this work; if not, write to the Free Software Foundation,

       17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

       18  *

       19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

       20  * or visit www.oracle.com if you need additional information or have any

       21  * questions.

       22  *

       23  */

       24 

       25 #include "precompiled.hpp"

       26 #include "classfile/classLoader.hpp"

       27 #include "classfile/javaClasses.hpp"

       28 #include "classfile/symbolTable.hpp"

       29 #include "classfile/systemDictionary.hpp"

       30 #include "classfile/vmSymbols.hpp"

       31 #include "interpreter/linkResolver.hpp"

       32 #ifndef SERIALGC

       33 #include "gc_implementation/g1/g1SATBCardTableModRefBS.hpp"

       34 #endif // SERIALGC

       35 #include "memory/allocation.inline.hpp"

       36 #include "memory/gcLocker.inline.hpp"

       37 #include "memory/oopFactory.hpp"

       38 #include "memory/universe.inline.hpp"

       39 #include "oops/instanceKlass.hpp"

       40 #include "oops/instanceOop.hpp"

       41 #include "oops/markOop.hpp"

       42 #include "oops/methodOop.hpp"

       43 #include "oops/objArrayKlass.hpp"

       44 #include "oops/objArrayOop.hpp"

       45 #include "oops/oop.inline.hpp"

       46 #include "oops/symbol.hpp"

       47 #include "oops/typeArrayKlass.hpp"

       48 #include "oops/typeArrayOop.hpp"

       49 #include "prims/jni.h"

       50 #include "prims/jniCheck.hpp"

       51 #include "prims/jniFastGetField.hpp"

       52 #include "prims/jvm.h"

       53 #include "prims/jvm_misc.hpp"

       54 #include "prims/jvmtiExport.hpp"

       55 #include "prims/jvmtiThreadState.hpp"

       56 #include "runtime/compilationPolicy.hpp"

       57 #include "runtime/fieldDescriptor.hpp"

       58 #include "runtime/fprofiler.hpp"

       59 #include "runtime/handles.inline.hpp"

       60 #include "runtime/interfaceSupport.hpp"

       61 #include "runtime/java.hpp"

       62 #include "runtime/javaCalls.hpp"

       63 #include "runtime/jfieldIDWorkaround.hpp"

       64 #include "runtime/reflection.hpp"

       65 #include "runtime/sharedRuntime.hpp"

       66 #include "runtime/signature.hpp"

       67 #include "runtime/vm_operations.hpp"

       68 #include "services/runtimeService.hpp"

       69 #include "utilities/defaultStream.hpp"

       70 #include "utilities/dtrace.hpp"

       71 #include "utilities/events.hpp"

       72 #include "utilities/histogram.hpp"

       73 #ifdef TARGET_ARCH_x86

       74 # include "jniTypes_x86.hpp"

       75 #endif

       76 #ifdef TARGET_ARCH_sparc

       77 # include "jniTypes_sparc.hpp"

       78 #endif

       79 #ifdef TARGET_ARCH_zero

       80 # include "jniTypes_zero.hpp"

       81 #endif

       82 #ifdef TARGET_OS_FAMILY_linux

       83 # include "os_linux.inline.hpp"

       84 # include "thread_linux.inline.hpp"

       85 #endif

       86 #ifdef TARGET_OS_FAMILY_solaris

       87 # include "os_solaris.inline.hpp"

       88 # include "thread_solaris.inline.hpp"

       89 #endif

       90 #ifdef TARGET_OS_FAMILY_windows

       91 # include "os_windows.inline.hpp"

       92 # include "thread_windows.inline.hpp"

       93 #endif

       94 

       95 static jint CurrentVersion = JNI_VERSION_1_6;

       96 

       97 

       98 // The DT_RETURN_MARK macros create a scoped object to fire the dtrace

       99 // '-return' probe regardless of the return path is taken out of the function.

      100 // Methods that have multiple return paths use this to avoid having to

      101 // instrument each return path.  Methods that use CHECK or THROW must use this

      102 // since those macros can cause an immedate uninstrumented return.

      103 //

      104 // In order to get the return value, a reference to the variable containing

      105 // the return value must be passed to the contructor of the object, and

      106 // the return value must be set before return (since the mark object has

      107 // a reference to it).

      108 //

      109 // Example:

      110 // DT_RETURN_MARK_DECL(SomeFunc, int);

      111 // JNI_ENTRY(int, SomeFunc, ...)

      112 //   int return_value = 0;

      113 //   DT_RETURN_MARK(SomeFunc, int, (const int&)return_value);

      114 //   foo(CHECK_0)

      115 //   return_value = 5;

      116 //   return return_value;

      117 // JNI_END

      118 #define DT_RETURN_MARK_DECL(name, type)                                    \

      119   HS_DTRACE_PROBE_DECL1(hotspot_jni, name##__return, type);                \

      120   DTRACE_ONLY(                                                             \

      121     class DTraceReturnProbeMark_##name {                                   \

      122      public:                                                               \

      123       const type& _ret_ref;                                                \

      124       DTraceReturnProbeMark_##name(const type& v) : _ret_ref(v) {}         \

      125       ~DTraceReturnProbeMark_##name() {                                    \

      126         HS_DTRACE_PROBE1(hotspot_jni, name##__return, _ret_ref);           \

      127       }                                                                    \

      128     }                                                                      \

      129   )

      130 // Void functions are simpler since there's no return value

      131 #define DT_VOID_RETURN_MARK_DECL(name)                                     \

      132   HS_DTRACE_PROBE_DECL0(hotspot_jni, name##__return);                      \

      133   DTRACE_ONLY(                                                             \

      134     class DTraceReturnProbeMark_##name {                                   \

      135      public:                                                               \

      136       ~DTraceReturnProbeMark_##name() {                                    \

      137         HS_DTRACE_PROBE0(hotspot_jni, name##__return);                     \

      138       }                                                                    \

      139     }                                                                      \

      140   )

      141 

      142 

      143 // Place these macros in the function to mark the return.  Non-void

      144 // functions need the type and address of the return value.

      145 #define DT_RETURN_MARK(name, type, ref) \

      146   DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark(ref) )

      147 #define DT_VOID_RETURN_MARK(name) \

      148   DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark )

      149 

      150 

      151 // Use these to select distinct code for floating-point vs. non-floating point

      152 // situations.  Used from within common macros where we need slightly

      153 // different behavior for Float/Double

      154 #define FP_SELECT_Boolean(intcode, fpcode) intcode

      155 #define FP_SELECT_Byte(intcode, fpcode)    intcode

      156 #define FP_SELECT_Char(intcode, fpcode)    intcode

      157 #define FP_SELECT_Short(intcode, fpcode)   intcode

      158 #define FP_SELECT_Object(intcode, fpcode)  intcode

      159 #define FP_SELECT_Int(intcode, fpcode)     intcode

      160 #define FP_SELECT_Long(intcode, fpcode)    intcode

      161 #define FP_SELECT_Float(intcode, fpcode)   fpcode

      162 #define FP_SELECT_Double(intcode, fpcode)  fpcode

      163 #define FP_SELECT(TypeName, intcode, fpcode) \

      164   FP_SELECT_##TypeName(intcode, fpcode)

      165 

      166 #define COMMA ,

      167 

      168 // Choose DT_RETURN_MARK macros  based on the type: float/double -> void

      169 // (dtrace doesn't do FP yet)

      170 #define DT_RETURN_MARK_DECL_FOR(TypeName, name, type) \

      171   FP_SELECT(TypeName, \

      172     DT_RETURN_MARK_DECL(name, type), DT_VOID_RETURN_MARK_DECL(name) )

      173 #define DT_RETURN_MARK_FOR(TypeName, name, type, ref) \

      174   FP_SELECT(TypeName, \

      175     DT_RETURN_MARK(name, type, ref), DT_VOID_RETURN_MARK(name) )

      176 

      177 

      178 // out-of-line helpers for class jfieldIDWorkaround:

      179 

      180 bool jfieldIDWorkaround::is_valid_jfieldID(klassOop k, jfieldID id) {

      181   if (jfieldIDWorkaround::is_instance_jfieldID(k, id)) {

      182     uintptr_t as_uint = (uintptr_t) id;

      183     intptr_t offset = raw_instance_offset(id);

      184     if (is_checked_jfieldID(id)) {

      185       if (!klass_hash_ok(k, id)) {

      186         return false;

      187       }

      188     }

      189     return instanceKlass::cast(k)->contains_field_offset(offset);

      190   } else {

      191     JNIid* result = (JNIid*) id;

      192 #ifdef ASSERT

      193     return result != NULL && result->is_static_field_id();

      194 #else

      195     return result != NULL;

      196 #endif

      197   }

      198 }

      199 

      200 

      201 intptr_t jfieldIDWorkaround::encode_klass_hash(klassOop k, intptr_t offset) {

      202   if (offset <= small_offset_mask) {

      203     klassOop field_klass = k;

      204     klassOop super_klass = Klass::cast(field_klass)->super();

      205     // With compressed oops the most super class with nonstatic fields would

      206     // be the owner of fields embedded in the header.

      207     while (instanceKlass::cast(super_klass)->has_nonstatic_fields() &&

      208            instanceKlass::cast(super_klass)->contains_field_offset(offset)) {

      209       field_klass = super_klass;   // super contains the field also

      210       super_klass = Klass::cast(field_klass)->super();

      211     }

      212     debug_only(No_Safepoint_Verifier nosafepoint;)

      213     uintptr_t klass_hash = field_klass->identity_hash();

      214     return ((klass_hash & klass_mask) << klass_shift) | checked_mask_in_place;

      215   } else {

      216 #if 0

      217     #ifndef PRODUCT

      218     {

      219       ResourceMark rm;

      220       warning("VerifyJNIFields: long offset %d in %s", offset, Klass::cast(k)->external_name());

      221     }

      222     #endif

      223 #endif

      224     return 0;

      225   }

      226 }

      227 

      228 bool jfieldIDWorkaround::klass_hash_ok(klassOop k, jfieldID id) {

      229   uintptr_t as_uint = (uintptr_t) id;

      230   intptr_t klass_hash = (as_uint >> klass_shift) & klass_mask;

      231   do {

      232     debug_only(No_Safepoint_Verifier nosafepoint;)

      233     // Could use a non-blocking query for identity_hash here...

      234     if ((k->identity_hash() & klass_mask) == klass_hash)

      235       return true;

      236     k = Klass::cast(k)->super();

      237   } while (k != NULL);

      238   return false;

      239 }

      240 

      241 void jfieldIDWorkaround::verify_instance_jfieldID(klassOop k, jfieldID id) {

      242   guarantee(jfieldIDWorkaround::is_instance_jfieldID(k, id), "must be an instance field" );

      243   uintptr_t as_uint = (uintptr_t) id;

      244   intptr_t offset = raw_instance_offset(id);

      245   if (VerifyJNIFields) {

      246     if (is_checked_jfieldID(id)) {

      247       guarantee(klass_hash_ok(k, id),

      248     "Bug in native code: jfieldID class must match object");

      249     } else {

      250 #if 0

      251       #ifndef PRODUCT

      252       if (Verbose) {

      253   ResourceMark rm;

      254   warning("VerifyJNIFields: unverified offset %d for %s", offset, Klass::cast(k)->external_name());

      255       }

      256       #endif

      257 #endif

      258     }

      259   }

      260   guarantee(instanceKlass::cast(k)->contains_field_offset(offset),

      261       "Bug in native code: jfieldID offset must address interior of object");

      262 }

      263 

      264 // Pick a reasonable higher bound for local capacity requested

      265 // for EnsureLocalCapacity and PushLocalFrame.  We don't want it too

      266 // high because a test (or very unusual application) may try to allocate

      267 // that many handles and run out of swap space.  An implementation is

      268 // permitted to allocate more handles than the ensured capacity, so this

      269 // value is set high enough to prevent compatibility problems.

      270 const int MAX_REASONABLE_LOCAL_CAPACITY = 4*K;

      271 

      272 

      273 // Wrapper to trace JNI functions

      274 

      275 #ifdef ASSERT

      276   Histogram* JNIHistogram;

      277   static volatile jint JNIHistogram_lock = 0;

      278 

      279   class JNITraceWrapper : public StackObj {

      280    public:

      281     JNITraceWrapper(const char* format, ...) {

      282       if (TraceJNICalls) {

      283         va_list ap;

      284         va_start(ap, format);

      285         tty->print("JNI ");

      286         tty->vprint_cr(format, ap);

      287         va_end(ap);

      288       }

      289     }

      290   };

      291 

      292   class JNIHistogramElement : public HistogramElement {

      293     public:

      294      JNIHistogramElement(const char* name);

      295   };

      296 

      297   JNIHistogramElement::JNIHistogramElement(const char* elementName) {

      298     _name = elementName;

      299     uintx count = 0;

      300 

      301     while (Atomic::cmpxchg(1, &JNIHistogram_lock, 0) != 0) {

      302       while (OrderAccess::load_acquire(&JNIHistogram_lock) != 0) {

      303         count +=1;

      304         if ( (WarnOnStalledSpinLock > 0)

      305           && (count % WarnOnStalledSpinLock == 0)) {

      306           warning("JNIHistogram_lock seems to be stalled");

      307         }

      308       }

      309      }

      310 

      311 

      312     if(JNIHistogram == NULL)

      313       JNIHistogram = new Histogram("JNI Call Counts",100);

      314 

      315     JNIHistogram->add_element(this);

      316     Atomic::dec(&JNIHistogram_lock);

      317   }

      318 

      319   #define JNICountWrapper(arg)                                     \

      320      static JNIHistogramElement* e = new JNIHistogramElement(arg); \

      321       /* There is a MT-race condition in VC++. So we need to make sure that that e has been initialized */ \

      322      if (e != NULL) e->increment_count()

      323   #define JNIWrapper(arg) JNICountWrapper(arg); JNITraceWrapper(arg)

      324 #else

      325   #define JNIWrapper(arg)

      326 #endif

      327 

      328 

      329 // Implementation of JNI entries

      330 

      331 DT_RETURN_MARK_DECL(DefineClass, jclass);

      332 

      333 JNI_ENTRY(jclass, jni_DefineClass(JNIEnv *env, const char *name, jobject loaderRef,

      334                                   const jbyte *buf, jsize bufLen))

      335   JNIWrapper("DefineClass");

      336 

      337   DTRACE_PROBE5(hotspot_jni, DefineClass__entry,

      338     env, name, loaderRef, buf, bufLen);

      339   jclass cls = NULL;

      340   DT_RETURN_MARK(DefineClass, jclass, (const jclass&)cls);

      341 

      342   // Since exceptions can be thrown, class initialization can take place

      343   // if name is NULL no check for class name in .class stream has to be made.

      344   if (name != NULL) {

      345     const int str_len = (int)strlen(name);

      346     if (str_len > Symbol::max_length()) {

      347       // It's impossible to create this class;  the name cannot fit

      348       // into the constant pool.

      349       THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);

      350     }

      351   }

      352   TempNewSymbol class_name = SymbolTable::new_symbol(name, THREAD);

      353 

      354   ResourceMark rm(THREAD);

      355   ClassFileStream st((u1*) buf, bufLen, NULL);

      356   Handle class_loader (THREAD, JNIHandles::resolve(loaderRef));

      357 

      358   if (UsePerfData && !class_loader.is_null()) {

      359     // check whether the current caller thread holds the lock or not.

      360     // If not, increment the corresponding counter

      361     if (ObjectSynchronizer::

      362         query_lock_ownership((JavaThread*)THREAD, class_loader) !=

      363         ObjectSynchronizer::owner_self) {

      364       ClassLoader::sync_JNIDefineClassLockFreeCounter()->inc();

      365     }

      366   }

      367   klassOop k = SystemDictionary::resolve_from_stream(class_name, class_loader,

      368                                                      Handle(), &st, true,

      369                                                      CHECK_NULL);

      370 

      371   if (TraceClassResolution && k != NULL) {

      372     trace_class_resolution(k);

      373   }

      374 

      375   cls = (jclass)JNIHandles::make_local(

      376     env, Klass::cast(k)->java_mirror());

      377   return cls;

      378 JNI_END

      379 

      380 

      381 

      382 static bool first_time_FindClass = true;

      383 

      384 DT_RETURN_MARK_DECL(FindClass, jclass);

      385 

      386 JNI_ENTRY(jclass, jni_FindClass(JNIEnv *env, const char *name))

      387   JNIWrapper("FindClass");

      388   DTRACE_PROBE2(hotspot_jni, FindClass__entry, env, name);

      389 

      390   jclass result = NULL;

      391   DT_RETURN_MARK(FindClass, jclass, (const jclass&)result);

      392 

      393   // Remember if we are the first invocation of jni_FindClass

      394   bool first_time = first_time_FindClass;

      395   first_time_FindClass = false;

      396 

      397   // Sanity check the name:  it cannot be null or larger than the maximum size

      398   // name we can fit in the constant pool.

      399   if (name == NULL || (int)strlen(name) > Symbol::max_length()) {

      400     THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);

      401   }

      402 

      403   //%note jni_3

      404   Handle loader;

      405   Handle protection_domain;

      406   // Find calling class

      407   instanceKlassHandle k (THREAD, thread->security_get_caller_class(0));

      408   if (k.not_null()) {

      409     loader = Handle(THREAD, k->class_loader());

      410     // Special handling to make sure JNI_OnLoad and JNI_OnUnload are executed

      411     // in the correct class context.

      412     if (loader.is_null() &&

      413         k->name() == vmSymbols::java_lang_ClassLoader_NativeLibrary()) {

      414       JavaValue result(T_OBJECT);

      415       JavaCalls::call_static(&result, k,

      416                                       vmSymbols::getFromClass_name(),

      417                                       vmSymbols::void_class_signature(),

      418                                       thread);

      419       if (HAS_PENDING_EXCEPTION) {

      420         Handle ex(thread, thread->pending_exception());

      421         CLEAR_PENDING_EXCEPTION;

      422         THROW_HANDLE_0(ex);

      423       }

      424       oop mirror = (oop) result.get_jobject();

      425       loader = Handle(THREAD,

      426         instanceKlass::cast(java_lang_Class::as_klassOop(mirror))->class_loader());

      427       protection_domain = Handle(THREAD,

      428         instanceKlass::cast(java_lang_Class::as_klassOop(mirror))->protection_domain());

      429     }

      430   } else {

      431     // We call ClassLoader.getSystemClassLoader to obtain the system class loader.

      432     loader = Handle(THREAD, SystemDictionary::java_system_loader());

      433   }

      434 

      435   TempNewSymbol sym = SymbolTable::new_symbol(name, CHECK_NULL);

      436   result = find_class_from_class_loader(env, sym, true, loader,

      437                                         protection_domain, true, thread);

      438 

      439   if (TraceClassResolution && result != NULL) {

      440     trace_class_resolution(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(result)));

      441   }

      442 

      443   // If we were the first invocation of jni_FindClass, we enable compilation again

      444   // rather than just allowing invocation counter to overflow and decay.

      445   // Controlled by flag DelayCompilationDuringStartup.

      446   if (first_time && !CompileTheWorld)

      447     CompilationPolicy::completed_vm_startup();

      448 

      449   return result;

      450 JNI_END

      451 

      452 DT_RETURN_MARK_DECL(FromReflectedMethod, jmethodID);

      453 

      454 JNI_ENTRY(jmethodID, jni_FromReflectedMethod(JNIEnv *env, jobject method))

      455   JNIWrapper("FromReflectedMethod");

      456   DTRACE_PROBE2(hotspot_jni, FromReflectedMethod__entry, env, method);

      457   jmethodID ret = NULL;

      458   DT_RETURN_MARK(FromReflectedMethod, jmethodID, (const jmethodID&)ret);

      459 

      460   // method is a handle to a java.lang.reflect.Method object

      461   oop reflected  = JNIHandles::resolve_non_null(method);

      462   oop mirror     = NULL;

      463   int slot       = 0;

      464 

      465   if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) {

      466     mirror = java_lang_reflect_Constructor::clazz(reflected);

      467     slot   = java_lang_reflect_Constructor::slot(reflected);

      468   } else {

      469     assert(reflected->klass() == SystemDictionary::reflect_Method_klass(), "wrong type");

      470     mirror = java_lang_reflect_Method::clazz(reflected);

      471     slot   = java_lang_reflect_Method::slot(reflected);

      472   }

      473   klassOop k     = java_lang_Class::as_klassOop(mirror);

      474 

      475   KlassHandle k1(THREAD, k);

      476   // Make sure class is initialized before handing id's out to methods

      477   Klass::cast(k1())->initialize(CHECK_NULL);

      478   methodOop m = instanceKlass::cast(k1())->method_with_idnum(slot);

      479   ret = m==NULL? NULL : m->jmethod_id();  // return NULL if reflected method deleted

      480   return ret;

      481 JNI_END

      482 

      483 DT_RETURN_MARK_DECL(FromReflectedField, jfieldID);

      484 

      485 JNI_ENTRY(jfieldID, jni_FromReflectedField(JNIEnv *env, jobject field))

      486   JNIWrapper("FromReflectedField");

      487   DTRACE_PROBE2(hotspot_jni, FromReflectedField__entry, env, field);

      488   jfieldID ret = NULL;

      489   DT_RETURN_MARK(FromReflectedField, jfieldID, (const jfieldID&)ret);

      490 

      491   // field is a handle to a java.lang.reflect.Field object

      492   oop reflected   = JNIHandles::resolve_non_null(field);

      493   oop mirror      = java_lang_reflect_Field::clazz(reflected);

      494   klassOop k      = java_lang_Class::as_klassOop(mirror);

      495   int slot        = java_lang_reflect_Field::slot(reflected);

      496   int modifiers   = java_lang_reflect_Field::modifiers(reflected);

      497 

      498   KlassHandle k1(THREAD, k);

      499   // Make sure class is initialized before handing id's out to fields

      500   Klass::cast(k1())->initialize(CHECK_NULL);

      501 

      502   // First check if this is a static field

      503   if (modifiers & JVM_ACC_STATIC) {

      504     intptr_t offset = instanceKlass::cast(k1())->offset_from_fields( slot );

      505     JNIid* id = instanceKlass::cast(k1())->jni_id_for(offset);

      506     assert(id != NULL, "corrupt Field object");

      507     debug_only(id->set_is_static_field_id();)

      508     // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the klassOop

      509     ret = jfieldIDWorkaround::to_static_jfieldID(id);

      510     return ret;

      511   }

      512 

      513   // The slot is the index of the field description in the field-array

      514   // The jfieldID is the offset of the field within the object

      515   // It may also have hash bits for k, if VerifyJNIFields is turned on.

      516   intptr_t offset = instanceKlass::cast(k1())->offset_from_fields( slot );

      517   assert(instanceKlass::cast(k1())->contains_field_offset(offset), "stay within object");

      518   ret = jfieldIDWorkaround::to_instance_jfieldID(k1(), offset);

      519   return ret;

      520 JNI_END

      521 

      522 DT_RETURN_MARK_DECL(ToReflectedMethod, jobject);

      523 

      524 JNI_ENTRY(jobject, jni_ToReflectedMethod(JNIEnv *env, jclass cls, jmethodID method_id, jboolean isStatic))

      525   JNIWrapper("ToReflectedMethod");

      526   DTRACE_PROBE4(hotspot_jni, ToReflectedMethod__entry, env, cls, method_id, isStatic);

      527   jobject ret = NULL;

      528   DT_RETURN_MARK(ToReflectedMethod, jobject, (const jobject&)ret);

      529 

      530   methodHandle m (THREAD, JNIHandles::resolve_jmethod_id(method_id));

      531   assert(m->is_static() == (isStatic != 0), "jni_ToReflectedMethod access flags doesn't match");

      532   oop reflection_method;

      533   if (m->is_initializer()) {

      534     reflection_method = Reflection::new_constructor(m, CHECK_NULL);

      535   } else {

      536     reflection_method = Reflection::new_method(m, UseNewReflection, false, CHECK_NULL);

      537   }

      538   ret = JNIHandles::make_local(env, reflection_method);

      539   return ret;

      540 JNI_END

      541 

      542 DT_RETURN_MARK_DECL(GetSuperclass, jclass);

      543 

      544 JNI_ENTRY(jclass, jni_GetSuperclass(JNIEnv *env, jclass sub))

      545   JNIWrapper("GetSuperclass");

      546   DTRACE_PROBE2(hotspot_jni, GetSuperclass__entry, env, sub);

      547   jclass obj = NULL;

      548   DT_RETURN_MARK(GetSuperclass, jclass, (const jclass&)obj);

      549 

      550   oop mirror = JNIHandles::resolve_non_null(sub);

      551   // primitive classes return NULL

      552   if (java_lang_Class::is_primitive(mirror)) return NULL;

      553 

      554   // Rules of Class.getSuperClass as implemented by KLass::java_super:

      555   // arrays return Object

      556   // interfaces return NULL

      557   // proper classes return Klass::super()

      558   klassOop k = java_lang_Class::as_klassOop(mirror);

      559   if (Klass::cast(k)->is_interface()) return NULL;

      560 

      561   // return mirror for superclass

      562   klassOop super = Klass::cast(k)->java_super();

      563   // super2 is the value computed by the compiler's getSuperClass intrinsic:

      564   debug_only(klassOop super2 = ( Klass::cast(k)->oop_is_javaArray()

      565                                  ? SystemDictionary::Object_klass()

      566                                  : Klass::cast(k)->super() ) );

      567   assert(super == super2,

      568          "java_super computation depends on interface, array, other super");

      569   obj = (super == NULL) ? NULL : (jclass) JNIHandles::make_local(Klass::cast(super)->java_mirror());

      570   return obj;

      571 JNI_END

      572 

      573 JNI_QUICK_ENTRY(jboolean, jni_IsAssignableFrom(JNIEnv *env, jclass sub, jclass super))

      574   JNIWrapper("IsSubclassOf");

      575   DTRACE_PROBE3(hotspot_jni, IsAssignableFrom__entry, env, sub, super);

      576   oop sub_mirror   = JNIHandles::resolve_non_null(sub);

      577   oop super_mirror = JNIHandles::resolve_non_null(super);

      578   if (java_lang_Class::is_primitive(sub_mirror) ||

      579       java_lang_Class::is_primitive(super_mirror)) {

      580     jboolean ret = (sub_mirror == super_mirror);

      581     DTRACE_PROBE1(hotspot_jni, IsAssignableFrom__return, ret);

      582     return ret;

      583   }

      584   klassOop sub_klass   = java_lang_Class::as_klassOop(sub_mirror);

      585   klassOop super_klass = java_lang_Class::as_klassOop(super_mirror);

      586   assert(sub_klass != NULL && super_klass != NULL, "invalid arguments to jni_IsAssignableFrom");

      587   jboolean ret = Klass::cast(sub_klass)->is_subtype_of(super_klass) ?

      588                    JNI_TRUE : JNI_FALSE;

      589   DTRACE_PROBE1(hotspot_jni, IsAssignableFrom__return, ret);

      590   return ret;

      591 JNI_END

      592 

      593 DT_RETURN_MARK_DECL(Throw, jint);

      594 

      595 JNI_ENTRY(jint, jni_Throw(JNIEnv *env, jthrowable obj))

      596   JNIWrapper("Throw");

      597   DTRACE_PROBE2(hotspot_jni, Throw__entry, env, obj);

      598   jint ret = JNI_OK;

      599   DT_RETURN_MARK(Throw, jint, (const jint&)ret);

      600 

      601   THROW_OOP_(JNIHandles::resolve(obj), JNI_OK);

      602   ShouldNotReachHere();

      603 JNI_END

      604 

      605 DT_RETURN_MARK_DECL(ThrowNew, jint);

      606 

      607 JNI_ENTRY(jint, jni_ThrowNew(JNIEnv *env, jclass clazz, const char *message))

      608   JNIWrapper("ThrowNew");

      609   DTRACE_PROBE3(hotspot_jni, ThrowNew__entry, env, clazz, message);

      610   jint ret = JNI_OK;

      611   DT_RETURN_MARK(ThrowNew, jint, (const jint&)ret);

      612 

      613   instanceKlass* k = instanceKlass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(clazz)));

      614   Symbol*  name = k->name();

      615   Handle class_loader (THREAD,  k->class_loader());

      616   Handle protection_domain (THREAD, k->protection_domain());

      617   THROW_MSG_LOADER_(name, (char *)message, class_loader, protection_domain, JNI_OK);

      618   ShouldNotReachHere();

      619 JNI_END

      620 

      621 

      622 // JNI functions only transform a pending async exception to a synchronous

      623 // exception in ExceptionOccurred and ExceptionCheck calls, since

      624 // delivering an async exception in other places won't change the native

      625 // code's control flow and would be harmful when native code further calls

      626 // JNI functions with a pending exception. Async exception is also checked

      627 // during the call, so ExceptionOccurred/ExceptionCheck won't return

      628 // false but deliver the async exception at the very end during

      629 // state transition.

      630 

      631 static void jni_check_async_exceptions(JavaThread *thread) {

      632   assert(thread == Thread::current(), "must be itself");

      633   thread->check_and_handle_async_exceptions();

      634 }

      635 

      636 JNI_ENTRY_NO_PRESERVE(jthrowable, jni_ExceptionOccurred(JNIEnv *env))

      637   JNIWrapper("ExceptionOccurred");

      638   DTRACE_PROBE1(hotspot_jni, ExceptionOccurred__entry, env);

      639   jni_check_async_exceptions(thread);

      640   oop exception = thread->pending_exception();

      641   jthrowable ret = (jthrowable) JNIHandles::make_local(env, exception);

      642   DTRACE_PROBE1(hotspot_jni, ExceptionOccurred__return, ret);

      643   return ret;

      644 JNI_END

      645 

      646 

      647 JNI_ENTRY_NO_PRESERVE(void, jni_ExceptionDescribe(JNIEnv *env))

      648   JNIWrapper("ExceptionDescribe");

      649   DTRACE_PROBE1(hotspot_jni, ExceptionDescribe__entry, env);

      650   if (thread->has_pending_exception()) {

      651     Handle ex(thread, thread->pending_exception());

      652     thread->clear_pending_exception();

      653     if (ex->is_a(SystemDictionary::ThreadDeath_klass())) {

      654       // Don't print anything if we are being killed.

      655     } else {

      656       jio_fprintf(defaultStream::error_stream(), "Exception ");

      657       if (thread != NULL && thread->threadObj() != NULL) {

      658         ResourceMark rm(THREAD);

      659         jio_fprintf(defaultStream::error_stream(),

      660         "in thread \"%s\" ", thread->get_thread_name());

      661       }

      662       if (ex->is_a(SystemDictionary::Throwable_klass())) {

      663         JavaValue result(T_VOID);

      664         JavaCalls::call_virtual(&result,

      665                                 ex,

      666                                 KlassHandle(THREAD,

      667                                   SystemDictionary::Throwable_klass()),

      668                                 vmSymbols::printStackTrace_name(),

      669                                 vmSymbols::void_method_signature(),

      670                                 THREAD);

      671         // If an exception is thrown in the call it gets thrown away. Not much

      672         // we can do with it. The native code that calls this, does not check

      673         // for the exception - hence, it might still be in the thread when DestroyVM gets

      674         // called, potentially causing a few asserts to trigger - since no pending exception

      675         // is expected.

      676         CLEAR_PENDING_EXCEPTION;

      677       } else {

      678         ResourceMark rm(THREAD);

      679         jio_fprintf(defaultStream::error_stream(),

      680         ". Uncaught exception of type %s.",

      681         Klass::cast(ex->klass())->external_name());

      682       }

      683     }

      684   }

      685   DTRACE_PROBE(hotspot_jni, ExceptionDescribe__return);

      686 JNI_END

      687 

      688 

      689 JNI_QUICK_ENTRY(void, jni_ExceptionClear(JNIEnv *env))

      690   JNIWrapper("ExceptionClear");

      691   DTRACE_PROBE1(hotspot_jni, ExceptionClear__entry, env);

      692 

      693   // The jni code might be using this API to clear java thrown exception.

      694   // So just mark jvmti thread exception state as exception caught.

      695   JvmtiThreadState *state = JavaThread::current()->jvmti_thread_state();

      696   if (state != NULL && state->is_exception_detected()) {

      697     state->set_exception_caught();

      698   }

      699   thread->clear_pending_exception();

      700   DTRACE_PROBE(hotspot_jni, ExceptionClear__return);

      701 JNI_END

      702 

      703 

      704 JNI_ENTRY(void, jni_FatalError(JNIEnv *env, const char *msg))

      705   JNIWrapper("FatalError");

      706   DTRACE_PROBE2(hotspot_jni, FatalError__entry, env, msg);

      707   tty->print_cr("FATAL ERROR in native method: %s", msg);

      708   thread->print_stack();

      709   os::abort(); // Dump core and abort

      710 JNI_END

      711 

      712 

      713 JNI_ENTRY(jint, jni_PushLocalFrame(JNIEnv *env, jint capacity))

      714   JNIWrapper("PushLocalFrame");

      715   DTRACE_PROBE2(hotspot_jni, PushLocalFrame__entry, env, capacity);

      716   //%note jni_11

      717   if (capacity < 0 && capacity > MAX_REASONABLE_LOCAL_CAPACITY) {

      718     DTRACE_PROBE1(hotspot_jni, PushLocalFrame__return, JNI_ERR);

      719     return JNI_ERR;

      720   }

      721   JNIHandleBlock* old_handles = thread->active_handles();

      722   JNIHandleBlock* new_handles = JNIHandleBlock::allocate_block(thread);

      723   assert(new_handles != NULL, "should not be NULL");

      724   new_handles->set_pop_frame_link(old_handles);

      725   thread->set_active_handles(new_handles);

      726   jint ret = JNI_OK;

      727   DTRACE_PROBE1(hotspot_jni, PushLocalFrame__return, ret);

      728   return ret;

      729 JNI_END

      730 

      731 

      732 JNI_ENTRY(jobject, jni_PopLocalFrame(JNIEnv *env, jobject result))

      733   JNIWrapper("PopLocalFrame");

      734   DTRACE_PROBE2(hotspot_jni, PopLocalFrame__entry, env, result);

      735   //%note jni_11

      736   Handle result_handle(thread, JNIHandles::resolve(result));

      737   JNIHandleBlock* old_handles = thread->active_handles();

      738   JNIHandleBlock* new_handles = old_handles->pop_frame_link();

      739   if (new_handles != NULL) {

      740     // As a sanity check we only release the handle blocks if the pop_frame_link is not NULL.

      741     // This way code will still work if PopLocalFrame is called without a corresponding

      742     // PushLocalFrame call. Note that we set the pop_frame_link to NULL explicitly, otherwise

      743     // the release_block call will release the blocks.

      744     thread->set_active_handles(new_handles);

      745     old_handles->set_pop_frame_link(NULL);              // clear link we won't release new_handles below

      746     JNIHandleBlock::release_block(old_handles, thread); // may block

      747     result = JNIHandles::make_local(thread, result_handle());

      748   }

      749   DTRACE_PROBE1(hotspot_jni, PopLocalFrame__return, result);

      750   return result;

      751 JNI_END

      752 

      753 

      754 JNI_ENTRY(jobject, jni_NewGlobalRef(JNIEnv *env, jobject ref))

      755   JNIWrapper("NewGlobalRef");

      756   DTRACE_PROBE2(hotspot_jni, NewGlobalRef__entry, env, ref);

      757   Handle ref_handle(thread, JNIHandles::resolve(ref));

      758   jobject ret = JNIHandles::make_global(ref_handle);

      759   DTRACE_PROBE1(hotspot_jni, NewGlobalRef__return, ret);

      760   return ret;

      761 JNI_END

      762 

      763 // Must be JNI_ENTRY (with HandleMark)

      764 JNI_ENTRY_NO_PRESERVE(void, jni_DeleteGlobalRef(JNIEnv *env, jobject ref))

      765   JNIWrapper("DeleteGlobalRef");

      766   DTRACE_PROBE2(hotspot_jni, DeleteGlobalRef__entry, env, ref);

      767   JNIHandles::destroy_global(ref);

      768   DTRACE_PROBE(hotspot_jni, DeleteGlobalRef__return);

      769 JNI_END

      770 

      771 JNI_QUICK_ENTRY(void, jni_DeleteLocalRef(JNIEnv *env, jobject obj))

      772   JNIWrapper("DeleteLocalRef");

      773   DTRACE_PROBE2(hotspot_jni, DeleteLocalRef__entry, env, obj);

      774   JNIHandles::destroy_local(obj);

      775   DTRACE_PROBE(hotspot_jni, DeleteLocalRef__return);

      776 JNI_END

      777 

      778 JNI_QUICK_ENTRY(jboolean, jni_IsSameObject(JNIEnv *env, jobject r1, jobject r2))

      779   JNIWrapper("IsSameObject");

      780   DTRACE_PROBE3(hotspot_jni, IsSameObject__entry, env, r1, r2);

      781   oop a = JNIHandles::resolve(r1);

      782   oop b = JNIHandles::resolve(r2);

      783   jboolean ret = (a == b) ? JNI_TRUE : JNI_FALSE;

      784   DTRACE_PROBE1(hotspot_jni, IsSameObject__return, ret);

      785   return ret;

      786 JNI_END

      787 

      788 

      789 JNI_ENTRY(jobject, jni_NewLocalRef(JNIEnv *env, jobject ref))

      790   JNIWrapper("NewLocalRef");

      791   DTRACE_PROBE2(hotspot_jni, NewLocalRef__entry, env, ref);

      792   jobject ret = JNIHandles::make_local(env, JNIHandles::resolve(ref));

      793   DTRACE_PROBE1(hotspot_jni, NewLocalRef__return, ret);

      794   return ret;

      795 JNI_END

      796 

      797 JNI_LEAF(jint, jni_EnsureLocalCapacity(JNIEnv *env, jint capacity))

      798   JNIWrapper("EnsureLocalCapacity");

      799   DTRACE_PROBE2(hotspot_jni, EnsureLocalCapacity__entry, env, capacity);

      800   jint ret;

      801   if (capacity >= 0 && capacity <= MAX_REASONABLE_LOCAL_CAPACITY) {

      802     ret = JNI_OK;

      803   } else {

      804     ret = JNI_ERR;

      805   }

      806   DTRACE_PROBE1(hotspot_jni, EnsureLocalCapacity__return, ret);

      807   return ret;

      808 JNI_END

      809 

      810 // Return the Handle Type

      811 JNI_LEAF(jobjectRefType, jni_GetObjectRefType(JNIEnv *env, jobject obj))

      812   JNIWrapper("GetObjectRefType");

      813   DTRACE_PROBE2(hotspot_jni, GetObjectRefType__entry, env, obj);

      814   jobjectRefType ret;

      815   if (JNIHandles::is_local_handle(thread, obj) ||

      816       JNIHandles::is_frame_handle(thread, obj))

      817     ret = JNILocalRefType;

      818   else if (JNIHandles::is_global_handle(obj))

      819     ret = JNIGlobalRefType;

      820   else if (JNIHandles::is_weak_global_handle(obj))

      821     ret = JNIWeakGlobalRefType;

      822   else

      823     ret = JNIInvalidRefType;

      824   DTRACE_PROBE1(hotspot_jni, GetObjectRefType__return, ret);

      825   return ret;

      826 JNI_END

      827 

      828 

      829 class JNI_ArgumentPusher : public SignatureIterator {

      830  protected:

      831   JavaCallArguments*  _arguments;

      832 

      833   virtual void get_bool   () = 0;

      834   virtual void get_char   () = 0;

      835   virtual void get_short  () = 0;

      836   virtual void get_byte   () = 0;

      837   virtual void get_int    () = 0;

      838   virtual void get_long   () = 0;

      839   virtual void get_float  () = 0;

      840   virtual void get_double () = 0;

      841   virtual void get_object () = 0;

      842 

      843   JNI_ArgumentPusher(Symbol* signature) : SignatureIterator(signature) {

      844     this->_return_type = T_ILLEGAL;

      845     _arguments = NULL;

      846   }

      847 

      848  public:

      849   virtual void iterate( uint64_t fingerprint ) = 0;

      850 

      851   void set_java_argument_object(JavaCallArguments *arguments) { _arguments = arguments; }

      852 

      853   inline void do_bool()                     { if (!is_return_type()) get_bool();   }

      854   inline void do_char()                     { if (!is_return_type()) get_char();   }

      855   inline void do_short()                    { if (!is_return_type()) get_short();  }

      856   inline void do_byte()                     { if (!is_return_type()) get_byte();   }

      857   inline void do_int()                      { if (!is_return_type()) get_int();    }

      858   inline void do_long()                     { if (!is_return_type()) get_long();   }

      859   inline void do_float()                    { if (!is_return_type()) get_float();  }

      860   inline void do_double()                   { if (!is_return_type()) get_double(); }

      861   inline void do_object(int begin, int end) { if (!is_return_type()) get_object(); }

      862   inline void do_array(int begin, int end)  { if (!is_return_type()) get_object(); } // do_array uses get_object -- there is no get_array

      863   inline void do_void()                     { }

      864 

      865   JavaCallArguments* arguments()     { return _arguments; }

      866   void push_receiver(Handle h)       { _arguments->push_oop(h); }

      867 };

      868 

      869 

      870 class JNI_ArgumentPusherVaArg : public JNI_ArgumentPusher {

      871  protected:

      872   va_list _ap;

      873 

      874   inline void get_bool()   { _arguments->push_int(va_arg(_ap, jint)); } // bool is coerced to int when using va_arg

      875   inline void get_char()   { _arguments->push_int(va_arg(_ap, jint)); } // char is coerced to int when using va_arg

      876   inline void get_short()  { _arguments->push_int(va_arg(_ap, jint)); } // short is coerced to int when using va_arg

      877   inline void get_byte()   { _arguments->push_int(va_arg(_ap, jint)); } // byte is coerced to int when using va_arg

      878   inline void get_int()    { _arguments->push_int(va_arg(_ap, jint)); }

      879 

      880   // each of these paths is exercized by the various jck Call[Static,Nonvirtual,][Void,Int,..]Method[A,V,] tests

      881 

      882   inline void get_long()   { _arguments->push_long(va_arg(_ap, jlong)); }

      883   inline void get_float()  { _arguments->push_float((jfloat)va_arg(_ap, jdouble)); } // float is coerced to double w/ va_arg

      884   inline void get_double() { _arguments->push_double(va_arg(_ap, jdouble)); }

      885   inline void get_object() { jobject l = va_arg(_ap, jobject);

      886                              _arguments->push_oop(Handle((oop *)l, false)); }

      887 

      888   inline void set_ap(va_list rap) {

      889 #ifdef va_copy

      890     va_copy(_ap, rap);

      891 #elif defined (__va_copy)

      892     __va_copy(_ap, rap);

      893 #else

      894     _ap = rap;

      895 #endif

      896   }

      897 

      898  public:

      899   JNI_ArgumentPusherVaArg(Symbol* signature, va_list rap)

      900        : JNI_ArgumentPusher(signature) {

      901     set_ap(rap);

      902   }

      903   JNI_ArgumentPusherVaArg(jmethodID method_id, va_list rap)

      904       : JNI_ArgumentPusher(JNIHandles::resolve_jmethod_id(method_id)->signature()) {

      905     set_ap(rap);

      906   }

      907 

      908   // Optimized path if we have the bitvector form of signature

      909   void iterate( uint64_t fingerprint ) {

      910     if ( fingerprint == UCONST64(-1) ) SignatureIterator::iterate();// Must be too many arguments

      911     else {

      912       _return_type = (BasicType)((fingerprint >> static_feature_size) &

      913                                   result_feature_mask);

      914 

      915       assert(fingerprint, "Fingerprint should not be 0");

      916       fingerprint = fingerprint >> (static_feature_size + result_feature_size);

      917       while ( 1 ) {

      918         switch ( fingerprint & parameter_feature_mask ) {

      919           case bool_parm:

      920           case char_parm:

      921           case short_parm:

      922           case byte_parm:

      923           case int_parm:

      924             get_int();

      925             break;

      926           case obj_parm:

      927             get_object();

      928             break;

      929           case long_parm:

      930             get_long();

      931             break;

      932           case float_parm:

      933             get_float();

      934             break;

      935           case double_parm:

      936             get_double();

      937             break;

      938           case done_parm:

      939             return;

      940             break;

      941           default:

      942             ShouldNotReachHere();

      943             break;

      944         }

      945         fingerprint >>= parameter_feature_size;

      946       }

      947     }

      948   }

      949 };

      950 

      951 

      952 class JNI_ArgumentPusherArray : public JNI_ArgumentPusher {

      953  protected:

      954   const jvalue *_ap;

      955 

      956   inline void get_bool()   { _arguments->push_int((jint)(_ap++)->z); }

      957   inline void get_char()   { _arguments->push_int((jint)(_ap++)->c); }

      958   inline void get_short()  { _arguments->push_int((jint)(_ap++)->s); }

      959   inline void get_byte()   { _arguments->push_int((jint)(_ap++)->b); }

      960   inline void get_int()    { _arguments->push_int((jint)(_ap++)->i); }

      961 

      962   inline void get_long()   { _arguments->push_long((_ap++)->j);  }

      963   inline void get_float()  { _arguments->push_float((_ap++)->f); }

      964   inline void get_double() { _arguments->push_double((_ap++)->d);}

      965   inline void get_object() { _arguments->push_oop(Handle((oop *)(_ap++)->l, false)); }

      966 

      967   inline void set_ap(const jvalue *rap) { _ap = rap; }

      968 

      969  public:

      970   JNI_ArgumentPusherArray(Symbol* signature, const jvalue *rap)

      971        : JNI_ArgumentPusher(signature) {

      972     set_ap(rap);

      973   }

      974   JNI_ArgumentPusherArray(jmethodID method_id, const jvalue *rap)

      975       : JNI_ArgumentPusher(JNIHandles::resolve_jmethod_id(method_id)->signature()) {

      976     set_ap(rap);

      977   }

      978 

      979   // Optimized path if we have the bitvector form of signature

      980   void iterate( uint64_t fingerprint ) {

      981     if ( fingerprint == UCONST64(-1) ) SignatureIterator::iterate(); // Must be too many arguments

      982     else {

      983       _return_type = (BasicType)((fingerprint >> static_feature_size) &

      984                                   result_feature_mask);

      985       assert(fingerprint, "Fingerprint should not be 0");

      986       fingerprint = fingerprint >> (static_feature_size + result_feature_size);

      987       while ( 1 ) {

      988         switch ( fingerprint & parameter_feature_mask ) {

      989           case bool_parm:

      990             get_bool();

      991             break;

      992           case char_parm:

      993             get_char();

      994             break;

      995           case short_parm:

      996             get_short();

      997             break;

      998           case byte_parm:

      999             get_byte();

     1000             break;

     1001           case int_parm:

     1002             get_int();

     1003             break;

     1004           case obj_parm:

     1005             get_object();

     1006             break;

     1007           case long_parm:

     1008             get_long();

     1009             break;

     1010           case float_parm:

     1011             get_float();

     1012             break;

     1013           case double_parm:

     1014             get_double();

     1015             break;

     1016           case done_parm:

     1017             return;

     1018             break;

     1019           default:

     1020             ShouldNotReachHere();

     1021             break;

     1022         }

     1023         fingerprint >>= parameter_feature_size;

     1024       }

     1025     }

     1026   }

     1027 };

     1028 

     1029 

     1030 enum JNICallType {

     1031   JNI_STATIC,

     1032   JNI_VIRTUAL,

     1033   JNI_NONVIRTUAL

     1034 };

     1035 

     1036 static methodHandle jni_resolve_interface_call(Handle recv, methodHandle method, TRAPS) {

     1037   assert(!method.is_null() , "method should not be null");

     1038 

     1039   KlassHandle recv_klass; // Default to NULL (use of ?: can confuse gcc)

     1040   if (recv.not_null()) recv_klass = KlassHandle(THREAD, recv->klass());

     1041   KlassHandle spec_klass (THREAD, method->method_holder());

     1042   Symbol*  name  = method->name();

     1043   Symbol*  signature  = method->signature();

     1044   CallInfo info;

     1045   LinkResolver::resolve_interface_call(info, recv, recv_klass,  spec_klass, name, signature, KlassHandle(), false, true, CHECK_(methodHandle()));

     1046   return info.selected_method();

     1047 }

     1048 

     1049 static methodHandle jni_resolve_virtual_call(Handle recv, methodHandle method, TRAPS) {

     1050   assert(!method.is_null() , "method should not be null");

     1051 

     1052   KlassHandle recv_klass; // Default to NULL (use of ?: can confuse gcc)

     1053   if (recv.not_null()) recv_klass = KlassHandle(THREAD, recv->klass());

     1054   KlassHandle spec_klass (THREAD, method->method_holder());

     1055   Symbol*  name  = method->name();

     1056   Symbol*  signature  = method->signature();

     1057   CallInfo info;

     1058   LinkResolver::resolve_virtual_call(info, recv, recv_klass,  spec_klass, name, signature, KlassHandle(), false, true, CHECK_(methodHandle()));

     1059   return info.selected_method();

     1060 }

     1061 

     1062 

     1063 

     1064 static void jni_invoke_static(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) {

     1065   methodHandle method(THREAD, JNIHandles::resolve_jmethod_id(method_id));

     1066 

     1067   // Create object to hold arguments for the JavaCall, and associate it with

     1068   // the jni parser

     1069   ResourceMark rm(THREAD);

     1070   int number_of_parameters = method->size_of_parameters();

     1071   JavaCallArguments java_args(number_of_parameters);

     1072   args->set_java_argument_object(&java_args);

     1073 

     1074   assert(method->is_static(), "method should be static");

     1075 

     1076   // Fill out JavaCallArguments object

     1077   args->iterate( Fingerprinter(method).fingerprint() );

     1078   // Initialize result type

     1079   result->set_type(args->get_ret_type());

     1080 

     1081   // Invoke the method. Result is returned as oop.

     1082   JavaCalls::call(result, method, &java_args, CHECK);

     1083 

     1084   // Convert result

     1085   if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY) {

     1086     result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject()));

     1087   }

     1088 }

     1089 

     1090 

     1091 static void jni_invoke_nonstatic(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) {

     1092   oop recv = JNIHandles::resolve(receiver);

     1093   if (recv == NULL) {

     1094     THROW(vmSymbols::java_lang_NullPointerException());

     1095   }

     1096   Handle h_recv(THREAD, recv);

     1097 

     1098   int number_of_parameters;

     1099   methodOop selected_method;

     1100   {

     1101     methodOop m = JNIHandles::resolve_jmethod_id(method_id);

     1102     number_of_parameters = m->size_of_parameters();

     1103     klassOop holder = m->method_holder();

     1104     if (!(Klass::cast(holder))->is_interface()) {

     1105       // non-interface call -- for that little speed boost, don't handlize

     1106       debug_only(No_Safepoint_Verifier nosafepoint;)

     1107       if (call_type == JNI_VIRTUAL) {

     1108         // jni_GetMethodID makes sure class is linked and initialized

     1109         // so m should have a valid vtable index.

     1110         int vtbl_index = m->vtable_index();

     1111         if (vtbl_index != methodOopDesc::nonvirtual_vtable_index) {

     1112           klassOop k = h_recv->klass();

     1113           // k might be an arrayKlassOop but all vtables start at

     1114           // the same place. The cast is to avoid virtual call and assertion.

     1115           instanceKlass *ik = (instanceKlass*)k->klass_part();

     1116           selected_method = ik->method_at_vtable(vtbl_index);

     1117         } else {

     1118           // final method

     1119           selected_method = m;

     1120         }

     1121       } else {

     1122         // JNI_NONVIRTUAL call

     1123         selected_method = m;

     1124       }

     1125     } else {

     1126       // interface call

     1127       KlassHandle h_holder(THREAD, holder);

     1128 

     1129       int itbl_index = m->cached_itable_index();

     1130       if (itbl_index == -1) {

     1131         itbl_index = klassItable::compute_itable_index(m);

     1132         m->set_cached_itable_index(itbl_index);

     1133         // the above may have grabbed a lock, 'm' and anything non-handlized can't be used again

     1134       }

     1135       klassOop k = h_recv->klass();

     1136       selected_method = instanceKlass::cast(k)->method_at_itable(h_holder(), itbl_index, CHECK);

     1137     }

     1138   }

     1139 

     1140   methodHandle method(THREAD, selected_method);

     1141 

     1142   // Create object to hold arguments for the JavaCall, and associate it with

     1143   // the jni parser

     1144   ResourceMark rm(THREAD);

     1145   JavaCallArguments java_args(number_of_parameters);

     1146   args->set_java_argument_object(&java_args);

     1147 

     1148   // handle arguments

     1149   assert(!method->is_static(), "method should not be static");

     1150   args->push_receiver(h_recv); // Push jobject handle

     1151 

     1152   // Fill out JavaCallArguments object

     1153   args->iterate( Fingerprinter(method).fingerprint() );

     1154   // Initialize result type

     1155   result->set_type(args->get_ret_type());

     1156 

     1157   // Invoke the method. Result is returned as oop.

     1158   JavaCalls::call(result, method, &java_args, CHECK);

     1159 

     1160   // Convert result

     1161   if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY) {

     1162     result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject()));

     1163   }

     1164 }

     1165 

     1166 

     1167 static instanceOop alloc_object(jclass clazz, TRAPS) {

     1168   KlassHandle k(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(clazz)));

     1169   Klass::cast(k())->check_valid_for_instantiation(false, CHECK_NULL);

     1170   instanceKlass::cast(k())->initialize(CHECK_NULL);

     1171   instanceOop ih = instanceKlass::cast(k())->allocate_instance(THREAD);

     1172   return ih;

     1173 }

     1174 

     1175 DT_RETURN_MARK_DECL(AllocObject, jobject);

     1176 

     1177 JNI_ENTRY(jobject, jni_AllocObject(JNIEnv *env, jclass clazz))

     1178   JNIWrapper("AllocObject");

     1179 

     1180   DTRACE_PROBE2(hotspot_jni, AllocObject__entry, env, clazz);

     1181   jobject ret = NULL;

     1182   DT_RETURN_MARK(AllocObject, jobject, (const jobject&)ret);

     1183 

     1184   instanceOop i = alloc_object(clazz, CHECK_NULL);

     1185   ret = JNIHandles::make_local(env, i);

     1186   return ret;

     1187 JNI_END

     1188 

     1189 DT_RETURN_MARK_DECL(NewObjectA, jobject);

     1190 

     1191 JNI_ENTRY(jobject, jni_NewObjectA(JNIEnv *env, jclass clazz, jmethodID methodID, const jvalue *args))

     1192   JNIWrapper("NewObjectA");

     1193   DTRACE_PROBE3(hotspot_jni, NewObjectA__entry, env, clazz, methodID);

     1194   jobject obj = NULL;

     1195   DT_RETURN_MARK(NewObjectA, jobject, (const jobject)obj);

     1196 

     1197   instanceOop i = alloc_object(clazz, CHECK_NULL);

     1198   obj = JNIHandles::make_local(env, i);

     1199   JavaValue jvalue(T_VOID);

     1200   JNI_ArgumentPusherArray ap(methodID, args);

     1201   jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);

     1202   return obj;

     1203 JNI_END

     1204 

     1205 DT_RETURN_MARK_DECL(NewObjectV, jobject);

     1206 

     1207 JNI_ENTRY(jobject, jni_NewObjectV(JNIEnv *env, jclass clazz, jmethodID methodID, va_list args))

     1208   JNIWrapper("NewObjectV");

     1209   DTRACE_PROBE3(hotspot_jni, NewObjectV__entry, env, clazz, methodID);

     1210   jobject obj = NULL;

     1211   DT_RETURN_MARK(NewObjectV, jobject, (const jobject&)obj);

     1212 

     1213   instanceOop i = alloc_object(clazz, CHECK_NULL);

     1214   obj = JNIHandles::make_local(env, i);

     1215   JavaValue jvalue(T_VOID);

     1216   JNI_ArgumentPusherVaArg ap(methodID, args);

     1217   jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);

     1218   return obj;

     1219 JNI_END

     1220 

     1221 DT_RETURN_MARK_DECL(NewObject, jobject);

     1222 

     1223 JNI_ENTRY(jobject, jni_NewObject(JNIEnv *env, jclass clazz, jmethodID methodID, ...))

     1224   JNIWrapper("NewObject");

     1225   DTRACE_PROBE3(hotspot_jni, NewObject__entry, env, clazz, methodID);

     1226   jobject obj = NULL;

     1227   DT_RETURN_MARK(NewObject, jobject, (const jobject&)obj);

     1228 

     1229   instanceOop i = alloc_object(clazz, CHECK_NULL);

     1230   obj = JNIHandles::make_local(env, i);

     1231   va_list args;

     1232   va_start(args, methodID);

     1233   JavaValue jvalue(T_VOID);

     1234   JNI_ArgumentPusherVaArg ap(methodID, args);

     1235   jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);

     1236   va_end(args);

     1237   return obj;

     1238 JNI_END

     1239 

     1240 

     1241 JNI_ENTRY(jclass, jni_GetObjectClass(JNIEnv *env, jobject obj))

     1242   JNIWrapper("GetObjectClass");

     1243   DTRACE_PROBE2(hotspot_jni, GetObjectClass__entry, env, obj);

     1244   klassOop k = JNIHandles::resolve_non_null(obj)->klass();

     1245   jclass ret =

     1246     (jclass) JNIHandles::make_local(env, Klass::cast(k)->java_mirror());

     1247   DTRACE_PROBE1(hotspot_jni, GetObjectClass__return, ret);

     1248   return ret;

     1249 JNI_END

     1250 

     1251 JNI_QUICK_ENTRY(jboolean, jni_IsInstanceOf(JNIEnv *env, jobject obj, jclass clazz))

     1252   JNIWrapper("IsInstanceOf");

     1253   DTRACE_PROBE3(hotspot_jni, IsInstanceOf__entry, env, obj, clazz);

     1254   jboolean ret = JNI_TRUE;

     1255   if (obj != NULL) {

     1256     ret = JNI_FALSE;

     1257     klassOop k = java_lang_Class::as_klassOop(

     1258       JNIHandles::resolve_non_null(clazz));

     1259     if (k != NULL) {

     1260       ret = JNIHandles::resolve_non_null(obj)->is_a(k) ? JNI_TRUE : JNI_FALSE;

     1261     }

     1262   }

     1263   DTRACE_PROBE1(hotspot_jni, IsInstanceOf__return, ret);

     1264   return ret;

     1265 JNI_END

     1266 

     1267 

     1268 static jmethodID get_method_id(JNIEnv *env, jclass clazz, const char *name_str,

     1269                                const char *sig, bool is_static, TRAPS) {

     1270   // %%%% This code should probably just call into a method in the LinkResolver

     1271   //

     1272   // The class should have been loaded (we have an instance of the class

     1273   // passed in) so the method and signature should already be in the symbol

     1274   // table.  If they're not there, the method doesn't exist.

     1275   const char *name_to_probe = (name_str == NULL)

     1276                         ? vmSymbols::object_initializer_name()->as_C_string()

     1277                         : name_str;

     1278   TempNewSymbol name = SymbolTable::probe(name_to_probe, (int)strlen(name_to_probe));

     1279   TempNewSymbol signature = SymbolTable::probe(sig, (int)strlen(sig));

     1280 

     1281   if (name == NULL || signature == NULL) {

     1282     THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str);

     1283   }

     1284 

     1285   // Throw a NoSuchMethodError exception if we have an instance of a

     1286   // primitive java.lang.Class

     1287   if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(clazz))) {

     1288     THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str);

     1289   }

     1290 

     1291   KlassHandle klass(THREAD,

     1292                java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(clazz)));

     1293 

     1294   // Make sure class is linked and initialized before handing id's out to

     1295   // methodOops.

     1296   Klass::cast(klass())->initialize(CHECK_NULL);

     1297 

     1298   methodOop m;

     1299   if (name == vmSymbols::object_initializer_name() ||

     1300       name == vmSymbols::class_initializer_name()) {

     1301     // Never search superclasses for constructors

     1302     if (klass->oop_is_instance()) {

     1303       m = instanceKlass::cast(klass())->find_method(name, signature);

     1304     } else {

     1305       m = NULL;

     1306     }

     1307   } else {

     1308     m = klass->lookup_method(name, signature);

     1309     // Look up interfaces

     1310     if (m == NULL && klass->oop_is_instance()) {

     1311       m = instanceKlass::cast(klass())->lookup_method_in_all_interfaces(name,

     1312                                                                    signature);

     1313     }

     1314   }

     1315   if (m == NULL || (m->is_static() != is_static)) {

     1316     THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str);

     1317   }

     1318   return m->jmethod_id();

     1319 }

     1320 

     1321 

     1322 JNI_ENTRY(jmethodID, jni_GetMethodID(JNIEnv *env, jclass clazz,

     1323           const char *name, const char *sig))

     1324   JNIWrapper("GetMethodID");

     1325   DTRACE_PROBE4(hotspot_jni, GetMethodID__entry, env, clazz, name, sig);

     1326   jmethodID ret = get_method_id(env, clazz, name, sig, false, thread);

     1327   DTRACE_PROBE1(hotspot_jni, GetMethodID__return, ret);

     1328   return ret;

     1329 JNI_END

     1330 

     1331 

     1332 JNI_ENTRY(jmethodID, jni_GetStaticMethodID(JNIEnv *env, jclass clazz,

     1333           const char *name, const char *sig))

     1334   JNIWrapper("GetStaticMethodID");

     1335   DTRACE_PROBE4(hotspot_jni, GetStaticMethodID__entry, env, clazz, name, sig);

     1336   jmethodID ret = get_method_id(env, clazz, name, sig, true, thread);

     1337   DTRACE_PROBE1(hotspot_jni, GetStaticMethodID__return, ret);

     1338   return ret;

     1339 JNI_END

     1340 

     1341 

     1342 

     1343 //

     1344 // Calling Methods

     1345 //

     1346 

     1347 

     1348 #define DEFINE_CALLMETHOD(ResultType, Result, Tag) \

     1349 \

     1350   DT_RETURN_MARK_DECL_FOR(Result, Call##Result##Method, ResultType);\

     1351   DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodV, ResultType);\

     1352   DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodA, ResultType);\

     1353 \

     1354 JNI_ENTRY(ResultType, \

     1355           jni_Call##Result##Method(JNIEnv *env, jobject obj, jmethodID methodID, ...)) \

     1356   JNIWrapper("Call" XSTR(Result) "Method"); \

     1357 \

     1358   DTRACE_PROBE3(hotspot_jni, Call##Result##Method__entry, env, obj, methodID);\

     1359   ResultType ret = 0;\

     1360   DT_RETURN_MARK_FOR(Result, Call##Result##Method, ResultType, \

     1361                      (const ResultType&)ret);\

     1362 \

     1363   va_list args; \

     1364   va_start(args, methodID); \

     1365   JavaValue jvalue(Tag); \

     1366   JNI_ArgumentPusherVaArg ap(methodID, args); \

     1367   jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \

     1368   va_end(args); \

     1369   ret = jvalue.get_##ResultType(); \

     1370   return ret;\

     1371 JNI_END \

     1372 \

     1373 \

     1374 JNI_ENTRY(ResultType, \

     1375           jni_Call##Result##MethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) \

     1376   JNIWrapper("Call" XSTR(Result) "MethodV"); \

     1377 \

     1378   DTRACE_PROBE3(hotspot_jni, Call##Result##MethodV__entry, env, obj, methodID);\

     1379   ResultType ret = 0;\

     1380   DT_RETURN_MARK_FOR(Result, Call##Result##MethodV, ResultType, \

     1381                      (const ResultType&)ret);\

     1382 \

     1383   JavaValue jvalue(Tag); \

     1384   JNI_ArgumentPusherVaArg ap(methodID, args); \

     1385   jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \

     1386   ret = jvalue.get_##ResultType(); \

     1387   return ret;\

     1388 JNI_END \

     1389 \

     1390 \

     1391 JNI_ENTRY(ResultType, \

     1392           jni_Call##Result##MethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) \

     1393   JNIWrapper("Call" XSTR(Result) "MethodA"); \

     1394   DTRACE_PROBE3(hotspot_jni, Call##Result##MethodA__entry, env, obj, methodID);\

     1395   ResultType ret = 0;\

     1396   DT_RETURN_MARK_FOR(Result, Call##Result##MethodA, ResultType, \

     1397                      (const ResultType&)ret);\

     1398 \

     1399   JavaValue jvalue(Tag); \

     1400   JNI_ArgumentPusherArray ap(methodID, args); \

     1401   jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \

     1402   ret = jvalue.get_##ResultType(); \

     1403   return ret;\

     1404 JNI_END

     1405 

     1406 // the runtime type of subword integral basic types is integer

     1407 DEFINE_CALLMETHOD(jboolean, Boolean, T_BOOLEAN)

     1408 DEFINE_CALLMETHOD(jbyte,    Byte,    T_BYTE)

     1409 DEFINE_CALLMETHOD(jchar,    Char,    T_CHAR)

     1410 DEFINE_CALLMETHOD(jshort,   Short,   T_SHORT)

     1411 

     1412 DEFINE_CALLMETHOD(jobject,  Object,  T_OBJECT)

     1413 DEFINE_CALLMETHOD(jint,     Int,     T_INT)

     1414 DEFINE_CALLMETHOD(jlong,    Long,    T_LONG)

     1415 DEFINE_CALLMETHOD(jfloat,   Float,   T_FLOAT)

     1416 DEFINE_CALLMETHOD(jdouble,  Double,  T_DOUBLE)

     1417 

     1418 DT_VOID_RETURN_MARK_DECL(CallVoidMethod);

     1419 DT_VOID_RETURN_MARK_DECL(CallVoidMethodV);

     1420 DT_VOID_RETURN_MARK_DECL(CallVoidMethodA);

     1421 

     1422 JNI_ENTRY(void, jni_CallVoidMethod(JNIEnv *env, jobject obj, jmethodID methodID, ...))

     1423   JNIWrapper("CallVoidMethod");

     1424   DTRACE_PROBE3(hotspot_jni, CallVoidMethod__entry, env, obj, methodID);

     1425   DT_VOID_RETURN_MARK(CallVoidMethod);

     1426 

     1427   va_list args;

     1428   va_start(args, methodID);

     1429   JavaValue jvalue(T_VOID);

     1430   JNI_ArgumentPusherVaArg ap(methodID, args);

     1431   jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);

     1432   va_end(args);

     1433 JNI_END

     1434 

     1435 

     1436 JNI_ENTRY(void, jni_CallVoidMethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args))

     1437   JNIWrapper("CallVoidMethodV");

     1438   DTRACE_PROBE3(hotspot_jni, CallVoidMethodV__entry, env, obj, methodID);

     1439   DT_VOID_RETURN_MARK(CallVoidMethodV);

     1440 

     1441   JavaValue jvalue(T_VOID);

     1442   JNI_ArgumentPusherVaArg ap(methodID, args);

     1443   jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);

     1444 JNI_END

     1445 

     1446 

     1447 JNI_ENTRY(void, jni_CallVoidMethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args))

     1448   JNIWrapper("CallVoidMethodA");

     1449   DTRACE_PROBE3(hotspot_jni, CallVoidMethodA__entry, env, obj, methodID);

     1450   DT_VOID_RETURN_MARK(CallVoidMethodA);

     1451 

     1452   JavaValue jvalue(T_VOID);

     1453   JNI_ArgumentPusherArray ap(methodID, args);

     1454   jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);

     1455 JNI_END

     1456 

     1457 

     1458 #define DEFINE_CALLNONVIRTUALMETHOD(ResultType, Result, Tag) \

     1459 \

     1460   DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##Method, ResultType);\

     1461   DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodV, ResultType);\

     1462   DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodA, ResultType);\

     1463 \

     1464 JNI_ENTRY(ResultType, \

     1465           jni_CallNonvirtual##Result##Method(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) \

     1466   JNIWrapper("CallNonvitual" XSTR(Result) "Method"); \

     1467 \

     1468   DTRACE_PROBE4(hotspot_jni, CallNonvirtual##Result##Method__entry, env, obj, cls, methodID);\

     1469   ResultType ret;\

     1470   DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##Method, ResultType, \

     1471                      (const ResultType&)ret);\

     1472 \

     1473   va_list args; \

     1474   va_start(args, methodID); \

     1475   JavaValue jvalue(Tag); \

     1476   JNI_ArgumentPusherVaArg ap(methodID, args); \

     1477   jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \

     1478   va_end(args); \

     1479   ret = jvalue.get_##ResultType(); \

     1480   return ret;\

     1481 JNI_END \

     1482 \

     1483 JNI_ENTRY(ResultType, \

     1484           jni_CallNonvirtual##Result##MethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) \

     1485   JNIWrapper("CallNonvitual" XSTR(Result) "#MethodV"); \

     1486   DTRACE_PROBE4(hotspot_jni, CallNonvirtual##Result##MethodV__entry, env, obj, cls, methodID);\

     1487   ResultType ret;\

     1488   DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodV, ResultType, \

     1489                      (const ResultType&)ret);\

     1490 \

     1491   JavaValue jvalue(Tag); \

     1492   JNI_ArgumentPusherVaArg ap(methodID, args); \

     1493   jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \

     1494   ret = jvalue.get_##ResultType(); \

     1495   return ret;\

     1496 JNI_END \

     1497 \

     1498 JNI_ENTRY(ResultType, \

     1499           jni_CallNonvirtual##Result##MethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) \

     1500   JNIWrapper("CallNonvitual" XSTR(Result) "MethodA"); \

     1501   DTRACE_PROBE4(hotspot_jni, CallNonvirtual##Result##MethodA__entry, env, obj, cls, methodID);\

     1502   ResultType ret;\

     1503   DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodA, ResultType, \

     1504                      (const ResultType&)ret);\

     1505 \

     1506   JavaValue jvalue(Tag); \

     1507   JNI_ArgumentPusherArray ap(methodID, args); \

     1508   jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \

     1509   ret = jvalue.get_##ResultType(); \

     1510   return ret;\

     1511 JNI_END

     1512 

     1513 // the runtime type of subword integral basic types is integer

     1514 DEFINE_CALLNONVIRTUALMETHOD(jboolean, Boolean, T_BOOLEAN)

     1515 DEFINE_CALLNONVIRTUALMETHOD(jbyte,    Byte,    T_BYTE)

     1516 DEFINE_CALLNONVIRTUALMETHOD(jchar,    Char,    T_CHAR)

     1517 DEFINE_CALLNONVIRTUALMETHOD(jshort,   Short,   T_SHORT)

     1518 

     1519 DEFINE_CALLNONVIRTUALMETHOD(jobject,  Object,  T_OBJECT)

     1520 DEFINE_CALLNONVIRTUALMETHOD(jint,     Int,     T_INT)

     1521 DEFINE_CALLNONVIRTUALMETHOD(jlong,    Long,    T_LONG)

     1522 DEFINE_CALLNONVIRTUALMETHOD(jfloat,   Float,   T_FLOAT)

     1523 DEFINE_CALLNONVIRTUALMETHOD(jdouble,  Double,  T_DOUBLE)

     1524 

     1525 

     1526 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethod);

     1527 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodV);

     1528 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodA);

     1529 

     1530 JNI_ENTRY(void, jni_CallNonvirtualVoidMethod(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...))

     1531   JNIWrapper("CallNonvirtualVoidMethod");

     1532 

     1533   DTRACE_PROBE4(hotspot_jni, CallNonvirtualVoidMethod__entry,

     1534                env, obj, cls, methodID);

     1535   DT_VOID_RETURN_MARK(CallNonvirtualVoidMethod);

     1536 

     1537   va_list args;

     1538   va_start(args, methodID);

     1539   JavaValue jvalue(T_VOID);

     1540   JNI_ArgumentPusherVaArg ap(methodID, args);

     1541   jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);

     1542   va_end(args);

     1543 JNI_END

     1544 

     1545 

     1546 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args))

     1547   JNIWrapper("CallNonvirtualVoidMethodV");

     1548 

     1549   DTRACE_PROBE4(hotspot_jni, CallNonvirtualVoidMethodV__entry,

     1550                env, obj, cls, methodID);

     1551   DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodV);

     1552 

     1553   JavaValue jvalue(T_VOID);

     1554   JNI_ArgumentPusherVaArg ap(methodID, args);

     1555   jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);

     1556 JNI_END

     1557 

     1558 

     1559 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args))

     1560   JNIWrapper("CallNonvirtualVoidMethodA");

     1561   DTRACE_PROBE4(hotspot_jni, CallNonvirtualVoidMethodA__entry,

     1562                 env, obj, cls, methodID);

     1563   DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodA);

     1564   JavaValue jvalue(T_VOID);

     1565   JNI_ArgumentPusherArray ap(methodID, args);

     1566   jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);

     1567 JNI_END

     1568 

     1569 

     1570 #define DEFINE_CALLSTATICMETHOD(ResultType, Result, Tag) \

     1571 \

     1572   DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##Method, ResultType);\

     1573   DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodV, ResultType);\

     1574   DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodA, ResultType);\

     1575 \

     1576 JNI_ENTRY(ResultType, \

     1577           jni_CallStatic##Result##Method(JNIEnv *env, jclass cls, jmethodID methodID, ...)) \

     1578   JNIWrapper("CallStatic" XSTR(Result) "Method"); \

     1579 \

     1580   DTRACE_PROBE3(hotspot_jni, CallStatic##Result##Method__entry, env, cls, methodID);\

     1581   ResultType ret = 0;\

     1582   DT_RETURN_MARK_FOR(Result, CallStatic##Result##Method, ResultType, \

     1583                      (const ResultType&)ret);\

     1584 \

     1585   va_list args; \

     1586   va_start(args, methodID); \

     1587   JavaValue jvalue(Tag); \

     1588   JNI_ArgumentPusherVaArg ap(methodID, args); \

     1589   jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \

     1590   va_end(args); \

     1591   ret = jvalue.get_##ResultType(); \

     1592   return ret;\

     1593 JNI_END \

     1594 \

     1595 JNI_ENTRY(ResultType, \

     1596           jni_CallStatic##Result##MethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) \

     1597   JNIWrapper("CallStatic" XSTR(Result) "MethodV"); \

     1598   DTRACE_PROBE3(hotspot_jni, CallStatic##Result##MethodV__entry, env, cls, methodID);\

     1599   ResultType ret = 0;\

     1600   DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodV, ResultType, \

     1601                      (const ResultType&)ret);\

     1602 \

     1603   JavaValue jvalue(Tag); \

     1604   JNI_ArgumentPusherVaArg ap(methodID, args); \

     1605   jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \

     1606   ret = jvalue.get_##ResultType(); \

     1607   return ret;\

     1608 JNI_END \

     1609 \

     1610 JNI_ENTRY(ResultType, \

     1611           jni_CallStatic##Result##MethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) \

     1612   JNIWrapper("CallStatic" XSTR(Result) "MethodA"); \

     1613   DTRACE_PROBE3(hotspot_jni, CallStatic##Result##MethodA__entry, env, cls, methodID);\

     1614   ResultType ret = 0;\

     1615   DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodA, ResultType, \

     1616                      (const ResultType&)ret);\

     1617 \

     1618   JavaValue jvalue(Tag); \

     1619   JNI_ArgumentPusherArray ap(methodID, args); \

     1620   jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \

     1621   ret = jvalue.get_##ResultType(); \

     1622   return ret;\

     1623 JNI_END

     1624 

     1625 // the runtime type of subword integral basic types is integer

     1626 DEFINE_CALLSTATICMETHOD(jboolean, Boolean, T_BOOLEAN)

     1627 DEFINE_CALLSTATICMETHOD(jbyte,    Byte,    T_BYTE)

     1628 DEFINE_CALLSTATICMETHOD(jchar,    Char,    T_CHAR)

     1629 DEFINE_CALLSTATICMETHOD(jshort,   Short,   T_SHORT)

     1630 

     1631 DEFINE_CALLSTATICMETHOD(jobject,  Object,  T_OBJECT)

     1632 DEFINE_CALLSTATICMETHOD(jint,     Int,     T_INT)

     1633 DEFINE_CALLSTATICMETHOD(jlong,    Long,    T_LONG)

     1634 DEFINE_CALLSTATICMETHOD(jfloat,   Float,   T_FLOAT)

     1635 DEFINE_CALLSTATICMETHOD(jdouble,  Double,  T_DOUBLE)

     1636 

     1637 

     1638 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethod);

     1639 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodV);

     1640 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodA);

     1641 

     1642 JNI_ENTRY(void, jni_CallStaticVoidMethod(JNIEnv *env, jclass cls, jmethodID methodID, ...))

     1643   JNIWrapper("CallStaticVoidMethod");

     1644   DTRACE_PROBE3(hotspot_jni, CallStaticVoidMethod__entry, env, cls, methodID);

     1645   DT_VOID_RETURN_MARK(CallStaticVoidMethod);

     1646 

     1647   va_list args;

     1648   va_start(args, methodID);

     1649   JavaValue jvalue(T_VOID);

     1650   JNI_ArgumentPusherVaArg ap(methodID, args);

     1651   jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);

     1652   va_end(args);

     1653 JNI_END

     1654 

     1655 

     1656 JNI_ENTRY(void, jni_CallStaticVoidMethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args))

     1657   JNIWrapper("CallStaticVoidMethodV");

     1658   DTRACE_PROBE3(hotspot_jni, CallStaticVoidMethodV__entry, env, cls, methodID);

     1659   DT_VOID_RETURN_MARK(CallStaticVoidMethodV);

     1660 

     1661   JavaValue jvalue(T_VOID);

     1662   JNI_ArgumentPusherVaArg ap(methodID, args);

     1663   jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);

     1664 JNI_END

     1665 

     1666 

     1667 JNI_ENTRY(void, jni_CallStaticVoidMethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args))

     1668   JNIWrapper("CallStaticVoidMethodA");

     1669   DTRACE_PROBE3(hotspot_jni, CallStaticVoidMethodA__entry, env, cls, methodID);

     1670   DT_VOID_RETURN_MARK(CallStaticVoidMethodA);

     1671 

     1672   JavaValue jvalue(T_VOID);

     1673   JNI_ArgumentPusherArray ap(methodID, args);

     1674   jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);

     1675 JNI_END

     1676 

     1677 

     1678 //

     1679 // Accessing Fields

     1680 //

     1681 

     1682 

     1683 DT_RETURN_MARK_DECL(GetFieldID, jfieldID);

     1684 

     1685 JNI_ENTRY(jfieldID, jni_GetFieldID(JNIEnv *env, jclass clazz,

     1686           const char *name, const char *sig))

     1687   JNIWrapper("GetFieldID");

     1688   DTRACE_PROBE4(hotspot_jni, GetFieldID__entry, env, clazz, name, sig);

     1689   jfieldID ret = 0;

     1690   DT_RETURN_MARK(GetFieldID, jfieldID, (const jfieldID&)ret);

     1691 

     1692   // The class should have been loaded (we have an instance of the class

     1693   // passed in) so the field and signature should already be in the symbol

     1694   // table.  If they're not there, the field doesn't exist.

     1695   TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name));

     1696   TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig));

     1697   if (fieldname == NULL || signame == NULL) {

     1698     THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);

     1699   }

     1700   KlassHandle k(THREAD,

     1701                 java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(clazz)));

     1702   // Make sure class is initialized before handing id's out to fields

     1703   Klass::cast(k())->initialize(CHECK_NULL);

     1704 

     1705   fieldDescriptor fd;

     1706   if (!Klass::cast(k())->oop_is_instance() ||

     1707       !instanceKlass::cast(k())->find_field(fieldname, signame, false, &fd)) {

     1708     THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);

     1709   }

     1710 

     1711   // A jfieldID for a non-static field is simply the offset of the field within the instanceOop

     1712   // It may also have hash bits for k, if VerifyJNIFields is turned on.

     1713   ret = jfieldIDWorkaround::to_instance_jfieldID(k(), fd.offset());

     1714   return ret;

     1715 JNI_END

     1716 

     1717 

     1718 JNI_ENTRY(jobject, jni_GetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID))

     1719   JNIWrapper("GetObjectField");

     1720   DTRACE_PROBE3(hotspot_jni, GetObjectField__entry, env, obj, fieldID);

     1721   oop o = JNIHandles::resolve_non_null(obj);

     1722   klassOop k = o->klass();

     1723   int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);

     1724   // Keep JVMTI addition small and only check enabled flag here.

     1725   // jni_GetField_probe() assumes that is okay to create handles.

     1726   if (JvmtiExport::should_post_field_access()) {

     1727     o = JvmtiExport::jni_GetField_probe(thread, obj, o, k, fieldID, false);

     1728   }

     1729   jobject ret = JNIHandles::make_local(env, o->obj_field(offset));

     1730 #ifndef SERIALGC

     1731   // If G1 is enabled and we are accessing the value of the referent

     1732   // field in a reference object then we need to register a non-null

     1733   // referent with the SATB barrier.

     1734   if (UseG1GC) {

     1735     bool needs_barrier = false;

     1736 

     1737     if (ret != NULL &&

     1738         offset == java_lang_ref_Reference::referent_offset &&

     1739         instanceKlass::cast(k)->reference_type() != REF_NONE) {

     1740       assert(instanceKlass::cast(k)->is_subclass_of(SystemDictionary::Reference_klass()), "sanity");

     1741       needs_barrier = true;

     1742     }

     1743 

     1744     if (needs_barrier) {

     1745       oop referent = JNIHandles::resolve(ret);

     1746       G1SATBCardTableModRefBS::enqueue(referent);

     1747     }

     1748   }

     1749 #endif // SERIALGC

     1750   DTRACE_PROBE1(hotspot_jni, GetObjectField__return, ret);

     1751   return ret;

     1752 JNI_END

     1753 

     1754 

     1755 #define DEFINE_GETFIELD(Return,Fieldname,Result) \

     1756 \

     1757   DT_RETURN_MARK_DECL_FOR(Result, Get##Result##Field, Return);\

     1758 \

     1759 JNI_QUICK_ENTRY(Return, jni_Get##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID)) \

     1760   JNIWrapper("Get" XSTR(Result) "Field"); \

     1761 \

     1762   DTRACE_PROBE3(hotspot_jni, Get##Result##Field__entry, env, obj, fieldID);\

     1763   Return ret = 0;\

     1764   DT_RETURN_MARK_FOR(Result, Get##Result##Field, Return, (const Return&)ret);\

     1765 \

     1766   oop o = JNIHandles::resolve_non_null(obj); \

     1767   klassOop k = o->klass(); \

     1768   int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);  \

     1769   /* Keep JVMTI addition small and only check enabled flag here.       */ \

     1770   /* jni_GetField_probe_nh() assumes that is not okay to create handles */ \

     1771   /* and creates a ResetNoHandleMark.                                   */ \

     1772   if (JvmtiExport::should_post_field_access()) { \

     1773     o = JvmtiExport::jni_GetField_probe_nh(thread, obj, o, k, fieldID, false); \

     1774   } \

     1775   ret = o->Fieldname##_field(offset); \

     1776   return ret; \

     1777 JNI_END

     1778 

     1779 DEFINE_GETFIELD(jboolean, bool,   Boolean)

     1780 DEFINE_GETFIELD(jbyte,    byte,   Byte)

     1781 DEFINE_GETFIELD(jchar,    char,   Char)

     1782 DEFINE_GETFIELD(jshort,   short,  Short)

     1783 DEFINE_GETFIELD(jint,     int,    Int)

     1784 DEFINE_GETFIELD(jlong,    long,   Long)

     1785 DEFINE_GETFIELD(jfloat,   float,  Float)

     1786 DEFINE_GETFIELD(jdouble,  double, Double)

     1787 

     1788 address jni_GetBooleanField_addr() {

     1789   return (address)jni_GetBooleanField;

     1790 }

     1791 address jni_GetByteField_addr() {

     1792   return (address)jni_GetByteField;

     1793 }

     1794 address jni_GetCharField_addr() {

     1795   return (address)jni_GetCharField;

     1796 }

     1797 address jni_GetShortField_addr() {

     1798   return (address)jni_GetShortField;

     1799 }

     1800 address jni_GetIntField_addr() {

     1801   return (address)jni_GetIntField;

     1802 }

     1803 address jni_GetLongField_addr() {

     1804   return (address)jni_GetLongField;

     1805 }

     1806 address jni_GetFloatField_addr() {

     1807   return (address)jni_GetFloatField;

     1808 }

     1809 address jni_GetDoubleField_addr() {

     1810   return (address)jni_GetDoubleField;

     1811 }

     1812 

     1813 JNI_QUICK_ENTRY(void, jni_SetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID, jobject value))

     1814   JNIWrapper("SetObjectField");

     1815   DTRACE_PROBE4(hotspot_jni, SetObjectField__entry, env, obj, fieldID, value);

     1816   oop o = JNIHandles::resolve_non_null(obj);

     1817   klassOop k = o->klass();

     1818   int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);

     1819   // Keep JVMTI addition small and only check enabled flag here.

     1820   // jni_SetField_probe_nh() assumes that is not okay to create handles

     1821   // and creates a ResetNoHandleMark.

     1822   if (JvmtiExport::should_post_field_modification()) {

     1823     jvalue field_value;

     1824     field_value.l = value;

     1825     o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, 'L', (jvalue *)&field_value);

     1826   }

     1827   o->obj_field_put(offset, JNIHandles::resolve(value));

     1828   DTRACE_PROBE(hotspot_jni, SetObjectField__return);

     1829 JNI_END

     1830 

     1831 #define DEFINE_SETFIELD(Argument,Fieldname,Result,SigType,unionType) \

     1832 \

     1833 JNI_QUICK_ENTRY(void, jni_Set##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID, Argument value)) \

     1834   JNIWrapper("Set" XSTR(Result) "Field"); \

     1835 \

     1836   HS_DTRACE_PROBE_CDECL_N(hotspot_jni, Set##Result##Field__entry, \

     1837     ( JNIEnv*, jobject, jfieldID FP_SELECT_##Result(COMMA Argument,/*empty*/) ) ); \

     1838   HS_DTRACE_PROBE_N(hotspot_jni, Set##Result##Field__entry, \

     1839     ( env, obj, fieldID FP_SELECT_##Result(COMMA value,/*empty*/) ) ); \

     1840 \

     1841   oop o = JNIHandles::resolve_non_null(obj); \

     1842   klassOop k = o->klass(); \

     1843   int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);  \

     1844   /* Keep JVMTI addition small and only check enabled flag here.       */ \

     1845   /* jni_SetField_probe_nh() assumes that is not okay to create handles */ \

     1846   /* and creates a ResetNoHandleMark.                                   */ \

     1847   if (JvmtiExport::should_post_field_modification()) { \

     1848     jvalue field_value; \

     1849     field_value.unionType = value; \

     1850     o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, SigType, (jvalue *)&field_value); \

     1851   } \

     1852   o->Fieldname##_field_put(offset, value); \

     1853   DTRACE_PROBE(hotspot_jni, Set##Result##Field__return);\

     1854 JNI_END

     1855 

     1856 DEFINE_SETFIELD(jboolean, bool,   Boolean, 'Z', z)

     1857 DEFINE_SETFIELD(jbyte,    byte,   Byte,    'B', b)

     1858 DEFINE_SETFIELD(jchar,    char,   Char,    'C', c)

     1859 DEFINE_SETFIELD(jshort,   short,  Short,   'S', s)

     1860 DEFINE_SETFIELD(jint,     int,    Int,     'I', i)

     1861 DEFINE_SETFIELD(jlong,    long,   Long,    'J', j)

     1862 DEFINE_SETFIELD(jfloat,   float,  Float,   'F', f)

     1863 DEFINE_SETFIELD(jdouble,  double, Double,  'D', d)

     1864 

     1865 DT_RETURN_MARK_DECL(ToReflectedField, jobject);

     1866 

     1867 JNI_ENTRY(jobject, jni_ToReflectedField(JNIEnv *env, jclass cls, jfieldID fieldID, jboolean isStatic))

     1868   JNIWrapper("ToReflectedField");

     1869   DTRACE_PROBE4(hotspot_jni, ToReflectedField__entry,

     1870                 env, cls, fieldID, isStatic);

     1871   jobject ret = NULL;

     1872   DT_RETURN_MARK(ToReflectedField, jobject, (const jobject&)ret);

     1873 

     1874   fieldDescriptor fd;

     1875   bool found = false;

     1876   klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));

     1877 

     1878   assert(jfieldIDWorkaround::is_static_jfieldID(fieldID) == (isStatic != 0), "invalid fieldID");

     1879 

     1880   if (isStatic) {

     1881     // Static field. The fieldID a JNIid specifying the field holder and the offset within the klassOop.

     1882     JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);

     1883     assert(id->is_static_field_id(), "invalid static field id");

     1884     found = id->find_local_field(&fd);

     1885   } else {

     1886     // Non-static field. The fieldID is really the offset of the field within the instanceOop.

     1887     int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);

     1888     found = instanceKlass::cast(k)->find_field_from_offset(offset, false, &fd);

     1889   }

     1890   assert(found, "bad fieldID passed into jni_ToReflectedField");

     1891   oop reflected = Reflection::new_field(&fd, UseNewReflection, CHECK_NULL);

     1892   ret = JNIHandles::make_local(env, reflected);

     1893   return ret;

     1894 JNI_END

     1895 

     1896 

     1897 //

     1898 // Accessing Static Fields

     1899 //

     1900 DT_RETURN_MARK_DECL(GetStaticFieldID, jfieldID);

     1901 

     1902 JNI_ENTRY(jfieldID, jni_GetStaticFieldID(JNIEnv *env, jclass clazz,

     1903           const char *name, const char *sig))

     1904   JNIWrapper("GetStaticFieldID");

     1905   DTRACE_PROBE4(hotspot_jni, GetStaticFieldID__entry, env, clazz, name, sig);

     1906   jfieldID ret = NULL;

     1907   DT_RETURN_MARK(GetStaticFieldID, jfieldID, (const jfieldID&)ret);

     1908 

     1909   // The class should have been loaded (we have an instance of the class

     1910   // passed in) so the field and signature should already be in the symbol

     1911   // table.  If they're not there, the field doesn't exist.

     1912   TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name));

     1913   TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig));

     1914   if (fieldname == NULL || signame == NULL) {

     1915     THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);

     1916   }

     1917   KlassHandle k(THREAD,

     1918                 java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(clazz)));

     1919   // Make sure class is initialized before handing id's out to static fields

     1920   Klass::cast(k())->initialize(CHECK_NULL);

     1921 

     1922   fieldDescriptor fd;

     1923   if (!Klass::cast(k())->oop_is_instance() ||

     1924       !instanceKlass::cast(k())->find_field(fieldname, signame, true, &fd)) {

     1925     THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);

     1926   }

     1927 

     1928   // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the klassOop

     1929   JNIid* id = instanceKlass::cast(fd.field_holder())->jni_id_for(fd.offset());

     1930   debug_only(id->set_is_static_field_id();)

     1931 

     1932   debug_only(id->verify(fd.field_holder()));

     1933 

     1934   ret = jfieldIDWorkaround::to_static_jfieldID(id);

     1935   return ret;

     1936 JNI_END

     1937 

     1938 

     1939 JNI_ENTRY(jobject, jni_GetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID))

     1940   JNIWrapper("GetStaticObjectField");

     1941   DTRACE_PROBE3(hotspot_jni, GetStaticObjectField__entry, env, clazz, fieldID);

     1942 #ifndef JNICHECK_KERNEL

     1943   DEBUG_ONLY(klassOop param_k = jniCheck::validate_class(thread, clazz);)

     1944 #endif // JNICHECK_KERNEL

     1945   JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);

     1946   assert(id->is_static_field_id(), "invalid static field id");

     1947   // Keep JVMTI addition small and only check enabled flag here.

     1948   // jni_GetField_probe() assumes that is okay to create handles.

     1949   if (JvmtiExport::should_post_field_access()) {

     1950     JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true);

     1951   }

     1952   jobject ret = JNIHandles::make_local(id->holder()->java_mirror()->obj_field(id->offset()));

     1953   DTRACE_PROBE1(hotspot_jni, GetStaticObjectField__return, ret);

     1954   return ret;

     1955 JNI_END

     1956 

     1957 #define DEFINE_GETSTATICFIELD(Return,Fieldname,Result) \

     1958 \

     1959   DT_RETURN_MARK_DECL_FOR(Result, GetStatic##Result##Field, Return);\

     1960 \

     1961 JNI_ENTRY(Return, jni_GetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID)) \

     1962   JNIWrapper("GetStatic" XSTR(Result) "Field"); \

     1963   DTRACE_PROBE3(hotspot_jni, GetStatic##Result##Field__entry, env, clazz, fieldID);\

     1964   Return ret = 0;\

     1965   DT_RETURN_MARK_FOR(Result, GetStatic##Result##Field, Return, \

     1966                      (const Return&)ret);\

     1967   JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \

     1968   assert(id->is_static_field_id(), "invalid static field id"); \

     1969   /* Keep JVMTI addition small and only check enabled flag here. */ \

     1970   /* jni_GetField_probe() assumes that is okay to create handles. */ \

     1971   if (JvmtiExport::should_post_field_access()) { \

     1972     JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true); \

     1973   } \

     1974   ret = id->holder()->java_mirror()-> Fieldname##_field (id->offset()); \

     1975   return ret;\

     1976 JNI_END

     1977 

     1978 DEFINE_GETSTATICFIELD(jboolean, bool,   Boolean)

     1979 DEFINE_GETSTATICFIELD(jbyte,    byte,   Byte)

     1980 DEFINE_GETSTATICFIELD(jchar,    char,   Char)

     1981 DEFINE_GETSTATICFIELD(jshort,   short,  Short)

     1982 DEFINE_GETSTATICFIELD(jint,     int,    Int)

     1983 DEFINE_GETSTATICFIELD(jlong,    long,   Long)

     1984 DEFINE_GETSTATICFIELD(jfloat,   float,  Float)

     1985 DEFINE_GETSTATICFIELD(jdouble,  double, Double)

     1986 

     1987 

     1988 JNI_ENTRY(void, jni_SetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID, jobject value))

     1989   JNIWrapper("SetStaticObjectField");

     1990   DTRACE_PROBE4(hotspot_jni, SetStaticObjectField__entry, env, clazz, fieldID, value);

     1991   JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);

     1992   assert(id->is_static_field_id(), "invalid static field id");

     1993   // Keep JVMTI addition small and only check enabled flag here.

     1994   // jni_SetField_probe() assumes that is okay to create handles.

     1995   if (JvmtiExport::should_post_field_modification()) {

     1996     jvalue field_value;

     1997     field_value.l = value;

     1998     JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, 'L', (jvalue *)&field_value);

     1999   }

     2000   id->holder()->java_mirror()->obj_field_put(id->offset(), JNIHandles::resolve(value));

     2001   DTRACE_PROBE(hotspot_jni, SetStaticObjectField__return);

     2002 JNI_END

     2003 

     2004 

     2005 #define DEFINE_SETSTATICFIELD(Argument,Fieldname,Result,SigType,unionType) \

     2006 \

     2007 JNI_ENTRY(void, jni_SetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID, Argument value)) \

     2008   JNIWrapper("SetStatic" XSTR(Result) "Field"); \

     2009   HS_DTRACE_PROBE_CDECL_N(hotspot_jni, SetStatic##Result##Field__entry,\

     2010     ( JNIEnv*, jclass, jfieldID FP_SELECT_##Result(COMMA Argument,/*empty*/) ) ); \

     2011   HS_DTRACE_PROBE_N(hotspot_jni, SetStatic##Result##Field__entry, \

     2012     ( env, clazz, fieldID FP_SELECT_##Result(COMMA value,/*empty*/) ) ); \

     2013 \

     2014   JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \

     2015   assert(id->is_static_field_id(), "invalid static field id"); \

     2016   /* Keep JVMTI addition small and only check enabled flag here. */ \

     2017   /* jni_SetField_probe() assumes that is okay to create handles. */ \

     2018   if (JvmtiExport::should_post_field_modification()) { \

     2019     jvalue field_value; \

     2020     field_value.unionType = value; \

     2021     JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, SigType, (jvalue *)&field_value); \

     2022   } \

     2023   id->holder()->java_mirror()-> Fieldname##_field_put (id->offset(), value); \

     2024   DTRACE_PROBE(hotspot_jni, SetStatic##Result##Field__return);\

     2025 JNI_END

     2026 

     2027 DEFINE_SETSTATICFIELD(jboolean, bool,   Boolean, 'Z', z)

     2028 DEFINE_SETSTATICFIELD(jbyte,    byte,   Byte,    'B', b)

     2029 DEFINE_SETSTATICFIELD(jchar,    char,   Char,    'C', c)

     2030 DEFINE_SETSTATICFIELD(jshort,   short,  Short,   'S', s)

     2031 DEFINE_SETSTATICFIELD(jint,     int,    Int,     'I', i)

     2032 DEFINE_SETSTATICFIELD(jlong,    long,   Long,    'J', j)

     2033 DEFINE_SETSTATICFIELD(jfloat,   float,  Float,   'F', f)

     2034 DEFINE_SETSTATICFIELD(jdouble,  double, Double,  'D', d)

     2035 

     2036 

     2037 //

     2038 // String Operations

     2039 //

     2040 

     2041 // Unicode Interface

     2042 

     2043 DT_RETURN_MARK_DECL(NewString, jstring);

     2044 

     2045 JNI_ENTRY(jstring, jni_NewString(JNIEnv *env, const jchar *unicodeChars, jsize len))

     2046   JNIWrapper("NewString");

     2047   DTRACE_PROBE3(hotspot_jni, NewString__entry, env, unicodeChars, len);

     2048   jstring ret = NULL;

     2049   DT_RETURN_MARK(NewString, jstring, (const jstring&)ret);

     2050   oop string=java_lang_String::create_oop_from_unicode((jchar*) unicodeChars, len, CHECK_NULL);

     2051   ret = (jstring) JNIHandles::make_local(env, string);

     2052   return ret;

     2053 JNI_END

     2054 

     2055 

     2056 JNI_QUICK_ENTRY(jsize, jni_GetStringLength(JNIEnv *env, jstring string))

     2057   JNIWrapper("GetStringLength");

     2058   DTRACE_PROBE2(hotspot_jni, GetStringLength__entry, env, string);

     2059   jsize ret = java_lang_String::length(JNIHandles::resolve_non_null(string));

     2060   DTRACE_PROBE1(hotspot_jni, GetStringLength__return, ret);

     2061   return ret;

     2062 JNI_END

     2063 

     2064 

     2065 JNI_QUICK_ENTRY(const jchar*, jni_GetStringChars(

     2066   JNIEnv *env, jstring string, jboolean *isCopy))

     2067   JNIWrapper("GetStringChars");

     2068   DTRACE_PROBE3(hotspot_jni, GetStringChars__entry, env, string, isCopy);

     2069   //%note jni_5

     2070   if (isCopy != NULL) {

     2071     *isCopy = JNI_TRUE;

     2072   }

     2073   oop s = JNIHandles::resolve_non_null(string);

     2074   int s_len = java_lang_String::length(s);

     2075   typeArrayOop s_value = java_lang_String::value(s);

     2076   int s_offset = java_lang_String::offset(s);

     2077   jchar* buf = NEW_C_HEAP_ARRAY(jchar, s_len + 1);  // add one for zero termination

     2078   if (s_len > 0) {

     2079     memcpy(buf, s_value->char_at_addr(s_offset), sizeof(jchar)*s_len);

     2080   }

     2081   buf[s_len] = 0;

     2082   DTRACE_PROBE1(hotspot_jni, GetStringChars__return, buf);

     2083   return buf;

     2084 JNI_END

     2085 

     2086 

     2087 JNI_QUICK_ENTRY(void, jni_ReleaseStringChars(JNIEnv *env, jstring str, const jchar *chars))

     2088   JNIWrapper("ReleaseStringChars");

     2089   DTRACE_PROBE3(hotspot_jni, ReleaseStringChars__entry, env, str, chars);

     2090   //%note jni_6

     2091   if (chars != NULL) {

     2092     // Since String objects are supposed to be immutable, don't copy any

     2093     // new data back.  A bad user will have to go after the char array.

     2094     FreeHeap((void*) chars);

     2095   }

     2096   DTRACE_PROBE(hotspot_jni, ReleaseStringChars__return);

     2097 JNI_END

     2098 

     2099 

     2100 // UTF Interface

     2101 

     2102 DT_RETURN_MARK_DECL(NewStringUTF, jstring);

     2103 

     2104 JNI_ENTRY(jstring, jni_NewStringUTF(JNIEnv *env, const char *bytes))

     2105   JNIWrapper("NewStringUTF");

     2106   DTRACE_PROBE2(hotspot_jni, NewStringUTF__entry, env, bytes);

     2107   jstring ret;

     2108   DT_RETURN_MARK(NewStringUTF, jstring, (const jstring&)ret);

     2109 

     2110   oop result = java_lang_String::create_oop_from_str((char*) bytes, CHECK_NULL);

     2111   ret = (jstring) JNIHandles::make_local(env, result);

     2112   return ret;

     2113 JNI_END

     2114 

     2115 

     2116 JNI_ENTRY(jsize, jni_GetStringUTFLength(JNIEnv *env, jstring string))

     2117   JNIWrapper("GetStringUTFLength");

     2118   DTRACE_PROBE2(hotspot_jni, GetStringUTFLength__entry, env, string);

     2119   jsize ret = java_lang_String::utf8_length(JNIHandles::resolve_non_null(string));

     2120   DTRACE_PROBE1(hotspot_jni, GetStringUTFLength__return, ret);

     2121   return ret;

     2122 JNI_END

     2123 

     2124 

     2125 JNI_ENTRY(const char*, jni_GetStringUTFChars(JNIEnv *env, jstring string, jboolean *isCopy))

     2126   JNIWrapper("GetStringUTFChars");

     2127   DTRACE_PROBE3(hotspot_jni, GetStringUTFChars__entry, env, string, isCopy);

     2128   oop java_string = JNIHandles::resolve_non_null(string);

     2129   size_t length = java_lang_String::utf8_length(java_string);

     2130   char* result = AllocateHeap(length + 1, "GetStringUTFChars");

     2131   java_lang_String::as_utf8_string(java_string, result, (int) length + 1);

     2132   if (isCopy != NULL) *isCopy = JNI_TRUE;

     2133   DTRACE_PROBE1(hotspot_jni, GetStringUTFChars__return, result);

     2134   return result;

     2135 JNI_END

     2136 

     2137 

     2138 JNI_LEAF(void, jni_ReleaseStringUTFChars(JNIEnv *env, jstring str, const char *chars))

     2139   JNIWrapper("ReleaseStringUTFChars");

     2140   DTRACE_PROBE3(hotspot_jni, ReleaseStringUTFChars__entry, env, str, chars);

     2141   if (chars != NULL) {

     2142     FreeHeap((char*) chars);

     2143   }

     2144   DTRACE_PROBE(hotspot_jni, ReleaseStringUTFChars__return);

     2145 JNI_END

     2146 

     2147 

     2148 JNI_QUICK_ENTRY(jsize, jni_GetArrayLength(JNIEnv *env, jarray array))

     2149   JNIWrapper("GetArrayLength");

     2150   DTRACE_PROBE2(hotspot_jni, GetArrayLength__entry, env, array);

     2151   arrayOop a = arrayOop(JNIHandles::resolve_non_null(array));

     2152   assert(a->is_array(), "must be array");

     2153   jsize ret = a->length();

     2154   DTRACE_PROBE1(hotspot_jni, GetArrayLength__return, ret);

     2155   return ret;

     2156 JNI_END

     2157 

     2158 

     2159 //

     2160 // Object Array Operations

     2161 //

     2162 

     2163 DT_RETURN_MARK_DECL(NewObjectArray, jobjectArray);

     2164 

     2165 JNI_ENTRY(jobjectArray, jni_NewObjectArray(JNIEnv *env, jsize length, jclass elementClass, jobject initialElement))

     2166   JNIWrapper("NewObjectArray");

     2167   DTRACE_PROBE4(hotspot_jni, NewObjectArray__entry, env, length, elementClass, initialElement);

     2168   jobjectArray ret = NULL;

     2169   DT_RETURN_MARK(NewObjectArray, jobjectArray, (const jobjectArray&)ret);

     2170   KlassHandle ek(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(elementClass)));

     2171   klassOop ako = Klass::cast(ek())->array_klass(CHECK_NULL);

     2172   KlassHandle ak = KlassHandle(THREAD, ako);

     2173   objArrayKlass::cast(ak())->initialize(CHECK_NULL);

     2174   objArrayOop result = objArrayKlass::cast(ak())->allocate(length, CHECK_NULL);

     2175   oop initial_value = JNIHandles::resolve(initialElement);

     2176   if (initial_value != NULL) {  // array already initialized with NULL

     2177     for (int index = 0; index < length; index++) {

     2178       result->obj_at_put(index, initial_value);

     2179     }

     2180   }

     2181   ret = (jobjectArray) JNIHandles::make_local(env, result);

     2182   return ret;

     2183 JNI_END

     2184 

     2185 DT_RETURN_MARK_DECL(GetObjectArrayElement, jobject);

     2186 

     2187 JNI_ENTRY(jobject, jni_GetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index))

     2188   JNIWrapper("GetObjectArrayElement");

     2189   DTRACE_PROBE3(hotspot_jni, GetObjectArrayElement__entry, env, array, index);

     2190   jobject ret = NULL;

     2191   DT_RETURN_MARK(GetObjectArrayElement, jobject, (const jobject&)ret);

     2192   objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array));

     2193   if (a->is_within_bounds(index)) {

     2194     ret = JNIHandles::make_local(env, a->obj_at(index));

     2195     return ret;

     2196   } else {

     2197     char buf[jintAsStringSize];

     2198     sprintf(buf, "%d", index);

     2199     THROW_MSG_0(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), buf);

     2200   }

     2201 JNI_END

     2202 

     2203 DT_VOID_RETURN_MARK_DECL(SetObjectArrayElement);

     2204 

     2205 JNI_ENTRY(void, jni_SetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index, jobject value))

     2206   JNIWrapper("SetObjectArrayElement");

     2207   DTRACE_PROBE4(hotspot_jni, SetObjectArrayElement__entry, env, array, index, value);

     2208   DT_VOID_RETURN_MARK(SetObjectArrayElement);

     2209 

     2210   objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array));

     2211   oop v = JNIHandles::resolve(value);

     2212   if (a->is_within_bounds(index)) {

     2213     if (v == NULL || v->is_a(objArrayKlass::cast(a->klass())->element_klass())) {

     2214       a->obj_at_put(index, v);

     2215     } else {

     2216       THROW(vmSymbols::java_lang_ArrayStoreException());

     2217     }

     2218   } else {

     2219     char buf[jintAsStringSize];

     2220     sprintf(buf, "%d", index);

     2221     THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), buf);

     2222   }

     2223 JNI_END

     2224 

     2225 

     2226 #define DEFINE_NEWSCALARARRAY(Return,Allocator,Result) \

     2227 \

     2228   DT_RETURN_MARK_DECL(New##Result##Array, Return);\

     2229 \

     2230 JNI_ENTRY(Return, \

     2231           jni_New##Result##Array(JNIEnv *env, jsize len)) \

     2232   JNIWrapper("New" XSTR(Result) "Array"); \

     2233   DTRACE_PROBE2(hotspot_jni, New##Result##Array__entry, env, len);\

     2234   Return ret = NULL;\

     2235   DT_RETURN_MARK(New##Result##Array, Return, (const Return&)ret);\

     2236 \

     2237   oop obj= oopFactory::Allocator(len, CHECK_0); \

     2238   ret = (Return) JNIHandles::make_local(env, obj); \

     2239   return ret;\

     2240 JNI_END

     2241 

     2242 DEFINE_NEWSCALARARRAY(jbooleanArray, new_boolArray,   Boolean)

     2243 DEFINE_NEWSCALARARRAY(jbyteArray,    new_byteArray,   Byte)

     2244 DEFINE_NEWSCALARARRAY(jshortArray,   new_shortArray,  Short)

     2245 DEFINE_NEWSCALARARRAY(jcharArray,    new_charArray,   Char)

     2246 DEFINE_NEWSCALARARRAY(jintArray,     new_intArray,    Int)

     2247 DEFINE_NEWSCALARARRAY(jlongArray,    new_longArray,   Long)

     2248 DEFINE_NEWSCALARARRAY(jfloatArray,   new_singleArray, Float)

     2249 DEFINE_NEWSCALARARRAY(jdoubleArray,  new_doubleArray, Double)

     2250 

     2251 

     2252 // Return an address which will fault if the caller writes to it.

     2253 

     2254 static char* get_bad_address() {

     2255   static char* bad_address = NULL;

     2256   if (bad_address == NULL) {

     2257     size_t size = os::vm_allocation_granularity();

     2258     bad_address = os::reserve_memory(size);

     2259     if (bad_address != NULL) {

     2260       os::protect_memory(bad_address, size, os::MEM_PROT_READ,

     2261                          /*is_committed*/false);

     2262     }

     2263   }

     2264   return bad_address;

     2265 }

     2266 

     2267 

     2268 #define DEFINE_GETSCALARARRAYELEMENTS(ElementTag,ElementType,Result, Tag) \

     2269 \

     2270 JNI_QUICK_ENTRY(ElementType*, \

     2271           jni_Get##Result##ArrayElements(JNIEnv *env, ElementType##Array array, jboolean *isCopy)) \

     2272   JNIWrapper("Get" XSTR(Result) "ArrayElements"); \

     2273   DTRACE_PROBE3(hotspot_jni, Get##Result##ArrayElements__entry, env, array, isCopy);\

     2274   /* allocate an chunk of memory in c land */ \

     2275   typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \

     2276   ElementType* result; \

     2277   int len = a->length(); \

     2278   if (len == 0) { \

     2279     /* Empty array: legal but useless, can't return NULL. \

     2280      * Return a pointer to something useless. \

     2281      * Avoid asserts in typeArrayOop. */ \

     2282     result = (ElementType*)get_bad_address(); \

     2283   } else { \

     2284     result = NEW_C_HEAP_ARRAY(ElementType, len); \

     2285     /* copy the array to the c chunk */ \

     2286     memcpy(result, a->Tag##_at_addr(0), sizeof(ElementType)*len); \

     2287   } \

     2288   if (isCopy) *isCopy = JNI_TRUE; \

     2289   DTRACE_PROBE1(hotspot_jni, Get##Result##ArrayElements__return, result);\

     2290   return result; \

     2291 JNI_END

     2292 

     2293 DEFINE_GETSCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool)

     2294 DEFINE_GETSCALARARRAYELEMENTS(T_BYTE,    jbyte,    Byte,    byte)

     2295 DEFINE_GETSCALARARRAYELEMENTS(T_SHORT,   jshort,   Short,   short)

     2296 DEFINE_GETSCALARARRAYELEMENTS(T_CHAR,    jchar,    Char,    char)

     2297 DEFINE_GETSCALARARRAYELEMENTS(T_INT,     jint,     Int,     int)

     2298 DEFINE_GETSCALARARRAYELEMENTS(T_LONG,    jlong,    Long,    long)

     2299 DEFINE_GETSCALARARRAYELEMENTS(T_FLOAT,   jfloat,   Float,   float)

     2300 DEFINE_GETSCALARARRAYELEMENTS(T_DOUBLE,  jdouble,  Double,  double)

     2301 

     2302 

     2303 #define DEFINE_RELEASESCALARARRAYELEMENTS(ElementTag,ElementType,Result,Tag) \

     2304 \

     2305 JNI_QUICK_ENTRY(void, \

     2306           jni_Release##Result##ArrayElements(JNIEnv *env, ElementType##Array array, \

     2307                                              ElementType *buf, jint mode)) \

     2308   JNIWrapper("Release" XSTR(Result) "ArrayElements"); \

     2309   DTRACE_PROBE4(hotspot_jni, Release##Result##ArrayElements__entry, env, array, buf, mode);\

     2310   typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \

     2311   int len = a->length(); \

     2312   if (len != 0) {   /* Empty array:  nothing to free or copy. */  \

     2313     if ((mode == 0) || (mode == JNI_COMMIT)) { \

     2314       memcpy(a->Tag##_at_addr(0), buf, sizeof(ElementType)*len); \

     2315     } \

     2316     if ((mode == 0) || (mode == JNI_ABORT)) { \

     2317       FreeHeap(buf); \

     2318     } \

     2319   } \

     2320   DTRACE_PROBE(hotspot_jni, Release##Result##ArrayElements__return);\

     2321 JNI_END

     2322 

     2323 DEFINE_RELEASESCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool)

     2324 DEFINE_RELEASESCALARARRAYELEMENTS(T_BYTE,    jbyte,    Byte,    byte)

     2325 DEFINE_RELEASESCALARARRAYELEMENTS(T_SHORT,   jshort,   Short,   short)

     2326 DEFINE_RELEASESCALARARRAYELEMENTS(T_CHAR,    jchar,    Char,    char)

     2327 DEFINE_RELEASESCALARARRAYELEMENTS(T_INT,     jint,     Int,     int)

     2328 DEFINE_RELEASESCALARARRAYELEMENTS(T_LONG,    jlong,    Long,    long)

     2329 DEFINE_RELEASESCALARARRAYELEMENTS(T_FLOAT,   jfloat,   Float,   float)

     2330 DEFINE_RELEASESCALARARRAYELEMENTS(T_DOUBLE,  jdouble,  Double,  double)

     2331 

     2332 #define DEFINE_GETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag) \

     2333   DT_VOID_RETURN_MARK_DECL(Get##Result##ArrayRegion);\

     2334 \

     2335 JNI_ENTRY(void, \

     2336 jni_Get##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \

     2337              jsize len, ElementType *buf)) \

     2338   JNIWrapper("Get" XSTR(Result) "ArrayRegion"); \

     2339   DTRACE_PROBE5(hotspot_jni, Get##Result##ArrayRegion__entry, env, array, start, len, buf);\

     2340   DT_VOID_RETURN_MARK(Get##Result##ArrayRegion); \

     2341   typeArrayOop src = typeArrayOop(JNIHandles::resolve_non_null(array)); \

     2342   if (start < 0 || len < 0 || ((unsigned int)start + (unsigned int)len > (unsigned int)src->length())) { \

     2343     THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); \

     2344   } else { \

     2345     if (len > 0) { \

     2346       int sc = typeArrayKlass::cast(src->klass())->log2_element_size(); \

     2347       memcpy((u_char*) buf, \

     2348              (u_char*) src->Tag##_at_addr(start), \

     2349              len << sc);                          \

     2350     } \

     2351   } \

     2352 JNI_END

     2353 

     2354 DEFINE_GETSCALARARRAYREGION(T_BOOLEAN, jboolean,Boolean, bool)

     2355 DEFINE_GETSCALARARRAYREGION(T_BYTE,    jbyte,   Byte,    byte)

     2356 DEFINE_GETSCALARARRAYREGION(T_SHORT,   jshort,  Short,   short)

     2357 DEFINE_GETSCALARARRAYREGION(T_CHAR,    jchar,   Char,    char)

     2358 DEFINE_GETSCALARARRAYREGION(T_INT,     jint,    Int,     int)

     2359 DEFINE_GETSCALARARRAYREGION(T_LONG,    jlong,   Long,    long)

     2360 DEFINE_GETSCALARARRAYREGION(T_FLOAT,   jfloat,  Float,   float)

     2361 DEFINE_GETSCALARARRAYREGION(T_DOUBLE,  jdouble, Double,  double)

     2362 

     2363 #define DEFINE_SETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag) \

     2364   DT_VOID_RETURN_MARK_DECL(Set##Result##ArrayRegion);\

     2365 \

     2366 JNI_ENTRY(void, \

     2367 jni_Set##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \

     2368              jsize len, const ElementType *buf)) \

     2369   JNIWrapper("Set" XSTR(Result) "ArrayRegion"); \

     2370   DTRACE_PROBE5(hotspot_jni, Set##Result##ArrayRegion__entry, env, array, start, len, buf);\

     2371   DT_VOID_RETURN_MARK(Set##Result##ArrayRegion); \

     2372   typeArrayOop dst = typeArrayOop(JNIHandles::resolve_non_null(array)); \

     2373   if (start < 0 || len < 0 || ((unsigned int)start + (unsigned int)len > (unsigned int)dst->length())) { \

     2374     THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); \

     2375   } else { \

     2376     if (len > 0) { \

     2377       int sc = typeArrayKlass::cast(dst->klass())->log2_element_size(); \

     2378       memcpy((u_char*) dst->Tag##_at_addr(start), \

     2379              (u_char*) buf, \

     2380              len << sc);    \

     2381     } \

     2382   } \

     2383 JNI_END

     2384 

     2385 DEFINE_SETSCALARARRAYREGION(T_BOOLEAN, jboolean, Boolean, bool)

     2386 DEFINE_SETSCALARARRAYREGION(T_BYTE,    jbyte,    Byte,    byte)

     2387 DEFINE_SETSCALARARRAYREGION(T_SHORT,   jshort,   Short,   short)

     2388 DEFINE_SETSCALARARRAYREGION(T_CHAR,    jchar,    Char,    char)

     2389 DEFINE_SETSCALARARRAYREGION(T_INT,     jint,     Int,     int)

     2390 DEFINE_SETSCALARARRAYREGION(T_LONG,    jlong,    Long,    long)

     2391 DEFINE_SETSCALARARRAYREGION(T_FLOAT,   jfloat,   Float,   float)

     2392 DEFINE_SETSCALARARRAYREGION(T_DOUBLE,  jdouble,  Double,  double)

     2393 

     2394 

     2395 //

     2396 // Interception of natives

     2397 //

     2398 

     2399 // The RegisterNatives call being attempted tried to register with a method that

     2400 // is not native.  Ask JVM TI what prefixes have been specified.  Then check

     2401 // to see if the native method is now wrapped with the prefixes.  See the

     2402 // SetNativeMethodPrefix(es) functions in the JVM TI Spec for details.

     2403 static methodOop find_prefixed_native(KlassHandle k,

     2404                                       Symbol* name, Symbol* signature, TRAPS) {

     2405   ResourceMark rm(THREAD);

     2406   methodOop method;

     2407   int name_len = name->utf8_length();

     2408   char* name_str = name->as_utf8();

     2409   int prefix_count;

     2410   char** prefixes = JvmtiExport::get_all_native_method_prefixes(&prefix_count);

     2411   for (int i = 0; i < prefix_count; i++) {

     2412     char* prefix = prefixes[i];

     2413     int prefix_len = (int)strlen(prefix);

     2414 

     2415     // try adding this prefix to the method name and see if it matches another method name

     2416     int trial_len = name_len + prefix_len;

     2417     char* trial_name_str = NEW_RESOURCE_ARRAY(char, trial_len + 1);

     2418     strcpy(trial_name_str, prefix);

     2419     strcat(trial_name_str, name_str);

     2420     TempNewSymbol trial_name = SymbolTable::probe(trial_name_str, trial_len);

     2421     if (trial_name == NULL) {

     2422       continue; // no such symbol, so this prefix wasn't used, try the next prefix

     2423     }

     2424     method = Klass::cast(k())->lookup_method(trial_name, signature);

     2425     if (method == NULL) {

     2426       continue; // signature doesn't match, try the next prefix

     2427     }

     2428     if (method->is_native()) {

     2429       method->set_is_prefixed_native();

     2430       return method; // wahoo, we found a prefixed version of the method, return it

     2431     }

     2432     // found as non-native, so prefix is good, add it, probably just need more prefixes

     2433     name_len = trial_len;

     2434     name_str = trial_name_str;

     2435   }

     2436   return NULL; // not found

     2437 }

     2438 

     2439 static bool register_native(KlassHandle k, Symbol* name, Symbol* signature, address entry, TRAPS) {

     2440   methodOop method = Klass::cast(k())->lookup_method(name, signature);

     2441   if (method == NULL) {

     2442     ResourceMark rm;

     2443     stringStream st;

     2444     st.print("Method %s name or signature does not match",

     2445              methodOopDesc::name_and_sig_as_C_string(Klass::cast(k()), name, signature));

     2446     THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), false);

     2447   }

     2448   if (!method->is_native()) {

     2449     // trying to register to a non-native method, see if a JVM TI agent has added prefix(es)

     2450     method = find_prefixed_native(k, name, signature, THREAD);

     2451     if (method == NULL) {

     2452       ResourceMark rm;

     2453       stringStream st;

     2454       st.print("Method %s is not declared as native",

     2455                methodOopDesc::name_and_sig_as_C_string(Klass::cast(k()), name, signature));

     2456       THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), false);

     2457     }

     2458   }

     2459 

     2460   if (entry != NULL) {

     2461     method->set_native_function(entry,

     2462       methodOopDesc::native_bind_event_is_interesting);

     2463   } else {

     2464     method->clear_native_function();

     2465   }

     2466   if (PrintJNIResolving) {

     2467     ResourceMark rm(THREAD);

     2468     tty->print_cr("[Registering JNI native method %s.%s]",

     2469       Klass::cast(method->method_holder())->external_name(),

     2470       method->name()->as_C_string());

     2471   }

     2472   return true;

     2473 }

     2474 

     2475 DT_RETURN_MARK_DECL(RegisterNatives, jint);

     2476 

     2477 JNI_ENTRY(jint, jni_RegisterNatives(JNIEnv *env, jclass clazz,

     2478                                     const JNINativeMethod *methods,

     2479                                     jint nMethods))

     2480   JNIWrapper("RegisterNatives");

     2481   DTRACE_PROBE4(hotspot_jni, RegisterNatives__entry, env, clazz, methods, nMethods);

     2482   jint ret = 0;

     2483   DT_RETURN_MARK(RegisterNatives, jint, (const jint&)ret);

     2484 

     2485   KlassHandle h_k(thread, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(clazz)));

     2486 

     2487   for (int index = 0; index < nMethods; index++) {

     2488     const char* meth_name = methods[index].name;

     2489     const char* meth_sig = methods[index].signature;

     2490     int meth_name_len = (int)strlen(meth_name);

     2491 

     2492     // The class should have been loaded (we have an instance of the class

     2493     // passed in) so the method and signature should already be in the symbol

     2494     // table.  If they're not there, the method doesn't exist.

     2495     TempNewSymbol  name = SymbolTable::probe(meth_name, meth_name_len);

     2496     TempNewSymbol  signature = SymbolTable::probe(meth_sig, (int)strlen(meth_sig));

     2497 

     2498     if (name == NULL || signature == NULL) {

     2499       ResourceMark rm;

     2500       stringStream st;

     2501       st.print("Method %s.%s%s not found", Klass::cast(h_k())->external_name(), meth_name, meth_sig);

     2502       // Must return negative value on failure

     2503       THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), -1);

     2504     }

     2505 

     2506     bool res = register_native(h_k, name, signature,

     2507                                (address) methods[index].fnPtr, THREAD);

     2508     if (!res) {

     2509       ret = -1;

     2510       break;

     2511     }

     2512   }

     2513   return ret;

     2514 JNI_END

     2515 

     2516 

     2517 JNI_ENTRY(jint, jni_UnregisterNatives(JNIEnv *env, jclass clazz))

     2518   JNIWrapper("UnregisterNatives");

     2519   DTRACE_PROBE2(hotspot_jni, UnregisterNatives__entry, env, clazz);

     2520   klassOop k   = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(clazz));

     2521   //%note jni_2

     2522   if (Klass::cast(k)->oop_is_instance()) {

     2523     for (int index = 0; index < instanceKlass::cast(k)->methods()->length(); index++) {

     2524       methodOop m = methodOop(instanceKlass::cast(k)->methods()->obj_at(index));

     2525       if (m->is_native()) {

     2526         m->clear_native_function();

     2527         m->set_signature_handler(NULL);

     2528       }

     2529     }

     2530   }

     2531   DTRACE_PROBE1(hotspot_jni, UnregisterNatives__return, 0);

     2532   return 0;

     2533 JNI_END

     2534 

     2535 //

     2536 // Monitor functions

     2537 //

     2538 

     2539 DT_RETURN_MARK_DECL(MonitorEnter, jint);

     2540 

     2541 JNI_ENTRY(jint, jni_MonitorEnter(JNIEnv *env, jobject jobj))

     2542   DTRACE_PROBE2(hotspot_jni, MonitorEnter__entry, env, jobj);

     2543   jint ret = JNI_ERR;

     2544   DT_RETURN_MARK(MonitorEnter, jint, (const jint&)ret);

     2545 

     2546   // If the object is null, we can't do anything with it

     2547   if (jobj == NULL) {

     2548     THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR);

     2549   }

     2550 

     2551   Handle obj(thread, JNIHandles::resolve_non_null(jobj));

     2552   ObjectSynchronizer::jni_enter(obj, CHECK_(JNI_ERR));

     2553   ret = JNI_OK;

     2554   return ret;

     2555 JNI_END

     2556 

     2557 DT_RETURN_MARK_DECL(MonitorExit, jint);

     2558 

     2559 JNI_ENTRY(jint, jni_MonitorExit(JNIEnv *env, jobject jobj))

     2560   DTRACE_PROBE2(hotspot_jni, MonitorExit__entry, env, jobj);

     2561   jint ret = JNI_ERR;

     2562   DT_RETURN_MARK(MonitorExit, jint, (const jint&)ret);

     2563 

     2564   // Don't do anything with a null object

     2565   if (jobj == NULL) {

     2566     THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR);

     2567   }

     2568 

     2569   Handle obj(THREAD, JNIHandles::resolve_non_null(jobj));

     2570   ObjectSynchronizer::jni_exit(obj(), CHECK_(JNI_ERR));

     2571 

     2572   ret = JNI_OK;

     2573   return ret;

     2574 JNI_END

     2575 

     2576 //

     2577 // Extensions

     2578 //

     2579 

     2580 DT_VOID_RETURN_MARK_DECL(GetStringRegion);

     2581 

     2582 JNI_ENTRY(void, jni_GetStringRegion(JNIEnv *env, jstring string, jsize start, jsize len, jchar *buf))

     2583   JNIWrapper("GetStringRegion");

     2584   DTRACE_PROBE5(hotspot_jni, GetStringRegion__entry, env, string, start, len, buf);

     2585   DT_VOID_RETURN_MARK(GetStringRegion);

     2586   oop s = JNIHandles::resolve_non_null(string);

     2587   int s_len = java_lang_String::length(s);

     2588   if (start < 0 || len < 0 || start + len > s_len) {

     2589     THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException());

     2590   } else {

     2591     if (len > 0) {

     2592       int s_offset = java_lang_String::offset(s);

     2593       typeArrayOop s_value = java_lang_String::value(s);

     2594       memcpy(buf, s_value->char_at_addr(s_offset+start), sizeof(jchar)*len);

     2595     }

     2596   }

     2597 JNI_END

     2598 

     2599 DT_VOID_RETURN_MARK_DECL(GetStringUTFRegion);

     2600 

     2601 JNI_ENTRY(void, jni_GetStringUTFRegion(JNIEnv *env, jstring string, jsize start, jsize len, char *buf))

     2602   JNIWrapper("GetStringUTFRegion");

     2603   DTRACE_PROBE5(hotspot_jni, GetStringUTFRegion__entry, env, string, start, len, buf);

     2604   DT_VOID_RETURN_MARK(GetStringUTFRegion);

     2605   oop s = JNIHandles::resolve_non_null(string);

     2606   int s_len = java_lang_String::length(s);

     2607   if (start < 0 || len < 0 || start + len > s_len) {

     2608     THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException());

     2609   } else {

     2610     //%note jni_7

     2611     if (len > 0) {

     2612       ResourceMark rm(THREAD);

     2613       char *utf_region = java_lang_String::as_utf8_string(s, start, len);

     2614       int utf_len = (int)strlen(utf_region);

     2615       memcpy(buf, utf_region, utf_len);

     2616       buf[utf_len] = 0;

     2617     } else {

     2618       // JDK null-terminates the buffer even in len is zero

     2619       if (buf != NULL) {

     2620         buf[0] = 0;

     2621       }

     2622     }

     2623   }

     2624 JNI_END

     2625 

     2626 

     2627 JNI_ENTRY(void*, jni_GetPrimitiveArrayCritical(JNIEnv *env, jarray array, jboolean *isCopy))

     2628   JNIWrapper("GetPrimitiveArrayCritical");

     2629   DTRACE_PROBE3(hotspot_jni, GetPrimitiveArrayCritical__entry, env, array, isCopy);

     2630   GC_locker::lock_critical(thread);

     2631   if (isCopy != NULL) {

     2632     *isCopy = JNI_FALSE;

     2633   }

     2634   oop a = JNIHandles::resolve_non_null(array);

     2635   assert(a->is_array(), "just checking");

     2636   BasicType type;

     2637   if (a->is_objArray()) {

     2638     type = T_OBJECT;

     2639   } else {

     2640     type = typeArrayKlass::cast(a->klass())->element_type();

     2641   }

     2642   void* ret = arrayOop(a)->base(type);

     2643   DTRACE_PROBE1(hotspot_jni, GetPrimitiveArrayCritical__return, ret);

     2644   return ret;

     2645 JNI_END

     2646 

     2647 

     2648 JNI_ENTRY(void, jni_ReleasePrimitiveArrayCritical(JNIEnv *env, jarray array, void *carray, jint mode))

     2649   JNIWrapper("ReleasePrimitiveArrayCritical");

     2650   DTRACE_PROBE4(hotspot_jni, ReleasePrimitiveArrayCritical__entry, env, array, carray, mode);

     2651   // The array, carray and mode arguments are ignored

     2652   GC_locker::unlock_critical(thread);

     2653   DTRACE_PROBE(hotspot_jni, ReleasePrimitiveArrayCritical__return);