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/*
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* Copyright 2008-2009 Sun Microsystems, Inc. All Rights Reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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* CA 95054 USA or visit www.sun.com if you need additional information or
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* have any questions.
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*
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*/
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/*
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* JSR 292 reference implementation: method handles
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*/
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#include "incls/_precompiled.incl"
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#include "incls/_methodHandles.cpp.incl"
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bool MethodHandles::_enabled = false; // set true after successful native linkage
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MethodHandleEntry* MethodHandles::_entries[MethodHandles::_EK_LIMIT] = {NULL};
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const char* MethodHandles::_entry_names[_EK_LIMIT+1] = {
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"check_mtype",
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"wrong_method_type", // what happens when there is a type mismatch
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"invokestatic", // how a MH emulates invokestatic
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"invokespecial", // ditto for the other invokes...
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"invokevirtual",
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"invokeinterface",
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"bound_ref", // these are for BMH...
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"bound_int",
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"bound_long",
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"bound_ref_direct", // (direct versions have a direct methodOop)
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"bound_int_direct",
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"bound_long_direct",
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// starting at _adapter_mh_first:
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"adapter_retype_only", // these are for AMH...
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"adapter_check_cast",
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"adapter_prim_to_prim",
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"adapter_ref_to_prim",
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"adapter_prim_to_ref",
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"adapter_swap_args",
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"adapter_rot_args",
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"adapter_dup_args",
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"adapter_drop_args",
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"adapter_collect_args",
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"adapter_spread_args",
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"adapter_flyby",
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"adapter_ricochet",
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// optimized adapter types:
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"adapter_swap_args/1",
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"adapter_swap_args/2",
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"adapter_rot_args/1,up",
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"adapter_rot_args/1,down",
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"adapter_rot_args/2,up",
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"adapter_rot_args/2,down",
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"adapter_prim_to_prim/i2i",
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"adapter_prim_to_prim/l2i",
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"adapter_prim_to_prim/d2f",
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"adapter_prim_to_prim/i2l",
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"adapter_prim_to_prim/f2d",
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"adapter_ref_to_prim/unboxi",
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"adapter_ref_to_prim/unboxl",
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"adapter_spread_args/0",
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"adapter_spread_args/1",
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"adapter_spread_args/more",
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NULL
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};
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#ifdef ASSERT
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bool MethodHandles::spot_check_entry_names() {
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assert(!strcmp(entry_name(_invokestatic_mh), "invokestatic"), "");
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assert(!strcmp(entry_name(_bound_ref_mh), "bound_ref"), "");
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assert(!strcmp(entry_name(_adapter_retype_only), "adapter_retype_only"), "");
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assert(!strcmp(entry_name(_adapter_ricochet), "adapter_ricochet"), "");
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assert(!strcmp(entry_name(_adapter_opt_unboxi), "adapter_ref_to_prim/unboxi"), "");
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return true;
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}
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#endif
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void MethodHandles::set_enabled(bool z) {
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if (_enabled != z) {
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guarantee(z && EnableMethodHandles, "can only enable once, and only if -XX:+EnableMethodHandles");
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_enabled = z;
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}
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}
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// Note: A method which does not have a TRAPS argument cannot block in the GC
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// or throw exceptions. Such methods are used in this file to do something quick
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// and local, like parse a data structure. For speed, such methods work on plain
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// oops, not handles. Trapping methods uniformly operate on handles.
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methodOop MethodHandles::decode_vmtarget(oop vmtarget, int vmindex, oop mtype,
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klassOop& receiver_limit_result, int& decode_flags_result) {
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if (vmtarget == NULL) return NULL;
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assert(methodOopDesc::nonvirtual_vtable_index < 0, "encoding");
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if (vmindex < 0) {
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// this DMH performs no dispatch; it is directly bound to a methodOop
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// A MemberName may either be directly bound to a methodOop,
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// or it may use the klass/index form; both forms mean the same thing.
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methodOop m = decode_methodOop(methodOop(vmtarget), decode_flags_result);
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if ((decode_flags_result & _dmf_has_receiver) != 0
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&& java_dyn_MethodType::is_instance(mtype)) {
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// Extract receiver type restriction from mtype.ptypes[0].
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objArrayOop ptypes = java_dyn_MethodType::ptypes(mtype);
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oop ptype0 = (ptypes == NULL || ptypes->length() < 1) ? oop(NULL) : ptypes->obj_at(0);
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if (java_lang_Class::is_instance(ptype0))
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receiver_limit_result = java_lang_Class::as_klassOop(ptype0);
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}
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if (vmindex == methodOopDesc::nonvirtual_vtable_index) {
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// this DMH can be an "invokespecial" version
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decode_flags_result &= ~_dmf_does_dispatch;
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} else {
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assert(vmindex == methodOopDesc::invalid_vtable_index, "random vmindex?");
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}
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return m;
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} else {
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decode_flags_result |= MethodHandles::_dmf_does_dispatch;
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assert(vmtarget->is_klass(), "must be class or interface");
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receiver_limit_result = (klassOop)vmtarget;
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Klass* tk = Klass::cast((klassOop)vmtarget);
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if (tk->is_interface()) {
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// an itable linkage is <interface, itable index>
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decode_flags_result |= MethodHandles::_dmf_from_interface;
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return klassItable::method_for_itable_index((klassOop)vmtarget, vmindex);
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} else {
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if (!tk->oop_is_instance())
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tk = instanceKlass::cast(SystemDictionary::object_klass());
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return ((instanceKlass*)tk)->method_at_vtable(vmindex);
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}
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}
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}
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// MemberName and DirectMethodHandle have the same linkage to the JVM internals.
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// (MemberName is the non-operational name used for queries and setup.)
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methodOop MethodHandles::decode_DirectMethodHandle(oop mh, klassOop& receiver_limit_result, int& decode_flags_result) {
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oop vmtarget = sun_dyn_DirectMethodHandle::vmtarget(mh);
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int vmindex = sun_dyn_DirectMethodHandle::vmindex(mh);
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oop mtype = sun_dyn_DirectMethodHandle::type(mh);
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return decode_vmtarget(vmtarget, vmindex, mtype, receiver_limit_result, decode_flags_result);
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}
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methodOop MethodHandles::decode_BoundMethodHandle(oop mh, klassOop& receiver_limit_result, int& decode_flags_result) {
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assert(mh->klass() == SystemDictionary::BoundMethodHandle_klass(), "");
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for (oop bmh = mh;;) {
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// Bound MHs can be stacked to bind several arguments.
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oop target = java_dyn_MethodHandle::vmtarget(bmh);
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if (target == NULL) return NULL;
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decode_flags_result |= MethodHandles::_dmf_binds_argument;
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klassOop tk = target->klass();
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if (tk == SystemDictionary::BoundMethodHandle_klass()) {
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bmh = target;
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continue;
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} else {
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if (java_dyn_MethodHandle::is_subclass(tk)) {
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//assert(tk == SystemDictionary::DirectMethodHandle_klass(), "end of BMH chain must be DMH");
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return decode_MethodHandle(target, receiver_limit_result, decode_flags_result);
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} else {
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// Optimized case: binding a receiver to a non-dispatched DMH
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// short-circuits directly to the methodOop.
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assert(target->is_method(), "must be a simple method");
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methodOop m = (methodOop) target;
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DEBUG_ONLY(int argslot = sun_dyn_BoundMethodHandle::vmargslot(bmh));
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assert(argslot == m->size_of_parameters() - 1, "must be initial argument (receiver)");
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decode_flags_result |= MethodHandles::_dmf_binds_method;
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return m;
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}
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}
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}
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}
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methodOop MethodHandles::decode_AdapterMethodHandle(oop mh, klassOop& receiver_limit_result, int& decode_flags_result) {
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assert(mh->klass() == SystemDictionary::AdapterMethodHandle_klass(), "");
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for (oop amh = mh;;) {
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// Adapter MHs can be stacked to convert several arguments.
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int conv_op = adapter_conversion_op(sun_dyn_AdapterMethodHandle::conversion(amh));
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decode_flags_result |= (_dmf_adapter_lsb << conv_op) & _DMF_ADAPTER_MASK;
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oop target = java_dyn_MethodHandle::vmtarget(amh);
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if (target == NULL) return NULL;
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klassOop tk = target->klass();
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if (tk == SystemDictionary::AdapterMethodHandle_klass()) {
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amh = target;
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continue;
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} else {
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// must be a BMH (which will bind some more arguments) or a DMH (for the final call)
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return MethodHandles::decode_MethodHandle(target, receiver_limit_result, decode_flags_result);
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}
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}
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}
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methodOop MethodHandles::decode_MethodHandle(oop mh, klassOop& receiver_limit_result, int& decode_flags_result) {
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if (mh == NULL) return NULL;
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klassOop mhk = mh->klass();
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assert(java_dyn_MethodHandle::is_subclass(mhk), "must be a MethodHandle");
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if (mhk == SystemDictionary::DirectMethodHandle_klass()) {
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return decode_DirectMethodHandle(mh, receiver_limit_result, decode_flags_result);
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} else if (mhk == SystemDictionary::BoundMethodHandle_klass()) {
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return decode_BoundMethodHandle(mh, receiver_limit_result, decode_flags_result);
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} else if (mhk == SystemDictionary::AdapterMethodHandle_klass()) {
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return decode_AdapterMethodHandle(mh, receiver_limit_result, decode_flags_result);
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} else {
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assert(false, "cannot parse this MH");
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return NULL; // random MH?
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}
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}
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methodOop MethodHandles::decode_methodOop(methodOop m, int& decode_flags_result) {
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assert(m->is_method(), "");
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if (m->is_static()) {
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// check that signature begins '(L' or '([' (not '(I', '()', etc.)
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symbolOop sig = m->signature();
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BasicType recv_bt = char2type(sig->byte_at(1));
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// Note: recv_bt might be T_ILLEGAL if byte_at(2) is ')'
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assert(sig->byte_at(0) == '(', "must be method sig");
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if (recv_bt == T_OBJECT || recv_bt == T_ARRAY)
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decode_flags_result |= _dmf_has_receiver;
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} else {
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// non-static method
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decode_flags_result |= _dmf_has_receiver;
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if (!m->can_be_statically_bound() && !m->is_initializer()) {
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decode_flags_result |= _dmf_does_dispatch;
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if (Klass::cast(m->method_holder())->is_interface())
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decode_flags_result |= _dmf_from_interface;
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}
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}
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return m;
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}
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// A trusted party is handing us a cookie to determine a method.
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// Let's boil it down to the method oop they really want.
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methodOop MethodHandles::decode_method(oop x, klassOop& receiver_limit_result, int& decode_flags_result) {
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decode_flags_result = 0;
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receiver_limit_result = NULL;
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klassOop xk = x->klass();
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if (xk == Universe::methodKlassObj()) {
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return decode_methodOop((methodOop) x, decode_flags_result);
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} else if (xk == SystemDictionary::MemberName_klass()) {
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// Note: This only works if the MemberName has already been resolved.
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return decode_MemberName(x, receiver_limit_result, decode_flags_result);
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} else if (java_dyn_MethodHandle::is_subclass(xk)) {
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return decode_MethodHandle(x, receiver_limit_result, decode_flags_result);
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} else if (xk == SystemDictionary::reflect_method_klass()) {
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oop clazz = java_lang_reflect_Method::clazz(x);
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int slot = java_lang_reflect_Method::slot(x);
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klassOop k = java_lang_Class::as_klassOop(clazz);
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if (k != NULL && Klass::cast(k)->oop_is_instance())
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return decode_methodOop(instanceKlass::cast(k)->method_with_idnum(slot),
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decode_flags_result);
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} else if (xk == SystemDictionary::reflect_constructor_klass()) {
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oop clazz = java_lang_reflect_Constructor::clazz(x);
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int slot = java_lang_reflect_Constructor::slot(x);
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klassOop k = java_lang_Class::as_klassOop(clazz);
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if (k != NULL && Klass::cast(k)->oop_is_instance())
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return decode_methodOop(instanceKlass::cast(k)->method_with_idnum(slot),
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decode_flags_result);
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} else {
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// unrecognized object
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assert(!x->is_method(), "already checked");
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assert(!sun_dyn_MemberName::is_instance(x), "already checked");
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}
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return NULL;
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}
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int MethodHandles::decode_MethodHandle_stack_pushes(oop mh) {
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if (mh->klass() == SystemDictionary::DirectMethodHandle_klass())
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return 0; // no push/pop
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int this_vmslots = java_dyn_MethodHandle::vmslots(mh);
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int last_vmslots = 0;
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oop last_mh = mh;
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for (;;) {
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oop target = java_dyn_MethodHandle::vmtarget(last_mh);
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if (target->klass() == SystemDictionary::DirectMethodHandle_klass()) {
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last_vmslots = java_dyn_MethodHandle::vmslots(target);
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break;
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} else if (!java_dyn_MethodHandle::is_instance(target)) {
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// might be klass or method
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assert(target->is_method(), "must get here with a direct ref to method");
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last_vmslots = methodOop(target)->size_of_parameters();
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break;
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}
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last_mh = target;
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}
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// If I am called with fewer VM slots than my ultimate callee,
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// it must be that I push the additionally needed slots.
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// Likewise if am called with more VM slots, I will pop them.
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return (last_vmslots - this_vmslots);
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}
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// MemberName support
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// import sun_dyn_MemberName.*
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enum {
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IS_METHOD = sun_dyn_MemberName::MN_IS_METHOD,
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IS_CONSTRUCTOR = sun_dyn_MemberName::MN_IS_CONSTRUCTOR,
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IS_FIELD = sun_dyn_MemberName::MN_IS_FIELD,
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IS_TYPE = sun_dyn_MemberName::MN_IS_TYPE,
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SEARCH_SUPERCLASSES = sun_dyn_MemberName::MN_SEARCH_SUPERCLASSES,
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SEARCH_INTERFACES = sun_dyn_MemberName::MN_SEARCH_INTERFACES,
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ALL_KINDS = IS_METHOD | IS_CONSTRUCTOR | IS_FIELD | IS_TYPE,
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VM_INDEX_UNINITIALIZED = sun_dyn_MemberName::VM_INDEX_UNINITIALIZED
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};
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void MethodHandles::init_MemberName(oop mname_oop, oop target_oop) {
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if (target_oop->klass() == SystemDictionary::reflect_field_klass()) {
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oop clazz = java_lang_reflect_Field::clazz(target_oop); // fd.field_holder()
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int slot = java_lang_reflect_Field::slot(target_oop); // fd.index()
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int mods = java_lang_reflect_Field::modifiers(target_oop);
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klassOop k = java_lang_Class::as_klassOop(clazz);
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int offset = instanceKlass::cast(k)->offset_from_fields(slot);
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init_MemberName(mname_oop, k, accessFlags_from(mods), offset);
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} else {
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int decode_flags = 0; klassOop receiver_limit = NULL;
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methodOop m = MethodHandles::decode_method(target_oop,
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receiver_limit, decode_flags);
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bool do_dispatch = ((decode_flags & MethodHandles::_dmf_does_dispatch) != 0);
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init_MemberName(mname_oop, m, do_dispatch);
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}
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}
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void MethodHandles::init_MemberName(oop mname_oop, methodOop m, bool do_dispatch) {
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int flags = ((m->is_initializer() ? IS_CONSTRUCTOR : IS_METHOD)
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|
341 |
| (jushort)( m->access_flags().as_short() & JVM_RECOGNIZED_METHOD_MODIFIERS ));
|
|
342 |
oop vmtarget = m;
|
|
343 |
int vmindex = methodOopDesc::invalid_vtable_index; // implies no info yet
|
|
344 |
if (!do_dispatch || (flags & IS_CONSTRUCTOR) || m->can_be_statically_bound())
|
|
345 |
vmindex = methodOopDesc::nonvirtual_vtable_index; // implies never any dispatch
|
|
346 |
assert(vmindex != VM_INDEX_UNINITIALIZED, "Java sentinel value");
|
|
347 |
sun_dyn_MemberName::set_vmtarget(mname_oop, vmtarget);
|
|
348 |
sun_dyn_MemberName::set_vmindex(mname_oop, vmindex);
|
|
349 |
sun_dyn_MemberName::set_flags(mname_oop, flags);
|
|
350 |
}
|
|
351 |
|
|
352 |
void MethodHandles::init_MemberName(oop mname_oop, klassOop field_holder, AccessFlags mods, int offset) {
|
|
353 |
int flags = (IS_FIELD | (jushort)( mods.as_short() & JVM_RECOGNIZED_FIELD_MODIFIERS ));
|
|
354 |
oop vmtarget = field_holder;
|
|
355 |
int vmindex = offset; // implies no info yet
|
|
356 |
assert(vmindex != VM_INDEX_UNINITIALIZED, "bad alias on vmindex");
|
|
357 |
sun_dyn_MemberName::set_vmtarget(mname_oop, vmtarget);
|
|
358 |
sun_dyn_MemberName::set_vmindex(mname_oop, vmindex);
|
|
359 |
sun_dyn_MemberName::set_flags(mname_oop, flags);
|
|
360 |
}
|
|
361 |
|
|
362 |
|
|
363 |
methodOop MethodHandles::decode_MemberName(oop mname, klassOop& receiver_limit_result, int& decode_flags_result) {
|
|
364 |
int flags = sun_dyn_MemberName::flags(mname);
|
|
365 |
if ((flags & (IS_METHOD | IS_CONSTRUCTOR)) == 0) return NULL; // not invocable
|
|
366 |
oop vmtarget = sun_dyn_MemberName::vmtarget(mname);
|
|
367 |
int vmindex = sun_dyn_MemberName::vmindex(mname);
|
|
368 |
if (vmindex == VM_INDEX_UNINITIALIZED) return NULL; // not resolved
|
|
369 |
return decode_vmtarget(vmtarget, vmindex, NULL, receiver_limit_result, decode_flags_result);
|
|
370 |
}
|
|
371 |
|
|
372 |
// An unresolved member name is a mere symbolic reference.
|
|
373 |
// Resolving it plants a vmtarget/vmindex in it,
|
|
374 |
// which refers dirctly to JVM internals.
|
|
375 |
void MethodHandles::resolve_MemberName(Handle mname, TRAPS) {
|
|
376 |
assert(sun_dyn_MemberName::is_instance(mname()), "");
|
|
377 |
#ifdef ASSERT
|
|
378 |
// If this assert throws, renegotiate the sentinel value used by the Java code,
|
|
379 |
// so that it is distinct from any valid vtable index value, and any special
|
|
380 |
// values defined in methodOopDesc::VtableIndexFlag.
|
|
381 |
// The point of the slop is to give the Java code and the JVM some room
|
|
382 |
// to independently specify sentinel values.
|
|
383 |
const int sentinel_slop = 10;
|
|
384 |
const int sentinel_limit = methodOopDesc::highest_unused_vtable_index_value - sentinel_slop;
|
|
385 |
assert(VM_INDEX_UNINITIALIZED < sentinel_limit, "Java sentinel != JVM sentinels");
|
|
386 |
#endif
|
|
387 |
if (sun_dyn_MemberName::vmindex(mname()) != VM_INDEX_UNINITIALIZED)
|
|
388 |
return; // already resolved
|
|
389 |
oop defc_oop = sun_dyn_MemberName::clazz(mname());
|
|
390 |
oop name_str = sun_dyn_MemberName::name(mname());
|
|
391 |
oop type_str = sun_dyn_MemberName::type(mname());
|
|
392 |
int flags = sun_dyn_MemberName::flags(mname());
|
|
393 |
|
|
394 |
if (defc_oop == NULL || name_str == NULL || type_str == NULL) {
|
|
395 |
THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "nothing to resolve");
|
|
396 |
}
|
|
397 |
klassOop defc_klassOop = java_lang_Class::as_klassOop(defc_oop);
|
|
398 |
defc_oop = NULL; // safety
|
|
399 |
if (defc_klassOop == NULL) return; // a primitive; no resolution possible
|
|
400 |
if (!Klass::cast(defc_klassOop)->oop_is_instance()) {
|
|
401 |
if (!Klass::cast(defc_klassOop)->oop_is_array()) return;
|
|
402 |
defc_klassOop = SystemDictionary::object_klass();
|
|
403 |
}
|
|
404 |
instanceKlassHandle defc(THREAD, defc_klassOop);
|
|
405 |
defc_klassOop = NULL; // safety
|
|
406 |
if (defc.is_null()) {
|
|
407 |
THROW_MSG(vmSymbols::java_lang_InternalError(), "primitive class");
|
|
408 |
}
|
|
409 |
defc->link_class(CHECK);
|
|
410 |
|
|
411 |
// convert the external string name to an internal symbol
|
|
412 |
symbolHandle name(THREAD, java_lang_String::as_symbol_or_null(name_str));
|
|
413 |
if (name.is_null()) return; // no such name
|
|
414 |
name_str = NULL; // safety
|
|
415 |
|
|
416 |
// convert the external string or reflective type to an internal signature
|
|
417 |
bool force_signature = (name() == vmSymbols::invoke_name());
|
|
418 |
symbolHandle type; {
|
|
419 |
symbolOop type_sym = NULL;
|
|
420 |
if (java_dyn_MethodType::is_instance(type_str)) {
|
|
421 |
type_sym = java_dyn_MethodType::as_signature(type_str, force_signature, CHECK);
|
|
422 |
} else if (java_lang_Class::is_instance(type_str)) {
|
|
423 |
type_sym = java_lang_Class::as_signature(type_str, force_signature, CHECK);
|
|
424 |
} else if (java_lang_String::is_instance(type_str)) {
|
|
425 |
if (force_signature) {
|
|
426 |
type = java_lang_String::as_symbol(type_str, CHECK);
|
|
427 |
} else {
|
|
428 |
type_sym = java_lang_String::as_symbol_or_null(type_str);
|
|
429 |
}
|
|
430 |
} else {
|
|
431 |
THROW_MSG(vmSymbols::java_lang_InternalError(), "unrecognized type");
|
|
432 |
}
|
|
433 |
if (type_sym != NULL)
|
|
434 |
type = symbolHandle(THREAD, type_sym);
|
|
435 |
}
|
|
436 |
if (type.is_null()) return; // no such signature exists in the VM
|
|
437 |
type_str = NULL; // safety
|
|
438 |
|
|
439 |
// Time to do the lookup.
|
|
440 |
switch (flags & ALL_KINDS) {
|
|
441 |
case IS_METHOD:
|
|
442 |
{
|
|
443 |
CallInfo result;
|
|
444 |
{
|
|
445 |
EXCEPTION_MARK;
|
|
446 |
if ((flags & JVM_ACC_STATIC) != 0) {
|
|
447 |
LinkResolver::resolve_static_call(result,
|
|
448 |
defc, name, type, KlassHandle(), false, false, THREAD);
|
|
449 |
} else if (defc->is_interface()) {
|
|
450 |
LinkResolver::resolve_interface_call(result, Handle(), defc,
|
|
451 |
defc, name, type, KlassHandle(), false, false, THREAD);
|
|
452 |
} else {
|
|
453 |
LinkResolver::resolve_virtual_call(result, Handle(), defc,
|
|
454 |
defc, name, type, KlassHandle(), false, false, THREAD);
|
|
455 |
}
|
|
456 |
if (HAS_PENDING_EXCEPTION) {
|
|
457 |
CLEAR_PENDING_EXCEPTION;
|
|
458 |
return;
|
|
459 |
}
|
|
460 |
}
|
|
461 |
methodHandle m = result.resolved_method();
|
|
462 |
oop vmtarget = NULL;
|
|
463 |
int vmindex = methodOopDesc::nonvirtual_vtable_index;
|
|
464 |
if (defc->is_interface()) {
|
|
465 |
vmindex = klassItable::compute_itable_index(m());
|
|
466 |
assert(vmindex >= 0, "");
|
|
467 |
} else if (result.has_vtable_index()) {
|
|
468 |
vmindex = result.vtable_index();
|
|
469 |
assert(vmindex >= 0, "");
|
|
470 |
}
|
|
471 |
assert(vmindex != VM_INDEX_UNINITIALIZED, "");
|
|
472 |
if (vmindex < 0) {
|
|
473 |
assert(result.is_statically_bound(), "");
|
|
474 |
vmtarget = m();
|
|
475 |
} else {
|
|
476 |
vmtarget = result.resolved_klass()->as_klassOop();
|
|
477 |
}
|
|
478 |
int mods = (m->access_flags().as_short() & JVM_RECOGNIZED_METHOD_MODIFIERS);
|
|
479 |
sun_dyn_MemberName::set_vmtarget(mname(), vmtarget);
|
|
480 |
sun_dyn_MemberName::set_vmindex(mname(), vmindex);
|
|
481 |
sun_dyn_MemberName::set_modifiers(mname(), mods);
|
|
482 |
DEBUG_ONLY(int junk; klassOop junk2);
|
|
483 |
assert(decode_MemberName(mname(), junk2, junk) == result.resolved_method()(),
|
|
484 |
"properly stored for later decoding");
|
|
485 |
return;
|
|
486 |
}
|
|
487 |
case IS_CONSTRUCTOR:
|
|
488 |
{
|
|
489 |
CallInfo result;
|
|
490 |
{
|
|
491 |
EXCEPTION_MARK;
|
|
492 |
if (name() == vmSymbols::object_initializer_name()) {
|
|
493 |
LinkResolver::resolve_special_call(result,
|
|
494 |
defc, name, type, KlassHandle(), false, THREAD);
|
|
495 |
} else {
|
|
496 |
break; // will throw after end of switch
|
|
497 |
}
|
|
498 |
if (HAS_PENDING_EXCEPTION) {
|
|
499 |
CLEAR_PENDING_EXCEPTION;
|
|
500 |
return;
|
|
501 |
}
|
|
502 |
}
|
|
503 |
assert(result.is_statically_bound(), "");
|
|
504 |
methodHandle m = result.resolved_method();
|
|
505 |
oop vmtarget = m();
|
|
506 |
int vmindex = methodOopDesc::nonvirtual_vtable_index;
|
|
507 |
int mods = (m->access_flags().as_short() & JVM_RECOGNIZED_METHOD_MODIFIERS);
|
|
508 |
sun_dyn_MemberName::set_vmtarget(mname(), vmtarget);
|
|
509 |
sun_dyn_MemberName::set_vmindex(mname(), vmindex);
|
|
510 |
sun_dyn_MemberName::set_modifiers(mname(), mods);
|
|
511 |
DEBUG_ONLY(int junk; klassOop junk2);
|
|
512 |
assert(decode_MemberName(mname(), junk2, junk) == result.resolved_method()(),
|
|
513 |
"properly stored for later decoding");
|
|
514 |
return;
|
|
515 |
}
|
|
516 |
case IS_FIELD:
|
|
517 |
{
|
|
518 |
// This is taken from LinkResolver::resolve_field, sans access checks.
|
|
519 |
fieldDescriptor fd; // find_field initializes fd if found
|
|
520 |
KlassHandle sel_klass(THREAD, instanceKlass::cast(defc())->find_field(name(), type(), &fd));
|
|
521 |
// check if field exists; i.e., if a klass containing the field def has been selected
|
|
522 |
if (sel_klass.is_null()) return;
|
|
523 |
oop vmtarget = sel_klass->as_klassOop();
|
|
524 |
int vmindex = fd.offset();
|
|
525 |
int mods = (fd.access_flags().as_short() & JVM_RECOGNIZED_FIELD_MODIFIERS);
|
|
526 |
if (vmindex == VM_INDEX_UNINITIALIZED) break; // should not happen
|
|
527 |
sun_dyn_MemberName::set_vmtarget(mname(), vmtarget);
|
|
528 |
sun_dyn_MemberName::set_vmindex(mname(), vmindex);
|
|
529 |
sun_dyn_MemberName::set_modifiers(mname(), mods);
|
|
530 |
return;
|
|
531 |
}
|
|
532 |
}
|
|
533 |
THROW_MSG(vmSymbols::java_lang_InternalError(), "unrecognized MemberName format");
|
|
534 |
}
|
|
535 |
|
|
536 |
// Conversely, a member name which is only initialized from JVM internals
|
|
537 |
// may have null defc, name, and type fields.
|
|
538 |
// Resolving it plants a vmtarget/vmindex in it,
|
|
539 |
// which refers directly to JVM internals.
|
|
540 |
void MethodHandles::expand_MemberName(Handle mname, int suppress, TRAPS) {
|
|
541 |
assert(sun_dyn_MemberName::is_instance(mname()), "");
|
|
542 |
oop vmtarget = sun_dyn_MemberName::vmtarget(mname());
|
|
543 |
int vmindex = sun_dyn_MemberName::vmindex(mname());
|
|
544 |
if (vmtarget == NULL || vmindex == VM_INDEX_UNINITIALIZED) {
|
|
545 |
THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "nothing to expand");
|
|
546 |
}
|
|
547 |
|
|
548 |
bool have_defc = (sun_dyn_MemberName::clazz(mname()) != NULL);
|
|
549 |
bool have_name = (sun_dyn_MemberName::name(mname()) != NULL);
|
|
550 |
bool have_type = (sun_dyn_MemberName::type(mname()) != NULL);
|
|
551 |
int flags = sun_dyn_MemberName::flags(mname());
|
|
552 |
|
|
553 |
if (suppress != 0) {
|
|
554 |
if (suppress & _suppress_defc) have_defc = true;
|
|
555 |
if (suppress & _suppress_name) have_name = true;
|
|
556 |
if (suppress & _suppress_type) have_type = true;
|
|
557 |
}
|
|
558 |
|
|
559 |
if (have_defc && have_name && have_type) return; // nothing needed
|
|
560 |
|
|
561 |
switch (flags & ALL_KINDS) {
|
|
562 |
case IS_METHOD:
|
|
563 |
case IS_CONSTRUCTOR:
|
|
564 |
{
|
|
565 |
klassOop receiver_limit = NULL;
|
|
566 |
int decode_flags = 0;
|
|
567 |
methodHandle m(THREAD, decode_vmtarget(vmtarget, vmindex, NULL,
|
|
568 |
receiver_limit, decode_flags));
|
|
569 |
if (m.is_null()) break;
|
|
570 |
if (!have_defc) {
|
|
571 |
klassOop defc = m->method_holder();
|
|
572 |
if (receiver_limit != NULL && receiver_limit != defc
|
|
573 |
&& Klass::cast(receiver_limit)->is_subtype_of(defc))
|
|
574 |
defc = receiver_limit;
|
|
575 |
sun_dyn_MemberName::set_clazz(mname(), Klass::cast(defc)->java_mirror());
|
|
576 |
}
|
|
577 |
if (!have_name) {
|
|
578 |
//not java_lang_String::create_from_symbol; let's intern member names
|
|
579 |
Handle name = StringTable::intern(m->name(), CHECK);
|
|
580 |
sun_dyn_MemberName::set_name(mname(), name());
|
|
581 |
}
|
|
582 |
if (!have_type) {
|
|
583 |
Handle type = java_lang_String::create_from_symbol(m->signature(), CHECK);
|
|
584 |
sun_dyn_MemberName::set_type(mname(), type());
|
|
585 |
}
|
|
586 |
return;
|
|
587 |
}
|
|
588 |
case IS_FIELD:
|
|
589 |
{
|
|
590 |
// This is taken from LinkResolver::resolve_field, sans access checks.
|
|
591 |
if (!vmtarget->is_klass()) break;
|
|
592 |
if (!Klass::cast((klassOop) vmtarget)->oop_is_instance()) break;
|
|
593 |
instanceKlassHandle defc(THREAD, (klassOop) vmtarget);
|
|
594 |
bool is_static = ((flags & JVM_ACC_STATIC) != 0);
|
|
595 |
fieldDescriptor fd; // find_field initializes fd if found
|
|
596 |
if (!defc->find_field_from_offset(vmindex, is_static, &fd))
|
|
597 |
break; // cannot expand
|
|
598 |
if (!have_defc) {
|
|
599 |
sun_dyn_MemberName::set_clazz(mname(), defc->java_mirror());
|
|
600 |
}
|
|
601 |
if (!have_name) {
|
|
602 |
//not java_lang_String::create_from_symbol; let's intern member names
|
|
603 |
Handle name = StringTable::intern(fd.name(), CHECK);
|
|
604 |
sun_dyn_MemberName::set_name(mname(), name());
|
|
605 |
}
|
|
606 |
if (!have_type) {
|
|
607 |
Handle type = java_lang_String::create_from_symbol(fd.signature(), CHECK);
|
|
608 |
sun_dyn_MemberName::set_type(mname(), type());
|
|
609 |
}
|
|
610 |
return;
|
|
611 |
}
|
|
612 |
}
|
|
613 |
THROW_MSG(vmSymbols::java_lang_InternalError(), "unrecognized MemberName format");
|
|
614 |
}
|
|
615 |
|
|
616 |
int MethodHandles::find_MemberNames(klassOop k,
|
|
617 |
symbolOop name, symbolOop sig,
|
|
618 |
int mflags, klassOop caller,
|
|
619 |
int skip, objArrayOop results) {
|
|
620 |
DEBUG_ONLY(No_Safepoint_Verifier nsv);
|
|
621 |
// this code contains no safepoints!
|
|
622 |
|
|
623 |
// %%% take caller into account!
|
|
624 |
|
|
625 |
if (k == NULL || !Klass::cast(k)->oop_is_instance()) return -1;
|
|
626 |
|
|
627 |
int rfill = 0, rlimit = results->length(), rskip = skip;
|
|
628 |
// overflow measurement:
|
|
629 |
int overflow = 0, overflow_limit = MAX2(1000, rlimit);
|
|
630 |
|
|
631 |
int match_flags = mflags;
|
|
632 |
bool search_superc = ((match_flags & SEARCH_SUPERCLASSES) != 0);
|
|
633 |
bool search_intfc = ((match_flags & SEARCH_INTERFACES) != 0);
|
|
634 |
bool local_only = !(search_superc | search_intfc);
|
|
635 |
bool classes_only = false;
|
|
636 |
|
|
637 |
if (name != NULL) {
|
|
638 |
if (name->utf8_length() == 0) return 0; // a match is not possible
|
|
639 |
}
|
|
640 |
if (sig != NULL) {
|
|
641 |
if (sig->utf8_length() == 0) return 0; // a match is not possible
|
|
642 |
if (sig->byte_at(0) == '(')
|
|
643 |
match_flags &= ~(IS_FIELD | IS_TYPE);
|
|
644 |
else
|
|
645 |
match_flags &= ~(IS_CONSTRUCTOR | IS_METHOD);
|
|
646 |
}
|
|
647 |
|
|
648 |
if ((match_flags & IS_TYPE) != 0) {
|
|
649 |
// NYI, and Core Reflection works quite well for this query
|
|
650 |
}
|
|
651 |
|
|
652 |
if ((match_flags & IS_FIELD) != 0) {
|
|
653 |
for (FieldStream st(k, local_only, !search_intfc); !st.eos(); st.next()) {
|
|
654 |
if (name != NULL && st.name() != name)
|
|
655 |
continue;
|
|
656 |
if (sig != NULL && st.signature() != sig)
|
|
657 |
continue;
|
|
658 |
// passed the filters
|
|
659 |
if (rskip > 0) {
|
|
660 |
--rskip;
|
|
661 |
} else if (rfill < rlimit) {
|
|
662 |
oop result = results->obj_at(rfill++);
|
|
663 |
if (!sun_dyn_MemberName::is_instance(result))
|
|
664 |
return -99; // caller bug!
|
|
665 |
MethodHandles::init_MemberName(result, st.klass()->as_klassOop(), st.access_flags(), st.offset());
|
|
666 |
} else if (++overflow >= overflow_limit) {
|
|
667 |
match_flags = 0; break; // got tired of looking at overflow
|
|
668 |
}
|
|
669 |
}
|
|
670 |
}
|
|
671 |
|
|
672 |
if ((match_flags & (IS_METHOD | IS_CONSTRUCTOR)) != 0) {
|
|
673 |
// watch out for these guys:
|
|
674 |
symbolOop init_name = vmSymbols::object_initializer_name();
|
|
675 |
symbolOop clinit_name = vmSymbols::class_initializer_name();
|
|
676 |
if (name == clinit_name) clinit_name = NULL; // hack for exposing <clinit>
|
|
677 |
bool negate_name_test = false;
|
|
678 |
// fix name so that it captures the intention of IS_CONSTRUCTOR
|
|
679 |
if (!(match_flags & IS_METHOD)) {
|
|
680 |
// constructors only
|
|
681 |
if (name == NULL) {
|
|
682 |
name = init_name;
|
|
683 |
} else if (name != init_name) {
|
|
684 |
return 0; // no constructors of this method name
|
|
685 |
}
|
|
686 |
} else if (!(match_flags & IS_CONSTRUCTOR)) {
|
|
687 |
// methods only
|
|
688 |
if (name == NULL) {
|
|
689 |
name = init_name;
|
|
690 |
negate_name_test = true; // if we see the name, we *omit* the entry
|
|
691 |
} else if (name == init_name) {
|
|
692 |
return 0; // no methods of this constructor name
|
|
693 |
}
|
|
694 |
} else {
|
|
695 |
// caller will accept either sort; no need to adjust name
|
|
696 |
}
|
|
697 |
for (MethodStream st(k, local_only, !search_intfc); !st.eos(); st.next()) {
|
|
698 |
methodOop m = st.method();
|
|
699 |
symbolOop m_name = m->name();
|
|
700 |
if (m_name == clinit_name)
|
|
701 |
continue;
|
|
702 |
if (name != NULL && ((m_name != name) ^ negate_name_test))
|
|
703 |
continue;
|
|
704 |
if (sig != NULL && m->signature() != sig)
|
|
705 |
continue;
|
|
706 |
// passed the filters
|
|
707 |
if (rskip > 0) {
|
|
708 |
--rskip;
|
|
709 |
} else if (rfill < rlimit) {
|
|
710 |
oop result = results->obj_at(rfill++);
|
|
711 |
if (!sun_dyn_MemberName::is_instance(result))
|
|
712 |
return -99; // caller bug!
|
|
713 |
MethodHandles::init_MemberName(result, m, true);
|
|
714 |
} else if (++overflow >= overflow_limit) {
|
|
715 |
match_flags = 0; break; // got tired of looking at overflow
|
|
716 |
}
|
|
717 |
}
|
|
718 |
}
|
|
719 |
|
|
720 |
// return number of elements we at leasted wanted to initialize
|
|
721 |
return rfill + overflow;
|
|
722 |
}
|
|
723 |
|
|
724 |
|
|
725 |
|
|
726 |
|
|
727 |
// Decode the vmtarget field of a method handle.
|
|
728 |
// Sanitize out methodOops, klassOops, and any other non-Java data.
|
|
729 |
// This is for debugging and reflection.
|
|
730 |
oop MethodHandles::encode_target(Handle mh, int format, TRAPS) {
|
|
731 |
assert(java_dyn_MethodHandle::is_instance(mh()), "must be a MH");
|
|
732 |
if (format == ETF_HANDLE_OR_METHOD_NAME) {
|
|
733 |
oop target = java_dyn_MethodHandle::vmtarget(mh());
|
|
734 |
if (target == NULL) {
|
|
735 |
return NULL; // unformed MH
|
|
736 |
}
|
|
737 |
klassOop tklass = target->klass();
|
|
738 |
if (Klass::cast(tklass)->is_subclass_of(SystemDictionary::object_klass())) {
|
|
739 |
return target; // target is another MH (or something else?)
|
|
740 |
}
|
|
741 |
}
|
|
742 |
if (format == ETF_DIRECT_HANDLE) {
|
|
743 |
oop target = mh();
|
|
744 |
for (;;) {
|
|
745 |
if (target->klass() == SystemDictionary::DirectMethodHandle_klass()) {
|
|
746 |
return target;
|
|
747 |
}
|
|
748 |
if (!java_dyn_MethodHandle::is_instance(target)){
|
|
749 |
return NULL; // unformed MH
|
|
750 |
}
|
|
751 |
target = java_dyn_MethodHandle::vmtarget(target);
|
|
752 |
}
|
|
753 |
}
|
|
754 |
// cases of metadata in MH.vmtarget:
|
|
755 |
// - AMH can have methodOop for static invoke with bound receiver
|
|
756 |
// - DMH can have methodOop for static invoke (on variable receiver)
|
|
757 |
// - DMH can have klassOop for dispatched (non-static) invoke
|
|
758 |
klassOop receiver_limit = NULL;
|
|
759 |
int decode_flags = 0;
|
|
760 |
methodOop m = decode_MethodHandle(mh(), receiver_limit, decode_flags);
|
|
761 |
if (m == NULL) return NULL;
|
|
762 |
switch (format) {
|
|
763 |
case ETF_REFLECT_METHOD:
|
|
764 |
// same as jni_ToReflectedMethod:
|
|
765 |
if (m->is_initializer()) {
|
|
766 |
return Reflection::new_constructor(m, THREAD);
|
|
767 |
} else {
|
|
768 |
return Reflection::new_method(m, UseNewReflection, false, THREAD);
|
|
769 |
}
|
|
770 |
|
|
771 |
case ETF_HANDLE_OR_METHOD_NAME: // method, not handle
|
|
772 |
case ETF_METHOD_NAME:
|
|
773 |
{
|
|
774 |
if (SystemDictionary::MemberName_klass() == NULL) break;
|
|
775 |
instanceKlassHandle mname_klass(THREAD, SystemDictionary::MemberName_klass());
|
|
776 |
mname_klass->initialize(CHECK_NULL);
|
|
777 |
Handle mname = mname_klass->allocate_instance_handle(CHECK_NULL);
|
|
778 |
sun_dyn_MemberName::set_vmindex(mname(), VM_INDEX_UNINITIALIZED);
|
|
779 |
bool do_dispatch = ((decode_flags & MethodHandles::_dmf_does_dispatch) != 0);
|
|
780 |
init_MemberName(mname(), m, do_dispatch);
|
|
781 |
expand_MemberName(mname, 0, CHECK_NULL);
|
|
782 |
return mname();
|
|
783 |
}
|
|
784 |
}
|
|
785 |
|
|
786 |
// Unknown format code.
|
|
787 |
char msg[50];
|
|
788 |
jio_snprintf(msg, sizeof(msg), "unknown getTarget format=%d", format);
|
|
789 |
THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), msg);
|
|
790 |
}
|
|
791 |
|
|
792 |
bool MethodHandles::class_cast_needed(klassOop src, klassOop dst) {
|
|
793 |
if (src == dst || dst == SystemDictionary::object_klass())
|
|
794 |
return false; // quickest checks
|
|
795 |
Klass* srck = Klass::cast(src);
|
|
796 |
Klass* dstk = Klass::cast(dst);
|
|
797 |
if (dstk->is_interface()) {
|
|
798 |
// interface receivers can safely be viewed as untyped,
|
|
799 |
// because interface calls always include a dynamic check
|
|
800 |
//dstk = Klass::cast(SystemDictionary::object_klass());
|
|
801 |
return false;
|
|
802 |
}
|
|
803 |
if (srck->is_interface()) {
|
|
804 |
// interface arguments must be viewed as untyped
|
|
805 |
//srck = Klass::cast(SystemDictionary::object_klass());
|
|
806 |
return true;
|
|
807 |
}
|
|
808 |
return !srck->is_subclass_of(dstk->as_klassOop());
|
|
809 |
}
|
|
810 |
|
|
811 |
static oop object_java_mirror() {
|
|
812 |
return Klass::cast(SystemDictionary::object_klass())->java_mirror();
|
|
813 |
}
|
|
814 |
|
|
815 |
bool MethodHandles::same_basic_type_for_arguments(BasicType src,
|
|
816 |
BasicType dst,
|
|
817 |
bool for_return) {
|
|
818 |
// return values can always be forgotten:
|
|
819 |
if (for_return && dst == T_VOID) return true;
|
|
820 |
assert(src != T_VOID && dst != T_VOID, "should not be here");
|
|
821 |
if (src == dst) return true;
|
|
822 |
if (type2size[src] != type2size[dst]) return false;
|
|
823 |
// allow reinterpretation casts for integral widening
|
|
824 |
if (is_subword_type(src)) { // subwords can fit in int or other subwords
|
|
825 |
if (dst == T_INT) // any subword fits in an int
|
|
826 |
return true;
|
|
827 |
if (src == T_BOOLEAN) // boolean fits in any subword
|
|
828 |
return is_subword_type(dst);
|
|
829 |
if (src == T_BYTE && dst == T_SHORT)
|
|
830 |
return true; // remaining case: byte fits in short
|
|
831 |
}
|
|
832 |
// allow float/fixed reinterpretation casts
|
|
833 |
if (src == T_FLOAT) return dst == T_INT;
|
|
834 |
if (src == T_INT) return dst == T_FLOAT;
|
|
835 |
if (src == T_DOUBLE) return dst == T_LONG;
|
|
836 |
if (src == T_LONG) return dst == T_DOUBLE;
|
|
837 |
return false;
|
|
838 |
}
|
|
839 |
|
|
840 |
const char* MethodHandles::check_method_receiver(methodOop m,
|
|
841 |
klassOop passed_recv_type) {
|
|
842 |
assert(!m->is_static(), "caller resp.");
|
|
843 |
if (passed_recv_type == NULL)
|
|
844 |
return "receiver type is primitive";
|
|
845 |
if (class_cast_needed(passed_recv_type, m->method_holder())) {
|
|
846 |
Klass* formal = Klass::cast(m->method_holder());
|
|
847 |
return SharedRuntime::generate_class_cast_message("receiver type",
|
|
848 |
formal->external_name());
|
|
849 |
}
|
|
850 |
return NULL; // checks passed
|
|
851 |
}
|
|
852 |
|
|
853 |
// Verify that m's signature can be called type-safely by a method handle
|
|
854 |
// of the given method type 'mtype'.
|
|
855 |
// It takes a TRAPS argument because it must perform symbol lookups.
|
|
856 |
void MethodHandles::verify_method_signature(methodHandle m,
|
|
857 |
Handle mtype,
|
|
858 |
int first_ptype_pos,
|
|
859 |
KlassHandle insert_ptype,
|
|
860 |
TRAPS) {
|
|
861 |
objArrayHandle ptypes(THREAD, java_dyn_MethodType::ptypes(mtype()));
|
|
862 |
int pnum = first_ptype_pos;
|
|
863 |
int pmax = ptypes->length();
|
|
864 |
int mnum = 0; // method argument
|
|
865 |
const char* err = NULL;
|
|
866 |
for (SignatureStream ss(m->signature()); !ss.is_done(); ss.next()) {
|
|
867 |
oop ptype_oop = NULL;
|
|
868 |
if (ss.at_return_type()) {
|
|
869 |
if (pnum != pmax)
|
|
870 |
{ err = "too many arguments"; break; }
|
|
871 |
ptype_oop = java_dyn_MethodType::rtype(mtype());
|
|
872 |
} else {
|
|
873 |
if (pnum >= pmax)
|
|
874 |
{ err = "not enough arguments"; break; }
|
|
875 |
if (pnum >= 0)
|
|
876 |
ptype_oop = ptypes->obj_at(pnum);
|
|
877 |
else if (insert_ptype.is_null())
|
|
878 |
ptype_oop = NULL;
|
|
879 |
else
|
|
880 |
ptype_oop = insert_ptype->java_mirror();
|
|
881 |
pnum += 1;
|
|
882 |
mnum += 1;
|
|
883 |
}
|
|
884 |
klassOop mklass = NULL;
|
|
885 |
BasicType mtype = ss.type();
|
|
886 |
if (mtype == T_ARRAY) mtype = T_OBJECT; // fold all refs to T_OBJECT
|
|
887 |
if (mtype == T_OBJECT) {
|
|
888 |
if (ptype_oop == NULL) {
|
|
889 |
// null matches any reference
|
|
890 |
continue;
|
|
891 |
}
|
|
892 |
// If we fail to resolve types at this point, we will throw an error.
|
|
893 |
symbolOop name_oop = ss.as_symbol(CHECK);
|
|
894 |
symbolHandle name(THREAD, name_oop);
|
|
895 |
instanceKlass* mk = instanceKlass::cast(m->method_holder());
|
|
896 |
Handle loader(THREAD, mk->class_loader());
|
|
897 |
Handle domain(THREAD, mk->protection_domain());
|
|
898 |
mklass = SystemDictionary::resolve_or_fail(name, loader, domain,
|
|
899 |
true, CHECK);
|
|
900 |
}
|
|
901 |
if (ptype_oop == NULL) {
|
|
902 |
// null does not match any non-reference; use Object to report the error
|
|
903 |
ptype_oop = object_java_mirror();
|
|
904 |
}
|
|
905 |
klassOop pklass = NULL;
|
|
906 |
BasicType ptype = java_lang_Class::as_BasicType(ptype_oop, &pklass);
|
|
907 |
if (!ss.at_return_type()) {
|
|
908 |
err = check_argument_type_change(ptype, pklass, mtype, mklass, mnum);
|
|
909 |
} else {
|
|
910 |
err = check_return_type_change(mtype, mklass, ptype, pklass); // note reversal!
|
|
911 |
}
|
|
912 |
if (err != NULL) break;
|
|
913 |
}
|
|
914 |
|
|
915 |
if (err != NULL) {
|
|
916 |
THROW_MSG(vmSymbols::java_lang_InternalError(), err);
|
|
917 |
}
|
|
918 |
}
|
|
919 |
|
|
920 |
// Main routine for verifying the MethodHandle.type of a proposed
|
|
921 |
// direct or bound-direct method handle.
|
|
922 |
void MethodHandles::verify_method_type(methodHandle m,
|
|
923 |
Handle mtype,
|
|
924 |
bool has_bound_recv,
|
|
925 |
KlassHandle bound_recv_type,
|
|
926 |
TRAPS) {
|
|
927 |
bool m_needs_receiver = !m->is_static();
|
|
928 |
|
|
929 |
const char* err = NULL;
|
|
930 |
|
|
931 |
int first_ptype_pos = m_needs_receiver ? 1 : 0;
|
|
932 |
if (has_bound_recv && err == NULL) {
|
|
933 |
first_ptype_pos -= 1;
|
|
934 |
if (m_needs_receiver && bound_recv_type.is_null())
|
|
935 |
{ err = "bound receiver is not an object"; goto die; }
|
|
936 |
}
|
|
937 |
|
|
938 |
if (m_needs_receiver && err == NULL) {
|
|
939 |
objArrayOop ptypes = java_dyn_MethodType::ptypes(mtype());
|
|
940 |
if (ptypes->length() < first_ptype_pos)
|
|
941 |
{ err = "receiver argument is missing"; goto die; }
|
|
942 |
if (first_ptype_pos == -1)
|
|
943 |
err = check_method_receiver(m(), bound_recv_type->as_klassOop());
|
|
944 |
else
|
|
945 |
err = check_method_receiver(m(), java_lang_Class::as_klassOop(ptypes->obj_at(0)));
|
|
946 |
if (err != NULL) goto die;
|
|
947 |
}
|
|
948 |
|
|
949 |
// Check the other arguments for mistypes.
|
|
950 |
verify_method_signature(m, mtype, first_ptype_pos, bound_recv_type, CHECK);
|
|
951 |
return;
|
|
952 |
|
|
953 |
die:
|
|
954 |
THROW_MSG(vmSymbols::java_lang_InternalError(), err);
|
|
955 |
}
|
|
956 |
|
|
957 |
void MethodHandles::verify_vmslots(Handle mh, TRAPS) {
|
|
958 |
// Verify vmslots.
|
|
959 |
int check_slots = argument_slot_count(java_dyn_MethodHandle::type(mh()));
|
|
960 |
if (java_dyn_MethodHandle::vmslots(mh()) != check_slots) {
|
|
961 |
THROW_MSG(vmSymbols::java_lang_InternalError(), "bad vmslots in BMH");
|
|
962 |
}
|
|
963 |
}
|
|
964 |
|
|
965 |
void MethodHandles::verify_vmargslot(Handle mh, int argnum, int argslot, TRAPS) {
|
|
966 |
// Verify that argslot points at the given argnum.
|
|
967 |
int check_slot = argument_slot(java_dyn_MethodHandle::type(mh()), argnum);
|
|
968 |
if (argslot != check_slot || argslot < 0) {
|
|
969 |
const char* fmt = "for argnum of %d, vmargslot is %d, should be %d";
|
|
970 |
size_t msglen = strlen(fmt) + 3*11 + 1;
|
|
971 |
char* msg = NEW_RESOURCE_ARRAY(char, msglen);
|
|
972 |
jio_snprintf(msg, msglen, fmt, argnum, argslot, check_slot);
|
|
973 |
THROW_MSG(vmSymbols::java_lang_InternalError(), msg);
|
|
974 |
}
|
|
975 |
}
|
|
976 |
|
|
977 |
// Verify the correspondence between two method types.
|
|
978 |
// Apart from the advertised changes, caller method type X must
|
|
979 |
// be able to invoke the callee method Y type with no violations
|
|
980 |
// of type integrity.
|
|
981 |
// Return NULL if all is well, else a short error message.
|
|
982 |
const char* MethodHandles::check_method_type_change(oop src_mtype, int src_beg, int src_end,
|
|
983 |
int insert_argnum, oop insert_type,
|
|
984 |
int change_argnum, oop change_type,
|
|
985 |
int delete_argnum,
|
|
986 |
oop dst_mtype, int dst_beg, int dst_end) {
|
|
987 |
objArrayOop src_ptypes = java_dyn_MethodType::ptypes(src_mtype);
|
|
988 |
objArrayOop dst_ptypes = java_dyn_MethodType::ptypes(dst_mtype);
|
|
989 |
|
|
990 |
int src_max = src_ptypes->length();
|
|
991 |
int dst_max = dst_ptypes->length();
|
|
992 |
|
|
993 |
if (src_end == -1) src_end = src_max;
|
|
994 |
if (dst_end == -1) dst_end = dst_max;
|
|
995 |
|
|
996 |
assert(0 <= src_beg && src_beg <= src_end && src_end <= src_max, "oob");
|
|
997 |
assert(0 <= dst_beg && dst_beg <= dst_end && dst_end <= dst_max, "oob");
|
|
998 |
|
|
999 |
// pending actions; set to -1 when done:
|
|
1000 |
int ins_idx = insert_argnum, chg_idx = change_argnum, del_idx = delete_argnum;
|
|
1001 |
|
|
1002 |
const char* err = NULL;
|
|
1003 |
|
|
1004 |
// Walk along each array of parameter types, including a virtual
|
|
1005 |
// NULL end marker at the end of each.
|
|
1006 |
for (int src_idx = src_beg, dst_idx = dst_beg;
|
|
1007 |
(src_idx <= src_end && dst_idx <= dst_end);
|
|
1008 |
src_idx++, dst_idx++) {
|
|
1009 |
oop src_type = (src_idx == src_end) ? oop(NULL) : src_ptypes->obj_at(src_idx);
|
|
1010 |
oop dst_type = (dst_idx == dst_end) ? oop(NULL) : dst_ptypes->obj_at(dst_idx);
|
|
1011 |
bool fix_null_src_type = false;
|
|
1012 |
|
|
1013 |
// Perform requested edits.
|
|
1014 |
if (ins_idx == src_idx) {
|
|
1015 |
// note that the inserted guy is never affected by a change or deletion
|
|
1016 |
ins_idx = -1;
|
|
1017 |
src_type = insert_type;
|
|
1018 |
fix_null_src_type = true;
|
|
1019 |
--src_idx; // back up to process src type on next loop
|
|
1020 |
src_idx = src_end;
|
|
1021 |
} else {
|
|
1022 |
// note that the changed guy can be immediately deleted
|
|
1023 |
if (chg_idx == src_idx) {
|
|
1024 |
chg_idx = -1;
|
|
1025 |
assert(src_idx < src_end, "oob");
|
|
1026 |
src_type = change_type;
|
|
1027 |
fix_null_src_type = true;
|
|
1028 |
}
|
|
1029 |
if (del_idx == src_idx) {
|
|
1030 |
del_idx = -1;
|
|
1031 |
assert(src_idx < src_end, "oob");
|
|
1032 |
--dst_idx;
|
|
1033 |
continue; // rerun loop after skipping this position
|
|
1034 |
}
|
|
1035 |
}
|
|
1036 |
|
|
1037 |
if (src_type == NULL && fix_null_src_type)
|
|
1038 |
// explicit null in this case matches any dest reference
|
|
1039 |
src_type = (java_lang_Class::is_primitive(dst_type) ? object_java_mirror() : dst_type);
|
|
1040 |
|
|
1041 |
// Compare the two argument types.
|
|
1042 |
if (src_type != dst_type) {
|
|
1043 |
if (src_type == NULL) return "not enough arguments";
|
|
1044 |
if (dst_type == NULL) return "too many arguments";
|
|
1045 |
err = check_argument_type_change(src_type, dst_type, dst_idx);
|
|
1046 |
if (err != NULL) return err;
|
|
1047 |
}
|
|
1048 |
}
|
|
1049 |
|
|
1050 |
// Now compare return types also.
|
|
1051 |
oop src_rtype = java_dyn_MethodType::rtype(src_mtype);
|
|
1052 |
oop dst_rtype = java_dyn_MethodType::rtype(dst_mtype);
|
|
1053 |
if (src_rtype != dst_rtype) {
|
|
1054 |
err = check_return_type_change(dst_rtype, src_rtype); // note reversal!
|
|
1055 |
if (err != NULL) return err;
|
|
1056 |
}
|
|
1057 |
|
|
1058 |
assert(err == NULL, "");
|
|
1059 |
return NULL; // all is well
|
|
1060 |
}
|
|
1061 |
|
|
1062 |
|
|
1063 |
const char* MethodHandles::check_argument_type_change(BasicType src_type,
|
|
1064 |
klassOop src_klass,
|
|
1065 |
BasicType dst_type,
|
|
1066 |
klassOop dst_klass,
|
|
1067 |
int argnum) {
|
|
1068 |
const char* err = NULL;
|
|
1069 |
|
|
1070 |
// just in case:
|
|
1071 |
if (src_type == T_ARRAY) src_type = T_OBJECT;
|
|
1072 |
if (dst_type == T_ARRAY) dst_type = T_OBJECT;
|
|
1073 |
|
|
1074 |
// Produce some nice messages if VerifyMethodHandles is turned on:
|
|
1075 |
if (!same_basic_type_for_arguments(src_type, dst_type, (argnum < 0))) {
|
|
1076 |
if (src_type == T_OBJECT) {
|
|
1077 |
err = ((argnum >= 0)
|
|
1078 |
? "type mismatch: passing a %s for method argument #%d, which expects primitive %s"
|
|
1079 |
: "type mismatch: returning a %s, but caller expects primitive %s");
|
|
1080 |
} else if (dst_type == T_OBJECT) {
|
|
1081 |
err = ((argnum < 0)
|
|
1082 |
? "type mismatch: passing a primitive %s for method argument #%d, which expects %s"
|
|
1083 |
: "type mismatch: returning a primitive %s, but caller expects %s");
|
|
1084 |
} else {
|
|
1085 |
err = ((argnum < 0)
|
|
1086 |
? "type mismatch: passing a %s for method argument #%d, which expects %s"
|
|
1087 |
: "type mismatch: returning a %s, but caller expects %s");
|
|
1088 |
}
|
|
1089 |
} else if (src_type == T_OBJECT && class_cast_needed(src_klass, dst_klass)) {
|
|
1090 |
if (!class_cast_needed(dst_klass, src_klass)) {
|
|
1091 |
err = ((argnum < 0)
|
|
1092 |
? "cast required: passing a %s for method argument #%d, which expects %s"
|
|
1093 |
: "cast required: returning a %s, but caller expects %s");
|
|
1094 |
} else {
|
|
1095 |
err = ((argnum < 0)
|
|
1096 |
? "reference mismatch: passing a %s for method argument #%d, which expects %s"
|
|
1097 |
: "reference mismatch: returning a %s, but caller expects %s");
|
|
1098 |
}
|
|
1099 |
} else {
|
|
1100 |
// passed the obstacle course
|
|
1101 |
return NULL;
|
|
1102 |
}
|
|
1103 |
|
|
1104 |
// format, format, format
|
|
1105 |
const char* src_name = type2name(src_type);
|
|
1106 |
const char* dst_name = type2name(dst_type);
|
|
1107 |
if (src_type == T_OBJECT) src_name = Klass::cast(src_klass)->external_name();
|
|
1108 |
if (dst_type == T_OBJECT) dst_name = Klass::cast(dst_klass)->external_name();
|
|
1109 |
if (src_name == NULL) src_name = "unknown type";
|
|
1110 |
if (dst_name == NULL) dst_name = "unknown type";
|
|
1111 |
|
|
1112 |
size_t msglen = strlen(err) + strlen(src_name) + strlen(dst_name) + (argnum < 10 ? 1 : 11);
|
|
1113 |
char* msg = NEW_RESOURCE_ARRAY(char, msglen + 1);
|
|
1114 |
if (argnum >= 0) {
|
|
1115 |
assert(strstr(err, "%d") != NULL, "");
|
|
1116 |
jio_snprintf(msg, msglen, err, src_name, argnum, dst_name);
|
|
1117 |
} else {
|
|
1118 |
assert(strstr(err, "%d") == NULL, "");
|
|
1119 |
jio_snprintf(msg, msglen, err, src_name, dst_name);
|
|
1120 |
}
|
|
1121 |
return msg;
|
|
1122 |
}
|
|
1123 |
|
|
1124 |
// Compute the depth within the stack of the given argument, i.e.,
|
|
1125 |
// the combined size of arguments to the right of the given argument.
|
|
1126 |
// For the last argument (ptypes.length-1) this will be zero.
|
|
1127 |
// For the first argument (0) this will be the size of all
|
|
1128 |
// arguments but that one. For the special number -1, this
|
|
1129 |
// will be the size of all arguments, including the first.
|
|
1130 |
// If the argument is neither -1 nor a valid argument index,
|
|
1131 |
// then return a negative number. Otherwise, the result
|
|
1132 |
// is in the range [0..vmslots] inclusive.
|
|
1133 |
int MethodHandles::argument_slot(oop method_type, int arg) {
|
|
1134 |
objArrayOop ptypes = java_dyn_MethodType::ptypes(method_type);
|
|
1135 |
int argslot = 0;
|
|
1136 |
int len = ptypes->length();
|
|
1137 |
if (arg < -1 || arg >= len) return -99;
|
|
1138 |
for (int i = len-1; i > arg; i--) {
|
|
1139 |
BasicType bt = java_lang_Class::as_BasicType(ptypes->obj_at(i));
|
|
1140 |
argslot += type2size[bt];
|
|
1141 |
}
|
|
1142 |
assert(argument_slot_to_argnum(method_type, argslot) == arg, "inverse works");
|
|
1143 |
return argslot;
|
|
1144 |
}
|
|
1145 |
|
|
1146 |
// Given a slot number, return the argument number.
|
|
1147 |
int MethodHandles::argument_slot_to_argnum(oop method_type, int query_argslot) {
|
|
1148 |
objArrayOop ptypes = java_dyn_MethodType::ptypes(method_type);
|
|
1149 |
int argslot = 0;
|
|
1150 |
int len = ptypes->length();
|
|
1151 |
for (int i = len-1; i >= 0; i--) {
|
|
1152 |
if (query_argslot == argslot) return i;
|
|
1153 |
BasicType bt = java_lang_Class::as_BasicType(ptypes->obj_at(i));
|
|
1154 |
argslot += type2size[bt];
|
|
1155 |
}
|
|
1156 |
// return pseudo-arg deepest in stack:
|
|
1157 |
if (query_argslot == argslot) return -1;
|
|
1158 |
return -99; // oob slot, or splitting a double-slot arg
|
|
1159 |
}
|
|
1160 |
|
|
1161 |
methodHandle MethodHandles::dispatch_decoded_method(methodHandle m,
|
|
1162 |
KlassHandle receiver_limit,
|
|
1163 |
int decode_flags,
|
|
1164 |
KlassHandle receiver_klass,
|
|
1165 |
TRAPS) {
|
|
1166 |
assert((decode_flags & ~_DMF_DIRECT_MASK) == 0, "must be direct method reference");
|
|
1167 |
assert((decode_flags & _dmf_has_receiver) != 0, "must have a receiver or first reference argument");
|
|
1168 |
|
|
1169 |
if (!m->is_static() &&
|
|
1170 |
(receiver_klass.is_null() || !receiver_klass->is_subtype_of(m->method_holder())))
|
|
1171 |
// given type does not match class of method, or receiver is null!
|
|
1172 |
// caller should have checked this, but let's be extra careful...
|
|
1173 |
return methodHandle();
|
|
1174 |
|
|
1175 |
if (receiver_limit.not_null() &&
|
|
1176 |
(receiver_klass.not_null() && !receiver_klass->is_subtype_of(receiver_limit())))
|
|
1177 |
// given type is not limited to the receiver type
|
|
1178 |
// note that a null receiver can match any reference value, for a static method
|
|
1179 |
return methodHandle();
|
|
1180 |
|
|
1181 |
if (!(decode_flags & MethodHandles::_dmf_does_dispatch)) {
|
|
1182 |
// pre-dispatched or static method (null receiver is OK for static)
|
|
1183 |
return m;
|
|
1184 |
|
|
1185 |
} else if (receiver_klass.is_null()) {
|
|
1186 |
// null receiver value; cannot dispatch
|
|
1187 |
return methodHandle();
|
|
1188 |
|
|
1189 |
} else if (!(decode_flags & MethodHandles::_dmf_from_interface)) {
|
|
1190 |
// perform virtual dispatch
|
|
1191 |
int vtable_index = m->vtable_index();
|
|
1192 |
guarantee(vtable_index >= 0, "valid vtable index");
|
|
1193 |
|
|
1194 |
// receiver_klass might be an arrayKlassOop but all vtables start at
|
|
1195 |
// the same place. The cast is to avoid virtual call and assertion.
|
|
1196 |
// See also LinkResolver::runtime_resolve_virtual_method.
|
|
1197 |
instanceKlass* inst = (instanceKlass*)Klass::cast(receiver_klass());
|
|
1198 |
DEBUG_ONLY(inst->verify_vtable_index(vtable_index));
|
|
1199 |
methodOop m_oop = inst->method_at_vtable(vtable_index);
|
|
1200 |
return methodHandle(THREAD, m_oop);
|
|
1201 |
|
|
1202 |
} else {
|
|
1203 |
// perform interface dispatch
|
|
1204 |
int itable_index = klassItable::compute_itable_index(m());
|
|
1205 |
guarantee(itable_index >= 0, "valid itable index");
|
|
1206 |
instanceKlass* inst = instanceKlass::cast(receiver_klass());
|
|
1207 |
methodOop m_oop = inst->method_at_itable(m->method_holder(), itable_index, THREAD);
|
|
1208 |
return methodHandle(THREAD, m_oop);
|
|
1209 |
}
|
|
1210 |
}
|
|
1211 |
|
|
1212 |
void MethodHandles::verify_DirectMethodHandle(Handle mh, methodHandle m, TRAPS) {
|
|
1213 |
// Verify type.
|
|
1214 |
Handle mtype(THREAD, java_dyn_MethodHandle::type(mh()));
|
|
1215 |
verify_method_type(m, mtype, false, KlassHandle(), CHECK);
|
|
1216 |
|
|
1217 |
// Verify vmslots.
|
|
1218 |
if (java_dyn_MethodHandle::vmslots(mh()) != m->size_of_parameters()) {
|
|
1219 |
THROW_MSG(vmSymbols::java_lang_InternalError(), "bad vmslots in DMH");
|
|
1220 |
}
|
|
1221 |
}
|
|
1222 |
|
|
1223 |
void MethodHandles::init_DirectMethodHandle(Handle mh, methodHandle m, bool do_dispatch, TRAPS) {
|
|
1224 |
// Check arguments.
|
|
1225 |
if (mh.is_null() || m.is_null() ||
|
|
1226 |
(!do_dispatch && m->is_abstract())) {
|
|
1227 |
THROW(vmSymbols::java_lang_InternalError());
|
|
1228 |
}
|
|
1229 |
|
|
1230 |
java_dyn_MethodHandle::init_vmslots(mh());
|
|
1231 |
|
|
1232 |
if (VerifyMethodHandles) {
|
|
1233 |
// The privileged code which invokes this routine should not make
|
|
1234 |
// a mistake about types, but it's better to verify.
|
|
1235 |
verify_DirectMethodHandle(mh, m, CHECK);
|
|
1236 |
}
|
|
1237 |
|
|
1238 |
// Finally, after safety checks are done, link to the target method.
|
|
1239 |
// We will follow the same path as the latter part of
|
|
1240 |
// InterpreterRuntime::resolve_invoke(), which first finds the method
|
|
1241 |
// and then decides how to populate the constant pool cache entry
|
|
1242 |
// that links the interpreter calls to the method. We need the same
|
|
1243 |
// bits, and will use the same calling sequence code.
|
|
1244 |
|
|
1245 |
int vmindex = methodOopDesc::garbage_vtable_index;
|
|
1246 |
oop vmtarget = NULL;
|
|
1247 |
|
|
1248 |
instanceKlass::cast(m->method_holder())->link_class(CHECK);
|
|
1249 |
|
|
1250 |
MethodHandleEntry* me = NULL;
|
|
1251 |
if (do_dispatch && Klass::cast(m->method_holder())->is_interface()) {
|
|
1252 |
// We are simulating an invokeinterface instruction.
|
|
1253 |
// (We might also be simulating an invokevirtual on a miranda method,
|
|
1254 |
// but it is safe to treat it as an invokeinterface.)
|
|
1255 |
assert(!m->can_be_statically_bound(), "no final methods on interfaces");
|
|
1256 |
vmindex = klassItable::compute_itable_index(m());
|
|
1257 |
assert(vmindex >= 0, "(>=0) == do_dispatch");
|
|
1258 |
// Set up same bits as ConstantPoolCacheEntry::set_interface_call().
|
|
1259 |
vmtarget = m->method_holder(); // the interface
|
|
1260 |
me = MethodHandles::entry(MethodHandles::_invokeinterface_mh);
|
|
1261 |
} else if (!do_dispatch || m->can_be_statically_bound()) {
|
|
1262 |
// We are simulating an invokestatic or invokespecial instruction.
|
|
1263 |
// Set up the method pointer, just like ConstantPoolCacheEntry::set_method().
|
|
1264 |
vmtarget = m();
|
|
1265 |
// this does not help dispatch, but it will make it possible to parse this MH:
|
|
1266 |
vmindex = methodOopDesc::nonvirtual_vtable_index;
|
|
1267 |
assert(vmindex < 0, "(>=0) == do_dispatch");
|
|
1268 |
if (!m->is_static()) {
|
|
1269 |
me = MethodHandles::entry(MethodHandles::_invokespecial_mh);
|
|
1270 |
} else {
|
|
1271 |
me = MethodHandles::entry(MethodHandles::_invokestatic_mh);
|
|
1272 |
// Part of the semantics of a static call is an initialization barrier.
|
|
1273 |
// For a DMH, it is done now, when the handle is created.
|
|
1274 |
Klass* k = Klass::cast(m->method_holder());
|
|
1275 |
if (k->should_be_initialized()) {
|
|
1276 |
k->initialize(CHECK);
|
|
1277 |
}
|
|
1278 |
}
|
|
1279 |
} else {
|
|
1280 |
// We are simulating an invokevirtual instruction.
|
|
1281 |
// Set up the vtable index, just like ConstantPoolCacheEntry::set_method().
|
|
1282 |
// The key logic is LinkResolver::runtime_resolve_virtual_method.
|
|
1283 |
vmindex = m->vtable_index();
|
|
1284 |
vmtarget = m->method_holder();
|
|
1285 |
me = MethodHandles::entry(MethodHandles::_invokevirtual_mh);
|
|
1286 |
}
|
|
1287 |
|
|
1288 |
if (me == NULL) { THROW(vmSymbols::java_lang_InternalError()); }
|
|
1289 |
|
|
1290 |
sun_dyn_DirectMethodHandle::set_vmtarget(mh(), vmtarget);
|
|
1291 |
sun_dyn_DirectMethodHandle::set_vmindex(mh(), vmindex);
|
|
1292 |
DEBUG_ONLY(int flags; klassOop rlimit);
|
|
1293 |
assert(MethodHandles::decode_method(mh(), rlimit, flags) == m(),
|
|
1294 |
"properly stored for later decoding");
|
|
1295 |
DEBUG_ONLY(bool actual_do_dispatch = ((flags & _dmf_does_dispatch) != 0));
|
|
1296 |
assert(!(actual_do_dispatch && !do_dispatch),
|
|
1297 |
"do not perform dispatch if !do_dispatch specified");
|
|
1298 |
assert(actual_do_dispatch == (vmindex >= 0), "proper later decoding of do_dispatch");
|
|
1299 |
assert(decode_MethodHandle_stack_pushes(mh()) == 0, "DMH does not move stack");
|
|
1300 |
|
|
1301 |
// Done!
|
|
1302 |
java_dyn_MethodHandle::set_vmentry(mh(), me);
|
|
1303 |
}
|
|
1304 |
|
|
1305 |
void MethodHandles::verify_BoundMethodHandle_with_receiver(Handle mh,
|
|
1306 |
methodHandle m,
|
|
1307 |
TRAPS) {
|
|
1308 |
// Verify type.
|
|
1309 |
oop receiver = sun_dyn_BoundMethodHandle::argument(mh());
|
|
1310 |
Handle mtype(THREAD, java_dyn_MethodHandle::type(mh()));
|
|
1311 |
KlassHandle bound_recv_type;
|
|
1312 |
if (receiver != NULL) bound_recv_type = KlassHandle(THREAD, receiver->klass());
|
|
1313 |
verify_method_type(m, mtype, true, bound_recv_type, CHECK);
|
|
1314 |
|
|
1315 |
int receiver_pos = m->size_of_parameters() - 1;
|
|
1316 |
|
|
1317 |
// Verify MH.vmargslot, which should point at the bound receiver.
|
|
1318 |
verify_vmargslot(mh, -1, sun_dyn_BoundMethodHandle::vmargslot(mh()), CHECK);
|
|
1319 |
//verify_vmslots(mh, CHECK);
|
|
1320 |
|
|
1321 |
// Verify vmslots.
|
|
1322 |
if (java_dyn_MethodHandle::vmslots(mh()) != receiver_pos) {
|
|
1323 |
THROW_MSG(vmSymbols::java_lang_InternalError(), "bad vmslots in BMH (receiver)");
|
|
1324 |
}
|
|
1325 |
}
|
|
1326 |
|
|
1327 |
// Initialize a BMH with a receiver bound directly to a methodOop.
|
|
1328 |
void MethodHandles::init_BoundMethodHandle_with_receiver(Handle mh,
|
|
1329 |
methodHandle original_m,
|
|
1330 |
KlassHandle receiver_limit,
|
|
1331 |
int decode_flags,
|
|
1332 |
TRAPS) {
|
|
1333 |
// Check arguments.
|
|
1334 |
if (mh.is_null() || original_m.is_null()) {
|
|
1335 |
THROW(vmSymbols::java_lang_InternalError());
|
|
1336 |
}
|
|
1337 |
|
|
1338 |
KlassHandle receiver_klass;
|
|
1339 |
{
|
|
1340 |
oop receiver_oop = sun_dyn_BoundMethodHandle::argument(mh());
|
|
1341 |
if (receiver_oop != NULL)
|
|
1342 |
receiver_klass = KlassHandle(THREAD, receiver_oop->klass());
|
|
1343 |
}
|
|
1344 |
methodHandle m = dispatch_decoded_method(original_m,
|
|
1345 |
receiver_limit, decode_flags,
|
|
1346 |
receiver_klass,
|
|
1347 |
CHECK);
|
|
1348 |
if (m.is_null()) { THROW(vmSymbols::java_lang_InternalError()); }
|
|
1349 |
if (m->is_abstract()) { THROW(vmSymbols::java_lang_AbstractMethodError()); }
|
|
1350 |
|
|
1351 |
java_dyn_MethodHandle::init_vmslots(mh());
|
|
1352 |
|
|
1353 |
if (VerifyMethodHandles) {
|
|
1354 |
verify_BoundMethodHandle_with_receiver(mh, m, CHECK);
|
|
1355 |
}
|
|
1356 |
|
|
1357 |
sun_dyn_BoundMethodHandle::set_vmtarget(mh(), m());
|
|
1358 |
|
|
1359 |
DEBUG_ONLY(int junk; klassOop junk2);
|
|
1360 |
assert(MethodHandles::decode_method(mh(), junk2, junk) == m(), "properly stored for later decoding");
|
|
1361 |
assert(decode_MethodHandle_stack_pushes(mh()) == 1, "BMH pushes one stack slot");
|
|
1362 |
|
|
1363 |
// Done!
|
|
1364 |
java_dyn_MethodHandle::set_vmentry(mh(), MethodHandles::entry(MethodHandles::_bound_ref_direct_mh));
|
|
1365 |
}
|
|
1366 |
|
|
1367 |
void MethodHandles::verify_BoundMethodHandle(Handle mh, Handle target, int argnum,
|
|
1368 |
bool direct_to_method, TRAPS) {
|
|
1369 |
Handle ptype_handle(THREAD,
|
|
1370 |
java_dyn_MethodType::ptype(java_dyn_MethodHandle::type(target()), argnum));
|
|
1371 |
KlassHandle ptype_klass;
|
|
1372 |
BasicType ptype = java_lang_Class::as_BasicType(ptype_handle(), &ptype_klass);
|
|
1373 |
int slots_pushed = type2size[ptype];
|
|
1374 |
|
|
1375 |
oop argument = sun_dyn_BoundMethodHandle::argument(mh());
|
|
1376 |
|
|
1377 |
const char* err = NULL;
|
|
1378 |
|
|
1379 |
switch (ptype) {
|
|
1380 |
case T_OBJECT:
|
|
1381 |
if (argument != NULL)
|
|
1382 |
// we must implicitly convert from the arg type to the outgoing ptype
|
|
1383 |
err = check_argument_type_change(T_OBJECT, argument->klass(), ptype, ptype_klass(), argnum);
|
|
1384 |
break;
|
|
1385 |
|
|
1386 |
case T_ARRAY: case T_VOID:
|
|
1387 |
assert(false, "array, void do not appear here");
|
|
1388 |
default:
|
|
1389 |
if (ptype != T_INT && !is_subword_type(ptype)) {
|
|
1390 |
err = "unexpected parameter type";
|
|
1391 |
break;
|
|
1392 |
}
|
|
1393 |
// check subrange of Integer.value, if necessary
|
|
1394 |
if (argument == NULL || argument->klass() != SystemDictionary::int_klass()) {
|
|
1395 |
err = "bound integer argument must be of type java.lang.Integer";
|
|
1396 |
break;
|
|
1397 |
}
|
|
1398 |
if (ptype != T_INT) {
|
|
1399 |
int value_offset = java_lang_boxing_object::value_offset_in_bytes(T_INT);
|
|
1400 |
jint value = argument->int_field(value_offset);
|
|
1401 |
int vminfo = adapter_subword_vminfo(ptype);
|
|
1402 |
jint subword = truncate_subword_from_vminfo(value, vminfo);
|
|
1403 |
if (value != subword) {
|
|
1404 |
err = "bound subword value does not fit into the subword type";
|
|
1405 |
break;
|
|
1406 |
}
|
|
1407 |
}
|
|
1408 |
break;
|
|
1409 |
case T_FLOAT:
|
|
1410 |
case T_DOUBLE:
|
|
1411 |
case T_LONG:
|
|
1412 |
{
|
|
1413 |
// we must implicitly convert from the unboxed arg type to the outgoing ptype
|
|
1414 |
BasicType argbox = java_lang_boxing_object::basic_type(argument);
|
|
1415 |
if (argbox != ptype) {
|
|
1416 |
err = check_argument_type_change(T_OBJECT, (argument == NULL
|
|
1417 |
? SystemDictionary::object_klass()
|
|
1418 |
: argument->klass()),
|
|
1419 |
ptype, ptype_klass(), argnum);
|
|
1420 |
assert(err != NULL, "this must be an error");
|
|
1421 |
}
|
|
1422 |
break;
|
|
1423 |
}
|
|
1424 |
}
|
|
1425 |
|
|
1426 |
if (err == NULL) {
|
|
1427 |
DEBUG_ONLY(int this_pushes = decode_MethodHandle_stack_pushes(mh()));
|
|
1428 |
if (direct_to_method) {
|
|
1429 |
assert(this_pushes == slots_pushed, "BMH pushes one or two stack slots");
|
|
1430 |
assert(slots_pushed <= MethodHandlePushLimit, "");
|
|
1431 |
} else {
|
|
1432 |
int prev_pushes = decode_MethodHandle_stack_pushes(target());
|
|
1433 |
assert(this_pushes == slots_pushed + prev_pushes, "BMH stack motion must be correct");
|
|
1434 |
// do not blow the stack; use a Java-based adapter if this limit is exceeded
|
|
1435 |
if (slots_pushed + prev_pushes > MethodHandlePushLimit)
|
|
1436 |
err = "too many bound parameters";
|
|
1437 |
}
|
|
1438 |
}
|
|
1439 |
|
|
1440 |
if (err == NULL) {
|
|
1441 |
// Verify the rest of the method type.
|
|
1442 |
err = check_method_type_insertion(java_dyn_MethodHandle::type(mh()),
|
|
1443 |
argnum, ptype_handle(),
|
|
1444 |
java_dyn_MethodHandle::type(target()));
|
|
1445 |
}
|
|
1446 |
|
|
1447 |
if (err != NULL) {
|
|
1448 |
THROW_MSG(vmSymbols::java_lang_InternalError(), err);
|
|
1449 |
}
|
|
1450 |
}
|
|
1451 |
|
|
1452 |
void MethodHandles::init_BoundMethodHandle(Handle mh, Handle target, int argnum, TRAPS) {
|
|
1453 |
// Check arguments.
|
|
1454 |
if (mh.is_null() || target.is_null() || !java_dyn_MethodHandle::is_instance(target())) {
|
|
1455 |
THROW(vmSymbols::java_lang_InternalError());
|
|
1456 |
}
|
|
1457 |
|
|
1458 |
java_dyn_MethodHandle::init_vmslots(mh());
|
|
1459 |
|
|
1460 |
if (VerifyMethodHandles) {
|
|
1461 |
int insert_after = argnum - 1;
|
|
1462 |
verify_vmargslot(mh, insert_after, sun_dyn_BoundMethodHandle::vmargslot(mh()), CHECK);
|
|
1463 |
verify_vmslots(mh, CHECK);
|
|
1464 |
}
|
|
1465 |
|
|
1466 |
// If (a) the target is a direct non-dispatched method handle,
|
|
1467 |
// or (b) the target is a dispatched direct method handle and we
|
|
1468 |
// are binding the receiver, cut out the middle-man.
|
|
1469 |
// Do this by decoding the DMH and using its methodOop directly as vmtarget.
|
|
1470 |
bool direct_to_method = false;
|
|
1471 |
if (OptimizeMethodHandles &&
|
|
1472 |
target->klass() == SystemDictionary::DirectMethodHandle_klass() &&
|
|
1473 |
(argnum == 0 || sun_dyn_DirectMethodHandle::vmindex(target()) < 0)) {
|
|
1474 |
int decode_flags = 0; klassOop receiver_limit_oop = NULL;
|
|
1475 |
methodHandle m(THREAD, decode_method(target(), receiver_limit_oop, decode_flags));
|
|
1476 |
if (m.is_null()) { THROW_MSG(vmSymbols::java_lang_InternalError(), "DMH failed to decode"); }
|
|
1477 |
DEBUG_ONLY(int m_vmslots = m->size_of_parameters() - 1); // pos. of 1st arg.
|
|
1478 |
assert(sun_dyn_BoundMethodHandle::vmslots(mh()) == m_vmslots, "type w/ m sig");
|
|
1479 |
if (argnum == 0 && (decode_flags & _dmf_has_receiver) != 0) {
|
|
1480 |
KlassHandle receiver_limit(THREAD, receiver_limit_oop);
|
|
1481 |
init_BoundMethodHandle_with_receiver(mh, m,
|
|
1482 |
receiver_limit, decode_flags,
|
|
1483 |
CHECK);
|
|
1484 |
return;
|
|
1485 |
}
|
|
1486 |
|
|
1487 |
// Even if it is not a bound receiver, we still might be able
|
|
1488 |
// to bind another argument and still invoke the methodOop directly.
|
|
1489 |
if (!(decode_flags & _dmf_does_dispatch)) {
|
|
1490 |
direct_to_method = true;
|
|
1491 |
sun_dyn_BoundMethodHandle::set_vmtarget(mh(), m());
|
|
1492 |
}
|
|
1493 |
}
|
|
1494 |
if (!direct_to_method)
|
|
1495 |
sun_dyn_BoundMethodHandle::set_vmtarget(mh(), target());
|
|
1496 |
|
|
1497 |
if (VerifyMethodHandles) {
|
|
1498 |
verify_BoundMethodHandle(mh, target, argnum, direct_to_method, CHECK);
|
|
1499 |
}
|
|
1500 |
|
|
1501 |
// Next question: Is this a ref, int, or long bound value?
|
|
1502 |
oop ptype_oop = java_dyn_MethodType::ptype(java_dyn_MethodHandle::type(target()), argnum);
|
|
1503 |
BasicType ptype = java_lang_Class::as_BasicType(ptype_oop);
|
|
1504 |
int slots_pushed = type2size[ptype];
|
|
1505 |
|
|
1506 |
MethodHandleEntry* me = NULL;
|
|
1507 |
if (ptype == T_OBJECT) {
|
|
1508 |
if (direct_to_method) me = MethodHandles::entry(_bound_ref_direct_mh);
|
|
1509 |
else me = MethodHandles::entry(_bound_ref_mh);
|
|
1510 |
} else if (slots_pushed == 2) {
|
|
1511 |
if (direct_to_method) me = MethodHandles::entry(_bound_long_direct_mh);
|
|
1512 |
else me = MethodHandles::entry(_bound_long_mh);
|
|
1513 |
} else if (slots_pushed == 1) {
|
|
1514 |
if (direct_to_method) me = MethodHandles::entry(_bound_int_direct_mh);
|
|
1515 |
else me = MethodHandles::entry(_bound_int_mh);
|
|
1516 |
} else {
|
|
1517 |
assert(false, "");
|
|
1518 |
}
|
|
1519 |
|
|
1520 |
// Done!
|
|
1521 |
java_dyn_MethodHandle::set_vmentry(mh(), me);
|
|
1522 |
}
|
|
1523 |
|
|
1524 |
static void throw_InternalError_for_bad_conversion(int conversion, const char* err, TRAPS) {
|
|
1525 |
char msg[200];
|
|
1526 |
jio_snprintf(msg, sizeof(msg), "bad adapter (conversion=0x%08x): %s", conversion, err);
|
|
1527 |
THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), msg);
|
|
1528 |
}
|
|
1529 |
|
|
1530 |
void MethodHandles::verify_AdapterMethodHandle(Handle mh, int argnum, TRAPS) {
|
|
1531 |
jint conversion = sun_dyn_AdapterMethodHandle::conversion(mh());
|
|
1532 |
int argslot = sun_dyn_AdapterMethodHandle::vmargslot(mh());
|
|
1533 |
|
|
1534 |
verify_vmargslot(mh, argnum, argslot, CHECK);
|
|
1535 |
verify_vmslots(mh, CHECK);
|
|
1536 |
|
|
1537 |
jint conv_op = adapter_conversion_op(conversion);
|
|
1538 |
if (!conv_op_valid(conv_op)) {
|
|
1539 |
throw_InternalError_for_bad_conversion(conversion, "unknown conversion op", THREAD);
|
|
1540 |
return;
|
|
1541 |
}
|
|
1542 |
EntryKind ek = adapter_entry_kind(conv_op);
|
|
1543 |
|
|
1544 |
int stack_move = adapter_conversion_stack_move(conversion);
|
|
1545 |
BasicType src = adapter_conversion_src_type(conversion);
|
|
1546 |
BasicType dest = adapter_conversion_dest_type(conversion);
|
|
1547 |
int vminfo = adapter_conversion_vminfo(conversion); // should be zero
|
|
1548 |
|
|
1549 |
Handle argument(THREAD, sun_dyn_AdapterMethodHandle::argument(mh()));
|
|
1550 |
Handle target(THREAD, sun_dyn_AdapterMethodHandle::vmtarget(mh()));
|
|
1551 |
Handle src_mtype(THREAD, java_dyn_MethodHandle::type(mh()));
|
|
1552 |
Handle dst_mtype(THREAD, java_dyn_MethodHandle::type(target()));
|
|
1553 |
|
|
1554 |
const char* err = NULL;
|
|
1555 |
|
|
1556 |
if (err == NULL) {
|
|
1557 |
// Check that the correct argument is supplied, but only if it is required.
|
|
1558 |
switch (ek) {
|
|
1559 |
case _adapter_check_cast: // target type of cast
|
|
1560 |
case _adapter_ref_to_prim: // wrapper type from which to unbox
|
|
1561 |
case _adapter_prim_to_ref: // wrapper type to box into
|
|
1562 |
case _adapter_collect_args: // array type to collect into
|
|
1563 |
case _adapter_spread_args: // array type to spread from
|
|
1564 |
if (!java_lang_Class::is_instance(argument())
|
|
1565 |
|| java_lang_Class::is_primitive(argument()))
|
|
1566 |
{ err = "adapter requires argument of type java.lang.Class"; break; }
|
|
1567 |
if (ek == _adapter_collect_args ||
|
|
1568 |
ek == _adapter_spread_args) {
|
|
1569 |
// Make sure it is a suitable collection type. (Array, for now.)
|
|
1570 |
Klass* ak = Klass::cast(java_lang_Class::as_klassOop(argument()));
|
|
1571 |
if (!ak->oop_is_objArray()) {
|
|
1572 |
{ err = "adapter requires argument of type java.lang.Class<Object[]>"; break; }
|
|
1573 |
}
|
|
1574 |
}
|
|
1575 |
break;
|
|
1576 |
case _adapter_flyby:
|
|
1577 |
case _adapter_ricochet:
|
|
1578 |
if (!java_dyn_MethodHandle::is_instance(argument()))
|
|
1579 |
{ err = "MethodHandle adapter argument required"; break; }
|
|
1580 |
break;
|
|
1581 |
default:
|
|
1582 |
if (argument.not_null())
|
|
1583 |
{ err = "adapter has spurious argument"; break; }
|
|
1584 |
break;
|
|
1585 |
}
|
|
1586 |
}
|
|
1587 |
|
|
1588 |
if (err == NULL) {
|
|
1589 |
// Check that the src/dest types are supplied if needed.
|
|
1590 |
switch (ek) {
|
|
1591 |
case _adapter_prim_to_prim:
|
|
1592 |
if (!is_java_primitive(src) || !is_java_primitive(dest) || src == dest) {
|
|
1593 |
err = "adapter requires primitive src/dest conversion subfields"; break;
|
|
1594 |
}
|
|
1595 |
if ( (src == T_FLOAT || src == T_DOUBLE) && !(dest == T_FLOAT || dest == T_DOUBLE) ||
|
|
1596 |
!(src == T_FLOAT || src == T_DOUBLE) && (dest == T_FLOAT || dest == T_DOUBLE)) {
|
|
1597 |
err = "adapter cannot convert beween floating and fixed-point"; break;
|
|
1598 |
}
|
|
1599 |
break;
|
|
1600 |
case _adapter_ref_to_prim:
|
|
1601 |
if (src != T_OBJECT || !is_java_primitive(dest)
|
|
1602 |
|| argument() != Klass::cast(SystemDictionary::box_klass(dest))->java_mirror()) {
|
|
1603 |
err = "adapter requires primitive dest conversion subfield"; break;
|
|
1604 |
}
|
|
1605 |
break;
|
|
1606 |
case _adapter_prim_to_ref:
|
|
1607 |
if (!is_java_primitive(src) || dest != T_OBJECT
|
|
1608 |
|| argument() != Klass::cast(SystemDictionary::box_klass(src))->java_mirror()) {
|
|
1609 |
err = "adapter requires primitive src conversion subfield"; break;
|
|
1610 |
}
|
|
1611 |
break;
|
|
1612 |
case _adapter_swap_args:
|
|
1613 |
case _adapter_rot_args:
|
|
1614 |
{
|
|
1615 |
if (!src || src != dest) {
|
|
1616 |
err = "adapter requires src/dest conversion subfields for swap"; break;
|
|
1617 |
}
|
|
1618 |
int swap_size = type2size[src];
|
|
1619 |
oop src_mtype = sun_dyn_AdapterMethodHandle::type(target());
|
|
1620 |
oop dest_mtype = sun_dyn_AdapterMethodHandle::type(mh());
|
|
1621 |
int slot_limit = sun_dyn_AdapterMethodHandle::vmslots(src_mtype);
|
|
1622 |
int src_slot = argslot;
|
|
1623 |
int dest_slot = vminfo;
|
|
1624 |
bool rotate_up = (src_slot > dest_slot); // upward rotation
|
|
1625 |
int src_arg = argnum;
|
|
1626 |
int dest_arg = argument_slot_to_argnum(dest_mtype, dest_slot);
|
|
1627 |
verify_vmargslot(mh, dest_arg, dest_slot, CHECK);
|
|
1628 |
if (!(dest_slot >= src_slot + swap_size) &&
|
|
1629 |
!(src_slot >= dest_slot + swap_size)) {
|
|
1630 |
err = "source, destination slots must be distinct";
|
|
1631 |
} else if (ek == _adapter_swap_args && !(src_slot > dest_slot)) {
|
|
1632 |
err = "source of swap must be deeper in stack";
|
|
1633 |
} else if (ek == _adapter_swap_args) {
|
|
1634 |
err = check_argument_type_change(java_dyn_MethodType::ptype(src_mtype, dest_arg),
|
|
1635 |
java_dyn_MethodType::ptype(dest_mtype, src_arg),
|
|
1636 |
dest_arg);
|
|
1637 |
} else if (ek == _adapter_rot_args) {
|
|
1638 |
if (rotate_up) {
|
|
1639 |
assert((src_slot > dest_slot) && (src_arg < dest_arg), "");
|
|
1640 |
// rotate up: [dest_slot..src_slot-ss] --> [dest_slot+ss..src_slot]
|
|
1641 |
// that is: [src_arg+1..dest_arg] --> [src_arg..dest_arg-1]
|
|
1642 |
for (int i = src_arg+1; i <= dest_arg && err == NULL; i++) {
|
|
1643 |
err = check_argument_type_change(java_dyn_MethodType::ptype(src_mtype, i),
|
|
1644 |
java_dyn_MethodType::ptype(dest_mtype, i-1),
|
|
1645 |
i);
|
|
1646 |
}
|
|
1647 |
} else { // rotate down
|
|
1648 |
assert((src_slot < dest_slot) && (src_arg > dest_arg), "");
|
|
1649 |
// rotate down: [src_slot+ss..dest_slot] --> [src_slot..dest_slot-ss]
|
|
1650 |
// that is: [dest_arg..src_arg-1] --> [dst_arg+1..src_arg]
|
|
1651 |
for (int i = dest_arg; i <= src_arg-1 && err == NULL; i++) {
|
|
1652 |
err = check_argument_type_change(java_dyn_MethodType::ptype(src_mtype, i),
|
|
1653 |
java_dyn_MethodType::ptype(dest_mtype, i+1),
|
|
1654 |
i);
|
|
1655 |
}
|
|
1656 |
}
|
|
1657 |
}
|
|
1658 |
if (err == NULL)
|
|
1659 |
err = check_argument_type_change(java_dyn_MethodType::ptype(src_mtype, src_arg),
|
|
1660 |
java_dyn_MethodType::ptype(dest_mtype, dest_arg),
|
|
1661 |
src_arg);
|
|
1662 |
}
|
|
1663 |
break;
|
|
1664 |
case _adapter_collect_args:
|
|
1665 |
case _adapter_spread_args:
|
|
1666 |
{
|
|
1667 |
BasicType coll_type = (ek == _adapter_collect_args) ? dest : src;
|
|
1668 |
BasicType elem_type = (ek == _adapter_collect_args) ? src : dest;
|
|
1669 |
if (coll_type != T_OBJECT || elem_type != T_OBJECT) {
|
|
1670 |
err = "adapter requires src/dest subfields"; break;
|
|
1671 |
// later:
|
|
1672 |
// - consider making coll be a primitive array
|
|
1673 |
// - consider making coll be a heterogeneous collection
|
|
1674 |
}
|
|
1675 |
}
|
|
1676 |
break;
|
|
1677 |
default:
|
|
1678 |
if (src != 0 || dest != 0) {
|
|
1679 |
err = "adapter has spurious src/dest conversion subfields"; break;
|
|
1680 |
}
|
|
1681 |
break;
|
|
1682 |
}
|
|
1683 |
}
|
|
1684 |
|
|
1685 |
if (err == NULL) {
|
|
1686 |
// Check the stack_move subfield.
|
|
1687 |
// It must always report the net change in stack size, positive or negative.
|
|
1688 |
int slots_pushed = stack_move / stack_move_unit();
|
|
1689 |
switch (ek) {
|
|
1690 |
case _adapter_prim_to_prim:
|
|
1691 |
case _adapter_ref_to_prim:
|
|
1692 |
case _adapter_prim_to_ref:
|
|
1693 |
if (slots_pushed != type2size[dest] - type2size[src]) {
|
|
1694 |
err = "wrong stack motion for primitive conversion";
|
|
1695 |
}
|
|
1696 |
break;
|
|
1697 |
case _adapter_dup_args:
|
|
1698 |
if (slots_pushed <= 0) {
|
|
1699 |
err = "adapter requires conversion subfield slots_pushed > 0";
|
|
1700 |
}
|
|
1701 |
break;
|
|
1702 |
case _adapter_drop_args:
|
|
1703 |
if (slots_pushed >= 0) {
|
|
1704 |
err = "adapter requires conversion subfield slots_pushed < 0";
|
|
1705 |
}
|
|
1706 |
break;
|
|
1707 |
case _adapter_collect_args:
|
|
1708 |
if (slots_pushed > 1) {
|
|
1709 |
err = "adapter requires conversion subfield slots_pushed <= 1";
|
|
1710 |
}
|
|
1711 |
break;
|
|
1712 |
case _adapter_spread_args:
|
|
1713 |
if (slots_pushed < -1) {
|
|
1714 |
err = "adapter requires conversion subfield slots_pushed >= -1";
|
|
1715 |
}
|
|
1716 |
break;
|
|
1717 |
default:
|
|
1718 |
if (stack_move != 0) {
|
|
1719 |
err = "adapter has spurious stack_move conversion subfield";
|
|
1720 |
}
|
|
1721 |
break;
|
|
1722 |
}
|
|
1723 |
if (err == NULL && stack_move != slots_pushed * stack_move_unit()) {
|
|
1724 |
err = "stack_move conversion subfield must be multiple of stack_move_unit";
|
|
1725 |
}
|
|
1726 |
}
|
|
1727 |
|
|
1728 |
if (err == NULL) {
|
|
1729 |
// Make sure this adapter does not push too deeply.
|
|
1730 |
int slots_pushed = stack_move / stack_move_unit();
|
|
1731 |
int this_vmslots = java_dyn_MethodHandle::vmslots(mh());
|
|
1732 |
int prev_vmslots = java_dyn_MethodHandle::vmslots(target());
|
|
1733 |
if (slots_pushed != (this_vmslots - prev_vmslots)) {
|
|
1734 |
err = "stack_move inconsistent with previous and current MethodType vmslots";
|
|
1735 |
} else if (slots_pushed > 0) {
|
|
1736 |
// verify stack_move against MethodHandlePushLimit
|
|
1737 |
int prev_pushes = decode_MethodHandle_stack_pushes(target());
|
|
1738 |
// do not blow the stack; use a Java-based adapter if this limit is exceeded
|
|
1739 |
if (slots_pushed + prev_pushes > MethodHandlePushLimit) {
|
|
1740 |
err = "adapter pushes too many parameters";
|
|
1741 |
}
|
|
1742 |
}
|
|
1743 |
|
|
1744 |
// While we're at it, check that the stack motion decoder works:
|
|
1745 |
DEBUG_ONLY(int prev_pushes = decode_MethodHandle_stack_pushes(target()));
|
|
1746 |
DEBUG_ONLY(int this_pushes = decode_MethodHandle_stack_pushes(mh()));
|
|
1747 |
assert(this_pushes == slots_pushed + prev_pushes, "AMH stack motion must be correct");
|
|
1748 |
}
|
|
1749 |
|
|
1750 |
if (err == NULL && vminfo != 0) {
|
|
1751 |
switch (ek) {
|
|
1752 |
case _adapter_swap_args:
|
|
1753 |
case _adapter_rot_args:
|
|
1754 |
break; // OK
|
|
1755 |
default:
|
|
1756 |
err = "vminfo subfield is reserved to the JVM";
|
|
1757 |
}
|
|
1758 |
}
|
|
1759 |
|
|
1760 |
// Do additional ad hoc checks.
|
|
1761 |
if (err == NULL) {
|
|
1762 |
switch (ek) {
|
|
1763 |
case _adapter_retype_only:
|
|
1764 |
err = check_method_type_passthrough(src_mtype(), dst_mtype());
|
|
1765 |
break;
|
|
1766 |
|
|
1767 |
case _adapter_check_cast:
|
|
1768 |
{
|
|
1769 |
// The actual value being checked must be a reference:
|
|
1770 |
err = check_argument_type_change(java_dyn_MethodType::ptype(src_mtype(), argnum),
|
|
1771 |
object_java_mirror(), argnum);
|
|
1772 |
if (err != NULL) break;
|
|
1773 |
|
|
1774 |
// The output of the cast must fit with the destination argument:
|
|
1775 |
Handle cast_class = argument;
|
|
1776 |
err = check_method_type_conversion(src_mtype(),
|
|
1777 |
argnum, cast_class(),
|
|
1778 |
dst_mtype());
|
|
1779 |
}
|
|
1780 |
break;
|
|
1781 |
|
|
1782 |
// %%% TO DO: continue in remaining cases to verify src/dst_mtype if VerifyMethodHandles
|
|
1783 |
}
|
|
1784 |
}
|
|
1785 |
|
|
1786 |
if (err != NULL) {
|
|
1787 |
throw_InternalError_for_bad_conversion(conversion, err, THREAD);
|
|
1788 |
return;
|
|
1789 |
}
|
|
1790 |
|
|
1791 |
}
|
|
1792 |
|
|
1793 |
void MethodHandles::init_AdapterMethodHandle(Handle mh, Handle target, int argnum, TRAPS) {
|
|
1794 |
oop argument = sun_dyn_AdapterMethodHandle::argument(mh());
|
|
1795 |
int argslot = sun_dyn_AdapterMethodHandle::vmargslot(mh());
|
|
1796 |
jint conversion = sun_dyn_AdapterMethodHandle::conversion(mh());
|
|
1797 |
jint conv_op = adapter_conversion_op(conversion);
|
|
1798 |
|
|
1799 |
// adjust the adapter code to the internal EntryKind enumeration:
|
|
1800 |
EntryKind ek_orig = adapter_entry_kind(conv_op);
|
|
1801 |
EntryKind ek_opt = ek_orig; // may be optimized
|
|
1802 |
|
|
1803 |
// Finalize the vmtarget field (Java initialized it to null).
|
|
1804 |
if (!java_dyn_MethodHandle::is_instance(target())) {
|
|
1805 |
throw_InternalError_for_bad_conversion(conversion, "bad target", THREAD);
|
|
1806 |
return;
|
|
1807 |
}
|
|
1808 |
sun_dyn_AdapterMethodHandle::set_vmtarget(mh(), target());
|
|
1809 |
|
|
1810 |
if (VerifyMethodHandles) {
|
|
1811 |
verify_AdapterMethodHandle(mh, argnum, CHECK);
|
|
1812 |
}
|
|
1813 |
|
|
1814 |
int stack_move = adapter_conversion_stack_move(conversion);
|
|
1815 |
BasicType src = adapter_conversion_src_type(conversion);
|
|
1816 |
BasicType dest = adapter_conversion_dest_type(conversion);
|
|
1817 |
int vminfo = adapter_conversion_vminfo(conversion); // should be zero
|
|
1818 |
|
|
1819 |
const char* err = NULL;
|
|
1820 |
|
|
1821 |
// Now it's time to finish the case analysis and pick a MethodHandleEntry.
|
|
1822 |
switch (ek_orig) {
|
|
1823 |
case _adapter_retype_only:
|
|
1824 |
case _adapter_check_cast:
|
|
1825 |
case _adapter_dup_args:
|
|
1826 |
case _adapter_drop_args:
|
|
1827 |
// these work fine via general case code
|
|
1828 |
break;
|
|
1829 |
|
|
1830 |
case _adapter_prim_to_prim:
|
|
1831 |
{
|
|
1832 |
// Non-subword cases are {int,float,long,double} -> {int,float,long,double}.
|
|
1833 |
// And, the {float,double} -> {int,long} cases must be handled by Java.
|
|
1834 |
switch (type2size[src] *4+ type2size[dest]) {
|
|
1835 |
case 1 *4+ 1:
|
|
1836 |
assert(src == T_INT || is_subword_type(src), "source is not float");
|
|
1837 |
// Subword-related cases are int -> {boolean,byte,char,short}.
|
|
1838 |
ek_opt = _adapter_opt_i2i;
|
|
1839 |
vminfo = adapter_subword_vminfo(dest);
|
|
1840 |
break;
|
|
1841 |
case 2 *4+ 1:
|
|
1842 |
if (src == T_LONG && (dest == T_INT || is_subword_type(dest))) {
|
|
1843 |
ek_opt = _adapter_opt_l2i;
|
|
1844 |
vminfo = adapter_subword_vminfo(dest);
|
|
1845 |
} else if (src == T_DOUBLE && dest == T_FLOAT) {
|
|
1846 |
ek_opt = _adapter_opt_d2f;
|
|
1847 |
} else {
|
|
1848 |
assert(false, "");
|
|
1849 |
}
|
|
1850 |
break;
|
|
1851 |
case 1 *4+ 2:
|
|
1852 |
if (src == T_INT && dest == T_LONG) {
|
|
1853 |
ek_opt = _adapter_opt_i2l;
|
|
1854 |
} else if (src == T_FLOAT && dest == T_DOUBLE) {
|
|
1855 |
ek_opt = _adapter_opt_f2d;
|
|
1856 |
} else {
|
|
1857 |
assert(false, "");
|
|
1858 |
}
|
|
1859 |
break;
|
|
1860 |
default:
|
|
1861 |
assert(false, "");
|
|
1862 |
break;
|
|
1863 |
}
|
|
1864 |
}
|
|
1865 |
break;
|
|
1866 |
|
|
1867 |
case _adapter_ref_to_prim:
|
|
1868 |
{
|
|
1869 |
switch (type2size[dest]) {
|
|
1870 |
case 1:
|
|
1871 |
ek_opt = _adapter_opt_unboxi;
|
|
1872 |
vminfo = adapter_subword_vminfo(dest);
|
|
1873 |
break;
|
|
1874 |
case 2:
|
|
1875 |
ek_opt = _adapter_opt_unboxl;
|
|
1876 |
break;
|
|
1877 |
default:
|
|
1878 |
assert(false, "");
|
|
1879 |
break;
|
|
1880 |
}
|
|
1881 |
}
|
|
1882 |
break;
|
|
1883 |
|
|
1884 |
case _adapter_prim_to_ref:
|
|
1885 |
goto throw_not_impl; // allocates, hence could block
|
|
1886 |
|
|
1887 |
case _adapter_swap_args:
|
|
1888 |
case _adapter_rot_args:
|
|
1889 |
{
|
|
1890 |
int swap_slots = type2size[src];
|
|
1891 |
oop mtype = sun_dyn_AdapterMethodHandle::type(mh());
|
|
1892 |
int slot_limit = sun_dyn_AdapterMethodHandle::vmslots(mtype);
|
|
1893 |
int src_slot = argslot;
|
|
1894 |
int dest_slot = vminfo;
|
|
1895 |
int rotate = (ek_orig == _adapter_swap_args) ? 0 : (src_slot > dest_slot) ? 1 : -1;
|
|
1896 |
switch (swap_slots) {
|
|
1897 |
case 1:
|
|
1898 |
ek_opt = (!rotate ? _adapter_opt_swap_1 :
|
|
1899 |
rotate > 0 ? _adapter_opt_rot_1_up : _adapter_opt_rot_1_down);
|
|
1900 |
break;
|
|
1901 |
case 2:
|
|
1902 |
ek_opt = (!rotate ? _adapter_opt_swap_2 :
|
|
1903 |
rotate > 0 ? _adapter_opt_rot_2_up : _adapter_opt_rot_2_down);
|
|
1904 |
break;
|
|
1905 |
default:
|
|
1906 |
assert(false, "");
|
|
1907 |
break;
|
|
1908 |
}
|
|
1909 |
}
|
|
1910 |
break;
|
|
1911 |
|
|
1912 |
case _adapter_collect_args:
|
|
1913 |
goto throw_not_impl; // allocates, hence could block
|
|
1914 |
|
|
1915 |
case _adapter_spread_args:
|
|
1916 |
{
|
|
1917 |
// vminfo will be the required length of the array
|
|
1918 |
int slots_pushed = stack_move / stack_move_unit();
|
|
1919 |
int array_size = slots_pushed + 1;
|
|
1920 |
assert(array_size >= 0, "");
|
|
1921 |
vminfo = array_size;
|
|
1922 |
switch (array_size) {
|
|
1923 |
case 0: ek_opt = _adapter_opt_spread_0; break;
|
|
1924 |
case 1: ek_opt = _adapter_opt_spread_1; break;
|
|
1925 |
default: ek_opt = _adapter_opt_spread_more; break;
|
|
1926 |
}
|
|
1927 |
if ((vminfo & CONV_VMINFO_MASK) != vminfo)
|
|
1928 |
goto throw_not_impl; // overflow
|
|
1929 |
}
|
|
1930 |
break;
|
|
1931 |
|
|
1932 |
case _adapter_flyby:
|
|
1933 |
case _adapter_ricochet:
|
|
1934 |
goto throw_not_impl; // runs Java code, hence could block
|
|
1935 |
|
|
1936 |
default:
|
|
1937 |
// should have failed much earlier; must be a missing case here
|
|
1938 |
assert(false, "incomplete switch");
|
|
1939 |
// and fall through:
|
|
1940 |
|
|
1941 |
throw_not_impl:
|
|
1942 |
// FIXME: these adapters are NYI
|
|
1943 |
err = "adapter not yet implemented in the JVM";
|
|
1944 |
break;
|
|
1945 |
}
|
|
1946 |
|
|
1947 |
if (err != NULL) {
|
|
1948 |
throw_InternalError_for_bad_conversion(conversion, err, THREAD);
|
|
1949 |
return;
|
|
1950 |
}
|
|
1951 |
|
|
1952 |
// Rebuild the conversion value; maybe parts of it were changed.
|
|
1953 |
jint new_conversion = adapter_conversion(conv_op, src, dest, stack_move, vminfo);
|
|
1954 |
|
|
1955 |
// Finalize the conversion field. (Note that it is final to Java code.)
|
|
1956 |
sun_dyn_AdapterMethodHandle::set_conversion(mh(), new_conversion);
|
|
1957 |
|
|
1958 |
// Done!
|
|
1959 |
java_dyn_MethodHandle::set_vmentry(mh(), entry(ek_opt));
|
|
1960 |
|
|
1961 |
// There should be enough memory barriers on exit from native methods
|
|
1962 |
// to ensure that the MH is fully initialized to all threads before
|
|
1963 |
// Java code can publish it in global data structures.
|
|
1964 |
}
|
|
1965 |
|
|
1966 |
//
|
|
1967 |
// Here are the native methods on sun.dyn.MethodHandleImpl.
|
|
1968 |
// They are the private interface between this JVM and the HotSpot-specific
|
|
1969 |
// Java code that implements JSR 292 method handles.
|
|
1970 |
//
|
|
1971 |
// Note: We use a JVM_ENTRY macro to define each of these, for this is the way
|
|
1972 |
// that intrinsic (non-JNI) native methods are defined in HotSpot.
|
|
1973 |
//
|
|
1974 |
|
|
1975 |
// direct method handles for invokestatic or invokespecial
|
|
1976 |
// void init(DirectMethodHandle self, MemberName ref, boolean doDispatch, Class<?> caller);
|
|
1977 |
JVM_ENTRY(void, MHI_init_DMH(JNIEnv *env, jobject igcls, jobject mh_jh,
|
|
1978 |
jobject target_jh, jboolean do_dispatch, jobject caller_jh)) {
|
|
1979 |
ResourceMark rm; // for error messages
|
|
1980 |
|
|
1981 |
// This is the guy we are initializing:
|
|
1982 |
if (mh_jh == NULL) { THROW(vmSymbols::java_lang_InternalError()); }
|
|
1983 |
Handle mh(THREAD, JNIHandles::resolve_non_null(mh_jh));
|
|
1984 |
|
|
1985 |
// Early returns out of this method leave the DMH in an unfinished state.
|
|
1986 |
assert(java_dyn_MethodHandle::vmentry(mh()) == NULL, "must be safely null");
|
|
1987 |
|
|
1988 |
// which method are we really talking about?
|
|
1989 |
if (target_jh == NULL) { THROW(vmSymbols::java_lang_InternalError()); }
|
|
1990 |
oop target_oop = JNIHandles::resolve_non_null(target_jh);
|
|
1991 |
if (sun_dyn_MemberName::is_instance(target_oop) &&
|
|
1992 |
sun_dyn_MemberName::vmindex(target_oop) == VM_INDEX_UNINITIALIZED) {
|
|
1993 |
Handle mname(THREAD, target_oop);
|
|
1994 |
MethodHandles::resolve_MemberName(mname, CHECK);
|
|
1995 |
target_oop = mname(); // in case of GC
|
|
1996 |
}
|
|
1997 |
|
|
1998 |
int decode_flags = 0; klassOop receiver_limit = NULL;
|
|
1999 |
methodHandle m(THREAD,
|
|
2000 |
MethodHandles::decode_method(target_oop,
|
|
2001 |
receiver_limit, decode_flags));
|
|
2002 |
if (m.is_null()) { THROW_MSG(vmSymbols::java_lang_InternalError(), "no such method"); }
|
|
2003 |
|
|
2004 |
// The trusted Java code that calls this method should already have performed
|
|
2005 |
// access checks on behalf of the given caller. But, we can verify this.
|
|
2006 |
if (VerifyMethodHandles && caller_jh != NULL) {
|
|
2007 |
KlassHandle caller(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(caller_jh)));
|
|
2008 |
// If this were a bytecode, the first access check would be against
|
|
2009 |
// the "reference class" mentioned in the CONSTANT_Methodref.
|
|
2010 |
// For that class, we use the defining class of m,
|
|
2011 |
// or a more specific receiver limit if available.
|
|
2012 |
klassOop reference_klass = m->method_holder(); // OK approximation
|
|
2013 |
if (receiver_limit != NULL && receiver_limit != reference_klass) {
|
|
2014 |
if (!Klass::cast(receiver_limit)->is_subtype_of(reference_klass))
|
|
2015 |
THROW_MSG(vmSymbols::java_lang_InternalError(), "receiver limit out of bounds"); // Java code bug
|
|
2016 |
reference_klass = receiver_limit;
|
|
2017 |
}
|
|
2018 |
// Emulate LinkResolver::check_klass_accessability.
|
|
2019 |
if (!Reflection::verify_class_access(caller->as_klassOop(),
|
|
2020 |
reference_klass,
|
|
2021 |
true)) {
|
|
2022 |
THROW_MSG(vmSymbols::java_lang_InternalError(), Klass::cast(m->method_holder())->external_name());
|
|
2023 |
}
|
|
2024 |
// If there were a bytecode, the next step would be to lookup the method
|
|
2025 |
// in the reference class, then then check the method's access bits.
|
|
2026 |
// Emulate LinkResolver::check_method_accessability.
|
|
2027 |
klassOop resolved_klass = m->method_holder();
|
|
2028 |
if (!Reflection::verify_field_access(caller->as_klassOop(),
|
|
2029 |
resolved_klass, reference_klass,
|
|
2030 |
m->access_flags(),
|
|
2031 |
true)) {
|
|
2032 |
// %%% following cutout belongs in Reflection::verify_field_access?
|
|
2033 |
bool same_pm = Reflection::is_same_package_member(caller->as_klassOop(),
|
|
2034 |
reference_klass, THREAD);
|
|
2035 |
if (!same_pm) {
|
|
2036 |
THROW_MSG(vmSymbols::java_lang_InternalError(), m->name_and_sig_as_C_string());
|
|
2037 |
}
|
|
2038 |
}
|
|
2039 |
}
|
|
2040 |
|
|
2041 |
MethodHandles::init_DirectMethodHandle(mh, m, (do_dispatch != JNI_FALSE), CHECK);
|
|
2042 |
}
|
|
2043 |
JVM_END
|
|
2044 |
|
|
2045 |
// bound method handles
|
|
2046 |
JVM_ENTRY(void, MHI_init_BMH(JNIEnv *env, jobject igcls, jobject mh_jh,
|
|
2047 |
jobject target_jh, int argnum)) {
|
|
2048 |
ResourceMark rm; // for error messages
|
|
2049 |
|
|
2050 |
// This is the guy we are initializing:
|
|
2051 |
if (mh_jh == NULL) { THROW(vmSymbols::java_lang_InternalError()); }
|
|
2052 |
Handle mh(THREAD, JNIHandles::resolve_non_null(mh_jh));
|
|
2053 |
|
|
2054 |
// Early returns out of this method leave the BMH in an unfinished state.
|
|
2055 |
assert(java_dyn_MethodHandle::vmentry(mh()) == NULL, "must be safely null");
|
|
2056 |
|
|
2057 |
if (target_jh == NULL) { THROW(vmSymbols::java_lang_InternalError()); }
|
|
2058 |
Handle target(THREAD, JNIHandles::resolve_non_null(target_jh));
|
|
2059 |
|
|
2060 |
if (!java_dyn_MethodHandle::is_instance(target())) {
|
|
2061 |
// Target object is a reflective method. (%%% Do we need this alternate path?)
|
|
2062 |
Untested("init_BMH of non-MH");
|
|
2063 |
if (argnum != 0) { THROW(vmSymbols::java_lang_InternalError()); }
|
|
2064 |
int decode_flags = 0; klassOop receiver_limit_oop = NULL;
|
|
2065 |
methodHandle m(THREAD,
|
|
2066 |
MethodHandles::decode_method(target(),
|
|
2067 |
receiver_limit_oop,
|
|
2068 |
decode_flags));
|
|
2069 |
KlassHandle receiver_limit(THREAD, receiver_limit_oop);
|
|
2070 |
MethodHandles::init_BoundMethodHandle_with_receiver(mh, m,
|
|
2071 |
receiver_limit,
|
|
2072 |
decode_flags,
|
|
2073 |
CHECK);
|
|
2074 |
return;
|
|
2075 |
}
|
|
2076 |
|
|
2077 |
// Build a BMH on top of a DMH or another BMH:
|
|
2078 |
MethodHandles::init_BoundMethodHandle(mh, target, argnum, CHECK);
|
|
2079 |
}
|
|
2080 |
JVM_END
|
|
2081 |
|
|
2082 |
// adapter method handles
|
|
2083 |
JVM_ENTRY(void, MHI_init_AMH(JNIEnv *env, jobject igcls, jobject mh_jh,
|
|
2084 |
jobject target_jh, int argnum)) {
|
|
2085 |
// This is the guy we are initializing:
|
|
2086 |
if (mh_jh == NULL || target_jh == NULL) {
|
|
2087 |
THROW(vmSymbols::java_lang_InternalError());
|
|
2088 |
}
|
|
2089 |
Handle mh(THREAD, JNIHandles::resolve_non_null(mh_jh));
|
|
2090 |
Handle target(THREAD, JNIHandles::resolve_non_null(target_jh));
|
|
2091 |
|
|
2092 |
// Early returns out of this method leave the AMH in an unfinished state.
|
|
2093 |
assert(java_dyn_MethodHandle::vmentry(mh()) == NULL, "must be safely null");
|
|
2094 |
|
|
2095 |
MethodHandles::init_AdapterMethodHandle(mh, target, argnum, CHECK);
|
|
2096 |
}
|
|
2097 |
JVM_END
|
|
2098 |
|
|
2099 |
// method type forms
|
|
2100 |
JVM_ENTRY(void, MHI_init_MT(JNIEnv *env, jobject igcls, jobject erased_jh)) {
|
|
2101 |
if (erased_jh == NULL) return;
|
|
2102 |
if (TraceMethodHandles) {
|
|
2103 |
tty->print("creating MethodType form ");
|
|
2104 |
if (WizardMode || Verbose) { // Warning: this calls Java code on the MH!
|
|
2105 |
// call Object.toString()
|
|
2106 |
symbolOop name = vmSymbols::toString_name(), sig = vmSymbols::void_string_signature();
|
|
2107 |
JavaCallArguments args(Handle(THREAD, JNIHandles::resolve_non_null(erased_jh)));
|
|
2108 |
JavaValue result(T_OBJECT);
|
|
2109 |
JavaCalls::call_virtual(&result, SystemDictionary::object_klass(), name, sig,
|
|
2110 |
&args, CHECK);
|
|
2111 |
Handle str(THREAD, (oop)result.get_jobject());
|
|
2112 |
java_lang_String::print(str, tty);
|
|
2113 |
}
|
|
2114 |
tty->cr();
|
|
2115 |
}
|
|
2116 |
}
|
|
2117 |
JVM_END
|
|
2118 |
|
|
2119 |
// debugging and reflection
|
|
2120 |
JVM_ENTRY(jobject, MHI_getTarget(JNIEnv *env, jobject igcls, jobject mh_jh, jint format)) {
|
|
2121 |
Handle mh(THREAD, JNIHandles::resolve(mh_jh));
|
|
2122 |
if (!java_dyn_MethodHandle::is_instance(mh())) {
|
|
2123 |
THROW_NULL(vmSymbols::java_lang_IllegalArgumentException());
|
|
2124 |
}
|
|
2125 |
oop target = MethodHandles::encode_target(mh, format, CHECK_NULL);
|
|
2126 |
return JNIHandles::make_local(THREAD, target);
|
|
2127 |
}
|
|
2128 |
JVM_END
|
|
2129 |
|
|
2130 |
JVM_ENTRY(jint, MHI_getConstant(JNIEnv *env, jobject igcls, jint which)) {
|
|
2131 |
switch (which) {
|
|
2132 |
case MethodHandles::GC_JVM_PUSH_LIMIT:
|
|
2133 |
guarantee(MethodHandlePushLimit >= 2 && MethodHandlePushLimit <= 0xFF,
|
|
2134 |
"MethodHandlePushLimit parameter must be in valid range");
|
|
2135 |
return MethodHandlePushLimit;
|
|
2136 |
case MethodHandles::GC_JVM_STACK_MOVE_LIMIT:
|
|
2137 |
// return number of words per slot, signed according to stack direction
|
|
2138 |
return MethodHandles::stack_move_unit();
|
|
2139 |
}
|
|
2140 |
return 0;
|
|
2141 |
}
|
|
2142 |
JVM_END
|
|
2143 |
|
|
2144 |
#ifndef PRODUCT
|
|
2145 |
#define EACH_NAMED_CON(template) \
|
|
2146 |
template(MethodHandles,GC_JVM_PUSH_LIMIT) \
|
|
2147 |
template(MethodHandles,GC_JVM_STACK_MOVE_LIMIT) \
|
|
2148 |
template(MethodHandles,ETF_HANDLE_OR_METHOD_NAME) \
|
|
2149 |
template(MethodHandles,ETF_DIRECT_HANDLE) \
|
|
2150 |
template(MethodHandles,ETF_METHOD_NAME) \
|
|
2151 |
template(MethodHandles,ETF_REFLECT_METHOD) \
|
|
2152 |
template(sun_dyn_MemberName,MN_IS_METHOD) \
|
|
2153 |
template(sun_dyn_MemberName,MN_IS_CONSTRUCTOR) \
|
|
2154 |
template(sun_dyn_MemberName,MN_IS_FIELD) \
|
|
2155 |
template(sun_dyn_MemberName,MN_IS_TYPE) \
|
|
2156 |
template(sun_dyn_MemberName,MN_SEARCH_SUPERCLASSES) \
|
|
2157 |
template(sun_dyn_MemberName,MN_SEARCH_INTERFACES) \
|
|
2158 |
template(sun_dyn_MemberName,VM_INDEX_UNINITIALIZED) \
|
|
2159 |
template(sun_dyn_AdapterMethodHandle,OP_RETYPE_ONLY) \
|
|
2160 |
template(sun_dyn_AdapterMethodHandle,OP_CHECK_CAST) \
|
|
2161 |
template(sun_dyn_AdapterMethodHandle,OP_PRIM_TO_PRIM) \
|
|
2162 |
template(sun_dyn_AdapterMethodHandle,OP_REF_TO_PRIM) \
|
|
2163 |
template(sun_dyn_AdapterMethodHandle,OP_PRIM_TO_REF) \
|
|
2164 |
template(sun_dyn_AdapterMethodHandle,OP_SWAP_ARGS) \
|
|
2165 |
template(sun_dyn_AdapterMethodHandle,OP_ROT_ARGS) \
|
|
2166 |
template(sun_dyn_AdapterMethodHandle,OP_DUP_ARGS) \
|
|
2167 |
template(sun_dyn_AdapterMethodHandle,OP_DROP_ARGS) \
|
|
2168 |
template(sun_dyn_AdapterMethodHandle,OP_COLLECT_ARGS) \
|
|
2169 |
template(sun_dyn_AdapterMethodHandle,OP_SPREAD_ARGS) \
|
|
2170 |
template(sun_dyn_AdapterMethodHandle,OP_FLYBY) \
|
|
2171 |
template(sun_dyn_AdapterMethodHandle,OP_RICOCHET) \
|
|
2172 |
template(sun_dyn_AdapterMethodHandle,CONV_OP_LIMIT) \
|
|
2173 |
template(sun_dyn_AdapterMethodHandle,CONV_OP_MASK) \
|
|
2174 |
template(sun_dyn_AdapterMethodHandle,CONV_VMINFO_MASK) \
|
|
2175 |
template(sun_dyn_AdapterMethodHandle,CONV_VMINFO_SHIFT) \
|
|
2176 |
template(sun_dyn_AdapterMethodHandle,CONV_OP_SHIFT) \
|
|
2177 |
template(sun_dyn_AdapterMethodHandle,CONV_DEST_TYPE_SHIFT) \
|
|
2178 |
template(sun_dyn_AdapterMethodHandle,CONV_SRC_TYPE_SHIFT) \
|
|
2179 |
template(sun_dyn_AdapterMethodHandle,CONV_STACK_MOVE_SHIFT) \
|
|
2180 |
template(sun_dyn_AdapterMethodHandle,CONV_STACK_MOVE_MASK) \
|
|
2181 |
/*end*/
|
|
2182 |
|
|
2183 |
#define ONE_PLUS(scope,value) 1+
|
|
2184 |
static const int con_value_count = EACH_NAMED_CON(ONE_PLUS) 0;
|
|
2185 |
#define VALUE_COMMA(scope,value) scope::value,
|
|
2186 |
static const int con_values[con_value_count+1] = { EACH_NAMED_CON(VALUE_COMMA) 0 };
|
|
2187 |
#define STRING_NULL(scope,value) #value "\0"
|
|
2188 |
static const char con_names[] = { EACH_NAMED_CON(STRING_NULL) };
|
|
2189 |
|
|
2190 |
#undef ONE_PLUS
|
|
2191 |
#undef VALUE_COMMA
|
|
2192 |
#undef STRING_NULL
|
|
2193 |
#undef EACH_NAMED_CON
|
|
2194 |
#endif
|
|
2195 |
|
|
2196 |
JVM_ENTRY(jint, MHI_getNamedCon(JNIEnv *env, jobject igcls, jint which, jobjectArray box_jh)) {
|
|
2197 |
#ifndef PRODUCT
|
|
2198 |
if (which >= 0 && which < con_value_count) {
|
|
2199 |
int con = con_values[which];
|
|
2200 |
objArrayOop box = (objArrayOop) JNIHandles::resolve(box_jh);
|
|
2201 |
if (box != NULL && box->klass() == Universe::objectArrayKlassObj() && box->length() > 0) {
|
|
2202 |
const char* str = &con_names[0];
|
|
2203 |
for (int i = 0; i < which; i++)
|
|
2204 |
str += strlen(str) + 1; // skip name and null
|
|
2205 |
oop name = java_lang_String::create_oop_from_str(str, CHECK_0);
|
|
2206 |
box->obj_at_put(0, name);
|
|
2207 |
}
|
|
2208 |
return con;
|
|
2209 |
}
|
|
2210 |
#endif
|
|
2211 |
return 0;
|
|
2212 |
}
|
|
2213 |
JVM_END
|
|
2214 |
|
|
2215 |
// void init(MemberName self, AccessibleObject ref)
|
|
2216 |
JVM_ENTRY(void, MHI_init_Mem(JNIEnv *env, jobject igcls, jobject mname_jh, jobject target_jh)) {
|
|
2217 |
if (mname_jh == NULL || target_jh == NULL) { THROW(vmSymbols::java_lang_InternalError()); }
|
|
2218 |
Handle mname(THREAD, JNIHandles::resolve_non_null(mname_jh));
|
|
2219 |
oop target_oop = JNIHandles::resolve_non_null(target_jh);
|
|
2220 |
MethodHandles::init_MemberName(mname(), target_oop);
|
|
2221 |
}
|
|
2222 |
JVM_END
|
|
2223 |
|
|
2224 |
// void expand(MemberName self)
|
|
2225 |
JVM_ENTRY(void, MHI_expand_Mem(JNIEnv *env, jobject igcls, jobject mname_jh)) {
|
|
2226 |
if (mname_jh == NULL) { THROW(vmSymbols::java_lang_InternalError()); }
|
|
2227 |
Handle mname(THREAD, JNIHandles::resolve_non_null(mname_jh));
|
|
2228 |
MethodHandles::expand_MemberName(mname, 0, CHECK);
|
|
2229 |
}
|
|
2230 |
JVM_END
|
|
2231 |
|
|
2232 |
// void resolve(MemberName self, Class<?> caller)
|
|
2233 |
JVM_ENTRY(void, MHI_resolve_Mem(JNIEnv *env, jobject igcls, jobject mname_jh, jclass caller_jh)) {
|
|
2234 |
if (mname_jh == NULL) { THROW(vmSymbols::java_lang_InternalError()); }
|
|
2235 |
Handle mname(THREAD, JNIHandles::resolve_non_null(mname_jh));
|
|
2236 |
// %%% take caller into account!
|
|
2237 |
MethodHandles::resolve_MemberName(mname, CHECK);
|
|
2238 |
}
|
|
2239 |
JVM_END
|
|
2240 |
|
|
2241 |
// static native int getMembers(Class<?> defc, String matchName, String matchSig,
|
|
2242 |
// int matchFlags, Class<?> caller, int skip, MemberName[] results);
|
|
2243 |
JVM_ENTRY(jint, MHI_getMembers(JNIEnv *env, jobject igcls,
|
|
2244 |
jclass clazz_jh, jstring name_jh, jstring sig_jh,
|
|
2245 |
int mflags, jclass caller_jh, jint skip, jobjectArray results_jh)) {
|
|
2246 |
if (clazz_jh == NULL || results_jh == NULL) return -1;
|
|
2247 |
klassOop k_oop = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(clazz_jh));
|
|
2248 |
|
|
2249 |
objArrayOop results = (objArrayOop) JNIHandles::resolve(results_jh);
|
|
2250 |
if (results == NULL || !results->is_objArray()) return -1;
|
|
2251 |
|
|
2252 |
symbolOop name = NULL, sig = NULL;
|
|
2253 |
if (name_jh != NULL) {
|
|
2254 |
name = java_lang_String::as_symbol_or_null(JNIHandles::resolve_non_null(name_jh));
|
|
2255 |
if (name == NULL) return 0; // a match is not possible
|
|
2256 |
}
|
|
2257 |
if (sig_jh != NULL) {
|
|
2258 |
sig = java_lang_String::as_symbol_or_null(JNIHandles::resolve_non_null(sig_jh));
|
|
2259 |
if (sig == NULL) return 0; // a match is not possible
|
|
2260 |
}
|
|
2261 |
|
|
2262 |
klassOop caller = NULL;
|
|
2263 |
if (caller_jh != NULL) {
|
|
2264 |
oop caller_oop = JNIHandles::resolve_non_null(caller_jh);
|
|
2265 |
if (!java_lang_Class::is_instance(caller_oop)) return -1;
|
|
2266 |
caller = java_lang_Class::as_klassOop(caller_oop);
|
|
2267 |
}
|
|
2268 |
|
|
2269 |
if (name != NULL && sig != NULL && results != NULL) {
|
|
2270 |
// try a direct resolve
|
|
2271 |
// %%% TO DO
|
|
2272 |
}
|
|
2273 |
|
|
2274 |
int res = MethodHandles::find_MemberNames(k_oop, name, sig, mflags,
|
|
2275 |
caller, skip, results);
|
|
2276 |
// TO DO: expand at least some of the MemberNames, to avoid massive callbacks
|
|
2277 |
return res;
|
|
2278 |
}
|
|
2279 |
JVM_END
|
|
2280 |
|
|
2281 |
|
|
2282 |
/// JVM_RegisterMethodHandleMethods
|
|
2283 |
|
|
2284 |
#define ADR "J"
|
|
2285 |
|
|
2286 |
#define LANG "Ljava/lang/"
|
|
2287 |
#define JDYN "Ljava/dyn/"
|
|
2288 |
#define IDYN "Lsun/dyn/"
|
|
2289 |
|
|
2290 |
#define OBJ LANG"Object;"
|
|
2291 |
#define CLS LANG"Class;"
|
|
2292 |
#define STRG LANG"String;"
|
|
2293 |
#define MT JDYN"MethodType;"
|
|
2294 |
#define MH JDYN"MethodHandle;"
|
|
2295 |
#define MHI IDYN"MethodHandleImpl;"
|
|
2296 |
#define MEM IDYN"MemberName;"
|
|
2297 |
#define AMH IDYN"AdapterMethodHandle;"
|
|
2298 |
#define BMH IDYN"BoundMethodHandle;"
|
|
2299 |
#define DMH IDYN"DirectMethodHandle;"
|
|
2300 |
|
|
2301 |
#define CC (char*) /*cast a literal from (const char*)*/
|
|
2302 |
#define FN_PTR(f) CAST_FROM_FN_PTR(void*, &f)
|
|
2303 |
|
|
2304 |
// These are the native methods on sun.dyn.MethodHandleNatives.
|
|
2305 |
static JNINativeMethod methods[] = {
|
|
2306 |
// void init(MemberName self, AccessibleObject ref)
|
|
2307 |
{CC"init", CC"("AMH""MH"I)V", FN_PTR(MHI_init_AMH)},
|
|
2308 |
{CC"init", CC"("BMH""OBJ"I)V", FN_PTR(MHI_init_BMH)},
|
|
2309 |
{CC"init", CC"("DMH""OBJ"Z"CLS")V", FN_PTR(MHI_init_DMH)},
|
|
2310 |
{CC"init", CC"("MT")V", FN_PTR(MHI_init_MT)},
|
|
2311 |
{CC"init", CC"("MEM""OBJ")V", FN_PTR(MHI_init_Mem)},
|
|
2312 |
{CC"expand", CC"("MEM")V", FN_PTR(MHI_expand_Mem)},
|
|
2313 |
{CC"resolve", CC"("MEM""CLS")V", FN_PTR(MHI_resolve_Mem)},
|
|
2314 |
{CC"getTarget", CC"("MH"I)"OBJ, FN_PTR(MHI_getTarget)},
|
|
2315 |
{CC"getConstant", CC"(I)I", FN_PTR(MHI_getConstant)},
|
|
2316 |
// static native int getNamedCon(int which, Object[] name)
|
|
2317 |
{CC"getNamedCon", CC"(I["OBJ")I", FN_PTR(MHI_getNamedCon)},
|
|
2318 |
// static native int getMembers(Class<?> defc, String matchName, String matchSig,
|
|
2319 |
// int matchFlags, Class<?> caller, int skip, MemberName[] results);
|
|
2320 |
{CC"getMembers", CC"("CLS""STRG""STRG"I"CLS"I["MEM")I", FN_PTR(MHI_getMembers)}
|
|
2321 |
};
|
|
2322 |
|
|
2323 |
|
|
2324 |
// This one function is exported, used by NativeLookup.
|
|
2325 |
|
|
2326 |
JVM_ENTRY(void, JVM_RegisterMethodHandleMethods(JNIEnv *env, jclass MHN_class)) {
|
|
2327 |
assert(MethodHandles::spot_check_entry_names(), "entry enum is OK");
|
|
2328 |
|
|
2329 |
if (!EnableMethodHandles) {
|
|
2330 |
warning("JSR 292 method handles are disabled in this JVM. Use -XX:+EnableMethodHandles to enable.");
|
|
2331 |
return; // bind nothing
|
|
2332 |
}
|
|
2333 |
|
|
2334 |
{
|
|
2335 |
ThreadToNativeFromVM ttnfv(thread);
|
|
2336 |
|
|
2337 |
int status = env->RegisterNatives(MHN_class, methods, sizeof(methods)/sizeof(JNINativeMethod));
|
|
2338 |
if (env->ExceptionOccurred()) {
|
|
2339 |
MethodHandles::set_enabled(false);
|
|
2340 |
warning("JSR 292 method handle code is mismatched to this JVM. Disabling support.");
|
|
2341 |
env->ExceptionClear();
|
|
2342 |
} else {
|
|
2343 |
MethodHandles::set_enabled(true);
|
|
2344 |
}
|
|
2345 |
}
|
|
2346 |
}
|
|
2347 |
JVM_END
|