1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/share/vm/prims/methodHandleWalk.cpp Mon Jan 04 15:52:40 2010 +0100
1.3 @@ -0,0 +1,805 @@
1.4 +/*
1.5 + * Copyright 2008-2010 Sun Microsystems, Inc. All Rights Reserved.
1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 + *
1.8 + * This code is free software; you can redistribute it and/or modify it
1.9 + * under the terms of the GNU General Public License version 2 only, as
1.10 + * published by the Free Software Foundation.
1.11 + *
1.12 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.13 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.14 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.15 + * version 2 for more details (a copy is included in the LICENSE file that
1.16 + * accompanied this code).
1.17 + *
1.18 + * You should have received a copy of the GNU General Public License version
1.19 + * 2 along with this work; if not, write to the Free Software Foundation,
1.20 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.21 + *
1.22 + * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
1.23 + * CA 95054 USA or visit www.sun.com if you need additional information or
1.24 + * have any questions.
1.25 + *
1.26 + */
1.27 +
1.28 +/*
1.29 + * JSR 292 reference implementation: method handle structure analysis
1.30 + */
1.31 +
1.32 +#include "incls/_precompiled.incl"
1.33 +#include "incls/_methodHandleWalk.cpp.incl"
1.34 +
1.35 +void MethodHandleChain::set_method_handle(Handle mh, TRAPS) {
1.36 + if (!java_dyn_MethodHandle::is_instance(mh())) lose("bad method handle", CHECK);
1.37 +
1.38 + // set current method handle and unpack partially
1.39 + _method_handle = mh;
1.40 + _is_last = false;
1.41 + _is_bound = false;
1.42 + _arg_slot = -1;
1.43 + _arg_type = T_VOID;
1.44 + _conversion = -1;
1.45 + _last_invoke = Bytecodes::_nop; //arbitrary non-garbage
1.46 +
1.47 + if (sun_dyn_DirectMethodHandle::is_instance(mh())) {
1.48 + set_last_method(mh(), THREAD);
1.49 + return;
1.50 + }
1.51 + if (sun_dyn_AdapterMethodHandle::is_instance(mh())) {
1.52 + _conversion = AdapterMethodHandle_conversion();
1.53 + assert(_conversion != -1, "bad conv value");
1.54 + assert(sun_dyn_BoundMethodHandle::is_instance(mh()), "also BMH");
1.55 + }
1.56 + if (sun_dyn_BoundMethodHandle::is_instance(mh())) {
1.57 + if (!is_adapter()) // keep AMH and BMH separate in this model
1.58 + _is_bound = true;
1.59 + _arg_slot = BoundMethodHandle_vmargslot();
1.60 + oop target = MethodHandle_vmtarget_oop();
1.61 + if (!is_bound() || java_dyn_MethodHandle::is_instance(target)) {
1.62 + _arg_type = compute_bound_arg_type(target, NULL, _arg_slot, CHECK);
1.63 + } else if (target != NULL && target->is_method()) {
1.64 + _arg_type = compute_bound_arg_type(NULL, (methodOop)target, _arg_slot, CHECK);
1.65 + set_last_method(mh(), CHECK);
1.66 + } else {
1.67 + _is_bound = false; // lose!
1.68 + }
1.69 + }
1.70 + if (is_bound() && _arg_type == T_VOID) {
1.71 + lose("bad vmargslot", CHECK);
1.72 + }
1.73 + if (!is_bound() && !is_adapter()) {
1.74 + lose("unrecognized MH type", CHECK);
1.75 + }
1.76 +}
1.77 +
1.78 +void MethodHandleChain::set_last_method(oop target, TRAPS) {
1.79 + _is_last = true;
1.80 + klassOop receiver_limit_oop = NULL;
1.81 + int flags = 0;
1.82 + methodOop m = MethodHandles::decode_method(target, receiver_limit_oop, flags);
1.83 + _last_method = methodHandle(THREAD, m);
1.84 + if ((flags & MethodHandles::_dmf_has_receiver) == 0)
1.85 + _last_invoke = Bytecodes::_invokestatic;
1.86 + else if ((flags & MethodHandles::_dmf_does_dispatch) == 0)
1.87 + _last_invoke = Bytecodes::_invokespecial;
1.88 + else if ((flags & MethodHandles::_dmf_from_interface) != 0)
1.89 + _last_invoke = Bytecodes::_invokeinterface;
1.90 + else
1.91 + _last_invoke = Bytecodes::_invokevirtual;
1.92 +}
1.93 +
1.94 +BasicType MethodHandleChain::compute_bound_arg_type(oop target, methodOop m, int arg_slot, TRAPS) {
1.95 + // There is no direct indication of whether the argument is primitive or not.
1.96 + // It is implied by the _vmentry code, and by the MethodType of the target.
1.97 + // FIXME: Make it explicit MethodHandleImpl refactors out from MethodHandle
1.98 + BasicType arg_type = T_VOID;
1.99 + if (target != NULL) {
1.100 + oop mtype = java_dyn_MethodHandle::type(target);
1.101 + int arg_num = MethodHandles::argument_slot_to_argnum(mtype, arg_slot);
1.102 + if (arg_num >= 0) {
1.103 + oop ptype = java_dyn_MethodType::ptype(mtype, arg_num);
1.104 + arg_type = java_lang_Class::as_BasicType(ptype);
1.105 + }
1.106 + } else if (m != NULL) {
1.107 + // figure out the argument type from the slot
1.108 + // FIXME: make this explicit in the MH
1.109 + int cur_slot = m->size_of_parameters();
1.110 + if (arg_slot >= cur_slot)
1.111 + return T_VOID;
1.112 + if (!m->is_static()) {
1.113 + cur_slot -= type2size[T_OBJECT];
1.114 + if (cur_slot == arg_slot)
1.115 + return T_OBJECT;
1.116 + }
1.117 + for (SignatureStream ss(m->signature()); !ss.is_done(); ss.next()) {
1.118 + BasicType bt = ss.type();
1.119 + cur_slot -= type2size[bt];
1.120 + if (cur_slot <= arg_slot) {
1.121 + if (cur_slot == arg_slot)
1.122 + arg_type = bt;
1.123 + break;
1.124 + }
1.125 + }
1.126 + }
1.127 + if (arg_type == T_ARRAY)
1.128 + arg_type = T_OBJECT;
1.129 + return arg_type;
1.130 +}
1.131 +
1.132 +void MethodHandleChain::lose(const char* msg, TRAPS) {
1.133 + _lose_message = msg;
1.134 + if (!THREAD->is_Java_thread() || ((JavaThread*)THREAD)->thread_state() != _thread_in_vm) {
1.135 + // throw a preallocated exception
1.136 + THROW_OOP(Universe::virtual_machine_error_instance());
1.137 + }
1.138 + THROW_MSG(vmSymbols::java_lang_InternalError(), msg);
1.139 +}
1.140 +
1.141 +Bytecodes::Code MethodHandleWalker::conversion_code(BasicType src, BasicType dest) {
1.142 + if (is_subword_type(src)) {
1.143 + src = T_INT; // all subword src types act like int
1.144 + }
1.145 + if (src == dest) {
1.146 + return Bytecodes::_nop;
1.147 + }
1.148 +
1.149 +#define SRC_DEST(s,d) (((int)(s) << 4) + (int)(d))
1.150 + switch (SRC_DEST(src, dest)) {
1.151 + case SRC_DEST(T_INT, T_LONG): return Bytecodes::_i2l;
1.152 + case SRC_DEST(T_INT, T_FLOAT): return Bytecodes::_i2f;
1.153 + case SRC_DEST(T_INT, T_DOUBLE): return Bytecodes::_i2d;
1.154 + case SRC_DEST(T_INT, T_BYTE): return Bytecodes::_i2b;
1.155 + case SRC_DEST(T_INT, T_CHAR): return Bytecodes::_i2c;
1.156 + case SRC_DEST(T_INT, T_SHORT): return Bytecodes::_i2s;
1.157 +
1.158 + case SRC_DEST(T_LONG, T_INT): return Bytecodes::_l2i;
1.159 + case SRC_DEST(T_LONG, T_FLOAT): return Bytecodes::_l2f;
1.160 + case SRC_DEST(T_LONG, T_DOUBLE): return Bytecodes::_l2d;
1.161 +
1.162 + case SRC_DEST(T_FLOAT, T_INT): return Bytecodes::_f2i;
1.163 + case SRC_DEST(T_FLOAT, T_LONG): return Bytecodes::_f2l;
1.164 + case SRC_DEST(T_FLOAT, T_DOUBLE): return Bytecodes::_f2d;
1.165 +
1.166 + case SRC_DEST(T_DOUBLE, T_INT): return Bytecodes::_d2i;
1.167 + case SRC_DEST(T_DOUBLE, T_LONG): return Bytecodes::_d2l;
1.168 + case SRC_DEST(T_DOUBLE, T_FLOAT): return Bytecodes::_d2f;
1.169 + }
1.170 +#undef SRC_DEST
1.171 +
1.172 + // cannot do it in one step, or at all
1.173 + return Bytecodes::_illegal;
1.174 +}
1.175 +
1.176 +MethodHandleWalker::ArgToken
1.177 +MethodHandleWalker::walk(TRAPS) {
1.178 + walk_incoming_state(CHECK_NULL);
1.179 +
1.180 + for (;;) {
1.181 + set_method_handle(chain().method_handle_oop());
1.182 +
1.183 + assert(_outgoing_argc == argument_count_slow(), "empty slots under control");
1.184 +
1.185 + if (chain().is_adapter()) {
1.186 + int conv_op = chain().adapter_conversion_op();
1.187 + int arg_slot = chain().adapter_arg_slot();
1.188 + SlotState* arg_state = slot_state(arg_slot);
1.189 + if (arg_state == NULL
1.190 + && conv_op > sun_dyn_AdapterMethodHandle::OP_RETYPE_RAW) {
1.191 + lose("bad argument index", CHECK_NULL);
1.192 + }
1.193 +
1.194 + // perform the adapter action
1.195 + switch (chain().adapter_conversion_op()) {
1.196 + case sun_dyn_AdapterMethodHandle::OP_RETYPE_ONLY:
1.197 + case sun_dyn_AdapterMethodHandle::OP_RETYPE_RAW:
1.198 + // No changes to arguments; pass the bits through.
1.199 + // The only difference between the two ops is that the "only" version
1.200 + // is fully compatible with the verifier, while the "raw" version
1.201 + // performs a few extra bitwise conversions (like long <-> double).
1.202 + break;
1.203 +
1.204 + case sun_dyn_AdapterMethodHandle::OP_CHECK_CAST: {
1.205 + // checkcast the Nth outgoing argument in place
1.206 + klassOop dest_klass = NULL;
1.207 + BasicType dest = java_lang_Class::as_BasicType(chain().adapter_arg_oop(), &dest_klass);
1.208 + assert(dest == T_OBJECT, "");
1.209 + assert(dest == arg_state->_type, "");
1.210 + arg_state->_arg = make_conversion(T_OBJECT, dest_klass, Bytecodes::_checkcast, arg_state->_arg, CHECK_NULL);
1.211 + debug_only(dest_klass = (klassOop)badOop);
1.212 + break;
1.213 + }
1.214 +
1.215 + case sun_dyn_AdapterMethodHandle::OP_PRIM_TO_PRIM: {
1.216 + // i2l, etc., on the Nth outgoing argument in place
1.217 + BasicType src = chain().adapter_conversion_src_type(),
1.218 + dest = chain().adapter_conversion_dest_type();
1.219 + Bytecodes::Code bc = conversion_code(src, dest);
1.220 + ArgToken arg = arg_state->_arg;
1.221 + if (bc == Bytecodes::_nop) {
1.222 + break;
1.223 + } else if (bc != Bytecodes::_illegal) {
1.224 + arg = make_conversion(dest, NULL, bc, arg, CHECK_NULL);
1.225 + } else if (is_subword_type(dest)) {
1.226 + bc = conversion_code(src, T_INT);
1.227 + if (bc != Bytecodes::_illegal) {
1.228 + arg = make_conversion(dest, NULL, bc, arg, CHECK_NULL);
1.229 + bc = conversion_code(T_INT, dest);
1.230 + arg = make_conversion(dest, NULL, bc, arg, CHECK_NULL);
1.231 + }
1.232 + }
1.233 + if (bc == Bytecodes::_illegal) {
1.234 + lose("bad primitive conversion", CHECK_NULL);
1.235 + }
1.236 + change_argument(src, arg_slot, dest, arg);
1.237 + break;
1.238 + }
1.239 +
1.240 + case sun_dyn_AdapterMethodHandle::OP_REF_TO_PRIM: {
1.241 + // checkcast to wrapper type & call intValue, etc.
1.242 + BasicType dest = chain().adapter_conversion_dest_type();
1.243 + ArgToken arg = arg_state->_arg;
1.244 + arg = make_conversion(T_OBJECT, SystemDictionary::box_klass(dest),
1.245 + Bytecodes::_checkcast, arg, CHECK_NULL);
1.246 + vmIntrinsics::ID unboxer = vmIntrinsics::for_unboxing(dest);
1.247 + if (unboxer == vmIntrinsics::_none) {
1.248 + lose("no unboxing method", CHECK_NULL);
1.249 + }
1.250 + ArgToken arglist[2];
1.251 + arglist[0] = arg; // outgoing 'this'
1.252 + arglist[1] = NULL; // sentinel
1.253 + arg = make_invoke(NULL, unboxer, Bytecodes::_invokevirtual, false, 1, &arglist[0], CHECK_NULL);
1.254 + change_argument(T_OBJECT, arg_slot, dest, arg);
1.255 + break;
1.256 + }
1.257 +
1.258 + case sun_dyn_AdapterMethodHandle::OP_PRIM_TO_REF: {
1.259 + // call wrapper type.valueOf
1.260 + BasicType src = chain().adapter_conversion_src_type();
1.261 + ArgToken arg = arg_state->_arg;
1.262 + vmIntrinsics::ID boxer = vmIntrinsics::for_boxing(src);
1.263 + if (boxer == vmIntrinsics::_none) {
1.264 + lose("no boxing method", CHECK_NULL);
1.265 + }
1.266 + ArgToken arglist[2];
1.267 + arglist[0] = arg; // outgoing value
1.268 + arglist[1] = NULL; // sentinel
1.269 + arg = make_invoke(NULL, boxer, Bytecodes::_invokevirtual, false, 1, &arglist[0], CHECK_NULL);
1.270 + change_argument(src, arg_slot, T_OBJECT, arg);
1.271 + break;
1.272 + }
1.273 +
1.274 + case sun_dyn_AdapterMethodHandle::OP_SWAP_ARGS: {
1.275 + int dest_arg_slot = chain().adapter_conversion_vminfo();
1.276 + if (!slot_has_argument(dest_arg_slot)) {
1.277 + lose("bad swap index", CHECK_NULL);
1.278 + }
1.279 + // a simple swap between two arguments
1.280 + SlotState* dest_arg_state = slot_state(dest_arg_slot);
1.281 + SlotState temp = (*dest_arg_state);
1.282 + (*dest_arg_state) = (*arg_state);
1.283 + (*arg_state) = temp;
1.284 + break;
1.285 + }
1.286 +
1.287 + case sun_dyn_AdapterMethodHandle::OP_ROT_ARGS: {
1.288 + int dest_arg_slot = chain().adapter_conversion_vminfo();
1.289 + if (!slot_has_argument(dest_arg_slot) || arg_slot == dest_arg_slot) {
1.290 + lose("bad rotate index", CHECK_NULL);
1.291 + }
1.292 + SlotState* dest_arg_state = slot_state(dest_arg_slot);
1.293 + // Rotate the source argument (plus following N slots) into the
1.294 + // position occupied by the dest argument (plus following N slots).
1.295 + int rotate_count = type2size[dest_arg_state->_type];
1.296 + // (no other rotate counts are currently supported)
1.297 + if (arg_slot < dest_arg_slot) {
1.298 + for (int i = 0; i < rotate_count; i++) {
1.299 + SlotState temp = _outgoing.at(arg_slot);
1.300 + _outgoing.remove_at(arg_slot);
1.301 + _outgoing.insert_before(dest_arg_slot + rotate_count - 1, temp);
1.302 + }
1.303 + } else { // arg_slot > dest_arg_slot
1.304 + for (int i = 0; i < rotate_count; i++) {
1.305 + SlotState temp = _outgoing.at(arg_slot + rotate_count - 1);
1.306 + _outgoing.remove_at(arg_slot + rotate_count - 1);
1.307 + _outgoing.insert_before(dest_arg_slot, temp);
1.308 + }
1.309 + }
1.310 + break;
1.311 + }
1.312 +
1.313 + case sun_dyn_AdapterMethodHandle::OP_DUP_ARGS: {
1.314 + int dup_slots = chain().adapter_conversion_stack_pushes();
1.315 + if (dup_slots <= 0) {
1.316 + lose("bad dup count", CHECK_NULL);
1.317 + }
1.318 + for (int i = 0; i < dup_slots; i++) {
1.319 + SlotState* dup = slot_state(arg_slot + 2*i);
1.320 + if (dup == NULL) break; // safety net
1.321 + if (dup->_type != T_VOID) _outgoing_argc += 1;
1.322 + _outgoing.insert_before(i, (*dup));
1.323 + }
1.324 + break;
1.325 + }
1.326 +
1.327 + case sun_dyn_AdapterMethodHandle::OP_DROP_ARGS: {
1.328 + int drop_slots = -chain().adapter_conversion_stack_pushes();
1.329 + if (drop_slots <= 0) {
1.330 + lose("bad drop count", CHECK_NULL);
1.331 + }
1.332 + for (int i = 0; i < drop_slots; i++) {
1.333 + SlotState* drop = slot_state(arg_slot);
1.334 + if (drop == NULL) break; // safety net
1.335 + if (drop->_type != T_VOID) _outgoing_argc -= 1;
1.336 + _outgoing.remove_at(arg_slot);
1.337 + }
1.338 + break;
1.339 + }
1.340 +
1.341 + case sun_dyn_AdapterMethodHandle::OP_COLLECT_ARGS: { //NYI, may GC
1.342 + lose("unimplemented", CHECK_NULL);
1.343 + break;
1.344 + }
1.345 +
1.346 + case sun_dyn_AdapterMethodHandle::OP_SPREAD_ARGS: {
1.347 + klassOop array_klass_oop = NULL;
1.348 + BasicType array_type = java_lang_Class::as_BasicType(chain().adapter_arg_oop(),
1.349 + &array_klass_oop);
1.350 + assert(array_type == T_OBJECT, "");
1.351 + assert(Klass::cast(array_klass_oop)->oop_is_array(), "");
1.352 + arrayKlassHandle array_klass(THREAD, array_klass_oop);
1.353 + debug_only(array_klass_oop = (klassOop)badOop);
1.354 +
1.355 + klassOop element_klass_oop = NULL;
1.356 + BasicType element_type = java_lang_Class::as_BasicType(array_klass->component_mirror(),
1.357 + &element_klass_oop);
1.358 + KlassHandle element_klass(THREAD, element_klass_oop);
1.359 + debug_only(element_klass_oop = (klassOop)badOop);
1.360 +
1.361 + // Fetch the argument, which we will cast to the required array type.
1.362 + assert(arg_state->_type == T_OBJECT, "");
1.363 + ArgToken array_arg = arg_state->_arg;
1.364 + array_arg = make_conversion(T_OBJECT, array_klass(), Bytecodes::_checkcast, array_arg, CHECK_NULL);
1.365 + change_argument(T_OBJECT, arg_slot, T_VOID, NULL);
1.366 +
1.367 + // Check the required length.
1.368 + int spread_slots = 1 + chain().adapter_conversion_stack_pushes();
1.369 + int spread_length = spread_slots;
1.370 + if (type2size[element_type] == 2) {
1.371 + if (spread_slots % 2 != 0) spread_slots = -1; // force error
1.372 + spread_length = spread_slots / 2;
1.373 + }
1.374 + if (spread_slots < 0) {
1.375 + lose("bad spread length", CHECK_NULL);
1.376 + }
1.377 +
1.378 + jvalue length_jvalue; length_jvalue.i = spread_length;
1.379 + ArgToken length_arg = make_prim_constant(T_INT, &length_jvalue, CHECK_NULL);
1.380 + // Call a built-in method known to the JVM to validate the length.
1.381 + ArgToken arglist[3];
1.382 + arglist[0] = array_arg; // value to check
1.383 + arglist[1] = length_arg; // length to check
1.384 + arglist[2] = NULL; // sentinel
1.385 + make_invoke(NULL, vmIntrinsics::_checkSpreadArgument,
1.386 + Bytecodes::_invokestatic, false, 3, &arglist[0], CHECK_NULL);
1.387 +
1.388 + // Spread out the array elements.
1.389 + Bytecodes::Code aload_op = Bytecodes::_aaload;
1.390 + if (element_type != T_OBJECT) {
1.391 + lose("primitive array NYI", CHECK_NULL);
1.392 + }
1.393 + int ap = arg_slot;
1.394 + for (int i = 0; i < spread_length; i++) {
1.395 + jvalue offset_jvalue; offset_jvalue.i = i;
1.396 + ArgToken offset_arg = make_prim_constant(T_INT, &offset_jvalue, CHECK_NULL);
1.397 + ArgToken element_arg = make_fetch(element_type, element_klass(), aload_op, array_arg, offset_arg, CHECK_NULL);
1.398 + change_argument(T_VOID, ap, element_type, element_arg);
1.399 + ap += type2size[element_type];
1.400 + }
1.401 + break;
1.402 + }
1.403 +
1.404 + case sun_dyn_AdapterMethodHandle::OP_FLYBY: //NYI, runs Java code
1.405 + case sun_dyn_AdapterMethodHandle::OP_RICOCHET: //NYI, runs Java code
1.406 + lose("unimplemented", CHECK_NULL);
1.407 + break;
1.408 +
1.409 + default:
1.410 + lose("bad adapter conversion", CHECK_NULL);
1.411 + break;
1.412 + }
1.413 + }
1.414 +
1.415 + if (chain().is_bound()) {
1.416 + // push a new argument
1.417 + BasicType arg_type = chain().bound_arg_type();
1.418 + jint arg_slot = chain().bound_arg_slot();
1.419 + oop arg_oop = chain().bound_arg_oop();
1.420 + ArgToken arg = NULL;
1.421 + if (arg_type == T_OBJECT) {
1.422 + arg = make_oop_constant(arg_oop, CHECK_NULL);
1.423 + } else {
1.424 + jvalue arg_value;
1.425 + BasicType bt = java_lang_boxing_object::get_value(arg_oop, &arg_value);
1.426 + if (bt == arg_type) {
1.427 + arg = make_prim_constant(arg_type, &arg_value, CHECK_NULL);
1.428 + } else {
1.429 + lose("bad bound value", CHECK_NULL);
1.430 + }
1.431 + }
1.432 + debug_only(arg_oop = badOop);
1.433 + change_argument(T_VOID, arg_slot, arg_type, arg);
1.434 + }
1.435 +
1.436 + // this test must come after the body of the loop
1.437 + if (!chain().is_last()) {
1.438 + chain().next(CHECK_NULL);
1.439 + } else {
1.440 + break;
1.441 + }
1.442 + }
1.443 +
1.444 + // finish the sequence with a tail-call to the ultimate target
1.445 + // parameters are passed in logical order (recv 1st), not slot order
1.446 + ArgToken* arglist = NEW_RESOURCE_ARRAY(ArgToken, _outgoing.length() + 1);
1.447 + int ap = 0;
1.448 + for (int i = _outgoing.length() - 1; i >= 0; i--) {
1.449 + SlotState* arg_state = slot_state(i);
1.450 + if (arg_state->_type == T_VOID) continue;
1.451 + arglist[ap++] = _outgoing.at(i)._arg;
1.452 + }
1.453 + assert(ap == _outgoing_argc, "");
1.454 + arglist[ap] = NULL; // add a sentinel, for the sake of asserts
1.455 + return make_invoke(chain().last_method_oop(),
1.456 + vmIntrinsics::_none,
1.457 + chain().last_invoke_code(), true,
1.458 + ap, arglist, THREAD);
1.459 +}
1.460 +
1.461 +void MethodHandleWalker::walk_incoming_state(TRAPS) {
1.462 + Handle mtype(THREAD, chain().method_type_oop());
1.463 + int nptypes = java_dyn_MethodType::ptype_count(mtype());
1.464 + _outgoing_argc = nptypes;
1.465 + int argp = nptypes - 1;
1.466 + if (argp >= 0) {
1.467 + _outgoing.at_grow(argp, make_state(T_VOID, NULL)); // presize
1.468 + }
1.469 + for (int i = 0; i < nptypes; i++) {
1.470 + klassOop arg_type_klass = NULL;
1.471 + BasicType arg_type = java_lang_Class::as_BasicType(
1.472 + java_dyn_MethodType::ptype(mtype(), i), &arg_type_klass);
1.473 + ArgToken arg = make_parameter(arg_type, arg_type_klass, i, CHECK);
1.474 + debug_only(arg_type_klass = (klassOop)NULL);
1.475 + _outgoing.at_put(argp, make_state(arg_type, arg));
1.476 + if (type2size[arg_type] == 2) {
1.477 + // add the extra slot, so we can model the JVM stack
1.478 + _outgoing.insert_before(argp+1, make_state(T_VOID, NULL));
1.479 + }
1.480 + --argp;
1.481 + }
1.482 + // call make_parameter at the end of the list for the return type
1.483 + klassOop ret_type_klass = NULL;
1.484 + BasicType ret_type = java_lang_Class::as_BasicType(
1.485 + java_dyn_MethodType::rtype(mtype()), &ret_type_klass);
1.486 + ArgToken ret = make_parameter(ret_type, ret_type_klass, -1, CHECK);
1.487 + // ignore ret; client can catch it if needed
1.488 +}
1.489 +
1.490 +// this is messy because some kinds of arguments are paired with
1.491 +// companion slots containing an empty value
1.492 +void MethodHandleWalker::change_argument(BasicType old_type, int slot, BasicType new_type,
1.493 + MethodHandleWalker::ArgToken new_arg) {
1.494 + int old_size = type2size[old_type];
1.495 + int new_size = type2size[new_type];
1.496 + if (old_size == new_size) {
1.497 + // simple case first
1.498 + _outgoing.at_put(slot, make_state(new_type, new_arg));
1.499 + } else if (old_size > new_size) {
1.500 + for (int i = old_size-1; i >= new_size; i++) {
1.501 + assert((i != 0) == (_outgoing.at(slot + i)._type == T_VOID), "");
1.502 + _outgoing.remove_at(slot + i);
1.503 + }
1.504 + if (new_size > 0)
1.505 + _outgoing.at_put(slot, make_state(new_type, new_arg));
1.506 + else
1.507 + _outgoing_argc -= 1; // deleted a real argument
1.508 + } else {
1.509 + for (int i = old_size; i < new_size; i++) {
1.510 + _outgoing.insert_before(slot+i, make_state(T_VOID, NULL));
1.511 + }
1.512 + _outgoing.at_put(slot, make_state(new_type, new_arg));
1.513 + if (old_size == 0)
1.514 + _outgoing_argc += 1; // inserted a real argument
1.515 + }
1.516 +}
1.517 +
1.518 +
1.519 +#ifdef ASSERT
1.520 +int MethodHandleWalker::argument_count_slow() {
1.521 + int args_seen = 0;
1.522 + for (int i = _outgoing.length() - 1; i >= 0; i--) {
1.523 + if (_outgoing.at(i)._type != T_VOID) {
1.524 + ++args_seen;
1.525 + }
1.526 + }
1.527 + return args_seen;
1.528 +}
1.529 +#endif
1.530 +
1.531 +
1.532 +void MethodHandleCompiler::compile(TRAPS) {
1.533 + assert(_thread == THREAD, "must be same thread");
1.534 +
1.535 + _constant_oops.append(Handle()); // element zero is always the null constant
1.536 + _constant_prims.append(NULL);
1.537 + {
1.538 + symbolOop sig
1.539 + = java_dyn_MethodType::as_signature(chain().method_type_oop(), true, CHECK);
1.540 + _signature_index = find_oop_constant(sig);
1.541 + assert(signature() == sig, "");
1.542 + }
1.543 +
1.544 + walk(CHECK);
1.545 +}
1.546 +
1.547 +MethodHandleWalker::ArgToken
1.548 +MethodHandleCompiler::make_conversion(BasicType type, klassOop tk, Bytecodes::Code op,
1.549 + MethodHandleWalker::ArgToken src, TRAPS) {
1.550 + Unimplemented();
1.551 + return NULL;
1.552 +}
1.553 +
1.554 +MethodHandleWalker::ArgToken
1.555 +MethodHandleCompiler::make_invoke(methodOop m, vmIntrinsics::ID iid,
1.556 + Bytecodes::Code op, bool tailcall,
1.557 + int argc, MethodHandleWalker::ArgToken* argv,
1.558 + TRAPS) {
1.559 + // If tailcall, we have walked all the way to a direct method handle.
1.560 + // Otherwise, make a recursive call to some helper routine.
1.561 +#ifdef ASSERT
1.562 + switch (op) {
1.563 + case Bytecodes::_invokevirtual:
1.564 + case Bytecodes::_invokespecial:
1.565 + case Bytecodes::_invokestatic:
1.566 + case Bytecodes::_invokeinterface:
1.567 + break;
1.568 + default:
1.569 + ShouldNotReachHere();
1.570 + }
1.571 +#endif //ASSERT
1.572 + _bytes.put((char) op);
1.573 +
1.574 + Unimplemented();
1.575 + return NULL;
1.576 +}
1.577 +
1.578 +MethodHandleWalker::ArgToken
1.579 +MethodHandleCompiler::make_fetch(BasicType type, klassOop tk, Bytecodes::Code op,
1.580 + MethodHandleWalker::ArgToken base,
1.581 + MethodHandleWalker::ArgToken offset,
1.582 + TRAPS) {
1.583 + Unimplemented();
1.584 + return NULL;
1.585 +}
1.586 +
1.587 +int MethodHandleCompiler::find_oop_constant(oop con) {
1.588 + if (con == NULL) return 0;
1.589 + for (int i = 1, imax = _constant_oops.length(); i < imax; i++) {
1.590 + if (_constant_oops.at(i) == con)
1.591 + return i;
1.592 + }
1.593 + _constant_prims.append(NULL);
1.594 + return _constant_oops.append(con);
1.595 +}
1.596 +
1.597 +int MethodHandleCompiler::find_prim_constant(BasicType bt, jvalue* con) {
1.598 + jvalue con_copy;
1.599 + assert(bt < T_OBJECT, "");
1.600 + if (type2aelembytes(bt) < jintSize) {
1.601 + // widen to int
1.602 + con_copy = (*con);
1.603 + con = &con_copy;
1.604 + switch (bt) {
1.605 + case T_BOOLEAN: con->i = (con->z ? 1 : 0); break;
1.606 + case T_BYTE: con->i = con->b; break;
1.607 + case T_CHAR: con->i = con->c; break;
1.608 + case T_SHORT: con->i = con->s; break;
1.609 + default: ShouldNotReachHere();
1.610 + }
1.611 + bt = T_INT;
1.612 + }
1.613 + for (int i = 1, imax = _constant_prims.length(); i < imax; i++) {
1.614 + PrimCon* pcon = _constant_prims.at(i);
1.615 + if (pcon != NULL && pcon->_type == bt) {
1.616 + bool match = false;
1.617 + switch (type2size[bt]) {
1.618 + case 1: if (pcon->_value.i == con->i) match = true; break;
1.619 + case 2: if (pcon->_value.j == con->j) match = true; break;
1.620 + }
1.621 + if (match)
1.622 + return i;
1.623 + }
1.624 + }
1.625 + PrimCon* pcon = new PrimCon();
1.626 + pcon->_type = bt;
1.627 + pcon->_value = (*con);
1.628 + _constant_oops.append(Handle());
1.629 + return _constant_prims.append(pcon);
1.630 +}
1.631 +
1.632 +
1.633 +#ifndef PRODUCT
1.634 +
1.635 +// MH printer for debugging.
1.636 +
1.637 +class MethodHandlePrinter : public MethodHandleWalker {
1.638 +private:
1.639 + outputStream* _out;
1.640 + bool _verbose;
1.641 + int _temp_num;
1.642 + stringStream _strbuf;
1.643 + const char* strbuf() {
1.644 + const char* s = _strbuf.as_string();
1.645 + _strbuf.reset();
1.646 + return s;
1.647 + }
1.648 + ArgToken token(const char* str) {
1.649 + return (ArgToken) str;
1.650 + }
1.651 + void start_params() {
1.652 + _out->print("(");
1.653 + }
1.654 + void end_params() {
1.655 + if (_verbose) _out->print("\n");
1.656 + _out->print(") => {");
1.657 + }
1.658 + void put_type_name(BasicType type, klassOop tk, outputStream* s) {
1.659 + const char* kname = NULL;
1.660 + if (tk != NULL)
1.661 + kname = Klass::cast(tk)->external_name();
1.662 + s->print("%s", (kname != NULL) ? kname : type2name(type));
1.663 + }
1.664 + ArgToken maybe_make_temp(const char* statement_op, BasicType type, const char* temp_name) {
1.665 + const char* value = strbuf();
1.666 + if (!_verbose) return token(value);
1.667 + // make an explicit binding for each separate value
1.668 + _strbuf.print("%s%d", temp_name, ++_temp_num);
1.669 + const char* temp = strbuf();
1.670 + _out->print("\n %s %s %s = %s;", statement_op, type2name(type), temp, value);
1.671 + return token(temp);
1.672 + }
1.673 +
1.674 +public:
1.675 + MethodHandlePrinter(Handle root, bool verbose, outputStream* out, TRAPS)
1.676 + : MethodHandleWalker(root, THREAD),
1.677 + _out(out),
1.678 + _verbose(verbose),
1.679 + _temp_num(0)
1.680 + {
1.681 + start_params();
1.682 + }
1.683 + virtual ArgToken make_parameter(BasicType type, klassOop tk, int argnum, TRAPS) {
1.684 + if (argnum < 0) {
1.685 + end_params();
1.686 + return NULL;
1.687 + }
1.688 + if (argnum == 0) {
1.689 + _out->print(_verbose ? "\n " : "");
1.690 + } else {
1.691 + _out->print(_verbose ? ",\n " : ", ");
1.692 + }
1.693 + if (argnum >= _temp_num)
1.694 + _temp_num = argnum;
1.695 + // generate an argument name
1.696 + _strbuf.print("a%d", argnum);
1.697 + const char* arg = strbuf();
1.698 + put_type_name(type, tk, _out);
1.699 + _out->print(" %s", arg);
1.700 + return token(arg);
1.701 + }
1.702 + virtual ArgToken make_oop_constant(oop con, TRAPS) {
1.703 + if (con == NULL)
1.704 + _strbuf.print("null");
1.705 + else
1.706 + con->print_value_on(&_strbuf);
1.707 + if (_strbuf.size() == 0) { // yuck
1.708 + _strbuf.print("(a ");
1.709 + put_type_name(T_OBJECT, con->klass(), &_strbuf);
1.710 + _strbuf.print(")");
1.711 + }
1.712 + return maybe_make_temp("constant", T_OBJECT, "k");
1.713 + }
1.714 + virtual ArgToken make_prim_constant(BasicType type, jvalue* con, TRAPS) {
1.715 + java_lang_boxing_object::print(type, con, &_strbuf);
1.716 + return maybe_make_temp("constant", type, "k");
1.717 + }
1.718 + virtual ArgToken make_conversion(BasicType type, klassOop tk, Bytecodes::Code op, ArgToken src, TRAPS) {
1.719 + _strbuf.print("%s(%s", Bytecodes::name(op), (const char*)src);
1.720 + if (tk != NULL) {
1.721 + _strbuf.print(", ");
1.722 + put_type_name(type, tk, &_strbuf);
1.723 + }
1.724 + _strbuf.print(")");
1.725 + return maybe_make_temp("convert", type, "v");
1.726 + }
1.727 + virtual ArgToken make_fetch(BasicType type, klassOop tk, Bytecodes::Code op, ArgToken base, ArgToken offset, TRAPS) {
1.728 + _strbuf.print("%s(%s, %s", Bytecodes::name(op), (const char*)base, (const char*)offset);
1.729 + if (tk != NULL) {
1.730 + _strbuf.print(", ");
1.731 + put_type_name(type, tk, &_strbuf);
1.732 + }
1.733 + _strbuf.print(")");
1.734 + return maybe_make_temp("fetch", type, "x");
1.735 + }
1.736 + virtual ArgToken make_invoke(methodOop m, vmIntrinsics::ID iid,
1.737 + Bytecodes::Code op, bool tailcall,
1.738 + int argc, ArgToken* argv, TRAPS) {
1.739 + symbolOop name, sig;
1.740 + if (m != NULL) {
1.741 + name = m->name();
1.742 + sig = m->signature();
1.743 + } else {
1.744 + name = vmSymbols::symbol_at(vmIntrinsics::name_for(iid));
1.745 + sig = vmSymbols::symbol_at(vmIntrinsics::signature_for(iid));
1.746 + }
1.747 + _strbuf.print("%s %s%s(", Bytecodes::name(op), name->as_C_string(), sig->as_C_string());
1.748 + for (int i = 0; i < argc; i++) {
1.749 + _strbuf.print("%s%s", (i > 0 ? ", " : ""), (const char*)argv[i]);
1.750 + }
1.751 + _strbuf.print(")");
1.752 + if (!tailcall) {
1.753 + BasicType rt = char2type(sig->byte_at(sig->utf8_length()-1));
1.754 + if (rt == T_ILLEGAL) rt = T_OBJECT; // ';' at the end of '(...)L...;'
1.755 + return maybe_make_temp("invoke", rt, "x");
1.756 + } else {
1.757 + const char* ret = strbuf();
1.758 + _out->print(_verbose ? "\n return " : " ");
1.759 + _out->print("%s", ret);
1.760 + _out->print(_verbose ? "\n}\n" : " }");
1.761 + }
1.762 + return ArgToken();
1.763 + }
1.764 +
1.765 + virtual void set_method_handle(oop mh) {
1.766 + if (WizardMode && Verbose) {
1.767 + tty->print("\n--- next target: ");
1.768 + mh->print();
1.769 + }
1.770 + }
1.771 +
1.772 + static void print(Handle root, bool verbose, outputStream* out, TRAPS) {
1.773 + ResourceMark rm;
1.774 + MethodHandlePrinter printer(root, verbose, out, CHECK);
1.775 + printer.walk(CHECK);
1.776 + out->print("\n");
1.777 + }
1.778 + static void print(Handle root, bool verbose = Verbose, outputStream* out = tty) {
1.779 + EXCEPTION_MARK;
1.780 + ResourceMark rm;
1.781 + MethodHandlePrinter printer(root, verbose, out, THREAD);
1.782 + if (!HAS_PENDING_EXCEPTION)
1.783 + printer.walk(THREAD);
1.784 + if (HAS_PENDING_EXCEPTION) {
1.785 + oop ex = PENDING_EXCEPTION;
1.786 + CLEAR_PENDING_EXCEPTION;
1.787 + out->print("\n*** ");
1.788 + if (ex != Universe::virtual_machine_error_instance())
1.789 + ex->print_on(out);
1.790 + else
1.791 + out->print("lose: %s", printer.lose_message());
1.792 + out->print("\n}\n");
1.793 + }
1.794 + out->print("\n");
1.795 + }
1.796 +};
1.797 +
1.798 +extern "C"
1.799 +void print_method_handle(oop mh) {
1.800 + if (java_dyn_MethodHandle::is_instance(mh)) {
1.801 + MethodHandlePrinter::print(mh);
1.802 + } else {
1.803 + tty->print("*** not a method handle: ");
1.804 + mh->print();
1.805 + }
1.806 +}
1.807 +
1.808 +#endif // PRODUCT
