12e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath/* 22e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath * Copyright (c) 2008, 2013, Oracle and/or its affiliates. All rights reserved. 32e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 42e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath * 52e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath * This code is free software; you can redistribute it and/or modify it 62e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath * under the terms of the GNU General Public License version 2 only, as 72e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath * published by the Free Software Foundation. Oracle designates this 82e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath * particular file as subject to the "Classpath" exception as provided 92e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath * by Oracle in the LICENSE file that accompanied this code. 102e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath * 112e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath * This code is distributed in the hope that it will be useful, but WITHOUT 122e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 132e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 142e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath * version 2 for more details (a copy is included in the LICENSE file that 152e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath * accompanied this code). 162e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath * 172e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath * You should have received a copy of the GNU General Public License version 182e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath * 2 along with this work; if not, write to the Free Software Foundation, 192e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 202e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath * 212e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 222e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath * or visit www.oracle.com if you need additional information or have any 232e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath * questions. 242e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath */ 252e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath 262e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamathpackage java.lang.invoke; 272e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath 282e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamathimport sun.invoke.util.Wrapper; 292e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamathimport java.lang.ref.SoftReference; 302e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamathimport static java.lang.invoke.MethodHandleStatics.*; 312e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath 322e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath/** 332e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath * Shared information for a group of method types, which differ 342e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath * only by reference types, and therefore share a common erasure 352e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath * and wrapping. 362e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath * <p> 372e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath * For an empirical discussion of the structure of method types, 382e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath * see <a href="http://groups.google.com/group/jvm-languages/browse_thread/thread/ac9308ae74da9b7e/"> 392e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath * the thread "Avoiding Boxing" on jvm-languages</a>. 402e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath * There are approximately 2000 distinct erased method types in the JDK. 412e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath * There are a little over 10 times that number of unerased types. 422e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath * No more than half of these are likely to be loaded at once. 432e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath * @author John Rose 442e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath */ 452e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamathfinal class MethodTypeForm { 462e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath final int[] argToSlotTable, slotToArgTable; 472e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath final long argCounts; // packed slot & value counts 482e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath final long primCounts; // packed prim & double counts 492e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath final MethodType erasedType; // the canonical erasure 502e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath final MethodType basicType; // the canonical erasure, with primitives simplified 512e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath 522e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath // Cached adapter information: 532e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath // 542e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath // @Stable final SoftReference<MethodHandle>[] methodHandles; 552e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath // static final int MH_BASIC_INV, MH_NF_INV, MH_UNINIT_CS, MH_LIMIT; 562e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath // 572e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath // Cached lambda form information, for basic types only: 582e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath // final @Stable SoftReference<LambdaForm>[] lambdaForms; 592e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath // 602e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath // Indexes into lambdaForms: 612e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath // 622e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath // static final int LF_INVVIRTUAL, LF_INVSTATIC, LF_INVSPECIAL, LF_NEWINVSPECIAL, 632e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath // LF_INVINTERFACE, LF_INVSTATIC_INIT, LF_INTERPRET, LF_REBIND, LF_DELEGATE, 642e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath // LF_DELEGATE_BLOCK_INLINING, LF_EX_LINKER, LF_EX_INVOKER, LF_GEN_LINKER, LF_GEN_INVOKER, 652e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath // LF_CS_LINKER, LF_MH_LINKER, LF_GWC, LF_GWT, LF_LIMIT; 662e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath 672e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath /** Return the type corresponding uniquely (1-1) to this MT-form. 682e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath * It might have any primitive returns or arguments, but will have no references except Object. 692e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath */ 702e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath public MethodType erasedType() { 712e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath return erasedType; 722e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath } 732e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath 742e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath /** Return the basic type derived from the erased type of this MT-form. 752e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath * A basic type is erased (all references Object) and also has all primitive 762e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath * types (except int, long, float, double, void) normalized to int. 772e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath * Such basic types correspond to low-level JVM calling sequences. 782e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath */ 792e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath public MethodType basicType() { 802e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath return basicType; 812e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath } 822e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath 832e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath private boolean assertIsBasicType() { 842e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath // primitives must be flattened also 852e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath assert(erasedType == basicType) 862e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath : "erasedType: " + erasedType + " != basicType: " + basicType; 872e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath return true; 882e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath } 892e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath 902e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath // Android-changed: Removed caches for MethodHandle adaptors / LambdaForms. 912e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath // 922e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath // public MethodHandle cachedMethodHandle(int which); 932e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath // synchronized public MethodHandle setCachedMethodHandle(int which, MethodHandle mh); 942e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath // public LambdaForm cachedLambdaForm(int which); 952e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath // synchronized public LambdaForm setCachedLambdaForm(int which, LambdaForm form); 962e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath 972e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath /** 982e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath * Build an MTF for a given type, which must have all references erased to Object. 992e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath * This MTF will stand for that type and all un-erased variations. 1002e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath * Eagerly compute some basic properties of the type, common to all variations. 1012e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath */ 1022e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath @SuppressWarnings({"rawtypes", "unchecked"}) 1032e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath protected MethodTypeForm(MethodType erasedType) { 1042e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath this.erasedType = erasedType; 1052e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath 1062e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath Class<?>[] ptypes = erasedType.ptypes(); 1072e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath int ptypeCount = ptypes.length; 1082e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath int pslotCount = ptypeCount; // temp. estimate 1092e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath int rtypeCount = 1; // temp. estimate 1102e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath int rslotCount = 1; // temp. estimate 1112e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath 1122e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath int[] argToSlotTab = null, slotToArgTab = null; 1132e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath 1142e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath // Walk the argument types, looking for primitives. 1152e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath int pac = 0, lac = 0, prc = 0, lrc = 0; 1162e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath Class<?>[] epts = ptypes; 1172e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath Class<?>[] bpts = epts; 1182e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath for (int i = 0; i < epts.length; i++) { 1192e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath Class<?> pt = epts[i]; 1202e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath if (pt != Object.class) { 1212e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath ++pac; 1222e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath Wrapper w = Wrapper.forPrimitiveType(pt); 1232e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath if (w.isDoubleWord()) ++lac; 1242e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath if (w.isSubwordOrInt() && pt != int.class) { 1252e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath if (bpts == epts) 1262e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath bpts = bpts.clone(); 1272e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath bpts[i] = int.class; 1282e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath } 1292e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath } 1302e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath } 1312e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath pslotCount += lac; // #slots = #args + #longs 1322e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath Class<?> rt = erasedType.returnType(); 1332e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath Class<?> bt = rt; 1342e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath if (rt != Object.class) { 1352e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath ++prc; // even void.class counts as a prim here 1362e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath Wrapper w = Wrapper.forPrimitiveType(rt); 1372e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath if (w.isDoubleWord()) ++lrc; 1382e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath if (w.isSubwordOrInt() && rt != int.class) 1392e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath bt = int.class; 1402e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath // adjust #slots, #args 1412e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath if (rt == void.class) 1422e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath rtypeCount = rslotCount = 0; 1432e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath else 1442e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath rslotCount += lrc; 1452e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath } 1462e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath if (epts == bpts && bt == rt) { 1472e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath this.basicType = erasedType; 1482e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath } else { 1492e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath this.basicType = MethodType.makeImpl(bt, bpts, true); 1502e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath // fill in rest of data from the basic type: 1512e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath MethodTypeForm that = this.basicType.form(); 1522e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath assert(this != that); 1532e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath this.primCounts = that.primCounts; 1542e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath this.argCounts = that.argCounts; 1552e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath this.argToSlotTable = that.argToSlotTable; 1562e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath this.slotToArgTable = that.slotToArgTable; 1572e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath // Android-changed: Removed cached adaptors / lambda forms. 1582e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath // 1592e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath // this.methodHandles = null; 1602e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath // this.lambdaForms = null; 1612e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath return; 1622e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath } 1632e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath if (lac != 0) { 1642e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath int slot = ptypeCount + lac; 1652e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath slotToArgTab = new int[slot+1]; 1662e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath argToSlotTab = new int[1+ptypeCount]; 1672e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath argToSlotTab[0] = slot; // argument "-1" is past end of slots 1682e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath for (int i = 0; i < epts.length; i++) { 1692e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath Class<?> pt = epts[i]; 1702e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath Wrapper w = Wrapper.forBasicType(pt); 1712e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath if (w.isDoubleWord()) --slot; 1722e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath --slot; 1732e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath slotToArgTab[slot] = i+1; // "+1" see argSlotToParameter note 1742e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath argToSlotTab[1+i] = slot; 1752e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath } 1762e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath assert(slot == 0); // filled the table 1772e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath } else if (pac != 0) { 1782e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath // have primitives but no long primitives; share slot counts with generic 1792e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath assert(ptypeCount == pslotCount); 1802e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath MethodTypeForm that = MethodType.genericMethodType(ptypeCount).form(); 1812e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath assert(this != that); 1822e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath slotToArgTab = that.slotToArgTable; 1832e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath argToSlotTab = that.argToSlotTable; 1842e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath } else { 1852e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath int slot = ptypeCount; // first arg is deepest in stack 1862e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath slotToArgTab = new int[slot+1]; 1872e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath argToSlotTab = new int[1+ptypeCount]; 1882e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath argToSlotTab[0] = slot; // argument "-1" is past end of slots 1892e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath for (int i = 0; i < ptypeCount; i++) { 1902e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath --slot; 1912e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath slotToArgTab[slot] = i+1; // "+1" see argSlotToParameter note 1922e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath argToSlotTab[1+i] = slot; 1932e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath } 1942e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath } 1952e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath this.primCounts = pack(lrc, prc, lac, pac); 1962e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath this.argCounts = pack(rslotCount, rtypeCount, pslotCount, ptypeCount); 1972e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath this.argToSlotTable = argToSlotTab; 1982e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath this.slotToArgTable = slotToArgTab; 1992e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath 2002e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath if (pslotCount >= 256) throw newIllegalArgumentException("too many arguments"); 2012e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath 2022e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath // Initialize caches, but only for basic types 2032e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath assert(basicType == erasedType); 2042e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath // Android-changed: Removed cached adaptors / lambda forms. 2052e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath // 2062e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath // this.lambdaForms = new SoftReference[LF_LIMIT]; 2072e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath // this.methodHandles = new SoftReference[MH_LIMIT]; 2082e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath } 2092e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath 2102e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath private static long pack(int a, int b, int c, int d) { 2112e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath assert(((a|b|c|d) & ~0xFFFF) == 0); 2122e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath long hw = ((a << 16) | b), lw = ((c << 16) | d); 2132e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath return (hw << 32) | lw; 2142e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath } 2152e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath private static char unpack(long packed, int word) { // word==0 => return a, ==3 => return d 2162e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath assert(word <= 3); 2172e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath return (char)(packed >> ((3-word) * 16)); 2182e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath } 2192e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath 2202e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath public int parameterCount() { // # outgoing values 2212e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath return unpack(argCounts, 3); 2222e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath } 2232e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath public int parameterSlotCount() { // # outgoing interpreter slots 2242e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath return unpack(argCounts, 2); 2252e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath } 2262e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath public int returnCount() { // = 0 (V), or 1 2272e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath return unpack(argCounts, 1); 2282e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath } 2292e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath public int returnSlotCount() { // = 0 (V), 2 (J/D), or 1 2302e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath return unpack(argCounts, 0); 2312e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath } 2322e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath public int primitiveParameterCount() { 2332e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath return unpack(primCounts, 3); 2342e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath } 2352e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath public int longPrimitiveParameterCount() { 2362e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath return unpack(primCounts, 2); 2372e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath } 2382e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath public int primitiveReturnCount() { // = 0 (obj), or 1 2392e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath return unpack(primCounts, 1); 2402e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath } 2412e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath public int longPrimitiveReturnCount() { // = 1 (J/D), or 0 2422e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath return unpack(primCounts, 0); 2432e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath } 2442e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath public boolean hasPrimitives() { 2452e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath return primCounts != 0; 2462e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath } 2472e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath public boolean hasNonVoidPrimitives() { 2482e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath if (primCounts == 0) return false; 2492e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath if (primitiveParameterCount() != 0) return true; 2502e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath return (primitiveReturnCount() != 0 && returnCount() != 0); 2512e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath } 2522e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath public boolean hasLongPrimitives() { 2532e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath return (longPrimitiveParameterCount() | longPrimitiveReturnCount()) != 0; 2542e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath } 2552e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath public int parameterToArgSlot(int i) { 2562e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath return argToSlotTable[1+i]; 2572e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath } 2582e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath public int argSlotToParameter(int argSlot) { 2592e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath // Note: Empty slots are represented by zero in this table. 2602e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath // Valid arguments slots contain incremented entries, so as to be non-zero. 2612e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath // We return -1 the caller to mean an empty slot. 2622e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath return slotToArgTable[argSlot] - 1; 2632e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath } 2642e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath 2652e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath static MethodTypeForm findForm(MethodType mt) { 2662e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath MethodType erased = canonicalize(mt, ERASE, ERASE); 2672e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath if (erased == null) { 2682e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath // It is already erased. Make a new MethodTypeForm. 2692e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath return new MethodTypeForm(mt); 2702e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath } else { 2712e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath // Share the MethodTypeForm with the erased version. 2722e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath return erased.form(); 2732e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath } 2742e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath } 2752e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath 2762e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath /** Codes for {@link #canonicalize(java.lang.Class, int)}. 2772e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath * ERASE means change every reference to {@code Object}. 2782e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath * WRAP means convert primitives (including {@code void} to their 2792e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath * corresponding wrapper types. UNWRAP means the reverse of WRAP. 2802e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath * INTS means convert all non-void primitive types to int or long, 2812e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath * according to size. LONGS means convert all non-void primitives 2822e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath * to long, regardless of size. RAW_RETURN means convert a type 2832e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath * (assumed to be a return type) to int if it is smaller than an int, 2842e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath * or if it is void. 2852e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath */ 2862e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath public static final int NO_CHANGE = 0, ERASE = 1, WRAP = 2, UNWRAP = 3, INTS = 4, LONGS = 5, RAW_RETURN = 6; 2872e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath 2882e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath /** Canonicalize the types in the given method type. 2892e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath * If any types change, intern the new type, and return it. 2902e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath * Otherwise return null. 2912e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath */ 2922e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath public static MethodType canonicalize(MethodType mt, int howRet, int howArgs) { 2932e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath Class<?>[] ptypes = mt.ptypes(); 2942e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath Class<?>[] ptc = MethodTypeForm.canonicalizeAll(ptypes, howArgs); 2952e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath Class<?> rtype = mt.returnType(); 2962e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath Class<?> rtc = MethodTypeForm.canonicalize(rtype, howRet); 2972e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath if (ptc == null && rtc == null) { 2982e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath // It is already canonical. 2992e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath return null; 3002e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath } 3012e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath // Find the erased version of the method type: 3022e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath if (rtc == null) rtc = rtype; 3032e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath if (ptc == null) ptc = ptypes; 3042e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath return MethodType.makeImpl(rtc, ptc, true); 3052e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath } 3062e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath 3072e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath /** Canonicalize the given return or param type. 3082e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath * Return null if the type is already canonicalized. 3092e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath */ 3102e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath static Class<?> canonicalize(Class<?> t, int how) { 3112e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath Class<?> ct; 3122e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath if (t == Object.class) { 3132e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath // no change, ever 3142e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath } else if (!t.isPrimitive()) { 3152e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath switch (how) { 3162e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath case UNWRAP: 3172e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath ct = Wrapper.asPrimitiveType(t); 3182e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath if (ct != t) return ct; 3192e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath break; 3202e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath case RAW_RETURN: 3212e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath case ERASE: 3222e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath return Object.class; 3232e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath } 3242e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath } else if (t == void.class) { 3252e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath // no change, usually 3262e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath switch (how) { 3272e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath case RAW_RETURN: 3282e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath return int.class; 3292e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath case WRAP: 3302e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath return Void.class; 3312e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath } 3322e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath } else { 3332e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath // non-void primitive 3342e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath switch (how) { 3352e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath case WRAP: 3362e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath return Wrapper.asWrapperType(t); 3372e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath case INTS: 3382e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath if (t == int.class || t == long.class) 3392e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath return null; // no change 3402e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath if (t == double.class) 3412e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath return long.class; 3422e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath return int.class; 3432e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath case LONGS: 3442e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath if (t == long.class) 3452e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath return null; // no change 3462e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath return long.class; 3472e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath case RAW_RETURN: 3482e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath if (t == int.class || t == long.class || 3492e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath t == float.class || t == double.class) 3502e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath return null; // no change 3512e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath // everything else returns as an int 3522e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath return int.class; 3532e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath } 3542e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath } 3552e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath // no change; return null to signify 3562e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath return null; 3572e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath } 3582e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath 3592e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath /** Canonicalize each param type in the given array. 3602e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath * Return null if all types are already canonicalized. 3612e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath */ 3622e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath static Class<?>[] canonicalizeAll(Class<?>[] ts, int how) { 3632e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath Class<?>[] cs = null; 3642e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath for (int imax = ts.length, i = 0; i < imax; i++) { 3652e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath Class<?> c = canonicalize(ts[i], how); 3662e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath if (c == void.class) 3672e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath c = null; // a Void parameter was unwrapped to void; ignore 3682e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath if (c != null) { 3692e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath if (cs == null) 3702e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath cs = ts.clone(); 3712e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath cs[i] = c; 3722e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath } 3732e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath } 3742e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath return cs; 3752e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath } 3762e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath 3772e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath @Override 3782e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath public String toString() { 3792e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath return "Form"+erasedType; 3802e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath } 3812e439dc50d112c37a4def2d60e3d937a89bfe6caNarayan Kamath} 382