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| 1 | /* | ||
| 2 | * Copyright (c) 1994, 2004, Oracle and/or its affiliates. All rights reserved. | ||
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | ||
| 4 | * | ||
| 5 | * This code is free software; you can redistribute it and/or modify it | ||
| 6 | * under the terms of the GNU General Public License version 2 only, as | ||
| 7 | * published by the Free Software Foundation. Oracle designates this | ||
| 8 | * particular file as subject to the "Classpath" exception as provided | ||
| 9 | * by Oracle in the LICENSE file that accompanied this code. | ||
| 10 | * | ||
| 11 | * This code is distributed in the hope that it will be useful, but WITHOUT | ||
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | ||
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | ||
| 14 | * version 2 for more details (a copy is included in the LICENSE file that | ||
| 15 | * accompanied this code). | ||
| 16 | * | ||
| 17 | * You should have received a copy of the GNU General Public License version | ||
| 18 | * 2 along with this work; if not, write to the Free Software Foundation, | ||
| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | ||
| 20 | * | ||
| 21 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | ||
| 22 | * or visit www.oracle.com if you need additional information or have any | ||
| 23 | * questions. | ||
| 24 | */ | ||
| 25 | |||
| 26 | package sun.tools.tree; | ||
| 27 | |||
| 28 | import sun.tools.java.*; | ||
| 29 | import sun.tools.asm.Assembler; | ||
| 30 | import sun.tools.asm.LocalVariable; | ||
| 31 | import sun.tools.asm.Label; | ||
| 32 | import java.io.PrintStream; | ||
| 33 | import java.util.Hashtable; | ||
| 34 | |||
| 35 | /** | ||
| 36 | * WARNING: The contents of this source file are not part of any | ||
| 37 | * supported API. Code that depends on them does so at its own risk: | ||
| 38 | * they are subject to change or removal without notice. | ||
| 39 | */ | ||
| 40 | public | ||
| 41 | class CatchStatement extends Statement { | ||
| 42 | int mod; | ||
| 43 | Expression texpr; | ||
| 44 | Identifier id; | ||
| 45 | Statement body; | ||
| 46 | LocalMember field; | ||
| 47 | |||
| 48 | /** | ||
| 49 | * Constructor | ||
| 50 | */ | ||
| 51 | public CatchStatement(long where, Expression texpr, IdentifierToken id, Statement body) { | ||
| 52 | super(CATCH, where); | ||
| 53 | this.mod = id.getModifiers(); | ||
| 54 | this.texpr = texpr; | ||
| 55 | this.id = id.getName(); | ||
| 56 | this.body = body; | ||
| 57 | } | ||
| 58 | /** @deprecated */ | ||
| 59 | @Deprecated | ||
| 60 | public CatchStatement(long where, Expression texpr, Identifier id, Statement body) { | ||
| 61 | super(CATCH, where); | ||
| 62 | this.texpr = texpr; | ||
| 63 | this.id = id; | ||
| 64 | this.body = body; | ||
| 65 | } | ||
| 66 | |||
| 67 | /** | ||
| 68 | * Check statement | ||
| 69 | */ | ||
| 70 | Vset check(Environment env, Context ctx, Vset vset, Hashtable exp) { | ||
| 71 | vset = reach(env, vset); | ||
| 72 | ctx = new Context(ctx, this); | ||
| 73 | Type type = texpr.toType(env, ctx); | ||
| 74 | |||
| 75 | try { | ||
| 76 | if (ctx.getLocalField(id) != null) { | ||
| 77 | env.error(where, "local.redefined", id); | ||
| 78 | } | ||
| 79 | |||
| 80 | if (type.isType(TC_ERROR)) { | ||
| 81 | // error message printed out elsewhere | ||
| 82 | } else if (!type.isType(TC_CLASS)) { | ||
| 83 | env.error(where, "catch.not.throwable", type); | ||
| 84 | } else { | ||
| 85 | ClassDefinition def = env.getClassDefinition(type); | ||
| 86 | if (!def.subClassOf(env, | ||
| 87 | env.getClassDeclaration(idJavaLangThrowable))) { | ||
| 88 | env.error(where, "catch.not.throwable", def); | ||
| 89 | } | ||
| 90 | } | ||
| 91 | |||
| 92 | field = new LocalMember(where, ctx.field.getClassDefinition(), mod, type, id); | ||
| 93 | ctx.declare(env, field); | ||
| 94 | vset.addVar(field.number); | ||
| 95 | |||
| 96 | return body.check(env, ctx, vset, exp); | ||
| 97 | } catch (ClassNotFound e) { | ||
| 98 | env.error(where, "class.not.found", e.name, opNames[op]); | ||
| 99 | return vset; | ||
| 100 | } | ||
| 101 | } | ||
| 102 | |||
| 103 | /** | ||
| 104 | * Inline | ||
| 105 | */ | ||
| 106 | public Statement inline(Environment env, Context ctx) { | ||
| 107 | ctx = new Context(ctx, this); | ||
| 108 | if (field.isUsed()) { | ||
| 109 | ctx.declare(env, field); | ||
| 110 | } | ||
| 111 | if (body != null) { | ||
| 112 | body = body.inline(env, ctx); | ||
| 113 | } | ||
| 114 | return this; | ||
| 115 | } | ||
| 116 | |||
| 117 | /** | ||
| 118 | * Create a copy of the statement for method inlining | ||
| 119 | */ | ||
| 120 | public Statement copyInline(Context ctx, boolean valNeeded) { | ||
| 121 | CatchStatement s = (CatchStatement)clone(); | ||
| 122 | if (body != null) { | ||
| 123 | s.body = body.copyInline(ctx, valNeeded); | ||
| 124 | } | ||
| 125 | if (field != null) { | ||
| 126 | s.field = field.copyInline(ctx); | ||
| 127 | } | ||
| 128 | return s; | ||
| 129 | } | ||
| 130 | |||
| 131 | /** | ||
| 132 | * Compute cost of inlining this statement | ||
| 133 | */ | ||
| 134 | public int costInline(int thresh, Environment env, Context ctx){ | ||
| 135 | int cost = 1; | ||
| 136 | if (body != null) { | ||
| 137 | cost += body.costInline(thresh, env,ctx); | ||
| 138 | } | ||
| 139 | return cost; | ||
| 140 | } | ||
| 141 | |||
| 142 | /** | ||
| 143 | * Code | ||
| 144 | */ | ||
| 145 | public void code(Environment env, Context ctx, Assembler asm) { | ||
| 146 | CodeContext newctx = new CodeContext(ctx, this); | ||
| 147 | if (field.isUsed()) { | ||
| 148 | newctx.declare(env, field); | ||
| 149 | asm.add(where, opc_astore, new LocalVariable(field, field.number)); | ||
| 150 | } else { | ||
| 151 | asm.add(where, opc_pop); | ||
| 152 | } | ||
| 153 | if (body != null) { | ||
| 154 | body.code(env, newctx, asm); | ||
| 155 | } | ||
| 156 | //asm.add(newctx.breakLabel); | ||
| 157 | } | ||
| 158 | |||
| 159 | /** | ||
| 160 | |||
| 161 | */ | ||
| 162 | public void print(PrintStream out, int indent) { | ||
| 163 | super.print(out, indent); | ||
| 164 | out.print("catch ("); | ||
| 165 | texpr.print(out); | ||
| 166 | out.print(" " + id + ") "); | ||
| 167 | if (body != null) { | ||
| 168 | body.print(out, indent); | ||
| 169 | } else { | ||
| 170 | out.print("<empty>"); | ||
| 171 | } | ||
| 172 | } | ||
| 173 | } | ||