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| 1 | /* | ||
| 2 | * Copyright (c) 1994, 2003, 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 java.io.PrintStream; | ||
| 31 | import java.util.Hashtable; | ||
| 32 | |||
| 33 | /** | ||
| 34 | * WARNING: The contents of this source file are not part of any | ||
| 35 | * supported API. Code that depends on them does so at its own risk: | ||
| 36 | * they are subject to change or removal without notice. | ||
| 37 | */ | ||
| 38 | public | ||
| 39 | class ThrowStatement extends Statement { | ||
| 40 | Expression expr; | ||
| 41 | |||
| 42 | /** | ||
| 43 | * Constructor | ||
| 44 | */ | ||
| 45 | public ThrowStatement(long where, Expression expr) { | ||
| 46 | super(THROW, where); | ||
| 47 | this.expr = expr; | ||
| 48 | } | ||
| 49 | |||
| 50 | /** | ||
| 51 | * Check statement | ||
| 52 | */ | ||
| 53 | Vset check(Environment env, Context ctx, Vset vset, Hashtable exp) { | ||
| 54 | checkLabel(env, ctx); | ||
| 55 | try { | ||
| 56 | vset = reach(env, vset); | ||
| 57 | expr.checkValue(env, ctx, vset, exp); | ||
| 58 | if (expr.type.isType(TC_CLASS)) { | ||
| 59 | ClassDeclaration c = env.getClassDeclaration(expr.type); | ||
| 60 | if (exp.get(c) == null) { | ||
| 61 | exp.put(c, this); | ||
| 62 | } | ||
| 63 | ClassDefinition def = c.getClassDefinition(env); | ||
| 64 | ClassDeclaration throwable = | ||
| 65 | env.getClassDeclaration(idJavaLangThrowable); | ||
| 66 | if (!def.subClassOf(env, throwable)) { | ||
| 67 | env.error(where, "throw.not.throwable", def); | ||
| 68 | } | ||
| 69 | expr = convert(env, ctx, Type.tObject, expr); | ||
| 70 | } else if (!expr.type.isType(TC_ERROR)) { | ||
| 71 | env.error(expr.where, "throw.not.throwable", expr.type); | ||
| 72 | } | ||
| 73 | } catch (ClassNotFound e) { | ||
| 74 | env.error(where, "class.not.found", e.name, opNames[op]); | ||
| 75 | } | ||
| 76 | CheckContext exitctx = ctx.getTryExitContext(); | ||
| 77 | if (exitctx != null) { | ||
| 78 | exitctx.vsTryExit = exitctx.vsTryExit.join(vset); | ||
| 79 | } | ||
| 80 | return DEAD_END; | ||
| 81 | } | ||
| 82 | |||
| 83 | /** | ||
| 84 | * Inline | ||
| 85 | */ | ||
| 86 | public Statement inline(Environment env, Context ctx) { | ||
| 87 | expr = expr.inlineValue(env, ctx); | ||
| 88 | return this; | ||
| 89 | } | ||
| 90 | |||
| 91 | /** | ||
| 92 | * Create a copy of the statement for method inlining | ||
| 93 | */ | ||
| 94 | public Statement copyInline(Context ctx, boolean valNeeded) { | ||
| 95 | ThrowStatement s = (ThrowStatement)clone(); | ||
| 96 | s.expr = expr.copyInline(ctx); | ||
| 97 | return s; | ||
| 98 | } | ||
| 99 | |||
| 100 | /** | ||
| 101 | * The cost of inlining this statement | ||
| 102 | */ | ||
| 103 | public int costInline(int thresh, Environment env, Context ctx) { | ||
| 104 | return 1 + expr.costInline(thresh, env, ctx); | ||
| 105 | } | ||
| 106 | |||
| 107 | /** | ||
| 108 | * Code | ||
| 109 | */ | ||
| 110 | public void code(Environment env, Context ctx, Assembler asm) { | ||
| 111 | expr.codeValue(env, ctx, asm); | ||
| 112 | asm.add(where, opc_athrow); | ||
| 113 | } | ||
| 114 | |||
| 115 | /** | ||
| 116 | |||
| 117 | */ | ||
| 118 | public void print(PrintStream out, int indent) { | ||
| 119 | super.print(out, indent); | ||
| 120 | out.print("throw "); | ||
| 121 | expr.print(out); | ||
| 122 | out.print(":"); | ||
| 123 | } | ||
| 124 | } | ||