author | sundar |
Fri, 11 May 2012 20:06:00 +0530 | |
changeset 12716 | 5a41387068a8 |
parent 12333 | 7b02d0529a97 |
child 13273 | d597bc5e3935 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 1999, 2012, Oracle and/or its affiliates. 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. Oracle designates this |
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* particular file as subject to the "Classpath" exception as provided |
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* by Oracle in the LICENSE file that accompanied this code. |
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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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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//todo: one might eliminate uninits.andSets when monotonic |
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package com.sun.tools.javac.comp; |
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import java.util.HashMap; |
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import com.sun.tools.javac.code.*; |
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import com.sun.tools.javac.tree.*; |
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import com.sun.tools.javac.util.*; |
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import com.sun.tools.javac.util.JCDiagnostic.DiagnosticPosition; |
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import com.sun.tools.javac.code.Symbol.*; |
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import com.sun.tools.javac.tree.JCTree.*; |
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import static com.sun.tools.javac.code.Flags.*; |
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import static com.sun.tools.javac.code.Flags.BLOCK; |
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import static com.sun.tools.javac.code.Kinds.*; |
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import static com.sun.tools.javac.code.TypeTags.*; |
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import static com.sun.tools.javac.tree.JCTree.Tag.*; |
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/** This pass implements dataflow analysis for Java programs. |
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* Liveness analysis checks that every statement is reachable. |
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* Exception analysis ensures that every checked exception that is |
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* thrown is declared or caught. Definite assignment analysis |
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* ensures that each variable is assigned when used. Definite |
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* unassignment analysis ensures that no final variable is assigned |
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* more than once. |
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* |
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* <p>The JLS has a number of problems in the |
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* specification of these flow analysis problems. This implementation |
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* attempts to address those issues. |
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* |
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* <p>First, there is no accommodation for a finally clause that cannot |
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* complete normally. For liveness analysis, an intervening finally |
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* clause can cause a break, continue, or return not to reach its |
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* target. For exception analysis, an intervening finally clause can |
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* cause any exception to be "caught". For DA/DU analysis, the finally |
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* clause can prevent a transfer of control from propagating DA/DU |
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* state to the target. In addition, code in the finally clause can |
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* affect the DA/DU status of variables. |
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* |
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* <p>For try statements, we introduce the idea of a variable being |
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* definitely unassigned "everywhere" in a block. A variable V is |
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* "unassigned everywhere" in a block iff it is unassigned at the |
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* beginning of the block and there is no reachable assignment to V |
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* in the block. An assignment V=e is reachable iff V is not DA |
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* after e. Then we can say that V is DU at the beginning of the |
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* catch block iff V is DU everywhere in the try block. Similarly, V |
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* is DU at the beginning of the finally block iff V is DU everywhere |
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* in the try block and in every catch block. Specifically, the |
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* following bullet is added to 16.2.2 |
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* <pre> |
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* V is <em>unassigned everywhere</em> in a block if it is |
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* unassigned before the block and there is no reachable |
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* assignment to V within the block. |
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* </pre> |
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* <p>In 16.2.15, the third bullet (and all of its sub-bullets) for all |
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* try blocks is changed to |
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* <pre> |
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* V is definitely unassigned before a catch block iff V is |
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* definitely unassigned everywhere in the try block. |
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* </pre> |
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* <p>The last bullet (and all of its sub-bullets) for try blocks that |
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* have a finally block is changed to |
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* <pre> |
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* V is definitely unassigned before the finally block iff |
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* V is definitely unassigned everywhere in the try block |
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* and everywhere in each catch block of the try statement. |
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* </pre> |
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* <p>In addition, |
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* <pre> |
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* V is definitely assigned at the end of a constructor iff |
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* V is definitely assigned after the block that is the body |
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* of the constructor and V is definitely assigned at every |
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* return that can return from the constructor. |
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* </pre> |
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* <p>In addition, each continue statement with the loop as its target |
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* is treated as a jump to the end of the loop body, and "intervening" |
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* finally clauses are treated as follows: V is DA "due to the |
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* continue" iff V is DA before the continue statement or V is DA at |
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* the end of any intervening finally block. V is DU "due to the |
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* continue" iff any intervening finally cannot complete normally or V |
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* is DU at the end of every intervening finally block. This "due to |
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* the continue" concept is then used in the spec for the loops. |
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* |
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* <p>Similarly, break statements must consider intervening finally |
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* blocks. For liveness analysis, a break statement for which any |
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* intervening finally cannot complete normally is not considered to |
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* cause the target statement to be able to complete normally. Then |
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* we say V is DA "due to the break" iff V is DA before the break or |
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* V is DA at the end of any intervening finally block. V is DU "due |
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* to the break" iff any intervening finally cannot complete normally |
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* or V is DU at the break and at the end of every intervening |
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* finally block. (I suspect this latter condition can be |
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* simplified.) This "due to the break" is then used in the spec for |
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* all statements that can be "broken". |
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* |
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* <p>The return statement is treated similarly. V is DA "due to a |
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* return statement" iff V is DA before the return statement or V is |
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* DA at the end of any intervening finally block. Note that we |
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* don't have to worry about the return expression because this |
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* concept is only used for construcrors. |
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* |
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* <p>There is no spec in the JLS for when a variable is definitely |
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* assigned at the end of a constructor, which is needed for final |
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* fields (8.3.1.2). We implement the rule that V is DA at the end |
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* of the constructor iff it is DA and the end of the body of the |
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* constructor and V is DA "due to" every return of the constructor. |
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* |
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* <p>Intervening finally blocks similarly affect exception analysis. An |
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* intervening finally that cannot complete normally allows us to ignore |
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* an otherwise uncaught exception. |
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* |
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* <p>To implement the semantics of intervening finally clauses, all |
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* nonlocal transfers (break, continue, return, throw, method call that |
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* can throw a checked exception, and a constructor invocation that can |
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* thrown a checked exception) are recorded in a queue, and removed |
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* from the queue when we complete processing the target of the |
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* nonlocal transfer. This allows us to modify the queue in accordance |
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* with the above rules when we encounter a finally clause. The only |
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* exception to this [no pun intended] is that checked exceptions that |
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* are known to be caught or declared to be caught in the enclosing |
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* method are not recorded in the queue, but instead are recorded in a |
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* global variable "Set<Type> thrown" that records the type of all |
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* exceptions that can be thrown. |
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* |
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* <p>Other minor issues the treatment of members of other classes |
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* (always considered DA except that within an anonymous class |
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* constructor, where DA status from the enclosing scope is |
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* preserved), treatment of the case expression (V is DA before the |
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* case expression iff V is DA after the switch expression), |
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* treatment of variables declared in a switch block (the implied |
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* DA/DU status after the switch expression is DU and not DA for |
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* variables defined in a switch block), the treatment of boolean ?: |
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* expressions (The JLS rules only handle b and c non-boolean; the |
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* new rule is that if b and c are boolean valued, then V is |
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* (un)assigned after a?b:c when true/false iff V is (un)assigned |
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* after b when true/false and V is (un)assigned after c when |
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* true/false). |
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* |
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* <p>There is the remaining question of what syntactic forms constitute a |
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* reference to a variable. It is conventional to allow this.x on the |
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* left-hand-side to initialize a final instance field named x, yet |
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* this.x isn't considered a "use" when appearing on a right-hand-side |
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* in most implementations. Should parentheses affect what is |
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* considered a variable reference? The simplest rule would be to |
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* allow unqualified forms only, parentheses optional, and phase out |
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* support for assigning to a final field via this.x. |
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* |
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* <p><b>This is NOT part of any supported API. |
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* If you write code that depends on this, you do so at your own risk. |
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* This code and its internal interfaces are subject to change or |
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* deletion without notice.</b> |
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*/ |
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public class Flow { |
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protected static final Context.Key<Flow> flowKey = |
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new Context.Key<Flow>(); |
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private final Names names; |
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private final Log log; |
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private final Symtab syms; |
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private final Types types; |
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private final Check chk; |
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private TreeMaker make; |
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private final Resolve rs; |
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private Env<AttrContext> attrEnv; |
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private Lint lint; |
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private final boolean allowImprovedRethrowAnalysis; |
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private final boolean allowImprovedCatchAnalysis; |
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public static Flow instance(Context context) { |
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Flow instance = context.get(flowKey); |
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if (instance == null) |
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instance = new Flow(context); |
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return instance; |
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} |
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public void analyzeTree(Env<AttrContext> env, TreeMaker make) { |
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new FlowAnalyzer().analyzeTree(env, make); |
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new AssignAnalyzer().analyzeTree(env, make); |
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} |
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protected Flow(Context context) { |
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context.put(flowKey, this); |
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names = Names.instance(context); |
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log = Log.instance(context); |
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syms = Symtab.instance(context); |
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types = Types.instance(context); |
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chk = Check.instance(context); |
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lint = Lint.instance(context); |
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rs = Resolve.instance(context); |
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Source source = Source.instance(context); |
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allowImprovedRethrowAnalysis = source.allowImprovedRethrowAnalysis(); |
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allowImprovedCatchAnalysis = source.allowImprovedCatchAnalysis(); |
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} |
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/** |
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* Base visitor class for all visitors implementing dataflow analysis logic. |
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* This class define the shared logic for handling jumps (break/continue statements). |
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*/ |
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static abstract class BaseAnalyzer<P extends BaseAnalyzer.PendingExit> extends TreeScanner { |
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enum JumpKind { |
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BREAK(JCTree.Tag.BREAK) { |
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@Override |
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JCTree getTarget(JCTree tree) { |
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return ((JCBreak)tree).target; |
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} |
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}, |
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CONTINUE(JCTree.Tag.CONTINUE) { |
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@Override |
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JCTree getTarget(JCTree tree) { |
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return ((JCContinue)tree).target; |
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} |
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}; |
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JCTree.Tag treeTag; |
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private JumpKind(Tag treeTag) { |
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this.treeTag = treeTag; |
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} |
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abstract JCTree getTarget(JCTree tree); |
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} |
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/** The currently pending exits that go from current inner blocks |
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* to an enclosing block, in source order. |
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*/ |
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ListBuffer<P> pendingExits; |
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/** A pending exit. These are the statements return, break, and |
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* continue. In addition, exception-throwing expressions or |
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* statements are put here when not known to be caught. This |
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* will typically result in an error unless it is within a |
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* try-finally whose finally block cannot complete normally. |
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*/ |
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abstract static class PendingExit { |
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JCTree tree; |
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PendingExit(JCTree tree) { |
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this.tree = tree; |
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} |
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abstract void resolveJump(); |
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} |
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abstract void markDead(); |
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/** Record an outward transfer of control. */ |
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void recordExit(JCTree tree, P pe) { |
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pendingExits.append(pe); |
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markDead(); |
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} |
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/** Resolve all jumps of this statement. */ |
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private boolean resolveJump(JCTree tree, |
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ListBuffer<P> oldPendingExits, |
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JumpKind jk) { |
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boolean resolved = false; |
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List<P> exits = pendingExits.toList(); |
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pendingExits = oldPendingExits; |
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for (; exits.nonEmpty(); exits = exits.tail) { |
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P exit = exits.head; |
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if (exit.tree.hasTag(jk.treeTag) && |
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jk.getTarget(exit.tree) == tree) { |
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exit.resolveJump(); |
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resolved = true; |
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} else { |
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pendingExits.append(exit); |
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} |
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} |
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return resolved; |
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} |
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/** Resolve all breaks of this statement. */ |
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boolean resolveContinues(JCTree tree) { |
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return resolveJump(tree, new ListBuffer<P>(), JumpKind.CONTINUE); |
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} |
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/** Resolve all continues of this statement. */ |
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boolean resolveBreaks(JCTree tree, ListBuffer<P> oldPendingExits) { |
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return resolveJump(tree, oldPendingExits, JumpKind.BREAK); |
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} |
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} |
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/** |
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* This pass implements the first two steps of the dataflow analysis: |
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* (i) liveness analysis checks that every statement is reachable and (ii) |
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* exception analysis to ensure that every checked exception that is |
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* thrown is declared or caught. |
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*/ |
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class FlowAnalyzer extends BaseAnalyzer<FlowAnalyzer.FlowPendingExit> { |
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|
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/** A flag that indicates whether the last statement could |
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* complete normally. |
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*/ |
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private boolean alive; |
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HashMap<Symbol, List<Type>> preciseRethrowTypes; |
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/** The current class being defined. |
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*/ |
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JCClassDecl classDef; |
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/** The list of possibly thrown declarable exceptions. |
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*/ |
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List<Type> thrown; |
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|
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/** The list of exceptions that are either caught or declared to be |
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* thrown. |
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*/ |
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List<Type> caught; |
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class FlowPendingExit extends BaseAnalyzer.PendingExit { |
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Type thrown; |
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FlowPendingExit(JCTree tree, Type thrown) { |
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super(tree); |
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this.thrown = thrown; |
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} |
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void resolveJump() { /*do nothing*/ } |
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} |
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@Override |
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void markDead() { |
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alive = false; |
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} |
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/*-------------------- Exceptions ----------------------*/ |
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/** Complain that pending exceptions are not caught. |
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*/ |
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void errorUncaught() { |
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for (FlowPendingExit exit = pendingExits.next(); |
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exit != null; |
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exit = pendingExits.next()) { |
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if (classDef != null && |
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classDef.pos == exit.tree.pos) { |
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log.error(exit.tree.pos(), |
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"unreported.exception.default.constructor", |
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exit.thrown); |
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} else if (exit.tree.hasTag(VARDEF) && |
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((JCVariableDecl)exit.tree).sym.isResourceVariable()) { |
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log.error(exit.tree.pos(), |
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"unreported.exception.implicit.close", |
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exit.thrown, |
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((JCVariableDecl)exit.tree).sym.name); |
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} else { |
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log.error(exit.tree.pos(), |
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"unreported.exception.need.to.catch.or.throw", |
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exit.thrown); |
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} |
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} |
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} |
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/** Record that exception is potentially thrown and check that it |
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* is caught. |
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*/ |
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386 |
void markThrown(JCTree tree, Type exc) { |
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387 |
if (!chk.isUnchecked(tree.pos(), exc)) { |
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388 |
if (!chk.isHandled(exc, caught)) |
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389 |
pendingExits.append(new FlowPendingExit(tree, exc)); |
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390 |
thrown = chk.incl(exc, thrown); |
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391 |
} |
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392 |
} |
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|
393 |
|
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394 |
/************************************************************************* |
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395 |
* Visitor methods for statements and definitions |
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396 |
*************************************************************************/ |
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|
397 |
|
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398 |
/** Analyze a definition. |
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|
399 |
*/ |
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400 |
void scanDef(JCTree tree) { |
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401 |
scanStat(tree); |
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402 |
if (tree != null && tree.hasTag(JCTree.Tag.BLOCK) && !alive) { |
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403 |
log.error(tree.pos(), |
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404 |
"initializer.must.be.able.to.complete.normally"); |
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|
405 |
} |
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|
406 |
} |
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changeset
|
407 |
|
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408 |
/** Analyze a statement. Check that statement is reachable. |
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409 |
*/ |
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410 |
void scanStat(JCTree tree) { |
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411 |
if (!alive && tree != null) { |
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412 |
log.error(tree.pos(), "unreachable.stmt"); |
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413 |
if (!tree.hasTag(SKIP)) alive = true; |
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414 |
} |
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415 |
scan(tree); |
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416 |
} |
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|
417 |
|
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418 |
/** Analyze list of statements. |
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419 |
*/ |
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420 |
void scanStats(List<? extends JCStatement> trees) { |
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421 |
if (trees != null) |
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422 |
for (List<? extends JCStatement> l = trees; l.nonEmpty(); l = l.tail) |
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423 |
scanStat(l.head); |
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|
424 |
} |
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changeset
|
425 |
|
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426 |
/* ------------ Visitor methods for various sorts of trees -------------*/ |
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|
427 |
|
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428 |
public void visitClassDef(JCClassDecl tree) { |
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|
429 |
if (tree.sym == null) return; |
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|
430 |
|
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431 |
JCClassDecl classDefPrev = classDef; |
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432 |
List<Type> thrownPrev = thrown; |
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433 |
List<Type> caughtPrev = caught; |
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434 |
boolean alivePrev = alive; |
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435 |
ListBuffer<FlowPendingExit> pendingExitsPrev = pendingExits; |
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436 |
Lint lintPrev = lint; |
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|
437 |
|
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438 |
pendingExits = new ListBuffer<FlowPendingExit>(); |
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439 |
if (tree.name != names.empty) { |
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440 |
caught = List.nil(); |
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441 |
} |
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442 |
classDef = tree; |
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443 |
thrown = List.nil(); |
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444 |
lint = lint.augment(tree.sym.attributes_field); |
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|
445 |
|
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446 |
try { |
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447 |
// process all the static initializers |
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448 |
for (List<JCTree> l = tree.defs; l.nonEmpty(); l = l.tail) { |
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449 |
if (!l.head.hasTag(METHODDEF) && |
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450 |
(TreeInfo.flags(l.head) & STATIC) != 0) { |
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|
451 |
scanDef(l.head); |
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452 |
errorUncaught(); |
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|
453 |
} |
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|
454 |
} |
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|
455 |
|
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456 |
// add intersection of all thrown clauses of initial constructors |
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457 |
// to set of caught exceptions, unless class is anonymous. |
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458 |
if (tree.name != names.empty) { |
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459 |
boolean firstConstructor = true; |
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|
460 |
for (List<JCTree> l = tree.defs; l.nonEmpty(); l = l.tail) { |
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|
461 |
if (TreeInfo.isInitialConstructor(l.head)) { |
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462 |
List<Type> mthrown = |
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463 |
((JCMethodDecl) l.head).sym.type.getThrownTypes(); |
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|
464 |
if (firstConstructor) { |
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|
465 |
caught = mthrown; |
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|
466 |
firstConstructor = false; |
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|
467 |
} else { |
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|
468 |
caught = chk.intersect(mthrown, caught); |
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|
469 |
} |
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changeset
|
470 |
} |
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changeset
|
471 |
} |
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|
472 |
} |
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changeset
|
473 |
|
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|
474 |
// process all the instance initializers |
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|
475 |
for (List<JCTree> l = tree.defs; l.nonEmpty(); l = l.tail) { |
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|
476 |
if (!l.head.hasTag(METHODDEF) && |
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|
477 |
(TreeInfo.flags(l.head) & STATIC) == 0) { |
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|
478 |
scanDef(l.head); |
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|
479 |
errorUncaught(); |
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|
480 |
} |
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changeset
|
481 |
} |
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changeset
|
482 |
|
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|
483 |
// in an anonymous class, add the set of thrown exceptions to |
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|
484 |
// the throws clause of the synthetic constructor and propagate |
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|
485 |
// outwards. |
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|
486 |
// Changing the throws clause on the fly is okay here because |
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|
487 |
// the anonymous constructor can't be invoked anywhere else, |
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488 |
// and its type hasn't been cached. |
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|
489 |
if (tree.name == names.empty) { |
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|
490 |
for (List<JCTree> l = tree.defs; l.nonEmpty(); l = l.tail) { |
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|
491 |
if (TreeInfo.isInitialConstructor(l.head)) { |
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|
492 |
JCMethodDecl mdef = (JCMethodDecl)l.head; |
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|
493 |
mdef.thrown = make.Types(thrown); |
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|
494 |
mdef.sym.type = types.createMethodTypeWithThrown(mdef.sym.type, thrown); |
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|
495 |
} |
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changeset
|
496 |
} |
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|
497 |
thrownPrev = chk.union(thrown, thrownPrev); |
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changeset
|
498 |
} |
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changeset
|
499 |
|
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|
500 |
// process all the methods |
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|
501 |
for (List<JCTree> l = tree.defs; l.nonEmpty(); l = l.tail) { |
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|
502 |
if (l.head.hasTag(METHODDEF)) { |
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|
503 |
scan(l.head); |
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changeset
|
504 |
errorUncaught(); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
505 |
} |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
506 |
} |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
507 |
|
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
508 |
thrown = thrownPrev; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
509 |
} finally { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
510 |
pendingExits = pendingExitsPrev; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
511 |
alive = alivePrev; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
512 |
caught = caughtPrev; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
513 |
classDef = classDefPrev; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
514 |
lint = lintPrev; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
515 |
} |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
516 |
} |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
517 |
|
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
518 |
public void visitMethodDef(JCMethodDecl tree) { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
519 |
if (tree.body == null) return; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
520 |
|
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
521 |
List<Type> caughtPrev = caught; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
522 |
List<Type> mthrown = tree.sym.type.getThrownTypes(); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
523 |
Lint lintPrev = lint; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
524 |
|
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
525 |
lint = lint.augment(tree.sym.attributes_field); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
526 |
|
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
527 |
Assert.check(pendingExits.isEmpty()); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
528 |
|
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
529 |
try { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
530 |
for (List<JCVariableDecl> l = tree.params; l.nonEmpty(); l = l.tail) { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
531 |
JCVariableDecl def = l.head; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
532 |
scan(def); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
533 |
} |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
534 |
if (TreeInfo.isInitialConstructor(tree)) |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
535 |
caught = chk.union(caught, mthrown); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
536 |
else if ((tree.sym.flags() & (BLOCK | STATIC)) != BLOCK) |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
537 |
caught = mthrown; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
538 |
// else we are in an instance initializer block; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
539 |
// leave caught unchanged. |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
540 |
|
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
541 |
alive = true; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
542 |
scanStat(tree.body); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
543 |
|
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
544 |
if (alive && tree.sym.type.getReturnType().tag != VOID) |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
545 |
log.error(TreeInfo.diagEndPos(tree.body), "missing.ret.stmt"); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
546 |
|
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
547 |
List<FlowPendingExit> exits = pendingExits.toList(); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
548 |
pendingExits = new ListBuffer<FlowPendingExit>(); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
549 |
while (exits.nonEmpty()) { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
550 |
FlowPendingExit exit = exits.head; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
551 |
exits = exits.tail; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
552 |
if (exit.thrown == null) { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
553 |
Assert.check(exit.tree.hasTag(RETURN)); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
554 |
} else { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
555 |
// uncaught throws will be reported later |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
556 |
pendingExits.append(exit); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
557 |
} |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
558 |
} |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
559 |
} finally { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
560 |
caught = caughtPrev; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
561 |
lint = lintPrev; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
562 |
} |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
563 |
} |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
564 |
|
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
565 |
public void visitVarDef(JCVariableDecl tree) { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
566 |
if (tree.init != null) { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
567 |
Lint lintPrev = lint; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
568 |
lint = lint.augment(tree.sym.attributes_field); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
569 |
try{ |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
570 |
scan(tree.init); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
571 |
} finally { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
572 |
lint = lintPrev; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
573 |
} |
8428
1e9935b883cd
7017104: improve error reporting for uncaught/undeclared exceptions from try-with-resources
mcimadamore
parents:
8036
diff
changeset
|
574 |
} |
10 | 575 |
} |
12333
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
576 |
|
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
577 |
public void visitBlock(JCBlock tree) { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
578 |
scanStats(tree.stats); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
579 |
} |
10 | 580 |
|
12333
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
581 |
public void visitDoLoop(JCDoWhileLoop tree) { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
582 |
ListBuffer<FlowPendingExit> prevPendingExits = pendingExits; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
583 |
pendingExits = new ListBuffer<FlowPendingExit>(); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
584 |
scanStat(tree.body); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
585 |
alive |= resolveContinues(tree); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
586 |
scan(tree.cond); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
587 |
alive = alive && !tree.cond.type.isTrue(); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
588 |
alive |= resolveBreaks(tree, prevPendingExits); |
10 | 589 |
} |
590 |
||
12333
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
591 |
public void visitWhileLoop(JCWhileLoop tree) { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
592 |
ListBuffer<FlowPendingExit> prevPendingExits = pendingExits; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
593 |
pendingExits = new ListBuffer<FlowPendingExit>(); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
594 |
scan(tree.cond); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
595 |
alive = !tree.cond.type.isFalse(); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
596 |
scanStat(tree.body); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
597 |
alive |= resolveContinues(tree); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
598 |
alive = resolveBreaks(tree, prevPendingExits) || |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
599 |
!tree.cond.type.isTrue(); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
600 |
} |
10 | 601 |
|
12333
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
602 |
public void visitForLoop(JCForLoop tree) { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
603 |
ListBuffer<FlowPendingExit> prevPendingExits = pendingExits; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
604 |
scanStats(tree.init); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
605 |
pendingExits = new ListBuffer<FlowPendingExit>(); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
606 |
if (tree.cond != null) { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
607 |
scan(tree.cond); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
608 |
alive = !tree.cond.type.isFalse(); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
609 |
} else { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
610 |
alive = true; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
611 |
} |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
612 |
scanStat(tree.body); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
613 |
alive |= resolveContinues(tree); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
614 |
scan(tree.step); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
615 |
alive = resolveBreaks(tree, prevPendingExits) || |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
616 |
tree.cond != null && !tree.cond.type.isTrue(); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
617 |
} |
10 | 618 |
|
12333
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
619 |
public void visitForeachLoop(JCEnhancedForLoop tree) { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
620 |
visitVarDef(tree.var); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
621 |
ListBuffer<FlowPendingExit> prevPendingExits = pendingExits; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
622 |
scan(tree.expr); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
623 |
pendingExits = new ListBuffer<FlowPendingExit>(); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
624 |
scanStat(tree.body); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
625 |
alive |= resolveContinues(tree); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
626 |
resolveBreaks(tree, prevPendingExits); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
627 |
alive = true; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
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diff
changeset
|
628 |
} |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
629 |
|
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
630 |
public void visitLabelled(JCLabeledStatement tree) { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
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diff
changeset
|
631 |
ListBuffer<FlowPendingExit> prevPendingExits = pendingExits; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
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diff
changeset
|
632 |
pendingExits = new ListBuffer<FlowPendingExit>(); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
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diff
changeset
|
633 |
scanStat(tree.body); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
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changeset
|
634 |
alive |= resolveBreaks(tree, prevPendingExits); |
10 | 635 |
} |
12333
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
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diff
changeset
|
636 |
|
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
637 |
public void visitSwitch(JCSwitch tree) { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
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diff
changeset
|
638 |
ListBuffer<FlowPendingExit> prevPendingExits = pendingExits; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
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diff
changeset
|
639 |
pendingExits = new ListBuffer<FlowPendingExit>(); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
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diff
changeset
|
640 |
scan(tree.selector); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
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diff
changeset
|
641 |
boolean hasDefault = false; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
642 |
for (List<JCCase> l = tree.cases; l.nonEmpty(); l = l.tail) { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
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diff
changeset
|
643 |
alive = true; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
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diff
changeset
|
644 |
JCCase c = l.head; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
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diff
changeset
|
645 |
if (c.pat == null) |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
646 |
hasDefault = true; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
647 |
else |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
648 |
scan(c.pat); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
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diff
changeset
|
649 |
scanStats(c.stats); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
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diff
changeset
|
650 |
// Warn about fall-through if lint switch fallthrough enabled. |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
651 |
if (alive && |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
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diff
changeset
|
652 |
lint.isEnabled(Lint.LintCategory.FALLTHROUGH) && |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
653 |
c.stats.nonEmpty() && l.tail.nonEmpty()) |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
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diff
changeset
|
654 |
log.warning(Lint.LintCategory.FALLTHROUGH, |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
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diff
changeset
|
655 |
l.tail.head.pos(), |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
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diff
changeset
|
656 |
"possible.fall-through.into.case"); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
657 |
} |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
658 |
if (!hasDefault) { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
659 |
alive = true; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
660 |
} |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
661 |
alive |= resolveBreaks(tree, prevPendingExits); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
662 |
} |
10 | 663 |
|
12333
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
664 |
public void visitTry(JCTry tree) { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
665 |
List<Type> caughtPrev = caught; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
666 |
List<Type> thrownPrev = thrown; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
667 |
thrown = List.nil(); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
668 |
for (List<JCCatch> l = tree.catchers; l.nonEmpty(); l = l.tail) { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
669 |
List<JCExpression> subClauses = TreeInfo.isMultiCatch(l.head) ? |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
670 |
((JCTypeUnion)l.head.param.vartype).alternatives : |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
671 |
List.of(l.head.param.vartype); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
672 |
for (JCExpression ct : subClauses) { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
673 |
caught = chk.incl(ct.type, caught); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
674 |
} |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
675 |
} |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
676 |
|
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
677 |
ListBuffer<FlowPendingExit> prevPendingExits = pendingExits; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
678 |
pendingExits = new ListBuffer<FlowPendingExit>(); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
679 |
for (JCTree resource : tree.resources) { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
680 |
if (resource instanceof JCVariableDecl) { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
681 |
JCVariableDecl vdecl = (JCVariableDecl) resource; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
682 |
visitVarDef(vdecl); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
683 |
} else if (resource instanceof JCExpression) { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
684 |
scan((JCExpression) resource); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
685 |
} else { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
686 |
throw new AssertionError(tree); // parser error |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
687 |
} |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
688 |
} |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
689 |
for (JCTree resource : tree.resources) { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
690 |
List<Type> closeableSupertypes = resource.type.isCompound() ? |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
691 |
types.interfaces(resource.type).prepend(types.supertype(resource.type)) : |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
692 |
List.of(resource.type); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
693 |
for (Type sup : closeableSupertypes) { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
694 |
if (types.asSuper(sup, syms.autoCloseableType.tsym) != null) { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
695 |
Symbol closeMethod = rs.resolveQualifiedMethod(tree, |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
696 |
attrEnv, |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
697 |
sup, |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
698 |
names.close, |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
699 |
List.<Type>nil(), |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
700 |
List.<Type>nil()); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
701 |
if (closeMethod.kind == MTH) { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
702 |
for (Type t : ((MethodSymbol)closeMethod).getThrownTypes()) { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
703 |
markThrown(resource, t); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
704 |
} |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
705 |
} |
5492
515e4b33b335
6943289: Project Coin: Improved Exception Handling for Java (aka 'multicatch')
mcimadamore
parents:
3149
diff
changeset
|
706 |
} |
10 | 707 |
} |
708 |
} |
|
12333
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
709 |
scanStat(tree.body); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
710 |
List<Type> thrownInTry = allowImprovedCatchAnalysis ? |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
711 |
chk.union(thrown, List.of(syms.runtimeExceptionType, syms.errorType)) : |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
712 |
thrown; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
713 |
thrown = thrownPrev; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
714 |
caught = caughtPrev; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
715 |
boolean aliveEnd = alive; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
716 |
|
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
717 |
List<Type> caughtInTry = List.nil(); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
718 |
for (List<JCCatch> l = tree.catchers; l.nonEmpty(); l = l.tail) { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
719 |
alive = true; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
720 |
JCVariableDecl param = l.head.param; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
721 |
List<JCExpression> subClauses = TreeInfo.isMultiCatch(l.head) ? |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
722 |
((JCTypeUnion)l.head.param.vartype).alternatives : |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
723 |
List.of(l.head.param.vartype); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
724 |
List<Type> ctypes = List.nil(); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
725 |
List<Type> rethrownTypes = chk.diff(thrownInTry, caughtInTry); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
726 |
for (JCExpression ct : subClauses) { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
727 |
Type exc = ct.type; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
728 |
if (exc != syms.unknownType) { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
729 |
ctypes = ctypes.append(exc); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
730 |
if (types.isSameType(exc, syms.objectType)) |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
731 |
continue; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
732 |
checkCaughtType(l.head.pos(), exc, thrownInTry, caughtInTry); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
733 |
caughtInTry = chk.incl(exc, caughtInTry); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
734 |
} |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
735 |
} |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
736 |
scan(param); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
737 |
preciseRethrowTypes.put(param.sym, chk.intersect(ctypes, rethrownTypes)); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
738 |
scanStat(l.head.body); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
739 |
preciseRethrowTypes.remove(param.sym); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
740 |
aliveEnd |= alive; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
741 |
} |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
742 |
if (tree.finalizer != null) { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
743 |
List<Type> savedThrown = thrown; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
744 |
thrown = List.nil(); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
745 |
ListBuffer<FlowPendingExit> exits = pendingExits; |
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changeset
|
746 |
pendingExits = prevPendingExits; |
7b02d0529a97
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changeset
|
747 |
alive = true; |
7b02d0529a97
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changeset
|
748 |
scanStat(tree.finalizer); |
7b02d0529a97
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changeset
|
749 |
if (!alive) { |
7b02d0529a97
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changeset
|
750 |
// discard exits and exceptions from try and finally |
7b02d0529a97
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changeset
|
751 |
thrown = chk.union(thrown, thrownPrev); |
7b02d0529a97
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changeset
|
752 |
if (lint.isEnabled(Lint.LintCategory.FINALLY)) { |
7b02d0529a97
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changeset
|
753 |
log.warning(Lint.LintCategory.FINALLY, |
7b02d0529a97
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changeset
|
754 |
TreeInfo.diagEndPos(tree.finalizer), |
7b02d0529a97
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changeset
|
755 |
"finally.cannot.complete"); |
7b02d0529a97
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changeset
|
756 |
} |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
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diff
changeset
|
757 |
} else { |
7b02d0529a97
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diff
changeset
|
758 |
thrown = chk.union(thrown, chk.diff(thrownInTry, caughtInTry)); |
7b02d0529a97
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changeset
|
759 |
thrown = chk.union(thrown, savedThrown); |
7b02d0529a97
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changeset
|
760 |
// FIX: this doesn't preserve source order of exits in catch |
7b02d0529a97
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changeset
|
761 |
// versus finally! |
7b02d0529a97
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changeset
|
762 |
while (exits.nonEmpty()) { |
7b02d0529a97
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changeset
|
763 |
pendingExits.append(exits.next()); |
7b02d0529a97
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changeset
|
764 |
} |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
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changeset
|
765 |
alive = aliveEnd; |
7b02d0529a97
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changeset
|
766 |
} |
7b02d0529a97
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changeset
|
767 |
tree.finallyCanCompleteNormally = alive; |
7b02d0529a97
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changeset
|
768 |
} else { |
7b02d0529a97
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diff
changeset
|
769 |
thrown = chk.union(thrown, chk.diff(thrownInTry, caughtInTry)); |
7b02d0529a97
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changeset
|
770 |
alive = aliveEnd; |
7b02d0529a97
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changeset
|
771 |
ListBuffer<FlowPendingExit> exits = pendingExits; |
7b02d0529a97
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changeset
|
772 |
pendingExits = prevPendingExits; |
7b02d0529a97
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changeset
|
773 |
while (exits.nonEmpty()) pendingExits.append(exits.next()); |
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changeset
|
774 |
} |
10 | 775 |
} |
12333
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
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changeset
|
776 |
|
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
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diff
changeset
|
777 |
@Override |
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changeset
|
778 |
public void visitIf(JCIf tree) { |
7b02d0529a97
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changeset
|
779 |
scan(tree.cond); |
7b02d0529a97
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changeset
|
780 |
scanStat(tree.thenpart); |
7b02d0529a97
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changeset
|
781 |
if (tree.elsepart != null) { |
7b02d0529a97
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changeset
|
782 |
boolean aliveAfterThen = alive; |
7b02d0529a97
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changeset
|
783 |
alive = true; |
7b02d0529a97
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diff
changeset
|
784 |
scanStat(tree.elsepart); |
7b02d0529a97
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changeset
|
785 |
alive = alive | aliveAfterThen; |
7b02d0529a97
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changeset
|
786 |
} else { |
7b02d0529a97
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changeset
|
787 |
alive = true; |
7b02d0529a97
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diff
changeset
|
788 |
} |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
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diff
changeset
|
789 |
} |
10 | 790 |
|
12333
7b02d0529a97
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changeset
|
791 |
void checkCaughtType(DiagnosticPosition pos, Type exc, List<Type> thrownInTry, List<Type> caughtInTry) { |
7b02d0529a97
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changeset
|
792 |
if (chk.subset(exc, caughtInTry)) { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
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changeset
|
793 |
log.error(pos, "except.already.caught", exc); |
7b02d0529a97
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changeset
|
794 |
} else if (!chk.isUnchecked(pos, exc) && |
7b02d0529a97
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changeset
|
795 |
!isExceptionOrThrowable(exc) && |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
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changeset
|
796 |
!chk.intersects(exc, thrownInTry)) { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
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diff
changeset
|
797 |
log.error(pos, "except.never.thrown.in.try", exc); |
7b02d0529a97
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changeset
|
798 |
} else if (allowImprovedCatchAnalysis) { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
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changeset
|
799 |
List<Type> catchableThrownTypes = chk.intersect(List.of(exc), thrownInTry); |
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changeset
|
800 |
// 'catchableThrownTypes' cannnot possibly be empty - if 'exc' was an |
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changeset
|
801 |
// unchecked exception, the result list would not be empty, as the augmented |
7b02d0529a97
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changeset
|
802 |
// thrown set includes { RuntimeException, Error }; if 'exc' was a checked |
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changeset
|
803 |
// exception, that would have been covered in the branch above |
7b02d0529a97
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diff
changeset
|
804 |
if (chk.diff(catchableThrownTypes, caughtInTry).isEmpty() && |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
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changeset
|
805 |
!isExceptionOrThrowable(exc)) { |
7b02d0529a97
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changeset
|
806 |
String key = catchableThrownTypes.length() == 1 ? |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
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changeset
|
807 |
"unreachable.catch" : |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
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changeset
|
808 |
"unreachable.catch.1"; |
7b02d0529a97
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changeset
|
809 |
log.warning(pos, key, catchableThrownTypes); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
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diff
changeset
|
810 |
} |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
811 |
} |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
812 |
} |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
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diff
changeset
|
813 |
//where |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
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diff
changeset
|
814 |
private boolean isExceptionOrThrowable(Type exc) { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
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diff
changeset
|
815 |
return exc.tsym == syms.throwableType.tsym || |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
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changeset
|
816 |
exc.tsym == syms.exceptionType.tsym; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
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diff
changeset
|
817 |
} |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
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diff
changeset
|
818 |
|
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
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diff
changeset
|
819 |
public void visitBreak(JCBreak tree) { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
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changeset
|
820 |
recordExit(tree, new FlowPendingExit(tree, null)); |
7b02d0529a97
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diff
changeset
|
821 |
} |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
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diff
changeset
|
822 |
|
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
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changeset
|
823 |
public void visitContinue(JCContinue tree) { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
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changeset
|
824 |
recordExit(tree, new FlowPendingExit(tree, null)); |
7b02d0529a97
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diff
changeset
|
825 |
} |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
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diff
changeset
|
826 |
|
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
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diff
changeset
|
827 |
public void visitReturn(JCReturn tree) { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
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changeset
|
828 |
scan(tree.expr); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
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changeset
|
829 |
// if not initial constructor, should markDead instead of recordExit |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
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changeset
|
830 |
recordExit(tree, new FlowPendingExit(tree, null)); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
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diff
changeset
|
831 |
} |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
832 |
|
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
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diff
changeset
|
833 |
public void visitThrow(JCThrow tree) { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
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changeset
|
834 |
scan(tree.expr); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
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changeset
|
835 |
Symbol sym = TreeInfo.symbol(tree.expr); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
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changeset
|
836 |
if (sym != null && |
7b02d0529a97
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mcimadamore
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diff
changeset
|
837 |
sym.kind == VAR && |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
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diff
changeset
|
838 |
(sym.flags() & (FINAL | EFFECTIVELY_FINAL)) != 0 && |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
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diff
changeset
|
839 |
preciseRethrowTypes.get(sym) != null && |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
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diff
changeset
|
840 |
allowImprovedRethrowAnalysis) { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
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diff
changeset
|
841 |
for (Type t : preciseRethrowTypes.get(sym)) { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
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diff
changeset
|
842 |
markThrown(tree, t); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
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diff
changeset
|
843 |
} |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
844 |
} |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
845 |
else { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
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diff
changeset
|
846 |
markThrown(tree, tree.expr.type); |
7b02d0529a97
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changeset
|
847 |
} |
7b02d0529a97
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mcimadamore
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diff
changeset
|
848 |
markDead(); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
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diff
changeset
|
849 |
} |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
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diff
changeset
|
850 |
|
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
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diff
changeset
|
851 |
public void visitApply(JCMethodInvocation tree) { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
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diff
changeset
|
852 |
scan(tree.meth); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
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diff
changeset
|
853 |
scan(tree.args); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
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diff
changeset
|
854 |
for (List<Type> l = tree.meth.type.getThrownTypes(); l.nonEmpty(); l = l.tail) |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
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changeset
|
855 |
markThrown(tree, l.head); |
7b02d0529a97
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mcimadamore
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diff
changeset
|
856 |
} |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
857 |
|
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
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diff
changeset
|
858 |
public void visitNewClass(JCNewClass tree) { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
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diff
changeset
|
859 |
scan(tree.encl); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
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diff
changeset
|
860 |
scan(tree.args); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
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changeset
|
861 |
// scan(tree.def); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
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diff
changeset
|
862 |
for (List<Type> l = tree.constructorType.getThrownTypes(); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
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changeset
|
863 |
l.nonEmpty(); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
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changeset
|
864 |
l = l.tail) { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
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diff
changeset
|
865 |
markThrown(tree, l.head); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
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diff
changeset
|
866 |
} |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
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diff
changeset
|
867 |
List<Type> caughtPrev = caught; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
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diff
changeset
|
868 |
try { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
869 |
// If the new class expression defines an anonymous class, |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
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diff
changeset
|
870 |
// analysis of the anonymous constructor may encounter thrown |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
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diff
changeset
|
871 |
// types which are unsubstituted type variables. |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
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diff
changeset
|
872 |
// However, since the constructor's actual thrown types have |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
873 |
// already been marked as thrown, it is safe to simply include |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
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diff
changeset
|
874 |
// each of the constructor's formal thrown types in the set of |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
875 |
// 'caught/declared to be thrown' types, for the duration of |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
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diff
changeset
|
876 |
// the class def analysis. |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
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diff
changeset
|
877 |
if (tree.def != null) |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
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diff
changeset
|
878 |
for (List<Type> l = tree.constructor.type.getThrownTypes(); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
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diff
changeset
|
879 |
l.nonEmpty(); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
880 |
l = l.tail) { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
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diff
changeset
|
881 |
caught = chk.incl(l.head, caught); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
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diff
changeset
|
882 |
} |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
883 |
scan(tree.def); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
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diff
changeset
|
884 |
} |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
885 |
finally { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
886 |
caught = caughtPrev; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
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diff
changeset
|
887 |
} |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
888 |
} |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
889 |
|
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
890 |
public void visitTopLevel(JCCompilationUnit tree) { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
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diff
changeset
|
891 |
// Do nothing for TopLevel since each class is visited individually |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
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diff
changeset
|
892 |
} |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
893 |
|
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
894 |
/************************************************************************** |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
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diff
changeset
|
895 |
* main method |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
896 |
*************************************************************************/ |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
897 |
|
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
898 |
/** Perform definite assignment/unassignment analysis on a tree. |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
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diff
changeset
|
899 |
*/ |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
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diff
changeset
|
900 |
public void analyzeTree(Env<AttrContext> env, TreeMaker make) { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
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diff
changeset
|
901 |
try { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
902 |
attrEnv = env; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
903 |
JCTree tree = env.tree; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
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diff
changeset
|
904 |
Flow.this.make = make; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
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diff
changeset
|
905 |
pendingExits = new ListBuffer<FlowPendingExit>(); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
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diff
changeset
|
906 |
preciseRethrowTypes = new HashMap<Symbol, List<Type>>(); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
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diff
changeset
|
907 |
alive = true; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
908 |
this.thrown = this.caught = null; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
909 |
this.classDef = null; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
910 |
scan(tree); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
911 |
} finally { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
912 |
pendingExits = null; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
913 |
Flow.this.make = null; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
914 |
this.thrown = this.caught = null; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
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diff
changeset
|
915 |
this.classDef = null; |
6594
d43f068fba19
6970584: Flow.java should be more error-friendly
mcimadamore
parents:
6156
diff
changeset
|
916 |
} |
10 | 917 |
} |
918 |
} |
|
919 |
||
12333
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
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diff
changeset
|
920 |
/** |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
921 |
* This pass implements (i) definite assignment analysis, which ensures that |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
922 |
* each variable is assigned when used and (ii) definite unassignment analysis, |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
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diff
changeset
|
923 |
* which ensures that no final variable is assigned more than once. This visitor |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
924 |
* depends on the results of the liveliness analyzer. |
10 | 925 |
*/ |
12333
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
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diff
changeset
|
926 |
class AssignAnalyzer extends BaseAnalyzer<AssignAnalyzer.AssignPendingExit> { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
927 |
|
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
928 |
/** The set of definitely assigned variables. |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
929 |
*/ |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
930 |
Bits inits; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
931 |
|
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
932 |
/** The set of definitely unassigned variables. |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
933 |
*/ |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
934 |
Bits uninits; |
10 | 935 |
|
12333
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
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diff
changeset
|
936 |
/** The set of variables that are definitely unassigned everywhere |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
937 |
* in current try block. This variable is maintained lazily; it is |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
938 |
* updated only when something gets removed from uninits, |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
939 |
* typically by being assigned in reachable code. To obtain the |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
940 |
* correct set of variables which are definitely unassigned |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
941 |
* anywhere in current try block, intersect uninitsTry and |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
942 |
* uninits. |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
943 |
*/ |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
944 |
Bits uninitsTry; |
10 | 945 |
|
12333
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
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diff
changeset
|
946 |
/** When analyzing a condition, inits and uninits are null. |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
947 |
* Instead we have: |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
948 |
*/ |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
949 |
Bits initsWhenTrue; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
950 |
Bits initsWhenFalse; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
951 |
Bits uninitsWhenTrue; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
952 |
Bits uninitsWhenFalse; |
10 | 953 |
|
12333
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
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diff
changeset
|
954 |
/** A mapping from addresses to variable symbols. |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
955 |
*/ |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
956 |
VarSymbol[] vars; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
957 |
|
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
958 |
/** The current class being defined. |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
959 |
*/ |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
960 |
JCClassDecl classDef; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
961 |
|
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
962 |
/** The first variable sequence number in this class definition. |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
963 |
*/ |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
964 |
int firstadr; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
965 |
|
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
966 |
/** The next available variable sequence number. |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
967 |
*/ |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
968 |
int nextadr; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
969 |
|
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
970 |
/** The list of unreferenced automatic resources. |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
971 |
*/ |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
972 |
Scope unrefdResources; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
973 |
|
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
974 |
/** Set when processing a loop body the second time for DU analysis. */ |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
975 |
boolean loopPassTwo = false; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
976 |
|
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
977 |
class AssignPendingExit extends BaseAnalyzer.PendingExit { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
978 |
|
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
979 |
Bits exit_inits; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
980 |
Bits exit_uninits; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
981 |
|
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
982 |
AssignPendingExit(JCTree tree, Bits inits, Bits uninits) { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
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diff
changeset
|
983 |
super(tree); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
984 |
this.exit_inits = inits.dup(); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
985 |
this.exit_uninits = uninits.dup(); |
10 | 986 |
} |
987 |
||
12333
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
988 |
void resolveJump() { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
989 |
inits.andSet(exit_inits); |
7b02d0529a97
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|
990 |
uninits.andSet(exit_uninits); |
10 | 991 |
} |
992 |
} |
|
993 |
||
12333
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|
994 |
@Override |
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changeset
|
995 |
void markDead() { |
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|
996 |
inits.inclRange(firstadr, nextadr); |
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|
997 |
uninits.inclRange(firstadr, nextadr); |
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|
998 |
} |
7b02d0529a97
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changeset
|
999 |
|
7b02d0529a97
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changeset
|
1000 |
/*-------------- Processing variables ----------------------*/ |
10 | 1001 |
|
12333
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|
1002 |
/** Do we need to track init/uninit state of this symbol? |
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|
1003 |
* I.e. is symbol either a local or a blank final variable? |
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|
1004 |
*/ |
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changeset
|
1005 |
boolean trackable(VarSymbol sym) { |
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changeset
|
1006 |
return |
7b02d0529a97
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changeset
|
1007 |
(sym.owner.kind == MTH || |
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|
1008 |
((sym.flags() & (FINAL | HASINIT | PARAMETER)) == FINAL && |
7b02d0529a97
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changeset
|
1009 |
classDef.sym.isEnclosedBy((ClassSymbol)sym.owner))); |
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|
1010 |
} |
10 | 1011 |
|
12333
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|
1012 |
/** Initialize new trackable variable by setting its address field |
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|
1013 |
* to the next available sequence number and entering it under that |
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|
1014 |
* index into the vars array. |
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changeset
|
1015 |
*/ |
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changeset
|
1016 |
void newVar(VarSymbol sym) { |
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changeset
|
1017 |
if (nextadr == vars.length) { |
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|
1018 |
VarSymbol[] newvars = new VarSymbol[nextadr * 2]; |
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changeset
|
1019 |
System.arraycopy(vars, 0, newvars, 0, nextadr); |
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changeset
|
1020 |
vars = newvars; |
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changeset
|
1021 |
} |
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changeset
|
1022 |
sym.adr = nextadr; |
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changeset
|
1023 |
vars[nextadr] = sym; |
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changeset
|
1024 |
inits.excl(nextadr); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
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changeset
|
1025 |
uninits.incl(nextadr); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
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changeset
|
1026 |
nextadr++; |
10 | 1027 |
} |
1028 |
||
12333
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|
1029 |
/** Record an initialization of a trackable variable. |
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changeset
|
1030 |
*/ |
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changeset
|
1031 |
void letInit(DiagnosticPosition pos, VarSymbol sym) { |
7b02d0529a97
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changeset
|
1032 |
if (sym.adr >= firstadr && trackable(sym)) { |
7b02d0529a97
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changeset
|
1033 |
if ((sym.flags() & FINAL) != 0) { |
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changeset
|
1034 |
if ((sym.flags() & PARAMETER) != 0) { |
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changeset
|
1035 |
if ((sym.flags() & UNION) != 0) { //multi-catch parameter |
7b02d0529a97
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changeset
|
1036 |
log.error(pos, "multicatch.parameter.may.not.be.assigned", |
7b02d0529a97
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changeset
|
1037 |
sym); |
7b02d0529a97
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changeset
|
1038 |
} |
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changeset
|
1039 |
else { |
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changeset
|
1040 |
log.error(pos, "final.parameter.may.not.be.assigned", |
7b02d0529a97
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changeset
|
1041 |
sym); |
7b02d0529a97
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changeset
|
1042 |
} |
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changeset
|
1043 |
} else if (!uninits.isMember(sym.adr)) { |
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changeset
|
1044 |
log.error(pos, |
7b02d0529a97
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changeset
|
1045 |
loopPassTwo |
7b02d0529a97
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changeset
|
1046 |
? "var.might.be.assigned.in.loop" |
7b02d0529a97
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changeset
|
1047 |
: "var.might.already.be.assigned", |
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changeset
|
1048 |
sym); |
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changeset
|
1049 |
} else if (!inits.isMember(sym.adr)) { |
7b02d0529a97
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changeset
|
1050 |
// reachable assignment |
7b02d0529a97
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changeset
|
1051 |
uninits.excl(sym.adr); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
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changeset
|
1052 |
uninitsTry.excl(sym.adr); |
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changeset
|
1053 |
} else { |
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changeset
|
1054 |
//log.rawWarning(pos, "unreachable assignment");//DEBUG |
7b02d0529a97
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changeset
|
1055 |
uninits.excl(sym.adr); |
7b02d0529a97
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changeset
|
1056 |
} |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
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diff
changeset
|
1057 |
} |
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7151580: Separate DA/DU logic from exception checking logic in Flow.java
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changeset
|
1058 |
inits.incl(sym.adr); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
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changeset
|
1059 |
} else if ((sym.flags() & FINAL) != 0) { |
7b02d0529a97
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changeset
|
1060 |
log.error(pos, "var.might.already.be.assigned", sym); |
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changeset
|
1061 |
} |
10 | 1062 |
} |
1063 |
||
12333
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changeset
|
1064 |
/** If tree is either a simple name or of the form this.name or |
7b02d0529a97
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changeset
|
1065 |
* C.this.name, and tree represents a trackable variable, |
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changeset
|
1066 |
* record an initialization of the variable. |
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changeset
|
1067 |
*/ |
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7151580: Separate DA/DU logic from exception checking logic in Flow.java
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changeset
|
1068 |
void letInit(JCTree tree) { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
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changeset
|
1069 |
tree = TreeInfo.skipParens(tree); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
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changeset
|
1070 |
if (tree.hasTag(IDENT) || tree.hasTag(SELECT)) { |
7b02d0529a97
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changeset
|
1071 |
Symbol sym = TreeInfo.symbol(tree); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
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changeset
|
1072 |
if (sym.kind == VAR) { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
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changeset
|
1073 |
letInit(tree.pos(), (VarSymbol)sym); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
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changeset
|
1074 |
} |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
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diff
changeset
|
1075 |
} |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
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changeset
|
1076 |
} |
10 | 1077 |
|
12333
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changeset
|
1078 |
/** Check that trackable variable is initialized. |
7b02d0529a97
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changeset
|
1079 |
*/ |
7b02d0529a97
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changeset
|
1080 |
void checkInit(DiagnosticPosition pos, VarSymbol sym) { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
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changeset
|
1081 |
if ((sym.adr >= firstadr || sym.owner.kind != TYP) && |
7b02d0529a97
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changeset
|
1082 |
trackable(sym) && |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
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changeset
|
1083 |
!inits.isMember(sym.adr)) { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
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changeset
|
1084 |
log.error(pos, "var.might.not.have.been.initialized", |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
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changeset
|
1085 |
sym); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
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changeset
|
1086 |
inits.incl(sym.adr); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
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changeset
|
1087 |
} |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
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changeset
|
1088 |
} |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
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changeset
|
1089 |
|
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
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changeset
|
1090 |
/** Split (duplicate) inits/uninits into WhenTrue/WhenFalse sets |
7b02d0529a97
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changeset
|
1091 |
*/ |
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mcimadamore
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diff
changeset
|
1092 |
void split(boolean setToNull) { |
10 | 1093 |
initsWhenFalse = inits.dup(); |
1094 |
uninitsWhenFalse = uninits.dup(); |
|
1095 |
initsWhenTrue = inits; |
|
1096 |
uninitsWhenTrue = uninits; |
|
12333
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changeset
|
1097 |
if (setToNull) |
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changeset
|
1098 |
inits = uninits = null; |
10 | 1099 |
} |
1100 |
||
12333
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changeset
|
1101 |
/** Merge (intersect) inits/uninits from WhenTrue/WhenFalse sets. |
7b02d0529a97
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changeset
|
1102 |
*/ |
7b02d0529a97
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changeset
|
1103 |
void merge() { |
7b02d0529a97
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changeset
|
1104 |
inits = initsWhenFalse.andSet(initsWhenTrue); |
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changeset
|
1105 |
uninits = uninitsWhenFalse.andSet(uninitsWhenTrue); |
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changeset
|
1106 |
} |
10 | 1107 |
|
12333
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changeset
|
1108 |
/* ************************************************************************ |
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changeset
|
1109 |
* Visitor methods for statements and definitions |
7b02d0529a97
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changeset
|
1110 |
*************************************************************************/ |
10 | 1111 |
|
12333
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changeset
|
1112 |
/** Analyze an expression. Make sure to set (un)inits rather than |
7b02d0529a97
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changeset
|
1113 |
* (un)initsWhenTrue(WhenFalse) on exit. |
7b02d0529a97
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changeset
|
1114 |
*/ |
7b02d0529a97
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changeset
|
1115 |
void scanExpr(JCTree tree) { |
7b02d0529a97
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changeset
|
1116 |
if (tree != null) { |
7b02d0529a97
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changeset
|
1117 |
scan(tree); |
7b02d0529a97
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changeset
|
1118 |
if (inits == null) merge(); |
7b02d0529a97
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changeset
|
1119 |
} |
7b02d0529a97
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changeset
|
1120 |
} |
10 | 1121 |
|
12333
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|
1122 |
/** Analyze a list of expressions. |
7b02d0529a97
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changeset
|
1123 |
*/ |
7b02d0529a97
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changeset
|
1124 |
void scanExprs(List<? extends JCExpression> trees) { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
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changeset
|
1125 |
if (trees != null) |
7b02d0529a97
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changeset
|
1126 |
for (List<? extends JCExpression> l = trees; l.nonEmpty(); l = l.tail) |
7b02d0529a97
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changeset
|
1127 |
scanExpr(l.head); |
10 | 1128 |
} |
1129 |
||
12333
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changeset
|
1130 |
/** Analyze a condition. Make sure to set (un)initsWhenTrue(WhenFalse) |
7b02d0529a97
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changeset
|
1131 |
* rather than (un)inits on exit. |
7b02d0529a97
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changeset
|
1132 |
*/ |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
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changeset
|
1133 |
void scanCond(JCTree tree) { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
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changeset
|
1134 |
if (tree.type.isFalse()) { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
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changeset
|
1135 |
if (inits == null) merge(); |
7b02d0529a97
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changeset
|
1136 |
initsWhenTrue = inits.dup(); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
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changeset
|
1137 |
initsWhenTrue.inclRange(firstadr, nextadr); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
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changeset
|
1138 |
uninitsWhenTrue = uninits.dup(); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
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changeset
|
1139 |
uninitsWhenTrue.inclRange(firstadr, nextadr); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
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changeset
|
1140 |
initsWhenFalse = inits; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
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changeset
|
1141 |
uninitsWhenFalse = uninits; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
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changeset
|
1142 |
} else if (tree.type.isTrue()) { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
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changeset
|
1143 |
if (inits == null) merge(); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
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changeset
|
1144 |
initsWhenFalse = inits.dup(); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
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changeset
|
1145 |
initsWhenFalse.inclRange(firstadr, nextadr); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
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changeset
|
1146 |
uninitsWhenFalse = uninits.dup(); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
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changeset
|
1147 |
uninitsWhenFalse.inclRange(firstadr, nextadr); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
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diff
changeset
|
1148 |
initsWhenTrue = inits; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
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changeset
|
1149 |
uninitsWhenTrue = uninits; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
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changeset
|
1150 |
} else { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
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changeset
|
1151 |
scan(tree); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
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diff
changeset
|
1152 |
if (inits != null) |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
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diff
changeset
|
1153 |
split(tree.type != syms.unknownType); |
10 | 1154 |
} |
12333
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7151580: Separate DA/DU logic from exception checking logic in Flow.java
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changeset
|
1155 |
if (tree.type != syms.unknownType) |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
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diff
changeset
|
1156 |
inits = uninits = null; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
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diff
changeset
|
1157 |
} |
10 | 1158 |
|
12333
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7151580: Separate DA/DU logic from exception checking logic in Flow.java
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changeset
|
1159 |
/* ------------ Visitor methods for various sorts of trees -------------*/ |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
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diff
changeset
|
1160 |
|
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
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diff
changeset
|
1161 |
public void visitClassDef(JCClassDecl tree) { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
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diff
changeset
|
1162 |
if (tree.sym == null) return; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
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diff
changeset
|
1163 |
|
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
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diff
changeset
|
1164 |
JCClassDecl classDefPrev = classDef; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
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diff
changeset
|
1165 |
int firstadrPrev = firstadr; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
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diff
changeset
|
1166 |
int nextadrPrev = nextadr; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
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diff
changeset
|
1167 |
ListBuffer<AssignPendingExit> pendingExitsPrev = pendingExits; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
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diff
changeset
|
1168 |
Lint lintPrev = lint; |
10 | 1169 |
|
12333
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
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diff
changeset
|
1170 |
pendingExits = new ListBuffer<AssignPendingExit>(); |
10 | 1171 |
if (tree.name != names.empty) { |
12333
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
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diff
changeset
|
1172 |
firstadr = nextadr; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
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diff
changeset
|
1173 |
} |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
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diff
changeset
|
1174 |
classDef = tree; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
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diff
changeset
|
1175 |
lint = lint.augment(tree.sym.attributes_field); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
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diff
changeset
|
1176 |
|
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
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diff
changeset
|
1177 |
try { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
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diff
changeset
|
1178 |
// define all the static fields |
10 | 1179 |
for (List<JCTree> l = tree.defs; l.nonEmpty(); l = l.tail) { |
12333
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
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changeset
|
1180 |
if (l.head.hasTag(VARDEF)) { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
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diff
changeset
|
1181 |
JCVariableDecl def = (JCVariableDecl)l.head; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
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diff
changeset
|
1182 |
if ((def.mods.flags & STATIC) != 0) { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
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diff
changeset
|
1183 |
VarSymbol sym = def.sym; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
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diff
changeset
|
1184 |
if (trackable(sym)) |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
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diff
changeset
|
1185 |
newVar(sym); |
10 | 1186 |
} |
1187 |
} |
|
1188 |
} |
|
1189 |
||
12333
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
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changeset
|
1190 |
// process all the static initializers |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
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diff
changeset
|
1191 |
for (List<JCTree> l = tree.defs; l.nonEmpty(); l = l.tail) { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
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diff
changeset
|
1192 |
if (!l.head.hasTag(METHODDEF) && |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
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diff
changeset
|
1193 |
(TreeInfo.flags(l.head) & STATIC) != 0) { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
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diff
changeset
|
1194 |
scan(l.head); |
10 | 1195 |
} |
1196 |
} |
|
1197 |
||
12333
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
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diff
changeset
|
1198 |
// define all the instance fields |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
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diff
changeset
|
1199 |
for (List<JCTree> l = tree.defs; l.nonEmpty(); l = l.tail) { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
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diff
changeset
|
1200 |
if (l.head.hasTag(VARDEF)) { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
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diff
changeset
|
1201 |
JCVariableDecl def = (JCVariableDecl)l.head; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
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diff
changeset
|
1202 |
if ((def.mods.flags & STATIC) == 0) { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
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diff
changeset
|
1203 |
VarSymbol sym = def.sym; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
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diff
changeset
|
1204 |
if (trackable(sym)) |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1205 |
newVar(sym); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
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diff
changeset
|
1206 |
} |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1207 |
} |
10 | 1208 |
} |
1209 |
||
12333
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
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diff
changeset
|
1210 |
// process all the instance initializers |
10 | 1211 |
for (List<JCTree> l = tree.defs; l.nonEmpty(); l = l.tail) { |
12333
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
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diff
changeset
|
1212 |
if (!l.head.hasTag(METHODDEF) && |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
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diff
changeset
|
1213 |
(TreeInfo.flags(l.head) & STATIC) == 0) { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
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diff
changeset
|
1214 |
scan(l.head); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1215 |
} |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1216 |
} |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1217 |
|
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1218 |
// process all the methods |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1219 |
for (List<JCTree> l = tree.defs; l.nonEmpty(); l = l.tail) { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1220 |
if (l.head.hasTag(METHODDEF)) { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1221 |
scan(l.head); |
10 | 1222 |
} |
1223 |
} |
|
12333
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
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diff
changeset
|
1224 |
} finally { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1225 |
pendingExits = pendingExitsPrev; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1226 |
nextadr = nextadrPrev; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1227 |
firstadr = firstadrPrev; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1228 |
classDef = classDefPrev; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1229 |
lint = lintPrev; |
10 | 1230 |
} |
12333
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
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diff
changeset
|
1231 |
} |
10 | 1232 |
|
12333
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
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diff
changeset
|
1233 |
public void visitMethodDef(JCMethodDecl tree) { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1234 |
if (tree.body == null) return; |
10 | 1235 |
|
12333
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
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diff
changeset
|
1236 |
Bits initsPrev = inits.dup(); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1237 |
Bits uninitsPrev = uninits.dup(); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1238 |
int nextadrPrev = nextadr; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1239 |
int firstadrPrev = firstadr; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1240 |
Lint lintPrev = lint; |
10 | 1241 |
|
12333
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
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diff
changeset
|
1242 |
lint = lint.augment(tree.sym.attributes_field); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1243 |
|
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1244 |
Assert.check(pendingExits.isEmpty()); |
10 | 1245 |
|
12333
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1246 |
try { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1247 |
boolean isInitialConstructor = |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1248 |
TreeInfo.isInitialConstructor(tree); |
10 | 1249 |
|
12333
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
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10950
diff
changeset
|
1250 |
if (!isInitialConstructor) |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1251 |
firstadr = nextadr; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1252 |
for (List<JCVariableDecl> l = tree.params; l.nonEmpty(); l = l.tail) { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1253 |
JCVariableDecl def = l.head; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1254 |
scan(def); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1255 |
inits.incl(def.sym.adr); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1256 |
uninits.excl(def.sym.adr); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1257 |
} |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1258 |
// else we are in an instance initializer block; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1259 |
// leave caught unchanged. |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1260 |
scan(tree.body); |
10 | 1261 |
|
12333
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1262 |
if (isInitialConstructor) { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1263 |
for (int i = firstadr; i < nextadr; i++) |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1264 |
if (vars[i].owner == classDef.sym) |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1265 |
checkInit(TreeInfo.diagEndPos(tree.body), vars[i]); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1266 |
} |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1267 |
List<AssignPendingExit> exits = pendingExits.toList(); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1268 |
pendingExits = new ListBuffer<AssignPendingExit>(); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1269 |
while (exits.nonEmpty()) { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1270 |
AssignPendingExit exit = exits.head; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1271 |
exits = exits.tail; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1272 |
Assert.check(exit.tree.hasTag(RETURN), exit.tree); |
10 | 1273 |
if (isInitialConstructor) { |
12333
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1274 |
inits = exit.exit_inits; |
10 | 1275 |
for (int i = firstadr; i < nextadr; i++) |
1276 |
checkInit(exit.tree.pos(), vars[i]); |
|
1277 |
} |
|
1278 |
} |
|
1279 |
} finally { |
|
12333
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1280 |
inits = initsPrev; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1281 |
uninits = uninitsPrev; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1282 |
nextadr = nextadrPrev; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1283 |
firstadr = firstadrPrev; |
10 | 1284 |
lint = lintPrev; |
1285 |
} |
|
1286 |
} |
|
1287 |
||
12333
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1288 |
public void visitVarDef(JCVariableDecl tree) { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1289 |
boolean track = trackable(tree.sym); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1290 |
if (track && tree.sym.owner.kind == MTH) newVar(tree.sym); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1291 |
if (tree.init != null) { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1292 |
Lint lintPrev = lint; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1293 |
lint = lint.augment(tree.sym.attributes_field); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1294 |
try{ |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1295 |
scanExpr(tree.init); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1296 |
if (track) letInit(tree.pos(), tree.sym); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1297 |
} finally { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1298 |
lint = lintPrev; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1299 |
} |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1300 |
} |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1301 |
} |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1302 |
|
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1303 |
public void visitBlock(JCBlock tree) { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1304 |
int nextadrPrev = nextadr; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1305 |
scan(tree.stats); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1306 |
nextadr = nextadrPrev; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1307 |
} |
10 | 1308 |
|
12333
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1309 |
public void visitDoLoop(JCDoWhileLoop tree) { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1310 |
ListBuffer<AssignPendingExit> prevPendingExits = pendingExits; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1311 |
boolean prevLoopPassTwo = loopPassTwo; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1312 |
pendingExits = new ListBuffer<AssignPendingExit>(); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1313 |
int prevErrors = log.nerrors; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1314 |
do { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1315 |
Bits uninitsEntry = uninits.dup(); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1316 |
uninitsEntry.excludeFrom(nextadr); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1317 |
scan(tree.body); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1318 |
resolveContinues(tree); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1319 |
scanCond(tree.cond); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1320 |
if (log.nerrors != prevErrors || |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1321 |
loopPassTwo || |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1322 |
uninitsEntry.dup().diffSet(uninitsWhenTrue).nextBit(firstadr)==-1) |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1323 |
break; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1324 |
inits = initsWhenTrue; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1325 |
uninits = uninitsEntry.andSet(uninitsWhenTrue); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1326 |
loopPassTwo = true; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1327 |
} while (true); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1328 |
loopPassTwo = prevLoopPassTwo; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1329 |
inits = initsWhenFalse; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1330 |
uninits = uninitsWhenFalse; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1331 |
resolveBreaks(tree, prevPendingExits); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1332 |
} |
10 | 1333 |
|
12333
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1334 |
public void visitWhileLoop(JCWhileLoop tree) { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1335 |
ListBuffer<AssignPendingExit> prevPendingExits = pendingExits; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1336 |
boolean prevLoopPassTwo = loopPassTwo; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1337 |
Bits initsCond; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1338 |
Bits uninitsCond; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1339 |
pendingExits = new ListBuffer<AssignPendingExit>(); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1340 |
int prevErrors = log.nerrors; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1341 |
do { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1342 |
Bits uninitsEntry = uninits.dup(); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1343 |
uninitsEntry.excludeFrom(nextadr); |
10 | 1344 |
scanCond(tree.cond); |
1345 |
initsCond = initsWhenFalse; |
|
1346 |
uninitsCond = uninitsWhenFalse; |
|
1347 |
inits = initsWhenTrue; |
|
1348 |
uninits = uninitsWhenTrue; |
|
12333
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1349 |
scan(tree.body); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1350 |
resolveContinues(tree); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1351 |
if (log.nerrors != prevErrors || |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1352 |
loopPassTwo || |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1353 |
uninitsEntry.dup().diffSet(uninits).nextBit(firstadr) == -1) |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1354 |
break; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1355 |
uninits = uninitsEntry.andSet(uninits); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1356 |
loopPassTwo = true; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1357 |
} while (true); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1358 |
loopPassTwo = prevLoopPassTwo; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1359 |
inits = initsCond; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1360 |
uninits = uninitsCond; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1361 |
resolveBreaks(tree, prevPendingExits); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1362 |
} |
10 | 1363 |
|
12333
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1364 |
public void visitForLoop(JCForLoop tree) { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1365 |
ListBuffer<AssignPendingExit> prevPendingExits = pendingExits; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1366 |
boolean prevLoopPassTwo = loopPassTwo; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1367 |
int nextadrPrev = nextadr; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1368 |
scan(tree.init); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1369 |
Bits initsCond; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1370 |
Bits uninitsCond; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1371 |
pendingExits = new ListBuffer<AssignPendingExit>(); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1372 |
int prevErrors = log.nerrors; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1373 |
do { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1374 |
Bits uninitsEntry = uninits.dup(); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1375 |
uninitsEntry.excludeFrom(nextadr); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1376 |
if (tree.cond != null) { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1377 |
scanCond(tree.cond); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1378 |
initsCond = initsWhenFalse; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1379 |
uninitsCond = uninitsWhenFalse; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1380 |
inits = initsWhenTrue; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1381 |
uninits = uninitsWhenTrue; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1382 |
} else { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1383 |
initsCond = inits.dup(); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1384 |
initsCond.inclRange(firstadr, nextadr); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1385 |
uninitsCond = uninits.dup(); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1386 |
uninitsCond.inclRange(firstadr, nextadr); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1387 |
} |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1388 |
scan(tree.body); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1389 |
resolveContinues(tree); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1390 |
scan(tree.step); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1391 |
if (log.nerrors != prevErrors || |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1392 |
loopPassTwo || |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1393 |
uninitsEntry.dup().diffSet(uninits).nextBit(firstadr) == -1) |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1394 |
break; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1395 |
uninits = uninitsEntry.andSet(uninits); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1396 |
loopPassTwo = true; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1397 |
} while (true); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1398 |
loopPassTwo = prevLoopPassTwo; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1399 |
inits = initsCond; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1400 |
uninits = uninitsCond; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1401 |
resolveBreaks(tree, prevPendingExits); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1402 |
nextadr = nextadrPrev; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1403 |
} |
10 | 1404 |
|
12333
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1405 |
public void visitForeachLoop(JCEnhancedForLoop tree) { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1406 |
visitVarDef(tree.var); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1407 |
|
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1408 |
ListBuffer<AssignPendingExit> prevPendingExits = pendingExits; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1409 |
boolean prevLoopPassTwo = loopPassTwo; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1410 |
int nextadrPrev = nextadr; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1411 |
scan(tree.expr); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1412 |
Bits initsStart = inits.dup(); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1413 |
Bits uninitsStart = uninits.dup(); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1414 |
|
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1415 |
letInit(tree.pos(), tree.var.sym); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1416 |
pendingExits = new ListBuffer<AssignPendingExit>(); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1417 |
int prevErrors = log.nerrors; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1418 |
do { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1419 |
Bits uninitsEntry = uninits.dup(); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1420 |
uninitsEntry.excludeFrom(nextadr); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1421 |
scan(tree.body); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1422 |
resolveContinues(tree); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1423 |
if (log.nerrors != prevErrors || |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1424 |
loopPassTwo || |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1425 |
uninitsEntry.dup().diffSet(uninits).nextBit(firstadr) == -1) |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1426 |
break; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1427 |
uninits = uninitsEntry.andSet(uninits); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1428 |
loopPassTwo = true; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1429 |
} while (true); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1430 |
loopPassTwo = prevLoopPassTwo; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1431 |
inits = initsStart; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1432 |
uninits = uninitsStart.andSet(uninits); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1433 |
resolveBreaks(tree, prevPendingExits); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1434 |
nextadr = nextadrPrev; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1435 |
} |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1436 |
|
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1437 |
public void visitLabelled(JCLabeledStatement tree) { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1438 |
ListBuffer<AssignPendingExit> prevPendingExits = pendingExits; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1439 |
pendingExits = new ListBuffer<AssignPendingExit>(); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1440 |
scan(tree.body); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1441 |
resolveBreaks(tree, prevPendingExits); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1442 |
} |
10 | 1443 |
|
12333
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1444 |
public void visitSwitch(JCSwitch tree) { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1445 |
ListBuffer<AssignPendingExit> prevPendingExits = pendingExits; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1446 |
pendingExits = new ListBuffer<AssignPendingExit>(); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1447 |
int nextadrPrev = nextadr; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1448 |
scanExpr(tree.selector); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1449 |
Bits initsSwitch = inits; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1450 |
Bits uninitsSwitch = uninits.dup(); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1451 |
boolean hasDefault = false; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1452 |
for (List<JCCase> l = tree.cases; l.nonEmpty(); l = l.tail) { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1453 |
inits = initsSwitch.dup(); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1454 |
uninits = uninits.andSet(uninitsSwitch); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1455 |
JCCase c = l.head; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1456 |
if (c.pat == null) |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1457 |
hasDefault = true; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1458 |
else |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1459 |
scanExpr(c.pat); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1460 |
scan(c.stats); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1461 |
addVars(c.stats, initsSwitch, uninitsSwitch); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1462 |
// Warn about fall-through if lint switch fallthrough enabled. |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1463 |
} |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1464 |
if (!hasDefault) { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1465 |
inits.andSet(initsSwitch); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1466 |
} |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1467 |
resolveBreaks(tree, prevPendingExits); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1468 |
nextadr = nextadrPrev; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1469 |
} |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1470 |
// where |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1471 |
/** Add any variables defined in stats to inits and uninits. */ |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1472 |
private void addVars(List<JCStatement> stats, Bits inits, |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1473 |
Bits uninits) { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1474 |
for (;stats.nonEmpty(); stats = stats.tail) { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1475 |
JCTree stat = stats.head; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1476 |
if (stat.hasTag(VARDEF)) { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1477 |
int adr = ((JCVariableDecl) stat).sym.adr; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1478 |
inits.excl(adr); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1479 |
uninits.incl(adr); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1480 |
} |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1481 |
} |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1482 |
} |
10 | 1483 |
|
12333
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1484 |
public void visitTry(JCTry tree) { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1485 |
ListBuffer<JCVariableDecl> resourceVarDecls = ListBuffer.lb(); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1486 |
Bits uninitsTryPrev = uninitsTry; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1487 |
ListBuffer<AssignPendingExit> prevPendingExits = pendingExits; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1488 |
pendingExits = new ListBuffer<AssignPendingExit>(); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1489 |
Bits initsTry = inits.dup(); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1490 |
uninitsTry = uninits.dup(); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1491 |
for (JCTree resource : tree.resources) { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1492 |
if (resource instanceof JCVariableDecl) { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1493 |
JCVariableDecl vdecl = (JCVariableDecl) resource; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1494 |
visitVarDef(vdecl); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1495 |
unrefdResources.enter(vdecl.sym); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1496 |
resourceVarDecls.append(vdecl); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1497 |
} else if (resource instanceof JCExpression) { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1498 |
scanExpr((JCExpression) resource); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1499 |
} else { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1500 |
throw new AssertionError(tree); // parser error |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1501 |
} |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1502 |
} |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1503 |
scan(tree.body); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1504 |
uninitsTry.andSet(uninits); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1505 |
Bits initsEnd = inits; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1506 |
Bits uninitsEnd = uninits; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1507 |
int nextadrCatch = nextadr; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1508 |
|
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1509 |
if (!resourceVarDecls.isEmpty() && |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1510 |
lint.isEnabled(Lint.LintCategory.TRY)) { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1511 |
for (JCVariableDecl resVar : resourceVarDecls) { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1512 |
if (unrefdResources.includes(resVar.sym)) { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1513 |
log.warning(Lint.LintCategory.TRY, resVar.pos(), |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1514 |
"try.resource.not.referenced", resVar.sym); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1515 |
unrefdResources.remove(resVar.sym); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1516 |
} |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1517 |
} |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1518 |
} |
10 | 1519 |
|
12333
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1520 |
for (List<JCCatch> l = tree.catchers; l.nonEmpty(); l = l.tail) { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1521 |
JCVariableDecl param = l.head.param; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1522 |
inits = initsTry.dup(); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1523 |
uninits = uninitsTry.dup(); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1524 |
scan(param); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1525 |
inits.incl(param.sym.adr); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1526 |
uninits.excl(param.sym.adr); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1527 |
scan(l.head.body); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1528 |
initsEnd.andSet(inits); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1529 |
uninitsEnd.andSet(uninits); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1530 |
nextadr = nextadrCatch; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1531 |
} |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1532 |
if (tree.finalizer != null) { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1533 |
inits = initsTry.dup(); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1534 |
uninits = uninitsTry.dup(); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1535 |
ListBuffer<AssignPendingExit> exits = pendingExits; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1536 |
pendingExits = prevPendingExits; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1537 |
scan(tree.finalizer); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1538 |
if (!tree.finallyCanCompleteNormally) { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1539 |
// discard exits and exceptions from try and finally |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1540 |
} else { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1541 |
uninits.andSet(uninitsEnd); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1542 |
// FIX: this doesn't preserve source order of exits in catch |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1543 |
// versus finally! |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1544 |
while (exits.nonEmpty()) { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1545 |
AssignPendingExit exit = exits.next(); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1546 |
if (exit.exit_inits != null) { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1547 |
exit.exit_inits.orSet(inits); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1548 |
exit.exit_uninits.andSet(uninits); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1549 |
} |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1550 |
pendingExits.append(exit); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1551 |
} |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1552 |
inits.orSet(initsEnd); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1553 |
} |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1554 |
} else { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1555 |
inits = initsEnd; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1556 |
uninits = uninitsEnd; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1557 |
ListBuffer<AssignPendingExit> exits = pendingExits; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1558 |
pendingExits = prevPendingExits; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1559 |
while (exits.nonEmpty()) pendingExits.append(exits.next()); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1560 |
} |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1561 |
uninitsTry.andSet(uninitsTryPrev).andSet(uninits); |
10 | 1562 |
} |
12333
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1563 |
|
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1564 |
public void visitConditional(JCConditional tree) { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1565 |
scanCond(tree.cond); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1566 |
Bits initsBeforeElse = initsWhenFalse; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1567 |
Bits uninitsBeforeElse = uninitsWhenFalse; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1568 |
inits = initsWhenTrue; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1569 |
uninits = uninitsWhenTrue; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1570 |
if (tree.truepart.type.tag == BOOLEAN && |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1571 |
tree.falsepart.type.tag == BOOLEAN) { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1572 |
// if b and c are boolean valued, then |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1573 |
// v is (un)assigned after a?b:c when true iff |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1574 |
// v is (un)assigned after b when true and |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1575 |
// v is (un)assigned after c when true |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1576 |
scanCond(tree.truepart); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1577 |
Bits initsAfterThenWhenTrue = initsWhenTrue.dup(); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1578 |
Bits initsAfterThenWhenFalse = initsWhenFalse.dup(); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1579 |
Bits uninitsAfterThenWhenTrue = uninitsWhenTrue.dup(); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1580 |
Bits uninitsAfterThenWhenFalse = uninitsWhenFalse.dup(); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1581 |
inits = initsBeforeElse; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1582 |
uninits = uninitsBeforeElse; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1583 |
scanCond(tree.falsepart); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1584 |
initsWhenTrue.andSet(initsAfterThenWhenTrue); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1585 |
initsWhenFalse.andSet(initsAfterThenWhenFalse); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1586 |
uninitsWhenTrue.andSet(uninitsAfterThenWhenTrue); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1587 |
uninitsWhenFalse.andSet(uninitsAfterThenWhenFalse); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1588 |
} else { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1589 |
scanExpr(tree.truepart); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1590 |
Bits initsAfterThen = inits.dup(); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1591 |
Bits uninitsAfterThen = uninits.dup(); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1592 |
inits = initsBeforeElse; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1593 |
uninits = uninitsBeforeElse; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1594 |
scanExpr(tree.falsepart); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1595 |
inits.andSet(initsAfterThen); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1596 |
uninits.andSet(uninitsAfterThen); |
10 | 1597 |
} |
1598 |
} |
|
1599 |
||
12333
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1600 |
public void visitIf(JCIf tree) { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1601 |
scanCond(tree.cond); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1602 |
Bits initsBeforeElse = initsWhenFalse; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1603 |
Bits uninitsBeforeElse = uninitsWhenFalse; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1604 |
inits = initsWhenTrue; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1605 |
uninits = uninitsWhenTrue; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1606 |
scan(tree.thenpart); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1607 |
if (tree.elsepart != null) { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1608 |
Bits initsAfterThen = inits.dup(); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1609 |
Bits uninitsAfterThen = uninits.dup(); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1610 |
inits = initsBeforeElse; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1611 |
uninits = uninitsBeforeElse; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1612 |
scan(tree.elsepart); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1613 |
inits.andSet(initsAfterThen); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1614 |
uninits.andSet(uninitsAfterThen); |
6148
3a8158299c51
6911256: Project Coin: Support Automatic Resource Management (ARM) blocks in the compiler
darcy
parents:
5847
diff
changeset
|
1615 |
} else { |
12333
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1616 |
inits.andSet(initsBeforeElse); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1617 |
uninits.andSet(uninitsBeforeElse); |
6148
3a8158299c51
6911256: Project Coin: Support Automatic Resource Management (ARM) blocks in the compiler
darcy
parents:
5847
diff
changeset
|
1618 |
} |
3a8158299c51
6911256: Project Coin: Support Automatic Resource Management (ARM) blocks in the compiler
darcy
parents:
5847
diff
changeset
|
1619 |
} |
3a8158299c51
6911256: Project Coin: Support Automatic Resource Management (ARM) blocks in the compiler
darcy
parents:
5847
diff
changeset
|
1620 |
|
12333
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1621 |
public void visitBreak(JCBreak tree) { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1622 |
recordExit(tree, new AssignPendingExit(tree, inits, uninits)); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1623 |
} |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1624 |
|
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1625 |
public void visitContinue(JCContinue tree) { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1626 |
recordExit(tree, new AssignPendingExit(tree, inits, uninits)); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1627 |
} |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1628 |
|
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1629 |
public void visitReturn(JCReturn tree) { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1630 |
scanExpr(tree.expr); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1631 |
// if not initial constructor, should markDead instead of recordExit |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1632 |
recordExit(tree, new AssignPendingExit(tree, inits, uninits)); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1633 |
} |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1634 |
|
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1635 |
public void visitThrow(JCThrow tree) { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1636 |
scanExpr(tree.expr); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1637 |
markDead(); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1638 |
} |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1639 |
|
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1640 |
public void visitApply(JCMethodInvocation tree) { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1641 |
scanExpr(tree.meth); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1642 |
scanExprs(tree.args); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1643 |
} |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1644 |
|
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1645 |
public void visitNewClass(JCNewClass tree) { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1646 |
scanExpr(tree.encl); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1647 |
scanExprs(tree.args); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1648 |
scan(tree.def); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1649 |
} |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1650 |
|
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1651 |
public void visitNewArray(JCNewArray tree) { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1652 |
scanExprs(tree.dims); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1653 |
scanExprs(tree.elems); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1654 |
} |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1655 |
|
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1656 |
public void visitAssert(JCAssert tree) { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1657 |
Bits initsExit = inits.dup(); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1658 |
Bits uninitsExit = uninits.dup(); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1659 |
scanCond(tree.cond); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1660 |
uninitsExit.andSet(uninitsWhenTrue); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1661 |
if (tree.detail != null) { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1662 |
inits = initsWhenFalse; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1663 |
uninits = uninitsWhenFalse; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1664 |
scanExpr(tree.detail); |
10 | 1665 |
} |
12333
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1666 |
inits = initsExit; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1667 |
uninits = uninitsExit; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1668 |
} |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1669 |
|
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1670 |
public void visitAssign(JCAssign tree) { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1671 |
JCTree lhs = TreeInfo.skipParens(tree.lhs); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1672 |
if (!(lhs instanceof JCIdent)) scanExpr(lhs); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1673 |
scanExpr(tree.rhs); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1674 |
letInit(lhs); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1675 |
} |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1676 |
|
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1677 |
public void visitAssignop(JCAssignOp tree) { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1678 |
scanExpr(tree.lhs); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1679 |
scanExpr(tree.rhs); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1680 |
letInit(tree.lhs); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1681 |
} |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1682 |
|
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1683 |
public void visitUnary(JCUnary tree) { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1684 |
switch (tree.getTag()) { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1685 |
case NOT: |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1686 |
scanCond(tree.arg); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1687 |
Bits t = initsWhenFalse; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1688 |
initsWhenFalse = initsWhenTrue; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1689 |
initsWhenTrue = t; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1690 |
t = uninitsWhenFalse; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1691 |
uninitsWhenFalse = uninitsWhenTrue; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1692 |
uninitsWhenTrue = t; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1693 |
break; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1694 |
case PREINC: case POSTINC: |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1695 |
case PREDEC: case POSTDEC: |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1696 |
scanExpr(tree.arg); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1697 |
letInit(tree.arg); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1698 |
break; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1699 |
default: |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1700 |
scanExpr(tree.arg); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1701 |
} |
10 | 1702 |
} |
12333
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1703 |
|
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1704 |
public void visitBinary(JCBinary tree) { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1705 |
switch (tree.getTag()) { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1706 |
case AND: |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1707 |
scanCond(tree.lhs); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1708 |
Bits initsWhenFalseLeft = initsWhenFalse; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1709 |
Bits uninitsWhenFalseLeft = uninitsWhenFalse; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1710 |
inits = initsWhenTrue; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1711 |
uninits = uninitsWhenTrue; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1712 |
scanCond(tree.rhs); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1713 |
initsWhenFalse.andSet(initsWhenFalseLeft); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1714 |
uninitsWhenFalse.andSet(uninitsWhenFalseLeft); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1715 |
break; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1716 |
case OR: |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1717 |
scanCond(tree.lhs); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1718 |
Bits initsWhenTrueLeft = initsWhenTrue; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1719 |
Bits uninitsWhenTrueLeft = uninitsWhenTrue; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1720 |
inits = initsWhenFalse; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1721 |
uninits = uninitsWhenFalse; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1722 |
scanCond(tree.rhs); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1723 |
initsWhenTrue.andSet(initsWhenTrueLeft); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1724 |
uninitsWhenTrue.andSet(uninitsWhenTrueLeft); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1725 |
break; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1726 |
default: |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1727 |
scanExpr(tree.lhs); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1728 |
scanExpr(tree.rhs); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1729 |
} |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1730 |
} |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1731 |
|
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1732 |
public void visitIdent(JCIdent tree) { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1733 |
if (tree.sym.kind == VAR) { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1734 |
checkInit(tree.pos(), (VarSymbol)tree.sym); |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1735 |
referenced(tree.sym); |
10 | 1736 |
} |
12333
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1737 |
} |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1738 |
|
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
mcimadamore
parents:
10950
diff
changeset
|
1739 |
void referenced(Symbol sym) { |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
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1740 |
unrefdResources.remove(sym); |
10 | 1741 |
} |
12333
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1742 |
|
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7151580: Separate DA/DU logic from exception checking logic in Flow.java
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1743 |
public void visitTopLevel(JCCompilationUnit tree) { |
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7151580: Separate DA/DU logic from exception checking logic in Flow.java
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1744 |
// Do nothing for TopLevel since each class is visited individually |
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|
1745 |
} |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
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|
1746 |
|
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7151580: Separate DA/DU logic from exception checking logic in Flow.java
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|
1747 |
/************************************************************************** |
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7151580: Separate DA/DU logic from exception checking logic in Flow.java
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1748 |
* main method |
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7151580: Separate DA/DU logic from exception checking logic in Flow.java
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1749 |
*************************************************************************/ |
10 | 1750 |
|
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1751 |
/** Perform definite assignment/unassignment analysis on a tree. |
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7151580: Separate DA/DU logic from exception checking logic in Flow.java
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1752 |
*/ |
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7151580: Separate DA/DU logic from exception checking logic in Flow.java
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1753 |
public void analyzeTree(Env<AttrContext> env, TreeMaker make) { |
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7151580: Separate DA/DU logic from exception checking logic in Flow.java
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1754 |
try { |
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7151580: Separate DA/DU logic from exception checking logic in Flow.java
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1755 |
attrEnv = env; |
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7151580: Separate DA/DU logic from exception checking logic in Flow.java
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1756 |
JCTree tree = env.tree; |
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7151580: Separate DA/DU logic from exception checking logic in Flow.java
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1757 |
Flow.this.make = make; |
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7151580: Separate DA/DU logic from exception checking logic in Flow.java
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|
1758 |
inits = new Bits(); |
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7151580: Separate DA/DU logic from exception checking logic in Flow.java
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1759 |
uninits = new Bits(); |
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7151580: Separate DA/DU logic from exception checking logic in Flow.java
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1760 |
uninitsTry = new Bits(); |
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7151580: Separate DA/DU logic from exception checking logic in Flow.java
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1761 |
initsWhenTrue = initsWhenFalse = |
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7151580: Separate DA/DU logic from exception checking logic in Flow.java
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1762 |
uninitsWhenTrue = uninitsWhenFalse = null; |
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7151580: Separate DA/DU logic from exception checking logic in Flow.java
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1763 |
if (vars == null) |
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7151580: Separate DA/DU logic from exception checking logic in Flow.java
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1764 |
vars = new VarSymbol[32]; |
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7151580: Separate DA/DU logic from exception checking logic in Flow.java
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1765 |
else |
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7151580: Separate DA/DU logic from exception checking logic in Flow.java
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1766 |
for (int i=0; i<vars.length; i++) |
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7151580: Separate DA/DU logic from exception checking logic in Flow.java
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|
1767 |
vars[i] = null; |
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7151580: Separate DA/DU logic from exception checking logic in Flow.java
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|
1768 |
firstadr = 0; |
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7151580: Separate DA/DU logic from exception checking logic in Flow.java
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|
1769 |
nextadr = 0; |
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7151580: Separate DA/DU logic from exception checking logic in Flow.java
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1770 |
pendingExits = new ListBuffer<AssignPendingExit>(); |
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7151580: Separate DA/DU logic from exception checking logic in Flow.java
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1771 |
this.classDef = null; |
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7151580: Separate DA/DU logic from exception checking logic in Flow.java
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1772 |
unrefdResources = new Scope(env.enclClass.sym); |
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|
1773 |
scan(tree); |
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7151580: Separate DA/DU logic from exception checking logic in Flow.java
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|
1774 |
} finally { |
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7151580: Separate DA/DU logic from exception checking logic in Flow.java
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1775 |
// note that recursive invocations of this method fail hard |
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7151580: Separate DA/DU logic from exception checking logic in Flow.java
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|
1776 |
inits = uninits = uninitsTry = null; |
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7151580: Separate DA/DU logic from exception checking logic in Flow.java
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|
1777 |
initsWhenTrue = initsWhenFalse = |
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7151580: Separate DA/DU logic from exception checking logic in Flow.java
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|
1778 |
uninitsWhenTrue = uninitsWhenFalse = null; |
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7151580: Separate DA/DU logic from exception checking logic in Flow.java
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|
1779 |
if (vars != null) for (int i=0; i<vars.length; i++) |
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7151580: Separate DA/DU logic from exception checking logic in Flow.java
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|
1780 |
vars[i] = null; |
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7151580: Separate DA/DU logic from exception checking logic in Flow.java
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|
1781 |
firstadr = 0; |
7b02d0529a97
7151580: Separate DA/DU logic from exception checking logic in Flow.java
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|
1782 |
nextadr = 0; |
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7151580: Separate DA/DU logic from exception checking logic in Flow.java
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|
1783 |
pendingExits = null; |
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7151580: Separate DA/DU logic from exception checking logic in Flow.java
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|
1784 |
Flow.this.make = null; |
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|
1785 |
this.classDef = null; |
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7151580: Separate DA/DU logic from exception checking logic in Flow.java
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|
1786 |
unrefdResources = null; |
8849
4189ac38ddc9
6558548: The compiler needs to be aligned with clarified specification of throws
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1787 |
} |
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|
1788 |
} |
4189ac38ddc9
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1789 |
} |
10 | 1790 |
} |