8177933: Stackoverflow during compilation, starting jdk-9+163
Summary: Avoid extra method call in Attr.attribTree
Reviewed-by: vromero
--- a/langtools/src/jdk.compiler/share/classes/com/sun/tools/javac/comp/ArgumentAttr.java Thu Apr 06 16:19:33 2017 +0200
+++ b/langtools/src/jdk.compiler/share/classes/com/sun/tools/javac/comp/ArgumentAttr.java Thu Apr 06 17:27:52 2017 +0100
@@ -105,7 +105,7 @@
private Env<AttrContext> env;
/** Result of method attribution. */
- private Type result;
+ Type result;
/** Cache for argument types; behavior is influences by the currrently selected cache policy. */
Map<UniquePos, ArgumentType<?>> argumentTypeCache = new LinkedHashMap<>();
@@ -215,13 +215,8 @@
processArg(that, () -> {
T speculativeTree = (T)deferredAttr.attribSpeculative(that, env, attr.new MethodAttrInfo() {
@Override
- protected void attr(JCTree tree, Env<AttrContext> env) {
- //avoid speculative attribution loops
- if (!new UniquePos(tree).equals(pos)) {
- super.attr(tree, env);
- } else {
- visitTree(tree);
- }
+ protected boolean needsArgumentAttr(JCTree tree) {
+ return !new UniquePos(tree).equals(pos);
}
});
return argumentTypeFactory.apply(speculativeTree);
--- a/langtools/src/jdk.compiler/share/classes/com/sun/tools/javac/comp/Attr.java Thu Apr 06 16:19:33 2017 +0200
+++ b/langtools/src/jdk.compiler/share/classes/com/sun/tools/javac/comp/Attr.java Thu Apr 06 17:27:52 2017 +0100
@@ -505,9 +505,12 @@
this.checkMode = checkMode;
}
- protected void attr(JCTree tree, Env<AttrContext> env) {
- tree.accept(Attr.this);
- }
+ /**
+ * Should {@link Attr#attribTree} use the {@ArgumentAttr} visitor instead of this one?
+ * @param tree The tree to be type-checked.
+ * @return true if {@ArgumentAttr} should be used.
+ */
+ protected boolean needsArgumentAttr(JCTree tree) { return false; }
protected Type check(final DiagnosticPosition pos, final Type found) {
return chk.checkType(pos, found, pt, checkContext);
@@ -553,8 +556,8 @@
}
@Override
- protected void attr(JCTree tree, Env<AttrContext> env) {
- result = argumentAttr.attribArg(tree, env);
+ protected boolean needsArgumentAttr(JCTree tree) {
+ return true;
}
protected ResultInfo dup(Type newPt) {
@@ -644,7 +647,11 @@
try {
this.env = env;
this.resultInfo = resultInfo;
- resultInfo.attr(tree, env);
+ if (resultInfo.needsArgumentAttr(tree)) {
+ result = argumentAttr.attribArg(tree, env);
+ } else {
+ tree.accept(this);
+ }
if (tree == breakTree &&
resultInfo.checkContext.deferredAttrContext().mode == AttrMode.CHECK) {
throw new BreakAttr(copyEnv(env));
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/langtools/test/tools/javac/lambda/speculative/T8177933.java Thu Apr 06 17:27:52 2017 +0100
@@ -0,0 +1,89 @@
+/*
+ * Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation. Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * @test
+ * @bug 8177933
+ * @summary Stackoverflow during compilation, starting jdk-9+163
+ *
+ * @library /tools/javac/lib
+ * @modules jdk.compiler/com.sun.tools.javac.api
+ * jdk.compiler/com.sun.tools.javac.code
+ * jdk.compiler/com.sun.tools.javac.comp
+ * jdk.compiler/com.sun.tools.javac.main
+ * jdk.compiler/com.sun.tools.javac.tree
+ * jdk.compiler/com.sun.tools.javac.util
+ * @build combo.ComboTestHelper
+
+ * @run main/othervm -Xss512K T8177933
+ */
+
+import combo.ComboInstance;
+import combo.ComboParameter;
+import combo.ComboTask.Result;
+import combo.ComboTestHelper;
+
+import javax.lang.model.element.Element;
+
+public class T8177933 extends ComboInstance<T8177933> {
+
+ static final int MAX_DEPTH = 350;
+
+ static class CallExpr implements ComboParameter {
+ @Override
+ public String expand(String optParameter) {
+ Integer n = Integer.parseInt(optParameter);
+ if (n == MAX_DEPTH) {
+ return "m()";
+ } else {
+ return "m().#{CALL." + (n + 1) + "}";
+ }
+ }
+ }
+
+ static final String sourceTemplate =
+ "class Test {\n" +
+ " Test m() { return null; }\n" +
+ " void test() {\n" +
+ " #{CALL.0};\n" +
+ "} }\n";
+
+ public static void main(String[] args) {
+ new ComboTestHelper<T8177933>()
+ .withDimension("CALL", new CallExpr())
+ .run(T8177933::new);
+ }
+
+ @Override
+ protected void doWork() throws Throwable {
+ Result<Iterable<? extends Element>> result = newCompilationTask()
+ .withOption("-XDdev")
+ .withSourceFromTemplate(sourceTemplate)
+ .analyze();
+ if (!result.get().iterator().hasNext()) {
+ fail("Exception occurred when compiling combo. " + result.compilationInfo());
+ }
+ }
+}