8074551: GWT can be marked non-compilable due to deopt count pollution

Reviewed-by: kvn

1 files changed, 109 insertions, 0 deletions

diff --git a/test/compiler/jsr292/PollutedTrapCounts.java b/test/compiler/jsr292/PollutedTrapCounts.java
new file mode 100644
index 000000000..36d531117
--- /dev/null
+++ b/test/compiler/jsr292/PollutedTrapCounts.java
@@ -0,0 +1,109 @@
+/*
+ * Copyright (c) 2015, 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.
+ *
+ * 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 8074551
+ * @library /testlibrary
+ * @run main PollutedTrapCounts
+ */
+import java.lang.invoke.*;
+import com.oracle.java.testlibrary.*;
+
+public class PollutedTrapCounts {
+    public static void main(String[] args) throws Exception {
+        ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(
+                "-XX:+IgnoreUnrecognizedVMOptions",
+                "-XX:-TieredCompilation", "-Xbatch",
+                "-XX:PerBytecodeRecompilationCutoff=10", "-XX:PerMethodRecompilationCutoff=10",
+                "-XX:+PrintCompilation", "-XX:+UnlockDiagnosticVMOptions", "-XX:+PrintInlining",
+                    "PollutedTrapCounts$Test");
+
+        OutputAnalyzer analyzer = new OutputAnalyzer(pb.start());
+
+        analyzer.shouldHaveExitValue(0);
+
+        analyzer.shouldNotContain("not compilable (disabled)");
+    }
+
+    static class Test {
+        public static final MethodHandle test1;
+        public static final MethodHandle test2;
+        public static final MethodHandle empty;
+
+        static {
+            try {
+                Class<?> THIS_CLASS = Test.class;
+                MethodHandles.Lookup LOOKUP = MethodHandles.lookup();
+                test1 = LOOKUP.findStatic(THIS_CLASS, "test1", MethodType.methodType(boolean.class, boolean.class));
+                test2 = LOOKUP.findStatic(THIS_CLASS, "test2", MethodType.methodType(boolean.class, boolean.class));
+                empty = LOOKUP.findStatic(THIS_CLASS, "empty", MethodType.methodType(void.class, boolean.class));
+            } catch(Throwable e) {
+                throw new Error(e);
+            }
+        }
+
+        static boolean test1(boolean b) {
+            return b;
+        }
+        static boolean test2(boolean b) {
+            return true;
+        }
+        static void    empty(boolean b) {}
+
+        static void test(boolean freqValue, boolean removeInlineBlocker) throws Throwable {
+            MethodHandle innerGWT = MethodHandles.guardWithTest(test1, empty, empty);
+            MethodHandle outerGWT = MethodHandles.guardWithTest(test2, innerGWT, innerGWT);
+
+            // Trigger compilation
+            for (int i = 0; i < 20_000; i++) {
+                outerGWT.invokeExact(freqValue);
+            }
+
+            // Trigger deopt & nmethod invalidation
+            outerGWT.invokeExact(!freqValue);
+
+            // Force inline blocker removal on rare-taken path
+            if (removeInlineBlocker) {
+                for (int i = 0; i < 100; i++) {
+                    outerGWT.invokeExact(!freqValue);
+                }
+            }
+
+            // Trigger recompilation
+            for (int i = 0; i < 20_000; i++) {
+                outerGWT.invokeExact(freqValue);
+            }
+        }
+
+        public static void main(String[] args) throws Throwable {
+            boolean freqValue = true;
+            boolean removeInlineBlocker = false;
+            for (int i = 0; i < 20; i++) {
+                test(freqValue, removeInlineBlocker);
+                freqValue = !freqValue;
+                removeInlineBlocker = !removeInlineBlocker;
+            }
+        }
+    }
+}