Add tests around deoptimization.
Test: 837-deopt
Bug: 233021156
Change-Id: I59982aee5c4c3e03ab1ba90448bfd0857aacd388
diff --git a/test/837-deopt/expected-stderr.txt b/test/837-deopt/expected-stderr.txt
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/test/837-deopt/expected-stderr.txt
diff --git a/test/837-deopt/expected-stdout.txt b/test/837-deopt/expected-stdout.txt
new file mode 100644
index 0000000..6a5618e
--- /dev/null
+++ b/test/837-deopt/expected-stdout.txt
@@ -0,0 +1 @@
+JNI_OnLoad called
diff --git a/test/837-deopt/info.txt b/test/837-deopt/info.txt
new file mode 100644
index 0000000..5c95277
--- /dev/null
+++ b/test/837-deopt/info.txt
@@ -0,0 +1 @@
+Tests around deoptimization.
diff --git a/test/837-deopt/src/Main.java b/test/837-deopt/src/Main.java
new file mode 100644
index 0000000..93efff9
--- /dev/null
+++ b/test/837-deopt/src/Main.java
@@ -0,0 +1,87 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+class Main {
+ int field = 42;
+
+ // Test that deoptimization preserves objects that are singletons.
+ public static int $noinline$foo(Main arg) {
+ Main m = new Main();
+ arg.returnValue();
+ return m.field;
+ }
+
+ // Test that doing OSR after deoptimization works.
+ public static int $noinline$foo2(Main arg, boolean osr) {
+ Main m = new Main();
+ arg.returnValue();
+ if (osr) {
+ for (int i = 0; i < Integer.MAX_VALUE; i++) {}
+ }
+ return m.field;
+ }
+
+ public static void main(String[] args) throws Throwable {
+ System.loadLibrary(args[0]);
+ test1();
+ test2();
+ }
+
+ public static void assertEquals(int expected, int actual) {
+ if (expected != actual) {
+ throw new Error("Expected " + expected + ", got " + actual);
+ }
+ }
+
+ public static void test1() {
+ ensureJitBaselineCompiled(Main.class, "$noinline$foo");
+ // Surround the call with GCs to increase chances we execute $noinline$foo
+ // while the GC isn't marking. This makes sure the inline cache is populated.
+ Runtime.getRuntime().gc();
+ assertEquals(42, $noinline$foo(new Main()));
+ Runtime.getRuntime().gc();
+
+ ensureJitCompiled(Main.class, "$noinline$foo");
+ assertEquals(42, $noinline$foo(new SubMain()));
+ }
+
+ public static void test2() {
+ ensureJitBaselineCompiled(Main.class, "$noinline$foo2");
+ // Surround the call with GCs to increase chances we execute $noinline$foo
+ // while the GC isn't marking. This makes sure the inline cache is populated.
+ Runtime.getRuntime().gc();
+ assertEquals(42, $noinline$foo2(new Main(), false));
+ Runtime.getRuntime().gc();
+
+ ensureJitCompiled(Main.class, "$noinline$foo2");
+ assertEquals(42, $noinline$foo2(new SubMain(), true));
+ }
+
+ public String returnValue() {
+ return "Main";
+ }
+
+ public static native void ensureJitCompiled(Class<?> cls, String methodName);
+ public static native void ensureJitBaselineCompiled(Class<?> cls, String methodName);
+}
+
+// Define a subclass with another implementation of returnValue to deoptimize $noinline$foo and
+// $noinline$foo2.
+class SubMain extends Main {
+ public String returnValue() {
+ return "SubMain";
+ }
+}
diff --git a/test/knownfailures.json b/test/knownfailures.json
index 013272f..e38ea86 100644
--- a/test/knownfailures.json
+++ b/test/knownfailures.json
@@ -1507,5 +1507,10 @@
"tests": ["2043-reference-pauses"],
"env_vars": {"ART_TEST_DEBUG_GC": "true"},
"description": ["Test timing out on debug gc."]
+ },
+ {
+ "tests": ["837-deopt"],
+ "description": ["Tests deoptimization and OSR, which never happens when tracing."],
+ "variant": "trace | stream | interpreter | interp-ac"
}
]