/*
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* Copyright (C) 2018 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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public class Main {
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// We run this test for AOT to verify that there is a HDeoptimize with dex pc 0.
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/// CHECK-START: int Main.$noinline$getInt(byte[], int) BCE (after)
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/// CHECK: Deoptimize dex_pc:0
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public static int $noinline$getInt(byte[] array, int offset) {
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// The aget for `array[offset]` is at dex pc 0, so the Deoptimize
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// from dynamic BCE shall also be at dex pc 0.
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return ((array[offset ] & 0xFF) << 0) +
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((array[offset + 1] & 0xFF) << 8) +
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((array[offset + 2] & 0xFF) << 16) +
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((array[offset + 3] & 0xFF) << 24);
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}
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public static void main(String[] args) {
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System.loadLibrary(args[0]);
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if (hasJit()) {
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byte[] array = { 0, 1, 2, 3 };
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ensureJitCompiled(Main.class, "$noinline$getInt");
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if (!hasJitCompiledEntrypoint(Main.class, "$noinline$getInt")) {
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throw new Error("Unexpected entrypoint!");
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}
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if ($noinline$getInt(array, 0) != 0x03020100) {
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throw new Error();
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}
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try {
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// The HDeoptimize at dex pc 0 was previously handled poorly as the dex pc 0
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// was used to detect whether we entered the method. This meant that the
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// instrumentation would have reported MethodEnteredEvent and we would have
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// told JIT that the method was entered. With JIT-on-first-use we would also
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// immediatelly recompile the method and run the compiled code leading to
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// a an infinite deoptimization recursion, yielding StackOverflowError.
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$noinline$getInt(array, 1);
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} catch (ArrayIndexOutOfBoundsException ignored) {}
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}
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System.out.println("passed");
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}
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public static native boolean hasJit();
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public native static boolean hasJitCompiledEntrypoint(Class<?> cls, String methodName);
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public native static void ensureJitCompiled(Class<?> cls, String methodName);
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}
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