/*
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* Copyright (C) 2017 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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package art;
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import java.lang.reflect.Field;
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import java.lang.reflect.Executable;
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public class StackTrace {
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public static class StackFrameData {
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public final Thread thr;
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public final Executable method;
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public final long current_location;
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public final int depth;
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public StackFrameData(Thread thr, Executable e, long loc, int depth) {
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this.thr = thr;
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this.method = e;
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this.current_location = loc;
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this.depth = depth;
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}
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@Override
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public String toString() {
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return String.format(
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"StackFrameData { thr: '%s', method: '%s', loc: %d, depth: %d }",
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this.thr,
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this.method,
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this.current_location,
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this.depth);
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}
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}
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public static native int GetStackDepth(Thread thr);
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private static native StackFrameData[] nativeGetStackTrace(Thread thr);
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public static StackFrameData[] GetStackTrace(Thread thr) {
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// The RI seems to give inconsistent (and sometimes nonsensical) results if the thread is not
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// suspended. The spec says that not being suspended is fine but since we want this to be
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// consistent we will suspend for the RI.
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boolean suspend_thread =
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!System.getProperty("java.vm.name").equals("Dalvik") &&
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!thr.equals(Thread.currentThread()) &&
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!Suspension.isSuspended(thr);
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if (suspend_thread) {
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Suspension.suspend(thr);
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}
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StackFrameData[] out = nativeGetStackTrace(thr);
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if (suspend_thread) {
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Suspension.resume(thr);
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}
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return out;
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}
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}
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