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