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package com.oracle.svm.core.deopt;
import org.graalvm.compiler.api.replacements.Fold;
import org.graalvm.nativeimage.ImageSingletons;
import org.graalvm.nativeimage.Platform;
import org.graalvm.nativeimage.Platforms;
import org.graalvm.nativeimage.c.function.CFunctionPointer;
import com.oracle.svm.core.annotate.Uninterruptible;
import com.oracle.svm.core.annotate.UnknownPrimitiveField;
public class DeoptimizationSupport {
@UnknownPrimitiveField private CFunctionPointer deoptStubPointer;
@Platforms(Platform.HOSTED_ONLY.class)
public DeoptimizationSupport() {
}
Returns true if the image build was configured with support for deoptimization. In most
cases, that happens when support for runtime compilation using Graal is used. However, we
also have a few low-level unit tests that test deoptimization in isolation, without Graal
compilation.
/**
* Returns true if the image build was configured with support for deoptimization. In most
* cases, that happens when support for runtime compilation using Graal is used. However, we
* also have a few low-level unit tests that test deoptimization in isolation, without Graal
* compilation.
*/
@Fold
public static boolean enabled() {
return ImageSingletons.contains(DeoptimizationSupport.class);
}
@Fold
static DeoptimizationSupport get() {
return ImageSingletons.lookup(DeoptimizationSupport.class);
}
Initializes the pointer to the code of Deoptimizer.deoptStub
. /**
* Initializes the pointer to the code of {@link Deoptimizer#deoptStub}.
*/
@Platforms(Platform.HOSTED_ONLY.class)
public static void setDeoptStubPointer(CFunctionPointer deoptStub) {
assert get().deoptStubPointer == null : "multiple deopt stub methods registered";
get().deoptStubPointer = deoptStub;
}
Returns a pointer to the code of Deoptimizer.deoptStub
. /**
* Returns a pointer to the code of {@link Deoptimizer#deoptStub}.
*/
@Uninterruptible(reason = "Called from uninterruptible code.", mayBeInlined = true)
public static CFunctionPointer getDeoptStubPointer() {
return get().deoptStubPointer;
}
}