package org.graalvm.compiler.core.test.tutorial;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.util.Arrays;
import java.util.Collection;
import jdk.vm.ci.meta.MetaAccessProvider;
import jdk.vm.ci.meta.ResolvedJavaField;
import jdk.vm.ci.meta.ResolvedJavaMethod;
import jdk.vm.ci.meta.ResolvedJavaType;
import org.junit.Assert;
import org.junit.Test;
import org.graalvm.compiler.api.test.Graal;
import org.graalvm.compiler.core.target.Backend;
import org.graalvm.compiler.core.test.tutorial.StaticAnalysis.MethodState;
import org.graalvm.compiler.core.test.tutorial.StaticAnalysis.TypeFlow;
import org.graalvm.compiler.nodes.spi.StampProvider;
import org.graalvm.compiler.phases.util.Providers;
import org.graalvm.compiler.runtime.RuntimeProvider;
public class StaticAnalysisTests {
static class A {
Object foo(Object arg) {
return arg;
}
}
static class B extends A {
@Override
Object foo(Object arg) {
if (arg instanceof Data) {
return ((Data) arg).f;
} else {
return super.foo(arg);
}
}
}
static class Data {
Object f;
}
private final MetaAccessProvider metaAccess;
private final StampProvider stampProvider;
public StaticAnalysisTests() {
Backend backend = Graal.getRequiredCapability(RuntimeProvider.class).getHostBackend();
Providers providers = backend.getProviders();
this.metaAccess = providers.getMetaAccess();
this.stampProvider = providers.getStampProvider();
}
static void test01Entry() {
A a = new A();
a.foo(null);
}
@Test
public void test01() {
StaticAnalysis sa = new StaticAnalysis(metaAccess, stampProvider);
sa.addMethod(findMethod(StaticAnalysisTests.class, "test01Entry"));
sa.finish();
assertEquals(sa.getResults().getAllInstantiatedTypes(), t(A.class));
assertEquals(f(sa, Data.class, "f"));
assertEquals(m(sa, A.class, "foo").getFormalParameters()[0], t(A.class));
assertEquals(m(sa, A.class, "foo").getFormalParameters()[1]);
assertEquals(m(sa, A.class, "foo").getFormalReturn());
}
static void test02Entry() {
A a = new A();
a.foo(new Data());
B b = new B();
b.foo(null);
}
@Test
public void test02() {
StaticAnalysis sa = new StaticAnalysis(metaAccess, stampProvider);
sa.addMethod(findMethod(StaticAnalysisTests.class, "test02Entry"));
sa.finish();
assertEquals(sa.getResults().getAllInstantiatedTypes(), t(A.class), t(B.class), t(Data.class));
assertEquals(f(sa, Data.class, "f"));
assertEquals(m(sa, A.class, "foo").getFormalParameters()[0], t(A.class), t(B.class));
assertEquals(m(sa, A.class, "foo").getFormalParameters()[1], t(Data.class));
assertEquals(m(sa, A.class, "foo").getFormalReturn(), t(Data.class));
assertEquals(m(sa, B.class, "foo").getFormalParameters()[0], t(B.class));
assertEquals(m(sa, B.class, "foo").getFormalParameters()[1]);
assertEquals(m(sa, B.class, "foo").getFormalReturn(), t(Data.class));
}
static void test03Entry() {
Data data = new Data();
data.f = new Integer(42);
A a = new A();
a.foo(new Data());
B b = new B();
b.foo(null);
}
@Test
public void test03() {
StaticAnalysis sa = new StaticAnalysis(metaAccess, stampProvider);
sa.addMethod(findMethod(StaticAnalysisTests.class, "test03Entry"));
sa.finish();
assertEquals(sa.getResults().getAllInstantiatedTypes(), t(A.class), t(B.class), t(Data.class), t(Integer.class));
assertEquals(f(sa, Data.class, "f"), t(Integer.class));
assertEquals(m(sa, A.class, "foo").getFormalParameters()[0], t(A.class), t(B.class));
assertEquals(m(sa, A.class, "foo").getFormalParameters()[1], t(Data.class));
assertEquals(m(sa, A.class, "foo").getFormalReturn(), t(Data.class));
assertEquals(m(sa, B.class, "foo").getFormalParameters()[0], t(B.class));
assertEquals(m(sa, B.class, "foo").getFormalParameters()[1]);
assertEquals(m(sa, B.class, "foo").getFormalReturn(), t(Data.class), t(Integer.class));
}
static void test04Entry() {
Data data = null;
for (int i = 0; i < 2; i++) {
if (i == 0) {
data = new Data();
} else if (i == 1) {
data.f = new Integer(42);
}
}
A a = new A();
a.foo(data);
}
@Test
public void test04() {
StaticAnalysis sa = new StaticAnalysis(metaAccess, stampProvider);
sa.addMethod(findMethod(StaticAnalysisTests.class, "test04Entry"));
sa.finish();
assertEquals(sa.getResults().getAllInstantiatedTypes(), t(A.class), t(Data.class), t(Integer.class));
assertEquals(f(sa, Data.class, "f"), t(Integer.class));
assertEquals(m(sa, A.class, "foo").getFormalParameters()[0], t(A.class));
assertEquals(m(sa, A.class, "foo").getFormalParameters()[1], t(Data.class));
assertEquals(m(sa, A.class, "foo").getFormalReturn(), t(Data.class));
}
private MethodState m(StaticAnalysis sa, Class<?> declaringClass, String name) {
return sa.getResults().lookupMethod(findMethod(declaringClass, name));
}
private TypeFlow f(StaticAnalysis sa, Class<?> declaringClass, String name) {
return sa.getResults().lookupField(findField(declaringClass, name));
}
private static void assertEquals(TypeFlow actual, Object... expected) {
Collection<?> actualTypes = actual.getTypes();
if (actualTypes.size() != expected.length || !actualTypes.containsAll(Arrays.asList(expected))) {
Assert.fail(actualTypes + " != " + Arrays.asList(expected));
}
}
private ResolvedJavaType t(Class<?> clazz) {
return metaAccess.lookupJavaType(clazz);
}
private ResolvedJavaMethod findMethod(Class<?> declaringClass, String name) {
Method reflectionMethod = null;
for (Method m : declaringClass.getDeclaredMethods()) {
if (m.getName().equals(name)) {
assert reflectionMethod == null : "More than one method with name " + name + " in class " + declaringClass.getName();
reflectionMethod = m;
}
}
assert reflectionMethod != null : "No method with name " + name + " in class " + declaringClass.getName();
return metaAccess.lookupJavaMethod(reflectionMethod);
}
private ResolvedJavaField findField(Class<?> declaringClass, String name) {
Field reflectionField;
try {
reflectionField = declaringClass.getDeclaredField(name);
} catch (NoSuchFieldException | SecurityException ex) {
throw new AssertionError(ex);
}
return metaAccess.lookupJavaField(reflectionField);
}
}