CHA for interface method.
Test: m test-art-host, boot device.
Change-Id: Ia2da74c2af1974fe344f215ae667eaf03c59a26e
diff --git a/runtime/art_method.h b/runtime/art_method.h
index 99d7a49..bd03a49 100644
--- a/runtime/art_method.h
+++ b/runtime/art_method.h
@@ -689,7 +689,7 @@
// Pointer to JNI function registered to this method, or a function to resolve the JNI function,
// or the profiling data for non-native methods, or an ImtConflictTable, or the
- // single-implementation of an abstract method.
+ // single-implementation of an abstract/interface method.
void* data_;
// Method dispatch from quick compiled code invokes this pointer which may cause bridging into
diff --git a/runtime/cha.cc b/runtime/cha.cc
index eaba01b..7948c29 100644
--- a/runtime/cha.cc
+++ b/runtime/cha.cc
@@ -210,7 +210,7 @@
}
}
-void ClassHierarchyAnalysis::CheckSingleImplementationInfo(
+void ClassHierarchyAnalysis::CheckVirtualMethodSingleImplementationInfo(
Handle<mirror::Class> klass,
ArtMethod* virtual_method,
ArtMethod* method_in_super,
@@ -290,8 +290,9 @@
// A non-abstract method overrides an abstract method.
if (method_in_super->GetSingleImplementation(pointer_size) == nullptr) {
// Abstract method_in_super has no implementation yet.
- // We need to grab cha_lock_ for further checking/updating due to possible
- // races.
+ // We need to grab cha_lock_ since there may be multiple class linking
+ // going on that can check/modify the single-implementation flag/method
+ // of method_in_super.
MutexLock cha_mu(Thread::Current(), *Locks::cha_lock_);
if (!method_in_super->HasSingleImplementation()) {
return;
@@ -362,6 +363,55 @@
}
}
+void ClassHierarchyAnalysis::CheckInterfaceMethodSingleImplementationInfo(
+ Handle<mirror::Class> klass,
+ ArtMethod* interface_method,
+ ArtMethod* implementation_method,
+ std::unordered_set<ArtMethod*>& invalidated_single_impl_methods,
+ PointerSize pointer_size) {
+ DCHECK(klass->IsInstantiable());
+ DCHECK(interface_method->IsAbstract() || interface_method->IsDefault());
+
+ if (!interface_method->HasSingleImplementation()) {
+ return;
+ }
+
+ if (implementation_method->IsAbstract()) {
+ // An instantiable class doesn't supply an implementation for
+ // interface_method. Invoking the interface method on the class will throw
+ // AbstractMethodError. This is an uncommon case, so we simply treat
+ // interface_method as not having single-implementation.
+ invalidated_single_impl_methods.insert(interface_method);
+ return;
+ }
+
+ // We need to grab cha_lock_ since there may be multiple class linking going
+ // on that can check/modify the single-implementation flag/method of
+ // interface_method.
+ MutexLock cha_mu(Thread::Current(), *Locks::cha_lock_);
+ // Do this check again after we grab cha_lock_.
+ if (!interface_method->HasSingleImplementation()) {
+ return;
+ }
+
+ ArtMethod* single_impl = interface_method->GetSingleImplementation(pointer_size);
+ if (single_impl == nullptr) {
+ // implementation_method becomes the first implementation for
+ // interface_method.
+ interface_method->SetSingleImplementation(implementation_method, pointer_size);
+ // Keep interface_method's single-implementation status.
+ return;
+ }
+ DCHECK(!single_impl->IsAbstract());
+ if (single_impl->GetDeclaringClass() == implementation_method->GetDeclaringClass()) {
+ // Same implementation. Since implementation_method may be a copy of a default
+ // method, we need to check the declaring class for equality.
+ return;
+ }
+ // Another implementation for interface_method.
+ invalidated_single_impl_methods.insert(interface_method);
+}
+
void ClassHierarchyAnalysis::InitSingleImplementationFlag(Handle<mirror::Class> klass,
ArtMethod* method,
PointerSize pointer_size) {
@@ -382,6 +432,7 @@
// Rare case, but we do accept it (such as 800-smali/smali/b_26143249.smali).
// Do not attempt to devirtualize it.
method->SetHasSingleImplementation(false);
+ DCHECK(method->GetSingleImplementation(pointer_size) == nullptr);
} else {
// Abstract method starts with single-implementation flag set and null
// implementation method.
@@ -396,9 +447,15 @@
}
void ClassHierarchyAnalysis::UpdateAfterLoadingOf(Handle<mirror::Class> klass) {
+ PointerSize image_pointer_size = Runtime::Current()->GetClassLinker()->GetImagePointerSize();
if (klass->IsInterface()) {
+ for (ArtMethod& method : klass->GetDeclaredVirtualMethods(image_pointer_size)) {
+ DCHECK(method.IsAbstract() || method.IsDefault());
+ InitSingleImplementationFlag(klass, &method, image_pointer_size);
+ }
return;
}
+
mirror::Class* super_class = klass->GetSuperClass();
if (super_class == nullptr) {
return;
@@ -408,7 +465,6 @@
// is invalidated by linking `klass`.
std::unordered_set<ArtMethod*> invalidated_single_impl_methods;
- PointerSize image_pointer_size = Runtime::Current()->GetClassLinker()->GetImagePointerSize();
// Do an entry-by-entry comparison of vtable contents with super's vtable.
for (int32_t i = 0; i < super_class->GetVTableLength(); ++i) {
ArtMethod* method = klass->GetVTableEntry(i, image_pointer_size);
@@ -418,33 +474,59 @@
if (method->IsAbstract() && klass->IsInstantiable()) {
// An instantiable class that inherits an abstract method is treated as
// supplying an implementation that throws AbstractMethodError.
- CheckSingleImplementationInfo(klass,
- method,
- method_in_super,
- invalidated_single_impl_methods,
- image_pointer_size);
+ CheckVirtualMethodSingleImplementationInfo(klass,
+ method,
+ method_in_super,
+ invalidated_single_impl_methods,
+ image_pointer_size);
}
continue;
}
InitSingleImplementationFlag(klass, method, image_pointer_size);
- CheckSingleImplementationInfo(klass,
- method,
- method_in_super,
- invalidated_single_impl_methods,
- image_pointer_size);
+ CheckVirtualMethodSingleImplementationInfo(klass,
+ method,
+ method_in_super,
+ invalidated_single_impl_methods,
+ image_pointer_size);
}
-
// For new virtual methods that don't override.
for (int32_t i = super_class->GetVTableLength(); i < klass->GetVTableLength(); ++i) {
ArtMethod* method = klass->GetVTableEntry(i, image_pointer_size);
InitSingleImplementationFlag(klass, method, image_pointer_size);
}
- Runtime* const runtime = Runtime::Current();
+ if (klass->IsInstantiable()) {
+ auto* iftable = klass->GetIfTable();
+ const size_t ifcount = klass->GetIfTableCount();
+ for (size_t i = 0; i < ifcount; ++i) {
+ mirror::Class* interface = iftable->GetInterface(i);
+ for (size_t j = 0, count = iftable->GetMethodArrayCount(i); j < count; ++j) {
+ ArtMethod* interface_method = interface->GetVirtualMethod(j, image_pointer_size);
+ mirror::PointerArray* method_array = iftable->GetMethodArray(i);
+ ArtMethod* implementation_method =
+ method_array->GetElementPtrSize<ArtMethod*>(j, image_pointer_size);
+ DCHECK(implementation_method != nullptr) << klass->PrettyClass();
+ CheckInterfaceMethodSingleImplementationInfo(klass,
+ interface_method,
+ implementation_method,
+ invalidated_single_impl_methods,
+ image_pointer_size);
+ }
+ }
+ }
+
+ InvalidateSingleImplementationMethods(invalidated_single_impl_methods);
+}
+
+void ClassHierarchyAnalysis::InvalidateSingleImplementationMethods(
+ std::unordered_set<ArtMethod*>& invalidated_single_impl_methods) {
if (!invalidated_single_impl_methods.empty()) {
+ Runtime* const runtime = Runtime::Current();
Thread *self = Thread::Current();
// Method headers for compiled code to be invalidated.
std::unordered_set<OatQuickMethodHeader*> dependent_method_headers;
+ PointerSize image_pointer_size =
+ Runtime::Current()->GetClassLinker()->GetImagePointerSize();
{
// We do this under cha_lock_. Committing code also grabs this lock to
diff --git a/runtime/cha.h b/runtime/cha.h
index a56a752..99c49d2 100644
--- a/runtime/cha.h
+++ b/runtime/cha.h
@@ -117,11 +117,13 @@
PointerSize pointer_size)
REQUIRES_SHARED(Locks::mutator_lock_);
+ // Check/update single-implementation info when one virtual method
+ // overrides another.
// `virtual_method` in `klass` overrides `method_in_super`.
- // This will invalidate some assumptions on single-implementation.
+ // This may invalidate some assumptions on single-implementation.
// Append methods that should have their single-implementation flag invalidated
// to `invalidated_single_impl_methods`.
- void CheckSingleImplementationInfo(
+ void CheckVirtualMethodSingleImplementationInfo(
Handle<mirror::Class> klass,
ArtMethod* virtual_method,
ArtMethod* method_in_super,
@@ -129,6 +131,23 @@
PointerSize pointer_size)
REQUIRES_SHARED(Locks::mutator_lock_);
+ // Check/update single-implementation info when one method
+ // implements an interface method.
+ // `implementation_method` in `klass` implements `interface_method`.
+ // Append `interface_method` to `invalidated_single_impl_methods`
+ // if `interface_method` gets a new implementation.
+ void CheckInterfaceMethodSingleImplementationInfo(
+ Handle<mirror::Class> klass,
+ ArtMethod* interface_method,
+ ArtMethod* implementation_method,
+ std::unordered_set<ArtMethod*>& invalidated_single_impl_methods,
+ PointerSize pointer_size)
+ REQUIRES_SHARED(Locks::mutator_lock_);
+
+ void InvalidateSingleImplementationMethods(
+ std::unordered_set<ArtMethod*>& invalidated_single_impl_methods)
+ REQUIRES_SHARED(Locks::mutator_lock_);
+
// For all methods in vtable slot at `verify_index` of `verify_class` and its
// superclasses, single-implementation status should be false, except if the
// method is `excluded_method`.
diff --git a/test/616-cha-abstract/src/Main.java b/test/616-cha-abstract/src/Main.java
index e1d7db1..b33f575 100644
--- a/test/616-cha-abstract/src/Main.java
+++ b/test/616-cha-abstract/src/Main.java
@@ -39,8 +39,8 @@
}
public class Main {
- static Main1 sMain1;
- static Main1 sMain2;
+ static Base sMain1;
+ static Base sMain2;
static boolean sIsOptimizing = true;
static boolean sHasJIT = true;
diff --git a/test/616-cha-interface-default/expected.txt b/test/616-cha-interface-default/expected.txt
new file mode 100644
index 0000000..6a5618e
--- /dev/null
+++ b/test/616-cha-interface-default/expected.txt
@@ -0,0 +1 @@
+JNI_OnLoad called
diff --git a/test/616-cha-interface-default/info.txt b/test/616-cha-interface-default/info.txt
new file mode 100644
index 0000000..1fd330a
--- /dev/null
+++ b/test/616-cha-interface-default/info.txt
@@ -0,0 +1 @@
+Test for Class Hierarchy Analysis (CHA) on interface method.
diff --git a/test/616-cha-interface-default/run b/test/616-cha-interface-default/run
new file mode 100644
index 0000000..d8b4f0d
--- /dev/null
+++ b/test/616-cha-interface-default/run
@@ -0,0 +1,18 @@
+#!/bin/bash
+#
+# 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.
+
+# Run without an app image to prevent the classes to be loaded at startup.
+exec ${RUN} "${@}" --no-app-image
diff --git a/test/616-cha-interface-default/src/Main.java b/test/616-cha-interface-default/src/Main.java
new file mode 100644
index 0000000..81895b0
--- /dev/null
+++ b/test/616-cha-interface-default/src/Main.java
@@ -0,0 +1,176 @@
+/*
+ * 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.
+ */
+
+interface Base {
+ default public void foo(int i) {
+ if (i != 1) {
+ printError("error1");
+ }
+ }
+
+ default void printError(String msg) {
+ System.out.println(msg);
+ }
+}
+
+class Main1 implements Base {
+}
+
+class Main2 extends Main1 {
+ public void bar() {}
+}
+
+class Main3 implements Base {
+ public void foo(int i) {
+ if (i != 3) {
+ printError("error3");
+ }
+ }
+}
+
+public class Main {
+ static Base sMain1;
+ static Base sMain2;
+ static Base sMain3;
+
+ static boolean sIsOptimizing = true;
+ static boolean sHasJIT = true;
+ static volatile boolean sOtherThreadStarted;
+
+ private static void assertSingleImplementation(Class<?> clazz, String method_name, boolean b) {
+ if (hasSingleImplementation(clazz, method_name) != b) {
+ System.out.println(clazz + "." + method_name +
+ " doesn't have single implementation value of " + b);
+ }
+ }
+
+ static int getValue(Class<?> cls) {
+ if (cls == Main1.class || cls == Main2.class) {
+ return 1;
+ }
+ return 3;
+ }
+
+ // sMain1.foo()/sMain2.foo() will be always be Base.foo() before Main3 is loaded/linked.
+ // So sMain1.foo() can be devirtualized to Base.foo() and be inlined.
+ // After Dummy.createMain3() which links in Main3, live testImplement() on stack
+ // should be deoptimized.
+ static void testImplement(boolean createMain3, boolean wait, boolean setHasJIT) {
+ if (setHasJIT) {
+ if (isInterpreted()) {
+ sHasJIT = false;
+ }
+ return;
+ }
+
+ if (createMain3 && (sIsOptimizing || sHasJIT)) {
+ assertIsManaged();
+ }
+
+ sMain1.foo(getValue(sMain1.getClass()));
+ sMain2.foo(getValue(sMain2.getClass()));
+
+ if (createMain3) {
+ // Wait for the other thread to start.
+ while (!sOtherThreadStarted);
+ // Create an Main2 instance and assign it to sMain2.
+ // sMain1 is kept the same.
+ sMain3 = Dummy.createMain3();
+ // Wake up the other thread.
+ synchronized(Main.class) {
+ Main.class.notify();
+ }
+ } else if (wait) {
+ // This is the other thread.
+ synchronized(Main.class) {
+ sOtherThreadStarted = true;
+ // Wait for Main2 to be linked and deoptimization is triggered.
+ try {
+ Main.class.wait();
+ } catch (Exception e) {
+ }
+ }
+ }
+
+ // There should be a deoptimization here right after Main3 is linked by
+ // calling Dummy.createMain3(), even though sMain1 didn't change.
+ // The behavior here would be different if inline-cache is used, which
+ // doesn't deoptimize since sMain1 still hits the type cache.
+ sMain1.foo(getValue(sMain1.getClass()));
+ if ((createMain3 || wait) && sHasJIT && !sIsOptimizing) {
+ // This method should be deoptimized right after Main3 is created.
+ assertIsInterpreted();
+ }
+
+ if (sMain3 != null) {
+ sMain3.foo(getValue(sMain3.getClass()));
+ }
+ }
+
+ // Test scenarios under which CHA-based devirtualization happens,
+ // and class loading that implements a method can invalidate compiled code.
+ public static void main(String[] args) {
+ System.loadLibrary(args[0]);
+
+ if (isInterpreted()) {
+ sIsOptimizing = false;
+ }
+
+ // sMain1 is an instance of Main1.
+ // sMain2 is an instance of Main2.
+ // Neither Main1 nor Main2 override default method Base.foo().
+ // Main3 hasn't bee loaded yet.
+ sMain1 = new Main1();
+ sMain2 = new Main2();
+
+ ensureJitCompiled(Main.class, "testImplement");
+ testImplement(false, false, true);
+
+ if (sHasJIT && !sIsOptimizing) {
+ assertSingleImplementation(Base.class, "foo", true);
+ assertSingleImplementation(Main1.class, "foo", true);
+ } else {
+ // Main3 is verified ahead-of-time so it's linked in already.
+ }
+
+ // Create another thread that also calls sMain1.foo().
+ // Try to test suspend and deopt another thread.
+ new Thread() {
+ public void run() {
+ testImplement(false, true, false);
+ }
+ }.start();
+
+ // This will create Main3 instance in the middle of testImplement().
+ testImplement(true, false, false);
+ assertSingleImplementation(Base.class, "foo", false);
+ assertSingleImplementation(Main1.class, "foo", true);
+ assertSingleImplementation(sMain3.getClass(), "foo", true);
+ }
+
+ private static native void ensureJitCompiled(Class<?> itf, String method_name);
+ private static native void assertIsInterpreted();
+ private static native void assertIsManaged();
+ private static native boolean isInterpreted();
+ private static native boolean hasSingleImplementation(Class<?> clazz, String method_name);
+}
+
+// Put createMain3() in another class to avoid class loading due to verifier.
+class Dummy {
+ static Base createMain3() {
+ return new Main3();
+ }
+}
diff --git a/test/616-cha-interface/expected.txt b/test/616-cha-interface/expected.txt
new file mode 100644
index 0000000..6a5618e
--- /dev/null
+++ b/test/616-cha-interface/expected.txt
@@ -0,0 +1 @@
+JNI_OnLoad called
diff --git a/test/616-cha-interface/info.txt b/test/616-cha-interface/info.txt
new file mode 100644
index 0000000..1fd330a
--- /dev/null
+++ b/test/616-cha-interface/info.txt
@@ -0,0 +1 @@
+Test for Class Hierarchy Analysis (CHA) on interface method.
diff --git a/test/616-cha-interface/run b/test/616-cha-interface/run
new file mode 100644
index 0000000..d8b4f0d
--- /dev/null
+++ b/test/616-cha-interface/run
@@ -0,0 +1,18 @@
+#!/bin/bash
+#
+# 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.
+
+# Run without an app image to prevent the classes to be loaded at startup.
+exec ${RUN} "${@}" --no-app-image
diff --git a/test/616-cha-interface/src/Main.java b/test/616-cha-interface/src/Main.java
new file mode 100644
index 0000000..aee6a95
--- /dev/null
+++ b/test/616-cha-interface/src/Main.java
@@ -0,0 +1,159 @@
+/*
+ * 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.
+ */
+
+interface Base {
+ void foo(int i);
+}
+
+class Main1 implements Base {
+ public void foo(int i) {
+ if (i != 1) {
+ printError("error1");
+ }
+ }
+
+ void printError(String msg) {
+ System.out.println(msg);
+ }
+}
+
+class Main2 extends Main1 {
+ public void foo(int i) {
+ if (i != 2) {
+ printError("error2");
+ }
+ }
+}
+
+public class Main {
+ static Base sMain1;
+ static Base sMain2;
+
+ static boolean sIsOptimizing = true;
+ static boolean sHasJIT = true;
+ static volatile boolean sOtherThreadStarted;
+
+ private static void assertSingleImplementation(Class<?> clazz, String method_name, boolean b) {
+ if (hasSingleImplementation(clazz, method_name) != b) {
+ System.out.println(clazz + "." + method_name +
+ " doesn't have single implementation value of " + b);
+ }
+ }
+
+ // sMain1.foo() will be always be Main1.foo() before Main2 is loaded/linked.
+ // So sMain1.foo() can be devirtualized to Main1.foo() and be inlined.
+ // After Dummy.createMain2() which links in Main2, live testImplement() on stack
+ // should be deoptimized.
+ static void testImplement(boolean createMain2, boolean wait, boolean setHasJIT) {
+ if (setHasJIT) {
+ if (isInterpreted()) {
+ sHasJIT = false;
+ }
+ return;
+ }
+
+ if (createMain2 && (sIsOptimizing || sHasJIT)) {
+ assertIsManaged();
+ }
+
+ sMain1.foo(sMain1.getClass() == Main1.class ? 1 : 2);
+
+ if (createMain2) {
+ // Wait for the other thread to start.
+ while (!sOtherThreadStarted);
+ // Create an Main2 instance and assign it to sMain2.
+ // sMain1 is kept the same.
+ sMain2 = Dummy.createMain2();
+ // Wake up the other thread.
+ synchronized(Main.class) {
+ Main.class.notify();
+ }
+ } else if (wait) {
+ // This is the other thread.
+ synchronized(Main.class) {
+ sOtherThreadStarted = true;
+ // Wait for Main2 to be linked and deoptimization is triggered.
+ try {
+ Main.class.wait();
+ } catch (Exception e) {
+ }
+ }
+ }
+
+ // There should be a deoptimization here right after Main2 is linked by
+ // calling Dummy.createMain2(), even though sMain1 didn't change.
+ // The behavior here would be different if inline-cache is used, which
+ // doesn't deoptimize since sMain1 still hits the type cache.
+ sMain1.foo(sMain1.getClass() == Main1.class ? 1 : 2);
+ if ((createMain2 || wait) && sHasJIT && !sIsOptimizing) {
+ // This method should be deoptimized right after Main2 is created.
+ assertIsInterpreted();
+ }
+
+ if (sMain2 != null) {
+ sMain2.foo(sMain2.getClass() == Main1.class ? 1 : 2);
+ }
+ }
+
+ // Test scenarios under which CHA-based devirtualization happens,
+ // and class loading that overrides a method can invalidate compiled code.
+ public static void main(String[] args) {
+ System.loadLibrary(args[0]);
+
+ if (isInterpreted()) {
+ sIsOptimizing = false;
+ }
+
+ // sMain1 is an instance of Main1. Main2 hasn't bee loaded yet.
+ sMain1 = new Main1();
+
+ ensureJitCompiled(Main.class, "testImplement");
+ testImplement(false, false, true);
+
+ if (sHasJIT && !sIsOptimizing) {
+ assertSingleImplementation(Base.class, "foo", true);
+ assertSingleImplementation(Main1.class, "foo", true);
+ } else {
+ // Main2 is verified ahead-of-time so it's linked in already.
+ }
+
+ // Create another thread that also calls sMain1.foo().
+ // Try to test suspend and deopt another thread.
+ new Thread() {
+ public void run() {
+ testImplement(false, true, false);
+ }
+ }.start();
+
+ // This will create Main2 instance in the middle of testImplement().
+ testImplement(true, false, false);
+ assertSingleImplementation(Base.class, "foo", false);
+ assertSingleImplementation(Main1.class, "foo", false);
+ }
+
+ private static native void ensureJitCompiled(Class<?> itf, String method_name);
+ private static native void assertIsInterpreted();
+ private static native void assertIsManaged();
+ private static native boolean isInterpreted();
+ private static native boolean hasSingleImplementation(Class<?> clazz, String method_name);
+}
+
+// Put createMain2() in another class to avoid class loading due to verifier.
+class Dummy {
+ static Main1 createMain2() {
+ return new Main2();
+ }
+}
diff --git a/test/616-cha-miranda/expected.txt b/test/616-cha-miranda/expected.txt
new file mode 100644
index 0000000..6a5618e
--- /dev/null
+++ b/test/616-cha-miranda/expected.txt
@@ -0,0 +1 @@
+JNI_OnLoad called
diff --git a/test/616-cha-miranda/info.txt b/test/616-cha-miranda/info.txt
new file mode 100644
index 0000000..c46f33f
--- /dev/null
+++ b/test/616-cha-miranda/info.txt
@@ -0,0 +1 @@
+Test for Class Hierarchy Analysis (CHA) on miranda method.
diff --git a/test/616-cha-miranda/run b/test/616-cha-miranda/run
new file mode 100644
index 0000000..d8b4f0d
--- /dev/null
+++ b/test/616-cha-miranda/run
@@ -0,0 +1,18 @@
+#!/bin/bash
+#
+# 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.
+
+# Run without an app image to prevent the classes to be loaded at startup.
+exec ${RUN} "${@}" --no-app-image
diff --git a/test/616-cha-miranda/src/Main.java b/test/616-cha-miranda/src/Main.java
new file mode 100644
index 0000000..e548482
--- /dev/null
+++ b/test/616-cha-miranda/src/Main.java
@@ -0,0 +1,163 @@
+/*
+ * 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.
+ */
+
+interface Iface {
+ public void foo(int i);
+}
+
+abstract class Base implements Iface {
+ // Iface.foo(int) will be added as a miranda method.
+
+ void printError(String msg) {
+ System.out.println(msg);
+ }
+}
+
+class Main1 extends Base {
+ public void foo(int i) {
+ if (i != 1) {
+ printError("error1");
+ }
+ }
+}
+
+class Main2 extends Main1 {
+ public void foo(int i) {
+ if (i != 2) {
+ printError("error2");
+ }
+ }
+}
+
+public class Main {
+ static Base sMain1;
+ static Base sMain2;
+
+ static boolean sIsOptimizing = true;
+ static boolean sHasJIT = true;
+ static volatile boolean sOtherThreadStarted;
+
+ private static void assertSingleImplementation(Class<?> clazz, String method_name, boolean b) {
+ if (hasSingleImplementation(clazz, method_name) != b) {
+ System.out.println(clazz + "." + method_name +
+ " doesn't have single implementation value of " + b);
+ }
+ }
+
+ // sMain1.foo() will be always be Main1.foo() before Main2 is loaded/linked.
+ // So sMain1.foo() can be devirtualized to Main1.foo() and be inlined.
+ // After Dummy.createMain2() which links in Main2, live testOverride() on stack
+ // should be deoptimized.
+ static void testOverride(boolean createMain2, boolean wait, boolean setHasJIT) {
+ if (setHasJIT) {
+ if (isInterpreted()) {
+ sHasJIT = false;
+ }
+ return;
+ }
+
+ if (createMain2 && (sIsOptimizing || sHasJIT)) {
+ assertIsManaged();
+ }
+
+ sMain1.foo(sMain1.getClass() == Main1.class ? 1 : 2);
+
+ if (createMain2) {
+ // Wait for the other thread to start.
+ while (!sOtherThreadStarted);
+ // Create an Main2 instance and assign it to sMain2.
+ // sMain1 is kept the same.
+ sMain2 = Dummy.createMain2();
+ // Wake up the other thread.
+ synchronized(Main.class) {
+ Main.class.notify();
+ }
+ } else if (wait) {
+ // This is the other thread.
+ synchronized(Main.class) {
+ sOtherThreadStarted = true;
+ // Wait for Main2 to be linked and deoptimization is triggered.
+ try {
+ Main.class.wait();
+ } catch (Exception e) {
+ }
+ }
+ }
+
+ // There should be a deoptimization here right after Main2 is linked by
+ // calling Dummy.createMain2(), even though sMain1 didn't change.
+ // The behavior here would be different if inline-cache is used, which
+ // doesn't deoptimize since sMain1 still hits the type cache.
+ sMain1.foo(sMain1.getClass() == Main1.class ? 1 : 2);
+ if ((createMain2 || wait) && sHasJIT && !sIsOptimizing) {
+ // This method should be deoptimized right after Main2 is created.
+ assertIsInterpreted();
+ }
+
+ if (sMain2 != null) {
+ sMain2.foo(sMain2.getClass() == Main1.class ? 1 : 2);
+ }
+ }
+
+ // Test scenarios under which CHA-based devirtualization happens,
+ // and class loading that overrides a method can invalidate compiled code.
+ public static void main(String[] args) {
+ System.loadLibrary(args[0]);
+
+ if (isInterpreted()) {
+ sIsOptimizing = false;
+ }
+
+ // sMain1 is an instance of Main1. Main2 hasn't bee loaded yet.
+ sMain1 = new Main1();
+
+ ensureJitCompiled(Main.class, "testOverride");
+ testOverride(false, false, true);
+
+ if (sHasJIT && !sIsOptimizing) {
+ assertSingleImplementation(Base.class, "foo", true);
+ assertSingleImplementation(Main1.class, "foo", true);
+ } else {
+ // Main2 is verified ahead-of-time so it's linked in already.
+ }
+
+ // Create another thread that also calls sMain1.foo().
+ // Try to test suspend and deopt another thread.
+ new Thread() {
+ public void run() {
+ testOverride(false, true, false);
+ }
+ }.start();
+
+ // This will create Main2 instance in the middle of testOverride().
+ testOverride(true, false, false);
+ assertSingleImplementation(Base.class, "foo", false);
+ assertSingleImplementation(Main1.class, "foo", false);
+ }
+
+ private static native void ensureJitCompiled(Class<?> itf, String method_name);
+ private static native void assertIsInterpreted();
+ private static native void assertIsManaged();
+ private static native boolean isInterpreted();
+ private static native boolean hasSingleImplementation(Class<?> clazz, String method_name);
+}
+
+// Put createMain2() in another class to avoid class loading due to verifier.
+class Dummy {
+ static Main1 createMain2() {
+ return new Main2();
+ }
+}
