namespace art {
inline ArtMethod* GetResolvedMethod(ArtMethod* outer_method,
- uint32_t method_index,
- InvokeType invoke_type)
+ const InlineInfo& inline_info,
+ uint8_t inlining_depth)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
+ uint32_t method_index = inline_info.GetMethodIndexAtDepth(inlining_depth);
+ InvokeType invoke_type = static_cast<InvokeType>(
+ inline_info.GetInvokeTypeAtDepth(inlining_depth));
ArtMethod* caller = outer_method->GetDexCacheResolvedMethod(method_index, sizeof(void*));
if (!caller->IsRuntimeMethod()) {
return caller;
// The method in the dex cache can be the runtime method responsible for invoking
// the stub that will then update the dex cache. Therefore, we need to do the
// resolution ourselves.
-
+
+ // We first find the class loader of our caller. If it is the outer method, we can directly
+ // use its class loader. Otherwise, we also need to resolve our caller.
StackHandleScope<2> hs(Thread::Current());
ClassLinker* class_linker = Runtime::Current()->GetClassLinker();
- Handle<mirror::ClassLoader> class_loader(hs.NewHandle(outer_method->GetClassLoader()));
+ MutableHandle<mirror::ClassLoader> class_loader(hs.NewHandle<mirror::Class>(nullptr));
Handle<mirror::DexCache> dex_cache(hs.NewHandle(outer_method->GetDexCache()));
+ if (inlining_depth == 0) {
+ class_loader.Assign(outer_method->GetClassLoader());
+ } else {
+ caller = GetResolvedMethod(outer_method, inline_info, inlining_depth - 1);
+ class_loader.Assign(caller->GetClassLoader());
+ }
+
return class_linker->ResolveMethod(
*outer_method->GetDexFile(), method_index, dex_cache, class_loader, nullptr, invoke_type);
}
DCHECK(stack_map.IsValid());
if (stack_map.HasInlineInfo(encoding)) {
InlineInfo inline_info = code_info.GetInlineInfoOf(stack_map, encoding);
- uint32_t method_index = inline_info.GetMethodIndexAtDepth(inline_info.GetDepth() - 1);
- InvokeType invoke_type = static_cast<InvokeType>(
- inline_info.GetInvokeTypeAtDepth(inline_info.GetDepth() - 1));
- caller = GetResolvedMethod(outer_method, method_index, invoke_type);
+ caller = GetResolvedMethod(outer_method, inline_info, inline_info.GetDepth() - 1);
}
}
if (IsInInlinedFrame()) {
size_t depth_in_stack_map = current_inlining_depth_ - 1;
InlineInfo inline_info = GetCurrentInlineInfo();
- uint32_t method_index = inline_info.GetMethodIndexAtDepth(depth_in_stack_map);
- InvokeType invoke_type =
- static_cast<InvokeType>(inline_info.GetInvokeTypeAtDepth(depth_in_stack_map));
- return GetResolvedMethod(*GetCurrentQuickFrame(), method_index, invoke_type);
+ return GetResolvedMethod(*GetCurrentQuickFrame(), inline_info, depth_in_stack_map);
} else {
return *cur_quick_frame_;
}
--- /dev/null
+/*
+ * Copyright (C) 2015 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.
+ */
+
+#include "art_method-inl.h"
+#include "jni.h"
+#include "scoped_thread_state_change.h"
+#include "stack.h"
+#include "thread.h"
+
+namespace art {
+
+namespace {
+
+extern "C" JNIEXPORT jobject JNICALL Java_Main_cloneResolvedMethods(JNIEnv*, jclass, jclass cls) {
+ ScopedObjectAccess soa(Thread::Current());
+ return soa.Vm()->AddGlobalRef(
+ soa.Self(),
+ soa.Decode<mirror::Class*>(cls)->GetDexCache()->GetResolvedMethods()->Clone(soa.Self()));
+}
+
+extern "C" JNIEXPORT void JNICALL Java_Main_restoreResolvedMethods(
+ JNIEnv*, jclass, jclass cls, jobject old_cache) {
+ ScopedObjectAccess soa(Thread::Current());
+ mirror::PointerArray* now = soa.Decode<mirror::Class*>(cls)->GetDexCache()->GetResolvedMethods();
+ mirror::PointerArray* old = soa.Decode<mirror::PointerArray*>(old_cache);
+ for (size_t i = 0, e = old->GetLength(); i < e; ++i) {
+ now->SetElementPtrSize(i, old->GetElementPtrSize<void*>(i, sizeof(void*)), sizeof(void*));
+ }
+}
+
+} // namespace
+
+} // namespace art
--- /dev/null
+java.lang.Exception
+ at Main.$noinline$bar(Main.java:139)
+ at Level2.$inline$bar(Main.java:88)
+ at Level1.$inline$bar(Main.java:82)
+ at LoadedByMyClassLoader.bar(Main.java:94)
+ at java.lang.reflect.Method.invoke(Native Method)
+ at Main.main(Main.java:113)
--- /dev/null
+Regression test for optimizing to ensure it is using
+the correct class loader when walking inlined frames.
--- /dev/null
+/*
+ * Copyright (C) 2015 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.
+ */
+
+import java.lang.reflect.Field;
+import java.lang.reflect.Method;
+import java.util.List;
+
+class MyClassLoader extends ClassLoader {
+ MyClassLoader() throws Exception {
+ super(MyClassLoader.class.getClassLoader());
+
+ // Some magic to get access to the pathList field of BaseDexClassLoader.
+ ClassLoader loader = getClass().getClassLoader();
+ Class<?> baseDexClassLoader = loader.getClass().getSuperclass();
+ Field f = baseDexClassLoader.getDeclaredField("pathList");
+ f.setAccessible(true);
+ Object pathList = f.get(loader);
+
+ // Some magic to get access to the dexField field of pathList.
+ f = pathList.getClass().getDeclaredField("dexElements");
+ f.setAccessible(true);
+ dexElements = (Object[]) f.get(pathList);
+ dexFileField = dexElements[0].getClass().getDeclaredField("dexFile");
+ dexFileField.setAccessible(true);
+ }
+
+ Object[] dexElements;
+ Field dexFileField;
+
+ static ClassLoader level1ClassLoader;
+
+ protected Class<?> loadClass(String className, boolean resolve) throws ClassNotFoundException {
+ if (this != level1ClassLoader) {
+ if (className.equals("Level1")) {
+ return level1ClassLoader.loadClass(className);
+ } else if (className.equals("Level2")) {
+ throw new ClassNotFoundException("None of my methods require Level2!");
+ } else if (!className.equals("LoadedByMyClassLoader")) {
+ // We're only going to handle LoadedByMyClassLoader.
+ return getParent().loadClass(className);
+ }
+ } else {
+ if (className != "Level1" && className != "Level2") {
+ return getParent().loadClass(className);
+ }
+ }
+
+ // Mimic what DexPathList.findClass is doing.
+ try {
+ for (Object element : dexElements) {
+ Object dex = dexFileField.get(element);
+ Method method = dex.getClass().getDeclaredMethod(
+ "loadClassBinaryName", String.class, ClassLoader.class, List.class);
+
+ if (dex != null) {
+ Class clazz = (Class)method.invoke(dex, className, this, null);
+ if (clazz != null) {
+ return clazz;
+ }
+ }
+ }
+ } catch (Exception e) { /* Ignore */ }
+ return null;
+ }
+}
+
+class Level1 {
+ public static void $inline$bar() {
+ Level2.$inline$bar();
+ }
+}
+
+class Level2 {
+ public static void $inline$bar() {
+ Main.$noinline$bar();
+ }
+}
+
+class LoadedByMyClassLoader {
+ public static void bar() {
+ Level1.$inline$bar();
+ }
+}
+
+class Main {
+ static {
+ System.loadLibrary("arttest");
+ }
+
+ public static void main(String[] args) throws Exception {
+ // Clone resolved methods, to restore the original version just
+ // before we walk the stack in $noinline$bar.
+ savedResolvedMethods = cloneResolvedMethods(Main.class);
+
+ MyClassLoader o = new MyClassLoader();
+ MyClassLoader.level1ClassLoader = new MyClassLoader();
+ Class foo = o.loadClass("LoadedByMyClassLoader");
+ Method m = foo.getDeclaredMethod("bar");
+ try {
+ m.invoke(null);
+ } catch (Error e) { /* Ignore */ }
+ }
+
+ public static void $inline$bar() {
+ }
+
+ public static void $noinline$bar() {
+ try {
+ // Be evil and clear all dex cache entries.
+ Field f = Class.class.getDeclaredField("dexCache");
+ f.setAccessible(true);
+ Object dexCache = f.get(Main.class);
+ f = dexCache.getClass().getDeclaredField("resolvedTypes");
+ f.setAccessible(true);
+ Object[] array = (Object[]) f.get(dexCache);
+ for (int i = 0; i < array.length; i++) {
+ array[i] = null;
+ }
+ restoreResolvedMethods(Main.class, savedResolvedMethods);
+ } catch (Throwable t) { /* Ignore */ }
+
+ // This will walk the stack, trying to resolve methods in it.
+ // Because we cleared dex cache entries, we will have to find
+ // classes again, which require to use the correct class loader
+ // in the presence of inlining.
+ new Exception().printStackTrace();
+ }
+ static Object savedResolvedMethods;
+
+ static native Object cloneResolvedMethods(Class<?> cls);
+ static native void restoreResolvedMethods(Class<?> cls, Object saved);
+}
455-set-vreg/set_vreg_jni.cc \
457-regs/regs_jni.cc \
461-get-reference-vreg/get_reference_vreg_jni.cc \
- 466-get-live-vreg/get_live_vreg_jni.cc
+ 466-get-live-vreg/get_live_vreg_jni.cc \
+ 497-inlining-and-class-loader/clear_dex_cache.cc
ART_TARGET_LIBARTTEST_$(ART_PHONY_TEST_TARGET_SUFFIX) += $(ART_TARGET_TEST_OUT)/$(TARGET_ARCH)/libarttest.so
ifdef TARGET_2ND_ARCH
457-regs \
461-get-reference-vreg \
466-get-live-vreg \
+ 497-inlining-and-class-loader \
ifneq (,$(filter ndebug,$(RUN_TYPES)))
ART_TEST_KNOWN_BROKEN += $(call all-run-test-names,$(TARGET_TYPES),ndebug,$(PREBUILD_TYPES), \
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