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-rw-r--r--runtime/class_linker.h8
-rw-r--r--runtime/openjdkjvmti/OpenjdkJvmTi.cc2
-rw-r--r--runtime/openjdkjvmti/ti_class.cc89
-rw-r--r--runtime/openjdkjvmti/ti_class.h5
-rw-r--r--test/912-classes/classes.cc19
-rw-r--r--test/912-classes/expected.txt16
-rw-r--r--test/912-classes/src-ex/A.java18
-rw-r--r--test/912-classes/src/B.java18
-rw-r--r--test/912-classes/src/Main.java116
9 files changed, 285 insertions, 6 deletions
diff --git a/runtime/class_linker.h b/runtime/class_linker.h
index 580acb7068..cad674e472 100644
--- a/runtime/class_linker.h
+++ b/runtime/class_linker.h
@@ -645,6 +645,10 @@ class ClassLinker {
mirror::Class* GetHoldingClassOfCopiedMethod(ArtMethod* method)
REQUIRES_SHARED(Locks::mutator_lock_);
+ // Returns null if not found.
+ ClassTable* ClassTableForClassLoader(ObjPtr<mirror::ClassLoader> class_loader)
+ REQUIRES_SHARED(Locks::mutator_lock_);
+
struct DexCacheData {
// Weak root to the DexCache. Note: Do not decode this unnecessarily or else class unloading may
// not work properly.
@@ -1039,10 +1043,6 @@ class ClassLinker {
REQUIRES_SHARED(Locks::mutator_lock_)
REQUIRES(Locks::classlinker_classes_lock_);
- // Returns null if not found.
- ClassTable* ClassTableForClassLoader(ObjPtr<mirror::ClassLoader> class_loader)
- REQUIRES_SHARED(Locks::mutator_lock_);
-
// Insert a new class table if not found.
ClassTable* InsertClassTableForClassLoader(ObjPtr<mirror::ClassLoader> class_loader)
REQUIRES_SHARED(Locks::mutator_lock_)
diff --git a/runtime/openjdkjvmti/OpenjdkJvmTi.cc b/runtime/openjdkjvmti/OpenjdkJvmTi.cc
index 367b60d630..3825c41e76 100644
--- a/runtime/openjdkjvmti/OpenjdkJvmTi.cc
+++ b/runtime/openjdkjvmti/OpenjdkJvmTi.cc
@@ -537,7 +537,7 @@ class JvmtiFunctions {
jobject initiating_loader,
jint* class_count_ptr,
jclass** classes_ptr) {
- return ERR(NOT_IMPLEMENTED);
+ return ClassUtil::GetClassLoaderClasses(env, initiating_loader, class_count_ptr, classes_ptr);
}
static jvmtiError GetClassSignature(jvmtiEnv* env,
diff --git a/runtime/openjdkjvmti/ti_class.cc b/runtime/openjdkjvmti/ti_class.cc
index 0d1704ca4d..d1324bc13f 100644
--- a/runtime/openjdkjvmti/ti_class.cc
+++ b/runtime/openjdkjvmti/ti_class.cc
@@ -32,7 +32,10 @@
#include "ti_class.h"
#include "art_jvmti.h"
+#include "class_table-inl.h"
+#include "class_linker.h"
#include "jni_internal.h"
+#include "runtime.h"
#include "scoped_thread_state_change-inl.h"
#include "thread-inl.h"
@@ -328,4 +331,90 @@ jvmtiError ClassUtil::GetClassLoader(jvmtiEnv* env ATTRIBUTE_UNUSED,
return ERR(NONE);
}
+jvmtiError ClassUtil::GetClassLoaderClasses(jvmtiEnv* env,
+ jobject initiating_loader,
+ jint* class_count_ptr,
+ jclass** classes_ptr) {
+ UNUSED(env, initiating_loader, class_count_ptr, classes_ptr);
+
+ if (class_count_ptr == nullptr || classes_ptr == nullptr) {
+ return ERR(NULL_POINTER);
+ }
+ art::Thread* self = art::Thread::Current();
+ if (!self->GetJniEnv()->IsInstanceOf(initiating_loader,
+ art::WellKnownClasses::java_lang_ClassLoader)) {
+ return ERR(ILLEGAL_ARGUMENT);
+ }
+ if (self->GetJniEnv()->IsInstanceOf(initiating_loader,
+ art::WellKnownClasses::java_lang_BootClassLoader)) {
+ // Need to use null for the BootClassLoader.
+ initiating_loader = nullptr;
+ }
+
+ art::ScopedObjectAccess soa(self);
+ art::ObjPtr<art::mirror::ClassLoader> class_loader =
+ soa.Decode<art::mirror::ClassLoader>(initiating_loader);
+
+ art::ClassLinker* class_linker = art::Runtime::Current()->GetClassLinker();
+
+ art::ReaderMutexLock mu(self, *art::Locks::classlinker_classes_lock_);
+
+ art::ClassTable* class_table = class_linker->ClassTableForClassLoader(class_loader);
+ if (class_table == nullptr) {
+ // Nothing loaded.
+ *class_count_ptr = 0;
+ *classes_ptr = nullptr;
+ return ERR(NONE);
+ }
+
+ struct ClassTableCount {
+ bool operator()(art::ObjPtr<art::mirror::Class> klass) {
+ DCHECK(klass != nullptr);
+ ++count;
+ return true;
+ }
+
+ size_t count = 0;
+ };
+ ClassTableCount ctc;
+ class_table->Visit(ctc);
+
+ if (ctc.count == 0) {
+ // Nothing loaded.
+ *class_count_ptr = 0;
+ *classes_ptr = nullptr;
+ return ERR(NONE);
+ }
+
+ unsigned char* data;
+ jvmtiError data_result = env->Allocate(ctc.count * sizeof(jclass), &data);
+ if (data_result != ERR(NONE)) {
+ return data_result;
+ }
+ jclass* class_array = reinterpret_cast<jclass*>(data);
+
+ struct ClassTableFill {
+ bool operator()(art::ObjPtr<art::mirror::Class> klass)
+ REQUIRES_SHARED(art::Locks::mutator_lock_) {
+ DCHECK(klass != nullptr);
+ DCHECK_LT(count, ctc_ref.count);
+ local_class_array[count++] = soa_ptr->AddLocalReference<jclass>(klass);
+ return true;
+ }
+
+ jclass* local_class_array;
+ const ClassTableCount& ctc_ref;
+ art::ScopedObjectAccess* soa_ptr;
+ size_t count;
+ };
+ ClassTableFill ctf = { class_array, ctc, &soa, 0 };
+ class_table->Visit(ctf);
+ DCHECK_EQ(ctc.count, ctf.count);
+
+ *class_count_ptr = ctc.count;
+ *classes_ptr = class_array;
+
+ return ERR(NONE);
+}
+
} // namespace openjdkjvmti
diff --git a/runtime/openjdkjvmti/ti_class.h b/runtime/openjdkjvmti/ti_class.h
index 577fc8e866..7a0fafbc83 100644
--- a/runtime/openjdkjvmti/ti_class.h
+++ b/runtime/openjdkjvmti/ti_class.h
@@ -65,6 +65,11 @@ class ClassUtil {
static jvmtiError GetClassLoader(jvmtiEnv* env, jclass klass, jobject* classloader_ptr);
+ static jvmtiError GetClassLoaderClasses(jvmtiEnv* env,
+ jobject initiating_loader,
+ jint* class_count_ptr,
+ jclass** classes_ptr);
+
static jvmtiError IsInterface(jvmtiEnv* env, jclass klass, jboolean* is_interface_ptr);
static jvmtiError IsArrayClass(jvmtiEnv* env, jclass klass, jboolean* is_array_class_ptr);
};
diff --git a/test/912-classes/classes.cc b/test/912-classes/classes.cc
index 69301c7925..a22d1d72d8 100644
--- a/test/912-classes/classes.cc
+++ b/test/912-classes/classes.cc
@@ -222,5 +222,24 @@ extern "C" JNIEXPORT jobject JNICALL Java_Main_getClassLoader(
return classloader;
}
+extern "C" JNIEXPORT jobjectArray JNICALL Java_Main_getClassLoaderClasses(
+ JNIEnv* env, jclass Main_klass ATTRIBUTE_UNUSED, jobject jclassloader) {
+ jint count = 0;
+ jclass* classes = nullptr;
+ jvmtiError result = jvmti_env->GetClassLoaderClasses(jclassloader, &count, &classes);
+ if (JvmtiErrorToException(env, result)) {
+ return nullptr;
+ }
+
+ auto callback = [&](jint i) {
+ return classes[i];
+ };
+ jobjectArray ret = CreateObjectArray(env, count, "java/lang/Class", callback);
+ if (classes != nullptr) {
+ jvmti_env->Deallocate(reinterpret_cast<unsigned char*>(classes));
+ }
+ return ret;
+}
+
} // namespace Test912Classes
} // namespace art
diff --git a/test/912-classes/expected.txt b/test/912-classes/expected.txt
index 44c861a3b7..a95a465860 100644
--- a/test/912-classes/expected.txt
+++ b/test/912-classes/expected.txt
@@ -43,3 +43,19 @@ class java.lang.String null
class [Ljava.lang.String; null
interface Main$InfA dalvik.system.PathClassLoader
class $Proxy0 dalvik.system.PathClassLoader
+
+boot <- src <- src-ex (A,B)
+912-classes-ex.jar+ -> 912-classes.jar+ ->
+[class A, class B, class java.lang.Object]
+912-classes.jar+ ->
+[class B, class java.lang.Object]
+
+boot <- src (B) <- src-ex (A, List)
+912-classes-ex.jar+ -> 912-classes.jar+ ->
+[class A, class java.lang.Object, interface java.util.List]
+912-classes.jar+ ->
+[class B, class java.lang.Object]
+
+boot <- src+src-ex (A,B)
+912-classes.jar+ ->
+[class A, class B, class java.lang.Object]
diff --git a/test/912-classes/src-ex/A.java b/test/912-classes/src-ex/A.java
new file mode 100644
index 0000000000..64acb2fcfe
--- /dev/null
+++ b/test/912-classes/src-ex/A.java
@@ -0,0 +1,18 @@
+/*
+ * 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.
+ */
+
+public class A {
+} \ No newline at end of file
diff --git a/test/912-classes/src/B.java b/test/912-classes/src/B.java
new file mode 100644
index 0000000000..f1458c3bca
--- /dev/null
+++ b/test/912-classes/src/B.java
@@ -0,0 +1,18 @@
+/*
+ * 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.
+ */
+
+public class B {
+} \ No newline at end of file
diff --git a/test/912-classes/src/Main.java b/test/912-classes/src/Main.java
index e627d4227a..ea3c49c87b 100644
--- a/test/912-classes/src/Main.java
+++ b/test/912-classes/src/Main.java
@@ -14,8 +14,10 @@
* limitations under the License.
*/
+import java.lang.reflect.Constructor;
import java.lang.reflect.Proxy;
import java.util.Arrays;
+import java.util.Comparator;
public class Main {
public static void main(String[] args) throws Exception {
@@ -76,6 +78,8 @@ public class Main {
testClassLoader(String[].class);
testClassLoader(InfA.class);
testClassLoader(getProxyClass());
+
+ testClassLoaderClasses();
}
private static Class<?> proxyClass = null;
@@ -151,6 +155,95 @@ public class Main {
}
}
+ private static void testClassLoaderClasses() throws Exception {
+ ClassLoader boot = ClassLoader.getSystemClassLoader().getParent();
+ while (boot.getParent() != null) {
+ boot = boot.getParent();
+ }
+
+ System.out.println();
+ System.out.println("boot <- src <- src-ex (A,B)");
+ ClassLoader cl1 = create(create(boot, DEX1), DEX2);
+ Class.forName("B", false, cl1);
+ Class.forName("A", false, cl1);
+ printClassLoaderClasses(cl1);
+
+ System.out.println();
+ System.out.println("boot <- src (B) <- src-ex (A, List)");
+ ClassLoader cl2 = create(create(boot, DEX1), DEX2);
+ Class.forName("A", false, cl2);
+ Class.forName("java.util.List", false, cl2);
+ Class.forName("B", false, cl2.getParent());
+ printClassLoaderClasses(cl2);
+
+ System.out.println();
+ System.out.println("boot <- src+src-ex (A,B)");
+ ClassLoader cl3 = create(boot, DEX1, DEX2);
+ Class.forName("B", false, cl3);
+ Class.forName("A", false, cl3);
+ printClassLoaderClasses(cl3);
+
+ // Check that the boot classloader dumps something non-empty.
+ Class<?>[] bootClasses = getClassLoaderClasses(boot);
+ if (bootClasses.length == 0) {
+ throw new RuntimeException("No classes initiated by boot classloader.");
+ }
+ // Check that at least java.util.List is loaded.
+ boolean foundList = false;
+ for (Class<?> c : bootClasses) {
+ if (c == java.util.List.class) {
+ foundList = true;
+ break;
+ }
+ }
+ if (!foundList) {
+ System.out.println(Arrays.toString(bootClasses));
+ throw new RuntimeException("Could not find class java.util.List.");
+ }
+ }
+
+ private static void printClassLoaderClasses(ClassLoader cl) {
+ for (;;) {
+ if (cl == null || !cl.getClass().getName().startsWith("dalvik.system")) {
+ break;
+ }
+
+ ClassLoader saved = cl;
+ for (;;) {
+ if (cl == null || !cl.getClass().getName().startsWith("dalvik.system")) {
+ break;
+ }
+ String s = cl.toString();
+ int index1 = s.indexOf("zip file");
+ int index2 = s.indexOf(']', index1);
+ if (index2 < 0) {
+ throw new RuntimeException("Unexpected classloader " + s);
+ }
+ String zip_file = s.substring(index1, index2);
+ int index3 = zip_file.indexOf('"');
+ int index4 = zip_file.indexOf('"', index3 + 1);
+ if (index4 < 0) {
+ throw new RuntimeException("Unexpected classloader " + s);
+ }
+ String paths = zip_file.substring(index3 + 1, index4);
+ String pathArray[] = paths.split(":");
+ for (String path : pathArray) {
+ int index5 = path.lastIndexOf('/');
+ System.out.print(path.substring(index5 + 1));
+ System.out.print('+');
+ }
+ System.out.print(" -> ");
+ cl = cl.getParent();
+ }
+ System.out.println();
+ Class<?> classes[] = getClassLoaderClasses(saved);
+ Arrays.sort(classes, new ClassNameComparator());
+ System.out.println(Arrays.toString(classes));
+
+ cl = saved.getParent();
+ }
+ }
+
private static native boolean isModifiableClass(Class<?> c);
private static native String[] getClassSignature(Class<?> c);
@@ -161,12 +254,14 @@ public class Main {
private static native Object[] getClassFields(Class<?> c);
private static native Object[] getClassMethods(Class<?> c);
- private static native Class[] getImplementedInterfaces(Class<?> c);
+ private static native Class<?>[] getImplementedInterfaces(Class<?> c);
private static native int getClassStatus(Class<?> c);
private static native Object getClassLoader(Class<?> c);
+ private static native Class<?>[] getClassLoaderClasses(ClassLoader cl);
+
private static class TestForNonInit {
public static double dummy = Math.random(); // So it can't be compile-time initialized.
}
@@ -188,4 +283,23 @@ public class Main {
}
public abstract static class ClassC implements InfA, InfC {
}
+
+ private static final String DEX1 = System.getenv("DEX_LOCATION") + "/912-classes.jar";
+ private static final String DEX2 = System.getenv("DEX_LOCATION") + "/912-classes-ex.jar";
+
+ private static ClassLoader create(ClassLoader parent, String... elements) throws Exception {
+ // Note: We use a PathClassLoader, as we do not care about code performance. We only load
+ // the classes, and they're empty.
+ Class<?> pathClassLoaderClass = Class.forName("dalvik.system.PathClassLoader");
+ Constructor<?> pathClassLoaderInit = pathClassLoaderClass.getConstructor(String.class,
+ ClassLoader.class);
+ String path = String.join(":", elements);
+ return (ClassLoader) pathClassLoaderInit.newInstance(path, parent);
+ }
+
+ private static class ClassNameComparator implements Comparator<Class<?>> {
+ public int compare(Class<?> c1, Class<?> c2) {
+ return c1.getName().compareTo(c2.getName());
+ }
+ }
}
generated by cgit v1.2.3-59-g8ed1b (git 2.39.0) at 2025-12-10 01:11:26 +0000