ART: Add GetObjectSize and GetObjectHashCode
Add support for these two functions. Add tests.
Bug: 31684578
Test: m test-art-host-run-test-920-objects
Change-Id: If5dfb5aedddee47e5d739b0c56c7d264ba6e2d51
diff --git a/test/920-objects/build b/test/920-objects/build
new file mode 100755
index 0000000..898e2e5
--- /dev/null
+++ b/test/920-objects/build
@@ -0,0 +1,17 @@
+#!/bin/bash
+#
+# Copyright 2016 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.
+
+./default-build "$@" --experimental agents
diff --git a/test/920-objects/expected.txt b/test/920-objects/expected.txt
new file mode 100644
index 0000000..80feeb9
--- /dev/null
+++ b/test/920-objects/expected.txt
@@ -0,0 +1,10 @@
+class java.lang.Object 8
+class java.lang.Object 8
+class [I 12
+class [I 16
+class [I 20
+class [D 16
+class [D 24
+class [D 32
+class java.lang.String 24
+class java.lang.String 24
diff --git a/test/920-objects/info.txt b/test/920-objects/info.txt
new file mode 100644
index 0000000..875a5f6
--- /dev/null
+++ b/test/920-objects/info.txt
@@ -0,0 +1 @@
+Tests basic functions in the jvmti plugin.
diff --git a/test/920-objects/objects.cc b/test/920-objects/objects.cc
new file mode 100644
index 0000000..886dd0e
--- /dev/null
+++ b/test/920-objects/objects.cc
@@ -0,0 +1,77 @@
+/*
+ * Copyright (C) 2013 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 "objects.h"
+
+#include <stdio.h>
+
+#include "base/macros.h"
+#include "jni.h"
+#include "openjdkjvmti/jvmti.h"
+#include "ScopedLocalRef.h"
+
+#include "ti-agent/common_helper.h"
+#include "ti-agent/common_load.h"
+
+namespace art {
+namespace Test920Objects {
+
+extern "C" JNIEXPORT jlong JNICALL Java_Main_getObjectSize(
+ JNIEnv* env ATTRIBUTE_UNUSED, jclass klass ATTRIBUTE_UNUSED, jobject object) {
+ jlong size;
+
+ jvmtiError result = jvmti_env->GetObjectSize(object, &size);
+ if (result != JVMTI_ERROR_NONE) {
+ char* err;
+ jvmti_env->GetErrorName(result, &err);
+ printf("Failure running GetObjectSize: %s\n", err);
+ jvmti_env->Deallocate(reinterpret_cast<unsigned char*>(err));
+ return -1;
+ }
+
+ return size;
+}
+
+extern "C" JNIEXPORT jint JNICALL Java_Main_getObjectHashCode(
+ JNIEnv* env ATTRIBUTE_UNUSED, jclass klass ATTRIBUTE_UNUSED, jobject object) {
+ jint hash;
+
+ jvmtiError result = jvmti_env->GetObjectHashCode(object, &hash);
+ if (result != JVMTI_ERROR_NONE) {
+ char* err;
+ jvmti_env->GetErrorName(result, &err);
+ printf("Failure running GetObjectHashCode: %s\n", err);
+ jvmti_env->Deallocate(reinterpret_cast<unsigned char*>(err));
+ return -1;
+ }
+
+ return hash;
+}
+
+// Don't do anything
+jint OnLoad(JavaVM* vm,
+ char* options ATTRIBUTE_UNUSED,
+ void* reserved ATTRIBUTE_UNUSED) {
+ if (vm->GetEnv(reinterpret_cast<void**>(&jvmti_env), JVMTI_VERSION_1_0)) {
+ printf("Unable to get jvmti env!\n");
+ return 1;
+ }
+ SetAllCapabilities(jvmti_env);
+ return 0;
+}
+
+} // namespace Test920Objects
+} // namespace art
diff --git a/test/920-objects/objects.h b/test/920-objects/objects.h
new file mode 100644
index 0000000..5f21e7b
--- /dev/null
+++ b/test/920-objects/objects.h
@@ -0,0 +1,30 @@
+/*
+ * Copyright (C) 2016 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.
+ */
+
+#ifndef ART_TEST_920_OBJECTS_OBJECTS_H_
+#define ART_TEST_920_OBJECTS_OBJECTS_H_
+
+#include <jni.h>
+
+namespace art {
+namespace Test920Objects {
+
+jint OnLoad(JavaVM* vm, char* options, void* reserved);
+
+} // namespace Test920Objects
+} // namespace art
+
+#endif // ART_TEST_920_OBJECTS_OBJECTS_H_
diff --git a/test/920-objects/run b/test/920-objects/run
new file mode 100755
index 0000000..4379349
--- /dev/null
+++ b/test/920-objects/run
@@ -0,0 +1,19 @@
+#!/bin/bash
+#
+# Copyright 2016 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.
+
+./default-run "$@" --experimental agents \
+ --experimental runtime-plugins \
+ --jvmti
diff --git a/test/920-objects/src/Main.java b/test/920-objects/src/Main.java
new file mode 100644
index 0000000..5dbe1a7
--- /dev/null
+++ b/test/920-objects/src/Main.java
@@ -0,0 +1,98 @@
+/*
+ * Copyright (C) 2016 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.util.Arrays;
+
+public class Main {
+ public static void main(String[] args) throws Exception {
+ System.loadLibrary(args[1]);
+
+ doTest();
+ }
+
+ public static void doTest() throws Exception {
+ testObjectSize(new Object());
+ testObjectSize(new Object());
+
+ testObjectSize(new int[0]);
+ testObjectSize(new int[1]);
+ testObjectSize(new int[2]);
+
+ testObjectSize(new double[0]);
+ testObjectSize(new double[1]);
+ testObjectSize(new double[2]);
+
+ testObjectSize(new String("abc"));
+ testObjectSize(new String("wxyz"));
+
+ testObjectHash();
+ }
+
+ private static void testObjectSize(Object o) {
+ System.out.println(o.getClass() + " " + getObjectSize(o));
+ }
+
+ private static void testObjectHash() {
+ Object[] objects = new Object[] {
+ new Object(),
+ new Object(),
+
+ new MyHash(1),
+ new MyHash(1),
+ new MyHash(2)
+ };
+
+ int hashes[] = new int[objects.length];
+
+ for (int i = 0; i < objects.length; i++) {
+ hashes[i] = getObjectHashCode(objects[i]);
+ }
+
+ // Implementation detail: we use the identity hashcode, for simplicity.
+ for (int i = 0; i < objects.length; i++) {
+ int ihash = System.identityHashCode(objects[i]);
+ if (hashes[i] != ihash) {
+ throw new RuntimeException(objects[i] + ": " + hashes[i] + " vs " + ihash);
+ }
+ }
+
+ Runtime.getRuntime().gc();
+ Runtime.getRuntime().gc();
+
+ for (int i = 0; i < objects.length; i++) {
+ int newhash = getObjectHashCode(objects[i]);
+ if (hashes[i] != newhash) {
+ throw new RuntimeException(objects[i] + ": " + hashes[i] + " vs " + newhash);
+ }
+ }
+ }
+
+ private static native long getObjectSize(Object o);
+ private static native int getObjectHashCode(Object o);
+
+ private static class MyHash {
+ private int hash;
+
+ public MyHash(int h) {
+ hash = h;
+ }
+
+ public int hashCode() {
+ return hash;
+ }
+ }
+}