1 /*
2 * Copyright (C) 2013 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #include <pthread.h>
18
19 #include <cstdio>
20 #include <iostream>
21 #include <vector>
22
23 #include "android-base/logging.h"
24 #include "jni.h"
25 #include "jvmti.h"
26 #include "scoped_local_ref.h"
27 #include "scoped_primitive_array.h"
28
29 // Test infrastructure
30 #include "jvmti_helper.h"
31 #include "test_env.h"
32
33 namespace art {
34 namespace Test903HelloTagging {
35
Java_art_Test903_getTaggedObjects(JNIEnv * env,jclass,jlongArray searchTags,jboolean returnObjects,jboolean returnTags)36 extern "C" JNIEXPORT jobjectArray JNICALL Java_art_Test903_getTaggedObjects(
37 JNIEnv* env, jclass, jlongArray searchTags, jboolean returnObjects, jboolean returnTags) {
38 ScopedLongArrayRO scoped_array(env);
39 if (searchTags != nullptr) {
40 scoped_array.reset(searchTags);
41 }
42 const jlong* tag_ptr = scoped_array.get();
43 if (tag_ptr == nullptr) {
44 // Can never pass null.
45 tag_ptr = reinterpret_cast<const jlong*>(1);
46 }
47
48 jint result_count;
49 jobject* result_object_array;
50 jobject** result_object_array_ptr = returnObjects == JNI_TRUE ? &result_object_array : nullptr;
51 jlong* result_tag_array;
52 jlong** result_tag_array_ptr = returnTags == JNI_TRUE ? &result_tag_array : nullptr;
53
54 jvmtiError ret = jvmti_env->GetObjectsWithTags(scoped_array.size(),
55 tag_ptr,
56 &result_count,
57 result_object_array_ptr,
58 result_tag_array_ptr);
59 if (JvmtiErrorToException(env, jvmti_env, ret)) {
60 return nullptr;
61 }
62
63 CHECK_GE(result_count, 0);
64
65 ScopedLocalRef<jclass> obj_class(env, env->FindClass("java/lang/Object"));
66 if (obj_class.get() == nullptr) {
67 return nullptr;
68 }
69
70 jobjectArray resultObjectArray = nullptr;
71 if (returnObjects == JNI_TRUE) {
72 resultObjectArray = env->NewObjectArray(result_count, obj_class.get(), nullptr);
73 if (resultObjectArray == nullptr) {
74 return nullptr;
75 }
76 for (jint i = 0; i < result_count; ++i) {
77 env->SetObjectArrayElement(resultObjectArray, i, result_object_array[i]);
78 }
79 }
80
81 jlongArray resultTagArray = nullptr;
82 if (returnTags == JNI_TRUE) {
83 resultTagArray = env->NewLongArray(result_count);
84 env->SetLongArrayRegion(resultTagArray, 0, result_count, result_tag_array);
85 }
86
87 jobject count_integer;
88 {
89 ScopedLocalRef<jclass> integer_class(env, env->FindClass("java/lang/Integer"));
90 jmethodID methodID = env->GetMethodID(integer_class.get(), "<init>", "(I)V");
91 count_integer = env->NewObject(integer_class.get(), methodID, result_count);
92 if (count_integer == nullptr) {
93 return nullptr;
94 }
95 }
96
97 jobjectArray resultArray = env->NewObjectArray(3, obj_class.get(), nullptr);
98 if (resultArray == nullptr) {
99 return nullptr;
100 }
101 env->SetObjectArrayElement(resultArray, 0, resultObjectArray);
102 env->SetObjectArrayElement(resultArray, 1, resultTagArray);
103 env->SetObjectArrayElement(resultArray, 2, count_integer);
104
105 return resultArray;
106 }
107
CreateJvmtiEnv(JNIEnv * env)108 static jvmtiEnv* CreateJvmtiEnv(JNIEnv* env) {
109 JavaVM* jvm;
110 CHECK_EQ(0, env->GetJavaVM(&jvm));
111
112 jvmtiEnv* new_jvmti_env;
113 CHECK_EQ(0, jvm->GetEnv(reinterpret_cast<void**>(&new_jvmti_env), JVMTI_VERSION_1_0));
114
115 jvmtiCapabilities capa;
116 memset(&capa, 0, sizeof(jvmtiCapabilities));
117 capa.can_tag_objects = 1;
118 jvmtiError error = new_jvmti_env->AddCapabilities(&capa);
119 CHECK_EQ(JVMTI_ERROR_NONE, error);
120
121 return new_jvmti_env;
122 }
123
SetTag(jvmtiEnv * env,jobject obj,jlong tag)124 static void SetTag(jvmtiEnv* env, jobject obj, jlong tag) {
125 jvmtiError ret = env->SetTag(obj, tag);
126 CHECK_EQ(JVMTI_ERROR_NONE, ret);
127 }
128
GetTag(jvmtiEnv * env,jobject obj)129 static jlong GetTag(jvmtiEnv* env, jobject obj) {
130 jlong tag;
131 jvmtiError ret = env->GetTag(obj, &tag);
132 CHECK_EQ(JVMTI_ERROR_NONE, ret);
133 return tag;
134 }
135
Java_art_Test903_testTagsInDifferentEnvs(JNIEnv * env,jclass klass ATTRIBUTE_UNUSED,jobject obj,jlong base_tag,jint count)136 extern "C" JNIEXPORT jlongArray JNICALL Java_art_Test903_testTagsInDifferentEnvs(
137 JNIEnv* env, jclass klass ATTRIBUTE_UNUSED, jobject obj, jlong base_tag, jint count) {
138 std::unique_ptr<jvmtiEnv*[]> envs = std::unique_ptr<jvmtiEnv*[]>(new jvmtiEnv*[count]);
139 envs[0] = jvmti_env;
140 for (int32_t i = 1; i != count; ++i) {
141 envs[i] = CreateJvmtiEnv(env);
142 }
143
144 for (int32_t i = 0; i != count; ++i) {
145 SetTag(envs[i], obj, base_tag + i);
146 }
147 std::unique_ptr<jlong[]> vals = std::unique_ptr<jlong[]>(new jlong[count]);
148 for (int32_t i = 0; i != count; ++i) {
149 vals[i] = GetTag(envs[i], obj);
150 }
151
152 for (int32_t i = 1; i != count; ++i) {
153 CHECK_EQ(JVMTI_ERROR_NONE, envs[i]->DisposeEnvironment());
154 }
155
156 jlongArray res = env->NewLongArray(count);
157 if (res == nullptr) {
158 return nullptr;
159 }
160 env->SetLongArrayRegion(res, 0, count, vals.get());
161 return res;
162 }
163
164 } // namespace Test903HelloTagging
165 } // namespace art
166