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 <stdio.h>
18
19 #include "android-base/macros.h"
20 #include "jni.h"
21 #include "jvmti.h"
22 #include "scoped_local_ref.h"
23
24 // Test infrastructure
25 #include "jni_helper.h"
26 #include "test_env.h"
27
28 namespace art {
29 namespace Test918Fields {
30
Java_art_Test918_getFieldName(JNIEnv * env,jclass klass,jobject field)31 extern "C" JNIEXPORT jobjectArray JNICALL Java_art_Test918_getFieldName(
32 JNIEnv* env, jclass klass, jobject field) {
33 jfieldID id = env->FromReflectedField(field);
34
35 char* name;
36 char* sig;
37 char* gen;
38 // Note: technically putting the caller class here is wrong, but we don't need it, anyways.
39 jvmtiError result = jvmti_env->GetFieldName(klass, id, &name, &sig, &gen);
40 if (result != JVMTI_ERROR_NONE) {
41 char* err;
42 jvmti_env->GetErrorName(result, &err);
43 printf("Failure running GetFieldName: %s\n", err);
44 jvmti_env->Deallocate(reinterpret_cast<unsigned char*>(err));
45 return nullptr;
46 }
47
48 auto callback = [&](jint i) {
49 if (i == 0) {
50 return name == nullptr ? nullptr : env->NewStringUTF(name);
51 } else if (i == 1) {
52 return sig == nullptr ? nullptr : env->NewStringUTF(sig);
53 } else {
54 return gen == nullptr ? nullptr : env->NewStringUTF(gen);
55 }
56 };
57 jobjectArray ret = CreateObjectArray(env, 3, "java/lang/String", callback);
58
59 // Need to deallocate the strings.
60 if (name != nullptr) {
61 jvmti_env->Deallocate(reinterpret_cast<unsigned char*>(name));
62 }
63 if (sig != nullptr) {
64 jvmti_env->Deallocate(reinterpret_cast<unsigned char*>(sig));
65 }
66 if (gen != nullptr) {
67 jvmti_env->Deallocate(reinterpret_cast<unsigned char*>(gen));
68 }
69
70 // Also run GetMethodName with all parameter pointers null to check for segfaults.
71 jvmtiError result2 = jvmti_env->GetFieldName(klass, id, nullptr, nullptr, nullptr);
72 if (result2 != JVMTI_ERROR_NONE) {
73 char* err;
74 jvmti_env->GetErrorName(result2, &err);
75 printf("Failure running GetFieldName(null, null, null): %s\n", err);
76 jvmti_env->Deallocate(reinterpret_cast<unsigned char*>(err));
77 return nullptr;
78 }
79
80 return ret;
81 }
82
Java_art_Test918_getFieldDeclaringClass(JNIEnv * env,jclass klass,jobject field)83 extern "C" JNIEXPORT jclass JNICALL Java_art_Test918_getFieldDeclaringClass(
84 JNIEnv* env, jclass klass, jobject field) {
85 jfieldID id = env->FromReflectedField(field);
86
87 jclass declaring_class;
88 jvmtiError result = jvmti_env->GetFieldDeclaringClass(klass, id, &declaring_class);
89 if (result != JVMTI_ERROR_NONE) {
90 char* err;
91 jvmti_env->GetErrorName(result, &err);
92 printf("Failure running GetFieldDeclaringClass: %s\n", err);
93 jvmti_env->Deallocate(reinterpret_cast<unsigned char*>(err));
94 return nullptr;
95 }
96
97 return declaring_class;
98 }
99
Java_art_Test918_getFieldModifiers(JNIEnv * env,jclass klass,jobject field)100 extern "C" JNIEXPORT jint JNICALL Java_art_Test918_getFieldModifiers(
101 JNIEnv* env, jclass klass, jobject field) {
102 jfieldID id = env->FromReflectedField(field);
103
104 jint modifiers;
105 jvmtiError result = jvmti_env->GetFieldModifiers(klass, id, &modifiers);
106 if (result != JVMTI_ERROR_NONE) {
107 char* err;
108 jvmti_env->GetErrorName(result, &err);
109 printf("Failure running GetFieldModifiers: %s\n", err);
110 jvmti_env->Deallocate(reinterpret_cast<unsigned char*>(err));
111 return 0;
112 }
113
114 return modifiers;
115 }
116
Java_art_Test918_isFieldSynthetic(JNIEnv * env,jclass klass,jobject field)117 extern "C" JNIEXPORT jboolean JNICALL Java_art_Test918_isFieldSynthetic(
118 JNIEnv* env, jclass klass, jobject field) {
119 jfieldID id = env->FromReflectedField(field);
120
121 jboolean synth;
122 jvmtiError result = jvmti_env->IsFieldSynthetic(klass, id, &synth);
123 if (result != JVMTI_ERROR_NONE) {
124 char* err;
125 jvmti_env->GetErrorName(result, &err);
126 printf("Failure running IsFieldSynthetic: %s\n", err);
127 jvmti_env->Deallocate(reinterpret_cast<unsigned char*>(err));
128 return 0;
129 }
130
131 return synth;
132 }
133
134 } // namespace Test918Fields
135 } // namespace art
136