1 /*
2 * Copyright (C) 2017 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 <dlfcn.h>
18 #include <inttypes.h>
19
20 #include <cstdio>
21 #include <memory>
22
23 #include "android-base/stringprintf.h"
24 #include "jni.h"
25 #include "jvmti.h"
26
27 // Test infrastructure
28 #include "jni_binder.h"
29 #include "jvmti_helper.h"
30 #include "scoped_local_ref.h"
31 #include "test_env.h"
32
33 namespace art {
34 namespace Test986NativeBind {
35
doUpPrintCall(JNIEnv * env,const char * function)36 static void doUpPrintCall(JNIEnv* env, const char* function) {
37 ScopedLocalRef<jclass> klass(env, env->FindClass("art/Test986"));
38 jmethodID targetMethod = env->GetStaticMethodID(klass.get(), function, "()V");
39 env->CallStaticVoidMethod(klass.get(), targetMethod);
40 }
41
Java_art_Test986_00024Transform_sayHi__(JNIEnv * env,jclass klass ATTRIBUTE_UNUSED)42 extern "C" JNIEXPORT void JNICALL Java_art_Test986_00024Transform_sayHi__(
43 JNIEnv* env, jclass klass ATTRIBUTE_UNUSED) {
44 doUpPrintCall(env, "doSayHi");
45 }
46
Java_art_Test986_00024Transform_sayHi2(JNIEnv * env,jclass klass ATTRIBUTE_UNUSED)47 extern "C" JNIEXPORT void JNICALL Java_art_Test986_00024Transform_sayHi2(
48 JNIEnv* env, jclass klass ATTRIBUTE_UNUSED) {
49 doUpPrintCall(env, "doSayHi2");
50 }
51
NoReallySayGoodbye(JNIEnv * env,jclass klass ATTRIBUTE_UNUSED)52 extern "C" JNIEXPORT void JNICALL NoReallySayGoodbye(JNIEnv* env, jclass klass ATTRIBUTE_UNUSED) {
53 doUpPrintCall(env, "doSayBye");
54 }
55
doJvmtiMethodBind(jvmtiEnv * jvmtienv ATTRIBUTE_UNUSED,JNIEnv * env,jthread thread ATTRIBUTE_UNUSED,jmethodID m,void * address,void ** out_address)56 static void doJvmtiMethodBind(jvmtiEnv* jvmtienv ATTRIBUTE_UNUSED,
57 JNIEnv* env,
58 jthread thread ATTRIBUTE_UNUSED,
59 jmethodID m,
60 void* address,
61 /*out*/void** out_address) {
62 ScopedLocalRef<jclass> method_class(env, env->FindClass("java/lang/reflect/Method"));
63 ScopedLocalRef<jobject> method_obj(env, env->ToReflectedMethod(method_class.get(), m, false));
64 Dl_info addr_info;
65 if (dladdr(address, &addr_info) == 0 || addr_info.dli_sname == nullptr) {
66 ScopedLocalRef<jclass> exception_class(env, env->FindClass("java/lang/Exception"));
67 env->ThrowNew(exception_class.get(), "dladdr failure!");
68 return;
69 }
70 ScopedLocalRef<jstring> sym_name(env, env->NewStringUTF(addr_info.dli_sname));
71 ScopedLocalRef<jclass> klass(env, env->FindClass("art/Test986"));
72 jmethodID upcallMethod = env->GetStaticMethodID(
73 klass.get(),
74 "doNativeMethodBind",
75 "(Ljava/lang/reflect/Method;Ljava/lang/String;)Ljava/lang/String;");
76 if (env->ExceptionCheck()) {
77 return;
78 }
79 ScopedLocalRef<jstring> new_symbol(env,
80 reinterpret_cast<jstring>(
81 env->CallStaticObjectMethod(klass.get(),
82 upcallMethod,
83 method_obj.get(),
84 sym_name.get())));
85 const char* new_symbol_chars = env->GetStringUTFChars(new_symbol.get(), nullptr);
86 if (strcmp(new_symbol_chars, addr_info.dli_sname) != 0) {
87 *out_address = dlsym(RTLD_DEFAULT, new_symbol_chars);
88 if (*out_address == nullptr) {
89 ScopedLocalRef<jclass> exception_class(env, env->FindClass("java/lang/Exception"));
90 env->ThrowNew(exception_class.get(), "dlsym failure!");
91 return;
92 }
93 }
94 env->ReleaseStringUTFChars(new_symbol.get(), new_symbol_chars);
95 }
96
Java_art_Test986_setupNativeBindNotify(JNIEnv * env ATTRIBUTE_UNUSED,jclass klass ATTRIBUTE_UNUSED)97 extern "C" JNIEXPORT void JNICALL Java_art_Test986_setupNativeBindNotify(
98 JNIEnv* env ATTRIBUTE_UNUSED, jclass klass ATTRIBUTE_UNUSED) {
99 jvmtiEventCallbacks cb;
100 memset(&cb, 0, sizeof(cb));
101 cb.NativeMethodBind = doJvmtiMethodBind;
102 jvmti_env->SetEventCallbacks(&cb, sizeof(cb));
103 }
104
Java_art_Test986_setNativeBindNotify(JNIEnv * env,jclass klass ATTRIBUTE_UNUSED,jboolean enable)105 extern "C" JNIEXPORT void JNICALL Java_art_Test986_setNativeBindNotify(
106 JNIEnv* env, jclass klass ATTRIBUTE_UNUSED, jboolean enable) {
107 jvmtiError res = jvmti_env->SetEventNotificationMode(enable ? JVMTI_ENABLE : JVMTI_DISABLE,
108 JVMTI_EVENT_NATIVE_METHOD_BIND,
109 nullptr);
110 if (res != JVMTI_ERROR_NONE) {
111 JvmtiErrorToException(env, jvmti_env, res);
112 }
113 }
114
Java_art_Test986_rebindTransformClass(JNIEnv * env,jclass klass ATTRIBUTE_UNUSED,jclass k)115 extern "C" JNIEXPORT void JNICALL Java_art_Test986_rebindTransformClass(
116 JNIEnv* env, jclass klass ATTRIBUTE_UNUSED, jclass k) {
117 JNINativeMethod m[2];
118 m[0].name = "sayHi";
119 m[0].signature = "()V";
120 m[0].fnPtr = reinterpret_cast<void*>(Java_art_Test986_00024Transform_sayHi__);
121 m[1].name = "sayHi2";
122 m[1].signature = "()V";
123 m[1].fnPtr = reinterpret_cast<void*>(Java_art_Test986_00024Transform_sayHi2);
124 env->RegisterNatives(k, m, 2);
125 }
126
127 } // namespace Test986NativeBind
128 } // namespace art
129