1/*
2 * Copyright (C) 2011 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
19#include <cutils/log.h>
20
21#include "jni.h"
22#include "DdmConnection.h"
23
24namespace android {
25
26void DdmConnection_start(const char* name) {
27    ALOGI("DdmConnection_start");
28    DdmConnection::start(name);
29}
30
31void DdmConnection::start(const char* name) {
32    JavaVM* vm;
33    JNIEnv* env;
34
35    // start a VM
36    JavaVMInitArgs args;
37    JavaVMOption opt;
38
39    opt.optionString =
40        "-agentlib:jdwp=transport=dt_android_adb,suspend=n,server=y";
41
42    args.version = JNI_VERSION_1_4;
43    args.options = &opt;
44    args.nOptions = 1;
45    args.ignoreUnrecognized = JNI_FALSE;
46
47
48    // TODO: Should this just link against libnativehelper and use its
49    // JNI_CreateJavaVM wrapper that essential does this dlopen/dlsym
50    // work based on the current system default runtime?
51    void* libart_dso = dlopen("libart.so", RTLD_NOW);
52    ALOGE_IF(!libart_dso, "DdmConnection: %s", dlerror());
53
54    void* libandroid_runtime_dso = dlopen("libandroid_runtime.so", RTLD_NOW);
55    ALOGE_IF(!libandroid_runtime_dso, "DdmConnection: %s", dlerror());
56
57    if (!libart_dso || !libandroid_runtime_dso) {
58        goto error;
59    }
60
61    jint (*JNI_CreateJavaVM)(JavaVM** p_vm, JNIEnv** p_env, void* vm_args);
62    JNI_CreateJavaVM = reinterpret_cast<decltype(JNI_CreateJavaVM)>(
63            dlsym(libart_dso, "JNI_CreateJavaVM"));
64    ALOGE_IF(!JNI_CreateJavaVM, "DdmConnection: %s", dlerror());
65
66    jint (*registerNatives)(JNIEnv* env, jclass clazz);
67    registerNatives = reinterpret_cast<decltype(registerNatives)>(
68            dlsym(libandroid_runtime_dso,
69                "Java_com_android_internal_util_WithFramework_registerNatives"));
70    ALOGE_IF(!registerNatives, "DdmConnection: %s", dlerror());
71
72    if (!JNI_CreateJavaVM || !registerNatives) {
73        goto error;
74    }
75
76    if (JNI_CreateJavaVM(&vm, &env, &args) == 0) {
77        jclass startClass;
78        jmethodID startMeth;
79
80        // register native code
81        if (registerNatives(env, 0) == 0) {
82            // set our name by calling DdmHandleAppName.setAppName()
83            startClass = env->FindClass("android/ddm/DdmHandleAppName");
84            if (startClass) {
85                startMeth = env->GetStaticMethodID(startClass,
86                        "setAppName", "(Ljava/lang/String;I)V");
87                if (startMeth) {
88                    jstring str = env->NewStringUTF(name);
89                    env->CallStaticVoidMethod(startClass, startMeth, str, getuid());
90                    env->DeleteLocalRef(str);
91                }
92            }
93
94            // initialize DDMS communication by calling
95            // DdmRegister.registerHandlers()
96            startClass = env->FindClass("android/ddm/DdmRegister");
97            if (startClass) {
98                startMeth = env->GetStaticMethodID(startClass,
99                        "registerHandlers", "()V");
100                if (startMeth) {
101                    env->CallStaticVoidMethod(startClass, startMeth);
102                }
103            }
104        }
105    }
106    return;
107
108error:
109    if (libandroid_runtime_dso) {
110        dlclose(libandroid_runtime_dso);
111    }
112    if (libart_dso) {
113        dlclose(libart_dso);
114    }
115}
116
117}; // namespace android
118