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 = (typeof JNI_CreateJavaVM)dlsym(libart_dso, "JNI_CreateJavaVM");
63    ALOGE_IF(!JNI_CreateJavaVM, "DdmConnection: %s", dlerror());
64
65    jint (*registerNatives)(JNIEnv* env, jclass clazz);
66    registerNatives = (typeof registerNatives)dlsym(libandroid_runtime_dso,
67        "Java_com_android_internal_util_WithFramework_registerNatives");
68    ALOGE_IF(!registerNatives, "DdmConnection: %s", dlerror());
69
70    if (!JNI_CreateJavaVM || !registerNatives) {
71        goto error;
72    }
73
74    if (JNI_CreateJavaVM(&vm, &env, &args) == 0) {
75        jclass startClass;
76        jmethodID startMeth;
77
78        // register native code
79        if (registerNatives(env, 0) == 0) {
80            // set our name by calling DdmHandleAppName.setAppName()
81            startClass = env->FindClass("android/ddm/DdmHandleAppName");
82            if (startClass) {
83                startMeth = env->GetStaticMethodID(startClass,
84                        "setAppName", "(Ljava/lang/String;I)V");
85                if (startMeth) {
86                    jstring str = env->NewStringUTF(name);
87                    env->CallStaticVoidMethod(startClass, startMeth, str, getuid());
88                    env->DeleteLocalRef(str);
89                }
90            }
91
92            // initialize DDMS communication by calling
93            // DdmRegister.registerHandlers()
94            startClass = env->FindClass("android/ddm/DdmRegister");
95            if (startClass) {
96                startMeth = env->GetStaticMethodID(startClass,
97                        "registerHandlers", "()V");
98                if (startMeth) {
99                    env->CallStaticVoidMethod(startClass, startMeth);
100                }
101            }
102        }
103    }
104    return;
105
106error:
107    if (libandroid_runtime_dso) {
108        dlclose(libandroid_runtime_dso);
109    }
110    if (libart_dso) {
111        dlclose(libart_dso);
112    }
113}
114
115}; // namespace android
116