DdmConnection.cpp revision 92516c84ef2a167524007a0584fb26018b5cb9c4 
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
26
27void DdmConnection::start(const char* name) {
28    JavaVM* vm;
29    JNIEnv* env;
30
31    // start a VM
32    JavaVMInitArgs args;
33    JavaVMOption opt;
34
35    opt.optionString =
36        "-agentlib:jdwp=transport=dt_android_adb,suspend=n,server=y";
37
38    args.version = JNI_VERSION_1_4;
39    args.options = &opt;
40    args.nOptions = 1;
41    args.ignoreUnrecognized = JNI_FALSE;
42
43
44    void* libdvm_dso = dlopen("libdvm.so", RTLD_NOW);
45    ALOGE_IF(!libdvm_dso, "DdmConnection: %s", dlerror());
46
47    void* libandroid_runtime_dso = dlopen("libandroid_runtime.so", RTLD_NOW);
48    ALOGE_IF(!libandroid_runtime_dso, "DdmConnection: %s", dlerror());
49
50    if (!libdvm_dso || !libandroid_runtime_dso) {
51        goto error;
52    }
53
54    jint (*JNI_CreateJavaVM)(JavaVM** p_vm, JNIEnv** p_env, void* vm_args);
55    JNI_CreateJavaVM = (typeof JNI_CreateJavaVM)dlsym(libdvm_dso, "JNI_CreateJavaVM");
56    ALOGE_IF(!JNI_CreateJavaVM, "DdmConnection: %s", dlerror());
57
58    jint (*registerNatives)(JNIEnv* env, jclass clazz);
59    registerNatives = (typeof registerNatives)dlsym(libandroid_runtime_dso,
60        "Java_com_android_internal_util_WithFramework_registerNatives");
61    ALOGE_IF(!registerNatives, "DdmConnection: %s", dlerror());
62
63    if (!JNI_CreateJavaVM || !registerNatives) {
64        goto error;
65    }
66
67    if (JNI_CreateJavaVM(&vm, &env, &args) == 0) {
68        jclass startClass;
69        jmethodID startMeth;
70
71        // register native code
72        if (registerNatives(env, 0) == 0) {
73            // set our name by calling DdmHandleAppName.setAppName()
74            startClass = env->FindClass("android/ddm/DdmHandleAppName");
75            if (startClass) {
76                startMeth = env->GetStaticMethodID(startClass,
77                        "setAppName", "(Ljava/lang/String;)V");
78                if (startMeth) {
79                    jstring str = env->NewStringUTF(name);
80                    env->CallStaticVoidMethod(startClass, startMeth, str);
81                    env->DeleteLocalRef(str);
82                }
83            }
84
85            // initialize DDMS communication by calling
86            // DdmRegister.registerHandlers()
87            startClass = env->FindClass("android/ddm/DdmRegister");
88            if (startClass) {
89                startMeth = env->GetStaticMethodID(startClass,
90                        "registerHandlers", "()V");
91                if (startMeth) {
92                    env->CallStaticVoidMethod(startClass, startMeth);
93                }
94            }
95        }
96    }
97    return;
98
99error:
100    if (libandroid_runtime_dso) {
101        dlclose(libandroid_runtime_dso);
102    }
103    if (libdvm_dso) {
104        dlclose(libdvm_dso);
105    }
106}
107
108}; // namespace android
109