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Commit c8a33f16 authored by Yifan Hong's avatar Yifan Hong
Browse files

AndroidRuntime: Expose GetJavaVM 

Add a new header library, libandroid_runtime_vm_headers,
that exposes AndroidRuntimeGetJavaVM.

Test: boots
Bug: 190450693
Change-Id: I64053b56eb1290cff8ea191b1cc592fbc9702ce8
parent 483a604f

core/jni/Android.bp

+27 −0
Original line number Diff line number Diff line
@@ -297,6 +297,7 @@ cc_library_shared { 
            header_libs: [

                "bionic_libc_platform_headers",

                "dnsproxyd_protocol_headers",

                "libandroid_runtime_vm_headers",

            ],

        },

        host: {
@@ -338,3 +339,29 @@ cc_library_shared { 
        never: true,

    },

}



cc_library_headers {

    name: "libandroid_runtime_vm_headers",

    host_supported: true,

    vendor_available: true,

    // TODO(b/153609531): remove when libbinder is not native_bridge_supported

    native_bridge_supported: true,

    // Allow only modules from the following list to create threads that can be

    // attached to the JVM. This list should be a subset of the dependencies of

    // libandroid_runtime.

    visibility: [

        "//frameworks/native/libs/binder",

    ],

    export_include_dirs: ["include_vm"],

    header_libs: [

        "jni_headers",

    ],

    export_header_lib_headers: [

        "jni_headers",

    ],

    apex_available: [

        "//apex_available:platform",

        "com.android.media",

        "com.android.media.swcodec",

    ],

}

core/jni/AndroidRuntime.cpp

+5 −0
Original line number Diff line number Diff line
@@ -22,6 +22,7 @@ 
#include <android-base/properties.h>

#include <android/graphics/jni_runtime.h>

#include <android_runtime/AndroidRuntime.h>

#include <android_runtime/vm.h>

#include <assert.h>

#include <binder/IBinder.h>

#include <binder/IPCThreadState.h>
@@ -1322,6 +1323,10 @@ void AndroidRuntime::onVmCreated(JNIEnv* env) 
    return AndroidRuntime::mJavaVM;

}



extern "C" JavaVM* AndroidRuntimeGetJavaVM() {

    return AndroidRuntime::getJavaVM();

}



/*

 * Get the JNIEnv pointer for this thread.

 *

core/jni/include_vm/android_runtime/vm.h

0 → 100644
+24 −0
Original line number Diff line number Diff line 
/*

 * Copyright (C) 2021 The Android Open Source Project

 *

 * Licensed under the Apache License, Version 2.0 (the "License");

 * you may not use this file except in compliance with the License.

 * You may obtain a copy of the License at

 *

 *      http://www.apache.org/licenses/LICENSE-2.0

 *

 * Unless required by applicable law or agreed to in writing, software

 * distributed under the License is distributed on an "AS IS" BASIS,

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 * See the License for the specific language governing permissions and

 * limitations under the License.

 */



#pragma once



#include <jni.h>



// Get the Java VM. If the symbol doesn't exist at runtime, it means libandroid_runtime

// is not loaded in the current process. If the symbol exists but it returns nullptr, it

// means JavaVM is not yet started.

extern "C" JavaVM* AndroidRuntimeGetJavaVM();