/*
* Copyright (C) 2018 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.
*/
extern "C" int getRandomNumber();
class B {
public:
virtual int getBiggerRandomNumber() {
// Call to the other library.
return getRandomNumber() * 2;
}
virtual ~B() {}
};
B b;
// nested macros to make it easy to define a large amount of read-only data
// which will require relocation.
#define B_16 &b, &b, &b, &b, &b, &b, &b, &b, &b, &b, &b, &b, &b, &b, &b, &b,
#define B_128 B_16 B_16 B_16 B_16 B_16 B_16 B_16 B_16
#define B_1024 B_128 B_128 B_128 B_128 B_128 B_128 B_128 B_128
extern "C" B* const lots_more_relro[] = {
B_1024 B_1024 B_1024 B_1024 B_1024 B_1024 B_1024 B_1024
};
extern "C" int getBiggerRandomNumber() {
// access the relro section (twice, in fact, once for the pointer, and once
// for the vtable of B) to check it's actually there.
return lots_more_relro[0]->getBiggerRandomNumber();
}