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45 lines
1.4 KiB
45 lines
1.4 KiB
/* |
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* Copyright (C) 2018 The Android Open Source Project |
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* |
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* Licensed under the Apache License, Version 2.0 (the "License"); |
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* you may not use this file except in compliance with the License. |
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* You may obtain a copy of the License at |
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* |
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* http://www.apache.org/licenses/LICENSE-2.0 |
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* |
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* Unless required by applicable law or agreed to in writing, software |
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* distributed under the License is distributed on an "AS IS" BASIS, |
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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* See the License for the specific language governing permissions and |
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* limitations under the License. |
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*/ |
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extern "C" int getRandomNumber(); |
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class B { |
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public: |
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virtual int getBiggerRandomNumber() { |
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// Call to the other library. |
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return getRandomNumber() * 2; |
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} |
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virtual ~B() {} |
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}; |
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B b; |
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// nested macros to make it easy to define a large amount of read-only data |
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// which will require relocation. |
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#define B_16 &b, &b, &b, &b, &b, &b, &b, &b, &b, &b, &b, &b, &b, &b, &b, &b, |
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#define B_128 B_16 B_16 B_16 B_16 B_16 B_16 B_16 B_16 |
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#define B_1024 B_128 B_128 B_128 B_128 B_128 B_128 B_128 B_128 |
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extern "C" B* const lots_more_relro[] = { |
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B_1024 B_1024 B_1024 B_1024 B_1024 B_1024 B_1024 B_1024 |
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}; |
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extern "C" int getBiggerRandomNumber() { |
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// access the relro section (twice, in fact, once for the pointer, and once |
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// for the vtable of B) to check it's actually there. |
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return lots_more_relro[0]->getBiggerRandomNumber(); |
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}
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