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annotate contrib/fuzz/fuzzutil.cc @ 39085:dbb3e9e44fce
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author | Boris Feld <boris.feld@octobus.net> |
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date | Fri, 27 Jul 2018 14:37:31 +0200 |
parents | a1c0873a9990 |
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1 #include "fuzzutil.h" |
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2 |
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3 #include <cstring> |
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4 #include <utility> |
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5 |
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6 contrib::optional<two_inputs> SplitInputs(const uint8_t *Data, size_t Size) |
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7 { |
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8 if (!Size) { |
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9 return contrib::nullopt; |
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10 } |
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11 // figure out a random point in [0, Size] to split our input. |
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12 size_t left_size = (Data[0] / 255.0) * (Size - 1); |
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13 |
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14 // Copy inputs to new allocations so if bdiff over-reads |
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15 // AddressSanitizer can detect it. |
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16 std::unique_ptr<char[]> left(new char[left_size]); |
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17 std::memcpy(left.get(), Data + 1, left_size); |
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18 // right starts at the next byte after left ends |
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19 size_t right_size = Size - (left_size + 1); |
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20 std::unique_ptr<char[]> right(new char[right_size]); |
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21 std::memcpy(right.get(), Data + 1 + left_size, right_size); |
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22 LOG(2) << "inputs are " << left_size << " and " << right_size |
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23 << " bytes" << std::endl; |
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24 two_inputs result = {std::move(right), right_size, std::move(left), |
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25 left_size}; |
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26 return result; |
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27 } |