| 1 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 2 | // See https://llvm.org/LICENSE.txt for license information. |
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| 3 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 4 | |
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| 5 | // Tests that deadlocks do not occur when an OOM occurs during symbolization. |
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| 6 | |
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| 7 | #include <cassert> |
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| 8 | #include <cstdint> |
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| 9 | #include <cstdio> |
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| 10 | #include <cstdlib> |
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| 11 | #include <cstring> |
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| 12 | |
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| 13 | #include "Bingo.h" |
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| 14 | |
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| 15 | volatile unsigned Sink = 0; |
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| 16 | |
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| 17 | // Do not inline this function. We want to trigger NEW_FUNC symbolization when |
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| 18 | // libFuzzer finds this function. We use a macro to make the name as long |
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| 19 | // possible, hoping to increase the time spent in symbolization and increase the |
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| 20 | // chances of triggering a deadlock. |
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| 21 | __attribute__((noinline)) void BINGO() { |
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| 22 | // Busy work. Inserts a delay here so the deadlock is more likely to trigger. |
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| 23 | for (unsigned i = 0; i < 330000000; i++) Sink += i; |
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| 24 | } |
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| 25 | |
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| 26 | extern "C" int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) { |
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| 27 | assert(Data); |
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| 28 | if (Size < 3) return 0; |
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| 29 | if (Data[0] == 'F' && |
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| 30 | Data[1] == 'U' && |
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| 31 | Data[2] == 'Z') |
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| 32 | BINGO(); |
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| 33 | return 0; |
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| 34 | } |
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| 35 | |
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| 36 | |
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