derek.holloway
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50 lines
1.5 KiB
C++
50 lines
1.5 KiB
C++
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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// Simple test for a fuzzer. The fuzzer must find several narrow ranges.
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#include <cstdint>
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#include <cstdio>
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#include <cstdlib>
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#include <cstring>
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extern int AllLines[];
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bool PrintOnce(int Line) {
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if (!AllLines[Line])
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fprintf(stderr, "Seen line %d\n", Line);
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AllLines[Line] = 1;
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return true;
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}
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extern "C" int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) {
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if (Size != 21)
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return 0;
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uint64_t x = 0;
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int64_t y = 0;
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int32_t z = 0;
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uint8_t a = 0;
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memcpy(&x, Data, 8); // 8
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memcpy(&y, Data + 8, 8); // 16
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memcpy(&z, Data + 16, sizeof(z)); // 20
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memcpy(&a, Data + 20, sizeof(a)); // 21
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const bool k32bit = sizeof(void*) == 4;
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if ((k32bit || x > 1234567890) && PrintOnce(__LINE__) &&
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(k32bit || x < 1234567895) && PrintOnce(__LINE__) &&
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a == 0x42 && PrintOnce(__LINE__) &&
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(k32bit || y >= 987654321) && PrintOnce(__LINE__) &&
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(k32bit || y <= 987654325) && PrintOnce(__LINE__) &&
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z < -10000 && PrintOnce(__LINE__) &&
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z >= -10005 && PrintOnce(__LINE__) &&
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z != -10003 && PrintOnce(__LINE__) &&
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true) {
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fprintf(stderr, "BINGO; Found the target: size %zd (%zd, %zd, %d, %d), exiting.\n",
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Size, x, y, z, a);
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exit(1);
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}
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return 0;
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}
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int AllLines[__LINE__ + 1]; // Must be the last line.
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