You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
111 lines
4.6 KiB
111 lines
4.6 KiB
// Copyright 2014, VIXL authors
|
|
// All rights reserved.
|
|
//
|
|
// Redistribution and use in source and binary forms, with or without
|
|
// modification, are permitted provided that the following conditions are met:
|
|
//
|
|
// * Redistributions of source code must retain the above copyright notice,
|
|
// this list of conditions and the following disclaimer.
|
|
// * Redistributions in binary form must reproduce the above copyright notice,
|
|
// this list of conditions and the following disclaimer in the documentation
|
|
// and/or other materials provided with the distribution.
|
|
// * Neither the name of ARM Limited nor the names of its contributors may be
|
|
// used to endorse or promote products derived from this software without
|
|
// specific prior written permission.
|
|
//
|
|
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS CONTRIBUTORS "AS IS" AND
|
|
// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
|
|
// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
|
|
// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
|
|
// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
|
|
// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
|
|
// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
|
|
// OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
|
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
|
|
#include <cstdlib>
|
|
#include <string>
|
|
|
|
#include "test-runner.h"
|
|
|
|
#include "aarch64/decoder-aarch64.h"
|
|
#include "aarch64/disasm-aarch64.h"
|
|
|
|
#define TEST(name) TEST_(AARCH64_FUZZ_##name)
|
|
|
|
|
|
namespace vixl {
|
|
namespace aarch64 {
|
|
|
|
static void FuzzHelper(std::string mode, int step_size, int offset, int shift) {
|
|
Decoder decoder;
|
|
PrintDisassembler disasm(stdout);
|
|
Instruction buffer[kInstructionSize];
|
|
|
|
if (mode == "disasm") {
|
|
decoder.AppendVisitor(&disasm);
|
|
} else {
|
|
VIXL_CHECK(mode == "decoder");
|
|
}
|
|
|
|
for (uint64_t i = offset << shift; i < (UINT64_C(1) << 32); i += step_size) {
|
|
buffer->SetInstructionBits(static_cast<uint32_t>(i));
|
|
decoder.Decode(buffer);
|
|
}
|
|
}
|
|
|
|
// Number of shards used to split fuzz tests. This value isn't used in the macro
|
|
// below, so if you change this, ensure more FUZZ_SHARD instances are
|
|
// instantiated.
|
|
static const int kShardCount = 16;
|
|
|
|
// Test approximately 1% of the instruction space for the decoder, and 0.2% for
|
|
// the disassembler. Multiply the step size by the number of shards issued.
|
|
static const int kDecoderStep = 100 * kShardCount + 1;
|
|
static const int kDisasmStep = 500 * kShardCount + 1;
|
|
|
|
// Shift the offset argument into the top-level opcode bits, which helps to
|
|
// spread the fuzz coverage across instruction classes.
|
|
static const int kOpFieldShift = 25;
|
|
|
|
#define FUZZ_SHARD(mode, step, i, shift) \
|
|
TEST(mode##_##i) { FuzzHelper(#mode, step, i, shift); }
|
|
|
|
FUZZ_SHARD(decoder, kDecoderStep, 0, kOpFieldShift)
|
|
FUZZ_SHARD(decoder, kDecoderStep, 1, kOpFieldShift)
|
|
FUZZ_SHARD(decoder, kDecoderStep, 2, kOpFieldShift)
|
|
FUZZ_SHARD(decoder, kDecoderStep, 3, kOpFieldShift)
|
|
FUZZ_SHARD(decoder, kDecoderStep, 4, kOpFieldShift)
|
|
FUZZ_SHARD(decoder, kDecoderStep, 5, kOpFieldShift)
|
|
FUZZ_SHARD(decoder, kDecoderStep, 6, kOpFieldShift)
|
|
FUZZ_SHARD(decoder, kDecoderStep, 7, kOpFieldShift)
|
|
FUZZ_SHARD(decoder, kDecoderStep, 8, kOpFieldShift)
|
|
FUZZ_SHARD(decoder, kDecoderStep, 9, kOpFieldShift)
|
|
FUZZ_SHARD(decoder, kDecoderStep, 10, kOpFieldShift)
|
|
FUZZ_SHARD(decoder, kDecoderStep, 11, kOpFieldShift)
|
|
FUZZ_SHARD(decoder, kDecoderStep, 12, kOpFieldShift)
|
|
FUZZ_SHARD(decoder, kDecoderStep, 13, kOpFieldShift)
|
|
FUZZ_SHARD(decoder, kDecoderStep, 14, kOpFieldShift)
|
|
FUZZ_SHARD(decoder, kDecoderStep, 15, kOpFieldShift)
|
|
|
|
FUZZ_SHARD(disasm, kDisasmStep, 0, kOpFieldShift)
|
|
FUZZ_SHARD(disasm, kDisasmStep, 1, kOpFieldShift)
|
|
FUZZ_SHARD(disasm, kDisasmStep, 2, kOpFieldShift)
|
|
FUZZ_SHARD(disasm, kDisasmStep, 3, kOpFieldShift)
|
|
FUZZ_SHARD(disasm, kDisasmStep, 4, kOpFieldShift)
|
|
FUZZ_SHARD(disasm, kDisasmStep, 5, kOpFieldShift)
|
|
FUZZ_SHARD(disasm, kDisasmStep, 6, kOpFieldShift)
|
|
FUZZ_SHARD(disasm, kDisasmStep, 7, kOpFieldShift)
|
|
FUZZ_SHARD(disasm, kDisasmStep, 8, kOpFieldShift)
|
|
FUZZ_SHARD(disasm, kDisasmStep, 9, kOpFieldShift)
|
|
FUZZ_SHARD(disasm, kDisasmStep, 10, kOpFieldShift)
|
|
FUZZ_SHARD(disasm, kDisasmStep, 11, kOpFieldShift)
|
|
FUZZ_SHARD(disasm, kDisasmStep, 12, kOpFieldShift)
|
|
FUZZ_SHARD(disasm, kDisasmStep, 13, kOpFieldShift)
|
|
FUZZ_SHARD(disasm, kDisasmStep, 14, kOpFieldShift)
|
|
FUZZ_SHARD(disasm, kDisasmStep, 15, kOpFieldShift)
|
|
|
|
} // namespace aarch64
|
|
} // namespace vixl
|