Move fuzzers to testing/fuzzers.

Move them out of testing/libfuzzer, to make it possible to pull
libfuzzer into that directory. Leave testing/libfuzzer/BUILD.gn there
for now as a transitional build file.

BUG=pdfium:1088

Change-Id: I4126d89dd3e075ac63477a4860e029c135866dbe
Reviewed-on: https://pdfium-review.googlesource.com/32896
Commit-Queue: Lei Zhang <thestig@chromium.org>
Reviewed-by: dsinclair <dsinclair@chromium.org>

1 files changed, 0 insertions, 58 deletions

diff --git a/testing/libfuzzer/pdf_lzw_fuzzer.cc b/testing/libfuzzer/pdf_lzw_fuzzer.cc
deleted file mode 100644
index 7e10d2a1ee..0000000000
--- a/testing/libfuzzer/pdf_lzw_fuzzer.cc
+++ /dev/null
@@ -1,58 +0,0 @@
-// Copyright 2017 The PDFium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include <vector>
-
-#include "core/fxcodec/gif/cfx_lzwdecompressor.h"
-#include "third_party/base/numerics/safe_conversions.h"
-
-// Between 2x and 5x is a standard range for LZW according to a quick
-// search of papers. Running up to 10x to catch any niche cases.
-constexpr uint32_t kMinCompressionRatio = 2;
-constexpr uint32_t kMaxCompressionRatio = 10;
-
-void LZWFuzz(const uint8_t* src_buf,
-             size_t src_size,
-             uint8_t color_exp,
-             uint8_t code_exp) {
-  std::unique_ptr<CFX_LZWDecompressor> decompressor =
-      CFX_LZWDecompressor::Create(color_exp, code_exp);
-  if (!decompressor)
-    return;
-
-  for (uint32_t compressions_ratio = kMinCompressionRatio;
-       compressions_ratio <= kMaxCompressionRatio; compressions_ratio++) {
-    std::vector<uint8_t> dest_buf(compressions_ratio * src_size);
-    // This cast should be safe since the caller is checking for overflow on
-    // the initial data.
-    uint32_t dest_size = static_cast<uint32_t>(dest_buf.size());
-    if (CFX_GifDecodeStatus::InsufficientDestSize !=
-        decompressor->Decode(const_cast<uint8_t*>(src_buf), src_size,
-                             dest_buf.data(), &dest_size))
-      return;
-  }
-}
-
-extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
-  // Need at least 3 bytes to do anything.
-  if (size < 3)
-    return 0;
-
-  // Normally the GIF would provide the code and color sizes, instead, going
-  // to assume they are the first two bytes of data provided.
-  uint8_t color_exp = data[0];
-  uint8_t code_exp = data[1];
-  const uint8_t* lzw_data = data + 2;
-  uint32_t lzw_data_size = static_cast<uint32_t>(size - 2);
-  // Check that there isn't going to be an overflow in the destination buffer
-  // size.
-  if (lzw_data_size >
-      std::numeric_limits<uint32_t>::max() / kMaxCompressionRatio) {
-    return 0;
-  }
-
-  LZWFuzz(lzw_data, lzw_data_size, color_exp, code_exp);
-
-  return 0;
-}