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>

28 files changed, 1076 insertions, 0 deletions

diff --git a/testing/fuzzers/BUILD.gn b/testing/fuzzers/BUILD.gn
new file mode 100644
index 0000000000..59211b1758
--- /dev/null
+++ b/testing/fuzzers/BUILD.gn
@@ -0,0 +1,253 @@
+# Copyright 2016 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.
+
+import("../../pdfium.gni")
+
+config("fuzzer_config") {
+  configs = [ "../..:pdfium_core_config" ]
+
+  defines = [
+    "PNG_PREFIX",
+    "PNG_USE_READ_MACROS",
+  ]
+  include_dirs = [ "../.." ]
+  if (pdf_enable_v8) {
+    defines += [ "PDF_ENABLE_V8" ]
+  }
+  if (pdf_enable_xfa) {
+    defines += [ "PDF_ENABLE_XFA" ]
+  }
+}
+
+group("fuzzers") {
+  testonly = true
+  deps = [
+    ":pdf_cmap_fuzzer_src",
+    ":pdf_codec_a85_fuzzer_src",
+    ":pdf_codec_fax_fuzzer_src",
+    ":pdf_codec_icc_fuzzer_src",
+    ":pdf_codec_jbig2_fuzzer_src",
+    ":pdf_codec_rle_fuzzer_src",
+    ":pdf_font_fuzzer_src",
+    ":pdf_hint_table_fuzzer_src",
+    ":pdf_jpx_fuzzer_src",
+    ":pdf_psengine_fuzzer_src",
+    ":pdf_streamparser_fuzzer_src",
+    ":pdf_xml_fuzzer_src",
+  ]
+  if (pdf_enable_xfa) {
+    deps += [
+      ":pdf_bidi_fuzzer_src",
+      ":pdf_cfx_barcode_fuzzer_src",
+      ":pdf_codec_jpeg_fuzzer_src",
+      ":pdf_css_fuzzer_src",
+      ":pdf_fm2js_fuzzer_src",
+      ":pdf_formcalc_fuzzer_src",
+    ]
+    if (pdf_enable_xfa_bmp) {
+      deps += [ ":pdf_codec_bmp_fuzzer_src" ]
+    }
+    if (pdf_enable_xfa_gif) {
+      deps += [
+        ":pdf_codec_gif_fuzzer_src",
+        ":pdf_lzw_fuzzer_src",
+      ]
+    }
+    if (pdf_enable_xfa_png) {
+      deps += [ ":pdf_codec_png_fuzzer_src" ]
+    }
+    if (pdf_enable_xfa_tiff) {
+      deps += [ ":pdf_codec_tiff_fuzzer_src" ]
+    }
+  }
+}
+
+template("pdfium_fuzzer") {
+  source_set(target_name) {
+    sources = invoker.sources + [ "pdf_fuzzer_init.cc" ]
+    deps = [
+      "../..:pdfium",
+    ]
+    if (defined(invoker.deps)) {
+      deps += invoker.deps
+    }
+    testonly = true
+    configs -= [ "//build/config/compiler:chromium_code" ]
+    configs += [
+      "//build/config/compiler:no_chromium_code",
+      ":fuzzer_config",
+    ]
+  }
+}
+
+if (pdf_enable_xfa) {
+  pdfium_fuzzer("pdf_bidi_fuzzer_src") {
+    sources = [
+      "pdf_bidi_fuzzer.cc",
+    ]
+  }
+
+  pdfium_fuzzer("pdf_cfx_barcode_fuzzer_src") {
+    sources = [
+      "pdf_cfx_barcode_fuzzer.cc",
+    ]
+  }
+
+  if (pdf_enable_xfa_bmp) {
+    pdfium_fuzzer("pdf_codec_bmp_fuzzer_src") {
+      sources = [
+        "pdf_codec_bmp_fuzzer.cc",
+        "xfa_codec_fuzzer.h",
+      ]
+      deps = [
+        "../../:test_support",
+      ]
+    }
+  }
+
+  if (pdf_enable_xfa_gif) {
+    pdfium_fuzzer("pdf_codec_gif_fuzzer_src") {
+      sources = [
+        "pdf_codec_gif_fuzzer.cc",
+        "xfa_codec_fuzzer.h",
+      ]
+      deps = [
+        "../../:test_support",
+      ]
+    }
+
+    pdfium_fuzzer("pdf_lzw_fuzzer_src") {
+      sources = [
+        "pdf_lzw_fuzzer.cc",
+      ]
+    }
+  }
+
+  pdfium_fuzzer("pdf_codec_jpeg_fuzzer_src") {
+    sources = [
+      "pdf_codec_jpeg_fuzzer.cc",
+      "xfa_codec_fuzzer.h",
+    ]
+    deps = [
+      "../../:test_support",
+    ]
+  }
+
+  if (pdf_enable_xfa_png) {
+    pdfium_fuzzer("pdf_codec_png_fuzzer_src") {
+      sources = [
+        "pdf_codec_png_fuzzer.cc",
+        "xfa_codec_fuzzer.h",
+      ]
+      deps = [
+        "../../:test_support",
+      ]
+    }
+  }
+
+  if (pdf_enable_xfa_tiff) {
+    pdfium_fuzzer("pdf_codec_tiff_fuzzer_src") {
+      sources = [
+        "pdf_codec_tiff_fuzzer.cc",
+        "xfa_codec_fuzzer.h",
+      ]
+      deps = [
+        "../../:test_support",
+      ]
+    }
+  }
+
+  pdfium_fuzzer("pdf_css_fuzzer_src") {
+    sources = [
+      "pdf_css_fuzzer.cc",
+    ]
+  }
+
+  pdfium_fuzzer("pdf_fm2js_fuzzer_src") {
+    sources = [
+      "pdf_fm2js_fuzzer.cc",
+    ]
+  }
+
+  pdfium_fuzzer("pdf_formcalc_fuzzer_src") {
+    sources = [
+      "pdf_formcalc_fuzzer.cc",
+    ]
+  }
+}
+
+pdfium_fuzzer("pdf_cmap_fuzzer_src") {
+  sources = [
+    "pdf_cmap_fuzzer.cc",
+  ]
+}
+
+pdfium_fuzzer("pdf_codec_a85_fuzzer_src") {
+  sources = [
+    "pdf_codec_a85_fuzzer.cc",
+  ]
+}
+
+pdfium_fuzzer("pdf_codec_fax_fuzzer_src") {
+  sources = [
+    "pdf_codec_fax_fuzzer.cc",
+  ]
+}
+
+pdfium_fuzzer("pdf_codec_icc_fuzzer_src") {
+  deps = [
+    "../../third_party/:lcms2",
+  ]
+  sources = [
+    "pdf_codec_icc_fuzzer.cc",
+  ]
+}
+
+pdfium_fuzzer("pdf_codec_jbig2_fuzzer_src") {
+  sources = [
+    "pdf_codec_jbig2_fuzzer.cc",
+  ]
+}
+
+pdfium_fuzzer("pdf_codec_rle_fuzzer_src") {
+  sources = [
+    "pdf_codec_rle_fuzzer.cc",
+  ]
+}
+
+pdfium_fuzzer("pdf_font_fuzzer_src") {
+  sources = [
+    "pdf_font_fuzzer.cc",
+  ]
+}
+
+pdfium_fuzzer("pdf_hint_table_fuzzer_src") {
+  sources = [
+    "pdf_hint_table_fuzzer.cc",
+  ]
+}
+
+pdfium_fuzzer("pdf_jpx_fuzzer_src") {
+  sources = [
+    "pdf_jpx_fuzzer.cc",
+  ]
+}
+
+pdfium_fuzzer("pdf_psengine_fuzzer_src") {
+  sources = [
+    "pdf_psengine_fuzzer.cc",
+  ]
+}
+
+pdfium_fuzzer("pdf_streamparser_fuzzer_src") {
+  sources = [
+    "pdf_streamparser_fuzzer.cc",
+  ]
+}
+
+pdfium_fuzzer("pdf_xml_fuzzer_src") {
+  sources = [
+    "pdf_xml_fuzzer.cc",
+  ]
+}
diff --git a/testing/fuzzers/DEPS b/testing/fuzzers/DEPS
new file mode 100644
index 0000000000..b1d034ed8c
--- /dev/null
+++ b/testing/fuzzers/DEPS
@@ -0,0 +1,3 @@
+include_rules = [
+  '+xfa',
+]
diff --git a/testing/fuzzers/pdf_bidi_fuzzer.cc b/testing/fuzzers/pdf_bidi_fuzzer.cc
new file mode 100644
index 0000000000..8e52688a10
--- /dev/null
+++ b/testing/fuzzers/pdf_bidi_fuzzer.cc
@@ -0,0 +1,36 @@
+// Copyright 2018 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 <cstdint>
+
+#include "core/fxcrt/fx_bidi.h"
+#include "core/fxcrt/widestring.h"
+#include "core/fxge/cfx_font.h"
+#include "third_party/base/span.h"
+#include "xfa/fgas/font/cfgas_fontmgr.h"
+#include "xfa/fgas/font/cfgas_gefont.h"
+#include "xfa/fgas/layout/cfx_rtfbreak.h"
+
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
+  auto fontmgr = pdfium::MakeUnique<CFGAS_FontMgr>();
+
+  auto font = pdfium::MakeUnique<CFX_Font>();
+  font->LoadSubst("Arial", true, 0, FXFONT_FW_NORMAL, 0, 0, 0);
+  assert(font);
+
+  CFX_RTFBreak rtf_break(FX_LAYOUTSTYLE_ExpandTab);
+  rtf_break.SetLineBreakTolerance(1);
+  rtf_break.SetFont(CFGAS_GEFont::LoadFont(std::move(font), fontmgr.get()));
+  rtf_break.SetFontSize(12);
+
+  WideString input =
+      WideString::FromUTF16LE(reinterpret_cast<const unsigned short*>(data),
+                              size / sizeof(unsigned short));
+  for (auto& ch : input)
+    rtf_break.AppendChar(ch);
+
+  auto chars = rtf_break.GetCurrentLineForTesting()->m_LineChars;
+  FX_BidiLine(&chars, chars.size());
+  return 0;
+}
diff --git a/testing/fuzzers/pdf_cfx_barcode_fuzzer.cc b/testing/fuzzers/pdf_cfx_barcode_fuzzer.cc
new file mode 100644
index 0000000000..aaeebf3ace
--- /dev/null
+++ b/testing/fuzzers/pdf_cfx_barcode_fuzzer.cc
@@ -0,0 +1,38 @@
+// 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 <memory>
+
+#include "core/fxcrt/fx_string.h"
+#include "xfa/fwl/cfx_barcode.h"
+
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
+  if (size < 2 * sizeof(wchar_t))
+    return 0;
+
+  BC_TYPE type = static_cast<BC_TYPE>(data[0] % (BC_DATAMATRIX + 1));
+
+  // Only used one byte, but align with wchar_t for string below.
+  data += sizeof(wchar_t);
+  size -= sizeof(wchar_t);
+
+  auto barcode = CFX_Barcode::Create(type);
+  if (!barcode)
+    return 0;
+
+  // TODO(tsepez): Setup more options from |data|.
+  barcode->SetModuleHeight(300);
+  barcode->SetModuleWidth(420);
+  barcode->SetHeight(298);
+  barcode->SetWidth(418);
+
+  WideStringView content(reinterpret_cast<const wchar_t*>(data),
+                         size / sizeof(wchar_t));
+
+  if (!barcode->Encode(content))
+    return 0;
+
+  // TODO(tsepez): Output to device.
+  return 0;
+}
diff --git a/testing/fuzzers/pdf_cmap_fuzzer.cc b/testing/fuzzers/pdf_cmap_fuzzer.cc
new file mode 100644
index 0000000000..0c0ff11f36
--- /dev/null
+++ b/testing/fuzzers/pdf_cmap_fuzzer.cc
@@ -0,0 +1,14 @@
+// Copyright 2016 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 <cstdint>
+
+#include "core/fpdfapi/font/cpdf_cmap.h"
+#include "third_party/base/ptr_util.h"
+#include "third_party/base/span.h"
+
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
+  pdfium::MakeRetain<CPDF_CMap>()->LoadEmbedded(pdfium::make_span(data, size));
+  return 0;
+}
diff --git a/testing/fuzzers/pdf_codec_a85_fuzzer.cc b/testing/fuzzers/pdf_codec_a85_fuzzer.cc
new file mode 100644
index 0000000000..20bd792886
--- /dev/null
+++ b/testing/fuzzers/pdf_codec_a85_fuzzer.cc
@@ -0,0 +1,18 @@
+// 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 <cstdint>
+#include <memory>
+
+#include "core/fxcodec/codec/ccodec_basicmodule.h"
+#include "core/fxcrt/fx_memory.h"
+
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
+  uint8_t* dest_buf = nullptr;
+  uint32_t dest_size = 0;
+  CCodec_BasicModule encoder_module;
+  encoder_module.A85Encode(data, size, &dest_buf, &dest_size);
+  FX_Free(dest_buf);
+  return 0;
+}
diff --git a/testing/fuzzers/pdf_codec_bmp_fuzzer.cc b/testing/fuzzers/pdf_codec_bmp_fuzzer.cc
new file mode 100644
index 0000000000..71f9150f5c
--- /dev/null
+++ b/testing/fuzzers/pdf_codec_bmp_fuzzer.cc
@@ -0,0 +1,9 @@
+// Copyright 2016 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 "testing/fuzzers/xfa_codec_fuzzer.h"
+
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
+  return XFACodecFuzzer::Fuzz(data, size, FXCODEC_IMAGE_BMP);
+}
diff --git a/testing/fuzzers/pdf_codec_fax_fuzzer.cc b/testing/fuzzers/pdf_codec_fax_fuzzer.cc
new file mode 100644
index 0000000000..f6cc1e7200
--- /dev/null
+++ b/testing/fuzzers/pdf_codec_fax_fuzzer.cc
@@ -0,0 +1,43 @@
+// Copyright 2016 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 <cstdint>
+#include <memory>
+
+#include "core/fxcodec/codec/ccodec_faxmodule.h"
+#include "core/fxcodec/codec/ccodec_scanlinedecoder.h"
+
+static int GetInteger(const uint8_t* data) {
+  return data[0] | data[1] << 8 | data[2] << 16 | data[3] << 24;
+}
+
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
+  const int kParameterSize = 21;
+  if (size < kParameterSize)
+    return 0;
+
+  int width = GetInteger(data);
+  int height = GetInteger(data + 4);
+  int K = GetInteger(data + 8);
+  int Columns = GetInteger(data + 12);
+  int Rows = GetInteger(data + 16);
+  bool EndOfLine = !(data[20] & 0x01);
+  bool ByteAlign = !(data[20] & 0x02);
+  bool BlackIs1 = !(data[20] & 0x04);
+  data += kParameterSize;
+  size -= kParameterSize;
+
+  CCodec_FaxModule fax_module;
+  std::unique_ptr<CCodec_ScanlineDecoder> decoder(
+      fax_module.CreateDecoder(data, size, width, height, K, EndOfLine,
+                               ByteAlign, BlackIs1, Columns, Rows));
+
+  if (decoder) {
+    int line = 0;
+    while (decoder->GetScanline(line))
+      line++;
+  }
+
+  return 0;
+}
diff --git a/testing/fuzzers/pdf_codec_gif_fuzzer.cc b/testing/fuzzers/pdf_codec_gif_fuzzer.cc
new file mode 100644
index 0000000000..69129e7068
--- /dev/null
+++ b/testing/fuzzers/pdf_codec_gif_fuzzer.cc
@@ -0,0 +1,9 @@
+// Copyright 2016 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 "testing/fuzzers/xfa_codec_fuzzer.h"
+
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
+  return XFACodecFuzzer::Fuzz(data, size, FXCODEC_IMAGE_GIF);
+}
diff --git a/testing/fuzzers/pdf_codec_icc_fuzzer.cc b/testing/fuzzers/pdf_codec_icc_fuzzer.cc
new file mode 100644
index 0000000000..7021017953
--- /dev/null
+++ b/testing/fuzzers/pdf_codec_icc_fuzzer.cc
@@ -0,0 +1,25 @@
+// Copyright 2016 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 <cstdint>
+
+#include "core/fxcodec/codec/ccodec_iccmodule.h"
+
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
+  CCodec_IccModule icc_module;
+  uint32_t nComponent = 0;
+  std::unique_ptr<CLcmsCmm> transform =
+      icc_module.CreateTransform_sRGB(data, size, &nComponent);
+
+  if (transform) {
+    float src[4];
+    float dst[4];
+    for (int i = 0; i < 4; i++)
+      src[i] = 0.5f;
+    icc_module.SetComponents(nComponent);
+    icc_module.Translate(transform.get(), src, dst);
+  }
+
+  return 0;
+}
diff --git a/testing/fuzzers/pdf_codec_jbig2_fuzzer.cc b/testing/fuzzers/pdf_codec_jbig2_fuzzer.cc
new file mode 100644
index 0000000000..7b8e2aac33
--- /dev/null
+++ b/testing/fuzzers/pdf_codec_jbig2_fuzzer.cc
@@ -0,0 +1,59 @@
+// Copyright 2016 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 <cstdint>
+
+#include "core/fpdfapi/parser/cpdf_stream.h"
+#include "core/fpdfapi/parser/cpdf_stream_acc.h"
+#include "core/fxcodec/JBig2_DocumentContext.h"
+#include "core/fxcodec/codec/ccodec_jbig2module.h"
+#include "core/fxcodec/jbig2/JBig2_Context.h"
+#include "core/fxcrt/fx_safe_types.h"
+#include "core/fxge/dib/cfx_dibitmap.h"
+#include "core/fxge/fx_dib.h"
+#include "third_party/base/ptr_util.h"
+
+static uint32_t GetInteger(const uint8_t* data) {
+  return data[0] | data[1] << 8 | data[2] << 16 | data[3] << 24;
+}
+
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
+  const size_t kParameterSize = 8;
+  if (size < kParameterSize)
+    return 0;
+
+  uint32_t width = GetInteger(data);
+  uint32_t height = GetInteger(data + 4);
+  size -= kParameterSize;
+  data += kParameterSize;
+
+  static constexpr uint32_t kMemLimit = 512000000;   // 512 MB
+  static constexpr uint32_t k1bppRgbComponents = 4;  // From CFX_DIBitmap impl.
+  FX_SAFE_UINT32 mem = width;
+  mem *= height;
+  mem *= k1bppRgbComponents;
+  if (!mem.IsValid() || mem.ValueOrDie() > kMemLimit)
+    return 0;
+
+  auto bitmap = pdfium::MakeRetain<CFX_DIBitmap>();
+  if (!bitmap->Create(width, height, FXDIB_1bppRgb))
+    return 0;
+
+  auto stream = pdfium::MakeUnique<CPDF_Stream>();
+  stream->AsStream()->SetData(data, size);
+
+  auto src_stream = pdfium::MakeRetain<CPDF_StreamAcc>(stream->AsStream());
+  src_stream->LoadAllDataRaw();
+
+  CCodec_Jbig2Module module;
+  CCodec_Jbig2Context jbig2_context;
+  std::unique_ptr<JBig2_DocumentContext> document_context;
+  FXCODEC_STATUS status = module.StartDecode(
+      &jbig2_context, &document_context, width, height, src_stream, nullptr,
+      bitmap->GetBuffer(), bitmap->GetPitch(), nullptr);
+
+  while (status == FXCODEC_STATUS_DECODE_TOBECONTINUE)
+    status = module.ContinueDecode(&jbig2_context, nullptr);
+  return 0;
+}
diff --git a/testing/fuzzers/pdf_codec_jpeg_fuzzer.cc b/testing/fuzzers/pdf_codec_jpeg_fuzzer.cc
new file mode 100644
index 0000000000..eaa0889e3c
--- /dev/null
+++ b/testing/fuzzers/pdf_codec_jpeg_fuzzer.cc
@@ -0,0 +1,9 @@
+// Copyright 2016 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 "testing/fuzzers/xfa_codec_fuzzer.h"
+
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
+  return XFACodecFuzzer::Fuzz(data, size, FXCODEC_IMAGE_JPG);
+}
diff --git a/testing/fuzzers/pdf_codec_png_fuzzer.cc b/testing/fuzzers/pdf_codec_png_fuzzer.cc
new file mode 100644
index 0000000000..61a65748fe
--- /dev/null
+++ b/testing/fuzzers/pdf_codec_png_fuzzer.cc
@@ -0,0 +1,9 @@
+// Copyright 2016 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 "testing/fuzzers/xfa_codec_fuzzer.h"
+
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
+  return XFACodecFuzzer::Fuzz(data, size, FXCODEC_IMAGE_PNG);
+}
diff --git a/testing/fuzzers/pdf_codec_rle_fuzzer.cc b/testing/fuzzers/pdf_codec_rle_fuzzer.cc
new file mode 100644
index 0000000000..c86671e5f4
--- /dev/null
+++ b/testing/fuzzers/pdf_codec_rle_fuzzer.cc
@@ -0,0 +1,18 @@
+// 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 <cstdint>
+#include <memory>
+
+#include "core/fxcodec/codec/ccodec_basicmodule.h"
+#include "core/fxcrt/fx_memory.h"
+
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
+  uint8_t* dest_buf = nullptr;
+  uint32_t dest_size = 0;
+  CCodec_BasicModule encoder_module;
+  encoder_module.RunLengthEncode(data, size, &dest_buf, &dest_size);
+  FX_Free(dest_buf);
+  return 0;
+}
diff --git a/testing/fuzzers/pdf_codec_tiff_fuzzer.cc b/testing/fuzzers/pdf_codec_tiff_fuzzer.cc
new file mode 100644
index 0000000000..187c311fc7
--- /dev/null
+++ b/testing/fuzzers/pdf_codec_tiff_fuzzer.cc
@@ -0,0 +1,9 @@
+// Copyright 2016 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 "testing/fuzzers/xfa_codec_fuzzer.h"
+
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
+  return XFACodecFuzzer::Fuzz(data, size, FXCODEC_IMAGE_TIFF);
+}
diff --git a/testing/fuzzers/pdf_css_fuzzer.cc b/testing/fuzzers/pdf_css_fuzzer.cc
new file mode 100644
index 0000000000..4f2f410aa3
--- /dev/null
+++ b/testing/fuzzers/pdf_css_fuzzer.cc
@@ -0,0 +1,27 @@
+// Copyright 2016 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 <memory>
+
+#include "core/fxcrt/css/cfx_css.h"
+#include "core/fxcrt/css/cfx_csssyntaxparser.h"
+#include "core/fxcrt/fx_string.h"
+#include "core/fxcrt/retain_ptr.h"
+
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
+  WideString input =
+      WideString::FromUTF8(ByteStringView(data, static_cast<size_t>(size)));
+
+  // If we convert the input into an empty string bail out.
+  if (input.GetLength() == 0)
+    return 0;
+
+  CFX_CSSSyntaxParser parser(input.c_str(), input.GetLength());
+  CFX_CSSSyntaxStatus status;
+  do {
+    status = parser.DoSyntaxParse();
+  } while (status != CFX_CSSSyntaxStatus::Error &&
+           status != CFX_CSSSyntaxStatus::EOS);
+  return 0;
+}
diff --git a/testing/fuzzers/pdf_fm2js_fuzzer.cc b/testing/fuzzers/pdf_fm2js_fuzzer.cc
new file mode 100644
index 0000000000..2541dfbcc8
--- /dev/null
+++ b/testing/fuzzers/pdf_fm2js_fuzzer.cc
@@ -0,0 +1,23 @@
+// Copyright 2016 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 <cstddef>
+#include <cstdint>
+
+#include "core/fxcrt/cfx_widetextbuf.h"
+#include "core/fxcrt/fx_safe_types.h"
+#include "core/fxcrt/fx_string.h"
+#include "fxjs/cfxjse_formcalc_context.h"
+
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
+  FX_SAFE_SIZE_T safe_size = size;
+  if (!safe_size.IsValid())
+    return 0;
+
+  CFX_WideTextBuf js;
+  WideString input =
+      WideString::FromUTF8(ByteStringView(data, safe_size.ValueOrDie()));
+  CFXJSE_FormCalcContext::Translate(input.AsStringView(), &js);
+  return 0;
+}
diff --git a/testing/fuzzers/pdf_font_fuzzer.cc b/testing/fuzzers/pdf_font_fuzzer.cc
new file mode 100644
index 0000000000..7c596307f0
--- /dev/null
+++ b/testing/fuzzers/pdf_font_fuzzer.cc
@@ -0,0 +1,31 @@
+// 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 <cstring>
+#include <memory>
+
+#include "public/cpp/fpdf_scopers.h"
+#include "public/fpdf_edit.h"
+#include "public/fpdfview.h"
+
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
+  if (size < 2)
+    return 0;
+
+  ScopedFPDFDocument doc(FPDF_CreateNewDocument());
+  ScopedFPDFPage page(FPDFPage_New(doc.get(), 0, 612, 792));
+  int font_type = data[0];
+  FPDF_BOOL cid = data[1];
+  data += 2;
+  size -= 2;
+  ScopedFPDFFont font(FPDFText_LoadFont(doc.get(), data, size, font_type, cid));
+  if (!font)
+    return 0;
+
+  FPDF_PAGEOBJECT text_object =
+      FPDFPageObj_CreateTextObj(doc.get(), font.get(), 12.0f);
+  FPDFPage_InsertObject(page.get(), text_object);
+  FPDFPage_GenerateContent(page.get());
+  return 0;
+}
diff --git a/testing/fuzzers/pdf_formcalc_fuzzer.cc b/testing/fuzzers/pdf_formcalc_fuzzer.cc
new file mode 100644
index 0000000000..08e22bb247
--- /dev/null
+++ b/testing/fuzzers/pdf_formcalc_fuzzer.cc
@@ -0,0 +1,16 @@
+// 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 "core/fxcrt/cfx_widetextbuf.h"
+#include "core/fxcrt/fx_string.h"
+#include "xfa/fxfa/fm2js/cxfa_fmparser.h"
+
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
+  WideString input = WideString::FromUTF8(ByteStringView(data, size));
+
+  CXFA_FMParser parser(input.AsStringView());
+  parser.Parse();
+
+  return 0;
+}
diff --git a/testing/fuzzers/pdf_fuzzer_init.cc b/testing/fuzzers/pdf_fuzzer_init.cc
new file mode 100644
index 0000000000..4b9790c3f8
--- /dev/null
+++ b/testing/fuzzers/pdf_fuzzer_init.cc
@@ -0,0 +1,21 @@
+// 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 <string.h>
+
+#include "public/fpdfview.h"
+
+// Initialize the library once for all runs of the fuzzer.
+struct TestCase {
+  TestCase() {
+    memset(&config, '\0', sizeof(config));
+    config.version = 2;
+    config.m_pUserFontPaths = nullptr;
+    config.m_pIsolate = nullptr;
+    config.m_v8EmbedderSlot = 0;
+    FPDF_InitLibraryWithConfig(&config);
+  }
+  FPDF_LIBRARY_CONFIG config;
+};
+static TestCase* testCase = new TestCase();
diff --git a/testing/fuzzers/pdf_hint_table_fuzzer.cc b/testing/fuzzers/pdf_hint_table_fuzzer.cc
new file mode 100644
index 0000000000..50ca5cd693
--- /dev/null
+++ b/testing/fuzzers/pdf_hint_table_fuzzer.cc
@@ -0,0 +1,93 @@
+// Copyright 2016 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 <cstdint>
+
+#include "core/fpdfapi/parser/cpdf_array.h"
+#include "core/fpdfapi/parser/cpdf_boolean.h"
+#include "core/fpdfapi/parser/cpdf_dictionary.h"
+#include "core/fpdfapi/parser/cpdf_hint_tables.h"
+#include "core/fpdfapi/parser/cpdf_linearized_header.h"
+#include "core/fpdfapi/parser/cpdf_number.h"
+#include "core/fxcrt/cfx_bitstream.h"
+#include "third_party/base/ptr_util.h"
+#include "third_party/base/span.h"
+
+int32_t GetData(const int32_t** data32, const uint8_t** data, size_t* size) {
+  const int32_t* ret = *data32;
+  ++(*data32);
+  *data += 4;
+  *size -= 4;
+  return *ret;
+}
+
+class HintTableForFuzzing : public CPDF_HintTables {
+ public:
+  HintTableForFuzzing(CPDF_LinearizedHeader* pLinearized,
+                      int shared_hint_table_offset)
+      : CPDF_HintTables(nullptr, pLinearized),
+        shared_hint_table_offset_(shared_hint_table_offset) {}
+  ~HintTableForFuzzing() {}
+
+  void Fuzz(const uint8_t* data, size_t size) {
+    if (shared_hint_table_offset_ <= 0)
+      return;
+
+    if (size < static_cast<size_t>(shared_hint_table_offset_))
+      return;
+
+    CFX_BitStream bs(pdfium::make_span(data, size));
+    if (!ReadPageHintTable(&bs))
+      return;
+    ReadSharedObjHintTable(&bs, shared_hint_table_offset_);
+  }
+
+ private:
+  int shared_hint_table_offset_;
+};
+
+class FakeLinearized : public CPDF_LinearizedHeader {
+ public:
+  explicit FakeLinearized(CPDF_Dictionary* linearized_dict)
+      : CPDF_LinearizedHeader(linearized_dict, 0) {}
+};
+
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
+  // Need 28 bytes for |linearized_dict|.
+  // The header section of page offset hint table is 36 bytes.
+  // The header section of shared object hint table is 24 bytes.
+  if (size < 28 + 36 + 24)
+    return 0;
+
+  const int32_t* data32 = reinterpret_cast<const int32_t*>(data);
+
+  auto linearized_dict = pdfium::MakeUnique<CPDF_Dictionary>();
+  // Set initial value.
+  linearized_dict->SetNewFor<CPDF_Boolean>("Linearized", true);
+  // Set first page end offset
+  linearized_dict->SetNewFor<CPDF_Number>("E", GetData(&data32, &data, &size));
+  // Set page count
+  linearized_dict->SetNewFor<CPDF_Number>("N", GetData(&data32, &data, &size));
+  // Set first page obj num
+  linearized_dict->SetNewFor<CPDF_Number>("O", GetData(&data32, &data, &size));
+  // Set first page no
+  linearized_dict->SetNewFor<CPDF_Number>("P", GetData(&data32, &data, &size));
+
+  auto hint_info = pdfium::MakeUnique<CPDF_Array>();
+  // Add primary hint stream offset
+  hint_info->AddNew<CPDF_Number>(GetData(&data32, &data, &size));
+  // Add primary hint stream size
+  hint_info->AddNew<CPDF_Number>(GetData(&data32, &data, &size));
+  // Set hint stream info.
+  linearized_dict->SetFor("H", std::move(hint_info));
+
+  const int shared_hint_table_offset = GetData(&data32, &data, &size);
+
+  {
+    FakeLinearized linearized(linearized_dict.get());
+    HintTableForFuzzing hint_table(&linearized, shared_hint_table_offset);
+    hint_table.Fuzz(data, size);
+  }
+  return 0;
+}
diff --git a/testing/fuzzers/pdf_jpx_fuzzer.cc b/testing/fuzzers/pdf_jpx_fuzzer.cc
new file mode 100644
index 0000000000..da65bc2d9a
--- /dev/null
+++ b/testing/fuzzers/pdf_jpx_fuzzer.cc
@@ -0,0 +1,57 @@
+// Copyright 2016 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 <cstdint>
+#include <memory>
+#include <vector>
+
+#include "core/fxcodec/codec/ccodec_jpxmodule.h"
+#include "core/fxcodec/codec/cjpx_decoder.h"
+#include "core/fxcrt/fx_safe_types.h"
+#include "core/fxge/dib/cfx_dibitmap.h"
+#include "core/fxge/fx_dib.h"
+
+CCodec_JpxModule g_module;
+
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
+  std::unique_ptr<CJPX_Decoder> decoder =
+      g_module.CreateDecoder(data, size, nullptr);
+  if (!decoder)
+    return 0;
+
+  uint32_t width;
+  uint32_t height;
+  uint32_t components;
+  g_module.GetImageInfo(decoder.get(), &width, &height, &components);
+
+  static constexpr uint32_t kMemLimit = 1024 * 1024 * 1024;  // 1 GB.
+  FX_SAFE_UINT32 mem = width;
+  mem *= height;
+  mem *= components;
+  if (!mem.IsValid() || mem.ValueOrDie() > kMemLimit)
+    return 0;
+
+  FXDIB_Format format;
+  if (components == 1) {
+    format = FXDIB_8bppRgb;
+  } else if (components <= 3) {
+    format = FXDIB_Rgb;
+  } else if (components == 4) {
+    format = FXDIB_Rgb32;
+  } else {
+    width = (width * components + 2) / 3;
+    format = FXDIB_Rgb;
+  }
+  auto bitmap = pdfium::MakeRetain<CFX_DIBitmap>();
+  if (!bitmap->Create(width, height, format))
+    return 0;
+
+  std::vector<uint8_t> output_offsets(components);
+  for (uint32_t i = 0; i < components; ++i)
+    output_offsets[i] = i;
+
+  g_module.Decode(decoder.get(), bitmap->GetBuffer(), bitmap->GetPitch(),
+                  output_offsets);
+  return 0;
+}
diff --git a/testing/fuzzers/pdf_lzw_fuzzer.cc b/testing/fuzzers/pdf_lzw_fuzzer.cc
new file mode 100644
index 0000000000..7e10d2a1ee
--- /dev/null
+++ b/testing/fuzzers/pdf_lzw_fuzzer.cc
@@ -0,0 +1,58 @@
+// 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;
+}
diff --git a/testing/fuzzers/pdf_psengine_fuzzer.cc b/testing/fuzzers/pdf_psengine_fuzzer.cc
new file mode 100644
index 0000000000..d72088d4e3
--- /dev/null
+++ b/testing/fuzzers/pdf_psengine_fuzzer.cc
@@ -0,0 +1,15 @@
+// Copyright 2016 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 <cstdint>
+
+#include "core/fpdfapi/page/cpdf_psengine.h"
+#include "third_party/base/span.h"
+
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
+  CPDF_PSEngine engine;
+  if (engine.Parse(pdfium::make_span(data, size)))
+    engine.Execute();
+  return 0;
+}
diff --git a/testing/fuzzers/pdf_streamparser_fuzzer.cc b/testing/fuzzers/pdf_streamparser_fuzzer.cc
new file mode 100644
index 0000000000..4d9a368916
--- /dev/null
+++ b/testing/fuzzers/pdf_streamparser_fuzzer.cc
@@ -0,0 +1,19 @@
+// Copyright 2016 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 <cstdint>
+#include <memory>
+
+#include "core/fpdfapi/page/cpdf_streamparser.h"
+#include "core/fpdfapi/parser/cpdf_object.h"
+#include "third_party/base/span.h"
+
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
+  CPDF_StreamParser parser(pdfium::make_span(data, size));
+  while (std::unique_ptr<CPDF_Object> pObj =
+             parser.ReadNextObject(true, false, 0))
+    continue;
+
+  return 0;
+}
diff --git a/testing/fuzzers/pdf_xml_fuzzer.cc b/testing/fuzzers/pdf_xml_fuzzer.cc
new file mode 100644
index 0000000000..a3c399f78d
--- /dev/null
+++ b/testing/fuzzers/pdf_xml_fuzzer.cc
@@ -0,0 +1,36 @@
+// Copyright 2016 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 <cstddef>
+#include <cstdint>
+#include <memory>
+
+#include "core/fxcrt/cfx_memorystream.h"
+#include "core/fxcrt/fx_safe_types.h"
+#include "core/fxcrt/fx_system.h"
+#include "core/fxcrt/xml/cfx_xmldocument.h"
+#include "core/fxcrt/xml/cfx_xmlelement.h"
+#include "core/fxcrt/xml/cfx_xmlparser.h"
+#include "third_party/base/ptr_util.h"
+
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
+  FX_SAFE_SIZE_T safe_size = size;
+  if (!safe_size.IsValid())
+    return 0;
+
+  auto stream = pdfium::MakeRetain<CFX_MemoryStream>(const_cast<uint8_t*>(data),
+                                                     size, false);
+
+  CFX_XMLParser parser(stream);
+  std::unique_ptr<CFX_XMLDocument> doc = parser.Parse();
+  if (!doc || !doc->GetRoot())
+    return 0;
+
+  for (CFX_XMLNode* pXMLNode = doc->GetRoot()->GetFirstChild(); pXMLNode;
+       pXMLNode = pXMLNode->GetNextSibling()) {
+    if (pXMLNode->GetType() == FX_XMLNODE_Element)
+      break;
+  }
+  return 0;
+}
diff --git a/testing/fuzzers/unittest_main.cc b/testing/fuzzers/unittest_main.cc
new file mode 100644
index 0000000000..f6b29e483f
--- /dev/null
+++ b/testing/fuzzers/unittest_main.cc
@@ -0,0 +1,41 @@
+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// A simple unit-test style driver for libfuzzer tests.
+// Usage: <fuzzer_test> <file>...
+
+#include <fstream>
+#include <iostream>
+#include <iterator>
+#include <vector>
+
+// Libfuzzer API.
+extern "C" {
+// User function.
+int LLVMFuzzerTestOneInput(const unsigned char* data, size_t size);
+// Initialization function.
+__attribute__((weak)) int LLVMFuzzerInitialize(int* argc, char*** argv);
+}
+
+std::vector<char> readFile(std::string path) {
+  std::ifstream in(path);
+  return std::vector<char>((std::istreambuf_iterator<char>(in)),
+                           std::istreambuf_iterator<char>());
+}
+
+int main(int argc, char** argv) {
+  if (argc == 1) {
+    std::cerr << "Usage: " << argv[0] << " <file>..." << std::endl;
+    exit(1);
+  }
+
+  if (LLVMFuzzerInitialize)
+    LLVMFuzzerInitialize(&argc, &argv);
+
+  for (int i = 1; i < argc; ++i) {
+    std::cout << argv[i] << std::endl;
+    auto v = readFile(argv[i]);
+    LLVMFuzzerTestOneInput((const unsigned char*)v.data(), v.size());
+  }
+}
diff --git a/testing/fuzzers/xfa_codec_fuzzer.h b/testing/fuzzers/xfa_codec_fuzzer.h
new file mode 100644
index 0000000000..bfc069a31d
--- /dev/null
+++ b/testing/fuzzers/xfa_codec_fuzzer.h
@@ -0,0 +1,87 @@
+// Copyright 2016 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.
+
+#ifndef TESTING_FUZZERS_XFA_CODEC_FUZZER_H_
+#define TESTING_FUZZERS_XFA_CODEC_FUZZER_H_
+
+#include <memory>
+
+#include "core/fxcodec/codec/ccodec_progressivedecoder.h"
+#include "core/fxcodec/fx_codec.h"
+#include "core/fxge/dib/cfx_dibitmap.h"
+#include "testing/fx_string_testhelpers.h"
+#include "third_party/base/ptr_util.h"
+
+#ifdef PDF_ENABLE_XFA_BMP
+#include "core/fxcodec/codec/ccodec_bmpmodule.h"
+#endif  // PDF_ENABLE_XFA_BMP
+
+#ifdef PDF_ENABLE_XFA_GIF
+#include "core/fxcodec/codec/ccodec_gifmodule.h"
+#endif  // PDF_ENABLE_XFA_GIF
+
+#ifdef PDF_ENABLE_XFA_PNG
+#include "core/fxcodec/codec/ccodec_pngmodule.h"
+#endif  // PDF_ENABLE_XFA_PNG
+
+#ifdef PDF_ENABLE_XFA_TIFF
+#include "core/fxcodec/codec/ccodec_tiffmodule.h"
+#endif  // PDF_ENABLE_XFA_TIFF
+
+// Support up to 64 MB. This prevents trivial OOM when MSAN is on and
+// time outs.
+const int kXFACodecFuzzerPixelLimit = 64000000;
+
+class XFACodecFuzzer {
+ public:
+  static int Fuzz(const uint8_t* data, size_t size, FXCODEC_IMAGE_TYPE type) {
+    auto mgr = pdfium::MakeUnique<CCodec_ModuleMgr>();
+#ifdef PDF_ENABLE_XFA_BMP
+    mgr->SetBmpModule(pdfium::MakeUnique<CCodec_BmpModule>());
+#endif  // PDF_ENABLE_XFA_BMP
+#ifdef PDF_ENABLE_XFA_GIF
+    mgr->SetGifModule(pdfium::MakeUnique<CCodec_GifModule>());
+#endif  // PDF_ENABLE_XFA_GIF
+#ifdef PDF_ENABLE_XFA_PNG
+    mgr->SetPngModule(pdfium::MakeUnique<CCodec_PngModule>());
+#endif  // PDF_ENABLE_XFA_PNG
+#ifdef PDF_ENABLE_XFA_TIFF
+    mgr->SetTiffModule(pdfium::MakeUnique<CCodec_TiffModule>());
+#endif  // PDF_ENABLE_XFA_TIFF
+
+    std::unique_ptr<CCodec_ProgressiveDecoder> decoder =
+        mgr->CreateProgressiveDecoder();
+    auto source = pdfium::MakeRetain<CFX_BufferSeekableReadStream>(data, size);
+    FXCODEC_STATUS status = decoder->LoadImageInfo(source, type, nullptr, true);
+    if (status != FXCODEC_STATUS_FRAME_READY)
+      return 0;
+
+    // Skipping very large images, since they will take a long time and may lead
+    // to OOM.
+    FX_SAFE_UINT32 bitmap_size = decoder->GetHeight();
+    bitmap_size *= decoder->GetWidth();
+    bitmap_size *= 4;  // From CFX_DIBitmap impl.
+    if (!bitmap_size.IsValid() ||
+        bitmap_size.ValueOrDie() > kXFACodecFuzzerPixelLimit) {
+      return 0;
+    }
+
+    auto bitmap = pdfium::MakeRetain<CFX_DIBitmap>();
+    bitmap->Create(decoder->GetWidth(), decoder->GetHeight(), FXDIB_Argb);
+
+    size_t frames;
+    std::tie(status, frames) = decoder->GetFrames();
+    if (status != FXCODEC_STATUS_DECODE_READY || frames == 0)
+      return 0;
+
+    status = decoder->StartDecode(bitmap, 0, 0, bitmap->GetWidth(),
+                                  bitmap->GetHeight());
+    while (status == FXCODEC_STATUS_DECODE_TOBECONTINUE)
+      status = decoder->ContinueDecode();
+
+    return 0;
+  }
+};
+
+#endif  // TESTING_FUZZERS_XFA_CODEC_FUZZER_H_