kc3-lang/angle/src/compiler/fuzz/translator_fuzzer.cpp

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• Hash : c39a19aa
  Author :
  Date : 2017-07-07T18:52:09
  

  Select viewport index in the GLSL/ESSL vertex shader
  
  The patch enables viewport selection for multiview rendering in the
  GLSL/ESSL vertex shader through the use of the GL_NV_viewport_array2
  extension. The AST is modified only for GLSL and ESSL to include the
  viewport selection expression after ViewID_OVR's initialization.
  
  BUG=angleproject:2062
  TEST=angle_unittests
  
  Change-Id: Iee05bb5a4b687ed53ddbdd466f1572227b1f0cde
  

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• src/compiler/fuzz/translator_fuzzer.cpp

• //
  // Copyright (c) 2016 The ANGLE Project Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  //
  
  // translator_fuzzer.cpp: A libfuzzer fuzzer for the shader translator.
  
  #include <cstddef>
  #include <cstdint>
  #include <iostream>
  #include <memory>
  #include <unordered_map>
  
  #include "angle_gl.h"
  #include "compiler/translator/Compiler.h"
  #include "compiler/translator/util.h"
  
  using namespace sh;
  
  struct TranslatorCacheKey
  {
      bool operator==(const TranslatorCacheKey &other) const
      {
          return type == other.type && spec == other.spec && output == other.output;
      }
  
      uint32_t type   = 0;
      uint32_t spec   = 0;
      uint32_t output = 0;
  };
  
  namespace std
  {
  
  template <>
  struct hash<TranslatorCacheKey>
  {
      std::size_t operator()(const TranslatorCacheKey &k) const
      {
          return (hash<uint32_t>()(k.type) << 1) ^ (hash<uint32_t>()(k.spec) >> 1) ^
                 hash<uint32_t>()(k.output);
      }
  };
  }  // namespace std
  
  struct TCompilerDeleter
  {
      void operator()(TCompiler *compiler) const { DeleteCompiler(compiler); }
  };
  
  using UniqueTCompiler = std::unique_ptr<TCompiler, TCompilerDeleter>;
  
  static std::unordered_map<TranslatorCacheKey, UniqueTCompiler> translators;
  
  extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
  {
      // Reserve some size for future compile options
      const size_t kHeaderSize = 128;
  
      if (size <= kHeaderSize)
      {
          return 0;
      }
  
      // Make sure the rest of data will be a valid C string so that we don't have to copy it.
      if (data[size - 1] != 0)
      {
          return 0;
      }
  
      uint32_t type    = *reinterpret_cast<const uint32_t *>(data);
      uint32_t spec    = *reinterpret_cast<const uint32_t *>(data + 4);
      uint32_t output  = *reinterpret_cast<const uint32_t *>(data + 8);
      uint64_t options = *reinterpret_cast<const uint64_t *>(data + 12);
  
      if (type != GL_FRAGMENT_SHADER && type != GL_VERTEX_SHADER)
      {
          return 0;
      }
  
      if (spec != SH_GLES2_SPEC && type != SH_WEBGL_SPEC && spec != SH_GLES3_SPEC &&
          spec != SH_WEBGL2_SPEC)
      {
          return 0;
      }
  
      ShShaderOutput shaderOutput = static_cast<ShShaderOutput>(output);
      if (!(IsOutputGLSL(shaderOutput) || IsOutputESSL(shaderOutput)) &&
          (options & SH_SELECT_VIEW_IN_NV_GLSL_VERTEX_SHADER) != 0u)
      {
          // This compiler option is only available in ESSL and GLSL.
          return 0;
      }
  
      std::vector<uint32_t> validOutputs;
      validOutputs.push_back(SH_ESSL_OUTPUT);
      validOutputs.push_back(SH_GLSL_COMPATIBILITY_OUTPUT);
      validOutputs.push_back(SH_GLSL_130_OUTPUT);
      validOutputs.push_back(SH_GLSL_140_OUTPUT);
      validOutputs.push_back(SH_GLSL_150_CORE_OUTPUT);
      validOutputs.push_back(SH_GLSL_330_CORE_OUTPUT);
      validOutputs.push_back(SH_GLSL_400_CORE_OUTPUT);
      validOutputs.push_back(SH_GLSL_410_CORE_OUTPUT);
      validOutputs.push_back(SH_GLSL_420_CORE_OUTPUT);
      validOutputs.push_back(SH_GLSL_430_CORE_OUTPUT);
      validOutputs.push_back(SH_GLSL_440_CORE_OUTPUT);
      validOutputs.push_back(SH_GLSL_450_CORE_OUTPUT);
      validOutputs.push_back(SH_HLSL_3_0_OUTPUT);
      validOutputs.push_back(SH_HLSL_4_1_OUTPUT);
      validOutputs.push_back(SH_HLSL_4_0_FL9_3_OUTPUT);
      bool found = false;
      for (auto valid : validOutputs)
      {
          found = found || (valid == output);
      }
      if (!found)
      {
          return 0;
      }
  
      size -= kHeaderSize;
      data += kHeaderSize;
  
      if (!sh::Initialize())
      {
          return 0;
      }
  
      TranslatorCacheKey key;
      key.type   = type;
      key.spec   = spec;
      key.output = output;
  
      if (translators.find(key) == translators.end())
      {
          UniqueTCompiler translator(
              ConstructCompiler(type, static_cast<ShShaderSpec>(spec), shaderOutput));
  
          if (translator == nullptr)
          {
              return 0;
          }
  
          ShBuiltInResources resources;
          sh::InitBuiltInResources(&resources);
  
          // Enable all the extensions to have more coverage
          resources.OES_standard_derivatives        = 1;
          resources.OES_EGL_image_external          = 1;
          resources.OES_EGL_image_external_essl3    = 1;
          resources.NV_EGL_stream_consumer_external = 1;
          resources.ARB_texture_rectangle           = 1;
          resources.EXT_blend_func_extended         = 1;
          resources.EXT_draw_buffers                = 1;
          resources.EXT_frag_depth                  = 1;
          resources.EXT_shader_texture_lod          = 1;
          resources.WEBGL_debug_shader_precision    = 1;
          resources.EXT_shader_framebuffer_fetch    = 1;
          resources.NV_shader_framebuffer_fetch     = 1;
          resources.ARM_shader_framebuffer_fetch    = 1;
          resources.EXT_YUV_target                  = 1;
          resources.MaxDualSourceDrawBuffers        = 1;
  
          if (!translator->Init(resources))
          {
              return 0;
          }
  
          translators[key] = std::move(translator);
      }
  
      auto &translator = translators[key];
  
      const char *shaderStrings[] = {reinterpret_cast<const char *>(data)};
      translator->compile(shaderStrings, 1, options);
  
      return 0;
  }
  

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