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//
// 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 <stddef.h>
#include <stdint.h>
#include <unordered_map>
#include <iostream>
#include "compiler/translator/Compiler.h"
#include "angle_gl.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
static std::unordered_map<TranslatorCacheKey, TCompiler *> 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;
}
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 (!ShInitialize())
{
return 0;
}
TranslatorCacheKey key;
key.type = type;
key.spec = spec;
key.output = output;
if (translators.find(key) == translators.end())
{
TCompiler *translator = ConstructCompiler(type, static_cast<ShShaderSpec>(spec),
static_cast<ShShaderOutput>(output));
if (!translator)
{
return 0;
}
ShBuiltInResources resources;
ShInitBuiltInResources(&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;
if (!translator->Init(resources))
{
DeleteCompiler(translator);
return 0;
}
translators[key] = translator;
}
TCompiler *translator = translators[key];
const char *shaderStrings[] = {reinterpret_cast<const char *>(data)};
translator->compile(shaderStrings, 1, options);
return 0;
}
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