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dawn-cmake/fuzzers/tint_common_fuzzer.cc

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// Copyright 2021 The Tint Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "fuzzers/tint_common_fuzzer.h"
#include <cstring>
#include <memory>
#include <sstream>
#include <string>
#include <utility>
#include <vector>
#if TINT_BUILD_SPV_READER
#include "spirv-tools/libspirv.hpp"
#endif // TINT_BUILD_SPV_READER
#include "src/ast/module.h"
#include "src/diagnostic/formatter.h"
#include "src/program.h"
namespace tint {
namespace fuzzers {
namespace {
[[noreturn]] void FatalError(const tint::diag::List& diags,
const std::string& msg = "") {
auto printer = tint::diag::Printer::create(stderr, true);
if (!msg.empty()) {
printer->write(msg + "\n", {diag::Color::kRed, true});
}
tint::diag::Formatter().format(diags, printer.get());
__builtin_trap();
}
[[noreturn]] void TintInternalCompilerErrorReporter(
const tint::diag::List& diagnostics) {
FatalError(diagnostics);
}
transform::VertexAttributeDescriptor ExtractVertexAttributeDescriptor(
Reader* r) {
transform::VertexAttributeDescriptor desc{};
desc.format = r->enum_class<transform::VertexFormat>(
static_cast<uint8_t>(transform::VertexFormat::kLastEntry) + 1);
desc.offset = r->read<uint32_t>();
desc.shader_location = r->read<uint32_t>();
return desc;
}
transform::VertexBufferLayoutDescriptor ExtractVertexBufferLayoutDescriptor(
Reader* r) {
transform::VertexBufferLayoutDescriptor desc;
desc.array_stride = r->read<uint32_t>();
desc.step_mode = r->enum_class<transform::InputStepMode>(
static_cast<uint8_t>(transform::InputStepMode::kLastEntry) + 1);
desc.attributes = r->vector(ExtractVertexAttributeDescriptor);
return desc;
}
bool SPIRVToolsValidationCheck(const tint::Program& program,
const std::vector<uint32_t>& spirv) {
spvtools::SpirvTools tools(SPV_ENV_VULKAN_1_1);
const tint::diag::List& diags = program.Diagnostics();
tools.SetMessageConsumer([diags](spv_message_level_t, const char*,
const spv_position_t& pos, const char* msg) {
std::stringstream out;
out << "Unexpected spirv-val error:\n"
<< (pos.line + 1) << ":" << (pos.column + 1) << ": " << msg
<< std::endl;
auto printer = tint::diag::Printer::create(stderr, true);
printer->write(out.str(), {diag::Color::kYellow, false});
tint::diag::Formatter().format(diags, printer.get());
});
return tools.Validate(spirv.data(), spirv.size(),
spvtools::ValidatorOptions());
}
} // namespace
Reader::Reader(const uint8_t* data, size_t size) : data_(data), size_(size) {}
std::string Reader::string() {
auto count = read<uint8_t>();
if (failed_ || size_ < count) {
mark_failed();
return "";
}
std::string out(data_, data_ + count);
data_ += count;
size_ -= count;
return out;
}
void Reader::mark_failed() {
size_ = 0;
failed_ = true;
}
void Reader::read(void* out, size_t n) {
if (n > size_) {
mark_failed();
return;
}
memcpy(out, data_, n);
data_ += n;
size_ -= n;
}
void ExtractBindingRemapperInputs(Reader* r, tint::transform::DataMap* inputs) {
struct Config {
uint8_t old_group;
uint8_t old_binding;
uint8_t new_group;
uint8_t new_binding;
ast::Access new_access;
};
std::vector<Config> configs = r->vector<Config>();
transform::BindingRemapper::BindingPoints binding_points;
transform::BindingRemapper::AccessControls accesses;
for (const auto& config : configs) {
binding_points[{config.old_binding, config.old_group}] = {
config.new_binding, config.new_group};
accesses[{config.old_binding, config.old_group}] = config.new_access;
}
inputs->Add<transform::BindingRemapper::Remappings>(binding_points, accesses);
}
void ExtractFirstIndexOffsetInputs(Reader* r,
tint::transform::DataMap* inputs) {
struct Config {
uint32_t group;
uint32_t binding;
};
Config config = r->read<Config>();
inputs->Add<tint::transform::FirstIndexOffset::BindingPoint>(config.binding,
config.group);
}
void ExtractSingleEntryPointInputs(Reader* r,
tint::transform::DataMap* inputs) {
std::string input = r->string();
transform::SingleEntryPoint::Config cfg(input);
inputs->Add<transform::SingleEntryPoint::Config>(cfg);
}
void ExtractVertexPullingInputs(Reader* r, tint::transform::DataMap* inputs) {
transform::VertexPulling::Config cfg;
cfg.entry_point_name = r->string();
cfg.vertex_state = r->vector(ExtractVertexBufferLayoutDescriptor);
cfg.pulling_group = r->read<uint32_t>();
inputs->Add<transform::VertexPulling::Config>(cfg);
}
void ExtractSpirvOptions(Reader* r, writer::spirv::Options* options) {
*options = r->read<writer::spirv::Options>();
}
void ExtractWgslOptions(Reader* r, writer::wgsl::Options* options) {
*options = r->read<writer::wgsl::Options>();
}
void ExtractHlslOptions(Reader* r, writer::hlsl::Options* options) {
*options = r->read<writer::hlsl::Options>();
}
void ExtractMslOptions(Reader* r, writer::msl::Options* options) {
*options = r->read<writer::msl::Options>();
}
CommonFuzzer::CommonFuzzer(InputFormat input, OutputFormat output)
: input_(input),
output_(output),
transform_manager_(nullptr),
inspector_enabled_(false) {}
CommonFuzzer::~CommonFuzzer() = default;
int CommonFuzzer::Run(const uint8_t* data, size_t size) {
tint::SetInternalCompilerErrorReporter(&TintInternalCompilerErrorReporter);
Program program;
#if TINT_BUILD_WGSL_READER
std::unique_ptr<Source::File> file;
#endif // TINT_BUILD_WGSL_READER
#if TINT_BUILD_SPV_READER
std::vector<uint32_t> spirv_input(size / sizeof(uint32_t));
#endif // TINT_BUILD_SPV_READER
switch (input_) {
#if TINT_BUILD_WGSL_READER
case InputFormat::kWGSL: {
std::string str(reinterpret_cast<const char*>(data), size);
file = std::make_unique<Source::File>("test.wgsl", str);
program = reader::wgsl::Parse(file.get());
break;
}
#endif // TINT_BUILD_WGSL_READER
#if TINT_BUILD_SPV_READER
case InputFormat::kSpv: {
// `spirv_input` has been initialized with the capacity to store `size /
// sizeof(uint32_t)` uint32_t values. If `size` is not a multiple of
// sizeof(uint32_t) then not all of `data` can be copied into
// `spirv_input`, and any trailing bytes are discarded.
std::memcpy(spirv_input.data(), data,
spirv_input.size() * sizeof(uint32_t));
if (spirv_input.empty()) {
return 0;
}
program = reader::spirv::Parse(spirv_input);
break;
}
#endif // TINT_BUILD_SPV_READER
default:
return 0;
}
if (output_ == OutputFormat::kNone) {
return 0;
}
if (!program.IsValid()) {
diagnostics_ = program.Diagnostics();
return 0;
}
#if TINT_BUILD_SPV_READER
if (input_ == InputFormat::kSpv &&
!SPIRVToolsValidationCheck(program, spirv_input)) {
FatalError(program.Diagnostics(),
"Fuzzing detected invalid input spirv not being caught by Tint");
}
#endif // TINT_BUILD_SPV_READER
if (inspector_enabled_) {
inspector::Inspector inspector(&program);
auto entry_points = inspector.GetEntryPoints();
if (inspector.has_error()) {
diagnostics_.add_error(tint::diag::System::Inspector, inspector.error());
return 0;
}
for (auto& ep : entry_points) {
auto remapped_name = inspector.GetRemappedNameForEntryPoint(ep.name);
if (inspector.has_error()) {
diagnostics_.add_error(tint::diag::System::Inspector,
inspector.error());
return 0;
}
auto constant_ids = inspector.GetConstantIDs();
if (inspector.has_error()) {
diagnostics_.add_error(tint::diag::System::Inspector,
inspector.error());
return 0;
}
auto uniform_bindings =
inspector.GetUniformBufferResourceBindings(ep.name);
if (inspector.has_error()) {
diagnostics_.add_error(tint::diag::System::Inspector,
inspector.error());
return 0;
}
auto storage_bindings =
inspector.GetStorageBufferResourceBindings(ep.name);
if (inspector.has_error()) {
diagnostics_.add_error(tint::diag::System::Inspector,
inspector.error());
return 0;
}
auto readonly_bindings =
inspector.GetReadOnlyStorageBufferResourceBindings(ep.name);
if (inspector.has_error()) {
diagnostics_.add_error(tint::diag::System::Inspector,
inspector.error());
return 0;
}
auto sampler_bindings = inspector.GetSamplerResourceBindings(ep.name);
if (inspector.has_error()) {
diagnostics_.add_error(tint::diag::System::Inspector,
inspector.error());
return 0;
}
auto comparison_sampler_bindings =
inspector.GetComparisonSamplerResourceBindings(ep.name);
if (inspector.has_error()) {
diagnostics_.add_error(tint::diag::System::Inspector,
inspector.error());
return 0;
}
auto sampled_texture_bindings =
inspector.GetSampledTextureResourceBindings(ep.name);
if (inspector.has_error()) {
diagnostics_.add_error(tint::diag::System::Inspector,
inspector.error());
return 0;
}
auto multisampled_texture_bindings =
inspector.GetMultisampledTextureResourceBindings(ep.name);
if (inspector.has_error()) {
diagnostics_.add_error(tint::diag::System::Inspector,
inspector.error());
return 0;
}
}
}
if (transform_manager_) {
auto out = transform_manager_->Run(&program, transform_inputs_);
if (!out.program.IsValid()) {
// Transforms can produce error messages for bad input.
// Catch ICEs and errors from non transform systems.
for (const auto& diag : out.program.Diagnostics()) {
if (diag.severity > diag::Severity::Error ||
diag.system != diag::System::Transform) {
FatalError(out.program.Diagnostics(),
"Fuzzing detected valid input program being transformed "
"into an invalid output program");
}
}
}
program = std::move(out.program);
}
switch (output_) {
case OutputFormat::kWGSL: {
#if TINT_BUILD_WGSL_WRITER
auto result = writer::wgsl::Generate(&program, options_wgsl_);
generated_wgsl_ = std::move(result.wgsl);
if (!result.success) {
FatalError(program.Diagnostics(),
"WGSL writer failed: " + result.error);
}
#endif // TINT_BUILD_WGSL_WRITER
break;
}
case OutputFormat::kSpv: {
#if TINT_BUILD_SPV_WRITER
auto result = writer::spirv::Generate(&program, options_spirv_);
generated_spirv_ = std::move(result.spirv);
if (!result.success) {
FatalError(program.Diagnostics(),
"SPIR-V writer failed: " + result.error);
}
if (!SPIRVToolsValidationCheck(program, generated_spirv_)) {
FatalError(program.Diagnostics(),
"Fuzzing detected invalid spirv being emitted by Tint");
}
#endif // TINT_BUILD_SPV_WRITER
break;
}
case OutputFormat::kHLSL: {
#if TINT_BUILD_HLSL_WRITER
auto result = writer::hlsl::Generate(&program, options_hlsl_);
generated_hlsl_ = std::move(result.hlsl);
if (!result.success) {
FatalError(program.Diagnostics(),
"HLSL writer failed: " + result.error);
}
#endif // TINT_BUILD_HLSL_WRITER
break;
}
case OutputFormat::kMSL: {
#if TINT_BUILD_MSL_WRITER
auto result = writer::msl::Generate(&program, options_msl_);
generated_msl_ = std::move(result.msl);
if (!result.success) {
FatalError(program.Diagnostics(), "MSL writer failed: " + result.error);
}
#endif // TINT_BUILD_MSL_WRITER
break;
}
case OutputFormat::kNone:
break;
}
return 0;
}
} // namespace fuzzers
} // namespace tint
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