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// Copyright 2024 The Dawn & Tint Authors
//
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// modification, are permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice, this
// list of conditions and the following disclaimer.
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// 2. Redistributions in binary form must reproduce the above copyright notice,
// this list of conditions and the following disclaimer in the documentation
// and/or other materials provided with the distribution.
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// 3. Neither the name of the copyright holder nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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#include "src/tint/api/common/binding_point.h"
#include "src/tint/cmd/fuzz/wgsl/fuzz.h"
#include "src/tint/lang/core/access.h"
#include "src/tint/lang/wgsl/ast/module.h"
#include "src/tint/lang/wgsl/ast/transform/binding_remapper.h"
#include "src/tint/lang/wgsl/sem/variable.h"
namespace tint::ast::transform {
namespace {
bool CanRun(const Program& program, const BindingRemapper::Remappings& remappings) {
if (!remappings.access_controls.empty()) {
// Changing access is likely to cause WGSL validation failures. Just skip these for now.
return false;
}
if (!remappings.allow_collisions) {
Hashset<BindingPoint, 8> binding_points;
for (auto* global : program.AST().GlobalVariables()) {
if (auto* sem = program.Sem().Get<sem::GlobalVariable>(global)) {
if (auto binding_point = sem->Attributes().binding_point) {
binding_points.Add(binding_point.value());
}
}
}
Hashset<BindingPoint, 8> new_binding_points;
for (auto& remapping : remappings.binding_points) {
if (binding_points.Remove(remapping.first)) {
if (!new_binding_points.Add(remapping.second)) {
return false; // Binding collision
}
}
}
for (auto& binding_point : new_binding_points) {
if (!binding_points.Add(binding_point)) {
return false; // Binding collision
}
}
}
return true;
}
void BindingRemapperFuzzer(const Program& program, const BindingRemapper::Remappings& remappings) {
if (!CanRun(program, remappings)) {
return;
}
DataMap inputs;
inputs.Add<BindingRemapper::Remappings>(std::move(remappings));
DataMap outputs;
if (auto result = BindingRemapper{}.Apply(program, inputs, outputs)) {
if (!result->IsValid()) {
TINT_ICE() << "BindingRemapper returned invalid program:\n"
<< Program::printer(*result) << "\n"
<< result->Diagnostics();
}
}
}
} // namespace
} // namespace tint::ast::transform
TINT_WGSL_PROGRAM_FUZZER(tint::ast::transform::BindingRemapperFuzzer);