1 /*
2 * Copyright 2019 Google, LLC
3 *
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
6 */
7
8 #include "src/gpu/ganesh/GrShaderCaps.h"
9 #include "src/sksl/SkSLCompiler.h"
10 #include "src/sksl/SkSLProgramKind.h"
11 #include "src/sksl/SkSLProgramSettings.h"
12 #include "src/sksl/codegen/SkSLSPIRVCodeGenerator.h"
13 #include "src/sksl/ir/SkSLProgram.h"
14
15 #include "fuzz/Fuzz.h"
16
FuzzSKSL2SPIRV(const uint8_t * data,size_t size)17 bool FuzzSKSL2SPIRV(const uint8_t *data, size_t size) {
18 SkSL::Compiler compiler;
19 SkSL::ProgramSettings settings;
20
21 // This tells the compiler where the rt-flip uniform will live should it be required. For
22 // fuzzing purposes we don't care where that is, but the compiler will report an error if we
23 // leave them at their default invalid values, or if the offset overlaps another uniform.
24 settings.fRTFlipOffset = 16384;
25 settings.fRTFlipSet = 0;
26 settings.fRTFlipBinding = 0;
27
28 std::unique_ptr<SkSL::Program> program =
29 compiler.convertProgram(SkSL::ProgramKind::kFragment,
30 std::string(reinterpret_cast<const char*>(data), size),
31 settings);
32 std::string output;
33 if (!program || !SkSL::ToSPIRV(*program, SkSL::ShaderCapsFactory::Default(), &output)) {
34 return false;
35 }
36 return true;
37 }
38
39 #if defined(SK_BUILD_FOR_LIBFUZZER)
LLVMFuzzerTestOneInput(const uint8_t * data,size_t size)40 extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
41 if (size > 3000) {
42 return 0;
43 }
44 FuzzSKSL2SPIRV(data, size);
45 return 0;
46 }
47 #endif
48