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/GrShaderCaps.h"
9 #include "src/sksl/SkSLCompiler.h"
10
11 #include "fuzz/Fuzz.h"
12
FuzzSKSL2SPIRV(sk_sp<SkData> bytes)13 bool FuzzSKSL2SPIRV(sk_sp<SkData> bytes) {
14 std::unique_ptr<GrShaderCaps> caps = SkSL::ShaderCapsFactory::Default();
15 SkSL::Compiler compiler(caps.get());
16 SkSL::String output;
17 SkSL::Program::Settings settings;
18
19 // This tells the compiler where the rt-flip uniform will live should it be required. For
20 // fuzzing purposes we don't care where that is, but the compiler will report an error if we
21 // leave them at their default invalid values, or if the offset overlaps another uniform.
22 settings.fRTFlipOffset = 16384;
23 settings.fRTFlipSet = 0;
24 settings.fRTFlipBinding = 0;
25
26 std::unique_ptr<SkSL::Program> program = compiler.convertProgram(
27 SkSL::ProgramKind::kFragment,
28 SkSL::String((const char*) bytes->data(),
29 bytes->size()),
30 settings);
31 if (!program || !compiler.toSPIRV(*program, &output)) {
32 return false;
33 }
34 return true;
35 }
36
37 #if defined(SK_BUILD_FOR_LIBFUZZER)
LLVMFuzzerTestOneInput(const uint8_t * data,size_t size)38 extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
39 if (size > 3000) {
40 return 0;
41 }
42 auto bytes = SkData::MakeWithoutCopy(data, size);
43 FuzzSKSL2SPIRV(bytes);
44 return 0;
45 }
46 #endif
47