b0697081b5
If the passed-in shader references RTFlip (i.e., sk_FragCoord is used), the settings must contain RTFlip layout info; otherwise, an error occurs. Originally, the fuzzer detected this as a problem because the error was being delivered via SK_ABORT, but it's failing more cleanly now that Ethan's new error handling code is in place (causing the fuzzer to report that the bug was "fixed"). With this CL, the oss-fuzz shader will actually compile successfully in SPIR-V instead of leading to an error. Change-Id: I3268e84bd8e01c95a25ed0845a37324e98033c4b Bug: oss-fuzz:35916 Reviewed-on: https://skia-review.googlesource.com/c/skia/+/439779 Auto-Submit: John Stiles <johnstiles@google.com> Commit-Queue: Brian Osman <brianosman@google.com> Reviewed-by: Brian Osman <brianosman@google.com>
47 lines
1.6 KiB
C++
47 lines
1.6 KiB
C++
/*
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* Copyright 2019 Google, LLC
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#include "src/gpu/GrShaderCaps.h"
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#include "src/sksl/SkSLCompiler.h"
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#include "fuzz/Fuzz.h"
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bool FuzzSKSL2SPIRV(sk_sp<SkData> bytes) {
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sk_sp<GrShaderCaps> caps = SkSL::ShaderCapsFactory::Default();
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SkSL::Compiler compiler(caps.get());
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SkSL::String output;
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SkSL::Program::Settings settings;
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// This tells the compiler where the rt-flip uniform will live should it be required. For
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// fuzzing purposes we don't care where that is, but the compiler will report an error if we
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// leave them at their default invalid values, or if the offset overlaps another uniform.
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settings.fRTFlipOffset = 16384;
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settings.fRTFlipSet = 0;
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settings.fRTFlipBinding = 0;
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std::unique_ptr<SkSL::Program> program = compiler.convertProgram(
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SkSL::ProgramKind::kFragment,
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SkSL::String((const char*) bytes->data(),
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bytes->size()),
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settings);
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if (!program || !compiler.toSPIRV(*program, &output)) {
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return false;
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}
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return true;
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}
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#if defined(SK_BUILD_FOR_LIBFUZZER)
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extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
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if (size > 3000) {
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return 0;
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}
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auto bytes = SkData::MakeWithoutCopy(data, size);
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FuzzSKSL2SPIRV(bytes);
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return 0;
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}
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#endif
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