3e8fae7193
This reverts commit ad3db40d78.
Reason for revert: Chrome doesn't like static initializers.
Original change's description:
> Add inline threshold to SkSL::Program::Settings
>
> Keep the same default value, but add a (private) API to change it when
> compiling SkRuntimeEffect code.
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> Use the new API to improve fuzzer coverage, by fuzzing with inlining
> disabled and (enthusiastically) enabled.
>
> Change-Id: I36424bac95144aeb727cfb949754fbe998d5d7de
> Reviewed-on: https://skia-review.googlesource.com/c/skia/+/308181
> Commit-Queue: Brian Osman <brianosman@google.com>
> Reviewed-by: Kevin Lubick <kjlubick@google.com>
> Reviewed-by: Ethan Nicholas <ethannicholas@google.com>
TBR=kjlubick@google.com,brianosman@google.com,ethannicholas@google.com
Change-Id: Ic233203f3728a7285a1958c53567d915e56023af
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/308757
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>
68 lines
2.2 KiB
C++
68 lines
2.2 KiB
C++
/*
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* Copyright 2020 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 "include/core/SkCanvas.h"
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#include "include/core/SkPaint.h"
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#include "include/core/SkSurface.h"
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#include "include/effects/SkRuntimeEffect.h"
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#include "src/gpu/GrShaderCaps.h"
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#include "fuzz/Fuzz.h"
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static constexpr size_t kReservedBytes = 256;
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/**
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* The fuzzer will take in the bytes and divide into two parts.
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* original bytes : [... code bytes ... | 256 bytes]
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* The first part is codeBytes, the original bytes minus 256 bytes, which will be treated
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* as sksl code, intending to create SkRuntimeEffect.
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* For the second part, it will first reserve 256 bytes and then allocate bytes with same size
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* as effect->inputSize() to uniformBytes. The uniformBytes is intended to create makeShader().
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* Note that if uniformBytes->size() != effect->inputSize() the shader won't be created.
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*/
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bool FuzzSkRuntimeEffect(sk_sp<SkData> bytes) {
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if (bytes->size() < kReservedBytes) {
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return false;
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}
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sk_sp<SkData> codeBytes = SkData::MakeSubset(bytes.get(), 0, bytes->size() - kReservedBytes);
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SkRuntimeEffect::EffectResult tuple = SkRuntimeEffect::Make(
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SkString((const char*) codeBytes->data(), codeBytes->size())
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);
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SkRuntimeEffect* effect = std::get<0>(tuple).get();
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if (!effect || effect->inputSize() > kReservedBytes) { // if there is not enough uniform bytes
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return false;
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}
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sk_sp<SkData> uniformBytes = SkData::MakeSubset(bytes.get(), bytes->size() - kReservedBytes,
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effect->inputSize());
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auto shader = effect->makeShader(uniformBytes, nullptr, 0, nullptr, false);
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if (!shader) {
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return false;
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}
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SkPaint paint;
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paint.setShader(std::move(shader));
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sk_sp<SkSurface> s = SkSurface::MakeRasterN32Premul(128, 128);
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if (!s) {
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return false;
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}
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s->getCanvas()->drawPaint(paint);
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return true;
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}
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#if defined(IS_FUZZING_WITH_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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FuzzSkRuntimeEffect(bytes);
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return 0;
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}
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#endif
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