e8e4a3e678
This reverts commit ce33f10677
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Reason for revert: Breaking many gpu bots
Change-Id: I94c813ed6a9311458c872f74bb1b0792f46ff414
Reviewed-on: https://skia-review.googlesource.com/5737
Commit-Queue: Greg Daniel <egdaniel@google.com>
Reviewed-by: Greg Daniel <egdaniel@google.com>
468 lines
18 KiB
C++
468 lines
18 KiB
C++
/*
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* Copyright 2016 Google Inc.
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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 "Fuzz.h"
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#include "SkCanvas.h"
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#include "SkCodec.h"
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#include "SkCommandLineFlags.h"
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#include "SkData.h"
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#include "SkImage.h"
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#include "SkImageEncoder.h"
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#include "SkMallocPixelRef.h"
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#include "SkPicture.h"
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#include "SkPicture.h"
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#include "SkPicture.h"
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#if SK_SUPPORT_GPU
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#include "SkSLCompiler.h"
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#endif
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#include "SkStream.h"
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#include <signal.h>
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#include "sk_tool_utils.h"
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DEFINE_string2(bytes, b, "", "A path to a file. This can be the fuzz bytes or a binary to parse.");
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DEFINE_string2(name, n, "", "If --type is 'api', fuzz the API with this name.");
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DEFINE_string2(type, t, "api", "How to interpret --bytes, either 'image_scale', 'image_mode', 'skp', 'icc', or 'api'.");
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DEFINE_string2(dump, d, "", "If not empty, dump 'image*' or 'skp' types as a PNG with this name.");
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static int printUsage(const char* name) {
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SkDebugf("Usage: %s -t <type> -b <path/to/file> [-n api-to-fuzz]\n", name);
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return 1;
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}
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static uint8_t calculate_option(SkData*);
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static int fuzz_api(sk_sp<SkData>);
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static int fuzz_img(sk_sp<SkData>, uint8_t, uint8_t);
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static int fuzz_skp(sk_sp<SkData>);
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static int fuzz_icc(sk_sp<SkData>);
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static int fuzz_color_deserialize(sk_sp<SkData>);
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#if SK_SUPPORT_GPU
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static int fuzz_sksl2glsl(sk_sp<SkData>);
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#endif
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int main(int argc, char** argv) {
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SkCommandLineFlags::Parse(argc, argv);
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const char* path = FLAGS_bytes.isEmpty() ? argv[0] : FLAGS_bytes[0];
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sk_sp<SkData> bytes(SkData::MakeFromFileName(path));
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if (!bytes) {
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SkDebugf("Could not read %s\n", path);
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return 2;
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}
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uint8_t option = calculate_option(bytes.get());
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if (!FLAGS_type.isEmpty()) {
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if (0 == strcmp("api", FLAGS_type[0])) {
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return fuzz_api(bytes);
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}
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if (0 == strcmp("color_deserialize", FLAGS_type[0])) {
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return fuzz_color_deserialize(bytes);
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}
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if (0 == strcmp("icc", FLAGS_type[0])) {
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return fuzz_icc(bytes);
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}
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if (0 == strcmp("image_scale", FLAGS_type[0])) {
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return fuzz_img(bytes, option, 0);
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}
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if (0 == strcmp("image_mode", FLAGS_type[0])) {
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return fuzz_img(bytes, 0, option);
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}
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if (0 == strcmp("skp", FLAGS_type[0])) {
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return fuzz_skp(bytes);
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}
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#if SK_SUPPORT_GPU
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if (0 == strcmp("sksl2glsl", FLAGS_type[0])) {
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return fuzz_sksl2glsl(bytes);
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}
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#endif
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}
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return printUsage(argv[0]);
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}
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// This adds up the first 1024 bytes and returns it as an 8 bit integer. This allows afl-fuzz to
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// deterministically excercise different paths, or *options* (such as different scaling sizes or
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// different image modes) without needing to introduce a parameter. This way we don't need a
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// image_scale1, image_scale2, image_scale4, etc fuzzer, we can just have a image_scale fuzzer.
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// Clients are expected to transform this number into a different range, e.g. with modulo (%).
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static uint8_t calculate_option(SkData* bytes) {
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uint8_t total = 0;
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const uint8_t* data = bytes->bytes();
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for (size_t i = 0; i < 1024 && i < bytes->size(); i++) {
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total += data[i];
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}
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return total;
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}
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int fuzz_api(sk_sp<SkData> bytes) {
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const char* name = FLAGS_name.isEmpty() ? "" : FLAGS_name[0];
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for (auto r = SkTRegistry<Fuzzable>::Head(); r; r = r->next()) {
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auto fuzzable = r->factory();
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if (0 == strcmp(name, fuzzable.name)) {
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SkDebugf("Fuzzing %s...\n", fuzzable.name);
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Fuzz fuzz(bytes);
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fuzzable.fn(&fuzz);
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SkDebugf("[terminated] Success!\n");
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return 0;
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}
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}
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SkDebugf("When using --type api, please choose an API to fuzz with --name/-n:\n");
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for (auto r = SkTRegistry<Fuzzable>::Head(); r; r = r->next()) {
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auto fuzzable = r->factory();
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SkDebugf("\t%s\n", fuzzable.name);
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}
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return 1;
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}
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static void dump_png(SkBitmap bitmap) {
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if (!FLAGS_dump.isEmpty()) {
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sk_tool_utils::EncodeImageToFile(FLAGS_dump[0], bitmap, SkEncodedImageFormat::kPNG, 100);
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SkDebugf("Dumped to %s\n", FLAGS_dump[0]);
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}
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}
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int fuzz_img(sk_sp<SkData> bytes, uint8_t scale, uint8_t mode) {
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// We can scale 1x, 2x, 4x, 8x, 16x
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scale = scale % 5;
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float fscale = (float)pow(2.0f, scale);
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SkDebugf("Scaling factor: %f\n", fscale);
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// We have 5 different modes of decoding.
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mode = mode % 5;
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SkDebugf("Mode: %d\n", mode);
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// This is mostly copied from DMSrcSink's CodecSrc::draw method.
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SkDebugf("Decoding\n");
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std::unique_ptr<SkCodec> codec(SkCodec::NewFromData(bytes));
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if (nullptr == codec.get()) {
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SkDebugf("[terminated] Couldn't create codec.\n");
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return 3;
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}
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SkImageInfo decodeInfo = codec->getInfo();
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if (4 == mode && decodeInfo.colorType() == kIndex_8_SkColorType) {
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// 4 means animated. Frames beyond the first cannot be decoded to
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// index 8.
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decodeInfo = decodeInfo.makeColorType(kN32_SkColorType);
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}
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SkISize size = codec->getScaledDimensions(fscale);
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decodeInfo = decodeInfo.makeWH(size.width(), size.height());
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// Construct a color table for the decode if necessary
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sk_sp<SkColorTable> colorTable(nullptr);
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SkPMColor* colorPtr = nullptr;
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int* colorCountPtr = nullptr;
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int maxColors = 256;
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if (kIndex_8_SkColorType == decodeInfo.colorType()) {
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SkPMColor colors[256];
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colorTable.reset(new SkColorTable(colors, maxColors));
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colorPtr = const_cast<SkPMColor*>(colorTable->readColors());
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colorCountPtr = &maxColors;
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}
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SkBitmap bitmap;
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SkMallocPixelRef::ZeroedPRFactory zeroFactory;
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SkCodec::Options options;
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options.fZeroInitialized = SkCodec::kYes_ZeroInitialized;
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if (!bitmap.tryAllocPixels(decodeInfo, &zeroFactory, colorTable.get())) {
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SkDebugf("[terminated] Could not allocate memory. Image might be too large (%d x %d)",
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decodeInfo.width(), decodeInfo.height());
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return 4;
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}
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switch (mode) {
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case 0: {//kCodecZeroInit_Mode, kCodec_Mode
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switch (codec->getPixels(decodeInfo, bitmap.getPixels(), bitmap.rowBytes(), &options,
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colorPtr, colorCountPtr)) {
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case SkCodec::kSuccess:
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SkDebugf("[terminated] Success!\n");
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break;
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case SkCodec::kIncompleteInput:
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SkDebugf("[terminated] Partial Success\n");
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break;
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case SkCodec::kInvalidConversion:
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SkDebugf("Incompatible colortype conversion\n");
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// Crash to allow afl-fuzz to know this was a bug.
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raise(SIGSEGV);
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default:
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SkDebugf("[terminated] Couldn't getPixels.\n");
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return 6;
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}
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break;
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}
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case 1: {//kScanline_Mode
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if (SkCodec::kSuccess != codec->startScanlineDecode(decodeInfo, NULL, colorPtr,
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colorCountPtr)) {
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SkDebugf("[terminated] Could not start scanline decoder\n");
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return 7;
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}
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void* dst = bitmap.getAddr(0, 0);
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size_t rowBytes = bitmap.rowBytes();
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uint32_t height = decodeInfo.height();
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switch (codec->getScanlineOrder()) {
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case SkCodec::kTopDown_SkScanlineOrder:
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case SkCodec::kBottomUp_SkScanlineOrder:
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// We do not need to check the return value. On an incomplete
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// image, memory will be filled with a default value.
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codec->getScanlines(dst, height, rowBytes);
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break;
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}
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SkDebugf("[terminated] Success!\n");
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break;
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}
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case 2: { //kStripe_Mode
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const int height = decodeInfo.height();
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// This value is chosen arbitrarily. We exercise more cases by choosing a value that
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// does not align with image blocks.
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const int stripeHeight = 37;
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const int numStripes = (height + stripeHeight - 1) / stripeHeight;
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// Decode odd stripes
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if (SkCodec::kSuccess != codec->startScanlineDecode(decodeInfo, NULL, colorPtr,
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colorCountPtr)
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|| SkCodec::kTopDown_SkScanlineOrder != codec->getScanlineOrder()) {
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// This mode was designed to test the new skip scanlines API in libjpeg-turbo.
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// Jpegs have kTopDown_SkScanlineOrder, and at this time, it is not interesting
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// to run this test for image types that do not have this scanline ordering.
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SkDebugf("[terminated] Could not start top-down scanline decoder\n");
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return 8;
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}
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for (int i = 0; i < numStripes; i += 2) {
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// Skip a stripe
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const int linesToSkip = SkTMin(stripeHeight, height - i * stripeHeight);
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codec->skipScanlines(linesToSkip);
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// Read a stripe
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const int startY = (i + 1) * stripeHeight;
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const int linesToRead = SkTMin(stripeHeight, height - startY);
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if (linesToRead > 0) {
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codec->getScanlines(bitmap.getAddr(0, startY), linesToRead, bitmap.rowBytes());
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}
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}
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// Decode even stripes
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const SkCodec::Result startResult = codec->startScanlineDecode(decodeInfo, nullptr,
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colorPtr, colorCountPtr);
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if (SkCodec::kSuccess != startResult) {
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SkDebugf("[terminated] Failed to restart scanline decoder with same parameters.\n");
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return 9;
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}
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for (int i = 0; i < numStripes; i += 2) {
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// Read a stripe
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const int startY = i * stripeHeight;
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const int linesToRead = SkTMin(stripeHeight, height - startY);
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codec->getScanlines(bitmap.getAddr(0, startY), linesToRead, bitmap.rowBytes());
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// Skip a stripe
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const int linesToSkip = SkTMin(stripeHeight, height - (i + 1) * stripeHeight);
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if (linesToSkip > 0) {
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codec->skipScanlines(linesToSkip);
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}
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}
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SkDebugf("[terminated] Success!\n");
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break;
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}
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case 3: { //kSubset_Mode
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// Arbitrarily choose a divisor.
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int divisor = 2;
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// Total width/height of the image.
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const int W = codec->getInfo().width();
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const int H = codec->getInfo().height();
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if (divisor > W || divisor > H) {
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SkDebugf("[terminated] Cannot codec subset: divisor %d is too big "
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"with dimensions (%d x %d)\n", divisor, W, H);
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return 10;
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}
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// subset dimensions
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// SkWebpCodec, the only one that supports subsets, requires even top/left boundaries.
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const int w = SkAlign2(W / divisor);
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const int h = SkAlign2(H / divisor);
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SkIRect subset;
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SkCodec::Options opts;
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opts.fSubset = ⊂
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SkBitmap subsetBm;
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// We will reuse pixel memory from bitmap.
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void* pixels = bitmap.getPixels();
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// Keep track of left and top (for drawing subsetBm into canvas). We could use
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// fscale * x and fscale * y, but we want integers such that the next subset will start
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// where the last one ended. So we'll add decodeInfo.width() and height().
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int left = 0;
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for (int x = 0; x < W; x += w) {
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int top = 0;
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for (int y = 0; y < H; y+= h) {
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// Do not make the subset go off the edge of the image.
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const int preScaleW = SkTMin(w, W - x);
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const int preScaleH = SkTMin(h, H - y);
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subset.setXYWH(x, y, preScaleW, preScaleH);
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// And fscale
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// FIXME: Should we have a version of getScaledDimensions that takes a subset
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// into account?
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decodeInfo = decodeInfo.makeWH(
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SkTMax(1, SkScalarRoundToInt(preScaleW * fscale)),
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SkTMax(1, SkScalarRoundToInt(preScaleH * fscale)));
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size_t rowBytes = decodeInfo.minRowBytes();
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if (!subsetBm.installPixels(decodeInfo, pixels, rowBytes, colorTable.get(),
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nullptr, nullptr)) {
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SkDebugf("[terminated] Could not install pixels.\n");
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return 11;
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}
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const SkCodec::Result result = codec->getPixels(decodeInfo, pixels, rowBytes,
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&opts, colorPtr, colorCountPtr);
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switch (result) {
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case SkCodec::kSuccess:
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case SkCodec::kIncompleteInput:
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SkDebugf("okay\n");
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break;
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case SkCodec::kInvalidConversion:
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if (0 == (x|y)) {
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// First subset is okay to return unimplemented.
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SkDebugf("[terminated] Incompatible colortype conversion\n");
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return 12;
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}
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// If the first subset succeeded, a later one should not fail.
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// fall through to failure
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case SkCodec::kUnimplemented:
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if (0 == (x|y)) {
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// First subset is okay to return unimplemented.
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SkDebugf("[terminated] subset codec not supported\n");
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return 13;
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}
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// If the first subset succeeded, why would a later one fail?
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// fall through to failure
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default:
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SkDebugf("[terminated] subset codec failed to decode (%d, %d, %d, %d) "
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"with dimensions (%d x %d)\t error %d\n",
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x, y, decodeInfo.width(), decodeInfo.height(),
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W, H, result);
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return 14;
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}
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// translate by the scaled height.
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top += decodeInfo.height();
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}
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// translate by the scaled width.
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left += decodeInfo.width();
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}
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SkDebugf("[terminated] Success!\n");
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break;
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}
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case 4: { //kAnimated_Mode
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std::vector<SkCodec::FrameInfo> frameInfos = codec->getFrameInfo();
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if (frameInfos.size() == 0) {
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SkDebugf("[terminated] Not an animated image\n");
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break;
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}
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for (size_t i = 0; i < frameInfos.size(); i++) {
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options.fFrameIndex = i;
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auto result = codec->startIncrementalDecode(decodeInfo, bitmap.getPixels(),
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bitmap.rowBytes(), &options);
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if (SkCodec::kSuccess != result) {
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SkDebugf("[terminated] failed to start incremental decode "
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"in frame %d with error %d\n", i, result);
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return 15;
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}
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result = codec->incrementalDecode();
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if (result == SkCodec::kIncompleteInput) {
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SkDebugf("okay\n");
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// Frames beyond this one will not decode.
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break;
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}
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if (result == SkCodec::kSuccess) {
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SkDebugf("okay - decoded frame %d\n", i);
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} else {
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SkDebugf("[terminated] incremental decode failed with "
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"error %d\n", result);
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return 16;
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}
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}
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SkDebugf("[terminated] Success!\n");
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break;
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}
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default:
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SkDebugf("[terminated] Mode not implemented yet\n");
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}
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dump_png(bitmap);
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return 0;
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}
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int fuzz_skp(sk_sp<SkData> bytes) {
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SkMemoryStream stream(bytes);
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SkDebugf("Decoding\n");
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sk_sp<SkPicture> pic(SkPicture::MakeFromStream(&stream));
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if (!pic) {
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SkDebugf("[terminated] Couldn't decode as a picture.\n");
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return 3;
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}
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SkDebugf("Rendering\n");
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SkBitmap bitmap;
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if (!FLAGS_dump.isEmpty()) {
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SkIRect size = pic->cullRect().roundOut();
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bitmap.allocN32Pixels(size.width(), size.height());
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}
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SkCanvas canvas(bitmap);
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canvas.drawPicture(pic);
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SkDebugf("[terminated] Success! Decoded and rendered an SkPicture!\n");
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dump_png(bitmap);
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return 0;
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}
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int fuzz_icc(sk_sp<SkData> bytes) {
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sk_sp<SkColorSpace> space(SkColorSpace::MakeICC(bytes->data(), bytes->size()));
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if (!space) {
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SkDebugf("[terminated] Couldn't decode ICC.\n");
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return 1;
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}
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SkDebugf("[terminated] Success! Decoded ICC.\n");
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return 0;
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}
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int fuzz_color_deserialize(sk_sp<SkData> bytes) {
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sk_sp<SkColorSpace> space(SkColorSpace::Deserialize(bytes->data(), bytes->size()));
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if (!space) {
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SkDebugf("[terminated] Couldn't deserialize Colorspace.\n");
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return 1;
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}
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SkDebugf("[terminated] Success! deserialized Colorspace.\n");
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return 0;
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}
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#if SK_SUPPORT_GPU
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int fuzz_sksl2glsl(sk_sp<SkData> bytes) {
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SkSL::Compiler compiler;
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SkString output;
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bool result = compiler.toGLSL(SkSL::Program::kFragment_Kind,
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SkString((const char*)bytes->data()), *SkSL::ShaderCapsFactory::Default(), &output);
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if (!result) {
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SkDebugf("[terminated] Couldn't compile input.\n");
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return 1;
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}
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SkDebugf("[terminated] Success! Compiled input.\n");
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return 0;
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}
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#endif
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Fuzz::Fuzz(sk_sp<SkData> bytes) : fBytes(bytes), fNextByte(0) {}
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void Fuzz::signalBug() { SkDebugf("Signal bug\n"); raise(SIGSEGV); }
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size_t Fuzz::size() { return fBytes->size(); }
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bool Fuzz::exhausted() {
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return fBytes->size() == fNextByte;
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}
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