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Be able to fuzz a directory of input

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BUG=skia:5878

Change-Id: I13552948c86a83f2384b83f59432c11779f305f1
Reviewed-on: https://skia-review.googlesource.com/6528
Reviewed-by: Mike Klein <mtklein@chromium.org>
Commit-Queue: Mike Klein <mtklein@chromium.org>
This commit is contained in:
Kevin Lubick 2017-01-06 08:26:56 -05:00 committed by Skia Commit-Bot
parent b38db9a48d
commit f80f115dd5
1 changed files with 70 additions and 50 deletions
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120
fuzz/fuzz.cpp
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@ -13,8 +13,8 @@
#include "SkImage.h"
#include "SkImageEncoder.h"
#include "SkMallocPixelRef.h"
#include "SkPicture.h"
#include "SkPicture.h"
#include "SkOSFile.h"
#include "SkOSPath.h"
#include "SkPicture.h"
#if SK_SUPPORT_GPU
#include "SkSLCompiler.h"
@ -25,65 +25,91 @@
#include "sk_tool_utils.h"
DEFINE_string2(bytes, b, "", "A path to a file. This can be the fuzz bytes or a binary to parse.");
DEFINE_string2(bytes, b, "", "A path to a file or a directory. If a file, the contents will be used as the fuzz bytes. If a directory, all files in the directory will be used as fuzz bytes for the fuzzer, one at a time.");
DEFINE_string2(name, n, "", "If --type is 'api', fuzz the API with this name.");
DEFINE_string2(type, t, "api", "How to interpret --bytes, either 'image_scale', 'image_mode', 'skp', 'icc', or 'api'.");
DEFINE_string2(dump, d, "", "If not empty, dump 'image*' or 'skp' types as a PNG with this name.");
static int printUsage(const char* name) {
SkDebugf("Usage: %s -t <type> -b <path/to/file> [-n api-to-fuzz]\n", name);
static int printUsage() {
SkDebugf("Usage: fuzz -t <type> -b <path/to/file> [-n api-to-fuzz]\n");
return 1;
}
static int fuzz_file(const char* path);
static uint8_t calculate_option(SkData*);
static int fuzz_api(sk_sp<SkData>);
static int fuzz_img(sk_sp<SkData>, uint8_t, uint8_t);
static int fuzz_skp(sk_sp<SkData>);
static int fuzz_icc(sk_sp<SkData>);
static int fuzz_color_deserialize(sk_sp<SkData>);
static void fuzz_api(sk_sp<SkData>);
static void fuzz_img(sk_sp<SkData>, uint8_t, uint8_t);
static void fuzz_skp(sk_sp<SkData>);
static void fuzz_icc(sk_sp<SkData>);
static void fuzz_color_deserialize(sk_sp<SkData>);
#if SK_SUPPORT_GPU
static int fuzz_sksl2glsl(sk_sp<SkData>);
static void fuzz_sksl2glsl(sk_sp<SkData>);
#endif
int main(int argc, char** argv) {
SkCommandLineFlags::Parse(argc, argv);
const char* path = FLAGS_bytes.isEmpty() ? argv[0] : FLAGS_bytes[0];
if (!sk_isdir(path)) {
return fuzz_file(path);
}
SkOSFile::Iter it(path);
for (SkString file; it.next(&file); ) {
SkString p = SkOSPath::Join(path, file.c_str());
SkDebugf("Fuzzing %s\n", p.c_str());
int rv = fuzz_file(p.c_str());
if (rv != 0) {
return rv;
}
}
return 0;
}
static int fuzz_file(const char* path) {
sk_sp<SkData> bytes(SkData::MakeFromFileName(path));
if (!bytes) {
SkDebugf("Could not read %s\n", path);
return 2;
return 1;
}
uint8_t option = calculate_option(bytes.get());
if (!FLAGS_type.isEmpty()) {
if (0 == strcmp("api", FLAGS_type[0])) {
return fuzz_api(bytes);
fuzz_api(bytes);
return 0;
}
if (0 == strcmp("color_deserialize", FLAGS_type[0])) {
return fuzz_color_deserialize(bytes);
fuzz_color_deserialize(bytes);
return 0;
}
if (0 == strcmp("icc", FLAGS_type[0])) {
return fuzz_icc(bytes);
fuzz_icc(bytes);
return 0;
}
if (0 == strcmp("image_scale", FLAGS_type[0])) {
return fuzz_img(bytes, option, 0);
fuzz_img(bytes, option, 0);
return 0;
}
if (0 == strcmp("image_mode", FLAGS_type[0])) {
return fuzz_img(bytes, 0, option);
fuzz_img(bytes, 0, option);
return 0;
}
if (0 == strcmp("skp", FLAGS_type[0])) {
return fuzz_skp(bytes);
fuzz_skp(bytes);
return 0;
}
#if SK_SUPPORT_GPU
if (0 == strcmp("sksl2glsl", FLAGS_type[0])) {
return fuzz_sksl2glsl(bytes);
fuzz_sksl2glsl(bytes);
return 0;
}
#endif
}
return printUsage(argv[0]);
return printUsage();
}
// This adds up the first 1024 bytes and returns it as an 8 bit integer. This allows afl-fuzz to
@ -100,7 +126,7 @@ static uint8_t calculate_option(SkData* bytes) {
return total;
}
int fuzz_api(sk_sp<SkData> bytes) {
static void fuzz_api(sk_sp<SkData> bytes) {
const char* name = FLAGS_name.isEmpty() ? "" : FLAGS_name[0];
for (auto r = SkTRegistry<Fuzzable>::Head(); r; r = r->next()) {
@ -110,7 +136,7 @@ int fuzz_api(sk_sp<SkData> bytes) {
Fuzz fuzz(bytes);
fuzzable.fn(&fuzz);
SkDebugf("[terminated] Success!\n");
return 0;
return;
}
}
@ -119,7 +145,6 @@ int fuzz_api(sk_sp<SkData> bytes) {
auto fuzzable = r->factory();
SkDebugf("\t%s\n", fuzzable.name);
}
return 1;
}
static void dump_png(SkBitmap bitmap) {
@ -129,7 +154,7 @@ static void dump_png(SkBitmap bitmap) {
}
}
int fuzz_img(sk_sp<SkData> bytes, uint8_t scale, uint8_t mode) {
static void fuzz_img(sk_sp<SkData> bytes, uint8_t scale, uint8_t mode) {
// We can scale 1x, 2x, 4x, 8x, 16x
scale = scale % 5;
float fscale = (float)pow(2.0f, scale);
@ -144,7 +169,7 @@ int fuzz_img(sk_sp<SkData> bytes, uint8_t scale, uint8_t mode) {
std::unique_ptr<SkCodec> codec(SkCodec::NewFromData(bytes));
if (nullptr == codec.get()) {
SkDebugf("[terminated] Couldn't create codec.\n");
return 3;
return;
}
SkImageInfo decodeInfo = codec->getInfo();
@ -177,7 +202,7 @@ int fuzz_img(sk_sp<SkData> bytes, uint8_t scale, uint8_t mode) {
if (!bitmap.tryAllocPixels(decodeInfo, &zeroFactory, colorTable.get())) {
SkDebugf("[terminated] Could not allocate memory. Image might be too large (%d x %d)",
decodeInfo.width(), decodeInfo.height());
return 4;
return;
}
switch (mode) {
@ -196,7 +221,7 @@ int fuzz_img(sk_sp<SkData> bytes, uint8_t scale, uint8_t mode) {
raise(SIGSEGV);
default:
SkDebugf("[terminated] Couldn't getPixels.\n");
return 6;
return;
}
break;
}
@ -204,7 +229,7 @@ int fuzz_img(sk_sp<SkData> bytes, uint8_t scale, uint8_t mode) {
if (SkCodec::kSuccess != codec->startScanlineDecode(decodeInfo, NULL, colorPtr,
colorCountPtr)) {
SkDebugf("[terminated] Could not start scanline decoder\n");
return 7;
return;
}
void* dst = bitmap.getAddr(0, 0);
@ -236,7 +261,7 @@ int fuzz_img(sk_sp<SkData> bytes, uint8_t scale, uint8_t mode) {
// Jpegs have kTopDown_SkScanlineOrder, and at this time, it is not interesting
// to run this test for image types that do not have this scanline ordering.
SkDebugf("[terminated] Could not start top-down scanline decoder\n");
return 8;
return;
}
for (int i = 0; i < numStripes; i += 2) {
@ -257,7 +282,7 @@ int fuzz_img(sk_sp<SkData> bytes, uint8_t scale, uint8_t mode) {
colorPtr, colorCountPtr);
if (SkCodec::kSuccess != startResult) {
SkDebugf("[terminated] Failed to restart scanline decoder with same parameters.\n");
return 9;
return;
}
for (int i = 0; i < numStripes; i += 2) {
// Read a stripe
@ -283,7 +308,7 @@ int fuzz_img(sk_sp<SkData> bytes, uint8_t scale, uint8_t mode) {
if (divisor > W || divisor > H) {
SkDebugf("[terminated] Cannot codec subset: divisor %d is too big "
"with dimensions (%d x %d)\n", divisor, W, H);
return 10;
return;
}
// subset dimensions
// SkWebpCodec, the only one that supports subsets, requires even top/left boundaries.
@ -316,7 +341,7 @@ int fuzz_img(sk_sp<SkData> bytes, uint8_t scale, uint8_t mode) {
if (!subsetBm.installPixels(decodeInfo, pixels, rowBytes, colorTable.get(),
nullptr, nullptr)) {
SkDebugf("[terminated] Could not install pixels.\n");
return 11;
return;
}
const SkCodec::Result result = codec->getPixels(decodeInfo, pixels, rowBytes,
&opts, colorPtr, colorCountPtr);
@ -329,7 +354,7 @@ int fuzz_img(sk_sp<SkData> bytes, uint8_t scale, uint8_t mode) {
if (0 == (x|y)) {
// First subset is okay to return unimplemented.
SkDebugf("[terminated] Incompatible colortype conversion\n");
return 12;
return;
}
// If the first subset succeeded, a later one should not fail.
// fall through to failure
@ -337,7 +362,7 @@ int fuzz_img(sk_sp<SkData> bytes, uint8_t scale, uint8_t mode) {
if (0 == (x|y)) {
// First subset is okay to return unimplemented.
SkDebugf("[terminated] subset codec not supported\n");
return 13;
return;
}
// If the first subset succeeded, why would a later one fail?
// fall through to failure
@ -346,7 +371,7 @@ int fuzz_img(sk_sp<SkData> bytes, uint8_t scale, uint8_t mode) {
"with dimensions (%d x %d)\t error %d\n",
x, y, decodeInfo.width(), decodeInfo.height(),
W, H, result);
return 14;
return;
}
// translate by the scaled height.
top += decodeInfo.height();
@ -371,7 +396,7 @@ int fuzz_img(sk_sp<SkData> bytes, uint8_t scale, uint8_t mode) {
if (SkCodec::kSuccess != result) {
SkDebugf("[terminated] failed to start incremental decode "
"in frame %d with error %d\n", i, result);
return 15;
return;
}
result = codec->incrementalDecode();
@ -385,7 +410,7 @@ int fuzz_img(sk_sp<SkData> bytes, uint8_t scale, uint8_t mode) {
} else {
SkDebugf("[terminated] incremental decode failed with "
"error %d\n", result);
return 16;
return;
}
}
SkDebugf("[terminated] Success!\n");
@ -396,16 +421,15 @@ int fuzz_img(sk_sp<SkData> bytes, uint8_t scale, uint8_t mode) {
}
dump_png(bitmap);
return 0;
}
int fuzz_skp(sk_sp<SkData> bytes) {
static void fuzz_skp(sk_sp<SkData> bytes) {
SkMemoryStream stream(bytes);
SkDebugf("Decoding\n");
sk_sp<SkPicture> pic(SkPicture::MakeFromStream(&stream));
if (!pic) {
SkDebugf("[terminated] Couldn't decode as a picture.\n");
return 3;
return;
}
SkDebugf("Rendering\n");
SkBitmap bitmap;
@ -417,31 +441,28 @@ int fuzz_skp(sk_sp<SkData> bytes) {
canvas.drawPicture(pic);
SkDebugf("[terminated] Success! Decoded and rendered an SkPicture!\n");
dump_png(bitmap);
return 0;
}
int fuzz_icc(sk_sp<SkData> bytes) {
static void fuzz_icc(sk_sp<SkData> bytes) {
sk_sp<SkColorSpace> space(SkColorSpace::MakeICC(bytes->data(), bytes->size()));
if (!space) {
SkDebugf("[terminated] Couldn't decode ICC.\n");
return 1;
return;
}
SkDebugf("[terminated] Success! Decoded ICC.\n");
return 0;
}
int fuzz_color_deserialize(sk_sp<SkData> bytes) {
static void fuzz_color_deserialize(sk_sp<SkData> bytes) {
sk_sp<SkColorSpace> space(SkColorSpace::Deserialize(bytes->data(), bytes->size()));
if (!space) {
SkDebugf("[terminated] Couldn't deserialize Colorspace.\n");
return 1;
return;
}
SkDebugf("[terminated] Success! deserialized Colorspace.\n");
return 0;
}
#if SK_SUPPORT_GPU
int fuzz_sksl2glsl(sk_sp<SkData> bytes) {
static void fuzz_sksl2glsl(sk_sp<SkData> bytes) {
SkSL::Compiler compiler;
SkString output;
SkSL::Program::Settings settings;
@ -452,10 +473,9 @@ int fuzz_sksl2glsl(sk_sp<SkData> bytes) {
settings);
if (!program || !compiler.toGLSL(*program, &output)) {
SkDebugf("[terminated] Couldn't compile input.\n");
return 1;
return;
}
SkDebugf("[terminated] Success! Compiled input.\n");
return 0;
}
#endif