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Add SKSL fuzzer

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BUG=skia:5490
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2418763004

Review-Url: https://codereview.chromium.org/2418763004
This commit is contained in:
kjlubick 2016-10-18 10:06:24 -07:00 committed by Commit bot
parent 9488833428
commit e719577fe8
1 changed files with 48 additions and 16 deletions
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54
fuzz/fuzz.cpp
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@ -16,6 +16,7 @@
#include "SkPicture.h"
#include "SkPicture.h"
#include "SkPicture.h"
#include "SkSLCompiler.h"
#include "SkStream.h"
#include <cmath>
@ -39,6 +40,7 @@ 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 int fuzz_sksl2glsl(sk_sp<SkData>);
int main(int argc, char** argv) {
SkCommandLineFlags::Parse(argc, argv);
@ -53,22 +55,26 @@ int main(int argc, char** argv) {
uint8_t option = calculate_option(bytes.get());
if (!FLAGS_type.isEmpty()) {
switch (FLAGS_type[0][0]) {
case 'a': return fuzz_api(bytes);
case 'c': return fuzz_color_deserialize(bytes);
case 'i':
if (FLAGS_type[0][1] == 'c') { //icc
if (0 == strcmp("api", FLAGS_type[0])) {
return fuzz_api(bytes);
}
if (0 == strcmp("color_deserialize", FLAGS_type[0])) {
return fuzz_color_deserialize(bytes);
}
if (0 == strcmp("icc", FLAGS_type[0])) {
return fuzz_icc(bytes);
}
// We only allow one degree of freedom to avoid a search space explosion for afl-fuzz.
if (FLAGS_type[0][6] == 's') { // image_scale
if (0 == strcmp("image_scale", FLAGS_type[0])) {
return fuzz_img(bytes, option, 0);
}
// image_mode
if (0 == strcmp("image_mode", FLAGS_type[0])) {
return fuzz_img(bytes, 0, option);
case 's': return fuzz_skp(bytes);
}
if (0 == strcmp("skp", FLAGS_type[0])) {
return fuzz_skp(bytes);
}
if (0 == strcmp("sksl2glsl", FLAGS_type[0])) {
return fuzz_sksl2glsl(bytes);
}
}
return printUsage(argv[0]);
@ -400,6 +406,32 @@ int fuzz_color_deserialize(sk_sp<SkData> bytes) {
return 0;
}
static SkSL::GLCaps default_caps() {
return {
400,
SkSL::GLCaps::kGL_Standard,
false, // isCoreProfile
false, // usesPrecisionModifiers;
false, // mustDeclareFragmentShaderOutput
true, // canUseMinAndAbsTogether
false // mustForceNegatedAtanParamToFloat
};
}
int fuzz_sksl2glsl(sk_sp<SkData> bytes) {
SkSL::Compiler compiler;
std::string output;
bool result = compiler.toGLSL(SkSL::Program::kFragment_Kind,
(const char*)bytes->data(), default_caps(), &output);
if (!result) {
SkDebugf("[terminated] Couldn't compile input.\n");
return 1;
}
SkDebugf("[terminated] Success! Compiled input.\n");
return 0;
}
Fuzz::Fuzz(sk_sp<SkData> bytes) : fBytes(bytes), fNextByte(0) {}
void Fuzz::signalBug () { SkDebugf("Signal bug\n"); raise(SIGSEGV); }