add svg fuzzer

Change-Id: I5c4c978c35462e41379939e92fb354dbb40606f8
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/295218
Reviewed-by: Kevin Lubick <kjlubick@google.com>
Commit-Queue: Zepeng Hu <zepenghu@google.com>

BUILD.gn

@@ -2006,6 +2006,7 @@ if (skia_enable_tools) {
       "fuzz/oss_fuzz/FuzzSKSL2Metal.cpp",
       "fuzz/oss_fuzz/FuzzSKSL2Pipeline.cpp",
       "fuzz/oss_fuzz/FuzzSKSL2SPIRV.cpp",
+      "fuzz/oss_fuzz/FuzzSVG.cpp",
       "fuzz/oss_fuzz/FuzzSkDescriptorDeserialize.cpp",
       "fuzz/oss_fuzz/FuzzTextBlobDeserialize.cpp",
       "tools/UrlDataManager.cpp",

fuzz/FuzzMain.cpp

@@ -58,6 +58,7 @@ static constexpr char g_type_message[] = "How to interpret --bytes, one of:\n"
                                          "skdescriptor_deserialize\n"
                                          "skp\n"
                                          "sksl2glsl\n"
+                                         "svg_dom\n"
                                          "sksl2metal\n"
                                          "sksl2pipeline\n"
                                          "sksl2spirv\n"
@@ -90,6 +91,7 @@ static void fuzz_sksl2glsl(sk_sp<SkData>);
 static void fuzz_sksl2metal(sk_sp<SkData>);
 static void fuzz_sksl2pipeline(sk_sp<SkData>);
 static void fuzz_sksl2spirv(sk_sp<SkData>);
+static void fuzz_svg_dom(sk_sp<SkData>);
 static void fuzz_textblob_deserialize(sk_sp<SkData>);
 
 static void print_api_names();
@@ -231,6 +233,10 @@ static int fuzz_file(SkString path, SkString type) {
         fuzz_sksl2pipeline(bytes);
         return 0;
     }
+    if (type.equals("svg_dom")) {
+        fuzz_svg_dom(bytes);
+        return 0;
+    }
     if (type.equals("textblob")) {
         fuzz_textblob_deserialize(bytes);
         return 0;
@@ -277,6 +283,7 @@ static std::map<std::string, std::string> cf_map = {
 #if defined(SK_ENABLE_SKOTTIE)
     {"skottie_json", "skottie_json"},
 #endif
+    {"svg_dom", "svg_dom"},
     {"textblob_deserialize", "textblob"}
 };
 
@@ -327,6 +334,12 @@ static void fuzz_skottie_json(sk_sp<SkData> bytes){
 }
 #endif
 
+void FuzzSVG(sk_sp<SkData> bytes);
+static void fuzz_svg_dom(sk_sp<SkData> bytes){
+    FuzzSVG(bytes);
+    SkDebugf("[terminated] Done DOM!\n");
+}
+
 // This adds up the first 1024 bytes and returns it as an 8 bit integer.  This allows afl-fuzz to
 // deterministically excercise different paths, or *options* (such as different scaling sizes or
 // different image modes) without needing to introduce a parameter.  This way we don't need a

fuzz/oss_fuzz/FuzzSVG.cpp

@@ -0,0 +1,40 @@
+/*
+ * Copyright 2020 Google, LLC
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include "experimental/svg/model/SkSVGDOM.h"
+#include "include/core/SkData.h"
+#include "include/core/SkStream.h"
+#include "include/core/SkSurface.h"
+
+void FuzzSVG(sk_sp<SkData> bytes) {
+    uint8_t w = 100;
+    uint8_t h = 200;
+
+    SkMemoryStream stream(bytes);
+    sk_sp<SkSVGDOM> dom = SkSVGDOM::MakeFromStream(stream);
+    if (!dom) {
+        return;
+    }
+
+    auto s = SkSurface::MakeRasterN32Premul(128, 128);
+    if (!s) {
+        return;
+    }
+    SkSize winSize = SkSize::Make(w, h);
+    dom->setContainerSize(winSize);
+    dom->containerSize();
+    dom->render(s->getCanvas());
+
+}
+
+#if defined(IS_FUZZING_WITH_LIBFUZZER)
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
+    auto bytes = SkData::MakeWithoutCopy(data, size);
+    FuzzSVG(bytes);
+    return 0;
+}
+#endif