Region Op Fuzzer
Also: assert Region IRects don't contain Sentinel value.
Also: Region fuzzer can't produce Sentinel value.
Change-Id: Ia33c7eeb9ef2c46b3da4a025d85de8a0406c3c0c
Reviewed-on: https://skia-review.googlesource.com/119011
Reviewed-by: Kevin Lubick <kjlubick@google.com>
Reviewed-by: Cary Clark <caryclark@google.com>
Commit-Queue: Hal Canary <halcanary@google.com>
diff --git a/BUILD.gn b/BUILD.gn
index 69ed2d4..a200f6a 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -1767,6 +1767,7 @@
"fuzz/FuzzParsePath.cpp",
"fuzz/FuzzPathMeasure.cpp",
"fuzz/FuzzPathop.cpp",
+ "fuzz/FuzzRegionOp.cpp",
"fuzz/fuzz.cpp",
"fuzz/oss_fuzz/FuzzAnimatedImage.cpp",
"fuzz/oss_fuzz/FuzzImage.cpp",
diff --git a/fuzz/FuzzCanvas.cpp b/fuzz/FuzzCanvas.cpp
index 150fb92..7cfcc13 100644
--- a/fuzz/FuzzCanvas.cpp
+++ b/fuzz/FuzzCanvas.cpp
@@ -76,12 +76,6 @@
// SkTextBlob with Unicode
// SkImage: more types
-template <typename T, typename Min, typename Max>
-inline void fuzz_enum_range(Fuzz* fuzz, T* value, Min rmin, Max rmax) {
- using U = skstd::underlying_type_t<T>;
- fuzz->nextRange((U*)value, (U)rmin, (U)rmax);
-}
-
// be careful: `foo(make_fuzz_t<T>(f), make_fuzz_t<U>(f))` is undefined.
// In fact, all make_fuzz_foo() functions have this potential problem.
// Use sequence points!
diff --git a/fuzz/FuzzCommon.h b/fuzz/FuzzCommon.h
index bea5a30..7615fe7 100644
--- a/fuzz/FuzzCommon.h
+++ b/fuzz/FuzzCommon.h
@@ -26,22 +26,34 @@
fuzz_nice_float(fuzz, rest...);
}
-template <>
-inline void Fuzz::next(SkRegion* region) {
+template <typename T, typename Min, typename Max>
+inline void fuzz_enum_range(Fuzz* fuzz, T* value, Min rmin, Max rmax) {
+ using U = skstd::underlying_type_t<T>;
+ fuzz->nextRange((U*)value, (U)rmin, (U)rmax);
+}
+
+inline void fuzz_region(Fuzz* fuzz, SkRegion* region, int maxN) {
uint8_t N;
- this->nextRange(&N, 0, 10);
+ fuzz->nextRange(&N, 0, maxN);
for (uint8_t i = 0; i < N; ++i) {
SkIRect r;
- uint8_t op;
- this->next(&r);
+ SkRegion::Op op;
+ // Avoid the sentinal value used by Region.
+ fuzz->nextRange(&r.fLeft, -2147483646, 2147483646);
+ fuzz->nextRange(&r.fTop, -2147483646, 2147483646);
+ fuzz->nextRange(&r.fRight, -2147483646, 2147483646);
+ fuzz->nextRange(&r.fBottom, -2147483646, 2147483646);
r.sort();
- this->nextRange(&op, 0, (uint8_t)SkRegion::kLastOp);
- if (!region->op(r, (SkRegion::Op)op)) {
+ fuzz_enum_range(fuzz, &op, (SkRegion::Op)0, SkRegion::kLastOp);
+ if (!region->op(r, op)) {
return;
}
}
}
+template <>
+inline void Fuzz::next(SkRegion* region) { fuzz_region(this, region, 10); }
+
// allows some float values for path points
void FuzzPath(Fuzz* fuzz, SkPath* path, int maxOps);
// allows all float values for path points
diff --git a/fuzz/FuzzRegionOp.cpp b/fuzz/FuzzRegionOp.cpp
new file mode 100644
index 0000000..7f8bbbe
--- /dev/null
+++ b/fuzz/FuzzRegionOp.cpp
@@ -0,0 +1,18 @@
+/*
+ * Copyright 2018 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include "Fuzz.h"
+#include "FuzzCommon.h"
+
+DEF_FUZZ(RegionOp, fuzz) { // `fuzz -t api -n RegionOp`
+ SkRegion regionA, regionB, regionC;
+ fuzz_region(fuzz, ®ionA, 2000);
+ fuzz_region(fuzz, ®ionB, 2000);
+ SkRegion::Op op;
+ fuzz_enum_range(fuzz, &op, (SkRegion::Op)0, SkRegion::kLastOp);
+ regionC.op(regionA, regionB, op);
+}
diff --git a/src/core/SkRegion.cpp b/src/core/SkRegion.cpp
index 8ba3167..204e354 100644
--- a/src/core/SkRegion.cpp
+++ b/src/core/SkRegion.cpp
@@ -145,6 +145,10 @@
return this->setEmpty();
}
this->freeRuns();
+ SkASSERT(r.left() != SkRegion::kRunTypeSentinel);
+ SkASSERT(r.top() != SkRegion::kRunTypeSentinel);
+ SkASSERT(r.right() != SkRegion::kRunTypeSentinel);
+ SkASSERT(r.bottom() != SkRegion::kRunTypeSentinel);
fBounds = r;
fRunHead = SkRegion_gRectRunHeadPtr;
return true;