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fix fuzz

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Extreme inputs trigger asserts intended for in range data.
Return an error without asserting unless the test signals
otherwise.

TBR=reed@google.com
BUG=630736
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2178923002

Review-Url: https://codereview.chromium.org/2178923002
This commit is contained in:
caryclark 2016-07-25 06:05:08 -07:00 committed by Commit bot
parent 05e3c39d93
commit 8bc90e2db6
4 changed files with 47 additions and 3 deletions
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2
src/pathops/SkOpCoincidence.cpp
View File

@ -448,7 +448,7 @@ bool SkOpCoincidence::addExpanded() {
: start->segment()->addExpanded(
startPtT->fT + startRange * oStartPart, oTest, &startOver);
if (!success) {
SkASSERT(0);
SkASSERT(fGlobalState->debugSkipAssert());
return false;
}
if (startOver) {

4
src/pathops/SkOpSegment.cpp
View File

@ -331,7 +331,9 @@ SkOpPtT* SkOpSegment::addT(double t, AliasMatch allowAlias, bool* allocated) {
}
return span->ptT();
}
SkASSERT(span != &fTail);
if (span == &fTail) {
return nullptr;
}
} while ((span = span->upCast()->next()));
SkASSERT(0);
return nullptr;

5
src/pathops/SkPathOpsCommon.cpp
View File

@ -513,7 +513,10 @@ bool HandleCoincidence(SkOpContourHead* contourList, SkOpCoincidence* coincidenc
#endif
DEBUG_COINCIDENCE_HEALTH(contourList, "expand2");
// the expanded ranges may not align -- add the missing spans
SkAssertResult(coincidence->addExpanded());
if (!coincidence->addExpanded()) {
SkASSERT(globalState->debugSkipAssert());
return false;
}
DEBUG_COINCIDENCE_HEALTH(contourList, "addExpanded3");
coincidence->correctEnds();
if (!coincidence->mark()) { // mark spans of coincident segments as coincident

39
tests/PathOpsOpTest.cpp
View File

@ -6627,7 +6627,46 @@ path.close();
testPathOpFailSkipAssert(reporter, path1, path2, (SkPathOp) 0, filename);
}
static void fuzz763_12(skiatest::Reporter* reporter, const char* filename) {
SkPath path;
path.setFillType((SkPath::FillType) 1);
path.moveTo(SkBits2Float(0x00000000), SkBits2Float(0x00000000)); // 0, 0
path.lineTo(SkBits2Float(0x00000000), SkBits2Float(0x6a29082a)); // 0, 5.10868e+25f
path.conicTo(SkBits2Float(0x6a295ac3), SkBits2Float(0x61bb988e), SkBits2Float(0x6829682d), SkBits2Float(0x5f3ba76a), SkBits2Float(0x42730a87)); // 5.11843e+25f, 4.32567e+20f, 3.20001e+24f, 1.35219e+19f, 60.7603f
path.conicTo(SkBits2Float(0x67aedf99), SkBits2Float(0x00000000), SkBits2Float(0x00000000), SkBits2Float(0x00000000), SkBits2Float(0x3f801112)); // 1.65163e+24f, 0, 0, 0, 1.00052f
path.close();
path.moveTo(SkBits2Float(0x00000000), SkBits2Float(0x00000000)); // 0, 0
path.conicTo(SkBits2Float(0x6a4b7bc0), SkBits2Float(0x00000000), SkBits2Float(0x00000000), SkBits2Float(0x68556829), SkBits2Float(0x555b2d29)); // 6.14991e+25f, 0, 0, 4.03114e+24f, 1.50617e+13f
path.lineTo(SkBits2Float(0x00000000), SkBits2Float(0x68555b2a)); // 0, 4.03018e+24f
path.cubicTo(SkBits2Float(0x00000000), SkBits2Float(0x67d55b2a), SkBits2Float(0x67296a4b), SkBits2Float(0x67555b2a), SkBits2Float(0x677e1f70), SkBits2Float(0x66d55b2a)); // 0, 2.01509e+24f, 8.00041e+23f, 1.00755e+24f, 1.20006e+24f, 5.03773e+23f
path.cubicTo(SkBits2Float(0x678f0684), SkBits2Float(0x6684f008), SkBits2Float(0x6798f8ea), SkBits2Float(0x6625a942), SkBits2Float(0x67961914), SkBits2Float(0x65ce709a)); // 1.35084e+24f, 3.1389e+23f, 1.44478e+24f, 1.95578e+23f, 1.41764e+24f, 1.21861e+23f
path.cubicTo(SkBits2Float(0x679158b0), SkBits2Float(0x00000000), SkBits2Float(0x67531e34), SkBits2Float(0x00000000), SkBits2Float(0x00000000), SkBits2Float(0x00000000)); // 1.37276e+24f, 0, 9.96976e+23f, 0, 0, 0
path.close();
SkPath path1(path);
path.reset();
path.setFillType((SkPath::FillType) 0);
path.moveTo(SkBits2Float(0x00000000), SkBits2Float(0x00000000)); // 0, 0
path.conicTo(SkBits2Float(0x21081f21), SkBits2Float(0x4b7bc003), SkBits2Float(0xed237a6a), SkBits2Float(0x2d682967), SkBits2Float(0x2a8c555b)); // 4.61198e-19f, 1.64987e+07f, -3.16213e+27f, 1.31969e-11f, 2.49282e-13f
path.lineTo(SkBits2Float(0x00000000), SkBits2Float(0x00000000)); // 0, 0
path.close();
path.moveTo(SkBits2Float(0x00000000), SkBits2Float(0x00000000)); // 0, 0
path.lineTo(SkBits2Float(0x3a6821df), SkBits2Float(0x2a8c3a8a)); // 0.000885514f, 2.49096e-13f
path.moveTo(SkBits2Float(0x29272a1d), SkBits2Float(0xb03a2a55)); // 3.7118e-14f, -6.77266e-10f
path.moveTo(SkBits2Float(0x20213b1e), SkBits2Float(0xc5272927)); // 1.36568e-19f, -2674.57f
path.quadTo(SkBits2Float(0xc422373b), SkBits2Float(0xec2a201f), SkBits2Float(0x21c25d27), SkBits2Float(0x523a7059)); // -648.863f, -8.22676e+26f, 1.31706e-18f, 2.00187e+11f
path.cubicTo(SkBits2Float(0x12102a10), SkBits2Float(0xe73a28d9), SkBits2Float(0xc8092763), SkBits2Float(0x2927b029), SkBits2Float(0x295b2d27), SkBits2Float(0x2d685568)); // 4.54902e-28f, -8.79114e+23f, -140446, 3.72342e-14f, 4.86669e-14f, 1.32066e-11f
path.moveTo(SkBits2Float(0x68556809), SkBits2Float(0x555b2d29)); // 4.03113e+24f, 1.50617e+13f
path.moveTo(SkBits2Float(0x1f2a212a), SkBits2Float(0x2d032108)); // 3.60263e-20f, 7.45382e-12f
path.moveTo(SkBits2Float(0x68556829), SkBits2Float(0x2a552d29)); // 4.03114e+24f, 1.89339e-13f
path.cubicTo(SkBits2Float(0x21295b2d), SkBits2Float(0x2a528c5b), SkBits2Float(0x284f5b2d), SkBits2Float(0x218aa621), SkBits2Float(0x3f2d2db3), SkBits2Float(0x68293a2a)); // 5.73801e-19f, 1.87004e-13f, 1.15106e-14f, 9.39522e-19f, 0.676479f, 3.19661e+24f
SkPath path2(path);
testPathOpFailSkipAssert(reporter, path1, path2, (SkPathOp) 0, filename);
}
static struct TestDesc failTests[] = {
TEST(fuzz763_12),
TEST(fuzz763_11),
TEST(fuzz763_10),
TEST(kfuzz2),