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This commit is contained in:
Bhargava Shastry 2019-08-02 17:01:41 +02:00
parent 12f54b55a2
commit 1735a82199
2 changed files with 50 additions and 28 deletions
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30
test/tools/ossfuzz/protoToAbiV2.cpp
View File

@ -388,11 +388,14 @@ void ProtoConverter::visit(StructType const&)
{
}
std::string ProtoConverter::arrayDimInfoAsString(ArrayDimensionInfo const& _x)
std::string ProtoConverter::arrayDimInfoAsString(
ArrayDimensionInfo const& _x,
unsigned _numDimensions
)
{
return Whiskers(R"([<?isStatic><length></isStatic>])")
("isStatic", _x.is_static())
("length", std::to_string(getStaticArrayLengthFromFuzz(_x.length())))
("length", std::to_string(getStaticArrayLengthFromFuzz(_x.length(), _numDimensions)))
.render();
}
@ -402,7 +405,7 @@ void ProtoConverter::arrayDimensionsAsStringVector(
{
solAssert(_x.info_size() > 0, "Proto ABIv2 Fuzzer: Array dimensions empty.");
for (auto const& dim: _x.info())
_vecOfStr.push_back(arrayDimInfoAsString(dim));
_vecOfStr.push_back(arrayDimInfoAsString(dim, _x.info_size()));
}
ProtoConverter::VecOfBoolUnsigned ProtoConverter::arrayDimensionsAsPairVector(
@ -411,7 +414,7 @@ ProtoConverter::VecOfBoolUnsigned ProtoConverter::arrayDimensionsAsPairVector(
{
VecOfBoolUnsigned arrayDimsPairVector = {};
for (auto const& dim: _x.info())
arrayDimsPairVector.push_back(arrayDimInfoAsPair(dim));
arrayDimsPairVector.push_back(arrayDimInfoAsPair(dim, _x.info_size()));
solAssert(!arrayDimsPairVector.empty(), "Proto ABIv2 Fuzzer: Array dimensions empty.");
return arrayDimsPairVector;
}
@ -467,7 +470,8 @@ unsigned ProtoConverter::resizeDimension(
unsigned _arrayLen,
std::string const& _var,
std::string const& _param,
std::string const& _type
std::string const& _type,
unsigned _numDimensions
)
{
unsigned length;
@ -475,7 +479,7 @@ unsigned ProtoConverter::resizeDimension(
length = _arrayLen;
else
{
length = getDynArrayLengthFromFuzz(_arrayLen, getNextCounter());
length = getDynArrayLengthFromFuzz(_arrayLen, getNextCounter(), _numDimensions);
// If local var, new T(l);
// Else, l;
@ -501,7 +505,7 @@ unsigned ProtoConverter::resizeDimension(
}
// Add checks on array length pseudo randomly
if (addCheck(getNextCounter()))
if (addCheck(getNextCounter(), _numDimensions))
// if (c.length != l)
checkResizeOp(_param, length);
return length;
@ -512,7 +516,8 @@ void ProtoConverter::resizeHelper(
std::vector<std::string> _arrStrVec,
VecOfBoolUnsigned _arrInfoVec,
std::string const& _varName,
std::string const& _paramName
std::string const& _paramName,
unsigned _numDimensions
)
{
// Initialize value expressions if we have arrived at leaf node,
@ -523,7 +528,7 @@ void ProtoConverter::resizeHelper(
// To ensure we do not create a very large test case
// especially for multidimensional dynamic arrays,
// we create a checked assignment pseudo randomly.
if (addCheck(getNextCounter()))
if (addCheck(getNextCounter(), _numDimensions))
{
// expression name is _var
// value is a value of base type
@ -542,7 +547,7 @@ void ProtoConverter::resizeHelper(
_arrStrVec.end(),
std::string("")
);
unsigned length = resizeDimension(dim.first, dim.second, _varName, _paramName, type);
unsigned length = resizeDimension(dim.first, dim.second, _varName, _paramName, type, _numDimensions);
// Recurse one level dimension down.
_arrStrVec.pop_back();
_arrInfoVec.pop_back();
@ -552,7 +557,8 @@ void ProtoConverter::resizeHelper(
_arrStrVec,
_arrInfoVec,
_varName + "[" + std::to_string(i) + "]",
_paramName + "[" + std::to_string(i) + "]"
_paramName + "[" + std::to_string(i) + "]",
_numDimensions
);
}
}
@ -569,7 +575,7 @@ void ProtoConverter::resizeInitArray(
VecOfBoolUnsigned arrInfoVec = arrayDimensionsAsPairVector(_x);
std::vector<std::string> arrStrVec = {_baseType};
arrayDimensionsAsStringVector(_x, arrStrVec);
resizeHelper(_x, arrStrVec, arrInfoVec, _varName, _paramName);
resizeHelper(_x, arrStrVec, arrInfoVec, _varName, _paramName, arrInfoVec.size());
}
// Returns array type from it's base type (e.g., int8) and array dimensions info contained in

46
test/tools/ossfuzz/protoToAbiV2.h
View File

@ -174,7 +174,8 @@ private:
unsigned _arrayLen,
std::string const& _var,
std::string const& _param,
std::string const& _type
std::string const& _type,
unsigned _numDimensions
);
void resizeHelper(
@ -182,7 +183,8 @@ private:
std::vector<std::string> _arrStrVec,
VecOfBoolUnsigned _arrInfoVec,
std::string const& _varName,
std::string const& _paramName
std::string const& _paramName,
unsigned _numDimensions
);
// Utility functions
@ -293,7 +295,7 @@ private:
bool _isHexLiteral
);
static std::vector<std::pair<bool, unsigned>> arrayDimensionsAsPairVector(ArrayType const& _x);
static std::string arrayDimInfoAsString(ArrayDimensionInfo const& _x);
static std::string arrayDimInfoAsString(ArrayDimensionInfo const& _x, unsigned _numDimensions);
static void arrayDimensionsAsStringVector(
ArrayType const& _x,
std::vector<std::string>&
@ -371,25 +373,40 @@ private:
/// Dynamically sized arrays can have a length of at least zero
/// and at most s_maxArrayLength.
static unsigned getDynArrayLengthFromFuzz(unsigned _fuzz, unsigned _counter)
static unsigned getDynArrayLengthFromFuzz(
unsigned _fuzz,
unsigned _counter,
unsigned _numDimensions
)
{
// Zero length dimension is more likely when the total
// number of dimensions is high.
return (
_fuzz % _numDimensions != 0 ?
0 :
// Increment modulo value by one in order to meet upper bound
return (_fuzz + _counter) % (s_maxArrayLength + 1);
(_fuzz + _counter) % (s_maxArrayLength + 1)
);
}
/// Statically sized arrays must have a length of at least one
/// and at most s_maxArrayLength.
static unsigned getStaticArrayLengthFromFuzz(unsigned _fuzz)
static unsigned getStaticArrayLengthFromFuzz(unsigned _fuzz, unsigned _numDimensions)
{
return _fuzz % s_maxArrayLength + 1;
// Unit length dimension is more likely when the total
// number of dimensions is high.
return (_fuzz % _numDimensions != 0 ? 1 : _fuzz % s_maxArrayLength + 1);
}
static std::pair<bool, unsigned> arrayDimInfoAsPair(ArrayDimensionInfo const& _x)
static std::pair<bool, unsigned> arrayDimInfoAsPair(
ArrayDimensionInfo const& _x,
unsigned _numDimensions
)
{
return (
_x.is_static() ?
std::make_pair(true, getStaticArrayLengthFromFuzz(_x.length())) :
std::make_pair(false, getDynArrayLengthFromFuzz(_x.length(), 0))
std::make_pair(true, getStaticArrayLengthFromFuzz(_x.length(), _numDimensions)) :
std::make_pair(false, getDynArrayLengthFromFuzz(_x.length(), 0, _numDimensions))
);
}
@ -413,10 +430,12 @@ private:
_counter,
_isHexLiteral
);
}
static bool addCheck(unsigned _counter)
/// Checks are less likely for higher dimensional arrays
static bool addCheck(unsigned _counter, unsigned _numDimensions)
{
return _counter % s_arrayCheckFrequency == 0;
return _counter % _numDimensions == 0;
}
/// Contains the test program
@ -438,9 +457,6 @@ private:
static unsigned constexpr s_maxArrayLength = 4;
static unsigned constexpr s_maxArrayDimensions = 4;
static unsigned constexpr s_maxDynArrayLength = 256;
/// Add check only if counter returned by getNextCounter()
/// is divisible by s_arrayCheckFrequency
static unsigned constexpr s_arrayCheckFrequency = 11;
/// Prefixes for declared and parameterized variable names
static auto constexpr s_varNamePrefix = "x_";
static auto constexpr s_paramNamePrefix = "c_";