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Panic codes.

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This commit is contained in:
chriseth
2020-10-22 19:25:55 +02:00
parent b559de11ee
commit bfd267459c
14 changed files with 156 additions and 79 deletions
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libsolidity/codegen/YulUtilFunctions.cpp
+44 -36
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@@ -122,7 +122,7 @@ string YulUtilFunctions::requireOrAssertFunction(bool _assert, Type const* _mess
if iszero(condition) { <error> }
}
)")
("error", _assert ? panicFunction() + "()" : "revert(0, 0)")
("error", _assert ? panicFunction(PanicCode::Assert) + "()" : "revert(0, 0)")
("functionName", functionName)
.render();
@@ -478,7 +478,7 @@ string YulUtilFunctions::overflowCheckedIntAddFunction(IntegerType const& _type)
("maxValue", toCompactHexWithPrefix(u256(_type.maxValue())))
("minValue", toCompactHexWithPrefix(u256(_type.minValue())))
("cleanupFunction", cleanupFunction(_type))
("panic", panicFunction())
("panic", panicFunction(PanicCode::UnderOverflow))
.render();
});
}
@@ -530,7 +530,7 @@ string YulUtilFunctions::overflowCheckedIntMulFunction(IntegerType const& _type)
("maxValue", toCompactHexWithPrefix(u256(_type.maxValue())))
("minValue", toCompactHexWithPrefix(u256(_type.minValue())))
("cleanupFunction", cleanupFunction(_type))
("panic", panicFunction())
("panic", panicFunction(PanicCode::UnderOverflow))
.render();
});
}
@@ -560,13 +560,13 @@ string YulUtilFunctions::overflowCheckedIntDivFunction(IntegerType const& _type)
function <functionName>(x, y) -> r {
x := <cleanupFunction>(x)
y := <cleanupFunction>(y)
if iszero(y) { <panic>() }
if iszero(y) { <panicDivZero>() }
<?signed>
// overflow for minVal / -1
if and(
eq(x, <minVal>),
eq(y, sub(0, 1))
) { <panic>() }
) { <panicOverflow>() }
</signed>
r := <?signed>s</signed>div(x, y)
}
@@ -575,7 +575,8 @@ string YulUtilFunctions::overflowCheckedIntDivFunction(IntegerType const& _type)
("signed", _type.isSigned())
("minVal", toCompactHexWithPrefix(u256(_type.minValue())))
("cleanupFunction", cleanupFunction(_type))
("panic", panicFunction())
("panicDivZero", panicFunction(PanicCode::DivisionByZero))
("panicOverflow", panicFunction(PanicCode::UnderOverflow))
.render();
});
}
@@ -596,7 +597,7 @@ string YulUtilFunctions::wrappingIntDivFunction(IntegerType const& _type)
("functionName", functionName)
("cleanupFunction", cleanupFunction(_type))
("signed", _type.isSigned())
("error", panicFunction())
("error", panicFunction(PanicCode::DivisionByZero))
.render();
});
}
@@ -617,7 +618,7 @@ string YulUtilFunctions::intModFunction(IntegerType const& _type)
("functionName", functionName)
("signed", _type.isSigned())
("cleanupFunction", cleanupFunction(_type))
("panic", panicFunction())
("panic", panicFunction(PanicCode::DivisionByZero))
.render();
});
}
@@ -647,7 +648,7 @@ string YulUtilFunctions::overflowCheckedIntSubFunction(IntegerType const& _type)
("maxValue", toCompactHexWithPrefix(u256(_type.maxValue())))
("minValue", toCompactHexWithPrefix(u256(_type.minValue())))
("cleanupFunction", cleanupFunction(_type))
("panic", panicFunction())
("panic", panicFunction(PanicCode::UnderOverflow))
.render();
});
}
@@ -808,7 +809,7 @@ string YulUtilFunctions::overflowCheckedIntLiteralExpFunction(
("exponentCleanupFunction", cleanupFunction(_exponentType))
("needsOverflowCheck", needsOverflowCheck)
("exponentUpperbound", to_string(exponentUpperbound))
("panic", panicFunction())
("panic", panicFunction(PanicCode::UnderOverflow))
("base", bigint2u(baseValue).str())
.render();
});
@@ -866,7 +867,7 @@ string YulUtilFunctions::overflowCheckedUnsignedExpFunction()
}
)")
("functionName", functionName)
("panic", panicFunction())
("panic", panicFunction(PanicCode::UnderOverflow))
("expLoop", overflowCheckedExpLoopFunction())
("shr_1", shiftRightFunction(1))
.render();
@@ -916,7 +917,7 @@ string YulUtilFunctions::overflowCheckedSignedExpFunction()
}
)")
("functionName", functionName)
("panic", panicFunction())
("panic", panicFunction(PanicCode::UnderOverflow))
("expLoop", overflowCheckedExpLoopFunction())
("shr_1", shiftRightFunction(1))
.render();
@@ -957,7 +958,7 @@ string YulUtilFunctions::overflowCheckedExpLoopFunction()
}
)")
("functionName", functionName)
("panic", panicFunction())
("panic", panicFunction(PanicCode::UnderOverflow))
("shr_1", shiftRightFunction(1))
.render();
});
@@ -1087,7 +1088,7 @@ std::string YulUtilFunctions::resizeDynamicArrayFunction(ArrayType const& _type)
}
})")
("functionName", functionName)
("panic", panicFunction())
("panic", panicFunction(PanicCode::ResourceError))
("fetchLength", arrayLengthFunction(_type))
("convertToSize", arrayConvertLengthToSize(_type))
("dataPosition", arrayDataAreaFunction(_type))
@@ -1123,7 +1124,7 @@ string YulUtilFunctions::resizeDynamicByteArrayFunction(ArrayType const& _type)
}
})")
("functionName", functionName)
("panic", panicFunction())
("panic", panicFunction(PanicCode::ResourceError))
("extractLength", extractByteArrayLengthFunction())
("maxArrayLength", (u256(1) << 64).str())
("decreaseSize", decreaseByteArraySizeFunction(_type))
@@ -1266,7 +1267,7 @@ string YulUtilFunctions::storageArrayPopFunction(ArrayType const& _type)
sstore(array, newLen)
})")
("functionName", functionName)
("panic", panicFunction())
("panic", panicFunction(PanicCode::EmptyArrayPop))
("fetchLength", arrayLengthFunction(_type))
("indexAccess", storageArrayIndexAccessFunction(_type))
("setToZero", storageSetToZeroFunction(*_type.baseType()))
@@ -1308,7 +1309,7 @@ string YulUtilFunctions::storageByteArrayPopFunction(ArrayType const& _type)
}
})")
("functionName", functionName)
("panic", panicFunction())
("panic", panicFunction(PanicCode::EmptyArrayPop))
("extractByteArrayLength", extractByteArrayLengthFunction())
("transitLongToShort", byteArrayTransitLongToShortFunction(_type))
("encodeUsedSetLen", shortByteArrayEncodeUsedAreaSetLengthFunction())
@@ -1370,7 +1371,7 @@ string YulUtilFunctions::storageArrayPushFunction(ArrayType const& _type)
</isByteArray>
})")
("functionName", functionName)
("panic", panicFunction())
("panic", panicFunction(PanicCode::ResourceError))
("extractByteArrayLength", _type.isByteArray() ? extractByteArrayLengthFunction() : "")
("dataAreaFunction", arrayDataAreaFunction(_type))
("isByteArray", _type.isByteArray())
@@ -1400,7 +1401,7 @@ string YulUtilFunctions::storageArrayPushZeroFunction(ArrayType const& _type)
slot, offset := <indexAccess>(array, oldLen)
})")
("functionName", functionName)
("panic", panicFunction())
("panic", panicFunction(PanicCode::ResourceError))
("fetchLength", arrayLengthFunction(_type))
("indexAccess", storageArrayIndexAccessFunction(_type))
("maxArrayLength", (u256(1) << 64).str())
@@ -1715,7 +1716,7 @@ string YulUtilFunctions::arrayAllocationSizeFunction(ArrayType const& _type)
}
)");
w("functionName", functionName);
w("panic", panicFunction());
w("panic", panicFunction(PanicCode::ResourceError));
w("byteArray", _type.isByteArray());
w("dynamic", _type.isDynamicallySized());
return w.render();
@@ -1786,7 +1787,7 @@ string YulUtilFunctions::storageArrayIndexAccessFunction(ArrayType const& _type)
}
)")
("functionName", functionName)
("panic", panicFunction())
("panic", panicFunction(PanicCode::ArrayOutOfBounds))
("arrayLen", arrayLengthFunction(_type))
("dataAreaFunc", arrayDataAreaFunction(_type))
("multipleItemsPerSlot", _type.baseType()->storageBytes() <= 16)
@@ -1816,7 +1817,7 @@ string YulUtilFunctions::memoryArrayIndexAccessFunction(ArrayType const& _type)
}
)")
("functionName", functionName)
("panic", panicFunction())
("panic", panicFunction(PanicCode::ArrayOutOfBounds))
("arrayLen", arrayLengthFunction(_type))
("stride", to_string(_type.memoryStride()))
("dynamicallySized", _type.isDynamicallySized())
@@ -1839,7 +1840,7 @@ string YulUtilFunctions::calldataArrayIndexAccessFunction(ArrayType const& _type
}
)")
("functionName", functionName)
("panic", panicFunction())
("panic", panicFunction(PanicCode::ArrayOutOfBounds))
("stride", to_string(_type.calldataStride()))
("dynamicallySized", _type.isDynamicallySized())
("dynamicallyEncodedBase", _type.baseType()->isDynamicallyEncoded())
@@ -2509,7 +2510,7 @@ string YulUtilFunctions::allocationFunction()
)")
("functionName", functionName)
("freeMemoryPointer", to_string(CompilerUtils::freeMemoryPointer))
("panic", panicFunction())
("panic", panicFunction(PanicCode::ResourceError))
.render();
});
}
@@ -3085,10 +3086,7 @@ string YulUtilFunctions::validatorFunction(Type const& _type, bool _revertOnFail
}
)");
templ("functionName", functionName);
if (_revertOnFailure)
templ("failure", "revert(0, 0)");
else
templ("failure", panicFunction() + "()");
PanicCode panicCode = PanicCode::Generic;
switch (_type.category())
{
@@ -3111,6 +3109,7 @@ string YulUtilFunctions::validatorFunction(Type const& _type, bool _revertOnFail
{
size_t members = dynamic_cast<EnumType const&>(_type).numberOfMembers();
solAssert(members > 0, "empty enum should have caused a parser error.");
panicCode = PanicCode::EnumConversionError;
templ("condition", "lt(value, " + to_string(members) + ")");
break;
}
@@ -3121,6 +3120,11 @@ string YulUtilFunctions::validatorFunction(Type const& _type, bool _revertOnFail
solAssert(false, "Validation of type " + _type.identifier() + " requested.");
}
if (_revertOnFailure)
templ("failure", "revert(0, 0)");
else
templ("failure", panicFunction(panicCode) + "()");
return templ.render();
});
}
@@ -3196,7 +3200,7 @@ std::string YulUtilFunctions::decrementCheckedFunction(Type const& _type)
}
)")
("functionName", functionName)
("panic", panicFunction())
("panic", panicFunction(PanicCode::UnderOverflow))
("minval", toCompactHexWithPrefix(type.min()))
("cleanupFunction", cleanupFunction(_type))
.render();
@@ -3237,7 +3241,7 @@ std::string YulUtilFunctions::incrementCheckedFunction(Type const& _type)
)")
("functionName", functionName)
("maxval", toCompactHexWithPrefix(type.max()))
("panic", panicFunction())
("panic", panicFunction(PanicCode::UnderOverflow))
("cleanupFunction", cleanupFunction(_type))
.render();
});
@@ -3278,7 +3282,7 @@ string YulUtilFunctions::negateNumberCheckedFunction(Type const& _type)
("functionName", functionName)
("minval", toCompactHexWithPrefix(type.min()))
("cleanupFunction", cleanupFunction(_type))
("panic", panicFunction())
("panic", panicFunction(PanicCode::UnderOverflow))
.render();
});
}
@@ -3400,7 +3404,7 @@ string YulUtilFunctions::storageSetToZeroFunction(Type const& _type)
)")
("functionName", functionName)
("clearArray", clearStorageArrayFunction(dynamic_cast<ArrayType const&>(_type)))
("panic", panicFunction())
("panic", panicFunction(PanicCode::Generic))
.render();
else if (_type.category() == Type::Category::Struct)
return Whiskers(R"(
@@ -3411,7 +3415,7 @@ string YulUtilFunctions::storageSetToZeroFunction(Type const& _type)
)")
("functionName", functionName)
("clearStruct", clearStorageStructFunction(dynamic_cast<StructType const&>(_type)))
("panic", panicFunction())
("panic", panicFunction(PanicCode::Generic))
.render();
else
solUnimplemented("setToZero for type " + _type.identifier() + " not yet implemented!");
@@ -3645,16 +3649,20 @@ string YulUtilFunctions::revertReasonIfDebug(string const& _message)
return revertReasonIfDebug(m_revertStrings, _message);
}
string YulUtilFunctions::panicFunction()
string YulUtilFunctions::panicFunction(util::PanicCode _code)
{
string functionName = "panic_error";
string functionName = "panic_error_" + toCompactHexWithPrefix(uint64_t(_code));
return m_functionCollector.createFunction(functionName, [&]() {
return Whiskers(R"(
function <functionName>() {
invalid()
mstore(0, <selector>)
mstore(4, <code>)
revert(0, 0x24)
}
)")
("functionName", functionName)
("selector", util::selectorFromSignature("Panic(uint256)").str())
("code", toCompactHexWithPrefix(_code))
.render();
});
}