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symExec support for tuple type (hevm PR 522) #1309

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Sep 16, 2024
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symExec support for tuple type (hevm PR 522) #1309

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8 changes: 6 additions & 2 deletions lib/Echidna/SymExec.hs
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Original file line number Diff line number Diff line change
Expand Up @@ -174,6 +174,7 @@ modelToTx dst method senders fallbackSender result =
AbiBytesType _ -> grabNormalArg t
AbiAddressType -> grabAddressArg
AbiArrayType n mt -> grabArrayArg n mt
AbiTupleType mt -> grabTupleArg mt
_ -> error "Unexpected ABI type in `modelToTx`"

grabNormalArg argType name
Expand All @@ -185,7 +186,9 @@ modelToTx dst method senders fallbackSender result =

grabAddressArg name = AbiAddress $ fromMaybe 0 $ Map.lookup (SymAddr name) cex.addrs

grabArrayArg nElem memberType name = AbiArray nElem memberType $ fromList [grabArg memberType $ name <> T.pack (show n) | n <- [0..nElem] :: [Int]]
grabArrayArg nElem memberType name = AbiArray nElem memberType $ fromList [grabArg memberType $ name <> "-a-" <> T.pack (show n) | n <- [0..nElem] :: [Int]]

grabTupleArg memberTypes name = AbiTuple $ fromList [grabArg t $ name <> "-t-" <> T.pack (show n) | (n, t) <- zip ([0..] :: [Int]) (toList memberTypes)]

src_ = fromMaybe 0 $ Map.lookup (SymAddr "sender") cex.addrs
src = if Set.member src_ senders then src_ else fallbackSender
Expand Down Expand Up @@ -217,7 +220,8 @@ genSubsts (Tx { call = SolCall (_, abiVals), src, value }) = addOnFinalValues $
genVal (AbiBool b) name = ([(name, if b then 1 else 0)], [])
genVal (AbiAddress addr) name = ([], [(name, addr)])
genVal (AbiBytes n b) name | n > 0 && n <= 32 = ([(name, word b)], [])
genVal (AbiArray _ _ vals) name = fold $ zipWith genVal (toList vals) [name <> T.pack (show n) | n <- [0..] :: [Int]]
genVal (AbiArray _ _ vals) name = fold $ zipWith genVal (toList vals) [name <> "-a-" <> T.pack (show n) | n <- [0..] :: [Int]]
genVal (AbiTuple vals) name = fold $ zipWith genVal (toList vals) [name <> "-t-" <> T.pack (show n) | n <- [0..] :: [Int]]
genVal _ _ = error "`genSubsts` is not implemented for all API types, mirroring hevm's `symAbiArg` function"
genSubsts _ = error "`genSubsts` should only be called with a `SolCall` transaction argument"

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