Cheng Shao pushed to branch wip/ubsan at Glasgow Haskell Compiler / GHC Commits: 310bf01b by Cheng Shao at 2025-11-24T15:07:19+01:00 rts: fix signed integer overflow in subword arithmetic in interpretBCO - - - - - 1 changed file: - rts/Interpreter.c Changes: ===================================== rts/Interpreter.c ===================================== @@ -2904,6 +2904,8 @@ run_BCO: NEXT_INSTRUCTION; \ } +#define TYPE_IS_SIGNED(ty) ((ty)-1 < (ty)1) + // op :: ty -> ty -> ty #define SIZED_BIN_OP(op,ty) \ { \ @@ -2911,8 +2913,12 @@ run_BCO: ty r = ((ty) ReadSpW64(0)) op ((ty) ReadSpW64(1)); \ Sp_addW64(1); \ SpW64(0) = (StgWord64) r; \ + } else if (TYPE_IS_SIGNED(ty)) { \ + ty r = ((StgInt)(ty)ReadSpW(0)) op ((StgInt)(ty)ReadSpW(1)); \ + Sp_addW(1); \ + SpW(0) = (StgWord) r; \ } else { \ - ty r = ((ty) ReadSpW(0)) op ((ty) ReadSpW(1)); \ + ty r = ((StgWord)(ty)ReadSpW(0)) op ((StgWord)(ty)ReadSpW(1)); \ Sp_addW(1); \ SpW(0) = (StgWord) r; \ }; \ @@ -2949,12 +2955,12 @@ run_BCO: NEXT_INSTRUCTION; \ } - INSTRUCTION(bci_OP_ADD_64): SIZED_BIN_OP(+, StgInt64) - INSTRUCTION(bci_OP_SUB_64): SIZED_BIN_OP(-, StgInt64) - INSTRUCTION(bci_OP_AND_64): SIZED_BIN_OP(&, StgInt64) - INSTRUCTION(bci_OP_XOR_64): SIZED_BIN_OP(^, StgInt64) - INSTRUCTION(bci_OP_OR_64): SIZED_BIN_OP(|, StgInt64) - INSTRUCTION(bci_OP_MUL_64): SIZED_BIN_OP(*, StgInt64) + INSTRUCTION(bci_OP_ADD_64): SIZED_BIN_OP(+, StgWord64) + INSTRUCTION(bci_OP_SUB_64): SIZED_BIN_OP(-, StgWord64) + INSTRUCTION(bci_OP_AND_64): SIZED_BIN_OP(&, StgWord64) + INSTRUCTION(bci_OP_XOR_64): SIZED_BIN_OP(^, StgWord64) + INSTRUCTION(bci_OP_OR_64): SIZED_BIN_OP(|, StgWord64) + INSTRUCTION(bci_OP_MUL_64): SIZED_BIN_OP(*, StgWord64) INSTRUCTION(bci_OP_SHL_64): SIZED_BIN_OP_TY_INT(<<, StgWord64) INSTRUCTION(bci_OP_LSR_64): SIZED_BIN_OP_TY_INT(>>, StgWord64) INSTRUCTION(bci_OP_ASR_64): SIZED_BIN_OP_TY_INT(>>, StgInt64) @@ -2972,15 +2978,15 @@ run_BCO: INSTRUCTION(bci_OP_S_LE_64): SIZED_BIN_OP_TY_TY_INT(<=, StgInt64) INSTRUCTION(bci_OP_NOT_64): UN_SIZED_OP(~, StgWord64) - INSTRUCTION(bci_OP_NEG_64): UN_SIZED_OP(-, StgInt64) + INSTRUCTION(bci_OP_NEG_64): UN_SIZED_OP(-, StgWord64) - INSTRUCTION(bci_OP_ADD_32): SIZED_BIN_OP(+, StgInt32) - INSTRUCTION(bci_OP_SUB_32): SIZED_BIN_OP(-, StgInt32) - INSTRUCTION(bci_OP_AND_32): SIZED_BIN_OP(&, StgInt32) - INSTRUCTION(bci_OP_XOR_32): SIZED_BIN_OP(^, StgInt32) - INSTRUCTION(bci_OP_OR_32): SIZED_BIN_OP(|, StgInt32) - INSTRUCTION(bci_OP_MUL_32): SIZED_BIN_OP(*, StgInt32) + INSTRUCTION(bci_OP_ADD_32): SIZED_BIN_OP(+, StgWord32) + INSTRUCTION(bci_OP_SUB_32): SIZED_BIN_OP(-, StgWord32) + INSTRUCTION(bci_OP_AND_32): SIZED_BIN_OP(&, StgWord32) + INSTRUCTION(bci_OP_XOR_32): SIZED_BIN_OP(^, StgWord32) + INSTRUCTION(bci_OP_OR_32): SIZED_BIN_OP(|, StgWord32) + INSTRUCTION(bci_OP_MUL_32): SIZED_BIN_OP(*, StgWord32) INSTRUCTION(bci_OP_SHL_32): SIZED_BIN_OP_TY_INT(<<, StgWord32) INSTRUCTION(bci_OP_LSR_32): SIZED_BIN_OP_TY_INT(>>, StgWord32) INSTRUCTION(bci_OP_ASR_32): SIZED_BIN_OP_TY_INT(>>, StgInt32) @@ -2998,15 +3004,15 @@ run_BCO: INSTRUCTION(bci_OP_S_LE_32): SIZED_BIN_OP_TY_TY_INT(<=, StgInt32) INSTRUCTION(bci_OP_NOT_32): UN_SIZED_OP(~, StgWord32) - INSTRUCTION(bci_OP_NEG_32): UN_SIZED_OP(-, StgInt32) + INSTRUCTION(bci_OP_NEG_32): UN_SIZED_OP(-, StgWord32) - INSTRUCTION(bci_OP_ADD_16): SIZED_BIN_OP(+, StgInt16) - INSTRUCTION(bci_OP_SUB_16): SIZED_BIN_OP(-, StgInt16) - INSTRUCTION(bci_OP_AND_16): SIZED_BIN_OP(&, StgInt16) - INSTRUCTION(bci_OP_XOR_16): SIZED_BIN_OP(^, StgInt16) - INSTRUCTION(bci_OP_OR_16): SIZED_BIN_OP(|, StgInt16) - INSTRUCTION(bci_OP_MUL_16): SIZED_BIN_OP(*, StgInt16) + INSTRUCTION(bci_OP_ADD_16): SIZED_BIN_OP(+, StgWord16) + INSTRUCTION(bci_OP_SUB_16): SIZED_BIN_OP(-, StgWord16) + INSTRUCTION(bci_OP_AND_16): SIZED_BIN_OP(&, StgWord16) + INSTRUCTION(bci_OP_XOR_16): SIZED_BIN_OP(^, StgWord16) + INSTRUCTION(bci_OP_OR_16): SIZED_BIN_OP(|, StgWord16) + INSTRUCTION(bci_OP_MUL_16): SIZED_BIN_OP(*, StgWord16) INSTRUCTION(bci_OP_SHL_16): SIZED_BIN_OP_TY_INT(<<, StgWord16) INSTRUCTION(bci_OP_LSR_16): SIZED_BIN_OP_TY_INT(>>, StgWord16) INSTRUCTION(bci_OP_ASR_16): SIZED_BIN_OP_TY_INT(>>, StgInt16) @@ -3024,15 +3030,15 @@ run_BCO: INSTRUCTION(bci_OP_S_LE_16): SIZED_BIN_OP(<=, StgInt16) INSTRUCTION(bci_OP_NOT_16): UN_SIZED_OP(~, StgWord16) - INSTRUCTION(bci_OP_NEG_16): UN_SIZED_OP(-, StgInt16) + INSTRUCTION(bci_OP_NEG_16): UN_SIZED_OP(-, StgWord16) - INSTRUCTION(bci_OP_ADD_08): SIZED_BIN_OP(+, StgInt8) - INSTRUCTION(bci_OP_SUB_08): SIZED_BIN_OP(-, StgInt8) - INSTRUCTION(bci_OP_AND_08): SIZED_BIN_OP(&, StgInt8) - INSTRUCTION(bci_OP_XOR_08): SIZED_BIN_OP(^, StgInt8) - INSTRUCTION(bci_OP_OR_08): SIZED_BIN_OP(|, StgInt8) - INSTRUCTION(bci_OP_MUL_08): SIZED_BIN_OP(*, StgInt8) + INSTRUCTION(bci_OP_ADD_08): SIZED_BIN_OP(+, StgWord8) + INSTRUCTION(bci_OP_SUB_08): SIZED_BIN_OP(-, StgWord8) + INSTRUCTION(bci_OP_AND_08): SIZED_BIN_OP(&, StgWord8) + INSTRUCTION(bci_OP_XOR_08): SIZED_BIN_OP(^, StgWord8) + INSTRUCTION(bci_OP_OR_08): SIZED_BIN_OP(|, StgWord8) + INSTRUCTION(bci_OP_MUL_08): SIZED_BIN_OP(*, StgWord8) INSTRUCTION(bci_OP_SHL_08): SIZED_BIN_OP_TY_INT(<<, StgWord8) INSTRUCTION(bci_OP_LSR_08): SIZED_BIN_OP_TY_INT(>>, StgWord8) INSTRUCTION(bci_OP_ASR_08): SIZED_BIN_OP_TY_INT(>>, StgInt8) @@ -3050,7 +3056,7 @@ run_BCO: INSTRUCTION(bci_OP_S_LE_08): SIZED_BIN_OP_TY_TY_INT(<=, StgInt8) INSTRUCTION(bci_OP_NOT_08): UN_SIZED_OP(~, StgWord8) - INSTRUCTION(bci_OP_NEG_08): UN_SIZED_OP(-, StgInt8) + INSTRUCTION(bci_OP_NEG_08): UN_SIZED_OP(-, StgWord8) INSTRUCTION(bci_OP_INDEX_ADDR_64): { View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/310bf01b52db3b2ca6416170662d32ea... -- View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/310bf01b52db3b2ca6416170662d32ea... 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Cheng Shao (＠TerrorJack)