| """ |
| LLDB Formatters for LLVM data types for use in the swift project. |
| |
| Load into LLDB with 'command script import /path/to/lldbDataFormatters.py' |
| """ |
| |
| import sys |
| |
| |
| def __lldb_init_module(debugger, internal_dict): |
| tName = 'lldbSwiftDataFormatters.SmallBitVectorSummaryProvider' |
| debugger.HandleCommand('type summary add -w llvm ' |
| '-F %s -x "^llvm::SmallBitVector$"' % tName) |
| |
| |
| def SmallBitVectorSummaryProvider(valobj, internal_dict): |
| underlyingValue = valobj.GetChildMemberWithName('X').GetValueAsUnsigned() |
| numBaseBits = 32 |
| is64Bit = sys.maxsize > 2**32 |
| if is64Bit: |
| numBaseBits = 64 |
| smallNumRawBits = numBaseBits - 1 |
| smallNumSizeBits = None |
| if numBaseBits == 32: |
| smallNumSizeBits = 5 |
| elif numBaseBits == 64: |
| smallNumSizeBits = 6 |
| else: |
| smallNumSizeBits = smallNumRawBits |
| smallNumDataBits = smallNumRawBits - smallNumSizeBits |
| |
| # If our underlying value is not small, print we can not dump large values. |
| isSmallMask = 1 |
| if (underlyingValue & isSmallMask) == 0: |
| return '<can not read large SmallBitVector>' |
| |
| smallRawBits = underlyingValue >> 1 |
| smallSize = smallRawBits >> smallNumDataBits |
| bits = smallRawBits & ((1 << (smallSize + 1)) - 1) |
| res = "[" |
| for i in reversed(range(0, smallSize)): |
| if bool(bits & (1 << i)): |
| res += '1' |
| else: |
| res += '0' |
| res += "]" |
| return res |
