| import gdb.printing |
| class SmallStringPrinter: |
| """Print an llvm::SmallString object.""" |
| |
| def __init__(self, val): |
| self.val = val |
| |
| def to_string(self): |
| begin = self.val['BeginX'] |
| end = self.val['EndX'] |
| return begin.cast(gdb.lookup_type("char").pointer()).string(length = end - begin) |
| |
| def display_hint (self): |
| return 'string' |
| |
| class StringRefPrinter: |
| """Print an llvm::StringRef object.""" |
| |
| def __init__(self, val): |
| self.val = val |
| |
| def to_string(self): |
| return self.val['Data'].string(length = self.val['Length']) |
| |
| def display_hint (self): |
| return 'string' |
| |
| class SmallVectorPrinter: |
| """Print an llvm::SmallVector object.""" |
| |
| class _iterator: |
| def __init__(self, begin, end): |
| self.cur = begin |
| self.end = end |
| self.count = 0 |
| |
| def __iter__(self): |
| return self |
| |
| def next(self): |
| if self.cur == self.end: |
| raise StopIteration |
| count = self.count |
| self.count = self.count + 1 |
| cur = self.cur |
| self.cur = self.cur + 1 |
| return '[%d]' % count, cur.dereference() |
| |
| __next__ = next |
| |
| def __init__(self, val): |
| self.val = val |
| |
| def children(self): |
| t = self.val.type.template_argument(0).pointer() |
| begin = self.val['BeginX'].cast(t) |
| end = self.val['EndX'].cast(t) |
| return self._iterator(begin, end) |
| |
| def to_string(self): |
| t = self.val.type.template_argument(0).pointer() |
| begin = self.val['BeginX'].cast(t) |
| end = self.val['EndX'].cast(t) |
| capacity = self.val['CapacityX'].cast(t) |
| return 'llvm::SmallVector of length %d, capacity %d' % (end - begin, capacity - begin) |
| |
| def display_hint (self): |
| return 'array' |
| |
| class ArrayRefPrinter: |
| """Print an llvm::ArrayRef object.""" |
| |
| class _iterator: |
| def __init__(self, begin, end): |
| self.cur = begin |
| self.end = end |
| self.count = 0 |
| |
| def __iter__(self): |
| return self |
| |
| def next(self): |
| if self.cur == self.end: |
| raise StopIteration |
| count = self.count |
| self.count = self.count + 1 |
| cur = self.cur |
| self.cur = self.cur + 1 |
| return '[%d]' % count, cur.dereference() |
| |
| __next__ = next |
| |
| def __init__(self, val): |
| self.val = val |
| |
| def children(self): |
| data = self.val['Data'] |
| return self._iterator(data, data + self.val['Length']) |
| |
| def to_string(self): |
| return 'llvm::ArrayRef of length %d' % (self.val['Length']) |
| |
| def display_hint (self): |
| return 'array' |
| |
| class OptionalPrinter: |
| """Print an llvm::Optional object.""" |
| |
| def __init__(self, value): |
| self.value = value |
| |
| class _iterator: |
| def __init__(self, member, empty): |
| self.member = member |
| self.done = empty |
| |
| def __iter__(self): |
| return self |
| |
| def next(self): |
| if self.done: |
| raise StopIteration |
| self.done = True |
| return ('value', self.member.dereference()) |
| |
| def children(self): |
| if not self.value['hasVal']: |
| return self._iterator('', True) |
| return self._iterator(self.value['storage']['buffer'].address.cast(self.value.type.template_argument(0).pointer()), False) |
| |
| def to_string(self): |
| return 'llvm::Optional is %sinitialized' % ('' if self.value['hasVal'] else 'not ') |
| |
| class DenseMapPrinter: |
| "Print a DenseMap" |
| |
| class _iterator: |
| def __init__(self, key_info_t, begin, end): |
| self.key_info_t = key_info_t |
| self.cur = begin |
| self.end = end |
| self.advancePastEmptyBuckets() |
| self.first = True |
| |
| def __iter__(self): |
| return self |
| |
| def advancePastEmptyBuckets(self): |
| # disabled until the comments below can be addressed |
| # keeping as notes/posterity/hints for future contributors |
| return |
| n = self.key_info_t.name |
| is_equal = gdb.parse_and_eval(n + '::isEqual') |
| empty = gdb.parse_and_eval(n + '::getEmptyKey()') |
| tombstone = gdb.parse_and_eval(n + '::getTombstoneKey()') |
| # the following is invalid, GDB fails with: |
| # Python Exception <class 'gdb.error'> Attempt to take address of value |
| # not located in memory. |
| # because isEqual took parameter (for the unsigned long key I was testing) |
| # by const ref, and GDB |
| # It's also not entirely general - we should be accessing the "getFirst()" |
| # member function, not the 'first' member variable, but I've yet to figure |
| # out how to find/call member functions (especially (const) overloaded |
| # ones) on a gdb.Value. |
| while self.cur != self.end and (is_equal(self.cur.dereference()['first'], empty) or is_equal(self.cur.dereference()['first'], tombstone)): |
| self.cur = self.cur + 1 |
| |
| def next(self): |
| if self.cur == self.end: |
| raise StopIteration |
| cur = self.cur |
| v = cur.dereference()['first' if self.first else 'second'] |
| if not self.first: |
| self.cur = self.cur + 1 |
| self.advancePastEmptyBuckets() |
| self.first = True |
| else: |
| self.first = False |
| return 'x', v |
| |
| def __init__(self, val): |
| self.val = val |
| |
| def children(self): |
| t = self.val.type.template_argument(3).pointer() |
| begin = self.val['Buckets'].cast(t) |
| end = (begin + self.val['NumBuckets']).cast(t) |
| return self._iterator(self.val.type.template_argument(2), begin, end) |
| |
| def to_string(self): |
| return 'llvm::DenseMap with %d elements' % (self.val['NumEntries']) |
| |
| def display_hint(self): |
| return 'map' |
| |
| |
| pp = gdb.printing.RegexpCollectionPrettyPrinter("LLVMSupport") |
| pp.add_printer('llvm::SmallString', '^llvm::SmallString<.*>$', SmallStringPrinter) |
| pp.add_printer('llvm::StringRef', '^llvm::StringRef$', StringRefPrinter) |
| pp.add_printer('llvm::SmallVectorImpl', '^llvm::SmallVector(Impl)?<.*>$', SmallVectorPrinter) |
| pp.add_printer('llvm::ArrayRef', '^llvm::(Const)?ArrayRef<.*>$', ArrayRefPrinter) |
| pp.add_printer('llvm::Optional', '^llvm::Optional<.*>$', OptionalPrinter) |
| pp.add_printer('llvm::DenseMap', '^llvm::DenseMap<.*>$', DenseMapPrinter) |
| gdb.printing.register_pretty_printer(gdb.current_objfile(), pp) |