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1import gdb.printing
2class SmallStringPrinter:
3  """Print an llvm::SmallString object."""
4
5  def __init__(self, val):
6    self.val = val
7
8  def to_string(self):
9    begin = self.val['BeginX']
10    end = self.val['EndX']
11    return begin.cast(gdb.lookup_type("char").pointer()).string(length = end - begin)
12
13  def display_hint (self):
14    return 'string'
15
16class StringRefPrinter:
17  """Print an llvm::StringRef object."""
18
19  def __init__(self, val):
20    self.val = val
21
22  def to_string(self):
23    return self.val['Data'].string(length =  self.val['Length'])
24
25  def display_hint (self):
26    return 'string'
27
28class SmallVectorPrinter:
29  """Print an llvm::SmallVector object."""
30
31  class _iterator:
32    def __init__(self, begin, end):
33      self.cur = begin
34      self.end = end
35      self.count = 0
36
37    def __iter__(self):
38      return self
39
40    def next(self):
41      if self.cur == self.end:
42        raise StopIteration
43      count = self.count
44      self.count = self.count + 1
45      cur = self.cur
46      self.cur = self.cur + 1
47      return '[%d]' % count, cur.dereference()
48
49  def __init__(self, val):
50    self.val = val
51
52  def children(self):
53    t = self.val.type.template_argument(0).pointer()
54    begin = self.val['BeginX'].cast(t)
55    end = self.val['EndX'].cast(t)
56    return self._iterator(begin, end)
57
58  def to_string(self):
59    t = self.val.type.template_argument(0).pointer()
60    begin = self.val['BeginX'].cast(t)
61    end = self.val['EndX'].cast(t)
62    capacity = self.val['CapacityX'].cast(t)
63    return 'llvm::SmallVector of length %d, capacity %d' % (end - begin, capacity - begin)
64
65  def display_hint (self):
66    return 'array'
67
68class ArrayRefPrinter:
69  """Print an llvm::ArrayRef object."""
70
71  class _iterator:
72    def __init__(self, begin, end):
73      self.cur = begin
74      self.end = end
75      self.count = 0
76
77    def __iter__(self):
78      return self
79
80    def next(self):
81      if self.cur == self.end:
82        raise StopIteration
83      count = self.count
84      self.count = self.count + 1
85      cur = self.cur
86      self.cur = self.cur + 1
87      return '[%d]' % count, cur.dereference()
88
89  def __init__(self, val):
90    self.val = val
91
92  def children(self):
93    data = self.val['Data']
94    return self._iterator(data, data + self.val['Length'])
95
96  def to_string(self):
97    return 'llvm::ArrayRef of length %d' % (self.val['Length'])
98
99  def display_hint (self):
100    return 'array'
101
102pp = gdb.printing.RegexpCollectionPrettyPrinter("LLVMSupport")
103pp.add_printer('llvm::SmallString', '^llvm::SmallString<.*>$', SmallStringPrinter)
104pp.add_printer('llvm::StringRef', '^llvm::StringRef$', StringRefPrinter)
105pp.add_printer('llvm::SmallVectorImpl', '^llvm::SmallVector(Impl)?<.*>$', SmallVectorPrinter)
106pp.add_printer('llvm::ArrayRef', '^llvm::(Const)?ArrayRef<.*>$', ArrayRefPrinter)
107gdb.printing.register_pretty_printer(gdb.current_objfile(), pp)
108