Differential D4095 Diff 10471 debuggers/lldb/formatters/helpers.py

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debuggers/lldb/formatters/helpers.py

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16# GNU General Public License for more details. 16​# GNU General Public License for more details.
17# 17​#
18# You should have received a copy of the GNU General Public License 18​# You should have received a copy of the GNU General Public License
19# along with this program. If not, see <http://www.gnu.org/licenses/>. 19​# along with this program. If not, see <http://www.gnu.org/licenses/>.
20# 20​#
21 21​
22# BEGIN: Utilities for wrapping differences of Python 2.x and Python 3 22​# BEGIN: Utilities for wrapping differences of Python 2.x and Python 3
23# Inspired by http://pythonhosted.org/six/ 23​# Inspired by http://pythonhosted.org/six/
24 24​from __future__ import print_function
25import sys 25​import sys
26import lldb 26​import lldb
27# Useful for very coarse version differentiation. 27​# Useful for very coarse version differentiation.
28PY2 = sys.version_info[0] == 2 28​PY2 = sys.version_info[0] == 2
29PY3 = sys.version_info[0] == 3 29​PY3 = sys.version_info[0] == 3
30 30​
31# create Python 2.x & 3.x compatible iterator base 31​# create Python 2.x & 3.x compatible iterator base
32if PY3: 32​if PY3:
33 Iterator = object 33​ Iterator = object
34else: 34​else:
35 class Iterator(object): 35​ class Iterator(object):
36 36​
37 def next(self): 37​ def next(self):
38 return type(self).__next__(self) 38​ return type(self).__next__(self)
39if PY3: 39​if PY3:
40 unichr = chr 40​ unichr = chr
41​ unicode = str
41else: 42​else:
42 unichr = unichr 43​ unichr = unichr
43# END 44​# END
44 45​
45 46​
47​def canonicalized_type_name(name):
48​ """Canonicalize the type name for FindFirstType usage.
49​ + 1 space between template arguments (after comma)
50​ + no space before pointer *
51​ otherwise FindFirstType returns None
52​ """
53​ return name.replace(' ', '').replace(',', ', ')
54​
55​
46def quote(string, quote='"'): 56​def quote(string, quote='"'):
47 """Quote a string so it's suitable to be used in quote""" 57​ """Quote a string so it's suitable to be used in quote"""
48 if isinstance(string, unicode): 58​ if isinstance(string, unicode):
49 ls = [] 59​ ls = []
50 for uch in string: 60​ for uch in string:
51 code = ord(uch) 61​ code = ord(uch)
52 if code > 255: 62​ if code > 255:
53 ls += '\\u{:04x}'.format(code) 63​ ls += '\\u{:04x}'.format(code)
54 elif code >= 127: 64​ elif code >= 127:
55 ls += '\\x{:02x}'.format(code) 65​ ls += '\\x{:02x}'.format(code)
56 elif uch == quote or uch == '\\': 66​ elif uch == quote or uch == '\\':
57 ls += '\\' + chr(code) 67​ ls += '\\' + chr(code)
58 elif code == 0: 68​ elif code == 0:
59 ls += '\\x00' 69​ ls += '\\x00'
60 else: 70​ else:
61 ls += chr(code) 71​ ls += chr(code)
62 return quote + ''.join(ls) + quote 72​ return quote + ''.join(ls) + quote
63 else: 73​ else:
64 return '{q}{s}{q}'.format(s=string.replace('\\', '\\\\').replace(quote, '\\' + quote), 74​ return '{q}{s}{q}'.format(s=string.replace('\\', '\\\\').replace(quote, '\\' + quote),
65 q=quote) 75​ q=quote)
66 76​
67 77​
68def unquote(string, quote='"'): 78​def unquote(data, quote='"'):
69 """Unquote a string""" 79​ """Unquote a string"""
70 if string.startswith(quote) and string.endswith(quote): 80​ if data.startswith(quote) and data.endswith(quote):
71 string = string.lstrip(quote).rstrip(quote) 81​ data = data[1:-1]
72 ls = [] 82​ ls = []
73 esc = False 83​ esc = False
74 for idx in range(0, len(string)): 84​ for ch in data:
75 ch = string[idx] 85​ if esc:
76 if ch == '\\': ​
77 if esc: ​
78 ls.append(ch) ​
79 esc = not esc ​
80 else: ​
81 ls.append(ch) 86​ ls.append(ch)
82 string = ''.join(ls) 87​ esc = False
83 return string 88​ else:
89​ if ch == '\\':
90​ esc = True
91​ else:
92​ ls.append(ch)
93​ if esc:
94​ print('WARNING: unpaired escape')
95​ data = ''.join(ls)
96​ return data
84 97​
85 98​
86def invoke(val, method, args=''): 99​def invoke(val, method, args=''):
87 """Try to invoke a method on val, args are passed in as an expression string""" 100​ """Try to invoke a method on val, args are passed in as an expression string"""
88 # first try to get a valid frame 101​ # first try to get a valid frame
89 frame = None 102​ frame = None
90 for f in [val.frame, lldb.frame, val.process.selected_thread.GetFrameAtIndex(0)]: 103​ for f in [val.frame, lldb.frame, val.process.selected_thread.GetFrameAtIndex(0)]:
91 if f.IsValid(): 104​ if f.IsValid():
92 frame = f 105​ frame = f
93 break 106​ break
94 if frame is None: 107​ if frame is None:
95 return lldb.SBValue() 108​ return lldb.SBValue()
96 109​
97 # second try to get a pointer to val 110​ # second try to get a pointer to val
98 if val.GetType().IsPointerType(): 111​ if val.GetType().IsPointerType():
99 ptype = val.GetType() 112​ ptype = val.GetType()
100 addr = val.GetValueAsUnsigned(0) 113​ addr = val.GetValueAsUnsigned(0)
101 else: 114​ else:
102 ptype = val.GetType().GetPointerType() 115​ ptype = val.GetType().GetPointerType()
103 addr = val.AddressOf().GetValueAsUnsigned(0) 116​ addr = val.AddressOf().GetValueAsUnsigned(0)
104 117​
105 # third, build expression 118​ # third, build expression
106 expr = 'reinterpret_cast<const {}>({})->{}({})'.format(ptype.GetName(), addr, method, args) 119​ expr = 'reinterpret_cast<const {}>({})->{}({})'.format(ptype.GetName(), addr, method, args)
107 res = frame.EvaluateExpression(expr) 120​ res = frame.EvaluateExpression(expr)
108 #if not res.IsValid(): 121​ # if not res.IsValid():
109 #print 'Expr {} on value {} failed'.format(expr, val.GetName()) 122​ # print 'Expr {} on value {} failed'.format(expr, val.GetName())
110 return res 123​ return res
111 124​
112 125​
113def rename(name, val): 126​def rename(name, val):
114 """Rename a SBValue""" 127​ """Rename a SBValue"""
115 return val.CreateValueFromData(name, val.GetData(), val.GetType()) 128​ return val.CreateValueFromData(name, val.GetData(), val.GetType())
116 129​
117 130​
▲ Show 20 Lines • Show All 86 Lines • ▼ Show 20 Line(s)199 def get_child_at_index(self, idx):
204 if isinstance(child, lldb.SBValue): 217​ if isinstance(child, lldb.SBValue):
205 return child 218​ return child
206 else: 219​ else:
207 # we don't cache (const char[]) SBValue, ceate it on the fly 220​ # we don't cache (const char[]) SBValue, ceate it on the fly
208 # LLDB tends to reuse a static data space for c-string literal type expressions, 221​ # LLDB tends to reuse a static data space for c-string literal type expressions,
209 # it might be overwriten by others if we cache them. 222​ # it might be overwriten by others if we cache them.
210 # child is a (name, expr) tuple in this case 223​ # child is a (name, expr) tuple in this case
211 if len(child) != 2: 224​ if len(child) != 2:
212 print 'error, const char[] value should be a tuple with two elements, it is', child 225​ print('error, const char[] value should be a tuple with two elements, it is', child)
213 return self.valobj.CreateValueFromExpression(*child) 226​ return self.valobj.CreateValueFromExpression(*child)
214 227​
215 @staticmethod 228​ @staticmethod
216 def _getName(var): 229​ def _getName(var):
217 if isinstance(var, lldb.SBValue): 230​ if isinstance(var, lldb.SBValue):
218 return var.GetName() 231​ return var.GetName()
219 else: 232​ else:
220 return var[0] 233​ return var[0]
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