1 # Copyright (C) 2012 Apple. All rights reserved.
3 # Redistribution and use in source and binary forms, with or without
4 # modification, are permitted provided that the following conditions
6 # 1. Redistributions of source code must retain the above copyright
7 # notice, this list of conditions and the following disclaimer.
8 # 2. Redistributions in binary form must reproduce the above copyright
9 # notice, this list of conditions and the following disclaimer in the
10 # documentation and/or other materials provided with the distribution.
12 # THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY
13 # EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
14 # WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
15 # DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY
16 # DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
17 # (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
18 # LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
19 # ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
20 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
21 # SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 LLDB Support for WebKit Types
26 Add the following to your .lldbinit file to add WebKit Type summaries in LLDB and Xcode:
28 command script import {Path to WebKit Root}/Tools/lldb/lldb_webkit.py
35 def __lldb_init_module(debugger, dict):
36 debugger.HandleCommand('type summary add --expand -F lldb_webkit.WTFString_SummaryProvider WTF::String')
37 debugger.HandleCommand('type summary add --expand -F lldb_webkit.WTFStringImpl_SummaryProvider WTF::StringImpl')
38 debugger.HandleCommand('type summary add --expand -F lldb_webkit.WTFAtomicString_SummaryProvider WTF::AtomicString')
39 debugger.HandleCommand('type summary add --expand -F lldb_webkit.WTFVector_SummaryProvider -x "WTF::Vector<.+>$"')
40 debugger.HandleCommand('type summary add --expand -F lldb_webkit.WTFHashTable_SummaryProvider -x "WTF::HashTable<.+>$"')
41 debugger.HandleCommand('type synthetic add -x "WTF::Vector<.+>$" --python-class lldb_webkit.WTFVectorProvider')
42 debugger.HandleCommand('type synthetic add -x "WTF::HashTable<.+>$" --python-class lldb_webkit.WTFHashTableProvider')
44 def WTFString_SummaryProvider(valobj, dict):
45 provider = WTFStringProvider(valobj, dict)
46 return "{ length = %d, contents = '%s' }" % (provider.get_length(), provider.to_string())
49 def WTFStringImpl_SummaryProvider(valobj, dict):
50 provider = WTFStringImplProvider(valobj, dict)
51 return "{ length = %d, is8bit = %d, contents = '%s' }" % (provider.get_length(), provider.is_8bit(), provider.to_string())
54 def WTFAtomicString_SummaryProvider(valobj, dict):
55 return WTFString_SummaryProvider(valobj.GetChildMemberWithName('m_string'), dict)
58 def WTFVector_SummaryProvider(valobj, dict):
59 provider = WTFVectorProvider(valobj, dict)
60 return "{ size = %d, capacity = %d }" % (provider.size, provider.capacity)
63 def WTFHashTable_SummaryProvider(valobj, dict):
64 provider = WTFHashTableProvider(valobj, dict)
65 return "{ tableSize = %d, keyCount = %d }" % (provider.tableSize(), provider.keyCount())
67 # FIXME: Provide support for the following types:
68 # def WTFVector_SummaryProvider(valobj, dict):
69 # def WTFCString_SummaryProvider(valobj, dict):
70 # def WebCoreKURLGooglePrivate_SummaryProvider(valobj, dict):
71 # def WebCoreQualifiedName_SummaryProvider(valobj, dict):
72 # def JSCIdentifier_SummaryProvider(valobj, dict):
73 # def JSCJSString_SummaryProvider(valobj, dict):
76 def guess_string_length(valobj, charSize, error):
77 if not valobj.GetValue():
82 pointer = valobj.GetValueAsUnsigned()
83 contents = valobj.GetProcess().ReadMemory(pointer, maxLength * charSize, lldb.SBError())
84 format = 'B' if charSize == 1 else 'H'
86 for i in xrange(0, maxLength):
87 if not struct.unpack_from(format, contents, i * charSize)[0]:
92 def ustring_to_string(valobj, error, length=None):
94 length = guess_string_length(valobj, 2, error)
98 pointer = valobj.GetValueAsUnsigned()
99 contents = valobj.GetProcess().ReadMemory(pointer, length * 2, lldb.SBError())
101 # lldb does not (currently) support returning unicode from python summary providers,
102 # so potentially convert this to ascii by escaping
103 string = contents.decode('utf16')
107 return string.encode('unicode_escape')
109 def lstring_to_string(valobj, error, length=None):
111 length = guess_string_length(valobj, 1, error)
115 pointer = valobj.GetValueAsUnsigned()
116 contents = valobj.GetProcess().ReadMemory(pointer, length, lldb.SBError())
118 # lldb does not (currently) support returning unicode from python summary providers,
119 # so potentially convert this to ascii by escaping
120 string = contents.decode('utf8')
124 return string.encode('unicode_escape')
126 class WTFStringImplProvider:
127 def __init__(self, valobj, dict):
130 def get_length(self):
131 return self.valobj.GetChildMemberWithName('m_length').GetValueAsUnsigned(0)
134 return self.valobj.GetChildAtIndex(2).GetChildMemberWithName('m_data8')
136 def get_data16(self):
137 return self.valobj.GetChildAtIndex(2).GetChildMemberWithName('m_data16')
140 error = lldb.SBError()
142 return lstring_to_string(self.get_data8(), error, self.get_length())
143 return ustring_to_string(self.get_data16(), error, self.get_length())
146 # FIXME: find a way to access WTF::StringImpl::s_hashFlag8BitBuffer
147 return bool(self.valobj.GetChildMemberWithName('m_hashAndFlags').GetValueAsUnsigned(0) \
151 class WTFStringProvider:
152 def __init__(self, valobj, dict):
155 def stringimpl(self):
156 impl_ptr = self.valobj.GetChildMemberWithName('m_impl').GetChildMemberWithName('m_ptr')
157 return WTFStringImplProvider(impl_ptr, dict)
159 def get_length(self):
160 impl = self.stringimpl()
163 return impl.get_length()
166 impl = self.stringimpl()
169 return impl.to_string()
172 class WTFVectorProvider:
173 def __init__(self, valobj, internal_dict):
177 def num_children(self):
180 def get_child_index(self, name):
183 elif name == "m_capacity":
185 elif name == "m_buffer":
188 return int(name.lstrip('[').rstrip(']'))
190 def get_child_at_index(self, index):
191 if index == self.size:
192 return self.valobj.GetChildMemberWithName("m_size")
193 elif index == self.size + 1:
194 return self.valobj.GetChildMemberWithName("m_capacity")
195 elif index == self.size + 2:
197 elif index < self.size:
198 offset = index * self.data_size
199 child = self.buffer.CreateChildAtOffset('[' + str(index) + ']', offset, self.data_type)
205 self.buffer = self.valobj.GetChildMemberWithName('m_buffer')
206 self.size = self.valobj.GetChildMemberWithName('m_size').GetValueAsUnsigned(0)
207 self.capacity = self.buffer.GetChildMemberWithName('m_capacity').GetValueAsUnsigned(0)
208 self.data_type = self.buffer.GetType().GetPointeeType()
209 self.data_size = self.data_type.GetByteSize()
211 def has_children(self):
215 class WTFHashTableProvider:
216 def __init__(self, valobj, internal_dict):
220 def num_children(self):
221 return self.tableSize() + 5
223 def get_child_index(self, name):
224 if name == "m_table":
225 return self.tableSize()
226 elif name == "m_tableSize":
227 return self.tableSize() + 1
228 elif name == "m_tableSizeMask":
229 return self.tableSize() + 2
230 elif name == "m_keyCount":
231 return self.tableSize() + 3
232 elif name == "m_deletedCount":
233 return self.tableSize() + 4
235 return int(name.lstrip('[').rstrip(']'))
237 def get_child_at_index(self, index):
238 if index == self.tableSize():
239 return self.valobj.GetChildMemberWithName('m_table')
240 elif index == self.tableSize() + 1:
241 return self.valobj.GetChildMemberWithName('m_tableSize')
242 elif index == self.tableSize() + 2:
243 return self.valobj.GetChildMemberWithName('m_tableSizeMask')
244 elif index == self.tableSize() + 3:
245 return self.valobj.GetChildMemberWithName('m_keyCount')
246 elif index == self.tableSize() + 4:
247 return self.valobj.GetChildMemberWithName('m_deletedCount')
248 elif index < self.tableSize():
249 table = self.valobj.GetChildMemberWithName('m_table')
250 return table.CreateChildAtOffset('[' + str(index) + ']', index * self.data_size, self.data_type)
255 return self.valobj.GetChildMemberWithName('m_tableSize').GetValueAsUnsigned(0)
258 return self.valobj.GetChildMemberWithName('m_keyCount').GetValueAsUnsigned(0)
261 self.data_type = self.valobj.GetType().GetTemplateArgumentType(0)
262 self.data_size = self.data_type.GetByteSize()
264 def has_children(self):