mirror of
https://github.com/LadybirdBrowser/ladybird.git
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275 lines
7.8 KiB
Python
275 lines
7.8 KiB
Python
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# Copyright (c) 2021, Gunnar Beutner <gunnar@beutner.name>
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# All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions are met:
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#
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# 1. Redistributions of source code must retain the above copyright notice, this
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# list of conditions and the following disclaimer.
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#
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# 2. Redistributions in binary form must reproduce the above copyright notice,
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# this list of conditions and the following disclaimer in the documentation
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# and/or other materials provided with the distribution.
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#
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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# DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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# SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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# OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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import gdb
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import gdb.types
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import re
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class AKAtomic:
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def __init__(self, val):
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self.val = val
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def to_string(self):
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return self.val["m_value"]
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class AKDistinctNumeric:
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def __init__(self, val):
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self.val = val
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def to_string(self):
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return self.val["m_value"]
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class AKRefCounted:
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def __init__(self, val):
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self.val = val
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def to_string(self):
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return self.val["m_ref_count"]
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class AKString:
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def __init__(self, val):
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self.val = val
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def to_string(self):
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if int(self.val["m_impl"]["m_bits"]["m_value"]) == 0:
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return '""'
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else:
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impl = AKRefPtr(self.val["m_impl"]).get_pointee().dereference()
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return AKStringImpl(impl).to_string()
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class AKStringView:
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def __init__(self, val):
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self.val = val
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def to_string(self):
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if int(self.val["m_length"]) == 0:
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return '""'
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else:
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characters = self.val["m_characters"]
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str_type = characters.type.target().array(self.val["m_length"]).pointer()
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return str(characters.cast(str_type).dereference())
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def get_field_unalloced(val, member, type):
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# Trying to access a variable-length field seems to fail with
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# Python Exception <class 'gdb.error'> value requires 4294967296 bytes, which is more than max-value-size
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# This works around that issue.
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return gdb.parse_and_eval(f"*({type}*)(({val.type.name}*){int(val.address)})->{member}")
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class AKStringImpl:
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def __init__(self, val):
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self.val = val
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def to_string(self):
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if int(self.val["m_length"]) == 0:
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return '""'
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else:
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str_type = gdb.lookup_type("char").array(self.val["m_length"])
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return get_field_unalloced(self.val, "m_inline_buffer", str_type)
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class AKOwnPtr:
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def __init__(self, val):
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self.val = val
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def to_string(self):
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return self.val.type.name
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def children(self):
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return [('*', self.val["m_ptr"])]
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class AKRefPtr:
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def __init__(self, val):
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self.val = val
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def to_string(self):
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return self.val.type.name
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def get_pointee(self):
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inner_type = self.val.type.template_argument(0)
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inner_type_ptr = inner_type.pointer()
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return self.val["m_bits"]["m_value"].cast(inner_type_ptr)
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def children(self):
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return [('*', self.get_pointee())]
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class AKVector:
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def __init__(self, val):
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self.val = val
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def to_string(self):
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return f'{self.val.type.name} of len {int(self.val["m_size"])}'
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def children(self):
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vec_len = int(self.val["m_size"])
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if vec_len == 0:
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return []
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outline_buf = self.val["m_outline_buffer"]
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inner_type_ptr = self.val.type.template_argument(0).pointer()
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if int(outline_buf) != 0:
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elements = outline_buf.cast(inner_type_ptr)
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else:
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elements = get_field_unalloced(self.val, "m_inline_buffer_storage", inner_type_ptr)
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return [(f"[{i}]", elements[i]) for i in range(vec_len)]
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class AKHashMapPrettyPrinter:
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def __init__(self, val):
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self.val = val
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@staticmethod
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def _iter_hashtable(val, cb):
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entry_type_ptr = val.type.template_argument(0).pointer()
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buckets = val["m_buckets"]
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for i in range(0, val["m_capacity"]):
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bucket = buckets[i]
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if bucket["used"]:
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cb(bucket["storage"].cast(entry_type_ptr))
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@staticmethod
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def _iter_hashmap(val, cb):
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table = val["m_table"]
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AKHashMapPrettyPrinter._iter_hashtable(table, lambda entry: cb(entry["key"], entry["value"]))
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def to_string(self):
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return self.val.type.name
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def children(self):
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elements = []
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def cb(key, value):
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nonlocal elements
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elements.append((f"[{key}]", value))
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AKHashMapPrettyPrinter._iter_hashmap(self.val, cb)
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return elements
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class VirtualAddress:
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def __init__(self, val):
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self.val = val
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def to_string(self):
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return self.val["m_address"]
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class SerenityPrettyPrinterLocator(gdb.printing.PrettyPrinter):
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def __init__(self):
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super(SerenityPrettyPrinterLocator, self).__init__("serenity_pretty_printers", [])
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self.re = re.compile('^([^<]+)(<.*>)?$')
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def __call__(self, val):
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type = gdb.types.get_basic_type(val.type)
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typename = str(type.tag)
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match = self.re.match(typename)
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if not match:
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return None
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klass = match.group(1)
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if klass == 'AK::Atomic':
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return AKAtomic(val)
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elif klass == 'AK::DistinctNumeric':
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return AKDistinctNumeric(val)
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elif klass == 'AK::HashMap':
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return AKHashMapPrettyPrinter(val)
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elif klass == 'AK::RefCounted':
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return AKRefCounted(val)
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elif klass == 'AK::RefPtr':
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return AKRefPtr(val)
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elif klass == 'AK::OwnPtr':
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return AKOwnPtr(val)
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elif klass == 'AK::NonnullRefPtr':
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return AKRefPtr(val)
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elif klass == 'AK::String':
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return AKString(val)
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elif klass == 'AK::StringView':
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return AKStringView(val)
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elif klass == 'AK::StringImpl':
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return AKStringImpl(val)
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elif klass == 'AK::Vector':
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return AKVector(val)
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elif klass == 'VirtualAddress':
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return VirtualAddress(val)
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gdb.printing.register_pretty_printer(None, SerenityPrettyPrinterLocator(), replace=True)
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class FindThreadCmd(gdb.Command):
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"""
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Find SerenityOS thread for the specified TID.
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find_thread TID
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"""
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def __init__(self):
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super(FindThreadCmd, self).__init__(
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"find_thread", gdb.COMMAND_USER
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)
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def _find_thread(self, tid):
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threads = gdb.parse_and_eval("Kernel::Thread::g_tid_map")
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thread = None
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def cb(key, value):
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nonlocal thread
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if int(key["m_value"]) == tid:
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thread = value
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AKHashMapPrettyPrinter._iter_hashmap(threads, cb)
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return thread
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def complete(self, text, word):
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return gdb.COMPLETE_SYMBOL
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def invoke(self, args, from_tty):
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argv = gdb.string_to_argv(args)
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if len(argv) == 0:
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gdb.write("Argument required (TID).\n")
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return
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tid = int(argv[0])
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thread = self._find_thread(tid)
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if not thread:
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gdb.write(f"No thread with TID {tid} found.\n")
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else:
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gdb.write(f"{thread}\n")
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FindThreadCmd()
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