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gdb-printers.py
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209 lines (140 loc) · 5.8 KB
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import gdb
import itertools
def array_length(arr):
return int(arr.type.sizeof / arr.type.target().sizeof)
def format_array(arr):
return '[' + ']['.join([str(arr[i]) for i in range(array_length(arr))]) + ']'
class LvArrayPrinter(gdb.printing.PrettyPrinter):
"""Base printer for LvArray classes"""
def __init__(self, val):
self.val = val
def real_type(self):
return self.val.type.strip_typedefs()
def to_string(self):
return str(self.real_type())
def children(self):
return [(f.name, self.val.cast(f.type)) for f in self.real_type().fields() if f.is_base_class] \
+ [(f.name, self.val[f.name]) for f in self.real_type().fields() if not f.is_base_class]
class BufferPrinter(LvArrayPrinter):
"""Base class for printing buffer contents"""
def size(self):
raise NotImplementedError("Must override size()")
def data(self):
raise NotImplementedError("Must override data()")
def value_type(self):
return self.val.type.template_argument(0)
def __getitem__(self, key):
return self.data()[key]
def __setitem__(self, key, value):
self.data()[key] = value
def to_string(self):
return '%s of size %d' % (self.real_type(), self.size())
def children(self):
if self.data() != 0:
array_type = self.value_type().array(self.size()-1)
arr = self.data().dereference().cast(array_type)
else:
arr = self.data()
return [('gdb_view', arr)] + LvArrayPrinter.children(self)
class StackBufferPrinter(BufferPrinter):
"""Pretty-print a StackBuffer"""
def size(self):
return self.val.type.template_argument(1)
def data(self):
return self.val['m_data']
class ChaiBufferPrinter(BufferPrinter):
"""Pretty-print a ChaiBuffer"""
def size(self):
return self.val['m_capacity']
def data(self):
return self.val['m_pointer']
class MallocBufferPrinter(BufferPrinter):
"""Pretty-print a MallocBuffer"""
def size(self):
return self.val['m_capacity']
def data(self):
return self.val['m_data']
def build_buffer_printer():
pp = gdb.printing.RegexpCollectionPrettyPrinter("LvArray-buffers")
pp.add_printer('LvArray::StackBuffer', 'LvArray::StackBuffer<.*>', StackBufferPrinter)
pp.add_printer('LvArray::ChaiBuffer', 'LvArray::ChaiBuffer<.*>', ChaiBufferPrinter)
pp.add_printer('LvArray::MallocBuffer', 'LvArray::MallocBuffer<.*>', MallocBufferPrinter)
return pp
try:
import gdb.printing
buffer_printer = build_buffer_printer()
gdb.printing.register_pretty_printer(gdb.current_objfile(), buffer_printer)
except ImportError:
pass
class ArraySlicePrinter(LvArrayPrinter):
"""Pretty-print an ArraySlice"""
def value_type(self):
return self.val.type.template_argument(0)
def ndim(self):
return self.val.type.template_argument(1)
def dims(self):
return self.val['m_dims']
def strides(self):
return self.val['m_strides']
def data(self):
return self.val['m_data']
def to_string(self):
return '%s of size %s' % (self.real_type(), format_array(self.dims()))
def children(self):
array_type = self.value_type()
for i in range(self.ndim()):
array_type = array_type.array(self.dims()[self.ndim() - i - 1] - 1)
return [('gdb_view', self.data().dereference().cast(array_type))] + LvArrayPrinter.children(self)
class ArrayViewPrinter(LvArrayPrinter):
"""Pretty-print an ArrayView"""
def value_type(self):
return self.val.type.template_argument(0)
def ndim(self):
return self.val.type.template_argument(1)
def dims(self):
return self.val['m_dims']['data']
def strides(self):
return self.val['m_strides']['data']
def data(self):
return buffer_printer(self.val['m_dataBuffer']).data()
def to_string(self):
return '%s of size %s' % (self.real_type(), format_array(self.dims()))
def children(self):
array_type = self.value_type()
for i in range(self.ndim()):
array_type = array_type.array(self.dims()[self.ndim() - i - 1] - 1)
return [('gdb_view', self.data().dereference().cast(array_type))] + LvArrayPrinter.children(self)
class ArrayOfArraysViewPrinter(LvArrayPrinter):
"""Pretty-print an ArrayOfArraysView"""
def value_type(self):
return self.val.type.template_argument(0)
def data(self):
return buffer_printer(self.val['m_values']).data()
def size(self):
return self.val['m_numArrays']
def size_of_array(self, i):
return buffer_printer(self.val['m_sizes'])[i]
def offset_of_array(self, i):
return buffer_printer(self.val['m_offsets'])[i]
def ptr_to_array(self, i):
return self.data() + self.offset_of_array(i)
def get_array(self, i):
return self.ptr_to_array(i).dereference().cast(self.value_type().array(self.size_of_array(i)-1))
def to_string(self):
return '%s of size %d' % (self.real_type(), self.size())
def child_arrays(self):
for i in range(self.size()):
yield str(i), self.get_array(i)
def children(self):
return itertools.chain(LvArrayPrinter.children(self), self.child_arrays())
def build_array_printer():
pp = gdb.printing.RegexpCollectionPrettyPrinter("LvArray-arrays")
pp.add_printer('LvArray::ArraySlice', '^LvArray::ArraySlice<.*>$', ArraySlicePrinter)
pp.add_printer('LvArray::ArrayView', '^LvArray::ArrayView<.*>$', ArrayViewPrinter)
pp.add_printer('LvArray::ArrayOfArraysView', '^LvArray::ArrayOfArraysView<.*>$', ArrayOfArraysViewPrinter)
return pp
try:
import gdb.printing
gdb.printing.register_pretty_printer(gdb.current_objfile(), build_array_printer())
except ImportError:
pass