304 lines
9 KiB
Python
304 lines
9 KiB
Python
# -*- coding: utf-8 -*-
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#
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# Copyright (c) 2016 Microsoft Corporation. All rights reserved.
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# Released under Apache 2.0 license as described in the file LICENSE.
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#
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# Authors: Sebastian Ullrich, Gabriel Ebner
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#
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import gdb
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import gdb.printing
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def is_scalar(o):
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return o.cast(gdb.lookup_type('uintptr_t')) & 1 == 1
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def box(n):
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return gdb.Value(n << 1 | 1).cast(gdb.lookup_type('lean::object').pointer())
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def unbox(o):
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return o.cast(gdb.lookup_type('uintptr_t')) >> 1
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def to_cnstr(o):
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return o.cast(gdb.lookup_type('lean::constructor_object').pointer())
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def get_cnstr_tag(o):
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return to_cnstr(o).dereference()['m_tag']
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char_p = gdb.lookup_type('char').pointer()
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def get_cnstr_obj_arg(o, i):
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return (o.cast(char_p) + gdb.lookup_type('lean::constructor_object').sizeof).cast(gdb.lookup_type('lean::object').pointer().pointer())[i]
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def get_closure_arg(o, i):
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return (o.cast(char_p) + gdb.lookup_type('lean::closure_object').sizeof).cast(gdb.lookup_type('lean::object').pointer().pointer())[i]
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def get_c_str(o):
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return (o.cast(char_p) + gdb.lookup_type('lean::string_object').sizeof)
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def get_rc(o):
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return (o.cast(gdb.lookup_type('uintptr_t').pointer()) - 1).dereference()
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class LeanObjectPrinter:
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"""Print a lean::object object."""
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kinds = [
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('constructor', ['m_tag', 'm_scalar_size']),
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('closure', ['m_arity', 'm_fun']),
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('array', []),
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('sarray', []),
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('parray_root', []),
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('parray_set', []),
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('parray_push', []),
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('parray_pop', []),
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('string', ['m_size', 'm_capacity', 'm_length']),
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('mpz', ['m_value']),
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('thunk', ['m_value', 'm_closure']),
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('external', []),
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]
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def __init__(self, val):
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self.val = val.address
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if not is_scalar(self.val):
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self.kind = int(self.val.dereference()['m_kind'])
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def to_string(self):
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if is_scalar(self.val):
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return unbox(self.val)
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else:
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return "{} (RC {})".format(LeanObjectPrinter.kinds[self.kind][0], get_rc(self.val))
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def children(self):
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if is_scalar(self.val):
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return
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yield ('RC', get_rc(self.val))
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if self.kind >= len(LeanObjectPrinter.kinds):
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return
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typ, fields = LeanObjectPrinter.kinds[self.kind]
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if fields:
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val = self.val.cast(gdb.lookup_type("lean::" + typ + "_object").pointer()).dereference()
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for f in fields:
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yield (f, val[f])
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if typ == 'constructor':
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for i in range(val['m_num_objs']):
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yield ('', get_cnstr_obj_arg(self.val, i))
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elif typ == 'closure':
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for i in range(val['m_num_fixed']):
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yield ('', get_closure_arg(self.val, i))
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class LeanOptionalPrinter:
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"""Print a lean::optional object."""
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def __init__(self, val):
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self.val = val
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def get_val(self):
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if hasattr(self.val, 'm_some'):
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if not self.val['m_some']:
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return None
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elif not self.val['m_value'].cast(gdb.lookup_type('char').pointer()):
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return None
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return self.val['m_value']
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def children(self):
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val = self.get_val()
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return [('', val)] if val else []
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def to_string(self):
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return str(self.val.type)
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class LeanNamePrinter:
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"""Print a lean::name object."""
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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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def rec(o):
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prefix = get_cnstr_obj_arg(o, 0)
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part = get_cnstr_obj_arg(o, 1)
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s = ("'%s'" % get_c_str(part).string()) if get_cnstr_tag(o) == 1 else str(unbox(part))
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if not is_scalar(prefix):
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return "%s.%s" % (rec(prefix), s)
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else:
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return s
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if is_scalar(self.val['m_obj']):
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return ""
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else:
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return rec(self.val['m_obj'])
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class LeanExprPrinter:
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"""Print a lean::expr object."""
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expr_kinds = [
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('bvar', [('idx', 'nat')]),
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('fvar', ['name']),
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('mvar', ['name', ('type', 'expr')]),
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('sort', ['level']),
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('const', ['name', ('levels', 'list_ref<lean::level>')]),
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('app', [('fn', 'expr'), ('arg', 'expr')]),
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('lam', ['name', ('type', 'expr'), ('body', 'expr')]),
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('pi', ['name', ('type', 'expr'), ('body', 'expr')]),
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('let', ['name', ('type', 'expr'), ('val', 'expr'), ('body', 'expr')]),
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('lit', ['literal']),
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('mdata', ['kvmap', 'expr']),
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('proj', ['name', 'nat', 'expr']),
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]
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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 'lean::expr[{}]'.format(LeanExprPrinter.expr_kinds[get_cnstr_tag(self.val['m_obj'])][0])
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def children(self):
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_, fields = LeanExprPrinter.expr_kinds[get_cnstr_tag(self.val['m_obj'])]
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for i, f in enumerate(fields):
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if isinstance(f, tuple):
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name, typ = f
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else:
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name, typ = f, f
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yield (name, get_cnstr_obj_arg(self.val['m_obj'], i).cast(gdb.lookup_type('lean::' + typ)))
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class LeanLevelPrinter:
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"""Print a lean::level object."""
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level_kinds = [
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('lean::level_cell', 'zero', []),
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('lean::level_succ', 'succ', ['m_l']),
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('lean::level_max_core', 'max', ['m_lhs', 'm_rhs']),
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('lean::level_max_core', 'imax', ['m_lhs', 'm_rhs']),
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('lean::level_param_core', 'param', ['m_id']),
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('lean::level_param_core', 'meta', ['m_id']),
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]
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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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kind = int(self.val['m_obj']['m_kind'])
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(subtype, name, fields) = LeanLevelPrinter.level_kinds[kind]
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subtype = gdb.lookup_type(subtype)
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val = self.val['m_obj'].cast(subtype.pointer()).dereference()
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return "({})".format(" ".join([name] + [str(val[field]) for field in fields]))
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class LeanListPrinter:
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"""Print a lean::list object."""
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def __init__(self, val):
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self.val = val
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def children(self):
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l = self.val
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i = 0
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while l['m_obj']:
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cell = l['m_obj'].dereference()
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yield ('[%s]' % i, cell['m_head'])
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l = cell['m_tail']
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i += 1
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def to_string(self):
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return str(self.val.type)
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def display_hint(self):
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return 'array'
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class LeanBufferPrinter:
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"""Print a lean::buffer object."""
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def __init__(self, val):
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self.val = val
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def children(self):
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p = self.val['m_buffer']
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for i in range(int(self.val['m_pos'])):
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yield ('[%s]' % i, p.dereference())
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p += 1
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def to_string(self):
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return str(self.val.type)
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def display_hint(self):
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return 'array'
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class LeanListRefPrinter:
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"""Print a lean::list_ref object."""
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def __init__(self, val):
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self.val = val
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def children(self):
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l = self.val['m_obj']
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i = 0
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while not is_scalar(l):
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yield ('[%s]' % i, get_cnstr_obj_arg(l, 0).cast(self.val.type.template_argument(0)))
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l = get_cnstr_obj_arg(l, 1)
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i += 1
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def to_string(self):
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return str(self.val.type)
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def display_hint(self):
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return 'array'
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class LeanRBTreePrinter:
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"""Print a lean::rb_tree object."""
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def __init__(self, val):
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self.val = val
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def children(self):
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def rec(node):
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if node['m_ptr']:
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cell = node['m_ptr'].dereference()
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for i in rec(cell['m_left']): yield i
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yield ('', cell['m_value'])
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for i in rec(cell['m_right']): yield i
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return rec(self.val['m_root'])
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def to_string(self):
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return 'lean::rb_tree' # full type is way too verbose
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def display_hint(self):
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return 'array'
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class LeanRBMapPrinter:
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"""Print a lean::rb_map object."""
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def __init__(self, val):
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self.val = val
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def children(self):
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for (_, child) in LeanRBTreePrinter(self.val['m_map']).children():
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yield ('', child['first'])
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yield ('', child['second'])
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def to_string(self):
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return 'lean::rb_map' # full type is way too verbose
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def display_hint(self):
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return 'map'
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def build_pretty_printer():
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pp = gdb.printing.RegexpCollectionPrettyPrinter("lean")
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pp.add_printer('object', '^lean::object$', LeanObjectPrinter)
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pp.add_printer('optional', '^lean::optional', LeanOptionalPrinter)
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pp.add_printer('name', '^lean::name$', LeanNamePrinter)
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pp.add_printer('expr', '^lean::expr$', LeanExprPrinter)
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#pp.add_printer('level', '^lean::level$', LeanLevelPrinter)
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#pp.add_printer('list', '^lean::list', LeanListPrinter)
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pp.add_printer('buffer', '^lean::buffer', LeanBufferPrinter)
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pp.add_printer('list_ref', '^lean::list_ref', LeanListRefPrinter)
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pp.add_printer('rb_tree', '^lean::rb_tree', LeanRBTreePrinter)
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pp.add_printer('rb_map', '^lean::rb_map', LeanRBMapPrinter)
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return pp
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def register():
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gdb.printing.register_pretty_printer(
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gdb.current_objfile(),
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build_pretty_printer(),
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replace=True)
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register()
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