1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
|
"""
Utility RPython functions to inspect objects in the GC.
"""
from pypy.rpython.lltypesystem import lltype, llmemory, rffi
from pypy.rlib.objectmodel import free_non_gc_object
from pypy.rpython.module.ll_os import underscore_on_windows
from pypy.rlib import rposix
from pypy.rpython.memory.support import AddressDict, get_address_stack
# ---------- implementation of pypy.rlib.rgc.get_rpy_roots() ----------
def _counting_rpy_root(gc, root):
gc._count_rpy += 1
def _do_count_rpy_roots(gc):
gc._count_rpy = 0
gc.root_walker.walk_roots(
_counting_rpy_root,
_counting_rpy_root,
_counting_rpy_root)
return gc._count_rpy
def _append_rpy_root(gc, root):
# Can use the gc list, but should not allocate!
# It is essential that the list is not resizable!
lst = gc._list_rpy
index = gc._count_rpy
if index >= len(lst):
raise ValueError
gc._count_rpy = index + 1
lst[index] = llmemory.cast_adr_to_ptr(root.address[0], llmemory.GCREF)
def _do_append_rpy_roots(gc, lst):
gc._count_rpy = 0
gc._list_rpy = lst
gc.root_walker.walk_roots(
_append_rpy_root,
_append_rpy_root,
_append_rpy_root)
gc._list_rpy = None
def get_rpy_roots(gc):
count = _do_count_rpy_roots(gc)
extra = 16
while True:
result = [lltype.nullptr(llmemory.GCREF.TO)] * (count + extra)
try:
_do_append_rpy_roots(gc, result)
except ValueError:
extra *= 3
else:
return result
# ---------- implementation of pypy.rlib.rgc.get_rpy_referents() ----------
def _count_rpy_referent(pointer, gc):
gc._count_rpy += 1
def _do_count_rpy_referents(gc, gcref):
gc._count_rpy = 0
gc.trace(llmemory.cast_ptr_to_adr(gcref), _count_rpy_referent, gc)
return gc._count_rpy
def _append_rpy_referent(pointer, gc):
# Can use the gc list, but should not allocate!
# It is essential that the list is not resizable!
lst = gc._list_rpy
index = gc._count_rpy
if index >= len(lst):
raise ValueError
gc._count_rpy = index + 1
lst[index] = llmemory.cast_adr_to_ptr(pointer.address[0],
llmemory.GCREF)
def _do_append_rpy_referents(gc, gcref, lst):
gc._count_rpy = 0
gc._list_rpy = lst
gc.trace(llmemory.cast_ptr_to_adr(gcref), _append_rpy_referent, gc)
def get_rpy_referents(gc, gcref):
count = _do_count_rpy_referents(gc, gcref)
result = [lltype.nullptr(llmemory.GCREF.TO)] * count
_do_append_rpy_referents(gc, gcref, result)
return result
# ----------
def get_rpy_memory_usage(gc, gcref):
return gc.get_size_incl_hash(llmemory.cast_ptr_to_adr(gcref))
def get_rpy_type_index(gc, gcref):
typeid = gc.get_type_id(llmemory.cast_ptr_to_adr(gcref))
return gc.get_member_index(typeid)
def is_rpy_instance(gc, gcref):
typeid = gc.get_type_id(llmemory.cast_ptr_to_adr(gcref))
return gc.is_rpython_class(typeid)
# ----------
raw_os_write = rffi.llexternal(underscore_on_windows+'write',
[rffi.INT, llmemory.Address, rffi.SIZE_T],
rffi.SIZE_T,
sandboxsafe=True, _nowrapper=True)
AddressStack = get_address_stack()
class HeapDumper:
_alloc_flavor_ = "raw"
BUFSIZE = 8192 # words
def __init__(self, gc, fd):
self.gc = gc
self.fd = rffi.cast(rffi.INT, fd)
self.writebuffer = lltype.malloc(rffi.LONGP.TO, self.BUFSIZE,
flavor='raw')
self.buf_count = 0
self.seen = AddressDict()
self.pending = AddressStack()
def delete(self):
self.seen.delete()
self.pending.delete()
lltype.free(self.writebuffer, flavor='raw')
free_non_gc_object(self)
def flush(self):
if self.buf_count > 0:
bytes = self.buf_count * rffi.sizeof(rffi.LONG)
count = raw_os_write(self.fd,
rffi.cast(llmemory.Address, self.writebuffer),
rffi.cast(rffi.SIZE_T, bytes))
if rffi.cast(lltype.Signed, count) != bytes:
raise OSError(rposix.get_errno(), "raw_os_write failed")
self.buf_count = 0
flush._dont_inline_ = True
def write(self, value):
x = self.buf_count
self.writebuffer[x] = value
x += 1
self.buf_count = x
if x == self.BUFSIZE:
self.flush()
write._always_inline_ = True
def write_marker(self):
self.write(0)
self.write(0)
self.write(0)
self.write(-1)
def writeobj(self, obj):
gc = self.gc
typeid = gc.get_type_id(obj)
self.write(llmemory.cast_adr_to_int(obj))
self.write(gc.get_member_index(typeid))
self.write(gc.get_size_incl_hash(obj))
gc.trace(obj, self._writeref, None)
self.write(-1)
def _writeref(self, pointer, _):
obj = pointer.address[0]
self.write(llmemory.cast_adr_to_int(obj))
self.add(obj)
def add(self, obj):
if not self.seen.contains(obj):
self.seen.setitem(obj, obj)
self.pending.append(obj)
def add_roots(self):
self.gc._heap_dumper = self
self.gc.root_walker.walk_roots(
_hd_add_root,
_hd_add_root,
_hd_add_root)
self.gc._heap_dumper = None
pendingroots = self.pending
self.pending = AddressStack()
self.walk(pendingroots)
pendingroots.delete()
self.write_marker()
def walk(self, pending):
while pending.non_empty():
self.writeobj(pending.pop())
def _hd_add_root(gc, root):
gc._heap_dumper.add(root.address[0])
def dump_rpy_heap(gc, fd):
heapdumper = HeapDumper(gc, fd)
heapdumper.add_roots()
heapdumper.walk(heapdumper.pending)
heapdumper.flush()
heapdumper.delete()
return True
|
GitWeb