mirror of
https://github.com/python/cpython.git
synced 2025-10-23 01:43:53 +00:00
e492ae50e2
Issue #26588: * The _tracemalloc now supports tracing memory allocations of multiple address spaces (domains). * Add domain parameter to tracemalloc_add_trace() and tracemalloc_remove_trace(). * tracemalloc_add_trace() now starts by removing the previous trace, if any. * _tracemalloc._get_traces() now returns a list of (domain, size, traceback_frames): the domain is new. * Add tracemalloc.DomainFilter * tracemalloc.Filter: add an optional domain parameter to the constructor and a domain attribute * Sublte change: use Py_uintptr_t rather than void* in the traces key. * Add tracemalloc_config.use_domain, currently hardcoded to 1
524 lines
16 KiB
Python
524 lines
16 KiB
Python
from collections import Sequence, Iterable
|
|
from functools import total_ordering
|
|
import fnmatch
|
|
import linecache
|
|
import os.path
|
|
import pickle
|
|
|
|
# Import types and functions implemented in C
|
|
from _tracemalloc import *
|
|
from _tracemalloc import _get_object_traceback, _get_traces
|
|
|
|
|
|
def _format_size(size, sign):
|
|
for unit in ('B', 'KiB', 'MiB', 'GiB', 'TiB'):
|
|
if abs(size) < 100 and unit != 'B':
|
|
# 3 digits (xx.x UNIT)
|
|
if sign:
|
|
return "%+.1f %s" % (size, unit)
|
|
else:
|
|
return "%.1f %s" % (size, unit)
|
|
if abs(size) < 10 * 1024 or unit == 'TiB':
|
|
# 4 or 5 digits (xxxx UNIT)
|
|
if sign:
|
|
return "%+.0f %s" % (size, unit)
|
|
else:
|
|
return "%.0f %s" % (size, unit)
|
|
size /= 1024
|
|
|
|
|
|
class Statistic:
|
|
"""
|
|
Statistic difference on memory allocations between two Snapshot instance.
|
|
"""
|
|
|
|
__slots__ = ('traceback', 'size', 'count')
|
|
|
|
def __init__(self, traceback, size, count):
|
|
self.traceback = traceback
|
|
self.size = size
|
|
self.count = count
|
|
|
|
def __hash__(self):
|
|
return hash((self.traceback, self.size, self.count))
|
|
|
|
def __eq__(self, other):
|
|
return (self.traceback == other.traceback
|
|
and self.size == other.size
|
|
and self.count == other.count)
|
|
|
|
def __str__(self):
|
|
text = ("%s: size=%s, count=%i"
|
|
% (self.traceback,
|
|
_format_size(self.size, False),
|
|
self.count))
|
|
if self.count:
|
|
average = self.size / self.count
|
|
text += ", average=%s" % _format_size(average, False)
|
|
return text
|
|
|
|
def __repr__(self):
|
|
return ('<Statistic traceback=%r size=%i count=%i>'
|
|
% (self.traceback, self.size, self.count))
|
|
|
|
def _sort_key(self):
|
|
return (self.size, self.count, self.traceback)
|
|
|
|
|
|
class StatisticDiff:
|
|
"""
|
|
Statistic difference on memory allocations between an old and a new
|
|
Snapshot instance.
|
|
"""
|
|
__slots__ = ('traceback', 'size', 'size_diff', 'count', 'count_diff')
|
|
|
|
def __init__(self, traceback, size, size_diff, count, count_diff):
|
|
self.traceback = traceback
|
|
self.size = size
|
|
self.size_diff = size_diff
|
|
self.count = count
|
|
self.count_diff = count_diff
|
|
|
|
def __hash__(self):
|
|
return hash((self.traceback, self.size, self.size_diff,
|
|
self.count, self.count_diff))
|
|
|
|
def __eq__(self, other):
|
|
return (self.traceback == other.traceback
|
|
and self.size == other.size
|
|
and self.size_diff == other.size_diff
|
|
and self.count == other.count
|
|
and self.count_diff == other.count_diff)
|
|
|
|
def __str__(self):
|
|
text = ("%s: size=%s (%s), count=%i (%+i)"
|
|
% (self.traceback,
|
|
_format_size(self.size, False),
|
|
_format_size(self.size_diff, True),
|
|
self.count,
|
|
self.count_diff))
|
|
if self.count:
|
|
average = self.size / self.count
|
|
text += ", average=%s" % _format_size(average, False)
|
|
return text
|
|
|
|
def __repr__(self):
|
|
return ('<StatisticDiff traceback=%r size=%i (%+i) count=%i (%+i)>'
|
|
% (self.traceback, self.size, self.size_diff,
|
|
self.count, self.count_diff))
|
|
|
|
def _sort_key(self):
|
|
return (abs(self.size_diff), self.size,
|
|
abs(self.count_diff), self.count,
|
|
self.traceback)
|
|
|
|
|
|
def _compare_grouped_stats(old_group, new_group):
|
|
statistics = []
|
|
for traceback, stat in new_group.items():
|
|
previous = old_group.pop(traceback, None)
|
|
if previous is not None:
|
|
stat = StatisticDiff(traceback,
|
|
stat.size, stat.size - previous.size,
|
|
stat.count, stat.count - previous.count)
|
|
else:
|
|
stat = StatisticDiff(traceback,
|
|
stat.size, stat.size,
|
|
stat.count, stat.count)
|
|
statistics.append(stat)
|
|
|
|
for traceback, stat in old_group.items():
|
|
stat = StatisticDiff(traceback, 0, -stat.size, 0, -stat.count)
|
|
statistics.append(stat)
|
|
return statistics
|
|
|
|
|
|
@total_ordering
|
|
class Frame:
|
|
"""
|
|
Frame of a traceback.
|
|
"""
|
|
__slots__ = ("_frame",)
|
|
|
|
def __init__(self, frame):
|
|
# frame is a tuple: (filename: str, lineno: int)
|
|
self._frame = frame
|
|
|
|
@property
|
|
def filename(self):
|
|
return self._frame[0]
|
|
|
|
@property
|
|
def lineno(self):
|
|
return self._frame[1]
|
|
|
|
def __eq__(self, other):
|
|
return (self._frame == other._frame)
|
|
|
|
def __lt__(self, other):
|
|
return (self._frame < other._frame)
|
|
|
|
def __hash__(self):
|
|
return hash(self._frame)
|
|
|
|
def __str__(self):
|
|
return "%s:%s" % (self.filename, self.lineno)
|
|
|
|
def __repr__(self):
|
|
return "<Frame filename=%r lineno=%r>" % (self.filename, self.lineno)
|
|
|
|
|
|
@total_ordering
|
|
class Traceback(Sequence):
|
|
"""
|
|
Sequence of Frame instances sorted from the most recent frame
|
|
to the oldest frame.
|
|
"""
|
|
__slots__ = ("_frames",)
|
|
|
|
def __init__(self, frames):
|
|
Sequence.__init__(self)
|
|
# frames is a tuple of frame tuples: see Frame constructor for the
|
|
# format of a frame tuple
|
|
self._frames = frames
|
|
|
|
def __len__(self):
|
|
return len(self._frames)
|
|
|
|
def __getitem__(self, index):
|
|
if isinstance(index, slice):
|
|
return tuple(Frame(trace) for trace in self._frames[index])
|
|
else:
|
|
return Frame(self._frames[index])
|
|
|
|
def __contains__(self, frame):
|
|
return frame._frame in self._frames
|
|
|
|
def __hash__(self):
|
|
return hash(self._frames)
|
|
|
|
def __eq__(self, other):
|
|
return (self._frames == other._frames)
|
|
|
|
def __lt__(self, other):
|
|
return (self._frames < other._frames)
|
|
|
|
def __str__(self):
|
|
return str(self[0])
|
|
|
|
def __repr__(self):
|
|
return "<Traceback %r>" % (tuple(self),)
|
|
|
|
def format(self, limit=None):
|
|
lines = []
|
|
if limit is not None and limit < 0:
|
|
return lines
|
|
for frame in self[:limit]:
|
|
lines.append(' File "%s", line %s'
|
|
% (frame.filename, frame.lineno))
|
|
line = linecache.getline(frame.filename, frame.lineno).strip()
|
|
if line:
|
|
lines.append(' %s' % line)
|
|
return lines
|
|
|
|
|
|
def get_object_traceback(obj):
|
|
"""
|
|
Get the traceback where the Python object *obj* was allocated.
|
|
Return a Traceback instance.
|
|
|
|
Return None if the tracemalloc module is not tracing memory allocations or
|
|
did not trace the allocation of the object.
|
|
"""
|
|
frames = _get_object_traceback(obj)
|
|
if frames is not None:
|
|
return Traceback(frames)
|
|
else:
|
|
return None
|
|
|
|
|
|
class Trace:
|
|
"""
|
|
Trace of a memory block.
|
|
"""
|
|
__slots__ = ("_trace",)
|
|
|
|
def __init__(self, trace):
|
|
# trace is a tuple: (domain: int, size: int, traceback: tuple).
|
|
# See Traceback constructor for the format of the traceback tuple.
|
|
self._trace = trace
|
|
|
|
@property
|
|
def domain(self):
|
|
return self._trace[0]
|
|
|
|
@property
|
|
def size(self):
|
|
return self._trace[1]
|
|
|
|
@property
|
|
def traceback(self):
|
|
return Traceback(self._trace[2])
|
|
|
|
def __eq__(self, other):
|
|
return (self._trace == other._trace)
|
|
|
|
def __hash__(self):
|
|
return hash(self._trace)
|
|
|
|
def __str__(self):
|
|
return "%s: %s" % (self.traceback, _format_size(self.size, False))
|
|
|
|
def __repr__(self):
|
|
return ("<Trace domain=%s size=%s, traceback=%r>"
|
|
% (self.domain, _format_size(self.size, False), self.traceback))
|
|
|
|
|
|
class _Traces(Sequence):
|
|
def __init__(self, traces):
|
|
Sequence.__init__(self)
|
|
# traces is a tuple of trace tuples: see Trace constructor
|
|
self._traces = traces
|
|
|
|
def __len__(self):
|
|
return len(self._traces)
|
|
|
|
def __getitem__(self, index):
|
|
if isinstance(index, slice):
|
|
return tuple(Trace(trace) for trace in self._traces[index])
|
|
else:
|
|
return Trace(self._traces[index])
|
|
|
|
def __contains__(self, trace):
|
|
return trace._trace in self._traces
|
|
|
|
def __eq__(self, other):
|
|
return (self._traces == other._traces)
|
|
|
|
def __repr__(self):
|
|
return "<Traces len=%s>" % len(self)
|
|
|
|
|
|
def _normalize_filename(filename):
|
|
filename = os.path.normcase(filename)
|
|
if filename.endswith('.pyc'):
|
|
filename = filename[:-1]
|
|
return filename
|
|
|
|
|
|
class BaseFilter:
|
|
def __init__(self, inclusive):
|
|
self.inclusive = inclusive
|
|
|
|
def _match(self, trace):
|
|
raise NotImplementedError
|
|
|
|
|
|
class Filter(BaseFilter):
|
|
def __init__(self, inclusive, filename_pattern,
|
|
lineno=None, all_frames=False, domain=None):
|
|
super().__init__(inclusive)
|
|
self.inclusive = inclusive
|
|
self._filename_pattern = _normalize_filename(filename_pattern)
|
|
self.lineno = lineno
|
|
self.all_frames = all_frames
|
|
self.domain = domain
|
|
|
|
@property
|
|
def filename_pattern(self):
|
|
return self._filename_pattern
|
|
|
|
def _match_frame_impl(self, filename, lineno):
|
|
filename = _normalize_filename(filename)
|
|
if not fnmatch.fnmatch(filename, self._filename_pattern):
|
|
return False
|
|
if self.lineno is None:
|
|
return True
|
|
else:
|
|
return (lineno == self.lineno)
|
|
|
|
def _match_frame(self, filename, lineno):
|
|
return self._match_frame_impl(filename, lineno) ^ (not self.inclusive)
|
|
|
|
def _match_traceback(self, traceback):
|
|
if self.all_frames:
|
|
if any(self._match_frame_impl(filename, lineno)
|
|
for filename, lineno in traceback):
|
|
return self.inclusive
|
|
else:
|
|
return (not self.inclusive)
|
|
else:
|
|
filename, lineno = traceback[0]
|
|
return self._match_frame(filename, lineno)
|
|
|
|
def _match(self, trace):
|
|
domain, size, traceback = trace
|
|
res = self._match_traceback(traceback)
|
|
if self.domain is not None:
|
|
if self.inclusive:
|
|
return res and (domain == self.domain)
|
|
else:
|
|
return res or (domain != self.domain)
|
|
return res
|
|
|
|
|
|
class DomainFilter(BaseFilter):
|
|
def __init__(self, inclusive, domain):
|
|
super().__init__(inclusive)
|
|
self._domain = domain
|
|
|
|
@property
|
|
def domain(self):
|
|
return self._domain
|
|
|
|
def _match(self, trace):
|
|
domain, size, traceback = trace
|
|
return (domain == self.domain) ^ (not self.inclusive)
|
|
|
|
|
|
class Snapshot:
|
|
"""
|
|
Snapshot of traces of memory blocks allocated by Python.
|
|
"""
|
|
|
|
def __init__(self, traces, traceback_limit):
|
|
# traces is a tuple of trace tuples: see _Traces constructor for
|
|
# the exact format
|
|
self.traces = _Traces(traces)
|
|
self.traceback_limit = traceback_limit
|
|
|
|
def dump(self, filename):
|
|
"""
|
|
Write the snapshot into a file.
|
|
"""
|
|
with open(filename, "wb") as fp:
|
|
pickle.dump(self, fp, pickle.HIGHEST_PROTOCOL)
|
|
|
|
@staticmethod
|
|
def load(filename):
|
|
"""
|
|
Load a snapshot from a file.
|
|
"""
|
|
with open(filename, "rb") as fp:
|
|
return pickle.load(fp)
|
|
|
|
def _filter_trace(self, include_filters, exclude_filters, trace):
|
|
if include_filters:
|
|
if not any(trace_filter._match(trace)
|
|
for trace_filter in include_filters):
|
|
return False
|
|
if exclude_filters:
|
|
if any(not trace_filter._match(trace)
|
|
for trace_filter in exclude_filters):
|
|
return False
|
|
return True
|
|
|
|
def filter_traces(self, filters):
|
|
"""
|
|
Create a new Snapshot instance with a filtered traces sequence, filters
|
|
is a list of Filter or DomainFilter instances. If filters is an empty
|
|
list, return a new Snapshot instance with a copy of the traces.
|
|
"""
|
|
if not isinstance(filters, Iterable):
|
|
raise TypeError("filters must be a list of filters, not %s"
|
|
% type(filters).__name__)
|
|
if filters:
|
|
include_filters = []
|
|
exclude_filters = []
|
|
for trace_filter in filters:
|
|
if trace_filter.inclusive:
|
|
include_filters.append(trace_filter)
|
|
else:
|
|
exclude_filters.append(trace_filter)
|
|
new_traces = [trace for trace in self.traces._traces
|
|
if self._filter_trace(include_filters,
|
|
exclude_filters,
|
|
trace)]
|
|
else:
|
|
new_traces = self.traces._traces.copy()
|
|
return Snapshot(new_traces, self.traceback_limit)
|
|
|
|
def _group_by(self, key_type, cumulative):
|
|
if key_type not in ('traceback', 'filename', 'lineno'):
|
|
raise ValueError("unknown key_type: %r" % (key_type,))
|
|
if cumulative and key_type not in ('lineno', 'filename'):
|
|
raise ValueError("cumulative mode cannot by used "
|
|
"with key type %r" % key_type)
|
|
|
|
stats = {}
|
|
tracebacks = {}
|
|
if not cumulative:
|
|
for trace in self.traces._traces:
|
|
domain, size, trace_traceback = trace
|
|
try:
|
|
traceback = tracebacks[trace_traceback]
|
|
except KeyError:
|
|
if key_type == 'traceback':
|
|
frames = trace_traceback
|
|
elif key_type == 'lineno':
|
|
frames = trace_traceback[:1]
|
|
else: # key_type == 'filename':
|
|
frames = ((trace_traceback[0][0], 0),)
|
|
traceback = Traceback(frames)
|
|
tracebacks[trace_traceback] = traceback
|
|
try:
|
|
stat = stats[traceback]
|
|
stat.size += size
|
|
stat.count += 1
|
|
except KeyError:
|
|
stats[traceback] = Statistic(traceback, size, 1)
|
|
else:
|
|
# cumulative statistics
|
|
for trace in self.traces._traces:
|
|
domain, size, trace_traceback = trace
|
|
for frame in trace_traceback:
|
|
try:
|
|
traceback = tracebacks[frame]
|
|
except KeyError:
|
|
if key_type == 'lineno':
|
|
frames = (frame,)
|
|
else: # key_type == 'filename':
|
|
frames = ((frame[0], 0),)
|
|
traceback = Traceback(frames)
|
|
tracebacks[frame] = traceback
|
|
try:
|
|
stat = stats[traceback]
|
|
stat.size += size
|
|
stat.count += 1
|
|
except KeyError:
|
|
stats[traceback] = Statistic(traceback, size, 1)
|
|
return stats
|
|
|
|
def statistics(self, key_type, cumulative=False):
|
|
"""
|
|
Group statistics by key_type. Return a sorted list of Statistic
|
|
instances.
|
|
"""
|
|
grouped = self._group_by(key_type, cumulative)
|
|
statistics = list(grouped.values())
|
|
statistics.sort(reverse=True, key=Statistic._sort_key)
|
|
return statistics
|
|
|
|
def compare_to(self, old_snapshot, key_type, cumulative=False):
|
|
"""
|
|
Compute the differences with an old snapshot old_snapshot. Get
|
|
statistics as a sorted list of StatisticDiff instances, grouped by
|
|
group_by.
|
|
"""
|
|
new_group = self._group_by(key_type, cumulative)
|
|
old_group = old_snapshot._group_by(key_type, cumulative)
|
|
statistics = _compare_grouped_stats(old_group, new_group)
|
|
statistics.sort(reverse=True, key=StatisticDiff._sort_key)
|
|
return statistics
|
|
|
|
|
|
def take_snapshot():
|
|
"""
|
|
Take a snapshot of traces of memory blocks allocated by Python.
|
|
"""
|
|
if not is_tracing():
|
|
raise RuntimeError("the tracemalloc module must be tracing memory "
|
|
"allocations to take a snapshot")
|
|
traces = _get_traces()
|
|
traceback_limit = get_traceback_limit()
|
|
return Snapshot(traces, traceback_limit)
|