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import subprocess
import sys
import textwrap
from pathlib import Path
import pytest
from memray import AllocatorType
from memray import FileReader
from tests.utils import filter_relevant_allocations
pytestmark = pytest.mark.skipif(
sys.version_info >= (3, 14), reason="Greenlet does not yet support Python 3.14"
)
def test_integration_with_greenlet(tmpdir):
"""Verify that we can track Python stacks when greenlet is in use."""
# GIVEN
output = Path(tmpdir) / "test.bin"
subprocess_code = textwrap.dedent(
f"""
import greenlet
from memray import Tracker
from memray._test import MemoryAllocator
def apple():
banana()
def banana():
allocator.valloc(1024 * 10)
animal.switch()
allocator.valloc(1024 * 30)
def ant():
allocator.valloc(1024 * 20)
fruit.switch()
allocator.valloc(1024 * 40)
bat()
allocator.valloc(1024 * 60)
def bat():
allocator.valloc(1024 * 50)
def test():
fruit.switch()
assert fruit.dead
animal.switch()
assert animal.dead
allocator.valloc(1024 * 70)
allocator = MemoryAllocator()
output = "{output}"
with Tracker(output):
fruit = greenlet.greenlet(apple)
animal = greenlet.greenlet(ant)
test()
"""
)
# WHEN
subprocess.run([sys.executable, "-Xdev", "-c", subprocess_code], timeout=5)
# THEN
reader = FileReader(output)
records = list(reader.get_allocation_records())
vallocs = [
record
for record in filter_relevant_allocations(records)
if record.allocator == AllocatorType.VALLOC
]
def stack(alloc):
return [frame[0] for frame in alloc.stack_trace()]
assert stack(vallocs[0]) == ["valloc", "banana", "apple"]
assert vallocs[0].size == 10 * 1024
assert stack(vallocs[1]) == ["valloc", "ant"]
assert vallocs[1].size == 20 * 1024
assert stack(vallocs[2]) == ["valloc", "banana", "apple"]
assert vallocs[2].size == 30 * 1024
assert stack(vallocs[3]) == ["valloc", "ant"]
assert vallocs[3].size == 40 * 1024
assert stack(vallocs[4]) == ["valloc", "bat", "ant"]
assert vallocs[4].size == 50 * 1024
assert stack(vallocs[5]) == ["valloc", "ant"]
assert vallocs[5].size == 60 * 1024
assert stack(vallocs[6]) == ["valloc", "test", "<module>"]
assert vallocs[6].size == 70 * 1024
def test_importing_greenlet_after_tracking_starts(tmpdir):
# GIVEN
output = Path(tmpdir) / "test.bin"
subprocess_code = textwrap.dedent(
f"""
from memray import Tracker
from memray._test import MemoryAllocator
def apple():
banana()
def banana():
allocator.valloc(1024 * 10)
animal.switch()
allocator.valloc(1024 * 30)
def ant():
allocator.valloc(1024 * 20)
fruit.switch()
allocator.valloc(1024 * 40)
bat()
allocator.valloc(1024 * 60)
def bat():
allocator.valloc(1024 * 50)
def test():
fruit.switch()
assert fruit.dead
animal.switch()
assert animal.dead
allocator.valloc(1024 * 70)
allocator = MemoryAllocator()
output = "{output}"
with Tracker(output):
import greenlet
fruit = greenlet.greenlet(apple)
animal = greenlet.greenlet(ant)
test()
"""
)
# WHEN
subprocess.run([sys.executable, "-Xdev", "-c", subprocess_code], timeout=5)
# THEN
reader = FileReader(output)
records = list(reader.get_allocation_records())
vallocs = [
record
for record in filter_relevant_allocations(records)
if record.allocator == AllocatorType.VALLOC
]
def stack(alloc):
return [frame[0] for frame in alloc.stack_trace()]
assert stack(vallocs[0]) == ["valloc", "banana", "apple"]
assert vallocs[0].size == 10 * 1024
assert stack(vallocs[1]) == ["valloc", "ant"]
assert vallocs[1].size == 20 * 1024
assert stack(vallocs[2]) == ["valloc", "banana", "apple"]
assert vallocs[2].size == 30 * 1024
assert stack(vallocs[3]) == ["valloc", "ant"]
assert vallocs[3].size == 40 * 1024
assert stack(vallocs[4]) == ["valloc", "bat", "ant"]
assert vallocs[4].size == 50 * 1024
assert stack(vallocs[5]) == ["valloc", "ant"]
assert vallocs[5].size == 60 * 1024
assert stack(vallocs[6]) == ["valloc", "test", "<module>"]
assert vallocs[6].size == 70 * 1024
# 0 and 2 are fruit, 1 and 3 and 4 and 5 are animal, 6 is main.
assert vallocs[0].tid != vallocs[1].tid != vallocs[6].tid
assert vallocs[0].tid == vallocs[2].tid
assert vallocs[1].tid == vallocs[3].tid == vallocs[4].tid == vallocs[5].tid
def test_uninstall_profile_in_greenlet(tmpdir):
"""Verify that memray handles profile function changes in greenlets correctly."""
# GIVEN
output = Path(tmpdir) / "test.bin"
subprocess_code = textwrap.dedent(
f"""
import greenlet
import sys
from memray import Tracker
from memray._test import MemoryAllocator
def foo():
bar()
allocator.valloc(1024 * 10)
def bar():
baz()
def baz():
sys.setprofile(None)
other.switch()
def test():
allocator.valloc(1024 * 70)
main_greenlet.switch()
allocator = MemoryAllocator()
output = "{output}"
with Tracker(output):
main_greenlet = greenlet.getcurrent()
other = greenlet.greenlet(test)
foo()
"""
)
# WHEN
subprocess.run([sys.executable, "-Xdev", "-c", subprocess_code], timeout=5)
# THEN
reader = FileReader(output)
records = list(reader.get_allocation_records())
vallocs = [
record
for record in filter_relevant_allocations(records)
if record.allocator == AllocatorType.VALLOC
]
def stack(alloc):
return [frame[0] for frame in alloc.stack_trace()]
# Verify allocations and their stack traces (which should be empty
# because we remove the tracking function)
assert len(vallocs) == 2
assert stack(vallocs[0]) == []
assert vallocs[0].size == 70 * 1024
assert stack(vallocs[1]) == []
assert vallocs[1].size == 10 * 1024
# Verify thread IDs
main_tid = vallocs[0].tid # inner greenlet
outer_tid = vallocs[1].tid # outer greenlet
assert main_tid == outer_tid
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