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pybind11/tests/test_class_sh_trampoline_shared_from_this.py

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First fully successful attempt to make `shared_from_this` and trampolines play nicely. Now also passes the open_spiel iterated_prisoners_dilemma_test ASAN clean, in addition to all pybind11 and PyCLIF unit tests. The problem was that calling `std::shared_ptr<void>::reset()` with a `void` pointer cannot possibly update the `shared_from_this` `weak_ptr`. The solution is to store a `shd_ptr_reset` function pointer in `guarded_deleter` (similar in idea to the stored function pointer for calling `delete`). This commit still includes all debugging code, i.e. is "dirty". The code will be cleaned up after the GitHub CI is fully successful.
2021-06-20 01:13:27 +00:00
# -*- coding: utf-8 -*-
Adding `test_pass_released_shared_ptr_as_unique_ptr`, exercising new guard in smart_holder_type_casters.h.
2021-06-21 23:16:37 +00:00
import pytest
First fully successful attempt to make `shared_from_this` and trampolines play nicely. Now also passes the open_spiel iterated_prisoners_dilemma_test ASAN clean, in addition to all pybind11 and PyCLIF unit tests. The problem was that calling `std::shared_ptr<void>::reset()` with a `void` pointer cannot possibly update the `shared_from_this` `weak_ptr`. The solution is to store a `shd_ptr_reset` function pointer in `guarded_deleter` (similar in idea to the stored function pointer for calling `delete`). This commit still includes all debugging code, i.e. is "dirty". The code will be cleaned up after the GitHub CI is fully successful.
2021-06-20 01:13:27 +00:00
import pybind11_tests.class_sh_trampoline_shared_from_this as m
Adding tests involving stashing `shared_ptr`s. WIP.
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class PySft(m.Sft):
First fully successful attempt to make `shared_from_this` and trampolines play nicely. Now also passes the open_spiel iterated_prisoners_dilemma_test ASAN clean, in addition to all pybind11 and PyCLIF unit tests. The problem was that calling `std::shared_ptr<void>::reset()` with a `void` pointer cannot possibly update the `shared_from_this` `weak_ptr`. The solution is to store a `shd_ptr_reset` function pointer in `guarded_deleter` (similar in idea to the stored function pointer for calling `delete`). This commit still includes all debugging code, i.e. is "dirty". The code will be cleaned up after the GitHub CI is fully successful.
2021-06-20 01:13:27 +00:00
pass
Partial cleanup of tests. WIP. The cleanup uncovered a major problem.
2021-06-22 18:01:48 +00:00
def test_release_and_immediate_reclaim():
Adding tests involving stashing `shared_ptr`s. WIP.
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obj = PySft("PySft")
assert obj.history == "PySft"
Partial cleanup of tests. WIP. The cleanup uncovered a major problem.
2021-06-22 18:01:48 +00:00
assert obj.use_count() == 1
assert m.pass_shared_ptr(obj) == 2
Adding tests involving stashing `shared_ptr`s. WIP.
2021-06-20 15:35:51 +00:00
assert obj.history == "PySft_PassSharedPtr"
Partial cleanup of tests. WIP. The cleanup uncovered a major problem.
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assert obj.use_count() == 1
assert m.pass_shared_ptr(obj) == 2
Adding tests involving stashing `shared_ptr`s. WIP.
2021-06-20 15:35:51 +00:00
assert obj.history == "PySft_PassSharedPtr_PassSharedPtr"
Partial cleanup of tests. WIP. The cleanup uncovered a major problem.
2021-06-22 18:01:48 +00:00
assert obj.use_count() == 1
obj = PySft("")
while True:
m.pass_shared_ptr(obj)
assert obj.history == ""
assert obj.use_count() == 1
break # Comment out for manual leak checking (use `top` command).
Adding tests involving stashing `shared_ptr`s. WIP.
2021-06-20 15:35:51 +00:00
Partial cleanup of tests. WIP. The cleanup uncovered a major problem.
2021-06-22 18:01:48 +00:00
def test_release_to_cpp_stash():
Adding tests involving stashing `shared_ptr`s. WIP.
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obj = PySft("PySft")
stash1 = m.SftSharedPtrStash(1)
stash1.Add(obj)
assert obj.history == "PySft_Stash1Add"
Partial cleanup of tests. WIP. The cleanup uncovered a major problem.
2021-06-22 18:01:48 +00:00
assert obj.use_count() == 1
Leveraging new `noop_deleter_acting_as_weak_ptr_owner` to retrieve released `vptr`. The placeholder `vptr` is never exposed anymore, therefore the externally visible `use_count`s are more intuitive.
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assert stash1.history(0) == "PySft_Stash1Add"
assert stash1.use_count(0) == 1 # obj does NOT own the shared_ptr anymore.
Partial cleanup of tests. WIP. The cleanup uncovered a major problem.
2021-06-22 18:01:48 +00:00
assert m.pass_shared_ptr(obj) == 3
Adding tests involving stashing `shared_ptr`s. WIP.
2021-06-20 15:35:51 +00:00
assert obj.history == "PySft_Stash1Add_PassSharedPtr"
Partial cleanup of tests. WIP. The cleanup uncovered a major problem.
2021-06-22 18:01:48 +00:00
assert obj.use_count() == 1
Leveraging new `noop_deleter_acting_as_weak_ptr_owner` to retrieve released `vptr`. The placeholder `vptr` is never exposed anymore, therefore the externally visible `use_count`s are more intuitive.
2021-06-22 01:09:14 +00:00
assert stash1.history(0) == "PySft_Stash1Add_PassSharedPtr"
assert stash1.use_count(0) == 1
Adding tests involving stashing `shared_ptr`s. WIP.
2021-06-20 15:35:51 +00:00
stash2 = m.SftSharedPtrStash(2)
stash2.Add(obj)
assert obj.history == "PySft_Stash1Add_PassSharedPtr_Stash2Add"
Partial cleanup of tests. WIP. The cleanup uncovered a major problem.
2021-06-22 18:01:48 +00:00
assert obj.use_count() == 2
Adding tests involving stashing `shared_ptr`s. WIP.
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assert stash2.history(0) == "PySft_Stash1Add_PassSharedPtr_Stash2Add"
Leveraging new `noop_deleter_acting_as_weak_ptr_owner` to retrieve released `vptr`. The placeholder `vptr` is never exposed anymore, therefore the externally visible `use_count`s are more intuitive.
2021-06-22 01:09:14 +00:00
assert stash2.use_count(0) == 2
Adding tests involving stashing `shared_ptr`s. WIP.
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stash2.Add(obj)
Partial cleanup of tests. WIP. The cleanup uncovered a major problem.
2021-06-22 18:01:48 +00:00
exp_oh = "PySft_Stash1Add_PassSharedPtr_Stash2Add_Stash2Add"
assert obj.history == exp_oh
assert obj.use_count() == 3
assert stash1.history(0) == exp_oh
Leveraging new `noop_deleter_acting_as_weak_ptr_owner` to retrieve released `vptr`. The placeholder `vptr` is never exposed anymore, therefore the externally visible `use_count`s are more intuitive.
2021-06-22 01:09:14 +00:00
assert stash1.use_count(0) == 3
Partial cleanup of tests. WIP. The cleanup uncovered a major problem.
2021-06-22 18:01:48 +00:00
assert stash2.history(0) == exp_oh
Leveraging new `noop_deleter_acting_as_weak_ptr_owner` to retrieve released `vptr`. The placeholder `vptr` is never exposed anymore, therefore the externally visible `use_count`s are more intuitive.
2021-06-22 01:09:14 +00:00
assert stash2.use_count(0) == 3
Partial cleanup of tests. WIP. The cleanup uncovered a major problem.
2021-06-22 18:01:48 +00:00
assert stash2.history(1) == exp_oh
Leveraging new `noop_deleter_acting_as_weak_ptr_owner` to retrieve released `vptr`. The placeholder `vptr` is never exposed anymore, therefore the externally visible `use_count`s are more intuitive.
2021-06-22 01:09:14 +00:00
assert stash2.use_count(1) == 3
Adding tests involving stashing `shared_ptr`s. WIP.
2021-06-20 15:35:51 +00:00
del obj
Partial cleanup of tests. WIP. The cleanup uncovered a major problem.
2021-06-22 18:01:48 +00:00
assert stash2.history(0) == exp_oh
Leveraging new `noop_deleter_acting_as_weak_ptr_owner` to retrieve released `vptr`. The placeholder `vptr` is never exposed anymore, therefore the externally visible `use_count`s are more intuitive.
2021-06-22 01:09:14 +00:00
assert stash2.use_count(0) == 3
Partial cleanup of tests. WIP. The cleanup uncovered a major problem.
2021-06-22 18:01:48 +00:00
assert stash2.history(1) == exp_oh
Leveraging new `noop_deleter_acting_as_weak_ptr_owner` to retrieve released `vptr`. The placeholder `vptr` is never exposed anymore, therefore the externally visible `use_count`s are more intuitive.
2021-06-22 01:09:14 +00:00
assert stash2.use_count(1) == 3
Adding tests involving stashing `shared_ptr`s. WIP.
2021-06-20 15:35:51 +00:00
del stash2
Partial cleanup of tests. WIP. The cleanup uncovered a major problem.
2021-06-22 18:01:48 +00:00
assert stash1.history(0) == exp_oh
assert stash1.use_count(0) == 1
Adding tests involving stashing `shared_ptr`s. WIP.
2021-06-20 15:35:51 +00:00
Partial cleanup of tests. WIP. The cleanup uncovered a major problem.
2021-06-22 18:01:48 +00:00
def test_release_to_cpp_stash_leak():
obj = PySft("")
while True:
stash1 = m.SftSharedPtrStash(1)
stash1.Add(obj)
assert obj.history == ""
assert obj.use_count() == 1
assert stash1.use_count(0) == 1
stash1.Add(obj)
assert obj.history == ""
assert obj.use_count() == 2
assert stash1.use_count(0) == 2
assert stash1.use_count(1) == 2
break # Comment out for manual leak checking (use `top` command).
def test_release_to_cpp_stash_via_shared_from_this():
Adding tests involving stashing `shared_ptr`s. WIP.
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obj = PySft("PySft")
stash1 = m.SftSharedPtrStash(1)
stash1.AddSharedFromThis(obj)
assert obj.history == "PySft_Stash1AddSharedFromThis"
assert stash1.use_count(0) == 2
stash1.AddSharedFromThis(obj)
assert obj.history == "PySft_Stash1AddSharedFromThis_Stash1AddSharedFromThis"
assert stash1.use_count(0) == 3
assert stash1.use_count(1) == 3
Partial cleanup of tests. WIP. The cleanup uncovered a major problem.
2021-06-22 18:01:48 +00:00
def test_release_to_cpp_stash_via_shared_from_this_leak_1(): # WIP
m.to_cout("")
m.to_cout("")
m.to_cout("Add first")
obj = PySft("")
import weakref
obj_wr = weakref.ref(obj)
while True:
stash1 = m.SftSharedPtrStash(1)
stash1.Add(obj)
assert obj.history == ""
assert obj.use_count() == 1
assert stash1.use_count(0) == 1
stash1.AddSharedFromThis(obj)
assert obj.history == ""
assert obj.use_count() == 2
assert stash1.use_count(0) == 2
assert stash1.use_count(1) == 2
del obj
assert obj_wr() is not None
assert stash1.use_count(0) == 2
assert stash1.use_count(1) == 2
break # Comment out for manual leak checking (use `top` command).
def test_release_to_cpp_stash_via_shared_from_this_leak_2(): # WIP
m.to_cout("")
m.to_cout("AddSharedFromThis only")
obj = PySft("")
import weakref
obj_wr = weakref.ref(obj)
while True:
stash1 = m.SftSharedPtrStash(1)
stash1.AddSharedFromThis(obj)
assert obj.history == ""
assert obj.use_count() == 2
assert stash1.use_count(0) == 2
stash1.AddSharedFromThis(obj)
assert obj.history == ""
assert obj.use_count() == 3
assert stash1.use_count(0) == 3
assert stash1.use_count(1) == 3
del obj
assert obj_wr() is None # BAD NEEDS FIXING
assert stash1.use_count(0) == 2
assert stash1.use_count(1) == 2
break # Comment out for manual leak checking (use `top` command).
Adding `test_pass_released_shared_ptr_as_unique_ptr`, exercising new guard in smart_holder_type_casters.h.
2021-06-21 23:16:37 +00:00
def test_pass_released_shared_ptr_as_unique_ptr():
obj = PySft("PySft")
stash1 = m.SftSharedPtrStash(1)
stash1.Add(obj) # Releases shared_ptr to C++.
with pytest.raises(ValueError) as exc_info:
m.pass_unique_ptr(obj)
assert str(exc_info.value) == (
"Python instance is currently owned by a std::shared_ptr."
)
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