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lib: posix: dynamic stack support for pthread_create #44727

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merged 4 commits into from
Jul 24, 2023
Merged

lib: posix: dynamic stack support for pthread_create #44727

merged 4 commits into from
Jul 24, 2023

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@cfriedt cfriedt commented Apr 11, 2022 •
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Support automatic thread stack allocation for pthread_create(), which is required as part of IEEE Std. 1003.2017 (and all earlier versions).

For more info, see
https://pubs.opengroup.org/onlinepubs/9699919799/functions/pthread_create.html

Fixes #25973

(Note: This depends on #44379 and #59773)

@github-actions github-actions bot added area: API Changes to public APIs area: Kernel area: POSIX POSIX API Library area: Tests Issues related to a particular existing or missing test labels Apr 11, 2022
@cfriedt cfriedt force-pushed the issue/25973/lib-posix-dynamic-stack-support-for-pthread-create branch from e952741 to d288c14 Compare April 11, 2022 02:45
@cfriedt cfriedt mentioned this pull request Apr 11, 2022
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@cfriedt cfriedt force-pushed the issue/25973/lib-posix-dynamic-stack-support-for-pthread-create branch from d288c14 to 78d154c Compare July 14, 2023 01:16
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@cfriedt cfriedt force-pushed the issue/25973/lib-posix-dynamic-stack-support-for-pthread-create branch from 52503b3 to e7daa08 Compare July 19, 2023 12:01
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cfriedt commented Jul 19, 2023

  • fixed merge conflict in tests/posix/common/testcase.yaml

@cfriedt cfriedt force-pushed the issue/25973/lib-posix-dynamic-stack-support-for-pthread-create branch 2 times, most recently from cfa7228 to 60b5cbf Compare July 20, 2023 19:01
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cfriedt commented Jul 20, 2023

  • added Kconfig option CONFIG_PTHREAD_RECYCLER_DELAY_MS
  • fixed merge conflict with tests/posix/common/src/pthread.c

@cfriedt cfriedt force-pushed the issue/25973/lib-posix-dynamic-stack-support-for-pthread-create branch from 60b5cbf to b0fefbf Compare July 20, 2023 20:25
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cfriedt commented Jul 20, 2023

  • Bitten by VS Code spaces vs tabs - fixed!

keith-packard
keith-packard previously approved these changes Jul 20, 2023
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Looks ready to me.

ceolin
ceolin reviewed Jul 21, 2023
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ceolin
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ceolin commented Jul 21, 2023

minor comments, it is looking pretty good !

@cfriedt cfriedt force-pushed the issue/25973/lib-posix-dynamic-stack-support-for-pthread-create branch from b0fefbf to 4340ab4 Compare July 21, 2023 21:02
cfriedt and others added 4 commits July 21, 2023 18:02
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kernel: dynamic: remove unnecessary size assignment
43ffae2 
Previously, the kernel stack size was adjusted for no apparent
reason.

Signed-off-by: Christopher Friedt <[email protected]>
@cfriedt
kernel: dynamic: declare dynamic stubs when disabled
e5e7992 
With some of the recent work to disable unnecessary system
calls, there is a scenario where `z_impl_k_thread_stack_free()`
is not defined and an undefined symbol error occurs.

Safety was very concerned that dynamic thread stack code might
touch other code that does not malloc, so add a separate file
for the stack alloc and free stubs.

Signed-off-by: Christopher Friedt <[email protected]>
@cfriedt
pthread: facilitate dynamically allocated thread stacks
d0da8c3 
This change allows users to call pthread_create() with
the pthread_attr_t argument equal to NULL.

If Zephyr is configured with `CONFIG_DYNAMIC_THREAD`, then a
suitable thread stack will be allocated via
k_thread_stack_alloc(). The allocated thread stack is
automatically freed via k_thread_stack_free().

This makes the Zephyr implementation of pthread_create()
compliant with the normative spec.

Signed-off-by: Christopher Friedt <[email protected]>
@cfriedt
pthread: test: facilitate dynamically allocated thread stacks
4a69113 
Tests for dynamically allocated POSIX thread stacks.

Signed-off-by: Christopher Friedt <[email protected]>
@cfriedt cfriedt force-pushed the issue/25973/lib-posix-dynamic-stack-support-for-pthread-create branch from 4340ab4 to 4a69113 Compare July 21, 2023 22:07
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cfriedt commented Jul 21, 2023

  • rebased

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cfriedt commented Jul 22, 2023

Unrelated errors are unrelated. Need to wait until a hotfix or 2 rolls in

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cfriedt commented Jul 22, 2023

@keith-packard @ceolin - look ok?

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Looks ready; had a question about whether you want to require any attribute use to include a stack as that doesn't seem entirely compatible with POSIX? Happy to let that come in a later PR.

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cfriedt commented Jul 22, 2023

Looks ready; had a question about whether you want to require any attribute use to include a stack as that doesn't seem entirely compatible with POSIX? Happy to let that come in a later PR.

There are other use cases - another PR would be good and a kconfig of course.

@cfriedt cfriedt requested a review from ceolin July 23, 2023 17:58
@cfriedt cfriedt merged commit 5a28297 into zephyrproject-rtos:main Jul 24, 2023
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@cfriedt cfriedt deleted the issue/25973/lib-posix-dynamic-stack-support-for-pthread-create branch November 14, 2023 22:32
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@keith-packard keith-packard keith-packard approved these changes

@ceolin ceolin ceolin approved these changes

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@nashif nashif Awaiting requested review from nashif

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lib: posix: dynamic stack support for pthread_create()
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