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lib: posix: dynamic stack support for pthread_create #44727

Merged
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

Commits on Jul 21, 2023

  1. kernel: dynamic: remove unnecessary size assignment 

    Previously, the kernel stack size was adjusted for no apparent
reason.

Signed-off-by: Christopher Friedt <[email protected]>
    @cfriedt
    cfriedt committed Jul 21, 2023
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  2. kernel: dynamic: declare dynamic stubs when disabled 

    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
    cfriedt committed Jul 21, 2023
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  3. pthread: facilitate dynamically allocated thread stacks 

    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
    cfriedt committed Jul 21, 2023
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  4. pthread: test: facilitate dynamically allocated thread stacks 

    Tests for dynamically allocated POSIX thread stacks.

Signed-off-by: Christopher Friedt <[email protected]>
    @cfriedt
    cfriedt committed Jul 21, 2023
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