74 lines
2.0 KiB
C
74 lines
2.0 KiB
C
/*
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* Copyright (c) 2016 Wind River Systems, Inc.
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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/**
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* @file
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* @brief Primitive for aborting a thread when an arch-specific one is not
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* needed..
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*/
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#include <kernel.h>
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#include <kernel_structs.h>
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#include <kernel_internal.h>
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#include <kswap.h>
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#include <string.h>
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#include <toolchain.h>
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#include <linker/sections.h>
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#include <wait_q.h>
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#include <ksched.h>
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#include <sys/__assert.h>
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#include <syscall_handler.h>
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extern void z_thread_single_abort(struct k_thread *thread);
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#if !defined(CONFIG_ARCH_HAS_THREAD_ABORT)
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void z_impl_k_thread_abort(k_tid_t thread)
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{
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/* We aren't trying to synchronize data access here (these
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* APIs are internally synchronized). The original lock seems
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* to have been in place to prevent the thread from waking up
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* due to a delivered interrupt. Leave a dummy spinlock in
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* place to do that. This API should be revisted though, it
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* doesn't look SMP-safe as it stands.
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*/
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struct k_spinlock lock = {};
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k_spinlock_key_t key = k_spin_lock(&lock);
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__ASSERT((thread->base.user_options & K_ESSENTIAL) == 0U,
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"essential thread aborted");
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z_thread_single_abort(thread);
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z_thread_monitor_exit(thread);
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if (thread == _current && !z_is_in_isr()) {
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z_swap(&lock, key);
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} else {
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/* Really, there's no good reason for this to be a
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* scheduling point if we aren't aborting _current (by
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* definition, no higher priority thread is runnable,
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* because we're running!). But it always has been
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* and is thus part of our API, and we have tests that
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* rely on k_thread_abort() scheduling out of
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* cooperative threads.
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*/
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z_reschedule(&lock, key);
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}
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}
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#endif
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#ifdef CONFIG_USERSPACE
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Z_SYSCALL_HANDLER(k_thread_abort, thread_p)
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{
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struct k_thread *thread = (struct k_thread *)thread_p;
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Z_OOPS(Z_SYSCALL_OBJ(thread, K_OBJ_THREAD));
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Z_OOPS(Z_SYSCALL_VERIFY_MSG(!(thread->base.user_options & K_ESSENTIAL),
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"aborting essential thread %p", thread));
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z_impl_k_thread_abort((struct k_thread *)thread);
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return 0;
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}
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#endif
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