651f5e2622
sched/group: Fix a deadlock when loading an ELF Signed-off-by: Masayuki Ishikawa <Masayuki.Ishikawa@jp.sony.com> Approved-by: GregoryN <gnutt@nuttx.org>
110 lines
3.8 KiB
C
110 lines
3.8 KiB
C
/****************************************************************************
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* sched/group/group_exitinfo.c
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*
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* Copyright (C) 2018 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <sys/types.h>
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#include <errno.h>
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#include <nuttx/sched.h>
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#include <nuttx/irq.h>
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#include <nuttx/binfmt/binfmt.h>
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#include "sched/sched.h"
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#include "group/group.h"
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#ifdef CONFIG_BINFMT_LOADABLE
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: group_exitinfo
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*
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* Description:
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* This function may be called to when a task is loaded into memory. It
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* will setup the to automatically unload the module when the task exits.
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*
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* Input Parameters:
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* pid - The task ID of the newly loaded task
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* bininfo - This structure allocated with kmm_malloc(). This memory
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* persists until the task exits and will be used unloads
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* the module from memory.
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*
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* Returned Value:
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* This is a NuttX internal function so it follows the convention that
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* 0 (OK) is returned on success and a negated errno is returned on
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* failure.
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*
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****************************************************************************/
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int group_exitinfo(pid_t pid, FAR struct binary_s *bininfo)
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{
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FAR struct tcb_s *tcb;
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FAR struct task_group_s *group;
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irqstate_t flags;
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DEBUGASSERT(bininfo != NULL);
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flags = spin_lock_irqsave();
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/* Get the TCB associated with the PID */
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tcb = sched_gettcb(pid);
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if (tcb == NULL)
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{
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spin_unlock_irqrestore(flags);
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return -ESRCH;
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}
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/* Get the group that this task belongs to */
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group = tcb->group;
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DEBUGASSERT(group != NULL && group->tg_bininfo == NULL);
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/* Save the binary info for use when the task exits */
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group->tg_bininfo = bininfo;
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spin_unlock_irqrestore(flags);
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return OK;
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}
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#endif /* CONFIG_BINFMT_LOADABLE */
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