50578dc501
- User mode allocator was used for setting up the environment. This works in flat mode and probably in protected mode as well, as there is always a a single user allocator present - This does not work in kernel mode, where each user task has its own heap allocator. Also, when the idle tasks environment is being set, no allocator is ready and the system crashes at once. Fix this by using the group allocators instead: - Idle task is a kernel task, so its group is privileged - Add group_realloc - Use the group_malloc/realloc functions instead of kumm_malloc
84 lines
2.6 KiB
C
84 lines
2.6 KiB
C
/****************************************************************************
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* sched/environ/env_release.c
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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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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#ifndef CONFIG_DISABLE_ENVIRON
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#include <sched.h>
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#include <assert.h>
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#include <errno.h>
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#include <nuttx/kmalloc.h>
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#include "environ/environ.h"
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: env_release
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*
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* Description:
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* env_release() is called only from group_leave() when the last member of
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* a task group exits. The env_release() function clears the environment
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* of all name-value pairs and sets the value of the external variable
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* environ to NULL.
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*
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* Input Parameters:
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* group - Identifies the task group containing the environment structure
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* to be released.
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*
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* Returned Value:
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* None
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*
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* Assumptions:
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* Not called from an interrupt handler
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*
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****************************************************************************/
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void env_release(FAR struct task_group_s *group)
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{
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DEBUGASSERT(group != NULL);
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/* Free any allocate environment strings */
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if (group->tg_envp)
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{
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/* Free the environment */
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group_free(group, group->tg_envp);
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}
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/* In any event, make sure that all environment-related variables in the
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* task group structure are reset to initial values.
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*/
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group->tg_envsize = 0;
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group->tg_envp = NULL;
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}
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#endif /* CONFIG_DISABLE_ENVIRON */
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