mirror of
https://github.com/apache/nuttx.git
synced 2026-05-22 05:42:05 +08:00
Add low-level memory management hooks that will be needed to support brk() and sbrk()
This commit is contained in:
Gregory Nutt
@@ -337,6 +337,39 @@ FAR void *mm_zalloc(FAR struct mm_heap_s *heap, size_t size);
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FAR void *mm_memalign(FAR struct mm_heap_s *heap, size_t alignment,
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size_t size);
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/* Functions contained in mm_brkaddr.c **************************************/
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FAR void *mm_brkaddr(FAR struct mm_heap_s *heap, int region);
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/* Functions contained in umm_brkaddr.c *************************************/
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#ifdef CONFIG_MM_USER_HEAP
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FAR void *umm_brkaddr(int region);
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#endif
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/* Functions contained in kmm_brkaddr.c *************************************/
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#ifdef CONFIG_MM_KERNEL_HEAP
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FAR void *umm_brkaddr(int region);
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#endif
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/* Functions contained in mm_extend.c ***************************************/
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void mm_extend(FAR struct mm_heap_s *heap, FAR void *mem, size_t size,
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int region);
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/* Functions contained in umm_extend.c **************************************/
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#ifdef CONFIG_MM_USER_HEAP
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void umm_extend(FAR void *mem, size_t size, int region);
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#endif
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/* Functions contained in kmm_extend.c **************************************/
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#ifdef CONFIG_MM_KERNEL_HEAP
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void kmm_extend(FAR void *mem, size_t size, int region);
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#endif
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/* Functions contained in mm_mallinfo.c *************************************/
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struct mallinfo; /* Forward reference */
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+6
-6
@@ -53,21 +53,21 @@ endif
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ASRCS =
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CSRCS = mm_initialize.c mm_sem.c mm_addfreechunk.c mm_size2ndx.c
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CSRCS += mm_shrinkchunk.c
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CSRCS += mm_calloc.c mm_free.c mm_mallinfo.c mm_malloc.c mm_memalign.c
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CSRCS += mm_realloc.c mm_zalloc.c
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CSRCS += mm_brkaddr.c mm_calloc.c mm_extend.c mm_free.c mm_mallinfo.c
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CSRCS += mm_malloc.c mm_memalign.c mm_realloc.c mm_zalloc.c
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# User allocator
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CSRCS += umm_initialize.c umm_addregion.c umm_sem.c
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CSRCS += umm_calloc.c umm_free.c umm_mallinfo.c umm_malloc.c
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CSRCS += umm_memalign.c umm_realloc.c umm_zalloc.c
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CSRCS += umm_brkaddr.c umm_calloc.c umm_extend.c umm_free.c umm_mallinfo.c
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CSRCS += umm_malloc.c umm_memalign.c umm_realloc.c umm_zalloc.c
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# Kernel allocator
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ifeq ($(CONFIG_MM_KERNEL_HEAP),y)
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CSRCS += kmm_initialize.c kmm_addregion.c kmm_sem.c
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CSRCS += kmm_calloc.c kmm_free.c kmm_mallinfo.c kmm_malloc.c
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CSRCS += kmm_memalign.c kmm_realloc.c kmm_zalloc.c
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CSRCS += kmm_brkaddr.c kmm_calloc.c kmm_extend.c kmm_free.c kmm_mallinfo.c
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CSRCS += kmm_malloc.c kmm_memalign.c kmm_realloc.c kmm_zalloc.c
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ifeq ($(CONFIG_DEBUG),y)
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CSRCS += kmm_heapmember.c
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endif
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@@ -0,0 +1,69 @@
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/****************************************************************************
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* mm/kmm_breakaddr.c
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*
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* Copyright (C) 2014 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
|
||||
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
|
||||
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
|
||||
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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||||
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
|
||||
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
|
||||
* 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 <assert.h>
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#include <nuttx/mm.h>
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#ifdef CONFIG_MM_KERNEL_HEAP
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: kmm_brkaddr
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*
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* Description:
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* Return the break address of a region in the user heap
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*
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****************************************************************************/
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FAR void *kmm_brkaddr(int region)
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{
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return mm_brkaddr(&g_kmmheap, region);
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}
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#endif /* CONFIG_MM_KERNEL_HEAP */
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@@ -0,0 +1,68 @@
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/****************************************************************************
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* mm/kmm_extend.c
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*
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* Copyright (C) 2014 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
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
* 2. Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in
|
||||
* the documentation and/or other materials provided with the
|
||||
* distribution.
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||||
* 3. Neither the name NuttX nor the names of its contributors may be
|
||||
* used to endorse or promote products derived from this software
|
||||
* without specific prior written permission.
|
||||
*
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||||
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
||||
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
||||
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
|
||||
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
|
||||
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
|
||||
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
|
||||
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
|
||||
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
|
||||
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||||
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
|
||||
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
||||
* 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 <nuttx/mm.h>
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#ifdef CONFIG_MM_KERNEL_HEAP
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: kmm_extend
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*
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* Description:
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* Extend a region in the kernel heap by add a block of (virtually)
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* contiguous memory to the end of the heap.
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*
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****************************************************************************/
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void kmm_extend(FAR void *mem, size_t size, int region)
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{
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mm_extend(&g_kmmheap, mem, size, region);
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}
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#endif /* CONFIG_MM_KERNEL_HEAP */
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@@ -0,0 +1,69 @@
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/****************************************************************************
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* mm/mm_brkaddr.c
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*
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* Copyright (C) 2014 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
|
||||
* are met:
|
||||
*
|
||||
* 1. Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
* 2. Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in
|
||||
* the documentation and/or other materials provided with the
|
||||
* distribution.
|
||||
* 3. Neither the name NuttX nor the names of its contributors may be
|
||||
* used to endorse or promote products derived from this software
|
||||
* without specific prior written permission.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
||||
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
||||
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
|
||||
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
|
||||
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
|
||||
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
|
||||
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
|
||||
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
|
||||
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||||
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
|
||||
* 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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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <assert.h>
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#include <nuttx/mm.h>
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: mm_brkaddr
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*
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* Description:
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* Return the break address of a heap region
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*
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****************************************************************************/
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FAR void *mm_brkaddr(FAR struct mm_heap_s *heap, int region)
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{
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uintptr_t brkaddr;
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DEBUGASSERT(heap && region < heap->mm_nregions);
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brkaddr = (uintptr_t)heap->mm_heapend[region];
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return (FAR void *)(brkaddr + SIZEOF_MM_ALLOCNODE);
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}
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+123
@@ -0,0 +1,123 @@
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/****************************************************************************
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* mm/mm_extend.c
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*
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* Copyright (C) 2014 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
|
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*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions
|
||||
* are met:
|
||||
*
|
||||
* 1. Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
* 2. Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in
|
||||
* the documentation and/or other materials provided with the
|
||||
* distribution.
|
||||
* 3. Neither the name NuttX nor the names of its contributors may be
|
||||
* used to endorse or promote products derived from this software
|
||||
* without specific prior written permission.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
||||
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
||||
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
|
||||
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
|
||||
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
|
||||
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
|
||||
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
|
||||
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
|
||||
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||||
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
|
||||
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
||||
* POSSIBILITY OF SUCH DAMAGE.
|
||||
*
|
||||
****************************************************************************/
|
||||
|
||||
/****************************************************************************
|
||||
* Included Files
|
||||
****************************************************************************/
|
||||
|
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#include <nuttx/config.h>
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#include <assert.h>
|
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#include <nuttx/mm.h>
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/****************************************************************************
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* Pre-processor Definitions
|
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****************************************************************************/
|
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#define MIN_EXTEND (2 * SIZEOF_MM_ALLOCNODE)
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/****************************************************************************
|
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* Public Functions
|
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****************************************************************************/
|
||||
|
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/****************************************************************************
|
||||
* Name: mm_extend
|
||||
*
|
||||
* Description:
|
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* Extend a heap region by add a block of (virtually) contiguous memory
|
||||
* to the end of the heap.
|
||||
*
|
||||
****************************************************************************/
|
||||
|
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void mm_extend(FAR struct mm_heap_s *heap, FAR void *mem, size_t size,
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int region)
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{
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struct mm_allocnode_s *oldnode;
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struct mm_allocnode_s *newnode;
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uintptr_t blockstart;
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uintptr_t blockend;
|
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|
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/* Make sure that we were passed valid parameters */
|
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DEBUGASSERT(heap && mem);
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DEBUGASSERT(size >= MIN_EXTEND && (unsigned)region < heap->mm_nregions);
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/* Make sure that the memory region are properly aligned */
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blockstart = (uintptr_t)mem;
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blockend = blockstart + size;
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|
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DEBUGASSERT(MM_ALIGN_UP(blockstart) == blockstart);
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DEBUGASSERT(MM_ALIGN_DOWN(blockend) == blockend);
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|
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/* Take the memory manager semaphore */
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mm_takesemaphore(heap);
|
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|
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/* Get the terminal node in the old heap. The block to extend must
|
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* immediately follow this node.
|
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*/
|
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|
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oldnode = heap->mm_heapend[region];
|
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DEBUGASSERT((uintptr_t)oldnode + SIZEOF_MM_ALLOCNODE == (uintptr_t)mem);
|
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|
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/* The size of the old node now extends to the new terminal node.
|
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* This is the old size (SIZEOF_MM_ALLOCNODE) plus the size of
|
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* the block (size) minus the size of the new terminal node
|
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* (SIZEOF_MM_ALLOCNODE) or simply:
|
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*/
|
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|
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oldnode->size = size;
|
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|
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/* The old node should already be marked as allocated */
|
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|
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DEBUGASSERT((oldnode->preceding & MM_ALLOC_BIT) != 0);
|
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|
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/* Get and initialize the new terminal node in the heap */
|
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|
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newnode = (FAR struct mm_allocnode_s *)(blockend - SIZEOF_MM_ALLOCNODE);
|
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newnode->size = SIZEOF_MM_ALLOCNODE;
|
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newnode->preceding = oldnode->size | MM_ALLOC_BIT;
|
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|
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heap->mm_heapend[region] = newnode;
|
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mm_givesemaphore(heap);
|
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|
||||
/* Finally "free" the new block of memory where the old terminal node was
|
||||
* located.
|
||||
*/
|
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|
||||
mm_free(heap, (FAR void *)mem);
|
||||
}
|
||||
@@ -0,0 +1,69 @@
|
||||
/****************************************************************************
|
||||
* mm/umm_breakaddr.c
|
||||
*
|
||||
* Copyright (C) 2014 Gregory Nutt. All rights reserved.
|
||||
* Author: Gregory Nutt <gnutt@nuttx.org>
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions
|
||||
* are met:
|
||||
*
|
||||
* 1. Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
* 2. Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in
|
||||
* the documentation and/or other materials provided with the
|
||||
* distribution.
|
||||
* 3. Neither the name NuttX nor the names of its contributors may be
|
||||
* used to endorse or promote products derived from this software
|
||||
* without specific prior written permission.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
||||
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
||||
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
|
||||
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
|
||||
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
|
||||
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
|
||||
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
|
||||
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
|
||||
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||||
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
|
||||
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
||||
* POSSIBILITY OF SUCH DAMAGE.
|
||||
*
|
||||
****************************************************************************/
|
||||
|
||||
/****************************************************************************
|
||||
* Included Files
|
||||
****************************************************************************/
|
||||
|
||||
#include <nuttx/config.h>
|
||||
|
||||
#include <assert.h>
|
||||
|
||||
#include <nuttx/mm.h>
|
||||
|
||||
#ifdef CONFIG_MM_USER_HEAP
|
||||
|
||||
/****************************************************************************
|
||||
* Pre-processor Definitions
|
||||
****************************************************************************/
|
||||
|
||||
/****************************************************************************
|
||||
* Public Functions
|
||||
****************************************************************************/
|
||||
|
||||
/****************************************************************************
|
||||
* Name: umm_brkaddr
|
||||
*
|
||||
* Description:
|
||||
* Return the break address of a region in the user heap
|
||||
*
|
||||
****************************************************************************/
|
||||
|
||||
FAR void *umm_brkaddr(int region)
|
||||
{
|
||||
return mm_brkaddr(&g_mmheap, region);
|
||||
}
|
||||
|
||||
#endif /* CONFIG_MM_USER_HEAP */
|
||||
@@ -0,0 +1,68 @@
|
||||
/****************************************************************************
|
||||
* mm/umm_extend.c
|
||||
*
|
||||
* Copyright (C) 2014 Gregory Nutt. All rights reserved.
|
||||
* Author: Gregory Nutt <gnutt@nuttx.org>
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions
|
||||
* are met:
|
||||
*
|
||||
* 1. Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
* 2. Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in
|
||||
* the documentation and/or other materials provided with the
|
||||
* distribution.
|
||||
* 3. Neither the name NuttX nor the names of its contributors may be
|
||||
* used to endorse or promote products derived from this software
|
||||
* without specific prior written permission.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
||||
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
||||
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
|
||||
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
|
||||
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
|
||||
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
|
||||
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
|
||||
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
|
||||
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||||
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
|
||||
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
||||
* POSSIBILITY OF SUCH DAMAGE.
|
||||
*
|
||||
****************************************************************************/
|
||||
|
||||
/****************************************************************************
|
||||
* Included Files
|
||||
****************************************************************************/
|
||||
|
||||
#include <nuttx/config.h>
|
||||
|
||||
#include <nuttx/mm.h>
|
||||
|
||||
#ifdef CONFIG_MM_USER_HEAP
|
||||
|
||||
/****************************************************************************
|
||||
* Pre-processor Definitions
|
||||
****************************************************************************/
|
||||
|
||||
/****************************************************************************
|
||||
* Public Functions
|
||||
****************************************************************************/
|
||||
|
||||
/****************************************************************************
|
||||
* Name: umm_extend
|
||||
*
|
||||
* Description:
|
||||
* Extend a region in the user heap by add a block of (virtually)
|
||||
* contiguous memory to the end of the heap.
|
||||
*
|
||||
****************************************************************************/
|
||||
|
||||
void umm_extend(FAR void *mem, size_t size, int region)
|
||||
{
|
||||
mm_extend(&g_mmheap, mem, size, region);
|
||||
}
|
||||
|
||||
#endif /* CONFIG_MM_USER_HEAP */
|
||||
Reference in New Issue
Block a user