[PATCH] Entangle the C Program Heap initialization
Gedare Bloom
gedare at rtems.org
Thu Oct 1 15:07:37 UTC 2020
This looks ok to me. I suppose eliminating the dependency requires the
function pointer indirection. The only thing I don't see is why
redefinition of the _Workspace_Malloc_initializer is allowed in both
wkspacemallocinitdefault.c and in confdefs/wkspace.h. I would think
that will cause an error for multiple definitions.
On Wed, Sep 30, 2020 at 5:03 AM Sebastian Huber
<sebastian.huber at embedded-brains.de> wrote:
>
> Before this patch RTEMS_Malloc_Initialize() had a fixed dependency on
> _Workspace_Area. Introduce _Workspace_Malloc_initializer to have this
> dependency only if CONFIGURE_UNIFIED_WORK_AREAS is defined by the
> application configuration.
> ---
> cpukit/Makefile.am | 3 +
> cpukit/include/rtems/confdefs/wkspace.h | 3 +
> cpukit/include/rtems/malloc.h | 2 +-
> cpukit/include/rtems/score/wkspacedata.h | 26 +++++++
> cpukit/libcsupport/src/malloc_initialize.c | 78 +++++++++------------
> cpukit/libcsupport/src/mallocheap.c | 56 +++++++++++++++
> cpukit/score/src/wkspacemallocinitdefault.c | 44 ++++++++++++
> cpukit/score/src/wkspacemallocinitunified.c | 47 +++++++++++++
> spec/build/cpukit/librtemscpu.yml | 3 +
> 9 files changed, 217 insertions(+), 45 deletions(-)
> create mode 100644 cpukit/libcsupport/src/mallocheap.c
> create mode 100644 cpukit/score/src/wkspacemallocinitdefault.c
> create mode 100644 cpukit/score/src/wkspacemallocinitunified.c
>
> diff --git a/cpukit/Makefile.am b/cpukit/Makefile.am
> index 2c35354e66..1f9124e175 100644
> --- a/cpukit/Makefile.am
> +++ b/cpukit/Makefile.am
> @@ -176,6 +176,7 @@ librtemscpu_a_SOURCES += libcsupport/src/mallocdirtydefault.c
> librtemscpu_a_SOURCES += libcsupport/src/mallocextenddefault.c
> librtemscpu_a_SOURCES += libcsupport/src/mallocfreespace.c
> librtemscpu_a_SOURCES += libcsupport/src/mallocgetheapptr.c
> +librtemscpu_a_SOURCES += libcsupport/src/mallocheap.c
> librtemscpu_a_SOURCES += libcsupport/src/mallocinfo.c
> librtemscpu_a_SOURCES += libcsupport/src/malloc_initialize.c
> librtemscpu_a_SOURCES += libcsupport/src/_malloc_r.c
> @@ -1025,6 +1026,8 @@ librtemscpu_a_SOURCES += score/src/interr.c
> librtemscpu_a_SOURCES += score/src/isr.c
> librtemscpu_a_SOURCES += score/src/wkspace.c
> librtemscpu_a_SOURCES += score/src/wkspaceisunifieddefault.c
> +librtemscpu_a_SOURCES += score/src/wkspacemallocinitdefault.c
> +librtemscpu_a_SOURCES += score/src/wkspacemallocinitunified.c
> librtemscpu_a_SOURCES += score/src/wkstringduplicate.c
> librtemscpu_a_SOURCES += score/src/iobase64.c
> librtemscpu_a_SOURCES += score/src/ioprintf.c
> diff --git a/cpukit/include/rtems/confdefs/wkspace.h b/cpukit/include/rtems/confdefs/wkspace.h
> index 89d7c21b2a..d40194cbec 100644
> --- a/cpukit/include/rtems/confdefs/wkspace.h
> +++ b/cpukit/include/rtems/confdefs/wkspace.h
> @@ -126,6 +126,9 @@ const uintptr_t _Workspace_Size = CONFIGURE_EXECUTIVE_RAM_SIZE;
>
> #ifdef CONFIGURE_UNIFIED_WORK_AREAS
> const bool _Workspace_Is_unified = true;
> +
> + struct Heap_Control *( * const _Workspace_Malloc_initializer )( void ) =
> + _Workspace_Malloc_initialize_unified;
> #endif
>
> uint32_t rtems_minimum_stack_size = CONFIGURE_MINIMUM_TASK_STACK_SIZE;
> diff --git a/cpukit/include/rtems/malloc.h b/cpukit/include/rtems/malloc.h
> index 34bdbcb91e..13e94ac38a 100644
> --- a/cpukit/include/rtems/malloc.h
> +++ b/cpukit/include/rtems/malloc.h
> @@ -43,7 +43,7 @@ extern "C" {
> */
> extern Heap_Control *RTEMS_Malloc_Heap;
>
> -void RTEMS_Malloc_Initialize(
> +Heap_Control *RTEMS_Malloc_Initialize(
> const Memory_Information *mem,
> Heap_Initialization_or_extend_handler extend
> );
> diff --git a/cpukit/include/rtems/score/wkspacedata.h b/cpukit/include/rtems/score/wkspacedata.h
> index 613a320dfe..fd6fd1c1cb 100644
> --- a/cpukit/include/rtems/score/wkspacedata.h
> +++ b/cpukit/include/rtems/score/wkspacedata.h
> @@ -43,6 +43,8 @@
> extern "C" {
> #endif
>
> +struct Heap_Control;
> +
> /**
> * @addtogroup RTEMSScoreWorkspace
> *
> @@ -65,6 +67,30 @@ extern const uintptr_t _Workspace_Size;
> */
> extern const bool _Workspace_Is_unified;
>
> +/**
> + * @brief Initializes the C Program Heap separated from the RTEMS Workspace.
> + *
> + * @return Returns the heap control used for the C Program Heap.
> + */
> +struct Heap_Control *_Workspace_Malloc_initialize_separate( void );
> +
> +/**
> + * @brief Initializes the C Program Heap so that it is unified with the RTEMS
> + * Workspace.
> + *
> + * @return Returns the heap control used for the C Program Heap.
> + */
> +struct Heap_Control *_Workspace_Malloc_initialize_unified( void );
> +
> +/**
> + * @brief This constant provides the C Program Heap initialization handler.
> + *
> + * This constant is defined by the application configuration option
> + * #CONFIGURE_UNIFIED_WORK_AREAS via <rtems/confdefs.h> or a default
> + * configuration.
> + */
> +extern struct Heap_Control *( * const _Workspace_Malloc_initializer )( void );
> +
> /** @} */
>
> #ifdef __cplusplus
> diff --git a/cpukit/libcsupport/src/malloc_initialize.c b/cpukit/libcsupport/src/malloc_initialize.c
> index 0203e22411..fb0999df01 100644
> --- a/cpukit/libcsupport/src/malloc_initialize.c
> +++ b/cpukit/libcsupport/src/malloc_initialize.c
> @@ -19,73 +19,63 @@
>
> #include <rtems/malloc.h>
> #include <rtems/score/wkspace.h>
> -#include <rtems/sysinit.h>
>
> #include "malloc_p.h"
>
> -Heap_Control *RTEMS_Malloc_Heap;
> -
> -static void _Malloc_Initialize( void )
> -{
> - RTEMS_Malloc_Initialize( _Memory_Get(), _Heap_Extend );
> -}
> -
> -RTEMS_SYSINIT_ITEM(
> - _Malloc_Initialize,
> - RTEMS_SYSINIT_MALLOC,
> - RTEMS_SYSINIT_ORDER_MIDDLE
> -);
> -
> #ifdef RTEMS_NEWLIB
> static Heap_Control _Malloc_Heap;
>
> -void RTEMS_Malloc_Initialize(
> +Heap_Control *RTEMS_Malloc_Initialize(
> const Memory_Information *mem,
> Heap_Initialization_or_extend_handler extend
> )
> {
> - if ( rtems_configuration_get_unified_work_area() ) {
> - RTEMS_Malloc_Heap = &_Workspace_Area;
> - } else {
> - Heap_Control *heap;
> - Heap_Initialization_or_extend_handler init_or_extend;
> - uintptr_t page_size;
> - size_t i;
> + Heap_Control *heap;
> + Heap_Initialization_or_extend_handler init_or_extend;
> + uintptr_t page_size;
> + size_t i;
>
> - heap = &_Malloc_Heap;
> - RTEMS_Malloc_Heap = heap;
> - init_or_extend = _Heap_Initialize;
> - page_size = CPU_HEAP_ALIGNMENT;
> + heap = &_Malloc_Heap;
> + RTEMS_Malloc_Heap = heap;
> + init_or_extend = _Heap_Initialize;
> + page_size = CPU_HEAP_ALIGNMENT;
>
> - for (i = 0; i < _Memory_Get_count( mem ); ++i) {
> - Memory_Area *area;
> - uintptr_t space_available;
> + for (i = 0; i < _Memory_Get_count( mem ); ++i) {
> + Memory_Area *area;
> + uintptr_t space_available;
>
> - area = _Memory_Get_area( mem, i );
> - space_available = ( *init_or_extend )(
> - heap,
> - _Memory_Get_free_begin( area ),
> - _Memory_Get_free_size( area ),
> - page_size
> - );
> + area = _Memory_Get_area( mem, i );
> + space_available = ( *init_or_extend )(
> + heap,
> + _Memory_Get_free_begin( area ),
> + _Memory_Get_free_size( area ),
> + page_size
> + );
>
> - if ( space_available > 0 ) {
> - _Memory_Consume( area, _Memory_Get_free_size( area ) );
> - init_or_extend = extend;
> - }
> + if ( space_available > 0 ) {
> + _Memory_Consume( area, _Memory_Get_free_size( area ) );
> + init_or_extend = extend;
> }
> + }
>
> - if ( init_or_extend == _Heap_Initialize ) {
> - _Internal_error( INTERNAL_ERROR_NO_MEMORY_FOR_HEAP );
> - }
> + if ( init_or_extend == _Heap_Initialize ) {
> + _Internal_error( INTERNAL_ERROR_NO_MEMORY_FOR_HEAP );
> }
> +
> + return heap;
> }
> #else
> -void RTEMS_Malloc_Initialize(
> +Heap_Control *RTEMS_Malloc_Initialize(
> const Memory_Information *mem,
> Heap_Initialization_or_extend_handler extend
> )
> {
> /* FIXME: Dummy function */
> + return NULL;
> }
> #endif
> +
> +Heap_Control *_Workspace_Malloc_initialize_separate( void )
> +{
> + return RTEMS_Malloc_Initialize( _Memory_Get(), _Heap_Extend );
> +}
> diff --git a/cpukit/libcsupport/src/mallocheap.c b/cpukit/libcsupport/src/mallocheap.c
> new file mode 100644
> index 0000000000..006362f209
> --- /dev/null
> +++ b/cpukit/libcsupport/src/mallocheap.c
> @@ -0,0 +1,56 @@
> +/* SPDX-License-Identifier: BSD-2-Clause */
> +
> +/**
> + * @file
> + *
> + * @ingroup MallocSupport
> + *
> + * @brief This source file provides the C Program Heap control along with the
> + * system initialization handler.
> + */
> +
> +/*
> + * Copyright (C) 2020 embedded brains GmbH (http://www.embedded-brains.de)
> + *
> + * 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.
> + *
> + * 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.
> + */
> +
> +#ifdef HAVE_CONFIG_H
> +#include "config.h"
> +#endif
> +
> +#include <rtems/malloc.h>
> +#include <rtems/sysinit.h>
> +#include <rtems/score/wkspacedata.h>
> +
> +Heap_Control *RTEMS_Malloc_Heap;
> +
> +static void _Malloc_Initialize( void )
> +{
> + RTEMS_Malloc_Heap = ( *_Workspace_Malloc_initializer )();
> +}
> +
> +RTEMS_SYSINIT_ITEM(
> + _Malloc_Initialize,
> + RTEMS_SYSINIT_MALLOC,
> + RTEMS_SYSINIT_ORDER_MIDDLE
> +);
> diff --git a/cpukit/score/src/wkspacemallocinitdefault.c b/cpukit/score/src/wkspacemallocinitdefault.c
> new file mode 100644
> index 0000000000..586c3eef7c
> --- /dev/null
> +++ b/cpukit/score/src/wkspacemallocinitdefault.c
> @@ -0,0 +1,44 @@
> +/* SPDX-License-Identifier: BSD-2-Clause */
> +
> +/**
> + * @file
> + *
> + * @ingroup RTEMSScoreWorkspace
> + *
> + * @brief This source file provides the default definition of
> + * _Workspace_Malloc_initializer.
> + */
> +
> +/*
> + * Copyright (C) 2020 embedded brains GmbH (http://www.embedded-brains.de)
> + *
> + * 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.
> + *
> + * 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.
> + */
> +
> +#ifdef HAVE_CONFIG_H
> +#include "config.h"
> +#endif
> +
> +#include <rtems/score/wkspacedata.h>
> +
> +struct Heap_Control *( * const _Workspace_Malloc_initializer )( void ) =
> + _Workspace_Malloc_initialize_separate;
> diff --git a/cpukit/score/src/wkspacemallocinitunified.c b/cpukit/score/src/wkspacemallocinitunified.c
> new file mode 100644
> index 0000000000..d90956c051
> --- /dev/null
> +++ b/cpukit/score/src/wkspacemallocinitunified.c
> @@ -0,0 +1,47 @@
> +/* SPDX-License-Identifier: BSD-2-Clause */
> +
> +/**
> + * @file
> + *
> + * @ingroup RTEMSScoreWorkspace
> + *
> + * @brief This source file provides the implementation of
> + * _Workspace_Malloc_initialize_unified().
> + */
> +
> +/*
> + * Copyright (C) 2020 embedded brains GmbH (http://www.embedded-brains.de)
> + *
> + * 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.
> + *
> + * 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.
> + */
> +
> +#ifdef HAVE_CONFIG_H
> +#include "config.h"
> +#endif
> +
> +#include <rtems/score/wkspacedata.h>
> +#include <rtems/score/wkspace.h>
> +
> +struct Heap_Control *_Workspace_Malloc_initialize_unified( void )
> +{
> + return &_Workspace_Area;
> +}
> diff --git a/spec/build/cpukit/librtemscpu.yml b/spec/build/cpukit/librtemscpu.yml
> index 21dc239b1b..2322e33996 100644
> --- a/spec/build/cpukit/librtemscpu.yml
> +++ b/spec/build/cpukit/librtemscpu.yml
> @@ -669,6 +669,7 @@ source:
> - cpukit/libcsupport/src/mallocextenddefault.c
> - cpukit/libcsupport/src/mallocfreespace.c
> - cpukit/libcsupport/src/mallocgetheapptr.c
> +- cpukit/libcsupport/src/mallocheap.c
> - cpukit/libcsupport/src/mallocinfo.c
> - cpukit/libcsupport/src/malloc_initialize.c
> - cpukit/libcsupport/src/_malloc_r.c
> @@ -1575,6 +1576,8 @@ source:
> - cpukit/score/src/watchdogtimeslicedefault.c
> - cpukit/score/src/wkspace.c
> - cpukit/score/src/wkspaceisunifieddefault.c
> +- cpukit/score/src/wkspacemallocinitdefault.c
> +- cpukit/score/src/wkspacemallocinitunified.c
> - cpukit/score/src/wkstringduplicate.c
> target: rtemscpu
> type: build
> --
> 2.26.2
>
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