[PATCH] Entangle the C Program Heap initialization
Joel Sherrill
joel at rtems.org
Thu Oct 1 15:44:44 UTC 2020
On Thu, Oct 1, 2020 at 10:07 AM Gedare Bloom <gedare at rtems.org> wrote:
> 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.
>
I think Entangle is the wrong work. Disentangle or possibly decouple.
Does minimum actually reflect what you think is the smallest possible
configuration now? That as always the test's purpose -- to have a single
executable that was the smallest we thought we could produce. It seems
with all your changes that it needs a review for tweaks to the
configuration.
--joel
--joel
>
> 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
> >
> > _______________________________________________
> > devel mailing list
> > devel at rtems.org
> > http://lists.rtems.org/mailman/listinfo/devel
> _______________________________________________
> devel mailing list
> devel at rtems.org
> http://lists.rtems.org/mailman/listinfo/devel
>
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