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2008-01-08 Joel Sherrill <joel.sherrill@oarcorp.com>

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* libcsupport/Makefile.am: Add malloc_sbrk_helpers.c.
	* libcsupport/include/rtems/malloc.h,
	libcsupport/src/malloc.c, libcsupport/src/malloc_initialize.c,
	libcsupport/src/malloc_p.h,
	libcsupport/src/malloc_statistics_helpers.c: Make sbrk()
	support pluggable and optional.  This eliminates the need for
	heap extend and sbrk in the minimum footprint which is ~2.5K on
	the SPARC.
	* sapi/include/confdefs.h: Add the following configuration points:
	  + CONFIGURE_MALLOC_STATISTICS
	  + CONFIGURE_MALLOC_BSP_SUPPORTS_SBRK
	* libcsupport/src/malloc_sbrk_helpers.c: New file.
This commit is contained in:
Joel Sherrill
2008-01-08 22:59:14 +00:00
parent c8f8ffdd08
commit cfcc4e202d
9 changed files with 177 additions and 71 deletions
Download Patch File Download Diff File Expand all files Collapse all files

15
cpukit/ChangeLog
View File

@@ -1,3 +1,18 @@
2008-01-08 Joel Sherrill <joel.sherrill@oarcorp.com>
* libcsupport/Makefile.am: Add malloc_sbrk_helpers.c.
* libcsupport/include/rtems/malloc.h,
libcsupport/src/malloc.c, libcsupport/src/malloc_initialize.c,
libcsupport/src/malloc_p.h,
libcsupport/src/malloc_statistics_helpers.c: Make sbrk()
support pluggable and optional. This eliminates the need for
heap extend and sbrk in the minimum footprint which is ~2.5K on
the SPARC.
* sapi/include/confdefs.h: Add the following configuration points:
+ CONFIGURE_MALLOC_STATISTICS
+ CONFIGURE_MALLOC_BSP_SUPPORTS_SBRK
* libcsupport/src/malloc_sbrk_helpers.c: New file.
2008-01-08 Joel Sherrill <joel.sherrill@OARcorp.com>
* score/Makefile.am: Add missing file.

2
cpukit/libcsupport/Makefile.am
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@@ -84,7 +84,7 @@ MALLOC_C_FILES = src/malloc_initialize.c src/calloc.c src/malloc.c \
src/mallocinfo.c src/malloc_walk.c src/malloc_get_statistics.c \
src/malloc_report_statistics.c src/malloc_report_statistics_plugin.c \
src/malloc_statistics_helpers.c src/malloc_boundary.c src/posix_memalign.c \
src/malloc_deferred.c
src/malloc_deferred.c src/malloc_sbrk_helpers.c
PASSWORD_GROUP_C_FILES = src/getpwent.c

19
cpukit/libcsupport/include/rtems/malloc.h
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@@ -5,14 +5,14 @@
/*
* RTEMS Malloc Extensions
*
* COPYRIGHT (c) 1989-1997.
* COPYRIGHT (c) 1989-2007.
* On-Line Applications Research Corporation (OAR).
*
* The license and distribution terms for this file may in
* the file LICENSE in this distribution or at
* http://www.rtems.com/license/LICENSE.
*
* $ld:
* $Id$
*/
#ifndef _RTEMS_MALLOC_H
@@ -45,11 +45,11 @@ typedef struct {
void (*initialize)(void);
void (*at_malloc)(void *);
void (*at_free)(void *);
} rtems_malloc_statististics_functions_t;
} rtems_malloc_statistics_functions_t;
extern rtems_malloc_statististics_functions_t
extern rtems_malloc_statistics_functions_t
rtems_malloc_statistics_helpers_table;
extern rtems_malloc_statististics_functions_t *rtems_malloc_statistics_helpers;
extern rtems_malloc_statistics_functions_t *rtems_malloc_statistics_helpers;
/*
* Malloc boundary support plugin
@@ -65,7 +65,16 @@ typedef struct {
extern rtems_malloc_boundary_functions_t rtems_malloc_boundary_helpers_table;
extern rtems_malloc_boundary_functions_t *rtems_malloc_boundary_helpers;
/*
* Malloc Heap Extension (sbrk) plugin
*/
typedef struct {
void *(*initialize)(void *, size_t);
void *(*extend)(size_t);
} rtems_malloc_sbrk_functions_t;
extern rtems_malloc_sbrk_functions_t rtems_malloc_sbrk_helpers_table;
extern rtems_malloc_sbrk_functions_t *rtems_malloc_sbrk_helpers;
/** @brief Print Malloc Statistic Usage Report
*

32
cpukit/libcsupport/src/malloc.c
View File

@@ -27,9 +27,6 @@ void *malloc(
)
{
void *return_this;
void *starting_address;
uint32_t the_size;
uint32_t sbrk_amount;
Chain_Node *to_be_freed;
MSBUMP(malloc_calls, 1);
@@ -77,33 +74,8 @@ void *malloc(
return_this = _Protected_heap_Allocate( &RTEMS_Malloc_Heap, size );
if ( !return_this ) {
/*
* Round to the "requested sbrk amount" so hopefully we won't have
* to grow again for a while. This effectively does sbrk() calls
* in "page" amounts.
*/
sbrk_amount = RTEMS_Malloc_Sbrk_amount;
if ( sbrk_amount == 0 )
return (void *) 0;
the_size = ((size + sbrk_amount) / sbrk_amount * sbrk_amount);
if ((starting_address = (void *)sbrk(the_size))
== (void*) -1)
return (void *) 0;
if ( !_Protected_heap_Extend(
&RTEMS_Malloc_Heap, starting_address, the_size) ) {
sbrk(-the_size);
errno = ENOMEM;
return (void *) 0;
}
MSBUMP(space_available, the_size);
return_this = _Protected_heap_Allocate( &RTEMS_Malloc_Heap, size );
if (rtems_malloc_sbrk_helpers)
return_this = (*rtems_malloc_sbrk_helpers->extend)( size );
if ( !return_this ) {
errno = ENOMEM;
return (void *) 0;

39
cpukit/libcsupport/src/malloc_initialize.c
View File

@@ -22,7 +22,6 @@
Heap_Control RTEMS_Malloc_Heap;
Chain_Control RTEMS_Malloc_GC_list;
size_t RTEMS_Malloc_Sbrk_amount;
rtems_malloc_statistics_t rtems_malloc_statistics;
void RTEMS_Malloc_Initialize(
@@ -33,8 +32,6 @@ void RTEMS_Malloc_Initialize(
{
uint32_t status;
void *starting_address;
uintptr_t old_address;
uintptr_t uaddress;
#if defined(RTEMS_MALLOC_BOUNDARY_HELPERS)
/*
@@ -55,36 +52,18 @@ void RTEMS_Malloc_Initialize(
*/
Chain_Initialize_empty(&RTEMS_Malloc_GC_list);
/*
* If the starting address is 0 then we are to attempt to
* get length worth of memory using sbrk. Make sure we
* align the address that we get back.
*/
starting_address = start;
RTEMS_Malloc_Sbrk_amount = sbrk_amount;
if (!starting_address) {
uaddress = (uintptr_t)sbrk(length);
if (uaddress == (uintptr_t) -1) {
rtems_fatal_error_occurred( RTEMS_NO_MEMORY );
/* DOES NOT RETURN!!! */
}
if (uaddress & (CPU_HEAP_ALIGNMENT-1)) {
old_address = uaddress;
uaddress = (uaddress + CPU_HEAP_ALIGNMENT) & ~(CPU_HEAP_ALIGNMENT-1);
/*
* adjust the length by whatever we aligned by
*/
length -= uaddress - old_address;
}
starting_address = (void *)uaddress;
/*
* Initialize the optional sbrk support for extending the heap
*/
if (rtems_malloc_sbrk_helpers) {
starting_address = (*rtems_malloc_sbrk_helpers->initialize)(
start,
sbrk_amount
);
}
/*
* If the BSP is not clearing out the workspace, then it is most likely
* not clearing out the initial memory for the heap. There is no

1
cpukit/libcsupport/src/malloc_p.h
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@@ -39,7 +39,6 @@
*/
extern Heap_Control RTEMS_Malloc_Heap;
extern Chain_Control RTEMS_Malloc_GC_list;
extern size_t RTEMS_Malloc_Sbrk_amount;
/*
* Malloc Statistics Structure

111
cpukit/libcsupport/src/malloc_sbrk_helpers.c Normal file
View File

@@ -0,0 +1,111 @@
/*
* RTEMS Malloc Family Implementation --Initialization
*
*
* COPYRIGHT (c) 1989-2007.
* On-Line Applications Research Corporation (OAR).
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.com/license/LICENSE.
*
* $Id$
*/
#if HAVE_CONFIG_H
#include "config.h"
#endif
#include <rtems.h>
#include <rtems/malloc.h>
#include "malloc_p.h"
#include <errno.h>
size_t RTEMS_Malloc_Sbrk_amount;
void *malloc_sbrk_initialize(
void *starting_address,
size_t length
)
{
uintptr_t old_address;
uintptr_t uaddress;
RTEMS_Malloc_Sbrk_amount = length;
/*
* If the starting address is 0 then we are to attempt to
* get length worth of memory using sbrk. Make sure we
* align the address that we get back.
*/
if (!starting_address) {
uaddress = (uintptr_t)sbrk(length);
if (uaddress == (uintptr_t) -1) {
rtems_fatal_error_occurred( RTEMS_NO_MEMORY );
/* DOES NOT RETURN!!! */
}
if (uaddress & (CPU_HEAP_ALIGNMENT-1)) {
old_address = uaddress;
uaddress = (uaddress + CPU_HEAP_ALIGNMENT) & ~(CPU_HEAP_ALIGNMENT-1);
/*
* adjust the length by whatever we aligned by
*/
length -= uaddress - old_address;
}
starting_address = (void *)uaddress;
}
return starting_address;
}
void *malloc_sbrk_extend_and_allocate(
size_t size
)
{
uint32_t sbrk_amount;
void *starting_address;
uint32_t the_size;
void *return_this;
/*
* Round to the "requested sbrk amount" so hopefully we won't have
* to grow again for a while. This effectively does sbrk() calls
* in "page" amounts.
*/
sbrk_amount = RTEMS_Malloc_Sbrk_amount;
if ( sbrk_amount == 0 )
return (void *) 0;
the_size = ((size + sbrk_amount) / sbrk_amount * sbrk_amount);
starting_address = (void *) sbrk(the_size);
if ( starting_address == (void*) -1 )
return (void *) 0;
if ( !_Protected_heap_Extend(
&RTEMS_Malloc_Heap, starting_address, the_size) ) {
sbrk(-the_size);
errno = ENOMEM;
return (void *) 0;
}
MSBUMP(space_available, the_size);
return_this = _Protected_heap_Allocate( &RTEMS_Malloc_Heap, size );
return return_this;
}
rtems_malloc_sbrk_functions_t rtems_malloc_sbrk_helpers_table = {
malloc_sbrk_initialize,
malloc_sbrk_extend_and_allocate
};

5
cpukit/libcsupport/src/malloc_statistics_helpers.c
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@@ -66,14 +66,11 @@ void rtems_malloc_statistics_at_free(
}
}
rtems_malloc_statististics_functions_t rtems_malloc_statistics_helpers_table = {
rtems_malloc_statistics_functions_t rtems_malloc_statistics_helpers_table = {
rtems_malloc_statistics_initialize,
rtems_malloc_statistics_at_malloc,
rtems_malloc_statistics_at_free,
};
rtems_malloc_statististics_functions_t *rtems_malloc_statistics_helpers =
&rtems_malloc_statistics_helpers_table;
#endif

24
cpukit/sapi/include/confdefs.h
View File

@@ -242,6 +242,30 @@ extern int rtems_telnetd_maximum_ptys;
#endif
#endif
/*
* RTEMS Malloc configuration
*/
#include <rtems/malloc.h>
#ifdef CONFIGURE_INIT
rtems_malloc_statistics_functions_t *rtems_malloc_statistics_helpers =
#ifndef CONFIGURE_MALLOC_STATISTICS
NULL;
#else
&rtems_malloc_statistics_helpers_table;
#endif
#endif
#ifdef CONFIGURE_INIT
rtems_malloc_sbrk_functions_t *rtems_malloc_sbrk_helpers =
#ifndef CONFIGURE_MALLOC_BSP_SUPPORTS_SBRK
NULL;
#else
&rtems_malloc_sbrk_helpers_table;
#endif
#endif
/*
* Default User Initialization Task Table. This table guarantees that
* one user initialization table is defined.