forked from Imagelibrary/rtems
7c658feb2e
PR 1472/cpukit * libcsupport/Makefile.am, libcsupport/include/rtems/malloc.h, libcsupport/src/free.c, libcsupport/src/malloc.c, libcsupport/src/malloc_initialize.c, libcsupport/src/realloc.c, libcsupport/src/rtems_memalign.c: Remove malloc boundary code. It has not been used since before 4.6 and is bitrotted. * libcsupport/src/malloc_boundary.c: Removed.
127 lines
3.3 KiB
C
127 lines
3.3 KiB
C
/**
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* @file
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*
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* @brief Malloc initialization implementation.
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*/
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/*
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* COPYRIGHT (c) 1989-2007.
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* On-Line Applications Research Corporation (OAR).
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*
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* The license and distribution terms for this file may be
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* found in the file LICENSE in this distribution or at
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* http://www.rtems.com/license/LICENSE.
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*
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* $Id$
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*/
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#if HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <rtems.h>
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#include <rtems/malloc.h>
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#include <rtems/score/wkspace.h>
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#include "malloc_p.h"
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/* FIXME: Dummy function */
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#ifndef RTEMS_NEWLIB
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void RTEMS_Malloc_Initialize(
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void *heap_begin,
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uintptr_t heap_size,
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size_t sbrk_amount
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)
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{
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}
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#else
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rtems_malloc_statistics_t rtems_malloc_statistics;
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extern bool rtems_unified_work_area;
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void RTEMS_Malloc_Initialize(
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void *heap_begin,
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uintptr_t heap_size,
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size_t sbrk_amount
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)
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{
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/*
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* If configured, initialize the statistics support
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*/
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if ( rtems_malloc_statistics_helpers != NULL ) {
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(*rtems_malloc_statistics_helpers->initialize)();
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}
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/*
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* Initialize the garbage collection list to start with nothing on it.
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*/
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malloc_deferred_frees_initialize();
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/*
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* Initialize the optional sbrk support for extending the heap
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*/
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if ( rtems_malloc_sbrk_helpers != NULL ) {
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void *new_heap_begin = (*rtems_malloc_sbrk_helpers->initialize)(
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heap_begin,
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sbrk_amount
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);
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heap_size -= (uintptr_t) new_heap_begin - (uintptr_t) heap_begin;
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heap_begin = new_heap_begin;
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}
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/*
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* If this system is configured to use the same heap for
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* the RTEMS Workspace and C Program Heap, then we need to
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* be very very careful about destroying the initialization
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* that has already been done.
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*/
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/*
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* If the BSP is not clearing out the workspace, then it is most likely
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* not clearing out the initial memory for the heap. There is no
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* standard supporting zeroing out the heap memory. But much code
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* with UNIX history seems to assume that memory malloc'ed during
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* initialization (before any free's) is zero'ed. This is true most
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* of the time under UNIX because zero'ing memory when it is first
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* given to a process eliminates the chance of a process seeing data
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* left over from another process. This would be a security violation.
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*/
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if (
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!rtems_unified_work_area
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&& rtems_configuration_get_do_zero_of_workspace()
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) {
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memset( heap_begin, 0, heap_size );
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}
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/*
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* Unfortunately we cannot use assert if this fails because if this
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* has failed we do not have a heap and if we do not have a heap
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* STDIO cannot work because there will be no buffers.
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*/
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if ( !rtems_unified_work_area ) {
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uintptr_t status = _Protected_heap_Initialize(
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RTEMS_Malloc_Heap,
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heap_begin,
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heap_size,
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CPU_HEAP_ALIGNMENT
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);
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if ( status == 0 ) {
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rtems_fatal_error_occurred( RTEMS_NO_MEMORY );
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}
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}
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MSBUMP( space_available, _Protected_heap_Get_size(RTEMS_Malloc_Heap) );
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#if defined(RTEMS_HEAP_DEBUG)
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if ( _Protected_heap_Walk( RTEMS_Malloc_Heap, 0, false ) ) {
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printk( "Malloc heap not initialized correctly\n" );
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rtems_print_buffer( heap_begin, 32 );
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printk( "\n" );
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rtems_print_buffer( (heap_begin + heap_size) - 48, 48 );
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rtems_fatal_error_occurred( RTEMS_NO_MEMORY );
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}
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#endif
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}
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#endif
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