mirror of
https://gitlab.rtems.org/rtems/rtos/rtems.git
synced 2026-08-25 20:49:52 +08:00
Joel Sherrill
635865aefd
* libcsupport/Makefile.am, libcsupport/include/rtems/malloc.h, libcsupport/src/free.c, libcsupport/src/malloc.c, libcsupport/src/malloc_deferred.c, libcsupport/src/malloc_initialize.c, libcsupport/src/malloc_p.h, libcsupport/src/malloc_sbrk_helpers.c, libcsupport/src/posix_memalign.c: Place all deferred free code and place it in subroutines. Add plugin for dirtying allocated memory to assist in debugging. Clean up comments and spacing as needed. * libcsupport/src/malloc_dirtier.c: New file.
108 lines
2.3 KiB
C
108 lines
2.3 KiB
C
/*
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* RTEMS Malloc Family 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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#ifdef RTEMS_NEWLIB
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#include <stdlib.h>
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#include <errno.h>
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#include "malloc_p.h"
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void *malloc(
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size_t size
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)
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{
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void *return_this;
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MSBUMP(malloc_calls, 1);
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/*
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* If some free's have been deferred, then do them now.
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*/
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malloc_deferred_frees_process();
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/*
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* Validate the parameters
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*/
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if ( !size )
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return (void *) 0;
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/*
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* Do not attempt to allocate memory if not in correct system state.
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*/
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if ( _System_state_Is_up(_System_state_Get()) &&
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!malloc_is_system_state_OK() )
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return NULL;
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/*
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* Walk the heap and verify its integrity
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*/
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#if defined(RTEMS_HEAP_DEBUG)
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_Protected_heap_Walk( &RTEMS_Malloc_Heap, 0, FALSE );
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#endif
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#if defined(RTEMS_MALLOC_BOUNDARY_HELPERS)
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/*
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* If the support for a boundary area at the end of the heap
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* block allocated is turned on, then adjust the size.
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*/
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if (rtems_malloc_boundary_helpers)
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size += (*rtems_malloc_boundary_helpers->overhead)();
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#endif
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/*
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* Try to give a segment in the current heap if there is not
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* enough space then try to grow the heap.
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* If this fails then return a NULL pointer.
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*/
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return_this = _Protected_heap_Allocate( &RTEMS_Malloc_Heap, size );
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if ( !return_this ) {
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if (rtems_malloc_sbrk_helpers)
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return_this = (*rtems_malloc_sbrk_helpers->extend)( size );
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if ( !return_this ) {
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errno = ENOMEM;
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return (void *) 0;
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}
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}
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/*
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* If the user wants us to dirty the allocated memory, then do it.
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*/
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if ( rtems_malloc_dirty_helper )
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(*rtems_malloc_dirty_helper)( return_this, size );
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/*
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* If configured, update the statistics
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*/
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if ( rtems_malloc_statistics_helpers )
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(*rtems_malloc_statistics_helpers->at_malloc)(return_this);
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#if defined(RTEMS_MALLOC_BOUNDARY_HELPERS)
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/*
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* If configured, set the boundary area
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*/
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if (rtems_malloc_boundary_helpers)
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(*rtems_malloc_boundary_helpers->at_malloc)(return_this, size);
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#endif
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return return_this;
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}
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#endif
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