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a665fffff1
checking code. It never actually worked. The bit that does work is the stack usage measurement code, plus the bit that sets up the the custom stack according to local setting or by calling a query function. git-svn-id: file:///Users/olsen/Code/migration-svn-zu-git/logical-line-staging/clib2/trunk@15212 87f5fb63-7c3d-0410-a384-fd976d0f7a62
99 lines
3.2 KiB
C
99 lines
3.2 KiB
C
/*
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* $Id: stdlib_stack_usage.c,v 1.8 2010-10-20 13:50:17 obarthel Exp $
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*
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* :ts=4
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*
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* Portable ISO 'C' (1994) runtime library for the Amiga computer
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* Copyright (c) 2002-2006 by Olaf Barthel <olsen (at) sourcery.han.de>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* - Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* - Neither the name of Olaf Barthel nor the names of contributors
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* may be used to endorse or promote products derived from this
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* software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef NDEBUG
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/****************************************************************************/
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#include "stdlib_headers.h"
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/****************************************************************************/
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static struct StackSwapStruct stack_swap_struct;
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/****************************************************************************/
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#define STACK_FILL_COOKIE 0xA1
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/****************************************************************************/
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void
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__stack_usage_init(struct StackSwapStruct * stk)
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{
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if(stk != NULL)
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{
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size_t stack_size = ((ULONG)stk->stk_Upper - (ULONG)stk->stk_Lower);
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memset(stk->stk_Lower,STACK_FILL_COOKIE,stack_size);
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stack_swap_struct = (*stk);
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}
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}
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/****************************************************************************/
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void
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__stack_usage_exit(void)
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{
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if(stack_swap_struct.stk_Lower != NULL && stack_swap_struct.stk_Upper != 0)
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{
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const UBYTE * m = (const UBYTE *)stack_swap_struct.stk_Lower;
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size_t stack_size = ((ULONG)stack_swap_struct.stk_Upper - (ULONG)stack_swap_struct.stk_Lower);
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size_t total,i;
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total = 0;
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/* Figure out how much of the stack was used by checking
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if the fill pattern was overwritten. */
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for(i = 0 ; i < stack_size ; i++)
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{
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/* Strangely, the first long word is always trashed,
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even if the stack doesn't grow down this far... */
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if(i > sizeof(LONG) && m[i] != STACK_FILL_COOKIE)
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break;
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total++;
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}
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kprintf("[%s] total amount of stack space used = %ld bytes\n",
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__program_name,stack_size - total);
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stack_swap_struct.stk_Lower = NULL;
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stack_swap_struct.stk_Upper = 0;
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}
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}
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/****************************************************************************/
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#endif /* NDEBUG */
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