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annotate mem.c @ 572:0f32f52fc98e

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Make some small changes in trans so that it is more likely to produce the same output as mustrans when given misbehaving programs. Add lea to testcases.txt. Improve the output of comparetest.py so that known issues can easily be separated from new ones.
author Michael Pavone <pavone@retrodev.com>
date Mon, 03 Mar 2014 21:08:43 -0800
parents 140af5509ce7
children b52cd6854c28
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 /*
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2 Copyright 2013 Michael Pavone
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3 This file is part of BlastEm.
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4 BlastEm is free software distributed under the terms of the GNU General Public License version 3 or greater. See COPYING for full license text.
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5 */
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6 #include <sys/mman.h>
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7 #include <stddef.h>
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8 #include <stdint.h>
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9 #include <stdlib.h>
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10 #include <unistd.h>
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11 #include "mem.h"
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12
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13 /*
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14 void * alloc_code(size_t *size)
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15 {
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16 *size += PAGE_SIZE - (*size & (PAGE_SIZE - 1));
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17 return mmap(NULL, *size, PROT_EXEC | PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
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18 }
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19 */
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20
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21 /*
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22 void * alloc_code(size_t *size)
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23 {
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24 char * ret = malloc(*size);
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25 char * base = (char *)(((intptr_t)ret) & (~(PAGE_SIZE-1)));
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26 mprotect(base, (ret + *size) - base, PROT_EXEC | PROT_READ | PROT_WRITE);
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27 return ret;
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28 }
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29 */
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30
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31 void * alloc_code(size_t *size)
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32 {
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33 *size += PAGE_SIZE - (*size & (PAGE_SIZE - 1));
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34 void * ret = sbrk(*size);
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35 if (ret == ((void *)-1)) {
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36 return NULL;
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37 }
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38 mprotect(ret, *size, PROT_EXEC | PROT_READ | PROT_WRITE);
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39 return ret;
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40 }