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c39def9dce
* lib/jit_memory.c: Implement a simple memory allocation wrapper to allow overriding calls to malloc/calloc/realloc/free, as well as ensuring all memory containing pointers is zero or points to allocated memory. * include/lightning.h, include/lightning/jit_private.h: Definitions for the memory allocation wrapper. * lib/Makefile.am: Update for new jit_memory.c file. * lib/jit_arm.c, lib/jit_disasm.c, lib/jit_mips.c, lib/jit_note.c, lib/jit_ppc.c, lib/jit_sparc.c, lib/jit_x86.c, lib/lightning.c: Use the new memory allocation wrapper code.
102 lines
2.4 KiB
C
102 lines
2.4 KiB
C
/*
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* Copyright (C) 2013 Free Software Foundation, Inc.
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*
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* This is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This software is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* Authors:
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* Paulo Cesar Pereira de Andrade
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*/
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#include <lightning.h>
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#include <lightning/jit_private.h>
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/*
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* Prototypes
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*/
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static void *jit_default_alloc_func(size_t);
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static void *jit_default_realloc_func(void*, size_t);
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static void jit_default_free_func(void *);
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/*
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* Initialization
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*/
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static jit_alloc_func_ptr jit_alloc_ptr = jit_default_alloc_func;
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static jit_realloc_func_ptr jit_realloc_ptr = jit_default_realloc_func;
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static jit_free_func_ptr jit_free_ptr = jit_default_free_func;
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/*
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* Implementation
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*/
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void
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jit_set_memory_functions(jit_alloc_func_ptr alloc_ptr,
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jit_realloc_func_ptr realloc_ptr,
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jit_free_func_ptr free_ptr)
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{
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if (alloc_ptr == NULL)
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alloc_ptr = jit_default_alloc_func;
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if (realloc_ptr == NULL)
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realloc_ptr = jit_default_realloc_func;
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if (free_ptr == NULL)
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free_ptr = jit_default_free_func;
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jit_alloc_ptr = alloc_ptr;
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jit_realloc_ptr = realloc_ptr;
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jit_free_ptr = free_ptr;
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}
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void
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jit_get_memory_functions(jit_alloc_func_ptr *alloc_ptr,
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jit_realloc_func_ptr *realloc_ptr,
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jit_free_func_ptr *free_ptr)
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{
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*alloc_ptr = jit_alloc_ptr;
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*realloc_ptr = jit_realloc_ptr;
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*free_ptr = jit_free_ptr;
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}
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void
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jit_alloc(jit_pointer_t *ptr, jit_word_t size)
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{
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*ptr = (*jit_alloc_ptr)(size);
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memset(*ptr, 0, size);
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}
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void
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jit_realloc(jit_pointer_t *ptr, jit_word_t old_size, jit_word_t new_size)
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{
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*ptr = (*jit_realloc_ptr)(*ptr, new_size);
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if (old_size < new_size)
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memset((jit_int8_t*)*ptr + old_size, 0, new_size - old_size);
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}
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void
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jit_free(jit_pointer_t *ptr)
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{
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(*jit_free_ptr)(*ptr);
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*ptr = NULL;
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}
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static void *
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jit_default_alloc_func(size_t size)
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{
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return (malloc(size));
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}
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static void *
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jit_default_realloc_func(void *ptr, size_t size)
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{
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return (realloc(ptr, size));
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}
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static void
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jit_default_free_func(void *ptr)
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{
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free(ptr);
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}
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