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* lib/jit_aarch64-sz.c, lib/jit_arm-sz.c, lib/jit_hppa-sz.c, lib/jit_ia64-sz.c, lib/jit_mips-sz.c, lib/jit_ppc-sz.c, lib/jit_s390x-sz.c, lib/jit_size.c, lib/jit_sparc-sz.c, lib/jit_x86-sz.c: New files implementing static tables with longest known instructions length generated to match a lightning instruction. These tables should make it easier to make it very unlikely to ever miscalculate, or by too much, the size of a code buffer. * lib/jit_size.c: New file that aids to either collect jit code size information, or use the information depending on build options. * size.c: New helper file that parses input for, and create an initial jit_$arch-sz.c file, that needs some minor edit for arches with multiple configurations. * configure.ac, Makefile.am: Add the new, devel mode only --enable-devel-get-jit-size configure option, that sets compile time flags to collect jit code size information, that will be used as input for the "noinst size program". * lib/jit_aarch64.c, lib/jit_arm.c, lib/jit_disasm.c, lib/jit_hppa.c, lib/jit_ia64.c, lib/jit_memory.c, lib/jit_mips.c, lib/jit_ppc.c, lib/jit_s390x.c, lib/jit_sparc.c, lib/jit_x86.c, lib/lightning.c: Minor changes for the --enable-devel-get-jit-size build mode, as well as the "production build mode" with jit code size information.
105 lines
2.4 KiB
C
105 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 file is part of GNU lightning.
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*
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* GNU lightning is free software; you can redistribute it and/or modify it
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* under the terms of the GNU Lesser General Public License as published
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* by the Free Software Foundation; either version 3, or (at your option)
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* any later version.
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*
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* GNU lightning is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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* 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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#include <sys/mman.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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