1 /* src/vm/jit/code.c - codeinfo struct for representing compiled code
3 Copyright (C) 1996-2005, 2006, 2007, 2008
4 CACAOVM - Verein zur Foerderung der freien virtuellen Maschine CACAO
6 This file is part of CACAO.
8 This program is free software; you can redistribute it and/or
9 modify it under the terms of the GNU General Public License as
10 published by the Free Software Foundation; either version 2, or (at
11 your option) any later version.
13 This program is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
33 #include "mm/memory.h"
37 #include "vm/jit/code.h"
38 #include "vm/jit/codegen-common.h"
39 #include "vm/jit/patcher-common.h"
40 #include "vm/jit/methodtree.h"
42 #include "vmcore/options.h"
45 /* code_init *******************************************************************
47 Initialize the code-subsystem.
49 *******************************************************************************/
53 /* Check if offset of codeinfo.m == 0 (see comment in code.h). */
55 if (OFFSET(codeinfo, m) != 0)
56 vm_abort("code_init: offset of codeinfo.m != 0: %d != 0", OFFSET(codeinfo, m));
60 /* code_codeinfo_new ***********************************************************
62 Create a new codeinfo for the given method.
65 m................method to create a new codeinfo for
67 The following fields are set in codeinfo:
72 a new, initialized codeinfo, or
73 NULL if an exception occurred.
75 *******************************************************************************/
77 codeinfo *code_codeinfo_new(methodinfo *m)
85 patcher_list_create(code);
87 #if defined(ENABLE_STATISTICS)
89 size_codeinfo += sizeof(codeinfo);
96 /* code_find_codeinfo_for_pc ***************************************************
98 Return the codeinfo for the compilation unit that contains the
102 pc...............machine code position
105 the codeinfo * for the given PC
107 *******************************************************************************/
109 codeinfo *code_find_codeinfo_for_pc(void *pc)
113 pv = methodtree_find(pc);
115 return code_get_codeinfo_for_pv(pv);
119 /* code_find_codeinfo_for_pc ***************************************************
121 Return the codeinfo for the compilation unit that contains the
122 given PC. This method does not check the return value and is used
126 pc...............machine code position
129 the codeinfo * for the given PC, or NULL
131 *******************************************************************************/
133 codeinfo *code_find_codeinfo_for_pc_nocheck(void *pc)
137 pv = methodtree_find_nocheck(pc);
142 return code_get_codeinfo_for_pv(pv);
146 /* code_get_methodinfo_for_pv **************************************************
148 Return the methodinfo for the given PV.
156 *******************************************************************************/
158 methodinfo *code_get_methodinfo_for_pv(void *pv)
162 code = code_get_codeinfo_for_pv(pv);
164 /* This is the case for asm_vm_call_method. */
173 /* code_get_sync_slot_count ****************************************************
175 Return the number of stack slots used for storing the synchronized object
176 (and the return value around lock_monitor_exit calls) by the given code.
179 code.............the codeinfo of the code in question
183 the number of stack slots used for synchronization
185 *******************************************************************************/
187 #if defined(ENABLE_REPLACEMENT)
188 int code_get_sync_slot_count(codeinfo *code)
190 #ifdef ENABLE_THREADS
198 if (!code_is_synchronized(code))
203 #ifdef HAS_4BYTE_STACKSLOT
204 /* long and double need 2 4-byte slots */
205 if (IS_2_WORD_TYPE(code->m->parseddesc->returntype.type))
209 #if defined(__POWERPC__)
210 /* powerpc needs an extra slot */
216 #else /* !ENABLE_THREADS */
220 #endif /* ENABLE_THREADS */
222 #endif /* defined(ENABLE_REPLACEMENT) */
225 /* code_codeinfo_free **********************************************************
227 Free the memory used by a codeinfo.
230 code.............the codeinfo to free
232 *******************************************************************************/
234 void code_codeinfo_free(codeinfo *code)
239 if (code->mcode != NULL)
240 CFREE((void *) (ptrint) code->mcode, code->mcodelength);
242 patcher_list_free(code);
244 #if defined(ENABLE_REPLACEMENT)
245 replace_free_replacement_points(code);
248 FREE(code, codeinfo);
250 #if defined(ENABLE_STATISTICS)
252 size_codeinfo -= sizeof(codeinfo);
257 /* code_free_code_of_method ****************************************************
259 Free all codeinfos of the given method
262 m................the method of which the codeinfos are to be freed
264 *******************************************************************************/
266 void code_free_code_of_method(methodinfo *m)
277 nextcode = code->prev;
278 code_codeinfo_free(code);
285 * These are local overrides for various environment variables in Emacs.
286 * Please do not remove this and leave it at the end of the file, where
287 * Emacs will automagically detect them.
288 * ---------------------------------------------------------------------
291 * indent-tabs-mode: t
295 * vim:noexpandtab:sw=4:ts=4: