1 /* src/vm/jit/code.c - codeinfo struct for representing compiled code
3 Copyright (C) 1996-2005, 2006, 2007 R. Grafl, A. Krall, C. Kruegel,
4 C. Oates, R. Obermaisser, M. Platter, M. Probst, S. Ring,
5 E. Steiner, C. Thalinger, D. Thuernbeck, P. Tomsich, C. Ullrich,
6 J. Wenninger, Institut f. Computersprachen - TU Wien
8 This file is part of CACAO.
10 This program is free software; you can redistribute it and/or
11 modify it under the terms of the GNU General Public License as
12 published by the Free Software Foundation; either version 2, or (at
13 your option) any later version.
15 This program is distributed in the hope that it will be useful, but
16 WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 General Public License for more details.
20 You should have received a copy of the GNU General Public License
21 along with this program; if not, write to the Free Software
22 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
38 #include "mm/memory.h"
40 #if defined(ENABLE_THREADS)
41 # include "threads/native/lock.h"
44 #include "vm/jit/code.h"
45 #include "vm/jit/codegen-common.h"
46 #include "vm/jit/methodheader.h"
47 #include "vm/jit/patcher-common.h"
49 #include "vmcore/options.h"
52 /* code_init *******************************************************************
54 Initialize the code-subsystem.
56 *******************************************************************************/
60 /* check for offset of code->m == 0 (see comment in code.h) */
62 assert(OFFSET(codeinfo, m) == 0);
70 /* code_codeinfo_new ***********************************************************
72 Create a new codeinfo for the given method.
75 m................method to create a new codeinfo for
77 The following fields are set in codeinfo:
82 a new, initialized codeinfo, or
83 NULL if an exception occurred.
85 *******************************************************************************/
87 codeinfo *code_codeinfo_new(methodinfo *m)
95 patcher_list_create(code);
97 #if defined(ENABLE_STATISTICS)
99 size_codeinfo += sizeof(codeinfo);
106 /* code_find_codeinfo_for_pc ***************************************************
108 Return the codeinfo for the compilation unit that contains the
112 pc...............machine code position
115 the codeinfo * for the given PC
117 *******************************************************************************/
119 codeinfo *code_find_codeinfo_for_pc(u1 *pc)
123 pv = codegen_get_pv_from_pc(pc);
126 return *(codeinfo **)(pv + CodeinfoPointer);
130 /* code_get_methodinfo_for_pv **************************************************
132 Return the methodinfo for the given PV.
140 *******************************************************************************/
142 methodinfo *code_get_methodinfo_for_pv(u1 *pv)
146 code = *((codeinfo **) (pv + CodeinfoPointer));
152 /* code_get_sync_slot_count ****************************************************
154 Return the number of stack slots used for storing the synchronized object
155 (and the return value around lock_monitor_exit calls) by the given code.
158 code.............the codeinfo of the code in question
162 the number of stack slots used for synchronization
164 *******************************************************************************/
166 #if defined(ENABLE_REPLACEMENT)
167 int code_get_sync_slot_count(codeinfo *code)
169 #ifdef ENABLE_THREADS
177 if (!(code->m->flags & ACC_SYNCHRONIZED))
182 #ifdef HAS_4BYTE_STACKSLOT
183 /* long and double need 2 4-byte slots */
184 if (IS_2_WORD_TYPE(code->m->parseddesc->returntype.type))
188 #if defined(__POWERPC__)
189 /* powerpc needs an extra slot */
195 #else /* !ENABLE_THREADS */
199 #endif /* ENABLE_THREADS */
201 #endif /* defined(ENABLE_REPLACEMENT) */
204 /* code_codeinfo_free **********************************************************
206 Free the memory used by a codeinfo.
209 code.............the codeinfo to free
211 *******************************************************************************/
213 void code_codeinfo_free(codeinfo *code)
218 if (code->mcode != NULL)
219 CFREE((void *) (ptrint) code->mcode, code->mcodelength);
221 patcher_list_free(code);
223 #if defined(ENABLE_REPLACEMENT)
224 replace_free_replacement_points(code);
227 FREE(code, codeinfo);
229 #if defined(ENABLE_STATISTICS)
231 size_codeinfo -= sizeof(codeinfo);
236 /* code_free_code_of_method ****************************************************
238 Free all codeinfos of the given method
241 m................the method of which the codeinfos are to be freed
243 *******************************************************************************/
245 void code_free_code_of_method(methodinfo *m)
256 nextcode = code->prev;
257 code_codeinfo_free(code);
264 * These are local overrides for various environment variables in Emacs.
265 * Please do not remove this and leave it at the end of the file, where
266 * Emacs will automagically detect them.
267 * ---------------------------------------------------------------------
270 * indent-tabs-mode: t
274 * vim:noexpandtab:sw=4:ts=4: