1 /* vm/jit/stack.h - stack analysis header
3 Copyright (C) 1996-2005, 2006 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
25 Contact: cacao@cacaojvm.org
27 Authors: Christian Thalinger
29 Changes: Christian Ullrich
32 $Id: stack.h 6062 2006-11-27 15:15:54Z edwin $
44 #include "vm/exceptions.h"
45 #include "vm/global.h"
46 #include "vm/jit/jit.h"
47 #include "vm/jit/reg.h"
50 /* macros used internally by analyse_stack ************************************/
52 /*--------------------------------------------------*/
53 /* BASIC TYPE CHECKING */
54 /*--------------------------------------------------*/
56 /* XXX would be nice if we did not have to pass the expected type */
58 #if defined(ENABLE_VERIFIER)
59 #define CHECK_BASIC_TYPE(expected,actual) \
61 if ((actual) != (expected)) { \
62 expectedtype = (expected); \
63 goto throw_stack_type_error; \
66 #else /* !ENABLE_VERIFIER */
67 #define CHECK_BASIC_TYPE(expected,actual)
68 #endif /* ENABLE_VERIFIER */
70 /*--------------------------------------------------*/
71 /* STACK UNDERFLOW/OVERFLOW CHECKS */
72 /*--------------------------------------------------*/
74 /* underflow checks */
76 #if defined(ENABLE_VERIFIER)
77 #define REQUIRE(num) \
79 if (stackdepth < (num)) \
80 goto throw_stack_underflow; \
82 #else /* !ENABLE_VERIFIER */
84 #endif /* ENABLE_VERIFIER */
88 /* We allow ACONST instructions inserted as arguments to builtin
89 * functions to exceed the maximum stack depth. Maybe we should check
90 * against maximum stack depth only at block boundaries?
93 /* XXX we should find a way to remove the opc/op1 check */
94 #if defined(ENABLE_VERIFIER)
95 #define CHECKOVERFLOW \
97 if (stackdepth > m->maxstack) \
98 if ((iptr->opc != ICMD_ACONST) || INSTRUCTION_MUST_CHECK(iptr))\
99 goto throw_stack_overflow; \
101 #else /* !ENABLE_VERIFIER */
102 #define CHECKOVERFLOW
103 #endif /* ENABLE_VERIFIER */
105 /*--------------------------------------------------*/
106 /* ALLOCATING STACK SLOTS */
107 /*--------------------------------------------------*/
109 #define NEWSTACK(s,v,n) \
111 sd.new->prev = curstack; \
112 sd.new->type = (s); \
114 sd.new->varkind = (v); \
115 sd.new->varnum = (n); \
117 sd.var[(n)].type = (s); \
118 sd.var[(n)].flags = 0; \
122 /* Initialize regoff, so -sia can show regnames even before reg.inc */
123 /* regs[rd->intregargnum] has to be set for this */
124 /* new->regoff = (IS_FLT_DBL_TYPE(s))?-1:rd->intreg_argnum; } */
126 #define NEWSTACKn(s,n) NEWSTACK(s,UNDEFVAR,n)
127 #define NEWSTACK0(s) NEWSTACK(s,UNDEFVAR,0)
130 /* function prototypes ********************************************************/
132 bool stack_init(void);
134 bool stack_analyse(jitdata *jd);
136 void stack_javalocals_store(instruction *iptr, s4 *javalocals);
138 #endif /* _STACK_H */
142 * These are local overrides for various environment variables in Emacs.
143 * Please do not remove this and leave it at the end of the file, where
144 * Emacs will automagically detect them.
145 * ---------------------------------------------------------------------
148 * indent-tabs-mode: t
152 * vim:noexpandtab:sw=4:ts=4: