-/* jit/stack.h - stack analysis header
+/* vm/jit/stack.h - stack analysis header
- Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003
- R. Grafl, A. Krall, C. Kruegel, C. Oates, R. Obermaisser,
- M. Probst, S. Ring, E. Steiner, C. Thalinger, D. Thuernbeck,
- P. Tomsich, J. Wenninger
+ Copyright (C) 1996-2005, 2006 R. Grafl, A. Krall, C. Kruegel,
+ C. Oates, R. Obermaisser, M. Platter, M. Probst, S. Ring,
+ E. Steiner, C. Thalinger, D. Thuernbeck, P. Tomsich, C. Ullrich,
+ J. Wenninger, Institut f. Computersprachen - TU Wien
This file is part of CACAO.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
- Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
- 02111-1307, USA.
+ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ 02110-1301, USA.
- Contact: cacao@complang.tuwien.ac.at
+ Contact: cacao@cacaojvm.org
Authors: Christian Thalinger
- $Id: stack.h 1203 2004-06-22 23:14:55Z twisti $
+ Changes: Christian Ullrich
+
+ $Id: stack.h 5436 2006-09-08 19:48:27Z edwin $
*/
#ifndef _STACK_H
#define _STACK_H
+#include "config.h"
+
+#include "vm/types.h"
+
+#include "vm/exceptions.h"
+#include "vm/global.h"
+#include "vm/jit/jit.h"
+#include "vm/jit/reg.h"
+
+
+/* macros used internally by analyse_stack ************************************/
+
+/* convenient abbreviations */
+#define CURKIND curstack->varkind
+#define CURTYPE curstack->type
+
+
+/*--------------------------------------------------*/
+/* STACK DEPTH CHECKING */
+/*--------------------------------------------------*/
+
+#if defined(ENABLE_VERIFIER)
+#define CHECK_STACK_DEPTH(depthA,depthB) \
+ do { \
+ if ((depthA) != (depthB)) \
+ goto throw_stack_depth_error; \
+ } while (0)
+#else /* !ENABLE_VERIFIER */
+#define CHECK_STACK_DEPTH(depthA,depthB)
+#endif /* ENABLE_VERIFIER */
-#include "global.h"
+/*--------------------------------------------------*/
+/* BASIC TYPE CHECKING */
+/*--------------------------------------------------*/
-/* function prototypes */
+/* XXX would be nice if we did not have to pass the expected type */
-methodinfo *analyse_stack(methodinfo *m);
+#if defined(ENABLE_VERIFIER)
+#define CHECK_BASIC_TYPE(expected,actual) \
+ do { \
+ if ((actual) != (expected)) { \
+ expectedtype = (expected); \
+ goto throw_stack_type_error; \
+ } \
+ } while (0)
+#else /* !ENABLE_VERIFIER */
+#define CHECK_BASIC_TYPE(expected,actual)
+#endif /* ENABLE_VERIFIER */
-void icmd_print_stack(methodinfo *m, stackptr s);
-char *icmd_builtin_name(functionptr bptr);
-void show_icmd_method(methodinfo *m);
-void show_icmd_block(methodinfo *m, basicblock *bptr);
-void show_icmd(instruction *iptr, bool deadcode);
+/*--------------------------------------------------*/
+/* STACK UNDERFLOW/OVERFLOW CHECKS */
+/*--------------------------------------------------*/
+
+/* underflow checks */
+
+#if defined(ENABLE_VERIFIER)
+#define REQUIRE(num) \
+ do { \
+ if (stackdepth < (num)) \
+ goto throw_stack_underflow; \
+ } while (0)
+#else /* !ENABLE_VERIFIER */
+#define REQUIRE(num)
+#endif /* ENABLE_VERIFIER */
+
+#define REQUIRE_1 REQUIRE(1)
+#define REQUIRE_2 REQUIRE(2)
+#define REQUIRE_3 REQUIRE(3)
+#define REQUIRE_4 REQUIRE(4)
+
+
+/* overflow check */
+/* We allow ACONST instructions inserted as arguments to builtin
+ * functions to exceed the maximum stack depth. Maybe we should check
+ * against maximum stack depth only at block boundaries?
+ */
+
+/* XXX we should find a way to remove the opc/op1 check */
+#if defined(ENABLE_VERIFIER)
+#define CHECKOVERFLOW \
+ do { \
+ if (stackdepth > m->maxstack) \
+ if ((iptr->opc != ICMD_ACONST) || INSTRUCTION_MUST_CHECK(iptr))\
+ goto throw_stack_overflow; \
+ } while(0)
+#else /* !ENABLE_VERIFIER */
+#define CHECKOVERFLOW
+#endif /* ENABLE_VERIFIER */
+
+/*--------------------------------------------------*/
+/* ALLOCATING STACK SLOTS */
+/*--------------------------------------------------*/
+
+#define NEWSTACK(s,v,n) \
+ do { \
+ sd.new->prev = curstack; \
+ sd.new->type = (s); \
+ sd.new->flags = 0; \
+ sd.new->varkind = (v); \
+ sd.new->varnum = (n); \
+ curstack = sd.new; \
+ sd.var[(n)].type = (s); \
+ sd.var[(n)].flags = 0; \
+ sd.new++; \
+ } while (0)
+
+/* Initialize regoff, so -sia can show regnames even before reg.inc */
+/* regs[rd->intregargnum] has to be set for this */
+/* new->regoff = (IS_FLT_DBL_TYPE(s))?-1:rd->intreg_argnum; } */
+
+#define NEWSTACKn(s,n) NEWSTACK(s,UNDEFVAR,n)
+#define NEWSTACK0(s) NEWSTACK(s,UNDEFVAR,0)
+
+
+/*--------------------------------------------------*/
+/* MACROS FOR HANDLING BASIC BLOCKS */
+/*--------------------------------------------------*/
+
+/* COPYCURSTACK makes a copy of the current operand stack (curstack)
+ * and returns it in the variable copy.
+ *
+ * This macro is used to propagate the operand stack from one basic
+ * block to another. The destination block receives the copy as its
+ * input stack.
+ */
+#define COPYCURSTACK(sd, copy) { \
+ stackptr s; \
+ if (curstack) { \
+ s = curstack; \
+ (sd).new += stackdepth; \
+ copy = (sd).new; \
+ while (s) { \
+ copy--; \
+ copy->prev = copy-1; \
+ copy->creator = NULL; \
+ copy->type = s->type; \
+ copy->flags = 0; \
+ copy->varkind = STACKVAR; \
+ copy->varnum = s->varnum; \
+ SET_OUTVAR((sd), s); \
+ s = s->prev; \
+ } \
+ copy->prev = NULL; \
+ copy = (sd).new-1; \
+ } \
+ else \
+ copy = NULL; \
+}
+
+
+/* external macros ************************************************************/
+
+#define BLOCK_OF(index) \
+ (jd->new_basicblocks + jd->new_basicblockindex[index])
+
+
+/* function prototypes ********************************************************/
+
+bool stack_init(void);
+
+bool new_stack_analyse(jitdata *jd);
#endif /* _STACK_H */
* c-basic-offset: 4
* tab-width: 4
* End:
+ * vim:noexpandtab:sw=4:ts=4:
*/
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