2 * File expr.c - expression handling for Wine internal debugger.
4 * Copyright (C) 1997, Eric Youngdale.
12 #include "wine/winbase16.h"
66 struct datatype * cast;
73 const char * element_name;
85 const char * funcname;
94 #define EXPR_TYPE_CONST 0
95 #define EXPR_TYPE_US_CONST 1
96 #define EXPR_TYPE_SYMBOL 2
97 #define EXPR_TYPE_INTVAR 3
98 #define EXPR_TYPE_BINOP 4
99 #define EXPR_TYPE_UNOP 5
100 #define EXPR_TYPE_STRUCT 6
101 #define EXPR_TYPE_PSTRUCT 7
102 #define EXPR_TYPE_ARRAY 8
103 #define EXPR_TYPE_CALL 9
104 #define EXPR_TYPE_STRING 10
105 #define EXPR_TYPE_CAST 11
107 static char expr_list[4096];
108 static unsigned int next_expr_free = 0;
111 * This is how we turn an expression address into the actual value.
112 * This works well in the 32 bit domain - not sure at all about the
115 #define VAL(_exp) DEBUG_GetExprValue(&_exp, NULL)
119 DEBUG_GetFreeExpr(void)
123 rtn = (struct expr *) &expr_list[next_expr_free];
125 next_expr_free += sizeof(struct expr);
126 assert(next_expr_free < sizeof(expr_list));
132 DEBUG_FreeExprMem(void)
138 DEBUG_TypeCastExpr(struct datatype * dt, struct expr * exp)
142 ex = DEBUG_GetFreeExpr();
144 ex->type = EXPR_TYPE_CAST;
145 ex->un.cast.cast = dt;
146 ex->un.cast.expr = exp;
151 DEBUG_IntVarExpr(const char* name)
155 ex = DEBUG_GetFreeExpr();
157 ex->type = EXPR_TYPE_INTVAR;
158 ex->un.intvar.name = name;
163 DEBUG_SymbolExpr(const char * name)
167 ex = DEBUG_GetFreeExpr();
169 ex->type = EXPR_TYPE_SYMBOL;
170 ex->un.symbol.name = name;
175 DEBUG_ConstExpr(int value)
179 ex = DEBUG_GetFreeExpr();
181 ex->type = EXPR_TYPE_CONST;
182 ex->un.constant.value = value;
187 DEBUG_StringExpr(const char * str)
191 ex = DEBUG_GetFreeExpr();
193 ex->type = EXPR_TYPE_STRING;
194 ex->un.string.str = str+1;
195 pnt = strrchr(ex->un.string.str, '"');
204 DEBUG_USConstExpr(unsigned int value)
208 ex = DEBUG_GetFreeExpr();
210 ex->type = EXPR_TYPE_CONST;
211 ex->un.u_const.value = value;
216 DEBUG_BinopExpr(int operator_type, struct expr * exp1, struct expr * exp2)
220 ex = DEBUG_GetFreeExpr();
222 ex->type = EXPR_TYPE_BINOP;
223 ex->un.binop.binop_type = operator_type;
224 ex->un.binop.exp1 = exp1;
225 ex->un.binop.exp2 = exp2;
230 DEBUG_UnopExpr(int operator_type, struct expr * exp1)
234 ex = DEBUG_GetFreeExpr();
236 ex->type = EXPR_TYPE_UNOP;
237 ex->un.unop.unop_type = operator_type;
238 ex->un.unop.exp1 = exp1;
243 DEBUG_StructExpr(struct expr * exp, const char * element)
247 ex = DEBUG_GetFreeExpr();
249 ex->type = EXPR_TYPE_STRUCT;
250 ex->un.structure.exp1 = exp;
251 ex->un.structure.element_name = element;
256 DEBUG_StructPExpr(struct expr * exp, const char * element)
260 ex = DEBUG_GetFreeExpr();
262 ex->type = EXPR_TYPE_PSTRUCT;
263 ex->un.structure.exp1 = exp;
264 ex->un.structure.element_name = element;
269 DEBUG_CallExpr(const char * funcname, int nargs, ...)
275 ex = DEBUG_GetFreeExpr();
277 ex->type = EXPR_TYPE_CALL;
278 ex->un.call.funcname = funcname;
279 ex->un.call.nargs = nargs;
282 for(i=0; i < nargs; i++)
284 ex->un.call.arg[i] = va_arg(ap, struct expr *);
290 DBG_VALUE DEBUG_EvalExpr(struct expr * exp)
296 unsigned int cexp[5];
300 struct datatype * type1;
301 struct datatype * type2;
304 rtn.cookie = DV_INVALID;
311 rtn = DEBUG_EvalExpr(exp->un.cast.expr);
312 rtn.type = exp->un.cast.cast;
313 if (DEBUG_GetType(rtn.type) == DT_POINTER)
314 rtn.cookie = DV_TARGET;
316 case EXPR_TYPE_STRING:
317 rtn.type = DEBUG_TypeString;
318 rtn.cookie = DV_HOST;
319 rtn.addr.off = (unsigned int) &exp->un.string.str;
322 case EXPR_TYPE_CONST:
323 rtn.type = DEBUG_TypeIntConst;
324 rtn.cookie = DV_HOST;
325 rtn.addr.off = (unsigned int) &exp->un.constant.value;
328 case EXPR_TYPE_US_CONST:
329 rtn.type = DEBUG_TypeUSInt;
330 rtn.cookie = DV_HOST;
331 rtn.addr.off = (unsigned int) &exp->un.u_const.value;
334 case EXPR_TYPE_SYMBOL:
335 if( !DEBUG_GetSymbolValue(exp->un.symbol.name, -1, &rtn, FALSE) )
337 RaiseException(DEBUG_STATUS_NO_SYMBOL, 0, 0, NULL);
340 case EXPR_TYPE_PSTRUCT:
341 exp1 = DEBUG_EvalExpr(exp->un.structure.exp1);
342 if( exp1.type == NULL )
344 RaiseException(DEBUG_STATUS_BAD_TYPE, 0, 0, NULL);
346 rtn.cookie = DV_TARGET;
347 rtn.addr.off = DEBUG_TypeDerefPointer(&exp1, &type1);
350 RaiseException(DEBUG_STATUS_BAD_TYPE, 0, 0, NULL);
353 DEBUG_FindStructElement(&rtn, exp->un.structure.element_name,
354 &exp->un.structure.result);
356 case EXPR_TYPE_STRUCT:
357 exp1 = DEBUG_EvalExpr(exp->un.structure.exp1);
358 if( exp1.type == NULL )
360 RaiseException(DEBUG_STATUS_BAD_TYPE, 0, 0, NULL);
363 DEBUG_FindStructElement(&rtn, exp->un.structure.element_name,
364 &exp->un.structure.result);
368 * First, evaluate all of the arguments. If any of them are not
369 * evaluable, then bail.
371 for(i=0; i < exp->un.call.nargs; i++)
373 exp1 = DEBUG_EvalExpr(exp->un.call.arg[i]);
374 if( exp1.type == NULL )
378 cexp[i] = DEBUG_GetExprValue(&exp1, NULL);
382 * Now look up the address of the function itself.
384 if( !DEBUG_GetSymbolValue(exp->un.call.funcname, -1, &rtn, FALSE ) )
386 RaiseException(DEBUG_STATUS_NO_SYMBOL, 0, 0, NULL);
390 /* FIXME: NEWDBG NIY */
391 /* Anyway, I wonder how this could work depending on the calling order of
392 * the function (cdecl vs pascal for example)
396 fptr = (int (*)()) rtn.addr.off;
397 switch(exp->un.call.nargs)
400 exp->un.call.result = (*fptr)();
403 exp->un.call.result = (*fptr)(cexp[0]);
406 exp->un.call.result = (*fptr)(cexp[0], cexp[1]);
409 exp->un.call.result = (*fptr)(cexp[0], cexp[1], cexp[2]);
412 exp->un.call.result = (*fptr)(cexp[0], cexp[1], cexp[2], cexp[3]);
415 exp->un.call.result = (*fptr)(cexp[0], cexp[1], cexp[2], cexp[3], cexp[4]);
419 DEBUG_Printf(DBG_CHN_MESG, "Function call no longer implemented\n");
420 /* would need to set up a call to this function, and then restore the current
421 * context afterwards...
423 exp->un.call.result = 0;
425 rtn.type = DEBUG_TypeInt;
426 rtn.cookie = DV_HOST;
427 rtn.addr.off = (unsigned int) &exp->un.call.result;
430 case EXPR_TYPE_INTVAR:
433 DBG_INTVAR* div = DEBUG_GetIntVar(exp->un.intvar.name);
435 if (!div) RaiseException(DEBUG_STATUS_NO_SYMBOL, 0, 0, NULL);
436 rtn.cookie = DV_HOST;
437 rtn.type = div->type;
438 rtn.addr.off = (unsigned int)div->pval;
439 /* EPP FIXME rtn.addr.seg = ?? */
442 case EXPR_TYPE_BINOP:
443 exp1 = DEBUG_EvalExpr(exp->un.binop.exp1);
444 exp2 = DEBUG_EvalExpr(exp->un.binop.exp2);
445 rtn.cookie = DV_HOST;
446 if( exp1.type == NULL || exp2.type == NULL )
448 RaiseException(DEBUG_STATUS_BAD_TYPE, 0, 0, NULL);
450 if( exp1.type == DEBUG_TypeIntConst && exp2.type == DEBUG_TypeIntConst )
452 rtn.type = exp1.type;
456 rtn.type = DEBUG_TypeInt;
459 rtn.addr.off = (unsigned int) &exp->un.binop.result;
460 switch(exp->un.binop.binop_type)
463 type1 = DEBUG_GetPointerType(exp1.type);
464 type2 = DEBUG_GetPointerType(exp2.type);
467 if( type1 != NULL && type2 != NULL )
469 RaiseException(DEBUG_STATUS_BAD_TYPE, 0, 0, NULL);
471 else if( type1 != NULL )
473 scale2 = DEBUG_GetObjectSize(type1);
474 rtn.type = exp1.type;
476 else if( type2 != NULL )
478 scale1 = DEBUG_GetObjectSize(type2);
479 rtn.type = exp2.type;
481 exp->un.binop.result = (VAL(exp1) * scale1 + scale2 * VAL(exp2));
484 type1 = DEBUG_GetPointerType(exp1.type);
485 type2 = DEBUG_GetPointerType(exp2.type);
489 if( type1 != NULL && type2 != NULL )
493 RaiseException(DEBUG_STATUS_BAD_TYPE, 0, 0, NULL);
495 scale3 = DEBUG_GetObjectSize(type1);
497 else if( type1 != NULL )
499 scale2 = DEBUG_GetObjectSize(type1);
500 rtn.type = exp1.type;
503 else if( type2 != NULL )
505 scale1 = DEBUG_GetObjectSize(type2);
506 rtn.type = exp2.type;
508 exp->un.binop.result = (VAL(exp1) - VAL(exp2)) / scale3;
511 rtn.cookie = DV_TARGET;
513 rtn.addr.seg = VAL(exp1);
514 rtn.addr.off = VAL(exp2);
517 exp->un.binop.result = (VAL(exp1) || VAL(exp2));
520 exp->un.binop.result = (VAL(exp1) && VAL(exp2));
523 exp->un.binop.result = (VAL(exp1) | VAL(exp2));
526 exp->un.binop.result = (VAL(exp1) & VAL(exp2));
529 exp->un.binop.result = (VAL(exp1) ^ VAL(exp2));
532 exp->un.binop.result = (VAL(exp1) == VAL(exp2));
535 exp->un.binop.result = (VAL(exp1) > VAL(exp2));
538 exp->un.binop.result = (VAL(exp1) < VAL(exp2));
541 exp->un.binop.result = (VAL(exp1) >= VAL(exp2));
544 exp->un.binop.result = (VAL(exp1) <= VAL(exp2));
547 exp->un.binop.result = (VAL(exp1) != VAL(exp2));
550 exp->un.binop.result = ((unsigned) VAL(exp1) << VAL(exp2));
553 exp->un.binop.result = ((unsigned) VAL(exp1) >> VAL(exp2));
556 exp->un.binop.result = (VAL(exp1) * VAL(exp2));
561 RaiseException(DEBUG_STATUS_DIV_BY_ZERO, 0, 0, NULL);
563 exp->un.binop.result = (VAL(exp1) / VAL(exp2));
568 RaiseException(DEBUG_STATUS_DIV_BY_ZERO, 0, 0, NULL);
570 exp->un.binop.result = (VAL(exp1) % VAL(exp2));
573 DEBUG_ArrayIndex(&exp1, &rtn, VAL(exp2));
576 RaiseException(DEBUG_STATUS_INTERNAL_ERROR, 0, 0, NULL);
581 exp1 = DEBUG_EvalExpr(exp->un.unop.exp1);
582 rtn.cookie = DV_HOST;
583 if( exp1.type == NULL )
585 RaiseException(DEBUG_STATUS_BAD_TYPE, 0, 0, NULL);
588 rtn.addr.off = (unsigned int) &exp->un.unop.result;
589 if( exp1.type == DEBUG_TypeIntConst )
591 rtn.type = exp1.type;
595 rtn.type = DEBUG_TypeInt;
597 switch(exp->un.unop.unop_type)
600 exp->un.unop.result = -VAL(exp1);
603 exp->un.unop.result = !VAL(exp1);
606 exp->un.unop.result = ~VAL(exp1);
609 /* FIXME: this is currently buggy.
610 * there is no way to tell were the deref:ed value is...
612 * x is a pointer to struct s, x being on the stack
613 * => exp1 is target, result is target
614 * x is a pointer to struct s, x being optimized into a reg
615 * => exp1 is host, result is target
616 * x is a pointer to internal variable x
617 * => exp1 is host, result is host
618 * so we force DV_TARGET, because dereferencing pointers to
619 * internal variables is very unlikely. a correct fix would be
622 rtn.cookie = DV_TARGET;
623 rtn.addr.off = (unsigned int) DEBUG_TypeDerefPointer(&exp1, &rtn.type);
626 RaiseException(DEBUG_STATUS_BAD_TYPE, 0, 0, NULL);
629 case EXP_OP_FORCE_DEREF:
630 rtn.cookie = exp1.cookie;
631 rtn.addr.seg = exp1.addr.seg;
632 if (exp1.cookie == DV_TARGET)
633 DEBUG_READ_MEM((void*)exp1.addr.off, &rtn.addr.off, sizeof(rtn.addr.off));
635 memcpy(&rtn.addr.off, (void*)exp1.addr.off, sizeof(rtn.addr.off));
638 /* FIXME: even for a 16 bit entity ? */
639 rtn.type = DEBUG_FindOrMakePointerType(exp1.type);
640 exp->un.unop.result = exp1.addr.off;
643 RaiseException(DEBUG_STATUS_INTERNAL_ERROR, 0, 0, NULL);
647 DEBUG_Printf(DBG_CHN_MESG,"Unexpected expression (%d).\n", exp->type);
648 RaiseException(DEBUG_STATUS_INTERNAL_ERROR, 0, 0, NULL);
652 assert(rtn.cookie == DV_TARGET || rtn.cookie == DV_HOST);
659 DEBUG_DisplayExpr(const struct expr * exp)
666 DEBUG_Printf(DBG_CHN_MESG, "((");
667 DEBUG_PrintTypeCast(exp->un.cast.cast);
668 DEBUG_Printf(DBG_CHN_MESG, ")");
669 DEBUG_DisplayExpr(exp->un.cast.expr);
670 DEBUG_Printf(DBG_CHN_MESG, ")");
672 case EXPR_TYPE_INTVAR:
673 DEBUG_Printf(DBG_CHN_MESG, "$%s", exp->un.intvar.name);
675 case EXPR_TYPE_US_CONST:
676 DEBUG_Printf(DBG_CHN_MESG, "%ud", exp->un.u_const.value);
678 case EXPR_TYPE_CONST:
679 DEBUG_Printf(DBG_CHN_MESG, "%d", exp->un.u_const.value);
681 case EXPR_TYPE_STRING:
682 DEBUG_Printf(DBG_CHN_MESG, "\"%s\"", exp->un.string.str);
684 case EXPR_TYPE_SYMBOL:
685 DEBUG_Printf(DBG_CHN_MESG, "%s" , exp->un.symbol.name);
687 case EXPR_TYPE_PSTRUCT:
688 DEBUG_DisplayExpr(exp->un.structure.exp1);
689 DEBUG_Printf(DBG_CHN_MESG, "->%s", exp->un.structure.element_name);
691 case EXPR_TYPE_STRUCT:
692 DEBUG_DisplayExpr(exp->un.structure.exp1);
693 DEBUG_Printf(DBG_CHN_MESG, ".%s", exp->un.structure.element_name);
696 DEBUG_Printf(DBG_CHN_MESG, "%s(",exp->un.call.funcname);
697 for(i=0; i < exp->un.call.nargs; i++)
699 DEBUG_DisplayExpr(exp->un.call.arg[i]);
700 if( i != exp->un.call.nargs - 1 )
702 DEBUG_Printf(DBG_CHN_MESG, ", ");
705 DEBUG_Printf(DBG_CHN_MESG, ")");
707 case EXPR_TYPE_BINOP:
708 DEBUG_Printf(DBG_CHN_MESG, "( ");
709 DEBUG_DisplayExpr(exp->un.binop.exp1);
710 switch(exp->un.binop.binop_type)
713 DEBUG_Printf(DBG_CHN_MESG, " + ");
716 DEBUG_Printf(DBG_CHN_MESG, " - ");
719 DEBUG_Printf(DBG_CHN_MESG, ":");
722 DEBUG_Printf(DBG_CHN_MESG, " || ");
725 DEBUG_Printf(DBG_CHN_MESG, " && ");
728 DEBUG_Printf(DBG_CHN_MESG, " | ");
731 DEBUG_Printf(DBG_CHN_MESG, " & ");
734 DEBUG_Printf(DBG_CHN_MESG, " ^ ");
737 DEBUG_Printf(DBG_CHN_MESG, " == ");
740 DEBUG_Printf(DBG_CHN_MESG, " > ");
743 DEBUG_Printf(DBG_CHN_MESG, " < ");
746 DEBUG_Printf(DBG_CHN_MESG, " >= ");
749 DEBUG_Printf(DBG_CHN_MESG, " <= ");
752 DEBUG_Printf(DBG_CHN_MESG, " != ");
755 DEBUG_Printf(DBG_CHN_MESG, " << ");
758 DEBUG_Printf(DBG_CHN_MESG, " >> ");
761 DEBUG_Printf(DBG_CHN_MESG, " * ");
764 DEBUG_Printf(DBG_CHN_MESG, " / ");
767 DEBUG_Printf(DBG_CHN_MESG, " %% ");
770 DEBUG_Printf(DBG_CHN_MESG, "[");
775 DEBUG_DisplayExpr(exp->un.binop.exp2);
776 if( exp->un.binop.binop_type == EXP_OP_ARR )
778 DEBUG_Printf(DBG_CHN_MESG, "]");
780 DEBUG_Printf(DBG_CHN_MESG, " )");
783 switch(exp->un.unop.unop_type)
786 DEBUG_Printf(DBG_CHN_MESG, "-");
789 DEBUG_Printf(DBG_CHN_MESG, "!");
792 DEBUG_Printf(DBG_CHN_MESG, "~");
795 DEBUG_Printf(DBG_CHN_MESG, "*");
798 DEBUG_Printf(DBG_CHN_MESG, "&");
801 DEBUG_DisplayExpr(exp->un.unop.exp1);
804 DEBUG_Printf(DBG_CHN_MESG,"Unexpected expression.\n");
805 RaiseException(DEBUG_STATUS_INTERNAL_ERROR, 0, 0, NULL);
813 DEBUG_CloneExpr(const struct expr * exp)
818 rtn = (struct expr *) DBG_alloc(sizeof(struct expr));
821 * First copy the contents of the expression itself.
829 rtn->un.cast.expr = DEBUG_CloneExpr(exp->un.cast.expr);
831 case EXPR_TYPE_INTVAR:
832 rtn->un.intvar.name = DBG_strdup(exp->un.intvar.name);
834 case EXPR_TYPE_US_CONST:
835 case EXPR_TYPE_CONST:
837 case EXPR_TYPE_STRING:
838 rtn->un.string.str = DBG_strdup(exp->un.string.str);
840 case EXPR_TYPE_SYMBOL:
841 rtn->un.symbol.name = DBG_strdup(exp->un.symbol.name);
843 case EXPR_TYPE_PSTRUCT:
844 case EXPR_TYPE_STRUCT:
845 rtn->un.structure.exp1 = DEBUG_CloneExpr(exp->un.structure.exp1);
846 rtn->un.structure.element_name = DBG_strdup(exp->un.structure.element_name);
849 for(i=0; i < exp->un.call.nargs; i++)
851 rtn->un.call.arg[i] = DEBUG_CloneExpr(exp->un.call.arg[i]);
853 rtn->un.call.funcname = DBG_strdup(exp->un.call.funcname);
855 case EXPR_TYPE_BINOP:
856 rtn->un.binop.exp1 = DEBUG_CloneExpr(exp->un.binop.exp1);
857 rtn->un.binop.exp2 = DEBUG_CloneExpr(exp->un.binop.exp2);
860 rtn->un.unop.exp1 = DEBUG_CloneExpr(exp->un.unop.exp1);
863 DEBUG_Printf(DBG_CHN_MESG,"Unexpected expression.\n");
864 RaiseException(DEBUG_STATUS_INTERNAL_ERROR, 0, 0, NULL);
873 * Recursively go through an expression tree and free all memory associated
877 DEBUG_FreeExpr(struct expr * exp)
884 DEBUG_FreeExpr(exp->un.cast.expr);
886 case EXPR_TYPE_INTVAR:
887 DBG_free((char *) exp->un.intvar.name);
889 case EXPR_TYPE_US_CONST:
890 case EXPR_TYPE_CONST:
892 case EXPR_TYPE_STRING:
893 DBG_free((char *) exp->un.string.str);
895 case EXPR_TYPE_SYMBOL:
896 DBG_free((char *) exp->un.symbol.name);
898 case EXPR_TYPE_PSTRUCT:
899 case EXPR_TYPE_STRUCT:
900 DEBUG_FreeExpr(exp->un.structure.exp1);
901 DBG_free((char *) exp->un.structure.element_name);
904 for(i=0; i < exp->un.call.nargs; i++)
906 DEBUG_FreeExpr(exp->un.call.arg[i]);
908 DBG_free((char *) exp->un.call.funcname);
910 case EXPR_TYPE_BINOP:
911 DEBUG_FreeExpr(exp->un.binop.exp1);
912 DEBUG_FreeExpr(exp->un.binop.exp2);
915 DEBUG_FreeExpr(exp->un.unop.exp1);
918 DEBUG_Printf(DBG_CHN_MESG,"Unexpected expression.\n");
919 RaiseException(DEBUG_STATUS_INTERNAL_ERROR, 0, 0, NULL);