2 * File expr.c - expression handling for Wine internal debugger.
4 * Copyright (C) 1997, Eric Youngdale.
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
25 #include "wine/winbase16.h"
79 struct datatype * cast;
86 const char * element_name;
98 const char * funcname;
101 struct expr * arg[5];
107 #define EXPR_TYPE_CONST 0
108 #define EXPR_TYPE_US_CONST 1
109 #define EXPR_TYPE_SYMBOL 2
110 #define EXPR_TYPE_INTVAR 3
111 #define EXPR_TYPE_BINOP 4
112 #define EXPR_TYPE_UNOP 5
113 #define EXPR_TYPE_STRUCT 6
114 #define EXPR_TYPE_PSTRUCT 7
115 #define EXPR_TYPE_ARRAY 8
116 #define EXPR_TYPE_CALL 9
117 #define EXPR_TYPE_STRING 10
118 #define EXPR_TYPE_CAST 11
120 static char expr_list[4096];
121 static unsigned int next_expr_free = 0;
124 * This is how we turn an expression address into the actual value.
125 * This works well in the 32 bit domain - not sure at all about the
128 #define VAL(_exp) DEBUG_GetExprValue(&_exp, NULL)
132 DEBUG_GetFreeExpr(void)
136 rtn = (struct expr *) &expr_list[next_expr_free];
138 next_expr_free += sizeof(struct expr);
139 assert(next_expr_free < sizeof(expr_list));
145 DEBUG_FreeExprMem(void)
151 DEBUG_TypeCastExpr(struct datatype * dt, struct expr * exp)
155 ex = DEBUG_GetFreeExpr();
157 ex->type = EXPR_TYPE_CAST;
158 ex->un.cast.cast = dt;
159 ex->un.cast.expr = exp;
164 DEBUG_IntVarExpr(const char* name)
168 ex = DEBUG_GetFreeExpr();
170 ex->type = EXPR_TYPE_INTVAR;
171 ex->un.intvar.name = name;
176 DEBUG_SymbolExpr(const char * name)
180 ex = DEBUG_GetFreeExpr();
182 ex->type = EXPR_TYPE_SYMBOL;
183 ex->un.symbol.name = name;
188 DEBUG_ConstExpr(int value)
192 ex = DEBUG_GetFreeExpr();
194 ex->type = EXPR_TYPE_CONST;
195 ex->un.constant.value = value;
200 DEBUG_StringExpr(const char * str)
204 ex = DEBUG_GetFreeExpr();
206 ex->type = EXPR_TYPE_STRING;
207 ex->un.string.str = str+1;
208 pnt = strrchr(ex->un.string.str, '"');
217 DEBUG_USConstExpr(unsigned int value)
221 ex = DEBUG_GetFreeExpr();
223 ex->type = EXPR_TYPE_CONST;
224 ex->un.u_const.value = value;
229 DEBUG_BinopExpr(int operator_type, struct expr * exp1, struct expr * exp2)
233 ex = DEBUG_GetFreeExpr();
235 ex->type = EXPR_TYPE_BINOP;
236 ex->un.binop.binop_type = operator_type;
237 ex->un.binop.exp1 = exp1;
238 ex->un.binop.exp2 = exp2;
243 DEBUG_UnopExpr(int operator_type, struct expr * exp1)
247 ex = DEBUG_GetFreeExpr();
249 ex->type = EXPR_TYPE_UNOP;
250 ex->un.unop.unop_type = operator_type;
251 ex->un.unop.exp1 = exp1;
256 DEBUG_StructExpr(struct expr * exp, const char * element)
260 ex = DEBUG_GetFreeExpr();
262 ex->type = EXPR_TYPE_STRUCT;
263 ex->un.structure.exp1 = exp;
264 ex->un.structure.element_name = element;
269 DEBUG_StructPExpr(struct expr * exp, const char * element)
273 ex = DEBUG_GetFreeExpr();
275 ex->type = EXPR_TYPE_PSTRUCT;
276 ex->un.structure.exp1 = exp;
277 ex->un.structure.element_name = element;
282 DEBUG_CallExpr(const char * funcname, int nargs, ...)
288 ex = DEBUG_GetFreeExpr();
290 ex->type = EXPR_TYPE_CALL;
291 ex->un.call.funcname = funcname;
292 ex->un.call.nargs = nargs;
295 for(i=0; i < nargs; i++)
297 ex->un.call.arg[i] = va_arg(ap, struct expr *);
303 DBG_VALUE DEBUG_EvalExpr(struct expr * exp)
309 unsigned int cexp[5];
313 struct datatype * type1;
314 struct datatype * type2;
317 rtn.cookie = DV_INVALID;
324 if (!exp->un.cast.cast)
326 DEBUG_Printf(DBG_CHN_MESG, "Can't cast to unknown type\n");
327 RaiseException(DEBUG_STATUS_BAD_TYPE, 0, 0, NULL);
329 rtn = DEBUG_EvalExpr(exp->un.cast.expr);
330 rtn.type = exp->un.cast.cast;
332 case EXPR_TYPE_STRING:
333 rtn.type = DEBUG_GetBasicType(DT_BASIC_STRING);
334 rtn.cookie = DV_HOST;
335 rtn.addr.off = (unsigned int) &exp->un.string.str;
338 case EXPR_TYPE_CONST:
339 rtn.type = DEBUG_GetBasicType(DT_BASIC_CONST_INT);
340 rtn.cookie = DV_HOST;
341 rtn.addr.off = (unsigned int) &exp->un.constant.value;
344 case EXPR_TYPE_US_CONST:
345 rtn.type = DEBUG_GetBasicType(DT_BASIC_USHORTINT);
346 rtn.cookie = DV_HOST;
347 rtn.addr.off = (unsigned int) &exp->un.u_const.value;
350 case EXPR_TYPE_SYMBOL:
351 switch (DEBUG_GetSymbolValue(exp->un.symbol.name, -1, &rtn, FALSE))
356 RaiseException(DEBUG_STATUS_NO_SYMBOL, 0, 0, NULL);
357 /* should never be here */
359 RaiseException(DEBUG_STATUS_ABORT, 0, 0, NULL);
360 /* should never be here */
363 case EXPR_TYPE_PSTRUCT:
364 exp1 = DEBUG_EvalExpr(exp->un.structure.exp1);
365 if( exp1.type == NULL )
367 RaiseException(DEBUG_STATUS_BAD_TYPE, 0, 0, NULL);
369 rtn.cookie = DV_TARGET;
370 rtn.addr.off = DEBUG_TypeDerefPointer(&exp1, &rtn.type);
371 if( rtn.type == NULL )
373 RaiseException(DEBUG_STATUS_BAD_TYPE, 0, 0, NULL);
375 if (!DEBUG_FindStructElement(&rtn, exp->un.structure.element_name,
376 &exp->un.structure.result))
378 DEBUG_Printf(DBG_CHN_MESG, "%s\n", exp->un.structure.element_name);
379 RaiseException(DEBUG_STATUS_NO_FIELD, 0, 0, NULL);
383 case EXPR_TYPE_STRUCT:
384 exp1 = DEBUG_EvalExpr(exp->un.structure.exp1);
385 if( exp1.type == NULL )
387 RaiseException(DEBUG_STATUS_BAD_TYPE, 0, 0, NULL);
390 if (!DEBUG_FindStructElement(&rtn, exp->un.structure.element_name,
391 &exp->un.structure.result))
393 DEBUG_Printf(DBG_CHN_MESG, "%s\n", exp->un.structure.element_name);
394 RaiseException(DEBUG_STATUS_NO_FIELD, 0, 0, NULL);
399 * First, evaluate all of the arguments. If any of them are not
400 * evaluable, then bail.
402 for(i=0; i < exp->un.call.nargs; i++)
404 exp1 = DEBUG_EvalExpr(exp->un.call.arg[i]);
405 if( exp1.type == NULL )
409 cexp[i] = DEBUG_GetExprValue(&exp1, NULL);
413 * Now look up the address of the function itself.
415 switch (DEBUG_GetSymbolValue(exp->un.call.funcname, -1, &rtn, FALSE ))
420 RaiseException(DEBUG_STATUS_NO_SYMBOL, 0, 0, NULL);
421 /* should never be here */
423 RaiseException(DEBUG_STATUS_ABORT, 0, 0, NULL);
424 /* should never be here */
428 /* FIXME: NEWDBG NIY */
429 /* Anyway, I wonder how this could work depending on the calling order of
430 * the function (cdecl vs pascal for example)
434 fptr = (int (*)()) rtn.addr.off;
435 switch(exp->un.call.nargs)
438 exp->un.call.result = (*fptr)();
441 exp->un.call.result = (*fptr)(cexp[0]);
444 exp->un.call.result = (*fptr)(cexp[0], cexp[1]);
447 exp->un.call.result = (*fptr)(cexp[0], cexp[1], cexp[2]);
450 exp->un.call.result = (*fptr)(cexp[0], cexp[1], cexp[2], cexp[3]);
453 exp->un.call.result = (*fptr)(cexp[0], cexp[1], cexp[2], cexp[3], cexp[4]);
457 DEBUG_Printf(DBG_CHN_MESG, "Function call no longer implemented\n");
458 /* would need to set up a call to this function, and then restore the current
459 * context afterwards...
461 exp->un.call.result = 0;
463 rtn.type = DEBUG_GetBasicType(DT_BASIC_INT);
464 rtn.cookie = DV_HOST;
465 rtn.addr.off = (unsigned int) &exp->un.call.result;
468 case EXPR_TYPE_INTVAR:
471 DBG_INTVAR* div = DEBUG_GetIntVar(exp->un.intvar.name);
473 if (!div) RaiseException(DEBUG_STATUS_NO_SYMBOL, 0, 0, NULL);
474 rtn.cookie = DV_HOST;
475 rtn.type = div->type;
476 rtn.addr.off = (unsigned int)div->pval;
477 /* EPP FIXME rtn.addr.seg = ?? */
480 case EXPR_TYPE_BINOP:
481 exp1 = DEBUG_EvalExpr(exp->un.binop.exp1);
482 exp2 = DEBUG_EvalExpr(exp->un.binop.exp2);
483 rtn.cookie = DV_HOST;
484 if( exp1.type == NULL || exp2.type == NULL )
486 RaiseException(DEBUG_STATUS_BAD_TYPE, 0, 0, NULL);
488 if( exp1.type == DEBUG_GetBasicType(DT_BASIC_CONST_INT) &&
489 exp2.type == DEBUG_GetBasicType(DT_BASIC_CONST_INT) )
491 rtn.type = exp1.type;
495 rtn.type = DEBUG_GetBasicType(DT_BASIC_INT);
498 rtn.addr.off = (unsigned int) &exp->un.binop.result;
499 switch(exp->un.binop.binop_type)
502 type1 = DEBUG_GetPointerType(exp1.type);
503 type2 = DEBUG_GetPointerType(exp2.type);
506 if( type1 != NULL && type2 != NULL )
508 RaiseException(DEBUG_STATUS_BAD_TYPE, 0, 0, NULL);
510 else if( type1 != NULL )
512 scale2 = DEBUG_GetObjectSize(type1);
513 rtn.type = exp1.type;
515 else if( type2 != NULL )
517 scale1 = DEBUG_GetObjectSize(type2);
518 rtn.type = exp2.type;
520 exp->un.binop.result = (VAL(exp1) * scale1 + scale2 * VAL(exp2));
523 type1 = DEBUG_GetPointerType(exp1.type);
524 type2 = DEBUG_GetPointerType(exp2.type);
528 if( type1 != NULL && type2 != NULL )
532 RaiseException(DEBUG_STATUS_BAD_TYPE, 0, 0, NULL);
534 scale3 = DEBUG_GetObjectSize(type1);
536 else if( type1 != NULL )
538 scale2 = DEBUG_GetObjectSize(type1);
539 rtn.type = exp1.type;
542 else if( type2 != NULL )
544 scale1 = DEBUG_GetObjectSize(type2);
545 rtn.type = exp2.type;
547 exp->un.binop.result = (VAL(exp1) - VAL(exp2)) / scale3;
550 rtn.cookie = DV_TARGET;
552 rtn.addr.seg = VAL(exp1);
553 rtn.addr.off = VAL(exp2);
556 exp->un.binop.result = (VAL(exp1) || VAL(exp2));
559 exp->un.binop.result = (VAL(exp1) && VAL(exp2));
562 exp->un.binop.result = (VAL(exp1) | VAL(exp2));
565 exp->un.binop.result = (VAL(exp1) & VAL(exp2));
568 exp->un.binop.result = (VAL(exp1) ^ VAL(exp2));
571 exp->un.binop.result = (VAL(exp1) == VAL(exp2));
574 exp->un.binop.result = (VAL(exp1) > VAL(exp2));
577 exp->un.binop.result = (VAL(exp1) < VAL(exp2));
580 exp->un.binop.result = (VAL(exp1) >= VAL(exp2));
583 exp->un.binop.result = (VAL(exp1) <= VAL(exp2));
586 exp->un.binop.result = (VAL(exp1) != VAL(exp2));
589 exp->un.binop.result = ((unsigned) VAL(exp1) << VAL(exp2));
592 exp->un.binop.result = ((unsigned) VAL(exp1) >> VAL(exp2));
595 exp->un.binop.result = (VAL(exp1) * VAL(exp2));
600 RaiseException(DEBUG_STATUS_DIV_BY_ZERO, 0, 0, NULL);
602 exp->un.binop.result = (VAL(exp1) / VAL(exp2));
607 RaiseException(DEBUG_STATUS_DIV_BY_ZERO, 0, 0, NULL);
609 exp->un.binop.result = (VAL(exp1) % VAL(exp2));
612 DEBUG_ArrayIndex(&exp1, &rtn, VAL(exp2));
615 RaiseException(DEBUG_STATUS_INTERNAL_ERROR, 0, 0, NULL);
620 exp1 = DEBUG_EvalExpr(exp->un.unop.exp1);
621 rtn.cookie = DV_HOST;
622 if( exp1.type == NULL )
624 RaiseException(DEBUG_STATUS_BAD_TYPE, 0, 0, NULL);
627 rtn.addr.off = (unsigned int) &exp->un.unop.result;
628 if( exp1.type == DEBUG_GetBasicType(DT_BASIC_CONST_INT) )
630 rtn.type = exp1.type;
634 rtn.type = DEBUG_GetBasicType(DT_BASIC_INT);
636 switch(exp->un.unop.unop_type)
639 exp->un.unop.result = -VAL(exp1);
642 exp->un.unop.result = !VAL(exp1);
645 exp->un.unop.result = ~VAL(exp1);
648 /* FIXME: this is currently buggy.
649 * there is no way to tell were the deref:ed value is...
651 * x is a pointer to struct s, x being on the stack
652 * => exp1 is target, result is target
653 * x is a pointer to struct s, x being optimized into a reg
654 * => exp1 is host, result is target
655 * x is a pointer to internal variable x
656 * => exp1 is host, result is host
657 * so we force DV_TARGET, because dereferencing pointers to
658 * internal variables is very unlikely. a correct fix would be
661 rtn.cookie = DV_TARGET;
662 rtn.addr.off = (unsigned int) DEBUG_TypeDerefPointer(&exp1, &rtn.type);
665 RaiseException(DEBUG_STATUS_BAD_TYPE, 0, 0, NULL);
668 case EXP_OP_FORCE_DEREF:
669 rtn.cookie = exp1.cookie;
670 rtn.addr.seg = exp1.addr.seg;
671 if (exp1.cookie == DV_TARGET)
672 DEBUG_READ_MEM((void*)exp1.addr.off, &rtn.addr.off, sizeof(rtn.addr.off));
674 memcpy(&rtn.addr.off, (void*)exp1.addr.off, sizeof(rtn.addr.off));
677 /* FIXME: even for a 16 bit entity ? */
678 rtn.type = DEBUG_FindOrMakePointerType(exp1.type);
679 exp->un.unop.result = exp1.addr.off;
682 RaiseException(DEBUG_STATUS_INTERNAL_ERROR, 0, 0, NULL);
686 DEBUG_Printf(DBG_CHN_MESG,"Unexpected expression (%d).\n", exp->type);
687 RaiseException(DEBUG_STATUS_INTERNAL_ERROR, 0, 0, NULL);
691 assert(rtn.cookie == DV_TARGET || rtn.cookie == DV_HOST);
698 DEBUG_DisplayExpr(const struct expr * exp)
705 DEBUG_Printf(DBG_CHN_MESG, "((");
706 DEBUG_PrintTypeCast(exp->un.cast.cast);
707 DEBUG_Printf(DBG_CHN_MESG, ")");
708 DEBUG_DisplayExpr(exp->un.cast.expr);
709 DEBUG_Printf(DBG_CHN_MESG, ")");
711 case EXPR_TYPE_INTVAR:
712 DEBUG_Printf(DBG_CHN_MESG, "$%s", exp->un.intvar.name);
714 case EXPR_TYPE_US_CONST:
715 DEBUG_Printf(DBG_CHN_MESG, "%ud", exp->un.u_const.value);
717 case EXPR_TYPE_CONST:
718 DEBUG_Printf(DBG_CHN_MESG, "%d", exp->un.u_const.value);
720 case EXPR_TYPE_STRING:
721 DEBUG_Printf(DBG_CHN_MESG, "\"%s\"", exp->un.string.str);
723 case EXPR_TYPE_SYMBOL:
724 DEBUG_Printf(DBG_CHN_MESG, "%s" , exp->un.symbol.name);
726 case EXPR_TYPE_PSTRUCT:
727 DEBUG_DisplayExpr(exp->un.structure.exp1);
728 DEBUG_Printf(DBG_CHN_MESG, "->%s", exp->un.structure.element_name);
730 case EXPR_TYPE_STRUCT:
731 DEBUG_DisplayExpr(exp->un.structure.exp1);
732 DEBUG_Printf(DBG_CHN_MESG, ".%s", exp->un.structure.element_name);
735 DEBUG_Printf(DBG_CHN_MESG, "%s(",exp->un.call.funcname);
736 for(i=0; i < exp->un.call.nargs; i++)
738 DEBUG_DisplayExpr(exp->un.call.arg[i]);
739 if( i != exp->un.call.nargs - 1 )
741 DEBUG_Printf(DBG_CHN_MESG, ", ");
744 DEBUG_Printf(DBG_CHN_MESG, ")");
746 case EXPR_TYPE_BINOP:
747 DEBUG_Printf(DBG_CHN_MESG, "( ");
748 DEBUG_DisplayExpr(exp->un.binop.exp1);
749 switch(exp->un.binop.binop_type)
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, " & ");
773 DEBUG_Printf(DBG_CHN_MESG, " ^ ");
776 DEBUG_Printf(DBG_CHN_MESG, " == ");
779 DEBUG_Printf(DBG_CHN_MESG, " > ");
782 DEBUG_Printf(DBG_CHN_MESG, " < ");
785 DEBUG_Printf(DBG_CHN_MESG, " >= ");
788 DEBUG_Printf(DBG_CHN_MESG, " <= ");
791 DEBUG_Printf(DBG_CHN_MESG, " != ");
794 DEBUG_Printf(DBG_CHN_MESG, " << ");
797 DEBUG_Printf(DBG_CHN_MESG, " >> ");
800 DEBUG_Printf(DBG_CHN_MESG, " * ");
803 DEBUG_Printf(DBG_CHN_MESG, " / ");
806 DEBUG_Printf(DBG_CHN_MESG, " %% ");
809 DEBUG_Printf(DBG_CHN_MESG, "[");
814 DEBUG_DisplayExpr(exp->un.binop.exp2);
815 if( exp->un.binop.binop_type == EXP_OP_ARR )
817 DEBUG_Printf(DBG_CHN_MESG, "]");
819 DEBUG_Printf(DBG_CHN_MESG, " )");
822 switch(exp->un.unop.unop_type)
825 DEBUG_Printf(DBG_CHN_MESG, "-");
828 DEBUG_Printf(DBG_CHN_MESG, "!");
831 DEBUG_Printf(DBG_CHN_MESG, "~");
834 DEBUG_Printf(DBG_CHN_MESG, "*");
837 DEBUG_Printf(DBG_CHN_MESG, "&");
840 DEBUG_DisplayExpr(exp->un.unop.exp1);
843 DEBUG_Printf(DBG_CHN_MESG,"Unexpected expression.\n");
844 RaiseException(DEBUG_STATUS_INTERNAL_ERROR, 0, 0, NULL);
852 DEBUG_CloneExpr(const struct expr * exp)
857 rtn = (struct expr *) DBG_alloc(sizeof(struct expr));
860 * First copy the contents of the expression itself.
868 rtn->un.cast.expr = DEBUG_CloneExpr(exp->un.cast.expr);
870 case EXPR_TYPE_INTVAR:
871 rtn->un.intvar.name = DBG_strdup(exp->un.intvar.name);
873 case EXPR_TYPE_US_CONST:
874 case EXPR_TYPE_CONST:
876 case EXPR_TYPE_STRING:
877 rtn->un.string.str = DBG_strdup(exp->un.string.str);
879 case EXPR_TYPE_SYMBOL:
880 rtn->un.symbol.name = DBG_strdup(exp->un.symbol.name);
882 case EXPR_TYPE_PSTRUCT:
883 case EXPR_TYPE_STRUCT:
884 rtn->un.structure.exp1 = DEBUG_CloneExpr(exp->un.structure.exp1);
885 rtn->un.structure.element_name = DBG_strdup(exp->un.structure.element_name);
888 for(i=0; i < exp->un.call.nargs; i++)
890 rtn->un.call.arg[i] = DEBUG_CloneExpr(exp->un.call.arg[i]);
892 rtn->un.call.funcname = DBG_strdup(exp->un.call.funcname);
894 case EXPR_TYPE_BINOP:
895 rtn->un.binop.exp1 = DEBUG_CloneExpr(exp->un.binop.exp1);
896 rtn->un.binop.exp2 = DEBUG_CloneExpr(exp->un.binop.exp2);
899 rtn->un.unop.exp1 = DEBUG_CloneExpr(exp->un.unop.exp1);
902 DEBUG_Printf(DBG_CHN_MESG,"Unexpected expression.\n");
903 RaiseException(DEBUG_STATUS_INTERNAL_ERROR, 0, 0, NULL);
912 * Recursively go through an expression tree and free all memory associated
916 DEBUG_FreeExpr(struct expr * exp)
923 DEBUG_FreeExpr(exp->un.cast.expr);
925 case EXPR_TYPE_INTVAR:
926 DBG_free((char *) exp->un.intvar.name);
928 case EXPR_TYPE_US_CONST:
929 case EXPR_TYPE_CONST:
931 case EXPR_TYPE_STRING:
932 DBG_free((char *) exp->un.string.str);
934 case EXPR_TYPE_SYMBOL:
935 DBG_free((char *) exp->un.symbol.name);
937 case EXPR_TYPE_PSTRUCT:
938 case EXPR_TYPE_STRUCT:
939 DEBUG_FreeExpr(exp->un.structure.exp1);
940 DBG_free((char *) exp->un.structure.element_name);
943 for(i=0; i < exp->un.call.nargs; i++)
945 DEBUG_FreeExpr(exp->un.call.arg[i]);
947 DBG_free((char *) exp->un.call.funcname);
949 case EXPR_TYPE_BINOP:
950 DEBUG_FreeExpr(exp->un.binop.exp1);
951 DEBUG_FreeExpr(exp->un.binop.exp2);
954 DEBUG_FreeExpr(exp->un.unop.exp1);
957 DEBUG_Printf(DBG_CHN_MESG,"Unexpected expression.\n");
958 RaiseException(DEBUG_STATUS_INTERNAL_ERROR, 0, 0, NULL);