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 rtn = DEBUG_EvalExpr(exp->un.cast.expr);
325 rtn.type = exp->un.cast.cast;
328 DEBUG_Printf(DBG_CHN_MESG, "Can't cast to unknown type\n");
329 RaiseException(DEBUG_STATUS_BAD_TYPE, 0, 0, NULL);
331 if (DEBUG_GetType(rtn.type) == DT_POINTER)
332 rtn.cookie = DV_TARGET;
334 case EXPR_TYPE_STRING:
335 rtn.type = DEBUG_GetBasicType(DT_BASIC_STRING);
336 rtn.cookie = DV_HOST;
337 rtn.addr.off = (unsigned int) &exp->un.string.str;
340 case EXPR_TYPE_CONST:
341 rtn.type = DEBUG_GetBasicType(DT_BASIC_CONST_INT);
342 rtn.cookie = DV_HOST;
343 rtn.addr.off = (unsigned int) &exp->un.constant.value;
346 case EXPR_TYPE_US_CONST:
347 rtn.type = DEBUG_GetBasicType(DT_BASIC_USHORTINT);
348 rtn.cookie = DV_HOST;
349 rtn.addr.off = (unsigned int) &exp->un.u_const.value;
352 case EXPR_TYPE_SYMBOL:
353 if( !DEBUG_GetSymbolValue(exp->un.symbol.name, -1, &rtn, FALSE) )
355 DEBUG_Printf(DBG_CHN_MESG, "%s\n", exp->un.symbol.name);
356 RaiseException(DEBUG_STATUS_NO_SYMBOL, 0, 0, NULL);
359 case EXPR_TYPE_PSTRUCT:
360 exp1 = DEBUG_EvalExpr(exp->un.structure.exp1);
361 if( exp1.type == NULL )
363 RaiseException(DEBUG_STATUS_BAD_TYPE, 0, 0, NULL);
365 rtn.cookie = DV_TARGET;
366 rtn.addr.off = DEBUG_TypeDerefPointer(&exp1, &rtn.type);
367 if( rtn.type == NULL )
369 RaiseException(DEBUG_STATUS_BAD_TYPE, 0, 0, NULL);
371 if (!DEBUG_FindStructElement(&rtn, exp->un.structure.element_name,
372 &exp->un.structure.result))
374 DEBUG_Printf(DBG_CHN_MESG, "%s\n", exp->un.structure.element_name);
375 RaiseException(DEBUG_STATUS_NO_FIELD, 0, 0, NULL);
379 case EXPR_TYPE_STRUCT:
380 exp1 = DEBUG_EvalExpr(exp->un.structure.exp1);
381 if( exp1.type == NULL )
383 RaiseException(DEBUG_STATUS_BAD_TYPE, 0, 0, NULL);
386 if (!DEBUG_FindStructElement(&rtn, exp->un.structure.element_name,
387 &exp->un.structure.result))
389 DEBUG_Printf(DBG_CHN_MESG, "%s\n", exp->un.structure.element_name);
390 RaiseException(DEBUG_STATUS_NO_FIELD, 0, 0, NULL);
395 * First, evaluate all of the arguments. If any of them are not
396 * evaluable, then bail.
398 for(i=0; i < exp->un.call.nargs; i++)
400 exp1 = DEBUG_EvalExpr(exp->un.call.arg[i]);
401 if( exp1.type == NULL )
405 cexp[i] = DEBUG_GetExprValue(&exp1, NULL);
409 * Now look up the address of the function itself.
411 if( !DEBUG_GetSymbolValue(exp->un.call.funcname, -1, &rtn, FALSE ) )
413 RaiseException(DEBUG_STATUS_NO_SYMBOL, 0, 0, NULL);
417 /* FIXME: NEWDBG NIY */
418 /* Anyway, I wonder how this could work depending on the calling order of
419 * the function (cdecl vs pascal for example)
423 fptr = (int (*)()) rtn.addr.off;
424 switch(exp->un.call.nargs)
427 exp->un.call.result = (*fptr)();
430 exp->un.call.result = (*fptr)(cexp[0]);
433 exp->un.call.result = (*fptr)(cexp[0], cexp[1]);
436 exp->un.call.result = (*fptr)(cexp[0], cexp[1], cexp[2]);
439 exp->un.call.result = (*fptr)(cexp[0], cexp[1], cexp[2], cexp[3]);
442 exp->un.call.result = (*fptr)(cexp[0], cexp[1], cexp[2], cexp[3], cexp[4]);
446 DEBUG_Printf(DBG_CHN_MESG, "Function call no longer implemented\n");
447 /* would need to set up a call to this function, and then restore the current
448 * context afterwards...
450 exp->un.call.result = 0;
452 rtn.type = DEBUG_GetBasicType(DT_BASIC_INT);
453 rtn.cookie = DV_HOST;
454 rtn.addr.off = (unsigned int) &exp->un.call.result;
457 case EXPR_TYPE_INTVAR:
460 DBG_INTVAR* div = DEBUG_GetIntVar(exp->un.intvar.name);
462 if (!div) RaiseException(DEBUG_STATUS_NO_SYMBOL, 0, 0, NULL);
463 rtn.cookie = DV_HOST;
464 rtn.type = div->type;
465 rtn.addr.off = (unsigned int)div->pval;
466 /* EPP FIXME rtn.addr.seg = ?? */
469 case EXPR_TYPE_BINOP:
470 exp1 = DEBUG_EvalExpr(exp->un.binop.exp1);
471 exp2 = DEBUG_EvalExpr(exp->un.binop.exp2);
472 rtn.cookie = DV_HOST;
473 if( exp1.type == NULL || exp2.type == NULL )
475 RaiseException(DEBUG_STATUS_BAD_TYPE, 0, 0, NULL);
477 if( exp1.type == DEBUG_GetBasicType(DT_BASIC_CONST_INT) &&
478 exp2.type == DEBUG_GetBasicType(DT_BASIC_CONST_INT) )
480 rtn.type = exp1.type;
484 rtn.type = DEBUG_GetBasicType(DT_BASIC_INT);
487 rtn.addr.off = (unsigned int) &exp->un.binop.result;
488 switch(exp->un.binop.binop_type)
491 type1 = DEBUG_GetPointerType(exp1.type);
492 type2 = DEBUG_GetPointerType(exp2.type);
495 if( type1 != NULL && type2 != NULL )
497 RaiseException(DEBUG_STATUS_BAD_TYPE, 0, 0, NULL);
499 else if( type1 != NULL )
501 scale2 = DEBUG_GetObjectSize(type1);
502 rtn.type = exp1.type;
504 else if( type2 != NULL )
506 scale1 = DEBUG_GetObjectSize(type2);
507 rtn.type = exp2.type;
509 exp->un.binop.result = (VAL(exp1) * scale1 + scale2 * VAL(exp2));
512 type1 = DEBUG_GetPointerType(exp1.type);
513 type2 = DEBUG_GetPointerType(exp2.type);
517 if( type1 != NULL && type2 != NULL )
521 RaiseException(DEBUG_STATUS_BAD_TYPE, 0, 0, NULL);
523 scale3 = DEBUG_GetObjectSize(type1);
525 else if( type1 != NULL )
527 scale2 = DEBUG_GetObjectSize(type1);
528 rtn.type = exp1.type;
531 else if( type2 != NULL )
533 scale1 = DEBUG_GetObjectSize(type2);
534 rtn.type = exp2.type;
536 exp->un.binop.result = (VAL(exp1) - VAL(exp2)) / scale3;
539 rtn.cookie = DV_TARGET;
541 rtn.addr.seg = VAL(exp1);
542 rtn.addr.off = VAL(exp2);
545 exp->un.binop.result = (VAL(exp1) || VAL(exp2));
548 exp->un.binop.result = (VAL(exp1) && VAL(exp2));
551 exp->un.binop.result = (VAL(exp1) | VAL(exp2));
554 exp->un.binop.result = (VAL(exp1) & VAL(exp2));
557 exp->un.binop.result = (VAL(exp1) ^ VAL(exp2));
560 exp->un.binop.result = (VAL(exp1) == VAL(exp2));
563 exp->un.binop.result = (VAL(exp1) > VAL(exp2));
566 exp->un.binop.result = (VAL(exp1) < VAL(exp2));
569 exp->un.binop.result = (VAL(exp1) >= VAL(exp2));
572 exp->un.binop.result = (VAL(exp1) <= VAL(exp2));
575 exp->un.binop.result = (VAL(exp1) != VAL(exp2));
578 exp->un.binop.result = ((unsigned) VAL(exp1) << VAL(exp2));
581 exp->un.binop.result = ((unsigned) VAL(exp1) >> VAL(exp2));
584 exp->un.binop.result = (VAL(exp1) * VAL(exp2));
589 RaiseException(DEBUG_STATUS_DIV_BY_ZERO, 0, 0, NULL);
591 exp->un.binop.result = (VAL(exp1) / VAL(exp2));
596 RaiseException(DEBUG_STATUS_DIV_BY_ZERO, 0, 0, NULL);
598 exp->un.binop.result = (VAL(exp1) % VAL(exp2));
601 DEBUG_ArrayIndex(&exp1, &rtn, VAL(exp2));
604 RaiseException(DEBUG_STATUS_INTERNAL_ERROR, 0, 0, NULL);
609 exp1 = DEBUG_EvalExpr(exp->un.unop.exp1);
610 rtn.cookie = DV_HOST;
611 if( exp1.type == NULL )
613 RaiseException(DEBUG_STATUS_BAD_TYPE, 0, 0, NULL);
616 rtn.addr.off = (unsigned int) &exp->un.unop.result;
617 if( exp1.type == DEBUG_GetBasicType(DT_BASIC_CONST_INT) )
619 rtn.type = exp1.type;
623 rtn.type = DEBUG_GetBasicType(DT_BASIC_INT);
625 switch(exp->un.unop.unop_type)
628 exp->un.unop.result = -VAL(exp1);
631 exp->un.unop.result = !VAL(exp1);
634 exp->un.unop.result = ~VAL(exp1);
637 /* FIXME: this is currently buggy.
638 * there is no way to tell were the deref:ed value is...
640 * x is a pointer to struct s, x being on the stack
641 * => exp1 is target, result is target
642 * x is a pointer to struct s, x being optimized into a reg
643 * => exp1 is host, result is target
644 * x is a pointer to internal variable x
645 * => exp1 is host, result is host
646 * so we force DV_TARGET, because dereferencing pointers to
647 * internal variables is very unlikely. a correct fix would be
650 rtn.cookie = DV_TARGET;
651 rtn.addr.off = (unsigned int) DEBUG_TypeDerefPointer(&exp1, &rtn.type);
654 RaiseException(DEBUG_STATUS_BAD_TYPE, 0, 0, NULL);
657 case EXP_OP_FORCE_DEREF:
658 rtn.cookie = exp1.cookie;
659 rtn.addr.seg = exp1.addr.seg;
660 if (exp1.cookie == DV_TARGET)
661 DEBUG_READ_MEM((void*)exp1.addr.off, &rtn.addr.off, sizeof(rtn.addr.off));
663 memcpy(&rtn.addr.off, (void*)exp1.addr.off, sizeof(rtn.addr.off));
666 /* FIXME: even for a 16 bit entity ? */
667 rtn.type = DEBUG_FindOrMakePointerType(exp1.type);
668 exp->un.unop.result = exp1.addr.off;
671 RaiseException(DEBUG_STATUS_INTERNAL_ERROR, 0, 0, NULL);
675 DEBUG_Printf(DBG_CHN_MESG,"Unexpected expression (%d).\n", exp->type);
676 RaiseException(DEBUG_STATUS_INTERNAL_ERROR, 0, 0, NULL);
680 assert(rtn.cookie == DV_TARGET || rtn.cookie == DV_HOST);
687 DEBUG_DisplayExpr(const struct expr * exp)
694 DEBUG_Printf(DBG_CHN_MESG, "((");
695 DEBUG_PrintTypeCast(exp->un.cast.cast);
696 DEBUG_Printf(DBG_CHN_MESG, ")");
697 DEBUG_DisplayExpr(exp->un.cast.expr);
698 DEBUG_Printf(DBG_CHN_MESG, ")");
700 case EXPR_TYPE_INTVAR:
701 DEBUG_Printf(DBG_CHN_MESG, "$%s", exp->un.intvar.name);
703 case EXPR_TYPE_US_CONST:
704 DEBUG_Printf(DBG_CHN_MESG, "%ud", exp->un.u_const.value);
706 case EXPR_TYPE_CONST:
707 DEBUG_Printf(DBG_CHN_MESG, "%d", exp->un.u_const.value);
709 case EXPR_TYPE_STRING:
710 DEBUG_Printf(DBG_CHN_MESG, "\"%s\"", exp->un.string.str);
712 case EXPR_TYPE_SYMBOL:
713 DEBUG_Printf(DBG_CHN_MESG, "%s" , exp->un.symbol.name);
715 case EXPR_TYPE_PSTRUCT:
716 DEBUG_DisplayExpr(exp->un.structure.exp1);
717 DEBUG_Printf(DBG_CHN_MESG, "->%s", exp->un.structure.element_name);
719 case EXPR_TYPE_STRUCT:
720 DEBUG_DisplayExpr(exp->un.structure.exp1);
721 DEBUG_Printf(DBG_CHN_MESG, ".%s", exp->un.structure.element_name);
724 DEBUG_Printf(DBG_CHN_MESG, "%s(",exp->un.call.funcname);
725 for(i=0; i < exp->un.call.nargs; i++)
727 DEBUG_DisplayExpr(exp->un.call.arg[i]);
728 if( i != exp->un.call.nargs - 1 )
730 DEBUG_Printf(DBG_CHN_MESG, ", ");
733 DEBUG_Printf(DBG_CHN_MESG, ")");
735 case EXPR_TYPE_BINOP:
736 DEBUG_Printf(DBG_CHN_MESG, "( ");
737 DEBUG_DisplayExpr(exp->un.binop.exp1);
738 switch(exp->un.binop.binop_type)
741 DEBUG_Printf(DBG_CHN_MESG, " + ");
744 DEBUG_Printf(DBG_CHN_MESG, " - ");
747 DEBUG_Printf(DBG_CHN_MESG, ":");
750 DEBUG_Printf(DBG_CHN_MESG, " || ");
753 DEBUG_Printf(DBG_CHN_MESG, " && ");
756 DEBUG_Printf(DBG_CHN_MESG, " | ");
759 DEBUG_Printf(DBG_CHN_MESG, " & ");
762 DEBUG_Printf(DBG_CHN_MESG, " ^ ");
765 DEBUG_Printf(DBG_CHN_MESG, " == ");
768 DEBUG_Printf(DBG_CHN_MESG, " > ");
771 DEBUG_Printf(DBG_CHN_MESG, " < ");
774 DEBUG_Printf(DBG_CHN_MESG, " >= ");
777 DEBUG_Printf(DBG_CHN_MESG, " <= ");
780 DEBUG_Printf(DBG_CHN_MESG, " != ");
783 DEBUG_Printf(DBG_CHN_MESG, " << ");
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, "[");
803 DEBUG_DisplayExpr(exp->un.binop.exp2);
804 if( exp->un.binop.binop_type == EXP_OP_ARR )
806 DEBUG_Printf(DBG_CHN_MESG, "]");
808 DEBUG_Printf(DBG_CHN_MESG, " )");
811 switch(exp->un.unop.unop_type)
814 DEBUG_Printf(DBG_CHN_MESG, "-");
817 DEBUG_Printf(DBG_CHN_MESG, "!");
820 DEBUG_Printf(DBG_CHN_MESG, "~");
823 DEBUG_Printf(DBG_CHN_MESG, "*");
826 DEBUG_Printf(DBG_CHN_MESG, "&");
829 DEBUG_DisplayExpr(exp->un.unop.exp1);
832 DEBUG_Printf(DBG_CHN_MESG,"Unexpected expression.\n");
833 RaiseException(DEBUG_STATUS_INTERNAL_ERROR, 0, 0, NULL);
841 DEBUG_CloneExpr(const struct expr * exp)
846 rtn = (struct expr *) DBG_alloc(sizeof(struct expr));
849 * First copy the contents of the expression itself.
857 rtn->un.cast.expr = DEBUG_CloneExpr(exp->un.cast.expr);
859 case EXPR_TYPE_INTVAR:
860 rtn->un.intvar.name = DBG_strdup(exp->un.intvar.name);
862 case EXPR_TYPE_US_CONST:
863 case EXPR_TYPE_CONST:
865 case EXPR_TYPE_STRING:
866 rtn->un.string.str = DBG_strdup(exp->un.string.str);
868 case EXPR_TYPE_SYMBOL:
869 rtn->un.symbol.name = DBG_strdup(exp->un.symbol.name);
871 case EXPR_TYPE_PSTRUCT:
872 case EXPR_TYPE_STRUCT:
873 rtn->un.structure.exp1 = DEBUG_CloneExpr(exp->un.structure.exp1);
874 rtn->un.structure.element_name = DBG_strdup(exp->un.structure.element_name);
877 for(i=0; i < exp->un.call.nargs; i++)
879 rtn->un.call.arg[i] = DEBUG_CloneExpr(exp->un.call.arg[i]);
881 rtn->un.call.funcname = DBG_strdup(exp->un.call.funcname);
883 case EXPR_TYPE_BINOP:
884 rtn->un.binop.exp1 = DEBUG_CloneExpr(exp->un.binop.exp1);
885 rtn->un.binop.exp2 = DEBUG_CloneExpr(exp->un.binop.exp2);
888 rtn->un.unop.exp1 = DEBUG_CloneExpr(exp->un.unop.exp1);
891 DEBUG_Printf(DBG_CHN_MESG,"Unexpected expression.\n");
892 RaiseException(DEBUG_STATUS_INTERNAL_ERROR, 0, 0, NULL);
901 * Recursively go through an expression tree and free all memory associated
905 DEBUG_FreeExpr(struct expr * exp)
912 DEBUG_FreeExpr(exp->un.cast.expr);
914 case EXPR_TYPE_INTVAR:
915 DBG_free((char *) exp->un.intvar.name);
917 case EXPR_TYPE_US_CONST:
918 case EXPR_TYPE_CONST:
920 case EXPR_TYPE_STRING:
921 DBG_free((char *) exp->un.string.str);
923 case EXPR_TYPE_SYMBOL:
924 DBG_free((char *) exp->un.symbol.name);
926 case EXPR_TYPE_PSTRUCT:
927 case EXPR_TYPE_STRUCT:
928 DEBUG_FreeExpr(exp->un.structure.exp1);
929 DBG_free((char *) exp->un.structure.element_name);
932 for(i=0; i < exp->un.call.nargs; i++)
934 DEBUG_FreeExpr(exp->un.call.arg[i]);
936 DBG_free((char *) exp->un.call.funcname);
938 case EXPR_TYPE_BINOP:
939 DEBUG_FreeExpr(exp->un.binop.exp1);
940 DEBUG_FreeExpr(exp->un.binop.exp2);
943 DEBUG_FreeExpr(exp->un.unop.exp1);
946 DEBUG_Printf(DBG_CHN_MESG,"Unexpected expression.\n");
947 RaiseException(DEBUG_STATUS_INTERNAL_ERROR, 0, 0, NULL);