924 lines
19 KiB
C
924 lines
19 KiB
C
/*
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* File expr.c - expression handling for Wine internal debugger.
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*
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* Copyright (C) 1997, Eric Youngdale.
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*
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*/
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <limits.h>
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#include <sys/types.h>
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#include <neexe.h>
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#include "module.h"
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#include "task.h"
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#include "selectors.h"
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#include "debugger.h"
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#include "xmalloc.h"
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#include "expr.h"
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#include <stdarg.h>
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struct expr
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{
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unsigned int perm;
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unsigned int type:31;
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union
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{
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struct
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{
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int value;
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} constant;
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struct
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{
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const char * str;
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} string;
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struct
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{
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unsigned int value;
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} u_const;
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struct
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{
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const char * name;
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} symbol;
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struct
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{
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enum debug_regs reg;
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int result;
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} rgister;
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struct
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{
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int unop_type;
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struct expr * exp1;
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int result;
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} unop;
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struct
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{
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int binop_type;
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int result;
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struct expr * exp1;
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struct expr * exp2;
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} binop;
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struct
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{
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struct datatype * cast;
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struct expr * expr;
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} cast;
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struct
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{
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struct expr * exp1;
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const char * element_name;
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int result;
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} structure;
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struct
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{
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struct expr * base;
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struct expr * index;
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} array;
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struct
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{
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const char * funcname;
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int nargs;
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int result;
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struct expr * arg[5];
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} call;
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} un;
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};
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#define EXPR_TYPE_CONST 0
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#define EXPR_TYPE_US_CONST 1
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#define EXPR_TYPE_SYMBOL 2
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#define EXPR_TYPE_REGISTER 3
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#define EXPR_TYPE_BINOP 4
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#define EXPR_TYPE_UNOP 5
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#define EXPR_TYPE_STRUCT 6
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#define EXPR_TYPE_PSTRUCT 7
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#define EXPR_TYPE_ARRAY 8
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#define EXPR_TYPE_CALL 9
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#define EXPR_TYPE_STRING 10
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#define EXPR_TYPE_CAST 11
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static char expr_list[4096];
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static int next_expr_free = 0;
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/*
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* This is how we turn an expression address into the actual value.
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* This works well in the 32 bit domain - not sure at all about the
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* 16 bit world.
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*/
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#define VAL(_exp) DEBUG_GetExprValue(&_exp, NULL)
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static
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struct expr *
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DEBUG_GetFreeExpr()
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{
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struct expr * rtn;
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rtn = (struct expr *) &expr_list[next_expr_free];
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next_expr_free += sizeof(struct expr);
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return rtn;
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}
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void
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DEBUG_FreeExprMem()
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{
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next_expr_free = 0;
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}
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struct expr *
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DEBUG_TypeCastExpr(struct datatype * dt, struct expr * exp)
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{
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struct expr * ex;
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ex = DEBUG_GetFreeExpr();
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ex->type = EXPR_TYPE_CAST;
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ex->un.cast.cast = dt;
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ex->un.cast.expr = exp;
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return ex;
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}
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struct expr *
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DEBUG_RegisterExpr(enum debug_regs regno)
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{
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struct expr * ex;
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ex = DEBUG_GetFreeExpr();
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ex->type = EXPR_TYPE_REGISTER;
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ex->un.rgister.reg = regno;
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return ex;
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}
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struct expr *
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DEBUG_SymbolExpr(const char * name)
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{
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struct expr * ex;
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ex = DEBUG_GetFreeExpr();
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ex->type = EXPR_TYPE_SYMBOL;
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ex->un.symbol.name = name;
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return ex;
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}
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struct expr *
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DEBUG_ConstExpr(int value)
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{
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struct expr * ex;
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ex = DEBUG_GetFreeExpr();
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ex->type = EXPR_TYPE_CONST;
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ex->un.constant.value = value;
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return ex;
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}
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struct expr *
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DEBUG_StringExpr(const char * str)
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{
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struct expr * ex;
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char * pnt;
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ex = DEBUG_GetFreeExpr();
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ex->type = EXPR_TYPE_STRING;
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ex->un.string.str = str+1;
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pnt = strrchr(ex->un.string.str, '"');
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if( pnt != NULL )
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{
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*pnt = '\0';
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}
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return ex;
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}
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struct expr *
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DEBUG_USConstExpr(unsigned int value)
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{
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struct expr * ex;
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ex = DEBUG_GetFreeExpr();
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ex->type = EXPR_TYPE_CONST;
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ex->un.u_const.value = value;
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return ex;
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}
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struct expr *
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DEBUG_BinopExpr(int operator_type, struct expr * exp1, struct expr * exp2)
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{
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struct expr * ex;
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ex = DEBUG_GetFreeExpr();
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ex->type = EXPR_TYPE_BINOP;
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ex->un.binop.binop_type = operator_type;
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ex->un.binop.exp1 = exp1;
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ex->un.binop.exp2 = exp2;
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return ex;
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}
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struct expr *
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DEBUG_UnopExpr(int operator_type, struct expr * exp1)
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{
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struct expr * ex;
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ex = DEBUG_GetFreeExpr();
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ex->type = EXPR_TYPE_UNOP;
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ex->un.unop.unop_type = operator_type;
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ex->un.unop.exp1 = exp1;
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return ex;
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}
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struct expr *
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DEBUG_StructExpr(struct expr * exp, const char * element)
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{
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struct expr * ex;
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ex = DEBUG_GetFreeExpr();
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ex->type = EXPR_TYPE_STRUCT;
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ex->un.structure.exp1 = exp;
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ex->un.structure.element_name = element;
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return ex;
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}
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struct expr *
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DEBUG_StructPExpr(struct expr * exp, const char * element)
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{
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struct expr * ex;
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ex = DEBUG_GetFreeExpr();
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ex->type = EXPR_TYPE_PSTRUCT;
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ex->un.structure.exp1 = exp;
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ex->un.structure.element_name = element;
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return ex;
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}
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struct expr *
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DEBUG_CallExpr(const char * funcname, int nargs, ...)
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{
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struct expr * ex;
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va_list ap;
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int i;
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ex = DEBUG_GetFreeExpr();
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ex->type = EXPR_TYPE_CALL;
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ex->un.call.funcname = funcname;
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ex->un.call.nargs = nargs;
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va_start(ap, nargs);
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for(i=0; i < nargs; i++)
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{
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ex->un.call.arg[i] = va_arg(ap, struct expr *);
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}
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va_end(ap);
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return ex;
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}
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DBG_ADDR
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DEBUG_EvalExpr(struct expr * exp)
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{
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DBG_ADDR rtn;
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int i;
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DBG_ADDR exp1;
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DBG_ADDR exp2;
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unsigned int cexp[5];
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int (*fptr)();
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int scale1;
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int scale2;
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int scale3;
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struct datatype * type1;
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struct datatype * type2;
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rtn.type = NULL;
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rtn.off = NULL;
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rtn.seg = NULL;
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switch(exp->type)
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{
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case EXPR_TYPE_CAST:
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rtn = DEBUG_EvalExpr(exp->un.cast.expr);
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rtn.type = exp->un.cast.cast;
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break;
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case EXPR_TYPE_STRING:
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rtn.type = DEBUG_TypeString;
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rtn.off = (unsigned int) &exp->un.string.str;
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rtn.seg = 0;
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break;
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case EXPR_TYPE_CONST:
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rtn.type = DEBUG_TypeIntConst;
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rtn.off = (unsigned int) &exp->un.constant.value;
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rtn.seg = 0;
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break;
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case EXPR_TYPE_US_CONST:
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rtn.type = DEBUG_TypeUSInt;
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rtn.off = (unsigned int) &exp->un.u_const.value;
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rtn.seg = 0;
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break;
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case EXPR_TYPE_SYMBOL:
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if( !DEBUG_GetSymbolValue(exp->un.symbol.name, -1, &rtn, FALSE ) )
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{
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rtn.type = NULL;
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rtn.off = 0;
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rtn.seg = 0;
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};
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break;
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case EXPR_TYPE_PSTRUCT:
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exp1 = DEBUG_EvalExpr(exp->un.structure.exp1);
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if( exp1.type == NULL )
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{
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break;
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}
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rtn.off = DEBUG_TypeDerefPointer(&exp1, &type1);
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if( type1 == NULL )
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{
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break;
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}
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rtn.type = type1;
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DEBUG_FindStructElement(&rtn, exp->un.structure.element_name,
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&exp->un.structure.result);
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break;
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case EXPR_TYPE_STRUCT:
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exp1 = DEBUG_EvalExpr(exp->un.structure.exp1);
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if( exp1.type == NULL )
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{
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break;
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}
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rtn = exp1;
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DEBUG_FindStructElement(&rtn, exp->un.structure.element_name,
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&exp->un.structure.result);
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break;
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case EXPR_TYPE_CALL:
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/*
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* First, evaluate all of the arguments. If any of them are not
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* evaluable, then bail.
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*/
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for(i=0; i < exp->un.call.nargs; i++)
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{
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exp1 = DEBUG_EvalExpr(exp->un.call.arg[i]);
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if( exp1.type == NULL )
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{
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return rtn;
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}
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cexp[i] = DEBUG_GetExprValue(&exp1, NULL);
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}
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/*
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* Now look up the address of the function itself.
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*/
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if( !DEBUG_GetSymbolValue(exp->un.call.funcname, -1, &rtn, FALSE ) )
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{
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fprintf(stderr, "Failed to find symbol\n");
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break;
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};
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fptr = (int (*)()) rtn.off;
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switch(exp->un.call.nargs)
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{
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case 0:
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exp->un.call.result = (*fptr)();
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break;
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case 1:
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exp->un.call.result = (*fptr)(cexp[0]);
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break;
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case 2:
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exp->un.call.result = (*fptr)(cexp[0], cexp[1]);
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break;
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case 3:
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exp->un.call.result = (*fptr)(cexp[0], cexp[1], cexp[2]);
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break;
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case 4:
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exp->un.call.result = (*fptr)(cexp[0], cexp[1], cexp[2], cexp[3]);
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break;
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case 5:
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exp->un.call.result = (*fptr)(cexp[0], cexp[1], cexp[2], cexp[3], cexp[4]);
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break;
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}
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rtn.type = DEBUG_TypeInt;
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rtn.off = (unsigned int) &exp->un.call.result;
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break;
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case EXPR_TYPE_REGISTER:
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rtn.type = DEBUG_TypeIntConst;
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exp->un.rgister.result = DEBUG_GetRegister(exp->un.rgister.reg);
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rtn.off = (unsigned int) &exp->un.rgister.result;
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if( exp->un.rgister.reg == REG_EIP )
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rtn.seg = CS_reg(&DEBUG_context);
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else
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rtn.seg = DS_reg(&DEBUG_context);
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DBG_FIX_ADDR_SEG( &rtn, 0 );
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break;
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case EXPR_TYPE_BINOP:
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exp1 = DEBUG_EvalExpr(exp->un.binop.exp1);
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exp2 = DEBUG_EvalExpr(exp->un.binop.exp2);
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if( exp1.type == NULL || exp2.type == NULL )
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{
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break;
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}
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if( exp1.type == DEBUG_TypeIntConst && exp2.type == DEBUG_TypeIntConst )
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{
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rtn.type = exp1.type;
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}
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else
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{
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rtn.type = DEBUG_TypeInt;
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}
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rtn.off = (unsigned int) &exp->un.binop.result;
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switch(exp->un.binop.binop_type)
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{
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case EXP_OP_ADD:
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type1 = DEBUG_GetPointerType(exp1.type);
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type2 = DEBUG_GetPointerType(exp2.type);
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scale1 = 1;
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scale2 = 1;
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if( type1 != NULL && type2 != NULL )
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{
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break;
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}
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else if( type1 != NULL )
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{
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scale2 = DEBUG_GetObjectSize(type1);
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rtn.type = exp1.type;
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}
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else if( type2 != NULL )
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{
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scale1 = DEBUG_GetObjectSize(type2);
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rtn.type = exp2.type;
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}
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rtn.seg = 0;
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exp->un.binop.result = (VAL(exp1) * scale1 + scale2 * VAL(exp2));
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break;
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case EXP_OP_SUB:
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type1 = DEBUG_GetPointerType(exp1.type);
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type2 = DEBUG_GetPointerType(exp2.type);
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scale1 = 1;
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scale2 = 1;
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scale3 = 1;
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if( type1 != NULL && type2 != NULL )
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{
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if( type1 != type2 )
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{
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break;
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}
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scale3 = DEBUG_GetObjectSize(type1);
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}
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else if( type1 != NULL )
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{
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scale2 = DEBUG_GetObjectSize(type1);
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rtn.type = exp1.type;
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}
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else if( type2 != NULL )
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{
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scale1 = DEBUG_GetObjectSize(type2);
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rtn.type = exp2.type;
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}
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rtn.seg = 0;
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exp->un.binop.result = (VAL(exp1) - VAL(exp2)) / scale3;
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break;
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case EXP_OP_SEG:
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rtn.seg = VAL(exp1);
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exp->un.binop.result = VAL(exp2);
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if (ISV86(&DEBUG_context)) {
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TDB *pTask = (TDB*)GlobalLock16( GetCurrentTask() );
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rtn.seg |= (DWORD)(pTask?(pTask->hModule):0)<<16;
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GlobalUnlock16( GetCurrentTask() );
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}
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break;
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case EXP_OP_LOR:
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rtn.seg = 0;
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exp->un.binop.result = (VAL(exp1) || VAL(exp2));
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break;
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case EXP_OP_LAND:
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rtn.seg = 0;
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exp->un.binop.result = (VAL(exp1) && VAL(exp2));
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break;
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case EXP_OP_OR:
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rtn.seg = 0;
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exp->un.binop.result = (VAL(exp1) | VAL(exp2));
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break;
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case EXP_OP_AND:
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rtn.seg = 0;
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exp->un.binop.result = (VAL(exp1) & VAL(exp2));
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break;
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case EXP_OP_XOR:
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rtn.seg = 0;
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exp->un.binop.result = (VAL(exp1) ^ VAL(exp2));
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break;
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case EXP_OP_EQ:
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rtn.seg = 0;
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exp->un.binop.result = (VAL(exp1) == VAL(exp2));
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break;
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case EXP_OP_GT:
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rtn.seg = 0;
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exp->un.binop.result = (VAL(exp1) > VAL(exp2));
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break;
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case EXP_OP_LT:
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rtn.seg = 0;
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exp->un.binop.result = (VAL(exp1) < VAL(exp2));
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break;
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case EXP_OP_GE:
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rtn.seg = 0;
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exp->un.binop.result = (VAL(exp1) >= VAL(exp2));
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break;
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case EXP_OP_LE:
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rtn.seg = 0;
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exp->un.binop.result = (VAL(exp1) <= VAL(exp2));
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break;
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case EXP_OP_NE:
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rtn.seg = 0;
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exp->un.binop.result = (VAL(exp1) != VAL(exp2));
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break;
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case EXP_OP_SHL:
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rtn.seg = 0;
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exp->un.binop.result = ((unsigned) VAL(exp1) << VAL(exp2));
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break;
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case EXP_OP_SHR:
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rtn.seg = 0;
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exp->un.binop.result = ((unsigned) VAL(exp1) >> VAL(exp2));
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break;
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case EXP_OP_MUL:
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rtn.seg = 0;
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exp->un.binop.result = (VAL(exp1) * VAL(exp2));
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break;
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case EXP_OP_DIV:
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if( VAL(exp2) != 0 )
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{
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rtn.seg = 0;
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exp->un.binop.result = (VAL(exp1) / VAL(exp2));
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}
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else
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{
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rtn.seg = 0;
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rtn.type = NULL;
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rtn.off = 0;
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}
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break;
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case EXP_OP_REM:
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if( VAL(exp2) != 0 )
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{
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|
rtn.seg = 0;
|
|
exp->un.binop.result = (VAL(exp1) % VAL(exp2));
|
|
}
|
|
else
|
|
{
|
|
rtn.seg = 0;
|
|
rtn.type = NULL;
|
|
rtn.off = 0;
|
|
}
|
|
break;
|
|
case EXP_OP_ARR:
|
|
DEBUG_ArrayIndex(&exp1, &rtn, VAL(exp2));
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
break;
|
|
case EXPR_TYPE_UNOP:
|
|
exp1 = DEBUG_EvalExpr(exp->un.unop.exp1);
|
|
if( exp1.type == NULL )
|
|
{
|
|
break;
|
|
}
|
|
rtn.off = (unsigned int) &exp->un.unop.result;
|
|
if( exp1.type == DEBUG_TypeIntConst )
|
|
{
|
|
rtn.type = exp1.type;
|
|
}
|
|
else
|
|
{
|
|
rtn.type = DEBUG_TypeInt;
|
|
}
|
|
switch(exp->un.binop.binop_type)
|
|
{
|
|
case EXP_OP_NEG:
|
|
rtn.seg = 0;
|
|
exp->un.unop.result = -VAL(exp1);
|
|
break;
|
|
case EXP_OP_NOT:
|
|
rtn.seg = 0;
|
|
exp->un.unop.result = !VAL(exp1);
|
|
break;
|
|
case EXP_OP_LNOT:
|
|
rtn.seg = 0;
|
|
exp->un.unop.result = ~VAL(exp1);
|
|
break;
|
|
case EXP_OP_DEREF:
|
|
rtn.seg = 0;
|
|
rtn.off = (unsigned int) DEBUG_TypeDerefPointer(&exp1, &rtn.type);
|
|
break;
|
|
case EXP_OP_FORCE_DEREF:
|
|
rtn.seg = 0;
|
|
rtn.off = *(unsigned int *) exp1.off;
|
|
break;
|
|
case EXP_OP_ADDR:
|
|
rtn.seg = 0;
|
|
rtn.type = DEBUG_FindOrMakePointerType(exp1.type);
|
|
exp->un.unop.result = exp1.off;
|
|
break;
|
|
}
|
|
break;
|
|
default:
|
|
fprintf(stderr,"Unexpected expression.\n");
|
|
exit(123);
|
|
break;
|
|
}
|
|
|
|
return rtn;
|
|
}
|
|
|
|
|
|
int
|
|
DEBUG_DisplayExpr(struct expr * exp)
|
|
{
|
|
int i;
|
|
|
|
|
|
switch(exp->type)
|
|
{
|
|
case EXPR_TYPE_CAST:
|
|
fprintf(stderr, "((");
|
|
DEBUG_PrintTypeCast(exp->un.cast.cast);
|
|
fprintf(stderr, ")");
|
|
DEBUG_DisplayExpr(exp->un.cast.expr);
|
|
fprintf(stderr, ")");
|
|
break;
|
|
case EXPR_TYPE_REGISTER:
|
|
DEBUG_PrintRegister(exp->un.rgister.reg);
|
|
break;
|
|
case EXPR_TYPE_US_CONST:
|
|
fprintf(stderr, "%ud", exp->un.u_const.value);
|
|
break;
|
|
case EXPR_TYPE_CONST:
|
|
fprintf(stderr, "%d", exp->un.u_const.value);
|
|
break;
|
|
case EXPR_TYPE_STRING:
|
|
fprintf(stderr, "\"%s\"", exp->un.string.str);
|
|
break;
|
|
case EXPR_TYPE_SYMBOL:
|
|
fprintf(stderr, "%s" , exp->un.symbol.name);
|
|
break;
|
|
case EXPR_TYPE_PSTRUCT:
|
|
DEBUG_DisplayExpr(exp->un.structure.exp1);
|
|
fprintf(stderr, "->%s", exp->un.structure.element_name);
|
|
break;
|
|
case EXPR_TYPE_STRUCT:
|
|
DEBUG_DisplayExpr(exp->un.structure.exp1);
|
|
fprintf(stderr, ".%s", exp->un.structure.element_name);
|
|
break;
|
|
case EXPR_TYPE_CALL:
|
|
/*
|
|
* First, evaluate all of the arguments. If any of them are not
|
|
* evaluable, then bail.
|
|
*/
|
|
fprintf(stderr, "%s(",exp->un.call.funcname);
|
|
for(i=0; i < exp->un.call.nargs; i++)
|
|
{
|
|
DEBUG_DisplayExpr(exp->un.call.arg[i]);
|
|
if( i != exp->un.call.nargs - 1 )
|
|
{
|
|
fprintf(stderr, ", ");
|
|
}
|
|
}
|
|
fprintf(stderr, ")");
|
|
break;
|
|
case EXPR_TYPE_BINOP:
|
|
fprintf(stderr, "( ");
|
|
DEBUG_DisplayExpr(exp->un.binop.exp1);
|
|
switch(exp->un.binop.binop_type)
|
|
{
|
|
case EXP_OP_ADD:
|
|
fprintf(stderr, " + ");
|
|
break;
|
|
case EXP_OP_SUB:
|
|
fprintf(stderr, " - ");
|
|
break;
|
|
case EXP_OP_SEG:
|
|
fprintf(stderr, ":");
|
|
break;
|
|
case EXP_OP_LOR:
|
|
fprintf(stderr, " || ");
|
|
break;
|
|
case EXP_OP_LAND:
|
|
fprintf(stderr, " && ");
|
|
break;
|
|
case EXP_OP_OR:
|
|
fprintf(stderr, " | ");
|
|
break;
|
|
case EXP_OP_AND:
|
|
fprintf(stderr, " & ");
|
|
break;
|
|
case EXP_OP_XOR:
|
|
fprintf(stderr, " ^ ");
|
|
break;
|
|
case EXP_OP_EQ:
|
|
fprintf(stderr, " == ");
|
|
break;
|
|
case EXP_OP_GT:
|
|
fprintf(stderr, " > ");
|
|
break;
|
|
case EXP_OP_LT:
|
|
fprintf(stderr, " < ");
|
|
break;
|
|
case EXP_OP_GE:
|
|
fprintf(stderr, " >= ");
|
|
break;
|
|
case EXP_OP_LE:
|
|
fprintf(stderr, " <= ");
|
|
break;
|
|
case EXP_OP_NE:
|
|
fprintf(stderr, " != ");
|
|
break;
|
|
case EXP_OP_SHL:
|
|
fprintf(stderr, " << ");
|
|
break;
|
|
case EXP_OP_SHR:
|
|
fprintf(stderr, " >> ");
|
|
break;
|
|
case EXP_OP_MUL:
|
|
fprintf(stderr, " * ");
|
|
break;
|
|
case EXP_OP_DIV:
|
|
fprintf(stderr, " / ");
|
|
break;
|
|
case EXP_OP_REM:
|
|
fprintf(stderr, " %% ");
|
|
break;
|
|
case EXP_OP_ARR:
|
|
fprintf(stderr, "[");
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
DEBUG_DisplayExpr(exp->un.binop.exp2);
|
|
if( exp->un.binop.binop_type == EXP_OP_ARR )
|
|
{
|
|
fprintf(stderr, "]");
|
|
}
|
|
fprintf(stderr, " )");
|
|
break;
|
|
case EXPR_TYPE_UNOP:
|
|
switch(exp->un.binop.binop_type)
|
|
{
|
|
case EXP_OP_NEG:
|
|
fprintf(stderr, "-");
|
|
break;
|
|
case EXP_OP_NOT:
|
|
fprintf(stderr, "!");
|
|
break;
|
|
case EXP_OP_LNOT:
|
|
fprintf(stderr, "~");
|
|
break;
|
|
case EXP_OP_DEREF:
|
|
fprintf(stderr, "*");
|
|
break;
|
|
case EXP_OP_ADDR:
|
|
fprintf(stderr, "&");
|
|
break;
|
|
}
|
|
DEBUG_DisplayExpr(exp->un.unop.exp1);
|
|
break;
|
|
default:
|
|
fprintf(stderr,"Unexpected expression.\n");
|
|
exit(123);
|
|
break;
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
struct expr *
|
|
DEBUG_CloneExpr(struct expr * exp)
|
|
{
|
|
int i;
|
|
struct expr * rtn;
|
|
|
|
rtn = (struct expr *) xmalloc(sizeof(struct expr));
|
|
|
|
/*
|
|
* First copy the contents of the expression itself.
|
|
*/
|
|
*rtn = *exp;
|
|
|
|
|
|
switch(exp->type)
|
|
{
|
|
case EXPR_TYPE_CAST:
|
|
rtn->un.cast.expr = DEBUG_CloneExpr(exp->un.cast.expr);
|
|
break;
|
|
case EXPR_TYPE_REGISTER:
|
|
case EXPR_TYPE_US_CONST:
|
|
case EXPR_TYPE_CONST:
|
|
break;
|
|
case EXPR_TYPE_STRING:
|
|
rtn->un.string.str = xstrdup(exp->un.string.str);
|
|
break;
|
|
case EXPR_TYPE_SYMBOL:
|
|
rtn->un.symbol.name = xstrdup(exp->un.symbol.name);
|
|
break;
|
|
case EXPR_TYPE_PSTRUCT:
|
|
case EXPR_TYPE_STRUCT:
|
|
rtn->un.structure.exp1 = DEBUG_CloneExpr(exp->un.structure.exp1);
|
|
rtn->un.structure.element_name = xstrdup(exp->un.structure.element_name);
|
|
break;
|
|
case EXPR_TYPE_CALL:
|
|
/*
|
|
* First, evaluate all of the arguments. If any of them are not
|
|
* evaluable, then bail.
|
|
*/
|
|
for(i=0; i < exp->un.call.nargs; i++)
|
|
{
|
|
rtn->un.call.arg[i] = DEBUG_CloneExpr(exp->un.call.arg[i]);
|
|
}
|
|
rtn->un.call.funcname = xstrdup(exp->un.call.funcname);
|
|
break;
|
|
case EXPR_TYPE_BINOP:
|
|
rtn->un.binop.exp1 = DEBUG_CloneExpr(exp->un.binop.exp1);
|
|
rtn->un.binop.exp2 = DEBUG_CloneExpr(exp->un.binop.exp2);
|
|
break;
|
|
case EXPR_TYPE_UNOP:
|
|
rtn->un.unop.exp1 = DEBUG_CloneExpr(exp->un.unop.exp1);
|
|
break;
|
|
default:
|
|
fprintf(stderr,"Unexpected expression.\n");
|
|
exit(123);
|
|
break;
|
|
}
|
|
|
|
return rtn;
|
|
}
|
|
|
|
|
|
/*
|
|
* Recursively go through an expression tree and free all memory associated
|
|
* with it.
|
|
*/
|
|
int
|
|
DEBUG_FreeExpr(struct expr * exp)
|
|
{
|
|
int i;
|
|
|
|
switch(exp->type)
|
|
{
|
|
case EXPR_TYPE_CAST:
|
|
DEBUG_FreeExpr(exp->un.cast.expr);
|
|
break;
|
|
case EXPR_TYPE_REGISTER:
|
|
case EXPR_TYPE_US_CONST:
|
|
case EXPR_TYPE_CONST:
|
|
break;
|
|
case EXPR_TYPE_STRING:
|
|
free((char *) exp->un.string.str);
|
|
break;
|
|
case EXPR_TYPE_SYMBOL:
|
|
free((char *) exp->un.symbol.name);
|
|
break;
|
|
case EXPR_TYPE_PSTRUCT:
|
|
case EXPR_TYPE_STRUCT:
|
|
DEBUG_FreeExpr(exp->un.structure.exp1);
|
|
free((char *) exp->un.structure.element_name);
|
|
break;
|
|
case EXPR_TYPE_CALL:
|
|
/*
|
|
* First, evaluate all of the arguments. If any of them are not
|
|
* evaluable, then bail.
|
|
*/
|
|
for(i=0; i < exp->un.call.nargs; i++)
|
|
{
|
|
DEBUG_FreeExpr(exp->un.call.arg[i]);
|
|
}
|
|
free((char *) exp->un.call.funcname);
|
|
break;
|
|
case EXPR_TYPE_BINOP:
|
|
DEBUG_FreeExpr(exp->un.binop.exp1);
|
|
DEBUG_FreeExpr(exp->un.binop.exp2);
|
|
break;
|
|
case EXPR_TYPE_UNOP:
|
|
DEBUG_FreeExpr(exp->un.unop.exp1);
|
|
break;
|
|
default:
|
|
fprintf(stderr,"Unexpected expression.\n");
|
|
exit(123);
|
|
break;
|
|
}
|
|
|
|
free(exp);
|
|
return TRUE;
|
|
}
|