ack/lang/cem/cemcom.ansi/stab.c

/*
 * (c) copyright 1990 by the Vrije Universiteit, Amsterdam, The Netherlands.
 * See the copyright notice in the ACK home directory, in the file "Copyright".
 *
 * Author: Ceriel J.H. Jacobs
 */

/* D E B U G G E R   S Y M B O L   T A B L E */

/* $Id$ */

#include	"dbsymtab.h"

#ifdef	DBSYMTAB

#include	<alloc.h>
#include	<em_arith.h>
#include	<em_label.h>
#include	<em_code.h>
#include	<flt_arith.h>
#include	<stb.h>

#include	"LLlex.h"
#include	"stack.h"
#include	"def.h"
#include	"type.h"
#include	"struct.h"
#include	"field.h"
#include	"idf.h"
#include	"Lpars.h"
#include	"level.h"

extern long	full_mask[];
extern char	*sprint();

#define INCR_SIZE	64

static struct db_str {
	unsigned	sz;
	char		*base;
	char		*currpos;
} db_str;

static
create_db_str()
{
	if (! db_str.base) {
		db_str.base = Malloc(INCR_SIZE);
		db_str.sz = INCR_SIZE;
	}
	db_str.currpos = db_str.base;
}

static
addc_db_str(c)
	int	c;
{
	int df = db_str.currpos - db_str.base;
	if (df >= db_str.sz-1) {
		db_str.sz += INCR_SIZE;
		db_str.base = Realloc(db_str.base, db_str.sz);
		db_str.currpos = db_str.base + df;
	}
	*db_str.currpos++ = c;
	*db_str.currpos = '\0';
}

static
adds_db_str(s)
	char	*s;
{
	while (*s) addc_db_str(*s++);
}

static
stb_type(tp)
	register struct type	*tp;
{
	char		buf[128];
	static int	stb_count;
	long		l;

	if (tp->tp_dbindex > 0) {
		adds_db_str(sprint(buf, "%d", tp->tp_dbindex));
		return;
	}
	if (tp->tp_dbindex < 0 && tp->tp_size < 0) {
		adds_db_str(sprint(buf, "%d", -tp->tp_dbindex));
		return;
	}
	if (tp->tp_dbindex <= 0) {
		tp->tp_dbindex = ++stb_count;
	}
	adds_db_str(sprint(buf, "%d=", tp->tp_dbindex));
	switch(tp->tp_fund) {
	/* simple types ... */
	case VOID:
		adds_db_str(sprint(buf, "%d", void_type->tp_dbindex));
		break;
	case INT:
	case LONG:
	case CHAR:
	case SHORT:
		 l = full_mask[(int)tp->tp_size];
		if (tp->tp_unsigned) {
			adds_db_str(sprint(buf,
				"r%d;0;%ld",
				tp->tp_dbindex,
				l));
		}
		else {
			l &= ~ (1L << ((int)tp->tp_size * 8 - 1));
			adds_db_str(sprint(buf,
				"r%d;%ld;%ld",
				tp->tp_dbindex,
				-l-1,
				l));
		}
		break;
	case FLOAT:
	case DOUBLE:
	case LNGDBL:
		adds_db_str(sprint(buf,
		       "r%d;%ld;0",
		       tp->tp_dbindex,
		       (long)tp->tp_size));
		break;

	/* constructed types ... */
	case POINTER:
		addc_db_str('*');
		stb_type(tp->tp_up);
		break;
	case ARRAY:
		if (tp->tp_size > 0) {
			adds_db_str("ar");
			stb_type(int_type);
			adds_db_str(sprint(buf, ";0;%ld;", tp->tp_size / tp->tp_up->tp_size - 1));
			stb_type(tp->tp_up);
		}
		break;
	case ENUM:
		if (tp->tp_size < 0) {
			adds_db_str(sprint(buf,
					   "xe%s:",
					   tp->tp_idf->id_text));
			tp->tp_dbindex = -tp->tp_dbindex;
			break;
		}
		addc_db_str('e');
		{
			register struct stack_entry *se = local_level->sl_entry;

			while (se) {
				register struct def	*edef = se->se_idf->id_def;
				while (edef) {
					if (edef->df_type == tp &&
					    edef->df_sc == ENUM) {
						adds_db_str(sprint(buf,
							"%s:%ld,",
							se->se_idf->id_text,
							edef->df_address));
					}
					edef = edef->next;
				}
				se = se->next;
			}
		}
		addc_db_str(';');
		break;
	case STRUCT:
	case UNION:
		if (tp->tp_size < 0) {
			adds_db_str(sprint(buf,
					   "x%c%s:",
					   tp->tp_fund == STRUCT ? 's' : 'u',
					   tp->tp_idf->id_text));
			tp->tp_dbindex = -tp->tp_dbindex;
			break;
		}
		adds_db_str(sprint(buf,
				   "%c%ld",
				   tp->tp_fund == STRUCT ? 's' : 'u',
				   tp->tp_size));
		{
			register struct sdef	*sdef = tp->tp_sdef;

			while (sdef) {
				adds_db_str(sdef->sd_idf->id_text);
				addc_db_str(':');
				if (sdef->sd_type->tp_fund == FIELD) {
					stb_type(sdef->sd_type->tp_up);
					adds_db_str(sprint(buf,
						",%ld,%ld;",
						sdef->sd_offset*8+sdef->sd_type->tp_field->fd_shift,
						sdef->sd_type->tp_field->fd_width));
				}
				else {
					stb_type(sdef->sd_type);
					adds_db_str(sprint(buf,
						",%ld,%ld;",
						sdef->sd_offset*8,
						sdef->sd_type->tp_size*8));
				}
				sdef = sdef->sd_sdef;
			}
		}
		addc_db_str(';');
		break;
	case FUNCTION:
		addc_db_str('f');
		stb_type(tp->tp_up);
	}
}

stb_tag(tg, str)
	register struct tag	*tg;
	char			*str;
{
	create_db_str();
	adds_db_str(str);
	adds_db_str(":T");
	stb_type(tg->tg_type);
	addc_db_str(';');
	C_ms_stb_cst(db_str.base,
		     N_LSYM,
		     tg->tg_type == void_type || tg->tg_type->tp_size >= 32767
		       ? 0
		       : (int)tg->tg_type->tp_size,
		     (arith) 0);
}

stb_typedef(tp, str)
	register struct type	*tp;
	char			*str;
{
	create_db_str();
	adds_db_str(str);
	adds_db_str(":t");
	stb_type(tp);
	addc_db_str(';');
	C_ms_stb_cst(db_str.base,
		     N_LSYM,
		     tp == void_type || tp->tp_size >= 32767
		       ? 0
		       : (int)tp->tp_size,
		     (arith) 0);
}

stb_string(df, kind, str)
	register struct def	*df;
	char			*str;
{
	register struct type	*tp = df->df_type;

	create_db_str();
	adds_db_str(str);
	addc_db_str(':');
	switch(kind) {
	case FUNCTION:
		addc_db_str(df->df_sc == STATIC ? 'f' : 'F');
		stb_type(tp->tp_up);
		addc_db_str(';');
		C_ms_stb_pnam(db_str.base, N_FUN, 1 /* proclevel */, str);
		break;
	default:
		if (df->df_sc == FORMAL ||
		    (df->df_sc == REGISTER && df->df_address >= 0)) {
						/* value parameter */
			addc_db_str('p');
			stb_type(tp);
			addc_db_str(';');
			C_ms_stb_cst(db_str.base, N_PSYM, 0, df->df_address);
		}
		else if (df->df_sc != AUTO && df->df_sc != REGISTER) {
						/* global */
			int stabtp = df->df_initialized ? N_STSYM : N_LCSYM;
			if (df->df_sc == STATIC) {
				if (df->df_level >= L_LOCAL) {
					addc_db_str('V');
				}
				else {
					addc_db_str('S');
				}
			}
			else {
				addc_db_str('G');
			}
			stb_type(tp);
			addc_db_str(';');
			if (df->df_sc == STATIC && df->df_level >= L_LOCAL) {
				C_ms_stb_dlb(db_str.base, stabtp, 0, (label) df->df_address, (arith) 0);
			}
			else {
				C_ms_stb_dnam(db_str.base, stabtp, 0, str, (arith) 0);
			}
		}
		else {	/* local variable */
			stb_type(tp);	/* assign type num to avoid
						   difficult to parse string */
			addc_db_str(';');
			C_ms_stb_cst(db_str.base, N_LSYM, 0, df->df_address);
		}
		break;
	}
}

#endif /* DBSYMTAB */