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

309 lines
6 KiB
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 */
/* $Header$ */
#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 */