static void sexp_print_simple (sexp ctx, sexp x, sexp out, int depth) {
int i;
if ((!sexp_pointerp(x)) || sexp_symbolp(x) || sexp_stringp(x)
|| sexp_flonump(x) || sexp_bignump(x)) {
sexp_write(ctx, x, out);
} else if (depth <= 0) {
goto print_name;
} else if (sexp_synclop(x)) {
sexp_write_string(ctx, "#<sc ", out);
sexp_print_simple(ctx, sexp_synclo_expr(x), out, depth);
sexp_write_string(ctx, ">", out);
} else if (sexp_pairp(x)) {
sexp_write_char(ctx, '(', out);
sexp_print_simple(ctx, sexp_car(x), out, depth-1);
sexp_write_string(ctx, " . ", out);
sexp_print_simple(ctx, sexp_cdr(x), out, depth-1);
sexp_write_char(ctx, ')', out);
} else if (sexp_vectorp(x)) {
sexp_write_string(ctx, "#(", out);
for (i=0; i<SEXP_HEAP_VECTOR_DEPTH && i<(int)sexp_vector_length(x); i++) {
if (i>0)
sexp_write_char(ctx, ' ', out);
sexp_print_simple(ctx, sexp_vector_ref(x, i), out, depth-1);
}
if (i<(int)sexp_vector_length(x))
sexp_write_string(ctx, " ...", out);
sexp_write_char(ctx, ')', out);
} else {
print_name:
sexp_write_string(ctx, "#<", out);
sexp_write(ctx, sexp_object_type_name(ctx, x), out);
sexp_write_string(ctx, ">", out);
}
}
static sexp sexp_heap_walk (sexp ctx, int depth, int printp) {
size_t freed;
sexp_uint_t stats[256], hi_type=0, i;
sexp_heap h = sexp_context_heap(ctx);
sexp p, out=SEXP_FALSE;
sexp_free_list q, r;
char *end;
sexp_gc_var3(res, tmp, name);
if (printp)
out = sexp_parameter_ref(ctx,
sexp_env_ref(ctx,
sexp_context_env(ctx),
sexp_global(ctx,SEXP_G_CUR_OUT_SYMBOL),
SEXP_FALSE));
/* run gc once to remove unused variables */
sexp_gc(ctx, &freed);
/* initialize stats */
for (i=0; i<256; i++) stats[i]=0;
/* loop over each heap chunk */
for ( ; h; h=h->next) {
p = (sexp) (h->data + sexp_heap_align(sexp_sizeof(pair)));
q = h->free_list;
end = (char*)h->data + h->size;
while (((char*)p) < end) {
/* find the preceding and succeeding free list pointers */
for (r=q->next; r && ((char*)r<(char*)p); q=r, r=r->next)
;
if ((char*)r == (char*)p) { /* this is a free block, skip */
p = (sexp) (((char*)p) + r->size);
continue;
}
/* otherwise maybe print, then increment the stat and continue */
if (sexp_oportp(out)) {
sexp_print_simple(ctx, p, out, depth);
sexp_write_char(ctx, '\n', out);
}
stats[sexp_pointer_tag(p)]++;
if (sexp_pointer_tag(p) > hi_type)
hi_type = sexp_pointer_tag(p);
p = (sexp) (((char*)p) + sexp_heap_align(sexp_allocated_bytes(ctx, p)));
}
}
/* build and return results */
sexp_gc_preserve3(ctx, res, tmp, name);
res = SEXP_NULL;
for (i=hi_type; i>0; i--)
if (stats[i]) {
name = sexp_string_to_symbol(ctx, sexp_type_name_by_index(ctx, i));
tmp = sexp_cons(ctx, name, sexp_make_fixnum(stats[i]));
res = sexp_cons(ctx, tmp, res);
}
sexp_gc_release3(ctx);
return res;
}
