#define ao_scheme_reset_stack()
#endif
+#if DBG_MEM
+#define DBG_MEM_RECORD 1
+#endif
+
#if DBG_MEM
int dbg_move_depth;
int dbg_mem = DBG_MEM_START;
int dbg_validate = 0;
+#endif
+#if DBG_MEM_RECORD
struct ao_scheme_record {
struct ao_scheme_record *next;
const struct ao_scheme_type *type;
}
static void
-ao_scheme_record_compare(char *where,
- struct ao_scheme_record *a,
- struct ao_scheme_record *b)
+ao_scheme_record_compare(const char *where,
+ struct ao_scheme_record *a,
+ struct ao_scheme_record *b)
{
while (a && b) {
if (a->type != b->type || a->size != b->size) {
#else
#define ao_scheme_record_reset()
+#define ao_scheme_record(t,a,s)
#endif
uint8_t ao_scheme_exception;
void **addr;
};
-static struct ao_scheme_cons *save_cons[2];
-static struct ao_scheme_string *save_string[2];
-static struct ao_scheme_frame *save_frame[1];
-static ao_poly save_poly[3];
+#define AO_SCHEME_NUM_STASH 6
+static ao_poly stash_poly[AO_SCHEME_NUM_STASH];
+static int stash_poly_ptr;
static const struct ao_scheme_root ao_scheme_root[] = {
{
- .type = &ao_scheme_cons_type,
- .addr = (void **) &save_cons[0],
- },
- {
- .type = &ao_scheme_cons_type,
- .addr = (void **) &save_cons[1],
- },
- {
- .type = &ao_scheme_string_type,
- .addr = (void **) &save_string[0],
- },
- {
- .type = &ao_scheme_string_type,
- .addr = (void **) &save_string[1],
+ .type = NULL,
+ .addr = (void **) (void *) &stash_poly[0]
},
{
- .type = &ao_scheme_frame_type,
- .addr = (void **) &save_frame[0],
+ .type = NULL,
+ .addr = (void **) (void *) &stash_poly[1]
},
{
.type = NULL,
- .addr = (void **) (void *) &save_poly[0]
+ .addr = (void **) (void *) &stash_poly[2]
},
{
.type = NULL,
- .addr = (void **) (void *) &save_poly[1]
+ .addr = (void **) (void *) &stash_poly[3]
},
{
.type = NULL,
- .addr = (void **) (void *) &save_poly[2]
+ .addr = (void **) (void *) &stash_poly[4]
},
{
- .type = &ao_scheme_atom_type,
- .addr = (void **) &ao_scheme_atoms
+ .type = NULL,
+ .addr = (void **) (void *) &stash_poly[5]
},
{
.type = &ao_scheme_frame_type,
.type = &ao_scheme_cons_type,
.addr = (void **) &ao_scheme_read_stack,
},
+#ifdef AO_SCHEME_FEATURE_PORT
+ {
+ .type = NULL,
+ .addr = (void **) (void *) &ao_scheme_stdin,
+ },
+ {
+ .type = NULL,
+ .addr = (void **) (void *) &ao_scheme_stdout,
+ },
+ {
+ .type = NULL,
+ .addr = (void **) (void *) &ao_scheme_stderr,
+ },
+#endif
#ifdef AO_SCHEME_MAKE_CONST
{
.type = &ao_scheme_bool_type,
#define AO_SCHEME_BUSY_SIZE ((AO_SCHEME_POOL + 31) / 32)
+static int ao_scheme_printing, ao_scheme_print_cleared;
+#if DBG_MEM
+static int ao_scheme_collecting;
+#endif
static uint8_t ao_scheme_busy[AO_SCHEME_BUSY_SIZE];
static uint8_t ao_scheme_cons_note[AO_SCHEME_BUSY_SIZE];
static uint8_t ao_scheme_cons_last[AO_SCHEME_BUSY_SIZE];
};
};
-#define AO_SCHEME_NCHUNK 64
+#define AO_SCHEME_NCHUNK (AO_SCHEME_POOL / 64)
static struct ao_scheme_chunk ao_scheme_chunk[AO_SCHEME_NCHUNK];
/* Offset of an address within the pool. */
static inline uint16_t pool_offset(void *addr) {
#if DBG_MEM
- if (!AO_SCHEME_IS_POOL(addr))
+ if (!ao_scheme_is_pool_addr(addr))
ao_scheme_abort();
#endif
return ((uint8_t *) addr) - ao_scheme_pool;
/* Off the left side */
if (l == 0 && chunk_last && offset > ao_scheme_chunk[0].old_offset)
ao_scheme_abort();
+
+ if (l < chunk_last && ao_scheme_chunk[l].old_offset == offset)
+ ao_scheme_abort();
#endif
/* Shuffle existing entries right */
dump_busy(void)
{
int i;
- MDBG_MOVE("busy:");
+ printf("busy:");
for (i = 0; i < ao_scheme_top; i += 4) {
if ((i & 0xff) == 0) {
- MDBG_MORE("\n");
- MDBG_MOVE("%s", "");
+ printf("\n\t");
}
else if ((i & 0x1f) == 0)
- MDBG_MORE(" ");
+ printf(" ");
if (busy(ao_scheme_busy, i))
- MDBG_MORE("*");
+ printf("*");
else
- MDBG_MORE("-");
+ printf("-");
}
- MDBG_MORE ("\n");
+ printf ("\n");
}
#define DUMP_BUSY() dump_busy()
#else
#define DUMP_BUSY()
#endif
+#if MDBG_DUMP
+static void
+dump_atoms(int show_marked)
+{
+ struct ao_scheme_atom *atom;
+
+ printf("atoms {\n");
+ for (atom = ao_scheme_atoms; atom; atom = ao_scheme_poly_atom(atom->next)) {
+ printf("\t%d: %s", MDBG_OFFSET(atom), atom->name);
+ if (show_marked)
+ printf(" %s", ao_scheme_marked(atom) ? "referenced" : "unreferenced");
+ printf("\n");
+ }
+ printf("}\n");
+
+}
+#define DUMP_ATOMS(a) dump_atoms(a)
+#else
+#define DUMP_ATOMS(a)
+#endif
+
static const struct ao_scheme_type * const ao_scheme_types[AO_SCHEME_NUM_TYPE] = {
[AO_SCHEME_CONS] = &ao_scheme_cons_type,
[AO_SCHEME_INT] = NULL,
#ifdef AO_SCHEME_FEATURE_VECTOR
[AO_SCHEME_VECTOR] = &ao_scheme_vector_type,
#endif
+#ifdef AO_SCHEME_FEATURE_PORT
+ [AO_SCHEME_PORT] = &ao_scheme_port_type,
+#endif
};
static int
#if DBG_MEM_STATS
int loops = 0;
#endif
-#if DBG_MEM
+#if DBG_MEM_RECORD
struct ao_scheme_record *mark_record = NULL, *move_record = NULL;
-
- MDBG_MOVE("collect %d\n", ao_scheme_collects[style]);
#endif
- MDBG_DO(ao_scheme_frame_write(ao_scheme_frame_poly(ao_scheme_frame_global)));
+ MDBG_MOVE("collect %lu\n", ao_scheme_collects[style]);
+
+ MDBG_DO(ao_scheme_frame_write(stdout, ao_scheme_frame_poly(ao_scheme_frame_global), true));
+ MDBG_DO(++ao_scheme_collecting);
ao_scheme_reset_stack();
chunk_low = top = ao_scheme_last_top;
}
for (;;) {
-#if DBG_MEM_STATS
- loops++;
-#endif
MDBG_MOVE("move chunks from %d to %d\n", chunk_low, top);
/* Find the sizes of the first chunk of objects to move */
reset_chunks();
walk(ao_scheme_mark_ref, ao_scheme_poly_mark_ref);
-#if DBG_MEM
+#ifdef AO_SCHEME_FEATURE_PORT
+ ao_scheme_port_check_references();
+#endif
+ ao_scheme_atom_check_references();
+
+#if DBG_MEM_RECORD
ao_scheme_record_free(mark_record);
mark_record = ao_scheme_record_save();
if (mark_record && move_record)
ao_scheme_record_compare("mark", move_record, mark_record);
#endif
+ DUMP_ATOMS(1);
DUMP_BUSY();
/* Find the first moving object */
for (i = 0; i < chunk_last; i++) {
uint16_t size = ao_scheme_chunk[i].size;
-
#if DBG_MEM
if (!size)
ao_scheme_abort();
top += size;
}
+ /* Short-circuit the rest of the loop when all of the
+ * found objects aren't moving. This isn't strictly
+ * necessary as the rest of the loop is structured to
+ * work in this case, but GCC 7.2.0 with optimization
+ * greater than 2 generates incorrect code for this...
+ */
+ if (i == AO_SCHEME_NCHUNK) {
+ chunk_low = chunk_high;
+#if DBG_MEM_STATS
+ loops++;
+#endif
+ continue;
+ }
+
/*
* Limit amount of chunk array used in mapping moves
* to the active region
if (chunk_first < chunk_last) {
/* Relocate all references to the objects */
walk(ao_scheme_move, ao_scheme_poly_move);
+ ao_scheme_atom_move();
+#ifdef AO_SCHEME_FEATURE_PORT
+ /* the set of open ports gets relocated but not marked, so
+ * just deal with it separately
+ */
+ ao_scheme_poly_move(&ao_scheme_open_ports, 0);
+#endif
-#if DBG_MEM
+#if DBG_MEM_RECORD
ao_scheme_record_free(move_record);
move_record = ao_scheme_record_save();
if (mark_record && move_record)
ao_scheme_record_compare("move", mark_record, move_record);
#endif
+ DUMP_ATOMS(0);
}
+#if DBG_MEM_STATS
+ loops++;
+#endif
/* If we ran into the end of the heap, then
* there's no need to keep walking
*/
#if DBG_MEM_STACK
fprintf(stderr, "max collect stack depth %lu\n", mem_collect_max_depth);
#endif
+ MDBG_DO(--ao_scheme_collecting);
return AO_SCHEME_POOL - ao_scheme_top;
}
reset_chunks();
walk(ao_scheme_mark_ref, ao_scheme_poly_mark_ref);
while (cons) {
- if (!AO_SCHEME_IS_POOL(cons))
+ if (!ao_scheme_is_pool_addr(cons))
break;
offset = pool_offset(cons);
if (busy(ao_scheme_busy, offset)) {
ao_scheme_mark_memory(const struct ao_scheme_type *type, void *addr)
{
int offset;
- if (!AO_SCHEME_IS_POOL(addr))
+ if (!ao_scheme_is_pool_addr(addr))
return 1;
offset = pool_offset(addr);
ao_scheme_mark(const struct ao_scheme_type *type, void *addr)
{
int ret;
- MDBG_MOVE("mark %d\n", MDBG_OFFSET(addr));
+ MDBG_MOVE("mark offset %d\n", MDBG_OFFSET(addr));
MDBG_MOVE_IN();
ret = ao_scheme_mark_memory(type, addr);
if (!ret) {
return 1;
addr = ao_scheme_ref(p);
- if (!AO_SCHEME_IS_POOL(addr))
+ if (!ao_scheme_is_pool_addr(addr))
return 1;
if (type == AO_SCHEME_CONS && do_note_cons) {
ao_scheme_abort();
#endif
- MDBG_MOVE("mark %d\n", MDBG_OFFSET(addr));
+ MDBG_MOVE("poly_mark offset %d\n", MDBG_OFFSET(addr));
MDBG_MOVE_IN();
ret = ao_scheme_mark_memory(lisp_type, addr);
if (!ret) {
void *addr = *ref;
uint16_t offset, orig_offset;
- if (!AO_SCHEME_IS_POOL(addr))
+ if (!ao_scheme_is_pool_addr(addr))
return 1;
(void) type;
offset = move_map(orig_offset);
if (offset != orig_offset) {
MDBG_MOVE("update ref %d %d -> %d\n",
- AO_SCHEME_IS_POOL(ref) ? MDBG_OFFSET(ref) : -1,
+ ao_scheme_is_pool_addr(ref) ? MDBG_OFFSET(ref) : -1,
orig_offset, offset);
*ref = ao_scheme_pool + offset;
}
return 1;
}
mark(ao_scheme_busy, offset);
- MDBG_DO(ao_scheme_record(type, addr, ao_scheme_size(type, addr)));
+ ao_scheme_record(type, addr, ao_scheme_size(type, addr));
return 0;
}
return 1;
addr = ao_scheme_ref(p);
- if (!AO_SCHEME_IS_POOL(addr))
+ if (!ao_scheme_is_pool_addr(addr))
return 1;
orig_offset = pool_offset(addr);
if (offset != orig_offset) {
ao_poly np = ao_scheme_poly(ao_scheme_pool + offset, ao_scheme_poly_base_type(p));
MDBG_MOVE("poly %d moved %d -> %d\n",
- type, orig_offset, offset);
+ ao_scheme_poly_type(np), orig_offset, offset);
*ref = np;
}
return ret;
}
+int
+ao_scheme_marked(void *addr)
+{
+ if (!ao_scheme_is_pool_addr(addr))
+ return 1;
+ return busy(ao_scheme_busy, pool_offset(addr));
+}
+
#if DBG_MEM
-void
+static void
ao_scheme_validate(void)
{
chunk_low = 0;
}
void
-ao_scheme_cons_stash(int id, struct ao_scheme_cons *cons)
+ao_scheme_poly_stash(ao_poly p)
{
- assert(save_cons[id] == 0);
- save_cons[id] = cons;
+ assert(stash_poly_ptr < AO_SCHEME_NUM_STASH);
+ stash_poly[stash_poly_ptr++] = p;
}
-struct ao_scheme_cons *
-ao_scheme_cons_fetch(int id)
+ao_poly
+ao_scheme_poly_fetch(void)
{
- struct ao_scheme_cons *cons = save_cons[id];
- save_cons[id] = NULL;
- return cons;
-}
+ ao_poly p;
-void
-ao_scheme_poly_stash(int id, ao_poly poly)
-{
- assert(save_poly[id] == AO_SCHEME_NIL);
- save_poly[id] = poly;
+ assert (stash_poly_ptr > 0);
+ p = stash_poly[--stash_poly_ptr];
+ stash_poly[stash_poly_ptr] = AO_SCHEME_NIL;
+ return p;
}
-ao_poly
-ao_scheme_poly_fetch(int id)
+int
+ao_scheme_print_mark_addr(void *addr)
{
- ao_poly poly = save_poly[id];
- save_poly[id] = AO_SCHEME_NIL;
- return poly;
+ int offset;
+
+#if DBG_MEM
+ if (ao_scheme_collecting)
+ ao_scheme_abort();
+#endif
+
+ if (!ao_scheme_is_pool_addr(addr))
+ return 0;
+
+ if (!ao_scheme_print_cleared) {
+ ao_scheme_print_cleared = 1;
+ memset(ao_scheme_busy, '\0', sizeof (ao_scheme_busy));
+ }
+ offset = pool_offset(addr);
+ if (busy(ao_scheme_busy, offset))
+ return 1;
+ mark(ao_scheme_busy, offset);
+ return 0;
}
void
-ao_scheme_string_stash(int id, struct ao_scheme_string *string)
+ao_scheme_print_clear_addr(void *addr)
{
- assert(save_string[id] == NULL);
- save_string[id] = string;
-}
+ int offset;
-struct ao_scheme_string *
-ao_scheme_string_fetch(int id)
-{
- struct ao_scheme_string *string = save_string[id];
- save_string[id] = NULL;
- return string;
+#if DBG_MEM
+ if (ao_scheme_collecting)
+ ao_scheme_abort();
+#endif
+
+ if (!ao_scheme_is_pool_addr(addr))
+ return;
+
+ if (!ao_scheme_print_cleared)
+ return;
+ offset = pool_offset(addr);
+ clear(ao_scheme_busy, offset);
}
+/* Notes that printing has started */
void
-ao_scheme_frame_stash(int id, struct ao_scheme_frame *frame)
+ao_scheme_print_start(void)
{
- assert(save_frame[id] == NULL);
- save_frame[id] = frame;
+ ao_scheme_printing++;
}
-struct ao_scheme_frame *
-ao_scheme_frame_fetch(int id)
+/* Notes that printing has ended. Returns 1 if printing is still going on */
+int
+ao_scheme_print_stop(void)
{
- struct ao_scheme_frame *frame = save_frame[id];
- save_frame[id] = NULL;
- return frame;
+ ao_scheme_printing--;
+ if (ao_scheme_printing != 0)
+ return 1;
+ ao_scheme_print_cleared = 0;
+ return 0;
}
projects / fw / altos / blobdiff