X-Git-Url: https://git.gag.com/?a=blobdiff_plain;f=src%2Flisp%2Fao_lisp_mem.c;h=6e656454b1c2fe22edb4857578a75dedb3904eff;hb=d8cf97fe22acefab40d7bb321138e46d4483fef7;hp=f6a108e9180c56b930535f4535010f78f438b3ca;hpb=56d46ceaa1413415f25e47e81036426132f99924;p=fw%2Faltos

diff --git a/src/lisp/ao_lisp_mem.c b/src/lisp/ao_lisp_mem.c
index f6a108e9..6e656454 100644
--- a/src/lisp/ao_lisp_mem.c
+++ b/src/lisp/ao_lisp_mem.c
@@ -12,23 +12,66 @@
  * General Public License for more details.
  */
 
+#define AO_LISP_CONST_BITS
+
 #include "ao_lisp.h"
 #include <stdio.h>
 
-uint8_t	ao_lisp_pool[AO_LISP_POOL];
+#ifdef AO_LISP_MAKE_CONST
+#include <stdlib.h>
+uint8_t ao_lisp_const[AO_LISP_POOL_CONST] __attribute__((aligned(4)));
+#define ao_lisp_pool ao_lisp_const
+#undef AO_LISP_POOL
+#define AO_LISP_POOL AO_LISP_POOL_CONST
+#else
+uint8_t	ao_lisp_pool[AO_LISP_POOL] __attribute__((aligned(4)));
+#endif
+
+#if 0
+#define DBG_COLLECT_ALWAYS
+#endif
+
+#if 0
+#define DBG_POOL
+#endif
+
+#if 0
+#define DBG_INCLUDE
+#define DBG_DUMP	0
+#define DBG_OFFSET(a)	((int) ((uint8_t *) (a) - ao_lisp_pool))
+#define DBG(...) printf(__VA_ARGS__)
+#define DBG_DO(a)	a
+static int move_dump;
+static int move_depth;
+#define DBG_RESET() (move_depth = 0)
+#define DBG_MOVE(...) do { if(move_dump) { int d; for (d = 0; d < move_depth; d++) printf ("  "); printf(__VA_ARGS__); } } while (0)
+#define DBG_MOVE_IN()	(move_depth++)
+#define DBG_MOVE_OUT()	(move_depth--)
+#else
+#define DBG(...)
+#define DBG_DO(a)
+#define DBG_RESET()
+#define DBG_MOVE(...)
+#define DBG_MOVE_IN()
+#define DBG_MOVE_OUT()
+#endif
+
+uint8_t	ao_lisp_exception;
 
 struct ao_lisp_root {
 	void				**addr;
-	const struct ao_lisp_mem_type	*type;
+	const struct ao_lisp_type	*type;
 };
 
+#define AO_LISP_ROOT	16
+
 static struct ao_lisp_root	ao_lisp_root[AO_LISP_ROOT];
 
 static uint8_t	ao_lisp_busy[AO_LISP_POOL / 32];
 
 static uint8_t	ao_lisp_moving[AO_LISP_POOL / 32];
 
-static uint16_t	ao_lisp_top;
+uint16_t	ao_lisp_top;
 
 static inline void mark(uint8_t *tag, int offset) {
 	int	byte = offset >> 5;
@@ -59,9 +102,13 @@ static int
 mark_object(uint8_t *tag, void *addr, int size) {
 	int	base;
 	int	bound;
+
 	if (!addr)
 		return 1;
 
+	if ((uint8_t *) addr < ao_lisp_pool || ao_lisp_pool + AO_LISP_POOL <= (uint8_t*) addr)
+		return 1;
+
 	base = (uint8_t *) addr - ao_lisp_pool;
 	bound = base + size;
 
@@ -97,6 +144,23 @@ clear_object(uint8_t *tag, void *addr, int size) {
 	return 0;
 }
 
+static int
+busy_object(uint8_t *tag, void *addr) {
+	int	base;
+
+	if (!addr)
+		return 1;
+
+	if ((uint8_t *) addr < ao_lisp_pool || ao_lisp_pool + AO_LISP_POOL <= (uint8_t*) addr)
+		return 1;
+
+	base = (uint8_t *) addr - ao_lisp_pool;
+	base = limit(base);
+	if (busy(tag, base))
+		return 1;
+	return 0;
+}
+
 static void	*move_old, *move_new;
 static int	move_size;
 
@@ -105,57 +169,131 @@ move_object(void)
 {
 	int	i;
 
+	DBG_RESET();
+	DBG_MOVE("move %d -> %d\n", DBG_OFFSET(move_old), DBG_OFFSET(move_new));
+	DBG_MOVE_IN();
 	memset(ao_lisp_moving, '\0', sizeof (ao_lisp_moving));
-	for (i = 0; i < AO_LISP_ROOT; i++)
-		if (ao_lisp_root[i].addr) {
-			void *new;
-			new = ao_lisp_move(ao_lisp_root[i].type, *ao_lisp_root[i].addr);
-			if (new)
-				*ao_lisp_root[i].addr = new;
+	for (i = 0; i < AO_LISP_ROOT; i++) {
+		if (!ao_lisp_root[i].addr)
+			continue;
+		if (ao_lisp_root[i].type) {
+			DBG_DO(void *addr = *ao_lisp_root[i].addr);
+			DBG_MOVE("root %d\n", DBG_OFFSET(addr));
+			if (!ao_lisp_move(ao_lisp_root[i].type,
+					  ao_lisp_root[i].addr)) {
+				DBG_MOVE("root moves from %p to %p\n",
+					 addr,
+					 *ao_lisp_root[i].addr);
+			}
+		} else {
+			DBG_DO(ao_poly p = *(ao_poly *) ao_lisp_root[i].addr);
+			if (!ao_lisp_poly_move((ao_poly *) ao_lisp_root[i].addr)) {
+				DBG_MOVE("root poly move from %04x to %04x\n",
+					 p, *(ao_poly *) ao_lisp_root[i].addr);
+			}
 		}
+	}
+	DBG_MOVE_OUT();
+	DBG_MOVE("move done\n");
 }
 
+#if DBG_DUMP
 static void
-collect(void)
+dump_busy(void)
 {
 	int	i;
+	printf("busy:");
+	for (i = 0; i < ao_lisp_top; i += 4) {
+		if ((i & 0xff) == 0)
+			printf("\n");
+		else if ((i & 0x1f) == 0)
+			printf(" ");
+		if (busy(ao_lisp_busy, i))
+			putchar('*');
+		else
+			putchar('-');
+	}
+	printf ("\n");
+}
+#define DUMP_BUSY()	dump_busy()
+#else
+#define DUMP_BUSY()
+#endif
+
+static void
+ao_lisp_mark_busy(void)
+{
+	int i;
 
-	printf("collect\n");
-	/* Mark */
 	memset(ao_lisp_busy, '\0', sizeof (ao_lisp_busy));
-	for (i = 0; i < AO_LISP_ROOT; i++)
-		if (ao_lisp_root[i].addr)
-			ao_lisp_mark(ao_lisp_root[i].type, *ao_lisp_root[i].addr);
+	DBG("mark\n");
+	for (i = 0; i < AO_LISP_ROOT; i++) {
+		if (ao_lisp_root[i].type) {
+			void **a = ao_lisp_root[i].addr, *v;
+			if (a && (v = *a)) {
+				DBG("root %p\n", v);
+				ao_lisp_mark(ao_lisp_root[i].type, v);
+			}
+		} else {
+			ao_poly *a = (ao_poly *) ao_lisp_root[i].addr, p;
+			if (a && (p = *a)) {
+				DBG("root %04x\n", p);
+				ao_lisp_poly_mark(p);
+			}
+		}
+	}
+}
 
+void
+ao_lisp_collect(void)
+{
+	int	i;
+	int	top;
+
+	DBG("collect\n");
+	/* Mark */
+	ao_lisp_mark_busy();
+
+	DUMP_BUSY();
 	/* Compact */
-	ao_lisp_top = 0;
-	for (i = 0; i < AO_LISP_POOL; i += 4) {
+	DBG("find first busy\n");
+	for (i = 0; i < ao_lisp_top; i += 4) {
 		if (!busy(ao_lisp_busy, i))
 			break;
 	}
-	ao_lisp_top = i;
-	while(i < AO_LISP_POOL) {
+	top = i;
+	while(i < ao_lisp_top) {
 		if (busy(ao_lisp_busy, i)) {
+			DBG("busy %d -> %d\n", i, top);
 			move_old = &ao_lisp_pool[i];
-			move_new = &ao_lisp_pool[ao_lisp_top];
+			move_new = &ao_lisp_pool[top];
 			move_size = 0;
 			move_object();
+			DBG("\tbusy size %d\n", move_size);
+			if (move_size == 0)
+				abort();
 			clear_object(ao_lisp_busy, move_old, move_size);
+			mark_object(ao_lisp_busy, move_new, move_size);
 			i += move_size;
-			ao_lisp_top += move_size;
+			top += move_size;
+			DUMP_BUSY();
 		} else {
 			i += 4;
 		}
 	}
+	ao_lisp_top = top;
 }
 
 
-void
-ao_lisp_mark(const struct ao_lisp_mem_type *type, void *addr)
+int
+ao_lisp_mark(const struct ao_lisp_type *type, void *addr)
 {
+	if (!addr)
+		return 1;
 	if (mark_object(ao_lisp_busy, addr, type->size(addr)))
-		return;
+		return 1;
 	type->mark(addr);
+	return 0;
 }
 
 int
@@ -164,54 +302,164 @@ ao_lisp_mark_memory(void *addr, int size)
 	return mark_object(ao_lisp_busy, addr, size);
 }
 
+/*
+ * After the object has been moved, we have to reference it
+ * in the new location. This is only relevant for ao_lisp_poly_move
+ * as it needs to fetch the type byte from the object, which
+ * may have been overwritten by the copy
+ */
+void *
+ao_lisp_move_map(void *addr)
+{
+	if (addr == move_old) {
+		if (busy_object(ao_lisp_moving, addr))
+			return move_new;
+	}
+	return addr;
+}
+
 static void *
 check_move(void *addr, int size)
 {
 	if (addr == move_old) {
-		memmove(move_new, move_old, size);
-		move_size = (size + 3) & ~3;
+		DBG_MOVE("mapping %d -> %d\n", DBG_OFFSET(addr), DBG_OFFSET(move_new));
+		if (!busy_object(ao_lisp_moving, addr)) {
+			DBG_MOVE("  copy %d\n", size);
+			memmove(move_new, move_old, size);
+			move_size = (size + 3) & ~3;
+		}
 		addr = move_new;
 	}
 	return addr;
 }
 
-void *
-ao_lisp_move(const struct ao_lisp_mem_type *type, void *addr)
+int
+ao_lisp_move(const struct ao_lisp_type *type, void **ref)
 {
-	int	size = type->size(addr);
+	void		*addr = *ref;
+	uint8_t		*a = addr;
+	int		size = type->size(addr);
 
 	if (!addr)
-		return NULL;
+		return 1;
 
+#ifndef AO_LISP_MAKE_CONST
+	if (AO_LISP_IS_CONST(addr))
+		return 1;
+#endif
+	DBG_MOVE("object %d\n", DBG_OFFSET(addr));
+	if (a < ao_lisp_pool || ao_lisp_pool + AO_LISP_POOL <= a)
+		abort();
+	DBG_MOVE_IN();
 	addr = check_move(addr, size);
-	if (mark_object(ao_lisp_moving, addr, size))
-		return addr;
+	if (addr != *ref)
+		*ref = addr;
+	if (mark_object(ao_lisp_moving, addr, size)) {
+		DBG_MOVE("already moved\n");
+		DBG_MOVE_OUT();
+		return 1;
+	}
+	DBG_MOVE_OUT();
+	DBG_MOVE("recursing...\n");
+	DBG_MOVE_IN();
 	type->move(addr);
-	return addr;
+	DBG_MOVE_OUT();
+	DBG_MOVE("done %d\n", DBG_OFFSET(addr));
+	return 0;
 }
 
-void *
-ao_lisp_move_memory(void *addr, int size)
+int
+ao_lisp_move_memory(void **ref, int size)
 {
+	void *addr = *ref;
 	if (!addr)
-		return NULL;
+		return 1;
 
+	DBG_MOVE("memory %d\n", DBG_OFFSET(addr));
+	DBG_MOVE_IN();
 	addr = check_move(addr, size);
-	if (mark_object(ao_lisp_moving, addr, size))
-		return NULL;
-	return addr;
+	if (addr != *ref)
+		*ref = addr;
+	if (mark_object(ao_lisp_moving, addr, size)) {
+		DBG_MOVE("already moved\n");
+		DBG_MOVE_OUT();
+		return 1;
+	}
+	DBG_MOVE_OUT();
+	return 0;
+}
+
+#ifdef DBG_POOL
+static int AO_LISP_POOL_CUR = AO_LISP_POOL / 8;
+
+static void
+ao_lisp_poison(void)
+{
+	int	i;
+
+	printf("poison\n");
+	ao_lisp_mark_busy();
+	for (i = 0; i < AO_LISP_POOL_CUR; i += 4) {
+		uint32_t	*a = (uint32_t *) &ao_lisp_pool[i];
+		if (!busy_object(ao_lisp_busy, a))
+			*a = 0xBEEFBEEF;
+	}
+	for (i = 0; i < AO_LISP_POOL_CUR; i += 2) {
+		ao_poly		*a = (uint16_t *) &ao_lisp_pool[i];
+		ao_poly		p = *a;
+
+		if (!ao_lisp_is_const(p)) {
+			void	*r = ao_lisp_ref(p);
+
+			if (ao_lisp_pool <= (uint8_t *) r &&
+			    (uint8_t *) r <= ao_lisp_pool + AO_LISP_POOL_CUR)
+			{
+				if (!busy_object(ao_lisp_busy, r)) {
+					printf("missing reference from %d to %d\n",
+					       (int) ((uint8_t *) a - ao_lisp_pool),
+					       (int) ((uint8_t *) r - ao_lisp_pool));
+				}
+			}
+		}
+	}
 }
 
+#else
+#define AO_LISP_POOL_CUR AO_LISP_POOL
+#endif
+
 void *
 ao_lisp_alloc(int size)
 {
 	void	*addr;
 
-	size = (size + 3) & ~3;
-	if (ao_lisp_top + size > AO_LISP_POOL) {
-		collect();
-		if (ao_lisp_top + size > AO_LISP_POOL)
+	size = ao_lisp_mem_round(size);
+#ifdef DBG_COLLECT_ALWAYS
+	ao_lisp_collect();
+#endif
+	if (ao_lisp_top + size > AO_LISP_POOL_CUR) {
+#ifdef DBG_POOL
+		if (AO_LISP_POOL_CUR < AO_LISP_POOL) {
+			AO_LISP_POOL_CUR += AO_LISP_POOL / 8;
+			ao_lisp_poison();
+		} else
+#endif
+		ao_lisp_collect();
+#ifdef DBG_POOL
+		{
+			int	i;
+
+			for (i = ao_lisp_top; i < AO_LISP_POOL; i += 4) {
+				uint32_t	*p = (uint32_t *) &ao_lisp_pool[i];
+				*p = 0xbeefbeef;
+			}
+		}
+#endif
+
+		if (ao_lisp_top + size > AO_LISP_POOL) {
+			ao_lisp_exception |= AO_LISP_OOM;
 			return NULL;
+		}
 	}
 	addr = ao_lisp_pool + ao_lisp_top;
 	ao_lisp_top += size;
@@ -219,9 +467,10 @@ ao_lisp_alloc(int size)
 }
 
 int
-ao_lisp_root_add(const struct ao_lisp_mem_type *type, void *addr)
+ao_lisp_root_add(const struct ao_lisp_type *type, void *addr)
 {
 	int	i;
+	DBG("add root type %p addr %p\n", type, addr);
 	for (i = 0; i < AO_LISP_ROOT; i++) {
 		if (!ao_lisp_root[i].addr) {
 			ao_lisp_root[i].addr = addr;
@@ -229,9 +478,16 @@ ao_lisp_root_add(const struct ao_lisp_mem_type *type, void *addr)
 			return 1;
 		}
 	}
+	abort();
 	return 0;
 }
 
+int
+ao_lisp_root_poly_add(ao_poly *p)
+{
+	return ao_lisp_root_add(NULL, p);
+}
+
 void
 ao_lisp_root_clear(void *addr)
 {