From 859e7d756090075fc46090df372606c6c9875b5a Mon Sep 17 00:00:00 2001
From: flameyosflow <flamesfflowsnow@gmail.com>
Date: Tue, 16 Dec 2025 22:30:46 +0200
Subject: [PATCH] OMG ADD PROPER PTR BTIMAPOPA AND MEQATADATA

---
 libsuicmez/suicmez_gc.c | 27 +++++++++++++++------------
 libsuicmez/suicmez_gc.h |  7 +++++++
 2 files changed, 22 insertions(+), 12 deletions(-)

diff --git a/libsuicmez/suicmez_gc.c b/libsuicmez/suicmez_gc.c
index 2dd1657..84ea666 100644
--- a/libsuicmez/suicmez_gc.c
+++ b/libsuicmez/suicmez_gc.c
@@ -132,9 +132,7 @@ static void gc_minor_collect(void) {
             size_t fields =
                 (obj->header.size - sizeof(ObjHeader)) / sizeof(void*);
 
-            for (size_t i = 0; i < fields; i++) {
-                obj->fields[i] = forward((Obj*)obj->fields[i]);
-            }
+            scan_object_fields(obj);
             p += obj->header.size;
         }
     }
@@ -146,9 +144,7 @@ static void gc_minor_collect(void) {
         size_t fields =
             (obj->header.size - sizeof(ObjHeader)) / sizeof(void*);
 
-        for (size_t i = 0; i < fields; i++) {
-            obj->fields[i] = forward((Obj*)obj->fields[i]);
-        }
+        scan_object_fields(obj);
 
         scan += obj->header.size;
     }
@@ -168,15 +164,11 @@ static void gc_minor_collect(void) {
     }
 }
 
-void *gc_alloc(size_t payload_size) {
-    size_t size = payload_size + sizeof(ObjHeader);
+void *gc_alloc(const TypeInfo *type, size_t payload_size) {
+    size_t size = sizeof(ObjHeader) + payload_size;
 
     if (gc.from_ptr + size > gc.from_space + gc.young_size) {
         gc_minor_collect();
-        if (gc.from_ptr + size > gc.from_space + gc.young_size) {
-            fprintf(stderr, "GC: out of memory\n");
-            abort();
-        }
     }
 
     Obj *obj = (Obj*)gc.from_ptr;
@@ -184,11 +176,22 @@ void *gc_alloc(size_t payload_size) {
     obj->header.age = 0;
     obj->header.flags = 0;
     obj->header.forwarding = NULL;
+    obj->header.type = type;
 
     gc.from_ptr += size;
     return obj;
 }
 
+static inline void scan_object_fields(Obj *obj) {
+    const TypeInfo *t = obj->header.type;
+
+    for (uint16_t i = 0; i < t->field_count; i++) {
+        if (t->pointer_bitmap[i]) {
+            obj->fields[i] = forward((Obj*)obj->fields[i]);
+        }
+    }
+}
+
 void gc_init(void) {
     gc.young_size = YOUNG_SIZE;
     gc.old_size   = OLD_SIZE;
diff --git a/libsuicmez/suicmez_gc.h b/libsuicmez/suicmez_gc.h
index d568911..e21149d 100644
--- a/libsuicmez/suicmez_gc.h
+++ b/libsuicmez/suicmez_gc.h
@@ -21,8 +21,15 @@ typedef struct ObjHeader {
     uint16_t age;
     uint16_t flags;
     Obj *forwarding;      // non-NULL if moved
+    const TypeInfo *type;
 } ObjHeader;
 
+typedef struct TypeInfo {
+    uint16_t field_count;
+    uint16_t pointer_count;
+    const uint8_t *pointer_bitmap;
+} TypeInfo;
+
 /* Full object definition */
 struct Obj {
     ObjHeader header;