Debugged mark()

Co-authored-by: ValterMiari <ValterMiari@users.noreply.github.com>

src/GC/todo.md

@@ -6,16 +6,13 @@ Goal for next week (17/2):
 - Functioning garbage collector
 - Test it with valgrind
 
-TODO:
+## GC TODO:
 - Merge to main branch
-
-## Algorithm
-
-Potential algorithms:
-- mark & sweep
+- Don't empty m_free_chunks, reuse in a better way **Victor fixes this**
 
 ## Tests TODO
 ### Library linking
+**Victor fixes this**
 Compile the GC lib and a test separately, link them together
 and evalutate the following:
 
@@ -24,3 +21,17 @@ and evalutate the following:
     __builtin_return_address(0)
     __builtin_return_address(1)
 
+### GC Init and __b_f_a
+1. Save the first stack fram globally as the stack start
+2. For each call to collect, save the prev stack frame as the stack end
+3. Scan through the span
+
+    gc_init()
+        global stack_end = __builtin_frame_address(1)
+
+    collect()
+        global stack_start = __builtin_frame_address(1)
+
+    sweep()
+        for all addr in range(stack_end, stack_start)
+            mark if chunk