Reverting change to segment marking

cksystemsteaching · Sep 10, 2023 · 27027dd · 27027dd
1 parent de85744
commit 27027dd
Showing 1 changed file with 3 additions and 4 deletions.
diff --git a/selfie.c b/selfie.c
@@ -10956,13 +10956,12 @@ void mark_object_selfie(uint64_t* context, uint64_t gc_address) {
 }
 
 void mark_segment(uint64_t* context, uint64_t segment_start, uint64_t segment_end) {
- // assert: segment is not heap, segment_start >= GC_WORDSIZE
+ // assert: segment is not heap
 
- // prevent 32-bit overflow by subtracting GC_WORDSIZE
+ // prevent (32-bit) overflow by subtracting GC_WORDSIZE from index
  segment_start = segment_start - GC_WORDSIZE;
- segment_end = segment_end - GC_WORDSIZE;
 
- while (segment_start < segment_end) {
+ while (segment_start < segment_end - GC_WORDSIZE) {
  // undo GC_WORDSIZE index offset before marking address
  mark_object(context, segment_start + GC_WORDSIZE);