namespace factor {
+// gc_info should be kept in sync with:
+// basis/compiler/codegen/gc-maps/gc-maps.factor
+// basis/vm/vm.factor
struct gc_info {
- u32 scrub_d_count;
- u32 scrub_r_count;
- u32 gc_root_count;
- u32 derived_root_count;
- u32 return_address_count;
+ uint32_t gc_root_count;
+ uint32_t derived_root_count;
+ uint32_t return_address_count;
cell callsite_bitmap_size() {
- return scrub_d_count + scrub_r_count + gc_root_count;
+ return gc_root_count;
}
cell total_bitmap_size() {
cell total_bitmap_bytes() { return ((total_bitmap_size() + 7) / 8); }
- u32* return_addresses() { return (u32*)this - return_address_count; }
+ uint32_t* return_addresses() {
+ return (uint32_t*)this - return_address_count;
+ }
- u32* base_pointer_map() {
+ uint32_t* base_pointer_map() {
return return_addresses() - return_address_count * derived_root_count;
}
- u8* gc_info_bitmap() {
- return (u8*)base_pointer_map() - total_bitmap_bytes();
+ uint8_t* gc_info_bitmap() {
+ return (uint8_t*)base_pointer_map() - total_bitmap_bytes();
}
- cell callsite_scrub_d(cell index) { return index * scrub_d_count; }
-
- cell callsite_scrub_r(cell index) {
- return return_address_count * scrub_d_count + index * scrub_r_count;
- }
cell callsite_gc_roots(cell index) {
- return return_address_count * scrub_d_count +
- return_address_count * scrub_r_count + index * gc_root_count;
+ return index * gc_root_count;
}
- u32 lookup_base_pointer(cell index, cell derived_root) {
+ uint32_t lookup_base_pointer(cell index, cell derived_root) {
return base_pointer_map()[index * derived_root_count + derived_root];
}
- cell return_address_index(cell return_address);
+ cell return_address_index(cell return_address) {
+ uint32_t* return_address_array = return_addresses();
+
+ for (cell i = 0; i < return_address_count; i++) {
+ if (return_address == return_address_array[i])
+ return i;
+ }
+
+ return (cell)-1;
+ }
};
}