Fcalva/cyclone
1
0
Fork 0
mirror of https://github.com/justinethier/cyclone.git synced 2025-05-19 05:39:17 +02:00
Code Issues Projects Releases Packages Wiki Activity Actions

Speed up object mutation

Browse source 
No need to track for minor GC purposes unless we are mutating a heap variable to point to a stack var.
This commit is contained in:
Justin Ethier 2019-09-26 10:07:10 -04:00
parent b829abadfb
commit 51919cfdf8
1 changed files with 11 additions and 3 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

14
runtime.c
View file

@ -477,15 +477,23 @@ void Cyc_set_globals_changed(gc_thread_data *thd)
/* Mutation table functions
*
* Keep track of mutations (EG: set-car!) so that new
* values are transported to the heap during GC.
* Keep track of mutations (EG: set-car!) so we can avoid having heap
* objects that point to old stack objects. We need to transport any
* such stack objects to the heap during minor GC.
*
* Note these functions and underlying data structure are only used by
* the calling thread, so locking is not required.
*/
void add_mutation(void *data, object var, int index, object value)
{
gc_thread_data *thd = (gc_thread_data *) data;
if (is_object_type(value)) {
// No need to track for minor GC purposes unless we are mutating
// a heap variable to point to a stack var.
//
// If var is on stack we'll get it anyway in minor GC,
// and if value is on heap we don't care (no chance of heap pointing to nursery)
if (!gc_is_stack_obj(data, var) && gc_is_stack_obj(data, value)) {
thd->mutations = vpbuffer_add(thd->mutations,
&(thd->mutation_buflen),
thd->mutation_count,