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Fix compaction for generic ivars

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When generic instance variable has a shape, it is marked movable. If it
it transitions to too complex, it needs to update references otherwise
it may have incorrect references.
This commit is contained in:
Peter Zhu 2023-11-24 10:25:06 -05:00
parent e201b81f79
commit 269c705f93
4 changed files with 32 additions and 6 deletions
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10
gc.c
View File

@ -7255,7 +7255,7 @@ gc_mark_children(rb_objspace_t *objspace, VALUE obj)
gc_mark_set_parent(objspace, obj);
if (FL_TEST(obj, FL_EXIVAR)) {
rb_mark_and_update_generic_ivar(obj);
rb_mark_generic_ivar(obj);
}
switch (BUILTIN_TYPE(obj)) {
@ -10249,6 +10249,12 @@ gc_ref_update_table_values_only(rb_objspace_t *objspace, st_table *tbl)
}
}
void
rb_gc_ref_update_table_values_only(st_table *tbl)
{
gc_ref_update_table_values_only(&rb_objspace, tbl);
}
static void
gc_update_table_refs(rb_objspace_t * objspace, st_table *tbl)
{
@ -10623,7 +10629,7 @@ gc_update_object_references(rb_objspace_t *objspace, VALUE obj)
gc_report(4, objspace, "update-refs: %p ->\n", (void *)obj);
if (FL_TEST(obj, FL_EXIVAR)) {
rb_mark_and_update_generic_ivar(obj);
rb_ref_update_generic_ivar(obj);
}
switch (BUILTIN_TYPE(obj)) {

2
internal/gc.h
View File

@ -250,6 +250,8 @@ void rb_gc_mark_and_move(VALUE *ptr);
void rb_gc_mark_weak(VALUE *ptr);
void rb_gc_remove_weak(VALUE parent_obj, VALUE *ptr);
void rb_gc_ref_update_table_values_only(st_table *tbl);
#define rb_gc_mark_and_move_ptr(ptr) do { \
VALUE _obj = (VALUE)*(ptr); \
rb_gc_mark_and_move(&_obj); \

3
internal/variable.h
View File

@ -53,7 +53,8 @@ void rb_evict_ivars_to_hash(VALUE obj);
RUBY_SYMBOL_EXPORT_BEGIN
/* variable.c (export) */
void rb_mark_and_update_generic_ivar(VALUE);
void rb_mark_generic_ivar(VALUE obj);
void rb_ref_update_generic_ivar(VALUE);
void rb_mv_generic_ivar(VALUE src, VALUE dst);
VALUE rb_const_missing(VALUE klass, VALUE name);
int rb_class_ivar_set(VALUE klass, ID vid, VALUE value);

23
variable.c
View File

@ -1066,17 +1066,34 @@ gen_ivtbl_resize(struct gen_ivtbl *old, uint32_t n)
}
void
rb_mark_and_update_generic_ivar(VALUE obj)
rb_mark_generic_ivar(VALUE obj)
{
struct gen_ivtbl *ivtbl;
if (rb_gen_ivtbl_get(obj, 0, &ivtbl)) {
if (rb_shape_obj_too_complex(obj)) {
rb_mark_tbl(ivtbl->as.complex.table);
rb_mark_tbl_no_pin(ivtbl->as.complex.table);
}
else {
for (uint32_t i = 0; i < ivtbl->as.shape.numiv; i++) {
rb_gc_mark_and_move(&ivtbl->as.shape.ivptr[i]);
rb_gc_mark_movable(ivtbl->as.shape.ivptr[i]);
}
}
}
}
void
rb_ref_update_generic_ivar(VALUE obj)
{
struct gen_ivtbl *ivtbl;
if (rb_gen_ivtbl_get(obj, 0, &ivtbl)) {
if (rb_shape_obj_too_complex(obj)) {
rb_gc_ref_update_table_values_only(ivtbl->as.complex.table);
}
else {
for (uint32_t i = 0; i < ivtbl->as.shape.numiv; i++) {
ivtbl->as.shape.ivptr[i] = rb_gc_location(ivtbl->as.shape.ivptr[i]);
}
}
}