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This commit is contained in:
Justin Ethier 2015-10-29 22:39:09 -04:00
parent fee0675fa2
commit fc83ee260b
1 changed files with 5 additions and 2 deletions
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7
gc.c
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@ -545,8 +545,6 @@ void gc_mark_black(object obj)
// Gray any child objects // Gray any child objects
// Note we probably should use some form of atomics/synchronization // Note we probably should use some form of atomics/synchronization
// for cons and vector types, as these pointers could change. // for cons and vector types, as these pointers could change.
// Also this is a case for adding the stack/heap bit, because these could
// be stack objects if a thread issued an update.
switch(type_of(obj)) { switch(type_of(obj)) {
case cons_tag: { case cons_tag: {
gc_collector_mark_gray(car(obj)); gc_collector_mark_gray(car(obj));
@ -592,6 +590,11 @@ void gc_mark_black(object obj)
void gc_collector_mark_gray(object obj) void gc_collector_mark_gray(object obj)
{ {
// "Color" objects gray by adding them to the mark stack for further processing.
//
// Note that stack objects are always colored red during creation, so
// they should never be added to the mark stack. Which would be bad because it
// could lead to stack corruption.
if (is_object_type(obj) && mark(obj) == gc_color_clear) { if (is_object_type(obj) && mark(obj) == gc_color_clear) {
mark_stack = vpbuffer_add(mark_stack, &mark_stack_len, mark_stack_i++, obj); mark_stack = vpbuffer_add(mark_stack, &mark_stack_len, mark_stack_i++, obj);
} }