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Added TODO

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This commit is contained in:
Justin Ethier 2015-12-01 00:22:54 -05:00
parent 7276eea773
commit ae46e39c45
1 changed files with 6 additions and 0 deletions
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6
gc.c
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@ -932,6 +932,12 @@ void gc_collector_trace()
while (m->last_read < m->last_write) { while (m->last_read < m->last_write) {
clean = 0; clean = 0;
(m->last_read)++; (m->last_read)++;
TODO: I think there is an off-by-one error here. inspect last read/write.
is the code going one too many? per paper it is not, but based on
logs it looks like it is reading past end of buffer. (ie, errors always seem
to be on the last object traced, and checking the history, an object
incorrectly marked at position X can be seen to have been stored at position
X in a previous collection.
printf("gc_mark_black mark buffer %p, last_read = %d last_write = %d\n", printf("gc_mark_black mark buffer %p, last_read = %d last_write = %d\n",
(m->mark_buffer)[m->last_read], (m->mark_buffer)[m->last_read],
m->last_read, m->last_write); m->last_read, m->last_write);