- /* if valuable work: shift inside the pool */
- if ( closure_SHOULD_SPARK(spark) ) {
- elements[botInd] = spark; // keep entry (new address)
- botInd++;
- n++;
- } else {
- pruned_sparks++; // discard spark
+ // We have to be careful here: in the parallel GC, another
+ // thread might evacuate this closure while we're looking at it,
+ // so grab the info pointer just once.
+ info = spark->header.info;
+ if (IS_FORWARDING_PTR(info)) {
+ tmp = (StgClosure*)UN_FORWARDING_PTR(info);
+ /* if valuable work: shift inside the pool */
+ if (closure_SHOULD_SPARK(tmp)) {
+ elements[botInd] = tmp; // keep entry (new address)
+ botInd++;
+ n++;
+ } else {
+ pruned_sparks++; // discard spark
+ cap->sparks_pruned++;
+ }
+ } else {
+ if (!(closure_flags[INFO_PTR_TO_STRUCT(info)->type] & _NS)) {
+ elements[botInd] = spark; // keep entry (new address)
+ evac (user, &elements[botInd]);
+ botInd++;
+ n++;
+ } else {
+ pruned_sparks++; // discard spark
+ cap->sparks_pruned++;
+ }