#include <string.h>
StgClosure *caf_list = NULL;
+StgClosure *revertible_caf_list = NULL;
+rtsBool keepCAFs;
bdescr *small_alloc_list; /* allocate()d small objects */
bdescr *pinned_object_block; /* allocate pinned objects into this block */
for(g = 0; g < RtsFlags.GcFlags.generations; g++) {
gen = &generations[g];
gen->no = g;
- gen->mut_list = END_MUT_LIST;
- gen->mut_once_list = END_MUT_LIST;
+ gen->mut_list = allocBlock();
gen->collections = 0;
gen->failed_promotions = 0;
gen->max_blocks = 0;
weak_ptr_list = NULL;
caf_list = NULL;
+ revertible_caf_list = NULL;
/* initialise the allocate() interface */
small_alloc_list = NULL;
void
newCAF(StgClosure* caf)
{
- /* Put this CAF on the mutable list for the old generation.
- * This is a HACK - the IND_STATIC closure doesn't really have
- * a mut_link field, but we pretend it has - in fact we re-use
- * the STATIC_LINK field for the time being, because when we
- * come to do a major GC we won't need the mut_link field
- * any more and can use it as a STATIC_LINK.
- */
ACQUIRE_SM_LOCK;
- ((StgIndStatic *)caf)->saved_info = NULL;
- ((StgMutClosure *)caf)->mut_link = oldest_gen->mut_once_list;
- oldest_gen->mut_once_list = (StgMutClosure *)caf;
-
+ if(keepCAFs)
+ {
+ // HACK:
+ // If we are in GHCi _and_ we are using dynamic libraries,
+ // then we can't redirect newCAF calls to newDynCAF (see below),
+ // so we make newCAF behave almost like newDynCAF.
+ // The dynamic libraries might be used by both the interpreted
+ // program and GHCi itself, so they must not be reverted.
+ // This also means that in GHCi with dynamic libraries, CAFs are not
+ // garbage collected. If this turns out to be a problem, we could
+ // do another hack here and do an address range test on caf to figure
+ // out whether it is from a dynamic library.
+ ((StgIndStatic *)caf)->saved_info = (StgInfoTable *)caf->header.info;
+ ((StgIndStatic *)caf)->static_link = caf_list;
+ caf_list = caf;
+ }
+ else
+ {
+ /* Put this CAF on the mutable list for the old generation.
+ * This is a HACK - the IND_STATIC closure doesn't really have
+ * a mut_link field, but we pretend it has - in fact we re-use
+ * the STATIC_LINK field for the time being, because when we
+ * come to do a major GC we won't need the mut_link field
+ * any more and can use it as a STATIC_LINK.
+ */
+ ((StgIndStatic *)caf)->saved_info = NULL;
+ recordMutableGen(caf, oldest_gen);
+ }
+
RELEASE_SM_LOCK;
#ifdef PAR
// object code in GHCi. In this case we want to retain *all* CAFs in
// the object code, because they might be demanded at any time from an
// expression evaluated on the command line.
+// Also, GHCi might want to revert CAFs, so we add these to the
+// revertible_caf_list.
//
// The linker hackily arranges that references to newCaf from dynamic
// code end up pointing to newDynCAF.
ACQUIRE_SM_LOCK;
((StgIndStatic *)caf)->saved_info = (StgInfoTable *)caf->header.info;
- ((StgIndStatic *)caf)->static_link = caf_list;
- caf_list = caf;
+ ((StgIndStatic *)caf)->static_link = revertible_caf_list;
+ revertible_caf_list = caf;
RELEASE_SM_LOCK;
}
/* count the blocks we current have */
for (g = 0; g < RtsFlags.GcFlags.generations; g++) {
- for (s = 0; s < generations[g].n_steps; s++) {
- stp = &generations[g].steps[s];
- total_blocks += stp->n_blocks;
- if (RtsFlags.GcFlags.generations == 1) {
- /* two-space collector has a to-space too :-) */
- total_blocks += g0s0->n_to_blocks;
+ for (bd = generations[g].mut_list; bd != NULL; bd = bd->link) {
+ total_blocks += bd->blocks;
}
- for (bd = stp->large_objects; bd; bd = bd->link) {
- total_blocks += bd->blocks;
- /* hack for megablock groups: they have an extra block or two in
- the second and subsequent megablocks where the block
- descriptors would normally go.
- */
- if (bd->blocks > BLOCKS_PER_MBLOCK) {
- total_blocks -= (MBLOCK_SIZE / BLOCK_SIZE - BLOCKS_PER_MBLOCK)
- * (bd->blocks/(MBLOCK_SIZE/BLOCK_SIZE));
- }
+ for (s = 0; s < generations[g].n_steps; s++) {
+ stp = &generations[g].steps[s];
+ total_blocks += stp->n_blocks;
+ if (RtsFlags.GcFlags.generations == 1) {
+ /* two-space collector has a to-space too :-) */
+ total_blocks += g0s0->n_to_blocks;
+ }
+ for (bd = stp->large_objects; bd; bd = bd->link) {
+ total_blocks += bd->blocks;
+ /* hack for megablock groups: they have an extra block or two in
+ the second and subsequent megablocks where the block
+ descriptors would normally go.
+ */
+ if (bd->blocks > BLOCKS_PER_MBLOCK) {
+ total_blocks -= (MBLOCK_SIZE / BLOCK_SIZE - BLOCKS_PER_MBLOCK)
+ * (bd->blocks/(MBLOCK_SIZE/BLOCK_SIZE));
+ }
+ }
}
- }
}
/* any blocks held by allocate() */
checkChain(generations[g].steps[s].large_objects);
if (g > 0) {
checkMutableList(generations[g].mut_list, g);
- checkMutOnceList(generations[g].mut_once_list, g);
}
}
}