/* -----------------------------------------------------------------------------
- * $Id: Storage.c,v 1.75 2003/01/29 10:28:56 simonmar Exp $
*
- * (c) The GHC Team, 1998-1999
+ * (c) The GHC Team, 1998-2004
*
* Storage manager front end
*
#include "Weak.h"
#include "Sanity.h"
#include "Arena.h"
-
+#include "OSThreads.h"
+#include "Capability.h"
#include "Storage.h"
#include "Schedule.h"
-#include "OSThreads.h"
-#include "StoragePriv.h"
-
#include "RetainerProfile.h" // for counting memory blocks (memInventory)
#include <stdlib.h>
#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 */
generation *oldest_gen = NULL; /* oldest generation, for convenience */
step *g0s0 = NULL; /* generation 0, step 0, for convenience */
-lnat total_allocated = 0; /* total memory allocated during run */
+ullong total_allocated = 0; /* total memory allocated during run */
/*
* Storage manager mutex: protects all the above state from
static void *stgReallocForGMP (void *ptr, size_t old_size, size_t new_size);
static void stgDeallocForGMP (void *ptr, size_t size);
+/*
+ * Storage manager mutex
+ */
+#if defined(SMP)
+extern Mutex sm_mutex;
+#define ACQUIRE_SM_LOCK ACQUIRE_LOCK(&sm_mutex)
+#define RELEASE_SM_LOCK RELEASE_LOCK(&sm_mutex)
+#else
+#define ACQUIRE_SM_LOCK
+#define RELEASE_SM_LOCK
+#endif
+
void
initStorage( void )
{
return;
}
- /* Sanity check to make sure the LOOKS_LIKE_ macros appear to be
- * doing something reasonable.
- */
- ASSERT(LOOKS_LIKE_INFO_PTR(&stg_BLACKHOLE_info));
- ASSERT(LOOKS_LIKE_CLOSURE_PTR(&stg_dummy_ret_closure));
- ASSERT(!HEAP_ALLOCED(&stg_dummy_ret_closure));
-
+ /* Sanity check to make sure the LOOKS_LIKE_ macros appear to be
+ * doing something reasonable.
+ */
+ ASSERT(LOOKS_LIKE_INFO_PTR(&stg_BLACKHOLE_info));
+ ASSERT(LOOKS_LIKE_CLOSURE_PTR(&stg_dummy_ret_closure));
+ ASSERT(!HEAP_ALLOCED(&stg_dummy_ret_closure));
+
if (RtsFlags.GcFlags.maxHeapSize != 0 &&
RtsFlags.GcFlags.heapSizeSuggestion >
RtsFlags.GcFlags.maxHeapSize) {
if (RtsFlags.GcFlags.maxHeapSize != 0 &&
RtsFlags.GcFlags.minAllocAreaSize >
RtsFlags.GcFlags.maxHeapSize) {
- prog_belch("maximum heap size (-M) is smaller than minimum alloc area size (-A)");
+ errorBelch("maximum heap size (-M) is smaller than minimum alloc area size (-A)");
exit(1);
}
initBlockAllocator();
#if defined(SMP)
- initCondition(&sm_mutex);
+ initMutex(&sm_mutex);
#endif
/* allocate generation info array */
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;
stp = &generations[g].steps[s];
stp->no = s;
stp->blocks = NULL;
+ stp->n_to_blocks = 0;
stp->n_blocks = 0;
stp->gen = &generations[g];
stp->gen_no = g;
/* The oldest generation has one step and it is compacted. */
if (RtsFlags.GcFlags.compact) {
if (RtsFlags.GcFlags.generations == 1) {
- belch("WARNING: compaction is incompatible with -G1; disabled");
+ errorBelch("WARNING: compaction is incompatible with -G1; disabled");
} else {
oldest_gen->steps[0].is_compacted = 1;
}
weak_ptr_list = NULL;
caf_list = NULL;
+ revertible_caf_list = NULL;
/* initialise the allocate() interface */
small_alloc_list = NULL;
/* Tell GNU multi-precision pkg about our custom alloc functions */
mp_set_memory_functions(stgAllocForGMP, stgReallocForGMP, stgDeallocForGMP);
-#if defined(SMP)
- initMutex(&sm_mutex);
-#endif
-
IF_DEBUG(gc, statDescribeGens());
}
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
/* If we are PAR or DIST then we never forget a CAF */
{ globalAddr *newGA;
- //belch("<##> Globalising CAF %08x %s",caf,info_type(caf));
+ //debugBelch("<##> Globalising CAF %08x %s",caf,info_type(caf));
newGA=makeGlobal(caf,rtsTrue); /*given full weight*/
ASSERT(newGA);
}
// 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;
}
allocNurseries( void )
{
#ifdef SMP
- {
- Capability *cap;
- bdescr *bd;
-
- g0s0->blocks = NULL;
- g0s0->n_blocks = 0;
- for (cap = free_capabilities; cap != NULL; cap = cap->link) {
- cap->r.rNursery = allocNursery(NULL, RtsFlags.GcFlags.minAllocAreaSize);
- cap->r.rCurrentNursery = cap->r.rNursery;
- for (bd = cap->r.rNursery; bd != NULL; bd = bd->link) {
- bd->u.back = (bdescr *)cap;
- }
- }
- /* Set the back links to be equal to the Capability,
- * so we can do slightly better informed locking.
- */
+ Capability *cap;
+
+ g0s0->blocks = NULL;
+ g0s0->n_blocks = 0;
+ for (cap = free_capabilities; cap != NULL; cap = cap->link) {
+ cap->r.rNursery = allocNursery(NULL, RtsFlags.GcFlags.minAllocAreaSize);
+ cap->r.rCurrentNursery = cap->r.rNursery;
}
#else /* SMP */
g0s0->blocks = allocNursery(NULL, RtsFlags.GcFlags.minAllocAreaSize);
resetNurseries( void )
{
bdescr *bd;
-#ifdef SMP
Capability *cap;
-
- /* All tasks must be stopped */
- ASSERT(n_free_capabilities == RtsFlags.ParFlags.nNodes);
- for (cap = free_capabilities; cap != NULL; cap = cap->link) {
+#ifdef SMP
+ /* All tasks must be stopped */
+ ASSERT(rts_n_free_capabilities == RtsFlags.ParFlags.nNodes);
+ for (cap = free_capabilities; cap != NULL; cap = cap->link)
+#else
+ cap = &MainCapability;
+#endif
+ {
for (bd = cap->r.rNursery; bd; bd = bd->link) {
bd->free = bd->start;
ASSERT(bd->gen_no == 0);
}
cap->r.rCurrentNursery = cap->r.rNursery;
}
-#else
- for (bd = g0s0->blocks; bd; bd = bd->link) {
- bd->free = bd->start;
- ASSERT(bd->gen_no == 0);
- ASSERT(bd->step == g0s0);
- IF_DEBUG(sanity,memset(bd->start, 0xaa, BLOCK_SIZE));
- }
- MainCapability.r.rNursery = g0s0->blocks;
- MainCapability.r.rCurrentNursery = g0s0->blocks;
-#endif
}
bdescr *
}
else if (nursery_blocks < blocks) {
- IF_DEBUG(gc, fprintf(stderr, "Increasing size of nursery to %d blocks\n",
+ IF_DEBUG(gc, debugBelch("Increasing size of nursery to %d blocks\n",
blocks));
g0s0->blocks = allocNursery(g0s0->blocks, blocks-nursery_blocks);
}
else {
bdescr *next_bd;
- IF_DEBUG(gc, fprintf(stderr, "Decreasing size of nursery to %d blocks\n",
+ IF_DEBUG(gc, debugBelch("Decreasing size of nursery to %d blocks\n",
blocks));
bd = g0s0->blocks;
nat req_blocks = (lnat)BLOCK_ROUND_UP(n*sizeof(W_)) / BLOCK_SIZE;
bd = allocGroup(req_blocks);
dbl_link_onto(bd, &g0s0->large_objects);
+ g0s0->n_large_blocks += req_blocks;
bd->gen_no = 0;
bd->step = g0s0;
bd->flags = BF_LARGE;
bd->free = bd->start + n;
- /* don't add these blocks to alloc_blocks, since we're assuming
- * that large objects are likely to remain live for quite a while
- * (eg. running threads), so garbage collecting early won't make
- * much difference.
- */
alloc_blocks += req_blocks;
RELEASE_SM_LOCK;
return bd->start;
StgPtr p;
bdescr *bd = pinned_object_block;
- ACQUIRE_SM_LOCK;
-
- TICK_ALLOC_HEAP_NOCTR(n);
- CCS_ALLOC(CCCS,n);
-
// If the request is for a large object, then allocate()
// will give us a pinned object anyway.
if (n >= LARGE_OBJECT_THRESHOLD/sizeof(W_)) {
- RELEASE_SM_LOCK;
return allocate(n);
}
+ ACQUIRE_SM_LOCK;
+
+ TICK_ALLOC_HEAP_NOCTR(n);
+ CCS_ALLOC(CCCS,n);
+
// we always return 8-byte aligned memory. bd->free must be
// 8-byte aligned to begin with, so we just round up n to
// the nearest multiple of 8 bytes.
dbl_link_onto(bd, &g0s0->large_objects);
bd->gen_no = 0;
bd->step = g0s0;
- bd->flags = BF_LARGE;
+ bd->flags = BF_PINNED | BF_LARGE;
bd->free = bd->start;
alloc_blocks++;
}
SET_ARR_HDR(arr, &stg_ARR_WORDS_info, CCCS, data_size_in_words);
/* and return a ptr to the goods inside the array */
- return(BYTE_ARR_CTS(arr));
+ return arr->payload;
}
static void *
/* ASSERT(n_free_capabilities == RtsFlags.ParFlags.nNodes); */
allocated =
- n_free_capabilities * RtsFlags.GcFlags.minAllocAreaSize * BLOCK_SIZE_W
+ rts_n_free_capabilities * RtsFlags.GcFlags.minAllocAreaSize * BLOCK_SIZE_W
+ allocated_bytes();
for (cap = free_capabilities; cap != NULL; cap = cap->link) {
/* 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() */
#ifdef PROFILING
if (RtsFlags.ProfFlags.doHeapProfile == HEAP_BY_RETAINER) {
- for (bd = firstStack; bd != NULL; bd = bd->link)
- total_blocks += bd->blocks;
+ total_blocks += retainerStackBlocks();
}
#endif
if (total_blocks + free_blocks != mblocks_allocated *
BLOCKS_PER_MBLOCK) {
- fprintf(stderr, "Blocks: %ld live + %ld free = %ld total (%ld around)\n",
+ debugBelch("Blocks: %ld live + %ld free = %ld total (%ld around)\n",
total_blocks, free_blocks, total_blocks + free_blocks,
mblocks_allocated * BLOCKS_PER_MBLOCK);
}
checkChain(generations[g].steps[s].large_objects);
if (g > 0) {
checkMutableList(generations[g].mut_list, g);
- checkMutOnceList(generations[g].mut_once_list, g);
}
}
}