/* -----------------------------------------------------------------------------
- * $Id: Storage.c,v 1.71 2002/12/11 15:36:54 simonmar Exp $
+ * $Id: Storage.c,v 1.84 2004/08/13 13:11:01 simonmar Exp $
*
* (c) The GHC Team, 1998-1999
*
#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>
-#ifdef darwin_TARGET_OS
-#include <mach-o/getsect.h>
-unsigned long macho_etext = 0;
-unsigned long macho_edata = 0;
-
-static void macosx_get_memory_layout(void)
-{
- struct segment_command *seg;
-
- seg = getsegbyname("__TEXT");
- macho_etext = seg->vmaddr + seg->vmsize;
- seg = getsegbyname("__DATA");
- macho_edata = seg->vmaddr + seg->vmsize;
-}
-#endif
-
StgClosure *caf_list = NULL;
bdescr *small_alloc_list; /* allocate()d small objects */
StgPtr alloc_Hp = NULL; /* next free byte in small_alloc_list */
StgPtr alloc_HpLim = NULL; /* end of block at small_alloc_list */
-generation *generations; /* all the generations */
-generation *g0; /* generation 0, for convenience */
-generation *oldest_gen; /* oldest generation, for convenience */
-step *g0s0; /* generation 0, step 0, for convenience */
+generation *generations = NULL; /* all the generations */
+generation *g0 = NULL; /* generation 0, for convenience */
+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
step *stp;
generation *gen;
-#if defined(darwin_TARGET_OS)
- macosx_get_memory_layout();
-#endif
-
- /* 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 (generations != NULL) {
+ // multi-init protection
+ 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));
+
if (RtsFlags.GcFlags.maxHeapSize != 0 &&
RtsFlags.GcFlags.heapSizeSuggestion >
RtsFlags.GcFlags.maxHeapSize) {
initBlockAllocator();
#if defined(SMP)
- initCondition(&sm_mutex);
+ initMutex(&sm_mutex);
#endif
/* allocate generation info array */
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;
/* 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());
}
*/
ACQUIRE_SM_LOCK;
- if (0 /*TODO: is_dynamically_loaded_rwdata_ptr((StgPtr)caf)*/) {
- ((StgIndStatic *)caf)->saved_info = (StgInfoTable *)caf->header.info;
- ((StgIndStatic *)caf)->static_link = caf_list;
- caf_list = caf;
- } else {
- ((StgIndStatic *)caf)->saved_info = NULL;
- ((StgMutClosure *)caf)->mut_link = oldest_gen->mut_once_list;
- oldest_gen->mut_once_list = (StgMutClosure *)caf;
- }
+ ((StgIndStatic *)caf)->saved_info = NULL;
+ ((StgMutClosure *)caf)->mut_link = oldest_gen->mut_once_list;
+ oldest_gen->mut_once_list = (StgMutClosure *)caf;
RELEASE_SM_LOCK;
#endif /* PAR */
}
+// An alternate version of newCaf which is used for dynamically loaded
+// 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.
+//
+// The linker hackily arranges that references to newCaf from dynamic
+// code end up pointing to newDynCAF.
+void
+newDynCAF(StgClosure *caf)
+{
+ ACQUIRE_SM_LOCK;
+
+ ((StgIndStatic *)caf)->saved_info = (StgInfoTable *)caf->header.info;
+ ((StgIndStatic *)caf)->static_link = caf_list;
+ caf_list = caf;
+
+ RELEASE_SM_LOCK;
+}
+
/* -----------------------------------------------------------------------------
Nursery management.
-------------------------------------------------------------------------- */
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;
- }
- }
+ 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;
/* Set the back links to be equal to the Capability,
* so we can do slightly better informed locking.
*/
+ for (bd = cap->r.rNursery; bd != NULL; bd = bd->link) {
+ bd->u.back = (bdescr *)cap;
+ }
}
#else /* SMP */
g0s0->blocks = allocNursery(NULL, RtsFlags.GcFlags.minAllocAreaSize);
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;
- /* 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.
- */
+ bd->free = bd->start + n;
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 *
#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
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