/* "Bag-of-pages" zone garbage collector for the GNU compiler.
- Copyright (C) 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2007, 2008
- Free Software Foundation, Inc.
+ Copyright (C) 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2007, 2008,
+ 2010 Free Software Foundation, Inc.
Contributed by Richard Henderson (rth@redhat.com) and Daniel Berlin
(dberlin@dberlin.org). Rewritten by Daniel Jacobowitz
#include "rtl.h"
#include "tm_p.h"
#include "toplev.h"
-#include "varray.h"
#include "flags.h"
#include "ggc.h"
+#include "ggc-internal.h"
#include "timevar.h"
#include "params.h"
#include "bitmap.h"
+#include "plugin.h"
/* Prefer MAP_ANON(YMOUS) to /dev/zero, since we don't need to keep a
file open. Prefer either to valloc. */
#ifdef GATHER_STATISTICS
struct
{
- /* Total memory allocated with ggc_alloc. */
+ /* Total GC-allocated memory. */
unsigned long long total_allocated;
- /* Total overhead for memory to be allocated with ggc_alloc. */
+ /* Total overhead for GC-allocated memory. */
unsigned long long total_overhead;
/* Total allocations and overhead for sizes less than 32, 64 and 128.
These sizes are interesting because they are typical cache line
sizes. */
-
+
unsigned long long total_allocated_under32;
unsigned long long total_overhead_under32;
-
+
unsigned long long total_allocated_under64;
unsigned long long total_overhead_under64;
-
+
unsigned long long total_allocated_under128;
unsigned long long total_overhead_under128;
} stats;
zone->bytes_mapped += size;
/* Pretend we don't have access to the allocated pages. We'll enable
- access to smaller pieces of the area in ggc_alloc. Discard the
+ access to smaller pieces of the area in ggc_internal_alloc. Discard the
handle to avoid handle leak. */
VALGRIND_DISCARD (VALGRIND_MAKE_MEM_NOACCESS (page, size));
/* Allocate a chunk of memory of at least ORIG_SIZE bytes, in ZONE. */
void *
-ggc_alloc_zone_stat (size_t orig_size, struct alloc_zone *zone
- MEM_STAT_DECL)
+ggc_internal_alloc_zone_stat (size_t orig_size, struct alloc_zone *zone
+ MEM_STAT_DECL)
{
size_t bin;
size_t csize;
/* Keep track of how many bytes are being allocated. This
information is used in deciding when to collect. */
zone->allocated += size;
-
+
timevar_ggc_mem_total += size;
#ifdef GATHER_STATISTICS
return result;
}
+#define ggc_internal_alloc_zone_pass_stat(s,z) \
+ ggc_internal_alloc_zone_stat (s,z PASS_MEM_STAT)
+
+void *
+ggc_internal_cleared_alloc_zone_stat (size_t orig_size,
+ struct alloc_zone *zone MEM_STAT_DECL)
+{
+ void * result = ggc_internal_alloc_zone_pass_stat (orig_size, zone);
+ memset (result, 0, orig_size);
+ return result;
+}
+
+
/* Allocate a SIZE of chunk memory of GTE type, into an appropriate zone
for that type. */
switch (gte)
{
case gt_ggc_e_14lang_tree_node:
- return ggc_alloc_zone_pass_stat (size, &tree_zone);
+ return ggc_internal_alloc_zone_pass_stat (size, &tree_zone);
case gt_ggc_e_7rtx_def:
- return ggc_alloc_zone_pass_stat (size, &rtl_zone);
+ return ggc_internal_alloc_zone_pass_stat (size, &rtl_zone);
case gt_ggc_e_9rtvec_def:
- return ggc_alloc_zone_pass_stat (size, &rtl_zone);
+ return ggc_internal_alloc_zone_pass_stat (size, &rtl_zone);
default:
- return ggc_alloc_zone_pass_stat (size, &main_zone);
+ return ggc_internal_alloc_zone_pass_stat (size, &main_zone);
}
}
-/* Normal ggc_alloc simply allocates into the main zone. */
+/* Normal GC allocation simply allocates into the main zone. */
void *
-ggc_alloc_stat (size_t size MEM_STAT_DECL)
+ggc_internal_alloc_stat (size_t size MEM_STAT_DECL)
{
- return ggc_alloc_zone_pass_stat (size, &main_zone);
+ return ggc_internal_alloc_zone_pass_stat (size, &main_zone);
}
/* Poison the chunk. */
#ifdef ENABLE_GC_CHECKING
-#define poison_region(PTR, SIZE) \
- memset ((PTR), 0xa5, (SIZE))
+#define poison_region(PTR, SIZE) \
+ do { \
+ VALGRIND_DISCARD (VALGRIND_MAKE_MEM_UNDEFINED ((PTR), (SIZE))); \
+ memset ((PTR), 0xa5, (SIZE)); \
+ VALGRIND_DISCARD (VALGRIND_MAKE_MEM_NOACCESS ((PTR), (SIZE))); \
+ } while (0)
#else
#define poison_region(PTR, SIZE)
#endif
offset = (ptr - pch_zone.page) / BYTES_PER_MARK_BIT;
mark_word = offset / (8 * sizeof (mark_type));
mark_bit = offset % (8 * sizeof (mark_type));
-
+
if (pch_zone.mark_bits[mark_word] & (1 << mark_bit))
return 1;
pch_zone.mark_bits[mark_word] |= (1 << mark_bit);
offset = (ptr - pch_zone.page) / BYTES_PER_MARK_BIT;
mark_word = offset / (8 * sizeof (mark_type));
mark_bit = offset % (8 * sizeof (mark_type));
-
+
return (pch_zone.mark_bits[mark_word] & (1 << mark_bit)) != 0;
}
G.zones->next_zone = new_zone;
}
-struct alloc_zone *
-new_ggc_zone (const char * name)
-{
- struct alloc_zone *new_zone = XCNEW (struct alloc_zone);
- new_ggc_zone_1 (new_zone, name);
- return new_zone;
-}
-
-/* Destroy a GGC zone. */
-void
-destroy_ggc_zone (struct alloc_zone * dead_zone)
-{
- struct alloc_zone *z;
-
- for (z = G.zones; z && z->next_zone != dead_zone; z = z->next_zone)
- /* Just find that zone. */
- continue;
-
- /* We should have found the zone in the list. Anything else is fatal. */
- gcc_assert (z);
-
- /* z is dead, baby. z is dead. */
- z->dead = true;
-}
-
/* Free all empty pages and objects within a page for a given zone */
static void
ggc_prune_overhead_list ();
#endif
}
-
+
sweep_pages (zone);
zone->was_collected = true;
zone->allocated_last_gc = zone->allocated;
}
}
+ invoke_plugin_callbacks (PLUGIN_GGC_START, NULL);
+
/* Start by possibly collecting the main zone. */
main_zone.was_collected = false;
marked |= ggc_collect_1 (&main_zone, true);
}
}
+ invoke_plugin_callbacks (PLUGIN_GGC_END, NULL);
+
timevar_pop (TV_GC);
}
chunk = chunk->next_free;
}
}
-
+
fprintf (stderr, "%20s %10lu%c %10lu%c %10lu%c\n",
zone->name,
SCALE (allocated), LABEL (allocated),
SCALE (total_allocated), LABEL(total_allocated),
SCALE (total_overhead), LABEL (total_overhead));
-#ifdef GATHER_STATISTICS
+#ifdef GATHER_STATISTICS
{
unsigned long long all_overhead = 0, all_allocated = 0;
unsigned long long all_overhead_under32 = 0, all_allocated_under32 = 0;
all_allocated_under64 += zone->stats.total_allocated_under64;
all_overhead_under64 += zone->stats.total_overhead_under64;
-
+
all_allocated_under128 += zone->stats.total_allocated_under128;
all_overhead_under128 += zone->stats.total_overhead_under128;
size_t
ggc_pch_total_size (struct ggc_pch_data *d)
{
- enum gt_types_enum i;
+ int i;
size_t alloc_size, total_size;
total_size = 0;
/* We've just read in a PCH file. So, every object that used to be
allocated is now free. */
+#ifdef 0 && GATHER_STATISTICS
+ zone_allocate_marks ();
+ ggc_prune_overhead_list ();
+ zone_free_marks ();
+#endif
+
for (zone = G.zones; zone; zone = zone->next_zone)
{
struct small_page_entry *page, *next_page;
OSDN Git Service
