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/*
* sgen-internal.c: Internal lock-free memory allocator.
*
* Copyright (C) 2012 Xamarin Inc
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License 2.0 as published by the Free Software Foundation;
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License 2.0 along with this library; if not, write to the Free
* Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "config.h"
#ifdef HAVE_SGEN_GC
#include "utils/mono-counters.h"
#include "metadata/sgen-gc.h"
#include "utils/lock-free-alloc.h"
#include "metadata/sgen-memory-governor.h"
/* keep each size a multiple of ALLOC_ALIGN */
static const int allocator_sizes [] = {
8, 16, 24, 32, 40, 48, 64, 80,
96, 128, 160, 192, 224, 248, 320, 384,
448, 528, 584, 680, 816, 1088, 1360, 2040,
2336, 2728, 3272, 4088, 5456, 8184 };
#define NUM_ALLOCATORS (sizeof (allocator_sizes) / sizeof (int))
static MonoLockFreeAllocSizeClass size_classes [NUM_ALLOCATORS];
static MonoLockFreeAllocator allocators [NUM_ALLOCATORS];
/*
* Find the allocator index for memory chunks that can contain @size
* objects.
*/
static int
index_for_size (size_t size)
{
int slot;
/* do a binary search or lookup table later. */
for (slot = 0; slot < NUM_ALLOCATORS; ++slot) {
if (allocator_sizes [slot] >= size)
return slot;
}
g_assert_not_reached ();
return -1;
}
/*
* Allocator indexes for the fixed INTERNAL_MEM_XXX types. -1 if that
* type is dynamic.
*/
static int fixed_type_allocator_indexes [INTERNAL_MEM_MAX];
void
sgen_register_fixed_internal_mem_type (int type, size_t size)
{
int slot;
g_assert (type >= 0 && type < INTERNAL_MEM_MAX);
slot = index_for_size (size);
g_assert (slot >= 0);
if (fixed_type_allocator_indexes [type] == -1)
fixed_type_allocator_indexes [type] = slot;
else
g_assert (fixed_type_allocator_indexes [type] == slot);
}
static const char*
description_for_type (int type)
{
switch (type) {
case INTERNAL_MEM_PIN_QUEUE: return "pin-queue";
case INTERNAL_MEM_FRAGMENT: return "fragment";
case INTERNAL_MEM_SECTION: return "section";
case INTERNAL_MEM_SCAN_STARTS: return "scan-starts";
case INTERNAL_MEM_FIN_TABLE: return "fin-table";
case INTERNAL_MEM_FINALIZE_ENTRY: return "finalize-entry";
case INTERNAL_MEM_FINALIZE_READY_ENTRY: return "finalize-ready-entry";
case INTERNAL_MEM_DISLINK_TABLE: return "dislink-table";
case INTERNAL_MEM_DISLINK: return "dislink";
case INTERNAL_MEM_ROOTS_TABLE: return "roots-table";
case INTERNAL_MEM_ROOT_RECORD: return "root-record";
case INTERNAL_MEM_STATISTICS: return "statistics";
case INTERNAL_MEM_STAT_PINNED_CLASS: return "pinned-class";
case INTERNAL_MEM_STAT_REMSET_CLASS: return "remset-class";
case INTERNAL_MEM_GRAY_QUEUE: return "gray-queue";
case INTERNAL_MEM_MS_TABLES: return "marksweep-tables";
case INTERNAL_MEM_MS_BLOCK_INFO: return "marksweep-block-info";
case INTERNAL_MEM_MS_BLOCK_INFO_SORT: return "marksweep-block-info-sort";
case INTERNAL_MEM_EPHEMERON_LINK: return "ephemeron-link";
case INTERNAL_MEM_WORKER_DATA: return "worker-data";
case INTERNAL_MEM_WORKER_JOB_DATA: return "worker-job-data";
case INTERNAL_MEM_BRIDGE_DATA: return "bridge-data";
case INTERNAL_MEM_BRIDGE_HASH_TABLE: return "bridge-hash-table";
case INTERNAL_MEM_BRIDGE_HASH_TABLE_ENTRY: return "bridge-hash-table-entry";
case INTERNAL_MEM_BRIDGE_ALIVE_HASH_TABLE: return "bridge-alive-hash-table";
case INTERNAL_MEM_BRIDGE_ALIVE_HASH_TABLE_ENTRY: return "bridge-alive-hash-table-entry";
case INTERNAL_MEM_JOB_QUEUE_ENTRY: return "job-queue-entry";
case INTERNAL_MEM_TOGGLEREF_DATA: return "toggleref-data";
case INTERNAL_MEM_CARDTABLE_MOD_UNION: return "cardtable-mod-union";
case INTERNAL_MEM_BINARY_PROTOCOL: return "binary-protocol";
default:
g_assert_not_reached ();
}
}
void*
sgen_alloc_internal_dynamic (size_t size, int type, gboolean assert_on_failure)
{
int index;
void *p;
if (size > allocator_sizes [NUM_ALLOCATORS - 1]) {
p = sgen_alloc_os_memory (size, SGEN_ALLOC_INTERNAL | SGEN_ALLOC_ACTIVATE, NULL);
if (!p)
sgen_assert_memory_alloc (NULL, size, description_for_type (type));
} else {
index = index_for_size (size);
p = mono_lock_free_alloc (&allocators [index]);
if (!p)
sgen_assert_memory_alloc (NULL, size, description_for_type (type));
memset (p, 0, size);
}
MONO_GC_INTERNAL_ALLOC ((mword)p, size, type);
return p;
}
void
sgen_free_internal_dynamic (void *addr, size_t size, int type)
{
if (!addr)
return;
if (size > allocator_sizes [NUM_ALLOCATORS - 1])
sgen_free_os_memory (addr, size, SGEN_ALLOC_INTERNAL);
else
mono_lock_free_free (addr);
MONO_GC_INTERNAL_DEALLOC ((mword)addr, size, type);
}
void*
sgen_alloc_internal (int type)
{
int index = fixed_type_allocator_indexes [type];
int size = allocator_sizes [index];
void *p;
g_assert (index >= 0 && index < NUM_ALLOCATORS);
p = mono_lock_free_alloc (&allocators [index]);
memset (p, 0, size);
MONO_GC_INTERNAL_ALLOC ((mword)p, size, type);
return p;
}
void
sgen_free_internal (void *addr, int type)
{
int index;
if (!addr)
return;
index = fixed_type_allocator_indexes [type];
g_assert (index >= 0 && index < NUM_ALLOCATORS);
mono_lock_free_free (addr);
if (MONO_GC_INTERNAL_DEALLOC_ENABLED ()) {
int size G_GNUC_UNUSED = allocator_sizes [index];
MONO_GC_INTERNAL_DEALLOC ((mword)addr, size, type);
}
}
void
sgen_dump_internal_mem_usage (FILE *heap_dump_file)
{
/*
int i;
fprintf (heap_dump_file, "<other-mem-usage type=\"large-internal\" size=\"%lld\"/>\n", large_internal_bytes_alloced);
fprintf (heap_dump_file, "<other-mem-usage type=\"pinned-chunks\" size=\"%lld\"/>\n", pinned_chunk_bytes_alloced);
for (i = 0; i < INTERNAL_MEM_MAX; ++i) {
fprintf (heap_dump_file, "<other-mem-usage type=\"%s\" size=\"%ld\"/>\n",
description_for_type (i), unmanaged_allocator.small_internal_mem_bytes [i]);
}
*/
}
void
sgen_report_internal_mem_usage (void)
{
/* FIXME: implement */
printf ("not implemented yet\n");
}
void
sgen_init_internal_allocator (void)
{
int i;
for (i = 0; i < INTERNAL_MEM_MAX; ++i)
fixed_type_allocator_indexes [i] = -1;
for (i = 0; i < NUM_ALLOCATORS; ++i) {
mono_lock_free_allocator_init_size_class (&size_classes [i], allocator_sizes [i]);
mono_lock_free_allocator_init_allocator (&allocators [i], &size_classes [i]);
}
}
#endif
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