mono/sgen/sgen-pinning-stats.c

   1 /*
   2  * Copyright 2001-2003 Ximian, Inc
   3  * Copyright 2003-2010 Novell, Inc.
   4  * Copyright 2011 Xamarin Inc (http://www.xamarin.com)
   5  *
   6  * Licensed under the MIT license. See LICENSE file in the project root for full license information.
   7  */
   8
   9 #include "config.h"
  10 #ifdef HAVE_SGEN_GC
  11
  12 #include <string.h>
  13
  14 #include "mono/sgen/sgen-gc.h"
  15 #include "mono/sgen/sgen-pinning.h"
  16 #include "mono/sgen/sgen-hash-table.h"
  17 #include "mono/sgen/sgen-client.h"
  18
  19 typedef struct _PinStatAddress PinStatAddress;
  20 struct _PinStatAddress {
  21         char *addr;
  22         int pin_types;
  23         PinStatAddress *left;
  24         PinStatAddress *right;
  25 };
  26
  27 typedef struct {
  28         size_t num_pins [PIN_TYPE_MAX];
  29 } PinnedClassEntry;
  30
  31 typedef struct {
  32         gulong num_remsets;
  33 } GlobalRemsetClassEntry;
  34
  35 static gboolean do_pin_stats = FALSE;
  36
  37 static PinStatAddress *pin_stat_addresses = NULL;
  38 static size_t pinned_byte_counts [PIN_TYPE_MAX];
  39
  40 static SgenPointerQueue pinned_objects = SGEN_POINTER_QUEUE_INIT (INTERNAL_MEM_STATISTICS);
  41
  42 static SgenHashTable pinned_class_hash_table = SGEN_HASH_TABLE_INIT (INTERNAL_MEM_STATISTICS, INTERNAL_MEM_STAT_PINNED_CLASS, sizeof (PinnedClassEntry), g_str_hash, g_str_equal);
  43 static SgenHashTable global_remset_class_hash_table = SGEN_HASH_TABLE_INIT (INTERNAL_MEM_STATISTICS, INTERNAL_MEM_STAT_REMSET_CLASS, sizeof (GlobalRemsetClassEntry), g_str_hash, g_str_equal);
  44
  45 void
  46 sgen_pin_stats_enable (void)
  47 {
  48         do_pin_stats = TRUE;
  49 }
  50
  51 static void
  52 pin_stats_tree_free (PinStatAddress *node)
  53 {
  54         if (!node)
  55                 return;
  56         pin_stats_tree_free (node->left);
  57         pin_stats_tree_free (node->right);
  58         sgen_free_internal_dynamic (node, sizeof (PinStatAddress), INTERNAL_MEM_STATISTICS);
  59 }
  60
  61 void
  62 sgen_pin_stats_reset (void)
  63 {
  64         int i;
  65         pin_stats_tree_free (pin_stat_addresses);
  66         pin_stat_addresses = NULL;
  67         for (i = 0; i < PIN_TYPE_MAX; ++i)
  68                 pinned_byte_counts [i] = 0;
  69         sgen_pointer_queue_clear (&pinned_objects);
  70         sgen_hash_table_clean (&pinned_class_hash_table);
  71         sgen_hash_table_clean (&global_remset_class_hash_table);
  72 }
  73
  74 void
  75 sgen_pin_stats_register_address (char *addr, int pin_type)
  76 {
  77         PinStatAddress **node_ptr = &pin_stat_addresses;
  78         PinStatAddress *node;
  79         int pin_type_bit = 1 << pin_type;
  80
  81         while (*node_ptr) {
  82                 node = *node_ptr;
  83                 if (addr == node->addr) {
  84                         node->pin_types |= pin_type_bit;
  85                         return;
  86                 }
  87                 if (addr < node->addr)
  88                         node_ptr = &node->left;
  89                 else
  90                         node_ptr = &node->right;
  91         }
  92
  93         node = (PinStatAddress *)sgen_alloc_internal_dynamic (sizeof (PinStatAddress), INTERNAL_MEM_STATISTICS, TRUE);
  94         node->addr = addr;
  95         node->pin_types = pin_type_bit;
  96         node->left = node->right = NULL;
  97
  98         *node_ptr = node;
  99 }
 100
 101 static void
 102 pin_stats_count_object_from_tree (GCObject *object, size_t size, PinStatAddress *node, int *pin_types)
 103 {
 104         char *obj = (char*)object;
 105         if (!node)
 106                 return;
 107         if (node->addr >= obj && node->addr < obj + size) {
 108                 int i;
 109                 for (i = 0; i < PIN_TYPE_MAX; ++i) {
 110                         int pin_bit = 1 << i;
 111                         if (!(*pin_types & pin_bit) && (node->pin_types & pin_bit)) {
 112                                 pinned_byte_counts [i] += size;
 113                                 *pin_types |= pin_bit;
 114                         }
 115                 }
 116         }
 117         if (obj < node->addr)
 118                 pin_stats_count_object_from_tree (object, size, node->left, pin_types);
 119         if (obj + size - 1 > node->addr)
 120                 pin_stats_count_object_from_tree (object, size, node->right, pin_types);
 121 }
 122
 123 static gpointer
 124 lookup_vtable_entry (SgenHashTable *hash_table, GCVTable vtable, gpointer empty_entry)
 125 {
 126         char *name = g_strdup_printf ("%s.%s", sgen_client_vtable_get_namespace (vtable), sgen_client_vtable_get_name (vtable));
 127         gpointer entry = sgen_hash_table_lookup (hash_table, name);
 128
 129         if (entry) {
 130                 g_free (name);
 131         } else {
 132                 sgen_hash_table_replace (hash_table, name, empty_entry, NULL);
 133                 entry = sgen_hash_table_lookup (hash_table, name);
 134         }
 135
 136         return entry;
 137 }
 138
 139 static void
 140 register_vtable (GCVTable vtable, int pin_types)
 141 {
 142         PinnedClassEntry empty_entry;
 143         PinnedClassEntry *entry;
 144         int i;
 145
 146         memset (&empty_entry, 0, sizeof (PinnedClassEntry));
 147         entry = (PinnedClassEntry *)lookup_vtable_entry (&pinned_class_hash_table, vtable, &empty_entry);
 148
 149         for (i = 0; i < PIN_TYPE_MAX; ++i) {
 150                 if (pin_types & (1 << i))
 151                         ++entry->num_pins [i];
 152         }
 153 }
 154
 155 void
 156 sgen_pin_stats_register_object (GCObject *obj, size_t size)
 157 {
 158         int pin_types = 0;
 159
 160         if (!do_pin_stats)
 161                 return;
 162
 163         pin_stats_count_object_from_tree (obj, size, pin_stat_addresses, &pin_types);
 164         sgen_pointer_queue_add (&pinned_objects, obj);
 165
 166         if (pin_types)
 167                 register_vtable (SGEN_LOAD_VTABLE (obj), pin_types);
 168 }
 169
 170 void
 171 sgen_pin_stats_register_global_remset (GCObject *obj)
 172 {
 173         GlobalRemsetClassEntry empty_entry;
 174         GlobalRemsetClassEntry *entry;
 175
 176         if (!do_pin_stats)
 177                 return;
 178
 179         memset (&empty_entry, 0, sizeof (GlobalRemsetClassEntry));
 180         entry = (GlobalRemsetClassEntry *)lookup_vtable_entry (&global_remset_class_hash_table, SGEN_LOAD_VTABLE (obj), &empty_entry);
 181
 182         ++entry->num_remsets;
 183 }
 184
 185 void
 186 sgen_pin_stats_print_class_stats (void)
 187 {
 188         char *name;
 189         PinnedClassEntry *pinned_entry;
 190         GlobalRemsetClassEntry *remset_entry;
 191
 192         if (!do_pin_stats)
 193                 return;
 194
 195         mono_gc_printf (gc_debug_file, "\n%-50s  %10s  %10s  %10s\n", "Class", "Stack", "Static", "Other");
 196         SGEN_HASH_TABLE_FOREACH (&pinned_class_hash_table, char *, name, PinnedClassEntry *, pinned_entry) {
 197                 int i;
 198                 mono_gc_printf (gc_debug_file, "%-50s", name);
 199                 for (i = 0; i < PIN_TYPE_MAX; ++i)
 200                         mono_gc_printf (gc_debug_file, "  %10ld", pinned_entry->num_pins [i]);
 201                 mono_gc_printf (gc_debug_file, "\n");
 202         } SGEN_HASH_TABLE_FOREACH_END;
 203
 204         mono_gc_printf (gc_debug_file, "\n%-50s  %10s\n", "Class", "#Remsets");
 205         SGEN_HASH_TABLE_FOREACH (&global_remset_class_hash_table, char *, name, GlobalRemsetClassEntry *, remset_entry) {
 206                 mono_gc_printf (gc_debug_file, "%-50s  %10ld\n", name, remset_entry->num_remsets);
 207         } SGEN_HASH_TABLE_FOREACH_END;
 208
 209         mono_gc_printf (gc_debug_file, "\nTotal bytes pinned from stack: %ld  static: %ld  other: %ld\n",
 210                         pinned_byte_counts [PIN_TYPE_STACK],
 211                         pinned_byte_counts [PIN_TYPE_STATIC_DATA],
 212                         pinned_byte_counts [PIN_TYPE_OTHER]);
 213 }
 214
 215 size_t
 216 sgen_pin_stats_get_pinned_byte_count (int pin_type)
 217 {
 218         return pinned_byte_counts [pin_type];
 219 }
 220
 221 SgenPointerQueue*
 222 sgen_pin_stats_get_object_list (void)
 223 {
 224         return &pinned_objects;
 225 }
 226
 227 #endif /* HAVE_SGEN_GC */