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         if (!do_pin_stats)
  82                 return;
  83         while (*node_ptr) {
  84                 node = *node_ptr;
  85                 if (addr == node->addr) {
  86                         node->pin_types |= pin_type_bit;
  87                         return;
  88                 }
  89                 if (addr < node->addr)
  90                         node_ptr = &node->left;
  91                 else
  92                         node_ptr = &node->right;
  93         }
  94
  95         node = (PinStatAddress *)sgen_alloc_internal_dynamic (sizeof (PinStatAddress), INTERNAL_MEM_STATISTICS, TRUE);
  96         node->addr = addr;
  97         node->pin_types = pin_type_bit;
  98         node->left = node->right = NULL;
  99
 100         *node_ptr = node;
 101 }
 102
 103 static void
 104 pin_stats_count_object_from_tree (GCObject *object, size_t size, PinStatAddress *node, int *pin_types)
 105 {
 106         char *obj = (char*)object;
 107         if (!node)
 108                 return;
 109         if (node->addr >= obj && node->addr < obj + size) {
 110                 int i;
 111                 for (i = 0; i < PIN_TYPE_MAX; ++i) {
 112                         int pin_bit = 1 << i;
 113                         if (!(*pin_types & pin_bit) && (node->pin_types & pin_bit)) {
 114                                 pinned_byte_counts [i] += size;
 115                                 *pin_types |= pin_bit;
 116                         }
 117                 }
 118         }
 119         if (obj < node->addr)
 120                 pin_stats_count_object_from_tree (object, size, node->left, pin_types);
 121         if (obj + size - 1 > node->addr)
 122                 pin_stats_count_object_from_tree (object, size, node->right, pin_types);
 123 }
 124
 125 static gpointer
 126 lookup_vtable_entry (SgenHashTable *hash_table, GCVTable vtable, gpointer empty_entry)
 127 {
 128         char *name = g_strdup_printf ("%s.%s", sgen_client_vtable_get_namespace (vtable), sgen_client_vtable_get_name (vtable));
 129         gpointer entry = sgen_hash_table_lookup (hash_table, name);
 130
 131         if (entry) {
 132                 g_free (name);
 133         } else {
 134                 sgen_hash_table_replace (hash_table, name, empty_entry, NULL);
 135                 entry = sgen_hash_table_lookup (hash_table, name);
 136         }
 137
 138         return entry;
 139 }
 140
 141 static void
 142 register_vtable (GCVTable vtable, int pin_types)
 143 {
 144         PinnedClassEntry empty_entry;
 145         PinnedClassEntry *entry;
 146         int i;
 147
 148         memset (&empty_entry, 0, sizeof (PinnedClassEntry));
 149         entry = (PinnedClassEntry *)lookup_vtable_entry (&pinned_class_hash_table, vtable, &empty_entry);
 150
 151         for (i = 0; i < PIN_TYPE_MAX; ++i) {
 152                 if (pin_types & (1 << i))
 153                         ++entry->num_pins [i];
 154         }
 155 }
 156
 157 void
 158 sgen_pin_stats_register_object (GCObject *obj, size_t size)
 159 {
 160         int pin_types = 0;
 161
 162         if (!do_pin_stats)
 163                 return;
 164
 165         pin_stats_count_object_from_tree (obj, size, pin_stat_addresses, &pin_types);
 166         sgen_pointer_queue_add (&pinned_objects, obj);
 167
 168         if (pin_types)
 169                 register_vtable (SGEN_LOAD_VTABLE (obj), pin_types);
 170 }
 171
 172 void
 173 sgen_pin_stats_register_global_remset (GCObject *obj)
 174 {
 175         GlobalRemsetClassEntry empty_entry;
 176         GlobalRemsetClassEntry *entry;
 177
 178         if (!do_pin_stats)
 179                 return;
 180
 181         memset (&empty_entry, 0, sizeof (GlobalRemsetClassEntry));
 182         entry = (GlobalRemsetClassEntry *)lookup_vtable_entry (&global_remset_class_hash_table, SGEN_LOAD_VTABLE (obj), &empty_entry);
 183
 184         ++entry->num_remsets;
 185 }
 186
 187 void
 188 sgen_pin_stats_print_class_stats (void)
 189 {
 190         char *name;
 191         PinnedClassEntry *pinned_entry;
 192         GlobalRemsetClassEntry *remset_entry;
 193
 194         if (!do_pin_stats)
 195                 return;
 196
 197         mono_gc_printf (gc_debug_file, "\n%-50s  %10s  %10s  %10s\n", "Class", "Stack", "Static", "Other");
 198         SGEN_HASH_TABLE_FOREACH (&pinned_class_hash_table, char *, name, PinnedClassEntry *, pinned_entry) {
 199                 int i;
 200                 mono_gc_printf (gc_debug_file, "%-50s", name);
 201                 for (i = 0; i < PIN_TYPE_MAX; ++i)
 202                         mono_gc_printf (gc_debug_file, "  %10ld", pinned_entry->num_pins [i]);
 203                 mono_gc_printf (gc_debug_file, "\n");
 204         } SGEN_HASH_TABLE_FOREACH_END;
 205
 206         mono_gc_printf (gc_debug_file, "\n%-50s  %10s\n", "Class", "#Remsets");
 207         SGEN_HASH_TABLE_FOREACH (&global_remset_class_hash_table, char *, name, GlobalRemsetClassEntry *, remset_entry) {
 208                 mono_gc_printf (gc_debug_file, "%-50s  %10ld\n", name, remset_entry->num_remsets);
 209         } SGEN_HASH_TABLE_FOREACH_END;
 210
 211         mono_gc_printf (gc_debug_file, "\nTotal bytes pinned from stack: %ld  static: %ld  other: %ld\n",
 212                         pinned_byte_counts [PIN_TYPE_STACK],
 213                         pinned_byte_counts [PIN_TYPE_STATIC_DATA],
 214                         pinned_byte_counts [PIN_TYPE_OTHER]);
 215 }
 216
 217 size_t
 218 sgen_pin_stats_get_pinned_byte_count (int pin_type)
 219 {
 220         return pinned_byte_counts [pin_type];
 221 }
 222
 223 SgenPointerQueue*
 224 sgen_pin_stats_get_object_list (void)
 225 {
 226         return &pinned_objects;
 227 }
 228
 229 #endif /* HAVE_SGEN_GC */