mono/mini/mini-generic-sharing.c

   1 /*
   2  * generic-sharing.c: Support functions for generic sharing.
   3  *
   4  * Author:
   5  *   Mark Probst (mark.probst@gmail.com)
   6  *
   7  * (C) 2007 Novell, Inc.
   8  */
   9
  10 #include <config.h>
  11
  12 #include <mono/metadata/class.h>
  13 #include <mono/utils/mono-counters.h>
  14
  15 #include "mini.h"
  16
  17 /*
  18  * mono_get_generic_context_from_code:
  19  *
  20  *   Return the runtime generic context belonging to the method whose native code
  21  * contains CODE.
  22  */
  23 MonoGenericSharingContext*
  24 mono_get_generic_context_from_code (guint8 *code)
  25 {
  26         MonoJitInfo *jit_info = mono_jit_info_table_find (mono_domain_get (), (char*)code);
  27
  28         g_assert (jit_info);
  29
  30         return mono_jit_info_get_generic_sharing_context (jit_info);
  31 }
  32
  33 MonoGenericContext*
  34 mini_method_get_context (MonoMethod *method)
  35 {
  36         return mono_method_get_context_general (method, TRUE);
  37 }
  38
  39 /*
  40  * mono_method_check_context_used:
  41  * @method: a method
  42  *
  43  * Checks whether the method's generic context uses a type variable.
  44  * Returns an int with the bits MONO_GENERIC_CONTEXT_USED_CLASS and
  45  * MONO_GENERIC_CONTEXT_USED_METHOD set to reflect whether the
  46  * context's class or method instantiation uses type variables.
  47  */
  48 int
  49 mono_method_check_context_used (MonoMethod *method)
  50 {
  51         MonoGenericContext *method_context = mini_method_get_context (method);
  52         int context_used = 0;
  53
  54         if (!method_context) {
  55                 /* It might be a method of an array of an open generic type */
  56                 if (method->klass->rank)
  57                         context_used = mono_class_check_context_used (method->klass);
  58         } else {
  59                 context_used = mono_generic_context_check_used (method_context);
  60                 context_used |= mono_class_check_context_used (method->klass);
  61         }
  62
  63         return context_used;
  64 }
  65
  66 static gboolean
  67 generic_inst_equal (MonoGenericInst *inst1, MonoGenericInst *inst2)
  68 {
  69         int i;
  70
  71         if (!inst1) {
  72                 g_assert (!inst2);
  73                 return TRUE;
  74         }
  75
  76         g_assert (inst2);
  77
  78         if (inst1->type_argc != inst2->type_argc)
  79                 return FALSE;
  80
  81         for (i = 0; i < inst1->type_argc; ++i)
  82                 if (!mono_metadata_type_equal (inst1->type_argv [i], inst2->type_argv [i]))
  83                         return FALSE;
  84
  85         return TRUE;
  86 }
  87
  88 /*
  89  * mono_generic_context_equal_deep:
  90  * @context1: a generic context
  91  * @context2: a generic context
  92  *
  93  * Returns whether context1's type arguments are equal to context2's
  94  * type arguments.
  95  */
  96 gboolean
  97 mono_generic_context_equal_deep (MonoGenericContext *context1, MonoGenericContext *context2)
  98 {
  99         return generic_inst_equal (context1->class_inst, context2->class_inst) &&
 100                 generic_inst_equal (context1->method_inst, context2->method_inst);
 101 }
 102
 103 /*
 104  * mini_class_get_container_class:
 105  * @class: a generic class
 106  *
 107  * Returns the class's container class, which is the class itself if
 108  * it doesn't have generic_class set.
 109  */
 110 MonoClass*
 111 mini_class_get_container_class (MonoClass *class)
 112 {
 113         if (class->generic_class)
 114                 return class->generic_class->container_class;
 115
 116         g_assert (class->generic_container);
 117         return class;
 118 }
 119
 120 /*
 121  * mini_class_get_context:
 122  * @class: a generic class
 123  *
 124  * Returns the class's generic context.
 125  */
 126 MonoGenericContext*
 127 mini_class_get_context (MonoClass *class)
 128 {
 129         if (class->generic_class)
 130                 return &class->generic_class->context;
 131
 132         g_assert (class->generic_container);
 133         return &class->generic_container->context;
 134 }
 135
 136 /*
 137  * mini_get_basic_type_from_generic:
 138  * @gsctx: a generic sharing context
 139  * @type: a type
 140  *
 141  * Returns a closed type corresponding to the possibly open type
 142  * passed to it.
 143  */
 144 MonoType*
 145 mini_get_basic_type_from_generic (MonoGenericSharingContext *gsctx, MonoType *type)
 146 {
 147         if (!type->byref && (type->type == MONO_TYPE_VAR || type->type == MONO_TYPE_MVAR))
 148                 g_assert (gsctx);
 149
 150         return mono_type_get_basic_type_from_generic (type);
 151 }
 152
 153 /*
 154  * mini_type_get_underlying_type:
 155  *
 156  *   Return the underlying type of TYPE, taking into account enums and generic
 157  * sharing.
 158  */
 159 MonoType*
 160 mini_type_get_underlying_type (MonoGenericSharingContext *gsctx, MonoType *type)
 161 {
 162         return mono_type_get_basic_type_from_generic (mono_type_get_underlying_type (type));
 163 }
 164
 165 /*
 166  * mini_type_stack_size:
 167  * @gsctx: a generic sharing context
 168  * @t: a type
 169  * @align: Pointer to an int for returning the alignment
 170  *
 171  * Returns the type's stack size and the alignment in *align.  The
 172  * type is allowed to be open.
 173  */
 174 int
 175 mini_type_stack_size (MonoGenericSharingContext *gsctx, MonoType *t, int *align)
 176 {
 177         gboolean allow_open = TRUE;
 178
 179         // FIXME: Some callers might not pass in a gsctx
 180         //allow_open = gsctx != NULL;
 181         return mono_type_stack_size_internal (t, align, allow_open);
 182 }
 183
 184 /*
 185  * mini_type_stack_size_full:
 186  *
 187  *   Same as mini_type_stack_size, but handle pinvoke data types as well.
 188  */
 189 int
 190 mini_type_stack_size_full (MonoGenericSharingContext *gsctx, MonoType *t, guint32 *align, gboolean pinvoke)
 191 {
 192         int size;
 193
 194         if (pinvoke) {
 195                 size = mono_type_native_stack_size (t, align);
 196         } else {
 197                 int ialign;
 198
 199                 if (align) {
 200                         size = mini_type_stack_size (gsctx, t, &ialign);
 201                         *align = ialign;
 202                 } else {
 203                         size = mini_type_stack_size (gsctx, t, NULL);
 204                 }
 205         }
 206
 207         return size;
 208 }
 209
 210 /*
 211  * mono_generic_sharing_init:
 212  *
 213  * Register the generic sharing counters.
 214  */
 215 void
 216 mono_generic_sharing_init (void)
 217 {
 218 }