Add `ODIN_SANITIZER_FLAGS` global constant

core/runtime/core.odin

@@ -510,6 +510,19 @@ Odin_Endian_Type :: type_of(ODIN_ENDIAN)
 */
 Odin_Platform_Subtarget_Type :: type_of(ODIN_PLATFORM_SUBTARGET)
 
+/*
+	// Defined internally by the compiler
+	Odin_Sanitizer_Flag :: enum u32 {
+		Address = 0,
+		Memory  = 1,
+		Thread  = 2,
+	}
+	Odin_Sanitizer_Flags :: distinct bitset[Odin_Sanitizer_Flag; u32]
+
+	ODIN_SANITIZER_FLAGS // is a constant
+*/
+Odin_Sanitizer_Flags :: type_of(ODIN_SANITIZER_FLAGS)
+
 
 /////////////////////////////
 // Init Startup Procedures //

src/checker.cpp

@@ -1086,6 +1086,33 @@ gb_internal void init_universal(void) {
 
 	add_global_bool_constant("__ODIN_LLVM_F16_SUPPORTED", lb_use_new_pass_system());
 
+	{
+		GlobalEnumValue values[3] = {
+			{"Address", 0},
+			{"Memory",  1},
+			{"Thread",  2},
+		};
+
+		Type *enum_type = nullptr;
+		auto flags = add_global_enum_type(str_lit("Odin_Sanitizer_Flag"), values, gb_count_of(values), &enum_type);
+		Type *bit_set_type = alloc_type_bit_set();
+		bit_set_type->BitSet.elem = enum_type;
+		bit_set_type->BitSet.underlying = t_u32;
+		bit_set_type->BitSet.lower = 0;
+		bit_set_type->BitSet.upper = 2;
+		type_size_of(bit_set_type);
+
+		String type_name = str_lit("Odin_Sanitizer_Flags");
+		Scope *scope = create_scope(nullptr, builtin_pkg->scope);
+		Entity *entity = alloc_entity_type_name(scope, make_token_ident(type_name), nullptr, EntityState_Resolved);
+
+		Type *named_type = alloc_type_named(type_name, bit_set_type, entity);
+		set_base_type(named_type, bit_set_type);
+
+		add_global_constant("ODIN_SANITIZER_FLAGS", named_type, exact_value_u64(bc->sanitizer_flags));
+	}
+
+
 
 // Builtin Procedures
 	for (isize i = 0; i < gb_count_of(builtin_procs); i++) {