1 /* 2 * Copyright (c) 1999, 2007, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 class StubAssembler; 26 27 // The Runtime1 holds all assembly stubs and VM 28 // runtime routines needed by code code generated 29 // by the Compiler1. 30 31 #define RUNTIME1_STUBS(stub, last_entry) \ 32 stub(dtrace_object_alloc) \ 33 stub(unwind_exception) \ 34 stub(forward_exception) \ 35 stub(throw_range_check_failed) /* throws ArrayIndexOutOfBoundsException */ \ 36 stub(throw_index_exception) /* throws IndexOutOfBoundsException */ \ 37 stub(throw_div0_exception) \ 38 stub(throw_null_pointer_exception) \ 39 stub(register_finalizer) \ 40 stub(new_instance) \ 41 stub(fast_new_instance) \ 42 stub(fast_new_instance_init_check) \ 43 stub(new_type_array) \ 44 stub(new_object_array) \ 45 stub(new_multi_array) \ 46 stub(handle_exception_nofpu) /* optimized version that does not preserve fpu registers */ \ 47 stub(handle_exception) \ 48 stub(throw_array_store_exception) \ 49 stub(throw_class_cast_exception) \ 50 stub(throw_incompatible_class_change_error) \ 51 stub(slow_subtype_check) \ 52 stub(monitorenter) \ 53 stub(monitorenter_nofpu) /* optimized version that does not preserve fpu registers */ \ 54 stub(monitorexit) \ 55 stub(monitorexit_nofpu) /* optimized version that does not preserve fpu registers */ \ 56 stub(access_field_patching) \ 57 stub(load_klass_patching) \ 58 stub(jvmti_exception_throw) \ 59 stub(g1_pre_barrier_slow) \ 60 stub(g1_post_barrier_slow) \ 61 stub(fpu2long_stub) \ 62 stub(counter_overflow) \ 63 last_entry(number_of_ids) 64 65 #define DECLARE_STUB_ID(x) x ## _id , 66 #define DECLARE_LAST_STUB_ID(x) x 67 #define STUB_NAME(x) #x " Runtime1 stub", 68 #define LAST_STUB_NAME(x) #x " Runtime1 stub" 69 70 class Runtime1: public AllStatic { 71 friend class VMStructs; 72 friend class ArrayCopyStub; 73 private: 74 static int desired_max_code_buffer_size() { 75 return (int) NMethodSizeLimit; // default 256K or 512K 76 } 77 static int desired_max_constant_size() { 78 return (int) NMethodSizeLimit / 10; // about 25K 79 } 80 81 // Note: This buffers is allocated once at startup since allocation 82 // for each compilation seems to be too expensive (at least on Intel 83 // win32). 84 static BufferBlob* _buffer_blob; 85 86 public: 87 enum StubID { 88 RUNTIME1_STUBS(DECLARE_STUB_ID, DECLARE_LAST_STUB_ID) 89 }; 90 91 // statistics 92 #ifndef PRODUCT 93 static int _resolve_invoke_cnt; 94 static int _handle_wrong_method_cnt; 95 static int _ic_miss_cnt; 96 static int _generic_arraycopy_cnt; 97 static int _primitive_arraycopy_cnt; 98 static int _oop_arraycopy_cnt; 99 static int _arraycopy_slowcase_cnt; 100 static int _new_type_array_slowcase_cnt; 101 static int _new_object_array_slowcase_cnt; 102 static int _new_instance_slowcase_cnt; 103 static int _new_multi_array_slowcase_cnt; 104 static int _monitorenter_slowcase_cnt; 105 static int _monitorexit_slowcase_cnt; 106 static int _patch_code_slowcase_cnt; 107 static int _throw_range_check_exception_count; 108 static int _throw_index_exception_count; 109 static int _throw_div0_exception_count; 110 static int _throw_null_pointer_exception_count; 111 static int _throw_class_cast_exception_count; 112 static int _throw_incompatible_class_change_error_count; 113 static int _throw_array_store_exception_count; 114 static int _throw_count; 115 #endif 116 117 private: 118 static bool _is_initialized; 119 static CodeBlob* _blobs[number_of_ids]; 120 static const char* _blob_names[]; 121 122 // stub generation 123 static void generate_blob_for(StubID id); 124 static OopMapSet* generate_code_for(StubID id, StubAssembler* masm); 125 static OopMapSet* generate_exception_throw(StubAssembler* sasm, address target, bool has_argument); 126 static void generate_handle_exception(StubAssembler *sasm, OopMapSet* oop_maps, OopMap* oop_map, bool ignore_fpu_registers = false); 127 static void generate_unwind_exception(StubAssembler *sasm); 128 static OopMapSet* generate_patching(StubAssembler* sasm, address target); 129 130 static OopMapSet* generate_stub_call(StubAssembler* sasm, Register result, address entry, 131 Register arg1 = noreg, Register arg2 = noreg, Register arg3 = noreg); 132 133 // runtime entry points 134 static void new_instance (JavaThread* thread, klassOopDesc* klass); 135 static void new_type_array (JavaThread* thread, klassOopDesc* klass, jint length); 136 static void new_object_array(JavaThread* thread, klassOopDesc* klass, jint length); 137 static void new_multi_array (JavaThread* thread, klassOopDesc* klass, int rank, jint* dims); 138 139 #ifdef TIERED 140 static void counter_overflow(JavaThread* thread, int bci); 141 #endif // TIERED 142 143 static void unimplemented_entry (JavaThread* thread, StubID id); 144 145 static address exception_handler_for_pc(JavaThread* thread); 146 static void post_jvmti_exception_throw(JavaThread* thread); 147 148 static void throw_range_check_exception(JavaThread* thread, int index); 149 static void throw_index_exception(JavaThread* thread, int index); 150 static void throw_div0_exception(JavaThread* thread); 151 static void throw_null_pointer_exception(JavaThread* thread); 152 static void throw_class_cast_exception(JavaThread* thread, oopDesc* obect); 153 static void throw_incompatible_class_change_error(JavaThread* thread); 154 static void throw_array_store_exception(JavaThread* thread); 155 156 static void monitorenter(JavaThread* thread, oopDesc* obj, BasicObjectLock* lock); 157 static void monitorexit (JavaThread* thread, BasicObjectLock* lock); 158 159 static int access_field_patching(JavaThread* thread); 160 static int move_klass_patching(JavaThread* thread); 161 162 static void patch_code(JavaThread* thread, StubID stub_id); 163 164 public: 165 static BufferBlob* get_buffer_blob(); 166 static void setup_code_buffer(CodeBuffer* cb, int call_stub_estimate); 167 168 // initialization 169 static bool is_initialized() { return _is_initialized; } 170 static void initialize(); 171 static void initialize_pd(); 172 173 // stubs 174 static CodeBlob* blob_for (StubID id); 175 static address entry_for(StubID id) { return blob_for(id)->instructions_begin(); } 176 static const char* name_for (StubID id); 177 static const char* name_for_address(address entry); 178 179 // method tracing 180 static void trace_block_entry(jint block_id); 181 182 #ifndef PRODUCT 183 static address throw_count_address() { return (address)&_throw_count; } 184 #endif 185 186 // directly accessible leaf routine 187 static int arraycopy(oopDesc* src, int src_pos, oopDesc* dst, int dst_pos, int length); 188 static void primitive_arraycopy(HeapWord* src, HeapWord* dst, int length); 189 static void oop_arraycopy(HeapWord* src, HeapWord* dst, int length); 190 191 static void print_statistics() PRODUCT_RETURN; 192 };