1 /*
2 * Copyright (c) 1999, 2010, 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
74 public:
75 enum StubID {
76 RUNTIME1_STUBS(DECLARE_STUB_ID, DECLARE_LAST_STUB_ID)
77 };
78
79 // statistics
80 #ifndef PRODUCT
81 static int _resolve_invoke_cnt;
82 static int _handle_wrong_method_cnt;
83 static int _ic_miss_cnt;
84 static int _generic_arraycopy_cnt;
85 static int _primitive_arraycopy_cnt;
86 static int _oop_arraycopy_cnt;
87 static int _arraycopy_slowcase_cnt;
88 static int _new_type_array_slowcase_cnt;
89 static int _new_object_array_slowcase_cnt;
90 static int _new_instance_slowcase_cnt;
91 static int _new_multi_array_slowcase_cnt;
92 static int _monitorenter_slowcase_cnt;
93 static int _monitorexit_slowcase_cnt;
94 static int _patch_code_slowcase_cnt;
95 static int _throw_range_check_exception_count;
96 static int _throw_index_exception_count;
97 static int _throw_div0_exception_count;
98 static int _throw_null_pointer_exception_count;
99 static int _throw_class_cast_exception_count;
100 static int _throw_incompatible_class_change_error_count;
101 static int _throw_array_store_exception_count;
102 static int _throw_count;
103 #endif
104
105 private:
106 static CodeBlob* _blobs[number_of_ids];
107 static const char* _blob_names[];
108
109 // stub generation
110 static void generate_blob_for(BufferBlob* blob, StubID id);
111 static OopMapSet* generate_code_for(StubID id, StubAssembler* masm);
112 static OopMapSet* generate_exception_throw(StubAssembler* sasm, address target, bool has_argument);
113 static void generate_handle_exception(StubAssembler *sasm, OopMapSet* oop_maps, OopMap* oop_map, bool ignore_fpu_registers = false);
114 static void generate_unwind_exception(StubAssembler *sasm);
115 static OopMapSet* generate_patching(StubAssembler* sasm, address target);
116
117 static OopMapSet* generate_stub_call(StubAssembler* sasm, Register result, address entry,
118 Register arg1 = noreg, Register arg2 = noreg, Register arg3 = noreg);
119
120 // runtime entry points
121 static void new_instance (JavaThread* thread, klassOopDesc* klass);
122 static void new_type_array (JavaThread* thread, klassOopDesc* klass, jint length);
123 static void new_object_array(JavaThread* thread, klassOopDesc* klass, jint length);
124 static void new_multi_array (JavaThread* thread, klassOopDesc* klass, int rank, jint* dims);
125
126 static address counter_overflow(JavaThread* thread, int bci, methodOopDesc* method);
127
128 static void unimplemented_entry (JavaThread* thread, StubID id);
129
130 static address exception_handler_for_pc(JavaThread* thread);
131 static void post_jvmti_exception_throw(JavaThread* thread);
132
133 static void throw_range_check_exception(JavaThread* thread, int index);
134 static void throw_index_exception(JavaThread* thread, int index);
135 static void throw_div0_exception(JavaThread* thread);
136 static void throw_null_pointer_exception(JavaThread* thread);
137 static void throw_class_cast_exception(JavaThread* thread, oopDesc* obect);
138 static void throw_incompatible_class_change_error(JavaThread* thread);
139 static void throw_array_store_exception(JavaThread* thread);
140
141 static void monitorenter(JavaThread* thread, oopDesc* obj, BasicObjectLock* lock);
142 static void monitorexit (JavaThread* thread, BasicObjectLock* lock);
143
144 static int access_field_patching(JavaThread* thread);
145 static int move_klass_patching(JavaThread* thread);
146
147 static void patch_code(JavaThread* thread, StubID stub_id);
148
149 public:
150 // initialization
151 static void initialize(BufferBlob* blob);
152 static void initialize_pd();
153
154 // stubs
155 static CodeBlob* blob_for (StubID id);
156 static address entry_for(StubID id) { return blob_for(id)->code_begin(); }
157 static const char* name_for (StubID id);
158 static const char* name_for_address(address entry);
159
160 // platform might add runtime names.
161 static const char* pd_name_for_address(address entry);
162
163 // method tracing
164 static void trace_block_entry(jint block_id);
165
166 #ifndef PRODUCT
167 static address throw_count_address() { return (address)&_throw_count; }
168 #endif
169
170 // directly accessible leaf routine
171 static int arraycopy(oopDesc* src, int src_pos, oopDesc* dst, int dst_pos, int length);
172 static void primitive_arraycopy(HeapWord* src, HeapWord* dst, int length);
173 static void oop_arraycopy(HeapWord* src, HeapWord* dst, int length);
174
175 static void print_statistics() PRODUCT_RETURN;
176 };