1 /*
2 * Copyright (c) 1997, 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 // The InterpreterRuntime is called by the interpreter for everything
26 // that cannot/should not be dealt with in assembly and needs C support.
27
28 class InterpreterRuntime: AllStatic {
29 friend class BytecodeClosure; // for method and bcp
30 friend class PrintingClosure; // for method and bcp
31
32 private:
33 // Helper functions to access current interpreter state
34 static frame last_frame(JavaThread *thread) { return thread->last_frame(); }
35 static methodOop method(JavaThread *thread) { return last_frame(thread).interpreter_frame_method(); }
36 static address bcp(JavaThread *thread) { return last_frame(thread).interpreter_frame_bcp(); }
37 static int bci(JavaThread *thread) { return last_frame(thread).interpreter_frame_bci(); }
38 static void set_bcp_and_mdp(address bcp, JavaThread*thread);
39 static Bytecodes::Code code(JavaThread *thread) {
40 // pass method to avoid calling unsafe bcp_to_method (partial fix 4926272)
41 return Bytecodes::code_at(bcp(thread), method(thread));
42 }
43 static bool already_resolved(JavaThread *thread) { return cache_entry(thread)->is_resolved(code(thread)); }
44 static Bytecode* bytecode(JavaThread *thread) { return Bytecode_at(bcp(thread)); }
45 static int get_index_u1(JavaThread *thread, Bytecodes::Code bc)
46 { return bytecode(thread)->get_index_u1(bc); }
47 static int get_index_u2(JavaThread *thread, Bytecodes::Code bc)
48 { return bytecode(thread)->get_index_u2(bc); }
49 static int get_index_u2_cpcache(JavaThread *thread, Bytecodes::Code bc)
50 { return bytecode(thread)->get_index_u2_cpcache(bc); }
51 static int number_of_dimensions(JavaThread *thread) { return bcp(thread)[3]; }
52
53 static ConstantPoolCacheEntry* cache_entry_at(JavaThread *thread, int i) { return method(thread)->constants()->cache()->entry_at(i); }
54 static ConstantPoolCacheEntry* cache_entry(JavaThread *thread) { return cache_entry_at(thread, Bytes::get_native_u2(bcp(thread) + 1)); }
55 static void note_trap(JavaThread *thread, int reason, TRAPS);
56
57 // Inner work method for Interpreter's frequency counter overflow
58 static nmethod* frequency_counter_overflow_inner(JavaThread* thread, address branch_bcp);
59
60 public:
61 // Constants
62 static void ldc (JavaThread* thread, bool wide);
63 static void resolve_ldc (JavaThread* thread, Bytecodes::Code bytecode);
64
65 // Allocation
66 static void _new (JavaThread* thread, constantPoolOopDesc* pool, int index);
67 static void newarray (JavaThread* thread, BasicType type, jint size);
68 static void anewarray (JavaThread* thread, constantPoolOopDesc* pool, int index, jint size);
69 static void multianewarray(JavaThread* thread, jint* first_size_address);
70 static void register_finalizer(JavaThread* thread, oopDesc* obj);
71
72 // Quicken instance-of and check-cast bytecodes
73 static void quicken_io_cc(JavaThread* thread);
74
75 // Exceptions thrown by the interpreter
76 static void throw_AbstractMethodError(JavaThread* thread);
77 static void throw_IncompatibleClassChangeError(JavaThread* thread);
78 static void throw_StackOverflowError(JavaThread* thread);
79 static void throw_ArrayIndexOutOfBoundsException(JavaThread* thread, char* name, jint index);
80 static void throw_ClassCastException(JavaThread* thread, oopDesc* obj);
81 static void throw_WrongMethodTypeException(JavaThread* thread, oopDesc* mtype = NULL, oopDesc* mhandle = NULL);
82 static void create_exception(JavaThread* thread, char* name, char* message);
83 static void create_klass_exception(JavaThread* thread, char* name, oopDesc* obj);
84 static address exception_handler_for_exception(JavaThread* thread, oopDesc* exception);
85 static void throw_pending_exception(JavaThread* thread);
86
87 // Statics & fields
88 static void resolve_get_put(JavaThread* thread, Bytecodes::Code bytecode);
89
90 // Synchronization
91 static void monitorenter(JavaThread* thread, BasicObjectLock* elem);
92 static void monitorexit (JavaThread* thread, BasicObjectLock* elem);
93
94 static void throw_illegal_monitor_state_exception(JavaThread* thread);
95 static void new_illegal_monitor_state_exception(JavaThread* thread);
96
97 // Calls
98 static void resolve_invoke (JavaThread* thread, Bytecodes::Code bytecode);
99 static void resolve_invokedynamic(JavaThread* thread);
100
101 // Breakpoints
102 static void _breakpoint(JavaThread* thread, methodOopDesc* method, address bcp);
103 static Bytecodes::Code get_original_bytecode_at(JavaThread* thread, methodOopDesc* method, address bcp);
104 static void set_original_bytecode_at(JavaThread* thread, methodOopDesc* method, address bcp, Bytecodes::Code new_code);
105 static bool is_breakpoint(JavaThread *thread) { return Bytecodes::code_or_bp_at(bcp(thread)) == Bytecodes::_breakpoint; }
106
107 // Safepoints
108 static void at_safepoint(JavaThread* thread);
109
110 // Debugger support
111 static void post_field_access(JavaThread *thread, oopDesc* obj,
112 ConstantPoolCacheEntry *cp_entry);
113 static void post_field_modification(JavaThread *thread, oopDesc* obj,
114 ConstantPoolCacheEntry *cp_entry, jvalue *value);
115 static void post_method_entry(JavaThread *thread);
116 static void post_method_exit (JavaThread *thread);
117 static int interpreter_contains(address pc);
118
119 // Native signature handlers
120 static void prepare_native_call(JavaThread* thread, methodOopDesc* method);
121 static address slow_signature_handler(JavaThread* thread,
122 methodOopDesc* method,
123 intptr_t* from, intptr_t* to);
124
125 #if defined(IA32) || defined(AMD64)
126 // Popframe support (only needed on x86 and AMD64)
127 static void popframe_move_outgoing_args(JavaThread* thread, void* src_address, void* dest_address);
128 #endif
129
130 // Platform dependent stuff
131 #include "incls/_interpreterRT_pd.hpp.incl"
132
133 // Interpreter's frequency counter overflow
134 static nmethod* frequency_counter_overflow(JavaThread* thread, address branch_bcp);
135
136 // Interpreter profiling support
137 static jint bcp_to_di(methodOopDesc* method, address cur_bcp);
138 static jint profile_method(JavaThread* thread, address cur_bcp);
139 static void update_mdp_for_ret(JavaThread* thread, int bci);
140 #ifdef ASSERT
141 static void verify_mdp(methodOopDesc* method, address bcp, address mdp);
142 #endif // ASSERT
143 };
144
145
146 class SignatureHandlerLibrary: public AllStatic {
147 public:
148 enum { buffer_size = 1*K }; // the size of the temporary code buffer
149 enum { blob_size = 32*K }; // the size of a handler code blob.
150
151 private:
152 static BufferBlob* _handler_blob; // the current buffer blob containing the generated handlers
153 static address _handler; // next available address within _handler_blob;
154 static GrowableArray<uint64_t>* _fingerprints; // the fingerprint collection
155 static GrowableArray<address>* _handlers; // the corresponding handlers
156 static address _buffer; // the temporary code buffer
157
158 static address set_handler_blob();
159 static void initialize();
160 static address set_handler(CodeBuffer* buffer);
161 static void pd_set_handler(address handler);
162
163 public:
164 static void add(methodHandle method);
165 };