Tue, 05 Apr 2011 14:12:31 -0700
7010070: Update all 2010 Oracle-changed OpenJDK files to have the proper copyright dates - second pass
Summary: Update the copyright to be 2010 on all changed files in OpenJDK
Reviewed-by: ohair
1 /*
2 * Copyright (c) 1997, 2011, 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 */
25 #ifndef SHARE_VM_CODE_COMPILEDIC_HPP
26 #define SHARE_VM_CODE_COMPILEDIC_HPP
28 #include "interpreter/linkResolver.hpp"
29 #include "oops/compiledICHolderKlass.hpp"
30 #include "oops/compiledICHolderOop.hpp"
31 #include "oops/klassOop.hpp"
32 #ifdef TARGET_ARCH_x86
33 # include "nativeInst_x86.hpp"
34 #endif
35 #ifdef TARGET_ARCH_sparc
36 # include "nativeInst_sparc.hpp"
37 #endif
38 #ifdef TARGET_ARCH_zero
39 # include "nativeInst_zero.hpp"
40 #endif
41 #ifdef TARGET_ARCH_arm
42 # include "nativeInst_arm.hpp"
43 #endif
44 #ifdef TARGET_ARCH_ppc
45 # include "nativeInst_ppc.hpp"
46 #endif
48 //-----------------------------------------------------------------------------
49 // The CompiledIC represents a compiled inline cache.
50 //
51 // In order to make patching of the inline cache MT-safe, we only allow the following
52 // transitions (when not at a safepoint):
53 //
54 //
55 // [1] --<-- Clean -->--- [1]
56 // / (null) \
57 // / \ /-<-\
58 // / [2] \ / \
59 // Interpreted ---------> Monomorphic | [3]
60 // (compiledICHolderOop) (klassOop) |
61 // \ / \ /
62 // [4] \ / [4] \->-/
63 // \->- Megamorphic -<-/
64 // (methodOop)
65 //
66 // The text in paranteses () refere to the value of the inline cache receiver (mov instruction)
67 //
68 // The numbers in square brackets refere to the kind of transition:
69 // [1]: Initial fixup. Receiver it found from debug information
70 // [2]: Compilation of a method
71 // [3]: Recompilation of a method (note: only entry is changed. The klassOop must stay the same)
72 // [4]: Inline cache miss. We go directly to megamorphic call.
73 //
74 // The class automatically inserts transition stubs (using the InlineCacheBuffer) when an MT-unsafe
75 // transition is made to a stub.
76 //
77 class CompiledIC;
79 class CompiledICInfo {
80 friend class CompiledIC;
81 private:
82 address _entry; // entry point for call
83 Handle _cached_oop; // Value of cached_oop (either in stub or inline cache)
84 bool _is_optimized; // it is an optimized virtual call (i.e., can be statically bound)
85 bool _to_interpreter; // Call it to interpreter
86 public:
87 address entry() const { return _entry; }
88 Handle cached_oop() const { return _cached_oop; }
89 bool is_optimized() const { return _is_optimized; }
90 };
92 class CompiledIC: public ResourceObj {
93 friend class InlineCacheBuffer;
94 friend class ICStub;
97 private:
98 NativeCall* _ic_call; // the call instruction
99 oop* _oop_addr; // patchable oop cell for this IC
100 RelocIterator _oops; // iteration over any and all set-oop instructions
101 bool _is_optimized; // an optimized virtual call (i.e., no compiled IC)
103 CompiledIC(NativeCall* ic_call);
104 CompiledIC(Relocation* ic_reloc); // Must be of virtual_call_type/opt_virtual_call_type
106 // low-level inline-cache manipulation. Cannot be accessed directly, since it might not be MT-safe
107 // to change an inline-cache. These changes the underlying inline-cache directly. They *newer* make
108 // changes to a transition stub.
109 void set_ic_destination(address entry_point);
110 void set_cached_oop(oop cache);
112 // Reads the location of the transition stub. This will fail with an assertion, if no transition stub is
113 // associated with the inline cache.
114 address stub_address() const;
115 bool is_in_transition_state() const; // Use InlineCacheBuffer
117 public:
118 // conversion (machine PC to CompiledIC*)
119 friend CompiledIC* CompiledIC_before(address return_addr);
120 friend CompiledIC* CompiledIC_at(address call_site);
121 friend CompiledIC* CompiledIC_at(Relocation* call_site);
123 // Return the cached_oop/destination associated with this inline cache. If the cache currently points
124 // to a transition stub, it will read the values from the transition stub.
125 oop cached_oop() const;
126 address ic_destination() const;
128 bool is_optimized() const { return _is_optimized; }
130 // State
131 bool is_clean() const;
132 bool is_megamorphic() const;
133 bool is_call_to_compiled() const;
134 bool is_call_to_interpreted() const;
136 address end_of_call() { return _ic_call->return_address(); }
138 // MT-safe patching of inline caches. Note: Only safe to call is_xxx when holding the CompiledIC_ock
139 // so you are guaranteed that no patching takes place. The same goes for verify.
140 //
141 // Note: We do not provide any direct access to the stub code, to prevent parts of the code
142 // to manipulate the inline cache in MT-unsafe ways.
143 //
144 // They all takes a TRAP argument, since they can cause a GC if the inline-cache buffer is full.
145 //
146 void set_to_clean(); // Can only be called during a safepoint operation
147 void set_to_monomorphic(const CompiledICInfo& info);
148 void set_to_megamorphic(CallInfo* call_info, Bytecodes::Code bytecode, TRAPS);
150 static void compute_monomorphic_entry(methodHandle method, KlassHandle receiver_klass,
151 bool is_optimized, bool static_bound, CompiledICInfo& info, TRAPS);
153 // Location
154 address instruction_address() const { return _ic_call->instruction_address(); }
156 // Misc
157 void print() PRODUCT_RETURN;
158 void print_compiled_ic() PRODUCT_RETURN;
159 void verify() PRODUCT_RETURN;
160 };
162 inline CompiledIC* CompiledIC_before(address return_addr) {
163 CompiledIC* c_ic = new CompiledIC(nativeCall_before(return_addr));
164 c_ic->verify();
165 return c_ic;
166 }
168 inline CompiledIC* CompiledIC_at(address call_site) {
169 CompiledIC* c_ic = new CompiledIC(nativeCall_at(call_site));
170 c_ic->verify();
171 return c_ic;
172 }
174 inline CompiledIC* CompiledIC_at(Relocation* call_site) {
175 CompiledIC* c_ic = new CompiledIC(call_site);
176 c_ic->verify();
177 return c_ic;
178 }
181 //-----------------------------------------------------------------------------
182 // The CompiledStaticCall represents a call to a static method in the compiled
183 //
184 // Transition diagram of a static call site is somewhat simpler than for an inlined cache:
185 //
186 //
187 // -----<----- Clean ----->-----
188 // / \
189 // / \
190 // compilled code <------------> interpreted code
191 //
192 // Clean: Calls directly to runtime method for fixup
193 // Compiled code: Calls directly to compiled code
194 // Interpreted code: Calls to stub that set methodOop reference
195 //
196 //
197 class CompiledStaticCall;
199 class StaticCallInfo {
200 private:
201 address _entry; // Entrypoint
202 methodHandle _callee; // Callee (used when calling interpreter)
203 bool _to_interpreter; // call to interpreted method (otherwise compiled)
205 friend class CompiledStaticCall;
206 public:
207 address entry() const { return _entry; }
208 methodHandle callee() const { return _callee; }
209 };
212 class CompiledStaticCall: public NativeCall {
213 friend class CompiledIC;
215 // Also used by CompiledIC
216 void set_to_interpreted(methodHandle callee, address entry);
217 bool is_optimized_virtual();
219 public:
220 friend CompiledStaticCall* compiledStaticCall_before(address return_addr);
221 friend CompiledStaticCall* compiledStaticCall_at(address native_call);
222 friend CompiledStaticCall* compiledStaticCall_at(Relocation* call_site);
224 // State
225 bool is_clean() const;
226 bool is_call_to_compiled() const;
227 bool is_call_to_interpreted() const;
229 // Clean static call (will force resolving on next use)
230 void set_to_clean();
232 // Set state. The entry must be the same, as computed by compute_entry.
233 // Computation and setting is split up, since the actions are separate during
234 // a OptoRuntime::resolve_xxx.
235 void set(const StaticCallInfo& info);
237 // Compute entry point given a method
238 static void compute_entry(methodHandle m, StaticCallInfo& info);
240 // Stub support
241 address find_stub();
242 static void set_stub_to_clean(static_stub_Relocation* static_stub);
244 // Misc.
245 void print() PRODUCT_RETURN;
246 void verify() PRODUCT_RETURN;
247 };
250 inline CompiledStaticCall* compiledStaticCall_before(address return_addr) {
251 CompiledStaticCall* st = (CompiledStaticCall*)nativeCall_before(return_addr);
252 st->verify();
253 return st;
254 }
256 inline CompiledStaticCall* compiledStaticCall_at(address native_call) {
257 CompiledStaticCall* st = (CompiledStaticCall*)native_call;
258 st->verify();
259 return st;
260 }
262 inline CompiledStaticCall* compiledStaticCall_at(Relocation* call_site) {
263 return compiledStaticCall_at(call_site->addr());
264 }
266 #endif // SHARE_VM_CODE_COMPILEDIC_HPP