Mercurial > hg > truffle
comparison src/cpu/sparc/vm/compiledIC_sparc.cpp @ 10168:a6e09d6dd8e5
8003853: specify offset of IC load in java_to_interp stub
Summary: refactored code to allow platform-specific differences
Reviewed-by: dlong, twisti
Contributed-by: Goetz Lindenmaier <goetz.lindenmaier@sap.com>
author | dlong |
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date | Wed, 24 Apr 2013 20:55:28 -0400 |
parents | |
children | 36bcc10e01c0 c64b6b0c40c8 |
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10106:42a42da29fd7 | 10168:a6e09d6dd8e5 |
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1 /* | |
2 * Copyright (c) 1997, 2013, 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 #include "precompiled.hpp" | |
26 #include "asm/macroAssembler.inline.hpp" | |
27 #include "code/compiledIC.hpp" | |
28 #include "code/icBuffer.hpp" | |
29 #include "code/nmethod.hpp" | |
30 #include "memory/resourceArea.hpp" | |
31 #include "runtime/mutexLocker.hpp" | |
32 #include "runtime/safepoint.hpp" | |
33 #ifdef COMPILER2 | |
34 #include "opto/matcher.hpp" | |
35 #endif | |
36 | |
37 // Release the CompiledICHolder* associated with this call site is there is one. | |
38 void CompiledIC::cleanup_call_site(virtual_call_Relocation* call_site) { | |
39 // This call site might have become stale so inspect it carefully. | |
40 NativeCall* call = nativeCall_at(call_site->addr()); | |
41 if (is_icholder_entry(call->destination())) { | |
42 NativeMovConstReg* value = nativeMovConstReg_at(call_site->cached_value()); | |
43 InlineCacheBuffer::queue_for_release((CompiledICHolder*)value->data()); | |
44 } | |
45 } | |
46 | |
47 bool CompiledIC::is_icholder_call_site(virtual_call_Relocation* call_site) { | |
48 // This call site might have become stale so inspect it carefully. | |
49 NativeCall* call = nativeCall_at(call_site->addr()); | |
50 return is_icholder_entry(call->destination()); | |
51 } | |
52 | |
53 //----------------------------------------------------------------------------- | |
54 // High-level access to an inline cache. Guaranteed to be MT-safe. | |
55 | |
56 CompiledIC::CompiledIC(nmethod* nm, NativeCall* call) | |
57 : _ic_call(call) | |
58 { | |
59 address ic_call = call->instruction_address(); | |
60 | |
61 assert(ic_call != NULL, "ic_call address must be set"); | |
62 assert(nm != NULL, "must pass nmethod"); | |
63 assert(nm->contains(ic_call), "must be in nmethod"); | |
64 | |
65 // Search for the ic_call at the given address. | |
66 RelocIterator iter(nm, ic_call, ic_call+1); | |
67 bool ret = iter.next(); | |
68 assert(ret == true, "relocInfo must exist at this address"); | |
69 assert(iter.addr() == ic_call, "must find ic_call"); | |
70 if (iter.type() == relocInfo::virtual_call_type) { | |
71 virtual_call_Relocation* r = iter.virtual_call_reloc(); | |
72 _is_optimized = false; | |
73 _value = nativeMovConstReg_at(r->cached_value()); | |
74 } else { | |
75 assert(iter.type() == relocInfo::opt_virtual_call_type, "must be a virtual call"); | |
76 _is_optimized = true; | |
77 _value = NULL; | |
78 } | |
79 } | |
80 | |
81 // ---------------------------------------------------------------------------- | |
82 | |
83 #define __ _masm. | |
84 void CompiledStaticCall::emit_to_interp_stub(CodeBuffer &cbuf) { | |
85 #ifdef COMPILER2 | |
86 // Stub is fixed up when the corresponding call is converted from calling | |
87 // compiled code to calling interpreted code. | |
88 // set (empty), G5 | |
89 // jmp -1 | |
90 | |
91 address mark = cbuf.insts_mark(); // Get mark within main instrs section. | |
92 | |
93 MacroAssembler _masm(&cbuf); | |
94 | |
95 address base = | |
96 __ start_a_stub(to_interp_stub_size()*2); | |
97 if (base == NULL) return; // CodeBuffer::expand failed. | |
98 | |
99 // Static stub relocation stores the instruction address of the call. | |
100 __ relocate(static_stub_Relocation::spec(mark)); | |
101 | |
102 __ set_metadata(NULL, as_Register(Matcher::inline_cache_reg_encode())); | |
103 | |
104 __ set_inst_mark(); | |
105 AddressLiteral addrlit(-1); | |
106 __ JUMP(addrlit, G3, 0); | |
107 | |
108 __ delayed()->nop(); | |
109 | |
110 // Update current stubs pointer and restore code_end. | |
111 __ end_a_stub(); | |
112 #else | |
113 ShouldNotReachHere(); | |
114 #endif | |
115 } | |
116 #undef __ | |
117 | |
118 int CompiledStaticCall::to_interp_stub_size() { | |
119 // This doesn't need to be accurate but it must be larger or equal to | |
120 // the real size of the stub. | |
121 return (NativeMovConstReg::instruction_size + // sethi/setlo; | |
122 NativeJump::instruction_size + // sethi; jmp; nop | |
123 (TraceJumps ? 20 * BytesPerInstWord : 0) ); | |
124 } | |
125 | |
126 // Relocation entries for call stub, compiled java to interpreter. | |
127 int CompiledStaticCall::reloc_to_interp_stub() { | |
128 return 10; // 4 in emit_java_to_interp + 1 in Java_Static_Call | |
129 } | |
130 | |
131 void CompiledStaticCall::set_to_interpreted(methodHandle callee, address entry) { | |
132 address stub = find_stub(); | |
133 guarantee(stub != NULL, "stub not found"); | |
134 | |
135 if (TraceICs) { | |
136 ResourceMark rm; | |
137 tty->print_cr("CompiledStaticCall@" INTPTR_FORMAT ": set_to_interpreted %s", | |
138 instruction_address(), | |
139 callee->name_and_sig_as_C_string()); | |
140 } | |
141 | |
142 // Creation also verifies the object. | |
143 NativeMovConstReg* method_holder = nativeMovConstReg_at(stub); | |
144 NativeJump* jump = nativeJump_at(method_holder->next_instruction_address()); | |
145 | |
146 assert(method_holder->data() == 0 || method_holder->data() == (intptr_t)callee(), | |
147 "a) MT-unsafe modification of inline cache"); | |
148 assert(jump->jump_destination() == (address)-1 || jump->jump_destination() == entry, | |
149 "b) MT-unsafe modification of inline cache"); | |
150 | |
151 // Update stub. | |
152 method_holder->set_data((intptr_t)callee()); | |
153 jump->set_jump_destination(entry); | |
154 | |
155 // Update jump to call. | |
156 set_destination_mt_safe(stub); | |
157 } | |
158 | |
159 void CompiledStaticCall::set_stub_to_clean(static_stub_Relocation* static_stub) { | |
160 assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), "mt unsafe call"); | |
161 // Reset stub. | |
162 address stub = static_stub->addr(); | |
163 assert(stub != NULL, "stub not found"); | |
164 // Creation also verifies the object. | |
165 NativeMovConstReg* method_holder = nativeMovConstReg_at(stub); | |
166 NativeJump* jump = nativeJump_at(method_holder->next_instruction_address()); | |
167 method_holder->set_data(0); | |
168 jump->set_jump_destination((address)-1); | |
169 } | |
170 | |
171 //----------------------------------------------------------------------------- | |
172 // Non-product mode code | |
173 #ifndef PRODUCT | |
174 | |
175 void CompiledStaticCall::verify() { | |
176 // Verify call. | |
177 NativeCall::verify(); | |
178 if (os::is_MP()) { | |
179 verify_alignment(); | |
180 } | |
181 | |
182 // Verify stub. | |
183 address stub = find_stub(); | |
184 assert(stub != NULL, "no stub found for static call"); | |
185 // Creation also verifies the object. | |
186 NativeMovConstReg* method_holder = nativeMovConstReg_at(stub); | |
187 NativeJump* jump = nativeJump_at(method_holder->next_instruction_address()); | |
188 | |
189 // Verify state. | |
190 assert(is_clean() || is_call_to_compiled() || is_call_to_interpreted(), "sanity check"); | |
191 } | |
192 | |
193 #endif // !PRODUCT |