Mercurial > hg > truffle
annotate src/cpu/x86/vm/interp_masm_x86_32.cpp @ 15847:9e172511971d
make FixedNodeProbabilityCache behave better in the presence of dead code
author | Lukas Stadler <lukas.stadler@oracle.com> |
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date | Thu, 22 May 2014 14:04:55 +0200 |
parents | ea79ab313e98 |
children | d3f14809b051 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved. |
0 | 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 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #include "precompiled.hpp" |
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26 #include "interp_masm_x86.hpp" |
1972 | 27 #include "interpreter/interpreter.hpp" |
28 #include "interpreter/interpreterRuntime.hpp" | |
29 #include "oops/arrayOop.hpp" | |
30 #include "oops/markOop.hpp" | |
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31 #include "oops/methodData.hpp" |
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32 #include "oops/method.hpp" |
1972 | 33 #include "prims/jvmtiExport.hpp" |
34 #include "prims/jvmtiRedefineClassesTrace.hpp" | |
35 #include "prims/jvmtiThreadState.hpp" | |
36 #include "runtime/basicLock.hpp" | |
37 #include "runtime/biasedLocking.hpp" | |
38 #include "runtime/sharedRuntime.hpp" | |
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39 #include "runtime/thread.inline.hpp" |
0 | 40 |
41 | |
42 // Implementation of InterpreterMacroAssembler | |
43 #ifdef CC_INTERP | |
44 void InterpreterMacroAssembler::get_method(Register reg) { | |
304 | 45 movptr(reg, Address(rbp, -(sizeof(BytecodeInterpreter) + 2 * wordSize))); |
46 movptr(reg, Address(reg, byte_offset_of(BytecodeInterpreter, _method))); | |
0 | 47 } |
48 #endif // CC_INTERP | |
49 | |
50 | |
51 #ifndef CC_INTERP | |
52 void InterpreterMacroAssembler::call_VM_leaf_base( | |
53 address entry_point, | |
54 int number_of_arguments | |
55 ) { | |
56 // interpreter specific | |
57 // | |
58 // Note: No need to save/restore bcp & locals (rsi & rdi) pointer | |
59 // since these are callee saved registers and no blocking/ | |
60 // GC can happen in leaf calls. | |
61 // Further Note: DO NOT save/restore bcp/locals. If a caller has | |
62 // already saved them so that it can use rsi/rdi as temporaries | |
63 // then a save/restore here will DESTROY the copy the caller | |
64 // saved! There used to be a save_bcp() that only happened in | |
65 // the ASSERT path (no restore_bcp). Which caused bizarre failures | |
66 // when jvm built with ASSERTs. | |
67 #ifdef ASSERT | |
68 { Label L; | |
304 | 69 cmpptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD); |
0 | 70 jcc(Assembler::equal, L); |
71 stop("InterpreterMacroAssembler::call_VM_leaf_base: last_sp != NULL"); | |
72 bind(L); | |
73 } | |
74 #endif | |
75 // super call | |
76 MacroAssembler::call_VM_leaf_base(entry_point, number_of_arguments); | |
77 // interpreter specific | |
78 | |
79 // Used to ASSERT that rsi/rdi were equal to frame's bcp/locals | |
80 // but since they may not have been saved (and we don't want to | |
81 // save them here (see note above) the assert is invalid. | |
82 } | |
83 | |
84 | |
85 void InterpreterMacroAssembler::call_VM_base( | |
86 Register oop_result, | |
87 Register java_thread, | |
88 Register last_java_sp, | |
89 address entry_point, | |
90 int number_of_arguments, | |
91 bool check_exceptions | |
92 ) { | |
93 #ifdef ASSERT | |
94 { Label L; | |
304 | 95 cmpptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD); |
0 | 96 jcc(Assembler::equal, L); |
97 stop("InterpreterMacroAssembler::call_VM_base: last_sp != NULL"); | |
98 bind(L); | |
99 } | |
100 #endif /* ASSERT */ | |
101 // interpreter specific | |
102 // | |
103 // Note: Could avoid restoring locals ptr (callee saved) - however doesn't | |
104 // really make a difference for these runtime calls, since they are | |
105 // slow anyway. Btw., bcp must be saved/restored since it may change | |
106 // due to GC. | |
107 assert(java_thread == noreg , "not expecting a precomputed java thread"); | |
108 save_bcp(); | |
109 // super call | |
110 MacroAssembler::call_VM_base(oop_result, java_thread, last_java_sp, entry_point, number_of_arguments, check_exceptions); | |
111 // interpreter specific | |
112 restore_bcp(); | |
113 restore_locals(); | |
114 } | |
115 | |
116 | |
117 void InterpreterMacroAssembler::check_and_handle_popframe(Register java_thread) { | |
118 if (JvmtiExport::can_pop_frame()) { | |
119 Label L; | |
120 // Initiate popframe handling only if it is not already being processed. If the flag | |
121 // has the popframe_processing bit set, it means that this code is called *during* popframe | |
122 // handling - we don't want to reenter. | |
123 Register pop_cond = java_thread; // Not clear if any other register is available... | |
124 movl(pop_cond, Address(java_thread, JavaThread::popframe_condition_offset())); | |
125 testl(pop_cond, JavaThread::popframe_pending_bit); | |
126 jcc(Assembler::zero, L); | |
127 testl(pop_cond, JavaThread::popframe_processing_bit); | |
128 jcc(Assembler::notZero, L); | |
129 // Call Interpreter::remove_activation_preserving_args_entry() to get the | |
130 // address of the same-named entrypoint in the generated interpreter code. | |
131 call_VM_leaf(CAST_FROM_FN_PTR(address, Interpreter::remove_activation_preserving_args_entry)); | |
132 jmp(rax); | |
133 bind(L); | |
134 get_thread(java_thread); | |
135 } | |
136 } | |
137 | |
138 | |
139 void InterpreterMacroAssembler::load_earlyret_value(TosState state) { | |
140 get_thread(rcx); | |
141 movl(rcx, Address(rcx, JavaThread::jvmti_thread_state_offset())); | |
142 const Address tos_addr (rcx, JvmtiThreadState::earlyret_tos_offset()); | |
143 const Address oop_addr (rcx, JvmtiThreadState::earlyret_oop_offset()); | |
144 const Address val_addr (rcx, JvmtiThreadState::earlyret_value_offset()); | |
145 const Address val_addr1(rcx, JvmtiThreadState::earlyret_value_offset() | |
146 + in_ByteSize(wordSize)); | |
147 switch (state) { | |
304 | 148 case atos: movptr(rax, oop_addr); |
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149 movptr(oop_addr, NULL_WORD); |
0 | 150 verify_oop(rax, state); break; |
304 | 151 case ltos: |
152 movl(rdx, val_addr1); // fall through | |
0 | 153 case btos: // fall through |
154 case ctos: // fall through | |
155 case stos: // fall through | |
156 case itos: movl(rax, val_addr); break; | |
157 case ftos: fld_s(val_addr); break; | |
158 case dtos: fld_d(val_addr); break; | |
159 case vtos: /* nothing to do */ break; | |
160 default : ShouldNotReachHere(); | |
161 } | |
162 // Clean up tos value in the thread object | |
304 | 163 movl(tos_addr, (int32_t) ilgl); |
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164 movptr(val_addr, NULL_WORD); |
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165 NOT_LP64(movptr(val_addr1, NULL_WORD)); |
0 | 166 } |
167 | |
168 | |
169 void InterpreterMacroAssembler::check_and_handle_earlyret(Register java_thread) { | |
170 if (JvmtiExport::can_force_early_return()) { | |
171 Label L; | |
172 Register tmp = java_thread; | |
304 | 173 movptr(tmp, Address(tmp, JavaThread::jvmti_thread_state_offset())); |
174 testptr(tmp, tmp); | |
0 | 175 jcc(Assembler::zero, L); // if (thread->jvmti_thread_state() == NULL) exit; |
176 | |
177 // Initiate earlyret handling only if it is not already being processed. | |
178 // If the flag has the earlyret_processing bit set, it means that this code | |
179 // is called *during* earlyret handling - we don't want to reenter. | |
180 movl(tmp, Address(tmp, JvmtiThreadState::earlyret_state_offset())); | |
181 cmpl(tmp, JvmtiThreadState::earlyret_pending); | |
182 jcc(Assembler::notEqual, L); | |
183 | |
184 // Call Interpreter::remove_activation_early_entry() to get the address of the | |
185 // same-named entrypoint in the generated interpreter code. | |
186 get_thread(java_thread); | |
304 | 187 movptr(tmp, Address(java_thread, JavaThread::jvmti_thread_state_offset())); |
0 | 188 pushl(Address(tmp, JvmtiThreadState::earlyret_tos_offset())); |
189 call_VM_leaf(CAST_FROM_FN_PTR(address, Interpreter::remove_activation_early_entry), 1); | |
190 jmp(rax); | |
191 bind(L); | |
192 get_thread(java_thread); | |
193 } | |
194 } | |
195 | |
196 | |
197 void InterpreterMacroAssembler::get_unsigned_2_byte_index_at_bcp(Register reg, int bcp_offset) { | |
198 assert(bcp_offset >= 0, "bcp is still pointing to start of bytecode"); | |
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199 load_unsigned_short(reg, Address(rsi, bcp_offset)); |
304 | 200 bswapl(reg); |
0 | 201 shrl(reg, 16); |
202 } | |
203 | |
204 | |
1565 | 205 void InterpreterMacroAssembler::get_cache_index_at_bcp(Register reg, int bcp_offset, size_t index_size) { |
0 | 206 assert(bcp_offset > 0, "bcp is still pointing to start of bytecode"); |
1565 | 207 if (index_size == sizeof(u2)) { |
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208 load_unsigned_short(reg, Address(rsi, bcp_offset)); |
1565 | 209 } else if (index_size == sizeof(u4)) { |
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210 assert(EnableInvokeDynamic, "giant index used only for JSR 292"); |
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211 movl(reg, Address(rsi, bcp_offset)); |
1108 | 212 // Check if the secondary index definition is still ~x, otherwise |
213 // we have to change the following assembler code to calculate the | |
214 // plain index. | |
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215 assert(ConstantPool::decode_invokedynamic_index(~123) == 123, "else change next line"); |
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216 notl(reg); // convert to plain index |
1565 | 217 } else if (index_size == sizeof(u1)) { |
218 load_unsigned_byte(reg, Address(rsi, bcp_offset)); | |
219 } else { | |
220 ShouldNotReachHere(); | |
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221 } |
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222 } |
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223 |
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224 |
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225 void InterpreterMacroAssembler::get_cache_and_index_at_bcp(Register cache, Register index, |
1565 | 226 int bcp_offset, size_t index_size) { |
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227 assert_different_registers(cache, index); |
1565 | 228 get_cache_index_at_bcp(index, bcp_offset, index_size); |
304 | 229 movptr(cache, Address(rbp, frame::interpreter_frame_cache_offset * wordSize)); |
0 | 230 assert(sizeof(ConstantPoolCacheEntry) == 4*wordSize, "adjust code below"); |
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231 assert(exact_log2(in_words(ConstantPoolCacheEntry::size())) == 2, "else change next line"); |
304 | 232 shlptr(index, 2); // convert from field index to ConstantPoolCacheEntry index |
0 | 233 } |
234 | |
235 | |
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236 void InterpreterMacroAssembler::get_cache_and_index_and_bytecode_at_bcp(Register cache, |
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237 Register index, |
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238 Register bytecode, |
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239 int byte_no, |
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240 int bcp_offset, |
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241 size_t index_size) { |
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242 get_cache_and_index_at_bcp(cache, index, bcp_offset, index_size); |
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243 movptr(bytecode, Address(cache, index, Address::times_ptr, ConstantPoolCache::base_offset() + ConstantPoolCacheEntry::indices_offset())); |
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244 const int shift_count = (1 + byte_no) * BitsPerByte; |
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245 assert((byte_no == TemplateTable::f1_byte && shift_count == ConstantPoolCacheEntry::bytecode_1_shift) || |
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246 (byte_no == TemplateTable::f2_byte && shift_count == ConstantPoolCacheEntry::bytecode_2_shift), |
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247 "correct shift count"); |
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248 shrptr(bytecode, shift_count); |
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249 assert(ConstantPoolCacheEntry::bytecode_1_mask == ConstantPoolCacheEntry::bytecode_2_mask, "common mask"); |
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250 andptr(bytecode, ConstantPoolCacheEntry::bytecode_1_mask); |
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251 } |
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252 |
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253 |
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254 void InterpreterMacroAssembler::get_cache_entry_pointer_at_bcp(Register cache, Register tmp, |
1565 | 255 int bcp_offset, size_t index_size) { |
0 | 256 assert(cache != tmp, "must use different register"); |
1565 | 257 get_cache_index_at_bcp(tmp, bcp_offset, index_size); |
0 | 258 assert(sizeof(ConstantPoolCacheEntry) == 4*wordSize, "adjust code below"); |
259 // convert from field index to ConstantPoolCacheEntry index | |
260 // and from word offset to byte offset | |
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261 assert(exact_log2(in_bytes(ConstantPoolCacheEntry::size_in_bytes())) == 2 + LogBytesPerWord, "else change next line"); |
0 | 262 shll(tmp, 2 + LogBytesPerWord); |
304 | 263 movptr(cache, Address(rbp, frame::interpreter_frame_cache_offset * wordSize)); |
0 | 264 // skip past the header |
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265 addptr(cache, in_bytes(ConstantPoolCache::base_offset())); |
304 | 266 addptr(cache, tmp); // construct pointer to cache entry |
0 | 267 } |
268 | |
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269 void InterpreterMacroAssembler::get_method_counters(Register method, |
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270 Register mcs, Label& skip) { |
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271 Label has_counters; |
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272 movptr(mcs, Address(method, Method::method_counters_offset())); |
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273 testptr(mcs, mcs); |
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274 jcc(Assembler::notZero, has_counters); |
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275 call_VM(noreg, CAST_FROM_FN_PTR(address, |
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276 InterpreterRuntime::build_method_counters), method); |
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277 movptr(mcs, Address(method,Method::method_counters_offset())); |
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278 testptr(mcs, mcs); |
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279 jcc(Assembler::zero, skip); // No MethodCounters allocated, OutOfMemory |
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280 bind(has_counters); |
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281 } |
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282 |
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283 // Load object from cpool->resolved_references(index) |
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284 void InterpreterMacroAssembler::load_resolved_reference_at_index( |
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285 Register result, Register index) { |
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286 assert_different_registers(result, index); |
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287 // convert from field index to resolved_references() index and from |
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288 // word index to byte offset. Since this is a java object, it can be compressed |
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289 Register tmp = index; // reuse |
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290 shll(tmp, LogBytesPerHeapOop); |
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291 |
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292 get_constant_pool(result); |
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293 // load pointer for resolved_references[] objArray |
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294 movptr(result, Address(result, ConstantPool::resolved_references_offset_in_bytes())); |
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295 // JNIHandles::resolve(obj); |
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296 movptr(result, Address(result, 0)); |
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297 // Add in the index |
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298 addptr(result, tmp); |
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299 load_heap_oop(result, Address(result, arrayOopDesc::base_offset_in_bytes(T_OBJECT))); |
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300 } |
0 | 301 |
302 // Generate a subtype check: branch to ok_is_subtype if sub_klass is | |
303 // a subtype of super_klass. EAX holds the super_klass. Blows ECX. | |
304 // Resets EDI to locals. Register sub_klass cannot be any of the above. | |
305 void InterpreterMacroAssembler::gen_subtype_check( Register Rsub_klass, Label &ok_is_subtype ) { | |
306 assert( Rsub_klass != rax, "rax, holds superklass" ); | |
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307 assert( Rsub_klass != rcx, "used as a temp" ); |
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308 assert( Rsub_klass != rdi, "used as a temp, restored from locals" ); |
0 | 309 |
310 // Profile the not-null value's klass. | |
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311 profile_typecheck(rcx, Rsub_klass, rdi); // blows rcx, reloads rdi |
0 | 312 |
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313 // Do the check. |
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314 check_klass_subtype(Rsub_klass, rax, rcx, ok_is_subtype); // blows rcx |
0 | 315 |
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316 // Profile the failure of the check. |
0 | 317 profile_typecheck_failed(rcx); // blows rcx |
318 } | |
319 | |
320 void InterpreterMacroAssembler::f2ieee() { | |
321 if (IEEEPrecision) { | |
322 fstp_s(Address(rsp, 0)); | |
323 fld_s(Address(rsp, 0)); | |
324 } | |
325 } | |
326 | |
327 | |
328 void InterpreterMacroAssembler::d2ieee() { | |
329 if (IEEEPrecision) { | |
330 fstp_d(Address(rsp, 0)); | |
331 fld_d(Address(rsp, 0)); | |
332 } | |
333 } | |
334 | |
335 // Java Expression Stack | |
336 | |
337 void InterpreterMacroAssembler::pop_ptr(Register r) { | |
304 | 338 pop(r); |
0 | 339 } |
340 | |
341 void InterpreterMacroAssembler::pop_i(Register r) { | |
304 | 342 pop(r); |
0 | 343 } |
344 | |
345 void InterpreterMacroAssembler::pop_l(Register lo, Register hi) { | |
304 | 346 pop(lo); |
347 pop(hi); | |
0 | 348 } |
349 | |
350 void InterpreterMacroAssembler::pop_f() { | |
351 fld_s(Address(rsp, 0)); | |
304 | 352 addptr(rsp, 1 * wordSize); |
0 | 353 } |
354 | |
355 void InterpreterMacroAssembler::pop_d() { | |
356 fld_d(Address(rsp, 0)); | |
304 | 357 addptr(rsp, 2 * wordSize); |
0 | 358 } |
359 | |
360 | |
361 void InterpreterMacroAssembler::pop(TosState state) { | |
362 switch (state) { | |
363 case atos: pop_ptr(rax); break; | |
364 case btos: // fall through | |
365 case ctos: // fall through | |
366 case stos: // fall through | |
367 case itos: pop_i(rax); break; | |
368 case ltos: pop_l(rax, rdx); break; | |
369 case ftos: pop_f(); break; | |
370 case dtos: pop_d(); break; | |
371 case vtos: /* nothing to do */ break; | |
372 default : ShouldNotReachHere(); | |
373 } | |
374 verify_oop(rax, state); | |
375 } | |
376 | |
377 void InterpreterMacroAssembler::push_ptr(Register r) { | |
304 | 378 push(r); |
0 | 379 } |
380 | |
381 void InterpreterMacroAssembler::push_i(Register r) { | |
304 | 382 push(r); |
0 | 383 } |
384 | |
385 void InterpreterMacroAssembler::push_l(Register lo, Register hi) { | |
304 | 386 push(hi); |
387 push(lo); | |
0 | 388 } |
389 | |
390 void InterpreterMacroAssembler::push_f() { | |
391 // Do not schedule for no AGI! Never write beyond rsp! | |
304 | 392 subptr(rsp, 1 * wordSize); |
0 | 393 fstp_s(Address(rsp, 0)); |
394 } | |
395 | |
396 void InterpreterMacroAssembler::push_d(Register r) { | |
1506 | 397 // Do not schedule for no AGI! Never write beyond rsp! |
398 subptr(rsp, 2 * wordSize); | |
399 fstp_d(Address(rsp, 0)); | |
0 | 400 } |
401 | |
402 | |
403 void InterpreterMacroAssembler::push(TosState state) { | |
404 verify_oop(rax, state); | |
405 switch (state) { | |
406 case atos: push_ptr(rax); break; | |
407 case btos: // fall through | |
408 case ctos: // fall through | |
409 case stos: // fall through | |
410 case itos: push_i(rax); break; | |
411 case ltos: push_l(rax, rdx); break; | |
412 case ftos: push_f(); break; | |
413 case dtos: push_d(rax); break; | |
414 case vtos: /* nothing to do */ break; | |
415 default : ShouldNotReachHere(); | |
416 } | |
417 } | |
418 | |
419 | |
1506 | 420 // Helpers for swap and dup |
421 void InterpreterMacroAssembler::load_ptr(int n, Register val) { | |
304 | 422 movptr(val, Address(rsp, Interpreter::expr_offset_in_bytes(n))); |
0 | 423 } |
424 | |
1506 | 425 void InterpreterMacroAssembler::store_ptr(int n, Register val) { |
426 movptr(Address(rsp, Interpreter::expr_offset_in_bytes(n)), val); | |
0 | 427 } |
428 | |
710 | 429 void InterpreterMacroAssembler::prepare_to_jump_from_interpreted() { |
0 | 430 // set sender sp |
304 | 431 lea(rsi, Address(rsp, wordSize)); |
0 | 432 // record last_sp |
304 | 433 movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), rsi); |
710 | 434 } |
435 | |
436 | |
437 // Jump to from_interpreted entry of a call unless single stepping is possible | |
438 // in this thread in which case we must call the i2i entry | |
439 void InterpreterMacroAssembler::jump_from_interpreted(Register method, Register temp) { | |
440 prepare_to_jump_from_interpreted(); | |
0 | 441 |
442 if (JvmtiExport::can_post_interpreter_events()) { | |
443 Label run_compiled_code; | |
444 // JVMTI events, such as single-stepping, are implemented partly by avoiding running | |
445 // compiled code in threads for which the event is enabled. Check here for | |
446 // interp_only_mode if these events CAN be enabled. | |
447 get_thread(temp); | |
448 // interp_only is an int, on little endian it is sufficient to test the byte only | |
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449 // Is a cmpl faster? |
0 | 450 cmpb(Address(temp, JavaThread::interp_only_mode_offset()), 0); |
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451 jccb(Assembler::zero, run_compiled_code); |
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452 jmp(Address(method, Method::interpreter_entry_offset())); |
0 | 453 bind(run_compiled_code); |
454 } | |
455 | |
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456 jmp(Address(method, Method::from_interpreted_offset())); |
0 | 457 |
458 } | |
459 | |
460 | |
461 // The following two routines provide a hook so that an implementation | |
462 // can schedule the dispatch in two parts. Intel does not do this. | |
463 void InterpreterMacroAssembler::dispatch_prolog(TosState state, int step) { | |
464 // Nothing Intel-specific to be done here. | |
465 } | |
466 | |
467 void InterpreterMacroAssembler::dispatch_epilog(TosState state, int step) { | |
468 dispatch_next(state, step); | |
469 } | |
470 | |
471 void InterpreterMacroAssembler::dispatch_base(TosState state, address* table, | |
472 bool verifyoop) { | |
473 verify_FPU(1, state); | |
474 if (VerifyActivationFrameSize) { | |
475 Label L; | |
304 | 476 mov(rcx, rbp); |
477 subptr(rcx, rsp); | |
0 | 478 int min_frame_size = (frame::link_offset - frame::interpreter_frame_initial_sp_offset) * wordSize; |
304 | 479 cmpptr(rcx, min_frame_size); |
0 | 480 jcc(Assembler::greaterEqual, L); |
481 stop("broken stack frame"); | |
482 bind(L); | |
483 } | |
484 if (verifyoop) verify_oop(rax, state); | |
304 | 485 Address index(noreg, rbx, Address::times_ptr); |
0 | 486 ExternalAddress tbl((address)table); |
487 ArrayAddress dispatch(tbl, index); | |
488 jump(dispatch); | |
489 } | |
490 | |
491 | |
492 void InterpreterMacroAssembler::dispatch_only(TosState state) { | |
493 dispatch_base(state, Interpreter::dispatch_table(state)); | |
494 } | |
495 | |
496 | |
497 void InterpreterMacroAssembler::dispatch_only_normal(TosState state) { | |
498 dispatch_base(state, Interpreter::normal_table(state)); | |
499 } | |
500 | |
501 void InterpreterMacroAssembler::dispatch_only_noverify(TosState state) { | |
502 dispatch_base(state, Interpreter::normal_table(state), false); | |
503 } | |
504 | |
505 | |
506 void InterpreterMacroAssembler::dispatch_next(TosState state, int step) { | |
507 // load next bytecode (load before advancing rsi to prevent AGI) | |
508 load_unsigned_byte(rbx, Address(rsi, step)); | |
509 // advance rsi | |
510 increment(rsi, step); | |
511 dispatch_base(state, Interpreter::dispatch_table(state)); | |
512 } | |
513 | |
514 | |
515 void InterpreterMacroAssembler::dispatch_via(TosState state, address* table) { | |
516 // load current bytecode | |
517 load_unsigned_byte(rbx, Address(rsi, 0)); | |
518 dispatch_base(state, table); | |
519 } | |
520 | |
521 // remove activation | |
522 // | |
523 // Unlock the receiver if this is a synchronized method. | |
524 // Unlock any Java monitors from syncronized blocks. | |
525 // Remove the activation from the stack. | |
526 // | |
527 // If there are locked Java monitors | |
528 // If throw_monitor_exception | |
529 // throws IllegalMonitorStateException | |
530 // Else if install_monitor_exception | |
531 // installs IllegalMonitorStateException | |
532 // Else | |
533 // no error processing | |
534 void InterpreterMacroAssembler::remove_activation(TosState state, Register ret_addr, | |
535 bool throw_monitor_exception, | |
536 bool install_monitor_exception, | |
537 bool notify_jvmdi) { | |
538 // Note: Registers rax, rdx and FPU ST(0) may be in use for the result | |
539 // check if synchronized method | |
540 Label unlocked, unlock, no_unlock; | |
541 | |
542 get_thread(rcx); | |
543 const Address do_not_unlock_if_synchronized(rcx, | |
544 in_bytes(JavaThread::do_not_unlock_if_synchronized_offset())); | |
545 | |
546 movbool(rbx, do_not_unlock_if_synchronized); | |
304 | 547 mov(rdi,rbx); |
0 | 548 movbool(do_not_unlock_if_synchronized, false); // reset the flag |
549 | |
304 | 550 movptr(rbx, Address(rbp, frame::interpreter_frame_method_offset * wordSize)); // get method access flags |
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551 movl(rcx, Address(rbx, Method::access_flags_offset())); |
0 | 552 |
553 testl(rcx, JVM_ACC_SYNCHRONIZED); | |
554 jcc(Assembler::zero, unlocked); | |
555 | |
556 // Don't unlock anything if the _do_not_unlock_if_synchronized flag | |
557 // is set. | |
304 | 558 mov(rcx,rdi); |
0 | 559 testbool(rcx); |
560 jcc(Assembler::notZero, no_unlock); | |
561 | |
562 // unlock monitor | |
563 push(state); // save result | |
564 | |
565 // BasicObjectLock will be first in list, since this is a synchronized method. However, need | |
566 // to check that the object has not been unlocked by an explicit monitorexit bytecode. | |
567 const Address monitor(rbp, frame::interpreter_frame_initial_sp_offset * wordSize - (int)sizeof(BasicObjectLock)); | |
304 | 568 lea (rdx, monitor); // address of first monitor |
0 | 569 |
304 | 570 movptr (rax, Address(rdx, BasicObjectLock::obj_offset_in_bytes())); |
571 testptr(rax, rax); | |
572 jcc (Assembler::notZero, unlock); | |
0 | 573 |
574 pop(state); | |
575 if (throw_monitor_exception) { | |
576 empty_FPU_stack(); // remove possible return value from FPU-stack, otherwise stack could overflow | |
577 | |
578 // Entry already unlocked, need to throw exception | |
579 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_illegal_monitor_state_exception)); | |
580 should_not_reach_here(); | |
581 } else { | |
582 // Monitor already unlocked during a stack unroll. | |
583 // If requested, install an illegal_monitor_state_exception. | |
584 // Continue with stack unrolling. | |
585 if (install_monitor_exception) { | |
586 empty_FPU_stack(); // remove possible return value from FPU-stack, otherwise stack could overflow | |
587 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::new_illegal_monitor_state_exception)); | |
588 } | |
589 jmp(unlocked); | |
590 } | |
591 | |
592 bind(unlock); | |
593 unlock_object(rdx); | |
594 pop(state); | |
595 | |
596 // Check that for block-structured locking (i.e., that all locked objects has been unlocked) | |
597 bind(unlocked); | |
598 | |
599 // rax, rdx: Might contain return value | |
600 | |
601 // Check that all monitors are unlocked | |
602 { | |
603 Label loop, exception, entry, restart; | |
604 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize; | |
605 const Address monitor_block_top(rbp, frame::interpreter_frame_monitor_block_top_offset * wordSize); | |
606 const Address monitor_block_bot(rbp, frame::interpreter_frame_initial_sp_offset * wordSize); | |
607 | |
608 bind(restart); | |
304 | 609 movptr(rcx, monitor_block_top); // points to current entry, starting with top-most entry |
610 lea(rbx, monitor_block_bot); // points to word before bottom of monitor block | |
0 | 611 jmp(entry); |
612 | |
613 // Entry already locked, need to throw exception | |
614 bind(exception); | |
615 | |
616 if (throw_monitor_exception) { | |
617 empty_FPU_stack(); // remove possible return value from FPU-stack, otherwise stack could overflow | |
618 | |
619 // Throw exception | |
620 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_illegal_monitor_state_exception)); | |
621 should_not_reach_here(); | |
622 } else { | |
623 // Stack unrolling. Unlock object and install illegal_monitor_exception | |
624 // Unlock does not block, so don't have to worry about the frame | |
625 | |
626 push(state); | |
304 | 627 mov(rdx, rcx); |
0 | 628 unlock_object(rdx); |
629 pop(state); | |
630 | |
631 if (install_monitor_exception) { | |
632 empty_FPU_stack(); // remove possible return value from FPU-stack, otherwise stack could overflow | |
633 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::new_illegal_monitor_state_exception)); | |
634 } | |
635 | |
636 jmp(restart); | |
637 } | |
638 | |
639 bind(loop); | |
304 | 640 cmpptr(Address(rcx, BasicObjectLock::obj_offset_in_bytes()), (int32_t)NULL_WORD); // check if current entry is used |
0 | 641 jcc(Assembler::notEqual, exception); |
642 | |
304 | 643 addptr(rcx, entry_size); // otherwise advance to next entry |
0 | 644 bind(entry); |
304 | 645 cmpptr(rcx, rbx); // check if bottom reached |
0 | 646 jcc(Assembler::notEqual, loop); // if not at bottom then check this entry |
647 } | |
648 | |
649 bind(no_unlock); | |
650 | |
651 // jvmti support | |
652 if (notify_jvmdi) { | |
653 notify_method_exit(state, NotifyJVMTI); // preserve TOSCA | |
654 } else { | |
655 notify_method_exit(state, SkipNotifyJVMTI); // preserve TOSCA | |
656 } | |
657 | |
658 // remove activation | |
304 | 659 movptr(rbx, Address(rbp, frame::interpreter_frame_sender_sp_offset * wordSize)); // get sender sp |
0 | 660 leave(); // remove frame anchor |
304 | 661 pop(ret_addr); // get return address |
662 mov(rsp, rbx); // set sp to sender sp | |
0 | 663 if (UseSSE) { |
664 // float and double are returned in xmm register in SSE-mode | |
665 if (state == ftos && UseSSE >= 1) { | |
304 | 666 subptr(rsp, wordSize); |
0 | 667 fstp_s(Address(rsp, 0)); |
668 movflt(xmm0, Address(rsp, 0)); | |
304 | 669 addptr(rsp, wordSize); |
0 | 670 } else if (state == dtos && UseSSE >= 2) { |
304 | 671 subptr(rsp, 2*wordSize); |
0 | 672 fstp_d(Address(rsp, 0)); |
673 movdbl(xmm0, Address(rsp, 0)); | |
304 | 674 addptr(rsp, 2*wordSize); |
0 | 675 } |
676 } | |
677 } | |
678 | |
679 #endif /* !CC_INTERP */ | |
680 | |
681 | |
682 // Lock object | |
683 // | |
684 // Argument: rdx : Points to BasicObjectLock to be used for locking. Must | |
685 // be initialized with object to lock | |
686 void InterpreterMacroAssembler::lock_object(Register lock_reg) { | |
687 assert(lock_reg == rdx, "The argument is only for looks. It must be rdx"); | |
688 | |
689 if (UseHeavyMonitors) { | |
690 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorenter), lock_reg); | |
691 } else { | |
692 | |
693 Label done; | |
694 | |
695 const Register swap_reg = rax; // Must use rax, for cmpxchg instruction | |
696 const Register obj_reg = rcx; // Will contain the oop | |
697 | |
698 const int obj_offset = BasicObjectLock::obj_offset_in_bytes(); | |
699 const int lock_offset = BasicObjectLock::lock_offset_in_bytes (); | |
700 const int mark_offset = lock_offset + BasicLock::displaced_header_offset_in_bytes(); | |
701 | |
702 Label slow_case; | |
703 | |
704 // Load object pointer into obj_reg %rcx | |
304 | 705 movptr(obj_reg, Address(lock_reg, obj_offset)); |
0 | 706 |
707 if (UseBiasedLocking) { | |
708 // Note: we use noreg for the temporary register since it's hard | |
709 // to come up with a free register on all incoming code paths | |
710 biased_locking_enter(lock_reg, obj_reg, swap_reg, noreg, false, done, &slow_case); | |
711 } | |
712 | |
713 // Load immediate 1 into swap_reg %rax, | |
304 | 714 movptr(swap_reg, (int32_t)1); |
0 | 715 |
716 // Load (object->mark() | 1) into swap_reg %rax, | |
304 | 717 orptr(swap_reg, Address(obj_reg, 0)); |
0 | 718 |
719 // Save (object->mark() | 1) into BasicLock's displaced header | |
304 | 720 movptr(Address(lock_reg, mark_offset), swap_reg); |
0 | 721 |
722 assert(lock_offset == 0, "displached header must be first word in BasicObjectLock"); | |
723 if (os::is_MP()) { | |
724 lock(); | |
725 } | |
304 | 726 cmpxchgptr(lock_reg, Address(obj_reg, 0)); |
0 | 727 if (PrintBiasedLockingStatistics) { |
728 cond_inc32(Assembler::zero, | |
729 ExternalAddress((address) BiasedLocking::fast_path_entry_count_addr())); | |
730 } | |
731 jcc(Assembler::zero, done); | |
732 | |
733 // Test if the oopMark is an obvious stack pointer, i.e., | |
734 // 1) (mark & 3) == 0, and | |
735 // 2) rsp <= mark < mark + os::pagesize() | |
736 // | |
737 // These 3 tests can be done by evaluating the following | |
738 // expression: ((mark - rsp) & (3 - os::vm_page_size())), | |
739 // assuming both stack pointer and pagesize have their | |
740 // least significant 2 bits clear. | |
741 // NOTE: the oopMark is in swap_reg %rax, as the result of cmpxchg | |
304 | 742 subptr(swap_reg, rsp); |
743 andptr(swap_reg, 3 - os::vm_page_size()); | |
0 | 744 |
745 // Save the test result, for recursive case, the result is zero | |
304 | 746 movptr(Address(lock_reg, mark_offset), swap_reg); |
0 | 747 |
748 if (PrintBiasedLockingStatistics) { | |
749 cond_inc32(Assembler::zero, | |
750 ExternalAddress((address) BiasedLocking::fast_path_entry_count_addr())); | |
751 } | |
752 jcc(Assembler::zero, done); | |
753 | |
754 bind(slow_case); | |
755 | |
756 // Call the runtime routine for slow case | |
757 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorenter), lock_reg); | |
758 | |
759 bind(done); | |
760 } | |
761 } | |
762 | |
763 | |
764 // Unlocks an object. Used in monitorexit bytecode and remove_activation. | |
765 // | |
766 // Argument: rdx : Points to BasicObjectLock structure for lock | |
767 // Throw an IllegalMonitorException if object is not locked by current thread | |
768 // | |
769 // Uses: rax, rbx, rcx, rdx | |
770 void InterpreterMacroAssembler::unlock_object(Register lock_reg) { | |
771 assert(lock_reg == rdx, "The argument is only for looks. It must be rdx"); | |
772 | |
773 if (UseHeavyMonitors) { | |
774 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorexit), lock_reg); | |
775 } else { | |
776 Label done; | |
777 | |
778 const Register swap_reg = rax; // Must use rax, for cmpxchg instruction | |
779 const Register header_reg = rbx; // Will contain the old oopMark | |
780 const Register obj_reg = rcx; // Will contain the oop | |
781 | |
782 save_bcp(); // Save in case of exception | |
783 | |
784 // Convert from BasicObjectLock structure to object and BasicLock structure | |
785 // Store the BasicLock address into %rax, | |
304 | 786 lea(swap_reg, Address(lock_reg, BasicObjectLock::lock_offset_in_bytes())); |
0 | 787 |
788 // Load oop into obj_reg(%rcx) | |
304 | 789 movptr(obj_reg, Address(lock_reg, BasicObjectLock::obj_offset_in_bytes ())); |
0 | 790 |
791 // Free entry | |
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792 movptr(Address(lock_reg, BasicObjectLock::obj_offset_in_bytes()), NULL_WORD); |
0 | 793 |
794 if (UseBiasedLocking) { | |
795 biased_locking_exit(obj_reg, header_reg, done); | |
796 } | |
797 | |
798 // Load the old header from BasicLock structure | |
304 | 799 movptr(header_reg, Address(swap_reg, BasicLock::displaced_header_offset_in_bytes())); |
0 | 800 |
801 // Test for recursion | |
304 | 802 testptr(header_reg, header_reg); |
0 | 803 |
804 // zero for recursive case | |
805 jcc(Assembler::zero, done); | |
806 | |
807 // Atomic swap back the old header | |
808 if (os::is_MP()) lock(); | |
304 | 809 cmpxchgptr(header_reg, Address(obj_reg, 0)); |
0 | 810 |
811 // zero for recursive case | |
812 jcc(Assembler::zero, done); | |
813 | |
814 // Call the runtime routine for slow case. | |
304 | 815 movptr(Address(lock_reg, BasicObjectLock::obj_offset_in_bytes()), obj_reg); // restore obj |
0 | 816 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorexit), lock_reg); |
817 | |
818 bind(done); | |
819 | |
820 restore_bcp(); | |
821 } | |
822 } | |
823 | |
824 | |
825 #ifndef CC_INTERP | |
826 | |
827 // Test ImethodDataPtr. If it is null, continue at the specified label | |
828 void InterpreterMacroAssembler::test_method_data_pointer(Register mdp, Label& zero_continue) { | |
829 assert(ProfileInterpreter, "must be profiling interpreter"); | |
304 | 830 movptr(mdp, Address(rbp, frame::interpreter_frame_mdx_offset * wordSize)); |
831 testptr(mdp, mdp); | |
0 | 832 jcc(Assembler::zero, zero_continue); |
833 } | |
834 | |
835 | |
836 // Set the method data pointer for the current bcp. | |
837 void InterpreterMacroAssembler::set_method_data_pointer_for_bcp() { | |
838 assert(ProfileInterpreter, "must be profiling interpreter"); | |
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839 Label set_mdp; |
304 | 840 push(rax); |
841 push(rbx); | |
0 | 842 |
843 get_method(rbx); | |
844 // Test MDO to avoid the call if it is NULL. | |
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845 movptr(rax, Address(rbx, in_bytes(Method::method_data_offset()))); |
304 | 846 testptr(rax, rax); |
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847 jcc(Assembler::zero, set_mdp); |
0 | 848 // rbx,: method |
849 // rsi: bcp | |
850 call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::bcp_to_di), rbx, rsi); | |
851 // rax,: mdi | |
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852 // mdo is guaranteed to be non-zero here, we checked for it before the call. |
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853 movptr(rbx, Address(rbx, in_bytes(Method::method_data_offset()))); |
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854 addptr(rbx, in_bytes(MethodData::data_offset())); |
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855 addptr(rax, rbx); |
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856 bind(set_mdp); |
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857 movptr(Address(rbp, frame::interpreter_frame_mdx_offset * wordSize), rax); |
304 | 858 pop(rbx); |
859 pop(rax); | |
0 | 860 } |
861 | |
862 void InterpreterMacroAssembler::verify_method_data_pointer() { | |
863 assert(ProfileInterpreter, "must be profiling interpreter"); | |
864 #ifdef ASSERT | |
865 Label verify_continue; | |
304 | 866 push(rax); |
867 push(rbx); | |
868 push(rcx); | |
869 push(rdx); | |
0 | 870 test_method_data_pointer(rcx, verify_continue); // If mdp is zero, continue |
871 get_method(rbx); | |
872 | |
873 // If the mdp is valid, it will point to a DataLayout header which is | |
874 // consistent with the bcp. The converse is highly probable also. | |
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875 load_unsigned_short(rdx, Address(rcx, in_bytes(DataLayout::bci_offset()))); |
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876 addptr(rdx, Address(rbx, Method::const_offset())); |
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877 lea(rdx, Address(rdx, ConstMethod::codes_offset())); |
304 | 878 cmpptr(rdx, rsi); |
0 | 879 jcc(Assembler::equal, verify_continue); |
880 // rbx,: method | |
881 // rsi: bcp | |
882 // rcx: mdp | |
883 call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::verify_mdp), rbx, rsi, rcx); | |
884 bind(verify_continue); | |
304 | 885 pop(rdx); |
886 pop(rcx); | |
887 pop(rbx); | |
888 pop(rax); | |
0 | 889 #endif // ASSERT |
890 } | |
891 | |
892 | |
893 void InterpreterMacroAssembler::set_mdp_data_at(Register mdp_in, int constant, Register value) { | |
304 | 894 // %%% this seems to be used to store counter data which is surely 32bits |
895 // however 64bit side stores 64 bits which seems wrong | |
0 | 896 assert(ProfileInterpreter, "must be profiling interpreter"); |
897 Address data(mdp_in, constant); | |
304 | 898 movptr(data, value); |
0 | 899 } |
900 | |
901 | |
902 void InterpreterMacroAssembler::increment_mdp_data_at(Register mdp_in, | |
903 int constant, | |
904 bool decrement) { | |
905 // Counter address | |
906 Address data(mdp_in, constant); | |
907 | |
908 increment_mdp_data_at(data, decrement); | |
909 } | |
910 | |
911 | |
912 void InterpreterMacroAssembler::increment_mdp_data_at(Address data, | |
913 bool decrement) { | |
914 | |
915 assert( DataLayout::counter_increment==1, "flow-free idiom only works with 1" ); | |
916 assert(ProfileInterpreter, "must be profiling interpreter"); | |
917 | |
304 | 918 // %%% 64bit treats this as 64 bit which seems unlikely |
0 | 919 if (decrement) { |
920 // Decrement the register. Set condition codes. | |
921 addl(data, -DataLayout::counter_increment); | |
922 // If the decrement causes the counter to overflow, stay negative | |
923 Label L; | |
924 jcc(Assembler::negative, L); | |
925 addl(data, DataLayout::counter_increment); | |
926 bind(L); | |
927 } else { | |
928 assert(DataLayout::counter_increment == 1, | |
929 "flow-free idiom only works with 1"); | |
930 // Increment the register. Set carry flag. | |
931 addl(data, DataLayout::counter_increment); | |
932 // If the increment causes the counter to overflow, pull back by 1. | |
933 sbbl(data, 0); | |
934 } | |
935 } | |
936 | |
937 | |
938 void InterpreterMacroAssembler::increment_mdp_data_at(Register mdp_in, | |
939 Register reg, | |
940 int constant, | |
941 bool decrement) { | |
942 Address data(mdp_in, reg, Address::times_1, constant); | |
943 | |
944 increment_mdp_data_at(data, decrement); | |
945 } | |
946 | |
947 | |
948 void InterpreterMacroAssembler::set_mdp_flag_at(Register mdp_in, int flag_byte_constant) { | |
949 assert(ProfileInterpreter, "must be profiling interpreter"); | |
950 int header_offset = in_bytes(DataLayout::header_offset()); | |
951 int header_bits = DataLayout::flag_mask_to_header_mask(flag_byte_constant); | |
952 // Set the flag | |
953 orl(Address(mdp_in, header_offset), header_bits); | |
954 } | |
955 | |
956 | |
957 | |
958 void InterpreterMacroAssembler::test_mdp_data_at(Register mdp_in, | |
959 int offset, | |
960 Register value, | |
961 Register test_value_out, | |
962 Label& not_equal_continue) { | |
963 assert(ProfileInterpreter, "must be profiling interpreter"); | |
964 if (test_value_out == noreg) { | |
304 | 965 cmpptr(value, Address(mdp_in, offset)); |
0 | 966 } else { |
967 // Put the test value into a register, so caller can use it: | |
304 | 968 movptr(test_value_out, Address(mdp_in, offset)); |
969 cmpptr(test_value_out, value); | |
0 | 970 } |
971 jcc(Assembler::notEqual, not_equal_continue); | |
972 } | |
973 | |
974 | |
975 void InterpreterMacroAssembler::update_mdp_by_offset(Register mdp_in, int offset_of_disp) { | |
976 assert(ProfileInterpreter, "must be profiling interpreter"); | |
977 Address disp_address(mdp_in, offset_of_disp); | |
304 | 978 addptr(mdp_in,disp_address); |
979 movptr(Address(rbp, frame::interpreter_frame_mdx_offset * wordSize), mdp_in); | |
0 | 980 } |
981 | |
982 | |
983 void InterpreterMacroAssembler::update_mdp_by_offset(Register mdp_in, Register reg, int offset_of_disp) { | |
984 assert(ProfileInterpreter, "must be profiling interpreter"); | |
985 Address disp_address(mdp_in, reg, Address::times_1, offset_of_disp); | |
304 | 986 addptr(mdp_in, disp_address); |
987 movptr(Address(rbp, frame::interpreter_frame_mdx_offset * wordSize), mdp_in); | |
0 | 988 } |
989 | |
990 | |
991 void InterpreterMacroAssembler::update_mdp_by_constant(Register mdp_in, int constant) { | |
992 assert(ProfileInterpreter, "must be profiling interpreter"); | |
304 | 993 addptr(mdp_in, constant); |
994 movptr(Address(rbp, frame::interpreter_frame_mdx_offset * wordSize), mdp_in); | |
0 | 995 } |
996 | |
997 | |
998 void InterpreterMacroAssembler::update_mdp_for_ret(Register return_bci) { | |
999 assert(ProfileInterpreter, "must be profiling interpreter"); | |
304 | 1000 push(return_bci); // save/restore across call_VM |
0 | 1001 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::update_mdp_for_ret), return_bci); |
304 | 1002 pop(return_bci); |
0 | 1003 } |
1004 | |
1005 | |
1006 void InterpreterMacroAssembler::profile_taken_branch(Register mdp, Register bumped_count) { | |
1007 if (ProfileInterpreter) { | |
1008 Label profile_continue; | |
1009 | |
1010 // If no method data exists, go to profile_continue. | |
1011 // Otherwise, assign to mdp | |
1012 test_method_data_pointer(mdp, profile_continue); | |
1013 | |
1014 // We are taking a branch. Increment the taken count. | |
1015 // We inline increment_mdp_data_at to return bumped_count in a register | |
1016 //increment_mdp_data_at(mdp, in_bytes(JumpData::taken_offset())); | |
1017 Address data(mdp, in_bytes(JumpData::taken_offset())); | |
304 | 1018 |
1019 // %%% 64bit treats these cells as 64 bit but they seem to be 32 bit | |
0 | 1020 movl(bumped_count,data); |
1021 assert( DataLayout::counter_increment==1, "flow-free idiom only works with 1" ); | |
1022 addl(bumped_count, DataLayout::counter_increment); | |
1023 sbbl(bumped_count, 0); | |
1024 movl(data,bumped_count); // Store back out | |
1025 | |
1026 // The method data pointer needs to be updated to reflect the new target. | |
1027 update_mdp_by_offset(mdp, in_bytes(JumpData::displacement_offset())); | |
1028 bind (profile_continue); | |
1029 } | |
1030 } | |
1031 | |
1032 | |
1033 void InterpreterMacroAssembler::profile_not_taken_branch(Register mdp) { | |
1034 if (ProfileInterpreter) { | |
1035 Label profile_continue; | |
1036 | |
1037 // If no method data exists, go to profile_continue. | |
1038 test_method_data_pointer(mdp, profile_continue); | |
1039 | |
1040 // We are taking a branch. Increment the not taken count. | |
1041 increment_mdp_data_at(mdp, in_bytes(BranchData::not_taken_offset())); | |
1042 | |
1043 // The method data pointer needs to be updated to correspond to the next bytecode | |
1044 update_mdp_by_constant(mdp, in_bytes(BranchData::branch_data_size())); | |
1045 bind (profile_continue); | |
1046 } | |
1047 } | |
1048 | |
1049 void InterpreterMacroAssembler::profile_call(Register mdp) { | |
1050 if (ProfileInterpreter) { | |
1051 Label profile_continue; | |
1052 | |
1053 // If no method data exists, go to profile_continue. | |
1054 test_method_data_pointer(mdp, profile_continue); | |
1055 | |
1056 // We are making a call. Increment the count. | |
1057 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset())); | |
1058 | |
1059 // The method data pointer needs to be updated to reflect the new target. | |
1060 update_mdp_by_constant(mdp, in_bytes(CounterData::counter_data_size())); | |
1061 bind (profile_continue); | |
1062 } | |
1063 } | |
1064 | |
1065 | |
1066 void InterpreterMacroAssembler::profile_final_call(Register mdp) { | |
1067 if (ProfileInterpreter) { | |
1068 Label profile_continue; | |
1069 | |
1070 // If no method data exists, go to profile_continue. | |
1071 test_method_data_pointer(mdp, profile_continue); | |
1072 | |
1073 // We are making a call. Increment the count. | |
1074 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset())); | |
1075 | |
1076 // The method data pointer needs to be updated to reflect the new target. | |
1077 update_mdp_by_constant(mdp, in_bytes(VirtualCallData::virtual_call_data_size())); | |
1078 bind (profile_continue); | |
1079 } | |
1080 } | |
1081 | |
1082 | |
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1083 void InterpreterMacroAssembler::profile_virtual_call(Register receiver, Register mdp, |
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1084 Register reg2, |
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1085 bool receiver_can_be_null) { |
0 | 1086 if (ProfileInterpreter) { |
1087 Label profile_continue; | |
1088 | |
1089 // If no method data exists, go to profile_continue. | |
1090 test_method_data_pointer(mdp, profile_continue); | |
1091 | |
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1092 Label skip_receiver_profile; |
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1093 if (receiver_can_be_null) { |
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1094 Label not_null; |
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1095 testptr(receiver, receiver); |
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1096 jccb(Assembler::notZero, not_null); |
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1097 // We are making a call. Increment the count for null receiver. |
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1098 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset())); |
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1099 jmp(skip_receiver_profile); |
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1100 bind(not_null); |
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1101 } |
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1102 |
0 | 1103 // Record the receiver type. |
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1104 record_klass_in_profile(receiver, mdp, reg2, true); |
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1105 bind(skip_receiver_profile); |
0 | 1106 |
1107 // The method data pointer needs to be updated to reflect the new target. | |
1108 update_mdp_by_constant(mdp, | |
1109 in_bytes(VirtualCallData:: | |
1110 virtual_call_data_size())); | |
1111 bind(profile_continue); | |
1112 } | |
1113 } | |
1114 | |
1115 | |
1116 void InterpreterMacroAssembler::record_klass_in_profile_helper( | |
1117 Register receiver, Register mdp, | |
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1118 Register reg2, int start_row, |
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1119 Label& done, bool is_virtual_call) { |
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1120 if (TypeProfileWidth == 0) { |
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1121 if (is_virtual_call) { |
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1122 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset())); |
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1123 } |
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1124 return; |
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1125 } |
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1126 |
0 | 1127 int last_row = VirtualCallData::row_limit() - 1; |
1128 assert(start_row <= last_row, "must be work left to do"); | |
1129 // Test this row for both the receiver and for null. | |
1130 // Take any of three different outcomes: | |
1131 // 1. found receiver => increment count and goto done | |
1132 // 2. found null => keep looking for case 1, maybe allocate this cell | |
1133 // 3. found something else => keep looking for cases 1 and 2 | |
1134 // Case 3 is handled by a recursive call. | |
1135 for (int row = start_row; row <= last_row; row++) { | |
1136 Label next_test; | |
1137 bool test_for_null_also = (row == start_row); | |
1138 | |
1139 // See if the receiver is receiver[n]. | |
1140 int recvr_offset = in_bytes(VirtualCallData::receiver_offset(row)); | |
1141 test_mdp_data_at(mdp, recvr_offset, receiver, | |
1142 (test_for_null_also ? reg2 : noreg), | |
1143 next_test); | |
1144 // (Reg2 now contains the receiver from the CallData.) | |
1145 | |
1146 // The receiver is receiver[n]. Increment count[n]. | |
1147 int count_offset = in_bytes(VirtualCallData::receiver_count_offset(row)); | |
1148 increment_mdp_data_at(mdp, count_offset); | |
1149 jmp(done); | |
1150 bind(next_test); | |
1151 | |
1152 if (row == start_row) { | |
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1153 Label found_null; |
0 | 1154 // Failed the equality check on receiver[n]... Test for null. |
304 | 1155 testptr(reg2, reg2); |
0 | 1156 if (start_row == last_row) { |
1157 // The only thing left to do is handle the null case. | |
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1158 if (is_virtual_call) { |
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1159 jccb(Assembler::zero, found_null); |
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1160 // Receiver did not match any saved receiver and there is no empty row for it. |
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1161 // Increment total counter to indicate polymorphic case. |
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1162 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset())); |
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1163 jmp(done); |
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1164 bind(found_null); |
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1165 } else { |
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1166 jcc(Assembler::notZero, done); |
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1167 } |
0 | 1168 break; |
1169 } | |
1170 // Since null is rare, make it be the branch-taken case. | |
1171 jcc(Assembler::zero, found_null); | |
1172 | |
1173 // Put all the "Case 3" tests here. | |
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1174 record_klass_in_profile_helper(receiver, mdp, reg2, start_row + 1, done, is_virtual_call); |
0 | 1175 |
1176 // Found a null. Keep searching for a matching receiver, | |
1177 // but remember that this is an empty (unused) slot. | |
1178 bind(found_null); | |
1179 } | |
1180 } | |
1181 | |
1182 // In the fall-through case, we found no matching receiver, but we | |
1183 // observed the receiver[start_row] is NULL. | |
1184 | |
1185 // Fill in the receiver field and increment the count. | |
1186 int recvr_offset = in_bytes(VirtualCallData::receiver_offset(start_row)); | |
1187 set_mdp_data_at(mdp, recvr_offset, receiver); | |
1188 int count_offset = in_bytes(VirtualCallData::receiver_count_offset(start_row)); | |
3960 | 1189 movptr(reg2, (intptr_t)DataLayout::counter_increment); |
0 | 1190 set_mdp_data_at(mdp, count_offset, reg2); |
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1191 if (start_row > 0) { |
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1192 jmp(done); |
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1193 } |
0 | 1194 } |
1195 | |
1196 void InterpreterMacroAssembler::record_klass_in_profile(Register receiver, | |
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1197 Register mdp, Register reg2, |
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1198 bool is_virtual_call) { |
0 | 1199 assert(ProfileInterpreter, "must be profiling"); |
1200 Label done; | |
1201 | |
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1202 record_klass_in_profile_helper(receiver, mdp, reg2, 0, done, is_virtual_call); |
0 | 1203 |
1204 bind (done); | |
1205 } | |
1206 | |
1207 void InterpreterMacroAssembler::profile_ret(Register return_bci, Register mdp) { | |
1208 if (ProfileInterpreter) { | |
1209 Label profile_continue; | |
1210 uint row; | |
1211 | |
1212 // If no method data exists, go to profile_continue. | |
1213 test_method_data_pointer(mdp, profile_continue); | |
1214 | |
1215 // Update the total ret count. | |
1216 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset())); | |
1217 | |
1218 for (row = 0; row < RetData::row_limit(); row++) { | |
1219 Label next_test; | |
1220 | |
1221 // See if return_bci is equal to bci[n]: | |
1222 test_mdp_data_at(mdp, in_bytes(RetData::bci_offset(row)), return_bci, | |
1223 noreg, next_test); | |
1224 | |
1225 // return_bci is equal to bci[n]. Increment the count. | |
1226 increment_mdp_data_at(mdp, in_bytes(RetData::bci_count_offset(row))); | |
1227 | |
1228 // The method data pointer needs to be updated to reflect the new target. | |
1229 update_mdp_by_offset(mdp, in_bytes(RetData::bci_displacement_offset(row))); | |
1230 jmp(profile_continue); | |
1231 bind(next_test); | |
1232 } | |
1233 | |
1234 update_mdp_for_ret(return_bci); | |
1235 | |
1236 bind (profile_continue); | |
1237 } | |
1238 } | |
1239 | |
1240 | |
1241 void InterpreterMacroAssembler::profile_null_seen(Register mdp) { | |
1242 if (ProfileInterpreter) { | |
1243 Label profile_continue; | |
1244 | |
1245 // If no method data exists, go to profile_continue. | |
1246 test_method_data_pointer(mdp, profile_continue); | |
1247 | |
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1248 set_mdp_flag_at(mdp, BitData::null_seen_byte_constant()); |
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1249 |
0 | 1250 // The method data pointer needs to be updated. |
1251 int mdp_delta = in_bytes(BitData::bit_data_size()); | |
1252 if (TypeProfileCasts) { | |
1253 mdp_delta = in_bytes(VirtualCallData::virtual_call_data_size()); | |
1254 } | |
1255 update_mdp_by_constant(mdp, mdp_delta); | |
1256 | |
1257 bind (profile_continue); | |
1258 } | |
1259 } | |
1260 | |
1261 | |
1262 void InterpreterMacroAssembler::profile_typecheck_failed(Register mdp) { | |
1263 if (ProfileInterpreter && TypeProfileCasts) { | |
1264 Label profile_continue; | |
1265 | |
1266 // If no method data exists, go to profile_continue. | |
1267 test_method_data_pointer(mdp, profile_continue); | |
1268 | |
1269 int count_offset = in_bytes(CounterData::count_offset()); | |
1270 // Back up the address, since we have already bumped the mdp. | |
1271 count_offset -= in_bytes(VirtualCallData::virtual_call_data_size()); | |
1272 | |
1273 // *Decrement* the counter. We expect to see zero or small negatives. | |
1274 increment_mdp_data_at(mdp, count_offset, true); | |
1275 | |
1276 bind (profile_continue); | |
1277 } | |
1278 } | |
1279 | |
1280 | |
1281 void InterpreterMacroAssembler::profile_typecheck(Register mdp, Register klass, Register reg2) | |
1282 { | |
1283 if (ProfileInterpreter) { | |
1284 Label profile_continue; | |
1285 | |
1286 // If no method data exists, go to profile_continue. | |
1287 test_method_data_pointer(mdp, profile_continue); | |
1288 | |
1289 // The method data pointer needs to be updated. | |
1290 int mdp_delta = in_bytes(BitData::bit_data_size()); | |
1291 if (TypeProfileCasts) { | |
1292 mdp_delta = in_bytes(VirtualCallData::virtual_call_data_size()); | |
1293 | |
1294 // Record the object type. | |
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1295 record_klass_in_profile(klass, mdp, reg2, false); |
0 | 1296 assert(reg2 == rdi, "we know how to fix this blown reg"); |
1297 restore_locals(); // Restore EDI | |
1298 } | |
1299 update_mdp_by_constant(mdp, mdp_delta); | |
1300 | |
1301 bind(profile_continue); | |
1302 } | |
1303 } | |
1304 | |
1305 | |
1306 void InterpreterMacroAssembler::profile_switch_default(Register mdp) { | |
1307 if (ProfileInterpreter) { | |
1308 Label profile_continue; | |
1309 | |
1310 // If no method data exists, go to profile_continue. | |
1311 test_method_data_pointer(mdp, profile_continue); | |
1312 | |
1313 // Update the default case count | |
1314 increment_mdp_data_at(mdp, in_bytes(MultiBranchData::default_count_offset())); | |
1315 | |
1316 // The method data pointer needs to be updated. | |
1317 update_mdp_by_offset(mdp, in_bytes(MultiBranchData::default_displacement_offset())); | |
1318 | |
1319 bind (profile_continue); | |
1320 } | |
1321 } | |
1322 | |
1323 | |
1324 void InterpreterMacroAssembler::profile_switch_case(Register index, Register mdp, Register reg2) { | |
1325 if (ProfileInterpreter) { | |
1326 Label profile_continue; | |
1327 | |
1328 // If no method data exists, go to profile_continue. | |
1329 test_method_data_pointer(mdp, profile_continue); | |
1330 | |
1331 // Build the base (index * per_case_size_in_bytes()) + case_array_offset_in_bytes() | |
3960 | 1332 movptr(reg2, (intptr_t)in_bytes(MultiBranchData::per_case_size())); |
304 | 1333 // index is positive and so should have correct value if this code were |
1334 // used on 64bits | |
1335 imulptr(index, reg2); | |
1336 addptr(index, in_bytes(MultiBranchData::case_array_offset())); | |
0 | 1337 |
1338 // Update the case count | |
1339 increment_mdp_data_at(mdp, index, in_bytes(MultiBranchData::relative_count_offset())); | |
1340 | |
1341 // The method data pointer needs to be updated. | |
1342 update_mdp_by_offset(mdp, index, in_bytes(MultiBranchData::relative_displacement_offset())); | |
1343 | |
1344 bind (profile_continue); | |
1345 } | |
1346 } | |
1347 | |
1348 #endif // !CC_INTERP | |
1349 | |
1350 | |
1351 | |
1352 void InterpreterMacroAssembler::verify_oop(Register reg, TosState state) { | |
1353 if (state == atos) MacroAssembler::verify_oop(reg); | |
1354 } | |
1355 | |
1356 | |
1357 #ifndef CC_INTERP | |
1358 void InterpreterMacroAssembler::verify_FPU(int stack_depth, TosState state) { | |
1359 if (state == ftos || state == dtos) MacroAssembler::verify_FPU(stack_depth); | |
1360 } | |
1361 | |
1362 #endif /* CC_INTERP */ | |
1363 | |
1364 | |
1365 void InterpreterMacroAssembler::notify_method_entry() { | |
1366 // Whenever JVMTI is interp_only_mode, method entry/exit events are sent to | |
1367 // track stack depth. If it is possible to enter interp_only_mode we add | |
1368 // the code to check if the event should be sent. | |
1369 if (JvmtiExport::can_post_interpreter_events()) { | |
1370 Label L; | |
1371 get_thread(rcx); | |
1372 movl(rcx, Address(rcx, JavaThread::interp_only_mode_offset())); | |
1373 testl(rcx,rcx); | |
1374 jcc(Assembler::zero, L); | |
1375 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::post_method_entry)); | |
1376 bind(L); | |
1377 } | |
1378 | |
1379 { | |
1380 SkipIfEqual skip_if(this, &DTraceMethodProbes, 0); | |
1381 get_thread(rcx); | |
1382 get_method(rbx); | |
1383 call_VM_leaf( | |
1384 CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_entry), rcx, rbx); | |
1385 } | |
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1386 |
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1387 // RedefineClasses() tracing support for obsolete method entry |
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1388 if (RC_TRACE_IN_RANGE(0x00001000, 0x00002000)) { |
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1389 get_thread(rcx); |
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1390 get_method(rbx); |
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1391 call_VM_leaf( |
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1392 CAST_FROM_FN_PTR(address, SharedRuntime::rc_trace_method_entry), |
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1393 rcx, rbx); |
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1394 } |
0 | 1395 } |
1396 | |
1397 | |
1398 void InterpreterMacroAssembler::notify_method_exit( | |
1399 TosState state, NotifyMethodExitMode mode) { | |
1400 // Whenever JVMTI is interp_only_mode, method entry/exit events are sent to | |
1401 // track stack depth. If it is possible to enter interp_only_mode we add | |
1402 // the code to check if the event should be sent. | |
1403 if (mode == NotifyJVMTI && JvmtiExport::can_post_interpreter_events()) { | |
1404 Label L; | |
1405 // Note: frame::interpreter_frame_result has a dependency on how the | |
1406 // method result is saved across the call to post_method_exit. If this | |
1407 // is changed then the interpreter_frame_result implementation will | |
1408 // need to be updated too. | |
1409 | |
1410 // For c++ interpreter the result is always stored at a known location in the frame | |
1411 // template interpreter will leave it on the top of the stack. | |
1412 NOT_CC_INTERP(push(state);) | |
1413 get_thread(rcx); | |
1414 movl(rcx, Address(rcx, JavaThread::interp_only_mode_offset())); | |
1415 testl(rcx,rcx); | |
1416 jcc(Assembler::zero, L); | |
1417 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::post_method_exit)); | |
1418 bind(L); | |
1419 NOT_CC_INTERP(pop(state);) | |
1420 } | |
1421 | |
1422 { | |
1423 SkipIfEqual skip_if(this, &DTraceMethodProbes, 0); | |
304 | 1424 NOT_CC_INTERP(push(state)); |
0 | 1425 get_thread(rbx); |
1426 get_method(rcx); | |
1427 call_VM_leaf( | |
1428 CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_exit), | |
1429 rbx, rcx); | |
304 | 1430 NOT_CC_INTERP(pop(state)); |
0 | 1431 } |
1432 } | |
1783 | 1433 |
1434 // Jump if ((*counter_addr += increment) & mask) satisfies the condition. | |
1435 void InterpreterMacroAssembler::increment_mask_and_jump(Address counter_addr, | |
1436 int increment, int mask, | |
1437 Register scratch, bool preloaded, | |
1438 Condition cond, Label* where) { | |
1439 if (!preloaded) { | |
1440 movl(scratch, counter_addr); | |
1441 } | |
1442 incrementl(scratch, increment); | |
1443 movl(counter_addr, scratch); | |
1444 andl(scratch, mask); | |
1445 jcc(cond, *where); | |
1446 } |