Mercurial > hg > truffle
annotate src/cpu/x86/vm/interp_masm_x86_64.cpp @ 15847:9e172511971d
make FixedNodeProbabilityCache behave better in the presence of dead code
author | Lukas Stadler <lukas.stadler@oracle.com> |
---|---|
date | Thu, 22 May 2014 14:04:55 +0200 |
parents | 096c224171c4 |
children | b51e29501f30 be896a1983c0 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 2003, 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 | |
304 | 44 #ifdef CC_INTERP |
45 void InterpreterMacroAssembler::get_method(Register reg) { | |
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46 movptr(reg, Address(rbp, -((int)sizeof(BytecodeInterpreter) + 2 * wordSize))); |
304 | 47 movptr(reg, Address(reg, byte_offset_of(BytecodeInterpreter, _method))); |
48 } | |
49 #endif // CC_INTERP | |
50 | |
51 #ifndef CC_INTERP | |
52 | |
0 | 53 void InterpreterMacroAssembler::call_VM_leaf_base(address entry_point, |
54 int number_of_arguments) { | |
55 // interpreter specific | |
56 // | |
57 // Note: No need to save/restore bcp & locals (r13 & r14) pointer | |
58 // since these are callee saved registers and no blocking/ | |
59 // GC can happen in leaf calls. | |
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60 // Further Note: DO NOT save/restore bcp/locals. If a caller has |
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61 // already saved them so that it can use esi/edi as temporaries |
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62 // then a save/restore here will DESTROY the copy the caller |
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63 // saved! There used to be a save_bcp() that only happened in |
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64 // the ASSERT path (no restore_bcp). Which caused bizarre failures |
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65 // when jvm built with ASSERTs. |
0 | 66 #ifdef ASSERT |
67 { | |
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:" | |
72 " last_sp != NULL"); | |
73 bind(L); | |
74 } | |
75 #endif | |
76 // super call | |
77 MacroAssembler::call_VM_leaf_base(entry_point, number_of_arguments); | |
78 // interpreter specific | |
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79 // Used to ASSERT that r13/r14 were equal to frame's bcp/locals |
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80 // but since they may not have been saved (and we don't want to |
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81 // save thme here (see note above) the assert is invalid. |
0 | 82 } |
83 | |
84 void InterpreterMacroAssembler::call_VM_base(Register oop_result, | |
85 Register java_thread, | |
86 Register last_java_sp, | |
87 address entry_point, | |
88 int number_of_arguments, | |
89 bool check_exceptions) { | |
90 // interpreter specific | |
91 // | |
92 // Note: Could avoid restoring locals ptr (callee saved) - however doesn't | |
93 // really make a difference for these runtime calls, since they are | |
94 // slow anyway. Btw., bcp must be saved/restored since it may change | |
95 // due to GC. | |
96 // assert(java_thread == noreg , "not expecting a precomputed java thread"); | |
97 save_bcp(); | |
98 #ifdef ASSERT | |
99 { | |
100 Label L; | |
304 | 101 cmpptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD); |
0 | 102 jcc(Assembler::equal, L); |
103 stop("InterpreterMacroAssembler::call_VM_leaf_base:" | |
104 " last_sp != NULL"); | |
105 bind(L); | |
106 } | |
107 #endif /* ASSERT */ | |
108 // super call | |
109 MacroAssembler::call_VM_base(oop_result, noreg, last_java_sp, | |
110 entry_point, number_of_arguments, | |
111 check_exceptions); | |
112 // interpreter specific | |
113 restore_bcp(); | |
114 restore_locals(); | |
115 } | |
116 | |
117 | |
118 void InterpreterMacroAssembler::check_and_handle_popframe(Register java_thread) { | |
119 if (JvmtiExport::can_pop_frame()) { | |
120 Label L; | |
121 // Initiate popframe handling only if it is not already being | |
122 // processed. If the flag has the popframe_processing bit set, it | |
123 // means that this code is called *during* popframe handling - we | |
124 // don't want to reenter. | |
125 // This method is only called just after the call into the vm in | |
126 // call_VM_base, so the arg registers are available. | |
127 movl(c_rarg0, Address(r15_thread, JavaThread::popframe_condition_offset())); | |
128 testl(c_rarg0, JavaThread::popframe_pending_bit); | |
129 jcc(Assembler::zero, L); | |
130 testl(c_rarg0, JavaThread::popframe_processing_bit); | |
131 jcc(Assembler::notZero, L); | |
132 // Call Interpreter::remove_activation_preserving_args_entry() to get the | |
133 // address of the same-named entrypoint in the generated interpreter code. | |
134 call_VM_leaf(CAST_FROM_FN_PTR(address, Interpreter::remove_activation_preserving_args_entry)); | |
135 jmp(rax); | |
136 bind(L); | |
137 } | |
138 } | |
139 | |
140 | |
141 void InterpreterMacroAssembler::load_earlyret_value(TosState state) { | |
304 | 142 movptr(rcx, Address(r15_thread, JavaThread::jvmti_thread_state_offset())); |
0 | 143 const Address tos_addr(rcx, JvmtiThreadState::earlyret_tos_offset()); |
144 const Address oop_addr(rcx, JvmtiThreadState::earlyret_oop_offset()); | |
145 const Address val_addr(rcx, JvmtiThreadState::earlyret_value_offset()); | |
146 switch (state) { | |
304 | 147 case atos: movptr(rax, oop_addr); |
148 movptr(oop_addr, (int32_t)NULL_WORD); | |
0 | 149 verify_oop(rax, state); break; |
304 | 150 case ltos: movptr(rax, val_addr); break; |
0 | 151 case btos: // fall through |
152 case ctos: // fall through | |
153 case stos: // fall through | |
154 case itos: movl(rax, val_addr); break; | |
155 case ftos: movflt(xmm0, val_addr); break; | |
156 case dtos: movdbl(xmm0, val_addr); break; | |
157 case vtos: /* nothing to do */ break; | |
158 default : ShouldNotReachHere(); | |
159 } | |
160 // Clean up tos value in the thread object | |
161 movl(tos_addr, (int) ilgl); | |
304 | 162 movl(val_addr, (int32_t) NULL_WORD); |
0 | 163 } |
164 | |
165 | |
166 void InterpreterMacroAssembler::check_and_handle_earlyret(Register java_thread) { | |
167 if (JvmtiExport::can_force_early_return()) { | |
168 Label L; | |
304 | 169 movptr(c_rarg0, Address(r15_thread, JavaThread::jvmti_thread_state_offset())); |
170 testptr(c_rarg0, c_rarg0); | |
0 | 171 jcc(Assembler::zero, L); // if (thread->jvmti_thread_state() == NULL) exit; |
172 | |
173 // Initiate earlyret handling only if it is not already being processed. | |
174 // If the flag has the earlyret_processing bit set, it means that this code | |
175 // is called *during* earlyret handling - we don't want to reenter. | |
176 movl(c_rarg0, Address(c_rarg0, JvmtiThreadState::earlyret_state_offset())); | |
177 cmpl(c_rarg0, JvmtiThreadState::earlyret_pending); | |
178 jcc(Assembler::notEqual, L); | |
179 | |
180 // Call Interpreter::remove_activation_early_entry() to get the address of the | |
181 // same-named entrypoint in the generated interpreter code. | |
304 | 182 movptr(c_rarg0, Address(r15_thread, JavaThread::jvmti_thread_state_offset())); |
0 | 183 movl(c_rarg0, Address(c_rarg0, JvmtiThreadState::earlyret_tos_offset())); |
184 call_VM_leaf(CAST_FROM_FN_PTR(address, Interpreter::remove_activation_early_entry), c_rarg0); | |
185 jmp(rax); | |
186 bind(L); | |
187 } | |
188 } | |
189 | |
190 | |
191 void InterpreterMacroAssembler::get_unsigned_2_byte_index_at_bcp( | |
192 Register reg, | |
193 int bcp_offset) { | |
194 assert(bcp_offset >= 0, "bcp is still pointing to start of bytecode"); | |
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195 load_unsigned_short(reg, Address(r13, bcp_offset)); |
0 | 196 bswapl(reg); |
197 shrl(reg, 16); | |
198 } | |
199 | |
200 | |
1108 | 201 void InterpreterMacroAssembler::get_cache_index_at_bcp(Register index, |
202 int bcp_offset, | |
1565 | 203 size_t index_size) { |
1108 | 204 assert(bcp_offset > 0, "bcp is still pointing to start of bytecode"); |
1565 | 205 if (index_size == sizeof(u2)) { |
1108 | 206 load_unsigned_short(index, Address(r13, bcp_offset)); |
1565 | 207 } else if (index_size == sizeof(u4)) { |
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208 assert(EnableInvokeDynamic, "giant index used only for JSR 292"); |
1108 | 209 movl(index, Address(r13, bcp_offset)); |
210 // Check if the secondary index definition is still ~x, otherwise | |
211 // we have to change the following assembler code to calculate the | |
212 // plain index. | |
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213 assert(ConstantPool::decode_invokedynamic_index(~123) == 123, "else change next line"); |
1108 | 214 notl(index); // convert to plain index |
1565 | 215 } else if (index_size == sizeof(u1)) { |
216 load_unsigned_byte(index, Address(r13, bcp_offset)); | |
217 } else { | |
218 ShouldNotReachHere(); | |
1108 | 219 } |
220 } | |
221 | |
222 | |
0 | 223 void InterpreterMacroAssembler::get_cache_and_index_at_bcp(Register cache, |
224 Register index, | |
1108 | 225 int bcp_offset, |
1565 | 226 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"); |
231 // convert from field index to ConstantPoolCacheEntry index | |
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232 assert(exact_log2(in_words(ConstantPoolCacheEntry::size())) == 2, "else change next line"); |
0 | 233 shll(index, 2); |
234 } | |
235 | |
236 | |
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237 void InterpreterMacroAssembler::get_cache_and_index_and_bytecode_at_bcp(Register cache, |
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238 Register index, |
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239 Register bytecode, |
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240 int byte_no, |
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241 int bcp_offset, |
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242 size_t index_size) { |
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243 get_cache_and_index_at_bcp(cache, index, bcp_offset, index_size); |
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244 // We use a 32-bit load here since the layout of 64-bit words on |
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245 // little-endian machines allow us that. |
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246 movl(bytecode, Address(cache, index, Address::times_ptr, ConstantPoolCache::base_offset() + ConstantPoolCacheEntry::indices_offset())); |
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247 const int shift_count = (1 + byte_no) * BitsPerByte; |
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248 assert((byte_no == TemplateTable::f1_byte && shift_count == ConstantPoolCacheEntry::bytecode_1_shift) || |
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249 (byte_no == TemplateTable::f2_byte && shift_count == ConstantPoolCacheEntry::bytecode_2_shift), |
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250 "correct shift count"); |
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251 shrl(bytecode, shift_count); |
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252 assert(ConstantPoolCacheEntry::bytecode_1_mask == ConstantPoolCacheEntry::bytecode_2_mask, "common mask"); |
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253 andl(bytecode, ConstantPoolCacheEntry::bytecode_1_mask); |
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254 } |
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255 |
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256 |
0 | 257 void InterpreterMacroAssembler::get_cache_entry_pointer_at_bcp(Register cache, |
258 Register tmp, | |
1108 | 259 int bcp_offset, |
1565 | 260 size_t index_size) { |
0 | 261 assert(cache != tmp, "must use different register"); |
1565 | 262 get_cache_index_at_bcp(tmp, bcp_offset, index_size); |
0 | 263 assert(sizeof(ConstantPoolCacheEntry) == 4 * wordSize, "adjust code below"); |
264 // convert from field index to ConstantPoolCacheEntry index | |
265 // and from word offset to byte offset | |
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266 assert(exact_log2(in_bytes(ConstantPoolCacheEntry::size_in_bytes())) == 2 + LogBytesPerWord, "else change next line"); |
0 | 267 shll(tmp, 2 + LogBytesPerWord); |
304 | 268 movptr(cache, Address(rbp, frame::interpreter_frame_cache_offset * wordSize)); |
0 | 269 // skip past the header |
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270 addptr(cache, in_bytes(ConstantPoolCache::base_offset())); |
304 | 271 addptr(cache, tmp); // construct pointer to cache entry |
0 | 272 } |
273 | |
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274 void InterpreterMacroAssembler::get_method_counters(Register method, |
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275 Register mcs, Label& skip) { |
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276 Label has_counters; |
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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::notZero, has_counters); |
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280 call_VM(noreg, CAST_FROM_FN_PTR(address, |
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281 InterpreterRuntime::build_method_counters), method); |
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282 movptr(mcs, Address(method,Method::method_counters_offset())); |
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283 testptr(mcs, mcs); |
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284 jcc(Assembler::zero, skip); // No MethodCounters allocated, OutOfMemory |
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285 bind(has_counters); |
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286 } |
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287 |
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288 // Load object from cpool->resolved_references(index) |
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289 void InterpreterMacroAssembler::load_resolved_reference_at_index( |
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290 Register result, Register index) { |
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291 assert_different_registers(result, index); |
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292 // convert from field index to resolved_references() index and from |
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293 // word index to byte offset. Since this is a java object, it can be compressed |
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294 Register tmp = index; // reuse |
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295 shll(tmp, LogBytesPerHeapOop); |
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296 |
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297 get_constant_pool(result); |
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298 // load pointer for resolved_references[] objArray |
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299 movptr(result, Address(result, ConstantPool::resolved_references_offset_in_bytes())); |
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300 // JNIHandles::resolve(obj); |
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301 movptr(result, Address(result, 0)); |
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302 // Add in the index |
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303 addptr(result, tmp); |
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304 load_heap_oop(result, Address(result, arrayOopDesc::base_offset_in_bytes(T_OBJECT))); |
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305 } |
0 | 306 |
307 // Generate a subtype check: branch to ok_is_subtype if sub_klass is a | |
308 // subtype of super_klass. | |
309 // | |
310 // Args: | |
311 // rax: superklass | |
312 // Rsub_klass: subklass | |
313 // | |
314 // Kills: | |
315 // rcx, rdi | |
316 void InterpreterMacroAssembler::gen_subtype_check(Register Rsub_klass, | |
317 Label& ok_is_subtype) { | |
318 assert(Rsub_klass != rax, "rax holds superklass"); | |
319 assert(Rsub_klass != r14, "r14 holds locals"); | |
320 assert(Rsub_klass != r13, "r13 holds bcp"); | |
321 assert(Rsub_klass != rcx, "rcx holds 2ndary super array length"); | |
322 assert(Rsub_klass != rdi, "rdi holds 2ndary super array scan ptr"); | |
323 | |
324 // Profile the not-null value's klass. | |
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325 profile_typecheck(rcx, Rsub_klass, rdi); // blows rcx, reloads rdi |
0 | 326 |
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327 // Do the check. |
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328 check_klass_subtype(Rsub_klass, rax, rcx, ok_is_subtype); // blows rcx |
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329 |
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330 // Profile the failure of the check. |
0 | 331 profile_typecheck_failed(rcx); // blows rcx |
332 } | |
333 | |
334 | |
304 | 335 |
0 | 336 // Java Expression Stack |
337 | |
338 void InterpreterMacroAssembler::pop_ptr(Register r) { | |
304 | 339 pop(r); |
0 | 340 } |
341 | |
342 void InterpreterMacroAssembler::pop_i(Register r) { | |
304 | 343 // XXX can't use pop currently, upper half non clean |
0 | 344 movl(r, Address(rsp, 0)); |
304 | 345 addptr(rsp, wordSize); |
0 | 346 } |
347 | |
348 void InterpreterMacroAssembler::pop_l(Register r) { | |
349 movq(r, Address(rsp, 0)); | |
1506 | 350 addptr(rsp, 2 * Interpreter::stackElementSize); |
0 | 351 } |
352 | |
353 void InterpreterMacroAssembler::pop_f(XMMRegister r) { | |
354 movflt(r, Address(rsp, 0)); | |
304 | 355 addptr(rsp, wordSize); |
0 | 356 } |
357 | |
358 void InterpreterMacroAssembler::pop_d(XMMRegister r) { | |
359 movdbl(r, Address(rsp, 0)); | |
1506 | 360 addptr(rsp, 2 * Interpreter::stackElementSize); |
0 | 361 } |
362 | |
363 void InterpreterMacroAssembler::push_ptr(Register r) { | |
304 | 364 push(r); |
0 | 365 } |
366 | |
367 void InterpreterMacroAssembler::push_i(Register r) { | |
304 | 368 push(r); |
0 | 369 } |
370 | |
371 void InterpreterMacroAssembler::push_l(Register r) { | |
1506 | 372 subptr(rsp, 2 * wordSize); |
0 | 373 movq(Address(rsp, 0), r); |
374 } | |
375 | |
376 void InterpreterMacroAssembler::push_f(XMMRegister r) { | |
304 | 377 subptr(rsp, wordSize); |
0 | 378 movflt(Address(rsp, 0), r); |
379 } | |
380 | |
381 void InterpreterMacroAssembler::push_d(XMMRegister r) { | |
1506 | 382 subptr(rsp, 2 * wordSize); |
0 | 383 movdbl(Address(rsp, 0), r); |
384 } | |
385 | |
386 void InterpreterMacroAssembler::pop(TosState state) { | |
387 switch (state) { | |
388 case atos: pop_ptr(); break; | |
389 case btos: | |
390 case ctos: | |
391 case stos: | |
392 case itos: pop_i(); break; | |
393 case ltos: pop_l(); break; | |
394 case ftos: pop_f(); break; | |
395 case dtos: pop_d(); break; | |
396 case vtos: /* nothing to do */ break; | |
397 default: ShouldNotReachHere(); | |
398 } | |
399 verify_oop(rax, state); | |
400 } | |
401 | |
402 void InterpreterMacroAssembler::push(TosState state) { | |
403 verify_oop(rax, state); | |
404 switch (state) { | |
405 case atos: push_ptr(); break; | |
406 case btos: | |
407 case ctos: | |
408 case stos: | |
409 case itos: push_i(); break; | |
410 case ltos: push_l(); break; | |
411 case ftos: push_f(); break; | |
412 case dtos: push_d(); break; | |
413 case vtos: /* nothing to do */ break; | |
414 default : ShouldNotReachHere(); | |
415 } | |
416 } | |
417 | |
418 | |
1506 | 419 // Helpers for swap and dup |
420 void InterpreterMacroAssembler::load_ptr(int n, Register val) { | |
304 | 421 movptr(val, Address(rsp, Interpreter::expr_offset_in_bytes(n))); |
0 | 422 } |
423 | |
1506 | 424 void InterpreterMacroAssembler::store_ptr(int n, Register val) { |
425 movptr(Address(rsp, Interpreter::expr_offset_in_bytes(n)), val); | |
0 | 426 } |
427 | |
428 | |
710 | 429 void InterpreterMacroAssembler::prepare_to_jump_from_interpreted() { |
0 | 430 // set sender sp |
304 | 431 lea(r13, Address(rsp, wordSize)); |
0 | 432 // record last_sp |
304 | 433 movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), r13); |
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 // interp_only is an int, on little endian it is sufficient to test the byte only | |
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448 // Is a cmpl faster? |
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449 cmpb(Address(r15_thread, JavaThread::interp_only_mode_offset()), 0); |
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450 jccb(Assembler::zero, run_compiled_code); |
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451 jmp(Address(method, Method::interpreter_entry_offset())); |
0 | 452 bind(run_compiled_code); |
453 } | |
454 | |
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455 jmp(Address(method, Method::from_interpreted_offset())); |
0 | 456 |
457 } | |
458 | |
459 | |
460 // The following two routines provide a hook so that an implementation | |
461 // can schedule the dispatch in two parts. amd64 does not do this. | |
462 void InterpreterMacroAssembler::dispatch_prolog(TosState state, int step) { | |
463 // Nothing amd64 specific to be done here | |
464 } | |
465 | |
466 void InterpreterMacroAssembler::dispatch_epilog(TosState state, int step) { | |
467 dispatch_next(state, step); | |
468 } | |
469 | |
470 void InterpreterMacroAssembler::dispatch_base(TosState state, | |
471 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); | |
478 int32_t min_frame_size = | |
0 | 479 (frame::link_offset - frame::interpreter_frame_initial_sp_offset) * |
480 wordSize; | |
304 | 481 cmpptr(rcx, (int32_t)min_frame_size); |
0 | 482 jcc(Assembler::greaterEqual, L); |
483 stop("broken stack frame"); | |
484 bind(L); | |
485 } | |
486 if (verifyoop) { | |
487 verify_oop(rax, state); | |
488 } | |
489 lea(rscratch1, ExternalAddress((address)table)); | |
490 jmp(Address(rscratch1, rbx, Address::times_8)); | |
491 } | |
492 | |
493 void InterpreterMacroAssembler::dispatch_only(TosState state) { | |
494 dispatch_base(state, Interpreter::dispatch_table(state)); | |
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 r13 to prevent AGI) | |
508 load_unsigned_byte(rbx, Address(r13, step)); | |
509 // advance r13 | |
304 | 510 increment(r13, step); |
0 | 511 dispatch_base(state, Interpreter::dispatch_table(state)); |
512 } | |
513 | |
514 void InterpreterMacroAssembler::dispatch_via(TosState state, address* table) { | |
515 // load current bytecode | |
516 load_unsigned_byte(rbx, Address(r13, 0)); | |
517 dispatch_base(state, table); | |
518 } | |
519 | |
520 // remove activation | |
521 // | |
522 // Unlock the receiver if this is a synchronized method. | |
523 // Unlock any Java monitors from syncronized blocks. | |
524 // Remove the activation from the stack. | |
525 // | |
526 // If there are locked Java monitors | |
527 // If throw_monitor_exception | |
528 // throws IllegalMonitorStateException | |
529 // Else if install_monitor_exception | |
530 // installs IllegalMonitorStateException | |
531 // Else | |
532 // no error processing | |
533 void InterpreterMacroAssembler::remove_activation( | |
534 TosState state, | |
535 Register ret_addr, | |
536 bool throw_monitor_exception, | |
537 bool install_monitor_exception, | |
538 bool notify_jvmdi) { | |
539 // Note: Registers rdx xmm0 may be in use for the | |
540 // result check if synchronized method | |
541 Label unlocked, unlock, no_unlock; | |
542 | |
543 // get the value of _do_not_unlock_if_synchronized into rdx | |
544 const Address do_not_unlock_if_synchronized(r15_thread, | |
545 in_bytes(JavaThread::do_not_unlock_if_synchronized_offset())); | |
546 movbool(rdx, do_not_unlock_if_synchronized); | |
547 movbool(do_not_unlock_if_synchronized, false); // reset the flag | |
548 | |
549 // get method access flags | |
304 | 550 movptr(rbx, Address(rbp, frame::interpreter_frame_method_offset * wordSize)); |
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551 movl(rcx, Address(rbx, Method::access_flags_offset())); |
0 | 552 testl(rcx, JVM_ACC_SYNCHRONIZED); |
553 jcc(Assembler::zero, unlocked); | |
554 | |
555 // Don't unlock anything if the _do_not_unlock_if_synchronized flag | |
556 // is set. | |
557 testbool(rdx); | |
558 jcc(Assembler::notZero, no_unlock); | |
559 | |
560 // unlock monitor | |
561 push(state); // save result | |
562 | |
563 // BasicObjectLock will be first in list, since this is a | |
564 // synchronized method. However, need to check that the object has | |
565 // not been unlocked by an explicit monitorexit bytecode. | |
566 const Address monitor(rbp, frame::interpreter_frame_initial_sp_offset * | |
567 wordSize - (int) sizeof(BasicObjectLock)); | |
568 // We use c_rarg1 so that if we go slow path it will be the correct | |
569 // register for unlock_object to pass to VM directly | |
304 | 570 lea(c_rarg1, monitor); // address of first monitor |
0 | 571 |
304 | 572 movptr(rax, Address(c_rarg1, BasicObjectLock::obj_offset_in_bytes())); |
573 testptr(rax, rax); | |
0 | 574 jcc(Assembler::notZero, unlock); |
575 | |
576 pop(state); | |
577 if (throw_monitor_exception) { | |
578 // Entry already unlocked, need to throw exception | |
579 call_VM(noreg, CAST_FROM_FN_PTR(address, | |
580 InterpreterRuntime::throw_illegal_monitor_state_exception)); | |
581 should_not_reach_here(); | |
582 } else { | |
583 // Monitor already unlocked during a stack unroll. If requested, | |
584 // install an illegal_monitor_state_exception. Continue with | |
585 // stack unrolling. | |
586 if (install_monitor_exception) { | |
587 call_VM(noreg, CAST_FROM_FN_PTR(address, | |
588 InterpreterRuntime::new_illegal_monitor_state_exception)); | |
589 } | |
590 jmp(unlocked); | |
591 } | |
592 | |
593 bind(unlock); | |
594 unlock_object(c_rarg1); | |
595 pop(state); | |
596 | |
597 // Check that for block-structured locking (i.e., that all locked | |
598 // objects has been unlocked) | |
599 bind(unlocked); | |
600 | |
601 // rax: Might contain return value | |
602 | |
603 // Check that all monitors are unlocked | |
604 { | |
605 Label loop, exception, entry, restart; | |
606 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize; | |
607 const Address monitor_block_top( | |
608 rbp, frame::interpreter_frame_monitor_block_top_offset * wordSize); | |
609 const Address monitor_block_bot( | |
610 rbp, frame::interpreter_frame_initial_sp_offset * wordSize); | |
611 | |
612 bind(restart); | |
613 // We use c_rarg1 so that if we go slow path it will be the correct | |
614 // register for unlock_object to pass to VM directly | |
304 | 615 movptr(c_rarg1, monitor_block_top); // points to current entry, starting |
0 | 616 // with top-most entry |
304 | 617 lea(rbx, monitor_block_bot); // points to word before bottom of |
0 | 618 // monitor block |
619 jmp(entry); | |
620 | |
621 // Entry already locked, need to throw exception | |
622 bind(exception); | |
623 | |
624 if (throw_monitor_exception) { | |
625 // Throw exception | |
626 MacroAssembler::call_VM(noreg, | |
627 CAST_FROM_FN_PTR(address, InterpreterRuntime:: | |
628 throw_illegal_monitor_state_exception)); | |
629 should_not_reach_here(); | |
630 } else { | |
631 // Stack unrolling. Unlock object and install illegal_monitor_exception. | |
632 // Unlock does not block, so don't have to worry about the frame. | |
633 // We don't have to preserve c_rarg1 since we are going to throw an exception. | |
634 | |
635 push(state); | |
636 unlock_object(c_rarg1); | |
637 pop(state); | |
638 | |
639 if (install_monitor_exception) { | |
640 call_VM(noreg, CAST_FROM_FN_PTR(address, | |
641 InterpreterRuntime:: | |
642 new_illegal_monitor_state_exception)); | |
643 } | |
644 | |
645 jmp(restart); | |
646 } | |
647 | |
648 bind(loop); | |
649 // check if current entry is used | |
304 | 650 cmpptr(Address(c_rarg1, BasicObjectLock::obj_offset_in_bytes()), (int32_t) NULL); |
0 | 651 jcc(Assembler::notEqual, exception); |
652 | |
304 | 653 addptr(c_rarg1, entry_size); // otherwise advance to next entry |
0 | 654 bind(entry); |
304 | 655 cmpptr(c_rarg1, rbx); // check if bottom reached |
0 | 656 jcc(Assembler::notEqual, loop); // if not at bottom then check this entry |
657 } | |
658 | |
659 bind(no_unlock); | |
660 | |
661 // jvmti support | |
662 if (notify_jvmdi) { | |
663 notify_method_exit(state, NotifyJVMTI); // preserve TOSCA | |
664 } else { | |
665 notify_method_exit(state, SkipNotifyJVMTI); // preserve TOSCA | |
666 } | |
667 | |
668 // remove activation | |
669 // get sender sp | |
304 | 670 movptr(rbx, |
671 Address(rbp, frame::interpreter_frame_sender_sp_offset * wordSize)); | |
0 | 672 leave(); // remove frame anchor |
304 | 673 pop(ret_addr); // get return address |
674 mov(rsp, rbx); // set sp to sender sp | |
0 | 675 } |
676 | |
304 | 677 #endif // C_INTERP |
678 | |
0 | 679 // Lock object |
680 // | |
681 // Args: | |
682 // c_rarg1: BasicObjectLock to be used for locking | |
683 // | |
684 // Kills: | |
685 // rax | |
686 // c_rarg0, c_rarg1, c_rarg2, c_rarg3, .. (param regs) | |
687 // rscratch1, rscratch2 (scratch regs) | |
688 void InterpreterMacroAssembler::lock_object(Register lock_reg) { | |
689 assert(lock_reg == c_rarg1, "The argument is only for looks. It must be c_rarg1"); | |
690 | |
691 if (UseHeavyMonitors) { | |
692 call_VM(noreg, | |
693 CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorenter), | |
694 lock_reg); | |
695 } else { | |
696 Label done; | |
697 | |
698 const Register swap_reg = rax; // Must use rax for cmpxchg instruction | |
699 const Register obj_reg = c_rarg3; // Will contain the oop | |
700 | |
701 const int obj_offset = BasicObjectLock::obj_offset_in_bytes(); | |
702 const int lock_offset = BasicObjectLock::lock_offset_in_bytes (); | |
703 const int mark_offset = lock_offset + | |
704 BasicLock::displaced_header_offset_in_bytes(); | |
705 | |
706 Label slow_case; | |
707 | |
708 // Load object pointer into obj_reg %c_rarg3 | |
304 | 709 movptr(obj_reg, Address(lock_reg, obj_offset)); |
0 | 710 |
711 if (UseBiasedLocking) { | |
712 biased_locking_enter(lock_reg, obj_reg, swap_reg, rscratch1, false, done, &slow_case); | |
713 } | |
714 | |
715 // Load immediate 1 into swap_reg %rax | |
716 movl(swap_reg, 1); | |
717 | |
718 // Load (object->mark() | 1) into swap_reg %rax | |
304 | 719 orptr(swap_reg, Address(obj_reg, 0)); |
0 | 720 |
721 // Save (object->mark() | 1) into BasicLock's displaced header | |
304 | 722 movptr(Address(lock_reg, mark_offset), swap_reg); |
0 | 723 |
724 assert(lock_offset == 0, | |
725 "displached header must be first word in BasicObjectLock"); | |
726 | |
727 if (os::is_MP()) lock(); | |
304 | 728 cmpxchgptr(lock_reg, Address(obj_reg, 0)); |
0 | 729 if (PrintBiasedLockingStatistics) { |
730 cond_inc32(Assembler::zero, | |
731 ExternalAddress((address) BiasedLocking::fast_path_entry_count_addr())); | |
732 } | |
733 jcc(Assembler::zero, done); | |
734 | |
735 // Test if the oopMark is an obvious stack pointer, i.e., | |
736 // 1) (mark & 7) == 0, and | |
737 // 2) rsp <= mark < mark + os::pagesize() | |
738 // | |
739 // These 3 tests can be done by evaluating the following | |
740 // expression: ((mark - rsp) & (7 - os::vm_page_size())), | |
741 // assuming both stack pointer and pagesize have their | |
742 // least significant 3 bits clear. | |
743 // NOTE: the oopMark is in swap_reg %rax as the result of cmpxchg | |
304 | 744 subptr(swap_reg, rsp); |
745 andptr(swap_reg, 7 - os::vm_page_size()); | |
0 | 746 |
747 // Save the test result, for recursive case, the result is zero | |
304 | 748 movptr(Address(lock_reg, mark_offset), swap_reg); |
0 | 749 |
750 if (PrintBiasedLockingStatistics) { | |
751 cond_inc32(Assembler::zero, | |
752 ExternalAddress((address) BiasedLocking::fast_path_entry_count_addr())); | |
753 } | |
754 jcc(Assembler::zero, done); | |
755 | |
756 bind(slow_case); | |
757 | |
758 // Call the runtime routine for slow case | |
759 call_VM(noreg, | |
760 CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorenter), | |
761 lock_reg); | |
762 | |
763 bind(done); | |
764 } | |
765 } | |
766 | |
767 | |
768 // Unlocks an object. Used in monitorexit bytecode and | |
769 // remove_activation. Throws an IllegalMonitorException if object is | |
770 // not locked by current thread. | |
771 // | |
772 // Args: | |
773 // c_rarg1: BasicObjectLock for lock | |
774 // | |
775 // Kills: | |
776 // rax | |
777 // c_rarg0, c_rarg1, c_rarg2, c_rarg3, ... (param regs) | |
778 // rscratch1, rscratch2 (scratch regs) | |
779 void InterpreterMacroAssembler::unlock_object(Register lock_reg) { | |
780 assert(lock_reg == c_rarg1, "The argument is only for looks. It must be rarg1"); | |
781 | |
782 if (UseHeavyMonitors) { | |
783 call_VM(noreg, | |
784 CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorexit), | |
785 lock_reg); | |
786 } else { | |
787 Label done; | |
788 | |
789 const Register swap_reg = rax; // Must use rax for cmpxchg instruction | |
790 const Register header_reg = c_rarg2; // Will contain the old oopMark | |
791 const Register obj_reg = c_rarg3; // Will contain the oop | |
792 | |
793 save_bcp(); // Save in case of exception | |
794 | |
795 // Convert from BasicObjectLock structure to object and BasicLock | |
796 // structure Store the BasicLock address into %rax | |
304 | 797 lea(swap_reg, Address(lock_reg, BasicObjectLock::lock_offset_in_bytes())); |
0 | 798 |
799 // Load oop into obj_reg(%c_rarg3) | |
304 | 800 movptr(obj_reg, Address(lock_reg, BasicObjectLock::obj_offset_in_bytes())); |
0 | 801 |
802 // Free entry | |
304 | 803 movptr(Address(lock_reg, BasicObjectLock::obj_offset_in_bytes()), (int32_t)NULL_WORD); |
0 | 804 |
805 if (UseBiasedLocking) { | |
806 biased_locking_exit(obj_reg, header_reg, done); | |
807 } | |
808 | |
809 // Load the old header from BasicLock structure | |
304 | 810 movptr(header_reg, Address(swap_reg, |
811 BasicLock::displaced_header_offset_in_bytes())); | |
0 | 812 |
813 // Test for recursion | |
304 | 814 testptr(header_reg, header_reg); |
0 | 815 |
816 // zero for recursive case | |
817 jcc(Assembler::zero, done); | |
818 | |
819 // Atomic swap back the old header | |
820 if (os::is_MP()) lock(); | |
304 | 821 cmpxchgptr(header_reg, Address(obj_reg, 0)); |
0 | 822 |
823 // zero for recursive case | |
824 jcc(Assembler::zero, done); | |
825 | |
826 // Call the runtime routine for slow case. | |
304 | 827 movptr(Address(lock_reg, BasicObjectLock::obj_offset_in_bytes()), |
0 | 828 obj_reg); // restore obj |
829 call_VM(noreg, | |
830 CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorexit), | |
831 lock_reg); | |
832 | |
833 bind(done); | |
834 | |
835 restore_bcp(); | |
836 } | |
837 } | |
838 | |
304 | 839 #ifndef CC_INTERP |
0 | 840 |
841 void InterpreterMacroAssembler::test_method_data_pointer(Register mdp, | |
842 Label& zero_continue) { | |
843 assert(ProfileInterpreter, "must be profiling interpreter"); | |
304 | 844 movptr(mdp, Address(rbp, frame::interpreter_frame_mdx_offset * wordSize)); |
845 testptr(mdp, mdp); | |
0 | 846 jcc(Assembler::zero, zero_continue); |
847 } | |
848 | |
849 | |
850 // Set the method data pointer for the current bcp. | |
851 void InterpreterMacroAssembler::set_method_data_pointer_for_bcp() { | |
852 assert(ProfileInterpreter, "must be profiling interpreter"); | |
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853 Label set_mdp; |
304 | 854 push(rax); |
855 push(rbx); | |
0 | 856 |
857 get_method(rbx); | |
858 // Test MDO to avoid the call if it is NULL. | |
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859 movptr(rax, Address(rbx, in_bytes(Method::method_data_offset()))); |
304 | 860 testptr(rax, rax); |
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861 jcc(Assembler::zero, set_mdp); |
0 | 862 // rbx: method |
863 // r13: bcp | |
864 call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::bcp_to_di), rbx, r13); | |
865 // rax: mdi | |
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866 // mdo is guaranteed to be non-zero here, we checked for it before the call. |
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867 movptr(rbx, Address(rbx, in_bytes(Method::method_data_offset()))); |
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868 addptr(rbx, in_bytes(MethodData::data_offset())); |
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869 addptr(rax, rbx); |
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870 bind(set_mdp); |
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871 movptr(Address(rbp, frame::interpreter_frame_mdx_offset * wordSize), rax); |
304 | 872 pop(rbx); |
873 pop(rax); | |
0 | 874 } |
875 | |
876 void InterpreterMacroAssembler::verify_method_data_pointer() { | |
877 assert(ProfileInterpreter, "must be profiling interpreter"); | |
878 #ifdef ASSERT | |
879 Label verify_continue; | |
304 | 880 push(rax); |
881 push(rbx); | |
882 push(c_rarg3); | |
883 push(c_rarg2); | |
0 | 884 test_method_data_pointer(c_rarg3, verify_continue); // If mdp is zero, continue |
885 get_method(rbx); | |
886 | |
887 // If the mdp is valid, it will point to a DataLayout header which is | |
888 // consistent with the bcp. The converse is highly probable also. | |
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889 load_unsigned_short(c_rarg2, |
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890 Address(c_rarg3, in_bytes(DataLayout::bci_offset()))); |
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891 addptr(c_rarg2, Address(rbx, Method::const_offset())); |
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892 lea(c_rarg2, Address(c_rarg2, ConstMethod::codes_offset())); |
304 | 893 cmpptr(c_rarg2, r13); |
0 | 894 jcc(Assembler::equal, verify_continue); |
895 // rbx: method | |
896 // r13: bcp | |
897 // c_rarg3: mdp | |
898 call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::verify_mdp), | |
899 rbx, r13, c_rarg3); | |
900 bind(verify_continue); | |
304 | 901 pop(c_rarg2); |
902 pop(c_rarg3); | |
903 pop(rbx); | |
904 pop(rax); | |
0 | 905 #endif // ASSERT |
906 } | |
907 | |
908 | |
909 void InterpreterMacroAssembler::set_mdp_data_at(Register mdp_in, | |
910 int constant, | |
911 Register value) { | |
912 assert(ProfileInterpreter, "must be profiling interpreter"); | |
913 Address data(mdp_in, constant); | |
304 | 914 movptr(data, value); |
0 | 915 } |
916 | |
917 | |
918 void InterpreterMacroAssembler::increment_mdp_data_at(Register mdp_in, | |
919 int constant, | |
920 bool decrement) { | |
921 // Counter address | |
922 Address data(mdp_in, constant); | |
923 | |
924 increment_mdp_data_at(data, decrement); | |
925 } | |
926 | |
927 void InterpreterMacroAssembler::increment_mdp_data_at(Address data, | |
928 bool decrement) { | |
929 assert(ProfileInterpreter, "must be profiling interpreter"); | |
304 | 930 // %%% this does 64bit counters at best it is wasting space |
931 // at worst it is a rare bug when counters overflow | |
0 | 932 |
933 if (decrement) { | |
934 // Decrement the register. Set condition codes. | |
304 | 935 addptr(data, (int32_t) -DataLayout::counter_increment); |
0 | 936 // If the decrement causes the counter to overflow, stay negative |
937 Label L; | |
938 jcc(Assembler::negative, L); | |
304 | 939 addptr(data, (int32_t) DataLayout::counter_increment); |
0 | 940 bind(L); |
941 } else { | |
942 assert(DataLayout::counter_increment == 1, | |
943 "flow-free idiom only works with 1"); | |
944 // Increment the register. Set carry flag. | |
304 | 945 addptr(data, DataLayout::counter_increment); |
0 | 946 // If the increment causes the counter to overflow, pull back by 1. |
304 | 947 sbbptr(data, (int32_t)0); |
0 | 948 } |
949 } | |
950 | |
951 | |
952 void InterpreterMacroAssembler::increment_mdp_data_at(Register mdp_in, | |
953 Register reg, | |
954 int constant, | |
955 bool decrement) { | |
956 Address data(mdp_in, reg, Address::times_1, constant); | |
957 | |
958 increment_mdp_data_at(data, decrement); | |
959 } | |
960 | |
961 void InterpreterMacroAssembler::set_mdp_flag_at(Register mdp_in, | |
962 int flag_byte_constant) { | |
963 assert(ProfileInterpreter, "must be profiling interpreter"); | |
964 int header_offset = in_bytes(DataLayout::header_offset()); | |
965 int header_bits = DataLayout::flag_mask_to_header_mask(flag_byte_constant); | |
966 // Set the flag | |
967 orl(Address(mdp_in, header_offset), header_bits); | |
968 } | |
969 | |
970 | |
971 | |
972 void InterpreterMacroAssembler::test_mdp_data_at(Register mdp_in, | |
973 int offset, | |
974 Register value, | |
975 Register test_value_out, | |
976 Label& not_equal_continue) { | |
977 assert(ProfileInterpreter, "must be profiling interpreter"); | |
978 if (test_value_out == noreg) { | |
304 | 979 cmpptr(value, Address(mdp_in, offset)); |
0 | 980 } else { |
981 // Put the test value into a register, so caller can use it: | |
304 | 982 movptr(test_value_out, Address(mdp_in, offset)); |
983 cmpptr(test_value_out, value); | |
0 | 984 } |
985 jcc(Assembler::notEqual, not_equal_continue); | |
986 } | |
987 | |
988 | |
989 void InterpreterMacroAssembler::update_mdp_by_offset(Register mdp_in, | |
990 int offset_of_disp) { | |
991 assert(ProfileInterpreter, "must be profiling interpreter"); | |
992 Address disp_address(mdp_in, offset_of_disp); | |
304 | 993 addptr(mdp_in, disp_address); |
994 movptr(Address(rbp, frame::interpreter_frame_mdx_offset * wordSize), mdp_in); | |
0 | 995 } |
996 | |
997 | |
998 void InterpreterMacroAssembler::update_mdp_by_offset(Register mdp_in, | |
999 Register reg, | |
1000 int offset_of_disp) { | |
1001 assert(ProfileInterpreter, "must be profiling interpreter"); | |
1002 Address disp_address(mdp_in, reg, Address::times_1, offset_of_disp); | |
304 | 1003 addptr(mdp_in, disp_address); |
1004 movptr(Address(rbp, frame::interpreter_frame_mdx_offset * wordSize), mdp_in); | |
0 | 1005 } |
1006 | |
1007 | |
1008 void InterpreterMacroAssembler::update_mdp_by_constant(Register mdp_in, | |
1009 int constant) { | |
1010 assert(ProfileInterpreter, "must be profiling interpreter"); | |
304 | 1011 addptr(mdp_in, constant); |
1012 movptr(Address(rbp, frame::interpreter_frame_mdx_offset * wordSize), mdp_in); | |
0 | 1013 } |
1014 | |
1015 | |
1016 void InterpreterMacroAssembler::update_mdp_for_ret(Register return_bci) { | |
1017 assert(ProfileInterpreter, "must be profiling interpreter"); | |
304 | 1018 push(return_bci); // save/restore across call_VM |
0 | 1019 call_VM(noreg, |
1020 CAST_FROM_FN_PTR(address, InterpreterRuntime::update_mdp_for_ret), | |
1021 return_bci); | |
304 | 1022 pop(return_bci); |
0 | 1023 } |
1024 | |
1025 | |
1026 void InterpreterMacroAssembler::profile_taken_branch(Register mdp, | |
1027 Register bumped_count) { | |
1028 if (ProfileInterpreter) { | |
1029 Label profile_continue; | |
1030 | |
1031 // If no method data exists, go to profile_continue. | |
1032 // Otherwise, assign to mdp | |
1033 test_method_data_pointer(mdp, profile_continue); | |
1034 | |
1035 // We are taking a branch. Increment the taken count. | |
1036 // We inline increment_mdp_data_at to return bumped_count in a register | |
1037 //increment_mdp_data_at(mdp, in_bytes(JumpData::taken_offset())); | |
1038 Address data(mdp, in_bytes(JumpData::taken_offset())); | |
304 | 1039 movptr(bumped_count, data); |
0 | 1040 assert(DataLayout::counter_increment == 1, |
1041 "flow-free idiom only works with 1"); | |
304 | 1042 addptr(bumped_count, DataLayout::counter_increment); |
1043 sbbptr(bumped_count, 0); | |
1044 movptr(data, bumped_count); // Store back out | |
0 | 1045 |
1046 // The method data pointer needs to be updated to reflect the new target. | |
1047 update_mdp_by_offset(mdp, in_bytes(JumpData::displacement_offset())); | |
1048 bind(profile_continue); | |
1049 } | |
1050 } | |
1051 | |
1052 | |
1053 void InterpreterMacroAssembler::profile_not_taken_branch(Register mdp) { | |
1054 if (ProfileInterpreter) { | |
1055 Label profile_continue; | |
1056 | |
1057 // If no method data exists, go to profile_continue. | |
1058 test_method_data_pointer(mdp, profile_continue); | |
1059 | |
1060 // We are taking a branch. Increment the not taken count. | |
1061 increment_mdp_data_at(mdp, in_bytes(BranchData::not_taken_offset())); | |
1062 | |
1063 // The method data pointer needs to be updated to correspond to | |
1064 // the next bytecode | |
1065 update_mdp_by_constant(mdp, in_bytes(BranchData::branch_data_size())); | |
1066 bind(profile_continue); | |
1067 } | |
1068 } | |
1069 | |
1070 void InterpreterMacroAssembler::profile_call(Register mdp) { | |
1071 if (ProfileInterpreter) { | |
1072 Label profile_continue; | |
1073 | |
1074 // If no method data exists, go to profile_continue. | |
1075 test_method_data_pointer(mdp, profile_continue); | |
1076 | |
1077 // We are making a call. Increment the count. | |
1078 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset())); | |
1079 | |
1080 // The method data pointer needs to be updated to reflect the new target. | |
1081 update_mdp_by_constant(mdp, in_bytes(CounterData::counter_data_size())); | |
1082 bind(profile_continue); | |
1083 } | |
1084 } | |
1085 | |
1086 | |
1087 void InterpreterMacroAssembler::profile_final_call(Register mdp) { | |
1088 if (ProfileInterpreter) { | |
1089 Label profile_continue; | |
1090 | |
1091 // If no method data exists, go to profile_continue. | |
1092 test_method_data_pointer(mdp, profile_continue); | |
1093 | |
1094 // We are making a call. Increment the count. | |
1095 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset())); | |
1096 | |
1097 // The method data pointer needs to be updated to reflect the new target. | |
1098 update_mdp_by_constant(mdp, | |
1099 in_bytes(VirtualCallData:: | |
1100 virtual_call_data_size())); | |
1101 bind(profile_continue); | |
1102 } | |
1103 } | |
1104 | |
1105 | |
1106 void InterpreterMacroAssembler::profile_virtual_call(Register receiver, | |
1107 Register mdp, | |
1108 | 1108 Register reg2, |
1109 bool receiver_can_be_null) { | |
0 | 1110 if (ProfileInterpreter) { |
1111 Label profile_continue; | |
1112 | |
1113 // If no method data exists, go to profile_continue. | |
1114 test_method_data_pointer(mdp, profile_continue); | |
1115 | |
1108 | 1116 Label skip_receiver_profile; |
1117 if (receiver_can_be_null) { | |
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1118 Label not_null; |
1108 | 1119 testptr(receiver, receiver); |
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1120 jccb(Assembler::notZero, not_null); |
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1121 // We are making a call. Increment the count for null receiver. |
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1122 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset())); |
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1123 jmp(skip_receiver_profile); |
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1124 bind(not_null); |
1108 | 1125 } |
1126 | |
0 | 1127 // Record the receiver type. |
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1128 record_klass_in_profile(receiver, mdp, reg2, true); |
1108 | 1129 bind(skip_receiver_profile); |
0 | 1130 |
1131 // The method data pointer needs to be updated to reflect the new target. | |
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1132 #ifdef GRAAL |
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1133 if (MethodProfileWidth == 0) { |
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1134 update_mdp_by_constant(mdp, in_bytes(VirtualCallData::virtual_call_data_size())); |
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1135 } |
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1136 #else |
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1137 update_mdp_by_constant(mdp, in_bytes(VirtualCallData::virtual_call_data_size())); |
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1138 #endif |
0 | 1139 bind(profile_continue); |
1140 } | |
1141 } | |
1142 | |
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1143 #ifdef GRAAL |
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1144 void InterpreterMacroAssembler::profile_called_method(Register method, Register mdp, Register reg2) { |
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1145 assert_different_registers(method, mdp, reg2); |
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1146 if (ProfileInterpreter && MethodProfileWidth > 0) { |
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1147 Label profile_continue; |
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1148 |
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1149 // If no method data exists, go to profile_continue. |
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1150 test_method_data_pointer(mdp, profile_continue); |
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1151 |
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1152 Label done; |
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1153 record_item_in_profile_helper(method, mdp, reg2, 0, done, MethodProfileWidth, |
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1154 &VirtualCallData::method_offset, &VirtualCallData::method_count_offset, in_bytes(VirtualCallData::nonprofiled_receiver_count_offset())); |
10458 | 1155 bind(done); |
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1156 |
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1157 update_mdp_by_constant(mdp, in_bytes(VirtualCallData::virtual_call_data_size())); |
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1158 bind(profile_continue); |
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1159 } |
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1160 } |
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1161 #endif |
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1162 |
0 | 1163 // This routine creates a state machine for updating the multi-row |
1164 // type profile at a virtual call site (or other type-sensitive bytecode). | |
1165 // The machine visits each row (of receiver/count) until the receiver type | |
1166 // is found, or until it runs out of rows. At the same time, it remembers | |
1167 // the location of the first empty row. (An empty row records null for its | |
1168 // receiver, and can be allocated for a newly-observed receiver type.) | |
1169 // Because there are two degrees of freedom in the state, a simple linear | |
1170 // search will not work; it must be a decision tree. Hence this helper | |
1171 // function is recursive, to generate the required tree structured code. | |
1172 // It's the interpreter, so we are trading off code space for speed. | |
1173 // See below for example code. | |
1174 void InterpreterMacroAssembler::record_klass_in_profile_helper( | |
1175 Register receiver, Register mdp, | |
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1176 Register reg2, Label& done, bool is_virtual_call) { |
1206
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1177 if (TypeProfileWidth == 0) { |
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1178 if (is_virtual_call) { |
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1179 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset())); |
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1180 } |
7154
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1181 #ifdef GRAAL |
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1182 else { |
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1183 increment_mdp_data_at(mdp, in_bytes(ReceiverTypeData::nonprofiled_receiver_count_offset())); |
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1184 } |
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1185 #endif |
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1186 } else { |
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1187 bool use_non_profiled_counter = !is_virtual_call || IS_GRAAL_DEFINED; |
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1188 int non_profiled_offset = -1; |
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1189 if (use_non_profiled_counter) { |
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1190 non_profiled_offset = in_bytes(CounterData::count_offset()); |
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1191 #ifdef GRAAL |
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1192 if (!is_virtual_call) { |
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1193 non_profiled_offset = in_bytes(ReceiverTypeData::nonprofiled_receiver_count_offset()); |
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1194 } |
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1195 #endif |
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1196 assert(non_profiled_offset >= 0, "must be"); |
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1197 } |
967
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1198 |
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1199 record_item_in_profile_helper(receiver, mdp, reg2, 0, done, TypeProfileWidth, |
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1200 &VirtualCallData::receiver_offset, &VirtualCallData::receiver_count_offset, non_profiled_offset); |
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1201 } |
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1202 } |
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1203 |
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1204 void InterpreterMacroAssembler::record_item_in_profile_helper(Register item, Register mdp, |
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1205 Register reg2, int start_row, Label& done, int total_rows, |
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1206 OffsetFunction item_offset_fn, OffsetFunction item_count_offset_fn, |
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1207 int non_profiled_offset) { |
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1208 int last_row = total_rows - 1; |
0 | 1209 assert(start_row <= last_row, "must be work left to do"); |
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1210 // Test this row for both the item and for null. |
0 | 1211 // Take any of three different outcomes: |
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1212 // 1. found item => increment count and goto done |
0 | 1213 // 2. found null => keep looking for case 1, maybe allocate this cell |
1214 // 3. found something else => keep looking for cases 1 and 2 | |
1215 // Case 3 is handled by a recursive call. | |
1216 for (int row = start_row; row <= last_row; row++) { | |
1217 Label next_test; | |
1218 bool test_for_null_also = (row == start_row); | |
1219 | |
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1220 // See if the item is item[n]. |
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1221 int item_offset = in_bytes(item_offset_fn(row)); |
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1222 test_mdp_data_at(mdp, item_offset, item, |
0 | 1223 (test_for_null_also ? reg2 : noreg), |
1224 next_test); | |
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1225 // (Reg2 now contains the item from the CallData.) |
0 | 1226 |
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1227 // The item is item[n]. Increment count[n]. |
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1228 int count_offset = in_bytes(item_count_offset_fn(row)); |
0 | 1229 increment_mdp_data_at(mdp, count_offset); |
1230 jmp(done); | |
1231 bind(next_test); | |
1232 | |
1233 if (test_for_null_also) { | |
1206
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1234 Label found_null; |
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1235 // Failed the equality check on item[n]... Test for null. |
304 | 1236 testptr(reg2, reg2); |
0 | 1237 if (start_row == last_row) { |
1238 // The only thing left to do is handle the null case. | |
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1239 if (non_profiled_offset >= 0) { |
1206
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1240 jccb(Assembler::zero, found_null); |
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1241 // Item did not match any saved item and there is no empty row for it. |
1251
576e77447e3c
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diff
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1242 // Increment total counter to indicate polymorphic case. |
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1243 increment_mdp_data_at(mdp, non_profiled_offset); |
1206
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1244 jmp(done); |
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1245 bind(found_null); |
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1246 } else { |
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|
1247 jcc(Assembler::notZero, done); |
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1248 } |
0 | 1249 break; |
1250 } | |
1251 // Since null is rare, make it be the branch-taken case. | |
1252 jcc(Assembler::zero, found_null); | |
1253 | |
1254 // Put all the "Case 3" tests here. | |
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1255 record_item_in_profile_helper(item, mdp, reg2, start_row + 1, done, total_rows, |
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1256 item_offset_fn, item_count_offset_fn, non_profiled_offset); |
0 | 1257 |
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1258 // Found a null. Keep searching for a matching item, |
0 | 1259 // but remember that this is an empty (unused) slot. |
1260 bind(found_null); | |
1261 } | |
1262 } | |
1263 | |
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1264 // In the fall-through case, we found no matching item, but we |
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1265 // observed the item[start_row] is NULL. |
0 | 1266 |
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1267 // Fill in the item field and increment the count. |
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1268 int item_offset = in_bytes(item_offset_fn(start_row)); |
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1269 set_mdp_data_at(mdp, item_offset, item); |
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1270 int count_offset = in_bytes(item_count_offset_fn(start_row)); |
0 | 1271 movl(reg2, DataLayout::counter_increment); |
1272 set_mdp_data_at(mdp, count_offset, reg2); | |
1206
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1273 if (start_row > 0) { |
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1274 jmp(done); |
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1275 } |
0 | 1276 } |
1277 | |
1278 // Example state machine code for three profile rows: | |
1279 // // main copy of decision tree, rooted at row[1] | |
1280 // if (row[0].rec == rec) { row[0].incr(); goto done; } | |
1281 // if (row[0].rec != NULL) { | |
1282 // // inner copy of decision tree, rooted at row[1] | |
1283 // if (row[1].rec == rec) { row[1].incr(); goto done; } | |
1284 // if (row[1].rec != NULL) { | |
1285 // // degenerate decision tree, rooted at row[2] | |
1286 // if (row[2].rec == rec) { row[2].incr(); goto done; } | |
1206
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1287 // if (row[2].rec != NULL) { count.incr(); goto done; } // overflow |
0 | 1288 // row[2].init(rec); goto done; |
1289 // } else { | |
1290 // // remember row[1] is empty | |
1291 // if (row[2].rec == rec) { row[2].incr(); goto done; } | |
1292 // row[1].init(rec); goto done; | |
1293 // } | |
1294 // } else { | |
1295 // // remember row[0] is empty | |
1296 // if (row[1].rec == rec) { row[1].incr(); goto done; } | |
1297 // if (row[2].rec == rec) { row[2].incr(); goto done; } | |
1298 // row[0].init(rec); goto done; | |
1299 // } | |
1206
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1300 // done: |
0 | 1301 |
1302 void InterpreterMacroAssembler::record_klass_in_profile(Register receiver, | |
1206
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1303 Register mdp, Register reg2, |
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1304 bool is_virtual_call) { |
0 | 1305 assert(ProfileInterpreter, "must be profiling"); |
1306 Label done; | |
1307 | |
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1308 record_klass_in_profile_helper(receiver, mdp, reg2, done, is_virtual_call); |
0 | 1309 |
1310 bind (done); | |
1311 } | |
1312 | |
1313 void InterpreterMacroAssembler::profile_ret(Register return_bci, | |
1314 Register mdp) { | |
1315 if (ProfileInterpreter) { | |
1316 Label profile_continue; | |
1317 uint row; | |
1318 | |
1319 // If no method data exists, go to profile_continue. | |
1320 test_method_data_pointer(mdp, profile_continue); | |
1321 | |
1322 // Update the total ret count. | |
1323 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset())); | |
1324 | |
1325 for (row = 0; row < RetData::row_limit(); row++) { | |
1326 Label next_test; | |
1327 | |
1328 // See if return_bci is equal to bci[n]: | |
1329 test_mdp_data_at(mdp, | |
1330 in_bytes(RetData::bci_offset(row)), | |
1331 return_bci, noreg, | |
1332 next_test); | |
1333 | |
1334 // return_bci is equal to bci[n]. Increment the count. | |
1335 increment_mdp_data_at(mdp, in_bytes(RetData::bci_count_offset(row))); | |
1336 | |
1337 // The method data pointer needs to be updated to reflect the new target. | |
1338 update_mdp_by_offset(mdp, | |
1339 in_bytes(RetData::bci_displacement_offset(row))); | |
1340 jmp(profile_continue); | |
1341 bind(next_test); | |
1342 } | |
1343 | |
1344 update_mdp_for_ret(return_bci); | |
1345 | |
1346 bind(profile_continue); | |
1347 } | |
1348 } | |
1349 | |
1350 | |
1351 void InterpreterMacroAssembler::profile_null_seen(Register mdp) { | |
1352 if (ProfileInterpreter) { | |
1353 Label profile_continue; | |
1354 | |
1355 // If no method data exists, go to profile_continue. | |
1356 test_method_data_pointer(mdp, profile_continue); | |
1357 | |
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1358 set_mdp_flag_at(mdp, BitData::null_seen_byte_constant()); |
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1359 |
0 | 1360 // The method data pointer needs to be updated. |
1361 int mdp_delta = in_bytes(BitData::bit_data_size()); | |
1362 if (TypeProfileCasts) { | |
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1363 mdp_delta = in_bytes(ReceiverTypeData::receiver_type_data_size()); |
0 | 1364 } |
1365 update_mdp_by_constant(mdp, mdp_delta); | |
1366 | |
1367 bind(profile_continue); | |
1368 } | |
1369 } | |
1370 | |
1371 | |
1372 void InterpreterMacroAssembler::profile_typecheck_failed(Register mdp) { | |
1373 if (ProfileInterpreter && TypeProfileCasts) { | |
1374 Label profile_continue; | |
1375 | |
1376 // If no method data exists, go to profile_continue. | |
1377 test_method_data_pointer(mdp, profile_continue); | |
1378 | |
1379 int count_offset = in_bytes(CounterData::count_offset()); | |
1380 // Back up the address, since we have already bumped the mdp. | |
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1381 count_offset -= in_bytes(ReceiverTypeData::receiver_type_data_size()); |
0 | 1382 |
1383 // *Decrement* the counter. We expect to see zero or small negatives. | |
1384 increment_mdp_data_at(mdp, count_offset, true); | |
1385 | |
1386 bind (profile_continue); | |
1387 } | |
1388 } | |
1389 | |
1390 | |
1391 void InterpreterMacroAssembler::profile_typecheck(Register mdp, Register klass, Register reg2) { | |
1392 if (ProfileInterpreter) { | |
1393 Label profile_continue; | |
1394 | |
1395 // If no method data exists, go to profile_continue. | |
1396 test_method_data_pointer(mdp, profile_continue); | |
1397 | |
1398 // The method data pointer needs to be updated. | |
1399 int mdp_delta = in_bytes(BitData::bit_data_size()); | |
1400 if (TypeProfileCasts) { | |
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1401 mdp_delta = in_bytes(ReceiverTypeData::receiver_type_data_size()); |
0 | 1402 |
1403 // Record the object type. | |
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1404 record_klass_in_profile(klass, mdp, reg2, false); |
0 | 1405 } |
1406 update_mdp_by_constant(mdp, mdp_delta); | |
1407 | |
1408 bind(profile_continue); | |
1409 } | |
1410 } | |
1411 | |
1412 | |
1413 void InterpreterMacroAssembler::profile_switch_default(Register mdp) { | |
1414 if (ProfileInterpreter) { | |
1415 Label profile_continue; | |
1416 | |
1417 // If no method data exists, go to profile_continue. | |
1418 test_method_data_pointer(mdp, profile_continue); | |
1419 | |
1420 // Update the default case count | |
1421 increment_mdp_data_at(mdp, | |
1422 in_bytes(MultiBranchData::default_count_offset())); | |
1423 | |
1424 // The method data pointer needs to be updated. | |
1425 update_mdp_by_offset(mdp, | |
1426 in_bytes(MultiBranchData:: | |
1427 default_displacement_offset())); | |
1428 | |
1429 bind(profile_continue); | |
1430 } | |
1431 } | |
1432 | |
1433 | |
1434 void InterpreterMacroAssembler::profile_switch_case(Register index, | |
1435 Register mdp, | |
1436 Register reg2) { | |
1437 if (ProfileInterpreter) { | |
1438 Label profile_continue; | |
1439 | |
1440 // If no method data exists, go to profile_continue. | |
1441 test_method_data_pointer(mdp, profile_continue); | |
1442 | |
1443 // Build the base (index * per_case_size_in_bytes()) + | |
1444 // case_array_offset_in_bytes() | |
1445 movl(reg2, in_bytes(MultiBranchData::per_case_size())); | |
304 | 1446 imulptr(index, reg2); // XXX l ? |
1447 addptr(index, in_bytes(MultiBranchData::case_array_offset())); // XXX l ? | |
0 | 1448 |
1449 // Update the case count | |
1450 increment_mdp_data_at(mdp, | |
1451 index, | |
1452 in_bytes(MultiBranchData::relative_count_offset())); | |
1453 | |
1454 // The method data pointer needs to be updated. | |
1455 update_mdp_by_offset(mdp, | |
1456 index, | |
1457 in_bytes(MultiBranchData:: | |
1458 relative_displacement_offset())); | |
1459 | |
1460 bind(profile_continue); | |
1461 } | |
1462 } | |
1463 | |
1464 | |
304 | 1465 |
0 | 1466 void InterpreterMacroAssembler::verify_oop(Register reg, TosState state) { |
1467 if (state == atos) { | |
1468 MacroAssembler::verify_oop(reg); | |
1469 } | |
1470 } | |
1471 | |
1472 void InterpreterMacroAssembler::verify_FPU(int stack_depth, TosState state) { | |
1473 } | |
304 | 1474 #endif // !CC_INTERP |
0 | 1475 |
1476 | |
1477 void InterpreterMacroAssembler::notify_method_entry() { | |
1478 // Whenever JVMTI is interp_only_mode, method entry/exit events are sent to | |
1479 // track stack depth. If it is possible to enter interp_only_mode we add | |
1480 // the code to check if the event should be sent. | |
1481 if (JvmtiExport::can_post_interpreter_events()) { | |
1482 Label L; | |
1483 movl(rdx, Address(r15_thread, JavaThread::interp_only_mode_offset())); | |
1484 testl(rdx, rdx); | |
1485 jcc(Assembler::zero, L); | |
1486 call_VM(noreg, CAST_FROM_FN_PTR(address, | |
1487 InterpreterRuntime::post_method_entry)); | |
1488 bind(L); | |
1489 } | |
1490 | |
1491 { | |
1492 SkipIfEqual skip(this, &DTraceMethodProbes, false); | |
1493 get_method(c_rarg1); | |
1494 call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_entry), | |
1495 r15_thread, c_rarg1); | |
1496 } | |
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1497 |
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1498 // RedefineClasses() tracing support for obsolete method entry |
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1499 if (RC_TRACE_IN_RANGE(0x00001000, 0x00002000)) { |
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1500 get_method(c_rarg1); |
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1501 call_VM_leaf( |
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1502 CAST_FROM_FN_PTR(address, SharedRuntime::rc_trace_method_entry), |
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1503 r15_thread, c_rarg1); |
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1504 } |
0 | 1505 } |
1506 | |
1507 | |
1508 void InterpreterMacroAssembler::notify_method_exit( | |
1509 TosState state, NotifyMethodExitMode mode) { | |
1510 // Whenever JVMTI is interp_only_mode, method entry/exit events are sent to | |
1511 // track stack depth. If it is possible to enter interp_only_mode we add | |
1512 // the code to check if the event should be sent. | |
1513 if (mode == NotifyJVMTI && JvmtiExport::can_post_interpreter_events()) { | |
1514 Label L; | |
1515 // Note: frame::interpreter_frame_result has a dependency on how the | |
1516 // method result is saved across the call to post_method_exit. If this | |
1517 // is changed then the interpreter_frame_result implementation will | |
1518 // need to be updated too. | |
304 | 1519 |
1520 // For c++ interpreter the result is always stored at a known location in the frame | |
1521 // template interpreter will leave it on the top of the stack. | |
1522 NOT_CC_INTERP(push(state);) | |
0 | 1523 movl(rdx, Address(r15_thread, JavaThread::interp_only_mode_offset())); |
1524 testl(rdx, rdx); | |
1525 jcc(Assembler::zero, L); | |
1526 call_VM(noreg, | |
1527 CAST_FROM_FN_PTR(address, InterpreterRuntime::post_method_exit)); | |
1528 bind(L); | |
304 | 1529 NOT_CC_INTERP(pop(state)); |
0 | 1530 } |
1531 | |
1532 { | |
1533 SkipIfEqual skip(this, &DTraceMethodProbes, false); | |
304 | 1534 NOT_CC_INTERP(push(state)); |
0 | 1535 get_method(c_rarg1); |
1536 call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_exit), | |
1537 r15_thread, c_rarg1); | |
304 | 1538 NOT_CC_INTERP(pop(state)); |
0 | 1539 } |
1540 } | |
1783 | 1541 |
1542 // Jump if ((*counter_addr += increment) & mask) satisfies the condition. | |
1543 void InterpreterMacroAssembler::increment_mask_and_jump(Address counter_addr, | |
1544 int increment, int mask, | |
1545 Register scratch, bool preloaded, | |
1546 Condition cond, Label* where) { | |
1547 if (!preloaded) { | |
1548 movl(scratch, counter_addr); | |
1549 } | |
1550 incrementl(scratch, increment); | |
1551 movl(counter_addr, scratch); | |
1552 andl(scratch, mask); | |
1553 jcc(cond, *where); | |
1554 } |