Mercurial > hg > graal-jvmci-8
annotate src/cpu/x86/vm/interp_masm_x86_64.cpp @ 24234:ea6f94ab283b default tip
Added tag jvmci-0.36 for changeset 8128b98d4736
author | Gilles Duboscq <gilles.m.duboscq@oracle.com> |
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date | Mon, 18 Sep 2017 18:49:45 +0200 |
parents | b5f3a471e646 |
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rev | line source |
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0 | 1 /* |
23614 | 2 * Copyright (c) 2003, 2016, 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 |
23614 | 152 case ztos: // fall through |
0 | 153 case ctos: // fall through |
154 case stos: // fall through | |
155 case itos: movl(rax, val_addr); break; | |
156 case ftos: movflt(xmm0, val_addr); break; | |
157 case dtos: movdbl(xmm0, val_addr); break; | |
158 case vtos: /* nothing to do */ break; | |
159 default : ShouldNotReachHere(); | |
160 } | |
161 // Clean up tos value in the thread object | |
162 movl(tos_addr, (int) ilgl); | |
304 | 163 movl(val_addr, (int32_t) NULL_WORD); |
0 | 164 } |
165 | |
166 | |
167 void InterpreterMacroAssembler::check_and_handle_earlyret(Register java_thread) { | |
168 if (JvmtiExport::can_force_early_return()) { | |
169 Label L; | |
304 | 170 movptr(c_rarg0, Address(r15_thread, JavaThread::jvmti_thread_state_offset())); |
171 testptr(c_rarg0, c_rarg0); | |
0 | 172 jcc(Assembler::zero, L); // if (thread->jvmti_thread_state() == NULL) exit; |
173 | |
174 // Initiate earlyret handling only if it is not already being processed. | |
175 // If the flag has the earlyret_processing bit set, it means that this code | |
176 // is called *during* earlyret handling - we don't want to reenter. | |
177 movl(c_rarg0, Address(c_rarg0, JvmtiThreadState::earlyret_state_offset())); | |
178 cmpl(c_rarg0, JvmtiThreadState::earlyret_pending); | |
179 jcc(Assembler::notEqual, L); | |
180 | |
181 // Call Interpreter::remove_activation_early_entry() to get the address of the | |
182 // same-named entrypoint in the generated interpreter code. | |
304 | 183 movptr(c_rarg0, Address(r15_thread, JavaThread::jvmti_thread_state_offset())); |
0 | 184 movl(c_rarg0, Address(c_rarg0, JvmtiThreadState::earlyret_tos_offset())); |
185 call_VM_leaf(CAST_FROM_FN_PTR(address, Interpreter::remove_activation_early_entry), c_rarg0); | |
186 jmp(rax); | |
187 bind(L); | |
188 } | |
189 } | |
190 | |
191 | |
192 void InterpreterMacroAssembler::get_unsigned_2_byte_index_at_bcp( | |
193 Register reg, | |
194 int bcp_offset) { | |
195 assert(bcp_offset >= 0, "bcp is still pointing to start of bytecode"); | |
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196 load_unsigned_short(reg, Address(r13, bcp_offset)); |
0 | 197 bswapl(reg); |
198 shrl(reg, 16); | |
199 } | |
200 | |
201 | |
1108 | 202 void InterpreterMacroAssembler::get_cache_index_at_bcp(Register index, |
203 int bcp_offset, | |
1565 | 204 size_t index_size) { |
1108 | 205 assert(bcp_offset > 0, "bcp is still pointing to start of bytecode"); |
1565 | 206 if (index_size == sizeof(u2)) { |
1108 | 207 load_unsigned_short(index, Address(r13, bcp_offset)); |
1565 | 208 } else if (index_size == sizeof(u4)) { |
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209 assert(EnableInvokeDynamic, "giant index used only for JSR 292"); |
1108 | 210 movl(index, Address(r13, bcp_offset)); |
211 // Check if the secondary index definition is still ~x, otherwise | |
212 // we have to change the following assembler code to calculate the | |
213 // plain index. | |
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214 assert(ConstantPool::decode_invokedynamic_index(~123) == 123, "else change next line"); |
1108 | 215 notl(index); // convert to plain index |
1565 | 216 } else if (index_size == sizeof(u1)) { |
217 load_unsigned_byte(index, Address(r13, bcp_offset)); | |
218 } else { | |
219 ShouldNotReachHere(); | |
1108 | 220 } |
221 } | |
222 | |
223 | |
0 | 224 void InterpreterMacroAssembler::get_cache_and_index_at_bcp(Register cache, |
225 Register index, | |
1108 | 226 int bcp_offset, |
1565 | 227 size_t index_size) { |
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228 assert_different_registers(cache, index); |
1565 | 229 get_cache_index_at_bcp(index, bcp_offset, index_size); |
304 | 230 movptr(cache, Address(rbp, frame::interpreter_frame_cache_offset * wordSize)); |
0 | 231 assert(sizeof(ConstantPoolCacheEntry) == 4 * wordSize, "adjust code below"); |
232 // convert from field index to ConstantPoolCacheEntry index | |
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233 assert(exact_log2(in_words(ConstantPoolCacheEntry::size())) == 2, "else change next line"); |
0 | 234 shll(index, 2); |
235 } | |
236 | |
237 | |
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238 void InterpreterMacroAssembler::get_cache_and_index_and_bytecode_at_bcp(Register cache, |
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239 Register index, |
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240 Register bytecode, |
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241 int byte_no, |
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242 int bcp_offset, |
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243 size_t index_size) { |
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244 get_cache_and_index_at_bcp(cache, index, bcp_offset, index_size); |
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245 // We use a 32-bit load here since the layout of 64-bit words on |
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246 // little-endian machines allow us that. |
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247 movl(bytecode, Address(cache, index, Address::times_ptr, ConstantPoolCache::base_offset() + ConstantPoolCacheEntry::indices_offset())); |
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248 const int shift_count = (1 + byte_no) * BitsPerByte; |
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249 assert((byte_no == TemplateTable::f1_byte && shift_count == ConstantPoolCacheEntry::bytecode_1_shift) || |
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250 (byte_no == TemplateTable::f2_byte && shift_count == ConstantPoolCacheEntry::bytecode_2_shift), |
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251 "correct shift count"); |
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252 shrl(bytecode, shift_count); |
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253 assert(ConstantPoolCacheEntry::bytecode_1_mask == ConstantPoolCacheEntry::bytecode_2_mask, "common mask"); |
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254 andl(bytecode, ConstantPoolCacheEntry::bytecode_1_mask); |
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255 } |
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256 |
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257 |
0 | 258 void InterpreterMacroAssembler::get_cache_entry_pointer_at_bcp(Register cache, |
259 Register tmp, | |
1108 | 260 int bcp_offset, |
1565 | 261 size_t index_size) { |
0 | 262 assert(cache != tmp, "must use different register"); |
1565 | 263 get_cache_index_at_bcp(tmp, bcp_offset, index_size); |
0 | 264 assert(sizeof(ConstantPoolCacheEntry) == 4 * wordSize, "adjust code below"); |
265 // convert from field index to ConstantPoolCacheEntry index | |
266 // and from word offset to byte offset | |
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267 assert(exact_log2(in_bytes(ConstantPoolCacheEntry::size_in_bytes())) == 2 + LogBytesPerWord, "else change next line"); |
0 | 268 shll(tmp, 2 + LogBytesPerWord); |
304 | 269 movptr(cache, Address(rbp, frame::interpreter_frame_cache_offset * wordSize)); |
0 | 270 // skip past the header |
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271 addptr(cache, in_bytes(ConstantPoolCache::base_offset())); |
304 | 272 addptr(cache, tmp); // construct pointer to cache entry |
0 | 273 } |
274 | |
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275 void InterpreterMacroAssembler::get_method_counters(Register method, |
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276 Register mcs, Label& skip) { |
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277 Label has_counters; |
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278 movptr(mcs, Address(method, Method::method_counters_offset())); |
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279 testptr(mcs, mcs); |
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280 jcc(Assembler::notZero, has_counters); |
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281 call_VM(noreg, CAST_FROM_FN_PTR(address, |
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282 InterpreterRuntime::build_method_counters), method); |
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283 movptr(mcs, Address(method,Method::method_counters_offset())); |
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284 testptr(mcs, mcs); |
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285 jcc(Assembler::zero, skip); // No MethodCounters allocated, OutOfMemory |
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286 bind(has_counters); |
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287 } |
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288 |
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289 // Load object from cpool->resolved_references(index) |
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290 void InterpreterMacroAssembler::load_resolved_reference_at_index( |
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291 Register result, Register index) { |
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292 assert_different_registers(result, index); |
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293 // convert from field index to resolved_references() index and from |
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294 // word index to byte offset. Since this is a java object, it can be compressed |
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295 Register tmp = index; // reuse |
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296 shll(tmp, LogBytesPerHeapOop); |
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297 |
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298 get_constant_pool(result); |
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299 // load pointer for resolved_references[] objArray |
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300 movptr(result, Address(result, ConstantPool::resolved_references_offset_in_bytes())); |
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301 // JNIHandles::resolve(obj); |
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302 movptr(result, Address(result, 0)); |
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303 // Add in the index |
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304 addptr(result, tmp); |
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305 load_heap_oop(result, Address(result, arrayOopDesc::base_offset_in_bytes(T_OBJECT))); |
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306 } |
0 | 307 |
308 // Generate a subtype check: branch to ok_is_subtype if sub_klass is a | |
309 // subtype of super_klass. | |
310 // | |
311 // Args: | |
312 // rax: superklass | |
313 // Rsub_klass: subklass | |
314 // | |
315 // Kills: | |
316 // rcx, rdi | |
317 void InterpreterMacroAssembler::gen_subtype_check(Register Rsub_klass, | |
318 Label& ok_is_subtype) { | |
319 assert(Rsub_klass != rax, "rax holds superklass"); | |
320 assert(Rsub_klass != r14, "r14 holds locals"); | |
321 assert(Rsub_klass != r13, "r13 holds bcp"); | |
322 assert(Rsub_klass != rcx, "rcx holds 2ndary super array length"); | |
323 assert(Rsub_klass != rdi, "rdi holds 2ndary super array scan ptr"); | |
324 | |
325 // Profile the not-null value's klass. | |
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326 profile_typecheck(rcx, Rsub_klass, rdi); // blows rcx, reloads rdi |
0 | 327 |
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328 // Do the check. |
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329 check_klass_subtype(Rsub_klass, rax, rcx, ok_is_subtype); // blows rcx |
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330 |
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331 // Profile the failure of the check. |
0 | 332 profile_typecheck_failed(rcx); // blows rcx |
333 } | |
334 | |
335 | |
304 | 336 |
0 | 337 // Java Expression Stack |
338 | |
339 void InterpreterMacroAssembler::pop_ptr(Register r) { | |
304 | 340 pop(r); |
0 | 341 } |
342 | |
343 void InterpreterMacroAssembler::pop_i(Register r) { | |
304 | 344 // XXX can't use pop currently, upper half non clean |
0 | 345 movl(r, Address(rsp, 0)); |
304 | 346 addptr(rsp, wordSize); |
0 | 347 } |
348 | |
349 void InterpreterMacroAssembler::pop_l(Register r) { | |
350 movq(r, Address(rsp, 0)); | |
1506 | 351 addptr(rsp, 2 * Interpreter::stackElementSize); |
0 | 352 } |
353 | |
354 void InterpreterMacroAssembler::pop_f(XMMRegister r) { | |
355 movflt(r, Address(rsp, 0)); | |
304 | 356 addptr(rsp, wordSize); |
0 | 357 } |
358 | |
359 void InterpreterMacroAssembler::pop_d(XMMRegister r) { | |
360 movdbl(r, Address(rsp, 0)); | |
1506 | 361 addptr(rsp, 2 * Interpreter::stackElementSize); |
0 | 362 } |
363 | |
364 void InterpreterMacroAssembler::push_ptr(Register r) { | |
304 | 365 push(r); |
0 | 366 } |
367 | |
368 void InterpreterMacroAssembler::push_i(Register r) { | |
304 | 369 push(r); |
0 | 370 } |
371 | |
372 void InterpreterMacroAssembler::push_l(Register r) { | |
1506 | 373 subptr(rsp, 2 * wordSize); |
0 | 374 movq(Address(rsp, 0), r); |
375 } | |
376 | |
377 void InterpreterMacroAssembler::push_f(XMMRegister r) { | |
304 | 378 subptr(rsp, wordSize); |
0 | 379 movflt(Address(rsp, 0), r); |
380 } | |
381 | |
382 void InterpreterMacroAssembler::push_d(XMMRegister r) { | |
1506 | 383 subptr(rsp, 2 * wordSize); |
0 | 384 movdbl(Address(rsp, 0), r); |
385 } | |
386 | |
387 void InterpreterMacroAssembler::pop(TosState state) { | |
388 switch (state) { | |
389 case atos: pop_ptr(); break; | |
390 case btos: | |
23614 | 391 case ztos: |
0 | 392 case ctos: |
393 case stos: | |
394 case itos: pop_i(); break; | |
395 case ltos: pop_l(); break; | |
396 case ftos: pop_f(); break; | |
397 case dtos: pop_d(); break; | |
398 case vtos: /* nothing to do */ break; | |
399 default: ShouldNotReachHere(); | |
400 } | |
401 verify_oop(rax, state); | |
402 } | |
403 | |
404 void InterpreterMacroAssembler::push(TosState state) { | |
405 verify_oop(rax, state); | |
406 switch (state) { | |
407 case atos: push_ptr(); break; | |
408 case btos: | |
23614 | 409 case ztos: |
0 | 410 case ctos: |
411 case stos: | |
412 case itos: push_i(); break; | |
413 case ltos: push_l(); break; | |
414 case ftos: push_f(); break; | |
415 case dtos: push_d(); break; | |
416 case vtos: /* nothing to do */ break; | |
417 default : ShouldNotReachHere(); | |
418 } | |
419 } | |
420 | |
421 | |
1506 | 422 // Helpers for swap and dup |
423 void InterpreterMacroAssembler::load_ptr(int n, Register val) { | |
304 | 424 movptr(val, Address(rsp, Interpreter::expr_offset_in_bytes(n))); |
0 | 425 } |
426 | |
1506 | 427 void InterpreterMacroAssembler::store_ptr(int n, Register val) { |
428 movptr(Address(rsp, Interpreter::expr_offset_in_bytes(n)), val); | |
0 | 429 } |
430 | |
431 | |
710 | 432 void InterpreterMacroAssembler::prepare_to_jump_from_interpreted() { |
0 | 433 // set sender sp |
304 | 434 lea(r13, Address(rsp, wordSize)); |
0 | 435 // record last_sp |
304 | 436 movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), r13); |
710 | 437 } |
438 | |
439 | |
440 // Jump to from_interpreted entry of a call unless single stepping is possible | |
441 // in this thread in which case we must call the i2i entry | |
442 void InterpreterMacroAssembler::jump_from_interpreted(Register method, Register temp) { | |
443 prepare_to_jump_from_interpreted(); | |
0 | 444 |
445 if (JvmtiExport::can_post_interpreter_events()) { | |
446 Label run_compiled_code; | |
447 // JVMTI events, such as single-stepping, are implemented partly by avoiding running | |
448 // compiled code in threads for which the event is enabled. Check here for | |
449 // interp_only_mode if these events CAN be enabled. | |
450 // interp_only is an int, on little endian it is sufficient to test the byte only | |
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451 // Is a cmpl faster? |
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452 cmpb(Address(r15_thread, JavaThread::interp_only_mode_offset()), 0); |
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453 jccb(Assembler::zero, run_compiled_code); |
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454 jmp(Address(method, Method::interpreter_entry_offset())); |
0 | 455 bind(run_compiled_code); |
456 } | |
457 | |
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458 jmp(Address(method, Method::from_interpreted_offset())); |
0 | 459 |
460 } | |
461 | |
462 | |
463 // The following two routines provide a hook so that an implementation | |
464 // can schedule the dispatch in two parts. amd64 does not do this. | |
465 void InterpreterMacroAssembler::dispatch_prolog(TosState state, int step) { | |
466 // Nothing amd64 specific to be done here | |
467 } | |
468 | |
469 void InterpreterMacroAssembler::dispatch_epilog(TosState state, int step) { | |
470 dispatch_next(state, step); | |
471 } | |
472 | |
473 void InterpreterMacroAssembler::dispatch_base(TosState state, | |
474 address* table, | |
475 bool verifyoop) { | |
476 verify_FPU(1, state); | |
477 if (VerifyActivationFrameSize) { | |
478 Label L; | |
304 | 479 mov(rcx, rbp); |
480 subptr(rcx, rsp); | |
481 int32_t min_frame_size = | |
0 | 482 (frame::link_offset - frame::interpreter_frame_initial_sp_offset) * |
483 wordSize; | |
304 | 484 cmpptr(rcx, (int32_t)min_frame_size); |
0 | 485 jcc(Assembler::greaterEqual, L); |
486 stop("broken stack frame"); | |
487 bind(L); | |
488 } | |
489 if (verifyoop) { | |
490 verify_oop(rax, state); | |
491 } | |
492 lea(rscratch1, ExternalAddress((address)table)); | |
493 jmp(Address(rscratch1, rbx, Address::times_8)); | |
494 } | |
495 | |
496 void InterpreterMacroAssembler::dispatch_only(TosState state) { | |
497 dispatch_base(state, Interpreter::dispatch_table(state)); | |
498 } | |
499 | |
500 void InterpreterMacroAssembler::dispatch_only_normal(TosState state) { | |
501 dispatch_base(state, Interpreter::normal_table(state)); | |
502 } | |
503 | |
504 void InterpreterMacroAssembler::dispatch_only_noverify(TosState state) { | |
505 dispatch_base(state, Interpreter::normal_table(state), false); | |
506 } | |
507 | |
508 | |
509 void InterpreterMacroAssembler::dispatch_next(TosState state, int step) { | |
510 // load next bytecode (load before advancing r13 to prevent AGI) | |
511 load_unsigned_byte(rbx, Address(r13, step)); | |
512 // advance r13 | |
304 | 513 increment(r13, step); |
0 | 514 dispatch_base(state, Interpreter::dispatch_table(state)); |
515 } | |
516 | |
517 void InterpreterMacroAssembler::dispatch_via(TosState state, address* table) { | |
518 // load current bytecode | |
519 load_unsigned_byte(rbx, Address(r13, 0)); | |
520 dispatch_base(state, table); | |
521 } | |
522 | |
523 // remove activation | |
524 // | |
525 // Unlock the receiver if this is a synchronized method. | |
526 // Unlock any Java monitors from syncronized blocks. | |
527 // Remove the activation from the stack. | |
528 // | |
529 // If there are locked Java monitors | |
530 // If throw_monitor_exception | |
531 // throws IllegalMonitorStateException | |
532 // Else if install_monitor_exception | |
533 // installs IllegalMonitorStateException | |
534 // Else | |
535 // no error processing | |
536 void InterpreterMacroAssembler::remove_activation( | |
537 TosState state, | |
538 Register ret_addr, | |
539 bool throw_monitor_exception, | |
540 bool install_monitor_exception, | |
541 bool notify_jvmdi) { | |
542 // Note: Registers rdx xmm0 may be in use for the | |
543 // result check if synchronized method | |
544 Label unlocked, unlock, no_unlock; | |
545 | |
546 // get the value of _do_not_unlock_if_synchronized into rdx | |
547 const Address do_not_unlock_if_synchronized(r15_thread, | |
548 in_bytes(JavaThread::do_not_unlock_if_synchronized_offset())); | |
549 movbool(rdx, do_not_unlock_if_synchronized); | |
550 movbool(do_not_unlock_if_synchronized, false); // reset the flag | |
551 | |
552 // get method access flags | |
304 | 553 movptr(rbx, Address(rbp, frame::interpreter_frame_method_offset * wordSize)); |
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554 movl(rcx, Address(rbx, Method::access_flags_offset())); |
0 | 555 testl(rcx, JVM_ACC_SYNCHRONIZED); |
556 jcc(Assembler::zero, unlocked); | |
557 | |
558 // Don't unlock anything if the _do_not_unlock_if_synchronized flag | |
559 // is set. | |
560 testbool(rdx); | |
561 jcc(Assembler::notZero, no_unlock); | |
562 | |
563 // unlock monitor | |
564 push(state); // save result | |
565 | |
566 // BasicObjectLock will be first in list, since this is a | |
567 // synchronized method. However, need to check that the object has | |
568 // not been unlocked by an explicit monitorexit bytecode. | |
569 const Address monitor(rbp, frame::interpreter_frame_initial_sp_offset * | |
570 wordSize - (int) sizeof(BasicObjectLock)); | |
571 // We use c_rarg1 so that if we go slow path it will be the correct | |
572 // register for unlock_object to pass to VM directly | |
304 | 573 lea(c_rarg1, monitor); // address of first monitor |
0 | 574 |
304 | 575 movptr(rax, Address(c_rarg1, BasicObjectLock::obj_offset_in_bytes())); |
576 testptr(rax, rax); | |
0 | 577 jcc(Assembler::notZero, unlock); |
578 | |
579 pop(state); | |
580 if (throw_monitor_exception) { | |
581 // Entry already unlocked, need to throw exception | |
582 call_VM(noreg, CAST_FROM_FN_PTR(address, | |
583 InterpreterRuntime::throw_illegal_monitor_state_exception)); | |
584 should_not_reach_here(); | |
585 } else { | |
586 // Monitor already unlocked during a stack unroll. If requested, | |
587 // install an illegal_monitor_state_exception. Continue with | |
588 // stack unrolling. | |
589 if (install_monitor_exception) { | |
590 call_VM(noreg, CAST_FROM_FN_PTR(address, | |
591 InterpreterRuntime::new_illegal_monitor_state_exception)); | |
592 } | |
593 jmp(unlocked); | |
594 } | |
595 | |
596 bind(unlock); | |
597 unlock_object(c_rarg1); | |
598 pop(state); | |
599 | |
600 // Check that for block-structured locking (i.e., that all locked | |
601 // objects has been unlocked) | |
602 bind(unlocked); | |
603 | |
604 // rax: Might contain return value | |
605 | |
606 // Check that all monitors are unlocked | |
607 { | |
608 Label loop, exception, entry, restart; | |
609 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize; | |
610 const Address monitor_block_top( | |
611 rbp, frame::interpreter_frame_monitor_block_top_offset * wordSize); | |
612 const Address monitor_block_bot( | |
613 rbp, frame::interpreter_frame_initial_sp_offset * wordSize); | |
614 | |
615 bind(restart); | |
616 // We use c_rarg1 so that if we go slow path it will be the correct | |
617 // register for unlock_object to pass to VM directly | |
304 | 618 movptr(c_rarg1, monitor_block_top); // points to current entry, starting |
0 | 619 // with top-most entry |
304 | 620 lea(rbx, monitor_block_bot); // points to word before bottom of |
0 | 621 // monitor block |
622 jmp(entry); | |
623 | |
624 // Entry already locked, need to throw exception | |
625 bind(exception); | |
626 | |
627 if (throw_monitor_exception) { | |
628 // Throw exception | |
629 MacroAssembler::call_VM(noreg, | |
630 CAST_FROM_FN_PTR(address, InterpreterRuntime:: | |
631 throw_illegal_monitor_state_exception)); | |
632 should_not_reach_here(); | |
633 } else { | |
634 // Stack unrolling. Unlock object and install illegal_monitor_exception. | |
635 // Unlock does not block, so don't have to worry about the frame. | |
636 // We don't have to preserve c_rarg1 since we are going to throw an exception. | |
637 | |
638 push(state); | |
639 unlock_object(c_rarg1); | |
640 pop(state); | |
641 | |
642 if (install_monitor_exception) { | |
643 call_VM(noreg, CAST_FROM_FN_PTR(address, | |
644 InterpreterRuntime:: | |
645 new_illegal_monitor_state_exception)); | |
646 } | |
647 | |
648 jmp(restart); | |
649 } | |
650 | |
651 bind(loop); | |
652 // check if current entry is used | |
304 | 653 cmpptr(Address(c_rarg1, BasicObjectLock::obj_offset_in_bytes()), (int32_t) NULL); |
0 | 654 jcc(Assembler::notEqual, exception); |
655 | |
304 | 656 addptr(c_rarg1, entry_size); // otherwise advance to next entry |
0 | 657 bind(entry); |
304 | 658 cmpptr(c_rarg1, rbx); // check if bottom reached |
0 | 659 jcc(Assembler::notEqual, loop); // if not at bottom then check this entry |
660 } | |
661 | |
662 bind(no_unlock); | |
663 | |
664 // jvmti support | |
665 if (notify_jvmdi) { | |
666 notify_method_exit(state, NotifyJVMTI); // preserve TOSCA | |
667 } else { | |
668 notify_method_exit(state, SkipNotifyJVMTI); // preserve TOSCA | |
669 } | |
670 | |
671 // remove activation | |
672 // get sender sp | |
304 | 673 movptr(rbx, |
674 Address(rbp, frame::interpreter_frame_sender_sp_offset * wordSize)); | |
0 | 675 leave(); // remove frame anchor |
304 | 676 pop(ret_addr); // get return address |
677 mov(rsp, rbx); // set sp to sender sp | |
0 | 678 } |
679 | |
304 | 680 #endif // C_INTERP |
681 | |
0 | 682 // Lock object |
683 // | |
684 // Args: | |
685 // c_rarg1: BasicObjectLock to be used for locking | |
686 // | |
687 // Kills: | |
688 // rax | |
689 // c_rarg0, c_rarg1, c_rarg2, c_rarg3, .. (param regs) | |
690 // rscratch1, rscratch2 (scratch regs) | |
691 void InterpreterMacroAssembler::lock_object(Register lock_reg) { | |
692 assert(lock_reg == c_rarg1, "The argument is only for looks. It must be c_rarg1"); | |
693 | |
694 if (UseHeavyMonitors) { | |
695 call_VM(noreg, | |
696 CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorenter), | |
697 lock_reg); | |
698 } else { | |
699 Label done; | |
700 | |
701 const Register swap_reg = rax; // Must use rax for cmpxchg instruction | |
702 const Register obj_reg = c_rarg3; // Will contain the oop | |
703 | |
704 const int obj_offset = BasicObjectLock::obj_offset_in_bytes(); | |
705 const int lock_offset = BasicObjectLock::lock_offset_in_bytes (); | |
706 const int mark_offset = lock_offset + | |
707 BasicLock::displaced_header_offset_in_bytes(); | |
708 | |
709 Label slow_case; | |
710 | |
711 // Load object pointer into obj_reg %c_rarg3 | |
304 | 712 movptr(obj_reg, Address(lock_reg, obj_offset)); |
0 | 713 |
714 if (UseBiasedLocking) { | |
715 biased_locking_enter(lock_reg, obj_reg, swap_reg, rscratch1, false, done, &slow_case); | |
716 } | |
717 | |
718 // Load immediate 1 into swap_reg %rax | |
719 movl(swap_reg, 1); | |
720 | |
721 // Load (object->mark() | 1) into swap_reg %rax | |
304 | 722 orptr(swap_reg, Address(obj_reg, 0)); |
0 | 723 |
724 // Save (object->mark() | 1) into BasicLock's displaced header | |
304 | 725 movptr(Address(lock_reg, mark_offset), swap_reg); |
0 | 726 |
727 assert(lock_offset == 0, | |
728 "displached header must be first word in BasicObjectLock"); | |
729 | |
730 if (os::is_MP()) lock(); | |
304 | 731 cmpxchgptr(lock_reg, Address(obj_reg, 0)); |
0 | 732 if (PrintBiasedLockingStatistics) { |
733 cond_inc32(Assembler::zero, | |
734 ExternalAddress((address) BiasedLocking::fast_path_entry_count_addr())); | |
735 } | |
736 jcc(Assembler::zero, done); | |
737 | |
738 // Test if the oopMark is an obvious stack pointer, i.e., | |
739 // 1) (mark & 7) == 0, and | |
740 // 2) rsp <= mark < mark + os::pagesize() | |
741 // | |
742 // These 3 tests can be done by evaluating the following | |
743 // expression: ((mark - rsp) & (7 - os::vm_page_size())), | |
744 // assuming both stack pointer and pagesize have their | |
745 // least significant 3 bits clear. | |
746 // NOTE: the oopMark is in swap_reg %rax as the result of cmpxchg | |
304 | 747 subptr(swap_reg, rsp); |
748 andptr(swap_reg, 7 - os::vm_page_size()); | |
0 | 749 |
750 // Save the test result, for recursive case, the result is zero | |
304 | 751 movptr(Address(lock_reg, mark_offset), swap_reg); |
0 | 752 |
753 if (PrintBiasedLockingStatistics) { | |
754 cond_inc32(Assembler::zero, | |
755 ExternalAddress((address) BiasedLocking::fast_path_entry_count_addr())); | |
756 } | |
757 jcc(Assembler::zero, done); | |
758 | |
759 bind(slow_case); | |
760 | |
761 // Call the runtime routine for slow case | |
762 call_VM(noreg, | |
763 CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorenter), | |
764 lock_reg); | |
765 | |
766 bind(done); | |
767 } | |
768 } | |
769 | |
770 | |
771 // Unlocks an object. Used in monitorexit bytecode and | |
772 // remove_activation. Throws an IllegalMonitorException if object is | |
773 // not locked by current thread. | |
774 // | |
775 // Args: | |
776 // c_rarg1: BasicObjectLock for lock | |
777 // | |
778 // Kills: | |
779 // rax | |
780 // c_rarg0, c_rarg1, c_rarg2, c_rarg3, ... (param regs) | |
781 // rscratch1, rscratch2 (scratch regs) | |
782 void InterpreterMacroAssembler::unlock_object(Register lock_reg) { | |
783 assert(lock_reg == c_rarg1, "The argument is only for looks. It must be rarg1"); | |
784 | |
785 if (UseHeavyMonitors) { | |
786 call_VM(noreg, | |
787 CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorexit), | |
788 lock_reg); | |
789 } else { | |
790 Label done; | |
791 | |
792 const Register swap_reg = rax; // Must use rax for cmpxchg instruction | |
793 const Register header_reg = c_rarg2; // Will contain the old oopMark | |
794 const Register obj_reg = c_rarg3; // Will contain the oop | |
795 | |
796 save_bcp(); // Save in case of exception | |
797 | |
798 // Convert from BasicObjectLock structure to object and BasicLock | |
799 // structure Store the BasicLock address into %rax | |
304 | 800 lea(swap_reg, Address(lock_reg, BasicObjectLock::lock_offset_in_bytes())); |
0 | 801 |
802 // Load oop into obj_reg(%c_rarg3) | |
304 | 803 movptr(obj_reg, Address(lock_reg, BasicObjectLock::obj_offset_in_bytes())); |
0 | 804 |
805 // Free entry | |
304 | 806 movptr(Address(lock_reg, BasicObjectLock::obj_offset_in_bytes()), (int32_t)NULL_WORD); |
0 | 807 |
808 if (UseBiasedLocking) { | |
809 biased_locking_exit(obj_reg, header_reg, done); | |
810 } | |
811 | |
812 // Load the old header from BasicLock structure | |
304 | 813 movptr(header_reg, Address(swap_reg, |
814 BasicLock::displaced_header_offset_in_bytes())); | |
0 | 815 |
816 // Test for recursion | |
304 | 817 testptr(header_reg, header_reg); |
0 | 818 |
819 // zero for recursive case | |
820 jcc(Assembler::zero, done); | |
821 | |
822 // Atomic swap back the old header | |
823 if (os::is_MP()) lock(); | |
304 | 824 cmpxchgptr(header_reg, Address(obj_reg, 0)); |
0 | 825 |
826 // zero for recursive case | |
827 jcc(Assembler::zero, done); | |
828 | |
829 // Call the runtime routine for slow case. | |
304 | 830 movptr(Address(lock_reg, BasicObjectLock::obj_offset_in_bytes()), |
0 | 831 obj_reg); // restore obj |
832 call_VM(noreg, | |
833 CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorexit), | |
834 lock_reg); | |
835 | |
836 bind(done); | |
837 | |
838 restore_bcp(); | |
839 } | |
840 } | |
841 | |
304 | 842 #ifndef CC_INTERP |
0 | 843 |
844 void InterpreterMacroAssembler::test_method_data_pointer(Register mdp, | |
845 Label& zero_continue) { | |
846 assert(ProfileInterpreter, "must be profiling interpreter"); | |
304 | 847 movptr(mdp, Address(rbp, frame::interpreter_frame_mdx_offset * wordSize)); |
848 testptr(mdp, mdp); | |
0 | 849 jcc(Assembler::zero, zero_continue); |
850 } | |
851 | |
852 | |
853 // Set the method data pointer for the current bcp. | |
854 void InterpreterMacroAssembler::set_method_data_pointer_for_bcp() { | |
855 assert(ProfileInterpreter, "must be profiling interpreter"); | |
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856 Label set_mdp; |
304 | 857 push(rax); |
858 push(rbx); | |
0 | 859 |
860 get_method(rbx); | |
861 // Test MDO to avoid the call if it is NULL. | |
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862 movptr(rax, Address(rbx, in_bytes(Method::method_data_offset()))); |
304 | 863 testptr(rax, rax); |
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864 jcc(Assembler::zero, set_mdp); |
0 | 865 // rbx: method |
866 // r13: bcp | |
867 call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::bcp_to_di), rbx, r13); | |
868 // rax: mdi | |
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869 // mdo is guaranteed to be non-zero here, we checked for it before the call. |
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870 movptr(rbx, Address(rbx, in_bytes(Method::method_data_offset()))); |
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871 addptr(rbx, in_bytes(MethodData::data_offset())); |
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872 addptr(rax, rbx); |
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873 bind(set_mdp); |
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874 movptr(Address(rbp, frame::interpreter_frame_mdx_offset * wordSize), rax); |
304 | 875 pop(rbx); |
876 pop(rax); | |
0 | 877 } |
878 | |
879 void InterpreterMacroAssembler::verify_method_data_pointer() { | |
880 assert(ProfileInterpreter, "must be profiling interpreter"); | |
881 #ifdef ASSERT | |
882 Label verify_continue; | |
304 | 883 push(rax); |
884 push(rbx); | |
885 push(c_rarg3); | |
886 push(c_rarg2); | |
0 | 887 test_method_data_pointer(c_rarg3, verify_continue); // If mdp is zero, continue |
888 get_method(rbx); | |
889 | |
890 // If the mdp is valid, it will point to a DataLayout header which is | |
891 // consistent with the bcp. The converse is highly probable also. | |
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892 load_unsigned_short(c_rarg2, |
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893 Address(c_rarg3, in_bytes(DataLayout::bci_offset()))); |
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894 addptr(c_rarg2, Address(rbx, Method::const_offset())); |
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895 lea(c_rarg2, Address(c_rarg2, ConstMethod::codes_offset())); |
304 | 896 cmpptr(c_rarg2, r13); |
0 | 897 jcc(Assembler::equal, verify_continue); |
898 // rbx: method | |
899 // r13: bcp | |
900 // c_rarg3: mdp | |
901 call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::verify_mdp), | |
902 rbx, r13, c_rarg3); | |
903 bind(verify_continue); | |
304 | 904 pop(c_rarg2); |
905 pop(c_rarg3); | |
906 pop(rbx); | |
907 pop(rax); | |
0 | 908 #endif // ASSERT |
909 } | |
910 | |
911 | |
912 void InterpreterMacroAssembler::set_mdp_data_at(Register mdp_in, | |
913 int constant, | |
914 Register value) { | |
915 assert(ProfileInterpreter, "must be profiling interpreter"); | |
916 Address data(mdp_in, constant); | |
304 | 917 movptr(data, value); |
0 | 918 } |
919 | |
920 | |
921 void InterpreterMacroAssembler::increment_mdp_data_at(Register mdp_in, | |
922 int constant, | |
923 bool decrement) { | |
924 // Counter address | |
925 Address data(mdp_in, constant); | |
926 | |
927 increment_mdp_data_at(data, decrement); | |
928 } | |
929 | |
930 void InterpreterMacroAssembler::increment_mdp_data_at(Address data, | |
931 bool decrement) { | |
932 assert(ProfileInterpreter, "must be profiling interpreter"); | |
304 | 933 // %%% this does 64bit counters at best it is wasting space |
934 // at worst it is a rare bug when counters overflow | |
0 | 935 |
936 if (decrement) { | |
937 // Decrement the register. Set condition codes. | |
304 | 938 addptr(data, (int32_t) -DataLayout::counter_increment); |
0 | 939 // If the decrement causes the counter to overflow, stay negative |
940 Label L; | |
941 jcc(Assembler::negative, L); | |
304 | 942 addptr(data, (int32_t) DataLayout::counter_increment); |
0 | 943 bind(L); |
944 } else { | |
945 assert(DataLayout::counter_increment == 1, | |
946 "flow-free idiom only works with 1"); | |
947 // Increment the register. Set carry flag. | |
304 | 948 addptr(data, DataLayout::counter_increment); |
0 | 949 // If the increment causes the counter to overflow, pull back by 1. |
304 | 950 sbbptr(data, (int32_t)0); |
0 | 951 } |
952 } | |
953 | |
954 | |
955 void InterpreterMacroAssembler::increment_mdp_data_at(Register mdp_in, | |
956 Register reg, | |
957 int constant, | |
958 bool decrement) { | |
959 Address data(mdp_in, reg, Address::times_1, constant); | |
960 | |
961 increment_mdp_data_at(data, decrement); | |
962 } | |
963 | |
964 void InterpreterMacroAssembler::set_mdp_flag_at(Register mdp_in, | |
965 int flag_byte_constant) { | |
966 assert(ProfileInterpreter, "must be profiling interpreter"); | |
967 int header_offset = in_bytes(DataLayout::header_offset()); | |
968 int header_bits = DataLayout::flag_mask_to_header_mask(flag_byte_constant); | |
969 // Set the flag | |
970 orl(Address(mdp_in, header_offset), header_bits); | |
971 } | |
972 | |
973 | |
974 | |
975 void InterpreterMacroAssembler::test_mdp_data_at(Register mdp_in, | |
976 int offset, | |
977 Register value, | |
978 Register test_value_out, | |
979 Label& not_equal_continue) { | |
980 assert(ProfileInterpreter, "must be profiling interpreter"); | |
981 if (test_value_out == noreg) { | |
304 | 982 cmpptr(value, Address(mdp_in, offset)); |
0 | 983 } else { |
984 // Put the test value into a register, so caller can use it: | |
304 | 985 movptr(test_value_out, Address(mdp_in, offset)); |
986 cmpptr(test_value_out, value); | |
0 | 987 } |
988 jcc(Assembler::notEqual, not_equal_continue); | |
989 } | |
990 | |
991 | |
992 void InterpreterMacroAssembler::update_mdp_by_offset(Register mdp_in, | |
993 int offset_of_disp) { | |
994 assert(ProfileInterpreter, "must be profiling interpreter"); | |
995 Address disp_address(mdp_in, offset_of_disp); | |
304 | 996 addptr(mdp_in, disp_address); |
997 movptr(Address(rbp, frame::interpreter_frame_mdx_offset * wordSize), mdp_in); | |
0 | 998 } |
999 | |
1000 | |
1001 void InterpreterMacroAssembler::update_mdp_by_offset(Register mdp_in, | |
1002 Register reg, | |
1003 int offset_of_disp) { | |
1004 assert(ProfileInterpreter, "must be profiling interpreter"); | |
1005 Address disp_address(mdp_in, reg, Address::times_1, offset_of_disp); | |
304 | 1006 addptr(mdp_in, disp_address); |
1007 movptr(Address(rbp, frame::interpreter_frame_mdx_offset * wordSize), mdp_in); | |
0 | 1008 } |
1009 | |
1010 | |
1011 void InterpreterMacroAssembler::update_mdp_by_constant(Register mdp_in, | |
1012 int constant) { | |
1013 assert(ProfileInterpreter, "must be profiling interpreter"); | |
304 | 1014 addptr(mdp_in, constant); |
1015 movptr(Address(rbp, frame::interpreter_frame_mdx_offset * wordSize), mdp_in); | |
0 | 1016 } |
1017 | |
1018 | |
1019 void InterpreterMacroAssembler::update_mdp_for_ret(Register return_bci) { | |
1020 assert(ProfileInterpreter, "must be profiling interpreter"); | |
304 | 1021 push(return_bci); // save/restore across call_VM |
0 | 1022 call_VM(noreg, |
1023 CAST_FROM_FN_PTR(address, InterpreterRuntime::update_mdp_for_ret), | |
1024 return_bci); | |
304 | 1025 pop(return_bci); |
0 | 1026 } |
1027 | |
1028 | |
1029 void InterpreterMacroAssembler::profile_taken_branch(Register mdp, | |
1030 Register bumped_count) { | |
1031 if (ProfileInterpreter) { | |
1032 Label profile_continue; | |
1033 | |
1034 // If no method data exists, go to profile_continue. | |
1035 // Otherwise, assign to mdp | |
1036 test_method_data_pointer(mdp, profile_continue); | |
1037 | |
1038 // We are taking a branch. Increment the taken count. | |
1039 // We inline increment_mdp_data_at to return bumped_count in a register | |
1040 //increment_mdp_data_at(mdp, in_bytes(JumpData::taken_offset())); | |
1041 Address data(mdp, in_bytes(JumpData::taken_offset())); | |
304 | 1042 movptr(bumped_count, data); |
0 | 1043 assert(DataLayout::counter_increment == 1, |
1044 "flow-free idiom only works with 1"); | |
304 | 1045 addptr(bumped_count, DataLayout::counter_increment); |
1046 sbbptr(bumped_count, 0); | |
1047 movptr(data, bumped_count); // Store back out | |
0 | 1048 |
1049 // The method data pointer needs to be updated to reflect the new target. | |
1050 update_mdp_by_offset(mdp, in_bytes(JumpData::displacement_offset())); | |
1051 bind(profile_continue); | |
1052 } | |
1053 } | |
1054 | |
1055 | |
1056 void InterpreterMacroAssembler::profile_not_taken_branch(Register mdp) { | |
1057 if (ProfileInterpreter) { | |
1058 Label profile_continue; | |
1059 | |
1060 // If no method data exists, go to profile_continue. | |
1061 test_method_data_pointer(mdp, profile_continue); | |
1062 | |
1063 // We are taking a branch. Increment the not taken count. | |
1064 increment_mdp_data_at(mdp, in_bytes(BranchData::not_taken_offset())); | |
1065 | |
1066 // The method data pointer needs to be updated to correspond to | |
1067 // the next bytecode | |
1068 update_mdp_by_constant(mdp, in_bytes(BranchData::branch_data_size())); | |
1069 bind(profile_continue); | |
1070 } | |
1071 } | |
1072 | |
1073 void InterpreterMacroAssembler::profile_call(Register mdp) { | |
1074 if (ProfileInterpreter) { | |
1075 Label profile_continue; | |
1076 | |
1077 // If no method data exists, go to profile_continue. | |
1078 test_method_data_pointer(mdp, profile_continue); | |
1079 | |
1080 // We are making a call. Increment the count. | |
1081 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset())); | |
1082 | |
1083 // The method data pointer needs to be updated to reflect the new target. | |
1084 update_mdp_by_constant(mdp, in_bytes(CounterData::counter_data_size())); | |
1085 bind(profile_continue); | |
1086 } | |
1087 } | |
1088 | |
1089 | |
1090 void InterpreterMacroAssembler::profile_final_call(Register mdp) { | |
1091 if (ProfileInterpreter) { | |
1092 Label profile_continue; | |
1093 | |
1094 // If no method data exists, go to profile_continue. | |
1095 test_method_data_pointer(mdp, profile_continue); | |
1096 | |
1097 // We are making a call. Increment the count. | |
1098 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset())); | |
1099 | |
1100 // The method data pointer needs to be updated to reflect the new target. | |
1101 update_mdp_by_constant(mdp, | |
1102 in_bytes(VirtualCallData:: | |
1103 virtual_call_data_size())); | |
1104 bind(profile_continue); | |
1105 } | |
1106 } | |
1107 | |
1108 | |
1109 void InterpreterMacroAssembler::profile_virtual_call(Register receiver, | |
1110 Register mdp, | |
1108 | 1111 Register reg2, |
1112 bool receiver_can_be_null) { | |
0 | 1113 if (ProfileInterpreter) { |
1114 Label profile_continue; | |
1115 | |
1116 // If no method data exists, go to profile_continue. | |
1117 test_method_data_pointer(mdp, profile_continue); | |
1118 | |
1108 | 1119 Label skip_receiver_profile; |
1120 if (receiver_can_be_null) { | |
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1121 Label not_null; |
1108 | 1122 testptr(receiver, receiver); |
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1123 jccb(Assembler::notZero, not_null); |
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1124 // We are making a call. Increment the count for null receiver. |
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1125 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset())); |
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1126 jmp(skip_receiver_profile); |
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1127 bind(not_null); |
1108 | 1128 } |
1129 | |
0 | 1130 // Record the receiver type. |
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1131 record_klass_in_profile(receiver, mdp, reg2, true); |
1108 | 1132 bind(skip_receiver_profile); |
0 | 1133 |
1134 // The method data pointer needs to be updated to reflect the new target. | |
22298 | 1135 #if INCLUDE_JVMCI |
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1136 if (MethodProfileWidth == 0) { |
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1137 update_mdp_by_constant(mdp, in_bytes(VirtualCallData::virtual_call_data_size())); |
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1138 } |
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1139 #else |
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1140 update_mdp_by_constant(mdp, in_bytes(VirtualCallData::virtual_call_data_size())); |
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1141 #endif |
0 | 1142 bind(profile_continue); |
1143 } | |
1144 } | |
1145 | |
22298 | 1146 #if INCLUDE_JVMCI |
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1147 void InterpreterMacroAssembler::profile_called_method(Register method, Register mdp, Register reg2) { |
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1148 assert_different_registers(method, mdp, reg2); |
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1149 if (ProfileInterpreter && MethodProfileWidth > 0) { |
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1150 Label profile_continue; |
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1151 |
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1152 // If no method data exists, go to profile_continue. |
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1153 test_method_data_pointer(mdp, profile_continue); |
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1154 |
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1155 Label done; |
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1156 record_item_in_profile_helper(method, mdp, reg2, 0, done, MethodProfileWidth, |
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1157 &VirtualCallData::method_offset, &VirtualCallData::method_count_offset, in_bytes(VirtualCallData::nonprofiled_receiver_count_offset())); |
10458 | 1158 bind(done); |
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1159 |
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1160 update_mdp_by_constant(mdp, in_bytes(VirtualCallData::virtual_call_data_size())); |
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1161 bind(profile_continue); |
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1162 } |
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1163 } |
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1164 #endif |
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1165 |
0 | 1166 // This routine creates a state machine for updating the multi-row |
1167 // type profile at a virtual call site (or other type-sensitive bytecode). | |
1168 // The machine visits each row (of receiver/count) until the receiver type | |
1169 // is found, or until it runs out of rows. At the same time, it remembers | |
1170 // the location of the first empty row. (An empty row records null for its | |
1171 // receiver, and can be allocated for a newly-observed receiver type.) | |
1172 // Because there are two degrees of freedom in the state, a simple linear | |
1173 // search will not work; it must be a decision tree. Hence this helper | |
1174 // function is recursive, to generate the required tree structured code. | |
1175 // It's the interpreter, so we are trading off code space for speed. | |
1176 // See below for example code. | |
1177 void InterpreterMacroAssembler::record_klass_in_profile_helper( | |
1178 Register receiver, Register mdp, | |
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1179 Register reg2, Label& done, bool is_virtual_call) { |
1206
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1180 if (TypeProfileWidth == 0) { |
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1181 if (is_virtual_call) { |
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1182 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset())); |
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1183 } |
22298 | 1184 #if INCLUDE_JVMCI |
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1185 else if (EnableJVMCI) { |
7154
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1186 increment_mdp_data_at(mdp, in_bytes(ReceiverTypeData::nonprofiled_receiver_count_offset())); |
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1187 } |
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1188 #endif |
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1189 } else { |
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1190 int non_profiled_offset = -1; |
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1191 if (is_virtual_call) { |
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1192 non_profiled_offset = in_bytes(CounterData::count_offset()); |
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1193 } |
22298 | 1194 #if INCLUDE_JVMCI |
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1195 else if (EnableJVMCI) { |
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1196 non_profiled_offset = in_bytes(ReceiverTypeData::nonprofiled_receiver_count_offset()); |
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1197 } |
22298 | 1198 #endif |
967
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1199 |
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1200 record_item_in_profile_helper(receiver, mdp, reg2, 0, done, TypeProfileWidth, |
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1201 &VirtualCallData::receiver_offset, &VirtualCallData::receiver_count_offset, non_profiled_offset); |
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1202 } |
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1203 } |
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1204 |
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1205 void InterpreterMacroAssembler::record_item_in_profile_helper(Register item, Register mdp, |
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1206 Register reg2, int start_row, Label& done, int total_rows, |
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1207 OffsetFunction item_offset_fn, OffsetFunction item_count_offset_fn, |
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1208 int non_profiled_offset) { |
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1209 int last_row = total_rows - 1; |
0 | 1210 assert(start_row <= last_row, "must be work left to do"); |
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1211 // Test this row for both the item and for null. |
0 | 1212 // Take any of three different outcomes: |
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1213 // 1. found item => increment count and goto done |
0 | 1214 // 2. found null => keep looking for case 1, maybe allocate this cell |
1215 // 3. found something else => keep looking for cases 1 and 2 | |
1216 // Case 3 is handled by a recursive call. | |
1217 for (int row = start_row; row <= last_row; row++) { | |
1218 Label next_test; | |
1219 bool test_for_null_also = (row == start_row); | |
1220 | |
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1221 // See if the item is item[n]. |
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1222 int item_offset = in_bytes(item_offset_fn(row)); |
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1223 test_mdp_data_at(mdp, item_offset, item, |
0 | 1224 (test_for_null_also ? reg2 : noreg), |
1225 next_test); | |
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1226 // (Reg2 now contains the item from the CallData.) |
0 | 1227 |
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1228 // The item is item[n]. Increment count[n]. |
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1229 int count_offset = in_bytes(item_count_offset_fn(row)); |
0 | 1230 increment_mdp_data_at(mdp, count_offset); |
1231 jmp(done); | |
1232 bind(next_test); | |
1233 | |
1234 if (test_for_null_also) { | |
1206
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1235 Label found_null; |
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1236 // Failed the equality check on item[n]... Test for null. |
304 | 1237 testptr(reg2, reg2); |
0 | 1238 if (start_row == last_row) { |
1239 // The only thing left to do is handle the null case. | |
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1240 if (non_profiled_offset >= 0) { |
1206
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1241 jccb(Assembler::zero, found_null); |
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1242 // Item did not match any saved item and there is no empty row for it. |
1251
576e77447e3c
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1243 // Increment total counter to indicate polymorphic case. |
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1244 increment_mdp_data_at(mdp, non_profiled_offset); |
1206
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1245 jmp(done); |
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1246 bind(found_null); |
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1247 } else { |
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1248 jcc(Assembler::notZero, done); |
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1249 } |
0 | 1250 break; |
1251 } | |
1252 // Since null is rare, make it be the branch-taken case. | |
1253 jcc(Assembler::zero, found_null); | |
1254 | |
1255 // Put all the "Case 3" tests here. | |
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1256 record_item_in_profile_helper(item, mdp, reg2, start_row + 1, done, total_rows, |
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1257 item_offset_fn, item_count_offset_fn, non_profiled_offset); |
0 | 1258 |
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1259 // Found a null. Keep searching for a matching item, |
0 | 1260 // but remember that this is an empty (unused) slot. |
1261 bind(found_null); | |
1262 } | |
1263 } | |
1264 | |
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1265 // In the fall-through case, we found no matching item, but we |
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1266 // observed the item[start_row] is NULL. |
0 | 1267 |
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1268 // Fill in the item field and increment the count. |
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1269 int item_offset = in_bytes(item_offset_fn(start_row)); |
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1270 set_mdp_data_at(mdp, item_offset, item); |
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1271 int count_offset = in_bytes(item_count_offset_fn(start_row)); |
0 | 1272 movl(reg2, DataLayout::counter_increment); |
1273 set_mdp_data_at(mdp, count_offset, reg2); | |
1206
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1274 if (start_row > 0) { |
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1275 jmp(done); |
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1276 } |
0 | 1277 } |
1278 | |
1279 // Example state machine code for three profile rows: | |
1280 // // main copy of decision tree, rooted at row[1] | |
1281 // if (row[0].rec == rec) { row[0].incr(); goto done; } | |
1282 // if (row[0].rec != NULL) { | |
1283 // // inner copy of decision tree, rooted at row[1] | |
1284 // if (row[1].rec == rec) { row[1].incr(); goto done; } | |
1285 // if (row[1].rec != NULL) { | |
1286 // // degenerate decision tree, rooted at row[2] | |
1287 // if (row[2].rec == rec) { row[2].incr(); goto done; } | |
1206
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1288 // if (row[2].rec != NULL) { count.incr(); goto done; } // overflow |
0 | 1289 // row[2].init(rec); goto done; |
1290 // } else { | |
1291 // // remember row[1] is empty | |
1292 // if (row[2].rec == rec) { row[2].incr(); goto done; } | |
1293 // row[1].init(rec); goto done; | |
1294 // } | |
1295 // } else { | |
1296 // // remember row[0] is empty | |
1297 // if (row[1].rec == rec) { row[1].incr(); goto done; } | |
1298 // if (row[2].rec == rec) { row[2].incr(); goto done; } | |
1299 // row[0].init(rec); goto done; | |
1300 // } | |
1206
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1301 // done: |
0 | 1302 |
1303 void InterpreterMacroAssembler::record_klass_in_profile(Register receiver, | |
1206
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1304 Register mdp, Register reg2, |
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1305 bool is_virtual_call) { |
0 | 1306 assert(ProfileInterpreter, "must be profiling"); |
1307 Label done; | |
1308 | |
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1309 record_klass_in_profile_helper(receiver, mdp, reg2, done, is_virtual_call); |
0 | 1310 |
1311 bind (done); | |
1312 } | |
1313 | |
1314 void InterpreterMacroAssembler::profile_ret(Register return_bci, | |
1315 Register mdp) { | |
1316 if (ProfileInterpreter) { | |
1317 Label profile_continue; | |
1318 uint row; | |
1319 | |
1320 // If no method data exists, go to profile_continue. | |
1321 test_method_data_pointer(mdp, profile_continue); | |
1322 | |
1323 // Update the total ret count. | |
1324 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset())); | |
1325 | |
1326 for (row = 0; row < RetData::row_limit(); row++) { | |
1327 Label next_test; | |
1328 | |
1329 // See if return_bci is equal to bci[n]: | |
1330 test_mdp_data_at(mdp, | |
1331 in_bytes(RetData::bci_offset(row)), | |
1332 return_bci, noreg, | |
1333 next_test); | |
1334 | |
1335 // return_bci is equal to bci[n]. Increment the count. | |
1336 increment_mdp_data_at(mdp, in_bytes(RetData::bci_count_offset(row))); | |
1337 | |
1338 // The method data pointer needs to be updated to reflect the new target. | |
1339 update_mdp_by_offset(mdp, | |
1340 in_bytes(RetData::bci_displacement_offset(row))); | |
1341 jmp(profile_continue); | |
1342 bind(next_test); | |
1343 } | |
1344 | |
1345 update_mdp_for_ret(return_bci); | |
1346 | |
1347 bind(profile_continue); | |
1348 } | |
1349 } | |
1350 | |
1351 | |
1352 void InterpreterMacroAssembler::profile_null_seen(Register mdp) { | |
1353 if (ProfileInterpreter) { | |
1354 Label profile_continue; | |
1355 | |
1356 // If no method data exists, go to profile_continue. | |
1357 test_method_data_pointer(mdp, profile_continue); | |
1358 | |
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1359 set_mdp_flag_at(mdp, BitData::null_seen_byte_constant()); |
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1360 |
0 | 1361 // The method data pointer needs to be updated. |
1362 int mdp_delta = in_bytes(BitData::bit_data_size()); | |
1363 if (TypeProfileCasts) { | |
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1364 mdp_delta = in_bytes(ReceiverTypeData::receiver_type_data_size()); |
0 | 1365 } |
1366 update_mdp_by_constant(mdp, mdp_delta); | |
1367 | |
1368 bind(profile_continue); | |
1369 } | |
1370 } | |
1371 | |
1372 | |
1373 void InterpreterMacroAssembler::profile_typecheck_failed(Register mdp) { | |
1374 if (ProfileInterpreter && TypeProfileCasts) { | |
1375 Label profile_continue; | |
1376 | |
1377 // If no method data exists, go to profile_continue. | |
1378 test_method_data_pointer(mdp, profile_continue); | |
1379 | |
1380 int count_offset = in_bytes(CounterData::count_offset()); | |
1381 // Back up the address, since we have already bumped the mdp. | |
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1382 count_offset -= in_bytes(ReceiverTypeData::receiver_type_data_size()); |
0 | 1383 |
1384 // *Decrement* the counter. We expect to see zero or small negatives. | |
1385 increment_mdp_data_at(mdp, count_offset, true); | |
1386 | |
1387 bind (profile_continue); | |
1388 } | |
1389 } | |
1390 | |
1391 | |
1392 void InterpreterMacroAssembler::profile_typecheck(Register mdp, Register klass, Register reg2) { | |
1393 if (ProfileInterpreter) { | |
1394 Label profile_continue; | |
1395 | |
1396 // If no method data exists, go to profile_continue. | |
1397 test_method_data_pointer(mdp, profile_continue); | |
1398 | |
1399 // The method data pointer needs to be updated. | |
1400 int mdp_delta = in_bytes(BitData::bit_data_size()); | |
1401 if (TypeProfileCasts) { | |
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1402 mdp_delta = in_bytes(ReceiverTypeData::receiver_type_data_size()); |
0 | 1403 |
1404 // Record the object type. | |
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1405 record_klass_in_profile(klass, mdp, reg2, false); |
0 | 1406 } |
1407 update_mdp_by_constant(mdp, mdp_delta); | |
1408 | |
1409 bind(profile_continue); | |
1410 } | |
1411 } | |
1412 | |
1413 | |
1414 void InterpreterMacroAssembler::profile_switch_default(Register mdp) { | |
1415 if (ProfileInterpreter) { | |
1416 Label profile_continue; | |
1417 | |
1418 // If no method data exists, go to profile_continue. | |
1419 test_method_data_pointer(mdp, profile_continue); | |
1420 | |
1421 // Update the default case count | |
1422 increment_mdp_data_at(mdp, | |
1423 in_bytes(MultiBranchData::default_count_offset())); | |
1424 | |
1425 // The method data pointer needs to be updated. | |
1426 update_mdp_by_offset(mdp, | |
1427 in_bytes(MultiBranchData:: | |
1428 default_displacement_offset())); | |
1429 | |
1430 bind(profile_continue); | |
1431 } | |
1432 } | |
1433 | |
1434 | |
1435 void InterpreterMacroAssembler::profile_switch_case(Register index, | |
1436 Register mdp, | |
1437 Register reg2) { | |
1438 if (ProfileInterpreter) { | |
1439 Label profile_continue; | |
1440 | |
1441 // If no method data exists, go to profile_continue. | |
1442 test_method_data_pointer(mdp, profile_continue); | |
1443 | |
1444 // Build the base (index * per_case_size_in_bytes()) + | |
1445 // case_array_offset_in_bytes() | |
1446 movl(reg2, in_bytes(MultiBranchData::per_case_size())); | |
304 | 1447 imulptr(index, reg2); // XXX l ? |
1448 addptr(index, in_bytes(MultiBranchData::case_array_offset())); // XXX l ? | |
0 | 1449 |
1450 // Update the case count | |
1451 increment_mdp_data_at(mdp, | |
1452 index, | |
1453 in_bytes(MultiBranchData::relative_count_offset())); | |
1454 | |
1455 // The method data pointer needs to be updated. | |
1456 update_mdp_by_offset(mdp, | |
1457 index, | |
1458 in_bytes(MultiBranchData:: | |
1459 relative_displacement_offset())); | |
1460 | |
1461 bind(profile_continue); | |
1462 } | |
1463 } | |
1464 | |
1465 | |
304 | 1466 |
0 | 1467 void InterpreterMacroAssembler::verify_oop(Register reg, TosState state) { |
1468 if (state == atos) { | |
1469 MacroAssembler::verify_oop(reg); | |
1470 } | |
1471 } | |
1472 | |
1473 void InterpreterMacroAssembler::verify_FPU(int stack_depth, TosState state) { | |
1474 } | |
304 | 1475 #endif // !CC_INTERP |
0 | 1476 |
1477 | |
1478 void InterpreterMacroAssembler::notify_method_entry() { | |
1479 // Whenever JVMTI is interp_only_mode, method entry/exit events are sent to | |
1480 // track stack depth. If it is possible to enter interp_only_mode we add | |
1481 // the code to check if the event should be sent. | |
1482 if (JvmtiExport::can_post_interpreter_events()) { | |
1483 Label L; | |
1484 movl(rdx, Address(r15_thread, JavaThread::interp_only_mode_offset())); | |
1485 testl(rdx, rdx); | |
1486 jcc(Assembler::zero, L); | |
1487 call_VM(noreg, CAST_FROM_FN_PTR(address, | |
1488 InterpreterRuntime::post_method_entry)); | |
1489 bind(L); | |
1490 } | |
1491 | |
1492 { | |
1493 SkipIfEqual skip(this, &DTraceMethodProbes, false); | |
1494 get_method(c_rarg1); | |
1495 call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_entry), | |
1496 r15_thread, c_rarg1); | |
1497 } | |
610
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1498 |
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1499 // RedefineClasses() tracing support for obsolete method entry |
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1500 if (RC_TRACE_IN_RANGE(0x00001000, 0x00002000)) { |
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1501 get_method(c_rarg1); |
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1502 call_VM_leaf( |
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1503 CAST_FROM_FN_PTR(address, SharedRuntime::rc_trace_method_entry), |
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1504 r15_thread, c_rarg1); |
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1505 } |
0 | 1506 } |
1507 | |
1508 | |
1509 void InterpreterMacroAssembler::notify_method_exit( | |
1510 TosState state, NotifyMethodExitMode mode) { | |
1511 // Whenever JVMTI is interp_only_mode, method entry/exit events are sent to | |
1512 // track stack depth. If it is possible to enter interp_only_mode we add | |
1513 // the code to check if the event should be sent. | |
1514 if (mode == NotifyJVMTI && JvmtiExport::can_post_interpreter_events()) { | |
1515 Label L; | |
1516 // Note: frame::interpreter_frame_result has a dependency on how the | |
1517 // method result is saved across the call to post_method_exit. If this | |
1518 // is changed then the interpreter_frame_result implementation will | |
1519 // need to be updated too. | |
304 | 1520 |
1521 // For c++ interpreter the result is always stored at a known location in the frame | |
1522 // template interpreter will leave it on the top of the stack. | |
1523 NOT_CC_INTERP(push(state);) | |
0 | 1524 movl(rdx, Address(r15_thread, JavaThread::interp_only_mode_offset())); |
1525 testl(rdx, rdx); | |
1526 jcc(Assembler::zero, L); | |
1527 call_VM(noreg, | |
1528 CAST_FROM_FN_PTR(address, InterpreterRuntime::post_method_exit)); | |
1529 bind(L); | |
304 | 1530 NOT_CC_INTERP(pop(state)); |
0 | 1531 } |
1532 | |
1533 { | |
1534 SkipIfEqual skip(this, &DTraceMethodProbes, false); | |
304 | 1535 NOT_CC_INTERP(push(state)); |
0 | 1536 get_method(c_rarg1); |
1537 call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_exit), | |
1538 r15_thread, c_rarg1); | |
304 | 1539 NOT_CC_INTERP(pop(state)); |
0 | 1540 } |
1541 } | |
1783 | 1542 |
1543 // Jump if ((*counter_addr += increment) & mask) satisfies the condition. | |
1544 void InterpreterMacroAssembler::increment_mask_and_jump(Address counter_addr, | |
1545 int increment, int mask, | |
1546 Register scratch, bool preloaded, | |
1547 Condition cond, Label* where) { | |
1548 if (!preloaded) { | |
1549 movl(scratch, counter_addr); | |
1550 } | |
1551 incrementl(scratch, increment); | |
1552 movl(counter_addr, scratch); | |
1553 andl(scratch, mask); | |
1554 jcc(cond, *where); | |
1555 } |