Mercurial > hg > graal-compiler
annotate src/cpu/x86/vm/interp_masm_x86_64.cpp @ 8699:65b797426a3b jdk8-b81
Added tag hs25-b22 for changeset dd6350b4abc4
author | amurillo |
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date | Fri, 08 Mar 2013 08:10:01 -0800 |
parents | f34d701e952e |
children | 291ffc492eb6 aeaca88565e6 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 2003, 2012, 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" |
26 #include "interp_masm_x86_64.hpp" | |
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"); | |
195 movl(reg, Address(r13, bcp_offset)); | |
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 // Load object from cpool->resolved_references(index) |
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275 void InterpreterMacroAssembler::load_resolved_reference_at_index( |
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276 Register result, Register index) { |
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277 assert_different_registers(result, index); |
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278 // convert from field index to resolved_references() index and from |
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279 // word index to byte offset. Since this is a java object, it can be compressed |
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280 Register tmp = index; // reuse |
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281 shll(tmp, LogBytesPerHeapOop); |
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282 |
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283 get_constant_pool(result); |
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284 // load pointer for resolved_references[] objArray |
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285 movptr(result, Address(result, ConstantPool::resolved_references_offset_in_bytes())); |
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286 // JNIHandles::resolve(obj); |
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287 movptr(result, Address(result, 0)); |
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288 // Add in the index |
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289 addptr(result, tmp); |
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290 load_heap_oop(result, Address(result, arrayOopDesc::base_offset_in_bytes(T_OBJECT))); |
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291 } |
0 | 292 |
293 // Generate a subtype check: branch to ok_is_subtype if sub_klass is a | |
294 // subtype of super_klass. | |
295 // | |
296 // Args: | |
297 // rax: superklass | |
298 // Rsub_klass: subklass | |
299 // | |
300 // Kills: | |
301 // rcx, rdi | |
302 void InterpreterMacroAssembler::gen_subtype_check(Register Rsub_klass, | |
303 Label& ok_is_subtype) { | |
304 assert(Rsub_klass != rax, "rax holds superklass"); | |
305 assert(Rsub_klass != r14, "r14 holds locals"); | |
306 assert(Rsub_klass != r13, "r13 holds bcp"); | |
307 assert(Rsub_klass != rcx, "rcx holds 2ndary super array length"); | |
308 assert(Rsub_klass != rdi, "rdi holds 2ndary super array scan ptr"); | |
309 | |
310 // Profile the not-null value's klass. | |
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311 profile_typecheck(rcx, Rsub_klass, rdi); // blows rcx, reloads rdi |
0 | 312 |
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313 // Do the check. |
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314 check_klass_subtype(Rsub_klass, rax, rcx, ok_is_subtype); // blows rcx |
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315 |
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316 // Profile the failure of the check. |
0 | 317 profile_typecheck_failed(rcx); // blows rcx |
318 } | |
319 | |
320 | |
304 | 321 |
0 | 322 // Java Expression Stack |
323 | |
324 void InterpreterMacroAssembler::pop_ptr(Register r) { | |
304 | 325 pop(r); |
0 | 326 } |
327 | |
328 void InterpreterMacroAssembler::pop_i(Register r) { | |
304 | 329 // XXX can't use pop currently, upper half non clean |
0 | 330 movl(r, Address(rsp, 0)); |
304 | 331 addptr(rsp, wordSize); |
0 | 332 } |
333 | |
334 void InterpreterMacroAssembler::pop_l(Register r) { | |
335 movq(r, Address(rsp, 0)); | |
1506 | 336 addptr(rsp, 2 * Interpreter::stackElementSize); |
0 | 337 } |
338 | |
339 void InterpreterMacroAssembler::pop_f(XMMRegister r) { | |
340 movflt(r, Address(rsp, 0)); | |
304 | 341 addptr(rsp, wordSize); |
0 | 342 } |
343 | |
344 void InterpreterMacroAssembler::pop_d(XMMRegister r) { | |
345 movdbl(r, Address(rsp, 0)); | |
1506 | 346 addptr(rsp, 2 * Interpreter::stackElementSize); |
0 | 347 } |
348 | |
349 void InterpreterMacroAssembler::push_ptr(Register r) { | |
304 | 350 push(r); |
0 | 351 } |
352 | |
353 void InterpreterMacroAssembler::push_i(Register r) { | |
304 | 354 push(r); |
0 | 355 } |
356 | |
357 void InterpreterMacroAssembler::push_l(Register r) { | |
1506 | 358 subptr(rsp, 2 * wordSize); |
0 | 359 movq(Address(rsp, 0), r); |
360 } | |
361 | |
362 void InterpreterMacroAssembler::push_f(XMMRegister r) { | |
304 | 363 subptr(rsp, wordSize); |
0 | 364 movflt(Address(rsp, 0), r); |
365 } | |
366 | |
367 void InterpreterMacroAssembler::push_d(XMMRegister r) { | |
1506 | 368 subptr(rsp, 2 * wordSize); |
0 | 369 movdbl(Address(rsp, 0), r); |
370 } | |
371 | |
372 void InterpreterMacroAssembler::pop(TosState state) { | |
373 switch (state) { | |
374 case atos: pop_ptr(); break; | |
375 case btos: | |
376 case ctos: | |
377 case stos: | |
378 case itos: pop_i(); break; | |
379 case ltos: pop_l(); break; | |
380 case ftos: pop_f(); break; | |
381 case dtos: pop_d(); break; | |
382 case vtos: /* nothing to do */ break; | |
383 default: ShouldNotReachHere(); | |
384 } | |
385 verify_oop(rax, state); | |
386 } | |
387 | |
388 void InterpreterMacroAssembler::push(TosState state) { | |
389 verify_oop(rax, state); | |
390 switch (state) { | |
391 case atos: push_ptr(); break; | |
392 case btos: | |
393 case ctos: | |
394 case stos: | |
395 case itos: push_i(); break; | |
396 case ltos: push_l(); break; | |
397 case ftos: push_f(); break; | |
398 case dtos: push_d(); break; | |
399 case vtos: /* nothing to do */ break; | |
400 default : ShouldNotReachHere(); | |
401 } | |
402 } | |
403 | |
404 | |
1506 | 405 // Helpers for swap and dup |
406 void InterpreterMacroAssembler::load_ptr(int n, Register val) { | |
304 | 407 movptr(val, Address(rsp, Interpreter::expr_offset_in_bytes(n))); |
0 | 408 } |
409 | |
1506 | 410 void InterpreterMacroAssembler::store_ptr(int n, Register val) { |
411 movptr(Address(rsp, Interpreter::expr_offset_in_bytes(n)), val); | |
0 | 412 } |
413 | |
414 | |
710 | 415 void InterpreterMacroAssembler::prepare_to_jump_from_interpreted() { |
0 | 416 // set sender sp |
304 | 417 lea(r13, Address(rsp, wordSize)); |
0 | 418 // record last_sp |
304 | 419 movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), r13); |
710 | 420 } |
421 | |
422 | |
423 // Jump to from_interpreted entry of a call unless single stepping is possible | |
424 // in this thread in which case we must call the i2i entry | |
425 void InterpreterMacroAssembler::jump_from_interpreted(Register method, Register temp) { | |
426 prepare_to_jump_from_interpreted(); | |
0 | 427 |
428 if (JvmtiExport::can_post_interpreter_events()) { | |
429 Label run_compiled_code; | |
430 // JVMTI events, such as single-stepping, are implemented partly by avoiding running | |
431 // compiled code in threads for which the event is enabled. Check here for | |
432 // interp_only_mode if these events CAN be enabled. | |
433 // interp_only is an int, on little endian it is sufficient to test the byte only | |
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434 // Is a cmpl faster? |
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435 cmpb(Address(r15_thread, JavaThread::interp_only_mode_offset()), 0); |
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436 jccb(Assembler::zero, run_compiled_code); |
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437 jmp(Address(method, Method::interpreter_entry_offset())); |
0 | 438 bind(run_compiled_code); |
439 } | |
440 | |
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441 jmp(Address(method, Method::from_interpreted_offset())); |
0 | 442 |
443 } | |
444 | |
445 | |
446 // The following two routines provide a hook so that an implementation | |
447 // can schedule the dispatch in two parts. amd64 does not do this. | |
448 void InterpreterMacroAssembler::dispatch_prolog(TosState state, int step) { | |
449 // Nothing amd64 specific to be done here | |
450 } | |
451 | |
452 void InterpreterMacroAssembler::dispatch_epilog(TosState state, int step) { | |
453 dispatch_next(state, step); | |
454 } | |
455 | |
456 void InterpreterMacroAssembler::dispatch_base(TosState state, | |
457 address* table, | |
458 bool verifyoop) { | |
459 verify_FPU(1, state); | |
460 if (VerifyActivationFrameSize) { | |
461 Label L; | |
304 | 462 mov(rcx, rbp); |
463 subptr(rcx, rsp); | |
464 int32_t min_frame_size = | |
0 | 465 (frame::link_offset - frame::interpreter_frame_initial_sp_offset) * |
466 wordSize; | |
304 | 467 cmpptr(rcx, (int32_t)min_frame_size); |
0 | 468 jcc(Assembler::greaterEqual, L); |
469 stop("broken stack frame"); | |
470 bind(L); | |
471 } | |
472 if (verifyoop) { | |
473 verify_oop(rax, state); | |
474 } | |
475 lea(rscratch1, ExternalAddress((address)table)); | |
476 jmp(Address(rscratch1, rbx, Address::times_8)); | |
477 } | |
478 | |
479 void InterpreterMacroAssembler::dispatch_only(TosState state) { | |
480 dispatch_base(state, Interpreter::dispatch_table(state)); | |
481 } | |
482 | |
483 void InterpreterMacroAssembler::dispatch_only_normal(TosState state) { | |
484 dispatch_base(state, Interpreter::normal_table(state)); | |
485 } | |
486 | |
487 void InterpreterMacroAssembler::dispatch_only_noverify(TosState state) { | |
488 dispatch_base(state, Interpreter::normal_table(state), false); | |
489 } | |
490 | |
491 | |
492 void InterpreterMacroAssembler::dispatch_next(TosState state, int step) { | |
493 // load next bytecode (load before advancing r13 to prevent AGI) | |
494 load_unsigned_byte(rbx, Address(r13, step)); | |
495 // advance r13 | |
304 | 496 increment(r13, step); |
0 | 497 dispatch_base(state, Interpreter::dispatch_table(state)); |
498 } | |
499 | |
500 void InterpreterMacroAssembler::dispatch_via(TosState state, address* table) { | |
501 // load current bytecode | |
502 load_unsigned_byte(rbx, Address(r13, 0)); | |
503 dispatch_base(state, table); | |
504 } | |
505 | |
506 // remove activation | |
507 // | |
508 // Unlock the receiver if this is a synchronized method. | |
509 // Unlock any Java monitors from syncronized blocks. | |
510 // Remove the activation from the stack. | |
511 // | |
512 // If there are locked Java monitors | |
513 // If throw_monitor_exception | |
514 // throws IllegalMonitorStateException | |
515 // Else if install_monitor_exception | |
516 // installs IllegalMonitorStateException | |
517 // Else | |
518 // no error processing | |
519 void InterpreterMacroAssembler::remove_activation( | |
520 TosState state, | |
521 Register ret_addr, | |
522 bool throw_monitor_exception, | |
523 bool install_monitor_exception, | |
524 bool notify_jvmdi) { | |
525 // Note: Registers rdx xmm0 may be in use for the | |
526 // result check if synchronized method | |
527 Label unlocked, unlock, no_unlock; | |
528 | |
529 // get the value of _do_not_unlock_if_synchronized into rdx | |
530 const Address do_not_unlock_if_synchronized(r15_thread, | |
531 in_bytes(JavaThread::do_not_unlock_if_synchronized_offset())); | |
532 movbool(rdx, do_not_unlock_if_synchronized); | |
533 movbool(do_not_unlock_if_synchronized, false); // reset the flag | |
534 | |
535 // get method access flags | |
304 | 536 movptr(rbx, Address(rbp, frame::interpreter_frame_method_offset * wordSize)); |
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537 movl(rcx, Address(rbx, Method::access_flags_offset())); |
0 | 538 testl(rcx, JVM_ACC_SYNCHRONIZED); |
539 jcc(Assembler::zero, unlocked); | |
540 | |
541 // Don't unlock anything if the _do_not_unlock_if_synchronized flag | |
542 // is set. | |
543 testbool(rdx); | |
544 jcc(Assembler::notZero, no_unlock); | |
545 | |
546 // unlock monitor | |
547 push(state); // save result | |
548 | |
549 // BasicObjectLock will be first in list, since this is a | |
550 // synchronized method. However, need to check that the object has | |
551 // not been unlocked by an explicit monitorexit bytecode. | |
552 const Address monitor(rbp, frame::interpreter_frame_initial_sp_offset * | |
553 wordSize - (int) sizeof(BasicObjectLock)); | |
554 // We use c_rarg1 so that if we go slow path it will be the correct | |
555 // register for unlock_object to pass to VM directly | |
304 | 556 lea(c_rarg1, monitor); // address of first monitor |
0 | 557 |
304 | 558 movptr(rax, Address(c_rarg1, BasicObjectLock::obj_offset_in_bytes())); |
559 testptr(rax, rax); | |
0 | 560 jcc(Assembler::notZero, unlock); |
561 | |
562 pop(state); | |
563 if (throw_monitor_exception) { | |
564 // Entry already unlocked, need to throw exception | |
565 call_VM(noreg, CAST_FROM_FN_PTR(address, | |
566 InterpreterRuntime::throw_illegal_monitor_state_exception)); | |
567 should_not_reach_here(); | |
568 } else { | |
569 // Monitor already unlocked during a stack unroll. If requested, | |
570 // install an illegal_monitor_state_exception. Continue with | |
571 // stack unrolling. | |
572 if (install_monitor_exception) { | |
573 call_VM(noreg, CAST_FROM_FN_PTR(address, | |
574 InterpreterRuntime::new_illegal_monitor_state_exception)); | |
575 } | |
576 jmp(unlocked); | |
577 } | |
578 | |
579 bind(unlock); | |
580 unlock_object(c_rarg1); | |
581 pop(state); | |
582 | |
583 // Check that for block-structured locking (i.e., that all locked | |
584 // objects has been unlocked) | |
585 bind(unlocked); | |
586 | |
587 // rax: Might contain return value | |
588 | |
589 // Check that all monitors are unlocked | |
590 { | |
591 Label loop, exception, entry, restart; | |
592 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize; | |
593 const Address monitor_block_top( | |
594 rbp, frame::interpreter_frame_monitor_block_top_offset * wordSize); | |
595 const Address monitor_block_bot( | |
596 rbp, frame::interpreter_frame_initial_sp_offset * wordSize); | |
597 | |
598 bind(restart); | |
599 // We use c_rarg1 so that if we go slow path it will be the correct | |
600 // register for unlock_object to pass to VM directly | |
304 | 601 movptr(c_rarg1, monitor_block_top); // points to current entry, starting |
0 | 602 // with top-most entry |
304 | 603 lea(rbx, monitor_block_bot); // points to word before bottom of |
0 | 604 // monitor block |
605 jmp(entry); | |
606 | |
607 // Entry already locked, need to throw exception | |
608 bind(exception); | |
609 | |
610 if (throw_monitor_exception) { | |
611 // Throw exception | |
612 MacroAssembler::call_VM(noreg, | |
613 CAST_FROM_FN_PTR(address, InterpreterRuntime:: | |
614 throw_illegal_monitor_state_exception)); | |
615 should_not_reach_here(); | |
616 } else { | |
617 // Stack unrolling. Unlock object and install illegal_monitor_exception. | |
618 // Unlock does not block, so don't have to worry about the frame. | |
619 // We don't have to preserve c_rarg1 since we are going to throw an exception. | |
620 | |
621 push(state); | |
622 unlock_object(c_rarg1); | |
623 pop(state); | |
624 | |
625 if (install_monitor_exception) { | |
626 call_VM(noreg, CAST_FROM_FN_PTR(address, | |
627 InterpreterRuntime:: | |
628 new_illegal_monitor_state_exception)); | |
629 } | |
630 | |
631 jmp(restart); | |
632 } | |
633 | |
634 bind(loop); | |
635 // check if current entry is used | |
304 | 636 cmpptr(Address(c_rarg1, BasicObjectLock::obj_offset_in_bytes()), (int32_t) NULL); |
0 | 637 jcc(Assembler::notEqual, exception); |
638 | |
304 | 639 addptr(c_rarg1, entry_size); // otherwise advance to next entry |
0 | 640 bind(entry); |
304 | 641 cmpptr(c_rarg1, rbx); // check if bottom reached |
0 | 642 jcc(Assembler::notEqual, loop); // if not at bottom then check this entry |
643 } | |
644 | |
645 bind(no_unlock); | |
646 | |
647 // jvmti support | |
648 if (notify_jvmdi) { | |
649 notify_method_exit(state, NotifyJVMTI); // preserve TOSCA | |
650 } else { | |
651 notify_method_exit(state, SkipNotifyJVMTI); // preserve TOSCA | |
652 } | |
653 | |
654 // remove activation | |
655 // get sender sp | |
304 | 656 movptr(rbx, |
657 Address(rbp, frame::interpreter_frame_sender_sp_offset * wordSize)); | |
0 | 658 leave(); // remove frame anchor |
304 | 659 pop(ret_addr); // get return address |
660 mov(rsp, rbx); // set sp to sender sp | |
0 | 661 } |
662 | |
304 | 663 #endif // C_INTERP |
664 | |
0 | 665 // Lock object |
666 // | |
667 // Args: | |
668 // c_rarg1: BasicObjectLock to be used for locking | |
669 // | |
670 // Kills: | |
671 // rax | |
672 // c_rarg0, c_rarg1, c_rarg2, c_rarg3, .. (param regs) | |
673 // rscratch1, rscratch2 (scratch regs) | |
674 void InterpreterMacroAssembler::lock_object(Register lock_reg) { | |
675 assert(lock_reg == c_rarg1, "The argument is only for looks. It must be c_rarg1"); | |
676 | |
677 if (UseHeavyMonitors) { | |
678 call_VM(noreg, | |
679 CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorenter), | |
680 lock_reg); | |
681 } else { | |
682 Label done; | |
683 | |
684 const Register swap_reg = rax; // Must use rax for cmpxchg instruction | |
685 const Register obj_reg = c_rarg3; // Will contain the oop | |
686 | |
687 const int obj_offset = BasicObjectLock::obj_offset_in_bytes(); | |
688 const int lock_offset = BasicObjectLock::lock_offset_in_bytes (); | |
689 const int mark_offset = lock_offset + | |
690 BasicLock::displaced_header_offset_in_bytes(); | |
691 | |
692 Label slow_case; | |
693 | |
694 // Load object pointer into obj_reg %c_rarg3 | |
304 | 695 movptr(obj_reg, Address(lock_reg, obj_offset)); |
0 | 696 |
697 if (UseBiasedLocking) { | |
698 biased_locking_enter(lock_reg, obj_reg, swap_reg, rscratch1, false, done, &slow_case); | |
699 } | |
700 | |
701 // Load immediate 1 into swap_reg %rax | |
702 movl(swap_reg, 1); | |
703 | |
704 // Load (object->mark() | 1) into swap_reg %rax | |
304 | 705 orptr(swap_reg, Address(obj_reg, 0)); |
0 | 706 |
707 // Save (object->mark() | 1) into BasicLock's displaced header | |
304 | 708 movptr(Address(lock_reg, mark_offset), swap_reg); |
0 | 709 |
710 assert(lock_offset == 0, | |
711 "displached header must be first word in BasicObjectLock"); | |
712 | |
713 if (os::is_MP()) lock(); | |
304 | 714 cmpxchgptr(lock_reg, Address(obj_reg, 0)); |
0 | 715 if (PrintBiasedLockingStatistics) { |
716 cond_inc32(Assembler::zero, | |
717 ExternalAddress((address) BiasedLocking::fast_path_entry_count_addr())); | |
718 } | |
719 jcc(Assembler::zero, done); | |
720 | |
721 // Test if the oopMark is an obvious stack pointer, i.e., | |
722 // 1) (mark & 7) == 0, and | |
723 // 2) rsp <= mark < mark + os::pagesize() | |
724 // | |
725 // These 3 tests can be done by evaluating the following | |
726 // expression: ((mark - rsp) & (7 - os::vm_page_size())), | |
727 // assuming both stack pointer and pagesize have their | |
728 // least significant 3 bits clear. | |
729 // NOTE: the oopMark is in swap_reg %rax as the result of cmpxchg | |
304 | 730 subptr(swap_reg, rsp); |
731 andptr(swap_reg, 7 - os::vm_page_size()); | |
0 | 732 |
733 // Save the test result, for recursive case, the result is zero | |
304 | 734 movptr(Address(lock_reg, mark_offset), swap_reg); |
0 | 735 |
736 if (PrintBiasedLockingStatistics) { | |
737 cond_inc32(Assembler::zero, | |
738 ExternalAddress((address) BiasedLocking::fast_path_entry_count_addr())); | |
739 } | |
740 jcc(Assembler::zero, done); | |
741 | |
742 bind(slow_case); | |
743 | |
744 // Call the runtime routine for slow case | |
745 call_VM(noreg, | |
746 CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorenter), | |
747 lock_reg); | |
748 | |
749 bind(done); | |
750 } | |
751 } | |
752 | |
753 | |
754 // Unlocks an object. Used in monitorexit bytecode and | |
755 // remove_activation. Throws an IllegalMonitorException if object is | |
756 // not locked by current thread. | |
757 // | |
758 // Args: | |
759 // c_rarg1: BasicObjectLock for lock | |
760 // | |
761 // Kills: | |
762 // rax | |
763 // c_rarg0, c_rarg1, c_rarg2, c_rarg3, ... (param regs) | |
764 // rscratch1, rscratch2 (scratch regs) | |
765 void InterpreterMacroAssembler::unlock_object(Register lock_reg) { | |
766 assert(lock_reg == c_rarg1, "The argument is only for looks. It must be rarg1"); | |
767 | |
768 if (UseHeavyMonitors) { | |
769 call_VM(noreg, | |
770 CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorexit), | |
771 lock_reg); | |
772 } else { | |
773 Label done; | |
774 | |
775 const Register swap_reg = rax; // Must use rax for cmpxchg instruction | |
776 const Register header_reg = c_rarg2; // Will contain the old oopMark | |
777 const Register obj_reg = c_rarg3; // Will contain the oop | |
778 | |
779 save_bcp(); // Save in case of exception | |
780 | |
781 // Convert from BasicObjectLock structure to object and BasicLock | |
782 // structure Store the BasicLock address into %rax | |
304 | 783 lea(swap_reg, Address(lock_reg, BasicObjectLock::lock_offset_in_bytes())); |
0 | 784 |
785 // Load oop into obj_reg(%c_rarg3) | |
304 | 786 movptr(obj_reg, Address(lock_reg, BasicObjectLock::obj_offset_in_bytes())); |
0 | 787 |
788 // Free entry | |
304 | 789 movptr(Address(lock_reg, BasicObjectLock::obj_offset_in_bytes()), (int32_t)NULL_WORD); |
0 | 790 |
791 if (UseBiasedLocking) { | |
792 biased_locking_exit(obj_reg, header_reg, done); | |
793 } | |
794 | |
795 // Load the old header from BasicLock structure | |
304 | 796 movptr(header_reg, Address(swap_reg, |
797 BasicLock::displaced_header_offset_in_bytes())); | |
0 | 798 |
799 // Test for recursion | |
304 | 800 testptr(header_reg, header_reg); |
0 | 801 |
802 // zero for recursive case | |
803 jcc(Assembler::zero, done); | |
804 | |
805 // Atomic swap back the old header | |
806 if (os::is_MP()) lock(); | |
304 | 807 cmpxchgptr(header_reg, Address(obj_reg, 0)); |
0 | 808 |
809 // zero for recursive case | |
810 jcc(Assembler::zero, done); | |
811 | |
812 // Call the runtime routine for slow case. | |
304 | 813 movptr(Address(lock_reg, BasicObjectLock::obj_offset_in_bytes()), |
0 | 814 obj_reg); // restore obj |
815 call_VM(noreg, | |
816 CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorexit), | |
817 lock_reg); | |
818 | |
819 bind(done); | |
820 | |
821 restore_bcp(); | |
822 } | |
823 } | |
824 | |
304 | 825 #ifndef CC_INTERP |
0 | 826 |
827 void InterpreterMacroAssembler::test_method_data_pointer(Register mdp, | |
828 Label& zero_continue) { | |
829 assert(ProfileInterpreter, "must be profiling interpreter"); | |
304 | 830 movptr(mdp, Address(rbp, frame::interpreter_frame_mdx_offset * wordSize)); |
831 testptr(mdp, mdp); | |
0 | 832 jcc(Assembler::zero, zero_continue); |
833 } | |
834 | |
835 | |
836 // Set the method data pointer for the current bcp. | |
837 void InterpreterMacroAssembler::set_method_data_pointer_for_bcp() { | |
838 assert(ProfileInterpreter, "must be profiling interpreter"); | |
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839 Label set_mdp; |
304 | 840 push(rax); |
841 push(rbx); | |
0 | 842 |
843 get_method(rbx); | |
844 // Test MDO to avoid the call if it is NULL. | |
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845 movptr(rax, Address(rbx, in_bytes(Method::method_data_offset()))); |
304 | 846 testptr(rax, rax); |
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847 jcc(Assembler::zero, set_mdp); |
0 | 848 // rbx: method |
849 // r13: bcp | |
850 call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::bcp_to_di), rbx, r13); | |
851 // rax: mdi | |
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852 // mdo is guaranteed to be non-zero here, we checked for it before the call. |
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853 movptr(rbx, Address(rbx, in_bytes(Method::method_data_offset()))); |
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854 addptr(rbx, in_bytes(MethodData::data_offset())); |
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855 addptr(rax, rbx); |
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856 bind(set_mdp); |
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857 movptr(Address(rbp, frame::interpreter_frame_mdx_offset * wordSize), rax); |
304 | 858 pop(rbx); |
859 pop(rax); | |
0 | 860 } |
861 | |
862 void InterpreterMacroAssembler::verify_method_data_pointer() { | |
863 assert(ProfileInterpreter, "must be profiling interpreter"); | |
864 #ifdef ASSERT | |
865 Label verify_continue; | |
304 | 866 push(rax); |
867 push(rbx); | |
868 push(c_rarg3); | |
869 push(c_rarg2); | |
0 | 870 test_method_data_pointer(c_rarg3, verify_continue); // If mdp is zero, continue |
871 get_method(rbx); | |
872 | |
873 // If the mdp is valid, it will point to a DataLayout header which is | |
874 // consistent with the bcp. The converse is highly probable also. | |
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875 load_unsigned_short(c_rarg2, |
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876 Address(c_rarg3, in_bytes(DataLayout::bci_offset()))); |
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877 addptr(c_rarg2, Address(rbx, Method::const_offset())); |
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878 lea(c_rarg2, Address(c_rarg2, ConstMethod::codes_offset())); |
304 | 879 cmpptr(c_rarg2, r13); |
0 | 880 jcc(Assembler::equal, verify_continue); |
881 // rbx: method | |
882 // r13: bcp | |
883 // c_rarg3: mdp | |
884 call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::verify_mdp), | |
885 rbx, r13, c_rarg3); | |
886 bind(verify_continue); | |
304 | 887 pop(c_rarg2); |
888 pop(c_rarg3); | |
889 pop(rbx); | |
890 pop(rax); | |
0 | 891 #endif // ASSERT |
892 } | |
893 | |
894 | |
895 void InterpreterMacroAssembler::set_mdp_data_at(Register mdp_in, | |
896 int constant, | |
897 Register value) { | |
898 assert(ProfileInterpreter, "must be profiling interpreter"); | |
899 Address data(mdp_in, constant); | |
304 | 900 movptr(data, value); |
0 | 901 } |
902 | |
903 | |
904 void InterpreterMacroAssembler::increment_mdp_data_at(Register mdp_in, | |
905 int constant, | |
906 bool decrement) { | |
907 // Counter address | |
908 Address data(mdp_in, constant); | |
909 | |
910 increment_mdp_data_at(data, decrement); | |
911 } | |
912 | |
913 void InterpreterMacroAssembler::increment_mdp_data_at(Address data, | |
914 bool decrement) { | |
915 assert(ProfileInterpreter, "must be profiling interpreter"); | |
304 | 916 // %%% this does 64bit counters at best it is wasting space |
917 // at worst it is a rare bug when counters overflow | |
0 | 918 |
919 if (decrement) { | |
920 // Decrement the register. Set condition codes. | |
304 | 921 addptr(data, (int32_t) -DataLayout::counter_increment); |
0 | 922 // If the decrement causes the counter to overflow, stay negative |
923 Label L; | |
924 jcc(Assembler::negative, L); | |
304 | 925 addptr(data, (int32_t) DataLayout::counter_increment); |
0 | 926 bind(L); |
927 } else { | |
928 assert(DataLayout::counter_increment == 1, | |
929 "flow-free idiom only works with 1"); | |
930 // Increment the register. Set carry flag. | |
304 | 931 addptr(data, DataLayout::counter_increment); |
0 | 932 // If the increment causes the counter to overflow, pull back by 1. |
304 | 933 sbbptr(data, (int32_t)0); |
0 | 934 } |
935 } | |
936 | |
937 | |
938 void InterpreterMacroAssembler::increment_mdp_data_at(Register mdp_in, | |
939 Register reg, | |
940 int constant, | |
941 bool decrement) { | |
942 Address data(mdp_in, reg, Address::times_1, constant); | |
943 | |
944 increment_mdp_data_at(data, decrement); | |
945 } | |
946 | |
947 void InterpreterMacroAssembler::set_mdp_flag_at(Register mdp_in, | |
948 int flag_byte_constant) { | |
949 assert(ProfileInterpreter, "must be profiling interpreter"); | |
950 int header_offset = in_bytes(DataLayout::header_offset()); | |
951 int header_bits = DataLayout::flag_mask_to_header_mask(flag_byte_constant); | |
952 // Set the flag | |
953 orl(Address(mdp_in, header_offset), header_bits); | |
954 } | |
955 | |
956 | |
957 | |
958 void InterpreterMacroAssembler::test_mdp_data_at(Register mdp_in, | |
959 int offset, | |
960 Register value, | |
961 Register test_value_out, | |
962 Label& not_equal_continue) { | |
963 assert(ProfileInterpreter, "must be profiling interpreter"); | |
964 if (test_value_out == noreg) { | |
304 | 965 cmpptr(value, Address(mdp_in, offset)); |
0 | 966 } else { |
967 // Put the test value into a register, so caller can use it: | |
304 | 968 movptr(test_value_out, Address(mdp_in, offset)); |
969 cmpptr(test_value_out, value); | |
0 | 970 } |
971 jcc(Assembler::notEqual, not_equal_continue); | |
972 } | |
973 | |
974 | |
975 void InterpreterMacroAssembler::update_mdp_by_offset(Register mdp_in, | |
976 int offset_of_disp) { | |
977 assert(ProfileInterpreter, "must be profiling interpreter"); | |
978 Address disp_address(mdp_in, offset_of_disp); | |
304 | 979 addptr(mdp_in, disp_address); |
980 movptr(Address(rbp, frame::interpreter_frame_mdx_offset * wordSize), mdp_in); | |
0 | 981 } |
982 | |
983 | |
984 void InterpreterMacroAssembler::update_mdp_by_offset(Register mdp_in, | |
985 Register reg, | |
986 int offset_of_disp) { | |
987 assert(ProfileInterpreter, "must be profiling interpreter"); | |
988 Address disp_address(mdp_in, reg, Address::times_1, offset_of_disp); | |
304 | 989 addptr(mdp_in, disp_address); |
990 movptr(Address(rbp, frame::interpreter_frame_mdx_offset * wordSize), mdp_in); | |
0 | 991 } |
992 | |
993 | |
994 void InterpreterMacroAssembler::update_mdp_by_constant(Register mdp_in, | |
995 int constant) { | |
996 assert(ProfileInterpreter, "must be profiling interpreter"); | |
304 | 997 addptr(mdp_in, constant); |
998 movptr(Address(rbp, frame::interpreter_frame_mdx_offset * wordSize), mdp_in); | |
0 | 999 } |
1000 | |
1001 | |
1002 void InterpreterMacroAssembler::update_mdp_for_ret(Register return_bci) { | |
1003 assert(ProfileInterpreter, "must be profiling interpreter"); | |
304 | 1004 push(return_bci); // save/restore across call_VM |
0 | 1005 call_VM(noreg, |
1006 CAST_FROM_FN_PTR(address, InterpreterRuntime::update_mdp_for_ret), | |
1007 return_bci); | |
304 | 1008 pop(return_bci); |
0 | 1009 } |
1010 | |
1011 | |
1012 void InterpreterMacroAssembler::profile_taken_branch(Register mdp, | |
1013 Register bumped_count) { | |
1014 if (ProfileInterpreter) { | |
1015 Label profile_continue; | |
1016 | |
1017 // If no method data exists, go to profile_continue. | |
1018 // Otherwise, assign to mdp | |
1019 test_method_data_pointer(mdp, profile_continue); | |
1020 | |
1021 // We are taking a branch. Increment the taken count. | |
1022 // We inline increment_mdp_data_at to return bumped_count in a register | |
1023 //increment_mdp_data_at(mdp, in_bytes(JumpData::taken_offset())); | |
1024 Address data(mdp, in_bytes(JumpData::taken_offset())); | |
304 | 1025 movptr(bumped_count, data); |
0 | 1026 assert(DataLayout::counter_increment == 1, |
1027 "flow-free idiom only works with 1"); | |
304 | 1028 addptr(bumped_count, DataLayout::counter_increment); |
1029 sbbptr(bumped_count, 0); | |
1030 movptr(data, bumped_count); // Store back out | |
0 | 1031 |
1032 // The method data pointer needs to be updated to reflect the new target. | |
1033 update_mdp_by_offset(mdp, in_bytes(JumpData::displacement_offset())); | |
1034 bind(profile_continue); | |
1035 } | |
1036 } | |
1037 | |
1038 | |
1039 void InterpreterMacroAssembler::profile_not_taken_branch(Register mdp) { | |
1040 if (ProfileInterpreter) { | |
1041 Label profile_continue; | |
1042 | |
1043 // If no method data exists, go to profile_continue. | |
1044 test_method_data_pointer(mdp, profile_continue); | |
1045 | |
1046 // We are taking a branch. Increment the not taken count. | |
1047 increment_mdp_data_at(mdp, in_bytes(BranchData::not_taken_offset())); | |
1048 | |
1049 // The method data pointer needs to be updated to correspond to | |
1050 // the next bytecode | |
1051 update_mdp_by_constant(mdp, in_bytes(BranchData::branch_data_size())); | |
1052 bind(profile_continue); | |
1053 } | |
1054 } | |
1055 | |
1056 | |
1057 void InterpreterMacroAssembler::profile_call(Register mdp) { | |
1058 if (ProfileInterpreter) { | |
1059 Label profile_continue; | |
1060 | |
1061 // If no method data exists, go to profile_continue. | |
1062 test_method_data_pointer(mdp, profile_continue); | |
1063 | |
1064 // We are making a call. Increment the count. | |
1065 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset())); | |
1066 | |
1067 // The method data pointer needs to be updated to reflect the new target. | |
1068 update_mdp_by_constant(mdp, in_bytes(CounterData::counter_data_size())); | |
1069 bind(profile_continue); | |
1070 } | |
1071 } | |
1072 | |
1073 | |
1074 void InterpreterMacroAssembler::profile_final_call(Register mdp) { | |
1075 if (ProfileInterpreter) { | |
1076 Label profile_continue; | |
1077 | |
1078 // If no method data exists, go to profile_continue. | |
1079 test_method_data_pointer(mdp, profile_continue); | |
1080 | |
1081 // We are making a call. Increment the count. | |
1082 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset())); | |
1083 | |
1084 // The method data pointer needs to be updated to reflect the new target. | |
1085 update_mdp_by_constant(mdp, | |
1086 in_bytes(VirtualCallData:: | |
1087 virtual_call_data_size())); | |
1088 bind(profile_continue); | |
1089 } | |
1090 } | |
1091 | |
1092 | |
1093 void InterpreterMacroAssembler::profile_virtual_call(Register receiver, | |
1094 Register mdp, | |
1108 | 1095 Register reg2, |
1096 bool receiver_can_be_null) { | |
0 | 1097 if (ProfileInterpreter) { |
1098 Label profile_continue; | |
1099 | |
1100 // If no method data exists, go to profile_continue. | |
1101 test_method_data_pointer(mdp, profile_continue); | |
1102 | |
1108 | 1103 Label skip_receiver_profile; |
1104 if (receiver_can_be_null) { | |
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1105 Label not_null; |
1108 | 1106 testptr(receiver, receiver); |
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1107 jccb(Assembler::notZero, not_null); |
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1108 // We are making a call. Increment the count for null receiver. |
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1109 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset())); |
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1110 jmp(skip_receiver_profile); |
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1111 bind(not_null); |
1108 | 1112 } |
1113 | |
0 | 1114 // Record the receiver type. |
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1115 record_klass_in_profile(receiver, mdp, reg2, true); |
1108 | 1116 bind(skip_receiver_profile); |
0 | 1117 |
1118 // The method data pointer needs to be updated to reflect the new target. | |
1119 update_mdp_by_constant(mdp, | |
1120 in_bytes(VirtualCallData:: | |
1121 virtual_call_data_size())); | |
1122 bind(profile_continue); | |
1123 } | |
1124 } | |
1125 | |
1126 // This routine creates a state machine for updating the multi-row | |
1127 // type profile at a virtual call site (or other type-sensitive bytecode). | |
1128 // The machine visits each row (of receiver/count) until the receiver type | |
1129 // is found, or until it runs out of rows. At the same time, it remembers | |
1130 // the location of the first empty row. (An empty row records null for its | |
1131 // receiver, and can be allocated for a newly-observed receiver type.) | |
1132 // Because there are two degrees of freedom in the state, a simple linear | |
1133 // search will not work; it must be a decision tree. Hence this helper | |
1134 // function is recursive, to generate the required tree structured code. | |
1135 // It's the interpreter, so we are trading off code space for speed. | |
1136 // See below for example code. | |
1137 void InterpreterMacroAssembler::record_klass_in_profile_helper( | |
1138 Register receiver, Register mdp, | |
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1139 Register reg2, int start_row, |
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1140 Label& done, bool is_virtual_call) { |
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1141 if (TypeProfileWidth == 0) { |
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1142 if (is_virtual_call) { |
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1143 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset())); |
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1144 } |
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1145 return; |
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1146 } |
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1147 |
0 | 1148 int last_row = VirtualCallData::row_limit() - 1; |
1149 assert(start_row <= last_row, "must be work left to do"); | |
1150 // Test this row for both the receiver and for null. | |
1151 // Take any of three different outcomes: | |
1152 // 1. found receiver => increment count and goto done | |
1153 // 2. found null => keep looking for case 1, maybe allocate this cell | |
1154 // 3. found something else => keep looking for cases 1 and 2 | |
1155 // Case 3 is handled by a recursive call. | |
1156 for (int row = start_row; row <= last_row; row++) { | |
1157 Label next_test; | |
1158 bool test_for_null_also = (row == start_row); | |
1159 | |
1160 // See if the receiver is receiver[n]. | |
1161 int recvr_offset = in_bytes(VirtualCallData::receiver_offset(row)); | |
1162 test_mdp_data_at(mdp, recvr_offset, receiver, | |
1163 (test_for_null_also ? reg2 : noreg), | |
1164 next_test); | |
1165 // (Reg2 now contains the receiver from the CallData.) | |
1166 | |
1167 // The receiver is receiver[n]. Increment count[n]. | |
1168 int count_offset = in_bytes(VirtualCallData::receiver_count_offset(row)); | |
1169 increment_mdp_data_at(mdp, count_offset); | |
1170 jmp(done); | |
1171 bind(next_test); | |
1172 | |
1173 if (test_for_null_also) { | |
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1174 Label found_null; |
0 | 1175 // Failed the equality check on receiver[n]... Test for null. |
304 | 1176 testptr(reg2, reg2); |
0 | 1177 if (start_row == last_row) { |
1178 // The only thing left to do is handle the null case. | |
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1179 if (is_virtual_call) { |
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1180 jccb(Assembler::zero, found_null); |
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1181 // Receiver did not match any saved receiver and there is no empty row for it. |
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1182 // Increment total counter to indicate polymorphic case. |
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1183 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset())); |
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1184 jmp(done); |
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1185 bind(found_null); |
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1186 } else { |
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1187 jcc(Assembler::notZero, done); |
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1188 } |
0 | 1189 break; |
1190 } | |
1191 // Since null is rare, make it be the branch-taken case. | |
1192 jcc(Assembler::zero, found_null); | |
1193 | |
1194 // Put all the "Case 3" tests here. | |
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1195 record_klass_in_profile_helper(receiver, mdp, reg2, start_row + 1, done, is_virtual_call); |
0 | 1196 |
1197 // Found a null. Keep searching for a matching receiver, | |
1198 // but remember that this is an empty (unused) slot. | |
1199 bind(found_null); | |
1200 } | |
1201 } | |
1202 | |
1203 // In the fall-through case, we found no matching receiver, but we | |
1204 // observed the receiver[start_row] is NULL. | |
1205 | |
1206 // Fill in the receiver field and increment the count. | |
1207 int recvr_offset = in_bytes(VirtualCallData::receiver_offset(start_row)); | |
1208 set_mdp_data_at(mdp, recvr_offset, receiver); | |
1209 int count_offset = in_bytes(VirtualCallData::receiver_count_offset(start_row)); | |
1210 movl(reg2, DataLayout::counter_increment); | |
1211 set_mdp_data_at(mdp, count_offset, reg2); | |
1206
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1212 if (start_row > 0) { |
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1213 jmp(done); |
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1214 } |
0 | 1215 } |
1216 | |
1217 // Example state machine code for three profile rows: | |
1218 // // main copy of decision tree, rooted at row[1] | |
1219 // if (row[0].rec == rec) { row[0].incr(); goto done; } | |
1220 // if (row[0].rec != NULL) { | |
1221 // // inner copy of decision tree, rooted at row[1] | |
1222 // if (row[1].rec == rec) { row[1].incr(); goto done; } | |
1223 // if (row[1].rec != NULL) { | |
1224 // // degenerate decision tree, rooted at row[2] | |
1225 // if (row[2].rec == rec) { row[2].incr(); goto done; } | |
1206
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1226 // if (row[2].rec != NULL) { count.incr(); goto done; } // overflow |
0 | 1227 // row[2].init(rec); goto done; |
1228 // } else { | |
1229 // // remember row[1] is empty | |
1230 // if (row[2].rec == rec) { row[2].incr(); goto done; } | |
1231 // row[1].init(rec); goto done; | |
1232 // } | |
1233 // } else { | |
1234 // // remember row[0] is empty | |
1235 // if (row[1].rec == rec) { row[1].incr(); goto done; } | |
1236 // if (row[2].rec == rec) { row[2].incr(); goto done; } | |
1237 // row[0].init(rec); goto done; | |
1238 // } | |
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1239 // done: |
0 | 1240 |
1241 void InterpreterMacroAssembler::record_klass_in_profile(Register receiver, | |
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1242 Register mdp, Register reg2, |
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1243 bool is_virtual_call) { |
0 | 1244 assert(ProfileInterpreter, "must be profiling"); |
1245 Label done; | |
1246 | |
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1247 record_klass_in_profile_helper(receiver, mdp, reg2, 0, done, is_virtual_call); |
0 | 1248 |
1249 bind (done); | |
1250 } | |
1251 | |
1252 void InterpreterMacroAssembler::profile_ret(Register return_bci, | |
1253 Register mdp) { | |
1254 if (ProfileInterpreter) { | |
1255 Label profile_continue; | |
1256 uint row; | |
1257 | |
1258 // If no method data exists, go to profile_continue. | |
1259 test_method_data_pointer(mdp, profile_continue); | |
1260 | |
1261 // Update the total ret count. | |
1262 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset())); | |
1263 | |
1264 for (row = 0; row < RetData::row_limit(); row++) { | |
1265 Label next_test; | |
1266 | |
1267 // See if return_bci is equal to bci[n]: | |
1268 test_mdp_data_at(mdp, | |
1269 in_bytes(RetData::bci_offset(row)), | |
1270 return_bci, noreg, | |
1271 next_test); | |
1272 | |
1273 // return_bci is equal to bci[n]. Increment the count. | |
1274 increment_mdp_data_at(mdp, in_bytes(RetData::bci_count_offset(row))); | |
1275 | |
1276 // The method data pointer needs to be updated to reflect the new target. | |
1277 update_mdp_by_offset(mdp, | |
1278 in_bytes(RetData::bci_displacement_offset(row))); | |
1279 jmp(profile_continue); | |
1280 bind(next_test); | |
1281 } | |
1282 | |
1283 update_mdp_for_ret(return_bci); | |
1284 | |
1285 bind(profile_continue); | |
1286 } | |
1287 } | |
1288 | |
1289 | |
1290 void InterpreterMacroAssembler::profile_null_seen(Register mdp) { | |
1291 if (ProfileInterpreter) { | |
1292 Label profile_continue; | |
1293 | |
1294 // If no method data exists, go to profile_continue. | |
1295 test_method_data_pointer(mdp, profile_continue); | |
1296 | |
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1297 set_mdp_flag_at(mdp, BitData::null_seen_byte_constant()); |
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1298 |
0 | 1299 // The method data pointer needs to be updated. |
1300 int mdp_delta = in_bytes(BitData::bit_data_size()); | |
1301 if (TypeProfileCasts) { | |
1302 mdp_delta = in_bytes(VirtualCallData::virtual_call_data_size()); | |
1303 } | |
1304 update_mdp_by_constant(mdp, mdp_delta); | |
1305 | |
1306 bind(profile_continue); | |
1307 } | |
1308 } | |
1309 | |
1310 | |
1311 void InterpreterMacroAssembler::profile_typecheck_failed(Register mdp) { | |
1312 if (ProfileInterpreter && TypeProfileCasts) { | |
1313 Label profile_continue; | |
1314 | |
1315 // If no method data exists, go to profile_continue. | |
1316 test_method_data_pointer(mdp, profile_continue); | |
1317 | |
1318 int count_offset = in_bytes(CounterData::count_offset()); | |
1319 // Back up the address, since we have already bumped the mdp. | |
1320 count_offset -= in_bytes(VirtualCallData::virtual_call_data_size()); | |
1321 | |
1322 // *Decrement* the counter. We expect to see zero or small negatives. | |
1323 increment_mdp_data_at(mdp, count_offset, true); | |
1324 | |
1325 bind (profile_continue); | |
1326 } | |
1327 } | |
1328 | |
1329 | |
1330 void InterpreterMacroAssembler::profile_typecheck(Register mdp, Register klass, Register reg2) { | |
1331 if (ProfileInterpreter) { | |
1332 Label profile_continue; | |
1333 | |
1334 // If no method data exists, go to profile_continue. | |
1335 test_method_data_pointer(mdp, profile_continue); | |
1336 | |
1337 // The method data pointer needs to be updated. | |
1338 int mdp_delta = in_bytes(BitData::bit_data_size()); | |
1339 if (TypeProfileCasts) { | |
1340 mdp_delta = in_bytes(VirtualCallData::virtual_call_data_size()); | |
1341 | |
1342 // Record the object type. | |
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1343 record_klass_in_profile(klass, mdp, reg2, false); |
0 | 1344 } |
1345 update_mdp_by_constant(mdp, mdp_delta); | |
1346 | |
1347 bind(profile_continue); | |
1348 } | |
1349 } | |
1350 | |
1351 | |
1352 void InterpreterMacroAssembler::profile_switch_default(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 | |
1359 // Update the default case count | |
1360 increment_mdp_data_at(mdp, | |
1361 in_bytes(MultiBranchData::default_count_offset())); | |
1362 | |
1363 // The method data pointer needs to be updated. | |
1364 update_mdp_by_offset(mdp, | |
1365 in_bytes(MultiBranchData:: | |
1366 default_displacement_offset())); | |
1367 | |
1368 bind(profile_continue); | |
1369 } | |
1370 } | |
1371 | |
1372 | |
1373 void InterpreterMacroAssembler::profile_switch_case(Register index, | |
1374 Register mdp, | |
1375 Register reg2) { | |
1376 if (ProfileInterpreter) { | |
1377 Label profile_continue; | |
1378 | |
1379 // If no method data exists, go to profile_continue. | |
1380 test_method_data_pointer(mdp, profile_continue); | |
1381 | |
1382 // Build the base (index * per_case_size_in_bytes()) + | |
1383 // case_array_offset_in_bytes() | |
1384 movl(reg2, in_bytes(MultiBranchData::per_case_size())); | |
304 | 1385 imulptr(index, reg2); // XXX l ? |
1386 addptr(index, in_bytes(MultiBranchData::case_array_offset())); // XXX l ? | |
0 | 1387 |
1388 // Update the case count | |
1389 increment_mdp_data_at(mdp, | |
1390 index, | |
1391 in_bytes(MultiBranchData::relative_count_offset())); | |
1392 | |
1393 // The method data pointer needs to be updated. | |
1394 update_mdp_by_offset(mdp, | |
1395 index, | |
1396 in_bytes(MultiBranchData:: | |
1397 relative_displacement_offset())); | |
1398 | |
1399 bind(profile_continue); | |
1400 } | |
1401 } | |
1402 | |
1403 | |
304 | 1404 |
0 | 1405 void InterpreterMacroAssembler::verify_oop(Register reg, TosState state) { |
1406 if (state == atos) { | |
1407 MacroAssembler::verify_oop(reg); | |
1408 } | |
1409 } | |
1410 | |
1411 void InterpreterMacroAssembler::verify_FPU(int stack_depth, TosState state) { | |
1412 } | |
304 | 1413 #endif // !CC_INTERP |
0 | 1414 |
1415 | |
1416 void InterpreterMacroAssembler::notify_method_entry() { | |
1417 // Whenever JVMTI is interp_only_mode, method entry/exit events are sent to | |
1418 // track stack depth. If it is possible to enter interp_only_mode we add | |
1419 // the code to check if the event should be sent. | |
1420 if (JvmtiExport::can_post_interpreter_events()) { | |
1421 Label L; | |
1422 movl(rdx, Address(r15_thread, JavaThread::interp_only_mode_offset())); | |
1423 testl(rdx, rdx); | |
1424 jcc(Assembler::zero, L); | |
1425 call_VM(noreg, CAST_FROM_FN_PTR(address, | |
1426 InterpreterRuntime::post_method_entry)); | |
1427 bind(L); | |
1428 } | |
1429 | |
1430 { | |
1431 SkipIfEqual skip(this, &DTraceMethodProbes, false); | |
1432 get_method(c_rarg1); | |
1433 call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_entry), | |
1434 r15_thread, c_rarg1); | |
1435 } | |
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1436 |
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1437 // RedefineClasses() tracing support for obsolete method entry |
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1438 if (RC_TRACE_IN_RANGE(0x00001000, 0x00002000)) { |
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1439 get_method(c_rarg1); |
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1440 call_VM_leaf( |
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1441 CAST_FROM_FN_PTR(address, SharedRuntime::rc_trace_method_entry), |
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1442 r15_thread, c_rarg1); |
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1443 } |
0 | 1444 } |
1445 | |
1446 | |
1447 void InterpreterMacroAssembler::notify_method_exit( | |
1448 TosState state, NotifyMethodExitMode mode) { | |
1449 // Whenever JVMTI is interp_only_mode, method entry/exit events are sent to | |
1450 // track stack depth. If it is possible to enter interp_only_mode we add | |
1451 // the code to check if the event should be sent. | |
1452 if (mode == NotifyJVMTI && JvmtiExport::can_post_interpreter_events()) { | |
1453 Label L; | |
1454 // Note: frame::interpreter_frame_result has a dependency on how the | |
1455 // method result is saved across the call to post_method_exit. If this | |
1456 // is changed then the interpreter_frame_result implementation will | |
1457 // need to be updated too. | |
304 | 1458 |
1459 // For c++ interpreter the result is always stored at a known location in the frame | |
1460 // template interpreter will leave it on the top of the stack. | |
1461 NOT_CC_INTERP(push(state);) | |
0 | 1462 movl(rdx, Address(r15_thread, JavaThread::interp_only_mode_offset())); |
1463 testl(rdx, rdx); | |
1464 jcc(Assembler::zero, L); | |
1465 call_VM(noreg, | |
1466 CAST_FROM_FN_PTR(address, InterpreterRuntime::post_method_exit)); | |
1467 bind(L); | |
304 | 1468 NOT_CC_INTERP(pop(state)); |
0 | 1469 } |
1470 | |
1471 { | |
1472 SkipIfEqual skip(this, &DTraceMethodProbes, false); | |
304 | 1473 NOT_CC_INTERP(push(state)); |
0 | 1474 get_method(c_rarg1); |
1475 call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_exit), | |
1476 r15_thread, c_rarg1); | |
304 | 1477 NOT_CC_INTERP(pop(state)); |
0 | 1478 } |
1479 } | |
1783 | 1480 |
1481 // Jump if ((*counter_addr += increment) & mask) satisfies the condition. | |
1482 void InterpreterMacroAssembler::increment_mask_and_jump(Address counter_addr, | |
1483 int increment, int mask, | |
1484 Register scratch, bool preloaded, | |
1485 Condition cond, Label* where) { | |
1486 if (!preloaded) { | |
1487 movl(scratch, counter_addr); | |
1488 } | |
1489 incrementl(scratch, increment); | |
1490 movl(counter_addr, scratch); | |
1491 andl(scratch, mask); | |
1492 jcc(cond, *where); | |
1493 } |