Mercurial > hg > truffle
annotate src/cpu/ppc/vm/templateInterpreter_ppc.cpp @ 20804:7848fc12602b
Merge with jdk8u40-b25
| author | Gilles Duboscq <gilles.m.duboscq@oracle.com> |
|---|---|
| date | Tue, 07 Apr 2015 14:58:49 +0200 |
| parents | 5214669b01f2 c5e86c5cd22e |
| children |
| rev | line source |
|---|---|
| 14694 | 1 /* |
| 2 * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved. | |
| 3 * Copyright 2013, 2014 SAP AG. All rights reserved. | |
| 4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
| 5 * | |
| 6 * This code is free software; you can redistribute it and/or modify it | |
| 7 * under the terms of the GNU General Public License version 2 only, as | |
| 8 * published by the Free Software Foundation. | |
| 9 * | |
| 10 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 13 * version 2 for more details (a copy is included in the LICENSE file that | |
| 14 * accompanied this code). | |
| 15 * | |
| 16 * You should have received a copy of the GNU General Public License version | |
| 17 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 19 * | |
| 20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | |
| 21 * or visit www.oracle.com if you need additional information or have any | |
| 22 * questions. | |
| 23 * | |
| 24 */ | |
| 25 | |
| 26 #include "precompiled.hpp" | |
| 27 #ifndef CC_INTERP | |
| 28 #include "asm/macroAssembler.inline.hpp" | |
| 29 #include "interpreter/bytecodeHistogram.hpp" | |
| 30 #include "interpreter/interpreter.hpp" | |
| 31 #include "interpreter/interpreterGenerator.hpp" | |
| 32 #include "interpreter/interpreterRuntime.hpp" | |
| 33 #include "interpreter/templateTable.hpp" | |
| 34 #include "oops/arrayOop.hpp" | |
| 35 #include "oops/methodData.hpp" | |
| 36 #include "oops/method.hpp" | |
| 37 #include "oops/oop.inline.hpp" | |
| 38 #include "prims/jvmtiExport.hpp" | |
| 39 #include "prims/jvmtiThreadState.hpp" | |
| 40 #include "runtime/arguments.hpp" | |
| 41 #include "runtime/deoptimization.hpp" | |
| 42 #include "runtime/frame.inline.hpp" | |
| 43 #include "runtime/sharedRuntime.hpp" | |
| 44 #include "runtime/stubRoutines.hpp" | |
| 45 #include "runtime/synchronizer.hpp" | |
| 46 #include "runtime/timer.hpp" | |
| 47 #include "runtime/vframeArray.hpp" | |
| 48 #include "utilities/debug.hpp" | |
| 49 #include "utilities/macros.hpp" | |
| 50 | |
| 51 #undef __ | |
| 52 #define __ _masm-> | |
| 53 | |
| 54 #ifdef PRODUCT | |
| 55 #define BLOCK_COMMENT(str) /* nothing */ | |
| 56 #else | |
| 57 #define BLOCK_COMMENT(str) __ block_comment(str) | |
| 58 #endif | |
| 59 | |
| 60 #define BIND(label) bind(label); BLOCK_COMMENT(#label ":") | |
| 61 | |
| 62 //----------------------------------------------------------------------------- | |
| 63 | |
| 64 // Actually we should never reach here since we do stack overflow checks before pushing any frame. | |
| 65 address TemplateInterpreterGenerator::generate_StackOverflowError_handler() { | |
| 66 address entry = __ pc(); | |
| 67 __ unimplemented("generate_StackOverflowError_handler"); | |
| 68 return entry; | |
| 69 } | |
| 70 | |
| 71 address TemplateInterpreterGenerator::generate_ArrayIndexOutOfBounds_handler(const char* name) { | |
| 72 address entry = __ pc(); | |
| 73 __ empty_expression_stack(); | |
| 74 __ load_const_optimized(R4_ARG2, (address) name); | |
| 75 // Index is in R17_tos. | |
| 76 __ mr(R5_ARG3, R17_tos); | |
| 77 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_ArrayIndexOutOfBoundsException)); | |
| 78 return entry; | |
| 79 } | |
| 80 | |
| 81 #if 0 | |
| 82 // Call special ClassCastException constructor taking object to cast | |
| 83 // and target class as arguments. | |
| 17917 | 84 address TemplateInterpreterGenerator::generate_ClassCastException_verbose_handler() { |
| 14694 | 85 address entry = __ pc(); |
| 86 | |
| 87 // Expression stack must be empty before entering the VM if an | |
| 88 // exception happened. | |
| 89 __ empty_expression_stack(); | |
| 17917 | 90 |
| 14694 | 91 // Thread will be loaded to R3_ARG1. |
| 17917 | 92 // Target class oop is in register R5_ARG3 by convention! |
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93 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_ClassCastException_verbose), R17_tos, R5_ARG3); |
| 14694 | 94 // Above call must not return here since exception pending. |
| 17917 | 95 DEBUG_ONLY(__ should_not_reach_here();) |
| 14694 | 96 return entry; |
| 97 } | |
| 98 #endif | |
| 99 | |
| 100 address TemplateInterpreterGenerator::generate_ClassCastException_handler() { | |
| 101 address entry = __ pc(); | |
| 102 // Expression stack must be empty before entering the VM if an | |
| 103 // exception happened. | |
| 104 __ empty_expression_stack(); | |
| 105 | |
| 106 // Load exception object. | |
| 107 // Thread will be loaded to R3_ARG1. | |
| 108 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_ClassCastException), R17_tos); | |
| 109 #ifdef ASSERT | |
| 110 // Above call must not return here since exception pending. | |
| 111 __ should_not_reach_here(); | |
| 112 #endif | |
| 113 return entry; | |
| 114 } | |
| 115 | |
| 116 address TemplateInterpreterGenerator::generate_exception_handler_common(const char* name, const char* message, bool pass_oop) { | |
| 117 address entry = __ pc(); | |
| 118 //__ untested("generate_exception_handler_common"); | |
| 119 Register Rexception = R17_tos; | |
| 120 | |
| 121 // Expression stack must be empty before entering the VM if an exception happened. | |
| 122 __ empty_expression_stack(); | |
| 123 | |
| 124 __ load_const_optimized(R4_ARG2, (address) name, R11_scratch1); | |
| 125 if (pass_oop) { | |
| 126 __ mr(R5_ARG3, Rexception); | |
| 127 __ call_VM(Rexception, CAST_FROM_FN_PTR(address, InterpreterRuntime::create_klass_exception), false); | |
| 128 } else { | |
| 129 __ load_const_optimized(R5_ARG3, (address) message, R11_scratch1); | |
| 130 __ call_VM(Rexception, CAST_FROM_FN_PTR(address, InterpreterRuntime::create_exception), false); | |
| 131 } | |
| 132 | |
| 133 // Throw exception. | |
| 134 __ mr(R3_ARG1, Rexception); | |
| 135 __ load_const_optimized(R11_scratch1, Interpreter::throw_exception_entry(), R12_scratch2); | |
| 136 __ mtctr(R11_scratch1); | |
| 137 __ bctr(); | |
| 138 | |
| 139 return entry; | |
| 140 } | |
| 141 | |
| 142 address TemplateInterpreterGenerator::generate_continuation_for(TosState state) { | |
| 143 address entry = __ pc(); | |
| 144 __ unimplemented("generate_continuation_for"); | |
| 145 return entry; | |
| 146 } | |
| 147 | |
| 148 // This entry is returned to when a call returns to the interpreter. | |
| 149 // When we arrive here, we expect that the callee stack frame is already popped. | |
| 150 address TemplateInterpreterGenerator::generate_return_entry_for(TosState state, int step, size_t index_size) { | |
| 151 address entry = __ pc(); | |
| 152 | |
| 153 // Move the value out of the return register back to the TOS cache of current frame. | |
| 154 switch (state) { | |
| 155 case ltos: | |
| 156 case btos: | |
| 157 case ctos: | |
| 158 case stos: | |
| 159 case atos: | |
| 160 case itos: __ mr(R17_tos, R3_RET); break; // RET -> TOS cache | |
| 161 case ftos: | |
| 162 case dtos: __ fmr(F15_ftos, F1_RET); break; // TOS cache -> GR_FRET | |
| 163 case vtos: break; // Nothing to do, this was a void return. | |
| 164 default : ShouldNotReachHere(); | |
| 165 } | |
| 166 | |
| 167 __ restore_interpreter_state(R11_scratch1); // Sets R11_scratch1 = fp. | |
| 168 __ ld(R12_scratch2, _ijava_state_neg(top_frame_sp), R11_scratch1); | |
| 169 __ resize_frame_absolute(R12_scratch2, R11_scratch1, R0); | |
| 170 | |
| 171 // Compiled code destroys templateTableBase, reload. | |
| 172 __ load_const_optimized(R25_templateTableBase, (address)Interpreter::dispatch_table((TosState)0), R12_scratch2); | |
| 173 | |
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174 if (state == atos) { |
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175 __ profile_return_type(R3_RET, R11_scratch1, R12_scratch2); |
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176 } |
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177 |
| 14694 | 178 const Register cache = R11_scratch1; |
| 179 const Register size = R12_scratch2; | |
| 180 __ get_cache_and_index_at_bcp(cache, 1, index_size); | |
| 181 | |
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182 // Get least significant byte of 64 bit value: |
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183 #if defined(VM_LITTLE_ENDIAN) |
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184 __ lbz(size, in_bytes(ConstantPoolCache::base_offset() + ConstantPoolCacheEntry::flags_offset()), cache); |
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185 #else |
| 14694 | 186 __ lbz(size, in_bytes(ConstantPoolCache::base_offset() + ConstantPoolCacheEntry::flags_offset()) + 7, cache); |
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187 #endif |
| 14694 | 188 __ sldi(size, size, Interpreter::logStackElementSize); |
| 189 __ add(R15_esp, R15_esp, size); | |
| 190 __ dispatch_next(state, step); | |
| 191 return entry; | |
| 192 } | |
| 193 | |
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194 address InterpreterGenerator::generate_deopt_entry_for(TosState state, int step) { |
| 14694 | 195 address entry = __ pc(); |
| 196 // If state != vtos, we're returning from a native method, which put it's result | |
| 197 // into the result register. So move the value out of the return register back | |
| 198 // to the TOS cache of current frame. | |
| 199 | |
| 200 switch (state) { | |
| 201 case ltos: | |
| 202 case btos: | |
| 203 case ctos: | |
| 204 case stos: | |
| 205 case atos: | |
| 206 case itos: __ mr(R17_tos, R3_RET); break; // GR_RET -> TOS cache | |
| 207 case ftos: | |
| 208 case dtos: __ fmr(F15_ftos, F1_RET); break; // TOS cache -> GR_FRET | |
| 209 case vtos: break; // Nothing to do, this was a void return. | |
| 210 default : ShouldNotReachHere(); | |
| 211 } | |
| 212 | |
| 213 // Load LcpoolCache @@@ should be already set! | |
| 214 __ get_constant_pool_cache(R27_constPoolCache); | |
| 215 | |
| 216 // Handle a pending exception, fall through if none. | |
| 217 __ check_and_forward_exception(R11_scratch1, R12_scratch2); | |
| 218 | |
| 219 // Start executing bytecodes. | |
| 220 __ dispatch_next(state, step); | |
| 221 | |
| 222 return entry; | |
| 223 } | |
| 224 | |
| 225 // A result handler converts the native result into java format. | |
| 226 // Use the shared code between c++ and template interpreter. | |
| 227 address TemplateInterpreterGenerator::generate_result_handler_for(BasicType type) { | |
| 228 return AbstractInterpreterGenerator::generate_result_handler_for(type); | |
| 229 } | |
| 230 | |
| 231 address TemplateInterpreterGenerator::generate_safept_entry_for(TosState state, address runtime_entry) { | |
| 232 address entry = __ pc(); | |
| 233 | |
| 234 __ push(state); | |
| 235 __ call_VM(noreg, runtime_entry); | |
| 236 __ dispatch_via(vtos, Interpreter::_normal_table.table_for(vtos)); | |
| 237 | |
| 238 return entry; | |
| 239 } | |
| 240 | |
| 241 // Helpers for commoning out cases in the various type of method entries. | |
| 242 | |
| 243 // Increment invocation count & check for overflow. | |
| 244 // | |
| 245 // Note: checking for negative value instead of overflow | |
| 246 // so we have a 'sticky' overflow test. | |
| 247 // | |
| 248 void TemplateInterpreterGenerator::generate_counter_incr(Label* overflow, Label* profile_method, Label* profile_method_continue) { | |
| 249 // Note: In tiered we increment either counters in method or in MDO depending if we're profiling or not. | |
| 250 Register Rscratch1 = R11_scratch1; | |
| 251 Register Rscratch2 = R12_scratch2; | |
| 252 Register R3_counters = R3_ARG1; | |
| 253 Label done; | |
| 254 | |
| 255 if (TieredCompilation) { | |
| 256 const int increment = InvocationCounter::count_increment; | |
| 257 const int mask = ((1 << Tier0InvokeNotifyFreqLog) - 1) << InvocationCounter::count_shift; | |
| 258 Label no_mdo; | |
| 259 if (ProfileInterpreter) { | |
| 260 const Register Rmdo = Rscratch1; | |
| 261 // If no method data exists, go to profile_continue. | |
| 262 __ ld(Rmdo, in_bytes(Method::method_data_offset()), R19_method); | |
| 263 __ cmpdi(CCR0, Rmdo, 0); | |
| 264 __ beq(CCR0, no_mdo); | |
| 265 | |
| 266 // Increment backedge counter in the MDO. | |
| 267 const int mdo_bc_offs = in_bytes(MethodData::backedge_counter_offset()) + in_bytes(InvocationCounter::counter_offset()); | |
| 268 __ lwz(Rscratch2, mdo_bc_offs, Rmdo); | |
| 269 __ addi(Rscratch2, Rscratch2, increment); | |
| 270 __ stw(Rscratch2, mdo_bc_offs, Rmdo); | |
| 271 __ load_const_optimized(Rscratch1, mask, R0); | |
| 272 __ and_(Rscratch1, Rscratch2, Rscratch1); | |
| 273 __ bne(CCR0, done); | |
| 274 __ b(*overflow); | |
| 275 } | |
| 276 | |
| 277 // Increment counter in MethodCounters*. | |
| 278 const int mo_bc_offs = in_bytes(MethodCounters::backedge_counter_offset()) + in_bytes(InvocationCounter::counter_offset()); | |
| 279 __ bind(no_mdo); | |
| 280 __ get_method_counters(R19_method, R3_counters, done); | |
| 281 __ lwz(Rscratch2, mo_bc_offs, R3_counters); | |
| 282 __ addi(Rscratch2, Rscratch2, increment); | |
| 283 __ stw(Rscratch2, mo_bc_offs, R3_counters); | |
| 284 __ load_const_optimized(Rscratch1, mask, R0); | |
| 285 __ and_(Rscratch1, Rscratch2, Rscratch1); | |
| 286 __ beq(CCR0, *overflow); | |
| 287 | |
| 288 __ bind(done); | |
| 289 | |
| 290 } else { | |
| 291 | |
| 292 // Update standard invocation counters. | |
| 293 Register Rsum_ivc_bec = R4_ARG2; | |
| 294 __ get_method_counters(R19_method, R3_counters, done); | |
| 295 __ increment_invocation_counter(R3_counters, Rsum_ivc_bec, R12_scratch2); | |
| 296 // Increment interpreter invocation counter. | |
| 297 if (ProfileInterpreter) { // %%% Merge this into methodDataOop. | |
| 298 __ lwz(R12_scratch2, in_bytes(MethodCounters::interpreter_invocation_counter_offset()), R3_counters); | |
| 299 __ addi(R12_scratch2, R12_scratch2, 1); | |
| 300 __ stw(R12_scratch2, in_bytes(MethodCounters::interpreter_invocation_counter_offset()), R3_counters); | |
| 301 } | |
| 302 // Check if we must create a method data obj. | |
| 303 if (ProfileInterpreter && profile_method != NULL) { | |
| 304 const Register profile_limit = Rscratch1; | |
| 305 int pl_offs = __ load_const_optimized(profile_limit, &InvocationCounter::InterpreterProfileLimit, R0, true); | |
| 306 __ lwz(profile_limit, pl_offs, profile_limit); | |
| 307 // Test to see if we should create a method data oop. | |
| 308 __ cmpw(CCR0, Rsum_ivc_bec, profile_limit); | |
| 309 __ blt(CCR0, *profile_method_continue); | |
| 310 // If no method data exists, go to profile_method. | |
| 311 __ test_method_data_pointer(*profile_method); | |
| 312 } | |
| 313 // Finally check for counter overflow. | |
| 314 if (overflow) { | |
| 315 const Register invocation_limit = Rscratch1; | |
| 316 int il_offs = __ load_const_optimized(invocation_limit, &InvocationCounter::InterpreterInvocationLimit, R0, true); | |
| 317 __ lwz(invocation_limit, il_offs, invocation_limit); | |
| 318 assert(4 == sizeof(InvocationCounter::InterpreterInvocationLimit), "unexpected field size"); | |
| 319 __ cmpw(CCR0, Rsum_ivc_bec, invocation_limit); | |
| 320 __ bge(CCR0, *overflow); | |
| 321 } | |
| 322 | |
| 323 __ bind(done); | |
| 324 } | |
| 325 } | |
| 326 | |
| 327 // Generate code to initiate compilation on invocation counter overflow. | |
| 328 void TemplateInterpreterGenerator::generate_counter_overflow(Label& continue_entry) { | |
| 329 // Generate code to initiate compilation on the counter overflow. | |
| 330 | |
| 331 // InterpreterRuntime::frequency_counter_overflow takes one arguments, | |
| 332 // which indicates if the counter overflow occurs at a backwards branch (NULL bcp) | |
| 333 // We pass zero in. | |
| 334 // The call returns the address of the verified entry point for the method or NULL | |
| 335 // if the compilation did not complete (either went background or bailed out). | |
| 336 // | |
| 337 // Unlike the C++ interpreter above: Check exceptions! | |
| 338 // Assumption: Caller must set the flag "do_not_unlock_if_sychronized" if the monitor of a sync'ed | |
| 339 // method has not yet been created. Thus, no unlocking of a non-existing monitor can occur. | |
| 340 | |
| 341 __ li(R4_ARG2, 0); | |
| 342 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::frequency_counter_overflow), R4_ARG2, true); | |
| 343 | |
| 344 // Returns verified_entry_point or NULL. | |
| 345 // We ignore it in any case. | |
| 346 __ b(continue_entry); | |
| 347 } | |
| 348 | |
| 349 void TemplateInterpreterGenerator::generate_stack_overflow_check(Register Rmem_frame_size, Register Rscratch1) { | |
| 350 assert_different_registers(Rmem_frame_size, Rscratch1); | |
| 351 __ generate_stack_overflow_check_with_compare_and_throw(Rmem_frame_size, Rscratch1); | |
| 352 } | |
| 353 | |
| 354 void TemplateInterpreterGenerator::unlock_method(bool check_exceptions) { | |
| 355 __ unlock_object(R26_monitor, check_exceptions); | |
| 356 } | |
| 357 | |
| 358 // Lock the current method, interpreter register window must be set up! | |
| 359 void TemplateInterpreterGenerator::lock_method(Register Rflags, Register Rscratch1, Register Rscratch2, bool flags_preloaded) { | |
| 360 const Register Robj_to_lock = Rscratch2; | |
| 361 | |
| 362 { | |
| 363 if (!flags_preloaded) { | |
| 364 __ lwz(Rflags, method_(access_flags)); | |
| 365 } | |
| 366 | |
| 367 #ifdef ASSERT | |
| 368 // Check if methods needs synchronization. | |
| 369 { | |
| 370 Label Lok; | |
| 371 __ testbitdi(CCR0, R0, Rflags, JVM_ACC_SYNCHRONIZED_BIT); | |
| 372 __ btrue(CCR0,Lok); | |
| 373 __ stop("method doesn't need synchronization"); | |
| 374 __ bind(Lok); | |
| 375 } | |
| 376 #endif // ASSERT | |
| 377 } | |
| 378 | |
| 379 // Get synchronization object to Rscratch2. | |
| 380 { | |
| 381 const int mirror_offset = in_bytes(Klass::java_mirror_offset()); | |
| 382 Label Lstatic; | |
| 383 Label Ldone; | |
| 384 | |
| 385 __ testbitdi(CCR0, R0, Rflags, JVM_ACC_STATIC_BIT); | |
| 386 __ btrue(CCR0, Lstatic); | |
| 387 | |
| 388 // Non-static case: load receiver obj from stack and we're done. | |
| 389 __ ld(Robj_to_lock, R18_locals); | |
| 390 __ b(Ldone); | |
| 391 | |
| 392 __ bind(Lstatic); // Static case: Lock the java mirror | |
| 393 __ ld(Robj_to_lock, in_bytes(Method::const_offset()), R19_method); | |
| 394 __ ld(Robj_to_lock, in_bytes(ConstMethod::constants_offset()), Robj_to_lock); | |
| 395 __ ld(Robj_to_lock, ConstantPool::pool_holder_offset_in_bytes(), Robj_to_lock); | |
| 396 __ ld(Robj_to_lock, mirror_offset, Robj_to_lock); | |
| 397 | |
| 398 __ bind(Ldone); | |
| 399 __ verify_oop(Robj_to_lock); | |
| 400 } | |
| 401 | |
| 402 // Got the oop to lock => execute! | |
| 403 __ add_monitor_to_stack(true, Rscratch1, R0); | |
| 404 | |
| 405 __ std(Robj_to_lock, BasicObjectLock::obj_offset_in_bytes(), R26_monitor); | |
| 406 __ lock_object(R26_monitor, Robj_to_lock); | |
| 407 } | |
| 408 | |
| 409 // Generate a fixed interpreter frame for pure interpreter | |
| 410 // and I2N native transition frames. | |
| 411 // | |
| 412 // Before (stack grows downwards): | |
| 413 // | |
| 414 // | ... | | |
| 415 // |------------- | | |
| 416 // | java arg0 | | |
| 417 // | ... | | |
| 418 // | java argn | | |
| 419 // | | <- R15_esp | |
| 420 // | | | |
| 421 // |--------------| | |
| 422 // | abi_112 | | |
| 423 // | | <- R1_SP | |
| 424 // |==============| | |
| 425 // | |
| 426 // | |
| 427 // After: | |
| 428 // | |
| 429 // | ... | | |
| 430 // | java arg0 |<- R18_locals | |
| 431 // | ... | | |
| 432 // | java argn | | |
| 433 // |--------------| | |
| 434 // | | | |
| 435 // | java locals | | |
| 436 // | | | |
| 437 // |--------------| | |
| 438 // | abi_48 | | |
| 439 // |==============| | |
| 440 // | | | |
| 441 // | istate | | |
| 442 // | | | |
| 443 // |--------------| | |
| 444 // | monitor |<- R26_monitor | |
| 445 // |--------------| | |
| 446 // | |<- R15_esp | |
| 447 // | expression | | |
| 448 // | stack | | |
| 449 // | | | |
| 450 // |--------------| | |
| 451 // | | | |
| 452 // | abi_112 |<- R1_SP | |
| 453 // |==============| | |
| 454 // | |
| 455 // The top most frame needs an abi space of 112 bytes. This space is needed, | |
| 456 // since we call to c. The c function may spill their arguments to the caller | |
| 457 // frame. When we call to java, we don't need these spill slots. In order to save | |
| 458 // space on the stack, we resize the caller. However, java local reside in | |
| 459 // the caller frame and the frame has to be increased. The frame_size for the | |
| 460 // current frame was calculated based on max_stack as size for the expression | |
| 461 // stack. At the call, just a part of the expression stack might be used. | |
| 462 // We don't want to waste this space and cut the frame back accordingly. | |
| 463 // The resulting amount for resizing is calculated as follows: | |
| 464 // resize = (number_of_locals - number_of_arguments) * slot_size | |
| 465 // + (R1_SP - R15_esp) + 48 | |
| 466 // | |
| 467 // The size for the callee frame is calculated: | |
| 468 // framesize = 112 + max_stack + monitor + state_size | |
| 469 // | |
| 470 // maxstack: Max number of slots on the expression stack, loaded from the method. | |
| 471 // monitor: We statically reserve room for one monitor object. | |
| 472 // state_size: We save the current state of the interpreter to this area. | |
| 473 // | |
| 474 void TemplateInterpreterGenerator::generate_fixed_frame(bool native_call, Register Rsize_of_parameters, Register Rsize_of_locals) { | |
| 475 Register parent_frame_resize = R6_ARG4, // Frame will grow by this number of bytes. | |
| 476 top_frame_size = R7_ARG5, | |
| 477 Rconst_method = R8_ARG6; | |
| 478 | |
| 479 assert_different_registers(Rsize_of_parameters, Rsize_of_locals, parent_frame_resize, top_frame_size); | |
| 480 | |
| 481 __ ld(Rconst_method, method_(const)); | |
| 482 __ lhz(Rsize_of_parameters /* number of params */, | |
| 483 in_bytes(ConstMethod::size_of_parameters_offset()), Rconst_method); | |
| 484 if (native_call) { | |
| 485 // If we're calling a native method, we reserve space for the worst-case signature | |
| 486 // handler varargs vector, which is max(Argument::n_register_parameters, parameter_count+2). | |
| 487 // We add two slots to the parameter_count, one for the jni | |
| 488 // environment and one for a possible native mirror. | |
| 489 Label skip_native_calculate_max_stack; | |
| 490 __ addi(top_frame_size, Rsize_of_parameters, 2); | |
| 491 __ cmpwi(CCR0, top_frame_size, Argument::n_register_parameters); | |
| 492 __ bge(CCR0, skip_native_calculate_max_stack); | |
| 493 __ li(top_frame_size, Argument::n_register_parameters); | |
| 494 __ bind(skip_native_calculate_max_stack); | |
| 495 __ sldi(Rsize_of_parameters, Rsize_of_parameters, Interpreter::logStackElementSize); | |
| 496 __ sldi(top_frame_size, top_frame_size, Interpreter::logStackElementSize); | |
| 497 __ sub(parent_frame_resize, R1_SP, R15_esp); // <0, off by Interpreter::stackElementSize! | |
| 498 assert(Rsize_of_locals == noreg, "Rsize_of_locals not initialized"); // Only relevant value is Rsize_of_parameters. | |
| 499 } else { | |
| 500 __ lhz(Rsize_of_locals /* number of params */, in_bytes(ConstMethod::size_of_locals_offset()), Rconst_method); | |
| 501 __ sldi(Rsize_of_parameters, Rsize_of_parameters, Interpreter::logStackElementSize); | |
| 502 __ sldi(Rsize_of_locals, Rsize_of_locals, Interpreter::logStackElementSize); | |
| 503 __ lhz(top_frame_size, in_bytes(ConstMethod::max_stack_offset()), Rconst_method); | |
| 504 __ sub(R11_scratch1, Rsize_of_locals, Rsize_of_parameters); // >=0 | |
| 505 __ sub(parent_frame_resize, R1_SP, R15_esp); // <0, off by Interpreter::stackElementSize! | |
| 506 __ sldi(top_frame_size, top_frame_size, Interpreter::logStackElementSize); | |
| 507 __ add(parent_frame_resize, parent_frame_resize, R11_scratch1); | |
| 508 } | |
| 509 | |
| 510 // Compute top frame size. | |
| 511 __ addi(top_frame_size, top_frame_size, frame::abi_reg_args_size + frame::ijava_state_size); | |
| 512 | |
| 513 // Cut back area between esp and max_stack. | |
| 514 __ addi(parent_frame_resize, parent_frame_resize, frame::abi_minframe_size - Interpreter::stackElementSize); | |
| 515 | |
| 516 __ round_to(top_frame_size, frame::alignment_in_bytes); | |
| 517 __ round_to(parent_frame_resize, frame::alignment_in_bytes); | |
| 518 // parent_frame_resize = (locals-parameters) - (ESP-SP-ABI48) Rounded to frame alignment size. | |
| 519 // Enlarge by locals-parameters (not in case of native_call), shrink by ESP-SP-ABI48. | |
| 520 | |
| 521 { | |
| 522 // -------------------------------------------------------------------------- | |
| 523 // Stack overflow check | |
| 524 | |
| 525 Label cont; | |
| 526 __ add(R11_scratch1, parent_frame_resize, top_frame_size); | |
| 527 generate_stack_overflow_check(R11_scratch1, R12_scratch2); | |
| 528 } | |
| 529 | |
| 530 // Set up interpreter state registers. | |
| 531 | |
| 532 __ add(R18_locals, R15_esp, Rsize_of_parameters); | |
| 533 __ ld(R27_constPoolCache, in_bytes(ConstMethod::constants_offset()), Rconst_method); | |
| 534 __ ld(R27_constPoolCache, ConstantPool::cache_offset_in_bytes(), R27_constPoolCache); | |
| 535 | |
| 536 // Set method data pointer. | |
| 537 if (ProfileInterpreter) { | |
| 538 Label zero_continue; | |
| 539 __ ld(R28_mdx, method_(method_data)); | |
| 540 __ cmpdi(CCR0, R28_mdx, 0); | |
| 541 __ beq(CCR0, zero_continue); | |
| 542 __ addi(R28_mdx, R28_mdx, in_bytes(MethodData::data_offset())); | |
| 543 __ bind(zero_continue); | |
| 544 } | |
| 545 | |
| 546 if (native_call) { | |
| 547 __ li(R14_bcp, 0); // Must initialize. | |
| 548 } else { | |
| 549 __ add(R14_bcp, in_bytes(ConstMethod::codes_offset()), Rconst_method); | |
| 550 } | |
| 551 | |
| 552 // Resize parent frame. | |
| 553 __ mflr(R12_scratch2); | |
| 554 __ neg(parent_frame_resize, parent_frame_resize); | |
| 555 __ resize_frame(parent_frame_resize, R11_scratch1); | |
| 556 __ std(R12_scratch2, _abi(lr), R1_SP); | |
| 557 | |
| 558 __ addi(R26_monitor, R1_SP, - frame::ijava_state_size); | |
| 559 __ addi(R15_esp, R26_monitor, - Interpreter::stackElementSize); | |
| 560 | |
| 561 // Store values. | |
| 562 // R15_esp, R14_bcp, R26_monitor, R28_mdx are saved at java calls | |
| 563 // in InterpreterMacroAssembler::call_from_interpreter. | |
| 564 __ std(R19_method, _ijava_state_neg(method), R1_SP); | |
| 565 __ std(R21_sender_SP, _ijava_state_neg(sender_sp), R1_SP); | |
| 566 __ std(R27_constPoolCache, _ijava_state_neg(cpoolCache), R1_SP); | |
| 567 __ std(R18_locals, _ijava_state_neg(locals), R1_SP); | |
| 568 | |
| 569 // Note: esp, bcp, monitor, mdx live in registers. Hence, the correct version can only | |
| 570 // be found in the frame after save_interpreter_state is done. This is always true | |
| 571 // for non-top frames. But when a signal occurs, dumping the top frame can go wrong, | |
| 572 // because e.g. frame::interpreter_frame_bcp() will not access the correct value | |
| 573 // (Enhanced Stack Trace). | |
| 574 // The signal handler does not save the interpreter state into the frame. | |
| 575 __ li(R0, 0); | |
| 576 #ifdef ASSERT | |
| 577 // Fill remaining slots with constants. | |
| 578 __ load_const_optimized(R11_scratch1, 0x5afe); | |
| 579 __ load_const_optimized(R12_scratch2, 0xdead); | |
| 580 #endif | |
| 581 // We have to initialize some frame slots for native calls (accessed by GC). | |
| 582 if (native_call) { | |
| 583 __ std(R26_monitor, _ijava_state_neg(monitors), R1_SP); | |
| 584 __ std(R14_bcp, _ijava_state_neg(bcp), R1_SP); | |
| 585 if (ProfileInterpreter) { __ std(R28_mdx, _ijava_state_neg(mdx), R1_SP); } | |
| 586 } | |
| 587 #ifdef ASSERT | |
| 588 else { | |
| 589 __ std(R12_scratch2, _ijava_state_neg(monitors), R1_SP); | |
| 590 __ std(R12_scratch2, _ijava_state_neg(bcp), R1_SP); | |
| 591 __ std(R12_scratch2, _ijava_state_neg(mdx), R1_SP); | |
| 592 } | |
| 593 __ std(R11_scratch1, _ijava_state_neg(ijava_reserved), R1_SP); | |
| 594 __ std(R12_scratch2, _ijava_state_neg(esp), R1_SP); | |
| 595 __ std(R12_scratch2, _ijava_state_neg(lresult), R1_SP); | |
| 596 __ std(R12_scratch2, _ijava_state_neg(fresult), R1_SP); | |
| 597 #endif | |
| 598 __ subf(R12_scratch2, top_frame_size, R1_SP); | |
| 599 __ std(R0, _ijava_state_neg(oop_tmp), R1_SP); | |
| 600 __ std(R12_scratch2, _ijava_state_neg(top_frame_sp), R1_SP); | |
| 601 | |
| 602 // Push top frame. | |
| 603 __ push_frame(top_frame_size, R11_scratch1); | |
| 604 } | |
| 605 | |
| 606 // End of helpers | |
| 607 | |
| 608 // ============================================================================ | |
| 609 // Various method entries | |
| 610 // | |
| 611 | |
| 612 // Empty method, generate a very fast return. We must skip this entry if | |
| 613 // someone's debugging, indicated by the flag | |
| 614 // "interp_mode" in the Thread obj. | |
| 615 // Note: empty methods are generated mostly methods that do assertions, which are | |
| 616 // disabled in the "java opt build". | |
| 617 address TemplateInterpreterGenerator::generate_empty_entry(void) { | |
| 618 if (!UseFastEmptyMethods) { | |
| 619 NOT_PRODUCT(__ should_not_reach_here();) | |
| 620 return Interpreter::entry_for_kind(Interpreter::zerolocals); | |
| 621 } | |
| 622 | |
| 623 Label Lslow_path; | |
| 624 const Register Rjvmti_mode = R11_scratch1; | |
| 625 address entry = __ pc(); | |
| 626 | |
| 627 __ lwz(Rjvmti_mode, thread_(interp_only_mode)); | |
| 628 __ cmpwi(CCR0, Rjvmti_mode, 0); | |
| 629 __ bne(CCR0, Lslow_path); // jvmti_mode!=0 | |
| 630 | |
| 631 // Noone's debuggin: Simply return. | |
| 632 // Pop c2i arguments (if any) off when we return. | |
| 633 #ifdef ASSERT | |
| 634 __ ld(R9_ARG7, 0, R1_SP); | |
| 635 __ ld(R10_ARG8, 0, R21_sender_SP); | |
| 636 __ cmpd(CCR0, R9_ARG7, R10_ARG8); | |
| 637 __ asm_assert_eq("backlink", 0x545); | |
| 638 #endif // ASSERT | |
| 639 __ mr(R1_SP, R21_sender_SP); // Cut the stack back to where the caller started. | |
| 640 | |
| 641 // And we're done. | |
| 642 __ blr(); | |
| 643 | |
| 644 __ bind(Lslow_path); | |
| 645 __ branch_to_entry(Interpreter::entry_for_kind(Interpreter::zerolocals), R11_scratch1); | |
| 646 __ flush(); | |
| 647 | |
| 648 return entry; | |
| 649 } | |
| 650 | |
| 651 // Support abs and sqrt like in compiler. | |
| 652 // For others we can use a normal (native) entry. | |
| 653 | |
| 654 inline bool math_entry_available(AbstractInterpreter::MethodKind kind) { | |
| 655 // Provide math entry with debugging on demand. | |
| 656 // Note: Debugging changes which code will get executed: | |
| 657 // Debugging or disabled InlineIntrinsics: java method will get interpreted and performs a native call. | |
| 658 // Not debugging and enabled InlineIntrinics: processor instruction will get used. | |
| 659 // Result might differ slightly due to rounding etc. | |
| 660 if (!InlineIntrinsics && (!FLAG_IS_ERGO(InlineIntrinsics))) return false; // Generate a vanilla entry. | |
| 661 | |
| 662 return ((kind==Interpreter::java_lang_math_sqrt && VM_Version::has_fsqrt()) || | |
| 663 (kind==Interpreter::java_lang_math_abs)); | |
| 664 } | |
| 665 | |
| 666 address TemplateInterpreterGenerator::generate_math_entry(AbstractInterpreter::MethodKind kind) { | |
| 667 if (!math_entry_available(kind)) { | |
| 668 NOT_PRODUCT(__ should_not_reach_here();) | |
| 669 return Interpreter::entry_for_kind(Interpreter::zerolocals); | |
| 670 } | |
| 671 | |
| 672 Label Lslow_path; | |
| 673 const Register Rjvmti_mode = R11_scratch1; | |
| 674 address entry = __ pc(); | |
| 675 | |
| 676 // Provide math entry with debugging on demand. | |
| 677 __ lwz(Rjvmti_mode, thread_(interp_only_mode)); | |
| 678 __ cmpwi(CCR0, Rjvmti_mode, 0); | |
| 679 __ bne(CCR0, Lslow_path); // jvmti_mode!=0 | |
| 680 | |
| 681 __ lfd(F1_RET, Interpreter::stackElementSize, R15_esp); | |
| 682 | |
| 683 // Pop c2i arguments (if any) off when we return. | |
| 684 #ifdef ASSERT | |
| 685 __ ld(R9_ARG7, 0, R1_SP); | |
| 686 __ ld(R10_ARG8, 0, R21_sender_SP); | |
| 687 __ cmpd(CCR0, R9_ARG7, R10_ARG8); | |
| 688 __ asm_assert_eq("backlink", 0x545); | |
| 689 #endif // ASSERT | |
| 690 __ mr(R1_SP, R21_sender_SP); // Cut the stack back to where the caller started. | |
| 691 | |
| 692 if (kind == Interpreter::java_lang_math_sqrt) { | |
| 693 __ fsqrt(F1_RET, F1_RET); | |
| 694 } else if (kind == Interpreter::java_lang_math_abs) { | |
| 695 __ fabs(F1_RET, F1_RET); | |
| 696 } else { | |
| 697 ShouldNotReachHere(); | |
| 698 } | |
| 699 | |
| 700 // And we're done. | |
| 701 __ blr(); | |
| 702 | |
| 703 // Provide slow path for JVMTI case. | |
| 704 __ bind(Lslow_path); | |
| 705 __ branch_to_entry(Interpreter::entry_for_kind(Interpreter::zerolocals), R12_scratch2); | |
| 706 __ flush(); | |
| 707 | |
| 708 return entry; | |
| 709 } | |
| 710 | |
| 711 // Interpreter stub for calling a native method. (asm interpreter) | |
| 712 // This sets up a somewhat different looking stack for calling the | |
| 713 // native method than the typical interpreter frame setup. | |
| 714 // | |
| 715 // On entry: | |
| 716 // R19_method - method | |
| 717 // R16_thread - JavaThread* | |
| 718 // R15_esp - intptr_t* sender tos | |
| 719 // | |
| 720 // abstract stack (grows up) | |
| 721 // [ IJava (caller of JNI callee) ] <-- ASP | |
| 722 // ... | |
| 723 address TemplateInterpreterGenerator::generate_native_entry(bool synchronized) { | |
| 724 | |
| 725 address entry = __ pc(); | |
| 726 | |
| 727 const bool inc_counter = UseCompiler || CountCompiledCalls; | |
| 728 | |
| 729 // ----------------------------------------------------------------------------- | |
| 730 // Allocate a new frame that represents the native callee (i2n frame). | |
| 731 // This is not a full-blown interpreter frame, but in particular, the | |
| 732 // following registers are valid after this: | |
| 733 // - R19_method | |
| 734 // - R18_local (points to start of argumuments to native function) | |
| 735 // | |
| 736 // abstract stack (grows up) | |
| 737 // [ IJava (caller of JNI callee) ] <-- ASP | |
| 738 // ... | |
| 739 | |
| 740 const Register signature_handler_fd = R11_scratch1; | |
| 741 const Register pending_exception = R0; | |
| 742 const Register result_handler_addr = R31; | |
| 743 const Register native_method_fd = R11_scratch1; | |
| 744 const Register access_flags = R22_tmp2; | |
| 745 const Register active_handles = R11_scratch1; // R26_monitor saved to state. | |
| 746 const Register sync_state = R12_scratch2; | |
| 747 const Register sync_state_addr = sync_state; // Address is dead after use. | |
| 748 const Register suspend_flags = R11_scratch1; | |
| 749 | |
| 750 //============================================================================= | |
| 751 // Allocate new frame and initialize interpreter state. | |
| 752 | |
| 753 Label exception_return; | |
| 754 Label exception_return_sync_check; | |
| 755 Label stack_overflow_return; | |
| 756 | |
| 757 // Generate new interpreter state and jump to stack_overflow_return in case of | |
| 758 // a stack overflow. | |
| 759 //generate_compute_interpreter_state(stack_overflow_return); | |
| 760 | |
| 761 Register size_of_parameters = R22_tmp2; | |
| 762 | |
| 763 generate_fixed_frame(true, size_of_parameters, noreg /* unused */); | |
| 764 | |
| 765 //============================================================================= | |
| 766 // Increment invocation counter. On overflow, entry to JNI method | |
| 767 // will be compiled. | |
| 768 Label invocation_counter_overflow, continue_after_compile; | |
| 769 if (inc_counter) { | |
| 770 if (synchronized) { | |
| 771 // Since at this point in the method invocation the exception handler | |
| 772 // would try to exit the monitor of synchronized methods which hasn't | |
| 773 // been entered yet, we set the thread local variable | |
| 774 // _do_not_unlock_if_synchronized to true. If any exception was thrown by | |
| 775 // runtime, exception handling i.e. unlock_if_synchronized_method will | |
| 776 // check this thread local flag. | |
| 777 // This flag has two effects, one is to force an unwind in the topmost | |
| 778 // interpreter frame and not perform an unlock while doing so. | |
| 779 __ li(R0, 1); | |
| 780 __ stb(R0, in_bytes(JavaThread::do_not_unlock_if_synchronized_offset()), R16_thread); | |
| 781 } | |
| 782 generate_counter_incr(&invocation_counter_overflow, NULL, NULL); | |
| 783 | |
| 784 __ BIND(continue_after_compile); | |
| 785 // Reset the _do_not_unlock_if_synchronized flag. | |
| 786 if (synchronized) { | |
| 787 __ li(R0, 0); | |
| 788 __ stb(R0, in_bytes(JavaThread::do_not_unlock_if_synchronized_offset()), R16_thread); | |
| 789 } | |
| 790 } | |
| 791 | |
| 792 // access_flags = method->access_flags(); | |
| 793 // Load access flags. | |
| 794 assert(access_flags->is_nonvolatile(), | |
| 795 "access_flags must be in a non-volatile register"); | |
| 796 // Type check. | |
| 797 assert(4 == sizeof(AccessFlags), "unexpected field size"); | |
| 798 __ lwz(access_flags, method_(access_flags)); | |
| 799 | |
| 800 // We don't want to reload R19_method and access_flags after calls | |
| 801 // to some helper functions. | |
| 802 assert(R19_method->is_nonvolatile(), | |
| 803 "R19_method must be a non-volatile register"); | |
| 804 | |
| 805 // Check for synchronized methods. Must happen AFTER invocation counter | |
| 806 // check, so method is not locked if counter overflows. | |
| 807 | |
| 808 if (synchronized) { | |
| 809 lock_method(access_flags, R11_scratch1, R12_scratch2, true); | |
| 810 | |
| 811 // Update monitor in state. | |
| 812 __ ld(R11_scratch1, 0, R1_SP); | |
| 813 __ std(R26_monitor, _ijava_state_neg(monitors), R11_scratch1); | |
| 814 } | |
| 815 | |
| 816 // jvmti/jvmpi support | |
| 817 __ notify_method_entry(); | |
| 818 | |
| 819 //============================================================================= | |
| 820 // Get and call the signature handler. | |
| 821 | |
| 822 __ ld(signature_handler_fd, method_(signature_handler)); | |
| 823 Label call_signature_handler; | |
| 824 | |
| 825 __ cmpdi(CCR0, signature_handler_fd, 0); | |
| 826 __ bne(CCR0, call_signature_handler); | |
| 827 | |
| 828 // Method has never been called. Either generate a specialized | |
| 829 // handler or point to the slow one. | |
| 830 // | |
| 831 // Pass parameter 'false' to avoid exception check in call_VM. | |
| 832 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::prepare_native_call), R19_method, false); | |
| 833 | |
| 834 // Check for an exception while looking up the target method. If we | |
| 835 // incurred one, bail. | |
| 836 __ ld(pending_exception, thread_(pending_exception)); | |
| 837 __ cmpdi(CCR0, pending_exception, 0); | |
| 838 __ bne(CCR0, exception_return_sync_check); // Has pending exception. | |
| 839 | |
| 840 // Reload signature handler, it may have been created/assigned in the meanwhile. | |
| 841 __ ld(signature_handler_fd, method_(signature_handler)); | |
| 842 __ twi_0(signature_handler_fd); // Order wrt. load of klass mirror and entry point (isync is below). | |
| 843 | |
| 844 __ BIND(call_signature_handler); | |
| 845 | |
| 846 // Before we call the signature handler we push a new frame to | |
| 847 // protect the interpreter frame volatile registers when we return | |
| 848 // from jni but before we can get back to Java. | |
| 849 | |
| 850 // First set the frame anchor while the SP/FP registers are | |
| 851 // convenient and the slow signature handler can use this same frame | |
| 852 // anchor. | |
| 853 | |
| 854 // We have a TOP_IJAVA_FRAME here, which belongs to us. | |
| 855 __ set_top_ijava_frame_at_SP_as_last_Java_frame(R1_SP, R12_scratch2/*tmp*/); | |
| 856 | |
| 857 // Now the interpreter frame (and its call chain) have been | |
| 858 // invalidated and flushed. We are now protected against eager | |
| 859 // being enabled in native code. Even if it goes eager the | |
| 860 // registers will be reloaded as clean and we will invalidate after | |
| 861 // the call so no spurious flush should be possible. | |
| 862 | |
| 863 // Call signature handler and pass locals address. | |
| 864 // | |
| 865 // Our signature handlers copy required arguments to the C stack | |
| 866 // (outgoing C args), R3_ARG1 to R10_ARG8, and FARG1 to FARG13. | |
| 867 __ mr(R3_ARG1, R18_locals); | |
|
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868 #if !defined(ABI_ELFv2) |
| 14694 | 869 __ ld(signature_handler_fd, 0, signature_handler_fd); |
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870 #endif |
| 14694 | 871 |
| 872 __ call_stub(signature_handler_fd); | |
| 873 | |
| 874 // Remove the register parameter varargs slots we allocated in | |
| 875 // compute_interpreter_state. SP+16 ends up pointing to the ABI | |
| 876 // outgoing argument area. | |
| 877 // | |
| 878 // Not needed on PPC64. | |
| 879 //__ add(SP, SP, Argument::n_register_parameters*BytesPerWord); | |
| 880 | |
| 881 assert(result_handler_addr->is_nonvolatile(), "result_handler_addr must be in a non-volatile register"); | |
| 882 // Save across call to native method. | |
| 883 __ mr(result_handler_addr, R3_RET); | |
| 884 | |
| 885 __ isync(); // Acquire signature handler before trying to fetch the native entry point and klass mirror. | |
| 886 | |
| 887 // Set up fixed parameters and call the native method. | |
| 888 // If the method is static, get mirror into R4_ARG2. | |
| 889 { | |
| 890 Label method_is_not_static; | |
| 891 // Access_flags is non-volatile and still, no need to restore it. | |
| 892 | |
| 893 // Restore access flags. | |
| 894 __ testbitdi(CCR0, R0, access_flags, JVM_ACC_STATIC_BIT); | |
| 895 __ bfalse(CCR0, method_is_not_static); | |
| 896 | |
| 897 // constants = method->constants(); | |
| 898 __ ld(R11_scratch1, in_bytes(Method::const_offset()), R19_method); | |
| 899 __ ld(R11_scratch1, in_bytes(ConstMethod::constants_offset()), R11_scratch1); | |
| 900 // pool_holder = method->constants()->pool_holder(); | |
| 901 __ ld(R11_scratch1/*pool_holder*/, ConstantPool::pool_holder_offset_in_bytes(), | |
| 902 R11_scratch1/*constants*/); | |
| 903 | |
| 904 const int mirror_offset = in_bytes(Klass::java_mirror_offset()); | |
| 905 | |
| 906 // mirror = pool_holder->klass_part()->java_mirror(); | |
| 907 __ ld(R0/*mirror*/, mirror_offset, R11_scratch1/*pool_holder*/); | |
| 908 // state->_native_mirror = mirror; | |
| 909 | |
| 910 __ ld(R11_scratch1, 0, R1_SP); | |
| 911 __ std(R0/*mirror*/, _ijava_state_neg(oop_tmp), R11_scratch1); | |
| 912 // R4_ARG2 = &state->_oop_temp; | |
| 913 __ addi(R4_ARG2, R11_scratch1, _ijava_state_neg(oop_tmp)); | |
| 914 __ BIND(method_is_not_static); | |
| 915 } | |
| 916 | |
| 917 // At this point, arguments have been copied off the stack into | |
| 918 // their JNI positions. Oops are boxed in-place on the stack, with | |
| 919 // handles copied to arguments. The result handler address is in a | |
| 920 // register. | |
| 921 | |
| 922 // Pass JNIEnv address as first parameter. | |
| 923 __ addir(R3_ARG1, thread_(jni_environment)); | |
| 924 | |
| 925 // Load the native_method entry before we change the thread state. | |
| 926 __ ld(native_method_fd, method_(native_function)); | |
| 927 | |
| 928 //============================================================================= | |
| 929 // Transition from _thread_in_Java to _thread_in_native. As soon as | |
| 930 // we make this change the safepoint code needs to be certain that | |
| 931 // the last Java frame we established is good. The pc in that frame | |
| 932 // just needs to be near here not an actual return address. | |
| 933 | |
| 934 // We use release_store_fence to update values like the thread state, where | |
| 935 // we don't want the current thread to continue until all our prior memory | |
| 936 // accesses (including the new thread state) are visible to other threads. | |
| 937 __ li(R0, _thread_in_native); | |
| 938 __ release(); | |
| 939 | |
| 940 // TODO PPC port assert(4 == JavaThread::sz_thread_state(), "unexpected field size"); | |
| 941 __ stw(R0, thread_(thread_state)); | |
| 942 | |
| 943 if (UseMembar) { | |
| 944 __ fence(); | |
| 945 } | |
| 946 | |
| 947 //============================================================================= | |
| 948 // Call the native method. Argument registers must not have been | |
| 949 // overwritten since "__ call_stub(signature_handler);" (except for | |
| 950 // ARG1 and ARG2 for static methods). | |
| 951 __ call_c(native_method_fd); | |
| 952 | |
| 953 __ li(R0, 0); | |
| 954 __ ld(R11_scratch1, 0, R1_SP); | |
| 955 __ std(R3_RET, _ijava_state_neg(lresult), R11_scratch1); | |
| 956 __ stfd(F1_RET, _ijava_state_neg(fresult), R11_scratch1); | |
| 957 __ std(R0/*mirror*/, _ijava_state_neg(oop_tmp), R11_scratch1); // reset | |
| 958 | |
| 959 // Note: C++ interpreter needs the following here: | |
| 960 // The frame_manager_lr field, which we use for setting the last | |
| 961 // java frame, gets overwritten by the signature handler. Restore | |
| 962 // it now. | |
| 963 //__ get_PC_trash_LR(R11_scratch1); | |
| 964 //__ std(R11_scratch1, _top_ijava_frame_abi(frame_manager_lr), R1_SP); | |
| 965 | |
| 966 // Because of GC R19_method may no longer be valid. | |
| 967 | |
| 968 // Block, if necessary, before resuming in _thread_in_Java state. | |
| 969 // In order for GC to work, don't clear the last_Java_sp until after | |
| 970 // blocking. | |
| 971 | |
| 972 //============================================================================= | |
| 973 // Switch thread to "native transition" state before reading the | |
| 974 // synchronization state. This additional state is necessary | |
| 975 // because reading and testing the synchronization state is not | |
| 976 // atomic w.r.t. GC, as this scenario demonstrates: Java thread A, | |
| 977 // in _thread_in_native state, loads _not_synchronized and is | |
| 978 // preempted. VM thread changes sync state to synchronizing and | |
| 979 // suspends threads for GC. Thread A is resumed to finish this | |
| 980 // native method, but doesn't block here since it didn't see any | |
| 981 // synchronization in progress, and escapes. | |
| 982 | |
| 983 // We use release_store_fence to update values like the thread state, where | |
| 984 // we don't want the current thread to continue until all our prior memory | |
| 985 // accesses (including the new thread state) are visible to other threads. | |
| 986 __ li(R0/*thread_state*/, _thread_in_native_trans); | |
| 987 __ release(); | |
| 988 __ stw(R0/*thread_state*/, thread_(thread_state)); | |
| 989 if (UseMembar) { | |
| 990 __ fence(); | |
| 991 } | |
| 992 // Write serialization page so that the VM thread can do a pseudo remote | |
| 993 // membar. We use the current thread pointer to calculate a thread | |
| 994 // specific offset to write to within the page. This minimizes bus | |
| 995 // traffic due to cache line collision. | |
| 996 else { | |
| 997 __ serialize_memory(R16_thread, R11_scratch1, R12_scratch2); | |
| 998 } | |
| 999 | |
| 1000 // Now before we return to java we must look for a current safepoint | |
| 1001 // (a new safepoint can not start since we entered native_trans). | |
| 1002 // We must check here because a current safepoint could be modifying | |
| 1003 // the callers registers right this moment. | |
| 1004 | |
| 1005 // Acquire isn't strictly necessary here because of the fence, but | |
| 1006 // sync_state is declared to be volatile, so we do it anyway | |
| 1007 // (cmp-br-isync on one path, release (same as acquire on PPC64) on the other path). | |
| 1008 int sync_state_offs = __ load_const_optimized(sync_state_addr, SafepointSynchronize::address_of_state(), /*temp*/R0, true); | |
| 1009 | |
| 1010 // TODO PPC port assert(4 == SafepointSynchronize::sz_state(), "unexpected field size"); | |
| 1011 __ lwz(sync_state, sync_state_offs, sync_state_addr); | |
| 1012 | |
| 1013 // TODO PPC port assert(4 == Thread::sz_suspend_flags(), "unexpected field size"); | |
| 1014 __ lwz(suspend_flags, thread_(suspend_flags)); | |
| 1015 | |
| 1016 Label sync_check_done; | |
| 1017 Label do_safepoint; | |
| 1018 // No synchronization in progress nor yet synchronized. | |
| 1019 __ cmpwi(CCR0, sync_state, SafepointSynchronize::_not_synchronized); | |
| 1020 // Not suspended. | |
| 1021 __ cmpwi(CCR1, suspend_flags, 0); | |
| 1022 | |
| 1023 __ bne(CCR0, do_safepoint); | |
| 1024 __ beq(CCR1, sync_check_done); | |
| 1025 __ bind(do_safepoint); | |
| 1026 __ isync(); | |
| 1027 // Block. We do the call directly and leave the current | |
| 1028 // last_Java_frame setup undisturbed. We must save any possible | |
| 1029 // native result across the call. No oop is present. | |
| 1030 | |
| 1031 __ mr(R3_ARG1, R16_thread); | |
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1032 #if defined(ABI_ELFv2) |
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1033 __ call_c(CAST_FROM_FN_PTR(address, JavaThread::check_special_condition_for_native_trans), |
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1034 relocInfo::none); |
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1035 #else |
| 14694 | 1036 __ call_c(CAST_FROM_FN_PTR(FunctionDescriptor*, JavaThread::check_special_condition_for_native_trans), |
| 1037 relocInfo::none); | |
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1038 #endif |
| 14694 | 1039 |
| 1040 __ bind(sync_check_done); | |
| 1041 | |
| 1042 //============================================================================= | |
| 1043 // <<<<<< Back in Interpreter Frame >>>>> | |
| 1044 | |
| 1045 // We are in thread_in_native_trans here and back in the normal | |
| 1046 // interpreter frame. We don't have to do anything special about | |
| 1047 // safepoints and we can switch to Java mode anytime we are ready. | |
| 1048 | |
| 1049 // Note: frame::interpreter_frame_result has a dependency on how the | |
| 1050 // method result is saved across the call to post_method_exit. For | |
| 1051 // native methods it assumes that the non-FPU/non-void result is | |
| 1052 // saved in _native_lresult and a FPU result in _native_fresult. If | |
| 1053 // this changes then the interpreter_frame_result implementation | |
| 1054 // will need to be updated too. | |
| 1055 | |
| 1056 // On PPC64, we have stored the result directly after the native call. | |
| 1057 | |
| 1058 //============================================================================= | |
| 1059 // Back in Java | |
| 1060 | |
| 1061 // We use release_store_fence to update values like the thread state, where | |
| 1062 // we don't want the current thread to continue until all our prior memory | |
| 1063 // accesses (including the new thread state) are visible to other threads. | |
| 1064 __ li(R0/*thread_state*/, _thread_in_Java); | |
| 1065 __ release(); | |
| 1066 __ stw(R0/*thread_state*/, thread_(thread_state)); | |
| 1067 if (UseMembar) { | |
| 1068 __ fence(); | |
| 1069 } | |
| 1070 | |
| 1071 __ reset_last_Java_frame(); | |
| 1072 | |
| 1073 // Jvmdi/jvmpi support. Whether we've got an exception pending or | |
| 1074 // not, and whether unlocking throws an exception or not, we notify | |
| 1075 // on native method exit. If we do have an exception, we'll end up | |
| 1076 // in the caller's context to handle it, so if we don't do the | |
| 1077 // notify here, we'll drop it on the floor. | |
| 1078 __ notify_method_exit(true/*native method*/, | |
| 1079 ilgl /*illegal state (not used for native methods)*/, | |
| 1080 InterpreterMacroAssembler::NotifyJVMTI, | |
| 1081 false /*check_exceptions*/); | |
| 1082 | |
| 1083 //============================================================================= | |
| 1084 // Handle exceptions | |
| 1085 | |
| 1086 if (synchronized) { | |
| 1087 // Don't check for exceptions since we're still in the i2n frame. Do that | |
| 1088 // manually afterwards. | |
| 1089 unlock_method(false); | |
| 1090 } | |
| 1091 | |
| 1092 // Reset active handles after returning from native. | |
| 1093 // thread->active_handles()->clear(); | |
| 1094 __ ld(active_handles, thread_(active_handles)); | |
| 1095 // TODO PPC port assert(4 == JNIHandleBlock::top_size_in_bytes(), "unexpected field size"); | |
| 1096 __ li(R0, 0); | |
| 1097 __ stw(R0, JNIHandleBlock::top_offset_in_bytes(), active_handles); | |
| 1098 | |
| 1099 Label exception_return_sync_check_already_unlocked; | |
| 1100 __ ld(R0/*pending_exception*/, thread_(pending_exception)); | |
| 1101 __ cmpdi(CCR0, R0/*pending_exception*/, 0); | |
| 1102 __ bne(CCR0, exception_return_sync_check_already_unlocked); | |
| 1103 | |
| 1104 //----------------------------------------------------------------------------- | |
| 1105 // No exception pending. | |
| 1106 | |
| 1107 // Move native method result back into proper registers and return. | |
| 1108 // Invoke result handler (may unbox/promote). | |
| 1109 __ ld(R11_scratch1, 0, R1_SP); | |
| 1110 __ ld(R3_RET, _ijava_state_neg(lresult), R11_scratch1); | |
| 1111 __ lfd(F1_RET, _ijava_state_neg(fresult), R11_scratch1); | |
| 1112 __ call_stub(result_handler_addr); | |
| 1113 | |
| 1114 __ merge_frames(/*top_frame_sp*/ R21_sender_SP, /*return_pc*/ R0, R11_scratch1, R12_scratch2); | |
| 1115 | |
| 1116 // Must use the return pc which was loaded from the caller's frame | |
| 1117 // as the VM uses return-pc-patching for deoptimization. | |
| 1118 __ mtlr(R0); | |
| 1119 __ blr(); | |
| 1120 | |
| 1121 //----------------------------------------------------------------------------- | |
| 1122 // An exception is pending. We call into the runtime only if the | |
| 1123 // caller was not interpreted. If it was interpreted the | |
| 1124 // interpreter will do the correct thing. If it isn't interpreted | |
| 1125 // (call stub/compiled code) we will change our return and continue. | |
| 1126 | |
| 1127 __ BIND(exception_return_sync_check); | |
| 1128 | |
| 1129 if (synchronized) { | |
| 1130 // Don't check for exceptions since we're still in the i2n frame. Do that | |
| 1131 // manually afterwards. | |
| 1132 unlock_method(false); | |
| 1133 } | |
| 1134 __ BIND(exception_return_sync_check_already_unlocked); | |
| 1135 | |
| 1136 const Register return_pc = R31; | |
| 1137 | |
| 1138 __ ld(return_pc, 0, R1_SP); | |
| 1139 __ ld(return_pc, _abi(lr), return_pc); | |
| 1140 | |
| 1141 // Get the address of the exception handler. | |
| 1142 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::exception_handler_for_return_address), | |
| 1143 R16_thread, | |
| 1144 return_pc /* return pc */); | |
| 1145 __ merge_frames(/*top_frame_sp*/ R21_sender_SP, noreg, R11_scratch1, R12_scratch2); | |
| 1146 | |
| 1147 // Load the PC of the the exception handler into LR. | |
| 1148 __ mtlr(R3_RET); | |
| 1149 | |
| 1150 // Load exception into R3_ARG1 and clear pending exception in thread. | |
| 1151 __ ld(R3_ARG1/*exception*/, thread_(pending_exception)); | |
| 1152 __ li(R4_ARG2, 0); | |
| 1153 __ std(R4_ARG2, thread_(pending_exception)); | |
| 1154 | |
| 1155 // Load the original return pc into R4_ARG2. | |
| 1156 __ mr(R4_ARG2/*issuing_pc*/, return_pc); | |
| 1157 | |
| 1158 // Return to exception handler. | |
| 1159 __ blr(); | |
| 1160 | |
| 1161 //============================================================================= | |
| 1162 // Counter overflow. | |
| 1163 | |
| 1164 if (inc_counter) { | |
| 1165 // Handle invocation counter overflow. | |
| 1166 __ bind(invocation_counter_overflow); | |
| 1167 | |
| 1168 generate_counter_overflow(continue_after_compile); | |
| 1169 } | |
| 1170 | |
| 1171 return entry; | |
| 1172 } | |
| 1173 | |
| 1174 // Generic interpreted method entry to (asm) interpreter. | |
| 1175 // | |
| 1176 address TemplateInterpreterGenerator::generate_normal_entry(bool synchronized) { | |
| 1177 bool inc_counter = UseCompiler || CountCompiledCalls; | |
| 1178 address entry = __ pc(); | |
| 1179 // Generate the code to allocate the interpreter stack frame. | |
| 1180 Register Rsize_of_parameters = R4_ARG2, // Written by generate_fixed_frame. | |
| 1181 Rsize_of_locals = R5_ARG3; // Written by generate_fixed_frame. | |
| 1182 | |
| 1183 generate_fixed_frame(false, Rsize_of_parameters, Rsize_of_locals); | |
| 1184 | |
| 1185 #ifdef FAST_DISPATCH | |
| 1186 __ unimplemented("Fast dispatch in generate_normal_entry"); | |
| 1187 #if 0 | |
| 1188 __ set((intptr_t)Interpreter::dispatch_table(), IdispatchTables); | |
| 1189 // Set bytecode dispatch table base. | |
| 1190 #endif | |
| 1191 #endif | |
| 1192 | |
| 1193 // -------------------------------------------------------------------------- | |
| 1194 // Zero out non-parameter locals. | |
| 1195 // Note: *Always* zero out non-parameter locals as Sparc does. It's not | |
| 1196 // worth to ask the flag, just do it. | |
| 1197 Register Rslot_addr = R6_ARG4, | |
| 1198 Rnum = R7_ARG5; | |
| 1199 Label Lno_locals, Lzero_loop; | |
| 1200 | |
| 1201 // Set up the zeroing loop. | |
| 1202 __ subf(Rnum, Rsize_of_parameters, Rsize_of_locals); | |
| 1203 __ subf(Rslot_addr, Rsize_of_parameters, R18_locals); | |
| 1204 __ srdi_(Rnum, Rnum, Interpreter::logStackElementSize); | |
| 1205 __ beq(CCR0, Lno_locals); | |
| 1206 __ li(R0, 0); | |
| 1207 __ mtctr(Rnum); | |
| 1208 | |
| 1209 // The zero locals loop. | |
| 1210 __ bind(Lzero_loop); | |
| 1211 __ std(R0, 0, Rslot_addr); | |
| 1212 __ addi(Rslot_addr, Rslot_addr, -Interpreter::stackElementSize); | |
| 1213 __ bdnz(Lzero_loop); | |
| 1214 | |
| 1215 __ bind(Lno_locals); | |
| 1216 | |
| 1217 // -------------------------------------------------------------------------- | |
| 1218 // Counter increment and overflow check. | |
| 1219 Label invocation_counter_overflow, | |
| 1220 profile_method, | |
| 1221 profile_method_continue; | |
| 1222 if (inc_counter || ProfileInterpreter) { | |
| 1223 | |
| 1224 Register Rdo_not_unlock_if_synchronized_addr = R11_scratch1; | |
| 1225 if (synchronized) { | |
| 1226 // Since at this point in the method invocation the exception handler | |
| 1227 // would try to exit the monitor of synchronized methods which hasn't | |
| 1228 // been entered yet, we set the thread local variable | |
| 1229 // _do_not_unlock_if_synchronized to true. If any exception was thrown by | |
| 1230 // runtime, exception handling i.e. unlock_if_synchronized_method will | |
| 1231 // check this thread local flag. | |
| 1232 // This flag has two effects, one is to force an unwind in the topmost | |
| 1233 // interpreter frame and not perform an unlock while doing so. | |
| 1234 __ li(R0, 1); | |
| 1235 __ stb(R0, in_bytes(JavaThread::do_not_unlock_if_synchronized_offset()), R16_thread); | |
| 1236 } | |
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1237 |
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1238 // Argument and return type profiling. |
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1239 __ profile_parameters_type(R3_ARG1, R4_ARG2, R5_ARG3, R6_ARG4); |
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1240 |
| 14694 | 1241 // Increment invocation counter and check for overflow. |
| 1242 if (inc_counter) { | |
| 1243 generate_counter_incr(&invocation_counter_overflow, &profile_method, &profile_method_continue); | |
| 1244 } | |
| 1245 | |
| 1246 __ bind(profile_method_continue); | |
| 1247 | |
| 1248 // Reset the _do_not_unlock_if_synchronized flag. | |
| 1249 if (synchronized) { | |
| 1250 __ li(R0, 0); | |
| 1251 __ stb(R0, in_bytes(JavaThread::do_not_unlock_if_synchronized_offset()), R16_thread); | |
| 1252 } | |
| 1253 } | |
| 1254 | |
| 1255 // -------------------------------------------------------------------------- | |
| 1256 // Locking of synchronized methods. Must happen AFTER invocation_counter | |
| 1257 // check and stack overflow check, so method is not locked if overflows. | |
| 1258 if (synchronized) { | |
| 1259 lock_method(R3_ARG1, R4_ARG2, R5_ARG3); | |
| 1260 } | |
| 1261 #ifdef ASSERT | |
| 1262 else { | |
| 1263 Label Lok; | |
| 1264 __ lwz(R0, in_bytes(Method::access_flags_offset()), R19_method); | |
| 1265 __ andi_(R0, R0, JVM_ACC_SYNCHRONIZED); | |
| 1266 __ asm_assert_eq("method needs synchronization", 0x8521); | |
| 1267 __ bind(Lok); | |
| 1268 } | |
| 1269 #endif // ASSERT | |
| 1270 | |
| 1271 __ verify_thread(); | |
| 1272 | |
| 1273 // -------------------------------------------------------------------------- | |
| 1274 // JVMTI support | |
| 1275 __ notify_method_entry(); | |
| 1276 | |
| 1277 // -------------------------------------------------------------------------- | |
| 1278 // Start executing instructions. | |
| 1279 __ dispatch_next(vtos); | |
| 1280 | |
| 1281 // -------------------------------------------------------------------------- | |
| 1282 // Out of line counter overflow and MDO creation code. | |
| 1283 if (ProfileInterpreter) { | |
| 1284 // We have decided to profile this method in the interpreter. | |
| 1285 __ bind(profile_method); | |
| 1286 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::profile_method)); | |
| 1287 __ set_method_data_pointer_for_bcp(); | |
| 1288 __ b(profile_method_continue); | |
| 1289 } | |
| 1290 | |
| 1291 if (inc_counter) { | |
| 1292 // Handle invocation counter overflow. | |
| 1293 __ bind(invocation_counter_overflow); | |
| 1294 generate_counter_overflow(profile_method_continue); | |
| 1295 } | |
| 1296 return entry; | |
| 1297 } | |
| 1298 | |
| 1299 // ============================================================================= | |
| 1300 // Entry points | |
| 1301 | |
| 1302 address AbstractInterpreterGenerator::generate_method_entry( | |
| 1303 AbstractInterpreter::MethodKind kind) { | |
| 1304 // Determine code generation flags. | |
| 1305 bool synchronized = false; | |
| 1306 address entry_point = NULL; | |
| 1307 | |
| 1308 switch (kind) { | |
| 1309 case Interpreter::zerolocals : break; | |
| 1310 case Interpreter::zerolocals_synchronized: synchronized = true; break; | |
| 1311 case Interpreter::native : entry_point = ((InterpreterGenerator*) this)->generate_native_entry(false); break; | |
| 1312 case Interpreter::native_synchronized : entry_point = ((InterpreterGenerator*) this)->generate_native_entry(true); break; | |
| 1313 case Interpreter::empty : entry_point = ((InterpreterGenerator*) this)->generate_empty_entry(); break; | |
| 1314 case Interpreter::accessor : entry_point = ((InterpreterGenerator*) this)->generate_accessor_entry(); break; | |
| 1315 case Interpreter::abstract : entry_point = ((InterpreterGenerator*) this)->generate_abstract_entry(); break; | |
| 1316 | |
| 1317 case Interpreter::java_lang_math_sin : // fall thru | |
| 1318 case Interpreter::java_lang_math_cos : // fall thru | |
| 1319 case Interpreter::java_lang_math_tan : // fall thru | |
| 1320 case Interpreter::java_lang_math_abs : // fall thru | |
| 1321 case Interpreter::java_lang_math_log : // fall thru | |
| 1322 case Interpreter::java_lang_math_log10 : // fall thru | |
| 1323 case Interpreter::java_lang_math_sqrt : // fall thru | |
| 1324 case Interpreter::java_lang_math_pow : // fall thru | |
| 1325 case Interpreter::java_lang_math_exp : entry_point = ((InterpreterGenerator*) this)->generate_math_entry(kind); break; | |
| 1326 case Interpreter::java_lang_ref_reference_get | |
| 1327 : entry_point = ((InterpreterGenerator*)this)->generate_Reference_get_entry(); break; | |
| 1328 default : ShouldNotReachHere(); break; | |
| 1329 } | |
| 1330 | |
| 1331 if (entry_point) { | |
| 1332 return entry_point; | |
| 1333 } | |
| 1334 | |
| 1335 return ((InterpreterGenerator*) this)->generate_normal_entry(synchronized); | |
| 1336 } | |
| 1337 | |
| 1338 // These should never be compiled since the interpreter will prefer | |
| 1339 // the compiled version to the intrinsic version. | |
| 1340 bool AbstractInterpreter::can_be_compiled(methodHandle m) { | |
| 1341 return !math_entry_available(method_kind(m)); | |
| 1342 } | |
| 1343 | |
| 1344 // How much stack a method activation needs in stack slots. | |
| 1345 // We must calc this exactly like in generate_fixed_frame. | |
| 1346 // Note: This returns the conservative size assuming maximum alignment. | |
| 1347 int AbstractInterpreter::size_top_interpreter_activation(Method* method) { | |
| 1348 const int max_alignment_size = 2; | |
| 1349 const int abi_scratch = frame::abi_reg_args_size; | |
|
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1350 return method->max_locals() + method->max_stack() + |
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1351 frame::interpreter_frame_monitor_size() + max_alignment_size + abi_scratch; |
| 14694 | 1352 } |
| 1353 | |
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1354 // Returns number of stackElementWords needed for the interpreter frame with the |
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1355 // given sections. |
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1356 // This overestimates the stack by one slot in case of alignments. |
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1357 int AbstractInterpreter::size_activation(int max_stack, |
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1358 int temps, |
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1359 int extra_args, |
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1360 int monitors, |
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1361 int callee_params, |
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1362 int callee_locals, |
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1363 bool is_top_frame) { |
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1364 // Note: This calculation must exactly parallel the frame setup |
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1365 // in AbstractInterpreterGenerator::generate_method_entry. |
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1366 assert(Interpreter::stackElementWords == 1, "sanity"); |
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1367 const int max_alignment_space = StackAlignmentInBytes / Interpreter::stackElementSize; |
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1368 const int abi_scratch = is_top_frame ? (frame::abi_reg_args_size / Interpreter::stackElementSize) : |
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1369 (frame::abi_minframe_size / Interpreter::stackElementSize); |
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1370 const int size = |
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1371 max_stack + |
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1372 (callee_locals - callee_params) + |
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1373 monitors * frame::interpreter_frame_monitor_size() + |
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1374 max_alignment_space + |
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1375 abi_scratch + |
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1376 frame::ijava_state_size / Interpreter::stackElementSize; |
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1377 |
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1378 // Fixed size of an interpreter frame, align to 16-byte. |
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1379 return (size & -2); |
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1380 } |
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1381 |
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1382 // Fills a sceletal interpreter frame generated during deoptimizations. |
| 14694 | 1383 // |
| 1384 // Parameters: | |
| 1385 // | |
| 1386 // interpreter_frame != NULL: | |
| 1387 // set up the method, locals, and monitors. | |
| 1388 // The frame interpreter_frame, if not NULL, is guaranteed to be the | |
| 1389 // right size, as determined by a previous call to this method. | |
| 1390 // It is also guaranteed to be walkable even though it is in a skeletal state | |
| 1391 // | |
| 1392 // is_top_frame == true: | |
| 1393 // We're processing the *oldest* interpreter frame! | |
| 1394 // | |
| 1395 // pop_frame_extra_args: | |
| 1396 // If this is != 0 we are returning to a deoptimized frame by popping | |
| 1397 // off the callee frame. We want to re-execute the call that called the | |
| 1398 // callee interpreted, but since the return to the interpreter would pop | |
| 1399 // the arguments off advance the esp by dummy popframe_extra_args slots. | |
| 1400 // Popping off those will establish the stack layout as it was before the call. | |
| 1401 // | |
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1402 void AbstractInterpreter::layout_activation(Method* method, |
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1403 int tempcount, |
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1404 int popframe_extra_args, |
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1405 int moncount, |
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1406 int caller_actual_parameters, |
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1407 int callee_param_count, |
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1408 int callee_locals_count, |
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1409 frame* caller, |
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1410 frame* interpreter_frame, |
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1411 bool is_top_frame, |
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1412 bool is_bottom_frame) { |
| 14694 | 1413 |
| 1414 const int abi_scratch = is_top_frame ? (frame::abi_reg_args_size / Interpreter::stackElementSize) : | |
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1415 (frame::abi_minframe_size / Interpreter::stackElementSize); |
| 14694 | 1416 |
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1417 intptr_t* locals_base = (caller->is_interpreted_frame()) ? |
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1418 caller->interpreter_frame_esp() + caller_actual_parameters : |
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1419 caller->sp() + method->max_locals() - 1 + (frame::abi_minframe_size / Interpreter::stackElementSize) ; |
| 14694 | 1420 |
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1421 intptr_t* monitor_base = caller->sp() - frame::ijava_state_size / Interpreter::stackElementSize ; |
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1422 intptr_t* monitor = monitor_base - (moncount * frame::interpreter_frame_monitor_size()); |
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1423 intptr_t* esp_base = monitor - 1; |
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1424 intptr_t* esp = esp_base - tempcount - popframe_extra_args; |
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1425 intptr_t* sp = (intptr_t *) (((intptr_t) (esp_base - callee_locals_count + callee_param_count - method->max_stack()- abi_scratch)) & -StackAlignmentInBytes); |
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1426 intptr_t* sender_sp = caller->sp() + (frame::abi_minframe_size - frame::abi_reg_args_size) / Interpreter::stackElementSize; |
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1427 intptr_t* top_frame_sp = is_top_frame ? sp : sp + (frame::abi_minframe_size - frame::abi_reg_args_size) / Interpreter::stackElementSize; |
| 14694 | 1428 |
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1429 interpreter_frame->interpreter_frame_set_method(method); |
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1430 interpreter_frame->interpreter_frame_set_locals(locals_base); |
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1431 interpreter_frame->interpreter_frame_set_cpcache(method->constants()->cache()); |
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1432 interpreter_frame->interpreter_frame_set_esp(esp); |
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1433 interpreter_frame->interpreter_frame_set_monitor_end((BasicObjectLock *)monitor); |
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1434 interpreter_frame->interpreter_frame_set_top_frame_sp(top_frame_sp); |
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1435 if (!is_bottom_frame) { |
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1436 interpreter_frame->interpreter_frame_set_sender_sp(sender_sp); |
| 14694 | 1437 } |
| 1438 } | |
| 1439 | |
| 1440 // ============================================================================= | |
| 1441 // Exceptions | |
| 1442 | |
| 1443 void TemplateInterpreterGenerator::generate_throw_exception() { | |
| 1444 Register Rexception = R17_tos, | |
| 1445 Rcontinuation = R3_RET; | |
| 1446 | |
| 1447 // -------------------------------------------------------------------------- | |
| 1448 // Entry point if an method returns with a pending exception (rethrow). | |
| 1449 Interpreter::_rethrow_exception_entry = __ pc(); | |
| 1450 { | |
| 1451 __ restore_interpreter_state(R11_scratch1); // Sets R11_scratch1 = fp. | |
| 1452 __ ld(R12_scratch2, _ijava_state_neg(top_frame_sp), R11_scratch1); | |
| 1453 __ resize_frame_absolute(R12_scratch2, R11_scratch1, R0); | |
| 1454 | |
| 1455 // Compiled code destroys templateTableBase, reload. | |
| 1456 __ load_const_optimized(R25_templateTableBase, (address)Interpreter::dispatch_table((TosState)0), R11_scratch1); | |
| 1457 } | |
| 1458 | |
| 1459 // Entry point if a interpreted method throws an exception (throw). | |
| 1460 Interpreter::_throw_exception_entry = __ pc(); | |
| 1461 { | |
| 1462 __ mr(Rexception, R3_RET); | |
| 1463 | |
| 1464 __ verify_thread(); | |
| 1465 __ verify_oop(Rexception); | |
| 1466 | |
| 1467 // Expression stack must be empty before entering the VM in case of an exception. | |
| 1468 __ empty_expression_stack(); | |
| 1469 // Find exception handler address and preserve exception oop. | |
| 1470 // Call C routine to find handler and jump to it. | |
| 1471 __ call_VM(Rexception, CAST_FROM_FN_PTR(address, InterpreterRuntime::exception_handler_for_exception), Rexception); | |
| 1472 __ mtctr(Rcontinuation); | |
| 1473 // Push exception for exception handler bytecodes. | |
| 1474 __ push_ptr(Rexception); | |
| 1475 | |
| 1476 // Jump to exception handler (may be remove activation entry!). | |
| 1477 __ bctr(); | |
| 1478 } | |
| 1479 | |
| 1480 // If the exception is not handled in the current frame the frame is | |
| 1481 // removed and the exception is rethrown (i.e. exception | |
| 1482 // continuation is _rethrow_exception). | |
| 1483 // | |
| 1484 // Note: At this point the bci is still the bxi for the instruction | |
| 1485 // which caused the exception and the expression stack is | |
| 1486 // empty. Thus, for any VM calls at this point, GC will find a legal | |
| 1487 // oop map (with empty expression stack). | |
| 1488 | |
| 1489 // In current activation | |
| 1490 // tos: exception | |
| 1491 // bcp: exception bcp | |
| 1492 | |
| 1493 // -------------------------------------------------------------------------- | |
| 1494 // JVMTI PopFrame support | |
| 1495 | |
| 1496 Interpreter::_remove_activation_preserving_args_entry = __ pc(); | |
| 1497 { | |
| 1498 // Set the popframe_processing bit in popframe_condition indicating that we are | |
| 1499 // currently handling popframe, so that call_VMs that may happen later do not | |
| 1500 // trigger new popframe handling cycles. | |
| 1501 __ lwz(R11_scratch1, in_bytes(JavaThread::popframe_condition_offset()), R16_thread); | |
| 1502 __ ori(R11_scratch1, R11_scratch1, JavaThread::popframe_processing_bit); | |
| 1503 __ stw(R11_scratch1, in_bytes(JavaThread::popframe_condition_offset()), R16_thread); | |
| 1504 | |
| 1505 // Empty the expression stack, as in normal exception handling. | |
| 1506 __ empty_expression_stack(); | |
| 1507 __ unlock_if_synchronized_method(vtos, /* throw_monitor_exception */ false, /* install_monitor_exception */ false); | |
| 1508 | |
| 1509 // Check to see whether we are returning to a deoptimized frame. | |
| 1510 // (The PopFrame call ensures that the caller of the popped frame is | |
| 1511 // either interpreted or compiled and deoptimizes it if compiled.) | |
| 1512 // Note that we don't compare the return PC against the | |
| 1513 // deoptimization blob's unpack entry because of the presence of | |
| 1514 // adapter frames in C2. | |
| 1515 Label Lcaller_not_deoptimized; | |
| 1516 Register return_pc = R3_ARG1; | |
| 1517 __ ld(return_pc, 0, R1_SP); | |
| 1518 __ ld(return_pc, _abi(lr), return_pc); | |
| 1519 __ call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::interpreter_contains), return_pc); | |
| 1520 __ cmpdi(CCR0, R3_RET, 0); | |
| 1521 __ bne(CCR0, Lcaller_not_deoptimized); | |
| 1522 | |
| 1523 // The deoptimized case. | |
| 1524 // In this case, we can't call dispatch_next() after the frame is | |
| 1525 // popped, but instead must save the incoming arguments and restore | |
| 1526 // them after deoptimization has occurred. | |
| 1527 __ ld(R4_ARG2, in_bytes(Method::const_offset()), R19_method); | |
| 1528 __ lhz(R4_ARG2 /* number of params */, in_bytes(ConstMethod::size_of_parameters_offset()), R4_ARG2); | |
| 1529 __ slwi(R4_ARG2, R4_ARG2, Interpreter::logStackElementSize); | |
| 1530 __ addi(R5_ARG3, R18_locals, Interpreter::stackElementSize); | |
| 1531 __ subf(R5_ARG3, R4_ARG2, R5_ARG3); | |
| 1532 // Save these arguments. | |
| 1533 __ call_VM_leaf(CAST_FROM_FN_PTR(address, Deoptimization::popframe_preserve_args), R16_thread, R4_ARG2, R5_ARG3); | |
| 1534 | |
| 1535 // Inform deoptimization that it is responsible for restoring these arguments. | |
| 1536 __ load_const_optimized(R11_scratch1, JavaThread::popframe_force_deopt_reexecution_bit); | |
| 1537 __ stw(R11_scratch1, in_bytes(JavaThread::popframe_condition_offset()), R16_thread); | |
| 1538 | |
| 1539 // Return from the current method into the deoptimization blob. Will eventually | |
| 1540 // end up in the deopt interpeter entry, deoptimization prepared everything that | |
| 1541 // we will reexecute the call that called us. | |
| 1542 __ merge_frames(/*top_frame_sp*/ R21_sender_SP, /*reload return_pc*/ return_pc, R11_scratch1, R12_scratch2); | |
| 1543 __ mtlr(return_pc); | |
| 1544 __ blr(); | |
| 1545 | |
| 1546 // The non-deoptimized case. | |
| 1547 __ bind(Lcaller_not_deoptimized); | |
| 1548 | |
| 1549 // Clear the popframe condition flag. | |
| 1550 __ li(R0, 0); | |
| 1551 __ stw(R0, in_bytes(JavaThread::popframe_condition_offset()), R16_thread); | |
| 1552 | |
| 1553 // Get out of the current method and re-execute the call that called us. | |
| 17917 | 1554 __ merge_frames(/*top_frame_sp*/ R21_sender_SP, /*return_pc*/ noreg, R11_scratch1, R12_scratch2); |
| 14694 | 1555 __ restore_interpreter_state(R11_scratch1); |
| 1556 __ ld(R12_scratch2, _ijava_state_neg(top_frame_sp), R11_scratch1); | |
| 1557 __ resize_frame_absolute(R12_scratch2, R11_scratch1, R0); | |
| 1558 if (ProfileInterpreter) { | |
| 1559 __ set_method_data_pointer_for_bcp(); | |
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1560 __ ld(R11_scratch1, 0, R1_SP); |
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1561 __ std(R28_mdx, _ijava_state_neg(mdx), R11_scratch1); |
| 14694 | 1562 } |
| 17917 | 1563 #if INCLUDE_JVMTI |
| 1564 Label L_done; | |
| 1565 | |
| 1566 __ lbz(R11_scratch1, 0, R14_bcp); | |
| 1567 __ cmpwi(CCR0, R11_scratch1, Bytecodes::_invokestatic); | |
| 1568 __ bne(CCR0, L_done); | |
| 1569 | |
| 1570 // The member name argument must be restored if _invokestatic is re-executed after a PopFrame call. | |
| 1571 // Detect such a case in the InterpreterRuntime function and return the member name argument, or NULL. | |
| 1572 __ ld(R4_ARG2, 0, R18_locals); | |
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1573 __ MacroAssembler::call_VM(R4_ARG2, CAST_FROM_FN_PTR(address, InterpreterRuntime::member_name_arg_or_null), R4_ARG2, R19_method, R14_bcp, false); |
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1574 __ restore_interpreter_state(R11_scratch1, /*bcp_and_mdx_only*/ true); |
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1575 __ cmpdi(CCR0, R4_ARG2, 0); |
| 17917 | 1576 __ beq(CCR0, L_done); |
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1577 __ std(R4_ARG2, wordSize, R15_esp); |
| 17917 | 1578 __ bind(L_done); |
| 1579 #endif // INCLUDE_JVMTI | |
| 14694 | 1580 __ dispatch_next(vtos); |
| 1581 } | |
| 1582 // end of JVMTI PopFrame support | |
| 1583 | |
| 1584 // -------------------------------------------------------------------------- | |
| 1585 // Remove activation exception entry. | |
| 1586 // This is jumped to if an interpreted method can't handle an exception itself | |
| 1587 // (we come from the throw/rethrow exception entry above). We're going to call | |
| 1588 // into the VM to find the exception handler in the caller, pop the current | |
| 1589 // frame and return the handler we calculated. | |
| 1590 Interpreter::_remove_activation_entry = __ pc(); | |
| 1591 { | |
| 1592 __ pop_ptr(Rexception); | |
| 1593 __ verify_thread(); | |
| 1594 __ verify_oop(Rexception); | |
| 1595 __ std(Rexception, in_bytes(JavaThread::vm_result_offset()), R16_thread); | |
| 1596 | |
| 1597 __ unlock_if_synchronized_method(vtos, /* throw_monitor_exception */ false, true); | |
| 1598 __ notify_method_exit(false, vtos, InterpreterMacroAssembler::SkipNotifyJVMTI, false); | |
| 1599 | |
| 1600 __ get_vm_result(Rexception); | |
| 1601 | |
| 1602 // We are done with this activation frame; find out where to go next. | |
| 1603 // The continuation point will be an exception handler, which expects | |
| 1604 // the following registers set up: | |
| 1605 // | |
| 1606 // RET: exception oop | |
| 1607 // ARG2: Issuing PC (see generate_exception_blob()), only used if the caller is compiled. | |
| 1608 | |
| 1609 Register return_pc = R31; // Needs to survive the runtime call. | |
| 1610 __ ld(return_pc, 0, R1_SP); | |
| 1611 __ ld(return_pc, _abi(lr), return_pc); | |
| 1612 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::exception_handler_for_return_address), R16_thread, return_pc); | |
| 1613 | |
| 1614 // Remove the current activation. | |
| 1615 __ merge_frames(/*top_frame_sp*/ R21_sender_SP, /*return_pc*/ noreg, R11_scratch1, R12_scratch2); | |
| 1616 | |
| 1617 __ mr(R4_ARG2, return_pc); | |
| 1618 __ mtlr(R3_RET); | |
| 1619 __ mr(R3_RET, Rexception); | |
| 1620 __ blr(); | |
| 1621 } | |
| 1622 } | |
| 1623 | |
| 1624 // JVMTI ForceEarlyReturn support. | |
| 1625 // Returns "in the middle" of a method with a "fake" return value. | |
| 1626 address TemplateInterpreterGenerator::generate_earlyret_entry_for(TosState state) { | |
| 1627 | |
| 1628 Register Rscratch1 = R11_scratch1, | |
| 1629 Rscratch2 = R12_scratch2; | |
| 1630 | |
| 1631 address entry = __ pc(); | |
| 1632 __ empty_expression_stack(); | |
| 1633 | |
| 1634 __ load_earlyret_value(state, Rscratch1); | |
| 1635 | |
| 1636 __ ld(Rscratch1, in_bytes(JavaThread::jvmti_thread_state_offset()), R16_thread); | |
| 1637 // Clear the earlyret state. | |
| 1638 __ li(R0, 0); | |
| 1639 __ stw(R0, in_bytes(JvmtiThreadState::earlyret_state_offset()), Rscratch1); | |
| 1640 | |
| 1641 __ remove_activation(state, false, false); | |
| 1642 // Copied from TemplateTable::_return. | |
| 1643 // Restoration of lr done by remove_activation. | |
| 1644 switch (state) { | |
| 1645 case ltos: | |
| 1646 case btos: | |
| 1647 case ctos: | |
| 1648 case stos: | |
| 1649 case atos: | |
| 1650 case itos: __ mr(R3_RET, R17_tos); break; | |
| 1651 case ftos: | |
| 1652 case dtos: __ fmr(F1_RET, F15_ftos); break; | |
| 1653 case vtos: // This might be a constructor. Final fields (and volatile fields on PPC64) need | |
| 1654 // to get visible before the reference to the object gets stored anywhere. | |
| 1655 __ membar(Assembler::StoreStore); break; | |
| 1656 default : ShouldNotReachHere(); | |
| 1657 } | |
| 1658 __ blr(); | |
| 1659 | |
| 1660 return entry; | |
| 1661 } // end of ForceEarlyReturn support | |
| 1662 | |
| 1663 //----------------------------------------------------------------------------- | |
| 1664 // Helper for vtos entry point generation | |
| 1665 | |
| 1666 void TemplateInterpreterGenerator::set_vtos_entry_points(Template* t, | |
| 1667 address& bep, | |
| 1668 address& cep, | |
| 1669 address& sep, | |
| 1670 address& aep, | |
| 1671 address& iep, | |
| 1672 address& lep, | |
| 1673 address& fep, | |
| 1674 address& dep, | |
| 1675 address& vep) { | |
| 1676 assert(t->is_valid() && t->tos_in() == vtos, "illegal template"); | |
| 1677 Label L; | |
| 1678 | |
| 1679 aep = __ pc(); __ push_ptr(); __ b(L); | |
| 1680 fep = __ pc(); __ push_f(); __ b(L); | |
| 1681 dep = __ pc(); __ push_d(); __ b(L); | |
| 1682 lep = __ pc(); __ push_l(); __ b(L); | |
| 1683 __ align(32, 12, 24); // align L | |
| 1684 bep = cep = sep = | |
| 1685 iep = __ pc(); __ push_i(); | |
| 1686 vep = __ pc(); | |
| 1687 __ bind(L); | |
| 1688 generate_and_dispatch(t); | |
| 1689 } | |
| 1690 | |
| 1691 //----------------------------------------------------------------------------- | |
| 1692 // Generation of individual instructions | |
| 1693 | |
| 1694 // helpers for generate_and_dispatch | |
| 1695 | |
| 1696 InterpreterGenerator::InterpreterGenerator(StubQueue* code) | |
| 1697 : TemplateInterpreterGenerator(code) { | |
| 1698 generate_all(); // Down here so it can be "virtual". | |
| 1699 } | |
| 1700 | |
| 1701 //----------------------------------------------------------------------------- | |
| 1702 | |
| 1703 // Non-product code | |
| 1704 #ifndef PRODUCT | |
| 1705 address TemplateInterpreterGenerator::generate_trace_code(TosState state) { | |
| 1706 //__ flush_bundle(); | |
| 1707 address entry = __ pc(); | |
| 1708 | |
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1709 const char *bname = NULL; |
| 14694 | 1710 uint tsize = 0; |
| 1711 switch(state) { | |
| 1712 case ftos: | |
| 1713 bname = "trace_code_ftos {"; | |
| 1714 tsize = 2; | |
| 1715 break; | |
| 1716 case btos: | |
| 1717 bname = "trace_code_btos {"; | |
| 1718 tsize = 2; | |
| 1719 break; | |
| 1720 case ctos: | |
| 1721 bname = "trace_code_ctos {"; | |
| 1722 tsize = 2; | |
| 1723 break; | |
| 1724 case stos: | |
| 1725 bname = "trace_code_stos {"; | |
| 1726 tsize = 2; | |
| 1727 break; | |
| 1728 case itos: | |
| 1729 bname = "trace_code_itos {"; | |
| 1730 tsize = 2; | |
| 1731 break; | |
| 1732 case ltos: | |
| 1733 bname = "trace_code_ltos {"; | |
| 1734 tsize = 3; | |
| 1735 break; | |
| 1736 case atos: | |
| 1737 bname = "trace_code_atos {"; | |
| 1738 tsize = 2; | |
| 1739 break; | |
| 1740 case vtos: | |
| 1741 // Note: In case of vtos, the topmost of stack value could be a int or doubl | |
| 1742 // In case of a double (2 slots) we won't see the 2nd stack value. | |
| 1743 // Maybe we simply should print the topmost 3 stack slots to cope with the problem. | |
| 1744 bname = "trace_code_vtos {"; | |
| 1745 tsize = 2; | |
| 1746 | |
| 1747 break; | |
| 1748 case dtos: | |
| 1749 bname = "trace_code_dtos {"; | |
| 1750 tsize = 3; | |
| 1751 break; | |
| 1752 default: | |
| 1753 ShouldNotReachHere(); | |
| 1754 } | |
| 1755 BLOCK_COMMENT(bname); | |
| 1756 | |
| 1757 // Support short-cut for TraceBytecodesAt. | |
| 1758 // Don't call into the VM if we don't want to trace to speed up things. | |
| 1759 Label Lskip_vm_call; | |
| 1760 if (TraceBytecodesAt > 0 && TraceBytecodesAt < max_intx) { | |
| 1761 int offs1 = __ load_const_optimized(R11_scratch1, (address) &TraceBytecodesAt, R0, true); | |
| 1762 int offs2 = __ load_const_optimized(R12_scratch2, (address) &BytecodeCounter::_counter_value, R0, true); | |
| 1763 __ ld(R11_scratch1, offs1, R11_scratch1); | |
| 1764 __ lwa(R12_scratch2, offs2, R12_scratch2); | |
| 1765 __ cmpd(CCR0, R12_scratch2, R11_scratch1); | |
| 1766 __ blt(CCR0, Lskip_vm_call); | |
| 1767 } | |
| 1768 | |
| 1769 __ push(state); | |
| 1770 // Load 2 topmost expression stack values. | |
| 1771 __ ld(R6_ARG4, tsize*Interpreter::stackElementSize, R15_esp); | |
| 1772 __ ld(R5_ARG3, Interpreter::stackElementSize, R15_esp); | |
| 1773 __ mflr(R31); | |
| 1774 __ call_VM(noreg, CAST_FROM_FN_PTR(address, SharedRuntime::trace_bytecode), /* unused */ R4_ARG2, R5_ARG3, R6_ARG4, false); | |
| 1775 __ mtlr(R31); | |
| 1776 __ pop(state); | |
| 1777 | |
| 1778 if (TraceBytecodesAt > 0 && TraceBytecodesAt < max_intx) { | |
| 1779 __ bind(Lskip_vm_call); | |
| 1780 } | |
| 1781 __ blr(); | |
| 1782 BLOCK_COMMENT("} trace_code"); | |
| 1783 return entry; | |
| 1784 } | |
| 1785 | |
| 1786 void TemplateInterpreterGenerator::count_bytecode() { | |
| 1787 int offs = __ load_const_optimized(R11_scratch1, (address) &BytecodeCounter::_counter_value, R12_scratch2, true); | |
| 1788 __ lwz(R12_scratch2, offs, R11_scratch1); | |
| 1789 __ addi(R12_scratch2, R12_scratch2, 1); | |
| 1790 __ stw(R12_scratch2, offs, R11_scratch1); | |
| 1791 } | |
| 1792 | |
| 1793 void TemplateInterpreterGenerator::histogram_bytecode(Template* t) { | |
| 1794 int offs = __ load_const_optimized(R11_scratch1, (address) &BytecodeHistogram::_counters[t->bytecode()], R12_scratch2, true); | |
| 1795 __ lwz(R12_scratch2, offs, R11_scratch1); | |
| 1796 __ addi(R12_scratch2, R12_scratch2, 1); | |
| 1797 __ stw(R12_scratch2, offs, R11_scratch1); | |
| 1798 } | |
| 1799 | |
| 1800 void TemplateInterpreterGenerator::histogram_bytecode_pair(Template* t) { | |
| 1801 const Register addr = R11_scratch1, | |
| 1802 tmp = R12_scratch2; | |
| 1803 // Get index, shift out old bytecode, bring in new bytecode, and store it. | |
| 1804 // _index = (_index >> log2_number_of_codes) | | |
| 1805 // (bytecode << log2_number_of_codes); | |
| 1806 int offs1 = __ load_const_optimized(addr, (address)&BytecodePairHistogram::_index, tmp, true); | |
| 1807 __ lwz(tmp, offs1, addr); | |
| 1808 __ srwi(tmp, tmp, BytecodePairHistogram::log2_number_of_codes); | |
| 1809 __ ori(tmp, tmp, ((int) t->bytecode()) << BytecodePairHistogram::log2_number_of_codes); | |
| 1810 __ stw(tmp, offs1, addr); | |
| 1811 | |
| 1812 // Bump bucket contents. | |
| 1813 // _counters[_index] ++; | |
| 1814 int offs2 = __ load_const_optimized(addr, (address)&BytecodePairHistogram::_counters, R0, true); | |
| 1815 __ sldi(tmp, tmp, LogBytesPerInt); | |
| 1816 __ add(addr, tmp, addr); | |
| 1817 __ lwz(tmp, offs2, addr); | |
| 1818 __ addi(tmp, tmp, 1); | |
| 1819 __ stw(tmp, offs2, addr); | |
| 1820 } | |
| 1821 | |
| 1822 void TemplateInterpreterGenerator::trace_bytecode(Template* t) { | |
| 1823 // Call a little run-time stub to avoid blow-up for each bytecode. | |
| 1824 // The run-time runtime saves the right registers, depending on | |
| 1825 // the tosca in-state for the given template. | |
| 1826 | |
| 1827 assert(Interpreter::trace_code(t->tos_in()) != NULL, | |
| 1828 "entry must have been generated"); | |
| 1829 | |
| 1830 // Note: we destroy LR here. | |
| 1831 __ bl(Interpreter::trace_code(t->tos_in())); | |
| 1832 } | |
| 1833 | |
| 1834 void TemplateInterpreterGenerator::stop_interpreter_at() { | |
| 1835 Label L; | |
| 1836 int offs1 = __ load_const_optimized(R11_scratch1, (address) &StopInterpreterAt, R0, true); | |
| 1837 int offs2 = __ load_const_optimized(R12_scratch2, (address) &BytecodeCounter::_counter_value, R0, true); | |
| 1838 __ ld(R11_scratch1, offs1, R11_scratch1); | |
| 1839 __ lwa(R12_scratch2, offs2, R12_scratch2); | |
| 1840 __ cmpd(CCR0, R12_scratch2, R11_scratch1); | |
| 1841 __ bne(CCR0, L); | |
| 1842 __ illtrap(); | |
| 1843 __ bind(L); | |
| 1844 } | |
| 1845 | |
| 1846 #endif // !PRODUCT | |
| 1847 #endif // !CC_INTERP |