Mercurial > hg > truffle
annotate src/cpu/sparc/vm/templateInterpreter_sparc.cpp @ 4743:dca455dea3a7
7116216: StackOverflow GC crash
Summary: GC crash for explicit stack overflow checks after a C2I transition.
Reviewed-by: coleenp, never
Contributed-by: yang02.wang@sap.com, bertrand.delsart@oracle.com
| author | bdelsart |
|---|---|
| date | Tue, 20 Dec 2011 12:33:05 +0100 |
| parents | 3d42f82cd811 |
| children | 22cee0ee8927 |
| rev | line source |
|---|---|
| 0 | 1 /* |
|
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2 * Copyright (c) 1997, 2011, 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 "asm/assembler.hpp" | |
| 27 #include "interpreter/bytecodeHistogram.hpp" | |
| 28 #include "interpreter/interpreter.hpp" | |
| 29 #include "interpreter/interpreterGenerator.hpp" | |
| 30 #include "interpreter/interpreterRuntime.hpp" | |
| 31 #include "interpreter/templateTable.hpp" | |
| 32 #include "oops/arrayOop.hpp" | |
| 33 #include "oops/methodDataOop.hpp" | |
| 34 #include "oops/methodOop.hpp" | |
| 35 #include "oops/oop.inline.hpp" | |
| 36 #include "prims/jvmtiExport.hpp" | |
| 37 #include "prims/jvmtiThreadState.hpp" | |
| 38 #include "runtime/arguments.hpp" | |
| 39 #include "runtime/deoptimization.hpp" | |
| 40 #include "runtime/frame.inline.hpp" | |
| 41 #include "runtime/sharedRuntime.hpp" | |
| 42 #include "runtime/stubRoutines.hpp" | |
| 43 #include "runtime/synchronizer.hpp" | |
| 44 #include "runtime/timer.hpp" | |
| 45 #include "runtime/vframeArray.hpp" | |
| 46 #include "utilities/debug.hpp" | |
| 0 | 47 |
| 48 #ifndef CC_INTERP | |
| 49 #ifndef FAST_DISPATCH | |
| 50 #define FAST_DISPATCH 1 | |
| 51 #endif | |
| 52 #undef FAST_DISPATCH | |
| 53 | |
| 54 | |
| 55 // Generation of Interpreter | |
| 56 // | |
| 57 // The InterpreterGenerator generates the interpreter into Interpreter::_code. | |
| 58 | |
| 59 | |
| 60 #define __ _masm-> | |
| 61 | |
| 62 | |
| 63 //---------------------------------------------------------------------------------------------------- | |
| 64 | |
| 65 | |
| 66 void InterpreterGenerator::save_native_result(void) { | |
| 67 // result potentially in O0/O1: save it across calls | |
| 68 const Address& l_tmp = InterpreterMacroAssembler::l_tmp; | |
| 69 | |
| 70 // result potentially in F0/F1: save it across calls | |
| 71 const Address& d_tmp = InterpreterMacroAssembler::d_tmp; | |
| 72 | |
| 73 // save and restore any potential method result value around the unlocking operation | |
| 74 __ stf(FloatRegisterImpl::D, F0, d_tmp); | |
| 75 #ifdef _LP64 | |
| 76 __ stx(O0, l_tmp); | |
| 77 #else | |
| 78 __ std(O0, l_tmp); | |
| 79 #endif | |
| 80 } | |
| 81 | |
| 82 void InterpreterGenerator::restore_native_result(void) { | |
| 83 const Address& l_tmp = InterpreterMacroAssembler::l_tmp; | |
| 84 const Address& d_tmp = InterpreterMacroAssembler::d_tmp; | |
| 85 | |
| 86 // Restore any method result value | |
| 87 __ ldf(FloatRegisterImpl::D, d_tmp, F0); | |
| 88 #ifdef _LP64 | |
| 89 __ ldx(l_tmp, O0); | |
| 90 #else | |
| 91 __ ldd(l_tmp, O0); | |
| 92 #endif | |
| 93 } | |
| 94 | |
| 95 address TemplateInterpreterGenerator::generate_exception_handler_common(const char* name, const char* message, bool pass_oop) { | |
| 96 assert(!pass_oop || message == NULL, "either oop or message but not both"); | |
| 97 address entry = __ pc(); | |
| 98 // expression stack must be empty before entering the VM if an exception happened | |
| 99 __ empty_expression_stack(); | |
| 100 // load exception object | |
| 101 __ set((intptr_t)name, G3_scratch); | |
| 102 if (pass_oop) { | |
| 103 __ call_VM(Oexception, CAST_FROM_FN_PTR(address, InterpreterRuntime::create_klass_exception), G3_scratch, Otos_i); | |
| 104 } else { | |
| 105 __ set((intptr_t)message, G4_scratch); | |
| 106 __ call_VM(Oexception, CAST_FROM_FN_PTR(address, InterpreterRuntime::create_exception), G3_scratch, G4_scratch); | |
| 107 } | |
| 108 // throw exception | |
| 109 assert(Interpreter::throw_exception_entry() != NULL, "generate it first"); | |
| 727 | 110 AddressLiteral thrower(Interpreter::throw_exception_entry()); |
| 111 __ jump_to(thrower, G3_scratch); | |
| 0 | 112 __ delayed()->nop(); |
| 113 return entry; | |
| 114 } | |
| 115 | |
| 116 address TemplateInterpreterGenerator::generate_ClassCastException_handler() { | |
| 117 address entry = __ pc(); | |
| 118 // expression stack must be empty before entering the VM if an exception | |
| 119 // happened | |
| 120 __ empty_expression_stack(); | |
| 121 // load exception object | |
| 122 __ call_VM(Oexception, | |
| 123 CAST_FROM_FN_PTR(address, | |
| 124 InterpreterRuntime::throw_ClassCastException), | |
| 125 Otos_i); | |
| 126 __ should_not_reach_here(); | |
| 127 return entry; | |
| 128 } | |
| 129 | |
| 130 | |
| 131 address TemplateInterpreterGenerator::generate_ArrayIndexOutOfBounds_handler(const char* name) { | |
| 132 address entry = __ pc(); | |
| 133 // expression stack must be empty before entering the VM if an exception happened | |
| 134 __ empty_expression_stack(); | |
| 135 // convention: expect aberrant index in register G3_scratch, then shuffle the | |
| 136 // index to G4_scratch for the VM call | |
| 137 __ mov(G3_scratch, G4_scratch); | |
| 138 __ set((intptr_t)name, G3_scratch); | |
| 139 __ call_VM(Oexception, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_ArrayIndexOutOfBoundsException), G3_scratch, G4_scratch); | |
| 140 __ should_not_reach_here(); | |
| 141 return entry; | |
| 142 } | |
| 143 | |
| 144 | |
| 145 address TemplateInterpreterGenerator::generate_StackOverflowError_handler() { | |
| 146 address entry = __ pc(); | |
| 147 // expression stack must be empty before entering the VM if an exception happened | |
| 148 __ empty_expression_stack(); | |
| 149 __ call_VM(Oexception, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_StackOverflowError)); | |
| 150 __ should_not_reach_here(); | |
| 151 return entry; | |
| 152 } | |
| 153 | |
| 154 | |
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155 address TemplateInterpreterGenerator::generate_return_entry_for(TosState state, int step) { |
| 1503 | 156 TosState incoming_state = state; |
| 157 | |
| 158 Label cont; | |
| 0 | 159 address compiled_entry = __ pc(); |
| 160 | |
| 161 address entry = __ pc(); | |
| 162 #if !defined(_LP64) && defined(COMPILER2) | |
| 163 // All return values are where we want them, except for Longs. C2 returns | |
| 164 // longs in G1 in the 32-bit build whereas the interpreter wants them in O0/O1. | |
| 165 // Since the interpreter will return longs in G1 and O0/O1 in the 32bit | |
| 166 // build even if we are returning from interpreted we just do a little | |
| 167 // stupid shuffing. | |
| 168 // Note: I tried to make c2 return longs in O0/O1 and G1 so we wouldn't have to | |
| 169 // do this here. Unfortunately if we did a rethrow we'd see an machepilog node | |
| 170 // first which would move g1 -> O0/O1 and destroy the exception we were throwing. | |
| 171 | |
| 1503 | 172 if (incoming_state == ltos) { |
| 173 __ srl (G1, 0, O1); | |
| 174 __ srlx(G1, 32, O0); | |
| 0 | 175 } |
| 1503 | 176 #endif // !_LP64 && COMPILER2 |
| 0 | 177 |
| 178 __ bind(cont); | |
| 179 | |
| 180 // The callee returns with the stack possibly adjusted by adapter transition | |
| 181 // We remove that possible adjustment here. | |
| 182 // All interpreter local registers are untouched. Any result is passed back | |
| 183 // in the O0/O1 or float registers. Before continuing, the arguments must be | |
| 184 // popped from the java expression stack; i.e., Lesp must be adjusted. | |
| 185 | |
| 186 __ mov(Llast_SP, SP); // Remove any adapter added stack space. | |
| 187 | |
| 1503 | 188 Label L_got_cache, L_giant_index; |
| 0 | 189 const Register cache = G3_scratch; |
| 190 const Register size = G1_scratch; | |
| 1503 | 191 if (EnableInvokeDynamic) { |
| 192 __ ldub(Address(Lbcp, 0), G1_scratch); // Load current bytecode. | |
| 3839 | 193 __ cmp_and_br_short(G1_scratch, Bytecodes::_invokedynamic, Assembler::equal, Assembler::pn, L_giant_index); |
| 1503 | 194 } |
| 0 | 195 __ get_cache_and_index_at_bcp(cache, G1_scratch, 1); |
| 1503 | 196 __ bind(L_got_cache); |
| 727 | 197 __ ld_ptr(cache, constantPoolCacheOopDesc::base_offset() + |
| 198 ConstantPoolCacheEntry::flags_offset(), size); | |
| 0 | 199 __ and3(size, 0xFF, size); // argument size in words |
| 1506 | 200 __ sll(size, Interpreter::logStackElementSize, size); // each argument size in bytes |
| 0 | 201 __ add(Lesp, size, Lesp); // pop arguments |
| 202 __ dispatch_next(state, step); | |
| 203 | |
| 1503 | 204 // out of the main line of code... |
| 205 if (EnableInvokeDynamic) { | |
| 206 __ bind(L_giant_index); | |
| 1565 | 207 __ get_cache_and_index_at_bcp(cache, G1_scratch, 1, sizeof(u4)); |
| 3839 | 208 __ ba_short(L_got_cache); |
| 1503 | 209 } |
| 210 | |
| 0 | 211 return entry; |
| 212 } | |
| 213 | |
| 214 | |
| 215 address TemplateInterpreterGenerator::generate_deopt_entry_for(TosState state, int step) { | |
| 216 address entry = __ pc(); | |
| 217 __ get_constant_pool_cache(LcpoolCache); // load LcpoolCache | |
| 218 { Label L; | |
| 727 | 219 Address exception_addr(G2_thread, Thread::pending_exception_offset()); |
| 220 __ ld_ptr(exception_addr, Gtemp); // Load pending exception. | |
| 3839 | 221 __ br_null_short(Gtemp, Assembler::pt, L); |
| 0 | 222 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_pending_exception)); |
| 223 __ should_not_reach_here(); | |
| 224 __ bind(L); | |
| 225 } | |
| 226 __ dispatch_next(state, step); | |
| 227 return entry; | |
| 228 } | |
| 229 | |
| 230 // A result handler converts/unboxes a native call result into | |
| 231 // a java interpreter/compiler result. The current frame is an | |
| 232 // interpreter frame. The activation frame unwind code must be | |
| 233 // consistent with that of TemplateTable::_return(...). In the | |
| 234 // case of native methods, the caller's SP was not modified. | |
| 235 address TemplateInterpreterGenerator::generate_result_handler_for(BasicType type) { | |
| 236 address entry = __ pc(); | |
| 237 Register Itos_i = Otos_i ->after_save(); | |
| 238 Register Itos_l = Otos_l ->after_save(); | |
| 239 Register Itos_l1 = Otos_l1->after_save(); | |
| 240 Register Itos_l2 = Otos_l2->after_save(); | |
| 241 switch (type) { | |
| 242 case T_BOOLEAN: __ subcc(G0, O0, G0); __ addc(G0, 0, Itos_i); break; // !0 => true; 0 => false | |
| 243 case T_CHAR : __ sll(O0, 16, O0); __ srl(O0, 16, Itos_i); break; // cannot use and3, 0xFFFF too big as immediate value! | |
| 244 case T_BYTE : __ sll(O0, 24, O0); __ sra(O0, 24, Itos_i); break; | |
| 245 case T_SHORT : __ sll(O0, 16, O0); __ sra(O0, 16, Itos_i); break; | |
| 246 case T_LONG : | |
| 247 #ifndef _LP64 | |
| 248 __ mov(O1, Itos_l2); // move other half of long | |
| 249 #endif // ifdef or no ifdef, fall through to the T_INT case | |
| 250 case T_INT : __ mov(O0, Itos_i); break; | |
| 251 case T_VOID : /* nothing to do */ break; | |
| 252 case T_FLOAT : assert(F0 == Ftos_f, "fix this code" ); break; | |
| 253 case T_DOUBLE : assert(F0 == Ftos_d, "fix this code" ); break; | |
| 254 case T_OBJECT : | |
| 255 __ ld_ptr(FP, (frame::interpreter_frame_oop_temp_offset*wordSize) + STACK_BIAS, Itos_i); | |
| 256 __ verify_oop(Itos_i); | |
| 257 break; | |
| 258 default : ShouldNotReachHere(); | |
| 259 } | |
| 260 __ ret(); // return from interpreter activation | |
| 261 __ delayed()->restore(I5_savedSP, G0, SP); // remove interpreter frame | |
| 262 NOT_PRODUCT(__ emit_long(0);) // marker for disassembly | |
| 263 return entry; | |
| 264 } | |
| 265 | |
| 266 address TemplateInterpreterGenerator::generate_safept_entry_for(TosState state, address runtime_entry) { | |
| 267 address entry = __ pc(); | |
| 268 __ push(state); | |
| 269 __ call_VM(noreg, runtime_entry); | |
| 270 __ dispatch_via(vtos, Interpreter::normal_table(vtos)); | |
| 271 return entry; | |
| 272 } | |
| 273 | |
| 274 | |
| 275 address TemplateInterpreterGenerator::generate_continuation_for(TosState state) { | |
| 276 address entry = __ pc(); | |
| 277 __ dispatch_next(state); | |
| 278 return entry; | |
| 279 } | |
| 280 | |
| 281 // | |
| 282 // Helpers for commoning out cases in the various type of method entries. | |
| 283 // | |
| 284 | |
| 285 // increment invocation count & check for overflow | |
| 286 // | |
| 287 // Note: checking for negative value instead of overflow | |
| 288 // so we have a 'sticky' overflow test | |
| 289 // | |
| 290 // Lmethod: method | |
| 291 // ??: invocation counter | |
| 292 // | |
| 293 void InterpreterGenerator::generate_counter_incr(Label* overflow, Label* profile_method, Label* profile_method_continue) { | |
| 1783 | 294 // Note: In tiered we increment either counters in methodOop or in MDO depending if we're profiling or not. |
| 295 if (TieredCompilation) { | |
| 296 const int increment = InvocationCounter::count_increment; | |
| 297 const int mask = ((1 << Tier0InvokeNotifyFreqLog) - 1) << InvocationCounter::count_shift; | |
| 298 Label no_mdo, done; | |
| 299 if (ProfileInterpreter) { | |
| 300 // If no method data exists, go to profile_continue. | |
| 301 __ ld_ptr(Lmethod, methodOopDesc::method_data_offset(), G4_scratch); | |
| 3839 | 302 __ br_null_short(G4_scratch, Assembler::pn, no_mdo); |
| 1783 | 303 // Increment counter |
| 304 Address mdo_invocation_counter(G4_scratch, | |
| 305 in_bytes(methodDataOopDesc::invocation_counter_offset()) + | |
| 306 in_bytes(InvocationCounter::counter_offset())); | |
| 307 __ increment_mask_and_jump(mdo_invocation_counter, increment, mask, | |
| 308 G3_scratch, Lscratch, | |
| 309 Assembler::zero, overflow); | |
| 3839 | 310 __ ba_short(done); |
| 1783 | 311 } |
| 0 | 312 |
| 1783 | 313 // Increment counter in methodOop |
| 314 __ bind(no_mdo); | |
| 315 Address invocation_counter(Lmethod, | |
| 316 in_bytes(methodOopDesc::invocation_counter_offset()) + | |
| 317 in_bytes(InvocationCounter::counter_offset())); | |
| 318 __ increment_mask_and_jump(invocation_counter, increment, mask, | |
| 319 G3_scratch, Lscratch, | |
| 320 Assembler::zero, overflow); | |
| 321 __ bind(done); | |
| 322 } else { | |
| 323 // Update standard invocation counters | |
| 324 __ increment_invocation_counter(O0, G3_scratch); | |
| 325 if (ProfileInterpreter) { // %%% Merge this into methodDataOop | |
| 326 Address interpreter_invocation_counter(Lmethod,in_bytes(methodOopDesc::interpreter_invocation_counter_offset())); | |
| 327 __ ld(interpreter_invocation_counter, G3_scratch); | |
| 328 __ inc(G3_scratch); | |
| 329 __ st(G3_scratch, interpreter_invocation_counter); | |
| 330 } | |
| 0 | 331 |
| 1783 | 332 if (ProfileInterpreter && profile_method != NULL) { |
| 333 // Test to see if we should create a method data oop | |
| 334 AddressLiteral profile_limit((address)&InvocationCounter::InterpreterProfileLimit); | |
| 335 __ load_contents(profile_limit, G3_scratch); | |
| 3839 | 336 __ cmp_and_br_short(O0, G3_scratch, Assembler::lessUnsigned, Assembler::pn, *profile_method_continue); |
| 0 | 337 |
| 1783 | 338 // if no method data exists, go to profile_method |
| 339 __ test_method_data_pointer(*profile_method); | |
| 340 } | |
| 341 | |
| 342 AddressLiteral invocation_limit((address)&InvocationCounter::InterpreterInvocationLimit); | |
| 343 __ load_contents(invocation_limit, G3_scratch); | |
| 344 __ cmp(O0, G3_scratch); | |
| 3839 | 345 __ br(Assembler::greaterEqualUnsigned, false, Assembler::pn, *overflow); // Far distance |
| 1783 | 346 __ delayed()->nop(); |
| 347 } | |
| 0 | 348 |
| 349 } | |
| 350 | |
| 351 // Allocate monitor and lock method (asm interpreter) | |
| 352 // ebx - methodOop | |
| 353 // | |
| 354 void InterpreterGenerator::lock_method(void) { | |
| 727 | 355 __ ld(Lmethod, in_bytes(methodOopDesc::access_flags_offset()), O0); // Load access flags. |
| 0 | 356 |
| 357 #ifdef ASSERT | |
| 358 { Label ok; | |
| 359 __ btst(JVM_ACC_SYNCHRONIZED, O0); | |
| 360 __ br( Assembler::notZero, false, Assembler::pt, ok); | |
| 361 __ delayed()->nop(); | |
| 362 __ stop("method doesn't need synchronization"); | |
| 363 __ bind(ok); | |
| 364 } | |
| 365 #endif // ASSERT | |
| 366 | |
| 367 // get synchronization object to O0 | |
| 368 { Label done; | |
| 369 const int mirror_offset = klassOopDesc::klass_part_offset_in_bytes() + Klass::java_mirror_offset_in_bytes(); | |
| 370 __ btst(JVM_ACC_STATIC, O0); | |
| 371 __ br( Assembler::zero, true, Assembler::pt, done); | |
| 372 __ delayed()->ld_ptr(Llocals, Interpreter::local_offset_in_bytes(0), O0); // get receiver for not-static case | |
| 373 | |
| 374 __ ld_ptr( Lmethod, in_bytes(methodOopDesc::constants_offset()), O0); | |
| 375 __ ld_ptr( O0, constantPoolOopDesc::pool_holder_offset_in_bytes(), O0); | |
| 376 | |
| 377 // lock the mirror, not the klassOop | |
| 378 __ ld_ptr( O0, mirror_offset, O0); | |
| 379 | |
| 380 #ifdef ASSERT | |
| 381 __ tst(O0); | |
| 382 __ breakpoint_trap(Assembler::zero); | |
| 383 #endif // ASSERT | |
| 384 | |
| 385 __ bind(done); | |
| 386 } | |
| 387 | |
| 388 __ add_monitor_to_stack(true, noreg, noreg); // allocate monitor elem | |
| 389 __ st_ptr( O0, Lmonitors, BasicObjectLock::obj_offset_in_bytes()); // store object | |
| 390 // __ untested("lock_object from method entry"); | |
| 391 __ lock_object(Lmonitors, O0); | |
| 392 } | |
| 393 | |
| 394 | |
| 395 void TemplateInterpreterGenerator::generate_stack_overflow_check(Register Rframe_size, | |
| 396 Register Rscratch, | |
| 397 Register Rscratch2) { | |
| 398 const int page_size = os::vm_page_size(); | |
| 399 Label after_frame_check; | |
| 400 | |
| 401 assert_different_registers(Rframe_size, Rscratch, Rscratch2); | |
| 402 | |
| 3839 | 403 __ set(page_size, Rscratch); |
| 404 __ cmp_and_br_short(Rframe_size, Rscratch, Assembler::lessEqual, Assembler::pt, after_frame_check); | |
| 0 | 405 |
| 406 // get the stack base, and in debug, verify it is non-zero | |
| 727 | 407 __ ld_ptr( G2_thread, Thread::stack_base_offset(), Rscratch ); |
| 0 | 408 #ifdef ASSERT |
| 409 Label base_not_zero; | |
| 3839 | 410 __ br_notnull_short(Rscratch, Assembler::pn, base_not_zero); |
| 0 | 411 __ stop("stack base is zero in generate_stack_overflow_check"); |
| 412 __ bind(base_not_zero); | |
| 413 #endif | |
| 414 | |
| 415 // get the stack size, and in debug, verify it is non-zero | |
| 416 assert( sizeof(size_t) == sizeof(intptr_t), "wrong load size" ); | |
| 727 | 417 __ ld_ptr( G2_thread, Thread::stack_size_offset(), Rscratch2 ); |
| 0 | 418 #ifdef ASSERT |
| 419 Label size_not_zero; | |
| 3839 | 420 __ br_notnull_short(Rscratch2, Assembler::pn, size_not_zero); |
| 0 | 421 __ stop("stack size is zero in generate_stack_overflow_check"); |
| 422 __ bind(size_not_zero); | |
| 423 #endif | |
| 424 | |
| 425 // compute the beginning of the protected zone minus the requested frame size | |
| 426 __ sub( Rscratch, Rscratch2, Rscratch ); | |
| 427 __ set( (StackRedPages+StackYellowPages) * page_size, Rscratch2 ); | |
| 428 __ add( Rscratch, Rscratch2, Rscratch ); | |
| 429 | |
| 430 // Add in the size of the frame (which is the same as subtracting it from the | |
| 431 // SP, which would take another register | |
| 432 __ add( Rscratch, Rframe_size, Rscratch ); | |
| 433 | |
| 434 // the frame is greater than one page in size, so check against | |
| 435 // the bottom of the stack | |
| 3839 | 436 __ cmp_and_brx_short(SP, Rscratch, Assembler::greater, Assembler::pt, after_frame_check); |
| 0 | 437 |
| 4743 | 438 // the stack will overflow, throw an exception |
| 439 | |
| 440 // Note that SP is restored to sender's sp (in the delay slot). This | |
| 441 // is necessary if the sender's frame is an extended compiled frame | |
| 442 // (see gen_c2i_adapter()) and safer anyway in case of JSR292 | |
| 443 // adaptations. | |
| 0 | 444 |
| 4743 | 445 // Note also that the restored frame is not necessarily interpreted. |
| 446 // Use the shared runtime version of the StackOverflowError. | |
| 447 assert(StubRoutines::throw_StackOverflowError_entry() != NULL, "stub not yet generated"); | |
| 448 AddressLiteral stub(StubRoutines::throw_StackOverflowError_entry()); | |
| 449 __ jump_to(stub, Rscratch); | |
| 450 __ delayed()->mov(O5_savedSP, SP); | |
| 0 | 451 |
| 452 // if you get to here, then there is enough stack space | |
| 453 __ bind( after_frame_check ); | |
| 454 } | |
| 455 | |
| 456 | |
| 457 // | |
| 458 // Generate a fixed interpreter frame. This is identical setup for interpreted | |
| 459 // methods and for native methods hence the shared code. | |
| 460 | |
| 461 void TemplateInterpreterGenerator::generate_fixed_frame(bool native_call) { | |
| 462 // | |
| 463 // | |
| 464 // The entry code sets up a new interpreter frame in 4 steps: | |
| 465 // | |
| 466 // 1) Increase caller's SP by for the extra local space needed: | |
| 467 // (check for overflow) | |
| 468 // Efficient implementation of xload/xstore bytecodes requires | |
| 469 // that arguments and non-argument locals are in a contigously | |
| 470 // addressable memory block => non-argument locals must be | |
| 471 // allocated in the caller's frame. | |
| 472 // | |
| 473 // 2) Create a new stack frame and register window: | |
| 474 // The new stack frame must provide space for the standard | |
| 475 // register save area, the maximum java expression stack size, | |
| 476 // the monitor slots (0 slots initially), and some frame local | |
| 477 // scratch locations. | |
| 478 // | |
| 479 // 3) The following interpreter activation registers must be setup: | |
| 480 // Lesp : expression stack pointer | |
| 481 // Lbcp : bytecode pointer | |
| 482 // Lmethod : method | |
| 483 // Llocals : locals pointer | |
| 484 // Lmonitors : monitor pointer | |
| 485 // LcpoolCache: constant pool cache | |
| 486 // | |
| 487 // 4) Initialize the non-argument locals if necessary: | |
| 488 // Non-argument locals may need to be initialized to NULL | |
| 489 // for GC to work. If the oop-map information is accurate | |
| 490 // (in the absence of the JSR problem), no initialization | |
| 491 // is necessary. | |
| 492 // | |
| 493 // (gri - 2/25/2000) | |
| 494 | |
| 495 | |
| 727 | 496 const Address size_of_parameters(G5_method, methodOopDesc::size_of_parameters_offset()); |
| 497 const Address size_of_locals (G5_method, methodOopDesc::size_of_locals_offset()); | |
| 498 const Address max_stack (G5_method, methodOopDesc::max_stack_offset()); | |
| 0 | 499 int rounded_vm_local_words = round_to( frame::interpreter_frame_vm_local_words, WordsPerLong ); |
| 500 | |
| 501 const int extra_space = | |
| 502 rounded_vm_local_words + // frame local scratch space | |
| 710 | 503 //6815692//methodOopDesc::extra_stack_words() + // extra push slots for MH adapters |
| 0 | 504 frame::memory_parameter_word_sp_offset + // register save area |
| 505 (native_call ? frame::interpreter_frame_extra_outgoing_argument_words : 0); | |
| 506 | |
| 507 const Register Glocals_size = G3; | |
| 508 const Register Otmp1 = O3; | |
| 509 const Register Otmp2 = O4; | |
| 510 // Lscratch can't be used as a temporary because the call_stub uses | |
| 511 // it to assert that the stack frame was setup correctly. | |
| 512 | |
| 513 __ lduh( size_of_parameters, Glocals_size); | |
| 514 | |
| 515 // Gargs points to first local + BytesPerWord | |
| 516 // Set the saved SP after the register window save | |
| 517 // | |
| 518 assert_different_registers(Gargs, Glocals_size, Gframe_size, O5_savedSP); | |
| 1506 | 519 __ sll(Glocals_size, Interpreter::logStackElementSize, Otmp1); |
| 0 | 520 __ add(Gargs, Otmp1, Gargs); |
| 521 | |
| 522 if (native_call) { | |
| 523 __ calc_mem_param_words( Glocals_size, Gframe_size ); | |
| 524 __ add( Gframe_size, extra_space, Gframe_size); | |
| 525 __ round_to( Gframe_size, WordsPerLong ); | |
| 526 __ sll( Gframe_size, LogBytesPerWord, Gframe_size ); | |
| 527 } else { | |
| 528 | |
| 529 // | |
| 530 // Compute number of locals in method apart from incoming parameters | |
| 531 // | |
| 532 __ lduh( size_of_locals, Otmp1 ); | |
| 533 __ sub( Otmp1, Glocals_size, Glocals_size ); | |
| 534 __ round_to( Glocals_size, WordsPerLong ); | |
| 1506 | 535 __ sll( Glocals_size, Interpreter::logStackElementSize, Glocals_size ); |
| 0 | 536 |
| 537 // see if the frame is greater than one page in size. If so, | |
| 538 // then we need to verify there is enough stack space remaining | |
| 539 // Frame_size = (max_stack + extra_space) * BytesPerWord; | |
| 540 __ lduh( max_stack, Gframe_size ); | |
| 541 __ add( Gframe_size, extra_space, Gframe_size ); | |
| 542 __ round_to( Gframe_size, WordsPerLong ); | |
| 1506 | 543 __ sll( Gframe_size, Interpreter::logStackElementSize, Gframe_size); |
| 0 | 544 |
| 545 // Add in java locals size for stack overflow check only | |
| 546 __ add( Gframe_size, Glocals_size, Gframe_size ); | |
| 547 | |
| 548 const Register Otmp2 = O4; | |
| 549 assert_different_registers(Otmp1, Otmp2, O5_savedSP); | |
| 550 generate_stack_overflow_check(Gframe_size, Otmp1, Otmp2); | |
| 551 | |
| 552 __ sub( Gframe_size, Glocals_size, Gframe_size); | |
| 553 | |
| 554 // | |
| 555 // bump SP to accomodate the extra locals | |
| 556 // | |
| 557 __ sub( SP, Glocals_size, SP ); | |
| 558 } | |
| 559 | |
| 560 // | |
| 561 // now set up a stack frame with the size computed above | |
| 562 // | |
| 563 __ neg( Gframe_size ); | |
| 564 __ save( SP, Gframe_size, SP ); | |
| 565 | |
| 566 // | |
| 567 // now set up all the local cache registers | |
| 568 // | |
| 569 // NOTE: At this point, Lbyte_code/Lscratch has been modified. Note | |
| 570 // that all present references to Lbyte_code initialize the register | |
| 571 // immediately before use | |
| 572 if (native_call) { | |
| 573 __ mov(G0, Lbcp); | |
| 574 } else { | |
| 727 | 575 __ ld_ptr(G5_method, methodOopDesc::const_offset(), Lbcp); |
| 576 __ add(Lbcp, in_bytes(constMethodOopDesc::codes_offset()), Lbcp); | |
| 0 | 577 } |
| 578 __ mov( G5_method, Lmethod); // set Lmethod | |
| 579 __ get_constant_pool_cache( LcpoolCache ); // set LcpoolCache | |
| 580 __ sub(FP, rounded_vm_local_words * BytesPerWord, Lmonitors ); // set Lmonitors | |
| 581 #ifdef _LP64 | |
| 582 __ add( Lmonitors, STACK_BIAS, Lmonitors ); // Account for 64 bit stack bias | |
| 583 #endif | |
| 584 __ sub(Lmonitors, BytesPerWord, Lesp); // set Lesp | |
| 585 | |
| 586 // setup interpreter activation registers | |
| 587 __ sub(Gargs, BytesPerWord, Llocals); // set Llocals | |
| 588 | |
| 589 if (ProfileInterpreter) { | |
| 590 #ifdef FAST_DISPATCH | |
| 591 // FAST_DISPATCH and ProfileInterpreter are mutually exclusive since | |
| 592 // they both use I2. | |
| 593 assert(0, "FAST_DISPATCH and +ProfileInterpreter are mutually exclusive"); | |
| 594 #endif // FAST_DISPATCH | |
| 595 __ set_method_data_pointer(); | |
| 596 } | |
| 597 | |
| 598 } | |
| 599 | |
| 600 // Empty method, generate a very fast return. | |
| 601 | |
| 602 address InterpreterGenerator::generate_empty_entry(void) { | |
| 603 | |
| 604 // A method that does nother but return... | |
| 605 | |
| 606 address entry = __ pc(); | |
| 607 Label slow_path; | |
| 608 | |
| 609 __ verify_oop(G5_method); | |
| 610 | |
| 611 // do nothing for empty methods (do not even increment invocation counter) | |
| 612 if ( UseFastEmptyMethods) { | |
| 613 // If we need a safepoint check, generate full interpreter entry. | |
| 727 | 614 AddressLiteral sync_state(SafepointSynchronize::address_of_state()); |
| 615 __ set(sync_state, G3_scratch); | |
| 3839 | 616 __ cmp_and_br_short(G3_scratch, SafepointSynchronize::_not_synchronized, Assembler::notEqual, Assembler::pn, slow_path); |
| 0 | 617 |
| 618 // Code: _return | |
| 619 __ retl(); | |
| 620 __ delayed()->mov(O5_savedSP, SP); | |
| 621 | |
| 622 __ bind(slow_path); | |
| 623 (void) generate_normal_entry(false); | |
| 624 | |
| 625 return entry; | |
| 626 } | |
| 627 return NULL; | |
| 628 } | |
| 629 | |
| 630 // Call an accessor method (assuming it is resolved, otherwise drop into | |
| 631 // vanilla (slow path) entry | |
| 632 | |
| 633 // Generates code to elide accessor methods | |
| 634 // Uses G3_scratch and G1_scratch as scratch | |
| 635 address InterpreterGenerator::generate_accessor_entry(void) { | |
| 636 | |
| 637 // Code: _aload_0, _(i|a)getfield, _(i|a)return or any rewrites thereof; | |
| 638 // parameter size = 1 | |
| 639 // Note: We can only use this code if the getfield has been resolved | |
| 640 // and if we don't have a null-pointer exception => check for | |
| 641 // these conditions first and use slow path if necessary. | |
| 642 address entry = __ pc(); | |
| 643 Label slow_path; | |
| 644 | |
|
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645 |
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646 // XXX: for compressed oops pointer loading and decoding doesn't fit in |
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647 // delay slot and damages G1 |
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648 if ( UseFastAccessorMethods && !UseCompressedOops ) { |
| 0 | 649 // Check if we need to reach a safepoint and generate full interpreter |
| 650 // frame if so. | |
| 727 | 651 AddressLiteral sync_state(SafepointSynchronize::address_of_state()); |
| 0 | 652 __ load_contents(sync_state, G3_scratch); |
| 653 __ cmp(G3_scratch, SafepointSynchronize::_not_synchronized); | |
| 3839 | 654 __ cmp_and_br_short(G3_scratch, SafepointSynchronize::_not_synchronized, Assembler::notEqual, Assembler::pn, slow_path); |
| 0 | 655 |
| 656 // Check if local 0 != NULL | |
| 657 __ ld_ptr(Gargs, G0, Otos_i ); // get local 0 | |
| 3839 | 658 // check if local 0 == NULL and go the slow path |
| 659 __ br_null_short(Otos_i, Assembler::pn, slow_path); | |
| 0 | 660 |
| 661 | |
| 662 // read first instruction word and extract bytecode @ 1 and index @ 2 | |
| 663 // get first 4 bytes of the bytecodes (big endian!) | |
| 727 | 664 __ ld_ptr(G5_method, methodOopDesc::const_offset(), G1_scratch); |
| 665 __ ld(G1_scratch, constMethodOopDesc::codes_offset(), G1_scratch); | |
| 0 | 666 |
| 667 // move index @ 2 far left then to the right most two bytes. | |
| 668 __ sll(G1_scratch, 2*BitsPerByte, G1_scratch); | |
| 669 __ srl(G1_scratch, 2*BitsPerByte - exact_log2(in_words( | |
| 670 ConstantPoolCacheEntry::size()) * BytesPerWord), G1_scratch); | |
| 671 | |
| 672 // get constant pool cache | |
| 727 | 673 __ ld_ptr(G5_method, methodOopDesc::constants_offset(), G3_scratch); |
| 0 | 674 __ ld_ptr(G3_scratch, constantPoolOopDesc::cache_offset_in_bytes(), G3_scratch); |
| 675 | |
| 676 // get specific constant pool cache entry | |
| 677 __ add(G3_scratch, G1_scratch, G3_scratch); | |
| 678 | |
| 679 // Check the constant Pool cache entry to see if it has been resolved. | |
| 680 // If not, need the slow path. | |
| 681 ByteSize cp_base_offset = constantPoolCacheOopDesc::base_offset(); | |
| 727 | 682 __ ld_ptr(G3_scratch, cp_base_offset + ConstantPoolCacheEntry::indices_offset(), G1_scratch); |
| 0 | 683 __ srl(G1_scratch, 2*BitsPerByte, G1_scratch); |
| 684 __ and3(G1_scratch, 0xFF, G1_scratch); | |
| 3839 | 685 __ cmp_and_br_short(G1_scratch, Bytecodes::_getfield, Assembler::notEqual, Assembler::pn, slow_path); |
| 0 | 686 |
| 687 // Get the type and return field offset from the constant pool cache | |
| 727 | 688 __ ld_ptr(G3_scratch, cp_base_offset + ConstantPoolCacheEntry::flags_offset(), G1_scratch); |
| 689 __ ld_ptr(G3_scratch, cp_base_offset + ConstantPoolCacheEntry::f2_offset(), G3_scratch); | |
| 0 | 690 |
| 691 Label xreturn_path; | |
| 692 // Need to differentiate between igetfield, agetfield, bgetfield etc. | |
| 693 // because they are different sizes. | |
| 694 // Get the type from the constant pool cache | |
| 695 __ srl(G1_scratch, ConstantPoolCacheEntry::tosBits, G1_scratch); | |
| 696 // Make sure we don't need to mask G1_scratch for tosBits after the above shift | |
| 697 ConstantPoolCacheEntry::verify_tosBits(); | |
| 698 __ cmp(G1_scratch, atos ); | |
| 699 __ br(Assembler::equal, true, Assembler::pt, xreturn_path); | |
| 700 __ delayed()->ld_ptr(Otos_i, G3_scratch, Otos_i); | |
| 701 __ cmp(G1_scratch, itos); | |
| 702 __ br(Assembler::equal, true, Assembler::pt, xreturn_path); | |
| 703 __ delayed()->ld(Otos_i, G3_scratch, Otos_i); | |
| 704 __ cmp(G1_scratch, stos); | |
| 705 __ br(Assembler::equal, true, Assembler::pt, xreturn_path); | |
| 706 __ delayed()->ldsh(Otos_i, G3_scratch, Otos_i); | |
| 707 __ cmp(G1_scratch, ctos); | |
| 708 __ br(Assembler::equal, true, Assembler::pt, xreturn_path); | |
| 709 __ delayed()->lduh(Otos_i, G3_scratch, Otos_i); | |
| 710 #ifdef ASSERT | |
| 711 __ cmp(G1_scratch, btos); | |
| 712 __ br(Assembler::equal, true, Assembler::pt, xreturn_path); | |
| 713 __ delayed()->ldsb(Otos_i, G3_scratch, Otos_i); | |
| 714 __ should_not_reach_here(); | |
| 715 #endif | |
| 716 __ ldsb(Otos_i, G3_scratch, Otos_i); | |
| 717 __ bind(xreturn_path); | |
| 718 | |
| 719 // _ireturn/_areturn | |
| 720 __ retl(); // return from leaf routine | |
| 721 __ delayed()->mov(O5_savedSP, SP); | |
| 722 | |
| 723 // Generate regular method entry | |
| 724 __ bind(slow_path); | |
| 725 (void) generate_normal_entry(false); | |
| 726 return entry; | |
| 727 } | |
| 728 return NULL; | |
| 729 } | |
| 730 | |
|
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731 // Method entry for java.lang.ref.Reference.get. |
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732 address InterpreterGenerator::generate_Reference_get_entry(void) { |
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733 #ifndef SERIALGC |
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734 // Code: _aload_0, _getfield, _areturn |
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735 // parameter size = 1 |
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736 // |
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737 // The code that gets generated by this routine is split into 2 parts: |
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738 // 1. The "intrinsified" code for G1 (or any SATB based GC), |
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739 // 2. The slow path - which is an expansion of the regular method entry. |
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740 // |
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741 // Notes:- |
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742 // * In the G1 code we do not check whether we need to block for |
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743 // a safepoint. If G1 is enabled then we must execute the specialized |
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744 // code for Reference.get (except when the Reference object is null) |
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745 // so that we can log the value in the referent field with an SATB |
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746 // update buffer. |
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747 // If the code for the getfield template is modified so that the |
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748 // G1 pre-barrier code is executed when the current method is |
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749 // Reference.get() then going through the normal method entry |
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750 // will be fine. |
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751 // * The G1 code can, however, check the receiver object (the instance |
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752 // of java.lang.Reference) and jump to the slow path if null. If the |
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753 // Reference object is null then we obviously cannot fetch the referent |
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754 // and so we don't need to call the G1 pre-barrier. Thus we can use the |
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755 // regular method entry code to generate the NPE. |
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756 // |
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757 // This code is based on generate_accessor_enty. |
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758 |
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759 address entry = __ pc(); |
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760 |
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761 const int referent_offset = java_lang_ref_Reference::referent_offset; |
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762 guarantee(referent_offset > 0, "referent offset not initialized"); |
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763 |
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764 if (UseG1GC) { |
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765 Label slow_path; |
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766 |
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767 // In the G1 code we don't check if we need to reach a safepoint. We |
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768 // continue and the thread will safepoint at the next bytecode dispatch. |
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769 |
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770 // Check if local 0 != NULL |
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771 // If the receiver is null then it is OK to jump to the slow path. |
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772 __ ld_ptr(Gargs, G0, Otos_i ); // get local 0 |
| 3839 | 773 // check if local 0 == NULL and go the slow path |
| 774 __ cmp_and_brx_short(Otos_i, 0, Assembler::equal, Assembler::pn, slow_path); | |
|
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775 |
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776 |
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777 // Load the value of the referent field. |
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778 if (Assembler::is_simm13(referent_offset)) { |
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779 __ load_heap_oop(Otos_i, referent_offset, Otos_i); |
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780 } else { |
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781 __ set(referent_offset, G3_scratch); |
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782 __ load_heap_oop(Otos_i, G3_scratch, Otos_i); |
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783 } |
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784 |
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785 // Generate the G1 pre-barrier code to log the value of |
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786 // the referent field in an SATB buffer. Note with |
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787 // these parameters the pre-barrier does not generate |
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788 // the load of the previous value |
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789 |
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790 __ g1_write_barrier_pre(noreg /* obj */, noreg /* index */, 0 /* offset */, |
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791 Otos_i /* pre_val */, |
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792 G3_scratch /* tmp */, |
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793 true /* preserve_o_regs */); |
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794 |
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795 // _areturn |
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796 __ retl(); // return from leaf routine |
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797 __ delayed()->mov(O5_savedSP, SP); |
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798 |
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799 // Generate regular method entry |
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800 __ bind(slow_path); |
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801 (void) generate_normal_entry(false); |
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802 return entry; |
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803 } |
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804 #endif // SERIALGC |
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805 |
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806 // If G1 is not enabled then attempt to go through the accessor entry point |
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807 // Reference.get is an accessor |
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808 return generate_accessor_entry(); |
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809 } |
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810 |
| 0 | 811 // |
| 812 // Interpreter stub for calling a native method. (asm interpreter) | |
| 813 // This sets up a somewhat different looking stack for calling the native method | |
| 814 // than the typical interpreter frame setup. | |
| 815 // | |
| 816 | |
| 817 address InterpreterGenerator::generate_native_entry(bool synchronized) { | |
| 818 address entry = __ pc(); | |
| 819 | |
| 820 // the following temporary registers are used during frame creation | |
| 821 const Register Gtmp1 = G3_scratch ; | |
| 822 const Register Gtmp2 = G1_scratch; | |
| 823 bool inc_counter = UseCompiler || CountCompiledCalls; | |
| 824 | |
| 825 // make sure registers are different! | |
| 826 assert_different_registers(G2_thread, G5_method, Gargs, Gtmp1, Gtmp2); | |
| 827 | |
| 727 | 828 const Address Laccess_flags(Lmethod, methodOopDesc::access_flags_offset()); |
| 0 | 829 |
| 830 __ verify_oop(G5_method); | |
| 831 | |
| 832 const Register Glocals_size = G3; | |
| 833 assert_different_registers(Glocals_size, G4_scratch, Gframe_size); | |
| 834 | |
| 835 // make sure method is native & not abstract | |
| 836 // rethink these assertions - they can be simplified and shared (gri 2/25/2000) | |
| 837 #ifdef ASSERT | |
| 727 | 838 __ ld(G5_method, methodOopDesc::access_flags_offset(), Gtmp1); |
| 0 | 839 { |
| 840 Label L; | |
| 841 __ btst(JVM_ACC_NATIVE, Gtmp1); | |
| 842 __ br(Assembler::notZero, false, Assembler::pt, L); | |
| 843 __ delayed()->nop(); | |
| 844 __ stop("tried to execute non-native method as native"); | |
| 845 __ bind(L); | |
| 846 } | |
| 847 { Label L; | |
| 848 __ btst(JVM_ACC_ABSTRACT, Gtmp1); | |
| 849 __ br(Assembler::zero, false, Assembler::pt, L); | |
| 850 __ delayed()->nop(); | |
| 851 __ stop("tried to execute abstract method as non-abstract"); | |
| 852 __ bind(L); | |
| 853 } | |
| 854 #endif // ASSERT | |
| 855 | |
| 856 // generate the code to allocate the interpreter stack frame | |
| 857 generate_fixed_frame(true); | |
| 858 | |
| 859 // | |
| 860 // No locals to initialize for native method | |
| 861 // | |
| 862 | |
| 863 // this slot will be set later, we initialize it to null here just in | |
| 864 // case we get a GC before the actual value is stored later | |
| 727 | 865 __ st_ptr(G0, FP, (frame::interpreter_frame_oop_temp_offset * wordSize) + STACK_BIAS); |
| 0 | 866 |
| 727 | 867 const Address do_not_unlock_if_synchronized(G2_thread, |
| 868 JavaThread::do_not_unlock_if_synchronized_offset()); | |
| 0 | 869 // Since at this point in the method invocation the exception handler |
| 870 // would try to exit the monitor of synchronized methods which hasn't | |
| 871 // been entered yet, we set the thread local variable | |
| 872 // _do_not_unlock_if_synchronized to true. If any exception was thrown by | |
| 873 // runtime, exception handling i.e. unlock_if_synchronized_method will | |
| 874 // check this thread local flag. | |
| 875 // This flag has two effects, one is to force an unwind in the topmost | |
| 876 // interpreter frame and not perform an unlock while doing so. | |
| 877 | |
| 878 __ movbool(true, G3_scratch); | |
| 879 __ stbool(G3_scratch, do_not_unlock_if_synchronized); | |
| 880 | |
| 881 // increment invocation counter and check for overflow | |
| 882 // | |
| 883 // Note: checking for negative value instead of overflow | |
| 884 // so we have a 'sticky' overflow test (may be of | |
| 885 // importance as soon as we have true MT/MP) | |
| 886 Label invocation_counter_overflow; | |
| 887 Label Lcontinue; | |
| 888 if (inc_counter) { | |
| 889 generate_counter_incr(&invocation_counter_overflow, NULL, NULL); | |
| 890 | |
| 891 } | |
| 892 __ bind(Lcontinue); | |
| 893 | |
| 894 bang_stack_shadow_pages(true); | |
| 895 | |
| 896 // reset the _do_not_unlock_if_synchronized flag | |
| 897 __ stbool(G0, do_not_unlock_if_synchronized); | |
| 898 | |
| 899 // check for synchronized methods | |
| 900 // Must happen AFTER invocation_counter check and stack overflow check, | |
| 901 // so method is not locked if overflows. | |
| 902 | |
| 903 if (synchronized) { | |
| 904 lock_method(); | |
| 905 } else { | |
| 906 #ifdef ASSERT | |
| 907 { Label ok; | |
| 908 __ ld(Laccess_flags, O0); | |
| 909 __ btst(JVM_ACC_SYNCHRONIZED, O0); | |
| 910 __ br( Assembler::zero, false, Assembler::pt, ok); | |
| 911 __ delayed()->nop(); | |
| 912 __ stop("method needs synchronization"); | |
| 913 __ bind(ok); | |
| 914 } | |
| 915 #endif // ASSERT | |
| 916 } | |
| 917 | |
| 918 | |
| 919 // start execution | |
| 920 __ verify_thread(); | |
| 921 | |
| 922 // JVMTI support | |
| 923 __ notify_method_entry(); | |
| 924 | |
| 925 // native call | |
| 926 | |
| 927 // (note that O0 is never an oop--at most it is a handle) | |
| 928 // It is important not to smash any handles created by this call, | |
| 929 // until any oop handle in O0 is dereferenced. | |
| 930 | |
| 931 // (note that the space for outgoing params is preallocated) | |
| 932 | |
| 933 // get signature handler | |
| 934 { Label L; | |
| 727 | 935 Address signature_handler(Lmethod, methodOopDesc::signature_handler_offset()); |
| 936 __ ld_ptr(signature_handler, G3_scratch); | |
| 3839 | 937 __ br_notnull_short(G3_scratch, Assembler::pt, L); |
| 0 | 938 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::prepare_native_call), Lmethod); |
| 727 | 939 __ ld_ptr(signature_handler, G3_scratch); |
| 0 | 940 __ bind(L); |
| 941 } | |
| 942 | |
| 943 // Push a new frame so that the args will really be stored in | |
| 944 // Copy a few locals across so the new frame has the variables | |
| 945 // we need but these values will be dead at the jni call and | |
| 946 // therefore not gc volatile like the values in the current | |
| 947 // frame (Lmethod in particular) | |
| 948 | |
| 949 // Flush the method pointer to the register save area | |
| 950 __ st_ptr(Lmethod, SP, (Lmethod->sp_offset_in_saved_window() * wordSize) + STACK_BIAS); | |
| 951 __ mov(Llocals, O1); | |
| 727 | 952 |
| 0 | 953 // calculate where the mirror handle body is allocated in the interpreter frame: |
| 727 | 954 __ add(FP, (frame::interpreter_frame_oop_temp_offset * wordSize) + STACK_BIAS, O2); |
| 0 | 955 |
| 956 // Calculate current frame size | |
| 957 __ sub(SP, FP, O3); // Calculate negative of current frame size | |
| 958 __ save(SP, O3, SP); // Allocate an identical sized frame | |
| 959 | |
| 960 // Note I7 has leftover trash. Slow signature handler will fill it in | |
| 961 // should we get there. Normal jni call will set reasonable last_Java_pc | |
| 962 // below (and fix I7 so the stack trace doesn't have a meaningless frame | |
| 963 // in it). | |
| 964 | |
| 965 // Load interpreter frame's Lmethod into same register here | |
| 966 | |
| 967 __ ld_ptr(FP, (Lmethod->sp_offset_in_saved_window() * wordSize) + STACK_BIAS, Lmethod); | |
| 968 | |
| 969 __ mov(I1, Llocals); | |
| 970 __ mov(I2, Lscratch2); // save the address of the mirror | |
| 971 | |
| 972 | |
| 973 // ONLY Lmethod and Llocals are valid here! | |
| 974 | |
| 975 // call signature handler, It will move the arg properly since Llocals in current frame | |
| 976 // matches that in outer frame | |
| 977 | |
| 978 __ callr(G3_scratch, 0); | |
| 979 __ delayed()->nop(); | |
| 980 | |
| 981 // Result handler is in Lscratch | |
| 982 | |
| 983 // Reload interpreter frame's Lmethod since slow signature handler may block | |
| 984 __ ld_ptr(FP, (Lmethod->sp_offset_in_saved_window() * wordSize) + STACK_BIAS, Lmethod); | |
| 985 | |
| 986 { Label not_static; | |
| 987 | |
| 988 __ ld(Laccess_flags, O0); | |
| 989 __ btst(JVM_ACC_STATIC, O0); | |
| 990 __ br( Assembler::zero, false, Assembler::pt, not_static); | |
| 727 | 991 // get native function entry point(O0 is a good temp until the very end) |
| 992 __ delayed()->ld_ptr(Lmethod, in_bytes(methodOopDesc::native_function_offset()), O0); | |
| 0 | 993 // for static methods insert the mirror argument |
| 994 const int mirror_offset = klassOopDesc::klass_part_offset_in_bytes() + Klass::java_mirror_offset_in_bytes(); | |
| 995 | |
| 727 | 996 __ ld_ptr(Lmethod, methodOopDesc:: constants_offset(), O1); |
| 997 __ ld_ptr(O1, constantPoolOopDesc::pool_holder_offset_in_bytes(), O1); | |
| 0 | 998 __ ld_ptr(O1, mirror_offset, O1); |
| 999 #ifdef ASSERT | |
| 1000 if (!PrintSignatureHandlers) // do not dirty the output with this | |
| 1001 { Label L; | |
| 3839 | 1002 __ br_notnull_short(O1, Assembler::pt, L); |
| 0 | 1003 __ stop("mirror is missing"); |
| 1004 __ bind(L); | |
| 1005 } | |
| 1006 #endif // ASSERT | |
| 1007 __ st_ptr(O1, Lscratch2, 0); | |
| 1008 __ mov(Lscratch2, O1); | |
| 1009 __ bind(not_static); | |
| 1010 } | |
| 1011 | |
| 1012 // At this point, arguments have been copied off of stack into | |
| 1013 // their JNI positions, which are O1..O5 and SP[68..]. | |
| 1014 // Oops are boxed in-place on the stack, with handles copied to arguments. | |
| 1015 // The result handler is in Lscratch. O0 will shortly hold the JNIEnv*. | |
| 1016 | |
| 1017 #ifdef ASSERT | |
| 1018 { Label L; | |
| 3839 | 1019 __ br_notnull_short(O0, Assembler::pt, L); |
| 0 | 1020 __ stop("native entry point is missing"); |
| 1021 __ bind(L); | |
| 1022 } | |
| 1023 #endif // ASSERT | |
| 1024 | |
| 1025 // | |
| 1026 // setup the frame anchor | |
| 1027 // | |
| 1028 // The scavenge function only needs to know that the PC of this frame is | |
| 1029 // in the interpreter method entry code, it doesn't need to know the exact | |
| 1030 // PC and hence we can use O7 which points to the return address from the | |
| 1031 // previous call in the code stream (signature handler function) | |
| 1032 // | |
| 1033 // The other trick is we set last_Java_sp to FP instead of the usual SP because | |
| 1034 // we have pushed the extra frame in order to protect the volatile register(s) | |
| 1035 // in that frame when we return from the jni call | |
| 1036 // | |
| 1037 | |
| 1038 __ set_last_Java_frame(FP, O7); | |
| 1039 __ mov(O7, I7); // make dummy interpreter frame look like one above, | |
| 1040 // not meaningless information that'll confuse me. | |
| 1041 | |
| 1042 // flush the windows now. We don't care about the current (protection) frame | |
| 1043 // only the outer frames | |
| 1044 | |
| 1045 __ flush_windows(); | |
| 1046 | |
| 1047 // mark windows as flushed | |
| 727 | 1048 Address flags(G2_thread, JavaThread::frame_anchor_offset() + JavaFrameAnchor::flags_offset()); |
| 0 | 1049 __ set(JavaFrameAnchor::flushed, G3_scratch); |
| 1050 __ st(G3_scratch, flags); | |
| 1051 | |
| 1052 // Transition from _thread_in_Java to _thread_in_native. We are already safepoint ready. | |
| 1053 | |
| 727 | 1054 Address thread_state(G2_thread, JavaThread::thread_state_offset()); |
| 0 | 1055 #ifdef ASSERT |
| 1056 { Label L; | |
| 1057 __ ld(thread_state, G3_scratch); | |
| 3839 | 1058 __ cmp_and_br_short(G3_scratch, _thread_in_Java, Assembler::equal, Assembler::pt, L); |
| 0 | 1059 __ stop("Wrong thread state in native stub"); |
| 1060 __ bind(L); | |
| 1061 } | |
| 1062 #endif // ASSERT | |
| 1063 __ set(_thread_in_native, G3_scratch); | |
| 1064 __ st(G3_scratch, thread_state); | |
| 1065 | |
| 1066 // Call the jni method, using the delay slot to set the JNIEnv* argument. | |
| 1067 __ save_thread(L7_thread_cache); // save Gthread | |
| 1068 __ callr(O0, 0); | |
| 1069 __ delayed()-> | |
| 1070 add(L7_thread_cache, in_bytes(JavaThread::jni_environment_offset()), O0); | |
| 1071 | |
| 1072 // Back from jni method Lmethod in this frame is DEAD, DEAD, DEAD | |
| 1073 | |
| 1074 __ restore_thread(L7_thread_cache); // restore G2_thread | |
|
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1075 __ reinit_heapbase(); |
| 0 | 1076 |
| 1077 // must we block? | |
| 1078 | |
| 1079 // Block, if necessary, before resuming in _thread_in_Java state. | |
| 1080 // In order for GC to work, don't clear the last_Java_sp until after blocking. | |
| 1081 { Label no_block; | |
| 727 | 1082 AddressLiteral sync_state(SafepointSynchronize::address_of_state()); |
| 0 | 1083 |
| 1084 // Switch thread to "native transition" state before reading the synchronization state. | |
| 1085 // This additional state is necessary because reading and testing the synchronization | |
| 1086 // state is not atomic w.r.t. GC, as this scenario demonstrates: | |
| 1087 // Java thread A, in _thread_in_native state, loads _not_synchronized and is preempted. | |
| 1088 // VM thread changes sync state to synchronizing and suspends threads for GC. | |
| 1089 // Thread A is resumed to finish this native method, but doesn't block here since it | |
| 1090 // didn't see any synchronization is progress, and escapes. | |
| 1091 __ set(_thread_in_native_trans, G3_scratch); | |
| 1092 __ st(G3_scratch, thread_state); | |
| 1093 if(os::is_MP()) { | |
| 1094 if (UseMembar) { | |
| 1095 // Force this write out before the read below | |
| 1096 __ membar(Assembler::StoreLoad); | |
| 1097 } else { | |
| 1098 // Write serialization page so VM thread can do a pseudo remote membar. | |
| 1099 // We use the current thread pointer to calculate a thread specific | |
| 1100 // offset to write to within the page. This minimizes bus traffic | |
| 1101 // due to cache line collision. | |
| 1102 __ serialize_memory(G2_thread, G1_scratch, G3_scratch); | |
| 1103 } | |
| 1104 } | |
| 1105 __ load_contents(sync_state, G3_scratch); | |
| 1106 __ cmp(G3_scratch, SafepointSynchronize::_not_synchronized); | |
| 1107 | |
| 1108 Label L; | |
| 1109 __ br(Assembler::notEqual, false, Assembler::pn, L); | |
| 727 | 1110 __ delayed()->ld(G2_thread, JavaThread::suspend_flags_offset(), G3_scratch); |
| 3839 | 1111 __ cmp_and_br_short(G3_scratch, 0, Assembler::equal, Assembler::pt, no_block); |
| 0 | 1112 __ bind(L); |
| 1113 | |
| 1114 // Block. Save any potential method result value before the operation and | |
| 1115 // use a leaf call to leave the last_Java_frame setup undisturbed. | |
| 1116 save_native_result(); | |
| 1117 __ call_VM_leaf(L7_thread_cache, | |
| 1118 CAST_FROM_FN_PTR(address, JavaThread::check_special_condition_for_native_trans), | |
| 1119 G2_thread); | |
| 1120 | |
| 1121 // Restore any method result value | |
| 1122 restore_native_result(); | |
| 1123 __ bind(no_block); | |
| 1124 } | |
| 1125 | |
| 1126 // Clear the frame anchor now | |
| 1127 | |
| 1128 __ reset_last_Java_frame(); | |
| 1129 | |
| 1130 // Move the result handler address | |
| 1131 __ mov(Lscratch, G3_scratch); | |
| 1132 // return possible result to the outer frame | |
| 1133 #ifndef __LP64 | |
| 1134 __ mov(O0, I0); | |
| 1135 __ restore(O1, G0, O1); | |
| 1136 #else | |
| 1137 __ restore(O0, G0, O0); | |
| 1138 #endif /* __LP64 */ | |
| 1139 | |
| 1140 // Move result handler to expected register | |
| 1141 __ mov(G3_scratch, Lscratch); | |
| 1142 | |
| 1143 // Back in normal (native) interpreter frame. State is thread_in_native_trans | |
| 1144 // switch to thread_in_Java. | |
| 1145 | |
| 1146 __ set(_thread_in_Java, G3_scratch); | |
| 1147 __ st(G3_scratch, thread_state); | |
| 1148 | |
| 1149 // reset handle block | |
| 727 | 1150 __ ld_ptr(G2_thread, JavaThread::active_handles_offset(), G3_scratch); |
| 0 | 1151 __ st_ptr(G0, G3_scratch, JNIHandleBlock::top_offset_in_bytes()); |
| 1152 | |
| 1153 // If we have an oop result store it where it will be safe for any further gc | |
| 1154 // until we return now that we've released the handle it might be protected by | |
| 1155 | |
| 1156 { | |
| 1157 Label no_oop, store_result; | |
| 1158 | |
| 1159 __ set((intptr_t)AbstractInterpreter::result_handler(T_OBJECT), G3_scratch); | |
| 3839 | 1160 __ cmp_and_brx_short(G3_scratch, Lscratch, Assembler::notEqual, Assembler::pt, no_oop); |
| 0 | 1161 __ addcc(G0, O0, O0); |
| 1162 __ brx(Assembler::notZero, true, Assembler::pt, store_result); // if result is not NULL: | |
| 1163 __ delayed()->ld_ptr(O0, 0, O0); // unbox it | |
| 1164 __ mov(G0, O0); | |
| 1165 | |
| 1166 __ bind(store_result); | |
| 1167 // Store it where gc will look for it and result handler expects it. | |
| 1168 __ st_ptr(O0, FP, (frame::interpreter_frame_oop_temp_offset*wordSize) + STACK_BIAS); | |
| 1169 | |
| 1170 __ bind(no_oop); | |
| 1171 | |
| 1172 } | |
| 1173 | |
| 1174 | |
| 1175 // handle exceptions (exception handling will handle unlocking!) | |
| 1176 { Label L; | |
| 727 | 1177 Address exception_addr(G2_thread, Thread::pending_exception_offset()); |
| 0 | 1178 __ ld_ptr(exception_addr, Gtemp); |
| 3839 | 1179 __ br_null_short(Gtemp, Assembler::pt, L); |
| 0 | 1180 // Note: This could be handled more efficiently since we know that the native |
| 1181 // method doesn't have an exception handler. We could directly return | |
| 1182 // to the exception handler for the caller. | |
| 1183 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_pending_exception)); | |
| 1184 __ should_not_reach_here(); | |
| 1185 __ bind(L); | |
| 1186 } | |
| 1187 | |
| 1188 // JVMTI support (preserves thread register) | |
| 1189 __ notify_method_exit(true, ilgl, InterpreterMacroAssembler::NotifyJVMTI); | |
| 1190 | |
| 1191 if (synchronized) { | |
| 1192 // save and restore any potential method result value around the unlocking operation | |
| 1193 save_native_result(); | |
| 1194 | |
| 1195 __ add( __ top_most_monitor(), O1); | |
| 1196 __ unlock_object(O1); | |
| 1197 | |
| 1198 restore_native_result(); | |
| 1199 } | |
| 1200 | |
| 1201 #if defined(COMPILER2) && !defined(_LP64) | |
| 1202 | |
| 1203 // C2 expects long results in G1 we can't tell if we're returning to interpreted | |
| 1204 // or compiled so just be safe. | |
| 1205 | |
| 1206 __ sllx(O0, 32, G1); // Shift bits into high G1 | |
| 1207 __ srl (O1, 0, O1); // Zero extend O1 | |
| 1208 __ or3 (O1, G1, G1); // OR 64 bits into G1 | |
| 1209 | |
| 1210 #endif /* COMPILER2 && !_LP64 */ | |
| 1211 | |
| 1212 // dispose of return address and remove activation | |
| 1213 #ifdef ASSERT | |
| 1214 { | |
| 1215 Label ok; | |
| 3839 | 1216 __ cmp_and_brx_short(I5_savedSP, FP, Assembler::greaterEqualUnsigned, Assembler::pt, ok); |
| 0 | 1217 __ stop("bad I5_savedSP value"); |
| 1218 __ should_not_reach_here(); | |
| 1219 __ bind(ok); | |
| 1220 } | |
| 1221 #endif | |
| 1222 if (TraceJumps) { | |
| 1223 // Move target to register that is recordable | |
| 1224 __ mov(Lscratch, G3_scratch); | |
| 1225 __ JMP(G3_scratch, 0); | |
| 1226 } else { | |
| 1227 __ jmp(Lscratch, 0); | |
| 1228 } | |
| 1229 __ delayed()->nop(); | |
| 1230 | |
| 1231 | |
| 1232 if (inc_counter) { | |
| 1233 // handle invocation counter overflow | |
| 1234 __ bind(invocation_counter_overflow); | |
| 1235 generate_counter_overflow(Lcontinue); | |
| 1236 } | |
| 1237 | |
| 1238 | |
| 1239 | |
| 1240 return entry; | |
| 1241 } | |
| 1242 | |
| 1243 | |
| 1244 // Generic method entry to (asm) interpreter | |
| 1245 //------------------------------------------------------------------------------------------------------------------------ | |
| 1246 // | |
| 1247 address InterpreterGenerator::generate_normal_entry(bool synchronized) { | |
| 1248 address entry = __ pc(); | |
| 1249 | |
| 1250 bool inc_counter = UseCompiler || CountCompiledCalls; | |
| 1251 | |
| 1252 // the following temporary registers are used during frame creation | |
| 1253 const Register Gtmp1 = G3_scratch ; | |
| 1254 const Register Gtmp2 = G1_scratch; | |
| 1255 | |
| 1256 // make sure registers are different! | |
| 1257 assert_different_registers(G2_thread, G5_method, Gargs, Gtmp1, Gtmp2); | |
| 1258 | |
| 727 | 1259 const Address size_of_parameters(G5_method, methodOopDesc::size_of_parameters_offset()); |
| 1260 const Address size_of_locals (G5_method, methodOopDesc::size_of_locals_offset()); | |
| 0 | 1261 // Seems like G5_method is live at the point this is used. So we could make this look consistent |
| 1262 // and use in the asserts. | |
| 727 | 1263 const Address access_flags (Lmethod, methodOopDesc::access_flags_offset()); |
| 0 | 1264 |
| 1265 __ verify_oop(G5_method); | |
| 1266 | |
| 1267 const Register Glocals_size = G3; | |
| 1268 assert_different_registers(Glocals_size, G4_scratch, Gframe_size); | |
| 1269 | |
| 1270 // make sure method is not native & not abstract | |
| 1271 // rethink these assertions - they can be simplified and shared (gri 2/25/2000) | |
| 1272 #ifdef ASSERT | |
| 727 | 1273 __ ld(G5_method, methodOopDesc::access_flags_offset(), Gtmp1); |
| 0 | 1274 { |
| 1275 Label L; | |
| 1276 __ btst(JVM_ACC_NATIVE, Gtmp1); | |
| 1277 __ br(Assembler::zero, false, Assembler::pt, L); | |
| 1278 __ delayed()->nop(); | |
| 1279 __ stop("tried to execute native method as non-native"); | |
| 1280 __ bind(L); | |
| 1281 } | |
| 1282 { Label L; | |
| 1283 __ btst(JVM_ACC_ABSTRACT, Gtmp1); | |
| 1284 __ br(Assembler::zero, false, Assembler::pt, L); | |
| 1285 __ delayed()->nop(); | |
| 1286 __ stop("tried to execute abstract method as non-abstract"); | |
| 1287 __ bind(L); | |
| 1288 } | |
| 1289 #endif // ASSERT | |
| 1290 | |
| 1291 // generate the code to allocate the interpreter stack frame | |
| 1292 | |
| 1293 generate_fixed_frame(false); | |
| 1294 | |
| 1295 #ifdef FAST_DISPATCH | |
| 1296 __ set((intptr_t)Interpreter::dispatch_table(), IdispatchTables); | |
| 1297 // set bytecode dispatch table base | |
| 1298 #endif | |
| 1299 | |
| 1300 // | |
| 1301 // Code to initialize the extra (i.e. non-parm) locals | |
| 1302 // | |
| 1303 Register init_value = noreg; // will be G0 if we must clear locals | |
| 1304 // The way the code was setup before zerolocals was always true for vanilla java entries. | |
| 1305 // It could only be false for the specialized entries like accessor or empty which have | |
| 1306 // no extra locals so the testing was a waste of time and the extra locals were always | |
| 1307 // initialized. We removed this extra complication to already over complicated code. | |
| 1308 | |
| 1309 init_value = G0; | |
| 1310 Label clear_loop; | |
| 1311 | |
| 1312 // NOTE: If you change the frame layout, this code will need to | |
| 1313 // be updated! | |
| 1314 __ lduh( size_of_locals, O2 ); | |
| 1315 __ lduh( size_of_parameters, O1 ); | |
| 1506 | 1316 __ sll( O2, Interpreter::logStackElementSize, O2); |
| 1317 __ sll( O1, Interpreter::logStackElementSize, O1 ); | |
| 0 | 1318 __ sub( Llocals, O2, O2 ); |
| 1319 __ sub( Llocals, O1, O1 ); | |
| 1320 | |
| 1321 __ bind( clear_loop ); | |
| 1322 __ inc( O2, wordSize ); | |
| 1323 | |
| 1324 __ cmp( O2, O1 ); | |
| 1325 __ brx( Assembler::lessEqualUnsigned, true, Assembler::pt, clear_loop ); | |
| 1326 __ delayed()->st_ptr( init_value, O2, 0 ); | |
| 1327 | |
| 727 | 1328 const Address do_not_unlock_if_synchronized(G2_thread, |
| 1329 JavaThread::do_not_unlock_if_synchronized_offset()); | |
| 0 | 1330 // Since at this point in the method invocation the exception handler |
| 1331 // would try to exit the monitor of synchronized methods which hasn't | |
| 1332 // been entered yet, we set the thread local variable | |
| 1333 // _do_not_unlock_if_synchronized to true. If any exception was thrown by | |
| 1334 // runtime, exception handling i.e. unlock_if_synchronized_method will | |
| 1335 // check this thread local flag. | |
| 1336 __ movbool(true, G3_scratch); | |
| 1337 __ stbool(G3_scratch, do_not_unlock_if_synchronized); | |
| 1338 | |
| 1339 // increment invocation counter and check for overflow | |
| 1340 // | |
| 1341 // Note: checking for negative value instead of overflow | |
| 1342 // so we have a 'sticky' overflow test (may be of | |
| 1343 // importance as soon as we have true MT/MP) | |
| 1344 Label invocation_counter_overflow; | |
| 1345 Label profile_method; | |
| 1346 Label profile_method_continue; | |
| 1347 Label Lcontinue; | |
| 1348 if (inc_counter) { | |
| 1349 generate_counter_incr(&invocation_counter_overflow, &profile_method, &profile_method_continue); | |
| 1350 if (ProfileInterpreter) { | |
| 1351 __ bind(profile_method_continue); | |
| 1352 } | |
| 1353 } | |
| 1354 __ bind(Lcontinue); | |
| 1355 | |
| 1356 bang_stack_shadow_pages(false); | |
| 1357 | |
| 1358 // reset the _do_not_unlock_if_synchronized flag | |
| 1359 __ stbool(G0, do_not_unlock_if_synchronized); | |
| 1360 | |
| 1361 // check for synchronized methods | |
| 1362 // Must happen AFTER invocation_counter check and stack overflow check, | |
| 1363 // so method is not locked if overflows. | |
| 1364 | |
| 1365 if (synchronized) { | |
| 1366 lock_method(); | |
| 1367 } else { | |
| 1368 #ifdef ASSERT | |
| 1369 { Label ok; | |
| 1370 __ ld(access_flags, O0); | |
| 1371 __ btst(JVM_ACC_SYNCHRONIZED, O0); | |
| 1372 __ br( Assembler::zero, false, Assembler::pt, ok); | |
| 1373 __ delayed()->nop(); | |
| 1374 __ stop("method needs synchronization"); | |
| 1375 __ bind(ok); | |
| 1376 } | |
| 1377 #endif // ASSERT | |
| 1378 } | |
| 1379 | |
| 1380 // start execution | |
| 1381 | |
| 1382 __ verify_thread(); | |
| 1383 | |
| 1384 // jvmti support | |
| 1385 __ notify_method_entry(); | |
| 1386 | |
| 1387 // start executing instructions | |
| 1388 __ dispatch_next(vtos); | |
| 1389 | |
| 1390 | |
| 1391 if (inc_counter) { | |
| 1392 if (ProfileInterpreter) { | |
| 1393 // We have decided to profile this method in the interpreter | |
| 1394 __ bind(profile_method); | |
| 1395 | |
|
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1396 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::profile_method)); |
|
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1397 __ set_method_data_pointer_for_bcp(); |
| 3839 | 1398 __ ba_short(profile_method_continue); |
| 0 | 1399 } |
| 1400 | |
| 1401 // handle invocation counter overflow | |
| 1402 __ bind(invocation_counter_overflow); | |
| 1403 generate_counter_overflow(Lcontinue); | |
| 1404 } | |
| 1405 | |
| 1406 | |
| 1407 return entry; | |
| 1408 } | |
| 1409 | |
| 1410 | |
| 1411 //---------------------------------------------------------------------------------------------------- | |
| 1412 // Entry points & stack frame layout | |
| 1413 // | |
| 1414 // Here we generate the various kind of entries into the interpreter. | |
| 1415 // The two main entry type are generic bytecode methods and native call method. | |
| 1416 // These both come in synchronized and non-synchronized versions but the | |
| 1417 // frame layout they create is very similar. The other method entry | |
| 1418 // types are really just special purpose entries that are really entry | |
| 1419 // and interpretation all in one. These are for trivial methods like | |
| 1420 // accessor, empty, or special math methods. | |
| 1421 // | |
| 1422 // When control flow reaches any of the entry types for the interpreter | |
| 1423 // the following holds -> | |
| 1424 // | |
| 1425 // C2 Calling Conventions: | |
| 1426 // | |
| 1427 // The entry code below assumes that the following registers are set | |
| 1428 // when coming in: | |
| 1429 // G5_method: holds the methodOop of the method to call | |
| 1430 // Lesp: points to the TOS of the callers expression stack | |
| 1431 // after having pushed all the parameters | |
| 1432 // | |
| 1433 // The entry code does the following to setup an interpreter frame | |
| 1434 // pop parameters from the callers stack by adjusting Lesp | |
| 1435 // set O0 to Lesp | |
| 1436 // compute X = (max_locals - num_parameters) | |
| 1437 // bump SP up by X to accomadate the extra locals | |
| 1438 // compute X = max_expression_stack | |
| 1439 // + vm_local_words | |
| 1440 // + 16 words of register save area | |
| 1441 // save frame doing a save sp, -X, sp growing towards lower addresses | |
| 1442 // set Lbcp, Lmethod, LcpoolCache | |
| 1443 // set Llocals to i0 | |
| 1444 // set Lmonitors to FP - rounded_vm_local_words | |
| 1445 // set Lesp to Lmonitors - 4 | |
| 1446 // | |
| 1447 // The frame has now been setup to do the rest of the entry code | |
| 1448 | |
| 1449 // Try this optimization: Most method entries could live in a | |
| 1450 // "one size fits all" stack frame without all the dynamic size | |
| 1451 // calculations. It might be profitable to do all this calculation | |
| 1452 // statically and approximately for "small enough" methods. | |
| 1453 | |
| 1454 //----------------------------------------------------------------------------------------------- | |
| 1455 | |
| 1456 // C1 Calling conventions | |
| 1457 // | |
| 1458 // Upon method entry, the following registers are setup: | |
| 1459 // | |
| 1460 // g2 G2_thread: current thread | |
| 1461 // g5 G5_method: method to activate | |
| 1462 // g4 Gargs : pointer to last argument | |
| 1463 // | |
| 1464 // | |
| 1465 // Stack: | |
| 1466 // | |
| 1467 // +---------------+ <--- sp | |
| 1468 // | | | |
| 1469 // : reg save area : | |
| 1470 // | | | |
| 1471 // +---------------+ <--- sp + 0x40 | |
| 1472 // | | | |
| 1473 // : extra 7 slots : note: these slots are not really needed for the interpreter (fix later) | |
| 1474 // | | | |
| 1475 // +---------------+ <--- sp + 0x5c | |
| 1476 // | | | |
| 1477 // : free : | |
| 1478 // | | | |
| 1479 // +---------------+ <--- Gargs | |
| 1480 // | | | |
| 1481 // : arguments : | |
| 1482 // | | | |
| 1483 // +---------------+ | |
| 1484 // | | | |
| 1485 // | |
| 1486 // | |
| 1487 // | |
| 1488 // AFTER FRAME HAS BEEN SETUP for method interpretation the stack looks like: | |
| 1489 // | |
| 1490 // +---------------+ <--- sp | |
| 1491 // | | | |
| 1492 // : reg save area : | |
| 1493 // | | | |
| 1494 // +---------------+ <--- sp + 0x40 | |
| 1495 // | | | |
| 1496 // : extra 7 slots : note: these slots are not really needed for the interpreter (fix later) | |
| 1497 // | | | |
| 1498 // +---------------+ <--- sp + 0x5c | |
| 1499 // | | | |
| 1500 // : : | |
| 1501 // | | <--- Lesp | |
| 1502 // +---------------+ <--- Lmonitors (fp - 0x18) | |
| 1503 // | VM locals | | |
| 1504 // +---------------+ <--- fp | |
| 1505 // | | | |
| 1506 // : reg save area : | |
| 1507 // | | | |
| 1508 // +---------------+ <--- fp + 0x40 | |
| 1509 // | | | |
| 1510 // : extra 7 slots : note: these slots are not really needed for the interpreter (fix later) | |
| 1511 // | | | |
| 1512 // +---------------+ <--- fp + 0x5c | |
| 1513 // | | | |
| 1514 // : free : | |
| 1515 // | | | |
| 1516 // +---------------+ | |
| 1517 // | | | |
| 1518 // : nonarg locals : | |
| 1519 // | | | |
| 1520 // +---------------+ | |
| 1521 // | | | |
| 1522 // : arguments : | |
| 1523 // | | <--- Llocals | |
| 1524 // +---------------+ <--- Gargs | |
| 1525 // | | | |
| 1526 | |
| 1527 static int size_activation_helper(int callee_extra_locals, int max_stack, int monitor_size) { | |
| 1528 | |
| 1529 // Figure out the size of an interpreter frame (in words) given that we have a fully allocated | |
| 1530 // expression stack, the callee will have callee_extra_locals (so we can account for | |
| 1531 // frame extension) and monitor_size for monitors. Basically we need to calculate | |
| 1532 // this exactly like generate_fixed_frame/generate_compute_interpreter_state. | |
| 1533 // | |
| 1534 // | |
| 1535 // The big complicating thing here is that we must ensure that the stack stays properly | |
| 1536 // aligned. This would be even uglier if monitor size wasn't modulo what the stack | |
| 1537 // needs to be aligned for). We are given that the sp (fp) is already aligned by | |
| 1538 // the caller so we must ensure that it is properly aligned for our callee. | |
| 1539 // | |
| 1540 const int rounded_vm_local_words = | |
| 1541 round_to(frame::interpreter_frame_vm_local_words,WordsPerLong); | |
| 1542 // callee_locals and max_stack are counts, not the size in frame. | |
| 1543 const int locals_size = | |
| 1506 | 1544 round_to(callee_extra_locals * Interpreter::stackElementWords, WordsPerLong); |
| 1545 const int max_stack_words = max_stack * Interpreter::stackElementWords; | |
| 0 | 1546 return (round_to((max_stack_words |
| 710 | 1547 //6815692//+ methodOopDesc::extra_stack_words() |
| 0 | 1548 + rounded_vm_local_words |
| 1549 + frame::memory_parameter_word_sp_offset), WordsPerLong) | |
| 1550 // already rounded | |
| 1551 + locals_size + monitor_size); | |
| 1552 } | |
| 1553 | |
| 1554 // How much stack a method top interpreter activation needs in words. | |
| 1555 int AbstractInterpreter::size_top_interpreter_activation(methodOop method) { | |
| 1556 | |
| 1557 // See call_stub code | |
| 1558 int call_stub_size = round_to(7 + frame::memory_parameter_word_sp_offset, | |
| 1559 WordsPerLong); // 7 + register save area | |
| 1560 | |
| 1561 // Save space for one monitor to get into the interpreted method in case | |
| 1562 // the method is synchronized | |
| 1563 int monitor_size = method->is_synchronized() ? | |
| 1564 1*frame::interpreter_frame_monitor_size() : 0; | |
| 1565 return size_activation_helper(method->max_locals(), method->max_stack(), | |
| 1566 monitor_size) + call_stub_size; | |
| 1567 } | |
| 1568 | |
| 1569 int AbstractInterpreter::layout_activation(methodOop method, | |
| 1570 int tempcount, | |
| 1571 int popframe_extra_args, | |
| 1572 int moncount, | |
|
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1573 int caller_actual_parameters, |
| 0 | 1574 int callee_param_count, |
| 1575 int callee_local_count, | |
| 1576 frame* caller, | |
| 1577 frame* interpreter_frame, | |
| 1578 bool is_top_frame) { | |
| 1579 // Note: This calculation must exactly parallel the frame setup | |
| 1580 // in InterpreterGenerator::generate_fixed_frame. | |
| 1581 // If f!=NULL, set up the following variables: | |
| 1582 // - Lmethod | |
| 1583 // - Llocals | |
| 1584 // - Lmonitors (to the indicated number of monitors) | |
| 1585 // - Lesp (to the indicated number of temps) | |
| 1586 // The frame f (if not NULL) on entry is a description of the caller of the frame | |
| 1587 // we are about to layout. We are guaranteed that we will be able to fill in a | |
| 1588 // new interpreter frame as its callee (i.e. the stack space is allocated and | |
| 1589 // the amount was determined by an earlier call to this method with f == NULL). | |
| 1590 // On return f (if not NULL) while describe the interpreter frame we just layed out. | |
| 1591 | |
| 1592 int monitor_size = moncount * frame::interpreter_frame_monitor_size(); | |
| 1593 int rounded_vm_local_words = round_to(frame::interpreter_frame_vm_local_words,WordsPerLong); | |
| 1594 | |
| 1595 assert(monitor_size == round_to(monitor_size, WordsPerLong), "must align"); | |
| 1596 // | |
| 1597 // Note: if you look closely this appears to be doing something much different | |
| 1598 // than generate_fixed_frame. What is happening is this. On sparc we have to do | |
| 1599 // this dance with interpreter_sp_adjustment because the window save area would | |
| 1600 // appear just below the bottom (tos) of the caller's java expression stack. Because | |
| 1601 // the interpreter want to have the locals completely contiguous generate_fixed_frame | |
| 1602 // will adjust the caller's sp for the "extra locals" (max_locals - parameter_size). | |
| 1603 // Now in generate_fixed_frame the extension of the caller's sp happens in the callee. | |
| 1604 // In this code the opposite occurs the caller adjusts it's own stack base on the callee. | |
| 1605 // This is mostly ok but it does cause a problem when we get to the initial frame (the oldest) | |
| 1606 // because the oldest frame would have adjust its callers frame and yet that frame | |
| 1607 // already exists and isn't part of this array of frames we are unpacking. So at first | |
| 1608 // glance this would seem to mess up that frame. However Deoptimization::fetch_unroll_info_helper() | |
| 1609 // will after it calculates all of the frame's on_stack_size()'s will then figure out the | |
| 1610 // amount to adjust the caller of the initial (oldest) frame and the calculation will all | |
| 1611 // add up. It does seem like it simpler to account for the adjustment here (and remove the | |
| 1612 // callee... parameters here). However this would mean that this routine would have to take | |
| 1613 // the caller frame as input so we could adjust its sp (and set it's interpreter_sp_adjustment) | |
| 1614 // and run the calling loop in the reverse order. This would also would appear to mean making | |
| 1615 // this code aware of what the interactions are when that initial caller fram was an osr or | |
| 1616 // other adapter frame. deoptimization is complicated enough and hard enough to debug that | |
| 1617 // there is no sense in messing working code. | |
| 1618 // | |
| 1619 | |
| 1620 int rounded_cls = round_to((callee_local_count - callee_param_count), WordsPerLong); | |
| 1621 assert(rounded_cls == round_to(rounded_cls, WordsPerLong), "must align"); | |
| 1622 | |
| 1623 int raw_frame_size = size_activation_helper(rounded_cls, method->max_stack(), | |
| 1624 monitor_size); | |
| 1625 | |
| 1626 if (interpreter_frame != NULL) { | |
| 1627 // The skeleton frame must already look like an interpreter frame | |
| 1628 // even if not fully filled out. | |
| 1629 assert(interpreter_frame->is_interpreted_frame(), "Must be interpreted frame"); | |
| 1630 | |
| 1631 intptr_t* fp = interpreter_frame->fp(); | |
| 1632 | |
| 1633 JavaThread* thread = JavaThread::current(); | |
| 1634 RegisterMap map(thread, false); | |
| 1635 // More verification that skeleton frame is properly walkable | |
| 1636 assert(fp == caller->sp(), "fp must match"); | |
| 1637 | |
| 1638 intptr_t* montop = fp - rounded_vm_local_words; | |
| 1639 | |
| 1640 // preallocate monitors (cf. __ add_monitor_to_stack) | |
| 1641 intptr_t* monitors = montop - monitor_size; | |
| 1642 | |
| 1643 // preallocate stack space | |
| 1644 intptr_t* esp = monitors - 1 - | |
| 1506 | 1645 (tempcount * Interpreter::stackElementWords) - |
| 0 | 1646 popframe_extra_args; |
| 1647 | |
| 1506 | 1648 int local_words = method->max_locals() * Interpreter::stackElementWords; |
|
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1649 NEEDS_CLEANUP; |
| 0 | 1650 intptr_t* locals; |
|
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1651 if (caller->is_interpreted_frame()) { |
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1652 // Can force the locals area to end up properly overlapping the top of the expression stack. |
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1653 intptr_t* Lesp_ptr = caller->interpreter_frame_tos_address() - 1; |
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1654 // Note that this computation means we replace size_of_parameters() values from the caller |
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1655 // interpreter frame's expression stack with our argument locals |
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1656 int parm_words = caller_actual_parameters * Interpreter::stackElementWords; |
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1657 locals = Lesp_ptr + parm_words; |
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1658 int delta = local_words - parm_words; |
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1659 int computed_sp_adjustment = (delta > 0) ? round_to(delta, WordsPerLong) : 0; |
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1660 *interpreter_frame->register_addr(I5_savedSP) = (intptr_t) (fp + computed_sp_adjustment) - STACK_BIAS; |
| 0 | 1661 } else { |
|
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1662 assert(caller->is_compiled_frame() || caller->is_entry_frame() || caller->is_ricochet_frame(), "only possible cases"); |
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1663 // Don't have Lesp available; lay out locals block in the caller |
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1664 // adjacent to the register window save area. |
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1665 // |
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1666 // Compiled frames do not allocate a varargs area which is why this if |
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1667 // statement is needed. |
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1668 // |
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1669 if (caller->is_compiled_frame()) { |
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1670 locals = fp + frame::register_save_words + local_words - 1; |
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1671 } else { |
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1672 locals = fp + frame::memory_parameter_word_sp_offset + local_words - 1; |
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1673 } |
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1674 if (!caller->is_entry_frame()) { |
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1675 // Caller wants his own SP back |
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1676 int caller_frame_size = caller->cb()->frame_size(); |
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1677 *interpreter_frame->register_addr(I5_savedSP) = (intptr_t)(caller->fp() - caller_frame_size) - STACK_BIAS; |
| 0 | 1678 } |
| 1679 } | |
| 1680 if (TraceDeoptimization) { | |
| 1681 if (caller->is_entry_frame()) { | |
| 1682 // make sure I5_savedSP and the entry frames notion of saved SP | |
| 1683 // agree. This assertion duplicate a check in entry frame code | |
| 1684 // but catches the failure earlier. | |
| 1685 assert(*caller->register_addr(Lscratch) == *interpreter_frame->register_addr(I5_savedSP), | |
| 1686 "would change callers SP"); | |
| 1687 } | |
| 1688 if (caller->is_entry_frame()) { | |
| 1689 tty->print("entry "); | |
| 1690 } | |
| 1691 if (caller->is_compiled_frame()) { | |
| 1692 tty->print("compiled "); | |
| 1693 if (caller->is_deoptimized_frame()) { | |
| 1694 tty->print("(deopt) "); | |
| 1695 } | |
| 1696 } | |
| 1697 if (caller->is_interpreted_frame()) { | |
| 1698 tty->print("interpreted "); | |
| 1699 } | |
| 1700 tty->print_cr("caller fp=0x%x sp=0x%x", caller->fp(), caller->sp()); | |
| 1701 tty->print_cr("save area = 0x%x, 0x%x", caller->sp(), caller->sp() + 16); | |
| 1702 tty->print_cr("save area = 0x%x, 0x%x", caller->fp(), caller->fp() + 16); | |
| 1703 tty->print_cr("interpreter fp=0x%x sp=0x%x", interpreter_frame->fp(), interpreter_frame->sp()); | |
| 1704 tty->print_cr("save area = 0x%x, 0x%x", interpreter_frame->sp(), interpreter_frame->sp() + 16); | |
| 1705 tty->print_cr("save area = 0x%x, 0x%x", interpreter_frame->fp(), interpreter_frame->fp() + 16); | |
| 1706 tty->print_cr("Llocals = 0x%x", locals); | |
| 1707 tty->print_cr("Lesp = 0x%x", esp); | |
| 1708 tty->print_cr("Lmonitors = 0x%x", monitors); | |
| 1709 } | |
| 1710 | |
| 1711 if (method->max_locals() > 0) { | |
| 1712 assert(locals < caller->sp() || locals >= (caller->sp() + 16), "locals in save area"); | |
| 1713 assert(locals < caller->fp() || locals > (caller->fp() + 16), "locals in save area"); | |
| 1714 assert(locals < interpreter_frame->sp() || locals > (interpreter_frame->sp() + 16), "locals in save area"); | |
| 1715 assert(locals < interpreter_frame->fp() || locals >= (interpreter_frame->fp() + 16), "locals in save area"); | |
| 1716 } | |
| 1717 #ifdef _LP64 | |
| 1718 assert(*interpreter_frame->register_addr(I5_savedSP) & 1, "must be odd"); | |
| 1719 #endif | |
| 1720 | |
| 1721 *interpreter_frame->register_addr(Lmethod) = (intptr_t) method; | |
| 1722 *interpreter_frame->register_addr(Llocals) = (intptr_t) locals; | |
| 1723 *interpreter_frame->register_addr(Lmonitors) = (intptr_t) monitors; | |
| 1724 *interpreter_frame->register_addr(Lesp) = (intptr_t) esp; | |
| 1725 // Llast_SP will be same as SP as there is no adapter space | |
| 1726 *interpreter_frame->register_addr(Llast_SP) = (intptr_t) interpreter_frame->sp() - STACK_BIAS; | |
| 1727 *interpreter_frame->register_addr(LcpoolCache) = (intptr_t) method->constants()->cache(); | |
| 1728 #ifdef FAST_DISPATCH | |
| 1729 *interpreter_frame->register_addr(IdispatchTables) = (intptr_t) Interpreter::dispatch_table(); | |
| 1730 #endif | |
| 1731 | |
| 1732 | |
| 1733 #ifdef ASSERT | |
| 1734 BasicObjectLock* mp = (BasicObjectLock*)monitors; | |
| 1735 | |
| 1736 assert(interpreter_frame->interpreter_frame_method() == method, "method matches"); | |
| 1506 | 1737 assert(interpreter_frame->interpreter_frame_local_at(9) == (intptr_t *)((intptr_t)locals - (9 * Interpreter::stackElementSize)), "locals match"); |
| 0 | 1738 assert(interpreter_frame->interpreter_frame_monitor_end() == mp, "monitor_end matches"); |
| 1739 assert(((intptr_t *)interpreter_frame->interpreter_frame_monitor_begin()) == ((intptr_t *)mp)+monitor_size, "monitor_begin matches"); | |
| 1740 assert(interpreter_frame->interpreter_frame_tos_address()-1 == esp, "esp matches"); | |
| 1741 | |
| 1742 // check bounds | |
| 1743 intptr_t* lo = interpreter_frame->sp() + (frame::memory_parameter_word_sp_offset - 1); | |
| 1744 intptr_t* hi = interpreter_frame->fp() - rounded_vm_local_words; | |
| 1745 assert(lo < monitors && montop <= hi, "monitors in bounds"); | |
| 1746 assert(lo <= esp && esp < monitors, "esp in bounds"); | |
| 1747 #endif // ASSERT | |
| 1748 } | |
| 1749 | |
| 1750 return raw_frame_size; | |
| 1751 } | |
| 1752 | |
| 1753 //---------------------------------------------------------------------------------------------------- | |
| 1754 // Exceptions | |
| 1755 void TemplateInterpreterGenerator::generate_throw_exception() { | |
| 1756 | |
| 1757 // Entry point in previous activation (i.e., if the caller was interpreted) | |
| 1758 Interpreter::_rethrow_exception_entry = __ pc(); | |
| 1759 // O0: exception | |
| 1760 | |
| 1761 // entry point for exceptions thrown within interpreter code | |
| 1762 Interpreter::_throw_exception_entry = __ pc(); | |
| 1763 __ verify_thread(); | |
| 1764 // expression stack is undefined here | |
| 1765 // O0: exception, i.e. Oexception | |
| 1766 // Lbcp: exception bcx | |
| 1767 __ verify_oop(Oexception); | |
| 1768 | |
| 1769 | |
| 1770 // expression stack must be empty before entering the VM in case of an exception | |
| 1771 __ empty_expression_stack(); | |
| 1772 // find exception handler address and preserve exception oop | |
| 1773 // call C routine to find handler and jump to it | |
| 1774 __ call_VM(O1, CAST_FROM_FN_PTR(address, InterpreterRuntime::exception_handler_for_exception), Oexception); | |
| 1775 __ push_ptr(O1); // push exception for exception handler bytecodes | |
| 1776 | |
| 1777 __ JMP(O0, 0); // jump to exception handler (may be remove activation entry!) | |
| 1778 __ delayed()->nop(); | |
| 1779 | |
| 1780 | |
| 1781 // if the exception is not handled in the current frame | |
| 1782 // the frame is removed and the exception is rethrown | |
| 1783 // (i.e. exception continuation is _rethrow_exception) | |
| 1784 // | |
| 1785 // Note: At this point the bci is still the bxi for the instruction which caused | |
| 1786 // the exception and the expression stack is empty. Thus, for any VM calls | |
| 1787 // at this point, GC will find a legal oop map (with empty expression stack). | |
| 1788 | |
| 1789 // in current activation | |
| 1790 // tos: exception | |
| 1791 // Lbcp: exception bcp | |
| 1792 | |
| 1793 // | |
| 1794 // JVMTI PopFrame support | |
| 1795 // | |
| 1796 | |
| 1797 Interpreter::_remove_activation_preserving_args_entry = __ pc(); | |
| 727 | 1798 Address popframe_condition_addr(G2_thread, JavaThread::popframe_condition_offset()); |
| 0 | 1799 // Set the popframe_processing bit in popframe_condition indicating that we are |
| 1800 // currently handling popframe, so that call_VMs that may happen later do not trigger new | |
| 1801 // popframe handling cycles. | |
| 1802 | |
| 1803 __ ld(popframe_condition_addr, G3_scratch); | |
| 1804 __ or3(G3_scratch, JavaThread::popframe_processing_bit, G3_scratch); | |
| 1805 __ stw(G3_scratch, popframe_condition_addr); | |
| 1806 | |
| 1807 // Empty the expression stack, as in normal exception handling | |
| 1808 __ empty_expression_stack(); | |
| 1809 __ unlock_if_synchronized_method(vtos, /* throw_monitor_exception */ false, /* install_monitor_exception */ false); | |
| 1810 | |
| 1811 { | |
| 1812 // Check to see whether we are returning to a deoptimized frame. | |
| 1813 // (The PopFrame call ensures that the caller of the popped frame is | |
| 1814 // either interpreted or compiled and deoptimizes it if compiled.) | |
| 1815 // In this case, we can't call dispatch_next() after the frame is | |
| 1816 // popped, but instead must save the incoming arguments and restore | |
| 1817 // them after deoptimization has occurred. | |
| 1818 // | |
| 1819 // Note that we don't compare the return PC against the | |
| 1820 // deoptimization blob's unpack entry because of the presence of | |
| 1821 // adapter frames in C2. | |
| 1822 Label caller_not_deoptimized; | |
| 1823 __ call_VM_leaf(L7_thread_cache, CAST_FROM_FN_PTR(address, InterpreterRuntime::interpreter_contains), I7); | |
| 3839 | 1824 __ br_notnull_short(O0, Assembler::pt, caller_not_deoptimized); |
| 0 | 1825 |
| 1826 const Register Gtmp1 = G3_scratch; | |
| 1827 const Register Gtmp2 = G1_scratch; | |
| 1828 | |
| 1829 // Compute size of arguments for saving when returning to deoptimized caller | |
| 1830 __ lduh(Lmethod, in_bytes(methodOopDesc::size_of_parameters_offset()), Gtmp1); | |
| 1506 | 1831 __ sll(Gtmp1, Interpreter::logStackElementSize, Gtmp1); |
| 0 | 1832 __ sub(Llocals, Gtmp1, Gtmp2); |
| 1833 __ add(Gtmp2, wordSize, Gtmp2); | |
| 1834 // Save these arguments | |
| 1835 __ call_VM_leaf(L7_thread_cache, CAST_FROM_FN_PTR(address, Deoptimization::popframe_preserve_args), G2_thread, Gtmp1, Gtmp2); | |
| 1836 // Inform deoptimization that it is responsible for restoring these arguments | |
| 1837 __ set(JavaThread::popframe_force_deopt_reexecution_bit, Gtmp1); | |
| 727 | 1838 Address popframe_condition_addr(G2_thread, JavaThread::popframe_condition_offset()); |
| 0 | 1839 __ st(Gtmp1, popframe_condition_addr); |
| 1840 | |
| 1841 // Return from the current method | |
| 1842 // The caller's SP was adjusted upon method entry to accomodate | |
| 1843 // the callee's non-argument locals. Undo that adjustment. | |
| 1844 __ ret(); | |
| 1845 __ delayed()->restore(I5_savedSP, G0, SP); | |
| 1846 | |
| 1847 __ bind(caller_not_deoptimized); | |
| 1848 } | |
| 1849 | |
| 1850 // Clear the popframe condition flag | |
| 1851 __ stw(G0 /* popframe_inactive */, popframe_condition_addr); | |
| 1852 | |
| 1853 // Get out of the current method (how this is done depends on the particular compiler calling | |
| 1854 // convention that the interpreter currently follows) | |
| 1855 // The caller's SP was adjusted upon method entry to accomodate | |
| 1856 // the callee's non-argument locals. Undo that adjustment. | |
| 1857 __ restore(I5_savedSP, G0, SP); | |
| 1858 // The method data pointer was incremented already during | |
| 1859 // call profiling. We have to restore the mdp for the current bcp. | |
| 1860 if (ProfileInterpreter) { | |
| 1861 __ set_method_data_pointer_for_bcp(); | |
| 1862 } | |
| 1863 // Resume bytecode interpretation at the current bcp | |
| 1864 __ dispatch_next(vtos); | |
| 1865 // end of JVMTI PopFrame support | |
| 1866 | |
| 1867 Interpreter::_remove_activation_entry = __ pc(); | |
| 1868 | |
| 1869 // preserve exception over this code sequence (remove activation calls the vm, but oopmaps are not correct here) | |
| 1870 __ pop_ptr(Oexception); // get exception | |
| 1871 | |
| 1872 // Intel has the following comment: | |
| 1873 //// remove the activation (without doing throws on illegalMonitorExceptions) | |
| 1874 // They remove the activation without checking for bad monitor state. | |
| 1875 // %%% We should make sure this is the right semantics before implementing. | |
| 1876 | |
| 1877 // %%% changed set_vm_result_2 to set_vm_result and get_vm_result_2 to get_vm_result. Is there a bug here? | |
| 1878 __ set_vm_result(Oexception); | |
| 1879 __ unlock_if_synchronized_method(vtos, /* throw_monitor_exception */ false); | |
| 1880 | |
| 1881 __ notify_method_exit(false, vtos, InterpreterMacroAssembler::SkipNotifyJVMTI); | |
| 1882 | |
| 1883 __ get_vm_result(Oexception); | |
| 1884 __ verify_oop(Oexception); | |
| 1885 | |
| 1886 const int return_reg_adjustment = frame::pc_return_offset; | |
| 727 | 1887 Address issuing_pc_addr(I7, return_reg_adjustment); |
| 0 | 1888 |
| 1889 // We are done with this activation frame; find out where to go next. | |
| 1890 // The continuation point will be an exception handler, which expects | |
| 1891 // the following registers set up: | |
| 1892 // | |
| 1893 // Oexception: exception | |
| 1894 // Oissuing_pc: the local call that threw exception | |
| 1895 // Other On: garbage | |
| 1896 // In/Ln: the contents of the caller's register window | |
| 1897 // | |
| 1898 // We do the required restore at the last possible moment, because we | |
| 1899 // need to preserve some state across a runtime call. | |
| 1900 // (Remember that the caller activation is unknown--it might not be | |
| 1901 // interpreted, so things like Lscratch are useless in the caller.) | |
| 1902 | |
| 1903 // Although the Intel version uses call_C, we can use the more | |
| 1904 // compact call_VM. (The only real difference on SPARC is a | |
| 1905 // harmlessly ignored [re]set_last_Java_frame, compared with | |
| 1906 // the Intel code which lacks this.) | |
| 1907 __ mov(Oexception, Oexception ->after_save()); // get exception in I0 so it will be on O0 after restore | |
| 1908 __ add(issuing_pc_addr, Oissuing_pc->after_save()); // likewise set I1 to a value local to the caller | |
| 1909 __ super_call_VM_leaf(L7_thread_cache, | |
| 1910 CAST_FROM_FN_PTR(address, SharedRuntime::exception_handler_for_return_address), | |
| 1295 | 1911 G2_thread, Oissuing_pc->after_save()); |
| 0 | 1912 |
| 1913 // The caller's SP was adjusted upon method entry to accomodate | |
| 1914 // the callee's non-argument locals. Undo that adjustment. | |
| 1915 __ JMP(O0, 0); // return exception handler in caller | |
| 1916 __ delayed()->restore(I5_savedSP, G0, SP); | |
| 1917 | |
| 1918 // (same old exception object is already in Oexception; see above) | |
| 1919 // Note that an "issuing PC" is actually the next PC after the call | |
| 1920 } | |
| 1921 | |
| 1922 | |
| 1923 // | |
| 1924 // JVMTI ForceEarlyReturn support | |
| 1925 // | |
| 1926 | |
| 1927 address TemplateInterpreterGenerator::generate_earlyret_entry_for(TosState state) { | |
| 1928 address entry = __ pc(); | |
| 1929 | |
| 1930 __ empty_expression_stack(); | |
| 1931 __ load_earlyret_value(state); | |
| 1932 | |
| 727 | 1933 __ ld_ptr(G2_thread, JavaThread::jvmti_thread_state_offset(), G3_scratch); |
| 1934 Address cond_addr(G3_scratch, JvmtiThreadState::earlyret_state_offset()); | |
| 0 | 1935 |
| 1936 // Clear the earlyret state | |
| 1937 __ stw(G0 /* JvmtiThreadState::earlyret_inactive */, cond_addr); | |
| 1938 | |
| 1939 __ remove_activation(state, | |
| 1940 /* throw_monitor_exception */ false, | |
| 1941 /* install_monitor_exception */ false); | |
| 1942 | |
| 1943 // The caller's SP was adjusted upon method entry to accomodate | |
| 1944 // the callee's non-argument locals. Undo that adjustment. | |
| 1945 __ ret(); // return to caller | |
| 1946 __ delayed()->restore(I5_savedSP, G0, SP); | |
| 1947 | |
| 1948 return entry; | |
| 1949 } // end of JVMTI ForceEarlyReturn support | |
| 1950 | |
| 1951 | |
| 1952 //------------------------------------------------------------------------------------------------------------------------ | |
| 1953 // Helper for vtos entry point generation | |
| 1954 | |
| 1955 void TemplateInterpreterGenerator::set_vtos_entry_points(Template* t, address& bep, address& cep, address& sep, address& aep, address& iep, address& lep, address& fep, address& dep, address& vep) { | |
| 1956 assert(t->is_valid() && t->tos_in() == vtos, "illegal template"); | |
| 1957 Label L; | |
| 3839 | 1958 aep = __ pc(); __ push_ptr(); __ ba_short(L); |
| 1959 fep = __ pc(); __ push_f(); __ ba_short(L); | |
| 1960 dep = __ pc(); __ push_d(); __ ba_short(L); | |
| 1961 lep = __ pc(); __ push_l(); __ ba_short(L); | |
| 0 | 1962 iep = __ pc(); __ push_i(); |
| 1963 bep = cep = sep = iep; // there aren't any | |
| 1964 vep = __ pc(); __ bind(L); // fall through | |
| 1965 generate_and_dispatch(t); | |
| 1966 } | |
| 1967 | |
| 1968 // -------------------------------------------------------------------------------- | |
| 1969 | |
| 1970 | |
| 1971 InterpreterGenerator::InterpreterGenerator(StubQueue* code) | |
| 1972 : TemplateInterpreterGenerator(code) { | |
| 1973 generate_all(); // down here so it can be "virtual" | |
| 1974 } | |
| 1975 | |
| 1976 // -------------------------------------------------------------------------------- | |
| 1977 | |
| 1978 // Non-product code | |
| 1979 #ifndef PRODUCT | |
| 1980 address TemplateInterpreterGenerator::generate_trace_code(TosState state) { | |
| 1981 address entry = __ pc(); | |
| 1982 | |
| 1983 __ push(state); | |
| 1984 __ mov(O7, Lscratch); // protect return address within interpreter | |
| 1985 | |
| 1986 // Pass a 0 (not used in sparc) and the top of stack to the bytecode tracer | |
| 1987 __ mov( Otos_l2, G3_scratch ); | |
| 1988 __ call_VM(noreg, CAST_FROM_FN_PTR(address, SharedRuntime::trace_bytecode), G0, Otos_l1, G3_scratch); | |
| 1989 __ mov(Lscratch, O7); // restore return address | |
| 1990 __ pop(state); | |
| 1991 __ retl(); | |
| 1992 __ delayed()->nop(); | |
| 1993 | |
| 1994 return entry; | |
| 1995 } | |
| 1996 | |
| 1997 | |
| 1998 // helpers for generate_and_dispatch | |
| 1999 | |
| 2000 void TemplateInterpreterGenerator::count_bytecode() { | |
| 727 | 2001 __ inc_counter(&BytecodeCounter::_counter_value, G3_scratch, G4_scratch); |
| 0 | 2002 } |
| 2003 | |
| 2004 | |
| 2005 void TemplateInterpreterGenerator::histogram_bytecode(Template* t) { | |
| 727 | 2006 __ inc_counter(&BytecodeHistogram::_counters[t->bytecode()], G3_scratch, G4_scratch); |
| 0 | 2007 } |
| 2008 | |
| 2009 | |
| 2010 void TemplateInterpreterGenerator::histogram_bytecode_pair(Template* t) { | |
| 727 | 2011 AddressLiteral index (&BytecodePairHistogram::_index); |
| 2012 AddressLiteral counters((address) &BytecodePairHistogram::_counters); | |
| 0 | 2013 |
| 2014 // get index, shift out old bytecode, bring in new bytecode, and store it | |
| 2015 // _index = (_index >> log2_number_of_codes) | | |
| 2016 // (bytecode << log2_number_of_codes); | |
| 2017 | |
| 727 | 2018 __ load_contents(index, G4_scratch); |
| 0 | 2019 __ srl( G4_scratch, BytecodePairHistogram::log2_number_of_codes, G4_scratch ); |
| 2020 __ set( ((int)t->bytecode()) << BytecodePairHistogram::log2_number_of_codes, G3_scratch ); | |
| 2021 __ or3( G3_scratch, G4_scratch, G4_scratch ); | |
| 727 | 2022 __ store_contents(G4_scratch, index, G3_scratch); |
| 0 | 2023 |
| 2024 // bump bucket contents | |
| 2025 // _counters[_index] ++; | |
| 2026 | |
| 727 | 2027 __ set(counters, G3_scratch); // loads into G3_scratch |
| 0 | 2028 __ sll( G4_scratch, LogBytesPerWord, G4_scratch ); // Index is word address |
| 2029 __ add (G3_scratch, G4_scratch, G3_scratch); // Add in index | |
| 2030 __ ld (G3_scratch, 0, G4_scratch); | |
| 2031 __ inc (G4_scratch); | |
| 2032 __ st (G4_scratch, 0, G3_scratch); | |
| 2033 } | |
| 2034 | |
| 2035 | |
| 2036 void TemplateInterpreterGenerator::trace_bytecode(Template* t) { | |
| 2037 // Call a little run-time stub to avoid blow-up for each bytecode. | |
| 2038 // The run-time runtime saves the right registers, depending on | |
| 2039 // the tosca in-state for the given template. | |
| 2040 address entry = Interpreter::trace_code(t->tos_in()); | |
| 2041 guarantee(entry != NULL, "entry must have been generated"); | |
| 2042 __ call(entry, relocInfo::none); | |
| 2043 __ delayed()->nop(); | |
| 2044 } | |
| 2045 | |
| 2046 | |
| 2047 void TemplateInterpreterGenerator::stop_interpreter_at() { | |
| 727 | 2048 AddressLiteral counter(&BytecodeCounter::_counter_value); |
| 2049 __ load_contents(counter, G3_scratch); | |
| 2050 AddressLiteral stop_at(&StopInterpreterAt); | |
| 0 | 2051 __ load_ptr_contents(stop_at, G4_scratch); |
| 2052 __ cmp(G3_scratch, G4_scratch); | |
| 2053 __ breakpoint_trap(Assembler::equal); | |
| 2054 } | |
| 2055 #endif // not PRODUCT | |
| 2056 #endif // !CC_INTERP |