Mercurial > hg > truffle
annotate src/cpu/sparc/vm/templateInterpreter_sparc.cpp @ 17151:e165f4223650
bring MethodData::_trap_hist_limit back in sync with Deoptimization::Reason_LIMIT
author | Andreas Woess <andreas.woess@jku.at> |
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date | Thu, 18 Sep 2014 19:00:23 +0200 |
parents | 4e3b63e7a9f6 |
children | 52b4284cb496 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved. |
0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #include "precompiled.hpp" |
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26 #include "asm/macroAssembler.hpp" |
1972 | 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" | |
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33 #include "oops/methodData.hpp" |
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34 #include "oops/method.hpp" |
1972 | 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" | |
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47 #include "utilities/macros.hpp" |
0 | 48 |
49 #ifndef CC_INTERP | |
50 #ifndef FAST_DISPATCH | |
51 #define FAST_DISPATCH 1 | |
52 #endif | |
53 #undef FAST_DISPATCH | |
54 | |
55 | |
56 // Generation of Interpreter | |
57 // | |
58 // The InterpreterGenerator generates the interpreter into Interpreter::_code. | |
59 | |
60 | |
61 #define __ _masm-> | |
62 | |
63 | |
64 //---------------------------------------------------------------------------------------------------- | |
65 | |
66 | |
67 void InterpreterGenerator::save_native_result(void) { | |
68 // result potentially in O0/O1: save it across calls | |
69 const Address& l_tmp = InterpreterMacroAssembler::l_tmp; | |
70 | |
71 // result potentially in F0/F1: save it across calls | |
72 const Address& d_tmp = InterpreterMacroAssembler::d_tmp; | |
73 | |
74 // save and restore any potential method result value around the unlocking operation | |
75 __ stf(FloatRegisterImpl::D, F0, d_tmp); | |
76 #ifdef _LP64 | |
77 __ stx(O0, l_tmp); | |
78 #else | |
79 __ std(O0, l_tmp); | |
80 #endif | |
81 } | |
82 | |
83 void InterpreterGenerator::restore_native_result(void) { | |
84 const Address& l_tmp = InterpreterMacroAssembler::l_tmp; | |
85 const Address& d_tmp = InterpreterMacroAssembler::d_tmp; | |
86 | |
87 // Restore any method result value | |
88 __ ldf(FloatRegisterImpl::D, d_tmp, F0); | |
89 #ifdef _LP64 | |
90 __ ldx(l_tmp, O0); | |
91 #else | |
92 __ ldd(l_tmp, O0); | |
93 #endif | |
94 } | |
95 | |
96 address TemplateInterpreterGenerator::generate_exception_handler_common(const char* name, const char* message, bool pass_oop) { | |
97 assert(!pass_oop || message == NULL, "either oop or message but not both"); | |
98 address entry = __ pc(); | |
99 // expression stack must be empty before entering the VM if an exception happened | |
100 __ empty_expression_stack(); | |
101 // load exception object | |
102 __ set((intptr_t)name, G3_scratch); | |
103 if (pass_oop) { | |
104 __ call_VM(Oexception, CAST_FROM_FN_PTR(address, InterpreterRuntime::create_klass_exception), G3_scratch, Otos_i); | |
105 } else { | |
106 __ set((intptr_t)message, G4_scratch); | |
107 __ call_VM(Oexception, CAST_FROM_FN_PTR(address, InterpreterRuntime::create_exception), G3_scratch, G4_scratch); | |
108 } | |
109 // throw exception | |
110 assert(Interpreter::throw_exception_entry() != NULL, "generate it first"); | |
727 | 111 AddressLiteral thrower(Interpreter::throw_exception_entry()); |
112 __ jump_to(thrower, G3_scratch); | |
0 | 113 __ delayed()->nop(); |
114 return entry; | |
115 } | |
116 | |
117 address TemplateInterpreterGenerator::generate_ClassCastException_handler() { | |
118 address entry = __ pc(); | |
119 // expression stack must be empty before entering the VM if an exception | |
120 // happened | |
121 __ empty_expression_stack(); | |
122 // load exception object | |
123 __ call_VM(Oexception, | |
124 CAST_FROM_FN_PTR(address, | |
125 InterpreterRuntime::throw_ClassCastException), | |
126 Otos_i); | |
127 __ should_not_reach_here(); | |
128 return entry; | |
129 } | |
130 | |
131 | |
132 address TemplateInterpreterGenerator::generate_ArrayIndexOutOfBounds_handler(const char* name) { | |
133 address entry = __ pc(); | |
134 // expression stack must be empty before entering the VM if an exception happened | |
135 __ empty_expression_stack(); | |
136 // convention: expect aberrant index in register G3_scratch, then shuffle the | |
137 // index to G4_scratch for the VM call | |
138 __ mov(G3_scratch, G4_scratch); | |
139 __ set((intptr_t)name, G3_scratch); | |
140 __ call_VM(Oexception, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_ArrayIndexOutOfBoundsException), G3_scratch, G4_scratch); | |
141 __ should_not_reach_here(); | |
142 return entry; | |
143 } | |
144 | |
145 | |
146 address TemplateInterpreterGenerator::generate_StackOverflowError_handler() { | |
147 address entry = __ pc(); | |
148 // expression stack must be empty before entering the VM if an exception happened | |
149 __ empty_expression_stack(); | |
150 __ call_VM(Oexception, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_StackOverflowError)); | |
151 __ should_not_reach_here(); | |
152 return entry; | |
153 } | |
154 | |
155 | |
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156 address TemplateInterpreterGenerator::generate_return_entry_for(TosState state, int step, size_t index_size) { |
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157 address entry = __ pc(); |
1503 | 158 |
0 | 159 #if !defined(_LP64) && defined(COMPILER2) |
160 // All return values are where we want them, except for Longs. C2 returns | |
161 // longs in G1 in the 32-bit build whereas the interpreter wants them in O0/O1. | |
162 // Since the interpreter will return longs in G1 and O0/O1 in the 32bit | |
163 // build even if we are returning from interpreted we just do a little | |
164 // stupid shuffing. | |
165 // Note: I tried to make c2 return longs in O0/O1 and G1 so we wouldn't have to | |
166 // do this here. Unfortunately if we did a rethrow we'd see an machepilog node | |
167 // first which would move g1 -> O0/O1 and destroy the exception we were throwing. | |
168 | |
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169 if (state == ltos) { |
1503 | 170 __ srl (G1, 0, O1); |
171 __ srlx(G1, 32, O0); | |
0 | 172 } |
1503 | 173 #endif // !_LP64 && COMPILER2 |
0 | 174 |
175 // The callee returns with the stack possibly adjusted by adapter transition | |
176 // We remove that possible adjustment here. | |
177 // All interpreter local registers are untouched. Any result is passed back | |
178 // in the O0/O1 or float registers. Before continuing, the arguments must be | |
179 // popped from the java expression stack; i.e., Lesp must be adjusted. | |
180 | |
181 __ mov(Llast_SP, SP); // Remove any adapter added stack space. | |
182 | |
183 const Register cache = G3_scratch; | |
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184 const Register index = G1_scratch; |
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185 __ get_cache_and_index_at_bcp(cache, index, 1, index_size); |
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186 |
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187 const Register flags = cache; |
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188 __ ld_ptr(cache, ConstantPoolCache::base_offset() + ConstantPoolCacheEntry::flags_offset(), flags); |
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189 const Register parameter_size = flags; |
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190 __ and3(flags, ConstantPoolCacheEntry::parameter_size_mask, parameter_size); // argument size in words |
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191 __ sll(parameter_size, Interpreter::logStackElementSize, parameter_size); // each argument size in bytes |
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192 __ add(Lesp, parameter_size, Lesp); // pop arguments |
0 | 193 __ dispatch_next(state, step); |
194 | |
195 return entry; | |
196 } | |
197 | |
198 | |
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199 address InterpreterGenerator::generate_deopt_entry_for(TosState state, int step) { |
0 | 200 address entry = __ pc(); |
201 __ get_constant_pool_cache(LcpoolCache); // load LcpoolCache | |
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202 #ifdef GRAAL |
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203 // Check if we need to take lock at entry of synchronized method. |
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204 { |
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205 Label L; |
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206 |
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207 //__ cmp(, 0); |
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208 Address pending_monitor_enter_addr(G2_thread, Thread::pending_monitorenter_offset()); |
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209 __ ldbool(pending_monitor_enter_addr, Gtemp); // Load if pending monitor enter |
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210 __ cmp_and_br_short(Gtemp, G0, Assembler::equal, Assembler::pn, L); |
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211 // Clear flag. |
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212 __ stbool(G0, pending_monitor_enter_addr); |
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213 // Take lock. |
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214 lock_method(); |
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215 __ bind(L); |
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216 } |
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217 #endif |
0 | 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 | |
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262 NOT_PRODUCT(__ emit_int32(0);) // marker for disassembly |
0 | 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) { | |
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294 // Note: In tiered we increment either counters in MethodCounters* or in |
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295 // MDO depending if we're profiling or not. |
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296 const Register Rcounters = G3_scratch; |
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297 Label done; |
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298 |
1783 | 299 if (TieredCompilation) { |
300 const int increment = InvocationCounter::count_increment; | |
301 const int mask = ((1 << Tier0InvokeNotifyFreqLog) - 1) << InvocationCounter::count_shift; | |
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302 Label no_mdo; |
1783 | 303 if (ProfileInterpreter) { |
304 // If no method data exists, go to profile_continue. | |
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305 __ ld_ptr(Lmethod, Method::method_data_offset(), G4_scratch); |
3839 | 306 __ br_null_short(G4_scratch, Assembler::pn, no_mdo); |
1783 | 307 // Increment counter |
308 Address mdo_invocation_counter(G4_scratch, | |
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309 in_bytes(MethodData::invocation_counter_offset()) + |
1783 | 310 in_bytes(InvocationCounter::counter_offset())); |
311 __ increment_mask_and_jump(mdo_invocation_counter, increment, mask, | |
312 G3_scratch, Lscratch, | |
313 Assembler::zero, overflow); | |
3839 | 314 __ ba_short(done); |
1783 | 315 } |
0 | 316 |
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317 // Increment counter in MethodCounters* |
1783 | 318 __ bind(no_mdo); |
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319 Address invocation_counter(Rcounters, |
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320 in_bytes(MethodCounters::invocation_counter_offset()) + |
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321 in_bytes(InvocationCounter::counter_offset())); |
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322 __ get_method_counters(Lmethod, Rcounters, done); |
1783 | 323 __ increment_mask_and_jump(invocation_counter, increment, mask, |
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324 G4_scratch, Lscratch, |
1783 | 325 Assembler::zero, overflow); |
326 __ bind(done); | |
327 } else { | |
328 // Update standard invocation counters | |
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329 __ get_method_counters(Lmethod, Rcounters, done); |
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330 __ increment_invocation_counter(Rcounters, O0, G4_scratch); |
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331 if (ProfileInterpreter) { |
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332 Address interpreter_invocation_counter(Rcounters, |
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333 in_bytes(MethodCounters::interpreter_invocation_counter_offset())); |
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334 __ ld(interpreter_invocation_counter, G4_scratch); |
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335 __ inc(G4_scratch); |
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336 __ st(G4_scratch, interpreter_invocation_counter); |
1783 | 337 } |
0 | 338 |
1783 | 339 if (ProfileInterpreter && profile_method != NULL) { |
340 // Test to see if we should create a method data oop | |
341 AddressLiteral profile_limit((address)&InvocationCounter::InterpreterProfileLimit); | |
342 __ load_contents(profile_limit, G3_scratch); | |
3839 | 343 __ cmp_and_br_short(O0, G3_scratch, Assembler::lessUnsigned, Assembler::pn, *profile_method_continue); |
0 | 344 |
1783 | 345 // if no method data exists, go to profile_method |
346 __ test_method_data_pointer(*profile_method); | |
347 } | |
348 | |
349 AddressLiteral invocation_limit((address)&InvocationCounter::InterpreterInvocationLimit); | |
350 __ load_contents(invocation_limit, G3_scratch); | |
351 __ cmp(O0, G3_scratch); | |
3839 | 352 __ br(Assembler::greaterEqualUnsigned, false, Assembler::pn, *overflow); // Far distance |
1783 | 353 __ delayed()->nop(); |
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354 __ bind(done); |
1783 | 355 } |
0 | 356 |
357 } | |
358 | |
359 // Allocate monitor and lock method (asm interpreter) | |
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360 // ebx - Method* |
0 | 361 // |
362 void InterpreterGenerator::lock_method(void) { | |
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363 __ ld(Lmethod, in_bytes(Method::access_flags_offset()), O0); // Load access flags. |
0 | 364 |
365 #ifdef ASSERT | |
366 { Label ok; | |
367 __ btst(JVM_ACC_SYNCHRONIZED, O0); | |
368 __ br( Assembler::notZero, false, Assembler::pt, ok); | |
369 __ delayed()->nop(); | |
370 __ stop("method doesn't need synchronization"); | |
371 __ bind(ok); | |
372 } | |
373 #endif // ASSERT | |
374 | |
375 // get synchronization object to O0 | |
376 { Label done; | |
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377 const int mirror_offset = in_bytes(Klass::java_mirror_offset()); |
0 | 378 __ btst(JVM_ACC_STATIC, O0); |
379 __ br( Assembler::zero, true, Assembler::pt, done); | |
380 __ delayed()->ld_ptr(Llocals, Interpreter::local_offset_in_bytes(0), O0); // get receiver for not-static case | |
381 | |
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382 __ ld_ptr( Lmethod, in_bytes(Method::const_offset()), O0); |
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383 __ ld_ptr( O0, in_bytes(ConstMethod::constants_offset()), O0); |
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384 __ ld_ptr( O0, ConstantPool::pool_holder_offset_in_bytes(), O0); |
0 | 385 |
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386 // lock the mirror, not the Klass* |
0 | 387 __ ld_ptr( O0, mirror_offset, O0); |
388 | |
389 #ifdef ASSERT | |
390 __ tst(O0); | |
5923 | 391 __ breakpoint_trap(Assembler::zero, Assembler::ptr_cc); |
0 | 392 #endif // ASSERT |
393 | |
394 __ bind(done); | |
395 } | |
396 | |
397 __ add_monitor_to_stack(true, noreg, noreg); // allocate monitor elem | |
398 __ st_ptr( O0, Lmonitors, BasicObjectLock::obj_offset_in_bytes()); // store object | |
399 // __ untested("lock_object from method entry"); | |
400 __ lock_object(Lmonitors, O0); | |
401 } | |
402 | |
403 | |
404 void TemplateInterpreterGenerator::generate_stack_overflow_check(Register Rframe_size, | |
405 Register Rscratch, | |
406 Register Rscratch2) { | |
407 const int page_size = os::vm_page_size(); | |
408 Label after_frame_check; | |
409 | |
410 assert_different_registers(Rframe_size, Rscratch, Rscratch2); | |
411 | |
3839 | 412 __ set(page_size, Rscratch); |
413 __ cmp_and_br_short(Rframe_size, Rscratch, Assembler::lessEqual, Assembler::pt, after_frame_check); | |
0 | 414 |
415 // get the stack base, and in debug, verify it is non-zero | |
727 | 416 __ ld_ptr( G2_thread, Thread::stack_base_offset(), Rscratch ); |
0 | 417 #ifdef ASSERT |
418 Label base_not_zero; | |
3839 | 419 __ br_notnull_short(Rscratch, Assembler::pn, base_not_zero); |
0 | 420 __ stop("stack base is zero in generate_stack_overflow_check"); |
421 __ bind(base_not_zero); | |
422 #endif | |
423 | |
424 // get the stack size, and in debug, verify it is non-zero | |
425 assert( sizeof(size_t) == sizeof(intptr_t), "wrong load size" ); | |
727 | 426 __ ld_ptr( G2_thread, Thread::stack_size_offset(), Rscratch2 ); |
0 | 427 #ifdef ASSERT |
428 Label size_not_zero; | |
3839 | 429 __ br_notnull_short(Rscratch2, Assembler::pn, size_not_zero); |
0 | 430 __ stop("stack size is zero in generate_stack_overflow_check"); |
431 __ bind(size_not_zero); | |
432 #endif | |
433 | |
434 // compute the beginning of the protected zone minus the requested frame size | |
435 __ sub( Rscratch, Rscratch2, Rscratch ); | |
436 __ set( (StackRedPages+StackYellowPages) * page_size, Rscratch2 ); | |
437 __ add( Rscratch, Rscratch2, Rscratch ); | |
438 | |
439 // Add in the size of the frame (which is the same as subtracting it from the | |
440 // SP, which would take another register | |
441 __ add( Rscratch, Rframe_size, Rscratch ); | |
442 | |
443 // the frame is greater than one page in size, so check against | |
444 // the bottom of the stack | |
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445 __ cmp_and_brx_short(SP, Rscratch, Assembler::greaterUnsigned, Assembler::pt, after_frame_check); |
0 | 446 |
4743 | 447 // the stack will overflow, throw an exception |
448 | |
449 // Note that SP is restored to sender's sp (in the delay slot). This | |
450 // is necessary if the sender's frame is an extended compiled frame | |
451 // (see gen_c2i_adapter()) and safer anyway in case of JSR292 | |
452 // adaptations. | |
0 | 453 |
4743 | 454 // Note also that the restored frame is not necessarily interpreted. |
455 // Use the shared runtime version of the StackOverflowError. | |
456 assert(StubRoutines::throw_StackOverflowError_entry() != NULL, "stub not yet generated"); | |
457 AddressLiteral stub(StubRoutines::throw_StackOverflowError_entry()); | |
458 __ jump_to(stub, Rscratch); | |
459 __ delayed()->mov(O5_savedSP, SP); | |
0 | 460 |
461 // if you get to here, then there is enough stack space | |
462 __ bind( after_frame_check ); | |
463 } | |
464 | |
465 | |
466 // | |
467 // Generate a fixed interpreter frame. This is identical setup for interpreted | |
468 // methods and for native methods hence the shared code. | |
469 | |
470 void TemplateInterpreterGenerator::generate_fixed_frame(bool native_call) { | |
471 // | |
472 // | |
473 // The entry code sets up a new interpreter frame in 4 steps: | |
474 // | |
475 // 1) Increase caller's SP by for the extra local space needed: | |
476 // (check for overflow) | |
477 // Efficient implementation of xload/xstore bytecodes requires | |
478 // that arguments and non-argument locals are in a contigously | |
479 // addressable memory block => non-argument locals must be | |
480 // allocated in the caller's frame. | |
481 // | |
482 // 2) Create a new stack frame and register window: | |
483 // The new stack frame must provide space for the standard | |
484 // register save area, the maximum java expression stack size, | |
485 // the monitor slots (0 slots initially), and some frame local | |
486 // scratch locations. | |
487 // | |
488 // 3) The following interpreter activation registers must be setup: | |
489 // Lesp : expression stack pointer | |
490 // Lbcp : bytecode pointer | |
491 // Lmethod : method | |
492 // Llocals : locals pointer | |
493 // Lmonitors : monitor pointer | |
494 // LcpoolCache: constant pool cache | |
495 // | |
496 // 4) Initialize the non-argument locals if necessary: | |
497 // Non-argument locals may need to be initialized to NULL | |
498 // for GC to work. If the oop-map information is accurate | |
499 // (in the absence of the JSR problem), no initialization | |
500 // is necessary. | |
501 // | |
502 // (gri - 2/25/2000) | |
503 | |
504 | |
505 int rounded_vm_local_words = round_to( frame::interpreter_frame_vm_local_words, WordsPerLong ); | |
506 | |
507 const int extra_space = | |
508 rounded_vm_local_words + // frame local scratch space | |
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509 Method::extra_stack_entries() + // extra stack for jsr 292 |
0 | 510 frame::memory_parameter_word_sp_offset + // register save area |
511 (native_call ? frame::interpreter_frame_extra_outgoing_argument_words : 0); | |
512 | |
513 const Register Glocals_size = G3; | |
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514 const Register RconstMethod = Glocals_size; |
0 | 515 const Register Otmp1 = O3; |
516 const Register Otmp2 = O4; | |
517 // Lscratch can't be used as a temporary because the call_stub uses | |
518 // it to assert that the stack frame was setup correctly. | |
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519 const Address constMethod (G5_method, Method::const_offset()); |
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520 const Address size_of_parameters(RconstMethod, ConstMethod::size_of_parameters_offset()); |
0 | 521 |
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522 __ ld_ptr( constMethod, RconstMethod ); |
0 | 523 __ lduh( size_of_parameters, Glocals_size); |
524 | |
525 // Gargs points to first local + BytesPerWord | |
526 // Set the saved SP after the register window save | |
527 // | |
528 assert_different_registers(Gargs, Glocals_size, Gframe_size, O5_savedSP); | |
1506 | 529 __ sll(Glocals_size, Interpreter::logStackElementSize, Otmp1); |
0 | 530 __ add(Gargs, Otmp1, Gargs); |
531 | |
532 if (native_call) { | |
533 __ calc_mem_param_words( Glocals_size, Gframe_size ); | |
534 __ add( Gframe_size, extra_space, Gframe_size); | |
535 __ round_to( Gframe_size, WordsPerLong ); | |
536 __ sll( Gframe_size, LogBytesPerWord, Gframe_size ); | |
537 } else { | |
538 | |
539 // | |
540 // Compute number of locals in method apart from incoming parameters | |
541 // | |
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542 const Address size_of_locals (Otmp1, ConstMethod::size_of_locals_offset()); |
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543 __ ld_ptr( constMethod, Otmp1 ); |
0 | 544 __ lduh( size_of_locals, Otmp1 ); |
545 __ sub( Otmp1, Glocals_size, Glocals_size ); | |
546 __ round_to( Glocals_size, WordsPerLong ); | |
1506 | 547 __ sll( Glocals_size, Interpreter::logStackElementSize, Glocals_size ); |
0 | 548 |
549 // see if the frame is greater than one page in size. If so, | |
550 // then we need to verify there is enough stack space remaining | |
551 // Frame_size = (max_stack + extra_space) * BytesPerWord; | |
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552 __ ld_ptr( constMethod, Gframe_size ); |
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553 __ lduh( Gframe_size, in_bytes(ConstMethod::max_stack_offset()), Gframe_size ); |
0 | 554 __ add( Gframe_size, extra_space, Gframe_size ); |
555 __ round_to( Gframe_size, WordsPerLong ); | |
1506 | 556 __ sll( Gframe_size, Interpreter::logStackElementSize, Gframe_size); |
0 | 557 |
558 // Add in java locals size for stack overflow check only | |
559 __ add( Gframe_size, Glocals_size, Gframe_size ); | |
560 | |
561 const Register Otmp2 = O4; | |
562 assert_different_registers(Otmp1, Otmp2, O5_savedSP); | |
563 generate_stack_overflow_check(Gframe_size, Otmp1, Otmp2); | |
564 | |
565 __ sub( Gframe_size, Glocals_size, Gframe_size); | |
566 | |
567 // | |
568 // bump SP to accomodate the extra locals | |
569 // | |
570 __ sub( SP, Glocals_size, SP ); | |
571 } | |
572 | |
573 // | |
574 // now set up a stack frame with the size computed above | |
575 // | |
576 __ neg( Gframe_size ); | |
577 __ save( SP, Gframe_size, SP ); | |
578 | |
579 // | |
580 // now set up all the local cache registers | |
581 // | |
582 // NOTE: At this point, Lbyte_code/Lscratch has been modified. Note | |
583 // that all present references to Lbyte_code initialize the register | |
584 // immediately before use | |
585 if (native_call) { | |
586 __ mov(G0, Lbcp); | |
587 } else { | |
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588 __ ld_ptr(G5_method, Method::const_offset(), Lbcp); |
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589 __ add(Lbcp, in_bytes(ConstMethod::codes_offset()), Lbcp); |
0 | 590 } |
591 __ mov( G5_method, Lmethod); // set Lmethod | |
592 __ get_constant_pool_cache( LcpoolCache ); // set LcpoolCache | |
593 __ sub(FP, rounded_vm_local_words * BytesPerWord, Lmonitors ); // set Lmonitors | |
594 #ifdef _LP64 | |
595 __ add( Lmonitors, STACK_BIAS, Lmonitors ); // Account for 64 bit stack bias | |
596 #endif | |
597 __ sub(Lmonitors, BytesPerWord, Lesp); // set Lesp | |
598 | |
599 // setup interpreter activation registers | |
600 __ sub(Gargs, BytesPerWord, Llocals); // set Llocals | |
601 | |
602 if (ProfileInterpreter) { | |
603 #ifdef FAST_DISPATCH | |
604 // FAST_DISPATCH and ProfileInterpreter are mutually exclusive since | |
605 // they both use I2. | |
606 assert(0, "FAST_DISPATCH and +ProfileInterpreter are mutually exclusive"); | |
607 #endif // FAST_DISPATCH | |
608 __ set_method_data_pointer(); | |
609 } | |
610 | |
611 } | |
612 | |
613 // Empty method, generate a very fast return. | |
614 | |
615 address InterpreterGenerator::generate_empty_entry(void) { | |
616 | |
617 // A method that does nother but return... | |
618 | |
619 address entry = __ pc(); | |
620 Label slow_path; | |
621 | |
622 // do nothing for empty methods (do not even increment invocation counter) | |
623 if ( UseFastEmptyMethods) { | |
624 // If we need a safepoint check, generate full interpreter entry. | |
727 | 625 AddressLiteral sync_state(SafepointSynchronize::address_of_state()); |
626 __ set(sync_state, G3_scratch); | |
3839 | 627 __ cmp_and_br_short(G3_scratch, SafepointSynchronize::_not_synchronized, Assembler::notEqual, Assembler::pn, slow_path); |
0 | 628 |
629 // Code: _return | |
630 __ retl(); | |
631 __ delayed()->mov(O5_savedSP, SP); | |
632 | |
633 __ bind(slow_path); | |
634 (void) generate_normal_entry(false); | |
635 | |
636 return entry; | |
637 } | |
638 return NULL; | |
639 } | |
640 | |
641 // Call an accessor method (assuming it is resolved, otherwise drop into | |
642 // vanilla (slow path) entry | |
643 | |
644 // Generates code to elide accessor methods | |
645 // Uses G3_scratch and G1_scratch as scratch | |
646 address InterpreterGenerator::generate_accessor_entry(void) { | |
647 | |
648 // Code: _aload_0, _(i|a)getfield, _(i|a)return or any rewrites thereof; | |
649 // parameter size = 1 | |
650 // Note: We can only use this code if the getfield has been resolved | |
651 // and if we don't have a null-pointer exception => check for | |
652 // these conditions first and use slow path if necessary. | |
653 address entry = __ pc(); | |
654 Label slow_path; | |
655 | |
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656 |
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657 // XXX: for compressed oops pointer loading and decoding doesn't fit in |
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658 // delay slot and damages G1 |
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659 if ( UseFastAccessorMethods && !UseCompressedOops ) { |
0 | 660 // Check if we need to reach a safepoint and generate full interpreter |
661 // frame if so. | |
727 | 662 AddressLiteral sync_state(SafepointSynchronize::address_of_state()); |
0 | 663 __ load_contents(sync_state, G3_scratch); |
664 __ cmp(G3_scratch, SafepointSynchronize::_not_synchronized); | |
3839 | 665 __ cmp_and_br_short(G3_scratch, SafepointSynchronize::_not_synchronized, Assembler::notEqual, Assembler::pn, slow_path); |
0 | 666 |
667 // Check if local 0 != NULL | |
668 __ ld_ptr(Gargs, G0, Otos_i ); // get local 0 | |
3839 | 669 // check if local 0 == NULL and go the slow path |
670 __ br_null_short(Otos_i, Assembler::pn, slow_path); | |
0 | 671 |
672 | |
673 // read first instruction word and extract bytecode @ 1 and index @ 2 | |
674 // get first 4 bytes of the bytecodes (big endian!) | |
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675 __ ld_ptr(G5_method, Method::const_offset(), G1_scratch); |
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676 __ ld(G1_scratch, ConstMethod::codes_offset(), G1_scratch); |
0 | 677 |
678 // move index @ 2 far left then to the right most two bytes. | |
679 __ sll(G1_scratch, 2*BitsPerByte, G1_scratch); | |
680 __ srl(G1_scratch, 2*BitsPerByte - exact_log2(in_words( | |
681 ConstantPoolCacheEntry::size()) * BytesPerWord), G1_scratch); | |
682 | |
683 // get constant pool cache | |
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684 __ ld_ptr(G5_method, Method::const_offset(), G3_scratch); |
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685 __ ld_ptr(G3_scratch, ConstMethod::constants_offset(), G3_scratch); |
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686 __ ld_ptr(G3_scratch, ConstantPool::cache_offset_in_bytes(), G3_scratch); |
0 | 687 |
688 // get specific constant pool cache entry | |
689 __ add(G3_scratch, G1_scratch, G3_scratch); | |
690 | |
691 // Check the constant Pool cache entry to see if it has been resolved. | |
692 // If not, need the slow path. | |
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693 ByteSize cp_base_offset = ConstantPoolCache::base_offset(); |
727 | 694 __ ld_ptr(G3_scratch, cp_base_offset + ConstantPoolCacheEntry::indices_offset(), G1_scratch); |
0 | 695 __ srl(G1_scratch, 2*BitsPerByte, G1_scratch); |
696 __ and3(G1_scratch, 0xFF, G1_scratch); | |
3839 | 697 __ cmp_and_br_short(G1_scratch, Bytecodes::_getfield, Assembler::notEqual, Assembler::pn, slow_path); |
0 | 698 |
699 // Get the type and return field offset from the constant pool cache | |
727 | 700 __ ld_ptr(G3_scratch, cp_base_offset + ConstantPoolCacheEntry::flags_offset(), G1_scratch); |
701 __ ld_ptr(G3_scratch, cp_base_offset + ConstantPoolCacheEntry::f2_offset(), G3_scratch); | |
0 | 702 |
703 Label xreturn_path; | |
704 // Need to differentiate between igetfield, agetfield, bgetfield etc. | |
705 // because they are different sizes. | |
706 // Get the type from the constant pool cache | |
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707 __ srl(G1_scratch, ConstantPoolCacheEntry::tos_state_shift, G1_scratch); |
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708 // Make sure we don't need to mask G1_scratch after the above shift |
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709 ConstantPoolCacheEntry::verify_tos_state_shift(); |
0 | 710 __ cmp(G1_scratch, atos ); |
711 __ br(Assembler::equal, true, Assembler::pt, xreturn_path); | |
712 __ delayed()->ld_ptr(Otos_i, G3_scratch, Otos_i); | |
713 __ cmp(G1_scratch, itos); | |
714 __ br(Assembler::equal, true, Assembler::pt, xreturn_path); | |
715 __ delayed()->ld(Otos_i, G3_scratch, Otos_i); | |
716 __ cmp(G1_scratch, stos); | |
717 __ br(Assembler::equal, true, Assembler::pt, xreturn_path); | |
718 __ delayed()->ldsh(Otos_i, G3_scratch, Otos_i); | |
719 __ cmp(G1_scratch, ctos); | |
720 __ br(Assembler::equal, true, Assembler::pt, xreturn_path); | |
721 __ delayed()->lduh(Otos_i, G3_scratch, Otos_i); | |
722 #ifdef ASSERT | |
723 __ cmp(G1_scratch, btos); | |
724 __ br(Assembler::equal, true, Assembler::pt, xreturn_path); | |
725 __ delayed()->ldsb(Otos_i, G3_scratch, Otos_i); | |
726 __ should_not_reach_here(); | |
727 #endif | |
728 __ ldsb(Otos_i, G3_scratch, Otos_i); | |
729 __ bind(xreturn_path); | |
730 | |
731 // _ireturn/_areturn | |
732 __ retl(); // return from leaf routine | |
733 __ delayed()->mov(O5_savedSP, SP); | |
734 | |
735 // Generate regular method entry | |
736 __ bind(slow_path); | |
737 (void) generate_normal_entry(false); | |
738 return entry; | |
739 } | |
740 return NULL; | |
741 } | |
742 | |
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743 // Method entry for java.lang.ref.Reference.get. |
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744 address InterpreterGenerator::generate_Reference_get_entry(void) { |
8001
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745 #if INCLUDE_ALL_GCS |
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746 // Code: _aload_0, _getfield, _areturn |
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747 // parameter size = 1 |
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748 // |
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749 // The code that gets generated by this routine is split into 2 parts: |
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750 // 1. The "intrinsified" code for G1 (or any SATB based GC), |
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751 // 2. The slow path - which is an expansion of the regular method entry. |
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752 // |
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753 // Notes:- |
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754 // * In the G1 code we do not check whether we need to block for |
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755 // a safepoint. If G1 is enabled then we must execute the specialized |
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756 // code for Reference.get (except when the Reference object is null) |
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757 // so that we can log the value in the referent field with an SATB |
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758 // update buffer. |
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759 // If the code for the getfield template is modified so that the |
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760 // G1 pre-barrier code is executed when the current method is |
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761 // Reference.get() then going through the normal method entry |
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762 // will be fine. |
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763 // * The G1 code can, however, check the receiver object (the instance |
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764 // of java.lang.Reference) and jump to the slow path if null. If the |
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765 // Reference object is null then we obviously cannot fetch the referent |
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766 // and so we don't need to call the G1 pre-barrier. Thus we can use the |
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767 // regular method entry code to generate the NPE. |
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768 // |
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769 // This code is based on generate_accessor_enty. |
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770 |
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771 address entry = __ pc(); |
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772 |
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773 const int referent_offset = java_lang_ref_Reference::referent_offset; |
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774 guarantee(referent_offset > 0, "referent offset not initialized"); |
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775 |
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776 if (UseG1GC) { |
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777 Label slow_path; |
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778 |
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779 // In the G1 code we don't check if we need to reach a safepoint. We |
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780 // continue and the thread will safepoint at the next bytecode dispatch. |
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781 |
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782 // Check if local 0 != NULL |
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783 // If the receiver is null then it is OK to jump to the slow path. |
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784 __ ld_ptr(Gargs, G0, Otos_i ); // get local 0 |
3839 | 785 // check if local 0 == NULL and go the slow path |
786 __ cmp_and_brx_short(Otos_i, 0, Assembler::equal, Assembler::pn, slow_path); | |
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787 |
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788 |
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789 // Load the value of the referent field. |
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790 if (Assembler::is_simm13(referent_offset)) { |
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791 __ load_heap_oop(Otos_i, referent_offset, Otos_i); |
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792 } else { |
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793 __ set(referent_offset, G3_scratch); |
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794 __ load_heap_oop(Otos_i, G3_scratch, Otos_i); |
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795 } |
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796 |
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797 // Generate the G1 pre-barrier code to log the value of |
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798 // the referent field in an SATB buffer. Note with |
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799 // these parameters the pre-barrier does not generate |
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800 // the load of the previous value |
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801 |
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802 __ g1_write_barrier_pre(noreg /* obj */, noreg /* index */, 0 /* offset */, |
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803 Otos_i /* pre_val */, |
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804 G3_scratch /* tmp */, |
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805 true /* preserve_o_regs */); |
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806 |
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807 // _areturn |
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808 __ retl(); // return from leaf routine |
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809 __ delayed()->mov(O5_savedSP, SP); |
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810 |
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811 // Generate regular method entry |
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812 __ bind(slow_path); |
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813 (void) generate_normal_entry(false); |
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814 return entry; |
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815 } |
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816 #endif // INCLUDE_ALL_GCS |
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817 |
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818 // If G1 is not enabled then attempt to go through the accessor entry point |
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819 // Reference.get is an accessor |
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820 return generate_accessor_entry(); |
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821 } |
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822 |
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823 |
0 | 824 // |
825 // Interpreter stub for calling a native method. (asm interpreter) | |
826 // This sets up a somewhat different looking stack for calling the native method | |
827 // than the typical interpreter frame setup. | |
828 // | |
829 | |
830 address InterpreterGenerator::generate_native_entry(bool synchronized) { | |
831 address entry = __ pc(); | |
832 | |
833 // the following temporary registers are used during frame creation | |
834 const Register Gtmp1 = G3_scratch ; | |
835 const Register Gtmp2 = G1_scratch; | |
836 bool inc_counter = UseCompiler || CountCompiledCalls; | |
837 | |
838 // make sure registers are different! | |
839 assert_different_registers(G2_thread, G5_method, Gargs, Gtmp1, Gtmp2); | |
840 | |
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841 const Address Laccess_flags(Lmethod, Method::access_flags_offset()); |
0 | 842 |
843 const Register Glocals_size = G3; | |
844 assert_different_registers(Glocals_size, G4_scratch, Gframe_size); | |
845 | |
846 // make sure method is native & not abstract | |
847 // rethink these assertions - they can be simplified and shared (gri 2/25/2000) | |
848 #ifdef ASSERT | |
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849 __ ld(G5_method, Method::access_flags_offset(), Gtmp1); |
0 | 850 { |
851 Label L; | |
852 __ btst(JVM_ACC_NATIVE, Gtmp1); | |
853 __ br(Assembler::notZero, false, Assembler::pt, L); | |
854 __ delayed()->nop(); | |
855 __ stop("tried to execute non-native method as native"); | |
856 __ bind(L); | |
857 } | |
858 { Label L; | |
859 __ btst(JVM_ACC_ABSTRACT, Gtmp1); | |
860 __ br(Assembler::zero, false, Assembler::pt, L); | |
861 __ delayed()->nop(); | |
862 __ stop("tried to execute abstract method as non-abstract"); | |
863 __ bind(L); | |
864 } | |
865 #endif // ASSERT | |
866 | |
867 // generate the code to allocate the interpreter stack frame | |
868 generate_fixed_frame(true); | |
869 | |
870 // | |
871 // No locals to initialize for native method | |
872 // | |
873 | |
874 // this slot will be set later, we initialize it to null here just in | |
875 // case we get a GC before the actual value is stored later | |
727 | 876 __ st_ptr(G0, FP, (frame::interpreter_frame_oop_temp_offset * wordSize) + STACK_BIAS); |
0 | 877 |
727 | 878 const Address do_not_unlock_if_synchronized(G2_thread, |
879 JavaThread::do_not_unlock_if_synchronized_offset()); | |
0 | 880 // Since at this point in the method invocation the exception handler |
881 // would try to exit the monitor of synchronized methods which hasn't | |
882 // been entered yet, we set the thread local variable | |
883 // _do_not_unlock_if_synchronized to true. If any exception was thrown by | |
884 // runtime, exception handling i.e. unlock_if_synchronized_method will | |
885 // check this thread local flag. | |
886 // This flag has two effects, one is to force an unwind in the topmost | |
887 // interpreter frame and not perform an unlock while doing so. | |
888 | |
889 __ movbool(true, G3_scratch); | |
890 __ stbool(G3_scratch, do_not_unlock_if_synchronized); | |
891 | |
892 // increment invocation counter and check for overflow | |
893 // | |
894 // Note: checking for negative value instead of overflow | |
895 // so we have a 'sticky' overflow test (may be of | |
896 // importance as soon as we have true MT/MP) | |
897 Label invocation_counter_overflow; | |
898 Label Lcontinue; | |
899 if (inc_counter) { | |
900 generate_counter_incr(&invocation_counter_overflow, NULL, NULL); | |
901 | |
902 } | |
903 __ bind(Lcontinue); | |
904 | |
905 bang_stack_shadow_pages(true); | |
906 | |
907 // reset the _do_not_unlock_if_synchronized flag | |
908 __ stbool(G0, do_not_unlock_if_synchronized); | |
909 | |
910 // check for synchronized methods | |
911 // Must happen AFTER invocation_counter check and stack overflow check, | |
912 // so method is not locked if overflows. | |
913 | |
914 if (synchronized) { | |
915 lock_method(); | |
916 } else { | |
917 #ifdef ASSERT | |
918 { Label ok; | |
919 __ ld(Laccess_flags, O0); | |
920 __ btst(JVM_ACC_SYNCHRONIZED, O0); | |
921 __ br( Assembler::zero, false, Assembler::pt, ok); | |
922 __ delayed()->nop(); | |
923 __ stop("method needs synchronization"); | |
924 __ bind(ok); | |
925 } | |
926 #endif // ASSERT | |
927 } | |
928 | |
929 | |
930 // start execution | |
931 __ verify_thread(); | |
932 | |
933 // JVMTI support | |
934 __ notify_method_entry(); | |
935 | |
936 // native call | |
937 | |
938 // (note that O0 is never an oop--at most it is a handle) | |
939 // It is important not to smash any handles created by this call, | |
940 // until any oop handle in O0 is dereferenced. | |
941 | |
942 // (note that the space for outgoing params is preallocated) | |
943 | |
944 // get signature handler | |
945 { Label L; | |
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946 Address signature_handler(Lmethod, Method::signature_handler_offset()); |
727 | 947 __ ld_ptr(signature_handler, G3_scratch); |
3839 | 948 __ br_notnull_short(G3_scratch, Assembler::pt, L); |
0 | 949 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::prepare_native_call), Lmethod); |
727 | 950 __ ld_ptr(signature_handler, G3_scratch); |
0 | 951 __ bind(L); |
952 } | |
953 | |
954 // Push a new frame so that the args will really be stored in | |
955 // Copy a few locals across so the new frame has the variables | |
956 // we need but these values will be dead at the jni call and | |
957 // therefore not gc volatile like the values in the current | |
958 // frame (Lmethod in particular) | |
959 | |
960 // Flush the method pointer to the register save area | |
961 __ st_ptr(Lmethod, SP, (Lmethod->sp_offset_in_saved_window() * wordSize) + STACK_BIAS); | |
962 __ mov(Llocals, O1); | |
727 | 963 |
0 | 964 // calculate where the mirror handle body is allocated in the interpreter frame: |
727 | 965 __ add(FP, (frame::interpreter_frame_oop_temp_offset * wordSize) + STACK_BIAS, O2); |
0 | 966 |
967 // Calculate current frame size | |
968 __ sub(SP, FP, O3); // Calculate negative of current frame size | |
969 __ save(SP, O3, SP); // Allocate an identical sized frame | |
970 | |
971 // Note I7 has leftover trash. Slow signature handler will fill it in | |
972 // should we get there. Normal jni call will set reasonable last_Java_pc | |
973 // below (and fix I7 so the stack trace doesn't have a meaningless frame | |
974 // in it). | |
975 | |
976 // Load interpreter frame's Lmethod into same register here | |
977 | |
978 __ ld_ptr(FP, (Lmethod->sp_offset_in_saved_window() * wordSize) + STACK_BIAS, Lmethod); | |
979 | |
980 __ mov(I1, Llocals); | |
981 __ mov(I2, Lscratch2); // save the address of the mirror | |
982 | |
983 | |
984 // ONLY Lmethod and Llocals are valid here! | |
985 | |
986 // call signature handler, It will move the arg properly since Llocals in current frame | |
987 // matches that in outer frame | |
988 | |
989 __ callr(G3_scratch, 0); | |
990 __ delayed()->nop(); | |
991 | |
992 // Result handler is in Lscratch | |
993 | |
994 // Reload interpreter frame's Lmethod since slow signature handler may block | |
995 __ ld_ptr(FP, (Lmethod->sp_offset_in_saved_window() * wordSize) + STACK_BIAS, Lmethod); | |
996 | |
997 { Label not_static; | |
998 | |
999 __ ld(Laccess_flags, O0); | |
1000 __ btst(JVM_ACC_STATIC, O0); | |
1001 __ br( Assembler::zero, false, Assembler::pt, not_static); | |
727 | 1002 // get native function entry point(O0 is a good temp until the very end) |
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1003 __ delayed()->ld_ptr(Lmethod, in_bytes(Method::native_function_offset()), O0); |
0 | 1004 // for static methods insert the mirror argument |
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1005 const int mirror_offset = in_bytes(Klass::java_mirror_offset()); |
0 | 1006 |
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1007 __ ld_ptr(Lmethod, Method:: const_offset(), O1); |
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1008 __ ld_ptr(O1, ConstMethod::constants_offset(), O1); |
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1009 __ ld_ptr(O1, ConstantPool::pool_holder_offset_in_bytes(), O1); |
0 | 1010 __ ld_ptr(O1, mirror_offset, O1); |
1011 #ifdef ASSERT | |
1012 if (!PrintSignatureHandlers) // do not dirty the output with this | |
1013 { Label L; | |
3839 | 1014 __ br_notnull_short(O1, Assembler::pt, L); |
0 | 1015 __ stop("mirror is missing"); |
1016 __ bind(L); | |
1017 } | |
1018 #endif // ASSERT | |
1019 __ st_ptr(O1, Lscratch2, 0); | |
1020 __ mov(Lscratch2, O1); | |
1021 __ bind(not_static); | |
1022 } | |
1023 | |
1024 // At this point, arguments have been copied off of stack into | |
1025 // their JNI positions, which are O1..O5 and SP[68..]. | |
1026 // Oops are boxed in-place on the stack, with handles copied to arguments. | |
1027 // The result handler is in Lscratch. O0 will shortly hold the JNIEnv*. | |
1028 | |
1029 #ifdef ASSERT | |
1030 { Label L; | |
3839 | 1031 __ br_notnull_short(O0, Assembler::pt, L); |
0 | 1032 __ stop("native entry point is missing"); |
1033 __ bind(L); | |
1034 } | |
1035 #endif // ASSERT | |
1036 | |
1037 // | |
1038 // setup the frame anchor | |
1039 // | |
1040 // The scavenge function only needs to know that the PC of this frame is | |
1041 // in the interpreter method entry code, it doesn't need to know the exact | |
1042 // PC and hence we can use O7 which points to the return address from the | |
1043 // previous call in the code stream (signature handler function) | |
1044 // | |
1045 // The other trick is we set last_Java_sp to FP instead of the usual SP because | |
1046 // we have pushed the extra frame in order to protect the volatile register(s) | |
1047 // in that frame when we return from the jni call | |
1048 // | |
1049 | |
1050 __ set_last_Java_frame(FP, O7); | |
1051 __ mov(O7, I7); // make dummy interpreter frame look like one above, | |
1052 // not meaningless information that'll confuse me. | |
1053 | |
1054 // flush the windows now. We don't care about the current (protection) frame | |
1055 // only the outer frames | |
1056 | |
10997 | 1057 __ flushw(); |
0 | 1058 |
1059 // mark windows as flushed | |
727 | 1060 Address flags(G2_thread, JavaThread::frame_anchor_offset() + JavaFrameAnchor::flags_offset()); |
0 | 1061 __ set(JavaFrameAnchor::flushed, G3_scratch); |
1062 __ st(G3_scratch, flags); | |
1063 | |
1064 // Transition from _thread_in_Java to _thread_in_native. We are already safepoint ready. | |
1065 | |
727 | 1066 Address thread_state(G2_thread, JavaThread::thread_state_offset()); |
0 | 1067 #ifdef ASSERT |
1068 { Label L; | |
1069 __ ld(thread_state, G3_scratch); | |
3839 | 1070 __ cmp_and_br_short(G3_scratch, _thread_in_Java, Assembler::equal, Assembler::pt, L); |
0 | 1071 __ stop("Wrong thread state in native stub"); |
1072 __ bind(L); | |
1073 } | |
1074 #endif // ASSERT | |
1075 __ set(_thread_in_native, G3_scratch); | |
1076 __ st(G3_scratch, thread_state); | |
1077 | |
1078 // Call the jni method, using the delay slot to set the JNIEnv* argument. | |
1079 __ save_thread(L7_thread_cache); // save Gthread | |
1080 __ callr(O0, 0); | |
1081 __ delayed()-> | |
1082 add(L7_thread_cache, in_bytes(JavaThread::jni_environment_offset()), O0); | |
1083 | |
1084 // Back from jni method Lmethod in this frame is DEAD, DEAD, DEAD | |
1085 | |
1086 __ restore_thread(L7_thread_cache); // restore G2_thread | |
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1087 __ reinit_heapbase(); |
0 | 1088 |
1089 // must we block? | |
1090 | |
1091 // Block, if necessary, before resuming in _thread_in_Java state. | |
1092 // In order for GC to work, don't clear the last_Java_sp until after blocking. | |
1093 { Label no_block; | |
727 | 1094 AddressLiteral sync_state(SafepointSynchronize::address_of_state()); |
0 | 1095 |
1096 // Switch thread to "native transition" state before reading the synchronization state. | |
1097 // This additional state is necessary because reading and testing the synchronization | |
1098 // state is not atomic w.r.t. GC, as this scenario demonstrates: | |
1099 // Java thread A, in _thread_in_native state, loads _not_synchronized and is preempted. | |
1100 // VM thread changes sync state to synchronizing and suspends threads for GC. | |
1101 // Thread A is resumed to finish this native method, but doesn't block here since it | |
1102 // didn't see any synchronization is progress, and escapes. | |
1103 __ set(_thread_in_native_trans, G3_scratch); | |
1104 __ st(G3_scratch, thread_state); | |
1105 if(os::is_MP()) { | |
1106 if (UseMembar) { | |
1107 // Force this write out before the read below | |
1108 __ membar(Assembler::StoreLoad); | |
1109 } else { | |
1110 // Write serialization page so VM thread can do a pseudo remote membar. | |
1111 // We use the current thread pointer to calculate a thread specific | |
1112 // offset to write to within the page. This minimizes bus traffic | |
1113 // due to cache line collision. | |
1114 __ serialize_memory(G2_thread, G1_scratch, G3_scratch); | |
1115 } | |
1116 } | |
1117 __ load_contents(sync_state, G3_scratch); | |
1118 __ cmp(G3_scratch, SafepointSynchronize::_not_synchronized); | |
1119 | |
1120 Label L; | |
1121 __ br(Assembler::notEqual, false, Assembler::pn, L); | |
727 | 1122 __ delayed()->ld(G2_thread, JavaThread::suspend_flags_offset(), G3_scratch); |
3839 | 1123 __ cmp_and_br_short(G3_scratch, 0, Assembler::equal, Assembler::pt, no_block); |
0 | 1124 __ bind(L); |
1125 | |
1126 // Block. Save any potential method result value before the operation and | |
1127 // use a leaf call to leave the last_Java_frame setup undisturbed. | |
1128 save_native_result(); | |
1129 __ call_VM_leaf(L7_thread_cache, | |
1130 CAST_FROM_FN_PTR(address, JavaThread::check_special_condition_for_native_trans), | |
1131 G2_thread); | |
1132 | |
1133 // Restore any method result value | |
1134 restore_native_result(); | |
1135 __ bind(no_block); | |
1136 } | |
1137 | |
1138 // Clear the frame anchor now | |
1139 | |
1140 __ reset_last_Java_frame(); | |
1141 | |
1142 // Move the result handler address | |
1143 __ mov(Lscratch, G3_scratch); | |
1144 // return possible result to the outer frame | |
1145 #ifndef __LP64 | |
1146 __ mov(O0, I0); | |
1147 __ restore(O1, G0, O1); | |
1148 #else | |
1149 __ restore(O0, G0, O0); | |
1150 #endif /* __LP64 */ | |
1151 | |
1152 // Move result handler to expected register | |
1153 __ mov(G3_scratch, Lscratch); | |
1154 | |
1155 // Back in normal (native) interpreter frame. State is thread_in_native_trans | |
1156 // switch to thread_in_Java. | |
1157 | |
1158 __ set(_thread_in_Java, G3_scratch); | |
1159 __ st(G3_scratch, thread_state); | |
1160 | |
1161 // reset handle block | |
727 | 1162 __ ld_ptr(G2_thread, JavaThread::active_handles_offset(), G3_scratch); |
0 | 1163 __ st_ptr(G0, G3_scratch, JNIHandleBlock::top_offset_in_bytes()); |
1164 | |
1165 // If we have an oop result store it where it will be safe for any further gc | |
1166 // until we return now that we've released the handle it might be protected by | |
1167 | |
1168 { | |
1169 Label no_oop, store_result; | |
1170 | |
1171 __ set((intptr_t)AbstractInterpreter::result_handler(T_OBJECT), G3_scratch); | |
3839 | 1172 __ cmp_and_brx_short(G3_scratch, Lscratch, Assembler::notEqual, Assembler::pt, no_oop); |
0 | 1173 __ addcc(G0, O0, O0); |
1174 __ brx(Assembler::notZero, true, Assembler::pt, store_result); // if result is not NULL: | |
1175 __ delayed()->ld_ptr(O0, 0, O0); // unbox it | |
1176 __ mov(G0, O0); | |
1177 | |
1178 __ bind(store_result); | |
1179 // Store it where gc will look for it and result handler expects it. | |
1180 __ st_ptr(O0, FP, (frame::interpreter_frame_oop_temp_offset*wordSize) + STACK_BIAS); | |
1181 | |
1182 __ bind(no_oop); | |
1183 | |
1184 } | |
1185 | |
1186 | |
1187 // handle exceptions (exception handling will handle unlocking!) | |
1188 { Label L; | |
727 | 1189 Address exception_addr(G2_thread, Thread::pending_exception_offset()); |
0 | 1190 __ ld_ptr(exception_addr, Gtemp); |
3839 | 1191 __ br_null_short(Gtemp, Assembler::pt, L); |
0 | 1192 // Note: This could be handled more efficiently since we know that the native |
1193 // method doesn't have an exception handler. We could directly return | |
1194 // to the exception handler for the caller. | |
1195 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_pending_exception)); | |
1196 __ should_not_reach_here(); | |
1197 __ bind(L); | |
1198 } | |
1199 | |
1200 // JVMTI support (preserves thread register) | |
1201 __ notify_method_exit(true, ilgl, InterpreterMacroAssembler::NotifyJVMTI); | |
1202 | |
1203 if (synchronized) { | |
1204 // save and restore any potential method result value around the unlocking operation | |
1205 save_native_result(); | |
1206 | |
1207 __ add( __ top_most_monitor(), O1); | |
1208 __ unlock_object(O1); | |
1209 | |
1210 restore_native_result(); | |
1211 } | |
1212 | |
1213 #if defined(COMPILER2) && !defined(_LP64) | |
1214 | |
1215 // C2 expects long results in G1 we can't tell if we're returning to interpreted | |
1216 // or compiled so just be safe. | |
1217 | |
1218 __ sllx(O0, 32, G1); // Shift bits into high G1 | |
1219 __ srl (O1, 0, O1); // Zero extend O1 | |
1220 __ or3 (O1, G1, G1); // OR 64 bits into G1 | |
1221 | |
1222 #endif /* COMPILER2 && !_LP64 */ | |
1223 | |
1224 // dispose of return address and remove activation | |
1225 #ifdef ASSERT | |
1226 { | |
1227 Label ok; | |
3839 | 1228 __ cmp_and_brx_short(I5_savedSP, FP, Assembler::greaterEqualUnsigned, Assembler::pt, ok); |
0 | 1229 __ stop("bad I5_savedSP value"); |
1230 __ should_not_reach_here(); | |
1231 __ bind(ok); | |
1232 } | |
1233 #endif | |
1234 if (TraceJumps) { | |
1235 // Move target to register that is recordable | |
1236 __ mov(Lscratch, G3_scratch); | |
1237 __ JMP(G3_scratch, 0); | |
1238 } else { | |
1239 __ jmp(Lscratch, 0); | |
1240 } | |
1241 __ delayed()->nop(); | |
1242 | |
1243 | |
1244 if (inc_counter) { | |
1245 // handle invocation counter overflow | |
1246 __ bind(invocation_counter_overflow); | |
1247 generate_counter_overflow(Lcontinue); | |
1248 } | |
1249 | |
1250 | |
1251 | |
1252 return entry; | |
1253 } | |
1254 | |
1255 | |
1256 // Generic method entry to (asm) interpreter | |
1257 //------------------------------------------------------------------------------------------------------------------------ | |
1258 // | |
1259 address InterpreterGenerator::generate_normal_entry(bool synchronized) { | |
1260 address entry = __ pc(); | |
1261 | |
1262 bool inc_counter = UseCompiler || CountCompiledCalls; | |
1263 | |
1264 // the following temporary registers are used during frame creation | |
1265 const Register Gtmp1 = G3_scratch ; | |
1266 const Register Gtmp2 = G1_scratch; | |
1267 | |
1268 // make sure registers are different! | |
1269 assert_different_registers(G2_thread, G5_method, Gargs, Gtmp1, Gtmp2); | |
1270 | |
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1271 const Address constMethod (G5_method, Method::const_offset()); |
0 | 1272 // Seems like G5_method is live at the point this is used. So we could make this look consistent |
1273 // and use in the asserts. | |
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1274 const Address access_flags (Lmethod, Method::access_flags_offset()); |
0 | 1275 |
1276 const Register Glocals_size = G3; | |
1277 assert_different_registers(Glocals_size, G4_scratch, Gframe_size); | |
1278 | |
1279 // make sure method is not native & not abstract | |
1280 // rethink these assertions - they can be simplified and shared (gri 2/25/2000) | |
1281 #ifdef ASSERT | |
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1282 __ ld(G5_method, Method::access_flags_offset(), Gtmp1); |
0 | 1283 { |
1284 Label L; | |
1285 __ btst(JVM_ACC_NATIVE, Gtmp1); | |
1286 __ br(Assembler::zero, false, Assembler::pt, L); | |
1287 __ delayed()->nop(); | |
1288 __ stop("tried to execute native method as non-native"); | |
1289 __ bind(L); | |
1290 } | |
1291 { Label L; | |
1292 __ btst(JVM_ACC_ABSTRACT, Gtmp1); | |
1293 __ br(Assembler::zero, false, Assembler::pt, L); | |
1294 __ delayed()->nop(); | |
1295 __ stop("tried to execute abstract method as non-abstract"); | |
1296 __ bind(L); | |
1297 } | |
1298 #endif // ASSERT | |
1299 | |
1300 // generate the code to allocate the interpreter stack frame | |
1301 | |
1302 generate_fixed_frame(false); | |
1303 | |
1304 #ifdef FAST_DISPATCH | |
1305 __ set((intptr_t)Interpreter::dispatch_table(), IdispatchTables); | |
1306 // set bytecode dispatch table base | |
1307 #endif | |
1308 | |
1309 // | |
1310 // Code to initialize the extra (i.e. non-parm) locals | |
1311 // | |
1312 Register init_value = noreg; // will be G0 if we must clear locals | |
1313 // The way the code was setup before zerolocals was always true for vanilla java entries. | |
1314 // It could only be false for the specialized entries like accessor or empty which have | |
1315 // no extra locals so the testing was a waste of time and the extra locals were always | |
1316 // initialized. We removed this extra complication to already over complicated code. | |
1317 | |
1318 init_value = G0; | |
1319 Label clear_loop; | |
1320 | |
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1321 const Register RconstMethod = O1; |
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1322 const Address size_of_parameters(RconstMethod, ConstMethod::size_of_parameters_offset()); |
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1323 const Address size_of_locals (RconstMethod, ConstMethod::size_of_locals_offset()); |
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1324 |
0 | 1325 // NOTE: If you change the frame layout, this code will need to |
1326 // be updated! | |
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1327 __ ld_ptr( constMethod, RconstMethod ); |
0 | 1328 __ lduh( size_of_locals, O2 ); |
1329 __ lduh( size_of_parameters, O1 ); | |
1506 | 1330 __ sll( O2, Interpreter::logStackElementSize, O2); |
1331 __ sll( O1, Interpreter::logStackElementSize, O1 ); | |
0 | 1332 __ sub( Llocals, O2, O2 ); |
1333 __ sub( Llocals, O1, O1 ); | |
1334 | |
1335 __ bind( clear_loop ); | |
1336 __ inc( O2, wordSize ); | |
1337 | |
1338 __ cmp( O2, O1 ); | |
1339 __ brx( Assembler::lessEqualUnsigned, true, Assembler::pt, clear_loop ); | |
1340 __ delayed()->st_ptr( init_value, O2, 0 ); | |
1341 | |
727 | 1342 const Address do_not_unlock_if_synchronized(G2_thread, |
1343 JavaThread::do_not_unlock_if_synchronized_offset()); | |
0 | 1344 // Since at this point in the method invocation the exception handler |
1345 // would try to exit the monitor of synchronized methods which hasn't | |
1346 // been entered yet, we set the thread local variable | |
1347 // _do_not_unlock_if_synchronized to true. If any exception was thrown by | |
1348 // runtime, exception handling i.e. unlock_if_synchronized_method will | |
1349 // check this thread local flag. | |
1350 __ movbool(true, G3_scratch); | |
1351 __ stbool(G3_scratch, do_not_unlock_if_synchronized); | |
1352 | |
1353 // increment invocation counter and check for overflow | |
1354 // | |
1355 // Note: checking for negative value instead of overflow | |
1356 // so we have a 'sticky' overflow test (may be of | |
1357 // importance as soon as we have true MT/MP) | |
1358 Label invocation_counter_overflow; | |
1359 Label profile_method; | |
1360 Label profile_method_continue; | |
1361 Label Lcontinue; | |
1362 if (inc_counter) { | |
1363 generate_counter_incr(&invocation_counter_overflow, &profile_method, &profile_method_continue); | |
1364 if (ProfileInterpreter) { | |
1365 __ bind(profile_method_continue); | |
1366 } | |
1367 } | |
1368 __ bind(Lcontinue); | |
1369 | |
1370 bang_stack_shadow_pages(false); | |
1371 | |
1372 // reset the _do_not_unlock_if_synchronized flag | |
1373 __ stbool(G0, do_not_unlock_if_synchronized); | |
1374 | |
1375 // check for synchronized methods | |
1376 // Must happen AFTER invocation_counter check and stack overflow check, | |
1377 // so method is not locked if overflows. | |
1378 | |
1379 if (synchronized) { | |
1380 lock_method(); | |
1381 } else { | |
1382 #ifdef ASSERT | |
1383 { Label ok; | |
1384 __ ld(access_flags, O0); | |
1385 __ btst(JVM_ACC_SYNCHRONIZED, O0); | |
1386 __ br( Assembler::zero, false, Assembler::pt, ok); | |
1387 __ delayed()->nop(); | |
1388 __ stop("method needs synchronization"); | |
1389 __ bind(ok); | |
1390 } | |
1391 #endif // ASSERT | |
1392 } | |
1393 | |
1394 // start execution | |
1395 | |
1396 __ verify_thread(); | |
1397 | |
1398 // jvmti support | |
1399 __ notify_method_entry(); | |
1400 | |
1401 // start executing instructions | |
1402 __ dispatch_next(vtos); | |
1403 | |
1404 | |
1405 if (inc_counter) { | |
1406 if (ProfileInterpreter) { | |
1407 // We have decided to profile this method in the interpreter | |
1408 __ bind(profile_method); | |
1409 | |
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1410 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::profile_method)); |
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1411 __ set_method_data_pointer_for_bcp(); |
3839 | 1412 __ ba_short(profile_method_continue); |
0 | 1413 } |
1414 | |
1415 // handle invocation counter overflow | |
1416 __ bind(invocation_counter_overflow); | |
1417 generate_counter_overflow(Lcontinue); | |
1418 } | |
1419 | |
1420 | |
1421 return entry; | |
1422 } | |
1423 | |
1424 | |
1425 //---------------------------------------------------------------------------------------------------- | |
1426 // Entry points & stack frame layout | |
1427 // | |
1428 // Here we generate the various kind of entries into the interpreter. | |
1429 // The two main entry type are generic bytecode methods and native call method. | |
1430 // These both come in synchronized and non-synchronized versions but the | |
1431 // frame layout they create is very similar. The other method entry | |
1432 // types are really just special purpose entries that are really entry | |
1433 // and interpretation all in one. These are for trivial methods like | |
1434 // accessor, empty, or special math methods. | |
1435 // | |
1436 // When control flow reaches any of the entry types for the interpreter | |
1437 // the following holds -> | |
1438 // | |
1439 // C2 Calling Conventions: | |
1440 // | |
1441 // The entry code below assumes that the following registers are set | |
1442 // when coming in: | |
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1443 // G5_method: holds the Method* of the method to call |
0 | 1444 // Lesp: points to the TOS of the callers expression stack |
1445 // after having pushed all the parameters | |
1446 // | |
1447 // The entry code does the following to setup an interpreter frame | |
1448 // pop parameters from the callers stack by adjusting Lesp | |
1449 // set O0 to Lesp | |
1450 // compute X = (max_locals - num_parameters) | |
1451 // bump SP up by X to accomadate the extra locals | |
1452 // compute X = max_expression_stack | |
1453 // + vm_local_words | |
1454 // + 16 words of register save area | |
1455 // save frame doing a save sp, -X, sp growing towards lower addresses | |
1456 // set Lbcp, Lmethod, LcpoolCache | |
1457 // set Llocals to i0 | |
1458 // set Lmonitors to FP - rounded_vm_local_words | |
1459 // set Lesp to Lmonitors - 4 | |
1460 // | |
1461 // The frame has now been setup to do the rest of the entry code | |
1462 | |
1463 // Try this optimization: Most method entries could live in a | |
1464 // "one size fits all" stack frame without all the dynamic size | |
1465 // calculations. It might be profitable to do all this calculation | |
1466 // statically and approximately for "small enough" methods. | |
1467 | |
1468 //----------------------------------------------------------------------------------------------- | |
1469 | |
1470 // C1 Calling conventions | |
1471 // | |
1472 // Upon method entry, the following registers are setup: | |
1473 // | |
1474 // g2 G2_thread: current thread | |
1475 // g5 G5_method: method to activate | |
1476 // g4 Gargs : pointer to last argument | |
1477 // | |
1478 // | |
1479 // Stack: | |
1480 // | |
1481 // +---------------+ <--- sp | |
1482 // | | | |
1483 // : reg save area : | |
1484 // | | | |
1485 // +---------------+ <--- sp + 0x40 | |
1486 // | | | |
1487 // : extra 7 slots : note: these slots are not really needed for the interpreter (fix later) | |
1488 // | | | |
1489 // +---------------+ <--- sp + 0x5c | |
1490 // | | | |
1491 // : free : | |
1492 // | | | |
1493 // +---------------+ <--- Gargs | |
1494 // | | | |
1495 // : arguments : | |
1496 // | | | |
1497 // +---------------+ | |
1498 // | | | |
1499 // | |
1500 // | |
1501 // | |
1502 // AFTER FRAME HAS BEEN SETUP for method interpretation the stack looks like: | |
1503 // | |
1504 // +---------------+ <--- sp | |
1505 // | | | |
1506 // : reg save area : | |
1507 // | | | |
1508 // +---------------+ <--- sp + 0x40 | |
1509 // | | | |
1510 // : extra 7 slots : note: these slots are not really needed for the interpreter (fix later) | |
1511 // | | | |
1512 // +---------------+ <--- sp + 0x5c | |
1513 // | | | |
1514 // : : | |
1515 // | | <--- Lesp | |
1516 // +---------------+ <--- Lmonitors (fp - 0x18) | |
1517 // | VM locals | | |
1518 // +---------------+ <--- fp | |
1519 // | | | |
1520 // : reg save area : | |
1521 // | | | |
1522 // +---------------+ <--- fp + 0x40 | |
1523 // | | | |
1524 // : extra 7 slots : note: these slots are not really needed for the interpreter (fix later) | |
1525 // | | | |
1526 // +---------------+ <--- fp + 0x5c | |
1527 // | | | |
1528 // : free : | |
1529 // | | | |
1530 // +---------------+ | |
1531 // | | | |
1532 // : nonarg locals : | |
1533 // | | | |
1534 // +---------------+ | |
1535 // | | | |
1536 // : arguments : | |
1537 // | | <--- Llocals | |
1538 // +---------------+ <--- Gargs | |
1539 // | | | |
1540 | |
1541 static int size_activation_helper(int callee_extra_locals, int max_stack, int monitor_size) { | |
1542 | |
1543 // Figure out the size of an interpreter frame (in words) given that we have a fully allocated | |
1544 // expression stack, the callee will have callee_extra_locals (so we can account for | |
1545 // frame extension) and monitor_size for monitors. Basically we need to calculate | |
1546 // this exactly like generate_fixed_frame/generate_compute_interpreter_state. | |
1547 // | |
1548 // | |
1549 // The big complicating thing here is that we must ensure that the stack stays properly | |
1550 // aligned. This would be even uglier if monitor size wasn't modulo what the stack | |
1551 // needs to be aligned for). We are given that the sp (fp) is already aligned by | |
1552 // the caller so we must ensure that it is properly aligned for our callee. | |
1553 // | |
1554 const int rounded_vm_local_words = | |
1555 round_to(frame::interpreter_frame_vm_local_words,WordsPerLong); | |
1556 // callee_locals and max_stack are counts, not the size in frame. | |
1557 const int locals_size = | |
1506 | 1558 round_to(callee_extra_locals * Interpreter::stackElementWords, WordsPerLong); |
1559 const int max_stack_words = max_stack * Interpreter::stackElementWords; | |
0 | 1560 return (round_to((max_stack_words |
1561 + rounded_vm_local_words | |
1562 + frame::memory_parameter_word_sp_offset), WordsPerLong) | |
1563 // already rounded | |
1564 + locals_size + monitor_size); | |
1565 } | |
1566 | |
1567 // How much stack a method top interpreter activation needs in words. | |
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1568 int AbstractInterpreter::size_top_interpreter_activation(Method* method) { |
0 | 1569 |
1570 // See call_stub code | |
1571 int call_stub_size = round_to(7 + frame::memory_parameter_word_sp_offset, | |
1572 WordsPerLong); // 7 + register save area | |
1573 | |
1574 // Save space for one monitor to get into the interpreted method in case | |
1575 // the method is synchronized | |
1576 int monitor_size = method->is_synchronized() ? | |
1577 1*frame::interpreter_frame_monitor_size() : 0; | |
1578 return size_activation_helper(method->max_locals(), method->max_stack(), | |
1579 monitor_size) + call_stub_size; | |
1580 } | |
1581 | |
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1582 int AbstractInterpreter::layout_activation(Method* method, |
0 | 1583 int tempcount, |
1584 int popframe_extra_args, | |
1585 int moncount, | |
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1586 int caller_actual_parameters, |
0 | 1587 int callee_param_count, |
1588 int callee_local_count, | |
1589 frame* caller, | |
1590 frame* interpreter_frame, | |
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1591 bool is_top_frame, |
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1592 bool is_bottom_frame) { |
0 | 1593 // Note: This calculation must exactly parallel the frame setup |
1594 // in InterpreterGenerator::generate_fixed_frame. | |
1595 // If f!=NULL, set up the following variables: | |
1596 // - Lmethod | |
1597 // - Llocals | |
1598 // - Lmonitors (to the indicated number of monitors) | |
1599 // - Lesp (to the indicated number of temps) | |
1600 // The frame f (if not NULL) on entry is a description of the caller of the frame | |
1601 // we are about to layout. We are guaranteed that we will be able to fill in a | |
1602 // new interpreter frame as its callee (i.e. the stack space is allocated and | |
1603 // the amount was determined by an earlier call to this method with f == NULL). | |
1604 // On return f (if not NULL) while describe the interpreter frame we just layed out. | |
1605 | |
1606 int monitor_size = moncount * frame::interpreter_frame_monitor_size(); | |
1607 int rounded_vm_local_words = round_to(frame::interpreter_frame_vm_local_words,WordsPerLong); | |
1608 | |
1609 assert(monitor_size == round_to(monitor_size, WordsPerLong), "must align"); | |
1610 // | |
1611 // Note: if you look closely this appears to be doing something much different | |
1612 // than generate_fixed_frame. What is happening is this. On sparc we have to do | |
1613 // this dance with interpreter_sp_adjustment because the window save area would | |
1614 // appear just below the bottom (tos) of the caller's java expression stack. Because | |
1615 // the interpreter want to have the locals completely contiguous generate_fixed_frame | |
1616 // will adjust the caller's sp for the "extra locals" (max_locals - parameter_size). | |
1617 // Now in generate_fixed_frame the extension of the caller's sp happens in the callee. | |
1618 // In this code the opposite occurs the caller adjusts it's own stack base on the callee. | |
1619 // This is mostly ok but it does cause a problem when we get to the initial frame (the oldest) | |
1620 // because the oldest frame would have adjust its callers frame and yet that frame | |
1621 // already exists and isn't part of this array of frames we are unpacking. So at first | |
1622 // glance this would seem to mess up that frame. However Deoptimization::fetch_unroll_info_helper() | |
1623 // will after it calculates all of the frame's on_stack_size()'s will then figure out the | |
1624 // amount to adjust the caller of the initial (oldest) frame and the calculation will all | |
1625 // add up. It does seem like it simpler to account for the adjustment here (and remove the | |
1626 // callee... parameters here). However this would mean that this routine would have to take | |
1627 // the caller frame as input so we could adjust its sp (and set it's interpreter_sp_adjustment) | |
1628 // and run the calling loop in the reverse order. This would also would appear to mean making | |
1629 // this code aware of what the interactions are when that initial caller fram was an osr or | |
1630 // other adapter frame. deoptimization is complicated enough and hard enough to debug that | |
1631 // there is no sense in messing working code. | |
1632 // | |
1633 | |
1634 int rounded_cls = round_to((callee_local_count - callee_param_count), WordsPerLong); | |
1635 assert(rounded_cls == round_to(rounded_cls, WordsPerLong), "must align"); | |
1636 | |
1637 int raw_frame_size = size_activation_helper(rounded_cls, method->max_stack(), | |
1638 monitor_size); | |
1639 | |
1640 if (interpreter_frame != NULL) { | |
1641 // The skeleton frame must already look like an interpreter frame | |
1642 // even if not fully filled out. | |
1643 assert(interpreter_frame->is_interpreted_frame(), "Must be interpreted frame"); | |
1644 | |
1645 intptr_t* fp = interpreter_frame->fp(); | |
1646 | |
1647 JavaThread* thread = JavaThread::current(); | |
1648 RegisterMap map(thread, false); | |
1649 // More verification that skeleton frame is properly walkable | |
1650 assert(fp == caller->sp(), "fp must match"); | |
1651 | |
1652 intptr_t* montop = fp - rounded_vm_local_words; | |
1653 | |
1654 // preallocate monitors (cf. __ add_monitor_to_stack) | |
1655 intptr_t* monitors = montop - monitor_size; | |
1656 | |
1657 // preallocate stack space | |
1658 intptr_t* esp = monitors - 1 - | |
1506 | 1659 (tempcount * Interpreter::stackElementWords) - |
0 | 1660 popframe_extra_args; |
1661 | |
1506 | 1662 int local_words = method->max_locals() * Interpreter::stackElementWords; |
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1663 NEEDS_CLEANUP; |
0 | 1664 intptr_t* locals; |
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1665 if (caller->is_interpreted_frame()) { |
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1666 // Can force the locals area to end up properly overlapping the top of the expression stack. |
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1667 intptr_t* Lesp_ptr = caller->interpreter_frame_tos_address() - 1; |
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1668 // Note that this computation means we replace size_of_parameters() values from the caller |
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1669 // interpreter frame's expression stack with our argument locals |
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1670 int parm_words = caller_actual_parameters * Interpreter::stackElementWords; |
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1671 locals = Lesp_ptr + parm_words; |
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1672 int delta = local_words - parm_words; |
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1673 int computed_sp_adjustment = (delta > 0) ? round_to(delta, WordsPerLong) : 0; |
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1674 *interpreter_frame->register_addr(I5_savedSP) = (intptr_t) (fp + computed_sp_adjustment) - STACK_BIAS; |
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1675 if (!is_bottom_frame) { |
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1676 // Llast_SP is set below for the current frame to SP (with the |
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1677 // extra space for the callee's locals). Here we adjust |
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1678 // Llast_SP for the caller's frame, removing the extra space |
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1679 // for the current method's locals. |
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1680 *caller->register_addr(Llast_SP) = *interpreter_frame->register_addr(I5_savedSP); |
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1681 } else { |
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1682 assert(*caller->register_addr(Llast_SP) >= *interpreter_frame->register_addr(I5_savedSP), "strange Llast_SP"); |
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1683 } |
0 | 1684 } else { |
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1685 assert(caller->is_compiled_frame() || caller->is_entry_frame(), "only possible cases"); |
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1686 // Don't have Lesp available; lay out locals block in the caller |
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1687 // adjacent to the register window save area. |
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1688 // |
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1689 // Compiled frames do not allocate a varargs area which is why this if |
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1690 // statement is needed. |
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1691 // |
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1692 if (caller->is_compiled_frame()) { |
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1693 locals = fp + frame::register_save_words + local_words - 1; |
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1694 } else { |
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1695 locals = fp + frame::memory_parameter_word_sp_offset + local_words - 1; |
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1696 } |
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1697 if (!caller->is_entry_frame()) { |
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1698 // Caller wants his own SP back |
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1699 int caller_frame_size = caller->cb()->frame_size(); |
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1700 *interpreter_frame->register_addr(I5_savedSP) = (intptr_t)(caller->fp() - caller_frame_size) - STACK_BIAS; |
0 | 1701 } |
1702 } | |
1703 if (TraceDeoptimization) { | |
1704 if (caller->is_entry_frame()) { | |
1705 // make sure I5_savedSP and the entry frames notion of saved SP | |
1706 // agree. This assertion duplicate a check in entry frame code | |
1707 // but catches the failure earlier. | |
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1708 /* |
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1709 * Sanzinger: This does not make sense to me, since when we call stub_call -> i2c, the i2c may change the |
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1710 * sp, which then is not in sync with Lscratch anymore. |
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1711 */ |
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1712 /**assert(*caller->register_addr(Lscratch) == *interpreter_frame->register_addr(I5_savedSP), |
0 | 1713 "would change callers SP"); |
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1714 */ |
0 | 1715 } |
1716 if (caller->is_entry_frame()) { | |
1717 tty->print("entry "); | |
1718 } | |
1719 if (caller->is_compiled_frame()) { | |
1720 tty->print("compiled "); | |
1721 if (caller->is_deoptimized_frame()) { | |
1722 tty->print("(deopt) "); | |
1723 } | |
1724 } | |
1725 if (caller->is_interpreted_frame()) { | |
1726 tty->print("interpreted "); | |
1727 } | |
1728 tty->print_cr("caller fp=0x%x sp=0x%x", caller->fp(), caller->sp()); | |
1729 tty->print_cr("save area = 0x%x, 0x%x", caller->sp(), caller->sp() + 16); | |
1730 tty->print_cr("save area = 0x%x, 0x%x", caller->fp(), caller->fp() + 16); | |
1731 tty->print_cr("interpreter fp=0x%x sp=0x%x", interpreter_frame->fp(), interpreter_frame->sp()); | |
1732 tty->print_cr("save area = 0x%x, 0x%x", interpreter_frame->sp(), interpreter_frame->sp() + 16); | |
1733 tty->print_cr("save area = 0x%x, 0x%x", interpreter_frame->fp(), interpreter_frame->fp() + 16); | |
1734 tty->print_cr("Llocals = 0x%x", locals); | |
1735 tty->print_cr("Lesp = 0x%x", esp); | |
1736 tty->print_cr("Lmonitors = 0x%x", monitors); | |
1737 } | |
1738 | |
1739 if (method->max_locals() > 0) { | |
1740 assert(locals < caller->sp() || locals >= (caller->sp() + 16), "locals in save area"); | |
1741 assert(locals < caller->fp() || locals > (caller->fp() + 16), "locals in save area"); | |
1742 assert(locals < interpreter_frame->sp() || locals > (interpreter_frame->sp() + 16), "locals in save area"); | |
1743 assert(locals < interpreter_frame->fp() || locals >= (interpreter_frame->fp() + 16), "locals in save area"); | |
1744 } | |
1745 #ifdef _LP64 | |
1746 assert(*interpreter_frame->register_addr(I5_savedSP) & 1, "must be odd"); | |
1747 #endif | |
1748 | |
1749 *interpreter_frame->register_addr(Lmethod) = (intptr_t) method; | |
1750 *interpreter_frame->register_addr(Llocals) = (intptr_t) locals; | |
1751 *interpreter_frame->register_addr(Lmonitors) = (intptr_t) monitors; | |
1752 *interpreter_frame->register_addr(Lesp) = (intptr_t) esp; | |
1753 // Llast_SP will be same as SP as there is no adapter space | |
1754 *interpreter_frame->register_addr(Llast_SP) = (intptr_t) interpreter_frame->sp() - STACK_BIAS; | |
1755 *interpreter_frame->register_addr(LcpoolCache) = (intptr_t) method->constants()->cache(); | |
1756 #ifdef FAST_DISPATCH | |
1757 *interpreter_frame->register_addr(IdispatchTables) = (intptr_t) Interpreter::dispatch_table(); | |
1758 #endif | |
1759 | |
1760 | |
1761 #ifdef ASSERT | |
1762 BasicObjectLock* mp = (BasicObjectLock*)monitors; | |
1763 | |
1764 assert(interpreter_frame->interpreter_frame_method() == method, "method matches"); | |
1506 | 1765 assert(interpreter_frame->interpreter_frame_local_at(9) == (intptr_t *)((intptr_t)locals - (9 * Interpreter::stackElementSize)), "locals match"); |
0 | 1766 assert(interpreter_frame->interpreter_frame_monitor_end() == mp, "monitor_end matches"); |
1767 assert(((intptr_t *)interpreter_frame->interpreter_frame_monitor_begin()) == ((intptr_t *)mp)+monitor_size, "monitor_begin matches"); | |
1768 assert(interpreter_frame->interpreter_frame_tos_address()-1 == esp, "esp matches"); | |
1769 | |
1770 // check bounds | |
1771 intptr_t* lo = interpreter_frame->sp() + (frame::memory_parameter_word_sp_offset - 1); | |
1772 intptr_t* hi = interpreter_frame->fp() - rounded_vm_local_words; | |
1773 assert(lo < monitors && montop <= hi, "monitors in bounds"); | |
1774 assert(lo <= esp && esp < monitors, "esp in bounds"); | |
1775 #endif // ASSERT | |
1776 } | |
1777 | |
1778 return raw_frame_size; | |
1779 } | |
1780 | |
1781 //---------------------------------------------------------------------------------------------------- | |
1782 // Exceptions | |
1783 void TemplateInterpreterGenerator::generate_throw_exception() { | |
1784 | |
1785 // Entry point in previous activation (i.e., if the caller was interpreted) | |
1786 Interpreter::_rethrow_exception_entry = __ pc(); | |
1787 // O0: exception | |
1788 | |
1789 // entry point for exceptions thrown within interpreter code | |
1790 Interpreter::_throw_exception_entry = __ pc(); | |
1791 __ verify_thread(); | |
1792 // expression stack is undefined here | |
1793 // O0: exception, i.e. Oexception | |
1794 // Lbcp: exception bcx | |
1795 __ verify_oop(Oexception); | |
1796 | |
1797 | |
1798 // expression stack must be empty before entering the VM in case of an exception | |
1799 __ empty_expression_stack(); | |
1800 // find exception handler address and preserve exception oop | |
1801 // call C routine to find handler and jump to it | |
1802 __ call_VM(O1, CAST_FROM_FN_PTR(address, InterpreterRuntime::exception_handler_for_exception), Oexception); | |
1803 __ push_ptr(O1); // push exception for exception handler bytecodes | |
1804 | |
1805 __ JMP(O0, 0); // jump to exception handler (may be remove activation entry!) | |
1806 __ delayed()->nop(); | |
1807 | |
1808 | |
1809 // if the exception is not handled in the current frame | |
1810 // the frame is removed and the exception is rethrown | |
1811 // (i.e. exception continuation is _rethrow_exception) | |
1812 // | |
1813 // Note: At this point the bci is still the bxi for the instruction which caused | |
1814 // the exception and the expression stack is empty. Thus, for any VM calls | |
1815 // at this point, GC will find a legal oop map (with empty expression stack). | |
1816 | |
1817 // in current activation | |
1818 // tos: exception | |
1819 // Lbcp: exception bcp | |
1820 | |
1821 // | |
1822 // JVMTI PopFrame support | |
1823 // | |
1824 | |
1825 Interpreter::_remove_activation_preserving_args_entry = __ pc(); | |
727 | 1826 Address popframe_condition_addr(G2_thread, JavaThread::popframe_condition_offset()); |
0 | 1827 // Set the popframe_processing bit in popframe_condition indicating that we are |
1828 // currently handling popframe, so that call_VMs that may happen later do not trigger new | |
1829 // popframe handling cycles. | |
1830 | |
1831 __ ld(popframe_condition_addr, G3_scratch); | |
1832 __ or3(G3_scratch, JavaThread::popframe_processing_bit, G3_scratch); | |
1833 __ stw(G3_scratch, popframe_condition_addr); | |
1834 | |
1835 // Empty the expression stack, as in normal exception handling | |
1836 __ empty_expression_stack(); | |
1837 __ unlock_if_synchronized_method(vtos, /* throw_monitor_exception */ false, /* install_monitor_exception */ false); | |
1838 | |
1839 { | |
1840 // Check to see whether we are returning to a deoptimized frame. | |
1841 // (The PopFrame call ensures that the caller of the popped frame is | |
1842 // either interpreted or compiled and deoptimizes it if compiled.) | |
1843 // In this case, we can't call dispatch_next() after the frame is | |
1844 // popped, but instead must save the incoming arguments and restore | |
1845 // them after deoptimization has occurred. | |
1846 // | |
1847 // Note that we don't compare the return PC against the | |
1848 // deoptimization blob's unpack entry because of the presence of | |
1849 // adapter frames in C2. | |
1850 Label caller_not_deoptimized; | |
1851 __ call_VM_leaf(L7_thread_cache, CAST_FROM_FN_PTR(address, InterpreterRuntime::interpreter_contains), I7); | |
3839 | 1852 __ br_notnull_short(O0, Assembler::pt, caller_not_deoptimized); |
0 | 1853 |
1854 const Register Gtmp1 = G3_scratch; | |
1855 const Register Gtmp2 = G1_scratch; | |
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1856 const Register RconstMethod = Gtmp1; |
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1857 const Address constMethod(Lmethod, Method::const_offset()); |
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1858 const Address size_of_parameters(RconstMethod, ConstMethod::size_of_parameters_offset()); |
0 | 1859 |
1860 // Compute size of arguments for saving when returning to deoptimized caller | |
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1861 __ ld_ptr(constMethod, RconstMethod); |
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1862 __ lduh(size_of_parameters, Gtmp1); |
1506 | 1863 __ sll(Gtmp1, Interpreter::logStackElementSize, Gtmp1); |
0 | 1864 __ sub(Llocals, Gtmp1, Gtmp2); |
1865 __ add(Gtmp2, wordSize, Gtmp2); | |
1866 // Save these arguments | |
1867 __ call_VM_leaf(L7_thread_cache, CAST_FROM_FN_PTR(address, Deoptimization::popframe_preserve_args), G2_thread, Gtmp1, Gtmp2); | |
1868 // Inform deoptimization that it is responsible for restoring these arguments | |
1869 __ set(JavaThread::popframe_force_deopt_reexecution_bit, Gtmp1); | |
727 | 1870 Address popframe_condition_addr(G2_thread, JavaThread::popframe_condition_offset()); |
0 | 1871 __ st(Gtmp1, popframe_condition_addr); |
1872 | |
1873 // Return from the current method | |
1874 // The caller's SP was adjusted upon method entry to accomodate | |
1875 // the callee's non-argument locals. Undo that adjustment. | |
1876 __ ret(); | |
1877 __ delayed()->restore(I5_savedSP, G0, SP); | |
1878 | |
1879 __ bind(caller_not_deoptimized); | |
1880 } | |
1881 | |
1882 // Clear the popframe condition flag | |
1883 __ stw(G0 /* popframe_inactive */, popframe_condition_addr); | |
1884 | |
1885 // Get out of the current method (how this is done depends on the particular compiler calling | |
1886 // convention that the interpreter currently follows) | |
1887 // The caller's SP was adjusted upon method entry to accomodate | |
1888 // the callee's non-argument locals. Undo that adjustment. | |
1889 __ restore(I5_savedSP, G0, SP); | |
1890 // The method data pointer was incremented already during | |
1891 // call profiling. We have to restore the mdp for the current bcp. | |
1892 if (ProfileInterpreter) { | |
1893 __ set_method_data_pointer_for_bcp(); | |
1894 } | |
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1895 |
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1896 #if INCLUDE_JVMTI |
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1897 if (EnableInvokeDynamic) { |
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1898 Label L_done; |
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1899 |
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1900 __ ldub(Address(Lbcp, 0), G1_scratch); // Load current bytecode |
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1901 __ cmp_and_br_short(G1_scratch, Bytecodes::_invokestatic, Assembler::notEqual, Assembler::pn, L_done); |
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1902 |
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1903 // The member name argument must be restored if _invokestatic is re-executed after a PopFrame call. |
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1904 // Detect such a case in the InterpreterRuntime function and return the member name argument, or NULL. |
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1905 |
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1906 __ call_VM(G1_scratch, CAST_FROM_FN_PTR(address, InterpreterRuntime::member_name_arg_or_null), I0, Lmethod, Lbcp); |
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1907 |
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1908 __ br_null(G1_scratch, false, Assembler::pn, L_done); |
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1909 __ delayed()->nop(); |
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1910 |
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1911 __ st_ptr(G1_scratch, Lesp, wordSize); |
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1912 __ bind(L_done); |
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1913 } |
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1914 #endif // INCLUDE_JVMTI |
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1915 |
0 | 1916 // Resume bytecode interpretation at the current bcp |
1917 __ dispatch_next(vtos); | |
1918 // end of JVMTI PopFrame support | |
1919 | |
1920 Interpreter::_remove_activation_entry = __ pc(); | |
1921 | |
1922 // preserve exception over this code sequence (remove activation calls the vm, but oopmaps are not correct here) | |
1923 __ pop_ptr(Oexception); // get exception | |
1924 | |
1925 // Intel has the following comment: | |
1926 //// remove the activation (without doing throws on illegalMonitorExceptions) | |
1927 // They remove the activation without checking for bad monitor state. | |
1928 // %%% We should make sure this is the right semantics before implementing. | |
1929 | |
1930 __ set_vm_result(Oexception); | |
1931 __ unlock_if_synchronized_method(vtos, /* throw_monitor_exception */ false); | |
1932 | |
1933 __ notify_method_exit(false, vtos, InterpreterMacroAssembler::SkipNotifyJVMTI); | |
1934 | |
1935 __ get_vm_result(Oexception); | |
1936 __ verify_oop(Oexception); | |
1937 | |
1938 const int return_reg_adjustment = frame::pc_return_offset; | |
727 | 1939 Address issuing_pc_addr(I7, return_reg_adjustment); |
0 | 1940 |
1941 // We are done with this activation frame; find out where to go next. | |
1942 // The continuation point will be an exception handler, which expects | |
1943 // the following registers set up: | |
1944 // | |
1945 // Oexception: exception | |
1946 // Oissuing_pc: the local call that threw exception | |
1947 // Other On: garbage | |
1948 // In/Ln: the contents of the caller's register window | |
1949 // | |
1950 // We do the required restore at the last possible moment, because we | |
1951 // need to preserve some state across a runtime call. | |
1952 // (Remember that the caller activation is unknown--it might not be | |
1953 // interpreted, so things like Lscratch are useless in the caller.) | |
1954 | |
1955 // Although the Intel version uses call_C, we can use the more | |
1956 // compact call_VM. (The only real difference on SPARC is a | |
1957 // harmlessly ignored [re]set_last_Java_frame, compared with | |
1958 // the Intel code which lacks this.) | |
1959 __ mov(Oexception, Oexception ->after_save()); // get exception in I0 so it will be on O0 after restore | |
1960 __ add(issuing_pc_addr, Oissuing_pc->after_save()); // likewise set I1 to a value local to the caller | |
1961 __ super_call_VM_leaf(L7_thread_cache, | |
1962 CAST_FROM_FN_PTR(address, SharedRuntime::exception_handler_for_return_address), | |
1295 | 1963 G2_thread, Oissuing_pc->after_save()); |
0 | 1964 |
1965 // The caller's SP was adjusted upon method entry to accomodate | |
1966 // the callee's non-argument locals. Undo that adjustment. | |
1967 __ JMP(O0, 0); // return exception handler in caller | |
1968 __ delayed()->restore(I5_savedSP, G0, SP); | |
1969 | |
1970 // (same old exception object is already in Oexception; see above) | |
1971 // Note that an "issuing PC" is actually the next PC after the call | |
1972 } | |
1973 | |
1974 | |
1975 // | |
1976 // JVMTI ForceEarlyReturn support | |
1977 // | |
1978 | |
1979 address TemplateInterpreterGenerator::generate_earlyret_entry_for(TosState state) { | |
1980 address entry = __ pc(); | |
1981 | |
1982 __ empty_expression_stack(); | |
1983 __ load_earlyret_value(state); | |
1984 | |
727 | 1985 __ ld_ptr(G2_thread, JavaThread::jvmti_thread_state_offset(), G3_scratch); |
1986 Address cond_addr(G3_scratch, JvmtiThreadState::earlyret_state_offset()); | |
0 | 1987 |
1988 // Clear the earlyret state | |
1989 __ stw(G0 /* JvmtiThreadState::earlyret_inactive */, cond_addr); | |
1990 | |
1991 __ remove_activation(state, | |
1992 /* throw_monitor_exception */ false, | |
1993 /* install_monitor_exception */ false); | |
1994 | |
1995 // The caller's SP was adjusted upon method entry to accomodate | |
1996 // the callee's non-argument locals. Undo that adjustment. | |
1997 __ ret(); // return to caller | |
1998 __ delayed()->restore(I5_savedSP, G0, SP); | |
1999 | |
2000 return entry; | |
2001 } // end of JVMTI ForceEarlyReturn support | |
2002 | |
2003 | |
2004 //------------------------------------------------------------------------------------------------------------------------ | |
2005 // Helper for vtos entry point generation | |
2006 | |
2007 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) { | |
2008 assert(t->is_valid() && t->tos_in() == vtos, "illegal template"); | |
2009 Label L; | |
3839 | 2010 aep = __ pc(); __ push_ptr(); __ ba_short(L); |
2011 fep = __ pc(); __ push_f(); __ ba_short(L); | |
2012 dep = __ pc(); __ push_d(); __ ba_short(L); | |
2013 lep = __ pc(); __ push_l(); __ ba_short(L); | |
0 | 2014 iep = __ pc(); __ push_i(); |
2015 bep = cep = sep = iep; // there aren't any | |
2016 vep = __ pc(); __ bind(L); // fall through | |
2017 generate_and_dispatch(t); | |
2018 } | |
2019 | |
2020 // -------------------------------------------------------------------------------- | |
2021 | |
2022 | |
2023 InterpreterGenerator::InterpreterGenerator(StubQueue* code) | |
2024 : TemplateInterpreterGenerator(code) { | |
2025 generate_all(); // down here so it can be "virtual" | |
2026 } | |
2027 | |
2028 // -------------------------------------------------------------------------------- | |
2029 | |
2030 // Non-product code | |
2031 #ifndef PRODUCT | |
2032 address TemplateInterpreterGenerator::generate_trace_code(TosState state) { | |
2033 address entry = __ pc(); | |
2034 | |
2035 __ push(state); | |
2036 __ mov(O7, Lscratch); // protect return address within interpreter | |
2037 | |
2038 // Pass a 0 (not used in sparc) and the top of stack to the bytecode tracer | |
2039 __ mov( Otos_l2, G3_scratch ); | |
2040 __ call_VM(noreg, CAST_FROM_FN_PTR(address, SharedRuntime::trace_bytecode), G0, Otos_l1, G3_scratch); | |
2041 __ mov(Lscratch, O7); // restore return address | |
2042 __ pop(state); | |
2043 __ retl(); | |
2044 __ delayed()->nop(); | |
2045 | |
2046 return entry; | |
2047 } | |
2048 | |
2049 | |
2050 // helpers for generate_and_dispatch | |
2051 | |
2052 void TemplateInterpreterGenerator::count_bytecode() { | |
727 | 2053 __ inc_counter(&BytecodeCounter::_counter_value, G3_scratch, G4_scratch); |
0 | 2054 } |
2055 | |
2056 | |
2057 void TemplateInterpreterGenerator::histogram_bytecode(Template* t) { | |
727 | 2058 __ inc_counter(&BytecodeHistogram::_counters[t->bytecode()], G3_scratch, G4_scratch); |
0 | 2059 } |
2060 | |
2061 | |
2062 void TemplateInterpreterGenerator::histogram_bytecode_pair(Template* t) { | |
727 | 2063 AddressLiteral index (&BytecodePairHistogram::_index); |
2064 AddressLiteral counters((address) &BytecodePairHistogram::_counters); | |
0 | 2065 |
2066 // get index, shift out old bytecode, bring in new bytecode, and store it | |
2067 // _index = (_index >> log2_number_of_codes) | | |
2068 // (bytecode << log2_number_of_codes); | |
2069 | |
727 | 2070 __ load_contents(index, G4_scratch); |
0 | 2071 __ srl( G4_scratch, BytecodePairHistogram::log2_number_of_codes, G4_scratch ); |
2072 __ set( ((int)t->bytecode()) << BytecodePairHistogram::log2_number_of_codes, G3_scratch ); | |
2073 __ or3( G3_scratch, G4_scratch, G4_scratch ); | |
727 | 2074 __ store_contents(G4_scratch, index, G3_scratch); |
0 | 2075 |
2076 // bump bucket contents | |
2077 // _counters[_index] ++; | |
2078 | |
727 | 2079 __ set(counters, G3_scratch); // loads into G3_scratch |
0 | 2080 __ sll( G4_scratch, LogBytesPerWord, G4_scratch ); // Index is word address |
2081 __ add (G3_scratch, G4_scratch, G3_scratch); // Add in index | |
2082 __ ld (G3_scratch, 0, G4_scratch); | |
2083 __ inc (G4_scratch); | |
2084 __ st (G4_scratch, 0, G3_scratch); | |
2085 } | |
2086 | |
2087 | |
2088 void TemplateInterpreterGenerator::trace_bytecode(Template* t) { | |
2089 // Call a little run-time stub to avoid blow-up for each bytecode. | |
2090 // The run-time runtime saves the right registers, depending on | |
2091 // the tosca in-state for the given template. | |
2092 address entry = Interpreter::trace_code(t->tos_in()); | |
2093 guarantee(entry != NULL, "entry must have been generated"); | |
2094 __ call(entry, relocInfo::none); | |
2095 __ delayed()->nop(); | |
2096 } | |
2097 | |
2098 | |
2099 void TemplateInterpreterGenerator::stop_interpreter_at() { | |
727 | 2100 AddressLiteral counter(&BytecodeCounter::_counter_value); |
2101 __ load_contents(counter, G3_scratch); | |
2102 AddressLiteral stop_at(&StopInterpreterAt); | |
0 | 2103 __ load_ptr_contents(stop_at, G4_scratch); |
2104 __ cmp(G3_scratch, G4_scratch); | |
5923 | 2105 __ breakpoint_trap(Assembler::equal, Assembler::icc); |
0 | 2106 } |
2107 #endif // not PRODUCT | |
2108 #endif // !CC_INTERP |