Mercurial > hg > truffle
annotate src/cpu/sparc/vm/c1_Runtime1_sparc.cpp @ 17610:908afcc9d1cb
8029091: Bug in calculation of code cache sweeping interval
Summary: Use signed data type so that no underflow can happen
Reviewed-by: kvn, roland
author | anoll |
---|---|
date | Tue, 17 Dec 2013 08:31:06 +0100 |
parents | 55fb97c4c58d |
children | 4ca6dc0799b6 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1999, 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" |
26 #include "c1/c1_Defs.hpp" | |
27 #include "c1/c1_MacroAssembler.hpp" | |
28 #include "c1/c1_Runtime1.hpp" | |
29 #include "interpreter/interpreter.hpp" | |
30 #include "nativeInst_sparc.hpp" | |
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31 #include "oops/compiledICHolder.hpp" |
1972 | 32 #include "oops/oop.inline.hpp" |
33 #include "prims/jvmtiExport.hpp" | |
34 #include "register_sparc.hpp" | |
35 #include "runtime/sharedRuntime.hpp" | |
36 #include "runtime/signature.hpp" | |
37 #include "runtime/vframeArray.hpp" | |
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38 #include "utilities/macros.hpp" |
1972 | 39 #include "vmreg_sparc.inline.hpp" |
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40 #if INCLUDE_ALL_GCS |
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41 #include "gc_implementation/g1/g1SATBCardTableModRefBS.hpp" |
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42 #endif |
0 | 43 |
44 // Implementation of StubAssembler | |
45 | |
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46 int StubAssembler::call_RT(Register oop_result1, Register metadata_result, address entry_point, int number_of_arguments) { |
0 | 47 // for sparc changing the number of arguments doesn't change |
48 // anything about the frame size so we'll always lie and claim that | |
49 // we are only passing 1 argument. | |
50 set_num_rt_args(1); | |
51 | |
52 assert_not_delayed(); | |
53 // bang stack before going to runtime | |
54 set(-os::vm_page_size() + STACK_BIAS, G3_scratch); | |
55 st(G0, SP, G3_scratch); | |
56 | |
57 // debugging support | |
58 assert(number_of_arguments >= 0 , "cannot have negative number of arguments"); | |
59 | |
60 set_last_Java_frame(SP, noreg); | |
61 if (VerifyThread) mov(G2_thread, O0); // about to be smashed; pass early | |
62 save_thread(L7_thread_cache); | |
63 // do the call | |
64 call(entry_point, relocInfo::runtime_call_type); | |
65 if (!VerifyThread) { | |
66 delayed()->mov(G2_thread, O0); // pass thread as first argument | |
67 } else { | |
68 delayed()->nop(); // (thread already passed) | |
69 } | |
70 int call_offset = offset(); // offset of return address | |
71 restore_thread(L7_thread_cache); | |
72 reset_last_Java_frame(); | |
73 | |
74 // check for pending exceptions | |
75 { Label L; | |
727 | 76 Address exception_addr(G2_thread, Thread::pending_exception_offset()); |
0 | 77 ld_ptr(exception_addr, Gtemp); |
3839 | 78 br_null_short(Gtemp, pt, L); |
727 | 79 Address vm_result_addr(G2_thread, JavaThread::vm_result_offset()); |
0 | 80 st_ptr(G0, vm_result_addr); |
727 | 81 Address vm_result_addr_2(G2_thread, JavaThread::vm_result_2_offset()); |
0 | 82 st_ptr(G0, vm_result_addr_2); |
83 | |
84 if (frame_size() == no_frame_size) { | |
85 // we use O7 linkage so that forward_exception_entry has the issuing PC | |
86 call(StubRoutines::forward_exception_entry(), relocInfo::runtime_call_type); | |
87 delayed()->restore(); | |
88 } else if (_stub_id == Runtime1::forward_exception_id) { | |
89 should_not_reach_here(); | |
90 } else { | |
727 | 91 AddressLiteral exc(Runtime1::entry_for(Runtime1::forward_exception_id)); |
92 jump_to(exc, G4); | |
0 | 93 delayed()->nop(); |
94 } | |
95 bind(L); | |
96 } | |
97 | |
98 // get oop result if there is one and reset the value in the thread | |
99 if (oop_result1->is_valid()) { // get oop result if there is one and reset it in the thread | |
100 get_vm_result (oop_result1); | |
101 } else { | |
102 // be a little paranoid and clear the result | |
727 | 103 Address vm_result_addr(G2_thread, JavaThread::vm_result_offset()); |
0 | 104 st_ptr(G0, vm_result_addr); |
105 } | |
106 | |
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107 // get second result if there is one and reset the value in the thread |
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108 if (metadata_result->is_valid()) { |
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109 get_vm_result_2 (metadata_result); |
0 | 110 } else { |
111 // be a little paranoid and clear the result | |
727 | 112 Address vm_result_addr_2(G2_thread, JavaThread::vm_result_2_offset()); |
0 | 113 st_ptr(G0, vm_result_addr_2); |
114 } | |
115 | |
116 return call_offset; | |
117 } | |
118 | |
119 | |
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120 int StubAssembler::call_RT(Register oop_result1, Register metadata_result, address entry, Register arg1) { |
0 | 121 // O0 is reserved for the thread |
122 mov(arg1, O1); | |
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123 return call_RT(oop_result1, metadata_result, entry, 1); |
0 | 124 } |
125 | |
126 | |
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127 int StubAssembler::call_RT(Register oop_result1, Register metadata_result, address entry, Register arg1, Register arg2) { |
0 | 128 // O0 is reserved for the thread |
129 mov(arg1, O1); | |
130 mov(arg2, O2); assert(arg2 != O1, "smashed argument"); | |
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131 return call_RT(oop_result1, metadata_result, entry, 2); |
0 | 132 } |
133 | |
134 | |
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135 int StubAssembler::call_RT(Register oop_result1, Register metadata_result, address entry, Register arg1, Register arg2, Register arg3) { |
0 | 136 // O0 is reserved for the thread |
137 mov(arg1, O1); | |
138 mov(arg2, O2); assert(arg2 != O1, "smashed argument"); | |
139 mov(arg3, O3); assert(arg3 != O1 && arg3 != O2, "smashed argument"); | |
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140 return call_RT(oop_result1, metadata_result, entry, 3); |
0 | 141 } |
142 | |
143 | |
144 // Implementation of Runtime1 | |
145 | |
146 #define __ sasm-> | |
147 | |
148 static int cpu_reg_save_offsets[FrameMap::nof_cpu_regs]; | |
149 static int fpu_reg_save_offsets[FrameMap::nof_fpu_regs]; | |
150 static int reg_save_size_in_words; | |
151 static int frame_size_in_bytes = -1; | |
152 | |
153 static OopMap* generate_oop_map(StubAssembler* sasm, bool save_fpu_registers) { | |
154 assert(frame_size_in_bytes == __ total_frame_size_in_bytes(reg_save_size_in_words), | |
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155 "mismatch in calculation"); |
0 | 156 sasm->set_frame_size(frame_size_in_bytes / BytesPerWord); |
157 int frame_size_in_slots = frame_size_in_bytes / sizeof(jint); | |
158 OopMap* oop_map = new OopMap(frame_size_in_slots, 0); | |
159 | |
160 int i; | |
161 for (i = 0; i < FrameMap::nof_cpu_regs; i++) { | |
162 Register r = as_Register(i); | |
163 if (r == G1 || r == G3 || r == G4 || r == G5) { | |
164 int sp_offset = cpu_reg_save_offsets[i]; | |
165 oop_map->set_callee_saved(VMRegImpl::stack2reg(sp_offset), | |
166 r->as_VMReg()); | |
167 } | |
168 } | |
169 | |
170 if (save_fpu_registers) { | |
171 for (i = 0; i < FrameMap::nof_fpu_regs; i++) { | |
172 FloatRegister r = as_FloatRegister(i); | |
173 int sp_offset = fpu_reg_save_offsets[i]; | |
174 oop_map->set_callee_saved(VMRegImpl::stack2reg(sp_offset), | |
175 r->as_VMReg()); | |
176 } | |
177 } | |
178 return oop_map; | |
179 } | |
180 | |
181 static OopMap* save_live_registers(StubAssembler* sasm, bool save_fpu_registers = true) { | |
182 assert(frame_size_in_bytes == __ total_frame_size_in_bytes(reg_save_size_in_words), | |
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183 "mismatch in calculation"); |
0 | 184 __ save_frame_c1(frame_size_in_bytes); |
185 | |
186 // Record volatile registers as callee-save values in an OopMap so their save locations will be | |
187 // propagated to the caller frame's RegisterMap during StackFrameStream construction (needed for | |
188 // deoptimization; see compiledVFrame::create_stack_value). The caller's I, L and O registers | |
189 // are saved in register windows - I's and L's in the caller's frame and O's in the stub frame | |
190 // (as the stub's I's) when the runtime routine called by the stub creates its frame. | |
191 // OopMap frame sizes are in c2 stack slot sizes (sizeof(jint)) | |
192 | |
193 int i; | |
194 for (i = 0; i < FrameMap::nof_cpu_regs; i++) { | |
195 Register r = as_Register(i); | |
196 if (r == G1 || r == G3 || r == G4 || r == G5) { | |
197 int sp_offset = cpu_reg_save_offsets[i]; | |
198 __ st_ptr(r, SP, (sp_offset * BytesPerWord) + STACK_BIAS); | |
199 } | |
200 } | |
201 | |
202 if (save_fpu_registers) { | |
203 for (i = 0; i < FrameMap::nof_fpu_regs; i++) { | |
204 FloatRegister r = as_FloatRegister(i); | |
205 int sp_offset = fpu_reg_save_offsets[i]; | |
206 __ stf(FloatRegisterImpl::S, r, SP, (sp_offset * BytesPerWord) + STACK_BIAS); | |
207 } | |
208 } | |
209 | |
210 return generate_oop_map(sasm, save_fpu_registers); | |
211 } | |
212 | |
213 static void restore_live_registers(StubAssembler* sasm, bool restore_fpu_registers = true) { | |
214 for (int i = 0; i < FrameMap::nof_cpu_regs; i++) { | |
215 Register r = as_Register(i); | |
216 if (r == G1 || r == G3 || r == G4 || r == G5) { | |
217 __ ld_ptr(SP, (cpu_reg_save_offsets[i] * BytesPerWord) + STACK_BIAS, r); | |
218 } | |
219 } | |
220 | |
221 if (restore_fpu_registers) { | |
222 for (int i = 0; i < FrameMap::nof_fpu_regs; i++) { | |
223 FloatRegister r = as_FloatRegister(i); | |
224 __ ldf(FloatRegisterImpl::S, SP, (fpu_reg_save_offsets[i] * BytesPerWord) + STACK_BIAS, r); | |
225 } | |
226 } | |
227 } | |
228 | |
229 | |
230 void Runtime1::initialize_pd() { | |
231 // compute word offsets from SP at which live (non-windowed) registers are captured by stub routines | |
232 // | |
233 // A stub routine will have a frame that is at least large enough to hold | |
234 // a register window save area (obviously) and the volatile g registers | |
235 // and floating registers. A user of save_live_registers can have a frame | |
236 // that has more scratch area in it (although typically they will use L-regs). | |
237 // in that case the frame will look like this (stack growing down) | |
238 // | |
239 // FP -> | | | |
240 // | scratch mem | | |
241 // | " " | | |
242 // -------------- | |
243 // | float regs | | |
244 // | " " | | |
245 // --------------- | |
246 // | G regs | | |
247 // | " " | | |
248 // --------------- | |
249 // | abi reg. | | |
250 // | window save | | |
251 // | area | | |
252 // SP -> --------------- | |
253 // | |
254 int i; | |
255 int sp_offset = round_to(frame::register_save_words, 2); // start doubleword aligned | |
256 | |
257 // only G int registers are saved explicitly; others are found in register windows | |
258 for (i = 0; i < FrameMap::nof_cpu_regs; i++) { | |
259 Register r = as_Register(i); | |
260 if (r == G1 || r == G3 || r == G4 || r == G5) { | |
261 cpu_reg_save_offsets[i] = sp_offset; | |
262 sp_offset++; | |
263 } | |
264 } | |
265 | |
266 // all float registers are saved explicitly | |
267 assert(FrameMap::nof_fpu_regs == 32, "double registers not handled here"); | |
268 for (i = 0; i < FrameMap::nof_fpu_regs; i++) { | |
269 fpu_reg_save_offsets[i] = sp_offset; | |
270 sp_offset++; | |
271 } | |
272 reg_save_size_in_words = sp_offset - frame::memory_parameter_word_sp_offset; | |
273 // this should match assembler::total_frame_size_in_bytes, which | |
274 // isn't callable from this context. It's checked by an assert when | |
275 // it's used though. | |
276 frame_size_in_bytes = align_size_up(sp_offset * wordSize, 8); | |
277 } | |
278 | |
279 | |
280 OopMapSet* Runtime1::generate_exception_throw(StubAssembler* sasm, address target, bool has_argument) { | |
281 // make a frame and preserve the caller's caller-save registers | |
282 OopMap* oop_map = save_live_registers(sasm); | |
283 int call_offset; | |
284 if (!has_argument) { | |
285 call_offset = __ call_RT(noreg, noreg, target); | |
286 } else { | |
287 call_offset = __ call_RT(noreg, noreg, target, G4); | |
288 } | |
289 OopMapSet* oop_maps = new OopMapSet(); | |
290 oop_maps->add_gc_map(call_offset, oop_map); | |
291 | |
292 __ should_not_reach_here(); | |
293 return oop_maps; | |
294 } | |
295 | |
296 | |
297 OopMapSet* Runtime1::generate_stub_call(StubAssembler* sasm, Register result, address target, | |
298 Register arg1, Register arg2, Register arg3) { | |
299 // make a frame and preserve the caller's caller-save registers | |
300 OopMap* oop_map = save_live_registers(sasm); | |
301 | |
302 int call_offset; | |
303 if (arg1 == noreg) { | |
304 call_offset = __ call_RT(result, noreg, target); | |
305 } else if (arg2 == noreg) { | |
306 call_offset = __ call_RT(result, noreg, target, arg1); | |
307 } else if (arg3 == noreg) { | |
308 call_offset = __ call_RT(result, noreg, target, arg1, arg2); | |
309 } else { | |
310 call_offset = __ call_RT(result, noreg, target, arg1, arg2, arg3); | |
311 } | |
312 OopMapSet* oop_maps = NULL; | |
313 | |
314 oop_maps = new OopMapSet(); | |
315 oop_maps->add_gc_map(call_offset, oop_map); | |
316 restore_live_registers(sasm); | |
317 | |
318 __ ret(); | |
319 __ delayed()->restore(); | |
320 | |
321 return oop_maps; | |
322 } | |
323 | |
324 | |
325 OopMapSet* Runtime1::generate_patching(StubAssembler* sasm, address target) { | |
326 // make a frame and preserve the caller's caller-save registers | |
327 OopMap* oop_map = save_live_registers(sasm); | |
328 | |
329 // call the runtime patching routine, returns non-zero if nmethod got deopted. | |
330 int call_offset = __ call_RT(noreg, noreg, target); | |
331 OopMapSet* oop_maps = new OopMapSet(); | |
332 oop_maps->add_gc_map(call_offset, oop_map); | |
333 | |
334 // re-execute the patched instruction or, if the nmethod was deoptmized, return to the | |
335 // deoptimization handler entry that will cause re-execution of the current bytecode | |
336 DeoptimizationBlob* deopt_blob = SharedRuntime::deopt_blob(); | |
337 assert(deopt_blob != NULL, "deoptimization blob must have been created"); | |
338 | |
339 Label no_deopt; | |
3839 | 340 __ br_null_short(O0, Assembler::pt, no_deopt); |
0 | 341 |
342 // return to the deoptimization handler entry for unpacking and rexecute | |
343 // if we simply returned the we'd deopt as if any call we patched had just | |
344 // returned. | |
345 | |
346 restore_live_registers(sasm); | |
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347 |
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348 AddressLiteral dest(deopt_blob->unpack_with_reexecution()); |
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349 __ jump_to(dest, O0); |
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350 __ delayed()->restore(); |
0 | 351 |
352 __ bind(no_deopt); | |
353 restore_live_registers(sasm); | |
354 __ ret(); | |
355 __ delayed()->restore(); | |
356 | |
357 return oop_maps; | |
358 } | |
359 | |
360 OopMapSet* Runtime1::generate_code_for(StubID id, StubAssembler* sasm) { | |
361 | |
362 OopMapSet* oop_maps = NULL; | |
363 // for better readability | |
364 const bool must_gc_arguments = true; | |
365 const bool dont_gc_arguments = false; | |
366 | |
367 // stub code & info for the different stubs | |
368 switch (id) { | |
369 case forward_exception_id: | |
370 { | |
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371 oop_maps = generate_handle_exception(id, sasm); |
0 | 372 } |
373 break; | |
374 | |
375 case new_instance_id: | |
376 case fast_new_instance_id: | |
377 case fast_new_instance_init_check_id: | |
378 { | |
379 Register G5_klass = G5; // Incoming | |
380 Register O0_obj = O0; // Outgoing | |
381 | |
382 if (id == new_instance_id) { | |
383 __ set_info("new_instance", dont_gc_arguments); | |
384 } else if (id == fast_new_instance_id) { | |
385 __ set_info("fast new_instance", dont_gc_arguments); | |
386 } else { | |
387 assert(id == fast_new_instance_init_check_id, "bad StubID"); | |
388 __ set_info("fast new_instance init check", dont_gc_arguments); | |
389 } | |
390 | |
391 if ((id == fast_new_instance_id || id == fast_new_instance_init_check_id) && | |
392 UseTLAB && FastTLABRefill) { | |
393 Label slow_path; | |
394 Register G1_obj_size = G1; | |
395 Register G3_t1 = G3; | |
396 Register G4_t2 = G4; | |
397 assert_different_registers(G5_klass, G1_obj_size, G3_t1, G4_t2); | |
398 | |
399 // Push a frame since we may do dtrace notification for the | |
400 // allocation which requires calling out and we don't want | |
401 // to stomp the real return address. | |
402 __ save_frame(0); | |
403 | |
404 if (id == fast_new_instance_init_check_id) { | |
405 // make sure the klass is initialized | |
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406 __ ldub(G5_klass, in_bytes(InstanceKlass::init_state_offset()), G3_t1); |
12955 | 407 __ cmp(G3_t1, InstanceKlass::fully_initialized); |
408 __ br(Assembler::notEqual, false, Assembler::pn, slow_path); | |
409 __ delayed()->nop(); | |
0 | 410 } |
411 #ifdef ASSERT | |
412 // assert object can be fast path allocated | |
413 { | |
414 Label ok, not_ok; | |
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415 __ ld(G5_klass, in_bytes(Klass::layout_helper_offset()), G1_obj_size); |
3839 | 416 // make sure it's an instance (LH > 0) |
417 __ cmp_and_br_short(G1_obj_size, 0, Assembler::lessEqual, Assembler::pn, not_ok); | |
0 | 418 __ btst(Klass::_lh_instance_slow_path_bit, G1_obj_size); |
419 __ br(Assembler::zero, false, Assembler::pn, ok); | |
420 __ delayed()->nop(); | |
421 __ bind(not_ok); | |
422 __ stop("assert(can be fast path allocated)"); | |
423 __ should_not_reach_here(); | |
424 __ bind(ok); | |
425 } | |
426 #endif // ASSERT | |
427 // if we got here then the TLAB allocation failed, so try | |
428 // refilling the TLAB or allocating directly from eden. | |
429 Label retry_tlab, try_eden; | |
430 __ tlab_refill(retry_tlab, try_eden, slow_path); // preserves G5_klass | |
431 | |
432 __ bind(retry_tlab); | |
433 | |
434 // get the instance size | |
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435 __ ld(G5_klass, in_bytes(Klass::layout_helper_offset()), G1_obj_size); |
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436 |
0 | 437 __ tlab_allocate(O0_obj, G1_obj_size, 0, G3_t1, slow_path); |
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438 |
0 | 439 __ initialize_object(O0_obj, G5_klass, G1_obj_size, 0, G3_t1, G4_t2); |
440 __ verify_oop(O0_obj); | |
441 __ mov(O0, I0); | |
442 __ ret(); | |
443 __ delayed()->restore(); | |
444 | |
445 __ bind(try_eden); | |
446 // get the instance size | |
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447 __ ld(G5_klass, in_bytes(Klass::layout_helper_offset()), G1_obj_size); |
0 | 448 __ eden_allocate(O0_obj, G1_obj_size, 0, G3_t1, G4_t2, slow_path); |
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449 __ incr_allocated_bytes(G1_obj_size, G3_t1, G4_t2); |
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450 |
0 | 451 __ initialize_object(O0_obj, G5_klass, G1_obj_size, 0, G3_t1, G4_t2); |
452 __ verify_oop(O0_obj); | |
453 __ mov(O0, I0); | |
454 __ ret(); | |
455 __ delayed()->restore(); | |
456 | |
457 __ bind(slow_path); | |
458 | |
459 // pop this frame so generate_stub_call can push it's own | |
460 __ restore(); | |
461 } | |
462 | |
463 oop_maps = generate_stub_call(sasm, I0, CAST_FROM_FN_PTR(address, new_instance), G5_klass); | |
464 // I0->O0: new instance | |
465 } | |
466 | |
467 break; | |
468 | |
469 case counter_overflow_id: | |
1783 | 470 // G4 contains bci, G5 contains method |
471 oop_maps = generate_stub_call(sasm, noreg, CAST_FROM_FN_PTR(address, counter_overflow), G4, G5); | |
0 | 472 break; |
473 | |
474 case new_type_array_id: | |
475 case new_object_array_id: | |
476 { | |
477 Register G5_klass = G5; // Incoming | |
478 Register G4_length = G4; // Incoming | |
479 Register O0_obj = O0; // Outgoing | |
480 | |
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481 Address klass_lh(G5_klass, Klass::layout_helper_offset()); |
0 | 482 assert(Klass::_lh_header_size_shift % BitsPerByte == 0, "bytewise"); |
483 assert(Klass::_lh_header_size_mask == 0xFF, "bytewise"); | |
484 // Use this offset to pick out an individual byte of the layout_helper: | |
485 const int klass_lh_header_size_offset = ((BytesPerInt - 1) // 3 - 2 selects byte {0,1,0,0} | |
486 - Klass::_lh_header_size_shift / BitsPerByte); | |
487 | |
488 if (id == new_type_array_id) { | |
489 __ set_info("new_type_array", dont_gc_arguments); | |
490 } else { | |
491 __ set_info("new_object_array", dont_gc_arguments); | |
492 } | |
493 | |
494 #ifdef ASSERT | |
495 // assert object type is really an array of the proper kind | |
496 { | |
497 Label ok; | |
498 Register G3_t1 = G3; | |
499 __ ld(klass_lh, G3_t1); | |
500 __ sra(G3_t1, Klass::_lh_array_tag_shift, G3_t1); | |
501 int tag = ((id == new_type_array_id) | |
502 ? Klass::_lh_array_tag_type_value | |
503 : Klass::_lh_array_tag_obj_value); | |
3839 | 504 __ cmp_and_brx_short(G3_t1, tag, Assembler::equal, Assembler::pt, ok); |
0 | 505 __ stop("assert(is an array klass)"); |
506 __ should_not_reach_here(); | |
507 __ bind(ok); | |
508 } | |
509 #endif // ASSERT | |
510 | |
511 if (UseTLAB && FastTLABRefill) { | |
512 Label slow_path; | |
513 Register G1_arr_size = G1; | |
514 Register G3_t1 = G3; | |
515 Register O1_t2 = O1; | |
516 assert_different_registers(G5_klass, G4_length, G1_arr_size, G3_t1, O1_t2); | |
517 | |
518 // check that array length is small enough for fast path | |
519 __ set(C1_MacroAssembler::max_array_allocation_length, G3_t1); | |
12955 | 520 __ cmp(G4_length, G3_t1); |
521 __ br(Assembler::greaterUnsigned, false, Assembler::pn, slow_path); | |
522 __ delayed()->nop(); | |
0 | 523 |
524 // if we got here then the TLAB allocation failed, so try | |
525 // refilling the TLAB or allocating directly from eden. | |
526 Label retry_tlab, try_eden; | |
527 __ tlab_refill(retry_tlab, try_eden, slow_path); // preserves G4_length and G5_klass | |
528 | |
529 __ bind(retry_tlab); | |
530 | |
531 // get the allocation size: (length << (layout_helper & 0x1F)) + header_size | |
532 __ ld(klass_lh, G3_t1); | |
533 __ sll(G4_length, G3_t1, G1_arr_size); | |
534 __ srl(G3_t1, Klass::_lh_header_size_shift, G3_t1); | |
535 __ and3(G3_t1, Klass::_lh_header_size_mask, G3_t1); | |
536 __ add(G1_arr_size, G3_t1, G1_arr_size); | |
537 __ add(G1_arr_size, MinObjAlignmentInBytesMask, G1_arr_size); // align up | |
538 __ and3(G1_arr_size, ~MinObjAlignmentInBytesMask, G1_arr_size); | |
539 | |
540 __ tlab_allocate(O0_obj, G1_arr_size, 0, G3_t1, slow_path); // preserves G1_arr_size | |
541 | |
542 __ initialize_header(O0_obj, G5_klass, G4_length, G3_t1, O1_t2); | |
543 __ ldub(klass_lh, G3_t1, klass_lh_header_size_offset); | |
544 __ sub(G1_arr_size, G3_t1, O1_t2); // body length | |
545 __ add(O0_obj, G3_t1, G3_t1); // body start | |
546 __ initialize_body(G3_t1, O1_t2); | |
547 __ verify_oop(O0_obj); | |
548 __ retl(); | |
549 __ delayed()->nop(); | |
550 | |
551 __ bind(try_eden); | |
552 // get the allocation size: (length << (layout_helper & 0x1F)) + header_size | |
553 __ ld(klass_lh, G3_t1); | |
554 __ sll(G4_length, G3_t1, G1_arr_size); | |
555 __ srl(G3_t1, Klass::_lh_header_size_shift, G3_t1); | |
556 __ and3(G3_t1, Klass::_lh_header_size_mask, G3_t1); | |
557 __ add(G1_arr_size, G3_t1, G1_arr_size); | |
558 __ add(G1_arr_size, MinObjAlignmentInBytesMask, G1_arr_size); | |
559 __ and3(G1_arr_size, ~MinObjAlignmentInBytesMask, G1_arr_size); | |
560 | |
561 __ eden_allocate(O0_obj, G1_arr_size, 0, G3_t1, O1_t2, slow_path); // preserves G1_arr_size | |
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562 __ incr_allocated_bytes(G1_arr_size, G3_t1, O1_t2); |
0 | 563 |
564 __ initialize_header(O0_obj, G5_klass, G4_length, G3_t1, O1_t2); | |
565 __ ldub(klass_lh, G3_t1, klass_lh_header_size_offset); | |
566 __ sub(G1_arr_size, G3_t1, O1_t2); // body length | |
567 __ add(O0_obj, G3_t1, G3_t1); // body start | |
568 __ initialize_body(G3_t1, O1_t2); | |
569 __ verify_oop(O0_obj); | |
570 __ retl(); | |
571 __ delayed()->nop(); | |
572 | |
573 __ bind(slow_path); | |
574 } | |
575 | |
576 if (id == new_type_array_id) { | |
577 oop_maps = generate_stub_call(sasm, I0, CAST_FROM_FN_PTR(address, new_type_array), G5_klass, G4_length); | |
578 } else { | |
579 oop_maps = generate_stub_call(sasm, I0, CAST_FROM_FN_PTR(address, new_object_array), G5_klass, G4_length); | |
580 } | |
581 // I0 -> O0: new array | |
582 } | |
583 break; | |
584 | |
585 case new_multi_array_id: | |
586 { // O0: klass | |
587 // O1: rank | |
588 // O2: address of 1st dimension | |
589 __ set_info("new_multi_array", dont_gc_arguments); | |
590 oop_maps = generate_stub_call(sasm, I0, CAST_FROM_FN_PTR(address, new_multi_array), I0, I1, I2); | |
591 // I0 -> O0: new multi array | |
592 } | |
593 break; | |
594 | |
595 case register_finalizer_id: | |
596 { | |
597 __ set_info("register_finalizer", dont_gc_arguments); | |
598 | |
599 // load the klass and check the has finalizer flag | |
600 Label register_finalizer; | |
601 Register t = O1; | |
2002 | 602 __ load_klass(O0, t); |
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603 __ ld(t, in_bytes(Klass::access_flags_offset()), t); |
0 | 604 __ set(JVM_ACC_HAS_FINALIZER, G3); |
605 __ andcc(G3, t, G0); | |
606 __ br(Assembler::notZero, false, Assembler::pt, register_finalizer); | |
607 __ delayed()->nop(); | |
608 | |
609 // do a leaf return | |
610 __ retl(); | |
611 __ delayed()->nop(); | |
612 | |
613 __ bind(register_finalizer); | |
614 OopMap* oop_map = save_live_registers(sasm); | |
615 int call_offset = __ call_RT(noreg, noreg, | |
616 CAST_FROM_FN_PTR(address, SharedRuntime::register_finalizer), I0); | |
617 oop_maps = new OopMapSet(); | |
618 oop_maps->add_gc_map(call_offset, oop_map); | |
619 | |
620 // Now restore all the live registers | |
621 restore_live_registers(sasm); | |
622 | |
623 __ ret(); | |
624 __ delayed()->restore(); | |
625 } | |
626 break; | |
627 | |
628 case throw_range_check_failed_id: | |
629 { __ set_info("range_check_failed", dont_gc_arguments); // arguments will be discarded | |
630 // G4: index | |
631 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_range_check_exception), true); | |
632 } | |
633 break; | |
634 | |
635 case throw_index_exception_id: | |
636 { __ set_info("index_range_check_failed", dont_gc_arguments); // arguments will be discarded | |
637 // G4: index | |
638 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_index_exception), true); | |
639 } | |
640 break; | |
641 | |
642 case throw_div0_exception_id: | |
643 { __ set_info("throw_div0_exception", dont_gc_arguments); | |
644 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_div0_exception), false); | |
645 } | |
646 break; | |
647 | |
648 case throw_null_pointer_exception_id: | |
649 { __ set_info("throw_null_pointer_exception", dont_gc_arguments); | |
650 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_null_pointer_exception), false); | |
651 } | |
652 break; | |
653 | |
654 case handle_exception_id: | |
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655 { __ set_info("handle_exception", dont_gc_arguments); |
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656 oop_maps = generate_handle_exception(id, sasm); |
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657 } |
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658 break; |
0 | 659 |
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660 case handle_exception_from_callee_id: |
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661 { __ set_info("handle_exception_from_callee", dont_gc_arguments); |
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662 oop_maps = generate_handle_exception(id, sasm); |
0 | 663 } |
664 break; | |
665 | |
666 case unwind_exception_id: | |
667 { | |
668 // O0: exception | |
669 // I7: address of call to this method | |
670 | |
671 __ set_info("unwind_exception", dont_gc_arguments); | |
672 __ mov(Oexception, Oexception->after_save()); | |
673 __ add(I7, frame::pc_return_offset, Oissuing_pc->after_save()); | |
674 | |
675 __ call_VM_leaf(L7_thread_cache, CAST_FROM_FN_PTR(address, SharedRuntime::exception_handler_for_return_address), | |
1295 | 676 G2_thread, Oissuing_pc->after_save()); |
0 | 677 __ verify_not_null_oop(Oexception->after_save()); |
1564 | 678 |
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679 // Restore SP from L7 if the exception PC is a method handle call site. |
1564 | 680 __ mov(O0, G5); // Save the target address. |
681 __ lduw(Address(G2_thread, JavaThread::is_method_handle_return_offset()), L0); | |
682 __ tst(L0); // Condition codes are preserved over the restore. | |
683 __ restore(); | |
684 | |
685 __ jmp(G5, 0); | |
686 __ delayed()->movcc(Assembler::notZero, false, Assembler::icc, L7_mh_SP_save, SP); // Restore SP if required. | |
0 | 687 } |
688 break; | |
689 | |
690 case throw_array_store_exception_id: | |
691 { | |
692 __ set_info("throw_array_store_exception", dont_gc_arguments); | |
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693 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_array_store_exception), true); |
0 | 694 } |
695 break; | |
696 | |
697 case throw_class_cast_exception_id: | |
698 { | |
699 // G4: object | |
700 __ set_info("throw_class_cast_exception", dont_gc_arguments); | |
701 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_class_cast_exception), true); | |
702 } | |
703 break; | |
704 | |
705 case throw_incompatible_class_change_error_id: | |
706 { | |
707 __ set_info("throw_incompatible_class_cast_exception", dont_gc_arguments); | |
708 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_incompatible_class_change_error), false); | |
709 } | |
710 break; | |
711 | |
712 case slow_subtype_check_id: | |
713 { // Support for uint StubRoutine::partial_subtype_check( Klass sub, Klass super ); | |
714 // Arguments : | |
715 // | |
716 // ret : G3 | |
717 // sub : G3, argument, destroyed | |
718 // super: G1, argument, not changed | |
719 // raddr: O7, blown by call | |
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720 Label miss; |
0 | 721 |
722 __ save_frame(0); // Blow no registers! | |
723 | |
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724 __ check_klass_subtype_slow_path(G3, G1, L0, L1, L2, L4, NULL, &miss); |
0 | 725 |
726 __ mov(1, G3); | |
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727 __ ret(); // Result in G5 is 'true' |
0 | 728 __ delayed()->restore(); // free copy or add can go here |
729 | |
730 __ bind(miss); | |
731 __ mov(0, G3); | |
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732 __ ret(); // Result in G5 is 'false' |
0 | 733 __ delayed()->restore(); // free copy or add can go here |
734 } | |
735 | |
736 case monitorenter_nofpu_id: | |
737 case monitorenter_id: | |
738 { // G4: object | |
739 // G5: lock address | |
740 __ set_info("monitorenter", dont_gc_arguments); | |
741 | |
742 int save_fpu_registers = (id == monitorenter_id); | |
743 // make a frame and preserve the caller's caller-save registers | |
744 OopMap* oop_map = save_live_registers(sasm, save_fpu_registers); | |
745 | |
746 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, monitorenter), G4, G5); | |
747 | |
748 oop_maps = new OopMapSet(); | |
749 oop_maps->add_gc_map(call_offset, oop_map); | |
750 restore_live_registers(sasm, save_fpu_registers); | |
751 | |
752 __ ret(); | |
753 __ delayed()->restore(); | |
754 } | |
755 break; | |
756 | |
757 case monitorexit_nofpu_id: | |
758 case monitorexit_id: | |
759 { // G4: lock address | |
760 // note: really a leaf routine but must setup last java sp | |
761 // => use call_RT for now (speed can be improved by | |
762 // doing last java sp setup manually) | |
763 __ set_info("monitorexit", dont_gc_arguments); | |
764 | |
765 int save_fpu_registers = (id == monitorexit_id); | |
766 // make a frame and preserve the caller's caller-save registers | |
767 OopMap* oop_map = save_live_registers(sasm, save_fpu_registers); | |
768 | |
769 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, monitorexit), G4); | |
770 | |
771 oop_maps = new OopMapSet(); | |
772 oop_maps->add_gc_map(call_offset, oop_map); | |
773 restore_live_registers(sasm, save_fpu_registers); | |
774 | |
775 __ ret(); | |
776 __ delayed()->restore(); | |
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777 } |
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778 break; |
0 | 779 |
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780 case deoptimize_id: |
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781 { |
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782 __ set_info("deoptimize", dont_gc_arguments); |
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783 OopMap* oop_map = save_live_registers(sasm); |
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784 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, deoptimize)); |
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785 oop_maps = new OopMapSet(); |
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786 oop_maps->add_gc_map(call_offset, oop_map); |
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787 restore_live_registers(sasm); |
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788 DeoptimizationBlob* deopt_blob = SharedRuntime::deopt_blob(); |
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789 assert(deopt_blob != NULL, "deoptimization blob must have been created"); |
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790 AddressLiteral dest(deopt_blob->unpack_with_reexecution()); |
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791 __ jump_to(dest, O0); |
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792 __ delayed()->restore(); |
0 | 793 } |
794 break; | |
795 | |
796 case access_field_patching_id: | |
797 { __ set_info("access_field_patching", dont_gc_arguments); | |
798 oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, access_field_patching)); | |
799 } | |
800 break; | |
801 | |
802 case load_klass_patching_id: | |
803 { __ set_info("load_klass_patching", dont_gc_arguments); | |
804 oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, move_klass_patching)); | |
805 } | |
806 break; | |
807 | |
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808 case load_mirror_patching_id: |
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809 { __ set_info("load_mirror_patching", dont_gc_arguments); |
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810 oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, move_mirror_patching)); |
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811 } |
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812 break; |
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813 |
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814 case load_appendix_patching_id: |
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815 { __ set_info("load_appendix_patching", dont_gc_arguments); |
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816 oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, move_appendix_patching)); |
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817 } |
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818 break; |
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819 |
0 | 820 case dtrace_object_alloc_id: |
821 { // O0: object | |
822 __ set_info("dtrace_object_alloc", dont_gc_arguments); | |
823 // we can't gc here so skip the oopmap but make sure that all | |
824 // the live registers get saved. | |
825 save_live_registers(sasm); | |
826 | |
827 __ save_thread(L7_thread_cache); | |
828 __ call(CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_object_alloc), | |
829 relocInfo::runtime_call_type); | |
830 __ delayed()->mov(I0, O0); | |
831 __ restore_thread(L7_thread_cache); | |
832 | |
833 restore_live_registers(sasm); | |
834 __ ret(); | |
835 __ delayed()->restore(); | |
836 } | |
837 break; | |
838 | |
8001
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839 #if INCLUDE_ALL_GCS |
342 | 840 case g1_pre_barrier_slow_id: |
841 { // G4: previous value of memory | |
842 BarrierSet* bs = Universe::heap()->barrier_set(); | |
843 if (bs->kind() != BarrierSet::G1SATBCTLogging) { | |
844 __ save_frame(0); | |
845 __ set((int)id, O1); | |
846 __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, unimplemented_entry), I0); | |
847 __ should_not_reach_here(); | |
848 break; | |
849 } | |
850 | |
851 __ set_info("g1_pre_barrier_slow_id", dont_gc_arguments); | |
852 | |
853 Register pre_val = G4; | |
854 Register tmp = G1_scratch; | |
855 Register tmp2 = G3_scratch; | |
856 | |
857 Label refill, restart; | |
858 bool with_frame = false; // I don't know if we can do with-frame. | |
859 int satb_q_index_byte_offset = | |
860 in_bytes(JavaThread::satb_mark_queue_offset() + | |
861 PtrQueue::byte_offset_of_index()); | |
862 int satb_q_buf_byte_offset = | |
863 in_bytes(JavaThread::satb_mark_queue_offset() + | |
864 PtrQueue::byte_offset_of_buf()); | |
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865 |
342 | 866 __ bind(restart); |
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867 // Load the index into the SATB buffer. PtrQueue::_index is a |
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868 // size_t so ld_ptr is appropriate |
342 | 869 __ ld_ptr(G2_thread, satb_q_index_byte_offset, tmp); |
870 | |
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871 // index == 0? |
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872 __ cmp_and_brx_short(tmp, G0, Assembler::equal, Assembler::pn, refill); |
342 | 873 |
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874 __ ld_ptr(G2_thread, satb_q_buf_byte_offset, tmp2); |
342 | 875 __ sub(tmp, oopSize, tmp); |
876 | |
877 __ st_ptr(pre_val, tmp2, tmp); // [_buf + index] := <address_of_card> | |
878 // Use return-from-leaf | |
879 __ retl(); | |
880 __ delayed()->st_ptr(tmp, G2_thread, satb_q_index_byte_offset); | |
881 | |
882 __ bind(refill); | |
883 __ save_frame(0); | |
884 | |
885 __ mov(pre_val, L0); | |
886 __ mov(tmp, L1); | |
887 __ mov(tmp2, L2); | |
888 | |
889 __ call_VM_leaf(L7_thread_cache, | |
890 CAST_FROM_FN_PTR(address, | |
891 SATBMarkQueueSet::handle_zero_index_for_thread), | |
892 G2_thread); | |
893 | |
894 __ mov(L0, pre_val); | |
895 __ mov(L1, tmp); | |
896 __ mov(L2, tmp2); | |
897 | |
898 __ br(Assembler::always, /*annul*/false, Assembler::pt, restart); | |
899 __ delayed()->restore(); | |
900 } | |
901 break; | |
902 | |
903 case g1_post_barrier_slow_id: | |
904 { | |
905 BarrierSet* bs = Universe::heap()->barrier_set(); | |
906 if (bs->kind() != BarrierSet::G1SATBCTLogging) { | |
907 __ save_frame(0); | |
908 __ set((int)id, O1); | |
909 __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, unimplemented_entry), I0); | |
910 __ should_not_reach_here(); | |
911 break; | |
912 } | |
913 | |
914 __ set_info("g1_post_barrier_slow_id", dont_gc_arguments); | |
915 | |
916 Register addr = G4; | |
917 Register cardtable = G5; | |
918 Register tmp = G1_scratch; | |
919 Register tmp2 = G3_scratch; | |
920 jbyte* byte_map_base = ((CardTableModRefBS*)bs)->byte_map_base; | |
921 | |
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922 Label not_already_dirty, restart, refill, young_card; |
342 | 923 |
924 #ifdef _LP64 | |
925 __ srlx(addr, CardTableModRefBS::card_shift, addr); | |
926 #else | |
927 __ srl(addr, CardTableModRefBS::card_shift, addr); | |
928 #endif | |
929 | |
727 | 930 AddressLiteral rs(byte_map_base); |
931 __ set(rs, cardtable); // cardtable := <card table base> | |
342 | 932 __ ldub(addr, cardtable, tmp); // tmp := [addr + cardtable] |
933 | |
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934 __ cmp_and_br_short(tmp, G1SATBCardTableModRefBS::g1_young_card_val(), Assembler::equal, Assembler::pt, young_card); |
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935 |
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936 __ membar(Assembler::Membar_mask_bits(Assembler::StoreLoad)); |
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937 __ ldub(addr, cardtable, tmp); // tmp := [addr + cardtable] |
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938 |
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939 assert(CardTableModRefBS::dirty_card_val() == 0, "otherwise check this code"); |
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940 __ cmp_and_br_short(tmp, G0, Assembler::notEqual, Assembler::pt, not_already_dirty); |
342 | 941 |
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942 __ bind(young_card); |
342 | 943 // We didn't take the branch, so we're already dirty: return. |
944 // Use return-from-leaf | |
945 __ retl(); | |
946 __ delayed()->nop(); | |
947 | |
948 // Not dirty. | |
949 __ bind(not_already_dirty); | |
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950 |
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951 // Get cardtable + tmp into a reg by itself |
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952 __ add(addr, cardtable, tmp2); |
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953 |
342 | 954 // First, dirty it. |
955 __ stb(G0, tmp2, 0); // [cardPtr] := 0 (i.e., dirty). | |
956 | |
957 Register tmp3 = cardtable; | |
958 Register tmp4 = tmp; | |
959 | |
960 // these registers are now dead | |
961 addr = cardtable = tmp = noreg; | |
962 | |
963 int dirty_card_q_index_byte_offset = | |
964 in_bytes(JavaThread::dirty_card_queue_offset() + | |
965 PtrQueue::byte_offset_of_index()); | |
966 int dirty_card_q_buf_byte_offset = | |
967 in_bytes(JavaThread::dirty_card_queue_offset() + | |
968 PtrQueue::byte_offset_of_buf()); | |
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969 |
342 | 970 __ bind(restart); |
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971 |
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972 // Get the index into the update buffer. PtrQueue::_index is |
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973 // a size_t so ld_ptr is appropriate here. |
342 | 974 __ ld_ptr(G2_thread, dirty_card_q_index_byte_offset, tmp3); |
975 | |
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976 // index == 0? |
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977 __ cmp_and_brx_short(tmp3, G0, Assembler::equal, Assembler::pn, refill); |
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978 |
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979 __ ld_ptr(G2_thread, dirty_card_q_buf_byte_offset, tmp4); |
342 | 980 __ sub(tmp3, oopSize, tmp3); |
981 | |
982 __ st_ptr(tmp2, tmp4, tmp3); // [_buf + index] := <address_of_card> | |
983 // Use return-from-leaf | |
984 __ retl(); | |
985 __ delayed()->st_ptr(tmp3, G2_thread, dirty_card_q_index_byte_offset); | |
986 | |
987 __ bind(refill); | |
988 __ save_frame(0); | |
989 | |
990 __ mov(tmp2, L0); | |
991 __ mov(tmp3, L1); | |
992 __ mov(tmp4, L2); | |
993 | |
994 __ call_VM_leaf(L7_thread_cache, | |
995 CAST_FROM_FN_PTR(address, | |
996 DirtyCardQueueSet::handle_zero_index_for_thread), | |
997 G2_thread); | |
998 | |
999 __ mov(L0, tmp2); | |
1000 __ mov(L1, tmp3); | |
1001 __ mov(L2, tmp4); | |
1002 | |
1003 __ br(Assembler::always, /*annul*/false, Assembler::pt, restart); | |
1004 __ delayed()->restore(); | |
1005 } | |
1006 break; | |
8001
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1007 #endif // INCLUDE_ALL_GCS |
342 | 1008 |
8860 | 1009 case predicate_failed_trap_id: |
1010 { | |
1011 __ set_info("predicate_failed_trap", dont_gc_arguments); | |
1012 OopMap* oop_map = save_live_registers(sasm); | |
1013 | |
1014 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, predicate_failed_trap)); | |
1015 | |
1016 oop_maps = new OopMapSet(); | |
1017 oop_maps->add_gc_map(call_offset, oop_map); | |
1018 | |
1019 DeoptimizationBlob* deopt_blob = SharedRuntime::deopt_blob(); | |
1020 assert(deopt_blob != NULL, "deoptimization blob must have been created"); | |
1021 restore_live_registers(sasm); | |
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1022 |
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1023 AddressLiteral dest(deopt_blob->unpack_with_reexecution()); |
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1024 __ jump_to(dest, O0); |
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1025 __ delayed()->restore(); |
8860 | 1026 } |
1027 break; | |
1028 | |
0 | 1029 default: |
1030 { __ set_info("unimplemented entry", dont_gc_arguments); | |
1031 __ save_frame(0); | |
1032 __ set((int)id, O1); | |
1033 __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, unimplemented_entry), O1); | |
1034 __ should_not_reach_here(); | |
1035 } | |
1036 break; | |
1037 } | |
1038 return oop_maps; | |
1039 } | |
1040 | |
1041 | |
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1042 OopMapSet* Runtime1::generate_handle_exception(StubID id, StubAssembler* sasm) { |
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1043 __ block_comment("generate_handle_exception"); |
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1044 |
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1045 // Save registers, if required. |
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1046 OopMapSet* oop_maps = new OopMapSet(); |
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1047 OopMap* oop_map = NULL; |
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1048 switch (id) { |
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1049 case forward_exception_id: |
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1050 // We're handling an exception in the context of a compiled frame. |
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1051 // The registers have been saved in the standard places. Perform |
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1052 // an exception lookup in the caller and dispatch to the handler |
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1053 // if found. Otherwise unwind and dispatch to the callers |
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1054 // exception handler. |
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1055 oop_map = generate_oop_map(sasm, true); |
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1056 |
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1057 // transfer the pending exception to the exception_oop |
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1058 __ ld_ptr(G2_thread, in_bytes(JavaThread::pending_exception_offset()), Oexception); |
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1059 __ ld_ptr(Oexception, 0, G0); |
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1060 __ st_ptr(G0, G2_thread, in_bytes(JavaThread::pending_exception_offset())); |
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1061 __ add(I7, frame::pc_return_offset, Oissuing_pc); |
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1062 break; |
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1063 case handle_exception_id: |
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1064 // At this point all registers MAY be live. |
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1065 oop_map = save_live_registers(sasm); |
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1066 __ mov(Oexception->after_save(), Oexception); |
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1067 __ mov(Oissuing_pc->after_save(), Oissuing_pc); |
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1068 break; |
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1069 case handle_exception_from_callee_id: |
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1070 // At this point all registers except exception oop (Oexception) |
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1071 // and exception pc (Oissuing_pc) are dead. |
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1072 oop_map = new OopMap(frame_size_in_bytes / sizeof(jint), 0); |
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1073 sasm->set_frame_size(frame_size_in_bytes / BytesPerWord); |
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1074 __ save_frame_c1(frame_size_in_bytes); |
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1075 __ mov(Oexception->after_save(), Oexception); |
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1076 __ mov(Oissuing_pc->after_save(), Oissuing_pc); |
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1077 break; |
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1078 default: ShouldNotReachHere(); |
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1079 } |
0 | 1080 |
1081 __ verify_not_null_oop(Oexception); | |
1082 | |
12876
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1083 #ifdef ASSERT |
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1084 // check that fields in JavaThread for exception oop and issuing pc are |
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1085 // empty before writing to them |
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1086 Label oop_empty; |
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1087 Register scratch = I7; // We can use I7 here because it's overwritten later anyway. |
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1088 __ ld_ptr(Address(G2_thread, JavaThread::exception_oop_offset()), scratch); |
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1089 __ br_null(scratch, false, Assembler::pt, oop_empty); |
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1090 __ delayed()->nop(); |
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1091 __ stop("exception oop already set"); |
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1092 __ bind(oop_empty); |
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1093 |
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1094 Label pc_empty; |
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1095 __ ld_ptr(Address(G2_thread, JavaThread::exception_pc_offset()), scratch); |
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1096 __ br_null(scratch, false, Assembler::pt, pc_empty); |
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1097 __ delayed()->nop(); |
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1098 __ stop("exception pc already set"); |
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1099 __ bind(pc_empty); |
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1100 #endif |
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1101 |
0 | 1102 // save the exception and issuing pc in the thread |
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1103 __ st_ptr(Oexception, G2_thread, in_bytes(JavaThread::exception_oop_offset())); |
0 | 1104 __ st_ptr(Oissuing_pc, G2_thread, in_bytes(JavaThread::exception_pc_offset())); |
1105 | |
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1106 // use the throwing pc as the return address to lookup (has bci & oop map) |
0 | 1107 __ mov(Oissuing_pc, I7); |
1108 __ sub(I7, frame::pc_return_offset, I7); | |
1109 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, exception_handler_for_pc)); | |
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1110 oop_maps->add_gc_map(call_offset, oop_map); |
0 | 1111 |
1112 // Note: if nmethod has been deoptimized then regardless of | |
1113 // whether it had a handler or not we will deoptimize | |
1114 // by entering the deopt blob with a pending exception. | |
1115 | |
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1116 // Restore the registers that were saved at the beginning, remove |
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1117 // the frame and jump to the exception handler. |
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1118 switch (id) { |
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1119 case forward_exception_id: |
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1120 case handle_exception_id: |
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1121 restore_live_registers(sasm); |
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1122 __ jmp(O0, 0); |
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1123 __ delayed()->restore(); |
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1124 break; |
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1125 case handle_exception_from_callee_id: |
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1126 // Restore SP from L7 if the exception PC is a method handle call site. |
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1127 __ mov(O0, G5); // Save the target address. |
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1128 __ lduw(Address(G2_thread, JavaThread::is_method_handle_return_offset()), L0); |
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1129 __ tst(L0); // Condition codes are preserved over the restore. |
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1130 __ restore(); |
0 | 1131 |
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1132 __ jmp(G5, 0); // jump to the exception handler |
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1133 __ delayed()->movcc(Assembler::notZero, false, Assembler::icc, L7_mh_SP_save, SP); // Restore SP if required. |
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1134 break; |
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1135 default: ShouldNotReachHere(); |
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1136 } |
0 | 1137 |
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1138 return oop_maps; |
0 | 1139 } |
1140 | |
1141 | |
1142 #undef __ | |
1143 | |
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1144 const char *Runtime1::pd_name_for_address(address entry) { |
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1145 return "<unknown function>"; |
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1146 } |