1 /*
2 * Copyright (c) 1997, 2016, Oracle and/or its affiliates. All rights reserved.
3 * Copyright (c) 2012, 2015 SAP SE. All rights reserved.
4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
5 *
6 * This code is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License version 2 only, as
8 * published by the Free Software Foundation.
9 *
10 * This code is distributed in the hope that it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
13 * version 2 for more details (a copy is included in the LICENSE file that
14 * accompanied this code).
15 *
16 * You should have received a copy of the GNU General Public License version
17 * 2 along with this work; if not, write to the Free Software Foundation,
18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
19 *
20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
21 * or visit www.oracle.com if you need additional information or have any
22 * questions.
23 *
24 */
25
26 #include "precompiled.hpp"
27 #include "asm/macroAssembler.inline.hpp"
28 #include "classfile/javaClasses.inline.hpp"
29 #include "interpreter/interpreter.hpp"
30 #include "memory/allocation.inline.hpp"
31 #include "memory/resourceArea.hpp"
32 #include "prims/methodHandles.hpp"
33
34 #define __ _masm->
35
36 #ifdef PRODUCT
37 #define BLOCK_COMMENT(str) // nothing
38 #else
39 #define BLOCK_COMMENT(str) __ block_comment(str)
40 #endif
41
42 #define BIND(label) bind(label); BLOCK_COMMENT(#label ":")
43
44 // Workaround for C++ overloading nastiness on '0' for RegisterOrConstant.
45 inline static RegisterOrConstant constant(int value) {
46 return RegisterOrConstant(value);
47 }
48
49 void MethodHandles::load_klass_from_Class(MacroAssembler* _masm, Register klass_reg,
50 Register temp_reg, Register temp2_reg) {
51 if (VerifyMethodHandles) {
52 verify_klass(_masm, klass_reg, SystemDictionary::WK_KLASS_ENUM_NAME(java_lang_Class),
53 temp_reg, temp2_reg, "MH argument is a Class");
54 }
55 __ ld(klass_reg, java_lang_Class::klass_offset_in_bytes(), klass_reg);
56 }
57
58 #ifdef ASSERT
59 static int check_nonzero(const char* xname, int x) {
60 assert(x != 0, "%s should be nonzero", xname);
61 return x;
62 }
63 #define NONZERO(x) check_nonzero(#x, x)
64 #else //ASSERT
65 #define NONZERO(x) (x)
66 #endif //ASSERT
67
68 #ifdef ASSERT
69 void MethodHandles::verify_klass(MacroAssembler* _masm,
70 Register obj_reg, SystemDictionary::WKID klass_id,
71 Register temp_reg, Register temp2_reg,
72 const char* error_message) {
73 InstanceKlass** klass_addr = SystemDictionary::well_known_klass_addr(klass_id);
74 KlassHandle klass = SystemDictionary::well_known_klass(klass_id);
75 Label L_ok, L_bad;
76 BLOCK_COMMENT("verify_klass {");
77 __ verify_oop(obj_reg);
78 __ cmpdi(CCR0, obj_reg, 0);
79 __ beq(CCR0, L_bad);
80 __ load_klass(temp_reg, obj_reg);
81 __ load_const_optimized(temp2_reg, (address) klass_addr);
82 __ ld(temp2_reg, 0, temp2_reg);
83 __ cmpd(CCR0, temp_reg, temp2_reg);
84 __ beq(CCR0, L_ok);
85 __ ld(temp_reg, klass->super_check_offset(), temp_reg);
86 __ cmpd(CCR0, temp_reg, temp2_reg);
87 __ beq(CCR0, L_ok);
88 __ BIND(L_bad);
89 __ stop(error_message);
90 __ BIND(L_ok);
91 BLOCK_COMMENT("} verify_klass");
92 }
93
94 void MethodHandles::verify_ref_kind(MacroAssembler* _masm, int ref_kind, Register member_reg, Register temp) {
95 Label L;
96 BLOCK_COMMENT("verify_ref_kind {");
97 __ load_sized_value(temp, NONZERO(java_lang_invoke_MemberName::flags_offset_in_bytes()), member_reg,
98 sizeof(u4), /*is_signed*/ false);
99 // assert(sizeof(u4) == sizeof(java.lang.invoke.MemberName.flags), "");
100 __ srwi( temp, temp, java_lang_invoke_MemberName::MN_REFERENCE_KIND_SHIFT);
101 __ andi(temp, temp, java_lang_invoke_MemberName::MN_REFERENCE_KIND_MASK);
102 __ cmpwi(CCR1, temp, ref_kind);
103 __ beq(CCR1, L);
104 { char* buf = NEW_C_HEAP_ARRAY(char, 100, mtInternal);
105 jio_snprintf(buf, 100, "verify_ref_kind expected %x", ref_kind);
106 if (ref_kind == JVM_REF_invokeVirtual ||
107 ref_kind == JVM_REF_invokeSpecial)
108 // could do this for all ref_kinds, but would explode assembly code size
109 trace_method_handle(_masm, buf);
110 __ stop(buf);
111 }
112 BLOCK_COMMENT("} verify_ref_kind");
113 __ BIND(L);
114 }
115
116 #endif // ASSERT
117
118 void MethodHandles::jump_from_method_handle(MacroAssembler* _masm, Register method, Register target, Register temp,
119 bool for_compiler_entry) {
120 Label L_no_such_method;
121 assert(method == R19_method, "interpreter calling convention");
122 assert_different_registers(method, target, temp);
123
124 if (!for_compiler_entry && JvmtiExport::can_post_interpreter_events()) {
125 Label run_compiled_code;
126 // JVMTI events, such as single-stepping, are implemented partly by avoiding running
127 // compiled code in threads for which the event is enabled. Check here for
128 // interp_only_mode if these events CAN be enabled.
129 __ verify_thread();
130 __ lwz(temp, in_bytes(JavaThread::interp_only_mode_offset()), R16_thread);
131 __ cmplwi(CCR0, temp, 0);
132 __ beq(CCR0, run_compiled_code);
133 // Null method test is replicated below in compiled case,
134 // it might be able to address across the verify_thread()
135 __ cmplwi(CCR0, R19_method, 0);
136 __ beq(CCR0, L_no_such_method);
137 __ ld(target, in_bytes(Method::interpreter_entry_offset()), R19_method);
138 __ mtctr(target);
139 __ bctr();
140 __ BIND(run_compiled_code);
141 }
142
143 // Compiled case, either static or fall-through from runtime conditional
144 __ cmplwi(CCR0, R19_method, 0);
145 __ beq(CCR0, L_no_such_method);
146
147 const ByteSize entry_offset = for_compiler_entry ? Method::from_compiled_offset() :
148 Method::from_interpreted_offset();
149 __ ld(target, in_bytes(entry_offset), R19_method);
150 __ mtctr(target);
151 __ bctr();
152
153 __ bind(L_no_such_method);
154 assert(StubRoutines::throw_AbstractMethodError_entry() != NULL, "not yet generated!");
155 __ load_const_optimized(target, StubRoutines::throw_AbstractMethodError_entry());
156 __ mtctr(target);
157 __ bctr();
158 }
159
160
161 void MethodHandles::jump_to_lambda_form(MacroAssembler* _masm,
162 Register recv, Register method_temp,
163 Register temp2, Register temp3,
164 bool for_compiler_entry) {
165 BLOCK_COMMENT("jump_to_lambda_form {");
166 // This is the initial entry point of a lazy method handle.
167 // After type checking, it picks up the invoker from the LambdaForm.
168 assert_different_registers(recv, method_temp, temp2); // temp3 is only passed on
169 assert(method_temp == R19_method, "required register for loading method");
170
171 // Load the invoker, as MH -> MH.form -> LF.vmentry
172 __ verify_oop(recv);
173 __ load_heap_oop_not_null(method_temp, NONZERO(java_lang_invoke_MethodHandle::form_offset_in_bytes()), recv, temp2);
174 __ verify_oop(method_temp);
175 __ load_heap_oop_not_null(method_temp, NONZERO(java_lang_invoke_LambdaForm::vmentry_offset_in_bytes()), method_temp, temp2);
176 __ verify_oop(method_temp);
177 // The following assumes that a Method* is normally compressed in the vmtarget field:
178 __ ld(method_temp, NONZERO(java_lang_invoke_MemberName::vmtarget_offset_in_bytes()), method_temp);
179
180 if (VerifyMethodHandles && !for_compiler_entry) {
181 // Make sure recv is already on stack.
182 __ ld(temp2, in_bytes(Method::const_offset()), method_temp);
183 __ load_sized_value(temp2, in_bytes(ConstMethod::size_of_parameters_offset()), temp2,
184 sizeof(u2), /*is_signed*/ false);
185 // assert(sizeof(u2) == sizeof(ConstMethod::_size_of_parameters), "");
186 Label L;
187 __ ld(temp2, __ argument_offset(temp2, temp2, 0), R15_esp);
188 __ cmpd(CCR1, temp2, recv);
189 __ beq(CCR1, L);
190 __ stop("receiver not on stack");
191 __ BIND(L);
192 }
193
194 jump_from_method_handle(_masm, method_temp, temp2, temp3, for_compiler_entry);
195 BLOCK_COMMENT("} jump_to_lambda_form");
196 }
197
198
199
200 // Code generation
201 address MethodHandles::generate_method_handle_interpreter_entry(MacroAssembler* _masm,
202 vmIntrinsics::ID iid) {
203 const bool not_for_compiler_entry = false; // this is the interpreter entry
204 assert(is_signature_polymorphic(iid), "expected invoke iid");
205 if (iid == vmIntrinsics::_invokeGeneric ||
206 iid == vmIntrinsics::_compiledLambdaForm) {
207 // Perhaps surprisingly, the symbolic references visible to Java are not directly used.
208 // They are linked to Java-generated adapters via MethodHandleNatives.linkMethod.
209 // They all allow an appendix argument.
210 __ stop("Should not reach here"); // empty stubs make SG sick
211 return NULL;
212 }
213
214 Register argbase = R15_esp; // parameter (preserved)
215 Register argslot = R3;
216 Register temp1 = R6;
217 Register param_size = R7;
218
219 // here's where control starts out:
220 __ align(CodeEntryAlignment);
221 address entry_point = __ pc();
222
223 if (VerifyMethodHandles) {
224 assert(Method::intrinsic_id_size_in_bytes() == 2, "assuming Method::_intrinsic_id is u2");
225
226 Label L;
227 BLOCK_COMMENT("verify_intrinsic_id {");
228 __ load_sized_value(temp1, Method::intrinsic_id_offset_in_bytes(), R19_method,
229 sizeof(u2), /*is_signed*/ false);
230 __ cmpwi(CCR1, temp1, (int) iid);
231 __ beq(CCR1, L);
232 if (iid == vmIntrinsics::_linkToVirtual ||
233 iid == vmIntrinsics::_linkToSpecial) {
234 // could do this for all kinds, but would explode assembly code size
235 trace_method_handle(_masm, "bad Method*:intrinsic_id");
236 }
237 __ stop("bad Method*::intrinsic_id");
238 __ BIND(L);
239 BLOCK_COMMENT("} verify_intrinsic_id");
240 }
241
242 // First task: Find out how big the argument list is.
243 int ref_kind = signature_polymorphic_intrinsic_ref_kind(iid);
244 assert(ref_kind != 0 || iid == vmIntrinsics::_invokeBasic, "must be _invokeBasic or a linkTo intrinsic");
245 if (ref_kind == 0 || MethodHandles::ref_kind_has_receiver(ref_kind)) {
246 __ ld(param_size, in_bytes(Method::const_offset()), R19_method);
247 __ load_sized_value(param_size, in_bytes(ConstMethod::size_of_parameters_offset()), param_size,
248 sizeof(u2), /*is_signed*/ false);
249 // assert(sizeof(u2) == sizeof(ConstMethod::_size_of_parameters), "");
250 } else {
251 DEBUG_ONLY(param_size = noreg);
252 }
253
254 Register tmp_mh = noreg;
255 if (!is_signature_polymorphic_static(iid)) {
256 __ ld(tmp_mh = temp1, __ argument_offset(param_size, param_size, 0), argbase);
257 DEBUG_ONLY(param_size = noreg);
258 }
259
260 if (TraceMethodHandles) {
261 if (tmp_mh != noreg) {
262 __ mr(R23_method_handle, tmp_mh); // make stub happy
263 }
264 trace_method_handle_interpreter_entry(_masm, iid);
265 }
266
267 if (iid == vmIntrinsics::_invokeBasic) {
268 generate_method_handle_dispatch(_masm, iid, tmp_mh, noreg, not_for_compiler_entry);
269
270 } else {
271 // Adjust argument list by popping the trailing MemberName argument.
272 Register tmp_recv = noreg;
273 if (MethodHandles::ref_kind_has_receiver(ref_kind)) {
274 // Load the receiver (not the MH; the actual MemberName's receiver) up from the interpreter stack.
275 __ ld(tmp_recv = temp1, __ argument_offset(param_size, param_size, 0), argbase);
276 DEBUG_ONLY(param_size = noreg);
277 }
278 Register R19_member = R19_method; // MemberName ptr; incoming method ptr is dead now
279 __ ld(R19_member, RegisterOrConstant((intptr_t)8), argbase);
280 __ add(argbase, Interpreter::stackElementSize, argbase);
281 generate_method_handle_dispatch(_masm, iid, tmp_recv, R19_member, not_for_compiler_entry);
282 }
283
284 return entry_point;
285 }
286
287 void MethodHandles::generate_method_handle_dispatch(MacroAssembler* _masm,
288 vmIntrinsics::ID iid,
289 Register receiver_reg,
290 Register member_reg,
291 bool for_compiler_entry) {
292 assert(is_signature_polymorphic(iid), "expected invoke iid");
293 Register temp1 = (for_compiler_entry ? R25_tmp5 : R7);
294 Register temp2 = (for_compiler_entry ? R22_tmp2 : R8);
295 Register temp3 = (for_compiler_entry ? R23_tmp3 : R9);
296 Register temp4 = (for_compiler_entry ? R24_tmp4 : R10);
297 if (receiver_reg != noreg) assert_different_registers(temp1, temp2, temp3, temp4, receiver_reg);
298 if (member_reg != noreg) assert_different_registers(temp1, temp2, temp3, temp4, member_reg);
299
300 if (iid == vmIntrinsics::_invokeBasic) {
301 // indirect through MH.form.vmentry.vmtarget
302 jump_to_lambda_form(_masm, receiver_reg, R19_method, temp1, temp2, for_compiler_entry);
303 } else {
304 // The method is a member invoker used by direct method handles.
305 if (VerifyMethodHandles) {
306 // make sure the trailing argument really is a MemberName (caller responsibility)
307 verify_klass(_masm, member_reg, SystemDictionary::WK_KLASS_ENUM_NAME(MemberName_klass),
308 temp1, temp2,
309 "MemberName required for invokeVirtual etc.");
310 }
311
312 Register temp1_recv_klass = temp1;
313 if (iid != vmIntrinsics::_linkToStatic) {
314 __ verify_oop(receiver_reg);
315 if (iid == vmIntrinsics::_linkToSpecial) {
316 // Don't actually load the klass; just null-check the receiver.
317 __ null_check_throw(receiver_reg, -1, temp1,
318 Interpreter::throw_NullPointerException_entry());
319 } else {
320 // load receiver klass itself
321 __ null_check_throw(receiver_reg, oopDesc::klass_offset_in_bytes(), temp1,
322 Interpreter::throw_NullPointerException_entry());
323 __ load_klass(temp1_recv_klass, receiver_reg);
324 __ verify_klass_ptr(temp1_recv_klass);
325 }
326 BLOCK_COMMENT("check_receiver {");
327 // The receiver for the MemberName must be in receiver_reg.
328 // Check the receiver against the MemberName.clazz
329 if (VerifyMethodHandles && iid == vmIntrinsics::_linkToSpecial) {
330 // Did not load it above...
331 __ load_klass(temp1_recv_klass, receiver_reg);
332 __ verify_klass_ptr(temp1_recv_klass);
333 }
334 if (VerifyMethodHandles && iid != vmIntrinsics::_linkToInterface) {
335 Label L_ok;
336 Register temp2_defc = temp2;
337 __ load_heap_oop_not_null(temp2_defc, NONZERO(java_lang_invoke_MemberName::clazz_offset_in_bytes()), member_reg, temp3);
338 load_klass_from_Class(_masm, temp2_defc, temp3, temp4);
339 __ verify_klass_ptr(temp2_defc);
340 __ check_klass_subtype(temp1_recv_klass, temp2_defc, temp3, temp4, L_ok);
341 // If we get here, the type check failed!
342 __ stop("receiver class disagrees with MemberName.clazz");
343 __ BIND(L_ok);
344 }
345 BLOCK_COMMENT("} check_receiver");
346 }
347 if (iid == vmIntrinsics::_linkToSpecial ||
348 iid == vmIntrinsics::_linkToStatic) {
349 DEBUG_ONLY(temp1_recv_klass = noreg); // these guys didn't load the recv_klass
350 }
351
352 // Live registers at this point:
353 // member_reg - MemberName that was the trailing argument
354 // temp1_recv_klass - klass of stacked receiver, if needed
355 // O5_savedSP - interpreter linkage (if interpreted)
356 // O0..O5 - compiler arguments (if compiled)
357
358 Label L_incompatible_class_change_error;
359 switch (iid) {
360 case vmIntrinsics::_linkToSpecial:
361 if (VerifyMethodHandles) {
362 verify_ref_kind(_masm, JVM_REF_invokeSpecial, member_reg, temp2);
363 }
364 __ ld(R19_method, NONZERO(java_lang_invoke_MemberName::vmtarget_offset_in_bytes()), member_reg);
365 break;
366
367 case vmIntrinsics::_linkToStatic:
368 if (VerifyMethodHandles) {
369 verify_ref_kind(_masm, JVM_REF_invokeStatic, member_reg, temp2);
370 }
371 __ ld(R19_method, NONZERO(java_lang_invoke_MemberName::vmtarget_offset_in_bytes()), member_reg);
372 break;
373
374 case vmIntrinsics::_linkToVirtual:
375 {
376 // same as TemplateTable::invokevirtual,
377 // minus the CP setup and profiling:
378
379 if (VerifyMethodHandles) {
380 verify_ref_kind(_masm, JVM_REF_invokeVirtual, member_reg, temp2);
381 }
382
383 // pick out the vtable index from the MemberName, and then we can discard it:
384 Register temp2_index = temp2;
385 __ ld(temp2_index, NONZERO(java_lang_invoke_MemberName::vmindex_offset_in_bytes()), member_reg);
386
387 if (VerifyMethodHandles) {
388 Label L_index_ok;
389 __ cmpdi(CCR1, temp2_index, 0);
390 __ bge(CCR1, L_index_ok);
391 __ stop("no virtual index");
392 __ BIND(L_index_ok);
393 }
394
395 // Note: The verifier invariants allow us to ignore MemberName.clazz and vmtarget
396 // at this point. And VerifyMethodHandles has already checked clazz, if needed.
397
398 // get target Method* & entry point
399 __ lookup_virtual_method(temp1_recv_klass, temp2_index, R19_method);
400 break;
401 }
402
403 case vmIntrinsics::_linkToInterface:
404 {
405 // same as TemplateTable::invokeinterface
406 // (minus the CP setup and profiling, with different argument motion)
407 if (VerifyMethodHandles) {
408 verify_ref_kind(_masm, JVM_REF_invokeInterface, member_reg, temp2);
409 }
410
411 Register temp2_intf = temp2;
412 __ load_heap_oop_not_null(temp2_intf, NONZERO(java_lang_invoke_MemberName::clazz_offset_in_bytes()), member_reg, temp3);
413 load_klass_from_Class(_masm, temp2_intf, temp3, temp4);
414 __ verify_klass_ptr(temp2_intf);
415
416 Register vtable_index = R19_method;
417 __ ld(vtable_index, NONZERO(java_lang_invoke_MemberName::vmindex_offset_in_bytes()), member_reg);
418 if (VerifyMethodHandles) {
419 Label L_index_ok;
420 __ cmpdi(CCR1, vtable_index, 0);
421 __ bge(CCR1, L_index_ok);
422 __ stop("invalid vtable index for MH.invokeInterface");
423 __ BIND(L_index_ok);
424 }
425
426 // given intf, index, and recv klass, dispatch to the implementation method
427 __ lookup_interface_method(temp1_recv_klass, temp2_intf,
428 // note: next two args must be the same:
429 vtable_index, R19_method,
430 temp3, temp4,
431 L_incompatible_class_change_error);
432 break;
433 }
434
435 default:
436 fatal("unexpected intrinsic %d: %s", iid, vmIntrinsics::name_at(iid));
437 break;
438 }
439
440 // Live at this point:
441 // R19_method
442 // O5_savedSP (if interpreted)
443
444 // After figuring out which concrete method to call, jump into it.
445 // Note that this works in the interpreter with no data motion.
446 // But the compiled version will require that rcx_recv be shifted out.
447 __ verify_method_ptr(R19_method);
448 jump_from_method_handle(_masm, R19_method, temp1, temp2, for_compiler_entry);
449
450 if (iid == vmIntrinsics::_linkToInterface) {
451 __ BIND(L_incompatible_class_change_error);
452 __ load_const_optimized(temp1, StubRoutines::throw_IncompatibleClassChangeError_entry());
453 __ mtctr(temp1);
454 __ bctr();
455 }
456 }
457 }
458
459 #ifndef PRODUCT
460 void trace_method_handle_stub(const char* adaptername,
461 oopDesc* mh,
462 intptr_t* entry_sp,
463 intptr_t* saved_regs) {
464
465 bool has_mh = (strstr(adaptername, "/static") == NULL &&
466 strstr(adaptername, "linkTo") == NULL); // static linkers don't have MH
467 const char* mh_reg_name = has_mh ? "R23_method_handle" : "G23";
468 tty->print_cr("MH %s %s=" INTPTR_FORMAT " sp=" INTPTR_FORMAT,
469 adaptername, mh_reg_name, p2i(mh), p2i(entry_sp));
470
471 if (Verbose) {
472 tty->print_cr("Registers:");
473 const int abi_offset = frame::abi_reg_args_size / 8;
474 for (int i = R3->encoding(); i <= R12->encoding(); i++) {
475 Register r = as_Register(i);
476 int count = i - R3->encoding();
477 // The registers are stored in reverse order on the stack (by save_volatile_gprs(R1_SP, abi_reg_args_size)).
478 tty->print("%3s=" PTR_FORMAT, r->name(), saved_regs[abi_offset + count]);
479 if ((count + 1) % 4 == 0) {
480 tty->cr();
481 } else {
482 tty->print(", ");
483 }
484 }
485 tty->cr();
486
487 {
488 // dumping last frame with frame::describe
489
490 JavaThread* p = JavaThread::active();
491
492 ResourceMark rm;
493 PRESERVE_EXCEPTION_MARK; // may not be needed by safer and unexpensive here
494 FrameValues values;
495
496 // Note: We want to allow trace_method_handle from any call site.
497 // While trace_method_handle creates a frame, it may be entered
498 // without a PC on the stack top (e.g. not just after a call).
499 // Walking that frame could lead to failures due to that invalid PC.
500 // => carefully detect that frame when doing the stack walking
501
502 // Current C frame
503 frame cur_frame = os::current_frame();
504
505 // Robust search of trace_calling_frame (independant of inlining).
506 assert(cur_frame.sp() <= saved_regs, "registers not saved on stack ?");
507 frame trace_calling_frame = os::get_sender_for_C_frame(&cur_frame);
508 while (trace_calling_frame.fp() < saved_regs) {
509 trace_calling_frame = os::get_sender_for_C_frame(&trace_calling_frame);
510 }
511
512 // Safely create a frame and call frame::describe.
513 intptr_t *dump_sp = trace_calling_frame.sender_sp();
514
515 frame dump_frame = frame(dump_sp);
516 dump_frame.describe(values, 1);
517
518 values.describe(-1, saved_regs, "raw top of stack");
519
520 tty->print_cr("Stack layout:");
521 values.print(p);
522 }
523
524 if (has_mh && mh->is_oop()) {
525 mh->print();
526 if (java_lang_invoke_MethodHandle::is_instance(mh)) {
527 if (java_lang_invoke_MethodHandle::form_offset_in_bytes() != 0)
528 java_lang_invoke_MethodHandle::form(mh)->print();
529 }
530 }
531 }
532 }
533
534 void MethodHandles::trace_method_handle(MacroAssembler* _masm, const char* adaptername) {
535 if (!TraceMethodHandles) return;
536
537 BLOCK_COMMENT("trace_method_handle {");
538
539 const Register tmp = R11; // Will be preserved.
540 const int nbytes_save = MacroAssembler::num_volatile_regs * 8;
541 __ save_volatile_gprs(R1_SP, -nbytes_save); // except R0
542 __ save_LR_CR(tmp); // save in old frame
543
544 __ mr(R5_ARG3, R1_SP); // saved_sp
545 __ push_frame_reg_args(nbytes_save, tmp);
546
547 __ load_const_optimized(R3_ARG1, (address)adaptername, tmp);
548 __ mr(R4_ARG2, R23_method_handle);
549 __ mr(R6_ARG4, R1_SP);
550 __ call_VM_leaf(CAST_FROM_FN_PTR(address, trace_method_handle_stub));
551
552 __ pop_frame();
553 __ restore_LR_CR(tmp);
554 __ restore_volatile_gprs(R1_SP, -nbytes_save); // except R0
555
556 BLOCK_COMMENT("} trace_method_handle");
557 }
558 #endif // PRODUCT
--- EOF ---