1 /*
2 * Copyright (c) 1997, 2017, 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 Klass* 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 __ load_heap_oop_not_null(method_temp, NONZERO(java_lang_invoke_MemberName::method_offset_in_bytes()), method_temp);
178 __ verify_oop(method_temp);
179 __ ld(method_temp, NONZERO(java_lang_invoke_ResolvedMethodName::vmtarget_offset_in_bytes()), method_temp);
180
181 if (VerifyMethodHandles && !for_compiler_entry) {
182 // Make sure recv is already on stack.
183 __ ld(temp2, in_bytes(Method::const_offset()), method_temp);
184 __ load_sized_value(temp2, in_bytes(ConstMethod::size_of_parameters_offset()), temp2,
185 sizeof(u2), /*is_signed*/ false);
186 // assert(sizeof(u2) == sizeof(ConstMethod::_size_of_parameters), "");
187 Label L;
188 __ ld(temp2, __ argument_offset(temp2, temp2, 0), R15_esp);
189 __ cmpd(CCR1, temp2, recv);
190 __ beq(CCR1, L);
191 __ stop("receiver not on stack");
192 __ BIND(L);
193 }
194
195 jump_from_method_handle(_masm, method_temp, temp2, temp3, for_compiler_entry);
196 BLOCK_COMMENT("} jump_to_lambda_form");
197 }
198
199
200
201 // Code generation
202 address MethodHandles::generate_method_handle_interpreter_entry(MacroAssembler* _masm,
203 vmIntrinsics::ID iid) {
204 const bool not_for_compiler_entry = false; // this is the interpreter entry
205 assert(is_signature_polymorphic(iid), "expected invoke iid");
206 if (iid == vmIntrinsics::_invokeGeneric ||
207 iid == vmIntrinsics::_compiledLambdaForm) {
208 // Perhaps surprisingly, the symbolic references visible to Java are not directly used.
209 // They are linked to Java-generated adapters via MethodHandleNatives.linkMethod.
210 // They all allow an appendix argument.
211 __ stop("Should not reach here"); // empty stubs make SG sick
212 return NULL;
213 }
214
215 Register argbase = R15_esp; // parameter (preserved)
216 Register argslot = R3;
217 Register temp1 = R6;
218 Register param_size = R7;
219
220 // here's where control starts out:
221 __ align(CodeEntryAlignment);
222 address entry_point = __ pc();
223
224 if (VerifyMethodHandles) {
225 assert(Method::intrinsic_id_size_in_bytes() == 2, "assuming Method::_intrinsic_id is u2");
226
227 Label L;
228 BLOCK_COMMENT("verify_intrinsic_id {");
229 __ load_sized_value(temp1, Method::intrinsic_id_offset_in_bytes(), R19_method,
230 sizeof(u2), /*is_signed*/ false);
231 __ cmpwi(CCR1, temp1, (int) iid);
232 __ beq(CCR1, L);
233 if (iid == vmIntrinsics::_linkToVirtual ||
234 iid == vmIntrinsics::_linkToSpecial) {
235 // could do this for all kinds, but would explode assembly code size
236 trace_method_handle(_masm, "bad Method*:intrinsic_id");
237 }
238 __ stop("bad Method*::intrinsic_id");
239 __ BIND(L);
240 BLOCK_COMMENT("} verify_intrinsic_id");
241 }
242
243 // First task: Find out how big the argument list is.
244 int ref_kind = signature_polymorphic_intrinsic_ref_kind(iid);
245 assert(ref_kind != 0 || iid == vmIntrinsics::_invokeBasic, "must be _invokeBasic or a linkTo intrinsic");
246 if (ref_kind == 0 || MethodHandles::ref_kind_has_receiver(ref_kind)) {
247 __ ld(param_size, in_bytes(Method::const_offset()), R19_method);
248 __ load_sized_value(param_size, in_bytes(ConstMethod::size_of_parameters_offset()), param_size,
249 sizeof(u2), /*is_signed*/ false);
250 // assert(sizeof(u2) == sizeof(ConstMethod::_size_of_parameters), "");
251 } else {
252 DEBUG_ONLY(param_size = noreg);
253 }
254
255 Register tmp_mh = noreg;
256 if (!is_signature_polymorphic_static(iid)) {
257 __ ld(tmp_mh = temp1, __ argument_offset(param_size, param_size, 0), argbase);
258 DEBUG_ONLY(param_size = noreg);
259 }
260
261 if (TraceMethodHandles) {
262 if (tmp_mh != noreg) {
263 __ mr(R23_method_handle, tmp_mh); // make stub happy
264 }
265 trace_method_handle_interpreter_entry(_masm, iid);
266 }
267
268 if (iid == vmIntrinsics::_invokeBasic) {
269 generate_method_handle_dispatch(_masm, iid, tmp_mh, noreg, not_for_compiler_entry);
270
271 } else {
272 // Adjust argument list by popping the trailing MemberName argument.
273 Register tmp_recv = noreg;
274 if (MethodHandles::ref_kind_has_receiver(ref_kind)) {
275 // Load the receiver (not the MH; the actual MemberName's receiver) up from the interpreter stack.
276 __ ld(tmp_recv = temp1, __ argument_offset(param_size, param_size, 0), argbase);
277 DEBUG_ONLY(param_size = noreg);
278 }
279 Register R19_member = R19_method; // MemberName ptr; incoming method ptr is dead now
280 __ ld(R19_member, RegisterOrConstant((intptr_t)8), argbase);
281 __ add(argbase, Interpreter::stackElementSize, argbase);
282 generate_method_handle_dispatch(_masm, iid, tmp_recv, R19_member, not_for_compiler_entry);
283 }
284
285 return entry_point;
286 }
287
288 void MethodHandles::generate_method_handle_dispatch(MacroAssembler* _masm,
289 vmIntrinsics::ID iid,
290 Register receiver_reg,
291 Register member_reg,
292 bool for_compiler_entry) {
293 assert(is_signature_polymorphic(iid), "expected invoke iid");
294 Register temp1 = (for_compiler_entry ? R25_tmp5 : R7);
295 Register temp2 = (for_compiler_entry ? R22_tmp2 : R8);
296 Register temp3 = (for_compiler_entry ? R23_tmp3 : R9);
297 Register temp4 = (for_compiler_entry ? R24_tmp4 : R10);
298 if (receiver_reg != noreg) assert_different_registers(temp1, temp2, temp3, temp4, receiver_reg);
299 if (member_reg != noreg) assert_different_registers(temp1, temp2, temp3, temp4, member_reg);
300
301 if (iid == vmIntrinsics::_invokeBasic) {
302 // indirect through MH.form.vmentry.vmtarget
303 jump_to_lambda_form(_masm, receiver_reg, R19_method, temp1, temp2, for_compiler_entry);
304 } else {
305 // The method is a member invoker used by direct method handles.
306 if (VerifyMethodHandles) {
307 // make sure the trailing argument really is a MemberName (caller responsibility)
308 verify_klass(_masm, member_reg, SystemDictionary::WK_KLASS_ENUM_NAME(MemberName_klass),
309 temp1, temp2,
310 "MemberName required for invokeVirtual etc.");
311 }
312
313 Register temp1_recv_klass = temp1;
314 if (iid != vmIntrinsics::_linkToStatic) {
315 __ verify_oop(receiver_reg);
316 if (iid == vmIntrinsics::_linkToSpecial) {
317 // Don't actually load the klass; just null-check the receiver.
318 __ null_check_throw(receiver_reg, -1, temp1,
319 Interpreter::throw_NullPointerException_entry());
320 } else {
321 // load receiver klass itself
322 __ null_check_throw(receiver_reg, oopDesc::klass_offset_in_bytes(), temp1,
323 Interpreter::throw_NullPointerException_entry());
324 __ load_klass(temp1_recv_klass, receiver_reg);
325 __ verify_klass_ptr(temp1_recv_klass);
326 }
327 BLOCK_COMMENT("check_receiver {");
328 // The receiver for the MemberName must be in receiver_reg.
329 // Check the receiver against the MemberName.clazz
330 if (VerifyMethodHandles && iid == vmIntrinsics::_linkToSpecial) {
331 // Did not load it above...
332 __ load_klass(temp1_recv_klass, receiver_reg);
333 __ verify_klass_ptr(temp1_recv_klass);
334 }
335 if (VerifyMethodHandles && iid != vmIntrinsics::_linkToInterface) {
336 Label L_ok;
337 Register temp2_defc = temp2;
338 __ load_heap_oop_not_null(temp2_defc, NONZERO(java_lang_invoke_MemberName::clazz_offset_in_bytes()), member_reg, temp3);
339 load_klass_from_Class(_masm, temp2_defc, temp3, temp4);
340 __ verify_klass_ptr(temp2_defc);
341 __ check_klass_subtype(temp1_recv_klass, temp2_defc, temp3, temp4, L_ok);
342 // If we get here, the type check failed!
343 __ stop("receiver class disagrees with MemberName.clazz");
344 __ BIND(L_ok);
345 }
346 BLOCK_COMMENT("} check_receiver");
347 }
348 if (iid == vmIntrinsics::_linkToSpecial ||
349 iid == vmIntrinsics::_linkToStatic) {
350 DEBUG_ONLY(temp1_recv_klass = noreg); // these guys didn't load the recv_klass
351 }
352
353 // Live registers at this point:
354 // member_reg - MemberName that was the trailing argument
355 // temp1_recv_klass - klass of stacked receiver, if needed
356 // O5_savedSP - interpreter linkage (if interpreted)
357 // O0..O5 - compiler arguments (if compiled)
358
359 Label L_incompatible_class_change_error;
360 switch (iid) {
361 case vmIntrinsics::_linkToSpecial:
362 if (VerifyMethodHandles) {
363 verify_ref_kind(_masm, JVM_REF_invokeSpecial, member_reg, temp2);
364 }
365 __ load_heap_oop(member_reg, NONZERO(java_lang_invoke_MemberName::method_offset_in_bytes()), member_reg);
366 __ ld(R19_method, NONZERO(java_lang_invoke_ResolvedMethodName::vmtarget_offset_in_bytes()), member_reg);
367 break;
368
369 case vmIntrinsics::_linkToStatic:
370 if (VerifyMethodHandles) {
371 verify_ref_kind(_masm, JVM_REF_invokeStatic, member_reg, temp2);
372 }
373 __ load_heap_oop(member_reg, NONZERO(java_lang_invoke_MemberName::method_offset_in_bytes()), member_reg);
374 __ ld(R19_method, NONZERO(java_lang_invoke_ResolvedMethodName::vmtarget_offset_in_bytes()), member_reg);
375 break;
376
377 case vmIntrinsics::_linkToVirtual:
378 {
379 // same as TemplateTable::invokevirtual,
380 // minus the CP setup and profiling:
381
382 if (VerifyMethodHandles) {
383 verify_ref_kind(_masm, JVM_REF_invokeVirtual, member_reg, temp2);
384 }
385
386 // pick out the vtable index from the MemberName, and then we can discard it:
387 Register temp2_index = temp2;
388 __ ld(temp2_index, NONZERO(java_lang_invoke_MemberName::vmindex_offset_in_bytes()), member_reg);
389
390 if (VerifyMethodHandles) {
391 Label L_index_ok;
392 __ cmpdi(CCR1, temp2_index, 0);
393 __ bge(CCR1, L_index_ok);
394 __ stop("no virtual index");
395 __ BIND(L_index_ok);
396 }
397
398 // Note: The verifier invariants allow us to ignore MemberName.clazz and vmtarget
399 // at this point. And VerifyMethodHandles has already checked clazz, if needed.
400
401 // get target Method* & entry point
402 __ lookup_virtual_method(temp1_recv_klass, temp2_index, R19_method);
403 break;
404 }
405
406 case vmIntrinsics::_linkToInterface:
407 {
408 // same as TemplateTable::invokeinterface
409 // (minus the CP setup and profiling, with different argument motion)
410 if (VerifyMethodHandles) {
411 verify_ref_kind(_masm, JVM_REF_invokeInterface, member_reg, temp2);
412 }
413
414 Register temp2_intf = temp2;
415 __ load_heap_oop_not_null(temp2_intf, NONZERO(java_lang_invoke_MemberName::clazz_offset_in_bytes()), member_reg, temp3);
416 load_klass_from_Class(_masm, temp2_intf, temp3, temp4);
417 __ verify_klass_ptr(temp2_intf);
418
419 Register vtable_index = R19_method;
420 __ ld(vtable_index, NONZERO(java_lang_invoke_MemberName::vmindex_offset_in_bytes()), member_reg);
421 if (VerifyMethodHandles) {
422 Label L_index_ok;
423 __ cmpdi(CCR1, vtable_index, 0);
424 __ bge(CCR1, L_index_ok);
425 __ stop("invalid vtable index for MH.invokeInterface");
426 __ BIND(L_index_ok);
427 }
428
429 // given intf, index, and recv klass, dispatch to the implementation method
430 __ lookup_interface_method(temp1_recv_klass, temp2_intf,
431 // note: next two args must be the same:
432 vtable_index, R19_method,
433 temp3, temp4,
434 L_incompatible_class_change_error);
435 break;
436 }
437
438 default:
439 fatal("unexpected intrinsic %d: %s", iid, vmIntrinsics::name_at(iid));
440 break;
441 }
442
443 // Live at this point:
444 // R19_method
445 // O5_savedSP (if interpreted)
446
447 // After figuring out which concrete method to call, jump into it.
448 // Note that this works in the interpreter with no data motion.
449 // But the compiled version will require that rcx_recv be shifted out.
450 __ verify_method_ptr(R19_method);
451 jump_from_method_handle(_masm, R19_method, temp1, temp2, for_compiler_entry);
452
453 if (iid == vmIntrinsics::_linkToInterface) {
454 __ BIND(L_incompatible_class_change_error);
455 __ load_const_optimized(temp1, StubRoutines::throw_IncompatibleClassChangeError_entry());
456 __ mtctr(temp1);
457 __ bctr();
458 }
459 }
460 }
461
462 #ifndef PRODUCT
463 void trace_method_handle_stub(const char* adaptername,
464 oopDesc* mh,
465 intptr_t* entry_sp,
466 intptr_t* saved_regs) {
467
468 bool has_mh = (strstr(adaptername, "/static") == NULL &&
469 strstr(adaptername, "linkTo") == NULL); // static linkers don't have MH
470 const char* mh_reg_name = has_mh ? "R23_method_handle" : "G23";
471 tty->print_cr("MH %s %s=" INTPTR_FORMAT " sp=" INTPTR_FORMAT,
472 adaptername, mh_reg_name, p2i(mh), p2i(entry_sp));
473
474 if (Verbose) {
475 tty->print_cr("Registers:");
476 const int abi_offset = frame::abi_reg_args_size / 8;
477 for (int i = R3->encoding(); i <= R12->encoding(); i++) {
478 Register r = as_Register(i);
479 int count = i - R3->encoding();
480 // The registers are stored in reverse order on the stack (by save_volatile_gprs(R1_SP, abi_reg_args_size)).
481 tty->print("%3s=" PTR_FORMAT, r->name(), saved_regs[abi_offset + count]);
482 if ((count + 1) % 4 == 0) {
483 tty->cr();
484 } else {
485 tty->print(", ");
486 }
487 }
488 tty->cr();
489
490 {
491 // dumping last frame with frame::describe
492
493 JavaThread* p = JavaThread::active();
494
495 ResourceMark rm;
496 PRESERVE_EXCEPTION_MARK; // may not be needed by safer and unexpensive here
497 FrameValues values;
498
499 // Note: We want to allow trace_method_handle from any call site.
500 // While trace_method_handle creates a frame, it may be entered
501 // without a PC on the stack top (e.g. not just after a call).
502 // Walking that frame could lead to failures due to that invalid PC.
503 // => carefully detect that frame when doing the stack walking
504
505 // Current C frame
506 frame cur_frame = os::current_frame();
507
508 // Robust search of trace_calling_frame (independant of inlining).
509 assert(cur_frame.sp() <= saved_regs, "registers not saved on stack ?");
510 frame trace_calling_frame = os::get_sender_for_C_frame(&cur_frame);
511 while (trace_calling_frame.fp() < saved_regs) {
512 trace_calling_frame = os::get_sender_for_C_frame(&trace_calling_frame);
513 }
514
515 // Safely create a frame and call frame::describe.
516 intptr_t *dump_sp = trace_calling_frame.sender_sp();
517
518 frame dump_frame = frame(dump_sp);
519 dump_frame.describe(values, 1);
520
521 values.describe(-1, saved_regs, "raw top of stack");
522
523 tty->print_cr("Stack layout:");
524 values.print(p);
525 }
526
527 if (has_mh && mh->is_oop()) {
528 mh->print();
529 if (java_lang_invoke_MethodHandle::is_instance(mh)) {
530 if (java_lang_invoke_MethodHandle::form_offset_in_bytes() != 0)
531 java_lang_invoke_MethodHandle::form(mh)->print();
532 }
533 }
534 }
535 }
536
537 void MethodHandles::trace_method_handle(MacroAssembler* _masm, const char* adaptername) {
538 if (!TraceMethodHandles) return;
539
540 BLOCK_COMMENT("trace_method_handle {");
541
542 const Register tmp = R11; // Will be preserved.
543 const int nbytes_save = MacroAssembler::num_volatile_regs * 8;
544 __ save_volatile_gprs(R1_SP, -nbytes_save); // except R0
545 __ save_LR_CR(tmp); // save in old frame
546
547 __ mr(R5_ARG3, R1_SP); // saved_sp
548 __ push_frame_reg_args(nbytes_save, tmp);
549
550 __ load_const_optimized(R3_ARG1, (address)adaptername, tmp);
551 __ mr(R4_ARG2, R23_method_handle);
552 __ mr(R6_ARG4, R1_SP);
553 __ call_VM_leaf(CAST_FROM_FN_PTR(address, trace_method_handle_stub));
554
555 __ pop_frame();
556 __ restore_LR_CR(tmp);
557 __ restore_volatile_gprs(R1_SP, -nbytes_save); // except R0
558
559 BLOCK_COMMENT("} trace_method_handle");
560 }
561 #endif // PRODUCT