1 /*
2 * Copyright (c) 1997, 2015, Oracle and/or its affiliates. All rights reserved.
3 * Copyright 2012, 2014 SAP AG. 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 "prims/methodHandles.hpp"
32
33 #define __ _masm->
34
35 #ifdef CC_INTERP
36 #define EXCEPTION_ENTRY StubRoutines::throw_NullPointerException_at_call_entry()
37 #else
38 #define EXCEPTION_ENTRY Interpreter::throw_NullPointerException_entry()
39 #endif
40
41 #ifdef PRODUCT
42 #define BLOCK_COMMENT(str) // nothing
43 #else
44 #define BLOCK_COMMENT(str) __ block_comment(str)
45 #endif
46
47 #define BIND(label) bind(label); BLOCK_COMMENT(#label ":")
48
49 // Workaround for C++ overloading nastiness on '0' for RegisterOrConstant.
50 inline static RegisterOrConstant constant(int value) {
51 return RegisterOrConstant(value);
52 }
53
54 void MethodHandles::load_klass_from_Class(MacroAssembler* _masm, Register klass_reg, Register temp_reg, Register temp2_reg) {
55 if (VerifyMethodHandles)
56 verify_klass(_masm, klass_reg, SystemDictionary::WK_KLASS_ENUM_NAME(java_lang_Class), temp_reg, temp2_reg,
57 "MH argument is a Class");
58 __ ld(klass_reg, java_lang_Class::klass_offset_in_bytes(), klass_reg);
59 }
60
61 #ifdef ASSERT
62 static int check_nonzero(const char* xname, int x) {
63 assert(x != 0, err_msg("%s should be nonzero", xname));
64 return x;
65 }
66 #define NONZERO(x) check_nonzero(#x, x)
67 #else //ASSERT
68 #define NONZERO(x) (x)
69 #endif //ASSERT
70
71 #ifdef ASSERT
72 void MethodHandles::verify_klass(MacroAssembler* _masm,
73 Register obj_reg, SystemDictionary::WKID klass_id,
74 Register temp_reg, Register temp2_reg,
75 const char* error_message) {
76 Klass** klass_addr = SystemDictionary::well_known_klass_addr(klass_id);
77 KlassHandle klass = SystemDictionary::well_known_klass(klass_id);
78 Label L_ok, L_bad;
79 BLOCK_COMMENT("verify_klass {");
80 __ verify_oop(obj_reg);
81 __ cmpdi(CCR0, obj_reg, 0);
82 __ beq(CCR0, L_bad);
83 __ load_klass(temp_reg, obj_reg);
84 __ load_const_optimized(temp2_reg, (address) klass_addr);
85 __ ld(temp2_reg, 0, temp2_reg);
86 __ cmpd(CCR0, temp_reg, temp2_reg);
87 __ beq(CCR0, L_ok);
88 __ ld(temp_reg, klass->super_check_offset(), temp_reg);
89 __ cmpd(CCR0, temp_reg, temp2_reg);
90 __ beq(CCR0, L_ok);
91 __ BIND(L_bad);
92 __ stop(error_message);
93 __ BIND(L_ok);
94 BLOCK_COMMENT("} verify_klass");
95 }
96
97 void MethodHandles::verify_ref_kind(MacroAssembler* _masm, int ref_kind, Register member_reg, Register temp) {
98 Label L;
99 BLOCK_COMMENT("verify_ref_kind {");
100 __ load_sized_value(temp, NONZERO(java_lang_invoke_MemberName::flags_offset_in_bytes()), member_reg,
101 sizeof(u4), /*is_signed*/ false);
102 // assert(sizeof(u4) == sizeof(java.lang.invoke.MemberName.flags), "");
103 __ srwi( temp, temp, java_lang_invoke_MemberName::MN_REFERENCE_KIND_SHIFT);
104 __ andi(temp, temp, java_lang_invoke_MemberName::MN_REFERENCE_KIND_MASK);
105 __ cmpwi(CCR1, temp, ref_kind);
106 __ beq(CCR1, L);
107 { char* buf = NEW_C_HEAP_ARRAY(char, 100, mtInternal);
108 jio_snprintf(buf, 100, "verify_ref_kind expected %x", ref_kind);
109 if (ref_kind == JVM_REF_invokeVirtual ||
110 ref_kind == JVM_REF_invokeSpecial)
111 // could do this for all ref_kinds, but would explode assembly code size
112 trace_method_handle(_masm, buf);
113 __ stop(buf);
114 }
115 BLOCK_COMMENT("} verify_ref_kind");
116 __ BIND(L);
117 }
118
119 #endif // ASSERT
120
121 void MethodHandles::jump_from_method_handle(MacroAssembler* _masm, Register method, Register target, Register temp,
122 bool for_compiler_entry) {
123 Label L_no_such_method;
124 assert(method == R19_method, "interpreter calling convention");
125 assert_different_registers(method, target, temp);
126
127 if (!for_compiler_entry && JvmtiExport::can_post_interpreter_events()) {
128 Label run_compiled_code;
129 // JVMTI events, such as single-stepping, are implemented partly by avoiding running
130 // compiled code in threads for which the event is enabled. Check here for
131 // interp_only_mode if these events CAN be enabled.
132 __ verify_thread();
133 __ lwz(temp, in_bytes(JavaThread::interp_only_mode_offset()), R16_thread);
134 __ cmplwi(CCR0, temp, 0);
135 __ beq(CCR0, run_compiled_code);
136 // Null method test is replicated below in compiled case,
137 // it might be able to address across the verify_thread()
138 __ cmplwi(CCR0, R19_method, 0);
139 __ beq(CCR0, L_no_such_method);
140 __ ld(target, in_bytes(Method::interpreter_entry_offset()), R19_method);
141 __ mtctr(target);
142 __ bctr();
143 __ BIND(run_compiled_code);
144 }
145
146 // Compiled case, either static or fall-through from runtime conditional
147 __ cmplwi(CCR0, R19_method, 0);
148 __ beq(CCR0, L_no_such_method);
149
150 const ByteSize entry_offset = for_compiler_entry ? Method::from_compiled_offset() :
151 Method::from_interpreted_offset();
152 __ ld(target, in_bytes(entry_offset), R19_method);
153 __ mtctr(target);
154 __ bctr();
155
156 __ bind(L_no_such_method);
157 assert(StubRoutines::throw_AbstractMethodError_entry() != NULL, "not yet generated!");
158 __ load_const_optimized(target, StubRoutines::throw_AbstractMethodError_entry());
159 __ mtctr(target);
160 __ bctr();
161 }
162
163
164 void MethodHandles::jump_to_lambda_form(MacroAssembler* _masm,
165 Register recv, Register method_temp,
166 Register temp2, Register temp3,
167 bool for_compiler_entry) {
168 BLOCK_COMMENT("jump_to_lambda_form {");
169 // This is the initial entry point of a lazy method handle.
170 // After type checking, it picks up the invoker from the LambdaForm.
171 assert_different_registers(recv, method_temp, temp2); // temp3 is only passed on
172 assert(method_temp == R19_method, "required register for loading method");
173
174 // Load the invoker, as MH -> MH.form -> LF.vmentry
175 __ verify_oop(recv);
176 __ load_heap_oop_not_null(method_temp, NONZERO(java_lang_invoke_MethodHandle::form_offset_in_bytes()), recv, temp2);
177 __ verify_oop(method_temp);
178 __ load_heap_oop_not_null(method_temp, NONZERO(java_lang_invoke_LambdaForm::vmentry_offset_in_bytes()), method_temp, temp2);
179 __ verify_oop(method_temp);
180 // The following assumes that a Method* is normally compressed in the vmtarget field:
181 __ ld(method_temp, NONZERO(java_lang_invoke_MemberName::vmtarget_offset_in_bytes()), method_temp);
182
183 if (VerifyMethodHandles && !for_compiler_entry) {
184 // Make sure recv is already on stack.
185 __ ld(temp2, in_bytes(Method::const_offset()), method_temp);
186 __ load_sized_value(temp2, in_bytes(ConstMethod::size_of_parameters_offset()), temp2,
187 sizeof(u2), /*is_signed*/ false);
188 // assert(sizeof(u2) == sizeof(ConstMethod::_size_of_parameters), "");
189 Label L;
190 __ ld(temp2, __ argument_offset(temp2, temp2, 0), CC_INTERP_ONLY(R17_tos) NOT_CC_INTERP(R15_esp));
191 __ cmpd(CCR1, temp2, recv);
192 __ beq(CCR1, L);
193 __ stop("receiver not on stack");
194 __ BIND(L);
195 }
196
197 jump_from_method_handle(_masm, method_temp, temp2, temp3, for_compiler_entry);
198 BLOCK_COMMENT("} jump_to_lambda_form");
199 }
200
201
202
203 // Code generation
204 address MethodHandles::generate_method_handle_interpreter_entry(MacroAssembler* _masm,
205 vmIntrinsics::ID iid) {
206 const bool not_for_compiler_entry = false; // this is the interpreter entry
207 assert(is_signature_polymorphic(iid), "expected invoke iid");
208 if (iid == vmIntrinsics::_invokeGeneric ||
209 iid == vmIntrinsics::_compiledLambdaForm) {
210 // Perhaps surprisingly, the symbolic references visible to Java are not directly used.
211 // They are linked to Java-generated adapters via MethodHandleNatives.linkMethod.
212 // They all allow an appendix argument.
213 __ stop("Should not reach here"); // empty stubs make SG sick
214 return NULL;
215 }
216
217 Register argbase = CC_INTERP_ONLY(R17_tos) NOT_CC_INTERP(R15_esp); // parameter (preserved)
218 Register argslot = R3;
219 Register temp1 = R6;
220 Register param_size = R7;
221
222 // here's where control starts out:
223 __ align(CodeEntryAlignment);
224 address entry_point = __ pc();
225
226 if (VerifyMethodHandles) {
227 assert(Method::intrinsic_id_size_in_bytes() == 2, "assuming Method::_intrinsic_id is u2");
228
229 Label L;
230 BLOCK_COMMENT("verify_intrinsic_id {");
231 __ load_sized_value(temp1, Method::intrinsic_id_offset_in_bytes(), R19_method,
232 sizeof(u2), /*is_signed*/ false);
233 __ cmpwi(CCR1, temp1, (int) iid);
234 __ beq(CCR1, L);
235 if (iid == vmIntrinsics::_linkToVirtual ||
236 iid == vmIntrinsics::_linkToSpecial) {
237 // could do this for all kinds, but would explode assembly code size
238 trace_method_handle(_masm, "bad Method*:intrinsic_id");
239 }
240 __ stop("bad Method*::intrinsic_id");
241 __ BIND(L);
242 BLOCK_COMMENT("} verify_intrinsic_id");
243 }
244
245 // First task: Find out how big the argument list is.
246 int ref_kind = signature_polymorphic_intrinsic_ref_kind(iid);
247 assert(ref_kind != 0 || iid == vmIntrinsics::_invokeBasic, "must be _invokeBasic or a linkTo intrinsic");
248 if (ref_kind == 0 || MethodHandles::ref_kind_has_receiver(ref_kind)) {
249 __ ld(param_size, in_bytes(Method::const_offset()), R19_method);
250 __ load_sized_value(param_size, in_bytes(ConstMethod::size_of_parameters_offset()), param_size,
251 sizeof(u2), /*is_signed*/ false);
252 // assert(sizeof(u2) == sizeof(ConstMethod::_size_of_parameters), "");
253 } else {
254 DEBUG_ONLY(param_size = noreg);
255 }
256
257 Register tmp_mh = noreg;
258 if (!is_signature_polymorphic_static(iid)) {
259 __ ld(tmp_mh = temp1, __ argument_offset(param_size, param_size, 0), argbase);
260 DEBUG_ONLY(param_size = noreg);
261 }
262
263 if (TraceMethodHandles) {
264 if (tmp_mh != noreg) {
265 __ mr(R23_method_handle, tmp_mh); // make stub happy
266 }
267 trace_method_handle_interpreter_entry(_masm, iid);
268 }
269
270 if (iid == vmIntrinsics::_invokeBasic) {
271 generate_method_handle_dispatch(_masm, iid, tmp_mh, noreg, not_for_compiler_entry);
272
273 } else {
274 // Adjust argument list by popping the trailing MemberName argument.
275 Register tmp_recv = noreg;
276 if (MethodHandles::ref_kind_has_receiver(ref_kind)) {
277 // Load the receiver (not the MH; the actual MemberName's receiver) up from the interpreter stack.
278 __ ld(tmp_recv = temp1, __ argument_offset(param_size, param_size, 0), argbase);
279 DEBUG_ONLY(param_size = noreg);
280 }
281 Register R19_member = R19_method; // MemberName ptr; incoming method ptr is dead now
282 __ ld(R19_member, RegisterOrConstant((intptr_t)8), argbase);
283 __ add(argbase, Interpreter::stackElementSize, argbase);
284 generate_method_handle_dispatch(_masm, iid, tmp_recv, R19_member, not_for_compiler_entry);
285 }
286
287 return entry_point;
288 }
289
290 void MethodHandles::generate_method_handle_dispatch(MacroAssembler* _masm,
291 vmIntrinsics::ID iid,
292 Register receiver_reg,
293 Register member_reg,
294 bool for_compiler_entry) {
295 assert(is_signature_polymorphic(iid), "expected invoke iid");
296 Register temp1 = (for_compiler_entry ? R25_tmp5 : R7);
297 Register temp2 = (for_compiler_entry ? R22_tmp2 : R8);
298 Register temp3 = (for_compiler_entry ? R23_tmp3 : R9);
299 Register temp4 = (for_compiler_entry ? R24_tmp4 : R10);
300 if (receiver_reg != noreg) assert_different_registers(temp1, temp2, temp3, temp4, receiver_reg);
301 if (member_reg != noreg) assert_different_registers(temp1, temp2, temp3, temp4, member_reg);
302
303 if (iid == vmIntrinsics::_invokeBasic) {
304 // indirect through MH.form.vmentry.vmtarget
305 jump_to_lambda_form(_masm, receiver_reg, R19_method, temp1, temp2, for_compiler_entry);
306 } else {
307 // The method is a member invoker used by direct method handles.
308 if (VerifyMethodHandles) {
309 // make sure the trailing argument really is a MemberName (caller responsibility)
310 verify_klass(_masm, member_reg, SystemDictionary::WK_KLASS_ENUM_NAME(MemberName_klass),
311 temp1, temp2,
312 "MemberName required for invokeVirtual etc.");
313 }
314
315 Register temp1_recv_klass = temp1;
316 if (iid != vmIntrinsics::_linkToStatic) {
317 __ verify_oop(receiver_reg);
318 if (iid == vmIntrinsics::_linkToSpecial) {
319 // Don't actually load the klass; just null-check the receiver.
320 __ null_check_throw(receiver_reg, -1, temp1, EXCEPTION_ENTRY);
321 } else {
322 // load receiver klass itself
323 __ null_check_throw(receiver_reg, oopDesc::klass_offset_in_bytes(), temp1, EXCEPTION_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 __ ld(R19_method, NONZERO(java_lang_invoke_MemberName::vmtarget_offset_in_bytes()), member_reg);
366 break;
367
368 case vmIntrinsics::_linkToStatic:
369 if (VerifyMethodHandles) {
370 verify_ref_kind(_masm, JVM_REF_invokeStatic, member_reg, temp2);
371 }
372 __ ld(R19_method, NONZERO(java_lang_invoke_MemberName::vmtarget_offset_in_bytes()), member_reg);
373 break;
374
375 case vmIntrinsics::_linkToVirtual:
376 {
377 // same as TemplateTable::invokevirtual,
378 // minus the CP setup and profiling:
379
380 if (VerifyMethodHandles) {
381 verify_ref_kind(_masm, JVM_REF_invokeVirtual, member_reg, temp2);
382 }
383
384 // pick out the vtable index from the MemberName, and then we can discard it:
385 Register temp2_index = temp2;
386 __ ld(temp2_index, NONZERO(java_lang_invoke_MemberName::vmindex_offset_in_bytes()), member_reg);
387
388 if (VerifyMethodHandles) {
389 Label L_index_ok;
390 __ cmpdi(CCR1, temp2_index, 0);
391 __ bge(CCR1, L_index_ok);
392 __ stop("no virtual index");
393 __ BIND(L_index_ok);
394 }
395
396 // Note: The verifier invariants allow us to ignore MemberName.clazz and vmtarget
397 // at this point. And VerifyMethodHandles has already checked clazz, if needed.
398
399 // get target Method* & entry point
400 __ lookup_virtual_method(temp1_recv_klass, temp2_index, R19_method);
401 break;
402 }
403
404 case vmIntrinsics::_linkToInterface:
405 {
406 // same as TemplateTable::invokeinterface
407 // (minus the CP setup and profiling, with different argument motion)
408 if (VerifyMethodHandles) {
409 verify_ref_kind(_masm, JVM_REF_invokeInterface, member_reg, temp2);
410 }
411
412 Register temp2_intf = temp2;
413 __ load_heap_oop_not_null(temp2_intf, NONZERO(java_lang_invoke_MemberName::clazz_offset_in_bytes()), member_reg, temp3);
414 load_klass_from_Class(_masm, temp2_intf, temp3, temp4);
415 __ verify_klass_ptr(temp2_intf);
416
417 Register vtable_index = R19_method;
418 __ ld(vtable_index, NONZERO(java_lang_invoke_MemberName::vmindex_offset_in_bytes()), member_reg);
419 if (VerifyMethodHandles) {
420 Label L_index_ok;
421 __ cmpdi(CCR1, vtable_index, 0);
422 __ bge(CCR1, L_index_ok);
423 __ stop("invalid vtable index for MH.invokeInterface");
424 __ BIND(L_index_ok);
425 }
426
427 // given intf, index, and recv klass, dispatch to the implementation method
428 __ lookup_interface_method(temp1_recv_klass, temp2_intf,
429 // note: next two args must be the same:
430 vtable_index, R19_method,
431 temp3, temp4,
432 L_incompatible_class_change_error);
433 break;
434 }
435
436 default:
437 fatal(err_msg_res("unexpected intrinsic %d: %s", iid, vmIntrinsics::name_at(iid)));
438 break;
439 }
440
441 // Live at this point:
442 // R19_method
443 // O5_savedSP (if interpreted)
444
445 // After figuring out which concrete method to call, jump into it.
446 // Note that this works in the interpreter with no data motion.
447 // But the compiled version will require that rcx_recv be shifted out.
448 __ verify_method_ptr(R19_method);
449 jump_from_method_handle(_masm, R19_method, temp1, temp2, for_compiler_entry);
450
451 if (iid == vmIntrinsics::_linkToInterface) {
452 __ BIND(L_incompatible_class_change_error);
453 __ load_const_optimized(temp1, StubRoutines::throw_IncompatibleClassChangeError_entry());
454 __ mtctr(temp1);
455 __ bctr();
456 }
457 }
458 }
459
460 #ifndef PRODUCT
461 void trace_method_handle_stub(const char* adaptername,
462 oopDesc* mh,
463 intptr_t* entry_sp,
464 intptr_t* saved_regs) {
465
466 bool has_mh = (strstr(adaptername, "/static") == NULL &&
467 strstr(adaptername, "linkTo") == NULL); // static linkers don't have MH
468 const char* mh_reg_name = has_mh ? "R23_method_handle" : "G23";
469 tty->print_cr("MH %s %s=" INTPTR_FORMAT " sp=" INTPTR_FORMAT,
470 adaptername, mh_reg_name, p2i(mh), p2i(entry_sp));
471
472 if (Verbose) {
473 tty->print_cr("Registers:");
474 const int abi_offset = frame::abi_reg_args_size / 8;
475 for (int i = R3->encoding(); i <= R12->encoding(); i++) {
476 Register r = as_Register(i);
477 int count = i - R3->encoding();
478 // The registers are stored in reverse order on the stack (by save_volatile_gprs(R1_SP, abi_reg_args_size)).
479 tty->print("%3s=" PTR_FORMAT, r->name(), saved_regs[abi_offset + count]);
480 if ((count + 1) % 4 == 0) {
481 tty->cr();
482 } else {
483 tty->print(", ");
484 }
485 }
486 tty->cr();
487
488 {
489 // dumping last frame with frame::describe
490
491 JavaThread* p = JavaThread::active();
492
493 ResourceMark rm;
494 PRESERVE_EXCEPTION_MARK; // may not be needed by safer and unexpensive here
495 FrameValues values;
496
497 // Note: We want to allow trace_method_handle from any call site.
498 // While trace_method_handle creates a frame, it may be entered
499 // without a PC on the stack top (e.g. not just after a call).
500 // Walking that frame could lead to failures due to that invalid PC.
501 // => carefully detect that frame when doing the stack walking
502
503 // Current C frame
504 frame cur_frame = os::current_frame();
505
506 // Robust search of trace_calling_frame (independant of inlining).
507 // Assumes saved_regs comes from a pusha in the trace_calling_frame.
508 assert(cur_frame.sp() < saved_regs, "registers not saved on stack ?");
509 frame trace_calling_frame = os::get_sender_for_C_frame(&cur_frame);
510 while (trace_calling_frame.fp() < saved_regs) {
511 trace_calling_frame = os::get_sender_for_C_frame(&trace_calling_frame);
512 }
513
514 // Safely create a frame and call frame::describe.
515 intptr_t *dump_sp = trace_calling_frame.sender_sp();
516
517 frame dump_frame = frame(dump_sp);
518 dump_frame.describe(values, 1);
519
520 values.describe(-1, saved_regs, "raw top of stack");
521
522 tty->print_cr("Stack layout:");
523 values.print(p);
524 }
525
526 if (has_mh && mh->is_oop()) {
527 mh->print();
528 if (java_lang_invoke_MethodHandle::is_instance(mh)) {
529 if (java_lang_invoke_MethodHandle::form_offset_in_bytes() != 0)
530 java_lang_invoke_MethodHandle::form(mh)->print();
531 }
532 }
533 }
534 }
535
536 void MethodHandles::trace_method_handle(MacroAssembler* _masm, const char* adaptername) {
537 if (!TraceMethodHandles) return;
538
539 BLOCK_COMMENT("trace_method_handle {");
540
541 const Register tmp = R11; // Will be preserved.
542 const int nbytes_save = 11*8; // volatile gprs except R0
543 __ save_volatile_gprs(R1_SP, -nbytes_save); // except R0
544 __ save_LR_CR(tmp); // save in old frame
545
546 __ mr(R5_ARG3, R1_SP); // saved_sp
547 __ push_frame_reg_args(nbytes_save, tmp);
548
549 __ load_const_optimized(R3_ARG1, (address)adaptername, tmp);
550 __ mr(R4_ARG2, R23_method_handle);
551 __ mr(R6_ARG4, R1_SP);
552 __ call_VM_leaf(CAST_FROM_FN_PTR(address, trace_method_handle_stub));
553
554 __ pop_frame();
555 __ restore_LR_CR(tmp);
556 __ restore_volatile_gprs(R1_SP, -nbytes_save); // except R0
557
558 BLOCK_COMMENT("} trace_method_handle");
559 }
560 #endif // PRODUCT