1 /*
2 * Copyright (c) 1997, 2018, Oracle and/or its affiliates. All rights reserved.
3 * Copyright (c) 2012, 2017 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 "jvm.h"
28 #include "asm/macroAssembler.inline.hpp"
29 #include "classfile/javaClasses.inline.hpp"
30 #include "interpreter/interpreter.hpp"
31 #include "memory/allocation.inline.hpp"
32 #include "memory/resourceArea.hpp"
33 #include "prims/methodHandles.hpp"
34 #include "runtime/frame.inline.hpp"
35 #include "utilities/preserveException.hpp"
36
37 #define __ _masm->
38
39 #ifdef PRODUCT
40 #define BLOCK_COMMENT(str) // nothing
41 #else
42 #define BLOCK_COMMENT(str) __ block_comment(str)
43 #endif
44
45 #define BIND(label) bind(label); BLOCK_COMMENT(#label ":")
46
47 // Workaround for C++ overloading nastiness on '0' for RegisterOrConstant.
48 inline static RegisterOrConstant constant(int value) {
49 return RegisterOrConstant(value);
50 }
51
52 void MethodHandles::load_klass_from_Class(MacroAssembler* _masm, Register klass_reg,
53 Register temp_reg, Register temp2_reg) {
54 if (VerifyMethodHandles) {
55 verify_klass(_masm, klass_reg, SystemDictionary::WK_KLASS_ENUM_NAME(java_lang_Class),
56 temp_reg, temp2_reg, "MH argument is a Class");
57 }
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, "%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 InstanceKlass** klass_addr = SystemDictionary::well_known_klass_addr(klass_id);
77 Klass* klass = SystemDictionary::well_known_klass(klass_id);
78 Label L_ok, L_bad;
79 BLOCK_COMMENT("verify_klass {");
80 __ verify_oop(obj_reg, FILE_AND_LINE);
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, FILE_AND_LINE);
176 __ load_heap_oop(method_temp, NONZERO(java_lang_invoke_MethodHandle::form_offset_in_bytes()), recv,
177 temp2, noreg, false, IS_NOT_NULL);
178 __ verify_oop(method_temp, FILE_AND_LINE);
179 __ load_heap_oop(method_temp, NONZERO(java_lang_invoke_LambdaForm::vmentry_offset_in_bytes()), method_temp,
180 temp2, noreg, false, IS_NOT_NULL);
181 __ verify_oop(method_temp, FILE_AND_LINE);
182 __ load_heap_oop(method_temp, NONZERO(java_lang_invoke_MemberName::method_offset_in_bytes()), method_temp,
183 temp2, noreg, false, IS_NOT_NULL);
184 __ verify_oop(method_temp, FILE_AND_LINE);
185 __ ld(method_temp, NONZERO(java_lang_invoke_ResolvedMethodName::vmtarget_offset_in_bytes()), method_temp);
186
187 if (VerifyMethodHandles && !for_compiler_entry) {
188 // Make sure recv is already on stack.
189 __ ld(temp2, in_bytes(Method::const_offset()), method_temp);
190 __ load_sized_value(temp2, in_bytes(ConstMethod::size_of_parameters_offset()), temp2,
191 sizeof(u2), /*is_signed*/ false);
192 // assert(sizeof(u2) == sizeof(ConstMethod::_size_of_parameters), "");
193 Label L;
194 __ ld(temp2, __ argument_offset(temp2, temp2, 0), R15_esp);
195 __ cmpd(CCR1, temp2, recv);
196 __ beq(CCR1, L);
197 __ stop("receiver not on stack");
198 __ BIND(L);
199 }
200
201 jump_from_method_handle(_masm, method_temp, temp2, temp3, for_compiler_entry);
202 BLOCK_COMMENT("} jump_to_lambda_form");
203 }
204
205
206
207 // Code generation
208 address MethodHandles::generate_method_handle_interpreter_entry(MacroAssembler* _masm,
209 vmIntrinsics::ID iid) {
210 const bool not_for_compiler_entry = false; // this is the interpreter entry
211 assert(is_signature_polymorphic(iid), "expected invoke iid");
212 if (iid == vmIntrinsics::_invokeGeneric ||
213 iid == vmIntrinsics::_compiledLambdaForm) {
214 // Perhaps surprisingly, the symbolic references visible to Java are not directly used.
215 // They are linked to Java-generated adapters via MethodHandleNatives.linkMethod.
216 // They all allow an appendix argument.
217 __ stop("Should not reach here"); // empty stubs make SG sick
218 return NULL;
219 }
220
221 Register argbase = R15_esp; // parameter (preserved)
222 Register argslot = R3;
223 Register temp1 = R6;
224 Register param_size = R7;
225
226 // here's where control starts out:
227 __ align(CodeEntryAlignment);
228 address entry_point = __ pc();
229
230 if (VerifyMethodHandles) {
231 assert(Method::intrinsic_id_size_in_bytes() == 2, "assuming Method::_intrinsic_id is u2");
232
233 Label L;
234 BLOCK_COMMENT("verify_intrinsic_id {");
235 __ load_sized_value(temp1, Method::intrinsic_id_offset_in_bytes(), R19_method,
236 sizeof(u2), /*is_signed*/ false);
237 __ cmpwi(CCR1, temp1, (int) iid);
238 __ beq(CCR1, L);
239 if (iid == vmIntrinsics::_linkToVirtual ||
240 iid == vmIntrinsics::_linkToSpecial) {
241 // could do this for all kinds, but would explode assembly code size
242 trace_method_handle(_masm, "bad Method*:intrinsic_id");
243 }
244 __ stop("bad Method*::intrinsic_id");
245 __ BIND(L);
246 BLOCK_COMMENT("} verify_intrinsic_id");
247 }
248
249 // First task: Find out how big the argument list is.
250 int ref_kind = signature_polymorphic_intrinsic_ref_kind(iid);
251 assert(ref_kind != 0 || iid == vmIntrinsics::_invokeBasic, "must be _invokeBasic or a linkTo intrinsic");
252 if (ref_kind == 0 || MethodHandles::ref_kind_has_receiver(ref_kind)) {
253 __ ld(param_size, in_bytes(Method::const_offset()), R19_method);
254 __ load_sized_value(param_size, in_bytes(ConstMethod::size_of_parameters_offset()), param_size,
255 sizeof(u2), /*is_signed*/ false);
256 // assert(sizeof(u2) == sizeof(ConstMethod::_size_of_parameters), "");
257 } else {
258 DEBUG_ONLY(param_size = noreg);
259 }
260
261 Register tmp_mh = noreg;
262 if (!is_signature_polymorphic_static(iid)) {
263 __ ld(tmp_mh = temp1, __ argument_offset(param_size, param_size, 0), argbase);
264 DEBUG_ONLY(param_size = noreg);
265 }
266
267 if (TraceMethodHandles) {
268 if (tmp_mh != noreg) {
269 __ mr(R23_method_handle, tmp_mh); // make stub happy
270 }
271 trace_method_handle_interpreter_entry(_masm, iid);
272 }
273
274 if (iid == vmIntrinsics::_invokeBasic) {
275 generate_method_handle_dispatch(_masm, iid, tmp_mh, noreg, not_for_compiler_entry);
276
277 } else {
278 // Adjust argument list by popping the trailing MemberName argument.
279 Register tmp_recv = noreg;
280 if (MethodHandles::ref_kind_has_receiver(ref_kind)) {
281 // Load the receiver (not the MH; the actual MemberName's receiver) up from the interpreter stack.
282 __ ld(tmp_recv = temp1, __ argument_offset(param_size, param_size, 0), argbase);
283 DEBUG_ONLY(param_size = noreg);
284 }
285 Register R19_member = R19_method; // MemberName ptr; incoming method ptr is dead now
286 __ ld(R19_member, RegisterOrConstant((intptr_t)8), argbase);
287 __ add(argbase, Interpreter::stackElementSize, argbase);
288 generate_method_handle_dispatch(_masm, iid, tmp_recv, R19_member, not_for_compiler_entry);
289 }
290
291 return entry_point;
292 }
293
294 void MethodHandles::generate_method_handle_dispatch(MacroAssembler* _masm,
295 vmIntrinsics::ID iid,
296 Register receiver_reg,
297 Register member_reg,
298 bool for_compiler_entry) {
299 assert(is_signature_polymorphic(iid), "expected invoke iid");
300 Register temp1 = (for_compiler_entry ? R25_tmp5 : R7);
301 Register temp2 = (for_compiler_entry ? R22_tmp2 : R8);
302 Register temp3 = (for_compiler_entry ? R23_tmp3 : R9);
303 Register temp4 = (for_compiler_entry ? R24_tmp4 : R10);
304 if (receiver_reg != noreg) assert_different_registers(temp1, temp2, temp3, temp4, receiver_reg);
305 if (member_reg != noreg) assert_different_registers(temp1, temp2, temp3, temp4, member_reg);
306
307 if (iid == vmIntrinsics::_invokeBasic) {
308 // indirect through MH.form.vmentry.vmtarget
309 jump_to_lambda_form(_masm, receiver_reg, R19_method, temp1, temp2, for_compiler_entry);
310 } else {
311 // The method is a member invoker used by direct method handles.
312 if (VerifyMethodHandles) {
313 // make sure the trailing argument really is a MemberName (caller responsibility)
314 verify_klass(_masm, member_reg, SystemDictionary::WK_KLASS_ENUM_NAME(MemberName_klass),
315 temp1, temp2,
316 "MemberName required for invokeVirtual etc.");
317 }
318
319 Register temp1_recv_klass = temp1;
320 if (iid != vmIntrinsics::_linkToStatic) {
321 __ verify_oop(receiver_reg, FILE_AND_LINE);
322 if (iid == vmIntrinsics::_linkToSpecial) {
323 // Don't actually load the klass; just null-check the receiver.
324 __ null_check_throw(receiver_reg, -1, temp1,
325 Interpreter::throw_NullPointerException_entry());
326 } else {
327 // load receiver klass itself
328 __ null_check_throw(receiver_reg, oopDesc::klass_offset_in_bytes(), temp1,
329 Interpreter::throw_NullPointerException_entry());
330 __ load_klass(temp1_recv_klass, receiver_reg);
331 __ verify_klass_ptr(temp1_recv_klass);
332 }
333 BLOCK_COMMENT("check_receiver {");
334 // The receiver for the MemberName must be in receiver_reg.
335 // Check the receiver against the MemberName.clazz
336 if (VerifyMethodHandles && iid == vmIntrinsics::_linkToSpecial) {
337 // Did not load it above...
338 __ load_klass(temp1_recv_klass, receiver_reg);
339 __ verify_klass_ptr(temp1_recv_klass);
340 }
341 if (VerifyMethodHandles && iid != vmIntrinsics::_linkToInterface) {
342 Label L_ok;
343 Register temp2_defc = temp2;
344 __ load_heap_oop(temp2_defc, NONZERO(java_lang_invoke_MemberName::clazz_offset_in_bytes()), member_reg,
345 temp3, noreg, false, IS_NOT_NULL);
346 load_klass_from_Class(_masm, temp2_defc, temp3, temp4);
347 __ verify_klass_ptr(temp2_defc);
348 __ check_klass_subtype(temp1_recv_klass, temp2_defc, temp3, temp4, L_ok);
349 // If we get here, the type check failed!
350 __ stop("receiver class disagrees with MemberName.clazz");
351 __ BIND(L_ok);
352 }
353 BLOCK_COMMENT("} check_receiver");
354 }
355 if (iid == vmIntrinsics::_linkToSpecial ||
356 iid == vmIntrinsics::_linkToStatic) {
357 DEBUG_ONLY(temp1_recv_klass = noreg); // these guys didn't load the recv_klass
358 }
359
360 // Live registers at this point:
361 // member_reg - MemberName that was the trailing argument
362 // temp1_recv_klass - klass of stacked receiver, if needed
363 // O5_savedSP - interpreter linkage (if interpreted)
364 // O0..O5 - compiler arguments (if compiled)
365
366 Label L_incompatible_class_change_error;
367 switch (iid) {
368 case vmIntrinsics::_linkToSpecial:
369 if (VerifyMethodHandles) {
370 verify_ref_kind(_masm, JVM_REF_invokeSpecial, member_reg, temp2);
371 }
372 __ load_heap_oop(R19_method, NONZERO(java_lang_invoke_MemberName::method_offset_in_bytes()), member_reg,
373 temp3, noreg, false, IS_NOT_NULL);
374 __ ld(R19_method, NONZERO(java_lang_invoke_ResolvedMethodName::vmtarget_offset_in_bytes()), R19_method);
375 break;
376
377 case vmIntrinsics::_linkToStatic:
378 if (VerifyMethodHandles) {
379 verify_ref_kind(_masm, JVM_REF_invokeStatic, member_reg, temp2);
380 }
381 __ load_heap_oop(R19_method, NONZERO(java_lang_invoke_MemberName::method_offset_in_bytes()), member_reg,
382 temp3, noreg, false, IS_NOT_NULL);
383 __ ld(R19_method, NONZERO(java_lang_invoke_ResolvedMethodName::vmtarget_offset_in_bytes()), R19_method);
384 break;
385
386 case vmIntrinsics::_linkToVirtual:
387 {
388 // same as TemplateTable::invokevirtual,
389 // minus the CP setup and profiling:
390
391 if (VerifyMethodHandles) {
392 verify_ref_kind(_masm, JVM_REF_invokeVirtual, member_reg, temp2);
393 }
394
395 // pick out the vtable index from the MemberName, and then we can discard it:
396 Register temp2_index = temp2;
397 __ ld(temp2_index, NONZERO(java_lang_invoke_MemberName::vmindex_offset_in_bytes()), member_reg);
398
399 if (VerifyMethodHandles) {
400 Label L_index_ok;
401 __ cmpdi(CCR1, temp2_index, 0);
402 __ bge(CCR1, L_index_ok);
403 __ stop("no virtual index");
404 __ BIND(L_index_ok);
405 }
406
407 // Note: The verifier invariants allow us to ignore MemberName.clazz and vmtarget
408 // at this point. And VerifyMethodHandles has already checked clazz, if needed.
409
410 // get target Method* & entry point
411 __ lookup_virtual_method(temp1_recv_klass, temp2_index, R19_method);
412 break;
413 }
414
415 case vmIntrinsics::_linkToInterface:
416 {
417 // same as TemplateTable::invokeinterface
418 // (minus the CP setup and profiling, with different argument motion)
419 if (VerifyMethodHandles) {
420 verify_ref_kind(_masm, JVM_REF_invokeInterface, member_reg, temp2);
421 }
422
423 Register temp2_intf = temp2;
424 __ load_heap_oop(temp2_intf, NONZERO(java_lang_invoke_MemberName::clazz_offset_in_bytes()), member_reg,
425 temp3, noreg, false, IS_NOT_NULL);
426 load_klass_from_Class(_masm, temp2_intf, temp3, temp4);
427 __ verify_klass_ptr(temp2_intf);
428
429 Register vtable_index = R19_method;
430 __ ld(vtable_index, NONZERO(java_lang_invoke_MemberName::vmindex_offset_in_bytes()), member_reg);
431 if (VerifyMethodHandles) {
432 Label L_index_ok;
433 __ cmpdi(CCR1, vtable_index, 0);
434 __ bge(CCR1, L_index_ok);
435 __ stop("invalid vtable index for MH.invokeInterface");
436 __ BIND(L_index_ok);
437 }
438
439 // given intf, index, and recv klass, dispatch to the implementation method
440 __ lookup_interface_method(temp1_recv_klass, temp2_intf,
441 // note: next two args must be the same:
442 vtable_index, R19_method,
443 temp3, temp4,
444 L_incompatible_class_change_error);
445 break;
446 }
447
448 default:
449 fatal("unexpected intrinsic %d: %s", iid, vmIntrinsics::name_at(iid));
450 break;
451 }
452
453 // Live at this point:
454 // R19_method
455 // O5_savedSP (if interpreted)
456
457 // After figuring out which concrete method to call, jump into it.
458 // Note that this works in the interpreter with no data motion.
459 // But the compiled version will require that rcx_recv be shifted out.
460 __ verify_method_ptr(R19_method);
461 jump_from_method_handle(_masm, R19_method, temp1, temp2, for_compiler_entry);
462
463 if (iid == vmIntrinsics::_linkToInterface) {
464 __ BIND(L_incompatible_class_change_error);
465 __ load_const_optimized(temp1, StubRoutines::throw_IncompatibleClassChangeError_entry());
466 __ mtctr(temp1);
467 __ bctr();
468 }
469 }
470 }
471
472 #ifndef PRODUCT
473 void trace_method_handle_stub(const char* adaptername,
474 oopDesc* mh,
475 intptr_t* entry_sp,
476 intptr_t* saved_regs) {
477
478 bool has_mh = (strstr(adaptername, "/static") == NULL &&
479 strstr(adaptername, "linkTo") == NULL); // static linkers don't have MH
480 const char* mh_reg_name = has_mh ? "R23_method_handle" : "G23";
481 tty->print_cr("MH %s %s=" INTPTR_FORMAT " sp=" INTPTR_FORMAT,
482 adaptername, mh_reg_name, p2i(mh), p2i(entry_sp));
483
484 if (Verbose) {
485 tty->print_cr("Registers:");
486 const int abi_offset = frame::abi_reg_args_size / 8;
487 for (int i = R3->encoding(); i <= R12->encoding(); i++) {
488 Register r = as_Register(i);
489 int count = i - R3->encoding();
490 // The registers are stored in reverse order on the stack (by save_volatile_gprs(R1_SP, abi_reg_args_size)).
491 tty->print("%3s=" PTR_FORMAT, r->name(), saved_regs[abi_offset + count]);
492 if ((count + 1) % 4 == 0) {
493 tty->cr();
494 } else {
495 tty->print(", ");
496 }
497 }
498 tty->cr();
499
500 {
501 // dumping last frame with frame::describe
502
503 JavaThread* p = JavaThread::active();
504
505 ResourceMark rm;
506 PRESERVE_EXCEPTION_MARK; // may not be needed by safer and unexpensive here
507 FrameValues values;
508
509 // Note: We want to allow trace_method_handle from any call site.
510 // While trace_method_handle creates a frame, it may be entered
511 // without a PC on the stack top (e.g. not just after a call).
512 // Walking that frame could lead to failures due to that invalid PC.
513 // => carefully detect that frame when doing the stack walking
514
515 // Current C frame
516 frame cur_frame = os::current_frame();
517
518 // Robust search of trace_calling_frame (independant of inlining).
519 assert(cur_frame.sp() <= saved_regs, "registers not saved on stack ?");
520 frame trace_calling_frame = os::get_sender_for_C_frame(&cur_frame);
521 while (trace_calling_frame.fp() < saved_regs) {
522 trace_calling_frame = os::get_sender_for_C_frame(&trace_calling_frame);
523 }
524
525 // Safely create a frame and call frame::describe.
526 intptr_t *dump_sp = trace_calling_frame.sender_sp();
527
528 frame dump_frame = frame(dump_sp);
529 dump_frame.describe(values, 1);
530
531 values.describe(-1, saved_regs, "raw top of stack");
532
533 tty->print_cr("Stack layout:");
534 values.print(p);
535 }
536
537 if (has_mh && oopDesc::is_oop(mh)) {
538 mh->print();
539 if (java_lang_invoke_MethodHandle::is_instance(mh)) {
540 if (java_lang_invoke_MethodHandle::form_offset_in_bytes() != 0)
541 java_lang_invoke_MethodHandle::form(mh)->print();
542 }
543 }
544 }
545 }
546
547 void MethodHandles::trace_method_handle(MacroAssembler* _masm, const char* adaptername) {
548 if (!TraceMethodHandles) return;
549
550 BLOCK_COMMENT("trace_method_handle {");
551
552 const Register tmp = R11; // Will be preserved.
553 const int nbytes_save = MacroAssembler::num_volatile_regs * 8;
554 __ save_volatile_gprs(R1_SP, -nbytes_save); // except R0
555 __ save_LR_CR(tmp); // save in old frame
556
557 __ mr(R5_ARG3, R1_SP); // saved_sp
558 __ push_frame_reg_args(nbytes_save, tmp);
559
560 __ load_const_optimized(R3_ARG1, (address)adaptername, tmp);
561 __ mr(R4_ARG2, R23_method_handle);
562 __ mr(R6_ARG4, R1_SP);
563 __ call_VM_leaf(CAST_FROM_FN_PTR(address, trace_method_handle_stub));
564
565 __ pop_frame();
566 __ restore_LR_CR(tmp);
567 __ restore_volatile_gprs(R1_SP, -nbytes_save); // except R0
568
569 BLOCK_COMMENT("} trace_method_handle");
570 }
571 #endif // PRODUCT