1 /*
2 * Copyright (c) 2008, 2017, Oracle and/or its affiliates. All rights reserved.
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 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 // This file mirror as much as possible methodHandles_x86.cpp to ease
26 // cross platform development for JSR292.
27 // Last synchronization: changeset f8c9417e3571
28
29 #include "precompiled.hpp"
30 #include "classfile/javaClasses.inline.hpp"
31 #include "interpreter/interpreter.hpp"
32 #include "interpreter/interpreterRuntime.hpp"
33 #include "memory/allocation.inline.hpp"
34 #include "memory/resourceArea.hpp"
35 #include "prims/methodHandles.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 void MethodHandles::load_klass_from_Class(MacroAssembler* _masm, Register klass_reg, Register temp1, Register temp2) {
48 if (VerifyMethodHandles) {
49 verify_klass(_masm, klass_reg, temp1, temp2, SystemDictionary::WK_KLASS_ENUM_NAME(java_lang_Class),
50 "MH argument is a Class");
51 }
52 __ ldr(klass_reg, Address(klass_reg, java_lang_Class::klass_offset_in_bytes()));
53 }
54
55 #ifdef ASSERT
56 static int check_nonzero(const char* xname, int x) {
57 assert(x != 0, "%s should be nonzero", xname);
58 return x;
59 }
60 #define NONZERO(x) check_nonzero(#x, x)
61 #else //ASSERT
62 #define NONZERO(x) (x)
63 #endif //ASSERT
64
65 #ifdef ASSERT
66 void MethodHandles::verify_klass(MacroAssembler* _masm,
67 Register obj, Register temp1, Register temp2, SystemDictionary::WKID klass_id,
68 const char* error_message) {
69 InstanceKlass** klass_addr = SystemDictionary::well_known_klass_addr(klass_id);
70 Klass* klass = SystemDictionary::well_known_klass(klass_id);
71 Label L_ok, L_bad;
72 BLOCK_COMMENT("verify_klass {");
73 __ verify_oop(obj);
74 __ cbz(obj, L_bad);
75 __ load_klass(temp1, obj);
76 __ lea(temp2, ExternalAddress((address) klass_addr));
77 __ ldr(temp2, temp2); // the cmpptr on x86 dereferences the AddressLiteral (not lea)
78 __ cmp(temp1, temp2);
79 __ b(L_ok, eq);
80 intptr_t super_check_offset = klass->super_check_offset();
81 __ ldr(temp1, Address(temp1, super_check_offset));
82 __ cmp(temp1, temp2);
83 __ b(L_ok, eq);
84
85 __ bind(L_bad);
86 __ stop(error_message);
87 __ BIND(L_ok);
88 BLOCK_COMMENT("} verify_klass");
89 }
90
91 void MethodHandles::verify_ref_kind(MacroAssembler* _masm, int ref_kind, Register member_reg, Register temp) {
92 Label L;
93 BLOCK_COMMENT("verify_ref_kind {");
94 __ ldr_u32(temp, Address(member_reg, NONZERO(java_lang_invoke_MemberName::flags_offset_in_bytes())));
95 __ logical_shift_right(temp, temp, java_lang_invoke_MemberName::MN_REFERENCE_KIND_SHIFT);
96 __ andr(temp, temp, (unsigned)java_lang_invoke_MemberName::MN_REFERENCE_KIND_MASK);
97 __ cmp(temp, ref_kind);
98 __ b(L, eq);
99 { char* buf = NEW_C_HEAP_ARRAY(char, 100, mtInternal);
100 jio_snprintf(buf, 100, "verify_ref_kind expected %x", ref_kind);
101 if (ref_kind == JVM_REF_invokeVirtual ||
102 ref_kind == JVM_REF_invokeSpecial)
103 // could do this for all ref_kinds, but would explode assembly code size
104 trace_method_handle(_masm, buf);
105 __ stop(buf);
106 }
107 BLOCK_COMMENT("} verify_ref_kind");
108 __ bind(L);
109 }
110
111 #endif //ASSERT
112
113 void MethodHandles::jump_from_method_handle(MacroAssembler* _masm, bool for_compiler_entry) {
114 Label L_no_such_method;
115 __ cbz(Rmethod, L_no_such_method);
116
117 // Note: JVMTI overhead seems small enough compared to invocation
118 // cost and is not worth the complexity or code size overhead of
119 // supporting several variants of each adapter.
120 if (!for_compiler_entry && (JvmtiExport::can_post_interpreter_events())) {
121 // JVMTI events, such as single-stepping, are implemented partly by avoiding running
122 // compiled code in threads for which the event is enabled. Check here for
123 // interp_only_mode if these events CAN be enabled.
124 __ ldr_s32(Rtemp, Address(Rthread, JavaThread::interp_only_mode_offset()));
125 #ifdef AARCH64
126 Label L;
127 __ cbz(Rtemp, L);
128 __ indirect_jump(Address(Rmethod, Method::interpreter_entry_offset()), Rtemp);
129 __ bind(L);
130 #else
131 __ cmp(Rtemp, 0);
132 __ ldr(PC, Address(Rmethod, Method::interpreter_entry_offset()), ne);
133 #endif // AARCH64
134 }
135 const ByteSize entry_offset = for_compiler_entry ? Method::from_compiled_offset() :
136 Method::from_interpreted_offset();
137
138 __ indirect_jump(Address(Rmethod, entry_offset), Rtemp);
139
140 __ bind(L_no_such_method);
141 // throw exception
142 __ jump(StubRoutines::throw_AbstractMethodError_entry(), relocInfo::runtime_call_type, Rtemp);
143 }
144
145 void MethodHandles::jump_to_lambda_form(MacroAssembler* _masm,
146 Register recv, Register tmp,
147 bool for_compiler_entry) {
148 BLOCK_COMMENT("jump_to_lambda_form {");
149 // This is the initial entry point of a lazy method handle.
150 // After type checking, it picks up the invoker from the LambdaForm.
151 assert_different_registers(recv, tmp, Rmethod);
152
153 // Load the invoker, as MH -> MH.form -> LF.vmentry
154 __ load_heap_oop(tmp, Address(recv, NONZERO(java_lang_invoke_MethodHandle::form_offset_in_bytes())));
155 __ verify_oop(tmp);
156
157 __ load_heap_oop(tmp, Address(tmp, NONZERO(java_lang_invoke_LambdaForm::vmentry_offset_in_bytes())));
158 __ verify_oop(tmp);
159
160 __ load_heap_oop(Rmethod, Address(tmp, NONZERO(java_lang_invoke_MemberName::method_offset_in_bytes())));
161 __ verify_oop(Rmethod);
162 __ ldr(Rmethod, Address(Rmethod, NONZERO(java_lang_invoke_ResolvedMethodName::vmtarget_offset_in_bytes())));
163
164 if (VerifyMethodHandles && !for_compiler_entry) {
165 // make sure recv is already on stack
166 __ ldr(tmp, Address(Rmethod, Method::const_offset()));
167 __ load_sized_value(tmp,
168 Address(tmp, ConstMethod::size_of_parameters_offset()),
169 sizeof(u2), /*is_signed*/ false);
170 // assert(sizeof(u2) == sizeof(Method::_size_of_parameters), "");
171 Label L;
172 __ ldr(tmp, __ receiver_argument_address(Rparams, tmp, tmp));
173 __ cmp(tmp, recv);
174 __ b(L, eq);
175 __ stop("receiver not on stack");
176 __ bind(L);
177 }
178
179 jump_from_method_handle(_masm, for_compiler_entry);
180 BLOCK_COMMENT("} jump_to_lambda_form");
181 }
182
183
184 // Code generation
185 address MethodHandles::generate_method_handle_interpreter_entry(MacroAssembler* _masm,
186 vmIntrinsics::ID iid) {
187 const bool not_for_compiler_entry = false; // this is the interpreter entry
188 assert(is_signature_polymorphic(iid), "expected invoke iid");
189 if (iid == vmIntrinsics::_invokeGeneric ||
190 iid == vmIntrinsics::_compiledLambdaForm) {
191 // Perhaps surprisingly, the user-visible names, and linkToCallSite, are not directly used.
192 // They are linked to Java-generated adapters via MethodHandleNatives.linkMethod.
193 // They all require an extra argument.
194 __ should_not_reach_here(); // empty stubs make SG sick
195 return NULL;
196 }
197
198 // Rmethod: Method*
199 // Rparams (SP on 32-bit ARM): pointer to parameters
200 // Rsender_sp (R4/R19): sender SP (must preserve; see prepare_to_jump_from_interpreted)
201 // R5_mh: receiver method handle (must load from sp[MethodTypeForm.vmslots])
202 // R1, R2, Rtemp: garbage temp, blown away
203
204 // Use same name as x86 to ease future merges
205 Register rdx_temp = R2_tmp;
206 Register rdx_param_size = rdx_temp; // size of parameters
207 Register rax_temp = R1_tmp;
208 Register rcx_mh = R5_mh; // MH receiver; dies quickly and is recycled
209 Register rbx_method = Rmethod; // eventual target of this invocation
210 Register rdi_temp = Rtemp;
211
212 // here's where control starts out:
213 __ align(CodeEntryAlignment);
214 address entry_point = __ pc();
215
216 if (VerifyMethodHandles) {
217 Label L;
218 BLOCK_COMMENT("verify_intrinsic_id {");
219 __ ldrh(rdi_temp, Address(rbx_method, Method::intrinsic_id_offset_in_bytes()));
220 __ sub_slow(rdi_temp, rdi_temp, (int) iid);
221 __ cbz(rdi_temp, L);
222 if (iid == vmIntrinsics::_linkToVirtual ||
223 iid == vmIntrinsics::_linkToSpecial) {
224 // could do this for all kinds, but would explode assembly code size
225 trace_method_handle(_masm, "bad Method*::intrinsic_id");
226 }
227 __ stop("bad Method*::intrinsic_id");
228 __ bind(L);
229 BLOCK_COMMENT("} verify_intrinsic_id");
230 }
231
232 // First task: Find out how big the argument list is.
233 Address rdx_first_arg_addr;
234 int ref_kind = signature_polymorphic_intrinsic_ref_kind(iid);
235 assert(ref_kind != 0 || iid == vmIntrinsics::_invokeBasic, "must be _invokeBasic or a linkTo intrinsic");
236 if (ref_kind == 0 || MethodHandles::ref_kind_has_receiver(ref_kind)) {
237 __ ldr(rdx_param_size, Address(rbx_method, Method::const_offset()));
238 __ load_sized_value(rdx_param_size,
239 Address(rdx_param_size, ConstMethod::size_of_parameters_offset()),
240 sizeof(u2), /*is_signed*/ false);
241 // assert(sizeof(u2) == sizeof(Method::_size_of_parameters), "");
242 rdx_first_arg_addr = __ receiver_argument_address(Rparams, rdx_param_size, rdi_temp);
243 } else {
244 DEBUG_ONLY(rdx_param_size = noreg);
245 }
246
247 if (!is_signature_polymorphic_static(iid)) {
248 __ ldr(rcx_mh, rdx_first_arg_addr);
249 DEBUG_ONLY(rdx_param_size = noreg);
250 }
251
252 // rdx_first_arg_addr is live!
253
254 trace_method_handle_interpreter_entry(_masm, iid);
255
256 if (iid == vmIntrinsics::_invokeBasic) {
257 generate_method_handle_dispatch(_masm, iid, rcx_mh, noreg, not_for_compiler_entry);
258
259 } else {
260 // Adjust argument list by popping the trailing MemberName argument.
261 Register rcx_recv = noreg;
262 if (MethodHandles::ref_kind_has_receiver(ref_kind)) {
263 // Load the receiver (not the MH; the actual MemberName's receiver) up from the interpreter stack.
264 __ ldr(rcx_recv = rcx_mh, rdx_first_arg_addr);
265 DEBUG_ONLY(rdx_param_size = noreg);
266 }
267 Register rbx_member = rbx_method; // MemberName ptr; incoming method ptr is dead now
268 #ifdef AARCH64
269 __ ldr(rbx_member, Address(Rparams, Interpreter::stackElementSize, post_indexed));
270 #else
271 __ pop(rbx_member);
272 #endif
273 generate_method_handle_dispatch(_masm, iid, rcx_recv, rbx_member, not_for_compiler_entry);
274 }
275 return entry_point;
276 }
277
278 void MethodHandles::generate_method_handle_dispatch(MacroAssembler* _masm,
279 vmIntrinsics::ID iid,
280 Register receiver_reg,
281 Register member_reg,
282 bool for_compiler_entry) {
283 assert(is_signature_polymorphic(iid), "expected invoke iid");
284 // Use same name as x86 to ease future merges
285 Register rbx_method = Rmethod; // eventual target of this invocation
286 // temps used in this code are not used in *either* compiled or interpreted calling sequences
287 Register temp1 = (for_compiler_entry ? saved_last_sp_register() : R1_tmp);
288 Register temp2 = AARCH64_ONLY(R9) NOT_AARCH64(R8);
289 Register temp3 = Rtemp; // R12/R16
290 Register temp4 = AARCH64_ONLY(Rtemp2) NOT_AARCH64(R5);
291 if (for_compiler_entry) {
292 assert(receiver_reg == (iid == vmIntrinsics::_linkToStatic ? noreg : j_rarg0), "only valid assignment");
293 #ifdef AARCH64
294 assert_different_registers(temp1, j_rarg0, j_rarg1, j_rarg2, j_rarg3, j_rarg4, j_rarg5, j_rarg6, j_rarg7);
295 assert_different_registers(temp2, j_rarg0, j_rarg1, j_rarg2, j_rarg3, j_rarg4, j_rarg5, j_rarg6, j_rarg7);
296 assert_different_registers(temp3, j_rarg0, j_rarg1, j_rarg2, j_rarg3, j_rarg4, j_rarg5, j_rarg6, j_rarg7);
297 assert_different_registers(temp4, j_rarg0, j_rarg1, j_rarg2, j_rarg3, j_rarg4, j_rarg5, j_rarg6, j_rarg7);
298 #else
299 assert_different_registers(temp1, j_rarg0, j_rarg1, j_rarg2, j_rarg3);
300 assert_different_registers(temp2, j_rarg0, j_rarg1, j_rarg2, j_rarg3);
301 assert_different_registers(temp3, j_rarg0, j_rarg1, j_rarg2, j_rarg3);
302 assert_different_registers(temp4, j_rarg0, j_rarg1, j_rarg2, j_rarg3);
303 #endif // AARCH64
304 }
305 assert_different_registers(temp1, temp2, temp3, receiver_reg);
306 assert_different_registers(temp1, temp2, temp3, temp4, member_reg);
307 if (!for_compiler_entry)
308 assert_different_registers(temp1, temp2, temp3, temp4, saved_last_sp_register()); // don't trash lastSP
309
310 if (iid == vmIntrinsics::_invokeBasic) {
311 // indirect through MH.form.exactInvoker.vmtarget
312 jump_to_lambda_form(_masm, receiver_reg, temp3, for_compiler_entry);
313
314 } else {
315 // The method is a member invoker used by direct method handles.
316 if (VerifyMethodHandles) {
317 // make sure the trailing argument really is a MemberName (caller responsibility)
318 verify_klass(_masm, member_reg, temp2, temp3, SystemDictionary::WK_KLASS_ENUM_NAME(java_lang_invoke_MemberName),
319 "MemberName required for invokeVirtual etc.");
320 }
321
322 Address member_clazz( member_reg, NONZERO(java_lang_invoke_MemberName::clazz_offset_in_bytes()));
323 Address member_vmindex( member_reg, NONZERO(java_lang_invoke_MemberName::vmindex_offset_in_bytes()));
324 Address member_vmtarget(member_reg, NONZERO(java_lang_invoke_MemberName::method_offset_in_bytes()));
325 Address vmtarget_method(Rmethod, NONZERO(java_lang_invoke_ResolvedMethodName::vmtarget_offset_in_bytes()));
326
327 Register temp1_recv_klass = temp1;
328 if (iid != vmIntrinsics::_linkToStatic) {
329 if (iid == vmIntrinsics::_linkToSpecial) {
330 // Don't actually load the klass; just null-check the receiver.
331 __ null_check(receiver_reg, temp3);
332 } else {
333 // load receiver klass itself
334 __ null_check(receiver_reg, temp3, oopDesc::klass_offset_in_bytes());
335 __ load_klass(temp1_recv_klass, receiver_reg);
336 __ verify_klass_ptr(temp1_recv_klass);
337 }
338 BLOCK_COMMENT("check_receiver {");
339 // The receiver for the MemberName must be in receiver_reg.
340 // Check the receiver against the MemberName.clazz
341 if (VerifyMethodHandles && iid == vmIntrinsics::_linkToSpecial) {
342 // Did not load it above...
343 __ load_klass(temp1_recv_klass, receiver_reg);
344 __ verify_klass_ptr(temp1_recv_klass);
345 }
346 // Check the receiver against the MemberName.clazz
347 if (VerifyMethodHandles && iid != vmIntrinsics::_linkToInterface) {
348 Label L_ok;
349 Register temp2_defc = temp2;
350 __ load_heap_oop(temp2_defc, member_clazz);
351 load_klass_from_Class(_masm, temp2_defc, temp3, temp4);
352 __ verify_klass_ptr(temp2_defc);
353 #ifdef AARCH64
354 // TODO-AARCH64
355 __ b(L_ok);
356 #else
357 __ check_klass_subtype(temp1_recv_klass, temp2_defc, temp3, temp4, noreg, L_ok);
358 #endif
359 // If we get here, the type check failed!
360 __ stop("receiver class disagrees with MemberName.clazz");
361 __ bind(L_ok);
362 }
363 BLOCK_COMMENT("} check_receiver");
364 }
365 if (iid == vmIntrinsics::_linkToSpecial ||
366 iid == vmIntrinsics::_linkToStatic) {
367 DEBUG_ONLY(temp1_recv_klass = noreg); // these guys didn't load the recv_klass
368 }
369
370 // Live registers at this point:
371 // member_reg - MemberName that was the extra argument
372 // temp1_recv_klass - klass of stacked receiver, if needed
373
374 Label L_incompatible_class_change_error;
375 switch (iid) {
376 case vmIntrinsics::_linkToSpecial:
377 if (VerifyMethodHandles) {
378 verify_ref_kind(_masm, JVM_REF_invokeSpecial, member_reg, temp3);
379 }
380 __ load_heap_oop(Rmethod, member_vmtarget);
381 __ ldr(Rmethod, vmtarget_method);
382 break;
383
384 case vmIntrinsics::_linkToStatic:
385 if (VerifyMethodHandles) {
386 verify_ref_kind(_masm, JVM_REF_invokeStatic, member_reg, temp3);
387 }
388 __ load_heap_oop(Rmethod, member_vmtarget);
389 __ ldr(Rmethod, vmtarget_method);
390 break;
391 break;
392
393 case vmIntrinsics::_linkToVirtual:
394 {
395 // same as TemplateTable::invokevirtual,
396 // minus the CP setup and profiling:
397
398 if (VerifyMethodHandles) {
399 verify_ref_kind(_masm, JVM_REF_invokeVirtual, member_reg, temp3);
400 }
401
402 // pick out the vtable index from the MemberName, and then we can discard it:
403 Register temp2_index = temp2;
404 __ ldr(temp2_index, member_vmindex);
405
406 if (VerifyMethodHandles) {
407 Label L_index_ok;
408 __ cmp(temp2_index, 0);
409 __ b(L_index_ok, ge);
410 __ stop("no virtual index");
411 __ bind(L_index_ok);
412 }
413
414 // Note: The verifier invariants allow us to ignore MemberName.clazz and vmtarget
415 // at this point. And VerifyMethodHandles has already checked clazz, if needed.
416
417 // get target Method* & entry point
418 __ lookup_virtual_method(temp1_recv_klass, temp2_index, Rmethod);
419 break;
420 }
421
422 case vmIntrinsics::_linkToInterface:
423 {
424 // same as TemplateTable::invokeinterface
425 // (minus the CP setup and profiling, with different argument motion)
426 if (VerifyMethodHandles) {
427 verify_ref_kind(_masm, JVM_REF_invokeInterface, member_reg, temp3);
428 }
429
430 Register temp3_intf = temp3;
431 __ load_heap_oop(temp3_intf, member_clazz);
432 load_klass_from_Class(_masm, temp3_intf, temp2, temp4);
433 __ verify_klass_ptr(temp3_intf);
434
435 Register rbx_index = rbx_method;
436 __ ldr(rbx_index, member_vmindex);
437 if (VerifyMethodHandles) {
438 Label L;
439 __ cmp(rbx_index, 0);
440 __ b(L, ge);
441 __ stop("invalid vtable index for MH.invokeInterface");
442 __ bind(L);
443 }
444
445 // given intf, index, and recv klass, dispatch to the implementation method
446 Label L_no_such_interface;
447 __ lookup_interface_method(temp1_recv_klass, temp3_intf,
448 // note: next two args must be the same:
449 rbx_index, rbx_method,
450 temp2, temp4,
451 L_incompatible_class_change_error);
452 break;
453 }
454
455 default:
456 fatal("unexpected intrinsic %d: %s", iid, vmIntrinsics::name_at(iid));
457 break;
458 }
459
460 // Live at this point:
461 // Rmethod (target method)
462 // Rsender_sp, Rparams (if interpreted)
463 // register arguments (if compiled)
464
465 // After figuring out which concrete method to call, jump into it.
466 __ verify_method_ptr(Rmethod);
467 jump_from_method_handle(_masm, for_compiler_entry);
468
469 if (iid == vmIntrinsics::_linkToInterface) {
470 __ bind(L_incompatible_class_change_error);
471 __ jump(StubRoutines::throw_IncompatibleClassChangeError_entry(), relocInfo::runtime_call_type, Rtemp);
472 }
473 }
474 }
475
476
477 #ifndef PRODUCT
478 enum {
479 ARG_LIMIT = 255, SLOP = 4,
480 // use this parameter for checking for garbage stack movements:
481 UNREASONABLE_STACK_MOVE = (ARG_LIMIT + SLOP)
482 // the slop defends against false alarms due to fencepost errors
483 };
484
485 #ifdef AARCH64
486 const int trace_mh_nregs = 32; // R0-R30, PC
487 #else
488 const int trace_mh_nregs = 15;
489 const Register trace_mh_regs[trace_mh_nregs] =
490 {R0, R1, R2, R3, R4, R5, R6, R7, R8, R9, R10, R11, R12, LR, PC};
491 #endif // AARCH64
492
493 void trace_method_handle_stub(const char* adaptername,
494 intptr_t* saved_regs,
495 intptr_t* saved_bp,
496 oop mh) {
497 // called as a leaf from native code: do not block the JVM!
498 bool has_mh = (strstr(adaptername, "/static") == NULL &&
499 strstr(adaptername, "linkTo") == NULL); // static linkers don't have MH
500 intptr_t* entry_sp = (intptr_t*) &saved_regs[trace_mh_nregs]; // just after the saved regs
501 intptr_t* saved_sp = (intptr_t*) saved_regs[Rsender_sp->encoding()]; // save of Rsender_sp
502 intptr_t* last_sp = (intptr_t*) saved_bp[AARCH64_ONLY(frame::interpreter_frame_stack_top_offset) NOT_AARCH64(frame::interpreter_frame_last_sp_offset)];
503 intptr_t* base_sp = last_sp;
504
505 intptr_t mh_reg = (intptr_t)saved_regs[R5_mh->encoding()];
506 const char* mh_reg_name = "R5_mh";
507 if (!has_mh) mh_reg_name = "R5";
508 tty->print_cr("MH %s %s=" PTR_FORMAT " sp=(" PTR_FORMAT "+" INTX_FORMAT ") stack_size=" INTX_FORMAT " bp=" PTR_FORMAT,
509 adaptername, mh_reg_name, mh_reg,
510 (intptr_t)entry_sp, (intptr_t)saved_sp - (intptr_t)entry_sp, (intptr_t)(base_sp - last_sp), (intptr_t)saved_bp);
511
512 if (last_sp != saved_sp && last_sp != NULL)
513 tty->print_cr("*** last_sp=" INTPTR_FORMAT, p2i(last_sp));
514 if (Verbose) {
515 tty->print(" reg dump: ");
516 int i;
517 for (i = 0; i < trace_mh_nregs; i++) {
518 if (i > 0 && i % AARCH64_ONLY(2) NOT_AARCH64(4) == 0)
519 tty->print("\n + dump: ");
520 #ifdef AARCH64
521 const char* reg_name = (i == trace_mh_nregs-1) ? "pc" : as_Register(i)->name();
522 #else
523 const char* reg_name = trace_mh_regs[i]->name();
524 #endif
525 tty->print(" %s: " INTPTR_FORMAT, reg_name, p2i((void *)saved_regs[i]));
526 }
527 tty->cr();
528 }
529
530 if (Verbose) {
531 // dump last frame (from JavaThread::print_frame_layout)
532
533 // Note: code is robust but the dumped informationm may not be
534 // 100% correct, particularly with respect to the dumped
535 // "unextended_sp". Getting it right for all trace_method_handle
536 // call paths is not worth the complexity/risk. The correct slot
537 // will be identified by *Rsender_sp anyway in the dump.
538 JavaThread* p = JavaThread::active();
539
540 ResourceMark rm;
541 PRESERVE_EXCEPTION_MARK;
542 FrameValues values;
543
544 intptr_t* dump_fp = (intptr_t *) saved_bp;
545 address dump_pc = (address) saved_regs[trace_mh_nregs-2]; // LR (with LR,PC last in saved_regs)
546 frame dump_frame((intptr_t *)entry_sp, dump_fp, dump_pc);
547
548 dump_frame.describe(values, 1);
549 // mark Rsender_sp if seems valid
550 if (has_mh) {
551 if ((saved_sp >= entry_sp - UNREASONABLE_STACK_MOVE) && (saved_sp < dump_fp)) {
552 values.describe(-1, saved_sp, "*Rsender_sp");
553 }
554 }
555
556 // Note: the unextended_sp may not be correct
557 tty->print_cr(" stack layout:");
558 values.print(p);
559 }
560 if (Verbose) {
561 if (has_mh && mh->is_oop()) {
562 mh->print();
563 if (java_lang_invoke_MethodHandle::is_instance(mh)) {
564 if (java_lang_invoke_MethodHandle::form_offset_in_bytes() != 0)
565 java_lang_invoke_MethodHandle::form(mh)->print();
566 }
567 }
568 }
569 }
570
571 void MethodHandles::trace_method_handle(MacroAssembler* _masm, const char* adaptername) {
572 if (!TraceMethodHandles) return;
573 BLOCK_COMMENT("trace_method_handle {");
574 // register saving
575 // must correspond to trace_mh_nregs and trace_mh_regs defined above
576 int push_size = __ save_all_registers();
577 assert(trace_mh_nregs*wordSize == push_size,"saved register count mismatch");
578
579 __ mov_slow(R0, adaptername);
580 __ mov(R1, SP); // entry_sp (after pushes)
581 __ mov(R2, FP);
582 if (R5_mh != R3) {
583 assert_different_registers(R0, R1, R2, R5_mh);
584 __ mov(R3, R5_mh);
585 }
586
587 __ call_VM_leaf(CAST_FROM_FN_PTR(address, trace_method_handle_stub), R0, R1, R2, R3);
588
589 __ restore_all_registers();
590 BLOCK_COMMENT("} trace_method_handle");
591 }
592 #endif //PRODUCT