Thu, 26 Sep 2013 10:25:02 -0400
7195622: CheckUnhandledOops has limited usefulness now
Summary: Enable CHECK_UNHANDLED_OOPS in fastdebug builds across all supported platforms.
Reviewed-by: coleenp, hseigel, dholmes, stefank, twisti, ihse, rdurbin
Contributed-by: lois.foltan@oracle.com
jrose@1145 | 1 | /* |
hseigel@5784 | 2 | * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved. |
jrose@1145 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
jrose@1145 | 4 | * |
jrose@1145 | 5 | * This code is free software; you can redistribute it and/or modify it |
jrose@1145 | 6 | * under the terms of the GNU General Public License version 2 only, as |
jrose@1145 | 7 | * published by the Free Software Foundation. |
jrose@1145 | 8 | * |
jrose@1145 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
jrose@1145 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
jrose@1145 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
jrose@1145 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
jrose@1145 | 13 | * accompanied this code). |
jrose@1145 | 14 | * |
jrose@1145 | 15 | * You should have received a copy of the GNU General Public License version |
jrose@1145 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
jrose@1145 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
jrose@1145 | 18 | * |
trims@1907 | 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
trims@1907 | 20 | * or visit www.oracle.com if you need additional information or have any |
trims@1907 | 21 | * questions. |
jrose@1145 | 22 | * |
jrose@1145 | 23 | */ |
jrose@1145 | 24 | |
stefank@2314 | 25 | #include "precompiled.hpp" |
twisti@4318 | 26 | #include "asm/macroAssembler.hpp" |
stefank@2314 | 27 | #include "interpreter/interpreter.hpp" |
jrose@2952 | 28 | #include "interpreter/interpreterRuntime.hpp" |
stefank@2314 | 29 | #include "memory/allocation.inline.hpp" |
stefank@2314 | 30 | #include "prims/methodHandles.hpp" |
jrose@1145 | 31 | |
jrose@1145 | 32 | #define __ _masm-> |
jrose@1145 | 33 | |
jrose@2148 | 34 | #ifdef PRODUCT |
jrose@2148 | 35 | #define BLOCK_COMMENT(str) /* nothing */ |
twisti@3969 | 36 | #define STOP(error) stop(error) |
jrose@2148 | 37 | #else |
jrose@2148 | 38 | #define BLOCK_COMMENT(str) __ block_comment(str) |
twisti@3969 | 39 | #define STOP(error) block_comment(error); __ stop(error) |
jrose@2148 | 40 | #endif |
jrose@2148 | 41 | |
jrose@2148 | 42 | #define BIND(label) bind(label); BLOCK_COMMENT(#label ":") |
jrose@2148 | 43 | |
never@2895 | 44 | void MethodHandles::load_klass_from_Class(MacroAssembler* _masm, Register klass_reg) { |
never@2895 | 45 | if (VerifyMethodHandles) |
coleenp@4037 | 46 | verify_klass(_masm, klass_reg, SystemDictionary::WK_KLASS_ENUM_NAME(java_lang_Class), |
twisti@3969 | 47 | "MH argument is a Class"); |
coleenp@4037 | 48 | __ movptr(klass_reg, Address(klass_reg, java_lang_Class::klass_offset_in_bytes())); |
never@2895 | 49 | } |
never@2895 | 50 | |
twisti@3969 | 51 | #ifdef ASSERT |
twisti@3969 | 52 | static int check_nonzero(const char* xname, int x) { |
twisti@3969 | 53 | assert(x != 0, err_msg("%s should be nonzero", xname)); |
twisti@3969 | 54 | return x; |
never@2895 | 55 | } |
twisti@3969 | 56 | #define NONZERO(x) check_nonzero(#x, x) |
twisti@3969 | 57 | #else //ASSERT |
twisti@3969 | 58 | #define NONZERO(x) (x) |
twisti@3969 | 59 | #endif //ASSERT |
never@2895 | 60 | |
never@2920 | 61 | #ifdef ASSERT |
never@2895 | 62 | void MethodHandles::verify_klass(MacroAssembler* _masm, |
coleenp@4037 | 63 | Register obj, SystemDictionary::WKID klass_id, |
never@2895 | 64 | const char* error_message) { |
coleenp@4037 | 65 | Klass** klass_addr = SystemDictionary::well_known_klass_addr(klass_id); |
coleenp@4037 | 66 | KlassHandle klass = SystemDictionary::well_known_klass(klass_id); |
never@2895 | 67 | Register temp = rdi; |
twisti@3969 | 68 | Register temp2 = noreg; |
twisti@3969 | 69 | LP64_ONLY(temp2 = rscratch1); // used by MacroAssembler::cmpptr |
never@2895 | 70 | Label L_ok, L_bad; |
never@2895 | 71 | BLOCK_COMMENT("verify_klass {"); |
never@2895 | 72 | __ verify_oop(obj); |
never@2895 | 73 | __ testptr(obj, obj); |
never@2895 | 74 | __ jcc(Assembler::zero, L_bad); |
twisti@3969 | 75 | __ push(temp); if (temp2 != noreg) __ push(temp2); |
twisti@3969 | 76 | #define UNPUSH { if (temp2 != noreg) __ pop(temp2); __ pop(temp); } |
never@2895 | 77 | __ load_klass(temp, obj); |
never@2895 | 78 | __ cmpptr(temp, ExternalAddress((address) klass_addr)); |
never@2895 | 79 | __ jcc(Assembler::equal, L_ok); |
never@2895 | 80 | intptr_t super_check_offset = klass->super_check_offset(); |
never@2895 | 81 | __ movptr(temp, Address(temp, super_check_offset)); |
never@2895 | 82 | __ cmpptr(temp, ExternalAddress((address) klass_addr)); |
never@2895 | 83 | __ jcc(Assembler::equal, L_ok); |
twisti@3969 | 84 | UNPUSH; |
never@2895 | 85 | __ bind(L_bad); |
twisti@3969 | 86 | __ STOP(error_message); |
never@2895 | 87 | __ BIND(L_ok); |
twisti@3969 | 88 | UNPUSH; |
never@2895 | 89 | BLOCK_COMMENT("} verify_klass"); |
never@2895 | 90 | } |
twisti@3969 | 91 | |
twisti@3969 | 92 | void MethodHandles::verify_ref_kind(MacroAssembler* _masm, int ref_kind, Register member_reg, Register temp) { |
twisti@3969 | 93 | Label L; |
twisti@3969 | 94 | BLOCK_COMMENT("verify_ref_kind {"); |
twisti@3969 | 95 | __ movl(temp, Address(member_reg, NONZERO(java_lang_invoke_MemberName::flags_offset_in_bytes()))); |
twisti@3969 | 96 | __ shrl(temp, java_lang_invoke_MemberName::MN_REFERENCE_KIND_SHIFT); |
twisti@3969 | 97 | __ andl(temp, java_lang_invoke_MemberName::MN_REFERENCE_KIND_MASK); |
twisti@3969 | 98 | __ cmpl(temp, ref_kind); |
twisti@3969 | 99 | __ jcc(Assembler::equal, L); |
twisti@3969 | 100 | { char* buf = NEW_C_HEAP_ARRAY(char, 100, mtInternal); |
twisti@3969 | 101 | jio_snprintf(buf, 100, "verify_ref_kind expected %x", ref_kind); |
twisti@3969 | 102 | if (ref_kind == JVM_REF_invokeVirtual || |
twisti@3969 | 103 | ref_kind == JVM_REF_invokeSpecial) |
twisti@3969 | 104 | // could do this for all ref_kinds, but would explode assembly code size |
twisti@3969 | 105 | trace_method_handle(_masm, buf); |
twisti@3969 | 106 | __ STOP(buf); |
twisti@3969 | 107 | } |
twisti@3969 | 108 | BLOCK_COMMENT("} verify_ref_kind"); |
twisti@3969 | 109 | __ bind(L); |
twisti@3969 | 110 | } |
twisti@3969 | 111 | |
never@2895 | 112 | #endif //ASSERT |
jrose@1145 | 113 | |
twisti@3969 | 114 | void MethodHandles::jump_from_method_handle(MacroAssembler* _masm, Register method, Register temp, |
twisti@3969 | 115 | bool for_compiler_entry) { |
twisti@3969 | 116 | assert(method == rbx, "interpreter calling convention"); |
coleenp@4052 | 117 | __ verify_method_ptr(method); |
twisti@3969 | 118 | |
twisti@3969 | 119 | if (!for_compiler_entry && JvmtiExport::can_post_interpreter_events()) { |
never@3005 | 120 | Label run_compiled_code; |
never@3005 | 121 | // JVMTI events, such as single-stepping, are implemented partly by avoiding running |
never@3005 | 122 | // compiled code in threads for which the event is enabled. Check here for |
never@3005 | 123 | // interp_only_mode if these events CAN be enabled. |
never@3005 | 124 | #ifdef _LP64 |
never@3005 | 125 | Register rthread = r15_thread; |
never@3005 | 126 | #else |
never@3005 | 127 | Register rthread = temp; |
never@3005 | 128 | __ get_thread(rthread); |
never@3005 | 129 | #endif |
never@3005 | 130 | // interp_only is an int, on little endian it is sufficient to test the byte only |
never@3005 | 131 | // Is a cmpl faster? |
never@3005 | 132 | __ cmpb(Address(rthread, JavaThread::interp_only_mode_offset()), 0); |
never@3005 | 133 | __ jccb(Assembler::zero, run_compiled_code); |
coleenp@4037 | 134 | __ jmp(Address(method, Method::interpreter_entry_offset())); |
twisti@3969 | 135 | __ BIND(run_compiled_code); |
never@3005 | 136 | } |
twisti@3969 | 137 | |
coleenp@4037 | 138 | const ByteSize entry_offset = for_compiler_entry ? Method::from_compiled_offset() : |
coleenp@4037 | 139 | Method::from_interpreted_offset(); |
twisti@3969 | 140 | __ jmp(Address(method, entry_offset)); |
never@3005 | 141 | } |
never@3005 | 142 | |
twisti@3969 | 143 | void MethodHandles::jump_to_lambda_form(MacroAssembler* _masm, |
twisti@3969 | 144 | Register recv, Register method_temp, |
twisti@3969 | 145 | Register temp2, |
twisti@3969 | 146 | bool for_compiler_entry) { |
twisti@3969 | 147 | BLOCK_COMMENT("jump_to_lambda_form {"); |
twisti@3969 | 148 | // This is the initial entry point of a lazy method handle. |
twisti@3969 | 149 | // After type checking, it picks up the invoker from the LambdaForm. |
twisti@3969 | 150 | assert_different_registers(recv, method_temp, temp2); |
twisti@3969 | 151 | assert(recv != noreg, "required register"); |
twisti@3969 | 152 | assert(method_temp == rbx, "required register for loading method"); |
twisti@3969 | 153 | |
twisti@3969 | 154 | //NOT_PRODUCT({ FlagSetting fs(TraceMethodHandles, true); trace_method_handle(_masm, "LZMH"); }); |
twisti@3969 | 155 | |
twisti@3969 | 156 | // Load the invoker, as MH -> MH.form -> LF.vmentry |
twisti@3969 | 157 | __ verify_oop(recv); |
twisti@3969 | 158 | __ load_heap_oop(method_temp, Address(recv, NONZERO(java_lang_invoke_MethodHandle::form_offset_in_bytes()))); |
twisti@3969 | 159 | __ verify_oop(method_temp); |
twisti@3969 | 160 | __ load_heap_oop(method_temp, Address(method_temp, NONZERO(java_lang_invoke_LambdaForm::vmentry_offset_in_bytes()))); |
twisti@3969 | 161 | __ verify_oop(method_temp); |
coleenp@4037 | 162 | // the following assumes that a Method* is normally compressed in the vmtarget field: |
coleenp@4037 | 163 | __ movptr(method_temp, Address(method_temp, NONZERO(java_lang_invoke_MemberName::vmtarget_offset_in_bytes()))); |
twisti@3969 | 164 | |
twisti@3969 | 165 | if (VerifyMethodHandles && !for_compiler_entry) { |
twisti@3969 | 166 | // make sure recv is already on stack |
jiangli@4338 | 167 | __ movptr(temp2, Address(method_temp, Method::const_offset())); |
twisti@3969 | 168 | __ load_sized_value(temp2, |
jiangli@4338 | 169 | Address(temp2, ConstMethod::size_of_parameters_offset()), |
twisti@3969 | 170 | sizeof(u2), /*is_signed*/ false); |
coleenp@4037 | 171 | // assert(sizeof(u2) == sizeof(Method::_size_of_parameters), ""); |
twisti@3969 | 172 | Label L; |
twisti@3969 | 173 | __ cmpptr(recv, __ argument_address(temp2, -1)); |
twisti@3969 | 174 | __ jcc(Assembler::equal, L); |
twisti@3969 | 175 | __ movptr(rax, __ argument_address(temp2, -1)); |
twisti@3969 | 176 | __ STOP("receiver not on stack"); |
twisti@3969 | 177 | __ BIND(L); |
twisti@3969 | 178 | } |
twisti@3969 | 179 | |
twisti@3969 | 180 | jump_from_method_handle(_masm, method_temp, temp2, for_compiler_entry); |
twisti@3969 | 181 | BLOCK_COMMENT("} jump_to_lambda_form"); |
twisti@3969 | 182 | } |
twisti@3969 | 183 | |
twisti@3969 | 184 | |
jrose@1145 | 185 | // Code generation |
twisti@3969 | 186 | address MethodHandles::generate_method_handle_interpreter_entry(MacroAssembler* _masm, |
twisti@3969 | 187 | vmIntrinsics::ID iid) { |
twisti@3969 | 188 | const bool not_for_compiler_entry = false; // this is the interpreter entry |
twisti@3969 | 189 | assert(is_signature_polymorphic(iid), "expected invoke iid"); |
twisti@3969 | 190 | if (iid == vmIntrinsics::_invokeGeneric || |
twisti@3969 | 191 | iid == vmIntrinsics::_compiledLambdaForm) { |
twisti@3969 | 192 | // Perhaps surprisingly, the symbolic references visible to Java are not directly used. |
twisti@3969 | 193 | // They are linked to Java-generated adapters via MethodHandleNatives.linkMethod. |
twisti@3969 | 194 | // They all allow an appendix argument. |
twisti@3969 | 195 | __ hlt(); // empty stubs make SG sick |
twisti@3969 | 196 | return NULL; |
twisti@3969 | 197 | } |
twisti@3969 | 198 | |
twisti@3969 | 199 | // rsi/r13: sender SP (must preserve; see prepare_to_jump_from_interpreted) |
coleenp@4037 | 200 | // rbx: Method* |
twisti@3969 | 201 | // rdx: argument locator (parameter slot count, added to rsp) |
twisti@3969 | 202 | // rcx: used as temp to hold mh or receiver |
twisti@3969 | 203 | // rax, rdi: garbage temps, blown away |
twisti@3969 | 204 | Register rdx_argp = rdx; // argument list ptr, live on error paths |
twisti@3969 | 205 | Register rax_temp = rax; |
twisti@3969 | 206 | Register rcx_mh = rcx; // MH receiver; dies quickly and is recycled |
twisti@3969 | 207 | Register rbx_method = rbx; // eventual target of this invocation |
jrose@1145 | 208 | |
jrose@1145 | 209 | // here's where control starts out: |
jrose@1145 | 210 | __ align(CodeEntryAlignment); |
jrose@1145 | 211 | address entry_point = __ pc(); |
jrose@1145 | 212 | |
twisti@3969 | 213 | if (VerifyMethodHandles) { |
twisti@3969 | 214 | Label L; |
twisti@3969 | 215 | BLOCK_COMMENT("verify_intrinsic_id {"); |
coleenp@4037 | 216 | __ cmpb(Address(rbx_method, Method::intrinsic_id_offset_in_bytes()), (int) iid); |
twisti@3969 | 217 | __ jcc(Assembler::equal, L); |
twisti@3969 | 218 | if (iid == vmIntrinsics::_linkToVirtual || |
twisti@3969 | 219 | iid == vmIntrinsics::_linkToSpecial) { |
twisti@3969 | 220 | // could do this for all kinds, but would explode assembly code size |
coleenp@4037 | 221 | trace_method_handle(_masm, "bad Method*::intrinsic_id"); |
jrose@1145 | 222 | } |
coleenp@4037 | 223 | __ STOP("bad Method*::intrinsic_id"); |
twisti@3969 | 224 | __ bind(L); |
twisti@3969 | 225 | BLOCK_COMMENT("} verify_intrinsic_id"); |
jrose@1145 | 226 | } |
jrose@1145 | 227 | |
twisti@3969 | 228 | // First task: Find out how big the argument list is. |
twisti@3969 | 229 | Address rdx_first_arg_addr; |
twisti@3969 | 230 | int ref_kind = signature_polymorphic_intrinsic_ref_kind(iid); |
twisti@3969 | 231 | assert(ref_kind != 0 || iid == vmIntrinsics::_invokeBasic, "must be _invokeBasic or a linkTo intrinsic"); |
twisti@3969 | 232 | if (ref_kind == 0 || MethodHandles::ref_kind_has_receiver(ref_kind)) { |
jiangli@4338 | 233 | __ movptr(rdx_argp, Address(rbx_method, Method::const_offset())); |
twisti@3969 | 234 | __ load_sized_value(rdx_argp, |
jiangli@4338 | 235 | Address(rdx_argp, ConstMethod::size_of_parameters_offset()), |
twisti@3969 | 236 | sizeof(u2), /*is_signed*/ false); |
coleenp@4037 | 237 | // assert(sizeof(u2) == sizeof(Method::_size_of_parameters), ""); |
twisti@3969 | 238 | rdx_first_arg_addr = __ argument_address(rdx_argp, -1); |
twisti@3969 | 239 | } else { |
twisti@3969 | 240 | DEBUG_ONLY(rdx_argp = noreg); |
twisti@3969 | 241 | } |
jrose@1145 | 242 | |
twisti@3969 | 243 | if (!is_signature_polymorphic_static(iid)) { |
twisti@3969 | 244 | __ movptr(rcx_mh, rdx_first_arg_addr); |
twisti@3969 | 245 | DEBUG_ONLY(rdx_argp = noreg); |
twisti@3969 | 246 | } |
jrose@2148 | 247 | |
twisti@3969 | 248 | // rdx_first_arg_addr is live! |
never@2895 | 249 | |
twisti@4158 | 250 | trace_method_handle_interpreter_entry(_masm, iid); |
never@2895 | 251 | |
twisti@3969 | 252 | if (iid == vmIntrinsics::_invokeBasic) { |
twisti@3969 | 253 | generate_method_handle_dispatch(_masm, iid, rcx_mh, noreg, not_for_compiler_entry); |
jrose@2148 | 254 | |
twisti@3969 | 255 | } else { |
twisti@3969 | 256 | // Adjust argument list by popping the trailing MemberName argument. |
twisti@3969 | 257 | Register rcx_recv = noreg; |
twisti@3969 | 258 | if (MethodHandles::ref_kind_has_receiver(ref_kind)) { |
twisti@3969 | 259 | // Load the receiver (not the MH; the actual MemberName's receiver) up from the interpreter stack. |
twisti@3969 | 260 | __ movptr(rcx_recv = rcx, rdx_first_arg_addr); |
twisti@3969 | 261 | } |
twisti@3969 | 262 | DEBUG_ONLY(rdx_argp = noreg); |
twisti@3969 | 263 | Register rbx_member = rbx_method; // MemberName ptr; incoming method ptr is dead now |
twisti@3969 | 264 | __ pop(rax_temp); // return address |
twisti@3969 | 265 | __ pop(rbx_member); // extract last argument |
twisti@3969 | 266 | __ push(rax_temp); // re-push return address |
twisti@3969 | 267 | generate_method_handle_dispatch(_masm, iid, rcx_recv, rbx_member, not_for_compiler_entry); |
twisti@3969 | 268 | } |
never@3136 | 269 | |
jrose@1145 | 270 | return entry_point; |
jrose@1145 | 271 | } |
jrose@1145 | 272 | |
twisti@3969 | 273 | void MethodHandles::generate_method_handle_dispatch(MacroAssembler* _masm, |
twisti@3969 | 274 | vmIntrinsics::ID iid, |
twisti@3969 | 275 | Register receiver_reg, |
twisti@3969 | 276 | Register member_reg, |
twisti@3969 | 277 | bool for_compiler_entry) { |
twisti@3969 | 278 | assert(is_signature_polymorphic(iid), "expected invoke iid"); |
twisti@3969 | 279 | Register rbx_method = rbx; // eventual target of this invocation |
twisti@3969 | 280 | // temps used in this code are not used in *either* compiled or interpreted calling sequences |
twisti@3969 | 281 | #ifdef _LP64 |
twisti@3969 | 282 | Register temp1 = rscratch1; |
twisti@3969 | 283 | Register temp2 = rscratch2; |
twisti@3969 | 284 | Register temp3 = rax; |
twisti@3969 | 285 | if (for_compiler_entry) { |
twisti@3969 | 286 | assert(receiver_reg == (iid == vmIntrinsics::_linkToStatic ? noreg : j_rarg0), "only valid assignment"); |
twisti@3969 | 287 | assert_different_registers(temp1, j_rarg0, j_rarg1, j_rarg2, j_rarg3, j_rarg4, j_rarg5); |
twisti@3969 | 288 | assert_different_registers(temp2, j_rarg0, j_rarg1, j_rarg2, j_rarg3, j_rarg4, j_rarg5); |
twisti@3969 | 289 | assert_different_registers(temp3, j_rarg0, j_rarg1, j_rarg2, j_rarg3, j_rarg4, j_rarg5); |
jrose@1145 | 290 | } |
twisti@3969 | 291 | #else |
twisti@3969 | 292 | Register temp1 = (for_compiler_entry ? rsi : rdx); |
twisti@3969 | 293 | Register temp2 = rdi; |
twisti@3969 | 294 | Register temp3 = rax; |
twisti@3969 | 295 | if (for_compiler_entry) { |
twisti@3969 | 296 | assert(receiver_reg == (iid == vmIntrinsics::_linkToStatic ? noreg : rcx), "only valid assignment"); |
twisti@3969 | 297 | assert_different_registers(temp1, rcx, rdx); |
twisti@3969 | 298 | assert_different_registers(temp2, rcx, rdx); |
twisti@3969 | 299 | assert_different_registers(temp3, rcx, rdx); |
never@2895 | 300 | } |
never@2895 | 301 | #endif |
twisti@4101 | 302 | else { |
twisti@4101 | 303 | assert_different_registers(temp1, temp2, temp3, saved_last_sp_register()); // don't trash lastSP |
twisti@4101 | 304 | } |
twisti@3969 | 305 | assert_different_registers(temp1, temp2, temp3, receiver_reg); |
twisti@3969 | 306 | assert_different_registers(temp1, temp2, temp3, member_reg); |
never@2895 | 307 | |
twisti@3969 | 308 | if (iid == vmIntrinsics::_invokeBasic) { |
twisti@3969 | 309 | // indirect through MH.form.vmentry.vmtarget |
twisti@3969 | 310 | jump_to_lambda_form(_masm, receiver_reg, rbx_method, temp1, for_compiler_entry); |
twisti@3969 | 311 | |
twisti@3969 | 312 | } else { |
twisti@3969 | 313 | // The method is a member invoker used by direct method handles. |
twisti@3969 | 314 | if (VerifyMethodHandles) { |
twisti@3969 | 315 | // make sure the trailing argument really is a MemberName (caller responsibility) |
coleenp@4037 | 316 | verify_klass(_masm, member_reg, SystemDictionary::WK_KLASS_ENUM_NAME(java_lang_invoke_MemberName), |
twisti@3969 | 317 | "MemberName required for invokeVirtual etc."); |
never@2895 | 318 | } |
twisti@3969 | 319 | |
twisti@3969 | 320 | Address member_clazz( member_reg, NONZERO(java_lang_invoke_MemberName::clazz_offset_in_bytes())); |
twisti@3969 | 321 | Address member_vmindex( member_reg, NONZERO(java_lang_invoke_MemberName::vmindex_offset_in_bytes())); |
twisti@3969 | 322 | Address member_vmtarget( member_reg, NONZERO(java_lang_invoke_MemberName::vmtarget_offset_in_bytes())); |
twisti@3969 | 323 | |
twisti@3969 | 324 | Register temp1_recv_klass = temp1; |
twisti@3969 | 325 | if (iid != vmIntrinsics::_linkToStatic) { |
twisti@3969 | 326 | __ verify_oop(receiver_reg); |
twisti@3969 | 327 | if (iid == vmIntrinsics::_linkToSpecial) { |
twisti@3969 | 328 | // Don't actually load the klass; just null-check the receiver. |
twisti@3969 | 329 | __ null_check(receiver_reg); |
twisti@3969 | 330 | } else { |
twisti@3969 | 331 | // load receiver klass itself |
twisti@3969 | 332 | __ null_check(receiver_reg, oopDesc::klass_offset_in_bytes()); |
twisti@3969 | 333 | __ load_klass(temp1_recv_klass, receiver_reg); |
coleenp@4052 | 334 | __ verify_klass_ptr(temp1_recv_klass); |
twisti@3969 | 335 | } |
twisti@3969 | 336 | BLOCK_COMMENT("check_receiver {"); |
twisti@3969 | 337 | // The receiver for the MemberName must be in receiver_reg. |
twisti@3969 | 338 | // Check the receiver against the MemberName.clazz |
twisti@3969 | 339 | if (VerifyMethodHandles && iid == vmIntrinsics::_linkToSpecial) { |
twisti@3969 | 340 | // Did not load it above... |
twisti@3969 | 341 | __ load_klass(temp1_recv_klass, receiver_reg); |
coleenp@4052 | 342 | __ verify_klass_ptr(temp1_recv_klass); |
twisti@3969 | 343 | } |
twisti@3969 | 344 | if (VerifyMethodHandles && iid != vmIntrinsics::_linkToInterface) { |
twisti@3969 | 345 | Label L_ok; |
twisti@3969 | 346 | Register temp2_defc = temp2; |
twisti@3969 | 347 | __ load_heap_oop(temp2_defc, member_clazz); |
twisti@3969 | 348 | load_klass_from_Class(_masm, temp2_defc); |
coleenp@4052 | 349 | __ verify_klass_ptr(temp2_defc); |
twisti@3969 | 350 | __ check_klass_subtype(temp1_recv_klass, temp2_defc, temp3, L_ok); |
twisti@3969 | 351 | // If we get here, the type check failed! |
twisti@3969 | 352 | __ STOP("receiver class disagrees with MemberName.clazz"); |
twisti@3969 | 353 | __ bind(L_ok); |
twisti@3969 | 354 | } |
twisti@3969 | 355 | BLOCK_COMMENT("} check_receiver"); |
twisti@3969 | 356 | } |
twisti@3969 | 357 | if (iid == vmIntrinsics::_linkToSpecial || |
twisti@3969 | 358 | iid == vmIntrinsics::_linkToStatic) { |
twisti@3969 | 359 | DEBUG_ONLY(temp1_recv_klass = noreg); // these guys didn't load the recv_klass |
twisti@3969 | 360 | } |
twisti@3969 | 361 | |
twisti@3969 | 362 | // Live registers at this point: |
twisti@3969 | 363 | // member_reg - MemberName that was the trailing argument |
twisti@3969 | 364 | // temp1_recv_klass - klass of stacked receiver, if needed |
twisti@3969 | 365 | // rsi/r13 - interpreter linkage (if interpreted) |
twisti@3969 | 366 | // rcx, rdx, rsi, rdi, r8, r8 - compiler arguments (if compiled) |
twisti@3969 | 367 | |
twisti@4101 | 368 | Label L_incompatible_class_change_error; |
twisti@3969 | 369 | switch (iid) { |
twisti@3969 | 370 | case vmIntrinsics::_linkToSpecial: |
twisti@3969 | 371 | if (VerifyMethodHandles) { |
twisti@3969 | 372 | verify_ref_kind(_masm, JVM_REF_invokeSpecial, member_reg, temp3); |
twisti@3969 | 373 | } |
coleenp@4037 | 374 | __ movptr(rbx_method, member_vmtarget); |
twisti@3969 | 375 | break; |
twisti@3969 | 376 | |
twisti@3969 | 377 | case vmIntrinsics::_linkToStatic: |
twisti@3969 | 378 | if (VerifyMethodHandles) { |
twisti@3969 | 379 | verify_ref_kind(_masm, JVM_REF_invokeStatic, member_reg, temp3); |
twisti@3969 | 380 | } |
coleenp@4037 | 381 | __ movptr(rbx_method, member_vmtarget); |
twisti@3969 | 382 | break; |
twisti@3969 | 383 | |
twisti@3969 | 384 | case vmIntrinsics::_linkToVirtual: |
twisti@3969 | 385 | { |
twisti@3969 | 386 | // same as TemplateTable::invokevirtual, |
twisti@3969 | 387 | // minus the CP setup and profiling: |
twisti@3969 | 388 | |
twisti@3969 | 389 | if (VerifyMethodHandles) { |
twisti@3969 | 390 | verify_ref_kind(_masm, JVM_REF_invokeVirtual, member_reg, temp3); |
twisti@3969 | 391 | } |
twisti@3969 | 392 | |
twisti@3969 | 393 | // pick out the vtable index from the MemberName, and then we can discard it: |
twisti@3969 | 394 | Register temp2_index = temp2; |
twisti@3969 | 395 | __ movptr(temp2_index, member_vmindex); |
twisti@3969 | 396 | |
twisti@3969 | 397 | if (VerifyMethodHandles) { |
twisti@3969 | 398 | Label L_index_ok; |
twisti@3969 | 399 | __ cmpl(temp2_index, 0); |
twisti@3969 | 400 | __ jcc(Assembler::greaterEqual, L_index_ok); |
twisti@3969 | 401 | __ STOP("no virtual index"); |
twisti@3969 | 402 | __ BIND(L_index_ok); |
twisti@3969 | 403 | } |
twisti@3969 | 404 | |
twisti@3969 | 405 | // Note: The verifier invariants allow us to ignore MemberName.clazz and vmtarget |
twisti@3969 | 406 | // at this point. And VerifyMethodHandles has already checked clazz, if needed. |
twisti@3969 | 407 | |
coleenp@4037 | 408 | // get target Method* & entry point |
twisti@3969 | 409 | __ lookup_virtual_method(temp1_recv_klass, temp2_index, rbx_method); |
twisti@3969 | 410 | break; |
twisti@3969 | 411 | } |
twisti@3969 | 412 | |
twisti@3969 | 413 | case vmIntrinsics::_linkToInterface: |
twisti@3969 | 414 | { |
twisti@3969 | 415 | // same as TemplateTable::invokeinterface |
twisti@3969 | 416 | // (minus the CP setup and profiling, with different argument motion) |
twisti@3969 | 417 | if (VerifyMethodHandles) { |
twisti@3969 | 418 | verify_ref_kind(_masm, JVM_REF_invokeInterface, member_reg, temp3); |
twisti@3969 | 419 | } |
twisti@3969 | 420 | |
twisti@3969 | 421 | Register temp3_intf = temp3; |
twisti@3969 | 422 | __ load_heap_oop(temp3_intf, member_clazz); |
twisti@3969 | 423 | load_klass_from_Class(_masm, temp3_intf); |
coleenp@4052 | 424 | __ verify_klass_ptr(temp3_intf); |
twisti@3969 | 425 | |
twisti@3969 | 426 | Register rbx_index = rbx_method; |
twisti@3969 | 427 | __ movptr(rbx_index, member_vmindex); |
twisti@3969 | 428 | if (VerifyMethodHandles) { |
twisti@3969 | 429 | Label L; |
twisti@3969 | 430 | __ cmpl(rbx_index, 0); |
twisti@3969 | 431 | __ jcc(Assembler::greaterEqual, L); |
twisti@3969 | 432 | __ STOP("invalid vtable index for MH.invokeInterface"); |
twisti@3969 | 433 | __ bind(L); |
twisti@3969 | 434 | } |
twisti@3969 | 435 | |
twisti@3969 | 436 | // given intf, index, and recv klass, dispatch to the implementation method |
twisti@3969 | 437 | __ lookup_interface_method(temp1_recv_klass, temp3_intf, |
twisti@3969 | 438 | // note: next two args must be the same: |
twisti@3969 | 439 | rbx_index, rbx_method, |
twisti@3969 | 440 | temp2, |
twisti@4101 | 441 | L_incompatible_class_change_error); |
twisti@3969 | 442 | break; |
twisti@3969 | 443 | } |
twisti@3969 | 444 | |
twisti@3969 | 445 | default: |
twisti@4101 | 446 | fatal(err_msg_res("unexpected intrinsic %d: %s", iid, vmIntrinsics::name_at(iid))); |
twisti@3969 | 447 | break; |
twisti@3969 | 448 | } |
twisti@3969 | 449 | |
twisti@4101 | 450 | // Live at this point: |
twisti@4101 | 451 | // rbx_method |
twisti@4101 | 452 | // rsi/r13 (if interpreted) |
twisti@3969 | 453 | |
twisti@4101 | 454 | // After figuring out which concrete method to call, jump into it. |
twisti@4101 | 455 | // Note that this works in the interpreter with no data motion. |
twisti@4101 | 456 | // But the compiled version will require that rcx_recv be shifted out. |
twisti@4101 | 457 | __ verify_method_ptr(rbx_method); |
twisti@4101 | 458 | jump_from_method_handle(_masm, rbx_method, temp1, for_compiler_entry); |
twisti@4101 | 459 | |
twisti@4101 | 460 | if (iid == vmIntrinsics::_linkToInterface) { |
twisti@4101 | 461 | __ bind(L_incompatible_class_change_error); |
twisti@4101 | 462 | __ jump(RuntimeAddress(StubRoutines::throw_IncompatibleClassChangeError_entry())); |
twisti@3969 | 463 | } |
never@2895 | 464 | } |
never@2895 | 465 | } |
never@2895 | 466 | |
bdelsart@3451 | 467 | #ifndef PRODUCT |
jrose@1145 | 468 | void trace_method_handle_stub(const char* adaptername, |
never@2895 | 469 | oop mh, |
never@2895 | 470 | intptr_t* saved_regs, |
twisti@3566 | 471 | intptr_t* entry_sp) { |
jrose@1145 | 472 | // called as a leaf from native code: do not block the JVM! |
twisti@3969 | 473 | bool has_mh = (strstr(adaptername, "/static") == NULL && |
twisti@3969 | 474 | strstr(adaptername, "linkTo") == NULL); // static linkers don't have MH |
twisti@3566 | 475 | const char* mh_reg_name = has_mh ? "rcx_mh" : "rcx"; |
twisti@3969 | 476 | tty->print_cr("MH %s %s="PTR_FORMAT" sp="PTR_FORMAT, |
twisti@3969 | 477 | adaptername, mh_reg_name, |
hseigel@5784 | 478 | (void *)mh, entry_sp); |
bdelsart@3451 | 479 | |
jrose@2148 | 480 | if (Verbose) { |
twisti@3566 | 481 | tty->print_cr("Registers:"); |
twisti@3566 | 482 | const int saved_regs_count = RegisterImpl::number_of_registers; |
twisti@3566 | 483 | for (int i = 0; i < saved_regs_count; i++) { |
twisti@3566 | 484 | Register r = as_Register(i); |
twisti@3566 | 485 | // The registers are stored in reverse order on the stack (by pusha). |
twisti@3566 | 486 | tty->print("%3s=" PTR_FORMAT, r->name(), saved_regs[((saved_regs_count - 1) - i)]); |
twisti@3566 | 487 | if ((i + 1) % 4 == 0) { |
never@2895 | 488 | tty->cr(); |
twisti@3566 | 489 | } else { |
twisti@3566 | 490 | tty->print(", "); |
never@2895 | 491 | } |
never@2895 | 492 | } |
never@2895 | 493 | tty->cr(); |
bdelsart@3451 | 494 | |
bdelsart@3451 | 495 | { |
bdelsart@3451 | 496 | // dumping last frame with frame::describe |
bdelsart@3451 | 497 | |
bdelsart@3451 | 498 | JavaThread* p = JavaThread::active(); |
bdelsart@3451 | 499 | |
bdelsart@3451 | 500 | ResourceMark rm; |
bdelsart@3451 | 501 | PRESERVE_EXCEPTION_MARK; // may not be needed by safer and unexpensive here |
bdelsart@3451 | 502 | FrameValues values; |
bdelsart@3451 | 503 | |
bdelsart@3451 | 504 | // Note: We want to allow trace_method_handle from any call site. |
bdelsart@3451 | 505 | // While trace_method_handle creates a frame, it may be entered |
bdelsart@3451 | 506 | // without a PC on the stack top (e.g. not just after a call). |
bdelsart@3451 | 507 | // Walking that frame could lead to failures due to that invalid PC. |
bdelsart@3451 | 508 | // => carefully detect that frame when doing the stack walking |
bdelsart@3451 | 509 | |
bdelsart@3451 | 510 | // Current C frame |
bdelsart@3451 | 511 | frame cur_frame = os::current_frame(); |
bdelsart@3451 | 512 | |
bdelsart@3451 | 513 | // Robust search of trace_calling_frame (independant of inlining). |
bdelsart@3451 | 514 | // Assumes saved_regs comes from a pusha in the trace_calling_frame. |
bdelsart@3451 | 515 | assert(cur_frame.sp() < saved_regs, "registers not saved on stack ?"); |
bdelsart@3451 | 516 | frame trace_calling_frame = os::get_sender_for_C_frame(&cur_frame); |
bdelsart@3451 | 517 | while (trace_calling_frame.fp() < saved_regs) { |
bdelsart@3451 | 518 | trace_calling_frame = os::get_sender_for_C_frame(&trace_calling_frame); |
bdelsart@3451 | 519 | } |
bdelsart@3451 | 520 | |
bdelsart@3451 | 521 | // safely create a frame and call frame::describe |
bdelsart@3451 | 522 | intptr_t *dump_sp = trace_calling_frame.sender_sp(); |
bdelsart@3451 | 523 | intptr_t *dump_fp = trace_calling_frame.link(); |
bdelsart@3451 | 524 | |
bdelsart@3451 | 525 | bool walkable = has_mh; // whether the traced frame shoud be walkable |
bdelsart@3451 | 526 | |
bdelsart@3451 | 527 | if (walkable) { |
bdelsart@3451 | 528 | // The previous definition of walkable may have to be refined |
bdelsart@3451 | 529 | // if new call sites cause the next frame constructor to start |
bdelsart@3451 | 530 | // failing. Alternatively, frame constructors could be |
bdelsart@3451 | 531 | // modified to support the current or future non walkable |
bdelsart@3451 | 532 | // frames (but this is more intrusive and is not considered as |
bdelsart@3451 | 533 | // part of this RFE, which will instead use a simpler output). |
bdelsart@3451 | 534 | frame dump_frame = frame(dump_sp, dump_fp); |
bdelsart@3451 | 535 | dump_frame.describe(values, 1); |
bdelsart@3451 | 536 | } else { |
bdelsart@3451 | 537 | // Stack may not be walkable (invalid PC above FP): |
bdelsart@3451 | 538 | // Add descriptions without building a Java frame to avoid issues |
bdelsart@3451 | 539 | values.describe(-1, dump_fp, "fp for #1 <not parsed, cannot trust pc>"); |
bdelsart@3451 | 540 | values.describe(-1, dump_sp, "sp for #1"); |
bdelsart@3451 | 541 | } |
twisti@3969 | 542 | values.describe(-1, entry_sp, "raw top of stack"); |
bdelsart@3451 | 543 | |
twisti@3566 | 544 | tty->print_cr("Stack layout:"); |
bdelsart@3451 | 545 | values.print(p); |
never@2895 | 546 | } |
twisti@3969 | 547 | if (has_mh && mh->is_oop()) { |
twisti@3969 | 548 | mh->print(); |
twisti@3969 | 549 | if (java_lang_invoke_MethodHandle::is_instance(mh)) { |
twisti@3969 | 550 | if (java_lang_invoke_MethodHandle::form_offset_in_bytes() != 0) |
twisti@3969 | 551 | java_lang_invoke_MethodHandle::form(mh)->print(); |
twisti@3969 | 552 | } |
twisti@3969 | 553 | } |
jrose@2148 | 554 | } |
jrose@2148 | 555 | } |
never@2895 | 556 | |
never@2895 | 557 | // The stub wraps the arguments in a struct on the stack to avoid |
never@2895 | 558 | // dealing with the different calling conventions for passing 6 |
never@2895 | 559 | // arguments. |
never@2895 | 560 | struct MethodHandleStubArguments { |
never@2895 | 561 | const char* adaptername; |
never@2895 | 562 | oopDesc* mh; |
never@2895 | 563 | intptr_t* saved_regs; |
never@2895 | 564 | intptr_t* entry_sp; |
never@2895 | 565 | }; |
never@2895 | 566 | void trace_method_handle_stub_wrapper(MethodHandleStubArguments* args) { |
never@2895 | 567 | trace_method_handle_stub(args->adaptername, |
never@2895 | 568 | args->mh, |
never@2895 | 569 | args->saved_regs, |
twisti@3566 | 570 | args->entry_sp); |
never@2895 | 571 | } |
never@2895 | 572 | |
jrose@2148 | 573 | void MethodHandles::trace_method_handle(MacroAssembler* _masm, const char* adaptername) { |
jrose@2148 | 574 | if (!TraceMethodHandles) return; |
jrose@2148 | 575 | BLOCK_COMMENT("trace_method_handle {"); |
bdelsart@3451 | 576 | __ enter(); |
bdelsart@3451 | 577 | __ andptr(rsp, -16); // align stack if needed for FPU state |
jrose@2148 | 578 | __ pusha(); |
bdelsart@3451 | 579 | __ mov(rbx, rsp); // for retreiving saved_regs |
bdelsart@3451 | 580 | // Note: saved_regs must be in the entered frame for the |
bdelsart@3451 | 581 | // robust stack walking implemented in trace_method_handle_stub. |
bdelsart@3451 | 582 | |
bdelsart@3451 | 583 | // save FP result, valid at some call sites (adapter_opt_return_float, ...) |
bdelsart@3451 | 584 | __ increment(rsp, -2 * wordSize); |
bdelsart@3451 | 585 | if (UseSSE >= 2) { |
bdelsart@3451 | 586 | __ movdbl(Address(rsp, 0), xmm0); |
bdelsart@3451 | 587 | } else if (UseSSE == 1) { |
bdelsart@3451 | 588 | __ movflt(Address(rsp, 0), xmm0); |
bdelsart@3451 | 589 | } else { |
bdelsart@3451 | 590 | __ fst_d(Address(rsp, 0)); |
bdelsart@3451 | 591 | } |
bdelsart@3451 | 592 | |
twisti@3566 | 593 | // Incoming state: |
never@2868 | 594 | // rcx: method handle |
twisti@3566 | 595 | // |
twisti@3566 | 596 | // To avoid calling convention issues, build a record on the stack |
twisti@3566 | 597 | // and pass the pointer to that instead. |
bdelsart@3451 | 598 | __ push(rbp); // entry_sp (with extra align space) |
never@2895 | 599 | __ push(rbx); // pusha saved_regs |
never@2895 | 600 | __ push(rcx); // mh |
bdelsart@3451 | 601 | __ push(rcx); // slot for adaptername |
never@2895 | 602 | __ movptr(Address(rsp, 0), (intptr_t) adaptername); |
never@2895 | 603 | __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, trace_method_handle_stub_wrapper), rsp); |
twisti@3566 | 604 | __ increment(rsp, sizeof(MethodHandleStubArguments)); |
bdelsart@3451 | 605 | |
bdelsart@3451 | 606 | if (UseSSE >= 2) { |
bdelsart@3451 | 607 | __ movdbl(xmm0, Address(rsp, 0)); |
bdelsart@3451 | 608 | } else if (UseSSE == 1) { |
bdelsart@3451 | 609 | __ movflt(xmm0, Address(rsp, 0)); |
bdelsart@3451 | 610 | } else { |
bdelsart@3451 | 611 | __ fld_d(Address(rsp, 0)); |
bdelsart@3451 | 612 | } |
bdelsart@3451 | 613 | __ increment(rsp, 2 * wordSize); |
bdelsart@3451 | 614 | |
bdelsart@3451 | 615 | __ popa(); |
never@2895 | 616 | __ leave(); |
jrose@2148 | 617 | BLOCK_COMMENT("} trace_method_handle"); |
jrose@1145 | 618 | } |
jrose@1145 | 619 | #endif //PRODUCT |