696
697 // handle the case of an anchor explicitly set in continuation code that doesn't have a callee
698 JavaThread* thread = reg_map->thread();
699 if ((thread->has_last_Java_frame() && fr.sp() == thread->last_Java_sp())
700 JVMTI_ONLY(|| (method()->is_continuation_enter_intrinsic() && thread->on_monitor_waited_event()))) {
701 return;
702 }
703
704 if (!method()->is_native()) {
705 address pc = fr.pc();
706 bool has_receiver, has_appendix;
707 Symbol* signature;
708
709 // The method attached by JIT-compilers should be used, if present.
710 // Bytecode can be inaccurate in such case.
711 Method* callee = attached_method_before_pc(pc);
712 if (callee != nullptr) {
713 has_receiver = !(callee->access_flags().is_static());
714 has_appendix = false;
715 signature = callee->signature();
716 } else {
717 SimpleScopeDesc ssd(this, pc);
718
719 Bytecode_invoke call(methodHandle(Thread::current(), ssd.method()), ssd.bci());
720 has_receiver = call.has_receiver();
721 has_appendix = call.has_appendix();
722 signature = call.signature();
723 }
724
725 fr.oops_compiled_arguments_do(signature, has_receiver, has_appendix, reg_map, f);
726 } else if (method()->is_continuation_enter_intrinsic()) {
727 // This method only calls Continuation.enter()
728 Symbol* signature = vmSymbols::continuationEnter_signature();
729 fr.oops_compiled_arguments_do(signature, false, false, reg_map, f);
730 }
731 }
732
733 Method* nmethod::attached_method(address call_instr) {
734 assert(code_contains(call_instr), "not part of the nmethod");
735 RelocIterator iter(this, call_instr, call_instr + 1);
1226
1227 _has_unsafe_access = 0;
1228 _has_wide_vectors = 0;
1229 _has_monitors = 0;
1230 _has_scoped_access = 0;
1231 _has_flushed_dependencies = 0;
1232 _is_unlinked = 0;
1233 _load_reported = 0; // jvmti state
1234
1235 _deoptimization_status = not_marked;
1236
1237 // SECT_CONSTS is first in code buffer so the offset should be 0.
1238 int consts_offset = code_buffer->total_offset_of(code_buffer->consts());
1239 assert(consts_offset == 0, "const_offset: %d", consts_offset);
1240
1241 _stub_offset = content_offset() + code_buffer->total_offset_of(code_buffer->stubs());
1242
1243 CHECKED_CAST(_entry_offset, uint16_t, (offsets->value(CodeOffsets::Entry)));
1244 CHECKED_CAST(_verified_entry_offset, uint16_t, (offsets->value(CodeOffsets::Verified_Entry)));
1245
1246 _skipped_instructions_size = code_buffer->total_skipped_instructions_size();
1247 }
1248
1249 // Post initialization
1250 void nmethod::post_init() {
1251 clear_unloading_state();
1252
1253 finalize_relocations();
1254
1255 Universe::heap()->register_nmethod(this);
1256 DEBUG_ONLY(Universe::heap()->verify_nmethod(this));
1257
1258 CodeCache::commit(this);
1259 }
1260
1261 // For native wrappers
1262 nmethod::nmethod(
1263 Method* method,
1264 CompilerType type,
1265 int nmethod_size,
1266 int compile_id,
1267 CodeOffsets* offsets,
1268 CodeBuffer* code_buffer,
1269 int frame_size,
1270 ByteSize basic_lock_owner_sp_offset,
1271 ByteSize basic_lock_sp_offset,
1272 OopMapSet* oop_maps,
1273 int mutable_data_size)
1274 : CodeBlob("native nmethod", CodeBlobKind::Nmethod, code_buffer, nmethod_size, sizeof(nmethod),
1275 offsets->value(CodeOffsets::Frame_Complete), frame_size, oop_maps, false, mutable_data_size),
1276 _deoptimization_generation(0),
1277 _gc_epoch(CodeCache::gc_epoch()),
1278 _method(method),
1279 _native_receiver_sp_offset(basic_lock_owner_sp_offset),
1280 _native_basic_lock_sp_offset(basic_lock_sp_offset)
1281 {
1282 {
1283 DEBUG_ONLY(NoSafepointVerifier nsv;)
1284 assert_locked_or_safepoint(CodeCache_lock);
1285
1286 init_defaults(code_buffer, offsets);
1287
1288 _osr_entry_point = nullptr;
1289 _pc_desc_container = nullptr;
1290 _entry_bci = InvocationEntryBci;
1291 _compile_id = compile_id;
1292 _comp_level = CompLevel_none;
1293 _compiler_type = type;
1294 _orig_pc_offset = 0;
1295 _num_stack_arg_slots = 0;
1296
1297 if (offsets->value(CodeOffsets::Exceptions) != -1) {
1298 // Continuation enter intrinsic
1299 _exception_offset = code_offset() + offsets->value(CodeOffsets::Exceptions);
1300 } else {
1301 _exception_offset = 0;
1302 }
1303 // Native wrappers do not have deopt handlers. Make the values
1304 // something that will never match a pc like the nmethod vtable entry
1305 _deopt_handler_entry_offset = 0;
1736 _exception_offset = -1;
1737 }
1738
1739 _deopt_handler_entry_offset = _stub_offset + offsets->value(CodeOffsets::Deopt);
1740 }
1741 if (offsets->value(CodeOffsets::UnwindHandler) != -1) {
1742 // C1 generates UnwindHandler at the end of instructions section.
1743 // Calculate positive offset as distance between the start of stubs section
1744 // (which is also the end of instructions section) and the start of the handler.
1745 int unwind_handler_offset = code_offset() + offsets->value(CodeOffsets::UnwindHandler);
1746 CHECKED_CAST(_unwind_handler_offset, int16_t, (_stub_offset - unwind_handler_offset));
1747 } else {
1748 _unwind_handler_offset = -1;
1749 }
1750
1751 CHECKED_CAST(_oops_size, uint16_t, align_up(code_buffer->total_oop_size(), oopSize));
1752 uint16_t metadata_size;
1753 CHECKED_CAST(metadata_size, uint16_t, align_up(code_buffer->total_metadata_size(), wordSize));
1754 JVMCI_ONLY( _metadata_size = metadata_size; )
1755 int jvmci_data_size = 0 JVMCI_ONLY( + align_up(compiler->is_jvmci() ? jvmci_data->size() : 0, oopSize));
1756 assert(_mutable_data_size == _relocation_size + metadata_size + jvmci_data_size,
1757 "wrong mutable data size: %d != %d + %d + %d",
1758 _mutable_data_size, _relocation_size, metadata_size, jvmci_data_size);
1759 assert(nmethod_size == data_end() - header_begin(), "wrong nmethod size: %d != %d",
1760 nmethod_size, (int)(code_end() - header_begin()));
1761
1762 _immutable_data_size = immutable_data_size;
1763 if (immutable_data_size > 0) {
1764 assert(immutable_data != nullptr, "required");
1765 _immutable_data = immutable_data;
1766 } else {
1767 // We need unique not null address
1768 _immutable_data = blob_end();
1769 }
1770 CHECKED_CAST(_nul_chk_table_offset, uint16_t, (align_up((int)dependencies->size_in_bytes(), oopSize)));
1771 CHECKED_CAST(_handler_table_offset, uint16_t, (_nul_chk_table_offset + align_up(nul_chk_table->size_in_bytes(), oopSize)));
1772 _scopes_pcs_offset = _handler_table_offset + align_up(handler_table->size_in_bytes(), oopSize);
1773 _scopes_data_offset = _scopes_pcs_offset + adjust_pcs_size(debug_info->pcs_size());
1774
1775 #if INCLUDE_JVMCI
3181 }
3182
3183 bool nmethod::check_dependency_on(DepChange& changes) {
3184 // What has happened:
3185 // 1) a new class dependee has been added
3186 // 2) dependee and all its super classes have been marked
3187 bool found_check = false; // set true if we are upset
3188 for (Dependencies::DepStream deps(this); deps.next(); ) {
3189 // Evaluate only relevant dependencies.
3190 if (deps.spot_check_dependency_at(changes) != nullptr) {
3191 found_check = true;
3192 NOT_DEBUG(break);
3193 }
3194 }
3195 return found_check;
3196 }
3197
3198 // Called from mark_for_deoptimization, when dependee is invalidated.
3199 bool nmethod::is_dependent_on_method(Method* dependee) {
3200 for (Dependencies::DepStream deps(this); deps.next(); ) {
3201 if (deps.type() != Dependencies::evol_method)
3202 continue;
3203 Method* method = deps.method_argument(0);
3204 if (method == dependee) return true;
3205 }
3206 return false;
3207 }
3208
3209 void nmethod_init() {
3210 // make sure you didn't forget to adjust the filler fields
3211 assert(sizeof(nmethod) % oopSize == 0, "nmethod size must be multiple of a word");
3212 }
3213
3214 // -----------------------------------------------------------------------------
3215 // Verification
3216
3217 class VerifyOopsClosure: public OopClosure {
3218 nmethod* _nm;
3219 bool _ok;
3220 public:
3221 VerifyOopsClosure(nmethod* nm) : _nm(nm), _ok(true) { }
3222 bool ok() { return _ok; }
3223 virtual void do_oop(oop* p) {
3224 if (oopDesc::is_oop_or_null(*p)) return;
4022 return st.as_string();
4023 }
4024 }
4025 }
4026 return have_one ? "other" : nullptr;
4027 }
4028
4029 // Return the last scope in (begin..end]
4030 ScopeDesc* nmethod::scope_desc_in(address begin, address end) {
4031 PcDesc* p = pc_desc_near(begin+1);
4032 if (p != nullptr && p->real_pc(this) <= end) {
4033 return new ScopeDesc(this, p);
4034 }
4035 return nullptr;
4036 }
4037
4038 const char* nmethod::nmethod_section_label(address pos) const {
4039 const char* label = nullptr;
4040 if (pos == code_begin()) label = "[Instructions begin]";
4041 if (pos == entry_point()) label = "[Entry Point]";
4042 if (pos == verified_entry_point()) label = "[Verified Entry Point]";
4043 if (pos == consts_begin() && pos != insts_begin()) label = "[Constants]";
4044 // Check stub_code before checking exception_handler or deopt_handler.
4045 if (pos == this->stub_begin()) label = "[Stub Code]";
4046 if (JVMCI_ONLY(_exception_offset >= 0 &&) pos == exception_begin()) label = "[Exception Handler]";
4047 if (JVMCI_ONLY(_deopt_handler_entry_offset != -1 &&) pos == deopt_handler_entry()) label = "[Deopt Handler Entry Point]";
4048 return label;
4049 }
4050
4051 void nmethod::print_nmethod_labels(outputStream* stream, address block_begin, bool print_section_labels) const {
4052 if (print_section_labels) {
4053 const char* label = nmethod_section_label(block_begin);
4054 if (label != nullptr) {
4055 stream->bol();
4056 stream->print_cr("%s", label);
4057 }
4058 }
4059
4060 if (block_begin == entry_point()) {
4061 Method* m = method();
4062 if (m != nullptr) {
4063 stream->print(" # ");
4064 m->print_value_on(stream);
4065 stream->cr();
4066 }
4067 if (m != nullptr && !is_osr_method()) {
4068 ResourceMark rm;
4069 int sizeargs = m->size_of_parameters();
4070 BasicType* sig_bt = NEW_RESOURCE_ARRAY(BasicType, sizeargs);
4071 VMRegPair* regs = NEW_RESOURCE_ARRAY(VMRegPair, sizeargs);
4072 {
4073 int sig_index = 0;
4074 if (!m->is_static())
4075 sig_bt[sig_index++] = T_OBJECT; // 'this'
4076 for (SignatureStream ss(m->signature()); !ss.at_return_type(); ss.next()) {
4077 BasicType t = ss.type();
4078 sig_bt[sig_index++] = t;
4079 if (type2size[t] == 2) {
4080 sig_bt[sig_index++] = T_VOID;
4081 } else {
4082 assert(type2size[t] == 1, "size is 1 or 2");
4083 }
4084 }
4085 assert(sig_index == sizeargs, "");
4086 }
4087 const char* spname = "sp"; // make arch-specific?
4088 SharedRuntime::java_calling_convention(sig_bt, regs, sizeargs);
4089 int stack_slot_offset = this->frame_size() * wordSize;
4090 int tab1 = 14, tab2 = 24;
4091 int sig_index = 0;
4092 int arg_index = (m->is_static() ? 0 : -1);
4093 bool did_old_sp = false;
4094 for (SignatureStream ss(m->signature()); !ss.at_return_type(); ) {
4095 bool at_this = (arg_index == -1);
4096 bool at_old_sp = false;
4097 BasicType t = (at_this ? T_OBJECT : ss.type());
4098 assert(t == sig_bt[sig_index], "sigs in sync");
4099 if (at_this)
4100 stream->print(" # this: ");
4101 else
4102 stream->print(" # parm%d: ", arg_index);
4103 stream->move_to(tab1);
4104 VMReg fst = regs[sig_index].first();
4105 VMReg snd = regs[sig_index].second();
4106 if (fst->is_reg()) {
4107 stream->print("%s", fst->name());
4108 if (snd->is_valid()) {
4109 stream->print(":%s", snd->name());
4110 }
4111 } else if (fst->is_stack()) {
4112 int offset = fst->reg2stack() * VMRegImpl::stack_slot_size + stack_slot_offset;
4113 if (offset == stack_slot_offset) at_old_sp = true;
4114 stream->print("[%s+0x%x]", spname, offset);
4115 } else {
4116 stream->print("reg%d:%d??", (int)(intptr_t)fst, (int)(intptr_t)snd);
4117 }
4118 stream->print(" ");
4119 stream->move_to(tab2);
4120 stream->print("= ");
4121 if (at_this) {
4122 m->method_holder()->print_value_on(stream);
4123 } else {
4124 bool did_name = false;
4125 if (!at_this && ss.is_reference()) {
4126 Symbol* name = ss.as_symbol();
4127 name->print_value_on(stream);
4128 did_name = true;
4129 }
4130 if (!did_name)
4131 stream->print("%s", type2name(t));
4132 }
4133 if (at_old_sp) {
4134 stream->print(" (%s of caller)", spname);
4135 did_old_sp = true;
4136 }
4137 stream->cr();
4138 sig_index += type2size[t];
4139 arg_index += 1;
4140 if (!at_this) ss.next();
4141 }
4142 if (!did_old_sp) {
4143 stream->print(" # ");
4144 stream->move_to(tab1);
4145 stream->print("[%s+0x%x]", spname, stack_slot_offset);
4146 stream->print(" (%s of caller)", spname);
4147 stream->cr();
4148 }
4149 }
4150 }
4151 }
4152
4153 // Returns whether this nmethod has code comments.
4154 bool nmethod::has_code_comment(address begin, address end) {
4155 // scopes?
4156 ScopeDesc* sd = scope_desc_in(begin, end);
4157 if (sd != nullptr) return true;
4158
4159 // relocations?
4160 const char* str = reloc_string_for(begin, end);
4161 if (str != nullptr) return true;
4162
4163 // implicit exceptions?
4164 int cont_offset = ImplicitExceptionTable(this).continuation_offset((uint)(begin - code_begin()));
4165 if (cont_offset != 0) return true;
4166
4167 return false;
4168 }
4169
4253 else
4254 st->print("<UNKNOWN>");
4255 break;
4256 }
4257 case Bytecodes::_getfield:
4258 case Bytecodes::_putfield:
4259 case Bytecodes::_getstatic:
4260 case Bytecodes::_putstatic:
4261 {
4262 Bytecode_field field(methodHandle(thread, sd->method()), sd->bci());
4263 st->print(" ");
4264 if (field.name() != nullptr)
4265 field.name()->print_symbol_on(st);
4266 else
4267 st->print("<UNKNOWN>");
4268 }
4269 default:
4270 break;
4271 }
4272 }
4273 st->print(" {reexecute=%d rethrow=%d return_oop=%d}", sd->should_reexecute(), sd->rethrow_exception(), sd->return_oop());
4274 }
4275
4276 // Print all scopes
4277 for (;sd != nullptr; sd = sd->sender()) {
4278 st->move_to(column, 6, 0);
4279 st->print("; -");
4280 if (sd->should_reexecute()) {
4281 st->print(" (reexecute)");
4282 }
4283 if (sd->method() == nullptr) {
4284 st->print("method is nullptr");
4285 } else {
4286 sd->method()->print_short_name(st);
4287 }
4288 int lineno = sd->method()->line_number_from_bci(sd->bci());
4289 if (lineno != -1) {
4290 st->print("@%d (line %d)", sd->bci(), lineno);
4291 } else {
4292 st->print("@%d", sd->bci());
4293 }
|
696
697 // handle the case of an anchor explicitly set in continuation code that doesn't have a callee
698 JavaThread* thread = reg_map->thread();
699 if ((thread->has_last_Java_frame() && fr.sp() == thread->last_Java_sp())
700 JVMTI_ONLY(|| (method()->is_continuation_enter_intrinsic() && thread->on_monitor_waited_event()))) {
701 return;
702 }
703
704 if (!method()->is_native()) {
705 address pc = fr.pc();
706 bool has_receiver, has_appendix;
707 Symbol* signature;
708
709 // The method attached by JIT-compilers should be used, if present.
710 // Bytecode can be inaccurate in such case.
711 Method* callee = attached_method_before_pc(pc);
712 if (callee != nullptr) {
713 has_receiver = !(callee->access_flags().is_static());
714 has_appendix = false;
715 signature = callee->signature();
716
717 // If inline types are passed as fields, use the extended signature
718 // which contains the types of all (oop) fields of the inline type.
719 if (is_compiled_by_c2() && callee->has_scalarized_args()) {
720 const GrowableArray<SigEntry>* sig = callee->adapter()->get_sig_cc();
721 assert(sig != nullptr, "sig should never be null");
722 TempNewSymbol tmp_sig = SigEntry::create_symbol(sig);
723 has_receiver = false; // The extended signature contains the receiver type
724 fr.oops_compiled_arguments_do(tmp_sig, has_receiver, has_appendix, reg_map, f);
725 return;
726 }
727 } else {
728 SimpleScopeDesc ssd(this, pc);
729
730 Bytecode_invoke call(methodHandle(Thread::current(), ssd.method()), ssd.bci());
731 has_receiver = call.has_receiver();
732 has_appendix = call.has_appendix();
733 signature = call.signature();
734 }
735
736 fr.oops_compiled_arguments_do(signature, has_receiver, has_appendix, reg_map, f);
737 } else if (method()->is_continuation_enter_intrinsic()) {
738 // This method only calls Continuation.enter()
739 Symbol* signature = vmSymbols::continuationEnter_signature();
740 fr.oops_compiled_arguments_do(signature, false, false, reg_map, f);
741 }
742 }
743
744 Method* nmethod::attached_method(address call_instr) {
745 assert(code_contains(call_instr), "not part of the nmethod");
746 RelocIterator iter(this, call_instr, call_instr + 1);
1237
1238 _has_unsafe_access = 0;
1239 _has_wide_vectors = 0;
1240 _has_monitors = 0;
1241 _has_scoped_access = 0;
1242 _has_flushed_dependencies = 0;
1243 _is_unlinked = 0;
1244 _load_reported = 0; // jvmti state
1245
1246 _deoptimization_status = not_marked;
1247
1248 // SECT_CONSTS is first in code buffer so the offset should be 0.
1249 int consts_offset = code_buffer->total_offset_of(code_buffer->consts());
1250 assert(consts_offset == 0, "const_offset: %d", consts_offset);
1251
1252 _stub_offset = content_offset() + code_buffer->total_offset_of(code_buffer->stubs());
1253
1254 CHECKED_CAST(_entry_offset, uint16_t, (offsets->value(CodeOffsets::Entry)));
1255 CHECKED_CAST(_verified_entry_offset, uint16_t, (offsets->value(CodeOffsets::Verified_Entry)));
1256
1257 _inline_entry_point = entry_point();
1258 _verified_inline_entry_point = verified_entry_point();
1259 _verified_inline_ro_entry_point = verified_entry_point();
1260
1261 _skipped_instructions_size = code_buffer->total_skipped_instructions_size();
1262 }
1263
1264 // Post initialization
1265 void nmethod::post_init() {
1266 clear_unloading_state();
1267
1268 finalize_relocations();
1269
1270 Universe::heap()->register_nmethod(this);
1271 DEBUG_ONLY(Universe::heap()->verify_nmethod(this));
1272
1273 CodeCache::commit(this);
1274 }
1275
1276 // For native wrappers
1277 nmethod::nmethod(
1278 Method* method,
1279 CompilerType type,
1280 int nmethod_size,
1281 int compile_id,
1282 CodeOffsets* offsets,
1283 CodeBuffer* code_buffer,
1284 int frame_size,
1285 ByteSize basic_lock_owner_sp_offset,
1286 ByteSize basic_lock_sp_offset,
1287 OopMapSet* oop_maps,
1288 int mutable_data_size)
1289 : CodeBlob("native nmethod", CodeBlobKind::Nmethod, code_buffer, nmethod_size, sizeof(nmethod),
1290 offsets->value(CodeOffsets::Frame_Complete), frame_size, oop_maps, false, mutable_data_size),
1291 _deoptimization_generation(0),
1292 _gc_epoch(CodeCache::gc_epoch()),
1293 _method(method),
1294 _native_receiver_sp_offset(basic_lock_owner_sp_offset),
1295 _native_basic_lock_sp_offset(basic_lock_sp_offset)
1296 {
1297 {
1298 DEBUG_ONLY(NoSafepointVerifier nsv;)
1299 assert_locked_or_safepoint(CodeCache_lock);
1300 assert(!method->has_scalarized_args(), "scalarized native wrappers not supported yet");
1301 init_defaults(code_buffer, offsets);
1302
1303 _osr_entry_point = nullptr;
1304 _pc_desc_container = nullptr;
1305 _entry_bci = InvocationEntryBci;
1306 _compile_id = compile_id;
1307 _comp_level = CompLevel_none;
1308 _compiler_type = type;
1309 _orig_pc_offset = 0;
1310 _num_stack_arg_slots = 0;
1311
1312 if (offsets->value(CodeOffsets::Exceptions) != -1) {
1313 // Continuation enter intrinsic
1314 _exception_offset = code_offset() + offsets->value(CodeOffsets::Exceptions);
1315 } else {
1316 _exception_offset = 0;
1317 }
1318 // Native wrappers do not have deopt handlers. Make the values
1319 // something that will never match a pc like the nmethod vtable entry
1320 _deopt_handler_entry_offset = 0;
1751 _exception_offset = -1;
1752 }
1753
1754 _deopt_handler_entry_offset = _stub_offset + offsets->value(CodeOffsets::Deopt);
1755 }
1756 if (offsets->value(CodeOffsets::UnwindHandler) != -1) {
1757 // C1 generates UnwindHandler at the end of instructions section.
1758 // Calculate positive offset as distance between the start of stubs section
1759 // (which is also the end of instructions section) and the start of the handler.
1760 int unwind_handler_offset = code_offset() + offsets->value(CodeOffsets::UnwindHandler);
1761 CHECKED_CAST(_unwind_handler_offset, int16_t, (_stub_offset - unwind_handler_offset));
1762 } else {
1763 _unwind_handler_offset = -1;
1764 }
1765
1766 CHECKED_CAST(_oops_size, uint16_t, align_up(code_buffer->total_oop_size(), oopSize));
1767 uint16_t metadata_size;
1768 CHECKED_CAST(metadata_size, uint16_t, align_up(code_buffer->total_metadata_size(), wordSize));
1769 JVMCI_ONLY( _metadata_size = metadata_size; )
1770 int jvmci_data_size = 0 JVMCI_ONLY( + align_up(compiler->is_jvmci() ? jvmci_data->size() : 0, oopSize));
1771 _inline_entry_point = code_begin() + offsets->value(CodeOffsets::Inline_Entry);
1772 _verified_inline_entry_point = code_begin() + offsets->value(CodeOffsets::Verified_Inline_Entry);
1773 _verified_inline_ro_entry_point = code_begin() + offsets->value(CodeOffsets::Verified_Inline_Entry_RO);
1774
1775 assert(_mutable_data_size == _relocation_size + metadata_size + jvmci_data_size,
1776 "wrong mutable data size: %d != %d + %d + %d",
1777 _mutable_data_size, _relocation_size, metadata_size, jvmci_data_size);
1778 assert(nmethod_size == data_end() - header_begin(), "wrong nmethod size: %d != %d",
1779 nmethod_size, (int)(code_end() - header_begin()));
1780
1781 _immutable_data_size = immutable_data_size;
1782 if (immutable_data_size > 0) {
1783 assert(immutable_data != nullptr, "required");
1784 _immutable_data = immutable_data;
1785 } else {
1786 // We need unique not null address
1787 _immutable_data = blob_end();
1788 }
1789 CHECKED_CAST(_nul_chk_table_offset, uint16_t, (align_up((int)dependencies->size_in_bytes(), oopSize)));
1790 CHECKED_CAST(_handler_table_offset, uint16_t, (_nul_chk_table_offset + align_up(nul_chk_table->size_in_bytes(), oopSize)));
1791 _scopes_pcs_offset = _handler_table_offset + align_up(handler_table->size_in_bytes(), oopSize);
1792 _scopes_data_offset = _scopes_pcs_offset + adjust_pcs_size(debug_info->pcs_size());
1793
1794 #if INCLUDE_JVMCI
3200 }
3201
3202 bool nmethod::check_dependency_on(DepChange& changes) {
3203 // What has happened:
3204 // 1) a new class dependee has been added
3205 // 2) dependee and all its super classes have been marked
3206 bool found_check = false; // set true if we are upset
3207 for (Dependencies::DepStream deps(this); deps.next(); ) {
3208 // Evaluate only relevant dependencies.
3209 if (deps.spot_check_dependency_at(changes) != nullptr) {
3210 found_check = true;
3211 NOT_DEBUG(break);
3212 }
3213 }
3214 return found_check;
3215 }
3216
3217 // Called from mark_for_deoptimization, when dependee is invalidated.
3218 bool nmethod::is_dependent_on_method(Method* dependee) {
3219 for (Dependencies::DepStream deps(this); deps.next(); ) {
3220 if (Dependencies::has_method_dep(deps.type())) {
3221 Method* method = deps.method_argument(0);
3222 if (method == dependee) return true;
3223 }
3224 }
3225 return false;
3226 }
3227
3228 void nmethod_init() {
3229 // make sure you didn't forget to adjust the filler fields
3230 assert(sizeof(nmethod) % oopSize == 0, "nmethod size must be multiple of a word");
3231 }
3232
3233 // -----------------------------------------------------------------------------
3234 // Verification
3235
3236 class VerifyOopsClosure: public OopClosure {
3237 nmethod* _nm;
3238 bool _ok;
3239 public:
3240 VerifyOopsClosure(nmethod* nm) : _nm(nm), _ok(true) { }
3241 bool ok() { return _ok; }
3242 virtual void do_oop(oop* p) {
3243 if (oopDesc::is_oop_or_null(*p)) return;
4041 return st.as_string();
4042 }
4043 }
4044 }
4045 return have_one ? "other" : nullptr;
4046 }
4047
4048 // Return the last scope in (begin..end]
4049 ScopeDesc* nmethod::scope_desc_in(address begin, address end) {
4050 PcDesc* p = pc_desc_near(begin+1);
4051 if (p != nullptr && p->real_pc(this) <= end) {
4052 return new ScopeDesc(this, p);
4053 }
4054 return nullptr;
4055 }
4056
4057 const char* nmethod::nmethod_section_label(address pos) const {
4058 const char* label = nullptr;
4059 if (pos == code_begin()) label = "[Instructions begin]";
4060 if (pos == entry_point()) label = "[Entry Point]";
4061 if (pos == inline_entry_point()) label = "[Inline Entry Point]";
4062 if (pos == verified_entry_point()) label = "[Verified Entry Point]";
4063 if (pos == verified_inline_entry_point()) label = "[Verified Inline Entry Point]";
4064 if (pos == verified_inline_ro_entry_point()) label = "[Verified Inline Entry Point (RO)]";
4065 if (pos == consts_begin() && pos != insts_begin()) label = "[Constants]";
4066 // Check stub_code before checking exception_handler or deopt_handler.
4067 if (pos == this->stub_begin()) label = "[Stub Code]";
4068 if (JVMCI_ONLY(_exception_offset >= 0 &&) pos == exception_begin()) label = "[Exception Handler]";
4069 if (JVMCI_ONLY(_deopt_handler_entry_offset != -1 &&) pos == deopt_handler_entry()) label = "[Deopt Handler Entry Point]";
4070 return label;
4071 }
4072
4073 static int maybe_print_entry_label(outputStream* stream, address pos, address entry, const char* label) {
4074 if (pos == entry) {
4075 stream->bol();
4076 stream->print_cr("%s", label);
4077 return 1;
4078 } else {
4079 return 0;
4080 }
4081 }
4082
4083 void nmethod::print_nmethod_labels(outputStream* stream, address block_begin, bool print_section_labels) const {
4084 if (print_section_labels) {
4085 int n = 0;
4086 // Multiple entry points may be at the same position. Print them all.
4087 n += maybe_print_entry_label(stream, block_begin, entry_point(), "[Entry Point]");
4088 n += maybe_print_entry_label(stream, block_begin, inline_entry_point(), "[Inline Entry Point]");
4089 n += maybe_print_entry_label(stream, block_begin, verified_entry_point(), "[Verified Entry Point]");
4090 n += maybe_print_entry_label(stream, block_begin, verified_inline_entry_point(), "[Verified Inline Entry Point]");
4091 n += maybe_print_entry_label(stream, block_begin, verified_inline_ro_entry_point(), "[Verified Inline Entry Point (RO)]");
4092 if (n == 0) {
4093 const char* label = nmethod_section_label(block_begin);
4094 if (label != nullptr) {
4095 stream->bol();
4096 stream->print_cr("%s", label);
4097 }
4098 }
4099 }
4100
4101 Method* m = method();
4102 if (m == nullptr || is_osr_method()) {
4103 return;
4104 }
4105
4106 // Print the name of the method (only once)
4107 address low = MIN3(entry_point(),
4108 verified_entry_point(),
4109 inline_entry_point());
4110 // The verified inline entry point and verified inline RO entry point are not always
4111 // used. When they are unused. CodeOffsets::Verified_Inline_Entry(_RO) is -1. Hence,
4112 // the calculated entry point is smaller than the block they are offsetting into.
4113 if (verified_inline_entry_point() >= block_begin) {
4114 low = MIN2(low, verified_inline_entry_point());
4115 }
4116 if (verified_inline_ro_entry_point() >= block_begin) {
4117 low = MIN2(low, verified_inline_ro_entry_point());
4118 }
4119 assert(low != 0, "sanity");
4120 if (block_begin == low) {
4121 stream->print(" # ");
4122 m->print_value_on(stream);
4123 stream->cr();
4124 }
4125
4126 // Print the arguments for the 3 types of verified entry points
4127 CompiledEntrySignature ces(m);
4128 ces.compute_calling_conventions(false);
4129 const GrowableArray<SigEntry>* sig_cc;
4130 const VMRegPair* regs;
4131 if (block_begin == verified_entry_point()) {
4132 sig_cc = ces.sig_cc();
4133 regs = ces.regs_cc();
4134 } else if (block_begin == verified_inline_entry_point()) {
4135 sig_cc = ces.sig();
4136 regs = ces.regs();
4137 } else if (block_begin == verified_inline_ro_entry_point()) {
4138 sig_cc = ces.sig_cc_ro();
4139 regs = ces.regs_cc_ro();
4140 } else {
4141 return;
4142 }
4143
4144 bool has_this = !m->is_static();
4145 if (ces.has_inline_recv() && block_begin == verified_entry_point()) {
4146 // <this> argument is scalarized for verified_entry_point()
4147 has_this = false;
4148 }
4149 const char* spname = "sp"; // make arch-specific?
4150 int stack_slot_offset = this->frame_size() * wordSize;
4151 int tab1 = 14, tab2 = 24;
4152 int sig_index = 0;
4153 int arg_index = has_this ? -1 : 0;
4154 bool did_old_sp = false;
4155 for (ExtendedSignature sig = ExtendedSignature(sig_cc, SigEntryFilter()); !sig.at_end(); ++sig) {
4156 bool at_this = (arg_index == -1);
4157 bool at_old_sp = false;
4158 BasicType t = (*sig)._bt;
4159 if (at_this) {
4160 stream->print(" # this: ");
4161 } else {
4162 stream->print(" # parm%d: ", arg_index);
4163 }
4164 stream->move_to(tab1);
4165 VMReg fst = regs[sig_index].first();
4166 VMReg snd = regs[sig_index].second();
4167 if (fst->is_reg()) {
4168 stream->print("%s", fst->name());
4169 if (snd->is_valid()) {
4170 stream->print(":%s", snd->name());
4171 }
4172 } else if (fst->is_stack()) {
4173 int offset = fst->reg2stack() * VMRegImpl::stack_slot_size + stack_slot_offset;
4174 if (offset == stack_slot_offset) at_old_sp = true;
4175 stream->print("[%s+0x%x]", spname, offset);
4176 } else {
4177 stream->print("reg%d:%d??", (int)(intptr_t)fst, (int)(intptr_t)snd);
4178 }
4179 stream->print(" ");
4180 stream->move_to(tab2);
4181 stream->print("= ");
4182 if (at_this) {
4183 m->method_holder()->print_value_on(stream);
4184 } else {
4185 bool did_name = false;
4186 if (is_reference_type(t)) {
4187 Symbol* name = (*sig)._name;
4188 name->print_value_on(stream);
4189 did_name = true;
4190 }
4191 if (!did_name)
4192 stream->print("%s", type2name(t));
4193 if ((*sig)._null_marker) {
4194 stream->print(" (null marker)");
4195 }
4196 }
4197 if (at_old_sp) {
4198 stream->print(" (%s of caller)", spname);
4199 did_old_sp = true;
4200 }
4201 stream->cr();
4202 sig_index += type2size[t];
4203 arg_index += 1;
4204 }
4205 if (!did_old_sp) {
4206 stream->print(" # ");
4207 stream->move_to(tab1);
4208 stream->print("[%s+0x%x]", spname, stack_slot_offset);
4209 stream->print(" (%s of caller)", spname);
4210 stream->cr();
4211 }
4212 }
4213
4214 // Returns whether this nmethod has code comments.
4215 bool nmethod::has_code_comment(address begin, address end) {
4216 // scopes?
4217 ScopeDesc* sd = scope_desc_in(begin, end);
4218 if (sd != nullptr) return true;
4219
4220 // relocations?
4221 const char* str = reloc_string_for(begin, end);
4222 if (str != nullptr) return true;
4223
4224 // implicit exceptions?
4225 int cont_offset = ImplicitExceptionTable(this).continuation_offset((uint)(begin - code_begin()));
4226 if (cont_offset != 0) return true;
4227
4228 return false;
4229 }
4230
4314 else
4315 st->print("<UNKNOWN>");
4316 break;
4317 }
4318 case Bytecodes::_getfield:
4319 case Bytecodes::_putfield:
4320 case Bytecodes::_getstatic:
4321 case Bytecodes::_putstatic:
4322 {
4323 Bytecode_field field(methodHandle(thread, sd->method()), sd->bci());
4324 st->print(" ");
4325 if (field.name() != nullptr)
4326 field.name()->print_symbol_on(st);
4327 else
4328 st->print("<UNKNOWN>");
4329 }
4330 default:
4331 break;
4332 }
4333 }
4334 st->print(" {reexecute=%d rethrow=%d return_oop=%d return_scalarized=%d}", sd->should_reexecute(), sd->rethrow_exception(), sd->return_oop(), sd->return_scalarized());
4335 }
4336
4337 // Print all scopes
4338 for (;sd != nullptr; sd = sd->sender()) {
4339 st->move_to(column, 6, 0);
4340 st->print("; -");
4341 if (sd->should_reexecute()) {
4342 st->print(" (reexecute)");
4343 }
4344 if (sd->method() == nullptr) {
4345 st->print("method is nullptr");
4346 } else {
4347 sd->method()->print_short_name(st);
4348 }
4349 int lineno = sd->method()->line_number_from_bci(sd->bci());
4350 if (lineno != -1) {
4351 st->print("@%d (line %d)", sd->bci(), lineno);
4352 } else {
4353 st->print("@%d", sd->bci());
4354 }
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