96 __ lookup_virtual_method(rax, vtable_index, method);
97
98 if (DebugVtables) {
99 Label L;
100 __ cmpptr(method, (int32_t)NULL_WORD);
101 __ jcc(Assembler::equal, L);
102 __ cmpptr(Address(method, Method::from_compiled_offset()), (int32_t)NULL_WORD);
103 __ jcc(Assembler::notZero, L);
104 __ stop("Vtable entry is NULL");
105 __ bind(L);
106 }
107 // rax: receiver klass
108 // rbx: Method*
109 // rcx: receiver
110 address ame_addr = __ pc();
111 __ jmp( Address(rbx, Method::from_compiled_offset()));
112
113 __ flush();
114
115 if (PrintMiscellaneous && (WizardMode || Verbose)) {
116 tty->print_cr("vtable #%d at "PTR_FORMAT"[%d] left over: %d",
117 vtable_index, s->entry_point(),
118 (int)(s->code_end() - s->entry_point()),
119 (int)(s->code_end() - __ pc()));
120 }
121 guarantee(__ pc() <= s->code_end(), "overflowed buffer");
122 // shut the door on sizing bugs
123 int slop = 3; // 32-bit offset is this much larger than an 8-bit one
124 assert(vtable_index > 10 || __ pc() + slop <= s->code_end(), "room for 32-bit offset");
125
126 s->set_exception_points(npe_addr, ame_addr);
127 return s;
128 }
129
130
131 VtableStub* VtableStubs::create_itable_stub(int itable_index) {
132 // Note well: pd_code_size_limit is the absolute minimum we can get
133 // away with. If you add code here, bump the code stub size
134 // returned by pd_code_size_limit!
135 const int amd64_code_length = VtableStub::pd_code_size_limit(false);
136 VtableStub* s = new(amd64_code_length) VtableStub(false, itable_index);
203 __ cmpptr(method, (int32_t)NULL_WORD);
204 __ jcc(Assembler::equal, L2);
205 __ cmpptr(Address(method, Method::from_compiled_offset()), (int32_t)NULL_WORD);
206 __ jcc(Assembler::notZero, L2);
207 __ stop("compiler entrypoint is null");
208 __ bind(L2);
209 }
210 #endif // ASSERT
211
212 // rbx: Method*
213 // j_rarg0: receiver
214 address ame_addr = __ pc();
215 __ jmp(Address(method, Method::from_compiled_offset()));
216
217 __ bind(L_no_such_interface);
218 __ jump(RuntimeAddress(StubRoutines::throw_IncompatibleClassChangeError_entry()));
219
220 __ flush();
221
222 if (PrintMiscellaneous && (WizardMode || Verbose)) {
223 tty->print_cr("itable #%d at "PTR_FORMAT"[%d] left over: %d",
224 itable_index, s->entry_point(),
225 (int)(s->code_end() - s->entry_point()),
226 (int)(s->code_end() - __ pc()));
227 }
228 guarantee(__ pc() <= s->code_end(), "overflowed buffer");
229 // shut the door on sizing bugs
230 int slop = 3; // 32-bit offset is this much larger than an 8-bit one
231 assert(itable_index > 10 || __ pc() + slop <= s->code_end(), "room for 32-bit offset");
232
233 s->set_exception_points(npe_addr, ame_addr);
234 return s;
235 }
236
237 int VtableStub::pd_code_size_limit(bool is_vtable_stub) {
238 if (is_vtable_stub) {
239 // Vtable stub size
240 return (DebugVtables ? 512 : 24) + (CountCompiledCalls ? 13 : 0) +
241 (UseCompressedClassPointers ? MacroAssembler::instr_size_for_decode_klass_not_null() : 0);
242 } else {
243 // Itable stub size
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96 __ lookup_virtual_method(rax, vtable_index, method);
97
98 if (DebugVtables) {
99 Label L;
100 __ cmpptr(method, (int32_t)NULL_WORD);
101 __ jcc(Assembler::equal, L);
102 __ cmpptr(Address(method, Method::from_compiled_offset()), (int32_t)NULL_WORD);
103 __ jcc(Assembler::notZero, L);
104 __ stop("Vtable entry is NULL");
105 __ bind(L);
106 }
107 // rax: receiver klass
108 // rbx: Method*
109 // rcx: receiver
110 address ame_addr = __ pc();
111 __ jmp( Address(rbx, Method::from_compiled_offset()));
112
113 __ flush();
114
115 if (PrintMiscellaneous && (WizardMode || Verbose)) {
116 tty->print_cr("vtable #%d at " PTR_FORMAT "[%d] left over: %d",
117 vtable_index, s->entry_point(),
118 (int)(s->code_end() - s->entry_point()),
119 (int)(s->code_end() - __ pc()));
120 }
121 guarantee(__ pc() <= s->code_end(), "overflowed buffer");
122 // shut the door on sizing bugs
123 int slop = 3; // 32-bit offset is this much larger than an 8-bit one
124 assert(vtable_index > 10 || __ pc() + slop <= s->code_end(), "room for 32-bit offset");
125
126 s->set_exception_points(npe_addr, ame_addr);
127 return s;
128 }
129
130
131 VtableStub* VtableStubs::create_itable_stub(int itable_index) {
132 // Note well: pd_code_size_limit is the absolute minimum we can get
133 // away with. If you add code here, bump the code stub size
134 // returned by pd_code_size_limit!
135 const int amd64_code_length = VtableStub::pd_code_size_limit(false);
136 VtableStub* s = new(amd64_code_length) VtableStub(false, itable_index);
203 __ cmpptr(method, (int32_t)NULL_WORD);
204 __ jcc(Assembler::equal, L2);
205 __ cmpptr(Address(method, Method::from_compiled_offset()), (int32_t)NULL_WORD);
206 __ jcc(Assembler::notZero, L2);
207 __ stop("compiler entrypoint is null");
208 __ bind(L2);
209 }
210 #endif // ASSERT
211
212 // rbx: Method*
213 // j_rarg0: receiver
214 address ame_addr = __ pc();
215 __ jmp(Address(method, Method::from_compiled_offset()));
216
217 __ bind(L_no_such_interface);
218 __ jump(RuntimeAddress(StubRoutines::throw_IncompatibleClassChangeError_entry()));
219
220 __ flush();
221
222 if (PrintMiscellaneous && (WizardMode || Verbose)) {
223 tty->print_cr("itable #%d at " PTR_FORMAT "[%d] left over: %d",
224 itable_index, s->entry_point(),
225 (int)(s->code_end() - s->entry_point()),
226 (int)(s->code_end() - __ pc()));
227 }
228 guarantee(__ pc() <= s->code_end(), "overflowed buffer");
229 // shut the door on sizing bugs
230 int slop = 3; // 32-bit offset is this much larger than an 8-bit one
231 assert(itable_index > 10 || __ pc() + slop <= s->code_end(), "room for 32-bit offset");
232
233 s->set_exception_points(npe_addr, ame_addr);
234 return s;
235 }
236
237 int VtableStub::pd_code_size_limit(bool is_vtable_stub) {
238 if (is_vtable_stub) {
239 // Vtable stub size
240 return (DebugVtables ? 512 : 24) + (CountCompiledCalls ? 13 : 0) +
241 (UseCompressedClassPointers ? MacroAssembler::instr_size_for_decode_klass_not_null() : 0);
242 } else {
243 // Itable stub size
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