93 Label L;
94 __ br_notnull_short(G5_method, Assembler::pt, L);
95 __ stop("Vtable entry is ZERO");
96 __ bind(L);
97 }
98 #endif
99
100 address ame_addr = __ pc(); // if the vtable entry is null, the method is abstract
101 // NOTE: for vtable dispatches, the vtable entry will never be null.
102
103 __ ld_ptr(G5_method, in_bytes(Method::from_compiled_offset()), G3_scratch);
104
105 // jump to target (either compiled code or c2iadapter)
106 __ JMP(G3_scratch, 0);
107 // load Method* (in case we call c2iadapter)
108 __ delayed()->nop();
109
110 masm->flush();
111
112 if (PrintMiscellaneous && (WizardMode || Verbose)) {
113 tty->print_cr("vtable #%d at "PTR_FORMAT"[%d] left over: %d",
114 vtable_index, p2i(s->entry_point()),
115 (int)(s->code_end() - s->entry_point()),
116 (int)(s->code_end() - __ pc()));
117 }
118 guarantee(__ pc() <= s->code_end(), "overflowed buffer");
119 // shut the door on sizing bugs
120 int slop = 2*BytesPerInstWord; // 32-bit offset is this much larger than a 13-bit one
121 assert(vtable_index > 10 || __ pc() + slop <= s->code_end(), "room for sethi;add");
122
123 s->set_exception_points(npe_addr, ame_addr);
124 return s;
125 }
126
127
128 // NOTE: %%%% if any change is made to this stub make sure that the function
129 // pd_code_size_limit is changed to ensure the correct size for VtableStub
130 VtableStub* VtableStubs::create_itable_stub(int itable_index) {
131 const int sparc_code_length = VtableStub::pd_code_size_limit(false);
132 VtableStub* s = new(sparc_code_length) VtableStub(false, itable_index);
133 // Can be NULL if there is no free space in the code cache.
188 __ restore(L5_method, 0, G5_method);
189 // Restore registers *before* the AME point.
190
191 address ame_addr = __ pc(); // if the vtable entry is null, the method is abstract
192 __ ld_ptr(G5_method, in_bytes(Method::from_compiled_offset()), G3_scratch);
193
194 // G5_method: Method*
195 // O0: Receiver
196 // G3_scratch: entry point
197 __ JMP(G3_scratch, 0);
198 __ delayed()->nop();
199
200 __ bind(throw_icce);
201 AddressLiteral icce(StubRoutines::throw_IncompatibleClassChangeError_entry());
202 __ jump_to(icce, G3_scratch);
203 __ delayed()->restore();
204
205 masm->flush();
206
207 if (PrintMiscellaneous && (WizardMode || Verbose)) {
208 tty->print_cr("itable #%d at "PTR_FORMAT"[%d] left over: %d",
209 itable_index, p2i(s->entry_point()),
210 (int)(s->code_end() - s->entry_point()),
211 (int)(s->code_end() - __ pc()));
212 }
213 guarantee(__ pc() <= s->code_end(), "overflowed buffer");
214 // shut the door on sizing bugs
215 int slop = 2*BytesPerInstWord; // 32-bit offset is this much larger than a 13-bit one
216 assert(itable_index > 10 || __ pc() + slop <= s->code_end(), "room for sethi;add");
217
218 s->set_exception_points(npe_addr, ame_addr);
219 return s;
220 }
221
222
223 int VtableStub::pd_code_size_limit(bool is_vtable_stub) {
224 if (TraceJumps || DebugVtables || CountCompiledCalls || VerifyOops) return 1000;
225 else {
226 const int slop = 2*BytesPerInstWord; // sethi;add (needed for long offsets)
227 if (is_vtable_stub) {
228 // ld;ld;ld,jmp,nop
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93 Label L;
94 __ br_notnull_short(G5_method, Assembler::pt, L);
95 __ stop("Vtable entry is ZERO");
96 __ bind(L);
97 }
98 #endif
99
100 address ame_addr = __ pc(); // if the vtable entry is null, the method is abstract
101 // NOTE: for vtable dispatches, the vtable entry will never be null.
102
103 __ ld_ptr(G5_method, in_bytes(Method::from_compiled_offset()), G3_scratch);
104
105 // jump to target (either compiled code or c2iadapter)
106 __ JMP(G3_scratch, 0);
107 // load Method* (in case we call c2iadapter)
108 __ delayed()->nop();
109
110 masm->flush();
111
112 if (PrintMiscellaneous && (WizardMode || Verbose)) {
113 tty->print_cr("vtable #%d at " PTR_FORMAT "[%d] left over: %d",
114 vtable_index, p2i(s->entry_point()),
115 (int)(s->code_end() - s->entry_point()),
116 (int)(s->code_end() - __ pc()));
117 }
118 guarantee(__ pc() <= s->code_end(), "overflowed buffer");
119 // shut the door on sizing bugs
120 int slop = 2*BytesPerInstWord; // 32-bit offset is this much larger than a 13-bit one
121 assert(vtable_index > 10 || __ pc() + slop <= s->code_end(), "room for sethi;add");
122
123 s->set_exception_points(npe_addr, ame_addr);
124 return s;
125 }
126
127
128 // NOTE: %%%% if any change is made to this stub make sure that the function
129 // pd_code_size_limit is changed to ensure the correct size for VtableStub
130 VtableStub* VtableStubs::create_itable_stub(int itable_index) {
131 const int sparc_code_length = VtableStub::pd_code_size_limit(false);
132 VtableStub* s = new(sparc_code_length) VtableStub(false, itable_index);
133 // Can be NULL if there is no free space in the code cache.
188 __ restore(L5_method, 0, G5_method);
189 // Restore registers *before* the AME point.
190
191 address ame_addr = __ pc(); // if the vtable entry is null, the method is abstract
192 __ ld_ptr(G5_method, in_bytes(Method::from_compiled_offset()), G3_scratch);
193
194 // G5_method: Method*
195 // O0: Receiver
196 // G3_scratch: entry point
197 __ JMP(G3_scratch, 0);
198 __ delayed()->nop();
199
200 __ bind(throw_icce);
201 AddressLiteral icce(StubRoutines::throw_IncompatibleClassChangeError_entry());
202 __ jump_to(icce, G3_scratch);
203 __ delayed()->restore();
204
205 masm->flush();
206
207 if (PrintMiscellaneous && (WizardMode || Verbose)) {
208 tty->print_cr("itable #%d at " PTR_FORMAT "[%d] left over: %d",
209 itable_index, p2i(s->entry_point()),
210 (int)(s->code_end() - s->entry_point()),
211 (int)(s->code_end() - __ pc()));
212 }
213 guarantee(__ pc() <= s->code_end(), "overflowed buffer");
214 // shut the door on sizing bugs
215 int slop = 2*BytesPerInstWord; // 32-bit offset is this much larger than a 13-bit one
216 assert(itable_index > 10 || __ pc() + slop <= s->code_end(), "room for sethi;add");
217
218 s->set_exception_points(npe_addr, ame_addr);
219 return s;
220 }
221
222
223 int VtableStub::pd_code_size_limit(bool is_vtable_stub) {
224 if (TraceJumps || DebugVtables || CountCompiledCalls || VerifyOops) return 1000;
225 else {
226 const int slop = 2*BytesPerInstWord; // sethi;add (needed for long offsets)
227 if (is_vtable_stub) {
228 // ld;ld;ld,jmp,nop
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