99 const ptrdiff_t codesize = __ pc() - start_pc;
100 slop_delta = estimate - codesize; // call_VM varies in length, depending on data
101 slop_bytes += slop_delta;
102 assert(slop_delta >= 0, "vtable #%d: Code size estimate (%d) for DebugVtables too small, required: %d", vtable_index, (int)estimate, (int)codesize);
103
104 __ leave();
105 __ bind(L);
106 }
107 #endif // PRODUCT
108
109 start_pc = __ pc();
110 __ lookup_virtual_method(r16, vtable_index, rmethod);
111 slop_delta = 8 - (int)(__ pc() - start_pc);
112 slop_bytes += slop_delta;
113 assert(slop_delta >= 0, "negative slop(%d) encountered, adjust code size estimate!", slop_delta);
114
115 #ifndef PRODUCT
116 if (DebugVtables) {
117 Label L;
118 __ cbz(rmethod, L);
119 __ ldr(rscratch1, Address(rmethod, Method::from_compiled_offset()));
120 __ cbnz(rscratch1, L);
121 __ stop("Vtable entry is NULL");
122 __ bind(L);
123 }
124 #endif // PRODUCT
125
126 // r0: receiver klass
127 // rmethod: Method*
128 // r2: receiver
129 address ame_addr = __ pc();
130 __ ldr(rscratch1, Address(rmethod, Method::from_compiled_offset()));
131 __ br(rscratch1);
132
133 masm->flush();
134 bookkeeping(masm, tty, s, npe_addr, ame_addr, true, vtable_index, slop_bytes, 0);
135
136 return s;
137 }
138
139
140 VtableStub* VtableStubs::create_itable_stub(int itable_index) {
141 // Read "A word on VtableStub sizing" in share/code/vtableStubs.hpp for details on stub sizing.
142 const int stub_code_length = code_size_limit(false);
143 VtableStub* s = new(stub_code_length) VtableStub(false, itable_index);
144 // Can be NULL if there is no free space in the code cache.
145 if (s == NULL) {
146 return NULL;
147 }
148 // Count unused bytes in instruction sequences of variable size.
149 // We add them to the computed buffer size in order to avoid
150 // overflow in subsequently generated stubs.
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99 const ptrdiff_t codesize = __ pc() - start_pc;
100 slop_delta = estimate - codesize; // call_VM varies in length, depending on data
101 slop_bytes += slop_delta;
102 assert(slop_delta >= 0, "vtable #%d: Code size estimate (%d) for DebugVtables too small, required: %d", vtable_index, (int)estimate, (int)codesize);
103
104 __ leave();
105 __ bind(L);
106 }
107 #endif // PRODUCT
108
109 start_pc = __ pc();
110 __ lookup_virtual_method(r16, vtable_index, rmethod);
111 slop_delta = 8 - (int)(__ pc() - start_pc);
112 slop_bytes += slop_delta;
113 assert(slop_delta >= 0, "negative slop(%d) encountered, adjust code size estimate!", slop_delta);
114
115 #ifndef PRODUCT
116 if (DebugVtables) {
117 Label L;
118 __ cbz(rmethod, L);
119 __ ldr(rscratch1, Address(rmethod, Method::from_compiled_value_ro_offset()));
120 __ cbnz(rscratch1, L);
121 __ stop("Vtable entry is NULL");
122 __ bind(L);
123 }
124 #endif // PRODUCT
125
126 // r0: receiver klass
127 // rmethod: Method*
128 // r2: receiver
129 address ame_addr = __ pc();
130 __ ldr(rscratch1, Address(rmethod, Method::from_compiled_value_ro_offset()));
131 __ br(rscratch1);
132
133 masm->flush();
134 bookkeeping(masm, tty, s, npe_addr, ame_addr, true, vtable_index, slop_bytes, 0);
135
136 return s;
137 }
138
139
140 VtableStub* VtableStubs::create_itable_stub(int itable_index) {
141 // Read "A word on VtableStub sizing" in share/code/vtableStubs.hpp for details on stub sizing.
142 const int stub_code_length = code_size_limit(false);
143 VtableStub* s = new(stub_code_length) VtableStub(false, itable_index);
144 // Can be NULL if there is no free space in the code cache.
145 if (s == NULL) {
146 return NULL;
147 }
148 // Count unused bytes in instruction sequences of variable size.
149 // We add them to the computed buffer size in order to avoid
150 // overflow in subsequently generated stubs.
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