30 #include "code/vtableStubs.hpp"
31 #include "interp_masm_aarch64.hpp"
32 #include "memory/resourceArea.hpp"
33 #include "oops/instanceKlass.hpp"
34 #include "oops/klassVtable.hpp"
35 #include "runtime/sharedRuntime.hpp"
36 #include "vmreg_aarch64.inline.hpp"
37 #ifdef COMPILER2
38 #include "opto/runtime.hpp"
39 #endif
40
41 // machine-dependent part of VtableStubs: create VtableStub of correct size and
42 // initialize its code
43
44 #define __ masm->
45
46 #ifndef PRODUCT
47 extern "C" void bad_compiled_vtable_index(JavaThread* thread, oop receiver, int index);
48 #endif
49
50 VtableStub* VtableStubs::create_vtable_stub(int vtable_index) {
51 // Read "A word on VtableStub sizing" in share/code/vtableStubs.hpp for details on stub sizing.
52 const int stub_code_length = code_size_limit(true);
53 VtableStub* s = new(stub_code_length) VtableStub(true, vtable_index);
54 // Can be null if there is no free space in the code cache.
55 if (s == nullptr) {
56 return nullptr;
57 }
58
59 // Count unused bytes in instruction sequences of variable size.
60 // We add them to the computed buffer size in order to avoid
61 // overflow in subsequently generated stubs.
62 address start_pc;
63 int slop_bytes = 0;
64 int slop_delta = 0;
65
66 ResourceMark rm;
67 CodeBuffer cb(s->entry_point(), stub_code_length);
68 MacroAssembler* masm = new MacroAssembler(&cb);
69
70 #if (!defined(PRODUCT) && defined(COMPILER2))
71 if (CountCompiledCalls) {
72 __ lea(r16, ExternalAddress((address) SharedRuntime::nof_megamorphic_calls_addr()));
73 __ increment(Address(r16));
74 }
75 #endif
76
77 // get receiver (need to skip return address on top of stack)
78 assert(VtableStub::receiver_location() == j_rarg0->as_VMReg(), "receiver expected in j_rarg0");
79
80 // get receiver klass
81 address npe_addr = __ pc();
82 __ load_klass(r16, j_rarg0);
83
84 #ifndef PRODUCT
85 if (DebugVtables) {
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 == nullptr) {
146 return nullptr;
147 }
148
149 // Count unused bytes in instruction sequences of variable size.
150 // We add them to the computed buffer size in order to avoid
151 // overflow in subsequently generated stubs.
152 address start_pc;
153 int slop_bytes = 0;
154 int slop_delta = 0;
155
156 ResourceMark rm;
157 CodeBuffer cb(s->entry_point(), stub_code_length);
158 MacroAssembler* masm = new MacroAssembler(&cb);
159
160 #if (!defined(PRODUCT) && defined(COMPILER2))
161 if (CountCompiledCalls) {
162 __ lea(r10, ExternalAddress((address) SharedRuntime::nof_megamorphic_calls_addr()));
163 __ increment(Address(r10));
164 }
165 #endif
166
167 // get receiver (need to skip return address on top of stack)
168 assert(VtableStub::receiver_location() == j_rarg0->as_VMReg(), "receiver expected in j_rarg0");
169
170 // Entry arguments:
171 // rscratch2: CompiledICData
172 // j_rarg0: Receiver
173
174 // This stub is called from compiled code which has no callee-saved registers,
175 // so all registers except arguments are free at this point.
190 // get receiver klass (also an implicit null-check)
191 address npe_addr = __ pc();
192 __ load_klass(recv_klass_reg, j_rarg0);
193
194 // Receiver subtype check against REFC.
195 // Get selected method from declaring class and itable index
196 __ lookup_interface_method_stub(recv_klass_reg, holder_klass_reg, resolved_klass_reg, rmethod,
197 temp_reg, temp_reg2, itable_index, L_no_such_interface);
198
199 // Reduce "estimate" such that "padding" does not drop below 8.
200 const ptrdiff_t estimate = AOTCodeCache::is_on_for_dump() ? 148 : 144;
201 const ptrdiff_t codesize = __ pc() - start_pc;
202 slop_delta = (int)(estimate - codesize);
203 slop_bytes += slop_delta;
204 assert(slop_delta >= 0, "itable #%d: Code size estimate (%d) for lookup_interface_method too small, required: %d", itable_index, (int)estimate, (int)codesize);
205
206 #ifdef ASSERT
207 if (DebugVtables) {
208 Label L2;
209 __ cbz(rmethod, L2);
210 __ ldr(rscratch1, Address(rmethod, Method::from_compiled_offset()));
211 __ cbnz(rscratch1, L2);
212 __ stop("compiler entrypoint is null");
213 __ bind(L2);
214 }
215 #endif // ASSERT
216
217 // rmethod: Method*
218 // j_rarg0: receiver
219 address ame_addr = __ pc();
220 __ ldr(rscratch1, Address(rmethod, Method::from_compiled_offset()));
221 __ br(rscratch1);
222
223 __ bind(L_no_such_interface);
224 // Handle IncompatibleClassChangeError in itable stubs.
225 // More detailed error message.
226 // We force resolving of the call site by jumping to the "handle
227 // wrong method" stub, and so let the interpreter runtime do all the
228 // dirty work.
229 assert(SharedRuntime::get_handle_wrong_method_stub() != nullptr, "check initialization order");
230 __ far_jump(RuntimeAddress(SharedRuntime::get_handle_wrong_method_stub()));
231
232 masm->flush();
233 bookkeeping(masm, tty, s, npe_addr, ame_addr, false, itable_index, slop_bytes, 0);
234
235 return s;
236 }
237
238 int VtableStub::pd_code_alignment() {
239 // aarch64 cache line size is not an architected constant. We just align on 4 bytes (instruction size).
240 const unsigned int icache_line_size = 4;
|
30 #include "code/vtableStubs.hpp"
31 #include "interp_masm_aarch64.hpp"
32 #include "memory/resourceArea.hpp"
33 #include "oops/instanceKlass.hpp"
34 #include "oops/klassVtable.hpp"
35 #include "runtime/sharedRuntime.hpp"
36 #include "vmreg_aarch64.inline.hpp"
37 #ifdef COMPILER2
38 #include "opto/runtime.hpp"
39 #endif
40
41 // machine-dependent part of VtableStubs: create VtableStub of correct size and
42 // initialize its code
43
44 #define __ masm->
45
46 #ifndef PRODUCT
47 extern "C" void bad_compiled_vtable_index(JavaThread* thread, oop receiver, int index);
48 #endif
49
50 VtableStub* VtableStubs::create_vtable_stub(int vtable_index, bool caller_is_c1) {
51 // Read "A word on VtableStub sizing" in share/code/vtableStubs.hpp for details on stub sizing.
52 const int stub_code_length = code_size_limit(true);
53 VtableStub* s = new(stub_code_length) VtableStub(true, vtable_index, caller_is_c1);
54 // Can be null if there is no free space in the code cache.
55 if (s == nullptr) {
56 return nullptr;
57 }
58
59 // Count unused bytes in instruction sequences of variable size.
60 // We add them to the computed buffer size in order to avoid
61 // overflow in subsequently generated stubs.
62 address start_pc;
63 int slop_bytes = 0;
64 int slop_delta = 0;
65
66 ByteSize entry_offset = caller_is_c1 ? Method::from_compiled_inline_offset() : Method::from_compiled_inline_ro_offset();
67
68 ResourceMark rm;
69 CodeBuffer cb(s->entry_point(), stub_code_length);
70 MacroAssembler* masm = new MacroAssembler(&cb);
71
72 #if (!defined(PRODUCT) && defined(COMPILER2))
73 if (CountCompiledCalls) {
74 __ lea(r16, ExternalAddress((address) SharedRuntime::nof_megamorphic_calls_addr()));
75 __ increment(Address(r16));
76 }
77 #endif
78
79 // get receiver (need to skip return address on top of stack)
80 assert(VtableStub::receiver_location() == j_rarg0->as_VMReg(), "receiver expected in j_rarg0");
81
82 // get receiver klass
83 address npe_addr = __ pc();
84 __ load_klass(r16, j_rarg0);
85
86 #ifndef PRODUCT
87 if (DebugVtables) {
101 const ptrdiff_t codesize = __ pc() - start_pc;
102 slop_delta = estimate - codesize; // call_VM varies in length, depending on data
103 slop_bytes += slop_delta;
104 assert(slop_delta >= 0, "vtable #%d: Code size estimate (%d) for DebugVtables too small, required: %d", vtable_index, (int)estimate, (int)codesize);
105
106 __ leave();
107 __ bind(L);
108 }
109 #endif // PRODUCT
110
111 start_pc = __ pc();
112 __ lookup_virtual_method(r16, vtable_index, rmethod);
113 slop_delta = 8 - (int)(__ pc() - start_pc);
114 slop_bytes += slop_delta;
115 assert(slop_delta >= 0, "negative slop(%d) encountered, adjust code size estimate!", slop_delta);
116
117 #ifndef PRODUCT
118 if (DebugVtables) {
119 Label L;
120 __ cbz(rmethod, L);
121 __ ldr(rscratch1, Address(rmethod, entry_offset));
122 __ cbnz(rscratch1, L);
123 __ stop("Vtable entry is null");
124 __ bind(L);
125 }
126 #endif // PRODUCT
127
128 // r0: receiver klass
129 // rmethod: Method*
130 // r2: receiver
131 address ame_addr = __ pc();
132 __ ldr(rscratch1, Address(rmethod, entry_offset));
133 __ br(rscratch1);
134
135 masm->flush();
136 bookkeeping(masm, tty, s, npe_addr, ame_addr, true, vtable_index, slop_bytes, 0);
137
138 return s;
139 }
140
141
142 VtableStub* VtableStubs::create_itable_stub(int itable_index, bool caller_is_c1) {
143 // Read "A word on VtableStub sizing" in share/code/vtableStubs.hpp for details on stub sizing.
144 const int stub_code_length = code_size_limit(false);
145 VtableStub* s = new(stub_code_length) VtableStub(false, itable_index, caller_is_c1);
146 // Can be null if there is no free space in the code cache.
147 if (s == nullptr) {
148 return nullptr;
149 }
150
151 // Count unused bytes in instruction sequences of variable size.
152 // We add them to the computed buffer size in order to avoid
153 // overflow in subsequently generated stubs.
154 address start_pc;
155 int slop_bytes = 0;
156 int slop_delta = 0;
157
158 ByteSize entry_offset = caller_is_c1 ? Method::from_compiled_inline_offset() : Method::from_compiled_inline_ro_offset();
159
160 ResourceMark rm;
161 CodeBuffer cb(s->entry_point(), stub_code_length);
162 MacroAssembler* masm = new MacroAssembler(&cb);
163
164 #if (!defined(PRODUCT) && defined(COMPILER2))
165 if (CountCompiledCalls) {
166 __ lea(r10, ExternalAddress((address) SharedRuntime::nof_megamorphic_calls_addr()));
167 __ increment(Address(r10));
168 }
169 #endif
170
171 // get receiver (need to skip return address on top of stack)
172 assert(VtableStub::receiver_location() == j_rarg0->as_VMReg(), "receiver expected in j_rarg0");
173
174 // Entry arguments:
175 // rscratch2: CompiledICData
176 // j_rarg0: Receiver
177
178 // This stub is called from compiled code which has no callee-saved registers,
179 // so all registers except arguments are free at this point.
194 // get receiver klass (also an implicit null-check)
195 address npe_addr = __ pc();
196 __ load_klass(recv_klass_reg, j_rarg0);
197
198 // Receiver subtype check against REFC.
199 // Get selected method from declaring class and itable index
200 __ lookup_interface_method_stub(recv_klass_reg, holder_klass_reg, resolved_klass_reg, rmethod,
201 temp_reg, temp_reg2, itable_index, L_no_such_interface);
202
203 // Reduce "estimate" such that "padding" does not drop below 8.
204 const ptrdiff_t estimate = AOTCodeCache::is_on_for_dump() ? 148 : 144;
205 const ptrdiff_t codesize = __ pc() - start_pc;
206 slop_delta = (int)(estimate - codesize);
207 slop_bytes += slop_delta;
208 assert(slop_delta >= 0, "itable #%d: Code size estimate (%d) for lookup_interface_method too small, required: %d", itable_index, (int)estimate, (int)codesize);
209
210 #ifdef ASSERT
211 if (DebugVtables) {
212 Label L2;
213 __ cbz(rmethod, L2);
214 __ ldr(rscratch1, Address(rmethod, entry_offset));
215 __ cbnz(rscratch1, L2);
216 __ stop("compiler entrypoint is null");
217 __ bind(L2);
218 }
219 #endif // ASSERT
220
221 // rmethod: Method*
222 // j_rarg0: receiver
223 address ame_addr = __ pc();
224 __ ldr(rscratch1, Address(rmethod, entry_offset));
225 __ br(rscratch1);
226
227 __ bind(L_no_such_interface);
228 // Handle IncompatibleClassChangeError in itable stubs.
229 // More detailed error message.
230 // We force resolving of the call site by jumping to the "handle
231 // wrong method" stub, and so let the interpreter runtime do all the
232 // dirty work.
233 assert(SharedRuntime::get_handle_wrong_method_stub() != nullptr, "check initialization order");
234 __ far_jump(RuntimeAddress(SharedRuntime::get_handle_wrong_method_stub()));
235
236 masm->flush();
237 bookkeeping(masm, tty, s, npe_addr, ame_addr, false, itable_index, slop_bytes, 0);
238
239 return s;
240 }
241
242 int VtableStub::pd_code_alignment() {
243 // aarch64 cache line size is not an architected constant. We just align on 4 bytes (instruction size).
244 const unsigned int icache_line_size = 4;
|