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comparison src/cpu/x86/vm/methodHandles_x86.cpp @ 1793:d257356e35f0

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6939224: MethodHandle.invokeGeneric needs to perform the correct set of conversions Reviewed-by: never
author jrose
date Mon, 13 Sep 2010 23:24:30 -0700
parents c18cbe5936b8
children c93c652551b5 b6aedd1acdc0
comparison
equal deleted inserted replaced
1792:d20603ee9e10 1793:d257356e35f0
25 #include "incls/_precompiled.incl" 25 #include "incls/_precompiled.incl"
26 #include "incls/_methodHandles_x86.cpp.incl" 26 #include "incls/_methodHandles_x86.cpp.incl"
27 27
28 #define __ _masm-> 28 #define __ _masm->
29 29
30 #ifdef PRODUCT
31 #define BLOCK_COMMENT(str) /* nothing */
32 #else
33 #define BLOCK_COMMENT(str) __ block_comment(str)
34 #endif
35
36 #define BIND(label) bind(label); BLOCK_COMMENT(#label ":")
37
30 address MethodHandleEntry::start_compiled_entry(MacroAssembler* _masm, 38 address MethodHandleEntry::start_compiled_entry(MacroAssembler* _masm,
31 address interpreted_entry) { 39 address interpreted_entry) {
32 // Just before the actual machine code entry point, allocate space 40 // Just before the actual machine code entry point, allocate space
33 // for a MethodHandleEntry::Data record, so that we can manage everything 41 // for a MethodHandleEntry::Data record, so that we can manage everything
34 // from one base pointer. 42 // from one base pointer.
62 #ifdef ASSERT 70 #ifdef ASSERT
63 static void verify_argslot(MacroAssembler* _masm, Register argslot_reg, 71 static void verify_argslot(MacroAssembler* _masm, Register argslot_reg,
64 const char* error_message) { 72 const char* error_message) {
65 // Verify that argslot lies within (rsp, rbp]. 73 // Verify that argslot lies within (rsp, rbp].
66 Label L_ok, L_bad; 74 Label L_ok, L_bad;
75 BLOCK_COMMENT("{ verify_argslot");
67 __ cmpptr(argslot_reg, rbp); 76 __ cmpptr(argslot_reg, rbp);
68 __ jccb(Assembler::above, L_bad); 77 __ jccb(Assembler::above, L_bad);
69 __ cmpptr(rsp, argslot_reg); 78 __ cmpptr(rsp, argslot_reg);
70 __ jccb(Assembler::below, L_ok); 79 __ jccb(Assembler::below, L_ok);
71 __ bind(L_bad); 80 __ bind(L_bad);
72 __ stop(error_message); 81 __ stop(error_message);
73 __ bind(L_ok); 82 __ bind(L_ok);
83 BLOCK_COMMENT("} verify_argslot");
74 } 84 }
75 #endif 85 #endif
76 86
77 87
78 // Code generation 88 // Code generation
79 address MethodHandles::generate_method_handle_interpreter_entry(MacroAssembler* _masm) { 89 address MethodHandles::generate_method_handle_interpreter_entry(MacroAssembler* _masm) {
80 // rbx: methodOop 90 // rbx: methodOop
81 // rcx: receiver method handle (must load from sp[MethodTypeForm.vmslots]) 91 // rcx: receiver method handle (must load from sp[MethodTypeForm.vmslots])
82 // rsi/r13: sender SP (must preserve; see prepare_to_jump_from_interpreted) 92 // rsi/r13: sender SP (must preserve; see prepare_to_jump_from_interpreted)
83 // rdx: garbage temp, blown away 93 // rdx, rdi: garbage temp, blown away
84 94
85 Register rbx_method = rbx; 95 Register rbx_method = rbx;
86 Register rcx_recv = rcx; 96 Register rcx_recv = rcx;
87 Register rax_mtype = rax; 97 Register rax_mtype = rax;
88 Register rdx_temp = rdx; 98 Register rdx_temp = rdx;
99 Register rdi_temp = rdi;
89 100
90 // emit WrongMethodType path first, to enable jccb back-branch from main path 101 // emit WrongMethodType path first, to enable jccb back-branch from main path
91 Label wrong_method_type; 102 Label wrong_method_type;
92 __ bind(wrong_method_type); 103 __ bind(wrong_method_type);
104 Label invoke_generic_slow_path;
105 assert(methodOopDesc::intrinsic_id_size_in_bytes() == sizeof(u1), "");;
106 __ cmpb(Address(rbx_method, methodOopDesc::intrinsic_id_offset_in_bytes()), (int) vmIntrinsics::_invokeExact);
107 __ jcc(Assembler::notEqual, invoke_generic_slow_path);
93 __ push(rax_mtype); // required mtype 108 __ push(rax_mtype); // required mtype
94 __ push(rcx_recv); // bad mh (1st stacked argument) 109 __ push(rcx_recv); // bad mh (1st stacked argument)
95 __ jump(ExternalAddress(Interpreter::throw_WrongMethodType_entry())); 110 __ jump(ExternalAddress(Interpreter::throw_WrongMethodType_entry()));
96 111
97 // here's where control starts out: 112 // here's where control starts out:
104 for (jint* pchase = methodOopDesc::method_type_offsets_chain(); (*pchase) != -1; pchase++) { 119 for (jint* pchase = methodOopDesc::method_type_offsets_chain(); (*pchase) != -1; pchase++) {
105 __ movptr(rax_mtype, Address(tem, *pchase)); 120 __ movptr(rax_mtype, Address(tem, *pchase));
106 tem = rax_mtype; // in case there is another indirection 121 tem = rax_mtype; // in case there is another indirection
107 } 122 }
108 } 123 }
109 Register rbx_temp = rbx_method; // done with incoming methodOop
110 124
111 // given the MethodType, find out where the MH argument is buried 125 // given the MethodType, find out where the MH argument is buried
112 __ movptr(rdx_temp, Address(rax_mtype, 126 __ movptr(rdx_temp, Address(rax_mtype,
113 __ delayed_value(java_dyn_MethodType::form_offset_in_bytes, rbx_temp))); 127 __ delayed_value(java_dyn_MethodType::form_offset_in_bytes, rdi_temp)));
114 __ movl(rdx_temp, Address(rdx_temp, 128 Register rdx_vmslots = rdx_temp;
115 __ delayed_value(java_dyn_MethodTypeForm::vmslots_offset_in_bytes, rbx_temp))); 129 __ movl(rdx_vmslots, Address(rdx_temp,
116 __ movptr(rcx_recv, __ argument_address(rdx_temp)); 130 __ delayed_value(java_dyn_MethodTypeForm::vmslots_offset_in_bytes, rdi_temp)));
117 131 __ movptr(rcx_recv, __ argument_address(rdx_vmslots));
118 __ check_method_handle_type(rax_mtype, rcx_recv, rdx_temp, wrong_method_type); 132
119 __ jump_to_method_handle_entry(rcx_recv, rdx_temp); 133 trace_method_handle(_masm, "invokeExact");
134
135 __ check_method_handle_type(rax_mtype, rcx_recv, rdi_temp, wrong_method_type);
136 __ jump_to_method_handle_entry(rcx_recv, rdi_temp);
137
138 // for invokeGeneric (only), apply argument and result conversions on the fly
139 __ bind(invoke_generic_slow_path);
140 #ifdef ASSERT
141 { Label L;
142 __ cmpb(Address(rbx_method, methodOopDesc::intrinsic_id_offset_in_bytes()), (int) vmIntrinsics::_invokeGeneric);
143 __ jcc(Assembler::equal, L);
144 __ stop("bad methodOop::intrinsic_id");
145 __ bind(L);
146 }
147 #endif //ASSERT
148 Register rbx_temp = rbx_method; // don't need it now
149
150 // make room on the stack for another pointer:
151 Register rcx_argslot = rcx_recv;
152 __ lea(rcx_argslot, __ argument_address(rdx_vmslots, 1));
153 insert_arg_slots(_masm, 2 * stack_move_unit(), _INSERT_REF_MASK,
154 rcx_argslot, rbx_temp, rdx_temp);
155
156 // load up an adapter from the calling type (Java weaves this)
157 __ movptr(rdx_temp, Address(rax_mtype,
158 __ delayed_value(java_dyn_MethodType::form_offset_in_bytes, rdi_temp)));
159 Register rdx_adapter = rdx_temp;
160 // movptr(rdx_adapter, Address(rdx_temp, java_dyn_MethodTypeForm::genericInvoker_offset_in_bytes()));
161 // deal with old JDK versions:
162 __ lea(rdi_temp, Address(rdx_temp,
163 __ delayed_value(java_dyn_MethodTypeForm::genericInvoker_offset_in_bytes, rdi_temp)));
164 __ cmpptr(rdi_temp, rdx_temp);
165 Label sorry_no_invoke_generic;
166 __ jccb(Assembler::below, sorry_no_invoke_generic);
167
168 __ movptr(rdx_adapter, Address(rdi_temp, 0));
169 __ testptr(rdx_adapter, rdx_adapter);
170 __ jccb(Assembler::zero, sorry_no_invoke_generic);
171 __ movptr(Address(rcx_argslot, 1 * Interpreter::stackElementSize), rdx_adapter);
172 // As a trusted first argument, pass the type being called, so the adapter knows
173 // the actual types of the arguments and return values.
174 // (Generic invokers are shared among form-families of method-type.)
175 __ movptr(Address(rcx_argslot, 0 * Interpreter::stackElementSize), rax_mtype);
176 // FIXME: assert that rdx_adapter is of the right method-type.
177 __ mov(rcx, rdx_adapter);
178 trace_method_handle(_masm, "invokeGeneric");
179 __ jump_to_method_handle_entry(rcx, rdi_temp);
180
181 __ bind(sorry_no_invoke_generic); // no invokeGeneric implementation available!
182 __ movptr(rcx_recv, Address(rcx_argslot, -1 * Interpreter::stackElementSize)); // recover original MH
183 __ push(rax_mtype); // required mtype
184 __ push(rcx_recv); // bad mh (1st stacked argument)
185 __ jump(ExternalAddress(Interpreter::throw_WrongMethodType_entry()));
120 186
121 return entry_point; 187 return entry_point;
122 } 188 }
123 189
124 // Helper to insert argument slots into the stack. 190 // Helper to insert argument slots into the stack.
162 // That is, copy [rsp, argslot) downward by -size words. In pseudo-code: 228 // That is, copy [rsp, argslot) downward by -size words. In pseudo-code:
163 // rsp -= size; 229 // rsp -= size;
164 // for (rdx = rsp + size; rdx < argslot; rdx++) 230 // for (rdx = rsp + size; rdx < argslot; rdx++)
165 // rdx[-size] = rdx[0] 231 // rdx[-size] = rdx[0]
166 // argslot -= size; 232 // argslot -= size;
233 BLOCK_COMMENT("insert_arg_slots {");
167 __ mov(rdx_temp, rsp); // source pointer for copy 234 __ mov(rdx_temp, rsp); // source pointer for copy
168 __ lea(rsp, Address(rsp, arg_slots, Address::times_ptr)); 235 __ lea(rsp, Address(rsp, arg_slots, Address::times_ptr));
169 { 236 {
170 Label loop; 237 Label loop;
171 __ bind(loop); 238 __ BIND(loop);
172 // pull one word down each time through the loop 239 // pull one word down each time through the loop
173 __ movptr(rbx_temp, Address(rdx_temp, 0)); 240 __ movptr(rbx_temp, Address(rdx_temp, 0));
174 __ movptr(Address(rdx_temp, arg_slots, Address::times_ptr), rbx_temp); 241 __ movptr(Address(rdx_temp, arg_slots, Address::times_ptr), rbx_temp);
175 __ addptr(rdx_temp, wordSize); 242 __ addptr(rdx_temp, wordSize);
176 __ cmpptr(rdx_temp, rax_argslot); 243 __ cmpptr(rdx_temp, rax_argslot);
177 __ jccb(Assembler::less, loop); 244 __ jccb(Assembler::less, loop);
178 } 245 }
179 246
180 // Now move the argslot down, to point to the opened-up space. 247 // Now move the argslot down, to point to the opened-up space.
181 __ lea(rax_argslot, Address(rax_argslot, arg_slots, Address::times_ptr)); 248 __ lea(rax_argslot, Address(rax_argslot, arg_slots, Address::times_ptr));
249 BLOCK_COMMENT("} insert_arg_slots");
182 } 250 }
183 251
184 // Helper to remove argument slots from the stack. 252 // Helper to remove argument slots from the stack.
185 // arg_slots must be a multiple of stack_move_unit() and >= 0 253 // arg_slots must be a multiple of stack_move_unit() and >= 0
186 void MethodHandles::remove_arg_slots(MacroAssembler* _masm, 254 void MethodHandles::remove_arg_slots(MacroAssembler* _masm,
216 if (arg_slots.is_register()) 284 if (arg_slots.is_register())
217 __ movslq(arg_slots.as_register(), arg_slots.as_register()); 285 __ movslq(arg_slots.as_register(), arg_slots.as_register());
218 } 286 }
219 #endif 287 #endif
220 288
289 BLOCK_COMMENT("remove_arg_slots {");
221 // Pull up everything shallower than rax_argslot. 290 // Pull up everything shallower than rax_argslot.
222 // Then remove the excess space on the stack. 291 // Then remove the excess space on the stack.
223 // The stacked return address gets pulled up with everything else. 292 // The stacked return address gets pulled up with everything else.
224 // That is, copy [rsp, argslot) upward by size words. In pseudo-code: 293 // That is, copy [rsp, argslot) upward by size words. In pseudo-code:
225 // for (rdx = argslot-1; rdx >= rsp; --rdx) 294 // for (rdx = argslot-1; rdx >= rsp; --rdx)
227 // argslot += size; 296 // argslot += size;
228 // rsp += size; 297 // rsp += size;
229 __ lea(rdx_temp, Address(rax_argslot, -wordSize)); // source pointer for copy 298 __ lea(rdx_temp, Address(rax_argslot, -wordSize)); // source pointer for copy
230 { 299 {
231 Label loop; 300 Label loop;
232 __ bind(loop); 301 __ BIND(loop);
233 // pull one word up each time through the loop 302 // pull one word up each time through the loop
234 __ movptr(rbx_temp, Address(rdx_temp, 0)); 303 __ movptr(rbx_temp, Address(rdx_temp, 0));
235 __ movptr(Address(rdx_temp, arg_slots, Address::times_ptr), rbx_temp); 304 __ movptr(Address(rdx_temp, arg_slots, Address::times_ptr), rbx_temp);
236 __ addptr(rdx_temp, -wordSize); 305 __ addptr(rdx_temp, -wordSize);
237 __ cmpptr(rdx_temp, rsp); 306 __ cmpptr(rdx_temp, rsp);
240 309
241 // Now move the argslot up, to point to the just-copied block. 310 // Now move the argslot up, to point to the just-copied block.
242 __ lea(rsp, Address(rsp, arg_slots, Address::times_ptr)); 311 __ lea(rsp, Address(rsp, arg_slots, Address::times_ptr));
243 // And adjust the argslot address to point at the deletion point. 312 // And adjust the argslot address to point at the deletion point.
244 __ lea(rax_argslot, Address(rax_argslot, arg_slots, Address::times_ptr)); 313 __ lea(rax_argslot, Address(rax_argslot, arg_slots, Address::times_ptr));
314 BLOCK_COMMENT("} remove_arg_slots");
245 } 315 }
246 316
247 #ifndef PRODUCT 317 #ifndef PRODUCT
248 extern "C" void print_method_handle(oop mh); 318 extern "C" void print_method_handle(oop mh);
249 void trace_method_handle_stub(const char* adaptername, 319 void trace_method_handle_stub(const char* adaptername,
250 oop mh, 320 oop mh,
321 intptr_t* saved_regs,
251 intptr_t* entry_sp, 322 intptr_t* entry_sp,
252 intptr_t* saved_sp, 323 intptr_t* saved_sp,
253 intptr_t* saved_bp) { 324 intptr_t* saved_bp) {
254 // called as a leaf from native code: do not block the JVM! 325 // called as a leaf from native code: do not block the JVM!
255 intptr_t* last_sp = (intptr_t*) saved_bp[frame::interpreter_frame_last_sp_offset]; 326 intptr_t* last_sp = (intptr_t*) saved_bp[frame::interpreter_frame_last_sp_offset];
256 intptr_t* base_sp = (intptr_t*) saved_bp[frame::interpreter_frame_monitor_block_top_offset]; 327 intptr_t* base_sp = (intptr_t*) saved_bp[frame::interpreter_frame_monitor_block_top_offset];
257 printf("MH %s mh="INTPTR_FORMAT" sp=("INTPTR_FORMAT"+"INTX_FORMAT") stack_size="INTX_FORMAT" bp="INTPTR_FORMAT"\n", 328 printf("MH %s mh="INTPTR_FORMAT" sp=("INTPTR_FORMAT"+"INTX_FORMAT") stack_size="INTX_FORMAT" bp="INTPTR_FORMAT"\n",
258 adaptername, (intptr_t)mh, (intptr_t)entry_sp, (intptr_t)(saved_sp - entry_sp), (intptr_t)(base_sp - last_sp), (intptr_t)saved_bp); 329 adaptername, (intptr_t)mh, (intptr_t)entry_sp, (intptr_t)(saved_sp - entry_sp), (intptr_t)(base_sp - last_sp), (intptr_t)saved_bp);
259 if (last_sp != saved_sp) 330 if (last_sp != saved_sp && last_sp != NULL)
260 printf("*** last_sp="INTPTR_FORMAT"\n", (intptr_t)last_sp); 331 printf("*** last_sp="INTPTR_FORMAT"\n", (intptr_t)last_sp);
261 if (Verbose) print_method_handle(mh); 332 if (Verbose) {
333 printf(" reg dump: ");
334 int saved_regs_count = (entry_sp-1) - saved_regs;
335 // 32 bit: rdi rsi rbp rsp; rbx rdx rcx (*) rax
336 int i;
337 for (i = 0; i <= saved_regs_count; i++) {
338 if (i > 0 && i % 4 == 0 && i != saved_regs_count)
339 printf("\n + dump: ");
340 printf(" %d: "INTPTR_FORMAT, i, saved_regs[i]);
341 }
342 printf("\n");
343 int stack_dump_count = 16;
344 if (stack_dump_count < (int)(saved_bp + 2 - saved_sp))
345 stack_dump_count = (int)(saved_bp + 2 - saved_sp);
346 if (stack_dump_count > 64) stack_dump_count = 48;
347 for (i = 0; i < stack_dump_count; i += 4) {
348 printf(" dump at SP[%d] "INTPTR_FORMAT": "INTPTR_FORMAT" "INTPTR_FORMAT" "INTPTR_FORMAT" "INTPTR_FORMAT"\n",
349 i, &entry_sp[i+0], entry_sp[i+0], entry_sp[i+1], entry_sp[i+2], entry_sp[i+3]);
350 }
351 print_method_handle(mh);
352 }
353 }
354 void MethodHandles::trace_method_handle(MacroAssembler* _masm, const char* adaptername) {
355 if (!TraceMethodHandles) return;
356 BLOCK_COMMENT("trace_method_handle {");
357 __ push(rax);
358 __ lea(rax, Address(rsp, wordSize*6)); // entry_sp
359 __ pusha();
360 // arguments:
361 __ push(rbp); // interpreter frame pointer
362 __ push(rsi); // saved_sp
363 __ push(rax); // entry_sp
364 __ push(rcx); // mh
365 __ push(rcx);
366 __ movptr(Address(rsp, 0), (intptr_t) adaptername);
367 __ call_VM_leaf(CAST_FROM_FN_PTR(address, trace_method_handle_stub), 5);
368 __ popa();
369 __ pop(rax);
370 BLOCK_COMMENT("} trace_method_handle");
262 } 371 }
263 #endif //PRODUCT 372 #endif //PRODUCT
264 373
265 // which conversion op types are implemented here? 374 // which conversion op types are implemented here?
266 int MethodHandles::adapter_conversion_ops_supported_mask() { 375 int MethodHandles::adapter_conversion_ops_supported_mask() {
322 } 431 }
323 432
324 address interp_entry = __ pc(); 433 address interp_entry = __ pc();
325 if (UseCompressedOops) __ unimplemented("UseCompressedOops"); 434 if (UseCompressedOops) __ unimplemented("UseCompressedOops");
326 435
327 #ifndef PRODUCT 436 trace_method_handle(_masm, entry_name(ek));
328 if (TraceMethodHandles) { 437
329 __ push(rax); __ push(rbx); __ push(rcx); __ push(rdx); __ push(rsi); __ push(rdi); 438 BLOCK_COMMENT(entry_name(ek));
330 __ lea(rax, Address(rsp, wordSize*6)); // entry_sp
331 // arguments:
332 __ push(rbp); // interpreter frame pointer
333 __ push(rsi); // saved_sp
334 __ push(rax); // entry_sp
335 __ push(rcx); // mh
336 __ push(rcx);
337 __ movptr(Address(rsp, 0), (intptr_t)entry_name(ek));
338 __ call_VM_leaf(CAST_FROM_FN_PTR(address, trace_method_handle_stub), 5);
339 __ pop(rdi); __ pop(rsi); __ pop(rdx); __ pop(rcx); __ pop(rbx); __ pop(rax);
340 }
341 #endif //PRODUCT
342 439
343 switch ((int) ek) { 440 switch ((int) ek) {
344 case _raise_exception: 441 case _raise_exception:
345 { 442 {
346 // Not a real MH entry, but rather shared code for raising an exception. 443 // Not a real MH entry, but rather shared code for raising an exception.