30 #include "classfile/javaClasses.inline.hpp"
31 #include "classfile/stringTable.hpp"
32 #include "classfile/vmClasses.hpp"
33 #include "classfile/vmSymbols.hpp"
34 #include "code/aotCodeCache.hpp"
35 #include "code/codeCache.hpp"
36 #include "code/compiledIC.hpp"
37 #include "code/nmethod.inline.hpp"
38 #include "code/scopeDesc.hpp"
39 #include "code/vtableStubs.hpp"
40 #include "compiler/abstractCompiler.hpp"
41 #include "compiler/compileBroker.hpp"
42 #include "compiler/disassembler.hpp"
43 #include "gc/shared/barrierSet.hpp"
44 #include "gc/shared/collectedHeap.hpp"
45 #include "interpreter/interpreter.hpp"
46 #include "interpreter/interpreterRuntime.hpp"
47 #include "jfr/jfrEvents.hpp"
48 #include "jvm.h"
49 #include "logging/log.hpp"
50 #include "memory/resourceArea.hpp"
51 #include "memory/universe.hpp"
52 #include "metaprogramming/primitiveConversions.hpp"
53 #include "oops/klass.hpp"
54 #include "oops/method.inline.hpp"
55 #include "oops/objArrayKlass.hpp"
56 #include "oops/oop.inline.hpp"
57 #include "prims/forte.hpp"
58 #include "prims/jvmtiExport.hpp"
59 #include "prims/jvmtiThreadState.hpp"
60 #include "prims/methodHandles.hpp"
61 #include "prims/nativeLookup.hpp"
62 #include "runtime/arguments.hpp"
63 #include "runtime/atomicAccess.hpp"
64 #include "runtime/basicLock.inline.hpp"
65 #include "runtime/frame.inline.hpp"
66 #include "runtime/handles.inline.hpp"
67 #include "runtime/init.hpp"
68 #include "runtime/interfaceSupport.inline.hpp"
69 #include "runtime/java.hpp"
70 #include "runtime/javaCalls.hpp"
71 #include "runtime/jniHandles.inline.hpp"
72 #include "runtime/osThread.hpp"
73 #include "runtime/perfData.hpp"
74 #include "runtime/sharedRuntime.hpp"
75 #include "runtime/stackWatermarkSet.hpp"
76 #include "runtime/stubRoutines.hpp"
77 #include "runtime/synchronizer.hpp"
78 #include "runtime/timerTrace.hpp"
79 #include "runtime/vframe.inline.hpp"
80 #include "runtime/vframeArray.hpp"
81 #include "runtime/vm_version.hpp"
82 #include "utilities/copy.hpp"
83 #include "utilities/dtrace.hpp"
84 #include "utilities/events.hpp"
85 #include "utilities/exceptions.hpp"
86 #include "utilities/globalDefinitions.hpp"
87 #include "utilities/hashTable.hpp"
88 #include "utilities/macros.hpp"
89 #include "utilities/xmlstream.hpp"
90 #ifdef COMPILER1
91 #include "c1/c1_Runtime1.hpp"
92 #endif
93 #ifdef COMPILER2
94 #include "opto/runtime.hpp"
105 type* SharedRuntime::BLOB_FIELD_NAME(name);
106 SHARED_STUBS_DO(SHARED_STUB_FIELD_DEFINE)
107 #undef SHARED_STUB_FIELD_DEFINE
108
109 nmethod* SharedRuntime::_cont_doYield_stub;
110
111 #if 0
112 // TODO tweak global stub name generation to match this
113 #define SHARED_STUB_NAME_DECLARE(name, type) "Shared Runtime " # name "_blob",
114 const char *SharedRuntime::_stub_names[] = {
115 SHARED_STUBS_DO(SHARED_STUB_NAME_DECLARE)
116 };
117 #endif
118
119 //----------------------------generate_stubs-----------------------------------
120 void SharedRuntime::generate_initial_stubs() {
121 // Build this early so it's available for the interpreter.
122 _throw_StackOverflowError_blob =
123 generate_throw_exception(StubId::shared_throw_StackOverflowError_id,
124 CAST_FROM_FN_PTR(address, SharedRuntime::throw_StackOverflowError));
125 }
126
127 void SharedRuntime::generate_stubs() {
128 _wrong_method_blob =
129 generate_resolve_blob(StubId::shared_wrong_method_id,
130 CAST_FROM_FN_PTR(address, SharedRuntime::handle_wrong_method));
131 _wrong_method_abstract_blob =
132 generate_resolve_blob(StubId::shared_wrong_method_abstract_id,
133 CAST_FROM_FN_PTR(address, SharedRuntime::handle_wrong_method_abstract));
134 _ic_miss_blob =
135 generate_resolve_blob(StubId::shared_ic_miss_id,
136 CAST_FROM_FN_PTR(address, SharedRuntime::handle_wrong_method_ic_miss));
137 _resolve_opt_virtual_call_blob =
138 generate_resolve_blob(StubId::shared_resolve_opt_virtual_call_id,
139 CAST_FROM_FN_PTR(address, SharedRuntime::resolve_opt_virtual_call_C));
140 _resolve_virtual_call_blob =
141 generate_resolve_blob(StubId::shared_resolve_virtual_call_id,
142 CAST_FROM_FN_PTR(address, SharedRuntime::resolve_virtual_call_C));
143 _resolve_static_call_blob =
144 generate_resolve_blob(StubId::shared_resolve_static_call_id,
1167 // for a call current in progress, i.e., arguments has been pushed on stack
1168 // but callee has not been invoked yet. Caller frame must be compiled.
1169 Handle SharedRuntime::find_callee_info_helper(vframeStream& vfst, Bytecodes::Code& bc,
1170 CallInfo& callinfo, TRAPS) {
1171 Handle receiver;
1172 Handle nullHandle; // create a handy null handle for exception returns
1173 JavaThread* current = THREAD;
1174
1175 assert(!vfst.at_end(), "Java frame must exist");
1176
1177 // Find caller and bci from vframe
1178 methodHandle caller(current, vfst.method());
1179 int bci = vfst.bci();
1180
1181 if (caller->is_continuation_enter_intrinsic()) {
1182 bc = Bytecodes::_invokestatic;
1183 LinkResolver::resolve_continuation_enter(callinfo, CHECK_NH);
1184 return receiver;
1185 }
1186
1187 Bytecode_invoke bytecode(caller, bci);
1188 int bytecode_index = bytecode.index();
1189 bc = bytecode.invoke_code();
1190
1191 methodHandle attached_method(current, extract_attached_method(vfst));
1192 if (attached_method.not_null()) {
1193 Method* callee = bytecode.static_target(CHECK_NH);
1194 vmIntrinsics::ID id = callee->intrinsic_id();
1195 // When VM replaces MH.invokeBasic/linkTo* call with a direct/virtual call,
1196 // it attaches statically resolved method to the call site.
1197 if (MethodHandles::is_signature_polymorphic(id) &&
1198 MethodHandles::is_signature_polymorphic_intrinsic(id)) {
1199 bc = MethodHandles::signature_polymorphic_intrinsic_bytecode(id);
1200
1201 // Adjust invocation mode according to the attached method.
1202 switch (bc) {
1203 case Bytecodes::_invokevirtual:
1204 if (attached_method->method_holder()->is_interface()) {
1205 bc = Bytecodes::_invokeinterface;
1206 }
1207 break;
1208 case Bytecodes::_invokeinterface:
1209 if (!attached_method->method_holder()->is_interface()) {
1210 bc = Bytecodes::_invokevirtual;
1211 }
1212 break;
1213 case Bytecodes::_invokehandle:
1214 if (!MethodHandles::is_signature_polymorphic_method(attached_method())) {
1215 bc = attached_method->is_static() ? Bytecodes::_invokestatic
1216 : Bytecodes::_invokevirtual;
1217 }
1218 break;
1219 default:
1220 break;
1221 }
1222 }
1223 }
1224
1225 assert(bc != Bytecodes::_illegal, "not initialized");
1226
1227 bool has_receiver = bc != Bytecodes::_invokestatic &&
1228 bc != Bytecodes::_invokedynamic &&
1229 bc != Bytecodes::_invokehandle;
1230
1231 // Find receiver for non-static call
1232 if (has_receiver) {
1233 // This register map must be update since we need to find the receiver for
1234 // compiled frames. The receiver might be in a register.
1235 RegisterMap reg_map2(current,
1236 RegisterMap::UpdateMap::include,
1237 RegisterMap::ProcessFrames::include,
1238 RegisterMap::WalkContinuation::skip);
1239 frame stubFrame = current->last_frame();
1240 // Caller-frame is a compiled frame
1241 frame callerFrame = stubFrame.sender(®_map2);
1242
1243 if (attached_method.is_null()) {
1244 Method* callee = bytecode.static_target(CHECK_NH);
1245 if (callee == nullptr) {
1246 THROW_(vmSymbols::java_lang_NoSuchMethodException(), nullHandle);
1247 }
1248 }
1249
1250 // Retrieve from a compiled argument list
1251 receiver = Handle(current, callerFrame.retrieve_receiver(®_map2));
1252 assert(oopDesc::is_oop_or_null(receiver()), "");
1253
1254 if (receiver.is_null()) {
1255 THROW_(vmSymbols::java_lang_NullPointerException(), nullHandle);
1256 }
1257 }
1258
1259 // Resolve method
1260 if (attached_method.not_null()) {
1261 // Parameterized by attached method.
1262 LinkResolver::resolve_invoke(callinfo, receiver, attached_method, bc, CHECK_NH);
1263 } else {
1264 // Parameterized by bytecode.
1265 constantPoolHandle constants(current, caller->constants());
1266 LinkResolver::resolve_invoke(callinfo, receiver, constants, bytecode_index, bc, CHECK_NH);
1267 }
1268
1269 #ifdef ASSERT
1270 // Check that the receiver klass is of the right subtype and that it is initialized for virtual calls
1271 if (has_receiver) {
1272 assert(receiver.not_null(), "should have thrown exception");
1273 Klass* receiver_klass = receiver->klass();
1274 Klass* rk = nullptr;
1275 if (attached_method.not_null()) {
1276 // In case there's resolved method attached, use its holder during the check.
1277 rk = attached_method->method_holder();
1278 } else {
1279 // Klass is already loaded.
1280 constantPoolHandle constants(current, caller->constants());
1281 rk = constants->klass_ref_at(bytecode_index, bc, CHECK_NH);
1282 }
1283 Klass* static_receiver_klass = rk;
1284 assert(receiver_klass->is_subtype_of(static_receiver_klass),
1285 "actual receiver must be subclass of static receiver klass");
1286 if (receiver_klass->is_instance_klass()) {
1287 if (InstanceKlass::cast(receiver_klass)->is_not_initialized()) {
1288 tty->print_cr("ERROR: Klass not yet initialized!!");
1289 receiver_klass->print();
1290 }
1291 assert(!InstanceKlass::cast(receiver_klass)->is_not_initialized(), "receiver_klass must be initialized");
1292 }
1293 }
1294 #endif
1295
1296 return receiver;
1297 }
1298
1299 methodHandle SharedRuntime::find_callee_method(TRAPS) {
1300 JavaThread* current = THREAD;
1301 ResourceMark rm(current);
1302 // We need first to check if any Java activations (compiled, interpreted)
1303 // exist on the stack since last JavaCall. If not, we need
1304 // to get the target method from the JavaCall wrapper.
1305 vframeStream vfst(current, true); // Do not skip any javaCalls
1306 methodHandle callee_method;
1307 if (vfst.at_end()) {
1308 // No Java frames were found on stack since we did the JavaCall.
1309 // Hence the stack can only contain an entry_frame. We need to
1310 // find the target method from the stub frame.
1311 RegisterMap reg_map(current,
1312 RegisterMap::UpdateMap::skip,
1313 RegisterMap::ProcessFrames::include,
1314 RegisterMap::WalkContinuation::skip);
1315 frame fr = current->last_frame();
1316 assert(fr.is_runtime_frame(), "must be a runtimeStub");
1317 fr = fr.sender(®_map);
1318 assert(fr.is_entry_frame(), "must be");
1319 // fr is now pointing to the entry frame.
1320 callee_method = methodHandle(current, fr.entry_frame_call_wrapper()->callee_method());
1321 } else {
1322 Bytecodes::Code bc;
1323 CallInfo callinfo;
1324 find_callee_info_helper(vfst, bc, callinfo, CHECK_(methodHandle()));
1325 callee_method = methodHandle(current, callinfo.selected_method());
1326 }
1327 assert(callee_method()->is_method(), "must be");
1328 return callee_method;
1329 }
1330
1331 // Resolves a call.
1332 methodHandle SharedRuntime::resolve_helper(bool is_virtual, bool is_optimized, TRAPS) {
1333 JavaThread* current = THREAD;
1334 ResourceMark rm(current);
1335 RegisterMap cbl_map(current,
1336 RegisterMap::UpdateMap::skip,
1337 RegisterMap::ProcessFrames::include,
1338 RegisterMap::WalkContinuation::skip);
1339 frame caller_frame = current->last_frame().sender(&cbl_map);
1340
1341 CodeBlob* caller_cb = caller_frame.cb();
1342 guarantee(caller_cb != nullptr && caller_cb->is_nmethod(), "must be called from compiled method");
1343 nmethod* caller_nm = caller_cb->as_nmethod();
1344
1345 // determine call info & receiver
1346 // note: a) receiver is null for static calls
1347 // b) an exception is thrown if receiver is null for non-static calls
1348 CallInfo call_info;
1349 Bytecodes::Code invoke_code = Bytecodes::_illegal;
1350 Handle receiver = find_callee_info(invoke_code, call_info, CHECK_(methodHandle()));
1351
1352 NoSafepointVerifier nsv;
1353
1354 methodHandle callee_method(current, call_info.selected_method());
1355
1356 assert((!is_virtual && invoke_code == Bytecodes::_invokestatic ) ||
1357 (!is_virtual && invoke_code == Bytecodes::_invokespecial) ||
1358 (!is_virtual && invoke_code == Bytecodes::_invokehandle ) ||
1359 (!is_virtual && invoke_code == Bytecodes::_invokedynamic) ||
1360 ( is_virtual && invoke_code != Bytecodes::_invokestatic ), "inconsistent bytecode");
1361
1362 assert(!caller_nm->is_unloading(), "It should not be unloading");
1363
1364 #ifndef PRODUCT
1365 // tracing/debugging/statistics
1366 uint *addr = (is_optimized) ? (&_resolve_opt_virtual_ctr) :
1367 (is_virtual) ? (&_resolve_virtual_ctr) :
1368 (&_resolve_static_ctr);
1369 AtomicAccess::inc(addr);
1370
1371 if (TraceCallFixup) {
1372 ResourceMark rm(current);
1373 tty->print("resolving %s%s (%s) call to",
1374 (is_optimized) ? "optimized " : "", (is_virtual) ? "virtual" : "static",
1375 Bytecodes::name(invoke_code));
1376 callee_method->print_short_name(tty);
1377 tty->print_cr(" at pc: " INTPTR_FORMAT " to code: " INTPTR_FORMAT,
1378 p2i(caller_frame.pc()), p2i(callee_method->code()));
1379 }
1380 #endif
1381
1382 if (invoke_code == Bytecodes::_invokestatic) {
1383 assert(callee_method->method_holder()->is_initialized() ||
1384 callee_method->method_holder()->is_reentrant_initialization(current),
1385 "invalid class initialization state for invoke_static");
1386 if (!VM_Version::supports_fast_class_init_checks() && callee_method->needs_clinit_barrier()) {
1387 // In order to keep class initialization check, do not patch call
1388 // site for static call when the class is not fully initialized.
1389 // Proper check is enforced by call site re-resolution on every invocation.
1390 //
1391 // When fast class initialization checks are supported (VM_Version::supports_fast_class_init_checks() == true),
1392 // explicit class initialization check is put in nmethod entry (VEP).
1393 assert(callee_method->method_holder()->is_linked(), "must be");
1394 return callee_method;
1395 }
1396 }
1397
1398
1399 // JSR 292 key invariant:
1400 // If the resolved method is a MethodHandle invoke target, the call
1401 // site must be a MethodHandle call site, because the lambda form might tail-call
1402 // leaving the stack in a state unknown to either caller or callee
1403
1404 // Compute entry points. The computation of the entry points is independent of
1405 // patching the call.
1406
1407 // Make sure the callee nmethod does not get deoptimized and removed before
1408 // we are done patching the code.
1409
1410
1411 CompiledICLocker ml(caller_nm);
1412 if (is_virtual && !is_optimized) {
1413 CompiledIC* inline_cache = CompiledIC_before(caller_nm, caller_frame.pc());
1414 inline_cache->update(&call_info, receiver->klass());
1415 } else {
1416 // Callsite is a direct call - set it to the destination method
1417 CompiledDirectCall* callsite = CompiledDirectCall::before(caller_frame.pc());
1418 callsite->set(callee_method);
1419 }
1420
1421 return callee_method;
1422 }
1423
1424 // Inline caches exist only in compiled code
1425 JRT_BLOCK_ENTRY(address, SharedRuntime::handle_wrong_method_ic_miss(JavaThread* current))
1426 #ifdef ASSERT
1427 RegisterMap reg_map(current,
1428 RegisterMap::UpdateMap::skip,
1429 RegisterMap::ProcessFrames::include,
1430 RegisterMap::WalkContinuation::skip);
1431 frame stub_frame = current->last_frame();
1432 assert(stub_frame.is_runtime_frame(), "sanity check");
1433 frame caller_frame = stub_frame.sender(®_map);
1434 assert(!caller_frame.is_interpreted_frame() && !caller_frame.is_entry_frame() && !caller_frame.is_upcall_stub_frame(), "unexpected frame");
1435 #endif /* ASSERT */
1436
1437 methodHandle callee_method;
1438 JRT_BLOCK
1439 callee_method = SharedRuntime::handle_ic_miss_helper(CHECK_NULL);
1440 // Return Method* through TLS
1441 current->set_vm_result_metadata(callee_method());
1442 JRT_BLOCK_END
1443 // return compiled code entry point after potential safepoints
1444 return get_resolved_entry(current, callee_method);
1445 JRT_END
1446
1447
1448 // Handle call site that has been made non-entrant
1449 JRT_BLOCK_ENTRY(address, SharedRuntime::handle_wrong_method(JavaThread* current))
1450 // 6243940 We might end up in here if the callee is deoptimized
1451 // as we race to call it. We don't want to take a safepoint if
1452 // the caller was interpreted because the caller frame will look
1453 // interpreted to the stack walkers and arguments are now
1454 // "compiled" so it is much better to make this transition
1455 // invisible to the stack walking code. The i2c path will
1456 // place the callee method in the callee_target. It is stashed
1457 // there because if we try and find the callee by normal means a
1458 // safepoint is possible and have trouble gc'ing the compiled args.
1459 RegisterMap reg_map(current,
1460 RegisterMap::UpdateMap::skip,
1461 RegisterMap::ProcessFrames::include,
1462 RegisterMap::WalkContinuation::skip);
1463 frame stub_frame = current->last_frame();
1464 assert(stub_frame.is_runtime_frame(), "sanity check");
1465 frame caller_frame = stub_frame.sender(®_map);
1466
1467 if (caller_frame.is_interpreted_frame() ||
1468 caller_frame.is_entry_frame() ||
1469 caller_frame.is_upcall_stub_frame()) {
1470 Method* callee = current->callee_target();
1471 guarantee(callee != nullptr && callee->is_method(), "bad handshake");
1472 current->set_vm_result_metadata(callee);
1473 current->set_callee_target(nullptr);
1474 if (caller_frame.is_entry_frame() && VM_Version::supports_fast_class_init_checks()) {
1475 // Bypass class initialization checks in c2i when caller is in native.
1476 // JNI calls to static methods don't have class initialization checks.
1477 // Fast class initialization checks are present in c2i adapters and call into
1478 // SharedRuntime::handle_wrong_method() on the slow path.
1479 //
1480 // JVM upcalls may land here as well, but there's a proper check present in
1481 // LinkResolver::resolve_static_call (called from JavaCalls::call_static),
1482 // so bypassing it in c2i adapter is benign.
1483 return callee->get_c2i_no_clinit_check_entry();
1484 } else {
1485 return callee->get_c2i_entry();
1486 }
1487 }
1488
1489 // Must be compiled to compiled path which is safe to stackwalk
1490 methodHandle callee_method;
1491 JRT_BLOCK
1492 // Force resolving of caller (if we called from compiled frame)
1493 callee_method = SharedRuntime::reresolve_call_site(CHECK_NULL);
1494 current->set_vm_result_metadata(callee_method());
1495 JRT_BLOCK_END
1496 // return compiled code entry point after potential safepoints
1497 return get_resolved_entry(current, callee_method);
1498 JRT_END
1499
1500 // Handle abstract method call
1501 JRT_BLOCK_ENTRY(address, SharedRuntime::handle_wrong_method_abstract(JavaThread* current))
1502 // Verbose error message for AbstractMethodError.
1503 // Get the called method from the invoke bytecode.
1504 vframeStream vfst(current, true);
1505 assert(!vfst.at_end(), "Java frame must exist");
1506 methodHandle caller(current, vfst.method());
1507 Bytecode_invoke invoke(caller, vfst.bci());
1508 DEBUG_ONLY( invoke.verify(); )
1509
1510 // Find the compiled caller frame.
1511 RegisterMap reg_map(current,
1512 RegisterMap::UpdateMap::include,
1513 RegisterMap::ProcessFrames::include,
1514 RegisterMap::WalkContinuation::skip);
1515 frame stubFrame = current->last_frame();
1516 assert(stubFrame.is_runtime_frame(), "must be");
1517 frame callerFrame = stubFrame.sender(®_map);
1518 assert(callerFrame.is_compiled_frame(), "must be");
1519
1520 // Install exception and return forward entry.
1521 address res = SharedRuntime::throw_AbstractMethodError_entry();
1522 JRT_BLOCK
1523 methodHandle callee(current, invoke.static_target(current));
1524 if (!callee.is_null()) {
1525 oop recv = callerFrame.retrieve_receiver(®_map);
1526 Klass *recv_klass = (recv != nullptr) ? recv->klass() : nullptr;
1527 res = StubRoutines::forward_exception_entry();
1528 LinkResolver::throw_abstract_method_error(callee, recv_klass, CHECK_(res));
1529 }
1530 JRT_BLOCK_END
1531 return res;
1532 JRT_END
1533
1534 // return verified_code_entry if interp_only_mode is not set for the current thread;
1535 // otherwise return c2i entry.
1536 address SharedRuntime::get_resolved_entry(JavaThread* current, methodHandle callee_method) {
1537 if (current->is_interp_only_mode() && !callee_method->is_special_native_intrinsic()) {
1538 // In interp_only_mode we need to go to the interpreted entry
1539 // The c2i won't patch in this mode -- see fixup_callers_callsite
1540 return callee_method->get_c2i_entry();
1541 }
1542 assert(callee_method->verified_code_entry() != nullptr, " Jump to zero!");
1543 return callee_method->verified_code_entry();
1544 }
1545
1546 // resolve a static call and patch code
1547 JRT_BLOCK_ENTRY(address, SharedRuntime::resolve_static_call_C(JavaThread* current ))
1548 methodHandle callee_method;
1549 bool enter_special = false;
1550 JRT_BLOCK
1551 callee_method = SharedRuntime::resolve_helper(false, false, CHECK_NULL);
1552 current->set_vm_result_metadata(callee_method());
1553 JRT_BLOCK_END
1554 // return compiled code entry point after potential safepoints
1555 return get_resolved_entry(current, callee_method);
1556 JRT_END
1557
1558 // resolve virtual call and update inline cache to monomorphic
1559 JRT_BLOCK_ENTRY(address, SharedRuntime::resolve_virtual_call_C(JavaThread* current))
1560 methodHandle callee_method;
1561 JRT_BLOCK
1562 callee_method = SharedRuntime::resolve_helper(true, false, CHECK_NULL);
1563 current->set_vm_result_metadata(callee_method());
1564 JRT_BLOCK_END
1565 // return compiled code entry point after potential safepoints
1566 return get_resolved_entry(current, callee_method);
1567 JRT_END
1568
1569
1570 // Resolve a virtual call that can be statically bound (e.g., always
1571 // monomorphic, so it has no inline cache). Patch code to resolved target.
1572 JRT_BLOCK_ENTRY(address, SharedRuntime::resolve_opt_virtual_call_C(JavaThread* current))
1573 methodHandle callee_method;
1574 JRT_BLOCK
1575 callee_method = SharedRuntime::resolve_helper(true, true, CHECK_NULL);
1576 current->set_vm_result_metadata(callee_method());
1577 JRT_BLOCK_END
1578 // return compiled code entry point after potential safepoints
1579 return get_resolved_entry(current, callee_method);
1580 JRT_END
1581
1582 methodHandle SharedRuntime::handle_ic_miss_helper(TRAPS) {
1583 JavaThread* current = THREAD;
1584 ResourceMark rm(current);
1585 CallInfo call_info;
1586 Bytecodes::Code bc;
1587
1588 // receiver is null for static calls. An exception is thrown for null
1589 // receivers for non-static calls
1590 Handle receiver = find_callee_info(bc, call_info, CHECK_(methodHandle()));
1591
1592 methodHandle callee_method(current, call_info.selected_method());
1593
1594 #ifndef PRODUCT
1595 AtomicAccess::inc(&_ic_miss_ctr);
1596
1597 // Statistics & Tracing
1598 if (TraceCallFixup) {
1599 ResourceMark rm(current);
1600 tty->print("IC miss (%s) call to", Bytecodes::name(bc));
1601 callee_method->print_short_name(tty);
1602 tty->print_cr(" code: " INTPTR_FORMAT, p2i(callee_method->code()));
1603 }
1604
1605 if (ICMissHistogram) {
1606 MutexLocker m(VMStatistic_lock);
1607 RegisterMap reg_map(current,
1608 RegisterMap::UpdateMap::skip,
1609 RegisterMap::ProcessFrames::include,
1610 RegisterMap::WalkContinuation::skip);
1611 frame f = current->last_frame().real_sender(®_map);// skip runtime stub
1612 // produce statistics under the lock
1613 trace_ic_miss(f.pc());
1614 }
1615 #endif
1616
1617 // install an event collector so that when a vtable stub is created the
1618 // profiler can be notified via a DYNAMIC_CODE_GENERATED event. The
1619 // event can't be posted when the stub is created as locks are held
1620 // - instead the event will be deferred until the event collector goes
1621 // out of scope.
1622 JvmtiDynamicCodeEventCollector event_collector;
1623
1624 // Update inline cache to megamorphic. Skip update if we are called from interpreted.
1625 RegisterMap reg_map(current,
1626 RegisterMap::UpdateMap::skip,
1627 RegisterMap::ProcessFrames::include,
1628 RegisterMap::WalkContinuation::skip);
1629 frame caller_frame = current->last_frame().sender(®_map);
1630 CodeBlob* cb = caller_frame.cb();
1631 nmethod* caller_nm = cb->as_nmethod();
1632
1633 CompiledICLocker ml(caller_nm);
1634 CompiledIC* inline_cache = CompiledIC_before(caller_nm, caller_frame.pc());
1635 inline_cache->update(&call_info, receiver()->klass());
1636
1637 return callee_method;
1638 }
1639
1640 //
1641 // Resets a call-site in compiled code so it will get resolved again.
1642 // This routines handles both virtual call sites, optimized virtual call
1643 // sites, and static call sites. Typically used to change a call sites
1644 // destination from compiled to interpreted.
1645 //
1646 methodHandle SharedRuntime::reresolve_call_site(TRAPS) {
1647 JavaThread* current = THREAD;
1648 ResourceMark rm(current);
1649 RegisterMap reg_map(current,
1650 RegisterMap::UpdateMap::skip,
1651 RegisterMap::ProcessFrames::include,
1652 RegisterMap::WalkContinuation::skip);
1653 frame stub_frame = current->last_frame();
1654 assert(stub_frame.is_runtime_frame(), "must be a runtimeStub");
1655 frame caller = stub_frame.sender(®_map);
1656
1657 // Do nothing if the frame isn't a live compiled frame.
1658 // nmethod could be deoptimized by the time we get here
1659 // so no update to the caller is needed.
1660
1661 if ((caller.is_compiled_frame() && !caller.is_deoptimized_frame()) ||
1662 (caller.is_native_frame() && caller.cb()->as_nmethod()->method()->is_continuation_enter_intrinsic())) {
1663
1664 address pc = caller.pc();
1665
1666 nmethod* caller_nm = CodeCache::find_nmethod(pc);
1667 assert(caller_nm != nullptr, "did not find caller nmethod");
1668
1669 // Default call_addr is the location of the "basic" call.
1670 // Determine the address of the call we a reresolving. With
1671 // Inline Caches we will always find a recognizable call.
1672 // With Inline Caches disabled we may or may not find a
1673 // recognizable call. We will always find a call for static
1674 // calls and for optimized virtual calls. For vanilla virtual
1675 // calls it depends on the state of the UseInlineCaches switch.
1676 //
1677 // With Inline Caches disabled we can get here for a virtual call
1678 // for two reasons:
1679 // 1 - calling an abstract method. The vtable for abstract methods
1680 // will run us thru handle_wrong_method and we will eventually
1681 // end up in the interpreter to throw the ame.
1682 // 2 - a racing deoptimization. We could be doing a vanilla vtable
1683 // call and between the time we fetch the entry address and
1684 // we jump to it the target gets deoptimized. Similar to 1
1685 // we will wind up in the interprter (thru a c2i with c2).
1686 //
1687 CompiledICLocker ml(caller_nm);
1688 address call_addr = caller_nm->call_instruction_address(pc);
1689
1690 if (call_addr != nullptr) {
1691 // On x86 the logic for finding a call instruction is blindly checking for a call opcode 5
1692 // bytes back in the instruction stream so we must also check for reloc info.
1693 RelocIterator iter(caller_nm, call_addr, call_addr+1);
1694 bool ret = iter.next(); // Get item
1695 if (ret) {
1696 switch (iter.type()) {
1697 case relocInfo::static_call_type:
1698 case relocInfo::opt_virtual_call_type: {
1699 CompiledDirectCall* cdc = CompiledDirectCall::at(call_addr);
1700 cdc->set_to_clean();
1701 break;
1702 }
1703
1704 case relocInfo::virtual_call_type: {
1705 // compiled, dispatched call (which used to call an interpreted method)
1706 CompiledIC* inline_cache = CompiledIC_at(caller_nm, call_addr);
1707 inline_cache->set_to_clean();
1708 break;
1709 }
1710 default:
1711 break;
1712 }
1713 }
1714 }
1715 }
1716
1717 methodHandle callee_method = find_callee_method(CHECK_(methodHandle()));
1718
1719
1720 #ifndef PRODUCT
1721 AtomicAccess::inc(&_wrong_method_ctr);
1722
1723 if (TraceCallFixup) {
1724 ResourceMark rm(current);
1725 tty->print("handle_wrong_method reresolving call to");
1726 callee_method->print_short_name(tty);
1727 tty->print_cr(" code: " INTPTR_FORMAT, p2i(callee_method->code()));
1728 }
1729 #endif
1730
1731 return callee_method;
1732 }
1733
1734 address SharedRuntime::handle_unsafe_access(JavaThread* thread, address next_pc) {
1735 // The faulting unsafe accesses should be changed to throw the error
1736 // synchronously instead. Meanwhile the faulting instruction will be
1737 // skipped over (effectively turning it into a no-op) and an
1738 // asynchronous exception will be raised which the thread will
1739 // handle at a later point. If the instruction is a load it will
1740 // return garbage.
1741
1742 // Request an async exception.
1743 thread->set_pending_unsafe_access_error();
1744
1745 // Return address of next instruction to execute.
1911 msglen += strlen(caster_klass_description) + strlen(target_klass_description) + strlen(klass_separator) + 3;
1912
1913 char* message = NEW_RESOURCE_ARRAY_RETURN_NULL(char, msglen);
1914 if (message == nullptr) {
1915 // Shouldn't happen, but don't cause even more problems if it does
1916 message = const_cast<char*>(caster_klass->external_name());
1917 } else {
1918 jio_snprintf(message,
1919 msglen,
1920 "class %s cannot be cast to class %s (%s%s%s)",
1921 caster_name,
1922 target_name,
1923 caster_klass_description,
1924 klass_separator,
1925 target_klass_description
1926 );
1927 }
1928 return message;
1929 }
1930
1931 JRT_LEAF(void, SharedRuntime::reguard_yellow_pages())
1932 (void) JavaThread::current()->stack_overflow_state()->reguard_stack();
1933 JRT_END
1934
1935 void SharedRuntime::monitor_enter_helper(oopDesc* obj, BasicLock* lock, JavaThread* current) {
1936 if (!SafepointSynchronize::is_synchronizing()) {
1937 // Only try quick_enter() if we're not trying to reach a safepoint
1938 // so that the calling thread reaches the safepoint more quickly.
1939 if (ObjectSynchronizer::quick_enter(obj, lock, current)) {
1940 return;
1941 }
1942 }
1943 // NO_ASYNC required because an async exception on the state transition destructor
1944 // would leave you with the lock held and it would never be released.
1945 // The normal monitorenter NullPointerException is thrown without acquiring a lock
1946 // and the model is that an exception implies the method failed.
1947 JRT_BLOCK_NO_ASYNC
1948 Handle h_obj(THREAD, obj);
1949 ObjectSynchronizer::enter(h_obj, lock, current);
1950 assert(!HAS_PENDING_EXCEPTION, "Should have no exception here");
2144 tty->print_cr("Note 1: counter updates are not MT-safe.");
2145 tty->print_cr("Note 2: %% in major categories are relative to total non-inlined calls;");
2146 tty->print_cr(" %% in nested categories are relative to their category");
2147 tty->print_cr(" (and thus add up to more than 100%% with inlining)");
2148 tty->cr();
2149
2150 MethodArityHistogram h;
2151 }
2152 #endif
2153
2154 #ifndef PRODUCT
2155 static int _lookups; // number of calls to lookup
2156 static int _equals; // number of buckets checked with matching hash
2157 static int _archived_hits; // number of successful lookups in archived table
2158 static int _runtime_hits; // number of successful lookups in runtime table
2159 #endif
2160
2161 // A simple wrapper class around the calling convention information
2162 // that allows sharing of adapters for the same calling convention.
2163 class AdapterFingerPrint : public MetaspaceObj {
2164 private:
2165 enum {
2166 _basic_type_bits = 4,
2167 _basic_type_mask = right_n_bits(_basic_type_bits),
2168 _basic_types_per_int = BitsPerInt / _basic_type_bits,
2169 };
2170 // TO DO: Consider integrating this with a more global scheme for compressing signatures.
2171 // For now, 4 bits per components (plus T_VOID gaps after double/long) is not excessive.
2172
2173 int _length;
2174
2175 static int data_offset() { return sizeof(AdapterFingerPrint); }
2176 int* data_pointer() {
2177 return (int*)((address)this + data_offset());
2178 }
2179
2180 // Private construtor. Use allocate() to get an instance.
2181 AdapterFingerPrint(int total_args_passed, BasicType* sig_bt, int len) {
2182 int* data = data_pointer();
2183 // Pack the BasicTypes with 8 per int
2184 assert(len == length(total_args_passed), "sanity");
2185 _length = len;
2186 int sig_index = 0;
2187 for (int index = 0; index < _length; index++) {
2188 int value = 0;
2189 for (int byte = 0; sig_index < total_args_passed && byte < _basic_types_per_int; byte++) {
2190 int bt = adapter_encoding(sig_bt[sig_index++]);
2191 assert((bt & _basic_type_mask) == bt, "must fit in 4 bits");
2192 value = (value << _basic_type_bits) | bt;
2193 }
2194 data[index] = value;
2195 }
2196 }
2197
2198 // Call deallocate instead
2199 ~AdapterFingerPrint() {
2200 ShouldNotCallThis();
2201 }
2202
2203 static int length(int total_args) {
2204 return (total_args + (_basic_types_per_int-1)) / _basic_types_per_int;
2205 }
2206
2207 static int compute_size_in_words(int len) {
2208 return (int)heap_word_size(sizeof(AdapterFingerPrint) + (len * sizeof(int)));
2209 }
2210
2211 // Remap BasicTypes that are handled equivalently by the adapters.
2212 // These are correct for the current system but someday it might be
2213 // necessary to make this mapping platform dependent.
2214 static int adapter_encoding(BasicType in) {
2215 switch (in) {
2216 case T_BOOLEAN:
2217 case T_BYTE:
2218 case T_SHORT:
2219 case T_CHAR:
2220 // There are all promoted to T_INT in the calling convention
2221 return T_INT;
2222
2223 case T_OBJECT:
2224 case T_ARRAY:
2225 // In other words, we assume that any register good enough for
2226 // an int or long is good enough for a managed pointer.
2227 #ifdef _LP64
2228 return T_LONG;
2229 #else
2230 return T_INT;
2231 #endif
2232
2233 case T_INT:
2234 case T_LONG:
2235 case T_FLOAT:
2236 case T_DOUBLE:
2237 case T_VOID:
2238 return in;
2239
2240 default:
2241 ShouldNotReachHere();
2242 return T_CONFLICT;
2243 }
2244 }
2245
2246 void* operator new(size_t size, size_t fp_size) throw() {
2247 assert(fp_size >= size, "sanity check");
2248 void* p = AllocateHeap(fp_size, mtCode);
2249 memset(p, 0, fp_size);
2250 return p;
2251 }
2252
2253 template<typename Function>
2254 void iterate_args(Function function) {
2255 for (int i = 0; i < length(); i++) {
2256 unsigned val = (unsigned)value(i);
2257 // args are packed so that first/lower arguments are in the highest
2258 // bits of each int value, so iterate from highest to the lowest
2259 for (int j = 32 - _basic_type_bits; j >= 0; j -= _basic_type_bits) {
2260 unsigned v = (val >> j) & _basic_type_mask;
2261 if (v == 0) {
2262 continue;
2263 }
2264 function(v);
2265 }
2266 }
2267 }
2268
2269 public:
2270 static AdapterFingerPrint* allocate(int total_args_passed, BasicType* sig_bt) {
2271 int len = length(total_args_passed);
2272 int size_in_bytes = BytesPerWord * compute_size_in_words(len);
2273 AdapterFingerPrint* afp = new (size_in_bytes) AdapterFingerPrint(total_args_passed, sig_bt, len);
2274 assert((afp->size() * BytesPerWord) == size_in_bytes, "should match");
2275 return afp;
2276 }
2277
2278 static void deallocate(AdapterFingerPrint* fp) {
2279 FreeHeap(fp);
2280 }
2281
2282 int value(int index) {
2283 int* data = data_pointer();
2284 return data[index];
2285 }
2286
2287 int length() {
2288 return _length;
2289 }
2290
2291 unsigned int compute_hash() {
2292 int hash = 0;
2293 for (int i = 0; i < length(); i++) {
2294 int v = value(i);
2295 //Add arithmetic operation to the hash, like +3 to improve hashing
2296 hash = ((hash << 8) ^ v ^ (hash >> 5)) + 3;
2297 }
2298 return (unsigned int)hash;
2299 }
2300
2301 const char* as_string() {
2302 stringStream st;
2303 st.print("0x");
2304 for (int i = 0; i < length(); i++) {
2305 st.print("%x", value(i));
2306 }
2307 return st.as_string();
2308 }
2309
2310 const char* as_basic_args_string() {
2311 stringStream st;
2312 bool long_prev = false;
2313 iterate_args([&] (int arg) {
2314 if (long_prev) {
2315 long_prev = false;
2316 if (arg == T_VOID) {
2317 st.print("J");
2318 } else {
2319 st.print("L");
2320 }
2321 }
2322 switch (arg) {
2323 case T_INT: st.print("I"); break;
2324 case T_LONG: long_prev = true; break;
2325 case T_FLOAT: st.print("F"); break;
2326 case T_DOUBLE: st.print("D"); break;
2327 case T_VOID: break;
2328 default: ShouldNotReachHere();
2329 }
2330 });
2331 if (long_prev) {
2332 st.print("L");
2333 }
2334 return st.as_string();
2335 }
2336
2337 BasicType* as_basic_type(int& nargs) {
2338 nargs = 0;
2339 GrowableArray<BasicType> btarray;
2340 bool long_prev = false;
2341
2342 iterate_args([&] (int arg) {
2343 if (long_prev) {
2344 long_prev = false;
2345 if (arg == T_VOID) {
2346 btarray.append(T_LONG);
2347 } else {
2348 btarray.append(T_OBJECT); // it could be T_ARRAY; it shouldn't matter
2349 }
2350 }
2351 switch (arg) {
2352 case T_INT: // fallthrough
2353 case T_FLOAT: // fallthrough
2354 case T_DOUBLE:
2355 case T_VOID:
2356 btarray.append((BasicType)arg);
2357 break;
2358 case T_LONG:
2359 long_prev = true;
2360 break;
2361 default: ShouldNotReachHere();
2362 }
2363 });
2364
2365 if (long_prev) {
2366 btarray.append(T_OBJECT);
2367 }
2368
2369 nargs = btarray.length();
2370 BasicType* sig_bt = NEW_RESOURCE_ARRAY(BasicType, nargs);
2371 int index = 0;
2372 GrowableArrayIterator<BasicType> iter = btarray.begin();
2373 while (iter != btarray.end()) {
2374 sig_bt[index++] = *iter;
2375 ++iter;
2376 }
2377 assert(index == btarray.length(), "sanity check");
2378 #ifdef ASSERT
2379 {
2380 AdapterFingerPrint* compare_fp = AdapterFingerPrint::allocate(nargs, sig_bt);
2381 assert(this->equals(compare_fp), "sanity check");
2382 AdapterFingerPrint::deallocate(compare_fp);
2383 }
2384 #endif
2385 return sig_bt;
2386 }
2387
2388 bool equals(AdapterFingerPrint* other) {
2389 if (other->_length != _length) {
2390 return false;
2391 } else {
2392 for (int i = 0; i < _length; i++) {
2393 if (value(i) != other->value(i)) {
2394 return false;
2395 }
2396 }
2397 }
2398 return true;
2399 }
2400
2401 // methods required by virtue of being a MetaspaceObj
2402 void metaspace_pointers_do(MetaspaceClosure* it) { return; /* nothing to do here */ }
2403 int size() const { return compute_size_in_words(_length); }
2404 MetaspaceObj::Type type() const { return AdapterFingerPrintType; }
2405
2406 static bool equals(AdapterFingerPrint* const& fp1, AdapterFingerPrint* const& fp2) {
2407 NOT_PRODUCT(_equals++);
2408 return fp1->equals(fp2);
2409 }
2410
2411 static unsigned int compute_hash(AdapterFingerPrint* const& fp) {
2412 return fp->compute_hash();
2413 }
2416 #if INCLUDE_CDS
2417 static inline bool adapter_fp_equals_compact_hashtable_entry(AdapterHandlerEntry* entry, AdapterFingerPrint* fp, int len_unused) {
2418 return AdapterFingerPrint::equals(entry->fingerprint(), fp);
2419 }
2420
2421 class ArchivedAdapterTable : public OffsetCompactHashtable<
2422 AdapterFingerPrint*,
2423 AdapterHandlerEntry*,
2424 adapter_fp_equals_compact_hashtable_entry> {};
2425 #endif // INCLUDE_CDS
2426
2427 // A hashtable mapping from AdapterFingerPrints to AdapterHandlerEntries
2428 using AdapterHandlerTable = HashTable<AdapterFingerPrint*, AdapterHandlerEntry*, 293,
2429 AnyObj::C_HEAP, mtCode,
2430 AdapterFingerPrint::compute_hash,
2431 AdapterFingerPrint::equals>;
2432 static AdapterHandlerTable* _adapter_handler_table;
2433 static GrowableArray<AdapterHandlerEntry*>* _adapter_handler_list = nullptr;
2434
2435 // Find a entry with the same fingerprint if it exists
2436 AdapterHandlerEntry* AdapterHandlerLibrary::lookup(int total_args_passed, BasicType* sig_bt) {
2437 NOT_PRODUCT(_lookups++);
2438 assert_lock_strong(AdapterHandlerLibrary_lock);
2439 AdapterFingerPrint* fp = AdapterFingerPrint::allocate(total_args_passed, sig_bt);
2440 AdapterHandlerEntry* entry = nullptr;
2441 #if INCLUDE_CDS
2442 // if we are building the archive then the archived adapter table is
2443 // not valid and we need to use the ones added to the runtime table
2444 if (AOTCodeCache::is_using_adapter()) {
2445 // Search archived table first. It is read-only table so can be searched without lock
2446 entry = _aot_adapter_handler_table.lookup(fp, fp->compute_hash(), 0 /* unused */);
2447 #ifndef PRODUCT
2448 if (entry != nullptr) {
2449 _archived_hits++;
2450 }
2451 #endif
2452 }
2453 #endif // INCLUDE_CDS
2454 if (entry == nullptr) {
2455 assert_lock_strong(AdapterHandlerLibrary_lock);
2456 AdapterHandlerEntry** entry_p = _adapter_handler_table->get(fp);
2457 if (entry_p != nullptr) {
2458 entry = *entry_p;
2459 assert(entry->fingerprint()->equals(fp), "fingerprint mismatch key fp %s %s (hash=%d) != found fp %s %s (hash=%d)",
2476 TableStatistics ts = _adapter_handler_table->statistics_calculate(size);
2477 ts.print(tty, "AdapterHandlerTable");
2478 tty->print_cr("AdapterHandlerTable (table_size=%d, entries=%d)",
2479 _adapter_handler_table->table_size(), _adapter_handler_table->number_of_entries());
2480 int total_hits = _archived_hits + _runtime_hits;
2481 tty->print_cr("AdapterHandlerTable: lookups %d equals %d hits %d (archived=%d+runtime=%d)",
2482 _lookups, _equals, total_hits, _archived_hits, _runtime_hits);
2483 }
2484 #endif
2485
2486 // ---------------------------------------------------------------------------
2487 // Implementation of AdapterHandlerLibrary
2488 AdapterHandlerEntry* AdapterHandlerLibrary::_no_arg_handler = nullptr;
2489 AdapterHandlerEntry* AdapterHandlerLibrary::_int_arg_handler = nullptr;
2490 AdapterHandlerEntry* AdapterHandlerLibrary::_obj_arg_handler = nullptr;
2491 AdapterHandlerEntry* AdapterHandlerLibrary::_obj_int_arg_handler = nullptr;
2492 AdapterHandlerEntry* AdapterHandlerLibrary::_obj_obj_arg_handler = nullptr;
2493 #if INCLUDE_CDS
2494 ArchivedAdapterTable AdapterHandlerLibrary::_aot_adapter_handler_table;
2495 #endif // INCLUDE_CDS
2496 static const int AdapterHandlerLibrary_size = 16*K;
2497 BufferBlob* AdapterHandlerLibrary::_buffer = nullptr;
2498 volatile uint AdapterHandlerLibrary::_id_counter = 0;
2499
2500 BufferBlob* AdapterHandlerLibrary::buffer_blob() {
2501 assert(_buffer != nullptr, "should be initialized");
2502 return _buffer;
2503 }
2504
2505 static void post_adapter_creation(const AdapterHandlerEntry* entry) {
2506 if (Forte::is_enabled() || JvmtiExport::should_post_dynamic_code_generated()) {
2507 AdapterBlob* adapter_blob = entry->adapter_blob();
2508 char blob_id[256];
2509 jio_snprintf(blob_id,
2510 sizeof(blob_id),
2511 "%s(%s)",
2512 adapter_blob->name(),
2513 entry->fingerprint()->as_string());
2514 if (Forte::is_enabled()) {
2515 Forte::register_stub(blob_id, adapter_blob->content_begin(), adapter_blob->content_end());
2516 }
2524 void AdapterHandlerLibrary::initialize() {
2525 {
2526 ResourceMark rm;
2527 _adapter_handler_table = new (mtCode) AdapterHandlerTable();
2528 _buffer = BufferBlob::create("adapters", AdapterHandlerLibrary_size);
2529 }
2530
2531 #if INCLUDE_CDS
2532 // Link adapters in AOT Cache to their code in AOT Code Cache
2533 if (AOTCodeCache::is_using_adapter() && !_aot_adapter_handler_table.empty()) {
2534 link_aot_adapters();
2535 lookup_simple_adapters();
2536 return;
2537 }
2538 #endif // INCLUDE_CDS
2539
2540 ResourceMark rm;
2541 {
2542 MutexLocker mu(AdapterHandlerLibrary_lock);
2543
2544 _no_arg_handler = create_adapter(0, nullptr);
2545
2546 BasicType obj_args[] = { T_OBJECT };
2547 _obj_arg_handler = create_adapter(1, obj_args);
2548
2549 BasicType int_args[] = { T_INT };
2550 _int_arg_handler = create_adapter(1, int_args);
2551
2552 BasicType obj_int_args[] = { T_OBJECT, T_INT };
2553 _obj_int_arg_handler = create_adapter(2, obj_int_args);
2554
2555 BasicType obj_obj_args[] = { T_OBJECT, T_OBJECT };
2556 _obj_obj_arg_handler = create_adapter(2, obj_obj_args);
2557
2558 // we should always get an entry back but we don't have any
2559 // associated blob on Zero
2560 assert(_no_arg_handler != nullptr &&
2561 _obj_arg_handler != nullptr &&
2562 _int_arg_handler != nullptr &&
2563 _obj_int_arg_handler != nullptr &&
2564 _obj_obj_arg_handler != nullptr, "Initial adapter handlers must be properly created");
2565 }
2566
2567 // Outside of the lock
2568 #ifndef ZERO
2569 // no blobs to register when we are on Zero
2570 post_adapter_creation(_no_arg_handler);
2571 post_adapter_creation(_obj_arg_handler);
2572 post_adapter_creation(_int_arg_handler);
2573 post_adapter_creation(_obj_int_arg_handler);
2574 post_adapter_creation(_obj_obj_arg_handler);
2575 #endif // ZERO
2576 }
2577
2578 AdapterHandlerEntry* AdapterHandlerLibrary::new_entry(AdapterFingerPrint* fingerprint) {
2579 uint id = (uint)AtomicAccess::add((int*)&_id_counter, 1);
2580 assert(id > 0, "we can never overflow because AOT cache cannot contain more than 2^32 methods");
2581 return AdapterHandlerEntry::allocate(id, fingerprint);
2582 }
2583
2584 AdapterHandlerEntry* AdapterHandlerLibrary::get_simple_adapter(const methodHandle& method) {
2585 int total_args_passed = method->size_of_parameters(); // All args on stack
2586 if (total_args_passed == 0) {
2587 return _no_arg_handler;
2588 } else if (total_args_passed == 1) {
2589 if (!method->is_static()) {
2590 return _obj_arg_handler;
2591 }
2592 switch (method->signature()->char_at(1)) {
2593 case JVM_SIGNATURE_CLASS:
2594 case JVM_SIGNATURE_ARRAY:
2595 return _obj_arg_handler;
2596 case JVM_SIGNATURE_INT:
2597 case JVM_SIGNATURE_BOOLEAN:
2598 case JVM_SIGNATURE_CHAR:
2599 case JVM_SIGNATURE_BYTE:
2600 case JVM_SIGNATURE_SHORT:
2601 return _int_arg_handler;
2602 }
2603 } else if (total_args_passed == 2 &&
2604 !method->is_static()) {
2605 switch (method->signature()->char_at(1)) {
2606 case JVM_SIGNATURE_CLASS:
2607 case JVM_SIGNATURE_ARRAY:
2608 return _obj_obj_arg_handler;
2609 case JVM_SIGNATURE_INT:
2610 case JVM_SIGNATURE_BOOLEAN:
2611 case JVM_SIGNATURE_CHAR:
2612 case JVM_SIGNATURE_BYTE:
2613 case JVM_SIGNATURE_SHORT:
2614 return _obj_int_arg_handler;
2615 }
2616 }
2617 return nullptr;
2618 }
2619
2620 class AdapterSignatureIterator : public SignatureIterator {
2621 private:
2622 BasicType stack_sig_bt[16];
2623 BasicType* sig_bt;
2624 int index;
2625
2626 public:
2627 AdapterSignatureIterator(Symbol* signature,
2628 fingerprint_t fingerprint,
2629 bool is_static,
2630 int total_args_passed) :
2631 SignatureIterator(signature, fingerprint),
2632 index(0)
2633 {
2634 sig_bt = (total_args_passed <= 16) ? stack_sig_bt : NEW_RESOURCE_ARRAY(BasicType, total_args_passed);
2635 if (!is_static) { // Pass in receiver first
2636 sig_bt[index++] = T_OBJECT;
2637 }
2638 do_parameters_on(this);
2639 }
2640
2641 BasicType* basic_types() {
2642 return sig_bt;
2643 }
2644
2645 #ifdef ASSERT
2646 int slots() {
2647 return index;
2648 }
2649 #endif
2650
2651 private:
2652
2653 friend class SignatureIterator; // so do_parameters_on can call do_type
2654 void do_type(BasicType type) {
2655 sig_bt[index++] = type;
2656 if (type == T_LONG || type == T_DOUBLE) {
2657 sig_bt[index++] = T_VOID; // Longs & doubles take 2 Java slots
2658 }
2659 }
2660 };
2661
2662
2663 const char* AdapterHandlerEntry::_entry_names[] = {
2664 "i2c", "c2i", "c2i_unverified", "c2i_no_clinit_check"
2665 };
2666
2667 #ifdef ASSERT
2668 void AdapterHandlerLibrary::verify_adapter_sharing(int total_args_passed, BasicType* sig_bt, AdapterHandlerEntry* cached_entry) {
2669 // we can only check for the same code if there is any
2670 #ifndef ZERO
2671 AdapterHandlerEntry* comparison_entry = create_adapter(total_args_passed, sig_bt, true);
2672 assert(comparison_entry->adapter_blob() == nullptr, "no blob should be created when creating an adapter for comparison");
2673 assert(comparison_entry->compare_code(cached_entry), "code must match");
2674 // Release the one just created
2675 AdapterHandlerEntry::deallocate(comparison_entry);
2676 # endif // ZERO
2677 }
2678 #endif /* ASSERT*/
2679
2680 AdapterHandlerEntry* AdapterHandlerLibrary::get_adapter(const methodHandle& method) {
2681 assert(!method->is_abstract(), "abstract methods do not have adapters");
2682 // Use customized signature handler. Need to lock around updates to
2683 // the _adapter_handler_table (it is not safe for concurrent readers
2684 // and a single writer: this could be fixed if it becomes a
2685 // problem).
2686
2687 // Fast-path for trivial adapters
2688 AdapterHandlerEntry* entry = get_simple_adapter(method);
2689 if (entry != nullptr) {
2690 return entry;
2691 }
2692
2693 ResourceMark rm;
2694 bool new_entry = false;
2695
2696 // Fill in the signature array, for the calling-convention call.
2697 int total_args_passed = method->size_of_parameters(); // All args on stack
2698
2699 AdapterSignatureIterator si(method->signature(), method->constMethod()->fingerprint(),
2700 method->is_static(), total_args_passed);
2701 assert(si.slots() == total_args_passed, "");
2702 BasicType* sig_bt = si.basic_types();
2703 {
2704 MutexLocker mu(AdapterHandlerLibrary_lock);
2705
2706 // Lookup method signature's fingerprint
2707 entry = lookup(total_args_passed, sig_bt);
2708
2709 if (entry != nullptr) {
2710 #ifndef ZERO
2711 assert(entry->is_linked(), "AdapterHandlerEntry must have been linked");
2712 #endif
2713 #ifdef ASSERT
2714 if (!entry->in_aot_cache() && VerifyAdapterSharing) {
2715 verify_adapter_sharing(total_args_passed, sig_bt, entry);
2716 }
2717 #endif
2718 } else {
2719 entry = create_adapter(total_args_passed, sig_bt);
2720 if (entry != nullptr) {
2721 new_entry = true;
2722 }
2723 }
2724 }
2725
2726 // Outside of the lock
2727 if (new_entry) {
2728 post_adapter_creation(entry);
2729 }
2730 return entry;
2731 }
2732
2733 void AdapterHandlerLibrary::lookup_aot_cache(AdapterHandlerEntry* handler) {
2734 ResourceMark rm;
2735 const char* name = AdapterHandlerLibrary::name(handler);
2736 const uint32_t id = AdapterHandlerLibrary::id(handler);
2737
2738 CodeBlob* blob = AOTCodeCache::load_code_blob(AOTCodeEntry::Adapter, id, name);
2739 if (blob != nullptr) {
2754 }
2755 insts_size = adapter_blob->code_size();
2756 st->print_cr("i2c argument handler for: %s %s (%d bytes generated)",
2757 handler->fingerprint()->as_basic_args_string(),
2758 handler->fingerprint()->as_string(), insts_size);
2759 st->print_cr("c2i argument handler starts at " INTPTR_FORMAT, p2i(handler->get_c2i_entry()));
2760 if (Verbose || PrintStubCode) {
2761 address first_pc = adapter_blob->content_begin();
2762 if (first_pc != nullptr) {
2763 Disassembler::decode(first_pc, first_pc + insts_size, st, &adapter_blob->asm_remarks());
2764 st->cr();
2765 }
2766 }
2767 }
2768 #endif // PRODUCT
2769
2770 void AdapterHandlerLibrary::address_to_offset(address entry_address[AdapterBlob::ENTRY_COUNT],
2771 int entry_offset[AdapterBlob::ENTRY_COUNT]) {
2772 entry_offset[AdapterBlob::I2C] = 0;
2773 entry_offset[AdapterBlob::C2I] = entry_address[AdapterBlob::C2I] - entry_address[AdapterBlob::I2C];
2774 entry_offset[AdapterBlob::C2I_Unverified] = entry_address[AdapterBlob::C2I_Unverified] - entry_address[AdapterBlob::I2C];
2775 if (entry_address[AdapterBlob::C2I_No_Clinit_Check] == nullptr) {
2776 entry_offset[AdapterBlob::C2I_No_Clinit_Check] = -1;
2777 } else {
2778 entry_offset[AdapterBlob::C2I_No_Clinit_Check] = entry_address[AdapterBlob::C2I_No_Clinit_Check] - entry_address[AdapterBlob::I2C];
2779 }
2780 }
2781
2782 bool AdapterHandlerLibrary::generate_adapter_code(AdapterHandlerEntry* handler,
2783 int total_args_passed,
2784 BasicType* sig_bt,
2785 bool is_transient) {
2786 if (log_is_enabled(Info, perf, class, link)) {
2787 ClassLoader::perf_method_adapters_count()->inc();
2788 }
2789
2790 #ifndef ZERO
2791 BufferBlob* buf = buffer_blob(); // the temporary code buffer in CodeCache
2792 CodeBuffer buffer(buf);
2793 short buffer_locs[20];
2794 buffer.insts()->initialize_shared_locs((relocInfo*)buffer_locs,
2795 sizeof(buffer_locs)/sizeof(relocInfo));
2796 MacroAssembler masm(&buffer);
2797 VMRegPair stack_regs[16];
2798 VMRegPair* regs = (total_args_passed <= 16) ? stack_regs : NEW_RESOURCE_ARRAY(VMRegPair, total_args_passed);
2799
2800 // Get a description of the compiled java calling convention and the largest used (VMReg) stack slot usage
2801 int comp_args_on_stack = SharedRuntime::java_calling_convention(sig_bt, regs, total_args_passed);
2802 address entry_address[AdapterBlob::ENTRY_COUNT];
2803 SharedRuntime::generate_i2c2i_adapters(&masm,
2804 total_args_passed,
2805 comp_args_on_stack,
2806 sig_bt,
2807 regs,
2808 entry_address);
2809 // On zero there is no code to save and no need to create a blob and
2810 // or relocate the handler.
2811 int entry_offset[AdapterBlob::ENTRY_COUNT];
2812 address_to_offset(entry_address, entry_offset);
2813 #ifdef ASSERT
2814 if (VerifyAdapterSharing) {
2815 handler->save_code(buf->code_begin(), buffer.insts_size());
2816 if (is_transient) {
2817 return true;
2818 }
2819 }
2820 #endif
2821 AdapterBlob* adapter_blob = AdapterBlob::create(&buffer, entry_offset);
2822 if (adapter_blob == nullptr) {
2823 // CodeCache is full, disable compilation
2824 // Ought to log this but compile log is only per compile thread
2825 // and we're some non descript Java thread.
2826 return false;
2827 }
2828 handler->set_adapter_blob(adapter_blob);
2829 if (!is_transient && AOTCodeCache::is_dumping_adapter()) {
2830 // try to save generated code
2831 const char* name = AdapterHandlerLibrary::name(handler);
2832 const uint32_t id = AdapterHandlerLibrary::id(handler);
2833 bool success = AOTCodeCache::store_code_blob(*adapter_blob, AOTCodeEntry::Adapter, id, name);
2834 assert(success || !AOTCodeCache::is_dumping_adapter(), "caching of adapter must be disabled");
2835 }
2836 #endif // ZERO
2837
2838 #ifndef PRODUCT
2839 // debugging support
2840 if (PrintAdapterHandlers || PrintStubCode) {
2841 print_adapter_handler_info(tty, handler);
2842 }
2843 #endif
2844
2845 return true;
2846 }
2847
2848 AdapterHandlerEntry* AdapterHandlerLibrary::create_adapter(int total_args_passed,
2849 BasicType* sig_bt,
2850 bool is_transient) {
2851 AdapterFingerPrint* fp = AdapterFingerPrint::allocate(total_args_passed, sig_bt);
2852 AdapterHandlerEntry* handler = AdapterHandlerLibrary::new_entry(fp);
2853 if (!generate_adapter_code(handler, total_args_passed, sig_bt, is_transient)) {
2854 AdapterHandlerEntry::deallocate(handler);
2855 return nullptr;
2856 }
2857 if (!is_transient) {
2858 assert_lock_strong(AdapterHandlerLibrary_lock);
2859 _adapter_handler_table->put(fp, handler);
2860 }
2861 return handler;
2862 }
2863
2864 #if INCLUDE_CDS
2865 void AdapterHandlerEntry::remove_unshareable_info() {
2866 #ifdef ASSERT
2867 _saved_code = nullptr;
2868 _saved_code_length = 0;
2869 #endif // ASSERT
2870 _adapter_blob = nullptr;
2871 _linked = false;
2872 }
2873
2874 class CopyAdapterTableToArchive : StackObj {
2875 private:
2876 CompactHashtableWriter* _writer;
2877 ArchiveBuilder* _builder;
2878 public:
2879 CopyAdapterTableToArchive(CompactHashtableWriter* writer) : _writer(writer),
2880 _builder(ArchiveBuilder::current())
2881 {}
2882
2883 bool do_entry(AdapterFingerPrint* fp, AdapterHandlerEntry* entry) {
2884 LogStreamHandle(Trace, aot) lsh;
2885 if (ArchiveBuilder::current()->has_been_archived((address)entry)) {
2886 assert(ArchiveBuilder::current()->has_been_archived((address)fp), "must be");
2887 AdapterFingerPrint* buffered_fp = ArchiveBuilder::current()->get_buffered_addr(fp);
2888 assert(buffered_fp != nullptr,"sanity check");
2889 AdapterHandlerEntry* buffered_entry = ArchiveBuilder::current()->get_buffered_addr(entry);
2890 assert(buffered_entry != nullptr,"sanity check");
2891
2931 }
2932 #endif
2933 }
2934
2935 // This method is used during production run to link archived adapters (stored in AOT Cache)
2936 // to their code in AOT Code Cache
2937 void AdapterHandlerEntry::link() {
2938 ResourceMark rm;
2939 assert(_fingerprint != nullptr, "_fingerprint must not be null");
2940 bool generate_code = false;
2941 // Generate code only if AOTCodeCache is not available, or
2942 // caching adapters is disabled, or we fail to link
2943 // the AdapterHandlerEntry to its code in the AOTCodeCache
2944 if (AOTCodeCache::is_using_adapter()) {
2945 AdapterHandlerLibrary::link_aot_adapter_handler(this);
2946 // If link_aot_adapter_handler() succeeds, _adapter_blob will be non-null
2947 if (_adapter_blob == nullptr) {
2948 log_warning(aot)("Failed to link AdapterHandlerEntry (fp=%s) to its code in the AOT code cache", _fingerprint->as_basic_args_string());
2949 generate_code = true;
2950 }
2951 } else {
2952 generate_code = true;
2953 }
2954 if (generate_code) {
2955 int nargs;
2956 BasicType* bt = _fingerprint->as_basic_type(nargs);
2957 if (!AdapterHandlerLibrary::generate_adapter_code(this, nargs, bt, /* is_transient */ false)) {
2958 // Don't throw exceptions during VM initialization because java.lang.* classes
2959 // might not have been initialized, causing problems when constructing the
2960 // Java exception object.
2961 vm_exit_during_initialization("Out of space in CodeCache for adapters");
2962 }
2963 }
2964 if (_adapter_blob != nullptr) {
2965 post_adapter_creation(this);
2966 }
2967 assert(_linked, "AdapterHandlerEntry must now be linked");
2968 }
2969
2970 void AdapterHandlerLibrary::link_aot_adapters() {
2971 uint max_id = 0;
2972 assert(AOTCodeCache::is_using_adapter(), "AOT adapters code should be available");
2973 /* It is possible that some adapters generated in assembly phase are not stored in the cache.
2974 * That implies adapter ids of the adapters in the cache may not be contiguous.
2975 * If the size of the _aot_adapter_handler_table is used to initialize _id_counter, then it may
2976 * result in collision of adapter ids between AOT stored handlers and runtime generated handlers.
2977 * To avoid such situation, initialize the _id_counter with the largest adapter id among the AOT stored handlers.
2978 */
2979 _aot_adapter_handler_table.iterate_all([&](AdapterHandlerEntry* entry) {
2980 assert(!entry->is_linked(), "AdapterHandlerEntry is already linked!");
2981 entry->link();
2982 max_id = MAX2(max_id, entry->id());
2983 });
2984 // Set adapter id to the maximum id found in the AOTCache
2985 assert(_id_counter == 0, "Did not expect new AdapterHandlerEntry to be created at this stage");
2986 _id_counter = max_id;
2987 }
2988
2989 // This method is called during production run to lookup simple adapters
2990 // in the archived adapter handler table
2991 void AdapterHandlerLibrary::lookup_simple_adapters() {
2992 assert(!_aot_adapter_handler_table.empty(), "archived adapter handler table is empty");
2993
2994 MutexLocker mu(AdapterHandlerLibrary_lock);
2995 _no_arg_handler = lookup(0, nullptr);
2996
2997 BasicType obj_args[] = { T_OBJECT };
2998 _obj_arg_handler = lookup(1, obj_args);
2999
3000 BasicType int_args[] = { T_INT };
3001 _int_arg_handler = lookup(1, int_args);
3002
3003 BasicType obj_int_args[] = { T_OBJECT, T_INT };
3004 _obj_int_arg_handler = lookup(2, obj_int_args);
3005
3006 BasicType obj_obj_args[] = { T_OBJECT, T_OBJECT };
3007 _obj_obj_arg_handler = lookup(2, obj_obj_args);
3008
3009 assert(_no_arg_handler != nullptr &&
3010 _obj_arg_handler != nullptr &&
3011 _int_arg_handler != nullptr &&
3012 _obj_int_arg_handler != nullptr &&
3013 _obj_obj_arg_handler != nullptr, "Initial adapters not found in archived adapter handler table");
3014 assert(_no_arg_handler->is_linked() &&
3015 _obj_arg_handler->is_linked() &&
3016 _int_arg_handler->is_linked() &&
3017 _obj_int_arg_handler->is_linked() &&
3018 _obj_obj_arg_handler->is_linked(), "Initial adapters not in linked state");
3019 }
3020 #endif // INCLUDE_CDS
3021
3022 void AdapterHandlerEntry::metaspace_pointers_do(MetaspaceClosure* it) {
3023 LogStreamHandle(Trace, aot) lsh;
3024 if (lsh.is_enabled()) {
3025 lsh.print("Iter(AdapterHandlerEntry): %p(%s)", this, _fingerprint->as_basic_args_string());
3026 lsh.cr();
3027 }
3028 it->push(&_fingerprint);
3029 }
3030
3031 AdapterHandlerEntry::~AdapterHandlerEntry() {
3032 if (_fingerprint != nullptr) {
3033 AdapterFingerPrint::deallocate(_fingerprint);
3034 _fingerprint = nullptr;
3035 }
3036 #ifdef ASSERT
3037 FREE_C_HEAP_ARRAY(_saved_code);
3038 #endif
3039 FreeHeap(this);
3040 }
3041
3042
3043 #ifdef ASSERT
3044 // Capture the code before relocation so that it can be compared
3045 // against other versions. If the code is captured after relocation
3046 // then relative instructions won't be equivalent.
3047 void AdapterHandlerEntry::save_code(unsigned char* buffer, int length) {
3048 _saved_code = NEW_C_HEAP_ARRAY(unsigned char, length, mtCode);
3049 _saved_code_length = length;
3050 memcpy(_saved_code, buffer, length);
3051 }
3052
3053
3054 bool AdapterHandlerEntry::compare_code(AdapterHandlerEntry* other) {
3055 assert(_saved_code != nullptr && other->_saved_code != nullptr, "code not saved");
3105 struct { double data[20]; } stubs_locs_buf;
3106 buffer.insts()->initialize_shared_locs((relocInfo*)&locs_buf, sizeof(locs_buf) / sizeof(relocInfo));
3107 #if defined(AARCH64)
3108 // On AArch64 with ZGC and nmethod entry barriers, we need all oops to be
3109 // in the constant pool to ensure ordering between the barrier and oops
3110 // accesses. For native_wrappers we need a constant.
3111 buffer.initialize_consts_size(8);
3112 #elif defined(PPC64) || defined(S390)
3113 // On PPC64/S390 the continuation enter intrinsic needs the constant pool for the compiled
3114 // static java call that is resolved in the runtime.
3115 if (method->is_continuation_enter_intrinsic()) {
3116 buffer.initialize_consts_size(8 PPC64_ONLY(+ 24) S390_ONLY(+ 17));
3117 }
3118 #endif
3119 buffer.stubs()->initialize_shared_locs((relocInfo*)&stubs_locs_buf, sizeof(stubs_locs_buf) / sizeof(relocInfo));
3120 MacroAssembler _masm(&buffer);
3121
3122 // Fill in the signature array, for the calling-convention call.
3123 const int total_args_passed = method->size_of_parameters();
3124
3125 VMRegPair stack_regs[16];
3126 VMRegPair* regs = (total_args_passed <= 16) ? stack_regs : NEW_RESOURCE_ARRAY(VMRegPair, total_args_passed);
3127
3128 AdapterSignatureIterator si(method->signature(), method->constMethod()->fingerprint(),
3129 method->is_static(), total_args_passed);
3130 BasicType* sig_bt = si.basic_types();
3131 assert(si.slots() == total_args_passed, "");
3132 BasicType ret_type = si.return_type();
3133
3134 // Now get the compiled-Java arguments layout.
3135 SharedRuntime::java_calling_convention(sig_bt, regs, total_args_passed);
3136
3137 // Generate the compiled-to-native wrapper code
3138 nm = SharedRuntime::generate_native_wrapper(&_masm, method, compile_id, sig_bt, regs, ret_type);
3139
3140 if (nm != nullptr) {
3141 {
3142 MutexLocker pl(NMethodState_lock, Mutex::_no_safepoint_check_flag);
3143 if (nm->make_in_use()) {
3144 method->set_code(method, nm);
3145 }
3146 }
3147
3148 CompilerDirectiveMatcher matcher(method, CompLevel_simple);
3149 if (matcher.directive_set()->PrintAssemblyOption) {
3150 nm->print_code();
3151 }
3152 }
3359 if (b == handler->adapter_blob()) {
3360 found = true;
3361 st->print("Adapter for signature: ");
3362 handler->print_adapter_on(st);
3363 return false; // abort iteration
3364 } else {
3365 return true; // keep looking
3366 }
3367 };
3368 assert_locked_or_safepoint(AdapterHandlerLibrary_lock);
3369 _adapter_handler_table->iterate(findblob_runtime_table);
3370 }
3371 assert(found, "Should have found handler");
3372 }
3373
3374 void AdapterHandlerEntry::print_adapter_on(outputStream* st) const {
3375 st->print("AHE@" INTPTR_FORMAT ": %s", p2i(this), fingerprint()->as_string());
3376 if (adapter_blob() != nullptr) {
3377 st->print(" i2c: " INTPTR_FORMAT, p2i(get_i2c_entry()));
3378 st->print(" c2i: " INTPTR_FORMAT, p2i(get_c2i_entry()));
3379 st->print(" c2iUV: " INTPTR_FORMAT, p2i(get_c2i_unverified_entry()));
3380 if (get_c2i_no_clinit_check_entry() != nullptr) {
3381 st->print(" c2iNCI: " INTPTR_FORMAT, p2i(get_c2i_no_clinit_check_entry()));
3382 }
3383 }
3384 st->cr();
3385 }
3386
3387 #ifndef PRODUCT
3388
3389 void AdapterHandlerLibrary::print_statistics() {
3390 print_table_statistics();
3391 }
3392
3393 #endif /* PRODUCT */
3394
3395 JRT_LEAF(void, SharedRuntime::enable_stack_reserved_zone(JavaThread* current))
3396 assert(current == JavaThread::current(), "pre-condition");
3397 StackOverflow* overflow_state = current->stack_overflow_state();
3398 overflow_state->enable_stack_reserved_zone(/*check_if_disabled*/true);
3399 overflow_state->set_reserved_stack_activation(current->stack_base());
3446 event.set_method(method);
3447 event.commit();
3448 }
3449 }
3450 }
3451 return activation;
3452 }
3453
3454 void SharedRuntime::on_slowpath_allocation_exit(JavaThread* current) {
3455 // After any safepoint, just before going back to compiled code,
3456 // we inform the GC that we will be doing initializing writes to
3457 // this object in the future without emitting card-marks, so
3458 // GC may take any compensating steps.
3459
3460 oop new_obj = current->vm_result_oop();
3461 if (new_obj == nullptr) return;
3462
3463 BarrierSet *bs = BarrierSet::barrier_set();
3464 bs->on_slowpath_allocation_exit(current, new_obj);
3465 }
|
30 #include "classfile/javaClasses.inline.hpp"
31 #include "classfile/stringTable.hpp"
32 #include "classfile/vmClasses.hpp"
33 #include "classfile/vmSymbols.hpp"
34 #include "code/aotCodeCache.hpp"
35 #include "code/codeCache.hpp"
36 #include "code/compiledIC.hpp"
37 #include "code/nmethod.inline.hpp"
38 #include "code/scopeDesc.hpp"
39 #include "code/vtableStubs.hpp"
40 #include "compiler/abstractCompiler.hpp"
41 #include "compiler/compileBroker.hpp"
42 #include "compiler/disassembler.hpp"
43 #include "gc/shared/barrierSet.hpp"
44 #include "gc/shared/collectedHeap.hpp"
45 #include "interpreter/interpreter.hpp"
46 #include "interpreter/interpreterRuntime.hpp"
47 #include "jfr/jfrEvents.hpp"
48 #include "jvm.h"
49 #include "logging/log.hpp"
50 #include "memory/oopFactory.hpp"
51 #include "memory/resourceArea.hpp"
52 #include "memory/universe.hpp"
53 #include "metaprogramming/primitiveConversions.hpp"
54 #include "oops/access.hpp"
55 #include "oops/fieldStreams.inline.hpp"
56 #include "oops/inlineKlass.inline.hpp"
57 #include "oops/klass.hpp"
58 #include "oops/method.inline.hpp"
59 #include "oops/objArrayKlass.hpp"
60 #include "oops/objArrayOop.inline.hpp"
61 #include "oops/oop.inline.hpp"
62 #include "prims/forte.hpp"
63 #include "prims/jvmtiExport.hpp"
64 #include "prims/jvmtiThreadState.hpp"
65 #include "prims/methodHandles.hpp"
66 #include "prims/nativeLookup.hpp"
67 #include "runtime/arguments.hpp"
68 #include "runtime/atomicAccess.hpp"
69 #include "runtime/basicLock.inline.hpp"
70 #include "runtime/frame.inline.hpp"
71 #include "runtime/handles.inline.hpp"
72 #include "runtime/init.hpp"
73 #include "runtime/interfaceSupport.inline.hpp"
74 #include "runtime/java.hpp"
75 #include "runtime/javaCalls.hpp"
76 #include "runtime/jniHandles.inline.hpp"
77 #include "runtime/osThread.hpp"
78 #include "runtime/perfData.hpp"
79 #include "runtime/sharedRuntime.hpp"
80 #include "runtime/signature.hpp"
81 #include "runtime/stackWatermarkSet.hpp"
82 #include "runtime/stubRoutines.hpp"
83 #include "runtime/synchronizer.hpp"
84 #include "runtime/timerTrace.hpp"
85 #include "runtime/vframe.inline.hpp"
86 #include "runtime/vframeArray.hpp"
87 #include "runtime/vm_version.hpp"
88 #include "utilities/copy.hpp"
89 #include "utilities/dtrace.hpp"
90 #include "utilities/events.hpp"
91 #include "utilities/exceptions.hpp"
92 #include "utilities/globalDefinitions.hpp"
93 #include "utilities/hashTable.hpp"
94 #include "utilities/macros.hpp"
95 #include "utilities/xmlstream.hpp"
96 #ifdef COMPILER1
97 #include "c1/c1_Runtime1.hpp"
98 #endif
99 #ifdef COMPILER2
100 #include "opto/runtime.hpp"
111 type* SharedRuntime::BLOB_FIELD_NAME(name);
112 SHARED_STUBS_DO(SHARED_STUB_FIELD_DEFINE)
113 #undef SHARED_STUB_FIELD_DEFINE
114
115 nmethod* SharedRuntime::_cont_doYield_stub;
116
117 #if 0
118 // TODO tweak global stub name generation to match this
119 #define SHARED_STUB_NAME_DECLARE(name, type) "Shared Runtime " # name "_blob",
120 const char *SharedRuntime::_stub_names[] = {
121 SHARED_STUBS_DO(SHARED_STUB_NAME_DECLARE)
122 };
123 #endif
124
125 //----------------------------generate_stubs-----------------------------------
126 void SharedRuntime::generate_initial_stubs() {
127 // Build this early so it's available for the interpreter.
128 _throw_StackOverflowError_blob =
129 generate_throw_exception(StubId::shared_throw_StackOverflowError_id,
130 CAST_FROM_FN_PTR(address, SharedRuntime::throw_StackOverflowError));
131
132 if (InlineTypeReturnedAsFields) {
133 _store_inline_type_fields_to_buf_blob =
134 generate_return_value_stub(CAST_FROM_FN_PTR(address, SharedRuntime::store_inline_type_fields_to_buf));
135 }
136 }
137
138 void SharedRuntime::generate_stubs() {
139 _wrong_method_blob =
140 generate_resolve_blob(StubId::shared_wrong_method_id,
141 CAST_FROM_FN_PTR(address, SharedRuntime::handle_wrong_method));
142 _wrong_method_abstract_blob =
143 generate_resolve_blob(StubId::shared_wrong_method_abstract_id,
144 CAST_FROM_FN_PTR(address, SharedRuntime::handle_wrong_method_abstract));
145 _ic_miss_blob =
146 generate_resolve_blob(StubId::shared_ic_miss_id,
147 CAST_FROM_FN_PTR(address, SharedRuntime::handle_wrong_method_ic_miss));
148 _resolve_opt_virtual_call_blob =
149 generate_resolve_blob(StubId::shared_resolve_opt_virtual_call_id,
150 CAST_FROM_FN_PTR(address, SharedRuntime::resolve_opt_virtual_call_C));
151 _resolve_virtual_call_blob =
152 generate_resolve_blob(StubId::shared_resolve_virtual_call_id,
153 CAST_FROM_FN_PTR(address, SharedRuntime::resolve_virtual_call_C));
154 _resolve_static_call_blob =
155 generate_resolve_blob(StubId::shared_resolve_static_call_id,
1178 // for a call current in progress, i.e., arguments has been pushed on stack
1179 // but callee has not been invoked yet. Caller frame must be compiled.
1180 Handle SharedRuntime::find_callee_info_helper(vframeStream& vfst, Bytecodes::Code& bc,
1181 CallInfo& callinfo, TRAPS) {
1182 Handle receiver;
1183 Handle nullHandle; // create a handy null handle for exception returns
1184 JavaThread* current = THREAD;
1185
1186 assert(!vfst.at_end(), "Java frame must exist");
1187
1188 // Find caller and bci from vframe
1189 methodHandle caller(current, vfst.method());
1190 int bci = vfst.bci();
1191
1192 if (caller->is_continuation_enter_intrinsic()) {
1193 bc = Bytecodes::_invokestatic;
1194 LinkResolver::resolve_continuation_enter(callinfo, CHECK_NH);
1195 return receiver;
1196 }
1197
1198 // Substitutability test implementation piggy backs on static call resolution
1199 Bytecodes::Code code = caller->java_code_at(bci);
1200 if (code == Bytecodes::_if_acmpeq || code == Bytecodes::_if_acmpne) {
1201 bc = Bytecodes::_invokestatic;
1202 methodHandle attached_method(THREAD, extract_attached_method(vfst));
1203 assert(attached_method.not_null(), "must have attached method");
1204 vmClasses::ValueObjectMethods_klass()->initialize(CHECK_NH);
1205 LinkResolver::resolve_invoke(callinfo, receiver, attached_method, bc, false, CHECK_NH);
1206 #ifdef ASSERT
1207 Symbol* subst_method_name = vmSymbols::isSubstitutable_name();
1208 Method* is_subst = vmClasses::ValueObjectMethods_klass()->find_method(subst_method_name, vmSymbols::object_object_boolean_signature());
1209 assert(callinfo.selected_method() == is_subst, "must be isSubstitutable method");
1210 #endif
1211 return receiver;
1212 }
1213
1214 Bytecode_invoke bytecode(caller, bci);
1215 int bytecode_index = bytecode.index();
1216 bc = bytecode.invoke_code();
1217
1218 methodHandle attached_method(current, extract_attached_method(vfst));
1219 if (attached_method.not_null()) {
1220 Method* callee = bytecode.static_target(CHECK_NH);
1221 vmIntrinsics::ID id = callee->intrinsic_id();
1222 // When VM replaces MH.invokeBasic/linkTo* call with a direct/virtual call,
1223 // it attaches statically resolved method to the call site.
1224 if (MethodHandles::is_signature_polymorphic(id) &&
1225 MethodHandles::is_signature_polymorphic_intrinsic(id)) {
1226 bc = MethodHandles::signature_polymorphic_intrinsic_bytecode(id);
1227
1228 // Adjust invocation mode according to the attached method.
1229 switch (bc) {
1230 case Bytecodes::_invokevirtual:
1231 if (attached_method->method_holder()->is_interface()) {
1232 bc = Bytecodes::_invokeinterface;
1233 }
1234 break;
1235 case Bytecodes::_invokeinterface:
1236 if (!attached_method->method_holder()->is_interface()) {
1237 bc = Bytecodes::_invokevirtual;
1238 }
1239 break;
1240 case Bytecodes::_invokehandle:
1241 if (!MethodHandles::is_signature_polymorphic_method(attached_method())) {
1242 bc = attached_method->is_static() ? Bytecodes::_invokestatic
1243 : Bytecodes::_invokevirtual;
1244 }
1245 break;
1246 default:
1247 break;
1248 }
1249 } else {
1250 assert(attached_method->has_scalarized_args(), "invalid use of attached method");
1251 if (!attached_method->method_holder()->is_inline_klass() || attached_method->is_static()) {
1252 // Ignore the attached method in this case to not confuse below code
1253 attached_method = methodHandle(current, nullptr);
1254 }
1255 }
1256 }
1257
1258 assert(bc != Bytecodes::_illegal, "not initialized");
1259
1260 bool has_receiver = bc != Bytecodes::_invokestatic &&
1261 bc != Bytecodes::_invokedynamic &&
1262 bc != Bytecodes::_invokehandle;
1263 bool check_null_and_abstract = true;
1264
1265 // Find receiver for non-static call
1266 if (has_receiver) {
1267 // This register map must be update since we need to find the receiver for
1268 // compiled frames. The receiver might be in a register.
1269 RegisterMap reg_map2(current,
1270 RegisterMap::UpdateMap::include,
1271 RegisterMap::ProcessFrames::include,
1272 RegisterMap::WalkContinuation::skip);
1273 frame stubFrame = current->last_frame();
1274 // Caller-frame is a compiled frame
1275 frame callerFrame = stubFrame.sender(®_map2);
1276
1277 Method* callee = attached_method();
1278 if (callee == nullptr) {
1279 callee = bytecode.static_target(CHECK_NH);
1280 if (callee == nullptr) {
1281 THROW_(vmSymbols::java_lang_NoSuchMethodException(), nullHandle);
1282 }
1283 }
1284 bool caller_is_c1 = callerFrame.is_compiled_frame() && callerFrame.cb()->as_nmethod()->is_compiled_by_c1();
1285 if (!caller_is_c1 && callee->is_scalarized_arg(0)) {
1286 // If the receiver is an inline type that is passed as fields, no oop is available
1287 // Resolve the call without receiver null checking.
1288 assert(!callee->mismatch(), "calls with inline type receivers should never mismatch");
1289 assert(attached_method.not_null() && !attached_method->is_abstract(), "must have non-abstract attached method");
1290 if (bc == Bytecodes::_invokeinterface) {
1291 bc = Bytecodes::_invokevirtual; // C2 optimistically replaces interface calls by virtual calls
1292 }
1293 check_null_and_abstract = false;
1294 } else {
1295 // Retrieve from a compiled argument list
1296 receiver = Handle(current, callerFrame.retrieve_receiver(®_map2));
1297 assert(oopDesc::is_oop_or_null(receiver()), "");
1298 if (receiver.is_null()) {
1299 THROW_(vmSymbols::java_lang_NullPointerException(), nullHandle);
1300 }
1301 }
1302 }
1303
1304 // Resolve method
1305 if (attached_method.not_null()) {
1306 // Parameterized by attached method.
1307 LinkResolver::resolve_invoke(callinfo, receiver, attached_method, bc, check_null_and_abstract, CHECK_NH);
1308 } else {
1309 // Parameterized by bytecode.
1310 constantPoolHandle constants(current, caller->constants());
1311 LinkResolver::resolve_invoke(callinfo, receiver, constants, bytecode_index, bc, CHECK_NH);
1312 }
1313
1314 #ifdef ASSERT
1315 // Check that the receiver klass is of the right subtype and that it is initialized for virtual calls
1316 if (has_receiver && check_null_and_abstract) {
1317 assert(receiver.not_null(), "should have thrown exception");
1318 Klass* receiver_klass = receiver->klass();
1319 Klass* rk = nullptr;
1320 if (attached_method.not_null()) {
1321 // In case there's resolved method attached, use its holder during the check.
1322 rk = attached_method->method_holder();
1323 } else {
1324 // Klass is already loaded.
1325 constantPoolHandle constants(current, caller->constants());
1326 rk = constants->klass_ref_at(bytecode_index, bc, CHECK_NH);
1327 }
1328 Klass* static_receiver_klass = rk;
1329 assert(receiver_klass->is_subtype_of(static_receiver_klass),
1330 "actual receiver must be subclass of static receiver klass");
1331 if (receiver_klass->is_instance_klass()) {
1332 if (InstanceKlass::cast(receiver_klass)->is_not_initialized()) {
1333 tty->print_cr("ERROR: Klass not yet initialized!!");
1334 receiver_klass->print();
1335 }
1336 assert(!InstanceKlass::cast(receiver_klass)->is_not_initialized(), "receiver_klass must be initialized");
1337 }
1338 }
1339 #endif
1340
1341 return receiver;
1342 }
1343
1344 methodHandle SharedRuntime::find_callee_method(bool& caller_does_not_scalarize, TRAPS) {
1345 JavaThread* current = THREAD;
1346 ResourceMark rm(current);
1347 // We need first to check if any Java activations (compiled, interpreted)
1348 // exist on the stack since last JavaCall. If not, we need
1349 // to get the target method from the JavaCall wrapper.
1350 vframeStream vfst(current, true); // Do not skip any javaCalls
1351 methodHandle callee_method;
1352 if (vfst.at_end()) {
1353 // No Java frames were found on stack since we did the JavaCall.
1354 // Hence the stack can only contain an entry_frame. We need to
1355 // find the target method from the stub frame.
1356 RegisterMap reg_map(current,
1357 RegisterMap::UpdateMap::skip,
1358 RegisterMap::ProcessFrames::include,
1359 RegisterMap::WalkContinuation::skip);
1360 frame fr = current->last_frame();
1361 assert(fr.is_runtime_frame(), "must be a runtimeStub");
1362 fr = fr.sender(®_map);
1363 assert(fr.is_entry_frame(), "must be");
1364 // fr is now pointing to the entry frame.
1365 callee_method = methodHandle(current, fr.entry_frame_call_wrapper()->callee_method());
1366 } else {
1367 Bytecodes::Code bc;
1368 CallInfo callinfo;
1369 find_callee_info_helper(vfst, bc, callinfo, CHECK_(methodHandle()));
1370 // Calls via mismatching methods are always non-scalarized
1371 if (callinfo.resolved_method()->mismatch()) {
1372 caller_does_not_scalarize = true;
1373 }
1374 callee_method = methodHandle(current, callinfo.selected_method());
1375 }
1376 assert(callee_method()->is_method(), "must be");
1377 return callee_method;
1378 }
1379
1380 // Resolves a call.
1381 methodHandle SharedRuntime::resolve_helper(bool is_virtual, bool is_optimized, bool& caller_does_not_scalarize, TRAPS) {
1382 JavaThread* current = THREAD;
1383 ResourceMark rm(current);
1384 RegisterMap cbl_map(current,
1385 RegisterMap::UpdateMap::skip,
1386 RegisterMap::ProcessFrames::include,
1387 RegisterMap::WalkContinuation::skip);
1388 frame caller_frame = current->last_frame().sender(&cbl_map);
1389
1390 CodeBlob* caller_cb = caller_frame.cb();
1391 guarantee(caller_cb != nullptr && caller_cb->is_nmethod(), "must be called from compiled method");
1392 nmethod* caller_nm = caller_cb->as_nmethod();
1393
1394 // determine call info & receiver
1395 // note: a) receiver is null for static calls
1396 // b) an exception is thrown if receiver is null for non-static calls
1397 CallInfo call_info;
1398 Bytecodes::Code invoke_code = Bytecodes::_illegal;
1399 Handle receiver = find_callee_info(invoke_code, call_info, CHECK_(methodHandle()));
1400
1401 NoSafepointVerifier nsv;
1402
1403 methodHandle callee_method(current, call_info.selected_method());
1404 // Calls via mismatching methods are always non-scalarized
1405 bool mismatch = is_optimized ? call_info.selected_method()->mismatch() : call_info.resolved_method()->mismatch();
1406 if (caller_nm->is_compiled_by_c1() || mismatch) {
1407 caller_does_not_scalarize = true;
1408 }
1409
1410 assert((!is_virtual && invoke_code == Bytecodes::_invokestatic ) ||
1411 (!is_virtual && invoke_code == Bytecodes::_invokespecial) ||
1412 (!is_virtual && invoke_code == Bytecodes::_invokehandle ) ||
1413 (!is_virtual && invoke_code == Bytecodes::_invokedynamic) ||
1414 ( is_virtual && invoke_code != Bytecodes::_invokestatic ), "inconsistent bytecode");
1415
1416 assert(!caller_nm->is_unloading(), "It should not be unloading");
1417
1418 #ifndef PRODUCT
1419 // tracing/debugging/statistics
1420 uint *addr = (is_optimized) ? (&_resolve_opt_virtual_ctr) :
1421 (is_virtual) ? (&_resolve_virtual_ctr) :
1422 (&_resolve_static_ctr);
1423 AtomicAccess::inc(addr);
1424
1425 if (TraceCallFixup) {
1426 ResourceMark rm(current);
1427 tty->print("resolving %s%s (%s) %s call to",
1428 (is_optimized) ? "optimized " : "", (is_virtual) ? "virtual" : "static",
1429 Bytecodes::name(invoke_code), (caller_does_not_scalarize) ? "non-scalar" : "");
1430 callee_method->print_short_name(tty);
1431 tty->print_cr(" at pc: " INTPTR_FORMAT " to code: " INTPTR_FORMAT,
1432 p2i(caller_frame.pc()), p2i(callee_method->code()));
1433 }
1434 #endif
1435
1436 if (invoke_code == Bytecodes::_invokestatic) {
1437 assert(callee_method->method_holder()->is_initialized() ||
1438 callee_method->method_holder()->is_reentrant_initialization(current),
1439 "invalid class initialization state for invoke_static");
1440 if (!VM_Version::supports_fast_class_init_checks() && callee_method->needs_clinit_barrier()) {
1441 // In order to keep class initialization check, do not patch call
1442 // site for static call when the class is not fully initialized.
1443 // Proper check is enforced by call site re-resolution on every invocation.
1444 //
1445 // When fast class initialization checks are supported (VM_Version::supports_fast_class_init_checks() == true),
1446 // explicit class initialization check is put in nmethod entry (VEP).
1447 assert(callee_method->method_holder()->is_linked(), "must be");
1448 return callee_method;
1449 }
1450 }
1451
1452
1453 // JSR 292 key invariant:
1454 // If the resolved method is a MethodHandle invoke target, the call
1455 // site must be a MethodHandle call site, because the lambda form might tail-call
1456 // leaving the stack in a state unknown to either caller or callee
1457
1458 // Compute entry points. The computation of the entry points is independent of
1459 // patching the call.
1460
1461 // Make sure the callee nmethod does not get deoptimized and removed before
1462 // we are done patching the code.
1463
1464
1465 CompiledICLocker ml(caller_nm);
1466 if (is_virtual && !is_optimized) {
1467 CompiledIC* inline_cache = CompiledIC_before(caller_nm, caller_frame.pc());
1468 inline_cache->update(&call_info, receiver->klass(), caller_does_not_scalarize);
1469 } else {
1470 // Callsite is a direct call - set it to the destination method
1471 CompiledDirectCall* callsite = CompiledDirectCall::before(caller_frame.pc());
1472 callsite->set(callee_method, caller_does_not_scalarize);
1473 }
1474
1475 return callee_method;
1476 }
1477
1478 // Inline caches exist only in compiled code
1479 JRT_BLOCK_ENTRY(address, SharedRuntime::handle_wrong_method_ic_miss(JavaThread* current))
1480 #ifdef ASSERT
1481 RegisterMap reg_map(current,
1482 RegisterMap::UpdateMap::skip,
1483 RegisterMap::ProcessFrames::include,
1484 RegisterMap::WalkContinuation::skip);
1485 frame stub_frame = current->last_frame();
1486 assert(stub_frame.is_runtime_frame(), "sanity check");
1487 frame caller_frame = stub_frame.sender(®_map);
1488 assert(!caller_frame.is_interpreted_frame() && !caller_frame.is_entry_frame() && !caller_frame.is_upcall_stub_frame(), "unexpected frame");
1489 #endif /* ASSERT */
1490
1491 methodHandle callee_method;
1492 bool caller_does_not_scalarize = false;
1493 JRT_BLOCK
1494 callee_method = SharedRuntime::handle_ic_miss_helper(caller_does_not_scalarize, CHECK_NULL);
1495 // Return Method* through TLS
1496 current->set_vm_result_metadata(callee_method());
1497 JRT_BLOCK_END
1498 // return compiled code entry point after potential safepoints
1499 return get_resolved_entry(current, callee_method, false, false, caller_does_not_scalarize);
1500 JRT_END
1501
1502
1503 // Handle call site that has been made non-entrant
1504 JRT_BLOCK_ENTRY(address, SharedRuntime::handle_wrong_method(JavaThread* current))
1505 // 6243940 We might end up in here if the callee is deoptimized
1506 // as we race to call it. We don't want to take a safepoint if
1507 // the caller was interpreted because the caller frame will look
1508 // interpreted to the stack walkers and arguments are now
1509 // "compiled" so it is much better to make this transition
1510 // invisible to the stack walking code. The i2c path will
1511 // place the callee method in the callee_target. It is stashed
1512 // there because if we try and find the callee by normal means a
1513 // safepoint is possible and have trouble gc'ing the compiled args.
1514 RegisterMap reg_map(current,
1515 RegisterMap::UpdateMap::skip,
1516 RegisterMap::ProcessFrames::include,
1517 RegisterMap::WalkContinuation::skip);
1518 frame stub_frame = current->last_frame();
1519 assert(stub_frame.is_runtime_frame(), "sanity check");
1520 frame caller_frame = stub_frame.sender(®_map);
1521
1522 if (caller_frame.is_interpreted_frame() ||
1523 caller_frame.is_entry_frame() ||
1524 caller_frame.is_upcall_stub_frame()) {
1525 Method* callee = current->callee_target();
1526 guarantee(callee != nullptr && callee->is_method(), "bad handshake");
1527 current->set_vm_result_metadata(callee);
1528 current->set_callee_target(nullptr);
1529 if (caller_frame.is_entry_frame() && VM_Version::supports_fast_class_init_checks()) {
1530 // Bypass class initialization checks in c2i when caller is in native.
1531 // JNI calls to static methods don't have class initialization checks.
1532 // Fast class initialization checks are present in c2i adapters and call into
1533 // SharedRuntime::handle_wrong_method() on the slow path.
1534 //
1535 // JVM upcalls may land here as well, but there's a proper check present in
1536 // LinkResolver::resolve_static_call (called from JavaCalls::call_static),
1537 // so bypassing it in c2i adapter is benign.
1538 return callee->get_c2i_no_clinit_check_entry();
1539 } else {
1540 if (caller_frame.is_interpreted_frame()) {
1541 return callee->get_c2i_inline_entry();
1542 } else {
1543 return callee->get_c2i_entry();
1544 }
1545 }
1546 }
1547
1548 // Must be compiled to compiled path which is safe to stackwalk
1549 methodHandle callee_method;
1550 bool is_static_call = false;
1551 bool is_optimized = false;
1552 bool caller_does_not_scalarize = false;
1553 JRT_BLOCK
1554 // Force resolving of caller (if we called from compiled frame)
1555 callee_method = SharedRuntime::reresolve_call_site(is_optimized, caller_does_not_scalarize, CHECK_NULL);
1556 current->set_vm_result_metadata(callee_method());
1557 JRT_BLOCK_END
1558 // return compiled code entry point after potential safepoints
1559 return get_resolved_entry(current, callee_method, callee_method->is_static(), is_optimized, caller_does_not_scalarize);
1560 JRT_END
1561
1562 // Handle abstract method call
1563 JRT_BLOCK_ENTRY(address, SharedRuntime::handle_wrong_method_abstract(JavaThread* current))
1564 // Verbose error message for AbstractMethodError.
1565 // Get the called method from the invoke bytecode.
1566 vframeStream vfst(current, true);
1567 assert(!vfst.at_end(), "Java frame must exist");
1568 methodHandle caller(current, vfst.method());
1569 Bytecode_invoke invoke(caller, vfst.bci());
1570 DEBUG_ONLY( invoke.verify(); )
1571
1572 // Find the compiled caller frame.
1573 RegisterMap reg_map(current,
1574 RegisterMap::UpdateMap::include,
1575 RegisterMap::ProcessFrames::include,
1576 RegisterMap::WalkContinuation::skip);
1577 frame stubFrame = current->last_frame();
1578 assert(stubFrame.is_runtime_frame(), "must be");
1579 frame callerFrame = stubFrame.sender(®_map);
1580 assert(callerFrame.is_compiled_frame(), "must be");
1581
1582 // Install exception and return forward entry.
1583 address res = SharedRuntime::throw_AbstractMethodError_entry();
1584 JRT_BLOCK
1585 methodHandle callee(current, invoke.static_target(current));
1586 if (!callee.is_null()) {
1587 oop recv = callerFrame.retrieve_receiver(®_map);
1588 Klass *recv_klass = (recv != nullptr) ? recv->klass() : nullptr;
1589 res = StubRoutines::forward_exception_entry();
1590 LinkResolver::throw_abstract_method_error(callee, recv_klass, CHECK_(res));
1591 }
1592 JRT_BLOCK_END
1593 return res;
1594 JRT_END
1595
1596 // return verified_code_entry if interp_only_mode is not set for the current thread;
1597 // otherwise return c2i entry.
1598 address SharedRuntime::get_resolved_entry(JavaThread* current, methodHandle callee_method,
1599 bool is_static_call, bool is_optimized, bool caller_does_not_scalarize) {
1600 bool is_interp_only_mode = (StressCallingConvention && (os::random() % (1 << 10)) == 0) || current->is_interp_only_mode();
1601 // In interp_only_mode we need to go to the interpreted entry
1602 // The c2i won't patch in this mode -- see fixup_callers_callsite
1603 bool go_to_interpreter = is_interp_only_mode && !callee_method->is_special_native_intrinsic();
1604
1605 if (caller_does_not_scalarize) {
1606 if (go_to_interpreter) {
1607 return callee_method->get_c2i_inline_entry();
1608 }
1609 assert(callee_method->verified_inline_code_entry() != nullptr, "Jump to zero!");
1610 return callee_method->verified_inline_code_entry();
1611 } else if (is_static_call || is_optimized) {
1612 if (go_to_interpreter) {
1613 return callee_method->get_c2i_entry();
1614 }
1615 assert(callee_method->verified_code_entry() != nullptr, "Jump to zero!");
1616 return callee_method->verified_code_entry();
1617 } else {
1618 if (go_to_interpreter) {
1619 return callee_method->get_c2i_inline_ro_entry();
1620 }
1621 assert(callee_method->verified_inline_ro_code_entry() != nullptr, "Jump to zero!");
1622 return callee_method->verified_inline_ro_code_entry();
1623 }
1624 }
1625
1626 // resolve a static call and patch code
1627 JRT_BLOCK_ENTRY(address, SharedRuntime::resolve_static_call_C(JavaThread* current ))
1628 methodHandle callee_method;
1629 bool caller_does_not_scalarize = false;
1630 bool enter_special = false;
1631 JRT_BLOCK
1632 callee_method = SharedRuntime::resolve_helper(false, false, caller_does_not_scalarize, CHECK_NULL);
1633 current->set_vm_result_metadata(callee_method());
1634 JRT_BLOCK_END
1635 // return compiled code entry point after potential safepoints
1636 return get_resolved_entry(current, callee_method, true, false, caller_does_not_scalarize);
1637 JRT_END
1638
1639 // resolve virtual call and update inline cache to monomorphic
1640 JRT_BLOCK_ENTRY(address, SharedRuntime::resolve_virtual_call_C(JavaThread* current))
1641 methodHandle callee_method;
1642 bool caller_does_not_scalarize = false;
1643 JRT_BLOCK
1644 callee_method = SharedRuntime::resolve_helper(true, false, caller_does_not_scalarize, CHECK_NULL);
1645 current->set_vm_result_metadata(callee_method());
1646 JRT_BLOCK_END
1647 // return compiled code entry point after potential safepoints
1648 return get_resolved_entry(current, callee_method, false, false, caller_does_not_scalarize);
1649 JRT_END
1650
1651
1652 // Resolve a virtual call that can be statically bound (e.g., always
1653 // monomorphic, so it has no inline cache). Patch code to resolved target.
1654 JRT_BLOCK_ENTRY(address, SharedRuntime::resolve_opt_virtual_call_C(JavaThread* current))
1655 methodHandle callee_method;
1656 bool caller_does_not_scalarize = false;
1657 JRT_BLOCK
1658 callee_method = SharedRuntime::resolve_helper(true, true, caller_does_not_scalarize, CHECK_NULL);
1659 current->set_vm_result_metadata(callee_method());
1660 JRT_BLOCK_END
1661 // return compiled code entry point after potential safepoints
1662 return get_resolved_entry(current, callee_method, false, true, caller_does_not_scalarize);
1663 JRT_END
1664
1665 methodHandle SharedRuntime::handle_ic_miss_helper(bool& caller_does_not_scalarize, TRAPS) {
1666 JavaThread* current = THREAD;
1667 ResourceMark rm(current);
1668 CallInfo call_info;
1669 Bytecodes::Code bc;
1670
1671 // receiver is null for static calls. An exception is thrown for null
1672 // receivers for non-static calls
1673 Handle receiver = find_callee_info(bc, call_info, CHECK_(methodHandle()));
1674
1675 methodHandle callee_method(current, call_info.selected_method());
1676
1677 #ifndef PRODUCT
1678 AtomicAccess::inc(&_ic_miss_ctr);
1679
1680 // Statistics & Tracing
1681 if (TraceCallFixup) {
1682 ResourceMark rm(current);
1683 tty->print("IC miss (%s) %s call to", Bytecodes::name(bc), (caller_does_not_scalarize) ? "non-scalar" : "");
1684 callee_method->print_short_name(tty);
1685 tty->print_cr(" code: " INTPTR_FORMAT, p2i(callee_method->code()));
1686 }
1687
1688 if (ICMissHistogram) {
1689 MutexLocker m(VMStatistic_lock);
1690 RegisterMap reg_map(current,
1691 RegisterMap::UpdateMap::skip,
1692 RegisterMap::ProcessFrames::include,
1693 RegisterMap::WalkContinuation::skip);
1694 frame f = current->last_frame().real_sender(®_map);// skip runtime stub
1695 // produce statistics under the lock
1696 trace_ic_miss(f.pc());
1697 }
1698 #endif
1699
1700 // install an event collector so that when a vtable stub is created the
1701 // profiler can be notified via a DYNAMIC_CODE_GENERATED event. The
1702 // event can't be posted when the stub is created as locks are held
1703 // - instead the event will be deferred until the event collector goes
1704 // out of scope.
1705 JvmtiDynamicCodeEventCollector event_collector;
1706
1707 // Update inline cache to megamorphic. Skip update if we are called from interpreted.
1708 RegisterMap reg_map(current,
1709 RegisterMap::UpdateMap::skip,
1710 RegisterMap::ProcessFrames::include,
1711 RegisterMap::WalkContinuation::skip);
1712 frame caller_frame = current->last_frame().sender(®_map);
1713 CodeBlob* cb = caller_frame.cb();
1714 nmethod* caller_nm = cb->as_nmethod();
1715 // Calls via mismatching methods are always non-scalarized
1716 if (caller_nm->is_compiled_by_c1() || call_info.resolved_method()->mismatch()) {
1717 caller_does_not_scalarize = true;
1718 }
1719
1720 CompiledICLocker ml(caller_nm);
1721 CompiledIC* inline_cache = CompiledIC_before(caller_nm, caller_frame.pc());
1722 inline_cache->update(&call_info, receiver()->klass(), caller_does_not_scalarize);
1723
1724 return callee_method;
1725 }
1726
1727 //
1728 // Resets a call-site in compiled code so it will get resolved again.
1729 // This routines handles both virtual call sites, optimized virtual call
1730 // sites, and static call sites. Typically used to change a call sites
1731 // destination from compiled to interpreted.
1732 //
1733 methodHandle SharedRuntime::reresolve_call_site(bool& is_optimized, bool& caller_does_not_scalarize, TRAPS) {
1734 JavaThread* current = THREAD;
1735 ResourceMark rm(current);
1736 RegisterMap reg_map(current,
1737 RegisterMap::UpdateMap::skip,
1738 RegisterMap::ProcessFrames::include,
1739 RegisterMap::WalkContinuation::skip);
1740 frame stub_frame = current->last_frame();
1741 assert(stub_frame.is_runtime_frame(), "must be a runtimeStub");
1742 frame caller = stub_frame.sender(®_map);
1743 if (caller.is_compiled_frame()) {
1744 caller_does_not_scalarize = caller.cb()->as_nmethod()->is_compiled_by_c1();
1745 }
1746 assert(!caller.is_interpreted_frame(), "must be compiled");
1747
1748 // If the frame isn't a live compiled frame (i.e. deoptimized by the time we get here), no IC clearing must be done
1749 // for the caller. However, when the caller is C2 compiled and the callee a C1 or C2 compiled method, then we still
1750 // need to figure out whether it was an optimized virtual call with an inline type receiver. Otherwise, we end up
1751 // using the wrong method entry point and accidentally skip the buffering of the receiver.
1752 methodHandle callee_method = find_callee_method(caller_does_not_scalarize, CHECK_(methodHandle()));
1753 const bool caller_is_compiled_and_not_deoptimized = caller.is_compiled_frame() && !caller.is_deoptimized_frame();
1754 const bool caller_is_continuation_enter_intrinsic =
1755 caller.is_native_frame() && caller.cb()->as_nmethod()->method()->is_continuation_enter_intrinsic();
1756 const bool do_IC_clearing = caller_is_compiled_and_not_deoptimized || caller_is_continuation_enter_intrinsic;
1757
1758 const bool callee_compiled_with_scalarized_receiver = callee_method->has_compiled_code() &&
1759 !callee_method()->is_static() &&
1760 callee_method()->is_scalarized_arg(0);
1761 const bool compute_is_optimized = !caller_does_not_scalarize && callee_compiled_with_scalarized_receiver;
1762
1763 if (do_IC_clearing || compute_is_optimized) {
1764 address pc = caller.pc();
1765
1766 nmethod* caller_nm = CodeCache::find_nmethod(pc);
1767 assert(caller_nm != nullptr, "did not find caller nmethod");
1768
1769 // Default call_addr is the location of the "basic" call.
1770 // Determine the address of the call we a reresolving. With
1771 // Inline Caches we will always find a recognizable call.
1772 // With Inline Caches disabled we may or may not find a
1773 // recognizable call. We will always find a call for static
1774 // calls and for optimized virtual calls. For vanilla virtual
1775 // calls it depends on the state of the UseInlineCaches switch.
1776 //
1777 // With Inline Caches disabled we can get here for a virtual call
1778 // for two reasons:
1779 // 1 - calling an abstract method. The vtable for abstract methods
1780 // will run us thru handle_wrong_method and we will eventually
1781 // end up in the interpreter to throw the ame.
1782 // 2 - a racing deoptimization. We could be doing a vanilla vtable
1783 // call and between the time we fetch the entry address and
1784 // we jump to it the target gets deoptimized. Similar to 1
1785 // we will wind up in the interprter (thru a c2i with c2).
1786 //
1787 CompiledICLocker ml(caller_nm);
1788 address call_addr = caller_nm->call_instruction_address(pc);
1789
1790 if (call_addr != nullptr) {
1791 // On x86 the logic for finding a call instruction is blindly checking for a call opcode 5
1792 // bytes back in the instruction stream so we must also check for reloc info.
1793 RelocIterator iter(caller_nm, call_addr, call_addr+1);
1794 bool ret = iter.next(); // Get item
1795 if (ret) {
1796 is_optimized = false;
1797 switch (iter.type()) {
1798 case relocInfo::static_call_type:
1799 assert(callee_method->is_static(), "must be");
1800 case relocInfo::opt_virtual_call_type: {
1801 is_optimized = (iter.type() == relocInfo::opt_virtual_call_type);
1802 if (do_IC_clearing) {
1803 CompiledDirectCall* cdc = CompiledDirectCall::at(call_addr);
1804 cdc->set_to_clean();
1805 }
1806 break;
1807 }
1808
1809 case relocInfo::virtual_call_type: {
1810 if (do_IC_clearing) {
1811 // compiled, dispatched call (which used to call an interpreted method)
1812 CompiledIC* inline_cache = CompiledIC_at(caller_nm, call_addr);
1813 inline_cache->set_to_clean();
1814 }
1815 break;
1816 }
1817 default:
1818 break;
1819 }
1820 }
1821 }
1822 }
1823
1824 #ifndef PRODUCT
1825 AtomicAccess::inc(&_wrong_method_ctr);
1826
1827 if (TraceCallFixup) {
1828 ResourceMark rm(current);
1829 tty->print("handle_wrong_method reresolving %s call to", (caller_does_not_scalarize) ? "non-scalar" : "");
1830 callee_method->print_short_name(tty);
1831 tty->print_cr(" code: " INTPTR_FORMAT, p2i(callee_method->code()));
1832 }
1833 #endif
1834
1835 return callee_method;
1836 }
1837
1838 address SharedRuntime::handle_unsafe_access(JavaThread* thread, address next_pc) {
1839 // The faulting unsafe accesses should be changed to throw the error
1840 // synchronously instead. Meanwhile the faulting instruction will be
1841 // skipped over (effectively turning it into a no-op) and an
1842 // asynchronous exception will be raised which the thread will
1843 // handle at a later point. If the instruction is a load it will
1844 // return garbage.
1845
1846 // Request an async exception.
1847 thread->set_pending_unsafe_access_error();
1848
1849 // Return address of next instruction to execute.
2015 msglen += strlen(caster_klass_description) + strlen(target_klass_description) + strlen(klass_separator) + 3;
2016
2017 char* message = NEW_RESOURCE_ARRAY_RETURN_NULL(char, msglen);
2018 if (message == nullptr) {
2019 // Shouldn't happen, but don't cause even more problems if it does
2020 message = const_cast<char*>(caster_klass->external_name());
2021 } else {
2022 jio_snprintf(message,
2023 msglen,
2024 "class %s cannot be cast to class %s (%s%s%s)",
2025 caster_name,
2026 target_name,
2027 caster_klass_description,
2028 klass_separator,
2029 target_klass_description
2030 );
2031 }
2032 return message;
2033 }
2034
2035 char* SharedRuntime::generate_identity_exception_message(JavaThread* current, Klass* klass) {
2036 assert(klass->is_inline_klass(), "Must be a concrete value class");
2037 const char* desc = "Cannot synchronize on an instance of value class ";
2038 const char* className = klass->external_name();
2039 size_t msglen = strlen(desc) + strlen(className) + 1;
2040 char* message = NEW_RESOURCE_ARRAY(char, msglen);
2041 if (nullptr == message) {
2042 // Out of memory: can't create detailed error message
2043 message = const_cast<char*>(klass->external_name());
2044 } else {
2045 jio_snprintf(message, msglen, "%s%s", desc, className);
2046 }
2047 return message;
2048 }
2049
2050 JRT_LEAF(void, SharedRuntime::reguard_yellow_pages())
2051 (void) JavaThread::current()->stack_overflow_state()->reguard_stack();
2052 JRT_END
2053
2054 void SharedRuntime::monitor_enter_helper(oopDesc* obj, BasicLock* lock, JavaThread* current) {
2055 if (!SafepointSynchronize::is_synchronizing()) {
2056 // Only try quick_enter() if we're not trying to reach a safepoint
2057 // so that the calling thread reaches the safepoint more quickly.
2058 if (ObjectSynchronizer::quick_enter(obj, lock, current)) {
2059 return;
2060 }
2061 }
2062 // NO_ASYNC required because an async exception on the state transition destructor
2063 // would leave you with the lock held and it would never be released.
2064 // The normal monitorenter NullPointerException is thrown without acquiring a lock
2065 // and the model is that an exception implies the method failed.
2066 JRT_BLOCK_NO_ASYNC
2067 Handle h_obj(THREAD, obj);
2068 ObjectSynchronizer::enter(h_obj, lock, current);
2069 assert(!HAS_PENDING_EXCEPTION, "Should have no exception here");
2263 tty->print_cr("Note 1: counter updates are not MT-safe.");
2264 tty->print_cr("Note 2: %% in major categories are relative to total non-inlined calls;");
2265 tty->print_cr(" %% in nested categories are relative to their category");
2266 tty->print_cr(" (and thus add up to more than 100%% with inlining)");
2267 tty->cr();
2268
2269 MethodArityHistogram h;
2270 }
2271 #endif
2272
2273 #ifndef PRODUCT
2274 static int _lookups; // number of calls to lookup
2275 static int _equals; // number of buckets checked with matching hash
2276 static int _archived_hits; // number of successful lookups in archived table
2277 static int _runtime_hits; // number of successful lookups in runtime table
2278 #endif
2279
2280 // A simple wrapper class around the calling convention information
2281 // that allows sharing of adapters for the same calling convention.
2282 class AdapterFingerPrint : public MetaspaceObj {
2283 public:
2284 class Element {
2285 private:
2286 // The highest byte is the type of the argument. The remaining bytes contain the offset of the
2287 // field if it is flattened in the calling convention, -1 otherwise.
2288 juint _payload;
2289
2290 static constexpr int offset_bit_width = 24;
2291 static constexpr juint offset_bit_mask = (1 << offset_bit_width) - 1;
2292 public:
2293 Element(BasicType bt, int offset) : _payload((static_cast<juint>(bt) << offset_bit_width) | (juint(offset) & offset_bit_mask)) {
2294 assert(offset >= -1 && offset < jint(offset_bit_mask), "invalid offset %d", offset);
2295 }
2296
2297 BasicType bt() const {
2298 return static_cast<BasicType>(_payload >> offset_bit_width);
2299 }
2300
2301 int offset() const {
2302 juint res = _payload & offset_bit_mask;
2303 return res == offset_bit_mask ? -1 : res;
2304 }
2305
2306 juint hash() const {
2307 return _payload;
2308 }
2309
2310 bool operator!=(const Element& other) const {
2311 return _payload != other._payload;
2312 }
2313 };
2314
2315 private:
2316 const bool _has_ro_adapter;
2317 const int _length;
2318
2319 static int data_offset() { return sizeof(AdapterFingerPrint); }
2320 Element* data_pointer() {
2321 return reinterpret_cast<Element*>(reinterpret_cast<address>(this) + data_offset());
2322 }
2323
2324 const Element& element_at(int index) {
2325 assert(index < length(), "index %d out of bounds for length %d", index, length());
2326 Element* data = data_pointer();
2327 return data[index];
2328 }
2329
2330 // Private construtor. Use allocate() to get an instance.
2331 AdapterFingerPrint(const GrowableArray<SigEntry>* sig, bool has_ro_adapter)
2332 : _has_ro_adapter(has_ro_adapter), _length(total_args_passed_in_sig(sig)) {
2333 Element* data = data_pointer();
2334 BasicType prev_bt = T_ILLEGAL;
2335 int vt_count = 0;
2336 for (int index = 0; index < _length; index++) {
2337 const SigEntry& sig_entry = sig->at(index);
2338 BasicType bt = sig_entry._bt;
2339 if (bt == T_METADATA) {
2340 // Found start of inline type in signature
2341 assert(InlineTypePassFieldsAsArgs, "unexpected start of inline type");
2342 vt_count++;
2343 } else if (bt == T_VOID && prev_bt != T_LONG && prev_bt != T_DOUBLE) {
2344 // Found end of inline type in signature
2345 assert(InlineTypePassFieldsAsArgs, "unexpected end of inline type");
2346 vt_count--;
2347 assert(vt_count >= 0, "invalid vt_count");
2348 } else if (vt_count == 0) {
2349 // Widen fields that are not part of a scalarized inline type argument
2350 assert(sig_entry._offset == -1, "invalid offset for argument that is not a flattened field %d", sig_entry._offset);
2351 bt = adapter_encoding(bt);
2352 }
2353
2354 ::new(&data[index]) Element(bt, sig_entry._offset);
2355 prev_bt = bt;
2356 }
2357 assert(vt_count == 0, "invalid vt_count");
2358 }
2359
2360 // Call deallocate instead
2361 ~AdapterFingerPrint() {
2362 ShouldNotCallThis();
2363 }
2364
2365 static int total_args_passed_in_sig(const GrowableArray<SigEntry>* sig) {
2366 return (sig != nullptr) ? sig->length() : 0;
2367 }
2368
2369 static int compute_size_in_words(int len) {
2370 return (int)heap_word_size(sizeof(AdapterFingerPrint) + (len * sizeof(Element)));
2371 }
2372
2373 // Remap BasicTypes that are handled equivalently by the adapters.
2374 // These are correct for the current system but someday it might be
2375 // necessary to make this mapping platform dependent.
2376 static BasicType adapter_encoding(BasicType in) {
2377 switch (in) {
2378 case T_BOOLEAN:
2379 case T_BYTE:
2380 case T_SHORT:
2381 case T_CHAR:
2382 // They are all promoted to T_INT in the calling convention
2383 return T_INT;
2384
2385 case T_OBJECT:
2386 case T_ARRAY:
2387 // In other words, we assume that any register good enough for
2388 // an int or long is good enough for a managed pointer.
2389 #ifdef _LP64
2390 return T_LONG;
2391 #else
2392 return T_INT;
2393 #endif
2394
2395 case T_INT:
2396 case T_LONG:
2397 case T_FLOAT:
2398 case T_DOUBLE:
2399 case T_VOID:
2400 return in;
2401
2402 default:
2403 ShouldNotReachHere();
2404 return T_CONFLICT;
2405 }
2406 }
2407
2408 void* operator new(size_t size, size_t fp_size) throw() {
2409 assert(fp_size >= size, "sanity check");
2410 void* p = AllocateHeap(fp_size, mtCode);
2411 memset(p, 0, fp_size);
2412 return p;
2413 }
2414
2415 public:
2416 template<typename Function>
2417 void iterate_args(Function function) {
2418 for (int i = 0; i < length(); i++) {
2419 function(element_at(i));
2420 }
2421 }
2422
2423 static AdapterFingerPrint* allocate(const GrowableArray<SigEntry>* sig, bool has_ro_adapter = false) {
2424 int len = total_args_passed_in_sig(sig);
2425 int size_in_bytes = BytesPerWord * compute_size_in_words(len);
2426 AdapterFingerPrint* afp = new (size_in_bytes) AdapterFingerPrint(sig, has_ro_adapter);
2427 assert((afp->size() * BytesPerWord) == size_in_bytes, "should match");
2428 return afp;
2429 }
2430
2431 static void deallocate(AdapterFingerPrint* fp) {
2432 FreeHeap(fp);
2433 }
2434
2435 bool has_ro_adapter() const {
2436 return _has_ro_adapter;
2437 }
2438
2439 int length() const {
2440 return _length;
2441 }
2442
2443 unsigned int compute_hash() {
2444 int hash = 0;
2445 for (int i = 0; i < length(); i++) {
2446 const Element& v = element_at(i);
2447 //Add arithmetic operation to the hash, like +3 to improve hashing
2448 hash = ((hash << 8) ^ v.hash() ^ (hash >> 5)) + 3;
2449 }
2450 return (unsigned int)hash;
2451 }
2452
2453 const char* as_string() {
2454 stringStream st;
2455 st.print("{");
2456 if (_has_ro_adapter) {
2457 st.print("has_ro_adapter");
2458 } else {
2459 st.print("no_ro_adapter");
2460 }
2461 for (int i = 0; i < length(); i++) {
2462 st.print(", ");
2463 const Element& elem = element_at(i);
2464 st.print("{%s, %d}", type2name(elem.bt()), elem.offset());
2465 }
2466 st.print("}");
2467 return st.as_string();
2468 }
2469
2470 const char* as_basic_args_string() {
2471 stringStream st;
2472 bool long_prev = false;
2473 iterate_args([&] (const Element& arg) {
2474 if (long_prev) {
2475 long_prev = false;
2476 if (arg.bt() == T_VOID) {
2477 st.print("J");
2478 } else {
2479 st.print("L");
2480 }
2481 }
2482 if (arg.bt() == T_LONG) {
2483 long_prev = true;
2484 } else if (arg.bt() != T_VOID) {
2485 st.print("%c", type2char(arg.bt()));
2486 }
2487 });
2488 if (long_prev) {
2489 st.print("L");
2490 }
2491 return st.as_string();
2492 }
2493
2494 bool equals(AdapterFingerPrint* other) {
2495 if (other->_has_ro_adapter != _has_ro_adapter) {
2496 return false;
2497 } else if (other->_length != _length) {
2498 return false;
2499 } else {
2500 for (int i = 0; i < _length; i++) {
2501 if (element_at(i) != other->element_at(i)) {
2502 return false;
2503 }
2504 }
2505 }
2506 return true;
2507 }
2508
2509 // methods required by virtue of being a MetaspaceObj
2510 void metaspace_pointers_do(MetaspaceClosure* it) { return; /* nothing to do here */ }
2511 int size() const { return compute_size_in_words(_length); }
2512 MetaspaceObj::Type type() const { return AdapterFingerPrintType; }
2513
2514 static bool equals(AdapterFingerPrint* const& fp1, AdapterFingerPrint* const& fp2) {
2515 NOT_PRODUCT(_equals++);
2516 return fp1->equals(fp2);
2517 }
2518
2519 static unsigned int compute_hash(AdapterFingerPrint* const& fp) {
2520 return fp->compute_hash();
2521 }
2524 #if INCLUDE_CDS
2525 static inline bool adapter_fp_equals_compact_hashtable_entry(AdapterHandlerEntry* entry, AdapterFingerPrint* fp, int len_unused) {
2526 return AdapterFingerPrint::equals(entry->fingerprint(), fp);
2527 }
2528
2529 class ArchivedAdapterTable : public OffsetCompactHashtable<
2530 AdapterFingerPrint*,
2531 AdapterHandlerEntry*,
2532 adapter_fp_equals_compact_hashtable_entry> {};
2533 #endif // INCLUDE_CDS
2534
2535 // A hashtable mapping from AdapterFingerPrints to AdapterHandlerEntries
2536 using AdapterHandlerTable = HashTable<AdapterFingerPrint*, AdapterHandlerEntry*, 293,
2537 AnyObj::C_HEAP, mtCode,
2538 AdapterFingerPrint::compute_hash,
2539 AdapterFingerPrint::equals>;
2540 static AdapterHandlerTable* _adapter_handler_table;
2541 static GrowableArray<AdapterHandlerEntry*>* _adapter_handler_list = nullptr;
2542
2543 // Find a entry with the same fingerprint if it exists
2544 AdapterHandlerEntry* AdapterHandlerLibrary::lookup(const GrowableArray<SigEntry>* sig, bool has_ro_adapter) {
2545 NOT_PRODUCT(_lookups++);
2546 assert_lock_strong(AdapterHandlerLibrary_lock);
2547 AdapterFingerPrint* fp = AdapterFingerPrint::allocate(sig, has_ro_adapter);
2548 AdapterHandlerEntry* entry = nullptr;
2549 #if INCLUDE_CDS
2550 // if we are building the archive then the archived adapter table is
2551 // not valid and we need to use the ones added to the runtime table
2552 if (AOTCodeCache::is_using_adapter()) {
2553 // Search archived table first. It is read-only table so can be searched without lock
2554 entry = _aot_adapter_handler_table.lookup(fp, fp->compute_hash(), 0 /* unused */);
2555 #ifndef PRODUCT
2556 if (entry != nullptr) {
2557 _archived_hits++;
2558 }
2559 #endif
2560 }
2561 #endif // INCLUDE_CDS
2562 if (entry == nullptr) {
2563 assert_lock_strong(AdapterHandlerLibrary_lock);
2564 AdapterHandlerEntry** entry_p = _adapter_handler_table->get(fp);
2565 if (entry_p != nullptr) {
2566 entry = *entry_p;
2567 assert(entry->fingerprint()->equals(fp), "fingerprint mismatch key fp %s %s (hash=%d) != found fp %s %s (hash=%d)",
2584 TableStatistics ts = _adapter_handler_table->statistics_calculate(size);
2585 ts.print(tty, "AdapterHandlerTable");
2586 tty->print_cr("AdapterHandlerTable (table_size=%d, entries=%d)",
2587 _adapter_handler_table->table_size(), _adapter_handler_table->number_of_entries());
2588 int total_hits = _archived_hits + _runtime_hits;
2589 tty->print_cr("AdapterHandlerTable: lookups %d equals %d hits %d (archived=%d+runtime=%d)",
2590 _lookups, _equals, total_hits, _archived_hits, _runtime_hits);
2591 }
2592 #endif
2593
2594 // ---------------------------------------------------------------------------
2595 // Implementation of AdapterHandlerLibrary
2596 AdapterHandlerEntry* AdapterHandlerLibrary::_no_arg_handler = nullptr;
2597 AdapterHandlerEntry* AdapterHandlerLibrary::_int_arg_handler = nullptr;
2598 AdapterHandlerEntry* AdapterHandlerLibrary::_obj_arg_handler = nullptr;
2599 AdapterHandlerEntry* AdapterHandlerLibrary::_obj_int_arg_handler = nullptr;
2600 AdapterHandlerEntry* AdapterHandlerLibrary::_obj_obj_arg_handler = nullptr;
2601 #if INCLUDE_CDS
2602 ArchivedAdapterTable AdapterHandlerLibrary::_aot_adapter_handler_table;
2603 #endif // INCLUDE_CDS
2604 static const int AdapterHandlerLibrary_size = 48*K;
2605 BufferBlob* AdapterHandlerLibrary::_buffer = nullptr;
2606 volatile uint AdapterHandlerLibrary::_id_counter = 0;
2607
2608 BufferBlob* AdapterHandlerLibrary::buffer_blob() {
2609 assert(_buffer != nullptr, "should be initialized");
2610 return _buffer;
2611 }
2612
2613 static void post_adapter_creation(const AdapterHandlerEntry* entry) {
2614 if (Forte::is_enabled() || JvmtiExport::should_post_dynamic_code_generated()) {
2615 AdapterBlob* adapter_blob = entry->adapter_blob();
2616 char blob_id[256];
2617 jio_snprintf(blob_id,
2618 sizeof(blob_id),
2619 "%s(%s)",
2620 adapter_blob->name(),
2621 entry->fingerprint()->as_string());
2622 if (Forte::is_enabled()) {
2623 Forte::register_stub(blob_id, adapter_blob->content_begin(), adapter_blob->content_end());
2624 }
2632 void AdapterHandlerLibrary::initialize() {
2633 {
2634 ResourceMark rm;
2635 _adapter_handler_table = new (mtCode) AdapterHandlerTable();
2636 _buffer = BufferBlob::create("adapters", AdapterHandlerLibrary_size);
2637 }
2638
2639 #if INCLUDE_CDS
2640 // Link adapters in AOT Cache to their code in AOT Code Cache
2641 if (AOTCodeCache::is_using_adapter() && !_aot_adapter_handler_table.empty()) {
2642 link_aot_adapters();
2643 lookup_simple_adapters();
2644 return;
2645 }
2646 #endif // INCLUDE_CDS
2647
2648 ResourceMark rm;
2649 {
2650 MutexLocker mu(AdapterHandlerLibrary_lock);
2651
2652 CompiledEntrySignature no_args;
2653 no_args.compute_calling_conventions();
2654 _no_arg_handler = create_adapter(no_args, true);
2655
2656 CompiledEntrySignature obj_args;
2657 SigEntry::add_entry(obj_args.sig(), T_OBJECT);
2658 obj_args.compute_calling_conventions();
2659 _obj_arg_handler = create_adapter(obj_args, true);
2660
2661 CompiledEntrySignature int_args;
2662 SigEntry::add_entry(int_args.sig(), T_INT);
2663 int_args.compute_calling_conventions();
2664 _int_arg_handler = create_adapter(int_args, true);
2665
2666 CompiledEntrySignature obj_int_args;
2667 SigEntry::add_entry(obj_int_args.sig(), T_OBJECT);
2668 SigEntry::add_entry(obj_int_args.sig(), T_INT);
2669 obj_int_args.compute_calling_conventions();
2670 _obj_int_arg_handler = create_adapter(obj_int_args, true);
2671
2672 CompiledEntrySignature obj_obj_args;
2673 SigEntry::add_entry(obj_obj_args.sig(), T_OBJECT);
2674 SigEntry::add_entry(obj_obj_args.sig(), T_OBJECT);
2675 obj_obj_args.compute_calling_conventions();
2676 _obj_obj_arg_handler = create_adapter(obj_obj_args, true);
2677
2678 // we should always get an entry back but we don't have any
2679 // associated blob on Zero
2680 assert(_no_arg_handler != nullptr &&
2681 _obj_arg_handler != nullptr &&
2682 _int_arg_handler != nullptr &&
2683 _obj_int_arg_handler != nullptr &&
2684 _obj_obj_arg_handler != nullptr, "Initial adapter handlers must be properly created");
2685 }
2686
2687 // Outside of the lock
2688 #ifndef ZERO
2689 // no blobs to register when we are on Zero
2690 post_adapter_creation(_no_arg_handler);
2691 post_adapter_creation(_obj_arg_handler);
2692 post_adapter_creation(_int_arg_handler);
2693 post_adapter_creation(_obj_int_arg_handler);
2694 post_adapter_creation(_obj_obj_arg_handler);
2695 #endif // ZERO
2696 }
2697
2698 AdapterHandlerEntry* AdapterHandlerLibrary::new_entry(AdapterFingerPrint* fingerprint) {
2699 uint id = (uint)AtomicAccess::add((int*)&_id_counter, 1);
2700 assert(id > 0, "we can never overflow because AOT cache cannot contain more than 2^32 methods");
2701 return AdapterHandlerEntry::allocate(id, fingerprint);
2702 }
2703
2704 AdapterHandlerEntry* AdapterHandlerLibrary::get_simple_adapter(const methodHandle& method) {
2705 int total_args_passed = method->size_of_parameters(); // All args on stack
2706 if (total_args_passed == 0) {
2707 return _no_arg_handler;
2708 } else if (total_args_passed == 1) {
2709 if (!method->is_static()) {
2710 if (InlineTypePassFieldsAsArgs && method->method_holder()->is_inline_klass()) {
2711 return nullptr;
2712 }
2713 return _obj_arg_handler;
2714 }
2715 switch (method->signature()->char_at(1)) {
2716 case JVM_SIGNATURE_CLASS: {
2717 if (InlineTypePassFieldsAsArgs) {
2718 SignatureStream ss(method->signature());
2719 InlineKlass* vk = ss.as_inline_klass(method->method_holder());
2720 if (vk != nullptr) {
2721 return nullptr;
2722 }
2723 }
2724 return _obj_arg_handler;
2725 }
2726 case JVM_SIGNATURE_ARRAY:
2727 return _obj_arg_handler;
2728 case JVM_SIGNATURE_INT:
2729 case JVM_SIGNATURE_BOOLEAN:
2730 case JVM_SIGNATURE_CHAR:
2731 case JVM_SIGNATURE_BYTE:
2732 case JVM_SIGNATURE_SHORT:
2733 return _int_arg_handler;
2734 }
2735 } else if (total_args_passed == 2 &&
2736 !method->is_static() && (!InlineTypePassFieldsAsArgs || !method->method_holder()->is_inline_klass())) {
2737 switch (method->signature()->char_at(1)) {
2738 case JVM_SIGNATURE_CLASS: {
2739 if (InlineTypePassFieldsAsArgs) {
2740 SignatureStream ss(method->signature());
2741 InlineKlass* vk = ss.as_inline_klass(method->method_holder());
2742 if (vk != nullptr) {
2743 return nullptr;
2744 }
2745 }
2746 return _obj_obj_arg_handler;
2747 }
2748 case JVM_SIGNATURE_ARRAY:
2749 return _obj_obj_arg_handler;
2750 case JVM_SIGNATURE_INT:
2751 case JVM_SIGNATURE_BOOLEAN:
2752 case JVM_SIGNATURE_CHAR:
2753 case JVM_SIGNATURE_BYTE:
2754 case JVM_SIGNATURE_SHORT:
2755 return _obj_int_arg_handler;
2756 }
2757 }
2758 return nullptr;
2759 }
2760
2761 CompiledEntrySignature::CompiledEntrySignature(Method* method) :
2762 _method(method), _num_inline_args(0), _has_inline_recv(false),
2763 _regs(nullptr), _regs_cc(nullptr), _regs_cc_ro(nullptr),
2764 _args_on_stack(0), _args_on_stack_cc(0), _args_on_stack_cc_ro(0),
2765 _c1_needs_stack_repair(false), _c2_needs_stack_repair(false), _supers(nullptr) {
2766 _sig = new GrowableArray<SigEntry>((method != nullptr) ? method->size_of_parameters() : 1);
2767 _sig_cc = new GrowableArray<SigEntry>((method != nullptr) ? method->size_of_parameters() : 1);
2768 _sig_cc_ro = new GrowableArray<SigEntry>((method != nullptr) ? method->size_of_parameters() : 1);
2769 }
2770
2771 // See if we can save space by sharing the same entry for VIEP and VIEP(RO),
2772 // or the same entry for VEP and VIEP(RO).
2773 CodeOffsets::Entries CompiledEntrySignature::c1_inline_ro_entry_type() const {
2774 if (!has_scalarized_args()) {
2775 // VEP/VIEP/VIEP(RO) all share the same entry. There's no packing.
2776 return CodeOffsets::Verified_Entry;
2777 }
2778 if (_method->is_static()) {
2779 // Static methods don't need VIEP(RO)
2780 return CodeOffsets::Verified_Entry;
2781 }
2782
2783 if (has_inline_recv()) {
2784 if (num_inline_args() == 1) {
2785 // Share same entry for VIEP and VIEP(RO).
2786 // This is quite common: we have an instance method in an InlineKlass that has
2787 // no inline type args other than <this>.
2788 return CodeOffsets::Verified_Inline_Entry;
2789 } else {
2790 assert(num_inline_args() > 1, "must be");
2791 // No sharing:
2792 // VIEP(RO) -- <this> is passed as object
2793 // VEP -- <this> is passed as fields
2794 return CodeOffsets::Verified_Inline_Entry_RO;
2795 }
2796 }
2797
2798 // Either a static method, or <this> is not an inline type
2799 if (args_on_stack_cc() != args_on_stack_cc_ro()) {
2800 // No sharing:
2801 // Some arguments are passed on the stack, and we have inserted reserved entries
2802 // into the VEP, but we never insert reserved entries into the VIEP(RO).
2803 return CodeOffsets::Verified_Inline_Entry_RO;
2804 } else {
2805 // Share same entry for VEP and VIEP(RO).
2806 return CodeOffsets::Verified_Entry;
2807 }
2808 }
2809
2810 // Returns all super methods (transitive) in classes and interfaces that are overridden by the current method.
2811 GrowableArray<Method*>* CompiledEntrySignature::get_supers() {
2812 if (_supers != nullptr) {
2813 return _supers;
2814 }
2815 _supers = new GrowableArray<Method*>();
2816 // Skip private, static, and <init> methods
2817 if (_method->is_private() || _method->is_static() || _method->is_object_constructor()) {
2818 return _supers;
2819 }
2820 Symbol* name = _method->name();
2821 Symbol* signature = _method->signature();
2822 const Klass* holder = _method->method_holder()->super();
2823 Symbol* holder_name = holder->name();
2824 JavaThread* current = JavaThread::current();
2825 HandleMark hm(current);
2826 Handle loader(current, _method->method_holder()->class_loader());
2827
2828 // Walk up the class hierarchy and search for super methods
2829 while (holder != nullptr) {
2830 Method* super_method = holder->lookup_method(name, signature);
2831 if (super_method == nullptr) {
2832 break;
2833 }
2834 if (!super_method->is_static() && !super_method->is_private() &&
2835 (!super_method->is_package_private() ||
2836 super_method->method_holder()->is_same_class_package(loader(), holder_name))) {
2837 _supers->push(super_method);
2838 }
2839 holder = super_method->method_holder()->super();
2840 }
2841 // Search interfaces for super methods
2842 Array<InstanceKlass*>* interfaces = _method->method_holder()->transitive_interfaces();
2843 for (int i = 0; i < interfaces->length(); ++i) {
2844 Method* m = interfaces->at(i)->lookup_method(name, signature);
2845 if (m != nullptr && !m->is_static() && m->is_public()) {
2846 _supers->push(m);
2847 }
2848 }
2849 return _supers;
2850 }
2851
2852 bool CompiledEntrySignature::check_supers_and_deoptimize(int arg_num) {
2853 assert(JavaThread::current()->thread_state() == _thread_in_vm, "must be in vm state");
2854
2855 bool scalar_super = false;
2856 bool non_scalar_super = false;
2857
2858 GrowableArray<Method*>* supers = get_supers();
2859 for (int i = 0; i < supers->length(); ++i) {
2860 Method* super_method = supers->at(i);
2861 if (super_method->is_scalarized_arg(arg_num)) {
2862 scalar_super = true;
2863 } else {
2864 non_scalar_super = true;
2865 }
2866 }
2867 #ifdef ASSERT
2868 // Randomly enable below code paths for stress testing
2869 bool stress = StressCallingConvention;
2870 if (stress && (os::random() & 1) == 1) {
2871 non_scalar_super = true;
2872 if ((os::random() & 1) == 1) {
2873 scalar_super = true;
2874 }
2875 }
2876 #endif
2877 if (non_scalar_super) {
2878 // Found a super method with a non-scalarized argument. Fall back to the non-scalarized calling convention.
2879 if (scalar_super) {
2880 // Found non-scalar *and* scalar super methods. We can't handle both.
2881 // Mark the scalar method as mismatch and re-compile call sites to use non-scalarized calling convention.
2882 for (int i = 0; i < supers->length(); ++i) {
2883 Method* super_method = supers->at(i);
2884 if (super_method->is_scalarized_arg(arg_num) DEBUG_ONLY(|| (stress && (os::random() & 1) == 1))) {
2885 JavaThread* thread = JavaThread::current();
2886 HandleMark hm(thread);
2887 methodHandle mh(thread, super_method);
2888 DeoptimizationScope deopt_scope;
2889 {
2890 // Keep the lock scope minimal. Prevent interference with other
2891 // dependency checks by setting mismatch and marking within the lock.
2892 MutexLocker ml(Compile_lock, Mutex::_safepoint_check_flag);
2893 super_method->set_mismatch();
2894 CodeCache::mark_for_deoptimization(&deopt_scope, mh());
2895 }
2896 deopt_scope.deoptimize_marked();
2897 }
2898 }
2899 }
2900 }
2901
2902 return non_scalar_super;
2903 }
2904
2905 // Iterate over arguments and compute scalarized and non-scalarized signatures
2906 void CompiledEntrySignature::compute_calling_conventions(bool link_time) {
2907 assert(JavaThread::current()->thread_state() != _thread_in_native, "must not be in native");
2908 assert(link_time || (_method != nullptr && _method->adapter() != nullptr), "invariant");
2909 bool has_scalarized = false;
2910 if (_method != nullptr) {
2911 InstanceKlass* holder = _method->method_holder();
2912 int arg_num = 0;
2913 if (!_method->is_static()) {
2914 // We shouldn't scalarize 'this' in a value class constructor
2915 if (holder->is_inline_klass() && InlineKlass::cast(holder)->can_be_passed_as_fields() &&
2916 !_method->is_object_constructor() && (link_time || _method->is_scalarized_arg(arg_num))) {
2917 _sig_cc->appendAll(InlineKlass::cast(holder)->extended_sig());
2918 _sig_cc->insert_before(1, SigEntry(T_OBJECT, 0, nullptr, false, true)); // buffer argument
2919 has_scalarized = true;
2920 _has_inline_recv = true;
2921 _num_inline_args++;
2922 } else {
2923 SigEntry::add_entry(_sig_cc, T_OBJECT, holder->name());
2924 }
2925 SigEntry::add_entry(_sig, T_OBJECT, holder->name());
2926 SigEntry::add_entry(_sig_cc_ro, T_OBJECT, holder->name());
2927 arg_num++;
2928 }
2929 for (SignatureStream ss(_method->signature()); !ss.at_return_type(); ss.next()) {
2930 const BasicType bt = ss.type();
2931 if (InlineTypePassFieldsAsArgs && bt == T_OBJECT) {
2932 InlineKlass* vk = ss.as_inline_klass(holder);
2933 if (vk != nullptr && vk->can_be_passed_as_fields() && (link_time || _method->is_scalarized_arg(arg_num))) {
2934 // Check for a calling convention mismatch with super method(s)
2935 if (link_time && check_supers_and_deoptimize(arg_num)) {
2936 // Fall back to non-scalarized calling convention
2937 SigEntry::add_entry(_sig_cc, T_OBJECT, ss.as_symbol());
2938 SigEntry::add_entry(_sig_cc_ro, T_OBJECT, ss.as_symbol());
2939 } else {
2940 _num_inline_args++;
2941 has_scalarized = true;
2942 int last = _sig_cc->length();
2943 int last_ro = _sig_cc_ro->length();
2944 _sig_cc->appendAll(vk->extended_sig());
2945 _sig_cc_ro->appendAll(vk->extended_sig());
2946 // buffer argument
2947 _sig_cc->insert_before(last + 1, SigEntry(T_OBJECT, 0, nullptr, false, true));
2948 _sig_cc_ro->insert_before(last_ro + 1, SigEntry(T_OBJECT, 0, nullptr, false, true));
2949 // Insert InlineTypeNode::NullMarker field right after T_METADATA delimiter
2950 _sig_cc->insert_before(last + 2, SigEntry(T_BOOLEAN, -1, nullptr, true, false));
2951 _sig_cc_ro->insert_before(last_ro + 2, SigEntry(T_BOOLEAN, -1, nullptr, true, false));
2952 }
2953 } else {
2954 SigEntry::add_entry(_sig_cc, T_OBJECT, ss.as_symbol());
2955 SigEntry::add_entry(_sig_cc_ro, T_OBJECT, ss.as_symbol());
2956 }
2957 } else {
2958 SigEntry::add_entry(_sig_cc, ss.type(), ss.as_symbol());
2959 SigEntry::add_entry(_sig_cc_ro, ss.type(), ss.as_symbol());
2960 }
2961 SigEntry::add_entry(_sig, bt, ss.as_symbol());
2962 if (bt != T_VOID) {
2963 arg_num++;
2964 }
2965 }
2966 }
2967
2968 // Compute the non-scalarized calling convention
2969 _regs = NEW_RESOURCE_ARRAY(VMRegPair, _sig->length());
2970 _args_on_stack = SharedRuntime::java_calling_convention(_sig, _regs);
2971
2972 // Compute the scalarized calling conventions if there are scalarized inline types in the signature
2973 if (has_scalarized && !_method->is_native()) {
2974 _regs_cc = NEW_RESOURCE_ARRAY(VMRegPair, _sig_cc->length());
2975 _args_on_stack_cc = SharedRuntime::java_calling_convention(_sig_cc, _regs_cc);
2976
2977 _regs_cc_ro = NEW_RESOURCE_ARRAY(VMRegPair, _sig_cc_ro->length());
2978 _args_on_stack_cc_ro = SharedRuntime::java_calling_convention(_sig_cc_ro, _regs_cc_ro);
2979
2980 _c1_needs_stack_repair = (_args_on_stack_cc < _args_on_stack) || (_args_on_stack_cc_ro < _args_on_stack);
2981 _c2_needs_stack_repair = (_args_on_stack_cc > _args_on_stack) || (_args_on_stack_cc > _args_on_stack_cc_ro);
2982
2983 // Upper bound on stack arguments to avoid hitting the argument limit and
2984 // bailing out of compilation ("unsupported incoming calling sequence").
2985 // TODO 8281260 We need a reasonable limit (flag?) here
2986 if (MAX2(_args_on_stack_cc, _args_on_stack_cc_ro) <= 75) {
2987 return; // Success
2988 }
2989 }
2990
2991 // No scalarized args
2992 _sig_cc = _sig;
2993 _regs_cc = _regs;
2994 _args_on_stack_cc = _args_on_stack;
2995
2996 _sig_cc_ro = _sig;
2997 _regs_cc_ro = _regs;
2998 _args_on_stack_cc_ro = _args_on_stack;
2999 }
3000
3001 void CompiledEntrySignature::initialize_from_fingerprint(AdapterFingerPrint* fingerprint) {
3002 _has_inline_recv = fingerprint->has_ro_adapter();
3003
3004 int value_object_count = 0;
3005 BasicType prev_bt = T_ILLEGAL;
3006 bool has_scalarized_arguments = false;
3007 bool long_prev = false;
3008 int long_prev_offset = -1;
3009 bool skipping_inline_recv = false;
3010 bool receiver_handled = false;
3011
3012 fingerprint->iterate_args([&] (const AdapterFingerPrint::Element& arg) {
3013 BasicType bt = arg.bt();
3014 int offset = arg.offset();
3015
3016 if (long_prev) {
3017 long_prev = false;
3018 BasicType bt_to_add;
3019 if (bt == T_VOID) {
3020 bt_to_add = T_LONG;
3021 } else {
3022 bt_to_add = T_OBJECT;
3023 }
3024 if (value_object_count == 0) {
3025 SigEntry::add_entry(_sig, bt_to_add);
3026 }
3027 assert(long_prev_offset != 0, "no buffer argument here");
3028 SigEntry::add_entry(_sig_cc, bt_to_add, nullptr, long_prev_offset);
3029 if (!skipping_inline_recv) {
3030 SigEntry::add_entry(_sig_cc_ro, bt_to_add, nullptr, long_prev_offset);
3031 }
3032 }
3033
3034 switch (bt) {
3035 case T_VOID:
3036 if (prev_bt != T_LONG && prev_bt != T_DOUBLE) {
3037 assert(InlineTypePassFieldsAsArgs, "unexpected end of inline type");
3038 value_object_count--;
3039 SigEntry::add_entry(_sig_cc, T_VOID, nullptr, offset);
3040 if (!skipping_inline_recv) {
3041 SigEntry::add_entry(_sig_cc_ro, T_VOID, nullptr, offset);
3042 } else if (value_object_count == 0) {
3043 skipping_inline_recv = false;
3044 }
3045 assert(value_object_count >= 0, "invalid value object count");
3046 } else {
3047 // Nothing to add for _sig: We already added an addition T_VOID in add_entry() when adding T_LONG or T_DOUBLE.
3048 }
3049 break;
3050 case T_INT:
3051 case T_FLOAT:
3052 case T_DOUBLE:
3053 if (value_object_count == 0) {
3054 SigEntry::add_entry(_sig, bt);
3055 }
3056 SigEntry::add_entry(_sig_cc, bt, nullptr, offset);
3057 if (!skipping_inline_recv) {
3058 SigEntry::add_entry(_sig_cc_ro, bt, nullptr, offset);
3059 }
3060 break;
3061 case T_LONG:
3062 long_prev = true;
3063 long_prev_offset = offset;
3064 break;
3065 case T_BOOLEAN:
3066 case T_CHAR:
3067 case T_BYTE:
3068 case T_SHORT:
3069 case T_OBJECT:
3070 case T_ARRAY:
3071 assert(value_object_count > 0, "must be value object field");
3072 assert(offset != 0 || (bt == T_OBJECT && prev_bt == T_METADATA), "buffer input expected here");
3073 SigEntry::add_entry(_sig_cc, bt, nullptr, offset, offset == -1, offset == 0);
3074 if (!skipping_inline_recv) {
3075 SigEntry::add_entry(_sig_cc_ro, bt, nullptr, offset, offset == -1, offset == 0);
3076 }
3077 break;
3078 case T_METADATA:
3079 assert(InlineTypePassFieldsAsArgs, "unexpected start of inline type");
3080 if (value_object_count == 0) {
3081 SigEntry::add_entry(_sig, T_OBJECT);
3082 }
3083 SigEntry::add_entry(_sig_cc, T_METADATA, nullptr, offset);
3084 if (!skipping_inline_recv) {
3085 if (!receiver_handled && _has_inline_recv && value_object_count == 0) {
3086 SigEntry::add_entry(_sig_cc_ro, T_OBJECT);
3087 skipping_inline_recv = true;
3088 receiver_handled = true;
3089 } else {
3090 SigEntry::add_entry(_sig_cc_ro, T_METADATA, nullptr, offset);
3091 }
3092 }
3093 value_object_count++;
3094 has_scalarized_arguments = true;
3095 break;
3096 default: {
3097 fatal("Unexpected BasicType: %s", basictype_to_str(bt));
3098 }
3099 }
3100 prev_bt = bt;
3101 });
3102
3103 if (long_prev) {
3104 // If previous bt was T_LONG and we reached the end of the signature, we know that it must be a T_OBJECT.
3105 SigEntry::add_entry(_sig, T_OBJECT);
3106 SigEntry::add_entry(_sig_cc, T_OBJECT);
3107 SigEntry::add_entry(_sig_cc_ro, T_OBJECT);
3108 }
3109 assert(value_object_count == 0, "invalid value object count");
3110
3111 #ifdef ASSERT
3112 if (_has_inline_recv) {
3113 // In RO signatures, inline receivers must be represented as a single T_OBJECT
3114 assert(_sig_cc_ro->length() >= 1, "sig_cc_ro must include receiver");
3115 assert(_sig_cc_ro->at(0)._bt == T_OBJECT,
3116 "sig_cc_ro must represent inline receiver as T_OBJECT");
3117 assert(_sig_cc_ro->length() <= _sig_cc->length(),
3118 "sig_cc_ro must not be longer than sig_cc");
3119 }
3120 #endif
3121
3122 _regs = NEW_RESOURCE_ARRAY(VMRegPair, _sig->length());
3123 _args_on_stack = SharedRuntime::java_calling_convention(_sig, _regs);
3124
3125 // Compute the scalarized calling conventions if there are scalarized inline types in the signature
3126 if (has_scalarized_arguments) {
3127 _regs_cc = NEW_RESOURCE_ARRAY(VMRegPair, _sig_cc->length());
3128 _args_on_stack_cc = SharedRuntime::java_calling_convention(_sig_cc, _regs_cc);
3129
3130 _regs_cc_ro = NEW_RESOURCE_ARRAY(VMRegPair, _sig_cc_ro->length());
3131 _args_on_stack_cc_ro = SharedRuntime::java_calling_convention(_sig_cc_ro, _regs_cc_ro);
3132
3133 _c1_needs_stack_repair = (_args_on_stack_cc < _args_on_stack) || (_args_on_stack_cc_ro < _args_on_stack);
3134 _c2_needs_stack_repair = (_args_on_stack_cc > _args_on_stack) || (_args_on_stack_cc > _args_on_stack_cc_ro);
3135 } else {
3136 // No scalarized args
3137 _sig_cc = _sig;
3138 _regs_cc = _regs;
3139 _args_on_stack_cc = _args_on_stack;
3140
3141 _sig_cc_ro = _sig;
3142 _regs_cc_ro = _regs;
3143 _args_on_stack_cc_ro = _args_on_stack;
3144 }
3145
3146 #ifdef ASSERT
3147 {
3148 AdapterFingerPrint* compare_fp = AdapterFingerPrint::allocate(_sig_cc, _has_inline_recv);
3149 assert(fingerprint->equals(compare_fp), "%s - %s", fingerprint->as_string(), compare_fp->as_string());
3150 AdapterFingerPrint::deallocate(compare_fp);
3151 }
3152 #endif
3153 }
3154
3155 const char* AdapterHandlerEntry::_entry_names[] = {
3156 "i2c", "c2i", "c2i_unverified", "c2i_no_clinit_check"
3157 };
3158
3159 #ifdef ASSERT
3160 void AdapterHandlerLibrary::verify_adapter_sharing(CompiledEntrySignature& ces, AdapterHandlerEntry* cached_entry) {
3161 // we can only check for the same code if there is any
3162 #ifndef ZERO
3163 AdapterHandlerEntry* comparison_entry = create_adapter(ces, false, true);
3164 assert(comparison_entry->adapter_blob() == nullptr, "no blob should be created when creating an adapter for comparison");
3165 assert(comparison_entry->compare_code(cached_entry), "code must match");
3166 // Release the one just created
3167 AdapterHandlerEntry::deallocate(comparison_entry);
3168 # endif // ZERO
3169 }
3170 #endif /* ASSERT*/
3171
3172 AdapterHandlerEntry* AdapterHandlerLibrary::get_adapter(const methodHandle& method) {
3173 assert(!method->is_abstract() || InlineTypePassFieldsAsArgs, "abstract methods do not have adapters");
3174 // Use customized signature handler. Need to lock around updates to
3175 // the _adapter_handler_table (it is not safe for concurrent readers
3176 // and a single writer: this could be fixed if it becomes a
3177 // problem).
3178
3179 // Fast-path for trivial adapters
3180 AdapterHandlerEntry* entry = get_simple_adapter(method);
3181 if (entry != nullptr) {
3182 return entry;
3183 }
3184
3185 ResourceMark rm;
3186 bool new_entry = false;
3187
3188 CompiledEntrySignature ces(method());
3189 ces.compute_calling_conventions();
3190 if (ces.has_scalarized_args()) {
3191 if (!method->has_scalarized_args()) {
3192 method->set_has_scalarized_args();
3193 }
3194 if (ces.c1_needs_stack_repair()) {
3195 method->set_c1_needs_stack_repair();
3196 }
3197 if (ces.c2_needs_stack_repair() && !method->c2_needs_stack_repair()) {
3198 method->set_c2_needs_stack_repair();
3199 }
3200 }
3201
3202 {
3203 MutexLocker mu(AdapterHandlerLibrary_lock);
3204
3205 // Lookup method signature's fingerprint
3206 entry = lookup(ces.sig_cc(), ces.has_inline_recv());
3207
3208 if (entry != nullptr) {
3209 #ifndef ZERO
3210 assert(entry->is_linked(), "AdapterHandlerEntry must have been linked");
3211 #endif
3212 #ifdef ASSERT
3213 if (!entry->in_aot_cache() && VerifyAdapterSharing) {
3214 verify_adapter_sharing(ces, entry);
3215 }
3216 #endif
3217 } else {
3218 entry = create_adapter(ces, /* allocate_code_blob */ true);
3219 if (entry != nullptr) {
3220 new_entry = true;
3221 }
3222 }
3223 }
3224
3225 // Outside of the lock
3226 if (new_entry) {
3227 post_adapter_creation(entry);
3228 }
3229 return entry;
3230 }
3231
3232 void AdapterHandlerLibrary::lookup_aot_cache(AdapterHandlerEntry* handler) {
3233 ResourceMark rm;
3234 const char* name = AdapterHandlerLibrary::name(handler);
3235 const uint32_t id = AdapterHandlerLibrary::id(handler);
3236
3237 CodeBlob* blob = AOTCodeCache::load_code_blob(AOTCodeEntry::Adapter, id, name);
3238 if (blob != nullptr) {
3253 }
3254 insts_size = adapter_blob->code_size();
3255 st->print_cr("i2c argument handler for: %s %s (%d bytes generated)",
3256 handler->fingerprint()->as_basic_args_string(),
3257 handler->fingerprint()->as_string(), insts_size);
3258 st->print_cr("c2i argument handler starts at " INTPTR_FORMAT, p2i(handler->get_c2i_entry()));
3259 if (Verbose || PrintStubCode) {
3260 address first_pc = adapter_blob->content_begin();
3261 if (first_pc != nullptr) {
3262 Disassembler::decode(first_pc, first_pc + insts_size, st, &adapter_blob->asm_remarks());
3263 st->cr();
3264 }
3265 }
3266 }
3267 #endif // PRODUCT
3268
3269 void AdapterHandlerLibrary::address_to_offset(address entry_address[AdapterBlob::ENTRY_COUNT],
3270 int entry_offset[AdapterBlob::ENTRY_COUNT]) {
3271 entry_offset[AdapterBlob::I2C] = 0;
3272 entry_offset[AdapterBlob::C2I] = entry_address[AdapterBlob::C2I] - entry_address[AdapterBlob::I2C];
3273 entry_offset[AdapterBlob::C2I_Inline] = entry_address[AdapterBlob::C2I_Inline] - entry_address[AdapterBlob::I2C];
3274 entry_offset[AdapterBlob::C2I_Inline_RO] = entry_address[AdapterBlob::C2I_Inline_RO] - entry_address[AdapterBlob::I2C];
3275 entry_offset[AdapterBlob::C2I_Unverified] = entry_address[AdapterBlob::C2I_Unverified] - entry_address[AdapterBlob::I2C];
3276 entry_offset[AdapterBlob::C2I_Unverified_Inline] = entry_address[AdapterBlob::C2I_Unverified_Inline] - entry_address[AdapterBlob::I2C];
3277 if (entry_address[AdapterBlob::C2I_No_Clinit_Check] == nullptr) {
3278 entry_offset[AdapterBlob::C2I_No_Clinit_Check] = -1;
3279 } else {
3280 entry_offset[AdapterBlob::C2I_No_Clinit_Check] = entry_address[AdapterBlob::C2I_No_Clinit_Check] - entry_address[AdapterBlob::I2C];
3281 }
3282 }
3283
3284 bool AdapterHandlerLibrary::generate_adapter_code(AdapterHandlerEntry* handler,
3285 CompiledEntrySignature& ces,
3286 bool allocate_code_blob,
3287 bool is_transient) {
3288 if (log_is_enabled(Info, perf, class, link)) {
3289 ClassLoader::perf_method_adapters_count()->inc();
3290 }
3291
3292 #ifndef ZERO
3293 AdapterBlob* adapter_blob = nullptr;
3294 BufferBlob* buf = buffer_blob(); // the temporary code buffer in CodeCache
3295 CodeBuffer buffer(buf);
3296 short buffer_locs[20];
3297 buffer.insts()->initialize_shared_locs((relocInfo*)buffer_locs,
3298 sizeof(buffer_locs)/sizeof(relocInfo));
3299 MacroAssembler masm(&buffer);
3300 address entry_address[AdapterBlob::ENTRY_COUNT];
3301
3302 // Get a description of the compiled java calling convention and the largest used (VMReg) stack slot usage
3303 SharedRuntime::generate_i2c2i_adapters(&masm,
3304 ces.args_on_stack(),
3305 ces.sig(),
3306 ces.regs(),
3307 ces.sig_cc(),
3308 ces.regs_cc(),
3309 ces.sig_cc_ro(),
3310 ces.regs_cc_ro(),
3311 entry_address,
3312 adapter_blob,
3313 allocate_code_blob);
3314
3315 if (ces.has_scalarized_args()) {
3316 // Save a C heap allocated version of the scalarized signature and store it in the adapter
3317 GrowableArray<SigEntry>* heap_sig = new (mtCode) GrowableArray<SigEntry>(ces.sig_cc()->length(), mtCode);
3318 heap_sig->appendAll(ces.sig_cc());
3319 handler->set_sig_cc(heap_sig);
3320 heap_sig = new (mtCode) GrowableArray<SigEntry>(ces.sig_cc_ro()->length(), mtCode);
3321 heap_sig->appendAll(ces.sig_cc_ro());
3322 handler->set_sig_cc_ro(heap_sig);
3323 }
3324 // On zero there is no code to save and no need to create a blob and
3325 // or relocate the handler.
3326 int entry_offset[AdapterBlob::ENTRY_COUNT];
3327 address_to_offset(entry_address, entry_offset);
3328 #ifdef ASSERT
3329 if (VerifyAdapterSharing) {
3330 handler->save_code(buf->code_begin(), buffer.insts_size());
3331 if (is_transient) {
3332 return true;
3333 }
3334 }
3335 #endif
3336 if (adapter_blob == nullptr) {
3337 // CodeCache is full, disable compilation
3338 // Ought to log this but compile log is only per compile thread
3339 // and we're some non descript Java thread.
3340 return false;
3341 }
3342 handler->set_adapter_blob(adapter_blob);
3343 if (!is_transient && AOTCodeCache::is_dumping_adapter()) {
3344 // try to save generated code
3345 const char* name = AdapterHandlerLibrary::name(handler);
3346 const uint32_t id = AdapterHandlerLibrary::id(handler);
3347 bool success = AOTCodeCache::store_code_blob(*adapter_blob, AOTCodeEntry::Adapter, id, name);
3348 assert(success || !AOTCodeCache::is_dumping_adapter(), "caching of adapter must be disabled");
3349 }
3350 #endif // ZERO
3351
3352 #ifndef PRODUCT
3353 // debugging support
3354 if (PrintAdapterHandlers || PrintStubCode) {
3355 print_adapter_handler_info(tty, handler);
3356 }
3357 #endif
3358
3359 return true;
3360 }
3361
3362 AdapterHandlerEntry* AdapterHandlerLibrary::create_adapter(CompiledEntrySignature& ces,
3363 bool allocate_code_blob,
3364 bool is_transient) {
3365 AdapterFingerPrint* fp = AdapterFingerPrint::allocate(ces.sig_cc(), ces.has_inline_recv());
3366 #ifdef ASSERT
3367 // Verify that we can successfully restore the compiled entry signature object.
3368 CompiledEntrySignature ces_verify;
3369 ces_verify.initialize_from_fingerprint(fp);
3370 #endif
3371 AdapterHandlerEntry* handler = AdapterHandlerLibrary::new_entry(fp);
3372 if (!generate_adapter_code(handler, ces, allocate_code_blob, is_transient)) {
3373 AdapterHandlerEntry::deallocate(handler);
3374 return nullptr;
3375 }
3376 if (!is_transient) {
3377 assert_lock_strong(AdapterHandlerLibrary_lock);
3378 _adapter_handler_table->put(fp, handler);
3379 }
3380 return handler;
3381 }
3382
3383 #if INCLUDE_CDS
3384 void AdapterHandlerEntry::remove_unshareable_info() {
3385 #ifdef ASSERT
3386 _saved_code = nullptr;
3387 _saved_code_length = 0;
3388 #endif // ASSERT
3389 _adapter_blob = nullptr;
3390 _linked = false;
3391 _sig_cc = nullptr;
3392 _sig_cc_ro = nullptr;
3393 }
3394
3395 class CopyAdapterTableToArchive : StackObj {
3396 private:
3397 CompactHashtableWriter* _writer;
3398 ArchiveBuilder* _builder;
3399 public:
3400 CopyAdapterTableToArchive(CompactHashtableWriter* writer) : _writer(writer),
3401 _builder(ArchiveBuilder::current())
3402 {}
3403
3404 bool do_entry(AdapterFingerPrint* fp, AdapterHandlerEntry* entry) {
3405 LogStreamHandle(Trace, aot) lsh;
3406 if (ArchiveBuilder::current()->has_been_archived((address)entry)) {
3407 assert(ArchiveBuilder::current()->has_been_archived((address)fp), "must be");
3408 AdapterFingerPrint* buffered_fp = ArchiveBuilder::current()->get_buffered_addr(fp);
3409 assert(buffered_fp != nullptr,"sanity check");
3410 AdapterHandlerEntry* buffered_entry = ArchiveBuilder::current()->get_buffered_addr(entry);
3411 assert(buffered_entry != nullptr,"sanity check");
3412
3452 }
3453 #endif
3454 }
3455
3456 // This method is used during production run to link archived adapters (stored in AOT Cache)
3457 // to their code in AOT Code Cache
3458 void AdapterHandlerEntry::link() {
3459 ResourceMark rm;
3460 assert(_fingerprint != nullptr, "_fingerprint must not be null");
3461 bool generate_code = false;
3462 // Generate code only if AOTCodeCache is not available, or
3463 // caching adapters is disabled, or we fail to link
3464 // the AdapterHandlerEntry to its code in the AOTCodeCache
3465 if (AOTCodeCache::is_using_adapter()) {
3466 AdapterHandlerLibrary::link_aot_adapter_handler(this);
3467 // If link_aot_adapter_handler() succeeds, _adapter_blob will be non-null
3468 if (_adapter_blob == nullptr) {
3469 log_warning(aot)("Failed to link AdapterHandlerEntry (fp=%s) to its code in the AOT code cache", _fingerprint->as_basic_args_string());
3470 generate_code = true;
3471 }
3472
3473 if (get_sig_cc() == nullptr) {
3474 // Calling conventions have to be regenerated at runtime and are accessed through method adapters,
3475 // which are archived in the AOT code cache. If the adapters are not regenerated, the
3476 // calling conventions should be regenerated here.
3477 CompiledEntrySignature ces;
3478 ces.initialize_from_fingerprint(_fingerprint);
3479 if (ces.has_scalarized_args()) {
3480 // Save a C heap allocated version of the scalarized signature and store it in the adapter
3481 GrowableArray<SigEntry>* heap_sig = new (mtCode) GrowableArray<SigEntry>(ces.sig_cc()->length(), mtCode);
3482 heap_sig->appendAll(ces.sig_cc());
3483 set_sig_cc(heap_sig);
3484 heap_sig = new (mtCode) GrowableArray<SigEntry>(ces.sig_cc_ro()->length(), mtCode);
3485 heap_sig->appendAll(ces.sig_cc_ro());
3486 set_sig_cc_ro(heap_sig);
3487 }
3488 }
3489 } else {
3490 generate_code = true;
3491 }
3492 if (generate_code) {
3493 CompiledEntrySignature ces;
3494 ces.initialize_from_fingerprint(_fingerprint);
3495 if (!AdapterHandlerLibrary::generate_adapter_code(this, ces, true, false)) {
3496 // Don't throw exceptions during VM initialization because java.lang.* classes
3497 // might not have been initialized, causing problems when constructing the
3498 // Java exception object.
3499 vm_exit_during_initialization("Out of space in CodeCache for adapters");
3500 }
3501 }
3502 if (_adapter_blob != nullptr) {
3503 post_adapter_creation(this);
3504 }
3505 assert(_linked, "AdapterHandlerEntry must now be linked");
3506 }
3507
3508 void AdapterHandlerLibrary::link_aot_adapters() {
3509 uint max_id = 0;
3510 assert(AOTCodeCache::is_using_adapter(), "AOT adapters code should be available");
3511 /* It is possible that some adapters generated in assembly phase are not stored in the cache.
3512 * That implies adapter ids of the adapters in the cache may not be contiguous.
3513 * If the size of the _aot_adapter_handler_table is used to initialize _id_counter, then it may
3514 * result in collision of adapter ids between AOT stored handlers and runtime generated handlers.
3515 * To avoid such situation, initialize the _id_counter with the largest adapter id among the AOT stored handlers.
3516 */
3517 _aot_adapter_handler_table.iterate_all([&](AdapterHandlerEntry* entry) {
3518 assert(!entry->is_linked(), "AdapterHandlerEntry is already linked!");
3519 entry->link();
3520 max_id = MAX2(max_id, entry->id());
3521 });
3522 // Set adapter id to the maximum id found in the AOTCache
3523 assert(_id_counter == 0, "Did not expect new AdapterHandlerEntry to be created at this stage");
3524 _id_counter = max_id;
3525 }
3526
3527 // This method is called during production run to lookup simple adapters
3528 // in the archived adapter handler table
3529 void AdapterHandlerLibrary::lookup_simple_adapters() {
3530 assert(!_aot_adapter_handler_table.empty(), "archived adapter handler table is empty");
3531
3532 MutexLocker mu(AdapterHandlerLibrary_lock);
3533 ResourceMark rm;
3534 CompiledEntrySignature no_args;
3535 no_args.compute_calling_conventions();
3536 _no_arg_handler = lookup(no_args.sig_cc(), no_args.has_inline_recv());
3537
3538 CompiledEntrySignature obj_args;
3539 SigEntry::add_entry(obj_args.sig(), T_OBJECT);
3540 obj_args.compute_calling_conventions();
3541 _obj_arg_handler = lookup(obj_args.sig_cc(), obj_args.has_inline_recv());
3542
3543 CompiledEntrySignature int_args;
3544 SigEntry::add_entry(int_args.sig(), T_INT);
3545 int_args.compute_calling_conventions();
3546 _int_arg_handler = lookup(int_args.sig_cc(), int_args.has_inline_recv());
3547
3548 CompiledEntrySignature obj_int_args;
3549 SigEntry::add_entry(obj_int_args.sig(), T_OBJECT);
3550 SigEntry::add_entry(obj_int_args.sig(), T_INT);
3551 obj_int_args.compute_calling_conventions();
3552 _obj_int_arg_handler = lookup(obj_int_args.sig_cc(), obj_int_args.has_inline_recv());
3553
3554 CompiledEntrySignature obj_obj_args;
3555 SigEntry::add_entry(obj_obj_args.sig(), T_OBJECT);
3556 SigEntry::add_entry(obj_obj_args.sig(), T_OBJECT);
3557 obj_obj_args.compute_calling_conventions();
3558 _obj_obj_arg_handler = lookup(obj_obj_args.sig_cc(), obj_obj_args.has_inline_recv());
3559
3560 assert(_no_arg_handler != nullptr &&
3561 _obj_arg_handler != nullptr &&
3562 _int_arg_handler != nullptr &&
3563 _obj_int_arg_handler != nullptr &&
3564 _obj_obj_arg_handler != nullptr, "Initial adapters not found in archived adapter handler table");
3565 assert(_no_arg_handler->is_linked() &&
3566 _obj_arg_handler->is_linked() &&
3567 _int_arg_handler->is_linked() &&
3568 _obj_int_arg_handler->is_linked() &&
3569 _obj_obj_arg_handler->is_linked(), "Initial adapters not in linked state");
3570 }
3571 #endif // INCLUDE_CDS
3572
3573 void AdapterHandlerEntry::metaspace_pointers_do(MetaspaceClosure* it) {
3574 LogStreamHandle(Trace, aot) lsh;
3575 if (lsh.is_enabled()) {
3576 lsh.print("Iter(AdapterHandlerEntry): %p(%s)", this, _fingerprint->as_basic_args_string());
3577 lsh.cr();
3578 }
3579 it->push(&_fingerprint);
3580 }
3581
3582 AdapterHandlerEntry::~AdapterHandlerEntry() {
3583 if (_fingerprint != nullptr) {
3584 AdapterFingerPrint::deallocate(_fingerprint);
3585 _fingerprint = nullptr;
3586 }
3587 if (_sig_cc != nullptr) {
3588 delete _sig_cc;
3589 }
3590 if (_sig_cc_ro != nullptr) {
3591 delete _sig_cc_ro;
3592 }
3593 #ifdef ASSERT
3594 FREE_C_HEAP_ARRAY(_saved_code);
3595 #endif
3596 FreeHeap(this);
3597 }
3598
3599
3600 #ifdef ASSERT
3601 // Capture the code before relocation so that it can be compared
3602 // against other versions. If the code is captured after relocation
3603 // then relative instructions won't be equivalent.
3604 void AdapterHandlerEntry::save_code(unsigned char* buffer, int length) {
3605 _saved_code = NEW_C_HEAP_ARRAY(unsigned char, length, mtCode);
3606 _saved_code_length = length;
3607 memcpy(_saved_code, buffer, length);
3608 }
3609
3610
3611 bool AdapterHandlerEntry::compare_code(AdapterHandlerEntry* other) {
3612 assert(_saved_code != nullptr && other->_saved_code != nullptr, "code not saved");
3662 struct { double data[20]; } stubs_locs_buf;
3663 buffer.insts()->initialize_shared_locs((relocInfo*)&locs_buf, sizeof(locs_buf) / sizeof(relocInfo));
3664 #if defined(AARCH64)
3665 // On AArch64 with ZGC and nmethod entry barriers, we need all oops to be
3666 // in the constant pool to ensure ordering between the barrier and oops
3667 // accesses. For native_wrappers we need a constant.
3668 buffer.initialize_consts_size(8);
3669 #elif defined(PPC64) || defined(S390)
3670 // On PPC64/S390 the continuation enter intrinsic needs the constant pool for the compiled
3671 // static java call that is resolved in the runtime.
3672 if (method->is_continuation_enter_intrinsic()) {
3673 buffer.initialize_consts_size(8 PPC64_ONLY(+ 24) S390_ONLY(+ 17));
3674 }
3675 #endif
3676 buffer.stubs()->initialize_shared_locs((relocInfo*)&stubs_locs_buf, sizeof(stubs_locs_buf) / sizeof(relocInfo));
3677 MacroAssembler _masm(&buffer);
3678
3679 // Fill in the signature array, for the calling-convention call.
3680 const int total_args_passed = method->size_of_parameters();
3681
3682 BasicType stack_sig_bt[16];
3683 VMRegPair stack_regs[16];
3684 BasicType* sig_bt = (total_args_passed <= 16) ? stack_sig_bt : NEW_RESOURCE_ARRAY(BasicType, total_args_passed);
3685 VMRegPair* regs = (total_args_passed <= 16) ? stack_regs : NEW_RESOURCE_ARRAY(VMRegPair, total_args_passed);
3686
3687 int i = 0;
3688 if (!method->is_static()) { // Pass in receiver first
3689 sig_bt[i++] = T_OBJECT;
3690 }
3691 SignatureStream ss(method->signature());
3692 for (; !ss.at_return_type(); ss.next()) {
3693 sig_bt[i++] = ss.type(); // Collect remaining bits of signature
3694 if (ss.type() == T_LONG || ss.type() == T_DOUBLE) {
3695 sig_bt[i++] = T_VOID; // Longs & doubles take 2 Java slots
3696 }
3697 }
3698 assert(i == total_args_passed, "");
3699 BasicType ret_type = ss.type();
3700
3701 // Now get the compiled-Java arguments layout.
3702 SharedRuntime::java_calling_convention(sig_bt, regs, total_args_passed);
3703
3704 // Generate the compiled-to-native wrapper code
3705 nm = SharedRuntime::generate_native_wrapper(&_masm, method, compile_id, sig_bt, regs, ret_type);
3706
3707 if (nm != nullptr) {
3708 {
3709 MutexLocker pl(NMethodState_lock, Mutex::_no_safepoint_check_flag);
3710 if (nm->make_in_use()) {
3711 method->set_code(method, nm);
3712 }
3713 }
3714
3715 CompilerDirectiveMatcher matcher(method, CompLevel_simple);
3716 if (matcher.directive_set()->PrintAssemblyOption) {
3717 nm->print_code();
3718 }
3719 }
3926 if (b == handler->adapter_blob()) {
3927 found = true;
3928 st->print("Adapter for signature: ");
3929 handler->print_adapter_on(st);
3930 return false; // abort iteration
3931 } else {
3932 return true; // keep looking
3933 }
3934 };
3935 assert_locked_or_safepoint(AdapterHandlerLibrary_lock);
3936 _adapter_handler_table->iterate(findblob_runtime_table);
3937 }
3938 assert(found, "Should have found handler");
3939 }
3940
3941 void AdapterHandlerEntry::print_adapter_on(outputStream* st) const {
3942 st->print("AHE@" INTPTR_FORMAT ": %s", p2i(this), fingerprint()->as_string());
3943 if (adapter_blob() != nullptr) {
3944 st->print(" i2c: " INTPTR_FORMAT, p2i(get_i2c_entry()));
3945 st->print(" c2i: " INTPTR_FORMAT, p2i(get_c2i_entry()));
3946 st->print(" c2iVE: " INTPTR_FORMAT, p2i(get_c2i_inline_entry()));
3947 st->print(" c2iVROE: " INTPTR_FORMAT, p2i(get_c2i_inline_ro_entry()));
3948 st->print(" c2iUE: " INTPTR_FORMAT, p2i(get_c2i_unverified_entry()));
3949 st->print(" c2iUVE: " INTPTR_FORMAT, p2i(get_c2i_unverified_inline_entry()));
3950 if (get_c2i_no_clinit_check_entry() != nullptr) {
3951 st->print(" c2iNCI: " INTPTR_FORMAT, p2i(get_c2i_no_clinit_check_entry()));
3952 }
3953 }
3954 st->cr();
3955 }
3956
3957 #ifndef PRODUCT
3958
3959 void AdapterHandlerLibrary::print_statistics() {
3960 print_table_statistics();
3961 }
3962
3963 #endif /* PRODUCT */
3964
3965 JRT_LEAF(void, SharedRuntime::enable_stack_reserved_zone(JavaThread* current))
3966 assert(current == JavaThread::current(), "pre-condition");
3967 StackOverflow* overflow_state = current->stack_overflow_state();
3968 overflow_state->enable_stack_reserved_zone(/*check_if_disabled*/true);
3969 overflow_state->set_reserved_stack_activation(current->stack_base());
4016 event.set_method(method);
4017 event.commit();
4018 }
4019 }
4020 }
4021 return activation;
4022 }
4023
4024 void SharedRuntime::on_slowpath_allocation_exit(JavaThread* current) {
4025 // After any safepoint, just before going back to compiled code,
4026 // we inform the GC that we will be doing initializing writes to
4027 // this object in the future without emitting card-marks, so
4028 // GC may take any compensating steps.
4029
4030 oop new_obj = current->vm_result_oop();
4031 if (new_obj == nullptr) return;
4032
4033 BarrierSet *bs = BarrierSet::barrier_set();
4034 bs->on_slowpath_allocation_exit(current, new_obj);
4035 }
4036
4037 // We are at a compiled code to interpreter call. We need backing
4038 // buffers for all inline type arguments. Allocate an object array to
4039 // hold them (convenient because once we're done with it we don't have
4040 // to worry about freeing it).
4041 oop SharedRuntime::allocate_inline_types_impl(JavaThread* current, methodHandle callee, bool allocate_receiver, bool from_c1, TRAPS) {
4042 assert(InlineTypePassFieldsAsArgs, "no reason to call this");
4043 ResourceMark rm;
4044
4045 // Retrieve arguments passed at the call
4046 RegisterMap reg_map2(THREAD,
4047 RegisterMap::UpdateMap::include,
4048 RegisterMap::ProcessFrames::include,
4049 RegisterMap::WalkContinuation::skip);
4050 frame stubFrame = THREAD->last_frame();
4051 frame callerFrame = stubFrame.sender(®_map2);
4052 if (from_c1) {
4053 callerFrame = callerFrame.sender(®_map2);
4054 }
4055 int arg_size;
4056 const GrowableArray<SigEntry>* sig = allocate_receiver ? callee->adapter()->get_sig_cc() : callee->adapter()->get_sig_cc_ro();
4057 assert(sig != nullptr, "sig should never be null");
4058 TempNewSymbol tmp_sig = SigEntry::create_symbol(sig);
4059 VMRegPair* reg_pairs = find_callee_arguments(tmp_sig, false, false, &arg_size);
4060
4061 int nb_slots = 0;
4062 InstanceKlass* holder = callee->method_holder();
4063 allocate_receiver &= !callee->is_static() && holder->is_inline_klass() && callee->is_scalarized_arg(0);
4064 if (allocate_receiver) {
4065 nb_slots++;
4066 }
4067 int arg_num = callee->is_static() ? 0 : 1;
4068 for (SignatureStream ss(callee->signature()); !ss.at_return_type(); ss.next()) {
4069 BasicType bt = ss.type();
4070 if (bt == T_OBJECT && callee->is_scalarized_arg(arg_num)) {
4071 nb_slots++;
4072 }
4073 if (bt != T_VOID) {
4074 arg_num++;
4075 }
4076 }
4077 objArrayOop array_oop = nullptr;
4078 objArrayHandle array;
4079 arg_num = callee->is_static() ? 0 : 1;
4080 int i = 0;
4081 uint pos = 0;
4082 uint depth = 0;
4083 uint ignored = 0;
4084 if (allocate_receiver) {
4085 assert(sig->at(pos)._bt == T_METADATA, "scalarized value expected");
4086 pos++;
4087 ignored++;
4088 depth++;
4089 assert(sig->at(pos)._bt == T_OBJECT, "buffer argument");
4090 uint reg_pos = 0;
4091 assert(reg_pos < (uint)arg_size, "");
4092 VMRegPair reg_pair = reg_pairs[reg_pos];
4093 oop* buffer = callerFrame.oopmapreg_to_oop_location(reg_pair.first(), ®_map2);
4094 instanceHandle h_buffer(THREAD, (instanceOop)*buffer);
4095 InlineKlass* vk = InlineKlass::cast(holder);
4096 if (h_buffer.not_null()) {
4097 assert(h_buffer->klass() == vk, "buffer not of expected class");
4098 } else {
4099 // Only allocate if buffer passed at the call is null
4100 if (array_oop == nullptr) {
4101 array_oop = oopFactory::new_objectArray(nb_slots, CHECK_NULL);
4102 array = objArrayHandle(THREAD, array_oop);
4103 }
4104 oop res = vk->allocate_instance(CHECK_NULL);
4105 array->obj_at_put(i, res);
4106 }
4107 i++;
4108 }
4109 for (SignatureStream ss(callee->signature()); !ss.at_return_type(); ss.next()) {
4110 BasicType bt = ss.type();
4111 if (bt == T_OBJECT && callee->is_scalarized_arg(arg_num)) {
4112 while (true) {
4113 BasicType bt = sig->at(pos)._bt;
4114 if (bt == T_METADATA) {
4115 depth++;
4116 ignored++;
4117 if (depth == 1) {
4118 break;
4119 }
4120 } else if (bt == T_VOID && sig->at(pos - 1)._bt != T_LONG && sig->at(pos - 1)._bt != T_DOUBLE) {
4121 ignored++;
4122 depth--;
4123 }
4124 pos++;
4125 }
4126 pos++;
4127 assert(sig->at(pos)._bt == T_OBJECT, "buffer argument expected");
4128 uint reg_pos = pos - ignored;
4129 assert(reg_pos < (uint)arg_size, "out of bound register?");
4130 VMRegPair reg_pair = reg_pairs[reg_pos];
4131 oop* buffer = callerFrame.oopmapreg_to_oop_location(reg_pair.first(), ®_map2);
4132 instanceHandle h_buffer(THREAD, (instanceOop)*buffer);
4133 InlineKlass* vk = ss.as_inline_klass(holder);
4134 assert(vk != nullptr, "Unexpected klass");
4135 if (h_buffer.not_null()) {
4136 assert(h_buffer->klass() == vk, "buffer not of expected class");
4137 } else {
4138 // Only allocate if buffer passed at the call is null
4139 if (array_oop == nullptr) {
4140 array_oop = oopFactory::new_objectArray(nb_slots, CHECK_NULL);
4141 array = objArrayHandle(THREAD, array_oop);
4142 }
4143 oop res = vk->allocate_instance(CHECK_NULL);
4144 array->obj_at_put(i, res);
4145 }
4146 i++;
4147 }
4148 if (bt != T_VOID) {
4149 arg_num++;
4150 }
4151 }
4152 return array();
4153 }
4154
4155 JRT_ENTRY(void, SharedRuntime::allocate_inline_types(JavaThread* current, Method* callee_method, bool allocate_receiver))
4156 methodHandle callee(current, callee_method);
4157 oop array = SharedRuntime::allocate_inline_types_impl(current, callee, allocate_receiver, false, CHECK);
4158 current->set_vm_result_oop(array);
4159 JRT_END
4160
4161 // We've returned to an interpreted method, the interpreter needs a
4162 // reference to an inline type instance. Allocate it and initialize it
4163 // from field's values in registers.
4164 JRT_BLOCK_ENTRY(void, SharedRuntime::store_inline_type_fields_to_buf(JavaThread* current, intptr_t res))
4165 {
4166 if (!is_set_nth_bit(res, 0)) {
4167 // We're not returning with inline type fields in registers (the
4168 // calling convention didn't allow it for this inline klass)
4169 assert(!Metaspace::contains((void*)res), "should be oop or pointer in buffer area");
4170 current->set_vm_result_oop((oopDesc*)res);
4171 current->set_vm_result_metadata(nullptr);
4172 return;
4173 }
4174
4175 clear_nth_bit(res, 0);
4176 InlineKlass* vk = (InlineKlass*)res;
4177 assert(Metaspace::contains((void*)res), "should be klass");
4178
4179 if (!vk->contains_oops()) {
4180 // No oop fields. Initialize the fields by calling the pack handler from
4181 // the stub which is much faster (see 'generate_return_value_stub').
4182 // Signal this by setting the metadata result to the value klass.
4183 JRT_BLOCK;
4184 {
4185 oop vt = vk->allocate_instance(CHECK);
4186 current->set_vm_result_oop(vt);
4187 current->set_vm_result_metadata(vk);
4188 }
4189 JRT_BLOCK_END;
4190 return;
4191 }
4192
4193 ResourceMark rm;
4194 RegisterMap reg_map(current,
4195 RegisterMap::UpdateMap::include,
4196 RegisterMap::ProcessFrames::include,
4197 RegisterMap::WalkContinuation::skip);
4198 frame stubFrame = current->last_frame();
4199 stubFrame.sender(®_map);
4200
4201 assert(vk == InlineKlass::returned_inline_klass(reg_map), "broken calling convention");
4202
4203 // Allocate handles for every oop field so they are safe in case of
4204 // a safepoint when allocating
4205 GrowableArray<Handle> handles;
4206 vk->save_oop_fields(reg_map, handles);
4207
4208 // It's unsafe to safepoint until we are here
4209 JRT_BLOCK;
4210 {
4211 oop vt = vk->realloc_result(reg_map, handles, CHECK);
4212 current->set_vm_result_oop(vt);
4213 current->set_vm_result_metadata(nullptr);
4214 }
4215 JRT_BLOCK_END;
4216 }
4217 JRT_END
|