28 #include "classfile/javaClasses.inline.hpp"
29 #include "classfile/stringTable.hpp"
30 #include "classfile/vmClasses.hpp"
31 #include "classfile/vmSymbols.hpp"
32 #include "code/aotCodeCache.hpp"
33 #include "code/codeCache.hpp"
34 #include "code/compiledIC.hpp"
35 #include "code/nmethod.inline.hpp"
36 #include "code/scopeDesc.hpp"
37 #include "code/vtableStubs.hpp"
38 #include "compiler/abstractCompiler.hpp"
39 #include "compiler/compileBroker.hpp"
40 #include "compiler/disassembler.hpp"
41 #include "gc/shared/barrierSet.hpp"
42 #include "gc/shared/collectedHeap.hpp"
43 #include "interpreter/interpreter.hpp"
44 #include "interpreter/interpreterRuntime.hpp"
45 #include "jfr/jfrEvents.hpp"
46 #include "jvm.h"
47 #include "logging/log.hpp"
48 #include "memory/resourceArea.hpp"
49 #include "memory/universe.hpp"
50 #include "metaprogramming/primitiveConversions.hpp"
51 #include "oops/klass.hpp"
52 #include "oops/method.inline.hpp"
53 #include "oops/objArrayKlass.hpp"
54 #include "oops/oop.inline.hpp"
55 #include "prims/forte.hpp"
56 #include "prims/jvmtiExport.hpp"
57 #include "prims/jvmtiThreadState.hpp"
58 #include "prims/methodHandles.hpp"
59 #include "prims/nativeLookup.hpp"
60 #include "runtime/arguments.hpp"
61 #include "runtime/atomicAccess.hpp"
62 #include "runtime/basicLock.inline.hpp"
63 #include "runtime/frame.inline.hpp"
64 #include "runtime/handles.inline.hpp"
65 #include "runtime/init.hpp"
66 #include "runtime/interfaceSupport.inline.hpp"
67 #include "runtime/java.hpp"
68 #include "runtime/javaCalls.hpp"
69 #include "runtime/jniHandles.inline.hpp"
70 #include "runtime/osThread.hpp"
71 #include "runtime/perfData.hpp"
72 #include "runtime/sharedRuntime.hpp"
73 #include "runtime/stackWatermarkSet.hpp"
74 #include "runtime/stubRoutines.hpp"
75 #include "runtime/synchronizer.hpp"
76 #include "runtime/timerTrace.hpp"
77 #include "runtime/vframe.inline.hpp"
78 #include "runtime/vframeArray.hpp"
79 #include "runtime/vm_version.hpp"
80 #include "utilities/copy.hpp"
81 #include "utilities/dtrace.hpp"
82 #include "utilities/events.hpp"
83 #include "utilities/globalDefinitions.hpp"
84 #include "utilities/hashTable.hpp"
85 #include "utilities/macros.hpp"
86 #include "utilities/xmlstream.hpp"
87 #ifdef COMPILER1
88 #include "c1/c1_Runtime1.hpp"
89 #endif
90 #ifdef COMPILER2
91 #include "opto/runtime.hpp"
92 #endif
1210 // for a call current in progress, i.e., arguments has been pushed on stack
1211 // but callee has not been invoked yet. Caller frame must be compiled.
1212 Handle SharedRuntime::find_callee_info_helper(vframeStream& vfst, Bytecodes::Code& bc,
1213 CallInfo& callinfo, TRAPS) {
1214 Handle receiver;
1215 Handle nullHandle; // create a handy null handle for exception returns
1216 JavaThread* current = THREAD;
1217
1218 assert(!vfst.at_end(), "Java frame must exist");
1219
1220 // Find caller and bci from vframe
1221 methodHandle caller(current, vfst.method());
1222 int bci = vfst.bci();
1223
1224 if (caller->is_continuation_enter_intrinsic()) {
1225 bc = Bytecodes::_invokestatic;
1226 LinkResolver::resolve_continuation_enter(callinfo, CHECK_NH);
1227 return receiver;
1228 }
1229
1230 Bytecode_invoke bytecode(caller, bci);
1231 int bytecode_index = bytecode.index();
1232 bc = bytecode.invoke_code();
1233
1234 methodHandle attached_method(current, extract_attached_method(vfst));
1235 if (attached_method.not_null()) {
1236 Method* callee = bytecode.static_target(CHECK_NH);
1237 vmIntrinsics::ID id = callee->intrinsic_id();
1238 // When VM replaces MH.invokeBasic/linkTo* call with a direct/virtual call,
1239 // it attaches statically resolved method to the call site.
1240 if (MethodHandles::is_signature_polymorphic(id) &&
1241 MethodHandles::is_signature_polymorphic_intrinsic(id)) {
1242 bc = MethodHandles::signature_polymorphic_intrinsic_bytecode(id);
1243
1244 // Adjust invocation mode according to the attached method.
1245 switch (bc) {
1246 case Bytecodes::_invokevirtual:
1247 if (attached_method->method_holder()->is_interface()) {
1248 bc = Bytecodes::_invokeinterface;
1249 }
1250 break;
1251 case Bytecodes::_invokeinterface:
1252 if (!attached_method->method_holder()->is_interface()) {
1253 bc = Bytecodes::_invokevirtual;
1254 }
1255 break;
1256 case Bytecodes::_invokehandle:
1257 if (!MethodHandles::is_signature_polymorphic_method(attached_method())) {
1258 bc = attached_method->is_static() ? Bytecodes::_invokestatic
1259 : Bytecodes::_invokevirtual;
1260 }
1261 break;
1262 default:
1263 break;
1264 }
1265 }
1266 }
1267
1268 assert(bc != Bytecodes::_illegal, "not initialized");
1269
1270 bool has_receiver = bc != Bytecodes::_invokestatic &&
1271 bc != Bytecodes::_invokedynamic &&
1272 bc != Bytecodes::_invokehandle;
1273
1274 // Find receiver for non-static call
1275 if (has_receiver) {
1276 // This register map must be update since we need to find the receiver for
1277 // compiled frames. The receiver might be in a register.
1278 RegisterMap reg_map2(current,
1279 RegisterMap::UpdateMap::include,
1280 RegisterMap::ProcessFrames::include,
1281 RegisterMap::WalkContinuation::skip);
1282 frame stubFrame = current->last_frame();
1283 // Caller-frame is a compiled frame
1284 frame callerFrame = stubFrame.sender(®_map2);
1285
1286 if (attached_method.is_null()) {
1287 Method* callee = bytecode.static_target(CHECK_NH);
1288 if (callee == nullptr) {
1289 THROW_(vmSymbols::java_lang_NoSuchMethodException(), nullHandle);
1290 }
1291 }
1292
1293 // Retrieve from a compiled argument list
1294 receiver = Handle(current, callerFrame.retrieve_receiver(®_map2));
1295 assert(oopDesc::is_oop_or_null(receiver()), "");
1296
1297 if (receiver.is_null()) {
1298 THROW_(vmSymbols::java_lang_NullPointerException(), nullHandle);
1299 }
1300 }
1301
1302 // Resolve method
1303 if (attached_method.not_null()) {
1304 // Parameterized by attached method.
1305 LinkResolver::resolve_invoke(callinfo, receiver, attached_method, bc, CHECK_NH);
1306 } else {
1307 // Parameterized by bytecode.
1308 constantPoolHandle constants(current, caller->constants());
1309 LinkResolver::resolve_invoke(callinfo, receiver, constants, bytecode_index, bc, CHECK_NH);
1310 }
1311
1312 #ifdef ASSERT
1313 // Check that the receiver klass is of the right subtype and that it is initialized for virtual calls
1314 if (has_receiver) {
1315 assert(receiver.not_null(), "should have thrown exception");
1316 Klass* receiver_klass = receiver->klass();
1317 Klass* rk = nullptr;
1318 if (attached_method.not_null()) {
1319 // In case there's resolved method attached, use its holder during the check.
1320 rk = attached_method->method_holder();
1321 } else {
1322 // Klass is already loaded.
1323 constantPoolHandle constants(current, caller->constants());
1324 rk = constants->klass_ref_at(bytecode_index, bc, CHECK_NH);
1325 }
1326 Klass* static_receiver_klass = rk;
1327 assert(receiver_klass->is_subtype_of(static_receiver_klass),
1328 "actual receiver must be subclass of static receiver klass");
1329 if (receiver_klass->is_instance_klass()) {
1330 if (InstanceKlass::cast(receiver_klass)->is_not_initialized()) {
1331 tty->print_cr("ERROR: Klass not yet initialized!!");
1332 receiver_klass->print();
1333 }
1334 assert(!InstanceKlass::cast(receiver_klass)->is_not_initialized(), "receiver_klass must be initialized");
1335 }
1336 }
1337 #endif
1338
1339 return receiver;
1340 }
1341
1342 methodHandle SharedRuntime::find_callee_method(TRAPS) {
1343 JavaThread* current = THREAD;
1344 ResourceMark rm(current);
1345 // We need first to check if any Java activations (compiled, interpreted)
1346 // exist on the stack since last JavaCall. If not, we need
1347 // to get the target method from the JavaCall wrapper.
1348 vframeStream vfst(current, true); // Do not skip any javaCalls
1349 methodHandle callee_method;
1350 if (vfst.at_end()) {
1351 // No Java frames were found on stack since we did the JavaCall.
1352 // Hence the stack can only contain an entry_frame. We need to
1353 // find the target method from the stub frame.
1354 RegisterMap reg_map(current,
1355 RegisterMap::UpdateMap::skip,
1356 RegisterMap::ProcessFrames::include,
1357 RegisterMap::WalkContinuation::skip);
1358 frame fr = current->last_frame();
1359 assert(fr.is_runtime_frame(), "must be a runtimeStub");
1360 fr = fr.sender(®_map);
1361 assert(fr.is_entry_frame(), "must be");
1362 // fr is now pointing to the entry frame.
1363 callee_method = methodHandle(current, fr.entry_frame_call_wrapper()->callee_method());
1364 } else {
1365 Bytecodes::Code bc;
1366 CallInfo callinfo;
1367 find_callee_info_helper(vfst, bc, callinfo, CHECK_(methodHandle()));
1368 callee_method = methodHandle(current, callinfo.selected_method());
1369 }
1370 assert(callee_method()->is_method(), "must be");
1371 return callee_method;
1372 }
1373
1374 // Resolves a call.
1375 methodHandle SharedRuntime::resolve_helper(bool is_virtual, bool is_optimized, TRAPS) {
1376 JavaThread* current = THREAD;
1377 ResourceMark rm(current);
1378 RegisterMap cbl_map(current,
1379 RegisterMap::UpdateMap::skip,
1380 RegisterMap::ProcessFrames::include,
1381 RegisterMap::WalkContinuation::skip);
1382 frame caller_frame = current->last_frame().sender(&cbl_map);
1383
1384 CodeBlob* caller_cb = caller_frame.cb();
1385 guarantee(caller_cb != nullptr && caller_cb->is_nmethod(), "must be called from compiled method");
1386 nmethod* caller_nm = caller_cb->as_nmethod();
1387
1388 // determine call info & receiver
1389 // note: a) receiver is null for static calls
1390 // b) an exception is thrown if receiver is null for non-static calls
1391 CallInfo call_info;
1392 Bytecodes::Code invoke_code = Bytecodes::_illegal;
1393 Handle receiver = find_callee_info(invoke_code, call_info, CHECK_(methodHandle()));
1394
1395 NoSafepointVerifier nsv;
1396
1397 methodHandle callee_method(current, call_info.selected_method());
1398
1399 assert((!is_virtual && invoke_code == Bytecodes::_invokestatic ) ||
1400 (!is_virtual && invoke_code == Bytecodes::_invokespecial) ||
1401 (!is_virtual && invoke_code == Bytecodes::_invokehandle ) ||
1402 (!is_virtual && invoke_code == Bytecodes::_invokedynamic) ||
1403 ( is_virtual && invoke_code != Bytecodes::_invokestatic ), "inconsistent bytecode");
1404
1405 assert(!caller_nm->is_unloading(), "It should not be unloading");
1406
1407 #ifndef PRODUCT
1408 // tracing/debugging/statistics
1409 uint *addr = (is_optimized) ? (&_resolve_opt_virtual_ctr) :
1410 (is_virtual) ? (&_resolve_virtual_ctr) :
1411 (&_resolve_static_ctr);
1412 AtomicAccess::inc(addr);
1413
1414 if (TraceCallFixup) {
1415 ResourceMark rm(current);
1416 tty->print("resolving %s%s (%s) call to",
1417 (is_optimized) ? "optimized " : "", (is_virtual) ? "virtual" : "static",
1418 Bytecodes::name(invoke_code));
1419 callee_method->print_short_name(tty);
1420 tty->print_cr(" at pc: " INTPTR_FORMAT " to code: " INTPTR_FORMAT,
1421 p2i(caller_frame.pc()), p2i(callee_method->code()));
1422 }
1423 #endif
1424
1425 if (invoke_code == Bytecodes::_invokestatic) {
1426 assert(callee_method->method_holder()->is_initialized() ||
1427 callee_method->method_holder()->is_reentrant_initialization(current),
1428 "invalid class initialization state for invoke_static");
1429 if (!VM_Version::supports_fast_class_init_checks() && callee_method->needs_clinit_barrier()) {
1430 // In order to keep class initialization check, do not patch call
1431 // site for static call when the class is not fully initialized.
1432 // Proper check is enforced by call site re-resolution on every invocation.
1433 //
1434 // When fast class initialization checks are supported (VM_Version::supports_fast_class_init_checks() == true),
1435 // explicit class initialization check is put in nmethod entry (VEP).
1436 assert(callee_method->method_holder()->is_linked(), "must be");
1437 return callee_method;
1438 }
1439 }
1440
1441
1442 // JSR 292 key invariant:
1443 // If the resolved method is a MethodHandle invoke target, the call
1444 // site must be a MethodHandle call site, because the lambda form might tail-call
1445 // leaving the stack in a state unknown to either caller or callee
1446
1447 // Compute entry points. The computation of the entry points is independent of
1448 // patching the call.
1449
1450 // Make sure the callee nmethod does not get deoptimized and removed before
1451 // we are done patching the code.
1452
1453
1454 CompiledICLocker ml(caller_nm);
1455 if (is_virtual && !is_optimized) {
1456 CompiledIC* inline_cache = CompiledIC_before(caller_nm, caller_frame.pc());
1457 inline_cache->update(&call_info, receiver->klass());
1458 } else {
1459 // Callsite is a direct call - set it to the destination method
1460 CompiledDirectCall* callsite = CompiledDirectCall::before(caller_frame.pc());
1461 callsite->set(callee_method);
1462 }
1463
1464 return callee_method;
1465 }
1466
1467 // Inline caches exist only in compiled code
1468 JRT_BLOCK_ENTRY(address, SharedRuntime::handle_wrong_method_ic_miss(JavaThread* current))
1469 #ifdef ASSERT
1470 RegisterMap reg_map(current,
1471 RegisterMap::UpdateMap::skip,
1472 RegisterMap::ProcessFrames::include,
1473 RegisterMap::WalkContinuation::skip);
1474 frame stub_frame = current->last_frame();
1475 assert(stub_frame.is_runtime_frame(), "sanity check");
1476 frame caller_frame = stub_frame.sender(®_map);
1477 assert(!caller_frame.is_interpreted_frame() && !caller_frame.is_entry_frame() && !caller_frame.is_upcall_stub_frame(), "unexpected frame");
1478 #endif /* ASSERT */
1479
1480 methodHandle callee_method;
1481 JRT_BLOCK
1482 callee_method = SharedRuntime::handle_ic_miss_helper(CHECK_NULL);
1483 // Return Method* through TLS
1484 current->set_vm_result_metadata(callee_method());
1485 JRT_BLOCK_END
1486 // return compiled code entry point after potential safepoints
1487 return get_resolved_entry(current, callee_method);
1488 JRT_END
1489
1490
1491 // Handle call site that has been made non-entrant
1492 JRT_BLOCK_ENTRY(address, SharedRuntime::handle_wrong_method(JavaThread* current))
1493 // 6243940 We might end up in here if the callee is deoptimized
1494 // as we race to call it. We don't want to take a safepoint if
1495 // the caller was interpreted because the caller frame will look
1496 // interpreted to the stack walkers and arguments are now
1497 // "compiled" so it is much better to make this transition
1498 // invisible to the stack walking code. The i2c path will
1499 // place the callee method in the callee_target. It is stashed
1500 // there because if we try and find the callee by normal means a
1501 // safepoint is possible and have trouble gc'ing the compiled args.
1502 RegisterMap reg_map(current,
1503 RegisterMap::UpdateMap::skip,
1504 RegisterMap::ProcessFrames::include,
1505 RegisterMap::WalkContinuation::skip);
1506 frame stub_frame = current->last_frame();
1507 assert(stub_frame.is_runtime_frame(), "sanity check");
1508 frame caller_frame = stub_frame.sender(®_map);
1509
1510 if (caller_frame.is_interpreted_frame() ||
1511 caller_frame.is_entry_frame() ||
1512 caller_frame.is_upcall_stub_frame()) {
1513 Method* callee = current->callee_target();
1514 guarantee(callee != nullptr && callee->is_method(), "bad handshake");
1515 current->set_vm_result_metadata(callee);
1516 current->set_callee_target(nullptr);
1517 if (caller_frame.is_entry_frame() && VM_Version::supports_fast_class_init_checks()) {
1518 // Bypass class initialization checks in c2i when caller is in native.
1519 // JNI calls to static methods don't have class initialization checks.
1520 // Fast class initialization checks are present in c2i adapters and call into
1521 // SharedRuntime::handle_wrong_method() on the slow path.
1522 //
1523 // JVM upcalls may land here as well, but there's a proper check present in
1524 // LinkResolver::resolve_static_call (called from JavaCalls::call_static),
1525 // so bypassing it in c2i adapter is benign.
1526 return callee->get_c2i_no_clinit_check_entry();
1527 } else {
1528 return callee->get_c2i_entry();
1529 }
1530 }
1531
1532 // Must be compiled to compiled path which is safe to stackwalk
1533 methodHandle callee_method;
1534 JRT_BLOCK
1535 // Force resolving of caller (if we called from compiled frame)
1536 callee_method = SharedRuntime::reresolve_call_site(CHECK_NULL);
1537 current->set_vm_result_metadata(callee_method());
1538 JRT_BLOCK_END
1539 // return compiled code entry point after potential safepoints
1540 return get_resolved_entry(current, callee_method);
1541 JRT_END
1542
1543 // Handle abstract method call
1544 JRT_BLOCK_ENTRY(address, SharedRuntime::handle_wrong_method_abstract(JavaThread* current))
1545 // Verbose error message for AbstractMethodError.
1546 // Get the called method from the invoke bytecode.
1547 vframeStream vfst(current, true);
1548 assert(!vfst.at_end(), "Java frame must exist");
1549 methodHandle caller(current, vfst.method());
1550 Bytecode_invoke invoke(caller, vfst.bci());
1551 DEBUG_ONLY( invoke.verify(); )
1552
1553 // Find the compiled caller frame.
1554 RegisterMap reg_map(current,
1555 RegisterMap::UpdateMap::include,
1556 RegisterMap::ProcessFrames::include,
1557 RegisterMap::WalkContinuation::skip);
1558 frame stubFrame = current->last_frame();
1559 assert(stubFrame.is_runtime_frame(), "must be");
1560 frame callerFrame = stubFrame.sender(®_map);
1561 assert(callerFrame.is_compiled_frame(), "must be");
1562
1563 // Install exception and return forward entry.
1564 address res = SharedRuntime::throw_AbstractMethodError_entry();
1565 JRT_BLOCK
1566 methodHandle callee(current, invoke.static_target(current));
1567 if (!callee.is_null()) {
1568 oop recv = callerFrame.retrieve_receiver(®_map);
1569 Klass *recv_klass = (recv != nullptr) ? recv->klass() : nullptr;
1570 res = StubRoutines::forward_exception_entry();
1571 LinkResolver::throw_abstract_method_error(callee, recv_klass, CHECK_(res));
1572 }
1573 JRT_BLOCK_END
1574 return res;
1575 JRT_END
1576
1577 // return verified_code_entry if interp_only_mode is not set for the current thread;
1578 // otherwise return c2i entry.
1579 address SharedRuntime::get_resolved_entry(JavaThread* current, methodHandle callee_method) {
1580 if (current->is_interp_only_mode() && !callee_method->is_special_native_intrinsic()) {
1581 // In interp_only_mode we need to go to the interpreted entry
1582 // The c2i won't patch in this mode -- see fixup_callers_callsite
1583 return callee_method->get_c2i_entry();
1584 }
1585 assert(callee_method->verified_code_entry() != nullptr, " Jump to zero!");
1586 return callee_method->verified_code_entry();
1587 }
1588
1589 // resolve a static call and patch code
1590 JRT_BLOCK_ENTRY(address, SharedRuntime::resolve_static_call_C(JavaThread* current ))
1591 methodHandle callee_method;
1592 bool enter_special = false;
1593 JRT_BLOCK
1594 callee_method = SharedRuntime::resolve_helper(false, false, CHECK_NULL);
1595 current->set_vm_result_metadata(callee_method());
1596 JRT_BLOCK_END
1597 // return compiled code entry point after potential safepoints
1598 return get_resolved_entry(current, callee_method);
1599 JRT_END
1600
1601 // resolve virtual call and update inline cache to monomorphic
1602 JRT_BLOCK_ENTRY(address, SharedRuntime::resolve_virtual_call_C(JavaThread* current))
1603 methodHandle callee_method;
1604 JRT_BLOCK
1605 callee_method = SharedRuntime::resolve_helper(true, false, CHECK_NULL);
1606 current->set_vm_result_metadata(callee_method());
1607 JRT_BLOCK_END
1608 // return compiled code entry point after potential safepoints
1609 return get_resolved_entry(current, callee_method);
1610 JRT_END
1611
1612
1613 // Resolve a virtual call that can be statically bound (e.g., always
1614 // monomorphic, so it has no inline cache). Patch code to resolved target.
1615 JRT_BLOCK_ENTRY(address, SharedRuntime::resolve_opt_virtual_call_C(JavaThread* current))
1616 methodHandle callee_method;
1617 JRT_BLOCK
1618 callee_method = SharedRuntime::resolve_helper(true, true, CHECK_NULL);
1619 current->set_vm_result_metadata(callee_method());
1620 JRT_BLOCK_END
1621 // return compiled code entry point after potential safepoints
1622 return get_resolved_entry(current, callee_method);
1623 JRT_END
1624
1625 methodHandle SharedRuntime::handle_ic_miss_helper(TRAPS) {
1626 JavaThread* current = THREAD;
1627 ResourceMark rm(current);
1628 CallInfo call_info;
1629 Bytecodes::Code bc;
1630
1631 // receiver is null for static calls. An exception is thrown for null
1632 // receivers for non-static calls
1633 Handle receiver = find_callee_info(bc, call_info, CHECK_(methodHandle()));
1634
1635 methodHandle callee_method(current, call_info.selected_method());
1636
1637 #ifndef PRODUCT
1638 AtomicAccess::inc(&_ic_miss_ctr);
1639
1640 // Statistics & Tracing
1641 if (TraceCallFixup) {
1642 ResourceMark rm(current);
1643 tty->print("IC miss (%s) call to", Bytecodes::name(bc));
1644 callee_method->print_short_name(tty);
1645 tty->print_cr(" code: " INTPTR_FORMAT, p2i(callee_method->code()));
1646 }
1647
1648 if (ICMissHistogram) {
1649 MutexLocker m(VMStatistic_lock);
1650 RegisterMap reg_map(current,
1651 RegisterMap::UpdateMap::skip,
1652 RegisterMap::ProcessFrames::include,
1653 RegisterMap::WalkContinuation::skip);
1654 frame f = current->last_frame().real_sender(®_map);// skip runtime stub
1655 // produce statistics under the lock
1656 trace_ic_miss(f.pc());
1657 }
1658 #endif
1659
1660 // install an event collector so that when a vtable stub is created the
1661 // profiler can be notified via a DYNAMIC_CODE_GENERATED event. The
1662 // event can't be posted when the stub is created as locks are held
1663 // - instead the event will be deferred until the event collector goes
1664 // out of scope.
1665 JvmtiDynamicCodeEventCollector event_collector;
1666
1667 // Update inline cache to megamorphic. Skip update if we are called from interpreted.
1668 RegisterMap reg_map(current,
1669 RegisterMap::UpdateMap::skip,
1670 RegisterMap::ProcessFrames::include,
1671 RegisterMap::WalkContinuation::skip);
1672 frame caller_frame = current->last_frame().sender(®_map);
1673 CodeBlob* cb = caller_frame.cb();
1674 nmethod* caller_nm = cb->as_nmethod();
1675
1676 CompiledICLocker ml(caller_nm);
1677 CompiledIC* inline_cache = CompiledIC_before(caller_nm, caller_frame.pc());
1678 inline_cache->update(&call_info, receiver()->klass());
1679
1680 return callee_method;
1681 }
1682
1683 //
1684 // Resets a call-site in compiled code so it will get resolved again.
1685 // This routines handles both virtual call sites, optimized virtual call
1686 // sites, and static call sites. Typically used to change a call sites
1687 // destination from compiled to interpreted.
1688 //
1689 methodHandle SharedRuntime::reresolve_call_site(TRAPS) {
1690 JavaThread* current = THREAD;
1691 ResourceMark rm(current);
1692 RegisterMap reg_map(current,
1693 RegisterMap::UpdateMap::skip,
1694 RegisterMap::ProcessFrames::include,
1695 RegisterMap::WalkContinuation::skip);
1696 frame stub_frame = current->last_frame();
1697 assert(stub_frame.is_runtime_frame(), "must be a runtimeStub");
1698 frame caller = stub_frame.sender(®_map);
1699
1700 // Do nothing if the frame isn't a live compiled frame.
1701 // nmethod could be deoptimized by the time we get here
1702 // so no update to the caller is needed.
1703
1704 if ((caller.is_compiled_frame() && !caller.is_deoptimized_frame()) ||
1705 (caller.is_native_frame() && caller.cb()->as_nmethod()->method()->is_continuation_enter_intrinsic())) {
1706
1707 address pc = caller.pc();
1708
1709 nmethod* caller_nm = CodeCache::find_nmethod(pc);
1710 assert(caller_nm != nullptr, "did not find caller nmethod");
1711
1712 // Default call_addr is the location of the "basic" call.
1713 // Determine the address of the call we a reresolving. With
1714 // Inline Caches we will always find a recognizable call.
1715 // With Inline Caches disabled we may or may not find a
1716 // recognizable call. We will always find a call for static
1717 // calls and for optimized virtual calls. For vanilla virtual
1718 // calls it depends on the state of the UseInlineCaches switch.
1719 //
1720 // With Inline Caches disabled we can get here for a virtual call
1721 // for two reasons:
1722 // 1 - calling an abstract method. The vtable for abstract methods
1723 // will run us thru handle_wrong_method and we will eventually
1724 // end up in the interpreter to throw the ame.
1725 // 2 - a racing deoptimization. We could be doing a vanilla vtable
1726 // call and between the time we fetch the entry address and
1727 // we jump to it the target gets deoptimized. Similar to 1
1728 // we will wind up in the interprter (thru a c2i with c2).
1729 //
1730 CompiledICLocker ml(caller_nm);
1731 address call_addr = caller_nm->call_instruction_address(pc);
1732
1733 if (call_addr != nullptr) {
1734 // On x86 the logic for finding a call instruction is blindly checking for a call opcode 5
1735 // bytes back in the instruction stream so we must also check for reloc info.
1736 RelocIterator iter(caller_nm, call_addr, call_addr+1);
1737 bool ret = iter.next(); // Get item
1738 if (ret) {
1739 switch (iter.type()) {
1740 case relocInfo::static_call_type:
1741 case relocInfo::opt_virtual_call_type: {
1742 CompiledDirectCall* cdc = CompiledDirectCall::at(call_addr);
1743 cdc->set_to_clean();
1744 break;
1745 }
1746
1747 case relocInfo::virtual_call_type: {
1748 // compiled, dispatched call (which used to call an interpreted method)
1749 CompiledIC* inline_cache = CompiledIC_at(caller_nm, call_addr);
1750 inline_cache->set_to_clean();
1751 break;
1752 }
1753 default:
1754 break;
1755 }
1756 }
1757 }
1758 }
1759
1760 methodHandle callee_method = find_callee_method(CHECK_(methodHandle()));
1761
1762
1763 #ifndef PRODUCT
1764 AtomicAccess::inc(&_wrong_method_ctr);
1765
1766 if (TraceCallFixup) {
1767 ResourceMark rm(current);
1768 tty->print("handle_wrong_method reresolving call to");
1769 callee_method->print_short_name(tty);
1770 tty->print_cr(" code: " INTPTR_FORMAT, p2i(callee_method->code()));
1771 }
1772 #endif
1773
1774 return callee_method;
1775 }
1776
1777 address SharedRuntime::handle_unsafe_access(JavaThread* thread, address next_pc) {
1778 // The faulting unsafe accesses should be changed to throw the error
1779 // synchronously instead. Meanwhile the faulting instruction will be
1780 // skipped over (effectively turning it into a no-op) and an
1781 // asynchronous exception will be raised which the thread will
1782 // handle at a later point. If the instruction is a load it will
1783 // return garbage.
1784
1785 // Request an async exception.
1786 thread->set_pending_unsafe_access_error();
1787
1788 // Return address of next instruction to execute.
1954 msglen += strlen(caster_klass_description) + strlen(target_klass_description) + strlen(klass_separator) + 3;
1955
1956 char* message = NEW_RESOURCE_ARRAY_RETURN_NULL(char, msglen);
1957 if (message == nullptr) {
1958 // Shouldn't happen, but don't cause even more problems if it does
1959 message = const_cast<char*>(caster_klass->external_name());
1960 } else {
1961 jio_snprintf(message,
1962 msglen,
1963 "class %s cannot be cast to class %s (%s%s%s)",
1964 caster_name,
1965 target_name,
1966 caster_klass_description,
1967 klass_separator,
1968 target_klass_description
1969 );
1970 }
1971 return message;
1972 }
1973
1974 JRT_LEAF(void, SharedRuntime::reguard_yellow_pages())
1975 (void) JavaThread::current()->stack_overflow_state()->reguard_stack();
1976 JRT_END
1977
1978 void SharedRuntime::monitor_enter_helper(oopDesc* obj, BasicLock* lock, JavaThread* current) {
1979 if (!SafepointSynchronize::is_synchronizing()) {
1980 // Only try quick_enter() if we're not trying to reach a safepoint
1981 // so that the calling thread reaches the safepoint more quickly.
1982 if (ObjectSynchronizer::quick_enter(obj, lock, current)) {
1983 return;
1984 }
1985 }
1986 // NO_ASYNC required because an async exception on the state transition destructor
1987 // would leave you with the lock held and it would never be released.
1988 // The normal monitorenter NullPointerException is thrown without acquiring a lock
1989 // and the model is that an exception implies the method failed.
1990 JRT_BLOCK_NO_ASYNC
1991 Handle h_obj(THREAD, obj);
1992 ObjectSynchronizer::enter(h_obj, lock, current);
1993 assert(!HAS_PENDING_EXCEPTION, "Should have no exception here");
2187 tty->print_cr("Note 1: counter updates are not MT-safe.");
2188 tty->print_cr("Note 2: %% in major categories are relative to total non-inlined calls;");
2189 tty->print_cr(" %% in nested categories are relative to their category");
2190 tty->print_cr(" (and thus add up to more than 100%% with inlining)");
2191 tty->cr();
2192
2193 MethodArityHistogram h;
2194 }
2195 #endif
2196
2197 #ifndef PRODUCT
2198 static int _lookups; // number of calls to lookup
2199 static int _equals; // number of buckets checked with matching hash
2200 static int _archived_hits; // number of successful lookups in archived table
2201 static int _runtime_hits; // number of successful lookups in runtime table
2202 #endif
2203
2204 // A simple wrapper class around the calling convention information
2205 // that allows sharing of adapters for the same calling convention.
2206 class AdapterFingerPrint : public MetaspaceObj {
2207 private:
2208 enum {
2209 _basic_type_bits = 4,
2210 _basic_type_mask = right_n_bits(_basic_type_bits),
2211 _basic_types_per_int = BitsPerInt / _basic_type_bits,
2212 };
2213 // TO DO: Consider integrating this with a more global scheme for compressing signatures.
2214 // For now, 4 bits per components (plus T_VOID gaps after double/long) is not excessive.
2215
2216 int _length;
2217
2218 static int data_offset() { return sizeof(AdapterFingerPrint); }
2219 int* data_pointer() {
2220 return (int*)((address)this + data_offset());
2221 }
2222
2223 // Private construtor. Use allocate() to get an instance.
2224 AdapterFingerPrint(int total_args_passed, BasicType* sig_bt, int len) {
2225 int* data = data_pointer();
2226 // Pack the BasicTypes with 8 per int
2227 assert(len == length(total_args_passed), "sanity");
2228 _length = len;
2229 int sig_index = 0;
2230 for (int index = 0; index < _length; index++) {
2231 int value = 0;
2232 for (int byte = 0; sig_index < total_args_passed && byte < _basic_types_per_int; byte++) {
2233 int bt = adapter_encoding(sig_bt[sig_index++]);
2234 assert((bt & _basic_type_mask) == bt, "must fit in 4 bits");
2235 value = (value << _basic_type_bits) | bt;
2236 }
2237 data[index] = value;
2238 }
2239 }
2240
2241 // Call deallocate instead
2242 ~AdapterFingerPrint() {
2243 ShouldNotCallThis();
2244 }
2245
2246 static int length(int total_args) {
2247 return (total_args + (_basic_types_per_int-1)) / _basic_types_per_int;
2248 }
2249
2250 static int compute_size_in_words(int len) {
2251 return (int)heap_word_size(sizeof(AdapterFingerPrint) + (len * sizeof(int)));
2252 }
2253
2254 // Remap BasicTypes that are handled equivalently by the adapters.
2255 // These are correct for the current system but someday it might be
2256 // necessary to make this mapping platform dependent.
2257 static int adapter_encoding(BasicType in) {
2258 switch (in) {
2259 case T_BOOLEAN:
2260 case T_BYTE:
2261 case T_SHORT:
2262 case T_CHAR:
2263 // There are all promoted to T_INT in the calling convention
2264 return T_INT;
2265
2266 case T_OBJECT:
2267 case T_ARRAY:
2268 // In other words, we assume that any register good enough for
2269 // an int or long is good enough for a managed pointer.
2270 #ifdef _LP64
2271 return T_LONG;
2272 #else
2273 return T_INT;
2274 #endif
2275
2276 case T_INT:
2277 case T_LONG:
2278 case T_FLOAT:
2279 case T_DOUBLE:
2280 case T_VOID:
2281 return in;
2282
2283 default:
2284 ShouldNotReachHere();
2285 return T_CONFLICT;
2286 }
2287 }
2288
2289 void* operator new(size_t size, size_t fp_size) throw() {
2290 assert(fp_size >= size, "sanity check");
2291 void* p = AllocateHeap(fp_size, mtCode);
2292 memset(p, 0, fp_size);
2293 return p;
2294 }
2295
2296 template<typename Function>
2297 void iterate_args(Function function) {
2298 for (int i = 0; i < length(); i++) {
2299 unsigned val = (unsigned)value(i);
2300 // args are packed so that first/lower arguments are in the highest
2301 // bits of each int value, so iterate from highest to the lowest
2302 for (int j = 32 - _basic_type_bits; j >= 0; j -= _basic_type_bits) {
2303 unsigned v = (val >> j) & _basic_type_mask;
2304 if (v == 0) {
2305 continue;
2306 }
2307 function(v);
2308 }
2309 }
2310 }
2311
2312 public:
2313 static AdapterFingerPrint* allocate(int total_args_passed, BasicType* sig_bt) {
2314 int len = length(total_args_passed);
2315 int size_in_bytes = BytesPerWord * compute_size_in_words(len);
2316 AdapterFingerPrint* afp = new (size_in_bytes) AdapterFingerPrint(total_args_passed, sig_bt, len);
2317 assert((afp->size() * BytesPerWord) == size_in_bytes, "should match");
2318 return afp;
2319 }
2320
2321 static void deallocate(AdapterFingerPrint* fp) {
2322 FreeHeap(fp);
2323 }
2324
2325 int value(int index) {
2326 int* data = data_pointer();
2327 return data[index];
2328 }
2329
2330 int length() {
2331 return _length;
2332 }
2333
2334 unsigned int compute_hash() {
2335 int hash = 0;
2336 for (int i = 0; i < length(); i++) {
2337 int v = value(i);
2338 //Add arithmetic operation to the hash, like +3 to improve hashing
2339 hash = ((hash << 8) ^ v ^ (hash >> 5)) + 3;
2340 }
2341 return (unsigned int)hash;
2342 }
2343
2344 const char* as_string() {
2345 stringStream st;
2346 st.print("0x");
2347 for (int i = 0; i < length(); i++) {
2348 st.print("%x", value(i));
2349 }
2350 return st.as_string();
2351 }
2352
2353 const char* as_basic_args_string() {
2354 stringStream st;
2355 bool long_prev = false;
2356 iterate_args([&] (int arg) {
2357 if (long_prev) {
2358 long_prev = false;
2359 if (arg == T_VOID) {
2360 st.print("J");
2361 } else {
2362 st.print("L");
2363 }
2364 }
2365 switch (arg) {
2366 case T_INT: st.print("I"); break;
2367 case T_LONG: long_prev = true; break;
2368 case T_FLOAT: st.print("F"); break;
2369 case T_DOUBLE: st.print("D"); break;
2370 case T_VOID: break;
2371 default: ShouldNotReachHere();
2372 }
2373 });
2374 if (long_prev) {
2375 st.print("L");
2376 }
2377 return st.as_string();
2378 }
2379
2380 BasicType* as_basic_type(int& nargs) {
2381 nargs = 0;
2382 GrowableArray<BasicType> btarray;
2383 bool long_prev = false;
2384
2385 iterate_args([&] (int arg) {
2386 if (long_prev) {
2387 long_prev = false;
2388 if (arg == T_VOID) {
2389 btarray.append(T_LONG);
2390 } else {
2391 btarray.append(T_OBJECT); // it could be T_ARRAY; it shouldn't matter
2392 }
2393 }
2394 switch (arg) {
2395 case T_INT: // fallthrough
2396 case T_FLOAT: // fallthrough
2397 case T_DOUBLE:
2398 case T_VOID:
2399 btarray.append((BasicType)arg);
2400 break;
2401 case T_LONG:
2402 long_prev = true;
2403 break;
2404 default: ShouldNotReachHere();
2405 }
2406 });
2407
2408 if (long_prev) {
2409 btarray.append(T_OBJECT);
2410 }
2411
2412 nargs = btarray.length();
2413 BasicType* sig_bt = NEW_RESOURCE_ARRAY(BasicType, nargs);
2414 int index = 0;
2415 GrowableArrayIterator<BasicType> iter = btarray.begin();
2416 while (iter != btarray.end()) {
2417 sig_bt[index++] = *iter;
2418 ++iter;
2419 }
2420 assert(index == btarray.length(), "sanity check");
2421 #ifdef ASSERT
2422 {
2423 AdapterFingerPrint* compare_fp = AdapterFingerPrint::allocate(nargs, sig_bt);
2424 assert(this->equals(compare_fp), "sanity check");
2425 AdapterFingerPrint::deallocate(compare_fp);
2426 }
2427 #endif
2428 return sig_bt;
2429 }
2430
2431 bool equals(AdapterFingerPrint* other) {
2432 if (other->_length != _length) {
2433 return false;
2434 } else {
2435 for (int i = 0; i < _length; i++) {
2436 if (value(i) != other->value(i)) {
2437 return false;
2438 }
2439 }
2440 }
2441 return true;
2442 }
2443
2444 // methods required by virtue of being a MetaspaceObj
2445 void metaspace_pointers_do(MetaspaceClosure* it) { return; /* nothing to do here */ }
2446 int size() const { return compute_size_in_words(_length); }
2447 MetaspaceObj::Type type() const { return AdapterFingerPrintType; }
2448
2449 static bool equals(AdapterFingerPrint* const& fp1, AdapterFingerPrint* const& fp2) {
2450 NOT_PRODUCT(_equals++);
2451 return fp1->equals(fp2);
2452 }
2453
2454 static unsigned int compute_hash(AdapterFingerPrint* const& fp) {
2455 return fp->compute_hash();
2456 }
2459 #if INCLUDE_CDS
2460 static inline bool adapter_fp_equals_compact_hashtable_entry(AdapterHandlerEntry* entry, AdapterFingerPrint* fp, int len_unused) {
2461 return AdapterFingerPrint::equals(entry->fingerprint(), fp);
2462 }
2463
2464 class ArchivedAdapterTable : public OffsetCompactHashtable<
2465 AdapterFingerPrint*,
2466 AdapterHandlerEntry*,
2467 adapter_fp_equals_compact_hashtable_entry> {};
2468 #endif // INCLUDE_CDS
2469
2470 // A hashtable mapping from AdapterFingerPrints to AdapterHandlerEntries
2471 using AdapterHandlerTable = HashTable<AdapterFingerPrint*, AdapterHandlerEntry*, 293,
2472 AnyObj::C_HEAP, mtCode,
2473 AdapterFingerPrint::compute_hash,
2474 AdapterFingerPrint::equals>;
2475 static AdapterHandlerTable* _adapter_handler_table;
2476 static GrowableArray<AdapterHandlerEntry*>* _adapter_handler_list = nullptr;
2477
2478 // Find a entry with the same fingerprint if it exists
2479 AdapterHandlerEntry* AdapterHandlerLibrary::lookup(int total_args_passed, BasicType* sig_bt) {
2480 NOT_PRODUCT(_lookups++);
2481 assert_lock_strong(AdapterHandlerLibrary_lock);
2482 AdapterFingerPrint* fp = AdapterFingerPrint::allocate(total_args_passed, sig_bt);
2483 AdapterHandlerEntry* entry = nullptr;
2484 #if INCLUDE_CDS
2485 // if we are building the archive then the archived adapter table is
2486 // not valid and we need to use the ones added to the runtime table
2487 if (AOTCodeCache::is_using_adapter()) {
2488 // Search archived table first. It is read-only table so can be searched without lock
2489 entry = _aot_adapter_handler_table.lookup(fp, fp->compute_hash(), 0 /* unused */);
2490 #ifndef PRODUCT
2491 if (entry != nullptr) {
2492 _archived_hits++;
2493 }
2494 #endif
2495 }
2496 #endif // INCLUDE_CDS
2497 if (entry == nullptr) {
2498 assert_lock_strong(AdapterHandlerLibrary_lock);
2499 AdapterHandlerEntry** entry_p = _adapter_handler_table->get(fp);
2500 if (entry_p != nullptr) {
2501 entry = *entry_p;
2502 assert(entry->fingerprint()->equals(fp), "fingerprint mismatch key fp %s %s (hash=%d) != found fp %s %s (hash=%d)",
2519 TableStatistics ts = _adapter_handler_table->statistics_calculate(size);
2520 ts.print(tty, "AdapterHandlerTable");
2521 tty->print_cr("AdapterHandlerTable (table_size=%d, entries=%d)",
2522 _adapter_handler_table->table_size(), _adapter_handler_table->number_of_entries());
2523 int total_hits = _archived_hits + _runtime_hits;
2524 tty->print_cr("AdapterHandlerTable: lookups %d equals %d hits %d (archived=%d+runtime=%d)",
2525 _lookups, _equals, total_hits, _archived_hits, _runtime_hits);
2526 }
2527 #endif
2528
2529 // ---------------------------------------------------------------------------
2530 // Implementation of AdapterHandlerLibrary
2531 AdapterHandlerEntry* AdapterHandlerLibrary::_no_arg_handler = nullptr;
2532 AdapterHandlerEntry* AdapterHandlerLibrary::_int_arg_handler = nullptr;
2533 AdapterHandlerEntry* AdapterHandlerLibrary::_obj_arg_handler = nullptr;
2534 AdapterHandlerEntry* AdapterHandlerLibrary::_obj_int_arg_handler = nullptr;
2535 AdapterHandlerEntry* AdapterHandlerLibrary::_obj_obj_arg_handler = nullptr;
2536 #if INCLUDE_CDS
2537 ArchivedAdapterTable AdapterHandlerLibrary::_aot_adapter_handler_table;
2538 #endif // INCLUDE_CDS
2539 static const int AdapterHandlerLibrary_size = 16*K;
2540 BufferBlob* AdapterHandlerLibrary::_buffer = nullptr;
2541 volatile uint AdapterHandlerLibrary::_id_counter = 0;
2542
2543 BufferBlob* AdapterHandlerLibrary::buffer_blob() {
2544 assert(_buffer != nullptr, "should be initialized");
2545 return _buffer;
2546 }
2547
2548 static void post_adapter_creation(const AdapterHandlerEntry* entry) {
2549 if (Forte::is_enabled() || JvmtiExport::should_post_dynamic_code_generated()) {
2550 AdapterBlob* adapter_blob = entry->adapter_blob();
2551 char blob_id[256];
2552 jio_snprintf(blob_id,
2553 sizeof(blob_id),
2554 "%s(%s)",
2555 adapter_blob->name(),
2556 entry->fingerprint()->as_string());
2557 if (Forte::is_enabled()) {
2558 Forte::register_stub(blob_id, adapter_blob->content_begin(), adapter_blob->content_end());
2559 }
2567 void AdapterHandlerLibrary::initialize() {
2568 {
2569 ResourceMark rm;
2570 _adapter_handler_table = new (mtCode) AdapterHandlerTable();
2571 _buffer = BufferBlob::create("adapters", AdapterHandlerLibrary_size);
2572 }
2573
2574 #if INCLUDE_CDS
2575 // Link adapters in AOT Cache to their code in AOT Code Cache
2576 if (AOTCodeCache::is_using_adapter() && !_aot_adapter_handler_table.empty()) {
2577 link_aot_adapters();
2578 lookup_simple_adapters();
2579 return;
2580 }
2581 #endif // INCLUDE_CDS
2582
2583 ResourceMark rm;
2584 {
2585 MutexLocker mu(AdapterHandlerLibrary_lock);
2586
2587 _no_arg_handler = create_adapter(0, nullptr);
2588
2589 BasicType obj_args[] = { T_OBJECT };
2590 _obj_arg_handler = create_adapter(1, obj_args);
2591
2592 BasicType int_args[] = { T_INT };
2593 _int_arg_handler = create_adapter(1, int_args);
2594
2595 BasicType obj_int_args[] = { T_OBJECT, T_INT };
2596 _obj_int_arg_handler = create_adapter(2, obj_int_args);
2597
2598 BasicType obj_obj_args[] = { T_OBJECT, T_OBJECT };
2599 _obj_obj_arg_handler = create_adapter(2, obj_obj_args);
2600
2601 // we should always get an entry back but we don't have any
2602 // associated blob on Zero
2603 assert(_no_arg_handler != nullptr &&
2604 _obj_arg_handler != nullptr &&
2605 _int_arg_handler != nullptr &&
2606 _obj_int_arg_handler != nullptr &&
2607 _obj_obj_arg_handler != nullptr, "Initial adapter handlers must be properly created");
2608 }
2609
2610 // Outside of the lock
2611 #ifndef ZERO
2612 // no blobs to register when we are on Zero
2613 post_adapter_creation(_no_arg_handler);
2614 post_adapter_creation(_obj_arg_handler);
2615 post_adapter_creation(_int_arg_handler);
2616 post_adapter_creation(_obj_int_arg_handler);
2617 post_adapter_creation(_obj_obj_arg_handler);
2618 #endif // ZERO
2619 }
2620
2621 AdapterHandlerEntry* AdapterHandlerLibrary::new_entry(AdapterFingerPrint* fingerprint) {
2622 uint id = (uint)AtomicAccess::add((int*)&_id_counter, 1);
2623 assert(id > 0, "we can never overflow because AOT cache cannot contain more than 2^32 methods");
2624 return AdapterHandlerEntry::allocate(id, fingerprint);
2625 }
2626
2627 AdapterHandlerEntry* AdapterHandlerLibrary::get_simple_adapter(const methodHandle& method) {
2628 int total_args_passed = method->size_of_parameters(); // All args on stack
2629 if (total_args_passed == 0) {
2630 return _no_arg_handler;
2631 } else if (total_args_passed == 1) {
2632 if (!method->is_static()) {
2633 return _obj_arg_handler;
2634 }
2635 switch (method->signature()->char_at(1)) {
2636 case JVM_SIGNATURE_CLASS:
2637 case JVM_SIGNATURE_ARRAY:
2638 return _obj_arg_handler;
2639 case JVM_SIGNATURE_INT:
2640 case JVM_SIGNATURE_BOOLEAN:
2641 case JVM_SIGNATURE_CHAR:
2642 case JVM_SIGNATURE_BYTE:
2643 case JVM_SIGNATURE_SHORT:
2644 return _int_arg_handler;
2645 }
2646 } else if (total_args_passed == 2 &&
2647 !method->is_static()) {
2648 switch (method->signature()->char_at(1)) {
2649 case JVM_SIGNATURE_CLASS:
2650 case JVM_SIGNATURE_ARRAY:
2651 return _obj_obj_arg_handler;
2652 case JVM_SIGNATURE_INT:
2653 case JVM_SIGNATURE_BOOLEAN:
2654 case JVM_SIGNATURE_CHAR:
2655 case JVM_SIGNATURE_BYTE:
2656 case JVM_SIGNATURE_SHORT:
2657 return _obj_int_arg_handler;
2658 }
2659 }
2660 return nullptr;
2661 }
2662
2663 class AdapterSignatureIterator : public SignatureIterator {
2664 private:
2665 BasicType stack_sig_bt[16];
2666 BasicType* sig_bt;
2667 int index;
2668
2669 public:
2670 AdapterSignatureIterator(Symbol* signature,
2671 fingerprint_t fingerprint,
2672 bool is_static,
2673 int total_args_passed) :
2674 SignatureIterator(signature, fingerprint),
2675 index(0)
2676 {
2677 sig_bt = (total_args_passed <= 16) ? stack_sig_bt : NEW_RESOURCE_ARRAY(BasicType, total_args_passed);
2678 if (!is_static) { // Pass in receiver first
2679 sig_bt[index++] = T_OBJECT;
2680 }
2681 do_parameters_on(this);
2682 }
2683
2684 BasicType* basic_types() {
2685 return sig_bt;
2686 }
2687
2688 #ifdef ASSERT
2689 int slots() {
2690 return index;
2691 }
2692 #endif
2693
2694 private:
2695
2696 friend class SignatureIterator; // so do_parameters_on can call do_type
2697 void do_type(BasicType type) {
2698 sig_bt[index++] = type;
2699 if (type == T_LONG || type == T_DOUBLE) {
2700 sig_bt[index++] = T_VOID; // Longs & doubles take 2 Java slots
2701 }
2702 }
2703 };
2704
2705
2706 const char* AdapterHandlerEntry::_entry_names[] = {
2707 "i2c", "c2i", "c2i_unverified", "c2i_no_clinit_check"
2708 };
2709
2710 #ifdef ASSERT
2711 void AdapterHandlerLibrary::verify_adapter_sharing(int total_args_passed, BasicType* sig_bt, AdapterHandlerEntry* cached_entry) {
2712 // we can only check for the same code if there is any
2713 #ifndef ZERO
2714 AdapterHandlerEntry* comparison_entry = create_adapter(total_args_passed, sig_bt, true);
2715 assert(comparison_entry->adapter_blob() == nullptr, "no blob should be created when creating an adapter for comparison");
2716 assert(comparison_entry->compare_code(cached_entry), "code must match");
2717 // Release the one just created
2718 AdapterHandlerEntry::deallocate(comparison_entry);
2719 # endif // ZERO
2720 }
2721 #endif /* ASSERT*/
2722
2723 AdapterHandlerEntry* AdapterHandlerLibrary::get_adapter(const methodHandle& method) {
2724 assert(!method->is_abstract(), "abstract methods do not have adapters");
2725 // Use customized signature handler. Need to lock around updates to
2726 // the _adapter_handler_table (it is not safe for concurrent readers
2727 // and a single writer: this could be fixed if it becomes a
2728 // problem).
2729
2730 // Fast-path for trivial adapters
2731 AdapterHandlerEntry* entry = get_simple_adapter(method);
2732 if (entry != nullptr) {
2733 return entry;
2734 }
2735
2736 ResourceMark rm;
2737 bool new_entry = false;
2738
2739 // Fill in the signature array, for the calling-convention call.
2740 int total_args_passed = method->size_of_parameters(); // All args on stack
2741
2742 AdapterSignatureIterator si(method->signature(), method->constMethod()->fingerprint(),
2743 method->is_static(), total_args_passed);
2744 assert(si.slots() == total_args_passed, "");
2745 BasicType* sig_bt = si.basic_types();
2746 {
2747 MutexLocker mu(AdapterHandlerLibrary_lock);
2748
2749 // Lookup method signature's fingerprint
2750 entry = lookup(total_args_passed, sig_bt);
2751
2752 if (entry != nullptr) {
2753 #ifndef ZERO
2754 assert(entry->is_linked(), "AdapterHandlerEntry must have been linked");
2755 #endif
2756 #ifdef ASSERT
2757 if (!entry->in_aot_cache() && VerifyAdapterSharing) {
2758 verify_adapter_sharing(total_args_passed, sig_bt, entry);
2759 }
2760 #endif
2761 } else {
2762 entry = create_adapter(total_args_passed, sig_bt);
2763 if (entry != nullptr) {
2764 new_entry = true;
2765 }
2766 }
2767 }
2768
2769 // Outside of the lock
2770 if (new_entry) {
2771 post_adapter_creation(entry);
2772 }
2773 return entry;
2774 }
2775
2776 void AdapterHandlerLibrary::lookup_aot_cache(AdapterHandlerEntry* handler) {
2777 ResourceMark rm;
2778 const char* name = AdapterHandlerLibrary::name(handler);
2779 const uint32_t id = AdapterHandlerLibrary::id(handler);
2780
2781 CodeBlob* blob = AOTCodeCache::load_code_blob(AOTCodeEntry::Adapter, id, name);
2782 if (blob != nullptr) {
2797 }
2798 insts_size = adapter_blob->code_size();
2799 st->print_cr("i2c argument handler for: %s %s (%d bytes generated)",
2800 handler->fingerprint()->as_basic_args_string(),
2801 handler->fingerprint()->as_string(), insts_size);
2802 st->print_cr("c2i argument handler starts at " INTPTR_FORMAT, p2i(handler->get_c2i_entry()));
2803 if (Verbose || PrintStubCode) {
2804 address first_pc = adapter_blob->content_begin();
2805 if (first_pc != nullptr) {
2806 Disassembler::decode(first_pc, first_pc + insts_size, st, &adapter_blob->asm_remarks());
2807 st->cr();
2808 }
2809 }
2810 }
2811 #endif // PRODUCT
2812
2813 void AdapterHandlerLibrary::address_to_offset(address entry_address[AdapterBlob::ENTRY_COUNT],
2814 int entry_offset[AdapterBlob::ENTRY_COUNT]) {
2815 entry_offset[AdapterBlob::I2C] = 0;
2816 entry_offset[AdapterBlob::C2I] = entry_address[AdapterBlob::C2I] - entry_address[AdapterBlob::I2C];
2817 entry_offset[AdapterBlob::C2I_Unverified] = entry_address[AdapterBlob::C2I_Unverified] - entry_address[AdapterBlob::I2C];
2818 if (entry_address[AdapterBlob::C2I_No_Clinit_Check] == nullptr) {
2819 entry_offset[AdapterBlob::C2I_No_Clinit_Check] = -1;
2820 } else {
2821 entry_offset[AdapterBlob::C2I_No_Clinit_Check] = entry_address[AdapterBlob::C2I_No_Clinit_Check] - entry_address[AdapterBlob::I2C];
2822 }
2823 }
2824
2825 bool AdapterHandlerLibrary::generate_adapter_code(AdapterHandlerEntry* handler,
2826 int total_args_passed,
2827 BasicType* sig_bt,
2828 bool is_transient) {
2829 if (log_is_enabled(Info, perf, class, link)) {
2830 ClassLoader::perf_method_adapters_count()->inc();
2831 }
2832
2833 #ifndef ZERO
2834 BufferBlob* buf = buffer_blob(); // the temporary code buffer in CodeCache
2835 CodeBuffer buffer(buf);
2836 short buffer_locs[20];
2837 buffer.insts()->initialize_shared_locs((relocInfo*)buffer_locs,
2838 sizeof(buffer_locs)/sizeof(relocInfo));
2839 MacroAssembler masm(&buffer);
2840 VMRegPair stack_regs[16];
2841 VMRegPair* regs = (total_args_passed <= 16) ? stack_regs : NEW_RESOURCE_ARRAY(VMRegPair, total_args_passed);
2842
2843 // Get a description of the compiled java calling convention and the largest used (VMReg) stack slot usage
2844 int comp_args_on_stack = SharedRuntime::java_calling_convention(sig_bt, regs, total_args_passed);
2845 address entry_address[AdapterBlob::ENTRY_COUNT];
2846 SharedRuntime::generate_i2c2i_adapters(&masm,
2847 total_args_passed,
2848 comp_args_on_stack,
2849 sig_bt,
2850 regs,
2851 entry_address);
2852 // On zero there is no code to save and no need to create a blob and
2853 // or relocate the handler.
2854 int entry_offset[AdapterBlob::ENTRY_COUNT];
2855 address_to_offset(entry_address, entry_offset);
2856 #ifdef ASSERT
2857 if (VerifyAdapterSharing) {
2858 handler->save_code(buf->code_begin(), buffer.insts_size());
2859 if (is_transient) {
2860 return true;
2861 }
2862 }
2863 #endif
2864 AdapterBlob* adapter_blob = AdapterBlob::create(&buffer, entry_offset);
2865 if (adapter_blob == nullptr) {
2866 // CodeCache is full, disable compilation
2867 // Ought to log this but compile log is only per compile thread
2868 // and we're some non descript Java thread.
2869 return false;
2870 }
2871 handler->set_adapter_blob(adapter_blob);
2872 if (!is_transient && AOTCodeCache::is_dumping_adapter()) {
2873 // try to save generated code
2874 const char* name = AdapterHandlerLibrary::name(handler);
2875 const uint32_t id = AdapterHandlerLibrary::id(handler);
2876 bool success = AOTCodeCache::store_code_blob(*adapter_blob, AOTCodeEntry::Adapter, id, name);
2877 assert(success || !AOTCodeCache::is_dumping_adapter(), "caching of adapter must be disabled");
2878 }
2879 #endif // ZERO
2880
2881 #ifndef PRODUCT
2882 // debugging support
2883 if (PrintAdapterHandlers || PrintStubCode) {
2884 print_adapter_handler_info(tty, handler);
2885 }
2886 #endif
2887
2888 return true;
2889 }
2890
2891 AdapterHandlerEntry* AdapterHandlerLibrary::create_adapter(int total_args_passed,
2892 BasicType* sig_bt,
2893 bool is_transient) {
2894 AdapterFingerPrint* fp = AdapterFingerPrint::allocate(total_args_passed, sig_bt);
2895 AdapterHandlerEntry* handler = AdapterHandlerLibrary::new_entry(fp);
2896 if (!generate_adapter_code(handler, total_args_passed, sig_bt, is_transient)) {
2897 AdapterHandlerEntry::deallocate(handler);
2898 return nullptr;
2899 }
2900 if (!is_transient) {
2901 assert_lock_strong(AdapterHandlerLibrary_lock);
2902 _adapter_handler_table->put(fp, handler);
2903 }
2904 return handler;
2905 }
2906
2907 #if INCLUDE_CDS
2908 void AdapterHandlerEntry::remove_unshareable_info() {
2909 #ifdef ASSERT
2910 _saved_code = nullptr;
2911 _saved_code_length = 0;
2912 #endif // ASSERT
2913 _adapter_blob = nullptr;
2914 _linked = false;
2915 }
2916
2917 class CopyAdapterTableToArchive : StackObj {
2918 private:
2919 CompactHashtableWriter* _writer;
2920 ArchiveBuilder* _builder;
2921 public:
2922 CopyAdapterTableToArchive(CompactHashtableWriter* writer) : _writer(writer),
2923 _builder(ArchiveBuilder::current())
2924 {}
2925
2926 bool do_entry(AdapterFingerPrint* fp, AdapterHandlerEntry* entry) {
2927 LogStreamHandle(Trace, aot) lsh;
2928 if (ArchiveBuilder::current()->has_been_archived((address)entry)) {
2929 assert(ArchiveBuilder::current()->has_been_archived((address)fp), "must be");
2930 AdapterFingerPrint* buffered_fp = ArchiveBuilder::current()->get_buffered_addr(fp);
2931 assert(buffered_fp != nullptr,"sanity check");
2932 AdapterHandlerEntry* buffered_entry = ArchiveBuilder::current()->get_buffered_addr(entry);
2933 assert(buffered_entry != nullptr,"sanity check");
2934
2979 // This method is used during production run to link archived adapters (stored in AOT Cache)
2980 // to their code in AOT Code Cache
2981 void AdapterHandlerEntry::link() {
2982 ResourceMark rm;
2983 assert(_fingerprint != nullptr, "_fingerprint must not be null");
2984 bool generate_code = false;
2985 // Generate code only if AOTCodeCache is not available, or
2986 // caching adapters is disabled, or we fail to link
2987 // the AdapterHandlerEntry to its code in the AOTCodeCache
2988 if (AOTCodeCache::is_using_adapter()) {
2989 AdapterHandlerLibrary::link_aot_adapter_handler(this);
2990 // If link_aot_adapter_handler() succeeds, _adapter_blob will be non-null
2991 if (_adapter_blob == nullptr) {
2992 log_warning(aot)("Failed to link AdapterHandlerEntry (fp=%s) to its code in the AOT code cache", _fingerprint->as_basic_args_string());
2993 generate_code = true;
2994 }
2995 } else {
2996 generate_code = true;
2997 }
2998 if (generate_code) {
2999 int nargs;
3000 BasicType* bt = _fingerprint->as_basic_type(nargs);
3001 if (!AdapterHandlerLibrary::generate_adapter_code(this, nargs, bt, /* is_transient */ false)) {
3002 // Don't throw exceptions during VM initialization because java.lang.* classes
3003 // might not have been initialized, causing problems when constructing the
3004 // Java exception object.
3005 vm_exit_during_initialization("Out of space in CodeCache for adapters");
3006 }
3007 }
3008 if (_adapter_blob != nullptr) {
3009 post_adapter_creation(this);
3010 }
3011 assert(_linked, "AdapterHandlerEntry must now be linked");
3012 }
3013
3014 void AdapterHandlerLibrary::link_aot_adapters() {
3015 uint max_id = 0;
3016 assert(AOTCodeCache::is_using_adapter(), "AOT adapters code should be available");
3017 /* It is possible that some adapters generated in assembly phase are not stored in the cache.
3018 * That implies adapter ids of the adapters in the cache may not be contiguous.
3019 * If the size of the _aot_adapter_handler_table is used to initialize _id_counter, then it may
3020 * result in collision of adapter ids between AOT stored handlers and runtime generated handlers.
3021 * To avoid such situation, initialize the _id_counter with the largest adapter id among the AOT stored handlers.
3022 */
3023 _aot_adapter_handler_table.iterate_all([&](AdapterHandlerEntry* entry) {
3024 assert(!entry->is_linked(), "AdapterHandlerEntry is already linked!");
3025 entry->link();
3026 max_id = MAX2(max_id, entry->id());
3027 });
3028 // Set adapter id to the maximum id found in the AOTCache
3029 assert(_id_counter == 0, "Did not expect new AdapterHandlerEntry to be created at this stage");
3030 _id_counter = max_id;
3031 }
3032
3033 // This method is called during production run to lookup simple adapters
3034 // in the archived adapter handler table
3035 void AdapterHandlerLibrary::lookup_simple_adapters() {
3036 assert(!_aot_adapter_handler_table.empty(), "archived adapter handler table is empty");
3037
3038 MutexLocker mu(AdapterHandlerLibrary_lock);
3039 _no_arg_handler = lookup(0, nullptr);
3040
3041 BasicType obj_args[] = { T_OBJECT };
3042 _obj_arg_handler = lookup(1, obj_args);
3043
3044 BasicType int_args[] = { T_INT };
3045 _int_arg_handler = lookup(1, int_args);
3046
3047 BasicType obj_int_args[] = { T_OBJECT, T_INT };
3048 _obj_int_arg_handler = lookup(2, obj_int_args);
3049
3050 BasicType obj_obj_args[] = { T_OBJECT, T_OBJECT };
3051 _obj_obj_arg_handler = lookup(2, obj_obj_args);
3052
3053 assert(_no_arg_handler != nullptr &&
3054 _obj_arg_handler != nullptr &&
3055 _int_arg_handler != nullptr &&
3056 _obj_int_arg_handler != nullptr &&
3057 _obj_obj_arg_handler != nullptr, "Initial adapters not found in archived adapter handler table");
3058 assert(_no_arg_handler->is_linked() &&
3059 _obj_arg_handler->is_linked() &&
3060 _int_arg_handler->is_linked() &&
3061 _obj_int_arg_handler->is_linked() &&
3062 _obj_obj_arg_handler->is_linked(), "Initial adapters not in linked state");
3063 }
3064 #endif // INCLUDE_CDS
3065
3066 void AdapterHandlerEntry::metaspace_pointers_do(MetaspaceClosure* it) {
3067 LogStreamHandle(Trace, aot) lsh;
3068 if (lsh.is_enabled()) {
3069 lsh.print("Iter(AdapterHandlerEntry): %p(%s)", this, _fingerprint->as_basic_args_string());
3070 lsh.cr();
3071 }
3072 it->push(&_fingerprint);
3073 }
3074
3075 AdapterHandlerEntry::~AdapterHandlerEntry() {
3076 if (_fingerprint != nullptr) {
3077 AdapterFingerPrint::deallocate(_fingerprint);
3078 _fingerprint = nullptr;
3079 }
3080 #ifdef ASSERT
3081 FREE_C_HEAP_ARRAY(unsigned char, _saved_code);
3082 #endif
3083 FreeHeap(this);
3084 }
3085
3086
3087 #ifdef ASSERT
3088 // Capture the code before relocation so that it can be compared
3089 // against other versions. If the code is captured after relocation
3090 // then relative instructions won't be equivalent.
3091 void AdapterHandlerEntry::save_code(unsigned char* buffer, int length) {
3092 _saved_code = NEW_C_HEAP_ARRAY(unsigned char, length, mtCode);
3093 _saved_code_length = length;
3094 memcpy(_saved_code, buffer, length);
3095 }
3096
3097
3098 bool AdapterHandlerEntry::compare_code(AdapterHandlerEntry* other) {
3099 assert(_saved_code != nullptr && other->_saved_code != nullptr, "code not saved");
3147
3148 struct { double data[20]; } locs_buf;
3149 struct { double data[20]; } stubs_locs_buf;
3150 buffer.insts()->initialize_shared_locs((relocInfo*)&locs_buf, sizeof(locs_buf) / sizeof(relocInfo));
3151 #if defined(AARCH64) || defined(PPC64)
3152 // On AArch64 with ZGC and nmethod entry barriers, we need all oops to be
3153 // in the constant pool to ensure ordering between the barrier and oops
3154 // accesses. For native_wrappers we need a constant.
3155 // On PPC64 the continuation enter intrinsic needs the constant pool for the compiled
3156 // static java call that is resolved in the runtime.
3157 if (PPC64_ONLY(method->is_continuation_enter_intrinsic() &&) true) {
3158 buffer.initialize_consts_size(8 PPC64_ONLY(+ 24));
3159 }
3160 #endif
3161 buffer.stubs()->initialize_shared_locs((relocInfo*)&stubs_locs_buf, sizeof(stubs_locs_buf) / sizeof(relocInfo));
3162 MacroAssembler _masm(&buffer);
3163
3164 // Fill in the signature array, for the calling-convention call.
3165 const int total_args_passed = method->size_of_parameters();
3166
3167 VMRegPair stack_regs[16];
3168 VMRegPair* regs = (total_args_passed <= 16) ? stack_regs : NEW_RESOURCE_ARRAY(VMRegPair, total_args_passed);
3169
3170 AdapterSignatureIterator si(method->signature(), method->constMethod()->fingerprint(),
3171 method->is_static(), total_args_passed);
3172 BasicType* sig_bt = si.basic_types();
3173 assert(si.slots() == total_args_passed, "");
3174 BasicType ret_type = si.return_type();
3175
3176 // Now get the compiled-Java arguments layout.
3177 SharedRuntime::java_calling_convention(sig_bt, regs, total_args_passed);
3178
3179 // Generate the compiled-to-native wrapper code
3180 nm = SharedRuntime::generate_native_wrapper(&_masm, method, compile_id, sig_bt, regs, ret_type);
3181
3182 if (nm != nullptr) {
3183 {
3184 MutexLocker pl(NMethodState_lock, Mutex::_no_safepoint_check_flag);
3185 if (nm->make_in_use()) {
3186 method->set_code(method, nm);
3187 }
3188 }
3189
3190 DirectiveSet* directive = DirectivesStack::getMatchingDirective(method, CompileBroker::compiler(CompLevel_simple));
3191 if (directive->PrintAssemblyOption) {
3192 nm->print_code();
3193 }
3194 DirectivesStack::release(directive);
3402 if (b == handler->adapter_blob()) {
3403 found = true;
3404 st->print("Adapter for signature: ");
3405 handler->print_adapter_on(st);
3406 return false; // abort iteration
3407 } else {
3408 return true; // keep looking
3409 }
3410 };
3411 assert_locked_or_safepoint(AdapterHandlerLibrary_lock);
3412 _adapter_handler_table->iterate(findblob_runtime_table);
3413 }
3414 assert(found, "Should have found handler");
3415 }
3416
3417 void AdapterHandlerEntry::print_adapter_on(outputStream* st) const {
3418 st->print("AHE@" INTPTR_FORMAT ": %s", p2i(this), fingerprint()->as_string());
3419 if (adapter_blob() != nullptr) {
3420 st->print(" i2c: " INTPTR_FORMAT, p2i(get_i2c_entry()));
3421 st->print(" c2i: " INTPTR_FORMAT, p2i(get_c2i_entry()));
3422 st->print(" c2iUV: " INTPTR_FORMAT, p2i(get_c2i_unverified_entry()));
3423 if (get_c2i_no_clinit_check_entry() != nullptr) {
3424 st->print(" c2iNCI: " INTPTR_FORMAT, p2i(get_c2i_no_clinit_check_entry()));
3425 }
3426 }
3427 st->cr();
3428 }
3429
3430 #ifndef PRODUCT
3431
3432 void AdapterHandlerLibrary::print_statistics() {
3433 print_table_statistics();
3434 }
3435
3436 #endif /* PRODUCT */
3437
3438 JRT_LEAF(void, SharedRuntime::enable_stack_reserved_zone(JavaThread* current))
3439 assert(current == JavaThread::current(), "pre-condition");
3440 StackOverflow* overflow_state = current->stack_overflow_state();
3441 overflow_state->enable_stack_reserved_zone(/*check_if_disabled*/true);
3442 overflow_state->set_reserved_stack_activation(current->stack_base());
3489 event.set_method(method);
3490 event.commit();
3491 }
3492 }
3493 }
3494 return activation;
3495 }
3496
3497 void SharedRuntime::on_slowpath_allocation_exit(JavaThread* current) {
3498 // After any safepoint, just before going back to compiled code,
3499 // we inform the GC that we will be doing initializing writes to
3500 // this object in the future without emitting card-marks, so
3501 // GC may take any compensating steps.
3502
3503 oop new_obj = current->vm_result_oop();
3504 if (new_obj == nullptr) return;
3505
3506 BarrierSet *bs = BarrierSet::barrier_set();
3507 bs->on_slowpath_allocation_exit(current, new_obj);
3508 }
|
28 #include "classfile/javaClasses.inline.hpp"
29 #include "classfile/stringTable.hpp"
30 #include "classfile/vmClasses.hpp"
31 #include "classfile/vmSymbols.hpp"
32 #include "code/aotCodeCache.hpp"
33 #include "code/codeCache.hpp"
34 #include "code/compiledIC.hpp"
35 #include "code/nmethod.inline.hpp"
36 #include "code/scopeDesc.hpp"
37 #include "code/vtableStubs.hpp"
38 #include "compiler/abstractCompiler.hpp"
39 #include "compiler/compileBroker.hpp"
40 #include "compiler/disassembler.hpp"
41 #include "gc/shared/barrierSet.hpp"
42 #include "gc/shared/collectedHeap.hpp"
43 #include "interpreter/interpreter.hpp"
44 #include "interpreter/interpreterRuntime.hpp"
45 #include "jfr/jfrEvents.hpp"
46 #include "jvm.h"
47 #include "logging/log.hpp"
48 #include "memory/oopFactory.hpp"
49 #include "memory/resourceArea.hpp"
50 #include "memory/universe.hpp"
51 #include "metaprogramming/primitiveConversions.hpp"
52 #include "oops/access.hpp"
53 #include "oops/fieldStreams.inline.hpp"
54 #include "oops/inlineKlass.inline.hpp"
55 #include "oops/klass.hpp"
56 #include "oops/method.inline.hpp"
57 #include "oops/objArrayKlass.hpp"
58 #include "oops/objArrayOop.inline.hpp"
59 #include "oops/oop.inline.hpp"
60 #include "prims/forte.hpp"
61 #include "prims/jvmtiExport.hpp"
62 #include "prims/jvmtiThreadState.hpp"
63 #include "prims/methodHandles.hpp"
64 #include "prims/nativeLookup.hpp"
65 #include "runtime/arguments.hpp"
66 #include "runtime/atomicAccess.hpp"
67 #include "runtime/basicLock.inline.hpp"
68 #include "runtime/frame.inline.hpp"
69 #include "runtime/handles.inline.hpp"
70 #include "runtime/init.hpp"
71 #include "runtime/interfaceSupport.inline.hpp"
72 #include "runtime/java.hpp"
73 #include "runtime/javaCalls.hpp"
74 #include "runtime/jniHandles.inline.hpp"
75 #include "runtime/osThread.hpp"
76 #include "runtime/perfData.hpp"
77 #include "runtime/sharedRuntime.hpp"
78 #include "runtime/signature.hpp"
79 #include "runtime/stackWatermarkSet.hpp"
80 #include "runtime/stubRoutines.hpp"
81 #include "runtime/synchronizer.hpp"
82 #include "runtime/timerTrace.hpp"
83 #include "runtime/vframe.inline.hpp"
84 #include "runtime/vframeArray.hpp"
85 #include "runtime/vm_version.hpp"
86 #include "utilities/copy.hpp"
87 #include "utilities/dtrace.hpp"
88 #include "utilities/events.hpp"
89 #include "utilities/globalDefinitions.hpp"
90 #include "utilities/hashTable.hpp"
91 #include "utilities/macros.hpp"
92 #include "utilities/xmlstream.hpp"
93 #ifdef COMPILER1
94 #include "c1/c1_Runtime1.hpp"
95 #endif
96 #ifdef COMPILER2
97 #include "opto/runtime.hpp"
98 #endif
1216 // for a call current in progress, i.e., arguments has been pushed on stack
1217 // but callee has not been invoked yet. Caller frame must be compiled.
1218 Handle SharedRuntime::find_callee_info_helper(vframeStream& vfst, Bytecodes::Code& bc,
1219 CallInfo& callinfo, TRAPS) {
1220 Handle receiver;
1221 Handle nullHandle; // create a handy null handle for exception returns
1222 JavaThread* current = THREAD;
1223
1224 assert(!vfst.at_end(), "Java frame must exist");
1225
1226 // Find caller and bci from vframe
1227 methodHandle caller(current, vfst.method());
1228 int bci = vfst.bci();
1229
1230 if (caller->is_continuation_enter_intrinsic()) {
1231 bc = Bytecodes::_invokestatic;
1232 LinkResolver::resolve_continuation_enter(callinfo, CHECK_NH);
1233 return receiver;
1234 }
1235
1236 // Substitutability test implementation piggy backs on static call resolution
1237 Bytecodes::Code code = caller->java_code_at(bci);
1238 if (code == Bytecodes::_if_acmpeq || code == Bytecodes::_if_acmpne) {
1239 bc = Bytecodes::_invokestatic;
1240 methodHandle attached_method(THREAD, extract_attached_method(vfst));
1241 assert(attached_method.not_null(), "must have attached method");
1242 vmClasses::ValueObjectMethods_klass()->initialize(CHECK_NH);
1243 LinkResolver::resolve_invoke(callinfo, receiver, attached_method, bc, false, CHECK_NH);
1244 #ifdef ASSERT
1245 Symbol* subst_method_name = UseAltSubstitutabilityMethod ? vmSymbols::isSubstitutableAlt_name() : vmSymbols::isSubstitutable_name();
1246 Method* is_subst = vmClasses::ValueObjectMethods_klass()->find_method(subst_method_name, vmSymbols::object_object_boolean_signature());
1247 assert(callinfo.selected_method() == is_subst, "must be isSubstitutable method");
1248 #endif
1249 return receiver;
1250 }
1251
1252 Bytecode_invoke bytecode(caller, bci);
1253 int bytecode_index = bytecode.index();
1254 bc = bytecode.invoke_code();
1255
1256 methodHandle attached_method(current, extract_attached_method(vfst));
1257 if (attached_method.not_null()) {
1258 Method* callee = bytecode.static_target(CHECK_NH);
1259 vmIntrinsics::ID id = callee->intrinsic_id();
1260 // When VM replaces MH.invokeBasic/linkTo* call with a direct/virtual call,
1261 // it attaches statically resolved method to the call site.
1262 if (MethodHandles::is_signature_polymorphic(id) &&
1263 MethodHandles::is_signature_polymorphic_intrinsic(id)) {
1264 bc = MethodHandles::signature_polymorphic_intrinsic_bytecode(id);
1265
1266 // Adjust invocation mode according to the attached method.
1267 switch (bc) {
1268 case Bytecodes::_invokevirtual:
1269 if (attached_method->method_holder()->is_interface()) {
1270 bc = Bytecodes::_invokeinterface;
1271 }
1272 break;
1273 case Bytecodes::_invokeinterface:
1274 if (!attached_method->method_holder()->is_interface()) {
1275 bc = Bytecodes::_invokevirtual;
1276 }
1277 break;
1278 case Bytecodes::_invokehandle:
1279 if (!MethodHandles::is_signature_polymorphic_method(attached_method())) {
1280 bc = attached_method->is_static() ? Bytecodes::_invokestatic
1281 : Bytecodes::_invokevirtual;
1282 }
1283 break;
1284 default:
1285 break;
1286 }
1287 } else {
1288 assert(attached_method->has_scalarized_args(), "invalid use of attached method");
1289 if (!attached_method->method_holder()->is_inline_klass()) {
1290 // Ignore the attached method in this case to not confuse below code
1291 attached_method = methodHandle(current, nullptr);
1292 }
1293 }
1294 }
1295
1296 assert(bc != Bytecodes::_illegal, "not initialized");
1297
1298 bool has_receiver = bc != Bytecodes::_invokestatic &&
1299 bc != Bytecodes::_invokedynamic &&
1300 bc != Bytecodes::_invokehandle;
1301 bool check_null_and_abstract = true;
1302
1303 // Find receiver for non-static call
1304 if (has_receiver) {
1305 // This register map must be update since we need to find the receiver for
1306 // compiled frames. The receiver might be in a register.
1307 RegisterMap reg_map2(current,
1308 RegisterMap::UpdateMap::include,
1309 RegisterMap::ProcessFrames::include,
1310 RegisterMap::WalkContinuation::skip);
1311 frame stubFrame = current->last_frame();
1312 // Caller-frame is a compiled frame
1313 frame callerFrame = stubFrame.sender(®_map2);
1314
1315 Method* callee = attached_method();
1316 if (callee == nullptr) {
1317 callee = bytecode.static_target(CHECK_NH);
1318 if (callee == nullptr) {
1319 THROW_(vmSymbols::java_lang_NoSuchMethodException(), nullHandle);
1320 }
1321 }
1322 bool caller_is_c1 = callerFrame.is_compiled_frame() && callerFrame.cb()->as_nmethod()->is_compiled_by_c1();
1323 if (!caller_is_c1 && callee->is_scalarized_arg(0)) {
1324 // If the receiver is an inline type that is passed as fields, no oop is available
1325 // Resolve the call without receiver null checking.
1326 assert(!callee->mismatch(), "calls with inline type receivers should never mismatch");
1327 assert(attached_method.not_null() && !attached_method->is_abstract(), "must have non-abstract attached method");
1328 if (bc == Bytecodes::_invokeinterface) {
1329 bc = Bytecodes::_invokevirtual; // C2 optimistically replaces interface calls by virtual calls
1330 }
1331 check_null_and_abstract = false;
1332 } else {
1333 // Retrieve from a compiled argument list
1334 receiver = Handle(current, callerFrame.retrieve_receiver(®_map2));
1335 assert(oopDesc::is_oop_or_null(receiver()), "");
1336 if (receiver.is_null()) {
1337 THROW_(vmSymbols::java_lang_NullPointerException(), nullHandle);
1338 }
1339 }
1340 }
1341
1342 // Resolve method
1343 if (attached_method.not_null()) {
1344 // Parameterized by attached method.
1345 LinkResolver::resolve_invoke(callinfo, receiver, attached_method, bc, check_null_and_abstract, CHECK_NH);
1346 } else {
1347 // Parameterized by bytecode.
1348 constantPoolHandle constants(current, caller->constants());
1349 LinkResolver::resolve_invoke(callinfo, receiver, constants, bytecode_index, bc, CHECK_NH);
1350 }
1351
1352 #ifdef ASSERT
1353 // Check that the receiver klass is of the right subtype and that it is initialized for virtual calls
1354 if (has_receiver && check_null_and_abstract) {
1355 assert(receiver.not_null(), "should have thrown exception");
1356 Klass* receiver_klass = receiver->klass();
1357 Klass* rk = nullptr;
1358 if (attached_method.not_null()) {
1359 // In case there's resolved method attached, use its holder during the check.
1360 rk = attached_method->method_holder();
1361 } else {
1362 // Klass is already loaded.
1363 constantPoolHandle constants(current, caller->constants());
1364 rk = constants->klass_ref_at(bytecode_index, bc, CHECK_NH);
1365 }
1366 Klass* static_receiver_klass = rk;
1367 assert(receiver_klass->is_subtype_of(static_receiver_klass),
1368 "actual receiver must be subclass of static receiver klass");
1369 if (receiver_klass->is_instance_klass()) {
1370 if (InstanceKlass::cast(receiver_klass)->is_not_initialized()) {
1371 tty->print_cr("ERROR: Klass not yet initialized!!");
1372 receiver_klass->print();
1373 }
1374 assert(!InstanceKlass::cast(receiver_klass)->is_not_initialized(), "receiver_klass must be initialized");
1375 }
1376 }
1377 #endif
1378
1379 return receiver;
1380 }
1381
1382 methodHandle SharedRuntime::find_callee_method(bool& caller_does_not_scalarize, TRAPS) {
1383 JavaThread* current = THREAD;
1384 ResourceMark rm(current);
1385 // We need first to check if any Java activations (compiled, interpreted)
1386 // exist on the stack since last JavaCall. If not, we need
1387 // to get the target method from the JavaCall wrapper.
1388 vframeStream vfst(current, true); // Do not skip any javaCalls
1389 methodHandle callee_method;
1390 if (vfst.at_end()) {
1391 // No Java frames were found on stack since we did the JavaCall.
1392 // Hence the stack can only contain an entry_frame. We need to
1393 // find the target method from the stub frame.
1394 RegisterMap reg_map(current,
1395 RegisterMap::UpdateMap::skip,
1396 RegisterMap::ProcessFrames::include,
1397 RegisterMap::WalkContinuation::skip);
1398 frame fr = current->last_frame();
1399 assert(fr.is_runtime_frame(), "must be a runtimeStub");
1400 fr = fr.sender(®_map);
1401 assert(fr.is_entry_frame(), "must be");
1402 // fr is now pointing to the entry frame.
1403 callee_method = methodHandle(current, fr.entry_frame_call_wrapper()->callee_method());
1404 } else {
1405 Bytecodes::Code bc;
1406 CallInfo callinfo;
1407 find_callee_info_helper(vfst, bc, callinfo, CHECK_(methodHandle()));
1408 // Calls via mismatching methods are always non-scalarized
1409 if (callinfo.resolved_method()->mismatch()) {
1410 caller_does_not_scalarize = true;
1411 }
1412 callee_method = methodHandle(current, callinfo.selected_method());
1413 }
1414 assert(callee_method()->is_method(), "must be");
1415 return callee_method;
1416 }
1417
1418 // Resolves a call.
1419 methodHandle SharedRuntime::resolve_helper(bool is_virtual, bool is_optimized, bool& caller_does_not_scalarize, TRAPS) {
1420 JavaThread* current = THREAD;
1421 ResourceMark rm(current);
1422 RegisterMap cbl_map(current,
1423 RegisterMap::UpdateMap::skip,
1424 RegisterMap::ProcessFrames::include,
1425 RegisterMap::WalkContinuation::skip);
1426 frame caller_frame = current->last_frame().sender(&cbl_map);
1427
1428 CodeBlob* caller_cb = caller_frame.cb();
1429 guarantee(caller_cb != nullptr && caller_cb->is_nmethod(), "must be called from compiled method");
1430 nmethod* caller_nm = caller_cb->as_nmethod();
1431
1432 // determine call info & receiver
1433 // note: a) receiver is null for static calls
1434 // b) an exception is thrown if receiver is null for non-static calls
1435 CallInfo call_info;
1436 Bytecodes::Code invoke_code = Bytecodes::_illegal;
1437 Handle receiver = find_callee_info(invoke_code, call_info, CHECK_(methodHandle()));
1438
1439 NoSafepointVerifier nsv;
1440
1441 methodHandle callee_method(current, call_info.selected_method());
1442 // Calls via mismatching methods are always non-scalarized
1443 if (caller_nm->is_compiled_by_c1() || call_info.resolved_method()->mismatch()) {
1444 caller_does_not_scalarize = true;
1445 }
1446
1447 assert((!is_virtual && invoke_code == Bytecodes::_invokestatic ) ||
1448 (!is_virtual && invoke_code == Bytecodes::_invokespecial) ||
1449 (!is_virtual && invoke_code == Bytecodes::_invokehandle ) ||
1450 (!is_virtual && invoke_code == Bytecodes::_invokedynamic) ||
1451 ( is_virtual && invoke_code != Bytecodes::_invokestatic ), "inconsistent bytecode");
1452
1453 assert(!caller_nm->is_unloading(), "It should not be unloading");
1454
1455 #ifndef PRODUCT
1456 // tracing/debugging/statistics
1457 uint *addr = (is_optimized) ? (&_resolve_opt_virtual_ctr) :
1458 (is_virtual) ? (&_resolve_virtual_ctr) :
1459 (&_resolve_static_ctr);
1460 AtomicAccess::inc(addr);
1461
1462 if (TraceCallFixup) {
1463 ResourceMark rm(current);
1464 tty->print("resolving %s%s (%s) %s call to",
1465 (is_optimized) ? "optimized " : "", (is_virtual) ? "virtual" : "static",
1466 Bytecodes::name(invoke_code), (caller_does_not_scalarize) ? "non-scalar" : "");
1467 callee_method->print_short_name(tty);
1468 tty->print_cr(" at pc: " INTPTR_FORMAT " to code: " INTPTR_FORMAT,
1469 p2i(caller_frame.pc()), p2i(callee_method->code()));
1470 }
1471 #endif
1472
1473 if (invoke_code == Bytecodes::_invokestatic) {
1474 assert(callee_method->method_holder()->is_initialized() ||
1475 callee_method->method_holder()->is_reentrant_initialization(current),
1476 "invalid class initialization state for invoke_static");
1477 if (!VM_Version::supports_fast_class_init_checks() && callee_method->needs_clinit_barrier()) {
1478 // In order to keep class initialization check, do not patch call
1479 // site for static call when the class is not fully initialized.
1480 // Proper check is enforced by call site re-resolution on every invocation.
1481 //
1482 // When fast class initialization checks are supported (VM_Version::supports_fast_class_init_checks() == true),
1483 // explicit class initialization check is put in nmethod entry (VEP).
1484 assert(callee_method->method_holder()->is_linked(), "must be");
1485 return callee_method;
1486 }
1487 }
1488
1489
1490 // JSR 292 key invariant:
1491 // If the resolved method is a MethodHandle invoke target, the call
1492 // site must be a MethodHandle call site, because the lambda form might tail-call
1493 // leaving the stack in a state unknown to either caller or callee
1494
1495 // Compute entry points. The computation of the entry points is independent of
1496 // patching the call.
1497
1498 // Make sure the callee nmethod does not get deoptimized and removed before
1499 // we are done patching the code.
1500
1501
1502 CompiledICLocker ml(caller_nm);
1503 if (is_virtual && !is_optimized) {
1504 CompiledIC* inline_cache = CompiledIC_before(caller_nm, caller_frame.pc());
1505 inline_cache->update(&call_info, receiver->klass(), caller_does_not_scalarize);
1506 } else {
1507 // Callsite is a direct call - set it to the destination method
1508 CompiledDirectCall* callsite = CompiledDirectCall::before(caller_frame.pc());
1509 callsite->set(callee_method, caller_does_not_scalarize);
1510 }
1511
1512 return callee_method;
1513 }
1514
1515 // Inline caches exist only in compiled code
1516 JRT_BLOCK_ENTRY(address, SharedRuntime::handle_wrong_method_ic_miss(JavaThread* current))
1517 #ifdef ASSERT
1518 RegisterMap reg_map(current,
1519 RegisterMap::UpdateMap::skip,
1520 RegisterMap::ProcessFrames::include,
1521 RegisterMap::WalkContinuation::skip);
1522 frame stub_frame = current->last_frame();
1523 assert(stub_frame.is_runtime_frame(), "sanity check");
1524 frame caller_frame = stub_frame.sender(®_map);
1525 assert(!caller_frame.is_interpreted_frame() && !caller_frame.is_entry_frame() && !caller_frame.is_upcall_stub_frame(), "unexpected frame");
1526 #endif /* ASSERT */
1527
1528 methodHandle callee_method;
1529 bool caller_does_not_scalarize = false;
1530 JRT_BLOCK
1531 callee_method = SharedRuntime::handle_ic_miss_helper(caller_does_not_scalarize, CHECK_NULL);
1532 // Return Method* through TLS
1533 current->set_vm_result_metadata(callee_method());
1534 JRT_BLOCK_END
1535 // return compiled code entry point after potential safepoints
1536 return get_resolved_entry(current, callee_method, false, false, caller_does_not_scalarize);
1537 JRT_END
1538
1539
1540 // Handle call site that has been made non-entrant
1541 JRT_BLOCK_ENTRY(address, SharedRuntime::handle_wrong_method(JavaThread* current))
1542 // 6243940 We might end up in here if the callee is deoptimized
1543 // as we race to call it. We don't want to take a safepoint if
1544 // the caller was interpreted because the caller frame will look
1545 // interpreted to the stack walkers and arguments are now
1546 // "compiled" so it is much better to make this transition
1547 // invisible to the stack walking code. The i2c path will
1548 // place the callee method in the callee_target. It is stashed
1549 // there because if we try and find the callee by normal means a
1550 // safepoint is possible and have trouble gc'ing the compiled args.
1551 RegisterMap reg_map(current,
1552 RegisterMap::UpdateMap::skip,
1553 RegisterMap::ProcessFrames::include,
1554 RegisterMap::WalkContinuation::skip);
1555 frame stub_frame = current->last_frame();
1556 assert(stub_frame.is_runtime_frame(), "sanity check");
1557 frame caller_frame = stub_frame.sender(®_map);
1558
1559 if (caller_frame.is_interpreted_frame() ||
1560 caller_frame.is_entry_frame() ||
1561 caller_frame.is_upcall_stub_frame()) {
1562 Method* callee = current->callee_target();
1563 guarantee(callee != nullptr && callee->is_method(), "bad handshake");
1564 current->set_vm_result_metadata(callee);
1565 current->set_callee_target(nullptr);
1566 if (caller_frame.is_entry_frame() && VM_Version::supports_fast_class_init_checks()) {
1567 // Bypass class initialization checks in c2i when caller is in native.
1568 // JNI calls to static methods don't have class initialization checks.
1569 // Fast class initialization checks are present in c2i adapters and call into
1570 // SharedRuntime::handle_wrong_method() on the slow path.
1571 //
1572 // JVM upcalls may land here as well, but there's a proper check present in
1573 // LinkResolver::resolve_static_call (called from JavaCalls::call_static),
1574 // so bypassing it in c2i adapter is benign.
1575 return callee->get_c2i_no_clinit_check_entry();
1576 } else {
1577 if (caller_frame.is_interpreted_frame()) {
1578 return callee->get_c2i_inline_entry();
1579 } else {
1580 return callee->get_c2i_entry();
1581 }
1582 }
1583 }
1584
1585 // Must be compiled to compiled path which is safe to stackwalk
1586 methodHandle callee_method;
1587 bool is_static_call = false;
1588 bool is_optimized = false;
1589 bool caller_does_not_scalarize = false;
1590 JRT_BLOCK
1591 // Force resolving of caller (if we called from compiled frame)
1592 callee_method = SharedRuntime::reresolve_call_site(is_optimized, caller_does_not_scalarize, CHECK_NULL);
1593 current->set_vm_result_metadata(callee_method());
1594 JRT_BLOCK_END
1595 // return compiled code entry point after potential safepoints
1596 return get_resolved_entry(current, callee_method, callee_method->is_static(), is_optimized, caller_does_not_scalarize);
1597 JRT_END
1598
1599 // Handle abstract method call
1600 JRT_BLOCK_ENTRY(address, SharedRuntime::handle_wrong_method_abstract(JavaThread* current))
1601 // Verbose error message for AbstractMethodError.
1602 // Get the called method from the invoke bytecode.
1603 vframeStream vfst(current, true);
1604 assert(!vfst.at_end(), "Java frame must exist");
1605 methodHandle caller(current, vfst.method());
1606 Bytecode_invoke invoke(caller, vfst.bci());
1607 DEBUG_ONLY( invoke.verify(); )
1608
1609 // Find the compiled caller frame.
1610 RegisterMap reg_map(current,
1611 RegisterMap::UpdateMap::include,
1612 RegisterMap::ProcessFrames::include,
1613 RegisterMap::WalkContinuation::skip);
1614 frame stubFrame = current->last_frame();
1615 assert(stubFrame.is_runtime_frame(), "must be");
1616 frame callerFrame = stubFrame.sender(®_map);
1617 assert(callerFrame.is_compiled_frame(), "must be");
1618
1619 // Install exception and return forward entry.
1620 address res = SharedRuntime::throw_AbstractMethodError_entry();
1621 JRT_BLOCK
1622 methodHandle callee(current, invoke.static_target(current));
1623 if (!callee.is_null()) {
1624 oop recv = callerFrame.retrieve_receiver(®_map);
1625 Klass *recv_klass = (recv != nullptr) ? recv->klass() : nullptr;
1626 res = StubRoutines::forward_exception_entry();
1627 LinkResolver::throw_abstract_method_error(callee, recv_klass, CHECK_(res));
1628 }
1629 JRT_BLOCK_END
1630 return res;
1631 JRT_END
1632
1633 // return verified_code_entry if interp_only_mode is not set for the current thread;
1634 // otherwise return c2i entry.
1635 address SharedRuntime::get_resolved_entry(JavaThread* current, methodHandle callee_method,
1636 bool is_static_call, bool is_optimized, bool caller_does_not_scalarize) {
1637 if (current->is_interp_only_mode() && !callee_method->is_special_native_intrinsic()) {
1638 // In interp_only_mode we need to go to the interpreted entry
1639 // The c2i won't patch in this mode -- see fixup_callers_callsite
1640 return callee_method->get_c2i_entry();
1641 }
1642
1643 if (caller_does_not_scalarize) {
1644 assert(callee_method->verified_inline_code_entry() != nullptr, "Jump to zero!");
1645 return callee_method->verified_inline_code_entry();
1646 } else if (is_static_call || is_optimized) {
1647 assert(callee_method->verified_code_entry() != nullptr, "Jump to zero!");
1648 return callee_method->verified_code_entry();
1649 } else {
1650 assert(callee_method->verified_inline_ro_code_entry() != nullptr, "Jump to zero!");
1651 return callee_method->verified_inline_ro_code_entry();
1652 }
1653 }
1654
1655 // resolve a static call and patch code
1656 JRT_BLOCK_ENTRY(address, SharedRuntime::resolve_static_call_C(JavaThread* current ))
1657 methodHandle callee_method;
1658 bool caller_does_not_scalarize = false;
1659 bool enter_special = false;
1660 JRT_BLOCK
1661 callee_method = SharedRuntime::resolve_helper(false, false, caller_does_not_scalarize, CHECK_NULL);
1662 current->set_vm_result_metadata(callee_method());
1663 JRT_BLOCK_END
1664 // return compiled code entry point after potential safepoints
1665 return get_resolved_entry(current, callee_method, true, false, caller_does_not_scalarize);
1666 JRT_END
1667
1668 // resolve virtual call and update inline cache to monomorphic
1669 JRT_BLOCK_ENTRY(address, SharedRuntime::resolve_virtual_call_C(JavaThread* current))
1670 methodHandle callee_method;
1671 bool caller_does_not_scalarize = false;
1672 JRT_BLOCK
1673 callee_method = SharedRuntime::resolve_helper(true, false, caller_does_not_scalarize, CHECK_NULL);
1674 current->set_vm_result_metadata(callee_method());
1675 JRT_BLOCK_END
1676 // return compiled code entry point after potential safepoints
1677 return get_resolved_entry(current, callee_method, false, false, caller_does_not_scalarize);
1678 JRT_END
1679
1680
1681 // Resolve a virtual call that can be statically bound (e.g., always
1682 // monomorphic, so it has no inline cache). Patch code to resolved target.
1683 JRT_BLOCK_ENTRY(address, SharedRuntime::resolve_opt_virtual_call_C(JavaThread* current))
1684 methodHandle callee_method;
1685 bool caller_does_not_scalarize = false;
1686 JRT_BLOCK
1687 callee_method = SharedRuntime::resolve_helper(true, true, caller_does_not_scalarize, CHECK_NULL);
1688 current->set_vm_result_metadata(callee_method());
1689 JRT_BLOCK_END
1690 // return compiled code entry point after potential safepoints
1691 return get_resolved_entry(current, callee_method, false, true, caller_does_not_scalarize);
1692 JRT_END
1693
1694
1695
1696 methodHandle SharedRuntime::handle_ic_miss_helper(bool& caller_does_not_scalarize, TRAPS) {
1697 JavaThread* current = THREAD;
1698 ResourceMark rm(current);
1699 CallInfo call_info;
1700 Bytecodes::Code bc;
1701
1702 // receiver is null for static calls. An exception is thrown for null
1703 // receivers for non-static calls
1704 Handle receiver = find_callee_info(bc, call_info, CHECK_(methodHandle()));
1705
1706 methodHandle callee_method(current, call_info.selected_method());
1707
1708 #ifndef PRODUCT
1709 AtomicAccess::inc(&_ic_miss_ctr);
1710
1711 // Statistics & Tracing
1712 if (TraceCallFixup) {
1713 ResourceMark rm(current);
1714 tty->print("IC miss (%s) %s call to", Bytecodes::name(bc), (caller_does_not_scalarize) ? "non-scalar" : "");
1715 callee_method->print_short_name(tty);
1716 tty->print_cr(" code: " INTPTR_FORMAT, p2i(callee_method->code()));
1717 }
1718
1719 if (ICMissHistogram) {
1720 MutexLocker m(VMStatistic_lock);
1721 RegisterMap reg_map(current,
1722 RegisterMap::UpdateMap::skip,
1723 RegisterMap::ProcessFrames::include,
1724 RegisterMap::WalkContinuation::skip);
1725 frame f = current->last_frame().real_sender(®_map);// skip runtime stub
1726 // produce statistics under the lock
1727 trace_ic_miss(f.pc());
1728 }
1729 #endif
1730
1731 // install an event collector so that when a vtable stub is created the
1732 // profiler can be notified via a DYNAMIC_CODE_GENERATED event. The
1733 // event can't be posted when the stub is created as locks are held
1734 // - instead the event will be deferred until the event collector goes
1735 // out of scope.
1736 JvmtiDynamicCodeEventCollector event_collector;
1737
1738 // Update inline cache to megamorphic. Skip update if we are called from interpreted.
1739 RegisterMap reg_map(current,
1740 RegisterMap::UpdateMap::skip,
1741 RegisterMap::ProcessFrames::include,
1742 RegisterMap::WalkContinuation::skip);
1743 frame caller_frame = current->last_frame().sender(®_map);
1744 CodeBlob* cb = caller_frame.cb();
1745 nmethod* caller_nm = cb->as_nmethod();
1746 // Calls via mismatching methods are always non-scalarized
1747 if (caller_nm->is_compiled_by_c1() || call_info.resolved_method()->mismatch()) {
1748 caller_does_not_scalarize = true;
1749 }
1750
1751 CompiledICLocker ml(caller_nm);
1752 CompiledIC* inline_cache = CompiledIC_before(caller_nm, caller_frame.pc());
1753 inline_cache->update(&call_info, receiver()->klass(), caller_does_not_scalarize);
1754
1755 return callee_method;
1756 }
1757
1758 //
1759 // Resets a call-site in compiled code so it will get resolved again.
1760 // This routines handles both virtual call sites, optimized virtual call
1761 // sites, and static call sites. Typically used to change a call sites
1762 // destination from compiled to interpreted.
1763 //
1764 methodHandle SharedRuntime::reresolve_call_site(bool& is_optimized, bool& caller_does_not_scalarize, TRAPS) {
1765 JavaThread* current = THREAD;
1766 ResourceMark rm(current);
1767 RegisterMap reg_map(current,
1768 RegisterMap::UpdateMap::skip,
1769 RegisterMap::ProcessFrames::include,
1770 RegisterMap::WalkContinuation::skip);
1771 frame stub_frame = current->last_frame();
1772 assert(stub_frame.is_runtime_frame(), "must be a runtimeStub");
1773 frame caller = stub_frame.sender(®_map);
1774 if (caller.is_compiled_frame()) {
1775 caller_does_not_scalarize = caller.cb()->as_nmethod()->is_compiled_by_c1();
1776 }
1777 assert(!caller.is_interpreted_frame(), "must be compiled");
1778
1779 // If the frame isn't a live compiled frame (i.e. deoptimized by the time we get here), no IC clearing must be done
1780 // for the caller. However, when the caller is C2 compiled and the callee a C1 or C2 compiled method, then we still
1781 // need to figure out whether it was an optimized virtual call with an inline type receiver. Otherwise, we end up
1782 // using the wrong method entry point and accidentally skip the buffering of the receiver.
1783 methodHandle callee_method = find_callee_method(caller_does_not_scalarize, CHECK_(methodHandle()));
1784 const bool caller_is_compiled_and_not_deoptimized = caller.is_compiled_frame() && !caller.is_deoptimized_frame();
1785 const bool caller_is_continuation_enter_intrinsic =
1786 caller.is_native_frame() && caller.cb()->as_nmethod()->method()->is_continuation_enter_intrinsic();
1787 const bool do_IC_clearing = caller_is_compiled_and_not_deoptimized || caller_is_continuation_enter_intrinsic;
1788
1789 const bool callee_compiled_with_scalarized_receiver = callee_method->has_compiled_code() &&
1790 !callee_method()->is_static() &&
1791 callee_method()->is_scalarized_arg(0);
1792 const bool compute_is_optimized = !caller_does_not_scalarize && callee_compiled_with_scalarized_receiver;
1793
1794 if (do_IC_clearing || compute_is_optimized) {
1795 address pc = caller.pc();
1796
1797 nmethod* caller_nm = CodeCache::find_nmethod(pc);
1798 assert(caller_nm != nullptr, "did not find caller nmethod");
1799
1800 // Default call_addr is the location of the "basic" call.
1801 // Determine the address of the call we a reresolving. With
1802 // Inline Caches we will always find a recognizable call.
1803 // With Inline Caches disabled we may or may not find a
1804 // recognizable call. We will always find a call for static
1805 // calls and for optimized virtual calls. For vanilla virtual
1806 // calls it depends on the state of the UseInlineCaches switch.
1807 //
1808 // With Inline Caches disabled we can get here for a virtual call
1809 // for two reasons:
1810 // 1 - calling an abstract method. The vtable for abstract methods
1811 // will run us thru handle_wrong_method and we will eventually
1812 // end up in the interpreter to throw the ame.
1813 // 2 - a racing deoptimization. We could be doing a vanilla vtable
1814 // call and between the time we fetch the entry address and
1815 // we jump to it the target gets deoptimized. Similar to 1
1816 // we will wind up in the interprter (thru a c2i with c2).
1817 //
1818 CompiledICLocker ml(caller_nm);
1819 address call_addr = caller_nm->call_instruction_address(pc);
1820
1821 if (call_addr != nullptr) {
1822 // On x86 the logic for finding a call instruction is blindly checking for a call opcode 5
1823 // bytes back in the instruction stream so we must also check for reloc info.
1824 RelocIterator iter(caller_nm, call_addr, call_addr+1);
1825 bool ret = iter.next(); // Get item
1826 if (ret) {
1827 is_optimized = false;
1828 switch (iter.type()) {
1829 case relocInfo::static_call_type:
1830 assert(callee_method->is_static(), "must be");
1831 case relocInfo::opt_virtual_call_type: {
1832 is_optimized = (iter.type() == relocInfo::opt_virtual_call_type);
1833 if (do_IC_clearing) {
1834 CompiledDirectCall* cdc = CompiledDirectCall::at(call_addr);
1835 cdc->set_to_clean();
1836 }
1837 break;
1838 }
1839 case relocInfo::virtual_call_type: {
1840 if (do_IC_clearing) {
1841 // compiled, dispatched call (which used to call an interpreted method)
1842 CompiledIC* inline_cache = CompiledIC_at(caller_nm, call_addr);
1843 inline_cache->set_to_clean();
1844 }
1845 break;
1846 }
1847 default:
1848 break;
1849 }
1850 }
1851 }
1852 }
1853
1854 #ifndef PRODUCT
1855 AtomicAccess::inc(&_wrong_method_ctr);
1856
1857 if (TraceCallFixup) {
1858 ResourceMark rm(current);
1859 tty->print("handle_wrong_method reresolving %s call to", (caller_does_not_scalarize) ? "non-scalar" : "");
1860 callee_method->print_short_name(tty);
1861 tty->print_cr(" code: " INTPTR_FORMAT, p2i(callee_method->code()));
1862 }
1863 #endif
1864
1865 return callee_method;
1866 }
1867
1868 address SharedRuntime::handle_unsafe_access(JavaThread* thread, address next_pc) {
1869 // The faulting unsafe accesses should be changed to throw the error
1870 // synchronously instead. Meanwhile the faulting instruction will be
1871 // skipped over (effectively turning it into a no-op) and an
1872 // asynchronous exception will be raised which the thread will
1873 // handle at a later point. If the instruction is a load it will
1874 // return garbage.
1875
1876 // Request an async exception.
1877 thread->set_pending_unsafe_access_error();
1878
1879 // Return address of next instruction to execute.
2045 msglen += strlen(caster_klass_description) + strlen(target_klass_description) + strlen(klass_separator) + 3;
2046
2047 char* message = NEW_RESOURCE_ARRAY_RETURN_NULL(char, msglen);
2048 if (message == nullptr) {
2049 // Shouldn't happen, but don't cause even more problems if it does
2050 message = const_cast<char*>(caster_klass->external_name());
2051 } else {
2052 jio_snprintf(message,
2053 msglen,
2054 "class %s cannot be cast to class %s (%s%s%s)",
2055 caster_name,
2056 target_name,
2057 caster_klass_description,
2058 klass_separator,
2059 target_klass_description
2060 );
2061 }
2062 return message;
2063 }
2064
2065 char* SharedRuntime::generate_identity_exception_message(JavaThread* current, Klass* klass) {
2066 assert(klass->is_inline_klass(), "Must be a concrete value class");
2067 const char* desc = "Cannot synchronize on an instance of value class ";
2068 const char* className = klass->external_name();
2069 size_t msglen = strlen(desc) + strlen(className) + 1;
2070 char* message = NEW_RESOURCE_ARRAY(char, msglen);
2071 if (nullptr == message) {
2072 // Out of memory: can't create detailed error message
2073 message = const_cast<char*>(klass->external_name());
2074 } else {
2075 jio_snprintf(message, msglen, "%s%s", desc, className);
2076 }
2077 return message;
2078 }
2079
2080 JRT_LEAF(void, SharedRuntime::reguard_yellow_pages())
2081 (void) JavaThread::current()->stack_overflow_state()->reguard_stack();
2082 JRT_END
2083
2084 void SharedRuntime::monitor_enter_helper(oopDesc* obj, BasicLock* lock, JavaThread* current) {
2085 if (!SafepointSynchronize::is_synchronizing()) {
2086 // Only try quick_enter() if we're not trying to reach a safepoint
2087 // so that the calling thread reaches the safepoint more quickly.
2088 if (ObjectSynchronizer::quick_enter(obj, lock, current)) {
2089 return;
2090 }
2091 }
2092 // NO_ASYNC required because an async exception on the state transition destructor
2093 // would leave you with the lock held and it would never be released.
2094 // The normal monitorenter NullPointerException is thrown without acquiring a lock
2095 // and the model is that an exception implies the method failed.
2096 JRT_BLOCK_NO_ASYNC
2097 Handle h_obj(THREAD, obj);
2098 ObjectSynchronizer::enter(h_obj, lock, current);
2099 assert(!HAS_PENDING_EXCEPTION, "Should have no exception here");
2293 tty->print_cr("Note 1: counter updates are not MT-safe.");
2294 tty->print_cr("Note 2: %% in major categories are relative to total non-inlined calls;");
2295 tty->print_cr(" %% in nested categories are relative to their category");
2296 tty->print_cr(" (and thus add up to more than 100%% with inlining)");
2297 tty->cr();
2298
2299 MethodArityHistogram h;
2300 }
2301 #endif
2302
2303 #ifndef PRODUCT
2304 static int _lookups; // number of calls to lookup
2305 static int _equals; // number of buckets checked with matching hash
2306 static int _archived_hits; // number of successful lookups in archived table
2307 static int _runtime_hits; // number of successful lookups in runtime table
2308 #endif
2309
2310 // A simple wrapper class around the calling convention information
2311 // that allows sharing of adapters for the same calling convention.
2312 class AdapterFingerPrint : public MetaspaceObj {
2313 public:
2314 class Element {
2315 private:
2316 // The highest byte is the type of the argument. The remaining bytes contain the offset of the
2317 // field if it is flattened in the calling convention, -1 otherwise.
2318 juint _payload;
2319
2320 static constexpr int offset_bit_width = 24;
2321 static constexpr juint offset_bit_mask = (1 << offset_bit_width) - 1;
2322 public:
2323 Element(BasicType bt, int offset) : _payload((static_cast<juint>(bt) << offset_bit_width) | (juint(offset) & offset_bit_mask)) {
2324 assert(offset >= -1 && offset < jint(offset_bit_mask), "invalid offset %d", offset);
2325 }
2326
2327 BasicType bt() const {
2328 return static_cast<BasicType>(_payload >> offset_bit_width);
2329 }
2330
2331 int offset() const {
2332 juint res = _payload & offset_bit_mask;
2333 return res == offset_bit_mask ? -1 : res;
2334 }
2335
2336 juint hash() const {
2337 return _payload;
2338 }
2339
2340 bool operator!=(const Element& other) const {
2341 return _payload != other._payload;
2342 }
2343 };
2344
2345 private:
2346 const bool _has_ro_adapter;
2347 const int _length;
2348
2349 static int data_offset() { return sizeof(AdapterFingerPrint); }
2350 Element* data_pointer() {
2351 return reinterpret_cast<Element*>(reinterpret_cast<address>(this) + data_offset());
2352 }
2353
2354 const Element& element_at(int index) {
2355 assert(index < length(), "index %d out of bounds for length %d", index, length());
2356 Element* data = data_pointer();
2357 return data[index];
2358 }
2359
2360 // Private construtor. Use allocate() to get an instance.
2361 AdapterFingerPrint(const GrowableArray<SigEntry>* sig, bool has_ro_adapter)
2362 : _has_ro_adapter(has_ro_adapter), _length(total_args_passed_in_sig(sig)) {
2363 Element* data = data_pointer();
2364 BasicType prev_bt = T_ILLEGAL;
2365 int vt_count = 0;
2366 for (int index = 0; index < _length; index++) {
2367 const SigEntry& sig_entry = sig->at(index);
2368 BasicType bt = sig_entry._bt;
2369 if (bt == T_METADATA) {
2370 // Found start of inline type in signature
2371 assert(InlineTypePassFieldsAsArgs, "unexpected start of inline type");
2372 vt_count++;
2373 } else if (bt == T_VOID && prev_bt != T_LONG && prev_bt != T_DOUBLE) {
2374 // Found end of inline type in signature
2375 assert(InlineTypePassFieldsAsArgs, "unexpected end of inline type");
2376 vt_count--;
2377 assert(vt_count >= 0, "invalid vt_count");
2378 } else if (vt_count == 0) {
2379 // Widen fields that are not part of a scalarized inline type argument
2380 assert(sig_entry._offset == -1, "invalid offset for argument that is not a flattened field %d", sig_entry._offset);
2381 bt = adapter_encoding(bt);
2382 }
2383
2384 ::new(&data[index]) Element(bt, sig_entry._offset);
2385 prev_bt = bt;
2386 }
2387 assert(vt_count == 0, "invalid vt_count");
2388 }
2389
2390 // Call deallocate instead
2391 ~AdapterFingerPrint() {
2392 ShouldNotCallThis();
2393 }
2394
2395 static int total_args_passed_in_sig(const GrowableArray<SigEntry>* sig) {
2396 return (sig != nullptr) ? sig->length() : 0;
2397 }
2398
2399 static int compute_size_in_words(int len) {
2400 return (int)heap_word_size(sizeof(AdapterFingerPrint) + (len * sizeof(Element)));
2401 }
2402
2403 // Remap BasicTypes that are handled equivalently by the adapters.
2404 // These are correct for the current system but someday it might be
2405 // necessary to make this mapping platform dependent.
2406 static BasicType adapter_encoding(BasicType in) {
2407 switch (in) {
2408 case T_BOOLEAN:
2409 case T_BYTE:
2410 case T_SHORT:
2411 case T_CHAR:
2412 // They are all promoted to T_INT in the calling convention
2413 return T_INT;
2414
2415 case T_OBJECT:
2416 case T_ARRAY:
2417 // In other words, we assume that any register good enough for
2418 // an int or long is good enough for a managed pointer.
2419 #ifdef _LP64
2420 return T_LONG;
2421 #else
2422 return T_INT;
2423 #endif
2424
2425 case T_INT:
2426 case T_LONG:
2427 case T_FLOAT:
2428 case T_DOUBLE:
2429 case T_VOID:
2430 return in;
2431
2432 default:
2433 ShouldNotReachHere();
2434 return T_CONFLICT;
2435 }
2436 }
2437
2438 void* operator new(size_t size, size_t fp_size) throw() {
2439 assert(fp_size >= size, "sanity check");
2440 void* p = AllocateHeap(fp_size, mtCode);
2441 memset(p, 0, fp_size);
2442 return p;
2443 }
2444
2445 public:
2446 template<typename Function>
2447 void iterate_args(Function function) {
2448 for (int i = 0; i < length(); i++) {
2449 function(element_at(i));
2450 }
2451 }
2452
2453 static AdapterFingerPrint* allocate(const GrowableArray<SigEntry>* sig, bool has_ro_adapter = false) {
2454 int len = total_args_passed_in_sig(sig);
2455 int size_in_bytes = BytesPerWord * compute_size_in_words(len);
2456 AdapterFingerPrint* afp = new (size_in_bytes) AdapterFingerPrint(sig, has_ro_adapter);
2457 assert((afp->size() * BytesPerWord) == size_in_bytes, "should match");
2458 return afp;
2459 }
2460
2461 static void deallocate(AdapterFingerPrint* fp) {
2462 FreeHeap(fp);
2463 }
2464
2465 bool has_ro_adapter() const {
2466 return _has_ro_adapter;
2467 }
2468
2469 int length() const {
2470 return _length;
2471 }
2472
2473 unsigned int compute_hash() {
2474 int hash = 0;
2475 for (int i = 0; i < length(); i++) {
2476 const Element& v = element_at(i);
2477 //Add arithmetic operation to the hash, like +3 to improve hashing
2478 hash = ((hash << 8) ^ v.hash() ^ (hash >> 5)) + 3;
2479 }
2480 return (unsigned int)hash;
2481 }
2482
2483 const char* as_string() {
2484 stringStream st;
2485 st.print("{");
2486 if (_has_ro_adapter) {
2487 st.print("has_ro_adapter");
2488 } else {
2489 st.print("no_ro_adapter");
2490 }
2491 for (int i = 0; i < length(); i++) {
2492 st.print(", ");
2493 const Element& elem = element_at(i);
2494 st.print("{%s, %d}", type2name(elem.bt()), elem.offset());
2495 }
2496 st.print("}");
2497 return st.as_string();
2498 }
2499
2500 const char* as_basic_args_string() {
2501 stringStream st;
2502 bool long_prev = false;
2503 iterate_args([&] (const Element& arg) {
2504 if (long_prev) {
2505 long_prev = false;
2506 if (arg.bt() == T_VOID) {
2507 st.print("J");
2508 } else {
2509 st.print("L");
2510 }
2511 }
2512 if (arg.bt() == T_LONG) {
2513 long_prev = true;
2514 } else if (arg.bt() != T_VOID) {
2515 st.print("%c", type2char(arg.bt()));
2516 }
2517 });
2518 if (long_prev) {
2519 st.print("L");
2520 }
2521 return st.as_string();
2522 }
2523
2524 bool equals(AdapterFingerPrint* other) {
2525 if (other->_has_ro_adapter != _has_ro_adapter) {
2526 return false;
2527 } else if (other->_length != _length) {
2528 return false;
2529 } else {
2530 for (int i = 0; i < _length; i++) {
2531 if (element_at(i) != other->element_at(i)) {
2532 return false;
2533 }
2534 }
2535 }
2536 return true;
2537 }
2538
2539 // methods required by virtue of being a MetaspaceObj
2540 void metaspace_pointers_do(MetaspaceClosure* it) { return; /* nothing to do here */ }
2541 int size() const { return compute_size_in_words(_length); }
2542 MetaspaceObj::Type type() const { return AdapterFingerPrintType; }
2543
2544 static bool equals(AdapterFingerPrint* const& fp1, AdapterFingerPrint* const& fp2) {
2545 NOT_PRODUCT(_equals++);
2546 return fp1->equals(fp2);
2547 }
2548
2549 static unsigned int compute_hash(AdapterFingerPrint* const& fp) {
2550 return fp->compute_hash();
2551 }
2554 #if INCLUDE_CDS
2555 static inline bool adapter_fp_equals_compact_hashtable_entry(AdapterHandlerEntry* entry, AdapterFingerPrint* fp, int len_unused) {
2556 return AdapterFingerPrint::equals(entry->fingerprint(), fp);
2557 }
2558
2559 class ArchivedAdapterTable : public OffsetCompactHashtable<
2560 AdapterFingerPrint*,
2561 AdapterHandlerEntry*,
2562 adapter_fp_equals_compact_hashtable_entry> {};
2563 #endif // INCLUDE_CDS
2564
2565 // A hashtable mapping from AdapterFingerPrints to AdapterHandlerEntries
2566 using AdapterHandlerTable = HashTable<AdapterFingerPrint*, AdapterHandlerEntry*, 293,
2567 AnyObj::C_HEAP, mtCode,
2568 AdapterFingerPrint::compute_hash,
2569 AdapterFingerPrint::equals>;
2570 static AdapterHandlerTable* _adapter_handler_table;
2571 static GrowableArray<AdapterHandlerEntry*>* _adapter_handler_list = nullptr;
2572
2573 // Find a entry with the same fingerprint if it exists
2574 AdapterHandlerEntry* AdapterHandlerLibrary::lookup(const GrowableArray<SigEntry>* sig, bool has_ro_adapter) {
2575 NOT_PRODUCT(_lookups++);
2576 assert_lock_strong(AdapterHandlerLibrary_lock);
2577 AdapterFingerPrint* fp = AdapterFingerPrint::allocate(sig, has_ro_adapter);
2578 AdapterHandlerEntry* entry = nullptr;
2579 #if INCLUDE_CDS
2580 // if we are building the archive then the archived adapter table is
2581 // not valid and we need to use the ones added to the runtime table
2582 if (AOTCodeCache::is_using_adapter()) {
2583 // Search archived table first. It is read-only table so can be searched without lock
2584 entry = _aot_adapter_handler_table.lookup(fp, fp->compute_hash(), 0 /* unused */);
2585 #ifndef PRODUCT
2586 if (entry != nullptr) {
2587 _archived_hits++;
2588 }
2589 #endif
2590 }
2591 #endif // INCLUDE_CDS
2592 if (entry == nullptr) {
2593 assert_lock_strong(AdapterHandlerLibrary_lock);
2594 AdapterHandlerEntry** entry_p = _adapter_handler_table->get(fp);
2595 if (entry_p != nullptr) {
2596 entry = *entry_p;
2597 assert(entry->fingerprint()->equals(fp), "fingerprint mismatch key fp %s %s (hash=%d) != found fp %s %s (hash=%d)",
2614 TableStatistics ts = _adapter_handler_table->statistics_calculate(size);
2615 ts.print(tty, "AdapterHandlerTable");
2616 tty->print_cr("AdapterHandlerTable (table_size=%d, entries=%d)",
2617 _adapter_handler_table->table_size(), _adapter_handler_table->number_of_entries());
2618 int total_hits = _archived_hits + _runtime_hits;
2619 tty->print_cr("AdapterHandlerTable: lookups %d equals %d hits %d (archived=%d+runtime=%d)",
2620 _lookups, _equals, total_hits, _archived_hits, _runtime_hits);
2621 }
2622 #endif
2623
2624 // ---------------------------------------------------------------------------
2625 // Implementation of AdapterHandlerLibrary
2626 AdapterHandlerEntry* AdapterHandlerLibrary::_no_arg_handler = nullptr;
2627 AdapterHandlerEntry* AdapterHandlerLibrary::_int_arg_handler = nullptr;
2628 AdapterHandlerEntry* AdapterHandlerLibrary::_obj_arg_handler = nullptr;
2629 AdapterHandlerEntry* AdapterHandlerLibrary::_obj_int_arg_handler = nullptr;
2630 AdapterHandlerEntry* AdapterHandlerLibrary::_obj_obj_arg_handler = nullptr;
2631 #if INCLUDE_CDS
2632 ArchivedAdapterTable AdapterHandlerLibrary::_aot_adapter_handler_table;
2633 #endif // INCLUDE_CDS
2634 static const int AdapterHandlerLibrary_size = 48*K;
2635 BufferBlob* AdapterHandlerLibrary::_buffer = nullptr;
2636 volatile uint AdapterHandlerLibrary::_id_counter = 0;
2637
2638 BufferBlob* AdapterHandlerLibrary::buffer_blob() {
2639 assert(_buffer != nullptr, "should be initialized");
2640 return _buffer;
2641 }
2642
2643 static void post_adapter_creation(const AdapterHandlerEntry* entry) {
2644 if (Forte::is_enabled() || JvmtiExport::should_post_dynamic_code_generated()) {
2645 AdapterBlob* adapter_blob = entry->adapter_blob();
2646 char blob_id[256];
2647 jio_snprintf(blob_id,
2648 sizeof(blob_id),
2649 "%s(%s)",
2650 adapter_blob->name(),
2651 entry->fingerprint()->as_string());
2652 if (Forte::is_enabled()) {
2653 Forte::register_stub(blob_id, adapter_blob->content_begin(), adapter_blob->content_end());
2654 }
2662 void AdapterHandlerLibrary::initialize() {
2663 {
2664 ResourceMark rm;
2665 _adapter_handler_table = new (mtCode) AdapterHandlerTable();
2666 _buffer = BufferBlob::create("adapters", AdapterHandlerLibrary_size);
2667 }
2668
2669 #if INCLUDE_CDS
2670 // Link adapters in AOT Cache to their code in AOT Code Cache
2671 if (AOTCodeCache::is_using_adapter() && !_aot_adapter_handler_table.empty()) {
2672 link_aot_adapters();
2673 lookup_simple_adapters();
2674 return;
2675 }
2676 #endif // INCLUDE_CDS
2677
2678 ResourceMark rm;
2679 {
2680 MutexLocker mu(AdapterHandlerLibrary_lock);
2681
2682 CompiledEntrySignature no_args;
2683 no_args.compute_calling_conventions();
2684 _no_arg_handler = create_adapter(no_args, true);
2685
2686 CompiledEntrySignature obj_args;
2687 SigEntry::add_entry(obj_args.sig(), T_OBJECT);
2688 obj_args.compute_calling_conventions();
2689 _obj_arg_handler = create_adapter(obj_args, true);
2690
2691 CompiledEntrySignature int_args;
2692 SigEntry::add_entry(int_args.sig(), T_INT);
2693 int_args.compute_calling_conventions();
2694 _int_arg_handler = create_adapter(int_args, true);
2695
2696 CompiledEntrySignature obj_int_args;
2697 SigEntry::add_entry(obj_int_args.sig(), T_OBJECT);
2698 SigEntry::add_entry(obj_int_args.sig(), T_INT);
2699 obj_int_args.compute_calling_conventions();
2700 _obj_int_arg_handler = create_adapter(obj_int_args, true);
2701
2702 CompiledEntrySignature obj_obj_args;
2703 SigEntry::add_entry(obj_obj_args.sig(), T_OBJECT);
2704 SigEntry::add_entry(obj_obj_args.sig(), T_OBJECT);
2705 obj_obj_args.compute_calling_conventions();
2706 _obj_obj_arg_handler = create_adapter(obj_obj_args, true);
2707
2708 // we should always get an entry back but we don't have any
2709 // associated blob on Zero
2710 assert(_no_arg_handler != nullptr &&
2711 _obj_arg_handler != nullptr &&
2712 _int_arg_handler != nullptr &&
2713 _obj_int_arg_handler != nullptr &&
2714 _obj_obj_arg_handler != nullptr, "Initial adapter handlers must be properly created");
2715 }
2716
2717 // Outside of the lock
2718 #ifndef ZERO
2719 // no blobs to register when we are on Zero
2720 post_adapter_creation(_no_arg_handler);
2721 post_adapter_creation(_obj_arg_handler);
2722 post_adapter_creation(_int_arg_handler);
2723 post_adapter_creation(_obj_int_arg_handler);
2724 post_adapter_creation(_obj_obj_arg_handler);
2725 #endif // ZERO
2726 }
2727
2728 AdapterHandlerEntry* AdapterHandlerLibrary::new_entry(AdapterFingerPrint* fingerprint) {
2729 uint id = (uint)AtomicAccess::add((int*)&_id_counter, 1);
2730 assert(id > 0, "we can never overflow because AOT cache cannot contain more than 2^32 methods");
2731 return AdapterHandlerEntry::allocate(id, fingerprint);
2732 }
2733
2734 AdapterHandlerEntry* AdapterHandlerLibrary::get_simple_adapter(const methodHandle& method) {
2735 int total_args_passed = method->size_of_parameters(); // All args on stack
2736 if (total_args_passed == 0) {
2737 return _no_arg_handler;
2738 } else if (total_args_passed == 1) {
2739 if (!method->is_static()) {
2740 if (InlineTypePassFieldsAsArgs && method->method_holder()->is_inline_klass()) {
2741 return nullptr;
2742 }
2743 return _obj_arg_handler;
2744 }
2745 switch (method->signature()->char_at(1)) {
2746 case JVM_SIGNATURE_CLASS: {
2747 if (InlineTypePassFieldsAsArgs) {
2748 SignatureStream ss(method->signature());
2749 InlineKlass* vk = ss.as_inline_klass(method->method_holder());
2750 if (vk != nullptr) {
2751 return nullptr;
2752 }
2753 }
2754 return _obj_arg_handler;
2755 }
2756 case JVM_SIGNATURE_ARRAY:
2757 return _obj_arg_handler;
2758 case JVM_SIGNATURE_INT:
2759 case JVM_SIGNATURE_BOOLEAN:
2760 case JVM_SIGNATURE_CHAR:
2761 case JVM_SIGNATURE_BYTE:
2762 case JVM_SIGNATURE_SHORT:
2763 return _int_arg_handler;
2764 }
2765 } else if (total_args_passed == 2 &&
2766 !method->is_static() && (!InlineTypePassFieldsAsArgs || !method->method_holder()->is_inline_klass())) {
2767 switch (method->signature()->char_at(1)) {
2768 case JVM_SIGNATURE_CLASS: {
2769 if (InlineTypePassFieldsAsArgs) {
2770 SignatureStream ss(method->signature());
2771 InlineKlass* vk = ss.as_inline_klass(method->method_holder());
2772 if (vk != nullptr) {
2773 return nullptr;
2774 }
2775 }
2776 return _obj_obj_arg_handler;
2777 }
2778 case JVM_SIGNATURE_ARRAY:
2779 return _obj_obj_arg_handler;
2780 case JVM_SIGNATURE_INT:
2781 case JVM_SIGNATURE_BOOLEAN:
2782 case JVM_SIGNATURE_CHAR:
2783 case JVM_SIGNATURE_BYTE:
2784 case JVM_SIGNATURE_SHORT:
2785 return _obj_int_arg_handler;
2786 }
2787 }
2788 return nullptr;
2789 }
2790
2791 CompiledEntrySignature::CompiledEntrySignature(Method* method) :
2792 _method(method), _num_inline_args(0), _has_inline_recv(false),
2793 _regs(nullptr), _regs_cc(nullptr), _regs_cc_ro(nullptr),
2794 _args_on_stack(0), _args_on_stack_cc(0), _args_on_stack_cc_ro(0),
2795 _c1_needs_stack_repair(false), _c2_needs_stack_repair(false), _supers(nullptr) {
2796 _sig = new GrowableArray<SigEntry>((method != nullptr) ? method->size_of_parameters() : 1);
2797 _sig_cc = new GrowableArray<SigEntry>((method != nullptr) ? method->size_of_parameters() : 1);
2798 _sig_cc_ro = new GrowableArray<SigEntry>((method != nullptr) ? method->size_of_parameters() : 1);
2799 }
2800
2801 // See if we can save space by sharing the same entry for VIEP and VIEP(RO),
2802 // or the same entry for VEP and VIEP(RO).
2803 CodeOffsets::Entries CompiledEntrySignature::c1_inline_ro_entry_type() const {
2804 if (!has_scalarized_args()) {
2805 // VEP/VIEP/VIEP(RO) all share the same entry. There's no packing.
2806 return CodeOffsets::Verified_Entry;
2807 }
2808 if (_method->is_static()) {
2809 // Static methods don't need VIEP(RO)
2810 return CodeOffsets::Verified_Entry;
2811 }
2812
2813 if (has_inline_recv()) {
2814 if (num_inline_args() == 1) {
2815 // Share same entry for VIEP and VIEP(RO).
2816 // This is quite common: we have an instance method in an InlineKlass that has
2817 // no inline type args other than <this>.
2818 return CodeOffsets::Verified_Inline_Entry;
2819 } else {
2820 assert(num_inline_args() > 1, "must be");
2821 // No sharing:
2822 // VIEP(RO) -- <this> is passed as object
2823 // VEP -- <this> is passed as fields
2824 return CodeOffsets::Verified_Inline_Entry_RO;
2825 }
2826 }
2827
2828 // Either a static method, or <this> is not an inline type
2829 if (args_on_stack_cc() != args_on_stack_cc_ro()) {
2830 // No sharing:
2831 // Some arguments are passed on the stack, and we have inserted reserved entries
2832 // into the VEP, but we never insert reserved entries into the VIEP(RO).
2833 return CodeOffsets::Verified_Inline_Entry_RO;
2834 } else {
2835 // Share same entry for VEP and VIEP(RO).
2836 return CodeOffsets::Verified_Entry;
2837 }
2838 }
2839
2840 // Returns all super methods (transitive) in classes and interfaces that are overridden by the current method.
2841 GrowableArray<Method*>* CompiledEntrySignature::get_supers() {
2842 if (_supers != nullptr) {
2843 return _supers;
2844 }
2845 _supers = new GrowableArray<Method*>();
2846 // Skip private, static, and <init> methods
2847 if (_method->is_private() || _method->is_static() || _method->is_object_constructor()) {
2848 return _supers;
2849 }
2850 Symbol* name = _method->name();
2851 Symbol* signature = _method->signature();
2852 const Klass* holder = _method->method_holder()->super();
2853 Symbol* holder_name = holder->name();
2854 ThreadInVMfromUnknown tiv;
2855 JavaThread* current = JavaThread::current();
2856 HandleMark hm(current);
2857 Handle loader(current, _method->method_holder()->class_loader());
2858
2859 // Walk up the class hierarchy and search for super methods
2860 while (holder != nullptr) {
2861 Method* super_method = holder->lookup_method(name, signature);
2862 if (super_method == nullptr) {
2863 break;
2864 }
2865 if (!super_method->is_static() && !super_method->is_private() &&
2866 (!super_method->is_package_private() ||
2867 super_method->method_holder()->is_same_class_package(loader(), holder_name))) {
2868 _supers->push(super_method);
2869 }
2870 holder = super_method->method_holder()->super();
2871 }
2872 // Search interfaces for super methods
2873 Array<InstanceKlass*>* interfaces = _method->method_holder()->transitive_interfaces();
2874 for (int i = 0; i < interfaces->length(); ++i) {
2875 Method* m = interfaces->at(i)->lookup_method(name, signature);
2876 if (m != nullptr && !m->is_static() && m->is_public()) {
2877 _supers->push(m);
2878 }
2879 }
2880 return _supers;
2881 }
2882
2883 // Iterate over arguments and compute scalarized and non-scalarized signatures
2884 void CompiledEntrySignature::compute_calling_conventions(bool init) {
2885 bool has_scalarized = false;
2886 if (_method != nullptr) {
2887 InstanceKlass* holder = _method->method_holder();
2888 int arg_num = 0;
2889 if (!_method->is_static()) {
2890 // We shouldn't scalarize 'this' in a value class constructor
2891 if (holder->is_inline_klass() && InlineKlass::cast(holder)->can_be_passed_as_fields() && !_method->is_object_constructor() &&
2892 (init || _method->is_scalarized_arg(arg_num))) {
2893 _sig_cc->appendAll(InlineKlass::cast(holder)->extended_sig());
2894 has_scalarized = true;
2895 _has_inline_recv = true;
2896 _num_inline_args++;
2897 } else {
2898 SigEntry::add_entry(_sig_cc, T_OBJECT, holder->name());
2899 }
2900 SigEntry::add_entry(_sig, T_OBJECT, holder->name());
2901 SigEntry::add_entry(_sig_cc_ro, T_OBJECT, holder->name());
2902 arg_num++;
2903 }
2904 for (SignatureStream ss(_method->signature()); !ss.at_return_type(); ss.next()) {
2905 BasicType bt = ss.type();
2906 if (bt == T_OBJECT) {
2907 InlineKlass* vk = ss.as_inline_klass(holder);
2908 if (vk != nullptr && vk->can_be_passed_as_fields() && (init || _method->is_scalarized_arg(arg_num))) {
2909 // Check for a calling convention mismatch with super method(s)
2910 bool scalar_super = false;
2911 bool non_scalar_super = false;
2912 GrowableArray<Method*>* supers = get_supers();
2913 for (int i = 0; i < supers->length(); ++i) {
2914 Method* super_method = supers->at(i);
2915 if (AOTCodeCache::is_using_adapter() && super_method->adapter()->get_sig_cc() == nullptr) {
2916 // Calling conventions have to be regenerated at runtime and are accessed through method adapters,
2917 // which are archived in the AOT code cache. If the adapters are not regenerated, the
2918 // calling conventions should be regenerated here.
2919 CompiledEntrySignature ces(super_method);
2920 ces.compute_calling_conventions();
2921 if (ces.has_scalarized_args()) {
2922 // Save a C heap allocated version of the scalarized signature and store it in the adapter
2923 GrowableArray<SigEntry>* heap_sig = new (mtInternal) GrowableArray<SigEntry>(ces.sig_cc()->length(), mtInternal);
2924 heap_sig->appendAll(ces.sig_cc());
2925 super_method->adapter()->set_sig_cc(heap_sig);
2926 }
2927 }
2928 if (super_method->is_scalarized_arg(arg_num)) {
2929 scalar_super = true;
2930 } else {
2931 non_scalar_super = true;
2932 }
2933 }
2934 #ifdef ASSERT
2935 // Randomly enable below code paths for stress testing
2936 bool stress = init && StressCallingConvention;
2937 if (stress && (os::random() & 1) == 1) {
2938 non_scalar_super = true;
2939 if ((os::random() & 1) == 1) {
2940 scalar_super = true;
2941 }
2942 }
2943 #endif
2944 if (non_scalar_super) {
2945 // Found a super method with a non-scalarized argument. Fall back to the non-scalarized calling convention.
2946 if (scalar_super) {
2947 // Found non-scalar *and* scalar super methods. We can't handle both.
2948 // Mark the scalar method as mismatch and re-compile call sites to use non-scalarized calling convention.
2949 for (int i = 0; i < supers->length(); ++i) {
2950 Method* super_method = supers->at(i);
2951 if (super_method->is_scalarized_arg(arg_num) DEBUG_ONLY(|| (stress && (os::random() & 1) == 1))) {
2952 super_method->set_mismatch();
2953 MutexLocker ml(Compile_lock, Mutex::_safepoint_check_flag);
2954 JavaThread* thread = JavaThread::current();
2955 HandleMark hm(thread);
2956 methodHandle mh(thread, super_method);
2957 DeoptimizationScope deopt_scope;
2958 CodeCache::mark_for_deoptimization(&deopt_scope, mh());
2959 deopt_scope.deoptimize_marked();
2960 }
2961 }
2962 }
2963 // Fall back to non-scalarized calling convention
2964 SigEntry::add_entry(_sig_cc, T_OBJECT, ss.as_symbol());
2965 SigEntry::add_entry(_sig_cc_ro, T_OBJECT, ss.as_symbol());
2966 } else {
2967 _num_inline_args++;
2968 has_scalarized = true;
2969 int last = _sig_cc->length();
2970 int last_ro = _sig_cc_ro->length();
2971 _sig_cc->appendAll(vk->extended_sig());
2972 _sig_cc_ro->appendAll(vk->extended_sig());
2973 if (bt == T_OBJECT) {
2974 // Nullable inline type argument, insert InlineTypeNode::NullMarker field right after T_METADATA delimiter
2975 _sig_cc->insert_before(last+1, SigEntry(T_BOOLEAN, -1, nullptr, true));
2976 _sig_cc_ro->insert_before(last_ro+1, SigEntry(T_BOOLEAN, -1, nullptr, true));
2977 }
2978 }
2979 } else {
2980 SigEntry::add_entry(_sig_cc, T_OBJECT, ss.as_symbol());
2981 SigEntry::add_entry(_sig_cc_ro, T_OBJECT, ss.as_symbol());
2982 }
2983 bt = T_OBJECT;
2984 } else {
2985 SigEntry::add_entry(_sig_cc, ss.type(), ss.as_symbol());
2986 SigEntry::add_entry(_sig_cc_ro, ss.type(), ss.as_symbol());
2987 }
2988 SigEntry::add_entry(_sig, bt, ss.as_symbol());
2989 if (bt != T_VOID) {
2990 arg_num++;
2991 }
2992 }
2993 }
2994
2995 // Compute the non-scalarized calling convention
2996 _regs = NEW_RESOURCE_ARRAY(VMRegPair, _sig->length());
2997 _args_on_stack = SharedRuntime::java_calling_convention(_sig, _regs);
2998
2999 // Compute the scalarized calling conventions if there are scalarized inline types in the signature
3000 if (has_scalarized && !_method->is_native()) {
3001 _regs_cc = NEW_RESOURCE_ARRAY(VMRegPair, _sig_cc->length());
3002 _args_on_stack_cc = SharedRuntime::java_calling_convention(_sig_cc, _regs_cc);
3003
3004 _regs_cc_ro = NEW_RESOURCE_ARRAY(VMRegPair, _sig_cc_ro->length());
3005 _args_on_stack_cc_ro = SharedRuntime::java_calling_convention(_sig_cc_ro, _regs_cc_ro);
3006
3007 _c1_needs_stack_repair = (_args_on_stack_cc < _args_on_stack) || (_args_on_stack_cc_ro < _args_on_stack);
3008 _c2_needs_stack_repair = (_args_on_stack_cc > _args_on_stack) || (_args_on_stack_cc > _args_on_stack_cc_ro);
3009
3010 // Upper bound on stack arguments to avoid hitting the argument limit and
3011 // bailing out of compilation ("unsupported incoming calling sequence").
3012 // TODO we need a reasonable limit (flag?) here
3013 if (MAX2(_args_on_stack_cc, _args_on_stack_cc_ro) <= 60) {
3014 return; // Success
3015 }
3016 }
3017
3018 // No scalarized args
3019 _sig_cc = _sig;
3020 _regs_cc = _regs;
3021 _args_on_stack_cc = _args_on_stack;
3022
3023 _sig_cc_ro = _sig;
3024 _regs_cc_ro = _regs;
3025 _args_on_stack_cc_ro = _args_on_stack;
3026 }
3027
3028 void CompiledEntrySignature::initialize_from_fingerprint(AdapterFingerPrint* fingerprint) {
3029 _has_inline_recv = fingerprint->has_ro_adapter();
3030
3031 int value_object_count = 0;
3032 BasicType prev_bt = T_ILLEGAL;
3033 bool has_scalarized_arguments = false;
3034 bool long_prev = false;
3035 int long_prev_offset = -1;
3036
3037 fingerprint->iterate_args([&] (const AdapterFingerPrint::Element& arg) {
3038 BasicType bt = arg.bt();
3039 int offset = arg.offset();
3040
3041 if (long_prev) {
3042 long_prev = false;
3043 BasicType bt_to_add;
3044 if (bt == T_VOID) {
3045 bt_to_add = T_LONG;
3046 } else {
3047 bt_to_add = T_OBJECT;
3048 }
3049 if (value_object_count == 0) {
3050 SigEntry::add_entry(_sig, bt_to_add);
3051 }
3052 SigEntry::add_entry(_sig_cc, bt_to_add, nullptr, long_prev_offset);
3053 SigEntry::add_entry(_sig_cc_ro, bt_to_add, nullptr, long_prev_offset);
3054 }
3055
3056 switch (bt) {
3057 case T_VOID:
3058 if (prev_bt != T_LONG && prev_bt != T_DOUBLE) {
3059 assert(InlineTypePassFieldsAsArgs, "unexpected end of inline type");
3060 value_object_count--;
3061 SigEntry::add_entry(_sig_cc, T_VOID, nullptr, offset);
3062 SigEntry::add_entry(_sig_cc_ro, T_VOID, nullptr, offset);
3063 assert(value_object_count >= 0, "invalid value object count");
3064 } else {
3065 // Nothing to add for _sig: We already added an addition T_VOID in add_entry() when adding T_LONG or T_DOUBLE.
3066 }
3067 break;
3068 case T_INT:
3069 case T_FLOAT:
3070 case T_DOUBLE:
3071 if (value_object_count == 0) {
3072 SigEntry::add_entry(_sig, bt);
3073 }
3074 SigEntry::add_entry(_sig_cc, bt, nullptr, offset);
3075 SigEntry::add_entry(_sig_cc_ro, bt, nullptr, offset);
3076 break;
3077 case T_LONG:
3078 long_prev = true;
3079 long_prev_offset = offset;
3080 break;
3081 case T_BOOLEAN:
3082 case T_CHAR:
3083 case T_BYTE:
3084 case T_SHORT:
3085 case T_OBJECT:
3086 case T_ARRAY:
3087 assert(value_object_count > 0, "must be value object field");
3088 SigEntry::add_entry(_sig_cc, bt, nullptr, offset);
3089 SigEntry::add_entry(_sig_cc_ro, bt, nullptr, offset);
3090 break;
3091 case T_METADATA:
3092 assert(InlineTypePassFieldsAsArgs, "unexpected start of inline type");
3093 if (value_object_count == 0) {
3094 SigEntry::add_entry(_sig, T_OBJECT);
3095 }
3096 SigEntry::add_entry(_sig_cc, T_METADATA, nullptr, offset);
3097 SigEntry::add_entry(_sig_cc_ro, T_METADATA, nullptr, offset);
3098 value_object_count++;
3099 has_scalarized_arguments = true;
3100 break;
3101 default: {
3102 fatal("Unexpected BasicType: %s", basictype_to_str(bt));
3103 }
3104 }
3105 prev_bt = bt;
3106 });
3107
3108 if (long_prev) {
3109 // If previous bt was T_LONG and we reached the end of the signature, we know that it must be a T_OBJECT.
3110 SigEntry::add_entry(_sig, T_OBJECT);
3111 SigEntry::add_entry(_sig_cc, T_OBJECT);
3112 SigEntry::add_entry(_sig_cc_ro, T_OBJECT);
3113 }
3114 assert(value_object_count == 0, "invalid value object count");
3115
3116 _regs = NEW_RESOURCE_ARRAY(VMRegPair, _sig->length());
3117 _args_on_stack = SharedRuntime::java_calling_convention(_sig, _regs);
3118
3119 // Compute the scalarized calling conventions if there are scalarized inline types in the signature
3120 if (has_scalarized_arguments) {
3121 _regs_cc = NEW_RESOURCE_ARRAY(VMRegPair, _sig_cc->length());
3122 _args_on_stack_cc = SharedRuntime::java_calling_convention(_sig_cc, _regs_cc);
3123
3124 _regs_cc_ro = NEW_RESOURCE_ARRAY(VMRegPair, _sig_cc_ro->length());
3125 _args_on_stack_cc_ro = SharedRuntime::java_calling_convention(_sig_cc_ro, _regs_cc_ro);
3126
3127 _c1_needs_stack_repair = (_args_on_stack_cc < _args_on_stack) || (_args_on_stack_cc_ro < _args_on_stack);
3128 _c2_needs_stack_repair = (_args_on_stack_cc > _args_on_stack) || (_args_on_stack_cc > _args_on_stack_cc_ro);
3129 } else {
3130 // No scalarized args
3131 _sig_cc = _sig;
3132 _regs_cc = _regs;
3133 _args_on_stack_cc = _args_on_stack;
3134
3135 _sig_cc_ro = _sig;
3136 _regs_cc_ro = _regs;
3137 _args_on_stack_cc_ro = _args_on_stack;
3138 }
3139
3140 #ifdef ASSERT
3141 {
3142 AdapterFingerPrint* compare_fp = AdapterFingerPrint::allocate(_sig_cc, _has_inline_recv);
3143 assert(fingerprint->equals(compare_fp), "%s - %s", fingerprint->as_string(), compare_fp->as_string());
3144 AdapterFingerPrint::deallocate(compare_fp);
3145 }
3146 #endif
3147 }
3148
3149 const char* AdapterHandlerEntry::_entry_names[] = {
3150 "i2c", "c2i", "c2i_unverified", "c2i_no_clinit_check"
3151 };
3152
3153 #ifdef ASSERT
3154 void AdapterHandlerLibrary::verify_adapter_sharing(CompiledEntrySignature& ces, AdapterHandlerEntry* cached_entry) {
3155 // we can only check for the same code if there is any
3156 #ifndef ZERO
3157 AdapterHandlerEntry* comparison_entry = create_adapter(ces, false, true);
3158 assert(comparison_entry->adapter_blob() == nullptr, "no blob should be created when creating an adapter for comparison");
3159 assert(comparison_entry->compare_code(cached_entry), "code must match");
3160 // Release the one just created
3161 AdapterHandlerEntry::deallocate(comparison_entry);
3162 # endif // ZERO
3163 }
3164 #endif /* ASSERT*/
3165
3166 AdapterHandlerEntry* AdapterHandlerLibrary::get_adapter(const methodHandle& method) {
3167 assert(!method->is_abstract(), "abstract methods do not have adapters");
3168 // Use customized signature handler. Need to lock around updates to
3169 // the _adapter_handler_table (it is not safe for concurrent readers
3170 // and a single writer: this could be fixed if it becomes a
3171 // problem).
3172
3173 // Fast-path for trivial adapters
3174 AdapterHandlerEntry* entry = get_simple_adapter(method);
3175 if (entry != nullptr) {
3176 return entry;
3177 }
3178
3179 ResourceMark rm;
3180 bool new_entry = false;
3181
3182 CompiledEntrySignature ces(method());
3183 ces.compute_calling_conventions();
3184 if (ces.has_scalarized_args()) {
3185 if (!method->has_scalarized_args()) {
3186 method->set_has_scalarized_args();
3187 }
3188 if (ces.c1_needs_stack_repair()) {
3189 method->set_c1_needs_stack_repair();
3190 }
3191 if (ces.c2_needs_stack_repair() && !method->c2_needs_stack_repair()) {
3192 method->set_c2_needs_stack_repair();
3193 }
3194 }
3195
3196 {
3197 MutexLocker mu(AdapterHandlerLibrary_lock);
3198
3199 // Lookup method signature's fingerprint
3200 entry = lookup(ces.sig_cc(), ces.has_inline_recv());
3201
3202 if (entry != nullptr) {
3203 #ifndef ZERO
3204 assert(entry->is_linked(), "AdapterHandlerEntry must have been linked");
3205 #endif
3206 #ifdef ASSERT
3207 if (!entry->in_aot_cache() && VerifyAdapterSharing) {
3208 verify_adapter_sharing(ces, entry);
3209 }
3210 #endif
3211 } else {
3212 entry = create_adapter(ces, /* allocate_code_blob */ true);
3213 if (entry != nullptr) {
3214 new_entry = true;
3215 }
3216 }
3217 }
3218
3219 // Outside of the lock
3220 if (new_entry) {
3221 post_adapter_creation(entry);
3222 }
3223 return entry;
3224 }
3225
3226 void AdapterHandlerLibrary::lookup_aot_cache(AdapterHandlerEntry* handler) {
3227 ResourceMark rm;
3228 const char* name = AdapterHandlerLibrary::name(handler);
3229 const uint32_t id = AdapterHandlerLibrary::id(handler);
3230
3231 CodeBlob* blob = AOTCodeCache::load_code_blob(AOTCodeEntry::Adapter, id, name);
3232 if (blob != nullptr) {
3247 }
3248 insts_size = adapter_blob->code_size();
3249 st->print_cr("i2c argument handler for: %s %s (%d bytes generated)",
3250 handler->fingerprint()->as_basic_args_string(),
3251 handler->fingerprint()->as_string(), insts_size);
3252 st->print_cr("c2i argument handler starts at " INTPTR_FORMAT, p2i(handler->get_c2i_entry()));
3253 if (Verbose || PrintStubCode) {
3254 address first_pc = adapter_blob->content_begin();
3255 if (first_pc != nullptr) {
3256 Disassembler::decode(first_pc, first_pc + insts_size, st, &adapter_blob->asm_remarks());
3257 st->cr();
3258 }
3259 }
3260 }
3261 #endif // PRODUCT
3262
3263 void AdapterHandlerLibrary::address_to_offset(address entry_address[AdapterBlob::ENTRY_COUNT],
3264 int entry_offset[AdapterBlob::ENTRY_COUNT]) {
3265 entry_offset[AdapterBlob::I2C] = 0;
3266 entry_offset[AdapterBlob::C2I] = entry_address[AdapterBlob::C2I] - entry_address[AdapterBlob::I2C];
3267 entry_offset[AdapterBlob::C2I_Inline] = entry_address[AdapterBlob::C2I_Inline] - entry_address[AdapterBlob::I2C];
3268 entry_offset[AdapterBlob::C2I_Inline_RO] = entry_address[AdapterBlob::C2I_Inline_RO] - entry_address[AdapterBlob::I2C];
3269 entry_offset[AdapterBlob::C2I_Unverified] = entry_address[AdapterBlob::C2I_Unverified] - entry_address[AdapterBlob::I2C];
3270 entry_offset[AdapterBlob::C2I_Unverified_Inline] = entry_address[AdapterBlob::C2I_Unverified_Inline] - entry_address[AdapterBlob::I2C];
3271 if (entry_address[AdapterBlob::C2I_No_Clinit_Check] == nullptr) {
3272 entry_offset[AdapterBlob::C2I_No_Clinit_Check] = -1;
3273 } else {
3274 entry_offset[AdapterBlob::C2I_No_Clinit_Check] = entry_address[AdapterBlob::C2I_No_Clinit_Check] - entry_address[AdapterBlob::I2C];
3275 }
3276 }
3277
3278 bool AdapterHandlerLibrary::generate_adapter_code(AdapterHandlerEntry* handler,
3279 CompiledEntrySignature& ces,
3280 bool allocate_code_blob,
3281 bool is_transient) {
3282 if (log_is_enabled(Info, perf, class, link)) {
3283 ClassLoader::perf_method_adapters_count()->inc();
3284 }
3285
3286 #ifndef ZERO
3287 AdapterBlob* adapter_blob = nullptr;
3288 BufferBlob* buf = buffer_blob(); // the temporary code buffer in CodeCache
3289 CodeBuffer buffer(buf);
3290 short buffer_locs[20];
3291 buffer.insts()->initialize_shared_locs((relocInfo*)buffer_locs,
3292 sizeof(buffer_locs)/sizeof(relocInfo));
3293 MacroAssembler masm(&buffer);
3294 address entry_address[AdapterBlob::ENTRY_COUNT];
3295
3296 // Get a description of the compiled java calling convention and the largest used (VMReg) stack slot usage
3297 SharedRuntime::generate_i2c2i_adapters(&masm,
3298 ces.args_on_stack(),
3299 ces.sig(),
3300 ces.regs(),
3301 ces.sig_cc(),
3302 ces.regs_cc(),
3303 ces.sig_cc_ro(),
3304 ces.regs_cc_ro(),
3305 entry_address,
3306 adapter_blob,
3307 allocate_code_blob);
3308
3309 if (ces.has_scalarized_args()) {
3310 // Save a C heap allocated version of the scalarized signature and store it in the adapter
3311 GrowableArray<SigEntry>* heap_sig = new (mtInternal) GrowableArray<SigEntry>(ces.sig_cc()->length(), mtInternal);
3312 heap_sig->appendAll(ces.sig_cc());
3313 handler->set_sig_cc(heap_sig);
3314 }
3315 // On zero there is no code to save and no need to create a blob and
3316 // or relocate the handler.
3317 int entry_offset[AdapterBlob::ENTRY_COUNT];
3318 address_to_offset(entry_address, entry_offset);
3319 #ifdef ASSERT
3320 if (VerifyAdapterSharing) {
3321 handler->save_code(buf->code_begin(), buffer.insts_size());
3322 if (is_transient) {
3323 return true;
3324 }
3325 }
3326 #endif
3327 if (adapter_blob == nullptr) {
3328 // CodeCache is full, disable compilation
3329 // Ought to log this but compile log is only per compile thread
3330 // and we're some non descript Java thread.
3331 return false;
3332 }
3333 handler->set_adapter_blob(adapter_blob);
3334 if (!is_transient && AOTCodeCache::is_dumping_adapter()) {
3335 // try to save generated code
3336 const char* name = AdapterHandlerLibrary::name(handler);
3337 const uint32_t id = AdapterHandlerLibrary::id(handler);
3338 bool success = AOTCodeCache::store_code_blob(*adapter_blob, AOTCodeEntry::Adapter, id, name);
3339 assert(success || !AOTCodeCache::is_dumping_adapter(), "caching of adapter must be disabled");
3340 }
3341 #endif // ZERO
3342
3343 #ifndef PRODUCT
3344 // debugging support
3345 if (PrintAdapterHandlers || PrintStubCode) {
3346 print_adapter_handler_info(tty, handler);
3347 }
3348 #endif
3349
3350 return true;
3351 }
3352
3353 AdapterHandlerEntry* AdapterHandlerLibrary::create_adapter(CompiledEntrySignature& ces,
3354 bool allocate_code_blob,
3355 bool is_transient) {
3356 AdapterFingerPrint* fp = AdapterFingerPrint::allocate(ces.sig_cc(), ces.has_inline_recv());
3357 #ifdef ASSERT
3358 // Verify that we can successfully restore the compiled entry signature object.
3359 CompiledEntrySignature ces_verify;
3360 ces_verify.initialize_from_fingerprint(fp);
3361 #endif
3362 AdapterHandlerEntry* handler = AdapterHandlerLibrary::new_entry(fp);
3363 if (!generate_adapter_code(handler, ces, allocate_code_blob, is_transient)) {
3364 AdapterHandlerEntry::deallocate(handler);
3365 return nullptr;
3366 }
3367 if (!is_transient) {
3368 assert_lock_strong(AdapterHandlerLibrary_lock);
3369 _adapter_handler_table->put(fp, handler);
3370 }
3371 return handler;
3372 }
3373
3374 #if INCLUDE_CDS
3375 void AdapterHandlerEntry::remove_unshareable_info() {
3376 #ifdef ASSERT
3377 _saved_code = nullptr;
3378 _saved_code_length = 0;
3379 #endif // ASSERT
3380 _adapter_blob = nullptr;
3381 _linked = false;
3382 _sig_cc = nullptr;
3383 }
3384
3385 class CopyAdapterTableToArchive : StackObj {
3386 private:
3387 CompactHashtableWriter* _writer;
3388 ArchiveBuilder* _builder;
3389 public:
3390 CopyAdapterTableToArchive(CompactHashtableWriter* writer) : _writer(writer),
3391 _builder(ArchiveBuilder::current())
3392 {}
3393
3394 bool do_entry(AdapterFingerPrint* fp, AdapterHandlerEntry* entry) {
3395 LogStreamHandle(Trace, aot) lsh;
3396 if (ArchiveBuilder::current()->has_been_archived((address)entry)) {
3397 assert(ArchiveBuilder::current()->has_been_archived((address)fp), "must be");
3398 AdapterFingerPrint* buffered_fp = ArchiveBuilder::current()->get_buffered_addr(fp);
3399 assert(buffered_fp != nullptr,"sanity check");
3400 AdapterHandlerEntry* buffered_entry = ArchiveBuilder::current()->get_buffered_addr(entry);
3401 assert(buffered_entry != nullptr,"sanity check");
3402
3447 // This method is used during production run to link archived adapters (stored in AOT Cache)
3448 // to their code in AOT Code Cache
3449 void AdapterHandlerEntry::link() {
3450 ResourceMark rm;
3451 assert(_fingerprint != nullptr, "_fingerprint must not be null");
3452 bool generate_code = false;
3453 // Generate code only if AOTCodeCache is not available, or
3454 // caching adapters is disabled, or we fail to link
3455 // the AdapterHandlerEntry to its code in the AOTCodeCache
3456 if (AOTCodeCache::is_using_adapter()) {
3457 AdapterHandlerLibrary::link_aot_adapter_handler(this);
3458 // If link_aot_adapter_handler() succeeds, _adapter_blob will be non-null
3459 if (_adapter_blob == nullptr) {
3460 log_warning(aot)("Failed to link AdapterHandlerEntry (fp=%s) to its code in the AOT code cache", _fingerprint->as_basic_args_string());
3461 generate_code = true;
3462 }
3463 } else {
3464 generate_code = true;
3465 }
3466 if (generate_code) {
3467 CompiledEntrySignature ces;
3468 ces.initialize_from_fingerprint(_fingerprint);
3469 if (!AdapterHandlerLibrary::generate_adapter_code(this, ces, true, false)) {
3470 // Don't throw exceptions during VM initialization because java.lang.* classes
3471 // might not have been initialized, causing problems when constructing the
3472 // Java exception object.
3473 vm_exit_during_initialization("Out of space in CodeCache for adapters");
3474 }
3475 }
3476 if (_adapter_blob != nullptr) {
3477 post_adapter_creation(this);
3478 }
3479 assert(_linked, "AdapterHandlerEntry must now be linked");
3480 }
3481
3482 void AdapterHandlerLibrary::link_aot_adapters() {
3483 uint max_id = 0;
3484 assert(AOTCodeCache::is_using_adapter(), "AOT adapters code should be available");
3485 /* It is possible that some adapters generated in assembly phase are not stored in the cache.
3486 * That implies adapter ids of the adapters in the cache may not be contiguous.
3487 * If the size of the _aot_adapter_handler_table is used to initialize _id_counter, then it may
3488 * result in collision of adapter ids between AOT stored handlers and runtime generated handlers.
3489 * To avoid such situation, initialize the _id_counter with the largest adapter id among the AOT stored handlers.
3490 */
3491 _aot_adapter_handler_table.iterate_all([&](AdapterHandlerEntry* entry) {
3492 assert(!entry->is_linked(), "AdapterHandlerEntry is already linked!");
3493 entry->link();
3494 max_id = MAX2(max_id, entry->id());
3495 });
3496 // Set adapter id to the maximum id found in the AOTCache
3497 assert(_id_counter == 0, "Did not expect new AdapterHandlerEntry to be created at this stage");
3498 _id_counter = max_id;
3499 }
3500
3501 // This method is called during production run to lookup simple adapters
3502 // in the archived adapter handler table
3503 void AdapterHandlerLibrary::lookup_simple_adapters() {
3504 assert(!_aot_adapter_handler_table.empty(), "archived adapter handler table is empty");
3505
3506 MutexLocker mu(AdapterHandlerLibrary_lock);
3507 ResourceMark rm;
3508 CompiledEntrySignature no_args;
3509 no_args.compute_calling_conventions();
3510 _no_arg_handler = lookup(no_args.sig_cc(), no_args.has_inline_recv());
3511
3512 CompiledEntrySignature obj_args;
3513 SigEntry::add_entry(obj_args.sig(), T_OBJECT);
3514 obj_args.compute_calling_conventions();
3515 _obj_arg_handler = lookup(obj_args.sig_cc(), obj_args.has_inline_recv());
3516
3517 CompiledEntrySignature int_args;
3518 SigEntry::add_entry(int_args.sig(), T_INT);
3519 int_args.compute_calling_conventions();
3520 _int_arg_handler = lookup(int_args.sig_cc(), int_args.has_inline_recv());
3521
3522 CompiledEntrySignature obj_int_args;
3523 SigEntry::add_entry(obj_int_args.sig(), T_OBJECT);
3524 SigEntry::add_entry(obj_int_args.sig(), T_INT);
3525 obj_int_args.compute_calling_conventions();
3526 _obj_int_arg_handler = lookup(obj_int_args.sig_cc(), obj_int_args.has_inline_recv());
3527
3528 CompiledEntrySignature obj_obj_args;
3529 SigEntry::add_entry(obj_obj_args.sig(), T_OBJECT);
3530 SigEntry::add_entry(obj_obj_args.sig(), T_OBJECT);
3531 obj_obj_args.compute_calling_conventions();
3532 _obj_obj_arg_handler = lookup(obj_obj_args.sig_cc(), obj_obj_args.has_inline_recv());
3533
3534 assert(_no_arg_handler != nullptr &&
3535 _obj_arg_handler != nullptr &&
3536 _int_arg_handler != nullptr &&
3537 _obj_int_arg_handler != nullptr &&
3538 _obj_obj_arg_handler != nullptr, "Initial adapters not found in archived adapter handler table");
3539 assert(_no_arg_handler->is_linked() &&
3540 _obj_arg_handler->is_linked() &&
3541 _int_arg_handler->is_linked() &&
3542 _obj_int_arg_handler->is_linked() &&
3543 _obj_obj_arg_handler->is_linked(), "Initial adapters not in linked state");
3544 }
3545 #endif // INCLUDE_CDS
3546
3547 void AdapterHandlerEntry::metaspace_pointers_do(MetaspaceClosure* it) {
3548 LogStreamHandle(Trace, aot) lsh;
3549 if (lsh.is_enabled()) {
3550 lsh.print("Iter(AdapterHandlerEntry): %p(%s)", this, _fingerprint->as_basic_args_string());
3551 lsh.cr();
3552 }
3553 it->push(&_fingerprint);
3554 }
3555
3556 AdapterHandlerEntry::~AdapterHandlerEntry() {
3557 if (_fingerprint != nullptr) {
3558 AdapterFingerPrint::deallocate(_fingerprint);
3559 _fingerprint = nullptr;
3560 }
3561 if (_sig_cc != nullptr) {
3562 delete _sig_cc;
3563 }
3564 #ifdef ASSERT
3565 FREE_C_HEAP_ARRAY(unsigned char, _saved_code);
3566 #endif
3567 FreeHeap(this);
3568 }
3569
3570
3571 #ifdef ASSERT
3572 // Capture the code before relocation so that it can be compared
3573 // against other versions. If the code is captured after relocation
3574 // then relative instructions won't be equivalent.
3575 void AdapterHandlerEntry::save_code(unsigned char* buffer, int length) {
3576 _saved_code = NEW_C_HEAP_ARRAY(unsigned char, length, mtCode);
3577 _saved_code_length = length;
3578 memcpy(_saved_code, buffer, length);
3579 }
3580
3581
3582 bool AdapterHandlerEntry::compare_code(AdapterHandlerEntry* other) {
3583 assert(_saved_code != nullptr && other->_saved_code != nullptr, "code not saved");
3631
3632 struct { double data[20]; } locs_buf;
3633 struct { double data[20]; } stubs_locs_buf;
3634 buffer.insts()->initialize_shared_locs((relocInfo*)&locs_buf, sizeof(locs_buf) / sizeof(relocInfo));
3635 #if defined(AARCH64) || defined(PPC64)
3636 // On AArch64 with ZGC and nmethod entry barriers, we need all oops to be
3637 // in the constant pool to ensure ordering between the barrier and oops
3638 // accesses. For native_wrappers we need a constant.
3639 // On PPC64 the continuation enter intrinsic needs the constant pool for the compiled
3640 // static java call that is resolved in the runtime.
3641 if (PPC64_ONLY(method->is_continuation_enter_intrinsic() &&) true) {
3642 buffer.initialize_consts_size(8 PPC64_ONLY(+ 24));
3643 }
3644 #endif
3645 buffer.stubs()->initialize_shared_locs((relocInfo*)&stubs_locs_buf, sizeof(stubs_locs_buf) / sizeof(relocInfo));
3646 MacroAssembler _masm(&buffer);
3647
3648 // Fill in the signature array, for the calling-convention call.
3649 const int total_args_passed = method->size_of_parameters();
3650
3651 BasicType stack_sig_bt[16];
3652 VMRegPair stack_regs[16];
3653 BasicType* sig_bt = (total_args_passed <= 16) ? stack_sig_bt : NEW_RESOURCE_ARRAY(BasicType, total_args_passed);
3654 VMRegPair* regs = (total_args_passed <= 16) ? stack_regs : NEW_RESOURCE_ARRAY(VMRegPair, total_args_passed);
3655
3656 int i = 0;
3657 if (!method->is_static()) { // Pass in receiver first
3658 sig_bt[i++] = T_OBJECT;
3659 }
3660 SignatureStream ss(method->signature());
3661 for (; !ss.at_return_type(); ss.next()) {
3662 sig_bt[i++] = ss.type(); // Collect remaining bits of signature
3663 if (ss.type() == T_LONG || ss.type() == T_DOUBLE) {
3664 sig_bt[i++] = T_VOID; // Longs & doubles take 2 Java slots
3665 }
3666 }
3667 assert(i == total_args_passed, "");
3668 BasicType ret_type = ss.type();
3669
3670 // Now get the compiled-Java arguments layout.
3671 SharedRuntime::java_calling_convention(sig_bt, regs, total_args_passed);
3672
3673 // Generate the compiled-to-native wrapper code
3674 nm = SharedRuntime::generate_native_wrapper(&_masm, method, compile_id, sig_bt, regs, ret_type);
3675
3676 if (nm != nullptr) {
3677 {
3678 MutexLocker pl(NMethodState_lock, Mutex::_no_safepoint_check_flag);
3679 if (nm->make_in_use()) {
3680 method->set_code(method, nm);
3681 }
3682 }
3683
3684 DirectiveSet* directive = DirectivesStack::getMatchingDirective(method, CompileBroker::compiler(CompLevel_simple));
3685 if (directive->PrintAssemblyOption) {
3686 nm->print_code();
3687 }
3688 DirectivesStack::release(directive);
3896 if (b == handler->adapter_blob()) {
3897 found = true;
3898 st->print("Adapter for signature: ");
3899 handler->print_adapter_on(st);
3900 return false; // abort iteration
3901 } else {
3902 return true; // keep looking
3903 }
3904 };
3905 assert_locked_or_safepoint(AdapterHandlerLibrary_lock);
3906 _adapter_handler_table->iterate(findblob_runtime_table);
3907 }
3908 assert(found, "Should have found handler");
3909 }
3910
3911 void AdapterHandlerEntry::print_adapter_on(outputStream* st) const {
3912 st->print("AHE@" INTPTR_FORMAT ": %s", p2i(this), fingerprint()->as_string());
3913 if (adapter_blob() != nullptr) {
3914 st->print(" i2c: " INTPTR_FORMAT, p2i(get_i2c_entry()));
3915 st->print(" c2i: " INTPTR_FORMAT, p2i(get_c2i_entry()));
3916 st->print(" c2iVE: " INTPTR_FORMAT, p2i(get_c2i_inline_entry()));
3917 st->print(" c2iVROE: " INTPTR_FORMAT, p2i(get_c2i_inline_ro_entry()));
3918 st->print(" c2iUE: " INTPTR_FORMAT, p2i(get_c2i_unverified_entry()));
3919 st->print(" c2iUVE: " INTPTR_FORMAT, p2i(get_c2i_unverified_inline_entry()));
3920 if (get_c2i_no_clinit_check_entry() != nullptr) {
3921 st->print(" c2iNCI: " INTPTR_FORMAT, p2i(get_c2i_no_clinit_check_entry()));
3922 }
3923 }
3924 st->cr();
3925 }
3926
3927 #ifndef PRODUCT
3928
3929 void AdapterHandlerLibrary::print_statistics() {
3930 print_table_statistics();
3931 }
3932
3933 #endif /* PRODUCT */
3934
3935 JRT_LEAF(void, SharedRuntime::enable_stack_reserved_zone(JavaThread* current))
3936 assert(current == JavaThread::current(), "pre-condition");
3937 StackOverflow* overflow_state = current->stack_overflow_state();
3938 overflow_state->enable_stack_reserved_zone(/*check_if_disabled*/true);
3939 overflow_state->set_reserved_stack_activation(current->stack_base());
3986 event.set_method(method);
3987 event.commit();
3988 }
3989 }
3990 }
3991 return activation;
3992 }
3993
3994 void SharedRuntime::on_slowpath_allocation_exit(JavaThread* current) {
3995 // After any safepoint, just before going back to compiled code,
3996 // we inform the GC that we will be doing initializing writes to
3997 // this object in the future without emitting card-marks, so
3998 // GC may take any compensating steps.
3999
4000 oop new_obj = current->vm_result_oop();
4001 if (new_obj == nullptr) return;
4002
4003 BarrierSet *bs = BarrierSet::barrier_set();
4004 bs->on_slowpath_allocation_exit(current, new_obj);
4005 }
4006
4007 // We are at a compiled code to interpreter call. We need backing
4008 // buffers for all inline type arguments. Allocate an object array to
4009 // hold them (convenient because once we're done with it we don't have
4010 // to worry about freeing it).
4011 oop SharedRuntime::allocate_inline_types_impl(JavaThread* current, methodHandle callee, bool allocate_receiver, TRAPS) {
4012 assert(InlineTypePassFieldsAsArgs, "no reason to call this");
4013 ResourceMark rm;
4014
4015 int nb_slots = 0;
4016 InstanceKlass* holder = callee->method_holder();
4017 allocate_receiver &= !callee->is_static() && holder->is_inline_klass() && callee->is_scalarized_arg(0);
4018 if (allocate_receiver) {
4019 nb_slots++;
4020 }
4021 int arg_num = callee->is_static() ? 0 : 1;
4022 for (SignatureStream ss(callee->signature()); !ss.at_return_type(); ss.next()) {
4023 BasicType bt = ss.type();
4024 if (bt == T_OBJECT && callee->is_scalarized_arg(arg_num)) {
4025 nb_slots++;
4026 }
4027 if (bt != T_VOID) {
4028 arg_num++;
4029 }
4030 }
4031 objArrayOop array_oop = oopFactory::new_objectArray(nb_slots, CHECK_NULL);
4032 objArrayHandle array(THREAD, array_oop);
4033 arg_num = callee->is_static() ? 0 : 1;
4034 int i = 0;
4035 if (allocate_receiver) {
4036 InlineKlass* vk = InlineKlass::cast(holder);
4037 oop res = vk->allocate_instance(CHECK_NULL);
4038 array->obj_at_put(i++, res);
4039 }
4040 for (SignatureStream ss(callee->signature()); !ss.at_return_type(); ss.next()) {
4041 BasicType bt = ss.type();
4042 if (bt == T_OBJECT && callee->is_scalarized_arg(arg_num)) {
4043 InlineKlass* vk = ss.as_inline_klass(holder);
4044 assert(vk != nullptr, "Unexpected klass");
4045 oop res = vk->allocate_instance(CHECK_NULL);
4046 array->obj_at_put(i++, res);
4047 }
4048 if (bt != T_VOID) {
4049 arg_num++;
4050 }
4051 }
4052 return array();
4053 }
4054
4055 JRT_ENTRY(void, SharedRuntime::allocate_inline_types(JavaThread* current, Method* callee_method, bool allocate_receiver))
4056 methodHandle callee(current, callee_method);
4057 oop array = SharedRuntime::allocate_inline_types_impl(current, callee, allocate_receiver, CHECK);
4058 current->set_vm_result_oop(array);
4059 current->set_vm_result_metadata(callee()); // TODO: required to keep callee live?
4060 JRT_END
4061
4062 // We're returning from an interpreted method: load each field into a
4063 // register following the calling convention
4064 JRT_LEAF(void, SharedRuntime::load_inline_type_fields_in_regs(JavaThread* current, oopDesc* res))
4065 {
4066 assert(res->klass()->is_inline_klass(), "only inline types here");
4067 ResourceMark rm;
4068 RegisterMap reg_map(current,
4069 RegisterMap::UpdateMap::include,
4070 RegisterMap::ProcessFrames::include,
4071 RegisterMap::WalkContinuation::skip);
4072 frame stubFrame = current->last_frame();
4073 frame callerFrame = stubFrame.sender(®_map);
4074 assert(callerFrame.is_interpreted_frame(), "should be coming from interpreter");
4075
4076 InlineKlass* vk = InlineKlass::cast(res->klass());
4077
4078 const Array<SigEntry>* sig_vk = vk->extended_sig();
4079 const Array<VMRegPair>* regs = vk->return_regs();
4080
4081 if (regs == nullptr) {
4082 // The fields of the inline klass don't fit in registers, bail out
4083 return;
4084 }
4085
4086 int j = 1;
4087 for (int i = 0; i < sig_vk->length(); i++) {
4088 BasicType bt = sig_vk->at(i)._bt;
4089 if (bt == T_METADATA) {
4090 continue;
4091 }
4092 if (bt == T_VOID) {
4093 if (sig_vk->at(i-1)._bt == T_LONG ||
4094 sig_vk->at(i-1)._bt == T_DOUBLE) {
4095 j++;
4096 }
4097 continue;
4098 }
4099 int off = sig_vk->at(i)._offset;
4100 assert(off > 0, "offset in object should be positive");
4101 VMRegPair pair = regs->at(j);
4102 address loc = reg_map.location(pair.first(), nullptr);
4103 switch(bt) {
4104 case T_BOOLEAN:
4105 *(jboolean*)loc = res->bool_field(off);
4106 break;
4107 case T_CHAR:
4108 *(jchar*)loc = res->char_field(off);
4109 break;
4110 case T_BYTE:
4111 *(jbyte*)loc = res->byte_field(off);
4112 break;
4113 case T_SHORT:
4114 *(jshort*)loc = res->short_field(off);
4115 break;
4116 case T_INT: {
4117 *(jint*)loc = res->int_field(off);
4118 break;
4119 }
4120 case T_LONG:
4121 #ifdef _LP64
4122 *(intptr_t*)loc = res->long_field(off);
4123 #else
4124 Unimplemented();
4125 #endif
4126 break;
4127 case T_OBJECT:
4128 case T_ARRAY: {
4129 *(oop*)loc = res->obj_field(off);
4130 break;
4131 }
4132 case T_FLOAT:
4133 *(jfloat*)loc = res->float_field(off);
4134 break;
4135 case T_DOUBLE:
4136 *(jdouble*)loc = res->double_field(off);
4137 break;
4138 default:
4139 ShouldNotReachHere();
4140 }
4141 j++;
4142 }
4143 assert(j == regs->length(), "missed a field?");
4144
4145 #ifdef ASSERT
4146 VMRegPair pair = regs->at(0);
4147 address loc = reg_map.location(pair.first(), nullptr);
4148 assert(*(oopDesc**)loc == res, "overwritten object");
4149 #endif
4150
4151 current->set_vm_result_oop(res);
4152 }
4153 JRT_END
4154
4155 // We've returned to an interpreted method, the interpreter needs a
4156 // reference to an inline type instance. Allocate it and initialize it
4157 // from field's values in registers.
4158 JRT_BLOCK_ENTRY(void, SharedRuntime::store_inline_type_fields_to_buf(JavaThread* current, intptr_t res))
4159 {
4160 ResourceMark rm;
4161 RegisterMap reg_map(current,
4162 RegisterMap::UpdateMap::include,
4163 RegisterMap::ProcessFrames::include,
4164 RegisterMap::WalkContinuation::skip);
4165 frame stubFrame = current->last_frame();
4166 frame callerFrame = stubFrame.sender(®_map);
4167
4168 #ifdef ASSERT
4169 InlineKlass* verif_vk = InlineKlass::returned_inline_klass(reg_map);
4170 #endif
4171
4172 if (!is_set_nth_bit(res, 0)) {
4173 // We're not returning with inline type fields in registers (the
4174 // calling convention didn't allow it for this inline klass)
4175 assert(!Metaspace::contains((void*)res), "should be oop or pointer in buffer area");
4176 current->set_vm_result_oop((oopDesc*)res);
4177 assert(verif_vk == nullptr, "broken calling convention");
4178 return;
4179 }
4180
4181 clear_nth_bit(res, 0);
4182 InlineKlass* vk = (InlineKlass*)res;
4183 assert(verif_vk == vk, "broken calling convention");
4184 assert(Metaspace::contains((void*)res), "should be klass");
4185
4186 // Allocate handles for every oop field so they are safe in case of
4187 // a safepoint when allocating
4188 GrowableArray<Handle> handles;
4189 vk->save_oop_fields(reg_map, handles);
4190
4191 // It's unsafe to safepoint until we are here
4192 JRT_BLOCK;
4193 {
4194 JavaThread* THREAD = current;
4195 oop vt = vk->realloc_result(reg_map, handles, CHECK);
4196 current->set_vm_result_oop(vt);
4197 }
4198 JRT_BLOCK_END;
4199 }
4200 JRT_END
|