30 #include "classfile/javaClasses.inline.hpp"
31 #include "classfile/stringTable.hpp"
32 #include "classfile/vmClasses.hpp"
33 #include "classfile/vmSymbols.hpp"
34 #include "code/aotCodeCache.hpp"
35 #include "code/codeCache.hpp"
36 #include "code/compiledIC.hpp"
37 #include "code/nmethod.inline.hpp"
38 #include "code/scopeDesc.hpp"
39 #include "code/vtableStubs.hpp"
40 #include "compiler/abstractCompiler.hpp"
41 #include "compiler/compileBroker.hpp"
42 #include "compiler/disassembler.hpp"
43 #include "gc/shared/barrierSet.hpp"
44 #include "gc/shared/collectedHeap.hpp"
45 #include "interpreter/interpreter.hpp"
46 #include "interpreter/interpreterRuntime.hpp"
47 #include "jfr/jfrEvents.hpp"
48 #include "jvm.h"
49 #include "logging/log.hpp"
50 #include "memory/resourceArea.hpp"
51 #include "memory/universe.hpp"
52 #include "metaprogramming/primitiveConversions.hpp"
53 #include "oops/klass.hpp"
54 #include "oops/method.inline.hpp"
55 #include "oops/objArrayKlass.hpp"
56 #include "oops/oop.inline.hpp"
57 #include "prims/forte.hpp"
58 #include "prims/jvmtiExport.hpp"
59 #include "prims/jvmtiThreadState.hpp"
60 #include "prims/methodHandles.hpp"
61 #include "prims/nativeLookup.hpp"
62 #include "runtime/arguments.hpp"
63 #include "runtime/atomicAccess.hpp"
64 #include "runtime/basicLock.inline.hpp"
65 #include "runtime/frame.inline.hpp"
66 #include "runtime/handles.inline.hpp"
67 #include "runtime/init.hpp"
68 #include "runtime/interfaceSupport.inline.hpp"
69 #include "runtime/java.hpp"
70 #include "runtime/javaCalls.hpp"
71 #include "runtime/jniHandles.inline.hpp"
72 #include "runtime/osThread.hpp"
73 #include "runtime/perfData.hpp"
74 #include "runtime/sharedRuntime.hpp"
75 #include "runtime/stackWatermarkSet.hpp"
76 #include "runtime/stubRoutines.hpp"
77 #include "runtime/synchronizer.hpp"
78 #include "runtime/timerTrace.hpp"
79 #include "runtime/vframe.inline.hpp"
80 #include "runtime/vframeArray.hpp"
81 #include "runtime/vm_version.hpp"
82 #include "utilities/copy.hpp"
83 #include "utilities/dtrace.hpp"
84 #include "utilities/events.hpp"
85 #include "utilities/exceptions.hpp"
86 #include "utilities/globalDefinitions.hpp"
87 #include "utilities/hashTable.hpp"
88 #include "utilities/macros.hpp"
89 #include "utilities/xmlstream.hpp"
90 #ifdef COMPILER1
91 #include "c1/c1_Runtime1.hpp"
92 #endif
93 #ifdef COMPILER2
94 #include "opto/runtime.hpp"
1218 // for a call current in progress, i.e., arguments has been pushed on stack
1219 // but callee has not been invoked yet. Caller frame must be compiled.
1220 Handle SharedRuntime::find_callee_info_helper(vframeStream& vfst, Bytecodes::Code& bc,
1221 CallInfo& callinfo, TRAPS) {
1222 Handle receiver;
1223 Handle nullHandle; // create a handy null handle for exception returns
1224 JavaThread* current = THREAD;
1225
1226 assert(!vfst.at_end(), "Java frame must exist");
1227
1228 // Find caller and bci from vframe
1229 methodHandle caller(current, vfst.method());
1230 int bci = vfst.bci();
1231
1232 if (caller->is_continuation_enter_intrinsic()) {
1233 bc = Bytecodes::_invokestatic;
1234 LinkResolver::resolve_continuation_enter(callinfo, CHECK_NH);
1235 return receiver;
1236 }
1237
1238 Bytecode_invoke bytecode(caller, bci);
1239 int bytecode_index = bytecode.index();
1240 bc = bytecode.invoke_code();
1241
1242 methodHandle attached_method(current, extract_attached_method(vfst));
1243 if (attached_method.not_null()) {
1244 Method* callee = bytecode.static_target(CHECK_NH);
1245 vmIntrinsics::ID id = callee->intrinsic_id();
1246 // When VM replaces MH.invokeBasic/linkTo* call with a direct/virtual call,
1247 // it attaches statically resolved method to the call site.
1248 if (MethodHandles::is_signature_polymorphic(id) &&
1249 MethodHandles::is_signature_polymorphic_intrinsic(id)) {
1250 bc = MethodHandles::signature_polymorphic_intrinsic_bytecode(id);
1251
1252 // Adjust invocation mode according to the attached method.
1253 switch (bc) {
1254 case Bytecodes::_invokevirtual:
1255 if (attached_method->method_holder()->is_interface()) {
1256 bc = Bytecodes::_invokeinterface;
1257 }
1258 break;
1259 case Bytecodes::_invokeinterface:
1260 if (!attached_method->method_holder()->is_interface()) {
1261 bc = Bytecodes::_invokevirtual;
1262 }
1263 break;
1264 case Bytecodes::_invokehandle:
1265 if (!MethodHandles::is_signature_polymorphic_method(attached_method())) {
1266 bc = attached_method->is_static() ? Bytecodes::_invokestatic
1267 : Bytecodes::_invokevirtual;
1268 }
1269 break;
1270 default:
1271 break;
1272 }
1273 }
1274 }
1275
1276 assert(bc != Bytecodes::_illegal, "not initialized");
1277
1278 bool has_receiver = bc != Bytecodes::_invokestatic &&
1279 bc != Bytecodes::_invokedynamic &&
1280 bc != Bytecodes::_invokehandle;
1281
1282 // Find receiver for non-static call
1283 if (has_receiver) {
1284 // This register map must be update since we need to find the receiver for
1285 // compiled frames. The receiver might be in a register.
1286 RegisterMap reg_map2(current,
1287 RegisterMap::UpdateMap::include,
1288 RegisterMap::ProcessFrames::include,
1289 RegisterMap::WalkContinuation::skip);
1290 frame stubFrame = current->last_frame();
1291 // Caller-frame is a compiled frame
1292 frame callerFrame = stubFrame.sender(®_map2);
1293
1294 if (attached_method.is_null()) {
1295 Method* callee = bytecode.static_target(CHECK_NH);
1296 if (callee == nullptr) {
1297 THROW_(vmSymbols::java_lang_NoSuchMethodException(), nullHandle);
1298 }
1299 }
1300
1301 // Retrieve from a compiled argument list
1302 receiver = Handle(current, callerFrame.retrieve_receiver(®_map2));
1303 assert(oopDesc::is_oop_or_null(receiver()), "");
1304
1305 if (receiver.is_null()) {
1306 THROW_(vmSymbols::java_lang_NullPointerException(), nullHandle);
1307 }
1308 }
1309
1310 // Resolve method
1311 if (attached_method.not_null()) {
1312 // Parameterized by attached method.
1313 LinkResolver::resolve_invoke(callinfo, receiver, attached_method, bc, CHECK_NH);
1314 } else {
1315 // Parameterized by bytecode.
1316 constantPoolHandle constants(current, caller->constants());
1317 LinkResolver::resolve_invoke(callinfo, receiver, constants, bytecode_index, bc, CHECK_NH);
1318 }
1319
1320 #ifdef ASSERT
1321 // Check that the receiver klass is of the right subtype and that it is initialized for virtual calls
1322 if (has_receiver) {
1323 assert(receiver.not_null(), "should have thrown exception");
1324 Klass* receiver_klass = receiver->klass();
1325 Klass* rk = nullptr;
1326 if (attached_method.not_null()) {
1327 // In case there's resolved method attached, use its holder during the check.
1328 rk = attached_method->method_holder();
1329 } else {
1330 // Klass is already loaded.
1331 constantPoolHandle constants(current, caller->constants());
1332 rk = constants->klass_ref_at(bytecode_index, bc, CHECK_NH);
1333 }
1334 Klass* static_receiver_klass = rk;
1335 assert(receiver_klass->is_subtype_of(static_receiver_klass),
1336 "actual receiver must be subclass of static receiver klass");
1337 if (receiver_klass->is_instance_klass()) {
1338 if (InstanceKlass::cast(receiver_klass)->is_not_initialized()) {
1339 tty->print_cr("ERROR: Klass not yet initialized!!");
1340 receiver_klass->print();
1341 }
1342 assert(!InstanceKlass::cast(receiver_klass)->is_not_initialized(), "receiver_klass must be initialized");
1343 }
1344 }
1345 #endif
1346
1347 return receiver;
1348 }
1349
1350 methodHandle SharedRuntime::find_callee_method(TRAPS) {
1351 JavaThread* current = THREAD;
1352 ResourceMark rm(current);
1353 // We need first to check if any Java activations (compiled, interpreted)
1354 // exist on the stack since last JavaCall. If not, we need
1355 // to get the target method from the JavaCall wrapper.
1356 vframeStream vfst(current, true); // Do not skip any javaCalls
1357 methodHandle callee_method;
1358 if (vfst.at_end()) {
1359 // No Java frames were found on stack since we did the JavaCall.
1360 // Hence the stack can only contain an entry_frame. We need to
1361 // find the target method from the stub frame.
1362 RegisterMap reg_map(current,
1363 RegisterMap::UpdateMap::skip,
1364 RegisterMap::ProcessFrames::include,
1365 RegisterMap::WalkContinuation::skip);
1366 frame fr = current->last_frame();
1367 assert(fr.is_runtime_frame(), "must be a runtimeStub");
1368 fr = fr.sender(®_map);
1369 assert(fr.is_entry_frame(), "must be");
1370 // fr is now pointing to the entry frame.
1371 callee_method = methodHandle(current, fr.entry_frame_call_wrapper()->callee_method());
1372 } else {
1373 Bytecodes::Code bc;
1374 CallInfo callinfo;
1375 find_callee_info_helper(vfst, bc, callinfo, CHECK_(methodHandle()));
1376 callee_method = methodHandle(current, callinfo.selected_method());
1377 }
1378 assert(callee_method()->is_method(), "must be");
1379 return callee_method;
1380 }
1381
1382 // Resolves a call.
1383 methodHandle SharedRuntime::resolve_helper(bool is_virtual, bool is_optimized, TRAPS) {
1384 JavaThread* current = THREAD;
1385 ResourceMark rm(current);
1386 RegisterMap cbl_map(current,
1387 RegisterMap::UpdateMap::skip,
1388 RegisterMap::ProcessFrames::include,
1389 RegisterMap::WalkContinuation::skip);
1390 frame caller_frame = current->last_frame().sender(&cbl_map);
1391
1392 CodeBlob* caller_cb = caller_frame.cb();
1393 guarantee(caller_cb != nullptr && caller_cb->is_nmethod(), "must be called from compiled method");
1394 nmethod* caller_nm = caller_cb->as_nmethod();
1395
1396 // determine call info & receiver
1397 // note: a) receiver is null for static calls
1398 // b) an exception is thrown if receiver is null for non-static calls
1399 CallInfo call_info;
1400 Bytecodes::Code invoke_code = Bytecodes::_illegal;
1401 Handle receiver = find_callee_info(invoke_code, call_info, CHECK_(methodHandle()));
1402
1403 NoSafepointVerifier nsv;
1404
1405 methodHandle callee_method(current, call_info.selected_method());
1406
1407 assert((!is_virtual && invoke_code == Bytecodes::_invokestatic ) ||
1408 (!is_virtual && invoke_code == Bytecodes::_invokespecial) ||
1409 (!is_virtual && invoke_code == Bytecodes::_invokehandle ) ||
1410 (!is_virtual && invoke_code == Bytecodes::_invokedynamic) ||
1411 ( is_virtual && invoke_code != Bytecodes::_invokestatic ), "inconsistent bytecode");
1412
1413 assert(!caller_nm->is_unloading(), "It should not be unloading");
1414
1415 #ifndef PRODUCT
1416 // tracing/debugging/statistics
1417 uint *addr = (is_optimized) ? (&_resolve_opt_virtual_ctr) :
1418 (is_virtual) ? (&_resolve_virtual_ctr) :
1419 (&_resolve_static_ctr);
1420 AtomicAccess::inc(addr);
1421
1422 if (TraceCallFixup) {
1423 ResourceMark rm(current);
1424 tty->print("resolving %s%s (%s) call to",
1425 (is_optimized) ? "optimized " : "", (is_virtual) ? "virtual" : "static",
1426 Bytecodes::name(invoke_code));
1427 callee_method->print_short_name(tty);
1428 tty->print_cr(" at pc: " INTPTR_FORMAT " to code: " INTPTR_FORMAT,
1429 p2i(caller_frame.pc()), p2i(callee_method->code()));
1430 }
1431 #endif
1432
1433 if (invoke_code == Bytecodes::_invokestatic) {
1434 assert(callee_method->method_holder()->is_initialized() ||
1435 callee_method->method_holder()->is_reentrant_initialization(current),
1436 "invalid class initialization state for invoke_static");
1437 if (!VM_Version::supports_fast_class_init_checks() && callee_method->needs_clinit_barrier()) {
1438 // In order to keep class initialization check, do not patch call
1439 // site for static call when the class is not fully initialized.
1440 // Proper check is enforced by call site re-resolution on every invocation.
1441 //
1442 // When fast class initialization checks are supported (VM_Version::supports_fast_class_init_checks() == true),
1443 // explicit class initialization check is put in nmethod entry (VEP).
1444 assert(callee_method->method_holder()->is_linked(), "must be");
1445 return callee_method;
1446 }
1447 }
1448
1449
1450 // JSR 292 key invariant:
1451 // If the resolved method is a MethodHandle invoke target, the call
1452 // site must be a MethodHandle call site, because the lambda form might tail-call
1453 // leaving the stack in a state unknown to either caller or callee
1454
1455 // Compute entry points. The computation of the entry points is independent of
1456 // patching the call.
1457
1458 // Make sure the callee nmethod does not get deoptimized and removed before
1459 // we are done patching the code.
1460
1461
1462 CompiledICLocker ml(caller_nm);
1463 if (is_virtual && !is_optimized) {
1464 CompiledIC* inline_cache = CompiledIC_before(caller_nm, caller_frame.pc());
1465 inline_cache->update(&call_info, receiver->klass());
1466 } else {
1467 // Callsite is a direct call - set it to the destination method
1468 CompiledDirectCall* callsite = CompiledDirectCall::before(caller_frame.pc());
1469 callsite->set(callee_method);
1470 }
1471
1472 return callee_method;
1473 }
1474
1475 // Inline caches exist only in compiled code
1476 JRT_BLOCK_ENTRY(address, SharedRuntime::handle_wrong_method_ic_miss(JavaThread* current))
1477 #ifdef ASSERT
1478 RegisterMap reg_map(current,
1479 RegisterMap::UpdateMap::skip,
1480 RegisterMap::ProcessFrames::include,
1481 RegisterMap::WalkContinuation::skip);
1482 frame stub_frame = current->last_frame();
1483 assert(stub_frame.is_runtime_frame(), "sanity check");
1484 frame caller_frame = stub_frame.sender(®_map);
1485 assert(!caller_frame.is_interpreted_frame() && !caller_frame.is_entry_frame() && !caller_frame.is_upcall_stub_frame(), "unexpected frame");
1486 #endif /* ASSERT */
1487
1488 methodHandle callee_method;
1489 JRT_BLOCK
1490 callee_method = SharedRuntime::handle_ic_miss_helper(CHECK_NULL);
1491 // Return Method* through TLS
1492 current->set_vm_result_metadata(callee_method());
1493 JRT_BLOCK_END
1494 // return compiled code entry point after potential safepoints
1495 return get_resolved_entry(current, callee_method);
1496 JRT_END
1497
1498
1499 // Handle call site that has been made non-entrant
1500 JRT_BLOCK_ENTRY(address, SharedRuntime::handle_wrong_method(JavaThread* current))
1501 // 6243940 We might end up in here if the callee is deoptimized
1502 // as we race to call it. We don't want to take a safepoint if
1503 // the caller was interpreted because the caller frame will look
1504 // interpreted to the stack walkers and arguments are now
1505 // "compiled" so it is much better to make this transition
1506 // invisible to the stack walking code. The i2c path will
1507 // place the callee method in the callee_target. It is stashed
1508 // there because if we try and find the callee by normal means a
1509 // safepoint is possible and have trouble gc'ing the compiled args.
1510 RegisterMap reg_map(current,
1511 RegisterMap::UpdateMap::skip,
1512 RegisterMap::ProcessFrames::include,
1513 RegisterMap::WalkContinuation::skip);
1514 frame stub_frame = current->last_frame();
1515 assert(stub_frame.is_runtime_frame(), "sanity check");
1516 frame caller_frame = stub_frame.sender(®_map);
1517
1518 if (caller_frame.is_interpreted_frame() ||
1519 caller_frame.is_entry_frame() ||
1520 caller_frame.is_upcall_stub_frame()) {
1521 Method* callee = current->callee_target();
1522 guarantee(callee != nullptr && callee->is_method(), "bad handshake");
1523 current->set_vm_result_metadata(callee);
1524 current->set_callee_target(nullptr);
1525 if (caller_frame.is_entry_frame() && VM_Version::supports_fast_class_init_checks()) {
1526 // Bypass class initialization checks in c2i when caller is in native.
1527 // JNI calls to static methods don't have class initialization checks.
1528 // Fast class initialization checks are present in c2i adapters and call into
1529 // SharedRuntime::handle_wrong_method() on the slow path.
1530 //
1531 // JVM upcalls may land here as well, but there's a proper check present in
1532 // LinkResolver::resolve_static_call (called from JavaCalls::call_static),
1533 // so bypassing it in c2i adapter is benign.
1534 return callee->get_c2i_no_clinit_check_entry();
1535 } else {
1536 return callee->get_c2i_entry();
1537 }
1538 }
1539
1540 // Must be compiled to compiled path which is safe to stackwalk
1541 methodHandle callee_method;
1542 JRT_BLOCK
1543 // Force resolving of caller (if we called from compiled frame)
1544 callee_method = SharedRuntime::reresolve_call_site(CHECK_NULL);
1545 current->set_vm_result_metadata(callee_method());
1546 JRT_BLOCK_END
1547 // return compiled code entry point after potential safepoints
1548 return get_resolved_entry(current, callee_method);
1549 JRT_END
1550
1551 // Handle abstract method call
1552 JRT_BLOCK_ENTRY(address, SharedRuntime::handle_wrong_method_abstract(JavaThread* current))
1553 // Verbose error message for AbstractMethodError.
1554 // Get the called method from the invoke bytecode.
1555 vframeStream vfst(current, true);
1556 assert(!vfst.at_end(), "Java frame must exist");
1557 methodHandle caller(current, vfst.method());
1558 Bytecode_invoke invoke(caller, vfst.bci());
1559 DEBUG_ONLY( invoke.verify(); )
1560
1561 // Find the compiled caller frame.
1562 RegisterMap reg_map(current,
1563 RegisterMap::UpdateMap::include,
1564 RegisterMap::ProcessFrames::include,
1565 RegisterMap::WalkContinuation::skip);
1566 frame stubFrame = current->last_frame();
1567 assert(stubFrame.is_runtime_frame(), "must be");
1568 frame callerFrame = stubFrame.sender(®_map);
1569 assert(callerFrame.is_compiled_frame(), "must be");
1570
1571 // Install exception and return forward entry.
1572 address res = SharedRuntime::throw_AbstractMethodError_entry();
1573 JRT_BLOCK
1574 methodHandle callee(current, invoke.static_target(current));
1575 if (!callee.is_null()) {
1576 oop recv = callerFrame.retrieve_receiver(®_map);
1577 Klass *recv_klass = (recv != nullptr) ? recv->klass() : nullptr;
1578 res = StubRoutines::forward_exception_entry();
1579 LinkResolver::throw_abstract_method_error(callee, recv_klass, CHECK_(res));
1580 }
1581 JRT_BLOCK_END
1582 return res;
1583 JRT_END
1584
1585 // return verified_code_entry if interp_only_mode is not set for the current thread;
1586 // otherwise return c2i entry.
1587 address SharedRuntime::get_resolved_entry(JavaThread* current, methodHandle callee_method) {
1588 if (current->is_interp_only_mode() && !callee_method->is_special_native_intrinsic()) {
1589 // In interp_only_mode we need to go to the interpreted entry
1590 // The c2i won't patch in this mode -- see fixup_callers_callsite
1591 return callee_method->get_c2i_entry();
1592 }
1593 assert(callee_method->verified_code_entry() != nullptr, " Jump to zero!");
1594 return callee_method->verified_code_entry();
1595 }
1596
1597 // resolve a static call and patch code
1598 JRT_BLOCK_ENTRY(address, SharedRuntime::resolve_static_call_C(JavaThread* current ))
1599 methodHandle callee_method;
1600 bool enter_special = false;
1601 JRT_BLOCK
1602 callee_method = SharedRuntime::resolve_helper(false, false, CHECK_NULL);
1603 current->set_vm_result_metadata(callee_method());
1604 JRT_BLOCK_END
1605 // return compiled code entry point after potential safepoints
1606 return get_resolved_entry(current, callee_method);
1607 JRT_END
1608
1609 // resolve virtual call and update inline cache to monomorphic
1610 JRT_BLOCK_ENTRY(address, SharedRuntime::resolve_virtual_call_C(JavaThread* current))
1611 methodHandle callee_method;
1612 JRT_BLOCK
1613 callee_method = SharedRuntime::resolve_helper(true, false, CHECK_NULL);
1614 current->set_vm_result_metadata(callee_method());
1615 JRT_BLOCK_END
1616 // return compiled code entry point after potential safepoints
1617 return get_resolved_entry(current, callee_method);
1618 JRT_END
1619
1620
1621 // Resolve a virtual call that can be statically bound (e.g., always
1622 // monomorphic, so it has no inline cache). Patch code to resolved target.
1623 JRT_BLOCK_ENTRY(address, SharedRuntime::resolve_opt_virtual_call_C(JavaThread* current))
1624 methodHandle callee_method;
1625 JRT_BLOCK
1626 callee_method = SharedRuntime::resolve_helper(true, true, CHECK_NULL);
1627 current->set_vm_result_metadata(callee_method());
1628 JRT_BLOCK_END
1629 // return compiled code entry point after potential safepoints
1630 return get_resolved_entry(current, callee_method);
1631 JRT_END
1632
1633 methodHandle SharedRuntime::handle_ic_miss_helper(TRAPS) {
1634 JavaThread* current = THREAD;
1635 ResourceMark rm(current);
1636 CallInfo call_info;
1637 Bytecodes::Code bc;
1638
1639 // receiver is null for static calls. An exception is thrown for null
1640 // receivers for non-static calls
1641 Handle receiver = find_callee_info(bc, call_info, CHECK_(methodHandle()));
1642
1643 methodHandle callee_method(current, call_info.selected_method());
1644
1645 #ifndef PRODUCT
1646 AtomicAccess::inc(&_ic_miss_ctr);
1647
1648 // Statistics & Tracing
1649 if (TraceCallFixup) {
1650 ResourceMark rm(current);
1651 tty->print("IC miss (%s) call to", Bytecodes::name(bc));
1652 callee_method->print_short_name(tty);
1653 tty->print_cr(" code: " INTPTR_FORMAT, p2i(callee_method->code()));
1654 }
1655
1656 if (ICMissHistogram) {
1657 MutexLocker m(VMStatistic_lock);
1658 RegisterMap reg_map(current,
1659 RegisterMap::UpdateMap::skip,
1660 RegisterMap::ProcessFrames::include,
1661 RegisterMap::WalkContinuation::skip);
1662 frame f = current->last_frame().real_sender(®_map);// skip runtime stub
1663 // produce statistics under the lock
1664 trace_ic_miss(f.pc());
1665 }
1666 #endif
1667
1668 // install an event collector so that when a vtable stub is created the
1669 // profiler can be notified via a DYNAMIC_CODE_GENERATED event. The
1670 // event can't be posted when the stub is created as locks are held
1671 // - instead the event will be deferred until the event collector goes
1672 // out of scope.
1673 JvmtiDynamicCodeEventCollector event_collector;
1674
1675 // Update inline cache to megamorphic. Skip update if we are called from interpreted.
1676 RegisterMap reg_map(current,
1677 RegisterMap::UpdateMap::skip,
1678 RegisterMap::ProcessFrames::include,
1679 RegisterMap::WalkContinuation::skip);
1680 frame caller_frame = current->last_frame().sender(®_map);
1681 CodeBlob* cb = caller_frame.cb();
1682 nmethod* caller_nm = cb->as_nmethod();
1683
1684 CompiledICLocker ml(caller_nm);
1685 CompiledIC* inline_cache = CompiledIC_before(caller_nm, caller_frame.pc());
1686 inline_cache->update(&call_info, receiver()->klass());
1687
1688 return callee_method;
1689 }
1690
1691 //
1692 // Resets a call-site in compiled code so it will get resolved again.
1693 // This routines handles both virtual call sites, optimized virtual call
1694 // sites, and static call sites. Typically used to change a call sites
1695 // destination from compiled to interpreted.
1696 //
1697 methodHandle SharedRuntime::reresolve_call_site(TRAPS) {
1698 JavaThread* current = THREAD;
1699 ResourceMark rm(current);
1700 RegisterMap reg_map(current,
1701 RegisterMap::UpdateMap::skip,
1702 RegisterMap::ProcessFrames::include,
1703 RegisterMap::WalkContinuation::skip);
1704 frame stub_frame = current->last_frame();
1705 assert(stub_frame.is_runtime_frame(), "must be a runtimeStub");
1706 frame caller = stub_frame.sender(®_map);
1707
1708 // Do nothing if the frame isn't a live compiled frame.
1709 // nmethod could be deoptimized by the time we get here
1710 // so no update to the caller is needed.
1711
1712 if ((caller.is_compiled_frame() && !caller.is_deoptimized_frame()) ||
1713 (caller.is_native_frame() && caller.cb()->as_nmethod()->method()->is_continuation_enter_intrinsic())) {
1714
1715 address pc = caller.pc();
1716
1717 nmethod* caller_nm = CodeCache::find_nmethod(pc);
1718 assert(caller_nm != nullptr, "did not find caller nmethod");
1719
1720 // Default call_addr is the location of the "basic" call.
1721 // Determine the address of the call we a reresolving. With
1722 // Inline Caches we will always find a recognizable call.
1723 // With Inline Caches disabled we may or may not find a
1724 // recognizable call. We will always find a call for static
1725 // calls and for optimized virtual calls. For vanilla virtual
1726 // calls it depends on the state of the UseInlineCaches switch.
1727 //
1728 // With Inline Caches disabled we can get here for a virtual call
1729 // for two reasons:
1730 // 1 - calling an abstract method. The vtable for abstract methods
1731 // will run us thru handle_wrong_method and we will eventually
1732 // end up in the interpreter to throw the ame.
1733 // 2 - a racing deoptimization. We could be doing a vanilla vtable
1734 // call and between the time we fetch the entry address and
1735 // we jump to it the target gets deoptimized. Similar to 1
1736 // we will wind up in the interprter (thru a c2i with c2).
1737 //
1738 CompiledICLocker ml(caller_nm);
1739 address call_addr = caller_nm->call_instruction_address(pc);
1740
1741 if (call_addr != nullptr) {
1742 // On x86 the logic for finding a call instruction is blindly checking for a call opcode 5
1743 // bytes back in the instruction stream so we must also check for reloc info.
1744 RelocIterator iter(caller_nm, call_addr, call_addr+1);
1745 bool ret = iter.next(); // Get item
1746 if (ret) {
1747 switch (iter.type()) {
1748 case relocInfo::static_call_type:
1749 case relocInfo::opt_virtual_call_type: {
1750 CompiledDirectCall* cdc = CompiledDirectCall::at(call_addr);
1751 cdc->set_to_clean();
1752 break;
1753 }
1754
1755 case relocInfo::virtual_call_type: {
1756 // compiled, dispatched call (which used to call an interpreted method)
1757 CompiledIC* inline_cache = CompiledIC_at(caller_nm, call_addr);
1758 inline_cache->set_to_clean();
1759 break;
1760 }
1761 default:
1762 break;
1763 }
1764 }
1765 }
1766 }
1767
1768 methodHandle callee_method = find_callee_method(CHECK_(methodHandle()));
1769
1770
1771 #ifndef PRODUCT
1772 AtomicAccess::inc(&_wrong_method_ctr);
1773
1774 if (TraceCallFixup) {
1775 ResourceMark rm(current);
1776 tty->print("handle_wrong_method reresolving call to");
1777 callee_method->print_short_name(tty);
1778 tty->print_cr(" code: " INTPTR_FORMAT, p2i(callee_method->code()));
1779 }
1780 #endif
1781
1782 return callee_method;
1783 }
1784
1785 address SharedRuntime::handle_unsafe_access(JavaThread* thread, address next_pc) {
1786 // The faulting unsafe accesses should be changed to throw the error
1787 // synchronously instead. Meanwhile the faulting instruction will be
1788 // skipped over (effectively turning it into a no-op) and an
1789 // asynchronous exception will be raised which the thread will
1790 // handle at a later point. If the instruction is a load it will
1791 // return garbage.
1792
1793 // Request an async exception.
1794 thread->set_pending_unsafe_access_error();
1795
1796 // Return address of next instruction to execute.
1962 msglen += strlen(caster_klass_description) + strlen(target_klass_description) + strlen(klass_separator) + 3;
1963
1964 char* message = NEW_RESOURCE_ARRAY_RETURN_NULL(char, msglen);
1965 if (message == nullptr) {
1966 // Shouldn't happen, but don't cause even more problems if it does
1967 message = const_cast<char*>(caster_klass->external_name());
1968 } else {
1969 jio_snprintf(message,
1970 msglen,
1971 "class %s cannot be cast to class %s (%s%s%s)",
1972 caster_name,
1973 target_name,
1974 caster_klass_description,
1975 klass_separator,
1976 target_klass_description
1977 );
1978 }
1979 return message;
1980 }
1981
1982 JRT_LEAF(void, SharedRuntime::reguard_yellow_pages())
1983 (void) JavaThread::current()->stack_overflow_state()->reguard_stack();
1984 JRT_END
1985
1986 void SharedRuntime::monitor_enter_helper(oopDesc* obj, BasicLock* lock, JavaThread* current) {
1987 if (!SafepointSynchronize::is_synchronizing()) {
1988 // Only try quick_enter() if we're not trying to reach a safepoint
1989 // so that the calling thread reaches the safepoint more quickly.
1990 if (ObjectSynchronizer::quick_enter(obj, lock, current)) {
1991 return;
1992 }
1993 }
1994 // NO_ASYNC required because an async exception on the state transition destructor
1995 // would leave you with the lock held and it would never be released.
1996 // The normal monitorenter NullPointerException is thrown without acquiring a lock
1997 // and the model is that an exception implies the method failed.
1998 JRT_BLOCK_NO_ASYNC
1999 Handle h_obj(THREAD, obj);
2000 ObjectSynchronizer::enter(h_obj, lock, current);
2001 assert(!HAS_PENDING_EXCEPTION, "Should have no exception here");
2195 tty->print_cr("Note 1: counter updates are not MT-safe.");
2196 tty->print_cr("Note 2: %% in major categories are relative to total non-inlined calls;");
2197 tty->print_cr(" %% in nested categories are relative to their category");
2198 tty->print_cr(" (and thus add up to more than 100%% with inlining)");
2199 tty->cr();
2200
2201 MethodArityHistogram h;
2202 }
2203 #endif
2204
2205 #ifndef PRODUCT
2206 static int _lookups; // number of calls to lookup
2207 static int _equals; // number of buckets checked with matching hash
2208 static int _archived_hits; // number of successful lookups in archived table
2209 static int _runtime_hits; // number of successful lookups in runtime table
2210 #endif
2211
2212 // A simple wrapper class around the calling convention information
2213 // that allows sharing of adapters for the same calling convention.
2214 class AdapterFingerPrint : public MetaspaceObj {
2215 private:
2216 enum {
2217 _basic_type_bits = 4,
2218 _basic_type_mask = right_n_bits(_basic_type_bits),
2219 _basic_types_per_int = BitsPerInt / _basic_type_bits,
2220 };
2221 // TO DO: Consider integrating this with a more global scheme for compressing signatures.
2222 // For now, 4 bits per components (plus T_VOID gaps after double/long) is not excessive.
2223
2224 int _length;
2225
2226 static int data_offset() { return sizeof(AdapterFingerPrint); }
2227 int* data_pointer() {
2228 return (int*)((address)this + data_offset());
2229 }
2230
2231 // Private construtor. Use allocate() to get an instance.
2232 AdapterFingerPrint(int total_args_passed, BasicType* sig_bt, int len) {
2233 int* data = data_pointer();
2234 // Pack the BasicTypes with 8 per int
2235 assert(len == length(total_args_passed), "sanity");
2236 _length = len;
2237 int sig_index = 0;
2238 for (int index = 0; index < _length; index++) {
2239 int value = 0;
2240 for (int byte = 0; sig_index < total_args_passed && byte < _basic_types_per_int; byte++) {
2241 int bt = adapter_encoding(sig_bt[sig_index++]);
2242 assert((bt & _basic_type_mask) == bt, "must fit in 4 bits");
2243 value = (value << _basic_type_bits) | bt;
2244 }
2245 data[index] = value;
2246 }
2247 }
2248
2249 // Call deallocate instead
2250 ~AdapterFingerPrint() {
2251 ShouldNotCallThis();
2252 }
2253
2254 static int length(int total_args) {
2255 return (total_args + (_basic_types_per_int-1)) / _basic_types_per_int;
2256 }
2257
2258 static int compute_size_in_words(int len) {
2259 return (int)heap_word_size(sizeof(AdapterFingerPrint) + (len * sizeof(int)));
2260 }
2261
2262 // Remap BasicTypes that are handled equivalently by the adapters.
2263 // These are correct for the current system but someday it might be
2264 // necessary to make this mapping platform dependent.
2265 static int adapter_encoding(BasicType in) {
2266 switch (in) {
2267 case T_BOOLEAN:
2268 case T_BYTE:
2269 case T_SHORT:
2270 case T_CHAR:
2271 // There are all promoted to T_INT in the calling convention
2272 return T_INT;
2273
2274 case T_OBJECT:
2275 case T_ARRAY:
2276 // In other words, we assume that any register good enough for
2277 // an int or long is good enough for a managed pointer.
2278 #ifdef _LP64
2279 return T_LONG;
2280 #else
2281 return T_INT;
2282 #endif
2283
2284 case T_INT:
2285 case T_LONG:
2286 case T_FLOAT:
2287 case T_DOUBLE:
2288 case T_VOID:
2289 return in;
2290
2291 default:
2292 ShouldNotReachHere();
2293 return T_CONFLICT;
2294 }
2295 }
2296
2297 void* operator new(size_t size, size_t fp_size) throw() {
2298 assert(fp_size >= size, "sanity check");
2299 void* p = AllocateHeap(fp_size, mtCode);
2300 memset(p, 0, fp_size);
2301 return p;
2302 }
2303
2304 template<typename Function>
2305 void iterate_args(Function function) {
2306 for (int i = 0; i < length(); i++) {
2307 unsigned val = (unsigned)value(i);
2308 // args are packed so that first/lower arguments are in the highest
2309 // bits of each int value, so iterate from highest to the lowest
2310 for (int j = 32 - _basic_type_bits; j >= 0; j -= _basic_type_bits) {
2311 unsigned v = (val >> j) & _basic_type_mask;
2312 if (v == 0) {
2313 continue;
2314 }
2315 function(v);
2316 }
2317 }
2318 }
2319
2320 public:
2321 static AdapterFingerPrint* allocate(int total_args_passed, BasicType* sig_bt) {
2322 int len = length(total_args_passed);
2323 int size_in_bytes = BytesPerWord * compute_size_in_words(len);
2324 AdapterFingerPrint* afp = new (size_in_bytes) AdapterFingerPrint(total_args_passed, sig_bt, len);
2325 assert((afp->size() * BytesPerWord) == size_in_bytes, "should match");
2326 return afp;
2327 }
2328
2329 static void deallocate(AdapterFingerPrint* fp) {
2330 FreeHeap(fp);
2331 }
2332
2333 int value(int index) {
2334 int* data = data_pointer();
2335 return data[index];
2336 }
2337
2338 int length() {
2339 return _length;
2340 }
2341
2342 unsigned int compute_hash() {
2343 int hash = 0;
2344 for (int i = 0; i < length(); i++) {
2345 int v = value(i);
2346 //Add arithmetic operation to the hash, like +3 to improve hashing
2347 hash = ((hash << 8) ^ v ^ (hash >> 5)) + 3;
2348 }
2349 return (unsigned int)hash;
2350 }
2351
2352 const char* as_string() {
2353 stringStream st;
2354 st.print("0x");
2355 for (int i = 0; i < length(); i++) {
2356 st.print("%x", value(i));
2357 }
2358 return st.as_string();
2359 }
2360
2361 const char* as_basic_args_string() {
2362 stringStream st;
2363 bool long_prev = false;
2364 iterate_args([&] (int arg) {
2365 if (long_prev) {
2366 long_prev = false;
2367 if (arg == T_VOID) {
2368 st.print("J");
2369 } else {
2370 st.print("L");
2371 }
2372 }
2373 switch (arg) {
2374 case T_INT: st.print("I"); break;
2375 case T_LONG: long_prev = true; break;
2376 case T_FLOAT: st.print("F"); break;
2377 case T_DOUBLE: st.print("D"); break;
2378 case T_VOID: break;
2379 default: ShouldNotReachHere();
2380 }
2381 });
2382 if (long_prev) {
2383 st.print("L");
2384 }
2385 return st.as_string();
2386 }
2387
2388 BasicType* as_basic_type(int& nargs) {
2389 nargs = 0;
2390 GrowableArray<BasicType> btarray;
2391 bool long_prev = false;
2392
2393 iterate_args([&] (int arg) {
2394 if (long_prev) {
2395 long_prev = false;
2396 if (arg == T_VOID) {
2397 btarray.append(T_LONG);
2398 } else {
2399 btarray.append(T_OBJECT); // it could be T_ARRAY; it shouldn't matter
2400 }
2401 }
2402 switch (arg) {
2403 case T_INT: // fallthrough
2404 case T_FLOAT: // fallthrough
2405 case T_DOUBLE:
2406 case T_VOID:
2407 btarray.append((BasicType)arg);
2408 break;
2409 case T_LONG:
2410 long_prev = true;
2411 break;
2412 default: ShouldNotReachHere();
2413 }
2414 });
2415
2416 if (long_prev) {
2417 btarray.append(T_OBJECT);
2418 }
2419
2420 nargs = btarray.length();
2421 BasicType* sig_bt = NEW_RESOURCE_ARRAY(BasicType, nargs);
2422 int index = 0;
2423 GrowableArrayIterator<BasicType> iter = btarray.begin();
2424 while (iter != btarray.end()) {
2425 sig_bt[index++] = *iter;
2426 ++iter;
2427 }
2428 assert(index == btarray.length(), "sanity check");
2429 #ifdef ASSERT
2430 {
2431 AdapterFingerPrint* compare_fp = AdapterFingerPrint::allocate(nargs, sig_bt);
2432 assert(this->equals(compare_fp), "sanity check");
2433 AdapterFingerPrint::deallocate(compare_fp);
2434 }
2435 #endif
2436 return sig_bt;
2437 }
2438
2439 bool equals(AdapterFingerPrint* other) {
2440 if (other->_length != _length) {
2441 return false;
2442 } else {
2443 for (int i = 0; i < _length; i++) {
2444 if (value(i) != other->value(i)) {
2445 return false;
2446 }
2447 }
2448 }
2449 return true;
2450 }
2451
2452 // methods required by virtue of being a MetaspaceObj
2453 void metaspace_pointers_do(MetaspaceClosure* it) { return; /* nothing to do here */ }
2454 int size() const { return compute_size_in_words(_length); }
2455 MetaspaceObj::Type type() const { return AdapterFingerPrintType; }
2456
2457 static bool equals(AdapterFingerPrint* const& fp1, AdapterFingerPrint* const& fp2) {
2458 NOT_PRODUCT(_equals++);
2459 return fp1->equals(fp2);
2460 }
2461
2462 static unsigned int compute_hash(AdapterFingerPrint* const& fp) {
2463 return fp->compute_hash();
2464 }
2467 #if INCLUDE_CDS
2468 static inline bool adapter_fp_equals_compact_hashtable_entry(AdapterHandlerEntry* entry, AdapterFingerPrint* fp, int len_unused) {
2469 return AdapterFingerPrint::equals(entry->fingerprint(), fp);
2470 }
2471
2472 class ArchivedAdapterTable : public OffsetCompactHashtable<
2473 AdapterFingerPrint*,
2474 AdapterHandlerEntry*,
2475 adapter_fp_equals_compact_hashtable_entry> {};
2476 #endif // INCLUDE_CDS
2477
2478 // A hashtable mapping from AdapterFingerPrints to AdapterHandlerEntries
2479 using AdapterHandlerTable = HashTable<AdapterFingerPrint*, AdapterHandlerEntry*, 293,
2480 AnyObj::C_HEAP, mtCode,
2481 AdapterFingerPrint::compute_hash,
2482 AdapterFingerPrint::equals>;
2483 static AdapterHandlerTable* _adapter_handler_table;
2484 static GrowableArray<AdapterHandlerEntry*>* _adapter_handler_list = nullptr;
2485
2486 // Find a entry with the same fingerprint if it exists
2487 AdapterHandlerEntry* AdapterHandlerLibrary::lookup(int total_args_passed, BasicType* sig_bt) {
2488 NOT_PRODUCT(_lookups++);
2489 assert_lock_strong(AdapterHandlerLibrary_lock);
2490 AdapterFingerPrint* fp = AdapterFingerPrint::allocate(total_args_passed, sig_bt);
2491 AdapterHandlerEntry* entry = nullptr;
2492 #if INCLUDE_CDS
2493 // if we are building the archive then the archived adapter table is
2494 // not valid and we need to use the ones added to the runtime table
2495 if (AOTCodeCache::is_using_adapter()) {
2496 // Search archived table first. It is read-only table so can be searched without lock
2497 entry = _aot_adapter_handler_table.lookup(fp, fp->compute_hash(), 0 /* unused */);
2498 #ifndef PRODUCT
2499 if (entry != nullptr) {
2500 _archived_hits++;
2501 }
2502 #endif
2503 }
2504 #endif // INCLUDE_CDS
2505 if (entry == nullptr) {
2506 assert_lock_strong(AdapterHandlerLibrary_lock);
2507 AdapterHandlerEntry** entry_p = _adapter_handler_table->get(fp);
2508 if (entry_p != nullptr) {
2509 entry = *entry_p;
2510 assert(entry->fingerprint()->equals(fp), "fingerprint mismatch key fp %s %s (hash=%d) != found fp %s %s (hash=%d)",
2527 TableStatistics ts = _adapter_handler_table->statistics_calculate(size);
2528 ts.print(tty, "AdapterHandlerTable");
2529 tty->print_cr("AdapterHandlerTable (table_size=%d, entries=%d)",
2530 _adapter_handler_table->table_size(), _adapter_handler_table->number_of_entries());
2531 int total_hits = _archived_hits + _runtime_hits;
2532 tty->print_cr("AdapterHandlerTable: lookups %d equals %d hits %d (archived=%d+runtime=%d)",
2533 _lookups, _equals, total_hits, _archived_hits, _runtime_hits);
2534 }
2535 #endif
2536
2537 // ---------------------------------------------------------------------------
2538 // Implementation of AdapterHandlerLibrary
2539 AdapterHandlerEntry* AdapterHandlerLibrary::_no_arg_handler = nullptr;
2540 AdapterHandlerEntry* AdapterHandlerLibrary::_int_arg_handler = nullptr;
2541 AdapterHandlerEntry* AdapterHandlerLibrary::_obj_arg_handler = nullptr;
2542 AdapterHandlerEntry* AdapterHandlerLibrary::_obj_int_arg_handler = nullptr;
2543 AdapterHandlerEntry* AdapterHandlerLibrary::_obj_obj_arg_handler = nullptr;
2544 #if INCLUDE_CDS
2545 ArchivedAdapterTable AdapterHandlerLibrary::_aot_adapter_handler_table;
2546 #endif // INCLUDE_CDS
2547 static const int AdapterHandlerLibrary_size = 16*K;
2548 BufferBlob* AdapterHandlerLibrary::_buffer = nullptr;
2549 volatile uint AdapterHandlerLibrary::_id_counter = 0;
2550
2551 BufferBlob* AdapterHandlerLibrary::buffer_blob() {
2552 assert(_buffer != nullptr, "should be initialized");
2553 return _buffer;
2554 }
2555
2556 static void post_adapter_creation(const AdapterHandlerEntry* entry) {
2557 if (Forte::is_enabled() || JvmtiExport::should_post_dynamic_code_generated()) {
2558 AdapterBlob* adapter_blob = entry->adapter_blob();
2559 char blob_id[256];
2560 jio_snprintf(blob_id,
2561 sizeof(blob_id),
2562 "%s(%s)",
2563 adapter_blob->name(),
2564 entry->fingerprint()->as_string());
2565 if (Forte::is_enabled()) {
2566 Forte::register_stub(blob_id, adapter_blob->content_begin(), adapter_blob->content_end());
2567 }
2575 void AdapterHandlerLibrary::initialize() {
2576 {
2577 ResourceMark rm;
2578 _adapter_handler_table = new (mtCode) AdapterHandlerTable();
2579 _buffer = BufferBlob::create("adapters", AdapterHandlerLibrary_size);
2580 }
2581
2582 #if INCLUDE_CDS
2583 // Link adapters in AOT Cache to their code in AOT Code Cache
2584 if (AOTCodeCache::is_using_adapter() && !_aot_adapter_handler_table.empty()) {
2585 link_aot_adapters();
2586 lookup_simple_adapters();
2587 return;
2588 }
2589 #endif // INCLUDE_CDS
2590
2591 ResourceMark rm;
2592 {
2593 MutexLocker mu(AdapterHandlerLibrary_lock);
2594
2595 _no_arg_handler = create_adapter(0, nullptr);
2596
2597 BasicType obj_args[] = { T_OBJECT };
2598 _obj_arg_handler = create_adapter(1, obj_args);
2599
2600 BasicType int_args[] = { T_INT };
2601 _int_arg_handler = create_adapter(1, int_args);
2602
2603 BasicType obj_int_args[] = { T_OBJECT, T_INT };
2604 _obj_int_arg_handler = create_adapter(2, obj_int_args);
2605
2606 BasicType obj_obj_args[] = { T_OBJECT, T_OBJECT };
2607 _obj_obj_arg_handler = create_adapter(2, obj_obj_args);
2608
2609 // we should always get an entry back but we don't have any
2610 // associated blob on Zero
2611 assert(_no_arg_handler != nullptr &&
2612 _obj_arg_handler != nullptr &&
2613 _int_arg_handler != nullptr &&
2614 _obj_int_arg_handler != nullptr &&
2615 _obj_obj_arg_handler != nullptr, "Initial adapter handlers must be properly created");
2616 }
2617
2618 // Outside of the lock
2619 #ifndef ZERO
2620 // no blobs to register when we are on Zero
2621 post_adapter_creation(_no_arg_handler);
2622 post_adapter_creation(_obj_arg_handler);
2623 post_adapter_creation(_int_arg_handler);
2624 post_adapter_creation(_obj_int_arg_handler);
2625 post_adapter_creation(_obj_obj_arg_handler);
2626 #endif // ZERO
2627 }
2628
2629 AdapterHandlerEntry* AdapterHandlerLibrary::new_entry(AdapterFingerPrint* fingerprint) {
2630 uint id = (uint)AtomicAccess::add((int*)&_id_counter, 1);
2631 assert(id > 0, "we can never overflow because AOT cache cannot contain more than 2^32 methods");
2632 return AdapterHandlerEntry::allocate(id, fingerprint);
2633 }
2634
2635 AdapterHandlerEntry* AdapterHandlerLibrary::get_simple_adapter(const methodHandle& method) {
2636 int total_args_passed = method->size_of_parameters(); // All args on stack
2637 if (total_args_passed == 0) {
2638 return _no_arg_handler;
2639 } else if (total_args_passed == 1) {
2640 if (!method->is_static()) {
2641 return _obj_arg_handler;
2642 }
2643 switch (method->signature()->char_at(1)) {
2644 case JVM_SIGNATURE_CLASS:
2645 case JVM_SIGNATURE_ARRAY:
2646 return _obj_arg_handler;
2647 case JVM_SIGNATURE_INT:
2648 case JVM_SIGNATURE_BOOLEAN:
2649 case JVM_SIGNATURE_CHAR:
2650 case JVM_SIGNATURE_BYTE:
2651 case JVM_SIGNATURE_SHORT:
2652 return _int_arg_handler;
2653 }
2654 } else if (total_args_passed == 2 &&
2655 !method->is_static()) {
2656 switch (method->signature()->char_at(1)) {
2657 case JVM_SIGNATURE_CLASS:
2658 case JVM_SIGNATURE_ARRAY:
2659 return _obj_obj_arg_handler;
2660 case JVM_SIGNATURE_INT:
2661 case JVM_SIGNATURE_BOOLEAN:
2662 case JVM_SIGNATURE_CHAR:
2663 case JVM_SIGNATURE_BYTE:
2664 case JVM_SIGNATURE_SHORT:
2665 return _obj_int_arg_handler;
2666 }
2667 }
2668 return nullptr;
2669 }
2670
2671 class AdapterSignatureIterator : public SignatureIterator {
2672 private:
2673 BasicType stack_sig_bt[16];
2674 BasicType* sig_bt;
2675 int index;
2676
2677 public:
2678 AdapterSignatureIterator(Symbol* signature,
2679 fingerprint_t fingerprint,
2680 bool is_static,
2681 int total_args_passed) :
2682 SignatureIterator(signature, fingerprint),
2683 index(0)
2684 {
2685 sig_bt = (total_args_passed <= 16) ? stack_sig_bt : NEW_RESOURCE_ARRAY(BasicType, total_args_passed);
2686 if (!is_static) { // Pass in receiver first
2687 sig_bt[index++] = T_OBJECT;
2688 }
2689 do_parameters_on(this);
2690 }
2691
2692 BasicType* basic_types() {
2693 return sig_bt;
2694 }
2695
2696 #ifdef ASSERT
2697 int slots() {
2698 return index;
2699 }
2700 #endif
2701
2702 private:
2703
2704 friend class SignatureIterator; // so do_parameters_on can call do_type
2705 void do_type(BasicType type) {
2706 sig_bt[index++] = type;
2707 if (type == T_LONG || type == T_DOUBLE) {
2708 sig_bt[index++] = T_VOID; // Longs & doubles take 2 Java slots
2709 }
2710 }
2711 };
2712
2713
2714 const char* AdapterHandlerEntry::_entry_names[] = {
2715 "i2c", "c2i", "c2i_unverified", "c2i_no_clinit_check"
2716 };
2717
2718 #ifdef ASSERT
2719 void AdapterHandlerLibrary::verify_adapter_sharing(int total_args_passed, BasicType* sig_bt, AdapterHandlerEntry* cached_entry) {
2720 // we can only check for the same code if there is any
2721 #ifndef ZERO
2722 AdapterHandlerEntry* comparison_entry = create_adapter(total_args_passed, sig_bt, true);
2723 assert(comparison_entry->adapter_blob() == nullptr, "no blob should be created when creating an adapter for comparison");
2724 assert(comparison_entry->compare_code(cached_entry), "code must match");
2725 // Release the one just created
2726 AdapterHandlerEntry::deallocate(comparison_entry);
2727 # endif // ZERO
2728 }
2729 #endif /* ASSERT*/
2730
2731 AdapterHandlerEntry* AdapterHandlerLibrary::get_adapter(const methodHandle& method) {
2732 assert(!method->is_abstract(), "abstract methods do not have adapters");
2733 // Use customized signature handler. Need to lock around updates to
2734 // the _adapter_handler_table (it is not safe for concurrent readers
2735 // and a single writer: this could be fixed if it becomes a
2736 // problem).
2737
2738 // Fast-path for trivial adapters
2739 AdapterHandlerEntry* entry = get_simple_adapter(method);
2740 if (entry != nullptr) {
2741 return entry;
2742 }
2743
2744 ResourceMark rm;
2745 bool new_entry = false;
2746
2747 // Fill in the signature array, for the calling-convention call.
2748 int total_args_passed = method->size_of_parameters(); // All args on stack
2749
2750 AdapterSignatureIterator si(method->signature(), method->constMethod()->fingerprint(),
2751 method->is_static(), total_args_passed);
2752 assert(si.slots() == total_args_passed, "");
2753 BasicType* sig_bt = si.basic_types();
2754 {
2755 MutexLocker mu(AdapterHandlerLibrary_lock);
2756
2757 // Lookup method signature's fingerprint
2758 entry = lookup(total_args_passed, sig_bt);
2759
2760 if (entry != nullptr) {
2761 #ifndef ZERO
2762 assert(entry->is_linked(), "AdapterHandlerEntry must have been linked");
2763 #endif
2764 #ifdef ASSERT
2765 if (!entry->in_aot_cache() && VerifyAdapterSharing) {
2766 verify_adapter_sharing(total_args_passed, sig_bt, entry);
2767 }
2768 #endif
2769 } else {
2770 entry = create_adapter(total_args_passed, sig_bt);
2771 if (entry != nullptr) {
2772 new_entry = true;
2773 }
2774 }
2775 }
2776
2777 // Outside of the lock
2778 if (new_entry) {
2779 post_adapter_creation(entry);
2780 }
2781 return entry;
2782 }
2783
2784 void AdapterHandlerLibrary::lookup_aot_cache(AdapterHandlerEntry* handler) {
2785 ResourceMark rm;
2786 const char* name = AdapterHandlerLibrary::name(handler);
2787 const uint32_t id = AdapterHandlerLibrary::id(handler);
2788
2789 CodeBlob* blob = AOTCodeCache::load_code_blob(AOTCodeEntry::Adapter, id, name);
2790 if (blob != nullptr) {
2805 }
2806 insts_size = adapter_blob->code_size();
2807 st->print_cr("i2c argument handler for: %s %s (%d bytes generated)",
2808 handler->fingerprint()->as_basic_args_string(),
2809 handler->fingerprint()->as_string(), insts_size);
2810 st->print_cr("c2i argument handler starts at " INTPTR_FORMAT, p2i(handler->get_c2i_entry()));
2811 if (Verbose || PrintStubCode) {
2812 address first_pc = adapter_blob->content_begin();
2813 if (first_pc != nullptr) {
2814 Disassembler::decode(first_pc, first_pc + insts_size, st, &adapter_blob->asm_remarks());
2815 st->cr();
2816 }
2817 }
2818 }
2819 #endif // PRODUCT
2820
2821 void AdapterHandlerLibrary::address_to_offset(address entry_address[AdapterBlob::ENTRY_COUNT],
2822 int entry_offset[AdapterBlob::ENTRY_COUNT]) {
2823 entry_offset[AdapterBlob::I2C] = 0;
2824 entry_offset[AdapterBlob::C2I] = entry_address[AdapterBlob::C2I] - entry_address[AdapterBlob::I2C];
2825 entry_offset[AdapterBlob::C2I_Unverified] = entry_address[AdapterBlob::C2I_Unverified] - entry_address[AdapterBlob::I2C];
2826 if (entry_address[AdapterBlob::C2I_No_Clinit_Check] == nullptr) {
2827 entry_offset[AdapterBlob::C2I_No_Clinit_Check] = -1;
2828 } else {
2829 entry_offset[AdapterBlob::C2I_No_Clinit_Check] = entry_address[AdapterBlob::C2I_No_Clinit_Check] - entry_address[AdapterBlob::I2C];
2830 }
2831 }
2832
2833 bool AdapterHandlerLibrary::generate_adapter_code(AdapterHandlerEntry* handler,
2834 int total_args_passed,
2835 BasicType* sig_bt,
2836 bool is_transient) {
2837 if (log_is_enabled(Info, perf, class, link)) {
2838 ClassLoader::perf_method_adapters_count()->inc();
2839 }
2840
2841 #ifndef ZERO
2842 BufferBlob* buf = buffer_blob(); // the temporary code buffer in CodeCache
2843 CodeBuffer buffer(buf);
2844 short buffer_locs[20];
2845 buffer.insts()->initialize_shared_locs((relocInfo*)buffer_locs,
2846 sizeof(buffer_locs)/sizeof(relocInfo));
2847 MacroAssembler masm(&buffer);
2848 VMRegPair stack_regs[16];
2849 VMRegPair* regs = (total_args_passed <= 16) ? stack_regs : NEW_RESOURCE_ARRAY(VMRegPair, total_args_passed);
2850
2851 // Get a description of the compiled java calling convention and the largest used (VMReg) stack slot usage
2852 int comp_args_on_stack = SharedRuntime::java_calling_convention(sig_bt, regs, total_args_passed);
2853 address entry_address[AdapterBlob::ENTRY_COUNT];
2854 SharedRuntime::generate_i2c2i_adapters(&masm,
2855 total_args_passed,
2856 comp_args_on_stack,
2857 sig_bt,
2858 regs,
2859 entry_address);
2860 // On zero there is no code to save and no need to create a blob and
2861 // or relocate the handler.
2862 int entry_offset[AdapterBlob::ENTRY_COUNT];
2863 address_to_offset(entry_address, entry_offset);
2864 #ifdef ASSERT
2865 if (VerifyAdapterSharing) {
2866 handler->save_code(buf->code_begin(), buffer.insts_size());
2867 if (is_transient) {
2868 return true;
2869 }
2870 }
2871 #endif
2872 AdapterBlob* adapter_blob = AdapterBlob::create(&buffer, entry_offset);
2873 if (adapter_blob == nullptr) {
2874 // CodeCache is full, disable compilation
2875 // Ought to log this but compile log is only per compile thread
2876 // and we're some non descript Java thread.
2877 return false;
2878 }
2879 handler->set_adapter_blob(adapter_blob);
2880 if (!is_transient && AOTCodeCache::is_dumping_adapter()) {
2881 // try to save generated code
2882 const char* name = AdapterHandlerLibrary::name(handler);
2883 const uint32_t id = AdapterHandlerLibrary::id(handler);
2884 bool success = AOTCodeCache::store_code_blob(*adapter_blob, AOTCodeEntry::Adapter, id, name);
2885 assert(success || !AOTCodeCache::is_dumping_adapter(), "caching of adapter must be disabled");
2886 }
2887 #endif // ZERO
2888
2889 #ifndef PRODUCT
2890 // debugging support
2891 if (PrintAdapterHandlers || PrintStubCode) {
2892 print_adapter_handler_info(tty, handler);
2893 }
2894 #endif
2895
2896 return true;
2897 }
2898
2899 AdapterHandlerEntry* AdapterHandlerLibrary::create_adapter(int total_args_passed,
2900 BasicType* sig_bt,
2901 bool is_transient) {
2902 AdapterFingerPrint* fp = AdapterFingerPrint::allocate(total_args_passed, sig_bt);
2903 AdapterHandlerEntry* handler = AdapterHandlerLibrary::new_entry(fp);
2904 if (!generate_adapter_code(handler, total_args_passed, sig_bt, is_transient)) {
2905 AdapterHandlerEntry::deallocate(handler);
2906 return nullptr;
2907 }
2908 if (!is_transient) {
2909 assert_lock_strong(AdapterHandlerLibrary_lock);
2910 _adapter_handler_table->put(fp, handler);
2911 }
2912 return handler;
2913 }
2914
2915 #if INCLUDE_CDS
2916 void AdapterHandlerEntry::remove_unshareable_info() {
2917 #ifdef ASSERT
2918 _saved_code = nullptr;
2919 _saved_code_length = 0;
2920 #endif // ASSERT
2921 _adapter_blob = nullptr;
2922 _linked = false;
2923 }
2924
2925 class CopyAdapterTableToArchive : StackObj {
2926 private:
2927 CompactHashtableWriter* _writer;
2928 ArchiveBuilder* _builder;
2929 public:
2930 CopyAdapterTableToArchive(CompactHashtableWriter* writer) : _writer(writer),
2931 _builder(ArchiveBuilder::current())
2932 {}
2933
2934 bool do_entry(AdapterFingerPrint* fp, AdapterHandlerEntry* entry) {
2935 LogStreamHandle(Trace, aot) lsh;
2936 if (ArchiveBuilder::current()->has_been_archived((address)entry)) {
2937 assert(ArchiveBuilder::current()->has_been_archived((address)fp), "must be");
2938 AdapterFingerPrint* buffered_fp = ArchiveBuilder::current()->get_buffered_addr(fp);
2939 assert(buffered_fp != nullptr,"sanity check");
2940 AdapterHandlerEntry* buffered_entry = ArchiveBuilder::current()->get_buffered_addr(entry);
2941 assert(buffered_entry != nullptr,"sanity check");
2942
2982 }
2983 #endif
2984 }
2985
2986 // This method is used during production run to link archived adapters (stored in AOT Cache)
2987 // to their code in AOT Code Cache
2988 void AdapterHandlerEntry::link() {
2989 ResourceMark rm;
2990 assert(_fingerprint != nullptr, "_fingerprint must not be null");
2991 bool generate_code = false;
2992 // Generate code only if AOTCodeCache is not available, or
2993 // caching adapters is disabled, or we fail to link
2994 // the AdapterHandlerEntry to its code in the AOTCodeCache
2995 if (AOTCodeCache::is_using_adapter()) {
2996 AdapterHandlerLibrary::link_aot_adapter_handler(this);
2997 // If link_aot_adapter_handler() succeeds, _adapter_blob will be non-null
2998 if (_adapter_blob == nullptr) {
2999 log_warning(aot)("Failed to link AdapterHandlerEntry (fp=%s) to its code in the AOT code cache", _fingerprint->as_basic_args_string());
3000 generate_code = true;
3001 }
3002 } else {
3003 generate_code = true;
3004 }
3005 if (generate_code) {
3006 int nargs;
3007 BasicType* bt = _fingerprint->as_basic_type(nargs);
3008 if (!AdapterHandlerLibrary::generate_adapter_code(this, nargs, bt, /* is_transient */ false)) {
3009 // Don't throw exceptions during VM initialization because java.lang.* classes
3010 // might not have been initialized, causing problems when constructing the
3011 // Java exception object.
3012 vm_exit_during_initialization("Out of space in CodeCache for adapters");
3013 }
3014 }
3015 if (_adapter_blob != nullptr) {
3016 post_adapter_creation(this);
3017 }
3018 assert(_linked, "AdapterHandlerEntry must now be linked");
3019 }
3020
3021 void AdapterHandlerLibrary::link_aot_adapters() {
3022 uint max_id = 0;
3023 assert(AOTCodeCache::is_using_adapter(), "AOT adapters code should be available");
3024 /* It is possible that some adapters generated in assembly phase are not stored in the cache.
3025 * That implies adapter ids of the adapters in the cache may not be contiguous.
3026 * If the size of the _aot_adapter_handler_table is used to initialize _id_counter, then it may
3027 * result in collision of adapter ids between AOT stored handlers and runtime generated handlers.
3028 * To avoid such situation, initialize the _id_counter with the largest adapter id among the AOT stored handlers.
3029 */
3030 _aot_adapter_handler_table.iterate_all([&](AdapterHandlerEntry* entry) {
3031 assert(!entry->is_linked(), "AdapterHandlerEntry is already linked!");
3032 entry->link();
3033 max_id = MAX2(max_id, entry->id());
3034 });
3035 // Set adapter id to the maximum id found in the AOTCache
3036 assert(_id_counter == 0, "Did not expect new AdapterHandlerEntry to be created at this stage");
3037 _id_counter = max_id;
3038 }
3039
3040 // This method is called during production run to lookup simple adapters
3041 // in the archived adapter handler table
3042 void AdapterHandlerLibrary::lookup_simple_adapters() {
3043 assert(!_aot_adapter_handler_table.empty(), "archived adapter handler table is empty");
3044
3045 MutexLocker mu(AdapterHandlerLibrary_lock);
3046 _no_arg_handler = lookup(0, nullptr);
3047
3048 BasicType obj_args[] = { T_OBJECT };
3049 _obj_arg_handler = lookup(1, obj_args);
3050
3051 BasicType int_args[] = { T_INT };
3052 _int_arg_handler = lookup(1, int_args);
3053
3054 BasicType obj_int_args[] = { T_OBJECT, T_INT };
3055 _obj_int_arg_handler = lookup(2, obj_int_args);
3056
3057 BasicType obj_obj_args[] = { T_OBJECT, T_OBJECT };
3058 _obj_obj_arg_handler = lookup(2, obj_obj_args);
3059
3060 assert(_no_arg_handler != nullptr &&
3061 _obj_arg_handler != nullptr &&
3062 _int_arg_handler != nullptr &&
3063 _obj_int_arg_handler != nullptr &&
3064 _obj_obj_arg_handler != nullptr, "Initial adapters not found in archived adapter handler table");
3065 assert(_no_arg_handler->is_linked() &&
3066 _obj_arg_handler->is_linked() &&
3067 _int_arg_handler->is_linked() &&
3068 _obj_int_arg_handler->is_linked() &&
3069 _obj_obj_arg_handler->is_linked(), "Initial adapters not in linked state");
3070 }
3071 #endif // INCLUDE_CDS
3072
3073 void AdapterHandlerEntry::metaspace_pointers_do(MetaspaceClosure* it) {
3074 LogStreamHandle(Trace, aot) lsh;
3075 if (lsh.is_enabled()) {
3076 lsh.print("Iter(AdapterHandlerEntry): %p(%s)", this, _fingerprint->as_basic_args_string());
3077 lsh.cr();
3078 }
3079 it->push(&_fingerprint);
3080 }
3081
3082 AdapterHandlerEntry::~AdapterHandlerEntry() {
3083 if (_fingerprint != nullptr) {
3084 AdapterFingerPrint::deallocate(_fingerprint);
3085 _fingerprint = nullptr;
3086 }
3087 #ifdef ASSERT
3088 FREE_C_HEAP_ARRAY(_saved_code);
3089 #endif
3090 FreeHeap(this);
3091 }
3092
3093
3094 #ifdef ASSERT
3095 // Capture the code before relocation so that it can be compared
3096 // against other versions. If the code is captured after relocation
3097 // then relative instructions won't be equivalent.
3098 void AdapterHandlerEntry::save_code(unsigned char* buffer, int length) {
3099 _saved_code = NEW_C_HEAP_ARRAY(unsigned char, length, mtCode);
3100 _saved_code_length = length;
3101 memcpy(_saved_code, buffer, length);
3102 }
3103
3104
3105 bool AdapterHandlerEntry::compare_code(AdapterHandlerEntry* other) {
3106 assert(_saved_code != nullptr && other->_saved_code != nullptr, "code not saved");
3154
3155 struct { double data[20]; } locs_buf;
3156 struct { double data[20]; } stubs_locs_buf;
3157 buffer.insts()->initialize_shared_locs((relocInfo*)&locs_buf, sizeof(locs_buf) / sizeof(relocInfo));
3158 #if defined(AARCH64) || defined(PPC64)
3159 // On AArch64 with ZGC and nmethod entry barriers, we need all oops to be
3160 // in the constant pool to ensure ordering between the barrier and oops
3161 // accesses. For native_wrappers we need a constant.
3162 // On PPC64 the continuation enter intrinsic needs the constant pool for the compiled
3163 // static java call that is resolved in the runtime.
3164 if (PPC64_ONLY(method->is_continuation_enter_intrinsic() &&) true) {
3165 buffer.initialize_consts_size(8 PPC64_ONLY(+ 24));
3166 }
3167 #endif
3168 buffer.stubs()->initialize_shared_locs((relocInfo*)&stubs_locs_buf, sizeof(stubs_locs_buf) / sizeof(relocInfo));
3169 MacroAssembler _masm(&buffer);
3170
3171 // Fill in the signature array, for the calling-convention call.
3172 const int total_args_passed = method->size_of_parameters();
3173
3174 VMRegPair stack_regs[16];
3175 VMRegPair* regs = (total_args_passed <= 16) ? stack_regs : NEW_RESOURCE_ARRAY(VMRegPair, total_args_passed);
3176
3177 AdapterSignatureIterator si(method->signature(), method->constMethod()->fingerprint(),
3178 method->is_static(), total_args_passed);
3179 BasicType* sig_bt = si.basic_types();
3180 assert(si.slots() == total_args_passed, "");
3181 BasicType ret_type = si.return_type();
3182
3183 // Now get the compiled-Java arguments layout.
3184 SharedRuntime::java_calling_convention(sig_bt, regs, total_args_passed);
3185
3186 // Generate the compiled-to-native wrapper code
3187 nm = SharedRuntime::generate_native_wrapper(&_masm, method, compile_id, sig_bt, regs, ret_type);
3188
3189 if (nm != nullptr) {
3190 {
3191 MutexLocker pl(NMethodState_lock, Mutex::_no_safepoint_check_flag);
3192 if (nm->make_in_use()) {
3193 method->set_code(method, nm);
3194 }
3195 }
3196
3197 DirectiveSet* directive = DirectivesStack::getMatchingDirective(method, CompileBroker::compiler(CompLevel_simple));
3198 if (directive->PrintAssemblyOption) {
3199 nm->print_code();
3200 }
3201 DirectivesStack::release(directive);
3409 if (b == handler->adapter_blob()) {
3410 found = true;
3411 st->print("Adapter for signature: ");
3412 handler->print_adapter_on(st);
3413 return false; // abort iteration
3414 } else {
3415 return true; // keep looking
3416 }
3417 };
3418 assert_locked_or_safepoint(AdapterHandlerLibrary_lock);
3419 _adapter_handler_table->iterate(findblob_runtime_table);
3420 }
3421 assert(found, "Should have found handler");
3422 }
3423
3424 void AdapterHandlerEntry::print_adapter_on(outputStream* st) const {
3425 st->print("AHE@" INTPTR_FORMAT ": %s", p2i(this), fingerprint()->as_string());
3426 if (adapter_blob() != nullptr) {
3427 st->print(" i2c: " INTPTR_FORMAT, p2i(get_i2c_entry()));
3428 st->print(" c2i: " INTPTR_FORMAT, p2i(get_c2i_entry()));
3429 st->print(" c2iUV: " INTPTR_FORMAT, p2i(get_c2i_unverified_entry()));
3430 if (get_c2i_no_clinit_check_entry() != nullptr) {
3431 st->print(" c2iNCI: " INTPTR_FORMAT, p2i(get_c2i_no_clinit_check_entry()));
3432 }
3433 }
3434 st->cr();
3435 }
3436
3437 #ifndef PRODUCT
3438
3439 void AdapterHandlerLibrary::print_statistics() {
3440 print_table_statistics();
3441 }
3442
3443 #endif /* PRODUCT */
3444
3445 JRT_LEAF(void, SharedRuntime::enable_stack_reserved_zone(JavaThread* current))
3446 assert(current == JavaThread::current(), "pre-condition");
3447 StackOverflow* overflow_state = current->stack_overflow_state();
3448 overflow_state->enable_stack_reserved_zone(/*check_if_disabled*/true);
3449 overflow_state->set_reserved_stack_activation(current->stack_base());
3496 event.set_method(method);
3497 event.commit();
3498 }
3499 }
3500 }
3501 return activation;
3502 }
3503
3504 void SharedRuntime::on_slowpath_allocation_exit(JavaThread* current) {
3505 // After any safepoint, just before going back to compiled code,
3506 // we inform the GC that we will be doing initializing writes to
3507 // this object in the future without emitting card-marks, so
3508 // GC may take any compensating steps.
3509
3510 oop new_obj = current->vm_result_oop();
3511 if (new_obj == nullptr) return;
3512
3513 BarrierSet *bs = BarrierSet::barrier_set();
3514 bs->on_slowpath_allocation_exit(current, new_obj);
3515 }
|
30 #include "classfile/javaClasses.inline.hpp"
31 #include "classfile/stringTable.hpp"
32 #include "classfile/vmClasses.hpp"
33 #include "classfile/vmSymbols.hpp"
34 #include "code/aotCodeCache.hpp"
35 #include "code/codeCache.hpp"
36 #include "code/compiledIC.hpp"
37 #include "code/nmethod.inline.hpp"
38 #include "code/scopeDesc.hpp"
39 #include "code/vtableStubs.hpp"
40 #include "compiler/abstractCompiler.hpp"
41 #include "compiler/compileBroker.hpp"
42 #include "compiler/disassembler.hpp"
43 #include "gc/shared/barrierSet.hpp"
44 #include "gc/shared/collectedHeap.hpp"
45 #include "interpreter/interpreter.hpp"
46 #include "interpreter/interpreterRuntime.hpp"
47 #include "jfr/jfrEvents.hpp"
48 #include "jvm.h"
49 #include "logging/log.hpp"
50 #include "memory/oopFactory.hpp"
51 #include "memory/resourceArea.hpp"
52 #include "memory/universe.hpp"
53 #include "metaprogramming/primitiveConversions.hpp"
54 #include "oops/access.hpp"
55 #include "oops/fieldStreams.inline.hpp"
56 #include "oops/inlineKlass.inline.hpp"
57 #include "oops/klass.hpp"
58 #include "oops/method.inline.hpp"
59 #include "oops/objArrayKlass.hpp"
60 #include "oops/objArrayOop.inline.hpp"
61 #include "oops/oop.inline.hpp"
62 #include "prims/forte.hpp"
63 #include "prims/jvmtiExport.hpp"
64 #include "prims/jvmtiThreadState.hpp"
65 #include "prims/methodHandles.hpp"
66 #include "prims/nativeLookup.hpp"
67 #include "runtime/arguments.hpp"
68 #include "runtime/atomicAccess.hpp"
69 #include "runtime/basicLock.inline.hpp"
70 #include "runtime/frame.inline.hpp"
71 #include "runtime/handles.inline.hpp"
72 #include "runtime/init.hpp"
73 #include "runtime/interfaceSupport.inline.hpp"
74 #include "runtime/java.hpp"
75 #include "runtime/javaCalls.hpp"
76 #include "runtime/jniHandles.inline.hpp"
77 #include "runtime/osThread.hpp"
78 #include "runtime/perfData.hpp"
79 #include "runtime/sharedRuntime.hpp"
80 #include "runtime/signature.hpp"
81 #include "runtime/stackWatermarkSet.hpp"
82 #include "runtime/stubRoutines.hpp"
83 #include "runtime/synchronizer.hpp"
84 #include "runtime/timerTrace.hpp"
85 #include "runtime/vframe.inline.hpp"
86 #include "runtime/vframeArray.hpp"
87 #include "runtime/vm_version.hpp"
88 #include "utilities/copy.hpp"
89 #include "utilities/dtrace.hpp"
90 #include "utilities/events.hpp"
91 #include "utilities/exceptions.hpp"
92 #include "utilities/globalDefinitions.hpp"
93 #include "utilities/hashTable.hpp"
94 #include "utilities/macros.hpp"
95 #include "utilities/xmlstream.hpp"
96 #ifdef COMPILER1
97 #include "c1/c1_Runtime1.hpp"
98 #endif
99 #ifdef COMPILER2
100 #include "opto/runtime.hpp"
1224 // for a call current in progress, i.e., arguments has been pushed on stack
1225 // but callee has not been invoked yet. Caller frame must be compiled.
1226 Handle SharedRuntime::find_callee_info_helper(vframeStream& vfst, Bytecodes::Code& bc,
1227 CallInfo& callinfo, TRAPS) {
1228 Handle receiver;
1229 Handle nullHandle; // create a handy null handle for exception returns
1230 JavaThread* current = THREAD;
1231
1232 assert(!vfst.at_end(), "Java frame must exist");
1233
1234 // Find caller and bci from vframe
1235 methodHandle caller(current, vfst.method());
1236 int bci = vfst.bci();
1237
1238 if (caller->is_continuation_enter_intrinsic()) {
1239 bc = Bytecodes::_invokestatic;
1240 LinkResolver::resolve_continuation_enter(callinfo, CHECK_NH);
1241 return receiver;
1242 }
1243
1244 // Substitutability test implementation piggy backs on static call resolution
1245 Bytecodes::Code code = caller->java_code_at(bci);
1246 if (code == Bytecodes::_if_acmpeq || code == Bytecodes::_if_acmpne) {
1247 bc = Bytecodes::_invokestatic;
1248 methodHandle attached_method(THREAD, extract_attached_method(vfst));
1249 assert(attached_method.not_null(), "must have attached method");
1250 vmClasses::ValueObjectMethods_klass()->initialize(CHECK_NH);
1251 LinkResolver::resolve_invoke(callinfo, receiver, attached_method, bc, false, CHECK_NH);
1252 #ifdef ASSERT
1253 Symbol* subst_method_name = vmSymbols::isSubstitutable_name();
1254 Method* is_subst = vmClasses::ValueObjectMethods_klass()->find_method(subst_method_name, vmSymbols::object_object_boolean_signature());
1255 assert(callinfo.selected_method() == is_subst, "must be isSubstitutable method");
1256 #endif
1257 return receiver;
1258 }
1259
1260 Bytecode_invoke bytecode(caller, bci);
1261 int bytecode_index = bytecode.index();
1262 bc = bytecode.invoke_code();
1263
1264 methodHandle attached_method(current, extract_attached_method(vfst));
1265 if (attached_method.not_null()) {
1266 Method* callee = bytecode.static_target(CHECK_NH);
1267 vmIntrinsics::ID id = callee->intrinsic_id();
1268 // When VM replaces MH.invokeBasic/linkTo* call with a direct/virtual call,
1269 // it attaches statically resolved method to the call site.
1270 if (MethodHandles::is_signature_polymorphic(id) &&
1271 MethodHandles::is_signature_polymorphic_intrinsic(id)) {
1272 bc = MethodHandles::signature_polymorphic_intrinsic_bytecode(id);
1273
1274 // Adjust invocation mode according to the attached method.
1275 switch (bc) {
1276 case Bytecodes::_invokevirtual:
1277 if (attached_method->method_holder()->is_interface()) {
1278 bc = Bytecodes::_invokeinterface;
1279 }
1280 break;
1281 case Bytecodes::_invokeinterface:
1282 if (!attached_method->method_holder()->is_interface()) {
1283 bc = Bytecodes::_invokevirtual;
1284 }
1285 break;
1286 case Bytecodes::_invokehandle:
1287 if (!MethodHandles::is_signature_polymorphic_method(attached_method())) {
1288 bc = attached_method->is_static() ? Bytecodes::_invokestatic
1289 : Bytecodes::_invokevirtual;
1290 }
1291 break;
1292 default:
1293 break;
1294 }
1295 } else {
1296 assert(attached_method->has_scalarized_args(), "invalid use of attached method");
1297 if (!attached_method->method_holder()->is_inline_klass()) {
1298 // Ignore the attached method in this case to not confuse below code
1299 attached_method = methodHandle(current, nullptr);
1300 }
1301 }
1302 }
1303
1304 assert(bc != Bytecodes::_illegal, "not initialized");
1305
1306 bool has_receiver = bc != Bytecodes::_invokestatic &&
1307 bc != Bytecodes::_invokedynamic &&
1308 bc != Bytecodes::_invokehandle;
1309 bool check_null_and_abstract = true;
1310
1311 // Find receiver for non-static call
1312 if (has_receiver) {
1313 // This register map must be update since we need to find the receiver for
1314 // compiled frames. The receiver might be in a register.
1315 RegisterMap reg_map2(current,
1316 RegisterMap::UpdateMap::include,
1317 RegisterMap::ProcessFrames::include,
1318 RegisterMap::WalkContinuation::skip);
1319 frame stubFrame = current->last_frame();
1320 // Caller-frame is a compiled frame
1321 frame callerFrame = stubFrame.sender(®_map2);
1322
1323 Method* callee = attached_method();
1324 if (callee == nullptr) {
1325 callee = bytecode.static_target(CHECK_NH);
1326 if (callee == nullptr) {
1327 THROW_(vmSymbols::java_lang_NoSuchMethodException(), nullHandle);
1328 }
1329 }
1330 bool caller_is_c1 = callerFrame.is_compiled_frame() && callerFrame.cb()->as_nmethod()->is_compiled_by_c1();
1331 if (!caller_is_c1 && callee->is_scalarized_arg(0)) {
1332 // If the receiver is an inline type that is passed as fields, no oop is available
1333 // Resolve the call without receiver null checking.
1334 assert(!callee->mismatch(), "calls with inline type receivers should never mismatch");
1335 assert(attached_method.not_null() && !attached_method->is_abstract(), "must have non-abstract attached method");
1336 if (bc == Bytecodes::_invokeinterface) {
1337 bc = Bytecodes::_invokevirtual; // C2 optimistically replaces interface calls by virtual calls
1338 }
1339 check_null_and_abstract = false;
1340 } else {
1341 // Retrieve from a compiled argument list
1342 receiver = Handle(current, callerFrame.retrieve_receiver(®_map2));
1343 assert(oopDesc::is_oop_or_null(receiver()), "");
1344 if (receiver.is_null()) {
1345 THROW_(vmSymbols::java_lang_NullPointerException(), nullHandle);
1346 }
1347 }
1348 }
1349
1350 // Resolve method
1351 if (attached_method.not_null()) {
1352 // Parameterized by attached method.
1353 LinkResolver::resolve_invoke(callinfo, receiver, attached_method, bc, check_null_and_abstract, CHECK_NH);
1354 } else {
1355 // Parameterized by bytecode.
1356 constantPoolHandle constants(current, caller->constants());
1357 LinkResolver::resolve_invoke(callinfo, receiver, constants, bytecode_index, bc, CHECK_NH);
1358 }
1359
1360 #ifdef ASSERT
1361 // Check that the receiver klass is of the right subtype and that it is initialized for virtual calls
1362 if (has_receiver && check_null_and_abstract) {
1363 assert(receiver.not_null(), "should have thrown exception");
1364 Klass* receiver_klass = receiver->klass();
1365 Klass* rk = nullptr;
1366 if (attached_method.not_null()) {
1367 // In case there's resolved method attached, use its holder during the check.
1368 rk = attached_method->method_holder();
1369 } else {
1370 // Klass is already loaded.
1371 constantPoolHandle constants(current, caller->constants());
1372 rk = constants->klass_ref_at(bytecode_index, bc, CHECK_NH);
1373 }
1374 Klass* static_receiver_klass = rk;
1375 assert(receiver_klass->is_subtype_of(static_receiver_klass),
1376 "actual receiver must be subclass of static receiver klass");
1377 if (receiver_klass->is_instance_klass()) {
1378 if (InstanceKlass::cast(receiver_klass)->is_not_initialized()) {
1379 tty->print_cr("ERROR: Klass not yet initialized!!");
1380 receiver_klass->print();
1381 }
1382 assert(!InstanceKlass::cast(receiver_klass)->is_not_initialized(), "receiver_klass must be initialized");
1383 }
1384 }
1385 #endif
1386
1387 return receiver;
1388 }
1389
1390 methodHandle SharedRuntime::find_callee_method(bool& caller_does_not_scalarize, TRAPS) {
1391 JavaThread* current = THREAD;
1392 ResourceMark rm(current);
1393 // We need first to check if any Java activations (compiled, interpreted)
1394 // exist on the stack since last JavaCall. If not, we need
1395 // to get the target method from the JavaCall wrapper.
1396 vframeStream vfst(current, true); // Do not skip any javaCalls
1397 methodHandle callee_method;
1398 if (vfst.at_end()) {
1399 // No Java frames were found on stack since we did the JavaCall.
1400 // Hence the stack can only contain an entry_frame. We need to
1401 // find the target method from the stub frame.
1402 RegisterMap reg_map(current,
1403 RegisterMap::UpdateMap::skip,
1404 RegisterMap::ProcessFrames::include,
1405 RegisterMap::WalkContinuation::skip);
1406 frame fr = current->last_frame();
1407 assert(fr.is_runtime_frame(), "must be a runtimeStub");
1408 fr = fr.sender(®_map);
1409 assert(fr.is_entry_frame(), "must be");
1410 // fr is now pointing to the entry frame.
1411 callee_method = methodHandle(current, fr.entry_frame_call_wrapper()->callee_method());
1412 } else {
1413 Bytecodes::Code bc;
1414 CallInfo callinfo;
1415 find_callee_info_helper(vfst, bc, callinfo, CHECK_(methodHandle()));
1416 // Calls via mismatching methods are always non-scalarized
1417 if (callinfo.resolved_method()->mismatch()) {
1418 caller_does_not_scalarize = true;
1419 }
1420 callee_method = methodHandle(current, callinfo.selected_method());
1421 }
1422 assert(callee_method()->is_method(), "must be");
1423 return callee_method;
1424 }
1425
1426 // Resolves a call.
1427 methodHandle SharedRuntime::resolve_helper(bool is_virtual, bool is_optimized, bool& caller_does_not_scalarize, TRAPS) {
1428 JavaThread* current = THREAD;
1429 ResourceMark rm(current);
1430 RegisterMap cbl_map(current,
1431 RegisterMap::UpdateMap::skip,
1432 RegisterMap::ProcessFrames::include,
1433 RegisterMap::WalkContinuation::skip);
1434 frame caller_frame = current->last_frame().sender(&cbl_map);
1435
1436 CodeBlob* caller_cb = caller_frame.cb();
1437 guarantee(caller_cb != nullptr && caller_cb->is_nmethod(), "must be called from compiled method");
1438 nmethod* caller_nm = caller_cb->as_nmethod();
1439
1440 // determine call info & receiver
1441 // note: a) receiver is null for static calls
1442 // b) an exception is thrown if receiver is null for non-static calls
1443 CallInfo call_info;
1444 Bytecodes::Code invoke_code = Bytecodes::_illegal;
1445 Handle receiver = find_callee_info(invoke_code, call_info, CHECK_(methodHandle()));
1446
1447 NoSafepointVerifier nsv;
1448
1449 methodHandle callee_method(current, call_info.selected_method());
1450 // Calls via mismatching methods are always non-scalarized
1451 bool mismatch = is_optimized ? call_info.selected_method()->mismatch() : call_info.resolved_method()->mismatch();
1452 if (caller_nm->is_compiled_by_c1() || mismatch) {
1453 caller_does_not_scalarize = true;
1454 }
1455
1456 assert((!is_virtual && invoke_code == Bytecodes::_invokestatic ) ||
1457 (!is_virtual && invoke_code == Bytecodes::_invokespecial) ||
1458 (!is_virtual && invoke_code == Bytecodes::_invokehandle ) ||
1459 (!is_virtual && invoke_code == Bytecodes::_invokedynamic) ||
1460 ( is_virtual && invoke_code != Bytecodes::_invokestatic ), "inconsistent bytecode");
1461
1462 assert(!caller_nm->is_unloading(), "It should not be unloading");
1463
1464 #ifndef PRODUCT
1465 // tracing/debugging/statistics
1466 uint *addr = (is_optimized) ? (&_resolve_opt_virtual_ctr) :
1467 (is_virtual) ? (&_resolve_virtual_ctr) :
1468 (&_resolve_static_ctr);
1469 AtomicAccess::inc(addr);
1470
1471 if (TraceCallFixup) {
1472 ResourceMark rm(current);
1473 tty->print("resolving %s%s (%s) %s call to",
1474 (is_optimized) ? "optimized " : "", (is_virtual) ? "virtual" : "static",
1475 Bytecodes::name(invoke_code), (caller_does_not_scalarize) ? "non-scalar" : "");
1476 callee_method->print_short_name(tty);
1477 tty->print_cr(" at pc: " INTPTR_FORMAT " to code: " INTPTR_FORMAT,
1478 p2i(caller_frame.pc()), p2i(callee_method->code()));
1479 }
1480 #endif
1481
1482 if (invoke_code == Bytecodes::_invokestatic) {
1483 assert(callee_method->method_holder()->is_initialized() ||
1484 callee_method->method_holder()->is_reentrant_initialization(current),
1485 "invalid class initialization state for invoke_static");
1486 if (!VM_Version::supports_fast_class_init_checks() && callee_method->needs_clinit_barrier()) {
1487 // In order to keep class initialization check, do not patch call
1488 // site for static call when the class is not fully initialized.
1489 // Proper check is enforced by call site re-resolution on every invocation.
1490 //
1491 // When fast class initialization checks are supported (VM_Version::supports_fast_class_init_checks() == true),
1492 // explicit class initialization check is put in nmethod entry (VEP).
1493 assert(callee_method->method_holder()->is_linked(), "must be");
1494 return callee_method;
1495 }
1496 }
1497
1498
1499 // JSR 292 key invariant:
1500 // If the resolved method is a MethodHandle invoke target, the call
1501 // site must be a MethodHandle call site, because the lambda form might tail-call
1502 // leaving the stack in a state unknown to either caller or callee
1503
1504 // Compute entry points. The computation of the entry points is independent of
1505 // patching the call.
1506
1507 // Make sure the callee nmethod does not get deoptimized and removed before
1508 // we are done patching the code.
1509
1510
1511 CompiledICLocker ml(caller_nm);
1512 if (is_virtual && !is_optimized) {
1513 CompiledIC* inline_cache = CompiledIC_before(caller_nm, caller_frame.pc());
1514 inline_cache->update(&call_info, receiver->klass(), caller_does_not_scalarize);
1515 } else {
1516 // Callsite is a direct call - set it to the destination method
1517 CompiledDirectCall* callsite = CompiledDirectCall::before(caller_frame.pc());
1518 callsite->set(callee_method, caller_does_not_scalarize);
1519 }
1520
1521 return callee_method;
1522 }
1523
1524 // Inline caches exist only in compiled code
1525 JRT_BLOCK_ENTRY(address, SharedRuntime::handle_wrong_method_ic_miss(JavaThread* current))
1526 #ifdef ASSERT
1527 RegisterMap reg_map(current,
1528 RegisterMap::UpdateMap::skip,
1529 RegisterMap::ProcessFrames::include,
1530 RegisterMap::WalkContinuation::skip);
1531 frame stub_frame = current->last_frame();
1532 assert(stub_frame.is_runtime_frame(), "sanity check");
1533 frame caller_frame = stub_frame.sender(®_map);
1534 assert(!caller_frame.is_interpreted_frame() && !caller_frame.is_entry_frame() && !caller_frame.is_upcall_stub_frame(), "unexpected frame");
1535 #endif /* ASSERT */
1536
1537 methodHandle callee_method;
1538 bool caller_does_not_scalarize = false;
1539 JRT_BLOCK
1540 callee_method = SharedRuntime::handle_ic_miss_helper(caller_does_not_scalarize, CHECK_NULL);
1541 // Return Method* through TLS
1542 current->set_vm_result_metadata(callee_method());
1543 JRT_BLOCK_END
1544 // return compiled code entry point after potential safepoints
1545 return get_resolved_entry(current, callee_method, false, false, caller_does_not_scalarize);
1546 JRT_END
1547
1548
1549 // Handle call site that has been made non-entrant
1550 JRT_BLOCK_ENTRY(address, SharedRuntime::handle_wrong_method(JavaThread* current))
1551 // 6243940 We might end up in here if the callee is deoptimized
1552 // as we race to call it. We don't want to take a safepoint if
1553 // the caller was interpreted because the caller frame will look
1554 // interpreted to the stack walkers and arguments are now
1555 // "compiled" so it is much better to make this transition
1556 // invisible to the stack walking code. The i2c path will
1557 // place the callee method in the callee_target. It is stashed
1558 // there because if we try and find the callee by normal means a
1559 // safepoint is possible and have trouble gc'ing the compiled args.
1560 RegisterMap reg_map(current,
1561 RegisterMap::UpdateMap::skip,
1562 RegisterMap::ProcessFrames::include,
1563 RegisterMap::WalkContinuation::skip);
1564 frame stub_frame = current->last_frame();
1565 assert(stub_frame.is_runtime_frame(), "sanity check");
1566 frame caller_frame = stub_frame.sender(®_map);
1567
1568 if (caller_frame.is_interpreted_frame() ||
1569 caller_frame.is_entry_frame() ||
1570 caller_frame.is_upcall_stub_frame()) {
1571 Method* callee = current->callee_target();
1572 guarantee(callee != nullptr && callee->is_method(), "bad handshake");
1573 current->set_vm_result_metadata(callee);
1574 current->set_callee_target(nullptr);
1575 if (caller_frame.is_entry_frame() && VM_Version::supports_fast_class_init_checks()) {
1576 // Bypass class initialization checks in c2i when caller is in native.
1577 // JNI calls to static methods don't have class initialization checks.
1578 // Fast class initialization checks are present in c2i adapters and call into
1579 // SharedRuntime::handle_wrong_method() on the slow path.
1580 //
1581 // JVM upcalls may land here as well, but there's a proper check present in
1582 // LinkResolver::resolve_static_call (called from JavaCalls::call_static),
1583 // so bypassing it in c2i adapter is benign.
1584 return callee->get_c2i_no_clinit_check_entry();
1585 } else {
1586 if (caller_frame.is_interpreted_frame()) {
1587 return callee->get_c2i_inline_entry();
1588 } else {
1589 return callee->get_c2i_entry();
1590 }
1591 }
1592 }
1593
1594 // Must be compiled to compiled path which is safe to stackwalk
1595 methodHandle callee_method;
1596 bool is_static_call = false;
1597 bool is_optimized = false;
1598 bool caller_does_not_scalarize = false;
1599 JRT_BLOCK
1600 // Force resolving of caller (if we called from compiled frame)
1601 callee_method = SharedRuntime::reresolve_call_site(is_optimized, caller_does_not_scalarize, CHECK_NULL);
1602 current->set_vm_result_metadata(callee_method());
1603 JRT_BLOCK_END
1604 // return compiled code entry point after potential safepoints
1605 return get_resolved_entry(current, callee_method, callee_method->is_static(), is_optimized, caller_does_not_scalarize);
1606 JRT_END
1607
1608 // Handle abstract method call
1609 JRT_BLOCK_ENTRY(address, SharedRuntime::handle_wrong_method_abstract(JavaThread* current))
1610 // Verbose error message for AbstractMethodError.
1611 // Get the called method from the invoke bytecode.
1612 vframeStream vfst(current, true);
1613 assert(!vfst.at_end(), "Java frame must exist");
1614 methodHandle caller(current, vfst.method());
1615 Bytecode_invoke invoke(caller, vfst.bci());
1616 DEBUG_ONLY( invoke.verify(); )
1617
1618 // Find the compiled caller frame.
1619 RegisterMap reg_map(current,
1620 RegisterMap::UpdateMap::include,
1621 RegisterMap::ProcessFrames::include,
1622 RegisterMap::WalkContinuation::skip);
1623 frame stubFrame = current->last_frame();
1624 assert(stubFrame.is_runtime_frame(), "must be");
1625 frame callerFrame = stubFrame.sender(®_map);
1626 assert(callerFrame.is_compiled_frame(), "must be");
1627
1628 // Install exception and return forward entry.
1629 address res = SharedRuntime::throw_AbstractMethodError_entry();
1630 JRT_BLOCK
1631 methodHandle callee(current, invoke.static_target(current));
1632 if (!callee.is_null()) {
1633 oop recv = callerFrame.retrieve_receiver(®_map);
1634 Klass *recv_klass = (recv != nullptr) ? recv->klass() : nullptr;
1635 res = StubRoutines::forward_exception_entry();
1636 LinkResolver::throw_abstract_method_error(callee, recv_klass, CHECK_(res));
1637 }
1638 JRT_BLOCK_END
1639 return res;
1640 JRT_END
1641
1642 // return verified_code_entry if interp_only_mode is not set for the current thread;
1643 // otherwise return c2i entry.
1644 address SharedRuntime::get_resolved_entry(JavaThread* current, methodHandle callee_method,
1645 bool is_static_call, bool is_optimized, bool caller_does_not_scalarize) {
1646 bool is_interp_only_mode = (StressCallingConvention && (os::random() % (1 << 10)) == 0) || current->is_interp_only_mode();
1647 // In interp_only_mode we need to go to the interpreted entry
1648 // The c2i won't patch in this mode -- see fixup_callers_callsite
1649 bool go_to_interpreter = is_interp_only_mode && !callee_method->is_special_native_intrinsic();
1650
1651 if (caller_does_not_scalarize) {
1652 if (go_to_interpreter) {
1653 return callee_method->get_c2i_inline_entry();
1654 }
1655 assert(callee_method->verified_inline_code_entry() != nullptr, "Jump to zero!");
1656 return callee_method->verified_inline_code_entry();
1657 } else if (is_static_call || is_optimized) {
1658 if (go_to_interpreter) {
1659 return callee_method->get_c2i_entry();
1660 }
1661 assert(callee_method->verified_code_entry() != nullptr, "Jump to zero!");
1662 return callee_method->verified_code_entry();
1663 } else {
1664 if (go_to_interpreter) {
1665 return callee_method->get_c2i_inline_ro_entry();
1666 }
1667 assert(callee_method->verified_inline_ro_code_entry() != nullptr, "Jump to zero!");
1668 return callee_method->verified_inline_ro_code_entry();
1669 }
1670 }
1671
1672 // resolve a static call and patch code
1673 JRT_BLOCK_ENTRY(address, SharedRuntime::resolve_static_call_C(JavaThread* current ))
1674 methodHandle callee_method;
1675 bool caller_does_not_scalarize = false;
1676 bool enter_special = false;
1677 JRT_BLOCK
1678 callee_method = SharedRuntime::resolve_helper(false, false, caller_does_not_scalarize, CHECK_NULL);
1679 current->set_vm_result_metadata(callee_method());
1680 JRT_BLOCK_END
1681 // return compiled code entry point after potential safepoints
1682 return get_resolved_entry(current, callee_method, true, false, caller_does_not_scalarize);
1683 JRT_END
1684
1685 // resolve virtual call and update inline cache to monomorphic
1686 JRT_BLOCK_ENTRY(address, SharedRuntime::resolve_virtual_call_C(JavaThread* current))
1687 methodHandle callee_method;
1688 bool caller_does_not_scalarize = false;
1689 JRT_BLOCK
1690 callee_method = SharedRuntime::resolve_helper(true, false, caller_does_not_scalarize, CHECK_NULL);
1691 current->set_vm_result_metadata(callee_method());
1692 JRT_BLOCK_END
1693 // return compiled code entry point after potential safepoints
1694 return get_resolved_entry(current, callee_method, false, false, caller_does_not_scalarize);
1695 JRT_END
1696
1697
1698 // Resolve a virtual call that can be statically bound (e.g., always
1699 // monomorphic, so it has no inline cache). Patch code to resolved target.
1700 JRT_BLOCK_ENTRY(address, SharedRuntime::resolve_opt_virtual_call_C(JavaThread* current))
1701 methodHandle callee_method;
1702 bool caller_does_not_scalarize = false;
1703 JRT_BLOCK
1704 callee_method = SharedRuntime::resolve_helper(true, true, caller_does_not_scalarize, CHECK_NULL);
1705 current->set_vm_result_metadata(callee_method());
1706 JRT_BLOCK_END
1707 // return compiled code entry point after potential safepoints
1708 return get_resolved_entry(current, callee_method, false, true, caller_does_not_scalarize);
1709 JRT_END
1710
1711 methodHandle SharedRuntime::handle_ic_miss_helper(bool& caller_does_not_scalarize, TRAPS) {
1712 JavaThread* current = THREAD;
1713 ResourceMark rm(current);
1714 CallInfo call_info;
1715 Bytecodes::Code bc;
1716
1717 // receiver is null for static calls. An exception is thrown for null
1718 // receivers for non-static calls
1719 Handle receiver = find_callee_info(bc, call_info, CHECK_(methodHandle()));
1720
1721 methodHandle callee_method(current, call_info.selected_method());
1722
1723 #ifndef PRODUCT
1724 AtomicAccess::inc(&_ic_miss_ctr);
1725
1726 // Statistics & Tracing
1727 if (TraceCallFixup) {
1728 ResourceMark rm(current);
1729 tty->print("IC miss (%s) %s call to", Bytecodes::name(bc), (caller_does_not_scalarize) ? "non-scalar" : "");
1730 callee_method->print_short_name(tty);
1731 tty->print_cr(" code: " INTPTR_FORMAT, p2i(callee_method->code()));
1732 }
1733
1734 if (ICMissHistogram) {
1735 MutexLocker m(VMStatistic_lock);
1736 RegisterMap reg_map(current,
1737 RegisterMap::UpdateMap::skip,
1738 RegisterMap::ProcessFrames::include,
1739 RegisterMap::WalkContinuation::skip);
1740 frame f = current->last_frame().real_sender(®_map);// skip runtime stub
1741 // produce statistics under the lock
1742 trace_ic_miss(f.pc());
1743 }
1744 #endif
1745
1746 // install an event collector so that when a vtable stub is created the
1747 // profiler can be notified via a DYNAMIC_CODE_GENERATED event. The
1748 // event can't be posted when the stub is created as locks are held
1749 // - instead the event will be deferred until the event collector goes
1750 // out of scope.
1751 JvmtiDynamicCodeEventCollector event_collector;
1752
1753 // Update inline cache to megamorphic. Skip update if we are called from interpreted.
1754 RegisterMap reg_map(current,
1755 RegisterMap::UpdateMap::skip,
1756 RegisterMap::ProcessFrames::include,
1757 RegisterMap::WalkContinuation::skip);
1758 frame caller_frame = current->last_frame().sender(®_map);
1759 CodeBlob* cb = caller_frame.cb();
1760 nmethod* caller_nm = cb->as_nmethod();
1761 // Calls via mismatching methods are always non-scalarized
1762 if (caller_nm->is_compiled_by_c1() || call_info.resolved_method()->mismatch()) {
1763 caller_does_not_scalarize = true;
1764 }
1765
1766 CompiledICLocker ml(caller_nm);
1767 CompiledIC* inline_cache = CompiledIC_before(caller_nm, caller_frame.pc());
1768 inline_cache->update(&call_info, receiver()->klass(), caller_does_not_scalarize);
1769
1770 return callee_method;
1771 }
1772
1773 //
1774 // Resets a call-site in compiled code so it will get resolved again.
1775 // This routines handles both virtual call sites, optimized virtual call
1776 // sites, and static call sites. Typically used to change a call sites
1777 // destination from compiled to interpreted.
1778 //
1779 methodHandle SharedRuntime::reresolve_call_site(bool& is_optimized, bool& caller_does_not_scalarize, TRAPS) {
1780 JavaThread* current = THREAD;
1781 ResourceMark rm(current);
1782 RegisterMap reg_map(current,
1783 RegisterMap::UpdateMap::skip,
1784 RegisterMap::ProcessFrames::include,
1785 RegisterMap::WalkContinuation::skip);
1786 frame stub_frame = current->last_frame();
1787 assert(stub_frame.is_runtime_frame(), "must be a runtimeStub");
1788 frame caller = stub_frame.sender(®_map);
1789 if (caller.is_compiled_frame()) {
1790 caller_does_not_scalarize = caller.cb()->as_nmethod()->is_compiled_by_c1();
1791 }
1792 assert(!caller.is_interpreted_frame(), "must be compiled");
1793
1794 // If the frame isn't a live compiled frame (i.e. deoptimized by the time we get here), no IC clearing must be done
1795 // for the caller. However, when the caller is C2 compiled and the callee a C1 or C2 compiled method, then we still
1796 // need to figure out whether it was an optimized virtual call with an inline type receiver. Otherwise, we end up
1797 // using the wrong method entry point and accidentally skip the buffering of the receiver.
1798 methodHandle callee_method = find_callee_method(caller_does_not_scalarize, CHECK_(methodHandle()));
1799 const bool caller_is_compiled_and_not_deoptimized = caller.is_compiled_frame() && !caller.is_deoptimized_frame();
1800 const bool caller_is_continuation_enter_intrinsic =
1801 caller.is_native_frame() && caller.cb()->as_nmethod()->method()->is_continuation_enter_intrinsic();
1802 const bool do_IC_clearing = caller_is_compiled_and_not_deoptimized || caller_is_continuation_enter_intrinsic;
1803
1804 const bool callee_compiled_with_scalarized_receiver = callee_method->has_compiled_code() &&
1805 !callee_method()->is_static() &&
1806 callee_method()->is_scalarized_arg(0);
1807 const bool compute_is_optimized = !caller_does_not_scalarize && callee_compiled_with_scalarized_receiver;
1808
1809 if (do_IC_clearing || compute_is_optimized) {
1810 address pc = caller.pc();
1811
1812 nmethod* caller_nm = CodeCache::find_nmethod(pc);
1813 assert(caller_nm != nullptr, "did not find caller nmethod");
1814
1815 // Default call_addr is the location of the "basic" call.
1816 // Determine the address of the call we a reresolving. With
1817 // Inline Caches we will always find a recognizable call.
1818 // With Inline Caches disabled we may or may not find a
1819 // recognizable call. We will always find a call for static
1820 // calls and for optimized virtual calls. For vanilla virtual
1821 // calls it depends on the state of the UseInlineCaches switch.
1822 //
1823 // With Inline Caches disabled we can get here for a virtual call
1824 // for two reasons:
1825 // 1 - calling an abstract method. The vtable for abstract methods
1826 // will run us thru handle_wrong_method and we will eventually
1827 // end up in the interpreter to throw the ame.
1828 // 2 - a racing deoptimization. We could be doing a vanilla vtable
1829 // call and between the time we fetch the entry address and
1830 // we jump to it the target gets deoptimized. Similar to 1
1831 // we will wind up in the interprter (thru a c2i with c2).
1832 //
1833 CompiledICLocker ml(caller_nm);
1834 address call_addr = caller_nm->call_instruction_address(pc);
1835
1836 if (call_addr != nullptr) {
1837 // On x86 the logic for finding a call instruction is blindly checking for a call opcode 5
1838 // bytes back in the instruction stream so we must also check for reloc info.
1839 RelocIterator iter(caller_nm, call_addr, call_addr+1);
1840 bool ret = iter.next(); // Get item
1841 if (ret) {
1842 is_optimized = false;
1843 switch (iter.type()) {
1844 case relocInfo::static_call_type:
1845 assert(callee_method->is_static(), "must be");
1846 case relocInfo::opt_virtual_call_type: {
1847 is_optimized = (iter.type() == relocInfo::opt_virtual_call_type);
1848 if (do_IC_clearing) {
1849 CompiledDirectCall* cdc = CompiledDirectCall::at(call_addr);
1850 cdc->set_to_clean();
1851 }
1852 break;
1853 }
1854
1855 case relocInfo::virtual_call_type: {
1856 if (do_IC_clearing) {
1857 // compiled, dispatched call (which used to call an interpreted method)
1858 CompiledIC* inline_cache = CompiledIC_at(caller_nm, call_addr);
1859 inline_cache->set_to_clean();
1860 }
1861 break;
1862 }
1863 default:
1864 break;
1865 }
1866 }
1867 }
1868 }
1869
1870 #ifndef PRODUCT
1871 AtomicAccess::inc(&_wrong_method_ctr);
1872
1873 if (TraceCallFixup) {
1874 ResourceMark rm(current);
1875 tty->print("handle_wrong_method reresolving %s call to", (caller_does_not_scalarize) ? "non-scalar" : "");
1876 callee_method->print_short_name(tty);
1877 tty->print_cr(" code: " INTPTR_FORMAT, p2i(callee_method->code()));
1878 }
1879 #endif
1880
1881 return callee_method;
1882 }
1883
1884 address SharedRuntime::handle_unsafe_access(JavaThread* thread, address next_pc) {
1885 // The faulting unsafe accesses should be changed to throw the error
1886 // synchronously instead. Meanwhile the faulting instruction will be
1887 // skipped over (effectively turning it into a no-op) and an
1888 // asynchronous exception will be raised which the thread will
1889 // handle at a later point. If the instruction is a load it will
1890 // return garbage.
1891
1892 // Request an async exception.
1893 thread->set_pending_unsafe_access_error();
1894
1895 // Return address of next instruction to execute.
2061 msglen += strlen(caster_klass_description) + strlen(target_klass_description) + strlen(klass_separator) + 3;
2062
2063 char* message = NEW_RESOURCE_ARRAY_RETURN_NULL(char, msglen);
2064 if (message == nullptr) {
2065 // Shouldn't happen, but don't cause even more problems if it does
2066 message = const_cast<char*>(caster_klass->external_name());
2067 } else {
2068 jio_snprintf(message,
2069 msglen,
2070 "class %s cannot be cast to class %s (%s%s%s)",
2071 caster_name,
2072 target_name,
2073 caster_klass_description,
2074 klass_separator,
2075 target_klass_description
2076 );
2077 }
2078 return message;
2079 }
2080
2081 char* SharedRuntime::generate_identity_exception_message(JavaThread* current, Klass* klass) {
2082 assert(klass->is_inline_klass(), "Must be a concrete value class");
2083 const char* desc = "Cannot synchronize on an instance of value class ";
2084 const char* className = klass->external_name();
2085 size_t msglen = strlen(desc) + strlen(className) + 1;
2086 char* message = NEW_RESOURCE_ARRAY(char, msglen);
2087 if (nullptr == message) {
2088 // Out of memory: can't create detailed error message
2089 message = const_cast<char*>(klass->external_name());
2090 } else {
2091 jio_snprintf(message, msglen, "%s%s", desc, className);
2092 }
2093 return message;
2094 }
2095
2096 JRT_LEAF(void, SharedRuntime::reguard_yellow_pages())
2097 (void) JavaThread::current()->stack_overflow_state()->reguard_stack();
2098 JRT_END
2099
2100 void SharedRuntime::monitor_enter_helper(oopDesc* obj, BasicLock* lock, JavaThread* current) {
2101 if (!SafepointSynchronize::is_synchronizing()) {
2102 // Only try quick_enter() if we're not trying to reach a safepoint
2103 // so that the calling thread reaches the safepoint more quickly.
2104 if (ObjectSynchronizer::quick_enter(obj, lock, current)) {
2105 return;
2106 }
2107 }
2108 // NO_ASYNC required because an async exception on the state transition destructor
2109 // would leave you with the lock held and it would never be released.
2110 // The normal monitorenter NullPointerException is thrown without acquiring a lock
2111 // and the model is that an exception implies the method failed.
2112 JRT_BLOCK_NO_ASYNC
2113 Handle h_obj(THREAD, obj);
2114 ObjectSynchronizer::enter(h_obj, lock, current);
2115 assert(!HAS_PENDING_EXCEPTION, "Should have no exception here");
2309 tty->print_cr("Note 1: counter updates are not MT-safe.");
2310 tty->print_cr("Note 2: %% in major categories are relative to total non-inlined calls;");
2311 tty->print_cr(" %% in nested categories are relative to their category");
2312 tty->print_cr(" (and thus add up to more than 100%% with inlining)");
2313 tty->cr();
2314
2315 MethodArityHistogram h;
2316 }
2317 #endif
2318
2319 #ifndef PRODUCT
2320 static int _lookups; // number of calls to lookup
2321 static int _equals; // number of buckets checked with matching hash
2322 static int _archived_hits; // number of successful lookups in archived table
2323 static int _runtime_hits; // number of successful lookups in runtime table
2324 #endif
2325
2326 // A simple wrapper class around the calling convention information
2327 // that allows sharing of adapters for the same calling convention.
2328 class AdapterFingerPrint : public MetaspaceObj {
2329 public:
2330 class Element {
2331 private:
2332 // The highest byte is the type of the argument. The remaining bytes contain the offset of the
2333 // field if it is flattened in the calling convention, -1 otherwise.
2334 juint _payload;
2335
2336 static constexpr int offset_bit_width = 24;
2337 static constexpr juint offset_bit_mask = (1 << offset_bit_width) - 1;
2338 public:
2339 Element(BasicType bt, int offset) : _payload((static_cast<juint>(bt) << offset_bit_width) | (juint(offset) & offset_bit_mask)) {
2340 assert(offset >= -1 && offset < jint(offset_bit_mask), "invalid offset %d", offset);
2341 }
2342
2343 BasicType bt() const {
2344 return static_cast<BasicType>(_payload >> offset_bit_width);
2345 }
2346
2347 int offset() const {
2348 juint res = _payload & offset_bit_mask;
2349 return res == offset_bit_mask ? -1 : res;
2350 }
2351
2352 juint hash() const {
2353 return _payload;
2354 }
2355
2356 bool operator!=(const Element& other) const {
2357 return _payload != other._payload;
2358 }
2359 };
2360
2361 private:
2362 const bool _has_ro_adapter;
2363 const int _length;
2364
2365 static int data_offset() { return sizeof(AdapterFingerPrint); }
2366 Element* data_pointer() {
2367 return reinterpret_cast<Element*>(reinterpret_cast<address>(this) + data_offset());
2368 }
2369
2370 const Element& element_at(int index) {
2371 assert(index < length(), "index %d out of bounds for length %d", index, length());
2372 Element* data = data_pointer();
2373 return data[index];
2374 }
2375
2376 // Private construtor. Use allocate() to get an instance.
2377 AdapterFingerPrint(const GrowableArray<SigEntry>* sig, bool has_ro_adapter)
2378 : _has_ro_adapter(has_ro_adapter), _length(total_args_passed_in_sig(sig)) {
2379 Element* data = data_pointer();
2380 BasicType prev_bt = T_ILLEGAL;
2381 int vt_count = 0;
2382 for (int index = 0; index < _length; index++) {
2383 const SigEntry& sig_entry = sig->at(index);
2384 BasicType bt = sig_entry._bt;
2385 if (bt == T_METADATA) {
2386 // Found start of inline type in signature
2387 assert(InlineTypePassFieldsAsArgs, "unexpected start of inline type");
2388 vt_count++;
2389 } else if (bt == T_VOID && prev_bt != T_LONG && prev_bt != T_DOUBLE) {
2390 // Found end of inline type in signature
2391 assert(InlineTypePassFieldsAsArgs, "unexpected end of inline type");
2392 vt_count--;
2393 assert(vt_count >= 0, "invalid vt_count");
2394 } else if (vt_count == 0) {
2395 // Widen fields that are not part of a scalarized inline type argument
2396 assert(sig_entry._offset == -1, "invalid offset for argument that is not a flattened field %d", sig_entry._offset);
2397 bt = adapter_encoding(bt);
2398 }
2399
2400 ::new(&data[index]) Element(bt, sig_entry._offset);
2401 prev_bt = bt;
2402 }
2403 assert(vt_count == 0, "invalid vt_count");
2404 }
2405
2406 // Call deallocate instead
2407 ~AdapterFingerPrint() {
2408 ShouldNotCallThis();
2409 }
2410
2411 static int total_args_passed_in_sig(const GrowableArray<SigEntry>* sig) {
2412 return (sig != nullptr) ? sig->length() : 0;
2413 }
2414
2415 static int compute_size_in_words(int len) {
2416 return (int)heap_word_size(sizeof(AdapterFingerPrint) + (len * sizeof(Element)));
2417 }
2418
2419 // Remap BasicTypes that are handled equivalently by the adapters.
2420 // These are correct for the current system but someday it might be
2421 // necessary to make this mapping platform dependent.
2422 static BasicType adapter_encoding(BasicType in) {
2423 switch (in) {
2424 case T_BOOLEAN:
2425 case T_BYTE:
2426 case T_SHORT:
2427 case T_CHAR:
2428 // They are all promoted to T_INT in the calling convention
2429 return T_INT;
2430
2431 case T_OBJECT:
2432 case T_ARRAY:
2433 // In other words, we assume that any register good enough for
2434 // an int or long is good enough for a managed pointer.
2435 #ifdef _LP64
2436 return T_LONG;
2437 #else
2438 return T_INT;
2439 #endif
2440
2441 case T_INT:
2442 case T_LONG:
2443 case T_FLOAT:
2444 case T_DOUBLE:
2445 case T_VOID:
2446 return in;
2447
2448 default:
2449 ShouldNotReachHere();
2450 return T_CONFLICT;
2451 }
2452 }
2453
2454 void* operator new(size_t size, size_t fp_size) throw() {
2455 assert(fp_size >= size, "sanity check");
2456 void* p = AllocateHeap(fp_size, mtCode);
2457 memset(p, 0, fp_size);
2458 return p;
2459 }
2460
2461 public:
2462 template<typename Function>
2463 void iterate_args(Function function) {
2464 for (int i = 0; i < length(); i++) {
2465 function(element_at(i));
2466 }
2467 }
2468
2469 static AdapterFingerPrint* allocate(const GrowableArray<SigEntry>* sig, bool has_ro_adapter = false) {
2470 int len = total_args_passed_in_sig(sig);
2471 int size_in_bytes = BytesPerWord * compute_size_in_words(len);
2472 AdapterFingerPrint* afp = new (size_in_bytes) AdapterFingerPrint(sig, has_ro_adapter);
2473 assert((afp->size() * BytesPerWord) == size_in_bytes, "should match");
2474 return afp;
2475 }
2476
2477 static void deallocate(AdapterFingerPrint* fp) {
2478 FreeHeap(fp);
2479 }
2480
2481 bool has_ro_adapter() const {
2482 return _has_ro_adapter;
2483 }
2484
2485 int length() const {
2486 return _length;
2487 }
2488
2489 unsigned int compute_hash() {
2490 int hash = 0;
2491 for (int i = 0; i < length(); i++) {
2492 const Element& v = element_at(i);
2493 //Add arithmetic operation to the hash, like +3 to improve hashing
2494 hash = ((hash << 8) ^ v.hash() ^ (hash >> 5)) + 3;
2495 }
2496 return (unsigned int)hash;
2497 }
2498
2499 const char* as_string() {
2500 stringStream st;
2501 st.print("{");
2502 if (_has_ro_adapter) {
2503 st.print("has_ro_adapter");
2504 } else {
2505 st.print("no_ro_adapter");
2506 }
2507 for (int i = 0; i < length(); i++) {
2508 st.print(", ");
2509 const Element& elem = element_at(i);
2510 st.print("{%s, %d}", type2name(elem.bt()), elem.offset());
2511 }
2512 st.print("}");
2513 return st.as_string();
2514 }
2515
2516 const char* as_basic_args_string() {
2517 stringStream st;
2518 bool long_prev = false;
2519 iterate_args([&] (const Element& arg) {
2520 if (long_prev) {
2521 long_prev = false;
2522 if (arg.bt() == T_VOID) {
2523 st.print("J");
2524 } else {
2525 st.print("L");
2526 }
2527 }
2528 if (arg.bt() == T_LONG) {
2529 long_prev = true;
2530 } else if (arg.bt() != T_VOID) {
2531 st.print("%c", type2char(arg.bt()));
2532 }
2533 });
2534 if (long_prev) {
2535 st.print("L");
2536 }
2537 return st.as_string();
2538 }
2539
2540 bool equals(AdapterFingerPrint* other) {
2541 if (other->_has_ro_adapter != _has_ro_adapter) {
2542 return false;
2543 } else if (other->_length != _length) {
2544 return false;
2545 } else {
2546 for (int i = 0; i < _length; i++) {
2547 if (element_at(i) != other->element_at(i)) {
2548 return false;
2549 }
2550 }
2551 }
2552 return true;
2553 }
2554
2555 // methods required by virtue of being a MetaspaceObj
2556 void metaspace_pointers_do(MetaspaceClosure* it) { return; /* nothing to do here */ }
2557 int size() const { return compute_size_in_words(_length); }
2558 MetaspaceObj::Type type() const { return AdapterFingerPrintType; }
2559
2560 static bool equals(AdapterFingerPrint* const& fp1, AdapterFingerPrint* const& fp2) {
2561 NOT_PRODUCT(_equals++);
2562 return fp1->equals(fp2);
2563 }
2564
2565 static unsigned int compute_hash(AdapterFingerPrint* const& fp) {
2566 return fp->compute_hash();
2567 }
2570 #if INCLUDE_CDS
2571 static inline bool adapter_fp_equals_compact_hashtable_entry(AdapterHandlerEntry* entry, AdapterFingerPrint* fp, int len_unused) {
2572 return AdapterFingerPrint::equals(entry->fingerprint(), fp);
2573 }
2574
2575 class ArchivedAdapterTable : public OffsetCompactHashtable<
2576 AdapterFingerPrint*,
2577 AdapterHandlerEntry*,
2578 adapter_fp_equals_compact_hashtable_entry> {};
2579 #endif // INCLUDE_CDS
2580
2581 // A hashtable mapping from AdapterFingerPrints to AdapterHandlerEntries
2582 using AdapterHandlerTable = HashTable<AdapterFingerPrint*, AdapterHandlerEntry*, 293,
2583 AnyObj::C_HEAP, mtCode,
2584 AdapterFingerPrint::compute_hash,
2585 AdapterFingerPrint::equals>;
2586 static AdapterHandlerTable* _adapter_handler_table;
2587 static GrowableArray<AdapterHandlerEntry*>* _adapter_handler_list = nullptr;
2588
2589 // Find a entry with the same fingerprint if it exists
2590 AdapterHandlerEntry* AdapterHandlerLibrary::lookup(const GrowableArray<SigEntry>* sig, bool has_ro_adapter) {
2591 NOT_PRODUCT(_lookups++);
2592 assert_lock_strong(AdapterHandlerLibrary_lock);
2593 AdapterFingerPrint* fp = AdapterFingerPrint::allocate(sig, has_ro_adapter);
2594 AdapterHandlerEntry* entry = nullptr;
2595 #if INCLUDE_CDS
2596 // if we are building the archive then the archived adapter table is
2597 // not valid and we need to use the ones added to the runtime table
2598 if (AOTCodeCache::is_using_adapter()) {
2599 // Search archived table first. It is read-only table so can be searched without lock
2600 entry = _aot_adapter_handler_table.lookup(fp, fp->compute_hash(), 0 /* unused */);
2601 #ifndef PRODUCT
2602 if (entry != nullptr) {
2603 _archived_hits++;
2604 }
2605 #endif
2606 }
2607 #endif // INCLUDE_CDS
2608 if (entry == nullptr) {
2609 assert_lock_strong(AdapterHandlerLibrary_lock);
2610 AdapterHandlerEntry** entry_p = _adapter_handler_table->get(fp);
2611 if (entry_p != nullptr) {
2612 entry = *entry_p;
2613 assert(entry->fingerprint()->equals(fp), "fingerprint mismatch key fp %s %s (hash=%d) != found fp %s %s (hash=%d)",
2630 TableStatistics ts = _adapter_handler_table->statistics_calculate(size);
2631 ts.print(tty, "AdapterHandlerTable");
2632 tty->print_cr("AdapterHandlerTable (table_size=%d, entries=%d)",
2633 _adapter_handler_table->table_size(), _adapter_handler_table->number_of_entries());
2634 int total_hits = _archived_hits + _runtime_hits;
2635 tty->print_cr("AdapterHandlerTable: lookups %d equals %d hits %d (archived=%d+runtime=%d)",
2636 _lookups, _equals, total_hits, _archived_hits, _runtime_hits);
2637 }
2638 #endif
2639
2640 // ---------------------------------------------------------------------------
2641 // Implementation of AdapterHandlerLibrary
2642 AdapterHandlerEntry* AdapterHandlerLibrary::_no_arg_handler = nullptr;
2643 AdapterHandlerEntry* AdapterHandlerLibrary::_int_arg_handler = nullptr;
2644 AdapterHandlerEntry* AdapterHandlerLibrary::_obj_arg_handler = nullptr;
2645 AdapterHandlerEntry* AdapterHandlerLibrary::_obj_int_arg_handler = nullptr;
2646 AdapterHandlerEntry* AdapterHandlerLibrary::_obj_obj_arg_handler = nullptr;
2647 #if INCLUDE_CDS
2648 ArchivedAdapterTable AdapterHandlerLibrary::_aot_adapter_handler_table;
2649 #endif // INCLUDE_CDS
2650 static const int AdapterHandlerLibrary_size = 48*K;
2651 BufferBlob* AdapterHandlerLibrary::_buffer = nullptr;
2652 volatile uint AdapterHandlerLibrary::_id_counter = 0;
2653
2654 BufferBlob* AdapterHandlerLibrary::buffer_blob() {
2655 assert(_buffer != nullptr, "should be initialized");
2656 return _buffer;
2657 }
2658
2659 static void post_adapter_creation(const AdapterHandlerEntry* entry) {
2660 if (Forte::is_enabled() || JvmtiExport::should_post_dynamic_code_generated()) {
2661 AdapterBlob* adapter_blob = entry->adapter_blob();
2662 char blob_id[256];
2663 jio_snprintf(blob_id,
2664 sizeof(blob_id),
2665 "%s(%s)",
2666 adapter_blob->name(),
2667 entry->fingerprint()->as_string());
2668 if (Forte::is_enabled()) {
2669 Forte::register_stub(blob_id, adapter_blob->content_begin(), adapter_blob->content_end());
2670 }
2678 void AdapterHandlerLibrary::initialize() {
2679 {
2680 ResourceMark rm;
2681 _adapter_handler_table = new (mtCode) AdapterHandlerTable();
2682 _buffer = BufferBlob::create("adapters", AdapterHandlerLibrary_size);
2683 }
2684
2685 #if INCLUDE_CDS
2686 // Link adapters in AOT Cache to their code in AOT Code Cache
2687 if (AOTCodeCache::is_using_adapter() && !_aot_adapter_handler_table.empty()) {
2688 link_aot_adapters();
2689 lookup_simple_adapters();
2690 return;
2691 }
2692 #endif // INCLUDE_CDS
2693
2694 ResourceMark rm;
2695 {
2696 MutexLocker mu(AdapterHandlerLibrary_lock);
2697
2698 CompiledEntrySignature no_args;
2699 no_args.compute_calling_conventions();
2700 _no_arg_handler = create_adapter(no_args, true);
2701
2702 CompiledEntrySignature obj_args;
2703 SigEntry::add_entry(obj_args.sig(), T_OBJECT);
2704 obj_args.compute_calling_conventions();
2705 _obj_arg_handler = create_adapter(obj_args, true);
2706
2707 CompiledEntrySignature int_args;
2708 SigEntry::add_entry(int_args.sig(), T_INT);
2709 int_args.compute_calling_conventions();
2710 _int_arg_handler = create_adapter(int_args, true);
2711
2712 CompiledEntrySignature obj_int_args;
2713 SigEntry::add_entry(obj_int_args.sig(), T_OBJECT);
2714 SigEntry::add_entry(obj_int_args.sig(), T_INT);
2715 obj_int_args.compute_calling_conventions();
2716 _obj_int_arg_handler = create_adapter(obj_int_args, true);
2717
2718 CompiledEntrySignature obj_obj_args;
2719 SigEntry::add_entry(obj_obj_args.sig(), T_OBJECT);
2720 SigEntry::add_entry(obj_obj_args.sig(), T_OBJECT);
2721 obj_obj_args.compute_calling_conventions();
2722 _obj_obj_arg_handler = create_adapter(obj_obj_args, true);
2723
2724 // we should always get an entry back but we don't have any
2725 // associated blob on Zero
2726 assert(_no_arg_handler != nullptr &&
2727 _obj_arg_handler != nullptr &&
2728 _int_arg_handler != nullptr &&
2729 _obj_int_arg_handler != nullptr &&
2730 _obj_obj_arg_handler != nullptr, "Initial adapter handlers must be properly created");
2731 }
2732
2733 // Outside of the lock
2734 #ifndef ZERO
2735 // no blobs to register when we are on Zero
2736 post_adapter_creation(_no_arg_handler);
2737 post_adapter_creation(_obj_arg_handler);
2738 post_adapter_creation(_int_arg_handler);
2739 post_adapter_creation(_obj_int_arg_handler);
2740 post_adapter_creation(_obj_obj_arg_handler);
2741 #endif // ZERO
2742 }
2743
2744 AdapterHandlerEntry* AdapterHandlerLibrary::new_entry(AdapterFingerPrint* fingerprint) {
2745 uint id = (uint)AtomicAccess::add((int*)&_id_counter, 1);
2746 assert(id > 0, "we can never overflow because AOT cache cannot contain more than 2^32 methods");
2747 return AdapterHandlerEntry::allocate(id, fingerprint);
2748 }
2749
2750 AdapterHandlerEntry* AdapterHandlerLibrary::get_simple_adapter(const methodHandle& method) {
2751 int total_args_passed = method->size_of_parameters(); // All args on stack
2752 if (total_args_passed == 0) {
2753 return _no_arg_handler;
2754 } else if (total_args_passed == 1) {
2755 if (!method->is_static()) {
2756 if (InlineTypePassFieldsAsArgs && method->method_holder()->is_inline_klass()) {
2757 return nullptr;
2758 }
2759 return _obj_arg_handler;
2760 }
2761 switch (method->signature()->char_at(1)) {
2762 case JVM_SIGNATURE_CLASS: {
2763 if (InlineTypePassFieldsAsArgs) {
2764 SignatureStream ss(method->signature());
2765 InlineKlass* vk = ss.as_inline_klass(method->method_holder());
2766 if (vk != nullptr) {
2767 return nullptr;
2768 }
2769 }
2770 return _obj_arg_handler;
2771 }
2772 case JVM_SIGNATURE_ARRAY:
2773 return _obj_arg_handler;
2774 case JVM_SIGNATURE_INT:
2775 case JVM_SIGNATURE_BOOLEAN:
2776 case JVM_SIGNATURE_CHAR:
2777 case JVM_SIGNATURE_BYTE:
2778 case JVM_SIGNATURE_SHORT:
2779 return _int_arg_handler;
2780 }
2781 } else if (total_args_passed == 2 &&
2782 !method->is_static() && (!InlineTypePassFieldsAsArgs || !method->method_holder()->is_inline_klass())) {
2783 switch (method->signature()->char_at(1)) {
2784 case JVM_SIGNATURE_CLASS: {
2785 if (InlineTypePassFieldsAsArgs) {
2786 SignatureStream ss(method->signature());
2787 InlineKlass* vk = ss.as_inline_klass(method->method_holder());
2788 if (vk != nullptr) {
2789 return nullptr;
2790 }
2791 }
2792 return _obj_obj_arg_handler;
2793 }
2794 case JVM_SIGNATURE_ARRAY:
2795 return _obj_obj_arg_handler;
2796 case JVM_SIGNATURE_INT:
2797 case JVM_SIGNATURE_BOOLEAN:
2798 case JVM_SIGNATURE_CHAR:
2799 case JVM_SIGNATURE_BYTE:
2800 case JVM_SIGNATURE_SHORT:
2801 return _obj_int_arg_handler;
2802 }
2803 }
2804 return nullptr;
2805 }
2806
2807 CompiledEntrySignature::CompiledEntrySignature(Method* method) :
2808 _method(method), _num_inline_args(0), _has_inline_recv(false),
2809 _regs(nullptr), _regs_cc(nullptr), _regs_cc_ro(nullptr),
2810 _args_on_stack(0), _args_on_stack_cc(0), _args_on_stack_cc_ro(0),
2811 _c1_needs_stack_repair(false), _c2_needs_stack_repair(false), _supers(nullptr) {
2812 _sig = new GrowableArray<SigEntry>((method != nullptr) ? method->size_of_parameters() : 1);
2813 _sig_cc = new GrowableArray<SigEntry>((method != nullptr) ? method->size_of_parameters() : 1);
2814 _sig_cc_ro = new GrowableArray<SigEntry>((method != nullptr) ? method->size_of_parameters() : 1);
2815 }
2816
2817 // See if we can save space by sharing the same entry for VIEP and VIEP(RO),
2818 // or the same entry for VEP and VIEP(RO).
2819 CodeOffsets::Entries CompiledEntrySignature::c1_inline_ro_entry_type() const {
2820 if (!has_scalarized_args()) {
2821 // VEP/VIEP/VIEP(RO) all share the same entry. There's no packing.
2822 return CodeOffsets::Verified_Entry;
2823 }
2824 if (_method->is_static()) {
2825 // Static methods don't need VIEP(RO)
2826 return CodeOffsets::Verified_Entry;
2827 }
2828
2829 if (has_inline_recv()) {
2830 if (num_inline_args() == 1) {
2831 // Share same entry for VIEP and VIEP(RO).
2832 // This is quite common: we have an instance method in an InlineKlass that has
2833 // no inline type args other than <this>.
2834 return CodeOffsets::Verified_Inline_Entry;
2835 } else {
2836 assert(num_inline_args() > 1, "must be");
2837 // No sharing:
2838 // VIEP(RO) -- <this> is passed as object
2839 // VEP -- <this> is passed as fields
2840 return CodeOffsets::Verified_Inline_Entry_RO;
2841 }
2842 }
2843
2844 // Either a static method, or <this> is not an inline type
2845 if (args_on_stack_cc() != args_on_stack_cc_ro()) {
2846 // No sharing:
2847 // Some arguments are passed on the stack, and we have inserted reserved entries
2848 // into the VEP, but we never insert reserved entries into the VIEP(RO).
2849 return CodeOffsets::Verified_Inline_Entry_RO;
2850 } else {
2851 // Share same entry for VEP and VIEP(RO).
2852 return CodeOffsets::Verified_Entry;
2853 }
2854 }
2855
2856 // Returns all super methods (transitive) in classes and interfaces that are overridden by the current method.
2857 GrowableArray<Method*>* CompiledEntrySignature::get_supers() {
2858 if (_supers != nullptr) {
2859 return _supers;
2860 }
2861 _supers = new GrowableArray<Method*>();
2862 // Skip private, static, and <init> methods
2863 if (_method->is_private() || _method->is_static() || _method->is_object_constructor()) {
2864 return _supers;
2865 }
2866 Symbol* name = _method->name();
2867 Symbol* signature = _method->signature();
2868 const Klass* holder = _method->method_holder()->super();
2869 Symbol* holder_name = holder->name();
2870 ThreadInVMfromUnknown tiv;
2871 JavaThread* current = JavaThread::current();
2872 HandleMark hm(current);
2873 Handle loader(current, _method->method_holder()->class_loader());
2874
2875 // Walk up the class hierarchy and search for super methods
2876 while (holder != nullptr) {
2877 Method* super_method = holder->lookup_method(name, signature);
2878 if (super_method == nullptr) {
2879 break;
2880 }
2881 if (!super_method->is_static() && !super_method->is_private() &&
2882 (!super_method->is_package_private() ||
2883 super_method->method_holder()->is_same_class_package(loader(), holder_name))) {
2884 _supers->push(super_method);
2885 }
2886 holder = super_method->method_holder()->super();
2887 }
2888 // Search interfaces for super methods
2889 Array<InstanceKlass*>* interfaces = _method->method_holder()->transitive_interfaces();
2890 for (int i = 0; i < interfaces->length(); ++i) {
2891 Method* m = interfaces->at(i)->lookup_method(name, signature);
2892 if (m != nullptr && !m->is_static() && m->is_public()) {
2893 _supers->push(m);
2894 }
2895 }
2896 return _supers;
2897 }
2898
2899 // Iterate over arguments and compute scalarized and non-scalarized signatures
2900 void CompiledEntrySignature::compute_calling_conventions(bool init) {
2901 bool has_scalarized = false;
2902 if (_method != nullptr) {
2903 InstanceKlass* holder = _method->method_holder();
2904 int arg_num = 0;
2905 if (!_method->is_static()) {
2906 // We shouldn't scalarize 'this' in a value class constructor
2907 if (holder->is_inline_klass() && InlineKlass::cast(holder)->can_be_passed_as_fields() &&
2908 !_method->is_object_constructor() && (init || _method->is_scalarized_arg(arg_num))) {
2909 _sig_cc->appendAll(InlineKlass::cast(holder)->extended_sig());
2910 _sig_cc->insert_before(1, SigEntry(T_OBJECT, 0, nullptr, false, true)); // buffer argument
2911 has_scalarized = true;
2912 _has_inline_recv = true;
2913 _num_inline_args++;
2914 } else {
2915 SigEntry::add_entry(_sig_cc, T_OBJECT, holder->name());
2916 }
2917 SigEntry::add_entry(_sig, T_OBJECT, holder->name());
2918 SigEntry::add_entry(_sig_cc_ro, T_OBJECT, holder->name());
2919 arg_num++;
2920 }
2921 for (SignatureStream ss(_method->signature()); !ss.at_return_type(); ss.next()) {
2922 BasicType bt = ss.type();
2923 if (InlineTypePassFieldsAsArgs && bt == T_OBJECT) {
2924 InlineKlass* vk = ss.as_inline_klass(holder);
2925 if (vk != nullptr && vk->can_be_passed_as_fields() && (init || _method->is_scalarized_arg(arg_num))) {
2926 // Check for a calling convention mismatch with super method(s)
2927 bool scalar_super = false;
2928 bool non_scalar_super = false;
2929 GrowableArray<Method*>* supers = get_supers();
2930 for (int i = 0; i < supers->length(); ++i) {
2931 Method* super_method = supers->at(i);
2932 if (super_method->is_scalarized_arg(arg_num)) {
2933 scalar_super = true;
2934 } else {
2935 non_scalar_super = true;
2936 }
2937 }
2938 #ifdef ASSERT
2939 // Randomly enable below code paths for stress testing
2940 bool stress = init && StressCallingConvention;
2941 if (stress && (os::random() & 1) == 1) {
2942 non_scalar_super = true;
2943 if ((os::random() & 1) == 1) {
2944 scalar_super = true;
2945 }
2946 }
2947 #endif
2948 if (non_scalar_super) {
2949 // Found a super method with a non-scalarized argument. Fall back to the non-scalarized calling convention.
2950 if (scalar_super) {
2951 // Found non-scalar *and* scalar super methods. We can't handle both.
2952 // Mark the scalar method as mismatch and re-compile call sites to use non-scalarized calling convention.
2953 for (int i = 0; i < supers->length(); ++i) {
2954 Method* super_method = supers->at(i);
2955 if (super_method->is_scalarized_arg(arg_num) DEBUG_ONLY(|| (stress && (os::random() & 1) == 1))) {
2956 JavaThread* thread = JavaThread::current();
2957 HandleMark hm(thread);
2958 methodHandle mh(thread, super_method);
2959 DeoptimizationScope deopt_scope;
2960 {
2961 // Keep the lock scope minimal. Prevent interference with other
2962 // dependency checks by setting mismatch and marking within the lock.
2963 MutexLocker ml(Compile_lock, Mutex::_safepoint_check_flag);
2964 super_method->set_mismatch();
2965 CodeCache::mark_for_deoptimization(&deopt_scope, mh());
2966 }
2967 deopt_scope.deoptimize_marked();
2968 }
2969 }
2970 }
2971 // Fall back to non-scalarized calling convention
2972 SigEntry::add_entry(_sig_cc, T_OBJECT, ss.as_symbol());
2973 SigEntry::add_entry(_sig_cc_ro, T_OBJECT, ss.as_symbol());
2974 } else {
2975 _num_inline_args++;
2976 has_scalarized = true;
2977 int last = _sig_cc->length();
2978 int last_ro = _sig_cc_ro->length();
2979 _sig_cc->appendAll(vk->extended_sig());
2980 _sig_cc_ro->appendAll(vk->extended_sig());
2981 // buffer argument
2982 _sig_cc->insert_before(last + 1, SigEntry(T_OBJECT, 0, nullptr, false, true));
2983 _sig_cc_ro->insert_before(last_ro + 1, SigEntry(T_OBJECT, 0, nullptr, false, true));
2984 // Insert InlineTypeNode::NullMarker field right after T_METADATA delimiter
2985 _sig_cc->insert_before(last + 2, SigEntry(T_BOOLEAN, -1, nullptr, true, false));
2986 _sig_cc_ro->insert_before(last_ro + 2, SigEntry(T_BOOLEAN, -1, nullptr, true, false));
2987 }
2988 } else {
2989 SigEntry::add_entry(_sig_cc, T_OBJECT, ss.as_symbol());
2990 SigEntry::add_entry(_sig_cc_ro, T_OBJECT, ss.as_symbol());
2991 }
2992 bt = T_OBJECT;
2993 } else {
2994 SigEntry::add_entry(_sig_cc, ss.type(), ss.as_symbol());
2995 SigEntry::add_entry(_sig_cc_ro, ss.type(), ss.as_symbol());
2996 }
2997 SigEntry::add_entry(_sig, bt, ss.as_symbol());
2998 if (bt != T_VOID) {
2999 arg_num++;
3000 }
3001 }
3002 }
3003
3004 // Compute the non-scalarized calling convention
3005 _regs = NEW_RESOURCE_ARRAY(VMRegPair, _sig->length());
3006 _args_on_stack = SharedRuntime::java_calling_convention(_sig, _regs);
3007
3008 // Compute the scalarized calling conventions if there are scalarized inline types in the signature
3009 if (has_scalarized && !_method->is_native()) {
3010 _regs_cc = NEW_RESOURCE_ARRAY(VMRegPair, _sig_cc->length());
3011 _args_on_stack_cc = SharedRuntime::java_calling_convention(_sig_cc, _regs_cc);
3012
3013 _regs_cc_ro = NEW_RESOURCE_ARRAY(VMRegPair, _sig_cc_ro->length());
3014 _args_on_stack_cc_ro = SharedRuntime::java_calling_convention(_sig_cc_ro, _regs_cc_ro);
3015
3016 _c1_needs_stack_repair = (_args_on_stack_cc < _args_on_stack) || (_args_on_stack_cc_ro < _args_on_stack);
3017 _c2_needs_stack_repair = (_args_on_stack_cc > _args_on_stack) || (_args_on_stack_cc > _args_on_stack_cc_ro);
3018
3019 // Upper bound on stack arguments to avoid hitting the argument limit and
3020 // bailing out of compilation ("unsupported incoming calling sequence").
3021 // TODO 8281260 We need a reasonable limit (flag?) here
3022 if (MAX2(_args_on_stack_cc, _args_on_stack_cc_ro) <= 75) {
3023 return; // Success
3024 }
3025 }
3026
3027 // No scalarized args
3028 _sig_cc = _sig;
3029 _regs_cc = _regs;
3030 _args_on_stack_cc = _args_on_stack;
3031
3032 _sig_cc_ro = _sig;
3033 _regs_cc_ro = _regs;
3034 _args_on_stack_cc_ro = _args_on_stack;
3035 }
3036
3037 void CompiledEntrySignature::initialize_from_fingerprint(AdapterFingerPrint* fingerprint) {
3038 _has_inline_recv = fingerprint->has_ro_adapter();
3039
3040 int value_object_count = 0;
3041 BasicType prev_bt = T_ILLEGAL;
3042 bool has_scalarized_arguments = false;
3043 bool long_prev = false;
3044 int long_prev_offset = -1;
3045 bool skipping_inline_recv = false;
3046 bool receiver_handled = false;
3047
3048 fingerprint->iterate_args([&] (const AdapterFingerPrint::Element& arg) {
3049 BasicType bt = arg.bt();
3050 int offset = arg.offset();
3051
3052 if (long_prev) {
3053 long_prev = false;
3054 BasicType bt_to_add;
3055 if (bt == T_VOID) {
3056 bt_to_add = T_LONG;
3057 } else {
3058 bt_to_add = T_OBJECT;
3059 }
3060 if (value_object_count == 0) {
3061 SigEntry::add_entry(_sig, bt_to_add);
3062 }
3063 assert(long_prev_offset != 0, "no buffer argument here");
3064 SigEntry::add_entry(_sig_cc, bt_to_add, nullptr, long_prev_offset);
3065 if (!skipping_inline_recv) {
3066 SigEntry::add_entry(_sig_cc_ro, bt_to_add, nullptr, long_prev_offset);
3067 }
3068 }
3069
3070 switch (bt) {
3071 case T_VOID:
3072 if (prev_bt != T_LONG && prev_bt != T_DOUBLE) {
3073 assert(InlineTypePassFieldsAsArgs, "unexpected end of inline type");
3074 value_object_count--;
3075 SigEntry::add_entry(_sig_cc, T_VOID, nullptr, offset);
3076 if (!skipping_inline_recv) {
3077 SigEntry::add_entry(_sig_cc_ro, T_VOID, nullptr, offset);
3078 } else if (value_object_count == 0) {
3079 skipping_inline_recv = false;
3080 }
3081 assert(value_object_count >= 0, "invalid value object count");
3082 } else {
3083 // Nothing to add for _sig: We already added an addition T_VOID in add_entry() when adding T_LONG or T_DOUBLE.
3084 }
3085 break;
3086 case T_INT:
3087 case T_FLOAT:
3088 case T_DOUBLE:
3089 if (value_object_count == 0) {
3090 SigEntry::add_entry(_sig, bt);
3091 }
3092 SigEntry::add_entry(_sig_cc, bt, nullptr, offset);
3093 if (!skipping_inline_recv) {
3094 SigEntry::add_entry(_sig_cc_ro, bt, nullptr, offset);
3095 }
3096 break;
3097 case T_LONG:
3098 long_prev = true;
3099 long_prev_offset = offset;
3100 break;
3101 case T_BOOLEAN:
3102 case T_CHAR:
3103 case T_BYTE:
3104 case T_SHORT:
3105 case T_OBJECT:
3106 case T_ARRAY:
3107 assert(value_object_count > 0, "must be value object field");
3108 assert(offset != 0 || (bt == T_OBJECT && prev_bt == T_METADATA), "buffer input expected here");
3109 SigEntry::add_entry(_sig_cc, bt, nullptr, offset, offset == -1, offset == 0);
3110 if (!skipping_inline_recv) {
3111 SigEntry::add_entry(_sig_cc_ro, bt, nullptr, offset, offset == -1, offset == 0);
3112 }
3113 break;
3114 case T_METADATA:
3115 assert(InlineTypePassFieldsAsArgs, "unexpected start of inline type");
3116 if (value_object_count == 0) {
3117 SigEntry::add_entry(_sig, T_OBJECT);
3118 }
3119 SigEntry::add_entry(_sig_cc, T_METADATA, nullptr, offset);
3120 if (!skipping_inline_recv) {
3121 if (!receiver_handled && _has_inline_recv && value_object_count == 0) {
3122 SigEntry::add_entry(_sig_cc_ro, T_OBJECT);
3123 skipping_inline_recv = true;
3124 receiver_handled = true;
3125 } else {
3126 SigEntry::add_entry(_sig_cc_ro, T_METADATA, nullptr, offset);
3127 }
3128 }
3129 value_object_count++;
3130 has_scalarized_arguments = true;
3131 break;
3132 default: {
3133 fatal("Unexpected BasicType: %s", basictype_to_str(bt));
3134 }
3135 }
3136 prev_bt = bt;
3137 });
3138
3139 if (long_prev) {
3140 // If previous bt was T_LONG and we reached the end of the signature, we know that it must be a T_OBJECT.
3141 SigEntry::add_entry(_sig, T_OBJECT);
3142 SigEntry::add_entry(_sig_cc, T_OBJECT);
3143 SigEntry::add_entry(_sig_cc_ro, T_OBJECT);
3144 }
3145 assert(value_object_count == 0, "invalid value object count");
3146
3147 #ifdef ASSERT
3148 if (_has_inline_recv) {
3149 // In RO signatures, inline receivers must be represented as a single T_OBJECT
3150 assert(_sig_cc_ro->length() >= 1, "sig_cc_ro must include receiver");
3151 assert(_sig_cc_ro->at(0)._bt == T_OBJECT,
3152 "sig_cc_ro must represent inline receiver as T_OBJECT");
3153 assert(_sig_cc_ro->length() <= _sig_cc->length(),
3154 "sig_cc_ro must not be longer than sig_cc");
3155 }
3156 #endif
3157
3158 _regs = NEW_RESOURCE_ARRAY(VMRegPair, _sig->length());
3159 _args_on_stack = SharedRuntime::java_calling_convention(_sig, _regs);
3160
3161 // Compute the scalarized calling conventions if there are scalarized inline types in the signature
3162 if (has_scalarized_arguments) {
3163 _regs_cc = NEW_RESOURCE_ARRAY(VMRegPair, _sig_cc->length());
3164 _args_on_stack_cc = SharedRuntime::java_calling_convention(_sig_cc, _regs_cc);
3165
3166 _regs_cc_ro = NEW_RESOURCE_ARRAY(VMRegPair, _sig_cc_ro->length());
3167 _args_on_stack_cc_ro = SharedRuntime::java_calling_convention(_sig_cc_ro, _regs_cc_ro);
3168
3169 _c1_needs_stack_repair = (_args_on_stack_cc < _args_on_stack) || (_args_on_stack_cc_ro < _args_on_stack);
3170 _c2_needs_stack_repair = (_args_on_stack_cc > _args_on_stack) || (_args_on_stack_cc > _args_on_stack_cc_ro);
3171 } else {
3172 // No scalarized args
3173 _sig_cc = _sig;
3174 _regs_cc = _regs;
3175 _args_on_stack_cc = _args_on_stack;
3176
3177 _sig_cc_ro = _sig;
3178 _regs_cc_ro = _regs;
3179 _args_on_stack_cc_ro = _args_on_stack;
3180 }
3181
3182 #ifdef ASSERT
3183 {
3184 AdapterFingerPrint* compare_fp = AdapterFingerPrint::allocate(_sig_cc, _has_inline_recv);
3185 assert(fingerprint->equals(compare_fp), "%s - %s", fingerprint->as_string(), compare_fp->as_string());
3186 AdapterFingerPrint::deallocate(compare_fp);
3187 }
3188 #endif
3189 }
3190
3191 const char* AdapterHandlerEntry::_entry_names[] = {
3192 "i2c", "c2i", "c2i_unverified", "c2i_no_clinit_check"
3193 };
3194
3195 #ifdef ASSERT
3196 void AdapterHandlerLibrary::verify_adapter_sharing(CompiledEntrySignature& ces, AdapterHandlerEntry* cached_entry) {
3197 // we can only check for the same code if there is any
3198 #ifndef ZERO
3199 AdapterHandlerEntry* comparison_entry = create_adapter(ces, false, true);
3200 assert(comparison_entry->adapter_blob() == nullptr, "no blob should be created when creating an adapter for comparison");
3201 assert(comparison_entry->compare_code(cached_entry), "code must match");
3202 // Release the one just created
3203 AdapterHandlerEntry::deallocate(comparison_entry);
3204 # endif // ZERO
3205 }
3206 #endif /* ASSERT*/
3207
3208 AdapterHandlerEntry* AdapterHandlerLibrary::get_adapter(const methodHandle& method) {
3209 assert(!method->is_abstract() || InlineTypePassFieldsAsArgs, "abstract methods do not have adapters");
3210 // Use customized signature handler. Need to lock around updates to
3211 // the _adapter_handler_table (it is not safe for concurrent readers
3212 // and a single writer: this could be fixed if it becomes a
3213 // problem).
3214
3215 // Fast-path for trivial adapters
3216 AdapterHandlerEntry* entry = get_simple_adapter(method);
3217 if (entry != nullptr) {
3218 return entry;
3219 }
3220
3221 ResourceMark rm;
3222 bool new_entry = false;
3223
3224 CompiledEntrySignature ces(method());
3225 ces.compute_calling_conventions();
3226 if (ces.has_scalarized_args()) {
3227 if (!method->has_scalarized_args()) {
3228 method->set_has_scalarized_args();
3229 }
3230 if (ces.c1_needs_stack_repair()) {
3231 method->set_c1_needs_stack_repair();
3232 }
3233 if (ces.c2_needs_stack_repair() && !method->c2_needs_stack_repair()) {
3234 method->set_c2_needs_stack_repair();
3235 }
3236 }
3237
3238 {
3239 MutexLocker mu(AdapterHandlerLibrary_lock);
3240
3241 // Lookup method signature's fingerprint
3242 entry = lookup(ces.sig_cc(), ces.has_inline_recv());
3243
3244 if (entry != nullptr) {
3245 #ifndef ZERO
3246 assert(entry->is_linked(), "AdapterHandlerEntry must have been linked");
3247 #endif
3248 #ifdef ASSERT
3249 if (!entry->in_aot_cache() && VerifyAdapterSharing) {
3250 verify_adapter_sharing(ces, entry);
3251 }
3252 #endif
3253 } else {
3254 entry = create_adapter(ces, /* allocate_code_blob */ true);
3255 if (entry != nullptr) {
3256 new_entry = true;
3257 }
3258 }
3259 }
3260
3261 // Outside of the lock
3262 if (new_entry) {
3263 post_adapter_creation(entry);
3264 }
3265 return entry;
3266 }
3267
3268 void AdapterHandlerLibrary::lookup_aot_cache(AdapterHandlerEntry* handler) {
3269 ResourceMark rm;
3270 const char* name = AdapterHandlerLibrary::name(handler);
3271 const uint32_t id = AdapterHandlerLibrary::id(handler);
3272
3273 CodeBlob* blob = AOTCodeCache::load_code_blob(AOTCodeEntry::Adapter, id, name);
3274 if (blob != nullptr) {
3289 }
3290 insts_size = adapter_blob->code_size();
3291 st->print_cr("i2c argument handler for: %s %s (%d bytes generated)",
3292 handler->fingerprint()->as_basic_args_string(),
3293 handler->fingerprint()->as_string(), insts_size);
3294 st->print_cr("c2i argument handler starts at " INTPTR_FORMAT, p2i(handler->get_c2i_entry()));
3295 if (Verbose || PrintStubCode) {
3296 address first_pc = adapter_blob->content_begin();
3297 if (first_pc != nullptr) {
3298 Disassembler::decode(first_pc, first_pc + insts_size, st, &adapter_blob->asm_remarks());
3299 st->cr();
3300 }
3301 }
3302 }
3303 #endif // PRODUCT
3304
3305 void AdapterHandlerLibrary::address_to_offset(address entry_address[AdapterBlob::ENTRY_COUNT],
3306 int entry_offset[AdapterBlob::ENTRY_COUNT]) {
3307 entry_offset[AdapterBlob::I2C] = 0;
3308 entry_offset[AdapterBlob::C2I] = entry_address[AdapterBlob::C2I] - entry_address[AdapterBlob::I2C];
3309 entry_offset[AdapterBlob::C2I_Inline] = entry_address[AdapterBlob::C2I_Inline] - entry_address[AdapterBlob::I2C];
3310 entry_offset[AdapterBlob::C2I_Inline_RO] = entry_address[AdapterBlob::C2I_Inline_RO] - entry_address[AdapterBlob::I2C];
3311 entry_offset[AdapterBlob::C2I_Unverified] = entry_address[AdapterBlob::C2I_Unverified] - entry_address[AdapterBlob::I2C];
3312 entry_offset[AdapterBlob::C2I_Unverified_Inline] = entry_address[AdapterBlob::C2I_Unverified_Inline] - entry_address[AdapterBlob::I2C];
3313 if (entry_address[AdapterBlob::C2I_No_Clinit_Check] == nullptr) {
3314 entry_offset[AdapterBlob::C2I_No_Clinit_Check] = -1;
3315 } else {
3316 entry_offset[AdapterBlob::C2I_No_Clinit_Check] = entry_address[AdapterBlob::C2I_No_Clinit_Check] - entry_address[AdapterBlob::I2C];
3317 }
3318 }
3319
3320 bool AdapterHandlerLibrary::generate_adapter_code(AdapterHandlerEntry* handler,
3321 CompiledEntrySignature& ces,
3322 bool allocate_code_blob,
3323 bool is_transient) {
3324 if (log_is_enabled(Info, perf, class, link)) {
3325 ClassLoader::perf_method_adapters_count()->inc();
3326 }
3327
3328 #ifndef ZERO
3329 AdapterBlob* adapter_blob = nullptr;
3330 BufferBlob* buf = buffer_blob(); // the temporary code buffer in CodeCache
3331 CodeBuffer buffer(buf);
3332 short buffer_locs[20];
3333 buffer.insts()->initialize_shared_locs((relocInfo*)buffer_locs,
3334 sizeof(buffer_locs)/sizeof(relocInfo));
3335 MacroAssembler masm(&buffer);
3336 address entry_address[AdapterBlob::ENTRY_COUNT];
3337
3338 // Get a description of the compiled java calling convention and the largest used (VMReg) stack slot usage
3339 SharedRuntime::generate_i2c2i_adapters(&masm,
3340 ces.args_on_stack(),
3341 ces.sig(),
3342 ces.regs(),
3343 ces.sig_cc(),
3344 ces.regs_cc(),
3345 ces.sig_cc_ro(),
3346 ces.regs_cc_ro(),
3347 entry_address,
3348 adapter_blob,
3349 allocate_code_blob);
3350
3351 if (ces.has_scalarized_args()) {
3352 // Save a C heap allocated version of the scalarized signature and store it in the adapter
3353 GrowableArray<SigEntry>* heap_sig = new (mtInternal) GrowableArray<SigEntry>(ces.sig_cc()->length(), mtInternal);
3354 heap_sig->appendAll(ces.sig_cc());
3355 handler->set_sig_cc(heap_sig);
3356 heap_sig = new (mtInternal) GrowableArray<SigEntry>(ces.sig_cc_ro()->length(), mtInternal);
3357 heap_sig->appendAll(ces.sig_cc_ro());
3358 handler->set_sig_cc_ro(heap_sig);
3359 }
3360 // On zero there is no code to save and no need to create a blob and
3361 // or relocate the handler.
3362 int entry_offset[AdapterBlob::ENTRY_COUNT];
3363 address_to_offset(entry_address, entry_offset);
3364 #ifdef ASSERT
3365 if (VerifyAdapterSharing) {
3366 handler->save_code(buf->code_begin(), buffer.insts_size());
3367 if (is_transient) {
3368 return true;
3369 }
3370 }
3371 #endif
3372 if (adapter_blob == nullptr) {
3373 // CodeCache is full, disable compilation
3374 // Ought to log this but compile log is only per compile thread
3375 // and we're some non descript Java thread.
3376 return false;
3377 }
3378 handler->set_adapter_blob(adapter_blob);
3379 if (!is_transient && AOTCodeCache::is_dumping_adapter()) {
3380 // try to save generated code
3381 const char* name = AdapterHandlerLibrary::name(handler);
3382 const uint32_t id = AdapterHandlerLibrary::id(handler);
3383 bool success = AOTCodeCache::store_code_blob(*adapter_blob, AOTCodeEntry::Adapter, id, name);
3384 assert(success || !AOTCodeCache::is_dumping_adapter(), "caching of adapter must be disabled");
3385 }
3386 #endif // ZERO
3387
3388 #ifndef PRODUCT
3389 // debugging support
3390 if (PrintAdapterHandlers || PrintStubCode) {
3391 print_adapter_handler_info(tty, handler);
3392 }
3393 #endif
3394
3395 return true;
3396 }
3397
3398 AdapterHandlerEntry* AdapterHandlerLibrary::create_adapter(CompiledEntrySignature& ces,
3399 bool allocate_code_blob,
3400 bool is_transient) {
3401 AdapterFingerPrint* fp = AdapterFingerPrint::allocate(ces.sig_cc(), ces.has_inline_recv());
3402 #ifdef ASSERT
3403 // Verify that we can successfully restore the compiled entry signature object.
3404 CompiledEntrySignature ces_verify;
3405 ces_verify.initialize_from_fingerprint(fp);
3406 #endif
3407 AdapterHandlerEntry* handler = AdapterHandlerLibrary::new_entry(fp);
3408 if (!generate_adapter_code(handler, ces, allocate_code_blob, is_transient)) {
3409 AdapterHandlerEntry::deallocate(handler);
3410 return nullptr;
3411 }
3412 if (!is_transient) {
3413 assert_lock_strong(AdapterHandlerLibrary_lock);
3414 _adapter_handler_table->put(fp, handler);
3415 }
3416 return handler;
3417 }
3418
3419 #if INCLUDE_CDS
3420 void AdapterHandlerEntry::remove_unshareable_info() {
3421 #ifdef ASSERT
3422 _saved_code = nullptr;
3423 _saved_code_length = 0;
3424 #endif // ASSERT
3425 _adapter_blob = nullptr;
3426 _linked = false;
3427 _sig_cc = nullptr;
3428 _sig_cc_ro = nullptr;
3429 }
3430
3431 class CopyAdapterTableToArchive : StackObj {
3432 private:
3433 CompactHashtableWriter* _writer;
3434 ArchiveBuilder* _builder;
3435 public:
3436 CopyAdapterTableToArchive(CompactHashtableWriter* writer) : _writer(writer),
3437 _builder(ArchiveBuilder::current())
3438 {}
3439
3440 bool do_entry(AdapterFingerPrint* fp, AdapterHandlerEntry* entry) {
3441 LogStreamHandle(Trace, aot) lsh;
3442 if (ArchiveBuilder::current()->has_been_archived((address)entry)) {
3443 assert(ArchiveBuilder::current()->has_been_archived((address)fp), "must be");
3444 AdapterFingerPrint* buffered_fp = ArchiveBuilder::current()->get_buffered_addr(fp);
3445 assert(buffered_fp != nullptr,"sanity check");
3446 AdapterHandlerEntry* buffered_entry = ArchiveBuilder::current()->get_buffered_addr(entry);
3447 assert(buffered_entry != nullptr,"sanity check");
3448
3488 }
3489 #endif
3490 }
3491
3492 // This method is used during production run to link archived adapters (stored in AOT Cache)
3493 // to their code in AOT Code Cache
3494 void AdapterHandlerEntry::link() {
3495 ResourceMark rm;
3496 assert(_fingerprint != nullptr, "_fingerprint must not be null");
3497 bool generate_code = false;
3498 // Generate code only if AOTCodeCache is not available, or
3499 // caching adapters is disabled, or we fail to link
3500 // the AdapterHandlerEntry to its code in the AOTCodeCache
3501 if (AOTCodeCache::is_using_adapter()) {
3502 AdapterHandlerLibrary::link_aot_adapter_handler(this);
3503 // If link_aot_adapter_handler() succeeds, _adapter_blob will be non-null
3504 if (_adapter_blob == nullptr) {
3505 log_warning(aot)("Failed to link AdapterHandlerEntry (fp=%s) to its code in the AOT code cache", _fingerprint->as_basic_args_string());
3506 generate_code = true;
3507 }
3508
3509 if (get_sig_cc() == nullptr) {
3510 // Calling conventions have to be regenerated at runtime and are accessed through method adapters,
3511 // which are archived in the AOT code cache. If the adapters are not regenerated, the
3512 // calling conventions should be regenerated here.
3513 CompiledEntrySignature ces;
3514 ces.initialize_from_fingerprint(_fingerprint);
3515 if (ces.has_scalarized_args()) {
3516 // Save a C heap allocated version of the scalarized signature and store it in the adapter
3517 GrowableArray<SigEntry>* heap_sig = new (mtInternal) GrowableArray<SigEntry>(ces.sig_cc()->length(), mtInternal);
3518 heap_sig->appendAll(ces.sig_cc());
3519 set_sig_cc(heap_sig);
3520 heap_sig = new (mtInternal) GrowableArray<SigEntry>(ces.sig_cc_ro()->length(), mtInternal);
3521 heap_sig->appendAll(ces.sig_cc_ro());
3522 set_sig_cc_ro(heap_sig);
3523 }
3524 }
3525 } else {
3526 generate_code = true;
3527 }
3528 if (generate_code) {
3529 CompiledEntrySignature ces;
3530 ces.initialize_from_fingerprint(_fingerprint);
3531 if (!AdapterHandlerLibrary::generate_adapter_code(this, ces, true, false)) {
3532 // Don't throw exceptions during VM initialization because java.lang.* classes
3533 // might not have been initialized, causing problems when constructing the
3534 // Java exception object.
3535 vm_exit_during_initialization("Out of space in CodeCache for adapters");
3536 }
3537 }
3538 if (_adapter_blob != nullptr) {
3539 post_adapter_creation(this);
3540 }
3541 assert(_linked, "AdapterHandlerEntry must now be linked");
3542 }
3543
3544 void AdapterHandlerLibrary::link_aot_adapters() {
3545 uint max_id = 0;
3546 assert(AOTCodeCache::is_using_adapter(), "AOT adapters code should be available");
3547 /* It is possible that some adapters generated in assembly phase are not stored in the cache.
3548 * That implies adapter ids of the adapters in the cache may not be contiguous.
3549 * If the size of the _aot_adapter_handler_table is used to initialize _id_counter, then it may
3550 * result in collision of adapter ids between AOT stored handlers and runtime generated handlers.
3551 * To avoid such situation, initialize the _id_counter with the largest adapter id among the AOT stored handlers.
3552 */
3553 _aot_adapter_handler_table.iterate_all([&](AdapterHandlerEntry* entry) {
3554 assert(!entry->is_linked(), "AdapterHandlerEntry is already linked!");
3555 entry->link();
3556 max_id = MAX2(max_id, entry->id());
3557 });
3558 // Set adapter id to the maximum id found in the AOTCache
3559 assert(_id_counter == 0, "Did not expect new AdapterHandlerEntry to be created at this stage");
3560 _id_counter = max_id;
3561 }
3562
3563 // This method is called during production run to lookup simple adapters
3564 // in the archived adapter handler table
3565 void AdapterHandlerLibrary::lookup_simple_adapters() {
3566 assert(!_aot_adapter_handler_table.empty(), "archived adapter handler table is empty");
3567
3568 MutexLocker mu(AdapterHandlerLibrary_lock);
3569 ResourceMark rm;
3570 CompiledEntrySignature no_args;
3571 no_args.compute_calling_conventions();
3572 _no_arg_handler = lookup(no_args.sig_cc(), no_args.has_inline_recv());
3573
3574 CompiledEntrySignature obj_args;
3575 SigEntry::add_entry(obj_args.sig(), T_OBJECT);
3576 obj_args.compute_calling_conventions();
3577 _obj_arg_handler = lookup(obj_args.sig_cc(), obj_args.has_inline_recv());
3578
3579 CompiledEntrySignature int_args;
3580 SigEntry::add_entry(int_args.sig(), T_INT);
3581 int_args.compute_calling_conventions();
3582 _int_arg_handler = lookup(int_args.sig_cc(), int_args.has_inline_recv());
3583
3584 CompiledEntrySignature obj_int_args;
3585 SigEntry::add_entry(obj_int_args.sig(), T_OBJECT);
3586 SigEntry::add_entry(obj_int_args.sig(), T_INT);
3587 obj_int_args.compute_calling_conventions();
3588 _obj_int_arg_handler = lookup(obj_int_args.sig_cc(), obj_int_args.has_inline_recv());
3589
3590 CompiledEntrySignature obj_obj_args;
3591 SigEntry::add_entry(obj_obj_args.sig(), T_OBJECT);
3592 SigEntry::add_entry(obj_obj_args.sig(), T_OBJECT);
3593 obj_obj_args.compute_calling_conventions();
3594 _obj_obj_arg_handler = lookup(obj_obj_args.sig_cc(), obj_obj_args.has_inline_recv());
3595
3596 assert(_no_arg_handler != nullptr &&
3597 _obj_arg_handler != nullptr &&
3598 _int_arg_handler != nullptr &&
3599 _obj_int_arg_handler != nullptr &&
3600 _obj_obj_arg_handler != nullptr, "Initial adapters not found in archived adapter handler table");
3601 assert(_no_arg_handler->is_linked() &&
3602 _obj_arg_handler->is_linked() &&
3603 _int_arg_handler->is_linked() &&
3604 _obj_int_arg_handler->is_linked() &&
3605 _obj_obj_arg_handler->is_linked(), "Initial adapters not in linked state");
3606 }
3607 #endif // INCLUDE_CDS
3608
3609 void AdapterHandlerEntry::metaspace_pointers_do(MetaspaceClosure* it) {
3610 LogStreamHandle(Trace, aot) lsh;
3611 if (lsh.is_enabled()) {
3612 lsh.print("Iter(AdapterHandlerEntry): %p(%s)", this, _fingerprint->as_basic_args_string());
3613 lsh.cr();
3614 }
3615 it->push(&_fingerprint);
3616 }
3617
3618 AdapterHandlerEntry::~AdapterHandlerEntry() {
3619 if (_fingerprint != nullptr) {
3620 AdapterFingerPrint::deallocate(_fingerprint);
3621 _fingerprint = nullptr;
3622 }
3623 if (_sig_cc != nullptr) {
3624 delete _sig_cc;
3625 }
3626 if (_sig_cc_ro != nullptr) {
3627 delete _sig_cc_ro;
3628 }
3629 #ifdef ASSERT
3630 FREE_C_HEAP_ARRAY(_saved_code);
3631 #endif
3632 FreeHeap(this);
3633 }
3634
3635
3636 #ifdef ASSERT
3637 // Capture the code before relocation so that it can be compared
3638 // against other versions. If the code is captured after relocation
3639 // then relative instructions won't be equivalent.
3640 void AdapterHandlerEntry::save_code(unsigned char* buffer, int length) {
3641 _saved_code = NEW_C_HEAP_ARRAY(unsigned char, length, mtCode);
3642 _saved_code_length = length;
3643 memcpy(_saved_code, buffer, length);
3644 }
3645
3646
3647 bool AdapterHandlerEntry::compare_code(AdapterHandlerEntry* other) {
3648 assert(_saved_code != nullptr && other->_saved_code != nullptr, "code not saved");
3696
3697 struct { double data[20]; } locs_buf;
3698 struct { double data[20]; } stubs_locs_buf;
3699 buffer.insts()->initialize_shared_locs((relocInfo*)&locs_buf, sizeof(locs_buf) / sizeof(relocInfo));
3700 #if defined(AARCH64) || defined(PPC64)
3701 // On AArch64 with ZGC and nmethod entry barriers, we need all oops to be
3702 // in the constant pool to ensure ordering between the barrier and oops
3703 // accesses. For native_wrappers we need a constant.
3704 // On PPC64 the continuation enter intrinsic needs the constant pool for the compiled
3705 // static java call that is resolved in the runtime.
3706 if (PPC64_ONLY(method->is_continuation_enter_intrinsic() &&) true) {
3707 buffer.initialize_consts_size(8 PPC64_ONLY(+ 24));
3708 }
3709 #endif
3710 buffer.stubs()->initialize_shared_locs((relocInfo*)&stubs_locs_buf, sizeof(stubs_locs_buf) / sizeof(relocInfo));
3711 MacroAssembler _masm(&buffer);
3712
3713 // Fill in the signature array, for the calling-convention call.
3714 const int total_args_passed = method->size_of_parameters();
3715
3716 BasicType stack_sig_bt[16];
3717 VMRegPair stack_regs[16];
3718 BasicType* sig_bt = (total_args_passed <= 16) ? stack_sig_bt : NEW_RESOURCE_ARRAY(BasicType, total_args_passed);
3719 VMRegPair* regs = (total_args_passed <= 16) ? stack_regs : NEW_RESOURCE_ARRAY(VMRegPair, total_args_passed);
3720
3721 int i = 0;
3722 if (!method->is_static()) { // Pass in receiver first
3723 sig_bt[i++] = T_OBJECT;
3724 }
3725 SignatureStream ss(method->signature());
3726 for (; !ss.at_return_type(); ss.next()) {
3727 sig_bt[i++] = ss.type(); // Collect remaining bits of signature
3728 if (ss.type() == T_LONG || ss.type() == T_DOUBLE) {
3729 sig_bt[i++] = T_VOID; // Longs & doubles take 2 Java slots
3730 }
3731 }
3732 assert(i == total_args_passed, "");
3733 BasicType ret_type = ss.type();
3734
3735 // Now get the compiled-Java arguments layout.
3736 SharedRuntime::java_calling_convention(sig_bt, regs, total_args_passed);
3737
3738 // Generate the compiled-to-native wrapper code
3739 nm = SharedRuntime::generate_native_wrapper(&_masm, method, compile_id, sig_bt, regs, ret_type);
3740
3741 if (nm != nullptr) {
3742 {
3743 MutexLocker pl(NMethodState_lock, Mutex::_no_safepoint_check_flag);
3744 if (nm->make_in_use()) {
3745 method->set_code(method, nm);
3746 }
3747 }
3748
3749 DirectiveSet* directive = DirectivesStack::getMatchingDirective(method, CompileBroker::compiler(CompLevel_simple));
3750 if (directive->PrintAssemblyOption) {
3751 nm->print_code();
3752 }
3753 DirectivesStack::release(directive);
3961 if (b == handler->adapter_blob()) {
3962 found = true;
3963 st->print("Adapter for signature: ");
3964 handler->print_adapter_on(st);
3965 return false; // abort iteration
3966 } else {
3967 return true; // keep looking
3968 }
3969 };
3970 assert_locked_or_safepoint(AdapterHandlerLibrary_lock);
3971 _adapter_handler_table->iterate(findblob_runtime_table);
3972 }
3973 assert(found, "Should have found handler");
3974 }
3975
3976 void AdapterHandlerEntry::print_adapter_on(outputStream* st) const {
3977 st->print("AHE@" INTPTR_FORMAT ": %s", p2i(this), fingerprint()->as_string());
3978 if (adapter_blob() != nullptr) {
3979 st->print(" i2c: " INTPTR_FORMAT, p2i(get_i2c_entry()));
3980 st->print(" c2i: " INTPTR_FORMAT, p2i(get_c2i_entry()));
3981 st->print(" c2iVE: " INTPTR_FORMAT, p2i(get_c2i_inline_entry()));
3982 st->print(" c2iVROE: " INTPTR_FORMAT, p2i(get_c2i_inline_ro_entry()));
3983 st->print(" c2iUE: " INTPTR_FORMAT, p2i(get_c2i_unverified_entry()));
3984 st->print(" c2iUVE: " INTPTR_FORMAT, p2i(get_c2i_unverified_inline_entry()));
3985 if (get_c2i_no_clinit_check_entry() != nullptr) {
3986 st->print(" c2iNCI: " INTPTR_FORMAT, p2i(get_c2i_no_clinit_check_entry()));
3987 }
3988 }
3989 st->cr();
3990 }
3991
3992 #ifndef PRODUCT
3993
3994 void AdapterHandlerLibrary::print_statistics() {
3995 print_table_statistics();
3996 }
3997
3998 #endif /* PRODUCT */
3999
4000 JRT_LEAF(void, SharedRuntime::enable_stack_reserved_zone(JavaThread* current))
4001 assert(current == JavaThread::current(), "pre-condition");
4002 StackOverflow* overflow_state = current->stack_overflow_state();
4003 overflow_state->enable_stack_reserved_zone(/*check_if_disabled*/true);
4004 overflow_state->set_reserved_stack_activation(current->stack_base());
4051 event.set_method(method);
4052 event.commit();
4053 }
4054 }
4055 }
4056 return activation;
4057 }
4058
4059 void SharedRuntime::on_slowpath_allocation_exit(JavaThread* current) {
4060 // After any safepoint, just before going back to compiled code,
4061 // we inform the GC that we will be doing initializing writes to
4062 // this object in the future without emitting card-marks, so
4063 // GC may take any compensating steps.
4064
4065 oop new_obj = current->vm_result_oop();
4066 if (new_obj == nullptr) return;
4067
4068 BarrierSet *bs = BarrierSet::barrier_set();
4069 bs->on_slowpath_allocation_exit(current, new_obj);
4070 }
4071
4072 // We are at a compiled code to interpreter call. We need backing
4073 // buffers for all inline type arguments. Allocate an object array to
4074 // hold them (convenient because once we're done with it we don't have
4075 // to worry about freeing it).
4076 oop SharedRuntime::allocate_inline_types_impl(JavaThread* current, methodHandle callee, bool allocate_receiver, bool from_c1, TRAPS) {
4077 assert(InlineTypePassFieldsAsArgs, "no reason to call this");
4078 ResourceMark rm;
4079
4080 // Retrieve arguments passed at the call
4081 RegisterMap reg_map2(THREAD,
4082 RegisterMap::UpdateMap::include,
4083 RegisterMap::ProcessFrames::include,
4084 RegisterMap::WalkContinuation::skip);
4085 frame stubFrame = THREAD->last_frame();
4086 frame callerFrame = stubFrame.sender(®_map2);
4087 if (from_c1) {
4088 callerFrame = callerFrame.sender(®_map2);
4089 }
4090 int arg_size;
4091 const GrowableArray<SigEntry>* sig = allocate_receiver ? callee->adapter()->get_sig_cc() : callee->adapter()->get_sig_cc_ro();
4092 assert(sig != nullptr, "sig should never be null");
4093 TempNewSymbol tmp_sig = SigEntry::create_symbol(sig);
4094 VMRegPair* reg_pairs = find_callee_arguments(tmp_sig, false, false, &arg_size);
4095
4096 int nb_slots = 0;
4097 InstanceKlass* holder = callee->method_holder();
4098 allocate_receiver &= !callee->is_static() && holder->is_inline_klass() && callee->is_scalarized_arg(0);
4099 if (allocate_receiver) {
4100 nb_slots++;
4101 }
4102 int arg_num = callee->is_static() ? 0 : 1;
4103 for (SignatureStream ss(callee->signature()); !ss.at_return_type(); ss.next()) {
4104 BasicType bt = ss.type();
4105 if (bt == T_OBJECT && callee->is_scalarized_arg(arg_num)) {
4106 nb_slots++;
4107 }
4108 if (bt != T_VOID) {
4109 arg_num++;
4110 }
4111 }
4112 objArrayOop array_oop = nullptr;
4113 objArrayHandle array;
4114 arg_num = callee->is_static() ? 0 : 1;
4115 int i = 0;
4116 uint pos = 0;
4117 uint depth = 0;
4118 uint ignored = 0;
4119 if (allocate_receiver) {
4120 assert(sig->at(pos)._bt == T_METADATA, "scalarized value expected");
4121 pos++;
4122 ignored++;
4123 depth++;
4124 assert(sig->at(pos)._bt == T_OBJECT, "buffer argument");
4125 uint reg_pos = 0;
4126 assert(reg_pos < (uint)arg_size, "");
4127 VMRegPair reg_pair = reg_pairs[reg_pos];
4128 oop* buffer = callerFrame.oopmapreg_to_oop_location(reg_pair.first(), ®_map2);
4129 instanceHandle h_buffer(THREAD, (instanceOop)*buffer);
4130 InlineKlass* vk = InlineKlass::cast(holder);
4131 if (h_buffer.not_null()) {
4132 assert(h_buffer->klass() == vk, "buffer not of expected class");
4133 } else {
4134 // Only allocate if buffer passed at the call is null
4135 if (array_oop == nullptr) {
4136 array_oop = oopFactory::new_objectArray(nb_slots, CHECK_NULL);
4137 array = objArrayHandle(THREAD, array_oop);
4138 }
4139 oop res = vk->allocate_instance(CHECK_NULL);
4140 array->obj_at_put(i, res);
4141 }
4142 i++;
4143 }
4144 for (SignatureStream ss(callee->signature()); !ss.at_return_type(); ss.next()) {
4145 BasicType bt = ss.type();
4146 if (bt == T_OBJECT && callee->is_scalarized_arg(arg_num)) {
4147 while (true) {
4148 BasicType bt = sig->at(pos)._bt;
4149 if (bt == T_METADATA) {
4150 depth++;
4151 ignored++;
4152 if (depth == 1) {
4153 break;
4154 }
4155 } else if (bt == T_VOID && sig->at(pos - 1)._bt != T_LONG && sig->at(pos - 1)._bt != T_DOUBLE) {
4156 ignored++;
4157 depth--;
4158 }
4159 pos++;
4160 }
4161 pos++;
4162 assert(sig->at(pos)._bt == T_OBJECT, "buffer argument expected");
4163 uint reg_pos = pos - ignored;
4164 assert(reg_pos < (uint)arg_size, "out of bound register?");
4165 VMRegPair reg_pair = reg_pairs[reg_pos];
4166 oop* buffer = callerFrame.oopmapreg_to_oop_location(reg_pair.first(), ®_map2);
4167 instanceHandle h_buffer(THREAD, (instanceOop)*buffer);
4168 InlineKlass* vk = ss.as_inline_klass(holder);
4169 assert(vk != nullptr, "Unexpected klass");
4170 if (h_buffer.not_null()) {
4171 assert(h_buffer->klass() == vk, "buffer not of expected class");
4172 } else {
4173 // Only allocate if buffer passed at the call is null
4174 if (array_oop == nullptr) {
4175 array_oop = oopFactory::new_objectArray(nb_slots, CHECK_NULL);
4176 array = objArrayHandle(THREAD, array_oop);
4177 }
4178 oop res = vk->allocate_instance(CHECK_NULL);
4179 array->obj_at_put(i, res);
4180 }
4181 i++;
4182 }
4183 if (bt != T_VOID) {
4184 arg_num++;
4185 }
4186 }
4187 return array();
4188 }
4189
4190 JRT_ENTRY(void, SharedRuntime::allocate_inline_types(JavaThread* current, Method* callee_method, bool allocate_receiver))
4191 methodHandle callee(current, callee_method);
4192 oop array = SharedRuntime::allocate_inline_types_impl(current, callee, allocate_receiver, false, CHECK);
4193 current->set_vm_result_oop(array);
4194 JRT_END
4195
4196 // We're returning from an interpreted method: load each field into a
4197 // register following the calling convention
4198 JRT_LEAF(void, SharedRuntime::load_inline_type_fields_in_regs(JavaThread* current, oopDesc* res))
4199 {
4200 assert(res->klass()->is_inline_klass(), "only inline types here");
4201 ResourceMark rm;
4202 RegisterMap reg_map(current,
4203 RegisterMap::UpdateMap::include,
4204 RegisterMap::ProcessFrames::include,
4205 RegisterMap::WalkContinuation::skip);
4206 frame stubFrame = current->last_frame();
4207 frame callerFrame = stubFrame.sender(®_map);
4208 assert(callerFrame.is_interpreted_frame(), "should be coming from interpreter");
4209
4210 InlineKlass* vk = InlineKlass::cast(res->klass());
4211
4212 const Array<SigEntry>* sig_vk = vk->extended_sig();
4213 const Array<VMRegPair>* regs = vk->return_regs();
4214
4215 if (regs == nullptr) {
4216 // The fields of the inline klass don't fit in registers, bail out
4217 return;
4218 }
4219
4220 int j = 1;
4221 for (int i = 0; i < sig_vk->length(); i++) {
4222 BasicType bt = sig_vk->at(i)._bt;
4223 if (bt == T_METADATA) {
4224 continue;
4225 }
4226 if (bt == T_VOID) {
4227 if (sig_vk->at(i-1)._bt == T_LONG ||
4228 sig_vk->at(i-1)._bt == T_DOUBLE) {
4229 j++;
4230 }
4231 continue;
4232 }
4233 int off = sig_vk->at(i)._offset;
4234 assert(off > 0, "offset in object should be positive");
4235 VMRegPair pair = regs->at(j);
4236 address loc = reg_map.location(pair.first(), nullptr);
4237 guarantee(loc != nullptr, "bad register save location");
4238 switch(bt) {
4239 case T_BOOLEAN:
4240 *(jboolean*)loc = res->bool_field(off);
4241 break;
4242 case T_CHAR:
4243 *(jchar*)loc = res->char_field(off);
4244 break;
4245 case T_BYTE:
4246 *(jbyte*)loc = res->byte_field(off);
4247 break;
4248 case T_SHORT:
4249 *(jshort*)loc = res->short_field(off);
4250 break;
4251 case T_INT: {
4252 *(jint*)loc = res->int_field(off);
4253 break;
4254 }
4255 case T_LONG:
4256 #ifdef _LP64
4257 *(intptr_t*)loc = res->long_field(off);
4258 #else
4259 Unimplemented();
4260 #endif
4261 break;
4262 case T_OBJECT:
4263 case T_ARRAY: {
4264 *(oop*)loc = res->obj_field(off);
4265 break;
4266 }
4267 case T_FLOAT:
4268 *(jfloat*)loc = res->float_field(off);
4269 break;
4270 case T_DOUBLE:
4271 *(jdouble*)loc = res->double_field(off);
4272 break;
4273 default:
4274 ShouldNotReachHere();
4275 }
4276 j++;
4277 }
4278 assert(j == regs->length(), "missed a field?");
4279
4280 #ifdef ASSERT
4281 VMRegPair pair = regs->at(0);
4282 address loc = reg_map.location(pair.first(), nullptr);
4283 assert(*(oopDesc**)loc == res, "overwritten object");
4284 #endif
4285
4286 current->set_vm_result_oop(res);
4287 }
4288 JRT_END
4289
4290 // We've returned to an interpreted method, the interpreter needs a
4291 // reference to an inline type instance. Allocate it and initialize it
4292 // from field's values in registers.
4293 JRT_BLOCK_ENTRY(void, SharedRuntime::store_inline_type_fields_to_buf(JavaThread* current, intptr_t res))
4294 {
4295 ResourceMark rm;
4296 RegisterMap reg_map(current,
4297 RegisterMap::UpdateMap::include,
4298 RegisterMap::ProcessFrames::include,
4299 RegisterMap::WalkContinuation::skip);
4300 frame stubFrame = current->last_frame();
4301 frame callerFrame = stubFrame.sender(®_map);
4302
4303 #ifdef ASSERT
4304 InlineKlass* verif_vk = InlineKlass::returned_inline_klass(reg_map);
4305 #endif
4306
4307 if (!is_set_nth_bit(res, 0)) {
4308 // We're not returning with inline type fields in registers (the
4309 // calling convention didn't allow it for this inline klass)
4310 assert(!Metaspace::contains((void*)res), "should be oop or pointer in buffer area");
4311 current->set_vm_result_oop((oopDesc*)res);
4312 assert(verif_vk == nullptr, "broken calling convention");
4313 return;
4314 }
4315
4316 clear_nth_bit(res, 0);
4317 InlineKlass* vk = (InlineKlass*)res;
4318 assert(verif_vk == vk, "broken calling convention");
4319 assert(Metaspace::contains((void*)res), "should be klass");
4320
4321 // Allocate handles for every oop field so they are safe in case of
4322 // a safepoint when allocating
4323 GrowableArray<Handle> handles;
4324 vk->save_oop_fields(reg_map, handles);
4325
4326 // It's unsafe to safepoint until we are here
4327 JRT_BLOCK;
4328 {
4329 JavaThread* THREAD = current;
4330 oop vt = vk->realloc_result(reg_map, handles, CHECK);
4331 current->set_vm_result_oop(vt);
4332 }
4333 JRT_BLOCK_END;
4334 }
4335 JRT_END
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