| /* | |
| * Copyright (c) 2022, 2025, Oracle and/or its affiliates. All rights reserved. | |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
| * | |
| * This code is free software; you can redistribute it and/or modify it | |
| * under the terms of the GNU General Public License version 2 only, as | |
| * published by the Free Software Foundation. | |
| * | |
| * This code is distributed in the hope that it will be useful, but WITHOUT | |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| * version 2 for more details (a copy is included in the LICENSE file that | |
| * accompanied this code). | |
| * | |
| * You should have received a copy of the GNU General Public License version | |
| * 2 along with this work; if not, write to the Free Software Foundation, | |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| * | |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | |
| * or visit www.oracle.com if you need additional information or have any | |
| * questions. | |
| */ | |
| #include "downcallLinker.hpp" | |
| #include "runtime/interfaceSupport.inline.hpp" | |
| #include <cerrno> | |
| #ifdef _WIN64 | |
| #include <Windows.h> | |
| #include <Winsock2.h> | |
| #endif | |
| // We call this from _thread_in_native, right after a downcall | |
| JVM_LEAF(void, DowncallLinker::capture_state(int32_t* value_ptr, int captured_state_mask)) | |
| // keep in synch with jdk.internal.foreign.abi.CapturableState | |
| enum PreservableValues { | |
| NONE = 0, | |
| GET_LAST_ERROR = 1, | |
| WSA_GET_LAST_ERROR = 1 << 1, | |
| ERRNO = 1 << 2 | |
| }; | |
| #ifdef _WIN64 | |
| if (captured_state_mask & GET_LAST_ERROR) { | |
| *value_ptr = GetLastError(); | |
| } | |
| value_ptr++; | |
| if (captured_state_mask & WSA_GET_LAST_ERROR) { | |
| *value_ptr = WSAGetLastError(); | |
| } | |
| value_ptr++; | |
| #endif | |
| if (captured_state_mask & ERRNO) { | |
| *value_ptr = errno; | |
| } | |
| JVM_END | |
| void DowncallLinker::StubGenerator::add_offsets_to_oops(GrowableArray<VMStorage>& java_regs, VMStorage tmp1, VMStorage tmp2) const { | |
| int reg_idx = 0; | |
| for (int sig_idx = 0; sig_idx < _num_args; sig_idx++) { | |
| if (_signature[sig_idx] == T_OBJECT) { | |
| assert(_signature[sig_idx + 1] == T_LONG, "expected offset after oop"); | |
| VMStorage reg_oop = java_regs.at(reg_idx++); | |
| VMStorage reg_offset = java_regs.at(reg_idx++); | |
| sig_idx++; // skip offset | |
| pd_add_offset_to_oop(reg_oop, reg_offset, tmp1, tmp2); | |
| } else if (_signature[sig_idx] != T_VOID) { | |
| reg_idx++; | |
| } | |
| } | |
| } |