jdk

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/*
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 * Copyright (c) 2022, 2023, Oracle and/or its affiliates. All rights reserved.
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * This code is free software; you can redistribute it and/or modify it
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 * under the terms of the GNU General Public License version 2 only, as
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 * published by the Free Software Foundation.
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 *
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 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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 * version 2 for more details (a copy is included in the LICENSE file that
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 * accompanied this code).
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 *
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 * You should have received a copy of the GNU General Public License version
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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 *
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 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 * or visit www.oracle.com if you need additional information or have any
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 * questions.
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 */
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#include "precompiled.hpp"
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#include "downcallLinker.hpp"
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#include "gc/shared/gcLocker.inline.hpp"
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#include "runtime/interfaceSupport.inline.hpp"
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#include <cerrno>
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#ifdef _WIN64
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#include <Windows.h>
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#include <Winsock2.h>
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#endif
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// We call this from _thread_in_native, right after a downcall
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JVM_LEAF(void, DowncallLinker::capture_state(int32_t* value_ptr, int captured_state_mask))
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  // keep in synch with jdk.internal.foreign.abi.PreservableValues
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  enum PreservableValues {
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    NONE = 0,
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    GET_LAST_ERROR = 1,
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    WSA_GET_LAST_ERROR = 1 << 1,
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    ERRNO = 1 << 2
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  };
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#ifdef _WIN64
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  if (captured_state_mask & GET_LAST_ERROR) {
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    *value_ptr = GetLastError();
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  }
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  value_ptr++;
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  if (captured_state_mask & WSA_GET_LAST_ERROR) {
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    *value_ptr = WSAGetLastError();
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  }
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  value_ptr++;
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#endif
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  if (captured_state_mask & ERRNO) {
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    *value_ptr = errno;
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  }
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JVM_END
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void DowncallLinker::StubGenerator::add_offsets_to_oops(GrowableArray<VMStorage>& java_regs, VMStorage tmp1, VMStorage tmp2) const {
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  int reg_idx = 0;
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  for (int sig_idx = 0; sig_idx < _num_args; sig_idx++) {
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    if (_signature[sig_idx] == T_OBJECT) {
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      assert(_signature[sig_idx + 1] == T_LONG, "expected offset after oop");
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      VMStorage reg_oop = java_regs.at(reg_idx++);
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      VMStorage reg_offset = java_regs.at(reg_idx++);
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      sig_idx++; // skip offset
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      pd_add_offset_to_oop(reg_oop, reg_offset, tmp1, tmp2);
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    } else if (_signature[sig_idx] != T_VOID) {
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      reg_idx++;
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    }
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  }
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}
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