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76 lines
2.7 KiB
C++
76 lines
2.7 KiB
C++
/*
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* Copyright (c) 2020, 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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*/
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#ifndef OS_POSIX_SIGNALS_POSIX_HPP
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#define OS_POSIX_SIGNALS_POSIX_HPP
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#include "memory/allocation.hpp"
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#include "utilities/globalDefinitions.hpp"
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#include <signal.h>
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// Signal number used to suspend/resume a thread
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// do not use any signal number less than SIGSEGV, see 4355769
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static int SR_signum = SIGUSR2;
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class PosixSignals : public AllStatic {
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public:
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// The platform dependent parts of the central hotspot signal handler.
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// Returns true if the signal had been recognized and handled, false if not. If true, caller should
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// return from signal handling.
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static bool pd_hotspot_signal_handler(int sig, siginfo_t* info, ucontext_t* uc, JavaThread* thread);
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static void install_signal_handlers();
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static bool is_sig_ignored(int sig);
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static void signal_sets_init();
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static void hotspot_sigmask(Thread* thread);
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static void print_signal_handler(outputStream* st, int sig, char* buf, size_t buflen);
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static address ucontext_get_pc(const ucontext_t* ctx);
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// Set PC into context. Needed for continuation after signal.
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static void ucontext_set_pc(ucontext_t* ctx, address pc);
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// Suspend-resume
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static int SR_initialize();
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static bool do_suspend(OSThread* osthread);
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static void do_resume(OSThread* osthread);
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// For signal-chaining
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static bool chained_handler(int sig, siginfo_t* siginfo, void* context);
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// sun.misc.Signal support
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static void jdk_misc_signal_init();
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// Unblock all signals whose delivery cannot be deferred and which, if they happen
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// while delivery is blocked, would cause crashes or hangs (see JDK-8252533).
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static void unblock_error_signals();
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};
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#endif // OS_POSIX_SIGNALS_POSIX_HPP
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