1 /*
2 * Copyright (c) 1999, 2017, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
86
87 // For Analyzer Forte AsyncGetCallTrace profiling support:
88 //
89 // This interface should be declared in os_bsd_i486.hpp, but
90 // that file provides extensions to the os class and not the
91 // Bsd class.
92 static ExtendedPC fetch_frame_from_ucontext(Thread* thread, const ucontext_t* uc,
93 intptr_t** ret_sp, intptr_t** ret_fp);
94
95 static bool get_frame_at_stack_banging_point(JavaThread* thread, ucontext_t* uc, frame* fr);
96
97 // This boolean allows users to forward their own non-matching signals
98 // to JVM_handle_bsd_signal, harmlessly.
99 static bool signal_handlers_are_installed;
100
101 static int get_our_sigflags(int);
102 static void set_our_sigflags(int, int);
103 static void signal_sets_init();
104 static void install_signal_handlers();
105 static void set_signal_handler(int, bool);
106 static bool is_sig_ignored(int sig);
107
108 static sigset_t* unblocked_signals();
109 static sigset_t* vm_signals();
110
111 // For signal-chaining
112 static struct sigaction *get_chained_signal_action(int sig);
113 static bool chained_handler(int sig, siginfo_t* siginfo, void* context);
114
115 // Real-time clock functions
116 static void clock_init(void);
117
118 // Stack repair handling
119
120 // none present
121
122 private:
123 typedef int (*sched_getcpu_func_t)(void);
124 typedef int (*numa_node_to_cpus_func_t)(int node, unsigned long *buffer, int bufferlen);
125 typedef int (*numa_max_node_func_t)(void);
126 typedef int (*numa_available_func_t)(void);
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1 /*
2 * Copyright (c) 1999, 2018, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
86
87 // For Analyzer Forte AsyncGetCallTrace profiling support:
88 //
89 // This interface should be declared in os_bsd_i486.hpp, but
90 // that file provides extensions to the os class and not the
91 // Bsd class.
92 static ExtendedPC fetch_frame_from_ucontext(Thread* thread, const ucontext_t* uc,
93 intptr_t** ret_sp, intptr_t** ret_fp);
94
95 static bool get_frame_at_stack_banging_point(JavaThread* thread, ucontext_t* uc, frame* fr);
96
97 // This boolean allows users to forward their own non-matching signals
98 // to JVM_handle_bsd_signal, harmlessly.
99 static bool signal_handlers_are_installed;
100
101 static int get_our_sigflags(int);
102 static void set_our_sigflags(int, int);
103 static void signal_sets_init();
104 static void install_signal_handlers();
105 static void set_signal_handler(int, bool);
106
107 static sigset_t* unblocked_signals();
108 static sigset_t* vm_signals();
109
110 // For signal-chaining
111 static struct sigaction *get_chained_signal_action(int sig);
112 static bool chained_handler(int sig, siginfo_t* siginfo, void* context);
113
114 // Real-time clock functions
115 static void clock_init(void);
116
117 // Stack repair handling
118
119 // none present
120
121 private:
122 typedef int (*sched_getcpu_func_t)(void);
123 typedef int (*numa_node_to_cpus_func_t)(int node, unsigned long *buffer, int bufferlen);
124 typedef int (*numa_max_node_func_t)(void);
125 typedef int (*numa_available_func_t)(void);
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