russell@unturf.com
0a580b313d
Authors: russell@unturf.com · brackishbert@gmail.com · foxhop.net · TimeHexOn.com Patches, unit tests, benchmarks, whitepaper, and outreach briefs. Public domain — no copyright claimed. Use freely.
79 lines
3 KiB
C
79 lines
3 KiB
C
/*
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* Copyright (c) 2025, 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 <errno.h>
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#include "jvmti.h"
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#include <signal.h>
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#include <stdio.h>
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#include <unistd.h>
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static const struct { int sig; const char* name; } signals[] = {
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{ SIGABRT, "SIGABRT" }, { SIGALRM, "SIGALRM" }, { SIGBUS, "SIGBUS" }, { SIGCHLD, "SIGCHLD" }, { SIGCONT, "SIGCONT" },
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{ SIGFPE, "SIGFPE" }, { SIGHUP, "SIGHUP" }, { SIGILL, "SIGILL" }, { SIGINT, "SIGINT" }, { SIGKILL, "SIGKILL" },
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{ SIGPIPE, "SIGPIPE" }, { SIGQUIT, "SIGQUIT" }, { SIGSEGV, "SIGSEGV" }, { SIGSTOP, "SIGSTOP" }, { SIGTERM, "SIGTERM" },
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{ SIGTSTP, "SIGTSTP" }, { SIGTTIN, "SIGTTIN" }, { SIGTTOU, "SIGTTOU" }, { SIGUSR1, "SIGUSR1" }, { SIGUSR2, "SIGUSR2" },
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#ifdef SIGPOLL
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{ SIGPOLL, "SIGPOLL" },
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#endif
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{ SIGPROF, "SIGPROF" }, { SIGSYS, "SIGSYS" }, { SIGTRAP, "SIGTRAP" }, { SIGURG, "SIGURG" }, { SIGVTALRM, "SIGVTALRM" },
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{ SIGXCPU, "SIGXCPU" }, { SIGXFSZ, "SIGXFSZ" }, { -1, NULL }
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};
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int main(int argc, char** argv) {
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printf("PID: %d\n", getpid());
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sigset_t current_mask;
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sigemptyset(¤t_mask);
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if (sigprocmask(SIG_BLOCK /* ignored */, NULL, ¤t_mask) != 0) {
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printf("sigprocmask %d\n", errno);
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return -1;
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}
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for (int n = 0; signals[n].sig != -1; n++) {
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printf("%s: ", signals[n].name);
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if (sigismember(¤t_mask, signals[n].sig)) {
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printf("blocked ");
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}
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struct sigaction act;
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if (sigaction(signals[n].sig, NULL, &act) != 0) {
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printf("sigaction %d\n", errno);
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printf("\n");
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continue;
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}
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const void* const handler = (act.sa_flags & SA_SIGINFO ?
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(void*)act.sa_sigaction : (void*)act.sa_handler);
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if (handler == (void*)SIG_DFL) {
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printf("default ");
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} else if (handler == (void*)SIG_IGN) {
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printf("ignore ");
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} else if (handler == (void*)SIG_HOLD) {
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printf("hold ");
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} else {
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printf("%p ", handler);
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}
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printf("%X\n", act.sa_flags);
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}
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return 0;
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}
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