146 lines
6.5 KiB
Bash
146 lines
6.5 KiB
Bash
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#!/bin/sh
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# Copyright 2016 The Go Authors. All rights reserved.
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# Use of this source code is governed by a BSD-style
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# license that can be found in the LICENSE file.
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# Create sigtab.go from gen-sysinfo.go.
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# This shell scripts creates the sigtab.go file, which maps signals to
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# their dispositions. We generate a file so that we can build a
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# composite literal that only refers to signals that are defined on
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# this system.
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# This script simply writes to standard output.
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set -e
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echo '// Generated by mksigtab.sh. Do not edit.'
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echo
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echo 'package runtime'
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echo
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echo 'var sigtable = [...]sigTabT{'
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SIGLIST=""
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# Handle signals valid on all Unix systems.
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addsig() {
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# Get the signal number and add it to SIGLIST
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signum=`grep "const $1 = " gen-sysinfo.go | sed -e 's/.* = //'`
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if echo "$signum" | grep '^_SIG[A-Z0-9_]*$' >/dev/null 2>&1; then
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# Recurse once to obtain signal number
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# This is needed for some MIPS signals defined as aliases of other signals
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signum=`grep "const $signum = " gen-sysinfo.go | sed -e 's/.* = //'`
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fi
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# Only add signal if the signal number isn't in the list yet.
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# For example, musl libc uses signal 29 for both SIGIO and SIGPOLL.
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if ! echo "$SIGLIST" | grep "_${signum}_" >/dev/null 2>&1; then
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echo " $1: $2,"
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SIGLIST=$SIGLIST"_${signum}_"
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fi
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}
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echo ' 0: {0, "SIGNONE: no trap"},'
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addsig _SIGHUP '{_SigNotify + _SigKill, "SIGHUP: terminal line hangup"}'
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addsig _SIGINT '{_SigNotify + _SigKill, "SIGINT: interrupt"}'
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addsig _SIGQUIT '{_SigNotify + _SigThrow, "SIGQUIT: quit"}'
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addsig _SIGILL '{_SigThrow + _SigUnblock, "SIGILL: illegal instruction"}'
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addsig _SIGTRAP '{_SigThrow + _SigUnblock, "SIGTRAP: trace trap"}'
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addsig _SIGABRT '{_SigNotify + _SigThrow, "SIGABRT: abort"}'
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addsig _SIGBUS '{_SigPanic + _SigUnblock, "SIGBUS: bus error"}'
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addsig _SIGFPE '{_SigPanic + _SigUnblock, "SIGFPE: floating-point exception"}'
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addsig _SIGKILL '{0, "SIGKILL: kill"}'
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addsig _SIGUSR1 '{_SigNotify, "SIGUSR1: user-defined signal 1"}'
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addsig _SIGSEGV '{_SigPanic + _SigUnblock, "SIGSEGV: segmentation violation"}'
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addsig _SIGUSR2 '{_SigNotify, "SIGUSR2: user-defined signal 2"}'
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addsig _SIGPIPE '{_SigNotify, "SIGPIPE: write to broken pipe"}'
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addsig _SIGALRM '{_SigNotify, "SIGALRM: alarm clock"}'
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addsig _SIGTERM '{_SigNotify + _SigKill, "SIGTERM: termination"}'
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addsig _SIGCHLD '{_SigNotify + _SigUnblock, "SIGCHLD: child status has changed"}'
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addsig _SIGCONT '{_SigNotify + _SigDefault, "SIGCONT: continue"}'
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addsig _SIGSTOP '{0, "SIGSTOP: stop"}'
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addsig _SIGTSTP '{_SigNotify + _SigDefault, "SIGTSTP: keyboard stop"}'
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addsig _SIGTTIN '{_SigNotify + _SigDefault, "SIGTTIN: background read from tty"}'
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addsig _SIGTTOU '{_SigNotify + _SigDefault, "SIGTTOU: background write to tty"}'
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addsig _SIGURG '{_SigNotify, "SIGURG: urgent condition on socket"}'
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addsig _SIGXCPU '{_SigNotify, "SIGXCPU: cpu limit exceeded"}'
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addsig _SIGXFSZ '{_SigNotify, "SIGXFSZ: file size limit exceeded"}'
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addsig _SIGVTALRM '{_SigNotify, "SIGVTALRM: virtual alarm clock"}'
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addsig _SIGPROF '{_SigNotify + _SigUnblock, "SIGPROF: profiling alarm clock"}'
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addsig _SIGWINCH '{_SigNotify, "SIGWINCH: window size change"}'
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addsig _SIGSYS '{_SigThrow, "SIGSYS: bad system call"}'
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# Handle signals that are not supported on all systems.
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checksig() {
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if grep "const $1 = " gen-sysinfo.go >/dev/null 2>&1 \
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&& ! grep "const $1 = _SIG" gen-sysinfo.go > /dev/null 2>&1; then
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addsig $1 "$2"
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fi
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}
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checksig _SIGSTKFLT '{_SigThrow + _SigUnblock, "SIGSTKFLT: stack fault"}'
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checksig _SIGIO '{_SigNotify, "SIGIO: i/o now possible"}'
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checksig _SIGPWR '{_SigNotify, "SIGPWR: power failure restart"}'
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checksig _SIGEMT '{_SigThrow, "SIGEMT: emulate instruction executed"}'
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checksig _SIGINFO '{_SigNotify, "SIGINFO: status request from keyboard"}'
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checksig _SIGTHR '{_SigNotify, "SIGTHR: reserved"}'
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checksig _SIGPOLL '{_SigNotify, "SIGPOLL: pollable event occurred"}'
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checksig _SIGWAITING '{_SigNotify, "SIGWAITING: reserved signal no longer used by"}'
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checksig _SIGLWP '{_SigNotify, "SIGLWP: reserved signal no longer used by"}'
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checksig _SIGFREEZE '{_SigNotify, "SIGFREEZE: special signal used by CPR"}'
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checksig _SIGTHAW '{_SigNotify, "SIGTHAW: special signal used by CPR"}'
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checksig _SIGCANCEL '{_SigSetStack + _SigUnblock, "SIGCANCEL: reserved signal for thread cancellation"}'
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checksig _SIGXRES '{_SigNotify, "SIGXRES: resource control exceeded"}'
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checksig _SIGJVM1 '{_SigNotify, "SIGJVM1: reserved signal for Java Virtual Machine"}'
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checksig _SIGJVM2 '{_SigNotify, "SIGJVM2: reserved signal for Java Virtual Machine"}'
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checksig _SIGLOST ' {_SigNotify, "SIGLOST: resource lost (Sun); server died (GNU)"}'
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# Special handling of signals 32 and 33 on GNU/Linux systems,
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# because they are special to glibc.
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# Signal 34 is additionally special to Linux systems with musl.
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if test "${GOOS}" = "linux"; then
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SIGLIST=$SIGLIST"_32__33__34_"
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echo ' 32: {_SigSetStack + _SigUnblock, "signal 32"}, /* SIGCANCEL; see issue 6997 */'
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echo ' 33: {_SigSetStack + _SigUnblock, "signal 33"}, /* SIGSETXID; see issues 3871, 9400, 12498 */'
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echo ' 34: {_SigSetStack + _SigUnblock, "signal 34"}, /* musl SIGSYNCCALL; see issue 39343 */'
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fi
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if test "${GOOS}" = "aix"; then
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# _NSIG = _NSIG32/_NSIG64 and _NSIG* = _SIGMAX* + 1
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bits=`grep 'const _NSIG = _NSIG[0-9]*$' gen-sysinfo.go | sed -e 's/.* = _NSIG\([0-9]*\)/\1/'`
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nsig=`grep "const _SIGMAX$bits = [0-9]*$" gen-sysinfo.go | sed -e 's/.* = \([0-9]*\)/\1/'`
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nsig=`expr $nsig + 1`
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else
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nsig=`grep 'const _*NSIG = [0-9]*$' gen-sysinfo.go | sed -e 's/.* = \([0-9]*\)/\1/'`
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if test -z "$nsig"; then
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if grep 'const _*NSIG = [ (]*_*SIGRTMAX + 1[ )]*' gen-sysinfo.go >/dev/null 2>&1; then
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rtmax=`grep 'const _*SIGRTMAX = [0-9]*$' gen-sysinfo.go | sed -e 's/.* = \([0-9]*\)/\1/'`
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if test -n "$rtmax"; then
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nsig=`expr $rtmax + 1`
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elif grep 'const _*SIGRTMAX = [ (]*_*SIGRTMIN[ )]*' gen-sysinfo.go >/dev/null 2>&1; then
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rtmin=`grep 'const _*SIGRTMIN = [0-9]*$' gen-sysinfo.go | sed -e 's/.* = \([0-9]*\)/\1/'`
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if test -n "$rtmin"; then
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nsig=`expr $rtmin + 1`
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fi
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fi
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fi
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fi
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fi
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if test -z "$nsig"; then
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echo 1>&2 "could not determine number of signals"
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exit 1
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fi
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i=1
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# Fill in the remaining signal numbers in sigtable
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while test "$i" -lt "$nsig"; do
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if ! echo $SIGLIST | grep "_${i}_" >/dev/null 2>&1; then
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echo " $i: {_SigNotify, \"signal $i\"},"
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fi
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i=`expr "$i" + 1`
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done
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echo '}'
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