b197d7f140
PR go/81617
libgo: change mksigtab to recognize glibc 2.26 NSIG expression
Fixes golang/go#21147
Fixes GCC PR 81617
Reviewed-on: https://go-review.googlesource.com/52611
From-SVN: r250872
114 lines
5.0 KiB
Bash
114 lines
5.0 KiB
Bash
#!/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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# Handle signals valid on all Unix systems.
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echo ' 0: {0, "SIGNONE: no trap"},'
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echo ' _SIGHUP: {_SigNotify + _SigKill, "SIGHUP: terminal line hangup"},'
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echo ' _SIGINT: {_SigNotify + _SigKill, "SIGINT: interrupt"},'
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echo ' _SIGQUIT: {_SigNotify + _SigThrow, "SIGQUIT: quit"},'
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echo ' _SIGILL: {_SigThrow + _SigUnblock, "SIGILL: illegal instruction"},'
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echo ' _SIGTRAP: {_SigThrow + _SigUnblock, "SIGTRAP: trace trap"},'
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echo ' _SIGABRT: {_SigNotify + _SigThrow, "SIGABRT: abort"},'
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echo ' _SIGBUS: {_SigPanic + _SigUnblock, "SIGBUS: bus error"},'
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echo ' _SIGFPE: {_SigPanic + _SigUnblock, "SIGFPE: floating-point exception"},'
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echo ' _SIGKILL: {0, "SIGKILL: kill"},'
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echo ' _SIGUSR1: {_SigNotify, "SIGUSR1: user-defined signal 1"},'
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echo ' _SIGSEGV: {_SigPanic + _SigUnblock, "SIGSEGV: segmentation violation"},'
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echo ' _SIGUSR2: {_SigNotify, "SIGUSR2: user-defined signal 2"},'
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echo ' _SIGPIPE: {_SigNotify, "SIGPIPE: write to broken pipe"},'
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echo ' _SIGALRM: {_SigNotify, "SIGALRM: alarm clock"},'
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echo ' _SIGTERM: {_SigNotify + _SigKill, "SIGTERM: termination"},'
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echo ' _SIGCHLD: {_SigNotify + _SigUnblock, "SIGCHLD: child status has changed"},'
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echo ' _SIGCONT: {_SigNotify + _SigDefault, "SIGCONT: continue"},'
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echo ' _SIGSTOP: {0, "SIGSTOP: stop"},'
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echo ' _SIGTSTP: {_SigNotify + _SigDefault, "SIGTSTP: keyboard stop"},'
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echo ' _SIGTTIN: {_SigNotify + _SigDefault, "SIGTTIN: background read from tty"},'
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echo ' _SIGTTOU: {_SigNotify + _SigDefault, "SIGTTOU: background write to tty"},'
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echo ' _SIGURG: {_SigNotify, "SIGURG: urgent condition on socket"},'
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echo ' _SIGXCPU: {_SigNotify, "SIGXCPU: cpu limit exceeded"},'
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echo ' _SIGXFSZ: {_SigNotify, "SIGXFSZ: file size limit exceeded"},'
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echo ' _SIGVTALRM: {_SigNotify, "SIGVTALRM: virtual alarm clock"},'
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echo ' _SIGPROF: {_SigNotify + _SigUnblock, "SIGPROF: profiling alarm clock"},'
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echo ' _SIGWINCH: {_SigNotify, "SIGWINCH: window size change"},'
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echo ' _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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echo " $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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# 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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if test "${GOOS}" = "linux"; then
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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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fi
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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 $rtmax + 1`
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fi
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fi
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fi
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if test -z "$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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while test "$i" -lt "$nsig"; do
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if ! grep "const _SIG.* = $i" gen-sysinfo.go >/dev/null 2>&1; then
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if test "${GOOS}" != "linux" || test "$i" -ne 32 -a "$i" -ne 33; then
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echo " $i: {_SigNotify, \"signal $i\"},"
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fi
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fi
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i=`expr "$i" + 1`
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done
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echo '}'
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