libgo/mksigtab.sh

   1 #!/bin/sh
   2
   3 # Copyright 2016 The Go Authors. All rights reserved.
   4 # Use of this source code is governed by a BSD-style
   5 # license that can be found in the LICENSE file.
   6
   7 # Create sigtab.go from gen-sysinfo.go.
   8
   9 # This shell scripts creates the sigtab.go file, which maps signals to
  10 # their dispositions.  We generate a file so that we can build a
  11 # composite literal that only refers to signals that are defined on
  12 # this system.
  13
  14 # This script simply writes to standard output.
  15
  16 set -e
  17
  18 echo '// Generated by mksigtab.sh.  Do not edit.'
  19 echo
  20 echo 'package runtime'
  21 echo
  22 echo 'var sigtable = [...]sigTabT{'
  23
  24 # Handle signals valid on all Unix systems.
  25
  26 echo '  0:          {0, "SIGNONE: no trap"},'
  27 echo '  _SIGHUP:    {_SigNotify + _SigKill, "SIGHUP: terminal line hangup"},'
  28 echo '  _SIGINT:    {_SigNotify + _SigKill, "SIGINT: interrupt"},'
  29 echo '  _SIGQUIT:   {_SigNotify + _SigThrow, "SIGQUIT: quit"},'
  30 echo '  _SIGILL:    {_SigThrow + _SigUnblock, "SIGILL: illegal instruction"},'
  31 echo '  _SIGTRAP:   {_SigThrow + _SigUnblock, "SIGTRAP: trace trap"},'
  32 echo '  _SIGABRT:   {_SigNotify + _SigThrow, "SIGABRT: abort"},'
  33 echo '  _SIGBUS:    {_SigPanic + _SigUnblock, "SIGBUS: bus error"},'
  34 echo '  _SIGFPE:    {_SigPanic + _SigUnblock, "SIGFPE: floating-point exception"},'
  35 echo '  _SIGKILL:   {0, "SIGKILL: kill"},'
  36 echo '  _SIGUSR1:   {_SigNotify, "SIGUSR1: user-defined signal 1"},'
  37 echo '  _SIGSEGV:   {_SigPanic + _SigUnblock, "SIGSEGV: segmentation violation"},'
  38 echo '  _SIGUSR2:   {_SigNotify, "SIGUSR2: user-defined signal 2"},'
  39 echo '  _SIGPIPE:   {_SigNotify, "SIGPIPE: write to broken pipe"},'
  40 echo '  _SIGALRM:   {_SigNotify, "SIGALRM: alarm clock"},'
  41 echo '  _SIGTERM:   {_SigNotify + _SigKill, "SIGTERM: termination"},'
  42 echo '  _SIGCHLD:   {_SigNotify + _SigUnblock, "SIGCHLD: child status has changed"},'
  43 echo '  _SIGCONT:   {_SigNotify + _SigDefault, "SIGCONT: continue"},'
  44 echo '  _SIGSTOP:   {0, "SIGSTOP: stop"},'
  45 echo '  _SIGTSTP:   {_SigNotify + _SigDefault, "SIGTSTP: keyboard stop"},'
  46 echo '  _SIGTTIN:   {_SigNotify + _SigDefault, "SIGTTIN: background read from tty"},'
  47 echo '  _SIGTTOU:   {_SigNotify + _SigDefault, "SIGTTOU: background write to tty"},'
  48 echo '  _SIGURG:    {_SigNotify, "SIGURG: urgent condition on socket"},'
  49 echo '  _SIGXCPU:   {_SigNotify, "SIGXCPU: cpu limit exceeded"},'
  50 echo '  _SIGXFSZ:   {_SigNotify, "SIGXFSZ: file size limit exceeded"},'
  51 echo '  _SIGVTALRM: {_SigNotify, "SIGVTALRM: virtual alarm clock"},'
  52 echo '  _SIGPROF:   {_SigNotify + _SigUnblock, "SIGPROF: profiling alarm clock"},'
  53 echo '  _SIGWINCH:  {_SigNotify, "SIGWINCH: window size change"},'
  54 echo '  _SIGSYS:    {_SigThrow, "SIGSYS: bad system call"},'
  55
  56 # Handle signals that are not supported on all systems.
  57
  58 checksig() {
  59     if grep "const $1 = " gen-sysinfo.go >/dev/null 2>&1 \
  60         && ! grep "const $1 = _SIG" gen-sysinfo.go > /dev/null 2>&1; then
  61         echo "  $1: $2,"
  62     fi
  63 }
  64
  65 checksig _SIGSTKFLT ' {_SigThrow + _SigUnblock, "SIGSTKFLT: stack fault"}'
  66 checksig _SIGIO '     {_SigNotify, "SIGIO: i/o now possible"}'
  67 checksig _SIGPWR '    {_SigNotify, "SIGPWR: power failure restart"}'
  68 checksig _SIGEMT '    {_SigThrow, "SIGEMT: emulate instruction executed"}'
  69 checksig _SIGINFO '   {_SigNotify, "SIGINFO: status request from keyboard"}'
  70 checksig _SIGTHR '    {_SigNotify, "SIGTHR: reserved"}'
  71 checksig _SIGPOLL '   {_SigNotify, "SIGPOLL: pollable event occurred"}'
  72 checksig _SIGWAITING '{_SigNotify, "SIGWAITING: reserved signal no longer used by"}'
  73 checksig _SIGLWP '    {_SigNotify, "SIGLWP: reserved signal no longer used by"}'
  74 checksig _SIGFREEZE ' {_SigNotify, "SIGFREEZE: special signal used by CPR"}'
  75 checksig _SIGTHAW '   {_SigNotify, "SIGTHAW: special signal used by CPR"}'
  76 checksig _SIGCANCEL ' {_SigSetStack + _SigUnblock, "SIGCANCEL: reserved signal for thread cancellation"}'
  77 checksig _SIGXRES '   {_SigNotify, "SIGXRES: resource control exceeded"}'
  78 checksig _SIGJVM1 '   {_SigNotify, "SIGJVM1: reserved signal for Java Virtual Machine"}'
  79 checksig _SIGJVM2 '   {_SigNotify, "SIGJVM2: reserved signal for Java Virtual Machine"}'
  80
  81 # Special handling of signals 32 and 33 on GNU/Linux systems,
  82 # because they are special to glibc.
  83 if test "${GOOS}" = "linux"; then
  84     echo '      32: {_SigSetStack + _SigUnblock, "signal 32"}, /* SIGCANCEL; see issue 6997 */'
  85     echo '      33: {_SigSetStack + _SigUnblock, "signal 33"}, /* SIGSETXID; see issues 3871, 9400, 12498 */'
  86 fi
  87
  88 nsig=`grep 'const _*NSIG = [0-9]*$' gen-sysinfo.go | sed -e 's/.* = \([0-9]*\)/\1/'`
  89 i=1
  90 while test "$i" -lt "$nsig"; do
  91     if ! grep "const _SIG.* = $i" gen-sysinfo.go >/dev/null 2>&1; then
  92         if test "${GOOS}" != "linux" || test "$i" -ne 32 -a "$i" -ne 33; then
  93             echo "      $i: {_SigNotify, \"signal $i\"},"
  94         fi
  95     fi
  96     i=`expr "$i" + 1`
  97 done
  98
  99 echo '}'