libgo/mkrsysinfo.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 runtime_sysinfo.go from gen-sysinfo.go and errno.i.
   8
   9 OUT=tmp-runtime_sysinfo.go
  10
  11 set -e
  12
  13 echo 'package runtime' > ${OUT}
  14
  15 # Get all the consts and types, skipping ones which could not be
  16 # represented in Go and ones which we need to rewrite.  We also skip
  17 # function declarations, as we don't need them here.  All the symbols
  18 # will all have a leading underscore.
  19 grep -v '^// ' gen-sysinfo.go | \
  20   grep -v '^func' | \
  21   grep -v '^var ' | \
  22   grep -v '^type _timeval ' | \
  23   grep -v '^type _timespec_t ' | \
  24   grep -v '^type _timespec ' | \
  25   grep -v '^type _epoll_' | \
  26   grep -v '^type _*locale[_ ]' | \
  27   grep -v '^type _in6_addr' | \
  28   grep -v 'sockaddr_in6' | \
  29   egrep -v '^const _*FLT(64|128)_(NORM_)?MAX' | \
  30   sed -e 's/\([^a-zA-Z0-9_]\)_timeval\([^a-zA-Z0-9_]\)/\1timeval\2/g' \
  31       -e 's/\([^a-zA-Z0-9_]\)_timeval$/\1timeval/g' \
  32       -e 's/\([^a-zA-Z0-9_]\)_timespec_t\([^a-zA-Z0-9_]\)/\1timespec\2/g' \
  33       -e 's/\([^a-zA-Z0-9_]\)_timespec_t$/\1timespec_t/g' \
  34       -e 's/\([^a-zA-Z0-9_]\)_timespec\([^a-zA-Z0-9_]\)/\1timespec\2/g' \
  35       -e 's/\([^a-zA-Z0-9_]\)_timespec$/\1timespec/g' \
  36       -e 's/\([^a-zA-Z0-9_]\)_in6_addr\([^a-zA-Z0-9_]\)/\1[16]byte\2/g' \
  37       -e 's/\([^a-zA-Z0-9_]\)_in6_addr$/\1[16]byte/g' \
  38       -e 's/\([^a-zA-Z0-9_]\)_in6_addr_t\([^a-zA-Z0-9_]\)/\1[16]byte\2/g' \
  39       -e 's/\([^a-zA-Z0-9_]\)_in6_addr_t$/\1[16]byte/g' \
  40     >> ${OUT}
  41
  42 # The C long type, needed because that is the type that ptrace returns.
  43 sizeof_long=`grep '^const ___SIZEOF_LONG__ = ' gen-sysinfo.go | sed -e 's/.*= //'`
  44 if test "$sizeof_long" = "4"; then
  45   echo "type _C_long int32" >> ${OUT}
  46   echo "type _C_ulong uint32" >> ${OUT}
  47 elif test "$sizeof_long" = "8"; then
  48   echo "type _C_long int64" >> ${OUT}
  49   echo "type _C_ulong uint64" >> ${OUT}
  50 else
  51   echo 1>&2 "mkrsysinfo.sh: could not determine size of long (got $sizeof_long)"
  52   exit 1
  53 fi
  54
  55 # The time structures need special handling: we need to name the
  56 # types, so that we can cast integers to the right types when
  57 # assigning to the structures.
  58 timeval=`grep '^type _timeval ' gen-sysinfo.go`
  59 timeval_sec=`echo $timeval | sed -n -e 's/^.*tv_sec \([^ ]*\);.*$/\1/p'`
  60 timeval_usec=`echo $timeval | sed -n -e 's/^.*tv_usec \([^ ]*\);.*$/\1/p'`
  61 echo "type timeval_sec_t $timeval_sec" >> ${OUT}
  62 echo "type timeval_usec_t $timeval_usec" >> ${OUT}
  63 echo $timeval | \
  64   sed -e 's/type _timeval /type timeval /' \
  65       -e 's/tv_sec *[a-zA-Z0-9_]*/tv_sec timeval_sec_t/' \
  66       -e 's/tv_usec *[a-zA-Z0-9_]*/tv_usec timeval_usec_t/' >> ${OUT}
  67 echo >> ${OUT}
  68 echo "func (tv *timeval) set_usec(x int32) {" >> ${OUT}
  69 echo "  tv.tv_usec = timeval_usec_t(x)" >> ${OUT}
  70 echo "}" >> ${OUT}
  71
  72 timespec=`grep '^type _timespec ' gen-sysinfo.go || true`
  73 if test "$timespec" = ""; then
  74   # IRIX 6.5 has __timespec instead.
  75   timespec=`grep '^type ___timespec ' gen-sysinfo.go || true`
  76 fi
  77 timespec_sec=`echo $timespec | sed -n -e 's/^.*tv_sec \([^ ]*\);.*$/\1/p'`
  78 timespec_nsec=`echo $timespec | sed -n -e 's/^.*tv_nsec \([^ ]*\);.*$/\1/p'`
  79 echo "type timespec_sec_t $timespec_sec" >> ${OUT}
  80 echo "type timespec_nsec_t $timespec_nsec" >> ${OUT}
  81 echo $timespec | \
  82   sed -e 's/^type ___timespec /type timespec /' \
  83       -e 's/^type _timespec /type timespec /' \
  84       -e 's/tv_sec *[a-zA-Z0-9_]*/tv_sec timespec_sec_t/' \
  85       -e 's/tv_nsec *[a-zA-Z0-9_]*/tv_nsec timespec_nsec_t/' >> ${OUT}
  86 echo >> ${OUT}
  87 echo "func (ts *timespec) setNsec(ns int64) {" >> ${OUT}
  88 echo "  ts.tv_sec = timespec_sec_t(ns / 1e9)" >> ${OUT}
  89 echo "  ts.tv_nsec = timespec_nsec_t(ns % 1e9)" >> ${OUT}
  90 echo "}" >> ${OUT}
  91 echo >> ${OUT}
  92
  93 # Define the epollevent struct.  This needs special attention because
  94 # the C definition uses a union and is sometimes packed.
  95 if grep '^const _epoll_data_offset ' ${OUT} >/dev/null 2>&1; then
  96   val=`grep '^const _epoll_data_offset ' ${OUT} | sed -e 's/const _epoll_data_offset = \(.*\)$/\1/'`
  97   if test "$val" = "4"; then
  98       echo 'type epollevent struct { events uint32; data [8]byte }' >> ${OUT}
  99   elif test "$val" = "8"; then
 100       if test "$GOARCH" = "sparc64" -a "$GOOS" = "linux"; then
 101           echo 'type epollevent struct { events uint32; pad [4]byte; data [8]byte; _ [0]int64 }' >> ${OUT}
 102       else
 103           echo 'type epollevent struct { events uint32; pad [4]byte; data [8]byte }' >> ${OUT}
 104       fi
 105   else
 106       echo 1>&2 "unknown epoll data offset value ${val}"
 107       exit 1
 108   fi
 109 fi
 110 # Make sure EPOLLET is positive.
 111 if grep '^const _EPOLLET = [0-9]' gen-sysinfo.go > /dev/null 2>&1; then
 112   echo "const _EPOLLETpos = _EPOLLET" >> ${OUT}
 113 else
 114   echo "const _EPOLLETpos = 0x80000000" >> ${OUT}
 115 fi
 116 # Make sure EPOLLRDHUP and EPOLL_CLOEXEC are defined.
 117 if ! grep '^const _EPOLLRDHUP' ${OUT} >/dev/null 2>&1; then
 118   echo "const _EPOLLRDHUP = 0x2000" >> ${OUT}
 119 fi
 120 if ! grep '^const _EPOLL_CLOEXEC' ${OUT} >/dev/null 2>&1; then
 121   echo "const _EPOLL_CLOEXEC = 02000000" >> ${OUT}
 122 fi
 123
 124 # AIX 7.1 is a 64 bits value for _FCLOEXEC (referenced by O_CLOEXEC)
 125 # which leads to a constant overflow when using O_CLOEXEC in some
 126 # go code. Issue wan not present in 6.1 (no O_CLOEXEC) and is no
 127 # more present in 7.2 (_FCLOEXEC is a 32 bit value).
 128 if test "${GOOS}" = "aix" && `oslevel | grep -q "^7.1"`; then
 129     sed -e 's/const __FCLOEXEC = .*/const __FCLOEXEC = 0/' ${OUT} > ${OUT}-2
 130     mv ${OUT}-2 ${OUT}
 131 fi
 132
 133 # Make sure _MAP_FAILED is defined.
 134 if ! grep '^const _MAP_FAILED =' gen-sysinfo.go > /dev/null 2>&1; then
 135   echo "const _MAP_FAILED = ^uintptr(0)" >> ${OUT}
 136 fi
 137 # Make sure _MAP_ANON is defined.
 138 if ! grep '^const _MAP_ANON =' gen-sysinfo.go > /dev/null 2>&1; then
 139   if grep '^const _MAP_ANONYMOUS ' gen-sysinfo.go > /dev/null 2>&1; then
 140     echo "const _MAP_ANON = _MAP_ANONYMOUS" >> ${OUT}
 141   else
 142     echo "const _MAP_ANON = 0" >> ${OUT}
 143   fi
 144 fi
 145 # Make sure _MADV_DONTNEED is defined.
 146 if ! grep '^const _MADV_DONTNEED =' gen-sysinfo.go > /dev/null 2>&1; then
 147   echo "const _MADV_DONTNEED = 0" >> ${OUT}
 148 fi
 149 # Make sure _MADV_FREE is defined.
 150 if ! grep '^const _MADV_FREE =' gen-sysinfo.go > /dev/null 2>&1; then
 151   echo "const _MADV_FREE = 0" >> ${OUT}
 152 fi
 153 # Make sure _MADV_HUGEPAGE is defined.
 154 if ! grep '^const _MADV_HUGEPAGE =' gen-sysinfo.go > /dev/null 2>&1; then
 155   echo "const _MADV_HUGEPAGE = 0" >> ${OUT}
 156 fi
 157 # Make sure _MADV_NOHUGEPAGE is defined.
 158 if ! grep '^const _MADV_NOHUGEPAGE =' gen-sysinfo.go > /dev/null 2>&1; then
 159   echo "const _MADV_NOHUGEPAGE = 0" >> ${OUT}
 160 fi
 161
 162 # The semt structure, for Solaris.
 163 grep '^type _sem_t ' gen-sysinfo.go | \
 164     sed -e 's/_sem_t/semt/' >> ${OUT}
 165
 166 # The Solaris port_event_t struct.
 167 grep '^type _port_event_t ' gen-sysinfo.go | \
 168     sed -e s'/_port_event_t/portevent/' \
 169     >> ${OUT}
 170
 171 # The *BSD kevent struct.
 172 grep '^type _kevent ' gen-sysinfo.go | \
 173     sed -e s'/_kevent/keventt/' \
 174       -e 's/ udata [^;}]*/ udata *byte/' \
 175     >> ${OUT}
 176
 177 # Type 'uint128' is needed in a couple of type definitions on arm64,such
 178 # as _user_fpsimd_struct, _elf_fpregset_t, etc.
 179 if ! grep '^type uint128' ${OUT} > /dev/null 2>&1; then
 180     echo "type uint128 [16]byte" >> ${OUT}
 181 fi