libgo: adjust sysinfo scripts for changed -fdump-go-spec

The -fdump-go-spec flag to GCC recently changed to be more fastidious
about handling incomplete types. This caused some breakage in
mk[r]sysinfo.sh on Solaris. This commit adjusts for the new behavior.
Specifically:

  * Types that refer to _in6_addr may be hidden behind a typedef and can
    no longer be filtered out with `grep -v in6_addr`. Instead just
    rewrite the definition of _in6_addr to [16]byte wherever it appears.

  * timestruc_t is now (correctly) emitted as an alias for timespec, so this
    case is handled specially.

  * stdio.h is included in sysinfo.c to avoid emitting an incomplete
    definition of the FILE type.

  * Dummy definitions for _u?pad128_t are now emitted automatically,
    which conflict with the definitions installed by mk[r]sysinfo.sh.
    These definitions were actually dead code, so just remove them.

Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/278672

3 files changed, 21 insertions, 91 deletions

diff --git a/libgo/mkrsysinfo.sh b/libgo/mkrsysinfo.sh
index e016ca4dc59..18643370645 100755
--- a/libgo/mkrsysinfo.sh
+++ b/libgo/mkrsysinfo.sh
@@ -24,12 +24,19 @@ grep -v '^// ' gen-sysinfo.go | \
   grep -v '^type _timespec ' | \
   grep -v '^type _epoll_' | \
   grep -v '^type _*locale[_ ]' | \
-  grep -v 'in6_addr' | \
+  grep -v '^type _in6_addr' | \
   grep -v 'sockaddr_in6' | \
   egrep -v '^const _*FLT(64|128)_(NORM_)?MAX' | \
   sed -e 's/\([^a-zA-Z0-9_]\)_timeval\([^a-zA-Z0-9_]\)/\1timeval\2/g' \
+      -e 's/\([^a-zA-Z0-9_]\)_timeval$/\1timeval/g' \
       -e 's/\([^a-zA-Z0-9_]\)_timespec_t\([^a-zA-Z0-9_]\)/\1timespec\2/g' \
+      -e 's/\([^a-zA-Z0-9_]\)_timespec_t$/\1timespec_t/g' \
       -e 's/\([^a-zA-Z0-9_]\)_timespec\([^a-zA-Z0-9_]\)/\1timespec\2/g' \
+      -e 's/\([^a-zA-Z0-9_]\)_timespec$/\1timespec/g' \
+      -e 's/\([^a-zA-Z0-9_]\)_in6_addr\([^a-zA-Z0-9_]\)/\1[16]byte\2/g' \
+      -e 's/\([^a-zA-Z0-9_]\)_in6_addr$/\1[16]byte/g' \
+      -e 's/\([^a-zA-Z0-9_]\)_in6_addr_t\([^a-zA-Z0-9_]\)/\1[16]byte\2/g' \
+      -e 's/\([^a-zA-Z0-9_]\)_in6_addr_t$/\1[16]byte/g' \
     >> ${OUT}
 
 # The C long type, needed because that is the type that ptrace returns.
@@ -45,16 +52,6 @@ else
   exit 1
 fi
 
-# On AIX, the _arpcom struct, is filtered by the above grep sequence, as it as
-# a field of type _in6_addr, but other types depend on _arpcom, so we need to
-# put it back.
-grep '^type _arpcom ' gen-sysinfo.go | \
-  sed -e 's/_in6_addr/[16]byte/' >> ${OUT}
-
-# Same on Solaris for _mld_hdr_t.
-grep '^type _mld_hdr_t ' gen-sysinfo.go | \
-  sed -e 's/_in6_addr/[16]byte/' >> ${OUT}
-
 # The time structures need special handling: we need to name the
 # types, so that we can cast integers to the right types when
 # assigning to the structures.
@@ -166,40 +163,6 @@ fi
 grep '^type _sem_t ' gen-sysinfo.go | \
     sed -e 's/_sem_t/semt/' >> ${OUT}
 
-# Solaris 2 needs _u?pad128_t, but its default definition in terms of long
-# double is commented by -fdump-go-spec.
-if grep "^// type _pad128_t" gen-sysinfo.go > /dev/null 2>&1; then
-  echo "type _pad128_t struct { _l [4]int32; }" >> ${OUT}
-fi
-if grep "^// type _upad128_t" gen-sysinfo.go > /dev/null 2>&1; then
-  echo "type _upad128_t struct { _l [4]uint32; }" >> ${OUT}
-fi
-
-# The Solaris 11 Update 1 _zone_net_addr_t struct.
-grep '^type _zone_net_addr_t ' gen-sysinfo.go | \
-    sed -e 's/_in6_addr/[16]byte/' \
-    >> ${OUT}
-
-# The Solaris 11.4 _flow_arp_desc_t struct.
-grep '^type _flow_arp_desc_t ' gen-sysinfo.go | \
-    sed -e 's/_in6_addr_t/[16]byte/g' \
-    >> ${OUT}
-
-# The Solaris 11.4 _flow_l3_desc_t struct.
-grep '^type _flow_l3_desc_t ' gen-sysinfo.go | \
-    sed -e 's/_in6_addr_t/[16]byte/g' \
-    >> ${OUT}
-
-# The Solaris 11.3 _mac_ipaddr_t struct.
-grep '^type _mac_ipaddr_t ' gen-sysinfo.go | \
-    sed -e 's/_in6_addr_t/[16]byte/g' \
-    >> ${OUT}
-
-# The Solaris 11.3 _mactun_info_t struct.
-grep '^type _mactun_info_t ' gen-sysinfo.go | \
-    sed -e 's/_in6_addr_t/[16]byte/g' \
-    >> ${OUT}
-
 # The Solaris port_event_t struct.
 grep '^type _port_event_t ' gen-sysinfo.go | \
     sed -e s'/_port_event_t/portevent/' \
diff --git a/libgo/mksysinfo.sh b/libgo/mksysinfo.sh
index 24d4ce2df6b..0c52ea5d71a 100755
--- a/libgo/mksysinfo.sh
+++ b/libgo/mksysinfo.sh
@@ -36,25 +36,23 @@ grep -v '^// ' gen-sysinfo.go | \
   grep -v '^type _timestruc_t ' | \
   grep -v '^type _epoll_' | \
   grep -v '^type _*locale[_ ]' | \
-  grep -v 'in6_addr' | \
+  grep -v '^type _in6_addr' | \
   grep -v 'sockaddr_in6' | \
   egrep -v '^const _*FLT(64|128)_(NORM_)?MAX' | \
   sed -e 's/\([^a-zA-Z0-9_]\)_timeval\([^a-zA-Z0-9_]\)/\1Timeval\2/g' \
+      -e 's/\([^a-zA-Z0-9_]\)_timeval$/\1Timeval/g' \
       -e 's/\([^a-zA-Z0-9_]\)_timespec_t\([^a-zA-Z0-9_]\)/\1Timespec\2/g' \
+      -e 's/\([^a-zA-Z0-9_]\)_timespec_t$/\1Timespec/g' \
       -e 's/\([^a-zA-Z0-9_]\)_timespec\([^a-zA-Z0-9_]\)/\1Timespec\2/g' \
+      -e 's/\([^a-zA-Z0-9_]\)_timespec$/\1Timespec/g' \
       -e 's/\([^a-zA-Z0-9_]\)_timestruc_t\([^a-zA-Z0-9_]\)/\1Timestruc\2/g' \
+      -e 's/\([^a-zA-Z0-9_]\)_timestruc_t$/\1Timestruc/g' \
+      -e 's/\([^a-zA-Z0-9_]\)_in6_addr\([^a-zA-Z0-9_]\)/\1[16]byte\2/g' \
+      -e 's/\([^a-zA-Z0-9_]\)_in6_addr$/\1[16]byte/g' \
+      -e 's/\([^a-zA-Z0-9_]\)_in6_addr_t\([^a-zA-Z0-9_]\)/\1[16]byte\2/g' \
+      -e 's/\([^a-zA-Z0-9_]\)_in6_addr_t$/\1[16]byte/g' \
     >> ${OUT}
 
-# On AIX, the _arpcom struct, is filtered by the above grep sequence, as it as
-# a field of type _in6_addr, but other types depend on _arpcom, so we need to
-# put it back.
-grep '^type _arpcom ' gen-sysinfo.go | \
-  sed -e 's/_in6_addr/[16]byte/' >> ${OUT}
-
-# Same on Solaris for _mld_hdr_t.
-grep '^type _mld_hdr_t ' gen-sysinfo.go | \
-  sed -e 's/_in6_addr/[16]byte/' >> ${OUT}
-
 # The errno constants.  These get type Errno.
 egrep '#define E[A-Z0-9_]+ [0-9E]' errno.i | \
   sed -e 's/^#define \(E[A-Z0-9_]*\) .*$/const \1 = Errno(_\1)/' >> ${OUT}
@@ -442,15 +440,6 @@ else
   exit 1
 fi
 
-# Solaris 2 needs _u?pad128_t, but its default definition in terms of long
-# double is commented by -fdump-go-spec.
-if grep "^// type _pad128_t" gen-sysinfo.go > /dev/null 2>&1; then
-  echo "type _pad128_t struct { _l [4]int32; }" >> ${OUT}
-fi
-if grep "^// type _upad128_t" gen-sysinfo.go > /dev/null 2>&1; then
-  echo "type _upad128_t struct { _l [4]uint32; }" >> ${OUT}
-fi
-
 # The time_t type.
 if grep '^type _time_t ' gen-sysinfo.go > /dev/null 2>&1; then
   echo 'type Time_t _time_t' >> ${OUT}
@@ -484,7 +473,9 @@ echo $timespec | \
       -e 's/tv_nsec *[a-zA-Z0-9_]*/Nsec Timespec_nsec_t/' >> ${OUT}
 
 timestruc=`grep '^type _timestruc_t ' gen-sysinfo.go || true`
-if test "$timestruc" != ""; then
+if test "$timestruc" = "type _timestruc_t _timespec"; then
+  echo "type Timestruc Timespec" >> ${OUT}
+elif test "$timestruc" != ""; then
   timestruc_sec=`echo $timestruc | sed -n -e 's/^.*tv_sec \([^ ]*\);.*$/\1/p'`
   timestruc_nsec=`echo $timestruc | sed -n -e 's/^.*tv_nsec \([^ ]*\);.*$/\1/p'`
   echo "type Timestruc_sec_t = $timestruc_sec" >> ${OUT}
@@ -1524,31 +1515,6 @@ if ! grep 'const SizeofICMPv6Filter ' ${OUT} >/dev/null 2>&1; then
     echo 'const SizeofICMPv6Filter = 32' >> ${OUT}
 fi
 
-# The Solaris 11 Update 1 _zone_net_addr_t struct.
-grep '^type _zone_net_addr_t ' gen-sysinfo.go | \
-    sed -e 's/_in6_addr/[16]byte/' \
-    >> ${OUT}
-
-# The Solaris 11.4 _flow_arp_desc_t struct.
-grep '^type _flow_arp_desc_t ' gen-sysinfo.go | \
-    sed -e 's/_in6_addr_t/[16]byte/g' \
-    >> ${OUT}
-
-# The Solaris 11.4 _flow_l3_desc_t struct.
-grep '^type _flow_l3_desc_t ' gen-sysinfo.go | \
-    sed -e 's/_in6_addr_t/[16]byte/g' \
-    >> ${OUT}
-
-# The Solaris 11.3 _mac_ipaddr_t struct.
-grep '^type _mac_ipaddr_t ' gen-sysinfo.go | \
-    sed -e 's/_in6_addr_t/[16]byte/g' \
-    >> ${OUT}
-
-# The Solaris 11.3 _mactun_info_t struct.
-grep '^type _mactun_info_t ' gen-sysinfo.go | \
-    sed -e 's/_in6_addr_t/[16]byte/g' \
-    >> ${OUT}
-
 # Type 'uint128' is needed in a couple of type definitions on arm64,such
 # as _user_fpsimd_struct, _elf_fpregset_t, etc.
 if ! grep '^type uint128' ${OUT} > /dev/null 2>&1; then
diff --git a/libgo/sysinfo.c b/libgo/sysinfo.c
index a060ea867a5..8ce061e2f5f 100644
--- a/libgo/sysinfo.c
+++ b/libgo/sysinfo.c
@@ -11,6 +11,7 @@
 
 #include <stddef.h>
 #include <stdlib.h>
+#include <stdio.h>
 #include <sys/types.h>
 #include <dirent.h>
 #include <errno.h>