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#!/bin/sh
# SPDX-License-Identifier: BSD-3-Clause
# Copyright(c) 2018 Neil Horman <nhorman@tuxdriver.com>
build_map_changes()
{
local fname="$1"
local mapdb="$2"
cat "$fname" | awk '
# Initialize our variables
BEGIN {map="";sym="";ar="";sec=""; in_sec=0; in_map=0}
# Anything that starts with + or -, followed by an a
# and ends in the string .map is the name of our map file
# This may appear multiple times in a patch if multiple
# map files are altered, and all section/symbol names
# appearing between a triggering of this rule and the
# next trigger of this rule are associated with this file
/[-+] a\/.*\.map/ {map=$2; in_map=1}
# Same pattern as above, only it matches on anything that
# does not end in 'map', indicating we have left the map chunk.
# When we hit this, turn off the in_map variable, which
# supresses the subordonate rules below
/[-+] a\/.*\.^(map)/ {in_map=0}
# Triggering this rule, which starts a line with a + and ends it
# with a { identifies a versioned section. The section name is
# the rest of the line with the + and { symbols remvoed.
# Triggering this rule sets in_sec to 1, which actives the
# symbol rule below
/+.*{/ {gsub("+","");
if (in_map == 1) {
sec=$1; in_sec=1;
}
}
# This rule idenfies the end of a section, and disables the
# symbol rule
/.*}/ {in_sec=0}
# This rule matches on a + followed by any characters except a :
# (which denotes a global vs local segment), and ends with a ;.
# The semicolon is removed and the symbol is printed with its
# association file name and version section, along with an
# indicator that the symbol is a new addition. Note this rule
# only works if we have found a version section in the rule
# above (hence the in_sec check) And found a map file (the
# in_map check). If we are not in a map chunk, do nothing. If
# we are in a map chunk but not a section chunk, record it as
# unknown.
/^+[^}].*[^:*];/ {gsub(";","");sym=$2;
if (in_map == 1) {
if (in_sec == 1) {
print map " " sym " " sec " add"
} else {
print map " " sym " unknown add"
}
}
}
# This is the same rule as above, but the rule matches on a
# leading - rather than a +, denoting that the symbol is being
# removed.
/^-[^}].*[^:*];/ {gsub(";","");sym=$2;
if (in_map == 1) {
if (in_sec == 1) {
print map " " sym " " sec " del"
} else {
print map " " sym " unknown del"
}
}
}' > "$mapdb"
sort -u "$mapdb" > "$mapdb.2"
mv -f "$mapdb.2" "$mapdb"
}
check_for_rule_violations()
{
local mapdb="$1"
local mname
local symname
local secname
local ar
local ret=0
while read mname symname secname ar
do
if [ "$ar" = "add" ]
then
if [ "$secname" = "unknown" ]
then
# Just inform the user of this occurrence, but
# don't flag it as an error
echo -n "INFO: symbol $syname is added but "
echo -n "patch has insuficient context "
echo -n "to determine the section name "
echo -n "please ensure the version is "
echo "EXPERIMENTAL"
continue
fi
if [ "$secname" != "EXPERIMENTAL" ]
then
# Symbols that are getting added in a section
# other than the experimental section
# to be moving from an already supported
# section or its a violation
grep -q \
"$mname $symname [^EXPERIMENTAL] del" "$mapdb"
if [ $? -ne 0 ]
then
echo -n "ERROR: symbol $symname "
echo -n "is added in a section "
echo -n "other than the EXPERIMENTAL "
echo "section of the version map"
ret=1
fi
fi
else
if [ "$secname" != "EXPERIMENTAL" ]
then
# Just inform users that non-experimenal
# symbols need to go through a deprecation
# process
echo -n "INFO: symbol $symname is being "
echo -n "removed, ensure that it has "
echo "gone through the deprecation process"
fi
fi
done < "$mapdb"
return $ret
}
trap clean_and_exit_on_sig EXIT
mapfile=`mktemp mapdb.XXXXXX`
patch=$1
exit_code=1
clean_and_exit_on_sig()
{
rm -f "$mapfile"
exit $exit_code
}
build_map_changes "$patch" "$mapfile"
check_for_rule_violations "$mapfile"
exit_code=$?
rm -f "$mapfile"
exit $exit_code
|
