gcc/gcc/opt-functions.awk
Martin Liska e88a93840b Validate that Init value is within range defined by IntegerRange.
2017-07-27  Martin Liska  <mliska@suse.cz>

	* opt-functions.awk: Add validation of value of Init.
	* optc-gen.awk: Pass new argument.

From-SVN: r250625
2017-07-27 12:58:07 +00:00

365 lines
11 KiB
Awk

# Copyright (C) 2003-2017 Free Software Foundation, Inc.
# Contributed by Kelley Cook, June 2004.
# Original code from Neil Booth, May 2003.
#
# This program is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by the
# Free Software Foundation; either version 3, or (at your option) any
# later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; see the file COPYING3. If not see
# <http://www.gnu.org/licenses/>.
# Some common subroutines for use by opt[ch]-gen.awk.
# Define some helpful character classes, for portability.
BEGIN {
lower = "abcdefghijklmnopqrstuvwxyz"
upper = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
digit = "0123456789"
alnum = lower "" upper "" digit
}
# Return nonzero if FLAGS contains a flag matching REGEX.
function flag_set_p(regex, flags)
{
# Ignore the arguments of flags with arguments.
gsub ("\\([^)]+\\)", "", flags);
return (" " flags " ") ~ (" " regex " ")
}
# Return STRING if FLAGS contains a flag matching regexp REGEX,
# otherwise return the empty string.
function test_flag(regex, flags, string)
{
if (flag_set_p(regex, flags))
return string
return ""
}
# Return a field initializer, with trailing comma, for a field that is
# 1 if FLAGS contains a flag matching REGEX and 0 otherwise.
function flag_init(regex, flags)
{
if (flag_set_p(regex, flags))
return "1 /* " regex " */, "
else
return "0, "
}
# If FLAGS contains a "NAME(...argument...)" flag, return the value
# of the argument. Return the empty string otherwise.
function opt_args(name, flags)
{
flags = " " flags
if (flags !~ " " name "\\(")
return ""
sub(".* " name "\\(", "", flags)
if (flags ~ "^[{]")
{
sub ("^[{]", "", flags)
sub ("}\\).*", "", flags)
}
else
sub("\\).*", "", flags)
return flags
}
# Return the Nth comma-separated element of S. Return the empty string
# if S does not contain N elements.
function nth_arg(n, s)
{
while (n-- > 0) {
if (s !~ ",")
return ""
sub("[^,]*, *", "", s)
}
sub(",.*", "", s)
return s
}
# Return a bitmask of CL_* values for option flags FLAGS.
function switch_flags (flags)
{
result = "0"
for (j = 0; j < n_langs; j++) {
regex = langs[j]
gsub ( "\\+", "\\+", regex )
result = result test_flag(regex, flags, " | " macros[j])
}
result = result \
test_flag("Common", flags, " | CL_COMMON") \
test_flag("Target", flags, " | CL_TARGET") \
test_flag("PchIgnore", flags, " | CL_PCH_IGNORE") \
test_flag("Driver", flags, " | CL_DRIVER") \
test_flag("Joined", flags, " | CL_JOINED") \
test_flag("JoinedOrMissing", flags, " | CL_JOINED") \
test_flag("Separate", flags, " | CL_SEPARATE") \
test_flag("Undocumented", flags, " | CL_UNDOCUMENTED") \
test_flag("NoDWARFRecord", flags, " | CL_NO_DWARF_RECORD") \
test_flag("Warning", flags, " | CL_WARNING") \
test_flag("(Optimization|PerFunction)", flags, " | CL_OPTIMIZATION")
sub( "^0 \\| ", "", result )
return result
}
# Return bit-field initializers for option flags FLAGS.
function switch_bit_fields (flags)
{
vn = var_name(flags);
if (host_wide_int[vn] == "yes")
hwi = "Host_Wide_Int"
else
hwi = ""
result = ""
sep_args = opt_args("Args", flags)
if (sep_args == "")
sep_args = 0
else
sep_args--
result = result sep_args ", "
result = result \
flag_init("SeparateAlias", flags) \
flag_init("NegativeAlias", flags) \
flag_init("NoDriverArg", flags) \
flag_init("RejectDriver", flags) \
flag_init("RejectNegative", flags) \
flag_init("JoinedOrMissing", flags) \
flag_init("UInteger", flags) \
flag_init("Host_Wide_Int", hwi) \
flag_init("ToLower", flags) \
flag_init("Report", flags)
sub(", $", "", result)
return result
}
# If FLAGS includes a Var flag, return the name of the variable it specifies.
# Return the empty string otherwise.
function var_name(flags)
{
return nth_arg(0, opt_args("Var", flags))
}
# Return the name of the variable if FLAGS has a HOST_WIDE_INT variable.
# Return the empty string otherwise.
function host_wide_int_var_name(flags)
{
split (flags, array, "[ \t]+")
if (array[1] == "HOST_WIDE_INT")
return array[2]
else
return ""
}
# Return true if the option described by FLAGS has a globally-visible state.
function global_state_p(flags)
{
return (var_name(flags) != "" \
|| opt_args("Mask", flags) != "" \
|| opt_args("InverseMask", flags) != "")
}
# Return true if the option described by FLAGS must have some state
# associated with it.
function needs_state_p(flags)
{
return (flag_set_p("Target", flags) \
&& !flag_set_p("Alias.*", flags) \
&& !flag_set_p("Ignore", flags))
}
# If FLAGS describes an option that needs state without a public
# variable name, return the name of that field, minus the initial
# "x_", otherwise return "". NAME is the name of the option.
function static_var(name, flags)
{
if (global_state_p(flags) || !needs_state_p(flags))
return ""
gsub ("[^" alnum "]", "_", name)
return "VAR_" name
}
# Return the type of variable that should be associated with the given flags.
function var_type(flags)
{
if (flag_set_p("Defer", flags))
return "void *"
else if (flag_set_p("Enum.*", flags)) {
en = opt_args("Enum", flags);
return enum_type[en] " "
}
else if (!flag_set_p("Joined.*", flags) && !flag_set_p("Separate", flags))
return "int "
else if (flag_set_p("UInteger", flags))
return "int "
else
return "const char *"
}
# Return the type of variable that should be associated with the given flags
# for use within a structure. Simple variables are changed to signed char
# type instead of int to save space.
function var_type_struct(flags)
{
if (flag_set_p("UInteger", flags))
return "int "
else if (flag_set_p("Enum.*", flags)) {
en = opt_args("Enum", flags);
return enum_type[en] " "
}
else if (!flag_set_p("Joined.*", flags) && !flag_set_p("Separate", flags)) {
if (flag_set_p(".*Mask.*", flags)) {
if (host_wide_int[var_name(flags)] == "yes")
return "HOST_WIDE_INT "
else
return "int "
}
else
return "signed char "
}
else
return "const char *"
}
# Given that an option has flags FLAGS, return an initializer for the
# "var_enum", "var_type" and "var_value" fields of its cl_options[] entry.
function var_set(flags)
{
if (flag_set_p("Defer", flags))
return "0, CLVC_DEFER, 0"
s = nth_arg(1, opt_args("Var", flags))
if (s != "")
return "0, CLVC_EQUAL, " s
s = opt_args("Mask", flags);
if (s != "") {
vn = var_name(flags);
if (vn)
return "0, CLVC_BIT_SET, OPTION_MASK_" s
else
return "0, CLVC_BIT_SET, MASK_" s
}
s = nth_arg(0, opt_args("InverseMask", flags));
if (s != "") {
vn = var_name(flags);
if (vn)
return "0, CLVC_BIT_CLEAR, OPTION_MASK_" s
else
return "0, CLVC_BIT_CLEAR, MASK_" s
}
if (flag_set_p("Enum.*", flags)) {
en = opt_args("Enum", flags);
return enum_index[en] ", CLVC_ENUM, 0"
}
if (var_type(flags) == "const char *")
return "0, CLVC_STRING, 0"
return "0, CLVC_BOOLEAN, 0"
}
# Given that an option called NAME has flags FLAGS, return an initializer
# for the "flag_var" field of its cl_options[] entry.
function var_ref(name, flags)
{
name = var_name(flags) static_var(name, flags)
if (name != "")
return "offsetof (struct gcc_options, x_" name ")"
if (opt_args("Mask", flags) != "")
return "offsetof (struct gcc_options, x_target_flags)"
if (opt_args("InverseMask", flags) != "")
return "offsetof (struct gcc_options, x_target_flags)"
return "(unsigned short) -1"
}
# Given the option called NAME return a sanitized version of its name.
function opt_sanitized_name(name)
{
gsub ("[^" alnum "]", "_", name)
return name
}
# Given the option called NAME return the appropriate enum for it.
function opt_enum(name)
{
return "OPT_" opt_sanitized_name(name)
}
# Given the language called NAME return a sanitized version of its name.
function lang_sanitized_name(name)
{
gsub( "[^" alnum "_]", "X", name )
return name
}
# Search for a valid var_name among all OPTS equal to option NAME.
# If not found, return "".
function search_var_name(name, opt_numbers, opts, flags, n_opts)
{
opt_var_name = var_name(flags[opt_numbers[name]]);
if (opt_var_name != "") {
return opt_var_name;
}
for (k = 0; k < n_opts; k++) {
if (opts[k] == name && var_name(flags[k]) != "") {
return var_name(flags[k]);
}
}
return ""
}
function integer_range_info(range_option, init, option)
{
if (range_option != "") {
start = nth_arg(0, range_option);
end = nth_arg(1, range_option);
if (init != "" && init != "-1" && (init < start || init > end))
print "#error initial value " init " of '" option "' must be in range [" start "," end "]"
return start ", " end
}
else
return "-1, -1"
}
# Handle LangEnabledBy(ENABLED_BY_LANGS, ENABLEDBY_NAME, ENABLEDBY_POSARG,
# ENABLEDBY_NEGARG). This function does not return anything.
function lang_enabled_by(enabledby_langs, enabledby_name, enabledby_posarg, enabledby_negarg)
{
n_enabledby_arg_langs = split(enabledby_langs, enabledby_arg_langs, " ");
if (enabledby_posarg != "" && enabledby_negarg != "") {
with_args = "," enabledby_posarg "," enabledby_negarg
} else if (enabledby_posarg == "" && enabledby_negarg == "") {
with_args = ""
} else {
print "#error " opts[i] " LangEnabledBy("enabledby_langs","enabledby_name", " \
enabledby_posarg", " enabledby_negargs \
") with three arguments, it should have either 2 or 4"
}
n_enabledby_array = split(enabledby_name, enabledby_array, " \\|\\| ");
for (k = 1; k <= n_enabledby_array; k++) {
enabledby_index = opt_numbers[enabledby_array[k]];
if (enabledby_index == "") {
print "#error " opts[i] " LangEnabledBy("enabledby_langs","enabledby_name", " \
enabledby_posarg", " enabledby_negargs"), unknown option '" enabledby_name "'"
} else {
for (j = 1; j <= n_enabledby_arg_langs; j++) {
lang_name = lang_sanitized_name(enabledby_arg_langs[j]);
lang_index = lang_numbers[enabledby_arg_langs[j]];
if (enables[lang_name,enabledby_array[k]] == "") {
enabledby[lang_name,n_enabledby_lang[lang_index]] = enabledby_array[k];
n_enabledby_lang[lang_index]++;
}
enables[lang_name,enabledby_array[k]] \
= enables[lang_name,enabledby_array[k]] opts[i] with_args ";";
}
}
}
}