| /* Command line option handling. |
| Copyright (C) 2006-2022 Free Software Foundation, Inc. |
| |
| This file is part of GCC. |
| |
| GCC 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. |
| |
| GCC 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 GCC; see the file COPYING3. If not see |
| <http://www.gnu.org/licenses/>. */ |
| |
| #include "config.h" |
| #include "system.h" |
| #include "intl.h" |
| #include "coretypes.h" |
| #include "opts.h" |
| #include "options.h" |
| #include "diagnostic.h" |
| #include "spellcheck.h" |
| |
| static void prune_options (struct cl_decoded_option **, unsigned int *); |
| |
| /* An option that is undocumented, that takes a joined argument, and |
| that doesn't fit any of the classes of uses (language/common, |
| driver, target) is assumed to be a prefix used to catch |
| e.g. negated options, and stop them from being further shortened to |
| a prefix that could use the negated option as an argument. For |
| example, we want -gno-statement-frontiers to be taken as a negation |
| of -gstatement-frontiers, but without catching the gno- prefix and |
| signaling it's to be used for option remapping, it would end up |
| backtracked to g with no-statemnet-frontiers as the debug level. */ |
| |
| static bool |
| remapping_prefix_p (const struct cl_option *opt) |
| { |
| return opt->flags & CL_UNDOCUMENTED |
| && opt->flags & CL_JOINED |
| && !(opt->flags & (CL_DRIVER | CL_TARGET | CL_COMMON | CL_LANG_ALL)); |
| } |
| |
| /* Perform a binary search to find which option the command-line INPUT |
| matches. Returns its index in the option array, and |
| OPT_SPECIAL_unknown on failure. |
| |
| This routine is quite subtle. A normal binary search is not good |
| enough because some options can be suffixed with an argument, and |
| multiple sub-matches can occur, e.g. input of "-pedantic" matching |
| the initial substring of "-pedantic-errors". |
| |
| A more complicated example is -gstabs. It should match "-g" with |
| an argument of "stabs". Suppose, however, that the number and list |
| of switches are such that the binary search tests "-gen-decls" |
| before having tested "-g". This doesn't match, and as "-gen-decls" |
| is less than "-gstabs", it will become the lower bound of the |
| binary search range, and "-g" will never be seen. To resolve this |
| issue, 'optc-gen.awk' makes "-gen-decls" point, via the back_chain member, |
| to "-g" so that failed searches that end between "-gen-decls" and |
| the lexicographically subsequent switch know to go back and see if |
| "-g" causes a match (which it does in this example). |
| |
| This search is done in such a way that the longest match for the |
| front end in question wins. If there is no match for the current |
| front end, the longest match for a different front end is returned |
| (or N_OPTS if none) and the caller emits an error message. */ |
| size_t |
| find_opt (const char *input, unsigned int lang_mask) |
| { |
| size_t mn, mn_orig, mx, md, opt_len; |
| size_t match_wrong_lang; |
| int comp; |
| |
| mn = 0; |
| mx = cl_options_count; |
| |
| /* Find mn such this lexicographical inequality holds: |
| cl_options[mn] <= input < cl_options[mn + 1]. */ |
| while (mx - mn > 1) |
| { |
| md = (mn + mx) / 2; |
| opt_len = cl_options[md].opt_len; |
| comp = strncmp (input, cl_options[md].opt_text + 1, opt_len); |
| |
| if (comp < 0) |
| mx = md; |
| else |
| mn = md; |
| } |
| |
| mn_orig = mn; |
| |
| /* This is the switch that is the best match but for a different |
| front end, or OPT_SPECIAL_unknown if there is no match at all. */ |
| match_wrong_lang = OPT_SPECIAL_unknown; |
| |
| /* Backtrace the chain of possible matches, returning the longest |
| one, if any, that fits best. With current GCC switches, this |
| loop executes at most twice. */ |
| do |
| { |
| const struct cl_option *opt = &cl_options[mn]; |
| |
| /* Is the input either an exact match or a prefix that takes a |
| joined argument? */ |
| if (!strncmp (input, opt->opt_text + 1, opt->opt_len) |
| && (input[opt->opt_len] == '\0' || (opt->flags & CL_JOINED))) |
| { |
| /* If language is OK, return it. */ |
| if (opt->flags & lang_mask) |
| return mn; |
| |
| if (remapping_prefix_p (opt)) |
| return OPT_SPECIAL_unknown; |
| |
| /* If we haven't remembered a prior match, remember this |
| one. Any prior match is necessarily better. */ |
| if (match_wrong_lang == OPT_SPECIAL_unknown) |
| match_wrong_lang = mn; |
| } |
| |
| /* Try the next possibility. This is cl_options_count if there |
| are no more. */ |
| mn = opt->back_chain; |
| } |
| while (mn != cl_options_count); |
| |
| if (match_wrong_lang == OPT_SPECIAL_unknown && input[0] == '-') |
| { |
| /* Long options, starting "--", may be abbreviated if the |
| abbreviation is unambiguous. This only applies to options |
| not taking a joined argument, and abbreviations of "--option" |
| are permitted even if there is a variant "--option=". */ |
| size_t mnc = mn_orig + 1; |
| size_t cmp_len = strlen (input); |
| while (mnc < cl_options_count |
| && strncmp (input, cl_options[mnc].opt_text + 1, cmp_len) == 0) |
| { |
| /* Option matching this abbreviation. OK if it is the first |
| match and that does not take a joined argument, or the |
| second match, taking a joined argument and with only '=' |
| added to the first match; otherwise considered |
| ambiguous. */ |
| if (mnc == mn_orig + 1 |
| && !(cl_options[mnc].flags & CL_JOINED)) |
| match_wrong_lang = mnc; |
| else if (mnc == mn_orig + 2 |
| && match_wrong_lang == mn_orig + 1 |
| && (cl_options[mnc].flags & CL_JOINED) |
| && (cl_options[mnc].opt_len |
| == cl_options[mn_orig + 1].opt_len + 1) |
| && strncmp (cl_options[mnc].opt_text + 1, |
| cl_options[mn_orig + 1].opt_text + 1, |
| cl_options[mn_orig + 1].opt_len) == 0) |
| ; /* OK, as long as there are no more matches. */ |
| else |
| return OPT_SPECIAL_unknown; |
| mnc++; |
| } |
| } |
| |
| /* Return the best wrong match, or OPT_SPECIAL_unknown if none. */ |
| return match_wrong_lang; |
| } |
| |
| /* If ARG is a non-negative decimal or hexadecimal integer representable |
| in HOST_WIDE_INT return its value, otherwise return -1. If ERR is not |
| null set *ERR to zero on success or to EINVAL or to the value of errno |
| otherwise. */ |
| |
| HOST_WIDE_INT |
| integral_argument (const char *arg, int *err, bool byte_size_suffix) |
| { |
| if (!err) |
| err = &errno; |
| |
| if (!ISDIGIT (*arg)) |
| { |
| *err = EINVAL; |
| return -1; |
| } |
| |
| *err = 0; |
| errno = 0; |
| |
| char *end = NULL; |
| unsigned HOST_WIDE_INT unit = 1; |
| unsigned HOST_WIDE_INT value = strtoull (arg, &end, 10); |
| |
| /* If the value is too large to be represented use the maximum |
| representable value that strtoull sets VALUE to (setting |
| errno to ERANGE). */ |
| |
| if (end && *end) |
| { |
| if (!byte_size_suffix) |
| { |
| errno = 0; |
| value = strtoull (arg, &end, 0); |
| if (*end) |
| { |
| if (errno) |
| *err = errno; |
| else |
| *err = EINVAL; |
| return -1; |
| } |
| |
| return value; |
| } |
| |
| /* Numeric option arguments are at most INT_MAX. Make it |
| possible to specify a larger value by accepting common |
| suffixes. */ |
| if (!strcmp (end, "kB")) |
| unit = 1000; |
| else if (!strcasecmp (end, "KiB") || !strcmp (end, "KB")) |
| unit = 1024; |
| else if (!strcmp (end, "MB")) |
| unit = HOST_WIDE_INT_UC (1000) * 1000; |
| else if (!strcasecmp (end, "MiB")) |
| unit = HOST_WIDE_INT_UC (1024) * 1024; |
| else if (!strcasecmp (end, "GB")) |
| unit = HOST_WIDE_INT_UC (1000) * 1000 * 1000; |
| else if (!strcasecmp (end, "GiB")) |
| unit = HOST_WIDE_INT_UC (1024) * 1024 * 1024; |
| else if (!strcasecmp (end, "TB")) |
| unit = HOST_WIDE_INT_UC (1000) * 1000 * 1000 * 1000; |
| else if (!strcasecmp (end, "TiB")) |
| unit = HOST_WIDE_INT_UC (1024) * 1024 * 1024 * 1024; |
| else if (!strcasecmp (end, "PB")) |
| unit = HOST_WIDE_INT_UC (1000) * 1000 * 1000 * 1000 * 1000; |
| else if (!strcasecmp (end, "PiB")) |
| unit = HOST_WIDE_INT_UC (1024) * 1024 * 1024 * 1024 * 1024; |
| else if (!strcasecmp (end, "EB")) |
| unit = HOST_WIDE_INT_UC (1000) * 1000 * 1000 * 1000 * 1000 |
| * 1000; |
| else if (!strcasecmp (end, "EiB")) |
| unit = HOST_WIDE_INT_UC (1024) * 1024 * 1024 * 1024 * 1024 |
| * 1024; |
| else |
| { |
| /* This could mean an unknown suffix or a bad prefix, like |
| "+-1". */ |
| *err = EINVAL; |
| return -1; |
| } |
| } |
| |
| if (unit) |
| { |
| unsigned HOST_WIDE_INT prod = value * unit; |
| value = prod < value ? HOST_WIDE_INT_M1U : prod; |
| } |
| |
| return value; |
| } |
| |
| /* Return whether OPTION is OK for the language given by |
| LANG_MASK. */ |
| static bool |
| option_ok_for_language (const struct cl_option *option, |
| unsigned int lang_mask) |
| { |
| if (!(option->flags & lang_mask)) |
| return false; |
| else if ((option->flags & CL_TARGET) |
| && (option->flags & (CL_LANG_ALL | CL_DRIVER)) |
| && !(option->flags & (lang_mask & ~CL_COMMON & ~CL_TARGET))) |
| /* Complain for target flag language mismatches if any languages |
| are specified. */ |
| return false; |
| return true; |
| } |
| |
| /* Return whether ENUM_ARG is OK for the language given by |
| LANG_MASK. */ |
| |
| static bool |
| enum_arg_ok_for_language (const struct cl_enum_arg *enum_arg, |
| unsigned int lang_mask) |
| { |
| return (lang_mask & CL_DRIVER) || !(enum_arg->flags & CL_ENUM_DRIVER_ONLY); |
| } |
| |
| /* Look up ARG in ENUM_ARGS for language LANG_MASK, returning the cl_enum_arg |
| index and storing the value in *VALUE if found, and returning -1 without |
| modifying *VALUE if not found. */ |
| |
| static int |
| enum_arg_to_value (const struct cl_enum_arg *enum_args, |
| const char *arg, size_t len, HOST_WIDE_INT *value, |
| unsigned int lang_mask) |
| { |
| unsigned int i; |
| |
| for (i = 0; enum_args[i].arg != NULL; i++) |
| if ((len |
| ? (strncmp (arg, enum_args[i].arg, len) == 0 |
| && enum_args[i].arg[len] == '\0') |
| : strcmp (arg, enum_args[i].arg) == 0) |
| && enum_arg_ok_for_language (&enum_args[i], lang_mask)) |
| { |
| *value = enum_args[i].value; |
| return i; |
| } |
| |
| return -1; |
| } |
| |
| /* Look up ARG in the enum used by option OPT_INDEX for language |
| LANG_MASK, returning true and storing the value in *VALUE if found, |
| and returning false without modifying *VALUE if not found. */ |
| |
| bool |
| opt_enum_arg_to_value (size_t opt_index, const char *arg, |
| int *value, unsigned int lang_mask) |
| { |
| const struct cl_option *option = &cl_options[opt_index]; |
| |
| gcc_assert (option->var_type == CLVC_ENUM); |
| |
| HOST_WIDE_INT wideval; |
| if (enum_arg_to_value (cl_enums[option->var_enum].values, arg, 0, |
| &wideval, lang_mask) >= 0) |
| { |
| *value = wideval; |
| return true; |
| } |
| |
| return false; |
| } |
| |
| /* Look of VALUE in ENUM_ARGS for language LANG_MASK and store the |
| corresponding string in *ARGP, returning true if the found string |
| was marked as canonical, false otherwise. If VALUE is not found |
| (which may be the case for uninitialized values if the relevant |
| option has not been passed), set *ARGP to NULL and return |
| false. */ |
| |
| bool |
| enum_value_to_arg (const struct cl_enum_arg *enum_args, |
| const char **argp, int value, unsigned int lang_mask) |
| { |
| unsigned int i; |
| |
| for (i = 0; enum_args[i].arg != NULL; i++) |
| if (enum_args[i].value == value |
| && (enum_args[i].flags & CL_ENUM_CANONICAL) |
| && enum_arg_ok_for_language (&enum_args[i], lang_mask)) |
| { |
| *argp = enum_args[i].arg; |
| return true; |
| } |
| |
| for (i = 0; enum_args[i].arg != NULL; i++) |
| if (enum_args[i].value == value |
| && enum_arg_ok_for_language (&enum_args[i], lang_mask)) |
| { |
| *argp = enum_args[i].arg; |
| return false; |
| } |
| |
| *argp = NULL; |
| return false; |
| } |
| |
| /* Fill in the canonical option part of *DECODED with an option |
| described by OPT_INDEX, ARG and VALUE. */ |
| |
| static void |
| generate_canonical_option (size_t opt_index, const char *arg, |
| HOST_WIDE_INT value, |
| struct cl_decoded_option *decoded) |
| { |
| const struct cl_option *option = &cl_options[opt_index]; |
| const char *opt_text = option->opt_text; |
| |
| if (value == 0 |
| && !option->cl_reject_negative |
| && (opt_text[1] == 'W' || opt_text[1] == 'f' |
| || opt_text[1] == 'g' || opt_text[1] == 'm')) |
| { |
| char *t = XOBNEWVEC (&opts_obstack, char, option->opt_len + 5); |
| t[0] = '-'; |
| t[1] = opt_text[1]; |
| t[2] = 'n'; |
| t[3] = 'o'; |
| t[4] = '-'; |
| memcpy (t + 5, opt_text + 2, option->opt_len); |
| opt_text = t; |
| } |
| |
| decoded->canonical_option[2] = NULL; |
| decoded->canonical_option[3] = NULL; |
| |
| if (arg) |
| { |
| if ((option->flags & CL_SEPARATE) |
| && !option->cl_separate_alias) |
| { |
| decoded->canonical_option[0] = opt_text; |
| decoded->canonical_option[1] = arg; |
| decoded->canonical_option_num_elements = 2; |
| } |
| else |
| { |
| gcc_assert (option->flags & CL_JOINED); |
| decoded->canonical_option[0] = opts_concat (opt_text, arg, NULL); |
| decoded->canonical_option[1] = NULL; |
| decoded->canonical_option_num_elements = 1; |
| } |
| } |
| else |
| { |
| decoded->canonical_option[0] = opt_text; |
| decoded->canonical_option[1] = NULL; |
| decoded->canonical_option_num_elements = 1; |
| } |
| } |
| |
| /* Structure describing mappings from options on the command line to |
| options to look up with find_opt. */ |
| struct option_map |
| { |
| /* Prefix of the option on the command line. */ |
| const char *opt0; |
| /* If two argv elements are considered to be merged into one option, |
| prefix for the second element, otherwise NULL. */ |
| const char *opt1; |
| /* The new prefix to map to. */ |
| const char *new_prefix; |
| /* Whether at least one character is needed following opt1 or opt0 |
| for this mapping to be used. (--optimize= is valid for -O, but |
| --warn- is not valid for -W.) */ |
| bool another_char_needed; |
| /* Whether the original option is a negated form of the option |
| resulting from this map. */ |
| bool negated; |
| }; |
| static const struct option_map option_map[] = |
| { |
| { "-Wno-", NULL, "-W", false, true }, |
| { "-fno-", NULL, "-f", false, true }, |
| { "-gno-", NULL, "-g", false, true }, |
| { "-mno-", NULL, "-m", false, true }, |
| { "--debug=", NULL, "-g", false, false }, |
| { "--machine-", NULL, "-m", true, false }, |
| { "--machine-no-", NULL, "-m", false, true }, |
| { "--machine=", NULL, "-m", false, false }, |
| { "--machine=no-", NULL, "-m", false, true }, |
| { "--machine", "", "-m", false, false }, |
| { "--machine", "no-", "-m", false, true }, |
| { "--optimize=", NULL, "-O", false, false }, |
| { "--std=", NULL, "-std=", false, false }, |
| { "--std", "", "-std=", false, false }, |
| { "--warn-", NULL, "-W", true, false }, |
| { "--warn-no-", NULL, "-W", false, true }, |
| { "--", NULL, "-f", true, false }, |
| { "--no-", NULL, "-f", false, true } |
| }; |
| |
| /* Helper function for gcc.cc's driver::suggest_option, for populating the |
| vec of suggestions for misspelled options. |
| |
| option_map above provides various prefixes for spelling command-line |
| options, which decode_cmdline_option uses to map spellings of options |
| to specific options. We want to do the reverse: to find all the ways |
| that a user could validly spell an option. |
| |
| Given valid OPT_TEXT (with a leading dash) for OPTION, add it and all |
| of its valid variant spellings to CANDIDATES, each without a leading |
| dash. |
| |
| For example, given "-Wabi-tag", the following are added to CANDIDATES: |
| "Wabi-tag" |
| "Wno-abi-tag" |
| "-warn-abi-tag" |
| "-warn-no-abi-tag". |
| |
| The added strings must be freed using free. */ |
| |
| void |
| add_misspelling_candidates (auto_vec<char *> *candidates, |
| const struct cl_option *option, |
| const char *opt_text) |
| { |
| gcc_assert (candidates); |
| gcc_assert (option); |
| gcc_assert (opt_text); |
| if (remapping_prefix_p (option)) |
| return; |
| candidates->safe_push (xstrdup (opt_text + 1)); |
| for (unsigned i = 0; i < ARRAY_SIZE (option_map); i++) |
| { |
| const char *opt0 = option_map[i].opt0; |
| const char *new_prefix = option_map[i].new_prefix; |
| size_t new_prefix_len = strlen (new_prefix); |
| |
| if (option->cl_reject_negative && option_map[i].negated) |
| continue; |
| |
| if (strncmp (opt_text, new_prefix, new_prefix_len) == 0) |
| { |
| char *alternative = concat (opt0 + 1, opt_text + new_prefix_len, |
| NULL); |
| candidates->safe_push (alternative); |
| } |
| } |
| |
| /* For all params (e.g. --param=key=value), |
| include also '--param key=value'. */ |
| const char *prefix = "--param="; |
| if (strstr (opt_text, prefix) == opt_text) |
| { |
| char *param = xstrdup (opt_text + 1); |
| gcc_assert (param[6] == '='); |
| param[6] = ' '; |
| candidates->safe_push (param); |
| } |
| } |
| |
| /* Decode the switch beginning at ARGV for the language indicated by |
| LANG_MASK (including CL_COMMON and CL_TARGET if applicable), into |
| the structure *DECODED. Returns the number of switches |
| consumed. */ |
| |
| static unsigned int |
| decode_cmdline_option (const char *const *argv, unsigned int lang_mask, |
| struct cl_decoded_option *decoded) |
| { |
| size_t opt_index; |
| const char *arg = 0; |
| HOST_WIDE_INT value = 1, mask = 0; |
| unsigned int result = 1, i, extra_args, separate_args = 0; |
| int adjust_len = 0; |
| size_t total_len; |
| char *p; |
| const struct cl_option *option; |
| int errors = 0; |
| const char *warn_message = NULL; |
| bool separate_arg_flag; |
| bool joined_arg_flag; |
| bool have_separate_arg = false; |
| |
| extra_args = 0; |
| |
| const char *opt_value = argv[0] + 1; |
| opt_index = find_opt (opt_value, lang_mask); |
| i = 0; |
| while (opt_index == OPT_SPECIAL_unknown |
| && i < ARRAY_SIZE (option_map)) |
| { |
| const char *opt0 = option_map[i].opt0; |
| const char *opt1 = option_map[i].opt1; |
| const char *new_prefix = option_map[i].new_prefix; |
| bool another_char_needed = option_map[i].another_char_needed; |
| size_t opt0_len = strlen (opt0); |
| size_t opt1_len = (opt1 == NULL ? 0 : strlen (opt1)); |
| size_t optn_len = (opt1 == NULL ? opt0_len : opt1_len); |
| size_t new_prefix_len = strlen (new_prefix); |
| |
| extra_args = (opt1 == NULL ? 0 : 1); |
| value = !option_map[i].negated; |
| |
| if (strncmp (argv[0], opt0, opt0_len) == 0 |
| && (opt1 == NULL |
| || (argv[1] != NULL && strncmp (argv[1], opt1, opt1_len) == 0)) |
| && (!another_char_needed |
| || argv[extra_args][optn_len] != 0)) |
| { |
| size_t arglen = strlen (argv[extra_args]); |
| char *dup; |
| |
| adjust_len = (int) optn_len - (int) new_prefix_len; |
| dup = XNEWVEC (char, arglen + 1 - adjust_len); |
| memcpy (dup, new_prefix, new_prefix_len); |
| memcpy (dup + new_prefix_len, argv[extra_args] + optn_len, |
| arglen - optn_len + 1); |
| opt_index = find_opt (dup + 1, lang_mask); |
| free (dup); |
| } |
| i++; |
| } |
| |
| if (opt_index == OPT_SPECIAL_unknown) |
| { |
| arg = argv[0]; |
| extra_args = 0; |
| value = 1; |
| goto done; |
| } |
| |
| option = &cl_options[opt_index]; |
| |
| /* Reject negative form of switches that don't take negatives as |
| unrecognized. */ |
| if (!value && option->cl_reject_negative) |
| { |
| opt_index = OPT_SPECIAL_unknown; |
| errors |= CL_ERR_NEGATIVE; |
| arg = argv[0]; |
| goto done; |
| } |
| |
| /* Clear the initial value for size options (it will be overwritten |
| later based on the Init(value) specification in the opt file. */ |
| if (option->var_type == CLVC_SIZE) |
| value = 0; |
| |
| result = extra_args + 1; |
| warn_message = option->warn_message; |
| |
| /* Check to see if the option is disabled for this configuration. */ |
| if (option->cl_disabled) |
| errors |= CL_ERR_DISABLED; |
| |
| /* Determine whether there may be a separate argument based on |
| whether this option is being processed for the driver, and, if |
| so, how many such arguments. */ |
| separate_arg_flag = ((option->flags & CL_SEPARATE) |
| && !(option->cl_no_driver_arg |
| && (lang_mask & CL_DRIVER))); |
| separate_args = (separate_arg_flag |
| ? option->cl_separate_nargs + 1 |
| : 0); |
| joined_arg_flag = (option->flags & CL_JOINED) != 0; |
| |
| /* Sort out any argument the switch takes. */ |
| if (joined_arg_flag) |
| { |
| /* Have arg point to the original switch. This is because |
| some code, such as disable_builtin_function, expects its |
| argument to be persistent until the program exits. */ |
| arg = argv[extra_args] + cl_options[opt_index].opt_len + 1 + adjust_len; |
| |
| if (*arg == '\0' && !option->cl_missing_ok) |
| { |
| if (separate_arg_flag) |
| { |
| arg = argv[extra_args + 1]; |
| result = extra_args + 2; |
| if (arg == NULL) |
| result = extra_args + 1; |
| else |
| have_separate_arg = true; |
| } |
| else |
| /* Missing argument. */ |
| arg = NULL; |
| } |
| } |
| else if (separate_arg_flag) |
| { |
| arg = argv[extra_args + 1]; |
| for (i = 0; i < separate_args; i++) |
| if (argv[extra_args + 1 + i] == NULL) |
| { |
| errors |= CL_ERR_MISSING_ARG; |
| break; |
| } |
| result = extra_args + 1 + i; |
| if (arg != NULL) |
| have_separate_arg = true; |
| } |
| |
| if (arg == NULL && (separate_arg_flag || joined_arg_flag)) |
| errors |= CL_ERR_MISSING_ARG; |
| |
| /* Is this option an alias (or an ignored option, marked as an alias |
| of OPT_SPECIAL_ignore)? */ |
| if (option->alias_target != N_OPTS |
| && (!option->cl_separate_alias || have_separate_arg)) |
| { |
| size_t new_opt_index = option->alias_target; |
| |
| if (new_opt_index == OPT_SPECIAL_ignore |
| || new_opt_index == OPT_SPECIAL_warn_removed) |
| { |
| gcc_assert (option->alias_arg == NULL); |
| gcc_assert (option->neg_alias_arg == NULL); |
| opt_index = new_opt_index; |
| arg = NULL; |
| } |
| else |
| { |
| const struct cl_option *new_option = &cl_options[new_opt_index]; |
| |
| /* The new option must not be an alias itself. */ |
| gcc_assert (new_option->alias_target == N_OPTS |
| || new_option->cl_separate_alias); |
| |
| if (option->neg_alias_arg) |
| { |
| gcc_assert (option->alias_arg != NULL); |
| gcc_assert (arg == NULL); |
| gcc_assert (!option->cl_negative_alias); |
| if (value) |
| arg = option->alias_arg; |
| else |
| arg = option->neg_alias_arg; |
| value = 1; |
| } |
| else if (option->alias_arg) |
| { |
| gcc_assert (value == 1); |
| gcc_assert (arg == NULL); |
| gcc_assert (!option->cl_negative_alias); |
| arg = option->alias_arg; |
| } |
| |
| if (option->cl_negative_alias) |
| value = !value; |
| |
| opt_index = new_opt_index; |
| option = new_option; |
| |
| if (value == 0) |
| gcc_assert (!option->cl_reject_negative); |
| |
| /* Recompute what arguments are allowed. */ |
| separate_arg_flag = ((option->flags & CL_SEPARATE) |
| && !(option->cl_no_driver_arg |
| && (lang_mask & CL_DRIVER))); |
| joined_arg_flag = (option->flags & CL_JOINED) != 0; |
| |
| if (separate_args > 1 || option->cl_separate_nargs) |
| gcc_assert (separate_args |
| == (unsigned int) option->cl_separate_nargs + 1); |
| |
| if (!(errors & CL_ERR_MISSING_ARG)) |
| { |
| if (separate_arg_flag || joined_arg_flag) |
| { |
| if (option->cl_missing_ok && arg == NULL) |
| arg = ""; |
| gcc_assert (arg != NULL); |
| } |
| else |
| gcc_assert (arg == NULL); |
| } |
| |
| /* Recheck for warnings and disabled options. */ |
| if (option->warn_message) |
| { |
| gcc_assert (warn_message == NULL); |
| warn_message = option->warn_message; |
| } |
| if (option->cl_disabled) |
| errors |= CL_ERR_DISABLED; |
| } |
| } |
| |
| /* Check if this is a switch for a different front end. */ |
| if (!option_ok_for_language (option, lang_mask)) |
| errors |= CL_ERR_WRONG_LANG; |
| else if (strcmp (option->opt_text, "-Werror=") == 0 |
| && strchr (opt_value, ',') == NULL) |
| { |
| /* Verify that -Werror argument is a valid warning |
| for a language. */ |
| char *werror_arg = xstrdup (opt_value + 6); |
| werror_arg[0] = 'W'; |
| |
| size_t warning_index = find_opt (werror_arg, lang_mask); |
| free (werror_arg); |
| if (warning_index != OPT_SPECIAL_unknown) |
| { |
| const struct cl_option *warning_option |
| = &cl_options[warning_index]; |
| if (!option_ok_for_language (warning_option, lang_mask)) |
| errors |= CL_ERR_WRONG_LANG; |
| } |
| } |
| |
| /* Convert the argument to lowercase if appropriate. */ |
| if (arg && option->cl_tolower) |
| { |
| size_t j; |
| size_t len = strlen (arg); |
| char *arg_lower = XOBNEWVEC (&opts_obstack, char, len + 1); |
| |
| for (j = 0; j < len; j++) |
| arg_lower[j] = TOLOWER ((unsigned char) arg[j]); |
| arg_lower[len] = 0; |
| arg = arg_lower; |
| } |
| |
| /* If the switch takes an integer argument, convert it. */ |
| if (arg && (option->cl_uinteger || option->cl_host_wide_int)) |
| { |
| int error = 0; |
| value = *arg ? integral_argument (arg, &error, option->cl_byte_size) : 0; |
| if (error) |
| errors |= CL_ERR_UINT_ARG; |
| |
| /* Reject value out of a range. */ |
| if (option->range_max != -1 |
| && (value < option->range_min || value > option->range_max)) |
| errors |= CL_ERR_INT_RANGE_ARG; |
| } |
| |
| /* If the switch takes an enumerated argument, convert it. */ |
| if (arg && (option->var_type == CLVC_ENUM)) |
| { |
| const struct cl_enum *e = &cl_enums[option->var_enum]; |
| |
| gcc_assert (option->var_value != CLEV_NORMAL || value == 1); |
| if (option->var_value != CLEV_NORMAL) |
| { |
| const char *p = arg; |
| HOST_WIDE_INT sum_value = 0; |
| unsigned HOST_WIDE_INT used_sets = 0; |
| do |
| { |
| const char *q = strchr (p, ','); |
| HOST_WIDE_INT this_value = 0; |
| if (q && q == p) |
| { |
| errors |= CL_ERR_ENUM_SET_ARG; |
| break; |
| } |
| int idx = enum_arg_to_value (e->values, p, q ? q - p : 0, |
| &this_value, lang_mask); |
| if (idx < 0) |
| { |
| errors |= CL_ERR_ENUM_SET_ARG; |
| break; |
| } |
| |
| HOST_WIDE_INT this_mask = 0; |
| if (option->var_value == CLEV_SET) |
| { |
| unsigned set = e->values[idx].flags >> CL_ENUM_SET_SHIFT; |
| gcc_checking_assert (set >= 1 |
| && set <= HOST_BITS_PER_WIDE_INT); |
| if ((used_sets & (HOST_WIDE_INT_1U << (set - 1))) != 0) |
| { |
| errors |= CL_ERR_ENUM_SET_ARG; |
| break; |
| } |
| used_sets |= HOST_WIDE_INT_1U << (set - 1); |
| |
| for (int i = 0; e->values[i].arg != NULL; i++) |
| if (set == (e->values[i].flags >> CL_ENUM_SET_SHIFT)) |
| this_mask |= e->values[i].value; |
| } |
| else |
| { |
| gcc_assert (option->var_value == CLEV_BITSET |
| && ((e->values[idx].flags >> CL_ENUM_SET_SHIFT) |
| == 0)); |
| this_mask = this_value; |
| } |
| |
| sum_value |= this_value; |
| mask |= this_mask; |
| if (q == NULL) |
| break; |
| p = q + 1; |
| } |
| while (1); |
| if (value == 1) |
| value = sum_value; |
| else |
| gcc_checking_assert (value == 0); |
| } |
| else if (enum_arg_to_value (e->values, arg, 0, &value, lang_mask) >= 0) |
| { |
| const char *carg = NULL; |
| |
| if (enum_value_to_arg (e->values, &carg, value, lang_mask)) |
| arg = carg; |
| gcc_assert (carg != NULL); |
| } |
| else |
| errors |= CL_ERR_ENUM_ARG; |
| } |
| |
| done: |
| decoded->opt_index = opt_index; |
| decoded->arg = arg; |
| decoded->value = value; |
| decoded->mask = mask; |
| decoded->errors = errors; |
| decoded->warn_message = warn_message; |
| |
| if (opt_index == OPT_SPECIAL_unknown) |
| gcc_assert (result == 1); |
| |
| gcc_assert (result >= 1 && result <= ARRAY_SIZE (decoded->canonical_option)); |
| decoded->canonical_option_num_elements = result; |
| total_len = 0; |
| for (i = 0; i < ARRAY_SIZE (decoded->canonical_option); i++) |
| { |
| if (i < result) |
| { |
| size_t len; |
| if (opt_index == OPT_SPECIAL_unknown) |
| decoded->canonical_option[i] = argv[i]; |
| else |
| decoded->canonical_option[i] = NULL; |
| len = strlen (argv[i]); |
| /* If the argument is an empty string, we will print it as "" in |
| orig_option_with_args_text. */ |
| total_len += (len != 0 ? len : 2) + 1; |
| } |
| else |
| decoded->canonical_option[i] = NULL; |
| } |
| if (opt_index != OPT_SPECIAL_unknown && opt_index != OPT_SPECIAL_ignore |
| && opt_index != OPT_SPECIAL_warn_removed) |
| { |
| generate_canonical_option (opt_index, arg, value, decoded); |
| if (separate_args > 1) |
| { |
| for (i = 0; i < separate_args; i++) |
| { |
| if (argv[extra_args + 1 + i] == NULL) |
| break; |
| else |
| decoded->canonical_option[1 + i] = argv[extra_args + 1 + i]; |
| } |
| gcc_assert (result == 1 + i); |
| decoded->canonical_option_num_elements = result; |
| } |
| } |
| decoded->orig_option_with_args_text |
| = p = XOBNEWVEC (&opts_obstack, char, total_len); |
| for (i = 0; i < result; i++) |
| { |
| size_t len = strlen (argv[i]); |
| |
| /* Print the empty string verbally. */ |
| if (len == 0) |
| { |
| *p++ = '"'; |
| *p++ = '"'; |
| } |
| else |
| memcpy (p, argv[i], len); |
| p += len; |
| if (i == result - 1) |
| *p++ = 0; |
| else |
| *p++ = ' '; |
| } |
| |
| return result; |
| } |
| |
| /* Obstack for option strings. */ |
| |
| struct obstack opts_obstack; |
| |
| /* Like libiberty concat, but allocate using opts_obstack. */ |
| |
| char * |
| opts_concat (const char *first, ...) |
| { |
| char *newstr, *end; |
| size_t length = 0; |
| const char *arg; |
| va_list ap; |
| |
| /* First compute the size of the result and get sufficient memory. */ |
| va_start (ap, first); |
| for (arg = first; arg; arg = va_arg (ap, const char *)) |
| length += strlen (arg); |
| newstr = XOBNEWVEC (&opts_obstack, char, length + 1); |
| va_end (ap); |
| |
| /* Now copy the individual pieces to the result string. */ |
| va_start (ap, first); |
| for (arg = first, end = newstr; arg; arg = va_arg (ap, const char *)) |
| { |
| length = strlen (arg); |
| memcpy (end, arg, length); |
| end += length; |
| } |
| *end = '\0'; |
| va_end (ap); |
| return newstr; |
| } |
| |
| /* Decode command-line options (ARGC and ARGV being the arguments of |
| main) into an array, setting *DECODED_OPTIONS to a pointer to that |
| array and *DECODED_OPTIONS_COUNT to the number of entries in the |
| array. The first entry in the array is always one for the program |
| name (OPT_SPECIAL_program_name). LANG_MASK indicates the language |
| flags applicable for decoding (including CL_COMMON and CL_TARGET if |
| those options should be considered applicable). Do not produce any |
| diagnostics or set state outside of these variables. */ |
| |
| void |
| decode_cmdline_options_to_array (unsigned int argc, const char **argv, |
| unsigned int lang_mask, |
| struct cl_decoded_option **decoded_options, |
| unsigned int *decoded_options_count) |
| { |
| unsigned int n, i; |
| struct cl_decoded_option *opt_array; |
| unsigned int num_decoded_options; |
| |
| int opt_array_len = argc; |
| opt_array = XNEWVEC (struct cl_decoded_option, opt_array_len); |
| |
| opt_array[0].opt_index = OPT_SPECIAL_program_name; |
| opt_array[0].warn_message = NULL; |
| opt_array[0].arg = argv[0]; |
| opt_array[0].orig_option_with_args_text = argv[0]; |
| opt_array[0].canonical_option_num_elements = 1; |
| opt_array[0].canonical_option[0] = argv[0]; |
| opt_array[0].canonical_option[1] = NULL; |
| opt_array[0].canonical_option[2] = NULL; |
| opt_array[0].canonical_option[3] = NULL; |
| opt_array[0].value = 1; |
| opt_array[0].mask = 0; |
| opt_array[0].errors = 0; |
| num_decoded_options = 1; |
| |
| for (i = 1; i < argc; i += n) |
| { |
| const char *opt = argv[i]; |
| |
| /* Interpret "-" or a non-switch as a file name. */ |
| if (opt[0] != '-' || opt[1] == '\0') |
| { |
| generate_option_input_file (opt, &opt_array[num_decoded_options]); |
| num_decoded_options++; |
| n = 1; |
| continue; |
| } |
| |
| /* Interpret "--param" "key=name" as "--param=key=name". */ |
| const char *needle = "--param"; |
| if (i + 1 < argc && strcmp (opt, needle) == 0) |
| { |
| const char *replacement |
| = opts_concat (needle, "=", argv[i + 1], NULL); |
| argv[++i] = replacement; |
| } |
| |
| /* Expand -fdiagnostics-plain-output to its constituents. This needs |
| to happen here so that prune_options can handle -fdiagnostics-color |
| specially. */ |
| if (!strcmp (opt, "-fdiagnostics-plain-output")) |
| { |
| /* If you have changed the default diagnostics output, and this new |
| output is not appropriately "plain" (e.g., the change needs to be |
| undone in order for the testsuite to work properly), then please do |
| the following: |
| 1. Add the necessary option to undo the new behavior to |
| the array below. |
| 2. Update the documentation for -fdiagnostics-plain-output |
| in invoke.texi. */ |
| const char *const expanded_args[] = { |
| "-fno-diagnostics-show-caret", |
| "-fno-diagnostics-show-line-numbers", |
| "-fdiagnostics-color=never", |
| "-fdiagnostics-urls=never", |
| "-fdiagnostics-path-format=separate-events", |
| }; |
| const int num_expanded = ARRAY_SIZE (expanded_args); |
| opt_array_len += num_expanded - 1; |
| opt_array = XRESIZEVEC (struct cl_decoded_option, |
| opt_array, opt_array_len); |
| for (int j = 0, nj; j < num_expanded; j += nj) |
| { |
| nj = decode_cmdline_option (expanded_args + j, lang_mask, |
| &opt_array[num_decoded_options]); |
| num_decoded_options++; |
| } |
| |
| n = 1; |
| continue; |
| } |
| |
| n = decode_cmdline_option (argv + i, lang_mask, |
| &opt_array[num_decoded_options]); |
| num_decoded_options++; |
| } |
| |
| *decoded_options = opt_array; |
| *decoded_options_count = num_decoded_options; |
| prune_options (decoded_options, decoded_options_count); |
| } |
| |
| /* Return true if NEXT_OPT_IDX cancels OPT_IDX. Return false if the |
| next one is the same as ORIG_NEXT_OPT_IDX. */ |
| |
| static bool |
| cancel_option (int opt_idx, int next_opt_idx, int orig_next_opt_idx) |
| { |
| /* An option can be canceled by the same option or an option with |
| Negative. */ |
| if (cl_options [next_opt_idx].neg_index == opt_idx) |
| return true; |
| |
| if (cl_options [next_opt_idx].neg_index != orig_next_opt_idx) |
| return cancel_option (opt_idx, cl_options [next_opt_idx].neg_index, |
| orig_next_opt_idx); |
| |
| return false; |
| } |
| |
| /* Filter out options canceled by the ones after them. */ |
| |
| static void |
| prune_options (struct cl_decoded_option **decoded_options, |
| unsigned int *decoded_options_count) |
| { |
| unsigned int old_decoded_options_count = *decoded_options_count; |
| struct cl_decoded_option *old_decoded_options = *decoded_options; |
| unsigned int new_decoded_options_count; |
| struct cl_decoded_option *new_decoded_options |
| = XNEWVEC (struct cl_decoded_option, old_decoded_options_count); |
| unsigned int i; |
| const struct cl_option *option; |
| unsigned int fdiagnostics_color_idx = 0; |
| |
| /* Remove arguments which are negated by others after them. */ |
| new_decoded_options_count = 0; |
| for (i = 0; i < old_decoded_options_count; i++) |
| { |
| unsigned int j, opt_idx, next_opt_idx; |
| |
| if (old_decoded_options[i].errors & ~CL_ERR_WRONG_LANG) |
| goto keep; |
| |
| opt_idx = old_decoded_options[i].opt_index; |
| switch (opt_idx) |
| { |
| case OPT_SPECIAL_unknown: |
| case OPT_SPECIAL_ignore: |
| case OPT_SPECIAL_warn_removed: |
| case OPT_SPECIAL_program_name: |
| case OPT_SPECIAL_input_file: |
| goto keep; |
| |
| /* Do not save OPT_fdiagnostics_color_, just remember the last one. */ |
| case OPT_fdiagnostics_color_: |
| fdiagnostics_color_idx = i; |
| continue; |
| |
| default: |
| gcc_assert (opt_idx < cl_options_count); |
| option = &cl_options[opt_idx]; |
| if (option->neg_index < 0) |
| goto keep; |
| |
| /* Skip joined switches. */ |
| if ((option->flags & CL_JOINED) |
| && (!option->cl_reject_negative |
| || (unsigned int) option->neg_index != opt_idx)) |
| goto keep; |
| |
| for (j = i + 1; j < old_decoded_options_count; j++) |
| { |
| if (old_decoded_options[j].errors & ~CL_ERR_WRONG_LANG) |
| continue; |
| next_opt_idx = old_decoded_options[j].opt_index; |
| if (next_opt_idx >= cl_options_count) |
| continue; |
| if (cl_options[next_opt_idx].neg_index < 0) |
| continue; |
| if ((cl_options[next_opt_idx].flags & CL_JOINED) |
| && (!cl_options[next_opt_idx].cl_reject_negative |
| || ((unsigned int) cl_options[next_opt_idx].neg_index |
| != next_opt_idx))) |
| continue; |
| if (cancel_option (opt_idx, next_opt_idx, next_opt_idx)) |
| break; |
| } |
| if (j == old_decoded_options_count) |
| { |
| keep: |
| new_decoded_options[new_decoded_options_count] |
| = old_decoded_options[i]; |
| new_decoded_options_count++; |
| } |
| break; |
| } |
| } |
| |
| if (fdiagnostics_color_idx >= 1) |
| { |
| /* We put the last -fdiagnostics-color= at the first position |
| after argv[0] so it can take effect immediately. */ |
| memmove (new_decoded_options + 2, new_decoded_options + 1, |
| sizeof (struct cl_decoded_option) |
| * (new_decoded_options_count - 1)); |
| new_decoded_options[1] = old_decoded_options[fdiagnostics_color_idx]; |
| new_decoded_options_count++; |
| } |
| |
| free (old_decoded_options); |
| new_decoded_options = XRESIZEVEC (struct cl_decoded_option, |
| new_decoded_options, |
| new_decoded_options_count); |
| *decoded_options = new_decoded_options; |
| *decoded_options_count = new_decoded_options_count; |
| } |
| |
| /* Handle option DECODED for the language indicated by LANG_MASK, |
| using the handlers in HANDLERS and setting fields in OPTS and |
| OPTS_SET. KIND is the diagnostic_t if this is a diagnostics |
| option, DK_UNSPECIFIED otherwise, and LOC is the location of the |
| option for options from the source file, UNKNOWN_LOCATION |
| otherwise. GENERATED_P is true for an option generated as part of |
| processing another option or otherwise generated internally, false |
| for one explicitly passed by the user. control_warning_option |
| generated options are considered explicitly passed by the user. |
| Returns false if the switch was invalid. DC is the diagnostic |
| context for options affecting diagnostics state, or NULL. */ |
| |
| static bool |
| handle_option (struct gcc_options *opts, |
| struct gcc_options *opts_set, |
| const struct cl_decoded_option *decoded, |
| unsigned int lang_mask, int kind, location_t loc, |
| const struct cl_option_handlers *handlers, |
| bool generated_p, diagnostic_context *dc) |
| { |
| size_t opt_index = decoded->opt_index; |
| const char *arg = decoded->arg; |
| HOST_WIDE_INT value = decoded->value; |
| HOST_WIDE_INT mask = decoded->mask; |
| const struct cl_option *option = &cl_options[opt_index]; |
| void *flag_var = option_flag_var (opt_index, opts); |
| size_t i; |
| |
| if (flag_var) |
| set_option (opts, (generated_p ? NULL : opts_set), |
| opt_index, value, arg, kind, loc, dc, mask); |
| |
| for (i = 0; i < handlers->num_handlers; i++) |
| if (option->flags & handlers->handlers[i].mask) |
| { |
| if (!handlers->handlers[i].handler (opts, opts_set, decoded, |
| lang_mask, kind, loc, |
| handlers, dc, |
| handlers->target_option_override_hook)) |
| return false; |
| } |
| |
| return true; |
| } |
| |
| /* Like handle_option, but OPT_INDEX, ARG and VALUE describe the |
| option instead of DECODED. This is used for callbacks when one |
| option implies another instead of an option being decoded from the |
| command line. */ |
| |
| bool |
| handle_generated_option (struct gcc_options *opts, |
| struct gcc_options *opts_set, |
| size_t opt_index, const char *arg, HOST_WIDE_INT value, |
| unsigned int lang_mask, int kind, location_t loc, |
| const struct cl_option_handlers *handlers, |
| bool generated_p, diagnostic_context *dc) |
| { |
| struct cl_decoded_option decoded; |
| |
| generate_option (opt_index, arg, value, lang_mask, &decoded); |
| return handle_option (opts, opts_set, &decoded, lang_mask, kind, loc, |
| handlers, generated_p, dc); |
| } |
| |
| /* Fill in *DECODED with an option described by OPT_INDEX, ARG and |
| VALUE for a front end using LANG_MASK. This is used when the |
| compiler generates options internally. */ |
| |
| void |
| generate_option (size_t opt_index, const char *arg, HOST_WIDE_INT value, |
| unsigned int lang_mask, struct cl_decoded_option *decoded) |
| { |
| const struct cl_option *option = &cl_options[opt_index]; |
| |
| decoded->opt_index = opt_index; |
| decoded->warn_message = NULL; |
| decoded->arg = arg; |
| decoded->value = value; |
| decoded->mask = 0; |
| decoded->errors = (option_ok_for_language (option, lang_mask) |
| ? 0 |
| : CL_ERR_WRONG_LANG); |
| |
| generate_canonical_option (opt_index, arg, value, decoded); |
| switch (decoded->canonical_option_num_elements) |
| { |
| case 1: |
| decoded->orig_option_with_args_text = decoded->canonical_option[0]; |
| break; |
| |
| case 2: |
| decoded->orig_option_with_args_text |
| = opts_concat (decoded->canonical_option[0], " ", |
| decoded->canonical_option[1], NULL); |
| break; |
| |
| default: |
| gcc_unreachable (); |
| } |
| } |
| |
| /* Fill in *DECODED with an option for input file FILE. */ |
| |
| void |
| generate_option_input_file (const char *file, |
| struct cl_decoded_option *decoded) |
| { |
| decoded->opt_index = OPT_SPECIAL_input_file; |
| decoded->warn_message = NULL; |
| decoded->arg = file; |
| decoded->orig_option_with_args_text = file; |
| decoded->canonical_option_num_elements = 1; |
| decoded->canonical_option[0] = file; |
| decoded->canonical_option[1] = NULL; |
| decoded->canonical_option[2] = NULL; |
| decoded->canonical_option[3] = NULL; |
| decoded->value = 1; |
| decoded->mask = 0; |
| decoded->errors = 0; |
| } |
| |
| /* Helper function for listing valid choices and hint for misspelled |
| value. CANDIDATES is a vector containing all valid strings, |
| STR is set to a heap allocated string that contains all those |
| strings concatenated, separated by spaces, and the return value |
| is the closest string from those to ARG, or NULL if nothing is |
| close enough. Callers should XDELETEVEC (STR) after using it |
| to avoid memory leaks. */ |
| |
| const char * |
| candidates_list_and_hint (const char *arg, char *&str, |
| const auto_vec <const char *> &candidates) |
| { |
| size_t len = 0; |
| int i; |
| const char *candidate; |
| char *p; |
| |
| FOR_EACH_VEC_ELT (candidates, i, candidate) |
| len += strlen (candidate) + 1; |
| |
| str = p = XNEWVEC (char, len); |
| FOR_EACH_VEC_ELT (candidates, i, candidate) |
| { |
| len = strlen (candidate); |
| memcpy (p, candidate, len); |
| p[len] = ' '; |
| p += len + 1; |
| } |
| p[-1] = '\0'; |
| return find_closest_string (arg, &candidates); |
| } |
| |
| /* Perform diagnostics for read_cmdline_option and control_warning_option |
| functions. Returns true if an error has been diagnosed. |
| LOC and LANG_MASK arguments like in read_cmdline_option. |
| OPTION is the option to report diagnostics for, OPT the name |
| of the option as text, ARG the argument of the option (for joined |
| options), ERRORS is bitmask of CL_ERR_* values. */ |
| |
| static bool |
| cmdline_handle_error (location_t loc, const struct cl_option *option, |
| const char *opt, const char *arg, int errors, |
| unsigned int lang_mask) |
| { |
| if (errors & CL_ERR_DISABLED) |
| { |
| error_at (loc, "command-line option %qs" |
| " is not supported by this configuration", opt); |
| return true; |
| } |
| |
| if (errors & CL_ERR_MISSING_ARG) |
| { |
| if (option->missing_argument_error) |
| error_at (loc, option->missing_argument_error, opt); |
| else |
| error_at (loc, "missing argument to %qs", opt); |
| return true; |
| } |
| |
| if (errors & CL_ERR_UINT_ARG) |
| { |
| if (option->cl_byte_size) |
| error_at (loc, "argument to %qs should be a non-negative integer " |
| "optionally followed by a size unit", |
| option->opt_text); |
| else |
| error_at (loc, "argument to %qs should be a non-negative integer", |
| option->opt_text); |
| return true; |
| } |
| |
| if (errors & CL_ERR_INT_RANGE_ARG) |
| { |
| error_at (loc, "argument to %qs is not between %d and %d", |
| option->opt_text, option->range_min, option->range_max); |
| return true; |
| } |
| |
| if (errors & CL_ERR_ENUM_SET_ARG) |
| { |
| const struct cl_enum *e = &cl_enums[option->var_enum]; |
| const char *p = arg; |
| unsigned HOST_WIDE_INT used_sets = 0; |
| const char *second_opt = NULL; |
| size_t second_opt_len = 0; |
| errors = 0; |
| do |
| { |
| const char *q = strchr (p, ','); |
| HOST_WIDE_INT this_value = 0; |
| if (q && q == p) |
| { |
| arg = ""; |
| errors = CL_ERR_ENUM_ARG; |
| break; |
| } |
| int idx = enum_arg_to_value (e->values, p, q ? q - p : 0, |
| &this_value, lang_mask); |
| if (idx < 0) |
| { |
| if (q == NULL) |
| q = strchr (p, '\0'); |
| char *narg = XALLOCAVEC (char, (q - p) + 1); |
| memcpy (narg, p, q - p); |
| narg[q - p] = '\0'; |
| arg = narg; |
| errors = CL_ERR_ENUM_ARG; |
| break; |
| } |
| |
| if (option->var_value == CLEV_BITSET) |
| { |
| if (q == NULL) |
| break; |
| p = q + 1; |
| continue; |
| } |
| |
| unsigned set = e->values[idx].flags >> CL_ENUM_SET_SHIFT; |
| gcc_checking_assert (set >= 1 && set <= HOST_BITS_PER_WIDE_INT); |
| if ((used_sets & (HOST_WIDE_INT_1U << (set - 1))) != 0) |
| { |
| if (q == NULL) |
| q = strchr (p, '\0'); |
| if (second_opt == NULL) |
| { |
| used_sets = HOST_WIDE_INT_1U << (set - 1); |
| second_opt = p; |
| second_opt_len = q - p; |
| p = arg; |
| continue; |
| } |
| char *args = XALLOCAVEC (char, (q - p) + 1 + second_opt_len + 1); |
| memcpy (args, p, q - p); |
| args[q - p] = '\0'; |
| memcpy (args + (q - p) + 1, second_opt, second_opt_len); |
| args[(q - p) + 1 + second_opt_len] = '\0'; |
| error_at (loc, "invalid argument in option %qs", opt); |
| if (strcmp (args, args + (q - p) + 1) == 0) |
| inform (loc, "%qs specified multiple times in the same option", |
| args); |
| else |
| inform (loc, "%qs is mutually exclusive with %qs and cannot be" |
| " specified together", args, args + (q - p) + 1); |
| return true; |
| } |
| used_sets |= HOST_WIDE_INT_1U << (set - 1); |
| if (q == NULL) |
| break; |
| p = q + 1; |
| } |
| while (1); |
| } |
| |
| if (errors & CL_ERR_ENUM_ARG) |
| { |
| const struct cl_enum *e = &cl_enums[option->var_enum]; |
| unsigned int i; |
| char *s; |
| |
| auto_diagnostic_group d; |
| if (e->unknown_error) |
| error_at (loc, e->unknown_error, arg); |
| else |
| error_at (loc, "unrecognized argument in option %qs", opt); |
| |
| auto_vec <const char *> candidates; |
| for (i = 0; e->values[i].arg != NULL; i++) |
| { |
| if (!enum_arg_ok_for_language (&e->values[i], lang_mask)) |
| continue; |
| candidates.safe_push (e->values[i].arg); |
| } |
| const char *hint = candidates_list_and_hint (arg, s, candidates); |
| if (hint) |
| inform (loc, "valid arguments to %qs are: %s; did you mean %qs?", |
| option->opt_text, s, hint); |
| else |
| inform (loc, "valid arguments to %qs are: %s", option->opt_text, s); |
| XDELETEVEC (s); |
| |
| return true; |
| } |
| |
| return false; |
| } |
| |
| /* Handle the switch DECODED (location LOC) for the language indicated |
| by LANG_MASK, using the handlers in *HANDLERS and setting fields in |
| OPTS and OPTS_SET and using diagnostic context DC (if not NULL) for |
| diagnostic options. */ |
| |
| void |
| read_cmdline_option (struct gcc_options *opts, |
| struct gcc_options *opts_set, |
| struct cl_decoded_option *decoded, |
| location_t loc, |
| unsigned int lang_mask, |
| const struct cl_option_handlers *handlers, |
| diagnostic_context *dc) |
| { |
| const struct cl_option *option; |
| const char *opt = decoded->orig_option_with_args_text; |
| |
| if (decoded->warn_message) |
| warning_at (loc, 0, decoded->warn_message, opt); |
| |
| if (decoded->opt_index == OPT_SPECIAL_unknown) |
| { |
| if (handlers->unknown_option_callback (decoded)) |
| error_at (loc, "unrecognized command-line option %qs", decoded->arg); |
| return; |
| } |
| |
| if (decoded->opt_index == OPT_SPECIAL_ignore) |
| return; |
| |
| if (decoded->opt_index == OPT_SPECIAL_warn_removed) |
| { |
| /* Warn only about positive ignored options. */ |
| if (decoded->value) |
| warning_at (loc, 0, "switch %qs is no longer supported", opt); |
| return; |
| } |
| |
| option = &cl_options[decoded->opt_index]; |
| |
| if (decoded->errors |
| && cmdline_handle_error (loc, option, opt, decoded->arg, |
| decoded->errors, lang_mask)) |
| return; |
| |
| if (decoded->errors & CL_ERR_WRONG_LANG) |
| { |
| handlers->wrong_lang_callback (decoded, lang_mask); |
| return; |
| } |
| |
| gcc_assert (!decoded->errors); |
| |
| if (!handle_option (opts, opts_set, decoded, lang_mask, DK_UNSPECIFIED, |
| loc, handlers, false, dc)) |
| error_at (loc, "unrecognized command-line option %qs", opt); |
| } |
| |
| /* Set any field in OPTS, and OPTS_SET if not NULL, for option |
| OPT_INDEX according to VALUE and ARG, diagnostic kind KIND, |
| location LOC, using diagnostic context DC if not NULL for |
| diagnostic classification. */ |
| |
| void |
| set_option (struct gcc_options *opts, struct gcc_options *opts_set, |
| int opt_index, HOST_WIDE_INT value, const char *arg, int kind, |
| location_t loc, diagnostic_context *dc, |
| HOST_WIDE_INT mask /* = 0 */) |
| { |
| const struct cl_option *option = &cl_options[opt_index]; |
| void *flag_var = option_flag_var (opt_index, opts); |
| void *set_flag_var = NULL; |
| |
| if (!flag_var) |
| return; |
| |
| if ((diagnostic_t) kind != DK_UNSPECIFIED && dc != NULL) |
| diagnostic_classify_diagnostic (dc, opt_index, (diagnostic_t) kind, loc); |
| |
| if (opts_set != NULL) |
| set_flag_var = option_flag_var (opt_index, opts_set); |
| |
| switch (option->var_type) |
| { |
| case CLVC_INTEGER: |
| if (option->cl_host_wide_int) |
| { |
| *(HOST_WIDE_INT *) flag_var = value; |
| if (set_flag_var) |
| *(HOST_WIDE_INT *) set_flag_var = 1; |
| } |
| else |
| { |
| if (value > INT_MAX) |
| error_at (loc, "argument to %qs is bigger than %d", |
| option->opt_text, INT_MAX); |
| else |
| { |
| *(int *) flag_var = value; |
| if (set_flag_var) |
| *(int *) set_flag_var = 1; |
| } |
| } |
| |
| break; |
| |
| case CLVC_SIZE: |
| if (option->cl_host_wide_int) |
| { |
| *(HOST_WIDE_INT *) flag_var = value; |
| if (set_flag_var) |
| *(HOST_WIDE_INT *) set_flag_var = value; |
| } |
| else |
| { |
| *(int *) flag_var = value; |
| if (set_flag_var) |
| *(int *) set_flag_var = value; |
| } |
| |
| break; |
| |
| case CLVC_EQUAL: |
| if (option->cl_host_wide_int) |
| { |
| *(HOST_WIDE_INT *) flag_var = (value |
| ? option->var_value |
| : !option->var_value); |
| if (set_flag_var) |
| *(HOST_WIDE_INT *) set_flag_var = 1; |
| } |
| else |
| { |
| *(int *) flag_var = (value |
| ? option->var_value |
| : !option->var_value); |
| if (set_flag_var) |
| *(int *) set_flag_var = 1; |
| } |
| break; |
| |
| case CLVC_BIT_CLEAR: |
| case CLVC_BIT_SET: |
| if ((value != 0) == (option->var_type == CLVC_BIT_SET)) |
| { |
| if (option->cl_host_wide_int) |
| *(HOST_WIDE_INT *) flag_var |= option->var_value; |
| else |
| *(int *) flag_var |= option->var_value; |
| } |
| else |
| { |
| if (option->cl_host_wide_int) |
| *(HOST_WIDE_INT *) flag_var &= ~option->var_value; |
| else |
| *(int *) flag_var &= ~option->var_value; |
| } |
| if (set_flag_var) |
| { |
| if (option->cl_host_wide_int) |
| *(HOST_WIDE_INT *) set_flag_var |= option->var_value; |
| else |
| *(int *) set_flag_var |= option->var_value; |
| } |
| break; |
| |
| case CLVC_STRING: |
| *(const char **) flag_var = arg; |
| if (set_flag_var) |
| *(const char **) set_flag_var = ""; |
| break; |
| |
| case CLVC_ENUM: |
| { |
| const struct cl_enum *e = &cl_enums[option->var_enum]; |
| |
| if (mask) |
| e->set (flag_var, value | (e->get (flag_var) & ~mask)); |
| else |
| e->set (flag_var, value); |
| if (set_flag_var) |
| e->set (set_flag_var, 1); |
| } |
| break; |
| |
| case CLVC_DEFER: |
| { |
| vec<cl_deferred_option> *v |
| = (vec<cl_deferred_option> *) *(void **) flag_var; |
| cl_deferred_option p = {opt_index, arg, value}; |
| if (!v) |
| v = XCNEW (vec<cl_deferred_option>); |
| v->safe_push (p); |
| *(void **) flag_var = v; |
| if (set_flag_var) |
| *(void **) set_flag_var = v; |
| } |
| break; |
| } |
| } |
| |
| /* Return the address of the flag variable for option OPT_INDEX in |
| options structure OPTS, or NULL if there is no flag variable. */ |
| |
| void * |
| option_flag_var (int opt_index, struct gcc_options *opts) |
| { |
| const struct cl_option *option = &cl_options[opt_index]; |
| |
| if (option->flag_var_offset == (unsigned short) -1) |
| return NULL; |
| return (void *)(((char *) opts) + option->flag_var_offset); |
| } |
| |
| /* Return 1 if option OPT_IDX is enabled in OPTS, 0 if it is disabled, |
| or -1 if it isn't a simple on-off switch |
| (or if the value is unknown, typically set later in target). */ |
| |
| int |
| option_enabled (int opt_idx, unsigned lang_mask, void *opts) |
| { |
| const struct cl_option *option = &(cl_options[opt_idx]); |
| |
| /* A language-specific option can only be considered enabled when it's |
| valid for the current language. */ |
| if (!(option->flags & CL_COMMON) |
| && (option->flags & CL_LANG_ALL) |
| && !(option->flags & lang_mask)) |
| return 0; |
| |
| struct gcc_options *optsg = (struct gcc_options *) opts; |
| void *flag_var = option_flag_var (opt_idx, optsg); |
| |
| if (flag_var) |
| switch (option->var_type) |
| { |
| case CLVC_INTEGER: |
| if (option->cl_host_wide_int) |
| { |
| HOST_WIDE_INT v = *(HOST_WIDE_INT *) flag_var; |
| return v != 0 ? (v < 0 ? -1 : 1) : 0; |
| } |
| else |
| { |
| int v = *(int *) flag_var; |
| return v != 0 ? (v < 0 ? -1 : 1) : 0; |
| } |
| |
| case CLVC_EQUAL: |
| if (option->cl_host_wide_int) |
| return *(HOST_WIDE_INT *) flag_var == option->var_value; |
| else |
| return *(int *) flag_var == option->var_value; |
| |
| case CLVC_BIT_CLEAR: |
| if (option->cl_host_wide_int) |
| return (*(HOST_WIDE_INT *) flag_var & option->var_value) == 0; |
| else |
| return (*(int *) flag_var & option->var_value) == 0; |
| |
| case CLVC_BIT_SET: |
| if (option->cl_host_wide_int) |
| return (*(HOST_WIDE_INT *) flag_var & option->var_value) != 0; |
| else |
| return (*(int *) flag_var & option->var_value) != 0; |
| |
| case CLVC_SIZE: |
| if (option->cl_host_wide_int) |
| return *(HOST_WIDE_INT *) flag_var != -1; |
| else |
| return *(int *) flag_var != -1; |
| |
| case CLVC_STRING: |
| case CLVC_ENUM: |
| case CLVC_DEFER: |
| break; |
| } |
| return -1; |
| } |
| |
| /* Fill STATE with the current state of option OPTION in OPTS. Return |
| true if there is some state to store. */ |
| |
| bool |
| get_option_state (struct gcc_options *opts, int option, |
| struct cl_option_state *state) |
| { |
| void *flag_var = option_flag_var (option, opts); |
| |
| if (flag_var == 0) |
| return false; |
| |
| switch (cl_options[option].var_type) |
| { |
| case CLVC_INTEGER: |
| case CLVC_EQUAL: |
| case CLVC_SIZE: |
| state->data = flag_var; |
| state->size = (cl_options[option].cl_host_wide_int |
| ? sizeof (HOST_WIDE_INT) |
| : sizeof (int)); |
| break; |
| |
| case CLVC_BIT_CLEAR: |
| case CLVC_BIT_SET: |
| state->ch = option_enabled (option, -1, opts); |
| state->data = &state->ch; |
| state->size = 1; |
| break; |
| |
| case CLVC_STRING: |
| state->data = *(const char **) flag_var; |
| if (state->data == 0) |
| state->data = ""; |
| state->size = strlen ((const char *) state->data) + 1; |
| break; |
| |
| case CLVC_ENUM: |
| state->data = flag_var; |
| state->size = cl_enums[cl_options[option].var_enum].var_size; |
| break; |
| |
| case CLVC_DEFER: |
| return false; |
| } |
| return true; |
| } |
| |
| /* Set a warning option OPT_INDEX (language mask LANG_MASK, option |
| handlers HANDLERS) to have diagnostic kind KIND for option |
| structures OPTS and OPTS_SET and diagnostic context DC (possibly |
| NULL), at location LOC (UNKNOWN_LOCATION for -Werror=). ARG is the |
| argument of the option for joined options, or NULL otherwise. If IMPLY, |
| the warning option in question is implied at this point. This is |
| used by -Werror= and #pragma GCC diagnostic. */ |
| |
| void |
| control_warning_option (unsigned int opt_index, int kind, const char *arg, |
| bool imply, location_t loc, unsigned int lang_mask, |
| const struct cl_option_handlers *handlers, |
| struct gcc_options *opts, |
| struct gcc_options *opts_set, |
| diagnostic_context *dc) |
| { |
| if (cl_options[opt_index].alias_target != N_OPTS) |
| { |
| gcc_assert (!cl_options[opt_index].cl_separate_alias |
| && !cl_options[opt_index].cl_negative_alias); |
| if (cl_options[opt_index].alias_arg) |
| arg = cl_options[opt_index].alias_arg; |
| opt_index = cl_options[opt_index].alias_target; |
| } |
| if (opt_index == OPT_SPECIAL_ignore || opt_index == OPT_SPECIAL_warn_removed) |
| return; |
| if (dc) |
| diagnostic_classify_diagnostic (dc, opt_index, (diagnostic_t) kind, loc); |
| if (imply) |
| { |
| const struct cl_option *option = &cl_options[opt_index]; |
| |
| /* -Werror=foo implies -Wfoo. */ |
| if (option->var_type == CLVC_INTEGER |
| || option->var_type == CLVC_ENUM |
| || option->var_type == CLVC_SIZE) |
| { |
| HOST_WIDE_INT value = 1; |
| |
| if (arg && *arg == '\0' && !option->cl_missing_ok) |
| arg = NULL; |
| |
| if ((option->flags & CL_JOINED) && arg == NULL) |
| { |
| cmdline_handle_error (loc, option, option->opt_text, arg, |
| CL_ERR_MISSING_ARG, lang_mask); |
| return; |
| } |
| |
| /* If the switch takes an integer argument, convert it. */ |
| if (arg && (option->cl_uinteger || option->cl_host_wide_int)) |
| { |
| int error = 0; |
| value = *arg ? integral_argument (arg, &error, |
| option->cl_byte_size) : 0; |
| if (error) |
| { |
| cmdline_handle_error (loc, option, option->opt_text, arg, |
| CL_ERR_UINT_ARG, lang_mask); |
| return; |
| } |
| } |
| |
| /* If the switch takes an enumerated argument, convert it. */ |
| if (arg && option->var_type == CLVC_ENUM) |
| { |
| const struct cl_enum *e = &cl_enums[option->var_enum]; |
| |
| if (enum_arg_to_value (e->values, arg, 0, &value, |
| lang_mask) >= 0) |
| { |
| const char *carg = NULL; |
| |
| if (enum_value_to_arg (e->values, &carg, value, lang_mask)) |
| arg = carg; |
| gcc_assert (carg != NULL); |
| } |
| else |
| { |
| cmdline_handle_error (loc, option, option->opt_text, arg, |
| CL_ERR_ENUM_ARG, lang_mask); |
| return; |
| } |
| } |
| |
| handle_generated_option (opts, opts_set, |
| opt_index, arg, value, lang_mask, |
| kind, loc, handlers, false, dc); |
| } |
| } |
| } |
| |
| /* Parse options in COLLECT_GCC_OPTIONS and push them on ARGV_OBSTACK. |
| Store number of arguments into ARGC_P. */ |
| |
| void |
| parse_options_from_collect_gcc_options (const char *collect_gcc_options, |
| obstack *argv_obstack, |
| int *argc_p) |
| { |
| char *argv_storage = xstrdup (collect_gcc_options); |
| int j, k; |
| |
| for (j = 0, k = 0; argv_storage[j] != '\0'; ++j) |
| { |
| if (argv_storage[j] == '\'') |
| { |
| obstack_ptr_grow (argv_obstack, &argv_storage[k]); |
| ++j; |
| do |
| { |
| if (argv_storage[j] == '\0') |
| fatal_error (input_location, |
| "malformed %<COLLECT_GCC_OPTIONS%>"); |
| else if (startswith (&argv_storage[j], "'\\''")) |
| { |
| argv_storage[k++] = '\''; |
| j += 4; |
| } |
| else if (argv_storage[j] == '\'') |
| break; |
| else |
| argv_storage[k++] = argv_storage[j++]; |
| } |
| while (1); |
| argv_storage[k++] = '\0'; |
| } |
| } |
| |
| obstack_ptr_grow (argv_obstack, NULL); |
| *argc_p = obstack_object_size (argv_obstack) / sizeof (void *) - 1; |
| } |
| |
| /* Prepend -Xassembler for each option in COLLECT_AS_OPTIONS, |
| and push on O. */ |
| |
| void prepend_xassembler_to_collect_as_options (const char *collect_as_options, |
| obstack *o) |
| { |
| obstack opts_obstack; |
| int opts_count; |
| |
| obstack_init (&opts_obstack); |
| parse_options_from_collect_gcc_options (collect_as_options, |
| &opts_obstack, &opts_count); |
| const char **assembler_opts = XOBFINISH (&opts_obstack, const char **); |
| |
| for (int i = 0; i < opts_count; i++) |
| { |
| obstack_grow (o, " '-Xassembler' ", |
| strlen (" '-Xassembler' ")); |
| const char *opt = assembler_opts[i]; |
| obstack_1grow (o, '\''); |
| obstack_grow (o, opt, strlen (opt)); |
| obstack_1grow (o, '\''); |
| } |
| } |