| /* Language-independent diagnostic subroutines for the GNU Compiler Collection |
| Copyright (C) 1999-2020 Free Software Foundation, Inc. |
| Contributed by Gabriel Dos Reis <gdr@codesourcery.com> |
| |
| 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/>. */ |
| |
| |
| /* This file implements the language independent aspect of diagnostic |
| message module. */ |
| |
| #include "config.h" |
| #include "system.h" |
| #include "coretypes.h" |
| #include "version.h" |
| #include "demangle.h" |
| #include "intl.h" |
| #include "backtrace.h" |
| #include "diagnostic.h" |
| #include "diagnostic-color.h" |
| #include "diagnostic-url.h" |
| #include "diagnostic-metadata.h" |
| #include "diagnostic-path.h" |
| #include "edit-context.h" |
| #include "selftest.h" |
| #include "selftest-diagnostic.h" |
| #include "opts.h" |
| |
| #ifdef HAVE_TERMIOS_H |
| # include <termios.h> |
| #endif |
| |
| #ifdef GWINSZ_IN_SYS_IOCTL |
| # include <sys/ioctl.h> |
| #endif |
| |
| /* Disable warnings about quoting issues in the pp_xxx calls below |
| that (intentionally) don't follow GCC diagnostic conventions. */ |
| #if __GNUC__ >= 10 |
| # pragma GCC diagnostic push |
| # pragma GCC diagnostic ignored "-Wformat-diag" |
| #endif |
| |
| #define pedantic_warning_kind(DC) \ |
| ((DC)->pedantic_errors ? DK_ERROR : DK_WARNING) |
| #define permissive_error_kind(DC) ((DC)->permissive ? DK_WARNING : DK_ERROR) |
| #define permissive_error_option(DC) ((DC)->opt_permissive) |
| |
| /* Prototypes. */ |
| static bool diagnostic_impl (rich_location *, const diagnostic_metadata *, |
| int, const char *, |
| va_list *, diagnostic_t) ATTRIBUTE_GCC_DIAG(4,0); |
| static bool diagnostic_n_impl (rich_location *, const diagnostic_metadata *, |
| int, unsigned HOST_WIDE_INT, |
| const char *, const char *, va_list *, |
| diagnostic_t) ATTRIBUTE_GCC_DIAG(6,0); |
| |
| static void error_recursion (diagnostic_context *) ATTRIBUTE_NORETURN; |
| static void real_abort (void) ATTRIBUTE_NORETURN; |
| |
| /* Name of program invoked, sans directories. */ |
| |
| const char *progname; |
| |
| /* A diagnostic_context surrogate for stderr. */ |
| static diagnostic_context global_diagnostic_context; |
| diagnostic_context *global_dc = &global_diagnostic_context; |
| |
| /* Return a malloc'd string containing MSG formatted a la printf. The |
| caller is responsible for freeing the memory. */ |
| char * |
| build_message_string (const char *msg, ...) |
| { |
| char *str; |
| va_list ap; |
| |
| va_start (ap, msg); |
| str = xvasprintf (msg, ap); |
| va_end (ap); |
| |
| return str; |
| } |
| |
| /* Same as diagnostic_build_prefix, but only the source FILE is given. */ |
| char * |
| file_name_as_prefix (diagnostic_context *context, const char *f) |
| { |
| const char *locus_cs |
| = colorize_start (pp_show_color (context->printer), "locus"); |
| const char *locus_ce = colorize_stop (pp_show_color (context->printer)); |
| return build_message_string ("%s%s:%s ", locus_cs, f, locus_ce); |
| } |
| |
| |
| |
| /* Return the value of the getenv("COLUMNS") as an integer. If the |
| value is not set to a positive integer, use ioctl to get the |
| terminal width. If it fails, return INT_MAX. */ |
| int |
| get_terminal_width (void) |
| { |
| const char * s = getenv ("COLUMNS"); |
| if (s != NULL) { |
| int n = atoi (s); |
| if (n > 0) |
| return n; |
| } |
| |
| #ifdef TIOCGWINSZ |
| struct winsize w; |
| w.ws_col = 0; |
| if (ioctl (0, TIOCGWINSZ, &w) == 0 && w.ws_col > 0) |
| return w.ws_col; |
| #endif |
| |
| return INT_MAX; |
| } |
| |
| /* Set caret_max_width to value. */ |
| void |
| diagnostic_set_caret_max_width (diagnostic_context *context, int value) |
| { |
| /* One minus to account for the leading empty space. */ |
| value = value ? value - 1 |
| : (isatty (fileno (pp_buffer (context->printer)->stream)) |
| ? get_terminal_width () - 1: INT_MAX); |
| |
| if (value <= 0) |
| value = INT_MAX; |
| |
| context->caret_max_width = value; |
| } |
| |
| /* Default implementation of final_cb. */ |
| |
| static void |
| default_diagnostic_final_cb (diagnostic_context *context) |
| { |
| /* Some of the errors may actually have been warnings. */ |
| if (diagnostic_kind_count (context, DK_WERROR)) |
| { |
| /* -Werror was given. */ |
| if (context->warning_as_error_requested) |
| pp_verbatim (context->printer, |
| _("%s: all warnings being treated as errors"), |
| progname); |
| /* At least one -Werror= was given. */ |
| else |
| pp_verbatim (context->printer, |
| _("%s: some warnings being treated as errors"), |
| progname); |
| pp_newline_and_flush (context->printer); |
| } |
| } |
| |
| /* Initialize the diagnostic message outputting machinery. */ |
| void |
| diagnostic_initialize (diagnostic_context *context, int n_opts) |
| { |
| int i; |
| |
| /* Allocate a basic pretty-printer. Clients will replace this a |
| much more elaborated pretty-printer if they wish. */ |
| context->printer = XNEW (pretty_printer); |
| new (context->printer) pretty_printer (); |
| |
| memset (context->diagnostic_count, 0, sizeof context->diagnostic_count); |
| context->warning_as_error_requested = false; |
| context->n_opts = n_opts; |
| context->classify_diagnostic = XNEWVEC (diagnostic_t, n_opts); |
| for (i = 0; i < n_opts; i++) |
| context->classify_diagnostic[i] = DK_UNSPECIFIED; |
| context->show_caret = false; |
| diagnostic_set_caret_max_width (context, pp_line_cutoff (context->printer)); |
| for (i = 0; i < rich_location::STATICALLY_ALLOCATED_RANGES; i++) |
| context->caret_chars[i] = '^'; |
| context->show_cwe = false; |
| context->path_format = DPF_NONE; |
| context->show_path_depths = false; |
| context->show_option_requested = false; |
| context->abort_on_error = false; |
| context->show_column = false; |
| context->pedantic_errors = false; |
| context->permissive = false; |
| context->opt_permissive = 0; |
| context->fatal_errors = false; |
| context->dc_inhibit_warnings = false; |
| context->dc_warn_system_headers = false; |
| context->max_errors = 0; |
| context->internal_error = NULL; |
| diagnostic_starter (context) = default_diagnostic_starter; |
| context->start_span = default_diagnostic_start_span_fn; |
| diagnostic_finalizer (context) = default_diagnostic_finalizer; |
| context->option_enabled = NULL; |
| context->option_state = NULL; |
| context->option_name = NULL; |
| context->get_option_url = NULL; |
| context->last_location = UNKNOWN_LOCATION; |
| context->last_module = 0; |
| context->x_data = NULL; |
| context->lock = 0; |
| context->inhibit_notes_p = false; |
| context->colorize_source_p = false; |
| context->show_labels_p = false; |
| context->show_line_numbers_p = false; |
| context->min_margin_width = 0; |
| context->show_ruler_p = false; |
| context->parseable_fixits_p = false; |
| context->edit_context_ptr = NULL; |
| context->diagnostic_group_nesting_depth = 0; |
| context->diagnostic_group_emission_count = 0; |
| context->begin_group_cb = NULL; |
| context->end_group_cb = NULL; |
| context->final_cb = default_diagnostic_final_cb; |
| } |
| |
| /* Maybe initialize the color support. We require clients to do this |
| explicitly, since most clients don't want color. When called |
| without a VALUE, it initializes with DIAGNOSTICS_COLOR_DEFAULT. */ |
| |
| void |
| diagnostic_color_init (diagnostic_context *context, int value /*= -1 */) |
| { |
| /* value == -1 is the default value. */ |
| if (value < 0) |
| { |
| /* If DIAGNOSTICS_COLOR_DEFAULT is -1, default to |
| -fdiagnostics-color=auto if GCC_COLORS is in the environment, |
| otherwise default to -fdiagnostics-color=never, for other |
| values default to that |
| -fdiagnostics-color={never,auto,always}. */ |
| if (DIAGNOSTICS_COLOR_DEFAULT == -1) |
| { |
| if (!getenv ("GCC_COLORS")) |
| return; |
| value = DIAGNOSTICS_COLOR_AUTO; |
| } |
| else |
| value = DIAGNOSTICS_COLOR_DEFAULT; |
| } |
| pp_show_color (context->printer) |
| = colorize_init ((diagnostic_color_rule_t) value); |
| } |
| |
| /* Initialize URL support within CONTEXT based on VALUE, handling "auto". */ |
| |
| void |
| diagnostic_urls_init (diagnostic_context *context, int value /*= -1 */) |
| { |
| /* value == -1 is the default value. */ |
| if (value < 0) |
| { |
| /* If DIAGNOSTICS_URLS_DEFAULT is -1, default to |
| -fdiagnostics-urls=auto if GCC_URLS or TERM_URLS is in the |
| environment, otherwise default to -fdiagnostics-urls=never, |
| for other values default to that |
| -fdiagnostics-urls={never,auto,always}. */ |
| if (DIAGNOSTICS_URLS_DEFAULT == -1) |
| { |
| if (!getenv ("GCC_URLS") && !getenv ("TERM_URLS")) |
| return; |
| value = DIAGNOSTICS_URL_AUTO; |
| } |
| else |
| value = DIAGNOSTICS_URLS_DEFAULT; |
| } |
| |
| context->printer->url_format |
| = determine_url_format ((diagnostic_url_rule_t) value); |
| } |
| |
| /* Do any cleaning up required after the last diagnostic is emitted. */ |
| |
| void |
| diagnostic_finish (diagnostic_context *context) |
| { |
| if (context->final_cb) |
| context->final_cb (context); |
| |
| diagnostic_file_cache_fini (); |
| |
| XDELETEVEC (context->classify_diagnostic); |
| context->classify_diagnostic = NULL; |
| |
| /* diagnostic_initialize allocates context->printer using XNEW |
| and placement-new. */ |
| context->printer->~pretty_printer (); |
| XDELETE (context->printer); |
| context->printer = NULL; |
| |
| if (context->edit_context_ptr) |
| { |
| delete context->edit_context_ptr; |
| context->edit_context_ptr = NULL; |
| } |
| } |
| |
| /* Initialize DIAGNOSTIC, where the message MSG has already been |
| translated. */ |
| void |
| diagnostic_set_info_translated (diagnostic_info *diagnostic, const char *msg, |
| va_list *args, rich_location *richloc, |
| diagnostic_t kind) |
| { |
| gcc_assert (richloc); |
| diagnostic->message.err_no = errno; |
| diagnostic->message.args_ptr = args; |
| diagnostic->message.format_spec = msg; |
| diagnostic->message.m_richloc = richloc; |
| diagnostic->richloc = richloc; |
| diagnostic->metadata = NULL; |
| diagnostic->kind = kind; |
| diagnostic->option_index = 0; |
| } |
| |
| /* Initialize DIAGNOSTIC, where the message GMSGID has not yet been |
| translated. */ |
| void |
| diagnostic_set_info (diagnostic_info *diagnostic, const char *gmsgid, |
| va_list *args, rich_location *richloc, |
| diagnostic_t kind) |
| { |
| gcc_assert (richloc); |
| diagnostic_set_info_translated (diagnostic, _(gmsgid), args, richloc, kind); |
| } |
| |
| static const char *const diagnostic_kind_color[] = { |
| #define DEFINE_DIAGNOSTIC_KIND(K, T, C) (C), |
| #include "diagnostic.def" |
| #undef DEFINE_DIAGNOSTIC_KIND |
| NULL |
| }; |
| |
| /* Get a color name for diagnostics of type KIND |
| Result could be NULL. */ |
| |
| const char * |
| diagnostic_get_color_for_kind (diagnostic_t kind) |
| { |
| return diagnostic_kind_color[kind]; |
| } |
| |
| /* Return a formatted line and column ':%line:%column'. Elided if |
| zero. The result is a statically allocated buffer. */ |
| |
| static const char * |
| maybe_line_and_column (int line, int col) |
| { |
| static char result[32]; |
| |
| if (line) |
| { |
| size_t l = snprintf (result, sizeof (result), |
| col ? ":%d:%d" : ":%d", line, col); |
| gcc_checking_assert (l < sizeof (result)); |
| } |
| else |
| result[0] = 0; |
| return result; |
| } |
| |
| /* Return a malloc'd string describing a location e.g. "foo.c:42:10". |
| The caller is responsible for freeing the memory. */ |
| |
| static char * |
| diagnostic_get_location_text (diagnostic_context *context, |
| expanded_location s) |
| { |
| pretty_printer *pp = context->printer; |
| const char *locus_cs = colorize_start (pp_show_color (pp), "locus"); |
| const char *locus_ce = colorize_stop (pp_show_color (pp)); |
| const char *file = s.file ? s.file : progname; |
| int line = strcmp (file, N_("<built-in>")) ? s.line : 0; |
| int col = context->show_column ? s.column : 0; |
| |
| const char *line_col = maybe_line_and_column (line, col); |
| return build_message_string ("%s%s%s:%s", locus_cs, file, |
| line_col, locus_ce); |
| } |
| |
| /* Return a malloc'd string describing a location and the severity of the |
| diagnostic, e.g. "foo.c:42:10: error: ". The caller is responsible for |
| freeing the memory. */ |
| char * |
| diagnostic_build_prefix (diagnostic_context *context, |
| const diagnostic_info *diagnostic) |
| { |
| static const char *const diagnostic_kind_text[] = { |
| #define DEFINE_DIAGNOSTIC_KIND(K, T, C) (T), |
| #include "diagnostic.def" |
| #undef DEFINE_DIAGNOSTIC_KIND |
| "must-not-happen" |
| }; |
| gcc_assert (diagnostic->kind < DK_LAST_DIAGNOSTIC_KIND); |
| |
| const char *text = _(diagnostic_kind_text[diagnostic->kind]); |
| const char *text_cs = "", *text_ce = ""; |
| pretty_printer *pp = context->printer; |
| |
| if (diagnostic_kind_color[diagnostic->kind]) |
| { |
| text_cs = colorize_start (pp_show_color (pp), |
| diagnostic_kind_color[diagnostic->kind]); |
| text_ce = colorize_stop (pp_show_color (pp)); |
| } |
| |
| expanded_location s = diagnostic_expand_location (diagnostic); |
| char *location_text = diagnostic_get_location_text (context, s); |
| |
| char *result = build_message_string ("%s %s%s%s", location_text, |
| text_cs, text, text_ce); |
| free (location_text); |
| return result; |
| } |
| |
| /* Functions at which to stop the backtrace print. It's not |
| particularly helpful to print the callers of these functions. */ |
| |
| static const char * const bt_stop[] = |
| { |
| "main", |
| "toplev::main", |
| "execute_one_pass", |
| "compile_file", |
| }; |
| |
| /* A callback function passed to the backtrace_full function. */ |
| |
| static int |
| bt_callback (void *data, uintptr_t pc, const char *filename, int lineno, |
| const char *function) |
| { |
| int *pcount = (int *) data; |
| |
| /* If we don't have any useful information, don't print |
| anything. */ |
| if (filename == NULL && function == NULL) |
| return 0; |
| |
| /* Skip functions in diagnostic.c. */ |
| if (*pcount == 0 |
| && filename != NULL |
| && strcmp (lbasename (filename), "diagnostic.c") == 0) |
| return 0; |
| |
| /* Print up to 20 functions. We could make this a --param, but |
| since this is only for debugging just use a constant for now. */ |
| if (*pcount >= 20) |
| { |
| /* Returning a non-zero value stops the backtrace. */ |
| return 1; |
| } |
| ++*pcount; |
| |
| char *alc = NULL; |
| if (function != NULL) |
| { |
| char *str = cplus_demangle_v3 (function, |
| (DMGL_VERBOSE | DMGL_ANSI |
| | DMGL_GNU_V3 | DMGL_PARAMS)); |
| if (str != NULL) |
| { |
| alc = str; |
| function = str; |
| } |
| |
| for (size_t i = 0; i < ARRAY_SIZE (bt_stop); ++i) |
| { |
| size_t len = strlen (bt_stop[i]); |
| if (strncmp (function, bt_stop[i], len) == 0 |
| && (function[len] == '\0' || function[len] == '(')) |
| { |
| if (alc != NULL) |
| free (alc); |
| /* Returning a non-zero value stops the backtrace. */ |
| return 1; |
| } |
| } |
| } |
| |
| fprintf (stderr, "0x%lx %s\n\t%s:%d\n", |
| (unsigned long) pc, |
| function == NULL ? "???" : function, |
| filename == NULL ? "???" : filename, |
| lineno); |
| |
| if (alc != NULL) |
| free (alc); |
| |
| return 0; |
| } |
| |
| /* A callback function passed to the backtrace_full function. This is |
| called if backtrace_full has an error. */ |
| |
| static void |
| bt_err_callback (void *data ATTRIBUTE_UNUSED, const char *msg, int errnum) |
| { |
| if (errnum < 0) |
| { |
| /* This means that no debug info was available. Just quietly |
| skip printing backtrace info. */ |
| return; |
| } |
| fprintf (stderr, "%s%s%s\n", msg, errnum == 0 ? "" : ": ", |
| errnum == 0 ? "" : xstrerror (errnum)); |
| } |
| |
| /* Check if we've met the maximum error limit, and if so fatally exit |
| with a message. CONTEXT is the context to check, and FLUSH |
| indicates whether a diagnostic_finish call is needed. */ |
| |
| void |
| diagnostic_check_max_errors (diagnostic_context *context, bool flush) |
| { |
| if (!context->max_errors) |
| return; |
| |
| int count = (diagnostic_kind_count (context, DK_ERROR) |
| + diagnostic_kind_count (context, DK_SORRY) |
| + diagnostic_kind_count (context, DK_WERROR)); |
| |
| if (count >= context->max_errors) |
| { |
| fnotice (stderr, |
| "compilation terminated due to -fmax-errors=%u.\n", |
| context->max_errors); |
| if (flush) |
| diagnostic_finish (context); |
| exit (FATAL_EXIT_CODE); |
| } |
| } |
| |
| /* Take any action which is expected to happen after the diagnostic |
| is written out. This function does not always return. */ |
| void |
| diagnostic_action_after_output (diagnostic_context *context, |
| diagnostic_t diag_kind) |
| { |
| switch (diag_kind) |
| { |
| case DK_DEBUG: |
| case DK_NOTE: |
| case DK_ANACHRONISM: |
| case DK_WARNING: |
| break; |
| |
| case DK_ERROR: |
| case DK_SORRY: |
| if (context->abort_on_error) |
| real_abort (); |
| if (context->fatal_errors) |
| { |
| fnotice (stderr, "compilation terminated due to -Wfatal-errors.\n"); |
| diagnostic_finish (context); |
| exit (FATAL_EXIT_CODE); |
| } |
| break; |
| |
| case DK_ICE: |
| case DK_ICE_NOBT: |
| { |
| struct backtrace_state *state = NULL; |
| if (diag_kind == DK_ICE) |
| state = backtrace_create_state (NULL, 0, bt_err_callback, NULL); |
| int count = 0; |
| if (state != NULL) |
| backtrace_full (state, 2, bt_callback, bt_err_callback, |
| (void *) &count); |
| |
| if (context->abort_on_error) |
| real_abort (); |
| |
| fnotice (stderr, "Please submit a full bug report,\n" |
| "with preprocessed source if appropriate.\n"); |
| if (count > 0) |
| fnotice (stderr, |
| ("Please include the complete backtrace " |
| "with any bug report.\n")); |
| fnotice (stderr, "See %s for instructions.\n", bug_report_url); |
| |
| exit (ICE_EXIT_CODE); |
| } |
| |
| case DK_FATAL: |
| if (context->abort_on_error) |
| real_abort (); |
| diagnostic_finish (context); |
| fnotice (stderr, "compilation terminated.\n"); |
| exit (FATAL_EXIT_CODE); |
| |
| default: |
| gcc_unreachable (); |
| } |
| } |
| |
| /* True if the last module or file in which a diagnostic was reported is |
| different from the current one. */ |
| |
| static bool |
| last_module_changed_p (diagnostic_context *context, |
| const line_map_ordinary *map) |
| { |
| return context->last_module != map; |
| } |
| |
| /* Remember the current module or file as being the last one in which we |
| report a diagnostic. */ |
| |
| static void |
| set_last_module (diagnostic_context *context, const line_map_ordinary *map) |
| { |
| context->last_module = map; |
| } |
| |
| void |
| diagnostic_report_current_module (diagnostic_context *context, location_t where) |
| { |
| const line_map_ordinary *map = NULL; |
| |
| if (pp_needs_newline (context->printer)) |
| { |
| pp_newline (context->printer); |
| pp_needs_newline (context->printer) = false; |
| } |
| |
| if (where <= BUILTINS_LOCATION) |
| return; |
| |
| linemap_resolve_location (line_table, where, |
| LRK_MACRO_DEFINITION_LOCATION, |
| &map); |
| |
| if (map && last_module_changed_p (context, map)) |
| { |
| set_last_module (context, map); |
| if (! MAIN_FILE_P (map)) |
| { |
| bool first = true; |
| do |
| { |
| where = linemap_included_from (map); |
| map = linemap_included_from_linemap (line_table, map); |
| const char *line_col |
| = maybe_line_and_column (SOURCE_LINE (map, where), |
| first && context->show_column |
| ? SOURCE_COLUMN (map, where) : 0); |
| static const char *const msgs[] = |
| { |
| N_("In file included from"), |
| N_(" from"), |
| }; |
| unsigned index = !first; |
| pp_verbatim (context->printer, "%s%s %r%s%s%R", |
| first ? "" : ",\n", _(msgs[index]), |
| "locus", LINEMAP_FILE (map), line_col); |
| first = false; |
| } |
| while (! MAIN_FILE_P (map)); |
| pp_verbatim (context->printer, ":"); |
| pp_newline (context->printer); |
| } |
| } |
| } |
| |
| /* If DIAGNOSTIC has a diagnostic_path and CONTEXT supports printing paths, |
| print the path. */ |
| |
| void |
| diagnostic_show_any_path (diagnostic_context *context, |
| diagnostic_info *diagnostic) |
| { |
| const diagnostic_path *path = diagnostic->richloc->get_path (); |
| if (!path) |
| return; |
| |
| if (context->print_path) |
| context->print_path (context, path); |
| } |
| |
| /* Return true if the events in this path involve more than one |
| function, or false if it is purely intraprocedural. */ |
| |
| bool |
| diagnostic_path::interprocedural_p () const |
| { |
| const unsigned num = num_events (); |
| for (unsigned i = 0; i < num; i++) |
| { |
| if (get_event (i).get_fndecl () != get_event (0).get_fndecl ()) |
| return true; |
| if (get_event (i).get_stack_depth () != get_event (0).get_stack_depth ()) |
| return true; |
| } |
| return false; |
| } |
| |
| void |
| default_diagnostic_starter (diagnostic_context *context, |
| diagnostic_info *diagnostic) |
| { |
| diagnostic_report_current_module (context, diagnostic_location (diagnostic)); |
| pp_set_prefix (context->printer, diagnostic_build_prefix (context, |
| diagnostic)); |
| } |
| |
| void |
| default_diagnostic_start_span_fn (diagnostic_context *context, |
| expanded_location exploc) |
| { |
| char *text = diagnostic_get_location_text (context, exploc); |
| pp_string (context->printer, text); |
| free (text); |
| pp_newline (context->printer); |
| } |
| |
| void |
| default_diagnostic_finalizer (diagnostic_context *context, |
| diagnostic_info *diagnostic, |
| diagnostic_t) |
| { |
| char *saved_prefix = pp_take_prefix (context->printer); |
| pp_set_prefix (context->printer, NULL); |
| pp_newline (context->printer); |
| diagnostic_show_locus (context, diagnostic->richloc, diagnostic->kind); |
| pp_set_prefix (context->printer, saved_prefix); |
| pp_flush (context->printer); |
| } |
| |
| /* Interface to specify diagnostic kind overrides. Returns the |
| previous setting, or DK_UNSPECIFIED if the parameters are out of |
| range. If OPTION_INDEX is zero, the new setting is for all the |
| diagnostics. */ |
| diagnostic_t |
| diagnostic_classify_diagnostic (diagnostic_context *context, |
| int option_index, |
| diagnostic_t new_kind, |
| location_t where) |
| { |
| diagnostic_t old_kind; |
| |
| if (option_index < 0 |
| || option_index >= context->n_opts |
| || new_kind >= DK_LAST_DIAGNOSTIC_KIND) |
| return DK_UNSPECIFIED; |
| |
| old_kind = context->classify_diagnostic[option_index]; |
| |
| /* Handle pragmas separately, since we need to keep track of *where* |
| the pragmas were. */ |
| if (where != UNKNOWN_LOCATION) |
| { |
| int i; |
| |
| /* Record the command-line status, so we can reset it back on DK_POP. */ |
| if (old_kind == DK_UNSPECIFIED) |
| { |
| old_kind = !context->option_enabled (option_index, |
| context->lang_mask, |
| context->option_state) |
| ? DK_IGNORED : (context->warning_as_error_requested |
| ? DK_ERROR : DK_WARNING); |
| context->classify_diagnostic[option_index] = old_kind; |
| } |
| |
| for (i = context->n_classification_history - 1; i >= 0; i --) |
| if (context->classification_history[i].option == option_index) |
| { |
| old_kind = context->classification_history[i].kind; |
| break; |
| } |
| |
| i = context->n_classification_history; |
| context->classification_history = |
| (diagnostic_classification_change_t *) xrealloc (context->classification_history, (i + 1) |
| * sizeof (diagnostic_classification_change_t)); |
| context->classification_history[i].location = where; |
| context->classification_history[i].option = option_index; |
| context->classification_history[i].kind = new_kind; |
| context->n_classification_history ++; |
| } |
| else |
| context->classify_diagnostic[option_index] = new_kind; |
| |
| return old_kind; |
| } |
| |
| /* Save all diagnostic classifications in a stack. */ |
| void |
| diagnostic_push_diagnostics (diagnostic_context *context, location_t where ATTRIBUTE_UNUSED) |
| { |
| context->push_list = (int *) xrealloc (context->push_list, (context->n_push + 1) * sizeof (int)); |
| context->push_list[context->n_push ++] = context->n_classification_history; |
| } |
| |
| /* Restore the topmost classification set off the stack. If the stack |
| is empty, revert to the state based on command line parameters. */ |
| void |
| diagnostic_pop_diagnostics (diagnostic_context *context, location_t where) |
| { |
| int jump_to; |
| int i; |
| |
| if (context->n_push) |
| jump_to = context->push_list [-- context->n_push]; |
| else |
| jump_to = 0; |
| |
| i = context->n_classification_history; |
| context->classification_history = |
| (diagnostic_classification_change_t *) xrealloc (context->classification_history, (i + 1) |
| * sizeof (diagnostic_classification_change_t)); |
| context->classification_history[i].location = where; |
| context->classification_history[i].option = jump_to; |
| context->classification_history[i].kind = DK_POP; |
| context->n_classification_history ++; |
| } |
| |
| /* Helper function for print_parseable_fixits. Print TEXT to PP, obeying the |
| escaping rules for -fdiagnostics-parseable-fixits. */ |
| |
| static void |
| print_escaped_string (pretty_printer *pp, const char *text) |
| { |
| gcc_assert (pp); |
| gcc_assert (text); |
| |
| pp_character (pp, '"'); |
| for (const char *ch = text; *ch; ch++) |
| { |
| switch (*ch) |
| { |
| case '\\': |
| /* Escape backslash as two backslashes. */ |
| pp_string (pp, "\\\\"); |
| break; |
| case '\t': |
| /* Escape tab as "\t". */ |
| pp_string (pp, "\\t"); |
| break; |
| case '\n': |
| /* Escape newline as "\n". */ |
| pp_string (pp, "\\n"); |
| break; |
| case '"': |
| /* Escape doublequotes as \". */ |
| pp_string (pp, "\\\""); |
| break; |
| default: |
| if (ISPRINT (*ch)) |
| pp_character (pp, *ch); |
| else |
| /* Use octal for non-printable chars. */ |
| { |
| unsigned char c = (*ch & 0xff); |
| pp_printf (pp, "\\%o%o%o", (c / 64), (c / 8) & 007, c & 007); |
| } |
| break; |
| } |
| } |
| pp_character (pp, '"'); |
| } |
| |
| /* Implementation of -fdiagnostics-parseable-fixits. Print a |
| machine-parseable version of all fixits in RICHLOC to PP. */ |
| |
| static void |
| print_parseable_fixits (pretty_printer *pp, rich_location *richloc) |
| { |
| gcc_assert (pp); |
| gcc_assert (richloc); |
| |
| char *saved_prefix = pp_take_prefix (pp); |
| pp_set_prefix (pp, NULL); |
| |
| for (unsigned i = 0; i < richloc->get_num_fixit_hints (); i++) |
| { |
| const fixit_hint *hint = richloc->get_fixit_hint (i); |
| location_t start_loc = hint->get_start_loc (); |
| expanded_location start_exploc = expand_location (start_loc); |
| pp_string (pp, "fix-it:"); |
| print_escaped_string (pp, start_exploc.file); |
| /* For compatibility with clang, print as a half-open range. */ |
| location_t next_loc = hint->get_next_loc (); |
| expanded_location next_exploc = expand_location (next_loc); |
| pp_printf (pp, ":{%i:%i-%i:%i}:", |
| start_exploc.line, start_exploc.column, |
| next_exploc.line, next_exploc.column); |
| print_escaped_string (pp, hint->get_string ()); |
| pp_newline (pp); |
| } |
| |
| pp_set_prefix (pp, saved_prefix); |
| } |
| |
| /* Update the diag_class of DIAGNOSTIC based on its location |
| relative to any |
| #pragma GCC diagnostic |
| directives recorded within CONTEXT. |
| |
| Return the new diag_class of DIAGNOSTIC if it was updated, or |
| DK_UNSPECIFIED otherwise. */ |
| |
| static diagnostic_t |
| update_effective_level_from_pragmas (diagnostic_context *context, |
| diagnostic_info *diagnostic) |
| { |
| diagnostic_t diag_class = DK_UNSPECIFIED; |
| |
| if (context->n_classification_history > 0) |
| { |
| location_t location = diagnostic_location (diagnostic); |
| |
| /* FIXME: Stupid search. Optimize later. */ |
| for (int i = context->n_classification_history - 1; i >= 0; i --) |
| { |
| if (linemap_location_before_p |
| (line_table, |
| context->classification_history[i].location, |
| location)) |
| { |
| if (context->classification_history[i].kind == (int) DK_POP) |
| { |
| i = context->classification_history[i].option; |
| continue; |
| } |
| int option = context->classification_history[i].option; |
| /* The option 0 is for all the diagnostics. */ |
| if (option == 0 || option == diagnostic->option_index) |
| { |
| diag_class = context->classification_history[i].kind; |
| if (diag_class != DK_UNSPECIFIED) |
| diagnostic->kind = diag_class; |
| break; |
| } |
| } |
| } |
| } |
| |
| return diag_class; |
| } |
| |
| /* Generate a URL string describing CWE. The caller is responsible for |
| freeing the string. */ |
| |
| static char * |
| get_cwe_url (int cwe) |
| { |
| return xasprintf ("https://cwe.mitre.org/data/definitions/%i.html", cwe); |
| } |
| |
| /* If DIAGNOSTIC has a CWE identifier, print it. |
| |
| For example, if the diagnostic metadata associates it with CWE-119, |
| " [CWE-119]" will be printed, suitably colorized, and with a URL of a |
| description of the security issue. */ |
| |
| static void |
| print_any_cwe (diagnostic_context *context, |
| const diagnostic_info *diagnostic) |
| { |
| if (diagnostic->metadata == NULL) |
| return; |
| |
| int cwe = diagnostic->metadata->get_cwe (); |
| if (cwe) |
| { |
| pretty_printer *pp = context->printer; |
| char *saved_prefix = pp_take_prefix (context->printer); |
| pp_string (pp, " ["); |
| pp_string (pp, colorize_start (pp_show_color (pp), |
| diagnostic_kind_color[diagnostic->kind])); |
| if (pp->url_format != URL_FORMAT_NONE) |
| { |
| char *cwe_url = get_cwe_url (cwe); |
| pp_begin_url (pp, cwe_url); |
| free (cwe_url); |
| } |
| pp_printf (pp, "CWE-%i", cwe); |
| pp_set_prefix (context->printer, saved_prefix); |
| if (pp->url_format != URL_FORMAT_NONE) |
| pp_end_url (pp); |
| pp_string (pp, colorize_stop (pp_show_color (pp))); |
| pp_character (pp, ']'); |
| } |
| } |
| |
| /* Print any metadata about the option used to control DIAGNOSTIC to CONTEXT's |
| printer, e.g. " [-Werror=uninitialized]". |
| Subroutine of diagnostic_report_diagnostic. */ |
| |
| static void |
| print_option_information (diagnostic_context *context, |
| const diagnostic_info *diagnostic, |
| diagnostic_t orig_diag_kind) |
| { |
| char *option_text; |
| |
| option_text = context->option_name (context, diagnostic->option_index, |
| orig_diag_kind, diagnostic->kind); |
| |
| if (option_text) |
| { |
| char *option_url = NULL; |
| if (context->get_option_url |
| && context->printer->url_format != URL_FORMAT_NONE) |
| option_url = context->get_option_url (context, |
| diagnostic->option_index); |
| pretty_printer *pp = context->printer; |
| pp_string (pp, " ["); |
| pp_string (pp, colorize_start (pp_show_color (pp), |
| diagnostic_kind_color[diagnostic->kind])); |
| if (option_url) |
| pp_begin_url (pp, option_url); |
| pp_string (pp, option_text); |
| if (option_url) |
| { |
| pp_end_url (pp); |
| free (option_url); |
| } |
| pp_string (pp, colorize_stop (pp_show_color (pp))); |
| pp_character (pp, ']'); |
| free (option_text); |
| } |
| } |
| |
| /* Report a diagnostic message (an error or a warning) as specified by |
| DC. This function is *the* subroutine in terms of which front-ends |
| should implement their specific diagnostic handling modules. The |
| front-end independent format specifiers are exactly those described |
| in the documentation of output_format. |
| Return true if a diagnostic was printed, false otherwise. */ |
| |
| bool |
| diagnostic_report_diagnostic (diagnostic_context *context, |
| diagnostic_info *diagnostic) |
| { |
| location_t location = diagnostic_location (diagnostic); |
| diagnostic_t orig_diag_kind = diagnostic->kind; |
| |
| /* Give preference to being able to inhibit warnings, before they |
| get reclassified to something else. */ |
| if ((diagnostic->kind == DK_WARNING || diagnostic->kind == DK_PEDWARN) |
| && !diagnostic_report_warnings_p (context, location)) |
| return false; |
| |
| if (diagnostic->kind == DK_PEDWARN) |
| { |
| diagnostic->kind = pedantic_warning_kind (context); |
| /* We do this to avoid giving the message for -pedantic-errors. */ |
| orig_diag_kind = diagnostic->kind; |
| } |
| |
| if (diagnostic->kind == DK_NOTE && context->inhibit_notes_p) |
| return false; |
| |
| if (context->lock > 0) |
| { |
| /* If we're reporting an ICE in the middle of some other error, |
| try to flush out the previous error, then let this one |
| through. Don't do this more than once. */ |
| if ((diagnostic->kind == DK_ICE || diagnostic->kind == DK_ICE_NOBT) |
| && context->lock == 1) |
| pp_newline_and_flush (context->printer); |
| else |
| error_recursion (context); |
| } |
| |
| /* If the user requested that warnings be treated as errors, so be |
| it. Note that we do this before the next block so that |
| individual warnings can be overridden back to warnings with |
| -Wno-error=*. */ |
| if (context->warning_as_error_requested |
| && diagnostic->kind == DK_WARNING) |
| diagnostic->kind = DK_ERROR; |
| |
| if (diagnostic->option_index |
| && diagnostic->option_index != permissive_error_option (context)) |
| { |
| /* This tests if the user provided the appropriate -Wfoo or |
| -Wno-foo option. */ |
| if (! context->option_enabled (diagnostic->option_index, |
| context->lang_mask, |
| context->option_state)) |
| return false; |
| |
| /* This tests for #pragma diagnostic changes. */ |
| diagnostic_t diag_class |
| = update_effective_level_from_pragmas (context, diagnostic); |
| |
| /* This tests if the user provided the appropriate -Werror=foo |
| option. */ |
| if (diag_class == DK_UNSPECIFIED |
| && (context->classify_diagnostic[diagnostic->option_index] |
| != DK_UNSPECIFIED)) |
| diagnostic->kind |
| = context->classify_diagnostic[diagnostic->option_index]; |
| |
| /* This allows for future extensions, like temporarily disabling |
| warnings for ranges of source code. */ |
| if (diagnostic->kind == DK_IGNORED) |
| return false; |
| } |
| |
| if (diagnostic->kind != DK_NOTE) |
| diagnostic_check_max_errors (context); |
| |
| context->lock++; |
| |
| if (diagnostic->kind == DK_ICE || diagnostic->kind == DK_ICE_NOBT) |
| { |
| /* When not checking, ICEs are converted to fatal errors when an |
| error has already occurred. This is counteracted by |
| abort_on_error. */ |
| if (!CHECKING_P |
| && (diagnostic_kind_count (context, DK_ERROR) > 0 |
| || diagnostic_kind_count (context, DK_SORRY) > 0) |
| && !context->abort_on_error) |
| { |
| expanded_location s |
| = expand_location (diagnostic_location (diagnostic)); |
| fnotice (stderr, "%s:%d: confused by earlier errors, bailing out\n", |
| s.file, s.line); |
| exit (ICE_EXIT_CODE); |
| } |
| if (context->internal_error) |
| (*context->internal_error) (context, |
| diagnostic->message.format_spec, |
| diagnostic->message.args_ptr); |
| } |
| if (diagnostic->kind == DK_ERROR && orig_diag_kind == DK_WARNING) |
| ++diagnostic_kind_count (context, DK_WERROR); |
| else |
| ++diagnostic_kind_count (context, diagnostic->kind); |
| |
| /* Is this the initial diagnostic within the stack of groups? */ |
| if (context->diagnostic_group_emission_count == 0) |
| { |
| if (context->begin_group_cb) |
| context->begin_group_cb (context); |
| } |
| context->diagnostic_group_emission_count++; |
| |
| diagnostic->message.x_data = &diagnostic->x_data; |
| diagnostic->x_data = NULL; |
| pp_format (context->printer, &diagnostic->message); |
| (*diagnostic_starter (context)) (context, diagnostic); |
| pp_output_formatted_text (context->printer); |
| if (context->show_cwe) |
| print_any_cwe (context, diagnostic); |
| if (context->show_option_requested) |
| print_option_information (context, diagnostic, orig_diag_kind); |
| (*diagnostic_finalizer (context)) (context, diagnostic, orig_diag_kind); |
| if (context->parseable_fixits_p) |
| { |
| print_parseable_fixits (context->printer, diagnostic->richloc); |
| pp_flush (context->printer); |
| } |
| diagnostic_action_after_output (context, diagnostic->kind); |
| diagnostic->x_data = NULL; |
| |
| if (context->edit_context_ptr) |
| if (diagnostic->richloc->fixits_can_be_auto_applied_p ()) |
| context->edit_context_ptr->add_fixits (diagnostic->richloc); |
| |
| context->lock--; |
| |
| diagnostic_show_any_path (context, diagnostic); |
| |
| return true; |
| } |
| |
| /* Get the number of digits in the decimal representation of VALUE. */ |
| |
| int |
| num_digits (int value) |
| { |
| /* Perhaps simpler to use log10 for this, but doing it this way avoids |
| using floating point. */ |
| gcc_assert (value >= 0); |
| |
| if (value == 0) |
| return 1; |
| |
| int digits = 0; |
| while (value > 0) |
| { |
| digits++; |
| value /= 10; |
| } |
| return digits; |
| } |
| |
| /* Given a partial pathname as input, return another pathname that |
| shares no directory elements with the pathname of __FILE__. This |
| is used by fancy_abort() to print `Internal compiler error in expr.c' |
| instead of `Internal compiler error in ../../GCC/gcc/expr.c'. */ |
| |
| const char * |
| trim_filename (const char *name) |
| { |
| static const char this_file[] = __FILE__; |
| const char *p = name, *q = this_file; |
| |
| /* First skip any "../" in each filename. This allows us to give a proper |
| reference to a file in a subdirectory. */ |
| while (p[0] == '.' && p[1] == '.' && IS_DIR_SEPARATOR (p[2])) |
| p += 3; |
| |
| while (q[0] == '.' && q[1] == '.' && IS_DIR_SEPARATOR (q[2])) |
| q += 3; |
| |
| /* Now skip any parts the two filenames have in common. */ |
| while (*p == *q && *p != 0 && *q != 0) |
| p++, q++; |
| |
| /* Now go backwards until the previous directory separator. */ |
| while (p > name && !IS_DIR_SEPARATOR (p[-1])) |
| p--; |
| |
| return p; |
| } |
| |
| /* Standard error reporting routines in increasing order of severity. |
| All of these take arguments like printf. */ |
| |
| /* Text to be emitted verbatim to the error message stream; this |
| produces no prefix and disables line-wrapping. Use rarely. */ |
| void |
| verbatim (const char *gmsgid, ...) |
| { |
| text_info text; |
| va_list ap; |
| |
| va_start (ap, gmsgid); |
| text.err_no = errno; |
| text.args_ptr = ≈ |
| text.format_spec = _(gmsgid); |
| text.x_data = NULL; |
| pp_format_verbatim (global_dc->printer, &text); |
| pp_newline_and_flush (global_dc->printer); |
| va_end (ap); |
| } |
| |
| /* Add a note with text GMSGID and with LOCATION to the diagnostic CONTEXT. */ |
| void |
| diagnostic_append_note (diagnostic_context *context, |
| location_t location, |
| const char * gmsgid, ...) |
| { |
| diagnostic_info diagnostic; |
| va_list ap; |
| rich_location richloc (line_table, location); |
| |
| va_start (ap, gmsgid); |
| diagnostic_set_info (&diagnostic, gmsgid, &ap, &richloc, DK_NOTE); |
| if (context->inhibit_notes_p) |
| { |
| va_end (ap); |
| return; |
| } |
| char *saved_prefix = pp_take_prefix (context->printer); |
| pp_set_prefix (context->printer, |
| diagnostic_build_prefix (context, &diagnostic)); |
| pp_format (context->printer, &diagnostic.message); |
| pp_output_formatted_text (context->printer); |
| pp_destroy_prefix (context->printer); |
| pp_set_prefix (context->printer, saved_prefix); |
| pp_newline (context->printer); |
| diagnostic_show_locus (context, &richloc, DK_NOTE); |
| va_end (ap); |
| } |
| |
| /* Implement emit_diagnostic, inform, warning, warning_at, pedwarn, |
| permerror, error, error_at, error_at, sorry, fatal_error, internal_error, |
| and internal_error_no_backtrace, as documented and defined below. */ |
| static bool |
| diagnostic_impl (rich_location *richloc, const diagnostic_metadata *metadata, |
| int opt, const char *gmsgid, |
| va_list *ap, diagnostic_t kind) |
| { |
| diagnostic_info diagnostic; |
| if (kind == DK_PERMERROR) |
| { |
| diagnostic_set_info (&diagnostic, gmsgid, ap, richloc, |
| permissive_error_kind (global_dc)); |
| diagnostic.option_index = permissive_error_option (global_dc); |
| } |
| else |
| { |
| diagnostic_set_info (&diagnostic, gmsgid, ap, richloc, kind); |
| if (kind == DK_WARNING || kind == DK_PEDWARN) |
| diagnostic.option_index = opt; |
| } |
| diagnostic.metadata = metadata; |
| return diagnostic_report_diagnostic (global_dc, &diagnostic); |
| } |
| |
| /* Implement inform_n, warning_n, and error_n, as documented and |
| defined below. */ |
| static bool |
| diagnostic_n_impl (rich_location *richloc, const diagnostic_metadata *metadata, |
| int opt, unsigned HOST_WIDE_INT n, |
| const char *singular_gmsgid, |
| const char *plural_gmsgid, |
| va_list *ap, diagnostic_t kind) |
| { |
| diagnostic_info diagnostic; |
| unsigned long gtn; |
| |
| if (sizeof n <= sizeof gtn) |
| gtn = n; |
| else |
| /* Use the largest number ngettext can handle, otherwise |
| preserve the six least significant decimal digits for |
| languages where the plural form depends on them. */ |
| gtn = n <= ULONG_MAX ? n : n % 1000000LU + 1000000LU; |
| |
| const char *text = ngettext (singular_gmsgid, plural_gmsgid, gtn); |
| diagnostic_set_info_translated (&diagnostic, text, ap, richloc, kind); |
| if (kind == DK_WARNING) |
| diagnostic.option_index = opt; |
| diagnostic.metadata = metadata; |
| return diagnostic_report_diagnostic (global_dc, &diagnostic); |
| } |
| |
| /* Wrapper around diagnostic_impl taking a variable argument list. */ |
| |
| bool |
| emit_diagnostic (diagnostic_t kind, location_t location, int opt, |
| const char *gmsgid, ...) |
| { |
| auto_diagnostic_group d; |
| va_list ap; |
| va_start (ap, gmsgid); |
| rich_location richloc (line_table, location); |
| bool ret = diagnostic_impl (&richloc, NULL, opt, gmsgid, &ap, kind); |
| va_end (ap); |
| return ret; |
| } |
| |
| /* As above, but for rich_location *. */ |
| |
| bool |
| emit_diagnostic (diagnostic_t kind, rich_location *richloc, int opt, |
| const char *gmsgid, ...) |
| { |
| auto_diagnostic_group d; |
| va_list ap; |
| va_start (ap, gmsgid); |
| bool ret = diagnostic_impl (richloc, NULL, opt, gmsgid, &ap, kind); |
| va_end (ap); |
| return ret; |
| } |
| |
| /* Wrapper around diagnostic_impl taking a va_list parameter. */ |
| |
| bool |
| emit_diagnostic_valist (diagnostic_t kind, location_t location, int opt, |
| const char *gmsgid, va_list *ap) |
| { |
| rich_location richloc (line_table, location); |
| return diagnostic_impl (&richloc, NULL, opt, gmsgid, ap, kind); |
| } |
| |
| /* An informative note at LOCATION. Use this for additional details on an error |
| message. */ |
| void |
| inform (location_t location, const char *gmsgid, ...) |
| { |
| auto_diagnostic_group d; |
| va_list ap; |
| va_start (ap, gmsgid); |
| rich_location richloc (line_table, location); |
| diagnostic_impl (&richloc, NULL, -1, gmsgid, &ap, DK_NOTE); |
| va_end (ap); |
| } |
| |
| /* Same as "inform" above, but at RICHLOC. */ |
| void |
| inform (rich_location *richloc, const char *gmsgid, ...) |
| { |
| gcc_assert (richloc); |
| |
| auto_diagnostic_group d; |
| va_list ap; |
| va_start (ap, gmsgid); |
| diagnostic_impl (richloc, NULL, -1, gmsgid, &ap, DK_NOTE); |
| va_end (ap); |
| } |
| |
| /* An informative note at LOCATION. Use this for additional details on an |
| error message. */ |
| void |
| inform_n (location_t location, unsigned HOST_WIDE_INT n, |
| const char *singular_gmsgid, const char *plural_gmsgid, ...) |
| { |
| va_list ap; |
| va_start (ap, plural_gmsgid); |
| auto_diagnostic_group d; |
| rich_location richloc (line_table, location); |
| diagnostic_n_impl (&richloc, NULL, -1, n, singular_gmsgid, plural_gmsgid, |
| &ap, DK_NOTE); |
| va_end (ap); |
| } |
| |
| /* A warning at INPUT_LOCATION. Use this for code which is correct according |
| to the relevant language specification but is likely to be buggy anyway. |
| Returns true if the warning was printed, false if it was inhibited. */ |
| bool |
| warning (int opt, const char *gmsgid, ...) |
| { |
| auto_diagnostic_group d; |
| va_list ap; |
| va_start (ap, gmsgid); |
| rich_location richloc (line_table, input_location); |
| bool ret = diagnostic_impl (&richloc, NULL, opt, gmsgid, &ap, DK_WARNING); |
| va_end (ap); |
| return ret; |
| } |
| |
| /* A warning at LOCATION. Use this for code which is correct according to the |
| relevant language specification but is likely to be buggy anyway. |
| Returns true if the warning was printed, false if it was inhibited. */ |
| |
| bool |
| warning_at (location_t location, int opt, const char *gmsgid, ...) |
| { |
| auto_diagnostic_group d; |
| va_list ap; |
| va_start (ap, gmsgid); |
| rich_location richloc (line_table, location); |
| bool ret = diagnostic_impl (&richloc, NULL, opt, gmsgid, &ap, DK_WARNING); |
| va_end (ap); |
| return ret; |
| } |
| |
| /* Same as "warning at" above, but using RICHLOC. */ |
| |
| bool |
| warning_at (rich_location *richloc, int opt, const char *gmsgid, ...) |
| { |
| gcc_assert (richloc); |
| |
| auto_diagnostic_group d; |
| va_list ap; |
| va_start (ap, gmsgid); |
| bool ret = diagnostic_impl (richloc, NULL, opt, gmsgid, &ap, DK_WARNING); |
| va_end (ap); |
| return ret; |
| } |
| |
| /* Same as "warning at" above, but using METADATA. */ |
| |
| bool |
| warning_meta (rich_location *richloc, |
| const diagnostic_metadata &metadata, |
| int opt, const char *gmsgid, ...) |
| { |
| gcc_assert (richloc); |
| |
| auto_diagnostic_group d; |
| va_list ap; |
| va_start (ap, gmsgid); |
| bool ret |
| = diagnostic_impl (richloc, &metadata, opt, gmsgid, &ap, |
| DK_WARNING); |
| va_end (ap); |
| return ret; |
| } |
| |
| /* Same as warning_n plural variant below, but using RICHLOC. */ |
| |
| bool |
| warning_n (rich_location *richloc, int opt, unsigned HOST_WIDE_INT n, |
| const char *singular_gmsgid, const char *plural_gmsgid, ...) |
| { |
| gcc_assert (richloc); |
| |
| auto_diagnostic_group d; |
| va_list ap; |
| va_start (ap, plural_gmsgid); |
| bool ret = diagnostic_n_impl (richloc, NULL, opt, n, |
| singular_gmsgid, plural_gmsgid, |
| &ap, DK_WARNING); |
| va_end (ap); |
| return ret; |
| } |
| |
| /* A warning at LOCATION. Use this for code which is correct according to the |
| relevant language specification but is likely to be buggy anyway. |
| Returns true if the warning was printed, false if it was inhibited. */ |
| |
| bool |
| warning_n (location_t location, int opt, unsigned HOST_WIDE_INT n, |
| const char *singular_gmsgid, const char *plural_gmsgid, ...) |
| { |
| auto_diagnostic_group d; |
| va_list ap; |
| va_start (ap, plural_gmsgid); |
| rich_location richloc (line_table, location); |
| bool ret = diagnostic_n_impl (&richloc, NULL, opt, n, |
| singular_gmsgid, plural_gmsgid, |
| &ap, DK_WARNING); |
| va_end (ap); |
| return ret; |
| } |
| |
| /* A "pedantic" warning at LOCATION: issues a warning unless |
| -pedantic-errors was given on the command line, in which case it |
| issues an error. Use this for diagnostics required by the relevant |
| language standard, if you have chosen not to make them errors. |
| |
| Note that these diagnostics are issued independent of the setting |
| of the -Wpedantic command-line switch. To get a warning enabled |
| only with that switch, use either "if (pedantic) pedwarn |
| (OPT_Wpedantic,...)" or just "pedwarn (OPT_Wpedantic,..)". To get a |
| pedwarn independently of the -Wpedantic switch use "pedwarn (0,...)". |
| |
| Returns true if the warning was printed, false if it was inhibited. */ |
| |
| bool |
| pedwarn (location_t location, int opt, const char *gmsgid, ...) |
| { |
| auto_diagnostic_group d; |
| va_list ap; |
| va_start (ap, gmsgid); |
| rich_location richloc (line_table, location); |
| bool ret = diagnostic_impl (&richloc, NULL, opt, gmsgid, &ap, DK_PEDWARN); |
| va_end (ap); |
| return ret; |
| } |
| |
| /* Same as pedwarn above, but using RICHLOC. */ |
| |
| bool |
| pedwarn (rich_location *richloc, int opt, const char *gmsgid, ...) |
| { |
| gcc_assert (richloc); |
| |
| auto_diagnostic_group d; |
| va_list ap; |
| va_start (ap, gmsgid); |
| bool ret = diagnostic_impl (richloc, NULL, opt, gmsgid, &ap, DK_PEDWARN); |
| va_end (ap); |
| return ret; |
| } |
| |
| /* A "permissive" error at LOCATION: issues an error unless |
| -fpermissive was given on the command line, in which case it issues |
| a warning. Use this for things that really should be errors but we |
| want to support legacy code. |
| |
| Returns true if the warning was printed, false if it was inhibited. */ |
| |
| bool |
| permerror (location_t location, const char *gmsgid, ...) |
| { |
| auto_diagnostic_group d; |
| va_list ap; |
| va_start (ap, gmsgid); |
| rich_location richloc (line_table, location); |
| bool ret = diagnostic_impl (&richloc, NULL, -1, gmsgid, &ap, DK_PERMERROR); |
| va_end (ap); |
| return ret; |
| } |
| |
| /* Same as "permerror" above, but at RICHLOC. */ |
| |
| bool |
| permerror (rich_location *richloc, const char *gmsgid, ...) |
| { |
| gcc_assert (richloc); |
| |
| auto_diagnostic_group d; |
| va_list ap; |
| va_start (ap, gmsgid); |
| bool ret = diagnostic_impl (richloc, NULL, -1, gmsgid, &ap, DK_PERMERROR); |
| va_end (ap); |
| return ret; |
| } |
| |
| /* A hard error: the code is definitely ill-formed, and an object file |
| will not be produced. */ |
| void |
| error (const char *gmsgid, ...) |
| { |
| auto_diagnostic_group d; |
| va_list ap; |
| va_start (ap, gmsgid); |
| rich_location richloc (line_table, input_location); |
| diagnostic_impl (&richloc, NULL, -1, gmsgid, &ap, DK_ERROR); |
| va_end (ap); |
| } |
| |
| /* A hard error: the code is definitely ill-formed, and an object file |
| will not be produced. */ |
| void |
| error_n (location_t location, unsigned HOST_WIDE_INT n, |
| const char *singular_gmsgid, const char *plural_gmsgid, ...) |
| { |
| auto_diagnostic_group d; |
| va_list ap; |
| va_start (ap, plural_gmsgid); |
| rich_location richloc (line_table, location); |
| diagnostic_n_impl (&richloc, NULL, -1, n, singular_gmsgid, plural_gmsgid, |
| &ap, DK_ERROR); |
| va_end (ap); |
| } |
| |
| /* Same as above, but use location LOC instead of input_location. */ |
| void |
| error_at (location_t loc, const char *gmsgid, ...) |
| { |
| auto_diagnostic_group d; |
| va_list ap; |
| va_start (ap, gmsgid); |
| rich_location richloc (line_table, loc); |
| diagnostic_impl (&richloc, NULL, -1, gmsgid, &ap, DK_ERROR); |
| va_end (ap); |
| } |
| |
| /* Same as above, but use RICH_LOC. */ |
| |
| void |
| error_at (rich_location *richloc, const char *gmsgid, ...) |
| { |
| gcc_assert (richloc); |
| |
| auto_diagnostic_group d; |
| va_list ap; |
| va_start (ap, gmsgid); |
| diagnostic_impl (richloc, NULL, -1, gmsgid, &ap, DK_ERROR); |
| va_end (ap); |
| } |
| |
| /* "Sorry, not implemented." Use for a language feature which is |
| required by the relevant specification but not implemented by GCC. |
| An object file will not be produced. */ |
| void |
| sorry (const char *gmsgid, ...) |
| { |
| auto_diagnostic_group d; |
| va_list ap; |
| va_start (ap, gmsgid); |
| rich_location richloc (line_table, input_location); |
| diagnostic_impl (&richloc, NULL, -1, gmsgid, &ap, DK_SORRY); |
| va_end (ap); |
| } |
| |
| /* Same as above, but use location LOC instead of input_location. */ |
| void |
| sorry_at (location_t loc, const char *gmsgid, ...) |
| { |
| auto_diagnostic_group d; |
| va_list ap; |
| va_start (ap, gmsgid); |
| rich_location richloc (line_table, loc); |
| diagnostic_impl (&richloc, NULL, -1, gmsgid, &ap, DK_SORRY); |
| va_end (ap); |
| } |
| |
| /* Return true if an error or a "sorry" has been seen. Various |
| processing is disabled after errors. */ |
| bool |
| seen_error (void) |
| { |
| return errorcount || sorrycount; |
| } |
| |
| /* An error which is severe enough that we make no attempt to |
| continue. Do not use this for internal consistency checks; that's |
| internal_error. Use of this function should be rare. */ |
| void |
| fatal_error (location_t loc, const char *gmsgid, ...) |
| { |
| auto_diagnostic_group d; |
| va_list ap; |
| va_start (ap, gmsgid); |
| rich_location richloc (line_table, loc); |
| diagnostic_impl (&richloc, NULL, -1, gmsgid, &ap, DK_FATAL); |
| va_end (ap); |
| |
| gcc_unreachable (); |
| } |
| |
| /* An internal consistency check has failed. We make no attempt to |
| continue. Note that unless there is debugging value to be had from |
| a more specific message, or some other good reason, you should use |
| abort () instead of calling this function directly. */ |
| void |
| internal_error (const char *gmsgid, ...) |
| { |
| auto_diagnostic_group d; |
| va_list ap; |
| va_start (ap, gmsgid); |
| rich_location richloc (line_table, input_location); |
| diagnostic_impl (&richloc, NULL, -1, gmsgid, &ap, DK_ICE); |
| va_end (ap); |
| |
| gcc_unreachable (); |
| } |
| |
| /* Like internal_error, but no backtrace will be printed. Used when |
| the internal error does not happen at the current location, but happened |
| somewhere else. */ |
| void |
| internal_error_no_backtrace (const char *gmsgid, ...) |
| { |
| auto_diagnostic_group d; |
| va_list ap; |
| va_start (ap, gmsgid); |
| rich_location richloc (line_table, input_location); |
| diagnostic_impl (&richloc, NULL, -1, gmsgid, &ap, DK_ICE_NOBT); |
| va_end (ap); |
| |
| gcc_unreachable (); |
| } |
| |
| /* Special case error functions. Most are implemented in terms of the |
| above, or should be. */ |
| |
| /* Print a diagnostic MSGID on FILE. This is just fprintf, except it |
| runs its second argument through gettext. */ |
| void |
| fnotice (FILE *file, const char *cmsgid, ...) |
| { |
| va_list ap; |
| |
| va_start (ap, cmsgid); |
| vfprintf (file, _(cmsgid), ap); |
| va_end (ap); |
| } |
| |
| /* Inform the user that an error occurred while trying to report some |
| other error. This indicates catastrophic internal inconsistencies, |
| so give up now. But do try to flush out the previous error. |
| This mustn't use internal_error, that will cause infinite recursion. */ |
| |
| static void |
| error_recursion (diagnostic_context *context) |
| { |
| if (context->lock < 3) |
| pp_newline_and_flush (context->printer); |
| |
| fnotice (stderr, |
| "Internal compiler error: Error reporting routines re-entered.\n"); |
| |
| /* Call diagnostic_action_after_output to get the "please submit a bug |
| report" message. */ |
| diagnostic_action_after_output (context, DK_ICE); |
| |
| /* Do not use gcc_unreachable here; that goes through internal_error |
| and therefore would cause infinite recursion. */ |
| real_abort (); |
| } |
| |
| /* Report an internal compiler error in a friendly manner. This is |
| the function that gets called upon use of abort() in the source |
| code generally, thanks to a special macro. */ |
| |
| void |
| fancy_abort (const char *file, int line, const char *function) |
| { |
| internal_error ("in %s, at %s:%d", function, trim_filename (file), line); |
| } |
| |
| /* class auto_diagnostic_group. */ |
| |
| /* Constructor: "push" this group into global_dc. */ |
| |
| auto_diagnostic_group::auto_diagnostic_group () |
| { |
| global_dc->diagnostic_group_nesting_depth++; |
| } |
| |
| /* Destructor: "pop" this group from global_dc. */ |
| |
| auto_diagnostic_group::~auto_diagnostic_group () |
| { |
| if (--global_dc->diagnostic_group_nesting_depth == 0) |
| { |
| /* Handle the case where we've popped the final diagnostic group. |
| If any diagnostics were emitted, give the context a chance |
| to do something. */ |
| if (global_dc->diagnostic_group_emission_count > 0) |
| { |
| if (global_dc->end_group_cb) |
| global_dc->end_group_cb (global_dc); |
| } |
| global_dc->diagnostic_group_emission_count = 0; |
| } |
| } |
| |
| /* Implementation of diagnostic_path::num_events vfunc for |
| simple_diagnostic_path: simply get the number of events in the vec. */ |
| |
| unsigned |
| simple_diagnostic_path::num_events () const |
| { |
| return m_events.length (); |
| } |
| |
| /* Implementation of diagnostic_path::get_event vfunc for |
| simple_diagnostic_path: simply return the event in the vec. */ |
| |
| const diagnostic_event & |
| simple_diagnostic_path::get_event (int idx) const |
| { |
| return *m_events[idx]; |
| } |
| |
| /* Add an event to this path at LOC within function FNDECL at |
| stack depth DEPTH. |
| |
| Use m_context's printer to format FMT, as the text of the new |
| event. |
| |
| Return the id of the new event. */ |
| |
| diagnostic_event_id_t |
| simple_diagnostic_path::add_event (location_t loc, tree fndecl, int depth, |
| const char *fmt, ...) |
| { |
| pretty_printer *pp = m_event_pp; |
| pp_clear_output_area (pp); |
| |
| text_info ti; |
| rich_location rich_loc (line_table, UNKNOWN_LOCATION); |
| |
| va_list ap; |
| |
| va_start (ap, fmt); |
| |
| ti.format_spec = _(fmt); |
| ti.args_ptr = ≈ |
| ti.err_no = 0; |
| ti.x_data = NULL; |
| ti.m_richloc = &rich_loc; |
| |
| pp_format (pp, &ti); |
| pp_output_formatted_text (pp); |
| |
| va_end (ap); |
| |
| simple_diagnostic_event *new_event |
| = new simple_diagnostic_event (loc, fndecl, depth, pp_formatted_text (pp)); |
| m_events.safe_push (new_event); |
| |
| pp_clear_output_area (pp); |
| |
| return diagnostic_event_id_t (m_events.length () - 1); |
| } |
| |
| /* struct simple_diagnostic_event. */ |
| |
| /* simple_diagnostic_event's ctor. */ |
| |
| simple_diagnostic_event::simple_diagnostic_event (location_t loc, |
| tree fndecl, |
| int depth, |
| const char *desc) |
| : m_loc (loc), m_fndecl (fndecl), m_depth (depth), m_desc (xstrdup (desc)) |
| { |
| } |
| |
| /* simple_diagnostic_event's dtor. */ |
| |
| simple_diagnostic_event::~simple_diagnostic_event () |
| { |
| free (m_desc); |
| } |
| |
| /* Print PATH by emitting a dummy "note" associated with it. */ |
| |
| DEBUG_FUNCTION |
| void debug (diagnostic_path *path) |
| { |
| rich_location richloc (line_table, UNKNOWN_LOCATION); |
| richloc.set_path (path); |
| inform (&richloc, "debug path"); |
| } |
| |
| /* Really call the system 'abort'. This has to go right at the end of |
| this file, so that there are no functions after it that call abort |
| and get the system abort instead of our macro. */ |
| #undef abort |
| static void |
| real_abort (void) |
| { |
| abort (); |
| } |
| |
| #if CHECKING_P |
| |
| namespace selftest { |
| |
| /* Helper function for test_print_escaped_string. */ |
| |
| static void |
| assert_print_escaped_string (const location &loc, const char *expected_output, |
| const char *input) |
| { |
| pretty_printer pp; |
| print_escaped_string (&pp, input); |
| ASSERT_STREQ_AT (loc, expected_output, pp_formatted_text (&pp)); |
| } |
| |
| #define ASSERT_PRINT_ESCAPED_STRING_STREQ(EXPECTED_OUTPUT, INPUT) \ |
| assert_print_escaped_string (SELFTEST_LOCATION, EXPECTED_OUTPUT, INPUT) |
| |
| /* Tests of print_escaped_string. */ |
| |
| static void |
| test_print_escaped_string () |
| { |
| /* Empty string. */ |
| ASSERT_PRINT_ESCAPED_STRING_STREQ ("\"\"", ""); |
| |
| /* Non-empty string. */ |
| ASSERT_PRINT_ESCAPED_STRING_STREQ ("\"hello world\"", "hello world"); |
| |
| /* Various things that need to be escaped: */ |
| /* Backslash. */ |
| ASSERT_PRINT_ESCAPED_STRING_STREQ ("\"before\\\\after\"", |
| "before\\after"); |
| /* Tab. */ |
| ASSERT_PRINT_ESCAPED_STRING_STREQ ("\"before\\tafter\"", |
| "before\tafter"); |
| /* Newline. */ |
| ASSERT_PRINT_ESCAPED_STRING_STREQ ("\"before\\nafter\"", |
| "before\nafter"); |
| /* Double quote. */ |
| ASSERT_PRINT_ESCAPED_STRING_STREQ ("\"before\\\"after\"", |
| "before\"after"); |
| |
| /* Non-printable characters: BEL: '\a': 0x07 */ |
| ASSERT_PRINT_ESCAPED_STRING_STREQ ("\"before\\007after\"", |
| "before\aafter"); |
| /* Non-printable characters: vertical tab: '\v': 0x0b */ |
| ASSERT_PRINT_ESCAPED_STRING_STREQ ("\"before\\013after\"", |
| "before\vafter"); |
| } |
| |
| /* Tests of print_parseable_fixits. */ |
| |
| /* Verify that print_parseable_fixits emits the empty string if there |
| are no fixits. */ |
| |
| static void |
| test_print_parseable_fixits_none () |
| { |
| pretty_printer pp; |
| rich_location richloc (line_table, UNKNOWN_LOCATION); |
| |
| print_parseable_fixits (&pp, &richloc); |
| ASSERT_STREQ ("", pp_formatted_text (&pp)); |
| } |
| |
| /* Verify that print_parseable_fixits does the right thing if there |
| is an insertion fixit hint. */ |
| |
| static void |
| test_print_parseable_fixits_insert () |
| { |
| pretty_printer pp; |
| rich_location richloc (line_table, UNKNOWN_LOCATION); |
| |
| linemap_add (line_table, LC_ENTER, false, "test.c", 0); |
| linemap_line_start (line_table, 5, 100); |
| linemap_add (line_table, LC_LEAVE, false, NULL, 0); |
| location_t where = linemap_position_for_column (line_table, 10); |
| richloc.add_fixit_insert_before (where, "added content"); |
| |
| print_parseable_fixits (&pp, &richloc); |
| ASSERT_STREQ ("fix-it:\"test.c\":{5:10-5:10}:\"added content\"\n", |
| pp_formatted_text (&pp)); |
| } |
| |
| /* Verify that print_parseable_fixits does the right thing if there |
| is an removal fixit hint. */ |
| |
| static void |
| test_print_parseable_fixits_remove () |
| { |
| pretty_printer pp; |
| rich_location richloc (line_table, UNKNOWN_LOCATION); |
| |
| linemap_add (line_table, LC_ENTER, false, "test.c", 0); |
| linemap_line_start (line_table, 5, 100); |
| linemap_add (line_table, LC_LEAVE, false, NULL, 0); |
| source_range where; |
| where.m_start = linemap_position_for_column (line_table, 10); |
| where.m_finish = linemap_position_for_column (line_table, 20); |
| richloc.add_fixit_remove (where); |
| |
| print_parseable_fixits (&pp, &richloc); |
| ASSERT_STREQ ("fix-it:\"test.c\":{5:10-5:21}:\"\"\n", |
| pp_formatted_text (&pp)); |
| } |
| |
| /* Verify that print_parseable_fixits does the right thing if there |
| is an replacement fixit hint. */ |
| |
| static void |
| test_print_parseable_fixits_replace () |
| { |
| pretty_printer pp; |
| rich_location richloc (line_table, UNKNOWN_LOCATION); |
| |
| linemap_add (line_table, LC_ENTER, false, "test.c", 0); |
| linemap_line_start (line_table, 5, 100); |
| linemap_add (line_table, LC_LEAVE, false, NULL, 0); |
| source_range where; |
| where.m_start = linemap_position_for_column (line_table, 10); |
| where.m_finish = linemap_position_for_column (line_table, 20); |
| richloc.add_fixit_replace (where, "replacement"); |
| |
| print_parseable_fixits (&pp, &richloc); |
| ASSERT_STREQ ("fix-it:\"test.c\":{5:10-5:21}:\"replacement\"\n", |
| pp_formatted_text (&pp)); |
| } |
| |
| /* Verify that |
| diagnostic_get_location_text (..., SHOW_COLUMN) |
| generates EXPECTED_LOC_TEXT, given FILENAME, LINE, COLUMN, with |
| colorization disabled. */ |
| |
| static void |
| assert_location_text (const char *expected_loc_text, |
| const char *filename, int line, int column, |
| bool show_column) |
| { |
| test_diagnostic_context dc; |
| dc.show_column = show_column; |
| |
| expanded_location xloc; |
| xloc.file = filename; |
| xloc.line = line; |
| xloc.column = column; |
| xloc.data = NULL; |
| xloc.sysp = false; |
| |
| char *actual_loc_text = diagnostic_get_location_text (&dc, xloc); |
| ASSERT_STREQ (expected_loc_text, actual_loc_text); |
| free (actual_loc_text); |
| } |
| |
| /* Verify that diagnostic_get_location_text works as expected. */ |
| |
| static void |
| test_diagnostic_get_location_text () |
| { |
| const char *old_progname = progname; |
| progname = "PROGNAME"; |
| assert_location_text ("PROGNAME:", NULL, 0, 0, true); |
| assert_location_text ("<built-in>:", "<built-in>", 42, 10, true); |
| assert_location_text ("foo.c:42:10:", "foo.c", 42, 10, true); |
| assert_location_text ("foo.c:42:", "foo.c", 42, 0, true); |
| assert_location_text ("foo.c:", "foo.c", 0, 10, true); |
| assert_location_text ("foo.c:42:", "foo.c", 42, 10, false); |
| assert_location_text ("foo.c:", "foo.c", 0, 10, false); |
| |
| maybe_line_and_column (INT_MAX, INT_MAX); |
| maybe_line_and_column (INT_MIN, INT_MIN); |
| |
| progname = old_progname; |
| } |
| |
| /* Selftest for num_digits. */ |
| |
| static void |
| test_num_digits () |
| { |
| ASSERT_EQ (1, num_digits (0)); |
| ASSERT_EQ (1, num_digits (9)); |
| ASSERT_EQ (2, num_digits (10)); |
| ASSERT_EQ (2, num_digits (99)); |
| ASSERT_EQ (3, num_digits (100)); |
| ASSERT_EQ (3, num_digits (999)); |
| ASSERT_EQ (4, num_digits (1000)); |
| ASSERT_EQ (4, num_digits (9999)); |
| ASSERT_EQ (5, num_digits (10000)); |
| ASSERT_EQ (5, num_digits (99999)); |
| ASSERT_EQ (6, num_digits (100000)); |
| ASSERT_EQ (6, num_digits (999999)); |
| ASSERT_EQ (7, num_digits (1000000)); |
| ASSERT_EQ (7, num_digits (9999999)); |
| ASSERT_EQ (8, num_digits (10000000)); |
| ASSERT_EQ (8, num_digits (99999999)); |
| } |
| |
| /* Run all of the selftests within this file. */ |
| |
| void |
| diagnostic_c_tests () |
| { |
| test_print_escaped_string (); |
| test_print_parseable_fixits_none (); |
| test_print_parseable_fixits_insert (); |
| test_print_parseable_fixits_remove (); |
| test_print_parseable_fixits_replace (); |
| test_diagnostic_get_location_text (); |
| test_num_digits (); |
| |
| } |
| |
| } // namespace selftest |
| |
| #endif /* #if CHECKING_P */ |
| |
| #if __GNUC__ >= 10 |
| # pragma GCC diagnostic pop |
| #endif |