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[/] [openrisc/] [trunk/] [gnu-dev/] [or1k-gcc/] [libcpp/] [line-map.c] - Rev 751
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/* Map logical line numbers to (source file, line number) pairs. Copyright (C) 2001, 2003, 2004, 2007, 2008, 2009, 2010, 2011 Free Software Foundation, Inc. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; see the file COPYING3. If not see <http://www.gnu.org/licenses/>. In other words, you are welcome to use, share and improve this program. You are forbidden to forbid anyone else to use, share and improve what you give them. Help stamp out software-hoarding! */ #include "config.h" #include "system.h" #include "line-map.h" #include "cpplib.h" #include "internal.h" static void trace_include (const struct line_maps *, const struct line_map *); static const struct line_map * linemap_ordinary_map_lookup (struct line_maps *, source_location); static const struct line_map* linemap_macro_map_lookup (struct line_maps *, source_location); static source_location linemap_macro_map_loc_to_def_point (const struct line_map*, source_location); static source_location linemap_macro_map_loc_unwind_toward_spelling (const struct line_map*, source_location); static source_location linemap_macro_map_loc_to_exp_point (const struct line_map*, source_location); static source_location linemap_macro_loc_to_spelling_point (struct line_maps *, source_location, const struct line_map **); static source_location linemap_macro_loc_to_def_point (struct line_maps *, source_location, const struct line_map **); static source_location linemap_macro_loc_to_exp_point (struct line_maps *, source_location, const struct line_map **); /* Counters defined in macro.c. */ extern unsigned num_expanded_macros_counter; extern unsigned num_macro_tokens_counter; /* Initialize a line map set. */ void linemap_init (struct line_maps *set) { memset (set, 0, sizeof (struct line_maps)); set->highest_location = RESERVED_LOCATION_COUNT - 1; set->highest_line = RESERVED_LOCATION_COUNT - 1; } /* Check for and warn about line_maps entered but not exited. */ void linemap_check_files_exited (struct line_maps *set) { struct line_map *map; /* Depending upon whether we are handling preprocessed input or not, this can be a user error or an ICE. */ for (map = LINEMAPS_LAST_ORDINARY_MAP (set); ! MAIN_FILE_P (map); map = INCLUDED_FROM (set, map)) fprintf (stderr, "line-map.c: file \"%s\" entered but not left\n", ORDINARY_MAP_FILE_NAME (map)); } /* Create a new line map in the line map set SET, and return it. REASON is the reason of creating the map. It determines the type of map created (ordinary or macro map). Note that ordinary maps and macro maps are allocated in different memory location. */ static struct line_map * new_linemap (struct line_maps *set, enum lc_reason reason) { /* Depending on this variable, a macro map would be allocated in a different memory location than an ordinary map. */ bool macro_map_p = (reason == LC_ENTER_MACRO); struct line_map *result; if (LINEMAPS_USED (set, macro_map_p) == LINEMAPS_ALLOCATED (set, macro_map_p)) { /* We ran out of allocated line maps. Let's allocate more. */ unsigned alloc_size; line_map_realloc reallocator = set->reallocator ? set->reallocator : xrealloc; line_map_round_alloc_size_func round_alloc_size = set->round_alloc_size; /* We are going to execute some dance to try to reduce the overhead of the memory allocator, in case we are using the ggc-page.c one. The actual size of memory we are going to get back from the allocator is the smallest power of 2 that is greater than the size we requested. So let's consider that size then. */ alloc_size = (2 * LINEMAPS_ALLOCATED (set, macro_map_p) + 256) * sizeof (struct line_map); /* Get the actual size of memory that is going to be allocated by the allocator. */ alloc_size = round_alloc_size (alloc_size); /* Now alloc_size contains the exact memory size we would get if we have asked for the initial alloc_size amount of memory. Let's get back to the number of macro map that amounts to. */ LINEMAPS_ALLOCATED (set, macro_map_p) = alloc_size / (sizeof (struct line_map)); /* And now let's really do the re-allocation. */ LINEMAPS_MAPS (set, macro_map_p) = (struct line_map *) (*reallocator) (LINEMAPS_MAPS (set, macro_map_p), (LINEMAPS_ALLOCATED (set, macro_map_p) * sizeof (struct line_map))); result = &LINEMAPS_MAPS (set, macro_map_p)[LINEMAPS_USED (set, macro_map_p)]; memset (result, 0, ((LINEMAPS_ALLOCATED (set, macro_map_p) - LINEMAPS_USED (set, macro_map_p)) * sizeof (struct line_map))); } else result = &LINEMAPS_MAPS (set, macro_map_p)[LINEMAPS_USED (set, macro_map_p)]; LINEMAPS_USED (set, macro_map_p)++; result->reason = reason; return result; } /* Add a mapping of logical source line to physical source file and line number. The text pointed to by TO_FILE must have a lifetime at least as long as the final call to lookup_line (). An empty TO_FILE means standard input. If reason is LC_LEAVE, and TO_FILE is NULL, then TO_FILE, TO_LINE and SYSP are given their natural values considering the file we are returning to. FROM_LINE should be monotonic increasing across calls to this function. A call to this function can relocate the previous set of maps, so any stored line_map pointers should not be used. */ const struct line_map * linemap_add (struct line_maps *set, enum lc_reason reason, unsigned int sysp, const char *to_file, linenum_type to_line) { struct line_map *map; source_location start_location = set->highest_location + 1; linemap_assert (!(LINEMAPS_ORDINARY_USED (set) && (start_location < MAP_START_LOCATION (LINEMAPS_LAST_ORDINARY_MAP (set))))); /* When we enter the file for the first time reason cannot be LC_RENAME. */ linemap_assert (!(set->depth == 0 && reason == LC_RENAME)); /* If we are leaving the main file, return a NULL map. */ if (reason == LC_LEAVE && MAIN_FILE_P (LINEMAPS_LAST_ORDINARY_MAP (set)) && to_file == NULL) { set->depth--; return NULL; } map = new_linemap (set, reason); if (to_file && *to_file == '\0' && reason != LC_RENAME_VERBATIM) to_file = "<stdin>"; if (reason == LC_RENAME_VERBATIM) reason = LC_RENAME; if (reason == LC_LEAVE) { /* When we are just leaving an "included" file, and jump to the next location inside the "includer" right after the #include "included", this variable points the map in use right before the #include "included", inside the same "includer" file. */ struct line_map *from; bool error; if (MAIN_FILE_P (map - 1)) { /* So this _should_ means we are leaving the main file -- effectively ending the compilation unit. But to_file not being NULL means the caller thinks we are leaving to another file. This is an erroneous behaviour but we'll try to recover from it. Let's pretend we are not leaving the main file. */ error = true; reason = LC_RENAME; from = map - 1; } else { /* (MAP - 1) points to the map we are leaving. The map from which (MAP - 1) got included should be the map that comes right before MAP in the same file. */ from = INCLUDED_FROM (set, map - 1); error = to_file && filename_cmp (ORDINARY_MAP_FILE_NAME (from), to_file); } /* Depending upon whether we are handling preprocessed input or not, this can be a user error or an ICE. */ if (error) fprintf (stderr, "line-map.c: file \"%s\" left but not entered\n", to_file); /* A TO_FILE of NULL is special - we use the natural values. */ if (error || to_file == NULL) { to_file = ORDINARY_MAP_FILE_NAME (from); to_line = SOURCE_LINE (from, from[1].start_location); sysp = ORDINARY_MAP_IN_SYSTEM_HEADER_P (from); } } linemap_assert (reason != LC_ENTER_MACRO); ORDINARY_MAP_IN_SYSTEM_HEADER_P (map) = sysp; MAP_START_LOCATION (map) = start_location; ORDINARY_MAP_FILE_NAME (map) = to_file; ORDINARY_MAP_STARTING_LINE_NUMBER (map) = to_line; LINEMAPS_ORDINARY_CACHE (set) = LINEMAPS_ORDINARY_USED (set) - 1; ORDINARY_MAP_NUMBER_OF_COLUMN_BITS (map) = 0; set->highest_location = start_location; set->highest_line = start_location; set->max_column_hint = 0; if (reason == LC_ENTER) { ORDINARY_MAP_INCLUDER_FILE_INDEX (map) = set->depth == 0 ? -1 : (int) (LINEMAPS_ORDINARY_USED (set) - 2); set->depth++; if (set->trace_includes) trace_include (set, map); } else if (reason == LC_RENAME) ORDINARY_MAP_INCLUDER_FILE_INDEX (map) = ORDINARY_MAP_INCLUDER_FILE_INDEX (&map[-1]); else if (reason == LC_LEAVE) { set->depth--; ORDINARY_MAP_INCLUDER_FILE_INDEX (map) = ORDINARY_MAP_INCLUDER_FILE_INDEX (INCLUDED_FROM (set, map - 1)); } return map; } /* Returns TRUE if the line table set tracks token locations accross macro expansion, FALSE otherwise. */ bool linemap_tracks_macro_expansion_locs_p (struct line_maps *set) { return LINEMAPS_MACRO_MAPS (set) != NULL; } /* Create a macro map. A macro map encodes source locations of tokens that are part of a macro replacement-list, at a macro expansion point. See the extensive comments of struct line_map and struct line_map_macro, in line-map.h. This map shall be created when the macro is expanded. The map encodes the source location of the expansion point of the macro as well as the "original" source location of each token that is part of the macro replacement-list. If a macro is defined but never expanded, it has no macro map. SET is the set of maps the macro map should be part of. MACRO_NODE is the macro which the new macro map should encode source locations for. EXPANSION is the location of the expansion point of MACRO. For function-like macros invocations, it's best to make it point to the closing parenthesis of the macro, rather than the the location of the first character of the macro. NUM_TOKENS is the number of tokens that are part of the replacement-list of MACRO. Note that when we run out of the integer space available for source locations, this function returns NULL. In that case, callers of this function cannot encode {line,column} pairs into locations of macro tokens anymore. */ const struct line_map * linemap_enter_macro (struct line_maps *set, struct cpp_hashnode *macro_node, source_location expansion, unsigned int num_tokens) { struct line_map *map; source_location start_location; line_map_realloc reallocator = set->reallocator ? set->reallocator : xrealloc; start_location = LINEMAPS_MACRO_LOWEST_LOCATION (set) - num_tokens; if (start_location <= set->highest_line || start_location > LINEMAPS_MACRO_LOWEST_LOCATION (set)) /* We ran out of macro map space. */ return NULL; map = new_linemap (set, LC_ENTER_MACRO); MAP_START_LOCATION (map) = start_location; MACRO_MAP_MACRO (map) = macro_node; MACRO_MAP_NUM_MACRO_TOKENS (map) = num_tokens; MACRO_MAP_LOCATIONS (map) = (source_location*) reallocator (NULL, 2 * num_tokens * sizeof (source_location)); MACRO_MAP_EXPANSION_POINT_LOCATION (map) = expansion; memset (MACRO_MAP_LOCATIONS (map), 0, num_tokens * sizeof (source_location)); LINEMAPS_MACRO_CACHE (set) = LINEMAPS_MACRO_USED (set) - 1; set->max_column_hint = 0; return map; } /* Create and return a virtual location for a token that is part of a macro expansion-list at a macro expansion point. See the comment inside struct line_map_macro to see what an expansion-list exactly is. A call to this function must come after a call to linemap_enter_macro. MAP is the map into which the source location is created. TOKEN_NO is the index of the token in the macro replacement-list, starting at number 0. ORIG_LOC is the location of the token outside of this macro expansion. If the token comes originally from the macro definition, it is the locus in the macro definition; otherwise it is a location in the context of the caller of this macro expansion (which is a virtual location or a source location if the caller is itself a macro expansion or not). MACRO_DEFINITION_LOC is the location in the macro definition, either of the token itself or of a macro parameter that it replaces. */ source_location linemap_add_macro_token (const struct line_map *map, unsigned int token_no, source_location orig_loc, source_location orig_parm_replacement_loc) { source_location result; linemap_assert (linemap_macro_expansion_map_p (map)); linemap_assert (token_no < MACRO_MAP_NUM_MACRO_TOKENS (map)); MACRO_MAP_LOCATIONS (map)[2 * token_no] = orig_loc; MACRO_MAP_LOCATIONS (map)[2 * token_no + 1] = orig_parm_replacement_loc; result = MAP_START_LOCATION (map) + token_no; return result; } /* Return a source_location for the start (i.e. column==0) of (physical) line TO_LINE in the current source file (as in the most recent linemap_add). MAX_COLUMN_HINT is the highest column number we expect to use in this line (but it does not change the highest_location). */ source_location linemap_line_start (struct line_maps *set, linenum_type to_line, unsigned int max_column_hint) { struct line_map *map = LINEMAPS_LAST_ORDINARY_MAP (set); source_location highest = set->highest_location; source_location r; linenum_type last_line = SOURCE_LINE (map, set->highest_line); int line_delta = to_line - last_line; bool add_map = false; if (line_delta < 0 || (line_delta > 10 && line_delta * ORDINARY_MAP_NUMBER_OF_COLUMN_BITS (map) > 1000) || (max_column_hint >= (1U << ORDINARY_MAP_NUMBER_OF_COLUMN_BITS (map))) || (max_column_hint <= 80 && ORDINARY_MAP_NUMBER_OF_COLUMN_BITS (map) >= 10)) { add_map = true; } else max_column_hint = set->max_column_hint; if (add_map) { int column_bits; if (max_column_hint > 100000 || highest > 0xC0000000) { /* If the column number is ridiculous or we've allocated a huge number of source_locations, give up on column numbers. */ max_column_hint = 0; if (highest >0xF0000000) return 0; column_bits = 0; } else { column_bits = 7; while (max_column_hint >= (1U << column_bits)) column_bits++; max_column_hint = 1U << column_bits; } /* Allocate the new line_map. However, if the current map only has a single line we can sometimes just increase its column_bits instead. */ if (line_delta < 0 || last_line != ORDINARY_MAP_STARTING_LINE_NUMBER (map) || SOURCE_COLUMN (map, highest) >= (1U << column_bits)) map = (struct line_map *) linemap_add (set, LC_RENAME, ORDINARY_MAP_IN_SYSTEM_HEADER_P (map), ORDINARY_MAP_FILE_NAME (map), to_line); ORDINARY_MAP_NUMBER_OF_COLUMN_BITS (map) = column_bits; r = (MAP_START_LOCATION (map) + ((to_line - ORDINARY_MAP_STARTING_LINE_NUMBER (map)) << column_bits)); } else r = highest - SOURCE_COLUMN (map, highest) + (line_delta << ORDINARY_MAP_NUMBER_OF_COLUMN_BITS (map)); /* Locations of ordinary tokens are always lower than locations of macro tokens. */ if (r >= LINEMAPS_MACRO_LOWEST_LOCATION (set)) return 0; set->highest_line = r; if (r > set->highest_location) set->highest_location = r; set->max_column_hint = max_column_hint; return r; } /* Encode and return a source_location from a column number. The source line considered is the last source line used to call linemap_line_start, i.e, the last source line which a location was encoded from. */ source_location linemap_position_for_column (struct line_maps *set, unsigned int to_column) { source_location r = set->highest_line; linemap_assert (!linemap_macro_expansion_map_p (LINEMAPS_LAST_ORDINARY_MAP (set))); if (to_column >= set->max_column_hint) { if (r >= 0xC000000 || to_column > 100000) { /* Running low on source_locations - disable column numbers. */ return r; } else { struct line_map *map = LINEMAPS_LAST_ORDINARY_MAP (set); r = linemap_line_start (set, SOURCE_LINE (map, r), to_column + 50); } } r = r + to_column; if (r >= set->highest_location) set->highest_location = r; return r; } /* Encode and return a source location from a given line and column. */ source_location linemap_position_for_line_and_column (struct line_map *map, linenum_type line, unsigned column) { linemap_assert (ORDINARY_MAP_STARTING_LINE_NUMBER (map) <= line); return (MAP_START_LOCATION (map) + ((line - ORDINARY_MAP_STARTING_LINE_NUMBER (map)) << ORDINARY_MAP_NUMBER_OF_COLUMN_BITS (map)) + (column & ((1 << ORDINARY_MAP_NUMBER_OF_COLUMN_BITS (map)) - 1))); } /* Given a virtual source location yielded by a map (either an ordinary or a macro map), returns that map. */ const struct line_map* linemap_lookup (struct line_maps *set, source_location line) { if (linemap_location_from_macro_expansion_p (set, line)) return linemap_macro_map_lookup (set, line); return linemap_ordinary_map_lookup (set, line); } /* Given a source location yielded by an ordinary map, returns that map. Since the set is built chronologically, the logical lines are monotonic increasing, and so the list is sorted and we can use a binary search. */ static const struct line_map * linemap_ordinary_map_lookup (struct line_maps *set, source_location line) { unsigned int md, mn, mx; const struct line_map *cached, *result; if (set == NULL || line < RESERVED_LOCATION_COUNT) return NULL; mn = LINEMAPS_ORDINARY_CACHE (set); mx = LINEMAPS_ORDINARY_USED (set); cached = LINEMAPS_ORDINARY_MAP_AT (set, mn); /* We should get a segfault if no line_maps have been added yet. */ if (line >= MAP_START_LOCATION (cached)) { if (mn + 1 == mx || line < MAP_START_LOCATION (&cached[1])) return cached; } else { mx = mn; mn = 0; } while (mx - mn > 1) { md = (mn + mx) / 2; if (MAP_START_LOCATION (LINEMAPS_ORDINARY_MAP_AT (set, md)) > line) mx = md; else mn = md; } LINEMAPS_ORDINARY_CACHE (set) = mn; result = LINEMAPS_ORDINARY_MAP_AT (set, mn); linemap_assert (line >= MAP_START_LOCATION (result)); return result; } /* Given a source location yielded by a macro map, returns that map. Since the set is built chronologically, the logical lines are monotonic decreasing, and so the list is sorted and we can use a binary search. */ static const struct line_map* linemap_macro_map_lookup (struct line_maps *set, source_location line) { unsigned int md, mn, mx; const struct line_map *cached, *result; linemap_assert (line >= LINEMAPS_MACRO_LOWEST_LOCATION (set)); if (set == NULL) return NULL; mn = LINEMAPS_MACRO_CACHE (set); mx = LINEMAPS_MACRO_USED (set); cached = LINEMAPS_MACRO_MAP_AT (set, mn); if (line >= MAP_START_LOCATION (cached)) { if (mn == 0 || line < MAP_START_LOCATION (&cached[-1])) return cached; mx = mn - 1; mn = 0; } while (mn < mx) { md = (mx + mn) / 2; if (MAP_START_LOCATION (LINEMAPS_MACRO_MAP_AT (set, md)) > line) mn = md + 1; else mx = md; } LINEMAPS_MACRO_CACHE (set) = mx; result = LINEMAPS_MACRO_MAP_AT (set, LINEMAPS_MACRO_CACHE (set)); linemap_assert (MAP_START_LOCATION (result) <= line); return result; } /* Return TRUE if MAP encodes locations coming from a macro replacement-list at macro expansion point. */ bool linemap_macro_expansion_map_p (const struct line_map *map) { if (!map) return false; return (map->reason == LC_ENTER_MACRO); } /* If LOCATION is the locus of a token in a replacement-list of a macro expansion return the location of the macro expansion point. Read the comments of struct line_map and struct line_map_macro in line-map.h to understand what a macro expansion point is. */ static source_location linemap_macro_map_loc_to_exp_point (const struct line_map *map, source_location location ATTRIBUTE_UNUSED) { linemap_assert (linemap_macro_expansion_map_p (map) && location >= MAP_START_LOCATION (map)); /* Make sure LOCATION is correct. */ linemap_assert ((location - MAP_START_LOCATION (map)) < MACRO_MAP_NUM_MACRO_TOKENS (map)); return MACRO_MAP_EXPANSION_POINT_LOCATION (map); } /* If LOCATION is the source location of a token that belongs to a macro replacement-list -- as part of a macro expansion -- then return the location of the token at the definition point of the macro. Otherwise, return LOCATION. SET is the set of maps location come from. ORIGINAL_MAP is an output parm. If non NULL, the function sets *ORIGINAL_MAP to the ordinary (non-macro) map the returned location comes from. */ source_location linemap_macro_map_loc_to_def_point (const struct line_map *map, source_location location) { unsigned token_no; linemap_assert (linemap_macro_expansion_map_p (map) && location >= MAP_START_LOCATION (map)); linemap_assert (location >= RESERVED_LOCATION_COUNT); token_no = location - MAP_START_LOCATION (map); linemap_assert (token_no < MACRO_MAP_NUM_MACRO_TOKENS (map)); location = MACRO_MAP_LOCATIONS (map)[2 * token_no + 1]; return location; } /* If LOCATION is the locus of a token that is an argument of a function-like macro M and appears in the expansion of M, return the locus of that argument in the context of the caller of M. In other words, this returns the xI location presented in the comments of line_map_macro above. */ source_location linemap_macro_map_loc_unwind_toward_spelling (const struct line_map* map, source_location location) { unsigned token_no; linemap_assert (linemap_macro_expansion_map_p (map) && location >= MAP_START_LOCATION (map)); linemap_assert (location >= RESERVED_LOCATION_COUNT); token_no = location - MAP_START_LOCATION (map); linemap_assert (token_no < MACRO_MAP_NUM_MACRO_TOKENS (map)); location = MACRO_MAP_LOCATIONS (map)[2 * token_no]; return location; } /* Return the source line number corresponding to source location LOCATION. SET is the line map set LOCATION comes from. If LOCATION is the source location of token that is part of the replacement-list of a macro expansion return the line number of the macro expansion point. */ int linemap_get_expansion_line (struct line_maps *set, source_location location) { const struct line_map *map = NULL; if (location < RESERVED_LOCATION_COUNT) return 0; location = linemap_macro_loc_to_exp_point (set, location, &map); return SOURCE_LINE (map, location); } /* Return the path of the file corresponding to source code location LOCATION. If LOCATION is the source location of token that is part of the replacement-list of a macro expansion return the file path of the macro expansion point. SET is the line map set LOCATION comes from. */ const char* linemap_get_expansion_filename (struct line_maps *set, source_location location) { const struct line_map *map = NULL; if (location < RESERVED_LOCATION_COUNT) return NULL; location = linemap_macro_loc_to_exp_point (set, location, &map); return LINEMAP_FILE (map); } /* Return the name of the macro associated to MACRO_MAP. */ const char* linemap_map_get_macro_name (const struct line_map* macro_map) { linemap_assert (macro_map && linemap_macro_expansion_map_p (macro_map)); return (const char*) NODE_NAME (MACRO_MAP_MACRO (macro_map)); } /* Return a positive value if LOCATION is the locus of a token that is located in a system header, O otherwise. It returns 1 if LOCATION is the locus of a token that is located in a system header, and 2 if LOCATION is the locus of a token located in a C system header that therefore needs to be extern "C" protected in C++. Note that this function returns 1 if LOCATION belongs to a token that is part of a macro replacement-list defined in a system header, but expanded in a non-system file. */ int linemap_location_in_system_header_p (struct line_maps *set, source_location location) { const struct line_map *map = NULL; location = linemap_resolve_location (set, location, LRK_SPELLING_LOCATION, &map); if (location < RESERVED_LOCATION_COUNT) return false; return LINEMAP_SYSP (map); } /* Return TRUE if LOCATION is a source code location of a token coming from a macro replacement-list at a macro expansion point, FALSE otherwise. */ bool linemap_location_from_macro_expansion_p (struct line_maps *set, source_location location) { linemap_assert (location <= MAX_SOURCE_LOCATION && (set->highest_location < LINEMAPS_MACRO_LOWEST_LOCATION (set))); if (set == NULL) return false; return (location > set->highest_location); } /* Given two virtual locations *LOC0 and *LOC1, return the first common macro map in their macro expansion histories. Return NULL if no common macro was found. *LOC0 (resp. *LOC1) is set to the virtual location of the token inside the resulting macro. */ static const struct line_map* first_map_in_common_1 (struct line_maps *set, source_location *loc0, source_location *loc1) { source_location l0 = *loc0, l1 = *loc1; const struct line_map *map0 = linemap_lookup (set, l0), *map1 = linemap_lookup (set, l1); while (linemap_macro_expansion_map_p (map0) && linemap_macro_expansion_map_p (map1) && (map0 != map1)) { if (MAP_START_LOCATION (map0) < MAP_START_LOCATION (map1)) { l0 = linemap_macro_map_loc_to_exp_point (map0, l0); map0 = linemap_lookup (set, l0); } else { l1 = linemap_macro_map_loc_to_exp_point (map1, l1); map1 = linemap_lookup (set, l1); } } if (map0 == map1) { *loc0 = l0; *loc1 = l1; return map0; } return NULL; } /* Given two virtual locations LOC0 and LOC1, return the first common macro map in their macro expansion histories. Return NULL if no common macro was found. *RES_LOC0 (resp. *RES_LOC1) is set to the virtual location of the token inside the resulting macro, upon return of a non-NULL result. */ static const struct line_map* first_map_in_common (struct line_maps *set, source_location loc0, source_location loc1, source_location *res_loc0, source_location *res_loc1) { *res_loc0 = loc0; *res_loc1 = loc1; return first_map_in_common_1 (set, res_loc0, res_loc1); } /* Return a positive value if PRE denotes the location of a token that comes before the token of POST, 0 if PRE denotes the location of the same token as the token for POST, and a negative value otherwise. */ int linemap_compare_locations (struct line_maps *set, source_location pre, source_location post) { bool pre_virtual_p, post_virtual_p; source_location l0 = pre, l1 = post; if (l0 == l1) return 0; if ((pre_virtual_p = linemap_location_from_macro_expansion_p (set, l0))) l0 = linemap_resolve_location (set, l0, LRK_MACRO_EXPANSION_POINT, NULL); if ((post_virtual_p = linemap_location_from_macro_expansion_p (set, l1))) l1 = linemap_resolve_location (set, l1, LRK_MACRO_EXPANSION_POINT, NULL); if (l0 == l1 && pre_virtual_p && post_virtual_p) { /* So pre and post represent two tokens that are present in a same macro expansion. Let's see if the token for pre was before the token for post in that expansion. */ unsigned i0, i1; const struct line_map *map = first_map_in_common (set, pre, post, &l0, &l1); if (map == NULL) /* This should not be possible. */ abort (); i0 = l0 - MAP_START_LOCATION (map); i1 = l1 - MAP_START_LOCATION (map); return i1 - i0; } return l1 - l0; } /* Print an include trace, for e.g. the -H option of the preprocessor. */ static void trace_include (const struct line_maps *set, const struct line_map *map) { unsigned int i = set->depth; while (--i) putc ('.', stderr); fprintf (stderr, " %s\n", ORDINARY_MAP_FILE_NAME (map)); } /* Return the spelling location of the token wherever it comes from, whether part of a macro definition or not. This is a subroutine for linemap_resolve_location. */ static source_location linemap_macro_loc_to_spelling_point (struct line_maps *set, source_location location, const struct line_map **original_map) { struct line_map *map; linemap_assert (set && location >= RESERVED_LOCATION_COUNT); while (true) { map = (struct line_map*) linemap_lookup (set, location); if (!linemap_macro_expansion_map_p (map)) break; location = linemap_macro_map_loc_unwind_toward_spelling (map, location); } if (original_map) *original_map = map; return location; } /* If LOCATION is the source location of a token that belongs to a macro replacement-list -- as part of a macro expansion -- then return the location of the token at the definition point of the macro. Otherwise, return LOCATION. SET is the set of maps location come from. ORIGINAL_MAP is an output parm. If non NULL, the function sets *ORIGINAL_MAP to the ordinary (non-macro) map the returned location comes from. This is a subroutine of linemap_resolve_location. */ static source_location linemap_macro_loc_to_def_point (struct line_maps *set, source_location location, const struct line_map **original_map) { struct line_map *map; linemap_assert (set && location >= RESERVED_LOCATION_COUNT); while (true) { map = (struct line_map*) linemap_lookup (set, location); if (!linemap_macro_expansion_map_p (map)) break; location = linemap_macro_map_loc_to_def_point (map, location); } if (original_map) *original_map = map; return location; } /* If LOCATION is the source location of a token that belongs to a macro replacement-list -- at a macro expansion point -- then return the location of the topmost expansion point of the macro. We say topmost because if we are in the context of a nested macro expansion, the function returns the source location of the first macro expansion that triggered the nested expansions. Otherwise, return LOCATION. SET is the set of maps location come from. ORIGINAL_MAP is an output parm. If non NULL, the function sets *ORIGINAL_MAP to the ordinary (non-macro) map the returned location comes from. This is a subroutine of linemap_resolve_location. */ static source_location linemap_macro_loc_to_exp_point (struct line_maps *set, source_location location, const struct line_map **original_map) { struct line_map *map; linemap_assert (set && location >= RESERVED_LOCATION_COUNT); while (true) { map = (struct line_map*) linemap_lookup (set, location); if (!linemap_macro_expansion_map_p (map)) break; location = linemap_macro_map_loc_to_exp_point (map, location); } if (original_map) *original_map = map; return location; } /* Resolve a virtual location into either a spelling location, an expansion point location or a token argument replacement point location. Return the map that encodes the virtual location as well as the resolved location. If LOC is *NOT* the location of a token resulting from the expansion of a macro, then the parameter LRK (which stands for Location Resolution Kind) is ignored and the resulting location just equals the one given in argument. Now if LOC *IS* the location of a token resulting from the expansion of a macro, this is what happens. * If LRK is set to LRK_MACRO_EXPANSION_POINT ------------------------------- The virtual location is resolved to the location to the locus of the expansion point of the macro. * If LRK is set to LRK_SPELLING_LOCATION ------------------------------------- The virtual location is resolved to the location to the locus where the token has been spelled in the source. This can follow through all the macro expansions that led to the token. * If LRK is set to LRK_MACRO_PARM_REPLACEMENT_POINT -------------------------------------- If LOC is the locus of a token that is an argument of a function-like macro [replacing a parameter in the replacement list of the macro] the virtual location is resolved to the locus of the parameter that is replaced, in the context of the definition of the macro. If LOC is the locus of a token that is not an argument of a function-like macro, then the function behaves as if LRK was set to LRK_SPELLING_LOCATION. If MAP is non-NULL, *MAP is set to the map of the resolved location. Note that if the resturned location wasn't originally encoded by a map, the *MAP is set to NULL. This can happen if LOC resolves to a location reserved for the client code, like UNKNOWN_LOCATION or BUILTINS_LOCATION in GCC. */ source_location linemap_resolve_location (struct line_maps *set, source_location loc, enum location_resolution_kind lrk, const struct line_map **map) { if (loc < RESERVED_LOCATION_COUNT) { /* A reserved location wasn't encoded in a map. Let's return a NULL map here, just like what linemap_ordinary_map_lookup does. */ if (map) *map = NULL; return loc; } switch (lrk) { case LRK_MACRO_EXPANSION_POINT: loc = linemap_macro_loc_to_exp_point (set, loc, map); break; case LRK_SPELLING_LOCATION: loc = linemap_macro_loc_to_spelling_point (set, loc, map); break; case LRK_MACRO_DEFINITION_LOCATION: loc = linemap_macro_loc_to_def_point (set, loc, map); break; default: abort (); } return loc; } /* Suppose that LOC is the virtual location of a token T coming from the expansion of a macro M. This function then steps up to get the location L of the point where M got expanded. If L is a spelling location inside a macro expansion M', then this function returns the locus of the point where M' was expanded. Said otherwise, this function returns the location of T in the context that triggered the expansion of M. *LOC_MAP must be set to the map of LOC. This function then sets it to the map of the returned location. */ source_location linemap_unwind_toward_expansion (struct line_maps *set, source_location loc, const struct line_map **map) { source_location resolved_location; const struct line_map *resolved_map; resolved_location = linemap_macro_map_loc_unwind_toward_spelling (*map, loc); resolved_map = linemap_lookup (set, resolved_location); if (!linemap_macro_expansion_map_p (resolved_map)) { resolved_location = linemap_macro_map_loc_to_exp_point (*map, loc); resolved_map = linemap_lookup (set, resolved_location); } *map = resolved_map; return resolved_location; } /* Expand source code location LOC and return a user readable source code location. LOC must be a spelling (non-virtual) location. If it's a location < RESERVED_LOCATION_COUNT a zeroed expanded source location is returned. */ expanded_location linemap_expand_location (struct line_maps *set, const struct line_map *map, source_location loc) { expanded_location xloc; memset (&xloc, 0, sizeof (xloc)); if (loc < RESERVED_LOCATION_COUNT) /* The location for this token wasn't generated from a line map. It was probably a location for a builtin token, chosen by some client code. Let's not try to expand the location in that case. */; else if (map == NULL) /* We shouldn't be getting a NULL map with a location that is not reserved by the client code. */ abort (); else { /* MAP must be an ordinary map and LOC must be non-virtual, encoded into this map, obviously; the accessors used on MAP below ensure it is ordinary. Let's just assert the non-virtualness of LOC here. */ if (linemap_location_from_macro_expansion_p (set, loc)) abort (); xloc.file = LINEMAP_FILE (map); xloc.line = SOURCE_LINE (map, loc); xloc.column = SOURCE_COLUMN (map, loc); xloc.sysp = LINEMAP_SYSP (map) != 0; } return xloc; } /* Dump line map at index IX in line table SET to STREAM. If STREAM is NULL, use stderr. IS_MACRO is true if the caller wants to dump a macro map, false otherwise. */ void linemap_dump (FILE *stream, struct line_maps *set, unsigned ix, bool is_macro) { const char *lc_reasons_v[LC_ENTER_MACRO + 1] = { "LC_ENTER", "LC_LEAVE", "LC_RENAME", "LC_RENAME_VERBATIM", "LC_ENTER_MACRO" }; const char *reason; struct line_map *map; if (stream == NULL) stream = stderr; if (!is_macro) map = LINEMAPS_ORDINARY_MAP_AT (set, ix); else map = LINEMAPS_MACRO_MAP_AT (set, ix); reason = (map->reason <= LC_ENTER_MACRO) ? lc_reasons_v[map->reason] : "???"; fprintf (stream, "Map #%u [%p] - LOC: %u - REASON: %s - SYSP: %s\n", ix, (void *) map, map->start_location, reason, (!is_macro && ORDINARY_MAP_IN_SYSTEM_HEADER_P (map)) ? "yes" : "no"); if (!is_macro) { unsigned includer_ix; struct line_map *includer_map; includer_ix = ORDINARY_MAP_INCLUDER_FILE_INDEX (map); includer_map = includer_ix < LINEMAPS_ORDINARY_USED (set) ? LINEMAPS_ORDINARY_MAP_AT (set, includer_ix) : NULL; fprintf (stream, "File: %s:%d\n", ORDINARY_MAP_FILE_NAME (map), ORDINARY_MAP_STARTING_LINE_NUMBER (map)); fprintf (stream, "Included from: [%d] %s\n", includer_ix, includer_map ? ORDINARY_MAP_FILE_NAME (includer_map) : "None"); } else fprintf (stream, "Macro: %s (%u tokens)\n", linemap_map_get_macro_name (map), MACRO_MAP_NUM_MACRO_TOKENS (map)); fprintf (stream, "\n"); } /* Dump debugging information about source location LOC into the file stream STREAM. SET is the line map set LOC comes from. */ void linemap_dump_location (struct line_maps *set, source_location loc, FILE *stream) { const struct line_map *map; source_location location; const char *path = "", *from = ""; int l = -1, c = -1, s = -1, e = -1; if (loc == 0) return; location = linemap_resolve_location (set, loc, LRK_MACRO_DEFINITION_LOCATION, &map); if (map == NULL) /* Only reserved locations can be tolerated in this case. */ linemap_assert (location < RESERVED_LOCATION_COUNT); else { path = LINEMAP_FILE (map); l = SOURCE_LINE (map, location); c = SOURCE_COLUMN (map, location); s = LINEMAP_SYSP (map) != 0; e = location != loc; if (e) from = "N/A"; else from = (INCLUDED_FROM (set, map)) ? LINEMAP_FILE (INCLUDED_FROM (set, map)) : "<NULL>"; } /* P: path, L: line, C: column, S: in-system-header, M: map address, E: macro expansion?, LOC: original location, R: resolved location */ fprintf (stream, "{P:%s;F:%s;L:%d;C:%d;S:%d;M:%p;E:%d,LOC:%d,R:%d}", path, from, l, c, s, (void*)map, e, loc, location); } /* Compute and return statistics about the memory consumption of some parts of the line table SET. */ void linemap_get_statistics (struct line_maps *set, struct linemap_stats *s) { long ordinary_maps_allocated_size, ordinary_maps_used_size, macro_maps_allocated_size, macro_maps_used_size, macro_maps_locations_size = 0, duplicated_macro_maps_locations_size = 0; struct line_map *cur_map; ordinary_maps_allocated_size = LINEMAPS_ORDINARY_ALLOCATED (set) * sizeof (struct line_map); ordinary_maps_used_size = LINEMAPS_ORDINARY_USED (set) * sizeof (struct line_map); macro_maps_allocated_size = LINEMAPS_MACRO_ALLOCATED (set) * sizeof (struct line_map); for (cur_map = LINEMAPS_MACRO_MAPS (set); cur_map && cur_map <= LINEMAPS_LAST_MACRO_MAP (set); ++cur_map) { unsigned i; linemap_assert (linemap_macro_expansion_map_p (cur_map)); macro_maps_locations_size += 2 * MACRO_MAP_NUM_MACRO_TOKENS (cur_map) * sizeof (source_location); for (i = 0; i < 2 * MACRO_MAP_NUM_MACRO_TOKENS (cur_map); i += 2) { if (MACRO_MAP_LOCATIONS (cur_map)[i] == MACRO_MAP_LOCATIONS (cur_map)[i + 1]) duplicated_macro_maps_locations_size += sizeof (source_location); } } macro_maps_used_size = LINEMAPS_MACRO_USED (set) * sizeof (struct line_map); s->num_ordinary_maps_allocated = LINEMAPS_ORDINARY_ALLOCATED (set); s->num_ordinary_maps_used = LINEMAPS_ORDINARY_USED (set); s->ordinary_maps_allocated_size = ordinary_maps_allocated_size; s->ordinary_maps_used_size = ordinary_maps_used_size; s->num_expanded_macros = num_expanded_macros_counter; s->num_macro_tokens = num_macro_tokens_counter; s->num_macro_maps_used = LINEMAPS_MACRO_USED (set); s->macro_maps_allocated_size = macro_maps_allocated_size; s->macro_maps_locations_size = macro_maps_locations_size; s->macro_maps_used_size = macro_maps_used_size; s->duplicated_macro_maps_locations_size = duplicated_macro_maps_locations_size; } /* Dump line table SET to STREAM. If STREAM is NULL, stderr is used. NUM_ORDINARY specifies how many ordinary maps to dump. NUM_MACRO specifies how many macro maps to dump. */ void line_table_dump (FILE *stream, struct line_maps *set, unsigned int num_ordinary, unsigned int num_macro) { unsigned int i; if (set == NULL) return; if (stream == NULL) stream = stderr; fprintf (stream, "# of ordinary maps: %d\n", LINEMAPS_ORDINARY_USED (set)); fprintf (stream, "# of macro maps: %d\n", LINEMAPS_MACRO_USED (set)); fprintf (stream, "Include stack depth: %d\n", set->depth); fprintf (stream, "Highest location: %u\n", set->highest_location); if (num_ordinary) { fprintf (stream, "\nOrdinary line maps\n"); for (i = 0; i < num_ordinary && i < LINEMAPS_ORDINARY_USED (set); i++) linemap_dump (stream, set, i, false); fprintf (stream, "\n"); } if (num_macro) { fprintf (stream, "\nMacro line maps\n"); for (i = 0; i < num_macro && i < LINEMAPS_MACRO_USED (set); i++) linemap_dump (stream, set, i, true); fprintf (stream, "\n"); } }
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