1945 lines
65 KiB
C++
1945 lines
65 KiB
C++
/* Map (unsigned int) keys to (source file, line, column) triples.
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Copyright (C) 2001-2018 Free Software Foundation, Inc.
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This program is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by the
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Free Software Foundation; either version 3, or (at your option) any
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later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; see the file COPYING3. If not see
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<http://www.gnu.org/licenses/>.
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In other words, you are welcome to use, share and improve this program.
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You are forbidden to forbid anyone else to use, share and improve
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what you give them. Help stamp out software-hoarding! */
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#ifndef LIBCPP_LINE_MAP_H
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#define LIBCPP_LINE_MAP_H
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#ifndef GTY
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#define GTY(x) /* nothing */
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#endif
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/* Both gcc and emacs number source *lines* starting at 1, but
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they have differing conventions for *columns*.
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GCC uses a 1-based convention for source columns,
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whereas Emacs's M-x column-number-mode uses a 0-based convention.
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For example, an error in the initial, left-hand
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column of source line 3 is reported by GCC as:
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some-file.c:3:1: error: ...etc...
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On navigating to the location of that error in Emacs
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(e.g. via "next-error"),
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the locus is reported in the Mode Line
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(assuming M-x column-number-mode) as:
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some-file.c 10% (3, 0)
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i.e. "3:1:" in GCC corresponds to "(3, 0)" in Emacs. */
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/* The type of line numbers. */
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typedef unsigned int linenum_type;
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/* A function for for use by qsort for comparing line numbers. */
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inline int compare (linenum_type lhs, linenum_type rhs)
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{
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/* Avoid truncation issues by using long long for the comparison,
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and only consider the sign of the result. */
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long long diff = (long long)lhs - (long long)rhs;
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if (diff)
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return diff > 0 ? 1 : -1;
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return 0;
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}
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/* Reason for creating a new line map with linemap_add. LC_ENTER is
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when including a new file, e.g. a #include directive in C.
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LC_LEAVE is when reaching a file's end. LC_RENAME is when a file
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name or line number changes for neither of the above reasons
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(e.g. a #line directive in C); LC_RENAME_VERBATIM is like LC_RENAME
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but a filename of "" is not specially interpreted as standard
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input. LC_ENTER_MACRO is when a macro expansion is about to start. */
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enum lc_reason
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{
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LC_ENTER = 0,
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LC_LEAVE,
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LC_RENAME,
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LC_RENAME_VERBATIM,
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LC_ENTER_MACRO
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/* FIXME: add support for stringize and paste. */
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};
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/* The typedef "source_location" is a key within the location database,
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identifying a source location or macro expansion, along with range
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information, and (optionally) a pointer for use by gcc.
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This key only has meaning in relation to a line_maps instance. Within
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gcc there is a single line_maps instance: "line_table", declared in
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gcc/input.h and defined in gcc/input.c.
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The values of the keys are intended to be internal to libcpp,
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but for ease-of-understanding the implementation, they are currently
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assigned as follows:
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Actual | Value | Meaning
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-----------+-------------------------------+-------------------------------
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0x00000000 | UNKNOWN_LOCATION (gcc/input.h)| Unknown/invalid location.
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-----------+-------------------------------+-------------------------------
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0x00000001 | BUILTINS_LOCATION | The location for declarations
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| (gcc/input.h) | in "<built-in>"
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-----------+-------------------------------+-------------------------------
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0x00000002 | RESERVED_LOCATION_COUNT | The first location to be
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| (also | handed out, and the
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| ordmap[0]->start_location) | first line in ordmap 0
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-----------+-------------------------------+-------------------------------
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| ordmap[1]->start_location | First line in ordmap 1
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| ordmap[1]->start_location+32 | First column in that line
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| (assuming range_bits == 5) |
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| ordmap[1]->start_location+64 | 2nd column in that line
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| ordmap[1]->start_location+4096| Second line in ordmap 1
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| (assuming column_bits == 12)
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| Subsequent lines are offset by (1 << column_bits),
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| e.g. 4096 for 12 bits, with a column value of 0 representing
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| "the whole line".
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| Within a line, the low "range_bits" (typically 5) are used for
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| storing short ranges, so that there's an offset of
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| (1 << range_bits) between individual columns within a line,
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| typically 32.
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| The low range_bits store the offset of the end point from the
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| start point, and the start point is found by masking away
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| the range bits.
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| For example:
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| ordmap[1]->start_location+64 "2nd column in that line"
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| above means a caret at that location, with a range
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| starting and finishing at the same place (the range bits
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| are 0), a range of length 1.
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| By contrast:
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| ordmap[1]->start_location+68
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| has range bits 0x4, meaning a caret with a range starting at
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| that location, but with endpoint 4 columns further on: a range
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| of length 5.
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| Ranges that have caret != start, or have an endpoint too
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| far away to fit in range_bits are instead stored as ad-hoc
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| locations. Hence for range_bits == 5 we can compactly store
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| tokens of length <= 32 without needing to use the ad-hoc
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| table.
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| This packing scheme means we effectively have
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| (column_bits - range_bits)
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| of bits for the columns, typically (12 - 5) = 7, for 128
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| columns; longer line widths are accomodated by starting a
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| new ordmap with a higher column_bits.
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| ordmap[2]->start_location-1 | Final location in ordmap 1
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-----------+-------------------------------+-------------------------------
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| ordmap[2]->start_location | First line in ordmap 2
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| ordmap[3]->start_location-1 | Final location in ordmap 2
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-----------+-------------------------------+-------------------------------
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| | (etc)
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-----------+-------------------------------+-------------------------------
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| ordmap[n-1]->start_location | First line in final ord map
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| | (etc)
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| set->highest_location - 1 | Final location in that ordmap
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-----------+-------------------------------+-------------------------------
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| set->highest_location | Location of the where the next
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| | ordinary linemap would start
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-----------+-------------------------------+-------------------------------
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| |
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| VVVVVVVVVVVVVVVVVVVVVVVVVVV
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| Ordinary maps grow this way
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| (unallocated integers)
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0x60000000 | LINE_MAP_MAX_LOCATION_WITH_COLS
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| Beyond this point, ordinary linemaps have 0 bits per column:
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| each increment of the value corresponds to a new source line.
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0x70000000 | LINE_MAP_MAX_SOURCE_LOCATION
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| Beyond the point, we give up on ordinary maps; attempts to
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| create locations in them lead to UNKNOWN_LOCATION (0).
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| (unallocated integers)
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| Macro maps grow this way
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| ^^^^^^^^^^^^^^^^^^^^^^^^
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| |
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-----------+-------------------------------+-------------------------------
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| LINEMAPS_MACRO_LOWEST_LOCATION| Locations within macro maps
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| macromap[m-1]->start_location | Start of last macro map
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-----------+-------------------------------+-------------------------------
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| macromap[m-2]->start_location | Start of penultimate macro map
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-----------+-------------------------------+-------------------------------
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| macromap[1]->start_location | Start of macro map 1
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-----------+-------------------------------+-------------------------------
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| macromap[0]->start_location | Start of macro map 0
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0x7fffffff | MAX_SOURCE_LOCATION | Also used as a mask for
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| | accessing the ad-hoc data table
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-----------+-------------------------------+-------------------------------
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0x80000000 | Start of ad-hoc values; the lower 31 bits are used as an index
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... | into the line_table->location_adhoc_data_map.data array.
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0xffffffff | UINT_MAX |
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-----------+-------------------------------+-------------------------------
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Examples of location encoding.
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Packed ranges
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=============
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Consider encoding the location of a token "foo", seen underlined here
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on line 523, within an ordinary line_map that starts at line 500:
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11111111112
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12345678901234567890
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522
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523 return foo + bar;
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^~~
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524
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The location's caret and start are both at line 523, column 11; the
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location's finish is on the same line, at column 13 (an offset of 2
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columns, for length 3).
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Line 523 is offset 23 from the starting line of the ordinary line_map.
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caret == start, and the offset of the finish fits within 5 bits, so
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this can be stored as a packed range.
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This is encoded as:
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ordmap->start
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+ (line_offset << ordmap->m_column_and_range_bits)
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+ (column << ordmap->m_range_bits)
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+ (range_offset);
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i.e. (for line offset 23, column 11, range offset 2):
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ordmap->start
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+ (23 << 12)
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+ (11 << 5)
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+ 2;
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i.e.:
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ordmap->start + 0x17162
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assuming that the line_map uses the default of 7 bits for columns and
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5 bits for packed range (giving 12 bits for m_column_and_range_bits).
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"Pure" locations
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================
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These are a special case of the above, where
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caret == start == finish
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They are stored as packed ranges with offset == 0.
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For example, the location of the "f" of "foo" could be stored
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as above, but with range offset 0, giving:
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ordmap->start
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+ (23 << 12)
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+ (11 << 5)
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+ 0;
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i.e.:
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ordmap->start + 0x17160
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Unoptimized ranges
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==================
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Consider encoding the location of the binary expression
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below:
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11111111112
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12345678901234567890
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522
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523 return foo + bar;
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~~~~^~~~~
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524
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The location's caret is at the "+", line 523 column 15, but starts
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earlier, at the "f" of "foo" at column 11. The finish is at the "r"
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of "bar" at column 19.
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This can't be stored as a packed range since start != caret.
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Hence it is stored as an ad-hoc location e.g. 0x80000003.
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Stripping off the top bit gives us an index into the ad-hoc
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lookaside table:
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line_table->location_adhoc_data_map.data[0x3]
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from which the caret, start and finish can be looked up,
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encoded as "pure" locations:
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start == ordmap->start + (23 << 12) + (11 << 5)
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== ordmap->start + 0x17160 (as above; the "f" of "foo")
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caret == ordmap->start + (23 << 12) + (15 << 5)
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== ordmap->start + 0x171e0
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finish == ordmap->start + (23 << 12) + (19 << 5)
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== ordmap->start + 0x17260
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To further see how source_location works in practice, see the
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worked example in libcpp/location-example.txt. */
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typedef unsigned int source_location;
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/* Do not track column numbers higher than this one. As a result, the
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range of column_bits is [12, 18] (or 0 if column numbers are
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disabled). */
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const unsigned int LINE_MAP_MAX_COLUMN_NUMBER = (1U << 12);
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/* Do not pack ranges if locations get higher than this.
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If you change this, update:
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gcc.dg/plugin/location-overflow-test-*.c. */
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const source_location LINE_MAP_MAX_LOCATION_WITH_PACKED_RANGES = 0x50000000;
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/* Do not track column numbers if locations get higher than this.
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If you change this, update:
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gcc.dg/plugin/location-overflow-test-*.c. */
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const source_location LINE_MAP_MAX_LOCATION_WITH_COLS = 0x60000000;
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/* A range of source locations.
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Ranges are closed:
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m_start is the first location within the range,
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m_finish is the last location within the range.
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We may need a more compact way to store these, but for now,
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let's do it the simple way, as a pair. */
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struct GTY(()) source_range
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{
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source_location m_start;
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source_location m_finish;
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/* We avoid using constructors, since various structs that
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don't yet have constructors will embed instances of
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source_range. */
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/* Make a source_range from a source_location. */
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static source_range from_location (source_location loc)
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{
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source_range result;
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result.m_start = loc;
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result.m_finish = loc;
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return result;
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}
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/* Make a source_range from a pair of source_location. */
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static source_range from_locations (source_location start,
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source_location finish)
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{
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source_range result;
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result.m_start = start;
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result.m_finish = finish;
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return result;
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}
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};
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/* Memory allocation function typedef. Works like xrealloc. */
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typedef void *(*line_map_realloc) (void *, size_t);
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/* Memory allocator function that returns the actual allocated size,
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for a given requested allocation. */
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typedef size_t (*line_map_round_alloc_size_func) (size_t);
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/* A line_map encodes a sequence of locations.
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There are two kinds of maps. Ordinary maps and macro expansion
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maps, a.k.a macro maps.
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A macro map encodes source locations of tokens that are part of a
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macro replacement-list, at a macro expansion point. E.g, in:
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#define PLUS(A,B) A + B
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No macro map is going to be created there, because we are not at a
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macro expansion point. We are at a macro /definition/ point. So the
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locations of the tokens of the macro replacement-list (i.e, A + B)
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will be locations in an ordinary map, not a macro map.
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On the other hand, if we later do:
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int a = PLUS (1,2);
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The invocation of PLUS here is a macro expansion. So we are at a
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macro expansion point. The preprocessor expands PLUS (1,2) and
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replaces it with the tokens of its replacement-list: 1 + 2. A macro
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map is going to be created to hold (or rather to map, haha ...) the
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locations of the tokens 1, + and 2. The macro map also records the
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location of the expansion point of PLUS. That location is mapped in
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the map that is active right before the location of the invocation
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of PLUS. */
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struct GTY((tag ("0"), desc ("%h.reason == LC_ENTER_MACRO ? 2 : 1"))) line_map {
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source_location start_location;
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/* The reason for creation of this line map. */
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ENUM_BITFIELD (lc_reason) reason : CHAR_BIT;
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};
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/* An ordinary line map encodes physical source locations. Those
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physical source locations are called "spelling locations".
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Physical source file TO_FILE at line TO_LINE at column 0 is represented
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by the logical START_LOCATION. TO_LINE+L at column C is represented by
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START_LOCATION+(L*(1<<m_column_and_range_bits))+(C*1<<m_range_bits), as
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long as C<(1<<effective range bits), and the result_location is less than
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the next line_map's start_location.
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(The top line is line 1 and the leftmost column is column 1; line/column 0
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means "entire file/line" or "unknown line/column" or "not applicable".)
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The highest possible source location is MAX_SOURCE_LOCATION. */
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struct GTY((tag ("1"))) line_map_ordinary : public line_map {
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const char *to_file;
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linenum_type to_line;
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/* An index into the set that gives the line mapping at whose end
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the current one was included. File(s) at the bottom of the
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include stack have this set to -1. */
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int included_from;
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/* SYSP is one for a system header, two for a C system header file
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that therefore needs to be extern "C" protected in C++, and zero
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otherwise. This field isn't really needed now that it's in
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cpp_buffer. */
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unsigned char sysp;
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/* Number of the low-order source_location bits used for column numbers
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and ranges. */
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unsigned int m_column_and_range_bits : 8;
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/* Number of the low-order "column" bits used for storing short ranges
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inline, rather than in the ad-hoc table.
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MSB LSB
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31 0
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+-------------------------+-------------------------------------------+
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| |<---map->column_and_range_bits (e.g. 12)-->|
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+-------------------------+-----------------------+-------------------+
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| | column_and_range_bits | map->range_bits |
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| | - range_bits | |
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+-------------------------+-----------------------+-------------------+
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| row bits | effective column bits | short range bits |
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| | (e.g. 7) | (e.g. 5) |
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+-------------------------+-----------------------+-------------------+ */
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unsigned int m_range_bits : 8;
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};
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/* This is the highest possible source location encoded within an
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ordinary or macro map. */
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const source_location MAX_SOURCE_LOCATION = 0x7FFFFFFF;
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struct cpp_hashnode;
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/* A macro line map encodes location of tokens coming from a macro
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expansion.
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The offset from START_LOCATION is used to index into
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MACRO_LOCATIONS; this holds the original location of the token. */
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struct GTY((tag ("2"))) line_map_macro : public line_map {
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/* The cpp macro which expansion gave birth to this macro map. */
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struct cpp_hashnode * GTY ((nested_ptr (union tree_node,
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"%h ? CPP_HASHNODE (GCC_IDENT_TO_HT_IDENT (%h)) : NULL",
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"%h ? HT_IDENT_TO_GCC_IDENT (HT_NODE (%h)) : NULL")))
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macro;
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/* The number of tokens inside the replacement-list of MACRO. */
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unsigned int n_tokens;
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/* This array of location is actually an array of pairs of
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locations. The elements inside it thus look like:
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x0,y0, x1,y1, x2,y2, ...., xn,yn.
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where n == n_tokens;
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Remember that these xI,yI are collected when libcpp is about to
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expand a given macro.
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yI is the location in the macro definition, either of the token
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itself or of a macro parameter that it replaces.
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Imagine this:
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#define PLUS(A, B) A + B <--- #1
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int a = PLUS (1,2); <--- #2
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There is a macro map for the expansion of PLUS in #2. PLUS is
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expanded into its expansion-list. The expansion-list is the
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replacement-list of PLUS where the macro parameters are replaced
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with their arguments. So the replacement-list of PLUS is made of
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the tokens:
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A, +, B
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and the expansion-list is made of the tokens:
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1, +, 2
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Let's consider the case of token "+". Its y1 [yI for I == 1] is
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its spelling location in #1.
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y0 (thus for token "1") is the spelling location of A in #1.
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And y2 (of token "2") is the spelling location of B in #1.
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When the token is /not/ an argument for a macro, xI is the same
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location as yI. Otherwise, xI is the location of the token
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outside this macro expansion. If this macro was expanded from
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another macro expansion, xI is a virtual location representing
|
|
the token in that macro expansion; otherwise, it is the spelling
|
|
location of the token.
|
|
|
|
Note that a virtual location is a location returned by
|
|
linemap_add_macro_token. It encodes the relevant locations (x,y
|
|
pairs) of that token across the macro expansions from which it
|
|
(the token) might come from.
|
|
|
|
In the example above x1 (for token "+") is going to be the same
|
|
as y1. x0 is the spelling location for the argument token "1",
|
|
and x2 is the spelling location for the argument token "2". */
|
|
source_location * GTY((atomic)) macro_locations;
|
|
|
|
/* This is the location of the expansion point of the current macro
|
|
map. It's the location of the macro name. That location is held
|
|
by the map that was current right before the current one. It
|
|
could have been either a macro or an ordinary map, depending on
|
|
if we are in a nested expansion context not. */
|
|
source_location expansion;
|
|
};
|
|
|
|
#if CHECKING_P && (GCC_VERSION >= 2007)
|
|
|
|
/* Assertion macro to be used in line-map code. */
|
|
#define linemap_assert(EXPR) \
|
|
do { \
|
|
if (! (EXPR)) \
|
|
abort (); \
|
|
} while (0)
|
|
|
|
/* Assert that becomes a conditional expression when checking is disabled at
|
|
compilation time. Use this for conditions that should not happen but if
|
|
they happen, it is better to handle them gracefully rather than crash
|
|
randomly later.
|
|
Usage:
|
|
|
|
if (linemap_assert_fails(EXPR)) handle_error(); */
|
|
#define linemap_assert_fails(EXPR) __extension__ \
|
|
({linemap_assert (EXPR); false;})
|
|
|
|
#else
|
|
/* Include EXPR, so that unused variable warnings do not occur. */
|
|
#define linemap_assert(EXPR) ((void)(0 && (EXPR)))
|
|
#define linemap_assert_fails(EXPR) (! (EXPR))
|
|
#endif
|
|
|
|
/* 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 *);
|
|
|
|
/* Assert that MAP encodes locations of tokens that are not part of
|
|
the replacement-list of a macro expansion, downcasting from
|
|
line_map * to line_map_ordinary *. */
|
|
|
|
inline line_map_ordinary *
|
|
linemap_check_ordinary (struct line_map *map)
|
|
{
|
|
linemap_assert (!linemap_macro_expansion_map_p (map));
|
|
return (line_map_ordinary *)map;
|
|
}
|
|
|
|
/* Assert that MAP encodes locations of tokens that are not part of
|
|
the replacement-list of a macro expansion, downcasting from
|
|
const line_map * to const line_map_ordinary *. */
|
|
|
|
inline const line_map_ordinary *
|
|
linemap_check_ordinary (const struct line_map *map)
|
|
{
|
|
linemap_assert (!linemap_macro_expansion_map_p (map));
|
|
return (const line_map_ordinary *)map;
|
|
}
|
|
|
|
/* Assert that MAP is a macro expansion and downcast to the appropriate
|
|
subclass. */
|
|
|
|
inline line_map_macro *linemap_check_macro (line_map *map)
|
|
{
|
|
linemap_assert (linemap_macro_expansion_map_p (map));
|
|
return (line_map_macro *)map;
|
|
}
|
|
|
|
/* Assert that MAP is a macro expansion and downcast to the appropriate
|
|
subclass. */
|
|
|
|
inline const line_map_macro *
|
|
linemap_check_macro (const line_map *map)
|
|
{
|
|
linemap_assert (linemap_macro_expansion_map_p (map));
|
|
return (const line_map_macro *)map;
|
|
}
|
|
|
|
/* Read the start location of MAP. */
|
|
|
|
inline source_location
|
|
MAP_START_LOCATION (const line_map *map)
|
|
{
|
|
return map->start_location;
|
|
}
|
|
|
|
/* Get the starting line number of ordinary map MAP. */
|
|
|
|
inline linenum_type
|
|
ORDINARY_MAP_STARTING_LINE_NUMBER (const line_map_ordinary *ord_map)
|
|
{
|
|
return ord_map->to_line;
|
|
}
|
|
|
|
/* Get the index of the ordinary map at whose end
|
|
ordinary map MAP was included.
|
|
|
|
File(s) at the bottom of the include stack have this set. */
|
|
|
|
inline int
|
|
ORDINARY_MAP_INCLUDER_FILE_INDEX (const line_map_ordinary *ord_map)
|
|
{
|
|
return ord_map->included_from;
|
|
}
|
|
|
|
/* Return a positive value if map encodes locations from a system
|
|
header, 0 otherwise. Returns 1 if ordinary map MAP encodes locations
|
|
in a system header and 2 if it encodes locations in a C system header
|
|
that therefore needs to be extern "C" protected in C++. */
|
|
|
|
inline unsigned char
|
|
ORDINARY_MAP_IN_SYSTEM_HEADER_P (const line_map_ordinary *ord_map)
|
|
{
|
|
return ord_map->sysp;
|
|
}
|
|
|
|
/* Get the filename of ordinary map MAP. */
|
|
|
|
inline const char *
|
|
ORDINARY_MAP_FILE_NAME (const line_map_ordinary *ord_map)
|
|
{
|
|
return ord_map->to_file;
|
|
}
|
|
|
|
/* Get the cpp macro whose expansion gave birth to macro map MAP. */
|
|
|
|
inline cpp_hashnode *
|
|
MACRO_MAP_MACRO (const line_map_macro *macro_map)
|
|
{
|
|
return macro_map->macro;
|
|
}
|
|
|
|
/* Get the number of tokens inside the replacement-list of the macro
|
|
that led to macro map MAP. */
|
|
|
|
inline unsigned int
|
|
MACRO_MAP_NUM_MACRO_TOKENS (const line_map_macro *macro_map)
|
|
{
|
|
return macro_map->n_tokens;
|
|
}
|
|
|
|
/* Get the array of pairs of locations within macro map MAP.
|
|
See the declaration of line_map_macro for more information. */
|
|
|
|
inline source_location *
|
|
MACRO_MAP_LOCATIONS (const line_map_macro *macro_map)
|
|
{
|
|
return macro_map->macro_locations;
|
|
}
|
|
|
|
/* Get the location of the expansion point of the macro map MAP. */
|
|
|
|
inline source_location
|
|
MACRO_MAP_EXPANSION_POINT_LOCATION (const line_map_macro *macro_map)
|
|
{
|
|
return macro_map->expansion;
|
|
}
|
|
|
|
/* The abstraction of a set of location maps. There can be several
|
|
types of location maps. This abstraction contains the attributes
|
|
that are independent from the type of the map.
|
|
|
|
Essentially this is just a vector of T_linemap_subclass,
|
|
which can only ever grow in size. */
|
|
|
|
struct GTY(()) maps_info_ordinary {
|
|
/* This array contains the "ordinary" line maps, for all
|
|
events other than macro expansion
|
|
(e.g. when a new preprocessing unit starts or ends). */
|
|
line_map_ordinary * GTY ((length ("%h.used"))) maps;
|
|
|
|
/* The total number of allocated maps. */
|
|
unsigned int allocated;
|
|
|
|
/* The number of elements used in maps. This number is smaller
|
|
or equal to ALLOCATED. */
|
|
unsigned int used;
|
|
|
|
unsigned int cache;
|
|
};
|
|
|
|
struct GTY(()) maps_info_macro {
|
|
/* This array contains the macro line maps.
|
|
A macro line map is created whenever a macro expansion occurs. */
|
|
line_map_macro * GTY ((length ("%h.used"))) maps;
|
|
|
|
/* The total number of allocated maps. */
|
|
unsigned int allocated;
|
|
|
|
/* The number of elements used in maps. This number is smaller
|
|
or equal to ALLOCATED. */
|
|
unsigned int used;
|
|
|
|
unsigned int cache;
|
|
};
|
|
|
|
/* Data structure to associate a source_range together with an arbitrary
|
|
data pointer with a source location. */
|
|
struct GTY(()) location_adhoc_data {
|
|
source_location locus;
|
|
source_range src_range;
|
|
void * GTY((skip)) data;
|
|
};
|
|
|
|
struct htab;
|
|
|
|
/* The following data structure encodes a location with some adhoc data
|
|
and maps it to a new unsigned integer (called an adhoc location)
|
|
that replaces the original location to represent the mapping.
|
|
|
|
The new adhoc_loc uses the highest bit as the enabling bit, i.e. if the
|
|
highest bit is 1, then the number is adhoc_loc. Otherwise, it serves as
|
|
the original location. Once identified as the adhoc_loc, the lower 31
|
|
bits of the integer is used to index the location_adhoc_data array,
|
|
in which the locus and associated data is stored. */
|
|
|
|
struct GTY(()) location_adhoc_data_map {
|
|
struct htab * GTY((skip)) htab;
|
|
source_location curr_loc;
|
|
unsigned int allocated;
|
|
struct location_adhoc_data GTY((length ("%h.allocated"))) *data;
|
|
};
|
|
|
|
/* A set of chronological line_map structures. */
|
|
struct GTY(()) line_maps {
|
|
|
|
~line_maps ();
|
|
|
|
maps_info_ordinary info_ordinary;
|
|
|
|
maps_info_macro info_macro;
|
|
|
|
/* Depth of the include stack, including the current file. */
|
|
unsigned int depth;
|
|
|
|
/* If true, prints an include trace a la -H. */
|
|
bool trace_includes;
|
|
|
|
/* Highest source_location "given out". */
|
|
source_location highest_location;
|
|
|
|
/* Start of line of highest source_location "given out". */
|
|
source_location highest_line;
|
|
|
|
/* The maximum column number we can quickly allocate. Higher numbers
|
|
may require allocating a new line_map. */
|
|
unsigned int max_column_hint;
|
|
|
|
/* If non-null, the allocator to use when resizing 'maps'. If null,
|
|
xrealloc is used. */
|
|
line_map_realloc reallocator;
|
|
|
|
/* The allocators' function used to know the actual size it
|
|
allocated, for a certain allocation size requested. */
|
|
line_map_round_alloc_size_func round_alloc_size;
|
|
|
|
struct location_adhoc_data_map location_adhoc_data_map;
|
|
|
|
/* The special location value that is used as spelling location for
|
|
built-in tokens. */
|
|
source_location builtin_location;
|
|
|
|
/* True if we've seen a #line or # 44 "file" directive. */
|
|
bool seen_line_directive;
|
|
|
|
/* The default value of range_bits in ordinary line maps. */
|
|
unsigned int default_range_bits;
|
|
|
|
unsigned int num_optimized_ranges;
|
|
unsigned int num_unoptimized_ranges;
|
|
};
|
|
|
|
/* Returns the number of allocated maps so far. MAP_KIND shall be TRUE
|
|
if we are interested in macro maps, FALSE otherwise. */
|
|
inline unsigned int
|
|
LINEMAPS_ALLOCATED (const line_maps *set, bool map_kind)
|
|
{
|
|
if (map_kind)
|
|
return set->info_macro.allocated;
|
|
else
|
|
return set->info_ordinary.allocated;
|
|
}
|
|
|
|
/* As above, but by reference (e.g. as an lvalue). */
|
|
|
|
inline unsigned int &
|
|
LINEMAPS_ALLOCATED (line_maps *set, bool map_kind)
|
|
{
|
|
if (map_kind)
|
|
return set->info_macro.allocated;
|
|
else
|
|
return set->info_ordinary.allocated;
|
|
}
|
|
|
|
/* Returns the number of used maps so far. MAP_KIND shall be TRUE if
|
|
we are interested in macro maps, FALSE otherwise.*/
|
|
inline unsigned int
|
|
LINEMAPS_USED (const line_maps *set, bool map_kind)
|
|
{
|
|
if (map_kind)
|
|
return set->info_macro.used;
|
|
else
|
|
return set->info_ordinary.used;
|
|
}
|
|
|
|
/* As above, but by reference (e.g. as an lvalue). */
|
|
|
|
inline unsigned int &
|
|
LINEMAPS_USED (line_maps *set, bool map_kind)
|
|
{
|
|
if (map_kind)
|
|
return set->info_macro.used;
|
|
else
|
|
return set->info_ordinary.used;
|
|
}
|
|
|
|
/* Returns the index of the last map that was looked up with
|
|
linemap_lookup. MAP_KIND shall be TRUE if we are interested in
|
|
macro maps, FALSE otherwise. */
|
|
inline unsigned int
|
|
LINEMAPS_CACHE (const line_maps *set, bool map_kind)
|
|
{
|
|
if (map_kind)
|
|
return set->info_macro.cache;
|
|
else
|
|
return set->info_ordinary.cache;
|
|
}
|
|
|
|
/* As above, but by reference (e.g. as an lvalue). */
|
|
|
|
inline unsigned int &
|
|
LINEMAPS_CACHE (line_maps *set, bool map_kind)
|
|
{
|
|
if (map_kind)
|
|
return set->info_macro.cache;
|
|
else
|
|
return set->info_ordinary.cache;
|
|
}
|
|
|
|
/* Return the map at a given index. */
|
|
inline line_map *
|
|
LINEMAPS_MAP_AT (const line_maps *set, bool map_kind, int index)
|
|
{
|
|
if (map_kind)
|
|
return &set->info_macro.maps[index];
|
|
else
|
|
return &set->info_ordinary.maps[index];
|
|
}
|
|
|
|
/* Returns the last map used in the line table SET. MAP_KIND
|
|
shall be TRUE if we are interested in macro maps, FALSE
|
|
otherwise.*/
|
|
inline line_map *
|
|
LINEMAPS_LAST_MAP (const line_maps *set, bool map_kind)
|
|
{
|
|
return LINEMAPS_MAP_AT (set, map_kind,
|
|
LINEMAPS_USED (set, map_kind) - 1);
|
|
}
|
|
|
|
/* Returns the last map that was allocated in the line table SET.
|
|
MAP_KIND shall be TRUE if we are interested in macro maps, FALSE
|
|
otherwise.*/
|
|
inline line_map *
|
|
LINEMAPS_LAST_ALLOCATED_MAP (const line_maps *set, bool map_kind)
|
|
{
|
|
return LINEMAPS_MAP_AT (set, map_kind,
|
|
LINEMAPS_ALLOCATED (set, map_kind) - 1);
|
|
}
|
|
|
|
/* Returns a pointer to the memory region where ordinary maps are
|
|
allocated in the line table SET. */
|
|
inline line_map_ordinary *
|
|
LINEMAPS_ORDINARY_MAPS (const line_maps *set)
|
|
{
|
|
return set->info_ordinary.maps;
|
|
}
|
|
|
|
/* Returns the INDEXth ordinary map. */
|
|
inline line_map_ordinary *
|
|
LINEMAPS_ORDINARY_MAP_AT (const line_maps *set, int index)
|
|
{
|
|
linemap_assert (index >= 0);
|
|
linemap_assert ((unsigned int)index < set->info_ordinary.used);
|
|
return &set->info_ordinary.maps[index];
|
|
}
|
|
|
|
/* Return the number of ordinary maps allocated in the line table
|
|
SET. */
|
|
inline unsigned int
|
|
LINEMAPS_ORDINARY_ALLOCATED (const line_maps *set)
|
|
{
|
|
return LINEMAPS_ALLOCATED (set, false);
|
|
}
|
|
|
|
/* Return the number of ordinary maps used in the line table SET. */
|
|
inline unsigned int
|
|
LINEMAPS_ORDINARY_USED (const line_maps *set)
|
|
{
|
|
return LINEMAPS_USED (set, false);
|
|
}
|
|
|
|
/* Return the index of the last ordinary map that was looked up with
|
|
linemap_lookup. */
|
|
inline unsigned int
|
|
LINEMAPS_ORDINARY_CACHE (const line_maps *set)
|
|
{
|
|
return LINEMAPS_CACHE (set, false);
|
|
}
|
|
|
|
/* As above, but by reference (e.g. as an lvalue). */
|
|
|
|
inline unsigned int &
|
|
LINEMAPS_ORDINARY_CACHE (line_maps *set)
|
|
{
|
|
return LINEMAPS_CACHE (set, false);
|
|
}
|
|
|
|
/* Returns a pointer to the last ordinary map used in the line table
|
|
SET. */
|
|
inline line_map_ordinary *
|
|
LINEMAPS_LAST_ORDINARY_MAP (const line_maps *set)
|
|
{
|
|
return (line_map_ordinary *)LINEMAPS_LAST_MAP (set, false);
|
|
}
|
|
|
|
/* Returns a pointer to the last ordinary map allocated the line table
|
|
SET. */
|
|
inline line_map_ordinary *
|
|
LINEMAPS_LAST_ALLOCATED_ORDINARY_MAP (const line_maps *set)
|
|
{
|
|
return (line_map_ordinary *)LINEMAPS_LAST_ALLOCATED_MAP (set, false);
|
|
}
|
|
|
|
/* Returns a pointer to the beginning of the region where macro maps
|
|
are allocated. */
|
|
inline line_map_macro *
|
|
LINEMAPS_MACRO_MAPS (const line_maps *set)
|
|
{
|
|
return set->info_macro.maps;
|
|
}
|
|
|
|
/* Returns the INDEXth macro map. */
|
|
inline line_map_macro *
|
|
LINEMAPS_MACRO_MAP_AT (const line_maps *set, int index)
|
|
{
|
|
linemap_assert (index >= 0);
|
|
linemap_assert ((unsigned int)index < set->info_macro.used);
|
|
return &set->info_macro.maps[index];
|
|
}
|
|
|
|
/* Returns the number of macro maps that were allocated in the line
|
|
table SET. */
|
|
inline unsigned int
|
|
LINEMAPS_MACRO_ALLOCATED (const line_maps *set)
|
|
{
|
|
return LINEMAPS_ALLOCATED (set, true);
|
|
}
|
|
|
|
/* Returns the number of macro maps used in the line table SET. */
|
|
inline unsigned int
|
|
LINEMAPS_MACRO_USED (const line_maps *set)
|
|
{
|
|
return LINEMAPS_USED (set, true);
|
|
}
|
|
|
|
/* Returns the index of the last macro map looked up with
|
|
linemap_lookup. */
|
|
inline unsigned int
|
|
LINEMAPS_MACRO_CACHE (const line_maps *set)
|
|
{
|
|
return LINEMAPS_CACHE (set, true);
|
|
}
|
|
|
|
/* As above, but by reference (e.g. as an lvalue). */
|
|
|
|
inline unsigned int &
|
|
LINEMAPS_MACRO_CACHE (line_maps *set)
|
|
{
|
|
return LINEMAPS_CACHE (set, true);
|
|
}
|
|
|
|
/* Returns the last macro map used in the line table SET. */
|
|
inline line_map_macro *
|
|
LINEMAPS_LAST_MACRO_MAP (const line_maps *set)
|
|
{
|
|
return (line_map_macro *)LINEMAPS_LAST_MAP (set, true);
|
|
}
|
|
|
|
/* Returns the lowest location [of a token resulting from macro
|
|
expansion] encoded in this line table. */
|
|
inline source_location
|
|
LINEMAPS_MACRO_LOWEST_LOCATION (const line_maps *set)
|
|
{
|
|
return LINEMAPS_MACRO_USED (set)
|
|
? MAP_START_LOCATION (LINEMAPS_LAST_MACRO_MAP (set))
|
|
: MAX_SOURCE_LOCATION;
|
|
}
|
|
|
|
/* Returns the last macro map allocated in the line table SET. */
|
|
inline line_map_macro *
|
|
LINEMAPS_LAST_ALLOCATED_MACRO_MAP (const line_maps *set)
|
|
{
|
|
return (line_map_macro *)LINEMAPS_LAST_ALLOCATED_MAP (set, true);
|
|
}
|
|
|
|
extern source_location get_combined_adhoc_loc (struct line_maps *,
|
|
source_location,
|
|
source_range,
|
|
void *);
|
|
extern void *get_data_from_adhoc_loc (struct line_maps *, source_location);
|
|
extern source_location get_location_from_adhoc_loc (struct line_maps *,
|
|
source_location);
|
|
|
|
extern source_range get_range_from_loc (line_maps *set, source_location loc);
|
|
|
|
/* Get whether location LOC is an ad-hoc location. */
|
|
|
|
inline bool
|
|
IS_ADHOC_LOC (source_location loc)
|
|
{
|
|
return (loc & MAX_SOURCE_LOCATION) != loc;
|
|
}
|
|
|
|
/* Get whether location LOC is a "pure" location, or
|
|
whether it is an ad-hoc location, or embeds range information. */
|
|
|
|
bool
|
|
pure_location_p (line_maps *set, source_location loc);
|
|
|
|
/* Given location LOC within SET, strip away any packed range information
|
|
or ad-hoc information. */
|
|
|
|
extern source_location get_pure_location (line_maps *set,
|
|
source_location loc);
|
|
|
|
/* Combine LOC and BLOCK, giving a combined adhoc location. */
|
|
|
|
inline source_location
|
|
COMBINE_LOCATION_DATA (struct line_maps *set,
|
|
source_location loc,
|
|
source_range src_range,
|
|
void *block)
|
|
{
|
|
return get_combined_adhoc_loc (set, loc, src_range, block);
|
|
}
|
|
|
|
extern void rebuild_location_adhoc_htab (struct line_maps *);
|
|
|
|
/* Initialize a line map set. SET is the line map set to initialize
|
|
and BUILTIN_LOCATION is the special location value to be used as
|
|
spelling location for built-in tokens. This BUILTIN_LOCATION has
|
|
to be strictly less than RESERVED_LOCATION_COUNT. */
|
|
extern void linemap_init (struct line_maps *set,
|
|
source_location builtin_location);
|
|
|
|
/* Check for and warn about line_maps entered but not exited. */
|
|
|
|
extern void linemap_check_files_exited (struct line_maps *);
|
|
|
|
/* 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). */
|
|
|
|
extern source_location linemap_line_start
|
|
(struct line_maps *set, linenum_type to_line, unsigned int max_column_hint);
|
|
|
|
/* Add a mapping of logical source line to physical source file and
|
|
line number. This function creates an "ordinary map", which is a
|
|
map that records locations of tokens that are not part of macro
|
|
replacement-lists present at a macro expansion point.
|
|
|
|
The text pointed to by TO_FILE must have a lifetime
|
|
at least as long as the lifetime of SET. 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.
|
|
|
|
A call to this function can relocate the previous set of
|
|
maps, so any stored line_map pointers should not be used. */
|
|
extern const struct line_map *linemap_add
|
|
(struct line_maps *, enum lc_reason, unsigned int sysp,
|
|
const char *to_file, linenum_type to_line);
|
|
|
|
/* Given a logical source location, returns the map which the
|
|
corresponding (source file, line, column) triplet can be deduced
|
|
from. 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. If no line map have been allocated yet, this
|
|
function returns NULL. */
|
|
extern const struct line_map *linemap_lookup
|
|
(struct line_maps *, source_location);
|
|
|
|
/* Returns TRUE if the line table set tracks token locations across
|
|
macro expansion, FALSE otherwise. */
|
|
bool linemap_tracks_macro_expansion_locs_p (struct line_maps *);
|
|
|
|
/* Return the name of the macro associated to MACRO_MAP. */
|
|
const char* linemap_map_get_macro_name (const line_map_macro *);
|
|
|
|
/* 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 *,
|
|
source_location);
|
|
|
|
/* Return TRUE if LOCATION is a source code location of a token that is part of
|
|
a macro expansion, FALSE otherwise. */
|
|
bool linemap_location_from_macro_expansion_p (const struct line_maps *,
|
|
source_location);
|
|
|
|
/* TRUE if LOCATION is a source code location of a token that is part of the
|
|
definition of a macro, FALSE otherwise. */
|
|
bool linemap_location_from_macro_definition_p (struct line_maps *,
|
|
source_location);
|
|
|
|
/* With the precondition that LOCATION is the locus of a token that is
|
|
an argument of a function-like macro MACRO_MAP and appears in the
|
|
expansion of MACRO_MAP, return the locus of that argument in the
|
|
context of the caller of MACRO_MAP. */
|
|
|
|
extern source_location linemap_macro_map_loc_unwind_toward_spelling
|
|
(line_maps *set, const line_map_macro *macro_map, source_location location);
|
|
|
|
/* source_location values from 0 to RESERVED_LOCATION_COUNT-1 will
|
|
be reserved for libcpp user as special values, no token from libcpp
|
|
will contain any of those locations. */
|
|
const source_location RESERVED_LOCATION_COUNT = 2;
|
|
|
|
/* Converts a map and a source_location to source line. */
|
|
inline linenum_type
|
|
SOURCE_LINE (const line_map_ordinary *ord_map, source_location loc)
|
|
{
|
|
return ((loc - ord_map->start_location)
|
|
>> ord_map->m_column_and_range_bits) + ord_map->to_line;
|
|
}
|
|
|
|
/* Convert a map and source_location to source column number. */
|
|
inline linenum_type
|
|
SOURCE_COLUMN (const line_map_ordinary *ord_map, source_location loc)
|
|
{
|
|
return ((loc - ord_map->start_location)
|
|
& ((1 << ord_map->m_column_and_range_bits) - 1)) >> ord_map->m_range_bits;
|
|
}
|
|
|
|
/* Return the location of the last source line within an ordinary
|
|
map. */
|
|
inline source_location
|
|
LAST_SOURCE_LINE_LOCATION (const line_map_ordinary *map)
|
|
{
|
|
return (((map[1].start_location - 1
|
|
- map->start_location)
|
|
& ~((1 << map->m_column_and_range_bits) - 1))
|
|
+ map->start_location);
|
|
}
|
|
|
|
/* Returns the last source line number within an ordinary map. This
|
|
is the (last) line of the #include, or other directive, that caused
|
|
a map change. */
|
|
inline linenum_type
|
|
LAST_SOURCE_LINE (const line_map_ordinary *map)
|
|
{
|
|
return SOURCE_LINE (map, LAST_SOURCE_LINE_LOCATION (map));
|
|
}
|
|
|
|
/* Return the last column number within an ordinary map. */
|
|
|
|
inline linenum_type
|
|
LAST_SOURCE_COLUMN (const line_map_ordinary *map)
|
|
{
|
|
return SOURCE_COLUMN (map, LAST_SOURCE_LINE_LOCATION (map));
|
|
}
|
|
|
|
/* Returns the map a given map was included from, or NULL if the map
|
|
belongs to the main file, i.e, a file that wasn't included by
|
|
another one. */
|
|
inline line_map_ordinary *
|
|
INCLUDED_FROM (struct line_maps *set, const line_map_ordinary *ord_map)
|
|
{
|
|
return ((ord_map->included_from == -1)
|
|
? NULL
|
|
: LINEMAPS_ORDINARY_MAP_AT (set, ord_map->included_from));
|
|
}
|
|
|
|
/* True if the map is at the bottom of the include stack. */
|
|
|
|
inline bool
|
|
MAIN_FILE_P (const line_map_ordinary *ord_map)
|
|
{
|
|
return ord_map->included_from < 0;
|
|
}
|
|
|
|
/* 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. */
|
|
extern source_location
|
|
linemap_position_for_column (struct line_maps *, unsigned int);
|
|
|
|
/* Encode and return a source location from a given line and
|
|
column. */
|
|
source_location
|
|
linemap_position_for_line_and_column (line_maps *set,
|
|
const line_map_ordinary *,
|
|
linenum_type, unsigned int);
|
|
|
|
/* Encode and return a source_location starting from location LOC and
|
|
shifting it by OFFSET columns. This function does not support
|
|
virtual locations. */
|
|
source_location
|
|
linemap_position_for_loc_and_offset (struct line_maps *set,
|
|
source_location loc,
|
|
unsigned int offset);
|
|
|
|
/* Return the file this map is for. */
|
|
inline const char *
|
|
LINEMAP_FILE (const line_map_ordinary *ord_map)
|
|
{
|
|
return ord_map->to_file;
|
|
}
|
|
|
|
/* Return the line number this map started encoding location from. */
|
|
inline linenum_type
|
|
LINEMAP_LINE (const line_map_ordinary *ord_map)
|
|
{
|
|
return ord_map->to_line;
|
|
}
|
|
|
|
/* Return a positive value if map encodes locations from a system
|
|
header, 0 otherwise. Returns 1 if MAP encodes locations in a
|
|
system header and 2 if it encodes locations in a C system header
|
|
that therefore needs to be extern "C" protected in C++. */
|
|
inline unsigned char
|
|
LINEMAP_SYSP (const line_map_ordinary *ord_map)
|
|
{
|
|
return ord_map->sysp;
|
|
}
|
|
|
|
/* 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);
|
|
|
|
/* Return TRUE if LOC_A denotes the location a token that comes
|
|
topogically before the token denoted by location LOC_B, or if they
|
|
are equal. */
|
|
inline bool
|
|
linemap_location_before_p (struct line_maps *set,
|
|
source_location loc_a,
|
|
source_location loc_b)
|
|
{
|
|
return linemap_compare_locations (set, loc_a, loc_b) >= 0;
|
|
}
|
|
|
|
typedef struct
|
|
{
|
|
/* The name of the source file involved. */
|
|
const char *file;
|
|
|
|
/* The line-location in the source file. */
|
|
int line;
|
|
|
|
int column;
|
|
|
|
void *data;
|
|
|
|
/* In a system header?. */
|
|
bool sysp;
|
|
} expanded_location;
|
|
|
|
/* A location within a rich_location: a caret&range, with
|
|
the caret potentially flagged for display. */
|
|
|
|
struct location_range
|
|
{
|
|
source_location m_loc;
|
|
|
|
/* Should a caret be drawn for this range? Typically this is
|
|
true for the 0th range, and false for subsequent ranges,
|
|
but the Fortran frontend overrides this for rendering things like:
|
|
|
|
x = x + y
|
|
1 2
|
|
Error: Shapes for operands at (1) and (2) are not conformable
|
|
|
|
where "1" and "2" are notionally carets. */
|
|
bool m_show_caret_p;
|
|
};
|
|
|
|
/* A partially-embedded vec for use within rich_location for storing
|
|
ranges and fix-it hints.
|
|
|
|
Elements [0..NUM_EMBEDDED) are allocated within m_embed, after
|
|
that they are within the dynamically-allocated m_extra.
|
|
|
|
This allows for static allocation in the common case, whilst
|
|
supporting the rarer case of an arbitrary number of elements.
|
|
|
|
Dynamic allocation is not performed unless it's needed. */
|
|
|
|
template <typename T, int NUM_EMBEDDED>
|
|
class semi_embedded_vec
|
|
{
|
|
public:
|
|
semi_embedded_vec ();
|
|
~semi_embedded_vec ();
|
|
|
|
unsigned int count () const { return m_num; }
|
|
T& operator[] (int idx);
|
|
const T& operator[] (int idx) const;
|
|
|
|
void push (const T&);
|
|
void truncate (int len);
|
|
|
|
private:
|
|
int m_num;
|
|
T m_embedded[NUM_EMBEDDED];
|
|
int m_alloc;
|
|
T *m_extra;
|
|
};
|
|
|
|
/* Constructor for semi_embedded_vec. In particular, no dynamic allocation
|
|
is done. */
|
|
|
|
template <typename T, int NUM_EMBEDDED>
|
|
semi_embedded_vec<T, NUM_EMBEDDED>::semi_embedded_vec ()
|
|
: m_num (0), m_alloc (0), m_extra (NULL)
|
|
{
|
|
}
|
|
|
|
/* semi_embedded_vec's dtor. Release any dynamically-allocated memory. */
|
|
|
|
template <typename T, int NUM_EMBEDDED>
|
|
semi_embedded_vec<T, NUM_EMBEDDED>::~semi_embedded_vec ()
|
|
{
|
|
XDELETEVEC (m_extra);
|
|
}
|
|
|
|
/* Look up element IDX, mutably. */
|
|
|
|
template <typename T, int NUM_EMBEDDED>
|
|
T&
|
|
semi_embedded_vec<T, NUM_EMBEDDED>::operator[] (int idx)
|
|
{
|
|
linemap_assert (idx < m_num);
|
|
if (idx < NUM_EMBEDDED)
|
|
return m_embedded[idx];
|
|
else
|
|
{
|
|
linemap_assert (m_extra != NULL);
|
|
return m_extra[idx - NUM_EMBEDDED];
|
|
}
|
|
}
|
|
|
|
/* Look up element IDX (const). */
|
|
|
|
template <typename T, int NUM_EMBEDDED>
|
|
const T&
|
|
semi_embedded_vec<T, NUM_EMBEDDED>::operator[] (int idx) const
|
|
{
|
|
linemap_assert (idx < m_num);
|
|
if (idx < NUM_EMBEDDED)
|
|
return m_embedded[idx];
|
|
else
|
|
{
|
|
linemap_assert (m_extra != NULL);
|
|
return m_extra[idx - NUM_EMBEDDED];
|
|
}
|
|
}
|
|
|
|
/* Append VALUE to the end of the semi_embedded_vec. */
|
|
|
|
template <typename T, int NUM_EMBEDDED>
|
|
void
|
|
semi_embedded_vec<T, NUM_EMBEDDED>::push (const T& value)
|
|
{
|
|
int idx = m_num++;
|
|
if (idx < NUM_EMBEDDED)
|
|
m_embedded[idx] = value;
|
|
else
|
|
{
|
|
/* Offset "idx" to be an index within m_extra. */
|
|
idx -= NUM_EMBEDDED;
|
|
if (NULL == m_extra)
|
|
{
|
|
linemap_assert (m_alloc == 0);
|
|
m_alloc = 16;
|
|
m_extra = XNEWVEC (T, m_alloc);
|
|
}
|
|
else if (idx >= m_alloc)
|
|
{
|
|
linemap_assert (m_alloc > 0);
|
|
m_alloc *= 2;
|
|
m_extra = XRESIZEVEC (T, m_extra, m_alloc);
|
|
}
|
|
linemap_assert (m_extra);
|
|
linemap_assert (idx < m_alloc);
|
|
m_extra[idx] = value;
|
|
}
|
|
}
|
|
|
|
/* Truncate to length LEN. No deallocation is performed. */
|
|
|
|
template <typename T, int NUM_EMBEDDED>
|
|
void
|
|
semi_embedded_vec<T, NUM_EMBEDDED>::truncate (int len)
|
|
{
|
|
linemap_assert (len <= m_num);
|
|
m_num = len;
|
|
}
|
|
|
|
class fixit_hint;
|
|
|
|
/* A "rich" source code location, for use when printing diagnostics.
|
|
A rich_location has one or more carets&ranges, where the carets
|
|
are optional. These are referred to as "ranges" from here.
|
|
Typically the zeroth range has a caret; other ranges sometimes
|
|
have carets.
|
|
|
|
The "primary" location of a rich_location is the caret of range 0,
|
|
used for determining the line/column when printing diagnostic
|
|
text, such as:
|
|
|
|
some-file.c:3:1: error: ...etc...
|
|
|
|
Additional ranges may be added to help the user identify other
|
|
pertinent clauses in a diagnostic.
|
|
|
|
rich_location instances are intended to be allocated on the stack
|
|
when generating diagnostics, and to be short-lived.
|
|
|
|
Examples of rich locations
|
|
--------------------------
|
|
|
|
Example A
|
|
*********
|
|
int i = "foo";
|
|
^
|
|
This "rich" location is simply a single range (range 0), with
|
|
caret = start = finish at the given point.
|
|
|
|
Example B
|
|
*********
|
|
a = (foo && bar)
|
|
~~~~~^~~~~~~
|
|
This rich location has a single range (range 0), with the caret
|
|
at the first "&", and the start/finish at the parentheses.
|
|
Compare with example C below.
|
|
|
|
Example C
|
|
*********
|
|
a = (foo && bar)
|
|
~~~ ^~ ~~~
|
|
This rich location has three ranges:
|
|
- Range 0 has its caret and start location at the first "&" and
|
|
end at the second "&.
|
|
- Range 1 has its start and finish at the "f" and "o" of "foo";
|
|
the caret is not flagged for display, but is perhaps at the "f"
|
|
of "foo".
|
|
- Similarly, range 2 has its start and finish at the "b" and "r" of
|
|
"bar"; the caret is not flagged for display, but is perhaps at the
|
|
"b" of "bar".
|
|
Compare with example B above.
|
|
|
|
Example D (Fortran frontend)
|
|
****************************
|
|
x = x + y
|
|
1 2
|
|
This rich location has range 0 at "1", and range 1 at "2".
|
|
Both are flagged for caret display. Both ranges have start/finish
|
|
equal to their caret point. The frontend overrides the diagnostic
|
|
context's default caret character for these ranges.
|
|
|
|
Example E
|
|
*********
|
|
printf ("arg0: %i arg1: %s arg2: %i",
|
|
^~
|
|
100, 101, 102);
|
|
~~~
|
|
This rich location has two ranges:
|
|
- range 0 is at the "%s" with start = caret = "%" and finish at
|
|
the "s".
|
|
- range 1 has start/finish covering the "101" and is not flagged for
|
|
caret printing; it is perhaps at the start of "101".
|
|
|
|
|
|
Fix-it hints
|
|
------------
|
|
|
|
Rich locations can also contain "fix-it hints", giving suggestions
|
|
for the user on how to edit their code to fix a problem. These
|
|
can be expressed as insertions, replacements, and removals of text.
|
|
The edits by default are relative to the zeroth range within the
|
|
rich_location, but optionally they can be expressed relative to
|
|
other locations (using various overloaded methods of the form
|
|
rich_location::add_fixit_*).
|
|
|
|
For example:
|
|
|
|
Example F: fix-it hint: insert_before
|
|
*************************************
|
|
ptr = arr[0];
|
|
^~~~~~
|
|
&
|
|
This rich location has a single range (range 0) covering "arr[0]",
|
|
with the caret at the start. The rich location has a single
|
|
insertion fix-it hint, inserted before range 0, added via
|
|
richloc.add_fixit_insert_before ("&");
|
|
|
|
Example G: multiple fix-it hints: insert_before and insert_after
|
|
****************************************************************
|
|
#define FN(ARG0, ARG1, ARG2) fn(ARG0, ARG1, ARG2)
|
|
^~~~ ^~~~ ^~~~
|
|
( ) ( ) ( )
|
|
This rich location has three ranges, covering "arg0", "arg1",
|
|
and "arg2", all with caret-printing enabled.
|
|
The rich location has 6 insertion fix-it hints: each arg
|
|
has a pair of insertion fix-it hints, suggesting wrapping
|
|
them with parentheses: one a '(' inserted before,
|
|
the other a ')' inserted after, added via
|
|
richloc.add_fixit_insert_before (LOC, "(");
|
|
and
|
|
richloc.add_fixit_insert_after (LOC, ")");
|
|
|
|
Example H: fix-it hint: removal
|
|
*******************************
|
|
struct s {int i};;
|
|
^
|
|
-
|
|
This rich location has a single range at the stray trailing
|
|
semicolon, along with a single removal fix-it hint, covering
|
|
the same range, added via:
|
|
richloc.add_fixit_remove ();
|
|
|
|
Example I: fix-it hint: replace
|
|
*******************************
|
|
c = s.colour;
|
|
^~~~~~
|
|
color
|
|
This rich location has a single range (range 0) covering "colour",
|
|
and a single "replace" fix-it hint, covering the same range,
|
|
added via
|
|
richloc.add_fixit_replace ("color");
|
|
|
|
Adding a fix-it hint can fail: for example, attempts to insert content
|
|
at the transition between two line maps may fail due to there being no
|
|
source_location (aka location_t) value to express the new location.
|
|
|
|
Attempts to add a fix-it hint within a macro expansion will fail.
|
|
|
|
There is only limited support for newline characters in fix-it hints:
|
|
only hints with newlines which insert an entire new line are permitted,
|
|
inserting at the start of a line, and finishing with a newline
|
|
(with no interior newline characters). Other attempts to add
|
|
fix-it hints containing newline characters will fail.
|
|
Similarly, attempts to delete or replace a range *affecting* multiple
|
|
lines will fail.
|
|
|
|
The rich_location API handles these failures gracefully, so that
|
|
diagnostics can attempt to add fix-it hints without each needing
|
|
extensive checking.
|
|
|
|
Fix-it hints within a rich_location are "atomic": if any hints can't
|
|
be applied, none of them will be (tracked by the m_seen_impossible_fixit
|
|
flag), and no fix-its hints will be displayed for that rich_location.
|
|
This implies that diagnostic messages need to be worded in such a way
|
|
that they make sense whether or not the fix-it hints are displayed,
|
|
or that richloc.seen_impossible_fixit_p () should be checked before
|
|
issuing the diagnostics. */
|
|
|
|
class rich_location
|
|
{
|
|
public:
|
|
/* Constructors. */
|
|
|
|
/* Constructing from a location. */
|
|
rich_location (line_maps *set, source_location loc);
|
|
|
|
/* Destructor. */
|
|
~rich_location ();
|
|
|
|
/* Accessors. */
|
|
source_location get_loc () const { return get_loc (0); }
|
|
source_location get_loc (unsigned int idx) const;
|
|
|
|
void
|
|
add_range (source_location loc, bool show_caret_p);
|
|
|
|
void
|
|
set_range (line_maps *set, unsigned int idx, source_location loc,
|
|
bool show_caret_p);
|
|
|
|
unsigned int get_num_locations () const { return m_ranges.count (); }
|
|
|
|
const location_range *get_range (unsigned int idx) const;
|
|
location_range *get_range (unsigned int idx);
|
|
|
|
expanded_location get_expanded_location (unsigned int idx);
|
|
|
|
void
|
|
override_column (int column);
|
|
|
|
/* Fix-it hints. */
|
|
|
|
/* Methods for adding insertion fix-it hints. */
|
|
|
|
/* Suggest inserting NEW_CONTENT immediately before the primary
|
|
range's start. */
|
|
void
|
|
add_fixit_insert_before (const char *new_content);
|
|
|
|
/* Suggest inserting NEW_CONTENT immediately before the start of WHERE. */
|
|
void
|
|
add_fixit_insert_before (source_location where,
|
|
const char *new_content);
|
|
|
|
/* Suggest inserting NEW_CONTENT immediately after the end of the primary
|
|
range. */
|
|
void
|
|
add_fixit_insert_after (const char *new_content);
|
|
|
|
/* Suggest inserting NEW_CONTENT immediately after the end of WHERE. */
|
|
void
|
|
add_fixit_insert_after (source_location where,
|
|
const char *new_content);
|
|
|
|
/* Methods for adding removal fix-it hints. */
|
|
|
|
/* Suggest removing the content covered by range 0. */
|
|
void
|
|
add_fixit_remove ();
|
|
|
|
/* Suggest removing the content covered between the start and finish
|
|
of WHERE. */
|
|
void
|
|
add_fixit_remove (source_location where);
|
|
|
|
/* Suggest removing the content covered by SRC_RANGE. */
|
|
void
|
|
add_fixit_remove (source_range src_range);
|
|
|
|
/* Methods for adding "replace" fix-it hints. */
|
|
|
|
/* Suggest replacing the content covered by range 0 with NEW_CONTENT. */
|
|
void
|
|
add_fixit_replace (const char *new_content);
|
|
|
|
/* Suggest replacing the content between the start and finish of
|
|
WHERE with NEW_CONTENT. */
|
|
void
|
|
add_fixit_replace (source_location where,
|
|
const char *new_content);
|
|
|
|
/* Suggest replacing the content covered by SRC_RANGE with
|
|
NEW_CONTENT. */
|
|
void
|
|
add_fixit_replace (source_range src_range,
|
|
const char *new_content);
|
|
|
|
unsigned int get_num_fixit_hints () const { return m_fixit_hints.count (); }
|
|
fixit_hint *get_fixit_hint (int idx) const { return m_fixit_hints[idx]; }
|
|
fixit_hint *get_last_fixit_hint () const;
|
|
bool seen_impossible_fixit_p () const { return m_seen_impossible_fixit; }
|
|
|
|
/* Set this if the fix-it hints are not suitable to be
|
|
automatically applied.
|
|
|
|
For example, if you are suggesting more than one
|
|
mutually exclusive solution to a problem, then
|
|
it doesn't make sense to apply all of the solutions;
|
|
manual intervention is required.
|
|
|
|
If set, then the fix-it hints in the rich_location will
|
|
be printed, but will not be added to generated patches,
|
|
or affect the modified version of the file. */
|
|
void fixits_cannot_be_auto_applied ()
|
|
{
|
|
m_fixits_cannot_be_auto_applied = true;
|
|
}
|
|
|
|
bool fixits_can_be_auto_applied_p () const
|
|
{
|
|
return !m_fixits_cannot_be_auto_applied;
|
|
}
|
|
|
|
private:
|
|
bool reject_impossible_fixit (source_location where);
|
|
void stop_supporting_fixits ();
|
|
void maybe_add_fixit (source_location start,
|
|
source_location next_loc,
|
|
const char *new_content);
|
|
|
|
public:
|
|
static const int STATICALLY_ALLOCATED_RANGES = 3;
|
|
|
|
protected:
|
|
line_maps *m_line_table;
|
|
semi_embedded_vec <location_range, STATICALLY_ALLOCATED_RANGES> m_ranges;
|
|
|
|
int m_column_override;
|
|
|
|
bool m_have_expanded_location;
|
|
expanded_location m_expanded_location;
|
|
|
|
static const int MAX_STATIC_FIXIT_HINTS = 2;
|
|
semi_embedded_vec <fixit_hint *, MAX_STATIC_FIXIT_HINTS> m_fixit_hints;
|
|
|
|
bool m_seen_impossible_fixit;
|
|
bool m_fixits_cannot_be_auto_applied;
|
|
};
|
|
|
|
/* A fix-it hint: a suggested insertion, replacement, or deletion of text.
|
|
We handle these three types of edit with one class, by representing
|
|
them as replacement of a half-open range:
|
|
[start, next_loc)
|
|
Insertions have start == next_loc: "replace" the empty string at the
|
|
start location with the new string.
|
|
Deletions are replacement with the empty string.
|
|
|
|
There is only limited support for newline characters in fix-it hints
|
|
as noted above in the comment for class rich_location.
|
|
A fixit_hint instance can have at most one newline character; if
|
|
present, the newline character must be the final character of
|
|
the content (preventing e.g. fix-its that split a pre-existing line). */
|
|
|
|
class fixit_hint
|
|
{
|
|
public:
|
|
fixit_hint (source_location start,
|
|
source_location next_loc,
|
|
const char *new_content);
|
|
~fixit_hint () { free (m_bytes); }
|
|
|
|
bool affects_line_p (const char *file, int line) const;
|
|
source_location get_start_loc () const { return m_start; }
|
|
source_location get_next_loc () const { return m_next_loc; }
|
|
bool maybe_append (source_location start,
|
|
source_location next_loc,
|
|
const char *new_content);
|
|
|
|
const char *get_string () const { return m_bytes; }
|
|
size_t get_length () const { return m_len; }
|
|
|
|
bool insertion_p () const { return m_start == m_next_loc; }
|
|
|
|
bool ends_with_newline_p () const;
|
|
|
|
private:
|
|
/* We don't use source_range here since, unlike most places,
|
|
this is a half-open/half-closed range:
|
|
[start, next_loc)
|
|
so that we can support insertion via start == next_loc. */
|
|
source_location m_start;
|
|
source_location m_next_loc;
|
|
char *m_bytes;
|
|
size_t m_len;
|
|
};
|
|
|
|
|
|
/* This is enum is used by the function linemap_resolve_location
|
|
below. The meaning of the values is explained in the comment of
|
|
that function. */
|
|
enum location_resolution_kind
|
|
{
|
|
LRK_MACRO_EXPANSION_POINT,
|
|
LRK_SPELLING_LOCATION,
|
|
LRK_MACRO_DEFINITION_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 first macro expansion point
|
|
that led to this macro expansion.
|
|
|
|
* If LRK is set to LRK_SPELLING_LOCATION
|
|
-------------------------------------
|
|
|
|
The virtual location is resolved 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_DEFINITION_LOCATION
|
|
--------------------------------------
|
|
|
|
The virtual location is resolved to the locus of the token in the
|
|
context of the macro definition.
|
|
|
|
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 LOC_MAP is not NULL, *LOC_MAP is set to the map encoding the
|
|
returned location. Note that if the returned 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 *,
|
|
source_location loc,
|
|
enum location_resolution_kind lrk,
|
|
const line_map_ordinary **loc_map);
|
|
|
|
/* Suppose that LOC is the virtual location of a token 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 point where M' was expanded. LOC_MAP is an output parameter.
|
|
When non-NULL, *LOC_MAP is set to the map of the returned
|
|
location. */
|
|
source_location linemap_unwind_toward_expansion (struct line_maps *,
|
|
source_location loc,
|
|
const struct line_map **loc_map);
|
|
|
|
/* If LOC is the virtual location of a token coming from the expansion
|
|
of a macro M and if its spelling location is reserved (e.g, a
|
|
location for a built-in token), then this function unwinds (using
|
|
linemap_unwind_toward_expansion) the location until a location that
|
|
is not reserved and is not in a system header is reached. In other
|
|
words, this unwinds the reserved location until a location that is
|
|
in real source code is reached.
|
|
|
|
Otherwise, if the spelling location for LOC is not reserved or if
|
|
LOC doesn't come from the expansion of a macro, the function
|
|
returns LOC as is and *MAP is not touched.
|
|
|
|
*MAP is set to the map of the returned location if the later is
|
|
different from LOC. */
|
|
source_location linemap_unwind_to_first_non_reserved_loc (struct line_maps *,
|
|
source_location loc,
|
|
const struct line_map **map);
|
|
|
|
/* 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 *,
|
|
const struct line_map *,
|
|
source_location loc);
|
|
|
|
/* Statistics about maps allocation and usage as returned by
|
|
linemap_get_statistics. */
|
|
struct linemap_stats
|
|
{
|
|
long num_ordinary_maps_allocated;
|
|
long num_ordinary_maps_used;
|
|
long ordinary_maps_allocated_size;
|
|
long ordinary_maps_used_size;
|
|
long num_expanded_macros;
|
|
long num_macro_tokens;
|
|
long num_macro_maps_used;
|
|
long macro_maps_allocated_size;
|
|
long macro_maps_used_size;
|
|
long macro_maps_locations_size;
|
|
long duplicated_macro_maps_locations_size;
|
|
long adhoc_table_size;
|
|
long adhoc_table_entries_used;
|
|
};
|
|
|
|
/* Return the highest location emitted for a given file for which
|
|
there is a line map in SET. FILE_NAME is the file name to
|
|
consider. If the function returns TRUE, *LOC is set to the highest
|
|
location emitted for that file. */
|
|
bool linemap_get_file_highest_location (struct line_maps * set,
|
|
const char *file_name,
|
|
source_location *loc);
|
|
|
|
/* Compute and return statistics about the memory consumption of some
|
|
parts of the line table SET. */
|
|
void linemap_get_statistics (struct line_maps *, struct linemap_stats *);
|
|
|
|
/* 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 *, source_location, FILE *);
|
|
|
|
/* 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 *, struct line_maps *, unsigned, bool);
|
|
|
|
/* 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 *, struct line_maps *, unsigned int, unsigned int);
|
|
|
|
/* An enum for distinguishing the various parts within a source_location. */
|
|
|
|
enum location_aspect
|
|
{
|
|
LOCATION_ASPECT_CARET,
|
|
LOCATION_ASPECT_START,
|
|
LOCATION_ASPECT_FINISH
|
|
};
|
|
|
|
/* The rich_location class requires a way to expand source_location instances.
|
|
We would directly use expand_location_to_spelling_point, which is
|
|
implemented in gcc/input.c, but we also need to use it for rich_location
|
|
within genmatch.c.
|
|
Hence we require client code of libcpp to implement the following
|
|
symbol. */
|
|
extern expanded_location
|
|
linemap_client_expand_location_to_spelling_point (source_location,
|
|
enum location_aspect);
|
|
|
|
#endif /* !LIBCPP_LINE_MAP_H */
|