a13be187cb
When we read preprocessed source, we deal with a couple of special location lines at the start of the file. These provide information about the original filename of the source and the current directory, so we can process the source in the same manner. When updating that code, I had a somewhat philosophical question: Should the line table contain evidence of the filename the user provided to the compiler? I figured to leave it there, as it did no harm. But this defect shows an issue. It's in the line table and our (non optimizing) line table serializer emits that filename. Which means if one re-preprocesses the original source to a differently-named intermediate file, the resultant CMI is different. Boo. That's a difference that doesn't matter, except the CRC matching then fails. We should elide the filename, so that one can preprocess to mktemp intermediate filenames for whatever reason. This patch takes the approach of expunging it from the line table -- so the line table will end up with exactly the same form. That seems a better bet than trying to fix up mismatching line tables in CMI emission. PR c++/99072 libcpp/ * init.c (read_original_filename): Expunge all evidence of the original filename. gcc/testsuite/ * g++.dg/modules/pr99072.H: New.
911 lines
30 KiB
C
911 lines
30 KiB
C
/* CPP Library.
|
|
Copyright (C) 1986-2021 Free Software Foundation, Inc.
|
|
Contributed by Per Bothner, 1994-95.
|
|
Based on CCCP program by Paul Rubin, June 1986
|
|
Adapted to ANSI C, Richard Stallman, Jan 1987
|
|
|
|
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/>. */
|
|
|
|
#include "config.h"
|
|
#include "system.h"
|
|
#include "cpplib.h"
|
|
#include "internal.h"
|
|
#include "mkdeps.h"
|
|
#include "localedir.h"
|
|
#include "filenames.h"
|
|
|
|
#ifndef ENABLE_CANONICAL_SYSTEM_HEADERS
|
|
#ifdef HAVE_DOS_BASED_FILE_SYSTEM
|
|
#define ENABLE_CANONICAL_SYSTEM_HEADERS 1
|
|
#else
|
|
#define ENABLE_CANONICAL_SYSTEM_HEADERS 0
|
|
#endif
|
|
#endif
|
|
|
|
static void init_library (void);
|
|
static void mark_named_operators (cpp_reader *, int);
|
|
static bool read_original_filename (cpp_reader *);
|
|
static void read_original_directory (cpp_reader *);
|
|
static void post_options (cpp_reader *);
|
|
|
|
/* If we have designated initializers (GCC >2.7) these tables can be
|
|
initialized, constant data. Otherwise, they have to be filled in at
|
|
runtime. */
|
|
#if HAVE_DESIGNATED_INITIALIZERS
|
|
|
|
#define init_trigraph_map() /* Nothing. */
|
|
#define TRIGRAPH_MAP \
|
|
__extension__ const uchar _cpp_trigraph_map[UCHAR_MAX + 1] = {
|
|
|
|
#define END };
|
|
#define s(p, v) [p] = v,
|
|
|
|
#else
|
|
|
|
#define TRIGRAPH_MAP uchar _cpp_trigraph_map[UCHAR_MAX + 1] = { 0 }; \
|
|
static void init_trigraph_map (void) { \
|
|
unsigned char *x = _cpp_trigraph_map;
|
|
|
|
#define END }
|
|
#define s(p, v) x[p] = v;
|
|
|
|
#endif
|
|
|
|
TRIGRAPH_MAP
|
|
s('=', '#') s(')', ']') s('!', '|')
|
|
s('(', '[') s('\'', '^') s('>', '}')
|
|
s('/', '\\') s('<', '{') s('-', '~')
|
|
END
|
|
|
|
#undef s
|
|
#undef END
|
|
#undef TRIGRAPH_MAP
|
|
|
|
/* A set of booleans indicating what CPP features each source language
|
|
requires. */
|
|
struct lang_flags
|
|
{
|
|
char c99;
|
|
char cplusplus;
|
|
char extended_numbers;
|
|
char extended_identifiers;
|
|
char c11_identifiers;
|
|
char std;
|
|
char digraphs;
|
|
char uliterals;
|
|
char rliterals;
|
|
char user_literals;
|
|
char binary_constants;
|
|
char digit_separators;
|
|
char trigraphs;
|
|
char utf8_char_literals;
|
|
char va_opt;
|
|
char scope;
|
|
char dfp_constants;
|
|
char size_t_literals;
|
|
};
|
|
|
|
static const struct lang_flags lang_defaults[] =
|
|
{ /* c99 c++ xnum xid c11 std digr ulit rlit udlit bincst digsep trig u8chlit vaopt scope dfp szlit */
|
|
/* GNUC89 */ { 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0 },
|
|
/* GNUC99 */ { 1, 0, 1, 1, 0, 0, 1, 1, 1, 0, 0, 0, 0, 0, 1, 1, 0, 0 },
|
|
/* GNUC11 */ { 1, 0, 1, 1, 1, 0, 1, 1, 1, 0, 0, 0, 0, 0, 1, 1, 0, 0 },
|
|
/* GNUC17 */ { 1, 0, 1, 1, 1, 0, 1, 1, 1, 0, 0, 0, 0, 0, 1, 1, 0, 0 },
|
|
/* GNUC2X */ { 1, 0, 1, 1, 1, 0, 1, 1, 1, 0, 1, 0, 0, 1, 1, 1, 1, 0 },
|
|
/* STDC89 */ { 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0 },
|
|
/* STDC94 */ { 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0 },
|
|
/* STDC99 */ { 1, 0, 1, 1, 0, 1, 1, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0 },
|
|
/* STDC11 */ { 1, 0, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0 },
|
|
/* STDC17 */ { 1, 0, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0 },
|
|
/* STDC2X */ { 1, 0, 1, 1, 1, 1, 1, 1, 0, 0, 1, 0, 1, 1, 0, 1, 1, 0 },
|
|
/* GNUCXX */ { 0, 1, 1, 1, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0 },
|
|
/* CXX98 */ { 0, 1, 0, 1, 0, 1, 1, 0, 0, 0, 0, 0, 1, 0, 0, 1, 0, 0 },
|
|
/* GNUCXX11 */ { 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 0, 0, 0, 0, 1, 1, 0, 0 },
|
|
/* CXX11 */ { 1, 1, 0, 1, 1, 1, 1, 1, 1, 1, 0, 0, 1, 0, 0, 1, 0, 0 },
|
|
/* GNUCXX14 */ { 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 0, 0, 1, 1, 0, 0 },
|
|
/* CXX14 */ { 1, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 1, 0, 0 },
|
|
/* GNUCXX17 */ { 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 0, 0 },
|
|
/* CXX17 */ { 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 0, 1, 0, 0 },
|
|
/* GNUCXX20 */ { 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 0, 0 },
|
|
/* CXX20 */ { 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 0, 0 },
|
|
/* GNUCXX23 */ { 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 0, 1 },
|
|
/* CXX23 */ { 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 0, 1 },
|
|
/* ASM */ { 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }
|
|
};
|
|
|
|
/* Sets internal flags correctly for a given language. */
|
|
void
|
|
cpp_set_lang (cpp_reader *pfile, enum c_lang lang)
|
|
{
|
|
const struct lang_flags *l = &lang_defaults[(int) lang];
|
|
|
|
CPP_OPTION (pfile, lang) = lang;
|
|
|
|
CPP_OPTION (pfile, c99) = l->c99;
|
|
CPP_OPTION (pfile, cplusplus) = l->cplusplus;
|
|
CPP_OPTION (pfile, extended_numbers) = l->extended_numbers;
|
|
CPP_OPTION (pfile, extended_identifiers) = l->extended_identifiers;
|
|
CPP_OPTION (pfile, c11_identifiers) = l->c11_identifiers;
|
|
CPP_OPTION (pfile, std) = l->std;
|
|
CPP_OPTION (pfile, digraphs) = l->digraphs;
|
|
CPP_OPTION (pfile, uliterals) = l->uliterals;
|
|
CPP_OPTION (pfile, rliterals) = l->rliterals;
|
|
CPP_OPTION (pfile, user_literals) = l->user_literals;
|
|
CPP_OPTION (pfile, binary_constants) = l->binary_constants;
|
|
CPP_OPTION (pfile, digit_separators) = l->digit_separators;
|
|
CPP_OPTION (pfile, trigraphs) = l->trigraphs;
|
|
CPP_OPTION (pfile, utf8_char_literals) = l->utf8_char_literals;
|
|
CPP_OPTION (pfile, va_opt) = l->va_opt;
|
|
CPP_OPTION (pfile, scope) = l->scope;
|
|
CPP_OPTION (pfile, dfp_constants) = l->dfp_constants;
|
|
CPP_OPTION (pfile, size_t_literals) = l->size_t_literals;
|
|
}
|
|
|
|
/* Initialize library global state. */
|
|
static void
|
|
init_library (void)
|
|
{
|
|
static int initialized = 0;
|
|
|
|
if (! initialized)
|
|
{
|
|
initialized = 1;
|
|
|
|
_cpp_init_lexer ();
|
|
|
|
/* Set up the trigraph map. This doesn't need to do anything if
|
|
we were compiled with a compiler that supports C99 designated
|
|
initializers. */
|
|
init_trigraph_map ();
|
|
|
|
#ifdef ENABLE_NLS
|
|
(void) bindtextdomain (PACKAGE, LOCALEDIR);
|
|
#endif
|
|
}
|
|
}
|
|
|
|
/* Initialize a cpp_reader structure. */
|
|
cpp_reader *
|
|
cpp_create_reader (enum c_lang lang, cpp_hash_table *table,
|
|
class line_maps *line_table)
|
|
{
|
|
cpp_reader *pfile;
|
|
|
|
/* Initialize this instance of the library if it hasn't been already. */
|
|
init_library ();
|
|
|
|
pfile = XCNEW (cpp_reader);
|
|
memset (&pfile->base_context, 0, sizeof (pfile->base_context));
|
|
|
|
cpp_set_lang (pfile, lang);
|
|
CPP_OPTION (pfile, warn_multichar) = 1;
|
|
CPP_OPTION (pfile, discard_comments) = 1;
|
|
CPP_OPTION (pfile, discard_comments_in_macro_exp) = 1;
|
|
CPP_OPTION (pfile, max_include_depth) = 200;
|
|
CPP_OPTION (pfile, operator_names) = 1;
|
|
CPP_OPTION (pfile, warn_trigraphs) = 2;
|
|
CPP_OPTION (pfile, warn_endif_labels) = 1;
|
|
CPP_OPTION (pfile, cpp_warn_c90_c99_compat) = -1;
|
|
CPP_OPTION (pfile, cpp_warn_c11_c2x_compat) = -1;
|
|
CPP_OPTION (pfile, cpp_warn_cxx11_compat) = 0;
|
|
CPP_OPTION (pfile, cpp_warn_deprecated) = 1;
|
|
CPP_OPTION (pfile, cpp_warn_long_long) = 0;
|
|
CPP_OPTION (pfile, dollars_in_ident) = 1;
|
|
CPP_OPTION (pfile, warn_dollars) = 1;
|
|
CPP_OPTION (pfile, warn_variadic_macros) = 1;
|
|
CPP_OPTION (pfile, warn_builtin_macro_redefined) = 1;
|
|
CPP_OPTION (pfile, cpp_warn_implicit_fallthrough) = 0;
|
|
/* By default, track locations of tokens resulting from macro
|
|
expansion. The '2' means, track the locations with the highest
|
|
accuracy. Read the comments for struct
|
|
cpp_options::track_macro_expansion to learn about the other
|
|
values. */
|
|
CPP_OPTION (pfile, track_macro_expansion) = 2;
|
|
CPP_OPTION (pfile, warn_normalize) = normalized_C;
|
|
CPP_OPTION (pfile, warn_literal_suffix) = 1;
|
|
CPP_OPTION (pfile, canonical_system_headers)
|
|
= ENABLE_CANONICAL_SYSTEM_HEADERS;
|
|
CPP_OPTION (pfile, ext_numeric_literals) = 1;
|
|
CPP_OPTION (pfile, warn_date_time) = 0;
|
|
|
|
/* Default CPP arithmetic to something sensible for the host for the
|
|
benefit of dumb users like fix-header. */
|
|
CPP_OPTION (pfile, precision) = CHAR_BIT * sizeof (long);
|
|
CPP_OPTION (pfile, char_precision) = CHAR_BIT;
|
|
CPP_OPTION (pfile, wchar_precision) = CHAR_BIT * sizeof (int);
|
|
CPP_OPTION (pfile, int_precision) = CHAR_BIT * sizeof (int);
|
|
CPP_OPTION (pfile, unsigned_char) = 0;
|
|
CPP_OPTION (pfile, unsigned_wchar) = 1;
|
|
CPP_OPTION (pfile, bytes_big_endian) = 1; /* does not matter */
|
|
|
|
/* Default to no charset conversion. */
|
|
CPP_OPTION (pfile, narrow_charset) = _cpp_default_encoding ();
|
|
CPP_OPTION (pfile, wide_charset) = 0;
|
|
|
|
/* Default the input character set to UTF-8. */
|
|
CPP_OPTION (pfile, input_charset) = _cpp_default_encoding ();
|
|
|
|
/* A fake empty "directory" used as the starting point for files
|
|
looked up without a search path. Name cannot be '/' because we
|
|
don't want to prepend anything at all to filenames using it. All
|
|
other entries are correct zero-initialized. */
|
|
pfile->no_search_path.name = (char *) "";
|
|
|
|
/* Initialize the line map. */
|
|
pfile->line_table = line_table;
|
|
|
|
/* Initialize lexer state. */
|
|
pfile->state.save_comments = ! CPP_OPTION (pfile, discard_comments);
|
|
|
|
/* Set up static tokens. */
|
|
pfile->avoid_paste.type = CPP_PADDING;
|
|
pfile->avoid_paste.val.source = NULL;
|
|
pfile->avoid_paste.src_loc = 0;
|
|
pfile->endarg.type = CPP_EOF;
|
|
pfile->endarg.flags = 0;
|
|
pfile->endarg.src_loc = 0;
|
|
|
|
/* Create a token buffer for the lexer. */
|
|
_cpp_init_tokenrun (&pfile->base_run, 250);
|
|
pfile->cur_run = &pfile->base_run;
|
|
pfile->cur_token = pfile->base_run.base;
|
|
|
|
/* Initialize the base context. */
|
|
pfile->context = &pfile->base_context;
|
|
pfile->base_context.c.macro = 0;
|
|
pfile->base_context.prev = pfile->base_context.next = 0;
|
|
|
|
/* Aligned and unaligned storage. */
|
|
pfile->a_buff = _cpp_get_buff (pfile, 0);
|
|
pfile->u_buff = _cpp_get_buff (pfile, 0);
|
|
|
|
/* Initialize table for push_macro/pop_macro. */
|
|
pfile->pushed_macros = 0;
|
|
|
|
/* Do not force token locations by default. */
|
|
pfile->forced_token_location = 0;
|
|
|
|
/* Note the timestamp is unset. */
|
|
pfile->time_stamp = time_t (-1);
|
|
pfile->time_stamp_kind = 0;
|
|
|
|
/* The expression parser stack. */
|
|
_cpp_expand_op_stack (pfile);
|
|
|
|
/* Initialize the buffer obstack. */
|
|
obstack_specify_allocation (&pfile->buffer_ob, 0, 0, xmalloc, free);
|
|
|
|
_cpp_init_files (pfile);
|
|
|
|
_cpp_init_hashtable (pfile, table);
|
|
|
|
return pfile;
|
|
}
|
|
|
|
/* Set the line_table entry in PFILE. This is called after reading a
|
|
PCH file, as the old line_table will be incorrect. */
|
|
void
|
|
cpp_set_line_map (cpp_reader *pfile, class line_maps *line_table)
|
|
{
|
|
pfile->line_table = line_table;
|
|
}
|
|
|
|
/* Free resources used by PFILE. Accessing PFILE after this function
|
|
returns leads to undefined behavior. Returns the error count. */
|
|
void
|
|
cpp_destroy (cpp_reader *pfile)
|
|
{
|
|
cpp_context *context, *contextn;
|
|
struct def_pragma_macro *pmacro;
|
|
tokenrun *run, *runn;
|
|
int i;
|
|
|
|
free (pfile->op_stack);
|
|
|
|
while (CPP_BUFFER (pfile) != NULL)
|
|
_cpp_pop_buffer (pfile);
|
|
|
|
free (pfile->out.base);
|
|
|
|
if (pfile->macro_buffer)
|
|
{
|
|
free (pfile->macro_buffer);
|
|
pfile->macro_buffer = NULL;
|
|
pfile->macro_buffer_len = 0;
|
|
}
|
|
|
|
if (pfile->deps)
|
|
deps_free (pfile->deps);
|
|
obstack_free (&pfile->buffer_ob, 0);
|
|
|
|
_cpp_destroy_hashtable (pfile);
|
|
_cpp_cleanup_files (pfile);
|
|
_cpp_destroy_iconv (pfile);
|
|
|
|
_cpp_free_buff (pfile->a_buff);
|
|
_cpp_free_buff (pfile->u_buff);
|
|
_cpp_free_buff (pfile->free_buffs);
|
|
|
|
for (run = &pfile->base_run; run; run = runn)
|
|
{
|
|
runn = run->next;
|
|
free (run->base);
|
|
if (run != &pfile->base_run)
|
|
free (run);
|
|
}
|
|
|
|
for (context = pfile->base_context.next; context; context = contextn)
|
|
{
|
|
contextn = context->next;
|
|
free (context);
|
|
}
|
|
|
|
if (pfile->comments.entries)
|
|
{
|
|
for (i = 0; i < pfile->comments.count; i++)
|
|
free (pfile->comments.entries[i].comment);
|
|
|
|
free (pfile->comments.entries);
|
|
}
|
|
if (pfile->pushed_macros)
|
|
{
|
|
do
|
|
{
|
|
pmacro = pfile->pushed_macros;
|
|
pfile->pushed_macros = pmacro->next;
|
|
free (pmacro->name);
|
|
free (pmacro);
|
|
}
|
|
while (pfile->pushed_macros);
|
|
}
|
|
|
|
free (pfile);
|
|
}
|
|
|
|
/* This structure defines one built-in identifier. A node will be
|
|
entered in the hash table under the name NAME, with value VALUE.
|
|
|
|
There are two tables of these. builtin_array holds all the
|
|
"builtin" macros: these are handled by builtin_macro() in
|
|
macro.c. Builtin is somewhat of a misnomer -- the property of
|
|
interest is that these macros require special code to compute their
|
|
expansions. The value is a "cpp_builtin_type" enumerator.
|
|
|
|
operator_array holds the C++ named operators. These are keywords
|
|
which act as aliases for punctuators. In C++, they cannot be
|
|
altered through #define, and #if recognizes them as operators. In
|
|
C, these are not entered into the hash table at all (but see
|
|
<iso646.h>). The value is a token-type enumerator. */
|
|
struct builtin_macro
|
|
{
|
|
const uchar *const name;
|
|
const unsigned short len;
|
|
const unsigned short value;
|
|
const bool always_warn_if_redefined;
|
|
};
|
|
|
|
#define B(n, t, f) { DSC(n), t, f }
|
|
static const struct builtin_macro builtin_array[] =
|
|
{
|
|
B("__TIMESTAMP__", BT_TIMESTAMP, false),
|
|
B("__TIME__", BT_TIME, false),
|
|
B("__DATE__", BT_DATE, false),
|
|
B("__FILE__", BT_FILE, false),
|
|
B("__BASE_FILE__", BT_BASE_FILE, false),
|
|
B("__LINE__", BT_SPECLINE, true),
|
|
B("__INCLUDE_LEVEL__", BT_INCLUDE_LEVEL, true),
|
|
B("__COUNTER__", BT_COUNTER, true),
|
|
/* Make sure to update the list of built-in
|
|
function-like macros in traditional.c:
|
|
fun_like_macro() when adding more following */
|
|
B("__has_attribute", BT_HAS_ATTRIBUTE, true),
|
|
B("__has_c_attribute", BT_HAS_STD_ATTRIBUTE, true),
|
|
B("__has_cpp_attribute", BT_HAS_ATTRIBUTE, true),
|
|
B("__has_builtin", BT_HAS_BUILTIN, true),
|
|
B("__has_include", BT_HAS_INCLUDE, true),
|
|
B("__has_include_next",BT_HAS_INCLUDE_NEXT, true),
|
|
/* Keep builtins not used for -traditional-cpp at the end, and
|
|
update init_builtins() if any more are added. */
|
|
B("_Pragma", BT_PRAGMA, true),
|
|
B("__STDC__", BT_STDC, true),
|
|
};
|
|
#undef B
|
|
|
|
struct builtin_operator
|
|
{
|
|
const uchar *const name;
|
|
const unsigned short len;
|
|
const unsigned short value;
|
|
};
|
|
|
|
#define B(n, t) { DSC(n), t }
|
|
static const struct builtin_operator operator_array[] =
|
|
{
|
|
B("and", CPP_AND_AND),
|
|
B("and_eq", CPP_AND_EQ),
|
|
B("bitand", CPP_AND),
|
|
B("bitor", CPP_OR),
|
|
B("compl", CPP_COMPL),
|
|
B("not", CPP_NOT),
|
|
B("not_eq", CPP_NOT_EQ),
|
|
B("or", CPP_OR_OR),
|
|
B("or_eq", CPP_OR_EQ),
|
|
B("xor", CPP_XOR),
|
|
B("xor_eq", CPP_XOR_EQ)
|
|
};
|
|
#undef B
|
|
|
|
/* Mark the C++ named operators in the hash table. */
|
|
static void
|
|
mark_named_operators (cpp_reader *pfile, int flags)
|
|
{
|
|
const struct builtin_operator *b;
|
|
|
|
for (b = operator_array;
|
|
b < (operator_array + ARRAY_SIZE (operator_array));
|
|
b++)
|
|
{
|
|
cpp_hashnode *hp = cpp_lookup (pfile, b->name, b->len);
|
|
hp->flags |= flags;
|
|
hp->is_directive = 0;
|
|
hp->directive_index = b->value;
|
|
}
|
|
}
|
|
|
|
/* Helper function of cpp_type2name. Return the string associated with
|
|
named operator TYPE. */
|
|
const char *
|
|
cpp_named_operator2name (enum cpp_ttype type)
|
|
{
|
|
const struct builtin_operator *b;
|
|
|
|
for (b = operator_array;
|
|
b < (operator_array + ARRAY_SIZE (operator_array));
|
|
b++)
|
|
{
|
|
if (type == b->value)
|
|
return (const char *) b->name;
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
void
|
|
cpp_init_special_builtins (cpp_reader *pfile)
|
|
{
|
|
const struct builtin_macro *b;
|
|
size_t n = ARRAY_SIZE (builtin_array);
|
|
|
|
if (CPP_OPTION (pfile, traditional))
|
|
n -= 2;
|
|
else if (! CPP_OPTION (pfile, stdc_0_in_system_headers)
|
|
|| CPP_OPTION (pfile, std))
|
|
n--;
|
|
|
|
for (b = builtin_array; b < builtin_array + n; b++)
|
|
{
|
|
if ((b->value == BT_HAS_ATTRIBUTE
|
|
|| b->value == BT_HAS_STD_ATTRIBUTE
|
|
|| b->value == BT_HAS_BUILTIN)
|
|
&& (CPP_OPTION (pfile, lang) == CLK_ASM
|
|
|| pfile->cb.has_attribute == NULL))
|
|
continue;
|
|
cpp_hashnode *hp = cpp_lookup (pfile, b->name, b->len);
|
|
hp->type = NT_BUILTIN_MACRO;
|
|
if (b->always_warn_if_redefined)
|
|
hp->flags |= NODE_WARN;
|
|
hp->value.builtin = (enum cpp_builtin_type) b->value;
|
|
}
|
|
}
|
|
|
|
/* Restore macro C to builtin macro definition. */
|
|
|
|
void
|
|
_cpp_restore_special_builtin (cpp_reader *pfile, struct def_pragma_macro *c)
|
|
{
|
|
size_t len = strlen (c->name);
|
|
|
|
for (const struct builtin_macro *b = builtin_array;
|
|
b < builtin_array + ARRAY_SIZE (builtin_array); b++)
|
|
if (b->len == len && memcmp (c->name, b->name, len + 1) == 0)
|
|
{
|
|
cpp_hashnode *hp = cpp_lookup (pfile, b->name, b->len);
|
|
hp->type = NT_BUILTIN_MACRO;
|
|
if (b->always_warn_if_redefined)
|
|
hp->flags |= NODE_WARN;
|
|
hp->value.builtin = (enum cpp_builtin_type) b->value;
|
|
}
|
|
}
|
|
|
|
/* Read the builtins table above and enter them, and language-specific
|
|
macros, into the hash table. HOSTED is true if this is a hosted
|
|
environment. */
|
|
void
|
|
cpp_init_builtins (cpp_reader *pfile, int hosted)
|
|
{
|
|
cpp_init_special_builtins (pfile);
|
|
|
|
if (!CPP_OPTION (pfile, traditional)
|
|
&& (! CPP_OPTION (pfile, stdc_0_in_system_headers)
|
|
|| CPP_OPTION (pfile, std)))
|
|
_cpp_define_builtin (pfile, "__STDC__ 1");
|
|
|
|
if (CPP_OPTION (pfile, cplusplus))
|
|
{
|
|
/* C++23 is not yet a standard. For now, use an invalid
|
|
* year/month, 202100L, which is larger than 202002L. */
|
|
if (CPP_OPTION (pfile, lang) == CLK_CXX23
|
|
|| CPP_OPTION (pfile, lang) == CLK_GNUCXX23)
|
|
_cpp_define_builtin (pfile, "__cplusplus 202100L");
|
|
else if (CPP_OPTION (pfile, lang) == CLK_CXX20
|
|
|| CPP_OPTION (pfile, lang) == CLK_GNUCXX20)
|
|
_cpp_define_builtin (pfile, "__cplusplus 202002L");
|
|
else if (CPP_OPTION (pfile, lang) == CLK_CXX17
|
|
|| CPP_OPTION (pfile, lang) == CLK_GNUCXX17)
|
|
_cpp_define_builtin (pfile, "__cplusplus 201703L");
|
|
else if (CPP_OPTION (pfile, lang) == CLK_CXX14
|
|
|| CPP_OPTION (pfile, lang) == CLK_GNUCXX14)
|
|
_cpp_define_builtin (pfile, "__cplusplus 201402L");
|
|
else if (CPP_OPTION (pfile, lang) == CLK_CXX11
|
|
|| CPP_OPTION (pfile, lang) == CLK_GNUCXX11)
|
|
_cpp_define_builtin (pfile, "__cplusplus 201103L");
|
|
else
|
|
_cpp_define_builtin (pfile, "__cplusplus 199711L");
|
|
}
|
|
else if (CPP_OPTION (pfile, lang) == CLK_ASM)
|
|
_cpp_define_builtin (pfile, "__ASSEMBLER__ 1");
|
|
else if (CPP_OPTION (pfile, lang) == CLK_STDC94)
|
|
_cpp_define_builtin (pfile, "__STDC_VERSION__ 199409L");
|
|
else if (CPP_OPTION (pfile, lang) == CLK_STDC2X
|
|
|| CPP_OPTION (pfile, lang) == CLK_GNUC2X)
|
|
_cpp_define_builtin (pfile, "__STDC_VERSION__ 202000L");
|
|
else if (CPP_OPTION (pfile, lang) == CLK_STDC17
|
|
|| CPP_OPTION (pfile, lang) == CLK_GNUC17)
|
|
_cpp_define_builtin (pfile, "__STDC_VERSION__ 201710L");
|
|
else if (CPP_OPTION (pfile, lang) == CLK_STDC11
|
|
|| CPP_OPTION (pfile, lang) == CLK_GNUC11)
|
|
_cpp_define_builtin (pfile, "__STDC_VERSION__ 201112L");
|
|
else if (CPP_OPTION (pfile, c99))
|
|
_cpp_define_builtin (pfile, "__STDC_VERSION__ 199901L");
|
|
|
|
if (CPP_OPTION (pfile, uliterals)
|
|
&& !(CPP_OPTION (pfile, cplusplus)
|
|
&& (CPP_OPTION (pfile, lang) == CLK_GNUCXX
|
|
|| CPP_OPTION (pfile, lang) == CLK_CXX98)))
|
|
{
|
|
_cpp_define_builtin (pfile, "__STDC_UTF_16__ 1");
|
|
_cpp_define_builtin (pfile, "__STDC_UTF_32__ 1");
|
|
}
|
|
|
|
if (hosted)
|
|
_cpp_define_builtin (pfile, "__STDC_HOSTED__ 1");
|
|
else
|
|
_cpp_define_builtin (pfile, "__STDC_HOSTED__ 0");
|
|
|
|
if (CPP_OPTION (pfile, objc))
|
|
_cpp_define_builtin (pfile, "__OBJC__ 1");
|
|
}
|
|
|
|
/* Sanity-checks are dependent on command-line options, so it is
|
|
called as a subroutine of cpp_read_main_file. */
|
|
#if CHECKING_P
|
|
static void sanity_checks (cpp_reader *);
|
|
static void sanity_checks (cpp_reader *pfile)
|
|
{
|
|
cppchar_t test = 0;
|
|
size_t max_precision = 2 * CHAR_BIT * sizeof (cpp_num_part);
|
|
|
|
/* Sanity checks for assumptions about CPP arithmetic and target
|
|
type precisions made by cpplib. */
|
|
test--;
|
|
if (test < 1)
|
|
cpp_error (pfile, CPP_DL_ICE, "cppchar_t must be an unsigned type");
|
|
|
|
if (CPP_OPTION (pfile, precision) > max_precision)
|
|
cpp_error (pfile, CPP_DL_ICE,
|
|
"preprocessor arithmetic has maximum precision of %lu bits;"
|
|
" target requires %lu bits",
|
|
(unsigned long) max_precision,
|
|
(unsigned long) CPP_OPTION (pfile, precision));
|
|
|
|
if (CPP_OPTION (pfile, precision) < CPP_OPTION (pfile, int_precision))
|
|
cpp_error (pfile, CPP_DL_ICE,
|
|
"CPP arithmetic must be at least as precise as a target int");
|
|
|
|
if (CPP_OPTION (pfile, char_precision) < 8)
|
|
cpp_error (pfile, CPP_DL_ICE, "target char is less than 8 bits wide");
|
|
|
|
if (CPP_OPTION (pfile, wchar_precision) < CPP_OPTION (pfile, char_precision))
|
|
cpp_error (pfile, CPP_DL_ICE,
|
|
"target wchar_t is narrower than target char");
|
|
|
|
if (CPP_OPTION (pfile, int_precision) < CPP_OPTION (pfile, char_precision))
|
|
cpp_error (pfile, CPP_DL_ICE,
|
|
"target int is narrower than target char");
|
|
|
|
/* This is assumed in eval_token() and could be fixed if necessary. */
|
|
if (sizeof (cppchar_t) > sizeof (cpp_num_part))
|
|
cpp_error (pfile, CPP_DL_ICE,
|
|
"CPP half-integer narrower than CPP character");
|
|
|
|
if (CPP_OPTION (pfile, wchar_precision) > BITS_PER_CPPCHAR_T)
|
|
cpp_error (pfile, CPP_DL_ICE,
|
|
"CPP on this host cannot handle wide character constants over"
|
|
" %lu bits, but the target requires %lu bits",
|
|
(unsigned long) BITS_PER_CPPCHAR_T,
|
|
(unsigned long) CPP_OPTION (pfile, wchar_precision));
|
|
}
|
|
#else
|
|
# define sanity_checks(PFILE)
|
|
#endif
|
|
|
|
/* This is called after options have been parsed, and partially
|
|
processed. */
|
|
void
|
|
cpp_post_options (cpp_reader *pfile)
|
|
{
|
|
int flags;
|
|
|
|
sanity_checks (pfile);
|
|
|
|
post_options (pfile);
|
|
|
|
/* Mark named operators before handling command line macros. */
|
|
flags = 0;
|
|
if (CPP_OPTION (pfile, cplusplus) && CPP_OPTION (pfile, operator_names))
|
|
flags |= NODE_OPERATOR;
|
|
if (CPP_OPTION (pfile, warn_cxx_operator_names))
|
|
flags |= NODE_DIAGNOSTIC | NODE_WARN_OPERATOR;
|
|
if (flags != 0)
|
|
mark_named_operators (pfile, flags);
|
|
}
|
|
|
|
/* Setup for processing input from the file named FNAME, or stdin if
|
|
it is the empty string. Return the original filename on success
|
|
(e.g. foo.i->foo.c), or NULL on failure. INJECTING is true if
|
|
there may be injected headers before line 1 of the main file. */
|
|
const char *
|
|
cpp_read_main_file (cpp_reader *pfile, const char *fname, bool injecting)
|
|
{
|
|
if (mkdeps *deps = cpp_get_deps (pfile))
|
|
/* Set the default target (if there is none already). */
|
|
deps_add_default_target (deps, fname);
|
|
|
|
pfile->main_file
|
|
= _cpp_find_file (pfile, fname,
|
|
CPP_OPTION (pfile, preprocessed) ? &pfile->no_search_path
|
|
: CPP_OPTION (pfile, main_search) == CMS_user
|
|
? pfile->quote_include
|
|
: CPP_OPTION (pfile, main_search) == CMS_system
|
|
? pfile->bracket_include : &pfile->no_search_path,
|
|
/*angle=*/0, _cpp_FFK_NORMAL, 0);
|
|
|
|
if (_cpp_find_failed (pfile->main_file))
|
|
return NULL;
|
|
|
|
_cpp_stack_file (pfile, pfile->main_file,
|
|
injecting || CPP_OPTION (pfile, preprocessed)
|
|
? IT_PRE_MAIN : IT_MAIN, 0);
|
|
|
|
/* For foo.i, read the original filename foo.c now, for the benefit
|
|
of the front ends. */
|
|
if (CPP_OPTION (pfile, preprocessed))
|
|
if (!read_original_filename (pfile))
|
|
{
|
|
/* We're on line 1 after all. */
|
|
auto *last = linemap_check_ordinary
|
|
(LINEMAPS_LAST_MAP (pfile->line_table, false));
|
|
last->to_line = 1;
|
|
/* Inform of as-if a file change. */
|
|
_cpp_do_file_change (pfile, LC_RENAME_VERBATIM, LINEMAP_FILE (last),
|
|
LINEMAP_LINE (last), LINEMAP_SYSP (last));
|
|
}
|
|
|
|
auto *map = LINEMAPS_LAST_ORDINARY_MAP (pfile->line_table);
|
|
pfile->main_loc = MAP_START_LOCATION (map);
|
|
|
|
return ORDINARY_MAP_FILE_NAME (map);
|
|
}
|
|
|
|
location_t
|
|
cpp_main_loc (const cpp_reader *pfile)
|
|
{
|
|
return pfile->main_loc;
|
|
}
|
|
|
|
/* For preprocessed files, if the very first characters are
|
|
'#<SPACE>[01]<SPACE>', then handle a line directive so we know the
|
|
original file name. This will generate file_change callbacks,
|
|
which the front ends must handle appropriately given their state of
|
|
initialization. We peek directly into the character buffer, so
|
|
that we're not confused by otherwise-skipped white space &
|
|
comments. We can be very picky, because this should have been
|
|
machine-generated text (by us, no less). This way we do not
|
|
interfere with the module directive state machine. */
|
|
|
|
static bool
|
|
read_original_filename (cpp_reader *pfile)
|
|
{
|
|
auto *buf = pfile->buffer->next_line;
|
|
|
|
if (pfile->buffer->rlimit - buf > 4
|
|
&& buf[0] == '#'
|
|
&& buf[1] == ' '
|
|
// Also permit '1', as that's what used to be here
|
|
&& (buf[2] == '0' || buf[2] == '1')
|
|
&& buf[3] == ' ')
|
|
{
|
|
const cpp_token *token = _cpp_lex_direct (pfile);
|
|
gcc_checking_assert (token->type == CPP_HASH);
|
|
if (_cpp_handle_directive (pfile, token->flags & PREV_WHITE))
|
|
{
|
|
read_original_directory (pfile);
|
|
|
|
auto *penult = &linemap_check_ordinary
|
|
(LINEMAPS_LAST_MAP (pfile->line_table, false))[-1];
|
|
if (penult[1].reason == LC_RENAME_VERBATIM)
|
|
{
|
|
/* Expunge any evidence of the original linemap. */
|
|
pfile->line_table->highest_location
|
|
= pfile->line_table->highest_line
|
|
= penult[0].start_location;
|
|
|
|
penult[1].start_location = penult[0].start_location;
|
|
penult[1].reason = penult[0].reason;
|
|
penult[0] = penult[1];
|
|
pfile->line_table->info_ordinary.used--;
|
|
pfile->line_table->info_ordinary.cache = 0;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
/* For preprocessed files, if the tokens following the first filename
|
|
line is of the form # <line> "/path/name//", handle the
|
|
directive so we know the original current directory.
|
|
|
|
As with the first line peeking, we can do this without lexing by
|
|
being picky. */
|
|
static void
|
|
read_original_directory (cpp_reader *pfile)
|
|
{
|
|
auto *buf = pfile->buffer->next_line;
|
|
|
|
if (pfile->buffer->rlimit - buf > 4
|
|
&& buf[0] == '#'
|
|
&& buf[1] == ' '
|
|
// Also permit '1', as that's what used to be here
|
|
&& (buf[2] == '0' || buf[2] == '1')
|
|
&& buf[3] == ' ')
|
|
{
|
|
const cpp_token *hash = _cpp_lex_direct (pfile);
|
|
gcc_checking_assert (hash->type == CPP_HASH);
|
|
pfile->state.in_directive = 1;
|
|
const cpp_token *number = _cpp_lex_direct (pfile);
|
|
gcc_checking_assert (number->type == CPP_NUMBER);
|
|
const cpp_token *string = _cpp_lex_direct (pfile);
|
|
pfile->state.in_directive = 0;
|
|
|
|
const unsigned char *text = nullptr;
|
|
size_t len = 0;
|
|
if (string->type == CPP_STRING)
|
|
{
|
|
/* The string value includes the quotes. */
|
|
text = string->val.str.text;
|
|
len = string->val.str.len;
|
|
}
|
|
if (len < 5
|
|
|| !IS_DIR_SEPARATOR (text[len - 2])
|
|
|| !IS_DIR_SEPARATOR (text[len - 3]))
|
|
{
|
|
/* That didn't work out, back out. */
|
|
_cpp_backup_tokens (pfile, 3);
|
|
return;
|
|
}
|
|
|
|
if (pfile->cb.dir_change)
|
|
{
|
|
/* Smash the string directly, it's dead at this point */
|
|
char *smashy = (char *)text;
|
|
smashy[len - 3] = 0;
|
|
|
|
pfile->cb.dir_change (pfile, smashy + 1);
|
|
}
|
|
|
|
/* We should be at EOL. */
|
|
}
|
|
}
|
|
|
|
/* This is called at the end of preprocessing. It pops the last
|
|
buffer and writes dependency output.
|
|
|
|
Maybe it should also reset state, such that you could call
|
|
cpp_start_read with a new filename to restart processing. */
|
|
void
|
|
cpp_finish (cpp_reader *pfile, FILE *deps_stream)
|
|
{
|
|
/* Warn about unused macros before popping the final buffer. */
|
|
if (CPP_OPTION (pfile, warn_unused_macros))
|
|
cpp_forall_identifiers (pfile, _cpp_warn_if_unused_macro, NULL);
|
|
|
|
/* lex.c leaves the final buffer on the stack. This it so that
|
|
it returns an unending stream of CPP_EOFs to the client. If we
|
|
popped the buffer, we'd dereference a NULL buffer pointer and
|
|
segfault. It's nice to allow the client to do worry-free excess
|
|
cpp_get_token calls. */
|
|
while (pfile->buffer)
|
|
_cpp_pop_buffer (pfile);
|
|
|
|
if (deps_stream)
|
|
deps_write (pfile, deps_stream, 72);
|
|
|
|
/* Report on headers that could use multiple include guards. */
|
|
if (CPP_OPTION (pfile, print_include_names))
|
|
_cpp_report_missing_guards (pfile);
|
|
}
|
|
|
|
static void
|
|
post_options (cpp_reader *pfile)
|
|
{
|
|
/* -Wtraditional is not useful in C++ mode. */
|
|
if (CPP_OPTION (pfile, cplusplus))
|
|
CPP_OPTION (pfile, cpp_warn_traditional) = 0;
|
|
|
|
/* Permanently disable macro expansion if we are rescanning
|
|
preprocessed text. Read preprocesed source in ISO mode. */
|
|
if (CPP_OPTION (pfile, preprocessed))
|
|
{
|
|
if (!CPP_OPTION (pfile, directives_only))
|
|
pfile->state.prevent_expansion = 1;
|
|
CPP_OPTION (pfile, traditional) = 0;
|
|
}
|
|
|
|
if (CPP_OPTION (pfile, warn_trigraphs) == 2)
|
|
CPP_OPTION (pfile, warn_trigraphs) = !CPP_OPTION (pfile, trigraphs);
|
|
|
|
if (CPP_OPTION (pfile, traditional))
|
|
{
|
|
CPP_OPTION (pfile, trigraphs) = 0;
|
|
CPP_OPTION (pfile, warn_trigraphs) = 0;
|
|
}
|
|
|
|
if (CPP_OPTION (pfile, module_directives))
|
|
{
|
|
/* These unspellable tokens have a leading space. */
|
|
const char *const inits[spec_nodes::M_HWM]
|
|
= {"export ", "module ", "import ", "__import"};
|
|
|
|
for (int ix = 0; ix != spec_nodes::M_HWM; ix++)
|
|
{
|
|
cpp_hashnode *node = cpp_lookup (pfile, UC (inits[ix]),
|
|
strlen (inits[ix]));
|
|
|
|
/* Token we pass to the compiler. */
|
|
pfile->spec_nodes.n_modules[ix][1] = node;
|
|
|
|
if (ix != spec_nodes::M__IMPORT)
|
|
/* Token we recognize when lexing, drop the trailing ' '. */
|
|
node = cpp_lookup (pfile, NODE_NAME (node), NODE_LEN (node) - 1);
|
|
|
|
node->flags |= NODE_MODULE;
|
|
pfile->spec_nodes.n_modules[ix][0] = node;
|
|
}
|
|
}
|
|
}
|