/* Part of CPP library. (include file handling)
Copyright (C) 1986, 1987, 1989, 1992, 1993, 1994, 1995, 1998,
- 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
+ 1999, 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
Written by Per Bothner, 1994.
Based on CCCP program by Paul Rubin, June 1986
Adapted to ANSI C, Richard Stallman, Jan 1987
#include "config.h"
#include "system.h"
+#include <dirent.h>
+#include "coretypes.h"
+#include "tm.h"
#include "cpplib.h"
#include "cpphash.h"
#include "intl.h"
#include "mkdeps.h"
#include "splay-tree.h"
+#ifdef ENABLE_VALGRIND_CHECKING
+# ifdef HAVE_MEMCHECK_H
+# include <memcheck.h>
+# else
+# include <valgrind.h>
+# endif
+#else
+/* Avoid #ifdef:s when we can help it. */
+#define VALGRIND_DISCARD(x)
+#endif
#ifdef HAVE_MMAP_FILE
# include <sys/mman.h>
#undef strcmp
/* This structure is used for the table of all includes. */
-struct include_file
-{
+struct include_file {
const char *name; /* actual path name of file */
+ const char *header_name; /* the original header found */
const cpp_hashnode *cmacro; /* macro, if any, preventing reinclusion. */
- const struct search_path *foundhere;
+ const struct cpp_path *foundhere;
/* location in search path where file was
found, for #include_next and sysp. */
const unsigned char *buffer; /* pointer to cached file contents */
unsigned short include_count; /* number of times file has been read */
unsigned short refcnt; /* number of stacked buffers using this file */
unsigned char mapped; /* file buffer is mmapped */
+ unsigned char pch; /* 0: file not known to be a PCH.
+ 1: file is a PCH
+ (on return from find_include_file).
+ 2: file is not and never will be a valid
+ precompiled header.
+ 3: file is always a valid precompiled
+ header. */
};
/* Variable length record files on VMS will have a stat size that includes
included again. If it's NEVER_REREAD, the file is never to be
included again. Otherwise it is a macro hashnode, and the file is
to be included again if the macro is defined. */
-#define NEVER_REREAD ((const cpp_hashnode *)-1)
+#define NEVER_REREAD ((const cpp_hashnode *) -1)
#define DO_NOT_REREAD(inc) \
((inc)->cmacro && ((inc)->cmacro == NEVER_REREAD \
|| (inc)->cmacro->type == NT_MACRO))
#define NO_INCLUDE_PATH ((struct include_file *) -1)
+#define INCLUDE_PCH_P(F) (((F)->pch & 1) != 0)
static struct file_name_map *read_name_map
PARAMS ((cpp_reader *, const char *));
static char *read_filename_string PARAMS ((int, FILE *));
static char *remap_filename PARAMS ((cpp_reader *, char *,
- struct search_path *));
-static struct search_path *search_from PARAMS ((cpp_reader *,
+ struct cpp_path *));
+static struct cpp_path *search_from PARAMS ((cpp_reader *,
enum include_type));
static struct include_file *
find_include_file PARAMS ((cpp_reader *, const cpp_token *,
enum include_type));
static struct include_file *open_file PARAMS ((cpp_reader *, const char *));
+static struct include_file *validate_pch PARAMS ((cpp_reader *,
+ const char *,
+ const char *));
+static struct include_file *open_file_pch PARAMS ((cpp_reader *,
+ const char *));
static int read_include_file PARAMS ((cpp_reader *, struct include_file *));
static bool stack_include_file PARAMS ((cpp_reader *, struct include_file *));
static void purge_cache PARAMS ((struct include_file *));
static splay_tree_node find_or_create_entry PARAMS ((cpp_reader *,
const char *));
static void handle_missing_header PARAMS ((cpp_reader *, const char *, int));
-static int remove_component_p PARAMS ((const char *));
+static int remove_component_p PARAMS ((const char *));
/* Set up the splay tree we use to store information about all the
file names seen in this compilation. We also have entries for each
don't try to open it again in future.
The key of each node is the file name, after processing by
- _cpp_simplify_pathname. The path name may or may not be absolute.
+ cpp_simplify_path. The path name may or may not be absolute.
The path string has been malloced, as is automatically freed by
registering free () as the splay tree key deletion function.
destroy_node (v)
splay_tree_value v;
{
- struct include_file *f = (struct include_file *)v;
+ struct include_file *f = (struct include_file *) v;
if (f)
{
}
/* Lookup a filename, which is simplified after making a copy, and
- create an entry if none exists. errno is nonzero iff a (reported)
- stat() error occurred during simplification. */
+ create an entry if none exists. */
static splay_tree_node
find_or_create_entry (pfile, fname)
cpp_reader *pfile;
struct include_file *file;
char *name = xstrdup (fname);
- _cpp_simplify_pathname (name);
+ cpp_simplify_path (name);
node = splay_tree_lookup (pfile->all_include_files, (splay_tree_key) name);
if (node)
free (name);
{
file = xcnew (struct include_file);
file->name = name;
+ file->header_name = name;
file->err_no = errno;
node = splay_tree_insert (pfile->all_include_files,
(splay_tree_key) file->name,
return 0;
}
+static struct include_file *
+validate_pch (pfile, filename, pchname)
+ cpp_reader *pfile;
+ const char *filename;
+ const char *pchname;
+{
+ struct include_file * file;
+
+ file = open_file (pfile, pchname);
+ if (file == NULL)
+ return NULL;
+ if ((file->pch & 2) == 0)
+ file->pch = pfile->cb.valid_pch (pfile, pchname, file->fd);
+ if (INCLUDE_PCH_P (file))
+ {
+ char *f = xstrdup (filename);
+ cpp_simplify_path (f);
+ file->header_name = f;
+ return file;
+ }
+ close (file->fd);
+ file->fd = -1;
+ return NULL;
+}
+
+
+/* Like open_file, but also look for a precompiled header if (a) one exists
+ and (b) it is valid. */
+static struct include_file *
+open_file_pch (pfile, filename)
+ cpp_reader *pfile;
+ const char *filename;
+{
+ if (filename[0] != '\0'
+ && pfile->cb.valid_pch != NULL)
+ {
+ size_t namelen = strlen (filename);
+ char *pchname = alloca (namelen + 5);
+ struct include_file * file;
+ splay_tree_node nd;
+
+ memcpy (pchname, filename, namelen);
+ memcpy (pchname + namelen, ".gch", 5);
+
+ nd = find_or_create_entry (pfile, pchname);
+ file = (struct include_file *) nd->value;
+
+ if (file != NULL)
+ {
+ if (stat (file->name, &file->st) == 0 && S_ISDIR (file->st.st_mode))
+ {
+ DIR * thedir;
+ struct dirent *d;
+ size_t subname_len = namelen + 64;
+ char *subname = xmalloc (subname_len);
+
+ thedir = opendir (pchname);
+ if (thedir == NULL)
+ return NULL;
+ memcpy (subname, pchname, namelen + 4);
+ subname[namelen+4] = '/';
+ while ((d = readdir (thedir)) != NULL)
+ {
+ if (strlen (d->d_name) + namelen + 7 > subname_len)
+ {
+ subname_len = strlen (d->d_name) + namelen + 64;
+ subname = xrealloc (subname, subname_len);
+ }
+ strcpy (subname + namelen + 5, d->d_name);
+ file = validate_pch (pfile, filename, subname);
+ if (file)
+ break;
+ }
+ closedir (thedir);
+ free (subname);
+ }
+ else
+ file = validate_pch (pfile, filename, pchname);
+ if (file)
+ return file;
+ }
+ }
+ return open_file (pfile, filename);
+}
+
/* Place the file referenced by INC into a new buffer on the buffer
stack, unless there are errors, or the file is not re-included
because of e.g. multiple-include guards. Returns true if a buffer
sysp = MAX ((pfile->map ? pfile->map->sysp : 0),
(inc->foundhere ? inc->foundhere->sysp : 0));
- /* For -M, add the file to the dependencies on its first inclusion. */
- if (CPP_OPTION (pfile, print_deps) > sysp && !inc->include_count)
- deps_add_dep (pfile->deps, inc->name);
+ /* Add the file to the dependencies on its first inclusion. */
+ if (CPP_OPTION (pfile, deps.style) > !!sysp && !inc->include_count)
+ {
+ if (pfile->buffer || CPP_OPTION (pfile, deps.ignore_main_file) == 0)
+ deps_add_dep (pfile->deps, inc->name);
+ }
+
+ /* PCH files get dealt with immediately. */
+ if (INCLUDE_PCH_P (inc))
+ {
+ pfile->cb.read_pch (pfile, inc->name, inc->fd, inc->header_name);
+ close (inc->fd);
+ inc->fd = -1;
+ return false;
+ }
/* Not in cache? */
if (! inc->buffer)
fp->inc = inc;
fp->inc->refcnt++;
- /* Initialise controlling macro state. */
+ /* Initialize controlling macro state. */
pfile->mi_valid = true;
pfile->mi_cmacro = 0;
if (SHOULD_MMAP (size, pagesize))
{
buf = (uchar *) mmap (0, size, PROT_READ, MAP_PRIVATE, inc->fd, 0);
- if (buf == (uchar *)-1)
+ if (buf == (uchar *) -1)
goto perror_fail;
+
+ /* We must tell Valgrind that the byte at buf[size] is actually
+ readable. Discard the handle to avoid handle leak. */
+ VALGRIND_DISCARD (VALGRIND_MAKE_READABLE (buf + size, 1));
+
inc->mapped = 1;
}
else
{
#if MMAP_THRESHOLD
if (inc->mapped)
- munmap ((PTR) inc->buffer, inc->st.st_size);
+ {
+ /* Undo the previous annotation for the
+ known-zero-byte-after-mmap. Discard the handle to avoid
+ handle leak. */
+ VALGRIND_DISCARD (VALGRIND_MAKE_NOACCESS (inc->buffer
+ + inc->st.st_size, 1));
+ munmap ((PTR) inc->buffer, inc->st.st_size);
+ }
else
#endif
free ((PTR) inc->buffer);
cpp_reader *pfile;
const char *fname;
{
- struct search_path *path;
+ struct cpp_path *path;
char *name, *n;
splay_tree_node nd;
/* Search directory path for the file. */
name = (char *) alloca (strlen (fname) + pfile->max_include_len + 2);
- for (path = CPP_OPTION (pfile, quote_include); path; path = path->next)
+ for (path = pfile->quote_include; path; path = path->next)
{
memcpy (name, path->name, path->len);
name[path->len] = '/';
enum include_type type;
{
const char *fname = (const char *) header->val.str.text;
- struct search_path *path;
+ struct cpp_path *path;
struct include_file *file;
char *name, *n;
if (IS_ABSOLUTE_PATHNAME (fname))
- return open_file (pfile, fname);
+ return open_file_pch (pfile, fname);
/* For #include_next, skip in the search path past the dir in which
the current file was found, but if it was found via an absolute
if (type == IT_INCLUDE_NEXT && pfile->buffer->inc->foundhere)
path = pfile->buffer->inc->foundhere->next;
else if (header->type == CPP_HEADER_NAME)
- path = CPP_OPTION (pfile, bracket_include);
+ path = pfile->bracket_include;
else
path = search_from (pfile, type);
else
n = name;
- file = open_file (pfile, n);
+ file = open_file_pch (pfile, n);
if (file)
{
file->foundhere = path;
SOURCE_LINE (pfile->map, pfile->line), flags);
}
+/* Allow the client to change the current file. Used by the front end
+ to achieve pseudo-file names like <built-in>.
+ If REASON is LC_LEAVE, then NEW_NAME must be NULL. */
+void
+cpp_change_file (pfile, reason, new_name)
+ cpp_reader *pfile;
+ enum lc_reason reason;
+ const char *new_name;
+{
+ _cpp_do_file_change (pfile, reason, new_name, 1, 0);
+}
+
/* Report on all files that might benefit from a multiple include guard.
Triggered by -H. */
void
void *b;
{
struct include_file *f = (struct include_file *) n->value;
- int *bannerp = (int *)b;
+ int *bannerp = (int *) b;
if (f && f->cmacro == 0 && f->include_count == 1)
{
}
/* Create a dependency for file FNAME, or issue an error message as
- appropriate. ANGLE_BRACKETS is non-zero if the file was bracketed
+ appropriate. ANGLE_BRACKETS is nonzero if the file was bracketed
like <..>. */
static void
handle_missing_header (pfile, fname, angle_brackets)
const char *fname;
int angle_brackets;
{
- int print_dep = CPP_PRINT_DEPS(pfile) > (angle_brackets || pfile->map->sysp);
+ bool print_dep
+ = CPP_OPTION (pfile, deps.style) > (angle_brackets || pfile->map->sysp);
- if (CPP_OPTION (pfile, print_deps_missing_files) && print_dep)
+ if (CPP_OPTION (pfile, deps.missing_files) && print_dep)
deps_add_dep (pfile->deps, fname);
/* If -M was specified, then don't count this as an error, because
we can still produce correct output. Otherwise, we can't produce
the missing file, and we don't know what directory this missing
file exists in. */
else
- cpp_errno (pfile, CPP_PRINT_DEPS (pfile) && ! print_dep
+ cpp_errno (pfile, CPP_OPTION (pfile, deps.style) && ! print_dep
? DL_WARNING: DL_ERROR, fname);
}
cpp_reader *pfile;
const char *fname;
{
+ /* This uses open_file, because we don't allow a PCH to be used as
+ the toplevel compilation (that would prevent re-compiling an
+ existing PCH without deleting it first). */
struct include_file *f = open_file (pfile, fname);
if (f == NULL)
return stack_include_file (pfile, f);
}
+/* Pushes the given file onto the buffer stack. Returns nonzero if
+ successful. */
+bool
+cpp_push_include (pfile, filename)
+ cpp_reader *pfile;
+ const char *filename;
+{
+ cpp_token header;
+
+ header.type = CPP_STRING;
+ header.val.str.text = (const unsigned char *) filename;
+ header.val.str.len = strlen (filename);
+ /* Make the command line directive take up a line. */
+ pfile->line++;
+
+ return _cpp_execute_include (pfile, &header, IT_CMDLINE);
+}
+
/* Do appropriate cleanup when a file INC's buffer is popped off the
input stack. */
void
If we're handling -include or -imacros, use the "" chain, but with
the preprocessor's cwd prepended. */
-static struct search_path *
+static struct cpp_path *
search_from (pfile, type)
cpp_reader *pfile;
enum include_type type;
if (type == IT_CMDLINE)
goto use_cwd;
- /* Ignore the current file's directory if -I- was given. */
- if (CPP_OPTION (pfile, ignore_srcdir))
- return CPP_OPTION (pfile, quote_include);
+ /* Ignore the current file's directory? */
+ if (pfile->quote_ignores_source_dir)
+ return pfile->quote_include;
if (! buffer->search_cached)
{
{
/* We don't guarantee NAME is null-terminated. This saves
allocating and freeing memory. Drop a trailing '/'. */
- buffer->dir.name = buffer->inc->name;
+ buffer->dir.name = (char *) buffer->inc->name;
if (dlen > 1)
dlen--;
}
else
{
use_cwd:
- buffer->dir.name = ".";
+ buffer->dir.name = (char *) ".";
dlen = 1;
}
pfile->max_include_len = dlen;
buffer->dir.len = dlen;
- buffer->dir.next = CPP_OPTION (pfile, quote_include);
+ buffer->dir.next = pfile->quote_include;
buffer->dir.sysp = pfile->map->sysp;
}
such as DOS. The format of the file name map file is just a series
of lines with two tokens on each line. The first token is the name
to map, and the second token is the actual name to use. */
-struct file_name_map
-{
+struct file_name_map {
struct file_name_map *map_next;
char *map_from;
char *map_to;
len = 20;
set = alloc = xmalloc (len + 1);
- if (! is_space(ch))
+ if (! is_space (ch))
{
*set++ = ch;
- while ((ch = getc (f)) != EOF && ! is_space(ch))
+ while ((ch = getc (f)) != EOF && ! is_space (ch))
{
if (set - alloc == len)
{
}
/* This structure holds a linked list of file name maps, one per directory. */
-struct file_name_map_list
-{
+struct file_name_map_list {
struct file_name_map_list *map_list_next;
char *map_list_name;
struct file_name_map *map_list_map;
if (f)
{
int ch;
- int dirlen = strlen (dirname);
while ((ch = getc (f)) != EOF)
{
char *from, *to;
struct file_name_map *ptr;
- if (is_space(ch))
+ if (is_space (ch))
continue;
from = read_filename_string (ch, f);
- while ((ch = getc (f)) != EOF && is_hspace(ch))
+ while ((ch = getc (f)) != EOF && is_hspace (ch))
;
to = read_filename_string (ch, f);
ptr->map_to = to;
else
{
- ptr->map_to = xmalloc (dirlen + strlen (to) + 2);
- strcpy (ptr->map_to, dirname);
- ptr->map_to[dirlen] = '/';
- strcpy (ptr->map_to + dirlen + 1, to);
+ ptr->map_to = concat (dirname, "/", to, NULL);
free (to);
}
remap_filename (pfile, name, loc)
cpp_reader *pfile;
char *name;
- struct search_path *loc;
+ struct cpp_path *loc;
{
struct file_name_map *map;
const char *from, *p;
return name;
}
+/* Set the include chain for "" to QUOTE, for <> to BRACKET. If
+ QUOTE_IGNORES_SOURCE_DIR, then "" includes do not look in the
+ directory of the including file.
+
+ If BRACKET does not lie in the QUOTE chain, it is set to QUOTE. */
+void
+cpp_set_include_chains (pfile, quote, bracket, quote_ignores_source_dir)
+ cpp_reader *pfile;
+ cpp_path *quote, *bracket;
+ int quote_ignores_source_dir;
+{
+ pfile->quote_include = quote;
+ pfile->bracket_include = quote;
+ pfile->quote_ignores_source_dir = quote_ignores_source_dir;
+ pfile->max_include_len = 0;
+
+ for (; quote; quote = quote->next)
+ {
+ quote->name_map = NULL;
+ quote->len = strlen (quote->name);
+ if (quote->len > pfile->max_include_len)
+ pfile->max_include_len = quote->len;
+ if (quote == bracket)
+ pfile->bracket_include = bracket;
+ }
+}
+
/* Returns true if it is safe to remove the final component of path,
when it is followed by a ".." component. We use lstat to avoid
symlinks if we have it. If not, we can still catch errors with
Guarantees no trailing slashes. All transforms reduce the length
of the string. Returns PATH. errno is 0 if no error occurred;
nonzero if an error occurred when using stat () or lstat (). */
-char *
-_cpp_simplify_pathname (path)
- char *path;
+void
+cpp_simplify_path (path)
+ char *path ATTRIBUTE_UNUSED;
{
#ifndef VMS
char *from, *to;
errno = 0;
/* Don't overflow the empty path by putting a '.' in it below. */
if (*path == '\0')
- return path;
+ return;
#if defined (HAVE_DOS_BASED_FILE_SYSTEM)
/* Convert all backslashes to slashes. */
if (to == path)
*to++ = '.';
*to = '\0';
-
- return path;
-#else /* VMS */
+#else /* VMS */
errno = 0;
- return path;
#endif /* !VMS */
}
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