-#if defined(USE_MMALLOC) && defined(HAVE_MMAP)
-
-/* Given the name of a mapped symbol file in SYMSFILENAME, and the timestamp
- of the corresponding symbol file in MTIME, try to open an existing file
- with the name SYMSFILENAME and verify it is more recent than the base
- file by checking it's timestamp against MTIME.
-
- If SYMSFILENAME does not exist (or can't be stat'd), simply returns -1.
-
- If SYMSFILENAME does exist, but is out of date, we check to see if the
- user has specified creation of a mapped file. If so, we don't issue
- any warning message because we will be creating a new mapped file anyway,
- overwriting the old one. If not, then we issue a warning message so that
- the user will know why we aren't using this existing mapped symbol file.
- In either case, we return -1.
-
- If SYMSFILENAME does exist and is not out of date, but can't be opened for
- some reason, then prints an appropriate system error message and returns -1.
-
- Otherwise, returns the open file descriptor. */
-
-static int
-open_existing_mapped_file (char *symsfilename, long mtime, int flags)
-{
- int fd = -1;
- struct stat sbuf;
-
- if (stat (symsfilename, &sbuf) == 0)
- {
- if (sbuf.st_mtime < mtime)
- {
- if (!(flags & OBJF_MAPPED))
- {
- warning ("mapped symbol file `%s' is out of date, ignored it",
- symsfilename);
- }
- }
- else if ((fd = open (symsfilename, O_RDWR)) < 0)
- {
- if (error_pre_print)
- {
- printf_unfiltered (error_pre_print);
- }
- print_sys_errmsg (symsfilename, errno);
- }
- }
- return (fd);
-}
-
-/* Look for a mapped symbol file that corresponds to FILENAME and is more
- recent than MTIME. If MAPPED is nonzero, the user has asked that gdb
- use a mapped symbol file for this file, so create a new one if one does
- not currently exist.
-
- If found, then return an open file descriptor for the file, otherwise
- return -1.
-
- This routine is responsible for implementing the policy that generates
- the name of the mapped symbol file from the name of a file containing
- symbols that gdb would like to read. Currently this policy is to append
- ".syms" to the name of the file.
-
- This routine is also responsible for implementing the policy that
- determines where the mapped symbol file is found (the search path).
- This policy is that when reading an existing mapped file, a file of
- the correct name in the current directory takes precedence over a
- file of the correct name in the same directory as the symbol file.
- When creating a new mapped file, it is always created in the current
- directory. This helps to minimize the chances of a user unknowingly
- creating big mapped files in places like /bin and /usr/local/bin, and
- allows a local copy to override a manually installed global copy (in
- /bin for example). */
-
-static int
-open_mapped_file (char *filename, long mtime, int flags)
-{
- int fd;
- char *symsfilename;
-
- /* First try to open an existing file in the current directory, and
- then try the directory where the symbol file is located. */
-
- symsfilename = concat ("./", lbasename (filename), ".syms", (char *) NULL);
- if ((fd = open_existing_mapped_file (symsfilename, mtime, flags)) < 0)
- {
- xfree (symsfilename);
- symsfilename = concat (filename, ".syms", (char *) NULL);
- fd = open_existing_mapped_file (symsfilename, mtime, flags);
- }
-
- /* If we don't have an open file by now, then either the file does not
- already exist, or the base file has changed since it was created. In
- either case, if the user has specified use of a mapped file, then
- create a new mapped file, truncating any existing one. If we can't
- create one, print a system error message saying why we can't.
-
- By default the file is rw for everyone, with the user's umask taking
- care of turning off the permissions the user wants off. */
-
- if ((fd < 0) && (flags & OBJF_MAPPED))
- {
- xfree (symsfilename);
- symsfilename = concat ("./", lbasename (filename), ".syms",
- (char *) NULL);
- if ((fd = open (symsfilename, O_RDWR | O_CREAT | O_TRUNC, 0666)) < 0)
- {
- if (error_pre_print)
- {
- printf_unfiltered (error_pre_print);
- }
- print_sys_errmsg (symsfilename, errno);
- }
- }
-
- xfree (symsfilename);
- return (fd);
-}
-
-static PTR
-map_to_file (int fd)
-{
- PTR md;
- CORE_ADDR mapto;
-
- md = mmalloc_attach (fd, (PTR) 0);
- if (md != NULL)
- {
- mapto = (CORE_ADDR) mmalloc_getkey (md, 1);
- md = mmalloc_detach (md);
- if (md != NULL)
- {
- /* FIXME: should figure out why detach failed */
- md = NULL;
- }
- else if (mapto != (CORE_ADDR) NULL)
- {
- /* This mapping file needs to be remapped at "mapto" */
- md = mmalloc_attach (fd, (PTR) mapto);
- }
- else
- {
- /* This is a freshly created mapping file. */
- mapto = (CORE_ADDR) mmalloc_findbase (20 * 1024 * 1024);
- if (mapto != 0)
- {
- /* To avoid reusing the freshly created mapping file, at the
- address selected by mmap, we must truncate it before trying
- to do an attach at the address we want. */
- ftruncate (fd, 0);
- md = mmalloc_attach (fd, (PTR) mapto);
- if (md != NULL)
- {
- mmalloc_setkey (md, 1, (PTR) mapto);
- }
- }
- }
- }
- return (md);
-}
-
-#endif /* defined(USE_MMALLOC) && defined(HAVE_MMAP) */
-
-/* Returns a section whose range includes PC and SECTION,
- or NULL if none found. Note the distinction between the return type,
- struct obj_section (which is defined in gdb), and the input type
- struct sec (which is a bfd-defined data type). The obj_section
- contains a pointer to the bfd struct sec section. */
projects / deliverable / binutils-gdb.git / blobdiff