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authorAndrew Cagney <cagney@redhat.com>2004-01-19 19:56:02 +0000
committerAndrew Cagney <cagney@redhat.com>2004-01-19 19:56:02 +0000
commitdfdb8b49e73551dafe81e3c00a862730126e1e6b (patch)
treed254393619ae991078a26be8269a2935da14cf88 /gdb/objfiles.c
parent41c11350289d2b88d0661ad71faf5d22e094397d (diff)
downloadgdb-dfdb8b49e73551dafe81e3c00a862730126e1e6b.tar.gz
2004-01-19 Andrew Cagney <cagney@redhat.com>
* top.h (mapped_symbol_files): Delete declaration. * main.c (captured_main): Delete option "m" and "mapped". * objfiles.c (mapped_symbol_files): Delete variable. * symfile.c (symbol_file_command): Delete mmap code. (symbol_file_add_with_addrs_or_offsets): Ditto. (add_symbol_file_command, reread_separate_symbols): Ditto. * objfiles.h (OBJF_MAPPED): Delete. * objfiles.c (allocate_objfile) [USE_MMALLOC]: Delete. (free_objfile) [USE_MMALLOC]: Ditto. (open_existing_mapped_file): Delete function. (open_mapped_file): Delete function. (map_to_file): Delete function.
Diffstat (limited to 'gdb/objfiles.c')
-rw-r--r--gdb/objfiles.c357
1 files changed, 20 insertions, 337 deletions
diff --git a/gdb/objfiles.c b/gdb/objfiles.c
index 923d59b2c10..fab1c99bf8b 100644
--- a/gdb/objfiles.c
+++ b/gdb/objfiles.c
@@ -48,18 +48,6 @@
/* Prototypes for local functions */
-#if defined(USE_MMALLOC) && defined(HAVE_MMAP)
-
-#include "mmalloc.h"
-
-static int open_existing_mapped_file (char *, long, int);
-
-static int open_mapped_file (char *filename, long mtime, int flags);
-
-static void *map_to_file (int);
-
-#endif /* defined(USE_MMALLOC) && defined(HAVE_MMAP) */
-
static void objfile_alloc_data (struct objfile *objfile);
static void objfile_free_data (struct objfile *objfile);
@@ -71,8 +59,6 @@ struct objfile *current_objfile; /* For symbol file being read in */
struct objfile *symfile_objfile; /* Main symbol table loaded from */
struct objfile *rt_common_objfile; /* For runtime common symbols */
-int mapped_symbol_files; /* Try to use mapped symbol files */
-
/* Locate all mappable sections of a BFD file.
objfile_p_char is a char * to get it through
bfd_map_over_sections; we cast it back to its proper type. */
@@ -150,10 +136,8 @@ build_objfile_section_table (struct objfile *objfile)
new objfile struct.
The FLAGS word contains various bits (OBJF_*) that can be taken as
- requests for specific operations, like trying to open a mapped
- version of the objfile (OBJF_MAPPED). Other bits like
- OBJF_SHARED are simply copied through to the new objfile flags
- member. */
+ requests for specific operations. Other bits like OBJF_SHARED are
+ simply copied through to the new objfile flags member. */
/* NOTE: carlton/2003-02-04: This function is called with args NULL, 0
by jv-lang.c, to create an artificial objfile used to hold
@@ -170,119 +154,6 @@ allocate_objfile (bfd *abfd, int flags)
struct objfile *objfile = NULL;
struct objfile *last_one = NULL;
- if (mapped_symbol_files)
- flags |= OBJF_MAPPED;
-
-#if defined(USE_MMALLOC) && defined(HAVE_MMAP)
- if (abfd != NULL)
- {
-
- /* If we can support mapped symbol files, try to open/reopen the
- mapped file that corresponds to the file from which we wish to
- read symbols. If the objfile is to be mapped, we must malloc
- the structure itself using the mmap version, and arrange that
- all memory allocation for the objfile uses the mmap routines.
- If we are reusing an existing mapped file, from which we get
- our objfile pointer, we have to make sure that we update the
- pointers to the alloc/free functions in the obstack, in case
- these functions have moved within the current gdb. */
-
- int fd;
-
- fd = open_mapped_file (bfd_get_filename (abfd), bfd_get_mtime (abfd),
- flags);
- if (fd >= 0)
- {
- void *md;
-
- if ((md = map_to_file (fd)) == NULL)
- {
- close (fd);
- }
- else if ((objfile = (struct objfile *) mmalloc_getkey (md, 0)) != NULL)
- {
- /* Update memory corruption handler function addresses. */
- init_malloc (md);
- objfile->md = md;
- objfile->mmfd = fd;
- /* Update pointers to functions to *our* copies */
- if (objfile->demangled_names_hash)
- htab_set_functions_ex
- (objfile->demangled_names_hash, htab_hash_string,
- (int (*) (const void *, const void *)) streq, NULL,
- objfile->md, xmcalloc, xmfree);
- obstack_chunkfun (&objfile->psymbol_cache.cache, xmmalloc);
- obstack_freefun (&objfile->psymbol_cache.cache, xmfree);
- obstack_chunkfun (&objfile->macro_cache.cache, xmmalloc);
- obstack_freefun (&objfile->macro_cache.cache, xmfree);
- obstack_chunkfun (&objfile->psymbol_obstack, xmmalloc);
- obstack_freefun (&objfile->psymbol_obstack, xmfree);
- obstack_chunkfun (&objfile->symbol_obstack, xmmalloc);
- obstack_freefun (&objfile->symbol_obstack, xmfree);
- obstack_chunkfun (&objfile->type_obstack, xmmalloc);
- obstack_freefun (&objfile->type_obstack, xmfree);
- /* If already in objfile list, unlink it. */
- unlink_objfile (objfile);
- /* Forget things specific to a particular gdb, may have changed. */
- objfile->sf = NULL;
- }
- else
- {
-
- /* Set up to detect internal memory corruption. MUST be
- done before the first malloc. See comments in
- init_malloc() and mmcheck(). */
-
- init_malloc (md);
-
- objfile = (struct objfile *)
- xmmalloc (md, sizeof (struct objfile));
- memset (objfile, 0, sizeof (struct objfile));
- objfile->md = md;
- objfile->mmfd = fd;
- objfile->flags |= OBJF_MAPPED;
- mmalloc_setkey (objfile->md, 0, objfile);
- obstack_specify_allocation_with_arg (&objfile->psymbol_cache.cache,
- 0, 0, xmmalloc, xmfree,
- objfile->md);
- obstack_specify_allocation_with_arg (&objfile->macro_cache.cache,
- 0, 0, xmmalloc, xmfree,
- objfile->md);
- obstack_specify_allocation_with_arg (&objfile->psymbol_obstack,
- 0, 0, xmmalloc, xmfree,
- objfile->md);
- obstack_specify_allocation_with_arg (&objfile->symbol_obstack,
- 0, 0, xmmalloc, xmfree,
- objfile->md);
- obstack_specify_allocation_with_arg (&objfile->type_obstack,
- 0, 0, xmmalloc, xmfree,
- objfile->md);
- }
- }
-
- if ((flags & OBJF_MAPPED) && (objfile == NULL))
- {
- warning ("symbol table for '%s' will not be mapped",
- bfd_get_filename (abfd));
- flags &= ~OBJF_MAPPED;
- }
- }
-#else /* !defined(USE_MMALLOC) || !defined(HAVE_MMAP) */
-
- if (flags & OBJF_MAPPED)
- {
- warning ("mapped symbol tables are not supported on this machine; missing or broken mmap().");
-
- /* Turn off the global flag so we don't try to do mapped symbol tables
- any more, which shuts up gdb unless the user specifically gives the
- "mapped" keyword again. */
-
- mapped_symbol_files = 0;
- flags &= ~OBJF_MAPPED;
- }
-
-#endif /* defined(USE_MMALLOC) && defined(HAVE_MMAP) */
-
/* If we don't support mapped symbol files, didn't ask for the file to be
mapped, or failed to open the mapped file for some reason, then revert
back to an unmapped objfile. */
@@ -300,7 +171,6 @@ allocate_objfile (bfd *abfd, int flags)
xfree);
obstack_specify_allocation (&objfile->type_obstack, 0, 0, xmalloc,
xfree);
- flags &= ~OBJF_MAPPED;
terminate_minimal_symbol_table (objfile);
}
@@ -545,52 +415,27 @@ free_objfile (struct objfile *objfile)
to call this here. */
clear_pc_function_cache ();
- /* The last thing we do is free the objfile struct itself for the
- non-reusable case, or detach from the mapped file for the
- reusable case. Note that the mmalloc_detach or the xmfree() is
- the last thing we can do with this objfile. */
-
-#if defined(USE_MMALLOC) && defined(HAVE_MMAP)
-
- if (objfile->flags & OBJF_MAPPED)
- {
- /* Remember the fd so we can close it. We can't close it before
- doing the detach, and after the detach the objfile is gone. */
- int mmfd;
-
- mmfd = objfile->mmfd;
- mmalloc_detach (objfile->md);
- objfile = NULL;
- close (mmfd);
- }
-
-#endif /* defined(USE_MMALLOC) && defined(HAVE_MMAP) */
+ /* The last thing we do is free the objfile struct itself. */
- /* If we still have an objfile, then either we don't support reusable
- objfiles or this one was not reusable. So free it normally. */
-
- if (objfile != NULL)
+ objfile_free_data (objfile);
+ if (objfile->name != NULL)
{
- objfile_free_data (objfile);
- if (objfile->name != NULL)
- {
- xmfree (objfile->md, objfile->name);
- }
- if (objfile->global_psymbols.list)
- xmfree (objfile->md, objfile->global_psymbols.list);
- if (objfile->static_psymbols.list)
- xmfree (objfile->md, objfile->static_psymbols.list);
- /* Free the obstacks for non-reusable objfiles */
- bcache_xfree (objfile->psymbol_cache);
- bcache_xfree (objfile->macro_cache);
- if (objfile->demangled_names_hash)
- htab_delete (objfile->demangled_names_hash);
- obstack_free (&objfile->psymbol_obstack, 0);
- obstack_free (&objfile->symbol_obstack, 0);
- obstack_free (&objfile->type_obstack, 0);
- xmfree (objfile->md, objfile);
- objfile = NULL;
+ xmfree (objfile->md, objfile->name);
}
+ if (objfile->global_psymbols.list)
+ xmfree (objfile->md, objfile->global_psymbols.list);
+ if (objfile->static_psymbols.list)
+ xmfree (objfile->md, objfile->static_psymbols.list);
+ /* Free the obstacks for non-reusable objfiles */
+ bcache_xfree (objfile->psymbol_cache);
+ bcache_xfree (objfile->macro_cache);
+ if (objfile->demangled_names_hash)
+ htab_delete (objfile->demangled_names_hash);
+ obstack_free (&objfile->psymbol_obstack, 0);
+ obstack_free (&objfile->symbol_obstack, 0);
+ obstack_free (&objfile->type_obstack, 0);
+ xmfree (objfile->md, objfile);
+ objfile = NULL;
}
static void
@@ -882,168 +727,6 @@ have_minimal_symbols (void)
return 0;
}
-#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 void *
-map_to_file (int fd)
-{
- void *md;
- CORE_ADDR mapto;
-
- md = mmalloc_attach (fd, 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, 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, mapto);
- if (md != NULL)
- {
- mmalloc_setkey (md, 1, 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