From 78a4a9b940711aae9aaa87fb788ed78862477266 Mon Sep 17 00:00:00 2001 From: Andrew Cagney Date: Mon, 19 Jan 2004 19:56:02 +0000 Subject: [PATCH] 2004-01-19 Andrew Cagney * 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. --- gdb/ChangeLog | 15 +++ gdb/main.c | 2 - gdb/objfiles.c | 357 +++---------------------------------------------- gdb/objfiles.h | 9 -- gdb/symfile.c | 86 ++++-------- gdb/top.h | 1 - 6 files changed, 63 insertions(+), 407 deletions(-) diff --git a/gdb/ChangeLog b/gdb/ChangeLog index 1967a1e4f07..ac3af18e241 100644 --- a/gdb/ChangeLog +++ b/gdb/ChangeLog @@ -1,3 +1,18 @@ +2004-01-19 Andrew Cagney + + * 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. + 2004-01-19 Kevin Buettner * infrun.c (step_into_function): Account for possible breakpoint diff --git a/gdb/main.c b/gdb/main.c index 2d552c09b12..303bf1c233b 100644 --- a/gdb/main.c +++ b/gdb/main.c @@ -264,8 +264,6 @@ captured_main (void *data) {"dbx", no_argument, &dbx_commands, 1}, {"readnow", no_argument, &readnow_symbol_files, 1}, {"r", no_argument, &readnow_symbol_files, 1}, - {"mapped", no_argument, &mapped_symbol_files, 1}, - {"m", no_argument, &mapped_symbol_files, 1}, {"quiet", no_argument, &quiet, 1}, {"q", no_argument, &quiet, 1}, {"silent", no_argument, &quiet, 1}, 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 diff --git a/gdb/objfiles.h b/gdb/objfiles.h index ebc10b36828..732af4d3d01 100644 --- a/gdb/objfiles.h +++ b/gdb/objfiles.h @@ -470,15 +470,6 @@ struct objfile /* Defines for the objfile flag word. */ -/* Gdb can arrange to allocate storage for all objects related to a - particular objfile in a designated section of its address space, - managed at a low level by mmap() and using a special version of - malloc that handles malloc/free/realloc on top of the mmap() interface. - This allows the "internal gdb state" for a particular objfile to be - dumped to a gdb state file and subsequently reloaded at a later time. */ - -#define OBJF_MAPPED (1 << 0) /* Objfile data is mmap'd */ - /* When using mapped/remapped predigested gdb symbol information, we need a flag that indicates that we have previously done an initial symbol table read from this particular objfile. We can't just look for the diff --git a/gdb/symfile.c b/gdb/symfile.c index 430cf2dbd2c..97800c83061 100644 --- a/gdb/symfile.c +++ b/gdb/symfile.c @@ -847,43 +847,22 @@ symbol_file_add_with_addrs_or_offsets (char *name, int from_tty, orig_addrs->other[i] = addrs->other[i]; } - /* If the objfile uses a mapped symbol file, and we have a psymtab for - it, then skip reading any symbols at this time. */ - - if ((objfile->flags & OBJF_MAPPED) && (objfile->flags & OBJF_SYMS)) + /* We either created a new mapped symbol table, mapped an existing + symbol table file which has not had initial symbol reading + performed, or need to read an unmapped symbol table. */ + if (from_tty || info_verbose) { - /* We mapped in an existing symbol table file that already has had - initial symbol reading performed, so we can skip that part. Notify - the user that instead of reading the symbols, they have been mapped. - */ - if (from_tty || info_verbose) + if (pre_add_symbol_hook) + pre_add_symbol_hook (name); + else { - printf_unfiltered ("Mapped symbols for %s...", name); + printf_unfiltered ("Reading symbols from %s...", name); wrap_here (""); gdb_flush (gdb_stdout); } - init_entry_point_info (objfile); - find_sym_fns (objfile); - } - else - { - /* We either created a new mapped symbol table, mapped an existing - symbol table file which has not had initial symbol reading - performed, or need to read an unmapped symbol table. */ - if (from_tty || info_verbose) - { - if (pre_add_symbol_hook) - pre_add_symbol_hook (name); - else - { - printf_unfiltered ("Reading symbols from %s...", name); - wrap_here (""); - gdb_flush (gdb_stdout); - } - } - syms_from_objfile (objfile, addrs, offsets, num_offsets, - mainline, from_tty); } + syms_from_objfile (objfile, addrs, offsets, num_offsets, + mainline, from_tty); /* We now have at least a partial symbol table. Check to see if the user requested that all symbols be read on initial access via either @@ -1209,20 +1188,16 @@ symbol_file_command (char *args, int from_tty) cleanups = make_cleanup_freeargv (argv); while (*argv != NULL) { - if (strcmp (*argv, "-mapped") == 0) - flags |= OBJF_MAPPED; - else - if (strcmp (*argv, "-readnow") == 0) - flags |= OBJF_READNOW; - else - if (**argv == '-') - error ("unknown option `%s'", *argv); - else - { - name = *argv; - - symbol_file_add_main_1 (name, from_tty, flags); - } + if (strcmp (*argv, "-readnow") == 0) + flags |= OBJF_READNOW; + else if (**argv == '-') + error ("unknown option `%s'", *argv); + else + { + name = *argv; + + symbol_file_add_main_1 (name, from_tty, flags); + } argv++; } @@ -1737,17 +1712,13 @@ add_symbol_file_command (char *args, int from_tty) if (*arg == '-') { - if (strcmp (arg, "-mapped") == 0) - flags |= OBJF_MAPPED; - else - if (strcmp (arg, "-readnow") == 0) - flags |= OBJF_READNOW; - else - if (strcmp (arg, "-s") == 0) - { - expecting_sec_name = 1; - expecting_sec_addr = 1; - } + if (strcmp (arg, "-readnow") == 0) + flags |= OBJF_READNOW; + else if (strcmp (arg, "-s") == 0) + { + expecting_sec_name = 1; + expecting_sec_addr = 1; + } } else { @@ -2096,8 +2067,7 @@ reread_separate_symbols (struct objfile *objfile) 0, /* No addr table. */ objfile->section_offsets, objfile->num_sections, 0, /* Not mainline. See comments about this above. */ - objfile->flags & (OBJF_MAPPED | OBJF_REORDERED - | OBJF_SHARED | OBJF_READNOW + objfile->flags & (OBJF_REORDERED | OBJF_SHARED | OBJF_READNOW | OBJF_USERLOADED))); objfile->separate_debug_objfile->separate_debug_objfile_backlink = objfile; diff --git a/gdb/top.h b/gdb/top.h index 50361dc07ab..88b7e7a6cde 100644 --- a/gdb/top.h +++ b/gdb/top.h @@ -56,7 +56,6 @@ extern char *get_prompt (void); extern void set_prompt (char *); /* From random places. */ -extern int mapped_symbol_files; extern int readnow_symbol_files; /* Perform _initialize initialization */ -- 2.30.2