X-Git-Url: http://drtracing.org/?a=blobdiff_plain;f=gdb%2Fobjfiles.c;h=6082155c5e502c551d0268d11867f0222265d9a8;hb=2f6e5d7e9d6a416093702b75a536e8fed5c30d03;hp=39f5623749df987d0fabce5c2a7aac8961b9bd69;hpb=de4f826b0f698dc2858f6eda71f2613a89579c50;p=deliverable%2Fbinutils-gdb.git
diff --git a/gdb/objfiles.c b/gdb/objfiles.c
index 39f5623749..6082155c5e 100644
--- a/gdb/objfiles.c
+++ b/gdb/objfiles.c
@@ -1,7 +1,7 @@
/* GDB routines for manipulating objfiles.
- Copyright 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
- 2001, 2002, 2003 Free Software Foundation, Inc.
+ Copyright (C) 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001,
+ 2002, 2003, 2004, 2007, 2008, 2009 Free Software Foundation, Inc.
Contributed by Cygnus Support, using pieces from other GDB modules.
@@ -9,7 +9,7 @@
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 2 of the License, or
+ the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
@@ -18,9 +18,7 @@
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA. */
+ along with this program. If not, see . */
/* This file contains support routines for creating, manipulating, and
destroying objfile structures. */
@@ -33,7 +31,11 @@
#include "gdb-stabs.h"
#include "target.h"
#include "bcache.h"
+#include "mdebugread.h"
+#include "expression.h"
+#include "parser-defs.h"
+#include "gdb_assert.h"
#include
#include "gdb_stat.h"
#include
@@ -44,48 +46,80 @@
#include "breakpoint.h"
#include "block.h"
#include "dictionary.h"
+#include "source.h"
+#include "addrmap.h"
+#include "arch-utils.h"
+#include "exec.h"
+#include "observer.h"
+#include "complaints.h"
/* Prototypes for local functions */
-#if defined(USE_MMALLOC) && defined(HAVE_MMAP)
+static void objfile_alloc_data (struct objfile *objfile);
+static void objfile_free_data (struct objfile *objfile);
-#include "mmalloc.h"
+/* Externally visible variables that are owned by this module.
+ See declarations in objfile.h for more info. */
-static int open_existing_mapped_file (char *, long, int);
+struct objfile *current_objfile; /* For symbol file being read in */
+struct objfile *rt_common_objfile; /* For runtime common symbols */
-static int open_mapped_file (char *filename, long mtime, int flags);
+struct objfile_pspace_info
+{
+ int objfiles_changed_p;
+ struct obj_section **sections;
+ int num_sections;
+};
-static void *map_to_file (int);
+/* Per-program-space data key. */
+static const struct program_space_data *objfiles_pspace_data;
-#endif /* defined(USE_MMALLOC) && defined(HAVE_MMAP) */
+static void
+objfiles_pspace_data_cleanup (struct program_space *pspace, void *arg)
+{
+ struct objfile_pspace_info *info;
-static void add_to_objfile_sections (bfd *, sec_ptr, void *);
+ info = program_space_data (pspace, objfiles_pspace_data);
+ if (info != NULL)
+ {
+ xfree (info->sections);
+ xfree (info);
+ }
+}
-/* Externally visible variables that are owned by this module.
- See declarations in objfile.h for more info. */
+/* Get the current svr4 data. If none is found yet, add it now. This
+ function always returns a valid object. */
-struct objfile *object_files; /* Linked list of all objfiles */
-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 */
+static struct objfile_pspace_info *
+get_objfile_pspace_data (struct program_space *pspace)
+{
+ struct objfile_pspace_info *info;
+
+ info = program_space_data (pspace, objfiles_pspace_data);
+ if (info == NULL)
+ {
+ info = XZALLOC (struct objfile_pspace_info);
+ set_program_space_data (pspace, objfiles_pspace_data, info);
+ }
+
+ return info;
+}
-int mapped_symbol_files; /* Try to use mapped symbol files */
+/* Records whether any objfiles appeared or disappeared since we last updated
+ address to obj section map. */
/* 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. */
-#ifndef TARGET_KEEP_SECTION
-#define TARGET_KEEP_SECTION(ASECT) 0
-#endif
-
/* Called via bfd_map_over_sections to build up the section table that
the objfile references. The objfile contains pointers to the start
of the table (objfile->sections) and to the first location after
the end of the table (objfile->sections_end). */
static void
-add_to_objfile_sections (bfd *abfd, sec_ptr asect, void *objfile_p_char)
+add_to_objfile_sections (struct bfd *abfd, struct bfd_section *asect,
+ void *objfile_p_char)
{
struct objfile *objfile = (struct objfile *) objfile_p_char;
struct obj_section section;
@@ -93,19 +127,17 @@ add_to_objfile_sections (bfd *abfd, sec_ptr asect, void *objfile_p_char)
aflag = bfd_get_section_flags (abfd, asect);
- if (!(aflag & SEC_ALLOC) && !(TARGET_KEEP_SECTION (asect)))
+ if (!(aflag & SEC_ALLOC))
return;
if (0 == bfd_section_size (abfd, asect))
return;
- section.offset = 0;
section.objfile = objfile;
section.the_bfd_section = asect;
section.ovly_mapped = 0;
- section.addr = bfd_section_vma (abfd, asect);
- section.endaddr = section.addr + bfd_section_size (abfd, asect);
- obstack_grow (&objfile->psymbol_obstack, (char *) §ion, sizeof (section));
- objfile->sections_end = (struct obj_section *) (((unsigned long) objfile->sections_end) + 1);
+ obstack_grow (&objfile->objfile_obstack, (char *) §ion, sizeof (section));
+ objfile->sections_end
+ = (struct obj_section *) (((size_t) objfile->sections_end) + 1);
}
/* Builds a section table for OBJFILE.
@@ -130,14 +162,14 @@ build_objfile_section_table (struct objfile *objfile)
/* objfile->sections can be already set when reading a mapped symbol
file. I believe that we do need to rebuild the section table in
this case (we rebuild other things derived from the bfd), but we
- can't free the old one (it's in the psymbol_obstack). So we just
+ can't free the old one (it's in the objfile_obstack). So we just
waste some memory. */
objfile->sections_end = 0;
- bfd_map_over_sections (objfile->obfd, add_to_objfile_sections, (char *) objfile);
- objfile->sections = (struct obj_section *)
- obstack_finish (&objfile->psymbol_obstack);
- objfile->sections_end = objfile->sections + (unsigned long) objfile->sections_end;
+ bfd_map_over_sections (objfile->obfd,
+ add_to_objfile_sections, (void *) objfile);
+ objfile->sections = obstack_finish (&objfile->objfile_obstack);
+ objfile->sections_end = objfile->sections + (size_t) objfile->sections_end;
return (0);
}
@@ -147,10 +179,8 @@ 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
@@ -164,178 +194,62 @@ build_objfile_section_table (struct objfile *objfile)
struct objfile *
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;
- }
+ struct objfile *objfile;
-#endif /* defined(USE_MMALLOC) && defined(HAVE_MMAP) */
+ objfile = (struct objfile *) xmalloc (sizeof (struct objfile));
+ memset (objfile, 0, sizeof (struct objfile));
+ objfile->psymbol_cache = bcache_xmalloc ();
+ objfile->macro_cache = bcache_xmalloc ();
+ /* We could use obstack_specify_allocation here instead, but
+ gdb_obstack.h specifies the alloc/dealloc functions. */
+ obstack_init (&objfile->objfile_obstack);
+ terminate_minimal_symbol_table (objfile);
- /* 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. */
-
- if (objfile == NULL)
- {
- objfile = (struct objfile *) xmalloc (sizeof (struct objfile));
- memset (objfile, 0, sizeof (struct objfile));
- objfile->md = NULL;
- objfile->psymbol_cache = bcache_xmalloc ();
- objfile->macro_cache = bcache_xmalloc ();
- obstack_specify_allocation (&objfile->psymbol_obstack, 0, 0, xmalloc,
- xfree);
- obstack_specify_allocation (&objfile->symbol_obstack, 0, 0, xmalloc,
- xfree);
- obstack_specify_allocation (&objfile->type_obstack, 0, 0, xmalloc,
- xfree);
- flags &= ~OBJF_MAPPED;
-
- terminate_minimal_symbol_table (objfile);
- }
+ objfile_alloc_data (objfile);
/* Update the per-objfile information that comes from the bfd, ensuring
that any data that is reference is saved in the per-objfile data
region. */
- objfile->obfd = abfd;
+ objfile->obfd = gdb_bfd_ref (abfd);
if (objfile->name != NULL)
{
- xmfree (objfile->md, objfile->name);
+ xfree (objfile->name);
}
if (abfd != NULL)
{
- objfile->name = mstrsave (objfile->md, bfd_get_filename (abfd));
+ /* Look up the gdbarch associated with the BFD. */
+ objfile->gdbarch = gdbarch_from_bfd (abfd);
+
+ objfile->name = xstrdup (bfd_get_filename (abfd));
objfile->mtime = bfd_get_mtime (abfd);
/* Build section table. */
if (build_objfile_section_table (objfile))
{
- error ("Can't find the file sections in `%s': %s",
+ error (_("Can't find the file sections in `%s': %s"),
objfile->name, bfd_errmsg (bfd_get_error ()));
}
}
else
{
- objfile->name = mstrsave (objfile->md, "<>");
+ objfile->name = xstrdup ("<>");
}
+ objfile->pspace = current_program_space;
+
/* Initialize the section indexes for this objfile, so that we can
later detect if they are used w/o being properly assigned to. */
- objfile->sect_index_text = -1;
- objfile->sect_index_data = -1;
- objfile->sect_index_bss = -1;
- objfile->sect_index_rodata = -1;
+ objfile->sect_index_text = -1;
+ objfile->sect_index_data = -1;
+ objfile->sect_index_bss = -1;
+ objfile->sect_index_rodata = -1;
+
+ /* We don't yet have a C++-specific namespace symtab. */
+
+ objfile->cp_namespace_symtab = NULL;
/* Add this file onto the tail of the linked list of other such files. */
@@ -344,6 +258,8 @@ allocate_objfile (bfd *abfd, int flags)
object_files = objfile;
else
{
+ struct objfile *last_one;
+
for (last_one = object_files;
last_one->next;
last_one = last_one->next);
@@ -353,20 +269,83 @@ allocate_objfile (bfd *abfd, int flags)
/* Save passed in flag bits. */
objfile->flags |= flags;
- return (objfile);
+ /* Rebuild section map next time we need it. */
+ get_objfile_pspace_data (objfile->pspace)->objfiles_changed_p = 1;
+
+ return objfile;
}
+/* Retrieve the gdbarch associated with OBJFILE. */
+struct gdbarch *
+get_objfile_arch (struct objfile *objfile)
+{
+ return objfile->gdbarch;
+}
+
+/* Initialize entry point information for this objfile. */
+
+void
+init_entry_point_info (struct objfile *objfile)
+{
+ /* Save startup file's range of PC addresses to help blockframe.c
+ decide where the bottom of the stack is. */
+
+ if (bfd_get_file_flags (objfile->obfd) & EXEC_P)
+ {
+ /* Executable file -- record its entry point so we'll recognize
+ the startup file because it contains the entry point. */
+ objfile->ei.entry_point = bfd_get_start_address (objfile->obfd);
+ }
+ else if (bfd_get_file_flags (objfile->obfd) & DYNAMIC
+ && bfd_get_start_address (objfile->obfd) != 0)
+ /* Some shared libraries may have entry points set and be
+ runnable. There's no clear way to indicate this, so just check
+ for values other than zero. */
+ objfile->ei.entry_point = bfd_get_start_address (objfile->obfd);
+ else
+ {
+ /* Examination of non-executable.o files. Short-circuit this stuff. */
+ objfile->ei.entry_point = INVALID_ENTRY_POINT;
+ }
+}
+
+/* Get current entry point address. */
+
+CORE_ADDR
+entry_point_address (void)
+{
+ struct gdbarch *gdbarch;
+ CORE_ADDR entry_point;
+
+ if (symfile_objfile == NULL)
+ return 0;
+
+ gdbarch = get_objfile_arch (symfile_objfile);
+
+ entry_point = symfile_objfile->ei.entry_point;
+
+ /* Make certain that the address points at real code, and not a
+ function descriptor. */
+ entry_point = gdbarch_convert_from_func_ptr_addr (gdbarch, entry_point,
+ ¤t_target);
+
+ /* Remove any ISA markers, so that this matches entries in the
+ symbol table. */
+ entry_point = gdbarch_addr_bits_remove (gdbarch, entry_point);
+
+ return entry_point;
+}
/* Create the terminating entry of OBJFILE's minimal symbol table.
If OBJFILE->msymbols is zero, allocate a single entry from
- OBJFILE->symbol_obstack; otherwise, just initialize
+ OBJFILE->objfile_obstack; otherwise, just initialize
OBJFILE->msymbols[OBJFILE->minimal_symbol_count]. */
void
terminate_minimal_symbol_table (struct objfile *objfile)
{
if (! objfile->msymbols)
objfile->msymbols = ((struct minimal_symbol *)
- obstack_alloc (&objfile->symbol_obstack,
+ obstack_alloc (&objfile->objfile_obstack,
sizeof (objfile->msymbols[0])));
{
@@ -374,9 +353,7 @@ terminate_minimal_symbol_table (struct objfile *objfile)
= &objfile->msymbols[objfile->minimal_symbol_count];
memset (m, 0, sizeof (*m));
- DEPRECATED_SYMBOL_NAME (m) = NULL;
- SYMBOL_VALUE_ADDRESS (m) = 0;
- MSYMBOL_INFO (m) = NULL;
+ /* Don't rely on these enumeration values being 0's. */
MSYMBOL_TYPE (m) = mst_unknown;
SYMBOL_INIT_LANGUAGE_SPECIFIC (m, language_unknown);
}
@@ -404,7 +381,7 @@ put_objfile_before (struct objfile *objfile, struct objfile *before_this)
}
internal_error (__FILE__, __LINE__,
- "put_objfile_before: before objfile not in list");
+ _("put_objfile_before: before objfile not in list"));
}
/* Put OBJFILE at the front of the list. */
@@ -456,13 +433,13 @@ unlink_objfile (struct objfile *objfile)
}
internal_error (__FILE__, __LINE__,
- "unlink_objfile: objfile already unlinked");
+ _("unlink_objfile: objfile already unlinked"));
}
/* Destroy an objfile and all the symtabs and psymtabs under it. Note
- that as much as possible is allocated on the symbol_obstack and
- psymbol_obstack, so that the memory can be efficiently freed.
+ that as much as possible is allocated on the objfile_obstack
+ so that the memory can be efficiently freed.
Things which we do NOT free because they are not in malloc'd memory
or not in memory specific to the objfile include:
@@ -491,6 +468,10 @@ free_objfile (struct objfile *objfile)
objfile->separate_debug_objfile_backlink->separate_debug_objfile = NULL;
}
+ /* Remove any references to this objfile in the global value
+ lists. */
+ preserve_values (objfile);
+
/* First do any symbol file specific actions required when we are
finished with a particular symbol file. Note that if the objfile
is using reusable symbol information (via mmalloc) then each of
@@ -503,23 +484,17 @@ free_objfile (struct objfile *objfile)
(*objfile->sf->sym_finish) (objfile);
}
- /* We always close the bfd. */
+ /* Discard any data modules have associated with the objfile. */
+ objfile_free_data (objfile);
- if (objfile->obfd != NULL)
- {
- char *name = bfd_get_filename (objfile->obfd);
- if (!bfd_close (objfile->obfd))
- warning ("cannot close \"%s\": %s",
- name, bfd_errmsg (bfd_get_error ()));
- xfree (name);
- }
+ gdb_bfd_unref (objfile->obfd);
/* Remove it from the chain of all objfiles. */
unlink_objfile (objfile);
- /* If we are going to free the runtime common objfile, mark it
- as unallocated. */
+ if (objfile == symfile_objfile)
+ symfile_objfile = NULL;
if (objfile == rt_common_objfile)
rt_common_objfile = NULL;
@@ -531,55 +506,51 @@ free_objfile (struct objfile *objfile)
is unknown, but we play it safe for now and keep each action until
it is shown to be no longer needed. */
- /* I *think* all our callers call clear_symtab_users. If so, no need
- to call this here. */
+ /* Not all our callers call clear_symtab_users (objfile_purge_solibs,
+ for example), so we need 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. */
+ /* Clear globals which might have pointed into a removed objfile.
+ FIXME: It's not clear which of these are supposed to persist
+ between expressions and which ought to be reset each time. */
+ expression_context_block = NULL;
+ innermost_block = NULL;
-#if defined(USE_MMALLOC) && defined(HAVE_MMAP)
+ /* Check to see if the current_source_symtab belongs to this objfile,
+ and if so, call clear_current_source_symtab_and_line. */
- 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);
- }
+ {
+ struct symtab_and_line cursal = get_current_source_symtab_and_line ();
+ struct symtab *s;
-#endif /* defined(USE_MMALLOC) && defined(HAVE_MMAP) */
+ ALL_OBJFILE_SYMTABS (objfile, s)
+ {
+ if (s == cursal.symtab)
+ clear_current_source_symtab_and_line ();
+ }
+ }
- /* If we still have an objfile, then either we don't support reusable
- objfiles or this one was not reusable. So free it normally. */
+ /* The last thing we do is free the objfile struct itself. */
- if (objfile != NULL)
+ if (objfile->name != NULL)
{
- 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;
+ xfree (objfile->name);
}
+ if (objfile->global_psymbols.list)
+ xfree (objfile->global_psymbols.list);
+ if (objfile->static_psymbols.list)
+ xfree (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->objfile_obstack, 0);
+
+ /* Rebuild section map next time we need it. */
+ get_objfile_pspace_data (objfile->pspace)->objfiles_changed_p = 1;
+
+ xfree (objfile);
}
static void
@@ -613,6 +584,7 @@ free_all_objfiles (void)
void
objfile_relocate (struct objfile *objfile, struct section_offsets *new_offsets)
{
+ struct obj_section *s;
struct section_offsets *delta =
((struct section_offsets *)
alloca (SIZEOF_N_SECTION_OFFSETS (objfile->num_sections)));
@@ -654,6 +626,10 @@ objfile_relocate (struct objfile *objfile, struct section_offsets *new_offsets)
continue;
bv = BLOCKVECTOR (s);
+ if (BLOCKVECTOR_MAP (bv))
+ addrmap_relocate (BLOCKVECTOR_MAP (bv),
+ ANOFFSET (delta, s->block_line_section));
+
for (i = 0; i < BLOCKVECTOR_NBLOCKS (bv); ++i)
{
struct block *b;
@@ -673,22 +649,12 @@ objfile_relocate (struct objfile *objfile, struct section_offsets *new_offsets)
But I'm leaving out that test, on the theory that
they can't possibly pass the tests below. */
if ((SYMBOL_CLASS (sym) == LOC_LABEL
- || SYMBOL_CLASS (sym) == LOC_STATIC
- || SYMBOL_CLASS (sym) == LOC_INDIRECT)
+ || SYMBOL_CLASS (sym) == LOC_STATIC)
&& SYMBOL_SECTION (sym) >= 0)
{
SYMBOL_VALUE_ADDRESS (sym) +=
ANOFFSET (delta, SYMBOL_SECTION (sym));
}
-#ifdef MIPS_EFI_SYMBOL_NAME
- /* Relocate Extra Function Info for ecoff. */
-
- else if (SYMBOL_CLASS (sym) == LOC_CONST
- && SYMBOL_DOMAIN (sym) == LABEL_DOMAIN
- && strcmp (DEPRECATED_SYMBOL_NAME (sym), MIPS_EFI_SYMBOL_NAME) == 0)
- ecoff_relocate_efi (sym, ANOFFSET (delta,
- s->block_line_section));
-#endif
}
}
}
@@ -737,12 +703,6 @@ objfile_relocate (struct objfile *objfile, struct section_offsets *new_offsets)
to be out of order. */
msymbols_sort (objfile);
- {
- int i;
- for (i = 0; i < objfile->num_sections; ++i)
- (objfile->section_offsets)->offsets[i] = ANOFFSET (new_offsets, i);
- }
-
if (objfile->ei.entry_point != ~(CORE_ADDR) 0)
{
/* Relocate ei.entry_point with its section offset, use SECT_OFF_TEXT
@@ -756,42 +716,67 @@ objfile_relocate (struct objfile *objfile, struct section_offsets *new_offsets)
}
{
- struct obj_section *s;
- bfd *abfd;
-
- abfd = objfile->obfd;
-
- ALL_OBJFILE_OSECTIONS (objfile, s)
- {
- int idx = s->the_bfd_section->index;
-
- s->addr += ANOFFSET (delta, idx);
- s->endaddr += ANOFFSET (delta, idx);
- }
+ int i;
+ for (i = 0; i < objfile->num_sections; ++i)
+ (objfile->section_offsets)->offsets[i] = ANOFFSET (new_offsets, i);
}
- if (objfile->ei.entry_func_lowpc != INVALID_ENTRY_LOWPC)
- {
- objfile->ei.entry_func_lowpc += ANOFFSET (delta, SECT_OFF_TEXT (objfile));
- objfile->ei.entry_func_highpc += ANOFFSET (delta, SECT_OFF_TEXT (objfile));
- }
+ /* Rebuild section map next time we need it. */
+ get_objfile_pspace_data (objfile->pspace)->objfiles_changed_p = 1;
- if (objfile->ei.entry_file_lowpc != INVALID_ENTRY_LOWPC)
+ /* Update the table in exec_ops, used to read memory. */
+ ALL_OBJFILE_OSECTIONS (objfile, s)
{
- objfile->ei.entry_file_lowpc += ANOFFSET (delta, SECT_OFF_TEXT (objfile));
- objfile->ei.entry_file_highpc += ANOFFSET (delta, SECT_OFF_TEXT (objfile));
- }
+ int idx = s->the_bfd_section->index;
- if (objfile->ei.main_func_lowpc != INVALID_ENTRY_LOWPC)
- {
- objfile->ei.main_func_lowpc += ANOFFSET (delta, SECT_OFF_TEXT (objfile));
- objfile->ei.main_func_highpc += ANOFFSET (delta, SECT_OFF_TEXT (objfile));
+ exec_set_section_address (bfd_get_filename (objfile->obfd), idx,
+ obj_section_addr (s));
}
/* Relocate breakpoints as necessary, after things are relocated. */
breakpoint_re_set ();
}
+/* Return non-zero if OBJFILE has partial symbols. */
+
+int
+objfile_has_partial_symbols (struct objfile *objfile)
+{
+ return objfile->psymtabs != NULL;
+}
+
+/* Return non-zero if OBJFILE has full symbols. */
+
+int
+objfile_has_full_symbols (struct objfile *objfile)
+{
+ return objfile->symtabs != NULL;
+}
+
+/* Return non-zero if OBJFILE has full or partial symbols, either directly
+ or throught its separate debug file. */
+
+int
+objfile_has_symbols (struct objfile *objfile)
+{
+ struct objfile *separate_objfile;
+
+ if (objfile_has_partial_symbols (objfile)
+ || objfile_has_full_symbols (objfile))
+ return 1;
+
+ separate_objfile = objfile->separate_debug_objfile;
+ if (separate_objfile == NULL)
+ return 0;
+
+ if (objfile_has_partial_symbols (separate_objfile)
+ || objfile_has_full_symbols (separate_objfile))
+ return 1;
+
+ return 0;
+}
+
+
/* Many places in gdb want to test just to see if we have any partial
symbols available. This function returns zero if none are currently
available, nonzero otherwise. */
@@ -803,10 +788,8 @@ have_partial_symbols (void)
ALL_OBJFILES (ofp)
{
- if (ofp->psymtabs != NULL)
- {
- return 1;
- }
+ if (objfile_has_partial_symbols (ofp))
+ return 1;
}
return 0;
}
@@ -822,10 +805,8 @@ have_full_symbols (void)
ALL_OBJFILES (ofp)
{
- if (ofp->symtabs != NULL)
- {
- return 1;
- }
+ if (objfile_has_full_symbols (ofp))
+ return 1;
}
return 0;
}
@@ -871,195 +852,347 @@ have_minimal_symbols (void)
return 0;
}
-#if defined(USE_MMALLOC) && defined(HAVE_MMAP)
+/* Qsort comparison function. */
-/* 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.
+static int
+qsort_cmp (const void *a, const void *b)
+{
+ const struct obj_section *sect1 = *(const struct obj_section **) a;
+ const struct obj_section *sect2 = *(const struct obj_section **) b;
+ const CORE_ADDR sect1_addr = obj_section_addr (sect1);
+ const CORE_ADDR sect2_addr = obj_section_addr (sect2);
+
+ if (sect1_addr < sect2_addr)
+ return -1;
+ else if (sect1_addr > sect2_addr)
+ return 1;
+ else
+ {
+ /* Sections are at the same address. This could happen if
+ A) we have an objfile and a separate debuginfo.
+ B) we are confused, and have added sections without proper relocation,
+ or something like that. */
+
+ const struct objfile *const objfile1 = sect1->objfile;
+ const struct objfile *const objfile2 = sect2->objfile;
+
+ if (objfile1->separate_debug_objfile == objfile2
+ || objfile2->separate_debug_objfile == objfile1)
+ {
+ /* Case A. The ordering doesn't matter: separate debuginfo files
+ will be filtered out later. */
+
+ return 0;
+ }
+
+ /* Case B. Maintain stable sort order, so bugs in GDB are easier to
+ triage. This section could be slow (since we iterate over all
+ objfiles in each call to qsort_cmp), but this shouldn't happen
+ very often (GDB is already in a confused state; one hopes this
+ doesn't happen at all). If you discover that significant time is
+ spent in the loops below, do 'set complaints 100' and examine the
+ resulting complaints. */
+
+ if (objfile1 == objfile2)
+ {
+ /* Both sections came from the same objfile. We are really confused.
+ Sort on sequence order of sections within the objfile. */
+
+ const struct obj_section *osect;
+
+ ALL_OBJFILE_OSECTIONS (objfile1, osect)
+ if (osect == sect1)
+ return -1;
+ else if (osect == sect2)
+ return 1;
+
+ /* We should have found one of the sections before getting here. */
+ gdb_assert (0);
+ }
+ else
+ {
+ /* Sort on sequence number of the objfile in the chain. */
+
+ const struct objfile *objfile;
+
+ ALL_OBJFILES (objfile)
+ if (objfile == objfile1)
+ return -1;
+ else if (objfile == objfile2)
+ return 1;
+
+ /* We should have found one of the objfiles before getting here. */
+ gdb_assert (0);
+ }
+
+ }
+
+ /* Unreachable. */
+ gdb_assert (0);
+ return 0;
+}
- If SYMSFILENAME does not exist (or can't be stat'd), simply returns -1.
+/* Select "better" obj_section to keep. We prefer the one that came from
+ the real object, rather than the one from separate debuginfo.
+ Most of the time the two sections are exactly identical, but with
+ prelinking the .rel.dyn section in the real object may have different
+ size. */
- 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.
+static struct obj_section *
+preferred_obj_section (struct obj_section *a, struct obj_section *b)
+{
+ gdb_assert (obj_section_addr (a) == obj_section_addr (b));
+ gdb_assert ((a->objfile->separate_debug_objfile == b->objfile)
+ || (b->objfile->separate_debug_objfile == a->objfile));
+ gdb_assert ((a->objfile->separate_debug_objfile_backlink == b->objfile)
+ || (b->objfile->separate_debug_objfile_backlink == a->objfile));
+
+ if (a->objfile->separate_debug_objfile != NULL)
+ return a;
+ return b;
+}
+
+/* Return 1 if SECTION should be inserted into the section map.
+ We want to insert only non-overlay and non-TLS section. */
+
+static int
+insert_section_p (const struct bfd *abfd,
+ const struct bfd_section *section)
+{
+ const bfd_vma lma = bfd_section_lma (abfd, section);
- 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.
+ if (lma != 0 && lma != bfd_section_vma (abfd, section)
+ && (bfd_get_file_flags (abfd) & BFD_IN_MEMORY) == 0)
+ /* This is an overlay section. IN_MEMORY check is needed to avoid
+ discarding sections from the "system supplied DSO" (aka vdso)
+ on some Linux systems (e.g. Fedora 11). */
+ return 0;
+ if ((bfd_get_section_flags (abfd, section) & SEC_THREAD_LOCAL) != 0)
+ /* This is a TLS section. */
+ return 0;
- Otherwise, returns the open file descriptor. */
+ return 1;
+}
+
+/* Filter out overlapping sections where one section came from the real
+ objfile, and the other from a separate debuginfo file.
+ Return the size of table after redundant sections have been eliminated. */
static int
-open_existing_mapped_file (char *symsfilename, long mtime, int flags)
+filter_debuginfo_sections (struct obj_section **map, int map_size)
{
- int fd = -1;
- struct stat sbuf;
+ int i, j;
- if (stat (symsfilename, &sbuf) == 0)
+ for (i = 0, j = 0; i < map_size - 1; i++)
{
- if (sbuf.st_mtime < mtime)
+ struct obj_section *const sect1 = map[i];
+ struct obj_section *const sect2 = map[i + 1];
+ const struct objfile *const objfile1 = sect1->objfile;
+ const struct objfile *const objfile2 = sect2->objfile;
+ const CORE_ADDR sect1_addr = obj_section_addr (sect1);
+ const CORE_ADDR sect2_addr = obj_section_addr (sect2);
+
+ if (sect1_addr == sect2_addr
+ && (objfile1->separate_debug_objfile == objfile2
+ || objfile2->separate_debug_objfile == objfile1))
{
- 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);
+ map[j++] = preferred_obj_section (sect1, sect2);
+ ++i;
}
+ else
+ map[j++] = sect1;
+ }
+
+ if (i < map_size)
+ {
+ gdb_assert (i == map_size - 1);
+ map[j++] = map[i];
}
- return (fd);
+
+ /* The map should not have shrunk to less than half the original size. */
+ gdb_assert (map_size / 2 <= j);
+
+ return j;
}
-/* 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). */
+/* Filter out overlapping sections, issuing a warning if any are found.
+ Overlapping sections could really be overlay sections which we didn't
+ classify as such in insert_section_p, or we could be dealing with a
+ corrupt binary. */
static int
-open_mapped_file (char *filename, long mtime, int flags)
+filter_overlapping_sections (struct obj_section **map, int map_size)
{
- 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. */
+ int i, j;
- symsfilename = concat ("./", lbasename (filename), ".syms", (char *) NULL);
- if ((fd = open_existing_mapped_file (symsfilename, mtime, flags)) < 0)
+ for (i = 0, j = 0; i < map_size - 1; )
{
- xfree (symsfilename);
- symsfilename = concat (filename, ".syms", (char *) NULL);
- fd = open_existing_mapped_file (symsfilename, mtime, flags);
- }
+ int k;
- /* 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.
+ map[j++] = map[i];
+ for (k = i + 1; k < map_size; k++)
+ {
+ struct obj_section *const sect1 = map[i];
+ struct obj_section *const sect2 = map[k];
+ const CORE_ADDR sect1_addr = obj_section_addr (sect1);
+ const CORE_ADDR sect2_addr = obj_section_addr (sect2);
+ const CORE_ADDR sect1_endaddr = obj_section_endaddr (sect1);
- By default the file is rw for everyone, with the user's umask taking
- care of turning off the permissions the user wants off. */
+ gdb_assert (sect1_addr <= sect2_addr);
- 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)
+ if (sect1_endaddr <= sect2_addr)
+ break;
+ else
{
- printf_unfiltered (error_pre_print);
+ /* We have an overlap. Report it. */
+
+ struct objfile *const objf1 = sect1->objfile;
+ struct objfile *const objf2 = sect2->objfile;
+
+ const struct bfd *const abfd1 = objf1->obfd;
+ const struct bfd *const abfd2 = objf2->obfd;
+
+ const struct bfd_section *const bfds1 = sect1->the_bfd_section;
+ const struct bfd_section *const bfds2 = sect2->the_bfd_section;
+
+ const CORE_ADDR sect2_endaddr = obj_section_endaddr (sect2);
+
+ struct gdbarch *const gdbarch = get_objfile_arch (objf1);
+
+ complaint (&symfile_complaints,
+ _("unexpected overlap between:\n"
+ " (A) section `%s' from `%s' [%s, %s)\n"
+ " (B) section `%s' from `%s' [%s, %s).\n"
+ "Will ignore section B"),
+ bfd_section_name (abfd1, bfds1), objf1->name,
+ paddress (gdbarch, sect1_addr),
+ paddress (gdbarch, sect1_endaddr),
+ bfd_section_name (abfd2, bfds2), objf2->name,
+ paddress (gdbarch, sect2_addr),
+ paddress (gdbarch, sect2_endaddr));
}
- print_sys_errmsg (symsfilename, errno);
}
+ i = k;
}
- xfree (symsfilename);
- return (fd);
+ if (i < map_size)
+ {
+ gdb_assert (i == map_size - 1);
+ map[j++] = map[i];
+ }
+
+ return j;
}
-static void *
-map_to_file (int fd)
+
+/* Update PMAP, PMAP_SIZE with sections from all objfiles, excluding any
+ TLS, overlay and overlapping sections. */
+
+static void
+update_section_map (struct program_space *pspace,
+ struct obj_section ***pmap, int *pmap_size)
{
- void *md;
- CORE_ADDR mapto;
+ int alloc_size, map_size, i;
+ struct obj_section *s, **map;
+ struct objfile *objfile;
+
+ gdb_assert (get_objfile_pspace_data (pspace)->objfiles_changed_p != 0);
+
+ map = *pmap;
+ xfree (map);
+
+ alloc_size = 0;
+ ALL_PSPACE_OBJFILES (pspace, objfile)
+ ALL_OBJFILE_OSECTIONS (objfile, s)
+ if (insert_section_p (objfile->obfd, s->the_bfd_section))
+ alloc_size += 1;
- md = mmalloc_attach (fd, 0);
- if (md != NULL)
+ /* This happens on detach/attach (e.g. in gdb.base/attach.exp). */
+ if (alloc_size == 0)
{
- 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);
- }
- }
- }
+ *pmap = NULL;
+ *pmap_size = 0;
+ return;
}
- return (md);
-}
-#endif /* defined(USE_MMALLOC) && defined(HAVE_MMAP) */
+ map = xmalloc (alloc_size * sizeof (*map));
-/* 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. */
+ i = 0;
+ ALL_PSPACE_OBJFILES (pspace, objfile)
+ ALL_OBJFILE_OSECTIONS (objfile, s)
+ if (insert_section_p (objfile->obfd, s->the_bfd_section))
+ map[i++] = s;
-struct obj_section *
-find_pc_sect_section (CORE_ADDR pc, struct sec *section)
-{
- struct obj_section *s;
- struct objfile *objfile;
+ qsort (map, alloc_size, sizeof (*map), qsort_cmp);
+ map_size = filter_debuginfo_sections(map, alloc_size);
+ map_size = filter_overlapping_sections(map, map_size);
+
+ if (map_size < alloc_size)
+ /* Some sections were eliminated. Trim excess space. */
+ map = xrealloc (map, map_size * sizeof (*map));
+ else
+ gdb_assert (alloc_size == map_size);
+
+ *pmap = map;
+ *pmap_size = map_size;
+}
- ALL_OBJSECTIONS (objfile, s)
- if ((section == 0 || section == s->the_bfd_section) &&
- s->addr <= pc && pc < s->endaddr)
- return (s);
+/* Bsearch comparison function. */
- return (NULL);
+static int
+bsearch_cmp (const void *key, const void *elt)
+{
+ const CORE_ADDR pc = *(CORE_ADDR *) key;
+ const struct obj_section *section = *(const struct obj_section **) elt;
+
+ if (pc < obj_section_addr (section))
+ return -1;
+ if (pc < obj_section_endaddr (section))
+ return 0;
+ return 1;
}
-/* Returns a section whose range includes PC or NULL if none found.
- Backward compatibility, no section. */
+/* Returns a section whose range includes PC or NULL if none found. */
struct obj_section *
find_pc_section (CORE_ADDR pc)
{
- return find_pc_sect_section (pc, find_pc_mapped_section (pc));
+ struct objfile_pspace_info *pspace_info;
+ struct obj_section *s, **sp;
+
+ /* Check for mapped overlay section first. */
+ s = find_pc_mapped_section (pc);
+ if (s)
+ return s;
+
+ pspace_info = get_objfile_pspace_data (current_program_space);
+ if (pspace_info->objfiles_changed_p != 0)
+ {
+ update_section_map (current_program_space,
+ &pspace_info->sections,
+ &pspace_info->num_sections);
+
+ /* Don't need updates to section map until objfiles are added,
+ removed or relocated. */
+ pspace_info->objfiles_changed_p = 0;
+ }
+
+ /* The C standard (ISO/IEC 9899:TC2) requires the BASE argument to
+ bsearch be non-NULL. */
+ if (pspace_info->sections == NULL)
+ {
+ gdb_assert (pspace_info->num_sections == 0);
+ return NULL;
+ }
+
+ sp = (struct obj_section **) bsearch (&pc,
+ pspace_info->sections,
+ pspace_info->num_sections,
+ sizeof (*pspace_info->sections),
+ bsearch_cmp);
+ if (sp != NULL)
+ return *sp;
+ return NULL;
}
@@ -1077,24 +1210,185 @@ in_plt_section (CORE_ADDR pc, char *name)
retval = (s != NULL
&& s->the_bfd_section->name != NULL
- && STREQ (s->the_bfd_section->name, ".plt"));
+ && strcmp (s->the_bfd_section->name, ".plt") == 0);
return (retval);
}
+
-/* Return nonzero if NAME is in the import list of OBJFILE. Else
- return zero. */
+/* Keep a registry of per-objfile data-pointers required by other GDB
+ modules. */
-int
-is_in_import_list (char *name, struct objfile *objfile)
+struct objfile_data
{
- register int i;
+ unsigned index;
+ void (*save) (struct objfile *, void *);
+ void (*free) (struct objfile *, void *);
+};
- if (!objfile || !name || !*name)
- return 0;
+struct objfile_data_registration
+{
+ struct objfile_data *data;
+ struct objfile_data_registration *next;
+};
+
+struct objfile_data_registry
+{
+ struct objfile_data_registration *registrations;
+ unsigned num_registrations;
+};
- for (i = 0; i < objfile->import_list_size; i++)
- if (objfile->import_list[i] && STREQ (name, objfile->import_list[i]))
- return 1;
- return 0;
+static struct objfile_data_registry objfile_data_registry = { NULL, 0 };
+
+const struct objfile_data *
+register_objfile_data_with_cleanup (void (*save) (struct objfile *, void *),
+ void (*free) (struct objfile *, void *))
+{
+ struct objfile_data_registration **curr;
+
+ /* Append new registration. */
+ for (curr = &objfile_data_registry.registrations;
+ *curr != NULL; curr = &(*curr)->next);
+
+ *curr = XMALLOC (struct objfile_data_registration);
+ (*curr)->next = NULL;
+ (*curr)->data = XMALLOC (struct objfile_data);
+ (*curr)->data->index = objfile_data_registry.num_registrations++;
+ (*curr)->data->save = save;
+ (*curr)->data->free = free;
+
+ return (*curr)->data;
+}
+
+const struct objfile_data *
+register_objfile_data (void)
+{
+ return register_objfile_data_with_cleanup (NULL, NULL);
+}
+
+static void
+objfile_alloc_data (struct objfile *objfile)
+{
+ gdb_assert (objfile->data == NULL);
+ objfile->num_data = objfile_data_registry.num_registrations;
+ objfile->data = XCALLOC (objfile->num_data, void *);
+}
+
+static void
+objfile_free_data (struct objfile *objfile)
+{
+ gdb_assert (objfile->data != NULL);
+ clear_objfile_data (objfile);
+ xfree (objfile->data);
+ objfile->data = NULL;
+}
+
+void
+clear_objfile_data (struct objfile *objfile)
+{
+ struct objfile_data_registration *registration;
+ int i;
+
+ gdb_assert (objfile->data != NULL);
+
+ /* Process all the save handlers. */
+
+ for (registration = objfile_data_registry.registrations, i = 0;
+ i < objfile->num_data;
+ registration = registration->next, i++)
+ if (objfile->data[i] != NULL && registration->data->save != NULL)
+ registration->data->save (objfile, objfile->data[i]);
+
+ /* Now process all the free handlers. */
+
+ for (registration = objfile_data_registry.registrations, i = 0;
+ i < objfile->num_data;
+ registration = registration->next, i++)
+ if (objfile->data[i] != NULL && registration->data->free != NULL)
+ registration->data->free (objfile, objfile->data[i]);
+
+ memset (objfile->data, 0, objfile->num_data * sizeof (void *));
+}
+
+void
+set_objfile_data (struct objfile *objfile, const struct objfile_data *data,
+ void *value)
+{
+ gdb_assert (data->index < objfile->num_data);
+ objfile->data[data->index] = value;
}
+void *
+objfile_data (struct objfile *objfile, const struct objfile_data *data)
+{
+ gdb_assert (data->index < objfile->num_data);
+ return objfile->data[data->index];
+}
+
+/* Set objfiles_changed_p so section map will be rebuilt next time it
+ is used. Called by reread_symbols. */
+
+void
+objfiles_changed (void)
+{
+ /* Rebuild section map next time we need it. */
+ get_objfile_pspace_data (current_program_space)->objfiles_changed_p = 1;
+}
+
+/* Add reference to ABFD. Returns ABFD. */
+struct bfd *
+gdb_bfd_ref (struct bfd *abfd)
+{
+ int *p_refcount = bfd_usrdata (abfd);
+
+ if (p_refcount != NULL)
+ {
+ *p_refcount += 1;
+ return abfd;
+ }
+
+ p_refcount = xmalloc (sizeof (*p_refcount));
+ *p_refcount = 1;
+ bfd_usrdata (abfd) = p_refcount;
+
+ return abfd;
+}
+
+/* Unreference and possibly close ABFD. */
+void
+gdb_bfd_unref (struct bfd *abfd)
+{
+ int *p_refcount;
+ char *name;
+
+ if (abfd == NULL)
+ return;
+
+ p_refcount = bfd_usrdata (abfd);
+
+ /* Valid range for p_refcount: a pointer to int counter, which has a
+ value of 1 (single owner) or 2 (shared). */
+ gdb_assert (*p_refcount == 1 || *p_refcount == 2);
+
+ *p_refcount -= 1;
+ if (*p_refcount > 0)
+ return;
+
+ xfree (p_refcount);
+ bfd_usrdata (abfd) = NULL; /* Paranoia. */
+
+ name = bfd_get_filename (abfd);
+ if (!bfd_close (abfd))
+ warning (_("cannot close \"%s\": %s"),
+ name, bfd_errmsg (bfd_get_error ()));
+ xfree (name);
+}
+
+/* Provide a prototype to silence -Wmissing-prototypes. */
+extern initialize_file_ftype _initialize_objfiles;
+
+void
+_initialize_objfiles (void)
+{
+ objfiles_pspace_data
+ = register_program_space_data_with_cleanup (objfiles_pspace_data_cleanup);
+}