/* Handle shared libraries for GDB, the GNU Debugger.
- Copyright (C) 1990-2020 Free Software Foundation, Inc.
+ Copyright (C) 1990-2021 Free Software Foundation, Inc.
This file is part of GDB.
may need to glue them with a directory separator. Cases to
consider:
- | sysroot | separator | in_pathname |
- |-----------------+-----------+----------------|
- | /some/dir | / | c:/foo/bar.dll |
- | /some/dir | | /foo/bar.dll |
- | target: | | c:/foo/bar.dll |
- | target: | | /foo/bar.dll |
- | target:some/dir | / | c:/foo/bar.dll |
- | target:some/dir | | /foo/bar.dll |
+ | sysroot | separator | in_pathname |
+ |-----------------+-----------+----------------|
+ | /some/dir | / | c:/foo/bar.dll |
+ | /some/dir | | /foo/bar.dll |
+ | target: | | c:/foo/bar.dll |
+ | target: | | /foo/bar.dll |
+ | target:some/dir | / | c:/foo/bar.dll |
+ | target:some/dir | | /foo/bar.dll |
IOW, we don't need to add a separator if IN_PATHNAME already
has one, or when the sysroot is exactly "target:".
solib_map_sections (struct so_list *so)
{
const struct target_so_ops *ops = solib_ops (target_gdbarch ());
- struct target_section *p;
gdb::unique_xmalloc_ptr<char> filename (tilde_expand (so->so_name));
gdb_bfd_ref_ptr abfd (ops->bfd_open (filename.get ()));
error (_("Shared library file name is too long."));
strcpy (so->so_name, bfd_get_filename (so->abfd));
- if (build_section_table (so->abfd, &so->sections, &so->sections_end))
- {
- error (_("Can't find the file sections in `%s': %s"),
- bfd_get_filename (so->abfd), bfd_errmsg (bfd_get_error ()));
- }
+ if (so->sections == nullptr)
+ so->sections = new target_section_table;
+ *so->sections = build_section_table (so->abfd);
- for (p = so->sections; p < so->sections_end; p++)
+ for (target_section &p : *so->sections)
{
/* Relocate the section binding addresses as recorded in the shared
- object's file by the base address to which the object was actually
- mapped. */
- ops->relocate_section_addresses (so, p);
+ object's file by the base address to which the object was actually
+ mapped. */
+ ops->relocate_section_addresses (so, &p);
/* If the target didn't provide information about the address
range of the shared object, assume we want the location of
the .text section. */
if (so->addr_low == 0 && so->addr_high == 0
- && strcmp (p->the_bfd_section->name, ".text") == 0)
+ && strcmp (p.the_bfd_section->name, ".text") == 0)
{
- so->addr_low = p->addr;
- so->addr_high = p->endaddr;
+ so->addr_low = p.addr;
+ so->addr_high = p.endaddr;
}
}
section tables. Do this immediately after mapping the object so
that later nodes in the list can query this object, as is needed
in solib-osf.c. */
- add_target_sections (so, so->sections, so->sections_end);
+ current_program_space->add_target_sections (so, *so->sections);
return 1;
}
{
const struct target_so_ops *ops = solib_ops (target_gdbarch ());
- if (so->sections)
- {
- xfree (so->sections);
- so->sections = so->sections_end = NULL;
- }
+ delete so->sections;
+ so->sections = NULL;
gdb_bfd_unref (so->abfd);
so->abfd = NULL;
}
-/* Return address of first so_list entry in master shared object list. */
-struct so_list *
-master_so_list (void)
-{
- return so_list_head;
-}
-
/* Read in symbols for shared object SO. If SYMFILE_VERBOSE is set in FLAGS,
be chatty about it. Return true if any symbols were actually loaded. */
if (so->objfile == NULL)
{
section_addr_info sap
- = build_section_addr_info_from_section_table (so->sections,
- so->sections_end);
+ = build_section_addr_info_from_section_table (*so->sections);
so->objfile = symbol_file_add_from_bfd (so->abfd, so->so_name,
flags, &sap,
OBJF_SHARED, NULL);
return false;
}
-/* Return true if KNOWN->objfile is used by any other so_list object in the
- SO_LIST_HEAD list. Return false otherwise. */
+/* Return true if KNOWN->objfile is used by any other so_list object
+ in the list of shared libraries. Return false otherwise. */
static bool
solib_used (const struct so_list *const known)
{
- const struct so_list *pivot;
-
- for (pivot = so_list_head; pivot != NULL; pivot = pivot->next)
+ for (const struct so_list *pivot : current_program_space->solibs ())
if (pivot != known && pivot->objfile == known->objfile)
return true;
return false;
/* We can reach here due to changing solib-search-path or the
sysroot, before having any inferior. */
- if (target_has_execution && inferior_ptid != null_ptid)
+ if (target_has_execution () && inferior_ptid != null_ptid)
{
struct inferior *inf = current_inferior ();
/* If we are attaching to a running process for which we
have not opened a symbol file, we may be able to get its
symbols now! */
- if (inf->attach_flag && symfile_objfile == NULL)
+ if (inf->attach_flag
+ && current_program_space->symfile_object_file == NULL)
{
try
{
the time we're done walking GDB's list, the inferior's list
contains only the new shared objects, which we then add. */
- gdb = so_list_head;
- gdb_link = &so_list_head;
+ gdb = current_program_space->so_list;
+ gdb_link = ¤t_program_space->so_list;
while (gdb)
{
struct so_list *i = inferior;
}
/* If the shared object appears on the inferior's list too, then
- it's still loaded, so we don't need to do anything. Delete
- it from the inferior's list, and leave it on GDB's list. */
+ it's still loaded, so we don't need to do anything. Delete
+ it from the inferior's list, and leave it on GDB's list. */
if (i)
{
*i_link = i->next;
/* Some targets' section tables might be referring to
sections from so->abfd; remove them. */
- remove_target_sections (gdb);
+ current_program_space->remove_target_sections (gdb);
free_so (gdb);
gdb = *gdb_link;
Uses a fairly simplistic heuristic approach where we check
the file name against "/libpthread". This can lead to false
- positives, but this should be good enough in practice. */
+ positives, but this should be good enough in practice.
+
+ As of glibc-2.34, functions formerly residing in libpthread have
+ been moved to libc, so "/libc." needs to be checked too. (Matching
+ the "." will avoid matching libraries such as libcrypt.) */
bool
libpthread_name_p (const char *name)
{
- return (strstr (name, "/libpthread") != NULL);
+ return (strstr (name, "/libpthread") != NULL
+ || strstr (name, "/libc.") != NULL );
}
/* Return non-zero if SO is the libpthread shared library. */
void
solib_add (const char *pattern, int from_tty, int readsyms)
{
- struct so_list *gdb;
-
if (print_symbol_loading_p (from_tty, 0, 0))
{
if (pattern != NULL)
symfile_add_flags add_flags = SYMFILE_DEFER_BP_RESET;
if (from_tty)
- add_flags |= SYMFILE_VERBOSE;
+ add_flags |= SYMFILE_VERBOSE;
- for (gdb = so_list_head; gdb; gdb = gdb->next)
+ for (struct so_list *gdb : current_program_space->solibs ())
if (! pattern || re_exec (gdb->so_name))
{
- /* Normally, we would read the symbols from that library
- only if READSYMS is set. However, we're making a small
- exception for the pthread library, because we sometimes
- need the library symbols to be loaded in order to provide
- thread support (x86-linux for instance). */
- const int add_this_solib =
- (readsyms || libpthread_solib_p (gdb));
+ /* Normally, we would read the symbols from that library
+ only if READSYMS is set. However, we're making a small
+ exception for the pthread library, because we sometimes
+ need the library symbols to be loaded in order to provide
+ thread support (x86-linux for instance). */
+ const int add_this_solib =
+ (readsyms || libpthread_solib_p (gdb));
any_matches = true;
if (add_this_solib)
static void
info_sharedlibrary_command (const char *pattern, int from_tty)
{
- struct so_list *so = NULL; /* link map state variable */
bool so_missing_debug_info = false;
int addr_width;
int nr_libs;
/* ui_out_emit_table table_emitter needs to know the number of rows,
so we need to make two passes over the libs. */
- for (nr_libs = 0, so = so_list_head; so; so = so->next)
+ nr_libs = 0;
+ for (struct so_list *so : current_program_space->solibs ())
{
if (so->so_name[0])
{
uiout->table_body ();
- ALL_SO_LIBS (so)
+ for (struct so_list *so : current_program_space->solibs ())
{
if (! so->so_name[0])
continue;
solib_contains_address_p (const struct so_list *const solib,
CORE_ADDR address)
{
- struct target_section *p;
+ if (solib->sections == nullptr)
+ return false;
- for (p = solib->sections; p < solib->sections_end; p++)
- if (p->addr <= address && address < p->endaddr)
+ for (target_section &p : *solib->sections)
+ if (p.addr <= address && address < p.endaddr)
return true;
return false;
disable_breakpoints_in_shlibs ();
- while (so_list_head)
+ while (current_program_space->so_list)
{
- struct so_list *so = so_list_head;
+ struct so_list *so = current_program_space->so_list;
- so_list_head = so->next;
+ current_program_space->so_list = so->next;
gdb::observers::solib_unloaded.notify (so);
- remove_target_sections (so);
+ current_program_space->remove_target_sections (so);
free_so (so);
}
if (ops->handle_event != NULL)
ops->handle_event ();
- clear_program_space_solib_cache (current_inferior ()->pspace);
+ current_inferior ()->pspace->clear_solib_cache ();
/* Check for any newly added shared libraries if we're supposed to
be adding them automatically. Switch terminal for any messages
static void
reload_shared_libraries_1 (int from_tty)
{
- struct so_list *so;
-
if (print_symbol_loading_p (from_tty, 0, 0))
printf_unfiltered (_("Loading symbols for shared libraries.\n"));
- for (so = so_list_head; so != NULL; so = so->next)
+ for (struct so_list *so : current_program_space->solibs ())
{
const char *found_pathname = NULL;
bool was_loaded = so->symbols_loaded != 0;
if (so->objfile && ! (so->objfile->flags & OBJF_USERLOADED)
&& !solib_used (so))
so->objfile->unlink ();
- remove_target_sections (so);
+ current_program_space->remove_target_sections (so);
clear_so (so);
}
Absent this call, if we've just connected to a target and set
solib-absolute-prefix or solib-search-path, we'll lose all information
about ld.so. */
- if (target_has_execution)
+ if (target_has_execution ())
{
/* Reset or free private data structures not associated with
so_list entries. */
symaddr = sym->value;
/* Some ELF targets fiddle with addresses of symbols they
- consider special. They use minimal symbols to do that
- and this is needed for correct breakpoint placement,
- but we do not have full data here to build a complete
- minimal symbol, so just set the address and let the
- targets cope with that. */
+ consider special. They use minimal symbols to do that
+ and this is needed for correct breakpoint placement,
+ but we do not have full data here to build a complete
+ minimal symbol, so just set the address and let the
+ targets cope with that. */
if (bfd_get_flavour (abfd) == bfd_target_elf_flavour
&& gdbarch_elf_make_msymbol_special_p (gdbarch))
{
return symaddr;
}
-/* SO_LIST_HEAD may contain user-loaded object files that can be removed
- out-of-band by the user. So upon notification of free_objfile remove
- all references to any user-loaded file that is about to be freed. */
+/* The shared library list may contain user-loaded object files that
+ can be removed out-of-band by the user. So upon notification of
+ free_objfile remove all references to any user-loaded file that is
+ about to be freed. */
static void
remove_user_added_objfile (struct objfile *objfile)
{
- struct so_list *so;
-
if (objfile != 0 && objfile->flags & OBJF_USERLOADED)
{
- for (so = so_list_head; so != NULL; so = so->next)
+ for (struct so_list *so : current_program_space->solibs ())
if (so->objfile == objfile)
so->objfile = NULL;
}
}
+void _initialize_solib ();
void
-_initialize_solib (void)
+_initialize_solib ()
{
solib_data = gdbarch_data_register_pre_init (solib_init);
- gdb::observers::free_objfile.attach (remove_user_added_objfile);
+ gdb::observers::free_objfile.attach (remove_user_added_objfile,
+ "solib");
+ gdb::observers::inferior_execd.attach ([] (inferior *inf)
+ {
+ solib_create_inferior_hook (0);
+ }, "solib");
add_com ("sharedlibrary", class_files, sharedlibrary_command,
_("Load shared object library symbols for files matching REGEXP."));
- add_info ("sharedlibrary", info_sharedlibrary_command,
- _("Status of loaded shared object libraries."));
- add_info_alias ("dll", "sharedlibrary", 1);
+ cmd_list_element *info_sharedlibrary_cmd
+ = add_info ("sharedlibrary", info_sharedlibrary_command,
+ _("Status of loaded shared object libraries."));
+ add_info_alias ("dll", info_sharedlibrary_cmd, 1);
add_com ("nosharedlibrary", class_files, no_shared_libraries,
_("Unload all shared object library symbols."));
show_auto_solib_add,
&setlist, &showlist);
- add_setshow_optional_filename_cmd ("sysroot", class_support,
- &gdb_sysroot, _("\
+ set_show_commands sysroot_cmds
+ = add_setshow_optional_filename_cmd ("sysroot", class_support,
+ &gdb_sysroot, _("\
Set an alternate system root."), _("\
Show the current system root."), _("\
The system root is used to load absolute shared library symbol files.\n\
For other (relative) files, you can add directories using\n\
`set solib-search-path'."),
- gdb_sysroot_changed,
- NULL,
- &setlist, &showlist);
+ gdb_sysroot_changed,
+ NULL,
+ &setlist, &showlist);
- add_alias_cmd ("solib-absolute-prefix", "sysroot", class_support, 0,
+ add_alias_cmd ("solib-absolute-prefix", sysroot_cmds.set, class_support, 0,
&setlist);
- add_alias_cmd ("solib-absolute-prefix", "sysroot", class_support, 0,
+ add_alias_cmd ("solib-absolute-prefix", sysroot_cmds.show, class_support, 0,
&showlist);
add_setshow_optional_filename_cmd ("solib-search-path", class_support,
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