/* Handle shared libraries for GDB, the GNU Debugger.
- Copyright (C) 1990-2017 Free Software Foundation, Inc.
+ Copyright (C) 1990-2019 Free Software Foundation, Inc.
This file is part of GDB.
#include "frame.h"
#include "gdb_regex.h"
#include "inferior.h"
-#include "environ.h"
+#include "gdbsupport/environ.h"
#include "language.h"
#include "gdbcmd.h"
#include "completer.h"
#include "filenames.h" /* for DOSish file names */
#include "exec.h"
#include "solist.h"
-#include "observer.h"
-#include "readline/readline.h"
+#include "observable.h"
+#include "readline/tilde.h"
#include "remote.h"
#include "solib.h"
#include "interps.h"
#include "filesystem.h"
#include "gdb_bfd.h"
-#include "filestuff.h"
+#include "gdbsupport/filestuff.h"
+#include "source.h"
+#include "cli/cli-style.h"
/* Architecture-specific operations. */
# define DOS_BASED_FILE_SYSTEM 0
#endif
-/* Return the full pathname of a binary file (the main executable
- or a shared library file), or NULL if not found. The returned
- pathname is malloc'ed and must be freed by the caller. If FD
- is non-NULL, *FD is set to either -1 or an open file handle for
- the binary file.
+/* Return the full pathname of a binary file (the main executable or a
+ shared library file), or NULL if not found. If FD is non-NULL, *FD
+ is set to either -1 or an open file handle for the binary file.
Global variable GDB_SYSROOT is used as a prefix directory
to search for binary files if they have an absolute path.
* If IS_SOLIB is non-zero:
* Look in inferior's $LD_LIBRARY_PATH.
*
- * The last check avoids doing this search when targetting remote
+ * The last check avoids doing this search when targeting remote
* machines since a sysroot will almost always be set.
*/
-static char *
+static gdb::unique_xmalloc_ptr<char>
solib_find_1 (const char *in_pathname, int *fd, int is_solib)
{
const struct target_so_ops *ops = solib_ops (target_gdbarch ());
int found_file = -1;
- char *temp_pathname = NULL;
+ gdb::unique_xmalloc_ptr<char> temp_pathname;
const char *fskind = effective_target_file_system_kind ();
- struct cleanup *old_chain = make_cleanup (null_cleanup, NULL);
- char *sysroot = gdb_sysroot;
+ const char *sysroot = gdb_sysroot;
int prefix_len, orig_prefix_len;
/* If the absolute prefix starts with "target:" but the filesystem
while (prefix_len > 0 && IS_DIR_SEPARATOR (sysroot[prefix_len - 1]))
prefix_len--;
+ std::string sysroot_holder;
if (prefix_len == 0)
sysroot = NULL;
else if (prefix_len != orig_prefix_len)
{
- sysroot = savestring (sysroot, prefix_len);
- make_cleanup (xfree, sysroot);
+ sysroot_holder = std::string (sysroot, prefix_len);
+ sysroot = sysroot_holder.c_str ();
}
/* If we're on a non-DOS-based system, backslashes won't be
*/
if (!IS_TARGET_ABSOLUTE_PATH (fskind, in_pathname) || sysroot == NULL)
- temp_pathname = xstrdup (in_pathname);
+ temp_pathname.reset (xstrdup (in_pathname));
else
{
int need_dir_separator;
| target:some/dir | | /foo/bar.dll |
IOW, we don't need to add a separator if IN_PATHNAME already
- has one, or when the the sysroot is exactly "target:".
+ has one, or when the sysroot is exactly "target:".
There's no need to check for drive spec explicitly, as we only
get here if IN_PATHNAME is considered an absolute path. */
need_dir_separator = !(IS_DIR_SEPARATOR (in_pathname[0])
|| strcmp (TARGET_SYSROOT_PREFIX, sysroot) == 0);
/* Cat the prefixed pathname together. */
- temp_pathname = concat (sysroot,
- need_dir_separator ? SLASH_STRING : "",
- in_pathname, (char *) NULL);
+ temp_pathname.reset (concat (sysroot,
+ need_dir_separator ? SLASH_STRING : "",
+ in_pathname, (char *) NULL));
}
/* Handle files to be accessed via the target. */
- if (is_target_filename (temp_pathname))
+ if (is_target_filename (temp_pathname.get ()))
{
if (fd != NULL)
*fd = -1;
- do_cleanups (old_chain);
return temp_pathname;
}
/* Now see if we can open it. */
- found_file = gdb_open_cloexec (temp_pathname, O_RDONLY | O_BINARY, 0);
- if (found_file < 0)
- xfree (temp_pathname);
+ found_file = gdb_open_cloexec (temp_pathname.get (), O_RDONLY | O_BINARY, 0);
/* If the search in gdb_sysroot failed, and the path name has a
drive spec (e.g, c:/foo), try stripping ':' from the drive spec,
&& HAS_TARGET_DRIVE_SPEC (fskind, in_pathname))
{
int need_dir_separator = !IS_DIR_SEPARATOR (in_pathname[2]);
- char *drive = savestring (in_pathname, 1);
+ char drive[2] = { in_pathname[0], '\0' };
- temp_pathname = concat (sysroot,
- SLASH_STRING,
- drive,
- need_dir_separator ? SLASH_STRING : "",
- in_pathname + 2, (char *) NULL);
- xfree (drive);
+ temp_pathname.reset (concat (sysroot,
+ SLASH_STRING,
+ drive,
+ need_dir_separator ? SLASH_STRING : "",
+ in_pathname + 2, (char *) NULL));
- found_file = gdb_open_cloexec (temp_pathname, O_RDONLY | O_BINARY, 0);
+ found_file = gdb_open_cloexec (temp_pathname.get (),
+ O_RDONLY | O_BINARY, 0);
if (found_file < 0)
{
- xfree (temp_pathname);
-
/* If the search in gdb_sysroot still failed, try fully
stripping the drive spec, and trying once more in the
sysroot before giving up.
c:/foo/bar.dll ==> /sysroot/foo/bar.dll. */
- temp_pathname = concat (sysroot,
- need_dir_separator ? SLASH_STRING : "",
- in_pathname + 2, (char *) NULL);
+ temp_pathname.reset (concat (sysroot,
+ need_dir_separator ? SLASH_STRING : "",
+ in_pathname + 2, (char *) NULL));
- found_file = gdb_open_cloexec (temp_pathname, O_RDONLY | O_BINARY, 0);
- if (found_file < 0)
- xfree (temp_pathname);
+ found_file = gdb_open_cloexec (temp_pathname.get (),
+ O_RDONLY | O_BINARY, 0);
}
}
- do_cleanups (old_chain);
-
/* We try to find the library in various ways. After each attempt,
either found_file >= 0 and temp_pathname is a malloc'd string, or
found_file < 0 and temp_pathname does not point to storage that
needs to be freed. */
if (found_file < 0)
- temp_pathname = NULL;
+ temp_pathname.reset (NULL);
/* If the search in gdb_sysroot failed, and the path name is
absolute at this point, make it relative. (openp will try and open the
}
/* Return the full pathname of the main executable, or NULL if not
- found. The returned pathname is malloc'ed and must be freed by
- the caller. If FD is non-NULL, *FD is set to either -1 or an open
- file handle for the main executable. */
+ found. If FD is non-NULL, *FD is set to either -1 or an open file
+ handle for the main executable. */
-char *
+gdb::unique_xmalloc_ptr<char>
exec_file_find (const char *in_pathname, int *fd)
{
- char *result;
+ gdb::unique_xmalloc_ptr<char> result;
const char *fskind = effective_target_file_system_kind ();
if (in_pathname == NULL)
filename. Not much more we can do...) */
if (!source_full_path_of (in_pathname, &result))
- result = xstrdup (in_pathname);
+ result.reset (xstrdup (in_pathname));
if (fd != NULL)
*fd = -1;
}
}
/* Return the full pathname of a shared library file, or NULL if not
- found. The returned pathname is malloc'ed and must be freed by
- the caller. If FD is non-NULL, *FD is set to either -1 or an open
- file handle for the shared library.
+ found. If FD is non-NULL, *FD is set to either -1 or an open file
+ handle for the shared library.
The search algorithm used is described in solib_find_1's comment
above. */
-char *
+gdb::unique_xmalloc_ptr<char>
solib_find (const char *in_pathname, int *fd)
{
const char *solib_symbols_extension
it is used as file handle to open the file. Throws an error if the file
could not be opened. Handles both local and remote file access.
- PATHNAME must be malloc'ed by the caller. It will be freed by this
- function. If unsuccessful, the FD will be closed (unless FD was
- -1). */
+ If unsuccessful, the FD will be closed (unless FD was -1). */
gdb_bfd_ref_ptr
-solib_bfd_fopen (char *pathname, int fd)
+solib_bfd_fopen (const char *pathname, int fd)
{
gdb_bfd_ref_ptr abfd (gdb_bfd_open (pathname, gnutarget, fd));
if (abfd == NULL)
{
- make_cleanup (xfree, pathname);
+ /* Arrange to free PATHNAME when the error is thrown. */
error (_("Could not open `%s' as an executable file: %s"),
pathname, bfd_errmsg (bfd_get_error ()));
}
- xfree (pathname);
-
return abfd;
}
/* Find shared library PATHNAME and open a BFD for it. */
gdb_bfd_ref_ptr
-solib_bfd_open (char *pathname)
+solib_bfd_open (const char *pathname)
{
- char *found_pathname;
int found_file;
const struct bfd_arch_info *b;
/* Search for shared library file. */
- found_pathname = solib_find (pathname, &found_file);
+ gdb::unique_xmalloc_ptr<char> found_pathname
+ = solib_find (pathname, &found_file);
if (found_pathname == NULL)
{
/* Return failure if the file could not be found, so that we can
}
/* Open bfd for shared library. */
- gdb_bfd_ref_ptr abfd (solib_bfd_fopen (found_pathname, found_file));
+ gdb_bfd_ref_ptr abfd (solib_bfd_fopen (found_pathname.get (), found_file));
/* Check bfd format. */
if (!bfd_check_format (abfd.get (), bfd_object))
error (_("`%s': not in executable format: %s"),
- bfd_get_filename (abfd), bfd_errmsg (bfd_get_error ()));
+ bfd_get_filename (abfd.get ()), bfd_errmsg (bfd_get_error ()));
/* Check bfd arch. */
b = gdbarch_bfd_arch_info (target_gdbarch ());
if (!b->compatible (b, bfd_get_arch_info (abfd.get ())))
warning (_("`%s': Shared library architecture %s is not compatible "
- "with target architecture %s."), bfd_get_filename (abfd),
- bfd_get_arch_info (abfd.get ())->printable_name,
+ "with target architecture %s."), bfd_get_filename (abfd.get ()),
+ bfd_get_arch_info (abfd.get ())->printable_name,
b->printable_name);
return abfd;
flags |= current_inferior ()->symfile_flags;
- TRY
+ try
{
- struct section_addr_info *sap;
-
/* Have we already loaded this shared object? */
- ALL_OBJFILES (so->objfile)
+ so->objfile = nullptr;
+ for (objfile *objfile : current_program_space->objfiles ())
{
- if (filename_cmp (objfile_name (so->objfile), so->so_name) == 0
- && so->objfile->addr_low == so->addr_low)
- break;
+ if (filename_cmp (objfile_name (objfile), so->so_name) == 0
+ && objfile->addr_low == so->addr_low)
+ {
+ so->objfile = objfile;
+ break;
+ }
}
if (so->objfile == NULL)
{
- sap = build_section_addr_info_from_section_table (so->sections,
- so->sections_end);
+ section_addr_info sap
+ = build_section_addr_info_from_section_table (so->sections,
+ so->sections_end);
so->objfile = symbol_file_add_from_bfd (so->abfd, so->so_name,
- flags, sap, OBJF_SHARED,
- NULL);
+ flags, &sap,
+ OBJF_SHARED, NULL);
so->objfile->addr_low = so->addr_low;
- free_section_addr_info (sap);
}
so->symbols_loaded = 1;
}
- CATCH (e, RETURN_MASK_ERROR)
+ catch (const gdb_exception_error &e)
{
exception_fprintf (gdb_stderr, e, _("Error while reading shared"
" library symbols for %s:\n"),
so->so_name);
}
- END_CATCH
return 1;
}
/* We can reach here due to changing solib-search-path or the
sysroot, before having any inferior. */
- if (target_has_execution && !ptid_equal (inferior_ptid, null_ptid))
+ if (target_has_execution && inferior_ptid != null_ptid)
{
struct inferior *inf = current_inferior ();
symbols now! */
if (inf->attach_flag && symfile_objfile == NULL)
{
- TRY
+ try
{
ops->open_symbol_file_object (from_tty);
}
- CATCH (ex, RETURN_MASK_ALL)
+ catch (const gdb_exception &ex)
{
exception_fprintf (gdb_stderr, ex,
"Error reading attached "
"process's symbol file.\n");
}
- END_CATCH
}
}
{
/* Notify any observer that the shared object has been
unloaded before we remove it from GDB's tables. */
- observer_notify_solib_unloaded (gdb);
+ gdb::observers::solib_unloaded.notify (gdb);
- VEC_safe_push (char_ptr, current_program_space->deleted_solibs,
- xstrdup (gdb->so_name));
+ current_program_space->deleted_solibs.push_back (gdb->so_name);
*gdb_link = gdb->next;
/* Unless the user loaded it explicitly, free SO's objfile. */
if (gdb->objfile && ! (gdb->objfile->flags & OBJF_USERLOADED)
&& !solib_used (gdb))
- free_objfile (gdb->objfile);
+ delete gdb->objfile;
/* Some targets' section tables might be referring to
sections from so->abfd; remove them. */
{
i->pspace = current_program_space;
- VEC_safe_push (so_list_ptr, current_program_space->added_solibs, i);
+ current_program_space->added_solibs.push_back (i);
- TRY
+ try
{
/* Fill in the rest of the `struct so_list' node. */
if (!solib_map_sections (i))
}
}
- CATCH (e, RETURN_MASK_ERROR)
+ catch (const gdb_exception_error &e)
{
exception_fprintf (gdb_stderr, e,
_("Error while mapping shared "
"library sections:\n"));
}
- END_CATCH
/* Notify any observer that the shared object has been
loaded now that we've added it to GDB's tables. */
- observer_notify_solib_loaded (i);
+ gdb::observers::solib_loaded.notify (i);
}
/* If a library was not found, issue an appropriate warning
all. */
static void
-info_sharedlibrary_command (char *pattern, int from_tty)
+info_sharedlibrary_command (const char *pattern, int from_tty)
{
struct so_list *so = NULL; /* link map state variable */
int so_missing_debug_info = 0;
uiout->field_skip ("to");
}
- if (! interp_ui_out (top_level_interpreter ())->is_mi_like_p ()
+ if (! top_level_interpreter ()->interp_ui_out ()->is_mi_like_p ()
&& so->symbols_loaded
&& !objfile_has_symbols (so->objfile))
{
else
uiout->field_string ("syms-read", so->symbols_loaded ? "Yes" : "No");
- uiout->field_string ("name", so->so_name);
+ uiout->field_string ("name", so->so_name, file_name_style.style ());
uiout->text ("\n");
}
struct so_list *so = so_list_head;
so_list_head = so->next;
- observer_notify_solib_unloaded (so);
+ gdb::observers::solib_unloaded.notify (so);
remove_target_sections (so);
free_so (so);
}
/* Implements the "sharedlibrary" command. */
static void
-sharedlibrary_command (char *args, int from_tty)
+sharedlibrary_command (const char *args, int from_tty)
{
dont_repeat ();
solib_add (args, from_tty, 1);
are not discarded. Also called from remote.c. */
void
-no_shared_libraries (char *ignored, int from_tty)
+no_shared_libraries (const char *ignored, int from_tty)
{
/* The order of the two routines below is important: clear_solib notifies
the solib_unloaded observers, and some of these observers might need
for (so = so_list_head; so != NULL; so = so->next)
{
- char *found_pathname = NULL;
+ const char *found_pathname = NULL;
int was_loaded = so->symbols_loaded;
symfile_add_flags add_flags = SYMFILE_DEFER_BP_RESET;
{
if (so->objfile && ! (so->objfile->flags & OBJF_USERLOADED)
&& !solib_used (so))
- free_objfile (so->objfile);
+ delete so->objfile;
remove_target_sections (so);
clear_so (so);
}
{
int got_error = 0;
- TRY
+ try
{
solib_map_sections (so);
}
- CATCH (e, RETURN_MASK_ERROR)
+ catch (const gdb_exception_error &e)
{
exception_fprintf (gdb_stderr, e,
_("Error while mapping "
"shared library sections:\n"));
got_error = 1;
}
- END_CATCH
if (!got_error
&& (auto_solib_add || was_loaded || libpthread_solib_p (so)))
}
static void
-reload_shared_libraries (char *ignored, int from_tty,
+reload_shared_libraries (const char *ignored, int from_tty,
struct cmd_list_element *e)
{
const struct target_so_ops *ops;
at the start of gdb_sysroot with "target:". */
static void
-gdb_sysroot_changed (char *ignored, int from_tty,
+gdb_sysroot_changed (const char *ignored, int from_tty,
struct cmd_list_element *e)
{
const char *old_prefix = "remote:";
}
-/* Handler for library-specific lookup of global symbol NAME in OBJFILE. Call
- the library-specific handler if it is installed for the current target. */
-
-struct block_symbol
-solib_global_lookup (struct objfile *objfile,
- const char *name,
- const domain_enum domain)
-{
- const struct target_so_ops *ops = solib_ops (target_gdbarch ());
-
- if (ops->lookup_lib_global_symbol != NULL)
- return ops->lookup_lib_global_symbol (objfile, name, domain);
- return (struct block_symbol) {NULL, NULL};
-}
-
/* Lookup the value for a specific symbol from dynamic symbol table. Look
up symbol from ABFD. MATCH_SYM is a callback function to determine
whether to pick up a symbol. DATA is the input of this callback
{
unsigned int i;
- asymbol **symbol_table = (asymbol **) xmalloc (storage_needed);
- struct cleanup *back_to = make_cleanup (xfree, symbol_table);
+ gdb::def_vector<asymbol *> storage (storage_needed / sizeof (asymbol *));
+ asymbol **symbol_table = storage.data ();
unsigned int number_of_symbols =
bfd_canonicalize_symtab (abfd, symbol_table);
if (bfd_get_flavour (abfd) == bfd_target_elf_flavour
&& gdbarch_elf_make_msymbol_special_p (gdbarch))
{
- struct minimal_symbol msym;
+ struct minimal_symbol msym {};
- memset (&msym, 0, sizeof (msym));
SET_MSYMBOL_VALUE_ADDRESS (&msym, symaddr);
gdbarch_elf_make_msymbol_special (gdbarch, sym, &msym);
symaddr = MSYMBOL_VALUE_RAW_ADDRESS (&msym);
break;
}
}
- do_cleanups (back_to);
}
return symaddr;
if (storage_needed > 0)
{
unsigned int i;
- asymbol **symbol_table = (asymbol **) xmalloc (storage_needed);
- struct cleanup *back_to = make_cleanup (xfree, symbol_table);
+ gdb::def_vector<asymbol *> storage (storage_needed / sizeof (asymbol *));
+ asymbol **symbol_table = storage.data ();
unsigned int number_of_symbols =
bfd_canonicalize_dynamic_symtab (abfd, symbol_table);
break;
}
}
- do_cleanups (back_to);
}
return symaddr;
}
{
solib_data = gdbarch_data_register_pre_init (solib_init);
- observer_attach_free_objfile (remove_user_added_objfile);
+ gdb::observers::free_objfile.attach (remove_user_added_objfile);
add_com ("sharedlibrary", class_files, sharedlibrary_command,
_("Load shared object library symbols for files matching REGEXP."));
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