2009-10-19 Pedro Alves <pedro@codesourcery.com>

	    Stan Shebs	<stan@codesourcery.com>

	Add base multi-executable/process support to GDB.

	gdb/
	* Makefile.in (SFILES): Add progspace.c.
	(COMMON_OBS): Add progspace.o.
	* progspace.h: New.
	* progspace.c: New.

	* breakpoint.h (struct bp_target_info) <placed_address_space>: New
	field.
	(struct bp_location) <pspace>: New field.
	(struct breakpoint) <pspace>: New field.
	(bpstat_stop_status, breakpoint_here_p)
	(moribund_breakpoint_here_p, breakpoint_inserted_here_p)
	(regular_breakpoint_inserted_here_p)
	(software_breakpoint_inserted_here_p, breakpoint_thread_match)
	(set_default_breakpoint): Adjust prototypes.
	(remove_breakpoints_pid, breakpoint_program_space_exit): Declare.
	(insert_single_step_breakpoint, deprecated_insert_raw_breakpoint):
	Adjust prototypes.
	* breakpoint.c (executing_startup): Delete.
	(default_breakpoint_sspace): New.
	(breakpoint_restore_shadows): Skip if the address space doesn't
	match.
	(update_watchpoint): Record the frame's program space in the
	breakpoint location.
	(insert_bp_location): Record the address space in target_info.
	Adjust to pass the symbol space to solib_name_from_address.
	(breakpoint_program_space_exit): New.
	(insert_breakpoint_locations): Switch the symbol space and thread
	when inserting breakpoints.  Don't insert breakpoints in a vfork
	parent waiting for vfork done if we're not attached to the vfork
	child.
	(remove_breakpoints_pid): New.
	(reattach_breakpoints): Switch to a thread of PID.  Ignore
	breakpoints of other symbol spaces.
	(create_internal_breakpoint): Store the symbol space in the sal.
	(create_longjmp_master_breakpoint): Iterate over all symbol
	spaces.
	(update_breakpoints_after_exec): Ignore breakpoints for other
	symbol spaces.
	(remove_breakpoint): Rename to ...
	(remove_breakpoint_1): ... this.  Pass the breakpoints symbol
	space to solib_name_from_address.
	(remove_breakpoint): New.
	(mark_breakpoints_out): Ignore breakpoints from other symbol
	spaces.
	(breakpoint_init_inferior): Ditto.
	(breakpoint_here_p): Add an address space argument and adjust to
	use breakpoint_address_match.
	(moribund_breakpoint_here_p): Ditto.
	(regular_breakpoint_inserted_here_p): Ditto.
	(breakpoint_inserted_here_p): Ditto.
	(software_breakpoint_inserted_here_p): Ditto.
	(breakpoint_thread_match): Ditto.
	(bpstat_check_location): Ditto.
	(bpstat_stop_status): Ditto.
	(print_breakpoint_location): If there's a location to print,
	switch the current symbol space.
	(print_one_breakpoint_location): Add `allflag' argument.
	(print_one_breakpoint): Ditto.	Adjust.
	(do_captured_breakpoint_query): Adjust.
	(breakpoint_1): Adjust.
	(breakpoint_has_pc): Also match the symbol space.
	(describe_other_breakpoints): Add a symbol space argument and
	adjust.
	(set_default_breakpoint): Add a symbol space argument.	Set
	default_breakpoint_sspace.
	(breakpoint_address_match): New.
	(check_duplicates_for): Add an address space argument, and adjust.
	(set_raw_breakpoint): Record the symbol space in the location and
	in the breakpoint.
	(set_longjmp_breakpoint): Skip longjmp master breakpoints from
	other symbol spaces.
	(remove_thread_event_breakpoints, remove_solib_event_breakpoints)
	(disable_breakpoints_in_shlibs): Skip breakpoints from other
	symbol spaces.
	(disable_breakpoints_in_unloaded_shlib): Match symbol spaces.
	(create_catchpoint): Set the symbol space in the sal.
	(disable_breakpoints_before_startup): Skip breakpoints from other
	symbol spaces.	Set executing_startup in the current symbol space.
	(enable_breakpoints_after_startup): Clear executing_startup in the
	current symbol space.  Skip breakpoints from other symbol spaces.
	(clone_momentary_breakpoint): Also copy the symbol space.
	(add_location_to_breakpoint): Set the location's symbol space.
	(bp_loc_is_permanent): Switch thread and symbol space.
	(create_breakpoint): Adjust.
	(expand_line_sal_maybe): Expand comment to mention symbol spaces.
	Switch thread and symbol space when reading memory.
	(parse_breakpoint_sals): Set the symbol space in the sal.
	(break_command_really): Ditto.
	(skip_prologue_sal): Switch and space.
	(resolve_sal_pc): Ditto.
	(watch_command_1): Record the symbol space in the sal.
	(create_ada_exception_breakpoint): Adjust.
	(clear_command): Adjust.  Match symbol spaces.
	(update_global_location_list): Use breakpoint_address_match.
	(breakpoint_re_set_one): Switch thread and space.
	(breakpoint_re_set): Save symbol space.
	(breakpoint_re_set_thread): Also reset the symbol space.
	(deprecated_insert_raw_breakpoint): Add an address space argument.
	Adjust.
	(insert_single_step_breakpoint): Ditto.
	(single_step_breakpoint_inserted_here_p): Ditto.
	(clear_syscall_counts): New.
	(_initialize_breakpoint): Install it as inferior_exit observer.

	* exec.h: Include "progspace.h".
	(exec_bfd, exec_bfd_mtime): New defines.
	(exec_close): Declare.
	* exec.c: Include "gdbthread.h" and "progspace.h".
	(exec_bfd, exec_bfd_mtime, current_target_sections_1): Delete.
	(using_exec_ops): New.
	(exec_close_1): Rename to exec_close, and make public.
	(exec_close): Rename to exec_close_1, and adjust all callers.  Add
	description.  Remove target sections and close executables from
	all program spaces.
	(exec_file_attach): Add comment.
	(add_target_sections): Check on `using_exec_ops' to check if the
	target should be pushed.
	(remove_target_sections): Only unpush the target if there are no
	more target sections in any symbol space.
	* gdbcore.h: Include "exec.h".
	(exec_bfd, exec_bfd_mtime): Remove declarations.

	* frame.h (get_frame_program_space, get_frame_address_space)
	(frame_unwind_program_space): Declare.
	* frame.c (struct frame_info) <pspace, aspace>: New fields.
	(create_sentinel_frame): Add program space argument.  Set the
	pspace and aspace fields of the frame object.
	(get_current_frame, create_new_frame): Adjust.
	(get_frame_program_space): New.
	(frame_unwind_program_space): New.
	(get_frame_address_space): New.
	* stack.c (print_frame_info): Adjust.
	(print_frame): Use the frame's program space.

	* gdbthread.h (any_live_thread_of_process): Declare.
	* thread.c (any_live_thread_of_process): New.
	(switch_to_thread): Switch the program space as well.
	(restore_selected_frame): Don't warn if trying to restore frame
	level 0.

	* inferior.h: Include "progspace.h".
	(detach_fork): Declare.
	(struct inferior) <removable, aspace, pspace>
	<vfork_parent, vfork_child, pending_detach>
	<waiting_for_vfork_done>: New fields.
	<terminal_info>: Remove field.
	<data, num_data>: New fields.
	(register_inferior_data, register_inferior_data_with_cleanup)
	(clear_inferior_data, set_inferior_data, inferior_data): Declare.
	(exit_inferior, exit_inferior_silent, exit_inferior_num_silent)
	(inferior_appeared): Declare.
	(find_inferior_pid): Typo.
	(find_inferior_id, find_inferior_for_program_space): Declare.
	(set_current_inferior, save_current_inferior, prune_inferiors)
	(number_of_inferiors): Declare.
	(inferior_list): Declare.
	* inferior.c: Include "gdbcore.h" and "symfile.h".
	(inferior_list): Make public.
	(delete_inferior_1): Always delete thread silently.
	(find_inferior_id): Make public.
	(current_inferior_): New.
	(current_inferior): Use it.
	(set_current_inferior): New.
	(restore_inferior): New.
	(save_current_inferior): New.
	(free_inferior): Free the per-inferior data.
	(add_inferior_silent): Allocate per-inferior data.
	Call inferior_appeared.
	(delete_threads_of_inferior): New.
	(delete_inferior_1): Adjust interface to take an inferior pointer.
	(delete_inferior): Adjust.
	(delete_inferior_silent): Adjust.
	(exit_inferior_1): New.
	(exit_inferior): New.
	(exit_inferior_silent): New.
	(exit_inferior_num_silent): New.
	(detach_inferior): Adjust.
	(inferior_appeared): New.
	(discard_all_inferiors): Adjust.
	(find_inferior_id): Make public.  Assert pid is not zero.
	(find_inferior_for_program_space): New.
	(have_inferiors): Check if we have any inferior with pid not zero.
	(have_live_inferiors): Go over all pushed targets looking for
	process_stratum.
	(prune_inferiors): New.
	(number_of_inferiors): New.
	(print_inferior): Add executable column.  Print vfork parent/child
	relationships.
	(inferior_command): Adjust to cope with not running inferiors.
	(remove_inferior_command): New.
	(add_inferior_command): New.
	(clone_inferior_command): New.
	(struct inferior_data): New.
	(struct inferior_data_registration): New.
	(struct inferior_data_registry): New.
	(inferior_data_registry): New.
	(register_inferior_data_with_cleanup): New.
	(register_inferior_data): New.
	(inferior_alloc_data): New.
	(inferior_free_data): New.
	(clear_inferior_data): New.
	(set_inferior_data): New.
	(inferior_data): New.
	(initialize_inferiors): New.
	(_initialize_inferiors): Register "add-inferior",
	"remove-inferior" and "clone-inferior" commands.

	* objfiles.h: Include "progspace.h".
	(struct objfile) <pspace>: New field.
	(symfile_objfile, object_files): Don't declare.
	(ALL_PSPACE_OBJFILES): New.
	(ALL_PSPACE_OBJFILES_SAFE): New.
	(ALL_OBJFILES, ALL_OBJFILES_SAFE): Adjust.
	(ALL_PSPACE_SYMTABS): New.
	(ALL_PRIMARY_SYMTABS): Adjust.
	(ALL_PSPACE_PRIMARY_SYMTABS): New.
	(ALL_PSYMTABS): Adjust.
	(ALL_PSPACE_PSYMTABS): New.
	* objfiles.c (object_files, symfile_objfile): Delete.
	(struct objfile_sspace_info): New.
	(objfiles_pspace_data): New.
	(objfiles_pspace_data_cleanup): New.
	(get_objfile_pspace_data): New.
	(objfiles_changed_p): Delete.
	(allocate_objfile): Set the objfile's program space.  Adjust to
	reference objfiles_changed_p in pspace data.
	(free_objfile): Adjust to reference objfiles_changed_p in pspace
	data.
	(objfile_relocate): Ditto.
	(update_section_map): Add pspace argument.  Adjust to iterate over
	objfiles in the passed in pspace.
	(find_pc_section): Delete sections and num_sections statics.
	Adjust to refer to program space's objfiles_changed_p.	Adjust to
	refer to sections and num_sections store in the objfile's pspace
	data.
	(objfiles_changed): Adjust to reference objfiles_changed_p in
	pspace data.
	(_initialize_objfiles): New.
	* linespec.c (decode_all_digits, decode_dollar): Set the sal's
	program space.
	* source.c (current_source_pspace): New.
	(get_current_source_symtab_and_line): Set the sal's program space.
	(set_current_source_symtab_and_line): Set current_source_pspace.
	(select_source_symtab): Ditto.	Use ALL_OBJFILES.
	(forget_cached_source_info): Iterate over all program spaces.
	* symfile.c (clear_symtab_users): Adjust.
	* symmisc.c (print_symbol_bcache_statistics): Iterate over all
	program spaces.
	(print_objfile_statistics): Ditto.
	(maintenance_print_msymbols): Ditto.
	(maintenance_print_objfiles): Ditto.
	(maintenance_info_symtabs): Ditto.
	(maintenance_info_psymtabs): Ditto.
	* symtab.h (SYMTAB_PSPACE): New.
	(struct symtab_and_line) <pspace>: New field.
	* symtab.c (init_sal): Clear the sal's program space.
	(find_pc_sect_symtab): Set the sal's program space.  Switch thread
	and space.
	(append_expanded_sal): Add program space argument.  Iterate over
	all program spaces.
	(expand_line_sal): Iterate over all program spaces.  Switch
	program space.

	* target.h (enum target_waitkind) <TARGET_WAITKIND_VFORK_DONE>: New.
	(struct target_ops) <to_thread_address_space>: New field.
	(target_thread_address_space): Define.
	* target.c (target_detach): Only remove breakpoints from the
	inferior we're detaching.
	(target_thread_address_space): New.

	* defs.h (initialize_progspace): Declare.
	* top.c (gdb_init): Call it.

	* solist.h (struct so_list) <sspace>: New field.
	* solib.h (struct program_space): Forward declare.
	(solib_name_from_address): Adjust prototype.
	* solib.c (so_list_head): Replace with a macro referencing the
	program space.
	(update_solib_list): Set the so's program space.
	(solib_name_from_address): Add a program space argument and adjust.

	* solib-svr4.c (struct svr4_info) <pid>: Delete field.
	<interp_text_sect_low, interp_text_sect_high, interp_plt_sect_low>
	<interp_plt_sect_high>: New fields.
	(svr4_info_p, svr4_info): Delete.
	(solib_svr4_sspace_data): New.
	(get_svr4_info): Rewrite.
	(svr4_sspace_data_cleanup): New.
	(open_symbol_file_object): Adjust.
	(svr4_default_sos): Adjust.
	(svr4_fetch_objfile_link_map): Adjust.
	(interp_text_sect_low, interp_text_sect_high, interp_plt_sect_low)
	(interp_plt_sect_high): Delete.
	(svr4_in_dynsym_resolve_code): Adjust.
	(enable_break): Adjust.
	(svr4_clear_solib): Revert bit that removed the svr4_info here,
	and reinstate clearing debug_base, debug_loader_offset_p,
	debug_loader_offset and debug_loader_name.
	(_initialize_svr4_solib): Register solib_svr4_pspace_data.  Don't
	install an inferior_exit observer anymore.

	* printcmd.c (struct display) <pspace>: New field.
	(display_command): Set the display's sspace.
	(do_one_display): Match the display's sspace.
	(display_uses_solib_p): Ditto.

	* linux-fork.c (detach_fork): Moved to infrun.c.
	(_initialize_linux_fork): Moved "detach-on-fork" command to
	infrun.c.
	* infrun.c (detach_fork): Moved from linux-fork.c.
	(proceed_after_vfork_done): New.
	(handle_vfork_child_exec_or_exit): New.
	(follow_exec_mode_replace, follow_exec_mode_keep)
	(follow_exec_mode_names, follow_exec_mode_string)
	(show_follow_exec_mode_string): New.
	(follow_exec): New.  Reinstate the mark_breakpoints_out call.
	Remove shared libraries before attaching new executable.  If user
	wants to keep the inferior, keep it.
	(displaced_step_fixup): Adjust to pass an address space to the
	breakpoints module.
	(resume): Ditto.
	(clear_proceed_status): In all-stop mode, always clear the proceed
	status of all threads.
	(prepare_to_proceed): Adjust to pass an address space to the
	breakpoints module.
	(proceed): Ditto.
	(adjust_pc_after_break): Ditto.
	(handle_inferior_event): When handling a process exit, switch the
	program space to the inferior's that had exited.  Call
	handle_vfork_child_exec_or_exit.  Adjust to pass an address space
	to the breakpoints module.  In non-stop mode, when following a
	fork and detach-fork is off, also resume the other branch.  Handle
	TARGET_WAITKIND_VFORK_DONE.  Set the program space in sals.
	(normal_stop): Prune inferiors.
	(_initialize_infrun): Install the new "follow-exec-mode" command.
	"detach-on-fork" moved here.

	* regcache.h (get_regcache_aspace): Declare.
	* regcache.c (struct regcache) <aspace>: New field.
	(regcache_xmalloc): Clear the aspace.
	(get_regcache_aspace): New.
	(regcache_cpy): Copy the aspace field.
	(regcache_cpy_no_passthrough): Ditto.
	(get_thread_regcache): Fetch the thread's address space from the
	target, and store it in the regcache.

	* infcall.c (call_function_by_hand): Set the sal's pspace.

	* arch-utils.c (default_has_shared_address_space): New.
	* arch-utils.h (default_has_shared_address_space): Declare.

	* gdbarch.sh (has_shared_address_space): New.
	* gdbarch.h, gdbarch.c: Regenerate.

	* linux-tdep.c: Include auxv.h, target.h, elf/common.h.
	(linux_has_shared_address_space): New.
	(_initialize_linux_tdep): Declare.

	* arm-tdep.c (arm_software_single_step): Pass the frame's address
	space to insert_single_step_breakpoint.
	* arm-linux-tdep.c (arm_linux_software_single_step): Pass the
	frame's pspace to breakpoint functions.
	* cris-tdep.c (crisv32_single_step_through_delay): Ditto.
	(cris_software_single_step): Ditto.
	* mips-tdep.c (deal_with_atomic_sequence): Add frame argument.
	Pass the frame's pspace to breakpoint functions.
	(mips_software_single_step): Adjust.
	(mips_single_step_through_delay): Adjust.
	* rs6000-aix-tdep.c (rs6000_software_single_step): Adjust.
	* rs6000-tdep.c (ppc_deal_with_atomic_sequence): Adjust.
	* solib-irix.c (enable_break): Adjust to pass the current frame's
	address space to breakpoint functions.
	* sparc-tdep.c (sparc_software_single_step): Ditto.
	* spu-tdep.c (spu_software_single_step): Ditto.
	* alpha-tdep.c (alpha_software_single_step): Ditto.
	* record.c (record_wait): Adjust to pass an address space to the
	breakpoints module.

	* fork-child.c (fork_inferior): Set the new inferior's program and
	address spaces.
	* inf-ptrace.c (inf_ptrace_follow_fork): Copy the parent's program
	and address spaces.
	(inf_ptrace_attach): Set the inferior's program and address spaces.
	* linux-nat.c: Include "solib.h".
	(linux_child_follow_fork): Manage parent and child's program and
	address spaces.	 Clone the parent's program space if necessary.
	Don't wait for the vfork to be done here.  Refuse to resume if
	following the vfork parent while leaving the child stopped.
	(resume_callback): Don't resume a vfork parent.
	(linux_nat_resume): Also check for pending events in the
	lp->waitstatus field.
	(linux_handle_extended_wait): Report TARGET_WAITKIND_VFORK_DONE
	events to the core.
	(stop_wait_callback): Don't wait for SIGSTOP on vfork parents.
	(cancel_breakpoint): Adjust.
	* linux-thread-db.c (thread_db_wait): Don't remove thread event
	breakpoints here.
	(thread_db_mourn_inferior): Don't mark breakpoints out here.
	Remove thread event breakpoints after mourning.
	* corelow.c: Include progspace.h.
	(core_open): Set the inferior's program and address spaces.
	* remote.c (remote_add_inferior): Set the new inferior's program
	and address spaces.
	(remote_start_remote): Update address spaces.
	(extended_remote_create_inferior_1): Don't init the thread list if
	we already debugging other inferiors.
	* darwin-nat.c (darwin_attach): Set the new inferior's program and
	address spaces.
	* gnu-nat.c (gnu_attach): Ditto.
	* go32-nat.c (go32_create_inferior): Ditto.
	* inf-ttrace.c (inf_ttrace_follow_fork, inf_ttrace_attach): Ditto.
	* monitor.c (monitor_open): Ditto.
	* nto-procfs.c (procfs_attach, procfs_create_inferior): Ditto.
	* procfs.c (do_attach): Ditto.
	* windows-nat.c (do_initial_windows_stuff): Ditto.

	* inflow.c (inferior_process_group)
	(terminal_init_inferior_with_pgrp, terminal_inferior,
	(terminal_ours_1, inflow_inferior_exit, copy_terminal_info)
	(child_terminal_info, new_tty_postfork, set_sigint_trap): Adjust
	to use per-inferior data instead of inferior->terminal_info.
	(inflow_inferior_data): New.
	(inflow_new_inferior): Delete.
	(inflow_inferior_data_cleanup): New.
	(get_inflow_inferior_data): New.

	* mi/mi-interp.c (mi_new_inferior): Rename to...
	(mi_inferior_appeared): ... this.
	(mi_interpreter_init): Adjust.

	* tui/tui-disasm.c: Include "progspace.h".
	(tui_set_disassem_content): Pass an address space to
	breakpoint_here_p.

	* NEWS: Mention multi-program debugging support.  Mention new
	commands "add-inferior", "clone-inferior", "remove-inferior",
	"maint info program-spaces", and new option "set
	follow-exec-mode".

2009-10-19  Pedro Alves	 <pedro@codesourcery.com>
	    Stan Shebs	<stan@codesourcery.com>

	gdb/doc/
	* observer.texi (new_inferior): Rename to...
	(inferior_appeared): ... this.

2009-10-19  Pedro Alves	 <pedro@codesourcery.com>
	    Stan Shebs	<stan@codesourcery.com>

	gdb/testsuite/
	* gdb.base/foll-vfork.exp: Adjust to spell out "follow-fork".
	* gdb.base/foll-exec.exp: Adjust to expect a process id before
	"Executing new program".
	* gdb.base/foll-fork.exp: Adjust to spell out "follow-fork".
	* gdb.base/multi-forks.exp: Ditto.  Adjust to the inferior being
	left listed after having been killed.
	* gdb.base/attach.exp: Adjust to spell out "symbol-file".
	* gdb.base/maint.exp: Adjust test.

	* Makefile.in (ALL_SUBDIRS): Add gdb.multi.
	* gdb.multi/Makefile.in: New.
	* gdb.multi/base.exp: New.
	* gdb.multi/goodbye.c: New.
	* gdb.multi/hangout.c: New.
	* gdb.multi/hello.c: New.
	* gdb.multi/bkpt-multi-exec.c: New.
	* gdb.multi/bkpt-multi-exec.exp: New.
	* gdb.multi/crashme.c: New.

2009-10-19  Pedro Alves	 <pedro@codesourcery.com>
	    Stan Shebs	<stan@codesourcery.com>

	gdb/doc/
	* gdb.texinfo (Inferiors): Rename node to ...
	(Inferiors and Programs): ... this.  Mention running multiple
	programs in the same debug session.
	<info inferiors>: Mention the new 'Executable' column if "info
	inferiors".  Update examples.  Document the "add-inferior",
	"clone-inferior", "remove-inferior" and "maint info
	program-spaces" commands.
	(Process): Rename node to...
	(Forks): ... this.  Document "set|show follow-exec-mode".

1 files changed, 63 insertions, 90 deletions

diff --git a/gdb/solib-svr4.c b/gdb/solib-svr4.c
index 6cfaa85ea8..d685ea5a4d 100644
--- a/gdb/solib-svr4.c
+++ b/gdb/solib-svr4.c
@@ -273,12 +273,10 @@ IGNORE_FIRST_LINK_MAP_ENTRY (struct so_list *so)
 				ptr_type) == 0;
 }
 
-/* Per-inferior SVR4 specific data.  */
+/* Per pspace SVR4 specific data.  */
 
 struct svr4_info
 {
-  int pid;
-
   CORE_ADDR debug_base;	/* Base of dynamic linker structures */
 
   /* Validity flag for debug_loader_offset.  */
@@ -292,69 +290,40 @@ struct svr4_info
 
   /* Load map address for the main executable.  */
   CORE_ADDR main_lm_addr;
-};
 
-/* List of known processes using solib-svr4 shared libraries, storing
-   the required bookkeeping for each.  */
-
-typedef struct svr4_info *svr4_info_p;
-DEF_VEC_P(svr4_info_p);
-VEC(svr4_info_p) *svr4_info = NULL;
+  CORE_ADDR interp_text_sect_low;
+  CORE_ADDR interp_text_sect_high;
+  CORE_ADDR interp_plt_sect_low;
+  CORE_ADDR interp_plt_sect_high;
+};
 
-/* Get svr4 data for inferior PID (target id).  If none is found yet,
-   add it now.  This function always returns a valid object.  */
+/* Per-program-space data key.  */
+static const struct program_space_data *solib_svr4_pspace_data;
 
-struct svr4_info *
-get_svr4_info (int pid)
+static void
+svr4_pspace_data_cleanup (struct program_space *pspace, void *arg)
 {
-  int ix;
-  struct svr4_info *it;
-
-  gdb_assert (pid != 0);
-
-  for (ix = 0; VEC_iterate (svr4_info_p, svr4_info, ix, it); ++ix)
-    {
-      if (it->pid == pid)
-	return it;
-    }
-
-  it = XZALLOC (struct svr4_info);
-  it->pid = pid;
-
-  VEC_safe_push (svr4_info_p, svr4_info, it);
+  struct svr4_info *info;
 
-  return it;
+  info = program_space_data (pspace, solib_svr4_pspace_data);
+  xfree (info);
 }
 
-/* Get rid of any svr4 related bookkeeping for inferior PID (target
-   id).  */
+/* Get the current svr4 data.  If none is found yet, add it now.  This
+   function always returns a valid object.  */
 
-static void
-remove_svr4_info (int pid)
+static struct svr4_info *
+get_svr4_info (void)
 {
-  int ix;
-  struct svr4_info *it;
-
-  for (ix = 0; VEC_iterate (svr4_info_p, svr4_info, ix, it); ++ix)
-    {
-      if (it->pid == pid)
-	{
-	  VEC_unordered_remove (svr4_info_p, svr4_info, ix);
-	  return;
-	}
-    }
-}
+  struct svr4_info *info;
 
-/* This is an "inferior_exit" observer.  Inferior PID (target id) is
-   being removed from the inferior list, because it exited, was
-   killed, detached, or we just dropped the connection to the debug
-   interface --- discard any solib-svr4 related bookkeeping for this
-   inferior.  */
+  info = program_space_data (current_program_space, solib_svr4_pspace_data);
+  if (info != NULL)
+    return info;
 
-static void
-solib_svr4_inferior_exit (int pid)
-{
-  remove_svr4_info (pid);
+  info = XZALLOC (struct svr4_info);
+  set_program_space_data (current_program_space, solib_svr4_pspace_data, info);
+  return info;
 }
 
 /* Local function prototypes */
@@ -931,7 +900,7 @@ open_symbol_file_object (void *from_ttyp)
   int l_name_size = TYPE_LENGTH (ptr_type);
   gdb_byte *l_name_buf = xmalloc (l_name_size);
   struct cleanup *cleanups = make_cleanup (xfree, l_name_buf);
-  struct svr4_info *info = get_svr4_info (PIDGET (inferior_ptid));
+  struct svr4_info *info = get_svr4_info ();
 
   if (symfile_objfile)
     if (!query (_("Attempt to reload symbols from process? ")))
@@ -982,8 +951,7 @@ open_symbol_file_object (void *from_ttyp)
 static struct so_list *
 svr4_default_sos (void)
 {
-  struct inferior *inf = current_inferior ();
-  struct svr4_info *info = get_svr4_info (inf->pid);
+  struct svr4_info *info = get_svr4_info ();
 
   struct so_list *head = NULL;
   struct so_list **link_ptr = &head;
@@ -1038,14 +1006,9 @@ svr4_current_sos (void)
   struct so_list *head = 0;
   struct so_list **link_ptr = &head;
   CORE_ADDR ldsomap = 0;
-  struct inferior *inf;
   struct svr4_info *info;
 
-  if (ptid_equal (inferior_ptid, null_ptid))
-    return NULL;
-
-  inf = current_inferior ();
-  info = get_svr4_info (inf->pid);
+  info = get_svr4_info ();
 
   /* Always locate the debug struct, in case it has moved.  */
   info->debug_base = 0;
@@ -1142,7 +1105,7 @@ CORE_ADDR
 svr4_fetch_objfile_link_map (struct objfile *objfile)
 {
   struct so_list *so;
-  struct svr4_info *info = get_svr4_info (PIDGET (inferior_ptid));
+  struct svr4_info *info = get_svr4_info ();
 
   /* Cause svr4_current_sos() to be run if it hasn't been already.  */
   if (info->main_lm_addr == 0)
@@ -1182,16 +1145,16 @@ match_main (char *soname)
 
 /* Return 1 if PC lies in the dynamic symbol resolution code of the
    SVR4 run time loader.  */
-static CORE_ADDR interp_text_sect_low;
-static CORE_ADDR interp_text_sect_high;
-static CORE_ADDR interp_plt_sect_low;
-static CORE_ADDR interp_plt_sect_high;
 
 int
 svr4_in_dynsym_resolve_code (CORE_ADDR pc)
 {
-  return ((pc >= interp_text_sect_low && pc < interp_text_sect_high)
-	  || (pc >= interp_plt_sect_low && pc < interp_plt_sect_high)
+  struct svr4_info *info = get_svr4_info ();
+
+  return ((pc >= info->interp_text_sect_low
+	   && pc < info->interp_text_sect_high)
+	  || (pc >= info->interp_plt_sect_low
+	      && pc < info->interp_plt_sect_high)
 	  || in_plt_section (pc, NULL));
 }
 
@@ -1265,14 +1228,13 @@ enable_break (struct svr4_info *info)
   asection *interp_sect;
   gdb_byte *interp_name;
   CORE_ADDR sym_addr;
-  struct inferior *inf = current_inferior ();
 
   /* First, remove all the solib event breakpoints.  Their addresses
      may have changed since the last time we ran the program.  */
   remove_solib_event_breakpoints ();
 
-  interp_text_sect_low = interp_text_sect_high = 0;
-  interp_plt_sect_low = interp_plt_sect_high = 0;
+  info->interp_text_sect_low = info->interp_text_sect_high = 0;
+  info->interp_plt_sect_low = info->interp_plt_sect_high = 0;
 
   /* If we already have a shared library list in the target, and
      r_debug contains r_brk, set the breakpoint there - this should
@@ -1308,18 +1270,20 @@ enable_break (struct svr4_info *info)
 	  interp_sect = bfd_get_section_by_name (tmp_bfd, ".text");
 	  if (interp_sect)
 	    {
-	      interp_text_sect_low =
+	      info->interp_text_sect_low =
 		bfd_section_vma (tmp_bfd, interp_sect) + load_addr;
-	      interp_text_sect_high =
-		interp_text_sect_low + bfd_section_size (tmp_bfd, interp_sect);
+	      info->interp_text_sect_high =
+		info->interp_text_sect_low
+		+ bfd_section_size (tmp_bfd, interp_sect);
 	    }
 	  interp_sect = bfd_get_section_by_name (tmp_bfd, ".plt");
 	  if (interp_sect)
 	    {
-	      interp_plt_sect_low =
+	      info->interp_plt_sect_low =
 		bfd_section_vma (tmp_bfd, interp_sect) + load_addr;
-	      interp_plt_sect_high =
-		interp_plt_sect_low + bfd_section_size (tmp_bfd, interp_sect);
+	      info->interp_plt_sect_high =
+		info->interp_plt_sect_low
+		+ bfd_section_size (tmp_bfd, interp_sect);
 	    }
 
 	  create_solib_event_breakpoint (target_gdbarch, sym_addr);
@@ -1412,18 +1376,20 @@ enable_break (struct svr4_info *info)
       interp_sect = bfd_get_section_by_name (tmp_bfd, ".text");
       if (interp_sect)
 	{
-	  interp_text_sect_low =
+	  info->interp_text_sect_low =
 	    bfd_section_vma (tmp_bfd, interp_sect) + load_addr;
-	  interp_text_sect_high =
-	    interp_text_sect_low + bfd_section_size (tmp_bfd, interp_sect);
+	  info->interp_text_sect_high =
+	    info->interp_text_sect_low
+	    + bfd_section_size (tmp_bfd, interp_sect);
 	}
       interp_sect = bfd_get_section_by_name (tmp_bfd, ".plt");
       if (interp_sect)
 	{
-	  interp_plt_sect_low =
+	  info->interp_plt_sect_low =
 	    bfd_section_vma (tmp_bfd, interp_sect) + load_addr;
-	  interp_plt_sect_high =
-	    interp_plt_sect_low + bfd_section_size (tmp_bfd, interp_sect);
+	  info->interp_plt_sect_high =
+	    info->interp_plt_sect_low
+	    + bfd_section_size (tmp_bfd, interp_sect);
 	}
 
       /* Now try to set a breakpoint in the dynamic linker.  */
@@ -1686,7 +1652,7 @@ svr4_solib_create_inferior_hook (void)
   struct thread_info *tp;
   struct svr4_info *info;
 
-  info = get_svr4_info (PIDGET (inferior_ptid));
+  info = get_svr4_info ();
 
   /* Relocate the main executable if necessary.  */
   svr4_relocate_main_executable ();
@@ -1726,7 +1692,14 @@ svr4_solib_create_inferior_hook (void)
 static void
 svr4_clear_solib (void)
 {
-  remove_svr4_info (PIDGET (inferior_ptid));
+  struct svr4_info *info;
+
+  info = get_svr4_info ();
+  info->debug_base = 0;
+  info->debug_loader_offset_p = 0;
+  info->debug_loader_offset = 0;
+  xfree (info->debug_loader_name);
+  info->debug_loader_name = NULL;
 }
 
 static void
@@ -1925,6 +1898,8 @@ void
 _initialize_svr4_solib (void)
 {
   solib_svr4_data = gdbarch_data_register_pre_init (solib_svr4_init);
+  solib_svr4_pspace_data
+    = register_program_space_data_with_cleanup (svr4_pspace_data_cleanup);
 
   svr4_so_ops.relocate_section_addresses = svr4_relocate_section_addresses;
   svr4_so_ops.free_so = svr4_free_so;
@@ -1937,6 +1912,4 @@ _initialize_svr4_solib (void)
   svr4_so_ops.bfd_open = solib_bfd_open;
   svr4_so_ops.lookup_lib_global_symbol = elf_lookup_lib_symbol;
   svr4_so_ops.same = svr4_same;
-
-  observer_attach_inferior_exit (solib_svr4_inferior_exit);
 }