Add client_state struct.

Collect per client specific global data items into struct client_state,
which is similar in purpose to remote.c::remote_state.

gdbserver/ChangeLog
	* server.h (struct client_state): New.
	* server.c (cont_thread, general_thread, multi_process)
	(report_fork_events, report_vfork_events, report_exec_events)
	(report_thread_events, swbreak_feature, hwbreak_feature)
	(vCont_supported, disable_randomization, pass_signals)
	(program_signals, program_signals_p, last_status, last_ptid, own_buf):
	Moved to client_state.
	* remote-utils.c (remote_debug, noack_mode)
	(transport_is_reliable): Moved to client_state.
	* tracepoint.c (current_traceframe): Moved to client_state.

	Update all callers.
	* server.c, remote-utils.c, tracepoint.c, fork-child.c,
	linux-low.c, remote-utils.h, target.c: Use client_state.

gdb/gdbserver/server.h

@@ -60,8 +60,6 @@ int vsnprintf(char *str, size_t size, const char *format, va_list ap);
 #include "gdb_signals.h"
 #include "target.h"
 #include "mem-break.h"
-#include "gdbthread.h"
-#include "inferiors.h"
 #include "environ.h"
 
 /* Target-specific functions */
@@ -70,42 +68,16 @@ void initialize_low ();
 
 /* Public variables in server.c */
 
-extern ptid_t cont_thread;
-extern ptid_t general_thread;
-
 extern int server_waiting;
-extern int pass_signals[];
-extern int program_signals[];
-extern int program_signals_p;
 
 extern int disable_packet_vCont;
 extern int disable_packet_Tthread;
 extern int disable_packet_qC;
 extern int disable_packet_qfThreadInfo;
 
-extern char *own_buf;
-
 extern int run_once;
-extern int multi_process;
-extern int report_fork_events;
-extern int report_vfork_events;
-extern int report_exec_events;
-extern int report_thread_events;
 extern int non_stop;
 
-/* True if the "swbreak+" feature is active.  In that case, GDB wants
-   us to report whether a trap is explained by a software breakpoint
-   and for the server to handle PC adjustment if necessary on this
-   target.  Only enabled if the target supports it.  */
-extern int swbreak_feature;
-
-/* True if the "hwbreak+" feature is active.  In that case, GDB wants
-   us to report whether a trap is explained by a hardware breakpoint.
-   Only enabled if the target supports it.  */
-extern int hwbreak_feature;
-
-extern int disable_randomization;
-
 #if USE_WIN32API
 #include <winsock2.h>
 typedef SOCKET gdb_fildes_t;
@@ -158,8 +130,79 @@ extern void post_fork_inferior (int pid, const char *program);
 /* Get the gdb_environ being used in the current session.  */
 extern gdb_environ *get_environ ();
 
-extern target_waitstatus last_status;
-extern ptid_t last_ptid;
 extern unsigned long signal_pid;
 
+
+/* Description of the client remote protocol state for the currently
+   connected client.  */
+
+struct client_state
+{
+  client_state ():
+    own_buf ((char *) xmalloc (PBUFSIZ + 1)) 
+  {}
+
+  /* The thread set with an `Hc' packet.  `Hc' is deprecated in favor of
+     `vCont'.  Note the multi-process extensions made `vCont' a
+     requirement, so `Hc pPID.TID' is pretty much undefined.  So
+     CONT_THREAD can be null_ptid for no `Hc' thread, minus_one_ptid for
+     resuming all threads of the process (again, `Hc' isn't used for
+     multi-process), or a specific thread ptid_t.  */
+  ptid_t cont_thread;
+
+  /* The thread set with an `Hg' packet.  */
+  ptid_t general_thread;
+
+  int multi_process = 0;
+  int report_fork_events = 0;
+  int report_vfork_events = 0;
+  int report_exec_events = 0;
+  int report_thread_events = 0;
+
+  /* True if the "swbreak+" feature is active.  In that case, GDB wants
+     us to report whether a trap is explained by a software breakpoint
+     and for the server to handle PC adjustment if necessary on this
+     target.  Only enabled if the target supports it.  */
+  int swbreak_feature = 0;
+  /* True if the "hwbreak+" feature is active.  In that case, GDB wants
+     us to report whether a trap is explained by a hardware breakpoint.
+     Only enabled if the target supports it.  */
+  int hwbreak_feature = 0;
+
+  /* True if the "vContSupported" feature is active.  In that case, GDB
+     wants us to report whether single step is supported in the reply to
+     "vCont?" packet.  */
+  int vCont_supported = 0;
+
+  /* Whether we should attempt to disable the operating system's address
+     space randomization feature before starting an inferior.  */
+  int disable_randomization = 0;
+
+  int pass_signals[GDB_SIGNAL_LAST];
+  int program_signals[GDB_SIGNAL_LAST];
+  int program_signals_p = 0;
+
+  /* Last status reported to GDB.  */
+  struct target_waitstatus last_status;
+  ptid_t last_ptid;
+
+  char *own_buf;
+
+  /* If true, then GDB has requested noack mode.  */
+  int noack_mode = 0;
+  /* If true, then we tell GDB to use noack mode by default.  */
+  int transport_is_reliable = 0;
+
+  /* The traceframe to be used as the source of data to send back to
+     GDB.  A value of -1 means to get data from the live program.  */
+
+  int current_traceframe = -1;
+
+};
+
+client_state &get_client_state ();
+
+#include "gdbthread.h"
+#include "inferiors.h"
+
 #endif /* SERVER_H */