Update glibc_thread_db.h from upstream.

Attempting to build gdbserver with our copy of thread_db.h yields:

In file included from ../../../src/gdb/gdbserver/../common/gdb_thread_db.h:4:0,
                 from ../../../src/gdb/gdbserver/thread-db.c:30:
../../../src/gdb/gdbserver/../common/glibc_thread_db.h:108:3: error: unknown type name ‘uint32_t’
In file included from ../../../src/gdb/gdbserver/../common/gdb_thread_db.h:4:0,
                 from ../../../src/gdb/gdbserver/thread-db.c:30:
../../../src/gdb/gdbserver/../common/glibc_thread_db.h:199:5: error: unknown type name ‘uintptr_t’
../../../src/gdb/gdbserver/../common/glibc_thread_db.h:269:3: error: unknown type name ‘intptr_t’
../../../src/gdb/gdbserver/../common/glibc_thread_db.h:270:3: error: unknown type name ‘intptr_t’


We used to have a workaround for this, but the patch to import
gnulib's stdint.h removed it:

  http://www.sourceware.org/ml/gdb-patches/2008-06/msg00050.html

and defs.h made to always include stdint.h.  However, gdbserver
doesn't include stdint.h in its equivalent server.h.

Rather than working around the issue, I've imported a more recent
version from glibc, which itself includes <stdint.h>.  Other than
copyright years and FSF snail mail address, the file hasn't been
touched since 2003 in glibc.  AFAICS, our version was updated last in
2000-09-03.

A note on the apparent license change: before the previous patch, this
file's contents were part of gdb_thread_db.h, and we can see that its
license's text was changed in this patch
<http://sourceware.org/ml/gdb-patches/2009-03/msg00251.html>.  That
was certainly just an easy to overlook grep/sed mistake that fell
through the cracks.

gdb/common/
2013-04-16  Pedro Alves  <palves@redhat.com>

	* glibc_thread_db.h: Update from upstream glibc
	(git 568035b7874a099087b77f7bba3e36a1173787b0).

1 files changed, 46 insertions, 25 deletions

diff --git a/gdb/common/glibc_thread_db.h b/gdb/common/glibc_thread_db.h
index 5ddfbc2..97423a4 100644
--- a/gdb/common/glibc_thread_db.h
+++ b/gdb/common/glibc_thread_db.h
@@ -1,26 +1,29 @@
-/* Copyright (C) 1999-2013 Free Software Foundation, Inc.
+/* thread_db.h -- interface to libthread_db.so library for debugging -lpthread
+   Copyright (C) 1999-2013 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
-   modify it under the terms of the GNU Library General Public License as
-   published by the Free Software Foundation; either version 3 of the
-   License, or (at your option) any later version.
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
 
    The GNU C Library is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-   Library General Public License for more details.
+   Lesser General Public License for more details.
 
-   You should have received a copy of the GNU General Public License
-   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
 
 #ifndef _THREAD_DB_H
 #define _THREAD_DB_H	1
 
-/* This is the debugger interface for the LinuxThreads library.  It is
-   modelled closely after the interface with same names in Solaris with
-   the goal to share the same code in the debugger.  */
+/* This is the debugger interface for the NPTL library.  It is
+   modelled closely after the interface with same names in Solaris
+   with the goal to share the same code in the debugger.  */
 #include <pthread.h>
+#include <stdint.h>
 #include <sys/types.h>
 #include <sys/procfs.h>
 
@@ -49,7 +52,10 @@ typedef enum
   TD_MALLOC,	  /* Out of memory.  */
   TD_PARTIALREG,  /* Not entire register set was read or written.  */
   TD_NOXREGS,	  /* X register set not available for given thread.  */
-  TD_NOTALLOC	  /* TLS memory not yet allocated.  */
+  TD_TLSDEFER,	  /* Thread has not yet allocated TLS for given module.  */
+  TD_NOTALLOC = TD_TLSDEFER,
+  TD_VERSION,	  /* Version if libpthread and libthread_db do not match.  */
+  TD_NOTLS	  /* There is no TLS segment in the given module.  */
 } td_err_e;
 
 
@@ -90,6 +96,10 @@ typedef struct td_thrhandle
 } td_thrhandle_t;
 
 
+/* Forward declaration of a type defined by and for the dynamic linker.  */
+struct link_map;
+
+
 /* Flags for `td_ta_thr_iter'.  */
 #define TD_THR_ANY_USER_FLAGS	0xffffffff
 #define TD_THR_LOWEST_PRIORITY	-20
@@ -97,18 +107,17 @@ typedef struct td_thrhandle
 
 
 #define TD_EVENTSIZE	2
-#define BT_UISHIFT	5 		/* log base 2 of BT_NBIPUI, to
-					   extract word index.  */
-#define BT_NBIPUI	(1 << BT_UISHIFT)       /* n bits per uint.  */
-#define BT_UIMASK	(BT_NBIPUI - 1)         /* to extract bit index.  */
+#define BT_UISHIFT	5 /* log base 2 of BT_NBIPUI, to extract word index */
+#define BT_NBIPUI	(1 << BT_UISHIFT)       /* n bits per uint */
+#define BT_UIMASK	(BT_NBIPUI - 1)         /* to extract bit index */
 
-/* Bitmask of enabled events.  */
+/* Bitmask of enabled events. */
 typedef struct td_thr_events
 {
   uint32_t event_bits[TD_EVENTSIZE];
 } td_thr_events_t;
 
-/* Event set manipulation macros.  */
+/* Event set manipulation macros. */
 #define __td_eventmask(n) \
   (UINT32_C (1) << (((n) - 1) & BT_UIMASK))
 #define __td_eventword(n) \
@@ -146,7 +155,7 @@ typedef enum
 {
   TD_ALL_EVENTS,		 /* Pseudo-event number.  */
   TD_EVENT_NONE = TD_ALL_EVENTS, /* Depends on context.  */
-  TD_READY,			 /* Is executable now.  */
+  TD_READY,			 /* Is executable now. */
   TD_SLEEP,			 /* Blocked in a synchronization obj.  */
   TD_SWITCHTO,			 /* Now assigned to a process.  */
   TD_SWITCHFROM,		 /* Not anymore assigned to a process.  */
@@ -168,8 +177,7 @@ typedef enum
 /* Values representing the different ways events are reported.  */
 typedef enum
 {
-  NOTIFY_BPT,			/* User must insert breakpoint at
-				   u.bptaddr.  */
+  NOTIFY_BPT,			/* User must insert breakpoint at u.bptaddr. */
   NOTIFY_AUTOBPT,		/* Breakpoint at u.bptaddr is automatically
 				   inserted.  */
   NOTIFY_SYSCALL		/* System call u.syscallno will be invoked.  */
@@ -193,7 +201,7 @@ typedef struct td_event_msg
   const td_thrhandle_t *th_p;	/* Thread reporting the event.  */
   union
   {
-#if 0
+# if 0
     td_synchandle_t *sh;	/* Handle of synchronization object.  */
 #endif
     uintptr_t data;		/* Event specific data.  */
@@ -262,15 +270,14 @@ typedef struct td_thrinfo
   psaddr_t ti_ro_area;			/* Unused.  */
   int ti_ro_size;			/* Unused.  */
   td_thr_state_e ti_state;		/* Thread state.  */
-  unsigned char ti_db_suspended;	/* Nonzero if suspended by
-					   debugger.  */
+  unsigned char ti_db_suspended;	/* Nonzero if suspended by debugger. */
   td_thr_type_e ti_type;		/* Type of the thread (system vs
 					   user thread).  */
   intptr_t ti_pc;			/* Unused.  */
   intptr_t ti_sp;			/* Unused.  */
   short int ti_flags;			/* Unused.  */
   int ti_pri;				/* Thread priority.  */
-  lwpid_t ti_lid;			/* Kernel pid for this thread.  */
+  lwpid_t ti_lid;			/* Kernel PID for this thread.  */
   sigset_t ti_sigmask;			/* Signal mask.  */
   unsigned char ti_traceme;		/* Nonzero if event reporting
 					   enabled.  */
@@ -290,6 +297,9 @@ extern td_err_e td_init (void);
 /* Historical relict.  Should not be used anymore.  */
 extern td_err_e td_log (void);
 
+/* Return list of symbols the library can request.  */
+extern const char **td_symbol_list (void);
+
 /* Generate new thread debug library handle for process PS.  */
 extern td_err_e td_ta_new (struct ps_prochandle *__ps, td_thragent_t **__ta);
 
@@ -342,7 +352,7 @@ extern td_err_e td_ta_clear_event (const td_thragent_t *__ta,
 
 /* Return information about last event.  */
 extern td_err_e td_ta_event_getmsg (const td_thragent_t *__ta,
-				    td_event_msg_t *msg);
+				    td_event_msg_t *__msg);
 
 
 /* Set suggested concurrency level for process associated with TA.  */
@@ -394,6 +404,17 @@ extern td_err_e td_thr_setxregs (const td_thrhandle_t *__th,
 				 const void *__addr);
 
 
+/* Get address of the given module's TLS storage area for the given thread.  */
+extern td_err_e td_thr_tlsbase (const td_thrhandle_t *__th,
+				unsigned long int __modid,
+				psaddr_t *__base);
+
+/* Get address of thread local variable.  */
+extern td_err_e td_thr_tls_get_addr (const td_thrhandle_t *__th,
+				     psaddr_t __map_address, size_t __offset,
+				     psaddr_t *__address);
+
+
 /* Enable reporting for EVENT for thread TH.  */
 extern td_err_e td_thr_event_enable (const td_thrhandle_t *__th, int __event);