1 /* Main code for remote server for GDB.
2 Copyright (C) 1989-2017 Free Software Foundation, Inc.
4 This file is part of GDB.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program. If not, see <http://www.gnu.org/licenses/>. */
20 #include "gdbthread.h"
25 #include "signals-state-save-restore.h"
33 #include "btrace-common.h"
34 #include "filestuff.h"
35 #include "tracepoint.h"
39 #include "common-inferior.h"
40 #include "job-control.h"
43 #include "common/selftest.h"
45 #define require_running_or_return(BUF) \
46 if (!target_running ()) \
52 #define require_running_or_break(BUF) \
53 if (!target_running ()) \
59 /* The environment to pass to the inferior when creating it. */
61 static gdb_environ our_environ
;
63 /* Start the inferior using a shell. */
65 /* We always try to start the inferior using a shell. */
67 int startup_with_shell
= 1;
69 /* The thread set with an `Hc' packet. `Hc' is deprecated in favor of
70 `vCont'. Note the multi-process extensions made `vCont' a
71 requirement, so `Hc pPID.TID' is pretty much undefined. So
72 CONT_THREAD can be null_ptid for no `Hc' thread, minus_one_ptid for
73 resuming all threads of the process (again, `Hc' isn't used for
74 multi-process), or a specific thread ptid_t. */
77 /* The thread set with an `Hg' packet. */
78 ptid_t general_thread
;
82 static int extended_protocol
;
83 static int response_needed
;
84 static int exit_requested
;
86 /* --once: Exit after the first connection has closed. */
90 int report_fork_events
;
91 int report_vfork_events
;
92 int report_exec_events
;
93 int report_thread_events
;
95 /* Whether to report TARGET_WAITKING_NO_RESUMED events. */
96 static int report_no_resumed
;
102 /* True if the "vContSupported" feature is active. In that case, GDB
103 wants us to report whether single step is supported in the reply to
105 static int vCont_supported
;
107 /* Whether we should attempt to disable the operating system's address
108 space randomization feature before starting an inferior. */
109 int disable_randomization
= 1;
111 static char *program_name
= NULL
;
112 static std::vector
<char *> program_args
;
113 static std::string wrapper_argv
;
115 int pass_signals
[GDB_SIGNAL_LAST
];
116 int program_signals
[GDB_SIGNAL_LAST
];
117 int program_signals_p
;
119 /* The PID of the originally created or attached inferior. Used to
120 send signals to the process when GDB sends us an asynchronous interrupt
121 (user hitting Control-C in the client), and to wait for the child to exit
122 when no longer debugging it. */
124 unsigned long signal_pid
;
126 /* Set if you want to disable optional thread related packets support
127 in gdbserver, for the sake of testing GDB against stubs that don't
129 int disable_packet_vCont
;
130 int disable_packet_Tthread
;
131 int disable_packet_qC
;
132 int disable_packet_qfThreadInfo
;
134 /* Last status reported to GDB. */
135 struct target_waitstatus last_status
;
139 static unsigned char *mem_buf
;
141 /* A sub-class of 'struct notif_event' for stop, holding information
142 relative to a single stop reply. We keep a queue of these to
143 push to GDB in non-stop mode. */
147 struct notif_event base
;
149 /* Thread or process that got the event. */
153 struct target_waitstatus status
;
156 /* The current btrace configuration. This is gdbserver's mirror of GDB's
157 btrace configuration. */
158 static struct btrace_config current_btrace_conf
;
160 DEFINE_QUEUE_P (notif_event_p
);
162 /* Put a stop reply to the stop reply queue. */
165 queue_stop_reply (ptid_t ptid
, struct target_waitstatus
*status
)
167 struct vstop_notif
*new_notif
= XNEW (struct vstop_notif
);
169 new_notif
->ptid
= ptid
;
170 new_notif
->status
= *status
;
172 notif_event_enque (¬if_stop
, (struct notif_event
*) new_notif
);
176 remove_all_on_match_ptid (QUEUE (notif_event_p
) *q
,
177 QUEUE_ITER (notif_event_p
) *iter
,
178 struct notif_event
*event
,
181 ptid_t filter_ptid
= *(ptid_t
*) data
;
182 struct vstop_notif
*vstop_event
= (struct vstop_notif
*) event
;
184 if (ptid_match (vstop_event
->ptid
, filter_ptid
))
186 if (q
->free_func
!= NULL
)
187 q
->free_func (event
);
189 QUEUE_remove_elem (notif_event_p
, q
, iter
);
198 discard_queued_stop_replies (ptid_t ptid
)
200 QUEUE_iterate (notif_event_p
, notif_stop
.queue
,
201 remove_all_on_match_ptid
, &ptid
);
205 vstop_notif_reply (struct notif_event
*event
, char *own_buf
)
207 struct vstop_notif
*vstop
= (struct vstop_notif
*) event
;
209 prepare_resume_reply (own_buf
, vstop
->ptid
, &vstop
->status
);
212 /* QUEUE_iterate callback helper for in_queued_stop_replies. */
215 in_queued_stop_replies_ptid (QUEUE (notif_event_p
) *q
,
216 QUEUE_ITER (notif_event_p
) *iter
,
217 struct notif_event
*event
,
220 ptid_t filter_ptid
= *(ptid_t
*) data
;
221 struct vstop_notif
*vstop_event
= (struct vstop_notif
*) event
;
223 if (ptid_match (vstop_event
->ptid
, filter_ptid
))
226 /* Don't resume fork children that GDB does not know about yet. */
227 if ((vstop_event
->status
.kind
== TARGET_WAITKIND_FORKED
228 || vstop_event
->status
.kind
== TARGET_WAITKIND_VFORKED
)
229 && ptid_match (vstop_event
->status
.value
.related_pid
, filter_ptid
))
238 in_queued_stop_replies (ptid_t ptid
)
240 return !QUEUE_iterate (notif_event_p
, notif_stop
.queue
,
241 in_queued_stop_replies_ptid
, &ptid
);
244 struct notif_server notif_stop
=
246 "vStopped", "Stop", NULL
, vstop_notif_reply
,
250 target_running (void)
252 return get_first_thread () != NULL
;
255 /* See common/common-inferior.h. */
260 return !wrapper_argv
.empty () ? wrapper_argv
.c_str () : NULL
;
263 /* See common/common-inferior.h. */
266 get_exec_file (int err
)
268 if (err
&& program_name
== NULL
)
269 error (_("No executable file specified."));
283 attach_inferior (int pid
)
285 /* myattach should return -1 if attaching is unsupported,
286 0 if it succeeded, and call error() otherwise. */
288 if (myattach (pid
) != 0)
291 fprintf (stderr
, "Attached; pid = %d\n", pid
);
294 /* FIXME - It may be that we should get the SIGNAL_PID from the
295 attach function, so that it can be the main thread instead of
296 whichever we were told to attach to. */
301 last_ptid
= mywait (pid_to_ptid (pid
), &last_status
, 0, 0);
303 /* GDB knows to ignore the first SIGSTOP after attaching to a running
304 process using the "attach" command, but this is different; it's
305 just using "target remote". Pretend it's just starting up. */
306 if (last_status
.kind
== TARGET_WAITKIND_STOPPED
307 && last_status
.value
.sig
== GDB_SIGNAL_STOP
)
308 last_status
.value
.sig
= GDB_SIGNAL_TRAP
;
310 current_thread
->last_resume_kind
= resume_stop
;
311 current_thread
->last_status
= last_status
;
317 extern int remote_debug
;
319 /* Decode a qXfer read request. Return 0 if everything looks OK,
323 decode_xfer_read (char *buf
, CORE_ADDR
*ofs
, unsigned int *len
)
325 /* After the read marker and annex, qXfer looks like a
326 traditional 'm' packet. */
327 decode_m_packet (buf
, ofs
, len
);
333 decode_xfer (char *buf
, char **object
, char **rw
, char **annex
, char **offset
)
335 /* Extract and NUL-terminate the object. */
337 while (*buf
&& *buf
!= ':')
343 /* Extract and NUL-terminate the read/write action. */
345 while (*buf
&& *buf
!= ':')
351 /* Extract and NUL-terminate the annex. */
353 while (*buf
&& *buf
!= ':')
363 /* Write the response to a successful qXfer read. Returns the
364 length of the (binary) data stored in BUF, corresponding
365 to as much of DATA/LEN as we could fit. IS_MORE controls
366 the first character of the response. */
368 write_qxfer_response (char *buf
, const gdb_byte
*data
, int len
, int is_more
)
377 return remote_escape_output (data
, len
, 1, (unsigned char *) buf
+ 1,
378 &out_len
, PBUFSIZ
- 2) + 1;
381 /* Handle btrace enabling in BTS format. */
384 handle_btrace_enable_bts (struct thread_info
*thread
)
386 if (thread
->btrace
!= NULL
)
387 return "E.Btrace already enabled.";
389 current_btrace_conf
.format
= BTRACE_FORMAT_BTS
;
390 thread
->btrace
= target_enable_btrace (thread
->entry
.id
,
391 ¤t_btrace_conf
);
392 if (thread
->btrace
== NULL
)
393 return "E.Could not enable btrace.";
398 /* Handle btrace enabling in Intel Processor Trace format. */
401 handle_btrace_enable_pt (struct thread_info
*thread
)
403 if (thread
->btrace
!= NULL
)
404 return "E.Btrace already enabled.";
406 current_btrace_conf
.format
= BTRACE_FORMAT_PT
;
407 thread
->btrace
= target_enable_btrace (thread
->entry
.id
,
408 ¤t_btrace_conf
);
409 if (thread
->btrace
== NULL
)
410 return "E.Could not enable btrace.";
415 /* Handle btrace disabling. */
418 handle_btrace_disable (struct thread_info
*thread
)
421 if (thread
->btrace
== NULL
)
422 return "E.Branch tracing not enabled.";
424 if (target_disable_btrace (thread
->btrace
) != 0)
425 return "E.Could not disable branch tracing.";
427 thread
->btrace
= NULL
;
431 /* Handle the "Qbtrace" packet. */
434 handle_btrace_general_set (char *own_buf
)
436 struct thread_info
*thread
;
440 if (!startswith (own_buf
, "Qbtrace:"))
443 op
= own_buf
+ strlen ("Qbtrace:");
445 if (ptid_equal (general_thread
, null_ptid
)
446 || ptid_equal (general_thread
, minus_one_ptid
))
448 strcpy (own_buf
, "E.Must select a single thread.");
452 thread
= find_thread_ptid (general_thread
);
455 strcpy (own_buf
, "E.No such thread.");
461 if (strcmp (op
, "bts") == 0)
462 err
= handle_btrace_enable_bts (thread
);
463 else if (strcmp (op
, "pt") == 0)
464 err
= handle_btrace_enable_pt (thread
);
465 else if (strcmp (op
, "off") == 0)
466 err
= handle_btrace_disable (thread
);
468 err
= "E.Bad Qbtrace operation. Use bts, pt, or off.";
471 strcpy (own_buf
, err
);
478 /* Handle the "Qbtrace-conf" packet. */
481 handle_btrace_conf_general_set (char *own_buf
)
483 struct thread_info
*thread
;
486 if (!startswith (own_buf
, "Qbtrace-conf:"))
489 op
= own_buf
+ strlen ("Qbtrace-conf:");
491 if (ptid_equal (general_thread
, null_ptid
)
492 || ptid_equal (general_thread
, minus_one_ptid
))
494 strcpy (own_buf
, "E.Must select a single thread.");
498 thread
= find_thread_ptid (general_thread
);
501 strcpy (own_buf
, "E.No such thread.");
505 if (startswith (op
, "bts:size="))
511 size
= strtoul (op
+ strlen ("bts:size="), &endp
, 16);
512 if (endp
== NULL
|| *endp
!= 0 || errno
!= 0 || size
> UINT_MAX
)
514 strcpy (own_buf
, "E.Bad size value.");
518 current_btrace_conf
.bts
.size
= (unsigned int) size
;
520 else if (strncmp (op
, "pt:size=", strlen ("pt:size=")) == 0)
526 size
= strtoul (op
+ strlen ("pt:size="), &endp
, 16);
527 if (endp
== NULL
|| *endp
!= 0 || errno
!= 0 || size
> UINT_MAX
)
529 strcpy (own_buf
, "E.Bad size value.");
533 current_btrace_conf
.pt
.size
= (unsigned int) size
;
537 strcpy (own_buf
, "E.Bad Qbtrace configuration option.");
545 /* Handle all of the extended 'Q' packets. */
548 handle_general_set (char *own_buf
)
550 if (startswith (own_buf
, "QPassSignals:"))
552 int numsigs
= (int) GDB_SIGNAL_LAST
, i
;
553 const char *p
= own_buf
+ strlen ("QPassSignals:");
556 p
= decode_address_to_semicolon (&cursig
, p
);
557 for (i
= 0; i
< numsigs
; i
++)
563 /* Keep looping, to clear the remaining signals. */
566 p
= decode_address_to_semicolon (&cursig
, p
);
571 strcpy (own_buf
, "OK");
575 if (startswith (own_buf
, "QProgramSignals:"))
577 int numsigs
= (int) GDB_SIGNAL_LAST
, i
;
578 const char *p
= own_buf
+ strlen ("QProgramSignals:");
581 program_signals_p
= 1;
583 p
= decode_address_to_semicolon (&cursig
, p
);
584 for (i
= 0; i
< numsigs
; i
++)
588 program_signals
[i
] = 1;
590 /* Keep looping, to clear the remaining signals. */
593 p
= decode_address_to_semicolon (&cursig
, p
);
596 program_signals
[i
] = 0;
598 strcpy (own_buf
, "OK");
602 if (startswith (own_buf
, "QCatchSyscalls:"))
604 const char *p
= own_buf
+ sizeof ("QCatchSyscalls:") - 1;
607 struct process_info
*process
;
609 if (!target_running () || !target_supports_catch_syscall ())
615 if (strcmp (p
, "0") == 0)
617 else if (p
[0] == '1' && (p
[1] == ';' || p
[1] == '\0'))
621 fprintf (stderr
, "Unknown catch-syscalls mode requested: %s\n",
627 process
= current_process ();
628 VEC_truncate (int, process
->syscalls_to_catch
, 0);
638 p
= decode_address_to_semicolon (&sysno
, p
);
639 VEC_safe_push (int, process
->syscalls_to_catch
, (int) sysno
);
643 VEC_safe_push (int, process
->syscalls_to_catch
, ANY_SYSCALL
);
650 if (strcmp (own_buf
, "QEnvironmentReset") == 0)
652 our_environ
= gdb_environ::from_host_environ ();
658 if (startswith (own_buf
, "QEnvironmentHexEncoded:"))
660 const char *p
= own_buf
+ sizeof ("QEnvironmentHexEncoded:") - 1;
661 /* The final form of the environment variable. FINAL_VAR will
662 hold the 'VAR=VALUE' format. */
663 std::string final_var
= hex2str (p
);
664 std::string var_name
, var_value
;
668 debug_printf (_("[QEnvironmentHexEncoded received '%s']\n"), p
);
669 debug_printf (_("[Environment variable to be set: '%s']\n"),
674 size_t pos
= final_var
.find ('=');
675 if (pos
== std::string::npos
)
677 warning (_("Unexpected format for environment variable: '%s'"),
683 var_name
= final_var
.substr (0, pos
);
684 var_value
= final_var
.substr (pos
+ 1, std::string::npos
);
686 our_environ
.set (var_name
.c_str (), var_value
.c_str ());
692 if (startswith (own_buf
, "QEnvironmentUnset:"))
694 const char *p
= own_buf
+ sizeof ("QEnvironmentUnset:") - 1;
695 std::string varname
= hex2str (p
);
699 debug_printf (_("[QEnvironmentUnset received '%s']\n"), p
);
700 debug_printf (_("[Environment variable to be unset: '%s']\n"),
705 our_environ
.unset (varname
.c_str ());
711 if (strcmp (own_buf
, "QStartNoAckMode") == 0)
715 debug_printf ("[noack mode enabled]\n");
724 if (startswith (own_buf
, "QNonStop:"))
726 char *mode
= own_buf
+ 9;
730 if (strcmp (mode
, "0") == 0)
732 else if (strcmp (mode
, "1") == 0)
736 /* We don't know what this mode is, so complain to
738 fprintf (stderr
, "Unknown non-stop mode requested: %s\n",
744 req_str
= req
? "non-stop" : "all-stop";
745 if (start_non_stop (req
) != 0)
747 fprintf (stderr
, "Setting %s mode failed\n", req_str
);
755 debug_printf ("[%s mode enabled]\n", req_str
);
761 if (startswith (own_buf
, "QDisableRandomization:"))
763 char *packet
= own_buf
+ strlen ("QDisableRandomization:");
766 unpack_varlen_hex (packet
, &setting
);
767 disable_randomization
= setting
;
771 debug_printf (disable_randomization
772 ? "[address space randomization disabled]\n"
773 : "[address space randomization enabled]\n");
780 if (target_supports_tracepoints ()
781 && handle_tracepoint_general_set (own_buf
))
784 if (startswith (own_buf
, "QAgent:"))
786 char *mode
= own_buf
+ strlen ("QAgent:");
789 if (strcmp (mode
, "0") == 0)
791 else if (strcmp (mode
, "1") == 0)
795 /* We don't know what this value is, so complain to GDB. */
796 sprintf (own_buf
, "E.Unknown QAgent value");
800 /* Update the flag. */
803 debug_printf ("[%s agent]\n", req
? "Enable" : "Disable");
808 if (handle_btrace_general_set (own_buf
))
811 if (handle_btrace_conf_general_set (own_buf
))
814 if (startswith (own_buf
, "QThreadEvents:"))
816 char *mode
= own_buf
+ strlen ("QThreadEvents:");
817 enum tribool req
= TRIBOOL_UNKNOWN
;
819 if (strcmp (mode
, "0") == 0)
821 else if (strcmp (mode
, "1") == 0)
825 char *mode_copy
= xstrdup (mode
);
827 /* We don't know what this mode is, so complain to GDB. */
828 sprintf (own_buf
, "E.Unknown thread-events mode requested: %s\n",
834 report_thread_events
= (req
== TRIBOOL_TRUE
);
838 const char *req_str
= report_thread_events
? "enabled" : "disabled";
840 debug_printf ("[thread events are now %s]\n", req_str
);
847 if (startswith (own_buf
, "QStartupWithShell:"))
849 const char *value
= own_buf
+ strlen ("QStartupWithShell:");
851 if (strcmp (value
, "1") == 0)
852 startup_with_shell
= true;
853 else if (strcmp (value
, "0") == 0)
854 startup_with_shell
= false;
858 fprintf (stderr
, "Unknown value to startup-with-shell: %s\n",
865 debug_printf (_("[Inferior will %s started with shell]"),
866 startup_with_shell
? "be" : "not be");
872 /* Otherwise we didn't know what packet it was. Say we didn't
878 get_features_xml (const char *annex
)
880 const struct target_desc
*desc
= current_target_desc ();
882 /* `desc->xmltarget' defines what to return when looking for the
883 "target.xml" file. Its contents can either be verbatim XML code
884 (prefixed with a '@') or else the name of the actual XML file to
885 be used in place of "target.xml".
887 This variable is set up from the auto-generated
888 init_registers_... routine for the current target. */
890 if (strcmp (annex
, "target.xml") == 0)
892 const char *ret
= tdesc_get_features_xml ((target_desc
*) desc
);
902 extern const char *const xml_builtin
[][2];
905 /* Look for the annex. */
906 for (i
= 0; xml_builtin
[i
][0] != NULL
; i
++)
907 if (strcmp (annex
, xml_builtin
[i
][0]) == 0)
910 if (xml_builtin
[i
][0] != NULL
)
911 return xml_builtin
[i
][1];
919 monitor_show_help (void)
921 monitor_output ("The following monitor commands are supported:\n");
922 monitor_output (" set debug <0|1>\n");
923 monitor_output (" Enable general debugging messages\n");
924 monitor_output (" set debug-hw-points <0|1>\n");
925 monitor_output (" Enable h/w breakpoint/watchpoint debugging messages\n");
926 monitor_output (" set remote-debug <0|1>\n");
927 monitor_output (" Enable remote protocol debugging messages\n");
928 monitor_output (" set debug-format option1[,option2,...]\n");
929 monitor_output (" Add additional information to debugging messages\n");
930 monitor_output (" Options: all, none");
931 monitor_output (", timestamp");
932 monitor_output ("\n");
933 monitor_output (" exit\n");
934 monitor_output (" Quit GDBserver\n");
937 /* Read trace frame or inferior memory. Returns the number of bytes
938 actually read, zero when no further transfer is possible, and -1 on
939 error. Return of a positive value smaller than LEN does not
940 indicate there's no more to be read, only the end of the transfer.
941 E.g., when GDB reads memory from a traceframe, a first request may
942 be served from a memory block that does not cover the whole request
943 length. A following request gets the rest served from either
944 another block (of the same traceframe) or from the read-only
948 gdb_read_memory (CORE_ADDR memaddr
, unsigned char *myaddr
, int len
)
952 if (current_traceframe
>= 0)
955 ULONGEST length
= len
;
957 if (traceframe_read_mem (current_traceframe
,
958 memaddr
, myaddr
, len
, &nbytes
))
960 /* Data read from trace buffer, we're done. */
963 if (!in_readonly_region (memaddr
, length
))
965 /* Otherwise we have a valid readonly case, fall through. */
966 /* (assume no half-trace half-real blocks for now) */
969 res
= prepare_to_access_memory ();
972 if (set_desired_thread (1))
973 res
= read_inferior_memory (memaddr
, myaddr
, len
);
976 done_accessing_memory ();
978 return res
== 0 ? len
: -1;
984 /* Write trace frame or inferior memory. Actually, writing to trace
985 frames is forbidden. */
988 gdb_write_memory (CORE_ADDR memaddr
, const unsigned char *myaddr
, int len
)
990 if (current_traceframe
>= 0)
996 ret
= prepare_to_access_memory ();
999 if (set_desired_thread (1))
1000 ret
= write_inferior_memory (memaddr
, myaddr
, len
);
1003 done_accessing_memory ();
1009 /* Subroutine of handle_search_memory to simplify it. */
1012 handle_search_memory_1 (CORE_ADDR start_addr
, CORE_ADDR search_space_len
,
1013 gdb_byte
*pattern
, unsigned pattern_len
,
1014 gdb_byte
*search_buf
,
1015 unsigned chunk_size
, unsigned search_buf_size
,
1016 CORE_ADDR
*found_addrp
)
1018 /* Prime the search buffer. */
1020 if (gdb_read_memory (start_addr
, search_buf
, search_buf_size
)
1023 warning ("Unable to access %ld bytes of target "
1024 "memory at 0x%lx, halting search.",
1025 (long) search_buf_size
, (long) start_addr
);
1029 /* Perform the search.
1031 The loop is kept simple by allocating [N + pattern-length - 1] bytes.
1032 When we've scanned N bytes we copy the trailing bytes to the start and
1033 read in another N bytes. */
1035 while (search_space_len
>= pattern_len
)
1037 gdb_byte
*found_ptr
;
1038 unsigned nr_search_bytes
= (search_space_len
< search_buf_size
1042 found_ptr
= (gdb_byte
*) memmem (search_buf
, nr_search_bytes
, pattern
,
1045 if (found_ptr
!= NULL
)
1047 CORE_ADDR found_addr
= start_addr
+ (found_ptr
- search_buf
);
1048 *found_addrp
= found_addr
;
1052 /* Not found in this chunk, skip to next chunk. */
1054 /* Don't let search_space_len wrap here, it's unsigned. */
1055 if (search_space_len
>= chunk_size
)
1056 search_space_len
-= chunk_size
;
1058 search_space_len
= 0;
1060 if (search_space_len
>= pattern_len
)
1062 unsigned keep_len
= search_buf_size
- chunk_size
;
1063 CORE_ADDR read_addr
= start_addr
+ chunk_size
+ keep_len
;
1066 /* Copy the trailing part of the previous iteration to the front
1067 of the buffer for the next iteration. */
1068 memcpy (search_buf
, search_buf
+ chunk_size
, keep_len
);
1070 nr_to_read
= (search_space_len
- keep_len
< chunk_size
1071 ? search_space_len
- keep_len
1074 if (gdb_read_memory (read_addr
, search_buf
+ keep_len
,
1075 nr_to_read
) != search_buf_size
)
1077 warning ("Unable to access %ld bytes of target memory "
1078 "at 0x%lx, halting search.",
1079 (long) nr_to_read
, (long) read_addr
);
1083 start_addr
+= chunk_size
;
1092 /* Handle qSearch:memory packets. */
1095 handle_search_memory (char *own_buf
, int packet_len
)
1097 CORE_ADDR start_addr
;
1098 CORE_ADDR search_space_len
;
1100 unsigned int pattern_len
;
1101 /* NOTE: also defined in find.c testcase. */
1102 #define SEARCH_CHUNK_SIZE 16000
1103 const unsigned chunk_size
= SEARCH_CHUNK_SIZE
;
1104 /* Buffer to hold memory contents for searching. */
1105 gdb_byte
*search_buf
;
1106 unsigned search_buf_size
;
1108 CORE_ADDR found_addr
;
1109 int cmd_name_len
= sizeof ("qSearch:memory:") - 1;
1111 pattern
= (gdb_byte
*) malloc (packet_len
);
1112 if (pattern
== NULL
)
1114 error ("Unable to allocate memory to perform the search");
1115 strcpy (own_buf
, "E00");
1118 if (decode_search_memory_packet (own_buf
+ cmd_name_len
,
1119 packet_len
- cmd_name_len
,
1120 &start_addr
, &search_space_len
,
1121 pattern
, &pattern_len
) < 0)
1124 error ("Error in parsing qSearch:memory packet");
1125 strcpy (own_buf
, "E00");
1129 search_buf_size
= chunk_size
+ pattern_len
- 1;
1131 /* No point in trying to allocate a buffer larger than the search space. */
1132 if (search_space_len
< search_buf_size
)
1133 search_buf_size
= search_space_len
;
1135 search_buf
= (gdb_byte
*) malloc (search_buf_size
);
1136 if (search_buf
== NULL
)
1139 error ("Unable to allocate memory to perform the search");
1140 strcpy (own_buf
, "E00");
1144 found
= handle_search_memory_1 (start_addr
, search_space_len
,
1145 pattern
, pattern_len
,
1146 search_buf
, chunk_size
, search_buf_size
,
1150 sprintf (own_buf
, "1,%lx", (long) found_addr
);
1151 else if (found
== 0)
1152 strcpy (own_buf
, "0");
1154 strcpy (own_buf
, "E00");
1160 /* Handle the "D" packet. */
1163 handle_detach (char *own_buf
)
1165 require_running_or_return (own_buf
);
1172 pid
= strtol (&own_buf
[2], NULL
, 16);
1175 pid
= ptid_get_pid (current_ptid
);
1177 if ((tracing
&& disconnected_tracing
) || any_persistent_commands ())
1179 struct process_info
*process
= find_process_pid (pid
);
1181 if (process
== NULL
)
1183 write_enn (own_buf
);
1187 if (tracing
&& disconnected_tracing
)
1189 "Disconnected tracing in effect, "
1190 "leaving gdbserver attached to the process\n");
1192 if (any_persistent_commands ())
1194 "Persistent commands are present, "
1195 "leaving gdbserver attached to the process\n");
1197 /* Make sure we're in non-stop/async mode, so we we can both
1198 wait for an async socket accept, and handle async target
1199 events simultaneously. There's also no point either in
1200 having the target stop all threads, when we're going to
1201 pass signals down without informing GDB. */
1205 debug_printf ("Forcing non-stop mode\n");
1211 process
->gdb_detached
= 1;
1213 /* Detaching implicitly resumes all threads. */
1214 target_continue_no_signal (minus_one_ptid
);
1220 fprintf (stderr
, "Detaching from process %d\n", pid
);
1222 if (detach_inferior (pid
) != 0)
1223 write_enn (own_buf
);
1226 discard_queued_stop_replies (pid_to_ptid (pid
));
1229 if (extended_protocol
|| target_running ())
1231 /* There is still at least one inferior remaining or
1232 we are in extended mode, so don't terminate gdbserver,
1233 and instead treat this like a normal program exit. */
1234 last_status
.kind
= TARGET_WAITKIND_EXITED
;
1235 last_status
.value
.integer
= 0;
1236 last_ptid
= pid_to_ptid (pid
);
1238 current_thread
= NULL
;
1245 /* If we are attached, then we can exit. Otherwise, we
1246 need to hang around doing nothing, until the child is
1248 join_inferior (pid
);
1254 /* Parse options to --debug-format= and "monitor set debug-format".
1255 ARG is the text after "--debug-format=" or "monitor set debug-format".
1256 IS_MONITOR is non-zero if we're invoked via "monitor set debug-format".
1257 This triggers calls to monitor_output.
1258 The result is NULL if all options were parsed ok, otherwise an error
1259 message which the caller must free.
1261 N.B. These commands affect all debug format settings, they are not
1262 cumulative. If a format is not specified, it is turned off.
1263 However, we don't go to extra trouble with things like
1264 "monitor set debug-format all,none,timestamp".
1265 Instead we just parse them one at a time, in order.
1267 The syntax for "monitor set debug" we support here is not identical
1268 to gdb's "set debug foo on|off" because we also use this function to
1269 parse "--debug-format=foo,bar". */
1272 parse_debug_format_options (const char *arg
, int is_monitor
)
1274 VEC (char_ptr
) *options
;
1278 /* First turn all debug format options off. */
1279 debug_timestamp
= 0;
1281 /* First remove leading spaces, for "monitor set debug-format". */
1282 while (isspace (*arg
))
1285 options
= delim_string_to_char_ptr_vec (arg
, ',');
1287 for (ix
= 0; VEC_iterate (char_ptr
, options
, ix
, option
); ++ix
)
1289 if (strcmp (option
, "all") == 0)
1291 debug_timestamp
= 1;
1293 monitor_output ("All extra debug format options enabled.\n");
1295 else if (strcmp (option
, "none") == 0)
1297 debug_timestamp
= 0;
1299 monitor_output ("All extra debug format options disabled.\n");
1301 else if (strcmp (option
, "timestamp") == 0)
1303 debug_timestamp
= 1;
1305 monitor_output ("Timestamps will be added to debug output.\n");
1307 else if (*option
== '\0')
1309 /* An empty option, e.g., "--debug-format=foo,,bar", is ignored. */
1314 char *msg
= xstrprintf ("Unknown debug-format argument: \"%s\"\n",
1317 free_char_ptr_vec (options
);
1322 free_char_ptr_vec (options
);
1326 /* Handle monitor commands not handled by target-specific handlers. */
1329 handle_monitor_command (char *mon
, char *own_buf
)
1331 if (strcmp (mon
, "set debug 1") == 0)
1334 monitor_output ("Debug output enabled.\n");
1336 else if (strcmp (mon
, "set debug 0") == 0)
1339 monitor_output ("Debug output disabled.\n");
1341 else if (strcmp (mon
, "set debug-hw-points 1") == 0)
1343 show_debug_regs
= 1;
1344 monitor_output ("H/W point debugging output enabled.\n");
1346 else if (strcmp (mon
, "set debug-hw-points 0") == 0)
1348 show_debug_regs
= 0;
1349 monitor_output ("H/W point debugging output disabled.\n");
1351 else if (strcmp (mon
, "set remote-debug 1") == 0)
1354 monitor_output ("Protocol debug output enabled.\n");
1356 else if (strcmp (mon
, "set remote-debug 0") == 0)
1359 monitor_output ("Protocol debug output disabled.\n");
1361 else if (startswith (mon
, "set debug-format "))
1364 = parse_debug_format_options (mon
+ sizeof ("set debug-format ") - 1,
1367 if (error_msg
!= NULL
)
1369 monitor_output (error_msg
);
1370 monitor_show_help ();
1371 write_enn (own_buf
);
1375 else if (strcmp (mon
, "help") == 0)
1376 monitor_show_help ();
1377 else if (strcmp (mon
, "exit") == 0)
1381 monitor_output ("Unknown monitor command.\n\n");
1382 monitor_show_help ();
1383 write_enn (own_buf
);
1387 /* Associates a callback with each supported qXfer'able object. */
1391 /* The object this handler handles. */
1394 /* Request that the target transfer up to LEN 8-bit bytes of the
1395 target's OBJECT. The OFFSET, for a seekable object, specifies
1396 the starting point. The ANNEX can be used to provide additional
1397 data-specific information to the target.
1399 Return the number of bytes actually transfered, zero when no
1400 further transfer is possible, -1 on error, -2 when the transfer
1401 is not supported, and -3 on a verbose error message that should
1402 be preserved. Return of a positive value smaller than LEN does
1403 not indicate the end of the object, only the end of the transfer.
1405 One, and only one, of readbuf or writebuf must be non-NULL. */
1406 int (*xfer
) (const char *annex
,
1407 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1408 ULONGEST offset
, LONGEST len
);
1411 /* Handle qXfer:auxv:read. */
1414 handle_qxfer_auxv (const char *annex
,
1415 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1416 ULONGEST offset
, LONGEST len
)
1418 if (the_target
->read_auxv
== NULL
|| writebuf
!= NULL
)
1421 if (annex
[0] != '\0' || current_thread
== NULL
)
1424 return (*the_target
->read_auxv
) (offset
, readbuf
, len
);
1427 /* Handle qXfer:exec-file:read. */
1430 handle_qxfer_exec_file (const char *const_annex
,
1431 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1432 ULONGEST offset
, LONGEST len
)
1438 if (the_target
->pid_to_exec_file
== NULL
|| writebuf
!= NULL
)
1441 if (const_annex
[0] == '\0')
1443 if (current_thread
== NULL
)
1446 pid
= pid_of (current_thread
);
1450 char *annex
= (char *) alloca (strlen (const_annex
) + 1);
1452 strcpy (annex
, const_annex
);
1453 annex
= unpack_varlen_hex (annex
, &pid
);
1455 if (annex
[0] != '\0')
1462 file
= (*the_target
->pid_to_exec_file
) (pid
);
1466 total_len
= strlen (file
);
1468 if (offset
> total_len
)
1471 if (offset
+ len
> total_len
)
1472 len
= total_len
- offset
;
1474 memcpy (readbuf
, file
+ offset
, len
);
1478 /* Handle qXfer:features:read. */
1481 handle_qxfer_features (const char *annex
,
1482 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1483 ULONGEST offset
, LONGEST len
)
1485 const char *document
;
1488 if (writebuf
!= NULL
)
1491 if (!target_running ())
1494 /* Grab the correct annex. */
1495 document
= get_features_xml (annex
);
1496 if (document
== NULL
)
1499 total_len
= strlen (document
);
1501 if (offset
> total_len
)
1504 if (offset
+ len
> total_len
)
1505 len
= total_len
- offset
;
1507 memcpy (readbuf
, document
+ offset
, len
);
1511 /* Worker routine for handle_qxfer_libraries.
1512 Add to the length pointed to by ARG a conservative estimate of the
1513 length needed to transmit the file name of INF. */
1516 accumulate_file_name_length (struct inferior_list_entry
*inf
, void *arg
)
1518 struct dll_info
*dll
= (struct dll_info
*) inf
;
1519 unsigned int *total_len
= (unsigned int *) arg
;
1521 /* Over-estimate the necessary memory. Assume that every character
1522 in the library name must be escaped. */
1523 *total_len
+= 128 + 6 * strlen (dll
->name
);
1526 /* Worker routine for handle_qxfer_libraries.
1527 Emit the XML to describe the library in INF. */
1530 emit_dll_description (struct inferior_list_entry
*inf
, void *arg
)
1532 struct dll_info
*dll
= (struct dll_info
*) inf
;
1533 char **p_ptr
= (char **) arg
;
1537 strcpy (p
, " <library name=\"");
1539 name
= xml_escape_text (dll
->name
);
1543 strcpy (p
, "\"><segment address=\"");
1545 sprintf (p
, "0x%lx", (long) dll
->base_addr
);
1547 strcpy (p
, "\"/></library>\n");
1553 /* Handle qXfer:libraries:read. */
1556 handle_qxfer_libraries (const char *annex
,
1557 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1558 ULONGEST offset
, LONGEST len
)
1560 unsigned int total_len
;
1563 if (writebuf
!= NULL
)
1566 if (annex
[0] != '\0' || current_thread
== NULL
)
1570 for_each_inferior_with_data (&all_dlls
, accumulate_file_name_length
,
1573 document
= (char *) malloc (total_len
);
1574 if (document
== NULL
)
1577 strcpy (document
, "<library-list version=\"1.0\">\n");
1578 p
= document
+ strlen (document
);
1580 for_each_inferior_with_data (&all_dlls
, emit_dll_description
, &p
);
1582 strcpy (p
, "</library-list>\n");
1584 total_len
= strlen (document
);
1586 if (offset
> total_len
)
1592 if (offset
+ len
> total_len
)
1593 len
= total_len
- offset
;
1595 memcpy (readbuf
, document
+ offset
, len
);
1600 /* Handle qXfer:libraries-svr4:read. */
1603 handle_qxfer_libraries_svr4 (const char *annex
,
1604 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1605 ULONGEST offset
, LONGEST len
)
1607 if (writebuf
!= NULL
)
1610 if (current_thread
== NULL
|| the_target
->qxfer_libraries_svr4
== NULL
)
1613 return the_target
->qxfer_libraries_svr4 (annex
, readbuf
, writebuf
, offset
, len
);
1616 /* Handle qXfer:osadata:read. */
1619 handle_qxfer_osdata (const char *annex
,
1620 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1621 ULONGEST offset
, LONGEST len
)
1623 if (the_target
->qxfer_osdata
== NULL
|| writebuf
!= NULL
)
1626 return (*the_target
->qxfer_osdata
) (annex
, readbuf
, NULL
, offset
, len
);
1629 /* Handle qXfer:siginfo:read and qXfer:siginfo:write. */
1632 handle_qxfer_siginfo (const char *annex
,
1633 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1634 ULONGEST offset
, LONGEST len
)
1636 if (the_target
->qxfer_siginfo
== NULL
)
1639 if (annex
[0] != '\0' || current_thread
== NULL
)
1642 return (*the_target
->qxfer_siginfo
) (annex
, readbuf
, writebuf
, offset
, len
);
1645 /* Handle qXfer:spu:read and qXfer:spu:write. */
1648 handle_qxfer_spu (const char *annex
,
1649 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1650 ULONGEST offset
, LONGEST len
)
1652 if (the_target
->qxfer_spu
== NULL
)
1655 if (current_thread
== NULL
)
1658 return (*the_target
->qxfer_spu
) (annex
, readbuf
, writebuf
, offset
, len
);
1661 /* Handle qXfer:statictrace:read. */
1664 handle_qxfer_statictrace (const char *annex
,
1665 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1666 ULONGEST offset
, LONGEST len
)
1670 if (writebuf
!= NULL
)
1673 if (annex
[0] != '\0' || current_thread
== NULL
|| current_traceframe
== -1)
1676 if (traceframe_read_sdata (current_traceframe
, offset
,
1677 readbuf
, len
, &nbytes
))
1682 /* Helper for handle_qxfer_threads_proper.
1683 Emit the XML to describe the thread of INF. */
1686 handle_qxfer_threads_worker (struct inferior_list_entry
*inf
, void *arg
)
1688 struct thread_info
*thread
= (struct thread_info
*) inf
;
1689 struct buffer
*buffer
= (struct buffer
*) arg
;
1690 ptid_t ptid
= ptid_of (thread
);
1692 int core
= target_core_of_thread (ptid
);
1694 const char *name
= target_thread_name (ptid
);
1696 write_ptid (ptid_s
, ptid
);
1698 buffer_xml_printf (buffer
, "<thread id=\"%s\"", ptid_s
);
1702 sprintf (core_s
, "%d", core
);
1703 buffer_xml_printf (buffer
, " core=\"%s\"", core_s
);
1707 buffer_xml_printf (buffer
, " name=\"%s\"", name
);
1709 buffer_xml_printf (buffer
, "/>\n");
1712 /* Helper for handle_qxfer_threads. */
1715 handle_qxfer_threads_proper (struct buffer
*buffer
)
1717 buffer_grow_str (buffer
, "<threads>\n");
1719 for_each_inferior_with_data (&all_threads
, handle_qxfer_threads_worker
,
1722 buffer_grow_str0 (buffer
, "</threads>\n");
1725 /* Handle qXfer:threads:read. */
1728 handle_qxfer_threads (const char *annex
,
1729 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1730 ULONGEST offset
, LONGEST len
)
1732 static char *result
= 0;
1733 static unsigned int result_length
= 0;
1735 if (writebuf
!= NULL
)
1738 if (annex
[0] != '\0')
1743 struct buffer buffer
;
1744 /* When asked for data at offset 0, generate everything and store into
1745 'result'. Successive reads will be served off 'result'. */
1749 buffer_init (&buffer
);
1751 handle_qxfer_threads_proper (&buffer
);
1753 result
= buffer_finish (&buffer
);
1754 result_length
= strlen (result
);
1755 buffer_free (&buffer
);
1758 if (offset
>= result_length
)
1760 /* We're out of data. */
1767 if (len
> result_length
- offset
)
1768 len
= result_length
- offset
;
1770 memcpy (readbuf
, result
+ offset
, len
);
1775 /* Handle qXfer:traceframe-info:read. */
1778 handle_qxfer_traceframe_info (const char *annex
,
1779 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1780 ULONGEST offset
, LONGEST len
)
1782 static char *result
= 0;
1783 static unsigned int result_length
= 0;
1785 if (writebuf
!= NULL
)
1788 if (!target_running () || annex
[0] != '\0' || current_traceframe
== -1)
1793 struct buffer buffer
;
1795 /* When asked for data at offset 0, generate everything and
1796 store into 'result'. Successive reads will be served off
1800 buffer_init (&buffer
);
1802 traceframe_read_info (current_traceframe
, &buffer
);
1804 result
= buffer_finish (&buffer
);
1805 result_length
= strlen (result
);
1806 buffer_free (&buffer
);
1809 if (offset
>= result_length
)
1811 /* We're out of data. */
1818 if (len
> result_length
- offset
)
1819 len
= result_length
- offset
;
1821 memcpy (readbuf
, result
+ offset
, len
);
1825 /* Handle qXfer:fdpic:read. */
1828 handle_qxfer_fdpic (const char *annex
, gdb_byte
*readbuf
,
1829 const gdb_byte
*writebuf
, ULONGEST offset
, LONGEST len
)
1831 if (the_target
->read_loadmap
== NULL
)
1834 if (current_thread
== NULL
)
1837 return (*the_target
->read_loadmap
) (annex
, offset
, readbuf
, len
);
1840 /* Handle qXfer:btrace:read. */
1843 handle_qxfer_btrace (const char *annex
,
1844 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1845 ULONGEST offset
, LONGEST len
)
1847 static struct buffer cache
;
1848 struct thread_info
*thread
;
1849 enum btrace_read_type type
;
1852 if (the_target
->read_btrace
== NULL
|| writebuf
!= NULL
)
1855 if (ptid_equal (general_thread
, null_ptid
)
1856 || ptid_equal (general_thread
, minus_one_ptid
))
1858 strcpy (own_buf
, "E.Must select a single thread.");
1862 thread
= find_thread_ptid (general_thread
);
1865 strcpy (own_buf
, "E.No such thread.");
1869 if (thread
->btrace
== NULL
)
1871 strcpy (own_buf
, "E.Btrace not enabled.");
1875 if (strcmp (annex
, "all") == 0)
1876 type
= BTRACE_READ_ALL
;
1877 else if (strcmp (annex
, "new") == 0)
1878 type
= BTRACE_READ_NEW
;
1879 else if (strcmp (annex
, "delta") == 0)
1880 type
= BTRACE_READ_DELTA
;
1883 strcpy (own_buf
, "E.Bad annex.");
1889 buffer_free (&cache
);
1891 result
= target_read_btrace (thread
->btrace
, &cache
, type
);
1894 memcpy (own_buf
, cache
.buffer
, cache
.used_size
);
1898 else if (offset
> cache
.used_size
)
1900 buffer_free (&cache
);
1904 if (len
> cache
.used_size
- offset
)
1905 len
= cache
.used_size
- offset
;
1907 memcpy (readbuf
, cache
.buffer
+ offset
, len
);
1912 /* Handle qXfer:btrace-conf:read. */
1915 handle_qxfer_btrace_conf (const char *annex
,
1916 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1917 ULONGEST offset
, LONGEST len
)
1919 static struct buffer cache
;
1920 struct thread_info
*thread
;
1923 if (the_target
->read_btrace_conf
== NULL
|| writebuf
!= NULL
)
1926 if (annex
[0] != '\0')
1929 if (ptid_equal (general_thread
, null_ptid
)
1930 || ptid_equal (general_thread
, minus_one_ptid
))
1932 strcpy (own_buf
, "E.Must select a single thread.");
1936 thread
= find_thread_ptid (general_thread
);
1939 strcpy (own_buf
, "E.No such thread.");
1943 if (thread
->btrace
== NULL
)
1945 strcpy (own_buf
, "E.Btrace not enabled.");
1951 buffer_free (&cache
);
1953 result
= target_read_btrace_conf (thread
->btrace
, &cache
);
1956 memcpy (own_buf
, cache
.buffer
, cache
.used_size
);
1960 else if (offset
> cache
.used_size
)
1962 buffer_free (&cache
);
1966 if (len
> cache
.used_size
- offset
)
1967 len
= cache
.used_size
- offset
;
1969 memcpy (readbuf
, cache
.buffer
+ offset
, len
);
1974 static const struct qxfer qxfer_packets
[] =
1976 { "auxv", handle_qxfer_auxv
},
1977 { "btrace", handle_qxfer_btrace
},
1978 { "btrace-conf", handle_qxfer_btrace_conf
},
1979 { "exec-file", handle_qxfer_exec_file
},
1980 { "fdpic", handle_qxfer_fdpic
},
1981 { "features", handle_qxfer_features
},
1982 { "libraries", handle_qxfer_libraries
},
1983 { "libraries-svr4", handle_qxfer_libraries_svr4
},
1984 { "osdata", handle_qxfer_osdata
},
1985 { "siginfo", handle_qxfer_siginfo
},
1986 { "spu", handle_qxfer_spu
},
1987 { "statictrace", handle_qxfer_statictrace
},
1988 { "threads", handle_qxfer_threads
},
1989 { "traceframe-info", handle_qxfer_traceframe_info
},
1993 handle_qxfer (char *own_buf
, int packet_len
, int *new_packet_len_p
)
2001 if (!startswith (own_buf
, "qXfer:"))
2004 /* Grab the object, r/w and annex. */
2005 if (decode_xfer (own_buf
+ 6, &object
, &rw
, &annex
, &offset
) < 0)
2007 write_enn (own_buf
);
2012 i
< sizeof (qxfer_packets
) / sizeof (qxfer_packets
[0]);
2015 const struct qxfer
*q
= &qxfer_packets
[i
];
2017 if (strcmp (object
, q
->object
) == 0)
2019 if (strcmp (rw
, "read") == 0)
2021 unsigned char *data
;
2026 /* Grab the offset and length. */
2027 if (decode_xfer_read (offset
, &ofs
, &len
) < 0)
2029 write_enn (own_buf
);
2033 /* Read one extra byte, as an indicator of whether there is
2035 if (len
> PBUFSIZ
- 2)
2037 data
= (unsigned char *) malloc (len
+ 1);
2040 write_enn (own_buf
);
2043 n
= (*q
->xfer
) (annex
, data
, NULL
, ofs
, len
+ 1);
2051 /* Preserve error message. */
2054 write_enn (own_buf
);
2056 *new_packet_len_p
= write_qxfer_response (own_buf
, data
, len
, 1);
2058 *new_packet_len_p
= write_qxfer_response (own_buf
, data
, n
, 0);
2063 else if (strcmp (rw
, "write") == 0)
2068 unsigned char *data
;
2070 strcpy (own_buf
, "E00");
2071 data
= (unsigned char *) malloc (packet_len
- (offset
- own_buf
));
2074 write_enn (own_buf
);
2077 if (decode_xfer_write (offset
, packet_len
- (offset
- own_buf
),
2078 &ofs
, &len
, data
) < 0)
2081 write_enn (own_buf
);
2085 n
= (*q
->xfer
) (annex
, NULL
, data
, ofs
, len
);
2093 /* Preserve error message. */
2096 write_enn (own_buf
);
2098 sprintf (own_buf
, "%x", n
);
2111 /* Compute 32 bit CRC from inferior memory.
2113 On success, return 32 bit CRC.
2114 On failure, return (unsigned long long) -1. */
2116 static unsigned long long
2117 crc32 (CORE_ADDR base
, int len
, unsigned int crc
)
2121 unsigned char byte
= 0;
2123 /* Return failure if memory read fails. */
2124 if (read_inferior_memory (base
, &byte
, 1) != 0)
2125 return (unsigned long long) -1;
2127 crc
= xcrc32 (&byte
, 1, crc
);
2130 return (unsigned long long) crc
;
2133 /* Add supported btrace packets to BUF. */
2136 supported_btrace_packets (char *buf
)
2138 int btrace_supported
= 0;
2140 if (target_supports_btrace (BTRACE_FORMAT_BTS
))
2142 strcat (buf
, ";Qbtrace:bts+");
2143 strcat (buf
, ";Qbtrace-conf:bts:size+");
2145 btrace_supported
= 1;
2148 if (target_supports_btrace (BTRACE_FORMAT_PT
))
2150 strcat (buf
, ";Qbtrace:pt+");
2151 strcat (buf
, ";Qbtrace-conf:pt:size+");
2153 btrace_supported
= 1;
2156 if (!btrace_supported
)
2159 strcat (buf
, ";Qbtrace:off+");
2160 strcat (buf
, ";qXfer:btrace:read+");
2161 strcat (buf
, ";qXfer:btrace-conf:read+");
2164 /* Handle all of the extended 'q' packets. */
2167 handle_query (char *own_buf
, int packet_len
, int *new_packet_len_p
)
2169 static struct inferior_list_entry
*thread_ptr
;
2171 /* Reply the current thread id. */
2172 if (strcmp ("qC", own_buf
) == 0 && !disable_packet_qC
)
2175 require_running_or_return (own_buf
);
2177 if (general_thread
!= null_ptid
&& general_thread
!= minus_one_ptid
)
2178 ptid
= general_thread
;
2181 thread_ptr
= get_first_inferior (&all_threads
);
2182 ptid
= thread_ptr
->id
;
2185 sprintf (own_buf
, "QC");
2187 write_ptid (own_buf
, ptid
);
2191 if (strcmp ("qSymbol::", own_buf
) == 0)
2193 struct thread_info
*save_thread
= current_thread
;
2195 /* For qSymbol, GDB only changes the current thread if the
2196 previous current thread was of a different process. So if
2197 the previous thread is gone, we need to pick another one of
2198 the same process. This can happen e.g., if we followed an
2199 exec in a non-leader thread. */
2200 if (current_thread
== NULL
)
2203 = find_any_thread_of_pid (ptid_get_pid (general_thread
));
2205 /* Just in case, if we didn't find a thread, then bail out
2206 instead of crashing. */
2207 if (current_thread
== NULL
)
2209 write_enn (own_buf
);
2210 current_thread
= save_thread
;
2215 /* GDB is suggesting new symbols have been loaded. This may
2216 mean a new shared library has been detected as loaded, so
2217 take the opportunity to check if breakpoints we think are
2218 inserted, still are. Note that it isn't guaranteed that
2219 we'll see this when a shared library is loaded, and nor will
2220 we see this for unloads (although breakpoints in unloaded
2221 libraries shouldn't trigger), as GDB may not find symbols for
2222 the library at all. We also re-validate breakpoints when we
2223 see a second GDB breakpoint for the same address, and or when
2224 we access breakpoint shadows. */
2225 validate_breakpoints ();
2227 if (target_supports_tracepoints ())
2228 tracepoint_look_up_symbols ();
2230 if (current_thread
!= NULL
&& the_target
->look_up_symbols
!= NULL
)
2231 (*the_target
->look_up_symbols
) ();
2233 current_thread
= save_thread
;
2235 strcpy (own_buf
, "OK");
2239 if (!disable_packet_qfThreadInfo
)
2241 if (strcmp ("qfThreadInfo", own_buf
) == 0)
2243 require_running_or_return (own_buf
);
2244 thread_ptr
= get_first_inferior (&all_threads
);
2247 write_ptid (own_buf
, thread_ptr
->id
);
2248 thread_ptr
= thread_ptr
->next
;
2252 if (strcmp ("qsThreadInfo", own_buf
) == 0)
2254 require_running_or_return (own_buf
);
2255 if (thread_ptr
!= NULL
)
2258 write_ptid (own_buf
, thread_ptr
->id
);
2259 thread_ptr
= thread_ptr
->next
;
2264 sprintf (own_buf
, "l");
2270 if (the_target
->read_offsets
!= NULL
2271 && strcmp ("qOffsets", own_buf
) == 0)
2273 CORE_ADDR text
, data
;
2275 require_running_or_return (own_buf
);
2276 if (the_target
->read_offsets (&text
, &data
))
2277 sprintf (own_buf
, "Text=%lX;Data=%lX;Bss=%lX",
2278 (long)text
, (long)data
, (long)data
);
2280 write_enn (own_buf
);
2285 /* Protocol features query. */
2286 if (startswith (own_buf
, "qSupported")
2287 && (own_buf
[10] == ':' || own_buf
[10] == '\0'))
2289 char *p
= &own_buf
[10];
2290 int gdb_supports_qRelocInsn
= 0;
2292 /* Process each feature being provided by GDB. The first
2293 feature will follow a ':', and latter features will follow
2297 char **qsupported
= NULL
;
2302 /* Two passes, to avoid nested strtok calls in
2303 target_process_qsupported. */
2304 for (p
= strtok (p
+ 1, ";");
2306 p
= strtok (NULL
, ";"))
2309 qsupported
= XRESIZEVEC (char *, qsupported
, count
);
2310 qsupported
[count
- 1] = xstrdup (p
);
2313 for (i
= 0; i
< count
; i
++)
2316 if (strcmp (p
, "multiprocess+") == 0)
2318 /* GDB supports and wants multi-process support if
2320 if (target_supports_multi_process ())
2323 else if (strcmp (p
, "qRelocInsn+") == 0)
2325 /* GDB supports relocate instruction requests. */
2326 gdb_supports_qRelocInsn
= 1;
2328 else if (strcmp (p
, "swbreak+") == 0)
2330 /* GDB wants us to report whether a trap is caused
2331 by a software breakpoint and for us to handle PC
2332 adjustment if necessary on this target. */
2333 if (target_supports_stopped_by_sw_breakpoint ())
2334 swbreak_feature
= 1;
2336 else if (strcmp (p
, "hwbreak+") == 0)
2338 /* GDB wants us to report whether a trap is caused
2339 by a hardware breakpoint. */
2340 if (target_supports_stopped_by_hw_breakpoint ())
2341 hwbreak_feature
= 1;
2343 else if (strcmp (p
, "fork-events+") == 0)
2345 /* GDB supports and wants fork events if possible. */
2346 if (target_supports_fork_events ())
2347 report_fork_events
= 1;
2349 else if (strcmp (p
, "vfork-events+") == 0)
2351 /* GDB supports and wants vfork events if possible. */
2352 if (target_supports_vfork_events ())
2353 report_vfork_events
= 1;
2355 else if (strcmp (p
, "exec-events+") == 0)
2357 /* GDB supports and wants exec events if possible. */
2358 if (target_supports_exec_events ())
2359 report_exec_events
= 1;
2361 else if (strcmp (p
, "vContSupported+") == 0)
2362 vCont_supported
= 1;
2363 else if (strcmp (p
, "QThreadEvents+") == 0)
2365 else if (strcmp (p
, "no-resumed+") == 0)
2367 /* GDB supports and wants TARGET_WAITKIND_NO_RESUMED
2369 report_no_resumed
= 1;
2373 /* Move the unknown features all together. */
2374 qsupported
[i
] = NULL
;
2375 qsupported
[unknown
] = p
;
2380 /* Give the target backend a chance to process the unknown
2382 target_process_qsupported (qsupported
, unknown
);
2384 for (i
= 0; i
< count
; i
++)
2385 free (qsupported
[i
]);
2390 "PacketSize=%x;QPassSignals+;QProgramSignals+;"
2391 "QStartupWithShell+;QEnvironmentHexEncoded+;"
2392 "QEnvironmentReset+;QEnvironmentUnset+",
2395 if (target_supports_catch_syscall ())
2396 strcat (own_buf
, ";QCatchSyscalls+");
2398 if (the_target
->qxfer_libraries_svr4
!= NULL
)
2399 strcat (own_buf
, ";qXfer:libraries-svr4:read+"
2400 ";augmented-libraries-svr4-read+");
2403 /* We do not have any hook to indicate whether the non-SVR4 target
2404 backend supports qXfer:libraries:read, so always report it. */
2405 strcat (own_buf
, ";qXfer:libraries:read+");
2408 if (the_target
->read_auxv
!= NULL
)
2409 strcat (own_buf
, ";qXfer:auxv:read+");
2411 if (the_target
->qxfer_spu
!= NULL
)
2412 strcat (own_buf
, ";qXfer:spu:read+;qXfer:spu:write+");
2414 if (the_target
->qxfer_siginfo
!= NULL
)
2415 strcat (own_buf
, ";qXfer:siginfo:read+;qXfer:siginfo:write+");
2417 if (the_target
->read_loadmap
!= NULL
)
2418 strcat (own_buf
, ";qXfer:fdpic:read+");
2420 /* We always report qXfer:features:read, as targets may
2421 install XML files on a subsequent call to arch_setup.
2422 If we reported to GDB on startup that we don't support
2423 qXfer:feature:read at all, we will never be re-queried. */
2424 strcat (own_buf
, ";qXfer:features:read+");
2426 if (transport_is_reliable
)
2427 strcat (own_buf
, ";QStartNoAckMode+");
2429 if (the_target
->qxfer_osdata
!= NULL
)
2430 strcat (own_buf
, ";qXfer:osdata:read+");
2432 if (target_supports_multi_process ())
2433 strcat (own_buf
, ";multiprocess+");
2435 if (target_supports_fork_events ())
2436 strcat (own_buf
, ";fork-events+");
2438 if (target_supports_vfork_events ())
2439 strcat (own_buf
, ";vfork-events+");
2441 if (target_supports_exec_events ())
2442 strcat (own_buf
, ";exec-events+");
2444 if (target_supports_non_stop ())
2445 strcat (own_buf
, ";QNonStop+");
2447 if (target_supports_disable_randomization ())
2448 strcat (own_buf
, ";QDisableRandomization+");
2450 strcat (own_buf
, ";qXfer:threads:read+");
2452 if (target_supports_tracepoints ())
2454 strcat (own_buf
, ";ConditionalTracepoints+");
2455 strcat (own_buf
, ";TraceStateVariables+");
2456 strcat (own_buf
, ";TracepointSource+");
2457 strcat (own_buf
, ";DisconnectedTracing+");
2458 if (gdb_supports_qRelocInsn
&& target_supports_fast_tracepoints ())
2459 strcat (own_buf
, ";FastTracepoints+");
2460 strcat (own_buf
, ";StaticTracepoints+");
2461 strcat (own_buf
, ";InstallInTrace+");
2462 strcat (own_buf
, ";qXfer:statictrace:read+");
2463 strcat (own_buf
, ";qXfer:traceframe-info:read+");
2464 strcat (own_buf
, ";EnableDisableTracepoints+");
2465 strcat (own_buf
, ";QTBuffer:size+");
2466 strcat (own_buf
, ";tracenz+");
2469 if (target_supports_hardware_single_step ()
2470 || target_supports_software_single_step () )
2472 strcat (own_buf
, ";ConditionalBreakpoints+");
2474 strcat (own_buf
, ";BreakpointCommands+");
2476 if (target_supports_agent ())
2477 strcat (own_buf
, ";QAgent+");
2479 supported_btrace_packets (own_buf
);
2481 if (target_supports_stopped_by_sw_breakpoint ())
2482 strcat (own_buf
, ";swbreak+");
2484 if (target_supports_stopped_by_hw_breakpoint ())
2485 strcat (own_buf
, ";hwbreak+");
2487 if (the_target
->pid_to_exec_file
!= NULL
)
2488 strcat (own_buf
, ";qXfer:exec-file:read+");
2490 strcat (own_buf
, ";vContSupported+");
2492 strcat (own_buf
, ";QThreadEvents+");
2494 strcat (own_buf
, ";no-resumed+");
2496 /* Reinitialize components as needed for the new connection. */
2497 hostio_handle_new_gdb_connection ();
2498 target_handle_new_gdb_connection ();
2503 /* Thread-local storage support. */
2504 if (the_target
->get_tls_address
!= NULL
2505 && startswith (own_buf
, "qGetTLSAddr:"))
2507 char *p
= own_buf
+ 12;
2508 CORE_ADDR parts
[2], address
= 0;
2510 ptid_t ptid
= null_ptid
;
2512 require_running_or_return (own_buf
);
2514 for (i
= 0; i
< 3; i
++)
2522 p2
= strchr (p
, ',');
2535 ptid
= read_ptid (p
, NULL
);
2537 decode_address (&parts
[i
- 1], p
, len
);
2541 if (p
!= NULL
|| i
< 3)
2545 struct thread_info
*thread
= find_thread_ptid (ptid
);
2550 err
= the_target
->get_tls_address (thread
, parts
[0], parts
[1],
2556 strcpy (own_buf
, paddress(address
));
2561 write_enn (own_buf
);
2565 /* Otherwise, pretend we do not understand this packet. */
2568 /* Windows OS Thread Information Block address support. */
2569 if (the_target
->get_tib_address
!= NULL
2570 && startswith (own_buf
, "qGetTIBAddr:"))
2575 ptid_t ptid
= read_ptid (own_buf
+ 12, &annex
);
2577 n
= (*the_target
->get_tib_address
) (ptid
, &tlb
);
2580 strcpy (own_buf
, paddress(tlb
));
2585 write_enn (own_buf
);
2591 /* Handle "monitor" commands. */
2592 if (startswith (own_buf
, "qRcmd,"))
2594 char *mon
= (char *) malloc (PBUFSIZ
);
2595 int len
= strlen (own_buf
+ 6);
2599 write_enn (own_buf
);
2604 || hex2bin (own_buf
+ 6, (gdb_byte
*) mon
, len
/ 2) != len
/ 2)
2606 write_enn (own_buf
);
2610 mon
[len
/ 2] = '\0';
2614 if (the_target
->handle_monitor_command
== NULL
2615 || (*the_target
->handle_monitor_command
) (mon
) == 0)
2616 /* Default processing. */
2617 handle_monitor_command (mon
, own_buf
);
2623 if (startswith (own_buf
, "qSearch:memory:"))
2625 require_running_or_return (own_buf
);
2626 handle_search_memory (own_buf
, packet_len
);
2630 if (strcmp (own_buf
, "qAttached") == 0
2631 || startswith (own_buf
, "qAttached:"))
2633 struct process_info
*process
;
2635 if (own_buf
[sizeof ("qAttached") - 1])
2637 int pid
= strtoul (own_buf
+ sizeof ("qAttached:") - 1, NULL
, 16);
2638 process
= (struct process_info
*)
2639 find_inferior_id (&all_processes
, pid_to_ptid (pid
));
2643 require_running_or_return (own_buf
);
2644 process
= current_process ();
2647 if (process
== NULL
)
2649 write_enn (own_buf
);
2653 strcpy (own_buf
, process
->attached
? "1" : "0");
2657 if (startswith (own_buf
, "qCRC:"))
2659 /* CRC check (compare-section). */
2663 unsigned long long crc
;
2665 require_running_or_return (own_buf
);
2666 comma
= unpack_varlen_hex (own_buf
+ 5, &base
);
2667 if (*comma
++ != ',')
2669 write_enn (own_buf
);
2672 len
= strtoul (comma
, NULL
, 16);
2673 crc
= crc32 (base
, len
, 0xffffffff);
2674 /* Check for memory failure. */
2675 if (crc
== (unsigned long long) -1)
2677 write_enn (own_buf
);
2680 sprintf (own_buf
, "C%lx", (unsigned long) crc
);
2684 if (handle_qxfer (own_buf
, packet_len
, new_packet_len_p
))
2687 if (target_supports_tracepoints () && handle_tracepoint_query (own_buf
))
2690 /* Otherwise we didn't know what packet it was. Say we didn't
2695 static void gdb_wants_all_threads_stopped (void);
2696 static void resume (struct thread_resume
*actions
, size_t n
);
2698 /* The callback that is passed to visit_actioned_threads. */
2699 typedef int (visit_actioned_threads_callback_ftype
)
2700 (const struct thread_resume
*, struct thread_info
*);
2702 /* Struct to pass data to visit_actioned_threads. */
2704 struct visit_actioned_threads_data
2706 const struct thread_resume
*actions
;
2708 visit_actioned_threads_callback_ftype
*callback
;
2711 /* Call CALLBACK for any thread to which ACTIONS applies to. Returns
2712 true if CALLBACK returns true. Returns false if no matching thread
2713 is found or CALLBACK results false.
2714 Note: This function is itself a callback for find_inferior. */
2717 visit_actioned_threads (struct inferior_list_entry
*entry
, void *datap
)
2719 struct visit_actioned_threads_data
*data
2720 = (struct visit_actioned_threads_data
*) datap
;
2721 const struct thread_resume
*actions
= data
->actions
;
2722 size_t num_actions
= data
->num_actions
;
2723 visit_actioned_threads_callback_ftype
*callback
= data
->callback
;
2726 for (i
= 0; i
< num_actions
; i
++)
2728 const struct thread_resume
*action
= &actions
[i
];
2730 if (ptid_equal (action
->thread
, minus_one_ptid
)
2731 || ptid_equal (action
->thread
, entry
->id
)
2732 || ((ptid_get_pid (action
->thread
)
2733 == ptid_get_pid (entry
->id
))
2734 && ptid_get_lwp (action
->thread
) == -1))
2736 struct thread_info
*thread
= (struct thread_info
*) entry
;
2738 if ((*callback
) (action
, thread
))
2746 /* Callback for visit_actioned_threads. If the thread has a pending
2747 status to report, report it now. */
2750 handle_pending_status (const struct thread_resume
*resumption
,
2751 struct thread_info
*thread
)
2753 if (thread
->status_pending_p
)
2755 thread
->status_pending_p
= 0;
2757 last_status
= thread
->last_status
;
2758 last_ptid
= thread
->entry
.id
;
2759 prepare_resume_reply (own_buf
, last_ptid
, &last_status
);
2765 /* Parse vCont packets. */
2767 handle_v_cont (char *own_buf
)
2771 struct thread_resume
*resume_info
;
2772 struct thread_resume default_action
{ null_ptid
};
2774 /* Count the number of semicolons in the packet. There should be one
2775 for every action. */
2781 p
= strchr (p
, ';');
2784 resume_info
= (struct thread_resume
*) malloc (n
* sizeof (resume_info
[0]));
2785 if (resume_info
== NULL
)
2793 memset (&resume_info
[i
], 0, sizeof resume_info
[i
]);
2795 if (p
[0] == 's' || p
[0] == 'S')
2796 resume_info
[i
].kind
= resume_step
;
2797 else if (p
[0] == 'r')
2798 resume_info
[i
].kind
= resume_step
;
2799 else if (p
[0] == 'c' || p
[0] == 'C')
2800 resume_info
[i
].kind
= resume_continue
;
2801 else if (p
[0] == 't')
2802 resume_info
[i
].kind
= resume_stop
;
2806 if (p
[0] == 'S' || p
[0] == 'C')
2809 sig
= strtol (p
+ 1, &q
, 16);
2814 if (!gdb_signal_to_host_p ((enum gdb_signal
) sig
))
2816 resume_info
[i
].sig
= gdb_signal_to_host ((enum gdb_signal
) sig
);
2818 else if (p
[0] == 'r')
2822 p
= unpack_varlen_hex (p
+ 1, &addr
);
2823 resume_info
[i
].step_range_start
= addr
;
2828 p
= unpack_varlen_hex (p
+ 1, &addr
);
2829 resume_info
[i
].step_range_end
= addr
;
2838 resume_info
[i
].thread
= minus_one_ptid
;
2839 default_action
= resume_info
[i
];
2841 /* Note: we don't increment i here, we'll overwrite this entry
2842 the next time through. */
2844 else if (p
[0] == ':')
2846 ptid_t ptid
= read_ptid (p
+ 1, &q
);
2851 if (p
[0] != ';' && p
[0] != 0)
2854 resume_info
[i
].thread
= ptid
;
2861 resume_info
[i
] = default_action
;
2863 resume (resume_info
, n
);
2868 write_enn (own_buf
);
2873 /* Resume target with ACTIONS, an array of NUM_ACTIONS elements. */
2876 resume (struct thread_resume
*actions
, size_t num_actions
)
2880 /* Check if among the threads that GDB wants actioned, there's
2881 one with a pending status to report. If so, skip actually
2882 resuming/stopping and report the pending event
2884 struct visit_actioned_threads_data data
;
2886 data
.actions
= actions
;
2887 data
.num_actions
= num_actions
;
2888 data
.callback
= handle_pending_status
;
2889 if (find_inferior (&all_threads
, visit_actioned_threads
, &data
) != NULL
)
2895 (*the_target
->resume
) (actions
, num_actions
);
2901 last_ptid
= mywait (minus_one_ptid
, &last_status
, 0, 1);
2903 if (last_status
.kind
== TARGET_WAITKIND_NO_RESUMED
2904 && !report_no_resumed
)
2906 /* The client does not support this stop reply. At least
2908 sprintf (own_buf
, "E.No unwaited-for children left.");
2909 disable_async_io ();
2913 if (last_status
.kind
!= TARGET_WAITKIND_EXITED
2914 && last_status
.kind
!= TARGET_WAITKIND_SIGNALLED
2915 && last_status
.kind
!= TARGET_WAITKIND_NO_RESUMED
)
2916 current_thread
->last_status
= last_status
;
2918 /* From the client's perspective, all-stop mode always stops all
2919 threads implicitly (and the target backend has already done
2920 so by now). Tag all threads as "want-stopped", so we don't
2921 resume them implicitly without the client telling us to. */
2922 gdb_wants_all_threads_stopped ();
2923 prepare_resume_reply (own_buf
, last_ptid
, &last_status
);
2924 disable_async_io ();
2926 if (last_status
.kind
== TARGET_WAITKIND_EXITED
2927 || last_status
.kind
== TARGET_WAITKIND_SIGNALLED
)
2928 target_mourn_inferior (last_ptid
);
2932 /* Attach to a new program. Return 1 if successful, 0 if failure. */
2934 handle_v_attach (char *own_buf
)
2938 pid
= strtol (own_buf
+ 8, NULL
, 16);
2939 if (pid
!= 0 && attach_inferior (pid
) == 0)
2941 /* Don't report shared library events after attaching, even if
2942 some libraries are preloaded. GDB will always poll the
2943 library list. Avoids the "stopped by shared library event"
2944 notice on the GDB side. */
2949 /* In non-stop, we don't send a resume reply. Stop events
2950 will follow up using the normal notification
2955 prepare_resume_reply (own_buf
, last_ptid
, &last_status
);
2961 write_enn (own_buf
);
2966 /* Run a new program. Return 1 if successful, 0 if failure. */
2968 handle_v_run (char *own_buf
)
2971 std::vector
<char *> new_argv
;
2972 char *new_program_name
= NULL
;
2976 for (p
= own_buf
+ strlen ("vRun;"); p
&& *p
; p
= strchr (p
, ';'))
2982 for (i
= 0, p
= own_buf
+ strlen ("vRun;"); *p
; p
= next_p
, ++i
)
2984 next_p
= strchr (p
, ';');
2986 next_p
= p
+ strlen (p
);
2988 if (i
== 0 && p
== next_p
)
2990 /* No program specified. */
2991 new_program_name
= NULL
;
2993 else if (p
== next_p
)
2995 /* Empty argument. */
2996 new_argv
.push_back (xstrdup ("''"));
3000 size_t len
= (next_p
- p
) / 2;
3001 /* ARG is the unquoted argument received via the RSP. */
3002 char *arg
= (char *) xmalloc (len
+ 1);
3003 /* FULL_ARGS will contain the quoted version of ARG. */
3004 char *full_arg
= (char *) xmalloc ((len
+ 1) * 2);
3005 /* These are pointers used to navigate the strings above. */
3006 char *tmp_arg
= arg
;
3007 char *tmp_full_arg
= full_arg
;
3010 hex2bin (p
, (gdb_byte
*) arg
, len
);
3013 while (*tmp_arg
!= '\0')
3019 *tmp_full_arg
= '\'';
3025 /* Quote single quote. */
3026 *tmp_full_arg
= '\\';
3034 *tmp_full_arg
= *tmp_arg
;
3040 *tmp_full_arg
++ = '\'';
3042 /* Finish FULL_ARG and push it into the vector containing
3044 *tmp_full_arg
= '\0';
3046 new_program_name
= full_arg
;
3048 new_argv
.push_back (full_arg
);
3054 new_argv
.push_back (NULL
);
3056 if (new_program_name
== NULL
)
3058 /* GDB didn't specify a program to run. Use the program from the
3059 last run with the new argument list. */
3060 if (program_name
== NULL
)
3062 write_enn (own_buf
);
3063 free_vector_argv (new_argv
);
3069 xfree (program_name
);
3070 program_name
= new_program_name
;
3073 /* Free the old argv and install the new one. */
3074 free_vector_argv (program_args
);
3075 program_args
= new_argv
;
3077 create_inferior (program_name
, program_args
);
3079 if (last_status
.kind
== TARGET_WAITKIND_STOPPED
)
3081 prepare_resume_reply (own_buf
, last_ptid
, &last_status
);
3083 /* In non-stop, sending a resume reply doesn't set the general
3084 thread, but GDB assumes a vRun sets it (this is so GDB can
3085 query which is the main thread of the new inferior. */
3087 general_thread
= last_ptid
;
3093 write_enn (own_buf
);
3098 /* Kill process. Return 1 if successful, 0 if failure. */
3100 handle_v_kill (char *own_buf
)
3103 char *p
= &own_buf
[6];
3105 pid
= strtol (p
, NULL
, 16);
3108 if (pid
!= 0 && kill_inferior (pid
) == 0)
3110 last_status
.kind
= TARGET_WAITKIND_SIGNALLED
;
3111 last_status
.value
.sig
= GDB_SIGNAL_KILL
;
3112 last_ptid
= pid_to_ptid (pid
);
3113 discard_queued_stop_replies (last_ptid
);
3119 write_enn (own_buf
);
3124 /* Handle all of the extended 'v' packets. */
3126 handle_v_requests (char *own_buf
, int packet_len
, int *new_packet_len
)
3128 if (!disable_packet_vCont
)
3130 if (strcmp (own_buf
, "vCtrlC") == 0)
3132 (*the_target
->request_interrupt
) ();
3137 if (startswith (own_buf
, "vCont;"))
3139 handle_v_cont (own_buf
);
3143 if (startswith (own_buf
, "vCont?"))
3145 strcpy (own_buf
, "vCont;c;C;t");
3147 if (target_supports_hardware_single_step ()
3148 || target_supports_software_single_step ()
3149 || !vCont_supported
)
3151 /* If target supports single step either by hardware or by
3152 software, add actions s and S to the list of supported
3153 actions. On the other hand, if GDB doesn't request the
3154 supported vCont actions in qSupported packet, add s and
3155 S to the list too. */
3156 own_buf
= own_buf
+ strlen (own_buf
);
3157 strcpy (own_buf
, ";s;S");
3160 if (target_supports_range_stepping ())
3162 own_buf
= own_buf
+ strlen (own_buf
);
3163 strcpy (own_buf
, ";r");
3169 if (startswith (own_buf
, "vFile:")
3170 && handle_vFile (own_buf
, packet_len
, new_packet_len
))
3173 if (startswith (own_buf
, "vAttach;"))
3175 if ((!extended_protocol
|| !multi_process
) && target_running ())
3177 fprintf (stderr
, "Already debugging a process\n");
3178 write_enn (own_buf
);
3181 handle_v_attach (own_buf
);
3185 if (startswith (own_buf
, "vRun;"))
3187 if ((!extended_protocol
|| !multi_process
) && target_running ())
3189 fprintf (stderr
, "Already debugging a process\n");
3190 write_enn (own_buf
);
3193 handle_v_run (own_buf
);
3197 if (startswith (own_buf
, "vKill;"))
3199 if (!target_running ())
3201 fprintf (stderr
, "No process to kill\n");
3202 write_enn (own_buf
);
3205 handle_v_kill (own_buf
);
3209 if (handle_notif_ack (own_buf
, packet_len
))
3212 /* Otherwise we didn't know what packet it was. Say we didn't
3218 /* Resume thread and wait for another event. In non-stop mode,
3219 don't really wait here, but return immediatelly to the event
3222 myresume (char *own_buf
, int step
, int sig
)
3224 struct thread_resume resume_info
[2];
3226 int valid_cont_thread
;
3228 valid_cont_thread
= (!ptid_equal (cont_thread
, null_ptid
)
3229 && !ptid_equal (cont_thread
, minus_one_ptid
));
3231 if (step
|| sig
|| valid_cont_thread
)
3233 resume_info
[0].thread
= current_ptid
;
3235 resume_info
[0].kind
= resume_step
;
3237 resume_info
[0].kind
= resume_continue
;
3238 resume_info
[0].sig
= sig
;
3242 if (!valid_cont_thread
)
3244 resume_info
[n
].thread
= minus_one_ptid
;
3245 resume_info
[n
].kind
= resume_continue
;
3246 resume_info
[n
].sig
= 0;
3250 resume (resume_info
, n
);
3253 /* Callback for for_each_inferior. Make a new stop reply for each
3257 queue_stop_reply_callback (struct inferior_list_entry
*entry
, void *arg
)
3259 struct thread_info
*thread
= (struct thread_info
*) entry
;
3261 /* For now, assume targets that don't have this callback also don't
3262 manage the thread's last_status field. */
3263 if (the_target
->thread_stopped
== NULL
)
3265 struct vstop_notif
*new_notif
= XNEW (struct vstop_notif
);
3267 new_notif
->ptid
= entry
->id
;
3268 new_notif
->status
= thread
->last_status
;
3269 /* Pass the last stop reply back to GDB, but don't notify
3271 notif_event_enque (¬if_stop
,
3272 (struct notif_event
*) new_notif
);
3276 if (thread_stopped (thread
))
3280 std::string status_string
3281 = target_waitstatus_to_string (&thread
->last_status
);
3283 debug_printf ("Reporting thread %s as already stopped with %s\n",
3284 target_pid_to_str (entry
->id
),
3285 status_string
.c_str ());
3288 gdb_assert (thread
->last_status
.kind
!= TARGET_WAITKIND_IGNORE
);
3290 /* Pass the last stop reply back to GDB, but don't notify
3292 queue_stop_reply (entry
->id
, &thread
->last_status
);
3299 /* Set this inferior threads's state as "want-stopped". We won't
3300 resume this thread until the client gives us another action for
3304 gdb_wants_thread_stopped (struct inferior_list_entry
*entry
)
3306 struct thread_info
*thread
= (struct thread_info
*) entry
;
3308 thread
->last_resume_kind
= resume_stop
;
3310 if (thread
->last_status
.kind
== TARGET_WAITKIND_IGNORE
)
3312 /* Most threads are stopped implicitly (all-stop); tag that with
3314 thread
->last_status
.kind
= TARGET_WAITKIND_STOPPED
;
3315 thread
->last_status
.value
.sig
= GDB_SIGNAL_0
;
3319 /* Set all threads' states as "want-stopped". */
3322 gdb_wants_all_threads_stopped (void)
3324 for_each_inferior (&all_threads
, gdb_wants_thread_stopped
);
3327 /* Clear the gdb_detached flag of every process. */
3330 gdb_reattached_process (struct inferior_list_entry
*entry
)
3332 struct process_info
*process
= (struct process_info
*) entry
;
3334 process
->gdb_detached
= 0;
3337 /* Callback for for_each_inferior. Clear the thread's pending status
3341 clear_pending_status_callback (struct inferior_list_entry
*entry
)
3343 struct thread_info
*thread
= (struct thread_info
*) entry
;
3345 thread
->status_pending_p
= 0;
3348 /* Callback for for_each_inferior. If the thread is stopped with an
3349 interesting event, mark it as having a pending event. */
3352 set_pending_status_callback (struct inferior_list_entry
*entry
)
3354 struct thread_info
*thread
= (struct thread_info
*) entry
;
3356 if (thread
->last_status
.kind
!= TARGET_WAITKIND_STOPPED
3357 || (thread
->last_status
.value
.sig
!= GDB_SIGNAL_0
3358 /* A breakpoint, watchpoint or finished step from a previous
3359 GDB run isn't considered interesting for a new GDB run.
3360 If we left those pending, the new GDB could consider them
3361 random SIGTRAPs. This leaves out real async traps. We'd
3362 have to peek into the (target-specific) siginfo to
3363 distinguish those. */
3364 && thread
->last_status
.value
.sig
!= GDB_SIGNAL_TRAP
))
3365 thread
->status_pending_p
= 1;
3368 /* Callback for find_inferior. Return true if ENTRY (a thread) has a
3369 pending status to report to GDB. */
3372 find_status_pending_thread_callback (struct inferior_list_entry
*entry
, void *data
)
3374 struct thread_info
*thread
= (struct thread_info
*) entry
;
3376 return thread
->status_pending_p
;
3379 /* Status handler for the '?' packet. */
3382 handle_status (char *own_buf
)
3384 /* GDB is connected, don't forward events to the target anymore. */
3385 for_each_inferior (&all_processes
, gdb_reattached_process
);
3387 /* In non-stop mode, we must send a stop reply for each stopped
3388 thread. In all-stop mode, just send one for the first stopped
3393 find_inferior (&all_threads
, queue_stop_reply_callback
, NULL
);
3395 /* The first is sent immediatly. OK is sent if there is no
3396 stopped thread, which is the same handling of the vStopped
3397 packet (by design). */
3398 notif_write_event (¬if_stop
, own_buf
);
3402 struct inferior_list_entry
*thread
= NULL
;
3405 stabilize_threads ();
3406 gdb_wants_all_threads_stopped ();
3408 /* We can only report one status, but we might be coming out of
3409 non-stop -- if more than one thread is stopped with
3410 interesting events, leave events for the threads we're not
3411 reporting now pending. They'll be reported the next time the
3412 threads are resumed. Start by marking all interesting events
3414 for_each_inferior (&all_threads
, set_pending_status_callback
);
3416 /* Prefer the last thread that reported an event to GDB (even if
3417 that was a GDB_SIGNAL_TRAP). */
3418 if (last_status
.kind
!= TARGET_WAITKIND_IGNORE
3419 && last_status
.kind
!= TARGET_WAITKIND_EXITED
3420 && last_status
.kind
!= TARGET_WAITKIND_SIGNALLED
)
3421 thread
= find_inferior_id (&all_threads
, last_ptid
);
3423 /* If the last event thread is not found for some reason, look
3424 for some other thread that might have an event to report. */
3426 thread
= find_inferior (&all_threads
,
3427 find_status_pending_thread_callback
, NULL
);
3429 /* If we're still out of luck, simply pick the first thread in
3432 thread
= get_first_inferior (&all_threads
);
3436 struct thread_info
*tp
= (struct thread_info
*) thread
;
3438 /* We're reporting this event, so it's no longer
3440 tp
->status_pending_p
= 0;
3442 /* GDB assumes the current thread is the thread we're
3443 reporting the status for. */
3444 general_thread
= thread
->id
;
3445 set_desired_thread (1);
3447 gdb_assert (tp
->last_status
.kind
!= TARGET_WAITKIND_IGNORE
);
3448 prepare_resume_reply (own_buf
, tp
->entry
.id
, &tp
->last_status
);
3451 strcpy (own_buf
, "W00");
3456 gdbserver_version (void)
3458 printf ("GNU gdbserver %s%s\n"
3459 "Copyright (C) 2017 Free Software Foundation, Inc.\n"
3460 "gdbserver is free software, covered by the "
3461 "GNU General Public License.\n"
3462 "This gdbserver was configured as \"%s\"\n",
3463 PKGVERSION
, version
, host_name
);
3467 gdbserver_usage (FILE *stream
)
3469 fprintf (stream
, "Usage:\tgdbserver [OPTIONS] COMM PROG [ARGS ...]\n"
3470 "\tgdbserver [OPTIONS] --attach COMM PID\n"
3471 "\tgdbserver [OPTIONS] --multi COMM\n"
3473 "COMM may either be a tty device (for serial debugging),\n"
3474 "HOST:PORT to listen for a TCP connection, or '-' or 'stdio' to use \n"
3475 "stdin/stdout of gdbserver.\n"
3476 "PROG is the executable program. ARGS are arguments passed to inferior.\n"
3477 "PID is the process ID to attach to, when --attach is specified.\n"
3479 "Operating modes:\n"
3481 " --attach Attach to running process PID.\n"
3482 " --multi Start server without a specific program, and\n"
3483 " only quit when explicitly commanded.\n"
3484 " --once Exit after the first connection has closed.\n"
3485 " --help Print this message and then exit.\n"
3486 " --version Display version information and exit.\n"
3490 " --wrapper WRAPPER -- Run WRAPPER to start new programs.\n"
3491 " --disable-randomization\n"
3492 " Run PROG with address space randomization disabled.\n"
3493 " --no-disable-randomization\n"
3494 " Don't disable address space randomization when\n"
3496 " --startup-with-shell\n"
3497 " Start PROG using a shell. I.e., execs a shell that\n"
3498 " then execs PROG. (default)\n"
3499 " --no-startup-with-shell\n"
3500 " Exec PROG directly instead of using a shell.\n"
3501 " Disables argument globbing and variable substitution\n"
3502 " on UNIX-like systems.\n"
3506 " --debug Enable general debugging output.\n"
3507 " --debug-format=opt1[,opt2,...]\n"
3508 " Specify extra content in debugging output.\n"
3513 " --remote-debug Enable remote protocol debugging output.\n"
3514 " --disable-packet=opt1[,opt2,...]\n"
3515 " Disable support for RSP packets or features.\n"
3517 " vCont, Tthread, qC, qfThreadInfo and \n"
3518 " threads (disable all threading packets).\n"
3520 "For more information, consult the GDB manual (available as on-line \n"
3521 "info or a printed manual).\n");
3522 if (REPORT_BUGS_TO
[0] && stream
== stdout
)
3523 fprintf (stream
, "Report bugs to \"%s\".\n", REPORT_BUGS_TO
);
3527 gdbserver_show_disableable (FILE *stream
)
3529 fprintf (stream
, "Disableable packets:\n"
3530 " vCont \tAll vCont packets\n"
3531 " qC \tQuerying the current thread\n"
3532 " qfThreadInfo\tThread listing\n"
3533 " Tthread \tPassing the thread specifier in the "
3534 "T stop reply packet\n"
3535 " threads \tAll of the above\n");
3539 kill_inferior_callback (struct inferior_list_entry
*entry
)
3541 struct process_info
*process
= (struct process_info
*) entry
;
3542 int pid
= ptid_get_pid (process
->entry
.id
);
3544 kill_inferior (pid
);
3545 discard_queued_stop_replies (pid_to_ptid (pid
));
3548 /* Callback for for_each_inferior to detach or kill the inferior,
3549 depending on whether we attached to it or not.
3550 We inform the user whether we're detaching or killing the process
3551 as this is only called when gdbserver is about to exit. */
3554 detach_or_kill_inferior_callback (struct inferior_list_entry
*entry
)
3556 struct process_info
*process
= (struct process_info
*) entry
;
3557 int pid
= ptid_get_pid (process
->entry
.id
);
3559 if (process
->attached
)
3560 detach_inferior (pid
);
3562 kill_inferior (pid
);
3564 discard_queued_stop_replies (pid_to_ptid (pid
));
3567 /* for_each_inferior callback for detach_or_kill_for_exit to print
3568 the pids of started inferiors. */
3571 print_started_pid (struct inferior_list_entry
*entry
)
3573 struct process_info
*process
= (struct process_info
*) entry
;
3575 if (! process
->attached
)
3577 int pid
= ptid_get_pid (process
->entry
.id
);
3578 fprintf (stderr
, " %d", pid
);
3582 /* for_each_inferior callback for detach_or_kill_for_exit to print
3583 the pids of attached inferiors. */
3586 print_attached_pid (struct inferior_list_entry
*entry
)
3588 struct process_info
*process
= (struct process_info
*) entry
;
3590 if (process
->attached
)
3592 int pid
= ptid_get_pid (process
->entry
.id
);
3593 fprintf (stderr
, " %d", pid
);
3597 /* Call this when exiting gdbserver with possible inferiors that need
3598 to be killed or detached from. */
3601 detach_or_kill_for_exit (void)
3603 /* First print a list of the inferiors we will be killing/detaching.
3604 This is to assist the user, for example, in case the inferior unexpectedly
3605 dies after we exit: did we screw up or did the inferior exit on its own?
3606 Having this info will save some head-scratching. */
3608 if (have_started_inferiors_p ())
3610 fprintf (stderr
, "Killing process(es):");
3611 for_each_inferior (&all_processes
, print_started_pid
);
3612 fprintf (stderr
, "\n");
3614 if (have_attached_inferiors_p ())
3616 fprintf (stderr
, "Detaching process(es):");
3617 for_each_inferior (&all_processes
, print_attached_pid
);
3618 fprintf (stderr
, "\n");
3621 /* Now we can kill or detach the inferiors. */
3623 for_each_inferior (&all_processes
, detach_or_kill_inferior_callback
);
3626 /* Value that will be passed to exit(3) when gdbserver exits. */
3627 static int exit_code
;
3629 /* Cleanup version of detach_or_kill_for_exit. */
3632 detach_or_kill_for_exit_cleanup (void *ignore
)
3637 detach_or_kill_for_exit ();
3640 CATCH (exception
, RETURN_MASK_ALL
)
3643 fprintf (stderr
, "Detach or kill failed: %s\n", exception
.message
);
3649 /* Main function. This is called by the real "main" function,
3650 wrapped in a TRY_CATCH that handles any uncaught exceptions. */
3652 static void ATTRIBUTE_NORETURN
3653 captured_main (int argc
, char *argv
[])
3658 const char *port
= NULL
;
3659 char **next_arg
= &argv
[1];
3660 volatile int multi_mode
= 0;
3661 volatile int attach
= 0;
3663 bool selftest
= false;
3665 while (*next_arg
!= NULL
&& **next_arg
== '-')
3667 if (strcmp (*next_arg
, "--version") == 0)
3669 gdbserver_version ();
3672 else if (strcmp (*next_arg
, "--help") == 0)
3674 gdbserver_usage (stdout
);
3677 else if (strcmp (*next_arg
, "--attach") == 0)
3679 else if (strcmp (*next_arg
, "--multi") == 0)
3681 else if (strcmp (*next_arg
, "--wrapper") == 0)
3688 while (*next_arg
!= NULL
&& strcmp (*next_arg
, "--") != 0)
3690 wrapper_argv
+= *next_arg
;
3691 wrapper_argv
+= ' ';
3695 if (!wrapper_argv
.empty ())
3697 /* Erase the last whitespace. */
3698 wrapper_argv
.erase (wrapper_argv
.end () - 1);
3701 if (next_arg
== tmp
|| *next_arg
== NULL
)
3703 gdbserver_usage (stderr
);
3707 /* Consume the "--". */
3710 else if (strcmp (*next_arg
, "--debug") == 0)
3712 else if (startswith (*next_arg
, "--debug-format="))
3715 = parse_debug_format_options ((*next_arg
)
3716 + sizeof ("--debug-format=") - 1, 0);
3718 if (error_msg
!= NULL
)
3720 fprintf (stderr
, "%s", error_msg
);
3724 else if (strcmp (*next_arg
, "--remote-debug") == 0)
3726 else if (strcmp (*next_arg
, "--disable-packet") == 0)
3728 gdbserver_show_disableable (stdout
);
3731 else if (startswith (*next_arg
, "--disable-packet="))
3733 char *packets
, *tok
;
3735 packets
= *next_arg
+= sizeof ("--disable-packet=") - 1;
3736 for (tok
= strtok (packets
, ",");
3738 tok
= strtok (NULL
, ","))
3740 if (strcmp ("vCont", tok
) == 0)
3741 disable_packet_vCont
= 1;
3742 else if (strcmp ("Tthread", tok
) == 0)
3743 disable_packet_Tthread
= 1;
3744 else if (strcmp ("qC", tok
) == 0)
3745 disable_packet_qC
= 1;
3746 else if (strcmp ("qfThreadInfo", tok
) == 0)
3747 disable_packet_qfThreadInfo
= 1;
3748 else if (strcmp ("threads", tok
) == 0)
3750 disable_packet_vCont
= 1;
3751 disable_packet_Tthread
= 1;
3752 disable_packet_qC
= 1;
3753 disable_packet_qfThreadInfo
= 1;
3757 fprintf (stderr
, "Don't know how to disable \"%s\".\n\n",
3759 gdbserver_show_disableable (stderr
);
3764 else if (strcmp (*next_arg
, "-") == 0)
3766 /* "-" specifies a stdio connection and is a form of port
3768 port
= STDIO_CONNECTION_NAME
;
3772 else if (strcmp (*next_arg
, "--disable-randomization") == 0)
3773 disable_randomization
= 1;
3774 else if (strcmp (*next_arg
, "--no-disable-randomization") == 0)
3775 disable_randomization
= 0;
3776 else if (strcmp (*next_arg
, "--startup-with-shell") == 0)
3777 startup_with_shell
= true;
3778 else if (strcmp (*next_arg
, "--no-startup-with-shell") == 0)
3779 startup_with_shell
= false;
3780 else if (strcmp (*next_arg
, "--once") == 0)
3782 else if (strcmp (*next_arg
, "--selftest") == 0)
3786 fprintf (stderr
, "Unknown argument: %s\n", *next_arg
);
3799 if ((port
== NULL
|| (!attach
&& !multi_mode
&& *next_arg
== NULL
))
3802 gdbserver_usage (stderr
);
3806 /* Remember stdio descriptors. LISTEN_DESC must not be listed, it will be
3807 opened by remote_prepare. */
3810 save_original_signals_state ();
3812 /* We need to know whether the remote connection is stdio before
3813 starting the inferior. Inferiors created in this scenario have
3814 stdin,stdout redirected. So do this here before we call
3817 remote_prepare (port
);
3822 /* --attach used to come after PORT, so allow it there for
3824 if (*next_arg
!= NULL
&& strcmp (*next_arg
, "--attach") == 0)
3831 && (*next_arg
== NULL
3832 || (*next_arg
)[0] == '\0'
3833 || (pid
= strtoul (*next_arg
, &arg_end
, 0)) == 0
3835 || next_arg
[1] != NULL
))
3840 gdbserver_usage (stderr
);
3844 /* Gather information about the environment. */
3845 our_environ
= gdb_environ::from_host_environ ();
3847 initialize_async_io ();
3849 have_job_control ();
3850 initialize_event_loop ();
3851 if (target_supports_tracepoints ())
3852 initialize_tracepoint ();
3853 initialize_notif ();
3855 own_buf
= (char *) xmalloc (PBUFSIZ
+ 1);
3856 mem_buf
= (unsigned char *) xmalloc (PBUFSIZ
);
3860 selftests::run_tests ();
3861 throw_quit ("Quit");
3864 if (pid
== 0 && *next_arg
!= NULL
)
3868 n
= argc
- (next_arg
- argv
);
3869 program_name
= xstrdup (next_arg
[0]);
3870 for (i
= 1; i
< n
; i
++)
3871 program_args
.push_back (xstrdup (next_arg
[i
]));
3872 program_args
.push_back (NULL
);
3874 /* Wait till we are at first instruction in program. */
3875 create_inferior (program_name
, program_args
);
3877 /* We are now (hopefully) stopped at the first instruction of
3878 the target process. This assumes that the target process was
3879 successfully created. */
3883 if (attach_inferior (pid
) == -1)
3884 error ("Attaching not supported on this target");
3886 /* Otherwise succeeded. */
3890 last_status
.kind
= TARGET_WAITKIND_EXITED
;
3891 last_status
.value
.integer
= 0;
3892 last_ptid
= minus_one_ptid
;
3894 make_cleanup (detach_or_kill_for_exit_cleanup
, NULL
);
3896 /* Don't report shared library events on the initial connection,
3897 even if some libraries are preloaded. Avoids the "stopped by
3898 shared library event" notice on gdb side. */
3901 if (last_status
.kind
== TARGET_WAITKIND_EXITED
3902 || last_status
.kind
== TARGET_WAITKIND_SIGNALLED
)
3907 if (!was_running
&& !multi_mode
)
3908 error ("No program to debug");
3915 report_fork_events
= 0;
3916 report_vfork_events
= 0;
3917 report_exec_events
= 0;
3918 /* Be sure we're out of tfind mode. */
3919 current_traceframe
= -1;
3920 cont_thread
= null_ptid
;
3921 swbreak_feature
= 0;
3922 hwbreak_feature
= 0;
3923 vCont_supported
= 0;
3929 /* Wait for events. This will return when all event sources
3930 are removed from the event loop. */
3931 start_event_loop ();
3933 /* If an exit was requested (using the "monitor exit"
3934 command), terminate now. */
3936 throw_quit ("Quit");
3938 /* The only other way to get here is for getpkt to fail:
3940 - If --once was specified, we're done.
3942 - If not in extended-remote mode, and we're no longer
3943 debugging anything, simply exit: GDB has disconnected
3944 after processing the last process exit.
3946 - Otherwise, close the connection and reopen it at the
3948 if (run_once
|| (!extended_protocol
&& !target_running ()))
3949 throw_quit ("Quit");
3952 "Remote side has terminated connection. "
3953 "GDBserver will reopen the connection.\n");
3955 /* Get rid of any pending statuses. An eventual reconnection
3956 (by the same GDB instance or another) will refresh all its
3957 state from scratch. */
3958 discard_queued_stop_replies (minus_one_ptid
);
3959 for_each_inferior (&all_threads
,
3960 clear_pending_status_callback
);
3964 if (disconnected_tracing
)
3966 /* Try to enable non-stop/async mode, so we we can
3967 both wait for an async socket accept, and handle
3968 async target events simultaneously. There's also
3969 no point either in having the target always stop
3970 all threads, when we're going to pass signals
3971 down without informing GDB. */
3974 if (start_non_stop (1))
3977 /* Detaching implicitly resumes all threads;
3978 simply disconnecting does not. */
3984 "Disconnected tracing disabled; "
3985 "stopping trace run.\n");
3990 CATCH (exception
, RETURN_MASK_ERROR
)
3993 fprintf (stderr
, "gdbserver: %s\n", exception
.message
);
3995 if (response_needed
)
3997 write_enn (own_buf
);
4002 throw_quit ("Quit");
4008 /* Main function. */
4011 main (int argc
, char *argv
[])
4016 captured_main (argc
, argv
);
4018 CATCH (exception
, RETURN_MASK_ALL
)
4020 if (exception
.reason
== RETURN_ERROR
)
4023 fprintf (stderr
, "%s\n", exception
.message
);
4024 fprintf (stderr
, "Exiting\n");
4032 gdb_assert_not_reached ("captured_main should never return");
4035 /* Process options coming from Z packets for a breakpoint. PACKET is
4036 the packet buffer. *PACKET is updated to point to the first char
4037 after the last processed option. */
4040 process_point_options (struct gdb_breakpoint
*bp
, char **packet
)
4042 char *dataptr
= *packet
;
4045 /* Check if data has the correct format. */
4046 if (*dataptr
!= ';')
4053 if (*dataptr
== ';')
4056 if (*dataptr
== 'X')
4058 /* Conditional expression. */
4060 debug_printf ("Found breakpoint condition.\n");
4061 if (!add_breakpoint_condition (bp
, &dataptr
))
4062 dataptr
= strchrnul (dataptr
, ';');
4064 else if (startswith (dataptr
, "cmds:"))
4066 dataptr
+= strlen ("cmds:");
4068 debug_printf ("Found breakpoint commands %s.\n", dataptr
);
4069 persist
= (*dataptr
== '1');
4071 if (add_breakpoint_commands (bp
, &dataptr
, persist
))
4072 dataptr
= strchrnul (dataptr
, ';');
4076 fprintf (stderr
, "Unknown token %c, ignoring.\n",
4078 /* Skip tokens until we find one that we recognize. */
4079 dataptr
= strchrnul (dataptr
, ';');
4085 /* Event loop callback that handles a serial event. The first byte in
4086 the serial buffer gets us here. We expect characters to arrive at
4087 a brisk pace, so we read the rest of the packet with a blocking
4091 process_serial_event (void)
4099 int new_packet_len
= -1;
4101 disable_async_io ();
4103 response_needed
= 0;
4104 packet_len
= getpkt (own_buf
);
4105 if (packet_len
<= 0)
4108 /* Force an event loop break. */
4111 response_needed
= 1;
4113 char ch
= own_buf
[0];
4117 handle_query (own_buf
, packet_len
, &new_packet_len
);
4120 handle_general_set (own_buf
);
4123 handle_detach (own_buf
);
4126 extended_protocol
= 1;
4130 handle_status (own_buf
);
4133 if (own_buf
[1] == 'c' || own_buf
[1] == 'g' || own_buf
[1] == 's')
4135 require_running_or_break (own_buf
);
4137 ptid_t thread_id
= read_ptid (&own_buf
[2], NULL
);
4139 if (thread_id
== null_ptid
|| thread_id
== minus_one_ptid
)
4140 thread_id
= null_ptid
;
4141 else if (thread_id
.is_pid ())
4143 /* The ptid represents a pid. */
4144 thread_info
*thread
= find_any_thread_of_pid (thread_id
.pid ());
4148 write_enn (own_buf
);
4152 thread_id
= thread
->entry
.id
;
4156 /* The ptid represents a lwp/tid. */
4157 if (find_thread_ptid (thread_id
) == NULL
)
4159 write_enn (own_buf
);
4164 if (own_buf
[1] == 'g')
4166 if (ptid_equal (thread_id
, null_ptid
))
4168 /* GDB is telling us to choose any thread. Check if
4169 the currently selected thread is still valid. If
4170 it is not, select the first available. */
4171 struct thread_info
*thread
=
4172 (struct thread_info
*) find_inferior_id (&all_threads
,
4175 thread
= get_first_thread ();
4176 thread_id
= thread
->entry
.id
;
4179 general_thread
= thread_id
;
4180 set_desired_thread (1);
4181 gdb_assert (current_thread
!= NULL
);
4183 else if (own_buf
[1] == 'c')
4184 cont_thread
= thread_id
;
4190 /* Silently ignore it so that gdb can extend the protocol
4191 without compatibility headaches. */
4196 require_running_or_break (own_buf
);
4197 if (current_traceframe
>= 0)
4199 struct regcache
*regcache
4200 = new_register_cache (current_target_desc ());
4202 if (fetch_traceframe_registers (current_traceframe
,
4204 registers_to_string (regcache
, own_buf
);
4206 write_enn (own_buf
);
4207 free_register_cache (regcache
);
4211 struct regcache
*regcache
;
4213 if (!set_desired_thread (1))
4214 write_enn (own_buf
);
4217 regcache
= get_thread_regcache (current_thread
, 1);
4218 registers_to_string (regcache
, own_buf
);
4223 require_running_or_break (own_buf
);
4224 if (current_traceframe
>= 0)
4225 write_enn (own_buf
);
4228 struct regcache
*regcache
;
4230 if (!set_desired_thread (1))
4231 write_enn (own_buf
);
4234 regcache
= get_thread_regcache (current_thread
, 1);
4235 registers_from_string (regcache
, &own_buf
[1]);
4241 require_running_or_break (own_buf
);
4242 decode_m_packet (&own_buf
[1], &mem_addr
, &len
);
4243 res
= gdb_read_memory (mem_addr
, mem_buf
, len
);
4245 write_enn (own_buf
);
4247 bin2hex (mem_buf
, own_buf
, res
);
4250 require_running_or_break (own_buf
);
4251 decode_M_packet (&own_buf
[1], &mem_addr
, &len
, &mem_buf
);
4252 if (gdb_write_memory (mem_addr
, mem_buf
, len
) == 0)
4255 write_enn (own_buf
);
4258 require_running_or_break (own_buf
);
4259 if (decode_X_packet (&own_buf
[1], packet_len
- 1,
4260 &mem_addr
, &len
, &mem_buf
) < 0
4261 || gdb_write_memory (mem_addr
, mem_buf
, len
) != 0)
4262 write_enn (own_buf
);
4267 require_running_or_break (own_buf
);
4268 hex2bin (own_buf
+ 1, &sig
, 1);
4269 if (gdb_signal_to_host_p ((enum gdb_signal
) sig
))
4270 signal
= gdb_signal_to_host ((enum gdb_signal
) sig
);
4273 myresume (own_buf
, 0, signal
);
4276 require_running_or_break (own_buf
);
4277 hex2bin (own_buf
+ 1, &sig
, 1);
4278 if (gdb_signal_to_host_p ((enum gdb_signal
) sig
))
4279 signal
= gdb_signal_to_host ((enum gdb_signal
) sig
);
4282 myresume (own_buf
, 1, signal
);
4285 require_running_or_break (own_buf
);
4287 myresume (own_buf
, 0, signal
);
4290 require_running_or_break (own_buf
);
4292 myresume (own_buf
, 1, signal
);
4294 case 'Z': /* insert_ ... */
4296 case 'z': /* remove_ ... */
4301 char type
= own_buf
[1];
4303 const int insert
= ch
== 'Z';
4304 char *p
= &own_buf
[3];
4306 p
= unpack_varlen_hex (p
, &addr
);
4307 kind
= strtol (p
+ 1, &dataptr
, 16);
4311 struct gdb_breakpoint
*bp
;
4313 bp
= set_gdb_breakpoint (type
, addr
, kind
, &res
);
4318 /* GDB may have sent us a list of *point parameters to
4319 be evaluated on the target's side. Read such list
4320 here. If we already have a list of parameters, GDB
4321 is telling us to drop that list and use this one
4323 clear_breakpoint_conditions_and_commands (bp
);
4324 process_point_options (bp
, &dataptr
);
4328 res
= delete_gdb_breakpoint (type
, addr
, kind
);
4336 write_enn (own_buf
);
4340 response_needed
= 0;
4341 if (!target_running ())
4342 /* The packet we received doesn't make sense - but we can't
4343 reply to it, either. */
4346 fprintf (stderr
, "Killing all inferiors\n");
4347 for_each_inferior (&all_processes
, kill_inferior_callback
);
4349 /* When using the extended protocol, we wait with no program
4350 running. The traditional protocol will exit instead. */
4351 if (extended_protocol
)
4353 last_status
.kind
= TARGET_WAITKIND_EXITED
;
4354 last_status
.value
.sig
= GDB_SIGNAL_KILL
;
4362 require_running_or_break (own_buf
);
4364 ptid_t thread_id
= read_ptid (&own_buf
[1], NULL
);
4365 if (find_thread_ptid (thread_id
) == NULL
)
4367 write_enn (own_buf
);
4371 if (mythread_alive (thread_id
))
4374 write_enn (own_buf
);
4378 response_needed
= 0;
4380 /* Restarting the inferior is only supported in the extended
4382 if (extended_protocol
)
4384 if (target_running ())
4385 for_each_inferior (&all_processes
,
4386 kill_inferior_callback
);
4387 fprintf (stderr
, "GDBserver restarting\n");
4389 /* Wait till we are at 1st instruction in prog. */
4390 if (program_name
!= NULL
)
4392 create_inferior (program_name
, program_args
);
4394 if (last_status
.kind
== TARGET_WAITKIND_STOPPED
)
4396 /* Stopped at the first instruction of the target
4398 general_thread
= last_ptid
;
4402 /* Something went wrong. */
4403 general_thread
= null_ptid
;
4408 last_status
.kind
= TARGET_WAITKIND_EXITED
;
4409 last_status
.value
.sig
= GDB_SIGNAL_KILL
;
4415 /* It is a request we don't understand. Respond with an
4416 empty packet so that gdb knows that we don't support this
4422 /* Extended (long) request. */
4423 handle_v_requests (own_buf
, packet_len
, &new_packet_len
);
4427 /* It is a request we don't understand. Respond with an empty
4428 packet so that gdb knows that we don't support this
4434 if (new_packet_len
!= -1)
4435 putpkt_binary (own_buf
, new_packet_len
);
4439 response_needed
= 0;
4447 /* Event-loop callback for serial events. */
4450 handle_serial_event (int err
, gdb_client_data client_data
)
4453 debug_printf ("handling possible serial event\n");
4455 /* Really handle it. */
4456 if (process_serial_event () < 0)
4459 /* Be sure to not change the selected thread behind GDB's back.
4460 Important in the non-stop mode asynchronous protocol. */
4461 set_desired_thread (1);
4466 /* Push a stop notification on the notification queue. */
4469 push_stop_notification (ptid_t ptid
, struct target_waitstatus
*status
)
4471 struct vstop_notif
*vstop_notif
= XNEW (struct vstop_notif
);
4473 vstop_notif
->status
= *status
;
4474 vstop_notif
->ptid
= ptid
;
4475 /* Push Stop notification. */
4476 notif_push (¬if_stop
, (struct notif_event
*) vstop_notif
);
4479 /* Event-loop callback for target events. */
4482 handle_target_event (int err
, gdb_client_data client_data
)
4485 debug_printf ("handling possible target event\n");
4487 last_ptid
= mywait (minus_one_ptid
, &last_status
,
4490 if (last_status
.kind
== TARGET_WAITKIND_NO_RESUMED
)
4492 if (gdb_connected () && report_no_resumed
)
4493 push_stop_notification (null_ptid
, &last_status
);
4495 else if (last_status
.kind
!= TARGET_WAITKIND_IGNORE
)
4497 int pid
= ptid_get_pid (last_ptid
);
4498 struct process_info
*process
= find_process_pid (pid
);
4499 int forward_event
= !gdb_connected () || process
->gdb_detached
;
4501 if (last_status
.kind
== TARGET_WAITKIND_EXITED
4502 || last_status
.kind
== TARGET_WAITKIND_SIGNALLED
)
4504 mark_breakpoints_out (process
);
4505 target_mourn_inferior (last_ptid
);
4507 else if (last_status
.kind
== TARGET_WAITKIND_THREAD_EXITED
)
4511 /* We're reporting this thread as stopped. Update its
4512 "want-stopped" state to what the client wants, until it
4513 gets a new resume action. */
4514 current_thread
->last_resume_kind
= resume_stop
;
4515 current_thread
->last_status
= last_status
;
4520 if (!target_running ())
4522 /* The last process exited. We're done. */
4526 if (last_status
.kind
== TARGET_WAITKIND_EXITED
4527 || last_status
.kind
== TARGET_WAITKIND_SIGNALLED
4528 || last_status
.kind
== TARGET_WAITKIND_THREAD_EXITED
)
4532 /* A thread stopped with a signal, but gdb isn't
4533 connected to handle it. Pass it down to the
4534 inferior, as if it wasn't being traced. */
4535 enum gdb_signal signal
;
4538 debug_printf ("GDB not connected; forwarding event %d for"
4540 (int) last_status
.kind
,
4541 target_pid_to_str (last_ptid
));
4543 if (last_status
.kind
== TARGET_WAITKIND_STOPPED
)
4544 signal
= last_status
.value
.sig
;
4546 signal
= GDB_SIGNAL_0
;
4547 target_continue (last_ptid
, signal
);
4551 push_stop_notification (last_ptid
, &last_status
);
4554 /* Be sure to not change the selected thread behind GDB's back.
4555 Important in the non-stop mode asynchronous protocol. */
4556 set_desired_thread (1);
4569 } // namespace selftests
4570 #endif /* GDB_SELF_TEST */