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
;
1536 strcpy (p
, " <library name=\"");
1538 std::string name
= xml_escape_text (dll
->name
);
1539 strcpy (p
, name
.c_str ());
1541 strcpy (p
, "\"><segment address=\"");
1543 sprintf (p
, "0x%lx", (long) dll
->base_addr
);
1545 strcpy (p
, "\"/></library>\n");
1551 /* Handle qXfer:libraries:read. */
1554 handle_qxfer_libraries (const char *annex
,
1555 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1556 ULONGEST offset
, LONGEST len
)
1558 unsigned int total_len
;
1561 if (writebuf
!= NULL
)
1564 if (annex
[0] != '\0' || current_thread
== NULL
)
1568 for_each_inferior_with_data (&all_dlls
, accumulate_file_name_length
,
1571 document
= (char *) malloc (total_len
);
1572 if (document
== NULL
)
1575 strcpy (document
, "<library-list version=\"1.0\">\n");
1576 p
= document
+ strlen (document
);
1578 for_each_inferior_with_data (&all_dlls
, emit_dll_description
, &p
);
1580 strcpy (p
, "</library-list>\n");
1582 total_len
= strlen (document
);
1584 if (offset
> total_len
)
1590 if (offset
+ len
> total_len
)
1591 len
= total_len
- offset
;
1593 memcpy (readbuf
, document
+ offset
, len
);
1598 /* Handle qXfer:libraries-svr4:read. */
1601 handle_qxfer_libraries_svr4 (const char *annex
,
1602 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1603 ULONGEST offset
, LONGEST len
)
1605 if (writebuf
!= NULL
)
1608 if (current_thread
== NULL
|| the_target
->qxfer_libraries_svr4
== NULL
)
1611 return the_target
->qxfer_libraries_svr4 (annex
, readbuf
, writebuf
, offset
, len
);
1614 /* Handle qXfer:osadata:read. */
1617 handle_qxfer_osdata (const char *annex
,
1618 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1619 ULONGEST offset
, LONGEST len
)
1621 if (the_target
->qxfer_osdata
== NULL
|| writebuf
!= NULL
)
1624 return (*the_target
->qxfer_osdata
) (annex
, readbuf
, NULL
, offset
, len
);
1627 /* Handle qXfer:siginfo:read and qXfer:siginfo:write. */
1630 handle_qxfer_siginfo (const char *annex
,
1631 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1632 ULONGEST offset
, LONGEST len
)
1634 if (the_target
->qxfer_siginfo
== NULL
)
1637 if (annex
[0] != '\0' || current_thread
== NULL
)
1640 return (*the_target
->qxfer_siginfo
) (annex
, readbuf
, writebuf
, offset
, len
);
1643 /* Handle qXfer:spu:read and qXfer:spu:write. */
1646 handle_qxfer_spu (const char *annex
,
1647 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1648 ULONGEST offset
, LONGEST len
)
1650 if (the_target
->qxfer_spu
== NULL
)
1653 if (current_thread
== NULL
)
1656 return (*the_target
->qxfer_spu
) (annex
, readbuf
, writebuf
, offset
, len
);
1659 /* Handle qXfer:statictrace:read. */
1662 handle_qxfer_statictrace (const char *annex
,
1663 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1664 ULONGEST offset
, LONGEST len
)
1668 if (writebuf
!= NULL
)
1671 if (annex
[0] != '\0' || current_thread
== NULL
|| current_traceframe
== -1)
1674 if (traceframe_read_sdata (current_traceframe
, offset
,
1675 readbuf
, len
, &nbytes
))
1680 /* Helper for handle_qxfer_threads_proper.
1681 Emit the XML to describe the thread of INF. */
1684 handle_qxfer_threads_worker (struct inferior_list_entry
*inf
, void *arg
)
1686 struct thread_info
*thread
= (struct thread_info
*) inf
;
1687 struct buffer
*buffer
= (struct buffer
*) arg
;
1688 ptid_t ptid
= ptid_of (thread
);
1690 int core
= target_core_of_thread (ptid
);
1692 const char *name
= target_thread_name (ptid
);
1694 write_ptid (ptid_s
, ptid
);
1696 buffer_xml_printf (buffer
, "<thread id=\"%s\"", ptid_s
);
1700 sprintf (core_s
, "%d", core
);
1701 buffer_xml_printf (buffer
, " core=\"%s\"", core_s
);
1705 buffer_xml_printf (buffer
, " name=\"%s\"", name
);
1707 buffer_xml_printf (buffer
, "/>\n");
1710 /* Helper for handle_qxfer_threads. */
1713 handle_qxfer_threads_proper (struct buffer
*buffer
)
1715 buffer_grow_str (buffer
, "<threads>\n");
1717 for_each_inferior_with_data (&all_threads
, handle_qxfer_threads_worker
,
1720 buffer_grow_str0 (buffer
, "</threads>\n");
1723 /* Handle qXfer:threads:read. */
1726 handle_qxfer_threads (const char *annex
,
1727 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1728 ULONGEST offset
, LONGEST len
)
1730 static char *result
= 0;
1731 static unsigned int result_length
= 0;
1733 if (writebuf
!= NULL
)
1736 if (annex
[0] != '\0')
1741 struct buffer buffer
;
1742 /* When asked for data at offset 0, generate everything and store into
1743 'result'. Successive reads will be served off 'result'. */
1747 buffer_init (&buffer
);
1749 handle_qxfer_threads_proper (&buffer
);
1751 result
= buffer_finish (&buffer
);
1752 result_length
= strlen (result
);
1753 buffer_free (&buffer
);
1756 if (offset
>= result_length
)
1758 /* We're out of data. */
1765 if (len
> result_length
- offset
)
1766 len
= result_length
- offset
;
1768 memcpy (readbuf
, result
+ offset
, len
);
1773 /* Handle qXfer:traceframe-info:read. */
1776 handle_qxfer_traceframe_info (const char *annex
,
1777 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1778 ULONGEST offset
, LONGEST len
)
1780 static char *result
= 0;
1781 static unsigned int result_length
= 0;
1783 if (writebuf
!= NULL
)
1786 if (!target_running () || annex
[0] != '\0' || current_traceframe
== -1)
1791 struct buffer buffer
;
1793 /* When asked for data at offset 0, generate everything and
1794 store into 'result'. Successive reads will be served off
1798 buffer_init (&buffer
);
1800 traceframe_read_info (current_traceframe
, &buffer
);
1802 result
= buffer_finish (&buffer
);
1803 result_length
= strlen (result
);
1804 buffer_free (&buffer
);
1807 if (offset
>= result_length
)
1809 /* We're out of data. */
1816 if (len
> result_length
- offset
)
1817 len
= result_length
- offset
;
1819 memcpy (readbuf
, result
+ offset
, len
);
1823 /* Handle qXfer:fdpic:read. */
1826 handle_qxfer_fdpic (const char *annex
, gdb_byte
*readbuf
,
1827 const gdb_byte
*writebuf
, ULONGEST offset
, LONGEST len
)
1829 if (the_target
->read_loadmap
== NULL
)
1832 if (current_thread
== NULL
)
1835 return (*the_target
->read_loadmap
) (annex
, offset
, readbuf
, len
);
1838 /* Handle qXfer:btrace:read. */
1841 handle_qxfer_btrace (const char *annex
,
1842 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1843 ULONGEST offset
, LONGEST len
)
1845 static struct buffer cache
;
1846 struct thread_info
*thread
;
1847 enum btrace_read_type type
;
1850 if (the_target
->read_btrace
== NULL
|| writebuf
!= NULL
)
1853 if (ptid_equal (general_thread
, null_ptid
)
1854 || ptid_equal (general_thread
, minus_one_ptid
))
1856 strcpy (own_buf
, "E.Must select a single thread.");
1860 thread
= find_thread_ptid (general_thread
);
1863 strcpy (own_buf
, "E.No such thread.");
1867 if (thread
->btrace
== NULL
)
1869 strcpy (own_buf
, "E.Btrace not enabled.");
1873 if (strcmp (annex
, "all") == 0)
1874 type
= BTRACE_READ_ALL
;
1875 else if (strcmp (annex
, "new") == 0)
1876 type
= BTRACE_READ_NEW
;
1877 else if (strcmp (annex
, "delta") == 0)
1878 type
= BTRACE_READ_DELTA
;
1881 strcpy (own_buf
, "E.Bad annex.");
1887 buffer_free (&cache
);
1889 result
= target_read_btrace (thread
->btrace
, &cache
, type
);
1892 memcpy (own_buf
, cache
.buffer
, cache
.used_size
);
1896 else if (offset
> cache
.used_size
)
1898 buffer_free (&cache
);
1902 if (len
> cache
.used_size
- offset
)
1903 len
= cache
.used_size
- offset
;
1905 memcpy (readbuf
, cache
.buffer
+ offset
, len
);
1910 /* Handle qXfer:btrace-conf:read. */
1913 handle_qxfer_btrace_conf (const char *annex
,
1914 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1915 ULONGEST offset
, LONGEST len
)
1917 static struct buffer cache
;
1918 struct thread_info
*thread
;
1921 if (the_target
->read_btrace_conf
== NULL
|| writebuf
!= NULL
)
1924 if (annex
[0] != '\0')
1927 if (ptid_equal (general_thread
, null_ptid
)
1928 || ptid_equal (general_thread
, minus_one_ptid
))
1930 strcpy (own_buf
, "E.Must select a single thread.");
1934 thread
= find_thread_ptid (general_thread
);
1937 strcpy (own_buf
, "E.No such thread.");
1941 if (thread
->btrace
== NULL
)
1943 strcpy (own_buf
, "E.Btrace not enabled.");
1949 buffer_free (&cache
);
1951 result
= target_read_btrace_conf (thread
->btrace
, &cache
);
1954 memcpy (own_buf
, cache
.buffer
, cache
.used_size
);
1958 else if (offset
> cache
.used_size
)
1960 buffer_free (&cache
);
1964 if (len
> cache
.used_size
- offset
)
1965 len
= cache
.used_size
- offset
;
1967 memcpy (readbuf
, cache
.buffer
+ offset
, len
);
1972 static const struct qxfer qxfer_packets
[] =
1974 { "auxv", handle_qxfer_auxv
},
1975 { "btrace", handle_qxfer_btrace
},
1976 { "btrace-conf", handle_qxfer_btrace_conf
},
1977 { "exec-file", handle_qxfer_exec_file
},
1978 { "fdpic", handle_qxfer_fdpic
},
1979 { "features", handle_qxfer_features
},
1980 { "libraries", handle_qxfer_libraries
},
1981 { "libraries-svr4", handle_qxfer_libraries_svr4
},
1982 { "osdata", handle_qxfer_osdata
},
1983 { "siginfo", handle_qxfer_siginfo
},
1984 { "spu", handle_qxfer_spu
},
1985 { "statictrace", handle_qxfer_statictrace
},
1986 { "threads", handle_qxfer_threads
},
1987 { "traceframe-info", handle_qxfer_traceframe_info
},
1991 handle_qxfer (char *own_buf
, int packet_len
, int *new_packet_len_p
)
1999 if (!startswith (own_buf
, "qXfer:"))
2002 /* Grab the object, r/w and annex. */
2003 if (decode_xfer (own_buf
+ 6, &object
, &rw
, &annex
, &offset
) < 0)
2005 write_enn (own_buf
);
2010 i
< sizeof (qxfer_packets
) / sizeof (qxfer_packets
[0]);
2013 const struct qxfer
*q
= &qxfer_packets
[i
];
2015 if (strcmp (object
, q
->object
) == 0)
2017 if (strcmp (rw
, "read") == 0)
2019 unsigned char *data
;
2024 /* Grab the offset and length. */
2025 if (decode_xfer_read (offset
, &ofs
, &len
) < 0)
2027 write_enn (own_buf
);
2031 /* Read one extra byte, as an indicator of whether there is
2033 if (len
> PBUFSIZ
- 2)
2035 data
= (unsigned char *) malloc (len
+ 1);
2038 write_enn (own_buf
);
2041 n
= (*q
->xfer
) (annex
, data
, NULL
, ofs
, len
+ 1);
2049 /* Preserve error message. */
2052 write_enn (own_buf
);
2054 *new_packet_len_p
= write_qxfer_response (own_buf
, data
, len
, 1);
2056 *new_packet_len_p
= write_qxfer_response (own_buf
, data
, n
, 0);
2061 else if (strcmp (rw
, "write") == 0)
2066 unsigned char *data
;
2068 strcpy (own_buf
, "E00");
2069 data
= (unsigned char *) malloc (packet_len
- (offset
- own_buf
));
2072 write_enn (own_buf
);
2075 if (decode_xfer_write (offset
, packet_len
- (offset
- own_buf
),
2076 &ofs
, &len
, data
) < 0)
2079 write_enn (own_buf
);
2083 n
= (*q
->xfer
) (annex
, NULL
, data
, ofs
, len
);
2091 /* Preserve error message. */
2094 write_enn (own_buf
);
2096 sprintf (own_buf
, "%x", n
);
2109 /* Compute 32 bit CRC from inferior memory.
2111 On success, return 32 bit CRC.
2112 On failure, return (unsigned long long) -1. */
2114 static unsigned long long
2115 crc32 (CORE_ADDR base
, int len
, unsigned int crc
)
2119 unsigned char byte
= 0;
2121 /* Return failure if memory read fails. */
2122 if (read_inferior_memory (base
, &byte
, 1) != 0)
2123 return (unsigned long long) -1;
2125 crc
= xcrc32 (&byte
, 1, crc
);
2128 return (unsigned long long) crc
;
2131 /* Add supported btrace packets to BUF. */
2134 supported_btrace_packets (char *buf
)
2136 int btrace_supported
= 0;
2138 if (target_supports_btrace (BTRACE_FORMAT_BTS
))
2140 strcat (buf
, ";Qbtrace:bts+");
2141 strcat (buf
, ";Qbtrace-conf:bts:size+");
2143 btrace_supported
= 1;
2146 if (target_supports_btrace (BTRACE_FORMAT_PT
))
2148 strcat (buf
, ";Qbtrace:pt+");
2149 strcat (buf
, ";Qbtrace-conf:pt:size+");
2151 btrace_supported
= 1;
2154 if (!btrace_supported
)
2157 strcat (buf
, ";Qbtrace:off+");
2158 strcat (buf
, ";qXfer:btrace:read+");
2159 strcat (buf
, ";qXfer:btrace-conf:read+");
2162 /* Handle all of the extended 'q' packets. */
2165 handle_query (char *own_buf
, int packet_len
, int *new_packet_len_p
)
2167 static struct inferior_list_entry
*thread_ptr
;
2169 /* Reply the current thread id. */
2170 if (strcmp ("qC", own_buf
) == 0 && !disable_packet_qC
)
2173 require_running_or_return (own_buf
);
2175 if (general_thread
!= null_ptid
&& general_thread
!= minus_one_ptid
)
2176 ptid
= general_thread
;
2179 thread_ptr
= get_first_inferior (&all_threads
);
2180 ptid
= thread_ptr
->id
;
2183 sprintf (own_buf
, "QC");
2185 write_ptid (own_buf
, ptid
);
2189 if (strcmp ("qSymbol::", own_buf
) == 0)
2191 struct thread_info
*save_thread
= current_thread
;
2193 /* For qSymbol, GDB only changes the current thread if the
2194 previous current thread was of a different process. So if
2195 the previous thread is gone, we need to pick another one of
2196 the same process. This can happen e.g., if we followed an
2197 exec in a non-leader thread. */
2198 if (current_thread
== NULL
)
2201 = find_any_thread_of_pid (ptid_get_pid (general_thread
));
2203 /* Just in case, if we didn't find a thread, then bail out
2204 instead of crashing. */
2205 if (current_thread
== NULL
)
2207 write_enn (own_buf
);
2208 current_thread
= save_thread
;
2213 /* GDB is suggesting new symbols have been loaded. This may
2214 mean a new shared library has been detected as loaded, so
2215 take the opportunity to check if breakpoints we think are
2216 inserted, still are. Note that it isn't guaranteed that
2217 we'll see this when a shared library is loaded, and nor will
2218 we see this for unloads (although breakpoints in unloaded
2219 libraries shouldn't trigger), as GDB may not find symbols for
2220 the library at all. We also re-validate breakpoints when we
2221 see a second GDB breakpoint for the same address, and or when
2222 we access breakpoint shadows. */
2223 validate_breakpoints ();
2225 if (target_supports_tracepoints ())
2226 tracepoint_look_up_symbols ();
2228 if (current_thread
!= NULL
&& the_target
->look_up_symbols
!= NULL
)
2229 (*the_target
->look_up_symbols
) ();
2231 current_thread
= save_thread
;
2233 strcpy (own_buf
, "OK");
2237 if (!disable_packet_qfThreadInfo
)
2239 if (strcmp ("qfThreadInfo", own_buf
) == 0)
2241 require_running_or_return (own_buf
);
2242 thread_ptr
= get_first_inferior (&all_threads
);
2245 write_ptid (own_buf
, thread_ptr
->id
);
2246 thread_ptr
= thread_ptr
->next
;
2250 if (strcmp ("qsThreadInfo", own_buf
) == 0)
2252 require_running_or_return (own_buf
);
2253 if (thread_ptr
!= NULL
)
2256 write_ptid (own_buf
, thread_ptr
->id
);
2257 thread_ptr
= thread_ptr
->next
;
2262 sprintf (own_buf
, "l");
2268 if (the_target
->read_offsets
!= NULL
2269 && strcmp ("qOffsets", own_buf
) == 0)
2271 CORE_ADDR text
, data
;
2273 require_running_or_return (own_buf
);
2274 if (the_target
->read_offsets (&text
, &data
))
2275 sprintf (own_buf
, "Text=%lX;Data=%lX;Bss=%lX",
2276 (long)text
, (long)data
, (long)data
);
2278 write_enn (own_buf
);
2283 /* Protocol features query. */
2284 if (startswith (own_buf
, "qSupported")
2285 && (own_buf
[10] == ':' || own_buf
[10] == '\0'))
2287 char *p
= &own_buf
[10];
2288 int gdb_supports_qRelocInsn
= 0;
2290 /* Process each feature being provided by GDB. The first
2291 feature will follow a ':', and latter features will follow
2295 char **qsupported
= NULL
;
2300 /* Two passes, to avoid nested strtok calls in
2301 target_process_qsupported. */
2302 for (p
= strtok (p
+ 1, ";");
2304 p
= strtok (NULL
, ";"))
2307 qsupported
= XRESIZEVEC (char *, qsupported
, count
);
2308 qsupported
[count
- 1] = xstrdup (p
);
2311 for (i
= 0; i
< count
; i
++)
2314 if (strcmp (p
, "multiprocess+") == 0)
2316 /* GDB supports and wants multi-process support if
2318 if (target_supports_multi_process ())
2321 else if (strcmp (p
, "qRelocInsn+") == 0)
2323 /* GDB supports relocate instruction requests. */
2324 gdb_supports_qRelocInsn
= 1;
2326 else if (strcmp (p
, "swbreak+") == 0)
2328 /* GDB wants us to report whether a trap is caused
2329 by a software breakpoint and for us to handle PC
2330 adjustment if necessary on this target. */
2331 if (target_supports_stopped_by_sw_breakpoint ())
2332 swbreak_feature
= 1;
2334 else if (strcmp (p
, "hwbreak+") == 0)
2336 /* GDB wants us to report whether a trap is caused
2337 by a hardware breakpoint. */
2338 if (target_supports_stopped_by_hw_breakpoint ())
2339 hwbreak_feature
= 1;
2341 else if (strcmp (p
, "fork-events+") == 0)
2343 /* GDB supports and wants fork events if possible. */
2344 if (target_supports_fork_events ())
2345 report_fork_events
= 1;
2347 else if (strcmp (p
, "vfork-events+") == 0)
2349 /* GDB supports and wants vfork events if possible. */
2350 if (target_supports_vfork_events ())
2351 report_vfork_events
= 1;
2353 else if (strcmp (p
, "exec-events+") == 0)
2355 /* GDB supports and wants exec events if possible. */
2356 if (target_supports_exec_events ())
2357 report_exec_events
= 1;
2359 else if (strcmp (p
, "vContSupported+") == 0)
2360 vCont_supported
= 1;
2361 else if (strcmp (p
, "QThreadEvents+") == 0)
2363 else if (strcmp (p
, "no-resumed+") == 0)
2365 /* GDB supports and wants TARGET_WAITKIND_NO_RESUMED
2367 report_no_resumed
= 1;
2371 /* Move the unknown features all together. */
2372 qsupported
[i
] = NULL
;
2373 qsupported
[unknown
] = p
;
2378 /* Give the target backend a chance to process the unknown
2380 target_process_qsupported (qsupported
, unknown
);
2382 for (i
= 0; i
< count
; i
++)
2383 free (qsupported
[i
]);
2388 "PacketSize=%x;QPassSignals+;QProgramSignals+;"
2389 "QStartupWithShell+;QEnvironmentHexEncoded+;"
2390 "QEnvironmentReset+;QEnvironmentUnset+",
2393 if (target_supports_catch_syscall ())
2394 strcat (own_buf
, ";QCatchSyscalls+");
2396 if (the_target
->qxfer_libraries_svr4
!= NULL
)
2397 strcat (own_buf
, ";qXfer:libraries-svr4:read+"
2398 ";augmented-libraries-svr4-read+");
2401 /* We do not have any hook to indicate whether the non-SVR4 target
2402 backend supports qXfer:libraries:read, so always report it. */
2403 strcat (own_buf
, ";qXfer:libraries:read+");
2406 if (the_target
->read_auxv
!= NULL
)
2407 strcat (own_buf
, ";qXfer:auxv:read+");
2409 if (the_target
->qxfer_spu
!= NULL
)
2410 strcat (own_buf
, ";qXfer:spu:read+;qXfer:spu:write+");
2412 if (the_target
->qxfer_siginfo
!= NULL
)
2413 strcat (own_buf
, ";qXfer:siginfo:read+;qXfer:siginfo:write+");
2415 if (the_target
->read_loadmap
!= NULL
)
2416 strcat (own_buf
, ";qXfer:fdpic:read+");
2418 /* We always report qXfer:features:read, as targets may
2419 install XML files on a subsequent call to arch_setup.
2420 If we reported to GDB on startup that we don't support
2421 qXfer:feature:read at all, we will never be re-queried. */
2422 strcat (own_buf
, ";qXfer:features:read+");
2424 if (transport_is_reliable
)
2425 strcat (own_buf
, ";QStartNoAckMode+");
2427 if (the_target
->qxfer_osdata
!= NULL
)
2428 strcat (own_buf
, ";qXfer:osdata:read+");
2430 if (target_supports_multi_process ())
2431 strcat (own_buf
, ";multiprocess+");
2433 if (target_supports_fork_events ())
2434 strcat (own_buf
, ";fork-events+");
2436 if (target_supports_vfork_events ())
2437 strcat (own_buf
, ";vfork-events+");
2439 if (target_supports_exec_events ())
2440 strcat (own_buf
, ";exec-events+");
2442 if (target_supports_non_stop ())
2443 strcat (own_buf
, ";QNonStop+");
2445 if (target_supports_disable_randomization ())
2446 strcat (own_buf
, ";QDisableRandomization+");
2448 strcat (own_buf
, ";qXfer:threads:read+");
2450 if (target_supports_tracepoints ())
2452 strcat (own_buf
, ";ConditionalTracepoints+");
2453 strcat (own_buf
, ";TraceStateVariables+");
2454 strcat (own_buf
, ";TracepointSource+");
2455 strcat (own_buf
, ";DisconnectedTracing+");
2456 if (gdb_supports_qRelocInsn
&& target_supports_fast_tracepoints ())
2457 strcat (own_buf
, ";FastTracepoints+");
2458 strcat (own_buf
, ";StaticTracepoints+");
2459 strcat (own_buf
, ";InstallInTrace+");
2460 strcat (own_buf
, ";qXfer:statictrace:read+");
2461 strcat (own_buf
, ";qXfer:traceframe-info:read+");
2462 strcat (own_buf
, ";EnableDisableTracepoints+");
2463 strcat (own_buf
, ";QTBuffer:size+");
2464 strcat (own_buf
, ";tracenz+");
2467 if (target_supports_hardware_single_step ()
2468 || target_supports_software_single_step () )
2470 strcat (own_buf
, ";ConditionalBreakpoints+");
2472 strcat (own_buf
, ";BreakpointCommands+");
2474 if (target_supports_agent ())
2475 strcat (own_buf
, ";QAgent+");
2477 supported_btrace_packets (own_buf
);
2479 if (target_supports_stopped_by_sw_breakpoint ())
2480 strcat (own_buf
, ";swbreak+");
2482 if (target_supports_stopped_by_hw_breakpoint ())
2483 strcat (own_buf
, ";hwbreak+");
2485 if (the_target
->pid_to_exec_file
!= NULL
)
2486 strcat (own_buf
, ";qXfer:exec-file:read+");
2488 strcat (own_buf
, ";vContSupported+");
2490 strcat (own_buf
, ";QThreadEvents+");
2492 strcat (own_buf
, ";no-resumed+");
2494 /* Reinitialize components as needed for the new connection. */
2495 hostio_handle_new_gdb_connection ();
2496 target_handle_new_gdb_connection ();
2501 /* Thread-local storage support. */
2502 if (the_target
->get_tls_address
!= NULL
2503 && startswith (own_buf
, "qGetTLSAddr:"))
2505 char *p
= own_buf
+ 12;
2506 CORE_ADDR parts
[2], address
= 0;
2508 ptid_t ptid
= null_ptid
;
2510 require_running_or_return (own_buf
);
2512 for (i
= 0; i
< 3; i
++)
2520 p2
= strchr (p
, ',');
2533 ptid
= read_ptid (p
, NULL
);
2535 decode_address (&parts
[i
- 1], p
, len
);
2539 if (p
!= NULL
|| i
< 3)
2543 struct thread_info
*thread
= find_thread_ptid (ptid
);
2548 err
= the_target
->get_tls_address (thread
, parts
[0], parts
[1],
2554 strcpy (own_buf
, paddress(address
));
2559 write_enn (own_buf
);
2563 /* Otherwise, pretend we do not understand this packet. */
2566 /* Windows OS Thread Information Block address support. */
2567 if (the_target
->get_tib_address
!= NULL
2568 && startswith (own_buf
, "qGetTIBAddr:"))
2573 ptid_t ptid
= read_ptid (own_buf
+ 12, &annex
);
2575 n
= (*the_target
->get_tib_address
) (ptid
, &tlb
);
2578 strcpy (own_buf
, paddress(tlb
));
2583 write_enn (own_buf
);
2589 /* Handle "monitor" commands. */
2590 if (startswith (own_buf
, "qRcmd,"))
2592 char *mon
= (char *) malloc (PBUFSIZ
);
2593 int len
= strlen (own_buf
+ 6);
2597 write_enn (own_buf
);
2602 || hex2bin (own_buf
+ 6, (gdb_byte
*) mon
, len
/ 2) != len
/ 2)
2604 write_enn (own_buf
);
2608 mon
[len
/ 2] = '\0';
2612 if (the_target
->handle_monitor_command
== NULL
2613 || (*the_target
->handle_monitor_command
) (mon
) == 0)
2614 /* Default processing. */
2615 handle_monitor_command (mon
, own_buf
);
2621 if (startswith (own_buf
, "qSearch:memory:"))
2623 require_running_or_return (own_buf
);
2624 handle_search_memory (own_buf
, packet_len
);
2628 if (strcmp (own_buf
, "qAttached") == 0
2629 || startswith (own_buf
, "qAttached:"))
2631 struct process_info
*process
;
2633 if (own_buf
[sizeof ("qAttached") - 1])
2635 int pid
= strtoul (own_buf
+ sizeof ("qAttached:") - 1, NULL
, 16);
2636 process
= (struct process_info
*)
2637 find_inferior_id (&all_processes
, pid_to_ptid (pid
));
2641 require_running_or_return (own_buf
);
2642 process
= current_process ();
2645 if (process
== NULL
)
2647 write_enn (own_buf
);
2651 strcpy (own_buf
, process
->attached
? "1" : "0");
2655 if (startswith (own_buf
, "qCRC:"))
2657 /* CRC check (compare-section). */
2661 unsigned long long crc
;
2663 require_running_or_return (own_buf
);
2664 comma
= unpack_varlen_hex (own_buf
+ 5, &base
);
2665 if (*comma
++ != ',')
2667 write_enn (own_buf
);
2670 len
= strtoul (comma
, NULL
, 16);
2671 crc
= crc32 (base
, len
, 0xffffffff);
2672 /* Check for memory failure. */
2673 if (crc
== (unsigned long long) -1)
2675 write_enn (own_buf
);
2678 sprintf (own_buf
, "C%lx", (unsigned long) crc
);
2682 if (handle_qxfer (own_buf
, packet_len
, new_packet_len_p
))
2685 if (target_supports_tracepoints () && handle_tracepoint_query (own_buf
))
2688 /* Otherwise we didn't know what packet it was. Say we didn't
2693 static void gdb_wants_all_threads_stopped (void);
2694 static void resume (struct thread_resume
*actions
, size_t n
);
2696 /* The callback that is passed to visit_actioned_threads. */
2697 typedef int (visit_actioned_threads_callback_ftype
)
2698 (const struct thread_resume
*, struct thread_info
*);
2700 /* Struct to pass data to visit_actioned_threads. */
2702 struct visit_actioned_threads_data
2704 const struct thread_resume
*actions
;
2706 visit_actioned_threads_callback_ftype
*callback
;
2709 /* Call CALLBACK for any thread to which ACTIONS applies to. Returns
2710 true if CALLBACK returns true. Returns false if no matching thread
2711 is found or CALLBACK results false.
2712 Note: This function is itself a callback for find_inferior. */
2715 visit_actioned_threads (struct inferior_list_entry
*entry
, void *datap
)
2717 struct visit_actioned_threads_data
*data
2718 = (struct visit_actioned_threads_data
*) datap
;
2719 const struct thread_resume
*actions
= data
->actions
;
2720 size_t num_actions
= data
->num_actions
;
2721 visit_actioned_threads_callback_ftype
*callback
= data
->callback
;
2724 for (i
= 0; i
< num_actions
; i
++)
2726 const struct thread_resume
*action
= &actions
[i
];
2728 if (ptid_equal (action
->thread
, minus_one_ptid
)
2729 || ptid_equal (action
->thread
, entry
->id
)
2730 || ((ptid_get_pid (action
->thread
)
2731 == ptid_get_pid (entry
->id
))
2732 && ptid_get_lwp (action
->thread
) == -1))
2734 struct thread_info
*thread
= (struct thread_info
*) entry
;
2736 if ((*callback
) (action
, thread
))
2744 /* Callback for visit_actioned_threads. If the thread has a pending
2745 status to report, report it now. */
2748 handle_pending_status (const struct thread_resume
*resumption
,
2749 struct thread_info
*thread
)
2751 if (thread
->status_pending_p
)
2753 thread
->status_pending_p
= 0;
2755 last_status
= thread
->last_status
;
2756 last_ptid
= thread
->entry
.id
;
2757 prepare_resume_reply (own_buf
, last_ptid
, &last_status
);
2763 /* Parse vCont packets. */
2765 handle_v_cont (char *own_buf
)
2769 struct thread_resume
*resume_info
;
2770 struct thread_resume default_action
{ null_ptid
};
2772 /* Count the number of semicolons in the packet. There should be one
2773 for every action. */
2779 p
= strchr (p
, ';');
2782 resume_info
= (struct thread_resume
*) malloc (n
* sizeof (resume_info
[0]));
2783 if (resume_info
== NULL
)
2791 memset (&resume_info
[i
], 0, sizeof resume_info
[i
]);
2793 if (p
[0] == 's' || p
[0] == 'S')
2794 resume_info
[i
].kind
= resume_step
;
2795 else if (p
[0] == 'r')
2796 resume_info
[i
].kind
= resume_step
;
2797 else if (p
[0] == 'c' || p
[0] == 'C')
2798 resume_info
[i
].kind
= resume_continue
;
2799 else if (p
[0] == 't')
2800 resume_info
[i
].kind
= resume_stop
;
2804 if (p
[0] == 'S' || p
[0] == 'C')
2807 sig
= strtol (p
+ 1, &q
, 16);
2812 if (!gdb_signal_to_host_p ((enum gdb_signal
) sig
))
2814 resume_info
[i
].sig
= gdb_signal_to_host ((enum gdb_signal
) sig
);
2816 else if (p
[0] == 'r')
2820 p
= unpack_varlen_hex (p
+ 1, &addr
);
2821 resume_info
[i
].step_range_start
= addr
;
2826 p
= unpack_varlen_hex (p
+ 1, &addr
);
2827 resume_info
[i
].step_range_end
= addr
;
2836 resume_info
[i
].thread
= minus_one_ptid
;
2837 default_action
= resume_info
[i
];
2839 /* Note: we don't increment i here, we'll overwrite this entry
2840 the next time through. */
2842 else if (p
[0] == ':')
2844 ptid_t ptid
= read_ptid (p
+ 1, &q
);
2849 if (p
[0] != ';' && p
[0] != 0)
2852 resume_info
[i
].thread
= ptid
;
2859 resume_info
[i
] = default_action
;
2861 resume (resume_info
, n
);
2866 write_enn (own_buf
);
2871 /* Resume target with ACTIONS, an array of NUM_ACTIONS elements. */
2874 resume (struct thread_resume
*actions
, size_t num_actions
)
2878 /* Check if among the threads that GDB wants actioned, there's
2879 one with a pending status to report. If so, skip actually
2880 resuming/stopping and report the pending event
2882 struct visit_actioned_threads_data data
;
2884 data
.actions
= actions
;
2885 data
.num_actions
= num_actions
;
2886 data
.callback
= handle_pending_status
;
2887 if (find_inferior (&all_threads
, visit_actioned_threads
, &data
) != NULL
)
2893 (*the_target
->resume
) (actions
, num_actions
);
2899 last_ptid
= mywait (minus_one_ptid
, &last_status
, 0, 1);
2901 if (last_status
.kind
== TARGET_WAITKIND_NO_RESUMED
2902 && !report_no_resumed
)
2904 /* The client does not support this stop reply. At least
2906 sprintf (own_buf
, "E.No unwaited-for children left.");
2907 disable_async_io ();
2911 if (last_status
.kind
!= TARGET_WAITKIND_EXITED
2912 && last_status
.kind
!= TARGET_WAITKIND_SIGNALLED
2913 && last_status
.kind
!= TARGET_WAITKIND_NO_RESUMED
)
2914 current_thread
->last_status
= last_status
;
2916 /* From the client's perspective, all-stop mode always stops all
2917 threads implicitly (and the target backend has already done
2918 so by now). Tag all threads as "want-stopped", so we don't
2919 resume them implicitly without the client telling us to. */
2920 gdb_wants_all_threads_stopped ();
2921 prepare_resume_reply (own_buf
, last_ptid
, &last_status
);
2922 disable_async_io ();
2924 if (last_status
.kind
== TARGET_WAITKIND_EXITED
2925 || last_status
.kind
== TARGET_WAITKIND_SIGNALLED
)
2926 target_mourn_inferior (last_ptid
);
2930 /* Attach to a new program. Return 1 if successful, 0 if failure. */
2932 handle_v_attach (char *own_buf
)
2936 pid
= strtol (own_buf
+ 8, NULL
, 16);
2937 if (pid
!= 0 && attach_inferior (pid
) == 0)
2939 /* Don't report shared library events after attaching, even if
2940 some libraries are preloaded. GDB will always poll the
2941 library list. Avoids the "stopped by shared library event"
2942 notice on the GDB side. */
2947 /* In non-stop, we don't send a resume reply. Stop events
2948 will follow up using the normal notification
2953 prepare_resume_reply (own_buf
, last_ptid
, &last_status
);
2959 write_enn (own_buf
);
2964 /* Run a new program. Return 1 if successful, 0 if failure. */
2966 handle_v_run (char *own_buf
)
2969 std::vector
<char *> new_argv
;
2970 char *new_program_name
= NULL
;
2974 for (p
= own_buf
+ strlen ("vRun;"); p
&& *p
; p
= strchr (p
, ';'))
2980 for (i
= 0, p
= own_buf
+ strlen ("vRun;"); *p
; p
= next_p
, ++i
)
2982 next_p
= strchr (p
, ';');
2984 next_p
= p
+ strlen (p
);
2986 if (i
== 0 && p
== next_p
)
2988 /* No program specified. */
2989 new_program_name
= NULL
;
2991 else if (p
== next_p
)
2993 /* Empty argument. */
2994 new_argv
.push_back (xstrdup ("''"));
2998 size_t len
= (next_p
- p
) / 2;
2999 /* ARG is the unquoted argument received via the RSP. */
3000 char *arg
= (char *) xmalloc (len
+ 1);
3001 /* FULL_ARGS will contain the quoted version of ARG. */
3002 char *full_arg
= (char *) xmalloc ((len
+ 1) * 2);
3003 /* These are pointers used to navigate the strings above. */
3004 char *tmp_arg
= arg
;
3005 char *tmp_full_arg
= full_arg
;
3008 hex2bin (p
, (gdb_byte
*) arg
, len
);
3011 while (*tmp_arg
!= '\0')
3017 *tmp_full_arg
= '\'';
3023 /* Quote single quote. */
3024 *tmp_full_arg
= '\\';
3032 *tmp_full_arg
= *tmp_arg
;
3038 *tmp_full_arg
++ = '\'';
3040 /* Finish FULL_ARG and push it into the vector containing
3042 *tmp_full_arg
= '\0';
3044 new_program_name
= full_arg
;
3046 new_argv
.push_back (full_arg
);
3052 new_argv
.push_back (NULL
);
3054 if (new_program_name
== NULL
)
3056 /* GDB didn't specify a program to run. Use the program from the
3057 last run with the new argument list. */
3058 if (program_name
== NULL
)
3060 write_enn (own_buf
);
3061 free_vector_argv (new_argv
);
3067 xfree (program_name
);
3068 program_name
= new_program_name
;
3071 /* Free the old argv and install the new one. */
3072 free_vector_argv (program_args
);
3073 program_args
= new_argv
;
3075 create_inferior (program_name
, program_args
);
3077 if (last_status
.kind
== TARGET_WAITKIND_STOPPED
)
3079 prepare_resume_reply (own_buf
, last_ptid
, &last_status
);
3081 /* In non-stop, sending a resume reply doesn't set the general
3082 thread, but GDB assumes a vRun sets it (this is so GDB can
3083 query which is the main thread of the new inferior. */
3085 general_thread
= last_ptid
;
3091 write_enn (own_buf
);
3096 /* Kill process. Return 1 if successful, 0 if failure. */
3098 handle_v_kill (char *own_buf
)
3101 char *p
= &own_buf
[6];
3103 pid
= strtol (p
, NULL
, 16);
3106 if (pid
!= 0 && kill_inferior (pid
) == 0)
3108 last_status
.kind
= TARGET_WAITKIND_SIGNALLED
;
3109 last_status
.value
.sig
= GDB_SIGNAL_KILL
;
3110 last_ptid
= pid_to_ptid (pid
);
3111 discard_queued_stop_replies (last_ptid
);
3117 write_enn (own_buf
);
3122 /* Handle all of the extended 'v' packets. */
3124 handle_v_requests (char *own_buf
, int packet_len
, int *new_packet_len
)
3126 if (!disable_packet_vCont
)
3128 if (strcmp (own_buf
, "vCtrlC") == 0)
3130 (*the_target
->request_interrupt
) ();
3135 if (startswith (own_buf
, "vCont;"))
3137 handle_v_cont (own_buf
);
3141 if (startswith (own_buf
, "vCont?"))
3143 strcpy (own_buf
, "vCont;c;C;t");
3145 if (target_supports_hardware_single_step ()
3146 || target_supports_software_single_step ()
3147 || !vCont_supported
)
3149 /* If target supports single step either by hardware or by
3150 software, add actions s and S to the list of supported
3151 actions. On the other hand, if GDB doesn't request the
3152 supported vCont actions in qSupported packet, add s and
3153 S to the list too. */
3154 own_buf
= own_buf
+ strlen (own_buf
);
3155 strcpy (own_buf
, ";s;S");
3158 if (target_supports_range_stepping ())
3160 own_buf
= own_buf
+ strlen (own_buf
);
3161 strcpy (own_buf
, ";r");
3167 if (startswith (own_buf
, "vFile:")
3168 && handle_vFile (own_buf
, packet_len
, new_packet_len
))
3171 if (startswith (own_buf
, "vAttach;"))
3173 if ((!extended_protocol
|| !multi_process
) && target_running ())
3175 fprintf (stderr
, "Already debugging a process\n");
3176 write_enn (own_buf
);
3179 handle_v_attach (own_buf
);
3183 if (startswith (own_buf
, "vRun;"))
3185 if ((!extended_protocol
|| !multi_process
) && target_running ())
3187 fprintf (stderr
, "Already debugging a process\n");
3188 write_enn (own_buf
);
3191 handle_v_run (own_buf
);
3195 if (startswith (own_buf
, "vKill;"))
3197 if (!target_running ())
3199 fprintf (stderr
, "No process to kill\n");
3200 write_enn (own_buf
);
3203 handle_v_kill (own_buf
);
3207 if (handle_notif_ack (own_buf
, packet_len
))
3210 /* Otherwise we didn't know what packet it was. Say we didn't
3216 /* Resume thread and wait for another event. In non-stop mode,
3217 don't really wait here, but return immediatelly to the event
3220 myresume (char *own_buf
, int step
, int sig
)
3222 struct thread_resume resume_info
[2];
3224 int valid_cont_thread
;
3226 valid_cont_thread
= (!ptid_equal (cont_thread
, null_ptid
)
3227 && !ptid_equal (cont_thread
, minus_one_ptid
));
3229 if (step
|| sig
|| valid_cont_thread
)
3231 resume_info
[0].thread
= current_ptid
;
3233 resume_info
[0].kind
= resume_step
;
3235 resume_info
[0].kind
= resume_continue
;
3236 resume_info
[0].sig
= sig
;
3240 if (!valid_cont_thread
)
3242 resume_info
[n
].thread
= minus_one_ptid
;
3243 resume_info
[n
].kind
= resume_continue
;
3244 resume_info
[n
].sig
= 0;
3248 resume (resume_info
, n
);
3251 /* Callback for for_each_inferior. Make a new stop reply for each
3255 queue_stop_reply_callback (struct inferior_list_entry
*entry
, void *arg
)
3257 struct thread_info
*thread
= (struct thread_info
*) entry
;
3259 /* For now, assume targets that don't have this callback also don't
3260 manage the thread's last_status field. */
3261 if (the_target
->thread_stopped
== NULL
)
3263 struct vstop_notif
*new_notif
= XNEW (struct vstop_notif
);
3265 new_notif
->ptid
= entry
->id
;
3266 new_notif
->status
= thread
->last_status
;
3267 /* Pass the last stop reply back to GDB, but don't notify
3269 notif_event_enque (¬if_stop
,
3270 (struct notif_event
*) new_notif
);
3274 if (thread_stopped (thread
))
3278 std::string status_string
3279 = target_waitstatus_to_string (&thread
->last_status
);
3281 debug_printf ("Reporting thread %s as already stopped with %s\n",
3282 target_pid_to_str (entry
->id
),
3283 status_string
.c_str ());
3286 gdb_assert (thread
->last_status
.kind
!= TARGET_WAITKIND_IGNORE
);
3288 /* Pass the last stop reply back to GDB, but don't notify
3290 queue_stop_reply (entry
->id
, &thread
->last_status
);
3297 /* Set this inferior threads's state as "want-stopped". We won't
3298 resume this thread until the client gives us another action for
3302 gdb_wants_thread_stopped (struct inferior_list_entry
*entry
)
3304 struct thread_info
*thread
= (struct thread_info
*) entry
;
3306 thread
->last_resume_kind
= resume_stop
;
3308 if (thread
->last_status
.kind
== TARGET_WAITKIND_IGNORE
)
3310 /* Most threads are stopped implicitly (all-stop); tag that with
3312 thread
->last_status
.kind
= TARGET_WAITKIND_STOPPED
;
3313 thread
->last_status
.value
.sig
= GDB_SIGNAL_0
;
3317 /* Set all threads' states as "want-stopped". */
3320 gdb_wants_all_threads_stopped (void)
3322 for_each_inferior (&all_threads
, gdb_wants_thread_stopped
);
3325 /* Clear the gdb_detached flag of every process. */
3328 gdb_reattached_process (struct inferior_list_entry
*entry
)
3330 struct process_info
*process
= (struct process_info
*) entry
;
3332 process
->gdb_detached
= 0;
3335 /* Callback for for_each_inferior. Clear the thread's pending status
3339 clear_pending_status_callback (struct inferior_list_entry
*entry
)
3341 struct thread_info
*thread
= (struct thread_info
*) entry
;
3343 thread
->status_pending_p
= 0;
3346 /* Callback for for_each_inferior. If the thread is stopped with an
3347 interesting event, mark it as having a pending event. */
3350 set_pending_status_callback (struct inferior_list_entry
*entry
)
3352 struct thread_info
*thread
= (struct thread_info
*) entry
;
3354 if (thread
->last_status
.kind
!= TARGET_WAITKIND_STOPPED
3355 || (thread
->last_status
.value
.sig
!= GDB_SIGNAL_0
3356 /* A breakpoint, watchpoint or finished step from a previous
3357 GDB run isn't considered interesting for a new GDB run.
3358 If we left those pending, the new GDB could consider them
3359 random SIGTRAPs. This leaves out real async traps. We'd
3360 have to peek into the (target-specific) siginfo to
3361 distinguish those. */
3362 && thread
->last_status
.value
.sig
!= GDB_SIGNAL_TRAP
))
3363 thread
->status_pending_p
= 1;
3366 /* Callback for find_inferior. Return true if ENTRY (a thread) has a
3367 pending status to report to GDB. */
3370 find_status_pending_thread_callback (struct inferior_list_entry
*entry
, void *data
)
3372 struct thread_info
*thread
= (struct thread_info
*) entry
;
3374 return thread
->status_pending_p
;
3377 /* Status handler for the '?' packet. */
3380 handle_status (char *own_buf
)
3382 /* GDB is connected, don't forward events to the target anymore. */
3383 for_each_inferior (&all_processes
, gdb_reattached_process
);
3385 /* In non-stop mode, we must send a stop reply for each stopped
3386 thread. In all-stop mode, just send one for the first stopped
3391 find_inferior (&all_threads
, queue_stop_reply_callback
, NULL
);
3393 /* The first is sent immediatly. OK is sent if there is no
3394 stopped thread, which is the same handling of the vStopped
3395 packet (by design). */
3396 notif_write_event (¬if_stop
, own_buf
);
3400 struct inferior_list_entry
*thread
= NULL
;
3403 stabilize_threads ();
3404 gdb_wants_all_threads_stopped ();
3406 /* We can only report one status, but we might be coming out of
3407 non-stop -- if more than one thread is stopped with
3408 interesting events, leave events for the threads we're not
3409 reporting now pending. They'll be reported the next time the
3410 threads are resumed. Start by marking all interesting events
3412 for_each_inferior (&all_threads
, set_pending_status_callback
);
3414 /* Prefer the last thread that reported an event to GDB (even if
3415 that was a GDB_SIGNAL_TRAP). */
3416 if (last_status
.kind
!= TARGET_WAITKIND_IGNORE
3417 && last_status
.kind
!= TARGET_WAITKIND_EXITED
3418 && last_status
.kind
!= TARGET_WAITKIND_SIGNALLED
)
3419 thread
= find_inferior_id (&all_threads
, last_ptid
);
3421 /* If the last event thread is not found for some reason, look
3422 for some other thread that might have an event to report. */
3424 thread
= find_inferior (&all_threads
,
3425 find_status_pending_thread_callback
, NULL
);
3427 /* If we're still out of luck, simply pick the first thread in
3430 thread
= get_first_inferior (&all_threads
);
3434 struct thread_info
*tp
= (struct thread_info
*) thread
;
3436 /* We're reporting this event, so it's no longer
3438 tp
->status_pending_p
= 0;
3440 /* GDB assumes the current thread is the thread we're
3441 reporting the status for. */
3442 general_thread
= thread
->id
;
3443 set_desired_thread (1);
3445 gdb_assert (tp
->last_status
.kind
!= TARGET_WAITKIND_IGNORE
);
3446 prepare_resume_reply (own_buf
, tp
->entry
.id
, &tp
->last_status
);
3449 strcpy (own_buf
, "W00");
3454 gdbserver_version (void)
3456 printf ("GNU gdbserver %s%s\n"
3457 "Copyright (C) 2017 Free Software Foundation, Inc.\n"
3458 "gdbserver is free software, covered by the "
3459 "GNU General Public License.\n"
3460 "This gdbserver was configured as \"%s\"\n",
3461 PKGVERSION
, version
, host_name
);
3465 gdbserver_usage (FILE *stream
)
3467 fprintf (stream
, "Usage:\tgdbserver [OPTIONS] COMM PROG [ARGS ...]\n"
3468 "\tgdbserver [OPTIONS] --attach COMM PID\n"
3469 "\tgdbserver [OPTIONS] --multi COMM\n"
3471 "COMM may either be a tty device (for serial debugging),\n"
3472 "HOST:PORT to listen for a TCP connection, or '-' or 'stdio' to use \n"
3473 "stdin/stdout of gdbserver.\n"
3474 "PROG is the executable program. ARGS are arguments passed to inferior.\n"
3475 "PID is the process ID to attach to, when --attach is specified.\n"
3477 "Operating modes:\n"
3479 " --attach Attach to running process PID.\n"
3480 " --multi Start server without a specific program, and\n"
3481 " only quit when explicitly commanded.\n"
3482 " --once Exit after the first connection has closed.\n"
3483 " --help Print this message and then exit.\n"
3484 " --version Display version information and exit.\n"
3488 " --wrapper WRAPPER -- Run WRAPPER to start new programs.\n"
3489 " --disable-randomization\n"
3490 " Run PROG with address space randomization disabled.\n"
3491 " --no-disable-randomization\n"
3492 " Don't disable address space randomization when\n"
3494 " --startup-with-shell\n"
3495 " Start PROG using a shell. I.e., execs a shell that\n"
3496 " then execs PROG. (default)\n"
3497 " --no-startup-with-shell\n"
3498 " Exec PROG directly instead of using a shell.\n"
3499 " Disables argument globbing and variable substitution\n"
3500 " on UNIX-like systems.\n"
3504 " --debug Enable general debugging output.\n"
3505 " --debug-format=opt1[,opt2,...]\n"
3506 " Specify extra content in debugging output.\n"
3511 " --remote-debug Enable remote protocol debugging output.\n"
3512 " --disable-packet=opt1[,opt2,...]\n"
3513 " Disable support for RSP packets or features.\n"
3515 " vCont, Tthread, qC, qfThreadInfo and \n"
3516 " threads (disable all threading packets).\n"
3518 "For more information, consult the GDB manual (available as on-line \n"
3519 "info or a printed manual).\n");
3520 if (REPORT_BUGS_TO
[0] && stream
== stdout
)
3521 fprintf (stream
, "Report bugs to \"%s\".\n", REPORT_BUGS_TO
);
3525 gdbserver_show_disableable (FILE *stream
)
3527 fprintf (stream
, "Disableable packets:\n"
3528 " vCont \tAll vCont packets\n"
3529 " qC \tQuerying the current thread\n"
3530 " qfThreadInfo\tThread listing\n"
3531 " Tthread \tPassing the thread specifier in the "
3532 "T stop reply packet\n"
3533 " threads \tAll of the above\n");
3537 kill_inferior_callback (struct inferior_list_entry
*entry
)
3539 struct process_info
*process
= (struct process_info
*) entry
;
3540 int pid
= ptid_get_pid (process
->entry
.id
);
3542 kill_inferior (pid
);
3543 discard_queued_stop_replies (pid_to_ptid (pid
));
3546 /* Callback for for_each_inferior to detach or kill the inferior,
3547 depending on whether we attached to it or not.
3548 We inform the user whether we're detaching or killing the process
3549 as this is only called when gdbserver is about to exit. */
3552 detach_or_kill_inferior_callback (struct inferior_list_entry
*entry
)
3554 struct process_info
*process
= (struct process_info
*) entry
;
3555 int pid
= ptid_get_pid (process
->entry
.id
);
3557 if (process
->attached
)
3558 detach_inferior (pid
);
3560 kill_inferior (pid
);
3562 discard_queued_stop_replies (pid_to_ptid (pid
));
3565 /* for_each_inferior callback for detach_or_kill_for_exit to print
3566 the pids of started inferiors. */
3569 print_started_pid (struct inferior_list_entry
*entry
)
3571 struct process_info
*process
= (struct process_info
*) entry
;
3573 if (! process
->attached
)
3575 int pid
= ptid_get_pid (process
->entry
.id
);
3576 fprintf (stderr
, " %d", pid
);
3580 /* for_each_inferior callback for detach_or_kill_for_exit to print
3581 the pids of attached inferiors. */
3584 print_attached_pid (struct inferior_list_entry
*entry
)
3586 struct process_info
*process
= (struct process_info
*) entry
;
3588 if (process
->attached
)
3590 int pid
= ptid_get_pid (process
->entry
.id
);
3591 fprintf (stderr
, " %d", pid
);
3595 /* Call this when exiting gdbserver with possible inferiors that need
3596 to be killed or detached from. */
3599 detach_or_kill_for_exit (void)
3601 /* First print a list of the inferiors we will be killing/detaching.
3602 This is to assist the user, for example, in case the inferior unexpectedly
3603 dies after we exit: did we screw up or did the inferior exit on its own?
3604 Having this info will save some head-scratching. */
3606 if (have_started_inferiors_p ())
3608 fprintf (stderr
, "Killing process(es):");
3609 for_each_inferior (&all_processes
, print_started_pid
);
3610 fprintf (stderr
, "\n");
3612 if (have_attached_inferiors_p ())
3614 fprintf (stderr
, "Detaching process(es):");
3615 for_each_inferior (&all_processes
, print_attached_pid
);
3616 fprintf (stderr
, "\n");
3619 /* Now we can kill or detach the inferiors. */
3621 for_each_inferior (&all_processes
, detach_or_kill_inferior_callback
);
3624 /* Value that will be passed to exit(3) when gdbserver exits. */
3625 static int exit_code
;
3627 /* Cleanup version of detach_or_kill_for_exit. */
3630 detach_or_kill_for_exit_cleanup (void *ignore
)
3635 detach_or_kill_for_exit ();
3638 CATCH (exception
, RETURN_MASK_ALL
)
3641 fprintf (stderr
, "Detach or kill failed: %s\n", exception
.message
);
3647 /* Main function. This is called by the real "main" function,
3648 wrapped in a TRY_CATCH that handles any uncaught exceptions. */
3650 static void ATTRIBUTE_NORETURN
3651 captured_main (int argc
, char *argv
[])
3656 const char *port
= NULL
;
3657 char **next_arg
= &argv
[1];
3658 volatile int multi_mode
= 0;
3659 volatile int attach
= 0;
3661 bool selftest
= false;
3662 const char *selftest_filter
= NULL
;
3664 while (*next_arg
!= NULL
&& **next_arg
== '-')
3666 if (strcmp (*next_arg
, "--version") == 0)
3668 gdbserver_version ();
3671 else if (strcmp (*next_arg
, "--help") == 0)
3673 gdbserver_usage (stdout
);
3676 else if (strcmp (*next_arg
, "--attach") == 0)
3678 else if (strcmp (*next_arg
, "--multi") == 0)
3680 else if (strcmp (*next_arg
, "--wrapper") == 0)
3687 while (*next_arg
!= NULL
&& strcmp (*next_arg
, "--") != 0)
3689 wrapper_argv
+= *next_arg
;
3690 wrapper_argv
+= ' ';
3694 if (!wrapper_argv
.empty ())
3696 /* Erase the last whitespace. */
3697 wrapper_argv
.erase (wrapper_argv
.end () - 1);
3700 if (next_arg
== tmp
|| *next_arg
== NULL
)
3702 gdbserver_usage (stderr
);
3706 /* Consume the "--". */
3709 else if (strcmp (*next_arg
, "--debug") == 0)
3711 else if (startswith (*next_arg
, "--debug-format="))
3714 = parse_debug_format_options ((*next_arg
)
3715 + sizeof ("--debug-format=") - 1, 0);
3717 if (error_msg
!= NULL
)
3719 fprintf (stderr
, "%s", error_msg
);
3723 else if (strcmp (*next_arg
, "--remote-debug") == 0)
3725 else if (strcmp (*next_arg
, "--disable-packet") == 0)
3727 gdbserver_show_disableable (stdout
);
3730 else if (startswith (*next_arg
, "--disable-packet="))
3732 char *packets
, *tok
;
3734 packets
= *next_arg
+= sizeof ("--disable-packet=") - 1;
3735 for (tok
= strtok (packets
, ",");
3737 tok
= strtok (NULL
, ","))
3739 if (strcmp ("vCont", tok
) == 0)
3740 disable_packet_vCont
= 1;
3741 else if (strcmp ("Tthread", tok
) == 0)
3742 disable_packet_Tthread
= 1;
3743 else if (strcmp ("qC", tok
) == 0)
3744 disable_packet_qC
= 1;
3745 else if (strcmp ("qfThreadInfo", tok
) == 0)
3746 disable_packet_qfThreadInfo
= 1;
3747 else if (strcmp ("threads", tok
) == 0)
3749 disable_packet_vCont
= 1;
3750 disable_packet_Tthread
= 1;
3751 disable_packet_qC
= 1;
3752 disable_packet_qfThreadInfo
= 1;
3756 fprintf (stderr
, "Don't know how to disable \"%s\".\n\n",
3758 gdbserver_show_disableable (stderr
);
3763 else if (strcmp (*next_arg
, "-") == 0)
3765 /* "-" specifies a stdio connection and is a form of port
3767 port
= STDIO_CONNECTION_NAME
;
3771 else if (strcmp (*next_arg
, "--disable-randomization") == 0)
3772 disable_randomization
= 1;
3773 else if (strcmp (*next_arg
, "--no-disable-randomization") == 0)
3774 disable_randomization
= 0;
3775 else if (strcmp (*next_arg
, "--startup-with-shell") == 0)
3776 startup_with_shell
= true;
3777 else if (strcmp (*next_arg
, "--no-startup-with-shell") == 0)
3778 startup_with_shell
= false;
3779 else if (strcmp (*next_arg
, "--once") == 0)
3781 else if (strcmp (*next_arg
, "--selftest") == 0)
3783 else if (startswith (*next_arg
, "--selftest="))
3786 selftest_filter
= *next_arg
+ strlen ("--selftest=");
3790 fprintf (stderr
, "Unknown argument: %s\n", *next_arg
);
3803 if ((port
== NULL
|| (!attach
&& !multi_mode
&& *next_arg
== NULL
))
3806 gdbserver_usage (stderr
);
3810 /* Remember stdio descriptors. LISTEN_DESC must not be listed, it will be
3811 opened by remote_prepare. */
3814 save_original_signals_state ();
3816 /* We need to know whether the remote connection is stdio before
3817 starting the inferior. Inferiors created in this scenario have
3818 stdin,stdout redirected. So do this here before we call
3821 remote_prepare (port
);
3826 /* --attach used to come after PORT, so allow it there for
3828 if (*next_arg
!= NULL
&& strcmp (*next_arg
, "--attach") == 0)
3835 && (*next_arg
== NULL
3836 || (*next_arg
)[0] == '\0'
3837 || (pid
= strtoul (*next_arg
, &arg_end
, 0)) == 0
3839 || next_arg
[1] != NULL
))
3844 gdbserver_usage (stderr
);
3848 /* Gather information about the environment. */
3849 our_environ
= gdb_environ::from_host_environ ();
3851 initialize_async_io ();
3853 have_job_control ();
3854 initialize_event_loop ();
3855 if (target_supports_tracepoints ())
3856 initialize_tracepoint ();
3857 initialize_notif ();
3859 own_buf
= (char *) xmalloc (PBUFSIZ
+ 1);
3860 mem_buf
= (unsigned char *) xmalloc (PBUFSIZ
);
3864 selftests::run_tests (selftest_filter
);
3865 throw_quit ("Quit");
3868 if (pid
== 0 && *next_arg
!= NULL
)
3872 n
= argc
- (next_arg
- argv
);
3873 program_name
= xstrdup (next_arg
[0]);
3874 for (i
= 1; i
< n
; i
++)
3875 program_args
.push_back (xstrdup (next_arg
[i
]));
3876 program_args
.push_back (NULL
);
3878 /* Wait till we are at first instruction in program. */
3879 create_inferior (program_name
, program_args
);
3881 /* We are now (hopefully) stopped at the first instruction of
3882 the target process. This assumes that the target process was
3883 successfully created. */
3887 if (attach_inferior (pid
) == -1)
3888 error ("Attaching not supported on this target");
3890 /* Otherwise succeeded. */
3894 last_status
.kind
= TARGET_WAITKIND_EXITED
;
3895 last_status
.value
.integer
= 0;
3896 last_ptid
= minus_one_ptid
;
3898 make_cleanup (detach_or_kill_for_exit_cleanup
, NULL
);
3900 /* Don't report shared library events on the initial connection,
3901 even if some libraries are preloaded. Avoids the "stopped by
3902 shared library event" notice on gdb side. */
3905 if (last_status
.kind
== TARGET_WAITKIND_EXITED
3906 || last_status
.kind
== TARGET_WAITKIND_SIGNALLED
)
3911 if (!was_running
&& !multi_mode
)
3912 error ("No program to debug");
3919 report_fork_events
= 0;
3920 report_vfork_events
= 0;
3921 report_exec_events
= 0;
3922 /* Be sure we're out of tfind mode. */
3923 current_traceframe
= -1;
3924 cont_thread
= null_ptid
;
3925 swbreak_feature
= 0;
3926 hwbreak_feature
= 0;
3927 vCont_supported
= 0;
3933 /* Wait for events. This will return when all event sources
3934 are removed from the event loop. */
3935 start_event_loop ();
3937 /* If an exit was requested (using the "monitor exit"
3938 command), terminate now. */
3940 throw_quit ("Quit");
3942 /* The only other way to get here is for getpkt to fail:
3944 - If --once was specified, we're done.
3946 - If not in extended-remote mode, and we're no longer
3947 debugging anything, simply exit: GDB has disconnected
3948 after processing the last process exit.
3950 - Otherwise, close the connection and reopen it at the
3952 if (run_once
|| (!extended_protocol
&& !target_running ()))
3953 throw_quit ("Quit");
3956 "Remote side has terminated connection. "
3957 "GDBserver will reopen the connection.\n");
3959 /* Get rid of any pending statuses. An eventual reconnection
3960 (by the same GDB instance or another) will refresh all its
3961 state from scratch. */
3962 discard_queued_stop_replies (minus_one_ptid
);
3963 for_each_inferior (&all_threads
,
3964 clear_pending_status_callback
);
3968 if (disconnected_tracing
)
3970 /* Try to enable non-stop/async mode, so we we can
3971 both wait for an async socket accept, and handle
3972 async target events simultaneously. There's also
3973 no point either in having the target always stop
3974 all threads, when we're going to pass signals
3975 down without informing GDB. */
3978 if (start_non_stop (1))
3981 /* Detaching implicitly resumes all threads;
3982 simply disconnecting does not. */
3988 "Disconnected tracing disabled; "
3989 "stopping trace run.\n");
3994 CATCH (exception
, RETURN_MASK_ERROR
)
3997 fprintf (stderr
, "gdbserver: %s\n", exception
.message
);
3999 if (response_needed
)
4001 write_enn (own_buf
);
4006 throw_quit ("Quit");
4012 /* Main function. */
4015 main (int argc
, char *argv
[])
4020 captured_main (argc
, argv
);
4022 CATCH (exception
, RETURN_MASK_ALL
)
4024 if (exception
.reason
== RETURN_ERROR
)
4027 fprintf (stderr
, "%s\n", exception
.message
);
4028 fprintf (stderr
, "Exiting\n");
4036 gdb_assert_not_reached ("captured_main should never return");
4039 /* Process options coming from Z packets for a breakpoint. PACKET is
4040 the packet buffer. *PACKET is updated to point to the first char
4041 after the last processed option. */
4044 process_point_options (struct gdb_breakpoint
*bp
, char **packet
)
4046 char *dataptr
= *packet
;
4049 /* Check if data has the correct format. */
4050 if (*dataptr
!= ';')
4057 if (*dataptr
== ';')
4060 if (*dataptr
== 'X')
4062 /* Conditional expression. */
4064 debug_printf ("Found breakpoint condition.\n");
4065 if (!add_breakpoint_condition (bp
, &dataptr
))
4066 dataptr
= strchrnul (dataptr
, ';');
4068 else if (startswith (dataptr
, "cmds:"))
4070 dataptr
+= strlen ("cmds:");
4072 debug_printf ("Found breakpoint commands %s.\n", dataptr
);
4073 persist
= (*dataptr
== '1');
4075 if (add_breakpoint_commands (bp
, &dataptr
, persist
))
4076 dataptr
= strchrnul (dataptr
, ';');
4080 fprintf (stderr
, "Unknown token %c, ignoring.\n",
4082 /* Skip tokens until we find one that we recognize. */
4083 dataptr
= strchrnul (dataptr
, ';');
4089 /* Event loop callback that handles a serial event. The first byte in
4090 the serial buffer gets us here. We expect characters to arrive at
4091 a brisk pace, so we read the rest of the packet with a blocking
4095 process_serial_event (void)
4103 int new_packet_len
= -1;
4105 disable_async_io ();
4107 response_needed
= 0;
4108 packet_len
= getpkt (own_buf
);
4109 if (packet_len
<= 0)
4112 /* Force an event loop break. */
4115 response_needed
= 1;
4117 char ch
= own_buf
[0];
4121 handle_query (own_buf
, packet_len
, &new_packet_len
);
4124 handle_general_set (own_buf
);
4127 handle_detach (own_buf
);
4130 extended_protocol
= 1;
4134 handle_status (own_buf
);
4137 if (own_buf
[1] == 'c' || own_buf
[1] == 'g' || own_buf
[1] == 's')
4139 require_running_or_break (own_buf
);
4141 ptid_t thread_id
= read_ptid (&own_buf
[2], NULL
);
4143 if (thread_id
== null_ptid
|| thread_id
== minus_one_ptid
)
4144 thread_id
= null_ptid
;
4145 else if (thread_id
.is_pid ())
4147 /* The ptid represents a pid. */
4148 thread_info
*thread
= find_any_thread_of_pid (thread_id
.pid ());
4152 write_enn (own_buf
);
4156 thread_id
= thread
->entry
.id
;
4160 /* The ptid represents a lwp/tid. */
4161 if (find_thread_ptid (thread_id
) == NULL
)
4163 write_enn (own_buf
);
4168 if (own_buf
[1] == 'g')
4170 if (ptid_equal (thread_id
, null_ptid
))
4172 /* GDB is telling us to choose any thread. Check if
4173 the currently selected thread is still valid. If
4174 it is not, select the first available. */
4175 struct thread_info
*thread
=
4176 (struct thread_info
*) find_inferior_id (&all_threads
,
4179 thread
= get_first_thread ();
4180 thread_id
= thread
->entry
.id
;
4183 general_thread
= thread_id
;
4184 set_desired_thread (1);
4185 gdb_assert (current_thread
!= NULL
);
4187 else if (own_buf
[1] == 'c')
4188 cont_thread
= thread_id
;
4194 /* Silently ignore it so that gdb can extend the protocol
4195 without compatibility headaches. */
4200 require_running_or_break (own_buf
);
4201 if (current_traceframe
>= 0)
4203 struct regcache
*regcache
4204 = new_register_cache (current_target_desc ());
4206 if (fetch_traceframe_registers (current_traceframe
,
4208 registers_to_string (regcache
, own_buf
);
4210 write_enn (own_buf
);
4211 free_register_cache (regcache
);
4215 struct regcache
*regcache
;
4217 if (!set_desired_thread (1))
4218 write_enn (own_buf
);
4221 regcache
= get_thread_regcache (current_thread
, 1);
4222 registers_to_string (regcache
, own_buf
);
4227 require_running_or_break (own_buf
);
4228 if (current_traceframe
>= 0)
4229 write_enn (own_buf
);
4232 struct regcache
*regcache
;
4234 if (!set_desired_thread (1))
4235 write_enn (own_buf
);
4238 regcache
= get_thread_regcache (current_thread
, 1);
4239 registers_from_string (regcache
, &own_buf
[1]);
4245 require_running_or_break (own_buf
);
4246 decode_m_packet (&own_buf
[1], &mem_addr
, &len
);
4247 res
= gdb_read_memory (mem_addr
, mem_buf
, len
);
4249 write_enn (own_buf
);
4251 bin2hex (mem_buf
, own_buf
, res
);
4254 require_running_or_break (own_buf
);
4255 decode_M_packet (&own_buf
[1], &mem_addr
, &len
, &mem_buf
);
4256 if (gdb_write_memory (mem_addr
, mem_buf
, len
) == 0)
4259 write_enn (own_buf
);
4262 require_running_or_break (own_buf
);
4263 if (decode_X_packet (&own_buf
[1], packet_len
- 1,
4264 &mem_addr
, &len
, &mem_buf
) < 0
4265 || gdb_write_memory (mem_addr
, mem_buf
, len
) != 0)
4266 write_enn (own_buf
);
4271 require_running_or_break (own_buf
);
4272 hex2bin (own_buf
+ 1, &sig
, 1);
4273 if (gdb_signal_to_host_p ((enum gdb_signal
) sig
))
4274 signal
= gdb_signal_to_host ((enum gdb_signal
) sig
);
4277 myresume (own_buf
, 0, signal
);
4280 require_running_or_break (own_buf
);
4281 hex2bin (own_buf
+ 1, &sig
, 1);
4282 if (gdb_signal_to_host_p ((enum gdb_signal
) sig
))
4283 signal
= gdb_signal_to_host ((enum gdb_signal
) sig
);
4286 myresume (own_buf
, 1, signal
);
4289 require_running_or_break (own_buf
);
4291 myresume (own_buf
, 0, signal
);
4294 require_running_or_break (own_buf
);
4296 myresume (own_buf
, 1, signal
);
4298 case 'Z': /* insert_ ... */
4300 case 'z': /* remove_ ... */
4305 char type
= own_buf
[1];
4307 const int insert
= ch
== 'Z';
4308 char *p
= &own_buf
[3];
4310 p
= unpack_varlen_hex (p
, &addr
);
4311 kind
= strtol (p
+ 1, &dataptr
, 16);
4315 struct gdb_breakpoint
*bp
;
4317 bp
= set_gdb_breakpoint (type
, addr
, kind
, &res
);
4322 /* GDB may have sent us a list of *point parameters to
4323 be evaluated on the target's side. Read such list
4324 here. If we already have a list of parameters, GDB
4325 is telling us to drop that list and use this one
4327 clear_breakpoint_conditions_and_commands (bp
);
4328 process_point_options (bp
, &dataptr
);
4332 res
= delete_gdb_breakpoint (type
, addr
, kind
);
4340 write_enn (own_buf
);
4344 response_needed
= 0;
4345 if (!target_running ())
4346 /* The packet we received doesn't make sense - but we can't
4347 reply to it, either. */
4350 fprintf (stderr
, "Killing all inferiors\n");
4351 for_each_inferior (&all_processes
, kill_inferior_callback
);
4353 /* When using the extended protocol, we wait with no program
4354 running. The traditional protocol will exit instead. */
4355 if (extended_protocol
)
4357 last_status
.kind
= TARGET_WAITKIND_EXITED
;
4358 last_status
.value
.sig
= GDB_SIGNAL_KILL
;
4366 require_running_or_break (own_buf
);
4368 ptid_t thread_id
= read_ptid (&own_buf
[1], NULL
);
4369 if (find_thread_ptid (thread_id
) == NULL
)
4371 write_enn (own_buf
);
4375 if (mythread_alive (thread_id
))
4378 write_enn (own_buf
);
4382 response_needed
= 0;
4384 /* Restarting the inferior is only supported in the extended
4386 if (extended_protocol
)
4388 if (target_running ())
4389 for_each_inferior (&all_processes
,
4390 kill_inferior_callback
);
4391 fprintf (stderr
, "GDBserver restarting\n");
4393 /* Wait till we are at 1st instruction in prog. */
4394 if (program_name
!= NULL
)
4396 create_inferior (program_name
, program_args
);
4398 if (last_status
.kind
== TARGET_WAITKIND_STOPPED
)
4400 /* Stopped at the first instruction of the target
4402 general_thread
= last_ptid
;
4406 /* Something went wrong. */
4407 general_thread
= null_ptid
;
4412 last_status
.kind
= TARGET_WAITKIND_EXITED
;
4413 last_status
.value
.sig
= GDB_SIGNAL_KILL
;
4419 /* It is a request we don't understand. Respond with an
4420 empty packet so that gdb knows that we don't support this
4426 /* Extended (long) request. */
4427 handle_v_requests (own_buf
, packet_len
, &new_packet_len
);
4431 /* It is a request we don't understand. Respond with an empty
4432 packet so that gdb knows that we don't support this
4438 if (new_packet_len
!= -1)
4439 putpkt_binary (own_buf
, new_packet_len
);
4443 response_needed
= 0;
4451 /* Event-loop callback for serial events. */
4454 handle_serial_event (int err
, gdb_client_data client_data
)
4457 debug_printf ("handling possible serial event\n");
4459 /* Really handle it. */
4460 if (process_serial_event () < 0)
4463 /* Be sure to not change the selected thread behind GDB's back.
4464 Important in the non-stop mode asynchronous protocol. */
4465 set_desired_thread (1);
4470 /* Push a stop notification on the notification queue. */
4473 push_stop_notification (ptid_t ptid
, struct target_waitstatus
*status
)
4475 struct vstop_notif
*vstop_notif
= XNEW (struct vstop_notif
);
4477 vstop_notif
->status
= *status
;
4478 vstop_notif
->ptid
= ptid
;
4479 /* Push Stop notification. */
4480 notif_push (¬if_stop
, (struct notif_event
*) vstop_notif
);
4483 /* Event-loop callback for target events. */
4486 handle_target_event (int err
, gdb_client_data client_data
)
4489 debug_printf ("handling possible target event\n");
4491 last_ptid
= mywait (minus_one_ptid
, &last_status
,
4494 if (last_status
.kind
== TARGET_WAITKIND_NO_RESUMED
)
4496 if (gdb_connected () && report_no_resumed
)
4497 push_stop_notification (null_ptid
, &last_status
);
4499 else if (last_status
.kind
!= TARGET_WAITKIND_IGNORE
)
4501 int pid
= ptid_get_pid (last_ptid
);
4502 struct process_info
*process
= find_process_pid (pid
);
4503 int forward_event
= !gdb_connected () || process
->gdb_detached
;
4505 if (last_status
.kind
== TARGET_WAITKIND_EXITED
4506 || last_status
.kind
== TARGET_WAITKIND_SIGNALLED
)
4508 mark_breakpoints_out (process
);
4509 target_mourn_inferior (last_ptid
);
4511 else if (last_status
.kind
== TARGET_WAITKIND_THREAD_EXITED
)
4515 /* We're reporting this thread as stopped. Update its
4516 "want-stopped" state to what the client wants, until it
4517 gets a new resume action. */
4518 current_thread
->last_resume_kind
= resume_stop
;
4519 current_thread
->last_status
= last_status
;
4524 if (!target_running ())
4526 /* The last process exited. We're done. */
4530 if (last_status
.kind
== TARGET_WAITKIND_EXITED
4531 || last_status
.kind
== TARGET_WAITKIND_SIGNALLED
4532 || last_status
.kind
== TARGET_WAITKIND_THREAD_EXITED
)
4536 /* A thread stopped with a signal, but gdb isn't
4537 connected to handle it. Pass it down to the
4538 inferior, as if it wasn't being traced. */
4539 enum gdb_signal signal
;
4542 debug_printf ("GDB not connected; forwarding event %d for"
4544 (int) last_status
.kind
,
4545 target_pid_to_str (last_ptid
));
4547 if (last_status
.kind
== TARGET_WAITKIND_STOPPED
)
4548 signal
= last_status
.value
.sig
;
4550 signal
= GDB_SIGNAL_0
;
4551 target_continue (last_ptid
, signal
);
4555 push_stop_notification (last_ptid
, &last_status
);
4558 /* Be sure to not change the selected thread behind GDB's back.
4559 Important in the non-stop mode asynchronous protocol. */
4560 set_desired_thread (1);
4573 } // namespace selftests
4574 #endif /* GDB_SELF_TEST */