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 ())
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 ())
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 Emit the XML to describe the library in INF. */
1515 emit_dll_description (struct inferior_list_entry
*inf
, void *arg
)
1517 struct dll_info
*dll
= (struct dll_info
*) inf
;
1518 std::string
*document
= (std::string
*) arg
;
1519 std::string name
= xml_escape_text (dll
->name
);
1521 *document
+= string_printf
1522 (" <library name=\"%s\"><segment address=\"0x%lx\"/></library>\n",
1523 name
.c_str (), (long) dll
->base_addr
);
1526 /* Handle qXfer:libraries:read. */
1529 handle_qxfer_libraries (const char *annex
,
1530 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1531 ULONGEST offset
, LONGEST len
)
1533 if (writebuf
!= NULL
)
1536 if (annex
[0] != '\0' || current_thread
== NULL
)
1539 std::string document
= "<library-list version=\"1.0\">\n";
1541 for_each_inferior_with_data (&all_dlls
, emit_dll_description
, &document
);
1543 document
+= "</library-list>\n";
1545 if (offset
> document
.length ())
1548 if (offset
+ len
> document
.length ())
1549 len
= document
.length () - offset
;
1551 memcpy (readbuf
, &document
[offset
], len
);
1556 /* Handle qXfer:libraries-svr4:read. */
1559 handle_qxfer_libraries_svr4 (const char *annex
,
1560 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1561 ULONGEST offset
, LONGEST len
)
1563 if (writebuf
!= NULL
)
1566 if (current_thread
== NULL
|| the_target
->qxfer_libraries_svr4
== NULL
)
1569 return the_target
->qxfer_libraries_svr4 (annex
, readbuf
, writebuf
, offset
, len
);
1572 /* Handle qXfer:osadata:read. */
1575 handle_qxfer_osdata (const char *annex
,
1576 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1577 ULONGEST offset
, LONGEST len
)
1579 if (the_target
->qxfer_osdata
== NULL
|| writebuf
!= NULL
)
1582 return (*the_target
->qxfer_osdata
) (annex
, readbuf
, NULL
, offset
, len
);
1585 /* Handle qXfer:siginfo:read and qXfer:siginfo:write. */
1588 handle_qxfer_siginfo (const char *annex
,
1589 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1590 ULONGEST offset
, LONGEST len
)
1592 if (the_target
->qxfer_siginfo
== NULL
)
1595 if (annex
[0] != '\0' || current_thread
== NULL
)
1598 return (*the_target
->qxfer_siginfo
) (annex
, readbuf
, writebuf
, offset
, len
);
1601 /* Handle qXfer:spu:read and qXfer:spu:write. */
1604 handle_qxfer_spu (const char *annex
,
1605 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1606 ULONGEST offset
, LONGEST len
)
1608 if (the_target
->qxfer_spu
== NULL
)
1611 if (current_thread
== NULL
)
1614 return (*the_target
->qxfer_spu
) (annex
, readbuf
, writebuf
, offset
, len
);
1617 /* Handle qXfer:statictrace:read. */
1620 handle_qxfer_statictrace (const char *annex
,
1621 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1622 ULONGEST offset
, LONGEST len
)
1626 if (writebuf
!= NULL
)
1629 if (annex
[0] != '\0' || current_thread
== NULL
|| current_traceframe
== -1)
1632 if (traceframe_read_sdata (current_traceframe
, offset
,
1633 readbuf
, len
, &nbytes
))
1638 /* Helper for handle_qxfer_threads_proper.
1639 Emit the XML to describe the thread of INF. */
1642 handle_qxfer_threads_worker (struct inferior_list_entry
*inf
, void *arg
)
1644 struct thread_info
*thread
= (struct thread_info
*) inf
;
1645 struct buffer
*buffer
= (struct buffer
*) arg
;
1646 ptid_t ptid
= ptid_of (thread
);
1648 int core
= target_core_of_thread (ptid
);
1650 const char *name
= target_thread_name (ptid
);
1652 write_ptid (ptid_s
, ptid
);
1654 buffer_xml_printf (buffer
, "<thread id=\"%s\"", ptid_s
);
1658 sprintf (core_s
, "%d", core
);
1659 buffer_xml_printf (buffer
, " core=\"%s\"", core_s
);
1663 buffer_xml_printf (buffer
, " name=\"%s\"", name
);
1665 buffer_xml_printf (buffer
, "/>\n");
1668 /* Helper for handle_qxfer_threads. */
1671 handle_qxfer_threads_proper (struct buffer
*buffer
)
1673 buffer_grow_str (buffer
, "<threads>\n");
1675 for_each_inferior_with_data (&all_threads
, handle_qxfer_threads_worker
,
1678 buffer_grow_str0 (buffer
, "</threads>\n");
1681 /* Handle qXfer:threads:read. */
1684 handle_qxfer_threads (const char *annex
,
1685 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1686 ULONGEST offset
, LONGEST len
)
1688 static char *result
= 0;
1689 static unsigned int result_length
= 0;
1691 if (writebuf
!= NULL
)
1694 if (annex
[0] != '\0')
1699 struct buffer buffer
;
1700 /* When asked for data at offset 0, generate everything and store into
1701 'result'. Successive reads will be served off 'result'. */
1705 buffer_init (&buffer
);
1707 handle_qxfer_threads_proper (&buffer
);
1709 result
= buffer_finish (&buffer
);
1710 result_length
= strlen (result
);
1711 buffer_free (&buffer
);
1714 if (offset
>= result_length
)
1716 /* We're out of data. */
1723 if (len
> result_length
- offset
)
1724 len
= result_length
- offset
;
1726 memcpy (readbuf
, result
+ offset
, len
);
1731 /* Handle qXfer:traceframe-info:read. */
1734 handle_qxfer_traceframe_info (const char *annex
,
1735 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1736 ULONGEST offset
, LONGEST len
)
1738 static char *result
= 0;
1739 static unsigned int result_length
= 0;
1741 if (writebuf
!= NULL
)
1744 if (!target_running () || annex
[0] != '\0' || current_traceframe
== -1)
1749 struct buffer buffer
;
1751 /* When asked for data at offset 0, generate everything and
1752 store into 'result'. Successive reads will be served off
1756 buffer_init (&buffer
);
1758 traceframe_read_info (current_traceframe
, &buffer
);
1760 result
= buffer_finish (&buffer
);
1761 result_length
= strlen (result
);
1762 buffer_free (&buffer
);
1765 if (offset
>= result_length
)
1767 /* We're out of data. */
1774 if (len
> result_length
- offset
)
1775 len
= result_length
- offset
;
1777 memcpy (readbuf
, result
+ offset
, len
);
1781 /* Handle qXfer:fdpic:read. */
1784 handle_qxfer_fdpic (const char *annex
, gdb_byte
*readbuf
,
1785 const gdb_byte
*writebuf
, ULONGEST offset
, LONGEST len
)
1787 if (the_target
->read_loadmap
== NULL
)
1790 if (current_thread
== NULL
)
1793 return (*the_target
->read_loadmap
) (annex
, offset
, readbuf
, len
);
1796 /* Handle qXfer:btrace:read. */
1799 handle_qxfer_btrace (const char *annex
,
1800 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1801 ULONGEST offset
, LONGEST len
)
1803 static struct buffer cache
;
1804 struct thread_info
*thread
;
1805 enum btrace_read_type type
;
1808 if (the_target
->read_btrace
== NULL
|| writebuf
!= NULL
)
1811 if (ptid_equal (general_thread
, null_ptid
)
1812 || ptid_equal (general_thread
, minus_one_ptid
))
1814 strcpy (own_buf
, "E.Must select a single thread.");
1818 thread
= find_thread_ptid (general_thread
);
1821 strcpy (own_buf
, "E.No such thread.");
1825 if (thread
->btrace
== NULL
)
1827 strcpy (own_buf
, "E.Btrace not enabled.");
1831 if (strcmp (annex
, "all") == 0)
1832 type
= BTRACE_READ_ALL
;
1833 else if (strcmp (annex
, "new") == 0)
1834 type
= BTRACE_READ_NEW
;
1835 else if (strcmp (annex
, "delta") == 0)
1836 type
= BTRACE_READ_DELTA
;
1839 strcpy (own_buf
, "E.Bad annex.");
1845 buffer_free (&cache
);
1847 result
= target_read_btrace (thread
->btrace
, &cache
, type
);
1850 memcpy (own_buf
, cache
.buffer
, cache
.used_size
);
1854 else if (offset
> cache
.used_size
)
1856 buffer_free (&cache
);
1860 if (len
> cache
.used_size
- offset
)
1861 len
= cache
.used_size
- offset
;
1863 memcpy (readbuf
, cache
.buffer
+ offset
, len
);
1868 /* Handle qXfer:btrace-conf:read. */
1871 handle_qxfer_btrace_conf (const char *annex
,
1872 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1873 ULONGEST offset
, LONGEST len
)
1875 static struct buffer cache
;
1876 struct thread_info
*thread
;
1879 if (the_target
->read_btrace_conf
== NULL
|| writebuf
!= NULL
)
1882 if (annex
[0] != '\0')
1885 if (ptid_equal (general_thread
, null_ptid
)
1886 || ptid_equal (general_thread
, minus_one_ptid
))
1888 strcpy (own_buf
, "E.Must select a single thread.");
1892 thread
= find_thread_ptid (general_thread
);
1895 strcpy (own_buf
, "E.No such thread.");
1899 if (thread
->btrace
== NULL
)
1901 strcpy (own_buf
, "E.Btrace not enabled.");
1907 buffer_free (&cache
);
1909 result
= target_read_btrace_conf (thread
->btrace
, &cache
);
1912 memcpy (own_buf
, cache
.buffer
, cache
.used_size
);
1916 else if (offset
> cache
.used_size
)
1918 buffer_free (&cache
);
1922 if (len
> cache
.used_size
- offset
)
1923 len
= cache
.used_size
- offset
;
1925 memcpy (readbuf
, cache
.buffer
+ offset
, len
);
1930 static const struct qxfer qxfer_packets
[] =
1932 { "auxv", handle_qxfer_auxv
},
1933 { "btrace", handle_qxfer_btrace
},
1934 { "btrace-conf", handle_qxfer_btrace_conf
},
1935 { "exec-file", handle_qxfer_exec_file
},
1936 { "fdpic", handle_qxfer_fdpic
},
1937 { "features", handle_qxfer_features
},
1938 { "libraries", handle_qxfer_libraries
},
1939 { "libraries-svr4", handle_qxfer_libraries_svr4
},
1940 { "osdata", handle_qxfer_osdata
},
1941 { "siginfo", handle_qxfer_siginfo
},
1942 { "spu", handle_qxfer_spu
},
1943 { "statictrace", handle_qxfer_statictrace
},
1944 { "threads", handle_qxfer_threads
},
1945 { "traceframe-info", handle_qxfer_traceframe_info
},
1949 handle_qxfer (char *own_buf
, int packet_len
, int *new_packet_len_p
)
1957 if (!startswith (own_buf
, "qXfer:"))
1960 /* Grab the object, r/w and annex. */
1961 if (decode_xfer (own_buf
+ 6, &object
, &rw
, &annex
, &offset
) < 0)
1963 write_enn (own_buf
);
1968 i
< sizeof (qxfer_packets
) / sizeof (qxfer_packets
[0]);
1971 const struct qxfer
*q
= &qxfer_packets
[i
];
1973 if (strcmp (object
, q
->object
) == 0)
1975 if (strcmp (rw
, "read") == 0)
1977 unsigned char *data
;
1982 /* Grab the offset and length. */
1983 if (decode_xfer_read (offset
, &ofs
, &len
) < 0)
1985 write_enn (own_buf
);
1989 /* Read one extra byte, as an indicator of whether there is
1991 if (len
> PBUFSIZ
- 2)
1993 data
= (unsigned char *) malloc (len
+ 1);
1996 write_enn (own_buf
);
1999 n
= (*q
->xfer
) (annex
, data
, NULL
, ofs
, len
+ 1);
2007 /* Preserve error message. */
2010 write_enn (own_buf
);
2012 *new_packet_len_p
= write_qxfer_response (own_buf
, data
, len
, 1);
2014 *new_packet_len_p
= write_qxfer_response (own_buf
, data
, n
, 0);
2019 else if (strcmp (rw
, "write") == 0)
2024 unsigned char *data
;
2026 strcpy (own_buf
, "E00");
2027 data
= (unsigned char *) malloc (packet_len
- (offset
- own_buf
));
2030 write_enn (own_buf
);
2033 if (decode_xfer_write (offset
, packet_len
- (offset
- own_buf
),
2034 &ofs
, &len
, data
) < 0)
2037 write_enn (own_buf
);
2041 n
= (*q
->xfer
) (annex
, NULL
, data
, ofs
, len
);
2049 /* Preserve error message. */
2052 write_enn (own_buf
);
2054 sprintf (own_buf
, "%x", n
);
2067 /* Compute 32 bit CRC from inferior memory.
2069 On success, return 32 bit CRC.
2070 On failure, return (unsigned long long) -1. */
2072 static unsigned long long
2073 crc32 (CORE_ADDR base
, int len
, unsigned int crc
)
2077 unsigned char byte
= 0;
2079 /* Return failure if memory read fails. */
2080 if (read_inferior_memory (base
, &byte
, 1) != 0)
2081 return (unsigned long long) -1;
2083 crc
= xcrc32 (&byte
, 1, crc
);
2086 return (unsigned long long) crc
;
2089 /* Add supported btrace packets to BUF. */
2092 supported_btrace_packets (char *buf
)
2094 int btrace_supported
= 0;
2096 if (target_supports_btrace (BTRACE_FORMAT_BTS
))
2098 strcat (buf
, ";Qbtrace:bts+");
2099 strcat (buf
, ";Qbtrace-conf:bts:size+");
2101 btrace_supported
= 1;
2104 if (target_supports_btrace (BTRACE_FORMAT_PT
))
2106 strcat (buf
, ";Qbtrace:pt+");
2107 strcat (buf
, ";Qbtrace-conf:pt:size+");
2109 btrace_supported
= 1;
2112 if (!btrace_supported
)
2115 strcat (buf
, ";Qbtrace:off+");
2116 strcat (buf
, ";qXfer:btrace:read+");
2117 strcat (buf
, ";qXfer:btrace-conf:read+");
2120 /* Handle all of the extended 'q' packets. */
2123 handle_query (char *own_buf
, int packet_len
, int *new_packet_len_p
)
2125 static struct inferior_list_entry
*thread_ptr
;
2127 /* Reply the current thread id. */
2128 if (strcmp ("qC", own_buf
) == 0 && !disable_packet_qC
)
2131 require_running_or_return (own_buf
);
2133 if (general_thread
!= null_ptid
&& general_thread
!= minus_one_ptid
)
2134 ptid
= general_thread
;
2137 thread_ptr
= get_first_inferior (&all_threads
);
2138 ptid
= thread_ptr
->id
;
2141 sprintf (own_buf
, "QC");
2143 write_ptid (own_buf
, ptid
);
2147 if (strcmp ("qSymbol::", own_buf
) == 0)
2149 struct thread_info
*save_thread
= current_thread
;
2151 /* For qSymbol, GDB only changes the current thread if the
2152 previous current thread was of a different process. So if
2153 the previous thread is gone, we need to pick another one of
2154 the same process. This can happen e.g., if we followed an
2155 exec in a non-leader thread. */
2156 if (current_thread
== NULL
)
2159 = find_any_thread_of_pid (ptid_get_pid (general_thread
));
2161 /* Just in case, if we didn't find a thread, then bail out
2162 instead of crashing. */
2163 if (current_thread
== NULL
)
2165 write_enn (own_buf
);
2166 current_thread
= save_thread
;
2171 /* GDB is suggesting new symbols have been loaded. This may
2172 mean a new shared library has been detected as loaded, so
2173 take the opportunity to check if breakpoints we think are
2174 inserted, still are. Note that it isn't guaranteed that
2175 we'll see this when a shared library is loaded, and nor will
2176 we see this for unloads (although breakpoints in unloaded
2177 libraries shouldn't trigger), as GDB may not find symbols for
2178 the library at all. We also re-validate breakpoints when we
2179 see a second GDB breakpoint for the same address, and or when
2180 we access breakpoint shadows. */
2181 validate_breakpoints ();
2183 if (target_supports_tracepoints ())
2184 tracepoint_look_up_symbols ();
2186 if (current_thread
!= NULL
&& the_target
->look_up_symbols
!= NULL
)
2187 (*the_target
->look_up_symbols
) ();
2189 current_thread
= save_thread
;
2191 strcpy (own_buf
, "OK");
2195 if (!disable_packet_qfThreadInfo
)
2197 if (strcmp ("qfThreadInfo", own_buf
) == 0)
2199 require_running_or_return (own_buf
);
2200 thread_ptr
= get_first_inferior (&all_threads
);
2203 write_ptid (own_buf
, thread_ptr
->id
);
2204 thread_ptr
= thread_ptr
->next
;
2208 if (strcmp ("qsThreadInfo", own_buf
) == 0)
2210 require_running_or_return (own_buf
);
2211 if (thread_ptr
!= NULL
)
2214 write_ptid (own_buf
, thread_ptr
->id
);
2215 thread_ptr
= thread_ptr
->next
;
2220 sprintf (own_buf
, "l");
2226 if (the_target
->read_offsets
!= NULL
2227 && strcmp ("qOffsets", own_buf
) == 0)
2229 CORE_ADDR text
, data
;
2231 require_running_or_return (own_buf
);
2232 if (the_target
->read_offsets (&text
, &data
))
2233 sprintf (own_buf
, "Text=%lX;Data=%lX;Bss=%lX",
2234 (long)text
, (long)data
, (long)data
);
2236 write_enn (own_buf
);
2241 /* Protocol features query. */
2242 if (startswith (own_buf
, "qSupported")
2243 && (own_buf
[10] == ':' || own_buf
[10] == '\0'))
2245 char *p
= &own_buf
[10];
2246 int gdb_supports_qRelocInsn
= 0;
2248 /* Process each feature being provided by GDB. The first
2249 feature will follow a ':', and latter features will follow
2253 char **qsupported
= NULL
;
2258 /* Two passes, to avoid nested strtok calls in
2259 target_process_qsupported. */
2260 for (p
= strtok (p
+ 1, ";");
2262 p
= strtok (NULL
, ";"))
2265 qsupported
= XRESIZEVEC (char *, qsupported
, count
);
2266 qsupported
[count
- 1] = xstrdup (p
);
2269 for (i
= 0; i
< count
; i
++)
2272 if (strcmp (p
, "multiprocess+") == 0)
2274 /* GDB supports and wants multi-process support if
2276 if (target_supports_multi_process ())
2279 else if (strcmp (p
, "qRelocInsn+") == 0)
2281 /* GDB supports relocate instruction requests. */
2282 gdb_supports_qRelocInsn
= 1;
2284 else if (strcmp (p
, "swbreak+") == 0)
2286 /* GDB wants us to report whether a trap is caused
2287 by a software breakpoint and for us to handle PC
2288 adjustment if necessary on this target. */
2289 if (target_supports_stopped_by_sw_breakpoint ())
2290 swbreak_feature
= 1;
2292 else if (strcmp (p
, "hwbreak+") == 0)
2294 /* GDB wants us to report whether a trap is caused
2295 by a hardware breakpoint. */
2296 if (target_supports_stopped_by_hw_breakpoint ())
2297 hwbreak_feature
= 1;
2299 else if (strcmp (p
, "fork-events+") == 0)
2301 /* GDB supports and wants fork events if possible. */
2302 if (target_supports_fork_events ())
2303 report_fork_events
= 1;
2305 else if (strcmp (p
, "vfork-events+") == 0)
2307 /* GDB supports and wants vfork events if possible. */
2308 if (target_supports_vfork_events ())
2309 report_vfork_events
= 1;
2311 else if (strcmp (p
, "exec-events+") == 0)
2313 /* GDB supports and wants exec events if possible. */
2314 if (target_supports_exec_events ())
2315 report_exec_events
= 1;
2317 else if (strcmp (p
, "vContSupported+") == 0)
2318 vCont_supported
= 1;
2319 else if (strcmp (p
, "QThreadEvents+") == 0)
2321 else if (strcmp (p
, "no-resumed+") == 0)
2323 /* GDB supports and wants TARGET_WAITKIND_NO_RESUMED
2325 report_no_resumed
= 1;
2329 /* Move the unknown features all together. */
2330 qsupported
[i
] = NULL
;
2331 qsupported
[unknown
] = p
;
2336 /* Give the target backend a chance to process the unknown
2338 target_process_qsupported (qsupported
, unknown
);
2340 for (i
= 0; i
< count
; i
++)
2341 free (qsupported
[i
]);
2346 "PacketSize=%x;QPassSignals+;QProgramSignals+;"
2347 "QStartupWithShell+;QEnvironmentHexEncoded+;"
2348 "QEnvironmentReset+;QEnvironmentUnset+",
2351 if (target_supports_catch_syscall ())
2352 strcat (own_buf
, ";QCatchSyscalls+");
2354 if (the_target
->qxfer_libraries_svr4
!= NULL
)
2355 strcat (own_buf
, ";qXfer:libraries-svr4:read+"
2356 ";augmented-libraries-svr4-read+");
2359 /* We do not have any hook to indicate whether the non-SVR4 target
2360 backend supports qXfer:libraries:read, so always report it. */
2361 strcat (own_buf
, ";qXfer:libraries:read+");
2364 if (the_target
->read_auxv
!= NULL
)
2365 strcat (own_buf
, ";qXfer:auxv:read+");
2367 if (the_target
->qxfer_spu
!= NULL
)
2368 strcat (own_buf
, ";qXfer:spu:read+;qXfer:spu:write+");
2370 if (the_target
->qxfer_siginfo
!= NULL
)
2371 strcat (own_buf
, ";qXfer:siginfo:read+;qXfer:siginfo:write+");
2373 if (the_target
->read_loadmap
!= NULL
)
2374 strcat (own_buf
, ";qXfer:fdpic:read+");
2376 /* We always report qXfer:features:read, as targets may
2377 install XML files on a subsequent call to arch_setup.
2378 If we reported to GDB on startup that we don't support
2379 qXfer:feature:read at all, we will never be re-queried. */
2380 strcat (own_buf
, ";qXfer:features:read+");
2382 if (transport_is_reliable
)
2383 strcat (own_buf
, ";QStartNoAckMode+");
2385 if (the_target
->qxfer_osdata
!= NULL
)
2386 strcat (own_buf
, ";qXfer:osdata:read+");
2388 if (target_supports_multi_process ())
2389 strcat (own_buf
, ";multiprocess+");
2391 if (target_supports_fork_events ())
2392 strcat (own_buf
, ";fork-events+");
2394 if (target_supports_vfork_events ())
2395 strcat (own_buf
, ";vfork-events+");
2397 if (target_supports_exec_events ())
2398 strcat (own_buf
, ";exec-events+");
2400 if (target_supports_non_stop ())
2401 strcat (own_buf
, ";QNonStop+");
2403 if (target_supports_disable_randomization ())
2404 strcat (own_buf
, ";QDisableRandomization+");
2406 strcat (own_buf
, ";qXfer:threads:read+");
2408 if (target_supports_tracepoints ())
2410 strcat (own_buf
, ";ConditionalTracepoints+");
2411 strcat (own_buf
, ";TraceStateVariables+");
2412 strcat (own_buf
, ";TracepointSource+");
2413 strcat (own_buf
, ";DisconnectedTracing+");
2414 if (gdb_supports_qRelocInsn
&& target_supports_fast_tracepoints ())
2415 strcat (own_buf
, ";FastTracepoints+");
2416 strcat (own_buf
, ";StaticTracepoints+");
2417 strcat (own_buf
, ";InstallInTrace+");
2418 strcat (own_buf
, ";qXfer:statictrace:read+");
2419 strcat (own_buf
, ";qXfer:traceframe-info:read+");
2420 strcat (own_buf
, ";EnableDisableTracepoints+");
2421 strcat (own_buf
, ";QTBuffer:size+");
2422 strcat (own_buf
, ";tracenz+");
2425 if (target_supports_hardware_single_step ()
2426 || target_supports_software_single_step () )
2428 strcat (own_buf
, ";ConditionalBreakpoints+");
2430 strcat (own_buf
, ";BreakpointCommands+");
2432 if (target_supports_agent ())
2433 strcat (own_buf
, ";QAgent+");
2435 supported_btrace_packets (own_buf
);
2437 if (target_supports_stopped_by_sw_breakpoint ())
2438 strcat (own_buf
, ";swbreak+");
2440 if (target_supports_stopped_by_hw_breakpoint ())
2441 strcat (own_buf
, ";hwbreak+");
2443 if (the_target
->pid_to_exec_file
!= NULL
)
2444 strcat (own_buf
, ";qXfer:exec-file:read+");
2446 strcat (own_buf
, ";vContSupported+");
2448 strcat (own_buf
, ";QThreadEvents+");
2450 strcat (own_buf
, ";no-resumed+");
2452 /* Reinitialize components as needed for the new connection. */
2453 hostio_handle_new_gdb_connection ();
2454 target_handle_new_gdb_connection ();
2459 /* Thread-local storage support. */
2460 if (the_target
->get_tls_address
!= NULL
2461 && startswith (own_buf
, "qGetTLSAddr:"))
2463 char *p
= own_buf
+ 12;
2464 CORE_ADDR parts
[2], address
= 0;
2466 ptid_t ptid
= null_ptid
;
2468 require_running_or_return (own_buf
);
2470 for (i
= 0; i
< 3; i
++)
2478 p2
= strchr (p
, ',');
2491 ptid
= read_ptid (p
, NULL
);
2493 decode_address (&parts
[i
- 1], p
, len
);
2497 if (p
!= NULL
|| i
< 3)
2501 struct thread_info
*thread
= find_thread_ptid (ptid
);
2506 err
= the_target
->get_tls_address (thread
, parts
[0], parts
[1],
2512 strcpy (own_buf
, paddress(address
));
2517 write_enn (own_buf
);
2521 /* Otherwise, pretend we do not understand this packet. */
2524 /* Windows OS Thread Information Block address support. */
2525 if (the_target
->get_tib_address
!= NULL
2526 && startswith (own_buf
, "qGetTIBAddr:"))
2531 ptid_t ptid
= read_ptid (own_buf
+ 12, &annex
);
2533 n
= (*the_target
->get_tib_address
) (ptid
, &tlb
);
2536 strcpy (own_buf
, paddress(tlb
));
2541 write_enn (own_buf
);
2547 /* Handle "monitor" commands. */
2548 if (startswith (own_buf
, "qRcmd,"))
2550 char *mon
= (char *) malloc (PBUFSIZ
);
2551 int len
= strlen (own_buf
+ 6);
2555 write_enn (own_buf
);
2560 || hex2bin (own_buf
+ 6, (gdb_byte
*) mon
, len
/ 2) != len
/ 2)
2562 write_enn (own_buf
);
2566 mon
[len
/ 2] = '\0';
2570 if (the_target
->handle_monitor_command
== NULL
2571 || (*the_target
->handle_monitor_command
) (mon
) == 0)
2572 /* Default processing. */
2573 handle_monitor_command (mon
, own_buf
);
2579 if (startswith (own_buf
, "qSearch:memory:"))
2581 require_running_or_return (own_buf
);
2582 handle_search_memory (own_buf
, packet_len
);
2586 if (strcmp (own_buf
, "qAttached") == 0
2587 || startswith (own_buf
, "qAttached:"))
2589 struct process_info
*process
;
2591 if (own_buf
[sizeof ("qAttached") - 1])
2593 int pid
= strtoul (own_buf
+ sizeof ("qAttached:") - 1, NULL
, 16);
2594 process
= (struct process_info
*)
2595 find_inferior_id (&all_processes
, pid_to_ptid (pid
));
2599 require_running_or_return (own_buf
);
2600 process
= current_process ();
2603 if (process
== NULL
)
2605 write_enn (own_buf
);
2609 strcpy (own_buf
, process
->attached
? "1" : "0");
2613 if (startswith (own_buf
, "qCRC:"))
2615 /* CRC check (compare-section). */
2619 unsigned long long crc
;
2621 require_running_or_return (own_buf
);
2622 comma
= unpack_varlen_hex (own_buf
+ 5, &base
);
2623 if (*comma
++ != ',')
2625 write_enn (own_buf
);
2628 len
= strtoul (comma
, NULL
, 16);
2629 crc
= crc32 (base
, len
, 0xffffffff);
2630 /* Check for memory failure. */
2631 if (crc
== (unsigned long long) -1)
2633 write_enn (own_buf
);
2636 sprintf (own_buf
, "C%lx", (unsigned long) crc
);
2640 if (handle_qxfer (own_buf
, packet_len
, new_packet_len_p
))
2643 if (target_supports_tracepoints () && handle_tracepoint_query (own_buf
))
2646 /* Otherwise we didn't know what packet it was. Say we didn't
2651 static void gdb_wants_all_threads_stopped (void);
2652 static void resume (struct thread_resume
*actions
, size_t n
);
2654 /* The callback that is passed to visit_actioned_threads. */
2655 typedef int (visit_actioned_threads_callback_ftype
)
2656 (const struct thread_resume
*, struct thread_info
*);
2658 /* Struct to pass data to visit_actioned_threads. */
2660 struct visit_actioned_threads_data
2662 const struct thread_resume
*actions
;
2664 visit_actioned_threads_callback_ftype
*callback
;
2667 /* Call CALLBACK for any thread to which ACTIONS applies to. Returns
2668 true if CALLBACK returns true. Returns false if no matching thread
2669 is found or CALLBACK results false.
2670 Note: This function is itself a callback for find_inferior. */
2673 visit_actioned_threads (struct inferior_list_entry
*entry
, void *datap
)
2675 struct visit_actioned_threads_data
*data
2676 = (struct visit_actioned_threads_data
*) datap
;
2677 const struct thread_resume
*actions
= data
->actions
;
2678 size_t num_actions
= data
->num_actions
;
2679 visit_actioned_threads_callback_ftype
*callback
= data
->callback
;
2682 for (i
= 0; i
< num_actions
; i
++)
2684 const struct thread_resume
*action
= &actions
[i
];
2686 if (ptid_equal (action
->thread
, minus_one_ptid
)
2687 || ptid_equal (action
->thread
, entry
->id
)
2688 || ((ptid_get_pid (action
->thread
)
2689 == ptid_get_pid (entry
->id
))
2690 && ptid_get_lwp (action
->thread
) == -1))
2692 struct thread_info
*thread
= (struct thread_info
*) entry
;
2694 if ((*callback
) (action
, thread
))
2702 /* Callback for visit_actioned_threads. If the thread has a pending
2703 status to report, report it now. */
2706 handle_pending_status (const struct thread_resume
*resumption
,
2707 struct thread_info
*thread
)
2709 if (thread
->status_pending_p
)
2711 thread
->status_pending_p
= 0;
2713 last_status
= thread
->last_status
;
2714 last_ptid
= thread
->entry
.id
;
2715 prepare_resume_reply (own_buf
, last_ptid
, &last_status
);
2721 /* Parse vCont packets. */
2723 handle_v_cont (char *own_buf
)
2727 struct thread_resume
*resume_info
;
2728 struct thread_resume default_action
{ null_ptid
};
2730 /* Count the number of semicolons in the packet. There should be one
2731 for every action. */
2737 p
= strchr (p
, ';');
2740 resume_info
= (struct thread_resume
*) malloc (n
* sizeof (resume_info
[0]));
2741 if (resume_info
== NULL
)
2749 memset (&resume_info
[i
], 0, sizeof resume_info
[i
]);
2751 if (p
[0] == 's' || p
[0] == 'S')
2752 resume_info
[i
].kind
= resume_step
;
2753 else if (p
[0] == 'r')
2754 resume_info
[i
].kind
= resume_step
;
2755 else if (p
[0] == 'c' || p
[0] == 'C')
2756 resume_info
[i
].kind
= resume_continue
;
2757 else if (p
[0] == 't')
2758 resume_info
[i
].kind
= resume_stop
;
2762 if (p
[0] == 'S' || p
[0] == 'C')
2765 sig
= strtol (p
+ 1, &q
, 16);
2770 if (!gdb_signal_to_host_p ((enum gdb_signal
) sig
))
2772 resume_info
[i
].sig
= gdb_signal_to_host ((enum gdb_signal
) sig
);
2774 else if (p
[0] == 'r')
2778 p
= unpack_varlen_hex (p
+ 1, &addr
);
2779 resume_info
[i
].step_range_start
= addr
;
2784 p
= unpack_varlen_hex (p
+ 1, &addr
);
2785 resume_info
[i
].step_range_end
= addr
;
2794 resume_info
[i
].thread
= minus_one_ptid
;
2795 default_action
= resume_info
[i
];
2797 /* Note: we don't increment i here, we'll overwrite this entry
2798 the next time through. */
2800 else if (p
[0] == ':')
2802 ptid_t ptid
= read_ptid (p
+ 1, &q
);
2807 if (p
[0] != ';' && p
[0] != 0)
2810 resume_info
[i
].thread
= ptid
;
2817 resume_info
[i
] = default_action
;
2819 resume (resume_info
, n
);
2824 write_enn (own_buf
);
2829 /* Resume target with ACTIONS, an array of NUM_ACTIONS elements. */
2832 resume (struct thread_resume
*actions
, size_t num_actions
)
2836 /* Check if among the threads that GDB wants actioned, there's
2837 one with a pending status to report. If so, skip actually
2838 resuming/stopping and report the pending event
2840 struct visit_actioned_threads_data data
;
2842 data
.actions
= actions
;
2843 data
.num_actions
= num_actions
;
2844 data
.callback
= handle_pending_status
;
2845 if (find_inferior (&all_threads
, visit_actioned_threads
, &data
) != NULL
)
2851 (*the_target
->resume
) (actions
, num_actions
);
2857 last_ptid
= mywait (minus_one_ptid
, &last_status
, 0, 1);
2859 if (last_status
.kind
== TARGET_WAITKIND_NO_RESUMED
2860 && !report_no_resumed
)
2862 /* The client does not support this stop reply. At least
2864 sprintf (own_buf
, "E.No unwaited-for children left.");
2865 disable_async_io ();
2869 if (last_status
.kind
!= TARGET_WAITKIND_EXITED
2870 && last_status
.kind
!= TARGET_WAITKIND_SIGNALLED
2871 && last_status
.kind
!= TARGET_WAITKIND_NO_RESUMED
)
2872 current_thread
->last_status
= last_status
;
2874 /* From the client's perspective, all-stop mode always stops all
2875 threads implicitly (and the target backend has already done
2876 so by now). Tag all threads as "want-stopped", so we don't
2877 resume them implicitly without the client telling us to. */
2878 gdb_wants_all_threads_stopped ();
2879 prepare_resume_reply (own_buf
, last_ptid
, &last_status
);
2880 disable_async_io ();
2882 if (last_status
.kind
== TARGET_WAITKIND_EXITED
2883 || last_status
.kind
== TARGET_WAITKIND_SIGNALLED
)
2884 target_mourn_inferior (last_ptid
);
2888 /* Attach to a new program. Return 1 if successful, 0 if failure. */
2890 handle_v_attach (char *own_buf
)
2894 pid
= strtol (own_buf
+ 8, NULL
, 16);
2895 if (pid
!= 0 && attach_inferior (pid
) == 0)
2897 /* Don't report shared library events after attaching, even if
2898 some libraries are preloaded. GDB will always poll the
2899 library list. Avoids the "stopped by shared library event"
2900 notice on the GDB side. */
2905 /* In non-stop, we don't send a resume reply. Stop events
2906 will follow up using the normal notification
2911 prepare_resume_reply (own_buf
, last_ptid
, &last_status
);
2917 write_enn (own_buf
);
2922 /* Run a new program. Return 1 if successful, 0 if failure. */
2924 handle_v_run (char *own_buf
)
2927 std::vector
<char *> new_argv
;
2928 char *new_program_name
= NULL
;
2932 for (p
= own_buf
+ strlen ("vRun;"); p
&& *p
; p
= strchr (p
, ';'))
2938 for (i
= 0, p
= own_buf
+ strlen ("vRun;"); *p
; p
= next_p
, ++i
)
2940 next_p
= strchr (p
, ';');
2942 next_p
= p
+ strlen (p
);
2944 if (i
== 0 && p
== next_p
)
2946 /* No program specified. */
2947 new_program_name
= NULL
;
2949 else if (p
== next_p
)
2951 /* Empty argument. */
2952 new_argv
.push_back (xstrdup ("''"));
2956 size_t len
= (next_p
- p
) / 2;
2957 /* ARG is the unquoted argument received via the RSP. */
2958 char *arg
= (char *) xmalloc (len
+ 1);
2959 /* FULL_ARGS will contain the quoted version of ARG. */
2960 char *full_arg
= (char *) xmalloc ((len
+ 1) * 2);
2961 /* These are pointers used to navigate the strings above. */
2962 char *tmp_arg
= arg
;
2963 char *tmp_full_arg
= full_arg
;
2966 hex2bin (p
, (gdb_byte
*) arg
, len
);
2969 while (*tmp_arg
!= '\0')
2975 *tmp_full_arg
= '\'';
2981 /* Quote single quote. */
2982 *tmp_full_arg
= '\\';
2990 *tmp_full_arg
= *tmp_arg
;
2996 *tmp_full_arg
++ = '\'';
2998 /* Finish FULL_ARG and push it into the vector containing
3000 *tmp_full_arg
= '\0';
3002 new_program_name
= full_arg
;
3004 new_argv
.push_back (full_arg
);
3010 new_argv
.push_back (NULL
);
3012 if (new_program_name
== NULL
)
3014 /* GDB didn't specify a program to run. Use the program from the
3015 last run with the new argument list. */
3016 if (program_name
== NULL
)
3018 write_enn (own_buf
);
3019 free_vector_argv (new_argv
);
3025 xfree (program_name
);
3026 program_name
= new_program_name
;
3029 /* Free the old argv and install the new one. */
3030 free_vector_argv (program_args
);
3031 program_args
= new_argv
;
3033 create_inferior (program_name
, program_args
);
3035 if (last_status
.kind
== TARGET_WAITKIND_STOPPED
)
3037 prepare_resume_reply (own_buf
, last_ptid
, &last_status
);
3039 /* In non-stop, sending a resume reply doesn't set the general
3040 thread, but GDB assumes a vRun sets it (this is so GDB can
3041 query which is the main thread of the new inferior. */
3043 general_thread
= last_ptid
;
3049 write_enn (own_buf
);
3054 /* Kill process. Return 1 if successful, 0 if failure. */
3056 handle_v_kill (char *own_buf
)
3059 char *p
= &own_buf
[6];
3061 pid
= strtol (p
, NULL
, 16);
3064 if (pid
!= 0 && kill_inferior (pid
) == 0)
3066 last_status
.kind
= TARGET_WAITKIND_SIGNALLED
;
3067 last_status
.value
.sig
= GDB_SIGNAL_KILL
;
3068 last_ptid
= pid_to_ptid (pid
);
3069 discard_queued_stop_replies (last_ptid
);
3075 write_enn (own_buf
);
3080 /* Handle all of the extended 'v' packets. */
3082 handle_v_requests (char *own_buf
, int packet_len
, int *new_packet_len
)
3084 if (!disable_packet_vCont
)
3086 if (strcmp (own_buf
, "vCtrlC") == 0)
3088 (*the_target
->request_interrupt
) ();
3093 if (startswith (own_buf
, "vCont;"))
3095 handle_v_cont (own_buf
);
3099 if (startswith (own_buf
, "vCont?"))
3101 strcpy (own_buf
, "vCont;c;C;t");
3103 if (target_supports_hardware_single_step ()
3104 || target_supports_software_single_step ()
3105 || !vCont_supported
)
3107 /* If target supports single step either by hardware or by
3108 software, add actions s and S to the list of supported
3109 actions. On the other hand, if GDB doesn't request the
3110 supported vCont actions in qSupported packet, add s and
3111 S to the list too. */
3112 own_buf
= own_buf
+ strlen (own_buf
);
3113 strcpy (own_buf
, ";s;S");
3116 if (target_supports_range_stepping ())
3118 own_buf
= own_buf
+ strlen (own_buf
);
3119 strcpy (own_buf
, ";r");
3125 if (startswith (own_buf
, "vFile:")
3126 && handle_vFile (own_buf
, packet_len
, new_packet_len
))
3129 if (startswith (own_buf
, "vAttach;"))
3131 if ((!extended_protocol
|| !multi_process
) && target_running ())
3133 fprintf (stderr
, "Already debugging a process\n");
3134 write_enn (own_buf
);
3137 handle_v_attach (own_buf
);
3141 if (startswith (own_buf
, "vRun;"))
3143 if ((!extended_protocol
|| !multi_process
) && target_running ())
3145 fprintf (stderr
, "Already debugging a process\n");
3146 write_enn (own_buf
);
3149 handle_v_run (own_buf
);
3153 if (startswith (own_buf
, "vKill;"))
3155 if (!target_running ())
3157 fprintf (stderr
, "No process to kill\n");
3158 write_enn (own_buf
);
3161 handle_v_kill (own_buf
);
3165 if (handle_notif_ack (own_buf
, packet_len
))
3168 /* Otherwise we didn't know what packet it was. Say we didn't
3174 /* Resume thread and wait for another event. In non-stop mode,
3175 don't really wait here, but return immediatelly to the event
3178 myresume (char *own_buf
, int step
, int sig
)
3180 struct thread_resume resume_info
[2];
3182 int valid_cont_thread
;
3184 valid_cont_thread
= (!ptid_equal (cont_thread
, null_ptid
)
3185 && !ptid_equal (cont_thread
, minus_one_ptid
));
3187 if (step
|| sig
|| valid_cont_thread
)
3189 resume_info
[0].thread
= current_ptid
;
3191 resume_info
[0].kind
= resume_step
;
3193 resume_info
[0].kind
= resume_continue
;
3194 resume_info
[0].sig
= sig
;
3198 if (!valid_cont_thread
)
3200 resume_info
[n
].thread
= minus_one_ptid
;
3201 resume_info
[n
].kind
= resume_continue
;
3202 resume_info
[n
].sig
= 0;
3206 resume (resume_info
, n
);
3209 /* Callback for for_each_inferior. Make a new stop reply for each
3213 queue_stop_reply_callback (struct inferior_list_entry
*entry
, void *arg
)
3215 struct thread_info
*thread
= (struct thread_info
*) entry
;
3217 /* For now, assume targets that don't have this callback also don't
3218 manage the thread's last_status field. */
3219 if (the_target
->thread_stopped
== NULL
)
3221 struct vstop_notif
*new_notif
= XNEW (struct vstop_notif
);
3223 new_notif
->ptid
= entry
->id
;
3224 new_notif
->status
= thread
->last_status
;
3225 /* Pass the last stop reply back to GDB, but don't notify
3227 notif_event_enque (¬if_stop
,
3228 (struct notif_event
*) new_notif
);
3232 if (thread_stopped (thread
))
3236 std::string status_string
3237 = target_waitstatus_to_string (&thread
->last_status
);
3239 debug_printf ("Reporting thread %s as already stopped with %s\n",
3240 target_pid_to_str (entry
->id
),
3241 status_string
.c_str ());
3244 gdb_assert (thread
->last_status
.kind
!= TARGET_WAITKIND_IGNORE
);
3246 /* Pass the last stop reply back to GDB, but don't notify
3248 queue_stop_reply (entry
->id
, &thread
->last_status
);
3255 /* Set this inferior threads's state as "want-stopped". We won't
3256 resume this thread until the client gives us another action for
3260 gdb_wants_thread_stopped (struct inferior_list_entry
*entry
)
3262 struct thread_info
*thread
= (struct thread_info
*) entry
;
3264 thread
->last_resume_kind
= resume_stop
;
3266 if (thread
->last_status
.kind
== TARGET_WAITKIND_IGNORE
)
3268 /* Most threads are stopped implicitly (all-stop); tag that with
3270 thread
->last_status
.kind
= TARGET_WAITKIND_STOPPED
;
3271 thread
->last_status
.value
.sig
= GDB_SIGNAL_0
;
3275 /* Set all threads' states as "want-stopped". */
3278 gdb_wants_all_threads_stopped (void)
3280 for_each_inferior (&all_threads
, gdb_wants_thread_stopped
);
3283 /* Clear the gdb_detached flag of every process. */
3286 gdb_reattached_process (struct inferior_list_entry
*entry
)
3288 struct process_info
*process
= (struct process_info
*) entry
;
3290 process
->gdb_detached
= 0;
3293 /* Callback for for_each_inferior. Clear the thread's pending status
3297 clear_pending_status_callback (struct inferior_list_entry
*entry
)
3299 struct thread_info
*thread
= (struct thread_info
*) entry
;
3301 thread
->status_pending_p
= 0;
3304 /* Callback for for_each_inferior. If the thread is stopped with an
3305 interesting event, mark it as having a pending event. */
3308 set_pending_status_callback (struct inferior_list_entry
*entry
)
3310 struct thread_info
*thread
= (struct thread_info
*) entry
;
3312 if (thread
->last_status
.kind
!= TARGET_WAITKIND_STOPPED
3313 || (thread
->last_status
.value
.sig
!= GDB_SIGNAL_0
3314 /* A breakpoint, watchpoint or finished step from a previous
3315 GDB run isn't considered interesting for a new GDB run.
3316 If we left those pending, the new GDB could consider them
3317 random SIGTRAPs. This leaves out real async traps. We'd
3318 have to peek into the (target-specific) siginfo to
3319 distinguish those. */
3320 && thread
->last_status
.value
.sig
!= GDB_SIGNAL_TRAP
))
3321 thread
->status_pending_p
= 1;
3324 /* Callback for find_inferior. Return true if ENTRY (a thread) has a
3325 pending status to report to GDB. */
3328 find_status_pending_thread_callback (struct inferior_list_entry
*entry
, void *data
)
3330 struct thread_info
*thread
= (struct thread_info
*) entry
;
3332 return thread
->status_pending_p
;
3335 /* Status handler for the '?' packet. */
3338 handle_status (char *own_buf
)
3340 /* GDB is connected, don't forward events to the target anymore. */
3341 for_each_inferior (&all_processes
, gdb_reattached_process
);
3343 /* In non-stop mode, we must send a stop reply for each stopped
3344 thread. In all-stop mode, just send one for the first stopped
3349 find_inferior (&all_threads
, queue_stop_reply_callback
, NULL
);
3351 /* The first is sent immediatly. OK is sent if there is no
3352 stopped thread, which is the same handling of the vStopped
3353 packet (by design). */
3354 notif_write_event (¬if_stop
, own_buf
);
3358 struct inferior_list_entry
*thread
= NULL
;
3361 stabilize_threads ();
3362 gdb_wants_all_threads_stopped ();
3364 /* We can only report one status, but we might be coming out of
3365 non-stop -- if more than one thread is stopped with
3366 interesting events, leave events for the threads we're not
3367 reporting now pending. They'll be reported the next time the
3368 threads are resumed. Start by marking all interesting events
3370 for_each_inferior (&all_threads
, set_pending_status_callback
);
3372 /* Prefer the last thread that reported an event to GDB (even if
3373 that was a GDB_SIGNAL_TRAP). */
3374 if (last_status
.kind
!= TARGET_WAITKIND_IGNORE
3375 && last_status
.kind
!= TARGET_WAITKIND_EXITED
3376 && last_status
.kind
!= TARGET_WAITKIND_SIGNALLED
)
3377 thread
= find_inferior_id (&all_threads
, last_ptid
);
3379 /* If the last event thread is not found for some reason, look
3380 for some other thread that might have an event to report. */
3382 thread
= find_inferior (&all_threads
,
3383 find_status_pending_thread_callback
, NULL
);
3385 /* If we're still out of luck, simply pick the first thread in
3388 thread
= get_first_inferior (&all_threads
);
3392 struct thread_info
*tp
= (struct thread_info
*) thread
;
3394 /* We're reporting this event, so it's no longer
3396 tp
->status_pending_p
= 0;
3398 /* GDB assumes the current thread is the thread we're
3399 reporting the status for. */
3400 general_thread
= thread
->id
;
3401 set_desired_thread ();
3403 gdb_assert (tp
->last_status
.kind
!= TARGET_WAITKIND_IGNORE
);
3404 prepare_resume_reply (own_buf
, tp
->entry
.id
, &tp
->last_status
);
3407 strcpy (own_buf
, "W00");
3412 gdbserver_version (void)
3414 printf ("GNU gdbserver %s%s\n"
3415 "Copyright (C) 2017 Free Software Foundation, Inc.\n"
3416 "gdbserver is free software, covered by the "
3417 "GNU General Public License.\n"
3418 "This gdbserver was configured as \"%s\"\n",
3419 PKGVERSION
, version
, host_name
);
3423 gdbserver_usage (FILE *stream
)
3425 fprintf (stream
, "Usage:\tgdbserver [OPTIONS] COMM PROG [ARGS ...]\n"
3426 "\tgdbserver [OPTIONS] --attach COMM PID\n"
3427 "\tgdbserver [OPTIONS] --multi COMM\n"
3429 "COMM may either be a tty device (for serial debugging),\n"
3430 "HOST:PORT to listen for a TCP connection, or '-' or 'stdio' to use \n"
3431 "stdin/stdout of gdbserver.\n"
3432 "PROG is the executable program. ARGS are arguments passed to inferior.\n"
3433 "PID is the process ID to attach to, when --attach is specified.\n"
3435 "Operating modes:\n"
3437 " --attach Attach to running process PID.\n"
3438 " --multi Start server without a specific program, and\n"
3439 " only quit when explicitly commanded.\n"
3440 " --once Exit after the first connection has closed.\n"
3441 " --help Print this message and then exit.\n"
3442 " --version Display version information and exit.\n"
3446 " --wrapper WRAPPER -- Run WRAPPER to start new programs.\n"
3447 " --disable-randomization\n"
3448 " Run PROG with address space randomization disabled.\n"
3449 " --no-disable-randomization\n"
3450 " Don't disable address space randomization when\n"
3452 " --startup-with-shell\n"
3453 " Start PROG using a shell. I.e., execs a shell that\n"
3454 " then execs PROG. (default)\n"
3455 " --no-startup-with-shell\n"
3456 " Exec PROG directly instead of using a shell.\n"
3457 " Disables argument globbing and variable substitution\n"
3458 " on UNIX-like systems.\n"
3462 " --debug Enable general debugging output.\n"
3463 " --debug-format=opt1[,opt2,...]\n"
3464 " Specify extra content in debugging output.\n"
3469 " --remote-debug Enable remote protocol debugging output.\n"
3470 " --disable-packet=opt1[,opt2,...]\n"
3471 " Disable support for RSP packets or features.\n"
3473 " vCont, Tthread, qC, qfThreadInfo and \n"
3474 " threads (disable all threading packets).\n"
3476 "For more information, consult the GDB manual (available as on-line \n"
3477 "info or a printed manual).\n");
3478 if (REPORT_BUGS_TO
[0] && stream
== stdout
)
3479 fprintf (stream
, "Report bugs to \"%s\".\n", REPORT_BUGS_TO
);
3483 gdbserver_show_disableable (FILE *stream
)
3485 fprintf (stream
, "Disableable packets:\n"
3486 " vCont \tAll vCont packets\n"
3487 " qC \tQuerying the current thread\n"
3488 " qfThreadInfo\tThread listing\n"
3489 " Tthread \tPassing the thread specifier in the "
3490 "T stop reply packet\n"
3491 " threads \tAll of the above\n");
3495 kill_inferior_callback (struct inferior_list_entry
*entry
)
3497 struct process_info
*process
= (struct process_info
*) entry
;
3498 int pid
= ptid_get_pid (process
->entry
.id
);
3500 kill_inferior (pid
);
3501 discard_queued_stop_replies (pid_to_ptid (pid
));
3504 /* Callback for for_each_inferior to detach or kill the inferior,
3505 depending on whether we attached to it or not.
3506 We inform the user whether we're detaching or killing the process
3507 as this is only called when gdbserver is about to exit. */
3510 detach_or_kill_inferior_callback (struct inferior_list_entry
*entry
)
3512 struct process_info
*process
= (struct process_info
*) entry
;
3513 int pid
= ptid_get_pid (process
->entry
.id
);
3515 if (process
->attached
)
3516 detach_inferior (pid
);
3518 kill_inferior (pid
);
3520 discard_queued_stop_replies (pid_to_ptid (pid
));
3523 /* for_each_inferior callback for detach_or_kill_for_exit to print
3524 the pids of started inferiors. */
3527 print_started_pid (struct inferior_list_entry
*entry
)
3529 struct process_info
*process
= (struct process_info
*) entry
;
3531 if (! process
->attached
)
3533 int pid
= ptid_get_pid (process
->entry
.id
);
3534 fprintf (stderr
, " %d", pid
);
3538 /* for_each_inferior callback for detach_or_kill_for_exit to print
3539 the pids of attached inferiors. */
3542 print_attached_pid (struct inferior_list_entry
*entry
)
3544 struct process_info
*process
= (struct process_info
*) entry
;
3546 if (process
->attached
)
3548 int pid
= ptid_get_pid (process
->entry
.id
);
3549 fprintf (stderr
, " %d", pid
);
3553 /* Call this when exiting gdbserver with possible inferiors that need
3554 to be killed or detached from. */
3557 detach_or_kill_for_exit (void)
3559 /* First print a list of the inferiors we will be killing/detaching.
3560 This is to assist the user, for example, in case the inferior unexpectedly
3561 dies after we exit: did we screw up or did the inferior exit on its own?
3562 Having this info will save some head-scratching. */
3564 if (have_started_inferiors_p ())
3566 fprintf (stderr
, "Killing process(es):");
3567 for_each_inferior (&all_processes
, print_started_pid
);
3568 fprintf (stderr
, "\n");
3570 if (have_attached_inferiors_p ())
3572 fprintf (stderr
, "Detaching process(es):");
3573 for_each_inferior (&all_processes
, print_attached_pid
);
3574 fprintf (stderr
, "\n");
3577 /* Now we can kill or detach the inferiors. */
3579 for_each_inferior (&all_processes
, detach_or_kill_inferior_callback
);
3582 /* Value that will be passed to exit(3) when gdbserver exits. */
3583 static int exit_code
;
3585 /* Cleanup version of detach_or_kill_for_exit. */
3588 detach_or_kill_for_exit_cleanup (void *ignore
)
3593 detach_or_kill_for_exit ();
3596 CATCH (exception
, RETURN_MASK_ALL
)
3599 fprintf (stderr
, "Detach or kill failed: %s\n", exception
.message
);
3605 /* Main function. This is called by the real "main" function,
3606 wrapped in a TRY_CATCH that handles any uncaught exceptions. */
3608 static void ATTRIBUTE_NORETURN
3609 captured_main (int argc
, char *argv
[])
3614 const char *port
= NULL
;
3615 char **next_arg
= &argv
[1];
3616 volatile int multi_mode
= 0;
3617 volatile int attach
= 0;
3619 bool selftest
= false;
3620 const char *selftest_filter
= NULL
;
3622 while (*next_arg
!= NULL
&& **next_arg
== '-')
3624 if (strcmp (*next_arg
, "--version") == 0)
3626 gdbserver_version ();
3629 else if (strcmp (*next_arg
, "--help") == 0)
3631 gdbserver_usage (stdout
);
3634 else if (strcmp (*next_arg
, "--attach") == 0)
3636 else if (strcmp (*next_arg
, "--multi") == 0)
3638 else if (strcmp (*next_arg
, "--wrapper") == 0)
3645 while (*next_arg
!= NULL
&& strcmp (*next_arg
, "--") != 0)
3647 wrapper_argv
+= *next_arg
;
3648 wrapper_argv
+= ' ';
3652 if (!wrapper_argv
.empty ())
3654 /* Erase the last whitespace. */
3655 wrapper_argv
.erase (wrapper_argv
.end () - 1);
3658 if (next_arg
== tmp
|| *next_arg
== NULL
)
3660 gdbserver_usage (stderr
);
3664 /* Consume the "--". */
3667 else if (strcmp (*next_arg
, "--debug") == 0)
3669 else if (startswith (*next_arg
, "--debug-format="))
3672 = parse_debug_format_options ((*next_arg
)
3673 + sizeof ("--debug-format=") - 1, 0);
3675 if (error_msg
!= NULL
)
3677 fprintf (stderr
, "%s", error_msg
);
3681 else if (strcmp (*next_arg
, "--remote-debug") == 0)
3683 else if (strcmp (*next_arg
, "--disable-packet") == 0)
3685 gdbserver_show_disableable (stdout
);
3688 else if (startswith (*next_arg
, "--disable-packet="))
3690 char *packets
, *tok
;
3692 packets
= *next_arg
+= sizeof ("--disable-packet=") - 1;
3693 for (tok
= strtok (packets
, ",");
3695 tok
= strtok (NULL
, ","))
3697 if (strcmp ("vCont", tok
) == 0)
3698 disable_packet_vCont
= 1;
3699 else if (strcmp ("Tthread", tok
) == 0)
3700 disable_packet_Tthread
= 1;
3701 else if (strcmp ("qC", tok
) == 0)
3702 disable_packet_qC
= 1;
3703 else if (strcmp ("qfThreadInfo", tok
) == 0)
3704 disable_packet_qfThreadInfo
= 1;
3705 else if (strcmp ("threads", tok
) == 0)
3707 disable_packet_vCont
= 1;
3708 disable_packet_Tthread
= 1;
3709 disable_packet_qC
= 1;
3710 disable_packet_qfThreadInfo
= 1;
3714 fprintf (stderr
, "Don't know how to disable \"%s\".\n\n",
3716 gdbserver_show_disableable (stderr
);
3721 else if (strcmp (*next_arg
, "-") == 0)
3723 /* "-" specifies a stdio connection and is a form of port
3725 port
= STDIO_CONNECTION_NAME
;
3729 else if (strcmp (*next_arg
, "--disable-randomization") == 0)
3730 disable_randomization
= 1;
3731 else if (strcmp (*next_arg
, "--no-disable-randomization") == 0)
3732 disable_randomization
= 0;
3733 else if (strcmp (*next_arg
, "--startup-with-shell") == 0)
3734 startup_with_shell
= true;
3735 else if (strcmp (*next_arg
, "--no-startup-with-shell") == 0)
3736 startup_with_shell
= false;
3737 else if (strcmp (*next_arg
, "--once") == 0)
3739 else if (strcmp (*next_arg
, "--selftest") == 0)
3741 else if (startswith (*next_arg
, "--selftest="))
3744 selftest_filter
= *next_arg
+ strlen ("--selftest=");
3748 fprintf (stderr
, "Unknown argument: %s\n", *next_arg
);
3761 if ((port
== NULL
|| (!attach
&& !multi_mode
&& *next_arg
== NULL
))
3764 gdbserver_usage (stderr
);
3768 /* Remember stdio descriptors. LISTEN_DESC must not be listed, it will be
3769 opened by remote_prepare. */
3772 save_original_signals_state ();
3774 /* We need to know whether the remote connection is stdio before
3775 starting the inferior. Inferiors created in this scenario have
3776 stdin,stdout redirected. So do this here before we call
3779 remote_prepare (port
);
3784 /* --attach used to come after PORT, so allow it there for
3786 if (*next_arg
!= NULL
&& strcmp (*next_arg
, "--attach") == 0)
3793 && (*next_arg
== NULL
3794 || (*next_arg
)[0] == '\0'
3795 || (pid
= strtoul (*next_arg
, &arg_end
, 0)) == 0
3797 || next_arg
[1] != NULL
))
3802 gdbserver_usage (stderr
);
3806 /* Gather information about the environment. */
3807 our_environ
= gdb_environ::from_host_environ ();
3809 initialize_async_io ();
3811 have_job_control ();
3812 initialize_event_loop ();
3813 if (target_supports_tracepoints ())
3814 initialize_tracepoint ();
3815 initialize_notif ();
3817 own_buf
= (char *) xmalloc (PBUFSIZ
+ 1);
3818 mem_buf
= (unsigned char *) xmalloc (PBUFSIZ
);
3822 selftests::run_tests (selftest_filter
);
3823 throw_quit ("Quit");
3826 if (pid
== 0 && *next_arg
!= NULL
)
3830 n
= argc
- (next_arg
- argv
);
3831 program_name
= xstrdup (next_arg
[0]);
3832 for (i
= 1; i
< n
; i
++)
3833 program_args
.push_back (xstrdup (next_arg
[i
]));
3834 program_args
.push_back (NULL
);
3836 /* Wait till we are at first instruction in program. */
3837 create_inferior (program_name
, program_args
);
3839 /* We are now (hopefully) stopped at the first instruction of
3840 the target process. This assumes that the target process was
3841 successfully created. */
3845 if (attach_inferior (pid
) == -1)
3846 error ("Attaching not supported on this target");
3848 /* Otherwise succeeded. */
3852 last_status
.kind
= TARGET_WAITKIND_EXITED
;
3853 last_status
.value
.integer
= 0;
3854 last_ptid
= minus_one_ptid
;
3856 make_cleanup (detach_or_kill_for_exit_cleanup
, NULL
);
3858 /* Don't report shared library events on the initial connection,
3859 even if some libraries are preloaded. Avoids the "stopped by
3860 shared library event" notice on gdb side. */
3863 if (last_status
.kind
== TARGET_WAITKIND_EXITED
3864 || last_status
.kind
== TARGET_WAITKIND_SIGNALLED
)
3869 if (!was_running
&& !multi_mode
)
3870 error ("No program to debug");
3877 report_fork_events
= 0;
3878 report_vfork_events
= 0;
3879 report_exec_events
= 0;
3880 /* Be sure we're out of tfind mode. */
3881 current_traceframe
= -1;
3882 cont_thread
= null_ptid
;
3883 swbreak_feature
= 0;
3884 hwbreak_feature
= 0;
3885 vCont_supported
= 0;
3891 /* Wait for events. This will return when all event sources
3892 are removed from the event loop. */
3893 start_event_loop ();
3895 /* If an exit was requested (using the "monitor exit"
3896 command), terminate now. */
3898 throw_quit ("Quit");
3900 /* The only other way to get here is for getpkt to fail:
3902 - If --once was specified, we're done.
3904 - If not in extended-remote mode, and we're no longer
3905 debugging anything, simply exit: GDB has disconnected
3906 after processing the last process exit.
3908 - Otherwise, close the connection and reopen it at the
3910 if (run_once
|| (!extended_protocol
&& !target_running ()))
3911 throw_quit ("Quit");
3914 "Remote side has terminated connection. "
3915 "GDBserver will reopen the connection.\n");
3917 /* Get rid of any pending statuses. An eventual reconnection
3918 (by the same GDB instance or another) will refresh all its
3919 state from scratch. */
3920 discard_queued_stop_replies (minus_one_ptid
);
3921 for_each_inferior (&all_threads
,
3922 clear_pending_status_callback
);
3926 if (disconnected_tracing
)
3928 /* Try to enable non-stop/async mode, so we we can
3929 both wait for an async socket accept, and handle
3930 async target events simultaneously. There's also
3931 no point either in having the target always stop
3932 all threads, when we're going to pass signals
3933 down without informing GDB. */
3936 if (start_non_stop (1))
3939 /* Detaching implicitly resumes all threads;
3940 simply disconnecting does not. */
3946 "Disconnected tracing disabled; "
3947 "stopping trace run.\n");
3952 CATCH (exception
, RETURN_MASK_ERROR
)
3955 fprintf (stderr
, "gdbserver: %s\n", exception
.message
);
3957 if (response_needed
)
3959 write_enn (own_buf
);
3964 throw_quit ("Quit");
3970 /* Main function. */
3973 main (int argc
, char *argv
[])
3978 captured_main (argc
, argv
);
3980 CATCH (exception
, RETURN_MASK_ALL
)
3982 if (exception
.reason
== RETURN_ERROR
)
3985 fprintf (stderr
, "%s\n", exception
.message
);
3986 fprintf (stderr
, "Exiting\n");
3994 gdb_assert_not_reached ("captured_main should never return");
3997 /* Process options coming from Z packets for a breakpoint. PACKET is
3998 the packet buffer. *PACKET is updated to point to the first char
3999 after the last processed option. */
4002 process_point_options (struct gdb_breakpoint
*bp
, char **packet
)
4004 char *dataptr
= *packet
;
4007 /* Check if data has the correct format. */
4008 if (*dataptr
!= ';')
4015 if (*dataptr
== ';')
4018 if (*dataptr
== 'X')
4020 /* Conditional expression. */
4022 debug_printf ("Found breakpoint condition.\n");
4023 if (!add_breakpoint_condition (bp
, &dataptr
))
4024 dataptr
= strchrnul (dataptr
, ';');
4026 else if (startswith (dataptr
, "cmds:"))
4028 dataptr
+= strlen ("cmds:");
4030 debug_printf ("Found breakpoint commands %s.\n", dataptr
);
4031 persist
= (*dataptr
== '1');
4033 if (add_breakpoint_commands (bp
, &dataptr
, persist
))
4034 dataptr
= strchrnul (dataptr
, ';');
4038 fprintf (stderr
, "Unknown token %c, ignoring.\n",
4040 /* Skip tokens until we find one that we recognize. */
4041 dataptr
= strchrnul (dataptr
, ';');
4047 /* Event loop callback that handles a serial event. The first byte in
4048 the serial buffer gets us here. We expect characters to arrive at
4049 a brisk pace, so we read the rest of the packet with a blocking
4053 process_serial_event (void)
4061 int new_packet_len
= -1;
4063 disable_async_io ();
4065 response_needed
= 0;
4066 packet_len
= getpkt (own_buf
);
4067 if (packet_len
<= 0)
4070 /* Force an event loop break. */
4073 response_needed
= 1;
4075 char ch
= own_buf
[0];
4079 handle_query (own_buf
, packet_len
, &new_packet_len
);
4082 handle_general_set (own_buf
);
4085 handle_detach (own_buf
);
4088 extended_protocol
= 1;
4092 handle_status (own_buf
);
4095 if (own_buf
[1] == 'c' || own_buf
[1] == 'g' || own_buf
[1] == 's')
4097 require_running_or_break (own_buf
);
4099 ptid_t thread_id
= read_ptid (&own_buf
[2], NULL
);
4101 if (thread_id
== null_ptid
|| thread_id
== minus_one_ptid
)
4102 thread_id
= null_ptid
;
4103 else if (thread_id
.is_pid ())
4105 /* The ptid represents a pid. */
4106 thread_info
*thread
= find_any_thread_of_pid (thread_id
.pid ());
4110 write_enn (own_buf
);
4114 thread_id
= thread
->entry
.id
;
4118 /* The ptid represents a lwp/tid. */
4119 if (find_thread_ptid (thread_id
) == NULL
)
4121 write_enn (own_buf
);
4126 if (own_buf
[1] == 'g')
4128 if (ptid_equal (thread_id
, null_ptid
))
4130 /* GDB is telling us to choose any thread. Check if
4131 the currently selected thread is still valid. If
4132 it is not, select the first available. */
4133 struct thread_info
*thread
=
4134 (struct thread_info
*) find_inferior_id (&all_threads
,
4137 thread
= get_first_thread ();
4138 thread_id
= thread
->entry
.id
;
4141 general_thread
= thread_id
;
4142 set_desired_thread ();
4143 gdb_assert (current_thread
!= NULL
);
4145 else if (own_buf
[1] == 'c')
4146 cont_thread
= thread_id
;
4152 /* Silently ignore it so that gdb can extend the protocol
4153 without compatibility headaches. */
4158 require_running_or_break (own_buf
);
4159 if (current_traceframe
>= 0)
4161 struct regcache
*regcache
4162 = new_register_cache (current_target_desc ());
4164 if (fetch_traceframe_registers (current_traceframe
,
4166 registers_to_string (regcache
, own_buf
);
4168 write_enn (own_buf
);
4169 free_register_cache (regcache
);
4173 struct regcache
*regcache
;
4175 if (!set_desired_thread ())
4176 write_enn (own_buf
);
4179 regcache
= get_thread_regcache (current_thread
, 1);
4180 registers_to_string (regcache
, own_buf
);
4185 require_running_or_break (own_buf
);
4186 if (current_traceframe
>= 0)
4187 write_enn (own_buf
);
4190 struct regcache
*regcache
;
4192 if (!set_desired_thread ())
4193 write_enn (own_buf
);
4196 regcache
= get_thread_regcache (current_thread
, 1);
4197 registers_from_string (regcache
, &own_buf
[1]);
4203 require_running_or_break (own_buf
);
4204 decode_m_packet (&own_buf
[1], &mem_addr
, &len
);
4205 res
= gdb_read_memory (mem_addr
, mem_buf
, len
);
4207 write_enn (own_buf
);
4209 bin2hex (mem_buf
, own_buf
, res
);
4212 require_running_or_break (own_buf
);
4213 decode_M_packet (&own_buf
[1], &mem_addr
, &len
, &mem_buf
);
4214 if (gdb_write_memory (mem_addr
, mem_buf
, len
) == 0)
4217 write_enn (own_buf
);
4220 require_running_or_break (own_buf
);
4221 if (decode_X_packet (&own_buf
[1], packet_len
- 1,
4222 &mem_addr
, &len
, &mem_buf
) < 0
4223 || gdb_write_memory (mem_addr
, mem_buf
, len
) != 0)
4224 write_enn (own_buf
);
4229 require_running_or_break (own_buf
);
4230 hex2bin (own_buf
+ 1, &sig
, 1);
4231 if (gdb_signal_to_host_p ((enum gdb_signal
) sig
))
4232 signal
= gdb_signal_to_host ((enum gdb_signal
) sig
);
4235 myresume (own_buf
, 0, signal
);
4238 require_running_or_break (own_buf
);
4239 hex2bin (own_buf
+ 1, &sig
, 1);
4240 if (gdb_signal_to_host_p ((enum gdb_signal
) sig
))
4241 signal
= gdb_signal_to_host ((enum gdb_signal
) sig
);
4244 myresume (own_buf
, 1, signal
);
4247 require_running_or_break (own_buf
);
4249 myresume (own_buf
, 0, signal
);
4252 require_running_or_break (own_buf
);
4254 myresume (own_buf
, 1, signal
);
4256 case 'Z': /* insert_ ... */
4258 case 'z': /* remove_ ... */
4263 char type
= own_buf
[1];
4265 const int insert
= ch
== 'Z';
4266 char *p
= &own_buf
[3];
4268 p
= unpack_varlen_hex (p
, &addr
);
4269 kind
= strtol (p
+ 1, &dataptr
, 16);
4273 struct gdb_breakpoint
*bp
;
4275 bp
= set_gdb_breakpoint (type
, addr
, kind
, &res
);
4280 /* GDB may have sent us a list of *point parameters to
4281 be evaluated on the target's side. Read such list
4282 here. If we already have a list of parameters, GDB
4283 is telling us to drop that list and use this one
4285 clear_breakpoint_conditions_and_commands (bp
);
4286 process_point_options (bp
, &dataptr
);
4290 res
= delete_gdb_breakpoint (type
, addr
, kind
);
4298 write_enn (own_buf
);
4302 response_needed
= 0;
4303 if (!target_running ())
4304 /* The packet we received doesn't make sense - but we can't
4305 reply to it, either. */
4308 fprintf (stderr
, "Killing all inferiors\n");
4309 for_each_inferior (&all_processes
, kill_inferior_callback
);
4311 /* When using the extended protocol, we wait with no program
4312 running. The traditional protocol will exit instead. */
4313 if (extended_protocol
)
4315 last_status
.kind
= TARGET_WAITKIND_EXITED
;
4316 last_status
.value
.sig
= GDB_SIGNAL_KILL
;
4324 require_running_or_break (own_buf
);
4326 ptid_t thread_id
= read_ptid (&own_buf
[1], NULL
);
4327 if (find_thread_ptid (thread_id
) == NULL
)
4329 write_enn (own_buf
);
4333 if (mythread_alive (thread_id
))
4336 write_enn (own_buf
);
4340 response_needed
= 0;
4342 /* Restarting the inferior is only supported in the extended
4344 if (extended_protocol
)
4346 if (target_running ())
4347 for_each_inferior (&all_processes
,
4348 kill_inferior_callback
);
4349 fprintf (stderr
, "GDBserver restarting\n");
4351 /* Wait till we are at 1st instruction in prog. */
4352 if (program_name
!= NULL
)
4354 create_inferior (program_name
, program_args
);
4356 if (last_status
.kind
== TARGET_WAITKIND_STOPPED
)
4358 /* Stopped at the first instruction of the target
4360 general_thread
= last_ptid
;
4364 /* Something went wrong. */
4365 general_thread
= null_ptid
;
4370 last_status
.kind
= TARGET_WAITKIND_EXITED
;
4371 last_status
.value
.sig
= GDB_SIGNAL_KILL
;
4377 /* It is a request we don't understand. Respond with an
4378 empty packet so that gdb knows that we don't support this
4384 /* Extended (long) request. */
4385 handle_v_requests (own_buf
, packet_len
, &new_packet_len
);
4389 /* It is a request we don't understand. Respond with an empty
4390 packet so that gdb knows that we don't support this
4396 if (new_packet_len
!= -1)
4397 putpkt_binary (own_buf
, new_packet_len
);
4401 response_needed
= 0;
4409 /* Event-loop callback for serial events. */
4412 handle_serial_event (int err
, gdb_client_data client_data
)
4415 debug_printf ("handling possible serial event\n");
4417 /* Really handle it. */
4418 if (process_serial_event () < 0)
4421 /* Be sure to not change the selected thread behind GDB's back.
4422 Important in the non-stop mode asynchronous protocol. */
4423 set_desired_thread ();
4428 /* Push a stop notification on the notification queue. */
4431 push_stop_notification (ptid_t ptid
, struct target_waitstatus
*status
)
4433 struct vstop_notif
*vstop_notif
= XNEW (struct vstop_notif
);
4435 vstop_notif
->status
= *status
;
4436 vstop_notif
->ptid
= ptid
;
4437 /* Push Stop notification. */
4438 notif_push (¬if_stop
, (struct notif_event
*) vstop_notif
);
4441 /* Event-loop callback for target events. */
4444 handle_target_event (int err
, gdb_client_data client_data
)
4447 debug_printf ("handling possible target event\n");
4449 last_ptid
= mywait (minus_one_ptid
, &last_status
,
4452 if (last_status
.kind
== TARGET_WAITKIND_NO_RESUMED
)
4454 if (gdb_connected () && report_no_resumed
)
4455 push_stop_notification (null_ptid
, &last_status
);
4457 else if (last_status
.kind
!= TARGET_WAITKIND_IGNORE
)
4459 int pid
= ptid_get_pid (last_ptid
);
4460 struct process_info
*process
= find_process_pid (pid
);
4461 int forward_event
= !gdb_connected () || process
->gdb_detached
;
4463 if (last_status
.kind
== TARGET_WAITKIND_EXITED
4464 || last_status
.kind
== TARGET_WAITKIND_SIGNALLED
)
4466 mark_breakpoints_out (process
);
4467 target_mourn_inferior (last_ptid
);
4469 else if (last_status
.kind
== TARGET_WAITKIND_THREAD_EXITED
)
4473 /* We're reporting this thread as stopped. Update its
4474 "want-stopped" state to what the client wants, until it
4475 gets a new resume action. */
4476 current_thread
->last_resume_kind
= resume_stop
;
4477 current_thread
->last_status
= last_status
;
4482 if (!target_running ())
4484 /* The last process exited. We're done. */
4488 if (last_status
.kind
== TARGET_WAITKIND_EXITED
4489 || last_status
.kind
== TARGET_WAITKIND_SIGNALLED
4490 || last_status
.kind
== TARGET_WAITKIND_THREAD_EXITED
)
4494 /* A thread stopped with a signal, but gdb isn't
4495 connected to handle it. Pass it down to the
4496 inferior, as if it wasn't being traced. */
4497 enum gdb_signal signal
;
4500 debug_printf ("GDB not connected; forwarding event %d for"
4502 (int) last_status
.kind
,
4503 target_pid_to_str (last_ptid
));
4505 if (last_status
.kind
== TARGET_WAITKIND_STOPPED
)
4506 signal
= last_status
.value
.sig
;
4508 signal
= GDB_SIGNAL_0
;
4509 target_continue (last_ptid
, signal
);
4513 push_stop_notification (last_ptid
, &last_status
);
4516 /* Be sure to not change the selected thread behind GDB's back.
4517 Important in the non-stop mode asynchronous protocol. */
4518 set_desired_thread ();
4531 } // namespace selftests
4532 #endif /* GDB_SELF_TEST */