1 /* Main code for remote server for GDB.
2 Copyright (C) 1989-2019 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"
21 #include "common/agent.h"
24 #include "common/rsp-low.h"
25 #include "common/signals-state-save-restore.h"
31 #include "common/gdb_vecs.h"
32 #include "common/gdb_wait.h"
33 #include "common/btrace-common.h"
34 #include "common/filestuff.h"
35 #include "tracepoint.h"
39 #include "common/common-inferior.h"
40 #include "common/job-control.h"
41 #include "common/environ.h"
42 #include "filenames.h"
43 #include "common/pathstuff.h"
45 #include "common/selftest.h"
47 #define require_running_or_return(BUF) \
48 if (!target_running ()) \
54 #define require_running_or_break(BUF) \
55 if (!target_running ()) \
61 /* String containing the current directory (what getwd would return). */
63 char *current_directory
;
65 /* The environment to pass to the inferior when creating it. */
67 static gdb_environ our_environ
;
69 /* Start the inferior using a shell. */
71 /* We always try to start the inferior using a shell. */
73 int startup_with_shell
= 1;
77 static int extended_protocol
;
78 static int response_needed
;
79 static int exit_requested
;
81 /* --once: Exit after the first connection has closed. */
84 /* Whether to report TARGET_WAITKING_NO_RESUMED events. */
85 static int report_no_resumed
;
90 /* Set the PROGRAM_PATH. Here we adjust the path of the provided
92 void set (gdb::unique_xmalloc_ptr
<char> &&path
)
94 m_path
= std::move (path
);
96 /* Make sure we're using the absolute path of the inferior when
98 if (!contains_dir_separator (m_path
.get ()))
102 /* Check if the file is in our CWD. If it is, then we prefix
103 its name with CURRENT_DIRECTORY. Otherwise, we leave the
104 name as-is because we'll try searching for it in $PATH. */
105 if (is_regular_file (m_path
.get (), ®_file_errno
))
106 m_path
= gdb_abspath (m_path
.get ());
110 /* Return the PROGRAM_PATH. */
112 { return m_path
.get (); }
115 /* The program name, adjusted if needed. */
116 gdb::unique_xmalloc_ptr
<char> m_path
;
118 static std::vector
<char *> program_args
;
119 static std::string wrapper_argv
;
121 /* The PID of the originally created or attached inferior. Used to
122 send signals to the process when GDB sends us an asynchronous interrupt
123 (user hitting Control-C in the client), and to wait for the child to exit
124 when no longer debugging it. */
126 unsigned long signal_pid
;
128 /* Set if you want to disable optional thread related packets support
129 in gdbserver, for the sake of testing GDB against stubs that don't
131 int disable_packet_vCont
;
132 int disable_packet_Tthread
;
133 int disable_packet_qC
;
134 int disable_packet_qfThreadInfo
;
136 static unsigned char *mem_buf
;
138 /* A sub-class of 'struct notif_event' for stop, holding information
139 relative to a single stop reply. We keep a queue of these to
140 push to GDB in non-stop mode. */
144 struct notif_event base
;
146 /* Thread or process that got the event. */
150 struct target_waitstatus status
;
153 /* The current btrace configuration. This is gdbserver's mirror of GDB's
154 btrace configuration. */
155 static struct btrace_config current_btrace_conf
;
157 DEFINE_QUEUE_P (notif_event_p
);
159 /* The client remote protocol state. */
161 static client_state g_client_state
;
166 client_state
&cs
= g_client_state
;
171 /* Put a stop reply to the stop reply queue. */
174 queue_stop_reply (ptid_t ptid
, struct target_waitstatus
*status
)
176 struct vstop_notif
*new_notif
= XNEW (struct vstop_notif
);
178 new_notif
->ptid
= ptid
;
179 new_notif
->status
= *status
;
181 notif_event_enque (¬if_stop
, (struct notif_event
*) new_notif
);
185 remove_all_on_match_ptid (QUEUE (notif_event_p
) *q
,
186 QUEUE_ITER (notif_event_p
) *iter
,
187 struct notif_event
*event
,
190 ptid_t filter_ptid
= *(ptid_t
*) data
;
191 struct vstop_notif
*vstop_event
= (struct vstop_notif
*) event
;
193 if (vstop_event
->ptid
.matches (filter_ptid
))
195 if (q
->free_func
!= NULL
)
196 q
->free_func (event
);
198 QUEUE_remove_elem (notif_event_p
, q
, iter
);
207 discard_queued_stop_replies (ptid_t ptid
)
209 QUEUE_iterate (notif_event_p
, notif_stop
.queue
,
210 remove_all_on_match_ptid
, &ptid
);
214 vstop_notif_reply (struct notif_event
*event
, char *own_buf
)
216 struct vstop_notif
*vstop
= (struct vstop_notif
*) event
;
218 prepare_resume_reply (own_buf
, vstop
->ptid
, &vstop
->status
);
221 /* QUEUE_iterate callback helper for in_queued_stop_replies. */
224 in_queued_stop_replies_ptid (QUEUE (notif_event_p
) *q
,
225 QUEUE_ITER (notif_event_p
) *iter
,
226 struct notif_event
*event
,
229 ptid_t filter_ptid
= *(ptid_t
*) data
;
230 struct vstop_notif
*vstop_event
= (struct vstop_notif
*) event
;
232 if (vstop_event
->ptid
.matches (filter_ptid
))
235 /* Don't resume fork children that GDB does not know about yet. */
236 if ((vstop_event
->status
.kind
== TARGET_WAITKIND_FORKED
237 || vstop_event
->status
.kind
== TARGET_WAITKIND_VFORKED
)
238 && vstop_event
->status
.value
.related_pid
.matches (filter_ptid
))
247 in_queued_stop_replies (ptid_t ptid
)
249 return !QUEUE_iterate (notif_event_p
, notif_stop
.queue
,
250 in_queued_stop_replies_ptid
, &ptid
);
253 struct notif_server notif_stop
=
255 "vStopped", "Stop", NULL
, vstop_notif_reply
,
259 target_running (void)
261 return get_first_thread () != NULL
;
264 /* See common/common-inferior.h. */
269 return !wrapper_argv
.empty () ? wrapper_argv
.c_str () : NULL
;
272 /* See common/common-inferior.h. */
275 get_exec_file (int err
)
277 if (err
&& program_path
.get () == NULL
)
278 error (_("No executable file specified."));
280 return program_path
.get ();
292 attach_inferior (int pid
)
294 client_state
&cs
= get_client_state ();
295 /* myattach should return -1 if attaching is unsupported,
296 0 if it succeeded, and call error() otherwise. */
298 if (find_process_pid (pid
) != nullptr)
299 error ("Already attached to process %d\n", pid
);
301 if (myattach (pid
) != 0)
304 fprintf (stderr
, "Attached; pid = %d\n", pid
);
307 /* FIXME - It may be that we should get the SIGNAL_PID from the
308 attach function, so that it can be the main thread instead of
309 whichever we were told to attach to. */
314 cs
.last_ptid
= mywait (ptid_t (pid
), &cs
.last_status
, 0, 0);
316 /* GDB knows to ignore the first SIGSTOP after attaching to a running
317 process using the "attach" command, but this is different; it's
318 just using "target remote". Pretend it's just starting up. */
319 if (cs
.last_status
.kind
== TARGET_WAITKIND_STOPPED
320 && cs
.last_status
.value
.sig
== GDB_SIGNAL_STOP
)
321 cs
.last_status
.value
.sig
= GDB_SIGNAL_TRAP
;
323 current_thread
->last_resume_kind
= resume_stop
;
324 current_thread
->last_status
= cs
.last_status
;
330 extern int remote_debug
;
332 /* Decode a qXfer read request. Return 0 if everything looks OK,
336 decode_xfer_read (char *buf
, CORE_ADDR
*ofs
, unsigned int *len
)
338 /* After the read marker and annex, qXfer looks like a
339 traditional 'm' packet. */
340 decode_m_packet (buf
, ofs
, len
);
346 decode_xfer (char *buf
, char **object
, char **rw
, char **annex
, char **offset
)
348 /* Extract and NUL-terminate the object. */
350 while (*buf
&& *buf
!= ':')
356 /* Extract and NUL-terminate the read/write action. */
358 while (*buf
&& *buf
!= ':')
364 /* Extract and NUL-terminate the annex. */
366 while (*buf
&& *buf
!= ':')
376 /* Write the response to a successful qXfer read. Returns the
377 length of the (binary) data stored in BUF, corresponding
378 to as much of DATA/LEN as we could fit. IS_MORE controls
379 the first character of the response. */
381 write_qxfer_response (char *buf
, const gdb_byte
*data
, int len
, int is_more
)
390 return remote_escape_output (data
, len
, 1, (unsigned char *) buf
+ 1,
391 &out_len
, PBUFSIZ
- 2) + 1;
394 /* Handle btrace enabling in BTS format. */
397 handle_btrace_enable_bts (struct thread_info
*thread
)
399 if (thread
->btrace
!= NULL
)
400 error (_("Btrace already enabled."));
402 current_btrace_conf
.format
= BTRACE_FORMAT_BTS
;
403 thread
->btrace
= target_enable_btrace (thread
->id
, ¤t_btrace_conf
);
406 /* Handle btrace enabling in Intel Processor Trace format. */
409 handle_btrace_enable_pt (struct thread_info
*thread
)
411 if (thread
->btrace
!= NULL
)
412 error (_("Btrace already enabled."));
414 current_btrace_conf
.format
= BTRACE_FORMAT_PT
;
415 thread
->btrace
= target_enable_btrace (thread
->id
, ¤t_btrace_conf
);
418 /* Handle btrace disabling. */
421 handle_btrace_disable (struct thread_info
*thread
)
424 if (thread
->btrace
== NULL
)
425 error (_("Branch tracing not enabled."));
427 if (target_disable_btrace (thread
->btrace
) != 0)
428 error (_("Could not disable branch tracing."));
430 thread
->btrace
= NULL
;
433 /* Handle the "Qbtrace" packet. */
436 handle_btrace_general_set (char *own_buf
)
438 client_state
&cs
= get_client_state ();
439 struct thread_info
*thread
;
442 if (!startswith (own_buf
, "Qbtrace:"))
445 op
= own_buf
+ strlen ("Qbtrace:");
447 if (cs
.general_thread
== null_ptid
448 || cs
.general_thread
== minus_one_ptid
)
450 strcpy (own_buf
, "E.Must select a single thread.");
454 thread
= find_thread_ptid (cs
.general_thread
);
457 strcpy (own_buf
, "E.No such thread.");
463 if (strcmp (op
, "bts") == 0)
464 handle_btrace_enable_bts (thread
);
465 else if (strcmp (op
, "pt") == 0)
466 handle_btrace_enable_pt (thread
);
467 else if (strcmp (op
, "off") == 0)
468 handle_btrace_disable (thread
);
470 error (_("Bad Qbtrace operation. Use bts, pt, or off."));
474 CATCH (exception
, RETURN_MASK_ERROR
)
476 sprintf (own_buf
, "E.%s", exception
.message
);
483 /* Handle the "Qbtrace-conf" packet. */
486 handle_btrace_conf_general_set (char *own_buf
)
488 client_state
&cs
= get_client_state ();
489 struct thread_info
*thread
;
492 if (!startswith (own_buf
, "Qbtrace-conf:"))
495 op
= own_buf
+ strlen ("Qbtrace-conf:");
497 if (cs
.general_thread
== null_ptid
498 || cs
.general_thread
== minus_one_ptid
)
500 strcpy (own_buf
, "E.Must select a single thread.");
504 thread
= find_thread_ptid (cs
.general_thread
);
507 strcpy (own_buf
, "E.No such thread.");
511 if (startswith (op
, "bts:size="))
517 size
= strtoul (op
+ strlen ("bts:size="), &endp
, 16);
518 if (endp
== NULL
|| *endp
!= 0 || errno
!= 0 || size
> UINT_MAX
)
520 strcpy (own_buf
, "E.Bad size value.");
524 current_btrace_conf
.bts
.size
= (unsigned int) size
;
526 else if (strncmp (op
, "pt:size=", strlen ("pt:size=")) == 0)
532 size
= strtoul (op
+ strlen ("pt:size="), &endp
, 16);
533 if (endp
== NULL
|| *endp
!= 0 || errno
!= 0 || size
> UINT_MAX
)
535 strcpy (own_buf
, "E.Bad size value.");
539 current_btrace_conf
.pt
.size
= (unsigned int) size
;
543 strcpy (own_buf
, "E.Bad Qbtrace configuration option.");
551 /* Handle all of the extended 'Q' packets. */
554 handle_general_set (char *own_buf
)
556 client_state
&cs
= get_client_state ();
557 if (startswith (own_buf
, "QPassSignals:"))
559 int numsigs
= (int) GDB_SIGNAL_LAST
, i
;
560 const char *p
= own_buf
+ strlen ("QPassSignals:");
563 p
= decode_address_to_semicolon (&cursig
, p
);
564 for (i
= 0; i
< numsigs
; i
++)
568 cs
.pass_signals
[i
] = 1;
570 /* Keep looping, to clear the remaining signals. */
573 p
= decode_address_to_semicolon (&cursig
, p
);
576 cs
.pass_signals
[i
] = 0;
578 strcpy (own_buf
, "OK");
582 if (startswith (own_buf
, "QProgramSignals:"))
584 int numsigs
= (int) GDB_SIGNAL_LAST
, i
;
585 const char *p
= own_buf
+ strlen ("QProgramSignals:");
588 cs
.program_signals_p
= 1;
590 p
= decode_address_to_semicolon (&cursig
, p
);
591 for (i
= 0; i
< numsigs
; i
++)
595 cs
.program_signals
[i
] = 1;
597 /* Keep looping, to clear the remaining signals. */
600 p
= decode_address_to_semicolon (&cursig
, p
);
603 cs
.program_signals
[i
] = 0;
605 strcpy (own_buf
, "OK");
609 if (startswith (own_buf
, "QCatchSyscalls:"))
611 const char *p
= own_buf
+ sizeof ("QCatchSyscalls:") - 1;
614 struct process_info
*process
;
616 if (!target_running () || !target_supports_catch_syscall ())
622 if (strcmp (p
, "0") == 0)
624 else if (p
[0] == '1' && (p
[1] == ';' || p
[1] == '\0'))
628 fprintf (stderr
, "Unknown catch-syscalls mode requested: %s\n",
634 process
= current_process ();
635 process
->syscalls_to_catch
.clear ();
645 p
= decode_address_to_semicolon (&sysno
, p
);
646 process
->syscalls_to_catch
.push_back (sysno
);
650 process
->syscalls_to_catch
.push_back (ANY_SYSCALL
);
657 if (strcmp (own_buf
, "QEnvironmentReset") == 0)
659 our_environ
= gdb_environ::from_host_environ ();
665 if (startswith (own_buf
, "QEnvironmentHexEncoded:"))
667 const char *p
= own_buf
+ sizeof ("QEnvironmentHexEncoded:") - 1;
668 /* The final form of the environment variable. FINAL_VAR will
669 hold the 'VAR=VALUE' format. */
670 std::string final_var
= hex2str (p
);
671 std::string var_name
, var_value
;
675 debug_printf (_("[QEnvironmentHexEncoded received '%s']\n"), p
);
676 debug_printf (_("[Environment variable to be set: '%s']\n"),
681 size_t pos
= final_var
.find ('=');
682 if (pos
== std::string::npos
)
684 warning (_("Unexpected format for environment variable: '%s'"),
690 var_name
= final_var
.substr (0, pos
);
691 var_value
= final_var
.substr (pos
+ 1, std::string::npos
);
693 our_environ
.set (var_name
.c_str (), var_value
.c_str ());
699 if (startswith (own_buf
, "QEnvironmentUnset:"))
701 const char *p
= own_buf
+ sizeof ("QEnvironmentUnset:") - 1;
702 std::string varname
= hex2str (p
);
706 debug_printf (_("[QEnvironmentUnset received '%s']\n"), p
);
707 debug_printf (_("[Environment variable to be unset: '%s']\n"),
712 our_environ
.unset (varname
.c_str ());
718 if (strcmp (own_buf
, "QStartNoAckMode") == 0)
722 debug_printf ("[noack mode enabled]\n");
731 if (startswith (own_buf
, "QNonStop:"))
733 char *mode
= own_buf
+ 9;
737 if (strcmp (mode
, "0") == 0)
739 else if (strcmp (mode
, "1") == 0)
743 /* We don't know what this mode is, so complain to
745 fprintf (stderr
, "Unknown non-stop mode requested: %s\n",
751 req_str
= req
? "non-stop" : "all-stop";
752 if (start_non_stop (req
) != 0)
754 fprintf (stderr
, "Setting %s mode failed\n", req_str
);
762 debug_printf ("[%s mode enabled]\n", req_str
);
768 if (startswith (own_buf
, "QDisableRandomization:"))
770 char *packet
= own_buf
+ strlen ("QDisableRandomization:");
773 unpack_varlen_hex (packet
, &setting
);
774 cs
.disable_randomization
= setting
;
778 debug_printf (cs
.disable_randomization
779 ? "[address space randomization disabled]\n"
780 : "[address space randomization enabled]\n");
787 if (target_supports_tracepoints ()
788 && handle_tracepoint_general_set (own_buf
))
791 if (startswith (own_buf
, "QAgent:"))
793 char *mode
= own_buf
+ strlen ("QAgent:");
796 if (strcmp (mode
, "0") == 0)
798 else if (strcmp (mode
, "1") == 0)
802 /* We don't know what this value is, so complain to GDB. */
803 sprintf (own_buf
, "E.Unknown QAgent value");
807 /* Update the flag. */
810 debug_printf ("[%s agent]\n", req
? "Enable" : "Disable");
815 if (handle_btrace_general_set (own_buf
))
818 if (handle_btrace_conf_general_set (own_buf
))
821 if (startswith (own_buf
, "QThreadEvents:"))
823 char *mode
= own_buf
+ strlen ("QThreadEvents:");
824 enum tribool req
= TRIBOOL_UNKNOWN
;
826 if (strcmp (mode
, "0") == 0)
828 else if (strcmp (mode
, "1") == 0)
832 /* We don't know what this mode is, so complain to GDB. */
833 sprintf (own_buf
, "E.Unknown thread-events mode requested: %s\n",
838 cs
.report_thread_events
= (req
== TRIBOOL_TRUE
);
842 const char *req_str
= cs
.report_thread_events
? "enabled" : "disabled";
844 debug_printf ("[thread events are now %s]\n", req_str
);
851 if (startswith (own_buf
, "QStartupWithShell:"))
853 const char *value
= own_buf
+ strlen ("QStartupWithShell:");
855 if (strcmp (value
, "1") == 0)
856 startup_with_shell
= true;
857 else if (strcmp (value
, "0") == 0)
858 startup_with_shell
= false;
862 fprintf (stderr
, "Unknown value to startup-with-shell: %s\n",
869 debug_printf (_("[Inferior will %s started with shell]"),
870 startup_with_shell
? "be" : "not be");
876 if (startswith (own_buf
, "QSetWorkingDir:"))
878 const char *p
= own_buf
+ strlen ("QSetWorkingDir:");
882 std::string path
= hex2str (p
);
884 set_inferior_cwd (path
.c_str ());
887 debug_printf (_("[Set the inferior's current directory to %s]\n"),
892 /* An empty argument means that we should clear out any
893 previously set cwd for the inferior. */
894 set_inferior_cwd (NULL
);
898 [Unset the inferior's current directory; will use gdbserver's cwd]\n"));
905 /* Otherwise we didn't know what packet it was. Say we didn't
911 get_features_xml (const char *annex
)
913 const struct target_desc
*desc
= current_target_desc ();
915 /* `desc->xmltarget' defines what to return when looking for the
916 "target.xml" file. Its contents can either be verbatim XML code
917 (prefixed with a '@') or else the name of the actual XML file to
918 be used in place of "target.xml".
920 This variable is set up from the auto-generated
921 init_registers_... routine for the current target. */
923 if (strcmp (annex
, "target.xml") == 0)
925 const char *ret
= tdesc_get_features_xml (desc
);
935 extern const char *const xml_builtin
[][2];
938 /* Look for the annex. */
939 for (i
= 0; xml_builtin
[i
][0] != NULL
; i
++)
940 if (strcmp (annex
, xml_builtin
[i
][0]) == 0)
943 if (xml_builtin
[i
][0] != NULL
)
944 return xml_builtin
[i
][1];
952 monitor_show_help (void)
954 monitor_output ("The following monitor commands are supported:\n");
955 monitor_output (" set debug <0|1>\n");
956 monitor_output (" Enable general debugging messages\n");
957 monitor_output (" set debug-hw-points <0|1>\n");
958 monitor_output (" Enable h/w breakpoint/watchpoint debugging messages\n");
959 monitor_output (" set remote-debug <0|1>\n");
960 monitor_output (" Enable remote protocol debugging messages\n");
961 monitor_output (" set debug-format option1[,option2,...]\n");
962 monitor_output (" Add additional information to debugging messages\n");
963 monitor_output (" Options: all, none");
964 monitor_output (", timestamp");
965 monitor_output ("\n");
966 monitor_output (" exit\n");
967 monitor_output (" Quit GDBserver\n");
970 /* Read trace frame or inferior memory. Returns the number of bytes
971 actually read, zero when no further transfer is possible, and -1 on
972 error. Return of a positive value smaller than LEN does not
973 indicate there's no more to be read, only the end of the transfer.
974 E.g., when GDB reads memory from a traceframe, a first request may
975 be served from a memory block that does not cover the whole request
976 length. A following request gets the rest served from either
977 another block (of the same traceframe) or from the read-only
981 gdb_read_memory (CORE_ADDR memaddr
, unsigned char *myaddr
, int len
)
983 client_state
&cs
= get_client_state ();
986 if (cs
.current_traceframe
>= 0)
989 ULONGEST length
= len
;
991 if (traceframe_read_mem (cs
.current_traceframe
,
992 memaddr
, myaddr
, len
, &nbytes
))
994 /* Data read from trace buffer, we're done. */
997 if (!in_readonly_region (memaddr
, length
))
999 /* Otherwise we have a valid readonly case, fall through. */
1000 /* (assume no half-trace half-real blocks for now) */
1003 res
= prepare_to_access_memory ();
1006 if (set_desired_thread ())
1007 res
= read_inferior_memory (memaddr
, myaddr
, len
);
1010 done_accessing_memory ();
1012 return res
== 0 ? len
: -1;
1018 /* Write trace frame or inferior memory. Actually, writing to trace
1019 frames is forbidden. */
1022 gdb_write_memory (CORE_ADDR memaddr
, const unsigned char *myaddr
, int len
)
1024 client_state
&cs
= get_client_state ();
1025 if (cs
.current_traceframe
>= 0)
1031 ret
= prepare_to_access_memory ();
1034 if (set_desired_thread ())
1035 ret
= write_inferior_memory (memaddr
, myaddr
, len
);
1038 done_accessing_memory ();
1044 /* Subroutine of handle_search_memory to simplify it. */
1047 handle_search_memory_1 (CORE_ADDR start_addr
, CORE_ADDR search_space_len
,
1048 gdb_byte
*pattern
, unsigned pattern_len
,
1049 gdb_byte
*search_buf
,
1050 unsigned chunk_size
, unsigned search_buf_size
,
1051 CORE_ADDR
*found_addrp
)
1053 /* Prime the search buffer. */
1055 if (gdb_read_memory (start_addr
, search_buf
, search_buf_size
)
1058 warning ("Unable to access %ld bytes of target "
1059 "memory at 0x%lx, halting search.",
1060 (long) search_buf_size
, (long) start_addr
);
1064 /* Perform the search.
1066 The loop is kept simple by allocating [N + pattern-length - 1] bytes.
1067 When we've scanned N bytes we copy the trailing bytes to the start and
1068 read in another N bytes. */
1070 while (search_space_len
>= pattern_len
)
1072 gdb_byte
*found_ptr
;
1073 unsigned nr_search_bytes
= (search_space_len
< search_buf_size
1077 found_ptr
= (gdb_byte
*) memmem (search_buf
, nr_search_bytes
, pattern
,
1080 if (found_ptr
!= NULL
)
1082 CORE_ADDR found_addr
= start_addr
+ (found_ptr
- search_buf
);
1083 *found_addrp
= found_addr
;
1087 /* Not found in this chunk, skip to next chunk. */
1089 /* Don't let search_space_len wrap here, it's unsigned. */
1090 if (search_space_len
>= chunk_size
)
1091 search_space_len
-= chunk_size
;
1093 search_space_len
= 0;
1095 if (search_space_len
>= pattern_len
)
1097 unsigned keep_len
= search_buf_size
- chunk_size
;
1098 CORE_ADDR read_addr
= start_addr
+ chunk_size
+ keep_len
;
1101 /* Copy the trailing part of the previous iteration to the front
1102 of the buffer for the next iteration. */
1103 memcpy (search_buf
, search_buf
+ chunk_size
, keep_len
);
1105 nr_to_read
= (search_space_len
- keep_len
< chunk_size
1106 ? search_space_len
- keep_len
1109 if (gdb_read_memory (read_addr
, search_buf
+ keep_len
,
1110 nr_to_read
) != search_buf_size
)
1112 warning ("Unable to access %ld bytes of target memory "
1113 "at 0x%lx, halting search.",
1114 (long) nr_to_read
, (long) read_addr
);
1118 start_addr
+= chunk_size
;
1127 /* Handle qSearch:memory packets. */
1130 handle_search_memory (char *own_buf
, int packet_len
)
1132 CORE_ADDR start_addr
;
1133 CORE_ADDR search_space_len
;
1135 unsigned int pattern_len
;
1136 /* NOTE: also defined in find.c testcase. */
1137 #define SEARCH_CHUNK_SIZE 16000
1138 const unsigned chunk_size
= SEARCH_CHUNK_SIZE
;
1139 /* Buffer to hold memory contents for searching. */
1140 gdb_byte
*search_buf
;
1141 unsigned search_buf_size
;
1143 CORE_ADDR found_addr
;
1144 int cmd_name_len
= sizeof ("qSearch:memory:") - 1;
1146 pattern
= (gdb_byte
*) malloc (packet_len
);
1147 if (pattern
== NULL
)
1149 error ("Unable to allocate memory to perform the search");
1150 strcpy (own_buf
, "E00");
1153 if (decode_search_memory_packet (own_buf
+ cmd_name_len
,
1154 packet_len
- cmd_name_len
,
1155 &start_addr
, &search_space_len
,
1156 pattern
, &pattern_len
) < 0)
1159 error ("Error in parsing qSearch:memory packet");
1160 strcpy (own_buf
, "E00");
1164 search_buf_size
= chunk_size
+ pattern_len
- 1;
1166 /* No point in trying to allocate a buffer larger than the search space. */
1167 if (search_space_len
< search_buf_size
)
1168 search_buf_size
= search_space_len
;
1170 search_buf
= (gdb_byte
*) malloc (search_buf_size
);
1171 if (search_buf
== NULL
)
1174 error ("Unable to allocate memory to perform the search");
1175 strcpy (own_buf
, "E00");
1179 found
= handle_search_memory_1 (start_addr
, search_space_len
,
1180 pattern
, pattern_len
,
1181 search_buf
, chunk_size
, search_buf_size
,
1185 sprintf (own_buf
, "1,%lx", (long) found_addr
);
1186 else if (found
== 0)
1187 strcpy (own_buf
, "0");
1189 strcpy (own_buf
, "E00");
1195 /* Handle the "D" packet. */
1198 handle_detach (char *own_buf
)
1200 client_state
&cs
= get_client_state ();
1202 process_info
*process
;
1204 if (cs
.multi_process
)
1207 int pid
= strtol (&own_buf
[2], NULL
, 16);
1209 process
= find_process_pid (pid
);
1213 process
= (current_thread
!= nullptr
1214 ? get_thread_process (current_thread
)
1218 if (process
== NULL
)
1220 write_enn (own_buf
);
1224 if ((tracing
&& disconnected_tracing
) || any_persistent_commands (process
))
1226 if (tracing
&& disconnected_tracing
)
1228 "Disconnected tracing in effect, "
1229 "leaving gdbserver attached to the process\n");
1231 if (any_persistent_commands (process
))
1233 "Persistent commands are present, "
1234 "leaving gdbserver attached to the process\n");
1236 /* Make sure we're in non-stop/async mode, so we we can both
1237 wait for an async socket accept, and handle async target
1238 events simultaneously. There's also no point either in
1239 having the target stop all threads, when we're going to
1240 pass signals down without informing GDB. */
1244 debug_printf ("Forcing non-stop mode\n");
1250 process
->gdb_detached
= 1;
1252 /* Detaching implicitly resumes all threads. */
1253 target_continue_no_signal (minus_one_ptid
);
1259 fprintf (stderr
, "Detaching from process %d\n", process
->pid
);
1262 /* We'll need this after PROCESS has been destroyed. */
1263 int pid
= process
->pid
;
1265 if (detach_inferior (process
) != 0)
1266 write_enn (own_buf
);
1269 discard_queued_stop_replies (ptid_t (pid
));
1272 if (extended_protocol
|| target_running ())
1274 /* There is still at least one inferior remaining or
1275 we are in extended mode, so don't terminate gdbserver,
1276 and instead treat this like a normal program exit. */
1277 cs
.last_status
.kind
= TARGET_WAITKIND_EXITED
;
1278 cs
.last_status
.value
.integer
= 0;
1279 cs
.last_ptid
= ptid_t (pid
);
1281 current_thread
= NULL
;
1288 /* If we are attached, then we can exit. Otherwise, we
1289 need to hang around doing nothing, until the child is
1291 join_inferior (pid
);
1297 /* Parse options to --debug-format= and "monitor set debug-format".
1298 ARG is the text after "--debug-format=" or "monitor set debug-format".
1299 IS_MONITOR is non-zero if we're invoked via "monitor set debug-format".
1300 This triggers calls to monitor_output.
1301 The result is an empty string if all options were parsed ok, otherwise an
1302 error message which the caller must free.
1304 N.B. These commands affect all debug format settings, they are not
1305 cumulative. If a format is not specified, it is turned off.
1306 However, we don't go to extra trouble with things like
1307 "monitor set debug-format all,none,timestamp".
1308 Instead we just parse them one at a time, in order.
1310 The syntax for "monitor set debug" we support here is not identical
1311 to gdb's "set debug foo on|off" because we also use this function to
1312 parse "--debug-format=foo,bar". */
1315 parse_debug_format_options (const char *arg
, int is_monitor
)
1317 /* First turn all debug format options off. */
1318 debug_timestamp
= 0;
1320 /* First remove leading spaces, for "monitor set debug-format". */
1321 while (isspace (*arg
))
1324 std::vector
<gdb::unique_xmalloc_ptr
<char>> options
1325 = delim_string_to_char_ptr_vec (arg
, ',');
1327 for (const gdb::unique_xmalloc_ptr
<char> &option
: options
)
1329 if (strcmp (option
.get (), "all") == 0)
1331 debug_timestamp
= 1;
1333 monitor_output ("All extra debug format options enabled.\n");
1335 else if (strcmp (option
.get (), "none") == 0)
1337 debug_timestamp
= 0;
1339 monitor_output ("All extra debug format options disabled.\n");
1341 else if (strcmp (option
.get (), "timestamp") == 0)
1343 debug_timestamp
= 1;
1345 monitor_output ("Timestamps will be added to debug output.\n");
1347 else if (*option
== '\0')
1349 /* An empty option, e.g., "--debug-format=foo,,bar", is ignored. */
1353 return string_printf ("Unknown debug-format argument: \"%s\"\n",
1357 return std::string ();
1360 /* Handle monitor commands not handled by target-specific handlers. */
1363 handle_monitor_command (char *mon
, char *own_buf
)
1365 if (strcmp (mon
, "set debug 1") == 0)
1368 monitor_output ("Debug output enabled.\n");
1370 else if (strcmp (mon
, "set debug 0") == 0)
1373 monitor_output ("Debug output disabled.\n");
1375 else if (strcmp (mon
, "set debug-hw-points 1") == 0)
1377 show_debug_regs
= 1;
1378 monitor_output ("H/W point debugging output enabled.\n");
1380 else if (strcmp (mon
, "set debug-hw-points 0") == 0)
1382 show_debug_regs
= 0;
1383 monitor_output ("H/W point debugging output disabled.\n");
1385 else if (strcmp (mon
, "set remote-debug 1") == 0)
1388 monitor_output ("Protocol debug output enabled.\n");
1390 else if (strcmp (mon
, "set remote-debug 0") == 0)
1393 monitor_output ("Protocol debug output disabled.\n");
1395 else if (startswith (mon
, "set debug-format "))
1397 std::string error_msg
1398 = parse_debug_format_options (mon
+ sizeof ("set debug-format ") - 1,
1401 if (!error_msg
.empty ())
1403 monitor_output (error_msg
.c_str ());
1404 monitor_show_help ();
1405 write_enn (own_buf
);
1408 else if (strcmp (mon
, "help") == 0)
1409 monitor_show_help ();
1410 else if (strcmp (mon
, "exit") == 0)
1414 monitor_output ("Unknown monitor command.\n\n");
1415 monitor_show_help ();
1416 write_enn (own_buf
);
1420 /* Associates a callback with each supported qXfer'able object. */
1424 /* The object this handler handles. */
1427 /* Request that the target transfer up to LEN 8-bit bytes of the
1428 target's OBJECT. The OFFSET, for a seekable object, specifies
1429 the starting point. The ANNEX can be used to provide additional
1430 data-specific information to the target.
1432 Return the number of bytes actually transfered, zero when no
1433 further transfer is possible, -1 on error, -2 when the transfer
1434 is not supported, and -3 on a verbose error message that should
1435 be preserved. Return of a positive value smaller than LEN does
1436 not indicate the end of the object, only the end of the transfer.
1438 One, and only one, of readbuf or writebuf must be non-NULL. */
1439 int (*xfer
) (const char *annex
,
1440 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1441 ULONGEST offset
, LONGEST len
);
1444 /* Handle qXfer:auxv:read. */
1447 handle_qxfer_auxv (const char *annex
,
1448 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1449 ULONGEST offset
, LONGEST len
)
1451 if (the_target
->read_auxv
== NULL
|| writebuf
!= NULL
)
1454 if (annex
[0] != '\0' || current_thread
== NULL
)
1457 return (*the_target
->read_auxv
) (offset
, readbuf
, len
);
1460 /* Handle qXfer:exec-file:read. */
1463 handle_qxfer_exec_file (const char *annex
,
1464 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1465 ULONGEST offset
, LONGEST len
)
1471 if (the_target
->pid_to_exec_file
== NULL
|| writebuf
!= NULL
)
1474 if (annex
[0] == '\0')
1476 if (current_thread
== NULL
)
1479 pid
= pid_of (current_thread
);
1483 annex
= unpack_varlen_hex (annex
, &pid
);
1484 if (annex
[0] != '\0')
1491 file
= (*the_target
->pid_to_exec_file
) (pid
);
1495 total_len
= strlen (file
);
1497 if (offset
> total_len
)
1500 if (offset
+ len
> total_len
)
1501 len
= total_len
- offset
;
1503 memcpy (readbuf
, file
+ offset
, len
);
1507 /* Handle qXfer:features:read. */
1510 handle_qxfer_features (const char *annex
,
1511 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1512 ULONGEST offset
, LONGEST len
)
1514 const char *document
;
1517 if (writebuf
!= NULL
)
1520 if (!target_running ())
1523 /* Grab the correct annex. */
1524 document
= get_features_xml (annex
);
1525 if (document
== NULL
)
1528 total_len
= strlen (document
);
1530 if (offset
> total_len
)
1533 if (offset
+ len
> total_len
)
1534 len
= total_len
- offset
;
1536 memcpy (readbuf
, document
+ offset
, len
);
1540 /* Handle qXfer:libraries:read. */
1543 handle_qxfer_libraries (const char *annex
,
1544 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1545 ULONGEST offset
, LONGEST len
)
1547 if (writebuf
!= NULL
)
1550 if (annex
[0] != '\0' || current_thread
== NULL
)
1553 std::string document
= "<library-list version=\"1.0\">\n";
1555 for (const dll_info
&dll
: all_dlls
)
1556 document
+= string_printf
1557 (" <library name=\"%s\"><segment address=\"0x%lx\"/></library>\n",
1558 dll
.name
.c_str (), (long) dll
.base_addr
);
1560 document
+= "</library-list>\n";
1562 if (offset
> document
.length ())
1565 if (offset
+ len
> document
.length ())
1566 len
= document
.length () - offset
;
1568 memcpy (readbuf
, &document
[offset
], len
);
1573 /* Handle qXfer:libraries-svr4:read. */
1576 handle_qxfer_libraries_svr4 (const char *annex
,
1577 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1578 ULONGEST offset
, LONGEST len
)
1580 if (writebuf
!= NULL
)
1583 if (current_thread
== NULL
|| the_target
->qxfer_libraries_svr4
== NULL
)
1586 return the_target
->qxfer_libraries_svr4 (annex
, readbuf
, writebuf
, offset
, len
);
1589 /* Handle qXfer:osadata:read. */
1592 handle_qxfer_osdata (const char *annex
,
1593 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1594 ULONGEST offset
, LONGEST len
)
1596 if (the_target
->qxfer_osdata
== NULL
|| writebuf
!= NULL
)
1599 return (*the_target
->qxfer_osdata
) (annex
, readbuf
, NULL
, offset
, len
);
1602 /* Handle qXfer:siginfo:read and qXfer:siginfo:write. */
1605 handle_qxfer_siginfo (const char *annex
,
1606 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1607 ULONGEST offset
, LONGEST len
)
1609 if (the_target
->qxfer_siginfo
== NULL
)
1612 if (annex
[0] != '\0' || current_thread
== NULL
)
1615 return (*the_target
->qxfer_siginfo
) (annex
, readbuf
, writebuf
, offset
, len
);
1618 /* Handle qXfer:spu:read and qXfer:spu:write. */
1621 handle_qxfer_spu (const char *annex
,
1622 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1623 ULONGEST offset
, LONGEST len
)
1625 if (the_target
->qxfer_spu
== NULL
)
1628 if (current_thread
== NULL
)
1631 return (*the_target
->qxfer_spu
) (annex
, readbuf
, writebuf
, offset
, len
);
1634 /* Handle qXfer:statictrace:read. */
1637 handle_qxfer_statictrace (const char *annex
,
1638 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1639 ULONGEST offset
, LONGEST len
)
1641 client_state
&cs
= get_client_state ();
1644 if (writebuf
!= NULL
)
1647 if (annex
[0] != '\0' || current_thread
== NULL
1648 || cs
.current_traceframe
== -1)
1651 if (traceframe_read_sdata (cs
.current_traceframe
, offset
,
1652 readbuf
, len
, &nbytes
))
1657 /* Helper for handle_qxfer_threads_proper.
1658 Emit the XML to describe the thread of INF. */
1661 handle_qxfer_threads_worker (thread_info
*thread
, struct buffer
*buffer
)
1663 ptid_t ptid
= ptid_of (thread
);
1665 int core
= target_core_of_thread (ptid
);
1667 const char *name
= target_thread_name (ptid
);
1670 bool handle_status
= target_thread_handle (ptid
, &handle
, &handle_len
);
1672 write_ptid (ptid_s
, ptid
);
1674 buffer_xml_printf (buffer
, "<thread id=\"%s\"", ptid_s
);
1678 sprintf (core_s
, "%d", core
);
1679 buffer_xml_printf (buffer
, " core=\"%s\"", core_s
);
1683 buffer_xml_printf (buffer
, " name=\"%s\"", name
);
1687 char *handle_s
= (char *) alloca (handle_len
* 2 + 1);
1688 bin2hex (handle
, handle_s
, handle_len
);
1689 buffer_xml_printf (buffer
, " handle=\"%s\"", handle_s
);
1692 buffer_xml_printf (buffer
, "/>\n");
1695 /* Helper for handle_qxfer_threads. */
1698 handle_qxfer_threads_proper (struct buffer
*buffer
)
1700 buffer_grow_str (buffer
, "<threads>\n");
1702 for_each_thread ([&] (thread_info
*thread
)
1704 handle_qxfer_threads_worker (thread
, buffer
);
1707 buffer_grow_str0 (buffer
, "</threads>\n");
1710 /* Handle qXfer:threads:read. */
1713 handle_qxfer_threads (const char *annex
,
1714 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1715 ULONGEST offset
, LONGEST len
)
1717 static char *result
= 0;
1718 static unsigned int result_length
= 0;
1720 if (writebuf
!= NULL
)
1723 if (annex
[0] != '\0')
1728 struct buffer buffer
;
1729 /* When asked for data at offset 0, generate everything and store into
1730 'result'. Successive reads will be served off 'result'. */
1734 buffer_init (&buffer
);
1736 handle_qxfer_threads_proper (&buffer
);
1738 result
= buffer_finish (&buffer
);
1739 result_length
= strlen (result
);
1740 buffer_free (&buffer
);
1743 if (offset
>= result_length
)
1745 /* We're out of data. */
1752 if (len
> result_length
- offset
)
1753 len
= result_length
- offset
;
1755 memcpy (readbuf
, result
+ offset
, len
);
1760 /* Handle qXfer:traceframe-info:read. */
1763 handle_qxfer_traceframe_info (const char *annex
,
1764 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1765 ULONGEST offset
, LONGEST len
)
1767 client_state
&cs
= get_client_state ();
1768 static char *result
= 0;
1769 static unsigned int result_length
= 0;
1771 if (writebuf
!= NULL
)
1774 if (!target_running () || annex
[0] != '\0' || cs
.current_traceframe
== -1)
1779 struct buffer buffer
;
1781 /* When asked for data at offset 0, generate everything and
1782 store into 'result'. Successive reads will be served off
1786 buffer_init (&buffer
);
1788 traceframe_read_info (cs
.current_traceframe
, &buffer
);
1790 result
= buffer_finish (&buffer
);
1791 result_length
= strlen (result
);
1792 buffer_free (&buffer
);
1795 if (offset
>= result_length
)
1797 /* We're out of data. */
1804 if (len
> result_length
- offset
)
1805 len
= result_length
- offset
;
1807 memcpy (readbuf
, result
+ offset
, len
);
1811 /* Handle qXfer:fdpic:read. */
1814 handle_qxfer_fdpic (const char *annex
, gdb_byte
*readbuf
,
1815 const gdb_byte
*writebuf
, ULONGEST offset
, LONGEST len
)
1817 if (the_target
->read_loadmap
== NULL
)
1820 if (current_thread
== NULL
)
1823 return (*the_target
->read_loadmap
) (annex
, offset
, readbuf
, len
);
1826 /* Handle qXfer:btrace:read. */
1829 handle_qxfer_btrace (const char *annex
,
1830 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1831 ULONGEST offset
, LONGEST len
)
1833 client_state
&cs
= get_client_state ();
1834 static struct buffer cache
;
1835 struct thread_info
*thread
;
1836 enum btrace_read_type type
;
1839 if (writebuf
!= NULL
)
1842 if (cs
.general_thread
== null_ptid
1843 || cs
.general_thread
== minus_one_ptid
)
1845 strcpy (cs
.own_buf
, "E.Must select a single thread.");
1849 thread
= find_thread_ptid (cs
.general_thread
);
1852 strcpy (cs
.own_buf
, "E.No such thread.");
1856 if (thread
->btrace
== NULL
)
1858 strcpy (cs
.own_buf
, "E.Btrace not enabled.");
1862 if (strcmp (annex
, "all") == 0)
1863 type
= BTRACE_READ_ALL
;
1864 else if (strcmp (annex
, "new") == 0)
1865 type
= BTRACE_READ_NEW
;
1866 else if (strcmp (annex
, "delta") == 0)
1867 type
= BTRACE_READ_DELTA
;
1870 strcpy (cs
.own_buf
, "E.Bad annex.");
1876 buffer_free (&cache
);
1880 result
= target_read_btrace (thread
->btrace
, &cache
, type
);
1882 memcpy (cs
.own_buf
, cache
.buffer
, cache
.used_size
);
1884 CATCH (exception
, RETURN_MASK_ERROR
)
1886 sprintf (cs
.own_buf
, "E.%s", exception
.message
);
1894 else if (offset
> cache
.used_size
)
1896 buffer_free (&cache
);
1900 if (len
> cache
.used_size
- offset
)
1901 len
= cache
.used_size
- offset
;
1903 memcpy (readbuf
, cache
.buffer
+ offset
, len
);
1908 /* Handle qXfer:btrace-conf:read. */
1911 handle_qxfer_btrace_conf (const char *annex
,
1912 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1913 ULONGEST offset
, LONGEST len
)
1915 client_state
&cs
= get_client_state ();
1916 static struct buffer cache
;
1917 struct thread_info
*thread
;
1920 if (writebuf
!= NULL
)
1923 if (annex
[0] != '\0')
1926 if (cs
.general_thread
== null_ptid
1927 || cs
.general_thread
== minus_one_ptid
)
1929 strcpy (cs
.own_buf
, "E.Must select a single thread.");
1933 thread
= find_thread_ptid (cs
.general_thread
);
1936 strcpy (cs
.own_buf
, "E.No such thread.");
1940 if (thread
->btrace
== NULL
)
1942 strcpy (cs
.own_buf
, "E.Btrace not enabled.");
1948 buffer_free (&cache
);
1952 result
= target_read_btrace_conf (thread
->btrace
, &cache
);
1954 memcpy (cs
.own_buf
, cache
.buffer
, cache
.used_size
);
1956 CATCH (exception
, RETURN_MASK_ERROR
)
1958 sprintf (cs
.own_buf
, "E.%s", exception
.message
);
1966 else if (offset
> cache
.used_size
)
1968 buffer_free (&cache
);
1972 if (len
> cache
.used_size
- offset
)
1973 len
= cache
.used_size
- offset
;
1975 memcpy (readbuf
, cache
.buffer
+ offset
, len
);
1980 static const struct qxfer qxfer_packets
[] =
1982 { "auxv", handle_qxfer_auxv
},
1983 { "btrace", handle_qxfer_btrace
},
1984 { "btrace-conf", handle_qxfer_btrace_conf
},
1985 { "exec-file", handle_qxfer_exec_file
},
1986 { "fdpic", handle_qxfer_fdpic
},
1987 { "features", handle_qxfer_features
},
1988 { "libraries", handle_qxfer_libraries
},
1989 { "libraries-svr4", handle_qxfer_libraries_svr4
},
1990 { "osdata", handle_qxfer_osdata
},
1991 { "siginfo", handle_qxfer_siginfo
},
1992 { "spu", handle_qxfer_spu
},
1993 { "statictrace", handle_qxfer_statictrace
},
1994 { "threads", handle_qxfer_threads
},
1995 { "traceframe-info", handle_qxfer_traceframe_info
},
1999 handle_qxfer (char *own_buf
, int packet_len
, int *new_packet_len_p
)
2007 if (!startswith (own_buf
, "qXfer:"))
2010 /* Grab the object, r/w and annex. */
2011 if (decode_xfer (own_buf
+ 6, &object
, &rw
, &annex
, &offset
) < 0)
2013 write_enn (own_buf
);
2018 i
< sizeof (qxfer_packets
) / sizeof (qxfer_packets
[0]);
2021 const struct qxfer
*q
= &qxfer_packets
[i
];
2023 if (strcmp (object
, q
->object
) == 0)
2025 if (strcmp (rw
, "read") == 0)
2027 unsigned char *data
;
2032 /* Grab the offset and length. */
2033 if (decode_xfer_read (offset
, &ofs
, &len
) < 0)
2035 write_enn (own_buf
);
2039 /* Read one extra byte, as an indicator of whether there is
2041 if (len
> PBUFSIZ
- 2)
2043 data
= (unsigned char *) malloc (len
+ 1);
2046 write_enn (own_buf
);
2049 n
= (*q
->xfer
) (annex
, data
, NULL
, ofs
, len
+ 1);
2057 /* Preserve error message. */
2060 write_enn (own_buf
);
2062 *new_packet_len_p
= write_qxfer_response (own_buf
, data
, len
, 1);
2064 *new_packet_len_p
= write_qxfer_response (own_buf
, data
, n
, 0);
2069 else if (strcmp (rw
, "write") == 0)
2074 unsigned char *data
;
2076 strcpy (own_buf
, "E00");
2077 data
= (unsigned char *) malloc (packet_len
- (offset
- own_buf
));
2080 write_enn (own_buf
);
2083 if (decode_xfer_write (offset
, packet_len
- (offset
- own_buf
),
2084 &ofs
, &len
, data
) < 0)
2087 write_enn (own_buf
);
2091 n
= (*q
->xfer
) (annex
, NULL
, data
, ofs
, len
);
2099 /* Preserve error message. */
2102 write_enn (own_buf
);
2104 sprintf (own_buf
, "%x", n
);
2117 /* Compute 32 bit CRC from inferior memory.
2119 On success, return 32 bit CRC.
2120 On failure, return (unsigned long long) -1. */
2122 static unsigned long long
2123 crc32 (CORE_ADDR base
, int len
, unsigned int crc
)
2127 unsigned char byte
= 0;
2129 /* Return failure if memory read fails. */
2130 if (read_inferior_memory (base
, &byte
, 1) != 0)
2131 return (unsigned long long) -1;
2133 crc
= xcrc32 (&byte
, 1, crc
);
2136 return (unsigned long long) crc
;
2139 /* Add supported btrace packets to BUF. */
2142 supported_btrace_packets (char *buf
)
2144 strcat (buf
, ";Qbtrace:bts+");
2145 strcat (buf
, ";Qbtrace-conf:bts:size+");
2146 strcat (buf
, ";Qbtrace:pt+");
2147 strcat (buf
, ";Qbtrace-conf:pt:size+");
2148 strcat (buf
, ";Qbtrace:off+");
2149 strcat (buf
, ";qXfer:btrace:read+");
2150 strcat (buf
, ";qXfer:btrace-conf:read+");
2153 /* Handle all of the extended 'q' packets. */
2156 handle_query (char *own_buf
, int packet_len
, int *new_packet_len_p
)
2158 client_state
&cs
= get_client_state ();
2159 static std::list
<thread_info
*>::const_iterator thread_iter
;
2161 /* Reply the current thread id. */
2162 if (strcmp ("qC", own_buf
) == 0 && !disable_packet_qC
)
2165 require_running_or_return (own_buf
);
2167 if (cs
.general_thread
!= null_ptid
&& cs
.general_thread
!= minus_one_ptid
)
2168 ptid
= cs
.general_thread
;
2171 thread_iter
= all_threads
.begin ();
2172 ptid
= (*thread_iter
)->id
;
2175 sprintf (own_buf
, "QC");
2177 write_ptid (own_buf
, ptid
);
2181 if (strcmp ("qSymbol::", own_buf
) == 0)
2183 struct thread_info
*save_thread
= current_thread
;
2185 /* For qSymbol, GDB only changes the current thread if the
2186 previous current thread was of a different process. So if
2187 the previous thread is gone, we need to pick another one of
2188 the same process. This can happen e.g., if we followed an
2189 exec in a non-leader thread. */
2190 if (current_thread
== NULL
)
2193 = find_any_thread_of_pid (cs
.general_thread
.pid ());
2195 /* Just in case, if we didn't find a thread, then bail out
2196 instead of crashing. */
2197 if (current_thread
== NULL
)
2199 write_enn (own_buf
);
2200 current_thread
= save_thread
;
2205 /* GDB is suggesting new symbols have been loaded. This may
2206 mean a new shared library has been detected as loaded, so
2207 take the opportunity to check if breakpoints we think are
2208 inserted, still are. Note that it isn't guaranteed that
2209 we'll see this when a shared library is loaded, and nor will
2210 we see this for unloads (although breakpoints in unloaded
2211 libraries shouldn't trigger), as GDB may not find symbols for
2212 the library at all. We also re-validate breakpoints when we
2213 see a second GDB breakpoint for the same address, and or when
2214 we access breakpoint shadows. */
2215 validate_breakpoints ();
2217 if (target_supports_tracepoints ())
2218 tracepoint_look_up_symbols ();
2220 if (current_thread
!= NULL
&& the_target
->look_up_symbols
!= NULL
)
2221 (*the_target
->look_up_symbols
) ();
2223 current_thread
= save_thread
;
2225 strcpy (own_buf
, "OK");
2229 if (!disable_packet_qfThreadInfo
)
2231 if (strcmp ("qfThreadInfo", own_buf
) == 0)
2233 require_running_or_return (own_buf
);
2234 thread_iter
= all_threads
.begin ();
2237 ptid_t ptid
= (*thread_iter
)->id
;
2238 write_ptid (own_buf
, ptid
);
2243 if (strcmp ("qsThreadInfo", own_buf
) == 0)
2245 require_running_or_return (own_buf
);
2246 if (thread_iter
!= all_threads
.end ())
2249 ptid_t ptid
= (*thread_iter
)->id
;
2250 write_ptid (own_buf
, ptid
);
2256 sprintf (own_buf
, "l");
2262 if (the_target
->read_offsets
!= NULL
2263 && strcmp ("qOffsets", own_buf
) == 0)
2265 CORE_ADDR text
, data
;
2267 require_running_or_return (own_buf
);
2268 if (the_target
->read_offsets (&text
, &data
))
2269 sprintf (own_buf
, "Text=%lX;Data=%lX;Bss=%lX",
2270 (long)text
, (long)data
, (long)data
);
2272 write_enn (own_buf
);
2277 /* Protocol features query. */
2278 if (startswith (own_buf
, "qSupported")
2279 && (own_buf
[10] == ':' || own_buf
[10] == '\0'))
2281 char *p
= &own_buf
[10];
2282 int gdb_supports_qRelocInsn
= 0;
2284 /* Process each feature being provided by GDB. The first
2285 feature will follow a ':', and latter features will follow
2289 char **qsupported
= NULL
;
2294 /* Two passes, to avoid nested strtok calls in
2295 target_process_qsupported. */
2296 for (p
= strtok (p
+ 1, ";");
2298 p
= strtok (NULL
, ";"))
2301 qsupported
= XRESIZEVEC (char *, qsupported
, count
);
2302 qsupported
[count
- 1] = xstrdup (p
);
2305 for (i
= 0; i
< count
; i
++)
2308 if (strcmp (p
, "multiprocess+") == 0)
2310 /* GDB supports and wants multi-process support if
2312 if (target_supports_multi_process ())
2313 cs
.multi_process
= 1;
2315 else if (strcmp (p
, "qRelocInsn+") == 0)
2317 /* GDB supports relocate instruction requests. */
2318 gdb_supports_qRelocInsn
= 1;
2320 else if (strcmp (p
, "swbreak+") == 0)
2322 /* GDB wants us to report whether a trap is caused
2323 by a software breakpoint and for us to handle PC
2324 adjustment if necessary on this target. */
2325 if (target_supports_stopped_by_sw_breakpoint ())
2326 cs
.swbreak_feature
= 1;
2328 else if (strcmp (p
, "hwbreak+") == 0)
2330 /* GDB wants us to report whether a trap is caused
2331 by a hardware breakpoint. */
2332 if (target_supports_stopped_by_hw_breakpoint ())
2333 cs
.hwbreak_feature
= 1;
2335 else if (strcmp (p
, "fork-events+") == 0)
2337 /* GDB supports and wants fork events if possible. */
2338 if (target_supports_fork_events ())
2339 cs
.report_fork_events
= 1;
2341 else if (strcmp (p
, "vfork-events+") == 0)
2343 /* GDB supports and wants vfork events if possible. */
2344 if (target_supports_vfork_events ())
2345 cs
.report_vfork_events
= 1;
2347 else if (strcmp (p
, "exec-events+") == 0)
2349 /* GDB supports and wants exec events if possible. */
2350 if (target_supports_exec_events ())
2351 cs
.report_exec_events
= 1;
2353 else if (strcmp (p
, "vContSupported+") == 0)
2354 cs
.vCont_supported
= 1;
2355 else if (strcmp (p
, "QThreadEvents+") == 0)
2357 else if (strcmp (p
, "no-resumed+") == 0)
2359 /* GDB supports and wants TARGET_WAITKIND_NO_RESUMED
2361 report_no_resumed
= 1;
2365 /* Move the unknown features all together. */
2366 qsupported
[i
] = NULL
;
2367 qsupported
[unknown
] = p
;
2372 /* Give the target backend a chance to process the unknown
2374 target_process_qsupported (qsupported
, unknown
);
2376 for (i
= 0; i
< count
; i
++)
2377 free (qsupported
[i
]);
2382 "PacketSize=%x;QPassSignals+;QProgramSignals+;"
2383 "QStartupWithShell+;QEnvironmentHexEncoded+;"
2384 "QEnvironmentReset+;QEnvironmentUnset+;"
2388 if (target_supports_catch_syscall ())
2389 strcat (own_buf
, ";QCatchSyscalls+");
2391 if (the_target
->qxfer_libraries_svr4
!= NULL
)
2392 strcat (own_buf
, ";qXfer:libraries-svr4:read+"
2393 ";augmented-libraries-svr4-read+");
2396 /* We do not have any hook to indicate whether the non-SVR4 target
2397 backend supports qXfer:libraries:read, so always report it. */
2398 strcat (own_buf
, ";qXfer:libraries:read+");
2401 if (the_target
->read_auxv
!= NULL
)
2402 strcat (own_buf
, ";qXfer:auxv:read+");
2404 if (the_target
->qxfer_spu
!= NULL
)
2405 strcat (own_buf
, ";qXfer:spu:read+;qXfer:spu:write+");
2407 if (the_target
->qxfer_siginfo
!= NULL
)
2408 strcat (own_buf
, ";qXfer:siginfo:read+;qXfer:siginfo:write+");
2410 if (the_target
->read_loadmap
!= NULL
)
2411 strcat (own_buf
, ";qXfer:fdpic:read+");
2413 /* We always report qXfer:features:read, as targets may
2414 install XML files on a subsequent call to arch_setup.
2415 If we reported to GDB on startup that we don't support
2416 qXfer:feature:read at all, we will never be re-queried. */
2417 strcat (own_buf
, ";qXfer:features:read+");
2419 if (cs
.transport_is_reliable
)
2420 strcat (own_buf
, ";QStartNoAckMode+");
2422 if (the_target
->qxfer_osdata
!= NULL
)
2423 strcat (own_buf
, ";qXfer:osdata:read+");
2425 if (target_supports_multi_process ())
2426 strcat (own_buf
, ";multiprocess+");
2428 if (target_supports_fork_events ())
2429 strcat (own_buf
, ";fork-events+");
2431 if (target_supports_vfork_events ())
2432 strcat (own_buf
, ";vfork-events+");
2434 if (target_supports_exec_events ())
2435 strcat (own_buf
, ";exec-events+");
2437 if (target_supports_non_stop ())
2438 strcat (own_buf
, ";QNonStop+");
2440 if (target_supports_disable_randomization ())
2441 strcat (own_buf
, ";QDisableRandomization+");
2443 strcat (own_buf
, ";qXfer:threads:read+");
2445 if (target_supports_tracepoints ())
2447 strcat (own_buf
, ";ConditionalTracepoints+");
2448 strcat (own_buf
, ";TraceStateVariables+");
2449 strcat (own_buf
, ";TracepointSource+");
2450 strcat (own_buf
, ";DisconnectedTracing+");
2451 if (gdb_supports_qRelocInsn
&& target_supports_fast_tracepoints ())
2452 strcat (own_buf
, ";FastTracepoints+");
2453 strcat (own_buf
, ";StaticTracepoints+");
2454 strcat (own_buf
, ";InstallInTrace+");
2455 strcat (own_buf
, ";qXfer:statictrace:read+");
2456 strcat (own_buf
, ";qXfer:traceframe-info:read+");
2457 strcat (own_buf
, ";EnableDisableTracepoints+");
2458 strcat (own_buf
, ";QTBuffer:size+");
2459 strcat (own_buf
, ";tracenz+");
2462 if (target_supports_hardware_single_step ()
2463 || target_supports_software_single_step () )
2465 strcat (own_buf
, ";ConditionalBreakpoints+");
2467 strcat (own_buf
, ";BreakpointCommands+");
2469 if (target_supports_agent ())
2470 strcat (own_buf
, ";QAgent+");
2472 supported_btrace_packets (own_buf
);
2474 if (target_supports_stopped_by_sw_breakpoint ())
2475 strcat (own_buf
, ";swbreak+");
2477 if (target_supports_stopped_by_hw_breakpoint ())
2478 strcat (own_buf
, ";hwbreak+");
2480 if (the_target
->pid_to_exec_file
!= NULL
)
2481 strcat (own_buf
, ";qXfer:exec-file:read+");
2483 strcat (own_buf
, ";vContSupported+");
2485 strcat (own_buf
, ";QThreadEvents+");
2487 strcat (own_buf
, ";no-resumed+");
2489 /* Reinitialize components as needed for the new connection. */
2490 hostio_handle_new_gdb_connection ();
2491 target_handle_new_gdb_connection ();
2496 /* Thread-local storage support. */
2497 if (the_target
->get_tls_address
!= NULL
2498 && startswith (own_buf
, "qGetTLSAddr:"))
2500 char *p
= own_buf
+ 12;
2501 CORE_ADDR parts
[2], address
= 0;
2503 ptid_t ptid
= null_ptid
;
2505 require_running_or_return (own_buf
);
2507 for (i
= 0; i
< 3; i
++)
2515 p2
= strchr (p
, ',');
2528 ptid
= read_ptid (p
, NULL
);
2530 decode_address (&parts
[i
- 1], p
, len
);
2534 if (p
!= NULL
|| i
< 3)
2538 struct thread_info
*thread
= find_thread_ptid (ptid
);
2543 err
= the_target
->get_tls_address (thread
, parts
[0], parts
[1],
2549 strcpy (own_buf
, paddress(address
));
2554 write_enn (own_buf
);
2558 /* Otherwise, pretend we do not understand this packet. */
2561 /* Windows OS Thread Information Block address support. */
2562 if (the_target
->get_tib_address
!= NULL
2563 && startswith (own_buf
, "qGetTIBAddr:"))
2568 ptid_t ptid
= read_ptid (own_buf
+ 12, &annex
);
2570 n
= (*the_target
->get_tib_address
) (ptid
, &tlb
);
2573 strcpy (own_buf
, paddress(tlb
));
2578 write_enn (own_buf
);
2584 /* Handle "monitor" commands. */
2585 if (startswith (own_buf
, "qRcmd,"))
2587 char *mon
= (char *) malloc (PBUFSIZ
);
2588 int len
= strlen (own_buf
+ 6);
2592 write_enn (own_buf
);
2597 || hex2bin (own_buf
+ 6, (gdb_byte
*) mon
, len
/ 2) != len
/ 2)
2599 write_enn (own_buf
);
2603 mon
[len
/ 2] = '\0';
2607 if (the_target
->handle_monitor_command
== NULL
2608 || (*the_target
->handle_monitor_command
) (mon
) == 0)
2609 /* Default processing. */
2610 handle_monitor_command (mon
, own_buf
);
2616 if (startswith (own_buf
, "qSearch:memory:"))
2618 require_running_or_return (own_buf
);
2619 handle_search_memory (own_buf
, packet_len
);
2623 if (strcmp (own_buf
, "qAttached") == 0
2624 || startswith (own_buf
, "qAttached:"))
2626 struct process_info
*process
;
2628 if (own_buf
[sizeof ("qAttached") - 1])
2630 int pid
= strtoul (own_buf
+ sizeof ("qAttached:") - 1, NULL
, 16);
2631 process
= find_process_pid (pid
);
2635 require_running_or_return (own_buf
);
2636 process
= current_process ();
2639 if (process
== NULL
)
2641 write_enn (own_buf
);
2645 strcpy (own_buf
, process
->attached
? "1" : "0");
2649 if (startswith (own_buf
, "qCRC:"))
2651 /* CRC check (compare-section). */
2655 unsigned long long crc
;
2657 require_running_or_return (own_buf
);
2658 comma
= unpack_varlen_hex (own_buf
+ 5, &base
);
2659 if (*comma
++ != ',')
2661 write_enn (own_buf
);
2664 len
= strtoul (comma
, NULL
, 16);
2665 crc
= crc32 (base
, len
, 0xffffffff);
2666 /* Check for memory failure. */
2667 if (crc
== (unsigned long long) -1)
2669 write_enn (own_buf
);
2672 sprintf (own_buf
, "C%lx", (unsigned long) crc
);
2676 if (handle_qxfer (own_buf
, packet_len
, new_packet_len_p
))
2679 if (target_supports_tracepoints () && handle_tracepoint_query (own_buf
))
2682 /* Otherwise we didn't know what packet it was. Say we didn't
2687 static void gdb_wants_all_threads_stopped (void);
2688 static void resume (struct thread_resume
*actions
, size_t n
);
2690 /* The callback that is passed to visit_actioned_threads. */
2691 typedef int (visit_actioned_threads_callback_ftype
)
2692 (const struct thread_resume
*, struct thread_info
*);
2694 /* Call CALLBACK for any thread to which ACTIONS applies to. Returns
2695 true if CALLBACK returns true. Returns false if no matching thread
2696 is found or CALLBACK results false.
2697 Note: This function is itself a callback for find_thread. */
2700 visit_actioned_threads (thread_info
*thread
,
2701 const struct thread_resume
*actions
,
2703 visit_actioned_threads_callback_ftype
*callback
)
2705 for (size_t i
= 0; i
< num_actions
; i
++)
2707 const struct thread_resume
*action
= &actions
[i
];
2709 if (action
->thread
== minus_one_ptid
2710 || action
->thread
== thread
->id
2711 || ((action
->thread
.pid ()
2712 == thread
->id
.pid ())
2713 && action
->thread
.lwp () == -1))
2715 if ((*callback
) (action
, thread
))
2723 /* Callback for visit_actioned_threads. If the thread has a pending
2724 status to report, report it now. */
2727 handle_pending_status (const struct thread_resume
*resumption
,
2728 struct thread_info
*thread
)
2730 client_state
&cs
= get_client_state ();
2731 if (thread
->status_pending_p
)
2733 thread
->status_pending_p
= 0;
2735 cs
.last_status
= thread
->last_status
;
2736 cs
.last_ptid
= thread
->id
;
2737 prepare_resume_reply (cs
.own_buf
, cs
.last_ptid
, &cs
.last_status
);
2743 /* Parse vCont packets. */
2745 handle_v_cont (char *own_buf
)
2749 struct thread_resume
*resume_info
;
2750 struct thread_resume default_action
{ null_ptid
};
2752 /* Count the number of semicolons in the packet. There should be one
2753 for every action. */
2759 p
= strchr (p
, ';');
2762 resume_info
= (struct thread_resume
*) malloc (n
* sizeof (resume_info
[0]));
2763 if (resume_info
== NULL
)
2771 memset (&resume_info
[i
], 0, sizeof resume_info
[i
]);
2773 if (p
[0] == 's' || p
[0] == 'S')
2774 resume_info
[i
].kind
= resume_step
;
2775 else if (p
[0] == 'r')
2776 resume_info
[i
].kind
= resume_step
;
2777 else if (p
[0] == 'c' || p
[0] == 'C')
2778 resume_info
[i
].kind
= resume_continue
;
2779 else if (p
[0] == 't')
2780 resume_info
[i
].kind
= resume_stop
;
2784 if (p
[0] == 'S' || p
[0] == 'C')
2787 int sig
= strtol (p
+ 1, &q
, 16);
2792 if (!gdb_signal_to_host_p ((enum gdb_signal
) sig
))
2794 resume_info
[i
].sig
= gdb_signal_to_host ((enum gdb_signal
) sig
);
2796 else if (p
[0] == 'r')
2800 p
= unpack_varlen_hex (p
+ 1, &addr
);
2801 resume_info
[i
].step_range_start
= addr
;
2806 p
= unpack_varlen_hex (p
+ 1, &addr
);
2807 resume_info
[i
].step_range_end
= addr
;
2816 resume_info
[i
].thread
= minus_one_ptid
;
2817 default_action
= resume_info
[i
];
2819 /* Note: we don't increment i here, we'll overwrite this entry
2820 the next time through. */
2822 else if (p
[0] == ':')
2825 ptid_t ptid
= read_ptid (p
+ 1, &q
);
2830 if (p
[0] != ';' && p
[0] != 0)
2833 resume_info
[i
].thread
= ptid
;
2840 resume_info
[i
] = default_action
;
2842 resume (resume_info
, n
);
2847 write_enn (own_buf
);
2852 /* Resume target with ACTIONS, an array of NUM_ACTIONS elements. */
2855 resume (struct thread_resume
*actions
, size_t num_actions
)
2857 client_state
&cs
= get_client_state ();
2860 /* Check if among the threads that GDB wants actioned, there's
2861 one with a pending status to report. If so, skip actually
2862 resuming/stopping and report the pending event
2865 thread_info
*thread_with_status
= find_thread ([&] (thread_info
*thread
)
2867 return visit_actioned_threads (thread
, actions
, num_actions
,
2868 handle_pending_status
);
2871 if (thread_with_status
!= NULL
)
2877 (*the_target
->resume
) (actions
, num_actions
);
2880 write_ok (cs
.own_buf
);
2883 cs
.last_ptid
= mywait (minus_one_ptid
, &cs
.last_status
, 0, 1);
2885 if (cs
.last_status
.kind
== TARGET_WAITKIND_NO_RESUMED
2886 && !report_no_resumed
)
2888 /* The client does not support this stop reply. At least
2890 sprintf (cs
.own_buf
, "E.No unwaited-for children left.");
2891 disable_async_io ();
2895 if (cs
.last_status
.kind
!= TARGET_WAITKIND_EXITED
2896 && cs
.last_status
.kind
!= TARGET_WAITKIND_SIGNALLED
2897 && cs
.last_status
.kind
!= TARGET_WAITKIND_NO_RESUMED
)
2898 current_thread
->last_status
= cs
.last_status
;
2900 /* From the client's perspective, all-stop mode always stops all
2901 threads implicitly (and the target backend has already done
2902 so by now). Tag all threads as "want-stopped", so we don't
2903 resume them implicitly without the client telling us to. */
2904 gdb_wants_all_threads_stopped ();
2905 prepare_resume_reply (cs
.own_buf
, cs
.last_ptid
, &cs
.last_status
);
2906 disable_async_io ();
2908 if (cs
.last_status
.kind
== TARGET_WAITKIND_EXITED
2909 || cs
.last_status
.kind
== TARGET_WAITKIND_SIGNALLED
)
2910 target_mourn_inferior (cs
.last_ptid
);
2914 /* Attach to a new program. Return 1 if successful, 0 if failure. */
2916 handle_v_attach (char *own_buf
)
2918 client_state
&cs
= get_client_state ();
2921 pid
= strtol (own_buf
+ 8, NULL
, 16);
2922 if (pid
!= 0 && attach_inferior (pid
) == 0)
2924 /* Don't report shared library events after attaching, even if
2925 some libraries are preloaded. GDB will always poll the
2926 library list. Avoids the "stopped by shared library event"
2927 notice on the GDB side. */
2932 /* In non-stop, we don't send a resume reply. Stop events
2933 will follow up using the normal notification
2938 prepare_resume_reply (own_buf
, cs
.last_ptid
, &cs
.last_status
);
2944 write_enn (own_buf
);
2949 /* Run a new program. Return 1 if successful, 0 if failure. */
2951 handle_v_run (char *own_buf
)
2953 client_state
&cs
= get_client_state ();
2955 std::vector
<char *> new_argv
;
2956 char *new_program_name
= NULL
;
2960 for (p
= own_buf
+ strlen ("vRun;"); p
&& *p
; p
= strchr (p
, ';'))
2966 for (i
= 0, p
= own_buf
+ strlen ("vRun;"); *p
; p
= next_p
, ++i
)
2968 next_p
= strchr (p
, ';');
2970 next_p
= p
+ strlen (p
);
2972 if (i
== 0 && p
== next_p
)
2974 /* No program specified. */
2975 new_program_name
= NULL
;
2977 else if (p
== next_p
)
2979 /* Empty argument. */
2980 new_argv
.push_back (xstrdup ("''"));
2984 size_t len
= (next_p
- p
) / 2;
2985 /* ARG is the unquoted argument received via the RSP. */
2986 char *arg
= (char *) xmalloc (len
+ 1);
2987 /* FULL_ARGS will contain the quoted version of ARG. */
2988 char *full_arg
= (char *) xmalloc ((len
+ 1) * 2);
2989 /* These are pointers used to navigate the strings above. */
2990 char *tmp_arg
= arg
;
2991 char *tmp_full_arg
= full_arg
;
2994 hex2bin (p
, (gdb_byte
*) arg
, len
);
2997 while (*tmp_arg
!= '\0')
3003 *tmp_full_arg
= '\'';
3009 /* Quote single quote. */
3010 *tmp_full_arg
= '\\';
3018 *tmp_full_arg
= *tmp_arg
;
3024 *tmp_full_arg
++ = '\'';
3026 /* Finish FULL_ARG and push it into the vector containing
3028 *tmp_full_arg
= '\0';
3030 new_program_name
= full_arg
;
3032 new_argv
.push_back (full_arg
);
3038 new_argv
.push_back (NULL
);
3040 if (new_program_name
== NULL
)
3042 /* GDB didn't specify a program to run. Use the program from the
3043 last run with the new argument list. */
3044 if (program_path
.get () == NULL
)
3046 write_enn (own_buf
);
3047 free_vector_argv (new_argv
);
3052 program_path
.set (gdb::unique_xmalloc_ptr
<char> (new_program_name
));
3054 /* Free the old argv and install the new one. */
3055 free_vector_argv (program_args
);
3056 program_args
= new_argv
;
3058 create_inferior (program_path
.get (), program_args
);
3060 if (cs
.last_status
.kind
== TARGET_WAITKIND_STOPPED
)
3062 prepare_resume_reply (own_buf
, cs
.last_ptid
, &cs
.last_status
);
3064 /* In non-stop, sending a resume reply doesn't set the general
3065 thread, but GDB assumes a vRun sets it (this is so GDB can
3066 query which is the main thread of the new inferior. */
3068 cs
.general_thread
= cs
.last_ptid
;
3074 write_enn (own_buf
);
3079 /* Kill process. Return 1 if successful, 0 if failure. */
3081 handle_v_kill (char *own_buf
)
3083 client_state
&cs
= get_client_state ();
3085 char *p
= &own_buf
[6];
3086 if (cs
.multi_process
)
3087 pid
= strtol (p
, NULL
, 16);
3091 process_info
*proc
= find_process_pid (pid
);
3093 if (proc
!= nullptr && kill_inferior (proc
) == 0)
3095 cs
.last_status
.kind
= TARGET_WAITKIND_SIGNALLED
;
3096 cs
.last_status
.value
.sig
= GDB_SIGNAL_KILL
;
3097 cs
.last_ptid
= ptid_t (pid
);
3098 discard_queued_stop_replies (cs
.last_ptid
);
3104 write_enn (own_buf
);
3109 /* Handle all of the extended 'v' packets. */
3111 handle_v_requests (char *own_buf
, int packet_len
, int *new_packet_len
)
3113 client_state
&cs
= get_client_state ();
3114 if (!disable_packet_vCont
)
3116 if (strcmp (own_buf
, "vCtrlC") == 0)
3118 (*the_target
->request_interrupt
) ();
3123 if (startswith (own_buf
, "vCont;"))
3125 handle_v_cont (own_buf
);
3129 if (startswith (own_buf
, "vCont?"))
3131 strcpy (own_buf
, "vCont;c;C;t");
3133 if (target_supports_hardware_single_step ()
3134 || target_supports_software_single_step ()
3135 || !cs
.vCont_supported
)
3137 /* If target supports single step either by hardware or by
3138 software, add actions s and S to the list of supported
3139 actions. On the other hand, if GDB doesn't request the
3140 supported vCont actions in qSupported packet, add s and
3141 S to the list too. */
3142 own_buf
= own_buf
+ strlen (own_buf
);
3143 strcpy (own_buf
, ";s;S");
3146 if (target_supports_range_stepping ())
3148 own_buf
= own_buf
+ strlen (own_buf
);
3149 strcpy (own_buf
, ";r");
3155 if (startswith (own_buf
, "vFile:")
3156 && handle_vFile (own_buf
, packet_len
, new_packet_len
))
3159 if (startswith (own_buf
, "vAttach;"))
3161 if ((!extended_protocol
|| !cs
.multi_process
) && target_running ())
3163 fprintf (stderr
, "Already debugging a process\n");
3164 write_enn (own_buf
);
3167 handle_v_attach (own_buf
);
3171 if (startswith (own_buf
, "vRun;"))
3173 if ((!extended_protocol
|| !cs
.multi_process
) && target_running ())
3175 fprintf (stderr
, "Already debugging a process\n");
3176 write_enn (own_buf
);
3179 handle_v_run (own_buf
);
3183 if (startswith (own_buf
, "vKill;"))
3185 if (!target_running ())
3187 fprintf (stderr
, "No process to kill\n");
3188 write_enn (own_buf
);
3191 handle_v_kill (own_buf
);
3195 if (handle_notif_ack (own_buf
, packet_len
))
3198 /* Otherwise we didn't know what packet it was. Say we didn't
3204 /* Resume thread and wait for another event. In non-stop mode,
3205 don't really wait here, but return immediatelly to the event
3208 myresume (char *own_buf
, int step
, int sig
)
3210 client_state
&cs
= get_client_state ();
3211 struct thread_resume resume_info
[2];
3213 int valid_cont_thread
;
3215 valid_cont_thread
= (cs
.cont_thread
!= null_ptid
3216 && cs
.cont_thread
!= minus_one_ptid
);
3218 if (step
|| sig
|| valid_cont_thread
)
3220 resume_info
[0].thread
= current_ptid
;
3222 resume_info
[0].kind
= resume_step
;
3224 resume_info
[0].kind
= resume_continue
;
3225 resume_info
[0].sig
= sig
;
3229 if (!valid_cont_thread
)
3231 resume_info
[n
].thread
= minus_one_ptid
;
3232 resume_info
[n
].kind
= resume_continue
;
3233 resume_info
[n
].sig
= 0;
3237 resume (resume_info
, n
);
3240 /* Callback for for_each_thread. Make a new stop reply for each
3244 queue_stop_reply_callback (thread_info
*thread
)
3246 /* For now, assume targets that don't have this callback also don't
3247 manage the thread's last_status field. */
3248 if (the_target
->thread_stopped
== NULL
)
3250 struct vstop_notif
*new_notif
= XNEW (struct vstop_notif
);
3252 new_notif
->ptid
= thread
->id
;
3253 new_notif
->status
= thread
->last_status
;
3254 /* Pass the last stop reply back to GDB, but don't notify
3256 notif_event_enque (¬if_stop
,
3257 (struct notif_event
*) new_notif
);
3261 if (thread_stopped (thread
))
3265 std::string status_string
3266 = target_waitstatus_to_string (&thread
->last_status
);
3268 debug_printf ("Reporting thread %s as already stopped with %s\n",
3269 target_pid_to_str (thread
->id
),
3270 status_string
.c_str ());
3273 gdb_assert (thread
->last_status
.kind
!= TARGET_WAITKIND_IGNORE
);
3275 /* Pass the last stop reply back to GDB, but don't notify
3277 queue_stop_reply (thread
->id
, &thread
->last_status
);
3282 /* Set this inferior threads's state as "want-stopped". We won't
3283 resume this thread until the client gives us another action for
3287 gdb_wants_thread_stopped (thread_info
*thread
)
3289 thread
->last_resume_kind
= resume_stop
;
3291 if (thread
->last_status
.kind
== TARGET_WAITKIND_IGNORE
)
3293 /* Most threads are stopped implicitly (all-stop); tag that with
3295 thread
->last_status
.kind
= TARGET_WAITKIND_STOPPED
;
3296 thread
->last_status
.value
.sig
= GDB_SIGNAL_0
;
3300 /* Set all threads' states as "want-stopped". */
3303 gdb_wants_all_threads_stopped (void)
3305 for_each_thread (gdb_wants_thread_stopped
);
3308 /* Callback for for_each_thread. If the thread is stopped with an
3309 interesting event, mark it as having a pending event. */
3312 set_pending_status_callback (thread_info
*thread
)
3314 if (thread
->last_status
.kind
!= TARGET_WAITKIND_STOPPED
3315 || (thread
->last_status
.value
.sig
!= GDB_SIGNAL_0
3316 /* A breakpoint, watchpoint or finished step from a previous
3317 GDB run isn't considered interesting for a new GDB run.
3318 If we left those pending, the new GDB could consider them
3319 random SIGTRAPs. This leaves out real async traps. We'd
3320 have to peek into the (target-specific) siginfo to
3321 distinguish those. */
3322 && thread
->last_status
.value
.sig
!= GDB_SIGNAL_TRAP
))
3323 thread
->status_pending_p
= 1;
3326 /* Status handler for the '?' packet. */
3329 handle_status (char *own_buf
)
3331 client_state
&cs
= get_client_state ();
3333 /* GDB is connected, don't forward events to the target anymore. */
3334 for_each_process ([] (process_info
*process
) {
3335 process
->gdb_detached
= 0;
3338 /* In non-stop mode, we must send a stop reply for each stopped
3339 thread. In all-stop mode, just send one for the first stopped
3344 for_each_thread (queue_stop_reply_callback
);
3346 /* The first is sent immediatly. OK is sent if there is no
3347 stopped thread, which is the same handling of the vStopped
3348 packet (by design). */
3349 notif_write_event (¬if_stop
, cs
.own_buf
);
3353 thread_info
*thread
= NULL
;
3356 stabilize_threads ();
3357 gdb_wants_all_threads_stopped ();
3359 /* We can only report one status, but we might be coming out of
3360 non-stop -- if more than one thread is stopped with
3361 interesting events, leave events for the threads we're not
3362 reporting now pending. They'll be reported the next time the
3363 threads are resumed. Start by marking all interesting events
3365 for_each_thread (set_pending_status_callback
);
3367 /* Prefer the last thread that reported an event to GDB (even if
3368 that was a GDB_SIGNAL_TRAP). */
3369 if (cs
.last_status
.kind
!= TARGET_WAITKIND_IGNORE
3370 && cs
.last_status
.kind
!= TARGET_WAITKIND_EXITED
3371 && cs
.last_status
.kind
!= TARGET_WAITKIND_SIGNALLED
)
3372 thread
= find_thread_ptid (cs
.last_ptid
);
3374 /* If the last event thread is not found for some reason, look
3375 for some other thread that might have an event to report. */
3377 thread
= find_thread ([] (thread_info
*thr_arg
)
3379 return thr_arg
->status_pending_p
;
3382 /* If we're still out of luck, simply pick the first thread in
3385 thread
= get_first_thread ();
3389 struct thread_info
*tp
= (struct thread_info
*) thread
;
3391 /* We're reporting this event, so it's no longer
3393 tp
->status_pending_p
= 0;
3395 /* GDB assumes the current thread is the thread we're
3396 reporting the status for. */
3397 cs
.general_thread
= thread
->id
;
3398 set_desired_thread ();
3400 gdb_assert (tp
->last_status
.kind
!= TARGET_WAITKIND_IGNORE
);
3401 prepare_resume_reply (own_buf
, tp
->id
, &tp
->last_status
);
3404 strcpy (own_buf
, "W00");
3409 gdbserver_version (void)
3411 printf ("GNU gdbserver %s%s\n"
3412 "Copyright (C) 2019 Free Software Foundation, Inc.\n"
3413 "gdbserver is free software, covered by the "
3414 "GNU General Public License.\n"
3415 "This gdbserver was configured as \"%s\"\n",
3416 PKGVERSION
, version
, host_name
);
3420 gdbserver_usage (FILE *stream
)
3422 fprintf (stream
, "Usage:\tgdbserver [OPTIONS] COMM PROG [ARGS ...]\n"
3423 "\tgdbserver [OPTIONS] --attach COMM PID\n"
3424 "\tgdbserver [OPTIONS] --multi COMM\n"
3426 "COMM may either be a tty device (for serial debugging),\n"
3427 "HOST:PORT to listen for a TCP connection, or '-' or 'stdio' to use \n"
3428 "stdin/stdout of gdbserver.\n"
3429 "PROG is the executable program. ARGS are arguments passed to inferior.\n"
3430 "PID is the process ID to attach to, when --attach is specified.\n"
3432 "Operating modes:\n"
3434 " --attach Attach to running process PID.\n"
3435 " --multi Start server without a specific program, and\n"
3436 " only quit when explicitly commanded.\n"
3437 " --once Exit after the first connection has closed.\n"
3438 " --help Print this message and then exit.\n"
3439 " --version Display version information and exit.\n"
3443 " --wrapper WRAPPER -- Run WRAPPER to start new programs.\n"
3444 " --disable-randomization\n"
3445 " Run PROG with address space randomization disabled.\n"
3446 " --no-disable-randomization\n"
3447 " Don't disable address space randomization when\n"
3449 " --startup-with-shell\n"
3450 " Start PROG using a shell. I.e., execs a shell that\n"
3451 " then execs PROG. (default)\n"
3452 " --no-startup-with-shell\n"
3453 " Exec PROG directly instead of using a shell.\n"
3454 " Disables argument globbing and variable substitution\n"
3455 " on UNIX-like systems.\n"
3459 " --debug Enable general debugging output.\n"
3460 " --debug-format=opt1[,opt2,...]\n"
3461 " Specify extra content in debugging output.\n"
3466 " --remote-debug Enable remote protocol debugging output.\n"
3467 " --disable-packet=opt1[,opt2,...]\n"
3468 " Disable support for RSP packets or features.\n"
3470 " vCont, Tthread, qC, qfThreadInfo and \n"
3471 " threads (disable all threading packets).\n"
3473 "For more information, consult the GDB manual (available as on-line \n"
3474 "info or a printed manual).\n");
3475 if (REPORT_BUGS_TO
[0] && stream
== stdout
)
3476 fprintf (stream
, "Report bugs to \"%s\".\n", REPORT_BUGS_TO
);
3480 gdbserver_show_disableable (FILE *stream
)
3482 fprintf (stream
, "Disableable packets:\n"
3483 " vCont \tAll vCont packets\n"
3484 " qC \tQuerying the current thread\n"
3485 " qfThreadInfo\tThread listing\n"
3486 " Tthread \tPassing the thread specifier in the "
3487 "T stop reply packet\n"
3488 " threads \tAll of the above\n");
3492 kill_inferior_callback (process_info
*process
)
3494 kill_inferior (process
);
3495 discard_queued_stop_replies (ptid_t (process
->pid
));
3498 /* Call this when exiting gdbserver with possible inferiors that need
3499 to be killed or detached from. */
3502 detach_or_kill_for_exit (void)
3504 /* First print a list of the inferiors we will be killing/detaching.
3505 This is to assist the user, for example, in case the inferior unexpectedly
3506 dies after we exit: did we screw up or did the inferior exit on its own?
3507 Having this info will save some head-scratching. */
3509 if (have_started_inferiors_p ())
3511 fprintf (stderr
, "Killing process(es):");
3513 for_each_process ([] (process_info
*process
) {
3514 if (!process
->attached
)
3515 fprintf (stderr
, " %d", process
->pid
);
3518 fprintf (stderr
, "\n");
3520 if (have_attached_inferiors_p ())
3522 fprintf (stderr
, "Detaching process(es):");
3524 for_each_process ([] (process_info
*process
) {
3525 if (process
->attached
)
3526 fprintf (stderr
, " %d", process
->pid
);
3529 fprintf (stderr
, "\n");
3532 /* Now we can kill or detach the inferiors. */
3533 for_each_process ([] (process_info
*process
) {
3534 int pid
= process
->pid
;
3536 if (process
->attached
)
3537 detach_inferior (process
);
3539 kill_inferior (process
);
3541 discard_queued_stop_replies (ptid_t (pid
));
3545 /* Value that will be passed to exit(3) when gdbserver exits. */
3546 static int exit_code
;
3548 /* Cleanup version of detach_or_kill_for_exit. */
3551 detach_or_kill_for_exit_cleanup (void *ignore
)
3556 detach_or_kill_for_exit ();
3559 CATCH (exception
, RETURN_MASK_ALL
)
3562 fprintf (stderr
, "Detach or kill failed: %s\n", exception
.message
);
3568 /* Main function. This is called by the real "main" function,
3569 wrapped in a TRY_CATCH that handles any uncaught exceptions. */
3571 static void ATTRIBUTE_NORETURN
3572 captured_main (int argc
, char *argv
[])
3577 const char *port
= NULL
;
3578 char **next_arg
= &argv
[1];
3579 volatile int multi_mode
= 0;
3580 volatile int attach
= 0;
3582 bool selftest
= false;
3584 const char *selftest_filter
= NULL
;
3587 current_directory
= getcwd (NULL
, 0);
3588 client_state
&cs
= get_client_state ();
3590 if (current_directory
== NULL
)
3592 error (_("Could not find current working directory: %s"),
3593 safe_strerror (errno
));
3596 while (*next_arg
!= NULL
&& **next_arg
== '-')
3598 if (strcmp (*next_arg
, "--version") == 0)
3600 gdbserver_version ();
3603 else if (strcmp (*next_arg
, "--help") == 0)
3605 gdbserver_usage (stdout
);
3608 else if (strcmp (*next_arg
, "--attach") == 0)
3610 else if (strcmp (*next_arg
, "--multi") == 0)
3612 else if (strcmp (*next_arg
, "--wrapper") == 0)
3619 while (*next_arg
!= NULL
&& strcmp (*next_arg
, "--") != 0)
3621 wrapper_argv
+= *next_arg
;
3622 wrapper_argv
+= ' ';
3626 if (!wrapper_argv
.empty ())
3628 /* Erase the last whitespace. */
3629 wrapper_argv
.erase (wrapper_argv
.end () - 1);
3632 if (next_arg
== tmp
|| *next_arg
== NULL
)
3634 gdbserver_usage (stderr
);
3638 /* Consume the "--". */
3641 else if (strcmp (*next_arg
, "--debug") == 0)
3643 else if (startswith (*next_arg
, "--debug-format="))
3645 std::string error_msg
3646 = parse_debug_format_options ((*next_arg
)
3647 + sizeof ("--debug-format=") - 1, 0);
3649 if (!error_msg
.empty ())
3651 fprintf (stderr
, "%s", error_msg
.c_str ());
3655 else if (strcmp (*next_arg
, "--remote-debug") == 0)
3657 else if (strcmp (*next_arg
, "--disable-packet") == 0)
3659 gdbserver_show_disableable (stdout
);
3662 else if (startswith (*next_arg
, "--disable-packet="))
3664 char *packets
, *tok
;
3666 packets
= *next_arg
+= sizeof ("--disable-packet=") - 1;
3667 for (tok
= strtok (packets
, ",");
3669 tok
= strtok (NULL
, ","))
3671 if (strcmp ("vCont", tok
) == 0)
3672 disable_packet_vCont
= 1;
3673 else if (strcmp ("Tthread", tok
) == 0)
3674 disable_packet_Tthread
= 1;
3675 else if (strcmp ("qC", tok
) == 0)
3676 disable_packet_qC
= 1;
3677 else if (strcmp ("qfThreadInfo", tok
) == 0)
3678 disable_packet_qfThreadInfo
= 1;
3679 else if (strcmp ("threads", tok
) == 0)
3681 disable_packet_vCont
= 1;
3682 disable_packet_Tthread
= 1;
3683 disable_packet_qC
= 1;
3684 disable_packet_qfThreadInfo
= 1;
3688 fprintf (stderr
, "Don't know how to disable \"%s\".\n\n",
3690 gdbserver_show_disableable (stderr
);
3695 else if (strcmp (*next_arg
, "-") == 0)
3697 /* "-" specifies a stdio connection and is a form of port
3699 port
= STDIO_CONNECTION_NAME
;
3703 else if (strcmp (*next_arg
, "--disable-randomization") == 0)
3704 cs
.disable_randomization
= 1;
3705 else if (strcmp (*next_arg
, "--no-disable-randomization") == 0)
3706 cs
.disable_randomization
= 0;
3707 else if (strcmp (*next_arg
, "--startup-with-shell") == 0)
3708 startup_with_shell
= true;
3709 else if (strcmp (*next_arg
, "--no-startup-with-shell") == 0)
3710 startup_with_shell
= false;
3711 else if (strcmp (*next_arg
, "--once") == 0)
3713 else if (strcmp (*next_arg
, "--selftest") == 0)
3715 else if (startswith (*next_arg
, "--selftest="))
3719 selftest_filter
= *next_arg
+ strlen ("--selftest=");
3724 fprintf (stderr
, "Unknown argument: %s\n", *next_arg
);
3737 if ((port
== NULL
|| (!attach
&& !multi_mode
&& *next_arg
== NULL
))
3740 gdbserver_usage (stderr
);
3744 /* Remember stdio descriptors. LISTEN_DESC must not be listed, it will be
3745 opened by remote_prepare. */
3748 save_original_signals_state (false);
3750 /* We need to know whether the remote connection is stdio before
3751 starting the inferior. Inferiors created in this scenario have
3752 stdin,stdout redirected. So do this here before we call
3755 remote_prepare (port
);
3760 /* --attach used to come after PORT, so allow it there for
3762 if (*next_arg
!= NULL
&& strcmp (*next_arg
, "--attach") == 0)
3769 && (*next_arg
== NULL
3770 || (*next_arg
)[0] == '\0'
3771 || (pid
= strtoul (*next_arg
, &arg_end
, 0)) == 0
3773 || next_arg
[1] != NULL
))
3778 gdbserver_usage (stderr
);
3782 /* Gather information about the environment. */
3783 our_environ
= gdb_environ::from_host_environ ();
3785 initialize_async_io ();
3787 have_job_control ();
3788 initialize_event_loop ();
3789 if (target_supports_tracepoints ())
3790 initialize_tracepoint ();
3791 initialize_notif ();
3793 mem_buf
= (unsigned char *) xmalloc (PBUFSIZ
);
3798 selftests::run_tests (selftest_filter
);
3800 printf (_("Selftests have been disabled for this build.\n"));
3802 throw_quit ("Quit");
3805 if (pid
== 0 && *next_arg
!= NULL
)
3809 n
= argc
- (next_arg
- argv
);
3810 program_path
.set (gdb::unique_xmalloc_ptr
<char> (xstrdup (next_arg
[0])));
3811 for (i
= 1; i
< n
; i
++)
3812 program_args
.push_back (xstrdup (next_arg
[i
]));
3813 program_args
.push_back (NULL
);
3815 /* Wait till we are at first instruction in program. */
3816 create_inferior (program_path
.get (), program_args
);
3818 /* We are now (hopefully) stopped at the first instruction of
3819 the target process. This assumes that the target process was
3820 successfully created. */
3824 if (attach_inferior (pid
) == -1)
3825 error ("Attaching not supported on this target");
3827 /* Otherwise succeeded. */
3831 cs
.last_status
.kind
= TARGET_WAITKIND_EXITED
;
3832 cs
.last_status
.value
.integer
= 0;
3833 cs
.last_ptid
= minus_one_ptid
;
3835 make_cleanup (detach_or_kill_for_exit_cleanup
, NULL
);
3837 /* Don't report shared library events on the initial connection,
3838 even if some libraries are preloaded. Avoids the "stopped by
3839 shared library event" notice on gdb side. */
3842 if (cs
.last_status
.kind
== TARGET_WAITKIND_EXITED
3843 || cs
.last_status
.kind
== TARGET_WAITKIND_SIGNALLED
)
3848 if (!was_running
&& !multi_mode
)
3849 error ("No program to debug");
3854 cs
.multi_process
= 0;
3855 cs
.report_fork_events
= 0;
3856 cs
.report_vfork_events
= 0;
3857 cs
.report_exec_events
= 0;
3858 /* Be sure we're out of tfind mode. */
3859 cs
.current_traceframe
= -1;
3860 cs
.cont_thread
= null_ptid
;
3861 cs
.swbreak_feature
= 0;
3862 cs
.hwbreak_feature
= 0;
3863 cs
.vCont_supported
= 0;
3869 /* Wait for events. This will return when all event sources
3870 are removed from the event loop. */
3871 start_event_loop ();
3873 /* If an exit was requested (using the "monitor exit"
3874 command), terminate now. */
3876 throw_quit ("Quit");
3878 /* The only other way to get here is for getpkt to fail:
3880 - If --once was specified, we're done.
3882 - If not in extended-remote mode, and we're no longer
3883 debugging anything, simply exit: GDB has disconnected
3884 after processing the last process exit.
3886 - Otherwise, close the connection and reopen it at the
3888 if (run_once
|| (!extended_protocol
&& !target_running ()))
3889 throw_quit ("Quit");
3892 "Remote side has terminated connection. "
3893 "GDBserver will reopen the connection.\n");
3895 /* Get rid of any pending statuses. An eventual reconnection
3896 (by the same GDB instance or another) will refresh all its
3897 state from scratch. */
3898 discard_queued_stop_replies (minus_one_ptid
);
3899 for_each_thread ([] (thread_info
*thread
)
3901 thread
->status_pending_p
= 0;
3906 if (disconnected_tracing
)
3908 /* Try to enable non-stop/async mode, so we we can
3909 both wait for an async socket accept, and handle
3910 async target events simultaneously. There's also
3911 no point either in having the target always stop
3912 all threads, when we're going to pass signals
3913 down without informing GDB. */
3916 if (start_non_stop (1))
3919 /* Detaching implicitly resumes all threads;
3920 simply disconnecting does not. */
3926 "Disconnected tracing disabled; "
3927 "stopping trace run.\n");
3932 CATCH (exception
, RETURN_MASK_ERROR
)
3935 fprintf (stderr
, "gdbserver: %s\n", exception
.message
);
3937 if (response_needed
)
3939 write_enn (cs
.own_buf
);
3940 putpkt (cs
.own_buf
);
3944 throw_quit ("Quit");
3950 /* Main function. */
3953 main (int argc
, char *argv
[])
3958 captured_main (argc
, argv
);
3960 CATCH (exception
, RETURN_MASK_ALL
)
3962 if (exception
.reason
== RETURN_ERROR
)
3965 fprintf (stderr
, "%s\n", exception
.message
);
3966 fprintf (stderr
, "Exiting\n");
3974 gdb_assert_not_reached ("captured_main should never return");
3977 /* Process options coming from Z packets for a breakpoint. PACKET is
3978 the packet buffer. *PACKET is updated to point to the first char
3979 after the last processed option. */
3982 process_point_options (struct gdb_breakpoint
*bp
, const char **packet
)
3984 const char *dataptr
= *packet
;
3987 /* Check if data has the correct format. */
3988 if (*dataptr
!= ';')
3995 if (*dataptr
== ';')
3998 if (*dataptr
== 'X')
4000 /* Conditional expression. */
4002 debug_printf ("Found breakpoint condition.\n");
4003 if (!add_breakpoint_condition (bp
, &dataptr
))
4004 dataptr
= strchrnul (dataptr
, ';');
4006 else if (startswith (dataptr
, "cmds:"))
4008 dataptr
+= strlen ("cmds:");
4010 debug_printf ("Found breakpoint commands %s.\n", dataptr
);
4011 persist
= (*dataptr
== '1');
4013 if (add_breakpoint_commands (bp
, &dataptr
, persist
))
4014 dataptr
= strchrnul (dataptr
, ';');
4018 fprintf (stderr
, "Unknown token %c, ignoring.\n",
4020 /* Skip tokens until we find one that we recognize. */
4021 dataptr
= strchrnul (dataptr
, ';');
4027 /* Event loop callback that handles a serial event. The first byte in
4028 the serial buffer gets us here. We expect characters to arrive at
4029 a brisk pace, so we read the rest of the packet with a blocking
4033 process_serial_event (void)
4035 client_state
&cs
= get_client_state ();
4041 int new_packet_len
= -1;
4043 disable_async_io ();
4045 response_needed
= 0;
4046 packet_len
= getpkt (cs
.own_buf
);
4047 if (packet_len
<= 0)
4050 /* Force an event loop break. */
4053 response_needed
= 1;
4055 char ch
= cs
.own_buf
[0];
4059 handle_query (cs
.own_buf
, packet_len
, &new_packet_len
);
4062 handle_general_set (cs
.own_buf
);
4065 handle_detach (cs
.own_buf
);
4068 extended_protocol
= 1;
4069 write_ok (cs
.own_buf
);
4072 handle_status (cs
.own_buf
);
4075 if (cs
.own_buf
[1] == 'c' || cs
.own_buf
[1] == 'g' || cs
.own_buf
[1] == 's')
4077 require_running_or_break (cs
.own_buf
);
4079 ptid_t thread_id
= read_ptid (&cs
.own_buf
[2], NULL
);
4081 if (thread_id
== null_ptid
|| thread_id
== minus_one_ptid
)
4082 thread_id
= null_ptid
;
4083 else if (thread_id
.is_pid ())
4085 /* The ptid represents a pid. */
4086 thread_info
*thread
= find_any_thread_of_pid (thread_id
.pid ());
4090 write_enn (cs
.own_buf
);
4094 thread_id
= thread
->id
;
4098 /* The ptid represents a lwp/tid. */
4099 if (find_thread_ptid (thread_id
) == NULL
)
4101 write_enn (cs
.own_buf
);
4106 if (cs
.own_buf
[1] == 'g')
4108 if (thread_id
== null_ptid
)
4110 /* GDB is telling us to choose any thread. Check if
4111 the currently selected thread is still valid. If
4112 it is not, select the first available. */
4113 thread_info
*thread
= find_thread_ptid (cs
.general_thread
);
4115 thread
= get_first_thread ();
4116 thread_id
= thread
->id
;
4119 cs
.general_thread
= thread_id
;
4120 set_desired_thread ();
4121 gdb_assert (current_thread
!= NULL
);
4123 else if (cs
.own_buf
[1] == 'c')
4124 cs
.cont_thread
= thread_id
;
4126 write_ok (cs
.own_buf
);
4130 /* Silently ignore it so that gdb can extend the protocol
4131 without compatibility headaches. */
4132 cs
.own_buf
[0] = '\0';
4136 require_running_or_break (cs
.own_buf
);
4137 if (cs
.current_traceframe
>= 0)
4139 struct regcache
*regcache
4140 = new_register_cache (current_target_desc ());
4142 if (fetch_traceframe_registers (cs
.current_traceframe
,
4144 registers_to_string (regcache
, cs
.own_buf
);
4146 write_enn (cs
.own_buf
);
4147 free_register_cache (regcache
);
4151 struct regcache
*regcache
;
4153 if (!set_desired_thread ())
4154 write_enn (cs
.own_buf
);
4157 regcache
= get_thread_regcache (current_thread
, 1);
4158 registers_to_string (regcache
, cs
.own_buf
);
4163 require_running_or_break (cs
.own_buf
);
4164 if (cs
.current_traceframe
>= 0)
4165 write_enn (cs
.own_buf
);
4168 struct regcache
*regcache
;
4170 if (!set_desired_thread ())
4171 write_enn (cs
.own_buf
);
4174 regcache
= get_thread_regcache (current_thread
, 1);
4175 registers_from_string (regcache
, &cs
.own_buf
[1]);
4176 write_ok (cs
.own_buf
);
4182 require_running_or_break (cs
.own_buf
);
4183 decode_m_packet (&cs
.own_buf
[1], &mem_addr
, &len
);
4184 int res
= gdb_read_memory (mem_addr
, mem_buf
, len
);
4186 write_enn (cs
.own_buf
);
4188 bin2hex (mem_buf
, cs
.own_buf
, res
);
4192 require_running_or_break (cs
.own_buf
);
4193 decode_M_packet (&cs
.own_buf
[1], &mem_addr
, &len
, &mem_buf
);
4194 if (gdb_write_memory (mem_addr
, mem_buf
, len
) == 0)
4195 write_ok (cs
.own_buf
);
4197 write_enn (cs
.own_buf
);
4200 require_running_or_break (cs
.own_buf
);
4201 if (decode_X_packet (&cs
.own_buf
[1], packet_len
- 1,
4202 &mem_addr
, &len
, &mem_buf
) < 0
4203 || gdb_write_memory (mem_addr
, mem_buf
, len
) != 0)
4204 write_enn (cs
.own_buf
);
4206 write_ok (cs
.own_buf
);
4209 require_running_or_break (cs
.own_buf
);
4210 hex2bin (cs
.own_buf
+ 1, &sig
, 1);
4211 if (gdb_signal_to_host_p ((enum gdb_signal
) sig
))
4212 signal
= gdb_signal_to_host ((enum gdb_signal
) sig
);
4215 myresume (cs
.own_buf
, 0, signal
);
4218 require_running_or_break (cs
.own_buf
);
4219 hex2bin (cs
.own_buf
+ 1, &sig
, 1);
4220 if (gdb_signal_to_host_p ((enum gdb_signal
) sig
))
4221 signal
= gdb_signal_to_host ((enum gdb_signal
) sig
);
4224 myresume (cs
.own_buf
, 1, signal
);
4227 require_running_or_break (cs
.own_buf
);
4229 myresume (cs
.own_buf
, 0, signal
);
4232 require_running_or_break (cs
.own_buf
);
4234 myresume (cs
.own_buf
, 1, signal
);
4236 case 'Z': /* insert_ ... */
4238 case 'z': /* remove_ ... */
4243 char type
= cs
.own_buf
[1];
4245 const int insert
= ch
== 'Z';
4246 const char *p
= &cs
.own_buf
[3];
4248 p
= unpack_varlen_hex (p
, &addr
);
4249 kind
= strtol (p
+ 1, &dataptr
, 16);
4253 struct gdb_breakpoint
*bp
;
4255 bp
= set_gdb_breakpoint (type
, addr
, kind
, &res
);
4260 /* GDB may have sent us a list of *point parameters to
4261 be evaluated on the target's side. Read such list
4262 here. If we already have a list of parameters, GDB
4263 is telling us to drop that list and use this one
4265 clear_breakpoint_conditions_and_commands (bp
);
4266 const char *options
= dataptr
;
4267 process_point_options (bp
, &options
);
4271 res
= delete_gdb_breakpoint (type
, addr
, kind
);
4274 write_ok (cs
.own_buf
);
4277 cs
.own_buf
[0] = '\0';
4279 write_enn (cs
.own_buf
);
4283 response_needed
= 0;
4284 if (!target_running ())
4285 /* The packet we received doesn't make sense - but we can't
4286 reply to it, either. */
4289 fprintf (stderr
, "Killing all inferiors\n");
4291 for_each_process (kill_inferior_callback
);
4293 /* When using the extended protocol, we wait with no program
4294 running. The traditional protocol will exit instead. */
4295 if (extended_protocol
)
4297 cs
.last_status
.kind
= TARGET_WAITKIND_EXITED
;
4298 cs
.last_status
.value
.sig
= GDB_SIGNAL_KILL
;
4306 require_running_or_break (cs
.own_buf
);
4308 ptid_t thread_id
= read_ptid (&cs
.own_buf
[1], NULL
);
4309 if (find_thread_ptid (thread_id
) == NULL
)
4311 write_enn (cs
.own_buf
);
4315 if (mythread_alive (thread_id
))
4316 write_ok (cs
.own_buf
);
4318 write_enn (cs
.own_buf
);
4322 response_needed
= 0;
4324 /* Restarting the inferior is only supported in the extended
4326 if (extended_protocol
)
4328 if (target_running ())
4329 for_each_process (kill_inferior_callback
);
4331 fprintf (stderr
, "GDBserver restarting\n");
4333 /* Wait till we are at 1st instruction in prog. */
4334 if (program_path
.get () != NULL
)
4336 create_inferior (program_path
.get (), program_args
);
4338 if (cs
.last_status
.kind
== TARGET_WAITKIND_STOPPED
)
4340 /* Stopped at the first instruction of the target
4342 cs
.general_thread
= cs
.last_ptid
;
4346 /* Something went wrong. */
4347 cs
.general_thread
= null_ptid
;
4352 cs
.last_status
.kind
= TARGET_WAITKIND_EXITED
;
4353 cs
.last_status
.value
.sig
= GDB_SIGNAL_KILL
;
4359 /* It is a request we don't understand. Respond with an
4360 empty packet so that gdb knows that we don't support this
4362 cs
.own_buf
[0] = '\0';
4366 /* Extended (long) request. */
4367 handle_v_requests (cs
.own_buf
, packet_len
, &new_packet_len
);
4371 /* It is a request we don't understand. Respond with an empty
4372 packet so that gdb knows that we don't support this
4374 cs
.own_buf
[0] = '\0';
4378 if (new_packet_len
!= -1)
4379 putpkt_binary (cs
.own_buf
, new_packet_len
);
4381 putpkt (cs
.own_buf
);
4383 response_needed
= 0;
4391 /* Event-loop callback for serial events. */
4394 handle_serial_event (int err
, gdb_client_data client_data
)
4397 debug_printf ("handling possible serial event\n");
4399 /* Really handle it. */
4400 if (process_serial_event () < 0)
4403 /* Be sure to not change the selected thread behind GDB's back.
4404 Important in the non-stop mode asynchronous protocol. */
4405 set_desired_thread ();
4410 /* Push a stop notification on the notification queue. */
4413 push_stop_notification (ptid_t ptid
, struct target_waitstatus
*status
)
4415 struct vstop_notif
*vstop_notif
= XNEW (struct vstop_notif
);
4417 vstop_notif
->status
= *status
;
4418 vstop_notif
->ptid
= ptid
;
4419 /* Push Stop notification. */
4420 notif_push (¬if_stop
, (struct notif_event
*) vstop_notif
);
4423 /* Event-loop callback for target events. */
4426 handle_target_event (int err
, gdb_client_data client_data
)
4428 client_state
&cs
= get_client_state ();
4430 debug_printf ("handling possible target event\n");
4432 cs
.last_ptid
= mywait (minus_one_ptid
, &cs
.last_status
,
4435 if (cs
.last_status
.kind
== TARGET_WAITKIND_NO_RESUMED
)
4437 if (gdb_connected () && report_no_resumed
)
4438 push_stop_notification (null_ptid
, &cs
.last_status
);
4440 else if (cs
.last_status
.kind
!= TARGET_WAITKIND_IGNORE
)
4442 int pid
= cs
.last_ptid
.pid ();
4443 struct process_info
*process
= find_process_pid (pid
);
4444 int forward_event
= !gdb_connected () || process
->gdb_detached
;
4446 if (cs
.last_status
.kind
== TARGET_WAITKIND_EXITED
4447 || cs
.last_status
.kind
== TARGET_WAITKIND_SIGNALLED
)
4449 mark_breakpoints_out (process
);
4450 target_mourn_inferior (cs
.last_ptid
);
4452 else if (cs
.last_status
.kind
== TARGET_WAITKIND_THREAD_EXITED
)
4456 /* We're reporting this thread as stopped. Update its
4457 "want-stopped" state to what the client wants, until it
4458 gets a new resume action. */
4459 current_thread
->last_resume_kind
= resume_stop
;
4460 current_thread
->last_status
= cs
.last_status
;
4465 if (!target_running ())
4467 /* The last process exited. We're done. */
4471 if (cs
.last_status
.kind
== TARGET_WAITKIND_EXITED
4472 || cs
.last_status
.kind
== TARGET_WAITKIND_SIGNALLED
4473 || cs
.last_status
.kind
== TARGET_WAITKIND_THREAD_EXITED
)
4477 /* A thread stopped with a signal, but gdb isn't
4478 connected to handle it. Pass it down to the
4479 inferior, as if it wasn't being traced. */
4480 enum gdb_signal signal
;
4483 debug_printf ("GDB not connected; forwarding event %d for"
4485 (int) cs
.last_status
.kind
,
4486 target_pid_to_str (cs
.last_ptid
));
4488 if (cs
.last_status
.kind
== TARGET_WAITKIND_STOPPED
)
4489 signal
= cs
.last_status
.value
.sig
;
4491 signal
= GDB_SIGNAL_0
;
4492 target_continue (cs
.last_ptid
, signal
);
4496 push_stop_notification (cs
.last_ptid
, &cs
.last_status
);
4499 /* Be sure to not change the selected thread behind GDB's back.
4500 Important in the non-stop mode asynchronous protocol. */
4501 set_desired_thread ();
4514 } // namespace selftests
4515 #endif /* GDB_SELF_TEST */