1 /* Main code for remote server for GDB.
2 Copyright (C) 1989-2018 Free Software Foundation, Inc.
4 This file is part of GDB.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program. If not, see <http://www.gnu.org/licenses/>. */
20 #include "gdbthread.h"
25 #include "signals-state-save-restore.h"
33 #include "btrace-common.h"
34 #include "filestuff.h"
35 #include "tracepoint.h"
39 #include "common-inferior.h"
40 #include "job-control.h"
42 #include "filenames.h"
43 #include "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;
75 /* The thread set with an `Hc' packet. `Hc' is deprecated in favor of
76 `vCont'. Note the multi-process extensions made `vCont' a
77 requirement, so `Hc pPID.TID' is pretty much undefined. So
78 CONT_THREAD can be null_ptid for no `Hc' thread, minus_one_ptid for
79 resuming all threads of the process (again, `Hc' isn't used for
80 multi-process), or a specific thread ptid_t. */
83 /* The thread set with an `Hg' packet. */
84 ptid_t general_thread
;
88 static int extended_protocol
;
89 static int response_needed
;
90 static int exit_requested
;
92 /* --once: Exit after the first connection has closed. */
96 int report_fork_events
;
97 int report_vfork_events
;
98 int report_exec_events
;
99 int report_thread_events
;
101 /* Whether to report TARGET_WAITKING_NO_RESUMED events. */
102 static int report_no_resumed
;
108 /* True if the "vContSupported" feature is active. In that case, GDB
109 wants us to report whether single step is supported in the reply to
111 static int vCont_supported
;
113 /* Whether we should attempt to disable the operating system's address
114 space randomization feature before starting an inferior. */
115 int disable_randomization
= 1;
118 /* Set the PROGRAM_PATH. Here we adjust the path of the provided
120 void set (gdb::unique_xmalloc_ptr
<char> &&path
)
122 m_path
= std::move (path
);
124 /* Make sure we're using the absolute path of the inferior when
126 if (!contains_dir_separator (m_path
.get ()))
130 /* Check if the file is in our CWD. If it is, then we prefix
131 its name with CURRENT_DIRECTORY. Otherwise, we leave the
132 name as-is because we'll try searching for it in $PATH. */
133 if (is_regular_file (m_path
.get (), ®_file_errno
))
134 m_path
= gdb_abspath (m_path
.get ());
138 /* Return the PROGRAM_PATH. */
140 { return m_path
.get (); }
143 /* The program name, adjusted if needed. */
144 gdb::unique_xmalloc_ptr
<char> m_path
;
146 static std::vector
<char *> program_args
;
147 static std::string wrapper_argv
;
149 int pass_signals
[GDB_SIGNAL_LAST
];
150 int program_signals
[GDB_SIGNAL_LAST
];
151 int program_signals_p
;
153 /* The PID of the originally created or attached inferior. Used to
154 send signals to the process when GDB sends us an asynchronous interrupt
155 (user hitting Control-C in the client), and to wait for the child to exit
156 when no longer debugging it. */
158 unsigned long signal_pid
;
160 /* Set if you want to disable optional thread related packets support
161 in gdbserver, for the sake of testing GDB against stubs that don't
163 int disable_packet_vCont
;
164 int disable_packet_Tthread
;
165 int disable_packet_qC
;
166 int disable_packet_qfThreadInfo
;
168 /* Last status reported to GDB. */
169 struct target_waitstatus last_status
;
173 static unsigned char *mem_buf
;
175 /* A sub-class of 'struct notif_event' for stop, holding information
176 relative to a single stop reply. We keep a queue of these to
177 push to GDB in non-stop mode. */
181 struct notif_event base
;
183 /* Thread or process that got the event. */
187 struct target_waitstatus status
;
190 /* The current btrace configuration. This is gdbserver's mirror of GDB's
191 btrace configuration. */
192 static struct btrace_config current_btrace_conf
;
194 DEFINE_QUEUE_P (notif_event_p
);
196 /* Put a stop reply to the stop reply queue. */
199 queue_stop_reply (ptid_t ptid
, struct target_waitstatus
*status
)
201 struct vstop_notif
*new_notif
= XNEW (struct vstop_notif
);
203 new_notif
->ptid
= ptid
;
204 new_notif
->status
= *status
;
206 notif_event_enque (¬if_stop
, (struct notif_event
*) new_notif
);
210 remove_all_on_match_ptid (QUEUE (notif_event_p
) *q
,
211 QUEUE_ITER (notif_event_p
) *iter
,
212 struct notif_event
*event
,
215 ptid_t filter_ptid
= *(ptid_t
*) data
;
216 struct vstop_notif
*vstop_event
= (struct vstop_notif
*) event
;
218 if (ptid_match (vstop_event
->ptid
, filter_ptid
))
220 if (q
->free_func
!= NULL
)
221 q
->free_func (event
);
223 QUEUE_remove_elem (notif_event_p
, q
, iter
);
232 discard_queued_stop_replies (ptid_t ptid
)
234 QUEUE_iterate (notif_event_p
, notif_stop
.queue
,
235 remove_all_on_match_ptid
, &ptid
);
239 vstop_notif_reply (struct notif_event
*event
, char *own_buf
)
241 struct vstop_notif
*vstop
= (struct vstop_notif
*) event
;
243 prepare_resume_reply (own_buf
, vstop
->ptid
, &vstop
->status
);
246 /* QUEUE_iterate callback helper for in_queued_stop_replies. */
249 in_queued_stop_replies_ptid (QUEUE (notif_event_p
) *q
,
250 QUEUE_ITER (notif_event_p
) *iter
,
251 struct notif_event
*event
,
254 ptid_t filter_ptid
= *(ptid_t
*) data
;
255 struct vstop_notif
*vstop_event
= (struct vstop_notif
*) event
;
257 if (ptid_match (vstop_event
->ptid
, filter_ptid
))
260 /* Don't resume fork children that GDB does not know about yet. */
261 if ((vstop_event
->status
.kind
== TARGET_WAITKIND_FORKED
262 || vstop_event
->status
.kind
== TARGET_WAITKIND_VFORKED
)
263 && ptid_match (vstop_event
->status
.value
.related_pid
, filter_ptid
))
272 in_queued_stop_replies (ptid_t ptid
)
274 return !QUEUE_iterate (notif_event_p
, notif_stop
.queue
,
275 in_queued_stop_replies_ptid
, &ptid
);
278 struct notif_server notif_stop
=
280 "vStopped", "Stop", NULL
, vstop_notif_reply
,
284 target_running (void)
286 return get_first_thread () != NULL
;
289 /* See common/common-inferior.h. */
294 return !wrapper_argv
.empty () ? wrapper_argv
.c_str () : NULL
;
297 /* See common/common-inferior.h. */
300 get_exec_file (int err
)
302 if (err
&& program_path
.get () == NULL
)
303 error (_("No executable file specified."));
305 return program_path
.get ();
317 attach_inferior (int pid
)
319 /* myattach should return -1 if attaching is unsupported,
320 0 if it succeeded, and call error() otherwise. */
322 if (myattach (pid
) != 0)
325 fprintf (stderr
, "Attached; pid = %d\n", pid
);
328 /* FIXME - It may be that we should get the SIGNAL_PID from the
329 attach function, so that it can be the main thread instead of
330 whichever we were told to attach to. */
335 last_ptid
= mywait (pid_to_ptid (pid
), &last_status
, 0, 0);
337 /* GDB knows to ignore the first SIGSTOP after attaching to a running
338 process using the "attach" command, but this is different; it's
339 just using "target remote". Pretend it's just starting up. */
340 if (last_status
.kind
== TARGET_WAITKIND_STOPPED
341 && last_status
.value
.sig
== GDB_SIGNAL_STOP
)
342 last_status
.value
.sig
= GDB_SIGNAL_TRAP
;
344 current_thread
->last_resume_kind
= resume_stop
;
345 current_thread
->last_status
= last_status
;
351 extern int remote_debug
;
353 /* Decode a qXfer read request. Return 0 if everything looks OK,
357 decode_xfer_read (char *buf
, CORE_ADDR
*ofs
, unsigned int *len
)
359 /* After the read marker and annex, qXfer looks like a
360 traditional 'm' packet. */
361 decode_m_packet (buf
, ofs
, len
);
367 decode_xfer (char *buf
, char **object
, char **rw
, char **annex
, char **offset
)
369 /* Extract and NUL-terminate the object. */
371 while (*buf
&& *buf
!= ':')
377 /* Extract and NUL-terminate the read/write action. */
379 while (*buf
&& *buf
!= ':')
385 /* Extract and NUL-terminate the annex. */
387 while (*buf
&& *buf
!= ':')
397 /* Write the response to a successful qXfer read. Returns the
398 length of the (binary) data stored in BUF, corresponding
399 to as much of DATA/LEN as we could fit. IS_MORE controls
400 the first character of the response. */
402 write_qxfer_response (char *buf
, const gdb_byte
*data
, int len
, int is_more
)
411 return remote_escape_output (data
, len
, 1, (unsigned char *) buf
+ 1,
412 &out_len
, PBUFSIZ
- 2) + 1;
415 /* Handle btrace enabling in BTS format. */
418 handle_btrace_enable_bts (struct thread_info
*thread
)
420 if (thread
->btrace
!= NULL
)
421 error (_("Btrace already enabled."));
423 current_btrace_conf
.format
= BTRACE_FORMAT_BTS
;
424 thread
->btrace
= target_enable_btrace (thread
->id
, ¤t_btrace_conf
);
427 /* Handle btrace enabling in Intel Processor Trace format. */
430 handle_btrace_enable_pt (struct thread_info
*thread
)
432 if (thread
->btrace
!= NULL
)
433 error (_("Btrace already enabled."));
435 current_btrace_conf
.format
= BTRACE_FORMAT_PT
;
436 thread
->btrace
= target_enable_btrace (thread
->id
, ¤t_btrace_conf
);
439 /* Handle btrace disabling. */
442 handle_btrace_disable (struct thread_info
*thread
)
445 if (thread
->btrace
== NULL
)
446 error (_("Branch tracing not enabled."));
448 if (target_disable_btrace (thread
->btrace
) != 0)
449 error (_("Could not disable branch tracing."));
451 thread
->btrace
= NULL
;
454 /* Handle the "Qbtrace" packet. */
457 handle_btrace_general_set (char *own_buf
)
459 struct thread_info
*thread
;
462 if (!startswith (own_buf
, "Qbtrace:"))
465 op
= own_buf
+ strlen ("Qbtrace:");
467 if (ptid_equal (general_thread
, null_ptid
)
468 || ptid_equal (general_thread
, minus_one_ptid
))
470 strcpy (own_buf
, "E.Must select a single thread.");
474 thread
= find_thread_ptid (general_thread
);
477 strcpy (own_buf
, "E.No such thread.");
483 if (strcmp (op
, "bts") == 0)
484 handle_btrace_enable_bts (thread
);
485 else if (strcmp (op
, "pt") == 0)
486 handle_btrace_enable_pt (thread
);
487 else if (strcmp (op
, "off") == 0)
488 handle_btrace_disable (thread
);
490 error (_("Bad Qbtrace operation. Use bts, pt, or off."));
494 CATCH (exception
, RETURN_MASK_ERROR
)
496 sprintf (own_buf
, "E.%s", exception
.message
);
503 /* Handle the "Qbtrace-conf" packet. */
506 handle_btrace_conf_general_set (char *own_buf
)
508 struct thread_info
*thread
;
511 if (!startswith (own_buf
, "Qbtrace-conf:"))
514 op
= own_buf
+ strlen ("Qbtrace-conf:");
516 if (ptid_equal (general_thread
, null_ptid
)
517 || ptid_equal (general_thread
, minus_one_ptid
))
519 strcpy (own_buf
, "E.Must select a single thread.");
523 thread
= find_thread_ptid (general_thread
);
526 strcpy (own_buf
, "E.No such thread.");
530 if (startswith (op
, "bts:size="))
536 size
= strtoul (op
+ strlen ("bts:size="), &endp
, 16);
537 if (endp
== NULL
|| *endp
!= 0 || errno
!= 0 || size
> UINT_MAX
)
539 strcpy (own_buf
, "E.Bad size value.");
543 current_btrace_conf
.bts
.size
= (unsigned int) size
;
545 else if (strncmp (op
, "pt:size=", strlen ("pt:size=")) == 0)
551 size
= strtoul (op
+ strlen ("pt:size="), &endp
, 16);
552 if (endp
== NULL
|| *endp
!= 0 || errno
!= 0 || size
> UINT_MAX
)
554 strcpy (own_buf
, "E.Bad size value.");
558 current_btrace_conf
.pt
.size
= (unsigned int) size
;
562 strcpy (own_buf
, "E.Bad Qbtrace configuration option.");
570 /* Handle all of the extended 'Q' packets. */
573 handle_general_set (char *own_buf
)
575 if (startswith (own_buf
, "QPassSignals:"))
577 int numsigs
= (int) GDB_SIGNAL_LAST
, i
;
578 const char *p
= own_buf
+ strlen ("QPassSignals:");
581 p
= decode_address_to_semicolon (&cursig
, p
);
582 for (i
= 0; i
< numsigs
; i
++)
588 /* Keep looping, to clear the remaining signals. */
591 p
= decode_address_to_semicolon (&cursig
, p
);
596 strcpy (own_buf
, "OK");
600 if (startswith (own_buf
, "QProgramSignals:"))
602 int numsigs
= (int) GDB_SIGNAL_LAST
, i
;
603 const char *p
= own_buf
+ strlen ("QProgramSignals:");
606 program_signals_p
= 1;
608 p
= decode_address_to_semicolon (&cursig
, p
);
609 for (i
= 0; i
< numsigs
; i
++)
613 program_signals
[i
] = 1;
615 /* Keep looping, to clear the remaining signals. */
618 p
= decode_address_to_semicolon (&cursig
, p
);
621 program_signals
[i
] = 0;
623 strcpy (own_buf
, "OK");
627 if (startswith (own_buf
, "QCatchSyscalls:"))
629 const char *p
= own_buf
+ sizeof ("QCatchSyscalls:") - 1;
632 struct process_info
*process
;
634 if (!target_running () || !target_supports_catch_syscall ())
640 if (strcmp (p
, "0") == 0)
642 else if (p
[0] == '1' && (p
[1] == ';' || p
[1] == '\0'))
646 fprintf (stderr
, "Unknown catch-syscalls mode requested: %s\n",
652 process
= current_process ();
653 process
->syscalls_to_catch
.clear ();
663 p
= decode_address_to_semicolon (&sysno
, p
);
664 process
->syscalls_to_catch
.push_back (sysno
);
668 process
->syscalls_to_catch
.push_back (ANY_SYSCALL
);
675 if (strcmp (own_buf
, "QEnvironmentReset") == 0)
677 our_environ
= gdb_environ::from_host_environ ();
683 if (startswith (own_buf
, "QEnvironmentHexEncoded:"))
685 const char *p
= own_buf
+ sizeof ("QEnvironmentHexEncoded:") - 1;
686 /* The final form of the environment variable. FINAL_VAR will
687 hold the 'VAR=VALUE' format. */
688 std::string final_var
= hex2str (p
);
689 std::string var_name
, var_value
;
693 debug_printf (_("[QEnvironmentHexEncoded received '%s']\n"), p
);
694 debug_printf (_("[Environment variable to be set: '%s']\n"),
699 size_t pos
= final_var
.find ('=');
700 if (pos
== std::string::npos
)
702 warning (_("Unexpected format for environment variable: '%s'"),
708 var_name
= final_var
.substr (0, pos
);
709 var_value
= final_var
.substr (pos
+ 1, std::string::npos
);
711 our_environ
.set (var_name
.c_str (), var_value
.c_str ());
717 if (startswith (own_buf
, "QEnvironmentUnset:"))
719 const char *p
= own_buf
+ sizeof ("QEnvironmentUnset:") - 1;
720 std::string varname
= hex2str (p
);
724 debug_printf (_("[QEnvironmentUnset received '%s']\n"), p
);
725 debug_printf (_("[Environment variable to be unset: '%s']\n"),
730 our_environ
.unset (varname
.c_str ());
736 if (strcmp (own_buf
, "QStartNoAckMode") == 0)
740 debug_printf ("[noack mode enabled]\n");
749 if (startswith (own_buf
, "QNonStop:"))
751 char *mode
= own_buf
+ 9;
755 if (strcmp (mode
, "0") == 0)
757 else if (strcmp (mode
, "1") == 0)
761 /* We don't know what this mode is, so complain to
763 fprintf (stderr
, "Unknown non-stop mode requested: %s\n",
769 req_str
= req
? "non-stop" : "all-stop";
770 if (start_non_stop (req
) != 0)
772 fprintf (stderr
, "Setting %s mode failed\n", req_str
);
780 debug_printf ("[%s mode enabled]\n", req_str
);
786 if (startswith (own_buf
, "QDisableRandomization:"))
788 char *packet
= own_buf
+ strlen ("QDisableRandomization:");
791 unpack_varlen_hex (packet
, &setting
);
792 disable_randomization
= setting
;
796 debug_printf (disable_randomization
797 ? "[address space randomization disabled]\n"
798 : "[address space randomization enabled]\n");
805 if (target_supports_tracepoints ()
806 && handle_tracepoint_general_set (own_buf
))
809 if (startswith (own_buf
, "QAgent:"))
811 char *mode
= own_buf
+ strlen ("QAgent:");
814 if (strcmp (mode
, "0") == 0)
816 else if (strcmp (mode
, "1") == 0)
820 /* We don't know what this value is, so complain to GDB. */
821 sprintf (own_buf
, "E.Unknown QAgent value");
825 /* Update the flag. */
828 debug_printf ("[%s agent]\n", req
? "Enable" : "Disable");
833 if (handle_btrace_general_set (own_buf
))
836 if (handle_btrace_conf_general_set (own_buf
))
839 if (startswith (own_buf
, "QThreadEvents:"))
841 char *mode
= own_buf
+ strlen ("QThreadEvents:");
842 enum tribool req
= TRIBOOL_UNKNOWN
;
844 if (strcmp (mode
, "0") == 0)
846 else if (strcmp (mode
, "1") == 0)
850 /* We don't know what this mode is, so complain to GDB. */
851 sprintf (own_buf
, "E.Unknown thread-events mode requested: %s\n",
856 report_thread_events
= (req
== TRIBOOL_TRUE
);
860 const char *req_str
= report_thread_events
? "enabled" : "disabled";
862 debug_printf ("[thread events are now %s]\n", req_str
);
869 if (startswith (own_buf
, "QStartupWithShell:"))
871 const char *value
= own_buf
+ strlen ("QStartupWithShell:");
873 if (strcmp (value
, "1") == 0)
874 startup_with_shell
= true;
875 else if (strcmp (value
, "0") == 0)
876 startup_with_shell
= false;
880 fprintf (stderr
, "Unknown value to startup-with-shell: %s\n",
887 debug_printf (_("[Inferior will %s started with shell]"),
888 startup_with_shell
? "be" : "not be");
894 if (startswith (own_buf
, "QSetWorkingDir:"))
896 const char *p
= own_buf
+ strlen ("QSetWorkingDir:");
900 std::string path
= hex2str (p
);
902 set_inferior_cwd (path
.c_str ());
905 debug_printf (_("[Set the inferior's current directory to %s]\n"),
910 /* An empty argument means that we should clear out any
911 previously set cwd for the inferior. */
912 set_inferior_cwd (NULL
);
916 [Unset the inferior's current directory; will use gdbserver's cwd]\n"));
923 /* Otherwise we didn't know what packet it was. Say we didn't
929 get_features_xml (const char *annex
)
931 const struct target_desc
*desc
= current_target_desc ();
933 /* `desc->xmltarget' defines what to return when looking for the
934 "target.xml" file. Its contents can either be verbatim XML code
935 (prefixed with a '@') or else the name of the actual XML file to
936 be used in place of "target.xml".
938 This variable is set up from the auto-generated
939 init_registers_... routine for the current target. */
941 if (strcmp (annex
, "target.xml") == 0)
943 const char *ret
= tdesc_get_features_xml ((target_desc
*) desc
);
953 extern const char *const xml_builtin
[][2];
956 /* Look for the annex. */
957 for (i
= 0; xml_builtin
[i
][0] != NULL
; i
++)
958 if (strcmp (annex
, xml_builtin
[i
][0]) == 0)
961 if (xml_builtin
[i
][0] != NULL
)
962 return xml_builtin
[i
][1];
970 monitor_show_help (void)
972 monitor_output ("The following monitor commands are supported:\n");
973 monitor_output (" set debug <0|1>\n");
974 monitor_output (" Enable general debugging messages\n");
975 monitor_output (" set debug-hw-points <0|1>\n");
976 monitor_output (" Enable h/w breakpoint/watchpoint debugging messages\n");
977 monitor_output (" set remote-debug <0|1>\n");
978 monitor_output (" Enable remote protocol debugging messages\n");
979 monitor_output (" set debug-format option1[,option2,...]\n");
980 monitor_output (" Add additional information to debugging messages\n");
981 monitor_output (" Options: all, none");
982 monitor_output (", timestamp");
983 monitor_output ("\n");
984 monitor_output (" exit\n");
985 monitor_output (" Quit GDBserver\n");
988 /* Read trace frame or inferior memory. Returns the number of bytes
989 actually read, zero when no further transfer is possible, and -1 on
990 error. Return of a positive value smaller than LEN does not
991 indicate there's no more to be read, only the end of the transfer.
992 E.g., when GDB reads memory from a traceframe, a first request may
993 be served from a memory block that does not cover the whole request
994 length. A following request gets the rest served from either
995 another block (of the same traceframe) or from the read-only
999 gdb_read_memory (CORE_ADDR memaddr
, unsigned char *myaddr
, int len
)
1003 if (current_traceframe
>= 0)
1006 ULONGEST length
= len
;
1008 if (traceframe_read_mem (current_traceframe
,
1009 memaddr
, myaddr
, len
, &nbytes
))
1011 /* Data read from trace buffer, we're done. */
1014 if (!in_readonly_region (memaddr
, length
))
1016 /* Otherwise we have a valid readonly case, fall through. */
1017 /* (assume no half-trace half-real blocks for now) */
1020 res
= prepare_to_access_memory ();
1023 if (set_desired_thread ())
1024 res
= read_inferior_memory (memaddr
, myaddr
, len
);
1027 done_accessing_memory ();
1029 return res
== 0 ? len
: -1;
1035 /* Write trace frame or inferior memory. Actually, writing to trace
1036 frames is forbidden. */
1039 gdb_write_memory (CORE_ADDR memaddr
, const unsigned char *myaddr
, int len
)
1041 if (current_traceframe
>= 0)
1047 ret
= prepare_to_access_memory ();
1050 if (set_desired_thread ())
1051 ret
= write_inferior_memory (memaddr
, myaddr
, len
);
1054 done_accessing_memory ();
1060 /* Subroutine of handle_search_memory to simplify it. */
1063 handle_search_memory_1 (CORE_ADDR start_addr
, CORE_ADDR search_space_len
,
1064 gdb_byte
*pattern
, unsigned pattern_len
,
1065 gdb_byte
*search_buf
,
1066 unsigned chunk_size
, unsigned search_buf_size
,
1067 CORE_ADDR
*found_addrp
)
1069 /* Prime the search buffer. */
1071 if (gdb_read_memory (start_addr
, search_buf
, search_buf_size
)
1074 warning ("Unable to access %ld bytes of target "
1075 "memory at 0x%lx, halting search.",
1076 (long) search_buf_size
, (long) start_addr
);
1080 /* Perform the search.
1082 The loop is kept simple by allocating [N + pattern-length - 1] bytes.
1083 When we've scanned N bytes we copy the trailing bytes to the start and
1084 read in another N bytes. */
1086 while (search_space_len
>= pattern_len
)
1088 gdb_byte
*found_ptr
;
1089 unsigned nr_search_bytes
= (search_space_len
< search_buf_size
1093 found_ptr
= (gdb_byte
*) memmem (search_buf
, nr_search_bytes
, pattern
,
1096 if (found_ptr
!= NULL
)
1098 CORE_ADDR found_addr
= start_addr
+ (found_ptr
- search_buf
);
1099 *found_addrp
= found_addr
;
1103 /* Not found in this chunk, skip to next chunk. */
1105 /* Don't let search_space_len wrap here, it's unsigned. */
1106 if (search_space_len
>= chunk_size
)
1107 search_space_len
-= chunk_size
;
1109 search_space_len
= 0;
1111 if (search_space_len
>= pattern_len
)
1113 unsigned keep_len
= search_buf_size
- chunk_size
;
1114 CORE_ADDR read_addr
= start_addr
+ chunk_size
+ keep_len
;
1117 /* Copy the trailing part of the previous iteration to the front
1118 of the buffer for the next iteration. */
1119 memcpy (search_buf
, search_buf
+ chunk_size
, keep_len
);
1121 nr_to_read
= (search_space_len
- keep_len
< chunk_size
1122 ? search_space_len
- keep_len
1125 if (gdb_read_memory (read_addr
, search_buf
+ keep_len
,
1126 nr_to_read
) != search_buf_size
)
1128 warning ("Unable to access %ld bytes of target memory "
1129 "at 0x%lx, halting search.",
1130 (long) nr_to_read
, (long) read_addr
);
1134 start_addr
+= chunk_size
;
1143 /* Handle qSearch:memory packets. */
1146 handle_search_memory (char *own_buf
, int packet_len
)
1148 CORE_ADDR start_addr
;
1149 CORE_ADDR search_space_len
;
1151 unsigned int pattern_len
;
1152 /* NOTE: also defined in find.c testcase. */
1153 #define SEARCH_CHUNK_SIZE 16000
1154 const unsigned chunk_size
= SEARCH_CHUNK_SIZE
;
1155 /* Buffer to hold memory contents for searching. */
1156 gdb_byte
*search_buf
;
1157 unsigned search_buf_size
;
1159 CORE_ADDR found_addr
;
1160 int cmd_name_len
= sizeof ("qSearch:memory:") - 1;
1162 pattern
= (gdb_byte
*) malloc (packet_len
);
1163 if (pattern
== NULL
)
1165 error ("Unable to allocate memory to perform the search");
1166 strcpy (own_buf
, "E00");
1169 if (decode_search_memory_packet (own_buf
+ cmd_name_len
,
1170 packet_len
- cmd_name_len
,
1171 &start_addr
, &search_space_len
,
1172 pattern
, &pattern_len
) < 0)
1175 error ("Error in parsing qSearch:memory packet");
1176 strcpy (own_buf
, "E00");
1180 search_buf_size
= chunk_size
+ pattern_len
- 1;
1182 /* No point in trying to allocate a buffer larger than the search space. */
1183 if (search_space_len
< search_buf_size
)
1184 search_buf_size
= search_space_len
;
1186 search_buf
= (gdb_byte
*) malloc (search_buf_size
);
1187 if (search_buf
== NULL
)
1190 error ("Unable to allocate memory to perform the search");
1191 strcpy (own_buf
, "E00");
1195 found
= handle_search_memory_1 (start_addr
, search_space_len
,
1196 pattern
, pattern_len
,
1197 search_buf
, chunk_size
, search_buf_size
,
1201 sprintf (own_buf
, "1,%lx", (long) found_addr
);
1202 else if (found
== 0)
1203 strcpy (own_buf
, "0");
1205 strcpy (own_buf
, "E00");
1211 /* Handle the "D" packet. */
1214 handle_detach (char *own_buf
)
1216 require_running_or_return (own_buf
);
1223 pid
= strtol (&own_buf
[2], NULL
, 16);
1226 pid
= ptid_get_pid (current_ptid
);
1228 if ((tracing
&& disconnected_tracing
) || any_persistent_commands ())
1230 struct process_info
*process
= find_process_pid (pid
);
1232 if (process
== NULL
)
1234 write_enn (own_buf
);
1238 if (tracing
&& disconnected_tracing
)
1240 "Disconnected tracing in effect, "
1241 "leaving gdbserver attached to the process\n");
1243 if (any_persistent_commands ())
1245 "Persistent commands are present, "
1246 "leaving gdbserver attached to the process\n");
1248 /* Make sure we're in non-stop/async mode, so we we can both
1249 wait for an async socket accept, and handle async target
1250 events simultaneously. There's also no point either in
1251 having the target stop all threads, when we're going to
1252 pass signals down without informing GDB. */
1256 debug_printf ("Forcing non-stop mode\n");
1262 process
->gdb_detached
= 1;
1264 /* Detaching implicitly resumes all threads. */
1265 target_continue_no_signal (minus_one_ptid
);
1271 fprintf (stderr
, "Detaching from process %d\n", pid
);
1273 if (detach_inferior (pid
) != 0)
1274 write_enn (own_buf
);
1277 discard_queued_stop_replies (pid_to_ptid (pid
));
1280 if (extended_protocol
|| target_running ())
1282 /* There is still at least one inferior remaining or
1283 we are in extended mode, so don't terminate gdbserver,
1284 and instead treat this like a normal program exit. */
1285 last_status
.kind
= TARGET_WAITKIND_EXITED
;
1286 last_status
.value
.integer
= 0;
1287 last_ptid
= pid_to_ptid (pid
);
1289 current_thread
= NULL
;
1296 /* If we are attached, then we can exit. Otherwise, we
1297 need to hang around doing nothing, until the child is
1299 join_inferior (pid
);
1305 /* Parse options to --debug-format= and "monitor set debug-format".
1306 ARG is the text after "--debug-format=" or "monitor set debug-format".
1307 IS_MONITOR is non-zero if we're invoked via "monitor set debug-format".
1308 This triggers calls to monitor_output.
1309 The result is an empty string if all options were parsed ok, otherwise an
1310 error message which the caller must free.
1312 N.B. These commands affect all debug format settings, they are not
1313 cumulative. If a format is not specified, it is turned off.
1314 However, we don't go to extra trouble with things like
1315 "monitor set debug-format all,none,timestamp".
1316 Instead we just parse them one at a time, in order.
1318 The syntax for "monitor set debug" we support here is not identical
1319 to gdb's "set debug foo on|off" because we also use this function to
1320 parse "--debug-format=foo,bar". */
1323 parse_debug_format_options (const char *arg
, int is_monitor
)
1325 /* First turn all debug format options off. */
1326 debug_timestamp
= 0;
1328 /* First remove leading spaces, for "monitor set debug-format". */
1329 while (isspace (*arg
))
1332 std::vector
<gdb::unique_xmalloc_ptr
<char>> options
1333 = delim_string_to_char_ptr_vec (arg
, ',');
1335 for (const gdb::unique_xmalloc_ptr
<char> &option
: options
)
1337 if (strcmp (option
.get (), "all") == 0)
1339 debug_timestamp
= 1;
1341 monitor_output ("All extra debug format options enabled.\n");
1343 else if (strcmp (option
.get (), "none") == 0)
1345 debug_timestamp
= 0;
1347 monitor_output ("All extra debug format options disabled.\n");
1349 else if (strcmp (option
.get (), "timestamp") == 0)
1351 debug_timestamp
= 1;
1353 monitor_output ("Timestamps will be added to debug output.\n");
1355 else if (*option
== '\0')
1357 /* An empty option, e.g., "--debug-format=foo,,bar", is ignored. */
1361 return string_printf ("Unknown debug-format argument: \"%s\"\n",
1365 return std::string ();
1368 /* Handle monitor commands not handled by target-specific handlers. */
1371 handle_monitor_command (char *mon
, char *own_buf
)
1373 if (strcmp (mon
, "set debug 1") == 0)
1376 monitor_output ("Debug output enabled.\n");
1378 else if (strcmp (mon
, "set debug 0") == 0)
1381 monitor_output ("Debug output disabled.\n");
1383 else if (strcmp (mon
, "set debug-hw-points 1") == 0)
1385 show_debug_regs
= 1;
1386 monitor_output ("H/W point debugging output enabled.\n");
1388 else if (strcmp (mon
, "set debug-hw-points 0") == 0)
1390 show_debug_regs
= 0;
1391 monitor_output ("H/W point debugging output disabled.\n");
1393 else if (strcmp (mon
, "set remote-debug 1") == 0)
1396 monitor_output ("Protocol debug output enabled.\n");
1398 else if (strcmp (mon
, "set remote-debug 0") == 0)
1401 monitor_output ("Protocol debug output disabled.\n");
1403 else if (startswith (mon
, "set debug-format "))
1405 std::string error_msg
1406 = parse_debug_format_options (mon
+ sizeof ("set debug-format ") - 1,
1409 if (!error_msg
.empty ())
1411 monitor_output (error_msg
.c_str ());
1412 monitor_show_help ();
1413 write_enn (own_buf
);
1416 else if (strcmp (mon
, "help") == 0)
1417 monitor_show_help ();
1418 else if (strcmp (mon
, "exit") == 0)
1422 monitor_output ("Unknown monitor command.\n\n");
1423 monitor_show_help ();
1424 write_enn (own_buf
);
1428 /* Associates a callback with each supported qXfer'able object. */
1432 /* The object this handler handles. */
1435 /* Request that the target transfer up to LEN 8-bit bytes of the
1436 target's OBJECT. The OFFSET, for a seekable object, specifies
1437 the starting point. The ANNEX can be used to provide additional
1438 data-specific information to the target.
1440 Return the number of bytes actually transfered, zero when no
1441 further transfer is possible, -1 on error, -2 when the transfer
1442 is not supported, and -3 on a verbose error message that should
1443 be preserved. Return of a positive value smaller than LEN does
1444 not indicate the end of the object, only the end of the transfer.
1446 One, and only one, of readbuf or writebuf must be non-NULL. */
1447 int (*xfer
) (const char *annex
,
1448 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1449 ULONGEST offset
, LONGEST len
);
1452 /* Handle qXfer:auxv:read. */
1455 handle_qxfer_auxv (const char *annex
,
1456 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1457 ULONGEST offset
, LONGEST len
)
1459 if (the_target
->read_auxv
== NULL
|| writebuf
!= NULL
)
1462 if (annex
[0] != '\0' || current_thread
== NULL
)
1465 return (*the_target
->read_auxv
) (offset
, readbuf
, len
);
1468 /* Handle qXfer:exec-file:read. */
1471 handle_qxfer_exec_file (const char *annex
,
1472 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1473 ULONGEST offset
, LONGEST len
)
1479 if (the_target
->pid_to_exec_file
== NULL
|| writebuf
!= NULL
)
1482 if (annex
[0] == '\0')
1484 if (current_thread
== NULL
)
1487 pid
= pid_of (current_thread
);
1491 annex
= unpack_varlen_hex (annex
, &pid
);
1492 if (annex
[0] != '\0')
1499 file
= (*the_target
->pid_to_exec_file
) (pid
);
1503 total_len
= strlen (file
);
1505 if (offset
> total_len
)
1508 if (offset
+ len
> total_len
)
1509 len
= total_len
- offset
;
1511 memcpy (readbuf
, file
+ offset
, len
);
1515 /* Handle qXfer:features:read. */
1518 handle_qxfer_features (const char *annex
,
1519 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1520 ULONGEST offset
, LONGEST len
)
1522 const char *document
;
1525 if (writebuf
!= NULL
)
1528 if (!target_running ())
1531 /* Grab the correct annex. */
1532 document
= get_features_xml (annex
);
1533 if (document
== NULL
)
1536 total_len
= strlen (document
);
1538 if (offset
> total_len
)
1541 if (offset
+ len
> total_len
)
1542 len
= total_len
- offset
;
1544 memcpy (readbuf
, document
+ offset
, len
);
1548 /* Handle qXfer:libraries:read. */
1551 handle_qxfer_libraries (const char *annex
,
1552 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1553 ULONGEST offset
, LONGEST len
)
1555 if (writebuf
!= NULL
)
1558 if (annex
[0] != '\0' || current_thread
== NULL
)
1561 std::string document
= "<library-list version=\"1.0\">\n";
1563 for (const dll_info
&dll
: all_dlls
)
1564 document
+= string_printf
1565 (" <library name=\"%s\"><segment address=\"0x%lx\"/></library>\n",
1566 dll
.name
.c_str (), (long) dll
.base_addr
);
1568 document
+= "</library-list>\n";
1570 if (offset
> document
.length ())
1573 if (offset
+ len
> document
.length ())
1574 len
= document
.length () - offset
;
1576 memcpy (readbuf
, &document
[offset
], len
);
1581 /* Handle qXfer:libraries-svr4:read. */
1584 handle_qxfer_libraries_svr4 (const char *annex
,
1585 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1586 ULONGEST offset
, LONGEST len
)
1588 if (writebuf
!= NULL
)
1591 if (current_thread
== NULL
|| the_target
->qxfer_libraries_svr4
== NULL
)
1594 return the_target
->qxfer_libraries_svr4 (annex
, readbuf
, writebuf
, offset
, len
);
1597 /* Handle qXfer:osadata:read. */
1600 handle_qxfer_osdata (const char *annex
,
1601 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1602 ULONGEST offset
, LONGEST len
)
1604 if (the_target
->qxfer_osdata
== NULL
|| writebuf
!= NULL
)
1607 return (*the_target
->qxfer_osdata
) (annex
, readbuf
, NULL
, offset
, len
);
1610 /* Handle qXfer:siginfo:read and qXfer:siginfo:write. */
1613 handle_qxfer_siginfo (const char *annex
,
1614 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1615 ULONGEST offset
, LONGEST len
)
1617 if (the_target
->qxfer_siginfo
== NULL
)
1620 if (annex
[0] != '\0' || current_thread
== NULL
)
1623 return (*the_target
->qxfer_siginfo
) (annex
, readbuf
, writebuf
, offset
, len
);
1626 /* Handle qXfer:spu:read and qXfer:spu:write. */
1629 handle_qxfer_spu (const char *annex
,
1630 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1631 ULONGEST offset
, LONGEST len
)
1633 if (the_target
->qxfer_spu
== NULL
)
1636 if (current_thread
== NULL
)
1639 return (*the_target
->qxfer_spu
) (annex
, readbuf
, writebuf
, offset
, len
);
1642 /* Handle qXfer:statictrace:read. */
1645 handle_qxfer_statictrace (const char *annex
,
1646 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1647 ULONGEST offset
, LONGEST len
)
1651 if (writebuf
!= NULL
)
1654 if (annex
[0] != '\0' || current_thread
== NULL
|| current_traceframe
== -1)
1657 if (traceframe_read_sdata (current_traceframe
, offset
,
1658 readbuf
, len
, &nbytes
))
1663 /* Helper for handle_qxfer_threads_proper.
1664 Emit the XML to describe the thread of INF. */
1667 handle_qxfer_threads_worker (thread_info
*thread
, struct buffer
*buffer
)
1669 ptid_t ptid
= ptid_of (thread
);
1671 int core
= target_core_of_thread (ptid
);
1673 const char *name
= target_thread_name (ptid
);
1676 bool handle_status
= target_thread_handle (ptid
, &handle
, &handle_len
);
1678 write_ptid (ptid_s
, ptid
);
1680 buffer_xml_printf (buffer
, "<thread id=\"%s\"", ptid_s
);
1684 sprintf (core_s
, "%d", core
);
1685 buffer_xml_printf (buffer
, " core=\"%s\"", core_s
);
1689 buffer_xml_printf (buffer
, " name=\"%s\"", name
);
1693 char *handle_s
= (char *) alloca (handle_len
* 2 + 1);
1694 bin2hex (handle
, handle_s
, handle_len
);
1695 buffer_xml_printf (buffer
, " handle=\"%s\"", handle_s
);
1698 buffer_xml_printf (buffer
, "/>\n");
1701 /* Helper for handle_qxfer_threads. */
1704 handle_qxfer_threads_proper (struct buffer
*buffer
)
1706 buffer_grow_str (buffer
, "<threads>\n");
1708 for_each_thread ([&] (thread_info
*thread
)
1710 handle_qxfer_threads_worker (thread
, buffer
);
1713 buffer_grow_str0 (buffer
, "</threads>\n");
1716 /* Handle qXfer:threads:read. */
1719 handle_qxfer_threads (const char *annex
,
1720 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1721 ULONGEST offset
, LONGEST len
)
1723 static char *result
= 0;
1724 static unsigned int result_length
= 0;
1726 if (writebuf
!= NULL
)
1729 if (annex
[0] != '\0')
1734 struct buffer buffer
;
1735 /* When asked for data at offset 0, generate everything and store into
1736 'result'. Successive reads will be served off 'result'. */
1740 buffer_init (&buffer
);
1742 handle_qxfer_threads_proper (&buffer
);
1744 result
= buffer_finish (&buffer
);
1745 result_length
= strlen (result
);
1746 buffer_free (&buffer
);
1749 if (offset
>= result_length
)
1751 /* We're out of data. */
1758 if (len
> result_length
- offset
)
1759 len
= result_length
- offset
;
1761 memcpy (readbuf
, result
+ offset
, len
);
1766 /* Handle qXfer:traceframe-info:read. */
1769 handle_qxfer_traceframe_info (const char *annex
,
1770 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1771 ULONGEST offset
, LONGEST len
)
1773 static char *result
= 0;
1774 static unsigned int result_length
= 0;
1776 if (writebuf
!= NULL
)
1779 if (!target_running () || annex
[0] != '\0' || current_traceframe
== -1)
1784 struct buffer buffer
;
1786 /* When asked for data at offset 0, generate everything and
1787 store into 'result'. Successive reads will be served off
1791 buffer_init (&buffer
);
1793 traceframe_read_info (current_traceframe
, &buffer
);
1795 result
= buffer_finish (&buffer
);
1796 result_length
= strlen (result
);
1797 buffer_free (&buffer
);
1800 if (offset
>= result_length
)
1802 /* We're out of data. */
1809 if (len
> result_length
- offset
)
1810 len
= result_length
- offset
;
1812 memcpy (readbuf
, result
+ offset
, len
);
1816 /* Handle qXfer:fdpic:read. */
1819 handle_qxfer_fdpic (const char *annex
, gdb_byte
*readbuf
,
1820 const gdb_byte
*writebuf
, ULONGEST offset
, LONGEST len
)
1822 if (the_target
->read_loadmap
== NULL
)
1825 if (current_thread
== NULL
)
1828 return (*the_target
->read_loadmap
) (annex
, offset
, readbuf
, len
);
1831 /* Handle qXfer:btrace:read. */
1834 handle_qxfer_btrace (const char *annex
,
1835 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1836 ULONGEST offset
, LONGEST len
)
1838 static struct buffer cache
;
1839 struct thread_info
*thread
;
1840 enum btrace_read_type type
;
1843 if (writebuf
!= NULL
)
1846 if (ptid_equal (general_thread
, null_ptid
)
1847 || ptid_equal (general_thread
, minus_one_ptid
))
1849 strcpy (own_buf
, "E.Must select a single thread.");
1853 thread
= find_thread_ptid (general_thread
);
1856 strcpy (own_buf
, "E.No such thread.");
1860 if (thread
->btrace
== NULL
)
1862 strcpy (own_buf
, "E.Btrace not enabled.");
1866 if (strcmp (annex
, "all") == 0)
1867 type
= BTRACE_READ_ALL
;
1868 else if (strcmp (annex
, "new") == 0)
1869 type
= BTRACE_READ_NEW
;
1870 else if (strcmp (annex
, "delta") == 0)
1871 type
= BTRACE_READ_DELTA
;
1874 strcpy (own_buf
, "E.Bad annex.");
1880 buffer_free (&cache
);
1884 result
= target_read_btrace (thread
->btrace
, &cache
, type
);
1886 memcpy (own_buf
, cache
.buffer
, cache
.used_size
);
1888 CATCH (exception
, RETURN_MASK_ERROR
)
1890 sprintf (own_buf
, "E.%s", exception
.message
);
1898 else if (offset
> cache
.used_size
)
1900 buffer_free (&cache
);
1904 if (len
> cache
.used_size
- offset
)
1905 len
= cache
.used_size
- offset
;
1907 memcpy (readbuf
, cache
.buffer
+ offset
, len
);
1912 /* Handle qXfer:btrace-conf:read. */
1915 handle_qxfer_btrace_conf (const char *annex
,
1916 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1917 ULONGEST offset
, LONGEST len
)
1919 static struct buffer cache
;
1920 struct thread_info
*thread
;
1923 if (writebuf
!= NULL
)
1926 if (annex
[0] != '\0')
1929 if (ptid_equal (general_thread
, null_ptid
)
1930 || ptid_equal (general_thread
, minus_one_ptid
))
1932 strcpy (own_buf
, "E.Must select a single thread.");
1936 thread
= find_thread_ptid (general_thread
);
1939 strcpy (own_buf
, "E.No such thread.");
1943 if (thread
->btrace
== NULL
)
1945 strcpy (own_buf
, "E.Btrace not enabled.");
1951 buffer_free (&cache
);
1955 result
= target_read_btrace_conf (thread
->btrace
, &cache
);
1957 memcpy (own_buf
, cache
.buffer
, cache
.used_size
);
1959 CATCH (exception
, RETURN_MASK_ERROR
)
1961 sprintf (own_buf
, "E.%s", exception
.message
);
1969 else if (offset
> cache
.used_size
)
1971 buffer_free (&cache
);
1975 if (len
> cache
.used_size
- offset
)
1976 len
= cache
.used_size
- offset
;
1978 memcpy (readbuf
, cache
.buffer
+ offset
, len
);
1983 static const struct qxfer qxfer_packets
[] =
1985 { "auxv", handle_qxfer_auxv
},
1986 { "btrace", handle_qxfer_btrace
},
1987 { "btrace-conf", handle_qxfer_btrace_conf
},
1988 { "exec-file", handle_qxfer_exec_file
},
1989 { "fdpic", handle_qxfer_fdpic
},
1990 { "features", handle_qxfer_features
},
1991 { "libraries", handle_qxfer_libraries
},
1992 { "libraries-svr4", handle_qxfer_libraries_svr4
},
1993 { "osdata", handle_qxfer_osdata
},
1994 { "siginfo", handle_qxfer_siginfo
},
1995 { "spu", handle_qxfer_spu
},
1996 { "statictrace", handle_qxfer_statictrace
},
1997 { "threads", handle_qxfer_threads
},
1998 { "traceframe-info", handle_qxfer_traceframe_info
},
2002 handle_qxfer (char *own_buf
, int packet_len
, int *new_packet_len_p
)
2010 if (!startswith (own_buf
, "qXfer:"))
2013 /* Grab the object, r/w and annex. */
2014 if (decode_xfer (own_buf
+ 6, &object
, &rw
, &annex
, &offset
) < 0)
2016 write_enn (own_buf
);
2021 i
< sizeof (qxfer_packets
) / sizeof (qxfer_packets
[0]);
2024 const struct qxfer
*q
= &qxfer_packets
[i
];
2026 if (strcmp (object
, q
->object
) == 0)
2028 if (strcmp (rw
, "read") == 0)
2030 unsigned char *data
;
2035 /* Grab the offset and length. */
2036 if (decode_xfer_read (offset
, &ofs
, &len
) < 0)
2038 write_enn (own_buf
);
2042 /* Read one extra byte, as an indicator of whether there is
2044 if (len
> PBUFSIZ
- 2)
2046 data
= (unsigned char *) malloc (len
+ 1);
2049 write_enn (own_buf
);
2052 n
= (*q
->xfer
) (annex
, data
, NULL
, ofs
, len
+ 1);
2060 /* Preserve error message. */
2063 write_enn (own_buf
);
2065 *new_packet_len_p
= write_qxfer_response (own_buf
, data
, len
, 1);
2067 *new_packet_len_p
= write_qxfer_response (own_buf
, data
, n
, 0);
2072 else if (strcmp (rw
, "write") == 0)
2077 unsigned char *data
;
2079 strcpy (own_buf
, "E00");
2080 data
= (unsigned char *) malloc (packet_len
- (offset
- own_buf
));
2083 write_enn (own_buf
);
2086 if (decode_xfer_write (offset
, packet_len
- (offset
- own_buf
),
2087 &ofs
, &len
, data
) < 0)
2090 write_enn (own_buf
);
2094 n
= (*q
->xfer
) (annex
, NULL
, data
, ofs
, len
);
2102 /* Preserve error message. */
2105 write_enn (own_buf
);
2107 sprintf (own_buf
, "%x", n
);
2120 /* Compute 32 bit CRC from inferior memory.
2122 On success, return 32 bit CRC.
2123 On failure, return (unsigned long long) -1. */
2125 static unsigned long long
2126 crc32 (CORE_ADDR base
, int len
, unsigned int crc
)
2130 unsigned char byte
= 0;
2132 /* Return failure if memory read fails. */
2133 if (read_inferior_memory (base
, &byte
, 1) != 0)
2134 return (unsigned long long) -1;
2136 crc
= xcrc32 (&byte
, 1, crc
);
2139 return (unsigned long long) crc
;
2142 /* Add supported btrace packets to BUF. */
2145 supported_btrace_packets (char *buf
)
2147 strcat (buf
, ";Qbtrace:bts+");
2148 strcat (buf
, ";Qbtrace-conf:bts:size+");
2149 strcat (buf
, ";Qbtrace:pt+");
2150 strcat (buf
, ";Qbtrace-conf:pt:size+");
2151 strcat (buf
, ";Qbtrace:off+");
2152 strcat (buf
, ";qXfer:btrace:read+");
2153 strcat (buf
, ";qXfer:btrace-conf:read+");
2156 /* Handle all of the extended 'q' packets. */
2159 handle_query (char *own_buf
, int packet_len
, int *new_packet_len_p
)
2161 static std::list
<thread_info
*>::const_iterator thread_iter
;
2163 /* Reply the current thread id. */
2164 if (strcmp ("qC", own_buf
) == 0 && !disable_packet_qC
)
2167 require_running_or_return (own_buf
);
2169 if (general_thread
!= null_ptid
&& general_thread
!= minus_one_ptid
)
2170 ptid
= general_thread
;
2173 thread_iter
= all_threads
.begin ();
2174 ptid
= (*thread_iter
)->id
;
2177 sprintf (own_buf
, "QC");
2179 write_ptid (own_buf
, ptid
);
2183 if (strcmp ("qSymbol::", own_buf
) == 0)
2185 struct thread_info
*save_thread
= current_thread
;
2187 /* For qSymbol, GDB only changes the current thread if the
2188 previous current thread was of a different process. So if
2189 the previous thread is gone, we need to pick another one of
2190 the same process. This can happen e.g., if we followed an
2191 exec in a non-leader thread. */
2192 if (current_thread
== NULL
)
2195 = find_any_thread_of_pid (ptid_get_pid (general_thread
));
2197 /* Just in case, if we didn't find a thread, then bail out
2198 instead of crashing. */
2199 if (current_thread
== NULL
)
2201 write_enn (own_buf
);
2202 current_thread
= save_thread
;
2207 /* GDB is suggesting new symbols have been loaded. This may
2208 mean a new shared library has been detected as loaded, so
2209 take the opportunity to check if breakpoints we think are
2210 inserted, still are. Note that it isn't guaranteed that
2211 we'll see this when a shared library is loaded, and nor will
2212 we see this for unloads (although breakpoints in unloaded
2213 libraries shouldn't trigger), as GDB may not find symbols for
2214 the library at all. We also re-validate breakpoints when we
2215 see a second GDB breakpoint for the same address, and or when
2216 we access breakpoint shadows. */
2217 validate_breakpoints ();
2219 if (target_supports_tracepoints ())
2220 tracepoint_look_up_symbols ();
2222 if (current_thread
!= NULL
&& the_target
->look_up_symbols
!= NULL
)
2223 (*the_target
->look_up_symbols
) ();
2225 current_thread
= save_thread
;
2227 strcpy (own_buf
, "OK");
2231 if (!disable_packet_qfThreadInfo
)
2233 if (strcmp ("qfThreadInfo", own_buf
) == 0)
2235 require_running_or_return (own_buf
);
2236 thread_iter
= all_threads
.begin ();
2239 ptid_t ptid
= (*thread_iter
)->id
;
2240 write_ptid (own_buf
, ptid
);
2245 if (strcmp ("qsThreadInfo", own_buf
) == 0)
2247 require_running_or_return (own_buf
);
2248 if (thread_iter
!= all_threads
.end ())
2251 ptid_t ptid
= (*thread_iter
)->id
;
2252 write_ptid (own_buf
, ptid
);
2258 sprintf (own_buf
, "l");
2264 if (the_target
->read_offsets
!= NULL
2265 && strcmp ("qOffsets", own_buf
) == 0)
2267 CORE_ADDR text
, data
;
2269 require_running_or_return (own_buf
);
2270 if (the_target
->read_offsets (&text
, &data
))
2271 sprintf (own_buf
, "Text=%lX;Data=%lX;Bss=%lX",
2272 (long)text
, (long)data
, (long)data
);
2274 write_enn (own_buf
);
2279 /* Protocol features query. */
2280 if (startswith (own_buf
, "qSupported")
2281 && (own_buf
[10] == ':' || own_buf
[10] == '\0'))
2283 char *p
= &own_buf
[10];
2284 int gdb_supports_qRelocInsn
= 0;
2286 /* Process each feature being provided by GDB. The first
2287 feature will follow a ':', and latter features will follow
2291 char **qsupported
= NULL
;
2296 /* Two passes, to avoid nested strtok calls in
2297 target_process_qsupported. */
2298 for (p
= strtok (p
+ 1, ";");
2300 p
= strtok (NULL
, ";"))
2303 qsupported
= XRESIZEVEC (char *, qsupported
, count
);
2304 qsupported
[count
- 1] = xstrdup (p
);
2307 for (i
= 0; i
< count
; i
++)
2310 if (strcmp (p
, "multiprocess+") == 0)
2312 /* GDB supports and wants multi-process support if
2314 if (target_supports_multi_process ())
2317 else if (strcmp (p
, "qRelocInsn+") == 0)
2319 /* GDB supports relocate instruction requests. */
2320 gdb_supports_qRelocInsn
= 1;
2322 else if (strcmp (p
, "swbreak+") == 0)
2324 /* GDB wants us to report whether a trap is caused
2325 by a software breakpoint and for us to handle PC
2326 adjustment if necessary on this target. */
2327 if (target_supports_stopped_by_sw_breakpoint ())
2328 swbreak_feature
= 1;
2330 else if (strcmp (p
, "hwbreak+") == 0)
2332 /* GDB wants us to report whether a trap is caused
2333 by a hardware breakpoint. */
2334 if (target_supports_stopped_by_hw_breakpoint ())
2335 hwbreak_feature
= 1;
2337 else if (strcmp (p
, "fork-events+") == 0)
2339 /* GDB supports and wants fork events if possible. */
2340 if (target_supports_fork_events ())
2341 report_fork_events
= 1;
2343 else if (strcmp (p
, "vfork-events+") == 0)
2345 /* GDB supports and wants vfork events if possible. */
2346 if (target_supports_vfork_events ())
2347 report_vfork_events
= 1;
2349 else if (strcmp (p
, "exec-events+") == 0)
2351 /* GDB supports and wants exec events if possible. */
2352 if (target_supports_exec_events ())
2353 report_exec_events
= 1;
2355 else if (strcmp (p
, "vContSupported+") == 0)
2356 vCont_supported
= 1;
2357 else if (strcmp (p
, "QThreadEvents+") == 0)
2359 else if (strcmp (p
, "no-resumed+") == 0)
2361 /* GDB supports and wants TARGET_WAITKIND_NO_RESUMED
2363 report_no_resumed
= 1;
2367 /* Move the unknown features all together. */
2368 qsupported
[i
] = NULL
;
2369 qsupported
[unknown
] = p
;
2374 /* Give the target backend a chance to process the unknown
2376 target_process_qsupported (qsupported
, unknown
);
2378 for (i
= 0; i
< count
; i
++)
2379 free (qsupported
[i
]);
2384 "PacketSize=%x;QPassSignals+;QProgramSignals+;"
2385 "QStartupWithShell+;QEnvironmentHexEncoded+;"
2386 "QEnvironmentReset+;QEnvironmentUnset+;"
2390 if (target_supports_catch_syscall ())
2391 strcat (own_buf
, ";QCatchSyscalls+");
2393 if (the_target
->qxfer_libraries_svr4
!= NULL
)
2394 strcat (own_buf
, ";qXfer:libraries-svr4:read+"
2395 ";augmented-libraries-svr4-read+");
2398 /* We do not have any hook to indicate whether the non-SVR4 target
2399 backend supports qXfer:libraries:read, so always report it. */
2400 strcat (own_buf
, ";qXfer:libraries:read+");
2403 if (the_target
->read_auxv
!= NULL
)
2404 strcat (own_buf
, ";qXfer:auxv:read+");
2406 if (the_target
->qxfer_spu
!= NULL
)
2407 strcat (own_buf
, ";qXfer:spu:read+;qXfer:spu:write+");
2409 if (the_target
->qxfer_siginfo
!= NULL
)
2410 strcat (own_buf
, ";qXfer:siginfo:read+;qXfer:siginfo:write+");
2412 if (the_target
->read_loadmap
!= NULL
)
2413 strcat (own_buf
, ";qXfer:fdpic:read+");
2415 /* We always report qXfer:features:read, as targets may
2416 install XML files on a subsequent call to arch_setup.
2417 If we reported to GDB on startup that we don't support
2418 qXfer:feature:read at all, we will never be re-queried. */
2419 strcat (own_buf
, ";qXfer:features:read+");
2421 if (transport_is_reliable
)
2422 strcat (own_buf
, ";QStartNoAckMode+");
2424 if (the_target
->qxfer_osdata
!= NULL
)
2425 strcat (own_buf
, ";qXfer:osdata:read+");
2427 if (target_supports_multi_process ())
2428 strcat (own_buf
, ";multiprocess+");
2430 if (target_supports_fork_events ())
2431 strcat (own_buf
, ";fork-events+");
2433 if (target_supports_vfork_events ())
2434 strcat (own_buf
, ";vfork-events+");
2436 if (target_supports_exec_events ())
2437 strcat (own_buf
, ";exec-events+");
2439 if (target_supports_non_stop ())
2440 strcat (own_buf
, ";QNonStop+");
2442 if (target_supports_disable_randomization ())
2443 strcat (own_buf
, ";QDisableRandomization+");
2445 strcat (own_buf
, ";qXfer:threads:read+");
2447 if (target_supports_tracepoints ())
2449 strcat (own_buf
, ";ConditionalTracepoints+");
2450 strcat (own_buf
, ";TraceStateVariables+");
2451 strcat (own_buf
, ";TracepointSource+");
2452 strcat (own_buf
, ";DisconnectedTracing+");
2453 if (gdb_supports_qRelocInsn
&& target_supports_fast_tracepoints ())
2454 strcat (own_buf
, ";FastTracepoints+");
2455 strcat (own_buf
, ";StaticTracepoints+");
2456 strcat (own_buf
, ";InstallInTrace+");
2457 strcat (own_buf
, ";qXfer:statictrace:read+");
2458 strcat (own_buf
, ";qXfer:traceframe-info:read+");
2459 strcat (own_buf
, ";EnableDisableTracepoints+");
2460 strcat (own_buf
, ";QTBuffer:size+");
2461 strcat (own_buf
, ";tracenz+");
2464 if (target_supports_hardware_single_step ()
2465 || target_supports_software_single_step () )
2467 strcat (own_buf
, ";ConditionalBreakpoints+");
2469 strcat (own_buf
, ";BreakpointCommands+");
2471 if (target_supports_agent ())
2472 strcat (own_buf
, ";QAgent+");
2474 supported_btrace_packets (own_buf
);
2476 if (target_supports_stopped_by_sw_breakpoint ())
2477 strcat (own_buf
, ";swbreak+");
2479 if (target_supports_stopped_by_hw_breakpoint ())
2480 strcat (own_buf
, ";hwbreak+");
2482 if (the_target
->pid_to_exec_file
!= NULL
)
2483 strcat (own_buf
, ";qXfer:exec-file:read+");
2485 strcat (own_buf
, ";vContSupported+");
2487 strcat (own_buf
, ";QThreadEvents+");
2489 strcat (own_buf
, ";no-resumed+");
2491 /* Reinitialize components as needed for the new connection. */
2492 hostio_handle_new_gdb_connection ();
2493 target_handle_new_gdb_connection ();
2498 /* Thread-local storage support. */
2499 if (the_target
->get_tls_address
!= NULL
2500 && startswith (own_buf
, "qGetTLSAddr:"))
2502 char *p
= own_buf
+ 12;
2503 CORE_ADDR parts
[2], address
= 0;
2505 ptid_t ptid
= null_ptid
;
2507 require_running_or_return (own_buf
);
2509 for (i
= 0; i
< 3; i
++)
2517 p2
= strchr (p
, ',');
2530 ptid
= read_ptid (p
, NULL
);
2532 decode_address (&parts
[i
- 1], p
, len
);
2536 if (p
!= NULL
|| i
< 3)
2540 struct thread_info
*thread
= find_thread_ptid (ptid
);
2545 err
= the_target
->get_tls_address (thread
, parts
[0], parts
[1],
2551 strcpy (own_buf
, paddress(address
));
2556 write_enn (own_buf
);
2560 /* Otherwise, pretend we do not understand this packet. */
2563 /* Windows OS Thread Information Block address support. */
2564 if (the_target
->get_tib_address
!= NULL
2565 && startswith (own_buf
, "qGetTIBAddr:"))
2570 ptid_t ptid
= read_ptid (own_buf
+ 12, &annex
);
2572 n
= (*the_target
->get_tib_address
) (ptid
, &tlb
);
2575 strcpy (own_buf
, paddress(tlb
));
2580 write_enn (own_buf
);
2586 /* Handle "monitor" commands. */
2587 if (startswith (own_buf
, "qRcmd,"))
2589 char *mon
= (char *) malloc (PBUFSIZ
);
2590 int len
= strlen (own_buf
+ 6);
2594 write_enn (own_buf
);
2599 || hex2bin (own_buf
+ 6, (gdb_byte
*) mon
, len
/ 2) != len
/ 2)
2601 write_enn (own_buf
);
2605 mon
[len
/ 2] = '\0';
2609 if (the_target
->handle_monitor_command
== NULL
2610 || (*the_target
->handle_monitor_command
) (mon
) == 0)
2611 /* Default processing. */
2612 handle_monitor_command (mon
, own_buf
);
2618 if (startswith (own_buf
, "qSearch:memory:"))
2620 require_running_or_return (own_buf
);
2621 handle_search_memory (own_buf
, packet_len
);
2625 if (strcmp (own_buf
, "qAttached") == 0
2626 || startswith (own_buf
, "qAttached:"))
2628 struct process_info
*process
;
2630 if (own_buf
[sizeof ("qAttached") - 1])
2632 int pid
= strtoul (own_buf
+ sizeof ("qAttached:") - 1, NULL
, 16);
2633 process
= find_process_pid (pid
);
2637 require_running_or_return (own_buf
);
2638 process
= current_process ();
2641 if (process
== NULL
)
2643 write_enn (own_buf
);
2647 strcpy (own_buf
, process
->attached
? "1" : "0");
2651 if (startswith (own_buf
, "qCRC:"))
2653 /* CRC check (compare-section). */
2657 unsigned long long crc
;
2659 require_running_or_return (own_buf
);
2660 comma
= unpack_varlen_hex (own_buf
+ 5, &base
);
2661 if (*comma
++ != ',')
2663 write_enn (own_buf
);
2666 len
= strtoul (comma
, NULL
, 16);
2667 crc
= crc32 (base
, len
, 0xffffffff);
2668 /* Check for memory failure. */
2669 if (crc
== (unsigned long long) -1)
2671 write_enn (own_buf
);
2674 sprintf (own_buf
, "C%lx", (unsigned long) crc
);
2678 if (handle_qxfer (own_buf
, packet_len
, new_packet_len_p
))
2681 if (target_supports_tracepoints () && handle_tracepoint_query (own_buf
))
2684 /* Otherwise we didn't know what packet it was. Say we didn't
2689 static void gdb_wants_all_threads_stopped (void);
2690 static void resume (struct thread_resume
*actions
, size_t n
);
2692 /* The callback that is passed to visit_actioned_threads. */
2693 typedef int (visit_actioned_threads_callback_ftype
)
2694 (const struct thread_resume
*, struct thread_info
*);
2696 /* Call CALLBACK for any thread to which ACTIONS applies to. Returns
2697 true if CALLBACK returns true. Returns false if no matching thread
2698 is found or CALLBACK results false.
2699 Note: This function is itself a callback for find_thread. */
2702 visit_actioned_threads (thread_info
*thread
,
2703 const struct thread_resume
*actions
,
2705 visit_actioned_threads_callback_ftype
*callback
)
2707 for (size_t i
= 0; i
< num_actions
; i
++)
2709 const struct thread_resume
*action
= &actions
[i
];
2711 if (ptid_equal (action
->thread
, minus_one_ptid
)
2712 || ptid_equal (action
->thread
, thread
->id
)
2713 || ((ptid_get_pid (action
->thread
)
2714 == thread
->id
.pid ())
2715 && ptid_get_lwp (action
->thread
) == -1))
2717 if ((*callback
) (action
, thread
))
2725 /* Callback for visit_actioned_threads. If the thread has a pending
2726 status to report, report it now. */
2729 handle_pending_status (const struct thread_resume
*resumption
,
2730 struct thread_info
*thread
)
2732 if (thread
->status_pending_p
)
2734 thread
->status_pending_p
= 0;
2736 last_status
= thread
->last_status
;
2737 last_ptid
= thread
->id
;
2738 prepare_resume_reply (own_buf
, last_ptid
, &last_status
);
2744 /* Parse vCont packets. */
2746 handle_v_cont (char *own_buf
)
2750 struct thread_resume
*resume_info
;
2751 struct thread_resume default_action
{ null_ptid
};
2753 /* Count the number of semicolons in the packet. There should be one
2754 for every action. */
2760 p
= strchr (p
, ';');
2763 resume_info
= (struct thread_resume
*) malloc (n
* sizeof (resume_info
[0]));
2764 if (resume_info
== NULL
)
2772 memset (&resume_info
[i
], 0, sizeof resume_info
[i
]);
2774 if (p
[0] == 's' || p
[0] == 'S')
2775 resume_info
[i
].kind
= resume_step
;
2776 else if (p
[0] == 'r')
2777 resume_info
[i
].kind
= resume_step
;
2778 else if (p
[0] == 'c' || p
[0] == 'C')
2779 resume_info
[i
].kind
= resume_continue
;
2780 else if (p
[0] == 't')
2781 resume_info
[i
].kind
= resume_stop
;
2785 if (p
[0] == 'S' || p
[0] == 'C')
2788 int sig
= strtol (p
+ 1, &q
, 16);
2793 if (!gdb_signal_to_host_p ((enum gdb_signal
) sig
))
2795 resume_info
[i
].sig
= gdb_signal_to_host ((enum gdb_signal
) sig
);
2797 else if (p
[0] == 'r')
2801 p
= unpack_varlen_hex (p
+ 1, &addr
);
2802 resume_info
[i
].step_range_start
= addr
;
2807 p
= unpack_varlen_hex (p
+ 1, &addr
);
2808 resume_info
[i
].step_range_end
= addr
;
2817 resume_info
[i
].thread
= minus_one_ptid
;
2818 default_action
= resume_info
[i
];
2820 /* Note: we don't increment i here, we'll overwrite this entry
2821 the next time through. */
2823 else if (p
[0] == ':')
2826 ptid_t ptid
= read_ptid (p
+ 1, &q
);
2831 if (p
[0] != ';' && p
[0] != 0)
2834 resume_info
[i
].thread
= ptid
;
2841 resume_info
[i
] = default_action
;
2843 resume (resume_info
, n
);
2848 write_enn (own_buf
);
2853 /* Resume target with ACTIONS, an array of NUM_ACTIONS elements. */
2856 resume (struct thread_resume
*actions
, size_t num_actions
)
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
);
2883 last_ptid
= mywait (minus_one_ptid
, &last_status
, 0, 1);
2885 if (last_status
.kind
== TARGET_WAITKIND_NO_RESUMED
2886 && !report_no_resumed
)
2888 /* The client does not support this stop reply. At least
2890 sprintf (own_buf
, "E.No unwaited-for children left.");
2891 disable_async_io ();
2895 if (last_status
.kind
!= TARGET_WAITKIND_EXITED
2896 && last_status
.kind
!= TARGET_WAITKIND_SIGNALLED
2897 && last_status
.kind
!= TARGET_WAITKIND_NO_RESUMED
)
2898 current_thread
->last_status
= 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 (own_buf
, last_ptid
, &last_status
);
2906 disable_async_io ();
2908 if (last_status
.kind
== TARGET_WAITKIND_EXITED
2909 || last_status
.kind
== TARGET_WAITKIND_SIGNALLED
)
2910 target_mourn_inferior (last_ptid
);
2914 /* Attach to a new program. Return 1 if successful, 0 if failure. */
2916 handle_v_attach (char *own_buf
)
2920 pid
= strtol (own_buf
+ 8, NULL
, 16);
2921 if (pid
!= 0 && attach_inferior (pid
) == 0)
2923 /* Don't report shared library events after attaching, even if
2924 some libraries are preloaded. GDB will always poll the
2925 library list. Avoids the "stopped by shared library event"
2926 notice on the GDB side. */
2931 /* In non-stop, we don't send a resume reply. Stop events
2932 will follow up using the normal notification
2937 prepare_resume_reply (own_buf
, last_ptid
, &last_status
);
2943 write_enn (own_buf
);
2948 /* Run a new program. Return 1 if successful, 0 if failure. */
2950 handle_v_run (char *own_buf
)
2953 std::vector
<char *> new_argv
;
2954 char *new_program_name
= NULL
;
2958 for (p
= own_buf
+ strlen ("vRun;"); p
&& *p
; p
= strchr (p
, ';'))
2964 for (i
= 0, p
= own_buf
+ strlen ("vRun;"); *p
; p
= next_p
, ++i
)
2966 next_p
= strchr (p
, ';');
2968 next_p
= p
+ strlen (p
);
2970 if (i
== 0 && p
== next_p
)
2972 /* No program specified. */
2973 new_program_name
= NULL
;
2975 else if (p
== next_p
)
2977 /* Empty argument. */
2978 new_argv
.push_back (xstrdup ("''"));
2982 size_t len
= (next_p
- p
) / 2;
2983 /* ARG is the unquoted argument received via the RSP. */
2984 char *arg
= (char *) xmalloc (len
+ 1);
2985 /* FULL_ARGS will contain the quoted version of ARG. */
2986 char *full_arg
= (char *) xmalloc ((len
+ 1) * 2);
2987 /* These are pointers used to navigate the strings above. */
2988 char *tmp_arg
= arg
;
2989 char *tmp_full_arg
= full_arg
;
2992 hex2bin (p
, (gdb_byte
*) arg
, len
);
2995 while (*tmp_arg
!= '\0')
3001 *tmp_full_arg
= '\'';
3007 /* Quote single quote. */
3008 *tmp_full_arg
= '\\';
3016 *tmp_full_arg
= *tmp_arg
;
3022 *tmp_full_arg
++ = '\'';
3024 /* Finish FULL_ARG and push it into the vector containing
3026 *tmp_full_arg
= '\0';
3028 new_program_name
= full_arg
;
3030 new_argv
.push_back (full_arg
);
3036 new_argv
.push_back (NULL
);
3038 if (new_program_name
== NULL
)
3040 /* GDB didn't specify a program to run. Use the program from the
3041 last run with the new argument list. */
3042 if (program_path
.get () == NULL
)
3044 write_enn (own_buf
);
3045 free_vector_argv (new_argv
);
3050 program_path
.set (gdb::unique_xmalloc_ptr
<char> (new_program_name
));
3052 /* Free the old argv and install the new one. */
3053 free_vector_argv (program_args
);
3054 program_args
= new_argv
;
3056 create_inferior (program_path
.get (), program_args
);
3058 if (last_status
.kind
== TARGET_WAITKIND_STOPPED
)
3060 prepare_resume_reply (own_buf
, last_ptid
, &last_status
);
3062 /* In non-stop, sending a resume reply doesn't set the general
3063 thread, but GDB assumes a vRun sets it (this is so GDB can
3064 query which is the main thread of the new inferior. */
3066 general_thread
= last_ptid
;
3072 write_enn (own_buf
);
3077 /* Kill process. Return 1 if successful, 0 if failure. */
3079 handle_v_kill (char *own_buf
)
3082 char *p
= &own_buf
[6];
3084 pid
= strtol (p
, NULL
, 16);
3087 if (pid
!= 0 && kill_inferior (pid
) == 0)
3089 last_status
.kind
= TARGET_WAITKIND_SIGNALLED
;
3090 last_status
.value
.sig
= GDB_SIGNAL_KILL
;
3091 last_ptid
= pid_to_ptid (pid
);
3092 discard_queued_stop_replies (last_ptid
);
3098 write_enn (own_buf
);
3103 /* Handle all of the extended 'v' packets. */
3105 handle_v_requests (char *own_buf
, int packet_len
, int *new_packet_len
)
3107 if (!disable_packet_vCont
)
3109 if (strcmp (own_buf
, "vCtrlC") == 0)
3111 (*the_target
->request_interrupt
) ();
3116 if (startswith (own_buf
, "vCont;"))
3118 handle_v_cont (own_buf
);
3122 if (startswith (own_buf
, "vCont?"))
3124 strcpy (own_buf
, "vCont;c;C;t");
3126 if (target_supports_hardware_single_step ()
3127 || target_supports_software_single_step ()
3128 || !vCont_supported
)
3130 /* If target supports single step either by hardware or by
3131 software, add actions s and S to the list of supported
3132 actions. On the other hand, if GDB doesn't request the
3133 supported vCont actions in qSupported packet, add s and
3134 S to the list too. */
3135 own_buf
= own_buf
+ strlen (own_buf
);
3136 strcpy (own_buf
, ";s;S");
3139 if (target_supports_range_stepping ())
3141 own_buf
= own_buf
+ strlen (own_buf
);
3142 strcpy (own_buf
, ";r");
3148 if (startswith (own_buf
, "vFile:")
3149 && handle_vFile (own_buf
, packet_len
, new_packet_len
))
3152 if (startswith (own_buf
, "vAttach;"))
3154 if ((!extended_protocol
|| !multi_process
) && target_running ())
3156 fprintf (stderr
, "Already debugging a process\n");
3157 write_enn (own_buf
);
3160 handle_v_attach (own_buf
);
3164 if (startswith (own_buf
, "vRun;"))
3166 if ((!extended_protocol
|| !multi_process
) && target_running ())
3168 fprintf (stderr
, "Already debugging a process\n");
3169 write_enn (own_buf
);
3172 handle_v_run (own_buf
);
3176 if (startswith (own_buf
, "vKill;"))
3178 if (!target_running ())
3180 fprintf (stderr
, "No process to kill\n");
3181 write_enn (own_buf
);
3184 handle_v_kill (own_buf
);
3188 if (handle_notif_ack (own_buf
, packet_len
))
3191 /* Otherwise we didn't know what packet it was. Say we didn't
3197 /* Resume thread and wait for another event. In non-stop mode,
3198 don't really wait here, but return immediatelly to the event
3201 myresume (char *own_buf
, int step
, int sig
)
3203 struct thread_resume resume_info
[2];
3205 int valid_cont_thread
;
3207 valid_cont_thread
= (!ptid_equal (cont_thread
, null_ptid
)
3208 && !ptid_equal (cont_thread
, minus_one_ptid
));
3210 if (step
|| sig
|| valid_cont_thread
)
3212 resume_info
[0].thread
= current_ptid
;
3214 resume_info
[0].kind
= resume_step
;
3216 resume_info
[0].kind
= resume_continue
;
3217 resume_info
[0].sig
= sig
;
3221 if (!valid_cont_thread
)
3223 resume_info
[n
].thread
= minus_one_ptid
;
3224 resume_info
[n
].kind
= resume_continue
;
3225 resume_info
[n
].sig
= 0;
3229 resume (resume_info
, n
);
3232 /* Callback for for_each_thread. Make a new stop reply for each
3236 queue_stop_reply_callback (thread_info
*thread
)
3238 /* For now, assume targets that don't have this callback also don't
3239 manage the thread's last_status field. */
3240 if (the_target
->thread_stopped
== NULL
)
3242 struct vstop_notif
*new_notif
= XNEW (struct vstop_notif
);
3244 new_notif
->ptid
= thread
->id
;
3245 new_notif
->status
= thread
->last_status
;
3246 /* Pass the last stop reply back to GDB, but don't notify
3248 notif_event_enque (¬if_stop
,
3249 (struct notif_event
*) new_notif
);
3253 if (thread_stopped (thread
))
3257 std::string status_string
3258 = target_waitstatus_to_string (&thread
->last_status
);
3260 debug_printf ("Reporting thread %s as already stopped with %s\n",
3261 target_pid_to_str (thread
->id
),
3262 status_string
.c_str ());
3265 gdb_assert (thread
->last_status
.kind
!= TARGET_WAITKIND_IGNORE
);
3267 /* Pass the last stop reply back to GDB, but don't notify
3269 queue_stop_reply (thread
->id
, &thread
->last_status
);
3274 /* Set this inferior threads's state as "want-stopped". We won't
3275 resume this thread until the client gives us another action for
3279 gdb_wants_thread_stopped (thread_info
*thread
)
3281 thread
->last_resume_kind
= resume_stop
;
3283 if (thread
->last_status
.kind
== TARGET_WAITKIND_IGNORE
)
3285 /* Most threads are stopped implicitly (all-stop); tag that with
3287 thread
->last_status
.kind
= TARGET_WAITKIND_STOPPED
;
3288 thread
->last_status
.value
.sig
= GDB_SIGNAL_0
;
3292 /* Set all threads' states as "want-stopped". */
3295 gdb_wants_all_threads_stopped (void)
3297 for_each_thread (gdb_wants_thread_stopped
);
3300 /* Callback for for_each_thread. If the thread is stopped with an
3301 interesting event, mark it as having a pending event. */
3304 set_pending_status_callback (thread_info
*thread
)
3306 if (thread
->last_status
.kind
!= TARGET_WAITKIND_STOPPED
3307 || (thread
->last_status
.value
.sig
!= GDB_SIGNAL_0
3308 /* A breakpoint, watchpoint or finished step from a previous
3309 GDB run isn't considered interesting for a new GDB run.
3310 If we left those pending, the new GDB could consider them
3311 random SIGTRAPs. This leaves out real async traps. We'd
3312 have to peek into the (target-specific) siginfo to
3313 distinguish those. */
3314 && thread
->last_status
.value
.sig
!= GDB_SIGNAL_TRAP
))
3315 thread
->status_pending_p
= 1;
3318 /* Status handler for the '?' packet. */
3321 handle_status (char *own_buf
)
3323 /* GDB is connected, don't forward events to the target anymore. */
3324 for_each_process ([] (process_info
*process
) {
3325 process
->gdb_detached
= 0;
3328 /* In non-stop mode, we must send a stop reply for each stopped
3329 thread. In all-stop mode, just send one for the first stopped
3334 for_each_thread (queue_stop_reply_callback
);
3336 /* The first is sent immediatly. OK is sent if there is no
3337 stopped thread, which is the same handling of the vStopped
3338 packet (by design). */
3339 notif_write_event (¬if_stop
, own_buf
);
3343 thread_info
*thread
= NULL
;
3346 stabilize_threads ();
3347 gdb_wants_all_threads_stopped ();
3349 /* We can only report one status, but we might be coming out of
3350 non-stop -- if more than one thread is stopped with
3351 interesting events, leave events for the threads we're not
3352 reporting now pending. They'll be reported the next time the
3353 threads are resumed. Start by marking all interesting events
3355 for_each_thread (set_pending_status_callback
);
3357 /* Prefer the last thread that reported an event to GDB (even if
3358 that was a GDB_SIGNAL_TRAP). */
3359 if (last_status
.kind
!= TARGET_WAITKIND_IGNORE
3360 && last_status
.kind
!= TARGET_WAITKIND_EXITED
3361 && last_status
.kind
!= TARGET_WAITKIND_SIGNALLED
)
3362 thread
= find_thread_ptid (last_ptid
);
3364 /* If the last event thread is not found for some reason, look
3365 for some other thread that might have an event to report. */
3367 thread
= find_thread ([] (thread_info
*thread
)
3369 return thread
->status_pending_p
;
3372 /* If we're still out of luck, simply pick the first thread in
3375 thread
= get_first_thread ();
3379 struct thread_info
*tp
= (struct thread_info
*) thread
;
3381 /* We're reporting this event, so it's no longer
3383 tp
->status_pending_p
= 0;
3385 /* GDB assumes the current thread is the thread we're
3386 reporting the status for. */
3387 general_thread
= thread
->id
;
3388 set_desired_thread ();
3390 gdb_assert (tp
->last_status
.kind
!= TARGET_WAITKIND_IGNORE
);
3391 prepare_resume_reply (own_buf
, tp
->id
, &tp
->last_status
);
3394 strcpy (own_buf
, "W00");
3399 gdbserver_version (void)
3401 printf ("GNU gdbserver %s%s\n"
3402 "Copyright (C) 2018 Free Software Foundation, Inc.\n"
3403 "gdbserver is free software, covered by the "
3404 "GNU General Public License.\n"
3405 "This gdbserver was configured as \"%s\"\n",
3406 PKGVERSION
, version
, host_name
);
3410 gdbserver_usage (FILE *stream
)
3412 fprintf (stream
, "Usage:\tgdbserver [OPTIONS] COMM PROG [ARGS ...]\n"
3413 "\tgdbserver [OPTIONS] --attach COMM PID\n"
3414 "\tgdbserver [OPTIONS] --multi COMM\n"
3416 "COMM may either be a tty device (for serial debugging),\n"
3417 "HOST:PORT to listen for a TCP connection, or '-' or 'stdio' to use \n"
3418 "stdin/stdout of gdbserver.\n"
3419 "PROG is the executable program. ARGS are arguments passed to inferior.\n"
3420 "PID is the process ID to attach to, when --attach is specified.\n"
3422 "Operating modes:\n"
3424 " --attach Attach to running process PID.\n"
3425 " --multi Start server without a specific program, and\n"
3426 " only quit when explicitly commanded.\n"
3427 " --once Exit after the first connection has closed.\n"
3428 " --help Print this message and then exit.\n"
3429 " --version Display version information and exit.\n"
3433 " --wrapper WRAPPER -- Run WRAPPER to start new programs.\n"
3434 " --disable-randomization\n"
3435 " Run PROG with address space randomization disabled.\n"
3436 " --no-disable-randomization\n"
3437 " Don't disable address space randomization when\n"
3439 " --startup-with-shell\n"
3440 " Start PROG using a shell. I.e., execs a shell that\n"
3441 " then execs PROG. (default)\n"
3442 " --no-startup-with-shell\n"
3443 " Exec PROG directly instead of using a shell.\n"
3444 " Disables argument globbing and variable substitution\n"
3445 " on UNIX-like systems.\n"
3449 " --debug Enable general debugging output.\n"
3450 " --debug-format=opt1[,opt2,...]\n"
3451 " Specify extra content in debugging output.\n"
3456 " --remote-debug Enable remote protocol debugging output.\n"
3457 " --disable-packet=opt1[,opt2,...]\n"
3458 " Disable support for RSP packets or features.\n"
3460 " vCont, Tthread, qC, qfThreadInfo and \n"
3461 " threads (disable all threading packets).\n"
3463 "For more information, consult the GDB manual (available as on-line \n"
3464 "info or a printed manual).\n");
3465 if (REPORT_BUGS_TO
[0] && stream
== stdout
)
3466 fprintf (stream
, "Report bugs to \"%s\".\n", REPORT_BUGS_TO
);
3470 gdbserver_show_disableable (FILE *stream
)
3472 fprintf (stream
, "Disableable packets:\n"
3473 " vCont \tAll vCont packets\n"
3474 " qC \tQuerying the current thread\n"
3475 " qfThreadInfo\tThread listing\n"
3476 " Tthread \tPassing the thread specifier in the "
3477 "T stop reply packet\n"
3478 " threads \tAll of the above\n");
3482 kill_inferior_callback (process_info
*process
)
3484 int pid
= process
->pid
;
3486 kill_inferior (pid
);
3487 discard_queued_stop_replies (pid_to_ptid (pid
));
3490 /* Call this when exiting gdbserver with possible inferiors that need
3491 to be killed or detached from. */
3494 detach_or_kill_for_exit (void)
3496 /* First print a list of the inferiors we will be killing/detaching.
3497 This is to assist the user, for example, in case the inferior unexpectedly
3498 dies after we exit: did we screw up or did the inferior exit on its own?
3499 Having this info will save some head-scratching. */
3501 if (have_started_inferiors_p ())
3503 fprintf (stderr
, "Killing process(es):");
3505 for_each_process ([] (process_info
*process
) {
3506 if (!process
->attached
)
3507 fprintf (stderr
, " %d", process
->pid
);
3510 fprintf (stderr
, "\n");
3512 if (have_attached_inferiors_p ())
3514 fprintf (stderr
, "Detaching process(es):");
3516 for_each_process ([] (process_info
*process
) {
3517 if (process
->attached
)
3518 fprintf (stderr
, " %d", process
->pid
);
3521 fprintf (stderr
, "\n");
3524 /* Now we can kill or detach the inferiors. */
3525 for_each_process ([] (process_info
*process
) {
3526 int pid
= process
->pid
;
3528 if (process
->attached
)
3529 detach_inferior (pid
);
3531 kill_inferior (pid
);
3533 discard_queued_stop_replies (pid_to_ptid (pid
));
3537 /* Value that will be passed to exit(3) when gdbserver exits. */
3538 static int exit_code
;
3540 /* Cleanup version of detach_or_kill_for_exit. */
3543 detach_or_kill_for_exit_cleanup (void *ignore
)
3548 detach_or_kill_for_exit ();
3551 CATCH (exception
, RETURN_MASK_ALL
)
3554 fprintf (stderr
, "Detach or kill failed: %s\n", exception
.message
);
3560 /* Main function. This is called by the real "main" function,
3561 wrapped in a TRY_CATCH that handles any uncaught exceptions. */
3563 static void ATTRIBUTE_NORETURN
3564 captured_main (int argc
, char *argv
[])
3569 const char *port
= NULL
;
3570 char **next_arg
= &argv
[1];
3571 volatile int multi_mode
= 0;
3572 volatile int attach
= 0;
3574 bool selftest
= false;
3576 const char *selftest_filter
= NULL
;
3579 current_directory
= getcwd (NULL
, 0);
3580 if (current_directory
== NULL
)
3582 error (_("Could not find current working directory: %s"),
3583 safe_strerror (errno
));
3586 while (*next_arg
!= NULL
&& **next_arg
== '-')
3588 if (strcmp (*next_arg
, "--version") == 0)
3590 gdbserver_version ();
3593 else if (strcmp (*next_arg
, "--help") == 0)
3595 gdbserver_usage (stdout
);
3598 else if (strcmp (*next_arg
, "--attach") == 0)
3600 else if (strcmp (*next_arg
, "--multi") == 0)
3602 else if (strcmp (*next_arg
, "--wrapper") == 0)
3609 while (*next_arg
!= NULL
&& strcmp (*next_arg
, "--") != 0)
3611 wrapper_argv
+= *next_arg
;
3612 wrapper_argv
+= ' ';
3616 if (!wrapper_argv
.empty ())
3618 /* Erase the last whitespace. */
3619 wrapper_argv
.erase (wrapper_argv
.end () - 1);
3622 if (next_arg
== tmp
|| *next_arg
== NULL
)
3624 gdbserver_usage (stderr
);
3628 /* Consume the "--". */
3631 else if (strcmp (*next_arg
, "--debug") == 0)
3633 else if (startswith (*next_arg
, "--debug-format="))
3635 std::string error_msg
3636 = parse_debug_format_options ((*next_arg
)
3637 + sizeof ("--debug-format=") - 1, 0);
3639 if (!error_msg
.empty ())
3641 fprintf (stderr
, "%s", error_msg
.c_str ());
3645 else if (strcmp (*next_arg
, "--remote-debug") == 0)
3647 else if (strcmp (*next_arg
, "--disable-packet") == 0)
3649 gdbserver_show_disableable (stdout
);
3652 else if (startswith (*next_arg
, "--disable-packet="))
3654 char *packets
, *tok
;
3656 packets
= *next_arg
+= sizeof ("--disable-packet=") - 1;
3657 for (tok
= strtok (packets
, ",");
3659 tok
= strtok (NULL
, ","))
3661 if (strcmp ("vCont", tok
) == 0)
3662 disable_packet_vCont
= 1;
3663 else if (strcmp ("Tthread", tok
) == 0)
3664 disable_packet_Tthread
= 1;
3665 else if (strcmp ("qC", tok
) == 0)
3666 disable_packet_qC
= 1;
3667 else if (strcmp ("qfThreadInfo", tok
) == 0)
3668 disable_packet_qfThreadInfo
= 1;
3669 else if (strcmp ("threads", tok
) == 0)
3671 disable_packet_vCont
= 1;
3672 disable_packet_Tthread
= 1;
3673 disable_packet_qC
= 1;
3674 disable_packet_qfThreadInfo
= 1;
3678 fprintf (stderr
, "Don't know how to disable \"%s\".\n\n",
3680 gdbserver_show_disableable (stderr
);
3685 else if (strcmp (*next_arg
, "-") == 0)
3687 /* "-" specifies a stdio connection and is a form of port
3689 port
= STDIO_CONNECTION_NAME
;
3693 else if (strcmp (*next_arg
, "--disable-randomization") == 0)
3694 disable_randomization
= 1;
3695 else if (strcmp (*next_arg
, "--no-disable-randomization") == 0)
3696 disable_randomization
= 0;
3697 else if (strcmp (*next_arg
, "--startup-with-shell") == 0)
3698 startup_with_shell
= true;
3699 else if (strcmp (*next_arg
, "--no-startup-with-shell") == 0)
3700 startup_with_shell
= false;
3701 else if (strcmp (*next_arg
, "--once") == 0)
3703 else if (strcmp (*next_arg
, "--selftest") == 0)
3705 else if (startswith (*next_arg
, "--selftest="))
3709 selftest_filter
= *next_arg
+ strlen ("--selftest=");
3714 fprintf (stderr
, "Unknown argument: %s\n", *next_arg
);
3727 if ((port
== NULL
|| (!attach
&& !multi_mode
&& *next_arg
== NULL
))
3730 gdbserver_usage (stderr
);
3734 /* Remember stdio descriptors. LISTEN_DESC must not be listed, it will be
3735 opened by remote_prepare. */
3738 save_original_signals_state (false);
3740 /* We need to know whether the remote connection is stdio before
3741 starting the inferior. Inferiors created in this scenario have
3742 stdin,stdout redirected. So do this here before we call
3745 remote_prepare (port
);
3750 /* --attach used to come after PORT, so allow it there for
3752 if (*next_arg
!= NULL
&& strcmp (*next_arg
, "--attach") == 0)
3759 && (*next_arg
== NULL
3760 || (*next_arg
)[0] == '\0'
3761 || (pid
= strtoul (*next_arg
, &arg_end
, 0)) == 0
3763 || next_arg
[1] != NULL
))
3768 gdbserver_usage (stderr
);
3772 /* Gather information about the environment. */
3773 our_environ
= gdb_environ::from_host_environ ();
3775 initialize_async_io ();
3777 have_job_control ();
3778 initialize_event_loop ();
3779 if (target_supports_tracepoints ())
3780 initialize_tracepoint ();
3781 initialize_notif ();
3783 own_buf
= (char *) xmalloc (PBUFSIZ
+ 1);
3784 mem_buf
= (unsigned char *) xmalloc (PBUFSIZ
);
3789 selftests::run_tests (selftest_filter
);
3791 printf (_("Selftests are not available in a non-development build.\n"));
3793 throw_quit ("Quit");
3796 if (pid
== 0 && *next_arg
!= NULL
)
3800 n
= argc
- (next_arg
- argv
);
3801 program_path
.set (gdb::unique_xmalloc_ptr
<char> (xstrdup (next_arg
[0])));
3802 for (i
= 1; i
< n
; i
++)
3803 program_args
.push_back (xstrdup (next_arg
[i
]));
3804 program_args
.push_back (NULL
);
3806 /* Wait till we are at first instruction in program. */
3807 create_inferior (program_path
.get (), program_args
);
3809 /* We are now (hopefully) stopped at the first instruction of
3810 the target process. This assumes that the target process was
3811 successfully created. */
3815 if (attach_inferior (pid
) == -1)
3816 error ("Attaching not supported on this target");
3818 /* Otherwise succeeded. */
3822 last_status
.kind
= TARGET_WAITKIND_EXITED
;
3823 last_status
.value
.integer
= 0;
3824 last_ptid
= minus_one_ptid
;
3826 make_cleanup (detach_or_kill_for_exit_cleanup
, NULL
);
3828 /* Don't report shared library events on the initial connection,
3829 even if some libraries are preloaded. Avoids the "stopped by
3830 shared library event" notice on gdb side. */
3833 if (last_status
.kind
== TARGET_WAITKIND_EXITED
3834 || last_status
.kind
== TARGET_WAITKIND_SIGNALLED
)
3839 if (!was_running
&& !multi_mode
)
3840 error ("No program to debug");
3847 report_fork_events
= 0;
3848 report_vfork_events
= 0;
3849 report_exec_events
= 0;
3850 /* Be sure we're out of tfind mode. */
3851 current_traceframe
= -1;
3852 cont_thread
= null_ptid
;
3853 swbreak_feature
= 0;
3854 hwbreak_feature
= 0;
3855 vCont_supported
= 0;
3861 /* Wait for events. This will return when all event sources
3862 are removed from the event loop. */
3863 start_event_loop ();
3865 /* If an exit was requested (using the "monitor exit"
3866 command), terminate now. */
3868 throw_quit ("Quit");
3870 /* The only other way to get here is for getpkt to fail:
3872 - If --once was specified, we're done.
3874 - If not in extended-remote mode, and we're no longer
3875 debugging anything, simply exit: GDB has disconnected
3876 after processing the last process exit.
3878 - Otherwise, close the connection and reopen it at the
3880 if (run_once
|| (!extended_protocol
&& !target_running ()))
3881 throw_quit ("Quit");
3884 "Remote side has terminated connection. "
3885 "GDBserver will reopen the connection.\n");
3887 /* Get rid of any pending statuses. An eventual reconnection
3888 (by the same GDB instance or another) will refresh all its
3889 state from scratch. */
3890 discard_queued_stop_replies (minus_one_ptid
);
3891 for_each_thread ([] (thread_info
*thread
)
3893 thread
->status_pending_p
= 0;
3898 if (disconnected_tracing
)
3900 /* Try to enable non-stop/async mode, so we we can
3901 both wait for an async socket accept, and handle
3902 async target events simultaneously. There's also
3903 no point either in having the target always stop
3904 all threads, when we're going to pass signals
3905 down without informing GDB. */
3908 if (start_non_stop (1))
3911 /* Detaching implicitly resumes all threads;
3912 simply disconnecting does not. */
3918 "Disconnected tracing disabled; "
3919 "stopping trace run.\n");
3924 CATCH (exception
, RETURN_MASK_ERROR
)
3927 fprintf (stderr
, "gdbserver: %s\n", exception
.message
);
3929 if (response_needed
)
3931 write_enn (own_buf
);
3936 throw_quit ("Quit");
3942 /* Main function. */
3945 main (int argc
, char *argv
[])
3950 captured_main (argc
, argv
);
3952 CATCH (exception
, RETURN_MASK_ALL
)
3954 if (exception
.reason
== RETURN_ERROR
)
3957 fprintf (stderr
, "%s\n", exception
.message
);
3958 fprintf (stderr
, "Exiting\n");
3966 gdb_assert_not_reached ("captured_main should never return");
3969 /* Process options coming from Z packets for a breakpoint. PACKET is
3970 the packet buffer. *PACKET is updated to point to the first char
3971 after the last processed option. */
3974 process_point_options (struct gdb_breakpoint
*bp
, const char **packet
)
3976 const char *dataptr
= *packet
;
3979 /* Check if data has the correct format. */
3980 if (*dataptr
!= ';')
3987 if (*dataptr
== ';')
3990 if (*dataptr
== 'X')
3992 /* Conditional expression. */
3994 debug_printf ("Found breakpoint condition.\n");
3995 if (!add_breakpoint_condition (bp
, &dataptr
))
3996 dataptr
= strchrnul (dataptr
, ';');
3998 else if (startswith (dataptr
, "cmds:"))
4000 dataptr
+= strlen ("cmds:");
4002 debug_printf ("Found breakpoint commands %s.\n", dataptr
);
4003 persist
= (*dataptr
== '1');
4005 if (add_breakpoint_commands (bp
, &dataptr
, persist
))
4006 dataptr
= strchrnul (dataptr
, ';');
4010 fprintf (stderr
, "Unknown token %c, ignoring.\n",
4012 /* Skip tokens until we find one that we recognize. */
4013 dataptr
= strchrnul (dataptr
, ';');
4019 /* Event loop callback that handles a serial event. The first byte in
4020 the serial buffer gets us here. We expect characters to arrive at
4021 a brisk pace, so we read the rest of the packet with a blocking
4025 process_serial_event (void)
4033 int new_packet_len
= -1;
4035 disable_async_io ();
4037 response_needed
= 0;
4038 packet_len
= getpkt (own_buf
);
4039 if (packet_len
<= 0)
4042 /* Force an event loop break. */
4045 response_needed
= 1;
4047 char ch
= own_buf
[0];
4051 handle_query (own_buf
, packet_len
, &new_packet_len
);
4054 handle_general_set (own_buf
);
4057 handle_detach (own_buf
);
4060 extended_protocol
= 1;
4064 handle_status (own_buf
);
4067 if (own_buf
[1] == 'c' || own_buf
[1] == 'g' || own_buf
[1] == 's')
4069 require_running_or_break (own_buf
);
4071 ptid_t thread_id
= read_ptid (&own_buf
[2], NULL
);
4073 if (thread_id
== null_ptid
|| thread_id
== minus_one_ptid
)
4074 thread_id
= null_ptid
;
4075 else if (thread_id
.is_pid ())
4077 /* The ptid represents a pid. */
4078 thread_info
*thread
= find_any_thread_of_pid (thread_id
.pid ());
4082 write_enn (own_buf
);
4086 thread_id
= thread
->id
;
4090 /* The ptid represents a lwp/tid. */
4091 if (find_thread_ptid (thread_id
) == NULL
)
4093 write_enn (own_buf
);
4098 if (own_buf
[1] == 'g')
4100 if (ptid_equal (thread_id
, null_ptid
))
4102 /* GDB is telling us to choose any thread. Check if
4103 the currently selected thread is still valid. If
4104 it is not, select the first available. */
4105 thread_info
*thread
= find_thread_ptid (general_thread
);
4107 thread
= get_first_thread ();
4108 thread_id
= thread
->id
;
4111 general_thread
= thread_id
;
4112 set_desired_thread ();
4113 gdb_assert (current_thread
!= NULL
);
4115 else if (own_buf
[1] == 'c')
4116 cont_thread
= thread_id
;
4122 /* Silently ignore it so that gdb can extend the protocol
4123 without compatibility headaches. */
4128 require_running_or_break (own_buf
);
4129 if (current_traceframe
>= 0)
4131 struct regcache
*regcache
4132 = new_register_cache (current_target_desc ());
4134 if (fetch_traceframe_registers (current_traceframe
,
4136 registers_to_string (regcache
, own_buf
);
4138 write_enn (own_buf
);
4139 free_register_cache (regcache
);
4143 struct regcache
*regcache
;
4145 if (!set_desired_thread ())
4146 write_enn (own_buf
);
4149 regcache
= get_thread_regcache (current_thread
, 1);
4150 registers_to_string (regcache
, own_buf
);
4155 require_running_or_break (own_buf
);
4156 if (current_traceframe
>= 0)
4157 write_enn (own_buf
);
4160 struct regcache
*regcache
;
4162 if (!set_desired_thread ())
4163 write_enn (own_buf
);
4166 regcache
= get_thread_regcache (current_thread
, 1);
4167 registers_from_string (regcache
, &own_buf
[1]);
4173 require_running_or_break (own_buf
);
4174 decode_m_packet (&own_buf
[1], &mem_addr
, &len
);
4175 res
= gdb_read_memory (mem_addr
, mem_buf
, len
);
4177 write_enn (own_buf
);
4179 bin2hex (mem_buf
, own_buf
, res
);
4182 require_running_or_break (own_buf
);
4183 decode_M_packet (&own_buf
[1], &mem_addr
, &len
, &mem_buf
);
4184 if (gdb_write_memory (mem_addr
, mem_buf
, len
) == 0)
4187 write_enn (own_buf
);
4190 require_running_or_break (own_buf
);
4191 if (decode_X_packet (&own_buf
[1], packet_len
- 1,
4192 &mem_addr
, &len
, &mem_buf
) < 0
4193 || gdb_write_memory (mem_addr
, mem_buf
, len
) != 0)
4194 write_enn (own_buf
);
4199 require_running_or_break (own_buf
);
4200 hex2bin (own_buf
+ 1, &sig
, 1);
4201 if (gdb_signal_to_host_p ((enum gdb_signal
) sig
))
4202 signal
= gdb_signal_to_host ((enum gdb_signal
) sig
);
4205 myresume (own_buf
, 0, signal
);
4208 require_running_or_break (own_buf
);
4209 hex2bin (own_buf
+ 1, &sig
, 1);
4210 if (gdb_signal_to_host_p ((enum gdb_signal
) sig
))
4211 signal
= gdb_signal_to_host ((enum gdb_signal
) sig
);
4214 myresume (own_buf
, 1, signal
);
4217 require_running_or_break (own_buf
);
4219 myresume (own_buf
, 0, signal
);
4222 require_running_or_break (own_buf
);
4224 myresume (own_buf
, 1, signal
);
4226 case 'Z': /* insert_ ... */
4228 case 'z': /* remove_ ... */
4233 char type
= own_buf
[1];
4235 const int insert
= ch
== 'Z';
4236 const char *p
= &own_buf
[3];
4238 p
= unpack_varlen_hex (p
, &addr
);
4239 kind
= strtol (p
+ 1, &dataptr
, 16);
4243 struct gdb_breakpoint
*bp
;
4245 bp
= set_gdb_breakpoint (type
, addr
, kind
, &res
);
4250 /* GDB may have sent us a list of *point parameters to
4251 be evaluated on the target's side. Read such list
4252 here. If we already have a list of parameters, GDB
4253 is telling us to drop that list and use this one
4255 clear_breakpoint_conditions_and_commands (bp
);
4256 const char *options
= dataptr
;
4257 process_point_options (bp
, &options
);
4261 res
= delete_gdb_breakpoint (type
, addr
, kind
);
4269 write_enn (own_buf
);
4273 response_needed
= 0;
4274 if (!target_running ())
4275 /* The packet we received doesn't make sense - but we can't
4276 reply to it, either. */
4279 fprintf (stderr
, "Killing all inferiors\n");
4281 for_each_process (kill_inferior_callback
);
4283 /* When using the extended protocol, we wait with no program
4284 running. The traditional protocol will exit instead. */
4285 if (extended_protocol
)
4287 last_status
.kind
= TARGET_WAITKIND_EXITED
;
4288 last_status
.value
.sig
= GDB_SIGNAL_KILL
;
4296 require_running_or_break (own_buf
);
4298 ptid_t thread_id
= read_ptid (&own_buf
[1], NULL
);
4299 if (find_thread_ptid (thread_id
) == NULL
)
4301 write_enn (own_buf
);
4305 if (mythread_alive (thread_id
))
4308 write_enn (own_buf
);
4312 response_needed
= 0;
4314 /* Restarting the inferior is only supported in the extended
4316 if (extended_protocol
)
4318 if (target_running ())
4319 for_each_process (kill_inferior_callback
);
4321 fprintf (stderr
, "GDBserver restarting\n");
4323 /* Wait till we are at 1st instruction in prog. */
4324 if (program_path
.get () != NULL
)
4326 create_inferior (program_path
.get (), program_args
);
4328 if (last_status
.kind
== TARGET_WAITKIND_STOPPED
)
4330 /* Stopped at the first instruction of the target
4332 general_thread
= last_ptid
;
4336 /* Something went wrong. */
4337 general_thread
= null_ptid
;
4342 last_status
.kind
= TARGET_WAITKIND_EXITED
;
4343 last_status
.value
.sig
= GDB_SIGNAL_KILL
;
4349 /* It is a request we don't understand. Respond with an
4350 empty packet so that gdb knows that we don't support this
4356 /* Extended (long) request. */
4357 handle_v_requests (own_buf
, packet_len
, &new_packet_len
);
4361 /* It is a request we don't understand. Respond with an empty
4362 packet so that gdb knows that we don't support this
4368 if (new_packet_len
!= -1)
4369 putpkt_binary (own_buf
, new_packet_len
);
4373 response_needed
= 0;
4381 /* Event-loop callback for serial events. */
4384 handle_serial_event (int err
, gdb_client_data client_data
)
4387 debug_printf ("handling possible serial event\n");
4389 /* Really handle it. */
4390 if (process_serial_event () < 0)
4393 /* Be sure to not change the selected thread behind GDB's back.
4394 Important in the non-stop mode asynchronous protocol. */
4395 set_desired_thread ();
4400 /* Push a stop notification on the notification queue. */
4403 push_stop_notification (ptid_t ptid
, struct target_waitstatus
*status
)
4405 struct vstop_notif
*vstop_notif
= XNEW (struct vstop_notif
);
4407 vstop_notif
->status
= *status
;
4408 vstop_notif
->ptid
= ptid
;
4409 /* Push Stop notification. */
4410 notif_push (¬if_stop
, (struct notif_event
*) vstop_notif
);
4413 /* Event-loop callback for target events. */
4416 handle_target_event (int err
, gdb_client_data client_data
)
4419 debug_printf ("handling possible target event\n");
4421 last_ptid
= mywait (minus_one_ptid
, &last_status
,
4424 if (last_status
.kind
== TARGET_WAITKIND_NO_RESUMED
)
4426 if (gdb_connected () && report_no_resumed
)
4427 push_stop_notification (null_ptid
, &last_status
);
4429 else if (last_status
.kind
!= TARGET_WAITKIND_IGNORE
)
4431 int pid
= ptid_get_pid (last_ptid
);
4432 struct process_info
*process
= find_process_pid (pid
);
4433 int forward_event
= !gdb_connected () || process
->gdb_detached
;
4435 if (last_status
.kind
== TARGET_WAITKIND_EXITED
4436 || last_status
.kind
== TARGET_WAITKIND_SIGNALLED
)
4438 mark_breakpoints_out (process
);
4439 target_mourn_inferior (last_ptid
);
4441 else if (last_status
.kind
== TARGET_WAITKIND_THREAD_EXITED
)
4445 /* We're reporting this thread as stopped. Update its
4446 "want-stopped" state to what the client wants, until it
4447 gets a new resume action. */
4448 current_thread
->last_resume_kind
= resume_stop
;
4449 current_thread
->last_status
= last_status
;
4454 if (!target_running ())
4456 /* The last process exited. We're done. */
4460 if (last_status
.kind
== TARGET_WAITKIND_EXITED
4461 || last_status
.kind
== TARGET_WAITKIND_SIGNALLED
4462 || last_status
.kind
== TARGET_WAITKIND_THREAD_EXITED
)
4466 /* A thread stopped with a signal, but gdb isn't
4467 connected to handle it. Pass it down to the
4468 inferior, as if it wasn't being traced. */
4469 enum gdb_signal signal
;
4472 debug_printf ("GDB not connected; forwarding event %d for"
4474 (int) last_status
.kind
,
4475 target_pid_to_str (last_ptid
));
4477 if (last_status
.kind
== TARGET_WAITKIND_STOPPED
)
4478 signal
= last_status
.value
.sig
;
4480 signal
= GDB_SIGNAL_0
;
4481 target_continue (last_ptid
, signal
);
4485 push_stop_notification (last_ptid
, &last_status
);
4488 /* Be sure to not change the selected thread behind GDB's back.
4489 Important in the non-stop mode asynchronous protocol. */
4490 set_desired_thread ();
4503 } // namespace selftests
4504 #endif /* GDB_SELF_TEST */