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;
77 static int extended_protocol
;
78 static int response_needed
;
79 static int exit_requested
;
81 /* --once: Exit after the first connection has closed. */
84 /* Whether to report TARGET_WAITKING_NO_RESUMED events. */
85 static int report_no_resumed
;
90 /* Set the PROGRAM_PATH. Here we adjust the path of the provided
92 void set (gdb::unique_xmalloc_ptr
<char> &&path
)
94 m_path
= std::move (path
);
96 /* Make sure we're using the absolute path of the inferior when
98 if (!contains_dir_separator (m_path
.get ()))
102 /* Check if the file is in our CWD. If it is, then we prefix
103 its name with CURRENT_DIRECTORY. Otherwise, we leave the
104 name as-is because we'll try searching for it in $PATH. */
105 if (is_regular_file (m_path
.get (), ®_file_errno
))
106 m_path
= gdb_abspath (m_path
.get ());
110 /* Return the PROGRAM_PATH. */
112 { return m_path
.get (); }
115 /* The program name, adjusted if needed. */
116 gdb::unique_xmalloc_ptr
<char> m_path
;
118 static std::vector
<char *> program_args
;
119 static std::string wrapper_argv
;
121 /* The PID of the originally created or attached inferior. Used to
122 send signals to the process when GDB sends us an asynchronous interrupt
123 (user hitting Control-C in the client), and to wait for the child to exit
124 when no longer debugging it. */
126 unsigned long signal_pid
;
128 /* Set if you want to disable optional thread related packets support
129 in gdbserver, for the sake of testing GDB against stubs that don't
131 int disable_packet_vCont
;
132 int disable_packet_Tthread
;
133 int disable_packet_qC
;
134 int disable_packet_qfThreadInfo
;
136 static unsigned char *mem_buf
;
138 /* A sub-class of 'struct notif_event' for stop, holding information
139 relative to a single stop reply. We keep a queue of these to
140 push to GDB in non-stop mode. */
144 struct notif_event base
;
146 /* Thread or process that got the event. */
150 struct target_waitstatus status
;
153 /* The current btrace configuration. This is gdbserver's mirror of GDB's
154 btrace configuration. */
155 static struct btrace_config current_btrace_conf
;
157 DEFINE_QUEUE_P (notif_event_p
);
159 /* The client remote protocol state. */
161 static client_state g_client_state
;
166 client_state
&cs
= g_client_state
;
171 /* Put a stop reply to the stop reply queue. */
174 queue_stop_reply (ptid_t ptid
, struct target_waitstatus
*status
)
176 struct vstop_notif
*new_notif
= XNEW (struct vstop_notif
);
178 new_notif
->ptid
= ptid
;
179 new_notif
->status
= *status
;
181 notif_event_enque (¬if_stop
, (struct notif_event
*) new_notif
);
185 remove_all_on_match_ptid (QUEUE (notif_event_p
) *q
,
186 QUEUE_ITER (notif_event_p
) *iter
,
187 struct notif_event
*event
,
190 ptid_t filter_ptid
= *(ptid_t
*) data
;
191 struct vstop_notif
*vstop_event
= (struct vstop_notif
*) event
;
193 if (vstop_event
->ptid
.matches (filter_ptid
))
195 if (q
->free_func
!= NULL
)
196 q
->free_func (event
);
198 QUEUE_remove_elem (notif_event_p
, q
, iter
);
207 discard_queued_stop_replies (ptid_t ptid
)
209 QUEUE_iterate (notif_event_p
, notif_stop
.queue
,
210 remove_all_on_match_ptid
, &ptid
);
214 vstop_notif_reply (struct notif_event
*event
, char *own_buf
)
216 struct vstop_notif
*vstop
= (struct vstop_notif
*) event
;
218 prepare_resume_reply (own_buf
, vstop
->ptid
, &vstop
->status
);
221 /* QUEUE_iterate callback helper for in_queued_stop_replies. */
224 in_queued_stop_replies_ptid (QUEUE (notif_event_p
) *q
,
225 QUEUE_ITER (notif_event_p
) *iter
,
226 struct notif_event
*event
,
229 ptid_t filter_ptid
= *(ptid_t
*) data
;
230 struct vstop_notif
*vstop_event
= (struct vstop_notif
*) event
;
232 if (vstop_event
->ptid
.matches (filter_ptid
))
235 /* Don't resume fork children that GDB does not know about yet. */
236 if ((vstop_event
->status
.kind
== TARGET_WAITKIND_FORKED
237 || vstop_event
->status
.kind
== TARGET_WAITKIND_VFORKED
)
238 && vstop_event
->status
.value
.related_pid
.matches (filter_ptid
))
247 in_queued_stop_replies (ptid_t ptid
)
249 return !QUEUE_iterate (notif_event_p
, notif_stop
.queue
,
250 in_queued_stop_replies_ptid
, &ptid
);
253 struct notif_server notif_stop
=
255 "vStopped", "Stop", NULL
, vstop_notif_reply
,
259 target_running (void)
261 return get_first_thread () != NULL
;
264 /* See common/common-inferior.h. */
269 return !wrapper_argv
.empty () ? wrapper_argv
.c_str () : NULL
;
272 /* See common/common-inferior.h. */
275 get_exec_file (int err
)
277 if (err
&& program_path
.get () == NULL
)
278 error (_("No executable file specified."));
280 return program_path
.get ();
292 attach_inferior (int pid
)
294 client_state
&cs
= get_client_state ();
295 /* myattach should return -1 if attaching is unsupported,
296 0 if it succeeded, and call error() otherwise. */
298 if (myattach (pid
) != 0)
301 fprintf (stderr
, "Attached; pid = %d\n", pid
);
304 /* FIXME - It may be that we should get the SIGNAL_PID from the
305 attach function, so that it can be the main thread instead of
306 whichever we were told to attach to. */
311 cs
.last_ptid
= mywait (ptid_t (pid
), &cs
.last_status
, 0, 0);
313 /* GDB knows to ignore the first SIGSTOP after attaching to a running
314 process using the "attach" command, but this is different; it's
315 just using "target remote". Pretend it's just starting up. */
316 if (cs
.last_status
.kind
== TARGET_WAITKIND_STOPPED
317 && cs
.last_status
.value
.sig
== GDB_SIGNAL_STOP
)
318 cs
.last_status
.value
.sig
= GDB_SIGNAL_TRAP
;
320 current_thread
->last_resume_kind
= resume_stop
;
321 current_thread
->last_status
= cs
.last_status
;
327 extern int remote_debug
;
329 /* Decode a qXfer read request. Return 0 if everything looks OK,
333 decode_xfer_read (char *buf
, CORE_ADDR
*ofs
, unsigned int *len
)
335 /* After the read marker and annex, qXfer looks like a
336 traditional 'm' packet. */
337 decode_m_packet (buf
, ofs
, len
);
343 decode_xfer (char *buf
, char **object
, char **rw
, char **annex
, char **offset
)
345 /* Extract and NUL-terminate the object. */
347 while (*buf
&& *buf
!= ':')
353 /* Extract and NUL-terminate the read/write action. */
355 while (*buf
&& *buf
!= ':')
361 /* Extract and NUL-terminate the annex. */
363 while (*buf
&& *buf
!= ':')
373 /* Write the response to a successful qXfer read. Returns the
374 length of the (binary) data stored in BUF, corresponding
375 to as much of DATA/LEN as we could fit. IS_MORE controls
376 the first character of the response. */
378 write_qxfer_response (char *buf
, const gdb_byte
*data
, int len
, int is_more
)
387 return remote_escape_output (data
, len
, 1, (unsigned char *) buf
+ 1,
388 &out_len
, PBUFSIZ
- 2) + 1;
391 /* Handle btrace enabling in BTS format. */
394 handle_btrace_enable_bts (struct thread_info
*thread
)
396 if (thread
->btrace
!= NULL
)
397 error (_("Btrace already enabled."));
399 current_btrace_conf
.format
= BTRACE_FORMAT_BTS
;
400 thread
->btrace
= target_enable_btrace (thread
->id
, ¤t_btrace_conf
);
403 /* Handle btrace enabling in Intel Processor Trace format. */
406 handle_btrace_enable_pt (struct thread_info
*thread
)
408 if (thread
->btrace
!= NULL
)
409 error (_("Btrace already enabled."));
411 current_btrace_conf
.format
= BTRACE_FORMAT_PT
;
412 thread
->btrace
= target_enable_btrace (thread
->id
, ¤t_btrace_conf
);
415 /* Handle btrace disabling. */
418 handle_btrace_disable (struct thread_info
*thread
)
421 if (thread
->btrace
== NULL
)
422 error (_("Branch tracing not enabled."));
424 if (target_disable_btrace (thread
->btrace
) != 0)
425 error (_("Could not disable branch tracing."));
427 thread
->btrace
= NULL
;
430 /* Handle the "Qbtrace" packet. */
433 handle_btrace_general_set (char *own_buf
)
435 client_state
&cs
= get_client_state ();
436 struct thread_info
*thread
;
439 if (!startswith (own_buf
, "Qbtrace:"))
442 op
= own_buf
+ strlen ("Qbtrace:");
444 if (cs
.general_thread
== null_ptid
445 || cs
.general_thread
== minus_one_ptid
)
447 strcpy (own_buf
, "E.Must select a single thread.");
451 thread
= find_thread_ptid (cs
.general_thread
);
454 strcpy (own_buf
, "E.No such thread.");
460 if (strcmp (op
, "bts") == 0)
461 handle_btrace_enable_bts (thread
);
462 else if (strcmp (op
, "pt") == 0)
463 handle_btrace_enable_pt (thread
);
464 else if (strcmp (op
, "off") == 0)
465 handle_btrace_disable (thread
);
467 error (_("Bad Qbtrace operation. Use bts, pt, or off."));
471 CATCH (exception
, RETURN_MASK_ERROR
)
473 sprintf (own_buf
, "E.%s", exception
.message
);
480 /* Handle the "Qbtrace-conf" packet. */
483 handle_btrace_conf_general_set (char *own_buf
)
485 client_state
&cs
= get_client_state ();
486 struct thread_info
*thread
;
489 if (!startswith (own_buf
, "Qbtrace-conf:"))
492 op
= own_buf
+ strlen ("Qbtrace-conf:");
494 if (cs
.general_thread
== null_ptid
495 || cs
.general_thread
== minus_one_ptid
)
497 strcpy (own_buf
, "E.Must select a single thread.");
501 thread
= find_thread_ptid (cs
.general_thread
);
504 strcpy (own_buf
, "E.No such thread.");
508 if (startswith (op
, "bts:size="))
514 size
= strtoul (op
+ strlen ("bts:size="), &endp
, 16);
515 if (endp
== NULL
|| *endp
!= 0 || errno
!= 0 || size
> UINT_MAX
)
517 strcpy (own_buf
, "E.Bad size value.");
521 current_btrace_conf
.bts
.size
= (unsigned int) size
;
523 else if (strncmp (op
, "pt:size=", strlen ("pt:size=")) == 0)
529 size
= strtoul (op
+ strlen ("pt:size="), &endp
, 16);
530 if (endp
== NULL
|| *endp
!= 0 || errno
!= 0 || size
> UINT_MAX
)
532 strcpy (own_buf
, "E.Bad size value.");
536 current_btrace_conf
.pt
.size
= (unsigned int) size
;
540 strcpy (own_buf
, "E.Bad Qbtrace configuration option.");
548 /* Handle all of the extended 'Q' packets. */
551 handle_general_set (char *own_buf
)
553 client_state
&cs
= get_client_state ();
554 if (startswith (own_buf
, "QPassSignals:"))
556 int numsigs
= (int) GDB_SIGNAL_LAST
, i
;
557 const char *p
= own_buf
+ strlen ("QPassSignals:");
560 p
= decode_address_to_semicolon (&cursig
, p
);
561 for (i
= 0; i
< numsigs
; i
++)
565 cs
.pass_signals
[i
] = 1;
567 /* Keep looping, to clear the remaining signals. */
570 p
= decode_address_to_semicolon (&cursig
, p
);
573 cs
.pass_signals
[i
] = 0;
575 strcpy (own_buf
, "OK");
579 if (startswith (own_buf
, "QProgramSignals:"))
581 int numsigs
= (int) GDB_SIGNAL_LAST
, i
;
582 const char *p
= own_buf
+ strlen ("QProgramSignals:");
585 cs
.program_signals_p
= 1;
587 p
= decode_address_to_semicolon (&cursig
, p
);
588 for (i
= 0; i
< numsigs
; i
++)
592 cs
.program_signals
[i
] = 1;
594 /* Keep looping, to clear the remaining signals. */
597 p
= decode_address_to_semicolon (&cursig
, p
);
600 cs
.program_signals
[i
] = 0;
602 strcpy (own_buf
, "OK");
606 if (startswith (own_buf
, "QCatchSyscalls:"))
608 const char *p
= own_buf
+ sizeof ("QCatchSyscalls:") - 1;
611 struct process_info
*process
;
613 if (!target_running () || !target_supports_catch_syscall ())
619 if (strcmp (p
, "0") == 0)
621 else if (p
[0] == '1' && (p
[1] == ';' || p
[1] == '\0'))
625 fprintf (stderr
, "Unknown catch-syscalls mode requested: %s\n",
631 process
= current_process ();
632 process
->syscalls_to_catch
.clear ();
642 p
= decode_address_to_semicolon (&sysno
, p
);
643 process
->syscalls_to_catch
.push_back (sysno
);
647 process
->syscalls_to_catch
.push_back (ANY_SYSCALL
);
654 if (strcmp (own_buf
, "QEnvironmentReset") == 0)
656 our_environ
= gdb_environ::from_host_environ ();
662 if (startswith (own_buf
, "QEnvironmentHexEncoded:"))
664 const char *p
= own_buf
+ sizeof ("QEnvironmentHexEncoded:") - 1;
665 /* The final form of the environment variable. FINAL_VAR will
666 hold the 'VAR=VALUE' format. */
667 std::string final_var
= hex2str (p
);
668 std::string var_name
, var_value
;
672 debug_printf (_("[QEnvironmentHexEncoded received '%s']\n"), p
);
673 debug_printf (_("[Environment variable to be set: '%s']\n"),
678 size_t pos
= final_var
.find ('=');
679 if (pos
== std::string::npos
)
681 warning (_("Unexpected format for environment variable: '%s'"),
687 var_name
= final_var
.substr (0, pos
);
688 var_value
= final_var
.substr (pos
+ 1, std::string::npos
);
690 our_environ
.set (var_name
.c_str (), var_value
.c_str ());
696 if (startswith (own_buf
, "QEnvironmentUnset:"))
698 const char *p
= own_buf
+ sizeof ("QEnvironmentUnset:") - 1;
699 std::string varname
= hex2str (p
);
703 debug_printf (_("[QEnvironmentUnset received '%s']\n"), p
);
704 debug_printf (_("[Environment variable to be unset: '%s']\n"),
709 our_environ
.unset (varname
.c_str ());
715 if (strcmp (own_buf
, "QStartNoAckMode") == 0)
719 debug_printf ("[noack mode enabled]\n");
728 if (startswith (own_buf
, "QNonStop:"))
730 char *mode
= own_buf
+ 9;
734 if (strcmp (mode
, "0") == 0)
736 else if (strcmp (mode
, "1") == 0)
740 /* We don't know what this mode is, so complain to
742 fprintf (stderr
, "Unknown non-stop mode requested: %s\n",
748 req_str
= req
? "non-stop" : "all-stop";
749 if (start_non_stop (req
) != 0)
751 fprintf (stderr
, "Setting %s mode failed\n", req_str
);
759 debug_printf ("[%s mode enabled]\n", req_str
);
765 if (startswith (own_buf
, "QDisableRandomization:"))
767 char *packet
= own_buf
+ strlen ("QDisableRandomization:");
770 unpack_varlen_hex (packet
, &setting
);
771 cs
.disable_randomization
= setting
;
775 debug_printf (cs
.disable_randomization
776 ? "[address space randomization disabled]\n"
777 : "[address space randomization enabled]\n");
784 if (target_supports_tracepoints ()
785 && handle_tracepoint_general_set (own_buf
))
788 if (startswith (own_buf
, "QAgent:"))
790 char *mode
= own_buf
+ strlen ("QAgent:");
793 if (strcmp (mode
, "0") == 0)
795 else if (strcmp (mode
, "1") == 0)
799 /* We don't know what this value is, so complain to GDB. */
800 sprintf (own_buf
, "E.Unknown QAgent value");
804 /* Update the flag. */
807 debug_printf ("[%s agent]\n", req
? "Enable" : "Disable");
812 if (handle_btrace_general_set (own_buf
))
815 if (handle_btrace_conf_general_set (own_buf
))
818 if (startswith (own_buf
, "QThreadEvents:"))
820 char *mode
= own_buf
+ strlen ("QThreadEvents:");
821 enum tribool req
= TRIBOOL_UNKNOWN
;
823 if (strcmp (mode
, "0") == 0)
825 else if (strcmp (mode
, "1") == 0)
829 /* We don't know what this mode is, so complain to GDB. */
830 sprintf (own_buf
, "E.Unknown thread-events mode requested: %s\n",
835 cs
.report_thread_events
= (req
== TRIBOOL_TRUE
);
839 const char *req_str
= cs
.report_thread_events
? "enabled" : "disabled";
841 debug_printf ("[thread events are now %s]\n", req_str
);
848 if (startswith (own_buf
, "QStartupWithShell:"))
850 const char *value
= own_buf
+ strlen ("QStartupWithShell:");
852 if (strcmp (value
, "1") == 0)
853 startup_with_shell
= true;
854 else if (strcmp (value
, "0") == 0)
855 startup_with_shell
= false;
859 fprintf (stderr
, "Unknown value to startup-with-shell: %s\n",
866 debug_printf (_("[Inferior will %s started with shell]"),
867 startup_with_shell
? "be" : "not be");
873 if (startswith (own_buf
, "QSetWorkingDir:"))
875 const char *p
= own_buf
+ strlen ("QSetWorkingDir:");
879 std::string path
= hex2str (p
);
881 set_inferior_cwd (path
.c_str ());
884 debug_printf (_("[Set the inferior's current directory to %s]\n"),
889 /* An empty argument means that we should clear out any
890 previously set cwd for the inferior. */
891 set_inferior_cwd (NULL
);
895 [Unset the inferior's current directory; will use gdbserver's cwd]\n"));
902 /* Otherwise we didn't know what packet it was. Say we didn't
908 get_features_xml (const char *annex
)
910 const struct target_desc
*desc
= current_target_desc ();
912 /* `desc->xmltarget' defines what to return when looking for the
913 "target.xml" file. Its contents can either be verbatim XML code
914 (prefixed with a '@') or else the name of the actual XML file to
915 be used in place of "target.xml".
917 This variable is set up from the auto-generated
918 init_registers_... routine for the current target. */
920 if (strcmp (annex
, "target.xml") == 0)
922 const char *ret
= tdesc_get_features_xml (desc
);
932 extern const char *const xml_builtin
[][2];
935 /* Look for the annex. */
936 for (i
= 0; xml_builtin
[i
][0] != NULL
; i
++)
937 if (strcmp (annex
, xml_builtin
[i
][0]) == 0)
940 if (xml_builtin
[i
][0] != NULL
)
941 return xml_builtin
[i
][1];
949 monitor_show_help (void)
951 monitor_output ("The following monitor commands are supported:\n");
952 monitor_output (" set debug <0|1>\n");
953 monitor_output (" Enable general debugging messages\n");
954 monitor_output (" set debug-hw-points <0|1>\n");
955 monitor_output (" Enable h/w breakpoint/watchpoint debugging messages\n");
956 monitor_output (" set remote-debug <0|1>\n");
957 monitor_output (" Enable remote protocol debugging messages\n");
958 monitor_output (" set debug-format option1[,option2,...]\n");
959 monitor_output (" Add additional information to debugging messages\n");
960 monitor_output (" Options: all, none");
961 monitor_output (", timestamp");
962 monitor_output ("\n");
963 monitor_output (" exit\n");
964 monitor_output (" Quit GDBserver\n");
967 /* Read trace frame or inferior memory. Returns the number of bytes
968 actually read, zero when no further transfer is possible, and -1 on
969 error. Return of a positive value smaller than LEN does not
970 indicate there's no more to be read, only the end of the transfer.
971 E.g., when GDB reads memory from a traceframe, a first request may
972 be served from a memory block that does not cover the whole request
973 length. A following request gets the rest served from either
974 another block (of the same traceframe) or from the read-only
978 gdb_read_memory (CORE_ADDR memaddr
, unsigned char *myaddr
, int len
)
980 client_state
&cs
= get_client_state ();
983 if (cs
.current_traceframe
>= 0)
986 ULONGEST length
= len
;
988 if (traceframe_read_mem (cs
.current_traceframe
,
989 memaddr
, myaddr
, len
, &nbytes
))
991 /* Data read from trace buffer, we're done. */
994 if (!in_readonly_region (memaddr
, length
))
996 /* Otherwise we have a valid readonly case, fall through. */
997 /* (assume no half-trace half-real blocks for now) */
1000 res
= prepare_to_access_memory ();
1003 if (set_desired_thread ())
1004 res
= read_inferior_memory (memaddr
, myaddr
, len
);
1007 done_accessing_memory ();
1009 return res
== 0 ? len
: -1;
1015 /* Write trace frame or inferior memory. Actually, writing to trace
1016 frames is forbidden. */
1019 gdb_write_memory (CORE_ADDR memaddr
, const unsigned char *myaddr
, int len
)
1021 client_state
&cs
= get_client_state ();
1022 if (cs
.current_traceframe
>= 0)
1028 ret
= prepare_to_access_memory ();
1031 if (set_desired_thread ())
1032 ret
= write_inferior_memory (memaddr
, myaddr
, len
);
1035 done_accessing_memory ();
1041 /* Subroutine of handle_search_memory to simplify it. */
1044 handle_search_memory_1 (CORE_ADDR start_addr
, CORE_ADDR search_space_len
,
1045 gdb_byte
*pattern
, unsigned pattern_len
,
1046 gdb_byte
*search_buf
,
1047 unsigned chunk_size
, unsigned search_buf_size
,
1048 CORE_ADDR
*found_addrp
)
1050 /* Prime the search buffer. */
1052 if (gdb_read_memory (start_addr
, search_buf
, search_buf_size
)
1055 warning ("Unable to access %ld bytes of target "
1056 "memory at 0x%lx, halting search.",
1057 (long) search_buf_size
, (long) start_addr
);
1061 /* Perform the search.
1063 The loop is kept simple by allocating [N + pattern-length - 1] bytes.
1064 When we've scanned N bytes we copy the trailing bytes to the start and
1065 read in another N bytes. */
1067 while (search_space_len
>= pattern_len
)
1069 gdb_byte
*found_ptr
;
1070 unsigned nr_search_bytes
= (search_space_len
< search_buf_size
1074 found_ptr
= (gdb_byte
*) memmem (search_buf
, nr_search_bytes
, pattern
,
1077 if (found_ptr
!= NULL
)
1079 CORE_ADDR found_addr
= start_addr
+ (found_ptr
- search_buf
);
1080 *found_addrp
= found_addr
;
1084 /* Not found in this chunk, skip to next chunk. */
1086 /* Don't let search_space_len wrap here, it's unsigned. */
1087 if (search_space_len
>= chunk_size
)
1088 search_space_len
-= chunk_size
;
1090 search_space_len
= 0;
1092 if (search_space_len
>= pattern_len
)
1094 unsigned keep_len
= search_buf_size
- chunk_size
;
1095 CORE_ADDR read_addr
= start_addr
+ chunk_size
+ keep_len
;
1098 /* Copy the trailing part of the previous iteration to the front
1099 of the buffer for the next iteration. */
1100 memcpy (search_buf
, search_buf
+ chunk_size
, keep_len
);
1102 nr_to_read
= (search_space_len
- keep_len
< chunk_size
1103 ? search_space_len
- keep_len
1106 if (gdb_read_memory (read_addr
, search_buf
+ keep_len
,
1107 nr_to_read
) != search_buf_size
)
1109 warning ("Unable to access %ld bytes of target memory "
1110 "at 0x%lx, halting search.",
1111 (long) nr_to_read
, (long) read_addr
);
1115 start_addr
+= chunk_size
;
1124 /* Handle qSearch:memory packets. */
1127 handle_search_memory (char *own_buf
, int packet_len
)
1129 CORE_ADDR start_addr
;
1130 CORE_ADDR search_space_len
;
1132 unsigned int pattern_len
;
1133 /* NOTE: also defined in find.c testcase. */
1134 #define SEARCH_CHUNK_SIZE 16000
1135 const unsigned chunk_size
= SEARCH_CHUNK_SIZE
;
1136 /* Buffer to hold memory contents for searching. */
1137 gdb_byte
*search_buf
;
1138 unsigned search_buf_size
;
1140 CORE_ADDR found_addr
;
1141 int cmd_name_len
= sizeof ("qSearch:memory:") - 1;
1143 pattern
= (gdb_byte
*) malloc (packet_len
);
1144 if (pattern
== NULL
)
1146 error ("Unable to allocate memory to perform the search");
1147 strcpy (own_buf
, "E00");
1150 if (decode_search_memory_packet (own_buf
+ cmd_name_len
,
1151 packet_len
- cmd_name_len
,
1152 &start_addr
, &search_space_len
,
1153 pattern
, &pattern_len
) < 0)
1156 error ("Error in parsing qSearch:memory packet");
1157 strcpy (own_buf
, "E00");
1161 search_buf_size
= chunk_size
+ pattern_len
- 1;
1163 /* No point in trying to allocate a buffer larger than the search space. */
1164 if (search_space_len
< search_buf_size
)
1165 search_buf_size
= search_space_len
;
1167 search_buf
= (gdb_byte
*) malloc (search_buf_size
);
1168 if (search_buf
== NULL
)
1171 error ("Unable to allocate memory to perform the search");
1172 strcpy (own_buf
, "E00");
1176 found
= handle_search_memory_1 (start_addr
, search_space_len
,
1177 pattern
, pattern_len
,
1178 search_buf
, chunk_size
, search_buf_size
,
1182 sprintf (own_buf
, "1,%lx", (long) found_addr
);
1183 else if (found
== 0)
1184 strcpy (own_buf
, "0");
1186 strcpy (own_buf
, "E00");
1192 /* Handle the "D" packet. */
1195 handle_detach (char *own_buf
)
1197 client_state
&cs
= get_client_state ();
1199 process_info
*process
;
1201 if (cs
.multi_process
)
1204 int pid
= strtol (&own_buf
[2], NULL
, 16);
1206 process
= find_process_pid (pid
);
1210 process
= (current_thread
!= nullptr
1211 ? get_thread_process (current_thread
)
1215 if (process
== NULL
)
1217 write_enn (own_buf
);
1221 if ((tracing
&& disconnected_tracing
) || any_persistent_commands (process
))
1223 if (tracing
&& disconnected_tracing
)
1225 "Disconnected tracing in effect, "
1226 "leaving gdbserver attached to the process\n");
1228 if (any_persistent_commands (process
))
1230 "Persistent commands are present, "
1231 "leaving gdbserver attached to the process\n");
1233 /* Make sure we're in non-stop/async mode, so we we can both
1234 wait for an async socket accept, and handle async target
1235 events simultaneously. There's also no point either in
1236 having the target stop all threads, when we're going to
1237 pass signals down without informing GDB. */
1241 debug_printf ("Forcing non-stop mode\n");
1247 process
->gdb_detached
= 1;
1249 /* Detaching implicitly resumes all threads. */
1250 target_continue_no_signal (minus_one_ptid
);
1256 fprintf (stderr
, "Detaching from process %d\n", process
->pid
);
1258 if (detach_inferior (process
) != 0)
1259 write_enn (own_buf
);
1262 discard_queued_stop_replies (ptid_t (process
->pid
));
1265 if (extended_protocol
|| target_running ())
1267 /* There is still at least one inferior remaining or
1268 we are in extended mode, so don't terminate gdbserver,
1269 and instead treat this like a normal program exit. */
1270 cs
.last_status
.kind
= TARGET_WAITKIND_EXITED
;
1271 cs
.last_status
.value
.integer
= 0;
1272 cs
.last_ptid
= ptid_t (process
->pid
);
1274 current_thread
= NULL
;
1281 /* If we are attached, then we can exit. Otherwise, we
1282 need to hang around doing nothing, until the child is
1284 join_inferior (process
);
1290 /* Parse options to --debug-format= and "monitor set debug-format".
1291 ARG is the text after "--debug-format=" or "monitor set debug-format".
1292 IS_MONITOR is non-zero if we're invoked via "monitor set debug-format".
1293 This triggers calls to monitor_output.
1294 The result is an empty string if all options were parsed ok, otherwise an
1295 error message which the caller must free.
1297 N.B. These commands affect all debug format settings, they are not
1298 cumulative. If a format is not specified, it is turned off.
1299 However, we don't go to extra trouble with things like
1300 "monitor set debug-format all,none,timestamp".
1301 Instead we just parse them one at a time, in order.
1303 The syntax for "monitor set debug" we support here is not identical
1304 to gdb's "set debug foo on|off" because we also use this function to
1305 parse "--debug-format=foo,bar". */
1308 parse_debug_format_options (const char *arg
, int is_monitor
)
1310 /* First turn all debug format options off. */
1311 debug_timestamp
= 0;
1313 /* First remove leading spaces, for "monitor set debug-format". */
1314 while (isspace (*arg
))
1317 std::vector
<gdb::unique_xmalloc_ptr
<char>> options
1318 = delim_string_to_char_ptr_vec (arg
, ',');
1320 for (const gdb::unique_xmalloc_ptr
<char> &option
: options
)
1322 if (strcmp (option
.get (), "all") == 0)
1324 debug_timestamp
= 1;
1326 monitor_output ("All extra debug format options enabled.\n");
1328 else if (strcmp (option
.get (), "none") == 0)
1330 debug_timestamp
= 0;
1332 monitor_output ("All extra debug format options disabled.\n");
1334 else if (strcmp (option
.get (), "timestamp") == 0)
1336 debug_timestamp
= 1;
1338 monitor_output ("Timestamps will be added to debug output.\n");
1340 else if (*option
== '\0')
1342 /* An empty option, e.g., "--debug-format=foo,,bar", is ignored. */
1346 return string_printf ("Unknown debug-format argument: \"%s\"\n",
1350 return std::string ();
1353 /* Handle monitor commands not handled by target-specific handlers. */
1356 handle_monitor_command (char *mon
, char *own_buf
)
1358 if (strcmp (mon
, "set debug 1") == 0)
1361 monitor_output ("Debug output enabled.\n");
1363 else if (strcmp (mon
, "set debug 0") == 0)
1366 monitor_output ("Debug output disabled.\n");
1368 else if (strcmp (mon
, "set debug-hw-points 1") == 0)
1370 show_debug_regs
= 1;
1371 monitor_output ("H/W point debugging output enabled.\n");
1373 else if (strcmp (mon
, "set debug-hw-points 0") == 0)
1375 show_debug_regs
= 0;
1376 monitor_output ("H/W point debugging output disabled.\n");
1378 else if (strcmp (mon
, "set remote-debug 1") == 0)
1381 monitor_output ("Protocol debug output enabled.\n");
1383 else if (strcmp (mon
, "set remote-debug 0") == 0)
1386 monitor_output ("Protocol debug output disabled.\n");
1388 else if (startswith (mon
, "set debug-format "))
1390 std::string error_msg
1391 = parse_debug_format_options (mon
+ sizeof ("set debug-format ") - 1,
1394 if (!error_msg
.empty ())
1396 monitor_output (error_msg
.c_str ());
1397 monitor_show_help ();
1398 write_enn (own_buf
);
1401 else if (strcmp (mon
, "help") == 0)
1402 monitor_show_help ();
1403 else if (strcmp (mon
, "exit") == 0)
1407 monitor_output ("Unknown monitor command.\n\n");
1408 monitor_show_help ();
1409 write_enn (own_buf
);
1413 /* Associates a callback with each supported qXfer'able object. */
1417 /* The object this handler handles. */
1420 /* Request that the target transfer up to LEN 8-bit bytes of the
1421 target's OBJECT. The OFFSET, for a seekable object, specifies
1422 the starting point. The ANNEX can be used to provide additional
1423 data-specific information to the target.
1425 Return the number of bytes actually transfered, zero when no
1426 further transfer is possible, -1 on error, -2 when the transfer
1427 is not supported, and -3 on a verbose error message that should
1428 be preserved. Return of a positive value smaller than LEN does
1429 not indicate the end of the object, only the end of the transfer.
1431 One, and only one, of readbuf or writebuf must be non-NULL. */
1432 int (*xfer
) (const char *annex
,
1433 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1434 ULONGEST offset
, LONGEST len
);
1437 /* Handle qXfer:auxv:read. */
1440 handle_qxfer_auxv (const char *annex
,
1441 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1442 ULONGEST offset
, LONGEST len
)
1444 if (the_target
->read_auxv
== NULL
|| writebuf
!= NULL
)
1447 if (annex
[0] != '\0' || current_thread
== NULL
)
1450 return (*the_target
->read_auxv
) (offset
, readbuf
, len
);
1453 /* Handle qXfer:exec-file:read. */
1456 handle_qxfer_exec_file (const char *annex
,
1457 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1458 ULONGEST offset
, LONGEST len
)
1464 if (the_target
->pid_to_exec_file
== NULL
|| writebuf
!= NULL
)
1467 if (annex
[0] == '\0')
1469 if (current_thread
== NULL
)
1472 pid
= pid_of (current_thread
);
1476 annex
= unpack_varlen_hex (annex
, &pid
);
1477 if (annex
[0] != '\0')
1484 file
= (*the_target
->pid_to_exec_file
) (pid
);
1488 total_len
= strlen (file
);
1490 if (offset
> total_len
)
1493 if (offset
+ len
> total_len
)
1494 len
= total_len
- offset
;
1496 memcpy (readbuf
, file
+ offset
, len
);
1500 /* Handle qXfer:features:read. */
1503 handle_qxfer_features (const char *annex
,
1504 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1505 ULONGEST offset
, LONGEST len
)
1507 const char *document
;
1510 if (writebuf
!= NULL
)
1513 if (!target_running ())
1516 /* Grab the correct annex. */
1517 document
= get_features_xml (annex
);
1518 if (document
== NULL
)
1521 total_len
= strlen (document
);
1523 if (offset
> total_len
)
1526 if (offset
+ len
> total_len
)
1527 len
= total_len
- offset
;
1529 memcpy (readbuf
, document
+ offset
, len
);
1533 /* Handle qXfer:libraries:read. */
1536 handle_qxfer_libraries (const char *annex
,
1537 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1538 ULONGEST offset
, LONGEST len
)
1540 if (writebuf
!= NULL
)
1543 if (annex
[0] != '\0' || current_thread
== NULL
)
1546 std::string document
= "<library-list version=\"1.0\">\n";
1548 for (const dll_info
&dll
: all_dlls
)
1549 document
+= string_printf
1550 (" <library name=\"%s\"><segment address=\"0x%lx\"/></library>\n",
1551 dll
.name
.c_str (), (long) dll
.base_addr
);
1553 document
+= "</library-list>\n";
1555 if (offset
> document
.length ())
1558 if (offset
+ len
> document
.length ())
1559 len
= document
.length () - offset
;
1561 memcpy (readbuf
, &document
[offset
], len
);
1566 /* Handle qXfer:libraries-svr4:read. */
1569 handle_qxfer_libraries_svr4 (const char *annex
,
1570 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1571 ULONGEST offset
, LONGEST len
)
1573 if (writebuf
!= NULL
)
1576 if (current_thread
== NULL
|| the_target
->qxfer_libraries_svr4
== NULL
)
1579 return the_target
->qxfer_libraries_svr4 (annex
, readbuf
, writebuf
, offset
, len
);
1582 /* Handle qXfer:osadata:read. */
1585 handle_qxfer_osdata (const char *annex
,
1586 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1587 ULONGEST offset
, LONGEST len
)
1589 if (the_target
->qxfer_osdata
== NULL
|| writebuf
!= NULL
)
1592 return (*the_target
->qxfer_osdata
) (annex
, readbuf
, NULL
, offset
, len
);
1595 /* Handle qXfer:siginfo:read and qXfer:siginfo:write. */
1598 handle_qxfer_siginfo (const char *annex
,
1599 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1600 ULONGEST offset
, LONGEST len
)
1602 if (the_target
->qxfer_siginfo
== NULL
)
1605 if (annex
[0] != '\0' || current_thread
== NULL
)
1608 return (*the_target
->qxfer_siginfo
) (annex
, readbuf
, writebuf
, offset
, len
);
1611 /* Handle qXfer:spu:read and qXfer:spu:write. */
1614 handle_qxfer_spu (const char *annex
,
1615 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1616 ULONGEST offset
, LONGEST len
)
1618 if (the_target
->qxfer_spu
== NULL
)
1621 if (current_thread
== NULL
)
1624 return (*the_target
->qxfer_spu
) (annex
, readbuf
, writebuf
, offset
, len
);
1627 /* Handle qXfer:statictrace:read. */
1630 handle_qxfer_statictrace (const char *annex
,
1631 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1632 ULONGEST offset
, LONGEST len
)
1634 client_state
&cs
= get_client_state ();
1637 if (writebuf
!= NULL
)
1640 if (annex
[0] != '\0' || current_thread
== NULL
1641 || cs
.current_traceframe
== -1)
1644 if (traceframe_read_sdata (cs
.current_traceframe
, offset
,
1645 readbuf
, len
, &nbytes
))
1650 /* Helper for handle_qxfer_threads_proper.
1651 Emit the XML to describe the thread of INF. */
1654 handle_qxfer_threads_worker (thread_info
*thread
, struct buffer
*buffer
)
1656 ptid_t ptid
= ptid_of (thread
);
1658 int core
= target_core_of_thread (ptid
);
1660 const char *name
= target_thread_name (ptid
);
1663 bool handle_status
= target_thread_handle (ptid
, &handle
, &handle_len
);
1665 write_ptid (ptid_s
, ptid
);
1667 buffer_xml_printf (buffer
, "<thread id=\"%s\"", ptid_s
);
1671 sprintf (core_s
, "%d", core
);
1672 buffer_xml_printf (buffer
, " core=\"%s\"", core_s
);
1676 buffer_xml_printf (buffer
, " name=\"%s\"", name
);
1680 char *handle_s
= (char *) alloca (handle_len
* 2 + 1);
1681 bin2hex (handle
, handle_s
, handle_len
);
1682 buffer_xml_printf (buffer
, " handle=\"%s\"", handle_s
);
1685 buffer_xml_printf (buffer
, "/>\n");
1688 /* Helper for handle_qxfer_threads. */
1691 handle_qxfer_threads_proper (struct buffer
*buffer
)
1693 buffer_grow_str (buffer
, "<threads>\n");
1695 for_each_thread ([&] (thread_info
*thread
)
1697 handle_qxfer_threads_worker (thread
, buffer
);
1700 buffer_grow_str0 (buffer
, "</threads>\n");
1703 /* Handle qXfer:threads:read. */
1706 handle_qxfer_threads (const char *annex
,
1707 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1708 ULONGEST offset
, LONGEST len
)
1710 static char *result
= 0;
1711 static unsigned int result_length
= 0;
1713 if (writebuf
!= NULL
)
1716 if (annex
[0] != '\0')
1721 struct buffer buffer
;
1722 /* When asked for data at offset 0, generate everything and store into
1723 'result'. Successive reads will be served off 'result'. */
1727 buffer_init (&buffer
);
1729 handle_qxfer_threads_proper (&buffer
);
1731 result
= buffer_finish (&buffer
);
1732 result_length
= strlen (result
);
1733 buffer_free (&buffer
);
1736 if (offset
>= result_length
)
1738 /* We're out of data. */
1745 if (len
> result_length
- offset
)
1746 len
= result_length
- offset
;
1748 memcpy (readbuf
, result
+ offset
, len
);
1753 /* Handle qXfer:traceframe-info:read. */
1756 handle_qxfer_traceframe_info (const char *annex
,
1757 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1758 ULONGEST offset
, LONGEST len
)
1760 client_state
&cs
= get_client_state ();
1761 static char *result
= 0;
1762 static unsigned int result_length
= 0;
1764 if (writebuf
!= NULL
)
1767 if (!target_running () || annex
[0] != '\0' || cs
.current_traceframe
== -1)
1772 struct buffer buffer
;
1774 /* When asked for data at offset 0, generate everything and
1775 store into 'result'. Successive reads will be served off
1779 buffer_init (&buffer
);
1781 traceframe_read_info (cs
.current_traceframe
, &buffer
);
1783 result
= buffer_finish (&buffer
);
1784 result_length
= strlen (result
);
1785 buffer_free (&buffer
);
1788 if (offset
>= result_length
)
1790 /* We're out of data. */
1797 if (len
> result_length
- offset
)
1798 len
= result_length
- offset
;
1800 memcpy (readbuf
, result
+ offset
, len
);
1804 /* Handle qXfer:fdpic:read. */
1807 handle_qxfer_fdpic (const char *annex
, gdb_byte
*readbuf
,
1808 const gdb_byte
*writebuf
, ULONGEST offset
, LONGEST len
)
1810 if (the_target
->read_loadmap
== NULL
)
1813 if (current_thread
== NULL
)
1816 return (*the_target
->read_loadmap
) (annex
, offset
, readbuf
, len
);
1819 /* Handle qXfer:btrace:read. */
1822 handle_qxfer_btrace (const char *annex
,
1823 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1824 ULONGEST offset
, LONGEST len
)
1826 client_state
&cs
= get_client_state ();
1827 static struct buffer cache
;
1828 struct thread_info
*thread
;
1829 enum btrace_read_type type
;
1832 if (writebuf
!= NULL
)
1835 if (cs
.general_thread
== null_ptid
1836 || cs
.general_thread
== minus_one_ptid
)
1838 strcpy (cs
.own_buf
, "E.Must select a single thread.");
1842 thread
= find_thread_ptid (cs
.general_thread
);
1845 strcpy (cs
.own_buf
, "E.No such thread.");
1849 if (thread
->btrace
== NULL
)
1851 strcpy (cs
.own_buf
, "E.Btrace not enabled.");
1855 if (strcmp (annex
, "all") == 0)
1856 type
= BTRACE_READ_ALL
;
1857 else if (strcmp (annex
, "new") == 0)
1858 type
= BTRACE_READ_NEW
;
1859 else if (strcmp (annex
, "delta") == 0)
1860 type
= BTRACE_READ_DELTA
;
1863 strcpy (cs
.own_buf
, "E.Bad annex.");
1869 buffer_free (&cache
);
1873 result
= target_read_btrace (thread
->btrace
, &cache
, type
);
1875 memcpy (cs
.own_buf
, cache
.buffer
, cache
.used_size
);
1877 CATCH (exception
, RETURN_MASK_ERROR
)
1879 sprintf (cs
.own_buf
, "E.%s", exception
.message
);
1887 else if (offset
> cache
.used_size
)
1889 buffer_free (&cache
);
1893 if (len
> cache
.used_size
- offset
)
1894 len
= cache
.used_size
- offset
;
1896 memcpy (readbuf
, cache
.buffer
+ offset
, len
);
1901 /* Handle qXfer:btrace-conf:read. */
1904 handle_qxfer_btrace_conf (const char *annex
,
1905 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1906 ULONGEST offset
, LONGEST len
)
1908 client_state
&cs
= get_client_state ();
1909 static struct buffer cache
;
1910 struct thread_info
*thread
;
1913 if (writebuf
!= NULL
)
1916 if (annex
[0] != '\0')
1919 if (cs
.general_thread
== null_ptid
1920 || cs
.general_thread
== minus_one_ptid
)
1922 strcpy (cs
.own_buf
, "E.Must select a single thread.");
1926 thread
= find_thread_ptid (cs
.general_thread
);
1929 strcpy (cs
.own_buf
, "E.No such thread.");
1933 if (thread
->btrace
== NULL
)
1935 strcpy (cs
.own_buf
, "E.Btrace not enabled.");
1941 buffer_free (&cache
);
1945 result
= target_read_btrace_conf (thread
->btrace
, &cache
);
1947 memcpy (cs
.own_buf
, cache
.buffer
, cache
.used_size
);
1949 CATCH (exception
, RETURN_MASK_ERROR
)
1951 sprintf (cs
.own_buf
, "E.%s", exception
.message
);
1959 else if (offset
> cache
.used_size
)
1961 buffer_free (&cache
);
1965 if (len
> cache
.used_size
- offset
)
1966 len
= cache
.used_size
- offset
;
1968 memcpy (readbuf
, cache
.buffer
+ offset
, len
);
1973 static const struct qxfer qxfer_packets
[] =
1975 { "auxv", handle_qxfer_auxv
},
1976 { "btrace", handle_qxfer_btrace
},
1977 { "btrace-conf", handle_qxfer_btrace_conf
},
1978 { "exec-file", handle_qxfer_exec_file
},
1979 { "fdpic", handle_qxfer_fdpic
},
1980 { "features", handle_qxfer_features
},
1981 { "libraries", handle_qxfer_libraries
},
1982 { "libraries-svr4", handle_qxfer_libraries_svr4
},
1983 { "osdata", handle_qxfer_osdata
},
1984 { "siginfo", handle_qxfer_siginfo
},
1985 { "spu", handle_qxfer_spu
},
1986 { "statictrace", handle_qxfer_statictrace
},
1987 { "threads", handle_qxfer_threads
},
1988 { "traceframe-info", handle_qxfer_traceframe_info
},
1992 handle_qxfer (char *own_buf
, int packet_len
, int *new_packet_len_p
)
2000 if (!startswith (own_buf
, "qXfer:"))
2003 /* Grab the object, r/w and annex. */
2004 if (decode_xfer (own_buf
+ 6, &object
, &rw
, &annex
, &offset
) < 0)
2006 write_enn (own_buf
);
2011 i
< sizeof (qxfer_packets
) / sizeof (qxfer_packets
[0]);
2014 const struct qxfer
*q
= &qxfer_packets
[i
];
2016 if (strcmp (object
, q
->object
) == 0)
2018 if (strcmp (rw
, "read") == 0)
2020 unsigned char *data
;
2025 /* Grab the offset and length. */
2026 if (decode_xfer_read (offset
, &ofs
, &len
) < 0)
2028 write_enn (own_buf
);
2032 /* Read one extra byte, as an indicator of whether there is
2034 if (len
> PBUFSIZ
- 2)
2036 data
= (unsigned char *) malloc (len
+ 1);
2039 write_enn (own_buf
);
2042 n
= (*q
->xfer
) (annex
, data
, NULL
, ofs
, len
+ 1);
2050 /* Preserve error message. */
2053 write_enn (own_buf
);
2055 *new_packet_len_p
= write_qxfer_response (own_buf
, data
, len
, 1);
2057 *new_packet_len_p
= write_qxfer_response (own_buf
, data
, n
, 0);
2062 else if (strcmp (rw
, "write") == 0)
2067 unsigned char *data
;
2069 strcpy (own_buf
, "E00");
2070 data
= (unsigned char *) malloc (packet_len
- (offset
- own_buf
));
2073 write_enn (own_buf
);
2076 if (decode_xfer_write (offset
, packet_len
- (offset
- own_buf
),
2077 &ofs
, &len
, data
) < 0)
2080 write_enn (own_buf
);
2084 n
= (*q
->xfer
) (annex
, NULL
, data
, ofs
, len
);
2092 /* Preserve error message. */
2095 write_enn (own_buf
);
2097 sprintf (own_buf
, "%x", n
);
2110 /* Compute 32 bit CRC from inferior memory.
2112 On success, return 32 bit CRC.
2113 On failure, return (unsigned long long) -1. */
2115 static unsigned long long
2116 crc32 (CORE_ADDR base
, int len
, unsigned int crc
)
2120 unsigned char byte
= 0;
2122 /* Return failure if memory read fails. */
2123 if (read_inferior_memory (base
, &byte
, 1) != 0)
2124 return (unsigned long long) -1;
2126 crc
= xcrc32 (&byte
, 1, crc
);
2129 return (unsigned long long) crc
;
2132 /* Add supported btrace packets to BUF. */
2135 supported_btrace_packets (char *buf
)
2137 strcat (buf
, ";Qbtrace:bts+");
2138 strcat (buf
, ";Qbtrace-conf:bts:size+");
2139 strcat (buf
, ";Qbtrace:pt+");
2140 strcat (buf
, ";Qbtrace-conf:pt:size+");
2141 strcat (buf
, ";Qbtrace:off+");
2142 strcat (buf
, ";qXfer:btrace:read+");
2143 strcat (buf
, ";qXfer:btrace-conf:read+");
2146 /* Handle all of the extended 'q' packets. */
2149 handle_query (char *own_buf
, int packet_len
, int *new_packet_len_p
)
2151 client_state
&cs
= get_client_state ();
2152 static std::list
<thread_info
*>::const_iterator thread_iter
;
2154 /* Reply the current thread id. */
2155 if (strcmp ("qC", own_buf
) == 0 && !disable_packet_qC
)
2158 require_running_or_return (own_buf
);
2160 if (cs
.general_thread
!= null_ptid
&& cs
.general_thread
!= minus_one_ptid
)
2161 ptid
= cs
.general_thread
;
2164 thread_iter
= all_threads
.begin ();
2165 ptid
= (*thread_iter
)->id
;
2168 sprintf (own_buf
, "QC");
2170 write_ptid (own_buf
, ptid
);
2174 if (strcmp ("qSymbol::", own_buf
) == 0)
2176 struct thread_info
*save_thread
= current_thread
;
2178 /* For qSymbol, GDB only changes the current thread if the
2179 previous current thread was of a different process. So if
2180 the previous thread is gone, we need to pick another one of
2181 the same process. This can happen e.g., if we followed an
2182 exec in a non-leader thread. */
2183 if (current_thread
== NULL
)
2186 = find_any_thread_of_pid (cs
.general_thread
.pid ());
2188 /* Just in case, if we didn't find a thread, then bail out
2189 instead of crashing. */
2190 if (current_thread
== NULL
)
2192 write_enn (own_buf
);
2193 current_thread
= save_thread
;
2198 /* GDB is suggesting new symbols have been loaded. This may
2199 mean a new shared library has been detected as loaded, so
2200 take the opportunity to check if breakpoints we think are
2201 inserted, still are. Note that it isn't guaranteed that
2202 we'll see this when a shared library is loaded, and nor will
2203 we see this for unloads (although breakpoints in unloaded
2204 libraries shouldn't trigger), as GDB may not find symbols for
2205 the library at all. We also re-validate breakpoints when we
2206 see a second GDB breakpoint for the same address, and or when
2207 we access breakpoint shadows. */
2208 validate_breakpoints ();
2210 if (target_supports_tracepoints ())
2211 tracepoint_look_up_symbols ();
2213 if (current_thread
!= NULL
&& the_target
->look_up_symbols
!= NULL
)
2214 (*the_target
->look_up_symbols
) ();
2216 current_thread
= save_thread
;
2218 strcpy (own_buf
, "OK");
2222 if (!disable_packet_qfThreadInfo
)
2224 if (strcmp ("qfThreadInfo", own_buf
) == 0)
2226 require_running_or_return (own_buf
);
2227 thread_iter
= all_threads
.begin ();
2230 ptid_t ptid
= (*thread_iter
)->id
;
2231 write_ptid (own_buf
, ptid
);
2236 if (strcmp ("qsThreadInfo", own_buf
) == 0)
2238 require_running_or_return (own_buf
);
2239 if (thread_iter
!= all_threads
.end ())
2242 ptid_t ptid
= (*thread_iter
)->id
;
2243 write_ptid (own_buf
, ptid
);
2249 sprintf (own_buf
, "l");
2255 if (the_target
->read_offsets
!= NULL
2256 && strcmp ("qOffsets", own_buf
) == 0)
2258 CORE_ADDR text
, data
;
2260 require_running_or_return (own_buf
);
2261 if (the_target
->read_offsets (&text
, &data
))
2262 sprintf (own_buf
, "Text=%lX;Data=%lX;Bss=%lX",
2263 (long)text
, (long)data
, (long)data
);
2265 write_enn (own_buf
);
2270 /* Protocol features query. */
2271 if (startswith (own_buf
, "qSupported")
2272 && (own_buf
[10] == ':' || own_buf
[10] == '\0'))
2274 char *p
= &own_buf
[10];
2275 int gdb_supports_qRelocInsn
= 0;
2277 /* Process each feature being provided by GDB. The first
2278 feature will follow a ':', and latter features will follow
2282 char **qsupported
= NULL
;
2287 /* Two passes, to avoid nested strtok calls in
2288 target_process_qsupported. */
2289 for (p
= strtok (p
+ 1, ";");
2291 p
= strtok (NULL
, ";"))
2294 qsupported
= XRESIZEVEC (char *, qsupported
, count
);
2295 qsupported
[count
- 1] = xstrdup (p
);
2298 for (i
= 0; i
< count
; i
++)
2301 if (strcmp (p
, "multiprocess+") == 0)
2303 /* GDB supports and wants multi-process support if
2305 if (target_supports_multi_process ())
2306 cs
.multi_process
= 1;
2308 else if (strcmp (p
, "qRelocInsn+") == 0)
2310 /* GDB supports relocate instruction requests. */
2311 gdb_supports_qRelocInsn
= 1;
2313 else if (strcmp (p
, "swbreak+") == 0)
2315 /* GDB wants us to report whether a trap is caused
2316 by a software breakpoint and for us to handle PC
2317 adjustment if necessary on this target. */
2318 if (target_supports_stopped_by_sw_breakpoint ())
2319 cs
.swbreak_feature
= 1;
2321 else if (strcmp (p
, "hwbreak+") == 0)
2323 /* GDB wants us to report whether a trap is caused
2324 by a hardware breakpoint. */
2325 if (target_supports_stopped_by_hw_breakpoint ())
2326 cs
.hwbreak_feature
= 1;
2328 else if (strcmp (p
, "fork-events+") == 0)
2330 /* GDB supports and wants fork events if possible. */
2331 if (target_supports_fork_events ())
2332 cs
.report_fork_events
= 1;
2334 else if (strcmp (p
, "vfork-events+") == 0)
2336 /* GDB supports and wants vfork events if possible. */
2337 if (target_supports_vfork_events ())
2338 cs
.report_vfork_events
= 1;
2340 else if (strcmp (p
, "exec-events+") == 0)
2342 /* GDB supports and wants exec events if possible. */
2343 if (target_supports_exec_events ())
2344 cs
.report_exec_events
= 1;
2346 else if (strcmp (p
, "vContSupported+") == 0)
2347 cs
.vCont_supported
= 1;
2348 else if (strcmp (p
, "QThreadEvents+") == 0)
2350 else if (strcmp (p
, "no-resumed+") == 0)
2352 /* GDB supports and wants TARGET_WAITKIND_NO_RESUMED
2354 report_no_resumed
= 1;
2358 /* Move the unknown features all together. */
2359 qsupported
[i
] = NULL
;
2360 qsupported
[unknown
] = p
;
2365 /* Give the target backend a chance to process the unknown
2367 target_process_qsupported (qsupported
, unknown
);
2369 for (i
= 0; i
< count
; i
++)
2370 free (qsupported
[i
]);
2375 "PacketSize=%x;QPassSignals+;QProgramSignals+;"
2376 "QStartupWithShell+;QEnvironmentHexEncoded+;"
2377 "QEnvironmentReset+;QEnvironmentUnset+;"
2381 if (target_supports_catch_syscall ())
2382 strcat (own_buf
, ";QCatchSyscalls+");
2384 if (the_target
->qxfer_libraries_svr4
!= NULL
)
2385 strcat (own_buf
, ";qXfer:libraries-svr4:read+"
2386 ";augmented-libraries-svr4-read+");
2389 /* We do not have any hook to indicate whether the non-SVR4 target
2390 backend supports qXfer:libraries:read, so always report it. */
2391 strcat (own_buf
, ";qXfer:libraries:read+");
2394 if (the_target
->read_auxv
!= NULL
)
2395 strcat (own_buf
, ";qXfer:auxv:read+");
2397 if (the_target
->qxfer_spu
!= NULL
)
2398 strcat (own_buf
, ";qXfer:spu:read+;qXfer:spu:write+");
2400 if (the_target
->qxfer_siginfo
!= NULL
)
2401 strcat (own_buf
, ";qXfer:siginfo:read+;qXfer:siginfo:write+");
2403 if (the_target
->read_loadmap
!= NULL
)
2404 strcat (own_buf
, ";qXfer:fdpic:read+");
2406 /* We always report qXfer:features:read, as targets may
2407 install XML files on a subsequent call to arch_setup.
2408 If we reported to GDB on startup that we don't support
2409 qXfer:feature:read at all, we will never be re-queried. */
2410 strcat (own_buf
, ";qXfer:features:read+");
2412 if (cs
.transport_is_reliable
)
2413 strcat (own_buf
, ";QStartNoAckMode+");
2415 if (the_target
->qxfer_osdata
!= NULL
)
2416 strcat (own_buf
, ";qXfer:osdata:read+");
2418 if (target_supports_multi_process ())
2419 strcat (own_buf
, ";multiprocess+");
2421 if (target_supports_fork_events ())
2422 strcat (own_buf
, ";fork-events+");
2424 if (target_supports_vfork_events ())
2425 strcat (own_buf
, ";vfork-events+");
2427 if (target_supports_exec_events ())
2428 strcat (own_buf
, ";exec-events+");
2430 if (target_supports_non_stop ())
2431 strcat (own_buf
, ";QNonStop+");
2433 if (target_supports_disable_randomization ())
2434 strcat (own_buf
, ";QDisableRandomization+");
2436 strcat (own_buf
, ";qXfer:threads:read+");
2438 if (target_supports_tracepoints ())
2440 strcat (own_buf
, ";ConditionalTracepoints+");
2441 strcat (own_buf
, ";TraceStateVariables+");
2442 strcat (own_buf
, ";TracepointSource+");
2443 strcat (own_buf
, ";DisconnectedTracing+");
2444 if (gdb_supports_qRelocInsn
&& target_supports_fast_tracepoints ())
2445 strcat (own_buf
, ";FastTracepoints+");
2446 strcat (own_buf
, ";StaticTracepoints+");
2447 strcat (own_buf
, ";InstallInTrace+");
2448 strcat (own_buf
, ";qXfer:statictrace:read+");
2449 strcat (own_buf
, ";qXfer:traceframe-info:read+");
2450 strcat (own_buf
, ";EnableDisableTracepoints+");
2451 strcat (own_buf
, ";QTBuffer:size+");
2452 strcat (own_buf
, ";tracenz+");
2455 if (target_supports_hardware_single_step ()
2456 || target_supports_software_single_step () )
2458 strcat (own_buf
, ";ConditionalBreakpoints+");
2460 strcat (own_buf
, ";BreakpointCommands+");
2462 if (target_supports_agent ())
2463 strcat (own_buf
, ";QAgent+");
2465 supported_btrace_packets (own_buf
);
2467 if (target_supports_stopped_by_sw_breakpoint ())
2468 strcat (own_buf
, ";swbreak+");
2470 if (target_supports_stopped_by_hw_breakpoint ())
2471 strcat (own_buf
, ";hwbreak+");
2473 if (the_target
->pid_to_exec_file
!= NULL
)
2474 strcat (own_buf
, ";qXfer:exec-file:read+");
2476 strcat (own_buf
, ";vContSupported+");
2478 strcat (own_buf
, ";QThreadEvents+");
2480 strcat (own_buf
, ";no-resumed+");
2482 /* Reinitialize components as needed for the new connection. */
2483 hostio_handle_new_gdb_connection ();
2484 target_handle_new_gdb_connection ();
2489 /* Thread-local storage support. */
2490 if (the_target
->get_tls_address
!= NULL
2491 && startswith (own_buf
, "qGetTLSAddr:"))
2493 char *p
= own_buf
+ 12;
2494 CORE_ADDR parts
[2], address
= 0;
2496 ptid_t ptid
= null_ptid
;
2498 require_running_or_return (own_buf
);
2500 for (i
= 0; i
< 3; i
++)
2508 p2
= strchr (p
, ',');
2521 ptid
= read_ptid (p
, NULL
);
2523 decode_address (&parts
[i
- 1], p
, len
);
2527 if (p
!= NULL
|| i
< 3)
2531 struct thread_info
*thread
= find_thread_ptid (ptid
);
2536 err
= the_target
->get_tls_address (thread
, parts
[0], parts
[1],
2542 strcpy (own_buf
, paddress(address
));
2547 write_enn (own_buf
);
2551 /* Otherwise, pretend we do not understand this packet. */
2554 /* Windows OS Thread Information Block address support. */
2555 if (the_target
->get_tib_address
!= NULL
2556 && startswith (own_buf
, "qGetTIBAddr:"))
2561 ptid_t ptid
= read_ptid (own_buf
+ 12, &annex
);
2563 n
= (*the_target
->get_tib_address
) (ptid
, &tlb
);
2566 strcpy (own_buf
, paddress(tlb
));
2571 write_enn (own_buf
);
2577 /* Handle "monitor" commands. */
2578 if (startswith (own_buf
, "qRcmd,"))
2580 char *mon
= (char *) malloc (PBUFSIZ
);
2581 int len
= strlen (own_buf
+ 6);
2585 write_enn (own_buf
);
2590 || hex2bin (own_buf
+ 6, (gdb_byte
*) mon
, len
/ 2) != len
/ 2)
2592 write_enn (own_buf
);
2596 mon
[len
/ 2] = '\0';
2600 if (the_target
->handle_monitor_command
== NULL
2601 || (*the_target
->handle_monitor_command
) (mon
) == 0)
2602 /* Default processing. */
2603 handle_monitor_command (mon
, own_buf
);
2609 if (startswith (own_buf
, "qSearch:memory:"))
2611 require_running_or_return (own_buf
);
2612 handle_search_memory (own_buf
, packet_len
);
2616 if (strcmp (own_buf
, "qAttached") == 0
2617 || startswith (own_buf
, "qAttached:"))
2619 struct process_info
*process
;
2621 if (own_buf
[sizeof ("qAttached") - 1])
2623 int pid
= strtoul (own_buf
+ sizeof ("qAttached:") - 1, NULL
, 16);
2624 process
= find_process_pid (pid
);
2628 require_running_or_return (own_buf
);
2629 process
= current_process ();
2632 if (process
== NULL
)
2634 write_enn (own_buf
);
2638 strcpy (own_buf
, process
->attached
? "1" : "0");
2642 if (startswith (own_buf
, "qCRC:"))
2644 /* CRC check (compare-section). */
2648 unsigned long long crc
;
2650 require_running_or_return (own_buf
);
2651 comma
= unpack_varlen_hex (own_buf
+ 5, &base
);
2652 if (*comma
++ != ',')
2654 write_enn (own_buf
);
2657 len
= strtoul (comma
, NULL
, 16);
2658 crc
= crc32 (base
, len
, 0xffffffff);
2659 /* Check for memory failure. */
2660 if (crc
== (unsigned long long) -1)
2662 write_enn (own_buf
);
2665 sprintf (own_buf
, "C%lx", (unsigned long) crc
);
2669 if (handle_qxfer (own_buf
, packet_len
, new_packet_len_p
))
2672 if (target_supports_tracepoints () && handle_tracepoint_query (own_buf
))
2675 /* Otherwise we didn't know what packet it was. Say we didn't
2680 static void gdb_wants_all_threads_stopped (void);
2681 static void resume (struct thread_resume
*actions
, size_t n
);
2683 /* The callback that is passed to visit_actioned_threads. */
2684 typedef int (visit_actioned_threads_callback_ftype
)
2685 (const struct thread_resume
*, struct thread_info
*);
2687 /* Call CALLBACK for any thread to which ACTIONS applies to. Returns
2688 true if CALLBACK returns true. Returns false if no matching thread
2689 is found or CALLBACK results false.
2690 Note: This function is itself a callback for find_thread. */
2693 visit_actioned_threads (thread_info
*thread
,
2694 const struct thread_resume
*actions
,
2696 visit_actioned_threads_callback_ftype
*callback
)
2698 for (size_t i
= 0; i
< num_actions
; i
++)
2700 const struct thread_resume
*action
= &actions
[i
];
2702 if (action
->thread
== minus_one_ptid
2703 || action
->thread
== thread
->id
2704 || ((action
->thread
.pid ()
2705 == thread
->id
.pid ())
2706 && action
->thread
.lwp () == -1))
2708 if ((*callback
) (action
, thread
))
2716 /* Callback for visit_actioned_threads. If the thread has a pending
2717 status to report, report it now. */
2720 handle_pending_status (const struct thread_resume
*resumption
,
2721 struct thread_info
*thread
)
2723 client_state
&cs
= get_client_state ();
2724 if (thread
->status_pending_p
)
2726 thread
->status_pending_p
= 0;
2728 cs
.last_status
= thread
->last_status
;
2729 cs
.last_ptid
= thread
->id
;
2730 prepare_resume_reply (cs
.own_buf
, cs
.last_ptid
, &cs
.last_status
);
2736 /* Parse vCont packets. */
2738 handle_v_cont (char *own_buf
)
2742 struct thread_resume
*resume_info
;
2743 struct thread_resume default_action
{ null_ptid
};
2745 /* Count the number of semicolons in the packet. There should be one
2746 for every action. */
2752 p
= strchr (p
, ';');
2755 resume_info
= (struct thread_resume
*) malloc (n
* sizeof (resume_info
[0]));
2756 if (resume_info
== NULL
)
2764 memset (&resume_info
[i
], 0, sizeof resume_info
[i
]);
2766 if (p
[0] == 's' || p
[0] == 'S')
2767 resume_info
[i
].kind
= resume_step
;
2768 else if (p
[0] == 'r')
2769 resume_info
[i
].kind
= resume_step
;
2770 else if (p
[0] == 'c' || p
[0] == 'C')
2771 resume_info
[i
].kind
= resume_continue
;
2772 else if (p
[0] == 't')
2773 resume_info
[i
].kind
= resume_stop
;
2777 if (p
[0] == 'S' || p
[0] == 'C')
2780 int sig
= strtol (p
+ 1, &q
, 16);
2785 if (!gdb_signal_to_host_p ((enum gdb_signal
) sig
))
2787 resume_info
[i
].sig
= gdb_signal_to_host ((enum gdb_signal
) sig
);
2789 else if (p
[0] == 'r')
2793 p
= unpack_varlen_hex (p
+ 1, &addr
);
2794 resume_info
[i
].step_range_start
= addr
;
2799 p
= unpack_varlen_hex (p
+ 1, &addr
);
2800 resume_info
[i
].step_range_end
= addr
;
2809 resume_info
[i
].thread
= minus_one_ptid
;
2810 default_action
= resume_info
[i
];
2812 /* Note: we don't increment i here, we'll overwrite this entry
2813 the next time through. */
2815 else if (p
[0] == ':')
2818 ptid_t ptid
= read_ptid (p
+ 1, &q
);
2823 if (p
[0] != ';' && p
[0] != 0)
2826 resume_info
[i
].thread
= ptid
;
2833 resume_info
[i
] = default_action
;
2835 resume (resume_info
, n
);
2840 write_enn (own_buf
);
2845 /* Resume target with ACTIONS, an array of NUM_ACTIONS elements. */
2848 resume (struct thread_resume
*actions
, size_t num_actions
)
2850 client_state
&cs
= get_client_state ();
2853 /* Check if among the threads that GDB wants actioned, there's
2854 one with a pending status to report. If so, skip actually
2855 resuming/stopping and report the pending event
2858 thread_info
*thread_with_status
= find_thread ([&] (thread_info
*thread
)
2860 return visit_actioned_threads (thread
, actions
, num_actions
,
2861 handle_pending_status
);
2864 if (thread_with_status
!= NULL
)
2870 (*the_target
->resume
) (actions
, num_actions
);
2873 write_ok (cs
.own_buf
);
2876 cs
.last_ptid
= mywait (minus_one_ptid
, &cs
.last_status
, 0, 1);
2878 if (cs
.last_status
.kind
== TARGET_WAITKIND_NO_RESUMED
2879 && !report_no_resumed
)
2881 /* The client does not support this stop reply. At least
2883 sprintf (cs
.own_buf
, "E.No unwaited-for children left.");
2884 disable_async_io ();
2888 if (cs
.last_status
.kind
!= TARGET_WAITKIND_EXITED
2889 && cs
.last_status
.kind
!= TARGET_WAITKIND_SIGNALLED
2890 && cs
.last_status
.kind
!= TARGET_WAITKIND_NO_RESUMED
)
2891 current_thread
->last_status
= cs
.last_status
;
2893 /* From the client's perspective, all-stop mode always stops all
2894 threads implicitly (and the target backend has already done
2895 so by now). Tag all threads as "want-stopped", so we don't
2896 resume them implicitly without the client telling us to. */
2897 gdb_wants_all_threads_stopped ();
2898 prepare_resume_reply (cs
.own_buf
, cs
.last_ptid
, &cs
.last_status
);
2899 disable_async_io ();
2901 if (cs
.last_status
.kind
== TARGET_WAITKIND_EXITED
2902 || cs
.last_status
.kind
== TARGET_WAITKIND_SIGNALLED
)
2903 target_mourn_inferior (cs
.last_ptid
);
2907 /* Attach to a new program. Return 1 if successful, 0 if failure. */
2909 handle_v_attach (char *own_buf
)
2911 client_state
&cs
= get_client_state ();
2914 pid
= strtol (own_buf
+ 8, NULL
, 16);
2915 if (pid
!= 0 && attach_inferior (pid
) == 0)
2917 /* Don't report shared library events after attaching, even if
2918 some libraries are preloaded. GDB will always poll the
2919 library list. Avoids the "stopped by shared library event"
2920 notice on the GDB side. */
2925 /* In non-stop, we don't send a resume reply. Stop events
2926 will follow up using the normal notification
2931 prepare_resume_reply (own_buf
, cs
.last_ptid
, &cs
.last_status
);
2937 write_enn (own_buf
);
2942 /* Run a new program. Return 1 if successful, 0 if failure. */
2944 handle_v_run (char *own_buf
)
2946 client_state
&cs
= get_client_state ();
2948 std::vector
<char *> new_argv
;
2949 char *new_program_name
= NULL
;
2953 for (p
= own_buf
+ strlen ("vRun;"); p
&& *p
; p
= strchr (p
, ';'))
2959 for (i
= 0, p
= own_buf
+ strlen ("vRun;"); *p
; p
= next_p
, ++i
)
2961 next_p
= strchr (p
, ';');
2963 next_p
= p
+ strlen (p
);
2965 if (i
== 0 && p
== next_p
)
2967 /* No program specified. */
2968 new_program_name
= NULL
;
2970 else if (p
== next_p
)
2972 /* Empty argument. */
2973 new_argv
.push_back (xstrdup ("''"));
2977 size_t len
= (next_p
- p
) / 2;
2978 /* ARG is the unquoted argument received via the RSP. */
2979 char *arg
= (char *) xmalloc (len
+ 1);
2980 /* FULL_ARGS will contain the quoted version of ARG. */
2981 char *full_arg
= (char *) xmalloc ((len
+ 1) * 2);
2982 /* These are pointers used to navigate the strings above. */
2983 char *tmp_arg
= arg
;
2984 char *tmp_full_arg
= full_arg
;
2987 hex2bin (p
, (gdb_byte
*) arg
, len
);
2990 while (*tmp_arg
!= '\0')
2996 *tmp_full_arg
= '\'';
3002 /* Quote single quote. */
3003 *tmp_full_arg
= '\\';
3011 *tmp_full_arg
= *tmp_arg
;
3017 *tmp_full_arg
++ = '\'';
3019 /* Finish FULL_ARG and push it into the vector containing
3021 *tmp_full_arg
= '\0';
3023 new_program_name
= full_arg
;
3025 new_argv
.push_back (full_arg
);
3031 new_argv
.push_back (NULL
);
3033 if (new_program_name
== NULL
)
3035 /* GDB didn't specify a program to run. Use the program from the
3036 last run with the new argument list. */
3037 if (program_path
.get () == NULL
)
3039 write_enn (own_buf
);
3040 free_vector_argv (new_argv
);
3045 program_path
.set (gdb::unique_xmalloc_ptr
<char> (new_program_name
));
3047 /* Free the old argv and install the new one. */
3048 free_vector_argv (program_args
);
3049 program_args
= new_argv
;
3051 create_inferior (program_path
.get (), program_args
);
3053 if (cs
.last_status
.kind
== TARGET_WAITKIND_STOPPED
)
3055 prepare_resume_reply (own_buf
, cs
.last_ptid
, &cs
.last_status
);
3057 /* In non-stop, sending a resume reply doesn't set the general
3058 thread, but GDB assumes a vRun sets it (this is so GDB can
3059 query which is the main thread of the new inferior. */
3061 cs
.general_thread
= cs
.last_ptid
;
3067 write_enn (own_buf
);
3072 /* Kill process. Return 1 if successful, 0 if failure. */
3074 handle_v_kill (char *own_buf
)
3076 client_state
&cs
= get_client_state ();
3078 char *p
= &own_buf
[6];
3079 if (cs
.multi_process
)
3080 pid
= strtol (p
, NULL
, 16);
3083 if (pid
!= 0 && kill_inferior (pid
) == 0)
3085 cs
.last_status
.kind
= TARGET_WAITKIND_SIGNALLED
;
3086 cs
.last_status
.value
.sig
= GDB_SIGNAL_KILL
;
3087 cs
.last_ptid
= ptid_t (pid
);
3088 discard_queued_stop_replies (cs
.last_ptid
);
3094 write_enn (own_buf
);
3099 /* Handle all of the extended 'v' packets. */
3101 handle_v_requests (char *own_buf
, int packet_len
, int *new_packet_len
)
3103 client_state
&cs
= get_client_state ();
3104 if (!disable_packet_vCont
)
3106 if (strcmp (own_buf
, "vCtrlC") == 0)
3108 (*the_target
->request_interrupt
) ();
3113 if (startswith (own_buf
, "vCont;"))
3115 handle_v_cont (own_buf
);
3119 if (startswith (own_buf
, "vCont?"))
3121 strcpy (own_buf
, "vCont;c;C;t");
3123 if (target_supports_hardware_single_step ()
3124 || target_supports_software_single_step ()
3125 || !cs
.vCont_supported
)
3127 /* If target supports single step either by hardware or by
3128 software, add actions s and S to the list of supported
3129 actions. On the other hand, if GDB doesn't request the
3130 supported vCont actions in qSupported packet, add s and
3131 S to the list too. */
3132 own_buf
= own_buf
+ strlen (own_buf
);
3133 strcpy (own_buf
, ";s;S");
3136 if (target_supports_range_stepping ())
3138 own_buf
= own_buf
+ strlen (own_buf
);
3139 strcpy (own_buf
, ";r");
3145 if (startswith (own_buf
, "vFile:")
3146 && handle_vFile (own_buf
, packet_len
, new_packet_len
))
3149 if (startswith (own_buf
, "vAttach;"))
3151 if ((!extended_protocol
|| !cs
.multi_process
) && target_running ())
3153 fprintf (stderr
, "Already debugging a process\n");
3154 write_enn (own_buf
);
3157 handle_v_attach (own_buf
);
3161 if (startswith (own_buf
, "vRun;"))
3163 if ((!extended_protocol
|| !cs
.multi_process
) && target_running ())
3165 fprintf (stderr
, "Already debugging a process\n");
3166 write_enn (own_buf
);
3169 handle_v_run (own_buf
);
3173 if (startswith (own_buf
, "vKill;"))
3175 if (!target_running ())
3177 fprintf (stderr
, "No process to kill\n");
3178 write_enn (own_buf
);
3181 handle_v_kill (own_buf
);
3185 if (handle_notif_ack (own_buf
, packet_len
))
3188 /* Otherwise we didn't know what packet it was. Say we didn't
3194 /* Resume thread and wait for another event. In non-stop mode,
3195 don't really wait here, but return immediatelly to the event
3198 myresume (char *own_buf
, int step
, int sig
)
3200 client_state
&cs
= get_client_state ();
3201 struct thread_resume resume_info
[2];
3203 int valid_cont_thread
;
3205 valid_cont_thread
= (cs
.cont_thread
!= null_ptid
3206 && cs
.cont_thread
!= minus_one_ptid
);
3208 if (step
|| sig
|| valid_cont_thread
)
3210 resume_info
[0].thread
= current_ptid
;
3212 resume_info
[0].kind
= resume_step
;
3214 resume_info
[0].kind
= resume_continue
;
3215 resume_info
[0].sig
= sig
;
3219 if (!valid_cont_thread
)
3221 resume_info
[n
].thread
= minus_one_ptid
;
3222 resume_info
[n
].kind
= resume_continue
;
3223 resume_info
[n
].sig
= 0;
3227 resume (resume_info
, n
);
3230 /* Callback for for_each_thread. Make a new stop reply for each
3234 queue_stop_reply_callback (thread_info
*thread
)
3236 /* For now, assume targets that don't have this callback also don't
3237 manage the thread's last_status field. */
3238 if (the_target
->thread_stopped
== NULL
)
3240 struct vstop_notif
*new_notif
= XNEW (struct vstop_notif
);
3242 new_notif
->ptid
= thread
->id
;
3243 new_notif
->status
= thread
->last_status
;
3244 /* Pass the last stop reply back to GDB, but don't notify
3246 notif_event_enque (¬if_stop
,
3247 (struct notif_event
*) new_notif
);
3251 if (thread_stopped (thread
))
3255 std::string status_string
3256 = target_waitstatus_to_string (&thread
->last_status
);
3258 debug_printf ("Reporting thread %s as already stopped with %s\n",
3259 target_pid_to_str (thread
->id
),
3260 status_string
.c_str ());
3263 gdb_assert (thread
->last_status
.kind
!= TARGET_WAITKIND_IGNORE
);
3265 /* Pass the last stop reply back to GDB, but don't notify
3267 queue_stop_reply (thread
->id
, &thread
->last_status
);
3272 /* Set this inferior threads's state as "want-stopped". We won't
3273 resume this thread until the client gives us another action for
3277 gdb_wants_thread_stopped (thread_info
*thread
)
3279 thread
->last_resume_kind
= resume_stop
;
3281 if (thread
->last_status
.kind
== TARGET_WAITKIND_IGNORE
)
3283 /* Most threads are stopped implicitly (all-stop); tag that with
3285 thread
->last_status
.kind
= TARGET_WAITKIND_STOPPED
;
3286 thread
->last_status
.value
.sig
= GDB_SIGNAL_0
;
3290 /* Set all threads' states as "want-stopped". */
3293 gdb_wants_all_threads_stopped (void)
3295 for_each_thread (gdb_wants_thread_stopped
);
3298 /* Callback for for_each_thread. If the thread is stopped with an
3299 interesting event, mark it as having a pending event. */
3302 set_pending_status_callback (thread_info
*thread
)
3304 if (thread
->last_status
.kind
!= TARGET_WAITKIND_STOPPED
3305 || (thread
->last_status
.value
.sig
!= GDB_SIGNAL_0
3306 /* A breakpoint, watchpoint or finished step from a previous
3307 GDB run isn't considered interesting for a new GDB run.
3308 If we left those pending, the new GDB could consider them
3309 random SIGTRAPs. This leaves out real async traps. We'd
3310 have to peek into the (target-specific) siginfo to
3311 distinguish those. */
3312 && thread
->last_status
.value
.sig
!= GDB_SIGNAL_TRAP
))
3313 thread
->status_pending_p
= 1;
3316 /* Status handler for the '?' packet. */
3319 handle_status (char *own_buf
)
3321 client_state
&cs
= get_client_state ();
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
, cs
.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 (cs
.last_status
.kind
!= TARGET_WAITKIND_IGNORE
3360 && cs
.last_status
.kind
!= TARGET_WAITKIND_EXITED
3361 && cs
.last_status
.kind
!= TARGET_WAITKIND_SIGNALLED
)
3362 thread
= find_thread_ptid (cs
.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 cs
.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 (ptid_t (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 (process
);
3531 kill_inferior (pid
);
3533 discard_queued_stop_replies (ptid_t (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 client_state
&cs
= get_client_state ();
3582 if (current_directory
== NULL
)
3584 error (_("Could not find current working directory: %s"),
3585 safe_strerror (errno
));
3588 while (*next_arg
!= NULL
&& **next_arg
== '-')
3590 if (strcmp (*next_arg
, "--version") == 0)
3592 gdbserver_version ();
3595 else if (strcmp (*next_arg
, "--help") == 0)
3597 gdbserver_usage (stdout
);
3600 else if (strcmp (*next_arg
, "--attach") == 0)
3602 else if (strcmp (*next_arg
, "--multi") == 0)
3604 else if (strcmp (*next_arg
, "--wrapper") == 0)
3611 while (*next_arg
!= NULL
&& strcmp (*next_arg
, "--") != 0)
3613 wrapper_argv
+= *next_arg
;
3614 wrapper_argv
+= ' ';
3618 if (!wrapper_argv
.empty ())
3620 /* Erase the last whitespace. */
3621 wrapper_argv
.erase (wrapper_argv
.end () - 1);
3624 if (next_arg
== tmp
|| *next_arg
== NULL
)
3626 gdbserver_usage (stderr
);
3630 /* Consume the "--". */
3633 else if (strcmp (*next_arg
, "--debug") == 0)
3635 else if (startswith (*next_arg
, "--debug-format="))
3637 std::string error_msg
3638 = parse_debug_format_options ((*next_arg
)
3639 + sizeof ("--debug-format=") - 1, 0);
3641 if (!error_msg
.empty ())
3643 fprintf (stderr
, "%s", error_msg
.c_str ());
3647 else if (strcmp (*next_arg
, "--remote-debug") == 0)
3649 else if (strcmp (*next_arg
, "--disable-packet") == 0)
3651 gdbserver_show_disableable (stdout
);
3654 else if (startswith (*next_arg
, "--disable-packet="))
3656 char *packets
, *tok
;
3658 packets
= *next_arg
+= sizeof ("--disable-packet=") - 1;
3659 for (tok
= strtok (packets
, ",");
3661 tok
= strtok (NULL
, ","))
3663 if (strcmp ("vCont", tok
) == 0)
3664 disable_packet_vCont
= 1;
3665 else if (strcmp ("Tthread", tok
) == 0)
3666 disable_packet_Tthread
= 1;
3667 else if (strcmp ("qC", tok
) == 0)
3668 disable_packet_qC
= 1;
3669 else if (strcmp ("qfThreadInfo", tok
) == 0)
3670 disable_packet_qfThreadInfo
= 1;
3671 else if (strcmp ("threads", tok
) == 0)
3673 disable_packet_vCont
= 1;
3674 disable_packet_Tthread
= 1;
3675 disable_packet_qC
= 1;
3676 disable_packet_qfThreadInfo
= 1;
3680 fprintf (stderr
, "Don't know how to disable \"%s\".\n\n",
3682 gdbserver_show_disableable (stderr
);
3687 else if (strcmp (*next_arg
, "-") == 0)
3689 /* "-" specifies a stdio connection and is a form of port
3691 port
= STDIO_CONNECTION_NAME
;
3695 else if (strcmp (*next_arg
, "--disable-randomization") == 0)
3696 cs
.disable_randomization
= 1;
3697 else if (strcmp (*next_arg
, "--no-disable-randomization") == 0)
3698 cs
.disable_randomization
= 0;
3699 else if (strcmp (*next_arg
, "--startup-with-shell") == 0)
3700 startup_with_shell
= true;
3701 else if (strcmp (*next_arg
, "--no-startup-with-shell") == 0)
3702 startup_with_shell
= false;
3703 else if (strcmp (*next_arg
, "--once") == 0)
3705 else if (strcmp (*next_arg
, "--selftest") == 0)
3707 else if (startswith (*next_arg
, "--selftest="))
3711 selftest_filter
= *next_arg
+ strlen ("--selftest=");
3716 fprintf (stderr
, "Unknown argument: %s\n", *next_arg
);
3729 if ((port
== NULL
|| (!attach
&& !multi_mode
&& *next_arg
== NULL
))
3732 gdbserver_usage (stderr
);
3736 /* Remember stdio descriptors. LISTEN_DESC must not be listed, it will be
3737 opened by remote_prepare. */
3740 save_original_signals_state (false);
3742 /* We need to know whether the remote connection is stdio before
3743 starting the inferior. Inferiors created in this scenario have
3744 stdin,stdout redirected. So do this here before we call
3747 remote_prepare (port
);
3752 /* --attach used to come after PORT, so allow it there for
3754 if (*next_arg
!= NULL
&& strcmp (*next_arg
, "--attach") == 0)
3761 && (*next_arg
== NULL
3762 || (*next_arg
)[0] == '\0'
3763 || (pid
= strtoul (*next_arg
, &arg_end
, 0)) == 0
3765 || next_arg
[1] != NULL
))
3770 gdbserver_usage (stderr
);
3774 /* Gather information about the environment. */
3775 our_environ
= gdb_environ::from_host_environ ();
3777 initialize_async_io ();
3779 have_job_control ();
3780 initialize_event_loop ();
3781 if (target_supports_tracepoints ())
3782 initialize_tracepoint ();
3783 initialize_notif ();
3785 mem_buf
= (unsigned char *) xmalloc (PBUFSIZ
);
3790 selftests::run_tests (selftest_filter
);
3792 printf (_("Selftests are not available in a non-development build.\n"));
3794 throw_quit ("Quit");
3797 if (pid
== 0 && *next_arg
!= NULL
)
3801 n
= argc
- (next_arg
- argv
);
3802 program_path
.set (gdb::unique_xmalloc_ptr
<char> (xstrdup (next_arg
[0])));
3803 for (i
= 1; i
< n
; i
++)
3804 program_args
.push_back (xstrdup (next_arg
[i
]));
3805 program_args
.push_back (NULL
);
3807 /* Wait till we are at first instruction in program. */
3808 create_inferior (program_path
.get (), program_args
);
3810 /* We are now (hopefully) stopped at the first instruction of
3811 the target process. This assumes that the target process was
3812 successfully created. */
3816 if (attach_inferior (pid
) == -1)
3817 error ("Attaching not supported on this target");
3819 /* Otherwise succeeded. */
3823 cs
.last_status
.kind
= TARGET_WAITKIND_EXITED
;
3824 cs
.last_status
.value
.integer
= 0;
3825 cs
.last_ptid
= minus_one_ptid
;
3827 make_cleanup (detach_or_kill_for_exit_cleanup
, NULL
);
3829 /* Don't report shared library events on the initial connection,
3830 even if some libraries are preloaded. Avoids the "stopped by
3831 shared library event" notice on gdb side. */
3834 if (cs
.last_status
.kind
== TARGET_WAITKIND_EXITED
3835 || cs
.last_status
.kind
== TARGET_WAITKIND_SIGNALLED
)
3840 if (!was_running
&& !multi_mode
)
3841 error ("No program to debug");
3846 cs
.multi_process
= 0;
3847 cs
.report_fork_events
= 0;
3848 cs
.report_vfork_events
= 0;
3849 cs
.report_exec_events
= 0;
3850 /* Be sure we're out of tfind mode. */
3851 cs
.current_traceframe
= -1;
3852 cs
.cont_thread
= null_ptid
;
3853 cs
.swbreak_feature
= 0;
3854 cs
.hwbreak_feature
= 0;
3855 cs
.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 (cs
.own_buf
);
3932 putpkt (cs
.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)
4027 client_state
&cs
= get_client_state ();
4034 int new_packet_len
= -1;
4036 disable_async_io ();
4038 response_needed
= 0;
4039 packet_len
= getpkt (cs
.own_buf
);
4040 if (packet_len
<= 0)
4043 /* Force an event loop break. */
4046 response_needed
= 1;
4048 char ch
= cs
.own_buf
[0];
4052 handle_query (cs
.own_buf
, packet_len
, &new_packet_len
);
4055 handle_general_set (cs
.own_buf
);
4058 handle_detach (cs
.own_buf
);
4061 extended_protocol
= 1;
4062 write_ok (cs
.own_buf
);
4065 handle_status (cs
.own_buf
);
4068 if (cs
.own_buf
[1] == 'c' || cs
.own_buf
[1] == 'g' || cs
.own_buf
[1] == 's')
4070 require_running_or_break (cs
.own_buf
);
4072 ptid_t thread_id
= read_ptid (&cs
.own_buf
[2], NULL
);
4074 if (thread_id
== null_ptid
|| thread_id
== minus_one_ptid
)
4075 thread_id
= null_ptid
;
4076 else if (thread_id
.is_pid ())
4078 /* The ptid represents a pid. */
4079 thread_info
*thread
= find_any_thread_of_pid (thread_id
.pid ());
4083 write_enn (cs
.own_buf
);
4087 thread_id
= thread
->id
;
4091 /* The ptid represents a lwp/tid. */
4092 if (find_thread_ptid (thread_id
) == NULL
)
4094 write_enn (cs
.own_buf
);
4099 if (cs
.own_buf
[1] == 'g')
4101 if (thread_id
== null_ptid
)
4103 /* GDB is telling us to choose any thread. Check if
4104 the currently selected thread is still valid. If
4105 it is not, select the first available. */
4106 thread_info
*thread
= find_thread_ptid (cs
.general_thread
);
4108 thread
= get_first_thread ();
4109 thread_id
= thread
->id
;
4112 cs
.general_thread
= thread_id
;
4113 set_desired_thread ();
4114 gdb_assert (current_thread
!= NULL
);
4116 else if (cs
.own_buf
[1] == 'c')
4117 cs
.cont_thread
= thread_id
;
4119 write_ok (cs
.own_buf
);
4123 /* Silently ignore it so that gdb can extend the protocol
4124 without compatibility headaches. */
4125 cs
.own_buf
[0] = '\0';
4129 require_running_or_break (cs
.own_buf
);
4130 if (cs
.current_traceframe
>= 0)
4132 struct regcache
*regcache
4133 = new_register_cache (current_target_desc ());
4135 if (fetch_traceframe_registers (cs
.current_traceframe
,
4137 registers_to_string (regcache
, cs
.own_buf
);
4139 write_enn (cs
.own_buf
);
4140 free_register_cache (regcache
);
4144 struct regcache
*regcache
;
4146 if (!set_desired_thread ())
4147 write_enn (cs
.own_buf
);
4150 regcache
= get_thread_regcache (current_thread
, 1);
4151 registers_to_string (regcache
, cs
.own_buf
);
4156 require_running_or_break (cs
.own_buf
);
4157 if (cs
.current_traceframe
>= 0)
4158 write_enn (cs
.own_buf
);
4161 struct regcache
*regcache
;
4163 if (!set_desired_thread ())
4164 write_enn (cs
.own_buf
);
4167 regcache
= get_thread_regcache (current_thread
, 1);
4168 registers_from_string (regcache
, &cs
.own_buf
[1]);
4169 write_ok (cs
.own_buf
);
4174 require_running_or_break (cs
.own_buf
);
4175 decode_m_packet (&cs
.own_buf
[1], &mem_addr
, &len
);
4176 res
= gdb_read_memory (mem_addr
, mem_buf
, len
);
4178 write_enn (cs
.own_buf
);
4180 bin2hex (mem_buf
, cs
.own_buf
, res
);
4183 require_running_or_break (cs
.own_buf
);
4184 decode_M_packet (&cs
.own_buf
[1], &mem_addr
, &len
, &mem_buf
);
4185 if (gdb_write_memory (mem_addr
, mem_buf
, len
) == 0)
4186 write_ok (cs
.own_buf
);
4188 write_enn (cs
.own_buf
);
4191 require_running_or_break (cs
.own_buf
);
4192 if (decode_X_packet (&cs
.own_buf
[1], packet_len
- 1,
4193 &mem_addr
, &len
, &mem_buf
) < 0
4194 || gdb_write_memory (mem_addr
, mem_buf
, len
) != 0)
4195 write_enn (cs
.own_buf
);
4197 write_ok (cs
.own_buf
);
4200 require_running_or_break (cs
.own_buf
);
4201 hex2bin (cs
.own_buf
+ 1, &sig
, 1);
4202 if (gdb_signal_to_host_p ((enum gdb_signal
) sig
))
4203 signal
= gdb_signal_to_host ((enum gdb_signal
) sig
);
4206 myresume (cs
.own_buf
, 0, signal
);
4209 require_running_or_break (cs
.own_buf
);
4210 hex2bin (cs
.own_buf
+ 1, &sig
, 1);
4211 if (gdb_signal_to_host_p ((enum gdb_signal
) sig
))
4212 signal
= gdb_signal_to_host ((enum gdb_signal
) sig
);
4215 myresume (cs
.own_buf
, 1, signal
);
4218 require_running_or_break (cs
.own_buf
);
4220 myresume (cs
.own_buf
, 0, signal
);
4223 require_running_or_break (cs
.own_buf
);
4225 myresume (cs
.own_buf
, 1, signal
);
4227 case 'Z': /* insert_ ... */
4229 case 'z': /* remove_ ... */
4234 char type
= cs
.own_buf
[1];
4236 const int insert
= ch
== 'Z';
4237 const char *p
= &cs
.own_buf
[3];
4239 p
= unpack_varlen_hex (p
, &addr
);
4240 kind
= strtol (p
+ 1, &dataptr
, 16);
4244 struct gdb_breakpoint
*bp
;
4246 bp
= set_gdb_breakpoint (type
, addr
, kind
, &res
);
4251 /* GDB may have sent us a list of *point parameters to
4252 be evaluated on the target's side. Read such list
4253 here. If we already have a list of parameters, GDB
4254 is telling us to drop that list and use this one
4256 clear_breakpoint_conditions_and_commands (bp
);
4257 const char *options
= dataptr
;
4258 process_point_options (bp
, &options
);
4262 res
= delete_gdb_breakpoint (type
, addr
, kind
);
4265 write_ok (cs
.own_buf
);
4268 cs
.own_buf
[0] = '\0';
4270 write_enn (cs
.own_buf
);
4274 response_needed
= 0;
4275 if (!target_running ())
4276 /* The packet we received doesn't make sense - but we can't
4277 reply to it, either. */
4280 fprintf (stderr
, "Killing all inferiors\n");
4282 for_each_process (kill_inferior_callback
);
4284 /* When using the extended protocol, we wait with no program
4285 running. The traditional protocol will exit instead. */
4286 if (extended_protocol
)
4288 cs
.last_status
.kind
= TARGET_WAITKIND_EXITED
;
4289 cs
.last_status
.value
.sig
= GDB_SIGNAL_KILL
;
4297 require_running_or_break (cs
.own_buf
);
4299 ptid_t thread_id
= read_ptid (&cs
.own_buf
[1], NULL
);
4300 if (find_thread_ptid (thread_id
) == NULL
)
4302 write_enn (cs
.own_buf
);
4306 if (mythread_alive (thread_id
))
4307 write_ok (cs
.own_buf
);
4309 write_enn (cs
.own_buf
);
4313 response_needed
= 0;
4315 /* Restarting the inferior is only supported in the extended
4317 if (extended_protocol
)
4319 if (target_running ())
4320 for_each_process (kill_inferior_callback
);
4322 fprintf (stderr
, "GDBserver restarting\n");
4324 /* Wait till we are at 1st instruction in prog. */
4325 if (program_path
.get () != NULL
)
4327 create_inferior (program_path
.get (), program_args
);
4329 if (cs
.last_status
.kind
== TARGET_WAITKIND_STOPPED
)
4331 /* Stopped at the first instruction of the target
4333 cs
.general_thread
= cs
.last_ptid
;
4337 /* Something went wrong. */
4338 cs
.general_thread
= null_ptid
;
4343 cs
.last_status
.kind
= TARGET_WAITKIND_EXITED
;
4344 cs
.last_status
.value
.sig
= GDB_SIGNAL_KILL
;
4350 /* It is a request we don't understand. Respond with an
4351 empty packet so that gdb knows that we don't support this
4353 cs
.own_buf
[0] = '\0';
4357 /* Extended (long) request. */
4358 handle_v_requests (cs
.own_buf
, packet_len
, &new_packet_len
);
4362 /* It is a request we don't understand. Respond with an empty
4363 packet so that gdb knows that we don't support this
4365 cs
.own_buf
[0] = '\0';
4369 if (new_packet_len
!= -1)
4370 putpkt_binary (cs
.own_buf
, new_packet_len
);
4372 putpkt (cs
.own_buf
);
4374 response_needed
= 0;
4382 /* Event-loop callback for serial events. */
4385 handle_serial_event (int err
, gdb_client_data client_data
)
4388 debug_printf ("handling possible serial event\n");
4390 /* Really handle it. */
4391 if (process_serial_event () < 0)
4394 /* Be sure to not change the selected thread behind GDB's back.
4395 Important in the non-stop mode asynchronous protocol. */
4396 set_desired_thread ();
4401 /* Push a stop notification on the notification queue. */
4404 push_stop_notification (ptid_t ptid
, struct target_waitstatus
*status
)
4406 struct vstop_notif
*vstop_notif
= XNEW (struct vstop_notif
);
4408 vstop_notif
->status
= *status
;
4409 vstop_notif
->ptid
= ptid
;
4410 /* Push Stop notification. */
4411 notif_push (¬if_stop
, (struct notif_event
*) vstop_notif
);
4414 /* Event-loop callback for target events. */
4417 handle_target_event (int err
, gdb_client_data client_data
)
4419 client_state
&cs
= get_client_state ();
4421 debug_printf ("handling possible target event\n");
4423 cs
.last_ptid
= mywait (minus_one_ptid
, &cs
.last_status
,
4426 if (cs
.last_status
.kind
== TARGET_WAITKIND_NO_RESUMED
)
4428 if (gdb_connected () && report_no_resumed
)
4429 push_stop_notification (null_ptid
, &cs
.last_status
);
4431 else if (cs
.last_status
.kind
!= TARGET_WAITKIND_IGNORE
)
4433 int pid
= cs
.last_ptid
.pid ();
4434 struct process_info
*process
= find_process_pid (pid
);
4435 int forward_event
= !gdb_connected () || process
->gdb_detached
;
4437 if (cs
.last_status
.kind
== TARGET_WAITKIND_EXITED
4438 || cs
.last_status
.kind
== TARGET_WAITKIND_SIGNALLED
)
4440 mark_breakpoints_out (process
);
4441 target_mourn_inferior (cs
.last_ptid
);
4443 else if (cs
.last_status
.kind
== TARGET_WAITKIND_THREAD_EXITED
)
4447 /* We're reporting this thread as stopped. Update its
4448 "want-stopped" state to what the client wants, until it
4449 gets a new resume action. */
4450 current_thread
->last_resume_kind
= resume_stop
;
4451 current_thread
->last_status
= cs
.last_status
;
4456 if (!target_running ())
4458 /* The last process exited. We're done. */
4462 if (cs
.last_status
.kind
== TARGET_WAITKIND_EXITED
4463 || cs
.last_status
.kind
== TARGET_WAITKIND_SIGNALLED
4464 || cs
.last_status
.kind
== TARGET_WAITKIND_THREAD_EXITED
)
4468 /* A thread stopped with a signal, but gdb isn't
4469 connected to handle it. Pass it down to the
4470 inferior, as if it wasn't being traced. */
4471 enum gdb_signal signal
;
4474 debug_printf ("GDB not connected; forwarding event %d for"
4476 (int) cs
.last_status
.kind
,
4477 target_pid_to_str (cs
.last_ptid
));
4479 if (cs
.last_status
.kind
== TARGET_WAITKIND_STOPPED
)
4480 signal
= cs
.last_status
.value
.sig
;
4482 signal
= GDB_SIGNAL_0
;
4483 target_continue (cs
.last_ptid
, signal
);
4487 push_stop_notification (cs
.last_ptid
, &cs
.last_status
);
4490 /* Be sure to not change the selected thread behind GDB's back.
4491 Important in the non-stop mode asynchronous protocol. */
4492 set_desired_thread ();
4505 } // namespace selftests
4506 #endif /* GDB_SELF_TEST */