sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 1 | /* Main code for remote server for GDB. |
| 2 | Copyright (C) 1989, 1993, 1994, 1995, 1997, 1998, 1999, 2000, 2002, 2003, |
| 3 | 2004, 2005, 2006, 2011 |
| 4 | Free Software Foundation, Inc. |
| 5 | |
| 6 | This file is part of GDB. |
| 7 | It has been modified to integrate it in valgrind |
| 8 | |
| 9 | This program is free software; you can redistribute it and/or modify |
| 10 | it under the terms of the GNU General Public License as published by |
| 11 | the Free Software Foundation; either version 2 of the License, or |
| 12 | (at your option) any later version. |
| 13 | |
| 14 | This program is distributed in the hope that it will be useful, |
| 15 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 17 | GNU General Public License for more details. |
| 18 | |
| 19 | You should have received a copy of the GNU General Public License |
| 20 | along with this program; if not, write to the Free Software |
| 21 | Foundation, Inc., 51 Franklin Street, Fifth Floor, |
| 22 | Boston, MA 02110-1301, USA. */ |
| 23 | |
| 24 | #include "server.h" |
| 25 | #include "regdef.h" |
| 26 | #include "pub_core_options.h" |
| 27 | #include "pub_core_translate.h" |
| 28 | #include "pub_core_mallocfree.h" |
sewardj | 2a31239 | 2011-06-26 09:26:48 +0000 | [diff] [blame] | 29 | #include "pub_core_initimg.h" |
florian | dbb3584 | 2012-10-27 18:39:11 +0000 | [diff] [blame] | 30 | #include "pub_core_syswrap.h" // VG_(show_open_fds) |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 31 | |
| 32 | unsigned long cont_thread; |
| 33 | unsigned long general_thread; |
| 34 | unsigned long step_thread; |
| 35 | unsigned long thread_from_wait; |
| 36 | unsigned long old_thread_from_wait; |
| 37 | |
philippe | 886fde3 | 2012-03-29 21:56:47 +0000 | [diff] [blame] | 38 | int pass_signals[TARGET_SIGNAL_LAST]; /* indexed by gdb signal nr */ |
bart | 2dafc54 | 2011-05-18 16:08:28 +0000 | [diff] [blame] | 39 | |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 40 | /* for a gdbserver integrated in valgrind, resuming the process consists |
| 41 | in returning the control to valgrind. |
philippe | 349a391 | 2012-05-23 21:50:36 +0000 | [diff] [blame] | 42 | The guess process resumes its execution. |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 43 | Then at the next error or break or ..., valgrind calls gdbserver again. |
philippe | 349a391 | 2012-05-23 21:50:36 +0000 | [diff] [blame] | 44 | A resume reply packet must then be built to inform GDB that the |
| 45 | resume request is finished. |
| 46 | resume_reply_packet_needed records the fact that the next call to gdbserver |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 47 | must send a resume packet to gdb. */ |
philippe | 349a391 | 2012-05-23 21:50:36 +0000 | [diff] [blame] | 48 | static Bool resume_reply_packet_needed = False; |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 49 | |
| 50 | VG_MINIMAL_JMP_BUF(toplevel); |
| 51 | |
| 52 | /* Decode a qXfer read request. Return 0 if everything looks OK, |
| 53 | or -1 otherwise. */ |
| 54 | |
| 55 | static |
| 56 | int decode_xfer_read (char *buf, char **annex, CORE_ADDR *ofs, unsigned int *len) |
| 57 | { |
| 58 | /* Extract and NUL-terminate the annex. */ |
| 59 | *annex = buf; |
| 60 | while (*buf && *buf != ':') |
| 61 | buf++; |
| 62 | if (*buf == '\0') |
| 63 | return -1; |
| 64 | *buf++ = 0; |
| 65 | |
| 66 | /* After the read/write marker and annex, qXfer looks like a |
| 67 | traditional 'm' packet. */ |
| 68 | decode_m_packet (buf, ofs, len); |
| 69 | |
| 70 | return 0; |
| 71 | } |
| 72 | |
| 73 | /* Write the response to a successful qXfer read. Returns the |
| 74 | length of the (binary) data stored in BUF, corresponding |
| 75 | to as much of DATA/LEN as we could fit. IS_MORE controls |
| 76 | the first character of the response. */ |
| 77 | static |
| 78 | int write_qxfer_response (char *buf, unsigned char *data, int len, int is_more) |
| 79 | { |
| 80 | int out_len; |
| 81 | |
| 82 | if (is_more) |
| 83 | buf[0] = 'm'; |
| 84 | else |
| 85 | buf[0] = 'l'; |
| 86 | |
| 87 | return remote_escape_output (data, len, (unsigned char *) buf + 1, &out_len, |
| 88 | PBUFSIZ - POVERHSIZ - 1) + 1; |
| 89 | } |
| 90 | |
| 91 | static Bool initial_valgrind_sink_saved = False; |
| 92 | /* True <=> valgrind log sink saved in initial_valgrind_sink */ |
| 93 | static OutputSink initial_valgrind_sink; |
| 94 | |
| 95 | static Bool command_output_to_log = False; |
| 96 | /* True <=> command output goes to log instead of gdb */ |
| 97 | |
| 98 | void reset_valgrind_sink(char *info) |
| 99 | { |
| 100 | if (VG_(log_output_sink).fd != initial_valgrind_sink.fd |
| 101 | && initial_valgrind_sink_saved) { |
| 102 | VG_(log_output_sink).fd = initial_valgrind_sink.fd; |
| 103 | VG_(umsg) ("Reset valgrind output to log (%s)\n", |
| 104 | (info = NULL ? "" : info)); |
| 105 | } |
| 106 | } |
| 107 | |
| 108 | static |
| 109 | void kill_request (char *msg) |
| 110 | { |
| 111 | VG_(umsg) ("%s", msg); |
| 112 | remote_close(); |
| 113 | VG_(exit) (0); |
| 114 | } |
| 115 | |
| 116 | /* handle_gdb_valgrind_command handles the provided mon string command. |
| 117 | If command is recognised, return 1 else return 0. |
| 118 | Note that in case of ambiguous command, 1 is returned. |
| 119 | |
| 120 | *sink_wanted_at_return is modified if one of the commands |
sewardj | 30b3eca | 2011-06-28 08:20:39 +0000 | [diff] [blame] | 121 | 'v.set *_output' is handled. |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 122 | */ |
| 123 | static |
| 124 | int handle_gdb_valgrind_command (char* mon, OutputSink* sink_wanted_at_return) |
| 125 | { |
| 126 | UWord ret = 0; |
| 127 | char s[strlen(mon)+1]; /* copy for strtok_r */ |
| 128 | char* wcmd; |
florian | 19f91bb | 2012-11-10 22:29:54 +0000 | [diff] [blame] | 129 | HChar* ssaveptr; |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 130 | char* endptr; |
| 131 | int kwdid; |
| 132 | int int_value; |
| 133 | |
| 134 | vg_assert (initial_valgrind_sink_saved); |
| 135 | |
| 136 | strcpy (s, mon); |
| 137 | wcmd = strtok_r (s, " ", &ssaveptr); |
| 138 | /* NB: if possible, avoid introducing a new command below which |
sewardj | 30b3eca | 2011-06-28 08:20:39 +0000 | [diff] [blame] | 139 | starts with the same 3 first letters as an already existing |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 140 | command. This ensures a shorter abbreviation for the user. */ |
sewardj | 30b3eca | 2011-06-28 08:20:39 +0000 | [diff] [blame] | 141 | switch (VG_(keyword_id) ("help v.set v.info v.wait v.kill v.translate", |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 142 | wcmd, kwd_report_duplicated_matches)) { |
| 143 | case -2: |
| 144 | ret = 1; |
| 145 | break; |
| 146 | case -1: |
| 147 | break; |
| 148 | case 0: /* help */ |
| 149 | ret = 1; |
| 150 | wcmd = strtok_r (NULL, " ", &ssaveptr); |
| 151 | if (wcmd == NULL) { |
| 152 | int_value = 0; |
| 153 | } else { |
| 154 | switch (VG_(keyword_id) ("debug", wcmd, kwd_report_all)) { |
| 155 | case -2: int_value = 0; break; |
| 156 | case -1: int_value = 0; break; |
| 157 | case 0: int_value = 1; break; |
| 158 | default: tl_assert (0); |
| 159 | } |
| 160 | } |
| 161 | |
| 162 | VG_(gdb_printf) ( |
| 163 | "general valgrind monitor commands:\n" |
philippe | c336038 | 2012-10-21 14:37:14 +0000 | [diff] [blame] | 164 | " help [debug] : monitor command help. With debug: + debugging commands\n" |
sewardj | 30b3eca | 2011-06-28 08:20:39 +0000 | [diff] [blame] | 165 | " v.wait [<ms>] : sleep <ms> (default 0) then continue\n" |
| 166 | " v.info all_errors : show all errors found so far\n" |
| 167 | " v.info last_error : show last error found\n" |
| 168 | " v.info n_errs_found : show the nr of errors found so far\n" |
philippe | c336038 | 2012-10-21 14:37:14 +0000 | [diff] [blame] | 169 | " v.info open_fds : show open file descriptors (only if --track-fds=yes)\n" |
sewardj | 30b3eca | 2011-06-28 08:20:39 +0000 | [diff] [blame] | 170 | " v.kill : kill the Valgrind process\n" |
| 171 | " v.set gdb_output : set valgrind output to gdb\n" |
| 172 | " v.set log_output : set valgrind output to log\n" |
| 173 | " v.set mixed_output : set valgrind output to log, interactive output to gdb\n" |
| 174 | " v.set vgdb-error <errornr> : debug me at error >= <errornr> \n"); |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 175 | if (int_value) { VG_(gdb_printf) ( |
| 176 | "debugging valgrind internals monitor commands:\n" |
sewardj | 30b3eca | 2011-06-28 08:20:39 +0000 | [diff] [blame] | 177 | " v.info gdbserver_status : show gdbserver status\n" |
philippe | 93a6a8d | 2012-04-27 22:59:43 +0000 | [diff] [blame] | 178 | " v.info memory [aspacemgr] : show valgrind heap memory stats\n" |
| 179 | " (with aspacemgr arg, also shows valgrind segments on log ouput)\n" |
sewardj | d6e13d8 | 2011-10-22 20:23:30 +0000 | [diff] [blame] | 180 | " v.info scheduler : show valgrind thread state and stacktrace\n" |
sewardj | 30b3eca | 2011-06-28 08:20:39 +0000 | [diff] [blame] | 181 | " v.set debuglog <level> : set valgrind debug log level to <level>\n" |
| 182 | " v.translate <addr> [<traceflags>] : debug translation of <addr> with <traceflags>\n" |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 183 | " (default traceflags 0b00100000 : show after instrumentation)\n" |
| 184 | " An additional flag 0b100000000 allows to show gdbserver instrumentation\n"); |
| 185 | } |
| 186 | break; |
sewardj | 30b3eca | 2011-06-28 08:20:39 +0000 | [diff] [blame] | 187 | case 1: /* v.set */ |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 188 | ret = 1; |
| 189 | wcmd = strtok_r (NULL, " ", &ssaveptr); |
| 190 | switch (kwdid = VG_(keyword_id) |
| 191 | ("vgdb-error debuglog gdb_output log_output mixed_output", |
| 192 | wcmd, kwd_report_all)) { |
| 193 | case -2: |
| 194 | case -1: |
| 195 | break; |
| 196 | case 0: /* vgdb-error */ |
| 197 | case 1: /* debuglog */ |
| 198 | wcmd = strtok_r (NULL, " ", &ssaveptr); |
| 199 | if (wcmd == NULL) { |
| 200 | int_value = 0; |
| 201 | endptr = "empty"; /* to report an error below */ |
| 202 | } else { |
| 203 | int_value = strtol (wcmd, &endptr, 10); |
| 204 | } |
| 205 | if (*endptr != '\0') { |
| 206 | VG_(gdb_printf) ("missing or malformed integer value\n"); |
| 207 | } else if (kwdid == 0) { |
| 208 | VG_(gdb_printf) ("vgdb-error value changed from %d to %d\n", |
| 209 | VG_(dyn_vgdb_error), int_value); |
| 210 | VG_(dyn_vgdb_error) = int_value; |
| 211 | } else if (kwdid == 1) { |
| 212 | VG_(gdb_printf) ("debuglog value changed from %d to %d\n", |
| 213 | VG_(debugLog_getLevel)(), int_value); |
| 214 | VG_(debugLog_startup) (int_value, "gdbsrv"); |
| 215 | } else { |
| 216 | vg_assert (0); |
| 217 | } |
| 218 | break; |
| 219 | case 2: /* gdb_output */ |
| 220 | (*sink_wanted_at_return).fd = -2; |
| 221 | command_output_to_log = False; |
| 222 | VG_(gdb_printf) ("valgrind output will go to gdb\n"); |
| 223 | break; |
| 224 | case 3: /* log_output */ |
| 225 | (*sink_wanted_at_return).fd = initial_valgrind_sink.fd; |
| 226 | command_output_to_log = True; |
| 227 | VG_(gdb_printf) ("valgrind output will go to log\n"); |
| 228 | break; |
| 229 | case 4: /* mixed output */ |
| 230 | (*sink_wanted_at_return).fd = initial_valgrind_sink.fd; |
| 231 | command_output_to_log = False; |
| 232 | VG_(gdb_printf) |
| 233 | ("valgrind output will go to log, interactive output will go to gdb\n"); |
| 234 | break; |
| 235 | default: |
| 236 | vg_assert (0); |
| 237 | } |
| 238 | break; |
sewardj | 30b3eca | 2011-06-28 08:20:39 +0000 | [diff] [blame] | 239 | case 2: /* v.info */ { |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 240 | ret = 1; |
| 241 | wcmd = strtok_r (NULL, " ", &ssaveptr); |
| 242 | switch (kwdid = VG_(keyword_id) |
sewardj | d6e13d8 | 2011-10-22 20:23:30 +0000 | [diff] [blame] | 243 | ("all_errors n_errs_found last_error gdbserver_status memory" |
philippe | c336038 | 2012-10-21 14:37:14 +0000 | [diff] [blame] | 244 | " scheduler open_fds", |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 245 | wcmd, kwd_report_all)) { |
| 246 | case -2: |
| 247 | case -1: |
| 248 | break; |
| 249 | case 0: // all_errors |
| 250 | // A verbosity of minimum 2 is needed to show the errors. |
| 251 | VG_(show_all_errors)(/* verbosity */ 2, /* xml */ False); |
| 252 | break; |
| 253 | case 1: // n_errs_found |
philippe | baf6964 | 2012-02-15 22:29:30 +0000 | [diff] [blame] | 254 | VG_(gdb_printf) ("n_errs_found %d n_errs_shown %d (vgdb-error %d)\n", |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 255 | VG_(get_n_errs_found) (), |
philippe | baf6964 | 2012-02-15 22:29:30 +0000 | [diff] [blame] | 256 | VG_(get_n_errs_shown) (), |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 257 | VG_(dyn_vgdb_error)); |
| 258 | break; |
| 259 | case 2: // last_error |
| 260 | VG_(show_last_error)(); |
| 261 | break; |
| 262 | case 3: // gdbserver_status |
| 263 | VG_(gdbserver_status_output)(); |
| 264 | break; |
| 265 | case 4: /* memory */ |
| 266 | VG_(print_all_arena_stats) (); |
| 267 | if (VG_(clo_profile_heap)) |
| 268 | VG_(print_arena_cc_analysis) (); |
philippe | 93a6a8d | 2012-04-27 22:59:43 +0000 | [diff] [blame] | 269 | wcmd = strtok_r (NULL, " ", &ssaveptr); |
| 270 | if (wcmd != NULL) { |
| 271 | switch (VG_(keyword_id) ("aspacemgr", wcmd, kwd_report_all)) { |
| 272 | case -2: |
| 273 | case -1: break; |
| 274 | case 0: |
| 275 | VG_(am_show_nsegments) (0, "gdbserver v.info memory aspacemgr"); |
| 276 | break; |
| 277 | default: tl_assert (0); |
| 278 | } |
| 279 | } |
| 280 | |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 281 | ret = 1; |
| 282 | break; |
sewardj | d6e13d8 | 2011-10-22 20:23:30 +0000 | [diff] [blame] | 283 | case 5: /* scheduler */ |
| 284 | VG_(show_sched_status) (); |
| 285 | ret = 1; |
| 286 | break; |
philippe | c336038 | 2012-10-21 14:37:14 +0000 | [diff] [blame] | 287 | case 6: /* open_fds */ |
| 288 | if (VG_(clo_track_fds)) |
| 289 | VG_(show_open_fds) (""); |
| 290 | else |
| 291 | VG_(gdb_printf) |
| 292 | ("Valgrind must be started with --track-fds=yes" |
| 293 | " to show open fds\n"); |
| 294 | ret = 1; |
| 295 | break; |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 296 | default: |
| 297 | vg_assert(0); |
| 298 | } |
| 299 | break; |
| 300 | } |
sewardj | 30b3eca | 2011-06-28 08:20:39 +0000 | [diff] [blame] | 301 | case 3: /* v.wait */ |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 302 | wcmd = strtok_r (NULL, " ", &ssaveptr); |
| 303 | if (wcmd != NULL) { |
| 304 | int_value = strtol (wcmd, &endptr, 10); |
| 305 | VG_(gdb_printf) ("gdbserver: continuing in %d ms ...\n", int_value); |
| 306 | VG_(poll)(NULL, 0, int_value); |
| 307 | } |
| 308 | VG_(gdb_printf) ("gdbserver: continuing after wait ...\n"); |
| 309 | ret = 1; |
| 310 | break; |
sewardj | 30b3eca | 2011-06-28 08:20:39 +0000 | [diff] [blame] | 311 | case 4: /* v.kill */ |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 312 | kill_request ("monitor command request to kill this process\n"); |
| 313 | break; |
sewardj | 30b3eca | 2011-06-28 08:20:39 +0000 | [diff] [blame] | 314 | case 5: { /* v.translate */ |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 315 | Addr address; |
| 316 | SizeT verbosity = 0x20; |
| 317 | |
| 318 | ret = 1; |
| 319 | |
| 320 | VG_(strtok_get_address_and_size) (&address, &verbosity, &ssaveptr); |
| 321 | if (address != (Addr) 0 || verbosity != 0) { |
| 322 | /* we need to force the output to log for the translation trace, |
| 323 | as low level VEX tracing cannot be redirected to gdb. */ |
| 324 | int saved_command_output_to_log = command_output_to_log; |
| 325 | int saved_fd = VG_(log_output_sink).fd; |
| 326 | Bool single_stepping_on_entry = valgrind_single_stepping(); |
| 327 | int vex_verbosity = verbosity & 0xff; |
| 328 | VG_(log_output_sink).fd = initial_valgrind_sink.fd; |
| 329 | if ((verbosity & 0x100) && !single_stepping_on_entry) { |
| 330 | valgrind_set_single_stepping(True); |
| 331 | // to force gdbserver instrumentation. |
| 332 | } |
sewardj | 99d6134 | 2011-05-17 16:35:11 +0000 | [diff] [blame] | 333 | # if defined(VGA_arm) |
| 334 | // on arm, we need to (potentially) convert this address |
| 335 | // to the thumb form. |
| 336 | address = thumb_pc (address); |
| 337 | # endif |
| 338 | |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 339 | VG_(translate) ( 0 /* dummy ThreadId; irrelevant due to debugging*/, |
| 340 | address, |
| 341 | /*debugging*/True, |
| 342 | (Int) vex_verbosity, |
| 343 | /*bbs_done*/0, |
| 344 | /*allow redir?*/True); |
| 345 | if ((verbosity & 0x100) && !single_stepping_on_entry) { |
| 346 | valgrind_set_single_stepping(False); |
| 347 | // reset single stepping. |
| 348 | } |
| 349 | command_output_to_log = saved_command_output_to_log; |
| 350 | VG_(log_output_sink).fd = saved_fd; |
| 351 | } |
| 352 | break; |
| 353 | } |
| 354 | |
| 355 | default: |
| 356 | vg_assert (0); |
| 357 | } |
| 358 | return ret; |
| 359 | } |
| 360 | |
| 361 | /* handle_gdb_monitor_command handles the provided mon string command, |
| 362 | which can be either a "standard" valgrind monitor command |
| 363 | or a tool specific monitor command. |
| 364 | If command recognised, return 1 else return 0. |
| 365 | Note that in case of ambiguous command, 1 is returned. |
| 366 | */ |
| 367 | static |
| 368 | int handle_gdb_monitor_command (char* mon) |
| 369 | { |
| 370 | UWord ret = 0; |
| 371 | UWord tool_ret = 0; |
| 372 | // initially, we assume that when returning, the desired sink is the |
| 373 | // one we have when entering. It can however be changed by the standard |
| 374 | // valgrind command handling. |
| 375 | OutputSink sink_wanted_at_return = VG_(log_output_sink); |
| 376 | |
| 377 | if (!initial_valgrind_sink_saved) { |
| 378 | /* first time we enter here, we save the valgrind default log sink */ |
| 379 | initial_valgrind_sink = sink_wanted_at_return; |
| 380 | initial_valgrind_sink_saved = True; |
| 381 | } |
| 382 | |
| 383 | if (!command_output_to_log) |
| 384 | VG_(log_output_sink).fd = -2; /* redirect to monitor_output */ |
| 385 | |
| 386 | ret = handle_gdb_valgrind_command (mon, &sink_wanted_at_return); |
| 387 | |
| 388 | /* Even if command was recognised by valgrind core, we call the |
| 389 | tool command handler : this is needed to handle help command |
| 390 | and/or to let the tool do some additional processing of a |
| 391 | valgrind standard command. Note however that if valgrind |
| 392 | recognised the command, we will always return success. */ |
| 393 | if (VG_(needs).client_requests) { |
| 394 | /* If the tool reports an error when handling a monitor command, |
| 395 | we need to avoid calling gdbserver during this command |
| 396 | handling. So, we temporarily set VG_(dyn_vgdb_error) to |
| 397 | a huge value to ensure m_errormgr.c does not call gdbserver. */ |
| 398 | Int save_dyn_vgdb_error = VG_(dyn_vgdb_error); |
| 399 | UWord arg[2]; |
| 400 | VG_(dyn_vgdb_error) = 999999999; |
| 401 | arg[0] = (UWord) VG_USERREQ__GDB_MONITOR_COMMAND; |
| 402 | arg[1] = (UWord) mon; |
| 403 | VG_TDICT_CALL(tool_handle_client_request, VG_(running_tid), arg, |
| 404 | &tool_ret); |
| 405 | VG_(dyn_vgdb_error) = save_dyn_vgdb_error; |
| 406 | } |
| 407 | |
| 408 | /* restore or set the desired output */ |
| 409 | VG_(log_output_sink).fd = sink_wanted_at_return.fd; |
| 410 | if (ret | tool_ret) |
| 411 | return 1; |
| 412 | else |
| 413 | return 0; |
| 414 | } |
| 415 | |
| 416 | |
| 417 | /* Handle all of the extended 'Q' packets. */ |
| 418 | static |
| 419 | void handle_set (char *arg_own_buf, int *new_packet_len_p) |
| 420 | { |
| 421 | if (strcmp ("QStartNoAckMode", arg_own_buf) == 0) { |
| 422 | noack_mode = True; |
| 423 | write_ok (arg_own_buf); |
| 424 | return; |
| 425 | } |
| 426 | |
| 427 | if (strncmp ("QPassSignals:", arg_own_buf, 13) == 0) { |
| 428 | int i; |
| 429 | char *from, *to; |
| 430 | char *end = arg_own_buf + strlen(arg_own_buf); |
| 431 | CORE_ADDR sig; |
| 432 | for (i = 0; i < TARGET_SIGNAL_LAST; i++) |
| 433 | pass_signals[i] = 0; |
| 434 | |
| 435 | from = arg_own_buf + 13; |
| 436 | while (from < end) { |
| 437 | to = strchr(from, ';'); |
| 438 | if (to == NULL) to = end; |
| 439 | decode_address (&sig, from, to - from); |
| 440 | pass_signals[(int)sig] = 1; |
philippe | 886fde3 | 2012-03-29 21:56:47 +0000 | [diff] [blame] | 441 | dlog(1, "pass_signal gdb_nr %d %s\n", |
| 442 | (int)sig, target_signal_to_name(sig)); |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 443 | from = to; |
| 444 | if (*from == ';') from++; |
| 445 | } |
| 446 | write_ok (arg_own_buf); |
| 447 | return; |
| 448 | } |
| 449 | /* Otherwise we didn't know what packet it was. Say we didn't |
| 450 | understand it. */ |
| 451 | arg_own_buf[0] = 0; |
| 452 | } |
| 453 | |
| 454 | /* Handle all of the extended 'q' packets. */ |
| 455 | static |
| 456 | void handle_query (char *arg_own_buf, int *new_packet_len_p) |
| 457 | { |
| 458 | static struct inferior_list_entry *thread_ptr; |
| 459 | |
| 460 | /* qRcmd, monitor command handling. */ |
| 461 | if (strncmp ("qRcmd,", arg_own_buf, 6) == 0) { |
| 462 | char *p = arg_own_buf + 6; |
| 463 | int cmdlen = strlen(p)/2; |
| 464 | char cmd[cmdlen+1]; |
| 465 | |
| 466 | if (unhexify (cmd, p, cmdlen) != cmdlen) { |
| 467 | write_enn (arg_own_buf); |
| 468 | return; |
| 469 | } |
| 470 | cmd[cmdlen] = '\0'; |
| 471 | |
| 472 | if (handle_gdb_monitor_command (cmd)) { |
| 473 | /* In case the command is from a standalone vgdb, |
| 474 | connection will be closed soon => flush the output. */ |
| 475 | VG_(message_flush) (); |
| 476 | write_ok (arg_own_buf); |
| 477 | return; |
| 478 | } else { |
| 479 | /* cmd not recognised */ |
| 480 | VG_(gdb_printf) |
| 481 | ("command '%s' not recognised\n" |
| 482 | "In gdb, try 'monitor help'\n" |
| 483 | "In a shell, try 'vgdb help'\n", |
| 484 | cmd); |
| 485 | write_ok (arg_own_buf); |
| 486 | return; |
| 487 | } |
| 488 | } |
| 489 | |
| 490 | /* provide some valgrind specific info in return to qThreadExtraInfo. */ |
| 491 | if (strncmp ("qThreadExtraInfo,", arg_own_buf, 17) == 0) { |
| 492 | unsigned long gdb_id; |
| 493 | struct thread_info *ti; |
| 494 | ThreadState *tst; |
| 495 | char status[100]; |
| 496 | |
| 497 | gdb_id = strtoul (&arg_own_buf[17], NULL, 16); |
| 498 | ti = gdb_id_to_thread (gdb_id); |
| 499 | if (ti != NULL) { |
| 500 | tst = (ThreadState *) inferior_target_data (ti); |
| 501 | /* Additional info is the tid and the thread status. */ |
| 502 | VG_(snprintf) (status, sizeof(status), "tid %d %s", |
| 503 | tst->tid, |
| 504 | VG_(name_of_ThreadStatus)(tst->status)); |
| 505 | hexify (arg_own_buf, status, strlen(status)); |
| 506 | return; |
| 507 | } else { |
| 508 | write_enn (arg_own_buf); |
| 509 | return; |
| 510 | } |
| 511 | } |
| 512 | |
| 513 | if (strcmp ("qAttached", arg_own_buf) == 0) { |
| 514 | /* tell gdb to always detach, never kill the process */ |
| 515 | arg_own_buf[0] = '1'; |
| 516 | arg_own_buf[1] = 0; |
| 517 | return; |
| 518 | } |
| 519 | |
| 520 | if (strcmp ("qSymbol::", arg_own_buf) == 0) { |
| 521 | /* We have no symbol to read. */ |
| 522 | write_ok (arg_own_buf); |
| 523 | return; |
| 524 | } |
| 525 | |
| 526 | if (strcmp ("qfThreadInfo", arg_own_buf) == 0) { |
| 527 | thread_ptr = all_threads.head; |
| 528 | VG_(sprintf) (arg_own_buf, "m%x", |
| 529 | thread_to_gdb_id ((struct thread_info *)thread_ptr)); |
| 530 | thread_ptr = thread_ptr->next; |
| 531 | return; |
| 532 | } |
| 533 | |
| 534 | if (strcmp ("qsThreadInfo", arg_own_buf) == 0) { |
| 535 | if (thread_ptr != NULL) { |
| 536 | VG_(sprintf) (arg_own_buf, "m%x", |
| 537 | thread_to_gdb_id ((struct thread_info *)thread_ptr)); |
| 538 | thread_ptr = thread_ptr->next; |
| 539 | return; |
| 540 | } else { |
| 541 | VG_(sprintf) (arg_own_buf, "l"); |
| 542 | return; |
| 543 | } |
| 544 | } |
| 545 | |
philippe | 419d5f2 | 2012-05-24 21:33:17 +0000 | [diff] [blame] | 546 | if (valgrind_target_xml(VG_(clo_vgdb_shadow_registers)) != NULL |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 547 | && strncmp ("qXfer:features:read:", arg_own_buf, 20) == 0) { |
| 548 | CORE_ADDR ofs; |
| 549 | unsigned int len, doc_len; |
| 550 | char *annex = NULL; |
| 551 | // First, the annex is extracted from the packet received. |
| 552 | // Then, it is replaced by the corresponding file name. |
| 553 | int fd; |
| 554 | |
| 555 | /* Grab the annex, offset, and length. */ |
| 556 | if (decode_xfer_read (arg_own_buf + 20, &annex, &ofs, &len) < 0) { |
| 557 | strcpy (arg_own_buf, "E00"); |
| 558 | return; |
| 559 | } |
| 560 | |
| 561 | if (strcmp (annex, "target.xml") == 0) { |
philippe | 419d5f2 | 2012-05-24 21:33:17 +0000 | [diff] [blame] | 562 | annex = valgrind_target_xml(VG_(clo_vgdb_shadow_registers)); |
| 563 | if (annex != NULL && VG_(clo_vgdb_shadow_registers)) { |
| 564 | /* Ensure the shadow registers are initialized. */ |
| 565 | initialize_shadow_low(True); |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 566 | } |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 567 | if (annex == NULL) { |
| 568 | strcpy (arg_own_buf, "E00"); |
| 569 | return; |
| 570 | } |
| 571 | } |
| 572 | |
| 573 | { |
philippe | 75a5f78 | 2012-02-24 11:25:58 +0000 | [diff] [blame] | 574 | char doc[VG_(strlen)(VG_(libdir)) + 1 + VG_(strlen)(annex) + 1]; |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 575 | struct vg_stat stat_doc; |
| 576 | char toread[len]; |
| 577 | int len_read; |
| 578 | |
| 579 | VG_(sprintf)(doc, "%s/%s", VG_(libdir), annex); |
| 580 | fd = VG_(fd_open) (doc, VKI_O_RDONLY, 0); |
| 581 | if (fd == -1) { |
| 582 | strcpy (arg_own_buf, "E00"); |
| 583 | return; |
| 584 | } |
| 585 | if (VG_(fstat) (fd, &stat_doc) != 0) { |
| 586 | VG_(close) (fd); |
| 587 | strcpy (arg_own_buf, "E00"); |
| 588 | return; |
| 589 | } |
| 590 | doc_len = stat_doc.size; |
| 591 | |
| 592 | if (len > PBUFSIZ - POVERHSIZ) |
| 593 | len = PBUFSIZ - POVERHSIZ; |
| 594 | |
| 595 | if (ofs > doc_len) { |
| 596 | write_enn (arg_own_buf); |
| 597 | VG_(close) (fd); |
| 598 | return; |
| 599 | } |
| 600 | VG_(lseek) (fd, ofs, VKI_SEEK_SET); |
| 601 | len_read = VG_(read) (fd, toread, len); |
florian | 1636d33 | 2012-11-15 04:27:04 +0000 | [diff] [blame^] | 602 | *new_packet_len_p = write_qxfer_response (arg_own_buf, (unsigned char *)toread, |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 603 | len_read, ofs + len_read < doc_len); |
| 604 | VG_(close) (fd); |
| 605 | return; |
| 606 | } |
| 607 | } |
| 608 | |
sewardj | 2a31239 | 2011-06-26 09:26:48 +0000 | [diff] [blame] | 609 | if (strncmp ("qXfer:auxv:read:", arg_own_buf, 16) == 0) { |
| 610 | unsigned char *data; |
| 611 | int n; |
| 612 | CORE_ADDR ofs; |
| 613 | unsigned int len; |
| 614 | char *annex; |
| 615 | |
| 616 | /* Reject any annex; grab the offset and length. */ |
| 617 | if (decode_xfer_read (arg_own_buf + 16, &annex, &ofs, &len) < 0 |
| 618 | || annex[0] != '\0') { |
| 619 | strcpy (arg_own_buf, "E00"); |
| 620 | return; |
| 621 | } |
| 622 | |
| 623 | if (len > PBUFSIZ - 2) |
| 624 | len = PBUFSIZ - 2; |
| 625 | data = malloc (len); |
| 626 | |
| 627 | { |
| 628 | UWord *client_auxv = VG_(client_auxv); |
| 629 | unsigned int client_auxv_len = 0; |
| 630 | while (*client_auxv != 0) { |
| 631 | dlog(4, "auxv %lld %llx\n", |
| 632 | (ULong)*client_auxv, |
| 633 | (ULong)*(client_auxv+1)); |
| 634 | client_auxv++; |
| 635 | client_auxv++; |
| 636 | client_auxv_len += 2 * sizeof(UWord); |
| 637 | } |
| 638 | client_auxv_len += 2 * sizeof(UWord); |
| 639 | dlog(4, "auxv len %d\n", client_auxv_len); |
| 640 | |
| 641 | if (ofs >= client_auxv_len) |
| 642 | n = -1; |
| 643 | else { |
| 644 | n = client_auxv_len - ofs; |
| 645 | VG_(memcpy) (data, (unsigned char *) VG_(client_auxv), n); |
| 646 | } |
| 647 | } |
| 648 | |
| 649 | if (n < 0) |
| 650 | write_enn (arg_own_buf); |
| 651 | else if (n > len) |
| 652 | *new_packet_len_p = write_qxfer_response (arg_own_buf, data, len, 1); |
| 653 | else |
| 654 | *new_packet_len_p = write_qxfer_response (arg_own_buf, data, n, 0); |
| 655 | |
| 656 | free (data); |
| 657 | |
| 658 | return; |
| 659 | } |
| 660 | |
| 661 | |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 662 | /* Protocol features query. */ |
| 663 | if (strncmp ("qSupported", arg_own_buf, 10) == 0 |
| 664 | && (arg_own_buf[10] == ':' || arg_own_buf[10] == '\0')) { |
| 665 | VG_(sprintf) (arg_own_buf, "PacketSize=%x", PBUFSIZ - 1); |
| 666 | /* Note: max packet size including frame and checksum, but without |
| 667 | trailing null byte, which is not sent/received. */ |
| 668 | |
| 669 | strcat (arg_own_buf, ";QStartNoAckMode+"); |
| 670 | strcat (arg_own_buf, ";QPassSignals+"); |
sewardj | 2a31239 | 2011-06-26 09:26:48 +0000 | [diff] [blame] | 671 | if (VG_(client_auxv)) |
| 672 | strcat (arg_own_buf, ";qXfer:auxv:read+"); |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 673 | |
philippe | 419d5f2 | 2012-05-24 21:33:17 +0000 | [diff] [blame] | 674 | if (valgrind_target_xml(VG_(clo_vgdb_shadow_registers)) != NULL) { |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 675 | strcat (arg_own_buf, ";qXfer:features:read+"); |
| 676 | /* if a new gdb connects to us, we have to reset the register |
| 677 | set to the normal register sets to allow this new gdb to |
| 678 | decide to use or not the shadow registers. |
| 679 | |
| 680 | Note that the reset is only done for gdb that are sending |
| 681 | qSupported packets. If a user first connected with a recent |
| 682 | gdb using shadow registers and then with a very old gdb |
| 683 | that does not use qSupported packet, then the old gdb will |
| 684 | not properly connect. */ |
| 685 | initialize_shadow_low(False); |
| 686 | } |
| 687 | return; |
| 688 | } |
| 689 | |
| 690 | /* Otherwise we didn't know what packet it was. Say we didn't |
| 691 | understand it. */ |
| 692 | arg_own_buf[0] = 0; |
| 693 | } |
| 694 | |
| 695 | /* Handle all of the extended 'v' packets. */ |
| 696 | static |
sewardj | 0bb3c67 | 2011-07-26 23:29:25 +0000 | [diff] [blame] | 697 | void handle_v_requests (char *arg_own_buf, char *status, int *zignal) |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 698 | { |
| 699 | /* vcont packet code from gdb 6.6 removed */ |
| 700 | |
| 701 | /* Otherwise we didn't know what packet it was. Say we didn't |
| 702 | understand it. */ |
| 703 | arg_own_buf[0] = 0; |
| 704 | return; |
| 705 | } |
| 706 | |
| 707 | static |
| 708 | void myresume (int step, int sig) |
| 709 | { |
| 710 | struct thread_resume resume_info[2]; |
| 711 | int n = 0; |
| 712 | |
philippe | 349a391 | 2012-05-23 21:50:36 +0000 | [diff] [blame] | 713 | if (step || sig) { |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 714 | resume_info[0].step = step; |
| 715 | resume_info[0].sig = sig; |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 716 | n++; |
| 717 | } |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 718 | resume_info[n].step = 0; |
| 719 | resume_info[n].sig = 0; |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 720 | |
philippe | 349a391 | 2012-05-23 21:50:36 +0000 | [diff] [blame] | 721 | resume_reply_packet_needed = True; |
| 722 | valgrind_resume (resume_info); |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 723 | } |
| 724 | |
| 725 | /* server_main global variables */ |
| 726 | static char *own_buf; |
| 727 | static unsigned char *mem_buf; |
| 728 | |
| 729 | void gdbserver_init (void) |
| 730 | { |
| 731 | dlog(1, "gdbserver_init gdbserver embedded in valgrind: %s\n", version); |
| 732 | noack_mode = False; |
philippe | 349a391 | 2012-05-23 21:50:36 +0000 | [diff] [blame] | 733 | valgrind_initialize_target (); |
philippe | 0e1cac9 | 2012-02-28 22:37:44 +0000 | [diff] [blame] | 734 | // After a fork, gdbserver_init can be called again. |
| 735 | // We do not have to re-malloc the buffers in such a case. |
| 736 | if (own_buf == NULL) |
| 737 | own_buf = malloc (PBUFSIZ); |
| 738 | if (mem_buf == NULL) |
| 739 | mem_buf = malloc (PBUFSIZ); |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 740 | } |
| 741 | |
| 742 | void gdbserver_terminate (void) |
| 743 | { |
| 744 | /* last call to gdbserver is cleanup call */ |
| 745 | if (VG_MINIMAL_SETJMP(toplevel)) { |
| 746 | dlog(0, "error caused VG_MINIMAL_LONGJMP to gdbserver_terminate\n"); |
| 747 | return; |
| 748 | } |
| 749 | remote_close(); |
| 750 | } |
| 751 | |
| 752 | void server_main (void) |
| 753 | { |
| 754 | static char status; |
sewardj | 0bb3c67 | 2011-07-26 23:29:25 +0000 | [diff] [blame] | 755 | static int zignal; |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 756 | |
| 757 | char ch; |
| 758 | int i = 0; |
| 759 | unsigned int len; |
| 760 | CORE_ADDR mem_addr; |
| 761 | |
philippe | 349a391 | 2012-05-23 21:50:36 +0000 | [diff] [blame] | 762 | zignal = valgrind_wait (&status); |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 763 | if (VG_MINIMAL_SETJMP(toplevel)) { |
| 764 | dlog(0, "error caused VG_MINIMAL_LONGJMP to server_main\n"); |
| 765 | } |
| 766 | while (1) { |
| 767 | unsigned char sig; |
| 768 | int packet_len; |
| 769 | int new_packet_len = -1; |
| 770 | |
philippe | 349a391 | 2012-05-23 21:50:36 +0000 | [diff] [blame] | 771 | if (resume_reply_packet_needed) { |
| 772 | /* Send the resume reply to reply to last GDB resume |
| 773 | request. */ |
| 774 | resume_reply_packet_needed = False; |
sewardj | 0bb3c67 | 2011-07-26 23:29:25 +0000 | [diff] [blame] | 775 | prepare_resume_reply (own_buf, status, zignal); |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 776 | putpkt (own_buf); |
| 777 | } |
| 778 | |
philippe | 0447bbd | 2012-10-17 21:32:03 +0000 | [diff] [blame] | 779 | /* If we our status is terminal (exit or fatal signal) get out |
| 780 | as quickly as we can. We won't be able to handle any request |
| 781 | anymore. */ |
| 782 | if (status == 'W' || status == 'X') { |
| 783 | return; |
| 784 | } |
| 785 | |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 786 | packet_len = getpkt (own_buf); |
| 787 | if (packet_len <= 0) |
| 788 | break; |
| 789 | |
| 790 | i = 0; |
| 791 | ch = own_buf[i++]; |
| 792 | switch (ch) { |
| 793 | case 'Q': |
| 794 | handle_set (own_buf, &new_packet_len); |
| 795 | break; |
| 796 | case 'q': |
| 797 | handle_query (own_buf, &new_packet_len); |
| 798 | break; |
| 799 | case 'd': |
| 800 | /* set/unset debugging is done through valgrind debug level. */ |
| 801 | own_buf[0] = '\0'; |
| 802 | break; |
| 803 | case 'D': |
| 804 | reset_valgrind_sink("gdb detaching from process"); |
| 805 | |
| 806 | /* When detaching or kill the process, gdb expects to get |
| 807 | an packet OK back. Any other output will make gdb |
| 808 | believes detach did not work. */ |
| 809 | write_ok (own_buf); |
| 810 | putpkt (own_buf); |
| 811 | remote_finish (reset_after_error); |
| 812 | remote_open (VG_(clo_vgdb_prefix)); |
| 813 | myresume (0, 0); |
philippe | 349a391 | 2012-05-23 21:50:36 +0000 | [diff] [blame] | 814 | resume_reply_packet_needed = False; |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 815 | return; |
| 816 | case '!': |
| 817 | /* We can not use the extended protocol with valgrind, |
| 818 | because we can not restart the running |
| 819 | program. So return unrecognized. */ |
| 820 | own_buf[0] = '\0'; |
| 821 | break; |
| 822 | case '?': |
sewardj | 0bb3c67 | 2011-07-26 23:29:25 +0000 | [diff] [blame] | 823 | prepare_resume_reply (own_buf, status, zignal); |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 824 | break; |
| 825 | case 'H': |
| 826 | if (own_buf[1] == 'c' || own_buf[1] == 'g' || own_buf[1] == 's') { |
| 827 | unsigned long gdb_id, thread_id; |
| 828 | |
| 829 | gdb_id = strtoul (&own_buf[2], NULL, 16); |
| 830 | thread_id = gdb_id_to_thread_id (gdb_id); |
| 831 | if (thread_id == 0) { |
| 832 | write_enn (own_buf); |
| 833 | break; |
| 834 | } |
| 835 | |
| 836 | if (own_buf[1] == 'g') { |
| 837 | general_thread = thread_id; |
| 838 | set_desired_inferior (1); |
| 839 | } else if (own_buf[1] == 'c') { |
| 840 | cont_thread = thread_id; |
| 841 | } else if (own_buf[1] == 's') { |
| 842 | step_thread = thread_id; |
| 843 | } |
| 844 | |
| 845 | write_ok (own_buf); |
| 846 | } else { |
| 847 | /* Silently ignore it so that gdb can extend the protocol |
| 848 | without compatibility headaches. */ |
| 849 | own_buf[0] = '\0'; |
| 850 | } |
| 851 | break; |
| 852 | case 'g': |
| 853 | set_desired_inferior (1); |
| 854 | registers_to_string (own_buf); |
| 855 | break; |
| 856 | case 'G': |
| 857 | set_desired_inferior (1); |
| 858 | registers_from_string (&own_buf[1]); |
| 859 | write_ok (own_buf); |
| 860 | break; |
| 861 | case 'P': { |
| 862 | int regno; |
| 863 | char *regbytes; |
| 864 | Bool mod; |
| 865 | ThreadState *tst; |
| 866 | regno = strtol(&own_buf[1], NULL, 16); |
| 867 | regbytes = strchr(&own_buf[0], '=') + 1; |
| 868 | set_desired_inferior (1); |
| 869 | tst = (ThreadState *) inferior_target_data (current_inferior); |
| 870 | /* Only accept changing registers in "runnable state3. |
| 871 | In fact, it would be ok to change most of the registers |
| 872 | except a few "sensitive" registers such as the PC, SP, BP. |
| 873 | We assume we do not need to very specific here, and that we |
| 874 | can just refuse all of these. */ |
| 875 | if (tst->status == VgTs_Runnable || tst->status == VgTs_Yielding) { |
| 876 | supply_register_from_string (regno, regbytes, &mod); |
| 877 | write_ok (own_buf); |
| 878 | } else { |
| 879 | /* at least from gdb 6.6 onwards, an E. error |
| 880 | reply is shown to the user. So, we do an error |
| 881 | msg which both is accepted by gdb as an error msg |
| 882 | and is readable by the user. */ |
| 883 | VG_(sprintf) |
| 884 | (own_buf, |
| 885 | "E.\n" |
| 886 | "ERROR changing register %s regno %d\n" |
| 887 | "gdb commands changing registers (pc, sp, ...) (e.g. 'jump',\n" |
| 888 | "set pc, calling from gdb a function in the debugged process, ...)\n" |
| 889 | "can only be accepted if the thread is VgTs_Runnable or VgTs_Yielding state\n" |
| 890 | "Thread status is %s\n", |
| 891 | find_register_by_number (regno)->name, regno, |
| 892 | VG_(name_of_ThreadStatus)(tst->status)); |
| 893 | if (VG_(clo_verbosity) > 1) |
| 894 | VG_(umsg) ("%s\n", own_buf); |
| 895 | } |
| 896 | break; |
| 897 | } |
| 898 | case 'm': |
| 899 | decode_m_packet (&own_buf[1], &mem_addr, &len); |
philippe | 349a391 | 2012-05-23 21:50:36 +0000 | [diff] [blame] | 900 | if (valgrind_read_memory (mem_addr, mem_buf, len) == 0) |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 901 | convert_int_to_ascii (mem_buf, own_buf, len); |
| 902 | else |
| 903 | write_enn (own_buf); |
| 904 | break; |
| 905 | case 'M': |
| 906 | decode_M_packet (&own_buf[1], &mem_addr, &len, mem_buf); |
philippe | 349a391 | 2012-05-23 21:50:36 +0000 | [diff] [blame] | 907 | if (valgrind_write_memory (mem_addr, mem_buf, len) == 0) |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 908 | write_ok (own_buf); |
| 909 | else |
| 910 | write_enn (own_buf); |
| 911 | break; |
| 912 | case 'X': |
| 913 | if (decode_X_packet (&own_buf[1], packet_len - 1, |
| 914 | &mem_addr, &len, mem_buf) < 0 |
philippe | 349a391 | 2012-05-23 21:50:36 +0000 | [diff] [blame] | 915 | || valgrind_write_memory (mem_addr, mem_buf, len) != 0) |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 916 | write_enn (own_buf); |
| 917 | else |
| 918 | write_ok (own_buf); |
| 919 | break; |
| 920 | case 'C': |
| 921 | convert_ascii_to_int (own_buf + 1, &sig, 1); |
| 922 | if (target_signal_to_host_p (sig)) |
sewardj | 0bb3c67 | 2011-07-26 23:29:25 +0000 | [diff] [blame] | 923 | zignal = target_signal_to_host (sig); |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 924 | else |
sewardj | 0bb3c67 | 2011-07-26 23:29:25 +0000 | [diff] [blame] | 925 | zignal = 0; |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 926 | set_desired_inferior (0); |
sewardj | 0bb3c67 | 2011-07-26 23:29:25 +0000 | [diff] [blame] | 927 | myresume (0, zignal); |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 928 | return; // return control to valgrind |
| 929 | case 'S': |
| 930 | convert_ascii_to_int (own_buf + 1, &sig, 1); |
| 931 | if (target_signal_to_host_p (sig)) |
sewardj | 0bb3c67 | 2011-07-26 23:29:25 +0000 | [diff] [blame] | 932 | zignal = target_signal_to_host (sig); |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 933 | else |
sewardj | 0bb3c67 | 2011-07-26 23:29:25 +0000 | [diff] [blame] | 934 | zignal = 0; |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 935 | set_desired_inferior (0); |
sewardj | 0bb3c67 | 2011-07-26 23:29:25 +0000 | [diff] [blame] | 936 | myresume (1, zignal); |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 937 | return; // return control to valgrind |
| 938 | case 'c': |
| 939 | set_desired_inferior (0); |
| 940 | myresume (0, 0); |
| 941 | return; // return control to valgrind |
| 942 | case 's': |
| 943 | set_desired_inferior (0); |
| 944 | myresume (1, 0); |
| 945 | return; // return control to valgrind |
| 946 | case 'Z': { |
| 947 | char *lenptr; |
| 948 | char *dataptr; |
| 949 | CORE_ADDR addr = strtoul (&own_buf[3], &lenptr, 16); |
| 950 | int zlen = strtol (lenptr + 1, &dataptr, 16); |
| 951 | char type = own_buf[1]; |
| 952 | |
philippe | 349a391 | 2012-05-23 21:50:36 +0000 | [diff] [blame] | 953 | if (type < '0' || type > '4') { |
| 954 | /* Watchpoint command type unrecognized. */ |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 955 | own_buf[0] = '\0'; |
| 956 | } else { |
| 957 | int res; |
| 958 | |
philippe | 349a391 | 2012-05-23 21:50:36 +0000 | [diff] [blame] | 959 | res = valgrind_insert_watchpoint (type, addr, zlen); |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 960 | if (res == 0) |
| 961 | write_ok (own_buf); |
| 962 | else if (res == 1) |
| 963 | /* Unsupported. */ |
| 964 | own_buf[0] = '\0'; |
| 965 | else |
| 966 | write_enn (own_buf); |
| 967 | } |
| 968 | break; |
| 969 | } |
| 970 | case 'z': { |
| 971 | char *lenptr; |
| 972 | char *dataptr; |
| 973 | CORE_ADDR addr = strtoul (&own_buf[3], &lenptr, 16); |
| 974 | int zlen = strtol (lenptr + 1, &dataptr, 16); |
| 975 | char type = own_buf[1]; |
| 976 | |
philippe | 349a391 | 2012-05-23 21:50:36 +0000 | [diff] [blame] | 977 | if (type < '0' || type > '4') { |
| 978 | /* Watchpoint command type unrecognized. */ |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 979 | own_buf[0] = '\0'; |
| 980 | } else { |
| 981 | int res; |
| 982 | |
philippe | 349a391 | 2012-05-23 21:50:36 +0000 | [diff] [blame] | 983 | res = valgrind_remove_watchpoint (type, addr, zlen); |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 984 | if (res == 0) |
| 985 | write_ok (own_buf); |
| 986 | else if (res == 1) |
| 987 | /* Unsupported. */ |
| 988 | own_buf[0] = '\0'; |
| 989 | else |
| 990 | write_enn (own_buf); |
| 991 | } |
| 992 | break; |
| 993 | } |
| 994 | case 'k': |
| 995 | kill_request("Gdb request to kill this process\n"); |
| 996 | break; |
| 997 | case 'T': { |
| 998 | unsigned long gdb_id, thread_id; |
| 999 | |
| 1000 | gdb_id = strtoul (&own_buf[1], NULL, 16); |
| 1001 | thread_id = gdb_id_to_thread_id (gdb_id); |
| 1002 | if (thread_id == 0) { |
| 1003 | write_enn (own_buf); |
| 1004 | break; |
| 1005 | } |
| 1006 | |
philippe | 349a391 | 2012-05-23 21:50:36 +0000 | [diff] [blame] | 1007 | if (valgrind_thread_alive (thread_id)) |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 1008 | write_ok (own_buf); |
| 1009 | else |
| 1010 | write_enn (own_buf); |
| 1011 | break; |
| 1012 | } |
| 1013 | case 'R': |
| 1014 | /* Restarting the inferior is only supported in the |
| 1015 | extended protocol. |
| 1016 | => It is a request we don't understand. Respond with an |
| 1017 | empty packet so that gdb knows that we don't support this |
| 1018 | request. */ |
| 1019 | own_buf[0] = '\0'; |
| 1020 | break; |
| 1021 | case 'v': |
| 1022 | /* Extended (long) request. */ |
sewardj | 0bb3c67 | 2011-07-26 23:29:25 +0000 | [diff] [blame] | 1023 | handle_v_requests (own_buf, &status, &zignal); |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 1024 | break; |
| 1025 | default: |
| 1026 | /* It is a request we don't understand. Respond with an |
| 1027 | empty packet so that gdb knows that we don't support this |
| 1028 | request. */ |
| 1029 | own_buf[0] = '\0'; |
| 1030 | break; |
| 1031 | } |
| 1032 | |
| 1033 | if (new_packet_len != -1) |
| 1034 | putpkt_binary (own_buf, new_packet_len); |
| 1035 | else |
| 1036 | putpkt (own_buf); |
| 1037 | |
| 1038 | if (status == 'W') |
sewardj | 0bb3c67 | 2011-07-26 23:29:25 +0000 | [diff] [blame] | 1039 | VG_(umsg) ("\nChild exited with status %d\n", zignal); |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 1040 | if (status == 'X') |
sewardj | 47ffedb | 2011-10-24 07:36:57 +0000 | [diff] [blame] | 1041 | VG_(umsg) ("\nChild terminated with signal = 0x%x (%s)\n", |
sewardj | 0bb3c67 | 2011-07-26 23:29:25 +0000 | [diff] [blame] | 1042 | target_signal_to_host (zignal), |
| 1043 | target_signal_to_name (zignal)); |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 1044 | if (status == 'W' || status == 'X') { |
| 1045 | VG_(umsg) ("Process exiting\n"); |
| 1046 | VG_(exit) (0); |
| 1047 | } |
| 1048 | } |
| 1049 | |
| 1050 | /* We come here when getpkt fails => close the connection, |
| 1051 | and re-open. Then return control to valgrind. |
| 1052 | We return the control to valgrind as we assume that |
| 1053 | the connection was closed due to vgdb having finished |
| 1054 | to execute a command. */ |
| 1055 | if (VG_(clo_verbosity) > 1) |
| 1056 | VG_(umsg) ("Remote side has terminated connection. " |
| 1057 | "GDBserver will reopen the connection.\n"); |
| 1058 | remote_finish (reset_after_error); |
| 1059 | remote_open (VG_(clo_vgdb_prefix)); |
| 1060 | myresume (0, 0); |
philippe | 349a391 | 2012-05-23 21:50:36 +0000 | [diff] [blame] | 1061 | resume_reply_packet_needed = False; |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 1062 | return; |
| 1063 | } |