| 1 | /* Machine independent support for SVR4 /proc (process file system) for GDB. |
| 2 | |
| 3 | Copyright (C) 1999-2015 Free Software Foundation, Inc. |
| 4 | |
| 5 | Written by Michael Snyder at Cygnus Solutions. |
| 6 | Based on work by Fred Fish, Stu Grossman, Geoff Noer, and others. |
| 7 | |
| 8 | This file is part of GDB. |
| 9 | |
| 10 | This program is free software; you can redistribute it and/or modify |
| 11 | it under the terms of the GNU General Public License as published by |
| 12 | the Free Software Foundation; either version 3 of the License, or |
| 13 | (at your option) any later version. |
| 14 | |
| 15 | This program is distributed in the hope that it will be useful, |
| 16 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 18 | GNU General Public License for more details. |
| 19 | |
| 20 | You should have received a copy of the GNU General Public License |
| 21 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| 22 | |
| 23 | #include "defs.h" |
| 24 | #include "inferior.h" |
| 25 | #include "infrun.h" |
| 26 | #include "target.h" |
| 27 | #include "gdbcore.h" |
| 28 | #include "elf-bfd.h" /* for elfcore_write_* */ |
| 29 | #include "gdbcmd.h" |
| 30 | #include "gdbthread.h" |
| 31 | #include "regcache.h" |
| 32 | #include "inf-child.h" |
| 33 | #include "filestuff.h" |
| 34 | |
| 35 | #if defined (NEW_PROC_API) |
| 36 | #define _STRUCTURED_PROC 1 /* Should be done by configure script. */ |
| 37 | #endif |
| 38 | |
| 39 | #include <sys/procfs.h> |
| 40 | #ifdef HAVE_SYS_FAULT_H |
| 41 | #include <sys/fault.h> |
| 42 | #endif |
| 43 | #ifdef HAVE_SYS_SYSCALL_H |
| 44 | #include <sys/syscall.h> |
| 45 | #endif |
| 46 | #include "gdb_wait.h" |
| 47 | #include <signal.h> |
| 48 | #include <ctype.h> |
| 49 | #include "gdb_bfd.h" |
| 50 | #include "inflow.h" |
| 51 | #include "auxv.h" |
| 52 | #include "procfs.h" |
| 53 | #include "observer.h" |
| 54 | |
| 55 | /* This module provides the interface between GDB and the |
| 56 | /proc file system, which is used on many versions of Unix |
| 57 | as a means for debuggers to control other processes. |
| 58 | |
| 59 | Examples of the systems that use this interface are: |
| 60 | |
| 61 | Irix |
| 62 | Solaris |
| 63 | OSF |
| 64 | AIX5 |
| 65 | |
| 66 | /proc works by imitating a file system: you open a simulated file |
| 67 | that represents the process you wish to interact with, and perform |
| 68 | operations on that "file" in order to examine or change the state |
| 69 | of the other process. |
| 70 | |
| 71 | The most important thing to know about /proc and this module is |
| 72 | that there are two very different interfaces to /proc: |
| 73 | |
| 74 | One that uses the ioctl system call, and another that uses read |
| 75 | and write system calls. |
| 76 | |
| 77 | This module has to support both /proc interfaces. This means that |
| 78 | there are two different ways of doing every basic operation. |
| 79 | |
| 80 | In order to keep most of the code simple and clean, I have defined |
| 81 | an interface "layer" which hides all these system calls. An ifdef |
| 82 | (NEW_PROC_API) determines which interface we are using, and most or |
| 83 | all occurrances of this ifdef should be confined to this interface |
| 84 | layer. */ |
| 85 | |
| 86 | /* Determine which /proc API we are using: The ioctl API defines |
| 87 | PIOCSTATUS, while the read/write (multiple fd) API never does. */ |
| 88 | |
| 89 | #ifdef NEW_PROC_API |
| 90 | #include <sys/types.h> |
| 91 | #include <dirent.h> /* opendir/readdir, for listing the LWP's */ |
| 92 | #endif |
| 93 | |
| 94 | #include <fcntl.h> /* for O_RDONLY */ |
| 95 | #include <unistd.h> /* for "X_OK" */ |
| 96 | #include <sys/stat.h> /* for struct stat */ |
| 97 | |
| 98 | /* Note: procfs-utils.h must be included after the above system header |
| 99 | files, because it redefines various system calls using macros. |
| 100 | This may be incompatible with the prototype declarations. */ |
| 101 | |
| 102 | #include "proc-utils.h" |
| 103 | |
| 104 | /* Prototypes for supply_gregset etc. */ |
| 105 | #include "gregset.h" |
| 106 | |
| 107 | /* =================== TARGET_OPS "MODULE" =================== */ |
| 108 | |
| 109 | /* This module defines the GDB target vector and its methods. */ |
| 110 | |
| 111 | static void procfs_attach (struct target_ops *, const char *, int); |
| 112 | static void procfs_detach (struct target_ops *, const char *, int); |
| 113 | static void procfs_resume (struct target_ops *, |
| 114 | ptid_t, int, enum gdb_signal); |
| 115 | static void procfs_interrupt (struct target_ops *self, ptid_t); |
| 116 | static void procfs_files_info (struct target_ops *); |
| 117 | static void procfs_fetch_registers (struct target_ops *, |
| 118 | struct regcache *, int); |
| 119 | static void procfs_store_registers (struct target_ops *, |
| 120 | struct regcache *, int); |
| 121 | static void procfs_pass_signals (struct target_ops *self, |
| 122 | int, unsigned char *); |
| 123 | static void procfs_kill_inferior (struct target_ops *ops); |
| 124 | static void procfs_mourn_inferior (struct target_ops *ops); |
| 125 | static void procfs_create_inferior (struct target_ops *, char *, |
| 126 | char *, char **, int); |
| 127 | static ptid_t procfs_wait (struct target_ops *, |
| 128 | ptid_t, struct target_waitstatus *, int); |
| 129 | static enum target_xfer_status procfs_xfer_memory (gdb_byte *, |
| 130 | const gdb_byte *, |
| 131 | ULONGEST, ULONGEST, |
| 132 | ULONGEST *); |
| 133 | static target_xfer_partial_ftype procfs_xfer_partial; |
| 134 | |
| 135 | static int procfs_thread_alive (struct target_ops *ops, ptid_t); |
| 136 | |
| 137 | static void procfs_update_thread_list (struct target_ops *ops); |
| 138 | static char *procfs_pid_to_str (struct target_ops *, ptid_t); |
| 139 | |
| 140 | static int proc_find_memory_regions (struct target_ops *self, |
| 141 | find_memory_region_ftype, void *); |
| 142 | |
| 143 | static char * procfs_make_note_section (struct target_ops *self, |
| 144 | bfd *, int *); |
| 145 | |
| 146 | static int procfs_can_use_hw_breakpoint (struct target_ops *self, |
| 147 | enum bptype, int, int); |
| 148 | |
| 149 | static void procfs_info_proc (struct target_ops *, const char *, |
| 150 | enum info_proc_what); |
| 151 | |
| 152 | #if defined (PR_MODEL_NATIVE) && (PR_MODEL_NATIVE == PR_MODEL_LP64) |
| 153 | /* When GDB is built as 64-bit application on Solaris, the auxv data |
| 154 | is presented in 64-bit format. We need to provide a custom parser |
| 155 | to handle that. */ |
| 156 | static int |
| 157 | procfs_auxv_parse (struct target_ops *ops, gdb_byte **readptr, |
| 158 | gdb_byte *endptr, CORE_ADDR *typep, CORE_ADDR *valp) |
| 159 | { |
| 160 | enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch ()); |
| 161 | gdb_byte *ptr = *readptr; |
| 162 | |
| 163 | if (endptr == ptr) |
| 164 | return 0; |
| 165 | |
| 166 | if (endptr - ptr < 8 * 2) |
| 167 | return -1; |
| 168 | |
| 169 | *typep = extract_unsigned_integer (ptr, 4, byte_order); |
| 170 | ptr += 8; |
| 171 | /* The size of data is always 64-bit. If the application is 32-bit, |
| 172 | it will be zero extended, as expected. */ |
| 173 | *valp = extract_unsigned_integer (ptr, 8, byte_order); |
| 174 | ptr += 8; |
| 175 | |
| 176 | *readptr = ptr; |
| 177 | return 1; |
| 178 | } |
| 179 | #endif |
| 180 | |
| 181 | struct target_ops * |
| 182 | procfs_target (void) |
| 183 | { |
| 184 | struct target_ops *t = inf_child_target (); |
| 185 | |
| 186 | t->to_create_inferior = procfs_create_inferior; |
| 187 | t->to_kill = procfs_kill_inferior; |
| 188 | t->to_mourn_inferior = procfs_mourn_inferior; |
| 189 | t->to_attach = procfs_attach; |
| 190 | t->to_detach = procfs_detach; |
| 191 | t->to_wait = procfs_wait; |
| 192 | t->to_resume = procfs_resume; |
| 193 | t->to_fetch_registers = procfs_fetch_registers; |
| 194 | t->to_store_registers = procfs_store_registers; |
| 195 | t->to_xfer_partial = procfs_xfer_partial; |
| 196 | t->to_pass_signals = procfs_pass_signals; |
| 197 | t->to_files_info = procfs_files_info; |
| 198 | t->to_interrupt = procfs_interrupt; |
| 199 | |
| 200 | t->to_update_thread_list = procfs_update_thread_list; |
| 201 | t->to_thread_alive = procfs_thread_alive; |
| 202 | t->to_pid_to_str = procfs_pid_to_str; |
| 203 | |
| 204 | t->to_has_thread_control = tc_schedlock; |
| 205 | t->to_find_memory_regions = proc_find_memory_regions; |
| 206 | t->to_make_corefile_notes = procfs_make_note_section; |
| 207 | t->to_info_proc = procfs_info_proc; |
| 208 | |
| 209 | #if defined(PR_MODEL_NATIVE) && (PR_MODEL_NATIVE == PR_MODEL_LP64) |
| 210 | t->to_auxv_parse = procfs_auxv_parse; |
| 211 | #endif |
| 212 | |
| 213 | t->to_magic = OPS_MAGIC; |
| 214 | |
| 215 | return t; |
| 216 | } |
| 217 | |
| 218 | /* =================== END, TARGET_OPS "MODULE" =================== */ |
| 219 | |
| 220 | /* World Unification: |
| 221 | |
| 222 | Put any typedefs, defines etc. here that are required for the |
| 223 | unification of code that handles different versions of /proc. */ |
| 224 | |
| 225 | #ifdef NEW_PROC_API /* Solaris 7 && 8 method for watchpoints */ |
| 226 | #ifdef WA_READ |
| 227 | enum { READ_WATCHFLAG = WA_READ, |
| 228 | WRITE_WATCHFLAG = WA_WRITE, |
| 229 | EXEC_WATCHFLAG = WA_EXEC, |
| 230 | AFTER_WATCHFLAG = WA_TRAPAFTER |
| 231 | }; |
| 232 | #endif |
| 233 | #else /* Irix method for watchpoints */ |
| 234 | enum { READ_WATCHFLAG = MA_READ, |
| 235 | WRITE_WATCHFLAG = MA_WRITE, |
| 236 | EXEC_WATCHFLAG = MA_EXEC, |
| 237 | AFTER_WATCHFLAG = 0 /* trapafter not implemented */ |
| 238 | }; |
| 239 | #endif |
| 240 | |
| 241 | /* gdb_sigset_t */ |
| 242 | #ifdef HAVE_PR_SIGSET_T |
| 243 | typedef pr_sigset_t gdb_sigset_t; |
| 244 | #else |
| 245 | typedef sigset_t gdb_sigset_t; |
| 246 | #endif |
| 247 | |
| 248 | /* sigaction */ |
| 249 | #ifdef HAVE_PR_SIGACTION64_T |
| 250 | typedef pr_sigaction64_t gdb_sigaction_t; |
| 251 | #else |
| 252 | typedef struct sigaction gdb_sigaction_t; |
| 253 | #endif |
| 254 | |
| 255 | /* siginfo */ |
| 256 | #ifdef HAVE_PR_SIGINFO64_T |
| 257 | typedef pr_siginfo64_t gdb_siginfo_t; |
| 258 | #else |
| 259 | typedef siginfo_t gdb_siginfo_t; |
| 260 | #endif |
| 261 | |
| 262 | /* On mips-irix, praddset and prdelset are defined in such a way that |
| 263 | they return a value, which causes GCC to emit a -Wunused error |
| 264 | because the returned value is not used. Prevent this warning |
| 265 | by casting the return value to void. On sparc-solaris, this issue |
| 266 | does not exist because the definition of these macros already include |
| 267 | that cast to void. */ |
| 268 | #define gdb_praddset(sp, flag) ((void) praddset (sp, flag)) |
| 269 | #define gdb_prdelset(sp, flag) ((void) prdelset (sp, flag)) |
| 270 | |
| 271 | /* gdb_premptysysset */ |
| 272 | #ifdef premptysysset |
| 273 | #define gdb_premptysysset premptysysset |
| 274 | #else |
| 275 | #define gdb_premptysysset premptyset |
| 276 | #endif |
| 277 | |
| 278 | /* praddsysset */ |
| 279 | #ifdef praddsysset |
| 280 | #define gdb_praddsysset praddsysset |
| 281 | #else |
| 282 | #define gdb_praddsysset gdb_praddset |
| 283 | #endif |
| 284 | |
| 285 | /* prdelsysset */ |
| 286 | #ifdef prdelsysset |
| 287 | #define gdb_prdelsysset prdelsysset |
| 288 | #else |
| 289 | #define gdb_prdelsysset gdb_prdelset |
| 290 | #endif |
| 291 | |
| 292 | /* prissyssetmember */ |
| 293 | #ifdef prissyssetmember |
| 294 | #define gdb_pr_issyssetmember prissyssetmember |
| 295 | #else |
| 296 | #define gdb_pr_issyssetmember prismember |
| 297 | #endif |
| 298 | |
| 299 | /* As a feature test, saying ``#if HAVE_PRSYSENT_T'' everywhere isn't |
| 300 | as intuitively descriptive as it could be, so we'll define |
| 301 | DYNAMIC_SYSCALLS to mean the same thing. Anyway, at the time of |
| 302 | this writing, this feature is only found on AIX5 systems and |
| 303 | basically means that the set of syscalls is not fixed. I.e, |
| 304 | there's no nice table that one can #include to get all of the |
| 305 | syscall numbers. Instead, they're stored in /proc/PID/sysent |
| 306 | for each process. We are at least guaranteed that they won't |
| 307 | change over the lifetime of the process. But each process could |
| 308 | (in theory) have different syscall numbers. */ |
| 309 | #ifdef HAVE_PRSYSENT_T |
| 310 | #define DYNAMIC_SYSCALLS |
| 311 | #endif |
| 312 | |
| 313 | |
| 314 | |
| 315 | /* =================== STRUCT PROCINFO "MODULE" =================== */ |
| 316 | |
| 317 | /* FIXME: this comment will soon be out of date W.R.T. threads. */ |
| 318 | |
| 319 | /* The procinfo struct is a wrapper to hold all the state information |
| 320 | concerning a /proc process. There should be exactly one procinfo |
| 321 | for each process, and since GDB currently can debug only one |
| 322 | process at a time, that means there should be only one procinfo. |
| 323 | All of the LWP's of a process can be accessed indirectly thru the |
| 324 | single process procinfo. |
| 325 | |
| 326 | However, against the day when GDB may debug more than one process, |
| 327 | this data structure is kept in a list (which for now will hold no |
| 328 | more than one member), and many functions will have a pointer to a |
| 329 | procinfo as an argument. |
| 330 | |
| 331 | There will be a separate procinfo structure for use by the (not yet |
| 332 | implemented) "info proc" command, so that we can print useful |
| 333 | information about any random process without interfering with the |
| 334 | inferior's procinfo information. */ |
| 335 | |
| 336 | #ifdef NEW_PROC_API |
| 337 | /* format strings for /proc paths */ |
| 338 | # ifndef CTL_PROC_NAME_FMT |
| 339 | # define MAIN_PROC_NAME_FMT "/proc/%d" |
| 340 | # define CTL_PROC_NAME_FMT "/proc/%d/ctl" |
| 341 | # define AS_PROC_NAME_FMT "/proc/%d/as" |
| 342 | # define MAP_PROC_NAME_FMT "/proc/%d/map" |
| 343 | # define STATUS_PROC_NAME_FMT "/proc/%d/status" |
| 344 | # define MAX_PROC_NAME_SIZE sizeof("/proc/99999/lwp/8096/lstatus") |
| 345 | # endif |
| 346 | /* the name of the proc status struct depends on the implementation */ |
| 347 | typedef pstatus_t gdb_prstatus_t; |
| 348 | typedef lwpstatus_t gdb_lwpstatus_t; |
| 349 | #else /* ! NEW_PROC_API */ |
| 350 | /* format strings for /proc paths */ |
| 351 | # ifndef CTL_PROC_NAME_FMT |
| 352 | # define MAIN_PROC_NAME_FMT "/proc/%05d" |
| 353 | # define CTL_PROC_NAME_FMT "/proc/%05d" |
| 354 | # define AS_PROC_NAME_FMT "/proc/%05d" |
| 355 | # define MAP_PROC_NAME_FMT "/proc/%05d" |
| 356 | # define STATUS_PROC_NAME_FMT "/proc/%05d" |
| 357 | # define MAX_PROC_NAME_SIZE sizeof("/proc/ttttppppp") |
| 358 | # endif |
| 359 | /* The name of the proc status struct depends on the implementation. */ |
| 360 | typedef prstatus_t gdb_prstatus_t; |
| 361 | typedef prstatus_t gdb_lwpstatus_t; |
| 362 | #endif /* NEW_PROC_API */ |
| 363 | |
| 364 | typedef struct procinfo { |
| 365 | struct procinfo *next; |
| 366 | int pid; /* Process ID */ |
| 367 | int tid; /* Thread/LWP id */ |
| 368 | |
| 369 | /* process state */ |
| 370 | int was_stopped; |
| 371 | int ignore_next_sigstop; |
| 372 | |
| 373 | /* The following four fd fields may be identical, or may contain |
| 374 | several different fd's, depending on the version of /proc |
| 375 | (old ioctl or new read/write). */ |
| 376 | |
| 377 | int ctl_fd; /* File descriptor for /proc control file */ |
| 378 | |
| 379 | /* The next three file descriptors are actually only needed in the |
| 380 | read/write, multiple-file-descriptor implemenation |
| 381 | (NEW_PROC_API). However, to avoid a bunch of #ifdefs in the |
| 382 | code, we will use them uniformly by (in the case of the ioctl |
| 383 | single-file-descriptor implementation) filling them with copies |
| 384 | of the control fd. */ |
| 385 | int status_fd; /* File descriptor for /proc status file */ |
| 386 | int as_fd; /* File descriptor for /proc as file */ |
| 387 | |
| 388 | char pathname[MAX_PROC_NAME_SIZE]; /* Pathname to /proc entry */ |
| 389 | |
| 390 | fltset_t saved_fltset; /* Saved traced hardware fault set */ |
| 391 | gdb_sigset_t saved_sigset; /* Saved traced signal set */ |
| 392 | gdb_sigset_t saved_sighold; /* Saved held signal set */ |
| 393 | sysset_t *saved_exitset; /* Saved traced system call exit set */ |
| 394 | sysset_t *saved_entryset; /* Saved traced system call entry set */ |
| 395 | |
| 396 | gdb_prstatus_t prstatus; /* Current process status info */ |
| 397 | |
| 398 | #ifndef NEW_PROC_API |
| 399 | gdb_fpregset_t fpregset; /* Current floating point registers */ |
| 400 | #endif |
| 401 | |
| 402 | #ifdef DYNAMIC_SYSCALLS |
| 403 | int num_syscalls; /* Total number of syscalls */ |
| 404 | char **syscall_names; /* Syscall number to name map */ |
| 405 | #endif |
| 406 | |
| 407 | struct procinfo *thread_list; |
| 408 | |
| 409 | int status_valid : 1; |
| 410 | int gregs_valid : 1; |
| 411 | int fpregs_valid : 1; |
| 412 | int threads_valid: 1; |
| 413 | } procinfo; |
| 414 | |
| 415 | static char errmsg[128]; /* shared error msg buffer */ |
| 416 | |
| 417 | /* Function prototypes for procinfo module: */ |
| 418 | |
| 419 | static procinfo *find_procinfo_or_die (int pid, int tid); |
| 420 | static procinfo *find_procinfo (int pid, int tid); |
| 421 | static procinfo *create_procinfo (int pid, int tid); |
| 422 | static void destroy_procinfo (procinfo * p); |
| 423 | static void do_destroy_procinfo_cleanup (void *); |
| 424 | static void dead_procinfo (procinfo * p, char *msg, int killp); |
| 425 | static int open_procinfo_files (procinfo * p, int which); |
| 426 | static void close_procinfo_files (procinfo * p); |
| 427 | static int sysset_t_size (procinfo *p); |
| 428 | static sysset_t *sysset_t_alloc (procinfo * pi); |
| 429 | #ifdef DYNAMIC_SYSCALLS |
| 430 | static void load_syscalls (procinfo *pi); |
| 431 | static void free_syscalls (procinfo *pi); |
| 432 | static int find_syscall (procinfo *pi, char *name); |
| 433 | #endif /* DYNAMIC_SYSCALLS */ |
| 434 | |
| 435 | static int iterate_over_mappings |
| 436 | (procinfo *pi, find_memory_region_ftype child_func, void *data, |
| 437 | int (*func) (struct prmap *map, find_memory_region_ftype child_func, |
| 438 | void *data)); |
| 439 | |
| 440 | /* The head of the procinfo list: */ |
| 441 | static procinfo * procinfo_list; |
| 442 | |
| 443 | /* Search the procinfo list. Return a pointer to procinfo, or NULL if |
| 444 | not found. */ |
| 445 | |
| 446 | static procinfo * |
| 447 | find_procinfo (int pid, int tid) |
| 448 | { |
| 449 | procinfo *pi; |
| 450 | |
| 451 | for (pi = procinfo_list; pi; pi = pi->next) |
| 452 | if (pi->pid == pid) |
| 453 | break; |
| 454 | |
| 455 | if (pi) |
| 456 | if (tid) |
| 457 | { |
| 458 | /* Don't check threads_valid. If we're updating the |
| 459 | thread_list, we want to find whatever threads are already |
| 460 | here. This means that in general it is the caller's |
| 461 | responsibility to check threads_valid and update before |
| 462 | calling find_procinfo, if the caller wants to find a new |
| 463 | thread. */ |
| 464 | |
| 465 | for (pi = pi->thread_list; pi; pi = pi->next) |
| 466 | if (pi->tid == tid) |
| 467 | break; |
| 468 | } |
| 469 | |
| 470 | return pi; |
| 471 | } |
| 472 | |
| 473 | /* Calls find_procinfo, but errors on failure. */ |
| 474 | |
| 475 | static procinfo * |
| 476 | find_procinfo_or_die (int pid, int tid) |
| 477 | { |
| 478 | procinfo *pi = find_procinfo (pid, tid); |
| 479 | |
| 480 | if (pi == NULL) |
| 481 | { |
| 482 | if (tid) |
| 483 | error (_("procfs: couldn't find pid %d " |
| 484 | "(kernel thread %d) in procinfo list."), |
| 485 | pid, tid); |
| 486 | else |
| 487 | error (_("procfs: couldn't find pid %d in procinfo list."), pid); |
| 488 | } |
| 489 | return pi; |
| 490 | } |
| 491 | |
| 492 | /* Wrapper for `open'. The appropriate open call is attempted; if |
| 493 | unsuccessful, it will be retried as many times as needed for the |
| 494 | EAGAIN and EINTR conditions. |
| 495 | |
| 496 | For other conditions, retry the open a limited number of times. In |
| 497 | addition, a short sleep is imposed prior to retrying the open. The |
| 498 | reason for this sleep is to give the kernel a chance to catch up |
| 499 | and create the file in question in the event that GDB "wins" the |
| 500 | race to open a file before the kernel has created it. */ |
| 501 | |
| 502 | static int |
| 503 | open_with_retry (const char *pathname, int flags) |
| 504 | { |
| 505 | int retries_remaining, status; |
| 506 | |
| 507 | retries_remaining = 2; |
| 508 | |
| 509 | while (1) |
| 510 | { |
| 511 | status = open (pathname, flags); |
| 512 | |
| 513 | if (status >= 0 || retries_remaining == 0) |
| 514 | break; |
| 515 | else if (errno != EINTR && errno != EAGAIN) |
| 516 | { |
| 517 | retries_remaining--; |
| 518 | sleep (1); |
| 519 | } |
| 520 | } |
| 521 | |
| 522 | return status; |
| 523 | } |
| 524 | |
| 525 | /* Open the file descriptor for the process or LWP. If NEW_PROC_API |
| 526 | is defined, we only open the control file descriptor; the others |
| 527 | are opened lazily as needed. Otherwise (if not NEW_PROC_API), |
| 528 | there is only one real file descriptor, but we keep multiple copies |
| 529 | of it so that the code that uses them does not have to be #ifdef'd. |
| 530 | Returns the file descriptor, or zero for failure. */ |
| 531 | |
| 532 | enum { FD_CTL, FD_STATUS, FD_AS }; |
| 533 | |
| 534 | static int |
| 535 | open_procinfo_files (procinfo *pi, int which) |
| 536 | { |
| 537 | #ifdef NEW_PROC_API |
| 538 | char tmp[MAX_PROC_NAME_SIZE]; |
| 539 | #endif |
| 540 | int fd; |
| 541 | |
| 542 | /* This function is getting ALMOST long enough to break up into |
| 543 | several. Here is some rationale: |
| 544 | |
| 545 | NEW_PROC_API (Solaris 2.6, Solaris 2.7): |
| 546 | There are several file descriptors that may need to be open |
| 547 | for any given process or LWP. The ones we're intereted in are: |
| 548 | - control (ctl) write-only change the state |
| 549 | - status (status) read-only query the state |
| 550 | - address space (as) read/write access memory |
| 551 | - map (map) read-only virtual addr map |
| 552 | Most of these are opened lazily as they are needed. |
| 553 | The pathnames for the 'files' for an LWP look slightly |
| 554 | different from those of a first-class process: |
| 555 | Pathnames for a process (<proc-id>): |
| 556 | /proc/<proc-id>/ctl |
| 557 | /proc/<proc-id>/status |
| 558 | /proc/<proc-id>/as |
| 559 | /proc/<proc-id>/map |
| 560 | Pathnames for an LWP (lwp-id): |
| 561 | /proc/<proc-id>/lwp/<lwp-id>/lwpctl |
| 562 | /proc/<proc-id>/lwp/<lwp-id>/lwpstatus |
| 563 | An LWP has no map or address space file descriptor, since |
| 564 | the memory map and address space are shared by all LWPs. |
| 565 | |
| 566 | Everyone else (Solaris 2.5, Irix, OSF) |
| 567 | There is only one file descriptor for each process or LWP. |
| 568 | For convenience, we copy the same file descriptor into all |
| 569 | three fields of the procinfo struct (ctl_fd, status_fd, and |
| 570 | as_fd, see NEW_PROC_API above) so that code that uses them |
| 571 | doesn't need any #ifdef's. |
| 572 | Pathname for all: |
| 573 | /proc/<proc-id> |
| 574 | |
| 575 | Solaris 2.5 LWP's: |
| 576 | Each LWP has an independent file descriptor, but these |
| 577 | are not obtained via the 'open' system call like the rest: |
| 578 | instead, they're obtained thru an ioctl call (PIOCOPENLWP) |
| 579 | to the file descriptor of the parent process. |
| 580 | |
| 581 | OSF threads: |
| 582 | These do not even have their own independent file descriptor. |
| 583 | All operations are carried out on the file descriptor of the |
| 584 | parent process. Therefore we just call open again for each |
| 585 | thread, getting a new handle for the same 'file'. */ |
| 586 | |
| 587 | #ifdef NEW_PROC_API |
| 588 | /* In this case, there are several different file descriptors that |
| 589 | we might be asked to open. The control file descriptor will be |
| 590 | opened early, but the others will be opened lazily as they are |
| 591 | needed. */ |
| 592 | |
| 593 | strcpy (tmp, pi->pathname); |
| 594 | switch (which) { /* Which file descriptor to open? */ |
| 595 | case FD_CTL: |
| 596 | if (pi->tid) |
| 597 | strcat (tmp, "/lwpctl"); |
| 598 | else |
| 599 | strcat (tmp, "/ctl"); |
| 600 | fd = open_with_retry (tmp, O_WRONLY); |
| 601 | if (fd < 0) |
| 602 | return 0; /* fail */ |
| 603 | pi->ctl_fd = fd; |
| 604 | break; |
| 605 | case FD_AS: |
| 606 | if (pi->tid) |
| 607 | return 0; /* There is no 'as' file descriptor for an lwp. */ |
| 608 | strcat (tmp, "/as"); |
| 609 | fd = open_with_retry (tmp, O_RDWR); |
| 610 | if (fd < 0) |
| 611 | return 0; /* fail */ |
| 612 | pi->as_fd = fd; |
| 613 | break; |
| 614 | case FD_STATUS: |
| 615 | if (pi->tid) |
| 616 | strcat (tmp, "/lwpstatus"); |
| 617 | else |
| 618 | strcat (tmp, "/status"); |
| 619 | fd = open_with_retry (tmp, O_RDONLY); |
| 620 | if (fd < 0) |
| 621 | return 0; /* fail */ |
| 622 | pi->status_fd = fd; |
| 623 | break; |
| 624 | default: |
| 625 | return 0; /* unknown file descriptor */ |
| 626 | } |
| 627 | #else /* not NEW_PROC_API */ |
| 628 | /* In this case, there is only one file descriptor for each procinfo |
| 629 | (ie. each process or LWP). In fact, only the file descriptor for |
| 630 | the process can actually be opened by an 'open' system call. The |
| 631 | ones for the LWPs have to be obtained thru an IOCTL call on the |
| 632 | process's file descriptor. |
| 633 | |
| 634 | For convenience, we copy each procinfo's single file descriptor |
| 635 | into all of the fields occupied by the several file descriptors |
| 636 | of the NEW_PROC_API implementation. That way, the code that uses |
| 637 | them can be written without ifdefs. */ |
| 638 | |
| 639 | |
| 640 | #ifdef PIOCTSTATUS /* OSF */ |
| 641 | /* Only one FD; just open it. */ |
| 642 | if ((fd = open_with_retry (pi->pathname, O_RDWR)) < 0) |
| 643 | return 0; |
| 644 | #else /* Sol 2.5, Irix, other? */ |
| 645 | if (pi->tid == 0) /* Master procinfo for the process */ |
| 646 | { |
| 647 | fd = open_with_retry (pi->pathname, O_RDWR); |
| 648 | if (fd < 0) |
| 649 | return 0; /* fail */ |
| 650 | } |
| 651 | else /* LWP thread procinfo */ |
| 652 | { |
| 653 | #ifdef PIOCOPENLWP /* Sol 2.5, thread/LWP */ |
| 654 | procinfo *process; |
| 655 | int lwpid = pi->tid; |
| 656 | |
| 657 | /* Find the procinfo for the entire process. */ |
| 658 | if ((process = find_procinfo (pi->pid, 0)) == NULL) |
| 659 | return 0; /* fail */ |
| 660 | |
| 661 | /* Now obtain the file descriptor for the LWP. */ |
| 662 | if ((fd = ioctl (process->ctl_fd, PIOCOPENLWP, &lwpid)) < 0) |
| 663 | return 0; /* fail */ |
| 664 | #else /* Irix, other? */ |
| 665 | return 0; /* Don't know how to open threads. */ |
| 666 | #endif /* Sol 2.5 PIOCOPENLWP */ |
| 667 | } |
| 668 | #endif /* OSF PIOCTSTATUS */ |
| 669 | pi->ctl_fd = pi->as_fd = pi->status_fd = fd; |
| 670 | #endif /* NEW_PROC_API */ |
| 671 | |
| 672 | return 1; /* success */ |
| 673 | } |
| 674 | |
| 675 | /* Allocate a data structure and link it into the procinfo list. |
| 676 | First tries to find a pre-existing one (FIXME: why?). Returns the |
| 677 | pointer to new procinfo struct. */ |
| 678 | |
| 679 | static procinfo * |
| 680 | create_procinfo (int pid, int tid) |
| 681 | { |
| 682 | procinfo *pi, *parent = NULL; |
| 683 | |
| 684 | if ((pi = find_procinfo (pid, tid))) |
| 685 | return pi; /* Already exists, nothing to do. */ |
| 686 | |
| 687 | /* Find parent before doing malloc, to save having to cleanup. */ |
| 688 | if (tid != 0) |
| 689 | parent = find_procinfo_or_die (pid, 0); /* FIXME: should I |
| 690 | create it if it |
| 691 | doesn't exist yet? */ |
| 692 | |
| 693 | pi = XNEW (procinfo); |
| 694 | memset (pi, 0, sizeof (procinfo)); |
| 695 | pi->pid = pid; |
| 696 | pi->tid = tid; |
| 697 | |
| 698 | #ifdef DYNAMIC_SYSCALLS |
| 699 | load_syscalls (pi); |
| 700 | #endif |
| 701 | |
| 702 | pi->saved_entryset = sysset_t_alloc (pi); |
| 703 | pi->saved_exitset = sysset_t_alloc (pi); |
| 704 | |
| 705 | /* Chain into list. */ |
| 706 | if (tid == 0) |
| 707 | { |
| 708 | sprintf (pi->pathname, MAIN_PROC_NAME_FMT, pid); |
| 709 | pi->next = procinfo_list; |
| 710 | procinfo_list = pi; |
| 711 | } |
| 712 | else |
| 713 | { |
| 714 | #ifdef NEW_PROC_API |
| 715 | sprintf (pi->pathname, "/proc/%05d/lwp/%d", pid, tid); |
| 716 | #else |
| 717 | sprintf (pi->pathname, MAIN_PROC_NAME_FMT, pid); |
| 718 | #endif |
| 719 | pi->next = parent->thread_list; |
| 720 | parent->thread_list = pi; |
| 721 | } |
| 722 | return pi; |
| 723 | } |
| 724 | |
| 725 | /* Close all file descriptors associated with the procinfo. */ |
| 726 | |
| 727 | static void |
| 728 | close_procinfo_files (procinfo *pi) |
| 729 | { |
| 730 | if (pi->ctl_fd > 0) |
| 731 | close (pi->ctl_fd); |
| 732 | #ifdef NEW_PROC_API |
| 733 | if (pi->as_fd > 0) |
| 734 | close (pi->as_fd); |
| 735 | if (pi->status_fd > 0) |
| 736 | close (pi->status_fd); |
| 737 | #endif |
| 738 | pi->ctl_fd = pi->as_fd = pi->status_fd = 0; |
| 739 | } |
| 740 | |
| 741 | /* Destructor function. Close, unlink and deallocate the object. */ |
| 742 | |
| 743 | static void |
| 744 | destroy_one_procinfo (procinfo **list, procinfo *pi) |
| 745 | { |
| 746 | procinfo *ptr; |
| 747 | |
| 748 | /* Step one: unlink the procinfo from its list. */ |
| 749 | if (pi == *list) |
| 750 | *list = pi->next; |
| 751 | else |
| 752 | for (ptr = *list; ptr; ptr = ptr->next) |
| 753 | if (ptr->next == pi) |
| 754 | { |
| 755 | ptr->next = pi->next; |
| 756 | break; |
| 757 | } |
| 758 | |
| 759 | /* Step two: close any open file descriptors. */ |
| 760 | close_procinfo_files (pi); |
| 761 | |
| 762 | /* Step three: free the memory. */ |
| 763 | #ifdef DYNAMIC_SYSCALLS |
| 764 | free_syscalls (pi); |
| 765 | #endif |
| 766 | xfree (pi->saved_entryset); |
| 767 | xfree (pi->saved_exitset); |
| 768 | xfree (pi); |
| 769 | } |
| 770 | |
| 771 | static void |
| 772 | destroy_procinfo (procinfo *pi) |
| 773 | { |
| 774 | procinfo *tmp; |
| 775 | |
| 776 | if (pi->tid != 0) /* Destroy a thread procinfo. */ |
| 777 | { |
| 778 | tmp = find_procinfo (pi->pid, 0); /* Find the parent process. */ |
| 779 | destroy_one_procinfo (&tmp->thread_list, pi); |
| 780 | } |
| 781 | else /* Destroy a process procinfo and all its threads. */ |
| 782 | { |
| 783 | /* First destroy the children, if any; */ |
| 784 | while (pi->thread_list != NULL) |
| 785 | destroy_one_procinfo (&pi->thread_list, pi->thread_list); |
| 786 | /* Then destroy the parent. Genocide!!! */ |
| 787 | destroy_one_procinfo (&procinfo_list, pi); |
| 788 | } |
| 789 | } |
| 790 | |
| 791 | static void |
| 792 | do_destroy_procinfo_cleanup (void *pi) |
| 793 | { |
| 794 | destroy_procinfo (pi); |
| 795 | } |
| 796 | |
| 797 | enum { NOKILL, KILL }; |
| 798 | |
| 799 | /* To be called on a non_recoverable error for a procinfo. Prints |
| 800 | error messages, optionally sends a SIGKILL to the process, then |
| 801 | destroys the data structure. */ |
| 802 | |
| 803 | static void |
| 804 | dead_procinfo (procinfo *pi, char *msg, int kill_p) |
| 805 | { |
| 806 | char procfile[80]; |
| 807 | |
| 808 | if (pi->pathname) |
| 809 | { |
| 810 | print_sys_errmsg (pi->pathname, errno); |
| 811 | } |
| 812 | else |
| 813 | { |
| 814 | sprintf (procfile, "process %d", pi->pid); |
| 815 | print_sys_errmsg (procfile, errno); |
| 816 | } |
| 817 | if (kill_p == KILL) |
| 818 | kill (pi->pid, SIGKILL); |
| 819 | |
| 820 | destroy_procinfo (pi); |
| 821 | error ("%s", msg); |
| 822 | } |
| 823 | |
| 824 | /* Returns the (complete) size of a sysset_t struct. Normally, this |
| 825 | is just sizeof (sysset_t), but in the case of Monterey/64, the |
| 826 | actual size of sysset_t isn't known until runtime. */ |
| 827 | |
| 828 | static int |
| 829 | sysset_t_size (procinfo * pi) |
| 830 | { |
| 831 | #ifndef DYNAMIC_SYSCALLS |
| 832 | return sizeof (sysset_t); |
| 833 | #else |
| 834 | return sizeof (sysset_t) - sizeof (uint64_t) |
| 835 | + sizeof (uint64_t) * ((pi->num_syscalls + (8 * sizeof (uint64_t) - 1)) |
| 836 | / (8 * sizeof (uint64_t))); |
| 837 | #endif |
| 838 | } |
| 839 | |
| 840 | /* Allocate and (partially) initialize a sysset_t struct. */ |
| 841 | |
| 842 | static sysset_t * |
| 843 | sysset_t_alloc (procinfo * pi) |
| 844 | { |
| 845 | sysset_t *ret; |
| 846 | int size = sysset_t_size (pi); |
| 847 | |
| 848 | ret = xmalloc (size); |
| 849 | #ifdef DYNAMIC_SYSCALLS |
| 850 | ret->pr_size = ((pi->num_syscalls + (8 * sizeof (uint64_t) - 1)) |
| 851 | / (8 * sizeof (uint64_t))); |
| 852 | #endif |
| 853 | return ret; |
| 854 | } |
| 855 | |
| 856 | #ifdef DYNAMIC_SYSCALLS |
| 857 | |
| 858 | /* Extract syscall numbers and names from /proc/<pid>/sysent. Initialize |
| 859 | pi->num_syscalls with the number of syscalls and pi->syscall_names |
| 860 | with the names. (Certain numbers may be skipped in which case the |
| 861 | names for these numbers will be left as NULL.) */ |
| 862 | |
| 863 | #define MAX_SYSCALL_NAME_LENGTH 256 |
| 864 | #define MAX_SYSCALLS 65536 |
| 865 | |
| 866 | static void |
| 867 | load_syscalls (procinfo *pi) |
| 868 | { |
| 869 | char pathname[MAX_PROC_NAME_SIZE]; |
| 870 | int sysent_fd; |
| 871 | prsysent_t header; |
| 872 | prsyscall_t *syscalls; |
| 873 | int i, size, maxcall; |
| 874 | struct cleanup *cleanups; |
| 875 | |
| 876 | pi->num_syscalls = 0; |
| 877 | pi->syscall_names = 0; |
| 878 | |
| 879 | /* Open the file descriptor for the sysent file. */ |
| 880 | sprintf (pathname, "/proc/%d/sysent", pi->pid); |
| 881 | sysent_fd = open_with_retry (pathname, O_RDONLY); |
| 882 | if (sysent_fd < 0) |
| 883 | { |
| 884 | error (_("load_syscalls: Can't open /proc/%d/sysent"), pi->pid); |
| 885 | } |
| 886 | cleanups = make_cleanup_close (sysent_fd); |
| 887 | |
| 888 | size = sizeof header - sizeof (prsyscall_t); |
| 889 | if (read (sysent_fd, &header, size) != size) |
| 890 | { |
| 891 | error (_("load_syscalls: Error reading /proc/%d/sysent"), pi->pid); |
| 892 | } |
| 893 | |
| 894 | if (header.pr_nsyscalls == 0) |
| 895 | { |
| 896 | error (_("load_syscalls: /proc/%d/sysent contains no syscalls!"), |
| 897 | pi->pid); |
| 898 | } |
| 899 | |
| 900 | size = header.pr_nsyscalls * sizeof (prsyscall_t); |
| 901 | syscalls = xmalloc (size); |
| 902 | make_cleanup (free_current_contents, &syscalls); |
| 903 | |
| 904 | if (read (sysent_fd, syscalls, size) != size) |
| 905 | error (_("load_syscalls: Error reading /proc/%d/sysent"), pi->pid); |
| 906 | |
| 907 | /* Find maximum syscall number. This may not be the same as |
| 908 | pr_nsyscalls since that value refers to the number of entries |
| 909 | in the table. (Also, the docs indicate that some system |
| 910 | call numbers may be skipped.) */ |
| 911 | |
| 912 | maxcall = syscalls[0].pr_number; |
| 913 | |
| 914 | for (i = 1; i < header.pr_nsyscalls; i++) |
| 915 | if (syscalls[i].pr_number > maxcall |
| 916 | && syscalls[i].pr_nameoff > 0 |
| 917 | && syscalls[i].pr_number < MAX_SYSCALLS) |
| 918 | maxcall = syscalls[i].pr_number; |
| 919 | |
| 920 | pi->num_syscalls = maxcall+1; |
| 921 | pi->syscall_names = XNEWVEC (char *, pi->num_syscalls); |
| 922 | |
| 923 | for (i = 0; i < pi->num_syscalls; i++) |
| 924 | pi->syscall_names[i] = NULL; |
| 925 | |
| 926 | /* Read the syscall names in. */ |
| 927 | for (i = 0; i < header.pr_nsyscalls; i++) |
| 928 | { |
| 929 | char namebuf[MAX_SYSCALL_NAME_LENGTH]; |
| 930 | int nread; |
| 931 | int callnum; |
| 932 | |
| 933 | if (syscalls[i].pr_number >= MAX_SYSCALLS |
| 934 | || syscalls[i].pr_number < 0 |
| 935 | || syscalls[i].pr_nameoff <= 0 |
| 936 | || (lseek (sysent_fd, (off_t) syscalls[i].pr_nameoff, SEEK_SET) |
| 937 | != (off_t) syscalls[i].pr_nameoff)) |
| 938 | continue; |
| 939 | |
| 940 | nread = read (sysent_fd, namebuf, sizeof namebuf); |
| 941 | if (nread <= 0) |
| 942 | continue; |
| 943 | |
| 944 | callnum = syscalls[i].pr_number; |
| 945 | |
| 946 | if (pi->syscall_names[callnum] != NULL) |
| 947 | { |
| 948 | /* FIXME: Generate warning. */ |
| 949 | continue; |
| 950 | } |
| 951 | |
| 952 | namebuf[nread-1] = '\0'; |
| 953 | size = strlen (namebuf) + 1; |
| 954 | pi->syscall_names[callnum] = xmalloc (size); |
| 955 | strncpy (pi->syscall_names[callnum], namebuf, size-1); |
| 956 | pi->syscall_names[callnum][size-1] = '\0'; |
| 957 | } |
| 958 | |
| 959 | do_cleanups (cleanups); |
| 960 | } |
| 961 | |
| 962 | /* Free the space allocated for the syscall names from the procinfo |
| 963 | structure. */ |
| 964 | |
| 965 | static void |
| 966 | free_syscalls (procinfo *pi) |
| 967 | { |
| 968 | if (pi->syscall_names) |
| 969 | { |
| 970 | int i; |
| 971 | |
| 972 | for (i = 0; i < pi->num_syscalls; i++) |
| 973 | if (pi->syscall_names[i] != NULL) |
| 974 | xfree (pi->syscall_names[i]); |
| 975 | |
| 976 | xfree (pi->syscall_names); |
| 977 | pi->syscall_names = 0; |
| 978 | } |
| 979 | } |
| 980 | |
| 981 | /* Given a name, look up (and return) the corresponding syscall number. |
| 982 | If no match is found, return -1. */ |
| 983 | |
| 984 | static int |
| 985 | find_syscall (procinfo *pi, char *name) |
| 986 | { |
| 987 | int i; |
| 988 | |
| 989 | for (i = 0; i < pi->num_syscalls; i++) |
| 990 | { |
| 991 | if (pi->syscall_names[i] && strcmp (name, pi->syscall_names[i]) == 0) |
| 992 | return i; |
| 993 | } |
| 994 | return -1; |
| 995 | } |
| 996 | #endif |
| 997 | |
| 998 | /* =================== END, STRUCT PROCINFO "MODULE" =================== */ |
| 999 | |
| 1000 | /* =================== /proc "MODULE" =================== */ |
| 1001 | |
| 1002 | /* This "module" is the interface layer between the /proc system API |
| 1003 | and the gdb target vector functions. This layer consists of access |
| 1004 | functions that encapsulate each of the basic operations that we |
| 1005 | need to use from the /proc API. |
| 1006 | |
| 1007 | The main motivation for this layer is to hide the fact that there |
| 1008 | are two very different implementations of the /proc API. Rather |
| 1009 | than have a bunch of #ifdefs all thru the gdb target vector |
| 1010 | functions, we do our best to hide them all in here. */ |
| 1011 | |
| 1012 | static long proc_flags (procinfo * pi); |
| 1013 | static int proc_why (procinfo * pi); |
| 1014 | static int proc_what (procinfo * pi); |
| 1015 | static int proc_set_current_signal (procinfo * pi, int signo); |
| 1016 | static int proc_get_current_thread (procinfo * pi); |
| 1017 | static int proc_iterate_over_threads |
| 1018 | (procinfo * pi, |
| 1019 | int (*func) (procinfo *, procinfo *, void *), |
| 1020 | void *ptr); |
| 1021 | |
| 1022 | static void |
| 1023 | proc_warn (procinfo *pi, char *func, int line) |
| 1024 | { |
| 1025 | sprintf (errmsg, "procfs: %s line %d, %s", func, line, pi->pathname); |
| 1026 | print_sys_errmsg (errmsg, errno); |
| 1027 | } |
| 1028 | |
| 1029 | static void |
| 1030 | proc_error (procinfo *pi, char *func, int line) |
| 1031 | { |
| 1032 | sprintf (errmsg, "procfs: %s line %d, %s", func, line, pi->pathname); |
| 1033 | perror_with_name (errmsg); |
| 1034 | } |
| 1035 | |
| 1036 | /* Updates the status struct in the procinfo. There is a 'valid' |
| 1037 | flag, to let other functions know when this function needs to be |
| 1038 | called (so the status is only read when it is needed). The status |
| 1039 | file descriptor is also only opened when it is needed. Returns |
| 1040 | non-zero for success, zero for failure. */ |
| 1041 | |
| 1042 | static int |
| 1043 | proc_get_status (procinfo *pi) |
| 1044 | { |
| 1045 | /* Status file descriptor is opened "lazily". */ |
| 1046 | if (pi->status_fd == 0 && |
| 1047 | open_procinfo_files (pi, FD_STATUS) == 0) |
| 1048 | { |
| 1049 | pi->status_valid = 0; |
| 1050 | return 0; |
| 1051 | } |
| 1052 | |
| 1053 | #ifdef NEW_PROC_API |
| 1054 | if (lseek (pi->status_fd, 0, SEEK_SET) < 0) |
| 1055 | pi->status_valid = 0; /* fail */ |
| 1056 | else |
| 1057 | { |
| 1058 | /* Sigh... I have to read a different data structure, |
| 1059 | depending on whether this is a main process or an LWP. */ |
| 1060 | if (pi->tid) |
| 1061 | pi->status_valid = (read (pi->status_fd, |
| 1062 | (char *) &pi->prstatus.pr_lwp, |
| 1063 | sizeof (lwpstatus_t)) |
| 1064 | == sizeof (lwpstatus_t)); |
| 1065 | else |
| 1066 | { |
| 1067 | pi->status_valid = (read (pi->status_fd, |
| 1068 | (char *) &pi->prstatus, |
| 1069 | sizeof (gdb_prstatus_t)) |
| 1070 | == sizeof (gdb_prstatus_t)); |
| 1071 | } |
| 1072 | } |
| 1073 | #else /* ioctl method */ |
| 1074 | #ifdef PIOCTSTATUS /* osf */ |
| 1075 | if (pi->tid == 0) /* main process */ |
| 1076 | { |
| 1077 | /* Just read the danged status. Now isn't that simple? */ |
| 1078 | pi->status_valid = |
| 1079 | (ioctl (pi->status_fd, PIOCSTATUS, &pi->prstatus) >= 0); |
| 1080 | } |
| 1081 | else |
| 1082 | { |
| 1083 | int win; |
| 1084 | struct { |
| 1085 | long pr_count; |
| 1086 | tid_t pr_error_thread; |
| 1087 | struct prstatus status; |
| 1088 | } thread_status; |
| 1089 | |
| 1090 | thread_status.pr_count = 1; |
| 1091 | thread_status.status.pr_tid = pi->tid; |
| 1092 | win = (ioctl (pi->status_fd, PIOCTSTATUS, &thread_status) >= 0); |
| 1093 | if (win) |
| 1094 | { |
| 1095 | memcpy (&pi->prstatus, &thread_status.status, |
| 1096 | sizeof (pi->prstatus)); |
| 1097 | pi->status_valid = 1; |
| 1098 | } |
| 1099 | } |
| 1100 | #else |
| 1101 | /* Just read the danged status. Now isn't that simple? */ |
| 1102 | pi->status_valid = (ioctl (pi->status_fd, PIOCSTATUS, &pi->prstatus) >= 0); |
| 1103 | #endif |
| 1104 | #endif |
| 1105 | |
| 1106 | if (pi->status_valid) |
| 1107 | { |
| 1108 | PROC_PRETTYFPRINT_STATUS (proc_flags (pi), |
| 1109 | proc_why (pi), |
| 1110 | proc_what (pi), |
| 1111 | proc_get_current_thread (pi)); |
| 1112 | } |
| 1113 | |
| 1114 | /* The status struct includes general regs, so mark them valid too. */ |
| 1115 | pi->gregs_valid = pi->status_valid; |
| 1116 | #ifdef NEW_PROC_API |
| 1117 | /* In the read/write multiple-fd model, the status struct includes |
| 1118 | the fp regs too, so mark them valid too. */ |
| 1119 | pi->fpregs_valid = pi->status_valid; |
| 1120 | #endif |
| 1121 | return pi->status_valid; /* True if success, false if failure. */ |
| 1122 | } |
| 1123 | |
| 1124 | /* Returns the process flags (pr_flags field). */ |
| 1125 | |
| 1126 | static long |
| 1127 | proc_flags (procinfo *pi) |
| 1128 | { |
| 1129 | if (!pi->status_valid) |
| 1130 | if (!proc_get_status (pi)) |
| 1131 | return 0; /* FIXME: not a good failure value (but what is?) */ |
| 1132 | |
| 1133 | #ifdef NEW_PROC_API |
| 1134 | return pi->prstatus.pr_lwp.pr_flags; |
| 1135 | #else |
| 1136 | return pi->prstatus.pr_flags; |
| 1137 | #endif |
| 1138 | } |
| 1139 | |
| 1140 | /* Returns the pr_why field (why the process stopped). */ |
| 1141 | |
| 1142 | static int |
| 1143 | proc_why (procinfo *pi) |
| 1144 | { |
| 1145 | if (!pi->status_valid) |
| 1146 | if (!proc_get_status (pi)) |
| 1147 | return 0; /* FIXME: not a good failure value (but what is?) */ |
| 1148 | |
| 1149 | #ifdef NEW_PROC_API |
| 1150 | return pi->prstatus.pr_lwp.pr_why; |
| 1151 | #else |
| 1152 | return pi->prstatus.pr_why; |
| 1153 | #endif |
| 1154 | } |
| 1155 | |
| 1156 | /* Returns the pr_what field (details of why the process stopped). */ |
| 1157 | |
| 1158 | static int |
| 1159 | proc_what (procinfo *pi) |
| 1160 | { |
| 1161 | if (!pi->status_valid) |
| 1162 | if (!proc_get_status (pi)) |
| 1163 | return 0; /* FIXME: not a good failure value (but what is?) */ |
| 1164 | |
| 1165 | #ifdef NEW_PROC_API |
| 1166 | return pi->prstatus.pr_lwp.pr_what; |
| 1167 | #else |
| 1168 | return pi->prstatus.pr_what; |
| 1169 | #endif |
| 1170 | } |
| 1171 | |
| 1172 | /* This function is only called when PI is stopped by a watchpoint. |
| 1173 | Assuming the OS supports it, write to *ADDR the data address which |
| 1174 | triggered it and return 1. Return 0 if it is not possible to know |
| 1175 | the address. */ |
| 1176 | |
| 1177 | static int |
| 1178 | proc_watchpoint_address (procinfo *pi, CORE_ADDR *addr) |
| 1179 | { |
| 1180 | if (!pi->status_valid) |
| 1181 | if (!proc_get_status (pi)) |
| 1182 | return 0; |
| 1183 | |
| 1184 | #ifdef NEW_PROC_API |
| 1185 | *addr = (CORE_ADDR) gdbarch_pointer_to_address (target_gdbarch (), |
| 1186 | builtin_type (target_gdbarch ())->builtin_data_ptr, |
| 1187 | (gdb_byte *) &pi->prstatus.pr_lwp.pr_info.si_addr); |
| 1188 | #else |
| 1189 | *addr = (CORE_ADDR) gdbarch_pointer_to_address (target_gdbarch (), |
| 1190 | builtin_type (target_gdbarch ())->builtin_data_ptr, |
| 1191 | (gdb_byte *) &pi->prstatus.pr_info.si_addr); |
| 1192 | #endif |
| 1193 | return 1; |
| 1194 | } |
| 1195 | |
| 1196 | #ifndef PIOCSSPCACT /* The following is not supported on OSF. */ |
| 1197 | |
| 1198 | /* Returns the pr_nsysarg field (number of args to the current |
| 1199 | syscall). */ |
| 1200 | |
| 1201 | static int |
| 1202 | proc_nsysarg (procinfo *pi) |
| 1203 | { |
| 1204 | if (!pi->status_valid) |
| 1205 | if (!proc_get_status (pi)) |
| 1206 | return 0; |
| 1207 | |
| 1208 | #ifdef NEW_PROC_API |
| 1209 | return pi->prstatus.pr_lwp.pr_nsysarg; |
| 1210 | #else |
| 1211 | return pi->prstatus.pr_nsysarg; |
| 1212 | #endif |
| 1213 | } |
| 1214 | |
| 1215 | /* Returns the pr_sysarg field (pointer to the arguments of current |
| 1216 | syscall). */ |
| 1217 | |
| 1218 | static long * |
| 1219 | proc_sysargs (procinfo *pi) |
| 1220 | { |
| 1221 | if (!pi->status_valid) |
| 1222 | if (!proc_get_status (pi)) |
| 1223 | return NULL; |
| 1224 | |
| 1225 | #ifdef NEW_PROC_API |
| 1226 | return (long *) &pi->prstatus.pr_lwp.pr_sysarg; |
| 1227 | #else |
| 1228 | return (long *) &pi->prstatus.pr_sysarg; |
| 1229 | #endif |
| 1230 | } |
| 1231 | #endif /* PIOCSSPCACT */ |
| 1232 | |
| 1233 | #ifdef PROCFS_DONT_PIOCSSIG_CURSIG |
| 1234 | /* Returns the pr_cursig field (current signal). */ |
| 1235 | |
| 1236 | static long |
| 1237 | proc_cursig (struct procinfo *pi) |
| 1238 | { |
| 1239 | if (!pi->status_valid) |
| 1240 | if (!proc_get_status (pi)) |
| 1241 | return 0; /* FIXME: not a good failure value (but what is?) */ |
| 1242 | |
| 1243 | #ifdef NEW_PROC_API |
| 1244 | return pi->prstatus.pr_lwp.pr_cursig; |
| 1245 | #else |
| 1246 | return pi->prstatus.pr_cursig; |
| 1247 | #endif |
| 1248 | } |
| 1249 | #endif /* PROCFS_DONT_PIOCSSIG_CURSIG */ |
| 1250 | |
| 1251 | /* === I appologize for the messiness of this function. |
| 1252 | === This is an area where the different versions of |
| 1253 | === /proc are more inconsistent than usual. |
| 1254 | |
| 1255 | Set or reset any of the following process flags: |
| 1256 | PR_FORK -- forked child will inherit trace flags |
| 1257 | PR_RLC -- traced process runs when last /proc file closed. |
| 1258 | PR_KLC -- traced process is killed when last /proc file closed. |
| 1259 | PR_ASYNC -- LWP's get to run/stop independently. |
| 1260 | |
| 1261 | There are three methods for doing this function: |
| 1262 | 1) Newest: read/write [PCSET/PCRESET/PCUNSET] |
| 1263 | [Sol6, Sol7, UW] |
| 1264 | 2) Middle: PIOCSET/PIOCRESET |
| 1265 | [Irix, Sol5] |
| 1266 | 3) Oldest: PIOCSFORK/PIOCRFORK/PIOCSRLC/PIOCRRLC |
| 1267 | [OSF, Sol5] |
| 1268 | |
| 1269 | Note: Irix does not define PR_ASYNC. |
| 1270 | Note: OSF does not define PR_KLC. |
| 1271 | Note: OSF is the only one that can ONLY use the oldest method. |
| 1272 | |
| 1273 | Arguments: |
| 1274 | pi -- the procinfo |
| 1275 | flag -- one of PR_FORK, PR_RLC, or PR_ASYNC |
| 1276 | mode -- 1 for set, 0 for reset. |
| 1277 | |
| 1278 | Returns non-zero for success, zero for failure. */ |
| 1279 | |
| 1280 | enum { FLAG_RESET, FLAG_SET }; |
| 1281 | |
| 1282 | static int |
| 1283 | proc_modify_flag (procinfo *pi, long flag, long mode) |
| 1284 | { |
| 1285 | long win = 0; /* default to fail */ |
| 1286 | |
| 1287 | /* These operations affect the process as a whole, and applying them |
| 1288 | to an individual LWP has the same meaning as applying them to the |
| 1289 | main process. Therefore, if we're ever called with a pointer to |
| 1290 | an LWP's procinfo, let's substitute the process's procinfo and |
| 1291 | avoid opening the LWP's file descriptor unnecessarily. */ |
| 1292 | |
| 1293 | if (pi->pid != 0) |
| 1294 | pi = find_procinfo_or_die (pi->pid, 0); |
| 1295 | |
| 1296 | #ifdef NEW_PROC_API /* Newest method: Newer Solarii. */ |
| 1297 | /* First normalize the PCUNSET/PCRESET command opcode |
| 1298 | (which for no obvious reason has a different definition |
| 1299 | from one operating system to the next...) */ |
| 1300 | #ifdef PCUNSET |
| 1301 | #define GDBRESET PCUNSET |
| 1302 | #else |
| 1303 | #ifdef PCRESET |
| 1304 | #define GDBRESET PCRESET |
| 1305 | #endif |
| 1306 | #endif |
| 1307 | { |
| 1308 | procfs_ctl_t arg[2]; |
| 1309 | |
| 1310 | if (mode == FLAG_SET) /* Set the flag (RLC, FORK, or ASYNC). */ |
| 1311 | arg[0] = PCSET; |
| 1312 | else /* Reset the flag. */ |
| 1313 | arg[0] = GDBRESET; |
| 1314 | |
| 1315 | arg[1] = flag; |
| 1316 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); |
| 1317 | } |
| 1318 | #else |
| 1319 | #ifdef PIOCSET /* Irix/Sol5 method */ |
| 1320 | if (mode == FLAG_SET) /* Set the flag (hopefully RLC, FORK, or ASYNC). */ |
| 1321 | { |
| 1322 | win = (ioctl (pi->ctl_fd, PIOCSET, &flag) >= 0); |
| 1323 | } |
| 1324 | else /* Reset the flag. */ |
| 1325 | { |
| 1326 | win = (ioctl (pi->ctl_fd, PIOCRESET, &flag) >= 0); |
| 1327 | } |
| 1328 | |
| 1329 | #else |
| 1330 | #ifdef PIOCSRLC /* Oldest method: OSF */ |
| 1331 | switch (flag) { |
| 1332 | case PR_RLC: |
| 1333 | if (mode == FLAG_SET) /* Set run-on-last-close */ |
| 1334 | { |
| 1335 | win = (ioctl (pi->ctl_fd, PIOCSRLC, NULL) >= 0); |
| 1336 | } |
| 1337 | else /* Clear run-on-last-close */ |
| 1338 | { |
| 1339 | win = (ioctl (pi->ctl_fd, PIOCRRLC, NULL) >= 0); |
| 1340 | } |
| 1341 | break; |
| 1342 | case PR_FORK: |
| 1343 | if (mode == FLAG_SET) /* Set inherit-on-fork */ |
| 1344 | { |
| 1345 | win = (ioctl (pi->ctl_fd, PIOCSFORK, NULL) >= 0); |
| 1346 | } |
| 1347 | else /* Clear inherit-on-fork */ |
| 1348 | { |
| 1349 | win = (ioctl (pi->ctl_fd, PIOCRFORK, NULL) >= 0); |
| 1350 | } |
| 1351 | break; |
| 1352 | default: |
| 1353 | win = 0; /* Fail -- unknown flag (can't do PR_ASYNC). */ |
| 1354 | break; |
| 1355 | } |
| 1356 | #endif |
| 1357 | #endif |
| 1358 | #endif |
| 1359 | #undef GDBRESET |
| 1360 | /* The above operation renders the procinfo's cached pstatus |
| 1361 | obsolete. */ |
| 1362 | pi->status_valid = 0; |
| 1363 | |
| 1364 | if (!win) |
| 1365 | warning (_("procfs: modify_flag failed to turn %s %s"), |
| 1366 | flag == PR_FORK ? "PR_FORK" : |
| 1367 | flag == PR_RLC ? "PR_RLC" : |
| 1368 | #ifdef PR_ASYNC |
| 1369 | flag == PR_ASYNC ? "PR_ASYNC" : |
| 1370 | #endif |
| 1371 | #ifdef PR_KLC |
| 1372 | flag == PR_KLC ? "PR_KLC" : |
| 1373 | #endif |
| 1374 | "<unknown flag>", |
| 1375 | mode == FLAG_RESET ? "off" : "on"); |
| 1376 | |
| 1377 | return win; |
| 1378 | } |
| 1379 | |
| 1380 | /* Set the run_on_last_close flag. Process with all threads will |
| 1381 | become runnable when debugger closes all /proc fds. Returns |
| 1382 | non-zero for success, zero for failure. */ |
| 1383 | |
| 1384 | static int |
| 1385 | proc_set_run_on_last_close (procinfo *pi) |
| 1386 | { |
| 1387 | return proc_modify_flag (pi, PR_RLC, FLAG_SET); |
| 1388 | } |
| 1389 | |
| 1390 | /* Reset the run_on_last_close flag. The process will NOT become |
| 1391 | runnable when debugger closes its file handles. Returns non-zero |
| 1392 | for success, zero for failure. */ |
| 1393 | |
| 1394 | static int |
| 1395 | proc_unset_run_on_last_close (procinfo *pi) |
| 1396 | { |
| 1397 | return proc_modify_flag (pi, PR_RLC, FLAG_RESET); |
| 1398 | } |
| 1399 | |
| 1400 | /* Reset inherit_on_fork flag. If the process forks a child while we |
| 1401 | are registered for events in the parent, then we will NOT recieve |
| 1402 | events from the child. Returns non-zero for success, zero for |
| 1403 | failure. */ |
| 1404 | |
| 1405 | static int |
| 1406 | proc_unset_inherit_on_fork (procinfo *pi) |
| 1407 | { |
| 1408 | return proc_modify_flag (pi, PR_FORK, FLAG_RESET); |
| 1409 | } |
| 1410 | |
| 1411 | #ifdef PR_ASYNC |
| 1412 | /* Set PR_ASYNC flag. If one LWP stops because of a debug event |
| 1413 | (signal etc.), the remaining LWPs will continue to run. Returns |
| 1414 | non-zero for success, zero for failure. */ |
| 1415 | |
| 1416 | static int |
| 1417 | proc_set_async (procinfo *pi) |
| 1418 | { |
| 1419 | return proc_modify_flag (pi, PR_ASYNC, FLAG_SET); |
| 1420 | } |
| 1421 | |
| 1422 | /* Reset PR_ASYNC flag. If one LWP stops because of a debug event |
| 1423 | (signal etc.), then all other LWPs will stop as well. Returns |
| 1424 | non-zero for success, zero for failure. */ |
| 1425 | |
| 1426 | static int |
| 1427 | proc_unset_async (procinfo *pi) |
| 1428 | { |
| 1429 | return proc_modify_flag (pi, PR_ASYNC, FLAG_RESET); |
| 1430 | } |
| 1431 | #endif /* PR_ASYNC */ |
| 1432 | |
| 1433 | /* Request the process/LWP to stop. Does not wait. Returns non-zero |
| 1434 | for success, zero for failure. */ |
| 1435 | |
| 1436 | static int |
| 1437 | proc_stop_process (procinfo *pi) |
| 1438 | { |
| 1439 | int win; |
| 1440 | |
| 1441 | /* We might conceivably apply this operation to an LWP, and the |
| 1442 | LWP's ctl file descriptor might not be open. */ |
| 1443 | |
| 1444 | if (pi->ctl_fd == 0 && |
| 1445 | open_procinfo_files (pi, FD_CTL) == 0) |
| 1446 | return 0; |
| 1447 | else |
| 1448 | { |
| 1449 | #ifdef NEW_PROC_API |
| 1450 | procfs_ctl_t cmd = PCSTOP; |
| 1451 | |
| 1452 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); |
| 1453 | #else /* ioctl method */ |
| 1454 | win = (ioctl (pi->ctl_fd, PIOCSTOP, &pi->prstatus) >= 0); |
| 1455 | /* Note: the call also reads the prstatus. */ |
| 1456 | if (win) |
| 1457 | { |
| 1458 | pi->status_valid = 1; |
| 1459 | PROC_PRETTYFPRINT_STATUS (proc_flags (pi), |
| 1460 | proc_why (pi), |
| 1461 | proc_what (pi), |
| 1462 | proc_get_current_thread (pi)); |
| 1463 | } |
| 1464 | #endif |
| 1465 | } |
| 1466 | |
| 1467 | return win; |
| 1468 | } |
| 1469 | |
| 1470 | /* Wait for the process or LWP to stop (block until it does). Returns |
| 1471 | non-zero for success, zero for failure. */ |
| 1472 | |
| 1473 | static int |
| 1474 | proc_wait_for_stop (procinfo *pi) |
| 1475 | { |
| 1476 | int win; |
| 1477 | |
| 1478 | /* We should never have to apply this operation to any procinfo |
| 1479 | except the one for the main process. If that ever changes for |
| 1480 | any reason, then take out the following clause and replace it |
| 1481 | with one that makes sure the ctl_fd is open. */ |
| 1482 | |
| 1483 | if (pi->tid != 0) |
| 1484 | pi = find_procinfo_or_die (pi->pid, 0); |
| 1485 | |
| 1486 | #ifdef NEW_PROC_API |
| 1487 | { |
| 1488 | procfs_ctl_t cmd = PCWSTOP; |
| 1489 | |
| 1490 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); |
| 1491 | /* We been runnin' and we stopped -- need to update status. */ |
| 1492 | pi->status_valid = 0; |
| 1493 | } |
| 1494 | #else /* ioctl method */ |
| 1495 | win = (ioctl (pi->ctl_fd, PIOCWSTOP, &pi->prstatus) >= 0); |
| 1496 | /* Above call also refreshes the prstatus. */ |
| 1497 | if (win) |
| 1498 | { |
| 1499 | pi->status_valid = 1; |
| 1500 | PROC_PRETTYFPRINT_STATUS (proc_flags (pi), |
| 1501 | proc_why (pi), |
| 1502 | proc_what (pi), |
| 1503 | proc_get_current_thread (pi)); |
| 1504 | } |
| 1505 | #endif |
| 1506 | |
| 1507 | return win; |
| 1508 | } |
| 1509 | |
| 1510 | /* Make the process or LWP runnable. |
| 1511 | |
| 1512 | Options (not all are implemented): |
| 1513 | - single-step |
| 1514 | - clear current fault |
| 1515 | - clear current signal |
| 1516 | - abort the current system call |
| 1517 | - stop as soon as finished with system call |
| 1518 | - (ioctl): set traced signal set |
| 1519 | - (ioctl): set held signal set |
| 1520 | - (ioctl): set traced fault set |
| 1521 | - (ioctl): set start pc (vaddr) |
| 1522 | |
| 1523 | Always clears the current fault. PI is the process or LWP to |
| 1524 | operate on. If STEP is true, set the process or LWP to trap after |
| 1525 | one instruction. If SIGNO is zero, clear the current signal if |
| 1526 | any; if non-zero, set the current signal to this one. Returns |
| 1527 | non-zero for success, zero for failure. */ |
| 1528 | |
| 1529 | static int |
| 1530 | proc_run_process (procinfo *pi, int step, int signo) |
| 1531 | { |
| 1532 | int win; |
| 1533 | int runflags; |
| 1534 | |
| 1535 | /* We will probably have to apply this operation to individual |
| 1536 | threads, so make sure the control file descriptor is open. */ |
| 1537 | |
| 1538 | if (pi->ctl_fd == 0 && |
| 1539 | open_procinfo_files (pi, FD_CTL) == 0) |
| 1540 | { |
| 1541 | return 0; |
| 1542 | } |
| 1543 | |
| 1544 | runflags = PRCFAULT; /* Always clear current fault. */ |
| 1545 | if (step) |
| 1546 | runflags |= PRSTEP; |
| 1547 | if (signo == 0) |
| 1548 | runflags |= PRCSIG; |
| 1549 | else if (signo != -1) /* -1 means do nothing W.R.T. signals. */ |
| 1550 | proc_set_current_signal (pi, signo); |
| 1551 | |
| 1552 | #ifdef NEW_PROC_API |
| 1553 | { |
| 1554 | procfs_ctl_t cmd[2]; |
| 1555 | |
| 1556 | cmd[0] = PCRUN; |
| 1557 | cmd[1] = runflags; |
| 1558 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); |
| 1559 | } |
| 1560 | #else /* ioctl method */ |
| 1561 | { |
| 1562 | prrun_t prrun; |
| 1563 | |
| 1564 | memset (&prrun, 0, sizeof (prrun)); |
| 1565 | prrun.pr_flags = runflags; |
| 1566 | win = (ioctl (pi->ctl_fd, PIOCRUN, &prrun) >= 0); |
| 1567 | } |
| 1568 | #endif |
| 1569 | |
| 1570 | return win; |
| 1571 | } |
| 1572 | |
| 1573 | /* Register to trace signals in the process or LWP. Returns non-zero |
| 1574 | for success, zero for failure. */ |
| 1575 | |
| 1576 | static int |
| 1577 | proc_set_traced_signals (procinfo *pi, gdb_sigset_t *sigset) |
| 1578 | { |
| 1579 | int win; |
| 1580 | |
| 1581 | /* We should never have to apply this operation to any procinfo |
| 1582 | except the one for the main process. If that ever changes for |
| 1583 | any reason, then take out the following clause and replace it |
| 1584 | with one that makes sure the ctl_fd is open. */ |
| 1585 | |
| 1586 | if (pi->tid != 0) |
| 1587 | pi = find_procinfo_or_die (pi->pid, 0); |
| 1588 | |
| 1589 | #ifdef NEW_PROC_API |
| 1590 | { |
| 1591 | struct { |
| 1592 | procfs_ctl_t cmd; |
| 1593 | /* Use char array to avoid alignment issues. */ |
| 1594 | char sigset[sizeof (gdb_sigset_t)]; |
| 1595 | } arg; |
| 1596 | |
| 1597 | arg.cmd = PCSTRACE; |
| 1598 | memcpy (&arg.sigset, sigset, sizeof (gdb_sigset_t)); |
| 1599 | |
| 1600 | win = (write (pi->ctl_fd, (char *) &arg, sizeof (arg)) == sizeof (arg)); |
| 1601 | } |
| 1602 | #else /* ioctl method */ |
| 1603 | win = (ioctl (pi->ctl_fd, PIOCSTRACE, sigset) >= 0); |
| 1604 | #endif |
| 1605 | /* The above operation renders the procinfo's cached pstatus obsolete. */ |
| 1606 | pi->status_valid = 0; |
| 1607 | |
| 1608 | if (!win) |
| 1609 | warning (_("procfs: set_traced_signals failed")); |
| 1610 | return win; |
| 1611 | } |
| 1612 | |
| 1613 | /* Register to trace hardware faults in the process or LWP. Returns |
| 1614 | non-zero for success, zero for failure. */ |
| 1615 | |
| 1616 | static int |
| 1617 | proc_set_traced_faults (procinfo *pi, fltset_t *fltset) |
| 1618 | { |
| 1619 | int win; |
| 1620 | |
| 1621 | /* We should never have to apply this operation to any procinfo |
| 1622 | except the one for the main process. If that ever changes for |
| 1623 | any reason, then take out the following clause and replace it |
| 1624 | with one that makes sure the ctl_fd is open. */ |
| 1625 | |
| 1626 | if (pi->tid != 0) |
| 1627 | pi = find_procinfo_or_die (pi->pid, 0); |
| 1628 | |
| 1629 | #ifdef NEW_PROC_API |
| 1630 | { |
| 1631 | struct { |
| 1632 | procfs_ctl_t cmd; |
| 1633 | /* Use char array to avoid alignment issues. */ |
| 1634 | char fltset[sizeof (fltset_t)]; |
| 1635 | } arg; |
| 1636 | |
| 1637 | arg.cmd = PCSFAULT; |
| 1638 | memcpy (&arg.fltset, fltset, sizeof (fltset_t)); |
| 1639 | |
| 1640 | win = (write (pi->ctl_fd, (char *) &arg, sizeof (arg)) == sizeof (arg)); |
| 1641 | } |
| 1642 | #else /* ioctl method */ |
| 1643 | win = (ioctl (pi->ctl_fd, PIOCSFAULT, fltset) >= 0); |
| 1644 | #endif |
| 1645 | /* The above operation renders the procinfo's cached pstatus obsolete. */ |
| 1646 | pi->status_valid = 0; |
| 1647 | |
| 1648 | return win; |
| 1649 | } |
| 1650 | |
| 1651 | /* Register to trace entry to system calls in the process or LWP. |
| 1652 | Returns non-zero for success, zero for failure. */ |
| 1653 | |
| 1654 | static int |
| 1655 | proc_set_traced_sysentry (procinfo *pi, sysset_t *sysset) |
| 1656 | { |
| 1657 | int win; |
| 1658 | |
| 1659 | /* We should never have to apply this operation to any procinfo |
| 1660 | except the one for the main process. If that ever changes for |
| 1661 | any reason, then take out the following clause and replace it |
| 1662 | with one that makes sure the ctl_fd is open. */ |
| 1663 | |
| 1664 | if (pi->tid != 0) |
| 1665 | pi = find_procinfo_or_die (pi->pid, 0); |
| 1666 | |
| 1667 | #ifdef NEW_PROC_API |
| 1668 | { |
| 1669 | struct gdb_proc_ctl_pcsentry { |
| 1670 | procfs_ctl_t cmd; |
| 1671 | /* Use char array to avoid alignment issues. */ |
| 1672 | char sysset[sizeof (sysset_t)]; |
| 1673 | } *argp; |
| 1674 | int argp_size = sizeof (struct gdb_proc_ctl_pcsentry) |
| 1675 | - sizeof (sysset_t) |
| 1676 | + sysset_t_size (pi); |
| 1677 | |
| 1678 | argp = xmalloc (argp_size); |
| 1679 | |
| 1680 | argp->cmd = PCSENTRY; |
| 1681 | memcpy (&argp->sysset, sysset, sysset_t_size (pi)); |
| 1682 | |
| 1683 | win = (write (pi->ctl_fd, (char *) argp, argp_size) == argp_size); |
| 1684 | xfree (argp); |
| 1685 | } |
| 1686 | #else /* ioctl method */ |
| 1687 | win = (ioctl (pi->ctl_fd, PIOCSENTRY, sysset) >= 0); |
| 1688 | #endif |
| 1689 | /* The above operation renders the procinfo's cached pstatus |
| 1690 | obsolete. */ |
| 1691 | pi->status_valid = 0; |
| 1692 | |
| 1693 | return win; |
| 1694 | } |
| 1695 | |
| 1696 | /* Register to trace exit from system calls in the process or LWP. |
| 1697 | Returns non-zero for success, zero for failure. */ |
| 1698 | |
| 1699 | static int |
| 1700 | proc_set_traced_sysexit (procinfo *pi, sysset_t *sysset) |
| 1701 | { |
| 1702 | int win; |
| 1703 | |
| 1704 | /* We should never have to apply this operation to any procinfo |
| 1705 | except the one for the main process. If that ever changes for |
| 1706 | any reason, then take out the following clause and replace it |
| 1707 | with one that makes sure the ctl_fd is open. */ |
| 1708 | |
| 1709 | if (pi->tid != 0) |
| 1710 | pi = find_procinfo_or_die (pi->pid, 0); |
| 1711 | |
| 1712 | #ifdef NEW_PROC_API |
| 1713 | { |
| 1714 | struct gdb_proc_ctl_pcsexit { |
| 1715 | procfs_ctl_t cmd; |
| 1716 | /* Use char array to avoid alignment issues. */ |
| 1717 | char sysset[sizeof (sysset_t)]; |
| 1718 | } *argp; |
| 1719 | int argp_size = sizeof (struct gdb_proc_ctl_pcsexit) |
| 1720 | - sizeof (sysset_t) |
| 1721 | + sysset_t_size (pi); |
| 1722 | |
| 1723 | argp = xmalloc (argp_size); |
| 1724 | |
| 1725 | argp->cmd = PCSEXIT; |
| 1726 | memcpy (&argp->sysset, sysset, sysset_t_size (pi)); |
| 1727 | |
| 1728 | win = (write (pi->ctl_fd, (char *) argp, argp_size) == argp_size); |
| 1729 | xfree (argp); |
| 1730 | } |
| 1731 | #else /* ioctl method */ |
| 1732 | win = (ioctl (pi->ctl_fd, PIOCSEXIT, sysset) >= 0); |
| 1733 | #endif |
| 1734 | /* The above operation renders the procinfo's cached pstatus |
| 1735 | obsolete. */ |
| 1736 | pi->status_valid = 0; |
| 1737 | |
| 1738 | return win; |
| 1739 | } |
| 1740 | |
| 1741 | /* Specify the set of blocked / held signals in the process or LWP. |
| 1742 | Returns non-zero for success, zero for failure. */ |
| 1743 | |
| 1744 | static int |
| 1745 | proc_set_held_signals (procinfo *pi, gdb_sigset_t *sighold) |
| 1746 | { |
| 1747 | int win; |
| 1748 | |
| 1749 | /* We should never have to apply this operation to any procinfo |
| 1750 | except the one for the main process. If that ever changes for |
| 1751 | any reason, then take out the following clause and replace it |
| 1752 | with one that makes sure the ctl_fd is open. */ |
| 1753 | |
| 1754 | if (pi->tid != 0) |
| 1755 | pi = find_procinfo_or_die (pi->pid, 0); |
| 1756 | |
| 1757 | #ifdef NEW_PROC_API |
| 1758 | { |
| 1759 | struct { |
| 1760 | procfs_ctl_t cmd; |
| 1761 | /* Use char array to avoid alignment issues. */ |
| 1762 | char hold[sizeof (gdb_sigset_t)]; |
| 1763 | } arg; |
| 1764 | |
| 1765 | arg.cmd = PCSHOLD; |
| 1766 | memcpy (&arg.hold, sighold, sizeof (gdb_sigset_t)); |
| 1767 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); |
| 1768 | } |
| 1769 | #else |
| 1770 | win = (ioctl (pi->ctl_fd, PIOCSHOLD, sighold) >= 0); |
| 1771 | #endif |
| 1772 | /* The above operation renders the procinfo's cached pstatus |
| 1773 | obsolete. */ |
| 1774 | pi->status_valid = 0; |
| 1775 | |
| 1776 | return win; |
| 1777 | } |
| 1778 | |
| 1779 | /* Returns the set of signals that are held / blocked. Will also copy |
| 1780 | the sigset if SAVE is non-zero. */ |
| 1781 | |
| 1782 | static gdb_sigset_t * |
| 1783 | proc_get_held_signals (procinfo *pi, gdb_sigset_t *save) |
| 1784 | { |
| 1785 | gdb_sigset_t *ret = NULL; |
| 1786 | |
| 1787 | /* We should never have to apply this operation to any procinfo |
| 1788 | except the one for the main process. If that ever changes for |
| 1789 | any reason, then take out the following clause and replace it |
| 1790 | with one that makes sure the ctl_fd is open. */ |
| 1791 | |
| 1792 | if (pi->tid != 0) |
| 1793 | pi = find_procinfo_or_die (pi->pid, 0); |
| 1794 | |
| 1795 | #ifdef NEW_PROC_API |
| 1796 | if (!pi->status_valid) |
| 1797 | if (!proc_get_status (pi)) |
| 1798 | return NULL; |
| 1799 | |
| 1800 | ret = &pi->prstatus.pr_lwp.pr_lwphold; |
| 1801 | #else /* not NEW_PROC_API */ |
| 1802 | { |
| 1803 | static gdb_sigset_t sigheld; |
| 1804 | |
| 1805 | if (ioctl (pi->ctl_fd, PIOCGHOLD, &sigheld) >= 0) |
| 1806 | ret = &sigheld; |
| 1807 | } |
| 1808 | #endif /* NEW_PROC_API */ |
| 1809 | if (save && ret) |
| 1810 | memcpy (save, ret, sizeof (gdb_sigset_t)); |
| 1811 | |
| 1812 | return ret; |
| 1813 | } |
| 1814 | |
| 1815 | /* Returns the set of signals that are traced / debugged. Will also |
| 1816 | copy the sigset if SAVE is non-zero. */ |
| 1817 | |
| 1818 | static gdb_sigset_t * |
| 1819 | proc_get_traced_signals (procinfo *pi, gdb_sigset_t *save) |
| 1820 | { |
| 1821 | gdb_sigset_t *ret = NULL; |
| 1822 | |
| 1823 | /* We should never have to apply this operation to any procinfo |
| 1824 | except the one for the main process. If that ever changes for |
| 1825 | any reason, then take out the following clause and replace it |
| 1826 | with one that makes sure the ctl_fd is open. */ |
| 1827 | |
| 1828 | if (pi->tid != 0) |
| 1829 | pi = find_procinfo_or_die (pi->pid, 0); |
| 1830 | |
| 1831 | #ifdef NEW_PROC_API |
| 1832 | if (!pi->status_valid) |
| 1833 | if (!proc_get_status (pi)) |
| 1834 | return NULL; |
| 1835 | |
| 1836 | ret = &pi->prstatus.pr_sigtrace; |
| 1837 | #else |
| 1838 | { |
| 1839 | static gdb_sigset_t sigtrace; |
| 1840 | |
| 1841 | if (ioctl (pi->ctl_fd, PIOCGTRACE, &sigtrace) >= 0) |
| 1842 | ret = &sigtrace; |
| 1843 | } |
| 1844 | #endif |
| 1845 | if (save && ret) |
| 1846 | memcpy (save, ret, sizeof (gdb_sigset_t)); |
| 1847 | |
| 1848 | return ret; |
| 1849 | } |
| 1850 | |
| 1851 | /* Returns the set of hardware faults that are traced /debugged. Will |
| 1852 | also copy the faultset if SAVE is non-zero. */ |
| 1853 | |
| 1854 | static fltset_t * |
| 1855 | proc_get_traced_faults (procinfo *pi, fltset_t *save) |
| 1856 | { |
| 1857 | fltset_t *ret = NULL; |
| 1858 | |
| 1859 | /* We should never have to apply this operation to any procinfo |
| 1860 | except the one for the main process. If that ever changes for |
| 1861 | any reason, then take out the following clause and replace it |
| 1862 | with one that makes sure the ctl_fd is open. */ |
| 1863 | |
| 1864 | if (pi->tid != 0) |
| 1865 | pi = find_procinfo_or_die (pi->pid, 0); |
| 1866 | |
| 1867 | #ifdef NEW_PROC_API |
| 1868 | if (!pi->status_valid) |
| 1869 | if (!proc_get_status (pi)) |
| 1870 | return NULL; |
| 1871 | |
| 1872 | ret = &pi->prstatus.pr_flttrace; |
| 1873 | #else |
| 1874 | { |
| 1875 | static fltset_t flttrace; |
| 1876 | |
| 1877 | if (ioctl (pi->ctl_fd, PIOCGFAULT, &flttrace) >= 0) |
| 1878 | ret = &flttrace; |
| 1879 | } |
| 1880 | #endif |
| 1881 | if (save && ret) |
| 1882 | memcpy (save, ret, sizeof (fltset_t)); |
| 1883 | |
| 1884 | return ret; |
| 1885 | } |
| 1886 | |
| 1887 | /* Returns the set of syscalls that are traced /debugged on entry. |
| 1888 | Will also copy the syscall set if SAVE is non-zero. */ |
| 1889 | |
| 1890 | static sysset_t * |
| 1891 | proc_get_traced_sysentry (procinfo *pi, sysset_t *save) |
| 1892 | { |
| 1893 | sysset_t *ret = NULL; |
| 1894 | |
| 1895 | /* We should never have to apply this operation to any procinfo |
| 1896 | except the one for the main process. If that ever changes for |
| 1897 | any reason, then take out the following clause and replace it |
| 1898 | with one that makes sure the ctl_fd is open. */ |
| 1899 | |
| 1900 | if (pi->tid != 0) |
| 1901 | pi = find_procinfo_or_die (pi->pid, 0); |
| 1902 | |
| 1903 | #ifdef NEW_PROC_API |
| 1904 | if (!pi->status_valid) |
| 1905 | if (!proc_get_status (pi)) |
| 1906 | return NULL; |
| 1907 | |
| 1908 | #ifndef DYNAMIC_SYSCALLS |
| 1909 | ret = &pi->prstatus.pr_sysentry; |
| 1910 | #else /* DYNAMIC_SYSCALLS */ |
| 1911 | { |
| 1912 | static sysset_t *sysentry; |
| 1913 | size_t size; |
| 1914 | |
| 1915 | if (!sysentry) |
| 1916 | sysentry = sysset_t_alloc (pi); |
| 1917 | ret = sysentry; |
| 1918 | if (pi->status_fd == 0 && open_procinfo_files (pi, FD_STATUS) == 0) |
| 1919 | return NULL; |
| 1920 | if (pi->prstatus.pr_sysentry_offset == 0) |
| 1921 | { |
| 1922 | gdb_premptysysset (sysentry); |
| 1923 | } |
| 1924 | else |
| 1925 | { |
| 1926 | int rsize; |
| 1927 | |
| 1928 | if (lseek (pi->status_fd, (off_t) pi->prstatus.pr_sysentry_offset, |
| 1929 | SEEK_SET) |
| 1930 | != (off_t) pi->prstatus.pr_sysentry_offset) |
| 1931 | return NULL; |
| 1932 | size = sysset_t_size (pi); |
| 1933 | gdb_premptysysset (sysentry); |
| 1934 | rsize = read (pi->status_fd, sysentry, size); |
| 1935 | if (rsize < 0) |
| 1936 | return NULL; |
| 1937 | } |
| 1938 | } |
| 1939 | #endif /* DYNAMIC_SYSCALLS */ |
| 1940 | #else /* !NEW_PROC_API */ |
| 1941 | { |
| 1942 | static sysset_t sysentry; |
| 1943 | |
| 1944 | if (ioctl (pi->ctl_fd, PIOCGENTRY, &sysentry) >= 0) |
| 1945 | ret = &sysentry; |
| 1946 | } |
| 1947 | #endif /* NEW_PROC_API */ |
| 1948 | if (save && ret) |
| 1949 | memcpy (save, ret, sysset_t_size (pi)); |
| 1950 | |
| 1951 | return ret; |
| 1952 | } |
| 1953 | |
| 1954 | /* Returns the set of syscalls that are traced /debugged on exit. |
| 1955 | Will also copy the syscall set if SAVE is non-zero. */ |
| 1956 | |
| 1957 | static sysset_t * |
| 1958 | proc_get_traced_sysexit (procinfo *pi, sysset_t *save) |
| 1959 | { |
| 1960 | sysset_t * ret = NULL; |
| 1961 | |
| 1962 | /* We should never have to apply this operation to any procinfo |
| 1963 | except the one for the main process. If that ever changes for |
| 1964 | any reason, then take out the following clause and replace it |
| 1965 | with one that makes sure the ctl_fd is open. */ |
| 1966 | |
| 1967 | if (pi->tid != 0) |
| 1968 | pi = find_procinfo_or_die (pi->pid, 0); |
| 1969 | |
| 1970 | #ifdef NEW_PROC_API |
| 1971 | if (!pi->status_valid) |
| 1972 | if (!proc_get_status (pi)) |
| 1973 | return NULL; |
| 1974 | |
| 1975 | #ifndef DYNAMIC_SYSCALLS |
| 1976 | ret = &pi->prstatus.pr_sysexit; |
| 1977 | #else /* DYNAMIC_SYSCALLS */ |
| 1978 | { |
| 1979 | static sysset_t *sysexit; |
| 1980 | size_t size; |
| 1981 | |
| 1982 | if (!sysexit) |
| 1983 | sysexit = sysset_t_alloc (pi); |
| 1984 | ret = sysexit; |
| 1985 | if (pi->status_fd == 0 && open_procinfo_files (pi, FD_STATUS) == 0) |
| 1986 | return NULL; |
| 1987 | if (pi->prstatus.pr_sysexit_offset == 0) |
| 1988 | { |
| 1989 | gdb_premptysysset (sysexit); |
| 1990 | } |
| 1991 | else |
| 1992 | { |
| 1993 | int rsize; |
| 1994 | |
| 1995 | if (lseek (pi->status_fd, (off_t) pi->prstatus.pr_sysexit_offset, |
| 1996 | SEEK_SET) |
| 1997 | != (off_t) pi->prstatus.pr_sysexit_offset) |
| 1998 | return NULL; |
| 1999 | size = sysset_t_size (pi); |
| 2000 | gdb_premptysysset (sysexit); |
| 2001 | rsize = read (pi->status_fd, sysexit, size); |
| 2002 | if (rsize < 0) |
| 2003 | return NULL; |
| 2004 | } |
| 2005 | } |
| 2006 | #endif /* DYNAMIC_SYSCALLS */ |
| 2007 | #else |
| 2008 | { |
| 2009 | static sysset_t sysexit; |
| 2010 | |
| 2011 | if (ioctl (pi->ctl_fd, PIOCGEXIT, &sysexit) >= 0) |
| 2012 | ret = &sysexit; |
| 2013 | } |
| 2014 | #endif |
| 2015 | if (save && ret) |
| 2016 | memcpy (save, ret, sysset_t_size (pi)); |
| 2017 | |
| 2018 | return ret; |
| 2019 | } |
| 2020 | |
| 2021 | /* The current fault (if any) is cleared; the associated signal will |
| 2022 | not be sent to the process or LWP when it resumes. Returns |
| 2023 | non-zero for success, zero for failure. */ |
| 2024 | |
| 2025 | static int |
| 2026 | proc_clear_current_fault (procinfo *pi) |
| 2027 | { |
| 2028 | int win; |
| 2029 | |
| 2030 | /* We should never have to apply this operation to any procinfo |
| 2031 | except the one for the main process. If that ever changes for |
| 2032 | any reason, then take out the following clause and replace it |
| 2033 | with one that makes sure the ctl_fd is open. */ |
| 2034 | |
| 2035 | if (pi->tid != 0) |
| 2036 | pi = find_procinfo_or_die (pi->pid, 0); |
| 2037 | |
| 2038 | #ifdef NEW_PROC_API |
| 2039 | { |
| 2040 | procfs_ctl_t cmd = PCCFAULT; |
| 2041 | |
| 2042 | win = (write (pi->ctl_fd, (void *) &cmd, sizeof (cmd)) == sizeof (cmd)); |
| 2043 | } |
| 2044 | #else |
| 2045 | win = (ioctl (pi->ctl_fd, PIOCCFAULT, 0) >= 0); |
| 2046 | #endif |
| 2047 | |
| 2048 | return win; |
| 2049 | } |
| 2050 | |
| 2051 | /* Set the "current signal" that will be delivered next to the |
| 2052 | process. NOTE: semantics are different from those of KILL. This |
| 2053 | signal will be delivered to the process or LWP immediately when it |
| 2054 | is resumed (even if the signal is held/blocked); it will NOT |
| 2055 | immediately cause another event of interest, and will NOT first |
| 2056 | trap back to the debugger. Returns non-zero for success, zero for |
| 2057 | failure. */ |
| 2058 | |
| 2059 | static int |
| 2060 | proc_set_current_signal (procinfo *pi, int signo) |
| 2061 | { |
| 2062 | int win; |
| 2063 | struct { |
| 2064 | procfs_ctl_t cmd; |
| 2065 | /* Use char array to avoid alignment issues. */ |
| 2066 | char sinfo[sizeof (gdb_siginfo_t)]; |
| 2067 | } arg; |
| 2068 | gdb_siginfo_t mysinfo; |
| 2069 | ptid_t wait_ptid; |
| 2070 | struct target_waitstatus wait_status; |
| 2071 | |
| 2072 | /* We should never have to apply this operation to any procinfo |
| 2073 | except the one for the main process. If that ever changes for |
| 2074 | any reason, then take out the following clause and replace it |
| 2075 | with one that makes sure the ctl_fd is open. */ |
| 2076 | |
| 2077 | if (pi->tid != 0) |
| 2078 | pi = find_procinfo_or_die (pi->pid, 0); |
| 2079 | |
| 2080 | #ifdef PROCFS_DONT_PIOCSSIG_CURSIG |
| 2081 | /* With Alpha OSF/1 procfs, the kernel gets really confused if it |
| 2082 | receives a PIOCSSIG with a signal identical to the current |
| 2083 | signal, it messes up the current signal. Work around the kernel |
| 2084 | bug. */ |
| 2085 | if (signo > 0 && |
| 2086 | signo == proc_cursig (pi)) |
| 2087 | return 1; /* I assume this is a success? */ |
| 2088 | #endif |
| 2089 | |
| 2090 | /* The pointer is just a type alias. */ |
| 2091 | get_last_target_status (&wait_ptid, &wait_status); |
| 2092 | if (ptid_equal (wait_ptid, inferior_ptid) |
| 2093 | && wait_status.kind == TARGET_WAITKIND_STOPPED |
| 2094 | && wait_status.value.sig == gdb_signal_from_host (signo) |
| 2095 | && proc_get_status (pi) |
| 2096 | #ifdef NEW_PROC_API |
| 2097 | && pi->prstatus.pr_lwp.pr_info.si_signo == signo |
| 2098 | #else |
| 2099 | && pi->prstatus.pr_info.si_signo == signo |
| 2100 | #endif |
| 2101 | ) |
| 2102 | /* Use the siginfo associated with the signal being |
| 2103 | redelivered. */ |
| 2104 | #ifdef NEW_PROC_API |
| 2105 | memcpy (arg.sinfo, &pi->prstatus.pr_lwp.pr_info, sizeof (gdb_siginfo_t)); |
| 2106 | #else |
| 2107 | memcpy (arg.sinfo, &pi->prstatus.pr_info, sizeof (gdb_siginfo_t)); |
| 2108 | #endif |
| 2109 | else |
| 2110 | { |
| 2111 | mysinfo.si_signo = signo; |
| 2112 | mysinfo.si_code = 0; |
| 2113 | mysinfo.si_pid = getpid (); /* ?why? */ |
| 2114 | mysinfo.si_uid = getuid (); /* ?why? */ |
| 2115 | memcpy (arg.sinfo, &mysinfo, sizeof (gdb_siginfo_t)); |
| 2116 | } |
| 2117 | |
| 2118 | #ifdef NEW_PROC_API |
| 2119 | arg.cmd = PCSSIG; |
| 2120 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); |
| 2121 | #else |
| 2122 | win = (ioctl (pi->ctl_fd, PIOCSSIG, (void *) &arg.sinfo) >= 0); |
| 2123 | #endif |
| 2124 | |
| 2125 | return win; |
| 2126 | } |
| 2127 | |
| 2128 | /* The current signal (if any) is cleared, and is not sent to the |
| 2129 | process or LWP when it resumes. Returns non-zero for success, zero |
| 2130 | for failure. */ |
| 2131 | |
| 2132 | static int |
| 2133 | proc_clear_current_signal (procinfo *pi) |
| 2134 | { |
| 2135 | int win; |
| 2136 | |
| 2137 | /* We should never have to apply this operation to any procinfo |
| 2138 | except the one for the main process. If that ever changes for |
| 2139 | any reason, then take out the following clause and replace it |
| 2140 | with one that makes sure the ctl_fd is open. */ |
| 2141 | |
| 2142 | if (pi->tid != 0) |
| 2143 | pi = find_procinfo_or_die (pi->pid, 0); |
| 2144 | |
| 2145 | #ifdef NEW_PROC_API |
| 2146 | { |
| 2147 | struct { |
| 2148 | procfs_ctl_t cmd; |
| 2149 | /* Use char array to avoid alignment issues. */ |
| 2150 | char sinfo[sizeof (gdb_siginfo_t)]; |
| 2151 | } arg; |
| 2152 | gdb_siginfo_t mysinfo; |
| 2153 | |
| 2154 | arg.cmd = PCSSIG; |
| 2155 | /* The pointer is just a type alias. */ |
| 2156 | mysinfo.si_signo = 0; |
| 2157 | mysinfo.si_code = 0; |
| 2158 | mysinfo.si_errno = 0; |
| 2159 | mysinfo.si_pid = getpid (); /* ?why? */ |
| 2160 | mysinfo.si_uid = getuid (); /* ?why? */ |
| 2161 | memcpy (arg.sinfo, &mysinfo, sizeof (gdb_siginfo_t)); |
| 2162 | |
| 2163 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); |
| 2164 | } |
| 2165 | #else |
| 2166 | win = (ioctl (pi->ctl_fd, PIOCSSIG, 0) >= 0); |
| 2167 | #endif |
| 2168 | |
| 2169 | return win; |
| 2170 | } |
| 2171 | |
| 2172 | /* Return the general-purpose registers for the process or LWP |
| 2173 | corresponding to PI. Upon failure, return NULL. */ |
| 2174 | |
| 2175 | static gdb_gregset_t * |
| 2176 | proc_get_gregs (procinfo *pi) |
| 2177 | { |
| 2178 | if (!pi->status_valid || !pi->gregs_valid) |
| 2179 | if (!proc_get_status (pi)) |
| 2180 | return NULL; |
| 2181 | |
| 2182 | #ifdef NEW_PROC_API |
| 2183 | return &pi->prstatus.pr_lwp.pr_reg; |
| 2184 | #else |
| 2185 | return &pi->prstatus.pr_reg; |
| 2186 | #endif |
| 2187 | } |
| 2188 | |
| 2189 | /* Return the general-purpose registers for the process or LWP |
| 2190 | corresponding to PI. Upon failure, return NULL. */ |
| 2191 | |
| 2192 | static gdb_fpregset_t * |
| 2193 | proc_get_fpregs (procinfo *pi) |
| 2194 | { |
| 2195 | #ifdef NEW_PROC_API |
| 2196 | if (!pi->status_valid || !pi->fpregs_valid) |
| 2197 | if (!proc_get_status (pi)) |
| 2198 | return NULL; |
| 2199 | |
| 2200 | return &pi->prstatus.pr_lwp.pr_fpreg; |
| 2201 | |
| 2202 | #else /* not NEW_PROC_API */ |
| 2203 | if (pi->fpregs_valid) |
| 2204 | return &pi->fpregset; /* Already got 'em. */ |
| 2205 | else |
| 2206 | { |
| 2207 | if (pi->ctl_fd == 0 && open_procinfo_files (pi, FD_CTL) == 0) |
| 2208 | { |
| 2209 | return NULL; |
| 2210 | } |
| 2211 | else |
| 2212 | { |
| 2213 | # ifdef PIOCTGFPREG |
| 2214 | struct { |
| 2215 | long pr_count; |
| 2216 | tid_t pr_error_thread; |
| 2217 | tfpregset_t thread_1; |
| 2218 | } thread_fpregs; |
| 2219 | |
| 2220 | thread_fpregs.pr_count = 1; |
| 2221 | thread_fpregs.thread_1.tid = pi->tid; |
| 2222 | |
| 2223 | if (pi->tid == 0 |
| 2224 | && ioctl (pi->ctl_fd, PIOCGFPREG, &pi->fpregset) >= 0) |
| 2225 | { |
| 2226 | pi->fpregs_valid = 1; |
| 2227 | return &pi->fpregset; /* Got 'em now! */ |
| 2228 | } |
| 2229 | else if (pi->tid != 0 |
| 2230 | && ioctl (pi->ctl_fd, PIOCTGFPREG, &thread_fpregs) >= 0) |
| 2231 | { |
| 2232 | memcpy (&pi->fpregset, &thread_fpregs.thread_1.pr_fpregs, |
| 2233 | sizeof (pi->fpregset)); |
| 2234 | pi->fpregs_valid = 1; |
| 2235 | return &pi->fpregset; /* Got 'em now! */ |
| 2236 | } |
| 2237 | else |
| 2238 | { |
| 2239 | return NULL; |
| 2240 | } |
| 2241 | # else |
| 2242 | if (ioctl (pi->ctl_fd, PIOCGFPREG, &pi->fpregset) >= 0) |
| 2243 | { |
| 2244 | pi->fpregs_valid = 1; |
| 2245 | return &pi->fpregset; /* Got 'em now! */ |
| 2246 | } |
| 2247 | else |
| 2248 | { |
| 2249 | return NULL; |
| 2250 | } |
| 2251 | # endif |
| 2252 | } |
| 2253 | } |
| 2254 | #endif /* NEW_PROC_API */ |
| 2255 | } |
| 2256 | |
| 2257 | /* Write the general-purpose registers back to the process or LWP |
| 2258 | corresponding to PI. Return non-zero for success, zero for |
| 2259 | failure. */ |
| 2260 | |
| 2261 | static int |
| 2262 | proc_set_gregs (procinfo *pi) |
| 2263 | { |
| 2264 | gdb_gregset_t *gregs; |
| 2265 | int win; |
| 2266 | |
| 2267 | gregs = proc_get_gregs (pi); |
| 2268 | if (gregs == NULL) |
| 2269 | return 0; /* proc_get_regs has already warned. */ |
| 2270 | |
| 2271 | if (pi->ctl_fd == 0 && open_procinfo_files (pi, FD_CTL) == 0) |
| 2272 | { |
| 2273 | return 0; |
| 2274 | } |
| 2275 | else |
| 2276 | { |
| 2277 | #ifdef NEW_PROC_API |
| 2278 | struct { |
| 2279 | procfs_ctl_t cmd; |
| 2280 | /* Use char array to avoid alignment issues. */ |
| 2281 | char gregs[sizeof (gdb_gregset_t)]; |
| 2282 | } arg; |
| 2283 | |
| 2284 | arg.cmd = PCSREG; |
| 2285 | memcpy (&arg.gregs, gregs, sizeof (arg.gregs)); |
| 2286 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); |
| 2287 | #else |
| 2288 | win = (ioctl (pi->ctl_fd, PIOCSREG, gregs) >= 0); |
| 2289 | #endif |
| 2290 | } |
| 2291 | |
| 2292 | /* Policy: writing the registers invalidates our cache. */ |
| 2293 | pi->gregs_valid = 0; |
| 2294 | return win; |
| 2295 | } |
| 2296 | |
| 2297 | /* Write the floating-pointer registers back to the process or LWP |
| 2298 | corresponding to PI. Return non-zero for success, zero for |
| 2299 | failure. */ |
| 2300 | |
| 2301 | static int |
| 2302 | proc_set_fpregs (procinfo *pi) |
| 2303 | { |
| 2304 | gdb_fpregset_t *fpregs; |
| 2305 | int win; |
| 2306 | |
| 2307 | fpregs = proc_get_fpregs (pi); |
| 2308 | if (fpregs == NULL) |
| 2309 | return 0; /* proc_get_fpregs has already warned. */ |
| 2310 | |
| 2311 | if (pi->ctl_fd == 0 && open_procinfo_files (pi, FD_CTL) == 0) |
| 2312 | { |
| 2313 | return 0; |
| 2314 | } |
| 2315 | else |
| 2316 | { |
| 2317 | #ifdef NEW_PROC_API |
| 2318 | struct { |
| 2319 | procfs_ctl_t cmd; |
| 2320 | /* Use char array to avoid alignment issues. */ |
| 2321 | char fpregs[sizeof (gdb_fpregset_t)]; |
| 2322 | } arg; |
| 2323 | |
| 2324 | arg.cmd = PCSFPREG; |
| 2325 | memcpy (&arg.fpregs, fpregs, sizeof (arg.fpregs)); |
| 2326 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); |
| 2327 | #else |
| 2328 | # ifdef PIOCTSFPREG |
| 2329 | if (pi->tid == 0) |
| 2330 | win = (ioctl (pi->ctl_fd, PIOCSFPREG, fpregs) >= 0); |
| 2331 | else |
| 2332 | { |
| 2333 | struct { |
| 2334 | long pr_count; |
| 2335 | tid_t pr_error_thread; |
| 2336 | tfpregset_t thread_1; |
| 2337 | } thread_fpregs; |
| 2338 | |
| 2339 | thread_fpregs.pr_count = 1; |
| 2340 | thread_fpregs.thread_1.tid = pi->tid; |
| 2341 | memcpy (&thread_fpregs.thread_1.pr_fpregs, fpregs, |
| 2342 | sizeof (*fpregs)); |
| 2343 | win = (ioctl (pi->ctl_fd, PIOCTSFPREG, &thread_fpregs) >= 0); |
| 2344 | } |
| 2345 | # else |
| 2346 | win = (ioctl (pi->ctl_fd, PIOCSFPREG, fpregs) >= 0); |
| 2347 | # endif |
| 2348 | #endif /* NEW_PROC_API */ |
| 2349 | } |
| 2350 | |
| 2351 | /* Policy: writing the registers invalidates our cache. */ |
| 2352 | pi->fpregs_valid = 0; |
| 2353 | return win; |
| 2354 | } |
| 2355 | |
| 2356 | /* Send a signal to the proc or lwp with the semantics of "kill()". |
| 2357 | Returns non-zero for success, zero for failure. */ |
| 2358 | |
| 2359 | static int |
| 2360 | proc_kill (procinfo *pi, int signo) |
| 2361 | { |
| 2362 | int win; |
| 2363 | |
| 2364 | /* We might conceivably apply this operation to an LWP, and the |
| 2365 | LWP's ctl file descriptor might not be open. */ |
| 2366 | |
| 2367 | if (pi->ctl_fd == 0 && |
| 2368 | open_procinfo_files (pi, FD_CTL) == 0) |
| 2369 | { |
| 2370 | return 0; |
| 2371 | } |
| 2372 | else |
| 2373 | { |
| 2374 | #ifdef NEW_PROC_API |
| 2375 | procfs_ctl_t cmd[2]; |
| 2376 | |
| 2377 | cmd[0] = PCKILL; |
| 2378 | cmd[1] = signo; |
| 2379 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); |
| 2380 | #else /* ioctl method */ |
| 2381 | /* FIXME: do I need the Alpha OSF fixups present in |
| 2382 | procfs.c/unconditionally_kill_inferior? Perhaps only for SIGKILL? */ |
| 2383 | win = (ioctl (pi->ctl_fd, PIOCKILL, &signo) >= 0); |
| 2384 | #endif |
| 2385 | } |
| 2386 | |
| 2387 | return win; |
| 2388 | } |
| 2389 | |
| 2390 | /* Find the pid of the process that started this one. Returns the |
| 2391 | parent process pid, or zero. */ |
| 2392 | |
| 2393 | static int |
| 2394 | proc_parent_pid (procinfo *pi) |
| 2395 | { |
| 2396 | /* We should never have to apply this operation to any procinfo |
| 2397 | except the one for the main process. If that ever changes for |
| 2398 | any reason, then take out the following clause and replace it |
| 2399 | with one that makes sure the ctl_fd is open. */ |
| 2400 | |
| 2401 | if (pi->tid != 0) |
| 2402 | pi = find_procinfo_or_die (pi->pid, 0); |
| 2403 | |
| 2404 | if (!pi->status_valid) |
| 2405 | if (!proc_get_status (pi)) |
| 2406 | return 0; |
| 2407 | |
| 2408 | return pi->prstatus.pr_ppid; |
| 2409 | } |
| 2410 | |
| 2411 | /* Convert a target address (a.k.a. CORE_ADDR) into a host address |
| 2412 | (a.k.a void pointer)! */ |
| 2413 | |
| 2414 | #if (defined (PCWATCH) || defined (PIOCSWATCH)) \ |
| 2415 | && !(defined (PIOCOPENLWP)) |
| 2416 | static void * |
| 2417 | procfs_address_to_host_pointer (CORE_ADDR addr) |
| 2418 | { |
| 2419 | struct type *ptr_type = builtin_type (target_gdbarch ())->builtin_data_ptr; |
| 2420 | void *ptr; |
| 2421 | |
| 2422 | gdb_assert (sizeof (ptr) == TYPE_LENGTH (ptr_type)); |
| 2423 | gdbarch_address_to_pointer (target_gdbarch (), ptr_type, |
| 2424 | (gdb_byte *) &ptr, addr); |
| 2425 | return ptr; |
| 2426 | } |
| 2427 | #endif |
| 2428 | |
| 2429 | static int |
| 2430 | proc_set_watchpoint (procinfo *pi, CORE_ADDR addr, int len, int wflags) |
| 2431 | { |
| 2432 | #if !defined (PCWATCH) && !defined (PIOCSWATCH) |
| 2433 | /* If neither or these is defined, we can't support watchpoints. |
| 2434 | This just avoids possibly failing to compile the below on such |
| 2435 | systems. */ |
| 2436 | return 0; |
| 2437 | #else |
| 2438 | /* Horrible hack! Detect Solaris 2.5, because this doesn't work on 2.5. */ |
| 2439 | #if defined (PIOCOPENLWP) /* Solaris 2.5: bail out. */ |
| 2440 | return 0; |
| 2441 | #else |
| 2442 | struct { |
| 2443 | procfs_ctl_t cmd; |
| 2444 | char watch[sizeof (prwatch_t)]; |
| 2445 | } arg; |
| 2446 | prwatch_t pwatch; |
| 2447 | |
| 2448 | /* NOTE: cagney/2003-02-01: Even more horrible hack. Need to |
| 2449 | convert a target address into something that can be stored in a |
| 2450 | native data structure. */ |
| 2451 | #ifdef PCAGENT /* Horrible hack: only defined on Solaris 2.6+ */ |
| 2452 | pwatch.pr_vaddr = (uintptr_t) procfs_address_to_host_pointer (addr); |
| 2453 | #else |
| 2454 | pwatch.pr_vaddr = (caddr_t) procfs_address_to_host_pointer (addr); |
| 2455 | #endif |
| 2456 | pwatch.pr_size = len; |
| 2457 | pwatch.pr_wflags = wflags; |
| 2458 | #if defined(NEW_PROC_API) && defined (PCWATCH) |
| 2459 | arg.cmd = PCWATCH; |
| 2460 | memcpy (arg.watch, &pwatch, sizeof (prwatch_t)); |
| 2461 | return (write (pi->ctl_fd, &arg, sizeof (arg)) == sizeof (arg)); |
| 2462 | #else |
| 2463 | #if defined (PIOCSWATCH) |
| 2464 | return (ioctl (pi->ctl_fd, PIOCSWATCH, &pwatch) >= 0); |
| 2465 | #else |
| 2466 | return 0; /* Fail */ |
| 2467 | #endif |
| 2468 | #endif |
| 2469 | #endif |
| 2470 | #endif |
| 2471 | } |
| 2472 | |
| 2473 | #if (defined(__i386__) || defined(__x86_64__)) && defined (sun) |
| 2474 | |
| 2475 | #include <sys/sysi86.h> |
| 2476 | |
| 2477 | /* The KEY is actually the value of the lower 16 bits of the GS |
| 2478 | register for the LWP that we're interested in. Returns the |
| 2479 | matching ssh struct (LDT entry). */ |
| 2480 | |
| 2481 | static struct ssd * |
| 2482 | proc_get_LDT_entry (procinfo *pi, int key) |
| 2483 | { |
| 2484 | static struct ssd *ldt_entry = NULL; |
| 2485 | #ifdef NEW_PROC_API |
| 2486 | char pathname[MAX_PROC_NAME_SIZE]; |
| 2487 | struct cleanup *old_chain = NULL; |
| 2488 | int fd; |
| 2489 | |
| 2490 | /* Allocate space for one LDT entry. |
| 2491 | This alloc must persist, because we return a pointer to it. */ |
| 2492 | if (ldt_entry == NULL) |
| 2493 | ldt_entry = XNEW (struct ssd); |
| 2494 | |
| 2495 | /* Open the file descriptor for the LDT table. */ |
| 2496 | sprintf (pathname, "/proc/%d/ldt", pi->pid); |
| 2497 | if ((fd = open_with_retry (pathname, O_RDONLY)) < 0) |
| 2498 | { |
| 2499 | proc_warn (pi, "proc_get_LDT_entry (open)", __LINE__); |
| 2500 | return NULL; |
| 2501 | } |
| 2502 | /* Make sure it gets closed again! */ |
| 2503 | old_chain = make_cleanup_close (fd); |
| 2504 | |
| 2505 | /* Now 'read' thru the table, find a match and return it. */ |
| 2506 | while (read (fd, ldt_entry, sizeof (struct ssd)) == sizeof (struct ssd)) |
| 2507 | { |
| 2508 | if (ldt_entry->sel == 0 && |
| 2509 | ldt_entry->bo == 0 && |
| 2510 | ldt_entry->acc1 == 0 && |
| 2511 | ldt_entry->acc2 == 0) |
| 2512 | break; /* end of table */ |
| 2513 | /* If key matches, return this entry. */ |
| 2514 | if (ldt_entry->sel == key) |
| 2515 | return ldt_entry; |
| 2516 | } |
| 2517 | /* Loop ended, match not found. */ |
| 2518 | return NULL; |
| 2519 | #else |
| 2520 | int nldt, i; |
| 2521 | static int nalloc = 0; |
| 2522 | |
| 2523 | /* Get the number of LDT entries. */ |
| 2524 | if (ioctl (pi->ctl_fd, PIOCNLDT, &nldt) < 0) |
| 2525 | { |
| 2526 | proc_warn (pi, "proc_get_LDT_entry (PIOCNLDT)", __LINE__); |
| 2527 | return NULL; |
| 2528 | } |
| 2529 | |
| 2530 | /* Allocate space for the number of LDT entries. */ |
| 2531 | /* This alloc has to persist, 'cause we return a pointer to it. */ |
| 2532 | if (nldt > nalloc) |
| 2533 | { |
| 2534 | ldt_entry = (struct ssd *) |
| 2535 | xrealloc (ldt_entry, (nldt + 1) * sizeof (struct ssd)); |
| 2536 | nalloc = nldt; |
| 2537 | } |
| 2538 | |
| 2539 | /* Read the whole table in one gulp. */ |
| 2540 | if (ioctl (pi->ctl_fd, PIOCLDT, ldt_entry) < 0) |
| 2541 | { |
| 2542 | proc_warn (pi, "proc_get_LDT_entry (PIOCLDT)", __LINE__); |
| 2543 | return NULL; |
| 2544 | } |
| 2545 | |
| 2546 | /* Search the table and return the (first) entry matching 'key'. */ |
| 2547 | for (i = 0; i < nldt; i++) |
| 2548 | if (ldt_entry[i].sel == key) |
| 2549 | return &ldt_entry[i]; |
| 2550 | |
| 2551 | /* Loop ended, match not found. */ |
| 2552 | return NULL; |
| 2553 | #endif |
| 2554 | } |
| 2555 | |
| 2556 | /* Returns the pointer to the LDT entry of PTID. */ |
| 2557 | |
| 2558 | struct ssd * |
| 2559 | procfs_find_LDT_entry (ptid_t ptid) |
| 2560 | { |
| 2561 | gdb_gregset_t *gregs; |
| 2562 | int key; |
| 2563 | procinfo *pi; |
| 2564 | |
| 2565 | /* Find procinfo for the lwp. */ |
| 2566 | if ((pi = find_procinfo (ptid_get_pid (ptid), ptid_get_lwp (ptid))) == NULL) |
| 2567 | { |
| 2568 | warning (_("procfs_find_LDT_entry: could not find procinfo for %d:%ld."), |
| 2569 | ptid_get_pid (ptid), ptid_get_lwp (ptid)); |
| 2570 | return NULL; |
| 2571 | } |
| 2572 | /* get its general registers. */ |
| 2573 | if ((gregs = proc_get_gregs (pi)) == NULL) |
| 2574 | { |
| 2575 | warning (_("procfs_find_LDT_entry: could not read gregs for %d:%ld."), |
| 2576 | ptid_get_pid (ptid), ptid_get_lwp (ptid)); |
| 2577 | return NULL; |
| 2578 | } |
| 2579 | /* Now extract the GS register's lower 16 bits. */ |
| 2580 | key = (*gregs)[GS] & 0xffff; |
| 2581 | |
| 2582 | /* Find the matching entry and return it. */ |
| 2583 | return proc_get_LDT_entry (pi, key); |
| 2584 | } |
| 2585 | |
| 2586 | #endif |
| 2587 | |
| 2588 | /* =============== END, non-thread part of /proc "MODULE" =============== */ |
| 2589 | |
| 2590 | /* =================== Thread "MODULE" =================== */ |
| 2591 | |
| 2592 | /* NOTE: you'll see more ifdefs and duplication of functions here, |
| 2593 | since there is a different way to do threads on every OS. */ |
| 2594 | |
| 2595 | /* Returns the number of threads for the process. */ |
| 2596 | |
| 2597 | #if defined (PIOCNTHR) && defined (PIOCTLIST) |
| 2598 | /* OSF version */ |
| 2599 | static int |
| 2600 | proc_get_nthreads (procinfo *pi) |
| 2601 | { |
| 2602 | int nthreads = 0; |
| 2603 | |
| 2604 | if (ioctl (pi->ctl_fd, PIOCNTHR, &nthreads) < 0) |
| 2605 | proc_warn (pi, "procfs: PIOCNTHR failed", __LINE__); |
| 2606 | |
| 2607 | return nthreads; |
| 2608 | } |
| 2609 | |
| 2610 | #else |
| 2611 | #if defined (SYS_lwpcreate) || defined (SYS_lwp_create) /* FIXME: multiple */ |
| 2612 | /* Solaris version */ |
| 2613 | static int |
| 2614 | proc_get_nthreads (procinfo *pi) |
| 2615 | { |
| 2616 | if (!pi->status_valid) |
| 2617 | if (!proc_get_status (pi)) |
| 2618 | return 0; |
| 2619 | |
| 2620 | /* NEW_PROC_API: only works for the process procinfo, because the |
| 2621 | LWP procinfos do not get prstatus filled in. */ |
| 2622 | #ifdef NEW_PROC_API |
| 2623 | if (pi->tid != 0) /* Find the parent process procinfo. */ |
| 2624 | pi = find_procinfo_or_die (pi->pid, 0); |
| 2625 | #endif |
| 2626 | return pi->prstatus.pr_nlwp; |
| 2627 | } |
| 2628 | |
| 2629 | #else |
| 2630 | /* Default version */ |
| 2631 | static int |
| 2632 | proc_get_nthreads (procinfo *pi) |
| 2633 | { |
| 2634 | return 0; |
| 2635 | } |
| 2636 | #endif |
| 2637 | #endif |
| 2638 | |
| 2639 | /* LWP version. |
| 2640 | |
| 2641 | Return the ID of the thread that had an event of interest. |
| 2642 | (ie. the one that hit a breakpoint or other traced event). All |
| 2643 | other things being equal, this should be the ID of a thread that is |
| 2644 | currently executing. */ |
| 2645 | |
| 2646 | #if defined (SYS_lwpcreate) || defined (SYS_lwp_create) /* FIXME: multiple */ |
| 2647 | /* Solaris version */ |
| 2648 | static int |
| 2649 | proc_get_current_thread (procinfo *pi) |
| 2650 | { |
| 2651 | /* Note: this should be applied to the root procinfo for the |
| 2652 | process, not to the procinfo for an LWP. If applied to the |
| 2653 | procinfo for an LWP, it will simply return that LWP's ID. In |
| 2654 | that case, find the parent process procinfo. */ |
| 2655 | |
| 2656 | if (pi->tid != 0) |
| 2657 | pi = find_procinfo_or_die (pi->pid, 0); |
| 2658 | |
| 2659 | if (!pi->status_valid) |
| 2660 | if (!proc_get_status (pi)) |
| 2661 | return 0; |
| 2662 | |
| 2663 | #ifdef NEW_PROC_API |
| 2664 | return pi->prstatus.pr_lwp.pr_lwpid; |
| 2665 | #else |
| 2666 | return pi->prstatus.pr_who; |
| 2667 | #endif |
| 2668 | } |
| 2669 | |
| 2670 | #else |
| 2671 | #if defined (PIOCNTHR) && defined (PIOCTLIST) |
| 2672 | /* OSF version */ |
| 2673 | static int |
| 2674 | proc_get_current_thread (procinfo *pi) |
| 2675 | { |
| 2676 | #if 0 /* FIXME: not ready for prime time? */ |
| 2677 | return pi->prstatus.pr_tid; |
| 2678 | #else |
| 2679 | return 0; |
| 2680 | #endif |
| 2681 | } |
| 2682 | |
| 2683 | #else |
| 2684 | /* Default version */ |
| 2685 | static int |
| 2686 | proc_get_current_thread (procinfo *pi) |
| 2687 | { |
| 2688 | return 0; |
| 2689 | } |
| 2690 | |
| 2691 | #endif |
| 2692 | #endif |
| 2693 | |
| 2694 | /* Discover the IDs of all the threads within the process, and create |
| 2695 | a procinfo for each of them (chained to the parent). This |
| 2696 | unfortunately requires a different method on every OS. Returns |
| 2697 | non-zero for success, zero for failure. */ |
| 2698 | |
| 2699 | static int |
| 2700 | proc_delete_dead_threads (procinfo *parent, procinfo *thread, void *ignore) |
| 2701 | { |
| 2702 | if (thread && parent) /* sanity */ |
| 2703 | { |
| 2704 | thread->status_valid = 0; |
| 2705 | if (!proc_get_status (thread)) |
| 2706 | destroy_one_procinfo (&parent->thread_list, thread); |
| 2707 | } |
| 2708 | return 0; /* keep iterating */ |
| 2709 | } |
| 2710 | |
| 2711 | #if defined (PIOCLSTATUS) |
| 2712 | /* Solaris 2.5 (ioctl) version */ |
| 2713 | static int |
| 2714 | proc_update_threads (procinfo *pi) |
| 2715 | { |
| 2716 | gdb_prstatus_t *prstatus; |
| 2717 | struct cleanup *old_chain = NULL; |
| 2718 | procinfo *thread; |
| 2719 | int nlwp, i; |
| 2720 | |
| 2721 | /* We should never have to apply this operation to any procinfo |
| 2722 | except the one for the main process. If that ever changes for |
| 2723 | any reason, then take out the following clause and replace it |
| 2724 | with one that makes sure the ctl_fd is open. */ |
| 2725 | |
| 2726 | if (pi->tid != 0) |
| 2727 | pi = find_procinfo_or_die (pi->pid, 0); |
| 2728 | |
| 2729 | proc_iterate_over_threads (pi, proc_delete_dead_threads, NULL); |
| 2730 | |
| 2731 | if ((nlwp = proc_get_nthreads (pi)) <= 1) |
| 2732 | return 1; /* Process is not multi-threaded; nothing to do. */ |
| 2733 | |
| 2734 | prstatus = XNEWVEC (gdb_prstatus_t, nlwp + 1); |
| 2735 | |
| 2736 | old_chain = make_cleanup (xfree, prstatus); |
| 2737 | if (ioctl (pi->ctl_fd, PIOCLSTATUS, prstatus) < 0) |
| 2738 | proc_error (pi, "update_threads (PIOCLSTATUS)", __LINE__); |
| 2739 | |
| 2740 | /* Skip element zero, which represents the process as a whole. */ |
| 2741 | for (i = 1; i < nlwp + 1; i++) |
| 2742 | { |
| 2743 | if ((thread = create_procinfo (pi->pid, prstatus[i].pr_who)) == NULL) |
| 2744 | proc_error (pi, "update_threads, create_procinfo", __LINE__); |
| 2745 | |
| 2746 | memcpy (&thread->prstatus, &prstatus[i], sizeof (*prstatus)); |
| 2747 | thread->status_valid = 1; |
| 2748 | } |
| 2749 | pi->threads_valid = 1; |
| 2750 | do_cleanups (old_chain); |
| 2751 | return 1; |
| 2752 | } |
| 2753 | #else |
| 2754 | #ifdef NEW_PROC_API |
| 2755 | /* Solaris 6 (and later) version. */ |
| 2756 | static void |
| 2757 | do_closedir_cleanup (void *dir) |
| 2758 | { |
| 2759 | closedir (dir); |
| 2760 | } |
| 2761 | |
| 2762 | static int |
| 2763 | proc_update_threads (procinfo *pi) |
| 2764 | { |
| 2765 | char pathname[MAX_PROC_NAME_SIZE + 16]; |
| 2766 | struct dirent *direntry; |
| 2767 | struct cleanup *old_chain = NULL; |
| 2768 | procinfo *thread; |
| 2769 | DIR *dirp; |
| 2770 | int lwpid; |
| 2771 | |
| 2772 | /* We should never have to apply this operation to any procinfo |
| 2773 | except the one for the main process. If that ever changes for |
| 2774 | any reason, then take out the following clause and replace it |
| 2775 | with one that makes sure the ctl_fd is open. */ |
| 2776 | |
| 2777 | if (pi->tid != 0) |
| 2778 | pi = find_procinfo_or_die (pi->pid, 0); |
| 2779 | |
| 2780 | proc_iterate_over_threads (pi, proc_delete_dead_threads, NULL); |
| 2781 | |
| 2782 | /* Note: this brute-force method was originally devised for Unixware |
| 2783 | (support removed since), and will also work on Solaris 2.6 and |
| 2784 | 2.7. The original comment mentioned the existence of a much |
| 2785 | simpler and more elegant way to do this on Solaris, but didn't |
| 2786 | point out what that was. */ |
| 2787 | |
| 2788 | strcpy (pathname, pi->pathname); |
| 2789 | strcat (pathname, "/lwp"); |
| 2790 | if ((dirp = opendir (pathname)) == NULL) |
| 2791 | proc_error (pi, "update_threads, opendir", __LINE__); |
| 2792 | |
| 2793 | old_chain = make_cleanup (do_closedir_cleanup, dirp); |
| 2794 | while ((direntry = readdir (dirp)) != NULL) |
| 2795 | if (direntry->d_name[0] != '.') /* skip '.' and '..' */ |
| 2796 | { |
| 2797 | lwpid = atoi (&direntry->d_name[0]); |
| 2798 | if ((thread = create_procinfo (pi->pid, lwpid)) == NULL) |
| 2799 | proc_error (pi, "update_threads, create_procinfo", __LINE__); |
| 2800 | } |
| 2801 | pi->threads_valid = 1; |
| 2802 | do_cleanups (old_chain); |
| 2803 | return 1; |
| 2804 | } |
| 2805 | #else |
| 2806 | #ifdef PIOCTLIST |
| 2807 | /* OSF version */ |
| 2808 | static int |
| 2809 | proc_update_threads (procinfo *pi) |
| 2810 | { |
| 2811 | int nthreads, i; |
| 2812 | tid_t *threads; |
| 2813 | |
| 2814 | /* We should never have to apply this operation to any procinfo |
| 2815 | except the one for the main process. If that ever changes for |
| 2816 | any reason, then take out the following clause and replace it |
| 2817 | with one that makes sure the ctl_fd is open. */ |
| 2818 | |
| 2819 | if (pi->tid != 0) |
| 2820 | pi = find_procinfo_or_die (pi->pid, 0); |
| 2821 | |
| 2822 | proc_iterate_over_threads (pi, proc_delete_dead_threads, NULL); |
| 2823 | |
| 2824 | nthreads = proc_get_nthreads (pi); |
| 2825 | if (nthreads < 2) |
| 2826 | return 0; /* Nothing to do for 1 or fewer threads. */ |
| 2827 | |
| 2828 | threads = XNEWVEC (tid_t, nthreads); |
| 2829 | |
| 2830 | if (ioctl (pi->ctl_fd, PIOCTLIST, threads) < 0) |
| 2831 | proc_error (pi, "procfs: update_threads (PIOCTLIST)", __LINE__); |
| 2832 | |
| 2833 | for (i = 0; i < nthreads; i++) |
| 2834 | { |
| 2835 | if (!find_procinfo (pi->pid, threads[i])) |
| 2836 | if (!create_procinfo (pi->pid, threads[i])) |
| 2837 | proc_error (pi, "update_threads, create_procinfo", __LINE__); |
| 2838 | } |
| 2839 | pi->threads_valid = 1; |
| 2840 | return 1; |
| 2841 | } |
| 2842 | #else |
| 2843 | /* Default version */ |
| 2844 | static int |
| 2845 | proc_update_threads (procinfo *pi) |
| 2846 | { |
| 2847 | return 0; |
| 2848 | } |
| 2849 | #endif /* OSF PIOCTLIST */ |
| 2850 | #endif /* NEW_PROC_API */ |
| 2851 | #endif /* SOL 2.5 PIOCLSTATUS */ |
| 2852 | |
| 2853 | /* Given a pointer to a function, call that function once for each lwp |
| 2854 | in the procinfo list, until the function returns non-zero, in which |
| 2855 | event return the value returned by the function. |
| 2856 | |
| 2857 | Note: this function does NOT call update_threads. If you want to |
| 2858 | discover new threads first, you must call that function explicitly. |
| 2859 | This function just makes a quick pass over the currently-known |
| 2860 | procinfos. |
| 2861 | |
| 2862 | PI is the parent process procinfo. FUNC is the per-thread |
| 2863 | function. PTR is an opaque parameter for function. Returns the |
| 2864 | first non-zero return value from the callee, or zero. */ |
| 2865 | |
| 2866 | static int |
| 2867 | proc_iterate_over_threads (procinfo *pi, |
| 2868 | int (*func) (procinfo *, procinfo *, void *), |
| 2869 | void *ptr) |
| 2870 | { |
| 2871 | procinfo *thread, *next; |
| 2872 | int retval = 0; |
| 2873 | |
| 2874 | /* We should never have to apply this operation to any procinfo |
| 2875 | except the one for the main process. If that ever changes for |
| 2876 | any reason, then take out the following clause and replace it |
| 2877 | with one that makes sure the ctl_fd is open. */ |
| 2878 | |
| 2879 | if (pi->tid != 0) |
| 2880 | pi = find_procinfo_or_die (pi->pid, 0); |
| 2881 | |
| 2882 | for (thread = pi->thread_list; thread != NULL; thread = next) |
| 2883 | { |
| 2884 | next = thread->next; /* In case thread is destroyed. */ |
| 2885 | if ((retval = (*func) (pi, thread, ptr)) != 0) |
| 2886 | break; |
| 2887 | } |
| 2888 | |
| 2889 | return retval; |
| 2890 | } |
| 2891 | |
| 2892 | /* =================== END, Thread "MODULE" =================== */ |
| 2893 | |
| 2894 | /* =================== END, /proc "MODULE" =================== */ |
| 2895 | |
| 2896 | /* =================== GDB "MODULE" =================== */ |
| 2897 | |
| 2898 | /* Here are all of the gdb target vector functions and their |
| 2899 | friends. */ |
| 2900 | |
| 2901 | static ptid_t do_attach (ptid_t ptid); |
| 2902 | static void do_detach (int signo); |
| 2903 | static void proc_trace_syscalls_1 (procinfo *pi, int syscallnum, |
| 2904 | int entry_or_exit, int mode, int from_tty); |
| 2905 | |
| 2906 | /* Sets up the inferior to be debugged. Registers to trace signals, |
| 2907 | hardware faults, and syscalls. Note: does not set RLC flag: caller |
| 2908 | may want to customize that. Returns zero for success (note! |
| 2909 | unlike most functions in this module); on failure, returns the LINE |
| 2910 | NUMBER where it failed! */ |
| 2911 | |
| 2912 | static int |
| 2913 | procfs_debug_inferior (procinfo *pi) |
| 2914 | { |
| 2915 | fltset_t traced_faults; |
| 2916 | gdb_sigset_t traced_signals; |
| 2917 | sysset_t *traced_syscall_entries; |
| 2918 | sysset_t *traced_syscall_exits; |
| 2919 | int status; |
| 2920 | |
| 2921 | /* Register to trace hardware faults in the child. */ |
| 2922 | prfillset (&traced_faults); /* trace all faults... */ |
| 2923 | gdb_prdelset (&traced_faults, FLTPAGE); /* except page fault. */ |
| 2924 | if (!proc_set_traced_faults (pi, &traced_faults)) |
| 2925 | return __LINE__; |
| 2926 | |
| 2927 | /* Initially, register to trace all signals in the child. */ |
| 2928 | prfillset (&traced_signals); |
| 2929 | if (!proc_set_traced_signals (pi, &traced_signals)) |
| 2930 | return __LINE__; |
| 2931 | |
| 2932 | |
| 2933 | /* Register to trace the 'exit' system call (on entry). */ |
| 2934 | traced_syscall_entries = sysset_t_alloc (pi); |
| 2935 | gdb_premptysysset (traced_syscall_entries); |
| 2936 | #ifdef SYS_exit |
| 2937 | gdb_praddsysset (traced_syscall_entries, SYS_exit); |
| 2938 | #endif |
| 2939 | #ifdef SYS_lwpexit |
| 2940 | gdb_praddsysset (traced_syscall_entries, SYS_lwpexit);/* And _lwp_exit... */ |
| 2941 | #endif |
| 2942 | #ifdef SYS_lwp_exit |
| 2943 | gdb_praddsysset (traced_syscall_entries, SYS_lwp_exit); |
| 2944 | #endif |
| 2945 | #ifdef DYNAMIC_SYSCALLS |
| 2946 | { |
| 2947 | int callnum = find_syscall (pi, "_exit"); |
| 2948 | |
| 2949 | if (callnum >= 0) |
| 2950 | gdb_praddsysset (traced_syscall_entries, callnum); |
| 2951 | } |
| 2952 | #endif |
| 2953 | |
| 2954 | status = proc_set_traced_sysentry (pi, traced_syscall_entries); |
| 2955 | xfree (traced_syscall_entries); |
| 2956 | if (!status) |
| 2957 | return __LINE__; |
| 2958 | |
| 2959 | #ifdef PRFS_STOPEXEC /* defined on OSF */ |
| 2960 | /* OSF method for tracing exec syscalls. Quoting: |
| 2961 | Under Alpha OSF/1 we have to use a PIOCSSPCACT ioctl to trace |
| 2962 | exits from exec system calls because of the user level loader. */ |
| 2963 | /* FIXME: make nice and maybe move into an access function. */ |
| 2964 | { |
| 2965 | int prfs_flags; |
| 2966 | |
| 2967 | if (ioctl (pi->ctl_fd, PIOCGSPCACT, &prfs_flags) < 0) |
| 2968 | return __LINE__; |
| 2969 | |
| 2970 | prfs_flags |= PRFS_STOPEXEC; |
| 2971 | |
| 2972 | if (ioctl (pi->ctl_fd, PIOCSSPCACT, &prfs_flags) < 0) |
| 2973 | return __LINE__; |
| 2974 | } |
| 2975 | #else /* not PRFS_STOPEXEC */ |
| 2976 | /* Everyone else's (except OSF) method for tracing exec syscalls. */ |
| 2977 | /* GW: Rationale... |
| 2978 | Not all systems with /proc have all the exec* syscalls with the same |
| 2979 | names. On the SGI, for example, there is no SYS_exec, but there |
| 2980 | *is* a SYS_execv. So, we try to account for that. */ |
| 2981 | |
| 2982 | traced_syscall_exits = sysset_t_alloc (pi); |
| 2983 | gdb_premptysysset (traced_syscall_exits); |
| 2984 | #ifdef SYS_exec |
| 2985 | gdb_praddsysset (traced_syscall_exits, SYS_exec); |
| 2986 | #endif |
| 2987 | #ifdef SYS_execve |
| 2988 | gdb_praddsysset (traced_syscall_exits, SYS_execve); |
| 2989 | #endif |
| 2990 | #ifdef SYS_execv |
| 2991 | gdb_praddsysset (traced_syscall_exits, SYS_execv); |
| 2992 | #endif |
| 2993 | |
| 2994 | #ifdef SYS_lwpcreate |
| 2995 | gdb_praddsysset (traced_syscall_exits, SYS_lwpcreate); |
| 2996 | gdb_praddsysset (traced_syscall_exits, SYS_lwpexit); |
| 2997 | #endif |
| 2998 | |
| 2999 | #ifdef SYS_lwp_create /* FIXME: once only, please. */ |
| 3000 | gdb_praddsysset (traced_syscall_exits, SYS_lwp_create); |
| 3001 | gdb_praddsysset (traced_syscall_exits, SYS_lwp_exit); |
| 3002 | #endif |
| 3003 | |
| 3004 | #ifdef DYNAMIC_SYSCALLS |
| 3005 | { |
| 3006 | int callnum = find_syscall (pi, "execve"); |
| 3007 | |
| 3008 | if (callnum >= 0) |
| 3009 | gdb_praddsysset (traced_syscall_exits, callnum); |
| 3010 | callnum = find_syscall (pi, "ra_execve"); |
| 3011 | if (callnum >= 0) |
| 3012 | gdb_praddsysset (traced_syscall_exits, callnum); |
| 3013 | } |
| 3014 | #endif |
| 3015 | |
| 3016 | status = proc_set_traced_sysexit (pi, traced_syscall_exits); |
| 3017 | xfree (traced_syscall_exits); |
| 3018 | if (!status) |
| 3019 | return __LINE__; |
| 3020 | |
| 3021 | #endif /* PRFS_STOPEXEC */ |
| 3022 | return 0; |
| 3023 | } |
| 3024 | |
| 3025 | static void |
| 3026 | procfs_attach (struct target_ops *ops, const char *args, int from_tty) |
| 3027 | { |
| 3028 | char *exec_file; |
| 3029 | int pid; |
| 3030 | |
| 3031 | pid = parse_pid_to_attach (args); |
| 3032 | |
| 3033 | if (pid == getpid ()) |
| 3034 | error (_("Attaching GDB to itself is not a good idea...")); |
| 3035 | |
| 3036 | if (from_tty) |
| 3037 | { |
| 3038 | exec_file = get_exec_file (0); |
| 3039 | |
| 3040 | if (exec_file) |
| 3041 | printf_filtered (_("Attaching to program `%s', %s\n"), |
| 3042 | exec_file, target_pid_to_str (pid_to_ptid (pid))); |
| 3043 | else |
| 3044 | printf_filtered (_("Attaching to %s\n"), |
| 3045 | target_pid_to_str (pid_to_ptid (pid))); |
| 3046 | |
| 3047 | fflush (stdout); |
| 3048 | } |
| 3049 | inferior_ptid = do_attach (pid_to_ptid (pid)); |
| 3050 | if (!target_is_pushed (ops)) |
| 3051 | push_target (ops); |
| 3052 | } |
| 3053 | |
| 3054 | static void |
| 3055 | procfs_detach (struct target_ops *ops, const char *args, int from_tty) |
| 3056 | { |
| 3057 | int sig = 0; |
| 3058 | int pid = ptid_get_pid (inferior_ptid); |
| 3059 | |
| 3060 | if (args) |
| 3061 | sig = atoi (args); |
| 3062 | |
| 3063 | if (from_tty) |
| 3064 | { |
| 3065 | char *exec_file; |
| 3066 | |
| 3067 | exec_file = get_exec_file (0); |
| 3068 | if (exec_file == NULL) |
| 3069 | exec_file = ""; |
| 3070 | |
| 3071 | printf_filtered (_("Detaching from program: %s, %s\n"), exec_file, |
| 3072 | target_pid_to_str (pid_to_ptid (pid))); |
| 3073 | gdb_flush (gdb_stdout); |
| 3074 | } |
| 3075 | |
| 3076 | do_detach (sig); |
| 3077 | |
| 3078 | inferior_ptid = null_ptid; |
| 3079 | detach_inferior (pid); |
| 3080 | inf_child_maybe_unpush_target (ops); |
| 3081 | } |
| 3082 | |
| 3083 | static ptid_t |
| 3084 | do_attach (ptid_t ptid) |
| 3085 | { |
| 3086 | procinfo *pi; |
| 3087 | struct inferior *inf; |
| 3088 | int fail; |
| 3089 | int lwpid; |
| 3090 | |
| 3091 | if ((pi = create_procinfo (ptid_get_pid (ptid), 0)) == NULL) |
| 3092 | perror (_("procfs: out of memory in 'attach'")); |
| 3093 | |
| 3094 | if (!open_procinfo_files (pi, FD_CTL)) |
| 3095 | { |
| 3096 | fprintf_filtered (gdb_stderr, "procfs:%d -- ", __LINE__); |
| 3097 | sprintf (errmsg, "do_attach: couldn't open /proc file for process %d", |
| 3098 | ptid_get_pid (ptid)); |
| 3099 | dead_procinfo (pi, errmsg, NOKILL); |
| 3100 | } |
| 3101 | |
| 3102 | /* Stop the process (if it isn't already stopped). */ |
| 3103 | if (proc_flags (pi) & (PR_STOPPED | PR_ISTOP)) |
| 3104 | { |
| 3105 | pi->was_stopped = 1; |
| 3106 | proc_prettyprint_why (proc_why (pi), proc_what (pi), 1); |
| 3107 | } |
| 3108 | else |
| 3109 | { |
| 3110 | pi->was_stopped = 0; |
| 3111 | /* Set the process to run again when we close it. */ |
| 3112 | if (!proc_set_run_on_last_close (pi)) |
| 3113 | dead_procinfo (pi, "do_attach: couldn't set RLC.", NOKILL); |
| 3114 | |
| 3115 | /* Now stop the process. */ |
| 3116 | if (!proc_stop_process (pi)) |
| 3117 | dead_procinfo (pi, "do_attach: couldn't stop the process.", NOKILL); |
| 3118 | pi->ignore_next_sigstop = 1; |
| 3119 | } |
| 3120 | /* Save some of the /proc state to be restored if we detach. */ |
| 3121 | if (!proc_get_traced_faults (pi, &pi->saved_fltset)) |
| 3122 | dead_procinfo (pi, "do_attach: couldn't save traced faults.", NOKILL); |
| 3123 | if (!proc_get_traced_signals (pi, &pi->saved_sigset)) |
| 3124 | dead_procinfo (pi, "do_attach: couldn't save traced signals.", NOKILL); |
| 3125 | if (!proc_get_traced_sysentry (pi, pi->saved_entryset)) |
| 3126 | dead_procinfo (pi, "do_attach: couldn't save traced syscall entries.", |
| 3127 | NOKILL); |
| 3128 | if (!proc_get_traced_sysexit (pi, pi->saved_exitset)) |
| 3129 | dead_procinfo (pi, "do_attach: couldn't save traced syscall exits.", |
| 3130 | NOKILL); |
| 3131 | if (!proc_get_held_signals (pi, &pi->saved_sighold)) |
| 3132 | dead_procinfo (pi, "do_attach: couldn't save held signals.", NOKILL); |
| 3133 | |
| 3134 | if ((fail = procfs_debug_inferior (pi)) != 0) |
| 3135 | dead_procinfo (pi, "do_attach: failed in procfs_debug_inferior", NOKILL); |
| 3136 | |
| 3137 | inf = current_inferior (); |
| 3138 | inferior_appeared (inf, pi->pid); |
| 3139 | /* Let GDB know that the inferior was attached. */ |
| 3140 | inf->attach_flag = 1; |
| 3141 | |
| 3142 | /* Create a procinfo for the current lwp. */ |
| 3143 | lwpid = proc_get_current_thread (pi); |
| 3144 | create_procinfo (pi->pid, lwpid); |
| 3145 | |
| 3146 | /* Add it to gdb's thread list. */ |
| 3147 | ptid = ptid_build (pi->pid, lwpid, 0); |
| 3148 | add_thread (ptid); |
| 3149 | |
| 3150 | return ptid; |
| 3151 | } |
| 3152 | |
| 3153 | static void |
| 3154 | do_detach (int signo) |
| 3155 | { |
| 3156 | procinfo *pi; |
| 3157 | |
| 3158 | /* Find procinfo for the main process. */ |
| 3159 | pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), |
| 3160 | 0); /* FIXME: threads */ |
| 3161 | if (signo) |
| 3162 | if (!proc_set_current_signal (pi, signo)) |
| 3163 | proc_warn (pi, "do_detach, set_current_signal", __LINE__); |
| 3164 | |
| 3165 | if (!proc_set_traced_signals (pi, &pi->saved_sigset)) |
| 3166 | proc_warn (pi, "do_detach, set_traced_signal", __LINE__); |
| 3167 | |
| 3168 | if (!proc_set_traced_faults (pi, &pi->saved_fltset)) |
| 3169 | proc_warn (pi, "do_detach, set_traced_faults", __LINE__); |
| 3170 | |
| 3171 | if (!proc_set_traced_sysentry (pi, pi->saved_entryset)) |
| 3172 | proc_warn (pi, "do_detach, set_traced_sysentry", __LINE__); |
| 3173 | |
| 3174 | if (!proc_set_traced_sysexit (pi, pi->saved_exitset)) |
| 3175 | proc_warn (pi, "do_detach, set_traced_sysexit", __LINE__); |
| 3176 | |
| 3177 | if (!proc_set_held_signals (pi, &pi->saved_sighold)) |
| 3178 | proc_warn (pi, "do_detach, set_held_signals", __LINE__); |
| 3179 | |
| 3180 | if (signo || (proc_flags (pi) & (PR_STOPPED | PR_ISTOP))) |
| 3181 | if (signo || !(pi->was_stopped) || |
| 3182 | query (_("Was stopped when attached, make it runnable again? "))) |
| 3183 | { |
| 3184 | /* Clear any pending signal. */ |
| 3185 | if (!proc_clear_current_fault (pi)) |
| 3186 | proc_warn (pi, "do_detach, clear_current_fault", __LINE__); |
| 3187 | |
| 3188 | if (signo == 0 && !proc_clear_current_signal (pi)) |
| 3189 | proc_warn (pi, "do_detach, clear_current_signal", __LINE__); |
| 3190 | |
| 3191 | if (!proc_set_run_on_last_close (pi)) |
| 3192 | proc_warn (pi, "do_detach, set_rlc", __LINE__); |
| 3193 | } |
| 3194 | |
| 3195 | destroy_procinfo (pi); |
| 3196 | } |
| 3197 | |
| 3198 | /* Fetch register REGNUM from the inferior. If REGNUM is -1, do this |
| 3199 | for all registers. |
| 3200 | |
| 3201 | ??? Is the following note still relevant? We can't get individual |
| 3202 | registers with the PT_GETREGS ptrace(2) request either, yet we |
| 3203 | don't bother with caching at all in that case. |
| 3204 | |
| 3205 | NOTE: Since the /proc interface cannot give us individual |
| 3206 | registers, we pay no attention to REGNUM, and just fetch them all. |
| 3207 | This results in the possibility that we will do unnecessarily many |
| 3208 | fetches, since we may be called repeatedly for individual |
| 3209 | registers. So we cache the results, and mark the cache invalid |
| 3210 | when the process is resumed. */ |
| 3211 | |
| 3212 | static void |
| 3213 | procfs_fetch_registers (struct target_ops *ops, |
| 3214 | struct regcache *regcache, int regnum) |
| 3215 | { |
| 3216 | gdb_gregset_t *gregs; |
| 3217 | procinfo *pi; |
| 3218 | int pid = ptid_get_pid (inferior_ptid); |
| 3219 | int tid = ptid_get_lwp (inferior_ptid); |
| 3220 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
| 3221 | |
| 3222 | pi = find_procinfo_or_die (pid, tid); |
| 3223 | |
| 3224 | if (pi == NULL) |
| 3225 | error (_("procfs: fetch_registers failed to find procinfo for %s"), |
| 3226 | target_pid_to_str (inferior_ptid)); |
| 3227 | |
| 3228 | gregs = proc_get_gregs (pi); |
| 3229 | if (gregs == NULL) |
| 3230 | proc_error (pi, "fetch_registers, get_gregs", __LINE__); |
| 3231 | |
| 3232 | supply_gregset (regcache, (const gdb_gregset_t *) gregs); |
| 3233 | |
| 3234 | if (gdbarch_fp0_regnum (gdbarch) >= 0) /* Do we have an FPU? */ |
| 3235 | { |
| 3236 | gdb_fpregset_t *fpregs; |
| 3237 | |
| 3238 | if ((regnum >= 0 && regnum < gdbarch_fp0_regnum (gdbarch)) |
| 3239 | || regnum == gdbarch_pc_regnum (gdbarch) |
| 3240 | || regnum == gdbarch_sp_regnum (gdbarch)) |
| 3241 | return; /* Not a floating point register. */ |
| 3242 | |
| 3243 | fpregs = proc_get_fpregs (pi); |
| 3244 | if (fpregs == NULL) |
| 3245 | proc_error (pi, "fetch_registers, get_fpregs", __LINE__); |
| 3246 | |
| 3247 | supply_fpregset (regcache, (const gdb_fpregset_t *) fpregs); |
| 3248 | } |
| 3249 | } |
| 3250 | |
| 3251 | /* Store register REGNUM back into the inferior. If REGNUM is -1, do |
| 3252 | this for all registers. |
| 3253 | |
| 3254 | NOTE: Since the /proc interface will not read individual registers, |
| 3255 | we will cache these requests until the process is resumed, and only |
| 3256 | then write them back to the inferior process. |
| 3257 | |
| 3258 | FIXME: is that a really bad idea? Have to think about cases where |
| 3259 | writing one register might affect the value of others, etc. */ |
| 3260 | |
| 3261 | static void |
| 3262 | procfs_store_registers (struct target_ops *ops, |
| 3263 | struct regcache *regcache, int regnum) |
| 3264 | { |
| 3265 | gdb_gregset_t *gregs; |
| 3266 | procinfo *pi; |
| 3267 | int pid = ptid_get_pid (inferior_ptid); |
| 3268 | int tid = ptid_get_lwp (inferior_ptid); |
| 3269 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
| 3270 | |
| 3271 | pi = find_procinfo_or_die (pid, tid); |
| 3272 | |
| 3273 | if (pi == NULL) |
| 3274 | error (_("procfs: store_registers: failed to find procinfo for %s"), |
| 3275 | target_pid_to_str (inferior_ptid)); |
| 3276 | |
| 3277 | gregs = proc_get_gregs (pi); |
| 3278 | if (gregs == NULL) |
| 3279 | proc_error (pi, "store_registers, get_gregs", __LINE__); |
| 3280 | |
| 3281 | fill_gregset (regcache, gregs, regnum); |
| 3282 | if (!proc_set_gregs (pi)) |
| 3283 | proc_error (pi, "store_registers, set_gregs", __LINE__); |
| 3284 | |
| 3285 | if (gdbarch_fp0_regnum (gdbarch) >= 0) /* Do we have an FPU? */ |
| 3286 | { |
| 3287 | gdb_fpregset_t *fpregs; |
| 3288 | |
| 3289 | if ((regnum >= 0 && regnum < gdbarch_fp0_regnum (gdbarch)) |
| 3290 | || regnum == gdbarch_pc_regnum (gdbarch) |
| 3291 | || regnum == gdbarch_sp_regnum (gdbarch)) |
| 3292 | return; /* Not a floating point register. */ |
| 3293 | |
| 3294 | fpregs = proc_get_fpregs (pi); |
| 3295 | if (fpregs == NULL) |
| 3296 | proc_error (pi, "store_registers, get_fpregs", __LINE__); |
| 3297 | |
| 3298 | fill_fpregset (regcache, fpregs, regnum); |
| 3299 | if (!proc_set_fpregs (pi)) |
| 3300 | proc_error (pi, "store_registers, set_fpregs", __LINE__); |
| 3301 | } |
| 3302 | } |
| 3303 | |
| 3304 | static int |
| 3305 | syscall_is_lwp_exit (procinfo *pi, int scall) |
| 3306 | { |
| 3307 | #ifdef SYS_lwp_exit |
| 3308 | if (scall == SYS_lwp_exit) |
| 3309 | return 1; |
| 3310 | #endif |
| 3311 | #ifdef SYS_lwpexit |
| 3312 | if (scall == SYS_lwpexit) |
| 3313 | return 1; |
| 3314 | #endif |
| 3315 | return 0; |
| 3316 | } |
| 3317 | |
| 3318 | static int |
| 3319 | syscall_is_exit (procinfo *pi, int scall) |
| 3320 | { |
| 3321 | #ifdef SYS_exit |
| 3322 | if (scall == SYS_exit) |
| 3323 | return 1; |
| 3324 | #endif |
| 3325 | #ifdef DYNAMIC_SYSCALLS |
| 3326 | if (find_syscall (pi, "_exit") == scall) |
| 3327 | return 1; |
| 3328 | #endif |
| 3329 | return 0; |
| 3330 | } |
| 3331 | |
| 3332 | static int |
| 3333 | syscall_is_exec (procinfo *pi, int scall) |
| 3334 | { |
| 3335 | #ifdef SYS_exec |
| 3336 | if (scall == SYS_exec) |
| 3337 | return 1; |
| 3338 | #endif |
| 3339 | #ifdef SYS_execv |
| 3340 | if (scall == SYS_execv) |
| 3341 | return 1; |
| 3342 | #endif |
| 3343 | #ifdef SYS_execve |
| 3344 | if (scall == SYS_execve) |
| 3345 | return 1; |
| 3346 | #endif |
| 3347 | #ifdef DYNAMIC_SYSCALLS |
| 3348 | if (find_syscall (pi, "_execve")) |
| 3349 | return 1; |
| 3350 | if (find_syscall (pi, "ra_execve")) |
| 3351 | return 1; |
| 3352 | #endif |
| 3353 | return 0; |
| 3354 | } |
| 3355 | |
| 3356 | static int |
| 3357 | syscall_is_lwp_create (procinfo *pi, int scall) |
| 3358 | { |
| 3359 | #ifdef SYS_lwp_create |
| 3360 | if (scall == SYS_lwp_create) |
| 3361 | return 1; |
| 3362 | #endif |
| 3363 | #ifdef SYS_lwpcreate |
| 3364 | if (scall == SYS_lwpcreate) |
| 3365 | return 1; |
| 3366 | #endif |
| 3367 | return 0; |
| 3368 | } |
| 3369 | |
| 3370 | #ifdef SYS_syssgi |
| 3371 | /* Return the address of the __dbx_link() function in the file |
| 3372 | refernced by ABFD by scanning its symbol table. Return 0 if |
| 3373 | the symbol was not found. */ |
| 3374 | |
| 3375 | static CORE_ADDR |
| 3376 | dbx_link_addr (bfd *abfd) |
| 3377 | { |
| 3378 | long storage_needed; |
| 3379 | asymbol **symbol_table; |
| 3380 | long number_of_symbols; |
| 3381 | long i; |
| 3382 | |
| 3383 | storage_needed = bfd_get_symtab_upper_bound (abfd); |
| 3384 | if (storage_needed <= 0) |
| 3385 | return 0; |
| 3386 | |
| 3387 | symbol_table = (asymbol **) xmalloc (storage_needed); |
| 3388 | make_cleanup (xfree, symbol_table); |
| 3389 | |
| 3390 | number_of_symbols = bfd_canonicalize_symtab (abfd, symbol_table); |
| 3391 | |
| 3392 | for (i = 0; i < number_of_symbols; i++) |
| 3393 | { |
| 3394 | asymbol *sym = symbol_table[i]; |
| 3395 | |
| 3396 | if ((sym->flags & BSF_GLOBAL) |
| 3397 | && sym->name != NULL && strcmp (sym->name, "__dbx_link") == 0) |
| 3398 | return (sym->value + sym->section->vma); |
| 3399 | } |
| 3400 | |
| 3401 | /* Symbol not found, return NULL. */ |
| 3402 | return 0; |
| 3403 | } |
| 3404 | |
| 3405 | /* Search the symbol table of the file referenced by FD for a symbol |
| 3406 | named __dbx_link(). If found, then insert a breakpoint at this location, |
| 3407 | and return nonzero. Return zero otherwise. */ |
| 3408 | |
| 3409 | static int |
| 3410 | insert_dbx_link_bpt_in_file (int fd, CORE_ADDR ignored) |
| 3411 | { |
| 3412 | bfd *abfd; |
| 3413 | long storage_needed; |
| 3414 | CORE_ADDR sym_addr; |
| 3415 | |
| 3416 | abfd = gdb_bfd_fdopenr ("unamed", 0, fd); |
| 3417 | if (abfd == NULL) |
| 3418 | { |
| 3419 | warning (_("Failed to create a bfd: %s."), bfd_errmsg (bfd_get_error ())); |
| 3420 | return 0; |
| 3421 | } |
| 3422 | |
| 3423 | if (!bfd_check_format (abfd, bfd_object)) |
| 3424 | { |
| 3425 | /* Not the correct format, so we can not possibly find the dbx_link |
| 3426 | symbol in it. */ |
| 3427 | gdb_bfd_unref (abfd); |
| 3428 | return 0; |
| 3429 | } |
| 3430 | |
| 3431 | sym_addr = dbx_link_addr (abfd); |
| 3432 | if (sym_addr != 0) |
| 3433 | { |
| 3434 | struct breakpoint *dbx_link_bpt; |
| 3435 | |
| 3436 | /* Insert the breakpoint. */ |
| 3437 | dbx_link_bpt |
| 3438 | = create_and_insert_solib_event_breakpoint (target_gdbarch (), |
| 3439 | sym_addr); |
| 3440 | if (dbx_link_bpt == NULL) |
| 3441 | { |
| 3442 | warning (_("Failed to insert dbx_link breakpoint.")); |
| 3443 | gdb_bfd_unref (abfd); |
| 3444 | return 0; |
| 3445 | } |
| 3446 | gdb_bfd_unref (abfd); |
| 3447 | return 1; |
| 3448 | } |
| 3449 | |
| 3450 | gdb_bfd_unref (abfd); |
| 3451 | return 0; |
| 3452 | } |
| 3453 | |
| 3454 | /* Calls the supplied callback function once for each mapped address |
| 3455 | space in the process. The callback function receives an open file |
| 3456 | descriptor for the file corresponding to that mapped address space |
| 3457 | (if there is one), and the base address of the mapped space. Quit |
| 3458 | when the callback function returns a nonzero value, or at teh end |
| 3459 | of the mappings. Returns the first non-zero return value of the |
| 3460 | callback function, or zero. */ |
| 3461 | |
| 3462 | static int |
| 3463 | solib_mappings_callback (struct prmap *map, int (*func) (int, CORE_ADDR), |
| 3464 | void *data) |
| 3465 | { |
| 3466 | procinfo *pi = data; |
| 3467 | int fd; |
| 3468 | |
| 3469 | #ifdef NEW_PROC_API |
| 3470 | char name[MAX_PROC_NAME_SIZE + sizeof (map->pr_mapname)]; |
| 3471 | |
| 3472 | if (map->pr_vaddr == 0 && map->pr_size == 0) |
| 3473 | return -1; /* sanity */ |
| 3474 | |
| 3475 | if (map->pr_mapname[0] == 0) |
| 3476 | { |
| 3477 | fd = -1; /* no map file */ |
| 3478 | } |
| 3479 | else |
| 3480 | { |
| 3481 | sprintf (name, "/proc/%d/object/%s", pi->pid, map->pr_mapname); |
| 3482 | /* Note: caller's responsibility to close this fd! */ |
| 3483 | fd = open_with_retry (name, O_RDONLY); |
| 3484 | /* Note: we don't test the above call for failure; |
| 3485 | we just pass the FD on as given. Sometimes there is |
| 3486 | no file, so the open may return failure, but that's |
| 3487 | not a problem. */ |
| 3488 | } |
| 3489 | #else |
| 3490 | fd = ioctl (pi->ctl_fd, PIOCOPENM, &map->pr_vaddr); |
| 3491 | /* Note: we don't test the above call for failure; |
| 3492 | we just pass the FD on as given. Sometimes there is |
| 3493 | no file, so the ioctl may return failure, but that's |
| 3494 | not a problem. */ |
| 3495 | #endif |
| 3496 | return (*func) (fd, (CORE_ADDR) map->pr_vaddr); |
| 3497 | } |
| 3498 | |
| 3499 | /* If the given memory region MAP contains a symbol named __dbx_link, |
| 3500 | insert a breakpoint at this location and return nonzero. Return |
| 3501 | zero otherwise. */ |
| 3502 | |
| 3503 | static int |
| 3504 | insert_dbx_link_bpt_in_region (struct prmap *map, |
| 3505 | find_memory_region_ftype child_func, |
| 3506 | void *data) |
| 3507 | { |
| 3508 | procinfo *pi = (procinfo *) data; |
| 3509 | |
| 3510 | /* We know the symbol we're looking for is in a text region, so |
| 3511 | only look for it if the region is a text one. */ |
| 3512 | if (map->pr_mflags & MA_EXEC) |
| 3513 | return solib_mappings_callback (map, insert_dbx_link_bpt_in_file, pi); |
| 3514 | |
| 3515 | return 0; |
| 3516 | } |
| 3517 | |
| 3518 | /* Search all memory regions for a symbol named __dbx_link. If found, |
| 3519 | insert a breakpoint at its location, and return nonzero. Return zero |
| 3520 | otherwise. */ |
| 3521 | |
| 3522 | static int |
| 3523 | insert_dbx_link_breakpoint (procinfo *pi) |
| 3524 | { |
| 3525 | return iterate_over_mappings (pi, NULL, pi, insert_dbx_link_bpt_in_region); |
| 3526 | } |
| 3527 | #endif |
| 3528 | |
| 3529 | /* Retrieve the next stop event from the child process. If child has |
| 3530 | not stopped yet, wait for it to stop. Translate /proc eventcodes |
| 3531 | (or possibly wait eventcodes) into gdb internal event codes. |
| 3532 | Returns the id of process (and possibly thread) that incurred the |
| 3533 | event. Event codes are returned through a pointer parameter. */ |
| 3534 | |
| 3535 | static ptid_t |
| 3536 | procfs_wait (struct target_ops *ops, |
| 3537 | ptid_t ptid, struct target_waitstatus *status, int options) |
| 3538 | { |
| 3539 | /* First cut: loosely based on original version 2.1. */ |
| 3540 | procinfo *pi; |
| 3541 | int wstat; |
| 3542 | int temp_tid; |
| 3543 | ptid_t retval, temp_ptid; |
| 3544 | int why, what, flags; |
| 3545 | int retry = 0; |
| 3546 | |
| 3547 | wait_again: |
| 3548 | |
| 3549 | retry++; |
| 3550 | wstat = 0; |
| 3551 | retval = pid_to_ptid (-1); |
| 3552 | |
| 3553 | /* Find procinfo for main process. */ |
| 3554 | pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), 0); |
| 3555 | if (pi) |
| 3556 | { |
| 3557 | /* We must assume that the status is stale now... */ |
| 3558 | pi->status_valid = 0; |
| 3559 | pi->gregs_valid = 0; |
| 3560 | pi->fpregs_valid = 0; |
| 3561 | |
| 3562 | #if 0 /* just try this out... */ |
| 3563 | flags = proc_flags (pi); |
| 3564 | why = proc_why (pi); |
| 3565 | if ((flags & PR_STOPPED) && (why == PR_REQUESTED)) |
| 3566 | pi->status_valid = 0; /* re-read again, IMMEDIATELY... */ |
| 3567 | #endif |
| 3568 | /* If child is not stopped, wait for it to stop. */ |
| 3569 | if (!(proc_flags (pi) & (PR_STOPPED | PR_ISTOP)) && |
| 3570 | !proc_wait_for_stop (pi)) |
| 3571 | { |
| 3572 | /* wait_for_stop failed: has the child terminated? */ |
| 3573 | if (errno == ENOENT) |
| 3574 | { |
| 3575 | int wait_retval; |
| 3576 | |
| 3577 | /* /proc file not found; presumably child has terminated. */ |
| 3578 | wait_retval = wait (&wstat); /* "wait" for the child's exit. */ |
| 3579 | |
| 3580 | /* Wrong child? */ |
| 3581 | if (wait_retval != ptid_get_pid (inferior_ptid)) |
| 3582 | error (_("procfs: couldn't stop " |
| 3583 | "process %d: wait returned %d."), |
| 3584 | ptid_get_pid (inferior_ptid), wait_retval); |
| 3585 | /* FIXME: might I not just use waitpid? |
| 3586 | Or try find_procinfo to see if I know about this child? */ |
| 3587 | retval = pid_to_ptid (wait_retval); |
| 3588 | } |
| 3589 | else if (errno == EINTR) |
| 3590 | goto wait_again; |
| 3591 | else |
| 3592 | { |
| 3593 | /* Unknown error from wait_for_stop. */ |
| 3594 | proc_error (pi, "target_wait (wait_for_stop)", __LINE__); |
| 3595 | } |
| 3596 | } |
| 3597 | else |
| 3598 | { |
| 3599 | /* This long block is reached if either: |
| 3600 | a) the child was already stopped, or |
| 3601 | b) we successfully waited for the child with wait_for_stop. |
| 3602 | This block will analyze the /proc status, and translate it |
| 3603 | into a waitstatus for GDB. |
| 3604 | |
| 3605 | If we actually had to call wait because the /proc file |
| 3606 | is gone (child terminated), then we skip this block, |
| 3607 | because we already have a waitstatus. */ |
| 3608 | |
| 3609 | flags = proc_flags (pi); |
| 3610 | why = proc_why (pi); |
| 3611 | what = proc_what (pi); |
| 3612 | |
| 3613 | if (flags & (PR_STOPPED | PR_ISTOP)) |
| 3614 | { |
| 3615 | #ifdef PR_ASYNC |
| 3616 | /* If it's running async (for single_thread control), |
| 3617 | set it back to normal again. */ |
| 3618 | if (flags & PR_ASYNC) |
| 3619 | if (!proc_unset_async (pi)) |
| 3620 | proc_error (pi, "target_wait, unset_async", __LINE__); |
| 3621 | #endif |
| 3622 | |
| 3623 | if (info_verbose) |
| 3624 | proc_prettyprint_why (why, what, 1); |
| 3625 | |
| 3626 | /* The 'pid' we will return to GDB is composed of |
| 3627 | the process ID plus the lwp ID. */ |
| 3628 | retval = ptid_build (pi->pid, proc_get_current_thread (pi), 0); |
| 3629 | |
| 3630 | switch (why) { |
| 3631 | case PR_SIGNALLED: |
| 3632 | wstat = (what << 8) | 0177; |
| 3633 | break; |
| 3634 | case PR_SYSENTRY: |
| 3635 | if (syscall_is_lwp_exit (pi, what)) |
| 3636 | { |
| 3637 | if (print_thread_events) |
| 3638 | printf_unfiltered (_("[%s exited]\n"), |
| 3639 | target_pid_to_str (retval)); |
| 3640 | delete_thread (retval); |
| 3641 | status->kind = TARGET_WAITKIND_SPURIOUS; |
| 3642 | return retval; |
| 3643 | } |
| 3644 | else if (syscall_is_exit (pi, what)) |
| 3645 | { |
| 3646 | struct inferior *inf; |
| 3647 | |
| 3648 | /* Handle SYS_exit call only. */ |
| 3649 | /* Stopped at entry to SYS_exit. |
| 3650 | Make it runnable, resume it, then use |
| 3651 | the wait system call to get its exit code. |
| 3652 | Proc_run_process always clears the current |
| 3653 | fault and signal. |
| 3654 | Then return its exit status. */ |
| 3655 | pi->status_valid = 0; |
| 3656 | wstat = 0; |
| 3657 | /* FIXME: what we should do is return |
| 3658 | TARGET_WAITKIND_SPURIOUS. */ |
| 3659 | if (!proc_run_process (pi, 0, 0)) |
| 3660 | proc_error (pi, "target_wait, run_process", __LINE__); |
| 3661 | |
| 3662 | inf = find_inferior_pid (pi->pid); |
| 3663 | if (inf->attach_flag) |
| 3664 | { |
| 3665 | /* Don't call wait: simulate waiting for exit, |
| 3666 | return a "success" exit code. Bogus: what if |
| 3667 | it returns something else? */ |
| 3668 | wstat = 0; |
| 3669 | retval = inferior_ptid; /* ? ? ? */ |
| 3670 | } |
| 3671 | else |
| 3672 | { |
| 3673 | int temp = wait (&wstat); |
| 3674 | |
| 3675 | /* FIXME: shouldn't I make sure I get the right |
| 3676 | event from the right process? If (for |
| 3677 | instance) I have killed an earlier inferior |
| 3678 | process but failed to clean up after it |
| 3679 | somehow, I could get its termination event |
| 3680 | here. */ |
| 3681 | |
| 3682 | /* If wait returns -1, that's what we return |
| 3683 | to GDB. */ |
| 3684 | if (temp < 0) |
| 3685 | retval = pid_to_ptid (temp); |
| 3686 | } |
| 3687 | } |
| 3688 | else |
| 3689 | { |
| 3690 | printf_filtered (_("procfs: trapped on entry to ")); |
| 3691 | proc_prettyprint_syscall (proc_what (pi), 0); |
| 3692 | printf_filtered ("\n"); |
| 3693 | #ifndef PIOCSSPCACT |
| 3694 | { |
| 3695 | long i, nsysargs, *sysargs; |
| 3696 | |
| 3697 | if ((nsysargs = proc_nsysarg (pi)) > 0 && |
| 3698 | (sysargs = proc_sysargs (pi)) != NULL) |
| 3699 | { |
| 3700 | printf_filtered (_("%ld syscall arguments:\n"), |
| 3701 | nsysargs); |
| 3702 | for (i = 0; i < nsysargs; i++) |
| 3703 | printf_filtered ("#%ld: 0x%08lx\n", |
| 3704 | i, sysargs[i]); |
| 3705 | } |
| 3706 | |
| 3707 | } |
| 3708 | #endif |
| 3709 | if (status) |
| 3710 | { |
| 3711 | /* How to exit gracefully, returning "unknown |
| 3712 | event". */ |
| 3713 | status->kind = TARGET_WAITKIND_SPURIOUS; |
| 3714 | return inferior_ptid; |
| 3715 | } |
| 3716 | else |
| 3717 | { |
| 3718 | /* How to keep going without returning to wfi: */ |
| 3719 | target_resume (ptid, 0, GDB_SIGNAL_0); |
| 3720 | goto wait_again; |
| 3721 | } |
| 3722 | } |
| 3723 | break; |
| 3724 | case PR_SYSEXIT: |
| 3725 | if (syscall_is_exec (pi, what)) |
| 3726 | { |
| 3727 | /* Hopefully this is our own "fork-child" execing |
| 3728 | the real child. Hoax this event into a trap, and |
| 3729 | GDB will see the child about to execute its start |
| 3730 | address. */ |
| 3731 | wstat = (SIGTRAP << 8) | 0177; |
| 3732 | } |
| 3733 | #ifdef SYS_syssgi |
| 3734 | else if (what == SYS_syssgi) |
| 3735 | { |
| 3736 | /* see if we can break on dbx_link(). If yes, then |
| 3737 | we no longer need the SYS_syssgi notifications. */ |
| 3738 | if (insert_dbx_link_breakpoint (pi)) |
| 3739 | proc_trace_syscalls_1 (pi, SYS_syssgi, PR_SYSEXIT, |
| 3740 | FLAG_RESET, 0); |
| 3741 | |
| 3742 | /* This is an internal event and should be transparent |
| 3743 | to wfi, so resume the execution and wait again. See |
| 3744 | comment in procfs_init_inferior() for more details. */ |
| 3745 | target_resume (ptid, 0, GDB_SIGNAL_0); |
| 3746 | goto wait_again; |
| 3747 | } |
| 3748 | #endif |
| 3749 | else if (syscall_is_lwp_create (pi, what)) |
| 3750 | { |
| 3751 | /* This syscall is somewhat like fork/exec. We |
| 3752 | will get the event twice: once for the parent |
| 3753 | LWP, and once for the child. We should already |
| 3754 | know about the parent LWP, but the child will |
| 3755 | be new to us. So, whenever we get this event, |
| 3756 | if it represents a new thread, simply add the |
| 3757 | thread to the list. */ |
| 3758 | |
| 3759 | /* If not in procinfo list, add it. */ |
| 3760 | temp_tid = proc_get_current_thread (pi); |
| 3761 | if (!find_procinfo (pi->pid, temp_tid)) |
| 3762 | create_procinfo (pi->pid, temp_tid); |
| 3763 | |
| 3764 | temp_ptid = ptid_build (pi->pid, temp_tid, 0); |
| 3765 | /* If not in GDB's thread list, add it. */ |
| 3766 | if (!in_thread_list (temp_ptid)) |
| 3767 | add_thread (temp_ptid); |
| 3768 | |
| 3769 | /* Return to WFI, but tell it to immediately resume. */ |
| 3770 | status->kind = TARGET_WAITKIND_SPURIOUS; |
| 3771 | return inferior_ptid; |
| 3772 | } |
| 3773 | else if (syscall_is_lwp_exit (pi, what)) |
| 3774 | { |
| 3775 | if (print_thread_events) |
| 3776 | printf_unfiltered (_("[%s exited]\n"), |
| 3777 | target_pid_to_str (retval)); |
| 3778 | delete_thread (retval); |
| 3779 | status->kind = TARGET_WAITKIND_SPURIOUS; |
| 3780 | return retval; |
| 3781 | } |
| 3782 | else if (0) |
| 3783 | { |
| 3784 | /* FIXME: Do we need to handle SYS_sproc, |
| 3785 | SYS_fork, or SYS_vfork here? The old procfs |
| 3786 | seemed to use this event to handle threads on |
| 3787 | older (non-LWP) systems, where I'm assuming |
| 3788 | that threads were actually separate processes. |
| 3789 | Irix, maybe? Anyway, low priority for now. */ |
| 3790 | } |
| 3791 | else |
| 3792 | { |
| 3793 | printf_filtered (_("procfs: trapped on exit from ")); |
| 3794 | proc_prettyprint_syscall (proc_what (pi), 0); |
| 3795 | printf_filtered ("\n"); |
| 3796 | #ifndef PIOCSSPCACT |
| 3797 | { |
| 3798 | long i, nsysargs, *sysargs; |
| 3799 | |
| 3800 | if ((nsysargs = proc_nsysarg (pi)) > 0 && |
| 3801 | (sysargs = proc_sysargs (pi)) != NULL) |
| 3802 | { |
| 3803 | printf_filtered (_("%ld syscall arguments:\n"), |
| 3804 | nsysargs); |
| 3805 | for (i = 0; i < nsysargs; i++) |
| 3806 | printf_filtered ("#%ld: 0x%08lx\n", |
| 3807 | i, sysargs[i]); |
| 3808 | } |
| 3809 | } |
| 3810 | #endif |
| 3811 | status->kind = TARGET_WAITKIND_SPURIOUS; |
| 3812 | return inferior_ptid; |
| 3813 | } |
| 3814 | break; |
| 3815 | case PR_REQUESTED: |
| 3816 | #if 0 /* FIXME */ |
| 3817 | wstat = (SIGSTOP << 8) | 0177; |
| 3818 | break; |
| 3819 | #else |
| 3820 | if (retry < 5) |
| 3821 | { |
| 3822 | printf_filtered (_("Retry #%d:\n"), retry); |
| 3823 | pi->status_valid = 0; |
| 3824 | goto wait_again; |
| 3825 | } |
| 3826 | else |
| 3827 | { |
| 3828 | /* If not in procinfo list, add it. */ |
| 3829 | temp_tid = proc_get_current_thread (pi); |
| 3830 | if (!find_procinfo (pi->pid, temp_tid)) |
| 3831 | create_procinfo (pi->pid, temp_tid); |
| 3832 | |
| 3833 | /* If not in GDB's thread list, add it. */ |
| 3834 | temp_ptid = ptid_build (pi->pid, temp_tid, 0); |
| 3835 | if (!in_thread_list (temp_ptid)) |
| 3836 | add_thread (temp_ptid); |
| 3837 | |
| 3838 | status->kind = TARGET_WAITKIND_STOPPED; |
| 3839 | status->value.sig = 0; |
| 3840 | return retval; |
| 3841 | } |
| 3842 | #endif |
| 3843 | case PR_JOBCONTROL: |
| 3844 | wstat = (what << 8) | 0177; |
| 3845 | break; |
| 3846 | case PR_FAULTED: |
| 3847 | switch (what) { |
| 3848 | #ifdef FLTWATCH |
| 3849 | case FLTWATCH: |
| 3850 | wstat = (SIGTRAP << 8) | 0177; |
| 3851 | break; |
| 3852 | #endif |
| 3853 | #ifdef FLTKWATCH |
| 3854 | case FLTKWATCH: |
| 3855 | wstat = (SIGTRAP << 8) | 0177; |
| 3856 | break; |
| 3857 | #endif |
| 3858 | /* FIXME: use si_signo where possible. */ |
| 3859 | case FLTPRIV: |
| 3860 | #if (FLTILL != FLTPRIV) /* Avoid "duplicate case" error. */ |
| 3861 | case FLTILL: |
| 3862 | #endif |
| 3863 | wstat = (SIGILL << 8) | 0177; |
| 3864 | break; |
| 3865 | case FLTBPT: |
| 3866 | #if (FLTTRACE != FLTBPT) /* Avoid "duplicate case" error. */ |
| 3867 | case FLTTRACE: |
| 3868 | #endif |
| 3869 | wstat = (SIGTRAP << 8) | 0177; |
| 3870 | break; |
| 3871 | case FLTSTACK: |
| 3872 | case FLTACCESS: |
| 3873 | #if (FLTBOUNDS != FLTSTACK) /* Avoid "duplicate case" error. */ |
| 3874 | case FLTBOUNDS: |
| 3875 | #endif |
| 3876 | wstat = (SIGSEGV << 8) | 0177; |
| 3877 | break; |
| 3878 | case FLTIOVF: |
| 3879 | case FLTIZDIV: |
| 3880 | #if (FLTFPE != FLTIOVF) /* Avoid "duplicate case" error. */ |
| 3881 | case FLTFPE: |
| 3882 | #endif |
| 3883 | wstat = (SIGFPE << 8) | 0177; |
| 3884 | break; |
| 3885 | case FLTPAGE: /* Recoverable page fault */ |
| 3886 | default: /* FIXME: use si_signo if possible for |
| 3887 | fault. */ |
| 3888 | retval = pid_to_ptid (-1); |
| 3889 | printf_filtered ("procfs:%d -- ", __LINE__); |
| 3890 | printf_filtered (_("child stopped for unknown reason:\n")); |
| 3891 | proc_prettyprint_why (why, what, 1); |
| 3892 | error (_("... giving up...")); |
| 3893 | break; |
| 3894 | } |
| 3895 | break; /* case PR_FAULTED: */ |
| 3896 | default: /* switch (why) unmatched */ |
| 3897 | printf_filtered ("procfs:%d -- ", __LINE__); |
| 3898 | printf_filtered (_("child stopped for unknown reason:\n")); |
| 3899 | proc_prettyprint_why (why, what, 1); |
| 3900 | error (_("... giving up...")); |
| 3901 | break; |
| 3902 | } |
| 3903 | /* Got this far without error: If retval isn't in the |
| 3904 | threads database, add it. */ |
| 3905 | if (ptid_get_pid (retval) > 0 && |
| 3906 | !ptid_equal (retval, inferior_ptid) && |
| 3907 | !in_thread_list (retval)) |
| 3908 | { |
| 3909 | /* We have a new thread. We need to add it both to |
| 3910 | GDB's list and to our own. If we don't create a |
| 3911 | procinfo, resume may be unhappy later. */ |
| 3912 | add_thread (retval); |
| 3913 | if (find_procinfo (ptid_get_pid (retval), |
| 3914 | ptid_get_lwp (retval)) == NULL) |
| 3915 | create_procinfo (ptid_get_pid (retval), |
| 3916 | ptid_get_lwp (retval)); |
| 3917 | } |
| 3918 | } |
| 3919 | else /* Flags do not indicate STOPPED. */ |
| 3920 | { |
| 3921 | /* surely this can't happen... */ |
| 3922 | printf_filtered ("procfs:%d -- process not stopped.\n", |
| 3923 | __LINE__); |
| 3924 | proc_prettyprint_flags (flags, 1); |
| 3925 | error (_("procfs: ...giving up...")); |
| 3926 | } |
| 3927 | } |
| 3928 | |
| 3929 | if (status) |
| 3930 | store_waitstatus (status, wstat); |
| 3931 | } |
| 3932 | |
| 3933 | return retval; |
| 3934 | } |
| 3935 | |
| 3936 | /* Perform a partial transfer to/from the specified object. For |
| 3937 | memory transfers, fall back to the old memory xfer functions. */ |
| 3938 | |
| 3939 | static enum target_xfer_status |
| 3940 | procfs_xfer_partial (struct target_ops *ops, enum target_object object, |
| 3941 | const char *annex, gdb_byte *readbuf, |
| 3942 | const gdb_byte *writebuf, ULONGEST offset, ULONGEST len, |
| 3943 | ULONGEST *xfered_len) |
| 3944 | { |
| 3945 | switch (object) |
| 3946 | { |
| 3947 | case TARGET_OBJECT_MEMORY: |
| 3948 | return procfs_xfer_memory (readbuf, writebuf, offset, len, xfered_len); |
| 3949 | |
| 3950 | #ifdef NEW_PROC_API |
| 3951 | case TARGET_OBJECT_AUXV: |
| 3952 | return memory_xfer_auxv (ops, object, annex, readbuf, writebuf, |
| 3953 | offset, len, xfered_len); |
| 3954 | #endif |
| 3955 | |
| 3956 | default: |
| 3957 | return ops->beneath->to_xfer_partial (ops->beneath, object, annex, |
| 3958 | readbuf, writebuf, offset, len, |
| 3959 | xfered_len); |
| 3960 | } |
| 3961 | } |
| 3962 | |
| 3963 | /* Helper for procfs_xfer_partial that handles memory transfers. |
| 3964 | Arguments are like target_xfer_partial. */ |
| 3965 | |
| 3966 | static enum target_xfer_status |
| 3967 | procfs_xfer_memory (gdb_byte *readbuf, const gdb_byte *writebuf, |
| 3968 | ULONGEST memaddr, ULONGEST len, ULONGEST *xfered_len) |
| 3969 | { |
| 3970 | procinfo *pi; |
| 3971 | int nbytes; |
| 3972 | |
| 3973 | /* Find procinfo for main process. */ |
| 3974 | pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), 0); |
| 3975 | if (pi->as_fd == 0 && |
| 3976 | open_procinfo_files (pi, FD_AS) == 0) |
| 3977 | { |
| 3978 | proc_warn (pi, "xfer_memory, open_proc_files", __LINE__); |
| 3979 | return TARGET_XFER_E_IO; |
| 3980 | } |
| 3981 | |
| 3982 | if (lseek (pi->as_fd, (off_t) memaddr, SEEK_SET) != (off_t) memaddr) |
| 3983 | return TARGET_XFER_E_IO; |
| 3984 | |
| 3985 | if (writebuf != NULL) |
| 3986 | { |
| 3987 | PROCFS_NOTE ("write memory:\n"); |
| 3988 | nbytes = write (pi->as_fd, writebuf, len); |
| 3989 | } |
| 3990 | else |
| 3991 | { |
| 3992 | PROCFS_NOTE ("read memory:\n"); |
| 3993 | nbytes = read (pi->as_fd, readbuf, len); |
| 3994 | } |
| 3995 | if (nbytes <= 0) |
| 3996 | return TARGET_XFER_E_IO; |
| 3997 | *xfered_len = nbytes; |
| 3998 | return TARGET_XFER_OK; |
| 3999 | } |
| 4000 | |
| 4001 | /* Called by target_resume before making child runnable. Mark cached |
| 4002 | registers and status's invalid. If there are "dirty" caches that |
| 4003 | need to be written back to the child process, do that. |
| 4004 | |
| 4005 | File descriptors are also cached. As they are a limited resource, |
| 4006 | we cannot hold onto them indefinitely. However, as they are |
| 4007 | expensive to open, we don't want to throw them away |
| 4008 | indescriminately either. As a compromise, we will keep the file |
| 4009 | descriptors for the parent process, but discard any file |
| 4010 | descriptors we may have accumulated for the threads. |
| 4011 | |
| 4012 | As this function is called by iterate_over_threads, it always |
| 4013 | returns zero (so that iterate_over_threads will keep |
| 4014 | iterating). */ |
| 4015 | |
| 4016 | static int |
| 4017 | invalidate_cache (procinfo *parent, procinfo *pi, void *ptr) |
| 4018 | { |
| 4019 | /* About to run the child; invalidate caches and do any other |
| 4020 | cleanup. */ |
| 4021 | |
| 4022 | #if 0 |
| 4023 | if (pi->gregs_dirty) |
| 4024 | if (parent == NULL || |
| 4025 | proc_get_current_thread (parent) != pi->tid) |
| 4026 | if (!proc_set_gregs (pi)) /* flush gregs cache */ |
| 4027 | proc_warn (pi, "target_resume, set_gregs", |
| 4028 | __LINE__); |
| 4029 | if (gdbarch_fp0_regnum (target_gdbarch ()) >= 0) |
| 4030 | if (pi->fpregs_dirty) |
| 4031 | if (parent == NULL || |
| 4032 | proc_get_current_thread (parent) != pi->tid) |
| 4033 | if (!proc_set_fpregs (pi)) /* flush fpregs cache */ |
| 4034 | proc_warn (pi, "target_resume, set_fpregs", |
| 4035 | __LINE__); |
| 4036 | #endif |
| 4037 | |
| 4038 | if (parent != NULL) |
| 4039 | { |
| 4040 | /* The presence of a parent indicates that this is an LWP. |
| 4041 | Close any file descriptors that it might have open. |
| 4042 | We don't do this to the master (parent) procinfo. */ |
| 4043 | |
| 4044 | close_procinfo_files (pi); |
| 4045 | } |
| 4046 | pi->gregs_valid = 0; |
| 4047 | pi->fpregs_valid = 0; |
| 4048 | #if 0 |
| 4049 | pi->gregs_dirty = 0; |
| 4050 | pi->fpregs_dirty = 0; |
| 4051 | #endif |
| 4052 | pi->status_valid = 0; |
| 4053 | pi->threads_valid = 0; |
| 4054 | |
| 4055 | return 0; |
| 4056 | } |
| 4057 | |
| 4058 | #if 0 |
| 4059 | /* A callback function for iterate_over_threads. Find the |
| 4060 | asynchronous signal thread, and make it runnable. See if that |
| 4061 | helps matters any. */ |
| 4062 | |
| 4063 | static int |
| 4064 | make_signal_thread_runnable (procinfo *process, procinfo *pi, void *ptr) |
| 4065 | { |
| 4066 | #ifdef PR_ASLWP |
| 4067 | if (proc_flags (pi) & PR_ASLWP) |
| 4068 | { |
| 4069 | if (!proc_run_process (pi, 0, -1)) |
| 4070 | proc_error (pi, "make_signal_thread_runnable", __LINE__); |
| 4071 | return 1; |
| 4072 | } |
| 4073 | #endif |
| 4074 | return 0; |
| 4075 | } |
| 4076 | #endif |
| 4077 | |
| 4078 | /* Make the child process runnable. Normally we will then call |
| 4079 | procfs_wait and wait for it to stop again (unless gdb is async). |
| 4080 | |
| 4081 | If STEP is true, then arrange for the child to stop again after |
| 4082 | executing a single instruction. If SIGNO is zero, then cancel any |
| 4083 | pending signal; if non-zero, then arrange for the indicated signal |
| 4084 | to be delivered to the child when it runs. If PID is -1, then |
| 4085 | allow any child thread to run; if non-zero, then allow only the |
| 4086 | indicated thread to run. (not implemented yet). */ |
| 4087 | |
| 4088 | static void |
| 4089 | procfs_resume (struct target_ops *ops, |
| 4090 | ptid_t ptid, int step, enum gdb_signal signo) |
| 4091 | { |
| 4092 | procinfo *pi, *thread; |
| 4093 | int native_signo; |
| 4094 | |
| 4095 | /* 2.1: |
| 4096 | prrun.prflags |= PRSVADDR; |
| 4097 | prrun.pr_vaddr = $PC; set resume address |
| 4098 | prrun.prflags |= PRSTRACE; trace signals in pr_trace (all) |
| 4099 | prrun.prflags |= PRSFAULT; trace faults in pr_fault (all but PAGE) |
| 4100 | prrun.prflags |= PRCFAULT; clear current fault. |
| 4101 | |
| 4102 | PRSTRACE and PRSFAULT can be done by other means |
| 4103 | (proc_trace_signals, proc_trace_faults) |
| 4104 | PRSVADDR is unnecessary. |
| 4105 | PRCFAULT may be replaced by a PIOCCFAULT call (proc_clear_current_fault) |
| 4106 | This basically leaves PRSTEP and PRCSIG. |
| 4107 | PRCSIG is like PIOCSSIG (proc_clear_current_signal). |
| 4108 | So basically PR_STEP is the sole argument that must be passed |
| 4109 | to proc_run_process (for use in the prrun struct by ioctl). */ |
| 4110 | |
| 4111 | /* Find procinfo for main process. */ |
| 4112 | pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), 0); |
| 4113 | |
| 4114 | /* First cut: ignore pid argument. */ |
| 4115 | errno = 0; |
| 4116 | |
| 4117 | /* Convert signal to host numbering. */ |
| 4118 | if (signo == 0 || |
| 4119 | (signo == GDB_SIGNAL_STOP && pi->ignore_next_sigstop)) |
| 4120 | native_signo = 0; |
| 4121 | else |
| 4122 | native_signo = gdb_signal_to_host (signo); |
| 4123 | |
| 4124 | pi->ignore_next_sigstop = 0; |
| 4125 | |
| 4126 | /* Running the process voids all cached registers and status. */ |
| 4127 | /* Void the threads' caches first. */ |
| 4128 | proc_iterate_over_threads (pi, invalidate_cache, NULL); |
| 4129 | /* Void the process procinfo's caches. */ |
| 4130 | invalidate_cache (NULL, pi, NULL); |
| 4131 | |
| 4132 | if (ptid_get_pid (ptid) != -1) |
| 4133 | { |
| 4134 | /* Resume a specific thread, presumably suppressing the |
| 4135 | others. */ |
| 4136 | thread = find_procinfo (ptid_get_pid (ptid), ptid_get_lwp (ptid)); |
| 4137 | if (thread != NULL) |
| 4138 | { |
| 4139 | if (thread->tid != 0) |
| 4140 | { |
| 4141 | /* We're to resume a specific thread, and not the |
| 4142 | others. Set the child process's PR_ASYNC flag. */ |
| 4143 | #ifdef PR_ASYNC |
| 4144 | if (!proc_set_async (pi)) |
| 4145 | proc_error (pi, "target_resume, set_async", __LINE__); |
| 4146 | #endif |
| 4147 | #if 0 |
| 4148 | proc_iterate_over_threads (pi, |
| 4149 | make_signal_thread_runnable, |
| 4150 | NULL); |
| 4151 | #endif |
| 4152 | pi = thread; /* Substitute the thread's procinfo |
| 4153 | for run. */ |
| 4154 | } |
| 4155 | } |
| 4156 | } |
| 4157 | |
| 4158 | if (!proc_run_process (pi, step, native_signo)) |
| 4159 | { |
| 4160 | if (errno == EBUSY) |
| 4161 | warning (_("resume: target already running. " |
| 4162 | "Pretend to resume, and hope for the best!")); |
| 4163 | else |
| 4164 | proc_error (pi, "target_resume", __LINE__); |
| 4165 | } |
| 4166 | } |
| 4167 | |
| 4168 | /* Set up to trace signals in the child process. */ |
| 4169 | |
| 4170 | static void |
| 4171 | procfs_pass_signals (struct target_ops *self, |
| 4172 | int numsigs, unsigned char *pass_signals) |
| 4173 | { |
| 4174 | gdb_sigset_t signals; |
| 4175 | procinfo *pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), 0); |
| 4176 | int signo; |
| 4177 | |
| 4178 | prfillset (&signals); |
| 4179 | |
| 4180 | for (signo = 0; signo < NSIG; signo++) |
| 4181 | { |
| 4182 | int target_signo = gdb_signal_from_host (signo); |
| 4183 | if (target_signo < numsigs && pass_signals[target_signo]) |
| 4184 | gdb_prdelset (&signals, signo); |
| 4185 | } |
| 4186 | |
| 4187 | if (!proc_set_traced_signals (pi, &signals)) |
| 4188 | proc_error (pi, "pass_signals", __LINE__); |
| 4189 | } |
| 4190 | |
| 4191 | /* Print status information about the child process. */ |
| 4192 | |
| 4193 | static void |
| 4194 | procfs_files_info (struct target_ops *ignore) |
| 4195 | { |
| 4196 | struct inferior *inf = current_inferior (); |
| 4197 | |
| 4198 | printf_filtered (_("\tUsing the running image of %s %s via /proc.\n"), |
| 4199 | inf->attach_flag? "attached": "child", |
| 4200 | target_pid_to_str (inferior_ptid)); |
| 4201 | } |
| 4202 | |
| 4203 | /* Stop the child process asynchronously, as when the gdb user types |
| 4204 | control-c or presses a "stop" button. Works by sending |
| 4205 | kill(SIGINT) to the child's process group. */ |
| 4206 | |
| 4207 | static void |
| 4208 | procfs_interrupt (struct target_ops *self, ptid_t ptid) |
| 4209 | { |
| 4210 | kill (-inferior_process_group (), SIGINT); |
| 4211 | } |
| 4212 | |
| 4213 | /* Make it die. Wait for it to die. Clean up after it. Note: this |
| 4214 | should only be applied to the real process, not to an LWP, because |
| 4215 | of the check for parent-process. If we need this to work for an |
| 4216 | LWP, it needs some more logic. */ |
| 4217 | |
| 4218 | static void |
| 4219 | unconditionally_kill_inferior (procinfo *pi) |
| 4220 | { |
| 4221 | int parent_pid; |
| 4222 | |
| 4223 | parent_pid = proc_parent_pid (pi); |
| 4224 | #ifdef PROCFS_NEED_PIOCSSIG_FOR_KILL |
| 4225 | /* Alpha OSF/1-2.x procfs needs a PIOCSSIG call with a SIGKILL signal |
| 4226 | to kill the inferior, otherwise it might remain stopped with a |
| 4227 | pending SIGKILL. |
| 4228 | We do not check the result of the PIOCSSIG, the inferior might have |
| 4229 | died already. */ |
| 4230 | { |
| 4231 | gdb_siginfo_t newsiginfo; |
| 4232 | |
| 4233 | memset ((char *) &newsiginfo, 0, sizeof (newsiginfo)); |
| 4234 | newsiginfo.si_signo = SIGKILL; |
| 4235 | newsiginfo.si_code = 0; |
| 4236 | newsiginfo.si_errno = 0; |
| 4237 | newsiginfo.si_pid = getpid (); |
| 4238 | newsiginfo.si_uid = getuid (); |
| 4239 | /* FIXME: use proc_set_current_signal. */ |
| 4240 | ioctl (pi->ctl_fd, PIOCSSIG, &newsiginfo); |
| 4241 | } |
| 4242 | #else /* PROCFS_NEED_PIOCSSIG_FOR_KILL */ |
| 4243 | if (!proc_kill (pi, SIGKILL)) |
| 4244 | proc_error (pi, "unconditionally_kill, proc_kill", __LINE__); |
| 4245 | #endif /* PROCFS_NEED_PIOCSSIG_FOR_KILL */ |
| 4246 | destroy_procinfo (pi); |
| 4247 | |
| 4248 | /* If pi is GDB's child, wait for it to die. */ |
| 4249 | if (parent_pid == getpid ()) |
| 4250 | /* FIXME: should we use waitpid to make sure we get the right event? |
| 4251 | Should we check the returned event? */ |
| 4252 | { |
| 4253 | #if 0 |
| 4254 | int status, ret; |
| 4255 | |
| 4256 | ret = waitpid (pi->pid, &status, 0); |
| 4257 | #else |
| 4258 | wait (NULL); |
| 4259 | #endif |
| 4260 | } |
| 4261 | } |
| 4262 | |
| 4263 | /* We're done debugging it, and we want it to go away. Then we want |
| 4264 | GDB to forget all about it. */ |
| 4265 | |
| 4266 | static void |
| 4267 | procfs_kill_inferior (struct target_ops *ops) |
| 4268 | { |
| 4269 | if (!ptid_equal (inferior_ptid, null_ptid)) /* ? */ |
| 4270 | { |
| 4271 | /* Find procinfo for main process. */ |
| 4272 | procinfo *pi = find_procinfo (ptid_get_pid (inferior_ptid), 0); |
| 4273 | |
| 4274 | if (pi) |
| 4275 | unconditionally_kill_inferior (pi); |
| 4276 | target_mourn_inferior (); |
| 4277 | } |
| 4278 | } |
| 4279 | |
| 4280 | /* Forget we ever debugged this thing! */ |
| 4281 | |
| 4282 | static void |
| 4283 | procfs_mourn_inferior (struct target_ops *ops) |
| 4284 | { |
| 4285 | procinfo *pi; |
| 4286 | |
| 4287 | if (!ptid_equal (inferior_ptid, null_ptid)) |
| 4288 | { |
| 4289 | /* Find procinfo for main process. */ |
| 4290 | pi = find_procinfo (ptid_get_pid (inferior_ptid), 0); |
| 4291 | if (pi) |
| 4292 | destroy_procinfo (pi); |
| 4293 | } |
| 4294 | |
| 4295 | generic_mourn_inferior (); |
| 4296 | |
| 4297 | inf_child_maybe_unpush_target (ops); |
| 4298 | } |
| 4299 | |
| 4300 | /* When GDB forks to create a runnable inferior process, this function |
| 4301 | is called on the parent side of the fork. It's job is to do |
| 4302 | whatever is necessary to make the child ready to be debugged, and |
| 4303 | then wait for the child to synchronize. */ |
| 4304 | |
| 4305 | static void |
| 4306 | procfs_init_inferior (struct target_ops *ops, int pid) |
| 4307 | { |
| 4308 | procinfo *pi; |
| 4309 | gdb_sigset_t signals; |
| 4310 | int fail; |
| 4311 | int lwpid; |
| 4312 | |
| 4313 | /* This routine called on the parent side (GDB side) |
| 4314 | after GDB forks the inferior. */ |
| 4315 | if (!target_is_pushed (ops)) |
| 4316 | push_target (ops); |
| 4317 | |
| 4318 | if ((pi = create_procinfo (pid, 0)) == NULL) |
| 4319 | perror (_("procfs: out of memory in 'init_inferior'")); |
| 4320 | |
| 4321 | if (!open_procinfo_files (pi, FD_CTL)) |
| 4322 | proc_error (pi, "init_inferior, open_proc_files", __LINE__); |
| 4323 | |
| 4324 | /* |
| 4325 | xmalloc // done |
| 4326 | open_procinfo_files // done |
| 4327 | link list // done |
| 4328 | prfillset (trace) |
| 4329 | procfs_notice_signals |
| 4330 | prfillset (fault) |
| 4331 | prdelset (FLTPAGE) |
| 4332 | PIOCWSTOP |
| 4333 | PIOCSFAULT |
| 4334 | */ |
| 4335 | |
| 4336 | /* If not stopped yet, wait for it to stop. */ |
| 4337 | if (!(proc_flags (pi) & PR_STOPPED) && |
| 4338 | !(proc_wait_for_stop (pi))) |
| 4339 | dead_procinfo (pi, "init_inferior: wait_for_stop failed", KILL); |
| 4340 | |
| 4341 | /* Save some of the /proc state to be restored if we detach. */ |
| 4342 | /* FIXME: Why? In case another debugger was debugging it? |
| 4343 | We're it's parent, for Ghu's sake! */ |
| 4344 | if (!proc_get_traced_signals (pi, &pi->saved_sigset)) |
| 4345 | proc_error (pi, "init_inferior, get_traced_signals", __LINE__); |
| 4346 | if (!proc_get_held_signals (pi, &pi->saved_sighold)) |
| 4347 | proc_error (pi, "init_inferior, get_held_signals", __LINE__); |
| 4348 | if (!proc_get_traced_faults (pi, &pi->saved_fltset)) |
| 4349 | proc_error (pi, "init_inferior, get_traced_faults", __LINE__); |
| 4350 | if (!proc_get_traced_sysentry (pi, pi->saved_entryset)) |
| 4351 | proc_error (pi, "init_inferior, get_traced_sysentry", __LINE__); |
| 4352 | if (!proc_get_traced_sysexit (pi, pi->saved_exitset)) |
| 4353 | proc_error (pi, "init_inferior, get_traced_sysexit", __LINE__); |
| 4354 | |
| 4355 | if ((fail = procfs_debug_inferior (pi)) != 0) |
| 4356 | proc_error (pi, "init_inferior (procfs_debug_inferior)", fail); |
| 4357 | |
| 4358 | /* FIXME: logically, we should really be turning OFF run-on-last-close, |
| 4359 | and possibly even turning ON kill-on-last-close at this point. But |
| 4360 | I can't make that change without careful testing which I don't have |
| 4361 | time to do right now... */ |
| 4362 | /* Turn on run-on-last-close flag so that the child |
| 4363 | will die if GDB goes away for some reason. */ |
| 4364 | if (!proc_set_run_on_last_close (pi)) |
| 4365 | proc_error (pi, "init_inferior, set_RLC", __LINE__); |
| 4366 | |
| 4367 | /* We now have have access to the lwpid of the main thread/lwp. */ |
| 4368 | lwpid = proc_get_current_thread (pi); |
| 4369 | |
| 4370 | /* Create a procinfo for the main lwp. */ |
| 4371 | create_procinfo (pid, lwpid); |
| 4372 | |
| 4373 | /* We already have a main thread registered in the thread table at |
| 4374 | this point, but it didn't have any lwp info yet. Notify the core |
| 4375 | about it. This changes inferior_ptid as well. */ |
| 4376 | thread_change_ptid (pid_to_ptid (pid), |
| 4377 | ptid_build (pid, lwpid, 0)); |
| 4378 | |
| 4379 | startup_inferior (START_INFERIOR_TRAPS_EXPECTED); |
| 4380 | |
| 4381 | #ifdef SYS_syssgi |
| 4382 | /* On mips-irix, we need to stop the inferior early enough during |
| 4383 | the startup phase in order to be able to load the shared library |
| 4384 | symbols and insert the breakpoints that are located in these shared |
| 4385 | libraries. Stopping at the program entry point is not good enough |
| 4386 | because the -init code is executed before the execution reaches |
| 4387 | that point. |
| 4388 | |
| 4389 | So what we need to do is to insert a breakpoint in the runtime |
| 4390 | loader (rld), more precisely in __dbx_link(). This procedure is |
| 4391 | called by rld once all shared libraries have been mapped, but before |
| 4392 | the -init code is executed. Unfortuantely, this is not straightforward, |
| 4393 | as rld is not part of the executable we are running, and thus we need |
| 4394 | the inferior to run until rld itself has been mapped in memory. |
| 4395 | |
| 4396 | For this, we trace all syssgi() syscall exit events. Each time |
| 4397 | we detect such an event, we iterate over each text memory maps, |
| 4398 | get its associated fd, and scan the symbol table for __dbx_link(). |
| 4399 | When found, we know that rld has been mapped, and that we can insert |
| 4400 | the breakpoint at the symbol address. Once the dbx_link() breakpoint |
| 4401 | has been inserted, the syssgi() notifications are no longer necessary, |
| 4402 | so they should be canceled. */ |
| 4403 | proc_trace_syscalls_1 (pi, SYS_syssgi, PR_SYSEXIT, FLAG_SET, 0); |
| 4404 | #endif |
| 4405 | } |
| 4406 | |
| 4407 | /* When GDB forks to create a new process, this function is called on |
| 4408 | the child side of the fork before GDB exec's the user program. Its |
| 4409 | job is to make the child minimally debuggable, so that the parent |
| 4410 | GDB process can connect to the child and take over. This function |
| 4411 | should do only the minimum to make that possible, and to |
| 4412 | synchronize with the parent process. The parent process should |
| 4413 | take care of the details. */ |
| 4414 | |
| 4415 | static void |
| 4416 | procfs_set_exec_trap (void) |
| 4417 | { |
| 4418 | /* This routine called on the child side (inferior side) |
| 4419 | after GDB forks the inferior. It must use only local variables, |
| 4420 | because it may be sharing data space with its parent. */ |
| 4421 | |
| 4422 | procinfo *pi; |
| 4423 | sysset_t *exitset; |
| 4424 | |
| 4425 | if ((pi = create_procinfo (getpid (), 0)) == NULL) |
| 4426 | perror_with_name (_("procfs: create_procinfo failed in child.")); |
| 4427 | |
| 4428 | if (open_procinfo_files (pi, FD_CTL) == 0) |
| 4429 | { |
| 4430 | proc_warn (pi, "set_exec_trap, open_proc_files", __LINE__); |
| 4431 | gdb_flush (gdb_stderr); |
| 4432 | /* No need to call "dead_procinfo", because we're going to |
| 4433 | exit. */ |
| 4434 | _exit (127); |
| 4435 | } |
| 4436 | |
| 4437 | #ifdef PRFS_STOPEXEC /* defined on OSF */ |
| 4438 | /* OSF method for tracing exec syscalls. Quoting: |
| 4439 | Under Alpha OSF/1 we have to use a PIOCSSPCACT ioctl to trace |
| 4440 | exits from exec system calls because of the user level loader. */ |
| 4441 | /* FIXME: make nice and maybe move into an access function. */ |
| 4442 | { |
| 4443 | int prfs_flags; |
| 4444 | |
| 4445 | if (ioctl (pi->ctl_fd, PIOCGSPCACT, &prfs_flags) < 0) |
| 4446 | { |
| 4447 | proc_warn (pi, "set_exec_trap (PIOCGSPCACT)", __LINE__); |
| 4448 | gdb_flush (gdb_stderr); |
| 4449 | _exit (127); |
| 4450 | } |
| 4451 | prfs_flags |= PRFS_STOPEXEC; |
| 4452 | |
| 4453 | if (ioctl (pi->ctl_fd, PIOCSSPCACT, &prfs_flags) < 0) |
| 4454 | { |
| 4455 | proc_warn (pi, "set_exec_trap (PIOCSSPCACT)", __LINE__); |
| 4456 | gdb_flush (gdb_stderr); |
| 4457 | _exit (127); |
| 4458 | } |
| 4459 | } |
| 4460 | #else /* not PRFS_STOPEXEC */ |
| 4461 | /* Everyone else's (except OSF) method for tracing exec syscalls. */ |
| 4462 | /* GW: Rationale... |
| 4463 | Not all systems with /proc have all the exec* syscalls with the same |
| 4464 | names. On the SGI, for example, there is no SYS_exec, but there |
| 4465 | *is* a SYS_execv. So, we try to account for that. */ |
| 4466 | |
| 4467 | exitset = sysset_t_alloc (pi); |
| 4468 | gdb_premptysysset (exitset); |
| 4469 | #ifdef SYS_exec |
| 4470 | gdb_praddsysset (exitset, SYS_exec); |
| 4471 | #endif |
| 4472 | #ifdef SYS_execve |
| 4473 | gdb_praddsysset (exitset, SYS_execve); |
| 4474 | #endif |
| 4475 | #ifdef SYS_execv |
| 4476 | gdb_praddsysset (exitset, SYS_execv); |
| 4477 | #endif |
| 4478 | #ifdef DYNAMIC_SYSCALLS |
| 4479 | { |
| 4480 | int callnum = find_syscall (pi, "execve"); |
| 4481 | |
| 4482 | if (callnum >= 0) |
| 4483 | gdb_praddsysset (exitset, callnum); |
| 4484 | |
| 4485 | callnum = find_syscall (pi, "ra_execve"); |
| 4486 | if (callnum >= 0) |
| 4487 | gdb_praddsysset (exitset, callnum); |
| 4488 | } |
| 4489 | #endif /* DYNAMIC_SYSCALLS */ |
| 4490 | |
| 4491 | if (!proc_set_traced_sysexit (pi, exitset)) |
| 4492 | { |
| 4493 | proc_warn (pi, "set_exec_trap, set_traced_sysexit", __LINE__); |
| 4494 | gdb_flush (gdb_stderr); |
| 4495 | _exit (127); |
| 4496 | } |
| 4497 | #endif /* PRFS_STOPEXEC */ |
| 4498 | |
| 4499 | /* FIXME: should this be done in the parent instead? */ |
| 4500 | /* Turn off inherit on fork flag so that all grand-children |
| 4501 | of gdb start with tracing flags cleared. */ |
| 4502 | if (!proc_unset_inherit_on_fork (pi)) |
| 4503 | proc_warn (pi, "set_exec_trap, unset_inherit", __LINE__); |
| 4504 | |
| 4505 | /* Turn off run on last close flag, so that the child process |
| 4506 | cannot run away just because we close our handle on it. |
| 4507 | We want it to wait for the parent to attach. */ |
| 4508 | if (!proc_unset_run_on_last_close (pi)) |
| 4509 | proc_warn (pi, "set_exec_trap, unset_RLC", __LINE__); |
| 4510 | |
| 4511 | /* FIXME: No need to destroy the procinfo -- |
| 4512 | we have our own address space, and we're about to do an exec! */ |
| 4513 | /*destroy_procinfo (pi);*/ |
| 4514 | } |
| 4515 | |
| 4516 | /* This function is called BEFORE gdb forks the inferior process. Its |
| 4517 | only real responsibility is to set things up for the fork, and tell |
| 4518 | GDB which two functions to call after the fork (one for the parent, |
| 4519 | and one for the child). |
| 4520 | |
| 4521 | This function does a complicated search for a unix shell program, |
| 4522 | which it then uses to parse arguments and environment variables to |
| 4523 | be sent to the child. I wonder whether this code could not be |
| 4524 | abstracted out and shared with other unix targets such as |
| 4525 | inf-ptrace? */ |
| 4526 | |
| 4527 | static void |
| 4528 | procfs_create_inferior (struct target_ops *ops, char *exec_file, |
| 4529 | char *allargs, char **env, int from_tty) |
| 4530 | { |
| 4531 | char *shell_file = getenv ("SHELL"); |
| 4532 | char *tryname; |
| 4533 | int pid; |
| 4534 | |
| 4535 | if (shell_file != NULL && strchr (shell_file, '/') == NULL) |
| 4536 | { |
| 4537 | |
| 4538 | /* We will be looking down the PATH to find shell_file. If we |
| 4539 | just do this the normal way (via execlp, which operates by |
| 4540 | attempting an exec for each element of the PATH until it |
| 4541 | finds one which succeeds), then there will be an exec for |
| 4542 | each failed attempt, each of which will cause a PR_SYSEXIT |
| 4543 | stop, and we won't know how to distinguish the PR_SYSEXIT's |
| 4544 | for these failed execs with the ones for successful execs |
| 4545 | (whether the exec has succeeded is stored at that time in the |
| 4546 | carry bit or some such architecture-specific and |
| 4547 | non-ABI-specified place). |
| 4548 | |
| 4549 | So I can't think of anything better than to search the PATH |
| 4550 | now. This has several disadvantages: (1) There is a race |
| 4551 | condition; if we find a file now and it is deleted before we |
| 4552 | exec it, we lose, even if the deletion leaves a valid file |
| 4553 | further down in the PATH, (2) there is no way to know exactly |
| 4554 | what an executable (in the sense of "capable of being |
| 4555 | exec'd") file is. Using access() loses because it may lose |
| 4556 | if the caller is the superuser; failing to use it loses if |
| 4557 | there are ACLs or some such. */ |
| 4558 | |
| 4559 | char *p; |
| 4560 | char *p1; |
| 4561 | /* FIXME-maybe: might want "set path" command so user can change what |
| 4562 | path is used from within GDB. */ |
| 4563 | char *path = getenv ("PATH"); |
| 4564 | int len; |
| 4565 | struct stat statbuf; |
| 4566 | |
| 4567 | if (path == NULL) |
| 4568 | path = "/bin:/usr/bin"; |
| 4569 | |
| 4570 | tryname = alloca (strlen (path) + strlen (shell_file) + 2); |
| 4571 | for (p = path; p != NULL; p = p1 ? p1 + 1: NULL) |
| 4572 | { |
| 4573 | p1 = strchr (p, ':'); |
| 4574 | if (p1 != NULL) |
| 4575 | len = p1 - p; |
| 4576 | else |
| 4577 | len = strlen (p); |
| 4578 | strncpy (tryname, p, len); |
| 4579 | tryname[len] = '\0'; |
| 4580 | strcat (tryname, "/"); |
| 4581 | strcat (tryname, shell_file); |
| 4582 | if (access (tryname, X_OK) < 0) |
| 4583 | continue; |
| 4584 | if (stat (tryname, &statbuf) < 0) |
| 4585 | continue; |
| 4586 | if (!S_ISREG (statbuf.st_mode)) |
| 4587 | /* We certainly need to reject directories. I'm not quite |
| 4588 | as sure about FIFOs, sockets, etc., but I kind of doubt |
| 4589 | that people want to exec() these things. */ |
| 4590 | continue; |
| 4591 | break; |
| 4592 | } |
| 4593 | if (p == NULL) |
| 4594 | /* Not found. This must be an error rather than merely passing |
| 4595 | the file to execlp(), because execlp() would try all the |
| 4596 | exec()s, causing GDB to get confused. */ |
| 4597 | error (_("procfs:%d -- Can't find shell %s in PATH"), |
| 4598 | __LINE__, shell_file); |
| 4599 | |
| 4600 | shell_file = tryname; |
| 4601 | } |
| 4602 | |
| 4603 | pid = fork_inferior (exec_file, allargs, env, procfs_set_exec_trap, |
| 4604 | NULL, NULL, shell_file, NULL); |
| 4605 | |
| 4606 | procfs_init_inferior (ops, pid); |
| 4607 | } |
| 4608 | |
| 4609 | /* An observer for the "inferior_created" event. */ |
| 4610 | |
| 4611 | static void |
| 4612 | procfs_inferior_created (struct target_ops *ops, int from_tty) |
| 4613 | { |
| 4614 | #ifdef SYS_syssgi |
| 4615 | /* Make sure to cancel the syssgi() syscall-exit notifications. |
| 4616 | They should normally have been removed by now, but they may still |
| 4617 | be activated if the inferior doesn't use shared libraries, or if |
| 4618 | we didn't locate __dbx_link, or if we never stopped in __dbx_link. |
| 4619 | See procfs_init_inferior() for more details. |
| 4620 | |
| 4621 | Since these notifications are only ever enabled when we spawned |
| 4622 | the inferior ourselves, there is nothing to do when the inferior |
| 4623 | was created by attaching to an already running process, or when |
| 4624 | debugging a core file. */ |
| 4625 | if (current_inferior ()->attach_flag || !target_can_run (¤t_target)) |
| 4626 | return; |
| 4627 | |
| 4628 | proc_trace_syscalls_1 (find_procinfo_or_die (ptid_get_pid (inferior_ptid), |
| 4629 | 0), SYS_syssgi, PR_SYSEXIT, FLAG_RESET, 0); |
| 4630 | #endif |
| 4631 | } |
| 4632 | |
| 4633 | /* Callback for update_thread_list. Calls "add_thread". */ |
| 4634 | |
| 4635 | static int |
| 4636 | procfs_notice_thread (procinfo *pi, procinfo *thread, void *ptr) |
| 4637 | { |
| 4638 | ptid_t gdb_threadid = ptid_build (pi->pid, thread->tid, 0); |
| 4639 | |
| 4640 | if (!in_thread_list (gdb_threadid) || is_exited (gdb_threadid)) |
| 4641 | add_thread (gdb_threadid); |
| 4642 | |
| 4643 | return 0; |
| 4644 | } |
| 4645 | |
| 4646 | /* Query all the threads that the target knows about, and give them |
| 4647 | back to GDB to add to its list. */ |
| 4648 | |
| 4649 | static void |
| 4650 | procfs_update_thread_list (struct target_ops *ops) |
| 4651 | { |
| 4652 | procinfo *pi; |
| 4653 | |
| 4654 | prune_threads (); |
| 4655 | |
| 4656 | /* Find procinfo for main process. */ |
| 4657 | pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), 0); |
| 4658 | proc_update_threads (pi); |
| 4659 | proc_iterate_over_threads (pi, procfs_notice_thread, NULL); |
| 4660 | } |
| 4661 | |
| 4662 | /* Return true if the thread is still 'alive'. This guy doesn't |
| 4663 | really seem to be doing his job. Got to investigate how to tell |
| 4664 | when a thread is really gone. */ |
| 4665 | |
| 4666 | static int |
| 4667 | procfs_thread_alive (struct target_ops *ops, ptid_t ptid) |
| 4668 | { |
| 4669 | int proc, thread; |
| 4670 | procinfo *pi; |
| 4671 | |
| 4672 | proc = ptid_get_pid (ptid); |
| 4673 | thread = ptid_get_lwp (ptid); |
| 4674 | /* If I don't know it, it ain't alive! */ |
| 4675 | if ((pi = find_procinfo (proc, thread)) == NULL) |
| 4676 | return 0; |
| 4677 | |
| 4678 | /* If I can't get its status, it ain't alive! |
| 4679 | What's more, I need to forget about it! */ |
| 4680 | if (!proc_get_status (pi)) |
| 4681 | { |
| 4682 | destroy_procinfo (pi); |
| 4683 | return 0; |
| 4684 | } |
| 4685 | /* I couldn't have got its status if it weren't alive, so it's |
| 4686 | alive. */ |
| 4687 | return 1; |
| 4688 | } |
| 4689 | |
| 4690 | /* Convert PTID to a string. Returns the string in a static |
| 4691 | buffer. */ |
| 4692 | |
| 4693 | static char * |
| 4694 | procfs_pid_to_str (struct target_ops *ops, ptid_t ptid) |
| 4695 | { |
| 4696 | static char buf[80]; |
| 4697 | |
| 4698 | if (ptid_get_lwp (ptid) == 0) |
| 4699 | sprintf (buf, "process %d", ptid_get_pid (ptid)); |
| 4700 | else |
| 4701 | sprintf (buf, "LWP %ld", ptid_get_lwp (ptid)); |
| 4702 | |
| 4703 | return buf; |
| 4704 | } |
| 4705 | |
| 4706 | /* Insert a watchpoint. */ |
| 4707 | |
| 4708 | static int |
| 4709 | procfs_set_watchpoint (ptid_t ptid, CORE_ADDR addr, int len, int rwflag, |
| 4710 | int after) |
| 4711 | { |
| 4712 | #ifndef AIX5 |
| 4713 | int pflags = 0; |
| 4714 | procinfo *pi; |
| 4715 | |
| 4716 | pi = find_procinfo_or_die (ptid_get_pid (ptid) == -1 ? |
| 4717 | ptid_get_pid (inferior_ptid) : ptid_get_pid (ptid), |
| 4718 | 0); |
| 4719 | |
| 4720 | /* Translate from GDB's flags to /proc's. */ |
| 4721 | if (len > 0) /* len == 0 means delete watchpoint. */ |
| 4722 | { |
| 4723 | switch (rwflag) { /* FIXME: need an enum! */ |
| 4724 | case hw_write: /* default watchpoint (write) */ |
| 4725 | pflags = WRITE_WATCHFLAG; |
| 4726 | break; |
| 4727 | case hw_read: /* read watchpoint */ |
| 4728 | pflags = READ_WATCHFLAG; |
| 4729 | break; |
| 4730 | case hw_access: /* access watchpoint */ |
| 4731 | pflags = READ_WATCHFLAG | WRITE_WATCHFLAG; |
| 4732 | break; |
| 4733 | case hw_execute: /* execution HW breakpoint */ |
| 4734 | pflags = EXEC_WATCHFLAG; |
| 4735 | break; |
| 4736 | default: /* Something weird. Return error. */ |
| 4737 | return -1; |
| 4738 | } |
| 4739 | if (after) /* Stop after r/w access is completed. */ |
| 4740 | pflags |= AFTER_WATCHFLAG; |
| 4741 | } |
| 4742 | |
| 4743 | if (!proc_set_watchpoint (pi, addr, len, pflags)) |
| 4744 | { |
| 4745 | if (errno == E2BIG) /* Typical error for no resources. */ |
| 4746 | return -1; /* fail */ |
| 4747 | /* GDB may try to remove the same watchpoint twice. |
| 4748 | If a remove request returns no match, don't error. */ |
| 4749 | if (errno == ESRCH && len == 0) |
| 4750 | return 0; /* ignore */ |
| 4751 | proc_error (pi, "set_watchpoint", __LINE__); |
| 4752 | } |
| 4753 | #endif /* AIX5 */ |
| 4754 | return 0; |
| 4755 | } |
| 4756 | |
| 4757 | /* Return non-zero if we can set a hardware watchpoint of type TYPE. TYPE |
| 4758 | is one of bp_hardware_watchpoint, bp_read_watchpoint, bp_write_watchpoint, |
| 4759 | or bp_hardware_watchpoint. CNT is the number of watchpoints used so |
| 4760 | far. |
| 4761 | |
| 4762 | Note: procfs_can_use_hw_breakpoint() is not yet used by all |
| 4763 | procfs.c targets due to the fact that some of them still define |
| 4764 | target_can_use_hardware_watchpoint. */ |
| 4765 | |
| 4766 | static int |
| 4767 | procfs_can_use_hw_breakpoint (struct target_ops *self, |
| 4768 | enum bptype type, |
| 4769 | int cnt, int othertype) |
| 4770 | { |
| 4771 | /* Due to the way that proc_set_watchpoint() is implemented, host |
| 4772 | and target pointers must be of the same size. If they are not, |
| 4773 | we can't use hardware watchpoints. This limitation is due to the |
| 4774 | fact that proc_set_watchpoint() calls |
| 4775 | procfs_address_to_host_pointer(); a close inspection of |
| 4776 | procfs_address_to_host_pointer will reveal that an internal error |
| 4777 | will be generated when the host and target pointer sizes are |
| 4778 | different. */ |
| 4779 | struct type *ptr_type = builtin_type (target_gdbarch ())->builtin_data_ptr; |
| 4780 | |
| 4781 | if (sizeof (void *) != TYPE_LENGTH (ptr_type)) |
| 4782 | return 0; |
| 4783 | |
| 4784 | /* Other tests here??? */ |
| 4785 | |
| 4786 | return 1; |
| 4787 | } |
| 4788 | |
| 4789 | /* Returns non-zero if process is stopped on a hardware watchpoint |
| 4790 | fault, else returns zero. */ |
| 4791 | |
| 4792 | static int |
| 4793 | procfs_stopped_by_watchpoint (struct target_ops *ops) |
| 4794 | { |
| 4795 | procinfo *pi; |
| 4796 | |
| 4797 | pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), 0); |
| 4798 | |
| 4799 | if (proc_flags (pi) & (PR_STOPPED | PR_ISTOP)) |
| 4800 | { |
| 4801 | if (proc_why (pi) == PR_FAULTED) |
| 4802 | { |
| 4803 | #ifdef FLTWATCH |
| 4804 | if (proc_what (pi) == FLTWATCH) |
| 4805 | return 1; |
| 4806 | #endif |
| 4807 | #ifdef FLTKWATCH |
| 4808 | if (proc_what (pi) == FLTKWATCH) |
| 4809 | return 1; |
| 4810 | #endif |
| 4811 | } |
| 4812 | } |
| 4813 | return 0; |
| 4814 | } |
| 4815 | |
| 4816 | /* Returns 1 if the OS knows the position of the triggered watchpoint, |
| 4817 | and sets *ADDR to that address. Returns 0 if OS cannot report that |
| 4818 | address. This function is only called if |
| 4819 | procfs_stopped_by_watchpoint returned 1, thus no further checks are |
| 4820 | done. The function also assumes that ADDR is not NULL. */ |
| 4821 | |
| 4822 | static int |
| 4823 | procfs_stopped_data_address (struct target_ops *targ, CORE_ADDR *addr) |
| 4824 | { |
| 4825 | procinfo *pi; |
| 4826 | |
| 4827 | pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), 0); |
| 4828 | return proc_watchpoint_address (pi, addr); |
| 4829 | } |
| 4830 | |
| 4831 | static int |
| 4832 | procfs_insert_watchpoint (struct target_ops *self, |
| 4833 | CORE_ADDR addr, int len, |
| 4834 | enum target_hw_bp_type type, |
| 4835 | struct expression *cond) |
| 4836 | { |
| 4837 | if (!target_have_steppable_watchpoint |
| 4838 | && !gdbarch_have_nonsteppable_watchpoint (target_gdbarch ())) |
| 4839 | { |
| 4840 | /* When a hardware watchpoint fires off the PC will be left at |
| 4841 | the instruction following the one which caused the |
| 4842 | watchpoint. It will *NOT* be necessary for GDB to step over |
| 4843 | the watchpoint. */ |
| 4844 | return procfs_set_watchpoint (inferior_ptid, addr, len, type, 1); |
| 4845 | } |
| 4846 | else |
| 4847 | { |
| 4848 | /* When a hardware watchpoint fires off the PC will be left at |
| 4849 | the instruction which caused the watchpoint. It will be |
| 4850 | necessary for GDB to step over the watchpoint. */ |
| 4851 | return procfs_set_watchpoint (inferior_ptid, addr, len, type, 0); |
| 4852 | } |
| 4853 | } |
| 4854 | |
| 4855 | static int |
| 4856 | procfs_remove_watchpoint (struct target_ops *self, |
| 4857 | CORE_ADDR addr, int len, |
| 4858 | enum target_hw_bp_type type, |
| 4859 | struct expression *cond) |
| 4860 | { |
| 4861 | return procfs_set_watchpoint (inferior_ptid, addr, 0, 0, 0); |
| 4862 | } |
| 4863 | |
| 4864 | static int |
| 4865 | procfs_region_ok_for_hw_watchpoint (struct target_ops *self, |
| 4866 | CORE_ADDR addr, int len) |
| 4867 | { |
| 4868 | /* The man page for proc(4) on Solaris 2.6 and up says that the |
| 4869 | system can support "thousands" of hardware watchpoints, but gives |
| 4870 | no method for finding out how many; It doesn't say anything about |
| 4871 | the allowed size for the watched area either. So we just tell |
| 4872 | GDB 'yes'. */ |
| 4873 | return 1; |
| 4874 | } |
| 4875 | |
| 4876 | void |
| 4877 | procfs_use_watchpoints (struct target_ops *t) |
| 4878 | { |
| 4879 | t->to_stopped_by_watchpoint = procfs_stopped_by_watchpoint; |
| 4880 | t->to_insert_watchpoint = procfs_insert_watchpoint; |
| 4881 | t->to_remove_watchpoint = procfs_remove_watchpoint; |
| 4882 | t->to_region_ok_for_hw_watchpoint = procfs_region_ok_for_hw_watchpoint; |
| 4883 | t->to_can_use_hw_breakpoint = procfs_can_use_hw_breakpoint; |
| 4884 | t->to_stopped_data_address = procfs_stopped_data_address; |
| 4885 | } |
| 4886 | |
| 4887 | /* Memory Mappings Functions: */ |
| 4888 | |
| 4889 | /* Call a callback function once for each mapping, passing it the |
| 4890 | mapping, an optional secondary callback function, and some optional |
| 4891 | opaque data. Quit and return the first non-zero value returned |
| 4892 | from the callback. |
| 4893 | |
| 4894 | PI is the procinfo struct for the process to be mapped. FUNC is |
| 4895 | the callback function to be called by this iterator. DATA is the |
| 4896 | optional opaque data to be passed to the callback function. |
| 4897 | CHILD_FUNC is the optional secondary function pointer to be passed |
| 4898 | to the child function. Returns the first non-zero return value |
| 4899 | from the callback function, or zero. */ |
| 4900 | |
| 4901 | static int |
| 4902 | iterate_over_mappings (procinfo *pi, find_memory_region_ftype child_func, |
| 4903 | void *data, |
| 4904 | int (*func) (struct prmap *map, |
| 4905 | find_memory_region_ftype child_func, |
| 4906 | void *data)) |
| 4907 | { |
| 4908 | char pathname[MAX_PROC_NAME_SIZE]; |
| 4909 | struct prmap *prmaps; |
| 4910 | struct prmap *prmap; |
| 4911 | int funcstat; |
| 4912 | int map_fd; |
| 4913 | int nmap; |
| 4914 | struct cleanup *cleanups = make_cleanup (null_cleanup, NULL); |
| 4915 | #ifdef NEW_PROC_API |
| 4916 | struct stat sbuf; |
| 4917 | #endif |
| 4918 | |
| 4919 | /* Get the number of mappings, allocate space, |
| 4920 | and read the mappings into prmaps. */ |
| 4921 | #ifdef NEW_PROC_API |
| 4922 | /* Open map fd. */ |
| 4923 | sprintf (pathname, "/proc/%d/map", pi->pid); |
| 4924 | if ((map_fd = open (pathname, O_RDONLY)) < 0) |
| 4925 | proc_error (pi, "iterate_over_mappings (open)", __LINE__); |
| 4926 | |
| 4927 | /* Make sure it gets closed again. */ |
| 4928 | make_cleanup_close (map_fd); |
| 4929 | |
| 4930 | /* Use stat to determine the file size, and compute |
| 4931 | the number of prmap_t objects it contains. */ |
| 4932 | if (fstat (map_fd, &sbuf) != 0) |
| 4933 | proc_error (pi, "iterate_over_mappings (fstat)", __LINE__); |
| 4934 | |
| 4935 | nmap = sbuf.st_size / sizeof (prmap_t); |
| 4936 | prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps)); |
| 4937 | if (read (map_fd, (char *) prmaps, nmap * sizeof (*prmaps)) |
| 4938 | != (nmap * sizeof (*prmaps))) |
| 4939 | proc_error (pi, "iterate_over_mappings (read)", __LINE__); |
| 4940 | #else |
| 4941 | /* Use ioctl command PIOCNMAP to get number of mappings. */ |
| 4942 | if (ioctl (pi->ctl_fd, PIOCNMAP, &nmap) != 0) |
| 4943 | proc_error (pi, "iterate_over_mappings (PIOCNMAP)", __LINE__); |
| 4944 | |
| 4945 | prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps)); |
| 4946 | if (ioctl (pi->ctl_fd, PIOCMAP, prmaps) != 0) |
| 4947 | proc_error (pi, "iterate_over_mappings (PIOCMAP)", __LINE__); |
| 4948 | #endif |
| 4949 | |
| 4950 | for (prmap = prmaps; nmap > 0; prmap++, nmap--) |
| 4951 | if ((funcstat = (*func) (prmap, child_func, data)) != 0) |
| 4952 | { |
| 4953 | do_cleanups (cleanups); |
| 4954 | return funcstat; |
| 4955 | } |
| 4956 | |
| 4957 | do_cleanups (cleanups); |
| 4958 | return 0; |
| 4959 | } |
| 4960 | |
| 4961 | /* Implements the to_find_memory_regions method. Calls an external |
| 4962 | function for each memory region. |
| 4963 | Returns the integer value returned by the callback. */ |
| 4964 | |
| 4965 | static int |
| 4966 | find_memory_regions_callback (struct prmap *map, |
| 4967 | find_memory_region_ftype func, void *data) |
| 4968 | { |
| 4969 | return (*func) ((CORE_ADDR) map->pr_vaddr, |
| 4970 | map->pr_size, |
| 4971 | (map->pr_mflags & MA_READ) != 0, |
| 4972 | (map->pr_mflags & MA_WRITE) != 0, |
| 4973 | (map->pr_mflags & MA_EXEC) != 0, |
| 4974 | 1, /* MODIFIED is unknown, pass it as true. */ |
| 4975 | data); |
| 4976 | } |
| 4977 | |
| 4978 | /* External interface. Calls a callback function once for each |
| 4979 | mapped memory region in the child process, passing as arguments: |
| 4980 | |
| 4981 | CORE_ADDR virtual_address, |
| 4982 | unsigned long size, |
| 4983 | int read, TRUE if region is readable by the child |
| 4984 | int write, TRUE if region is writable by the child |
| 4985 | int execute TRUE if region is executable by the child. |
| 4986 | |
| 4987 | Stops iterating and returns the first non-zero value returned by |
| 4988 | the callback. */ |
| 4989 | |
| 4990 | static int |
| 4991 | proc_find_memory_regions (struct target_ops *self, |
| 4992 | find_memory_region_ftype func, void *data) |
| 4993 | { |
| 4994 | procinfo *pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), 0); |
| 4995 | |
| 4996 | return iterate_over_mappings (pi, func, data, |
| 4997 | find_memory_regions_callback); |
| 4998 | } |
| 4999 | |
| 5000 | /* Returns an ascii representation of a memory mapping's flags. */ |
| 5001 | |
| 5002 | static char * |
| 5003 | mappingflags (long flags) |
| 5004 | { |
| 5005 | static char asciiflags[8]; |
| 5006 | |
| 5007 | strcpy (asciiflags, "-------"); |
| 5008 | #if defined (MA_PHYS) |
| 5009 | if (flags & MA_PHYS) |
| 5010 | asciiflags[0] = 'd'; |
| 5011 | #endif |
| 5012 | if (flags & MA_STACK) |
| 5013 | asciiflags[1] = 's'; |
| 5014 | if (flags & MA_BREAK) |
| 5015 | asciiflags[2] = 'b'; |
| 5016 | if (flags & MA_SHARED) |
| 5017 | asciiflags[3] = 's'; |
| 5018 | if (flags & MA_READ) |
| 5019 | asciiflags[4] = 'r'; |
| 5020 | if (flags & MA_WRITE) |
| 5021 | asciiflags[5] = 'w'; |
| 5022 | if (flags & MA_EXEC) |
| 5023 | asciiflags[6] = 'x'; |
| 5024 | return (asciiflags); |
| 5025 | } |
| 5026 | |
| 5027 | /* Callback function, does the actual work for 'info proc |
| 5028 | mappings'. */ |
| 5029 | |
| 5030 | static int |
| 5031 | info_mappings_callback (struct prmap *map, find_memory_region_ftype ignore, |
| 5032 | void *unused) |
| 5033 | { |
| 5034 | unsigned int pr_off; |
| 5035 | |
| 5036 | #ifdef PCAGENT /* Horrible hack: only defined on Solaris 2.6+ */ |
| 5037 | pr_off = (unsigned int) map->pr_offset; |
| 5038 | #else |
| 5039 | pr_off = map->pr_off; |
| 5040 | #endif |
| 5041 | |
| 5042 | if (gdbarch_addr_bit (target_gdbarch ()) == 32) |
| 5043 | printf_filtered ("\t%#10lx %#10lx %#10lx %#10x %7s\n", |
| 5044 | (unsigned long) map->pr_vaddr, |
| 5045 | (unsigned long) map->pr_vaddr + map->pr_size - 1, |
| 5046 | (unsigned long) map->pr_size, |
| 5047 | pr_off, |
| 5048 | mappingflags (map->pr_mflags)); |
| 5049 | else |
| 5050 | printf_filtered (" %#18lx %#18lx %#10lx %#10x %7s\n", |
| 5051 | (unsigned long) map->pr_vaddr, |
| 5052 | (unsigned long) map->pr_vaddr + map->pr_size - 1, |
| 5053 | (unsigned long) map->pr_size, |
| 5054 | pr_off, |
| 5055 | mappingflags (map->pr_mflags)); |
| 5056 | |
| 5057 | return 0; |
| 5058 | } |
| 5059 | |
| 5060 | /* Implement the "info proc mappings" subcommand. */ |
| 5061 | |
| 5062 | static void |
| 5063 | info_proc_mappings (procinfo *pi, int summary) |
| 5064 | { |
| 5065 | if (summary) |
| 5066 | return; /* No output for summary mode. */ |
| 5067 | |
| 5068 | printf_filtered (_("Mapped address spaces:\n\n")); |
| 5069 | if (gdbarch_ptr_bit (target_gdbarch ()) == 32) |
| 5070 | printf_filtered ("\t%10s %10s %10s %10s %7s\n", |
| 5071 | "Start Addr", |
| 5072 | " End Addr", |
| 5073 | " Size", |
| 5074 | " Offset", |
| 5075 | "Flags"); |
| 5076 | else |
| 5077 | printf_filtered (" %18s %18s %10s %10s %7s\n", |
| 5078 | "Start Addr", |
| 5079 | " End Addr", |
| 5080 | " Size", |
| 5081 | " Offset", |
| 5082 | "Flags"); |
| 5083 | |
| 5084 | iterate_over_mappings (pi, NULL, NULL, info_mappings_callback); |
| 5085 | printf_filtered ("\n"); |
| 5086 | } |
| 5087 | |
| 5088 | /* Implement the "info proc" command. */ |
| 5089 | |
| 5090 | static void |
| 5091 | procfs_info_proc (struct target_ops *ops, const char *args, |
| 5092 | enum info_proc_what what) |
| 5093 | { |
| 5094 | struct cleanup *old_chain; |
| 5095 | procinfo *process = NULL; |
| 5096 | procinfo *thread = NULL; |
| 5097 | char **argv = NULL; |
| 5098 | char *tmp = NULL; |
| 5099 | int pid = 0; |
| 5100 | int tid = 0; |
| 5101 | int mappings = 0; |
| 5102 | |
| 5103 | switch (what) |
| 5104 | { |
| 5105 | case IP_MINIMAL: |
| 5106 | break; |
| 5107 | |
| 5108 | case IP_MAPPINGS: |
| 5109 | case IP_ALL: |
| 5110 | mappings = 1; |
| 5111 | break; |
| 5112 | |
| 5113 | default: |
| 5114 | error (_("Not supported on this target.")); |
| 5115 | } |
| 5116 | |
| 5117 | old_chain = make_cleanup (null_cleanup, 0); |
| 5118 | if (args) |
| 5119 | { |
| 5120 | argv = gdb_buildargv (args); |
| 5121 | make_cleanup_freeargv (argv); |
| 5122 | } |
| 5123 | while (argv != NULL && *argv != NULL) |
| 5124 | { |
| 5125 | if (isdigit (argv[0][0])) |
| 5126 | { |
| 5127 | pid = strtoul (argv[0], &tmp, 10); |
| 5128 | if (*tmp == '/') |
| 5129 | tid = strtoul (++tmp, NULL, 10); |
| 5130 | } |
| 5131 | else if (argv[0][0] == '/') |
| 5132 | { |
| 5133 | tid = strtoul (argv[0] + 1, NULL, 10); |
| 5134 | } |
| 5135 | argv++; |
| 5136 | } |
| 5137 | if (pid == 0) |
| 5138 | pid = ptid_get_pid (inferior_ptid); |
| 5139 | if (pid == 0) |
| 5140 | error (_("No current process: you must name one.")); |
| 5141 | else |
| 5142 | { |
| 5143 | /* Have pid, will travel. |
| 5144 | First see if it's a process we're already debugging. */ |
| 5145 | process = find_procinfo (pid, 0); |
| 5146 | if (process == NULL) |
| 5147 | { |
| 5148 | /* No. So open a procinfo for it, but |
| 5149 | remember to close it again when finished. */ |
| 5150 | process = create_procinfo (pid, 0); |
| 5151 | make_cleanup (do_destroy_procinfo_cleanup, process); |
| 5152 | if (!open_procinfo_files (process, FD_CTL)) |
| 5153 | proc_error (process, "info proc, open_procinfo_files", __LINE__); |
| 5154 | } |
| 5155 | } |
| 5156 | if (tid != 0) |
| 5157 | thread = create_procinfo (pid, tid); |
| 5158 | |
| 5159 | if (process) |
| 5160 | { |
| 5161 | printf_filtered (_("process %d flags:\n"), process->pid); |
| 5162 | proc_prettyprint_flags (proc_flags (process), 1); |
| 5163 | if (proc_flags (process) & (PR_STOPPED | PR_ISTOP)) |
| 5164 | proc_prettyprint_why (proc_why (process), proc_what (process), 1); |
| 5165 | if (proc_get_nthreads (process) > 1) |
| 5166 | printf_filtered ("Process has %d threads.\n", |
| 5167 | proc_get_nthreads (process)); |
| 5168 | } |
| 5169 | if (thread) |
| 5170 | { |
| 5171 | printf_filtered (_("thread %d flags:\n"), thread->tid); |
| 5172 | proc_prettyprint_flags (proc_flags (thread), 1); |
| 5173 | if (proc_flags (thread) & (PR_STOPPED | PR_ISTOP)) |
| 5174 | proc_prettyprint_why (proc_why (thread), proc_what (thread), 1); |
| 5175 | } |
| 5176 | |
| 5177 | if (mappings) |
| 5178 | { |
| 5179 | info_proc_mappings (process, 0); |
| 5180 | } |
| 5181 | |
| 5182 | do_cleanups (old_chain); |
| 5183 | } |
| 5184 | |
| 5185 | /* Modify the status of the system call identified by SYSCALLNUM in |
| 5186 | the set of syscalls that are currently traced/debugged. |
| 5187 | |
| 5188 | If ENTRY_OR_EXIT is set to PR_SYSENTRY, then the entry syscalls set |
| 5189 | will be updated. Otherwise, the exit syscalls set will be updated. |
| 5190 | |
| 5191 | If MODE is FLAG_SET, then traces will be enabled. Otherwise, they |
| 5192 | will be disabled. */ |
| 5193 | |
| 5194 | static void |
| 5195 | proc_trace_syscalls_1 (procinfo *pi, int syscallnum, int entry_or_exit, |
| 5196 | int mode, int from_tty) |
| 5197 | { |
| 5198 | sysset_t *sysset; |
| 5199 | |
| 5200 | if (entry_or_exit == PR_SYSENTRY) |
| 5201 | sysset = proc_get_traced_sysentry (pi, NULL); |
| 5202 | else |
| 5203 | sysset = proc_get_traced_sysexit (pi, NULL); |
| 5204 | |
| 5205 | if (sysset == NULL) |
| 5206 | proc_error (pi, "proc-trace, get_traced_sysset", __LINE__); |
| 5207 | |
| 5208 | if (mode == FLAG_SET) |
| 5209 | gdb_praddsysset (sysset, syscallnum); |
| 5210 | else |
| 5211 | gdb_prdelsysset (sysset, syscallnum); |
| 5212 | |
| 5213 | if (entry_or_exit == PR_SYSENTRY) |
| 5214 | { |
| 5215 | if (!proc_set_traced_sysentry (pi, sysset)) |
| 5216 | proc_error (pi, "proc-trace, set_traced_sysentry", __LINE__); |
| 5217 | } |
| 5218 | else |
| 5219 | { |
| 5220 | if (!proc_set_traced_sysexit (pi, sysset)) |
| 5221 | proc_error (pi, "proc-trace, set_traced_sysexit", __LINE__); |
| 5222 | } |
| 5223 | } |
| 5224 | |
| 5225 | static void |
| 5226 | proc_trace_syscalls (char *args, int from_tty, int entry_or_exit, int mode) |
| 5227 | { |
| 5228 | procinfo *pi; |
| 5229 | |
| 5230 | if (ptid_get_pid (inferior_ptid) <= 0) |
| 5231 | error (_("you must be debugging a process to use this command.")); |
| 5232 | |
| 5233 | if (args == NULL || args[0] == 0) |
| 5234 | error_no_arg (_("system call to trace")); |
| 5235 | |
| 5236 | pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), 0); |
| 5237 | if (isdigit (args[0])) |
| 5238 | { |
| 5239 | const int syscallnum = atoi (args); |
| 5240 | |
| 5241 | proc_trace_syscalls_1 (pi, syscallnum, entry_or_exit, mode, from_tty); |
| 5242 | } |
| 5243 | } |
| 5244 | |
| 5245 | static void |
| 5246 | proc_trace_sysentry_cmd (char *args, int from_tty) |
| 5247 | { |
| 5248 | proc_trace_syscalls (args, from_tty, PR_SYSENTRY, FLAG_SET); |
| 5249 | } |
| 5250 | |
| 5251 | static void |
| 5252 | proc_trace_sysexit_cmd (char *args, int from_tty) |
| 5253 | { |
| 5254 | proc_trace_syscalls (args, from_tty, PR_SYSEXIT, FLAG_SET); |
| 5255 | } |
| 5256 | |
| 5257 | static void |
| 5258 | proc_untrace_sysentry_cmd (char *args, int from_tty) |
| 5259 | { |
| 5260 | proc_trace_syscalls (args, from_tty, PR_SYSENTRY, FLAG_RESET); |
| 5261 | } |
| 5262 | |
| 5263 | static void |
| 5264 | proc_untrace_sysexit_cmd (char *args, int from_tty) |
| 5265 | { |
| 5266 | proc_trace_syscalls (args, from_tty, PR_SYSEXIT, FLAG_RESET); |
| 5267 | } |
| 5268 | |
| 5269 | |
| 5270 | /* Provide a prototype to silence -Wmissing-prototypes. */ |
| 5271 | extern void _initialize_procfs (void); |
| 5272 | |
| 5273 | void |
| 5274 | _initialize_procfs (void) |
| 5275 | { |
| 5276 | observer_attach_inferior_created (procfs_inferior_created); |
| 5277 | |
| 5278 | add_com ("proc-trace-entry", no_class, proc_trace_sysentry_cmd, |
| 5279 | _("Give a trace of entries into the syscall.")); |
| 5280 | add_com ("proc-trace-exit", no_class, proc_trace_sysexit_cmd, |
| 5281 | _("Give a trace of exits from the syscall.")); |
| 5282 | add_com ("proc-untrace-entry", no_class, proc_untrace_sysentry_cmd, |
| 5283 | _("Cancel a trace of entries into the syscall.")); |
| 5284 | add_com ("proc-untrace-exit", no_class, proc_untrace_sysexit_cmd, |
| 5285 | _("Cancel a trace of exits from the syscall.")); |
| 5286 | } |
| 5287 | |
| 5288 | /* =================== END, GDB "MODULE" =================== */ |
| 5289 | |
| 5290 | |
| 5291 | |
| 5292 | /* miscellaneous stubs: */ |
| 5293 | |
| 5294 | /* The following satisfy a few random symbols mostly created by the |
| 5295 | solaris threads implementation, which I will chase down later. */ |
| 5296 | |
| 5297 | /* Return a pid for which we guarantee we will be able to find a |
| 5298 | 'live' procinfo. */ |
| 5299 | |
| 5300 | ptid_t |
| 5301 | procfs_first_available (void) |
| 5302 | { |
| 5303 | return pid_to_ptid (procinfo_list ? procinfo_list->pid : -1); |
| 5304 | } |
| 5305 | |
| 5306 | /* =================== GCORE .NOTE "MODULE" =================== */ |
| 5307 | #if defined (PIOCOPENLWP) || defined (PCAGENT) |
| 5308 | /* gcore only implemented on solaris (so far) */ |
| 5309 | |
| 5310 | static char * |
| 5311 | procfs_do_thread_registers (bfd *obfd, ptid_t ptid, |
| 5312 | char *note_data, int *note_size, |
| 5313 | enum gdb_signal stop_signal) |
| 5314 | { |
| 5315 | struct regcache *regcache = get_thread_regcache (ptid); |
| 5316 | gdb_gregset_t gregs; |
| 5317 | gdb_fpregset_t fpregs; |
| 5318 | unsigned long merged_pid; |
| 5319 | struct cleanup *old_chain; |
| 5320 | |
| 5321 | merged_pid = ptid_get_lwp (ptid) << 16 | ptid_get_pid (ptid); |
| 5322 | |
| 5323 | /* This part is the old method for fetching registers. |
| 5324 | It should be replaced by the newer one using regsets |
| 5325 | once it is implemented in this platform: |
| 5326 | gdbarch_iterate_over_regset_sections(). */ |
| 5327 | |
| 5328 | old_chain = save_inferior_ptid (); |
| 5329 | inferior_ptid = ptid; |
| 5330 | target_fetch_registers (regcache, -1); |
| 5331 | |
| 5332 | fill_gregset (regcache, &gregs, -1); |
| 5333 | #if defined (NEW_PROC_API) |
| 5334 | note_data = (char *) elfcore_write_lwpstatus (obfd, |
| 5335 | note_data, |
| 5336 | note_size, |
| 5337 | merged_pid, |
| 5338 | stop_signal, |
| 5339 | &gregs); |
| 5340 | #else |
| 5341 | note_data = (char *) elfcore_write_prstatus (obfd, |
| 5342 | note_data, |
| 5343 | note_size, |
| 5344 | merged_pid, |
| 5345 | stop_signal, |
| 5346 | &gregs); |
| 5347 | #endif |
| 5348 | fill_fpregset (regcache, &fpregs, -1); |
| 5349 | note_data = (char *) elfcore_write_prfpreg (obfd, |
| 5350 | note_data, |
| 5351 | note_size, |
| 5352 | &fpregs, |
| 5353 | sizeof (fpregs)); |
| 5354 | |
| 5355 | do_cleanups (old_chain); |
| 5356 | |
| 5357 | return note_data; |
| 5358 | } |
| 5359 | |
| 5360 | struct procfs_corefile_thread_data { |
| 5361 | bfd *obfd; |
| 5362 | char *note_data; |
| 5363 | int *note_size; |
| 5364 | enum gdb_signal stop_signal; |
| 5365 | }; |
| 5366 | |
| 5367 | static int |
| 5368 | procfs_corefile_thread_callback (procinfo *pi, procinfo *thread, void *data) |
| 5369 | { |
| 5370 | struct procfs_corefile_thread_data *args = data; |
| 5371 | |
| 5372 | if (pi != NULL) |
| 5373 | { |
| 5374 | ptid_t ptid = ptid_build (pi->pid, thread->tid, 0); |
| 5375 | |
| 5376 | args->note_data = procfs_do_thread_registers (args->obfd, ptid, |
| 5377 | args->note_data, |
| 5378 | args->note_size, |
| 5379 | args->stop_signal); |
| 5380 | } |
| 5381 | return 0; |
| 5382 | } |
| 5383 | |
| 5384 | static int |
| 5385 | find_signalled_thread (struct thread_info *info, void *data) |
| 5386 | { |
| 5387 | if (info->suspend.stop_signal != GDB_SIGNAL_0 |
| 5388 | && ptid_get_pid (info->ptid) == ptid_get_pid (inferior_ptid)) |
| 5389 | return 1; |
| 5390 | |
| 5391 | return 0; |
| 5392 | } |
| 5393 | |
| 5394 | static enum gdb_signal |
| 5395 | find_stop_signal (void) |
| 5396 | { |
| 5397 | struct thread_info *info = |
| 5398 | iterate_over_threads (find_signalled_thread, NULL); |
| 5399 | |
| 5400 | if (info) |
| 5401 | return info->suspend.stop_signal; |
| 5402 | else |
| 5403 | return GDB_SIGNAL_0; |
| 5404 | } |
| 5405 | |
| 5406 | static char * |
| 5407 | procfs_make_note_section (struct target_ops *self, bfd *obfd, int *note_size) |
| 5408 | { |
| 5409 | struct cleanup *old_chain; |
| 5410 | gdb_gregset_t gregs; |
| 5411 | gdb_fpregset_t fpregs; |
| 5412 | char fname[16] = {'\0'}; |
| 5413 | char psargs[80] = {'\0'}; |
| 5414 | procinfo *pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), 0); |
| 5415 | char *note_data = NULL; |
| 5416 | char *inf_args; |
| 5417 | struct procfs_corefile_thread_data thread_args; |
| 5418 | gdb_byte *auxv; |
| 5419 | int auxv_len; |
| 5420 | enum gdb_signal stop_signal; |
| 5421 | |
| 5422 | if (get_exec_file (0)) |
| 5423 | { |
| 5424 | strncpy (fname, lbasename (get_exec_file (0)), sizeof (fname)); |
| 5425 | fname[sizeof (fname) - 1] = 0; |
| 5426 | strncpy (psargs, get_exec_file (0), sizeof (psargs)); |
| 5427 | psargs[sizeof (psargs) - 1] = 0; |
| 5428 | |
| 5429 | inf_args = get_inferior_args (); |
| 5430 | if (inf_args && *inf_args && |
| 5431 | strlen (inf_args) < ((int) sizeof (psargs) - (int) strlen (psargs))) |
| 5432 | { |
| 5433 | strncat (psargs, " ", |
| 5434 | sizeof (psargs) - strlen (psargs)); |
| 5435 | strncat (psargs, inf_args, |
| 5436 | sizeof (psargs) - strlen (psargs)); |
| 5437 | } |
| 5438 | } |
| 5439 | |
| 5440 | note_data = (char *) elfcore_write_prpsinfo (obfd, |
| 5441 | note_data, |
| 5442 | note_size, |
| 5443 | fname, |
| 5444 | psargs); |
| 5445 | |
| 5446 | stop_signal = find_stop_signal (); |
| 5447 | |
| 5448 | #ifdef NEW_PROC_API |
| 5449 | fill_gregset (get_current_regcache (), &gregs, -1); |
| 5450 | note_data = elfcore_write_pstatus (obfd, note_data, note_size, |
| 5451 | ptid_get_pid (inferior_ptid), |
| 5452 | stop_signal, &gregs); |
| 5453 | #endif |
| 5454 | |
| 5455 | thread_args.obfd = obfd; |
| 5456 | thread_args.note_data = note_data; |
| 5457 | thread_args.note_size = note_size; |
| 5458 | thread_args.stop_signal = stop_signal; |
| 5459 | proc_iterate_over_threads (pi, procfs_corefile_thread_callback, |
| 5460 | &thread_args); |
| 5461 | note_data = thread_args.note_data; |
| 5462 | |
| 5463 | auxv_len = target_read_alloc (¤t_target, TARGET_OBJECT_AUXV, |
| 5464 | NULL, &auxv); |
| 5465 | if (auxv_len > 0) |
| 5466 | { |
| 5467 | note_data = elfcore_write_note (obfd, note_data, note_size, |
| 5468 | "CORE", NT_AUXV, auxv, auxv_len); |
| 5469 | xfree (auxv); |
| 5470 | } |
| 5471 | |
| 5472 | return note_data; |
| 5473 | } |
| 5474 | #else /* !Solaris */ |
| 5475 | static char * |
| 5476 | procfs_make_note_section (struct target_ops *self, bfd *obfd, int *note_size) |
| 5477 | { |
| 5478 | error (_("gcore not implemented for this host.")); |
| 5479 | return NULL; /* lint */ |
| 5480 | } |
| 5481 | #endif /* Solaris */ |
| 5482 | /* =================== END GCORE .NOTE "MODULE" =================== */ |