X-Git-Url: http://git.efficios.com/?a=blobdiff_plain;f=gdb%2Finftarg.c;h=0636eaa128babf936a0c17c229f6edeea30ee147;hb=b1acf338d3974d99af32899092989edeee7fbef4;hp=3270fa687bbe3ac35633ebe6640d91fc86d95034;hpb=de43d7d0059427148461aede30bb07db993fae4b;p=deliverable%2Fbinutils-gdb.git diff --git a/gdb/inftarg.c b/gdb/inftarg.c index 3270fa687b..0636eaa128 100644 --- a/gdb/inftarg.c +++ b/gdb/inftarg.c @@ -1,147 +1,230 @@ /* Target-vector operations for controlling Unix child processes, for GDB. - Copyright 1990, 1991, 1992 Free Software Foundation, Inc. + + Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1998, 1999, + 2000, 2002, 2003, 2004 Free Software Foundation, Inc. + Contributed by Cygnus Support. -This file is part of GDB. + ## Contains temporary hacks.. + + This file is part of GDB. -This program is free software; you can redistribute it and/or modify -it under the terms of the GNU General Public License as published by -the Free Software Foundation; either version 2 of the License, or -(at your option) any later version. + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2 of the License, or + (at your option) any later version. -This program is distributed in the hope that it will be useful, -but WITHOUT ANY WARRANTY; without even the implied warranty of -MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -GNU General Public License for more details. + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. -You should have received a copy of the GNU General Public License -along with this program; if not, write to the Free Software -Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ #include "defs.h" -#include "frame.h" /* required by inferior.h */ +#include "frame.h" /* required by inferior.h */ #include "inferior.h" #include "target.h" -#include "wait.h" #include "gdbcore.h" - +#include "command.h" +#include "gdb_stat.h" #include +#include +#include +#include "observer.h" +#include "gdb_wait.h" +#include "inflow.h" -static void -child_prepare_to_store PARAMS ((void)); +extern struct symtab_and_line *child_enable_exception_callback (enum + exception_event_kind, + int); + +extern struct exception_event_record + *child_get_current_exception_event (void); + +extern void _initialize_inftarg (void); + +static void child_prepare_to_store (void); #ifndef CHILD_WAIT -static int -child_wait PARAMS ((int *)); +static ptid_t child_wait (ptid_t, struct target_waitstatus *); #endif /* CHILD_WAIT */ -static void -child_open PARAMS ((char *, int)); +static void child_open (char *, int); -static void -child_files_info PARAMS ((struct target_ops *)); +static void child_files_info (struct target_ops *); -static void -child_detach PARAMS ((char *, int)); +static void child_detach (char *, int); -static void -child_attach PARAMS ((char *, int)); +static void child_attach (char *, int); -static void -ptrace_me PARAMS ((void)); +#if !defined(CHILD_POST_ATTACH) +extern void child_post_attach (int); +#endif -static void -ptrace_him PARAMS ((int)); +static void ptrace_me (void); -static void -child_create_inferior PARAMS ((char *, char *, char **)); +static void ptrace_him (int); -static void -child_mourn_inferior PARAMS ((void)); +static void child_create_inferior (char *, char *, char **, int); -static int -child_can_run PARAMS ((void)); +static void child_mourn_inferior (void); + +static int child_can_run (void); + +static void child_stop (void); + +#ifndef CHILD_THREAD_ALIVE +int child_thread_alive (ptid_t); +#endif + +static void init_child_ops (void); extern char **environ; -/* Forward declaration */ -extern struct target_ops child_ops; +int child_suppress_run = 0; /* Non-zero if inftarg should pretend not to + be a runnable target. Used by targets + that can sit atop inftarg, such as HPUX + thread support. */ #ifndef CHILD_WAIT /* Wait for child to do something. Return pid of child, or -1 in case - of error; store status through argument pointer STATUS. */ + of error; store status through argument pointer OURSTATUS. */ -static int -child_wait (pid, status) - int pid; - int *status; +static ptid_t +child_wait (ptid_t ptid, struct target_waitstatus *ourstatus) { int save_errno; + int status; + char *execd_pathname = NULL; + int exit_status; + int related_pid; + int syscall_id; + enum target_waitkind kind; + int pid; - do { - if (attach_flag) - set_sigint_trap(); /* Causes SIGINT to be passed on to the + do + { + set_sigint_trap (); /* Causes SIGINT to be passed on to the attached process. */ - pid = wait (status); - save_errno = errno; + set_sigio_trap (); + + pid = wait (&status); + + save_errno = errno; + + clear_sigio_trap (); + + clear_sigint_trap (); + + if (pid == -1) + { + if (save_errno == EINTR) + continue; - if (attach_flag) - clear_sigint_trap(); + fprintf_unfiltered (gdb_stderr, "Child process unexpectedly missing: %s.\n", + safe_strerror (save_errno)); - if (pid == -1) - { - if (save_errno == EINTR) + /* Claim it exited with unknown signal. */ + ourstatus->kind = TARGET_WAITKIND_SIGNALLED; + ourstatus->value.sig = TARGET_SIGNAL_UNKNOWN; + return pid_to_ptid (-1); + } + + /* Did it exit? + */ + if (target_has_exited (pid, status, &exit_status)) + { + /* ??rehrauer: For now, ignore this. */ continue; - fprintf (stderr, "Child process unexpectedly missing: %s.\n", - safe_strerror (save_errno)); - *status = 42; /* Claim it exited with signal 42 */ - return -1; - } - } while (pid != inferior_pid); /* Some other child died or stopped */ - return pid; + } + + if (!target_thread_alive (pid_to_ptid (pid))) + { + ourstatus->kind = TARGET_WAITKIND_SPURIOUS; + return pid_to_ptid (pid); + } + } while (pid != PIDGET (inferior_ptid)); /* Some other child died or stopped */ + + store_waitstatus (ourstatus, status); + return pid_to_ptid (pid); } #endif /* CHILD_WAIT */ +#ifndef CHILD_THREAD_ALIVE + +/* Check to see if the given thread is alive. + + FIXME: Is kill() ever the right way to do this? I doubt it, but + for now we're going to try and be compatable with the old thread + code. */ +int +child_thread_alive (ptid_t ptid) +{ + pid_t pid = PIDGET (ptid); + + return (kill (pid, 0) != -1); +} + +#endif + /* Attach to process PID, then initialize for debugging it. */ static void -child_attach (args, from_tty) - char *args; - int from_tty; +child_attach (char *args, int from_tty) { char *exec_file; int pid; + char *dummy; if (!args) error_no_arg ("process-id to attach"); -#ifndef ATTACH_DETACH - error ("Can't attach to a process on this machine."); -#else - pid = atoi (args); - - if (pid == getpid()) /* Trying to masturbate? */ + dummy = args; + pid = strtol (args, &dummy, 0); + /* Some targets don't set errno on errors, grrr! */ + if ((pid == 0) && (args == dummy)) + error ("Illegal process-id: %s\n", args); + + if (pid == getpid ()) /* Trying to masturbate? */ error ("I refuse to debug myself!"); - + if (from_tty) { exec_file = (char *) get_exec_file (0); - + if (exec_file) - printf ("Attaching to program `%s', %s\n", exec_file, target_pid_to_str (pid)); + printf_unfiltered ("Attaching to program: %s, %s\n", exec_file, + target_pid_to_str (pid_to_ptid (pid))); else - printf ("Attaching to %s\n", target_pid_to_str (pid)); - - fflush (stdout); + printf_unfiltered ("Attaching to %s\n", + target_pid_to_str (pid_to_ptid (pid))); + + gdb_flush (gdb_stdout); } attach (pid); - inferior_pid = pid; - push_target (&child_ops); -#endif /* ATTACH_DETACH */ + + inferior_ptid = pid_to_ptid (pid); + push_target (&deprecated_child_ops); + + /* Do this first, before anything has had a chance to query the + inferior's symbol table or similar. */ + observer_notify_inferior_created (¤t_target, from_tty); } +#if !defined(CHILD_POST_ATTACH) +void +child_post_attach (int pid) +{ + /* This version of Unix doesn't require a meaningful "post attach" + operation by a debugger. */ +} +#endif /* Take a program previously attached to and detaches it. The program resumes execution and will no longer stop @@ -152,31 +235,27 @@ child_attach (args, from_tty) started via the normal ptrace (PTRACE_TRACEME). */ static void -child_detach (args, from_tty) - char *args; - int from_tty; +child_detach (char *args, int from_tty) { int siggnal = 0; - -#ifdef ATTACH_DETACH + int pid = PIDGET (inferior_ptid); + if (from_tty) { char *exec_file = get_exec_file (0); if (exec_file == 0) exec_file = ""; - printf ("Detaching from program: %s %s\n", exec_file, - target_pid_to_str (inferior_pid)); - fflush (stdout); + printf_unfiltered ("Detaching from program: %s, %s\n", exec_file, + target_pid_to_str (pid_to_ptid (pid))); + gdb_flush (gdb_stdout); } if (args) siggnal = atoi (args); detach (siggnal); - inferior_pid = 0; - unpush_target (&child_ops); /* Pop out of handling an inferior */ -#else - error ("This version of Unix does not support detaching a process."); -#endif + + inferior_ptid = null_ptid; + unpush_target (&deprecated_child_ops); } /* Get ready to modify the registers array. On machines which store @@ -186,7 +265,7 @@ child_detach (args, from_tty) debugged. */ static void -child_prepare_to_store () +child_prepare_to_store (void) { #ifdef CHILD_PREPARE_TO_STORE CHILD_PREPARE_TO_STORE (); @@ -196,18 +275,14 @@ child_prepare_to_store () /* Print status information about what we're accessing. */ static void -child_files_info (ignore) - struct target_ops *ignore; +child_files_info (struct target_ops *ignore) { - printf ("\tUsing the running image of %s %s.\n", - attach_flag? "attached": "child", target_pid_to_str (inferior_pid)); + printf_unfiltered ("\tUsing the running image of %s %s.\n", + attach_flag ? "attached" : "child", target_pid_to_str (inferior_ptid)); } -/* ARGSUSED */ static void -child_open (arg, from_tty) - char *arg; - int from_tty; +child_open (char *arg, int from_tty) { error ("Use the \"run\" command to start a Unix child process."); } @@ -216,95 +291,374 @@ child_open (arg, from_tty) by its parent process. */ static void -ptrace_me () +ptrace_me (void) { /* "Trace me, Dr. Memory!" */ - call_ptrace (0, 0, (PTRACE_ARG3_TYPE) 0, 0); + call_ptrace (0, 0, (PTRACE_TYPE_ARG3) 0, 0); } /* Stub function which causes the GDB that runs it, to start ptrace-ing the child process. */ static void -ptrace_him (pid) - int pid; +ptrace_him (int pid) { - push_target (&child_ops); + push_target (&deprecated_child_ops); + + /* On some targets, there must be some explicit synchronization + between the parent and child processes after the debugger + forks, and before the child execs the debuggee program. This + call basically gives permission for the child to exec. + */ + + target_acknowledge_created_inferior (pid); + + /* START_INFERIOR_TRAPS_EXPECTED is defined in inferior.h, + * and will be 1 or 2 depending on whether we're starting + * without or with a shell. + */ + startup_inferior (START_INFERIOR_TRAPS_EXPECTED); + + /* On some targets, there must be some explicit actions taken after + the inferior has been started up. + */ + target_post_startup_inferior (pid_to_ptid (pid)); } -/* Start an inferior Unix child process and sets inferior_pid to its pid. +/* Start an inferior Unix child process and sets inferior_ptid to its pid. EXEC_FILE is the file to run. ALLARGS is a string containing the arguments to the program. ENV is the environment vector to pass. Errors reported with error(). */ static void -child_create_inferior (exec_file, allargs, env) - char *exec_file; - char *allargs; - char **env; +child_create_inferior (char *exec_file, char *allargs, char **env, + int from_tty) { - fork_inferior (exec_file, allargs, env, ptrace_me, ptrace_him); +#ifdef HPUXHPPA + fork_inferior (exec_file, allargs, env, ptrace_me, ptrace_him, pre_fork_inferior, NULL); +#else + fork_inferior (exec_file, allargs, env, ptrace_me, ptrace_him, NULL, NULL); +#endif /* We are at the first instruction we care about. */ + observer_notify_inferior_created (¤t_target, from_tty); /* Pedal to the metal... */ - proceed ((CORE_ADDR) -1, 0, 0); + proceed ((CORE_ADDR) -1, TARGET_SIGNAL_0, 0); } +#if !defined(CHILD_POST_STARTUP_INFERIOR) +void +child_post_startup_inferior (ptid_t ptid) +{ + /* This version of Unix doesn't require a meaningful "post startup inferior" + operation by a debugger. + */ +} +#endif + +#if !defined(CHILD_ACKNOWLEDGE_CREATED_INFERIOR) +void +child_acknowledge_created_inferior (int pid) +{ + /* This version of Unix doesn't require a meaningful "acknowledge created inferior" + operation by a debugger. + */ +} +#endif + + +#if !defined(CHILD_INSERT_FORK_CATCHPOINT) +int +child_insert_fork_catchpoint (int pid) +{ + /* This version of Unix doesn't support notification of fork events. */ + return 0; +} +#endif + +#if !defined(CHILD_REMOVE_FORK_CATCHPOINT) +int +child_remove_fork_catchpoint (int pid) +{ + /* This version of Unix doesn't support notification of fork events. */ + return 0; +} +#endif + +#if !defined(CHILD_INSERT_VFORK_CATCHPOINT) +int +child_insert_vfork_catchpoint (int pid) +{ + /* This version of Unix doesn't support notification of vfork events. */ + return 0; +} +#endif + +#if !defined(CHILD_REMOVE_VFORK_CATCHPOINT) +int +child_remove_vfork_catchpoint (int pid) +{ + /* This version of Unix doesn't support notification of vfork events. */ + return 0; +} +#endif + +#if !defined(CHILD_FOLLOW_FORK) +int +child_follow_fork (int follow_child) +{ + /* This version of Unix doesn't support following fork or vfork events. */ + return 0; +} +#endif + +#if !defined(CHILD_INSERT_EXEC_CATCHPOINT) +int +child_insert_exec_catchpoint (int pid) +{ + /* This version of Unix doesn't support notification of exec events. */ + return 0; +} +#endif + +#if !defined(CHILD_REMOVE_EXEC_CATCHPOINT) +int +child_remove_exec_catchpoint (int pid) +{ + /* This version of Unix doesn't support notification of exec events. */ + return 0; +} +#endif + +#if !defined(CHILD_REPORTED_EXEC_EVENTS_PER_EXEC_CALL) +int +child_reported_exec_events_per_exec_call (void) +{ + /* This version of Unix doesn't support notification of exec events. + */ + return 1; +} +#endif + +#if !defined(CHILD_HAS_EXITED) +int +child_has_exited (int pid, int wait_status, int *exit_status) +{ + if (WIFEXITED (wait_status)) + { + *exit_status = WEXITSTATUS (wait_status); + return 1; + } + + if (WIFSIGNALED (wait_status)) + { + *exit_status = 0; /* ?? Don't know what else to say here. */ + return 1; + } + + /* ?? Do we really need to consult the event state, too? Assume the + wait_state alone suffices. + */ + return 0; +} +#endif + + static void -child_mourn_inferior () +child_mourn_inferior (void) { - unpush_target (&child_ops); + unpush_target (&deprecated_child_ops); generic_mourn_inferior (); } static int -child_can_run () -{ - return(1); -} - -struct target_ops child_ops = { - "child", /* to_shortname */ - "Unix child process", /* to_longname */ - "Unix child process (started by the \"run\" command).", /* to_doc */ - child_open, /* to_open */ - 0, /* to_close */ - child_attach, /* to_attach */ - child_detach, /* to_detach */ - child_resume, /* to_resume */ - child_wait, /* to_wait */ - fetch_inferior_registers, /* to_fetch_registers */ - store_inferior_registers, /* to_store_registers */ - child_prepare_to_store, /* to_prepare_to_store */ - child_xfer_memory, /* to_xfer_memory */ - child_files_info, /* to_files_info */ - memory_insert_breakpoint, /* to_insert_breakpoint */ - memory_remove_breakpoint, /* to_remove_breakpoint */ - terminal_init_inferior, /* to_terminal_init */ - terminal_inferior, /* to_terminal_inferior */ - terminal_ours_for_output, /* to_terminal_ours_for_output */ - terminal_ours, /* to_terminal_ours */ - child_terminal_info, /* to_terminal_info */ - kill_inferior, /* to_kill */ - 0, /* to_load */ - 0, /* to_lookup_symbol */ - child_create_inferior, /* to_create_inferior */ - child_mourn_inferior, /* to_mourn_inferior */ - child_can_run, /* to_can_run */ - 0, /* to_notice_signals */ - process_stratum, /* to_stratum */ - 0, /* to_next */ - 1, /* to_has_all_memory */ - 1, /* to_has_memory */ - 1, /* to_has_stack */ - 1, /* to_has_registers */ - 1, /* to_has_execution */ - 0, /* sections */ - 0, /* sections_end */ - OPS_MAGIC /* to_magic */ -}; +child_can_run (void) +{ + /* This variable is controlled by modules that sit atop inftarg that may layer + their own process structure atop that provided here. hpux-thread.c does + this because of the Hpux user-mode level thread model. */ + + return !child_suppress_run; +} + +/* Send a SIGINT to the process group. This acts just like the user typed a + ^C on the controlling terminal. + + XXX - This may not be correct for all systems. Some may want to use + killpg() instead of kill (-pgrp). */ + +static void +child_stop (void) +{ + kill (-inferior_process_group, SIGINT); +} + +#if !defined(CHILD_ENABLE_EXCEPTION_CALLBACK) +struct symtab_and_line * +child_enable_exception_callback (enum exception_event_kind kind, int enable) +{ + return (struct symtab_and_line *) NULL; +} +#endif + +#if !defined(CHILD_GET_CURRENT_EXCEPTION_EVENT) +struct exception_event_record * +child_get_current_exception_event (void) +{ + return (struct exception_event_record *) NULL; +} +#endif + + +#if !defined(CHILD_PID_TO_EXEC_FILE) +char * +child_pid_to_exec_file (int pid) +{ + /* This version of Unix doesn't support translation of a process ID + to the filename of the executable file. + */ + return NULL; +} +#endif + +char * +child_core_file_to_sym_file (char *core) +{ + /* The target stratum for a running executable need not support + this operation. + */ + return NULL; +} + +/* Perform a partial transfer to/from the specified object. For + memory transfers, fall back to the old memory xfer functions. */ + +static LONGEST +child_xfer_partial (struct target_ops *ops, enum target_object object, + const char *annex, void *readbuf, + const void *writebuf, ULONGEST offset, LONGEST len) +{ + switch (object) + { + case TARGET_OBJECT_MEMORY: + if (readbuf) + return child_xfer_memory (offset, readbuf, len, 0/*write*/, + NULL, ops); + if (writebuf) + return child_xfer_memory (offset, (void *) writebuf, len, 1/*write*/, + NULL, ops); + return -1; + + case TARGET_OBJECT_UNWIND_TABLE: +#ifndef NATIVE_XFER_UNWIND_TABLE +#define NATIVE_XFER_UNWIND_TABLE(OPS,OBJECT,ANNEX,WRITEBUF,READBUF,OFFSET,LEN) (-1) +#endif + return NATIVE_XFER_UNWIND_TABLE (ops, object, annex, readbuf, writebuf, + offset, len); + + case TARGET_OBJECT_AUXV: +#ifndef NATIVE_XFER_AUXV +#define NATIVE_XFER_AUXV(OPS,OBJECT,ANNEX,WRITEBUF,READBUF,OFFSET,LEN) (-1) +#endif + return NATIVE_XFER_AUXV (ops, object, annex, readbuf, writebuf, + offset, len); + + case TARGET_OBJECT_WCOOKIE: +#ifndef NATIVE_XFER_WCOOKIE +#define NATIVE_XFER_WCOOKIE(OPS,OBJECT,ANNEX,WRITEBUF,READBUF,OFFSET,LEN) (-1) +#endif + return NATIVE_XFER_WCOOKIE (ops, object, annex, readbuf, writebuf, + offset, len); + + default: + return -1; + } +} + +#if !defined(CHILD_PID_TO_STR) +char * +child_pid_to_str (ptid_t ptid) +{ + return normal_pid_to_str (ptid); +} +#endif + +static void +init_child_ops (void) +{ + deprecated_child_ops.to_shortname = "child"; + deprecated_child_ops.to_longname = "Unix child process"; + deprecated_child_ops.to_doc = "Unix child process (started by the \"run\" command)."; + deprecated_child_ops.to_open = child_open; + deprecated_child_ops.to_attach = child_attach; + deprecated_child_ops.to_post_attach = child_post_attach; + deprecated_child_ops.to_detach = child_detach; + deprecated_child_ops.to_resume = child_resume; + deprecated_child_ops.to_wait = child_wait; + deprecated_child_ops.to_fetch_registers = fetch_inferior_registers; + deprecated_child_ops.to_store_registers = store_inferior_registers; + deprecated_child_ops.to_prepare_to_store = child_prepare_to_store; + deprecated_child_ops.deprecated_xfer_memory = child_xfer_memory; + deprecated_child_ops.to_xfer_partial = child_xfer_partial; + deprecated_child_ops.to_files_info = child_files_info; + deprecated_child_ops.to_insert_breakpoint = memory_insert_breakpoint; + deprecated_child_ops.to_remove_breakpoint = memory_remove_breakpoint; + deprecated_child_ops.to_terminal_init = terminal_init_inferior; + deprecated_child_ops.to_terminal_inferior = terminal_inferior; + deprecated_child_ops.to_terminal_ours_for_output = terminal_ours_for_output; + deprecated_child_ops.to_terminal_save_ours = terminal_save_ours; + deprecated_child_ops.to_terminal_ours = terminal_ours; + deprecated_child_ops.to_terminal_info = child_terminal_info; + deprecated_child_ops.to_kill = kill_inferior; + deprecated_child_ops.to_create_inferior = child_create_inferior; + deprecated_child_ops.to_post_startup_inferior = child_post_startup_inferior; + deprecated_child_ops.to_acknowledge_created_inferior = child_acknowledge_created_inferior; + deprecated_child_ops.to_insert_fork_catchpoint = child_insert_fork_catchpoint; + deprecated_child_ops.to_remove_fork_catchpoint = child_remove_fork_catchpoint; + deprecated_child_ops.to_insert_vfork_catchpoint = child_insert_vfork_catchpoint; + deprecated_child_ops.to_remove_vfork_catchpoint = child_remove_vfork_catchpoint; + deprecated_child_ops.to_follow_fork = child_follow_fork; + deprecated_child_ops.to_insert_exec_catchpoint = child_insert_exec_catchpoint; + deprecated_child_ops.to_remove_exec_catchpoint = child_remove_exec_catchpoint; + deprecated_child_ops.to_reported_exec_events_per_exec_call = child_reported_exec_events_per_exec_call; + deprecated_child_ops.to_has_exited = child_has_exited; + deprecated_child_ops.to_mourn_inferior = child_mourn_inferior; + deprecated_child_ops.to_can_run = child_can_run; + deprecated_child_ops.to_thread_alive = child_thread_alive; + deprecated_child_ops.to_pid_to_str = child_pid_to_str; + deprecated_child_ops.to_stop = child_stop; + deprecated_child_ops.to_enable_exception_callback = child_enable_exception_callback; + deprecated_child_ops.to_get_current_exception_event = child_get_current_exception_event; + deprecated_child_ops.to_pid_to_exec_file = child_pid_to_exec_file; + deprecated_child_ops.to_stratum = process_stratum; + deprecated_child_ops.to_has_all_memory = 1; + deprecated_child_ops.to_has_memory = 1; + deprecated_child_ops.to_has_stack = 1; + deprecated_child_ops.to_has_registers = 1; + deprecated_child_ops.to_has_execution = 1; + deprecated_child_ops.to_magic = OPS_MAGIC; +} void -_initialize_inftarg () +_initialize_inftarg (void) { - add_target (&child_ops); +#ifdef HAVE_OPTIONAL_PROC_FS + char procname[32]; + int fd; + + /* If we have an optional /proc filesystem (e.g. under OSF/1), + don't add ptrace support if we can access the running GDB via /proc. */ +#ifndef PROC_NAME_FMT +#define PROC_NAME_FMT "/proc/%05d" +#endif + sprintf (procname, PROC_NAME_FMT, getpid ()); + fd = open (procname, O_RDONLY); + if (fd >= 0) + { + close (fd); + return; + } +#endif + + init_child_ops (); + add_target (&deprecated_child_ops); }