-/* Subroutines for handling an "inferior" (child) process as a target
- for debugging, in GDB.
- Copyright 1990, 1991 Free Software Foundation, Inc.
+/* Target-vector operations for controlling Unix child processes, for GDB.
+ Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996
+ Free Software Foundation, Inc.
Contributed by Cygnus Support.
+## Contains temporary hacks..
+
This file is part of GDB.
-GDB is free software; you can redistribute it and/or modify
+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 1, or (at your option)
-any later version.
+the Free Software Foundation; either version 2 of the License, or
+(at your option) any later version.
-GDB is distributed in the hope that it will be useful,
+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 GDB; see the file COPYING. If not, write to
-the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
+along with this program; if not, write to the Free Software
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
-#include <stdio.h>
#include "defs.h"
-#include "param.h"
#include "frame.h" /* required by inferior.h */
#include "inferior.h"
#include "target.h"
-#include "wait.h"
#include "gdbcore.h"
-#include "ieee-float.h" /* Required by REGISTER_CONVERT_TO_XXX */
-
-extern int fetch_inferior_registers();
-extern int store_inferior_registers();
-extern int child_xfer_memory();
-extern int memory_insert_breakpoint(), memory_remove_breakpoint();
-extern void terminal_init_inferior(), terminal_ours(), terminal_inferior();
-extern void terminal_ours_for_output(), child_terminal_info();
-extern void kill_inferior(), add_syms_addr_command();
-extern struct value *call_function_by_hand();
-extern void child_resume();
-extern void child_create_inferior();
-extern void child_mourn_inferior();
-extern void child_attach ();
+#include "command.h"
+#include "gdb_stat.h"
+#include <signal.h>
+#include <sys/types.h>
+#include <fcntl.h>
+
+#ifdef HAVE_WAIT_H
+# include <wait.h>
+#else
+# ifdef HAVE_SYS_WAIT_H
+# include <sys/wait.h>
+# endif
+#endif
+
+/* "wait.h" fills in the gaps left by <wait.h> */
+#include "wait.h"
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+
+extern struct symtab_and_line *
+child_enable_exception_callback PARAMS ((enum exception_event_kind, int));
+
+extern struct exception_event_record *
+child_get_current_exception_event PARAMS ((void));
+
+static void
+child_prepare_to_store PARAMS ((void));
+
+#ifndef CHILD_WAIT
+static int child_wait PARAMS ((int, struct target_waitstatus *));
+#endif /* CHILD_WAIT */
+
+#if !defined(CHILD_POST_WAIT)
+void
+child_post_wait PARAMS ((int, int));
+#endif
+
+static void child_open PARAMS ((char *, int));
+
+static void
+child_files_info PARAMS ((struct target_ops *));
+
+static void
+child_detach PARAMS ((char *, int));
+
+static void
+child_detach_from_process PARAMS ((int, char *, int, int));
+
+static void
+child_attach PARAMS ((char *, int));
+
+static void
+child_attach_to_process PARAMS ((char *, int, int));
+
+#if !defined(CHILD_POST_ATTACH)
+static void
+child_post_attach PARAMS ((int));
+#endif
+
+static void
+child_require_attach PARAMS ((char *, int));
+
+static void
+child_require_detach PARAMS ((int, char *, int));
+
+static void
+ptrace_me PARAMS ((void));
+
+static void
+ptrace_him PARAMS ((int));
+
+static void
+child_create_inferior PARAMS ((char *, char *, char **));
+
+static void
+child_mourn_inferior PARAMS ((void));
+
+static int
+child_can_run PARAMS ((void));
+
+static void
+child_stop PARAMS ((void));
+
+#ifndef CHILD_THREAD_ALIVE
+int child_thread_alive PARAMS ((int));
+#endif
+
+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
+
+/*##*/
+/* Enable HACK for ttrace work. In
+ * infttrace.c/require_notification_of_events,
+ * this is set to 0 so that the loop in child_wait
+ * won't loop.
+ */
+int not_same_real_pid = 1;
+/*##*/
+
+
/* 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. */
-int
-child_wait (status)
- int *status;
+static int
+child_wait (pid, ourstatus)
+ int pid;
+ struct target_waitstatus *ourstatus;
{
- int pid;
+ int save_errno;
+ int status;
+ char * execd_pathname;
+ int exit_status;
+ int related_pid;
+ int syscall_id;
+ enum target_waitkind kind;
do {
- pid = wait (status);
- if (pid == -1) /* No more children to wait for */
+ set_sigint_trap(); /* Causes SIGINT to be passed on to the
+ attached process. */
+ set_sigio_trap ();
+
+ pid = proc_wait (inferior_pid, &status);
+
+ save_errno = errno;
+
+ clear_sigio_trap ();
+
+ clear_sigint_trap();
+
+ if (pid == -1)
{
- fprintf (stderr, "Child process unexpectedly missing.\n");
- *status = 42; /* Claim it exited with signal 42 */
+ if (save_errno == EINTR)
+ continue;
+
+ fprintf_unfiltered (gdb_stderr, "Child process unexpectedly missing: %s.\n",
+ safe_strerror (save_errno));
+
+ /* Claim it exited with unknown signal. */
+ ourstatus->kind = TARGET_WAITKIND_SIGNALLED;
+ ourstatus->value.sig = TARGET_SIGNAL_UNKNOWN;
return -1;
}
- } while (pid != inferior_pid); /* Some other child died or stopped */
+
+ /* Did it exit?
+ */
+ if (target_has_exited (pid, status, &exit_status))
+ {
+ /* ??rehrauer: For now, ignore this. */
+ continue;
+ }
+
+ if (!target_thread_alive (pid))
+ {
+ ourstatus->kind = TARGET_WAITKIND_SPURIOUS;
+ return pid;
+ }
+
+ if (target_has_forked (pid, &related_pid)
+ && (pid == inferior_pid) || (related_pid == inferior_pid))
+ {
+ ourstatus->kind = TARGET_WAITKIND_FORKED;
+ ourstatus->value.related_pid = related_pid;
+ return pid;
+ }
+
+ if (target_has_vforked (pid, &related_pid)
+ && (pid == inferior_pid) || (related_pid == inferior_pid))
+ {
+ ourstatus->kind = TARGET_WAITKIND_VFORKED;
+ ourstatus->value.related_pid = related_pid;
+ return pid;
+ }
+
+ if (target_has_execd (pid, &execd_pathname))
+ {
+ /* Are we ignoring initial exec events? (This is likely because
+ we're in the process of starting up the inferior, and another
+ (older) mechanism handles those.) If so, we'll report this
+ as a regular stop, not an exec.
+ */
+ if (inferior_ignoring_startup_exec_events)
+ {
+ inferior_ignoring_startup_exec_events--;
+ }
+ else
+ {
+ ourstatus->kind = TARGET_WAITKIND_EXECD;
+ ourstatus->value.execd_pathname = execd_pathname;
+ return pid;
+ }
+ }
+
+ /* All we must do with these is communicate their occurrence
+ to wait_for_inferior...
+ */
+ if (target_has_syscall_event (pid, &kind, &syscall_id))
+ {
+ ourstatus->kind = kind;
+ ourstatus->value.syscall_id = syscall_id;
+ return pid;
+ }
+
+/*## } while (pid != inferior_pid); ##*/ /* Some other child died or stopped */
+/* hack for thread testing */
+ } while( (pid != inferior_pid) && not_same_real_pid );
+/*##*/
+
+ store_waitstatus (ourstatus, status);
return pid;
}
+#endif /* CHILD_WAIT */
+
+#if !defined(CHILD_POST_WAIT)
+void
+child_post_wait (pid, wait_status)
+ int pid;
+ int wait_status;
+{
+ /* This version of Unix doesn't require a meaningful "post wait"
+ operation.
+ */
+}
+#endif
+
+#ifndef CHILD_THREAD_ALIVE
-/*
- * child_detach()
- * takes a program previously attached to and detaches it.
- * The program resumes execution and will no longer stop
- * on signals, etc. We better not have left any breakpoints
- * in the program or it'll die when it hits one. For this
- * to work, it may be necessary for the process to have been
- * previously attached. It *might* work if the program was
- * started via the normal ptrace (PTRACE_TRACEME).
- */
+/* 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 (pid)
+ int pid;
+{
+ return (kill (pid, 0) != -1);
+}
+
+#endif
static void
-child_detach (args, from_tty)
+child_attach_to_process (args, from_tty, after_fork)
+ char * args;
+ int from_tty;
+ int after_fork;
+{
+ if (!args)
+ error_no_arg ("process-id to attach");
+
+#ifndef ATTACH_DETACH
+ error ("Can't attach to a process on this machine.");
+#else
+ {
+ char *exec_file;
+ int pid;
+ struct target_waitstatus *wstatus;
+ char * dummy;
+
+ 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 (after_fork)
+ printf_unfiltered ("Attaching after fork to %s\n",
+ target_pid_to_str (pid));
+ else if (exec_file)
+ printf_unfiltered ("Attaching to program: %s, %s\n", exec_file,
+ target_pid_to_str (pid));
+ else
+ printf_unfiltered ("Attaching to %s\n", target_pid_to_str (pid));
+
+ gdb_flush (gdb_stdout);
+ }
+
+ if (!after_fork)
+ attach (pid);
+ else
+ REQUIRE_ATTACH (pid);
+
+ inferior_pid = pid;
+ push_target (&child_ops);
+ }
+#endif /* ATTACH_DETACH */
+}
+
+
+/* Attach to process PID, then initialize for debugging it. */
+
+static void
+child_attach (args, from_tty)
+ char *args;
+ int from_tty;
+{
+ child_attach_to_process (args, from_tty, 0);
+}
+
+#if !defined(CHILD_POST_ATTACH)
+static void
+child_post_attach (pid)
+ int pid;
+{
+ /* This version of Unix doesn't require a meaningful "post attach"
+ operation by a debugger.
+ */
+}
+#endif
+
+
+static void
+child_require_attach (args, from_tty)
char *args;
int from_tty;
{
- int siggnal = 0;
+ child_attach_to_process (args, from_tty, 1);
+}
+static void
+child_detach_from_process (pid, args, from_tty, after_fork)
+ int pid;
+ char * args;
+ int from_tty;
+ int after_fork;
+{
#ifdef ATTACH_DETACH
- if (from_tty)
- {
- char *exec_file = get_exec_file (0);
- if (exec_file == 0)
- exec_file = "";
- printf ("Detaching program: %s pid %d\n",
- exec_file, inferior_pid);
- fflush (stdout);
- }
- if (args)
- siggnal = atoi (args);
-
- detach (siggnal);
- inferior_pid = 0;
- unpush_target (&child_ops); /* Pop out of handling an inferior */
+ {
+ int siggnal = 0;
+
+ if (from_tty)
+ {
+ char *exec_file = get_exec_file (0);
+ if (exec_file == 0)
+ exec_file = "";
+ if (after_fork)
+ printf_unfiltered ("Detaching after fork from %s\n",
+ target_pid_to_str (pid));
+ else
+ printf_unfiltered ("Detaching from program: %s, %s\n", exec_file,
+ target_pid_to_str (pid));
+ gdb_flush (gdb_stdout);
+ }
+ if (args)
+ siggnal = atoi (args);
+
+ if (!after_fork)
+ detach (siggnal);
+ else
+ REQUIRE_DETACH (pid, siggnal);
+ }
#else
- error ("This version of Unix does not support detaching a process.");
+ error ("This version of Unix does not support detaching a process.");
#endif
}
+/* Take a program previously attached to and detaches it.
+ The program resumes execution and will no longer stop
+ on signals, etc. We'd better not have left any breakpoints
+ in the program or it'll die when it hits one. For this
+ to work, it may be necessary for the process to have been
+ previously attached. It *might* work if the program was
+ started via the normal ptrace (PTRACE_TRACEME). */
+
+static void
+child_detach (args, from_tty)
+ char *args;
+ int from_tty;
+{
+ child_detach_from_process (inferior_pid, args, from_tty, 0);
+ inferior_pid = 0;
+ unpush_target (&child_ops);
+}
+
+static void
+child_require_detach (pid, args, from_tty)
+ int pid;
+ char * args;
+ int from_tty;
+{
+ child_detach_from_process (pid, args, from_tty, 1);
+}
+
+
/* Get ready to modify the registers array. On machines which store
individual registers, this doesn't need to do anything. On machines
which store all the registers in one fell swoop, this makes sure
that registers contains all the registers from the program being
debugged. */
-void
+static void
child_prepare_to_store ()
{
#ifdef CHILD_PREPARE_TO_STORE
#endif
}
-/* Convert data from raw format for register REGNUM
- to virtual format for register REGNUM. */
+/* Print status information about what we're accessing. */
+
+static void
+child_files_info (ignore)
+ struct target_ops *ignore;
+{
+ printf_unfiltered ("\tUsing the running image of %s %s.\n",
+ attach_flag? "attached": "child", target_pid_to_str (inferior_pid));
+}
+
+/* ARGSUSED */
+static void
+child_open (arg, from_tty)
+ char *arg;
+ int from_tty;
+{
+ error ("Use the \"run\" command to start a Unix child process.");
+}
+
+/* Stub function which causes the inferior that runs it, to be ptrace-able
+ by its parent process. */
+
+static void
+ptrace_me ()
+{
+ /* "Trace me, Dr. Memory!" */
+ call_ptrace (0, 0, (PTRACE_ARG3_TYPE) 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;
+{
+ push_target (&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);
+}
+
+/* Start an inferior Unix child process and sets inferior_pid 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;
+{
+
+#ifdef HPUXHPPA
+ char *tryname;
+ char *shell_file;
+ char *p;
+ char *p1;
+ char *path = getenv ("PATH");
+ int len;
+ struct stat statbuf;
+
+ /* On HP-UX, we have a possible bad interaction between
+ * the start-up-with-shell code and our catch-fork/catch-exec
+ * logic. To avoid the bad interaction, we start up with the
+ * C shell ("csh") and pass it the "-f" flag (fast start-up,
+ * don't run .cshrc code).
+ * See further comments in inferior.h toward the bottom
+ * (STARTUP_WITH_SHELL flag) and in fork-child.c
+ */
+
+ /* Rather than passing in a hard-wired path like "/bin/csh",
+ * we look down the PATH to find csh. I took this code from
+ * procfs.c, which is the file in the Sun-specific part of GDB
+ * analogous to inftarg.c. See procfs.c for more detailed
+ * comments. - RT
+ */
+ shell_file = "csh";
+ if (path == NULL)
+ path = "/bin:/usr/bin";
+ tryname = alloca (strlen (path) + strlen (shell_file) + 2);
+ for (p = path; p != NULL; p = p1 ? p1 + 1: NULL)
+ {
+ p1 = strchr (p, ':');
+ if (p1 != NULL)
+ len = p1 - p;
+ else
+ len = strlen (p);
+ strncpy (tryname, p, len);
+ tryname[len] = '\0';
+ strcat (tryname, "/");
+ strcat (tryname, shell_file);
+ if (access (tryname, X_OK) < 0)
+ continue;
+ if (stat (tryname, &statbuf) < 0)
+ continue;
+ if (!S_ISREG (statbuf.st_mode))
+ /* We certainly need to reject directories. I'm not quite
+ as sure about FIFOs, sockets, etc., but I kind of doubt
+ that people want to exec() these things. */
+ continue;
+ break;
+ }
+ if (p == NULL)
+ /* Not found. I replaced the error() which existed in procfs.c
+ * with simply passing in NULL and hoping fork_inferior()
+ * can deal with it. - RT
+ */
+ /* error ("Can't find shell %s in PATH", shell_file); */
+ shell_file = NULL;
+ else
+ shell_file = tryname;
+
+ 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. */
+ /* Pedal to the metal... */
+ proceed ((CORE_ADDR) -1, TARGET_SIGNAL_0, 0);
+}
+
+#if !defined(CHILD_POST_STARTUP_INFERIOR)
+void
+child_post_startup_inferior (pid)
+ int pid;
+{
+ /* This version of Unix doesn't require a meaningful "post startup inferior"
+ operation by a debugger.
+ */
+}
+#endif
+
+#if !defined(CHILD_ACKNOWLEDGE_CREATED_INFERIOR)
void
-host_convert_to_virtual (regnum, from, to)
- int regnum;
- char *from;
- char *to;
+child_acknowledge_created_inferior (pid)
+ int pid;
{
- REGISTER_CONVERT_TO_VIRTUAL (regnum, from, to);
+ /* This version of Unix doesn't require a meaningful "acknowledge created inferior"
+ operation by a debugger.
+ */
}
+#endif
-/* Convert data from virtual format for register REGNUM
- to raw format for register REGNUM. */
void
-host_convert_from_virtual (regnum, from, to)
- int regnum;
- char *from;
- char *to;
+child_clone_and_follow_inferior (child_pid, followed_child)
+ int child_pid;
+ int *followed_child;
{
- REGISTER_CONVERT_TO_RAW (regnum, from, to);
+ clone_and_follow_inferior (child_pid, followed_child);
+
+ /* Don't resume CHILD_PID; it's stopped where it ought to be, until
+ the decision gets made elsewhere how to continue it.
+ */
}
-/* Print status information about what we're accessing. */
+
+#if !defined(CHILD_POST_FOLLOW_INFERIOR_BY_CLONE)
+void
+child_post_follow_inferior_by_clone ()
+{
+ /* This version of Unix doesn't require a meaningful "post follow inferior"
+ operation by a clone debugger.
+ */
+}
+#endif
+
+
+#if !defined(CHILD_INSERT_FORK_CATCHPOINT)
+int
+child_insert_fork_catchpoint (pid)
+ int pid;
+{
+ /* This version of Unix doesn't support notification of fork events.
+ */
+}
+#endif
+
+
+#if !defined(CHILD_REMOVE_FORK_CATCHPOINT)
+int
+child_remove_fork_catchpoint (pid)
+ int pid;
+{
+ /* This version of Unix doesn't support notification of fork events.
+ */
+}
+#endif
+
+
+#if !defined(CHILD_INSERT_VFORK_CATCHPOINT)
+int
+child_insert_vfork_catchpoint (pid)
+ int pid;
+{
+ /* This version of Unix doesn't support notification of vfork events.
+ */
+}
+#endif
+
+
+#if !defined(CHILD_REMOVE_VFORK_CATCHPOINT)
+int
+child_remove_vfork_catchpoint (pid)
+ int pid;
+{
+ /* This version of Unix doesn't support notification of vfork events.
+ */
+}
+#endif
+
+
+#if !defined(CHILD_HAS_FORKED)
+int
+child_has_forked (pid, child_pid)
+ int pid;
+ int * child_pid;
+{
+ /* This version of Unix doesn't support notification of fork events.
+ */
+ return 0;
+}
+#endif
+
+
+#if !defined(CHILD_HAS_VFORKED)
+int
+child_has_vforked (pid, child_pid)
+ int pid;
+ int * child_pid;
+{
+ /* This version of Unix doesn't support notification of vfork events.
+ */
+ return 0;
+}
+#endif
+
+
+#if !defined(CHILD_CAN_FOLLOW_VFORK_PRIOR_TO_EXEC)
+int
+child_can_follow_vfork_prior_to_exec ()
+{
+ /* This version of Unix doesn't support notification of vfork events.
+ However, if it did, it probably wouldn't allow vforks to be followed
+ before the following exec.
+ */
+ return 0;
+}
+#endif
+
+
+#if !defined(CHILD_POST_FOLLOW_VFORK)
+void
+child_post_follow_vfork (parent_pid, followed_parent, child_pid, followed_child)
+ int parent_pid;
+ int followed_parent;
+ int child_pid;
+ int followed_child;
+{
+ /* This version of Unix doesn't require a meaningful "post follow vfork"
+ operation by a clone debugger.
+ */
+}
+#endif
+
+#if !defined(CHILD_INSERT_EXEC_CATCHPOINT)
+int
+child_insert_exec_catchpoint (pid)
+ int pid;
+{
+ /* This version of Unix doesn't support notification of exec events.
+ */
+}
+#endif
+
+
+#if !defined(CHILD_REMOVE_EXEC_CATCHPOINT)
+int
+child_remove_exec_catchpoint (pid)
+ int pid;
+{
+ /* This version of Unix doesn't support notification of exec events.
+ */
+}
+#endif
+
+
+#if !defined(CHILD_HAS_EXECD)
+int
+child_has_execd (pid, execd_pathname)
+ int pid;
+ char ** execd_pathname;
+{
+ /* 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 ()
+{
+ /* This version of Unix doesn't support notification of exec events.
+ */
+ return 1;
+}
+#endif
+
+
+#if !defined(CHILD_HAS_SYSCALL_EVENT)
+int
+child_has_syscall_event (pid, kind, syscall_id)
+ int pid;
+ enum target_waitkind * kind;
+ int * syscall_id;
+{
+ /* This version of Unix doesn't support notification of syscall events.
+ */
+ return 0;
+}
+#endif
+
+
+#if !defined(CHILD_HAS_EXITED)
+int
+child_has_exited (pid, wait_status, exit_status)
+ 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 ()
+{
+ /* FIXME: Should be in a header file */
+ extern void proc_remove_foreign PARAMS ((int));
+
+ unpush_target (&child_ops);
+ proc_remove_foreign (inferior_pid);
+ generic_mourn_inferior ();
+}
+
+static int
+child_can_run ()
+{
+ /* 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_files_info ()
+child_stop ()
{
- printf ("\tUsing the running image of %s process %d.\n",
- attach_flag? "attached": "child", inferior_pid);
+ extern pid_t inferior_process_group;
+
+ kill (-inferior_process_group, SIGINT);
}
+#if !defined(CHILD_ENABLE_EXCEPTION_CALLBACK)
+struct symtab_and_line *
+child_enable_exception_callback (kind, enable)
+ 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 ()
+{
+ return (struct exception_event_record *) NULL;
+}
+#endif
+
+
+#if !defined(CHILD_PID_TO_EXEC_FILE)
+char *
+child_pid_to_exec_file (pid)
+ 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 (core)
+ char * core;
+{
+ /* The target stratum for a running executable need not support
+ this operation.
+ */
+ return NULL;
+}
+
+
+\f
struct target_ops child_ops = {
- "child", "Unix child process",
- 0, 0, /* open, close */
- child_attach, child_detach,
- child_resume,
- child_wait,
- fetch_inferior_registers, store_inferior_registers,
- child_prepare_to_store,
- host_convert_to_virtual, host_convert_from_virtual,
- child_xfer_memory, child_files_info,
- memory_insert_breakpoint, memory_remove_breakpoint,
- terminal_init_inferior, terminal_inferior,
- terminal_ours_for_output, terminal_ours, child_terminal_info,
- kill_inferior, 0, add_syms_addr_command, /* load */
- call_function_by_hand,
- 0, /* lookup_symbol */
- child_create_inferior, child_mourn_inferior,
- process_stratum, 0, /* next */
- 1, 1, 1, 1, 1, /* all mem, mem, stack, regs, exec */
- OPS_MAGIC, /* Always the last thing */
+ "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_post_attach, /* to_post_attach */
+ child_require_attach, /* to_require_attach */
+ child_detach, /* to_detach */
+ child_require_detach, /* to_require_detach */
+ child_resume, /* to_resume */
+ child_wait, /* to_wait */
+ child_post_wait, /* to_post_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_post_startup_inferior, /* to_post_startup_inferior */
+ child_acknowledge_created_inferior, /* to_acknowledge_created_inferior */
+ child_clone_and_follow_inferior, /* to_clone_and_follow_inferior */
+ child_post_follow_inferior_by_clone, /* to_post_follow_inferior_by_clone */
+ child_insert_fork_catchpoint, /* to_insert_fork_catchpoint */
+ child_remove_fork_catchpoint, /* to_remove_fork_catchpoint */
+ child_insert_vfork_catchpoint, /* to_insert_vfork_catchpoint */
+ child_remove_vfork_catchpoint, /* to_remove_vfork_catchpoint */
+ child_has_forked, /* to_has_forked */
+ child_has_vforked, /* to_has_vforked */
+ child_can_follow_vfork_prior_to_exec, /* to_can_follow_vfork_prior_to_exec */
+ child_post_follow_vfork, /* to_post_follow_vfork */
+ child_insert_exec_catchpoint, /* to_insert_exec_catchpoint */
+ child_remove_exec_catchpoint, /* to_remove_exec_catchpoint */
+ child_has_execd, /* to_has_execd */
+ child_reported_exec_events_per_exec_call, /* to_reported_exec_events_per_exec_call */
+ child_has_syscall_event, /* to_has_syscall_event */
+ child_has_exited, /* to_has_exited */
+ child_mourn_inferior, /* to_mourn_inferior */
+ child_can_run, /* to_can_run */
+ 0, /* to_notice_signals */
+ child_thread_alive, /* to_thread_alive */
+ child_stop, /* to_stop */
+ child_enable_exception_callback, /* to_enable_exception_callback */
+ child_get_current_exception_event, /* to_get_current_exception_event */
+ child_pid_to_exec_file, /* to_pid_to_exec_file */
+ child_core_file_to_sym_file, /* to_core_file_to_sym_file */
+ 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, /* to_sections */
+ 0, /* to_sections_end */
+ OPS_MAGIC /* to_magic */
};
void
_initialize_inftarg ()
{
+#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 ());
+ if ((fd = open (procname, O_RDONLY)) >= 0)
+ {
+ close (fd);
+ return;
+ }
+#endif
+
add_target (&child_ops);
}
projects / deliverable / binutils-gdb.git / blobdiff