/* 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
+ Free Software Foundation, Inc.
Contributed by Cygnus Support.
-This file is part of GDB.
+ ## Contains temporary hacks..
-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 file is part of GDB.
-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 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.
-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. */
+ 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., 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 "ieee-float.h" /* Required by REGISTER_CONVERT_TO_XXX */
-#include "terminal.h" /* For #ifdef TIOCGPGRP and new_tty */
-
+#include "command.h"
+#include "gdb_stat.h"
#include <signal.h>
+#include <sys/types.h>
+#include <fcntl.h>
-#ifdef SET_STACK_LIMIT_HUGE
-#include <sys/time.h>
-#include <sys/resource.h>
+#include "gdb_wait.h"
-extern int original_stack_limit;
-#endif /* SET_STACK_LIMIT_HUGE */
+extern struct symtab_and_line *child_enable_exception_callback (enum
+ exception_event_kind,
+ int);
-static void
-child_prepare_to_store PARAMS ((void));
+extern struct exception_event_record
+ *child_get_current_exception_event (void);
-static int
-child_wait PARAMS ((int *));
+extern void _initialize_inftarg (void);
-static void
-child_open PARAMS ((char *, int));
+static void child_prepare_to_store (void);
-static void
-child_files_info PARAMS ((struct target_ops *));
+#ifndef CHILD_WAIT
+static int child_wait (int, struct target_waitstatus *);
+#endif /* CHILD_WAIT */
-static void
-child_detach PARAMS ((char *, int));
+#if !defined(CHILD_POST_WAIT)
+void child_post_wait (int, int);
+#endif
-static void
-child_attach PARAMS ((char *, int));
+static void child_open (char *, int);
-static void
-child_create_inferior PARAMS ((char *, char *, char **));
+static void child_files_info (struct target_ops *);
-static void
-child_mourn_inferior PARAMS ((void));
+static void child_detach (char *, int);
-static int
-child_can_run PARAMS ((void));
+static void child_detach_from_process (int, char *, int, int);
+
+static void child_attach (char *, int);
+
+static void child_attach_to_process (char *, int, int);
+
+#if !defined(CHILD_POST_ATTACH)
+extern void child_post_attach (int);
+#endif
+
+static void child_require_attach (char *, int);
+
+static void child_require_detach (int, char *, int);
+
+static void ptrace_me (void);
+
+static void ptrace_him (int);
+
+static void child_create_inferior (char *, char *, char **);
+
+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 (int);
+#endif
+
+static void init_child_ops (void);
extern char **environ;
-/* Forward declaration */
-extern struct target_ops child_ops;
+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. */
static int
-child_wait (status)
- int *status;
+child_wait (int pid, struct target_waitstatus *ourstatus)
{
- int pid;
+ int save_errno;
+ int status;
+ char *execd_pathname = NULL;
+ int exit_status;
+ int related_pid;
+ int syscall_id;
+ enum target_waitkind kind;
+
+ do
+ {
+ set_sigint_trap (); /* Causes SIGINT to be passed on to the
+ attached process. */
+ set_sigio_trap ();
- do {
-#ifdef USE_PROC_FS
- pid = proc_wait (status);
-#else
- pid = wait (status);
-#endif
- if (pid == -1) /* No more children to wait for */
- {
- fprintf (stderr, "Child process unexpectedly missing.\n");
- *status = 42; /* Claim it exited with signal 42 */
- return -1;
- }
- } while (pid != inferior_pid); /* Some other child died or stopped */
+ pid = ptrace_wait (inferior_pid, &status);
+
+ save_errno = errno;
+
+ clear_sigio_trap ();
+
+ clear_sigint_trap ();
+
+ if (pid == -1)
+ {
+ 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;
+ }
+
+ /* 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 (int pid, int wait_status)
+{
+ /* This version of Unix doesn't require a meaningful "post wait"
+ operation.
+ */
+}
+#endif
-/* Attach to process PID, then initialize for debugging it. */
-static void
-child_attach (args, from_tty)
- char *args;
- int from_tty;
+#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 (int pid)
{
- char *exec_file;
- int pid;
+ return (kill (pid, 0) != -1);
+}
+
+#endif
+static void
+child_attach_to_process (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
- pid = atoi (args);
+ {
+ char *exec_file;
+ int pid;
+ char *dummy;
- if (pid == getpid()) /* Trying to masturbate? */
- error ("I refuse to debug myself!");
+ 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 (from_tty)
- {
- exec_file = (char *) get_exec_file (0);
+ if (pid == getpid ()) /* Trying to masturbate? */
+ error ("I refuse to debug myself!");
- if (exec_file)
- printf ("Attaching program `%s', pid %d\n", exec_file, pid);
- else
- printf ("Attaching pid %d\n", pid);
+ 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);
+ }
- fflush (stdout);
- }
+ if (!after_fork)
+ attach (pid);
+ else
+ REQUIRE_ATTACH (pid);
- attach (pid);
- inferior_pid = pid;
- push_target (&child_ops);
-#endif /* ATTACH_DETACH */
+ inferior_pid = pid;
+ push_target (&child_ops);
+ }
+#endif /* ATTACH_DETACH */
+}
+
+
+/* Attach to process PID, then initialize for debugging it. */
+
+static void
+child_attach (char *args, int from_tty)
+{
+ child_attach_to_process (args, from_tty, 0);
+}
+
+#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
+
+static void
+child_require_attach (char *args, int from_tty)
+{
+ child_attach_to_process (args, from_tty, 1);
+}
+
+static void
+child_detach_from_process (int pid, char *args, int from_tty, int after_fork)
+{
+#ifdef ATTACH_DETACH
+ {
+ 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.");
+#endif
+}
/* Take a program previously attached to and detaches it.
The program resumes execution and will no longer stop
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
- 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);
+ child_detach_from_process (inferior_pid, args, from_tty, 0);
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
+ unpush_target (&child_ops);
}
+static void
+child_require_detach (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
debugged. */
static void
-child_prepare_to_store ()
+child_prepare_to_store (void)
{
#ifdef CHILD_PREPARE_TO_STORE
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 process %d.\n",
- attach_flag? "attached": "child", inferior_pid);
+ 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;
+child_open (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 (void)
+{
+ /* "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 (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(). */
-#ifndef SHELL_FILE
-#define SHELL_FILE "/bin/sh"
-#endif
-
static void
-child_create_inferior (exec_file, allargs, env)
- char *exec_file;
- char *allargs;
- char **env;
-{
- int pid;
- char *shell_command;
- char *shell_file;
- static char default_shell_file[] = SHELL_FILE;
- int len;
- int pending_execs;
- /* Set debug_fork then attach to the child while it sleeps, to debug. */
- static int debug_fork = 0;
- /* This is set to the result of setpgrp, which if vforked, will be visible
- to you in the parent process. It's only used by humans for debugging. */
- static int debug_setpgrp = 657473;
- char **save_our_env;
-
- /* If no exec file handed to us, get it from the exec-file command -- with
- a good, common error message if none is specified. */
- if (exec_file == 0)
- exec_file = get_exec_file(1);
-
- /* The user might want tilde-expansion, and in general probably wants
- the program to behave the same way as if run from
- his/her favorite shell. So we let the shell run it for us.
- FIXME, this should probably search the local environment (as
- modified by the setenv command), not the env gdb inherited. */
- shell_file = getenv ("SHELL");
- if (shell_file == NULL)
- shell_file = default_shell_file;
-
- len = 5 + strlen (exec_file) + 1 + strlen (allargs) + 1 + /*slop*/ 10;
- /* If desired, concat something onto the front of ALLARGS.
- SHELL_COMMAND is the result. */
-#ifdef SHELL_COMMAND_CONCAT
- shell_command = (char *) alloca (strlen (SHELL_COMMAND_CONCAT) + len);
- strcpy (shell_command, SHELL_COMMAND_CONCAT);
+child_create_inferior (char *exec_file, char *allargs, char **env)
+{
+#ifdef HPUXHPPA
+ fork_inferior (exec_file, allargs, env, ptrace_me, ptrace_him, pre_fork_inferior, NULL);
#else
- shell_command = (char *) alloca (len);
- shell_command[0] = '\0';
+ fork_inferior (exec_file, allargs, env, ptrace_me, ptrace_him, NULL, NULL);
#endif
- strcat (shell_command, "exec ");
- strcat (shell_command, exec_file);
- strcat (shell_command, " ");
- strcat (shell_command, allargs);
+ /* We are at the first instruction we care about. */
+ /* Pedal to the metal... */
+ proceed ((CORE_ADDR) -1, TARGET_SIGNAL_0, 0);
+}
- /* exec is said to fail if the executable is open. */
- close_exec_file ();
+#if !defined(CHILD_POST_STARTUP_INFERIOR)
+void
+child_post_startup_inferior (int pid)
+{
+ /* This version of Unix doesn't require a meaningful "post startup inferior"
+ operation by a debugger.
+ */
+}
+#endif
- /* Retain a copy of our environment variables, since the child will
- replace the value of environ and if we're vforked, we have to
- restore it. */
- save_our_env = environ;
+#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
- /* Tell the terminal handling subsystem what tty we plan to run on;
- it will just record the information for later. */
- new_tty_prefork (inferior_io_terminal);
+void
+child_clone_and_follow_inferior (int child_pid, int *followed_child)
+{
+ clone_and_follow_inferior (child_pid, followed_child);
- /* It is generally good practice to flush any possible pending stdio
- output prior to doing a fork, to avoid the possibility of both the
- parent and child flushing the same data after the fork. */
+ /* Don't resume CHILD_PID; it's stopped where it ought to be, until
+ the decision gets made elsewhere how to continue it.
+ */
+}
- fflush (stdout);
- fflush (stderr);
-#if defined(USG) && !defined(HAVE_VFORK)
- pid = fork ();
-#else
- if (debug_fork)
- pid = fork ();
- else
- pid = vfork ();
+#if !defined(CHILD_POST_FOLLOW_INFERIOR_BY_CLONE)
+void
+child_post_follow_inferior_by_clone (void)
+{
+ /* This version of Unix doesn't require a meaningful "post follow inferior"
+ operation by a clone debugger.
+ */
+}
#endif
- if (pid < 0)
- perror_with_name ("vfork");
+#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 (pid == 0)
- {
- if (debug_fork)
- sleep (debug_fork);
+#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
-#ifdef TIOCGPGRP
- /* Run inferior in a separate process group. */
-#ifdef NEED_POSIX_SETPGID
- debug_setpgrp = setpgid (0, 0);
-#else
-#if defined(USG) && !defined(SETPGRP_ARGS)
- debug_setpgrp = setpgrp ();
-#else
- debug_setpgrp = setpgrp (getpid (), getpid ());
-#endif /* USG */
-#endif /* NEED_POSIX_SETPGID */
- if (debug_setpgrp == -1)
- perror("setpgrp failed in child");
-#endif /* TIOCGPGRP */
-
-#ifdef SET_STACK_LIMIT_HUGE
- /* Reset the stack limit back to what it was. */
- {
- struct rlimit rlim;
+#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
- getrlimit (RLIMIT_STACK, &rlim);
- rlim.rlim_cur = original_stack_limit;
- setrlimit (RLIMIT_STACK, &rlim);
- }
-#endif /* SET_STACK_LIMIT_HUGE */
+#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
- /* Ask the tty subsystem to switch to the one we specified earlier
- (or to share the current terminal, if none was specified). */
+#if !defined(CHILD_HAS_FORKED)
+int
+child_has_forked (int pid, int *child_pid)
+{
+ /* This version of Unix doesn't support notification of fork events. */
+ return 0;
+}
+#endif
- new_tty ();
- /* Changing the signal handlers for the inferior after
- a vfork can also change them for the superior, so we don't mess
- with signals here. See comments in
- initialize_signals for how we get the right signal handlers
- for the inferior. */
+#if !defined(CHILD_HAS_VFORKED)
+int
+child_has_vforked (int pid, int *child_pid)
+{
+ /* This version of Unix doesn't support notification of vfork events.
+ */
+ return 0;
+}
+#endif
-#ifdef USE_PROC_FS
- /* Use SVR4 /proc interface */
- proc_set_exec_trap ();
-#else
- /* "Trace me, Dr. Memory!" */
- call_ptrace (0, 0, (PTRACE_ARG3_TYPE) 0, 0);
-#endif
-
- /* There is no execlpe call, so we have to set the environment
- for our child in the global variable. If we've vforked, this
- clobbers the parent, but environ is restored a few lines down
- in the parent. By the way, yes we do need to look down the
- path to find $SHELL. Rich Pixley says so, and I agree. */
- environ = env;
- execlp (shell_file, shell_file, "-c", shell_command, (char *)0);
-
- fprintf (stderr, "Cannot exec %s: %s.\n", shell_file,
- safe_strerror (errno));
- fflush (stderr);
- _exit (0177);
- }
- /* Restore our environment in case a vforked child clob'd it. */
- environ = save_our_env;
+#if !defined(CHILD_CAN_FOLLOW_VFORK_PRIOR_TO_EXEC)
+int
+child_can_follow_vfork_prior_to_exec (void)
+{
+ /* 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
- /* Now that we have a child process, make it our target. */
- push_target (&child_ops);
-#ifdef CREATE_INFERIOR_HOOK
- CREATE_INFERIOR_HOOK (pid);
-#endif
+#if !defined(CHILD_POST_FOLLOW_VFORK)
+void
+child_post_follow_vfork (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
-/* The process was started by the fork that created it,
- but it will have stopped one instruction after execing the shell.
- Here we must get it up to actual execution of the real program. */
+#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
- inferior_pid = pid; /* Needed for wait_for_inferior stuff below */
+#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
- clear_proceed_status ();
+#if !defined(CHILD_HAS_EXECD)
+int
+child_has_execd (int pid, char **execd_pathname)
+{
+ /* This version of Unix doesn't support notification of exec events.
+ */
+ return 0;
+}
+#endif
- /* We will get a trace trap after one instruction.
- Continue it automatically. Eventually (after shell does an exec)
- it will get another trace trap. Then insert breakpoints and continue. */
-#ifdef START_INFERIOR_TRAPS_EXPECTED
- pending_execs = START_INFERIOR_TRAPS_EXPECTED;
-#else
- pending_execs = 2;
+#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
- init_wait_for_inferior ();
- /* Set up the "saved terminal modes" of the inferior
- based on what modes we are starting it with. */
- target_terminal_init ();
+#if !defined(CHILD_HAS_SYSCALL_EVENT)
+int
+child_has_syscall_event (int pid, enum target_waitkind *kind, int *syscall_id)
+{
+ /* This version of Unix doesn't support notification of syscall events.
+ */
+ return 0;
+}
+#endif
- /* Install inferior's terminal modes. */
- target_terminal_inferior ();
- while (1)
+#if !defined(CHILD_HAS_EXITED)
+int
+child_has_exited (int pid, int wait_status, int *exit_status)
+{
+ if (WIFEXITED (wait_status))
{
- stop_soon_quietly = 1; /* Make wait_for_inferior be quiet */
- wait_for_inferior ();
- if (stop_signal != SIGTRAP)
- {
- /* Let shell child handle its own signals in its own way */
- /* FIXME, what if child has exit()ed? Must exit loop somehow */
- resume (0, stop_signal);
- }
- else
- {
- /* We handle SIGTRAP, however; it means child did an exec. */
- if (0 == --pending_execs)
- break;
- resume (0, 0); /* Just make it go on */
- }
+ *exit_status = WEXITSTATUS (wait_status);
+ return 1;
}
- stop_soon_quietly = 0;
- /* We are now in the child process of interest, having exec'd the
- correct program, and are poised at the first instruction of the
- new program. */
-#ifdef SOLIB_CREATE_INFERIOR_HOOK
- SOLIB_CREATE_INFERIOR_HOOK (pid);
-#endif
+ if (WIFSIGNALED (wait_status))
+ {
+ *exit_status = 0; /* ?? Don't know what else to say here. */
+ return 1;
+ }
- /* Pedal to the metal. Away we go. */
- proceed ((CORE_ADDR) -1, 0, 0);
+ /* ?? 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);
generic_mourn_inferior ();
}
static int
-child_can_run ()
+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)
+{
+ 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 (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)
{
- return(1);
+ /* 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;
}
\f
-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 */
- 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 */
-};
+
+#if !defined(CHILD_PID_TO_STR)
+char *
+child_pid_to_str (int pid)
+{
+ return normal_pid_to_str (pid);
+}
+#endif
+
+static void
+init_child_ops (void)
+{
+ child_ops.to_shortname = "child";
+ child_ops.to_longname = "Unix child process";
+ child_ops.to_doc = "Unix child process (started by the \"run\" command).";
+ child_ops.to_open = child_open;
+ child_ops.to_attach = child_attach;
+ child_ops.to_post_attach = child_post_attach;
+ child_ops.to_require_attach = child_require_attach;
+ child_ops.to_detach = child_detach;
+ child_ops.to_require_detach = child_require_detach;
+ child_ops.to_resume = child_resume;
+ child_ops.to_wait = child_wait;
+ child_ops.to_post_wait = child_post_wait;
+ child_ops.to_fetch_registers = fetch_inferior_registers;
+ child_ops.to_store_registers = store_inferior_registers;
+ child_ops.to_prepare_to_store = child_prepare_to_store;
+ child_ops.to_xfer_memory = child_xfer_memory;
+ child_ops.to_files_info = child_files_info;
+ child_ops.to_insert_breakpoint = memory_insert_breakpoint;
+ child_ops.to_remove_breakpoint = memory_remove_breakpoint;
+ child_ops.to_terminal_init = terminal_init_inferior;
+ child_ops.to_terminal_inferior = terminal_inferior;
+ child_ops.to_terminal_ours_for_output = terminal_ours_for_output;
+ child_ops.to_terminal_ours = terminal_ours;
+ child_ops.to_terminal_info = child_terminal_info;
+ child_ops.to_kill = kill_inferior;
+ child_ops.to_create_inferior = child_create_inferior;
+ child_ops.to_post_startup_inferior = child_post_startup_inferior;
+ child_ops.to_acknowledge_created_inferior = child_acknowledge_created_inferior;
+ child_ops.to_clone_and_follow_inferior = child_clone_and_follow_inferior;
+ child_ops.to_post_follow_inferior_by_clone = child_post_follow_inferior_by_clone;
+ child_ops.to_insert_fork_catchpoint = child_insert_fork_catchpoint;
+ child_ops.to_remove_fork_catchpoint = child_remove_fork_catchpoint;
+ child_ops.to_insert_vfork_catchpoint = child_insert_vfork_catchpoint;
+ child_ops.to_remove_vfork_catchpoint = child_remove_vfork_catchpoint;
+ child_ops.to_has_forked = child_has_forked;
+ child_ops.to_has_vforked = child_has_vforked;
+ child_ops.to_can_follow_vfork_prior_to_exec = child_can_follow_vfork_prior_to_exec;
+ child_ops.to_post_follow_vfork = child_post_follow_vfork;
+ child_ops.to_insert_exec_catchpoint = child_insert_exec_catchpoint;
+ child_ops.to_remove_exec_catchpoint = child_remove_exec_catchpoint;
+ child_ops.to_has_execd = child_has_execd;
+ child_ops.to_reported_exec_events_per_exec_call = child_reported_exec_events_per_exec_call;
+ child_ops.to_has_syscall_event = child_has_syscall_event;
+ child_ops.to_has_exited = child_has_exited;
+ child_ops.to_mourn_inferior = child_mourn_inferior;
+ child_ops.to_can_run = child_can_run;
+ child_ops.to_thread_alive = child_thread_alive;
+ child_ops.to_pid_to_str = child_pid_to_str;
+ child_ops.to_stop = child_stop;
+ child_ops.to_enable_exception_callback = child_enable_exception_callback;
+ child_ops.to_get_current_exception_event = child_get_current_exception_event;
+ child_ops.to_pid_to_exec_file = child_pid_to_exec_file;
+ child_ops.to_core_file_to_sym_file = child_core_file_to_sym_file;
+ child_ops.to_stratum = process_stratum;
+ child_ops.to_has_all_memory = 1;
+ child_ops.to_has_memory = 1;
+ child_ops.to_has_stack = 1;
+ child_ops.to_has_registers = 1;
+ child_ops.to_has_execution = 1;
+ child_ops.to_magic = OPS_MAGIC;
+}
void
-_initialize_inftarg ()
+_initialize_inftarg (void)
{
+#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
+
+ init_child_ops ();
add_target (&child_ops);
}
projects / deliverable / binutils-gdb.git / blobdiff