/* Target-vector operations for controlling Unix child processes, for GDB.
- Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1998, 1999,
- 2000, 2002
- Free Software Foundation, Inc.
+
+ Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1998, 1999,
+ 2000, 2002, 2003 Free Software Foundation, Inc.
+
Contributed by Cygnus Support.
## Contains temporary hacks..
#include <fcntl.h>
#include "gdb_wait.h"
+#include "inflow.h"
extern struct symtab_and_line *child_enable_exception_callback (enum
exception_event_kind,
static void child_detach (char *, int);
-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);
#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 OURSTATUS. */
ourstatus->kind = TARGET_WAITKIND_SPURIOUS;
return pid_to_ptid (pid);
}
-
- if (target_has_forked (pid, &related_pid)
- && ((pid == PIDGET (inferior_ptid))
- || (related_pid == PIDGET (inferior_ptid))))
- {
- ourstatus->kind = TARGET_WAITKIND_FORKED;
- ourstatus->value.related_pid = related_pid;
- return pid_to_ptid (pid);
- }
-
- if (target_has_vforked (pid, &related_pid)
- && ((pid == PIDGET (inferior_ptid))
- || (related_pid == PIDGET (inferior_ptid))))
- {
- ourstatus->kind = TARGET_WAITKIND_VFORKED;
- ourstatus->value.related_pid = related_pid;
- return pid_to_ptid (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_to_ptid (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_to_ptid (pid);
- }
-
- /*## } while (pid != PIDGET (inferior_ptid)); ## *//* Some other child died or stopped */
-/* hack for thread testing */
- }
- while ((pid != PIDGET (inferior_ptid)) && not_same_real_pid);
-/*## */
+ } while (pid != PIDGET (inferior_ptid)); /* Some other child died or stopped */
store_waitstatus (ourstatus, status);
return pid_to_ptid (pid);
#endif
+/* Attach to process PID, then initialize for debugging it. */
+
static void
-child_attach_to_process (char *args, int from_tty, int after_fork)
+child_attach (char *args, int from_tty)
{
if (!args)
error_no_arg ("process-id to attach");
{
exec_file = (char *) get_exec_file (0);
- if (after_fork)
- printf_unfiltered ("Attaching after fork to %s\n",
- target_pid_to_str (pid_to_ptid (pid)));
- else if (exec_file)
+ if (exec_file)
printf_unfiltered ("Attaching to program: %s, %s\n", exec_file,
target_pid_to_str (pid_to_ptid (pid)));
else
gdb_flush (gdb_stdout);
}
- if (!after_fork)
- attach (pid);
- else
- REQUIRE_ATTACH (pid);
+ attach (pid);
inferior_ptid = pid_to_ptid (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)
}
#endif
-static void
-child_require_attach (char *args, int from_tty)
-{
- child_attach_to_process (args, from_tty, 1);
-}
+/* 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_from_process (int pid, char *args, int from_tty, int after_fork)
+child_detach (char *args, int from_tty)
{
#ifdef ATTACH_DETACH
{
int siggnal = 0;
+ int pid = PIDGET (inferior_ptid);
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_to_ptid (pid)));
- else
- printf_unfiltered ("Detaching from program: %s, %s\n", exec_file,
- target_pid_to_str (pid_to_ptid (pid)));
+ 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);
- if (!after_fork)
- detach (siggnal);
- else
- REQUIRE_DETACH (pid, siggnal);
+ detach (siggnal);
+
+ inferior_ptid = null_ptid;
+ unpush_target (&child_ops);
}
#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
- 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 (char *args, int from_tty)
-{
- child_detach_from_process (PIDGET (inferior_ptid), args, from_tty, 0);
- inferior_ptid = null_ptid;
- 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
#endif
-void
-child_clone_and_follow_inferior (int child_pid, int *followed_child)
-{
- 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.
- */
-}
-
-
-#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 !defined(CHILD_INSERT_FORK_CATCHPOINT)
int
child_insert_fork_catchpoint (int pid)
}
#endif
-#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
-
-
-#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
-
-
-#if !defined(CHILD_CAN_FOLLOW_VFORK_PRIOR_TO_EXEC)
+#if !defined(CHILD_FOLLOW_FORK)
int
-child_can_follow_vfork_prior_to_exec (void)
+child_follow_fork (int follow_child)
{
- /* 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.
- */
+ /* This version of Unix doesn't support following fork or vfork events. */
return 0;
}
#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
-
#if !defined(CHILD_INSERT_EXEC_CATCHPOINT)
int
child_insert_exec_catchpoint (int pid)
}
#endif
-#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
-
-
#if !defined(CHILD_REPORTED_EXEC_EVENTS_PER_EXEC_CALL)
int
child_reported_exec_events_per_exec_call (void)
}
#endif
-
-#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
-
-
#if !defined(CHILD_HAS_EXITED)
int
child_has_exited (int pid, int wait_status, int *exit_status)
static void
child_stop (void)
{
- extern pid_t inferior_process_group;
-
kill (-inferior_process_group, SIGINT);
}
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_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_follow_fork = child_follow_fork;
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;
#define PROC_NAME_FMT "/proc/%05d"
#endif
sprintf (procname, PROC_NAME_FMT, getpid ());
- if ((fd = open (procname, O_RDONLY)) >= 0)
+ fd = open (procname, O_RDONLY);
+ if (fd >= 0)
{
close (fd);
return;
projects / deliverable / binutils-gdb.git / blobdiff