#include <fcntl.h>
#include <errno.h>
#include <string.h>
+#include <stropts.h>
+#include <poll.h>
#include "inferior.h"
#include "target.h"
the inferior's procinfo information. */
struct procinfo {
- int valid; /* Nonzero if pid, fd, & pathname are valid */
+ struct procinfo *next;
int pid; /* Process ID of inferior */
int fd; /* File descriptor for /proc entry */
char *pathname; /* Pathname to /proc entry */
+ int had_event; /* poll/select says something happened */
int was_stopped; /* Nonzero if was stopped prior to attach */
int nopass_next_sigstop; /* Don't pass a sigstop on next resume */
prrun_t prrun; /* Control state when it is run */
sysset_t saved_entryset; /* Saved traced system call entry set */
};
-static struct procinfo pi; /* Inferior's process information */
+/* List of inferior process information */
+static struct procinfo *procinfo_list = NULL;
+
+static struct pollfd *poll_list; /* pollfds used for waiting on /proc */
+
+static int num_poll_list = 0; /* Number of entries in poll_list */
+
+static int last_resume_pid = -1; /* Last pid used with procfs_resume */
/* Much of the information used in the /proc interface, particularly for
printing status information, is kept as tables of structures of the
errnoname PARAMS ((int));
static int
-proc_address_to_fd PARAMS ((CORE_ADDR, int));
+proc_address_to_fd PARAMS ((struct procinfo *, CORE_ADDR, int));
static int
open_proc_file PARAMS ((int, struct procinfo *, int));
close_proc_file PARAMS ((struct procinfo *));
static void
-unconditionally_kill_inferior PARAMS ((void));
+unconditionally_kill_inferior PARAMS ((struct procinfo *));
-static void
-proc_init_failed PARAMS ((char *));
+static NORETURN void
+proc_init_failed PARAMS ((struct procinfo *, char *));
static void
info_proc PARAMS ((char *, int));
procfs_create_inferior PARAMS ((char *, char *, char **));
static void
-procfs_notice_signals PARAMS ((void));
+procfs_notice_signals PARAMS ((int pid));
+
+static struct procinfo *
+find_procinfo PARAMS ((pid_t pid, int okfail));
/* External function prototypes that can't be easily included in any
header file because the args are typedefs in system include files. */
/*
+LOCAL FUNCTION
+
+ find_procinfo -- convert a process id to a struct procinfo
+
+SYNOPSIS
+
+ static struct procinfo * find_procinfo (pid_t pid, int okfail);
+
+DESCRIPTION
+
+ Given a process id, look it up in the procinfo chain. Returns
+ a struct procinfo *. If can't find pid, then call error(),
+ unless okfail is set, in which case, return NULL;
+ */
+
+static struct procinfo *
+find_procinfo (pid, okfail)
+ pid_t pid;
+ int okfail;
+{
+ struct procinfo *procinfo;
+
+ for (procinfo = procinfo_list; procinfo; procinfo = procinfo->next)
+ if (procinfo->pid == pid)
+ return procinfo;
+
+ if (okfail)
+ return NULL;
+
+ error ("procfs (find_procinfo): Couldn't locate pid %d", pid);
+}
+
+/*
+
+LOCAL MACRO
+
+ current_procinfo -- convert inferior_pid to a struct procinfo
+
+SYNOPSIS
+
+ static struct procinfo * current_procinfo;
+
+DESCRIPTION
+
+ Looks up inferior_pid in the procinfo chain. Always returns a
+ struct procinfo *. If process can't be found, we error() out.
+ */
+
+#define current_procinfo find_procinfo (inferior_pid, 0)
+
+/*
+
+LOCAL FUNCTION
+
+ add_fd -- Add the fd to the poll/select list
+
+SYNOPSIS
+
+ static void add_fd (struct procinfo *);
+
+DESCRIPTION
+
+ Add the fd of the supplied procinfo to the list of fds used for
+ poll/select operations.
+ */
+
+static void
+add_fd (pi)
+ struct procinfo *pi;
+{
+ if (num_poll_list <= 0)
+ poll_list = (struct pollfd *) xmalloc (sizeof (struct pollfd));
+ else
+ poll_list = (struct pollfd *) xrealloc (poll_list,
+ (num_poll_list + 1)
+ * sizeof (struct pollfd));
+ poll_list[num_poll_list].fd = pi->fd;
+ poll_list[num_poll_list].events = POLLPRI;
+
+ num_poll_list++;
+}
+
+static void
+remove_fd (pi)
+ struct procinfo *pi;
+{
+ int i;
+
+ for (i = 0; i < num_poll_list; i++)
+ {
+ if (poll_list[i].fd == pi->fd)
+ {
+ if (i != num_poll_list - 1)
+ memcpy (poll_list, poll_list + i + 1,
+ (num_poll_list - i - 1) * sizeof (struct pollfd));
+
+ num_poll_list--;
+
+ if (num_poll_list == 0)
+ free (poll_list);
+ else
+ poll_list = (struct pollfd *) xrealloc (poll_list,
+ num_poll_list
+ * sizeof (struct pollfd));
+ return;
+ }
+ }
+}
+
+#define LOSING_POLL unixware_sux
+
+static struct procinfo *
+wait_fd ()
+{
+ struct procinfo *pi;
+ int num_fds;
+ int i;
+
+ if (attach_flag)
+ set_sigint_trap (); /* Causes SIGINT to be passed on to the
+ attached process. */
+
+#ifndef LOSING_POLL
+ num_fds = poll (poll_list, num_poll_list, -1);
+#else
+ pi = current_procinfo;
+
+ if (ioctl (pi->fd, PIOCWSTOP, &pi->prstatus) < 0)
+ {
+ print_sys_errmsg (pi->pathname, errno);
+ error ("PIOCWSTOP failed");
+ }
+ pi->had_event = 1;
+#endif
+
+ if (attach_flag)
+ clear_sigint_trap();
+
+#ifndef LOSING_POLL
+
+ if (num_fds <= 0)
+ {
+ print_sys_errmsg ("poll failed\n", errno);
+ error ("Poll failed, returned %d", num_fds);
+ }
+
+ for (i = 0; i < num_poll_list && num_fds > 0; i++)
+ {
+ if ((poll_list[i].revents & (POLLPRI|POLLERR|POLLHUP|POLLNVAL)) == 0)
+ continue;
+ for (pi = procinfo_list; pi; pi = pi->next)
+ {
+ if (poll_list[i].fd == pi->fd)
+ {
+ if (ioctl (pi->fd, PIOCSTATUS, &pi->prstatus) < 0)
+ {
+ print_sys_errmsg (pi->pathname, errno);
+ error ("PIOCSTATUS failed");
+ }
+ num_fds--;
+ pi->had_event = 1;
+ break;
+ }
+ }
+ if (!pi)
+ error ("procfs_wait: Couldn't find procinfo for fd %d\n",
+ poll_list[i].fd);
+ }
+#endif /* LOSING_POLL */
+
+ return pi;
+}
+
+/*
+
LOCAL FUNCTION
lookupdesc -- translate a value to a summary desc string
#if defined (SYS_seteuid)
syscall_table[SYS_seteuid] = "seteuid";
#endif
+#if defined (SYS_sproc)
+ syscall_table[SYS_sproc] = "sproc";
+#endif
}
/*
static void
procfs_kill_inferior ()
{
- if (inferior_pid != 0)
- {
- unconditionally_kill_inferior ();
- target_mourn_inferior ();
- }
+ target_mourn_inferior ();
}
/*
SYNOPSIS
- static void unconditionally_kill_inferior (void)
+ static void unconditionally_kill_inferior (struct procinfo *)
DESCRIPTION
- Kill the current inferior. Should not be called until it
- is at least tested that there is an inferior.
+ Kill the specified inferior.
NOTE
A possibly useful enhancement would be to first try sending
the inferior a terminate signal, politely asking it to commit
- suicide, before we murder it.
+ suicide, before we murder it (we could call that
+ politely_kill_inferior()).
*/
static void
-unconditionally_kill_inferior ()
+unconditionally_kill_inferior (pi)
+ struct procinfo *pi;
{
int signo;
+ int ppid;
+ ppid = pi->prstatus.pr_ppid;
+
signo = SIGKILL;
- ioctl (pi.fd, PIOCKILL, &signo);
- close_proc_file (&pi);
- wait ((int *) 0);
+ ioctl (pi->fd, PIOCKILL, &signo);
+ close_proc_file (pi);
+
+/* Only wait() for our direct children. Our grandchildren zombies are killed
+ by the death of their parents. */
+
+ if (ppid == getpid())
+ wait ((int *) 0);
}
/*
struct target_ops *target; /* ignored */
{
int nbytes = 0;
+ struct procinfo *pi;
+
+ pi = current_procinfo;
- if (lseek (pi.fd, (off_t) memaddr, 0) == (off_t) memaddr)
+ if (lseek(pi->fd, (off_t) memaddr, 0) == (off_t) memaddr)
{
if (dowrite)
{
- nbytes = write (pi.fd, myaddr, len);
+ nbytes = write (pi->fd, myaddr, len);
}
else
{
- nbytes = read (pi.fd, myaddr, len);
+ nbytes = read (pi->fd, myaddr, len);
}
if (nbytes < 0)
{
procfs_store_registers (regno)
int regno;
{
+ struct procinfo *pi;
+
+ pi = current_procinfo;
+
if (regno != -1)
{
- ioctl (pi.fd, PIOCGREG, &pi.gregset);
+ ioctl (pi->fd, PIOCGREG, &pi->gregset);
}
- fill_gregset (&pi.gregset, regno);
- ioctl (pi.fd, PIOCSREG, &pi.gregset);
+ fill_gregset (&pi->gregset, regno);
+ ioctl (pi->fd, PIOCSREG, &pi->gregset);
#if defined (FP0_REGNUM)
if (regno != -1)
{
- ioctl (pi.fd, PIOCGFPREG, &pi.fpregset);
+ ioctl (pi->fd, PIOCGFPREG, &pi->fpregset);
}
- fill_fpregset (&pi.fpregset, regno);
- ioctl (pi.fd, PIOCSFPREG, &pi.fpregset);
+ fill_fpregset (&pi->fpregset, regno);
+ ioctl (pi->fd, PIOCSFPREG, &pi->fpregset);
#endif /* FP0_REGNUM */
LOCAL FUNCTION
- procfs_init_inferior - initialize access to a /proc entry
+ create_procinfo - initialize access to a /proc entry
+
+SYNOPSIS
+
+ void create_procinfo (int pid)
+
+DESCRIPTION
+
+ Allocate a procinfo structure, open the /proc file and then sets up
+ the set of signals and faults that are to be traced.
+
+NOTES
+
+ If proc_init_failed ever gets called, control returns to the command
+ processing loop via the standard error handling code.
+
+ */
+
+static void
+create_procinfo (pid)
+ int pid;
+{
+ struct procinfo *pi;
+
+ if (find_procinfo (pid, 1))
+ return; /* All done! It already exists */
+
+ pi = (struct procinfo *) xmalloc (sizeof (struct procinfo));
+
+ if (!open_proc_file (pid, pi, O_RDWR))
+ proc_init_failed (pi, "can't open process file");
+
+ /* Add new process to process info list */
+
+ pi->next = procinfo_list;
+ procinfo_list = pi;
+
+ add_fd (pi); /* Add to list for poll/select */
+
+ memset ((char *) &pi->prrun, 0, sizeof (pi->prrun));
+ prfillset (&pi->prrun.pr_trace);
+ procfs_notice_signals (pid);
+ prfillset (&pi->prrun.pr_fault);
+ prdelset (&pi->prrun.pr_fault, FLTPAGE);
+
+ if (ioctl (pi->fd, PIOCWSTOP, &pi->prstatus) < 0)
+ proc_init_failed (pi, "PIOCWSTOP failed");
+
+ if (ioctl (pi->fd, PIOCSFAULT, &pi->prrun.pr_fault) < 0)
+ proc_init_failed (pi, "PIOCSFAULT failed");
+}
+
+/*
+
+LOCAL FUNCTION
+
+ procfs_init_inferior - initialize target vector and access to a
+ /proc entry
SYNOPSIS
procfs_init_inferior (pid)
int pid;
{
-
push_target (&procfs_ops);
- if (!open_proc_file (pid, &pi, O_RDWR))
- {
- proc_init_failed ("can't open process file");
- }
- else
- {
- memset ((char *) &pi.prrun, 0, sizeof (pi.prrun));
- prfillset (&pi.prrun.pr_trace);
- procfs_notice_signals ();
- prfillset (&pi.prrun.pr_fault);
- prdelset (&pi.prrun.pr_fault, FLTPAGE);
- if (ioctl (pi.fd, PIOCWSTOP, &pi.prstatus) < 0)
- {
- proc_init_failed ("PIOCWSTOP failed");
- }
- else if (ioctl (pi.fd, PIOCSFAULT, &pi.prrun.pr_fault) < 0)
- {
- proc_init_failed ("PIOCSFAULT failed");
- }
- }
+ create_procinfo (pid);
+ add_thread (pid); /* Setup initial thread */
+
+ /* One trap to exec the shell, one to exec the program being debugged. */
+ startup_inferior (2);
}
/*
SYNOPSIS
- static void procfs_notice_signals (void);
+ static void procfs_notice_signals (int pid);
DESCRIPTION
*/
static void
-procfs_notice_signals ()
+procfs_notice_signals (pid)
+ int pid;
{
int signo;
+ struct procinfo *pi;
- if (pi.valid)
+ pi = find_procinfo (pid, 0);
+
+ for (signo = 0; signo < NSIG; signo++)
{
- for (signo = 0; signo < NSIG; signo++)
+ if (signal_stop_state (target_signal_from_host (signo)) == 0 &&
+ signal_print_state (target_signal_from_host (signo)) == 0 &&
+ signal_pass_state (target_signal_from_host (signo)) == 1)
{
- if (signal_stop_state (signo) == 0 &&
- signal_print_state (signo) == 0 &&
- signal_pass_state (signo) == 1)
- {
- prdelset (&pi.prrun.pr_trace, signo);
- }
- else
- {
- praddset (&pi.prrun.pr_trace, signo);
- }
+ prdelset (&pi->prrun.pr_trace, signo);
}
- if (ioctl (pi.fd, PIOCSTRACE, &pi.prrun.pr_trace))
+ else
{
- print_sys_errmsg ("PIOCSTRACE failed", errno);
+ praddset (&pi->prrun.pr_trace, signo);
}
}
+ if (ioctl (pi->fd, PIOCSTRACE, &pi->prrun.pr_trace))
+ {
+ print_sys_errmsg ("PIOCSTRACE failed", errno);
+ }
}
/*
proc_set_exec_trap ()
{
sysset_t exitset;
+ sysset_t entryset;
auto char procname[32];
int fd;
if ((fd = open (procname, O_RDWR)) < 0)
{
perror (procname);
- fflush (stderr);
+ gdb_flush (gdb_stderr);
_exit (127);
}
premptyset (&exitset);
+ premptyset (&entryset);
/* GW: Rationale...
Not all systems with /proc have all the exec* syscalls with the same
praddset (&exitset, SYS_execve);
#endif
#ifdef SYS_execv
- praddset(&exitset, SYS_execv);
+ praddset (&exitset, SYS_execv);
#endif
if (ioctl (fd, PIOCSEXIT, &exitset) < 0)
{
perror (procname);
- fflush (stderr);
+ gdb_flush (gdb_stderr);
_exit (127);
}
+ praddset (&entryset, SYS_exit);
+
+ if (ioctl (fd, PIOCSENTRY, &entryset) < 0)
+ {
+ perror (procname);
+ gdb_flush (gdb_stderr);
+ _exit (126);
+ }
+
/* Turn off inherit-on-fork flag so that all grand-children of gdb
start with tracing flags cleared. */
int funcstat = 0;
struct prmap *prmaps;
struct prmap *prmap;
+ struct procinfo *pi;
- if (pi.valid && (ioctl (pi.fd, PIOCNMAP, &nmap) == 0))
+ pi = current_procinfo;
+
+ if (ioctl (pi->fd, PIOCNMAP, &nmap) == 0)
{
prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps));
- if (ioctl (pi.fd, PIOCMAP, prmaps) == 0)
+ if (ioctl (pi->fd, PIOCMAP, prmaps) == 0)
{
for (prmap = prmaps; prmap -> pr_size && funcstat == 0; ++prmap)
{
- fd = proc_address_to_fd ((CORE_ADDR) prmap -> pr_vaddr, 0);
+ fd = proc_address_to_fd (pi, (CORE_ADDR) prmap -> pr_vaddr, 0);
funcstat = (*func) (fd, (CORE_ADDR) prmap -> pr_vaddr);
close (fd);
}
struct prmap *prmaps;
struct prmap *prmap;
CORE_ADDR baseaddr = 0;
+ struct procinfo *pi;
+
+ pi = current_procinfo;
- if (pi.valid && (ioctl (pi.fd, PIOCNMAP, &nmap) == 0))
+ if (ioctl (pi->fd, PIOCNMAP, &nmap) == 0)
{
prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps));
- if (ioctl (pi.fd, PIOCMAP, prmaps) == 0)
+ if (ioctl (pi->fd, PIOCMAP, prmaps) == 0)
{
for (prmap = prmaps; prmap -> pr_size; ++prmap)
{
SYNOPSIS
- int proc_address_to_fd (CORE_ADDR addr, complain)
+ int proc_address_to_fd (struct procinfo *pi, CORE_ADDR addr, complain)
DESCRIPTION
*/
static int
-proc_address_to_fd (addr, complain)
+proc_address_to_fd (pi, addr, complain)
+ struct procinfo *pi;
CORE_ADDR addr;
int complain;
{
int fd = -1;
- if (pi.valid)
+ if ((fd = ioctl (pi->fd, PIOCOPENM, (caddr_t *) &addr)) < 0)
{
- if ((fd = ioctl (pi.fd, PIOCOPENM, (caddr_t *) &addr)) < 0)
+ if (complain)
{
- if (complain)
- {
- print_sys_errmsg (pi.pathname, errno);
- warning ("can't find mapped file for address 0x%x", addr);
- }
+ print_sys_errmsg (pi->pathname, errno);
+ warning ("can't find mapped file for address 0x%x", addr);
}
}
return (fd);
exec_file = (char *) get_exec_file (0);
if (exec_file)
- printf ("Attaching program `%s', pid %d\n", exec_file, pid);
+ printf_unfiltered ("Attaching to program `%s', %s\n", exec_file, target_pid_to_str (pid));
else
- printf ("Attaching pid %d\n", pid);
+ printf_unfiltered ("Attaching to %s\n", target_pid_to_str (pid));
- fflush (stdout);
+ gdb_flush (gdb_stdout);
}
do_attach (pid);
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);
+ printf_unfiltered ("Detaching from program: %s %s\n",
+ exec_file, target_pid_to_str (inferior_pid));
+ gdb_flush (gdb_stdout);
}
if (args)
siggnal = atoi (args);
procfs_files_info (ignore)
struct target_ops *ignore;
{
- printf ("\tUsing the running image of %s process %d via /proc.\n",
- attach_flag? "attached": "child", inferior_pid);
+ printf_unfiltered ("\tUsing the running image of %s %s via /proc.\n",
+ attach_flag? "attached": "child", target_pid_to_str (inferior_pid));
}
/* ARGSUSED */
int pid;
{
int result;
+ struct procinfo *pi;
+
+ pi = (struct procinfo *) xmalloc (sizeof (struct procinfo));
- if (!open_proc_file (pid, &pi, O_RDWR))
+ if (!open_proc_file (pid, pi, O_RDWR))
{
- perror_with_name (pi.pathname);
+ free (pi);
+ perror_with_name (pi->pathname);
/* NOTREACHED */
}
+ /* Add new process to process info list */
+
+ pi->next = procinfo_list;
+ procinfo_list = pi;
+
+ add_fd (pi); /* Add to list for poll/select */
+
/* Get current status of process and if it is not already stopped,
then stop it. Remember whether or not it was stopped when we first
examined it. */
- if (ioctl (pi.fd, PIOCSTATUS, &pi.prstatus) < 0)
+ if (ioctl (pi->fd, PIOCSTATUS, &pi->prstatus) < 0)
{
- print_sys_errmsg (pi.pathname, errno);
- close_proc_file (&pi);
+ print_sys_errmsg (pi->pathname, errno);
+ close_proc_file (pi);
error ("PIOCSTATUS failed");
}
- if (pi.prstatus.pr_flags & (PR_STOPPED | PR_ISTOP))
+ if (pi->prstatus.pr_flags & (PR_STOPPED | PR_ISTOP))
{
- pi.was_stopped = 1;
+ pi->was_stopped = 1;
}
else
{
- pi.was_stopped = 0;
+ pi->was_stopped = 0;
if (1 || query ("Process is currently running, stop it? "))
{
/* Make it run again when we close it. */
{
long pr_flags;
pr_flags = PR_RLC;
- result = ioctl (pi.fd, PIOCSET, &pr_flags);
+ result = ioctl (pi->fd, PIOCSET, &pr_flags);
}
#else
#if defined (PIOCSRLC) /* Original method */
- result = ioctl (pi.fd, PIOCSRLC, 0);
+ result = ioctl (pi->fd, PIOCSRLC, 0);
#endif
#endif
if (result < 0)
{
- print_sys_errmsg (pi.pathname, errno);
- close_proc_file (&pi);
+ print_sys_errmsg (pi->pathname, errno);
+ close_proc_file (pi);
error ("PIOCSRLC or PIOCSET failed");
}
- if (ioctl (pi.fd, PIOCSTOP, &pi.prstatus) < 0)
+ if (ioctl (pi->fd, PIOCSTOP, &pi->prstatus) < 0)
{
- print_sys_errmsg (pi.pathname, errno);
- close_proc_file (&pi);
+ print_sys_errmsg (pi->pathname, errno);
+ close_proc_file (pi);
error ("PIOCSTOP failed");
}
- pi.nopass_next_sigstop = 1;
+ pi->nopass_next_sigstop = 1;
}
else
{
- printf ("Ok, gdb will wait for process %u to stop.\n", pid);
+ printf_unfiltered ("Ok, gdb will wait for %s to stop.\n", target_pid_to_str (pid));
}
}
/* Remember some things about the inferior that we will, or might, change
so that we can restore them when we detach. */
- ioctl (pi.fd, PIOCGTRACE, &pi.saved_trace);
- ioctl (pi.fd, PIOCGHOLD, &pi.saved_sighold);
- ioctl (pi.fd, PIOCGFAULT, &pi.saved_fltset);
- ioctl (pi.fd, PIOCGENTRY, &pi.saved_entryset);
- ioctl (pi.fd, PIOCGEXIT, &pi.saved_exitset);
+ ioctl (pi->fd, PIOCGTRACE, &pi->saved_trace);
+ ioctl (pi->fd, PIOCGHOLD, &pi->saved_sighold);
+ ioctl (pi->fd, PIOCGFAULT, &pi->saved_fltset);
+ ioctl (pi->fd, PIOCGENTRY, &pi->saved_entryset);
+ ioctl (pi->fd, PIOCGEXIT, &pi->saved_exitset);
/* Set up trace and fault sets, as gdb expects them. */
- memset (&pi.prrun, 0, sizeof (pi.prrun));
- prfillset (&pi.prrun.pr_trace);
- procfs_notice_signals ();
- prfillset (&pi.prrun.pr_fault);
- prdelset (&pi.prrun.pr_fault, FLTPAGE);
- if (ioctl (pi.fd, PIOCSFAULT, &pi.prrun.pr_fault))
+ memset (&pi->prrun, 0, sizeof (pi->prrun));
+ prfillset (&pi->prrun.pr_trace);
+ procfs_notice_signals (pid);
+ prfillset (&pi->prrun.pr_fault);
+ prdelset (&pi->prrun.pr_fault, FLTPAGE);
+ if (ioctl (pi->fd, PIOCSFAULT, &pi->prrun.pr_fault))
{
print_sys_errmsg ("PIOCSFAULT failed", errno);
}
- if (ioctl (pi.fd, PIOCSTRACE, &pi.prrun.pr_trace))
+ if (ioctl (pi->fd, PIOCSTRACE, &pi->prrun.pr_trace))
{
print_sys_errmsg ("PIOCSTRACE failed", errno);
}
int signal;
{
int result;
+ struct procinfo *pi;
+
+ pi = current_procinfo;
if (signal)
{
- set_proc_siginfo (&pi, signal);
+ set_proc_siginfo (pi, signal);
}
- if (ioctl (pi.fd, PIOCSEXIT, &pi.saved_exitset) < 0)
+ if (ioctl (pi->fd, PIOCSEXIT, &pi->saved_exitset) < 0)
{
- print_sys_errmsg (pi.pathname, errno);
- printf ("PIOCSEXIT failed.\n");
+ print_sys_errmsg (pi->pathname, errno);
+ printf_unfiltered ("PIOCSEXIT failed.\n");
}
- if (ioctl (pi.fd, PIOCSENTRY, &pi.saved_entryset) < 0)
+ if (ioctl (pi->fd, PIOCSENTRY, &pi->saved_entryset) < 0)
{
- print_sys_errmsg (pi.pathname, errno);
- printf ("PIOCSENTRY failed.\n");
+ print_sys_errmsg (pi->pathname, errno);
+ printf_unfiltered ("PIOCSENTRY failed.\n");
}
- if (ioctl (pi.fd, PIOCSTRACE, &pi.saved_trace) < 0)
+ if (ioctl (pi->fd, PIOCSTRACE, &pi->saved_trace) < 0)
{
- print_sys_errmsg (pi.pathname, errno);
- printf ("PIOCSTRACE failed.\n");
+ print_sys_errmsg (pi->pathname, errno);
+ printf_unfiltered ("PIOCSTRACE failed.\n");
}
- if (ioctl (pi.fd, PIOCSHOLD, &pi.saved_sighold) < 0)
+ if (ioctl (pi->fd, PIOCSHOLD, &pi->saved_sighold) < 0)
{
- print_sys_errmsg (pi.pathname, errno);
- printf ("PIOSCHOLD failed.\n");
+ print_sys_errmsg (pi->pathname, errno);
+ printf_unfiltered ("PIOSCHOLD failed.\n");
}
- if (ioctl (pi.fd, PIOCSFAULT, &pi.saved_fltset) < 0)
+ if (ioctl (pi->fd, PIOCSFAULT, &pi->saved_fltset) < 0)
{
- print_sys_errmsg (pi.pathname, errno);
- printf ("PIOCSFAULT failed.\n");
+ print_sys_errmsg (pi->pathname, errno);
+ printf_unfiltered ("PIOCSFAULT failed.\n");
}
- if (ioctl (pi.fd, PIOCSTATUS, &pi.prstatus) < 0)
+ if (ioctl (pi->fd, PIOCSTATUS, &pi->prstatus) < 0)
{
- print_sys_errmsg (pi.pathname, errno);
- printf ("PIOCSTATUS failed.\n");
+ print_sys_errmsg (pi->pathname, errno);
+ printf_unfiltered ("PIOCSTATUS failed.\n");
}
else
{
- if (signal || (pi.prstatus.pr_flags & (PR_STOPPED | PR_ISTOP)))
+ if (signal || (pi->prstatus.pr_flags & (PR_STOPPED | PR_ISTOP)))
{
- if (signal || !pi.was_stopped ||
+ if (signal || !pi->was_stopped ||
query ("Was stopped when attached, make it runnable again? "))
{
/* Clear any fault that might have stopped it. */
- if (ioctl (pi.fd, PIOCCFAULT, 0))
+ if (ioctl (pi->fd, PIOCCFAULT, 0))
{
- print_sys_errmsg (pi.pathname, errno);
- printf ("PIOCCFAULT failed.\n");
+ print_sys_errmsg (pi->pathname, errno);
+ printf_unfiltered ("PIOCCFAULT failed.\n");
}
/* Make it run again when we close it. */
{
long pr_flags;
pr_flags = PR_RLC;
- result = ioctl (pi.fd, PIOCSET, &pr_flags);
+ result = ioctl (pi->fd, PIOCSET, &pr_flags);
}
#else
#if defined (PIOCSRLC) /* Original method */
- result = ioctl (pi.fd, PIOCSRLC, 0);
+ result = ioctl (pi->fd, PIOCSRLC, 0);
#endif
#endif
if (result)
{
- print_sys_errmsg (pi.pathname, errno);
- printf ("PIOCSRLC or PIOCSET failed.\n");
+ print_sys_errmsg (pi->pathname, errno);
+ printf_unfiltered ("PIOCSRLC or PIOCSET failed.\n");
}
}
}
}
- close_proc_file (&pi);
+ close_proc_file (pi);
attach_flag = 0;
}
SYNOPSIS
- int procfs_wait (int *statloc)
+ int procfs_wait (int pid, int *statloc)
DESCRIPTION
*/
static int
-procfs_wait (statloc)
- int *statloc;
+procfs_wait (pid, statloc)
+ int pid;
+ struct target_waitstatus *ourstatus;
{
short what;
short why;
int statval = 0;
int checkerr = 0;
int rtnval = -1;
-
- if (ioctl (pi.fd, PIOCSTATUS, &pi.prstatus) < 0)
- {
- checkerr++;
- }
- else if (!(pi.prstatus.pr_flags & (PR_STOPPED | PR_ISTOP)))
- {
- if (attach_flag)
- set_sigint_trap(); /* Causes SIGINT to be passed on to the
- attached process. */
+ struct procinfo *pi;
+
+ if (pid != -1) /* Non-specific process? */
+ pi = NULL;
+ else
+ for (pi = procinfo_list; pi; pi = pi->next)
+ if (pi->had_event)
+ break;
+
+wait_again:
+
+ if (!pi)
+ pi = wait_fd ();
+
+ if (pid != -1)
+ for (pi = procinfo_list; pi; pi = pi->next)
+ if (pi->pid == pid && pi->had_event)
+ break;
- if (ioctl (pi.fd, PIOCWSTOP, &pi.prstatus) < 0)
+ if (!pi && !checkerr)
+ goto wait_again;
+
+ if (!checkerr && !(pi->prstatus.pr_flags & (PR_STOPPED | PR_ISTOP)))
+ {
+ if (ioctl (pi->fd, PIOCWSTOP, &pi->prstatus) < 0)
{
checkerr++;
}
-
- if (attach_flag)
- clear_sigint_trap();
}
if (checkerr)
{
rtnval = wait (&statval);
if (rtnval != inferior_pid)
{
- print_sys_errmsg (pi.pathname, errno);
+ print_sys_errmsg (pi->pathname, errno);
error ("PIOCWSTOP, wait failed, returned %d", rtnval);
/* NOTREACHED */
}
}
else
{
- print_sys_errmsg (pi.pathname, errno);
+ print_sys_errmsg (pi->pathname, errno);
error ("PIOCSTATUS or PIOCWSTOP failed.");
/* NOTREACHED */
}
}
- else if (pi.prstatus.pr_flags & (PR_STOPPED | PR_ISTOP))
+ else if (pi->prstatus.pr_flags & (PR_STOPPED | PR_ISTOP))
{
- rtnval = pi.prstatus.pr_pid;
- why = pi.prstatus.pr_why;
- what = pi.prstatus.pr_what;
- if (why == PR_SIGNALLED)
+ rtnval = pi->prstatus.pr_pid;
+ why = pi->prstatus.pr_why;
+ what = pi->prstatus.pr_what;
+
+ switch (why)
{
+ case PR_SIGNALLED:
statval = (what << 8) | 0177;
- }
- else if ((why == PR_SYSEXIT)
- &&
- (
+ break;
+ case PR_SYSENTRY:
+ if (what != SYS_exit)
+ error ("PR_SYSENTRY, unknown system call %d", what);
+
+ pi->prrun.pr_flags = PRCFAULT;
+
+ if (ioctl (pi->fd, PIOCRUN, &pi->prrun) != 0)
+ perror_with_name (pi->pathname);
+
+ rtnval = wait (&statval);
+
+ break;
+ case PR_SYSEXIT:
+ switch (what)
+ {
#ifdef SYS_exec
- what == SYS_exec
-#else
- 0 == 0
+ case SYS_exec:
#endif
#ifdef SYS_execve
- || what == SYS_execve
+ case SYS_execve:
#endif
#ifdef SYS_execv
- || what == SYS_execv
+ case SYS_execv:
#endif
- ))
- {
- statval = (SIGTRAP << 8) | 0177;
- }
- else if (why == PR_REQUESTED)
- {
+ statval = (SIGTRAP << 8) | 0177;
+ break;
+#ifdef SYS_sproc
+ case SYS_sproc:
+/* We've just detected the completion of an sproc system call. Now we need to
+ setup a procinfo struct for this thread, and notify the thread system of the
+ new arrival. */
+
+/* If sproc failed, then nothing interesting happened. Continue the process and
+ go back to sleep. */
+
+ if (pi->prstatus.pr_errno != 0)
+ {
+ pi->prrun.pr_flags &= PRSTEP;
+ pi->prrun.pr_flags |= PRCFAULT;
+
+ if (ioctl (pi->fd, PIOCRUN, &pi->prrun) != 0)
+ perror_with_name (pi->pathname);
+
+ goto wait_again;
+ }
+
+/* At this point, the new thread is stopped at it's first instruction, and
+ the parent is stopped at the exit from sproc. */
+
+/* Notify the caller of the arrival of a new thread. */
+ create_procinfo (pi->prstatus.pr_rval1);
+
+ rtnval = pi->prstatus.pr_rval1;
+ statval = (SIGTRAP << 8) | 0177;
+
+ break;
+#endif /* SYS_sproc */
+
+ default:
+ error ("PIOCSTATUS (PR_SYSEXIT): Unknown system call %d", what);
+ }
+ break;
+ case PR_REQUESTED:
statval = (SIGSTOP << 8) | 0177;
- }
- else if (why == PR_JOBCONTROL)
- {
+ break;
+ case PR_JOBCONTROL:
statval = (what << 8) | 0177;
- }
- else if (why == PR_FAULTED)
- {
+ break;
+ case PR_FAULTED:
switch (what)
{
case FLTPRIV:
break;
case FLTPAGE: /* Recoverable page fault */
default:
- rtnval = -1;
error ("PIOCWSTOP, unknown why %d, what %d", why, what);
- /* NOTREACHED */
}
- }
- else
- {
- rtnval = -1;
+ break;
+ default:
error ("PIOCWSTOP, unknown why %d, what %d", why, what);
- /* NOTREACHED */
}
+/* Stop all the other threads when any of them stops. */
+
+ {
+ struct procinfo *procinfo;
+
+ for (procinfo = procinfo_list; procinfo; procinfo = procinfo->next)
+ {
+ if (!procinfo->had_event)
+ if (ioctl (procinfo->fd, PIOCSTOP, &procinfo->prstatus) < 0)
+ {
+ print_sys_errmsg (procinfo->pathname, errno);
+ error ("PIOCSTOP failed");
+ }
+ }
+ }
}
else
{
error ("PIOCWSTOP, stopped for unknown/unhandled reason, flags %#x",
- pi.prstatus.pr_flags);
- /* NOTREACHED */
+ pi->prstatus.pr_flags);
}
- if (statloc)
- {
- *statloc = statval;
- }
+ store_waitstatus (ourstatus, statval);
if (rtnval == -1) /* No more children to wait for */
{
- fprintf (stderr, "Child process unexpectedly missing.\n");
- *statloc = 42; /* Claim it exited with signal 42 */
+ fprintf_unfiltered (gdb_stderr, "Child process unexpectedly missing.\n");
+ /* Claim it exited with unknown signal. */
+ ourstatus->kind = TARGET_WAITKIND_SIGNALLED;
+ ourstatus->value.sig = TARGET_SIGNAL_UNKNOWN;
return rtnval;
}
+ pi->had_event = 0; /* Indicate that we've seen this one */
return (rtnval);
}
struct siginfo newsiginfo;
struct siginfo *sip;
- if (pip -> valid)
+ if (signo == pip -> prstatus.pr_info.si_signo)
{
- if (signo == pip -> prstatus.pr_info.si_signo)
- {
- sip = &pip -> prstatus.pr_info;
- }
- else
- {
- memset ((char *) &newsiginfo, 0, sizeof (newsiginfo));
- sip = &newsiginfo;
- sip -> si_signo = signo;
- sip -> si_code = 0;
- sip -> si_errno = 0;
- sip -> si_pid = getpid ();
- sip -> si_uid = getuid ();
- }
- if (ioctl (pip -> fd, PIOCSSIG, sip) < 0)
- {
- print_sys_errmsg (pip -> pathname, errno);
- warning ("PIOCSSIG failed");
- }
+ sip = &pip -> prstatus.pr_info;
+ }
+ else
+ {
+ memset ((char *) &newsiginfo, 0, sizeof (newsiginfo));
+ sip = &newsiginfo;
+ sip -> si_signo = signo;
+ sip -> si_code = 0;
+ sip -> si_errno = 0;
+ sip -> si_pid = getpid ();
+ sip -> si_uid = getuid ();
+ }
+ if (ioctl (pip -> fd, PIOCSSIG, sip) < 0)
+ {
+ print_sys_errmsg (pip -> pathname, errno);
+ warning ("PIOCSSIG failed");
}
}
-/*
-
-LOCAL FUNCTION
-
- procfs_resume -- resume execution of the inferior process
-
-SYNOPSIS
-
- void procfs_resume (int step, int signo)
+/* Resume execution of process PID. If STEP is nozero, then
+ just single step it. If SIGNAL is nonzero, restart it with that
+ signal activated. */
-DESCRIPTION
+static void
+procfs_resume (pid, step, signo)
+ int pid;
+ int step;
+ enum target_signal signo;
+{
+ int signal_to_pass;
+ struct procinfo *pi, *procinfo;
- Resume execution of the inferior process. If STEP is nozero, then
- just single step it. If SIGNAL is nonzero, restart it with that
- signal activated.
+ pi = find_procinfo (pid == -1 ? inferior_pid : pid, 0);
-NOTE
+ errno = 0;
+ pi->prrun.pr_flags = PRSTRACE | PRSFAULT | PRCFAULT;
- It may not be absolutely necessary to specify the PC value for
+#if 0
+ /* It should not be necessary. If the user explicitly changes the value,
+ value_assign calls write_register_bytes, which writes it. */
+/* It may not be absolutely necessary to specify the PC value for
restarting, but to be safe we use the value that gdb considers
to be current. One case where this might be necessary is if the
user explicitly changes the PC value that gdb considers to be
- current. FIXME: Investigate if this is necessary or not.
-
- When attaching to a child process, if we forced it to stop with
- a PIOCSTOP, then we will have set the nopass_next_sigstop flag.
- Upon resuming the first time after such a stop, we explicitly
- inhibit sending it another SIGSTOP, which would be the normal
- result of default signal handling. One potential drawback to
- this is that we will also ignore any attempt to by the user
- to explicitly continue after the attach with a SIGSTOP. Ultimately
- this problem should be dealt with by making the routines that
- deal with the inferior a little smarter, and possibly even allow
- an inferior to continue running at the same time as gdb. (FIXME?)
- */
-
-static void
-procfs_resume (step, signo)
- int step;
- int signo;
-{
- errno = 0;
- pi.prrun.pr_flags = PRSTRACE | PRSFAULT | PRCFAULT;
+ current. FIXME: Investigate if this is necessary or not. */
#ifdef PRSVADDR_BROKEN
/* Can't do this under Solaris running on a Sparc, as there seems to be no
random garbage. We have to rely on the fact that PC and nPC have been
written previously via PIOCSREG during a register flush. */
- pi.prrun.pr_vaddr = (caddr_t) *(int *) ®isters[REGISTER_BYTE (PC_REGNUM)];
- pi.prrun.pr_flags != PRSVADDR;
-#endif
+ pi->prrun.pr_vaddr = (caddr_t) *(int *) ®isters[REGISTER_BYTE (PC_REGNUM)];
+ pi->prrun.pr_flags != PRSVADDR;
+#endif
+#endif
+
+ if (signo == TARGET_SIGNAL_STOP && pi->nopass_next_sigstop)
+ /* When attaching to a child process, if we forced it to stop with
+ a PIOCSTOP, then we will have set the nopass_next_sigstop flag.
+ Upon resuming the first time after such a stop, we explicitly
+ inhibit sending it another SIGSTOP, which would be the normal
+ result of default signal handling. One potential drawback to
+ this is that we will also ignore any attempt to by the user
+ to explicitly continue after the attach with a SIGSTOP. Ultimately
+ this problem should be dealt with by making the routines that
+ deal with the inferior a little smarter, and possibly even allow
+ an inferior to continue running at the same time as gdb. (FIXME?) */
+ signal_to_pass = 0;
+ else if (signo == TARGET_SIGNAL_TSTP
+ && pi->prstatus.pr_cursig == SIGTSTP
+ && pi->prstatus.pr_action.sa_handler == SIG_DFL)
+
+ /* We are about to pass the inferior a SIGTSTP whose action is
+ SIG_DFL. The SIG_DFL action for a SIGTSTP is to stop
+ (notifying the parent via wait()), and then keep going from the
+ same place when the parent is ready for you to keep going. So
+ under the debugger, it should do nothing (as if the program had
+ been stopped and then later resumed. Under ptrace, this
+ happens for us, but under /proc, the system obligingly stops
+ the process, and wait_for_inferior would have no way of
+ distinguishing that type of stop (which indicates that we
+ should just start it again), with a stop due to the pr_trace
+ field of the prrun_t struct.
+
+ Note that if the SIGTSTP is being caught, we *do* need to pass it,
+ because the handler needs to get executed. */
+ signal_to_pass = 0;
+ else
+ signal_to_pass = target_signal_to_host (signo);
- if (signo && !(signo == SIGSTOP && pi.nopass_next_sigstop))
+ if (signal_to_pass)
{
- set_proc_siginfo (&pi, signo);
+ set_proc_siginfo (pi, signal_to_pass);
}
else
{
- pi.prrun.pr_flags |= PRCSIG;
+ pi->prrun.pr_flags |= PRCSIG;
}
- pi.nopass_next_sigstop = 0;
+ pi->nopass_next_sigstop = 0;
if (step)
{
- pi.prrun.pr_flags |= PRSTEP;
+ pi->prrun.pr_flags |= PRSTEP;
}
- if (ioctl (pi.fd, PIOCRUN, &pi.prrun) != 0)
+ if (ioctl (pi->fd, PIOCRUN, &pi->prrun) != 0)
{
- perror_with_name (pi.pathname);
+ perror_with_name (pi->pathname);
/* NOTREACHED */
}
+
+ pi->had_event = 0;
+
+ /* Continue all the other threads that haven't had an event of
+ interest. */
+
+ if (pid == -1)
+ for (procinfo = procinfo_list; procinfo; procinfo = procinfo->next)
+ {
+ if (pi != procinfo && !procinfo->had_event)
+ {
+ procinfo->prrun.pr_flags &= PRSTEP;
+ procinfo->prrun.pr_flags |= PRCFAULT | PRCSIG;
+ ioctl (procinfo->fd, PIOCSTATUS, &procinfo->prstatus);
+ if (ioctl (procinfo->fd, PIOCRUN, &procinfo->prrun) < 0)
+ {
+ if (ioctl (procinfo->fd, PIOCSTATUS, &procinfo->prstatus) < 0)
+ {
+ fprintf_unfiltered(gdb_stderr, "PIOCSTATUS failed, errno=%d\n", errno);
+ }
+ print_sys_errmsg (procinfo->pathname, errno);
+ error ("PIOCRUN failed");
+ }
+ ioctl (procinfo->fd, PIOCSTATUS, &procinfo->prstatus);
+ }
+ }
}
/*
procfs_fetch_registers (regno)
int regno;
{
- if (ioctl (pi.fd, PIOCGREG, &pi.gregset) != -1)
+ struct procinfo *pi;
+
+ pi = current_procinfo;
+
+ if (ioctl (pi->fd, PIOCGREG, &pi->gregset) != -1)
{
- supply_gregset (&pi.gregset);
+ supply_gregset (&pi->gregset);
}
#if defined (FP0_REGNUM)
- if (ioctl (pi.fd, PIOCGFPREG, &pi.fpregset) != -1)
+ if (ioctl (pi->fd, PIOCGFPREG, &pi->fpregset) != -1)
{
- supply_fpregset (&pi.fpregset);
+ supply_fpregset (&pi->fpregset);
}
#endif
}
LOCAL FUNCTION
- proc_init_failed - called whenever /proc access initialization fails
+ proc_init_failed - called whenever /proc access initialization
+fails
SYNOPSIS
- static void proc_init_failed (char *why)
+ static void proc_init_failed (struct procinfo *pi, char *why)
DESCRIPTION
*/
static void
-proc_init_failed (why)
+proc_init_failed (pi, why)
+ struct procinfo *pi;
char *why;
{
- print_sys_errmsg (pi.pathname, errno);
- kill (pi.pid, SIGKILL);
- close_proc_file (&pi);
+ print_sys_errmsg (pi->pathname, errno);
+ kill (pi->pid, SIGKILL);
+ close_proc_file (pi);
error (why);
/* NOTREACHED */
}
close_proc_file (pip)
struct procinfo *pip;
{
- pip -> pid = 0;
- if (pip -> valid)
- {
- close (pip -> fd);
- }
- pip -> fd = -1;
- if (pip -> pathname)
- {
- free (pip -> pathname);
- pip -> pathname = NULL;
- }
- pip -> valid = 0;
+ struct procinfo *procinfo;
+
+ remove_fd (pip); /* Remove fd from poll/select list */
+
+ close (pip -> fd);
+
+ free (pip -> pathname);
+
+ /* Unlink pip from the procinfo chain. Note pip might not be on the list. */
+
+ if (procinfo_list == pip)
+ procinfo_list = pip->next;
+ else
+ for (procinfo = procinfo_list; procinfo; procinfo = procinfo->next)
+ if (procinfo->next == pip)
+ procinfo->next = pip->next;
+
+ free (pip);
}
/*
struct procinfo *pip;
int mode;
{
- pip -> valid = 0; /* FIXME, what is this? ?! */
- if (pip -> valid)
- {
- close (pip -> fd);
- }
- if (pip -> pathname == NULL)
- {
- pip -> pathname = xmalloc (32);
- }
+ pip -> next = NULL;
+ pip -> had_event = 0;
+ pip -> pathname = xmalloc (32);
+ pip -> pid = pid;
+
sprintf (pip -> pathname, PROC_NAME_FMT, pid);
- if ((pip -> fd = open (pip -> pathname, mode)) >= 0)
- {
- pip -> valid = 1;
- pip -> pid = pid;
- }
- return (pip -> valid);
+ if ((pip -> fd = open (pip -> pathname, mode)) < 0)
+ return 0;
+
+ return 1;
}
static char *
}
if (sip -> si_code <= 0)
{
- printf_filtered ("sent by pid %d, uid %d ", sip -> si_pid,
+ printf_filtered ("sent by %s, uid %d ",
+ target_pid_to_str (sip -> si_pid),
sip -> si_uid);
}
else
}
else if ((sip -> si_signo == SIGCHLD))
{
- printf_filtered ("child pid %u, status %u ",
- sip -> si_pid,
+ printf_filtered ("child %s, status %u ",
+ target_pid_to_str (sip -> si_pid),
sip -> si_status);
}
else if ((sip -> si_signo == SIGPOLL))
}
if (sip -> si_code <= 0)
{
- printf_filtered ("\t%-16u %s\n", sip -> si_pid,
+ printf_filtered ("\t%-16u %s\n", sip -> si_pid, /* XXX need target_pid_to_str() */
"PID of process sending signal");
printf_filtered ("\t%-16u %s\n", sip -> si_uid,
"UID of process sending signal");
}
else if ((sip -> si_signo == SIGCHLD))
{
- printf_filtered ("\t%-16u %s.\n", sip -> si_pid,
+ printf_filtered ("\t%-16u %s.\n", sip -> si_pid, /* XXX need target_pid_to_str() */
"Child process ID");
printf_filtered ("\t%-16u %s.\n", sip -> si_status,
"Child process exit value or signal");
int from_tty;
{
int pid;
- struct procinfo pii;
struct procinfo *pip;
struct cleanup *old_chain;
char **argv;
old_chain = make_cleanup (null_cleanup, 0);
- /* Default to using the current inferior if no pid specified */
+ /* Default to using the current inferior if no pid specified. Note
+ that inferior_pid may be 0, hence we set okerr. */
- pip = π
+ pip = find_procinfo (inferior_pid, 1);
if (args != NULL)
{
summary = 0;
times = 1;
}
- else if ((pii.pid = atoi (*argv)) > 0)
+ else if ((pid = atoi (*argv)) > 0)
{
- pid = pii.pid;
- pip = &pii;
- memset (&pii, 0, sizeof (pii));
+ pip = (struct procinfo *) xmalloc (sizeof (struct procinfo));
+ memset (pip, 0, sizeof (*pip));
+
+ pip->pid = pid;
if (!open_proc_file (pid, pip, O_RDONLY))
{
perror_with_name (pip -> pathname);
/* If we don't have a valid open process at this point, then we have no
inferior or didn't specify a specific pid. */
- if (!pip -> valid)
+ if (!pip)
{
- error ("No process. Run an inferior or specify an explicit pid.");
+ error ("\
+No process. Start debugging a program or specify an explicit process ID.");
}
if (ioctl (pip -> fd, PIOCSTATUS, &(pip -> prstatus)) < 0)
{
do_cleanups (old_chain);
}
+/*
+
+LOCAL FUNCTION
+
+ procfs_set_sproc_trap -- arrange for exec'd child stop on sproc
+
+SYNOPSIS
+
+ void procfs_set_sproc_trap (void)
+
+DESCRIPTION
+
+ This function sets up a trap on sproc system call exits so that we can
+ detect the arrival of a new thread. We are called with the child
+ stopped prior to it's first instruction.
+
+ Also note that we turn on the inherit-on-fork flag in the child process
+ so that any grand-children start with all tracing flags set.
+ */
+
+#ifdef SYS_sproc
+
+static void
+procfs_set_sproc_trap (pi)
+ struct procinfo *pi;
+{
+ sysset_t exitset;
+
+ if (ioctl (pi->fd, PIOCGEXIT, &exitset) < 0)
+ {
+ print_sys_errmsg (pi->pathname, errno);
+ error ("PIOCGEXIT failed");
+ }
+
+ praddset (&exitset, SYS_sproc);
+
+ if (ioctl (pi->fd, PIOCSEXIT, &exitset) < 0)
+ {
+ print_sys_errmsg (pi->pathname, errno);
+ error ("PIOCSEXIT failed");
+ }
+
+ /* Turn on inherit-on-fork flag so that all grand-children of gdb start with
+ tracing flags set. */
+
+#ifdef PIOCSET /* New method */
+ {
+ long pr_flags;
+ pr_flags = PR_FORK;
+ ioctl (pi->fd, PIOCSET, &pr_flags);
+ }
+#else
+#ifdef PIOCSFORK /* Original method */
+ ioctl (pi->fd, PIOCSFORK, NULL);
+#endif
+#endif
+}
+#endif /* SYS_sproc */
+
/* Fork an inferior process, and start debugging it with /proc. */
static void
proc_set_exec_trap, procfs_init_inferior);
/* We are at the first instruction we care about. */
/* Pedal to the metal... */
- proceed ((CORE_ADDR) -1, 0, 0);
+
+ /* Setup traps on exit from sproc() */
+
+#ifdef SYS_sproc
+ procfs_set_sproc_trap (current_procinfo);
+#endif
+
+ proceed ((CORE_ADDR) -1, TARGET_SIGNAL_0, 0);
}
/* Clean up after the inferior dies. */
static void
procfs_mourn_inferior ()
{
+ struct procinfo *pi;
+
+ for (pi = procinfo_list; pi; pi = pi->next)
+ unconditionally_kill_inferior (pi);
+
unpush_target (&procfs_ops);
generic_mourn_inferior ();
}
OPS_MAGIC /* to_magic */
};
-/*
-
-GLOBAL FUNCTION
-
- _initialize_procfs -- initialize the process file system stuff
-
-SYNOPSIS
-
- void _initialize_procfs (void)
-
-DESCRIPTION
-
- Do required initializations during gdb startup for using the
- /proc file system interface.
-
-*/
-
void
_initialize_procfs ()
{
projects / deliverable / binutils-gdb.git / blobdiff