/* Machine independent support for SVR4 /proc (process file system) for GDB.
- Copyright 1991, 1992-96, 1997 Free Software Foundation, Inc.
+ Copyright 1991, 1992-97, 1998 Free Software Foundation, Inc.
Written by Fred Fish at Cygnus Support. Changes for sysv4.2mp procfs
compatibility by Geoffrey Noer at Cygnus Solutions.
#include "gdbcore.h"
#include "gdbthread.h"
+#if !defined(SYS_lwp_create) && defined(SYS_lwpcreate)
+# define SYS_lwp_create SYS_lwpcreate
+#endif
+
+#if !defined(SYS_lwp_exit) && defined(SYS_lwpexit)
+# define SYS_lwp_exit SYS_lwpexit
+#endif
+
+#if !defined(SYS_lwp_wait) && defined(SYS_lwpwait)
+# define SYS_lwp_wait SYS_lwpwait
+#endif
+
+#if !defined(SYS_lwp_self) && defined(SYS_lwpself)
+# define SYS_lwp_self SYS_lwpself
+#endif
+
+#if !defined(SYS_lwp_info) && defined(SYS_lwpinfo)
+# define SYS_lwp_info SYS_lwpinfo
+#endif
+
+#if !defined(SYS_lwp_private) && defined(SYS_lwpprivate)
+# define SYS_lwp_private SYS_lwpprivate
+#endif
+
+#if !defined(SYS_lwp_kill) && defined(SYS_lwpkill)
+# define SYS_lwp_kill SYS_lwpkill
+#endif
+
+#if !defined(SYS_lwp_suspend) && defined(SYS_lwpsuspend)
+# define SYS_lwp_suspend SYS_lwpsuspend
+#endif
+
+#if !defined(SYS_lwp_continue) && defined(SYS_lwpcontinue)
+# define SYS_lwp_continue SYS_lwpcontinue
+#endif
+
/* the name of the proc status struct depends on the implementation */
#ifdef HAVE_PSTATUS_T
typedef pstatus_t gdb_prstatus_t;
/* proc name formats may vary depending on the proc implementation */
#ifdef HAVE_MULTIPLE_PROC_FDS
- #ifndef CTL_PROC_NAME_FMT
- #define CTL_PROC_NAME_FMT "/proc/%d/ctl"
- #define AS_PROC_NAME_FMT "/proc/%d/as"
- #define MAP_PROC_NAME_FMT "/proc/%d/map"
- #define STATUS_PROC_NAME_FMT "/proc/%d/status"
- #endif
+# ifndef CTL_PROC_NAME_FMT
+# define CTL_PROC_NAME_FMT "/proc/%d/ctl"
+# define AS_PROC_NAME_FMT "/proc/%d/as"
+# define MAP_PROC_NAME_FMT "/proc/%d/map"
+# define STATUS_PROC_NAME_FMT "/proc/%d/status"
+# endif
#else /* HAVE_MULTIPLE_PROC_FDS */
- #ifndef CTL_PROC_NAME_FMT
- #define CTL_PROC_NAME_FMT "/proc/%05d"
- #define AS_PROC_NAME_FMT "/proc/%05d"
- #define MAP_PROC_NAME_FMT "/proc/%05d"
- #define STATUS_PROC_NAME_FMT "/proc/%05d"
- #endif
+# ifndef CTL_PROC_NAME_FMT
+# define CTL_PROC_NAME_FMT "/proc/%05d"
+# define AS_PROC_NAME_FMT "/proc/%05d"
+# define MAP_PROC_NAME_FMT "/proc/%05d"
+# define STATUS_PROC_NAME_FMT "/proc/%05d"
+# endif
#endif /* HAVE_MULTIPLE_PROC_FDS */
+
+/* These #ifdefs are for sol2.x in particular. sol2.x has
+ both a "gregset_t" and a "prgregset_t", which have
+ similar uses but different layouts. sol2.x gdb tries to
+ use prgregset_t (and prfpregset_t) everywhere. */
+
+#ifdef GDB_GREGSET_TYPE
+ typedef GDB_GREGSET_TYPE gdb_gregset_t;
+#else
+ typedef gregset_t gdb_gregset_t;
+#endif
+
+#ifdef GDB_FPREGSET_TYPE
+ typedef GDB_FPREGSET_TYPE gdb_fpregset_t;
+#else
+ typedef fpregset_t gdb_fpregset_t;
+#endif
+
+
#define MAX_PROC_NAME_SIZE sizeof("/proc/1234567890/status")
extern struct target_ops procfs_ops; /* Forward declaration */
/* set general registers */
struct greg_ctl {
int cmd;
- gregset_t gregset;
+ gdb_gregset_t gregset;
};
/* set fp registers */
struct fpreg_ctl {
int cmd;
- fpregset_t fpregset;
+ gdb_fpregset_t fpregset;
};
/* set signals to be traced */
struct sig_ctl saved_trace; /* Saved traced signal set */
struct sys_ctl saved_exitset; /* Saved traced system call exit set */
struct sys_ctl saved_entryset;/* Saved traced system call entry set */
- int num_syscall_handlers; /* Number of syscall handlers currently installed */
- struct procfs_syscall_handler *syscall_handlers; /* Pointer to list of syscall trap handlers */
+ int num_syscall_handlers; /* Number of syscall trap handlers
+ currently installed */
+ /* Pointer to list of syscall trap handlers */
+ struct procfs_syscall_handler *syscall_handlers;
+ int saved_rtnval; /* return value and status for wait(), */
+ int saved_statval; /* as supplied by a syscall handler. */
int new_child; /* Non-zero if it's a new thread */
};
/* 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 */
#endif
#if defined (PR_PCOMPAT)
{ PR_PCOMPAT, "PR_PCOMPAT", "Ptrace compatibility mode in effect" },
+#endif
+#if defined (PR_MSACCT)
+ { PR_MSACCT, "PR_MSACCT", "Microstate accounting enabled" },
+#endif
+#if defined (PR_BPTADJ)
+ { PR_BPTADJ, "PR_BPTADJ", "Breakpoint PC adjustment in effect" },
+#endif
+#if defined (PR_ASLWP)
+ { PR_ASLWP, "PR_ASLWP", "Asynchronus signal LWP" },
#endif
{ 0, NULL, NULL }
};
#if defined (PR_SIGNALLED)
{ PR_SIGNALLED, "PR_SIGNALLED", "Receipt of a traced signal" },
#endif
-#if defined (PR_FAULTED)
- { PR_FAULTED, "PR_FAULTED", "Incurred a traced hardware fault" },
-#endif
#if defined (PR_SYSENTRY)
{ PR_SYSENTRY, "PR_SYSENTRY", "Entry to a traced system call" },
#endif
#if defined (PR_JOBCONTROL)
{ PR_JOBCONTROL, "PR_JOBCONTROL", "Default job control stop signal action" },
#endif
+#if defined (PR_FAULTED)
+ { PR_FAULTED, "PR_FAULTED", "Incurred a traced hardware fault" },
+#endif
#if defined (PR_SUSPENDED)
{ PR_SUSPENDED, "PR_SUSPENDED", "Process suspended" },
+#endif
+#if defined (PR_CHECKPOINT)
+ { PR_CHECKPOINT, "PR_CHECKPOINT", "(???)" },
#endif
{ 0, NULL, NULL }
};
static void proc_set_exec_trap PARAMS ((void));
-static int procfs_init_inferior PARAMS ((int));
+static void procfs_init_inferior PARAMS ((int));
static struct procinfo *create_procinfo PARAMS ((int));
static void unconditionally_kill_inferior PARAMS ((struct procinfo *));
-static NORETURN void proc_init_failed PARAMS ((struct procinfo *, char *)) ATTR_NORETURN;
+static NORETURN void proc_init_failed PARAMS ((struct procinfo *, char *, int)) ATTR_NORETURN;
static void info_proc PARAMS ((char *, int));
static struct procinfo *find_procinfo PARAMS ((pid_t pid, int okfail));
-static int procfs_read_status PARAMS ((struct procinfo *));
static int procfs_write_pcwstop PARAMS ((struct procinfo *));
+static int procfs_read_status PARAMS ((struct procinfo *));
static void procfs_write_pckill PARAMS ((struct procinfo *));
typedef int syscall_func_t PARAMS ((struct procinfo *pi, int syscall_num,
/* External function prototypes that can't be easily included in any
header file because the args are typedefs in system include files. */
-extern void supply_gregset PARAMS ((gregset_t *));
+extern void supply_gregset PARAMS ((gdb_gregset_t *));
-extern void fill_gregset PARAMS ((gregset_t *, int));
+extern void fill_gregset PARAMS ((gdb_gregset_t *, int));
#ifdef FP0_REGNUM
-extern void supply_fpregset PARAMS ((fpregset_t *));
+extern void supply_fpregset PARAMS ((gdb_fpregset_t *));
-extern void fill_fpregset PARAMS ((fpregset_t *, int));
+extern void fill_fpregset PARAMS ((gdb_fpregset_t *, int));
#endif
/*
num_poll_list++;
}
+/*
+
+LOCAL FUNCTION
+
+ remove_fd -- Remove the fd from the poll/select list
+
+SYNOPSIS
+
+ static void remove_fd (struct procinfo *);
+
+DESCRIPTION
+
+ Remove the fd of the supplied procinfo from the list of fds used
+ for poll/select operations.
+ */
+
static void
remove_fd (pi)
struct procinfo *pi;
static struct procinfo *
wait_fd ()
{
- struct procinfo *pi;
+ struct procinfo *pi, *next_pi;
#ifndef LOSING_POLL
int num_fds;
int i;
attached process. */
set_sigio_trap ();
+ wait_again:
#ifndef LOSING_POLL
while (1)
{
for (i = 0; i < num_poll_list && num_fds > 0; i++)
{
- if ((poll_list[i].revents & (POLLWRNORM|POLLPRI|POLLERR|POLLHUP|POLLNVAL)) == 0)
+ if (0 == (poll_list[i].revents &
+ (POLLWRNORM | POLLPRI | POLLERR | POLLHUP | POLLNVAL)))
continue;
- for (pi = procinfo_list; pi; pi = pi->next)
+ for (pi = procinfo_list; pi; pi = next_pi)
{
+ next_pi = pi->next;
if (poll_list[i].fd == pi->ctl_fd)
{
- if (!procfs_read_status(pi))
- {
- print_sys_errmsg (pi->pathname, errno);
- error ("procfs_read_status failed");
- }
-
num_fds--;
+ if ((poll_list[i].revents & POLLHUP) != 0 ||
+ !procfs_read_status(pi))
+ { /* The LWP has apparently terminated. */
+ if (num_poll_list <= 1)
+ {
+ pi->prstatus.pr_flags = 0;
+ pi->had_event = 1;
+ break;
+ }
+ if (info_verbose)
+ printf_filtered ("LWP %d exited.\n",
+ (pi->pid >> 16) & 0xffff);
+ close_proc_file (pi);
+ if (num_fds != 0)
+ continue; /* already another event to process */
+ else
+ goto wait_again; /* wait for another event */
+ }
pi->had_event = 1;
break;
}
#if defined (SYS_settimeofday)
syscall_table[SYS_settimeofday] = "settimeofday";
#endif
-#if defined (SYS_lwpcreate)
- syscall_table[SYS_lwpcreate] = "lwpcreate";
+#if defined (SYS_lwp_create)
+ syscall_table[SYS_lwp_create] = "_lwp_create";
#endif
-#if defined (SYS_lwpexit)
- syscall_table[SYS_lwpexit] = "lwpexit";
+#if defined (SYS_lwp_exit)
+ syscall_table[SYS_lwp_exit] = "_lwp_exit";
#endif
-#if defined (SYS_lwpwait)
- syscall_table[SYS_lwpwait] = "lwpwait";
+#if defined (SYS_lwp_wait)
+ syscall_table[SYS_lwp_wait] = "_lwp_wait";
#endif
-#if defined (SYS_lwpself)
- syscall_table[SYS_lwpself] = "lwpself";
+#if defined (SYS_lwp_self)
+ syscall_table[SYS_lwp_self] = "_lwp_self";
#endif
-#if defined (SYS_lwpinfo)
- syscall_table[SYS_lwpinfo] = "lwpinfo";
+#if defined (SYS_lwp_info)
+ syscall_table[SYS_lwp_info] = "_lwp_info";
#endif
-#if defined (SYS_lwpprivate)
- syscall_table[SYS_lwpprivate] = "lwpprivate";
+#if defined (SYS_lwp_private)
+ syscall_table[SYS_lwp_private] = "_lwp_private";
#endif
#if defined (SYS_processor_bind)
syscall_table[SYS_processor_bind] = "processor_bind";
#if defined (SYS_ftruncate)
syscall_table[SYS_ftruncate] = "ftruncate";
#endif
-#if defined (SYS_lwpkill)
- syscall_table[SYS_lwpkill] = "lwpkill";
+#if defined (SYS_lwp_kill)
+ syscall_table[SYS_lwp_kill] = "_lwp_kill";
#endif
#if defined (SYS_sigwait)
syscall_table[SYS_sigwait] = "sigwait";
#if defined (SYS_getksym)
syscall_table[SYS_getksym] = "getksym";
#endif
-#if defined (SYS_lwpsuspend)
- syscall_table[SYS_lwpsuspend] = "lwpsuspend";
+#if defined (SYS_lwp_suspend)
+ syscall_table[SYS_lwp_suspend] = "_lwp_suspend";
#endif
-#if defined (SYS_lwpcontinue)
- syscall_table[SYS_lwpcontinue] = "lwpcontinue";
+#if defined (SYS_lwp_continue)
+ syscall_table[SYS_lwp_continue] = "_lwp_continue";
#endif
#if defined (SYS_priocntllst)
syscall_table[SYS_priocntllst] = "priocntllst";
syscall_table[SYS_sleep] = "sleep";
#endif
#if defined (SYS_lwp_sema_wait)
- syscall_table[SYS_lwp_sema_wait] = "lwp_sema_wait";
+ syscall_table[SYS_lwp_sema_wait] = "_lwp_sema_wait";
#endif
#if defined (SYS_lwp_sema_post)
- syscall_table[SYS_lwp_sema_post] = "lwp_sema_post";
+ syscall_table[SYS_lwp_sema_post] = "_lwp_sema_post";
#endif
#if defined (SYS_lwp_sema_trywait)
syscall_table[SYS_lwp_sema_trywait] = "lwp_sema_trywait";
#endif
+#if defined(SYS_fstatvfs64)
+ syscall_table[SYS_fstatvfs64] = "fstatvfs64";
+#endif
+#if defined(SYS_statvfs64)
+ syscall_table[SYS_statvfs64] = "statvfs64";
+#endif
+#if defined(SYS_ftruncate64)
+ syscall_table[SYS_ftruncate64] = "ftruncate64";
+#endif
+#if defined(SYS_truncate64)
+ syscall_table[SYS_truncate64] = "truncate64";
+#endif
+#if defined(SYS_getrlimit64)
+ syscall_table[SYS_getrlimit64] = "getrlimit64";
+#endif
+#if defined(SYS_setrlimit64)
+ syscall_table[SYS_setrlimit64] = "setrlimit64";
+#endif
+#if defined(SYS_lseek64)
+ syscall_table[SYS_lseek64] = "lseek64";
+#endif
+#if defined(SYS_mmap64)
+ syscall_table[SYS_mmap64] = "mmap64";
+#endif
+#if defined(SYS_pread64)
+ syscall_table[SYS_pread64] = "pread64";
+#endif
+#if defined(SYS_creat64)
+ syscall_table[SYS_creat64] = "creat64";
+#endif
+#if defined(SYS_dshmsys)
+ syscall_table[SYS_dshmsys] = "dshmsys";
+#endif
+#if defined(SYS_invlpg)
+ syscall_table[SYS_invlpg] = "invlpg";
+#endif
+#if defined(SYS_cg_ids)
+ syscall_table[SYS_cg_ids] = "cg_ids";
+#endif
+#if defined(SYS_cg_processors)
+ syscall_table[SYS_cg_processors] = "cg_processors";
+#endif
+#if defined(SYS_cg_info)
+ syscall_table[SYS_cg_info] = "cg_info";
+#endif
+#if defined(SYS_cg_bind)
+ syscall_table[SYS_cg_bind] = "cg_bind";
+#endif
+#if defined(SYS_cg_current)
+ syscall_table[SYS_cg_current] = "cg_current";
+#endif
+#if defined(SYS_cg_memloc)
+ syscall_table[SYS_cg_memloc] = "cg_memloc";
+#endif
}
/*
procfs_read_status (pi);
memcpy ((char *) &greg.gregset,
(char *) &pi->prstatus.pr_lwp.pr_context.uc_mcontext.gregs,
- sizeof (gregset_t));
+ sizeof (gdb_gregset_t));
}
fill_gregset (&greg.gregset, regno);
greg.cmd = PCSREG;
procfs_read_status (pi);
memcpy ((char *) &fpreg.fpregset,
(char *) &pi->prstatus.pr_lwp.pr_context.uc_mcontext.fpregs,
- sizeof (fpregset_t));
+ sizeof (gdb_fpregset_t));
}
fill_fpregset (&fpreg.fpregset, regno);
fpreg.cmd = PCSFPREG;
LOCAL FUNCTION
- create_procinfo - initialize access to a /proc entry
+ init_procinfo - setup a procinfo struct and connect it to a process
SYNOPSIS
- struct procinfo * create_procinfo (int pid)
+ struct procinfo * init_procinfo (int pid)
DESCRIPTION
Allocate a procinfo structure, open the /proc file and then set up the
set of signals and faults that are to be traced. Returns a pointer to
- the new procinfo structure.
+ the new procinfo structure.
NOTES
*/
static struct procinfo *
-create_procinfo (pid)
+init_procinfo (pid, kill)
int pid;
+ int kill;
{
- struct procinfo *pi;
+ struct procinfo *pi = (struct procinfo *)
+ xmalloc (sizeof (struct procinfo));
struct sig_ctl sctl;
struct flt_ctl fctl;
- pi = find_procinfo (pid, 1);
- if (pi != NULL)
- return pi; /* All done! It already exists */
-
- pi = (struct procinfo *) xmalloc (sizeof (struct procinfo));
-
+ memset ((char *) pi, 0, sizeof (*pi));
if (!open_proc_file (pid, pi, O_RDWR, 1))
- proc_init_failed (pi, "can't open process file");
+ proc_init_failed (pi, "can't open process file", kill);
/* open_proc_file may modify pid. */
add_fd (pi); /* Add to list for poll/select */
- pi->num_syscall_handlers = 0;
- pi->syscall_handlers = NULL;
+ /* Remember some things about the inferior that we will, or might, change
+ so that we can restore them when we detach. */
#ifdef UNIXWARE
+ memcpy ((char *) &pi->saved_trace.sigset,
+ (char *) &pi->prstatus.pr_sigtrace, sizeof (sigset_t));
+ memcpy ((char *) &pi->saved_fltset.fltset,
+ (char *) &pi->prstatus.pr_flttrace, sizeof (fltset_t));
+ memcpy ((char *) &pi->saved_entryset.sysset,
+ (char *) &pi->prstatus.pr_sysentry, sizeof (sysset_t));
+ memcpy ((char *) &pi->saved_exitset.sysset,
+ (char *) &pi->prstatus.pr_sysexit, sizeof (sysset_t));
+
+ /* Set up trace and fault sets, as gdb expects them. */
+
prfillset (&sctl.sigset);
- notice_signals (pi, &sctl);
+ notice_signals (pi, &sctl);
prfillset (&fctl.fltset);
prdelset (&fctl.fltset, FLTPAGE);
-#else /* UNIXWARE */
+
+#else /* ! UNIXWARE */
+ ioctl (pi->ctl_fd, PIOCGTRACE, &pi->saved_trace.sigset);
+ ioctl (pi->ctl_fd, PIOCGHOLD, &pi->saved_sighold.sigset);
+ ioctl (pi->ctl_fd, PIOCGFAULT, &pi->saved_fltset.fltset);
+ ioctl (pi->ctl_fd, PIOCGENTRY, &pi->saved_entryset.sysset);
+ ioctl (pi->ctl_fd, PIOCGEXIT, &pi->saved_exitset.sysset);
+
+ /* Set up trace and fault sets, as gdb expects them. */
+
memset ((char *) &pi->prrun, 0, sizeof (pi->prrun));
prfillset (&pi->prrun.pr_trace);
procfs_notice_signals (pid);
#endif /* UNIXWARE */
if (!procfs_read_status (pi))
- proc_init_failed (pi, "procfs_read_status failed");
+ proc_init_failed (pi, "procfs_read_status failed", kill);
-/* A bug in Solaris (2.5 at least) causes PIOCWSTOP to hang on LWPs that are
- already stopped, even if they all have PR_ASYNC set. */
+ return pi;
+}
+
+/*
+
+LOCAL FUNCTION
+
+ create_procinfo - initialize access to a /proc entry
+
+SYNOPSIS
+
+ struct procinfo * create_procinfo (int pid)
+
+DESCRIPTION
+
+ Allocate a procinfo structure, open the /proc file and then set up the
+ set of signals and faults that are to be traced. Returns a pointer to
+ the new procinfo structure.
+
+NOTES
+
+ If proc_init_failed ever gets called, control returns to the command
+ processing loop via the standard error handling code.
+
+ */
+
+static struct procinfo *
+create_procinfo (pid)
+ int pid;
+{
+ struct procinfo *pi;
+ struct sig_ctl sctl;
+ struct flt_ctl fctl;
+
+ pi = find_procinfo (pid, 1);
+ if (pi != NULL)
+ return pi; /* All done! It already exists */
+
+ pi = init_procinfo (pid, 1);
#ifndef UNIXWARE
+/* A bug in Solaris (2.5 at least) causes PIOCWSTOP to hang on LWPs that are
+ already stopped, even if they all have PR_ASYNC set. */
if (!(pi->prstatus.pr_flags & PR_STOPPED))
#endif
if (!procfs_write_pcwstop (pi))
- proc_init_failed (pi, "procfs_write_pcwstop failed");
+ proc_init_failed (pi, "procfs_write_pcwstop failed", 1);
#ifdef PROCFS_USE_READ_WRITE
fctl.cmd = PCSFAULT;
if (write (pi->ctl_fd, (char *) &fctl, sizeof (struct flt_ctl)) < 0)
- proc_init_failed (pi, "PCSFAULT failed");
+ proc_init_failed (pi, "PCSFAULT failed", 1);
#else
if (ioctl (pi->ctl_fd, PIOCSFAULT, &pi->prrun.pr_fault) < 0)
- proc_init_failed (pi, "PIOCSFAULT failed");
+ proc_init_failed (pi, "PIOCSFAULT failed", 1);
#endif
return pi;
int *rtnvalp;
int *statvalp;
{
+ struct procinfo *temp_pi, *next_pi;
+ struct proc_ctl pctl;
+
+#ifdef UNIXWARE
+ pctl.cmd = PCRUN;
+ pctl.data = PRCFAULT;
+#else
pi->prrun.pr_flags = PRCFAULT;
+#endif
+#ifdef PROCFS_USE_READ_WRITE
+ if (write (pi->ctl_fd, (char *)&pctl, sizeof (struct proc_ctl)) < 0)
+#else
if (ioctl (pi->ctl_fd, PIOCRUN, &pi->prrun) != 0)
+#endif
perror_with_name (pi->pathname);
- *rtnvalp = wait (statvalp);
- if (*rtnvalp >= 0)
- *rtnvalp = pi->pid;
+ if (attach_flag)
+ {
+ /* Claim it exited (don't call wait). */
+ if (info_verbose)
+ printf_filtered ("(attached process has exited)\n");
+ *statvalp = 0;
+ *rtnvalp = inferior_pid;
+ }
+ else
+ {
+ *rtnvalp = wait (statvalp);
+ if (*rtnvalp >= 0)
+ *rtnvalp = pi->pid;
+ }
+ /* Close ALL open proc file handles,
+ except the one that called SYS_exit. */
+ for (temp_pi = procinfo_list; temp_pi; temp_pi = next_pi)
+ {
+ next_pi = temp_pi->next;
+ if (temp_pi == pi)
+ continue; /* Handled below */
+ close_proc_file (temp_pi);
+ }
return 1;
}
LOCAL FUNCTION
- procfs_init_inferior - initialize target vector and access to a
- /proc entry
+ procfs_set_inferior_syscall_traps - setup the syscall traps
SYNOPSIS
- int procfs_init_inferior (int pid)
+ void procfs_set_inferior_syscall_traps (struct procinfo *pip)
DESCRIPTION
- When gdb starts an inferior, this function is called in the parent
- process immediately after the fork. It waits for the child to stop
- on the return from the exec system call (the child itself takes care
- of ensuring that this is set up), then sets up the set of signals
- and faults that are to be traced. Returns the pid, which may have had
- the thread-id added to it.
-
-NOTES
-
- If proc_init_failed ever gets called, control returns to the command
- processing loop via the standard error handling code.
+ Called for each "procinfo" (process, thread, or LWP) in the
+ inferior, to register for notification of and handlers for
+ syscall traps in the inferior.
*/
-static int
-procfs_init_inferior (pid)
- int pid;
+static void
+procfs_set_inferior_syscall_traps (pip)
+ struct procinfo *pip;
{
- struct procinfo *pip;
-
- push_target (&procfs_ops);
-
- pip = create_procinfo (pid);
-
-#ifndef PIOCSSPCACT
procfs_set_syscall_trap (pip, SYS_exit, PROCFS_SYSCALL_ENTRY,
procfs_exit_handler);
+#ifndef PRFS_STOPEXEC
#ifdef SYS_exec
procfs_set_syscall_trap (pip, SYS_exec, PROCFS_SYSCALL_EXIT,
procfs_exec_handler);
procfs_set_syscall_trap (pip, SYS_execve, PROCFS_SYSCALL_EXIT,
procfs_exec_handler);
#endif
-#endif /* PIOCSSPCACT */
+#endif /* PRFS_STOPEXEC */
/* Setup traps on exit from sproc() */
procfs_set_syscall_trap (pip, SYS_lwp_create, PROCFS_SYSCALL_EXIT,
procfs_lwp_creation_handler);
#endif
+}
+
+/*
+
+LOCAL FUNCTION
+
+ procfs_init_inferior - initialize target vector and access to a
+ /proc entry
+
+SYNOPSIS
+
+ void procfs_init_inferior (int pid)
+
+DESCRIPTION
+
+ When gdb starts an inferior, this function is called in the parent
+ process immediately after the fork. It waits for the child to stop
+ on the return from the exec system call (the child itself takes care
+ of ensuring that this is set up), then sets up the set of signals
+ and faults that are to be traced. Returns the pid, which may have had
+ the thread-id added to it.
+
+NOTES
+
+ If proc_init_failed ever gets called, control returns to the command
+ processing loop via the standard error handling code.
+
+ */
+
+static void
+procfs_init_inferior (pid)
+ int pid;
+{
+ struct procinfo *pip;
+
+ push_target (&procfs_ops);
+
+ pip = create_procinfo (pid);
+
+ procfs_set_inferior_syscall_traps (pip);
/* create_procinfo may change the pid, so we have to update inferior_pid
here before calling other gdb routines that need the right pid. */
/* One trap to exec the shell, one to exec the program being debugged. */
startup_inferior (2);
#endif
-
- return pid;
}
/*
#endif
notice_signals (pi, &sctl);
+
+#ifndef UNIXWARE
+ pi->prrun.pr_trace = sctl.sigset;
+#endif
}
static void
premptyset (&exitset.sysset);
premptyset (&entryset.sysset);
-#ifdef PIOCSSPCACT
+#ifdef PRFS_STOPEXEC
/* Under Alpha OSF/1 we have to use a PIOCSSPCACT ioctl to trace
- exits from exec system calls because of the user level loader.
- Starting with OSF/1-4.0, tracing the entry to the exit system
- call no longer works. So we have to use PRFS_STOPTERM to trace
- termination of the inferior. */
+ exits from exec system calls because of the user level loader. */
{
int prfs_flags;
gdb_flush (gdb_stderr);
_exit (127);
}
- prfs_flags |= PRFS_STOPEXEC | PRFS_STOPTERM;
+ prfs_flags |= PRFS_STOPEXEC;
if (ioctl (fd, PIOCSSPCACT, &prfs_flags) < 0)
{
perror (procname);
_exit (127);
}
}
-#else /* PIOCSSPCACT */
+#else /* PRFS_STOPEXEC */
/* GW: Rationale...
Not all systems with /proc have all the exec* syscalls with the same
names. On the SGI, for example, there is no SYS_exec, but there
gdb_flush (gdb_stderr);
_exit (127);
}
+#endif /* PRFS_STOPEXEC */
praddset (&entryset.sysset, SYS_exit);
gdb_flush (gdb_stderr);
_exit (126);
}
-#endif /* PIOCSSPCACT */
/* Turn off inherit-on-fork flag so that all grand-children of gdb
start with tracing flags cleared. */
modify_run_on_last_close_flag (fd, 1);
+#ifndef UNIXWARE /* since this is a solaris-ism, we don't want it */
+ /* NOTE: revisit when doing thread support for UW */
#ifdef PR_ASYNC
{
long pr_flags;
#endif
}
#endif /* PR_ASYNC */
+#endif /* !UNIXWARE */
}
/*
#endif /* 0 */
+#ifndef UNIXWARE
/*
LOCAL FUNCTION
}
return (fd);
}
-
+#endif /* !UNIXWARE */
/* Attach to process PID, then initialize for debugging it
and wait for the trace-trap that results from attaching. */
struct procinfo *pi;
struct sig_ctl sctl;
struct flt_ctl fctl;
+ int nlwp, *lwps;
- pi = (struct procinfo *) xmalloc (sizeof (struct procinfo));
-
- if (!open_proc_file (pid, pi, O_RDWR, 1))
- {
- free (pi);
- perror_with_name (pi->pathname);
- /* NOTREACHED */
- }
-
- pid = pi -> pid;
-
- /* Add new process to process info list */
-
- pi->next = procinfo_list;
- procinfo_list = pi;
+ pi = init_procinfo (pid, 0);
- add_fd (pi); /* Add to list for poll/select */
+#ifdef PIOCLWPIDS
+ nlwp = pi->prstatus.pr_nlwp;
+ lwps = alloca ((2 * nlwp + 2) * sizeof (id_t));
- /* 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 (!procfs_read_status (pi))
+ if (ioctl (pi->ctl_fd, PIOCLWPIDS, lwps))
{
- print_sys_errmsg (pi->pathname, errno);
- close_proc_file (pi);
- error ("procfs_read_status failed");
+ print_sys_errmsg (pi -> pathname, errno);
+ error ("PIOCLWPIDS failed");
}
-#ifdef UNIXWARE
- if (pi->prstatus.pr_lwp.pr_flags & (PR_STOPPED | PR_ISTOP))
-#else
- if (pi->prstatus.pr_flags & (PR_STOPPED | PR_ISTOP))
+#else /* PIOCLWPIDS */
+ nlwp = 1;
+ lwps = alloca ((2 * nlwp + 2) * sizeof *lwps);
+ lwps[0] = 0;
#endif
+ for (; nlwp > 0; nlwp--, lwps++)
{
- pi->was_stopped = 1;
- }
- else
- {
- pi->was_stopped = 0;
- if (1 || query ("Process is currently running, stop it? "))
- {
- long cmd;
- /* Make it run again when we close it. */
-
- modify_run_on_last_close_flag (pi->ctl_fd, 1);
+ /* First one has already been created above. */
+ if ((pi = find_procinfo ((*lwps << 16) | pid, 1)) == 0)
+ pi = init_procinfo ((*lwps << 16) | pid, 0);
-#ifdef PROCFS_USE_READ_WRITE
- cmd = PCSTOP;
- if (write (pi->ctl_fd, (char *) &cmd, sizeof (long)) < 0)
-#else
- if (ioctl (pi->ctl_fd, PIOCSTOP, &pi->prstatus) < 0)
-#endif
- {
- print_sys_errmsg (pi->pathname, errno);
- close_proc_file (pi);
- error ("PIOCSTOP failed");
- }
#ifdef UNIXWARE
- if (!procfs_read_status (pi))
- {
- print_sys_errmsg (pi->pathname, errno);
- close_proc_file (pi);
- error ("procfs_read_status failed");
- }
+ if (pi->prstatus.pr_lwp.pr_flags & (PR_STOPPED | PR_ISTOP))
+#else
+ if (pi->prstatus.pr_flags & (PR_STOPPED | PR_ISTOP))
#endif
- pi->nopass_next_sigstop = 1;
+ {
+ pi->was_stopped = 1;
}
else
{
- printf_unfiltered ("Ok, gdb will wait for %s to stop.\n", target_pid_to_str (pid));
+ pi->was_stopped = 0;
+ if (1 || query ("Process is currently running, stop it? "))
+ {
+ long cmd;
+ /* Make it run again when we close it. */
+ modify_run_on_last_close_flag (pi->ctl_fd, 1);
+#ifdef PROCFS_USE_READ_WRITE
+ cmd = PCSTOP;
+ if (write (pi->ctl_fd, (char *) &cmd, sizeof (long)) < 0)
+#else
+ if (ioctl (pi->ctl_fd, PIOCSTOP, &pi->prstatus) < 0)
+#endif
+ {
+ print_sys_errmsg (pi->pathname, errno);
+ close_proc_file (pi);
+ error ("PIOCSTOP failed");
+ }
+#ifdef UNIXWARE
+ if (!procfs_read_status (pi))
+ {
+ print_sys_errmsg (pi->pathname, errno);
+ close_proc_file (pi);
+ error ("procfs_read_status failed");
+ }
+#endif
+ pi->nopass_next_sigstop = 1;
+ }
+ else
+ {
+ printf_unfiltered ("Ok, gdb will wait for %s to stop.\n",
+ target_pid_to_str (pi->pid));
+ }
}
- }
- /* Remember some things about the inferior that we will, or might, change
- so that we can restore them when we detach. */
#ifdef PROCFS_USE_READ_WRITE
- memcpy ((char *) &pi->saved_trace.sigset,
- (char *) &pi->prstatus.pr_sigtrace, sizeof (sigset_t));
- memcpy ((char *) &pi->saved_fltset.fltset,
- (char *) &pi->prstatus.pr_flttrace, sizeof (fltset_t));
- memcpy ((char *) &pi->saved_entryset.sysset,
- (char *) &pi->prstatus.pr_sysentry, sizeof (sysset_t));
- memcpy ((char *) &pi->saved_exitset.sysset,
- (char *) &pi->prstatus.pr_sysexit, sizeof (sysset_t));
-
- /* Set up trace and fault sets, as gdb expects them. */
-
- prfillset (&sctl.sigset);
- notice_signals (pi, &sctl);
- prfillset (&fctl.fltset);
- prdelset (&fctl.fltset, FLTPAGE);
-
- fctl.cmd = PCSFAULT;
- if (write (pi->ctl_fd, (char *) &fctl, sizeof (struct flt_ctl)) < 0)
- print_sys_errmsg ("PCSFAULT failed", errno);
+ fctl.cmd = PCSFAULT;
+ if (write (pi->ctl_fd, (char *) &fctl, sizeof (struct flt_ctl)) < 0)
+ print_sys_errmsg ("PCSFAULT failed", errno);
#else /* PROCFS_USE_READ_WRITE */
- ioctl (pi->ctl_fd, PIOCGTRACE, &pi->saved_trace.sigset);
- ioctl (pi->ctl_fd, PIOCGHOLD, &pi->saved_sighold.sigset);
- ioctl (pi->ctl_fd, PIOCGFAULT, &pi->saved_fltset.fltset);
- ioctl (pi->ctl_fd, PIOCGENTRY, &pi->saved_entryset.sysset);
- ioctl (pi->ctl_fd, PIOCGEXIT, &pi->saved_exitset.sysset);
-
- /* 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 (pid);
- prfillset (&pi->prrun.pr_fault);
- prdelset (&pi->prrun.pr_fault, FLTPAGE);
-
-#ifdef PROCFS_DONT_TRACE_FAULTS
- premptyset (&pi->prrun.pr_fault);
-#endif
-
- if (ioctl (pi->ctl_fd, PIOCSFAULT, &pi->prrun.pr_fault))
- {
- print_sys_errmsg ("PIOCSFAULT failed", errno);
- }
- if (ioctl (pi->ctl_fd, PIOCSTRACE, &pi->prrun.pr_trace))
- {
- print_sys_errmsg ("PIOCSTRACE failed", errno);
- }
+ if (ioctl (pi->ctl_fd, PIOCSFAULT, &pi->prrun.pr_fault))
+ {
+ print_sys_errmsg ("PIOCSFAULT failed", errno);
+ }
+ if (ioctl (pi->ctl_fd, PIOCSTRACE, &pi->prrun.pr_trace))
+ {
+ print_sys_errmsg ("PIOCSTRACE failed", errno);
+ }
+ add_thread (pi->pid);
+ procfs_set_inferior_syscall_traps (pi);
#endif /* PROCFS_USE_READ_WRITE */
+ }
attach_flag = 1;
- return (pid);
+ return (pi->pid);
}
/*
{
struct procinfo *pi;
- pi = current_procinfo;
-
- if (signal)
+ for (pi = procinfo_list; pi; pi = pi->next)
{
- set_proc_siginfo (pi, signal);
- }
+ if (signal)
+ {
+ set_proc_siginfo (pi, signal);
+ }
#ifdef PROCFS_USE_READ_WRITE
- pi->saved_exitset.cmd = PCSEXIT;
- if (write (pi->ctl_fd, (char *) &pi->saved_exitset,
- sizeof (struct sys_ctl)) < 0)
+ pi->saved_exitset.cmd = PCSEXIT;
+ if (write (pi->ctl_fd, (char *) &pi->saved_exitset,
+ sizeof (struct sys_ctl)) < 0)
#else
- if (ioctl (pi->ctl_fd, PIOCSEXIT, &pi->saved_exitset.sysset) < 0)
+ if (ioctl (pi->ctl_fd, PIOCSEXIT, &pi->saved_exitset.sysset) < 0)
#endif
- {
- print_sys_errmsg (pi->pathname, errno);
- printf_unfiltered ("PIOCSEXIT failed.\n");
- }
+ {
+ print_sys_errmsg (pi->pathname, errno);
+ printf_unfiltered ("PIOCSEXIT failed.\n");
+ }
#ifdef PROCFS_USE_READ_WRITE
- pi->saved_entryset.cmd = PCSENTRY;
- if (write (pi->ctl_fd, (char *) &pi->saved_entryset,
- sizeof (struct sys_ctl)) < 0)
+ pi->saved_entryset.cmd = PCSENTRY;
+ if (write (pi->ctl_fd, (char *) &pi->saved_entryset,
+ sizeof (struct sys_ctl)) < 0)
#else
- if (ioctl (pi->ctl_fd, PIOCSENTRY, &pi->saved_entryset.sysset) < 0)
+ if (ioctl (pi->ctl_fd, PIOCSENTRY, &pi->saved_entryset.sysset) < 0)
#endif
- {
- print_sys_errmsg (pi->pathname, errno);
- printf_unfiltered ("PIOCSENTRY failed.\n");
- }
+ {
+ print_sys_errmsg (pi->pathname, errno);
+ printf_unfiltered ("PIOCSENTRY failed.\n");
+ }
#ifdef PROCFS_USE_READ_WRITE
- pi->saved_trace.cmd = PCSTRACE;
- if (write (pi->ctl_fd, (char *) &pi->saved_trace,
- sizeof (struct sig_ctl)) < 0)
+ pi->saved_trace.cmd = PCSTRACE;
+ if (write (pi->ctl_fd, (char *) &pi->saved_trace,
+ sizeof (struct sig_ctl)) < 0)
#else
- if (ioctl (pi->ctl_fd, PIOCSTRACE, &pi->saved_trace.sigset) < 0)
+ if (ioctl (pi->ctl_fd, PIOCSTRACE, &pi->saved_trace.sigset) < 0)
#endif
- {
- print_sys_errmsg (pi->pathname, errno);
- printf_unfiltered ("PIOCSTRACE failed.\n");
- }
+ {
+ print_sys_errmsg (pi->pathname, errno);
+ printf_unfiltered ("PIOCSTRACE failed.\n");
+ }
#ifndef UNIXWARE
- if (ioctl (pi->ctl_fd, PIOCSHOLD, &pi->saved_sighold.sigset) < 0)
- {
- print_sys_errmsg (pi->pathname, errno);
- printf_unfiltered ("PIOSCHOLD failed.\n");
- }
+ if (ioctl (pi->ctl_fd, PIOCSHOLD, &pi->saved_sighold.sigset) < 0)
+ {
+ print_sys_errmsg (pi->pathname, errno);
+ printf_unfiltered ("PIOSCHOLD failed.\n");
+ }
#endif
#ifdef PROCFS_USE_READ_WRITE
- pi->saved_fltset.cmd = PCSFAULT;
- if (write (pi->ctl_fd, (char *) &pi->saved_fltset,
- sizeof (struct flt_ctl)) < 0)
+ pi->saved_fltset.cmd = PCSFAULT;
+ if (write (pi->ctl_fd, (char *) &pi->saved_fltset,
+ sizeof (struct flt_ctl)) < 0)
#else
- if (ioctl (pi->ctl_fd, PIOCSFAULT, &pi->saved_fltset.fltset) < 0)
+ if (ioctl (pi->ctl_fd, PIOCSFAULT, &pi->saved_fltset.fltset) < 0)
#endif
- {
- print_sys_errmsg (pi->pathname, errno);
- printf_unfiltered ("PIOCSFAULT failed.\n");
- }
- if (!procfs_read_status (pi))
- {
- print_sys_errmsg (pi->pathname, errno);
- printf_unfiltered ("procfs_read_status failed.\n");
- }
- else
- {
+ {
+ print_sys_errmsg (pi->pathname, errno);
+ printf_unfiltered ("PIOCSFAULT failed.\n");
+ }
+ if (!procfs_read_status (pi))
+ {
+ print_sys_errmsg (pi->pathname, errno);
+ printf_unfiltered ("procfs_read_status failed.\n");
+ }
+ else
+ {
#ifdef UNIXWARE
- if (signal || (pi->prstatus.pr_lwp.pr_flags & (PR_STOPPED | PR_ISTOP)))
+ if (signal || (pi->prstatus.pr_lwp.pr_flags & (PR_STOPPED | PR_ISTOP)))
#else
- if (signal || (pi->prstatus.pr_flags & (PR_STOPPED | PR_ISTOP)))
+ if (signal || (pi->prstatus.pr_flags & (PR_STOPPED | PR_ISTOP)))
#endif
- {
- long cmd;
- struct proc_ctl pctl;
-
- if (signal || !pi->was_stopped ||
- query ("Was stopped when attached, make it runnable again? "))
{
- /* Clear any pending signal if we want to detach without
- a signal. */
- if (signal == 0)
- set_proc_siginfo (pi, signal);
+ long cmd;
+ struct proc_ctl pctl;
+
+ if (signal || !pi->was_stopped ||
+ query ("Was stopped when attached, make it runnable again? "))
+ {
+ /* Clear any pending signal if we want to detach without
+ a signal. */
+ if (signal == 0)
+ set_proc_siginfo (pi, signal);
- /* Clear any fault that might have stopped it. */
+ /* Clear any fault that might have stopped it. */
#ifdef PROCFS_USE_READ_WRITE
- cmd = PCCFAULT;
- if (write (pi->ctl_fd, (char *) &cmd, sizeof (long)) < 0)
+ cmd = PCCFAULT;
+ if (write (pi->ctl_fd, (char *) &cmd, sizeof (long)) < 0)
#else
- if (ioctl (pi->ctl_fd, PIOCCFAULT, 0))
+ if (ioctl (pi->ctl_fd, PIOCCFAULT, 0))
#endif
- {
- print_sys_errmsg (pi->pathname, errno);
- printf_unfiltered ("PIOCCFAULT failed.\n");
- }
+ {
+ print_sys_errmsg (pi->pathname, errno);
+ printf_unfiltered ("PIOCCFAULT failed.\n");
+ }
- /* Make it run again when we close it. */
+ /* Make it run again when we close it. */
- modify_run_on_last_close_flag (pi->ctl_fd, 1);
+ modify_run_on_last_close_flag (pi->ctl_fd, 1);
+ }
}
}
+ close_proc_file (pi);
}
- close_proc_file (pi);
attach_flag = 0;
}
FIXME: Investigate why wait() seems to have problems with programs
being control by /proc routines. */
-
static int
procfs_wait (pid, ourstatus)
int pid;
struct procinfo *pi;
struct proc_ctl pctl;
-#ifndef UNIXWARE
- if (pid != -1) /* Non-specific process? */
- pi = NULL;
- else
- for (pi = procinfo_list; pi; pi = pi->next)
- if (pi->had_event)
- break;
+scan_again:
- if (!pi)
+ /* handle all syscall events first, otherwise we might not
+ notice a thread was created until too late. */
+
+ for (pi = procinfo_list; pi; pi = pi->next)
{
- wait_again:
+ if (!pi->had_event)
+ continue;
- if (pi)
- pi->had_event = 0;
+#ifdef UNIXWARE
+ if (! (pi->prstatus.pr_lwp.pr_flags & (PR_STOPPED | PR_ISTOP)) )
+ continue;
- pi = wait_fd ();
- }
+ why = pi->prstatus.pr_lwp.pr_why;
+ what = pi->prstatus.pr_lwp.pr_what;
+#else
+ if (! (pi->prstatus.pr_flags & (PR_STOPPED | PR_ISTOP)) )
+ continue;
- if (pid != -1)
- for (pi = procinfo_list; pi; pi = pi->next)
- if (pi->pid == pid && pi->had_event)
- break;
+ why = pi->prstatus.pr_why;
+ what = pi->prstatus.pr_what;
#endif
+ if (why == PR_SYSENTRY || why == PR_SYSEXIT)
+ {
+ int i;
+ int found_handler = 0;
+
+ for (i = 0; i < pi->num_syscall_handlers; i++)
+ if (pi->syscall_handlers[i].syscall_num == what)
+ {
+ found_handler = 1;
+ pi->saved_rtnval = pi->pid;
+ pi->saved_statval = 0;
+ if (!pi->syscall_handlers[i].func
+ (pi, what, why, &pi->saved_rtnval, &pi->saved_statval))
+ pi->had_event = 0;
+ break;
+ }
- if (!pi && !checkerr)
- goto wait_again;
+ if (!found_handler)
+ {
+ if (why == PR_SYSENTRY)
+ error ("PR_SYSENTRY, unhandled system call %d", what);
+ else
+ error ("PR_SYSEXIT, unhandled system call %d", what);
+ }
+ }
+ }
+
+ /* find a relevant process with an event */
+
+ for (pi = procinfo_list; pi; pi = pi->next)
+ if (pi->had_event && (pid == -1 || pi->pid == pid))
+ break;
+
+ if (!pi)
+ {
+ wait_fd ();
+ goto scan_again;
+ }
#ifdef UNIXWARE
if (!checkerr && !(pi->prstatus.pr_lwp.pr_flags & (PR_STOPPED | PR_ISTOP)))
{
checkerr++;
}
- }
+ }
if (checkerr)
{
if (errno == ENOENT)
{
+ /* XXX Fixme -- what to do if attached? Can't call wait... */
rtnval = wait (&statval);
- if (rtnval != inferior_pid)
+ if ((rtnval) != (PIDGET (inferior_pid)))
{
print_sys_errmsg (pi->pathname, errno);
- error ("procfs_write_pcwstop, wait failed, returned %d", rtnval);
+ error ("procfs_wait: wait failed, returned %d", rtnval);
/* NOTREACHED */
}
}
/* NOTREACHED */
}
}
+#ifdef UNIXWARE
+ else if (pi->prstatus.pr_lwp.pr_flags & (PR_STOPPED | PR_ISTOP))
+#else
else if (pi->prstatus.pr_flags & (PR_STOPPED | PR_ISTOP))
+#endif
{
#ifdef UNIXWARE
rtnval = pi->prstatus.pr_pid;
break;
case PR_SYSENTRY:
case PR_SYSEXIT:
- {
- int i;
- int found_handler = 0;
-
- for (i = 0; i < pi->num_syscall_handlers; i++)
- if (pi->syscall_handlers[i].syscall_num == what)
- {
- found_handler = 1;
- if (!pi->syscall_handlers[i].func (pi, what, why,
- &rtnval, &statval))
- goto wait_again;
-
- break;
- }
-
- if (!found_handler)
- if (why == PR_SYSENTRY)
- error ("PR_SYSENTRY, unhandled system call %d", what);
- else
- error ("PR_SYSEXIT, unhandled system call %d", what);
- }
+ rtnval = pi->saved_rtnval;
+ statval = pi->saved_statval;
break;
-#ifdef PR_DEAD
- case (short)PR_DEAD:
- {
- int dummy;
-
- /* The inferior process is about to terminate.
- pr_what has the process's exit or return value.
- A PIOCRUN ioctl must be used to restart the process so it
- can finish exiting. */
-
-#ifdef PROCFS_USE_READ_WRITE
- pctl.cmd = PCRUN;
- pctl.data = PRCFAULT;
- if (write (pi->ctl_fd, (char *) &pctl, sizeof (struct proc_ctl)) < 0)
-#else
- pi->prrun.pr_flags = PRCFAULT;
- if (ioctl (pi->ctl_fd, PIOCRUN, &pi->prrun) != 0)
-#endif
- perror_with_name (pi->pathname);
-
- if (wait (&dummy) < 0)
- rtnval = -1;
- statval = pi->prstatus.pr_what;
- }
- break;
-#endif
case PR_REQUESTED:
statval = (SIGSTOP << 8) | 0177;
break;
case FLTBPT:
case FLTTRACE:
statval = (SIGTRAP << 8) | 0177;
- break;
+ break;
case FLTSTACK:
case FLTACCESS:
case FLTBOUNDS:
default:
error ("PIOCWSTOP, unknown why %d, what %d", why, what);
}
-/* Stop all the other threads when any of them stops. */
+ /* Stop all the other threads when any of them stops. */
{
- struct procinfo *procinfo;
+ struct procinfo *procinfo, *next_pi;
- for (procinfo = procinfo_list; procinfo; procinfo = procinfo->next)
+ for (procinfo = procinfo_list; procinfo; procinfo = next_pi)
{
+ next_pi = procinfo->next;
if (!procinfo->had_event)
{
#ifdef PROCFS_USE_READ_WRITE
- cmd = PCSTOP;
+ long cmd = PCSTOP;
if (write (pi->ctl_fd, (char *) &cmd, sizeof (long)) < 0)
{
print_sys_errmsg (procinfo->pathname, errno);
order to avoid the hang. */
if (!procfs_read_status (procinfo))
{
- print_sys_errmsg (procinfo->pathname, errno);
- error ("procfs_read_status failed");
+ /* The LWP has apparently terminated. */
+ if (info_verbose)
+ printf_filtered ("LWP %d doesn't respond.\n",
+ (procinfo->pid >> 16) & 0xffff);
+ close_proc_file (procinfo);
+ continue;
}
if (!(procinfo->prstatus.pr_flags & PR_STOPPED))
- if (ioctl (procinfo->ctl_fd, PIOCSTOP, &procinfo->prstatus) < 0)
+ if (ioctl (procinfo->ctl_fd, PIOCSTOP, &procinfo->prstatus)
+ < 0)
{
print_sys_errmsg (procinfo->pathname, errno);
- error ("PIOCSTOP failed");
+ warning ("PIOCSTOP failed");
}
#endif
}
}
else
{
- error ("PIOCWSTOP, stopped for unknown/unhandled reason, flags %#x",
+ error ("PIOCWSTOP, stopped for unknown/unhandled reason, flags %#x",
+#ifdef UNIXWARE
+ pi->prstatus.pr_lwp.pr_flags);
+#else
pi->prstatus.pr_flags);
+#endif
}
store_waitstatus (ourstatus, statval);
if (rtnval == -1) /* No more children to wait for */
{
- fprintf_unfiltered (gdb_stderr, "Child process unexpectedly missing.\n");
+ warning ("Child process unexpectedly missing");
/* Claim it exited with unknown signal. */
ourstatus->kind = TARGET_WAITKIND_SIGNALLED;
ourstatus->value.sig = TARGET_SIGNAL_UNKNOWN;
enum target_signal signo;
{
int signal_to_pass;
- struct procinfo *pi, *procinfo;
+ struct procinfo *pi, *procinfo, *next_pi;
struct proc_ctl pctl;
pi = find_procinfo (pid == -1 ? inferior_pid : pid, 0);
else if (signo == TARGET_SIGNAL_TSTP
#ifdef UNIXWARE
&& pi->prstatus.pr_lwp.pr_cursig == SIGTSTP
- && pi->prstatus.pr_lwp.pr_action.sa_handler == SIG_DFL)
+ && pi->prstatus.pr_lwp.pr_action.sa_handler == SIG_DFL
#else
&& pi->prstatus.pr_cursig == SIGTSTP
- && pi->prstatus.pr_action.sa_handler == SIG_DFL)
+ && pi->prstatus.pr_action.sa_handler == SIG_DFL
#endif
+ )
/* We are about to pass the inferior a SIGTSTP whose action is
SIG_DFL. The SIG_DFL action for a SIGTSTP is to stop
pi->prrun.pr_flags |= PRSTEP;
#endif
}
-
+ pi->had_event = 0;
/* Don't try to start a process unless it's stopped on an
`event of interest'. Doing so will cause errors. */
+ if (!procfs_read_status (pi))
+ {
+ /* The LWP has apparently terminated. */
+ if (info_verbose)
+ printf_filtered ("LWP %d doesn't respond.\n",
+ (pi->pid >> 16) & 0xffff);
+ close_proc_file (pi);
+ }
+ else
+ {
#ifdef PROCFS_USE_READ_WRITE
- if (write (pi->ctl_fd, (char *) &pctl, sizeof (struct proc_ctl)) < 0)
+ if (write (pi->ctl_fd, (char *) &pctl, sizeof (struct proc_ctl)) < 0)
#else
- if ((pi->prstatus.pr_flags & PR_ISTOP)
- && ioctl (pi->ctl_fd, PIOCRUN, &pi->prrun) != 0)
+ if ((pi->prstatus.pr_flags & PR_ISTOP)
+ && ioctl (pi->ctl_fd, PIOCRUN, &pi->prrun) != 0)
#endif
- {
- perror_with_name (pi->pathname);
- /* NOTREACHED */
+ {
+ /* The LWP has apparently terminated. */
+ if (info_verbose)
+ printf_filtered ("LWP %d doesn't respond.\n",
+ (pi->pid >> 16) & 0xffff);
+ close_proc_file (pi);
+ }
}
- pi->had_event = 0;
-
- /* Continue all the other threads that haven't had an event of
- interest. */
+ /* Continue all the other threads that haven't had an event of interest.
+ Also continue them if they have NOPASS_NEXT_SIGSTOP set; this is only
+ set by do_attach, and means this is the first resume after an attach.
+ All threads were CSTOP'd by do_attach, and should be resumed now. */
if (pid == -1)
- for (procinfo = procinfo_list; procinfo; procinfo = procinfo->next)
+ for (procinfo = procinfo_list; procinfo; procinfo = next_pi)
{
- if (pi != procinfo && !procinfo->had_event)
- {
+ next_pi = procinfo->next;
+ if (pi != procinfo)
+ if (!procinfo->had_event ||
+ (procinfo->nopass_next_sigstop && signo == TARGET_SIGNAL_STOP))
+ {
+ procinfo->had_event = procinfo->nopass_next_sigstop = 0;
#ifdef PROCFS_USE_READ_WRITE
- pctl.data = PRCFAULT | PRCSIG;
- if (write (procinfo->ctl_fd, (char *) &pctl,
- sizeof (struct proc_ctl)) < 0)
- {
- if (!procfs_read_status (procinfo))
- {
- fprintf_unfiltered(gdb_stderr, "procfs_read_status failed, errno=%d\n", errno);
- }
- print_sys_errmsg (procinfo->pathname, errno);
- error ("PCRUN failed");
- }
- procfs_read_status (procinfo);
+ pctl.data = PRCFAULT | PRCSIG;
+ if (write (procinfo->ctl_fd, (char *) &pctl,
+ sizeof (struct proc_ctl)) < 0)
+ {
+ if (!procfs_read_status (procinfo))
+ fprintf_unfiltered(gdb_stderr,
+ "procfs_read_status failed, errno=%d\n",
+ errno);
+ print_sys_errmsg (procinfo->pathname, errno);
+ error ("PCRUN failed");
+ }
#else
- procinfo->prrun.pr_flags &= PRSTEP;
- procinfo->prrun.pr_flags |= PRCFAULT | PRCSIG;
- procfs_read_status (procinfo);
+ procinfo->prrun.pr_flags &= PRSTEP;
+ procinfo->prrun.pr_flags |= PRCFAULT | PRCSIG;
+ if (!procfs_read_status (procinfo))
+ {
+ /* The LWP has apparently terminated. */
+ if (info_verbose)
+ printf_filtered ("LWP %d doesn't respond.\n",
+ (procinfo->pid >> 16) & 0xffff);
+ close_proc_file (procinfo);
+ continue;
+ }
- /* Don't try to start a process unless it's stopped on an
- `event of interest'. Doing so will cause errors. */
+ /* Don't try to start a process unless it's stopped on an
+ `event of interest'. Doing so will cause errors. */
- if ((procinfo->prstatus.pr_flags & PR_ISTOP)
- && ioctl (procinfo->ctl_fd, PIOCRUN, &procinfo->prrun) < 0)
- {
- if (!procfs_read_status (procinfo))
- {
- fprintf_unfiltered(gdb_stderr, "procfs_read_status failed, errno=%d\n", errno);
- }
- print_sys_errmsg (procinfo->pathname, errno);
- error ("PIOCRUN failed");
- }
- procfs_read_status (procinfo);
+ if ((procinfo->prstatus.pr_flags & PR_ISTOP)
+ && ioctl (procinfo->ctl_fd, PIOCRUN, &procinfo->prrun) < 0)
+ {
+ if (!procfs_read_status (procinfo))
+ fprintf_unfiltered(gdb_stderr,
+ "procfs_read_status failed, errno=%d\n",
+ errno);
+ print_sys_errmsg (procinfo->pathname, errno);
+ warning ("PIOCRUN failed");
+ }
#endif
- }
+ }
+ procfs_read_status (procinfo);
}
}
LOCAL FUNCTION
- proc_init_failed - called whenever /proc access initialization
+ proc_init_failed - called when /proc access initialization fails
fails
SYNOPSIS
- static void proc_init_failed (struct procinfo *pi, char *why)
+ static void proc_init_failed (struct procinfo *pi,
+ char *why, int kill_p)
DESCRIPTION
This function is called whenever initialization of access to a /proc
entry fails. It prints a suitable error message, does some cleanup,
and then invokes the standard error processing routine which dumps
- us back into the command loop.
+ us back into the command loop. If KILL_P is true, sends SIGKILL.
*/
static void
-proc_init_failed (pi, why)
+proc_init_failed (pi, why, kill_p)
struct procinfo *pi;
char *why;
+ int kill_p;
{
print_sys_errmsg (pi->pathname, errno);
- kill (pi->pid, SIGKILL);
+ if (kill_p)
+ kill (pi->pid, SIGKILL);
close_proc_file (pi);
error (why);
/* NOTREACHED */
{
struct procinfo *procinfo;
+ delete_thread (pip->pid); /* remove thread from GDB's thread list */
remove_fd (pip); /* Remove fd from poll/select list */
close (pip->ctl_fd);
close (pip->as_fd);
close (pip->map_fd);
return 0;
- }
+ }
}
#else /* HAVE_MULTIPLE_PROC_FDS */
char *args;
int from_tty;
{
- int pid = inferior_pid;
+ int pid;
struct procinfo *pip;
struct cleanup *old_chain;
char **argv;
/* Default to using the current inferior if no pid specified. Note
that inferior_pid may be 0, hence we set okerr. */
- pip = find_procinfo (inferior_pid, 1);
+ pid = inferior_pid & 0x7fffffff; /* strip off sol-thread bit */
+ if (!(pip = find_procinfo (pid, 1))) /* inferior_pid no good? */
+ pip = procinfo_list; /* take first available */
+ pid = pid & 0xffff; /* extract "real" pid */
if (args != NULL)
{
#ifndef PROCFS_USE_READ_WRITE
#ifdef PIOCLWPIDS
nlwp = pip->prstatus.pr_nlwp;
- lwps = alloca ((2 * nlwp + 2) * sizeof (id_t));
+ lwps = alloca ((2 * nlwp + 2) * sizeof (*lwps));
if (ioctl (pip->ctl_fd, PIOCLWPIDS, lwps))
{
print_sys_errmsg (pip -> pathname, errno);
- error ("PIOCLWPIDS failed");
+ error ("PIOCLWPIDS failed");
}
#else /* PIOCLWPIDS */
nlwp = 1;
if (summary || all)
{
info_proc_stop (pip, summary);
+#ifdef UNIXWARE
+ supply_gregset (&pip->prstatus.pr_lwp.pr_context.uc_mcontext.gregs);
+#else
+ supply_gregset (&pip->prstatus.pr_reg);
+#endif
+ printf_filtered ("PC: ");
+ print_address (read_pc (), gdb_stdout);
+ printf_filtered ("\n");
}
if (summary || all || signals || faults)
{
{
sysset_t sysset;
int goterr, i;
-
+
+#ifndef UNIXWARE
goterr = ioctl (pi->ctl_fd, PIOCGENTRY, &sysset) < 0;
if (goterr && !errok)
error ("PIOCSEXIT failed");
}
}
+#endif
if (!pi->syscall_handlers)
{
syscall_func_t *func;
{
sysset_t sysset;
-
+
+#ifndef UNIXWARE
if (flags & PROCFS_SYSCALL_ENTRY)
{
if (ioctl (pi->ctl_fd, PIOCGENTRY, &sysset) < 0)
error ("PIOCSEXIT failed");
}
}
+#endif
if (!pi->syscall_handlers)
{
{
int lwp_id;
struct procinfo *childpi;
+ struct proc_ctl pctl;
/* We've just detected the completion of an lwp_create system call. Now we
need to setup a procinfo struct for this thread, and notify the thread
/* If lwp_create failed, then nothing interesting happened. Continue the
process and go back to sleep. */
- if (pi->prstatus.pr_reg[R_PSR] & PS_FLAG_CARRY)
+#ifdef UNIXWARE
+ /* Joel ... can you check this logic out please? JKJ */
+ if (pi->prstatus.pr_lwp.pr_context.uc_mcontext.gregs[R_EFL] & 1)
+ { /* _lwp_create failed */
+ pctl.cmd = PCRUN;
+ pctl.data = PRCFAULT;
+
+ if (write (pi->ctl_fd, (char *) &pctl, sizeof (struct proc_ctl)) < 0)
+ perror_with_name (pi->pathname);
+
+ return 0;
+ }
+#else /* UNIXWARE */
+ if (PROCFS_GET_CARRY (pi->prstatus.pr_reg))
{ /* _lwp_create failed */
pi->prrun.pr_flags &= PRSTEP;
pi->prrun.pr_flags |= PRCFAULT;
return 0;
}
+#endif
/* At this point, the new thread is stopped at it's first instruction, and
the parent is stopped at the exit from lwp_create. */
if (pi->new_child) /* Child? */
{ /* Yes, just continue it */
+#ifdef UNIXWARE
+ pctl.cmd = PCRUN;
+ pctl.data = PRCFAULT;
+
+ if (write(pi->ctl_fd, (char *)&pctl, sizeof (struct proc_ctl)) < 0)
+#else /* !UNIXWARE */
pi->prrun.pr_flags &= PRSTEP;
pi->prrun.pr_flags |= PRCFAULT;
if ((pi->prstatus.pr_flags & PR_ISTOP)
&& ioctl (pi->ctl_fd, PIOCRUN, &pi->prrun) != 0)
+#endif /* !UNIXWARE */
perror_with_name (pi->pathname);
pi->new_child = 0; /* No longer new */
/* We're the proud parent of a new thread. Setup an exit trap for lwp_create
in the child and continue the parent. */
-
+
/* Third arg is pointer to new thread id. */
+#ifdef UNIXWARE
+ lwp_id = read_memory_integer (pi->prstatus.pr_lwp.pr_sysarg[2], sizeof (int));
+#else
lwp_id = read_memory_integer (pi->prstatus.pr_sysarg[2], sizeof (int));
+#endif
lwp_id = (lwp_id << 16) | PIDGET (pi->pid);
childpi = create_procinfo (lwp_id);
/* The new process has actually inherited the lwp_create syscall trap from
- it's parent, but we still have to call this to register a handler for
+ it's parent, but we still have to call this to register handlers for
that child. */
- procfs_set_syscall_trap (childpi, SYS_lwp_create, PROCFS_SYSCALL_EXIT,
- procfs_lwp_creation_handler);
+ procfs_set_inferior_syscall_traps (childpi);
+ add_thread (lwp_id);
+ printf_filtered ("[New %s]\n", target_pid_to_str (lwp_id));
- childpi->new_child = 1; /* Flag this as an unseen child process */
+ /* Continue the parent */
+#ifdef UNIXWARE
+ pctl.cmd = PCRUN;
+ pctl.data = PRCFAULT;
- *rtnvalp = lwp_id; /* the new arrival. */
- *statvalp = (SIGTRAP << 8) | 0177;
+ if (write(pi->ctl_fd, (char *)&pctl, sizeof (struct proc_ctl)) < 0)
+#else
+ pi->prrun.pr_flags &= PRSTEP;
+ pi->prrun.pr_flags |= PRCFAULT;
+ if (ioctl (pi->ctl_fd, PIOCRUN, &pi->prrun) != 0)
+#endif
+ perror_with_name (pi->pathname);
- return 1;
+ /* The new child may have been created in one of two states:
+ SUSPENDED or RUNNABLE. If runnable, we will simply signal it to run.
+ If suspended, we flag it to be continued later, when it has an event. */
+
+#ifdef UNIXWARE
+ if (childpi->prstatus.pr_lwp.pr_why == PR_SUSPENDED)
+#else
+ if (childpi->prstatus.pr_why == PR_SUSPENDED)
+#endif
+ childpi->new_child = 1; /* Flag this as an unseen child process */
+ else
+ {
+ /* Continue the child */
+#ifdef UNIXWARE
+ pctl.cmd = PCRUN;
+ pctl.data = PRCFAULT;
+
+ if (write(pi->ctl_fd, (char *)&pctl, sizeof (struct proc_ctl)) < 0)
+#else
+ childpi->prrun.pr_flags &= PRSTEP;
+ childpi->prrun.pr_flags |= PRCFAULT;
+
+ if (ioctl (childpi->ctl_fd, PIOCRUN, &childpi->prrun) != 0)
+#endif
+ perror_with_name (childpi->pathname);
+ }
+ return 0;
}
#endif /* SYS_lwp_create */
}
fork_inferior (exec_file, allargs, env,
- proc_set_exec_trap, procfs_init_inferior, shell_file);
+ proc_set_exec_trap, procfs_init_inferior, NULL, shell_file);
/* We are at the first instruction we care about. */
/* Pedal to the metal... */
return !procfs_suppress_run;
}
#ifdef TARGET_HAS_HARDWARE_WATCHPOINTS
+#ifndef UNIXWARE
\f
/* Insert a watchpoint */
int
}
return 0;
}
+#endif /* !UNIXWARE */
#endif /* TARGET_HAS_HARDWARE_WATCHPOINTS */
/* Why is this necessary? Shouldn't dead threads just be removed from the
procfs_thread_alive (pid)
int pid;
{
- return 1;
+ struct procinfo *pi, *next_pi;
+
+ for (pi = procinfo_list; pi; pi = next_pi)
+ {
+ next_pi = pi->next;
+ if (pi -> pid == pid)
+ if (procfs_read_status (pi)) /* alive */
+ return 1;
+ else /* defunct (exited) */
+ {
+ close_proc_file (pi);
+ return 0;
+ }
+ }
+ return 0;
+}
+
+int
+procfs_first_available ()
+{
+ struct procinfo *pi;
+
+ for (pi = procinfo_list; pi; pi = pi->next)
+ {
+ if (procfs_read_status (pi))
+ return pi->pid;
+ }
+ return -1;
+}
+
+int
+procfs_get_pid_fd (pid)
+ int pid;
+{
+ struct procinfo *pi = find_procinfo (pid, 1);
+
+ if (pi == NULL)
+ return -1;
+
+ return pi->ctl_fd;
}
/* Send a SIGINT to the process group. This acts just like the user typed a
"Unix /proc child process (started by the \"run\" command).", /* to_doc */
procfs_open, /* to_open */
0, /* to_close */
- procfs_attach, /* to_attach */
+ procfs_attach, /* to_attach */
+ NULL, /* to_post_attach */
+ procfs_attach, /* to_require_attach */
procfs_detach, /* to_detach */
- procfs_resume, /* to_resume */
+ procfs_detach, /* to_require_detach */
+ procfs_resume, /* to_resume */
procfs_wait, /* to_wait */
+ NULL, /* to_post_wait */
procfs_fetch_registers, /* to_fetch_registers */
procfs_store_registers, /* to_store_registers */
procfs_prepare_to_store, /* to_prepare_to_store */
0, /* to_load */
0, /* to_lookup_symbol */
procfs_create_inferior, /* to_create_inferior */
+ NULL, /* to_post_startup_inferior */
+ NULL, /* to_acknowledge_created_inferior */
+ NULL, /* to_clone_and_follow_inferior */
+ NULL, /* to_post_follow_inferior_by_clone */
+ NULL, /* to_insert_fork_catchpoint */
+ NULL, /* to_remove_fork_catchpoint */
+ NULL, /* to_insert_vfork_catchpoint */
+ NULL, /* to_remove_vfork_catchpoint */
+ NULL, /* to_has_forked */
+ NULL, /* to_has_vforked */
+ NULL, /* to_can_follow_vfork_prior_to_exec */
+ NULL, /* to_post_follow_vfork */
+ NULL, /* to_insert_exec_catchpoint */
+ NULL, /* to_remove_exec_catchpoint */
+ NULL, /* to_has_execd */
+ NULL, /* to_reported_exec_events_per_exec_call */
+ NULL, /* to_has_syscall_event */
+ NULL, /* to_has_exited */
procfs_mourn_inferior, /* to_mourn_inferior */
procfs_can_run, /* to_can_run */
procfs_notice_signals, /* to_notice_signals */
procfs_thread_alive, /* to_thread_alive */
procfs_stop, /* to_stop */
+ NULL, /* to_enable_exception_callback */
+ NULL, /* to_get_current_exception_event */
+ NULL, /* to_pid_to_exec_file */
+ NULL, /* to_core_file_to_sym_file */
process_stratum, /* to_stratum */
0, /* to_next */
1, /* to_has_all_memory */
add_target (&procfs_ops);
- add_info ("proc", info_proc,
+ add_info ("processes", info_proc,
"Show process status information using /proc entry.\n\
Specify process id or use current inferior by default.\n\
Specify keywords for detailed information; default is summary.\n\
projects / deliverable / binutils-gdb.git / blobdiff