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* procfs.c: Handle process exits more elegantly by trapping on

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entry to _exit.  Also, cleanup procinfo list when process dies of
it's own accord (as opposed to being killed).
This commit is contained in:
Stu Grossman 1993-10-17 09:12:58 +00:00
parent 18122d8bd3
commit fb63d460a7
2 changed files with 36 additions and 6 deletions
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6
gdb/ChangeLog
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@ -1,3 +1,9 @@
Sun Oct 17 02:06:01 1993 Stu Grossman (grossman at cygnus.com)
* procfs.c: Handle process exits more elegantly by trapping on
entry to _exit. Also, cleanup procinfo list when process dies of
it's own accord (as opposed to being killed).
Sat Oct 16 20:47:30 1993 Jim Kingdon (kingdon@lioth.cygnus.com)
* config/m88k/xm-dgux.h: Define NO_PTRACE_H.

34
gdb/procfs.c
View file

@ -581,6 +581,7 @@ wait_fd ()
print_sys_errmsg (pi->pathname, errno);
error ("PIOCWSTOP failed");
}
pi->had_event = 1;
#endif
if (attach_flag)
@ -1258,11 +1259,6 @@ NOTES
static void
procfs_kill_inferior ()
{
struct procinfo *pi;
for (pi = procinfo_list; pi; pi = pi->next)
unconditionally_kill_inferior (pi);
target_mourn_inferior ();
}
@ -1617,6 +1613,7 @@ static void
proc_set_exec_trap ()
{
sysset_t exitset;
sysset_t entryset;
auto char procname[32];
int fd;
@ -1628,6 +1625,7 @@ proc_set_exec_trap ()
_exit (127);
}
premptyset (&exitset);
premptyset (&entryset);
/* GW: Rationale...
Not all systems with /proc have all the exec* syscalls with the same
@ -1651,6 +1649,15 @@ proc_set_exec_trap ()
_exit (127);
}
praddset (&entryset, SYS_exit);
if (ioctl (fd, PIOCSENTRY, &entryset) < 0)
{
perror (procname);
fflush (stderr);
_exit (126);
}
/* Turn off inherit-on-fork flag so that all grand-children of gdb
start with tracing flags cleared. */
@ -2272,6 +2279,18 @@ wait_again:
{
case PR_SIGNALLED:
statval = (what << 8) | 0177;
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)
@ -3461,6 +3480,11 @@ procfs_create_inferior (exec_file, allargs, env)
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 ();
}