b423d7b477
o Support for ptrace T_ATTACH/T_DETACH and T_SYSCALL o PM signal handling logic should now work properly, even with debuggers being present o Asynchronous PM/VFS protocol, full IPC support for senda(), and AMF_NOREPLY senda() flag DETAILS Process stop and delay call handling of PM: o Added sys_runctl() kernel call with sys_stop() and sys_resume() aliases, for PM to stop and resume a process o Added exception for sending/syscall-traced processes to sys_runctl(), and matching SIGKREADY pseudo-signal to PM o Fixed PM signal logic to deal with requests from a process after stopping it (so-called "delay calls"), using the SIGKREADY facility o Fixed various PM panics due to race conditions with delay calls versus VFS calls o Removed special PRIO_STOP priority value o Added SYS_LOCK RTS kernel flag, to stop an individual process from running while modifying its process structure Signal and debugger handling in PM: o Fixed debugger signals being dropped if a second signal arrives when the debugger has not retrieved the first one o Fixed debugger signals being sent to the debugger more than once o Fixed debugger signals unpausing process in VFS; removed PM_UNPAUSE_TR protocol message o Detached debugger signals from general signal logic and from being blocked on VFS calls, meaning that even VFS can now be traced o Fixed debugger being unable to receive more than one pending signal in one process stop o Fixed signal delivery being delayed needlessly when multiple signals are pending o Fixed wait test for tracer, which was returning for children that were not waited for o Removed second parallel pending call from PM to VFS for any process o Fixed process becoming runnable between exec() and debugger trap o Added support for notifying the debugger before the parent when a debugged child exits o Fixed debugger death causing child to remain stopped forever o Fixed consistently incorrect use of _NSIG Extensions to ptrace(): o Added T_ATTACH and T_DETACH ptrace request, to attach and detach a debugger to and from a process o Added T_SYSCALL ptrace request, to trace system calls o Added T_SETOPT ptrace request, to set trace options o Added TO_TRACEFORK trace option, to attach automatically to children of a traced process o Added TO_ALTEXEC trace option, to send SIGSTOP instead of SIGTRAP upon a successful exec() of the tracee o Extended T_GETUSER ptrace support to allow retrieving a process's priv structure o Removed T_STOP ptrace request again, as it does not help implementing debuggers properly o Added MINIX3-specific ptrace test (test42) o Added proper manual page for ptrace(2) Asynchronous PM/VFS interface: o Fixed asynchronous messages not being checked when receive() is called with an endpoint other than ANY o Added AMF_NOREPLY senda() flag, preventing such messages from satisfying the receive part of a sendrec() o Added asynsend3() that takes optional flags; asynsend() is now a #define passing in 0 as third parameter o Made PM/VFS protocol asynchronous; reintroduced tell_fs() o Made PM_BASE request/reply number range unique o Hacked in a horrible temporary workaround into RS to deal with newly revealed RS-PM-VFS race condition triangle until VFS is asynchronous System signal handling: o Fixed shutdown logic of device drivers; removed old SIGKSTOP signal o Removed is-superuser check from PM's do_procstat() (aka getsigset()) o Added sigset macros to allow system processes to deal with the full signal set, rather than just the POSIX subset Miscellaneous PM fixes: o Split do_getset into do_get and do_set, merging common code and making structure clearer o Fixed setpriority() being able to put to sleep processes using an invalid parameter, or revive zombie processes o Made find_proc() global; removed obsolete proc_from_pid() o Cleanup here and there Also included: o Fixed false-positive boot order kernel warning o Removed last traces of old NOTIFY_FROM code THINGS OF POSSIBLE INTEREST o It should now be possible to run PM at any priority, even lower than user processes o No assumptions are made about communication speed between PM and VFS, although communication must be FIFO o A debugger will now receive incoming debuggee signals at kill time only; the process may not yet be fully stopped o A first step has been made towards making the SYSTEM task preemptible
103 lines
3 KiB
C
103 lines
3 KiB
C
/* This file contains procedures to dump to PM' data structures.
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*
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* The entry points into this file are
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* mproc_dmp: display PM process table
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*
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* Created:
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* May 11, 2005: by Jorrit N. Herder
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*/
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#include "inc.h"
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#include "../pm/mproc.h"
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#include <timers.h>
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#include <minix/config.h>
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#include <minix/type.h>
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PUBLIC struct mproc mproc[NR_PROCS];
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/*===========================================================================*
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* mproc_dmp *
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*===========================================================================*/
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PRIVATE char *flags_str(int flags)
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{
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static char str[14];
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str[0] = (flags & WAITING) ? 'W' : '-';
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str[1] = (flags & ZOMBIE) ? 'Z' : '-';
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str[2] = (flags & PAUSED) ? 'P' : '-';
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str[3] = (flags & ALARM_ON) ? 'A' : '-';
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str[4] = (flags & EXITING) ? 'E' : '-';
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str[5] = (flags & STOPPED) ? 'S' : '-';
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str[6] = (flags & SIGSUSPENDED) ? 'U' : '-';
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str[7] = (flags & REPLY) ? 'R' : '-';
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str[8] = (flags & FS_CALL) ? 'F' : '-';
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str[9] = (flags & PM_SIG_PENDING) ? 's' : '-';
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str[10] = (flags & PRIV_PROC) ? 'p' : '-';
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str[11] = (flags & PARTIAL_EXEC) ? 'x' : '-';
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str[12] = (flags & DELAY_CALL) ? 'd' : '-';
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str[13] = '\0';
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return str;
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}
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PUBLIC void mproc_dmp()
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{
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struct mproc *mp;
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int i, n=0;
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static int prev_i = 0;
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printf("Process manager (PM) process table dump\n");
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getsysinfo(PM_PROC_NR, SI_PROC_TAB, mproc);
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printf("-process- -nr-pnr-tnr- --pid--ppid--pgrp- -uid-- -gid-- -nice- -flags-------\n");
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for (i=prev_i; i<NR_PROCS; i++) {
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mp = &mproc[i];
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if (mp->mp_pid == 0 && i != PM_PROC_NR) continue;
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if (++n > 22) break;
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printf("%8.8s %4d%4d%4d %5d %5d %5d ",
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mp->mp_name, i, mp->mp_parent, mp->mp_tracer, mp->mp_pid, mproc[mp->mp_parent].mp_pid, mp->mp_procgrp);
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printf("%2d(%2d) %2d(%2d) ",
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mp->mp_realuid, mp->mp_effuid, mp->mp_realgid, mp->mp_effgid);
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printf(" %3d %s ",
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mp->mp_nice, flags_str(mp->mp_flags));
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printf("\n");
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}
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if (i >= NR_PROCS) i = 0;
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else printf("--more--\r");
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prev_i = i;
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}
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/*===========================================================================*
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* sigaction_dmp *
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*===========================================================================*/
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PUBLIC void sigaction_dmp()
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{
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struct mproc *mp;
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int i, n=0;
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static int prev_i = 0;
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clock_t uptime;
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printf("Process manager (PM) signal action dump\n");
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getsysinfo(PM_PROC_NR, SI_PROC_TAB, mproc);
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getuptime(&uptime);
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printf("-process- -nr- --ignore- --catch- --block- -tomess-- -pending-- -alarm---\n");
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for (i=prev_i; i<NR_PROCS; i++) {
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mp = &mproc[i];
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if (mp->mp_pid == 0 && i != PM_PROC_NR) continue;
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if (++n > 22) break;
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printf("%8.8s %3d ", mp->mp_name, i);
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printf(" 0x%06x 0x%06x 0x%06x 0x%06x ",
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mp->mp_ignore, mp->mp_catch, mp->mp_sigmask, mp->mp_sig2mess);
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printf("0x%06x ", mp->mp_sigpending);
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if (mp->mp_flags & ALARM_ON) printf("%8u", mp->mp_timer.tmr_exp_time-uptime);
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else printf(" -");
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printf("\n");
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}
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if (i >= NR_PROCS) i = 0;
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else printf("--more--\r");
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prev_i = i;
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}
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