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
71 lines
1.3 KiB
C
Executable File
71 lines
1.3 KiB
C
Executable File
#include <lib.h>
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/* System processes use simpler macros with no range error checking (defined in
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* signal.h). The ANSI signal() implementation now also uses the macro
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* versions, which makes hiding of the functions here a historical remains.
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*/
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#define sigaddset _sigaddset
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#define sigdelset _sigdelset
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#define sigemptyset _sigemptyset
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#define sigfillset _sigfillset
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#define sigismember _sigismember
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#include <signal.h>
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/* Low bit of signal masks. */
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#define SIGBIT_0 ((sigset_t) 1)
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/* Mask of valid signals (0 - _NSIG). */
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#define SIGMASK (((SIGBIT_0 << _NSIG) << 1) - 1)
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#define sigisvalid(signo) ((unsigned) (signo) <= _NSIG)
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PUBLIC int sigaddset(set, signo)
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sigset_t *set;
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int signo;
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{
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if (!sigisvalid(signo)) {
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errno = EINVAL;
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return -1;
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}
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*set |= SIGBIT_0 << signo;
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return 0;
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}
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PUBLIC int sigdelset(set, signo)
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sigset_t *set;
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int signo;
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{
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if (!sigisvalid(signo)) {
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errno = EINVAL;
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return -1;
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}
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*set &= ~(SIGBIT_0 << signo);
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return 0;
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}
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PUBLIC int sigemptyset(set)
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sigset_t *set;
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{
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*set = 0;
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return 0;
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}
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PUBLIC int sigfillset(set)
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sigset_t *set;
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{
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*set = SIGMASK;
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return 0;
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}
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PUBLIC int sigismember(set, signo)
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_CONST sigset_t *set;
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int signo;
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{
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if (!sigisvalid(signo)) {
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errno = EINVAL;
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return -1;
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}
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if (*set & (SIGBIT_0 << signo))
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return 1;
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return 0;
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}
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