site_archiver@lists.apple.com Delivered-To: darwin-dev@lists.apple.com Domainkey-signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=gmail.com; h=received:message-id:date:from:to:subject:mime-version:content-type:content-transfer-encoding:content-disposition; b=VJ2ftrnZ9ig0kRv950NVNBTZEAzu2aqHgsA2KWlipHYa9IWLANvOkzxOty7DSCX1y+V8ElyngWlD6r+RcFJUMH/ehgHvXzVH8AsMODbZNCJeM8gYYdiwZIDcgZCHlK52gP+TvuQUvRLwp93RWqg1R6M9dlhrB/XHc6f3oJr2oeo= While it definitely wasn't my goal to find a way to panic my machine, I've done so anyway. I'm wanting to use kqueue/kevent to track fork() activity. I've taken my code and stripped it down to the minimum necessary to cause a panic. If I replace NOTE_TRACK with any other set of NOTE_* values, the program will work fine. Using NOTE_TRACK by itself or with any other NOTE_* values causes the panic. I've been crashing a Mac mini core duo, fyi. I've been running the program like this: # ./kevent & # ls which causes bash to fork, which ultimately causes the panic. gdb shows the following stacktrace: #0 Debugger (message=0x3c9540 "panic") at /SourceCache/xnu/xnu-792.13.8/osfmk/i386/AT386/model_dep.c:770 #1 0x00128d1f in panic (str=0x3cf1f4 "Unresolved kernel trap (CPU %d, Type %d=%s), registers:\nCR0: 0x%08x, CR2: 0x%08x, CR3: 0x%08x, CR4: 0x%08x\nEAX: 0x%08x, EBX: 0x%08x, ECX: 0x%08x, EDX: 0x%08x\nCR2: 0x%08x, EBP: 0x%08x, ESI: 0x%08x, EDI"...) at /SourceCache/xnu/xnu-792.13.8/osfmk/kern/debug.c:202 #2 0x001a3135 in kernel_trap (state=0xb733e30) at /SourceCache/xnu/xnu-792.13.8/osfmk/i386/trap.c:630 #3 0x0019a8d4 in trap_from_kernel () #4 0x003334f0 in kevent_register (kq=0x20c8c64, kev=0xb733ee8, p=0x0) at /SourceCache/xnu/xnu-792.13.8/bsd/kern/kern_event.c:1187 #5 0x00333a76 in filt_proc (kn=0x20c9dc8, hint=1073742038) at /SourceCache/xnu/xnu-792.13.8/bsd/kern/kern_event.c:520 #6 0x00332bd7 in knote (list=0x25ddb6c, hint=1073742038) at /SourceCache/xnu/xnu-792.13.8/bsd/kern/kern_event.c:1762 #7 0x0033a652 in fork (p=0x25dd9c4, uap=0x2634158, retval=0x263419c) at /SourceCache/xnu/xnu-792.13.8/bsd/kern/kern_fork.c:364 #8 0x00378337 in unix_syscall (state=0x26654cc) at /SourceCache/xnu/xnu-792.13.8/bsd/dev/i386/systemcalls.c:196 #9 0x0019acae in lo_unix_scall () I just wanted to run this by anyone who might have helpful input before I post a bug report. -- Curtis Jones curtis.jones@gmail.com #import <stdio.h> #import <stdlib.h> #import <sys/fcntl.h> #import <sys/event.h> #import <sys/types.h> #import <sys/time.h> #import <unistd.h> int main (int argc, char *argv[]) { int kqfd = 0; if (0 > (kqfd = kqueue())) { printf("%s().. failed to kqueue\n", __PRETTY_FUNCTION__); return EXIT_FAILURE; } printf("%s().. kqueue success, kqfd = %d\n", __PRETTY_FUNCTION__, kqfd); { int pid = getppid(); struct kevent kev; EV_SET(&kev, pid, EVFILT_PROC, EV_ADD, NOTE_TRACK, 0, NULL); if (0 != kevent(kqfd, &kev, 1, NULL, 0, NULL)) { printf("%s().. failed to kevent for pid = %d\n", __PRETTY_FUNCTION__, pid); return EXIT_FAILURE; } printf("%s().. kevent success for pid = %d\n", __PRETTY_FUNCTION__, pid); } while (1) sleep(1); close(kqfd); return EXIT_SUCCESS; } _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.appl... This email sent to site_archiver@lists.apple.com