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prototype.c
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Editing: prototype.c
/* * This file is freeware. You are free to use it and add your own * license. * * $FreeBSD$ * */ #include <sys/cdefs.h> #include <sys/param.h> #include <sys/systm.h> #include <sys/conf.h> #include <sys/kernel.h> #include <sys/module.h> #include <sys/dtrace.h> static d_open_t prototype_open; static int prototype_unload(void); static void prototype_getargdesc(void *, dtrace_id_t, void *, dtrace_argdesc_t *); static void prototype_provide(void *, dtrace_probedesc_t *); static void prototype_destroy(void *, dtrace_id_t, void *); static void prototype_enable(void *, dtrace_id_t, void *); static void prototype_disable(void *, dtrace_id_t, void *); static void prototype_load(void *); static struct cdevsw prototype_cdevsw = { .d_version = D_VERSION, .d_open = prototype_open, .d_name = "prototype", }; static dtrace_pattr_t prototype_attr = { { DTRACE_STABILITY_EVOLVING, DTRACE_STABILITY_EVOLVING, DTRACE_CLASS_COMMON }, { DTRACE_STABILITY_PRIVATE, DTRACE_STABILITY_PRIVATE, DTRACE_CLASS_UNKNOWN }, { DTRACE_STABILITY_PRIVATE, DTRACE_STABILITY_PRIVATE, DTRACE_CLASS_ISA }, { DTRACE_STABILITY_EVOLVING, DTRACE_STABILITY_EVOLVING, DTRACE_CLASS_COMMON }, { DTRACE_STABILITY_PRIVATE, DTRACE_STABILITY_PRIVATE, DTRACE_CLASS_ISA }, }; static dtrace_pops_t prototype_pops = { .dtps_provide = prototype_provide, .dtps_provide_module = NULL, .dtps_enable = prototype_enable, .dtps_disable = prototype_disable, .dtps_suspend = NULL, .dtps_resume = NULL, .dtps_getargdesc = prototype_getargdesc, .dtps_getargval = NULL, .dtps_usermode = NULL, .dtps_destroy = prototype_destroy }; static struct cdev *prototype_cdev; static dtrace_provider_id_t prototype_id; static void prototype_getargdesc(void *arg, dtrace_id_t id, void *parg, dtrace_argdesc_t *desc) { } static void prototype_provide(void *arg, dtrace_probedesc_t *desc) { } static void prototype_destroy(void *arg, dtrace_id_t id, void *parg) { } static void prototype_enable(void *arg, dtrace_id_t id, void *parg) { } static void prototype_disable(void *arg, dtrace_id_t id, void *parg) { } static void prototype_load(void *dummy) { /* Create the /dev/dtrace/prototype entry. */ prototype_cdev = make_dev(&prototype_cdevsw, 0, UID_ROOT, GID_WHEEL, 0600, "dtrace/prototype"); if (dtrace_register("prototype", &prototype_attr, DTRACE_PRIV_USER, NULL, &prototype_pops, NULL, &prototype_id) != 0) return; } static int prototype_unload() { int error = 0; if ((error = dtrace_unregister(prototype_id)) != 0) return (error); destroy_dev(prototype_cdev); return (error); } static int prototype_modevent(module_t mod __unused, int type, void *data __unused) { int error = 0; switch (type) { case MOD_LOAD: break; case MOD_UNLOAD: break; case MOD_SHUTDOWN: break; default: error = EOPNOTSUPP; break; } return (error); } static int prototype_open(struct cdev *dev __unused, int oflags __unused, int devtype __unused, struct thread *td __unused) { return (0); } SYSINIT(prototype_load, SI_SUB_DTRACE_PROVIDER, SI_ORDER_ANY, prototype_load, NULL); SYSUNINIT(prototype_unload, SI_SUB_DTRACE_PROVIDER, SI_ORDER_ANY, prototype_unload, NULL); DEV_MODULE(prototype, prototype_modevent, NULL); MODULE_VERSION(prototype, 1); MODULE_DEPEND(prototype, dtrace, 1, 1, 1); MODULE_DEPEND(prototype, opensolaris, 1, 1, 1);
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