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#!/usr/sbin/dtrace -s
/*
* Copyright (c) 2012-2013 Apple Inc. All rights reserved.
*
* @APPLE_APACHE_LICENSE_HEADER_START@
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* @APPLE_APACHE_LICENSE_HEADER_END@
*/
/*
* Usage: dispatch_timers.d -p [pid]
* traced process must have been executed with
* DYLD_LIBRARY_PATH=/usr/lib/system/introspection or with
* DYLD_IMAGE_SUFFIX=_profile or DYLD_IMAGE_SUFFIX=_debug
*/
#pragma D option quiet
#pragma D option zdefs
typedef struct dispatch_trace_timer_params_s {
int64_t deadline, interval, leeway;
} *dispatch_trace_timer_params_t;
dispatch$target:libdispatch*.dylib::timer-configure,
dispatch$target:libdispatch*.dylib::timer-program,
dispatch$target:libdispatch*.dylib::timer-wake,
dispatch$target:libdispatch*.dylib::timer-fire /!start/ {
start = walltimestamp;
}
/*
* Trace dispatch timer configuration and programming:
* Timer configuration indicates that dispatch_source_set_timer() was called.
* Timer programming indicates that the dispatch manager is about to sleep
* for 'deadline' ns (but may wake up earlier if non-timer events occur).
* Time parameters are in nanoseconds, a value of -1 means "forever".
*
* probe timer-configure/-program(dispatch_source_t source,
* dispatch_function_t function, dispatch_trace_timer_params_t params)
*/
dispatch$target:libdispatch*.dylib::timer-configure,
dispatch$target:libdispatch*.dylib::timer-program {
this->p = (dispatch_trace_timer_params_t)copyin(arg2,
sizeof(struct dispatch_trace_timer_params_s));
printf("%8dus %-15s: 0x%0?p deadline: %11dns interval: %11dns leeway: %11dns",
(walltimestamp-start)/1000, probename, arg0,
this->p ? this->p->deadline : 0, this->p ? this->p->interval : 0,
this->p ? this->p->leeway : 0);
usym(arg1);
printf("\n");
}
dispatch$target:libdispatch*.dylib::timer-configure {
printf(" / --- Begin ustack");
ustack();
printf(" \ --- End ustack\n");
}
/*
* Trace dispatch timer wakes and fires:
* Timer wakes indicate that the dispatch manager woke up due to expiry of the
* deadline for the specified timer.
* Timer fires indicate that that the dispatch manager scheduled the event
* handler of the specified timer for asynchronous execution (may occur without
* a corresponding timer wake if the manager was awake processing other events
* when the timer deadline expired).
*
* probe timer-wake/-fire(dispatch_source_t source,
* dispatch_function_t function)
*/
dispatch$target:libdispatch*.dylib::timer-wake,
dispatch$target:libdispatch*.dylib::timer-fire {
printf("%8dus %-15s: 0x%0?p%-70s", (walltimestamp-start)/1000, probename,
arg0, "");
usym(arg1);
printf("\n");
}
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