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