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Unbreak profiling with CPUPROFILE_FREQUENCY=1

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This closes ticket #777.

No test sadly, since it's not trivial to unittest this case. But
fix with single-shot manual testing is better than nothing.
This commit is contained in:
Aliaksey Kandratsenka 2016-03-12 10:54:05 -08:00
parent 6ff86ff6a7
commit 6682016092
1 changed files with 4 additions and 2 deletions
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6
src/profile-handler.cc
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@ -492,8 +492,10 @@ void ProfileHandler::UpdateTimer(bool enable) {
timer_running_ = enable;
struct itimerval timer;
timer.it_interval.tv_sec = 0;
timer.it_interval.tv_usec = (enable ? (1000000 / frequency_) : 0);
static const int kMillion = 1000000;
int interval_usec = enable ? kMillion / frequency_ : 0;
timer.it_interval.tv_sec = interval_usec / kMillion;
timer.it_interval.tv_usec = interval_usec % kMillion;
timer.it_value = timer.it_interval;
setitimer(timer_type_, &timer, 0);
}