cpython/Lib/test/dtracedata/gc.stp

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global tracing
probe process.mark("function__entry")
{
funcname = user_string($arg2);
if (funcname == "start") {
tracing = 1;
}
}
probe process.mark("gc__start"), process.mark("gc__done")
{
if (tracing) {
printf("%d\t%s:%ld\n", gettimeofday_us(), $$name, $arg1);
}
}
probe process.mark("function__return")
{
funcname = user_string($arg2);
if (funcname == "start") {
tracing = 0;
}
}