Module: StackProf

Defined in:
lib/stackprof/report.rb,
lib/stackprof/middleware.rb,
ext/stackprof.c

Defined Under Namespace

Classes: Middleware, Report

Class Method Summary collapse

Class Method Details

.results ⇒ Object 



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# File 'ext/stackprof.c', line 209

static VALUE
stackprof_results(VALUE self)
{
    VALUE results, frames;

    if (!_stackprof.frames || _stackprof.running)
	return Qnil;

    results = rb_hash_new();
    rb_hash_aset(results, sym_version, DBL2NUM(1.1));
    rb_hash_aset(results, sym_mode, _stackprof.mode);
    rb_hash_aset(results, sym_interval, _stackprof.interval);
    rb_hash_aset(results, sym_samples, SIZET2NUM(_stackprof.overall_samples));
    rb_hash_aset(results, sym_gc_samples, SIZET2NUM(_stackprof.during_gc));
    rb_hash_aset(results, sym_missed_samples, SIZET2NUM(_stackprof.overall_signals - _stackprof.overall_samples));

    frames = rb_hash_new();
    rb_hash_aset(results, sym_frames, frames);
    st_foreach(_stackprof.frames, frame_i, (st_data_t)frames);

    st_free_table(_stackprof.frames);
    _stackprof.frames = NULL;

    return results;
}

.run(*args) ⇒ Object 



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# File 'ext/stackprof.c', line 235

static VALUE
stackprof_run(int argc, VALUE *argv, VALUE self)
{
    rb_need_block();
    stackprof_start(argc, argv, self);
    rb_ensure(rb_yield, Qundef, stackprof_stop, self);
    return stackprof_results(self);
}

.running? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'ext/stackprof.c', line 244

static VALUE
stackprof_running_p(VALUE self)
{
    return _stackprof.running ? Qtrue : Qfalse;
}

.sample ⇒ Object 



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# File 'ext/stackprof.c', line 353

static VALUE
stackprof_sample(VALUE self)
{
    if (!_stackprof.running)
	return Qfalse;

    _stackprof.overall_signals++;
    stackprof_job_handler(0);
    return Qtrue;
}

.start(*args) ⇒ Object 



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# File 'ext/stackprof.c', line 55

static VALUE
stackprof_start(int argc, VALUE *argv, VALUE self)
{
    struct sigaction sa;
    struct itimerval timer;
    VALUE opts = Qnil, mode = Qnil, interval = Qnil;

    if (_stackprof.running)
	return Qfalse;

    rb_scan_args(argc, argv, "0:", &opts);

    if (RTEST(opts)) {
	mode = rb_hash_aref(opts, sym_mode);
	interval = rb_hash_aref(opts, sym_interval);
    }
    if (!RTEST(mode)) mode = sym_wall;

    if (!_stackprof.frames) {
	_stackprof.frames = st_init_numtable();
	_stackprof.overall_signals = 0;
	_stackprof.overall_samples = 0;
	_stackprof.during_gc = 0;
    }

    if (mode == sym_object) {
	if (!RTEST(interval)) interval = INT2FIX(1);

	objtracer = rb_tracepoint_new(0, RUBY_INTERNAL_EVENT_NEWOBJ, stackprof_newobj_handler, 0);
	rb_tracepoint_enable(objtracer);
    } else if (mode == sym_wall || mode == sym_cpu) {
	if (!RTEST(interval)) interval = INT2FIX(1000);

	sa.sa_sigaction = stackprof_signal_handler;
	sa.sa_flags = SA_RESTART | SA_SIGINFO;
	sigemptyset(&sa.sa_mask);
	sigaction(mode == sym_wall ? SIGALRM : SIGPROF, &sa, NULL);

	timer.it_interval.tv_sec = 0;
	timer.it_interval.tv_usec = NUM2LONG(interval);
	timer.it_value = timer.it_interval;
	setitimer(mode == sym_wall ? ITIMER_REAL : ITIMER_PROF, &timer, 0);
    } else if (mode == sym_custom) {
	/* sampled manually */
	interval = Qnil;
    } else {
	rb_raise(rb_eArgError, "unknown profiler mode");
    }

    _stackprof.running = 1;
    _stackprof.mode = mode;
    _stackprof.interval = interval;

    return Qtrue;
}

.stop ⇒ Object 



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# File 'ext/stackprof.c', line 111

static VALUE
stackprof_stop(VALUE self)
{
    struct sigaction sa;
    struct itimerval timer;

    if (!_stackprof.running)
	return Qfalse;
    _stackprof.running = 0;

    if (_stackprof.mode == sym_object) {
	rb_tracepoint_disable(objtracer);
    } else if (_stackprof.mode == sym_wall || _stackprof.mode == sym_cpu) {
	memset(&timer, 0, sizeof(timer));
	setitimer(_stackprof.mode == sym_wall ? ITIMER_REAL : ITIMER_PROF, &timer, 0);

	sa.sa_handler = SIG_IGN;
	sa.sa_flags = SA_RESTART;
	sigemptyset(&sa.sa_mask);
	sigaction(_stackprof.mode == sym_wall ? SIGALRM : SIGPROF, &sa, NULL);
    } else if (_stackprof.mode == sym_custom) {
	/* sampled manually */
    } else {
	rb_raise(rb_eArgError, "unknown profiler mode");
    }

    return Qtrue;
}