f.sb.Reset()
	return err
}

func (t *tracer) Close() error {
	f := <-t.file
	defer func() { t.file <- f }()

	_, firstErr := f.f.WriteString("]")
	if err := f.f.Close(); firstErr == nil {
		firstErr = err
	}
	return firstErr
}

func (t *tracer) getNextTID() uint64 {
	return t.nextTID.Add(1)
}

func (t *tracer) getNextFlowID() uint64 {
	return t.nextFlowID.Add(1)
}

				// A leaf function with no locals has no frame.
				p.From.Sym.Set(obj.AttrNoFrame, true)
			}

			if !p.From.Sym.NoFrame() {
				// If there is a stack frame at all, it includes
				// space to save the LR.
				c.autosize += 8
			}

			if c.autosize != 0 {
				extrasize := int32(0)
				if c.autosize%16 == 8 {
					// Allocate extra 8 bytes on the frame top to save FP
					extrasize = 8

		return nil, fmt.Errorf("unexpected addr2line output: %s", resp)
	}

	var stack []plugin.Frame
	for {
		frame, end := d.readFrame()
		if end {
			break
		}

		if frame != (plugin.Frame{}) {
			stack = append(stack, frame)
		}
	}
	return stack, err
}

// addrInfo returns the stack frame information for a specific program
// address. It returns nil if the address could not be identified.

The frame size <code>$24-8</code> states that the function has a 24-byte frame
and is called with 8 bytes of argument, which live on the caller's frame.
If <code>NOSPLIT</code> is not specified for the <code>TEXT</code>,
the argument size must be provided.
For assembly functions with Go prototypes, <code>go</code> <code>vet</code> will check that the
argument size is correct.
</p>

<p>

	TLSBSS = 256

	// Do not insert instructions to allocate a stack frame for this function.
	// Only valid on functions that declare a frame size of 0.
	// TODO(mwhudson): only implemented for ppc64x at present.
	NOFRAME = 512

	// Function can call reflect.Type.Method or reflect.Type.MethodByName.
	REFLECTMETHOD = 1024

	// Function is the outermost frame of the call stack. Call stack unwinders
	// should stop at this function.

The maximum stack depth for alloc, mutex, block, threadcreate and goroutine

		l.IsFolded = false
		for i, frame := range stack {
			if frame.Func != "" {
				m.HasFunctions = true
			}
			if frame.File != "" {
				m.HasFilenames = true
			}
			if frame.Line != 0 {
				m.HasLineNumbers = true
			}
			f := addFunction(&profile.Function{
				Name:       frame.Func,
				SystemName: frame.Func,
				Filename:   frame.File,
			})
			l.Line[i] = profile.Line{

// in the object file; for example, for an ELF object, abbrev is the contents of
// the ".debug_abbrev" section.
func New(abbrev, aranges, frame, info, line, pubnames, ranges, str []byte) (*Data, error) {
	d := &Data{
		abbrev:      abbrev,
		aranges:     aranges,
		frame:       frame,
		info:        info,
		line:        line,
		pubnames:    pubnames,
		ranges:      ranges,
		str:         str,

	{"-O2"},
	{"-Osmall"},
	{"-W"},
	{"-Wall"},
	{"-Wp,-Dfoo=bar"},
	{"-Wp,-Ufoo"},
	{"-Wp,-Dfoo1"},
	{"-Wp,-Ufoo1"},
	{"-flto"},
	{"-fobjc-arc"},
	{"-fno-objc-arc"},
	{"-fomit-frame-pointer"},
	{"-fno-omit-frame-pointer"},
	{"-fpic"},
	{"-fno-pic"},
	{"-fPIC"},
	{"-fno-PIC"},
	{"-fpie"},
	{"-fno-pie"},
	{"-fPIE"},
	{"-fno-PIE"},
	{"-fsplit-stack"},
	{"-fno-split-stack"},
	{"-fstack-xxx"},

				}
				// funcdata for functions with no local variables in frame.
				// Define two zero-length bitmaps, because the same index is used
				// for the local variables as for the argument frame, and assembly
				// frames have two argument bitmaps, one without results and one with results.
				// Write []uint32{2, 0}.
				b := make([]byte, 8)