}

			for _, m := range prof.Mapping {
				if miss[m] && m.HasFunctions {
					t.Errorf("mapping %+v has HasFunctions=true, but contains locations with failed symbolization", m)
					continue
				}
				if !miss[m] && hit[m] && !m.HasFunctions {
					t.Errorf("mapping %+v has HasFunctions=false, but all referenced locations from this lapping were symbolized successfully", m)
					continue
				}

// symbolize locations from mappings not already marked as HasFunctions. Never
// attempts symbolization of addresses from unsymbolizable system
// mappings as those may look negative - e.g. "[vsyscall]".
func Symbolize(p *profile.Profile, force bool, sources plugin.MappingSources, syms func(string, string) ([]byte, error), ui plugin.UI) error {
	for _, m := range p.Mapping {
		if !force && m.HasFunctions {

		}
	}

	return nil
}

// HasFunctions determines if all locations in this profile have
// symbolized function information.
func (p *Profile) HasFunctions() bool {
	for _, l := range p.Location {
		if l.Mapping == nil || !l.Mapping.HasFunctions {
			return false
		}
	}
	return true
}

			fillIdx++
		}
	}
	p.Sample = p.Sample[:fillIdx]
	return nil
}

// HasFunctions determines if all locations in this profile have
// symbolized function information.
func (p *Profile) HasFunctions() bool {
	for _, l := range p.Location {
		if l.Mapping != nil && !l.Mapping.HasFunctions {
			return false
		}
	}
	return true
}

		if len(locs) == 0 {
			// The mapping is dangling and has no locations pointing to it.
			continue
		}
		// Do not attempt to re-symbolize a mapping that has already been symbolized.
		if !force && (m.HasFunctions || m.HasFilenames || m.HasLineNumbers) {
			continue
		}
		if m.File == "" {
			if midx == 0 {
				ui.PrintErr("Main binary filename not available.")
				continue
			}
			missingBinaries = true

		Start:           src.Start,
		Limit:           src.Limit,
		Offset:          src.Offset,
		File:            src.File,
		BuildID:         src.BuildID,
		HasFunctions:    src.HasFunctions,
		HasFilenames:    src.HasFilenames,
		HasLineNumbers:  src.HasLineNumbers,
		HasInlineFrames: src.HasInlineFrames,
	}
	pm.p.Mapping = append(pm.p.Mapping, m)

	// Update memoization tables.

	encodeUint64Opt(b, 1, p.ID)
	encodeUint64Opt(b, 2, p.Start)
	encodeUint64Opt(b, 3, p.Limit)
	encodeUint64Opt(b, 4, p.Offset)
	encodeInt64Opt(b, 5, p.fileX)
	encodeInt64Opt(b, 6, p.buildIDX)
	encodeBoolOpt(b, 7, p.HasFunctions)
	encodeBoolOpt(b, 8, p.HasFilenames)
	encodeBoolOpt(b, 9, p.HasLineNumbers)
	encodeBoolOpt(b, 10, p.HasInlineFrames)
}

var mappingDecoder = []decoder{
	nil, // 0

		locs = b.appendLocsForStack(locs[:0], e.stk)

		b.pbSample(values, locs, labels)
	}

	for i, m := range b.mem {
		hasFunctions := m.funcs == lookupTried // lookupTried but not lookupFailed
		b.pbMapping(tagProfile_Mapping, uint64(i+1), uint64(m.start), uint64(m.end), m.offset, m.file, m.buildID, hasFunctions)
	}

	// TODO: Anything for tagProfile_DropFrames?
	// TODO: Anything for tagProfile_KeepFrames?

	encodeUint64Opt(b, 1, p.ID)
	encodeUint64Opt(b, 2, p.Start)
	encodeUint64Opt(b, 3, p.Limit)
	encodeUint64Opt(b, 4, p.Offset)
	encodeInt64Opt(b, 5, p.fileX)
	encodeInt64Opt(b, 6, p.buildIDX)
	encodeBoolOpt(b, 7, p.HasFunctions)
	encodeBoolOpt(b, 8, p.HasFilenames)
	encodeBoolOpt(b, 9, p.HasLineNumbers)
	encodeBoolOpt(b, 10, p.HasInlineFrames)
}

var mappingDecoder = []decoder{
	nil, // 0

		Offset:                 src.Offset,
		File:                   src.File,
		KernelRelocationSymbol: src.KernelRelocationSymbol,
		BuildID:                src.BuildID,
		HasFunctions:           src.HasFunctions,
		HasFilenames:           src.HasFilenames,
		HasLineNumbers:         src.HasLineNumbers,
		HasInlineFrames:        src.HasInlineFrames,
	}
	pm.p.Mapping = append(pm.p.Mapping, m)