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package.go
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package.go
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package entity
import (
"fmt"
"runtime/debug"
"github.com/ZxillyFork/gore"
"github.com/ZxillyFork/gosym"
"github.com/samber/lo"
"golang.org/x/exp/maps"
"github.com/Zxilly/go-size-analyzer/internal/utils"
)
type PackageMap map[string]*Package
type PackageType = string
const (
PackageTypeMain PackageType = "main"
PackageTypeStd PackageType = "std"
PackageTypeVendor PackageType = "vendor"
PackageTypeGenerated PackageType = "generated"
PackageTypeUnknown PackageType = "unknown"
)
type Package struct {
Name string `json:"name"`
Type PackageType `json:"type"`
SubPackages PackageMap `json:"subPackages"`
Files []*File `json:"files"`
Size uint64 `json:"size"` // late filled
loaded bool // mean it comes from gore
// should not be used to calculate size,
// since linker can create overlapped symbols.
// relies on coverage.
// currently only data symbol
Symbols []*Symbol `json:"symbols"`
symbolAddrSpace AddrSpace
coverage *utils.ValueOnce[AddrCoverage]
// should have at least one of them
GorePkg *gore.Package `json:"-"`
DebugMod *debug.Module `json:"-"`
}
func NewPackage() *Package {
return &Package{
SubPackages: make(map[string]*Package),
Files: make([]*File, 0),
Symbols: make([]*Symbol, 0),
coverage: utils.NewOnce[AddrCoverage](),
symbolAddrSpace: AddrSpace{},
}
}
func NewPackageWithGorePackage(gp *gore.Package, name string, typ PackageType, pclntab *gosym.Table) *Package {
p := NewPackage()
p.Name = utils.Deduplicate(name)
p.Type = typ
p.loaded = true
p.GorePkg = gp
getFunction := func(f *gore.Function) *Function {
return &Function{
Name: utils.Deduplicate(f.Name),
Addr: f.Offset,
CodeSize: f.End - f.Offset,
PclnSize: NewPclnSymbolSize(f.Func),
Type: FuncTypeFunction,
disasm: AddrSpace{},
pkg: p,
}
}
for _, f := range gp.Functions {
src, _, _ := pclntab.PCToLine(f.Offset)
sf := getFunction(f)
sf.Type = FuncTypeFunction
p.addFunction(src, sf)
}
for _, mf := range gp.Methods {
src, _, _ := pclntab.PCToLine(mf.Offset)
sf := getFunction(mf.Function)
sf.Type = FuncTypeMethod
sf.Receiver = utils.Deduplicate(mf.Receiver)
p.addFunction(src, sf)
}
return p
}
func (p *Package) fileEnsureUnique() {
seen := make(map[string]*File)
for _, f := range p.Files {
if old, ok := seen[f.FilePath]; ok {
old.Functions = append(old.Functions, f.Functions...)
} else {
seen[f.FilePath] = f
}
}
p.Files = maps.Values(seen)
}
func (p *Package) addFunction(path string, fn *Function) {
file := p.getOrInitFile(path)
fn.File = file
file.Functions = append(file.Functions, fn)
}
func (p *Package) getOrInitFile(s string) *File {
for _, f := range p.Files {
if f.FilePath == s {
return f
}
}
f := &File{
FilePath: utils.Deduplicate(s),
Pkg: p,
Functions: make([]*Function, 0),
}
p.Files = append(p.Files, f)
return f
}
// Merge p always hold an empty subpackage
func (p *Package) Merge(rp *Package) {
if rp == nil {
panic(fmt.Errorf("nil package"))
}
if (rp.loaded) && p.Name != rp.Name {
panic(fmt.Errorf("package name not match %s %s", p.Name, rp.Name))
}
p.Files = append(p.Files, rp.Files...)
// prevent duplicate files
p.fileEnsureUnique()
for k, v := range rp.SubPackages {
p.SubPackages[k] = v
}
}
func (p *Package) GetFunctions() []*Function {
funcs := lo.Reduce(p.Files,
func(agg []*Function, item *File, _ int) []*Function {
return append(agg, item.Functions...)
}, make([]*Function, 0))
return funcs
}
func (p *Package) GetDisasmAddrSpace() AddrSpace {
spaces := make([]AddrSpace, 0)
for _, f := range p.GetFunctions() {
spaces = append(spaces, f.disasm)
}
return MergeAddrSpace(spaces...)
}
func (p *Package) GetFunctionSizeRecursive() uint64 {
size := uint64(0)
for _, f := range p.GetFunctions() {
size += f.Size()
}
for _, sp := range p.SubPackages {
size += sp.GetFunctionSizeRecursive()
}
return size
}
func (p *Package) GetPackageCoverage() AddrCoverage {
p.coverage.Do(func() {
disasmcov := p.GetDisasmAddrSpace().ToDirtyCoverage()
symbolcov := p.symbolAddrSpace.ToDirtyCoverage()
covs := []AddrCoverage{disasmcov, symbolcov}
for _, sp := range p.SubPackages {
covs = append(covs, sp.GetPackageCoverage())
}
cov, err := MergeAndCleanCoverage(covs)
if err != nil {
panic(err)
}
p.coverage.Set(cov)
})
return p.coverage.Get()
}
func (p *Package) AssignPackageSize() {
pkgSize := p.GetFunctionSizeRecursive()
for _, cp := range p.GetPackageCoverage() {
pkgSize += cp.Pos.Size
}
p.Size = pkgSize
}
func (p *Package) AddSymbol(addr uint64, size uint64, typ AddrType, name string, ap *Addr) {
// first, load as coverage
p.symbolAddrSpace.Insert(ap)
// then, add to the symbol list
p.Symbols = append(p.Symbols, NewSymbol(name, addr, size, typ))
}