func TestFindFunc(t *testing.T) {
eo := func(cond bool, s string, args ...interface{}) {
if cond {
t.Fatalf(s, args...)
}
}
tbl := debug8.NewTable()
funcs := sortTable(tbl)
_, f := findFunc(funcs, 1, tbl)
eo(f != nil, "func not found")
tbl = &debug8.Table{
Funcs: map[string]*debug8.Func{
"f1": {Size: 20, Start: 0},
},
}
funcs = sortTable(tbl)
_, f = findFunc(funcs, 30, tbl)
eo(f != nil, "findFunc error")
_, f = findFunc(funcs, 10, tbl)
eo(f.Start != 0, "findFunc error")
tbl = &debug8.Table{
Funcs: map[string]*debug8.Func{
"f1": {Size: 20, Start: 0},
"f2": {Size: 1, Start: 25},
"f3": {Size: 20, Start: 27},
},
}
funcs = sortTable(tbl)
_, f = findFunc(funcs, 26, tbl)
eo(f.Start != 25,
"pc is %v\n start is %v and length is %v\n", 25, f.Start, f.Size)
_, f = findFunc(funcs, 24, tbl)
eo(f != nil, "findFunc error")
_, f = findFunc(funcs, 50, tbl)
eo(f != nil, "findFunc error")
tbl = debug8.NewTable()
var sum uint32
for i := 0; i < 100; i++ {
name := "f" + strconv.Itoa(i)
size := rand.Uint32()
tbl.Funcs[name] = &debug8.Func{Size: size, Start: sum}
sum = sum + size + 1
}
pc := rand.Uint32()
for pc > sum {
pc = rand.Uint32()
}
funcs = sortTable(tbl)
_, f = findFunc(funcs, pc, tbl)
eo(f.Start >= pc || f.Size+f.Start <= pc,
"pc is %v\n func starts %v and length is %v\n", pc, f.Start, f.Size)
}
func (b *Builder) link(out io.Writer, p *pkg, main string) error {
var funcs []*link8.PkgSym
addInit := func(p *pkg) {
name := p.pkg.Init
if name != "" && p.pkg.Lib.HasFunc(name) {
funcs = append(funcs, &link8.PkgSym{p.path, name})
}
}
for _, dep := range p.deps {
addInit(b.pkgs[dep])
}
addInit(p)
funcs = append(funcs, &link8.PkgSym{p.path, main})
debugTable := debug8.NewTable()
job := link8.NewJob(b.linkPkgs, funcs)
job.InitPC = b.InitPC
job.FuncDebug = func(pkg, name string, addr, size uint32) {
debugTable.LinkFunc(b.debugFuncs, pkg, name, addr, size)
}
secs, err := job.Link()
if err != nil {
return err
}
debugSec, err := debugSection(debugTable)
if err != nil {
return err
}
secs = append(secs, debugSec)
return e8.Write(out, secs)
}