Handle functions with no stack map entries.

randall77 · randall77 · commit 7301434a573e · 2017-10-23T15:24:55.000-07:00
diff --git a/gocore/parse.go b/gocore/parse.go
@@ -462,6 +462,8 @@ func (m *module) readFunc(r region, pcln region) *Func {
 	// Read pcln tables we need.
 	if stackmap := int(r.p.rtConstants["_PCDATA_StackMapIndex"]); stackmap < len(f.pcdata) {
 		f.stackMap.read(r.p.proc, pcln.SliceIndex(int64(f.pcdata[stackmap])).a)
+	} else {
+		f.stackMap.setEmpty()
 	}
 
 	return f
diff --git a/gocore/pctab.go b/gocore/pctab.go
@@ -48,6 +48,10 @@ func (p *pcTab) read(core *core.Process, data core.Address) {
 	}
 }
 
+func (p *pcTab) setEmpty() {
+	p.entries = []pcTabEntry{{bytes: 1<<63 - 1, val: -1}}
+}
+
 func (t *pcTab) find(off int64) int64 {
 	for _, e := range t.entries {
 		if off < e.bytes {

Original file line number	Diff line number	Diff line change
`@@ -462,6 +462,8 @@ func (m module) readFunc(r region, pcln region) Func {`
`462`	`462`	`// Read pcln tables we need.`
`463`	`463`	`if stackmap := int(r.p.rtConstants["_PCDATA_StackMapIndex"]); stackmap < len(f.pcdata) {`
`464`	`464`	`f.stackMap.read(r.p.proc, pcln.SliceIndex(int64(f.pcdata[stackmap])).a)`
	`465`	`+ } else {`
	`466`	`+ f.stackMap.setEmpty()`
`465`	`467`	`}`
`466`	`468`
`467`	`469`	`return f`
Original file line number	Diff line number	Diff line change
`@@ -48,6 +48,10 @@ func (p pcTab) read(core core.Process, data core.Address) {`
`48`	`48`	`}`
`49`	`49`	`}`
`50`	`50`
	`51`	`+func (p *pcTab) setEmpty() {`
	`52`	`+ p.entries = []pcTabEntry{{bytes: 1<<63 - 1, val: -1}}`
	`53`	`+}`
	`54`	`+`
`51`	`55`	`func (t *pcTab) find(off int64) int64 {`
`52`	`56`	`for _, e := range t.entries {`
`53`	`57`	`if off < e.bytes {`