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debugger: do not panic if defer location can not be found (#3329)

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convertDefers should not try to dereference nil if the deferred
location does not belong to a function.
This commit is contained in:
Alessandro Arzilli 2023-04-24 22:38:19 +02:00 committed by GitHub
parent 64d5ce26d6
commit 83a2555497
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 21 additions and 16 deletions
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37
service/debugger/debugger.go
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@ -1849,25 +1849,30 @@ func (d *Debugger) convertDefers(defers []*proc.Defer) []api.Defer {
ddf, ddl, ddfn := defers[i].DeferredFunc(d.target.Selected)
drf, drl, drfn := d.target.Selected.BinInfo().PCToLine(defers[i].DeferPC)
r[i] = api.Defer{
DeferredLoc: api.ConvertLocation(proc.Location{
PC: ddfn.Entry,
File: ddf,
Line: ddl,
Fn: ddfn,
}),
DeferLoc: api.ConvertLocation(proc.Location{
PC: defers[i].DeferPC,
File: drf,
Line: drl,
Fn: drfn,
}),
SP: defers[i].SP,
}
if defers[i].Unreadable != nil {
r[i].Unreadable = defers[i].Unreadable.Error()
} else {
var entry uint64 = defers[i].DeferPC
if ddfn != nil {
entry = ddfn.Entry
}
r[i] = api.Defer{
DeferredLoc: api.ConvertLocation(proc.Location{
PC: entry,
File: ddf,
Line: ddl,
Fn: ddfn,
}),
DeferLoc: api.ConvertLocation(proc.Location{
PC: defers[i].DeferPC,
File: drf,
Line: drl,
Fn: drfn,
}),
SP: defers[i].SP,
}
}
}
return r