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Handle NULL addrs / empty OP stacks

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This commit is contained in:
Derek Parker
2015-05-07 16:55:06 -05:00
parent df78a294e4
commit 5a408e7054
3 changed files with 17 additions and 0 deletions
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9
proctl/stack.go
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@ -26,6 +26,12 @@ func (thread *ThreadContext) ReturnAddress() (uint64, error) {
return locations[0].addr, nil
}
type NullAddrError struct{}
func (n NullAddrError) Error() string {
return "NULL address"
}
func (dbp *DebuggedProcess) stacktrace(pc, sp uint64, depth int) ([]stackLocation, error) {
var (
ret = pc
@ -41,6 +47,9 @@ func (dbp *DebuggedProcess) stacktrace(pc, sp uint64, depth int) ([]stackLocatio
}
btoffset += fde.ReturnAddressOffset(ret)
retaddr = uintptr(int64(sp) + btoffset + (i * 8))
if retaddr == 0 {
return nil, NullAddrError{}
}
_, err = readMemory(dbp.CurrentThread, retaddr, data)
if err != nil {
return nil, err