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runtime: gdb support, fix pretty printing of channels.
The type to cast the elements to was stolen from a field that's no longer there. R=rsc CC=golang-dev https://golang.org/cl/5143050
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@ -122,8 +122,8 @@ class ChanTypePrinter:
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return str(self.val.type)
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def children(self):
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# see chan.c chanbuf()
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et = [x.type for x in self.val['free'].type.target().fields() if x.name == 'elem'][0]
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# see chan.c chanbuf(). et is the type stolen from hchan<T>::recvq->first->elem
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et = [x.type for x in self.val['recvq']['first'].type.target().fields() if x.name == 'elem'][0]
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ptr = (self.val.address + 1).cast(et.pointer())
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for i in range(self.val["qcount"]):
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j = (self.val["recvx"] + i) % self.val["dataqsiz"]
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