mirror of https://github.com/golang/go.git
551ada4742
If a fault happens in malloc, inevitably the next thing that happens is a deadlock trying to allocate the panic value that says the fault happened. Stop doing that, two ways. First, reject panic in malloc just as we reject panic in garbage collection. Second, runtime.panicstring was using an error implementation backed by a Go string, so the interface held an allocated *string. Since the actual errors are C strings, define a new error implementation backed by a C char*, which needs no indirection and therefore no allocation. This second fix will avoid allocation for errors like nil panic derefs or division by zero, so it is worth doing even though the first fix should take care of faults during malloc. Update #6419 R=golang-dev, dvyukov, dave CC=golang-dev https://golang.org/cl/13774043 |
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