Re: pmap: German umlauts are shown as question marks

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On 2024/11/05 09:23:16 +0100, Daniel Hofstetter wrote:
> Hi,
>=20
> I noticed that if I have a binary with German umlauts, the umlauts are
> shown correctly in the first line but not in the memory map. There,
> they are shown as question marks:
>=20
> $ pmap 19508
> 19508:   ./target/debug/hello_=C3=A4=C3=B6=C3=BC
> 00005db66dc51000     20K r---- hello_??????
> 00005db66dc56000    264K r-x-- hello_??????
> 00005db66dc98000     52K r---- hello_??????
> 00005db66dca5000     12K r---- hello_??????
> 00005db66dca8000      4K rw--- hello_??????

There are two places where isprint(3) is checking the bytes of the remaining
path in /proc/<pid>/maps ... UTF-8 encoding are multibyte characters means
such multibyte characters are mapped to `?' for each byte.

Werner

--=20
  "Having a smoking section in a restaurant is like having
          a peeing section in a swimming pool." -- Edward Burr

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