[ruby-core:117341] [Ruby master Feature#20396] ObjectSpace.dump_all(string_value: false): skip dumping the String contents

["byroot (Jean Boussier) via ruby-core" <ruby-core@ml.ruby-lang.org>]

Issue #20396 has been reported by byroot (Jean Boussier).

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Feature #20396: ObjectSpace.dump_all(string_value: false): skip dumping the String contents
https://bugs.ruby-lang.org/issues/20396

* Author: byroot (Jean Boussier)
* Status: Open
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`ObjectSpace.dump_all` is a very useful method to debug memory leaks and such, hence is frequently needed in production. But since all the 7bit strings content is included in the dump, it incur the risk of leaking personal data, or secrets.

Also, in many case the strings content isn't that helpful and is just making the dump much bigger for no good reason. And only pure-ASCII strings are dumped this way, which means all the tools that process these dumps should already be compatible with a dump without any string content.

### Feature

I propose to add another optional parameter to `dump_all`: `string_value: false`. When passed, no String content is ever dumped regardless of its coderange.

Implementation: https://github.com/ruby/ruby/pull/10382

cc @zzak



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