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Re: [Patch, PR 61061] Add state limit for regex NFA


Hi,

On 06/27/2014 05:56 AM, Tim Shen wrote:
The limit can be customized by defining a macro
_GLIBCXX_REGEX_STATE_LIMIT. The default value is 100000.

The testcase can be handled if we optimize consecutive quantifiers
(collapse them to one). But cases like "(a{100}b){100}" can't be
handled still.

We implement range quantifier "(foo){n}" by copying state sequence
(foo) n-1 times. That consumes more space. We may reimplement it (by
adding a new _S_op*) someday.

Bootstrapped and tested.
The actual patch is missing.. ;)

Paolo.

PS: sorry for being distracted by other issues: what happened to the other regex issue? I think we are simply going to apply, when ready, your more complete fix, right?


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