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Wed Aug 1 07:28:53 PDT 2012

As far as I know, you don't need memory to be both writable and executable for JIT compilation. This issue looks like evidence of something bad happening in WebKit's JavaScript interpreter:

1) For one, memory should never be both writable and executable. On Windows, this would be a violation under DEP.
2) It's apparently a bad idea to use heap memory for this (according to Ulrich Drepper, at least:

(This issue seems similar to #35154, but 1) that issue lacked enough logging information to confirm, and 2) the missing permission there was execmem, rather than execheap.)

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