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From: Jeffrey Walton <noloader@gmail.com>
To: 47429@debbugs.gnu.org
Subject: bug#47429: Re 47429:allocating JIT code buffer failed: Permission denied
Date: Fri, 26 Mar 2021 21:29:07 -0400	[thread overview]
Message-ID: <CAH8yC8kGzeu3cWDNR+2xYNovPB4D3iV3Z8AY9HwYHmKi1aRK5g@mail.gmail.com> (raw)
In-Reply-To: <CAH8yC8m8d5uVWOAFAPdr_v5KCg_o6xAhiU+T17Way3ZaDuetDw@mail.gmail.com>

This looks like the Apple article of interest:
https://developer.apple.com/documentation/apple-silicon/porting-just-in-time-compilers-to-apple-silicon.

According to the article, the page should be mapped with MAP_JIT.
Before instructions are written, pthread_jit_write_protect_np should
be called. After writing the jitted code, call
pthread_jit_write_protect_np again and call sys_icache_invalidate.

It looks like the OpenJDK folks are also experiencing similar issues.

Jeff





  parent reply	other threads:[~2021-03-27  1:29 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-03-26 22:48 bug#47429: allocating " Jeffrey Walton
2021-03-26 23:27 ` bug#47429: Re 47429:allocating " Jeffrey Walton
2021-03-26 23:34 ` Jeffrey Walton
2021-03-27  1:29 ` Jeffrey Walton [this message]
2021-03-27  2:39 ` Jeffrey Walton

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