From: Alain Frisch <alain@frisch.fr>
To: Dmitry Bely <dmitry.bely@gmail.com>
Cc: caml-list@inria.fr
Subject: Re: [Caml-list] Compiler bug?
Date: Mon, 06 Aug 2012 12:34:33 +0200 [thread overview]
Message-ID: <501F9DB9.2050805@frisch.fr> (raw)
In-Reply-To: <CAMT7qiTCnxbAwbPSiXxxm3EBFVyTad98YqxxxveoPkhepKbCkA@mail.gmail.com>
On 08/06/2012 12:20 PM, Dmitry Bely wrote:
> I always thought that local roots are memory-based. How GC knows that
> in this case [ebx] should be updated? (remember, the parameter was
> passed in [eax]) Could you point me to the relevant part of Ocaml
> compiler sources?
The compiler generates 'frame descriptors', which associate to each
possible GC call site the set of registers and stack slots which hold
values.
Look for caml_frame_descriptors. The logic to scan frame descriptors is
in asmrun/roots.c. The implementation of caml_call_gc (e.g. in amd64.S)
saves/restored machine registers to/from caml_gc_regs.
Alain
next prev parent reply other threads:[~2012-08-06 10:59 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-08-06 10:04 Dmitry Bely
2012-08-06 10:11 ` Alain Frisch
2012-08-06 10:20 ` Dmitry Bely
2012-08-06 10:34 ` Alain Frisch [this message]
2012-08-06 11:03 ` Dmitry Bely
2012-08-06 11:32 ` Alain Frisch
2012-08-06 12:16 ` Dmitry Bely
2012-08-07 1:35 ` Cedric Cellier
2012-08-08 16:03 ` Dmitry Bely
2012-08-08 18:03 ` Alain Frisch
2012-08-08 18:22 ` Jesper Louis Andersen
2012-08-08 18:40 ` Dmitry Bely
2012-08-08 19:29 ` Fabrice Le Fessant
2012-08-08 23:34 ` Anil Madhavapeddy
2012-08-09 0:53 ` Francois Berenger
-- strict thread matches above, loose matches on Subject: below --
2006-05-17 23:14 compiler bug? Dan Koppel
2006-05-17 23:33 ` [Caml-list] " John Carr
2006-05-18 17:15 ` Xavier Leroy
2006-05-18 17:34 ` Jacques Carette
2006-05-18 17:46 ` Xavier Leroy
2006-05-18 19:31 ` Jacques Carette
2006-05-18 20:07 ` David Brown
2006-05-18 20:15 ` Jacques Carette
2006-05-18 20:20 ` Alain Frisch
2006-05-18 18:19 ` skaller
2006-05-18 18:53 ` Jacques Carette
2006-05-19 1:47 ` skaller
2006-05-19 2:17 ` Brian Hurt
2006-05-19 3:11 ` skaller
2006-05-19 16:48 ` Jacques Carette
2006-05-19 19:10 ` skaller
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