From: Simon Marchi <simark@simark.ca>
To: Tom Tromey <tom@tromey.com>, gdb-patches@sourceware.org
Subject: Re: [PATCH 5/8] Add per-unit obstack
Date: Wed, 12 Feb 2020 03:53:00 -0000 [thread overview]
Message-ID: <8e13cd77-cbe8-4549-5ff3-2cb5fbe32b47@simark.ca> (raw)
In-Reply-To: <20200208152758.29385-6-tom@tromey.com>
On 2020-02-08 10:27 a.m., Tom Tromey wrote:
> This adds an auto_obstack to the DWARF frame comp_unit object, and
> then changes the remaining code here to use the comp_unit obstack
> rather than the objfile obstack.
>
> At this point, all the storage for frame data is self-contained --
> that is, it is independent of the objfile.
Would it be simpler to eliminate the obstack by making dwarf2_cie_table
and dwarf2_fde_table hold objects instead of pointers? On top of that,
it should be good for performance as well, at least when doing lookups.
The only issue is that dwarf2_cie objects are referenced by address by
the FDEs, so we must make sure they don't get moved by the container.
But I believe std::unordered_map guarantees that (disabling copy and
assign on dwarf2_cie would verify it). Or worst case, the it could
be an std::unordered_map of std::unique_ptr.
Simon
next prev parent reply other threads:[~2020-02-12 3:53 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-08 15:28 [PATCH 0/8] Share DWARF frame information across inferiors Tom Tromey
2020-02-08 15:28 ` [PATCH 7/8] Remove the objfile backlink from comp_unit Tom Tromey
2020-02-09 23:56 ` Christian Biesinger via gdb-patches
2020-02-12 0:26 ` Tom Tromey
2020-02-11 10:40 ` Luis Machado
2020-02-08 15:28 ` [PATCH 8/8] Move the frame data to the BFD when possible Tom Tromey
2020-02-11 10:45 ` Luis Machado
2020-02-12 0:31 ` Tom Tromey
2020-11-14 3:31 ` Simon Marchi
2020-02-08 15:28 ` [PATCH 3/8] Change fde table to a vector Tom Tromey
[not found] ` <5a373a74-9283-5d82-a22d-7a2606a4d3f5@linaro.org>
2020-02-12 0:29 ` Tom Tromey
2020-02-12 3:28 ` Simon Marchi
2020-02-12 3:33 ` Simon Marchi
2020-02-12 22:36 ` Tom Tromey
2020-02-12 22:47 ` Simon Marchi
2020-02-08 15:28 ` [PATCH 4/8] Store the comp_unit instead of the FDE table Tom Tromey
2020-02-09 23:56 ` Christian Biesinger via gdb-patches
2020-02-12 0:19 ` Tom Tromey
2020-02-11 10:32 ` Luis Machado
2020-02-12 0:20 ` Tom Tromey
2020-02-12 3:36 ` Simon Marchi
2020-02-12 22:20 ` Tom Tromey
2020-02-08 15:28 ` [PATCH 2/8] Dont' allow copying of auto_obstack Tom Tromey
2020-02-09 23:56 ` Christian Biesinger via gdb-patches
2020-02-12 0:16 ` Tom Tromey
2020-02-12 0:53 ` Simon Marchi
2020-02-12 1:01 ` Tom Tromey
2020-02-08 15:28 ` [PATCH 5/8] Add per-unit obstack Tom Tromey
2020-02-11 10:34 ` Luis Machado
2020-02-12 3:53 ` Simon Marchi [this message]
2020-02-12 22:41 ` Tom Tromey
2020-02-12 22:48 ` Simon Marchi
2020-02-12 22:51 ` Tom Tromey
2020-02-08 15:28 ` [PATCH 1/8] Don't forward-declare struct objfile in frame.h Tom Tromey
2020-02-12 0:51 ` Simon Marchi
2020-02-12 1:59 ` Tom Tromey
2020-02-08 15:28 ` [PATCH 6/8] Remove a use of the comp_unit backlink Tom Tromey
2020-02-08 15:29 ` [PATCH 0/8] Share DWARF frame information across inferiors Tom Tromey
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