From: Simon Marchi <simark@simark.ca>
To: Tankut Baris Aktemur <tankut.baris.aktemur@intel.com>,
gdb-patches@sourceware.org
Subject: Re: [PATCH 19/26] gdbserver: fix the declared type of register_status in regcache
Date: Thu, 21 Dec 2023 22:35:01 -0500 [thread overview]
Message-ID: <9f9e76ad-46be-4f53-8820-58e6474e6589@simark.ca> (raw)
In-Reply-To: <0c082e1edb5933f2ac5a7aac06197f8957099628.1677582745.git.tankut.baris.aktemur@intel.com>
On 2023-02-28 06:28, Tankut Baris Aktemur via Gdb-patches wrote:
> The register_status field of regcache is declared as `unsigned char *`.
> This is incorrect, because `enum register_status` from
> gdbsupport/common-regcache.h is based on signed char and
> REG_UNAVAILABLE is defined as -1. Fix the declared type.
>
> The get/set methods already use the correct type, but we update cast
> operations in two places.
> ---
> gdbserver/regcache.cc | 4 ++--
> gdbserver/regcache.h | 4 ++--
> 2 files changed, 4 insertions(+), 4 deletions(-)
>
> diff --git a/gdbserver/regcache.cc b/gdbserver/regcache.cc
> index 0e21c1aa7d1..09ea58bdbd6 100644
> --- a/gdbserver/regcache.cc
> +++ b/gdbserver/regcache.cc
> @@ -147,7 +147,7 @@ regcache::initialize (const target_desc *tdesc,
> = (unsigned char *) xcalloc (1, tdesc->registers_size);
> this->registers_owned = true;
> this->register_status
> - = (unsigned char *) xmalloc (tdesc->reg_defs.size ());
> + = (enum register_status *) xmalloc (tdesc->reg_defs.size ());
The malloc'ed size assumes that a register_status value is 1 byte long.
register_status is indeed 1 byte long, but since it's hidden behind
another name, it's not obvious. You could perhaps switch to:
this->register_status = XNEWVEC (enum register_status, tdesc->reg_defs.size ());
Or C++ify it:
this->register_status = new enum register_status[tdesc->reg_defs.size ()];
But then you have to change the free to a delete[], or store it in an
std::unique_ptr<enum register_status[]>.
Simon
next prev parent reply other threads:[~2023-12-22 3:35 UTC|newest]
Thread overview: 58+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-02-28 11:27 [PATCH 00/26] gdbserver: refactor regcache and allow gradually populating Tankut Baris Aktemur
2023-02-28 11:27 ` [PATCH 01/26] gdbserver: convert init_register_cache into regcache::initialize Tankut Baris Aktemur
2023-12-21 20:12 ` Simon Marchi
2023-02-28 11:28 ` [PATCH 02/26] gdbserver: convert new_register_cache into a regcache constructor Tankut Baris Aktemur
2023-12-21 20:19 ` Simon Marchi
2023-02-28 11:28 ` [PATCH 03/26] gdbserver: by-pass regcache to access tdesc only Tankut Baris Aktemur
2023-12-21 20:22 ` Simon Marchi
2023-02-28 11:28 ` [PATCH 04/26] gdbserver: boolify and defaultize the 'fetch' parameter of get_thread_regcache Tankut Baris Aktemur
2023-12-21 20:24 ` Simon Marchi
2023-02-28 11:28 ` [PATCH 05/26] gdbserver: add a pointer to the owner thread in regcache Tankut Baris Aktemur
2023-12-21 20:28 ` Simon Marchi
2023-02-28 11:28 ` [PATCH 06/26] gdbserver: turn part of get_thread_regcache into regcache::fetch Tankut Baris Aktemur
2023-12-21 20:48 ` Simon Marchi
2023-02-28 11:28 ` [PATCH 07/26] gdbserver: convert regcache_cpy into regcache::copy_from Tankut Baris Aktemur
2023-12-21 20:50 ` Simon Marchi
2023-02-28 11:28 ` [PATCH 08/26] gdbserver: convert free_register_cache into a destructor of regcache Tankut Baris Aktemur
2023-12-21 20:57 ` Simon Marchi
2023-02-28 11:28 ` [PATCH 09/26] gdbserver: extract out regcache::invalidate and regcache::discard Tankut Baris Aktemur
2023-12-21 21:08 ` Simon Marchi
2023-02-28 11:28 ` [PATCH 10/26] gdbserver: convert registers_to_string into regcache::registers_to_string Tankut Baris Aktemur
2023-12-21 21:13 ` Simon Marchi
2023-12-21 21:19 ` Simon Marchi
2023-02-28 11:28 ` [PATCH 11/26] gdbserver: convert registers_from_string into regcache::registers_from_string Tankut Baris Aktemur
2023-02-28 11:28 ` [PATCH 12/26] gdbserver: convert supply_regblock to regcache::supply_regblock Tankut Baris Aktemur
2023-12-21 21:23 ` Simon Marchi
2023-02-28 11:28 ` [PATCH 13/26] gdbserver: convert register_data into regcache::register_data Tankut Baris Aktemur
2023-12-21 21:26 ` Simon Marchi
2023-02-28 11:28 ` [PATCH 14/26] gdbserver: introduce and use regcache::set_register_status Tankut Baris Aktemur
2023-12-21 21:30 ` Simon Marchi
2023-02-28 11:28 ` [PATCH 15/26] gdbserver: check for nullptr condition in regcache::get_register_status Tankut Baris Aktemur
2023-12-21 21:32 ` Simon Marchi
2023-12-21 21:34 ` Simon Marchi
2023-02-28 11:28 ` [PATCH 16/26] gdbserver: boolify regcache fields Tankut Baris Aktemur
2023-12-22 3:20 ` Simon Marchi
2023-02-28 11:28 ` [PATCH 17/26] gdbserver: rename regcache's registers_valid to registers_fetched Tankut Baris Aktemur
2023-12-22 3:23 ` Simon Marchi
2023-02-28 11:28 ` [PATCH 18/26] gdbsupport: fix a typo in a comment in common-regcache.h Tankut Baris Aktemur
2023-12-22 3:24 ` Simon Marchi
2023-02-28 11:28 ` [PATCH 19/26] gdbserver: fix the declared type of register_status in regcache Tankut Baris Aktemur
2023-12-22 3:35 ` Simon Marchi [this message]
2023-02-28 11:28 ` [PATCH 20/26] gdbserver: make some regcache fields private Tankut Baris Aktemur
2023-12-22 3:39 ` Simon Marchi
2023-02-28 11:28 ` [PATCH 21/26] gdbserver: use REG_UNKNOWN for a regcache's register statuses Tankut Baris Aktemur
2023-12-22 4:32 ` Simon Marchi
2023-02-28 11:28 ` [PATCH 22/26] gdbserver: zero-out register values in regcache-discard Tankut Baris Aktemur
2023-12-22 4:36 ` Simon Marchi
2023-02-28 11:28 ` [PATCH 23/26] gdbserver: set register statuses in registers_from_string Tankut Baris Aktemur
2023-12-22 4:40 ` Simon Marchi
2023-02-28 11:28 ` [PATCH 24/26] gdbserver: return tracked register status in regcache_raw_read_unsigned Tankut Baris Aktemur
2023-12-22 4:42 ` Simon Marchi
2023-02-28 11:28 ` [PATCH 25/26] gdbserver: refuse null argument in regcache::supply_regblock Tankut Baris Aktemur
2023-12-22 4:54 ` Simon Marchi
2023-02-28 11:28 ` [PATCH 26/26] gdbserver: allow gradually populating and selectively storing a regcache Tankut Baris Aktemur
2023-12-22 16:25 ` Simon Marchi
2023-03-07 20:39 ` [PATCH 00/26] gdbserver: refactor regcache and allow gradually populating Tom Tromey
2023-03-13 14:33 ` Aktemur, Tankut Baris
2023-03-28 13:42 ` Aktemur, Tankut Baris
2023-06-20 12:58 ` Aktemur, Tankut Baris
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