From: Simon Marchi <simon.marchi@efficios.com>
To: Tom Tromey <tom@tromey.com>,
Simon Marchi via Gdb-patches <gdb-patches@sourceware.org>
Subject: Re: [PATCH 1/4] gdb: add intern method to objfile_per_bfd_storage
Date: Fri, 2 Apr 2021 11:38:15 -0400 [thread overview]
Message-ID: <292c9d0b-3a96-22b9-705c-e8076efb96e1@efficios.com> (raw)
In-Reply-To: <87eeftq4qt.fsf@tromey.com>
On 2021-04-01 1:44 p.m., Tom Tromey wrote:
>>>>>> "Simon" == Simon Marchi via Gdb-patches <gdb-patches@sourceware.org> writes:
>
> Simon> In this particular case, callers of this intern method have a C string
> Simon> and an std::string, so we know they are null-terminated.
>
> It seems a little dangerous to do this, though, in that someone might
> add a call without remembering or checking the invariant.
> Maybe it's better to just have 2 overloads on the per-bfd object.
Yeah, you're right. I changed the patch to just move the two overloads
from objfile to objfile_per_bfd_storage. Here's what I pushed:
From 4a4f97c129b26445ff14d0e5323feeb80610a539 Mon Sep 17 00:00:00 2001
From: Simon Marchi <simon.marchi@polymtl.ca>
Date: Fri, 2 Apr 2021 11:23:52 -0400
Subject: [PATCH] gdb: add intern methods to objfile_per_bfd_storage
This allows keeping the objfile_per_bfd_storage implementation details
into objfile_per_bfd_storage, instead of into objfile. And this makes
the intern methods usable for code that only has an
objfile_per_bfd_storage to work with.
gdb/ChangeLog:
* objfiles.h (struct objfile_per_bfd_storage) <intern>: New
methods.
(struct objfile) <intern>: Use
objfile::objfile_per_bfd_storage::intern.
Change-Id: Ifd54026c5efaeffafac9b84ff84c199acc7ce78a
---
gdb/ChangeLog | 7 +++++++
gdb/objfiles.h | 22 +++++++++++++++++++---
2 files changed, 26 insertions(+), 3 deletions(-)
diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 1bdd652b632a..ac64f5c76099 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,10 @@
+2021-04-02 Simon Marchi <simon.marchi@polymtl.ca>
+
+ * objfiles.h (struct objfile_per_bfd_storage) <intern>: New
+ methods.
+ (struct objfile) <intern>: Use
+ objfile::objfile_per_bfd_storage::intern.
+
2021-04-01 Simon Marchi <simon.marchi@efficios.com>
* gdbtypes.h (TYPE_FLAG_ENUM): Remove, replace all uses
diff --git a/gdb/objfiles.h b/gdb/objfiles.h
index 4cd392bd7f02..e8a8b5f6de78 100644
--- a/gdb/objfiles.h
+++ b/gdb/objfiles.h
@@ -270,6 +270,23 @@ struct objfile_per_bfd_storage
~objfile_per_bfd_storage ();
+ /* Intern STRING in this object's string cache and return the unique copy.
+ The copy has the same lifetime as this object.
+
+ STRING must be null-terminated. */
+
+ const char *intern (const char *str)
+ {
+ return (const char *) string_cache.insert (str, strlen (str) + 1);
+ }
+
+ /* Same as the above, but for an std::string. */
+
+ const char *intern (const std::string &str)
+ {
+ return (const char *) string_cache.insert (str.c_str (), str.size () + 1);
+ }
+
/* The storage has an obstack of its own. */
auto_obstack storage_obstack;
@@ -516,15 +533,14 @@ struct objfile
lifetime as the per-BFD object. */
const char *intern (const char *str)
{
- return (const char *) per_bfd->string_cache.insert (str, strlen (str) + 1);
+ return per_bfd->intern (str);
}
/* Intern STRING and return the unique copy. The copy has the same
lifetime as the per-BFD object. */
const char *intern (const std::string &str)
{
- return (const char *) per_bfd->string_cache.insert (str.c_str (),
- str.size () + 1);
+ return per_bfd->intern (str);
}
/* Retrieve the gdbarch associated with this objfile. */
--
2.30.1
next prev parent reply other threads:[~2021-04-02 15:38 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-22 19:34 [PATCH 0/4] Small Misc psymtabs / objfile cleanups Simon Marchi
2021-03-22 19:34 ` [PATCH 1/4] gdb: add intern method to objfile_per_bfd_storage Simon Marchi
2021-03-23 14:47 ` Christian Biesinger
2021-03-23 15:48 ` Simon Marchi
2021-03-23 15:53 ` Christian Biesinger
2021-03-23 16:08 ` Simon Marchi
2021-04-01 17:44 ` Tom Tromey
2021-04-02 15:38 ` Simon Marchi [this message]
2021-03-22 19:34 ` [PATCH 2/4] gdb: use std::string in partial_symtab::partial_symtab / allocate_symtab Simon Marchi
2021-04-01 17:43 ` Tom Tromey
2021-03-22 19:34 ` [PATCH 3/4] gdb: pass objfile_per_bfd_storage instead of objfile to partial_symtab Simon Marchi
2021-04-01 17:47 ` Tom Tromey
2021-04-02 15:42 ` Simon Marchi
2021-03-22 19:34 ` [PATCH 4/4] gdb: remove objfile parameter from get_objfile_bfd_data Simon Marchi
2021-04-01 17:52 ` Tom Tromey
2021-04-02 15:52 ` Simon Marchi
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