From: Tom Tromey <tom@tromey.com>
To: gdb-patches@sourceware.org
Cc: Tom Tromey <tom@tromey.com>
Subject: [RFA 1/6] Change reopen_exec_file to check result of stat
Date: Mon, 06 Jun 2016 21:34:00 -0000 [thread overview]
Message-ID: <1465248812-23902-2-git-send-email-tom@tromey.com> (raw)
In-Reply-To: <1465248812-23902-1-git-send-email-tom@tromey.com>
This seems to be a real bug found by -Wunused-but-set-variable. If
"stat" fails for some reason, gdb would use the uninitialized "st".
2016-06-06 Tom Tromey <tom@tromey.com>
* corefile.c (reopen_exec_file): Only examine st.st_mtime if stat
succeeded.
---
gdb/ChangeLog | 5 +++++
gdb/corefile.c | 2 +-
2 files changed, 6 insertions(+), 1 deletion(-)
diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index af4ddcc..649bb0b 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,8 @@
+2016-06-06 Tom Tromey <tom@tromey.com>
+
+ * corefile.c (reopen_exec_file): Only examine st.st_mtime if stat
+ succeeded.
+
2016-06-02 Jon Turney <jon.turney@dronecode.org.uk>
* windows-nat.c (handle_output_debug_string): Return type of
diff --git a/gdb/corefile.c b/gdb/corefile.c
index 6cc2afc..64de931 100644
--- a/gdb/corefile.c
+++ b/gdb/corefile.c
@@ -144,7 +144,7 @@ reopen_exec_file (void)
cleanups = make_cleanup (xfree, filename);
res = stat (filename, &st);
- if (exec_bfd_mtime && exec_bfd_mtime != st.st_mtime)
+ if (res == 0 && exec_bfd_mtime && exec_bfd_mtime != st.st_mtime)
exec_file_attach (filename, 0);
else
/* If we accessed the file since last opening it, close it now;
--
2.5.5
next prev parent reply other threads:[~2016-06-06 21:34 UTC|newest]
Thread overview: 50+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-06-06 21:34 [RFA 0/6] Add -Wunused-but-set-parameter and -Wunused-but-set-variable Tom Tromey
2016-06-06 21:34 ` [RFA 4/6] Remove some variables but call functions for side effects Tom Tromey
2016-06-28 14:41 ` Yao Qi
2016-06-06 21:34 ` [RFA 6/6] Add -Wunused-but-set-* to build Tom Tromey
2016-06-08 2:30 ` Trevor Saunders
2016-06-08 2:46 ` Tom Tromey
2016-06-08 3:18 ` Trevor Saunders
2016-06-08 3:43 ` Tom Tromey
2016-06-08 4:16 ` Tom Tromey
2016-06-08 4:26 ` Trevor Saunders
2016-06-06 21:34 ` [RFA 2/6] Use ATTRIBUTE_UNUSED in some places Tom Tromey
2016-06-28 18:26 ` Pedro Alves
2016-06-28 20:58 ` Tom Tromey
2016-06-29 9:50 ` Pedro Alves
2016-06-06 21:34 ` [RFA 3/6] Comment out some unused overlay code Tom Tromey
2016-06-28 14:36 ` Yao Qi
2016-06-28 20:56 ` Tom Tromey
2016-06-29 8:51 ` Yao Qi
2016-06-06 21:34 ` Tom Tromey [this message]
2016-06-28 14:21 ` [RFA 1/6] Change reopen_exec_file to check result of stat Yao Qi
2016-06-06 21:34 ` [RFA 5/6] Remove unused variables Tom Tromey
2016-06-28 14:50 ` Yao Qi
2016-06-28 20:57 ` Tom Tromey
2016-06-29 8:50 ` Yao Qi
2016-07-13 20:43 ` Tom Tromey
2016-07-14 7:30 ` Yao Qi
2016-07-20 18:37 ` Maciej W. Rozycki
2016-07-20 18:46 ` Paul_Koning
2016-07-21 23:41 ` Maciej W. Rozycki
2016-07-20 19:49 ` Tom Tromey
2016-07-25 13:36 ` Maciej W. Rozycki
2016-06-28 15:02 ` [RFA 0/6] Add -Wunused-but-set-parameter and -Wunused-but-set-variable Yao Qi
2016-07-12 17:07 ` Tom Tromey
2016-07-13 13:45 ` Yao Qi
2016-07-14 16:49 ` Tom Tromey
2016-07-21 10:38 ` Pedro Alves
2016-07-21 11:10 ` Yao Qi
2016-07-21 11:35 ` Pedro Alves
2016-07-21 11:38 ` [PATCH 1/2] Remove unused variable in gdb/varobj.c when built without Python support Pedro Alves
2016-07-21 14:01 ` Yao Qi
2016-07-21 14:31 ` Pedro Alves
2016-07-21 11:38 ` [PATCH 2/2] Remove unused variable in windows-nat.c Pedro Alves
2016-07-21 14:03 ` Yao Qi
2016-07-21 14:31 ` Pedro Alves
2016-07-21 11:56 ` [RFA 0/6] Add -Wunused-but-set-parameter and -Wunused-but-set-variable Pedro Alves
2016-07-21 12:16 ` Pedro Alves
2016-07-21 14:47 ` Pedro Alves
2016-07-21 15:18 ` Pedro Alves
2016-07-21 16:38 ` Yao Qi
2016-07-21 19:22 ` Tom Tromey
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1465248812-23902-2-git-send-email-tom@tromey.com \
--to=tom@tromey.com \
--cc=gdb-patches@sourceware.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).