** Description changed:
- After upgrading gdb from 8.1-0ubuntu3 to 8.1-0ubuntu3.1, gdb does not
- stop on breakpoint when running a 32-bit application (on 64-bit Ubuntu).
+ [Impact]
+ After upgrading gdb from 8.1-0ubuntu3 to 8.1-0ubuntu3.1, gdb does not stop
+ on breakpoint when running a 32-bit application (on 64-bit Ubuntu).
+
+ [Test Case]
This can be reproduced with a simple “hello world” program:
- $ cat hello.c
+ $ cat hello.c
#include <stdio.h>
int main()
{
- // printf() displays the string inside quotation
- printf("Hello, World!");
- return 0;
+ // printf() displays the string inside quotation
+ printf("Hello, World!");
+ return 0;
}
$ gcc -ggdb -m32 hello.c
$ gdb a.out
(gdb) b hello.c:5
Breakpoint 1 at 0x536: file hello.c, line 5.
(gdb) run
- Starting program: /home/user/sandbox/a.out
+ Starting program: /home/user/sandbox/a.out
warning: Breakpoint address adjusted from 0xf7fd9be0 to 0xfffffffff7fd9be0.
warning: Breakpoint address adjusted from 0xf7fda195 to 0xfffffffff7fda195.
warning: Breakpoint address adjusted from 0xf7fdbd1c to 0xfffffffff7fdbd1c.
warning: Breakpoint address adjusted from 0xf7fdb924 to 0xfffffffff7fdb924.
warning: Breakpoint address adjusted from 0xf7fe99b3 to 0xfffffffff7fe99b3.
warning: Breakpoint address adjusted from 0xf7fea401 to 0xfffffffff7fea401.
warning: Breakpoint address adjusted from 0xf7fea706 to 0xfffffffff7fea706.
--- (and not stopping nor outputting the text…) ---
- It works well with a 64-bit build (leaving out the gcc’s -m32 option).
+ [Regression Risk]
+ Test case ran on arm64 and regression tested on amd64/i386.
- This problem has been already discussed on:
- https://stackoverflow.com/questions/58225562/how-to-fix-hang-in-gdb-in-
- ld-linux-so-2-when-running-a-32-bit-executable-on-a-64
-
- ProblemType: Bug
- DistroRelease: Ubuntu 18.04
- Package: gdb 8.1-0ubuntu3.1
- ProcVersionSignature: Ubuntu 4.15.0-65.74-generic 4.15.18
- Uname: Linux 4.15.0-65-generic x86_64
- ApportVersion: 2.20.9-0ubuntu7.7
- Architecture: amd64
- CurrentDesktop: XFCE
- Date: Tue Oct 15 14:37:37 2019
- InstallationDate: Installed on 2015-12-08 (1407 days ago)
- InstallationMedia: Ubuntu-Server 14.04.3 LTS "Trusty Tahr" - Beta amd64
(20150805)
- SourcePackage: gdb
- UpgradeStatus: Upgraded to bionic on 2019-06-10 (127 days ago)
+ This regression was fixed on the upstream gdb-8.1 branch within a few
+ weeks of the breakage back in May 2018. Since then there have been no
+ other fixes in this area on that branch, implying this fixed the issue
+ and there were no further regressions discovered.
--
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1848200
Title:
gdb not stopping on breakpoint in a 32-bit program
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/gdb/+bug/1848200/+subscriptions
--
ubuntu-bugs mailing list
[email protected]
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
