Subject: Debugging core dumps from Linux-emulated apps
To: None <firstname.lastname@example.org>
From: Brian de Alwis <email@example.com>
Date: 04/16/2007 10:38:52
I'm running a Linux app on NetBSD using the Linux emulation. The
app is dumping core, but the core dump is a NetBSD core:
$ file bin/java java.core
bin/java: ELF 32-bit LSB executable, Intel 80386, version 1 (SYSV), for GNU/Linux 2.2.5, dynamically linked (uses shared libs), stripped
java.core: ELF 32-bit LSB core file Intel 80386, version 1 (SYSV), NetBSD-style, from 'java' (signal 11)
(This is the jRockit JVM.)
I had thought gdb's bfd would DTRT (and tried the version from
pkgsrc), but it complains that it wasn't compiled with a Linux ABI.
This GDB was configured as "i386--netbsdelf"...
warning: A handler for the OS ABI "GNU/Linux" is not built into this configuration
And using a Linux GDB produces the same warning but for the NetBSD ABI.
And a quick peek didn't show me anything obvious to enable it.
Is it possible? Has anybody done this?
(ktrace/ktruss doesn't show anything obvious.)
Brian de Alwis | Software Practices Lab | UBC | http://www.cs.ubc.ca/~bsd/
"Amusement to an observing mind is study." - Benjamin Disraeli