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Operating Systems HP-UX Program crashes with optimization level O2 Post 302131912 by Yuriy07 on Tuesday 14th of August 2007 09:52:21 AM
Old 08-14-2007
Quote:
Originally Posted by porter
Often optimizations are incompatible with debuggers because optimizers will re-organize variables on the stack for efficiency, um, basically optimizing the thing.

Optimizers are more aggressive and less forgiving of dodgy code.

Also, if you are using C++ libraries, have these been built with the same optimizations?


Use maximum warning and errors during compilation, for HPUX compilers I use "-Aa -D_HPUX_SOURCE +e +We".

Try GCC and see if that exposes anything, again use "-Wall -Werror".
Thank you, porter!

I tried -Aa option. The code won't compile, it complains about the inline statements we have in our code. Apparently, there's a reason why the -AA flag is used. All libraries are built with the same options.

It's weird to see that -g option is not compatible with -O (a typical optimization option).

The aCC man page says that +O2 optimization option is the same as +O1 optimization plus global optimization. What the "global optimization" means in this case? Are there any specific things I have to check in my code for that cause the crash with +O2 option, but not +O1?


Thank you in advance.
 

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showmount(1M)						  System Administration Commands					     showmount(1M)

NAME
showmount - show remote mounts SYNOPSIS
/usr/sbin/showmount [-ade] [hostname] DESCRIPTION
showmount lists the clients that have remotely mounted a filesystem from host. This information is maintained by the mountd(1M) server on host, and is saved across crashes in the file /etc/rmtab. The default value for host is the value returned by hostname(1). The showmount command does not display the names of NFS Version 4 clients. OPTIONS
-a Print all remote mounts in the format: hostname : directory where hostname is the name of the client, and directory is the root of the file system that has been mounted. -d List directories that have been remotely mounted by clients. -e Print the list of shared file systems. FILES
/etc/rmtab ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWnfscu | +-----------------------------+-----------------------------+ SEE ALSO
hostname(1), mountd(1M), attributes(5) Solaris 10 Installation Guide: Basic Installations BUGS
If a client crashes, its entry will not be removed from the list of remote mounts on the server. SunOS 5.10 26 Oct 2004 showmount(1M)
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