| Subject: | running ProcessTable in multi-thread environment |
Environment:
1. ProcessTable 0.35
2. Solaris 2.6, sun4u, sparc10
3. perl 5.6.1 sun4-solaris-thread-multi.
I am trying to use the Proc::ProcessTable module in a multi-threaded environemnt where each thread has one perl engine, and each perl engine executes a scipt which may access to Proc::ProcessTable module. (The perl engine is built with ithread and threads.)
1. readdir() in Solaris.c should be changed to readdir_r for multi-threaded apps (at least for Solaris).
2. From time to time, I got the following messages from stderr. The frequency of the 1st msg is much higher than that of the 2nd msg.
Attempt to free non-existent shared string at (eval 4) line 60.
Attempt to free non-existent shared string at /usr/netiq/UnixAgent/lib/perl5/site_perl/5.6.1/sun4-solaris-thread-multi/Proc/ProcessTable.pm line 118.
Line 60 in ProcessTable.pm is
$self->p{cache_ttys} = 1
in new(), and line 118 in ProcessTable.pm is
undef %Proc::ProcessTable::TTYDEVS;
in _get_tty_list().
3. Even with the fix of readdir_r(), I got core dump frequently.
3.1 I even serialized the invocation of OS_get_table by using a mutex, still got core dump.
3.2 The symbol PROC_FS is on for solaris 2.6. Even if I took out PROC_FS, still got core dump.
Did any one have experiences with running ProcessTable from a multi-threaded environment? Any hints and pointers would be appreciated.