X-Git-Url: https://perl5.git.perl.org/perl5.git/blobdiff_plain/74bd860d3d65439897565e0bbbf8a8786ffaf5f3..09187cb170014b7d158b84fa92795ed1ad2ae0d7:/pod/perlhack.pod

diff --git a/pod/perlhack.pod b/pod/perlhack.pod
index 1959680..1f398a4 100644
--- a/pod/perlhack.pod
+++ b/pod/perlhack.pod
@@ -1674,6 +1674,24 @@ standard Perl testset you would create and run Purify as:
 which would instrument Perl in memory, run Perl on test.pl,
 then finally report any memory problems.
 
+=head2 Compaq's/Digital's Third Degree
+
+Third Degree is a tool for memory leak detection and memory access checks.
+It is one of the many tools in the ATOM toolkit.  The toolkit is only
+available on Tru64 (formerly known as Digital UNIX formerly known as
+DEC OSF/1).
+
+When building Perl, you must first run Configure with -Doptimize=-g
+and -Uusemymalloc flags, after that you can use the make targets
+
+"perl.third" and "test.third".  The short story is that with "atom"
+you can instrument the Perl executable to create a new executable
+called "perl.third."  When the instrumented executable is run, it
+creates a log of dubious memory traffic in file called "perl.3log".
+See man atom and man third for more information.  The most extensive
+Third Degree documentation is available in the Compaq "Tru64 UNIX
+Programmer's Guide", chapter "Debugging Programs with Third Degree".
+
 =head2 CONCLUSION
 
 We've had a brief look around the Perl source, an overview of the stages