Section: Misc. Reference Manual Pages (7stap)
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error::pass4 - systemtap pass-4 errors
Errors that occur during pass 4 (compilation) have generally only a few
- kernel or OS version changes
The systemtap runtime and embedded-C fragments in the tapset library
are designed to be portable across a wide range of OS versions. However,
incompatibilities can occur when some OS changes occur, such as kernel
modifications that change functions, types, or macros referenced
by systemtap. Upstream (git://sourceware.org/git/systemtap.git) builds
of systemtap are often quickly updated to include relevant fixes, so try
getting or making an updated build.
If the issue persists, report the problem to the systemtap developers.
- buggy embedded-C code
Embedded-C code in your own guru-mode script cannot be checked by systemtap,
and is passed through verbatim to the compiler. Errors in such snippets of
code may be found during the pass-4 compiler invocation, though may be hard
to identify by the compiler errors.
- incompatible embedded-C code
The interface standards between systemtap-generated code and embedded-C code
occasionally change. For example, before version 1.8, arguments were passed
THIS->foo and THIS->__retvalue
but from version 1.8 onward, using
STAP_ARG_foo and STAP_RETVALUE.
Adjust your embedded-C code to current standards, or use the
option to make systemtap use a different one.
GATHERING MORE INFORMATION
It may be necessary to run systemtap with
-k or -p3
to examine the generated C code. Increasing the verbosity of pass-4
with an option such as
can also help pinpoint the problem.
- GATHERING MORE INFORMATION
- SEE ALSO
This document was created by
using the manual pages.
Time: 23:19:57 GMT, August 08, 2014