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| author | Scott Lystig Fritchie <[email protected]> | 2012-08-17 03:24:20 -0500 |
|---|---|---|
| committer | Scott Lystig Fritchie <[email protected]> | 2012-08-17 04:39:36 -0500 |
| commit | 75552bd3bb4e7f3cf4dab81a5c81cf73b1d3fb99 (patch) | |
| tree | 58b9fbc507fbfe46aeee2311e7f308e8b70d7abf /README.bootstrap | |
| parent | f3c830eddc68d7269d4f48b13ddae40893929573 (diff) | |
| download | otp-75552bd3bb4e7f3cf4dab81a5c81cf73b1d3fb99.tar.gz otp-75552bd3bb4e7f3cf4dab81a5c81cf73b1d3fb99.tar.bz2 otp-75552bd3bb4e7f3cf4dab81a5c81cf73b1d3fb99.zip | |
Relocate bodies of DTrace probes to the statically-linked VM.
Due to various operating systems (in both the DTrace and SystemTap
worlds) not fully supporting DTrace probes (or SystemTap-compatibility
mode probes) in shared libraries, we relocate those probes to the
statically-linked virtual machine. This could be seen as pollution
of the pristine VM by a (yet) experimental feature. However:
1. This code can be eliminated completely by the C preprocessor.
2. Leaving the probes in the dyntrace NIF shared library simply
does not work correctly on too many platforms.
*Many* thanks to Macneil Shonle at Basho for assisting when my
RSI-injured fingers gave out.
Tested on:
* CentOS 5, SystemTap 1.3
* Solaris 10 (note)
* Solaris 11
* OpenIndiana 151
* SmartOS 20120809T221258Z
* FreeBSD 9.0-RELEASE (note)
I had hoped to be able to test CentOS 6 + SystemTap 1.7, but the
details of dealing with all dependencies for a 2.6.32-279.5.1.el6.x86_64
kernel are too time consuming right now.
(note: Solaris 10 and FreeBSD 9.0-RELEASE can take a long time to compile)
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