svn commit: r249884 - head/cddl/contrib/opensolaris/lib/libdtrace/common
Andriy Gapon
avg at FreeBSD.org
Thu Apr 25 07:04:57 UTC 2013
Author: avg
Date: Thu Apr 25 07:04:56 2013
New Revision: 249884
URL: http://svnweb.freebsd.org/changeset/base/249884
Log:
revert r248644 because of the regression for usdt probes
USDT probes are advertised to kernel by initialization code with
atrribute((constructor))). It seems that on Solaris the .init-ish code
of the main object is executed before RD_PREINIT point is hit. On
FreeBSD that is not the case. And because on FreeBSD there is no other
well-defined point between RD_PREINIT and main() we have to parse a
DTrace script when main is hit, for time being.
A footnote: currently we actually post RD_POSTINIT event, but that's a
bug because the event is triggered by hitting r_debug_state which
happens before any init code is executed.
Reported by: markj
Modified:
head/cddl/contrib/opensolaris/lib/libdtrace/common/dt_open.c
Modified: head/cddl/contrib/opensolaris/lib/libdtrace/common/dt_open.c
==============================================================================
--- head/cddl/contrib/opensolaris/lib/libdtrace/common/dt_open.c Thu Apr 25 06:55:57 2013 (r249883)
+++ head/cddl/contrib/opensolaris/lib/libdtrace/common/dt_open.c Thu Apr 25 07:04:56 2013 (r249884)
@@ -1130,7 +1130,7 @@ alloc:
#if defined(sun)
dtp->dt_prcmode = DT_PROC_STOP_PREINIT;
#else
- dtp->dt_prcmode = DT_PROC_STOP_POSTINIT;
+ dtp->dt_prcmode = DT_PROC_STOP_MAIN;
#endif
dtp->dt_linkmode = DT_LINK_KERNEL;
dtp->dt_linktype = DT_LTYP_ELF;
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