svn commit: r312893 - head/sys/cddl/contrib/opensolaris/uts/intel/dtrace

[Mark Johnston]

Author: markj
Date: Fri Jan 27 17:58:41 2017
New Revision: 312893
URL: https://svnweb.freebsd.org/changeset/base/312893

Log:
  Fix an off-by-one in an assertion on fasttrap tracepoint sizes.
  
  FASTTRAP_MAX_INSTR_SIZE is the largest valid value of a tracepoint, so
  correct the assertion accordingly. This limit was hit with a 15-byte NOP.
  
  Reported by:	bdrewery
  MFC after:	1 week
  Sponsored by:	Dell EMC Isilon

Modified:
  head/sys/cddl/contrib/opensolaris/uts/intel/dtrace/fasttrap_isa.c

Modified: head/sys/cddl/contrib/opensolaris/uts/intel/dtrace/fasttrap_isa.c
==============================================================================
--- head/sys/cddl/contrib/opensolaris/uts/intel/dtrace/fasttrap_isa.c	Fri Jan 27 17:54:24 2017	(r312892)
+++ head/sys/cddl/contrib/opensolaris/uts/intel/dtrace/fasttrap_isa.c	Fri Jan 27 17:58:41 2017	(r312893)
@@ -1616,7 +1616,7 @@ fasttrap_pid_probe(struct reg *rp)
 		 * a signal we can reset the value of the scratch register.
 		 */
 
-		ASSERT(tp->ftt_size < FASTTRAP_MAX_INSTR_SIZE);
+		ASSERT(tp->ftt_size <= FASTTRAP_MAX_INSTR_SIZE);
 
 		curthread->t_dtrace_scrpc = addr;
 		bcopy(tp->ftt_instr, &scratch[i], tp->ftt_size);