Import newer versions of these files from a 20080410 checkout of

OpenSolaris.  Our local diffs to these files in HEAD already contain all
these changes (and in fact seem to be based on these versions of the files).
It seems the vendor branch just has older versions somehow.

1 files changed, 19 insertions, 48 deletions

diff --git a/uts/common/dtrace/dtrace.c b/uts/common/dtrace/dtrace.c
index 35971db..c721386 100644
--- a/uts/common/dtrace/dtrace.c
+++ b/uts/common/dtrace/dtrace.c
@@ -3607,15 +3607,15 @@ dtrace_dif_subr(uint_t subr, uint_t rd, uint64_t *regs,
 			break;
 		}
 
-		if (nargs <= 2)
-			remaining = (int64_t)size;
-
 		if (!DTRACE_INSCRATCH(mstate, size)) {
 			DTRACE_CPUFLAG_SET(CPU_DTRACE_NOSCRATCH);
 			regs[rd] = NULL;
 			break;
 		}
 
+		if (nargs <= 2)
+			remaining = (int64_t)size;
+
 		if (index < 0) {
 			index += len;
 
@@ -3625,19 +3625,21 @@ dtrace_dif_subr(uint_t subr, uint_t rd, uint64_t *regs,
 			}
 		}
 
-		if (index >= len || index < 0)
-			index = len;
-
-		for (d[0] = '\0'; remaining > 0; remaining--) {
-			if ((d[i++] = dtrace_load8(s++ + index)) == '\0')
-				break;
+		if (index >= len || index < 0) {
+			remaining = 0;
+		} else if (remaining < 0) {
+			remaining += len - index;
+		} else if (index + remaining > size) {
+			remaining = size - index;
+		}
 
-			if (i == size) {
-				d[i - 1] = '\0';
+		for (i = 0; i < remaining; i++) {
+			if ((d[i] = dtrace_load8(s + index + i)) == '\0')
 				break;
-			}
 		}
 
+		d[i] = '\0';
+
 		mstate->dtms_scratch_ptr += size;
 		regs[rd] = (uintptr_t)d;
 		break;
@@ -3706,9 +3708,9 @@ dtrace_dif_subr(uint_t subr, uint_t rd, uint64_t *regs,
 		 * explained to them, and who can't even concisely describe
 		 * the conditions under which one would be forced to resort to
 		 * this technique.  Needless to say, those conditions are
-		 * found here -- and probably only here.  Is this is the only
-		 * use of this infamous trick in shipping, production code?
-		 * If it isn't, it probably should be...
+		 * found here -- and probably only here.  Is this the only use
+		 * of this infamous trick in shipping, production code?  If it
+		 * isn't, it probably should be...
 		 */
 		if (minor != -1) {
 			uintptr_t maddr = dtrace_loadptr(daddr +
@@ -10776,33 +10778,6 @@ dtrace_enabling_matchall(void)
 	mutex_exit(&cpu_lock);
 }
 
-static int
-dtrace_enabling_matchstate(dtrace_state_t *state, int *nmatched)
-{
-	dtrace_enabling_t *enab;
-	int matched, total = 0, err;
-
-	ASSERT(MUTEX_HELD(&cpu_lock));
-	ASSERT(MUTEX_HELD(&dtrace_lock));
-
-	for (enab = dtrace_retained; enab != NULL; enab = enab->dten_next) {
-		ASSERT(enab->dten_vstate->dtvs_state != NULL);
-
-		if (enab->dten_vstate->dtvs_state != state)
-			continue;
-
-		if ((err = dtrace_enabling_match(enab, &matched)) != 0)
-			return (err);
-
-		total += matched;
-	}
-
-	if (nmatched != NULL)
-		*nmatched = total;
-
-	return (0);
-}
-
 /*
  * If an enabling is to be enabled without having matched probes (that is, if
  * dtrace_state_go() is to be called on the underlying dtrace_state_t), the
@@ -14790,13 +14765,9 @@ dtrace_ioctl(dev_t dev, int cmd, intptr_t arg, int md, cred_t *cr, int *rv)
 		 * cue to reevaluate our enablings.
 		 */
 		if (arg == NULL) {
-			mutex_enter(&cpu_lock);
-			mutex_enter(&dtrace_lock);
-			err = dtrace_enabling_matchstate(state, rv);
-			mutex_exit(&dtrace_lock);
-			mutex_exit(&cpu_lock);
+			dtrace_enabling_matchall();
 
-			return (err);
+			return (0);
 		}
 
 		if ((dof = dtrace_dof_copyin(arg, &rval)) == NULL)