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-rw-r--r--usr/src/cmd/dtrace/test/pkg/SUNWdtrt/prototype_com4
-rw-r--r--usr/src/cmd/dtrace/test/tst/common/safety/tst.errno.d49
-rw-r--r--usr/src/cmd/dtrace/test/tst/common/safety/tst.gid.d49
-rw-r--r--usr/src/cmd/dtrace/test/tst/common/safety/tst.ppid.d49
-rw-r--r--usr/src/cmd/dtrace/test/tst/common/safety/tst.uid.d49
-rw-r--r--usr/src/uts/common/dtrace/dtrace.c34
6 files changed, 232 insertions, 2 deletions
diff --git a/usr/src/cmd/dtrace/test/pkg/SUNWdtrt/prototype_com b/usr/src/cmd/dtrace/test/pkg/SUNWdtrt/prototype_com
index 93b1b75ea9..a320f3b579 100644
--- a/usr/src/cmd/dtrace/test/pkg/SUNWdtrt/prototype_com
+++ b/usr/src/cmd/dtrace/test/pkg/SUNWdtrt/prototype_com
@@ -948,10 +948,13 @@ f none opt/SUNWdtrt/tst/common/safety/tst.cleanpath.d 0444 root bin
f none opt/SUNWdtrt/tst/common/safety/tst.copyin.d 0444 root bin
f none opt/SUNWdtrt/tst/common/safety/tst.ddi_pathname.d 0444 root bin
f none opt/SUNWdtrt/tst/common/safety/tst.dirname.d 0444 root bin
+f none opt/SUNWdtrt/tst/common/safety/tst.errno.d 0444 root bin
+f none opt/SUNWdtrt/tst/common/safety/tst.gid.d 0444 root bin
f none opt/SUNWdtrt/tst/common/safety/tst.index.d 0444 root bin
f none opt/SUNWdtrt/tst/common/safety/tst.msgdsize.d 0444 root bin
f none opt/SUNWdtrt/tst/common/safety/tst.msgsize.d 0444 root bin
f none opt/SUNWdtrt/tst/common/safety/tst.null.d 0444 root bin
+f none opt/SUNWdtrt/tst/common/safety/tst.ppid.d 0444 root bin
f none opt/SUNWdtrt/tst/common/safety/tst.progenyof.d 0444 root bin
f none opt/SUNWdtrt/tst/common/safety/tst.random.d 0444 root bin
f none opt/SUNWdtrt/tst/common/safety/tst.rw.d 0444 root bin
@@ -963,6 +966,7 @@ f none opt/SUNWdtrt/tst/common/safety/tst.strjoin.d 0444 root bin
f none opt/SUNWdtrt/tst/common/safety/tst.strstr.d 0444 root bin
f none opt/SUNWdtrt/tst/common/safety/tst.strtok.d 0444 root bin
f none opt/SUNWdtrt/tst/common/safety/tst.substr.d 0444 root bin
+f none opt/SUNWdtrt/tst/common/safety/tst.uid.d 0444 root bin
f none opt/SUNWdtrt/tst/common/safety/tst.unalign.d 0444 root bin
f none opt/SUNWdtrt/tst/common/safety/tst.uregs.d 0444 root bin
f none opt/SUNWdtrt/tst/common/safety/tst.ustack.d 0444 root bin
diff --git a/usr/src/cmd/dtrace/test/tst/common/safety/tst.errno.d b/usr/src/cmd/dtrace/test/tst/common/safety/tst.errno.d
new file mode 100644
index 0000000000..d3f238b79e
--- /dev/null
+++ b/usr/src/cmd/dtrace/test/tst/common/safety/tst.errno.d
@@ -0,0 +1,49 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+
+/*
+ * Copyright 2006 Sun Microsystems, Inc. All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#pragma ident "%Z%%M% %I% %E% SMI"
+
+/*
+ * ASSERTION:
+ * collect errno at every fbt probe and at every firing of a
+ * high-frequency profile probe
+ */
+
+fbt:::
+{
+ @a[errno] = count();
+}
+
+profile-4999hz
+{
+ @a[errno] = count();
+}
+
+tick-1sec
+/n++ == 10/
+{
+ exit(0);
+}
diff --git a/usr/src/cmd/dtrace/test/tst/common/safety/tst.gid.d b/usr/src/cmd/dtrace/test/tst/common/safety/tst.gid.d
new file mode 100644
index 0000000000..f8f90e7364
--- /dev/null
+++ b/usr/src/cmd/dtrace/test/tst/common/safety/tst.gid.d
@@ -0,0 +1,49 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+
+/*
+ * Copyright 2006 Sun Microsystems, Inc. All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#pragma ident "%Z%%M% %I% %E% SMI"
+
+/*
+ * ASSERTION:
+ * collect gid at every fbt probe and at every firing of a
+ * high-frequency profile probe
+ */
+
+fbt:::
+{
+ @a[gid] = count();
+}
+
+profile-4999hz
+{
+ @a[gid] = count();
+}
+
+tick-1sec
+/n++ == 10/
+{
+ exit(0);
+}
diff --git a/usr/src/cmd/dtrace/test/tst/common/safety/tst.ppid.d b/usr/src/cmd/dtrace/test/tst/common/safety/tst.ppid.d
new file mode 100644
index 0000000000..faf07dc482
--- /dev/null
+++ b/usr/src/cmd/dtrace/test/tst/common/safety/tst.ppid.d
@@ -0,0 +1,49 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+
+/*
+ * Copyright 2006 Sun Microsystems, Inc. All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#pragma ident "%Z%%M% %I% %E% SMI"
+
+/*
+ * ASSERTION:
+ * collect ppid at every fbt probe and at every firing of a
+ * high-frequency profile probe
+ */
+
+fbt:::
+{
+ @a[ppid] = count();
+}
+
+profile-4999hz
+{
+ @a[ppid] = count();
+}
+
+tick-1sec
+/n++ == 10/
+{
+ exit(0);
+}
diff --git a/usr/src/cmd/dtrace/test/tst/common/safety/tst.uid.d b/usr/src/cmd/dtrace/test/tst/common/safety/tst.uid.d
new file mode 100644
index 0000000000..b546457e78
--- /dev/null
+++ b/usr/src/cmd/dtrace/test/tst/common/safety/tst.uid.d
@@ -0,0 +1,49 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+
+/*
+ * Copyright 2006 Sun Microsystems, Inc. All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#pragma ident "%Z%%M% %I% %E% SMI"
+
+/*
+ * ASSERTION:
+ * collect uid at every fbt probe and at every firing of a
+ * high-frequency profile probe
+ */
+
+fbt:::
+{
+ @a[uid] = count();
+}
+
+profile-4999hz
+{
+ @a[uid] = count();
+}
+
+tick-1sec
+/n++ == 10/
+{
+ exit(0);
+}
diff --git a/usr/src/uts/common/dtrace/dtrace.c b/usr/src/uts/common/dtrace/dtrace.c
index 1e8e7fdb97..c7f655adde 100644
--- a/usr/src/uts/common/dtrace/dtrace.c
+++ b/usr/src/uts/common/dtrace/dtrace.c
@@ -2494,6 +2494,12 @@ dtrace_dif_variable(dtrace_mstate_t *mstate, dtrace_state_t *state, uint64_t v,
if (DTRACE_ANCHORED(mstate->dtms_probe) && CPU_ON_INTR(CPU))
return (pid0.pid_id);
+ /*
+ * It is always safe to dereference one's own t_procp pointer:
+ * it always points to a valid, allocated proc structure.
+ * (This is true because threads don't clean up their own
+ * state -- they leave that task to whomever reaps them.)
+ */
return ((uint64_t)curthread->t_procp->p_ppid);
case DIF_VAR_TID:
@@ -2553,7 +2559,16 @@ dtrace_dif_variable(dtrace_mstate_t *mstate, dtrace_state_t *state, uint64_t v,
if (DTRACE_ANCHORED(mstate->dtms_probe) && CPU_ON_INTR(CPU))
return ((uint64_t)p0.p_cred->cr_uid);
- return ((uint64_t)curthread->t_cred->cr_uid);
+ /*
+ * It is always safe to dereference one's own t_procp pointer:
+ * it always points to a valid, allocated proc structure.
+ * (This is true because threads don't clean up their own
+ * state -- they leave that task to whomever reaps them.)
+ *
+ * Additionally, it is safe to dereference one's own process
+ * credential, since this is never NULL after process birth.
+ */
+ return ((uint64_t)curthread->t_procp->p_cred->cr_uid);
case DIF_VAR_GID:
if (!dtrace_priv_proc(state))
@@ -2565,7 +2580,16 @@ dtrace_dif_variable(dtrace_mstate_t *mstate, dtrace_state_t *state, uint64_t v,
if (DTRACE_ANCHORED(mstate->dtms_probe) && CPU_ON_INTR(CPU))
return ((uint64_t)p0.p_cred->cr_gid);
- return ((uint64_t)curthread->t_cred->cr_gid);
+ /*
+ * It is always safe to dereference one's own t_procp pointer:
+ * it always points to a valid, allocated proc structure.
+ * (This is true because threads don't clean up their own
+ * state -- they leave that task to whomever reaps them.)
+ *
+ * Additionally, it is safe to dereference one's own process
+ * credential, since this is never NULL after process birth.
+ */
+ return ((uint64_t)curthread->t_procp->p_cred->cr_gid);
case DIF_VAR_ERRNO: {
klwp_t *lwp;
@@ -2578,6 +2602,12 @@ dtrace_dif_variable(dtrace_mstate_t *mstate, dtrace_state_t *state, uint64_t v,
if (DTRACE_ANCHORED(mstate->dtms_probe) && CPU_ON_INTR(CPU))
return (0);
+ /*
+ * It is always safe to dereference one's own t_lwp pointer in
+ * the event that this pointer is non-NULL. (This is true
+ * because threads and lwps don't clean up their own state --
+ * they leave that task to whomever reaps them.)
+ */
if ((lwp = curthread->t_lwp) == NULL)
return (0);
generated by cgit v1.2.3 (git 2.39.1) at 2025-06-04 15:45:44 +0000