svn commit: r268572 - in stable/10/sys/cddl/contrib/opensolaris/uts/common: dtrace sys
Pedro F. Giffuni
pfg at FreeBSD.org
Sat Jul 12 18:23:36 UTC 2014
Author: pfg
Date: Sat Jul 12 18:23:35 2014
New Revision: 268572
URL: http://svnweb.freebsd.org/changeset/base/268572
Log:
MFC r268130, r268224, r268230, r268231:
Various DTrace Merges from OpenSolaris/Illumos:
15-Sep-2008:
6735480 race between probe enabling and provider registration
20-Apr-2008:
6822482 DOF validation needs to handle loadable sections flagged as unloadable
22-Apr-2009:
6823388 DTrace ioctl handlers must validate all structure members
30-Jun-2009:
6851093 system drops to kmdb with anonymous dtrace probes + kmdb
Obtained from: OpenSolaris
Modified:
stable/10/sys/cddl/contrib/opensolaris/uts/common/dtrace/dtrace.c
stable/10/sys/cddl/contrib/opensolaris/uts/common/dtrace/fasttrap.c
stable/10/sys/cddl/contrib/opensolaris/uts/common/sys/dtrace.h
Directory Properties:
stable/10/ (props changed)
Modified: stable/10/sys/cddl/contrib/opensolaris/uts/common/dtrace/dtrace.c
==============================================================================
--- stable/10/sys/cddl/contrib/opensolaris/uts/common/dtrace/dtrace.c Sat Jul 12 17:39:13 2014 (r268571)
+++ stable/10/sys/cddl/contrib/opensolaris/uts/common/dtrace/dtrace.c Sat Jul 12 18:23:35 2014 (r268572)
@@ -27,8 +27,6 @@
* Copyright (c) 2012 by Delphix. All rights reserved.
*/
-#pragma ident "%Z%%M% %I% %E% SMI"
-
/*
* DTrace - Dynamic Tracing for Solaris
*
@@ -233,6 +231,7 @@ static dtrace_ecb_t *dtrace_ecb_create_c
static dtrace_genid_t dtrace_probegen; /* current probe generation */
static dtrace_helpers_t *dtrace_deferred_pid; /* deferred helper list */
static dtrace_enabling_t *dtrace_retained; /* list of retained enablings */
+static dtrace_genid_t dtrace_retained_gen; /* current retained enab gen */
static dtrace_dynvar_t dtrace_dynhash_sink; /* end of dynamic hash chains */
#if !defined(sun)
static struct mtx dtrace_unr_mtx;
@@ -8854,7 +8853,7 @@ dtrace_difo_validate(dtrace_difo_t *dp,
break;
default:
- err += efunc(dp->dtdo_len - 1, "bad return size");
+ err += efunc(dp->dtdo_len - 1, "bad return size\n");
}
}
@@ -11467,6 +11466,7 @@ dtrace_enabling_destroy(dtrace_enabling_
ASSERT(enab->dten_vstate->dtvs_state != NULL);
ASSERT(enab->dten_vstate->dtvs_state->dts_nretained > 0);
enab->dten_vstate->dtvs_state->dts_nretained--;
+ dtrace_retained_gen++;
}
if (enab->dten_prev == NULL) {
@@ -11509,6 +11509,7 @@ dtrace_enabling_retain(dtrace_enabling_t
return (ENOSPC);
state->dts_nretained++;
+ dtrace_retained_gen++;
if (dtrace_retained == NULL) {
dtrace_retained = enab;
@@ -11751,6 +11752,7 @@ dtrace_enabling_provide(dtrace_provider_
{
int i, all = 0;
dtrace_probedesc_t desc;
+ dtrace_genid_t gen;
ASSERT(MUTEX_HELD(&dtrace_lock));
ASSERT(MUTEX_HELD(&dtrace_provider_lock));
@@ -11761,15 +11763,25 @@ dtrace_enabling_provide(dtrace_provider_
}
do {
- dtrace_enabling_t *enab = dtrace_retained;
+ dtrace_enabling_t *enab;
void *parg = prv->dtpv_arg;
- for (; enab != NULL; enab = enab->dten_next) {
+retry:
+ gen = dtrace_retained_gen;
+ for (enab = dtrace_retained; enab != NULL;
+ enab = enab->dten_next) {
for (i = 0; i < enab->dten_ndesc; i++) {
desc = enab->dten_desc[i]->dted_probe;
mutex_exit(&dtrace_lock);
prv->dtpv_pops.dtps_provide(parg, &desc);
mutex_enter(&dtrace_lock);
+ /*
+ * Process the retained enablings again if
+ * they have changed while we weren't holding
+ * dtrace_lock.
+ */
+ if (gen != dtrace_retained_gen)
+ goto retry;
}
}
} while (all && (prv = prv->dtpv_next) != NULL);
@@ -11970,7 +11982,8 @@ dtrace_dof_copyin(uintptr_t uarg, int *e
dof = kmem_alloc(hdr.dofh_loadsz, KM_SLEEP);
- if (copyin((void *)uarg, dof, hdr.dofh_loadsz) != 0) {
+ if (copyin((void *)uarg, dof, hdr.dofh_loadsz) != 0 ||
+ dof->dofh_loadsz != hdr.dofh_loadsz) {
kmem_free(dof, hdr.dofh_loadsz);
*errp = EFAULT;
return (NULL);
@@ -12780,6 +12793,13 @@ dtrace_dof_slurp(dof_hdr_t *dof, dtrace_
}
}
+ if (DOF_SEC_ISLOADABLE(sec->dofs_type) &&
+ !(sec->dofs_flags & DOF_SECF_LOAD)) {
+ dtrace_dof_error(dof, "loadable section with load "
+ "flag unset");
+ return (-1);
+ }
+
if (!(sec->dofs_flags & DOF_SECF_LOAD))
continue; /* just ignore non-loadable sections */
@@ -15778,7 +15798,7 @@ dtrace_open(struct cdev *dev, int oflags
if (state == NULL) {
#if defined(sun)
- if (--dtrace_opens == 0)
+ if (--dtrace_opens == 0 && dtrace_anon.dta_enabling == NULL)
(void) kdi_dtrace_set(KDI_DTSET_DTRACE_DEACTIVATE);
#else
--dtrace_opens;
@@ -15855,7 +15875,11 @@ dtrace_dtr(void *data)
ASSERT(dtrace_opens > 0);
#if defined(sun)
- if (--dtrace_opens == 0)
+ /*
+ * Only relinquish control of the kernel debugger interface when there
+ * are no consumers and no anonymous enablings.
+ */
+ if (--dtrace_opens == 0 && dtrace_anon.dta_enabling == NULL)
(void) kdi_dtrace_set(KDI_DTSET_DTRACE_DEACTIVATE);
#else
--dtrace_opens;
Modified: stable/10/sys/cddl/contrib/opensolaris/uts/common/dtrace/fasttrap.c
==============================================================================
--- stable/10/sys/cddl/contrib/opensolaris/uts/common/dtrace/fasttrap.c Sat Jul 12 17:39:13 2014 (r268571)
+++ stable/10/sys/cddl/contrib/opensolaris/uts/common/dtrace/fasttrap.c Sat Jul 12 18:23:35 2014 (r268572)
@@ -2089,7 +2089,8 @@ fasttrap_ioctl(struct cdev *dev, u_long
probe = kmem_alloc(size, KM_SLEEP);
- if (copyin(uprobe, probe, size) != 0) {
+ if (copyin(uprobe, probe, size) != 0 ||
+ probe->ftps_noffs != noffs) {
kmem_free(probe, size);
return (EFAULT);
}
Modified: stable/10/sys/cddl/contrib/opensolaris/uts/common/sys/dtrace.h
==============================================================================
--- stable/10/sys/cddl/contrib/opensolaris/uts/common/sys/dtrace.h Sat Jul 12 17:39:13 2014 (r268571)
+++ stable/10/sys/cddl/contrib/opensolaris/uts/common/sys/dtrace.h Sat Jul 12 18:23:35 2014 (r268572)
@@ -723,6 +723,20 @@ typedef struct dof_sec {
#define DOF_SECF_LOAD 1 /* section should be loaded */
+#define DOF_SEC_ISLOADABLE(x) \
+ (((x) == DOF_SECT_ECBDESC) || ((x) == DOF_SECT_PROBEDESC) || \
+ ((x) == DOF_SECT_ACTDESC) || ((x) == DOF_SECT_DIFOHDR) || \
+ ((x) == DOF_SECT_DIF) || ((x) == DOF_SECT_STRTAB) || \
+ ((x) == DOF_SECT_VARTAB) || ((x) == DOF_SECT_RELTAB) || \
+ ((x) == DOF_SECT_TYPTAB) || ((x) == DOF_SECT_URELHDR) || \
+ ((x) == DOF_SECT_KRELHDR) || ((x) == DOF_SECT_OPTDESC) || \
+ ((x) == DOF_SECT_PROVIDER) || ((x) == DOF_SECT_PROBES) || \
+ ((x) == DOF_SECT_PRARGS) || ((x) == DOF_SECT_PROFFS) || \
+ ((x) == DOF_SECT_INTTAB) || ((x) == DOF_SECT_XLTAB) || \
+ ((x) == DOF_SECT_XLMEMBERS) || ((x) == DOF_SECT_XLIMPORT) || \
+ ((x) == DOF_SECT_XLIMPORT) || ((x) == DOF_SECT_XLEXPORT) || \
+ ((x) == DOF_SECT_PREXPORT) || ((x) == DOF_SECT_PRENOFFS))
+
typedef struct dof_ecbdesc {
dof_secidx_t dofe_probes; /* link to DOF_SECT_PROBEDESC */
dof_secidx_t dofe_pred; /* link to DOF_SECT_DIFOHDR */
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