[libvirt] [PATCH 07/26] virsh: Resolve Coverity DEADCODE
John Ferlan
jferlan at redhat.com
Thu Sep 4 22:26:15 UTC 2014
Since 0766783abbe8bbc9ea686c2c3149f4c0ac139e19
Coverity complains that the EDIT_FREE definition results in DEADCODE.
As it turns out with the change to use the EDIT_FREE macro the call to
vir*Free() wouldn't be necessary nor would it happen...
Prior code to above commitid would :
vir*Ptr foo = NULL;
...
foo = vir*GetXMLDesc()
...
vir*Free(foo);
foo = vir*DefineXML()
...
And thus the free was needed. With the change to use EDIT_FREE the
same code changed to:
vir*Ptr foo = NULL;
vir*Ptr foo_edited = NULL;
...
foo = vir*GetXMLDesc()
...
if (foo_edited)
vir*Free(foo_edited);
foo_edited = vir*DefineXML()
...
However, foo_edited could never be set in the code path - even with
all the goto's since the only way for it to be set is if vir*DefineXML()
succeeds in which case the code to allow a retry (and thus all the goto's)
never leaves foo_edited set
All error paths lead to "cleanup:" which causes both foo and foo_edited
to call the respective vir*Free() routines if set.
Signed-off-by: John Ferlan <jferlan at redhat.com>
---
tools/virsh-domain.c | 5 -----
tools/virsh-edit.c | 9 ---------
tools/virsh-interface.c | 3 ---
tools/virsh-network.c | 3 ---
tools/virsh-nwfilter.c | 3 ---
tools/virsh-pool.c | 3 ---
tools/virsh-snapshot.c | 3 ---
7 files changed, 29 deletions(-)
diff --git a/tools/virsh-domain.c b/tools/virsh-domain.c
index 68d49d6..1cdb596 100644
--- a/tools/virsh-domain.c
+++ b/tools/virsh-domain.c
@@ -4032,7 +4032,6 @@ cmdSaveImageEdit(vshControl *ctl, const vshCmd *cmd)
ret = true; goto edit_cleanup;
#define EDIT_DEFINE \
(virDomainSaveImageDefineXML(ctl->conn, file, doc_edited, define_flags) == 0)
-#define EDIT_FREE /* */
#include "virsh-edit.c"
vshPrint(ctl, _("State file %s edited.\n"), file);
@@ -7162,7 +7161,6 @@ cmdMetadata(vshControl *ctl, const vshCmd *cmd)
#define EDIT_DEFINE \
(virDomainSetMetadata(dom, VIR_DOMAIN_METADATA_ELEMENT, doc_edited, \
key, uri, flags) == 0)
-#define EDIT_FREE /* nothing */
#include "virsh-edit.c"
vshPrint("%s\n", _("Metadata modified"));
@@ -10656,9 +10654,6 @@ cmdEdit(vshControl *ctl, const vshCmd *cmd)
ret = true; goto edit_cleanup;
#define EDIT_DEFINE \
(dom_edited = virDomainDefineXML(ctl->conn, doc_edited))
-#define EDIT_FREE \
- if (dom_edited) \
- virDomainFree(dom_edited);
#include "virsh-edit.c"
vshPrint(ctl, _("Domain %s XML configuration edited.\n"),
diff --git a/tools/virsh-edit.c b/tools/virsh-edit.c
index 5d35c55..10298f6 100644
--- a/tools/virsh-edit.c
+++ b/tools/virsh-edit.c
@@ -40,9 +40,6 @@
* For example:
* #define EDIT_DEFINE (dom_edited = virDomainDefineXML(ctl->conn, doc_edited))
*
- * EDIT_FREE - statement which vir*Free()-s object defined by EDIT_DEFINE, e.g:
- * #define EDIT_FREE if (dom_edited) virDomainFree(dom_edited);
- *
* Michal Privoznik <mprivozn at redhat.com>
*/
@@ -58,10 +55,6 @@
# error Missing EDIT_DEFINE definition
#endif
-#ifndef EDIT_FREE
-# error Missing EDIT_FREE definition
-#endif
-
do {
char *tmp = NULL;
char *doc = NULL;
@@ -116,7 +109,6 @@ do {
}
/* Everything checks out, so redefine the object. */
- EDIT_FREE;
if (!msg && !(EDIT_DEFINE)) {
msg = _("Failed.");
}
@@ -162,4 +154,3 @@ do {
#undef EDIT_GET_XML
#undef EDIT_NOT_CHANGED
#undef EDIT_DEFINE
-#undef EDIT_FREE
diff --git a/tools/virsh-interface.c b/tools/virsh-interface.c
index d4ec854..6cacaf1 100644
--- a/tools/virsh-interface.c
+++ b/tools/virsh-interface.c
@@ -128,9 +128,6 @@ cmdInterfaceEdit(vshControl *ctl, const vshCmd *cmd)
ret = true; goto edit_cleanup;
#define EDIT_DEFINE \
(iface_edited = virInterfaceDefineXML(ctl->conn, doc_edited, 0))
-#define EDIT_FREE \
- if (iface_edited) \
- virInterfaceFree(iface_edited);
#include "virsh-edit.c"
vshPrint(ctl, _("Interface %s XML configuration edited.\n"),
diff --git a/tools/virsh-network.c b/tools/virsh-network.c
index 9497472..5fe4b32 100644
--- a/tools/virsh-network.c
+++ b/tools/virsh-network.c
@@ -1111,9 +1111,6 @@ cmdNetworkEdit(vshControl *ctl, const vshCmd *cmd)
ret = true; goto edit_cleanup;
#define EDIT_DEFINE \
(network_edited = virNetworkDefineXML(ctl->conn, doc_edited))
-#define EDIT_FREE \
- if (network_edited) \
- virNetworkFree(network_edited);
#include "virsh-edit.c"
vshPrint(ctl, _("Network %s XML configuration edited.\n"),
diff --git a/tools/virsh-nwfilter.c b/tools/virsh-nwfilter.c
index 6e6e21b..ca54c9d 100644
--- a/tools/virsh-nwfilter.c
+++ b/tools/virsh-nwfilter.c
@@ -428,9 +428,6 @@ cmdNWFilterEdit(vshControl *ctl, const vshCmd *cmd)
ret = true; goto edit_cleanup;
#define EDIT_DEFINE \
(nwfilter_edited = virNWFilterDefineXML(ctl->conn, doc_edited))
-#define EDIT_FREE \
- if (nwfilter_edited) \
- virNWFilterFree(nwfilter);
#include "virsh-edit.c"
vshPrint(ctl, _("Network filter %s XML configuration edited.\n"),
diff --git a/tools/virsh-pool.c b/tools/virsh-pool.c
index 80313b1..0b8dba5 100644
--- a/tools/virsh-pool.c
+++ b/tools/virsh-pool.c
@@ -1767,9 +1767,6 @@ cmdPoolEdit(vshControl *ctl, const vshCmd *cmd)
ret = true; goto edit_cleanup;
#define EDIT_DEFINE \
(pool_edited = virStoragePoolDefineXML(ctl->conn, doc_edited, 0))
-#define EDIT_FREE \
- if (pool_edited) \
- virStoragePoolFree(pool_edited);
#include "virsh-edit.c"
vshPrint(ctl, _("Pool %s XML configuration edited.\n"),
diff --git a/tools/virsh-snapshot.c b/tools/virsh-snapshot.c
index 3ecb3de..885ad22 100644
--- a/tools/virsh-snapshot.c
+++ b/tools/virsh-snapshot.c
@@ -589,9 +589,6 @@ cmdSnapshotEdit(vshControl *ctl, const vshCmd *cmd)
(strstr(doc, "<state>disk-snapshot</state>") ? \
define_flags |= VIR_DOMAIN_SNAPSHOT_CREATE_DISK_ONLY : 0), \
edited = virDomainSnapshotCreateXML(dom, doc_edited, define_flags)
-#define EDIT_FREE \
- if (edited) \
- virDomainSnapshotFree(edited);
#include "virsh-edit.c"
edited_name = virDomainSnapshotGetName(edited);
--
1.9.3
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