diff mbox series

[v3,08/22] module: check module wasn't already initialized

Message ID 20190918231846.22538-9-alxndr@bu.edu (mailing list archive)
State New, archived
Headers show
Series Add virtual device fuzzing support | expand

Commit Message

Alexander Bulekov Sept. 18, 2019, 11:19 p.m. UTC 
The virtual-device fuzzer must initialize QOM, prior to running
vl:qemu_init, so that it can use the qos_graph to identify the arguments
required to initialize a guest for libqos-assisted fuzzing. This change
prevents errors when vl:qemu_init tries to (re)initialize the previously
initialized QOM module.

Signed-off-by: Alexander Oleinik <alxndr@bu.edu>
---
 util/module.c | 7 +++++++
 1 file changed, 7 insertions(+)

Comments

Stefan Hajnoczi Sept. 19, 2019, 10:30 a.m. UTC | #1 
On Wed, Sep 18, 2019 at 11:19:35PM +0000, Oleinik, Alexander wrote:
> The virtual-device fuzzer must initialize QOM, prior to running
> vl:qemu_init, so that it can use the qos_graph to identify the arguments
> required to initialize a guest for libqos-assisted fuzzing. This change
> prevents errors when vl:qemu_init tries to (re)initialize the previously
> initialized QOM module.
> 
> Signed-off-by: Alexander Oleinik <alxndr@bu.edu>
> ---
>  util/module.c | 7 +++++++
>  1 file changed, 7 insertions(+)

Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
diff mbox series

Patch

diff --git a/util/module.c b/util/module.c
index e9fe3e5422..841e490e06 100644
--- a/util/module.c
+++ b/util/module.c
@@ -30,6 +30,7 @@  typedef struct ModuleEntry
 typedef QTAILQ_HEAD(, ModuleEntry) ModuleTypeList;
 
 static ModuleTypeList init_type_list[MODULE_INIT_MAX];
+static bool modules_init_done[MODULE_INIT_MAX];
 
 static ModuleTypeList dso_init_list;
 
@@ -91,11 +92,17 @@  void module_call_init(module_init_type type)
     ModuleTypeList *l;
     ModuleEntry *e;
 
+    if (modules_init_done[type]) {
+        return;
+    }
+
     l = find_type(type);
 
     QTAILQ_FOREACH(e, l, node) {
         e->init();
     }
+
+    modules_init_done[type] = true;
 }
 
 #ifdef CONFIG_MODULES