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lockable: Do not cast function pointers

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-fsanitize=undefined complains if function pointers are casted. It
also prevents enabling the strict mode of CFI which is currently
disabled with -fsanitize-cfi-icall-generalize-pointers.

Resolves: https://gitlab.com/qemu-project/qemu/-/issues/2345
Signed-off-by: Akihiko Odaki <akihiko.odaki@daynix.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-ID: <20240524-xkb-v4-2-2de564e5c859@daynix.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
This commit is contained in:
Akihiko Odaki 2024-05-24 14:35:48 +09:00 committed by Thomas Huth
parent 2523baf7fb
commit a3b3ad72e8
1 changed files with 19 additions and 4 deletions
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23
include/qemu/lockable.h
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@ -43,15 +43,30 @@ qemu_null_lockable(void *x)
return NULL;
}
#define QML_FUNC_(name) \
static inline void qemu_lockable_ ## name ## _lock(void *x) \
{ \
qemu_ ## name ## _lock(x); \
} \
static inline void qemu_lockable_ ## name ## _unlock(void *x) \
{ \
qemu_ ## name ## _unlock(x); \
}
QML_FUNC_(mutex)
QML_FUNC_(rec_mutex)
QML_FUNC_(co_mutex)
QML_FUNC_(spin)
/*
* In C, compound literals have the lifetime of an automatic variable.
* In C++ it would be different, but then C++ wouldn't need QemuLockable
* either...
*/
#define QML_OBJ_(x, name) (&(QemuLockable) { \
.object = (x), \
.lock = (QemuLockUnlockFunc *) qemu_ ## name ## _lock, \
.unlock = (QemuLockUnlockFunc *) qemu_ ## name ## _unlock \
#define QML_OBJ_(x, name) (&(QemuLockable) { \
.object = (x), \
.lock = qemu_lockable_ ## name ## _lock, \
.unlock = qemu_lockable_ ## name ## _unlock \
})
/**