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[PATCH 08/19] thread: add tsan annotations to QemuSpin
From: |
Robert Foley |
Subject: |
[PATCH 08/19] thread: add tsan annotations to QemuSpin |
Date: |
Fri, 22 May 2020 12:07:44 -0400 |
From: "Emilio G. Cota" <address@hidden>
Signed-off-by: Emilio G. Cota <address@hidden>
Signed-off-by: Robert Foley <address@hidden>
---
include/qemu/thread.h | 39 ++++++++++++++++++++++++++++++++++++---
1 file changed, 36 insertions(+), 3 deletions(-)
diff --git a/include/qemu/thread.h b/include/qemu/thread.h
index e50a073889..43fc094b96 100644
--- a/include/qemu/thread.h
+++ b/include/qemu/thread.h
@@ -206,6 +206,10 @@ void qemu_thread_atexit_add(struct Notifier *notifier);
*/
void qemu_thread_atexit_remove(struct Notifier *notifier);
+#ifdef CONFIG_TSAN
+#include <sanitizer/tsan_interface.h>
+#endif
+
struct QemuSpin {
int value;
};
@@ -213,23 +217,46 @@ struct QemuSpin {
static inline void qemu_spin_init(QemuSpin *spin)
{
__sync_lock_release(&spin->value);
+#ifdef CONFIG_TSAN
+ __tsan_mutex_create(spin, __tsan_mutex_not_static);
+#endif
}
-static inline void qemu_spin_destroy(QemuSpin *spin)
-{ }
+/* const parameter because the only purpose here is the TSAN annotation */
+static inline void qemu_spin_destroy(const QemuSpin *spin)
+{
+#ifdef CONFIG_TSAN
+ __tsan_mutex_destroy((void *)spin, __tsan_mutex_not_static);
+#endif
+}
static inline void qemu_spin_lock(QemuSpin *spin)
{
+#ifdef CONFIG_TSAN
+ __tsan_mutex_pre_lock(spin, 0);
+#endif
while (unlikely(__sync_lock_test_and_set(&spin->value, true))) {
while (atomic_read(&spin->value)) {
cpu_relax();
}
}
+#ifdef CONFIG_TSAN
+ __tsan_mutex_post_lock(spin, 0, 0);
+#endif
}
static inline bool qemu_spin_trylock(QemuSpin *spin)
{
- return __sync_lock_test_and_set(&spin->value, true);
+#ifdef CONFIG_TSAN
+ __tsan_mutex_pre_lock(spin, __tsan_mutex_try_lock);
+#endif
+ bool busy = __sync_lock_test_and_set(&spin->value, true);
+#ifdef CONFIG_TSAN
+ unsigned flags = __tsan_mutex_try_lock;
+ flags |= busy ? __tsan_mutex_try_lock_failed : 0;
+ __tsan_mutex_post_lock(spin, flags, 0);
+#endif
+ return busy;
}
static inline bool qemu_spin_locked(QemuSpin *spin)
@@ -239,7 +266,13 @@ static inline bool qemu_spin_locked(QemuSpin *spin)
static inline void qemu_spin_unlock(QemuSpin *spin)
{
+#ifdef CONFIG_TSAN
+ __tsan_mutex_pre_unlock(spin, 0);
+#endif
__sync_lock_release(&spin->value);
+#ifdef CONFIG_TSAN
+ __tsan_mutex_post_unlock(spin, 0);
+#endif
}
struct QemuLockCnt {
--
2.17.1
- [PATCH 00/19] Add Thread Sanitizer support to QEMU, Robert Foley, 2020/05/22
- [PATCH 01/19] configure: add --enable-tsan flag + fiber annotations for coroutine-ucontext, Robert Foley, 2020/05/22
- [PATCH 02/19] cpu: convert queued work to a QSIMPLEQ, Robert Foley, 2020/05/22
- [PATCH 03/19] thread: add qemu_spin_destroy, Robert Foley, 2020/05/22
- [PATCH 04/19] cputlb: destroy CPUTLB with tlb_destroy, Robert Foley, 2020/05/22
- [PATCH 06/19] tcg: call qemu_spin_destroy for tb->jmp_lock, Robert Foley, 2020/05/22
- [PATCH 07/19] translate-all: call qemu_spin_destroy for PageDesc, Robert Foley, 2020/05/22
- [PATCH 08/19] thread: add tsan annotations to QemuSpin,
Robert Foley <=
- [PATCH 09/19] tests/docker: Added docker build support for TSan., Robert Foley, 2020/05/22
- [PATCH 11/19] accel/tcg: Fixed tsan warnings related to parallel_cpus, Robert Foley, 2020/05/22
- [PATCH 10/19] include/qemu: Added tsan.h for annotations., Robert Foley, 2020/05/22
- [PATCH 12/19] configure: added tsan support for blacklist., Robert Foley, 2020/05/22
- [PATCH 13/19] accel/tcg: Fixed tsan warnings., Robert Foley, 2020/05/22