5 files changed, 120 insertions, 4 deletions

diff --git a/include/exec/exec-all.h b/include/exec/exec-all.h
index 8792bea07a..3cf88272df 100644
--- a/include/exec/exec-all.h
+++ b/include/exec/exec-all.h
@@ -125,6 +125,11 @@ void cpu_address_space_init(CPUState *cpu, int asidx,
  */
 void tlb_init(CPUState *cpu);
 /**
+ * tlb_destroy - destroy a CPU's TLB
+ * @cpu: CPU whose TLB should be destroyed
+ */
+void tlb_destroy(CPUState *cpu);
+/**
  * tlb_flush_page:
  * @cpu: CPU whose TLB should be flushed
  * @addr: virtual address of page to be flushed
@@ -284,6 +289,9 @@ void tlb_set_page(CPUState *cpu, target_ulong vaddr,
 static inline void tlb_init(CPUState *cpu)
 {
 }
+static inline void tlb_destroy(CPUState *cpu)
+{
+}
 static inline void tlb_flush_page(CPUState *cpu, target_ulong addr)
 {
 }
diff --git a/include/hw/core/cpu.h b/include/hw/core/cpu.h
index 497600c49e..b3f4b79318 100644
--- a/include/hw/core/cpu.h
+++ b/include/hw/core/cpu.h
@@ -331,8 +331,8 @@ struct qemu_work_item;
  * @opaque: User data.
  * @mem_io_pc: Host Program Counter at which the memory was accessed.
  * @kvm_fd: vCPU file descriptor for KVM.
- * @work_mutex: Lock to prevent multiple access to queued_work_*.
- * @queued_work_first: First asynchronous work pending.
+ * @work_mutex: Lock to prevent multiple access to @work_list.
+ * @work_list: List of pending asynchronous work.
  * @trace_dstate_delayed: Delayed changes to trace_dstate (includes all changes
  *                        to @trace_dstate).
  * @trace_dstate: Dynamic tracing state of events for this vCPU (bitmask).
@@ -376,7 +376,7 @@ struct CPUState {
     sigjmp_buf jmp_env;
 
     QemuMutex work_mutex;
-    struct qemu_work_item *queued_work_first, *queued_work_last;
+    QSIMPLEQ_HEAD(, qemu_work_item) work_list;
 
     CPUAddressSpace *cpu_ases;
     int num_ases;
diff --git a/include/qemu/thread.h b/include/qemu/thread.h
index 06c058fb58..4baf4d1715 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;
 };
@@ -213,20 +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
+}
+
+/* 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)
@@ -236,7 +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 {
diff --git a/include/qemu/tsan.h b/include/qemu/tsan.h
new file mode 100644
index 0000000000..09cc665f91
--- /dev/null
+++ b/include/qemu/tsan.h
@@ -0,0 +1,71 @@
+#ifndef QEMU_TSAN_H
+#define QEMU_TSAN_H
+/*
+ * tsan.h
+ *
+ * This file defines macros used to give ThreadSanitizer
+ * additional information to help suppress warnings.
+ * This is necessary since TSan does not provide a header file
+ * for these annotations.  The standard way to include these
+ * is via the below macros.
+ *
+ * Annotation examples can be found here:
+ *  https://github.com/llvm/llvm-project/tree/master/compiler-rt/test/tsan
+ * annotate_happens_before.cpp or ignore_race.cpp are good places to start.
+ *
+ * The full set of annotations can be found here in tsan_interface_ann.cpp.
+ *  https://github.com/llvm/llvm-project/blob/master/compiler-rt/lib/tsan/rtl/
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ */
+
+#ifdef CONFIG_TSAN
+/*
+ * Informs TSan of a happens before/after relationship.
+ */
+#define QEMU_TSAN_ANNOTATE_HAPPENS_BEFORE(addr) \
+    AnnotateHappensBefore(__FILE__, __LINE__, (void *)(addr))
+#define QEMU_TSAN_ANNOTATE_HAPPENS_AFTER(addr) \
+    AnnotateHappensAfter(__FILE__, __LINE__, (void *)(addr))
+/*
+ * Gives TSan more information about thread names it can report the
+ * name of the thread in the warning report.
+ */
+#define QEMU_TSAN_ANNOTATE_THREAD_NAME(name) \
+    AnnotateThreadName(__FILE__, __LINE__, (void *)(name))
+/*
+ * Allows defining a region of code on which TSan will not record memory READS.
+ * This has the effect of disabling race detection for this section of code.
+ */
+#define QEMU_TSAN_ANNOTATE_IGNORE_READS_BEGIN() \
+    AnnotateIgnoreReadsBegin(__FILE__, __LINE__)
+#define QEMU_TSAN_ANNOTATE_IGNORE_READS_END() \
+    AnnotateIgnoreReadsEnd(__FILE__, __LINE__)
+/*
+ * Allows defining a region of code on which TSan will not record memory
+ * WRITES.  This has the effect of disabling race detection for this
+ * section of code.
+ */
+#define QEMU_TSAN_ANNOTATE_IGNORE_WRITES_BEGIN() \
+    AnnotateIgnoreWritesBegin(__FILE__, __LINE__)
+#define QEMU_TSAN_ANNOTATE_IGNORE_WRITES_END() \
+    AnnotateIgnoreWritesEnd(__FILE__, __LINE__)
+#else
+#define QEMU_TSAN_ANNOTATE_HAPPENS_BEFORE(addr)
+#define QEMU_TSAN_ANNOTATE_HAPPENS_AFTER(addr)
+#define QEMU_TSAN_ANNOTATE_THREAD_NAME(name)
+#define QEMU_TSAN_ANNOTATE_IGNORE_READS_BEGIN()
+#define QEMU_TSAN_ANNOTATE_IGNORE_READS_END()
+#define QEMU_TSAN_ANNOTATE_IGNORE_WRITES_BEGIN()
+#define QEMU_TSAN_ANNOTATE_IGNORE_WRITES_END()
+#endif
+
+void AnnotateHappensBefore(const char *f, int l, void *addr);
+void AnnotateHappensAfter(const char *f, int l, void *addr);
+void AnnotateThreadName(const char *f, int l, char *name);
+void AnnotateIgnoreReadsBegin(const char *f, int l);
+void AnnotateIgnoreReadsEnd(const char *f, int l);
+void AnnotateIgnoreWritesBegin(const char *f, int l);
+void AnnotateIgnoreWritesEnd(const char *f, int l);
+#endif
diff --git a/include/tcg/tcg.h b/include/tcg/tcg.h
index 380014ed80..e63450a893 100644
--- a/include/tcg/tcg.h
+++ b/include/tcg/tcg.h
@@ -819,6 +819,7 @@ void tcg_pool_reset(TCGContext *s);
 TranslationBlock *tcg_tb_alloc(TCGContext *s);
 
 void tcg_region_init(void);
+void tb_destroy(TranslationBlock *tb);
 void tcg_region_reset_all(void);
 
 size_t tcg_code_size(void);