#ifndef TSAN_SYNC_H
#define TSAN_SYNC_H
#include "sanitizer_common/sanitizer_atomic.h"
#include "sanitizer_common/sanitizer_common.h"
#include "sanitizer_common/sanitizer_deadlock_detector_interface.h"
#include "tsan_defs.h"
#include "tsan_clock.h"
#include "tsan_mutex.h"
#include "tsan_dense_alloc.h"
namespace __tsan {
struct SyncVar {
SyncVar();
static const int kInvalidTid = -1;
uptr addr; Mutex mtx;
u64 uid; u32 creation_stack_id;
int owner_tid; u64 last_lock;
int recursion;
bool is_rw;
bool is_recursive;
bool is_broken;
bool is_linker_init;
u32 next; DDMutex dd;
SyncClock read_clock; SyncClock clock;
void Init(ThreadState *thr, uptr pc, uptr addr, u64 uid);
void Reset(ThreadState *thr);
u64 GetId() const {
return GetLsb((u64)addr | (uid << 47), 61);
}
bool CheckId(u64 uid) const {
CHECK_EQ(uid, GetLsb(uid, 14));
return GetLsb(this->uid, 14) == uid;
}
static uptr SplitId(u64 id, u64 *uid) {
*uid = id >> 47;
return (uptr)GetLsb(id, 47);
}
};
class MetaMap {
public:
MetaMap();
void AllocBlock(ThreadState *thr, uptr pc, uptr p, uptr sz);
uptr FreeBlock(ThreadState *thr, uptr pc, uptr p);
void FreeRange(ThreadState *thr, uptr pc, uptr p, uptr sz);
MBlock* GetBlock(uptr p);
SyncVar* GetOrCreateAndLock(ThreadState *thr, uptr pc,
uptr addr, bool write_lock);
SyncVar* GetIfExistsAndLock(uptr addr);
void MoveMemory(uptr src, uptr dst, uptr sz);
void OnThreadIdle(ThreadState *thr);
private:
static const u32 kFlagMask = 3 << 30;
static const u32 kFlagBlock = 1 << 30;
static const u32 kFlagSync = 2 << 30;
typedef DenseSlabAlloc<MBlock, 1<<16, 1<<12> BlockAlloc;
typedef DenseSlabAlloc<SyncVar, 1<<16, 1<<10> SyncAlloc;
BlockAlloc block_alloc_;
SyncAlloc sync_alloc_;
atomic_uint64_t uid_gen_;
SyncVar* GetAndLock(ThreadState *thr, uptr pc, uptr addr, bool write_lock,
bool create);
};
}
#endif // TSAN_SYNC_H