Export of internal Abseil changes

--
972333fe1e43427849b8a634aa35061e81be3642 by Abseil Team <absl-team@google.com>:

Replace deprecated thread annotations macros.

PiperOrigin-RevId: 267332619

--
7039c6dc499a31c372b4872eda0772455931c360 by Gennadiy Rozental <rogeeff@google.com>:

Internal change

PiperOrigin-RevId: 267220271

--
a3f524d2afc2535686f206a7ce06961016349d7a by Abseil Team <absl-team@google.com>:

Factor kernel_timeout out of synchronization.

PiperOrigin-RevId: 267217304

--
90287de4114ef9a06cafe50256a2d03349772c21 by Abseil Team <absl-team@google.com>:

Fixed comment typo.

PiperOrigin-RevId: 267198532

--
d312c1a1e52aeca1871ff0deead416d09a7f237e by Gennadiy Rozental <rogeeff@google.com>:

Internal change

PiperOrigin-RevId: 267185804
GitOrigin-RevId: 972333fe1e43427849b8a634aa35061e81be3642
Change-Id: Ia8a2f877c57cef9854aad48f1753af872fc04dc8

27 files changed, 282 insertions, 377 deletions

diff --git a/absl/base/call_once_test.cc b/absl/base/call_once_test.cc
index 9c2a0c447053..9a5a5c13be72 100644
--- a/absl/base/call_once_test.cc
+++ b/absl/base/call_once_test.cc
@@ -30,11 +30,11 @@ absl::once_flag once;
 
 ABSL_CONST_INIT Mutex counters_mu(absl::kConstInit);
 
-int running_thread_count GUARDED_BY(counters_mu) = 0;
-int call_once_invoke_count GUARDED_BY(counters_mu) = 0;
-int call_once_finished_count GUARDED_BY(counters_mu) = 0;
-int call_once_return_count GUARDED_BY(counters_mu) = 0;
-bool done_blocking GUARDED_BY(counters_mu) = false;
+int running_thread_count ABSL_GUARDED_BY(counters_mu) = 0;
+int call_once_invoke_count ABSL_GUARDED_BY(counters_mu) = 0;
+int call_once_finished_count ABSL_GUARDED_BY(counters_mu) = 0;
+int call_once_return_count ABSL_GUARDED_BY(counters_mu) = 0;
+bool done_blocking ABSL_GUARDED_BY(counters_mu) = false;
 
 // Function to be called from absl::call_once.  Waits for a notification.
 void WaitAndIncrement() {
@@ -60,7 +60,7 @@ void ThreadBody() {
 }
 
 // Returns true if all threads are set up for the test.
-bool ThreadsAreSetup(void*) EXCLUSIVE_LOCKS_REQUIRED(counters_mu) {
+bool ThreadsAreSetup(void*) ABSL_EXCLUSIVE_LOCKS_REQUIRED(counters_mu) {
   // All ten threads must be running, and WaitAndIncrement should be blocked.
   return running_thread_count == 10 && call_once_invoke_count == 1;
 }
diff --git a/absl/base/internal/low_level_alloc.cc b/absl/base/internal/low_level_alloc.cc
index 36e4f1bae03b..64d7aa80b131 100644
--- a/absl/base/internal/low_level_alloc.cc
+++ b/absl/base/internal/low_level_alloc.cc
@@ -203,9 +203,9 @@ struct LowLevelAlloc::Arena {
 
   base_internal::SpinLock mu;
   // Head of free list, sorted by address
-  AllocList freelist GUARDED_BY(mu);
+  AllocList freelist ABSL_GUARDED_BY(mu);
   // Count of allocated blocks
-  int32_t allocation_count GUARDED_BY(mu);
+  int32_t allocation_count ABSL_GUARDED_BY(mu);
   // flags passed to NewArena
   const uint32_t flags;
   // Result of sysconf(_SC_PAGESIZE)
@@ -215,7 +215,7 @@ struct LowLevelAlloc::Arena {
   // Smallest allocation block size
   const size_t min_size;
   // PRNG state
-  uint32_t random GUARDED_BY(mu);
+  uint32_t random ABSL_GUARDED_BY(mu);
 };
 
 namespace {
@@ -275,10 +275,10 @@ static const uintptr_t kMagicAllocated = 0x4c833e95U;
 static const uintptr_t kMagicUnallocated = ~kMagicAllocated;
 
 namespace {
-class SCOPED_LOCKABLE ArenaLock {
+class ABSL_SCOPED_LOCKABLE ArenaLock {
  public:
   explicit ArenaLock(LowLevelAlloc::Arena *arena)
-      EXCLUSIVE_LOCK_FUNCTION(arena->mu)
+      ABSL_EXCLUSIVE_LOCK_FUNCTION(arena->mu)
       : arena_(arena) {
 #ifndef ABSL_LOW_LEVEL_ALLOC_ASYNC_SIGNAL_SAFE_MISSING
     if ((arena->flags & LowLevelAlloc::kAsyncSignalSafe) != 0) {
@@ -290,7 +290,7 @@ class SCOPED_LOCKABLE ArenaLock {
     arena_->mu.Lock();
   }
   ~ArenaLock() { ABSL_RAW_CHECK(left_, "haven't left Arena region"); }
-  void Leave() UNLOCK_FUNCTION() {
+  void Leave() ABSL_UNLOCK_FUNCTION() {
     arena_->mu.Unlock();
 #ifndef ABSL_LOW_LEVEL_ALLOC_ASYNC_SIGNAL_SAFE_MISSING
     if (mask_valid_) {
diff --git a/absl/base/internal/spinlock.h b/absl/base/internal/spinlock.h
index 6ee60ac8c1ff..1d1bd6cfcf5a 100644
--- a/absl/base/internal/spinlock.h
+++ b/absl/base/internal/spinlock.h
@@ -48,7 +48,7 @@
 namespace absl {
 namespace base_internal {
 
-class LOCKABLE SpinLock {
+class ABSL_LOCKABLE SpinLock {
  public:
   SpinLock() : lockword_(kSpinLockCooperative) {
     ABSL_TSAN_MUTEX_CREATE(this, __tsan_mutex_not_static);
@@ -79,7 +79,7 @@ class LOCKABLE SpinLock {
   ~SpinLock() { ABSL_TSAN_MUTEX_DESTROY(this, __tsan_mutex_not_static); }
 
   // Acquire this SpinLock.
-  inline void Lock() EXCLUSIVE_LOCK_FUNCTION() {
+  inline void Lock() ABSL_EXCLUSIVE_LOCK_FUNCTION() {
     ABSL_TSAN_MUTEX_PRE_LOCK(this, 0);
     if (!TryLockImpl()) {
       SlowLock();
@@ -91,7 +91,7 @@ class LOCKABLE SpinLock {
   // acquisition was successful.  If the lock was not acquired, false is
   // returned.  If this SpinLock is free at the time of the call, TryLock
   // will return true with high probability.
-  inline bool TryLock() EXCLUSIVE_TRYLOCK_FUNCTION(true) {
+  inline bool TryLock() ABSL_EXCLUSIVE_TRYLOCK_FUNCTION(true) {
     ABSL_TSAN_MUTEX_PRE_LOCK(this, __tsan_mutex_try_lock);
     bool res = TryLockImpl();
     ABSL_TSAN_MUTEX_POST_LOCK(
@@ -101,7 +101,7 @@ class LOCKABLE SpinLock {
   }
 
   // Release this SpinLock, which must be held by the calling thread.
-  inline void Unlock() UNLOCK_FUNCTION() {
+  inline void Unlock() ABSL_UNLOCK_FUNCTION() {
     ABSL_TSAN_MUTEX_PRE_UNLOCK(this, 0);
     uint32_t lock_value = lockword_.load(std::memory_order_relaxed);
     lock_value = lockword_.exchange(lock_value & kSpinLockCooperative,
@@ -179,13 +179,13 @@ class LOCKABLE SpinLock {
 
 // Corresponding locker object that arranges to acquire a spinlock for
 // the duration of a C++ scope.
-class SCOPED_LOCKABLE SpinLockHolder {
+class ABSL_SCOPED_LOCKABLE SpinLockHolder {
  public:
-  inline explicit SpinLockHolder(SpinLock* l) EXCLUSIVE_LOCK_FUNCTION(l)
+  inline explicit SpinLockHolder(SpinLock* l) ABSL_EXCLUSIVE_LOCK_FUNCTION(l)
       : lock_(l) {
     l->Lock();
   }
-  inline ~SpinLockHolder() UNLOCK_FUNCTION() { lock_->Unlock(); }
+  inline ~SpinLockHolder() ABSL_UNLOCK_FUNCTION() { lock_->Unlock(); }
 
   SpinLockHolder(const SpinLockHolder&) = delete;
   SpinLockHolder& operator=(const SpinLockHolder&) = delete;
diff --git a/absl/container/internal/hashtablez_sampler.h b/absl/container/internal/hashtablez_sampler.h
index a308e7881962..4112175449ef 100644
--- a/absl/container/internal/hashtablez_sampler.h
+++ b/absl/container/internal/hashtablez_sampler.h
@@ -65,7 +65,7 @@ struct HashtablezInfo {
 
   // Puts the object into a clean state, fills in the logically `const` members,
   // blocking for any readers that are currently sampling the object.
-  void PrepareForSampling() EXCLUSIVE_LOCKS_REQUIRED(init_mu);
+  void PrepareForSampling() ABSL_EXCLUSIVE_LOCKS_REQUIRED(init_mu);
 
   // These fields are mutated by the various Record* APIs and need to be
   // thread-safe.
@@ -83,7 +83,7 @@ struct HashtablezInfo {
   // prevents races with sampling and resurrecting an object.
   absl::Mutex init_mu;
   HashtablezInfo* next;
-  HashtablezInfo* dead GUARDED_BY(init_mu);
+  HashtablezInfo* dead ABSL_GUARDED_BY(init_mu);
 
   // All of the fields below are set by `PrepareForSampling`, they must not be
   // mutated in `Record*` functions.  They are logically `const` in that sense.
diff --git a/absl/flags/internal/commandlineflag.cc b/absl/flags/internal/commandlineflag.cc
index 2063cda64d5d..ae6a8d70fbf1 100644
--- a/absl/flags/internal/commandlineflag.cc
+++ b/absl/flags/internal/commandlineflag.cc
@@ -58,55 +58,55 @@ absl::Mutex* InitFlag(CommandLineFlag* flag) {
   {
     absl::MutexLock lock(&init_lock);
 
-    if (flag->locks == nullptr) {  // Must initialize Mutexes for this flag.
-      flag->locks = new flags_internal::CommandLineFlagLocks;
+    if (flag->locks_ == nullptr) {  // Must initialize Mutexes for this flag.
+      flag->locks_ = new flags_internal::CommandLineFlagLocks;
     }
 
-    mu = &flag->locks->primary_mu;
+    mu = &flag->locks_->primary_mu;
   }
 
   {
     absl::MutexLock lock(mu);
 
-    if (!flag->IsRetired() && flag->def == nullptr) {
+    if (!flag->IsRetired() && flag->def_ == nullptr) {
       // Need to initialize def and cur fields.
-      flag->def = (*flag->make_init_value)();
-      flag->cur = Clone(flag->op, flag->def);
+      flag->def_ = (*flag->make_init_value_)();
+      flag->cur_ = Clone(flag->op_, flag->def_);
       UpdateCopy(flag);
-      flag->inited.store(true, std::memory_order_release);
+      flag->inited_.store(true, std::memory_order_release);
       flag->InvokeCallback();
     }
   }
 
-  flag->inited.store(true, std::memory_order_release);
+  flag->inited_.store(true, std::memory_order_release);
   return mu;
 }
 
 // Ensure that the lazily initialized fields of *flag have been initialized,
-// and return &flag->locks->primary_mu.
+// and return &flag->locks_->primary_mu.
 absl::Mutex* CommandLineFlag::InitFlagIfNecessary() const
-    LOCK_RETURNED(locks->primary_mu) {
-  if (!this->inited.load(std::memory_order_acquire)) {
+    ABSL_LOCK_RETURNED(locks_->primary_mu) {
+  if (!inited_.load(std::memory_order_acquire)) {
     return InitFlag(const_cast<CommandLineFlag*>(this));
   }
 
-  // All fields initialized; this->locks is therefore safe to read.
-  return &this->locks->primary_mu;
+  // All fields initialized; locks_ is therefore safe to read.
+  return &locks_->primary_mu;
 }
 
 bool CommandLineFlag::IsModified() const {
   absl::MutexLock l(InitFlagIfNecessary());
-  return modified;
+  return modified_;
 }
 
 void CommandLineFlag::SetModified(bool is_modified) {
   absl::MutexLock l(InitFlagIfNecessary());
-  modified = is_modified;
+  modified_ = is_modified;
 }
 
 bool CommandLineFlag::IsSpecifiedOnCommandLine() const {
   absl::MutexLock l(InitFlagIfNecessary());
-  return on_command_line;
+  return on_command_line_;
 }
 
 absl::string_view CommandLineFlag::Typename() const {
@@ -134,19 +134,19 @@ absl::string_view CommandLineFlag::Typename() const {
 }
 
 std::string CommandLineFlag::Filename() const {
-  return flags_internal::GetUsageConfig().normalize_filename(this->filename);
+  return flags_internal::GetUsageConfig().normalize_filename(filename_);
 }
 
 std::string CommandLineFlag::DefaultValue() const {
   absl::MutexLock l(InitFlagIfNecessary());
 
-  return Unparse(this->marshalling_op, this->def);
+  return Unparse(marshalling_op_, def_);
 }
 
 std::string CommandLineFlag::CurrentValue() const {
   absl::MutexLock l(InitFlagIfNecessary());
 
-  return Unparse(this->marshalling_op, this->cur);
+  return Unparse(marshalling_op_, cur_);
 }
 
 // Attempts to parse supplied `value` string using parsing routine in the `flag`
@@ -157,31 +157,31 @@ std::string CommandLineFlag::CurrentValue() const {
 // in 'err'
 bool TryParseLocked(CommandLineFlag* flag, void* dst, absl::string_view value,
                     std::string* err)
-    EXCLUSIVE_LOCKS_REQUIRED(flag->locks->primary_mu) {
-  void* tentative_value = Clone(flag->op, flag->def);
+    ABSL_EXCLUSIVE_LOCKS_REQUIRED(flag->locks_->primary_mu) {
+  void* tentative_value = Clone(flag->op_, flag->def_);
   std::string parse_err;
-  if (!Parse(flag->marshalling_op, value, tentative_value, &parse_err)) {
+  if (!Parse(flag->marshalling_op_, value, tentative_value, &parse_err)) {
     auto type_name = flag->Typename();
     absl::string_view err_sep = parse_err.empty() ? "" : "; ";
     absl::string_view typename_sep = type_name.empty() ? "" : " ";
     *err = absl::StrCat("Illegal value '", value, "' specified for",
                         typename_sep, type_name, " flag '", flag->Name(), "'",
                         err_sep, parse_err);
-    Delete(flag->op, tentative_value);
+    Delete(flag->op_, tentative_value);
     return false;
   }
 
   if (!flag->InvokeValidator(tentative_value)) {
     *err = absl::StrCat("Failed validation of new value '",
-                        Unparse(flag->marshalling_op, tentative_value),
+                        Unparse(flag->marshalling_op_, tentative_value),
                         "' for flag '", flag->Name(), "'");
-    Delete(flag->op, tentative_value);
+    Delete(flag->op_, tentative_value);
     return false;
   }
 
-  flag->counter++;
-  Copy(flag->op, tentative_value, dst);
-  Delete(flag->op, tentative_value);
+  flag->counter_++;
+  Copy(flag->op_, tentative_value, dst);
+  Delete(flag->op_, tentative_value);
   return true;
 }
 
@@ -201,38 +201,38 @@ bool CommandLineFlag::SetFromString(absl::string_view value,
   absl::MutexLock l(InitFlagIfNecessary());
 
   // Direct-access flags can be modified without going through the
-  // flag API. Detect such changes and update the flag->modified bit.
+  // flag API. Detect such changes and update the flag->modified_ bit.
   if (!IsAbseilFlag()) {
-    if (!this->modified && ChangedDirectly(this, this->cur, this->def)) {
-      this->modified = true;
+    if (!modified_ && ChangedDirectly(this, cur_, def_)) {
+      modified_ = true;
     }
   }
 
   switch (set_mode) {
     case SET_FLAGS_VALUE: {
       // set or modify the flag's value
-      if (!TryParseLocked(this, this->cur, value, err)) return false;
-      this->modified = true;
+      if (!TryParseLocked(this, cur_, value, err)) return false;
+      modified_ = true;
       UpdateCopy(this);
       InvokeCallback();
 
       if (source == kCommandLine) {
-        this->on_command_line = true;
+        on_command_line_ = true;
       }
       break;
     }
     case SET_FLAG_IF_DEFAULT: {
       // set the flag's value, but only if it hasn't been set by someone else
-      if (!this->modified) {
-        if (!TryParseLocked(this, this->cur, value, err)) return false;
-        this->modified = true;
+      if (!modified_) {
+        if (!TryParseLocked(this, cur_, value, err)) return false;
+        modified_ = true;
         UpdateCopy(this);
         InvokeCallback();
       } else {
         // TODO(rogeeff): review and fix this semantic. Currently we do not fail
         // in this case if flag is modified. This is misleading since the flag's
         // value is not updated even though we return true.
-        // *err = absl::StrCat(this->Name(), " is already set to ",
+        // *err = absl::StrCat(Name(), " is already set to ",
         //                     CurrentValue(), "\n");
         // return false;
         return true;
@@ -241,11 +241,11 @@ bool CommandLineFlag::SetFromString(absl::string_view value,
     }
     case SET_FLAGS_DEFAULT: {
       // modify the flag's default-value
-      if (!TryParseLocked(this, this->def, value, err)) return false;
+      if (!TryParseLocked(this, def_, value, err)) return false;
 
-      if (!this->modified) {
+      if (!modified_) {
         // Need to set both defvalue *and* current, in this case
-        Copy(this->op, this->def, this->cur);
+        Copy(op_, def_, cur_);
         UpdateCopy(this);
         InvokeCallback();
       }
@@ -264,8 +264,8 @@ bool CommandLineFlag::SetFromString(absl::string_view value,
 void CommandLineFlag::StoreAtomic(size_t size) {
   int64_t t = 0;
   assert(size <= sizeof(int64_t));
-  memcpy(&t, this->cur, size);
-  this->atomic.store(t, std::memory_order_release);
+  memcpy(&t, cur_, size);
+  atomic_.store(t, std::memory_order_release);
 }
 
 void CommandLineFlag::CheckDefaultValueParsingRoundtrip() const {
@@ -273,9 +273,9 @@ void CommandLineFlag::CheckDefaultValueParsingRoundtrip() const {
 
   absl::MutexLock lock(InitFlagIfNecessary());
 
-  void* dst = Clone(this->op, this->def);
+  void* dst = Clone(op_, def_);
   std::string error;
-  if (!flags_internal::Parse(this->marshalling_op, v, dst, &error)) {
+  if (!flags_internal::Parse(marshalling_op_, v, dst, &error)) {
     ABSL_INTERNAL_LOG(
         FATAL,
         absl::StrCat("Flag ", Name(), " (from ", Filename(),
@@ -285,23 +285,23 @@ void CommandLineFlag::CheckDefaultValueParsingRoundtrip() const {
 
   // We do not compare dst to def since parsing/unparsing may make
   // small changes, e.g., precision loss for floating point types.
-  Delete(this->op, dst);
+  Delete(op_, dst);
 }
 
 bool CommandLineFlag::ValidateDefaultValue() const {
   absl::MutexLock lock(InitFlagIfNecessary());
-  return InvokeValidator(this->def);
+  return InvokeValidator(def_);
 }
 
 bool CommandLineFlag::ValidateInputValue(absl::string_view value) const {
   absl::MutexLock l(InitFlagIfNecessary());  // protect default value access
 
-  void* obj = Clone(this->op, this->def);
+  void* obj = Clone(op_, def_);
   std::string ignored_error;
   const bool result =
-      flags_internal::Parse(this->marshalling_op, value, obj, &ignored_error) &&
+      flags_internal::Parse(marshalling_op_, value, obj, &ignored_error) &&
       InvokeValidator(obj);
-  Delete(this->op, obj);
+  Delete(op_, obj);
   return result;
 }
 
@@ -314,13 +314,13 @@ void CommandLineFlag::Read(void* dst,
   // `dst_op` is the unmarshaling operation corresponding to the declaration
   // visibile at the call site. `op` is the Flag's defined unmarshalling
   // operation. They must match for this operation to be well-defined.
-  if (ABSL_PREDICT_FALSE(dst_op != op)) {
+  if (ABSL_PREDICT_FALSE(dst_op != op_)) {
     ABSL_INTERNAL_LOG(
         ERROR,
-        absl::StrCat("Flag '", name,
+        absl::StrCat("Flag '", Name(),
                      "' is defined as one type and declared as another"));
   }
-  CopyConstruct(op, cur, dst);
+  CopyConstruct(op_, cur_, dst);
 }
 
 void CommandLineFlag::Write(const void* src,
@@ -330,28 +330,28 @@ void CommandLineFlag::Write(const void* src,
   // `src_op` is the marshalling operation corresponding to the declaration
   // visible at the call site. `op` is the Flag's defined marshalling operation.
   // They must match for this operation to be well-defined.
-  if (ABSL_PREDICT_FALSE(src_op != op)) {
+  if (ABSL_PREDICT_FALSE(src_op != op_)) {
     ABSL_INTERNAL_LOG(
         ERROR,
-        absl::StrCat("Flag '", name,
+        absl::StrCat("Flag '", Name(),
                      "' is defined as one type and declared as another"));
   }
 
   if (ShouldValidateFlagValue(*this)) {
-    void* obj = Clone(op, src);
+    void* obj = Clone(op_, src);
     std::string ignored_error;
-    std::string src_as_str = Unparse(marshalling_op, src);
-    if (!Parse(marshalling_op, src_as_str, obj, &ignored_error) ||
+    std::string src_as_str = Unparse(marshalling_op_, src);
+    if (!Parse(marshalling_op_, src_as_str, obj, &ignored_error) ||
         !InvokeValidator(obj)) {
-      ABSL_INTERNAL_LOG(ERROR, absl::StrCat("Attempt to set flag '", name,
+      ABSL_INTERNAL_LOG(ERROR, absl::StrCat("Attempt to set flag '", Name(),
                                             "' to invalid value ", src_as_str));
     }
-    Delete(op, obj);
+    Delete(op_, obj);
   }
 
-  modified = true;
-  counter++;
-  Copy(op, src, cur);
+  modified_ = true;
+  counter_++;
+  Copy(op_, src, cur_);
 
   UpdateCopy(this);
   InvokeCallback();
diff --git a/absl/flags/internal/commandlineflag.h b/absl/flags/internal/commandlineflag.h
index 235125762b27..572568b93711 100644
--- a/absl/flags/internal/commandlineflag.h
+++ b/absl/flags/internal/commandlineflag.h
@@ -69,8 +69,6 @@ using HelpGenFunc = std::string (*)();
 // based on default value supplied in flag's definition)
 using InitialValGenFunc = void* (*)();
 
-struct CommandLineFlagInfo;
-
 extern const char kStrippedFlagHelp[];
 
 // The per-type function
@@ -189,27 +187,28 @@ class HelpText {
 };
 
 // Holds all information for a flag.
-struct CommandLineFlag {
+class CommandLineFlag {
+ public:
   constexpr CommandLineFlag(
-      const char* name_arg, HelpText help_text, const char* filename_arg,
-      const flags_internal::FlagOpFn op_arg,
-      const flags_internal::FlagMarshallingOpFn marshalling_op_arg,
-      const flags_internal::InitialValGenFunc initial_value_gen, void* def_arg,
-      void* cur_arg)
-      : name(name_arg),
-        help(help_text),
-        filename(filename_arg),
-        op(op_arg),
-        marshalling_op(marshalling_op_arg),
-        make_init_value(initial_value_gen),
-        inited(false),
-        modified(false),
-        on_command_line(false),
-        def(def_arg),
-        cur(cur_arg),
-        counter(0),
-        atomic(kAtomicInit),
-        locks(nullptr) {}
+      const char* name, HelpText help_text, const char* filename,
+      const flags_internal::FlagOpFn op,
+      const flags_internal::FlagMarshallingOpFn marshalling_op,
+      const flags_internal::InitialValGenFunc initial_value_gen, void* def,
+      void* cur)
+      : name_(name),
+        help_(help_text),
+        filename_(filename),
+        op_(op),
+        marshalling_op_(marshalling_op),
+        make_init_value_(initial_value_gen),
+        inited_(false),
+        modified_(false),
+        on_command_line_(false),
+        def_(def),
+        cur_(cur),
+        counter_(0),
+        atomic_(kAtomicInit),
+        locks_(nullptr) {}
 
   // Virtual destructor
   virtual void Destroy() const = 0;
@@ -225,8 +224,8 @@ struct CommandLineFlag {
   // Returns true iff this is a handle to an Abseil Flag.
   virtual bool IsAbseilFlag() const { return true; }
 
-  absl::string_view Name() const { return name; }
-  std::string Help() const { return help.GetHelpText(); }
+  absl::string_view Name() const { return name_; }
+  std::string Help() const { return help_.GetHelpText(); }
   bool IsModified() const;
   void SetModified(bool is_modified);
   bool IsSpecifiedOnCommandLine() const;
@@ -247,15 +246,14 @@ struct CommandLineFlag {
   // Return true iff flag has type T.
   template <typename T>
   inline bool IsOfType() const {
-    return this->op == &flags_internal::FlagOps<T>;
+    return op_ == &flags_internal::FlagOps<T>;
   }
 
   // Attempts to retrieve the flag value. Returns value on success,
   // absl::nullopt otherwise.
   template <typename T>
   absl::optional<T> Get() const {
-    if (IsRetired() || flags_internal::FlagOps<T> != this->op)
-      return absl::nullopt;
+    if (IsRetired() || flags_internal::FlagOps<T> != op_) return absl::nullopt;
 
     T res;
     Read(&res, flags_internal::FlagOps<T>);
@@ -286,36 +284,36 @@ struct CommandLineFlag {
  protected:
   ~CommandLineFlag() = default;
 
-  const char* const name;
-  const HelpText help;
-  const char* const filename;
+  const char* const name_;
+  const HelpText help_;
+  const char* const filename_;
 
-  const FlagOpFn op;                         // Type-specific handler
-  const FlagMarshallingOpFn marshalling_op;  // Marshalling ops handler
-  const InitialValGenFunc make_init_value;   // Makes initial value for the flag
-  std::atomic<bool> inited;  // fields have been lazily initialized
+  const FlagOpFn op_;                         // Type-specific handler
+  const FlagMarshallingOpFn marshalling_op_;  // Marshalling ops handler
+  const InitialValGenFunc make_init_value_;  // Makes initial value for the flag
+  std::atomic<bool> inited_;  // fields have been lazily initialized
 
-  // Mutable state (guarded by locks->primary_mu).
-  bool modified;            // Has flag value been modified?
-  bool on_command_line;     // Specified on command line.
-  void* def;                // Lazily initialized pointer to default value
-  void* cur;                // Lazily initialized pointer to current value
-  int64_t counter;            // Mutation counter
+  // Mutable state (guarded by locks_->primary_mu).
+  bool modified_;         // Has flag value been modified?
+  bool on_command_line_;  // Specified on command line.
+  void* def_;             // Lazily initialized pointer to default value
+  void* cur_;             // Lazily initialized pointer to current value
+  int64_t counter_;         // Mutation counter
 
   // For some types, a copy of the current value is kept in an atomically
   // accessible field.
   static const int64_t kAtomicInit = 0xababababababababll;
-  std::atomic<int64_t> atomic;
+  std::atomic<int64_t> atomic_;
 
   // Lazily initialized mutexes for this flag value.  We cannot inline a
   // SpinLock or Mutex here because those have non-constexpr constructors and
   // so would prevent constant initialization of this type.
   // TODO(rogeeff): fix it once Mutex has constexpr constructor
-  struct CommandLineFlagLocks* locks;  // locks, laziliy allocated.
+  struct CommandLineFlagLocks* locks_;  // locks, laziliy allocated.
 
   // Ensure that the lazily initialized fields of *flag have been initialized,
   // and return the lock which should be locked when flag's state is mutated.
-  absl::Mutex* InitFlagIfNecessary() const LOCK_RETURNED(locks->primary_mu);
+  absl::Mutex* InitFlagIfNecessary() const ABSL_LOCK_RETURNED(locks_->primary_mu);
 
   // copy construct new value of flag's type in a memory referenced by dst
   // based on current flag's value
@@ -326,8 +324,6 @@ struct CommandLineFlag {
   friend class FlagRegistry;
   friend class FlagPtrMap;
   friend class FlagSaverImpl;
-  friend void FillCommandLineFlagInfo(CommandLineFlag* flag,
-                                      CommandLineFlagInfo* result);
   friend bool TryParseLocked(CommandLineFlag* flag, void* dst,
                              absl::string_view value, std::string* err);
   friend absl::Mutex* InitFlag(CommandLineFlag* flag);
@@ -335,7 +331,7 @@ struct CommandLineFlag {
   // This is a short term, until we completely rework persistent state
   // storage API.
   virtual void* GetValidator() const { return nullptr; }
-  virtual void SetValidator(void*) {}
+  virtual bool SetValidator(void*) { return false; }
 };
 
 // Update any copy of the flag value that is stored in an atomic word.
diff --git a/absl/flags/internal/flag.cc b/absl/flags/internal/flag.cc
index 34629b304aa1..0f4035819cdb 100644
--- a/absl/flags/internal/flag.cc
+++ b/absl/flags/internal/flag.cc
@@ -32,7 +32,7 @@ namespace flags_internal {
 // completed. Requires that *primary_lock be held in exclusive mode; it may be
 // released and reacquired by the implementation.
 void InvokeCallback(absl::Mutex* primary_mu, absl::Mutex* callback_mu,
-                    FlagCallback cb) EXCLUSIVE_LOCKS_REQUIRED(primary_mu) {
+                    FlagCallback cb) ABSL_EXCLUSIVE_LOCKS_REQUIRED(primary_mu) {
   if (!cb) return;
 
   // When executing the callback we need the primary flag's mutex to be
diff --git a/absl/flags/internal/flag.h b/absl/flags/internal/flag.h
index fad36877f74e..a84f7fa8d304 100644
--- a/absl/flags/internal/flag.h
+++ b/absl/flags/internal/flag.h
@@ -28,23 +28,22 @@ namespace flags_internal {
 using FlagCallback = void (*)();
 
 void InvokeCallback(absl::Mutex* primary_mu, absl::Mutex* callback_mu,
-                    FlagCallback cb) EXCLUSIVE_LOCKS_REQUIRED(primary_mu);
+                    FlagCallback cb) ABSL_EXCLUSIVE_LOCKS_REQUIRED(primary_mu);
 
 // This is "unspecified" implementation of absl::Flag<T> type.
 template <typename T>
 class Flag final : public flags_internal::CommandLineFlag {
  public:
-  constexpr Flag(const char* name_arg,
-                 const flags_internal::HelpGenFunc help_gen,
-                 const char* filename_arg,
-                 const flags_internal::FlagMarshallingOpFn marshalling_op_arg,
+  constexpr Flag(const char* name, const flags_internal::HelpGenFunc help_gen,
+                 const char* filename,
+                 const flags_internal::FlagMarshallingOpFn marshalling_op,
                  const flags_internal::InitialValGenFunc initial_value_gen)
       : flags_internal::CommandLineFlag(
-            name_arg, flags_internal::HelpText::FromFunctionPointer(help_gen),
-            filename_arg, &flags_internal::FlagOps<T>, marshalling_op_arg,
+            name, flags_internal::HelpText::FromFunctionPointer(help_gen),
+            filename, &flags_internal::FlagOps<T>, marshalling_op,
             initial_value_gen,
-            /*def_arg=*/nullptr,
-            /*cur_arg=*/nullptr),
+            /*def=*/nullptr,
+            /*cur=*/nullptr),
         callback_(nullptr) {}
 
   T Get() const {
@@ -71,12 +70,12 @@ class Flag final : public flags_internal::CommandLineFlag {
     };
     U u;
 
-    this->Read(&u.value, &flags_internal::FlagOps<T>);
+    Read(&u.value, &flags_internal::FlagOps<T>);
     return std::move(u.value);
   }
 
   bool AtomicGet(T* v) const {
-    const int64_t r = this->atomic.load(std::memory_order_acquire);
+    const int64_t r = atomic_.load(std::memory_order_acquire);
     if (r != flags_internal::CommandLineFlag::kAtomicInit) {
       memcpy(v, &r, sizeof(T));
       return true;
@@ -85,7 +84,7 @@ class Flag final : public flags_internal::CommandLineFlag {
     return false;
   }
 
-  void Set(const T& v) { this->Write(&v, &flags_internal::FlagOps<T>); }
+  void Set(const T& v) { Write(&v, &flags_internal::FlagOps<T>); }
 
   void SetCallback(const flags_internal::FlagCallback mutation_callback) {
     absl::MutexLock l(InitFlagIfNecessary());
@@ -95,18 +94,18 @@ class Flag final : public flags_internal::CommandLineFlag {
     InvokeCallback();
   }
   void InvokeCallback() override
-      EXCLUSIVE_LOCKS_REQUIRED(this->locks->primary_mu) {
-    flags_internal::InvokeCallback(&this->locks->primary_mu,
-                                   &this->locks->callback_mu, callback_);
+      ABSL_EXCLUSIVE_LOCKS_REQUIRED(locks_->primary_mu) {
+    flags_internal::InvokeCallback(&locks_->primary_mu, &locks_->callback_mu,
+                                   callback_);
   }
 
  private:
   void Destroy() const override {
     // Values are heap allocated Abseil Flags.
-    if (this->cur) Delete(this->op, this->cur);
-    if (this->def) Delete(this->op, this->def);
+    if (cur_) Delete(op_, cur_);
+    if (def_) Delete(op_, def_);
 
-    delete this->locks;
+    delete locks_;
   }
 
   // Flag's data
diff --git a/absl/flags/internal/program_name.cc b/absl/flags/internal/program_name.cc
index 62be645a96ca..f0811f144868 100644
--- a/absl/flags/internal/program_name.cc
+++ b/absl/flags/internal/program_name.cc
@@ -25,7 +25,7 @@ namespace flags_internal {
 
 ABSL_CONST_INIT static absl::Mutex program_name_guard(absl::kConstInit);
 ABSL_CONST_INIT static std::string* program_name
-    GUARDED_BY(program_name_guard) = nullptr;
+    ABSL_GUARDED_BY(program_name_guard) = nullptr;
 
 std::string ProgramInvocationName() {
   absl::MutexLock l(&program_name_guard);
diff --git a/absl/flags/internal/registry.cc b/absl/flags/internal/registry.cc
index 0d4eec982ba7..4bea313bb1eb 100644
--- a/absl/flags/internal/registry.cc
+++ b/absl/flags/internal/registry.cc
@@ -54,8 +54,8 @@ class FlagRegistry {
   // Store a flag in this registry.  Takes ownership of *flag.
   void RegisterFlag(CommandLineFlag* flag);
 
-  void Lock() EXCLUSIVE_LOCK_FUNCTION(lock_) { lock_.Lock(); }
-  void Unlock() UNLOCK_FUNCTION(lock_) { lock_.Unlock(); }
+  void Lock() ABSL_EXCLUSIVE_LOCK_FUNCTION(lock_) { lock_.Lock(); }
+  void Unlock() ABSL_UNLOCK_FUNCTION(lock_) { lock_.Unlock(); }
 
   // Returns the flag object for the specified name, or nullptr if not found.
   // Will emit a warning if a 'retired' flag is specified.
@@ -118,7 +118,7 @@ void FlagRegistry::RegisterFlag(CommandLineFlag* flag) {
               (flag->IsRetired() ? old_flag->Filename() : flag->Filename()),
               "'."),
           true);
-    } else if (flag->op != old_flag->op) {
+    } else if (flag->op_ != old_flag->op_) {
       flags_internal::ReportUsageError(
           absl::StrCat("Flag '", flag->Name(),
                        "' was defined more than once but with "
@@ -208,16 +208,16 @@ class FlagSaverImpl {
       if (flag->IsRetired()) return;
 
       saved.name = flag->Name();
-      saved.op = flag->op;
-      saved.marshalling_op = flag->marshalling_op;
+      saved.op = flag->op_;
+      saved.marshalling_op = flag->marshalling_op_;
       {
         absl::MutexLock l(flag->InitFlagIfNecessary());
         saved.validator = flag->GetValidator();
-        saved.modified = flag->modified;
-        saved.on_command_line = flag->on_command_line;
-        saved.current = Clone(saved.op, flag->cur);
-        saved.default_value = Clone(saved.op, flag->def);
-        saved.counter = flag->counter;
+        saved.modified = flag->modified_;
+        saved.on_command_line = flag->on_command_line_;
+        saved.current = Clone(saved.op, flag->cur_);
+        saved.default_value = Clone(saved.op, flag->def_);
+        saved.counter = flag->counter_;
       }
       backup_registry_.push_back(saved);
     });
@@ -237,26 +237,28 @@ class FlagSaverImpl {
 
       bool restored = false;
       {
-        absl::MutexLock l(flag->InitFlagIfNecessary());
+        // This function encapsulate the lock.
         flag->SetValidator(src.validator);
-        flag->modified = src.modified;
-        flag->on_command_line = src.on_command_line;
-        if (flag->counter != src.counter ||
-            ChangedDirectly(flag, src.default_value, flag->def)) {
+
+        absl::MutexLock l(flag->InitFlagIfNecessary());
+        flag->modified_ = src.modified;
+        flag->on_command_line_ = src.on_command_line;
+        if (flag->counter_ != src.counter ||
+            ChangedDirectly(flag, src.default_value, flag->def_)) {
           restored = true;
-          Copy(src.op, src.default_value, flag->def);
+          Copy(src.op, src.default_value, flag->def_);
         }
-        if (flag->counter != src.counter ||
-            ChangedDirectly(flag, src.current, flag->cur)) {
+        if (flag->counter_ != src.counter ||
+            ChangedDirectly(flag, src.current, flag->cur_)) {
           restored = true;
-          Copy(src.op, src.current, flag->cur);
+          Copy(src.op, src.current, flag->cur_);
           UpdateCopy(flag);
           flag->InvokeCallback();
         }
       }
 
       if (restored) {
-        flag->counter++;
+        flag->counter_++;
 
         // Revalidate the flag because the validator might store state based
         // on the flag's value, which just changed due to the restore.
@@ -308,44 +310,6 @@ FlagSaver::~FlagSaver() {
 }
 
 // --------------------------------------------------------------------
-// GetAllFlags()
-//    The main way the FlagRegistry class exposes its data.  This
-//    returns, as strings, all the info about all the flags in
-//    the main registry, sorted first by filename they are defined
-//    in, and then by flagname.
-// --------------------------------------------------------------------
-
-struct FilenameFlagnameLess {
-  bool operator()(const CommandLineFlagInfo& a,
-                  const CommandLineFlagInfo& b) const {
-    int cmp = absl::string_view(a.filename).compare(b.filename);
-    if (cmp != 0) return cmp < 0;
-    return a.name < b.name;
-  }
-};
-
-void FillCommandLineFlagInfo(CommandLineFlag* flag,
-                             CommandLineFlagInfo* result) {
-  result->name = std::string(flag->Name());
-  result->type = std::string(flag->Typename());
-  result->description = flag->Help();
-  result->filename = flag->Filename();
-
-  if (!flag->IsAbseilFlag()) {
-    if (!flag->IsModified() && ChangedDirectly(flag, flag->cur, flag->def)) {
-      flag->modified = true;
-    }
-  }
-
-  result->current_value = flag->CurrentValue();
-  result->default_value = flag->DefaultValue();
-  result->is_default = !flag->IsModified();
-  result->has_validator_fn = flag->HasValidatorFn();
-  absl::MutexLock l(flag->InitFlagIfNecessary());
-  result->flag_ptr = flag->IsAbseilFlag() ? nullptr : flag->cur;
-}
-
-// --------------------------------------------------------------------
 
 CommandLineFlag* FindCommandLineFlag(absl::string_view name) {
   if (name.empty()) return nullptr;
@@ -380,21 +344,6 @@ void ForEachFlag(std::function<void(CommandLineFlag*)> visitor) {
 
 // --------------------------------------------------------------------
 
-void GetAllFlags(std::vector<CommandLineFlagInfo>* OUTPUT) {
-  flags_internal::ForEachFlag([&](CommandLineFlag* flag) {
-    if (flag->IsRetired()) return;
-
-    CommandLineFlagInfo fi;
-    FillCommandLineFlagInfo(flag, &fi);
-    OUTPUT->push_back(fi);
-  });
-
-  // Now sort the flags, first by filename they occur in, then alphabetically
-  std::sort(OUTPUT->begin(), OUTPUT->end(), FilenameFlagnameLess());
-}
-
-// --------------------------------------------------------------------
-
 bool RegisterCommandLineFlag(CommandLineFlag* flag) {
   FlagRegistry::GlobalRegistry()->RegisterFlag(flag);
   return true;
@@ -406,24 +355,24 @@ namespace {
 
 class RetiredFlagObj final : public flags_internal::CommandLineFlag {
  public:
-  constexpr RetiredFlagObj(const char* name_arg, FlagOpFn ops,
+  constexpr RetiredFlagObj(const char* name, FlagOpFn ops,
                            FlagMarshallingOpFn marshalling_ops)
       : flags_internal::CommandLineFlag(
-            name_arg, flags_internal::HelpText::FromStaticCString(nullptr),
-            /*filename_arg=*/"RETIRED", ops, marshalling_ops,
+            name, flags_internal::HelpText::FromStaticCString(nullptr),
+            /*filename=*/"RETIRED", ops, marshalling_ops,
             /*initial_value_gen=*/nullptr,
-            /*def_arg=*/nullptr,
-            /*cur_arg=*/nullptr) {}
+            /*def=*/nullptr,
+            /*cur=*/nullptr) {}
 
  private:
   bool IsRetired() const override { return true; }
 
   void Destroy() const override {
     // Values are heap allocated for Retired Flags.
-    if (this->cur) Delete(this->op, this->cur);
-    if (this->def) Delete(this->op, this->def);
+    if (cur_) Delete(op_, cur_);
+    if (def_) Delete(op_, def_);
 
-    if (this->locks) delete this->locks;
+    if (locks_) delete locks_;
 
     delete this;
   }
diff --git a/absl/flags/internal/registry.h b/absl/flags/internal/registry.h
index 884a8db542fa..eb134a9f81e9 100644
--- a/absl/flags/internal/registry.h
+++ b/absl/flags/internal/registry.h
@@ -29,33 +29,6 @@
 namespace absl {
 namespace flags_internal {
 
-// CommandLineFlagInfo holds all information for a flag.
-struct CommandLineFlagInfo {
-  std::string name;           // the name of the flag
-  std::string type;           // DO NOT use. Use flag->IsOfType<T>() instead.
-  std::string description;    // the "help text" associated with the flag
-  std::string current_value;  // the current value, as a std::string
-  std::string default_value;  // the default value, as a std::string
-  std::string filename;       // 'cleaned' version of filename holding the flag
-  bool has_validator_fn;  // true if RegisterFlagValidator called on this flag
-
-  bool is_default;  // true if the flag has the default value and
-                    // has not been set explicitly from the cmdline
-                    // or via SetCommandLineOption.
-
-  // nullptr for ABSL_FLAG.  A pointer to the flag's current value
-  // otherwise.  E.g., for DEFINE_int32(foo, ...), flag_ptr will be
-  // &FLAGS_foo.
-  const void* flag_ptr;
-};
-
-//-----------------------------------------------------------------------------
-
-void FillCommandLineFlagInfo(CommandLineFlag* flag,
-                             CommandLineFlagInfo* result);
-
-//-----------------------------------------------------------------------------
-
 CommandLineFlag* FindCommandLineFlag(absl::string_view name);
 CommandLineFlag* FindRetiredFlag(absl::string_view name);
 
@@ -68,11 +41,6 @@ void ForEachFlag(std::function<void(CommandLineFlag*)> visitor);
 
 //-----------------------------------------------------------------------------
 
-// Store the list of all flags in *OUTPUT, sorted by file.
-void GetAllFlags(std::vector<CommandLineFlagInfo>* OUTPUT);
-
-//-----------------------------------------------------------------------------
-
 bool RegisterCommandLineFlag(CommandLineFlag*);
 
 //-----------------------------------------------------------------------------
diff --git a/absl/flags/internal/type_erased.cc b/absl/flags/internal/type_erased.cc
index 2984291c87c7..a1650fcf71e4 100644
--- a/absl/flags/internal/type_erased.cc
+++ b/absl/flags/internal/type_erased.cc
@@ -36,30 +36,6 @@ bool GetCommandLineOption(absl::string_view name, std::string* value) {
   return true;
 }
 
-bool GetCommandLineFlagInfo(absl::string_view name,
-                            CommandLineFlagInfo* OUTPUT) {
-  if (name.empty()) return false;
-
-  CommandLineFlag* flag = flags_internal::FindCommandLineFlag(name);
-  if (flag == nullptr || flag->IsRetired()) {
-    return false;
-  }
-
-  assert(OUTPUT);
-  FillCommandLineFlagInfo(flag, OUTPUT);
-  return true;
-}
-
-CommandLineFlagInfo GetCommandLineFlagInfoOrDie(absl::string_view name) {
-  CommandLineFlagInfo info;
-  if (!GetCommandLineFlagInfo(name, &info)) {
-    ABSL_INTERNAL_LOG(FATAL, absl::StrCat("Flag '", name, "' does not exist"));
-  }
-  return info;
-}
-
-// --------------------------------------------------------------------
-
 bool SetCommandLineOption(absl::string_view name, absl::string_view value) {
   return SetCommandLineOptionWithMode(name, value,
                                       flags_internal::SET_FLAGS_VALUE);
diff --git a/absl/flags/internal/type_erased.h b/absl/flags/internal/type_erased.h
index 249d36b9f33f..a955116628ff 100644
--- a/absl/flags/internal/type_erased.h
+++ b/absl/flags/internal/type_erased.h
@@ -32,17 +32,6 @@ namespace flags_internal {
 // Thread-safe.
 bool GetCommandLineOption(absl::string_view name, std::string* value);
 
-// If a flag named "name" exists, store its information in *OUTPUT
-// and return true.  Else return false without changing *OUTPUT.
-// Thread-safe.
-bool GetCommandLineFlagInfo(absl::string_view name,
-                            CommandLineFlagInfo* OUTPUT);
-
-// Returns the CommandLineFlagInfo of the flagname.  exit() with an
-// error code if name not found.
-// Thread-safe.
-CommandLineFlagInfo GetCommandLineFlagInfoOrDie(absl::string_view name);
-
 // Set the value of the flag named "name" to value.  If successful,
 // returns true.  If not successful (e.g., the flag was not found or
 // the value is not a valid value), returns false.
diff --git a/absl/flags/parse.cc b/absl/flags/parse.cc
index e9dd4204e8a8..16c4d68fc270 100644
--- a/absl/flags/parse.cc
+++ b/absl/flags/parse.cc
@@ -44,11 +44,11 @@ namespace {
 ABSL_CONST_INIT absl::Mutex processing_checks_guard(absl::kConstInit);
 
 ABSL_CONST_INIT bool flagfile_needs_processing
-    GUARDED_BY(processing_checks_guard) = false;
+    ABSL_GUARDED_BY(processing_checks_guard) = false;
 ABSL_CONST_INIT bool fromenv_needs_processing
-    GUARDED_BY(processing_checks_guard) = false;
+    ABSL_GUARDED_BY(processing_checks_guard) = false;
 ABSL_CONST_INIT bool tryfromenv_needs_processing
-    GUARDED_BY(processing_checks_guard) = false;
+    ABSL_GUARDED_BY(processing_checks_guard) = false;
 
 }  // namespace
 }  // namespace flags_internal
diff --git a/absl/flags/usage.cc b/absl/flags/usage.cc
index 4c01f5101291..dff7a3dab39c 100644
--- a/absl/flags/usage.cc
+++ b/absl/flags/usage.cc
@@ -24,7 +24,7 @@ namespace flags_internal {
 namespace {
 ABSL_CONST_INIT absl::Mutex usage_message_guard(absl::kConstInit);
 ABSL_CONST_INIT std::string* program_usage_message
-    GUARDED_BY(usage_message_guard) = nullptr;
+    ABSL_GUARDED_BY(usage_message_guard) = nullptr;
 }  // namespace
 }  // namespace flags_internal
 
diff --git a/absl/flags/usage_config.cc b/absl/flags/usage_config.cc
index d34ecfc82c7b..f97bf300dde7 100644
--- a/absl/flags/usage_config.cc
+++ b/absl/flags/usage_config.cc
@@ -94,7 +94,7 @@ std::string NormalizeFilename(absl::string_view filename) {
 
 ABSL_CONST_INIT absl::Mutex custom_usage_config_guard(absl::kConstInit);
 ABSL_CONST_INIT FlagsUsageConfig* custom_usage_config
-    GUARDED_BY(custom_usage_config_guard) = nullptr;
+    ABSL_GUARDED_BY(custom_usage_config_guard) = nullptr;
 
 }  // namespace
 
diff --git a/absl/random/internal/pool_urbg.cc b/absl/random/internal/pool_urbg.cc
index b24eeeffeaa9..f2e1c1f6fe26 100644
--- a/absl/random/internal/pool_urbg.cc
+++ b/absl/random/internal/pool_urbg.cc
@@ -59,13 +59,13 @@ class RandenPoolEntry {
   }
 
   // Copy bytes into out.
-  void Fill(uint8_t* out, size_t bytes) LOCKS_EXCLUDED(mu_);
+  void Fill(uint8_t* out, size_t bytes) ABSL_LOCKS_EXCLUDED(mu_);
 
   // Returns random bits from the buffer in units of T.
   template <typename T>
-  inline T Generate() LOCKS_EXCLUDED(mu_);
+  inline T Generate() ABSL_LOCKS_EXCLUDED(mu_);
 
-  inline void MaybeRefill() EXCLUSIVE_LOCKS_REQUIRED(mu_) {
+  inline void MaybeRefill() ABSL_EXCLUSIVE_LOCKS_REQUIRED(mu_) {
     if (next_ >= kState) {
       next_ = kCapacity;
       impl_.Generate(state_);
@@ -74,10 +74,10 @@ class RandenPoolEntry {
 
  private:
   // Randen URBG state.
-  uint32_t state_[kState] GUARDED_BY(mu_);  // First to satisfy alignment.
+  uint32_t state_[kState] ABSL_GUARDED_BY(mu_);  // First to satisfy alignment.
   SpinLock mu_;
   const Randen impl_;
-  size_t next_ GUARDED_BY(mu_);
+  size_t next_ ABSL_GUARDED_BY(mu_);
 };
 
 template <>
diff --git a/absl/synchronization/BUILD.bazel b/absl/synchronization/BUILD.bazel
index b48133883c7f..36dc98f39e7a 100644
--- a/absl/synchronization/BUILD.bazel
+++ b/absl/synchronization/BUILD.bazel
@@ -50,6 +50,21 @@ cc_library(
 )
 
 cc_library(
+    name = "kernel_timeout_internal",
+    hdrs = ["internal/kernel_timeout.h"],
+    copts = ABSL_DEFAULT_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
+    visibility = [
+        "//absl/synchronization:__pkg__",
+    ],
+    deps = [
+        "//absl/base:core_headers",
+        "//absl/base:raw_logging_internal",
+        "//absl/time",
+    ],
+)
+
+cc_library(
     name = "synchronization",
     srcs = [
         "barrier.cc",
@@ -65,7 +80,6 @@ cc_library(
         "barrier.h",
         "blocking_counter.h",
         "internal/create_thread_identity.h",
-        "internal/kernel_timeout.h",
         "internal/mutex_nonprod.inc",
         "internal/per_thread_sem.h",
         "internal/waiter.h",
@@ -79,6 +93,7 @@ cc_library(
     }) + ABSL_DEFAULT_LINKOPTS,
     deps = [
         ":graphcycles_internal",
+        ":kernel_timeout_internal",
         "//absl/base",
         "//absl/base:atomic_hook",
         "//absl/base:base_internal",
diff --git a/absl/synchronization/CMakeLists.txt b/absl/synchronization/CMakeLists.txt
index ce669c52c60b..3c47a1bca58b 100644
--- a/absl/synchronization/CMakeLists.txt
+++ b/absl/synchronization/CMakeLists.txt
@@ -33,12 +33,24 @@ absl_cc_library(
 
 absl_cc_library(
   NAME
+    kernel_timeout_internal
+  HDRS
+    "internal/kernel_timeout.h"
+  COPTS
+    ${ABSL_DEFAULT_COPTS}
+  DEPS
+    absl::core_headers
+    absl::raw_logging_internal
+    absl::time
+)
+
+absl_cc_library(
+  NAME
     synchronization
   HDRS
     "barrier.h"
     "blocking_counter.h"
     "internal/create_thread_identity.h"
-    "internal/kernel_timeout.h"
     "internal/mutex_nonprod.inc"
     "internal/per_thread_sem.h"
     "internal/waiter.h"
@@ -56,6 +68,7 @@ absl_cc_library(
     ${ABSL_DEFAULT_COPTS}
   DEPS
     absl::graphcycles_internal
+    absl::kernel_timeout_internal
     absl::atomic_hook
     absl::base
     absl::base_internal
diff --git a/absl/synchronization/barrier.h b/absl/synchronization/barrier.h
index 23bb2f58c7d6..cb5d821a2192 100644
--- a/absl/synchronization/barrier.h
+++ b/absl/synchronization/barrier.h
@@ -69,8 +69,8 @@ class Barrier {
 
  private:
   Mutex lock_;
-  int num_to_block_ GUARDED_BY(lock_);
-  int num_to_exit_ GUARDED_BY(lock_);
+  int num_to_block_ ABSL_GUARDED_BY(lock_);
+  int num_to_exit_ ABSL_GUARDED_BY(lock_);
 };
 
 }  // namespace absl
diff --git a/absl/synchronization/blocking_counter.h b/absl/synchronization/blocking_counter.h
index 4c66e0abf94b..77560fc05657 100644
--- a/absl/synchronization/blocking_counter.h
+++ b/absl/synchronization/blocking_counter.h
@@ -88,8 +88,8 @@ class BlockingCounter {
 
  private:
   Mutex lock_;
-  int count_ GUARDED_BY(lock_);
-  int num_waiting_ GUARDED_BY(lock_);
+  int count_ ABSL_GUARDED_BY(lock_);
+  int num_waiting_ ABSL_GUARDED_BY(lock_);
 };
 
 }  // namespace absl
diff --git a/absl/synchronization/internal/thread_pool.h b/absl/synchronization/internal/thread_pool.h
index 7f458f5a3a68..a00f2be8e892 100644
--- a/absl/synchronization/internal/thread_pool.h
+++ b/absl/synchronization/internal/thread_pool.h
@@ -60,7 +60,7 @@ class ThreadPool {
   }
 
  private:
-  bool WorkAvailable() const EXCLUSIVE_LOCKS_REQUIRED(mu_) {
+  bool WorkAvailable() const ABSL_EXCLUSIVE_LOCKS_REQUIRED(mu_) {
     return !queue_.empty();
   }
 
@@ -81,7 +81,7 @@ class ThreadPool {
   }
 
   absl::Mutex mu_;
-  std::queue<std::function<void()>> queue_ GUARDED_BY(mu_);
+  std::queue<std::function<void()>> queue_ ABSL_GUARDED_BY(mu_);
   std::vector<std::thread> threads_;
 };
 
diff --git a/absl/synchronization/lifetime_test.cc b/absl/synchronization/lifetime_test.cc
index 0279c8f8463a..34b8875b4b70 100644
--- a/absl/synchronization/lifetime_test.cc
+++ b/absl/synchronization/lifetime_test.cc
@@ -143,11 +143,11 @@ ABSL_CONST_INIT absl::Mutex early_const_init_mutex(absl::kConstInit);
 // constructors of globals "happen at link time"; memory is pre-initialized,
 // before the constructors of either grab_lock or check_still_locked are run.)
 extern absl::Mutex const_init_sanity_mutex;
-OnConstruction grab_lock([]() NO_THREAD_SAFETY_ANALYSIS {
+OnConstruction grab_lock([]() ABSL_NO_THREAD_SAFETY_ANALYSIS {
   const_init_sanity_mutex.Lock();
 });
 ABSL_CONST_INIT absl::Mutex const_init_sanity_mutex(absl::kConstInit);
-OnConstruction check_still_locked([]() NO_THREAD_SAFETY_ANALYSIS {
+OnConstruction check_still_locked([]() ABSL_NO_THREAD_SAFETY_ANALYSIS {
   const_init_sanity_mutex.AssertHeld();
   const_init_sanity_mutex.Unlock();
 });
diff --git a/absl/synchronization/mutex.cc b/absl/synchronization/mutex.cc
index 76bd307a4d41..100def2dd83b 100644
--- a/absl/synchronization/mutex.cc
+++ b/absl/synchronization/mutex.cc
@@ -207,8 +207,8 @@ static absl::base_internal::SpinLock deadlock_graph_mu(
     absl::base_internal::kLinkerInitialized);
 
 // graph used to detect deadlocks.
-static GraphCycles *deadlock_graph GUARDED_BY(deadlock_graph_mu)
-    PT_GUARDED_BY(deadlock_graph_mu);
+static GraphCycles *deadlock_graph ABSL_GUARDED_BY(deadlock_graph_mu)
+    ABSL_PT_GUARDED_BY(deadlock_graph_mu);
 
 //------------------------------------------------------------------
 // An event mechanism for debugging mutex use.
@@ -279,10 +279,10 @@ static const uint32_t kNSynchEvent = 1031;
 
 static struct SynchEvent {     // this is a trivial hash table for the events
   // struct is freed when refcount reaches 0
-  int refcount GUARDED_BY(synch_event_mu);
+  int refcount ABSL_GUARDED_BY(synch_event_mu);
 
   // buckets have linear, 0-terminated  chains
-  SynchEvent *next GUARDED_BY(synch_event_mu);
+  SynchEvent *next ABSL_GUARDED_BY(synch_event_mu);
 
   // Constant after initialization
   uintptr_t masked_addr;  // object at this address is called "name"
@@ -296,7 +296,7 @@ static struct SynchEvent {     // this is a trivial hash table for the events
 
   // Constant after initialization
   char name[1];         // actually longer---null-terminated std::string
-} *synch_event[kNSynchEvent] GUARDED_BY(synch_event_mu);
+} * synch_event[kNSynchEvent] ABSL_GUARDED_BY(synch_event_mu);
 
 // Ensure that the object at "addr" has a SynchEvent struct associated with it,
 // set "bits" in the word there (waiting until lockbit is clear before doing
@@ -1143,7 +1143,7 @@ PerThreadSynch *Mutex::Wakeup(PerThreadSynch *w) {
 }
 
 static GraphId GetGraphIdLocked(Mutex *mu)
-    EXCLUSIVE_LOCKS_REQUIRED(deadlock_graph_mu) {
+    ABSL_EXCLUSIVE_LOCKS_REQUIRED(deadlock_graph_mu) {
   if (!deadlock_graph) {  // (re)create the deadlock graph.
     deadlock_graph =
         new (base_internal::LowLevelAlloc::Alloc(sizeof(*deadlock_graph)))
@@ -1152,7 +1152,7 @@ static GraphId GetGraphIdLocked(Mutex *mu)
   return deadlock_graph->GetId(mu);
 }
 
-static GraphId GetGraphId(Mutex *mu) LOCKS_EXCLUDED(deadlock_graph_mu) {
+static GraphId GetGraphId(Mutex *mu) ABSL_LOCKS_EXCLUDED(deadlock_graph_mu) {
   deadlock_graph_mu.Lock();
   GraphId id = GetGraphIdLocked(mu);
   deadlock_graph_mu.Unlock();
diff --git a/absl/synchronization/mutex.h b/absl/synchronization/mutex.h
index c38e35616f76..d33318d347df 100644
--- a/absl/synchronization/mutex.h
+++ b/absl/synchronization/mutex.h
@@ -135,7 +135,7 @@ struct SynchWaitParams;
 //
 // See also `MutexLock`, below, for scoped `Mutex` acquisition.
 
-class LOCKABLE Mutex {
+class ABSL_LOCKABLE Mutex {
  public:
   // Creates a `Mutex` that is not held by anyone. This constructor is
   // typically used for Mutexes allocated on the heap or the stack.
@@ -164,27 +164,27 @@ class LOCKABLE Mutex {
   //
   // Blocks the calling thread, if necessary, until this `Mutex` is free, and
   // then acquires it exclusively. (This lock is also known as a "write lock.")
-  void Lock() EXCLUSIVE_LOCK_FUNCTION();
+  void Lock() ABSL_EXCLUSIVE_LOCK_FUNCTION();
 
   // Mutex::Unlock()
   //
   // Releases this `Mutex` and returns it from the exclusive/write state to the
   // free state. Caller must hold the `Mutex` exclusively.
-  void Unlock() UNLOCK_FUNCTION();
+  void Unlock() ABSL_UNLOCK_FUNCTION();
 
   // Mutex::TryLock()
   //
   // If the mutex can be acquired without blocking, does so exclusively and
   // returns `true`. Otherwise, returns `false`. Returns `true` with high
   // probability if the `Mutex` was free.
-  bool TryLock() EXCLUSIVE_TRYLOCK_FUNCTION(true);
+  bool TryLock() ABSL_EXCLUSIVE_TRYLOCK_FUNCTION(true);
 
   // Mutex::AssertHeld()
   //
   // Return immediately if this thread holds the `Mutex` exclusively (in write
   // mode). Otherwise, may report an error (typically by crashing with a
   // diagnostic), or may return immediately.
-  void AssertHeld() const ASSERT_EXCLUSIVE_LOCK();
+  void AssertHeld() const ABSL_ASSERT_EXCLUSIVE_LOCK();
 
   // ---------------------------------------------------------------------------
   // Reader-Writer Locking
@@ -225,28 +225,28 @@ class LOCKABLE Mutex {
   // `ReaderLock()` will block if some other thread has an exclusive/writer lock
   // on the mutex.
 
-  void ReaderLock() SHARED_LOCK_FUNCTION();
+  void ReaderLock() ABSL_SHARED_LOCK_FUNCTION();
 
   // Mutex::ReaderUnlock()
   //
   // Releases a read share of this `Mutex`. `ReaderUnlock` may return a mutex to
   // the free state if this thread holds the last reader lock on the mutex. Note
   // that you cannot call `ReaderUnlock()` on a mutex held in write mode.
-  void ReaderUnlock() UNLOCK_FUNCTION();
+  void ReaderUnlock() ABSL_UNLOCK_FUNCTION();
 
   // Mutex::ReaderTryLock()
   //
   // If the mutex can be acquired without blocking, acquires this mutex for
   // shared access and returns `true`. Otherwise, returns `false`. Returns
   // `true` with high probability if the `Mutex` was free or shared.
-  bool ReaderTryLock() SHARED_TRYLOCK_FUNCTION(true);
+  bool ReaderTryLock() ABSL_SHARED_TRYLOCK_FUNCTION(true);
 
   // Mutex::AssertReaderHeld()
   //
   // Returns immediately if this thread holds the `Mutex` in at least shared
   // mode (read mode). Otherwise, may report an error (typically by
   // crashing with a diagnostic), or may return immediately.
-  void AssertReaderHeld() const ASSERT_SHARED_LOCK();
+  void AssertReaderHeld() const ABSL_ASSERT_SHARED_LOCK();
 
   // Mutex::WriterLock()
   // Mutex::WriterUnlock()
@@ -257,11 +257,11 @@ class LOCKABLE Mutex {
   // These methods may be used (along with the complementary `Reader*()`
   // methods) to distingish simple exclusive `Mutex` usage (`Lock()`,
   // etc.) from reader/writer lock usage.
-  void WriterLock() EXCLUSIVE_LOCK_FUNCTION() { this->Lock(); }
+  void WriterLock() ABSL_EXCLUSIVE_LOCK_FUNCTION() { this->Lock(); }
 
-  void WriterUnlock() UNLOCK_FUNCTION() { this->Unlock(); }
+  void WriterUnlock() ABSL_UNLOCK_FUNCTION() { this->Unlock(); }
 
-  bool WriterTryLock() EXCLUSIVE_TRYLOCK_FUNCTION(true) {
+  bool WriterTryLock() ABSL_EXCLUSIVE_TRYLOCK_FUNCTION(true) {
     return this->TryLock();
   }
 
@@ -315,11 +315,11 @@ class LOCKABLE Mutex {
   // be acquired, then atomically acquires this `Mutex`. `LockWhen()` is
   // logically equivalent to `*Lock(); Await();` though they may have different
   // performance characteristics.
-  void LockWhen(const Condition &cond) EXCLUSIVE_LOCK_FUNCTION();
+  void LockWhen(const Condition &cond) ABSL_EXCLUSIVE_LOCK_FUNCTION();
 
-  void ReaderLockWhen(const Condition &cond) SHARED_LOCK_FUNCTION();
+  void ReaderLockWhen(const Condition &cond) ABSL_SHARED_LOCK_FUNCTION();
 
-  void WriterLockWhen(const Condition &cond) EXCLUSIVE_LOCK_FUNCTION() {
+  void WriterLockWhen(const Condition &cond) ABSL_EXCLUSIVE_LOCK_FUNCTION() {
     this->LockWhen(cond);
   }
 
@@ -361,11 +361,11 @@ class LOCKABLE Mutex {
   //
   // Negative timeouts are equivalent to a zero timeout.
   bool LockWhenWithTimeout(const Condition &cond, absl::Duration timeout)
-      EXCLUSIVE_LOCK_FUNCTION();
+      ABSL_EXCLUSIVE_LOCK_FUNCTION();
   bool ReaderLockWhenWithTimeout(const Condition &cond, absl::Duration timeout)
-      SHARED_LOCK_FUNCTION();
+      ABSL_SHARED_LOCK_FUNCTION();
   bool WriterLockWhenWithTimeout(const Condition &cond, absl::Duration timeout)
-      EXCLUSIVE_LOCK_FUNCTION() {
+      ABSL_EXCLUSIVE_LOCK_FUNCTION() {
     return this->LockWhenWithTimeout(cond, timeout);
   }
 
@@ -381,11 +381,11 @@ class LOCKABLE Mutex {
   //
   // Deadlines in the past are equivalent to an immediate deadline.
   bool LockWhenWithDeadline(const Condition &cond, absl::Time deadline)
-      EXCLUSIVE_LOCK_FUNCTION();
+      ABSL_EXCLUSIVE_LOCK_FUNCTION();
   bool ReaderLockWhenWithDeadline(const Condition &cond, absl::Time deadline)
-      SHARED_LOCK_FUNCTION();
+      ABSL_SHARED_LOCK_FUNCTION();
   bool WriterLockWhenWithDeadline(const Condition &cond, absl::Time deadline)
-      EXCLUSIVE_LOCK_FUNCTION() {
+      ABSL_EXCLUSIVE_LOCK_FUNCTION() {
     return this->LockWhenWithDeadline(cond, deadline);
   }
 
@@ -535,9 +535,9 @@ class LOCKABLE Mutex {
 // private:
 //   Mutex lock_;
 // };
-class SCOPED_LOCKABLE MutexLock {
+class ABSL_SCOPED_LOCKABLE MutexLock {
  public:
-  explicit MutexLock(Mutex *mu) EXCLUSIVE_LOCK_FUNCTION(mu) : mu_(mu) {
+  explicit MutexLock(Mutex *mu) ABSL_EXCLUSIVE_LOCK_FUNCTION(mu) : mu_(mu) {
     this->mu_->Lock();
   }
 
@@ -546,7 +546,7 @@ class SCOPED_LOCKABLE MutexLock {
   MutexLock& operator=(const MutexLock&) = delete;
   MutexLock& operator=(MutexLock&&) = delete;
 
-  ~MutexLock() UNLOCK_FUNCTION() { this->mu_->Unlock(); }
+  ~MutexLock() ABSL_UNLOCK_FUNCTION() { this->mu_->Unlock(); }
 
  private:
   Mutex *const mu_;
@@ -556,10 +556,9 @@ class SCOPED_LOCKABLE MutexLock {
 //
 // The `ReaderMutexLock` is a helper class, like `MutexLock`, which acquires and
 // releases a shared lock on a `Mutex` via RAII.
-class SCOPED_LOCKABLE ReaderMutexLock {
+class ABSL_SCOPED_LOCKABLE ReaderMutexLock {
  public:
-  explicit ReaderMutexLock(Mutex *mu) SHARED_LOCK_FUNCTION(mu)
-      :  mu_(mu) {
+  explicit ReaderMutexLock(Mutex *mu) ABSL_SHARED_LOCK_FUNCTION(mu) : mu_(mu) {
     mu->ReaderLock();
   }
 
@@ -568,9 +567,7 @@ class SCOPED_LOCKABLE ReaderMutexLock {
   ReaderMutexLock& operator=(const ReaderMutexLock&) = delete;
   ReaderMutexLock& operator=(ReaderMutexLock&&) = delete;
 
-  ~ReaderMutexLock() UNLOCK_FUNCTION() {
-    this->mu_->ReaderUnlock();
-  }
+  ~ReaderMutexLock() ABSL_UNLOCK_FUNCTION() { this->mu_->ReaderUnlock(); }
 
  private:
   Mutex *const mu_;
@@ -580,9 +577,9 @@ class SCOPED_LOCKABLE ReaderMutexLock {
 //
 // The `WriterMutexLock` is a helper class, like `MutexLock`, which acquires and
 // releases a write (exclusive) lock on a `Mutex` via RAII.
-class SCOPED_LOCKABLE WriterMutexLock {
+class ABSL_SCOPED_LOCKABLE WriterMutexLock {
  public:
-  explicit WriterMutexLock(Mutex *mu) EXCLUSIVE_LOCK_FUNCTION(mu)
+  explicit WriterMutexLock(Mutex *mu) ABSL_EXCLUSIVE_LOCK_FUNCTION(mu)
       : mu_(mu) {
     mu->WriterLock();
   }
@@ -592,9 +589,7 @@ class SCOPED_LOCKABLE WriterMutexLock {
   WriterMutexLock& operator=(const WriterMutexLock&) = delete;
   WriterMutexLock& operator=(WriterMutexLock&&) = delete;
 
-  ~WriterMutexLock() UNLOCK_FUNCTION() {
-    this->mu_->WriterUnlock();
-  }
+  ~WriterMutexLock() ABSL_UNLOCK_FUNCTION() { this->mu_->WriterUnlock(); }
 
  private:
   Mutex *const mu_;
@@ -860,13 +855,18 @@ class CondVar {
 // MutexLockMaybe
 //
 // MutexLockMaybe is like MutexLock, but is a no-op when mu is null.
-class SCOPED_LOCKABLE MutexLockMaybe {
+class ABSL_SCOPED_LOCKABLE MutexLockMaybe {
  public:
-  explicit MutexLockMaybe(Mutex *mu) EXCLUSIVE_LOCK_FUNCTION(mu)
-      : mu_(mu) { if (this->mu_ != nullptr) { this->mu_->Lock(); } }
-  ~MutexLockMaybe() UNLOCK_FUNCTION() {
+  explicit MutexLockMaybe(Mutex *mu) ABSL_EXCLUSIVE_LOCK_FUNCTION(mu)
+      : mu_(mu) {
+    if (this->mu_ != nullptr) {
+      this->mu_->Lock();
+    }
+  }
+  ~MutexLockMaybe() ABSL_UNLOCK_FUNCTION() {
     if (this->mu_ != nullptr) { this->mu_->Unlock(); }
   }
+
  private:
   Mutex *const mu_;
   MutexLockMaybe(const MutexLockMaybe&) = delete;
@@ -879,17 +879,17 @@ class SCOPED_LOCKABLE MutexLockMaybe {
 //
 // ReleasableMutexLock is like MutexLock, but permits `Release()` of its
 // mutex before destruction. `Release()` may be called at most once.
-class SCOPED_LOCKABLE ReleasableMutexLock {
+class ABSL_SCOPED_LOCKABLE ReleasableMutexLock {
  public:
-  explicit ReleasableMutexLock(Mutex *mu) EXCLUSIVE_LOCK_FUNCTION(mu)
+  explicit ReleasableMutexLock(Mutex *mu) ABSL_EXCLUSIVE_LOCK_FUNCTION(mu)
       : mu_(mu) {
     this->mu_->Lock();
   }
-  ~ReleasableMutexLock() UNLOCK_FUNCTION() {
+  ~ReleasableMutexLock() ABSL_UNLOCK_FUNCTION() {
     if (this->mu_ != nullptr) { this->mu_->Unlock(); }
   }
 
-  void Release() UNLOCK_FUNCTION();
+  void Release() ABSL_UNLOCK_FUNCTION();
 
  private:
   Mutex *mu_;
diff --git a/absl/synchronization/mutex_test.cc b/absl/synchronization/mutex_test.cc
index 9851ac19824a..afb363af6127 100644
--- a/absl/synchronization/mutex_test.cc
+++ b/absl/synchronization/mutex_test.cc
@@ -425,10 +425,10 @@ TEST(Mutex, CondVarWaitSignalsAwait) {
   // Use a struct so the lock annotations apply.
   struct {
     absl::Mutex barrier_mu;
-    bool barrier GUARDED_BY(barrier_mu) = false;
+    bool barrier ABSL_GUARDED_BY(barrier_mu) = false;
 
     absl::Mutex release_mu;
-    bool release GUARDED_BY(release_mu) = false;
+    bool release ABSL_GUARDED_BY(release_mu) = false;
     absl::CondVar released_cv;
   } state;
 
@@ -466,10 +466,10 @@ TEST(Mutex, CondVarWaitWithTimeoutSignalsAwait) {
   // Use a struct so the lock annotations apply.
   struct {
     absl::Mutex barrier_mu;
-    bool barrier GUARDED_BY(barrier_mu) = false;
+    bool barrier ABSL_GUARDED_BY(barrier_mu) = false;
 
     absl::Mutex release_mu;
-    bool release GUARDED_BY(release_mu) = false;
+    bool release ABSL_GUARDED_BY(release_mu) = false;
     absl::CondVar released_cv;
   } state;
 
@@ -770,7 +770,7 @@ static void GetReadLock(ReaderDecrementBugStruct *x) {
 
 // Test for reader counter being decremented incorrectly by waiter
 // with false condition.
-TEST(Mutex, MutexReaderDecrementBug) NO_THREAD_SAFETY_ANALYSIS {
+TEST(Mutex, MutexReaderDecrementBug) ABSL_NO_THREAD_SAFETY_ANALYSIS {
   ReaderDecrementBugStruct x;
   x.cond = false;
   x.waiting_on_cond = false;
@@ -819,7 +819,7 @@ TEST(Mutex, MutexReaderDecrementBug) NO_THREAD_SAFETY_ANALYSIS {
 // TSAN reports errors when locked Mutexes are destroyed.
 TEST(Mutex, DISABLED_LockedMutexDestructionBug) NO_THREAD_SAFETY_ANALYSIS {
 #else
-TEST(Mutex, LockedMutexDestructionBug) NO_THREAD_SAFETY_ANALYSIS {
+TEST(Mutex, LockedMutexDestructionBug) ABSL_NO_THREAD_SAFETY_ANALYSIS {
 #endif
   for (int i = 0; i != 10; i++) {
     // Create, lock and destroy 10 locks.
@@ -1101,7 +1101,7 @@ TEST(Mutex, DeadlockDetectorBazelWarning) {
 // annotation-based static thread-safety analysis is not currently
 // predicate-aware and cannot tell if the two for-loops that acquire and
 // release the locks have the same predicates.
-TEST(Mutex, DeadlockDetectorStessTest) NO_THREAD_SAFETY_ANALYSIS {
+TEST(Mutex, DeadlockDetectorStessTest) ABSL_NO_THREAD_SAFETY_ANALYSIS {
   // Stress test: Here we create a large number of locks and use all of them.
   // If a deadlock detector keeps a full graph of lock acquisition order,
   // it will likely be too slow for this test to pass.
@@ -1123,7 +1123,7 @@ TEST(Mutex, DeadlockDetectorStessTest) NO_THREAD_SAFETY_ANALYSIS {
 // TSAN reports errors when locked Mutexes are destroyed.
 TEST(Mutex, DISABLED_DeadlockIdBug) NO_THREAD_SAFETY_ANALYSIS {
 #else
-TEST(Mutex, DeadlockIdBug) NO_THREAD_SAFETY_ANALYSIS {
+TEST(Mutex, DeadlockIdBug) ABSL_NO_THREAD_SAFETY_ANALYSIS {
 #endif
   // Test a scenario where a cached deadlock graph node id in the
   // list of held locks is not invalidated when the corresponding
diff --git a/absl/time/time.h b/absl/time/time.h
index cebbc91b8ff3..9c8f31774ac6 100644
--- a/absl/time/time.h
+++ b/absl/time/time.h
@@ -1103,7 +1103,7 @@ inline Time FromCivil(CivilSecond ct, TimeZone tz) {
 // An `absl::TimeConversion` represents the conversion of year, month, day,
 // hour, minute, and second values (i.e., a civil time), in a particular
 // `absl::TimeZone`, to a time instant (an absolute time), as returned by
-// `absl::ConvertDateTime()`. Lecacy version of `absl::TimeZone::TimeInfo`.
+// `absl::ConvertDateTime()`. Legacy version of `absl::TimeZone::TimeInfo`.
 //
 // Deprecated. Use `absl::TimeZone::TimeInfo`.
 struct