diff --git a/libc/bionic/grp_pwd_file.h b/libc/bionic/grp_pwd_file.h
index 29d75f4..9004c4e 100644
--- a/libc/bionic/grp_pwd_file.h
+++ b/libc/bionic/grp_pwd_file.h
@@ -45,7 +45,7 @@
   bool FindByName(const char* name, Line* line);
   void Unmap();
 
-  DISALLOW_COPY_AND_ASSIGN(MmapFile);
+  BIONIC_DISALLOW_IMPLICIT_CONSTRUCTORS(MmapFile);
 
  private:
   enum class FileStatus {
@@ -78,7 +78,7 @@
     mmap_file_.Unmap();
   }
 
-  DISALLOW_COPY_AND_ASSIGN(PasswdFile);
+  BIONIC_DISALLOW_IMPLICIT_CONSTRUCTORS(PasswdFile);
 
  private:
   MmapFile mmap_file_;
@@ -94,7 +94,7 @@
     mmap_file_.Unmap();
   }
 
-  DISALLOW_COPY_AND_ASSIGN(GroupFile);
+  BIONIC_DISALLOW_IMPLICIT_CONSTRUCTORS(GroupFile);
 
  private:
   MmapFile mmap_file_;
diff --git a/libc/bionic/locale.cpp b/libc/bionic/locale.cpp
index 2a5bcab..8358fb0 100644
--- a/libc/bionic/locale.cpp
+++ b/libc/bionic/locale.cpp
@@ -66,7 +66,7 @@
     }
   }
 
-  DISALLOW_COPY_AND_ASSIGN(__locale_t);
+  BIONIC_DISALLOW_IMPLICIT_CONSTRUCTORS(__locale_t);
 };
 
 size_t __ctype_get_mb_cur_max() {
diff --git a/libc/bionic/malloc_info.cpp b/libc/bionic/malloc_info.cpp
index 99caedb..9c8a4bf 100644
--- a/libc/bionic/malloc_info.cpp
+++ b/libc/bionic/malloc_info.cpp
@@ -53,7 +53,7 @@
   FILE* fp;
   const char* name;
 
-  DISALLOW_COPY_AND_ASSIGN(Elem);
+  BIONIC_DISALLOW_IMPLICIT_CONSTRUCTORS(Elem);
 };
 
 int malloc_info(int options, FILE* fp) {
diff --git a/libc/bionic/pthread_atfork.cpp b/libc/bionic/pthread_atfork.cpp
index 84e511c..fb12a3b 100644
--- a/libc/bionic/pthread_atfork.cpp
+++ b/libc/bionic/pthread_atfork.cpp
@@ -107,7 +107,7 @@
   atfork_t* first_;
   atfork_t* last_;
 
-  DISALLOW_COPY_AND_ASSIGN(atfork_list_t);
+  BIONIC_DISALLOW_COPY_AND_ASSIGN(atfork_list_t);
 };
 
 static pthread_mutex_t g_atfork_list_mutex = PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP;
@@ -180,4 +180,3 @@
   });
   pthread_mutex_unlock(&g_atfork_list_mutex);
 }
-
diff --git a/libc/bionic/pthread_internal.cpp b/libc/bionic/pthread_internal.cpp
index 829194c..92786fe 100644
--- a/libc/bionic/pthread_internal.cpp
+++ b/libc/bionic/pthread_internal.cpp
@@ -54,7 +54,7 @@
 
  private:
   pthread_rwlock_t* rwlock_;
-  DISALLOW_IMPLICIT_CONSTRUCTORS(ScopedRWLock);
+  BIONIC_DISALLOW_IMPLICIT_CONSTRUCTORS(ScopedRWLock);
 };
 
 typedef ScopedRWLock<true> ScopedWriteLock;
diff --git a/libc/bionic/scandir.cpp b/libc/bionic/scandir.cpp
index e55be42..0b39049 100644
--- a/libc/bionic/scandir.cpp
+++ b/libc/bionic/scandir.cpp
@@ -90,7 +90,7 @@
     return copy;
   }
 
-  DISALLOW_COPY_AND_ASSIGN(ScandirResult);
+  BIONIC_DISALLOW_COPY_AND_ASSIGN(ScandirResult);
 };
 
 int scandirat(int parent_fd, const char* dir_name, dirent*** name_list,
diff --git a/libc/bionic/system_property_set.cpp b/libc/bionic/system_property_set.cpp
index a70a376..bc3ba76 100644
--- a/libc/bionic/system_property_set.cpp
+++ b/libc/bionic/system_property_set.cpp
@@ -170,7 +170,7 @@
   uint32_t uint_buf_[kUintBufSize];
   size_t uint_buf_index_;
 
-  DISALLOW_IMPLICIT_CONSTRUCTORS(SocketWriter);
+  BIONIC_DISALLOW_IMPLICIT_CONSTRUCTORS(SocketWriter);
 };
 
 struct prop_msg {
diff --git a/libc/malloc_debug/DebugData.h b/libc/malloc_debug/DebugData.h
index f7cf8ab..3a36299 100644
--- a/libc/malloc_debug/DebugData.h
+++ b/libc/malloc_debug/DebugData.h
@@ -94,7 +94,7 @@
 
   Config config_;
 
-  DISALLOW_COPY_AND_ASSIGN(DebugData);
+  BIONIC_DISALLOW_COPY_AND_ASSIGN(DebugData);
 };
 
 extern DebugData* g_debug;
diff --git a/libc/malloc_debug/GuardData.h b/libc/malloc_debug/GuardData.h
index 7b21671..b6ec889 100644
--- a/libc/malloc_debug/GuardData.h
+++ b/libc/malloc_debug/GuardData.h
@@ -56,7 +56,7 @@
 
   virtual const char* GetTypeName() = 0;
 
-  DISALLOW_COPY_AND_ASSIGN(GuardData);
+  BIONIC_DISALLOW_COPY_AND_ASSIGN(GuardData);
 };
 
 class FrontGuardData : public GuardData {
@@ -75,7 +75,7 @@
 
   size_t offset_ = 0;
 
-  DISALLOW_COPY_AND_ASSIGN(FrontGuardData);
+  BIONIC_DISALLOW_COPY_AND_ASSIGN(FrontGuardData);
 };
 
 class RearGuardData : public GuardData {
@@ -90,5 +90,5 @@
  private:
   const char* GetTypeName() override { return "REAR"; }
 
-  DISALLOW_COPY_AND_ASSIGN(RearGuardData);
+  BIONIC_DISALLOW_COPY_AND_ASSIGN(RearGuardData);
 };
diff --git a/libc/malloc_debug/MapData.h b/libc/malloc_debug/MapData.h
index d8398bd..b9b697c 100644
--- a/libc/malloc_debug/MapData.h
+++ b/libc/malloc_debug/MapData.h
@@ -68,5 +68,5 @@
   std::mutex m_;
   std::set<MapEntry*, compare_entries> entries_;
 
-  DISALLOW_COPY_AND_ASSIGN(MapData);
+  BIONIC_DISALLOW_COPY_AND_ASSIGN(MapData);
 };
diff --git a/libc/malloc_debug/OptionData.h b/libc/malloc_debug/OptionData.h
index 3fa8e14..8fb13a4 100644
--- a/libc/malloc_debug/OptionData.h
+++ b/libc/malloc_debug/OptionData.h
@@ -39,5 +39,5 @@
  protected:
   DebugData* debug_;
 
-  DISALLOW_COPY_AND_ASSIGN(OptionData);
+  BIONIC_DISALLOW_COPY_AND_ASSIGN(OptionData);
 };
diff --git a/libc/malloc_debug/PointerData.h b/libc/malloc_debug/PointerData.h
index 62d4186..b05a763 100644
--- a/libc/malloc_debug/PointerData.h
+++ b/libc/malloc_debug/PointerData.h
@@ -184,5 +184,5 @@
   static std::mutex free_pointer_mutex_;
   static std::deque<FreePointerInfoType> free_pointers_;
 
-  DISALLOW_COPY_AND_ASSIGN(PointerData);
+  BIONIC_DISALLOW_COPY_AND_ASSIGN(PointerData);
 };
diff --git a/libc/malloc_debug/RecordData.h b/libc/malloc_debug/RecordData.h
index 3e5ca02..a015882 100644
--- a/libc/malloc_debug/RecordData.h
+++ b/libc/malloc_debug/RecordData.h
@@ -49,7 +49,7 @@
   pid_t tid_;
 
  private:
-  DISALLOW_COPY_AND_ASSIGN(RecordEntry);
+  BIONIC_DISALLOW_COPY_AND_ASSIGN(RecordEntry);
 };
 
 class ThreadCompleteEntry : public RecordEntry {
@@ -60,7 +60,7 @@
   std::string GetString() const override;
 
  private:
-  DISALLOW_COPY_AND_ASSIGN(ThreadCompleteEntry);
+  BIONIC_DISALLOW_COPY_AND_ASSIGN(ThreadCompleteEntry);
 };
 
 class AllocEntry : public RecordEntry {
@@ -72,7 +72,7 @@
   void* pointer_;
 
  private:
-  DISALLOW_COPY_AND_ASSIGN(AllocEntry);
+  BIONIC_DISALLOW_COPY_AND_ASSIGN(AllocEntry);
 };
 
 class MallocEntry : public AllocEntry {
@@ -86,7 +86,7 @@
   size_t size_;
 
  private:
-  DISALLOW_COPY_AND_ASSIGN(MallocEntry);
+  BIONIC_DISALLOW_COPY_AND_ASSIGN(MallocEntry);
 };
 
 class FreeEntry : public AllocEntry {
@@ -97,7 +97,7 @@
   std::string GetString() const override;
 
  private:
-  DISALLOW_COPY_AND_ASSIGN(FreeEntry);
+  BIONIC_DISALLOW_COPY_AND_ASSIGN(FreeEntry);
 };
 
 class CallocEntry : public MallocEntry {
@@ -111,7 +111,7 @@
   size_t nmemb_;
 
  private:
-  DISALLOW_COPY_AND_ASSIGN(CallocEntry);
+  BIONIC_DISALLOW_COPY_AND_ASSIGN(CallocEntry);
 };
 
 class ReallocEntry : public MallocEntry {
@@ -125,7 +125,7 @@
   void* old_pointer_;
 
  private:
-  DISALLOW_COPY_AND_ASSIGN(ReallocEntry);
+  BIONIC_DISALLOW_COPY_AND_ASSIGN(ReallocEntry);
 };
 
 // aligned_alloc, posix_memalign, memalign, pvalloc, valloc all recorded with this class.
@@ -140,7 +140,7 @@
   size_t alignment_;
 
  private:
-  DISALLOW_COPY_AND_ASSIGN(MemalignEntry);
+  BIONIC_DISALLOW_COPY_AND_ASSIGN(MemalignEntry);
 };
 
 class Config;
@@ -170,5 +170,5 @@
   std::atomic_bool dump_;
   std::string dump_file_;
 
-  DISALLOW_COPY_AND_ASSIGN(RecordData);
+  BIONIC_DISALLOW_COPY_AND_ASSIGN(RecordData);
 };
diff --git a/libc/malloc_debug/debug_disable.h b/libc/malloc_debug/debug_disable.h
index 0049595..f9c3149 100644
--- a/libc/malloc_debug/debug_disable.h
+++ b/libc/malloc_debug/debug_disable.h
@@ -57,5 +57,5 @@
  private:
   bool disabled_;
 
-  DISALLOW_COPY_AND_ASSIGN(ScopedDisableDebugCalls);
+  BIONIC_DISALLOW_COPY_AND_ASSIGN(ScopedDisableDebugCalls);
 };
diff --git a/libc/private/ErrnoRestorer.h b/libc/private/ErrnoRestorer.h
index f467393..52e115a 100644
--- a/libc/private/ErrnoRestorer.h
+++ b/libc/private/ErrnoRestorer.h
@@ -14,8 +14,7 @@
  * limitations under the License.
  */
 
-#ifndef ERRNO_RESTORER_H
-#define ERRNO_RESTORER_H
+#pragma once
 
 #include <errno.h>
 
@@ -37,7 +36,5 @@
  private:
   int saved_errno_;
 
-  DISALLOW_COPY_AND_ASSIGN(ErrnoRestorer);
+  BIONIC_DISALLOW_COPY_AND_ASSIGN(ErrnoRestorer);
 };
-
-#endif // ERRNO_RESTORER_H
diff --git a/libc/private/KernelArgumentBlock.h b/libc/private/KernelArgumentBlock.h
index e05ceb9..886dd32 100644
--- a/libc/private/KernelArgumentBlock.h
+++ b/libc/private/KernelArgumentBlock.h
@@ -14,8 +14,7 @@
  * limitations under the License.
  */
 
-#ifndef KERNEL_ARGUMENT_BLOCK_H
-#define KERNEL_ARGUMENT_BLOCK_H
+#pragma once
 
 #include <elf.h>
 #include <link.h>
@@ -71,7 +70,5 @@
   libc_shared_globals* shared_globals;
 
  private:
-  DISALLOW_COPY_AND_ASSIGN(KernelArgumentBlock);
+  BIONIC_DISALLOW_COPY_AND_ASSIGN(KernelArgumentBlock);
 };
-
-#endif // KERNEL_ARGUMENT_BLOCK_H
diff --git a/libc/private/ScopedPthreadMutexLocker.h b/libc/private/ScopedPthreadMutexLocker.h
index 58462e3..1c1e4a7 100644
--- a/libc/private/ScopedPthreadMutexLocker.h
+++ b/libc/private/ScopedPthreadMutexLocker.h
@@ -14,8 +14,7 @@
  * limitations under the License.
  */
 
-#ifndef SCOPED_PTHREAD_MUTEX_LOCKER_H
-#define SCOPED_PTHREAD_MUTEX_LOCKER_H
+#pragma once
 
 #include <pthread.h>
 
@@ -34,7 +33,5 @@
  private:
   pthread_mutex_t* mu_;
 
-  DISALLOW_IMPLICIT_CONSTRUCTORS(ScopedPthreadMutexLocker);
+  BIONIC_DISALLOW_IMPLICIT_CONSTRUCTORS(ScopedPthreadMutexLocker);
 };
-
-#endif // SCOPED_PTHREAD_MUTEX_LOCKER_H
diff --git a/libc/private/ScopedReaddir.h b/libc/private/ScopedReaddir.h
index 1a59e1a..dc22309 100644
--- a/libc/private/ScopedReaddir.h
+++ b/libc/private/ScopedReaddir.h
@@ -14,8 +14,7 @@
  * limitations under the License.
  */
 
-#ifndef SCOPED_READDIR_H
-#define SCOPED_READDIR_H
+#pragma once
 
 #include <dirent.h>
 
@@ -47,7 +46,5 @@
  private:
   DIR* dir_;
 
-  DISALLOW_COPY_AND_ASSIGN(ScopedReaddir);
+  BIONIC_DISALLOW_COPY_AND_ASSIGN(ScopedReaddir);
 };
-
-#endif // SCOPED_READDIR_H
diff --git a/libc/private/ScopedSignalBlocker.h b/libc/private/ScopedSignalBlocker.h
index d1cf629..10aacb3 100644
--- a/libc/private/ScopedSignalBlocker.h
+++ b/libc/private/ScopedSignalBlocker.h
@@ -46,5 +46,5 @@
 
   sigset64_t old_set_;
 
-  DISALLOW_COPY_AND_ASSIGN(ScopedSignalBlocker);
+  BIONIC_DISALLOW_COPY_AND_ASSIGN(ScopedSignalBlocker);
 };
diff --git a/libc/private/WriteProtected.h b/libc/private/WriteProtected.h
index 7a6b098..69a6822 100644
--- a/libc/private/WriteProtected.h
+++ b/libc/private/WriteProtected.h
@@ -14,8 +14,7 @@
  * limitations under the License.
  */
 
-#ifndef _PRIVATE_WRITEPROTECTED_H
-#define _PRIVATE_WRITEPROTECTED_H
+#pragma once
 
 #include <errno.h>
 #include <string.h>
@@ -33,7 +32,7 @@
   char padding[PAGE_SIZE];
 
   WriteProtectedContents() = default;
-  DISALLOW_COPY_AND_ASSIGN(WriteProtectedContents);
+  BIONIC_DISALLOW_COPY_AND_ASSIGN(WriteProtectedContents);
 } __attribute__((aligned(PAGE_SIZE)));
 
 // Write protected wrapper class that aligns its contents to a page boundary,
@@ -49,7 +48,7 @@
 
  public:
   WriteProtected() = default;
-  DISALLOW_COPY_AND_ASSIGN(WriteProtected);
+  BIONIC_DISALLOW_COPY_AND_ASSIGN(WriteProtected);
 
   void initialize() {
     // Not strictly necessary, but this will hopefully segfault if we initialize
@@ -82,5 +81,3 @@
     }
   }
 };
-
-#endif
diff --git a/libc/private/bionic_lock.h b/libc/private/bionic_lock.h
index 54168d3..eebfeff 100644
--- a/libc/private/bionic_lock.h
+++ b/libc/private/bionic_lock.h
@@ -25,8 +25,8 @@
  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
  */
-#ifndef _BIONIC_LOCK_H
-#define _BIONIC_LOCK_H
+
+#pragma once
 
 #include <stdatomic.h>
 #include "private/bionic_futex.h"
@@ -85,10 +85,8 @@
     lock_.unlock();
   }
 
-  DISALLOW_COPY_AND_ASSIGN(LockGuard);
+  BIONIC_DISALLOW_COPY_AND_ASSIGN(LockGuard);
 
  private:
   Lock& lock_;
 };
-
-#endif  // _BIONIC_LOCK_H
diff --git a/libc/private/bionic_macros.h b/libc/private/bionic_macros.h
index 0a36cdb..4800e3a 100644
--- a/libc/private/bionic_macros.h
+++ b/libc/private/bionic_macros.h
@@ -14,31 +14,17 @@
  * limitations under the License.
  */
 
-#ifndef _BIONIC_MACROS_H_
-#define _BIONIC_MACROS_H_
+#pragma once
 
 #include <stdint.h>
 
-// Frameworks OpenGL code currently leaks this header and allows
-// collisions with other declarations, e.g., from libnativehelper.
-// TODO: Remove once cleaned up. b/18334516
-#if !defined(DISALLOW_COPY_AND_ASSIGN)
-// DISALLOW_COPY_AND_ASSIGN disallows the copy and operator= functions.
-// It goes in the private: declarations in a class.
-#define DISALLOW_COPY_AND_ASSIGN(TypeName) \
-  TypeName(const TypeName&) = delete;      \
+#define BIONIC_DISALLOW_COPY_AND_ASSIGN(TypeName) \
+  TypeName(const TypeName&) = delete;             \
   void operator=(const TypeName&) = delete
-#endif  // !defined(DISALLOW_COPY_AND_ASSIGN)
 
-// A macro to disallow all the implicit constructors, namely the
-// default constructor, copy constructor and operator= functions.
-//
-// This should be used in the private: declarations for a class
-// that wants to prevent anyone from instantiating it. This is
-// especially useful for classes containing only static methods.
-#define DISALLOW_IMPLICIT_CONSTRUCTORS(TypeName) \
-  TypeName() = delete;                           \
-  DISALLOW_COPY_AND_ASSIGN(TypeName)
+#define BIONIC_DISALLOW_IMPLICIT_CONSTRUCTORS(TypeName) \
+  TypeName() = delete;                                  \
+  BIONIC_DISALLOW_COPY_AND_ASSIGN(TypeName)
 
 #define BIONIC_ROUND_UP_POWER_OF_2(value) \
   ((sizeof(value) == 8) \
@@ -101,5 +87,3 @@
 #else
 #define __BIONIC_FALLTHROUGH
 #endif
-
-#endif // _BIONIC_MACROS_H_
diff --git a/libc/private/bionic_systrace.h b/libc/private/bionic_systrace.h
index 304fb80..86d2a08 100644
--- a/libc/private/bionic_systrace.h
+++ b/libc/private/bionic_systrace.h
@@ -14,8 +14,7 @@
  * limitations under the License.
  */
 
-#ifndef BIONIC_SYSTRACE_H
-#define BIONIC_SYSTRACE_H
+#pragma once
 
 #include "bionic_macros.h"
 
@@ -31,10 +30,8 @@
   void End();
  private:
   bool called_end_;
-  DISALLOW_COPY_AND_ASSIGN(ScopedTrace);
+  BIONIC_DISALLOW_COPY_AND_ASSIGN(ScopedTrace);
 };
 
 void bionic_trace_begin(const char* message);
 void bionic_trace_end();
-
-#endif
diff --git a/libc/system_properties/include/system_properties/context_node.h b/libc/system_properties/include/system_properties/context_node.h
index 35d0e92..20f4013 100644
--- a/libc/system_properties/include/system_properties/context_node.h
+++ b/libc/system_properties/include/system_properties/context_node.h
@@ -42,7 +42,7 @@
     Unmap();
   }
 
-  DISALLOW_COPY_AND_ASSIGN(ContextNode);
+  BIONIC_DISALLOW_COPY_AND_ASSIGN(ContextNode);
 
   bool Open(bool access_rw, bool* fsetxattr_failed);
   bool CheckAccessAndOpen();
diff --git a/libc/system_properties/include/system_properties/prop_area.h b/libc/system_properties/include/system_properties/prop_area.h
index 2c25337..a69f90e 100644
--- a/libc/system_properties/include/system_properties/prop_area.h
+++ b/libc/system_properties/include/system_properties/prop_area.h
@@ -86,7 +86,7 @@
   }
 
  private:
-  DISALLOW_COPY_AND_ASSIGN(prop_bt);
+  BIONIC_DISALLOW_COPY_AND_ASSIGN(prop_bt);
 };
 
 class prop_area {
@@ -158,5 +158,5 @@
   uint32_t reserved_[28];
   char data_[0];
 
-  DISALLOW_COPY_AND_ASSIGN(prop_area);
+  BIONIC_DISALLOW_COPY_AND_ASSIGN(prop_area);
 };
diff --git a/libc/system_properties/include/system_properties/prop_info.h b/libc/system_properties/include/system_properties/prop_info.h
index a127550..27b29c8 100644
--- a/libc/system_properties/include/system_properties/prop_info.h
+++ b/libc/system_properties/include/system_properties/prop_info.h
@@ -83,7 +83,7 @@
   prop_info(const char* name, uint32_t namelen, uint32_t long_offset);
 
  private:
-  DISALLOW_IMPLICIT_CONSTRUCTORS(prop_info);
+  BIONIC_DISALLOW_IMPLICIT_CONSTRUCTORS(prop_info);
 };
 
 static_assert(sizeof(prop_info) == 96, "sizeof struct prop_info must be 96 bytes");
diff --git a/libc/system_properties/include/system_properties/system_properties.h b/libc/system_properties/include/system_properties/system_properties.h
index 52ffcaf..cad29cc 100644
--- a/libc/system_properties/include/system_properties/system_properties.h
+++ b/libc/system_properties/include/system_properties/system_properties.h
@@ -52,7 +52,7 @@
   explicit SystemProperties(bool initialized) : initialized_(initialized) {
   }
 
-  DISALLOW_COPY_AND_ASSIGN(SystemProperties);
+  BIONIC_DISALLOW_COPY_AND_ASSIGN(SystemProperties);
 
   bool Init(const char* filename);
   bool AreaInit(const char* filename, bool* fsetxattr_failed);