Update the tcmalloc chromium branch to r144 (gperftools 2.0), and merge chromium-specific changes.

third_party/tcmalloc/chromium/src/base/dynamic_annotations.h

 /* Copyright (c) 2008, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 360 matching lines @@
 #endif  /* DYNAMIC_ANNOTATIONS_ENABLED */
 
 /* Macro definitions for GCC attributes that allow static thread safety
    analysis to recognize and use some of the dynamic annotations as
    escape hatches.
    TODO(lcwu): remove the check for __SUPPORT_DYN_ANNOTATION__ once the
    default crosstool/GCC supports these GCC attributes.  */
 
 #define ANNOTALYSIS_STATIC_INLINE
 #define ANNOTALYSIS_SEMICOLON_OR_EMPTY_BODY ;
+#define ANNOTALYSIS_IGNORE_READS_BEGIN
+#define ANNOTALYSIS_IGNORE_READS_END
+#define ANNOTALYSIS_IGNORE_WRITES_BEGIN
+#define ANNOTALYSIS_IGNORE_WRITES_END
+#define ANNOTALYSIS_UNPROTECTED_READ
 
-#if defined(__GNUC__) && defined(__SUPPORT_TS_ANNOTATION__) \
-  && (!defined(SWIG)) && defined(__SUPPORT_DYN_ANNOTATION__)
+#if defined(__GNUC__) && (!defined(SWIG)) && (!defined(__clang__)) && \
+    defined(__SUPPORT_TS_ANNOTATION__) && defined(__SUPPORT_DYN_ANNOTATION__)
 
 #if DYNAMIC_ANNOTATIONS_ENABLED == 0
 #define ANNOTALYSIS_ONLY 1
 #undef ANNOTALYSIS_STATIC_INLINE
 #define ANNOTALYSIS_STATIC_INLINE static inline
 #undef ANNOTALYSIS_SEMICOLON_OR_EMPTY_BODY
 #define ANNOTALYSIS_SEMICOLON_OR_EMPTY_BODY { (void)file; (void)line; }
 #endif
-#define ANNOTALYSIS_IGNORE_READS_BEGIN   __attribute__ ((ignore_reads_begin))
-#define ANNOTALYSIS_IGNORE_READS_END     __attribute__ ((ignore_reads_end))
-#define ANNOTALYSIS_IGNORE_WRITES_BEGIN  __attribute__ ((ignore_writes_begin))
-#define ANNOTALYSIS_IGNORE_WRITES_END    __attribute__ ((ignore_writes_end))
-#define ANNOTALYSIS_UNPROTECTED_READ     __attribute__ ((unprotected_read))
 
-#else
+/* Only emit attributes when annotalysis is enabled. */
+#if defined(__SUPPORT_TS_ANNOTATION__) && defined(__SUPPORT_DYN_ANNOTATION__)
+#undef  ANNOTALYSIS_IGNORE_READS_BEGIN
+#define ANNOTALYSIS_IGNORE_READS_BEGIN  __attribute__ ((ignore_reads_begin))
+#undef  ANNOTALYSIS_IGNORE_READS_END
+#define ANNOTALYSIS_IGNORE_READS_END    __attribute__ ((ignore_reads_end))
+#undef  ANNOTALYSIS_IGNORE_WRITES_BEGIN
+#define ANNOTALYSIS_IGNORE_WRITES_BEGIN __attribute__ ((ignore_writes_begin))
+#undef  ANNOTALYSIS_IGNORE_WRITES_END
+#define ANNOTALYSIS_IGNORE_WRITES_END   __attribute__ ((ignore_writes_end))
+#undef  ANNOTALYSIS_UNPROTECTED_READ
+#define ANNOTALYSIS_UNPROTECTED_READ    __attribute__ ((unprotected_read))
+#endif
 
-#define ANNOTALYSIS_IGNORE_READS_BEGIN
-#define ANNOTALYSIS_IGNORE_READS_END
-#define ANNOTALYSIS_IGNORE_WRITES_BEGIN
-#define ANNOTALYSIS_IGNORE_WRITES_END
-#define ANNOTALYSIS_UNPROTECTED_READ
-
-#endif
+#endif // defined(__GNUC__) && (!defined(SWIG)) && (!defined(__clang__))
 
 /* Use the macros above rather than using these functions directly. */
 #ifdef __cplusplus
 extern "C" {
 #endif
 void AnnotateRWLockCreate(const char *file, int line,
                           const volatile void *lock);
 void AnnotateRWLockDestroy(const char *file, int line,
                            const volatile void *lock);
 void AnnotateRWLockAcquired(const char *file, int line,
@@ skipping 180 matching lines @@
   #define ANNOTATE_IGNORE_READS_AND_WRITES_END()  \
     do {                                          \
       ANNOTATE_IGNORE_WRITES_END();               \
       ANNOTATE_IGNORE_READS_END();                \
     }while(0)                                     \
 
   #if defined(__cplusplus)
     #undef ANNOTATE_UNPROTECTED_READ
     template <class T>
     inline T ANNOTATE_UNPROTECTED_READ(const volatile T &x)
-        __attribute__ ((unprotected_read)) {
+         ANNOTALYSIS_UNPROTECTED_READ {
       ANNOTATE_IGNORE_READS_BEGIN();
       T res = x;
       ANNOTATE_IGNORE_READS_END();
       return res;
     }
   #endif /* __cplusplus */
 
 #endif /* ANNOTALYSIS_ONLY */
 
 /* Undefine the macros intended only in this file. */
 #undef ANNOTALYSIS_STATIC_INLINE
 #undef ANNOTALYSIS_SEMICOLON_OR_EMPTY_BODY
 
 #endif  /* BASE_DYNAMIC_ANNOTATIONS_H_ */