libcxx/lib/abi/CHANGELOG.TXT

   1 ABI Changelog
   2 ==============
   3 This changelog contains information about ABI changes in libc++. Specifically
   4 the addition and deletion of symbols from the libc++ dylib.
   5
   6 Each entry should start with the revision number followed by a description of
   7 the change. The entry should contain a summary of the ABI changes made,
   8 including what symbols were added, removed, or changed.
   9
  10 To generate a summary, re-generate the new ABI list using the
  11 `generate-cxx-abilist` target, and look at the diff.
  12
  13 New entries should be added directly below the "Version" header.
  14
  15 ------------
  16 Version 18.0
  17 ------------
  18
  19 * [libc++] Simplify the implementation of locale::id
  20
  21   This patch removes a symbol defined in the library for std::locale::id::__init().
  22   The symbol '__init' was defined as a private static function as part of the locale::id
  23   class and was never visible from outside the dylib. The addition of this symbol to the
  24   ABI was most likely accidental. The deletion of the symbol should not be a breaking change.
  25
  26   All platforms
  27   -------------
  28   Symbol removed: _ZNSt3__16locale2id6__initEv
  29
  30 * [libc++] Remove symbol for std::system_error from the dylib
  31
  32   This patch removes a symbol defined in the library for std::system_error.
  33   The symbol '__init' was defined as a private static function as part of the
  34   system_error class and was never visible. The addition of this symbol to the ABI was most likely accidental.
  35   The function '__init' is replaced by another equivalent function which is placed in the
  36   anonymous namespace of the std::system_error source code file.
  37   There are no internal references to this symbol which seems to support the reasoning that
  38   this was never used outside of the dylib.
  39   The deletion of the symbol should not be a breaking change.
  40
  41   All platforms
  42   -------------
  43   Symbol removed: _ZNSt3__112system_error6__initERKNS_10error_codeENS_12basic_stringIcNS_11char_traitsIcEENS_9allocatorIcEEEE
  44
  45 ------------
  46 Version 17.0
  47 ------------
  48
  49 * [libc++] Remove symbols for a std::allocator_arg & friends from the dylib
  50
  51   This patch removes the symbols defined in the library for std::allocator_arg,
  52   std::defer_lock, std::try_to_lock, std::adopt_lock, and std::piecewise_construct.
  53   Those were defined in the library because we provided them in C++03 as an
  54   extension, and in C++03 it was impossible to define them as `constexpr`
  55   variables, as required by the Standard.
  56
  57   This is technically an ABI break since we are removing symbols from the
  58   library. However, in practice, only programs compiled in C++03 mode that
  59   take the address of those objects (or pass them as a reference) will have
  60   an undefined ref to those symbols. In practice, this is expected to be
  61   rare. First, those are C++11 features that we happen to provide in C++03,
  62   and only the C++03 definition can potentially lead to code referencing
  63   the dylib definition. So any code that is using these objects but compiling
  64   in C++11 mode (as they should) is not at risk. Second, all uses of these
  65   types in the library is done by passing those types by value to a function
  66   that can get inlined. Since they are empty types, the compiler won't
  67   generate an undefined reference if passed by value, since there's nothing
  68   to pass anyway.
  69
  70   Long story short, the risk for code actually containing an undefined
  71   reference to one of these types is rather small (but non-zero).
  72
  73   All platforms
  74   -------------
  75   Symbol removed: _ZNSt3__110adopt_lockE
  76   Symbol removed: _ZNSt3__110defer_lockE
  77   Symbol removed: _ZNSt3__111try_to_lockE
  78   Symbol removed: _ZNSt3__113allocator_argE
  79   Symbol removed: _ZNSt3__119piecewise_constructE
  80
  81 * [libc++] Remove explicit instantiations of __insertion_sort_incomplete and __sort5 from the dylib
  82
  83   These instantiations were never visible, because they are only used in `__sort`, which is also explicitly
  84   instantiated in the dylib.
  85
  86   All platforms
  87   -------------
  88   Symbol removed: _ZNSt3__127__insertion_sort_incompleteIRNS_6__lessIaaEEPaEEbT0_S5_T_
  89   Symbol removed: _ZNSt3__127__insertion_sort_incompleteIRNS_6__lessIccEEPcEEbT0_S5_T_
  90   Symbol removed: _ZNSt3__127__insertion_sort_incompleteIRNS_6__lessIddEEPdEEbT0_S5_T_
  91   Symbol removed: _ZNSt3__127__insertion_sort_incompleteIRNS_6__lessIeeEEPeEEbT0_S5_T_
  92   Symbol removed: _ZNSt3__127__insertion_sort_incompleteIRNS_6__lessIffEEPfEEbT0_S5_T_
  93   Symbol removed: _ZNSt3__127__insertion_sort_incompleteIRNS_6__lessIhhEEPhEEbT0_S5_T_
  94   Symbol removed: _ZNSt3__127__insertion_sort_incompleteIRNS_6__lessIiiEEPiEEbT0_S5_T_
  95   Symbol removed: _ZNSt3__127__insertion_sort_incompleteIRNS_6__lessIjjEEPjEEbT0_S5_T_
  96   Symbol removed: _ZNSt3__127__insertion_sort_incompleteIRNS_6__lessIllEEPlEEbT0_S5_T_
  97   Symbol removed: _ZNSt3__127__insertion_sort_incompleteIRNS_6__lessImmEEPmEEbT0_S5_T_
  98   Symbol removed: _ZNSt3__127__insertion_sort_incompleteIRNS_6__lessIssEEPsEEbT0_S5_T_
  99   Symbol removed: _ZNSt3__127__insertion_sort_incompleteIRNS_6__lessIttEEPtEEbT0_S5_T_
 100   Symbol removed: _ZNSt3__127__insertion_sort_incompleteIRNS_6__lessIwwEEPwEEbT0_S5_T_
 101   Symbol removed: _ZNSt3__127__insertion_sort_incompleteIRNS_6__lessIxxEEPxEEbT0_S5_T_
 102   Symbol removed: _ZNSt3__127__insertion_sort_incompleteIRNS_6__lessIyyEEPyEEbT0_S5_T_
 103   Symbol removed: _ZNSt3__17__sort5IRNS_6__lessIeeEEPeEEjT0_S5_S5_S5_S5_T_
 104
 105 ------------
 106 Version 16.0
 107 ------------
 108
 109 * [libc++][PMR] Move the pmr::memory_resource destructor into the dylib
 110
 111   All platforms
 112   -------------
 113   Symbol added: _ZNSt3__13pmr15memory_resourceD0Ev
 114   Symbol added: _ZNSt3__13pmr15memory_resourceD1Ev
 115   Symbol added: _ZNSt3__13pmr15memory_resourceD2Ev
 116   Symbol added: _ZTVNSt3__13pmr15memory_resourceE
 117
 118 * [libc++] [C++17] Implement <memory_resource>.
 119
 120   This commit adds <memory_resource> to the shared library.
 121
 122   All platforms
 123   -------------
 124   Symbol added: _ZNKSt3__13pmr26synchronized_pool_resource11do_is_equalERKNS0_15memory_resourceE
 125   Symbol added: _ZNKSt3__13pmr28unsynchronized_pool_resource12__pool_indexEmm
 126   Symbol added: _ZNKSt3__13pmr28unsynchronized_pool_resource17__pool_block_sizeEi
 127   Symbol added: _ZNKSt3__13pmr28unsynchronized_pool_resource22__log2_pool_block_sizeEi
 128   Symbol added: _ZNKSt3__13pmr28unsynchronized_pool_resource7optionsEv
 129   Symbol added: _ZNSt3__13pmr19new_delete_resourceEv
 130   Symbol added: _ZNSt3__13pmr20get_default_resourceEv
 131   Symbol added: _ZNSt3__13pmr20null_memory_resourceEv
 132   Symbol added: _ZNSt3__13pmr20set_default_resourceEPNS0_15memory_resourceE
 133   Symbol added: _ZNSt3__13pmr25monotonic_buffer_resource11do_allocateEmm
 134   Symbol added: _ZNSt3__13pmr25monotonic_buffer_resource14__chunk_footer25__try_allocate_from_chunkEmm
 135   Symbol added: _ZNSt3__13pmr25monotonic_buffer_resource20__initial_descriptor25__try_allocate_from_chunkEmm
 136   Symbol added: _ZNSt3__13pmr28unsynchronized_pool_resource11do_allocateEmm
 137   Symbol added: _ZNSt3__13pmr28unsynchronized_pool_resource12__adhoc_pool13__do_allocateEPNS0_15memory_resourceEmm
 138   Symbol added: _ZNSt3__13pmr28unsynchronized_pool_resource12__adhoc_pool13__release_ptrEPNS0_15memory_resourceE
 139   Symbol added: _ZNSt3__13pmr28unsynchronized_pool_resource12__adhoc_pool15__do_deallocateEPNS0_15memory_resourceEPvmm
 140   Symbol added: _ZNSt3__13pmr28unsynchronized_pool_resource13do_deallocateEPvmm
 141   Symbol added: _ZNSt3__13pmr28unsynchronized_pool_resource7releaseEv
 142   Symbol added: _ZNSt3__13pmr28unsynchronized_pool_resourceC1ERKNS0_12pool_optionsEPNS0_15memory_resourceE
 143   Symbol added: _ZNSt3__13pmr28unsynchronized_pool_resourceC2ERKNS0_12pool_optionsEPNS0_15memory_resourceE
 144   Symbol added: _ZTINSt3__13pmr15memory_resourceE
 145   Symbol added: _ZTINSt3__13pmr25monotonic_buffer_resourceE
 146   Symbol added: _ZTINSt3__13pmr26__null_memory_resource_impE
 147   Symbol added: _ZTINSt3__13pmr26synchronized_pool_resourceE
 148   Symbol added: _ZTINSt3__13pmr28unsynchronized_pool_resourceE
 149   Symbol added: _ZTINSt3__13pmr32__new_delete_memory_resource_impE
 150   Symbol added: _ZTSNSt3__13pmr15memory_resourceE
 151   Symbol added: _ZTSNSt3__13pmr25monotonic_buffer_resourceE
 152   Symbol added: _ZTSNSt3__13pmr26__null_memory_resource_impE
 153   Symbol added: _ZTSNSt3__13pmr26synchronized_pool_resourceE
 154   Symbol added: _ZTSNSt3__13pmr28unsynchronized_pool_resourceE
 155   Symbol added: _ZTSNSt3__13pmr32__new_delete_memory_resource_impE
 156   Symbol added: _ZTVNSt3__13pmr25monotonic_buffer_resourceE
 157   Symbol added: _ZTVNSt3__13pmr26synchronized_pool_resourceE
 158   Symbol added: _ZTVNSt3__13pmr28unsynchronized_pool_resourceE
 159
 160 ------------
 161 Version 15.0
 162 ------------
 163
 164 * f1c30135417f - [libc++] Drop the legacy debug mode symbols by default
 165
 166   This commit removed symbols implementing debug mode in the non-debug
 167   configuration of the library. Using the debug mode now requires a
 168   differently-configured version of libc++. This is technically an ABI
 169   break, however any user having been using the debug mode support previously
 170   was already at risk of non-benign ODR violations, and in practice we
 171   never found it to work reliably.
 172
 173   All platforms
 174   -------------
 175   Symbol removed: _ZNKSt3__111__libcpp_db15__decrementableEPKv
 176   Symbol removed: _ZNKSt3__111__libcpp_db15__find_c_from_iEPv
 177   Symbol removed: _ZNKSt3__111__libcpp_db15__subscriptableEPKvl
 178   Symbol removed: _ZNKSt3__111__libcpp_db17__dereferenceableEPKv
 179   Symbol removed: _ZNKSt3__111__libcpp_db17__find_c_and_lockEPv
 180   Symbol removed: _ZNKSt3__111__libcpp_db22__less_than_comparableEPKvS2_
 181   Symbol removed: _ZNKSt3__111__libcpp_db6unlockEv
 182   Symbol removed: _ZNKSt3__111__libcpp_db8__find_cEPv
 183   Symbol removed: _ZNKSt3__111__libcpp_db9__addableEPKvl
 184   Symbol removed: _ZNKSt3__119__libcpp_debug_info4whatEv
 185   Symbol removed: _ZNSt3__111__libcpp_db10__insert_cEPvPFPNS_8__c_nodeES1_S1_S3_E
 186   Symbol removed: _ZNSt3__111__libcpp_db10__insert_iEPv
 187   Symbol removed: _ZNSt3__111__libcpp_db11__insert_icEPvPKv
 188   Symbol removed: _ZNSt3__111__libcpp_db15__iterator_copyEPvPKv
 189   Symbol removed: _ZNSt3__111__libcpp_db16__invalidate_allEPv
 190   Symbol removed: _ZNSt3__111__libcpp_db4swapEPvS1_
 191   Symbol removed: _ZNSt3__111__libcpp_db9__erase_cEPv
 192   Symbol removed: _ZNSt3__111__libcpp_db9__erase_iEPv
 193   Symbol removed: _ZNSt3__111__libcpp_dbC1Ev
 194   Symbol removed: _ZNSt3__111__libcpp_dbC2Ev
 195   Symbol removed: _ZNSt3__111__libcpp_dbD1Ev
 196   Symbol removed: _ZNSt3__111__libcpp_dbD2Ev
 197   Symbol removed: _ZNSt3__114__get_const_dbEv
 198   Symbol removed: _ZNSt3__123__libcpp_debug_functionE
 199   Symbol removed: _ZNSt3__127__libcpp_set_debug_functionEPFvRKNS_19__libcpp_debug_infoEE
 200   Symbol removed: _ZNSt3__129__libcpp_abort_debug_functionERKNS_19__libcpp_debug_infoE
 201   Symbol removed: _ZNSt3__18__c_node5__addEPNS_8__i_nodeE
 202   Symbol removed: _ZNSt3__18__c_nodeD0Ev
 203   Symbol removed: _ZNSt3__18__c_nodeD1Ev
 204   Symbol removed: _ZNSt3__18__c_nodeD2Ev
 205   Symbol removed: _ZNSt3__18__get_dbEv
 206   Symbol removed: _ZNSt3__18__i_nodeD1Ev
 207   Symbol removed: _ZNSt3__18__i_nodeD2Ev
 208   Symbol removed: _ZTINSt3__18__c_nodeE
 209   Symbol removed: _ZTSNSt3__18__c_nodeE
 210   Symbol removed: _ZTVNSt3__18__c_nodeE
 211
 212 * b0fd9497af6d, 7de5aca84c54 and 507125af3d0b - [libc++] Add a lightweight overridable assertion handler
 213
 214   This patch adds a lightweight assertion handler mechanism that can be
 215   overriden at link-time in a fashion similar to `operator new`. A default
 216   assertion handler is provided in the shared library, hence the added
 217   symbol.
 218
 219   All platforms
 220   -------------
 221   Symbol added: _ZNSt3__122__libcpp_verbose_abortEPKcz
 222
 223 ------------
 224 Version 14.0
 225 ------------
 226
 227 * abb5dd6e99df - [libc++] `to_chars` for floating point.
 228
 229   This commit added the `to_chars` implementation for floating point values.
 230   The entire implementation resides in the dylib and the functions specified
 231   in the Standard are now part of the ABI.
 232
 233   All platforms
 234   -------------
 235   Symbol added: _ZNSt3__18to_charsEPcS0_d
 236   Symbol added: _ZNSt3__18to_charsEPcS0_dNS_12chars_formatE
 237   Symbol added: _ZNSt3__18to_charsEPcS0_dNS_12chars_formatEi
 238   Symbol added: _ZNSt3__18to_charsEPcS0_e
 239   Symbol added: _ZNSt3__18to_charsEPcS0_eNS_12chars_formatE
 240   Symbol added: _ZNSt3__18to_charsEPcS0_eNS_12chars_formatEi
 241   Symbol added: _ZNSt3__18to_charsEPcS0_f
 242   Symbol added: _ZNSt3__18to_charsEPcS0_fNS_12chars_formatE
 243   Symbol added: _ZNSt3__18to_charsEPcS0_fNS_12chars_formatEi
 244
 245 * 049f6c29a6f0 - [libc++] Resolve missing table_size symbol
 246
 247   This commit added an out-of-line definition for `table_size` in the library.
 248   This is not an ABI break since we are just adding a symbol to the library.
 249   In fact, any program that would have attempted to refer to that symbol would
 250   have previously failed to link.
 251
 252   <arch>-apple-darwin
 253   -------------------------
 254   Symbol added: _ZNSt3__15ctypeIcE10table_sizeE
 255
 256   x86_64-unknown-linux-gnu
 257   ------------------------
 258   Symbol added: _ZNSt3__15ctypeIcE10table_sizeE
 259
 260 * 434dc0a5bcae - [libc++] Always define a key function for std::bad_function_call in the dylib
 261
 262   This commit added a new explicit instantiation of std::bad_function_call's
 263   vtable in the shared library. This change is not an ABI break as it only
 264   adds symbols to the library. Programs compiled against the library will not
 265   rely on the vtable being defined in it by default. Reliance on the vtable
 266   being in the shared library can be enabled by defining the
 267   _LIBCPP_ABI_BAD_FUNCTION_CALL_KEY_FUNCTION macro.
 268
 269   Note that this commit also causes the libc++ shared library to start relying
 270   on std::exception::what() being provided. This is due to the fact that the
 271   shared library now contains the vtable for std::bad_function_call, which
 272   references std::exception::what(). This shouldn't be an issue since that
 273   function needs to be available to users in order to use std::bad_function_call
 274   before this patch too.
 275
 276   All platforms
 277   -------------
 278   Symbol added: _ZNSt3__117bad_function_callD0Ev
 279   Symbol added: _ZNSt3__117bad_function_callD1Ev
 280   Symbol added: _ZNSt3__117bad_function_callD2Ev
 281   Symbol added: _ZTINSt3__117bad_function_callE
 282   Symbol added: _ZTSNSt3__117bad_function_callE
 283   Symbol added: _ZTVNSt3__117bad_function_callE
 284
 285   <arch>-unknown-linux-gnu
 286   ------------------------
 287   Added dependency on symbol: _ZNKSt9exception4whatEv
 288
 289 ------------
 290 Version 12.0
 291 ------------
 292
 293 * a984dcaf7c21 - [libc++] [P0482] [C++20] Implement missing bits for codecvt and codecvt_byname.
 294
 295   This commit added new instantiations with char8_t for classes codecvt and
 296   codecvt_byname in <locale> in the library.
 297
 298   All platforms
 299   -------------
 300   Symbol added: _ZNKSt3__17codecvtIDiDu11__mbstate_tE10do_unshiftERS1_PDuS4_RS4_
 301   Symbol added: _ZNKSt3__17codecvtIDiDu11__mbstate_tE11do_encodingEv
 302   Symbol added: _ZNKSt3__17codecvtIDiDu11__mbstate_tE13do_max_lengthEv
 303   Symbol added: _ZNKSt3__17codecvtIDiDu11__mbstate_tE16do_always_noconvEv
 304   Symbol added: _ZNKSt3__17codecvtIDiDu11__mbstate_tE5do_inERS1_PKDuS5_RS5_PDiS7_RS7_
 305   Symbol added: _ZNKSt3__17codecvtIDiDu11__mbstate_tE6do_outERS1_PKDiS5_RS5_PDuS7_RS7_
 306   Symbol added: _ZNKSt3__17codecvtIDiDu11__mbstate_tE9do_lengthERS1_PKDuS5_m
 307   Symbol added: _ZNKSt3__17codecvtIDsDu11__mbstate_tE10do_unshiftERS1_PDuS4_RS4_
 308   Symbol added: _ZNKSt3__17codecvtIDsDu11__mbstate_tE11do_encodingEv
 309   Symbol added: _ZNKSt3__17codecvtIDsDu11__mbstate_tE13do_max_lengthEv
 310   Symbol added: _ZNKSt3__17codecvtIDsDu11__mbstate_tE16do_always_noconvEv
 311   Symbol added: _ZNKSt3__17codecvtIDsDu11__mbstate_tE5do_inERS1_PKDuS5_RS5_PDsS7_RS7_
 312   Symbol added: _ZNKSt3__17codecvtIDsDu11__mbstate_tE6do_outERS1_PKDsS5_RS5_PDuS7_RS7_
 313   Symbol added: _ZNKSt3__17codecvtIDsDu11__mbstate_tE9do_lengthERS1_PKDuS5_m
 314   Symbol added: _ZNSt3__114codecvt_bynameIDiDu11__mbstate_tED0Ev
 315   Symbol added: _ZNSt3__114codecvt_bynameIDiDu11__mbstate_tED1Ev
 316   Symbol added: _ZNSt3__114codecvt_bynameIDiDu11__mbstate_tED2Ev
 317   Symbol added: _ZNSt3__114codecvt_bynameIDsDu11__mbstate_tED0Ev
 318   Symbol added: _ZNSt3__114codecvt_bynameIDsDu11__mbstate_tED1Ev
 319   Symbol added: _ZNSt3__114codecvt_bynameIDsDu11__mbstate_tED2Ev
 320   Symbol added: _ZNSt3__17codecvtIDiDu11__mbstate_tE2idE
 321   Symbol added: _ZNSt3__17codecvtIDiDu11__mbstate_tED0Ev
 322   Symbol added: _ZNSt3__17codecvtIDiDu11__mbstate_tED1Ev
 323   Symbol added: _ZNSt3__17codecvtIDiDu11__mbstate_tED2Ev
 324   Symbol added: _ZNSt3__17codecvtIDsDu11__mbstate_tE2idE
 325   Symbol added: _ZNSt3__17codecvtIDsDu11__mbstate_tED0Ev
 326   Symbol added: _ZNSt3__17codecvtIDsDu11__mbstate_tED1Ev
 327   Symbol added: _ZNSt3__17codecvtIDsDu11__mbstate_tED2Ev
 328   Symbol added: _ZTINSt3__114codecvt_bynameIDiDu11__mbstate_tEE
 329   Symbol added: _ZTINSt3__114codecvt_bynameIDsDu11__mbstate_tEE
 330   Symbol added: _ZTINSt3__17codecvtIDiDu11__mbstate_tEE
 331   Symbol added: _ZTINSt3__17codecvtIDsDu11__mbstate_tEE
 332   Symbol added: _ZTSNSt3__17codecvtIDiDu11__mbstate_tEE
 333   Symbol added: _ZTSNSt3__17codecvtIDsDu11__mbstate_tEE
 334   Symbol added: _ZTVNSt3__114codecvt_bynameIDiDu11__mbstate_tEE
 335   Symbol added: _ZTVNSt3__114codecvt_bynameIDsDu11__mbstate_tEE
 336   Symbol added: _ZTVNSt3__17codecvtIDiDu11__mbstate_tEE
 337   Symbol added: _ZTVNSt3__17codecvtIDsDu11__mbstate_tEE
 338
 339   <arch>-unknown-linux-gnu
 340   ------------------------
 341   Symbol added: _ZTSNSt3__114codecvt_bynameIDiDu11__mbstate_tEE
 342   Symbol added: _ZTSNSt3__114codecvt_bynameIDsDu11__mbstate_tEE
 343
 344 * 997d41cdec53 - [libc++] Instantiate additional <iostream> members in the dylib
 345
 346   This commit added new explicit instantiations for classes in <iostream> in
 347   the library. This was done after noticing that many programs that used streams
 348   ended up containing weak definitions of these classes, which has a negative
 349   impact on both code size and load times. This change is not an ABI break,
 350   since we are just adding additional symbols.
 351
 352   All platforms
 353   -------------
 354   Symbol added: _ZNKSt3__115basic_stringbufIcNS_11char_traitsIcEENS_9allocatorIcEEE3strEv
 355   Symbol added: _ZNSt3__113basic_filebufIcNS_11char_traitsIcEEE11__read_modeEv
 356   Symbol added: _ZNSt3__113basic_filebufIcNS_11char_traitsIcEEE12__write_modeEv
 357   Symbol added: _ZNSt3__113basic_filebufIcNS_11char_traitsIcEEE4openEPKcj
 358   Symbol added: _ZNSt3__113basic_filebufIcNS_11char_traitsIcEEE4swapERS3_
 359   Symbol added: _ZNSt3__113basic_filebufIcNS_11char_traitsIcEEE4syncEv
 360   Symbol added: _ZNSt3__113basic_filebufIcNS_11char_traitsIcEEE5closeEv
 361   Symbol added: _ZNSt3__113basic_filebufIcNS_11char_traitsIcEEE5imbueERKNS_6localeE
 362   Symbol added: _ZNSt3__113basic_filebufIcNS_11char_traitsIcEEE6setbufEPcl
 363   Symbol added: _ZNSt3__113basic_filebufIcNS_11char_traitsIcEEE7seekoffExNS_8ios_base7seekdirEj
 364   Symbol added: _ZNSt3__113basic_filebufIcNS_11char_traitsIcEEE7seekposENS_4fposI11__mbstate_tEEj
 365   Symbol added: _ZNSt3__113basic_filebufIcNS_11char_traitsIcEEE8overflowEi
 366   Symbol added: _ZNSt3__113basic_filebufIcNS_11char_traitsIcEEE9pbackfailEi
 367   Symbol added: _ZNSt3__113basic_filebufIcNS_11char_traitsIcEEE9underflowEv
 368   Symbol added: _ZNSt3__113basic_filebufIcNS_11char_traitsIcEEEC1EOS3_
 369   Symbol added: _ZNSt3__113basic_filebufIcNS_11char_traitsIcEEEC1Ev
 370   Symbol added: _ZNSt3__113basic_filebufIcNS_11char_traitsIcEEEC2EOS3_
 371   Symbol added: _ZNSt3__113basic_filebufIcNS_11char_traitsIcEEEC2Ev
 372   Symbol added: _ZNSt3__113basic_filebufIcNS_11char_traitsIcEEED0Ev
 373   Symbol added: _ZNSt3__113basic_filebufIcNS_11char_traitsIcEEED1Ev
 374   Symbol added: _ZNSt3__113basic_filebufIcNS_11char_traitsIcEEED2Ev
 375   Symbol added: _ZNSt3__114basic_ifstreamIcNS_11char_traitsIcEEE4openEPKcj
 376   Symbol added: _ZNSt3__114basic_ifstreamIcNS_11char_traitsIcEEE4openERKNS_12basic_stringIcS2_NS_9allocatorIcEEEEj
 377   Symbol added: _ZNSt3__114basic_ofstreamIcNS_11char_traitsIcEEE4openEPKcj
 378   Symbol added: _ZNSt3__114basic_ofstreamIcNS_11char_traitsIcEEE4openERKNS_12basic_stringIcS2_NS_9allocatorIcEEEEj
 379   Symbol added: _ZNSt3__115basic_stringbufIcNS_11char_traitsIcEENS_9allocatorIcEEE3strERKNS_12basic_stringIcS2_S4_EE
 380   Symbol added: _ZNSt3__115basic_stringbufIcNS_11char_traitsIcEENS_9allocatorIcEEE4swapERS5_
 381   Symbol added: _ZNSt3__115basic_stringbufIcNS_11char_traitsIcEENS_9allocatorIcEEE7seekoffExNS_8ios_base7seekdirEj
 382   Symbol added: _ZNSt3__115basic_stringbufIcNS_11char_traitsIcEENS_9allocatorIcEEE8overflowEi
 383   Symbol added: _ZNSt3__115basic_stringbufIcNS_11char_traitsIcEENS_9allocatorIcEEE9pbackfailEi
 384   Symbol added: _ZNSt3__115basic_stringbufIcNS_11char_traitsIcEENS_9allocatorIcEEE9underflowEv
 385   Symbol added: _ZNSt3__115basic_stringbufIcNS_11char_traitsIcEENS_9allocatorIcEEEC1EOS5_
 386   Symbol added: _ZNSt3__115basic_stringbufIcNS_11char_traitsIcEENS_9allocatorIcEEEC2EOS5_
 387   Symbol added: _ZNSt3__115basic_stringbufIcNS_11char_traitsIcEENS_9allocatorIcEEEaSEOS5_
 388   Symbol added: _ZNSt3__118basic_stringstreamIcNS_11char_traitsIcEENS_9allocatorIcEEEaSEOS5_
 389   Symbol added: _ZNSt3__119basic_istringstreamIcNS_11char_traitsIcEENS_9allocatorIcEEEaSEOS5_
 390   Symbol added: _ZNSt3__119basic_ostringstreamIcNS_11char_traitsIcEENS_9allocatorIcEEEaSEOS5_
 391   Symbol added: _ZTCNSt3__114basic_ifstreamIcNS_11char_traitsIcEEEE0_NS_13basic_istreamIcS2_EE
 392   Symbol added: _ZTCNSt3__114basic_ofstreamIcNS_11char_traitsIcEEEE0_NS_13basic_ostreamIcS2_EE
 393   Symbol added: _ZTCNSt3__118basic_stringstreamIcNS_11char_traitsIcEENS_9allocatorIcEEEE0_NS_13basic_istreamIcS2_EE
 394   Symbol added: _ZTCNSt3__118basic_stringstreamIcNS_11char_traitsIcEENS_9allocatorIcEEEE0_NS_14basic_iostreamIcS2_EE
 395   Symbol added: _ZTCNSt3__118basic_stringstreamIcNS_11char_traitsIcEENS_9allocatorIcEEEE16_NS_13basic_ostreamIcS2_EE
 396   Symbol added: _ZTCNSt3__119basic_istringstreamIcNS_11char_traitsIcEENS_9allocatorIcEEEE0_NS_13basic_istreamIcS2_EE
 397   Symbol added: _ZTCNSt3__119basic_ostringstreamIcNS_11char_traitsIcEENS_9allocatorIcEEEE0_NS_13basic_ostreamIcS2_EE
 398   Symbol added: _ZTINSt3__113basic_filebufIcNS_11char_traitsIcEEEE
 399   Symbol added: _ZTINSt3__114basic_ifstreamIcNS_11char_traitsIcEEEE
 400   Symbol added: _ZTINSt3__114basic_ofstreamIcNS_11char_traitsIcEEEE
 401   Symbol added: _ZTINSt3__115basic_stringbufIcNS_11char_traitsIcEENS_9allocatorIcEEEE
 402   Symbol added: _ZTINSt3__118basic_stringstreamIcNS_11char_traitsIcEENS_9allocatorIcEEEE
 403   Symbol added: _ZTINSt3__119basic_istringstreamIcNS_11char_traitsIcEENS_9allocatorIcEEEE
 404   Symbol added: _ZTINSt3__119basic_ostringstreamIcNS_11char_traitsIcEENS_9allocatorIcEEEE
 405   Symbol added: _ZTSNSt3__113basic_filebufIcNS_11char_traitsIcEEEE
 406   Symbol added: _ZTSNSt3__114basic_ifstreamIcNS_11char_traitsIcEEEE
 407   Symbol added: _ZTSNSt3__114basic_ofstreamIcNS_11char_traitsIcEEEE
 408   Symbol added: _ZTSNSt3__115basic_stringbufIcNS_11char_traitsIcEENS_9allocatorIcEEEE
 409   Symbol added: _ZTSNSt3__118basic_stringstreamIcNS_11char_traitsIcEENS_9allocatorIcEEEE
 410   Symbol added: _ZTSNSt3__119basic_istringstreamIcNS_11char_traitsIcEENS_9allocatorIcEEEE
 411   Symbol added: _ZTSNSt3__119basic_ostringstreamIcNS_11char_traitsIcEENS_9allocatorIcEEEE
 412   Symbol added: _ZTTNSt3__114basic_ifstreamIcNS_11char_traitsIcEEEE
 413   Symbol added: _ZTTNSt3__114basic_ofstreamIcNS_11char_traitsIcEEEE
 414   Symbol added: _ZTTNSt3__118basic_stringstreamIcNS_11char_traitsIcEENS_9allocatorIcEEEE
 415   Symbol added: _ZTTNSt3__119basic_istringstreamIcNS_11char_traitsIcEENS_9allocatorIcEEEE
 416   Symbol added: _ZTTNSt3__119basic_ostringstreamIcNS_11char_traitsIcEENS_9allocatorIcEEEE
 417   Symbol added: _ZTVNSt3__113basic_filebufIcNS_11char_traitsIcEEEE
 418   Symbol added: _ZTVNSt3__114basic_ifstreamIcNS_11char_traitsIcEEEE
 419   Symbol added: _ZTVNSt3__114basic_ofstreamIcNS_11char_traitsIcEEEE
 420   Symbol added: _ZTVNSt3__115basic_stringbufIcNS_11char_traitsIcEENS_9allocatorIcEEEE
 421   Symbol added: _ZTVNSt3__118basic_stringstreamIcNS_11char_traitsIcEENS_9allocatorIcEEEE
 422   Symbol added: _ZTVNSt3__119basic_istringstreamIcNS_11char_traitsIcEENS_9allocatorIcEEEE
 423   Symbol added: _ZTVNSt3__119basic_ostringstreamIcNS_11char_traitsIcEENS_9allocatorIcEEEE
 424
 425 * 9b40ee8eb0c1 - [libc++] Define new/delete in libc++abi only by default
 426
 427   By default, libc++ does not include the definition for new and delete anymore.
 428   Those were previously defined in both libc++ and libc++abi, which was an
 429   ODR violation.
 430
 431   <arch>-apple-darwin
 432   -------------------------
 433   The following symbols are now re-exported from libc++abi instead of exported
 434   by libc++ directly (this should not be an ABI break):
 435
 436   Symbol moved: __ZdaPv
 437   Symbol moved: __ZdaPvm
 438   Symbol moved: __ZdaPvmSt11align_val_t
 439   Symbol moved: __ZdaPvRKSt9nothrow_t
 440   Symbol moved: __ZdaPvSt11align_val_t
 441   Symbol moved: __ZdaPvSt11align_val_tRKSt9nothrow_t
 442   Symbol moved: __ZdlPv
 443   Symbol moved: __ZdlPvm
 444   Symbol moved: __ZdlPvmSt11align_val_t
 445   Symbol moved: __ZdlPvRKSt9nothrow_t
 446   Symbol moved: __ZdlPvSt11align_val_t
 447   Symbol moved: __ZdlPvSt11align_val_tRKSt9nothrow_t
 448   Symbol moved: __Znam
 449   Symbol moved: __ZnamRKSt9nothrow_t
 450   Symbol moved: __ZnamSt11align_val_t
 451   Symbol moved: __ZnamSt11align_val_tRKSt9nothrow_t
 452   Symbol moved: __Znwm
 453   Symbol moved: __ZnwmRKSt9nothrow_t
 454   Symbol moved: __ZnwmSt11align_val_t
 455   Symbol moved: __ZnwmSt11align_val_tRKSt9nothrow_t
 456
 457   <arch>-unknown-linux-gnu
 458   ------------------------
 459   The following symbols were moved to libc++abi, but are NOT being re-exported
 460   by libc++. This constitutes an ABI break if one links against libc++ but
 461   not libc++abi.
 462
 463   Symbol moved: _ZdaPv
 464   Symbol moved: _ZdaPvm
 465   Symbol moved: _ZdaPvmSt11align_val_t
 466   Symbol moved: _ZdaPvRKSt9nothrow_t
 467   Symbol moved: _ZdaPvSt11align_val_t
 468   Symbol moved: _ZdaPvSt11align_val_tRKSt9nothrow_t
 469   Symbol moved: _ZdlPv
 470   Symbol moved: _ZdlPvm
 471   Symbol moved: _ZdlPvmSt11align_val_t
 472   Symbol moved: _ZdlPvRKSt9nothrow_t
 473   Symbol moved: _ZdlPvSt11align_val_t
 474   Symbol moved: _ZdlPvSt11align_val_tRKSt9nothrow_t
 475   Symbol moved: _Znam
 476   Symbol moved: _ZnamRKSt9nothrow_t
 477   Symbol moved: _ZnamSt11align_val_t
 478   Symbol moved: _ZnamSt11align_val_tRKSt9nothrow_t
 479   Symbol moved: _Znwm
 480   Symbol moved: _ZnwmRKSt9nothrow_t
 481   Symbol moved: _ZnwmSt11align_val_t
 482   Symbol moved: _ZnwmSt11align_val_tRKSt9nothrow_t
 483
 484 * 4f13b9992971 - [libc++] Simplify how we re-export symbols from libc++abi
 485
 486   We re-export some symbols that were exported from libc++abi but not from
 487   libc++. Exporting new symbols is not an ABI break.
 488
 489   <arch>-apple-darwin
 490   -------------------
 491   Symbol added: ___cxa_allocate_dependent_exception
 492   Symbol added: ___cxa_free_dependent_exception
 493
 494 ------------
 495 Version 10.0
 496 ------------
 497
 498 * 54fa9ecd3088 - [libc++] Implementation of C++20's P1135R6 for libcxx
 499
 500   libc++ now implements P1135R6 (The C++20 Synchronization Library), which
 501   adds a few symbols to the dylib. This is backwards-compatible since we're
 502   just adding new symbols.
 503
 504   All platforms
 505   -------------
 506   Symbol added: __ZNSt3__120__libcpp_atomic_waitEPVKNS_17__cxx_atomic_implIxNS_22__cxx_atomic_base_implIxEEEEx
 507   Symbol added: __ZNSt3__120__libcpp_atomic_waitEPVKvx
 508   Symbol added: __ZNSt3__123__cxx_atomic_notify_allEPVKNS_17__cxx_atomic_implIxNS_22__cxx_atomic_base_implIxEEEE
 509   Symbol added: __ZNSt3__123__cxx_atomic_notify_allEPVKv
 510   Symbol added: __ZNSt3__123__cxx_atomic_notify_oneEPVKNS_17__cxx_atomic_implIxNS_22__cxx_atomic_base_implIxEEEE
 511   Symbol added: __ZNSt3__123__cxx_atomic_notify_oneEPVKv
 512   Symbol added: __ZNSt3__123__libcpp_atomic_monitorEPVKNS_17__cxx_atomic_implIxNS_22__cxx_atomic_base_implIxEEEE
 513   Symbol added: __ZNSt3__123__libcpp_atomic_monitorEPVKv
 514   Symbol added: __ZNSt3__131__arrive_barrier_algorithm_baseEPNS_24__barrier_algorithm_baseEh
 515   Symbol added: __ZNSt3__132__destroy_barrier_algorithm_baseEPNS_24__barrier_algorithm_baseE
 516   Symbol added: __ZNSt3__134__construct_barrier_algorithm_baseERl
 517
 518 -----------
 519 Version 9.0
 520 -----------
 521
 522 * r358690 - Re-rexport missing symbols from libc++abi
 523
 524   libc++ now re-exports `__cxa_throw_bad_array_new_length` and `__cxa_uncaught_exceptions`,
 525   both of which are provided by libc++abi. This is not an ABI break because
 526   we're just adding symbols. Also, this does mean that libc++ can't be linked
 527   against an older version of libc++abi that doesn't provide those symbols,
 528   however doing so is not supported anyway.
 529
 530   <arch>-apple-darwin
 531   -------------------
 532   Symbol added: ___cxa_throw_bad_array_new_length
 533   Symbol added: ___cxa_uncaught_exceptions
 534
 535 * r356518 - Integrate <filesystem> support into the shared library
 536
 537   This patch introduces support for <filesystem> into the shared library,
 538   instead of requiring users to manually link against a static archive. As
 539   such, new symbols required to implement <filesystem> are exported from
 540   the shared library.
 541
 542   All platforms
 543   -------------
 544   Symbol added: _ZNKSt3__14__fs10filesystem18directory_iterator13__dereferenceEv
 545   Symbol added: _ZNKSt3__14__fs10filesystem28recursive_directory_iterator13__dereferenceEv
 546   Symbol added: _ZNKSt3__14__fs10filesystem28recursive_directory_iterator5depthEv
 547   Symbol added: _ZNKSt3__14__fs10filesystem28recursive_directory_iterator7optionsEv
 548   Symbol added: _ZNKSt3__14__fs10filesystem4path10__filenameEv
 549   Symbol added: _ZNKSt3__14__fs10filesystem4path11__extensionEv
 550   Symbol added: _ZNKSt3__14__fs10filesystem4path11__root_nameEv
 551   Symbol added: _ZNKSt3__14__fs10filesystem4path13__parent_pathEv
 552   Symbol added: _ZNKSt3__14__fs10filesystem4path15__relative_pathEv
 553   Symbol added: _ZNKSt3__14__fs10filesystem4path15__root_path_rawEv
 554   Symbol added: _ZNKSt3__14__fs10filesystem4path16__root_directoryEv
 555   Symbol added: _ZNKSt3__14__fs10filesystem4path16lexically_normalEv
 556   Symbol added: _ZNKSt3__14__fs10filesystem4path18lexically_relativeERKS2_
 557   Symbol added: _ZNKSt3__14__fs10filesystem4path3endEv
 558   Symbol added: _ZNKSt3__14__fs10filesystem4path5beginEv
 559   Symbol added: _ZNKSt3__14__fs10filesystem4path6__stemEv
 560   Symbol added: _ZNKSt3__14__fs10filesystem4path9__compareENS_17basic_string_viewIcNS_11char_traitsIcEEEE
 561   Symbol added: _ZNSt3__14__fs10filesystem10__absoluteERKNS1_4pathEPNS_10error_codeE
 562   Symbol added: _ZNSt3__14__fs10filesystem10hash_valueERKNS1_4pathE
 563   Symbol added: _ZNSt3__14__fs10filesystem11__canonicalERKNS1_4pathEPNS_10error_codeE
 564   Symbol added: _ZNSt3__14__fs10filesystem11__copy_fileERKNS1_4pathES4_NS1_12copy_optionsEPNS_10error_codeE
 565   Symbol added: _ZNSt3__14__fs10filesystem11__file_sizeERKNS1_4pathEPNS_10error_codeE
 566   Symbol added: _ZNSt3__14__fs10filesystem12__equivalentERKNS1_4pathES4_PNS_10error_codeE
 567   Symbol added: _ZNSt3__14__fs10filesystem12__remove_allERKNS1_4pathEPNS_10error_codeE
 568   Symbol added: _ZNSt3__14__fs10filesystem13__fs_is_emptyERKNS1_4pathEPNS_10error_codeE
 569   Symbol added: _ZNSt3__14__fs10filesystem13__permissionsERKNS1_4pathENS1_5permsENS1_12perm_optionsEPNS_10error_codeE
 570   Symbol added: _ZNSt3__14__fs10filesystem13__resize_fileERKNS1_4pathEmPNS_10error_codeE
 571   Symbol added: _ZNSt3__14__fs10filesystem14__copy_symlinkERKNS1_4pathES4_PNS_10error_codeE
 572   Symbol added: _ZNSt3__14__fs10filesystem14__current_pathEPNS_10error_codeE
 573   Symbol added: _ZNSt3__14__fs10filesystem14__current_pathERKNS1_4pathEPNS_10error_codeE
 574   Symbol added: _ZNSt3__14__fs10filesystem14__read_symlinkERKNS1_4pathEPNS_10error_codeE
 575   Symbol added: _ZNSt3__14__fs10filesystem15directory_entry12__do_refreshEv
 576   Symbol added: _ZNSt3__14__fs10filesystem16__create_symlinkERKNS1_4pathES4_PNS_10error_codeE
 577   Symbol added: _ZNSt3__14__fs10filesystem16__symlink_statusERKNS1_4pathEPNS_10error_codeE
 578   Symbol added: _ZNSt3__14__fs10filesystem16_FilesystemClock3nowEv
 579   Symbol added: _ZNSt3__14__fs10filesystem16_FilesystemClock9is_steadyE
 580   Symbol added: _ZNSt3__14__fs10filesystem16filesystem_error13__create_whatEi
 581   Symbol added: _ZNSt3__14__fs10filesystem16filesystem_errorD0Ev
 582   Symbol added: _ZNSt3__14__fs10filesystem16filesystem_errorD1Ev
 583   Symbol added: _ZNSt3__14__fs10filesystem16filesystem_errorD2Ev
 584   Symbol added: _ZNSt3__14__fs10filesystem17__hard_link_countERKNS1_4pathEPNS_10error_codeE
 585   Symbol added: _ZNSt3__14__fs10filesystem17__last_write_timeERKNS1_4pathENS_6chrono10time_pointINS1_16_FilesystemClockENS5_8durationInNS_5ratioILl1ELl1000000000EEEEEEEPNS_10error_codeE
 586   Symbol added: _ZNSt3__14__fs10filesystem17__last_write_timeERKNS1_4pathEPNS_10error_codeE
 587   Symbol added: _ZNSt3__14__fs10filesystem18__create_directoryERKNS1_4pathEPNS_10error_codeE
 588   Symbol added: _ZNSt3__14__fs10filesystem18__create_directoryERKNS1_4pathES4_PNS_10error_codeE
 589   Symbol added: _ZNSt3__14__fs10filesystem18__create_hard_linkERKNS1_4pathES4_PNS_10error_codeE
 590   Symbol added: _ZNSt3__14__fs10filesystem18__weakly_canonicalERKNS1_4pathEPNS_10error_codeE
 591   Symbol added: _ZNSt3__14__fs10filesystem18directory_iterator11__incrementEPNS_10error_codeE
 592   Symbol added: _ZNSt3__14__fs10filesystem18directory_iteratorC1ERKNS1_4pathEPNS_10error_codeENS1_17directory_optionsE
 593   Symbol added: _ZNSt3__14__fs10filesystem18directory_iteratorC2ERKNS1_4pathEPNS_10error_codeENS1_17directory_optionsE
 594   Symbol added: _ZNSt3__14__fs10filesystem20__create_directoriesERKNS1_4pathEPNS_10error_codeE
 595   Symbol added: _ZNSt3__14__fs10filesystem21__temp_directory_pathEPNS_10error_codeE
 596   Symbol added: _ZNSt3__14__fs10filesystem26__create_directory_symlinkERKNS1_4pathES4_PNS_10error_codeE
 597   Symbol added: _ZNSt3__14__fs10filesystem28recursive_directory_iterator11__incrementEPNS_10error_codeE
 598   Symbol added: _ZNSt3__14__fs10filesystem28recursive_directory_iterator15__try_recursionEPNS_10error_codeE
 599   Symbol added: _ZNSt3__14__fs10filesystem28recursive_directory_iterator5__popEPNS_10error_codeE
 600   Symbol added: _ZNSt3__14__fs10filesystem28recursive_directory_iterator9__advanceEPNS_10error_codeE
 601   Symbol added: _ZNSt3__14__fs10filesystem28recursive_directory_iteratorC1ERKNS1_4pathENS1_17directory_optionsEPNS_10error_codeE
 602   Symbol added: _ZNSt3__14__fs10filesystem28recursive_directory_iteratorC2ERKNS1_4pathENS1_17directory_optionsEPNS_10error_codeE
 603   Symbol added: _ZNSt3__14__fs10filesystem4path17replace_extensionERKS2_
 604   Symbol added: _ZNSt3__14__fs10filesystem4path19preferred_separatorE
 605   Symbol added: _ZNSt3__14__fs10filesystem4path8iterator11__decrementEv
 606   Symbol added: _ZNSt3__14__fs10filesystem4path8iterator11__incrementEv
 607   Symbol added: _ZNSt3__14__fs10filesystem6__copyERKNS1_4pathES4_NS1_12copy_optionsEPNS_10error_codeE
 608   Symbol added: _ZNSt3__14__fs10filesystem7__spaceERKNS1_4pathEPNS_10error_codeE
 609   Symbol added: _ZNSt3__14__fs10filesystem8__removeERKNS1_4pathEPNS_10error_codeE
 610   Symbol added: _ZNSt3__14__fs10filesystem8__renameERKNS1_4pathES4_PNS_10error_codeE
 611   Symbol added: _ZNSt3__14__fs10filesystem8__statusERKNS1_4pathEPNS_10error_codeE
 612   Symbol added: _ZTINSt3__14__fs10filesystem16filesystem_errorE
 613   Symbol added: _ZTSNSt3__14__fs10filesystem16filesystem_errorE
 614   Symbol added: _ZTVNSt3__14__fs10filesystem16filesystem_errorE
 615
 616 * r356417 - Remove exception throwing debug mode handler support.
 617
 618   The reason libc++ implemented a throwing debug mode handler was for ease of testing. Specifically,
 619   I thought that if a debug violation aborted, we could only test one violation per file. This made
 620   it impossible to test debug mode. Which throwing behavior we could test more!
 621
 622   However, the throwing approach didn't work either, since there are debug violations underneath noexcept
 623   functions. This lead to the introduction of `_NOEXCEPT_DEBUG`, which was only noexcept when debug
 624   mode was off.
 625
 626   Having thought more and having grown wiser, `_NOEXCEPT_DEBUG` was a horrible decision. It was
 627   viral, it didn't cover all the cases it needed to, and it was observable to the user -- at worst
 628   changing the behavior of their program.
 629
 630   This patch removes the throwing debug handler, and rewrites the debug tests using 'fork-ing' style
 631   death tests.
 632
 633   All Platforms (ignoring versioning namespaces)
 634   ----------------------------------------------
 635   Symbol added: _ZNKSt3__119__libcpp_debug_info4whatEv
 636   Symbol removed: _ZNKSt3__124__libcpp_debug_exception4whatEv
 637   Symbol removed: _ZNSt3__124__libcpp_debug_exceptionC1ERKNS_19__libcpp_debug_infoE
 638   Symbol removed: _ZNSt3__124__libcpp_debug_exceptionC1ERKS0_
 639   Symbol removed: _ZNSt3__124__libcpp_debug_exceptionC1Ev
 640   Symbol removed: _ZNSt3__124__libcpp_debug_exceptionC2ERKNS_19__libcpp_debug_infoE
 641   Symbol removed: _ZNSt3__124__libcpp_debug_exceptionC2ERKS0_
 642   Symbol removed: _ZNSt3__124__libcpp_debug_exceptionC2Ev
 643   Symbol removed: _ZNSt3__124__libcpp_debug_exceptionD0Ev
 644   Symbol removed: _ZNSt3__124__libcpp_debug_exceptionD1Ev
 645   Symbol removed: _ZNSt3__124__libcpp_debug_exceptionD2Ev
 646   Symbol removed: _ZNSt3__129__libcpp_throw_debug_functionERKNS_19__libcpp_debug_infoE
 647   Symbol removed: _ZTINSt3__124__libcpp_debug_exceptionE
 648   Symbol removed: _ZTSNSt3__124__libcpp_debug_exceptionE
 649   Symbol removed: _ZTVNSt3__124__libcpp_debug_exceptionE
 650
 651   <arch>-apple-darwin
 652   -------------------
 653   Symbol added: __ZNSt3__111__libcpp_db10__insert_cEPvPFPNS_8__c_nodeES1_S1_S3_E
 654   Symbol removed: __ZNSt3__111__libcpp_db10__insert_cEPv
 655
 656 * r355367 - Fix -fsanitize=vptr badness in <__debug>
 657
 658   This patch fixes a lifetime bug when inserting a new container into the debug database. It is
 659   diagnosed by UBSAN when debug mode is enabled. This patch corrects how nodes are constructed
 660   during insertion.
 661
 662   The fix requires unconditionally breaking the debug mode ABI. Users should not expect ABI
 663   stability from debug mode.
 664
 665   All platforms
 666   -------------
 667   Symbol added: _ZNSt3__111__libcpp_db10__insert_cEPvPFPNS_8__c_nodeES1_S1_S3_E
 668   Symbol removed: _ZNSt3__111__libcpp_db10__insert_cEPv
 669
 670 -----------
 671 Version 8.0
 672 -----------
 673
 674 * r347903 - Remove std::bad_array_length
 675
 676   The change removes the definition of std::bad_array_length (which never made
 677   it into the standard) from the headers and the dylib. This is technically an
 678   ABI break because the symbols are shipped starting with mac OSX 10.13, however
 679   users couldn't be relying on the functionality because it is marked as being
 680   unavailable using Clang's availability attribute.
 681
 682   <arch>-apple-darwin
 683   -------------------
 684   Symbol removed: __ZNKSt16bad_array_length4whatEv
 685   Symbol removed: __ZNKSt16bad_array_length4whatEv
 686   Symbol removed: __ZNSt16bad_array_lengthC1Ev
 687   Symbol removed: __ZNSt16bad_array_lengthC1Ev
 688   Symbol removed: __ZNSt16bad_array_lengthC2Ev
 689   Symbol removed: __ZNSt16bad_array_lengthC2Ev
 690   Symbol removed: __ZNSt16bad_array_lengthD0Ev
 691   Symbol removed: __ZNSt16bad_array_lengthD0Ev
 692   Symbol removed: __ZNSt16bad_array_lengthD1Ev
 693   Symbol removed: __ZNSt16bad_array_lengthD1Ev
 694   Symbol removed: __ZNSt16bad_array_lengthD2Ev
 695   Symbol removed: __ZNSt16bad_array_lengthD2Ev
 696   Symbol removed: __ZTISt16bad_array_length
 697   Symbol removed: __ZTISt16bad_array_length
 698   Symbol removed: __ZTSSt16bad_array_length
 699   Symbol removed: __ZTSSt16bad_array_length
 700   Symbol removed: __ZTVSt16bad_array_length
 701   Symbol removed: __ZTVSt16bad_array_length
 702
 703 * r347395 - Making libc++ build under -fvisibility=hidden on Linux
 704
 705   The change marks several function templates as hidden. This removes symbols
 706   from the shared library, but this is not an ABI break because it's impossible
 707   for programs linking against libc++.so to actually depend on that symbol.
 708   The reason is that the symbol is exported from the shared library through
 709   an implicit instantiation present in the shared object itself only. Furthermore,
 710   if a user's shared object was implicitly instantiating one of these functions,
 711   marking that symbol as hidden would not be an ABI break for them because none
 712   of their users could actually be using the symbol in their dylib (because
 713   it's an implicit instantiation).
 714
 715   x86_64-linux-gnu
 716   ----------------
 717   Symbol removed: _ZNSt3__125__num_get_signed_integralIlEET_PKcS3_Rji
 718   Symbol removed: _ZNSt3__125__num_get_signed_integralIxEET_PKcS3_Rji
 719   Symbol removed: _ZNSt3__127__num_get_unsigned_integralIjEET_PKcS3_Rji
 720   Symbol removed: _ZNSt3__127__num_get_unsigned_integralImEET_PKcS3_Rji
 721   Symbol removed: _ZNSt3__127__num_get_unsigned_integralItEET_PKcS3_Rji
 722   Symbol removed: _ZNSt3__127__num_get_unsigned_integralIyEET_PKcS3_Rji
 723   Symbol removed: _ZNSt3__17__sort5IRNS_6__lessIaaEEPaEEjT0_S5_S5_S5_S5_T_
 724   Symbol removed: _ZNSt3__17__sort5IRNS_6__lessIccEEPcEEjT0_S5_S5_S5_S5_T_
 725   Symbol removed: _ZNSt3__17__sort5IRNS_6__lessIddEEPdEEjT0_S5_S5_S5_S5_T_
 726   Symbol removed: _ZNSt3__17__sort5IRNS_6__lessIffEEPfEEjT0_S5_S5_S5_S5_T_
 727   Symbol removed: _ZNSt3__17__sort5IRNS_6__lessIhhEEPhEEjT0_S5_S5_S5_S5_T_
 728   Symbol removed: _ZNSt3__17__sort5IRNS_6__lessIiiEEPiEEjT0_S5_S5_S5_S5_T_
 729   Symbol removed: _ZNSt3__17__sort5IRNS_6__lessIjjEEPjEEjT0_S5_S5_S5_S5_T_
 730   Symbol removed: _ZNSt3__17__sort5IRNS_6__lessIllEEPlEEjT0_S5_S5_S5_S5_T_
 731   Symbol removed: _ZNSt3__17__sort5IRNS_6__lessImmEEPmEEjT0_S5_S5_S5_S5_T_
 732   Symbol removed: _ZNSt3__17__sort5IRNS_6__lessIssEEPsEEjT0_S5_S5_S5_S5_T_
 733   Symbol removed: _ZNSt3__17__sort5IRNS_6__lessIttEEPtEEjT0_S5_S5_S5_S5_T_
 734   Symbol removed: _ZNSt3__17__sort5IRNS_6__lessIwwEEPwEEjT0_S5_S5_S5_S5_T_
 735   Symbol removed: _ZNSt3__17__sort5IRNS_6__lessIxxEEPxEEjT0_S5_S5_S5_S5_T_
 736   Symbol removed: _ZNSt3__17__sort5IRNS_6__lessIyyEEPyEEjT0_S5_S5_S5_S5_T_
 737   Symbol removed: _ZNSt3__1plIcNS_11char_traitsIcEENS_9allocatorIcEEEENS_12basic_stringIT_T0_T1_EERKS9_PKS6_
 738   Symbol removed: _ZSt18make_exception_ptrINSt3__112future_errorEESt13exception_ptrT_
 739
 740 * r345260 - Making libc++ build under -fvisibility=hidden on Mac OS
 741
 742   The change marks __thread_specific_ptr<__thread_struct>::__at_thread_exit(void*)
 743   with hidden visibility. This removes a symbol from the shared libraries,
 744   however this is not an ABI break because it's impossible for programs linking
 745   against libc++.dylib to actually depend on that symbol. The reason is that
 746   the symbol is exported from the shared library through an implicit
 747   instantiation present in the dylib itself only. Furthermore, if a user's
 748   dylib was implicitly instantiating __thread_specific_ptr<T>::__at_thread_exit
 749   (because it's defined in the headers), marking that symbol as hidden would
 750   not be an ABI break for them because none of their users could actually be
 751   using the symbol in their dylib (because it's an implicit instantiation).
 752
 753   This change also marks __start_std_streams as hidden -- this variable is
 754   only required to initialize the streams, and nobody should depend on it
 755   from outside the dylib.
 756
 757   x86_64-linux-gnu
 758   ----------------
 759   Symbol removed: _ZNSt3__121__thread_specific_ptrINS_15__thread_structEE16__at_thread_exitEPv
 760   Symbol removed: _ZNSt3__119__start_std_streamsE
 761
 762   <arch>-apple-darwin
 763   -------------------
 764   Symbol removed: __ZNSt3__221__thread_specific_ptrINS_15__thread_structEE16__at_thread_exitEPv
 765   Symbol removed: __ZNSt3__119__start_std_streamsE
 766
 767 -----------
 768 Version 7.0
 769 -----------
 770
 771 * r338479 - Elementary string conversions for integral types
 772
 773   The change emits __u64toa and __u32toa under std::__1::__itoa.
 774
 775   x86_64-linux-gnu
 776   ----------------
 777   Symbol added: _ZNSt3__16__itoa8__u64toaEmPc
 778   Symbol added: _ZNSt3__16__itoa8__u32toaEjPc
 779
 780   <arch>-apple-darwin
 781   -------------------
 782   Symbol added: __ZNSt3__16__itoa8__u64toaEyPc
 783   Symbol added: __ZNSt3__16__itoa8__u32toaEjPc
 784
 785
 786 * r333467 - Fix embarrasing typo in uncaught_exceptions.
 787
 788   This bug caused __uncaught_exception to be ODR used instead of
 789   __uncaught_exceptions. This change is non-ABI breaking because the symbols
 790   for std::uncaught_exception and std::uncaught_exceptions haven't changed,
 791   and because users shouldn't be depending directly on libc++ exporting
 792   __uncaught_exception/__uncaught_exceptions.
 793
 794   All Platforms
 795   ----------------
 796   Symbol removed: __cxa_uncaught_exception
 797   Symbol added: __cxa_uncaught_exceptions
 798
 799 -----------
 800 Version 5.0
 801 -----------
 802
 803 * r313500 - Fix undefined "___cxa_deleted_virtual" symbol in macosx
 804
 805   x86_64-linux-gnu
 806   ----------------
 807   No changes
 808
 809   <arch>-apple-darwin
 810   -------------------
 811   Symbol added: ___cxa_deleted_virtual
 812
 813 * r296729 - Remove std::num_get template methods which should be inline
 814
 815   These functions should never have had visible definitions in the dylib but
 816   since they were previously not specified with 'inline' they accidentally
 817   got emitted. This change is non-ABI breaking because every "linkage unit"
 818   must contain its own definition.
 819
 820   x86_64-linux-gnu
 821   ----------------
 822   Symbol removed: _ZNKSt3__17num_getIcNS_19istreambuf_iteratorIcNS_11char_traitsIcEEEEE15__do_get_signedIlEES4_S4_S4_RNS_8ios_baseERjRT_
 823   Symbol removed: _ZNKSt3__17num_getIcNS_19istreambuf_iteratorIcNS_11char_traitsIcEEEEE15__do_get_signedIxEES4_S4_S4_RNS_8ios_baseERjRT_
 824   Symbol removed: _ZNKSt3__17num_getIcNS_19istreambuf_iteratorIcNS_11char_traitsIcEEEEE17__do_get_unsignedIjEES4_S4_S4_RNS_8ios_baseERjRT_
 825   Symbol removed: _ZNKSt3__17num_getIcNS_19istreambuf_iteratorIcNS_11char_traitsIcEEEEE17__do_get_unsignedImEES4_S4_S4_RNS_8ios_baseERjRT_
 826   Symbol removed: _ZNKSt3__17num_getIcNS_19istreambuf_iteratorIcNS_11char_traitsIcEEEEE17__do_get_unsignedItEES4_S4_S4_RNS_8ios_baseERjRT_
 827   Symbol removed: _ZNKSt3__17num_getIcNS_19istreambuf_iteratorIcNS_11char_traitsIcEEEEE17__do_get_unsignedIyEES4_S4_S4_RNS_8ios_baseERjRT_
 828   Symbol removed: _ZNKSt3__17num_getIcNS_19istreambuf_iteratorIcNS_11char_traitsIcEEEEE23__do_get_floating_pointIdEES4_S4_S4_RNS_8ios_baseERjRT_
 829   Symbol removed: _ZNKSt3__17num_getIcNS_19istreambuf_iteratorIcNS_11char_traitsIcEEEEE23__do_get_floating_pointIeEES4_S4_S4_RNS_8ios_baseERjRT_
 830   Symbol removed: _ZNKSt3__17num_getIcNS_19istreambuf_iteratorIcNS_11char_traitsIcEEEEE23__do_get_floating_pointIfEES4_S4_S4_RNS_8ios_baseERjRT_
 831   Symbol removed: _ZNKSt3__17num_getIwNS_19istreambuf_iteratorIwNS_11char_traitsIwEEEEE15__do_get_signedIlEES4_S4_S4_RNS_8ios_baseERjRT_
 832   Symbol removed: _ZNKSt3__17num_getIwNS_19istreambuf_iteratorIwNS_11char_traitsIwEEEEE15__do_get_signedIxEES4_S4_S4_RNS_8ios_baseERjRT_
 833   Symbol removed: _ZNKSt3__17num_getIwNS_19istreambuf_iteratorIwNS_11char_traitsIwEEEEE17__do_get_unsignedIjEES4_S4_S4_RNS_8ios_baseERjRT_
 834   Symbol removed: _ZNKSt3__17num_getIwNS_19istreambuf_iteratorIwNS_11char_traitsIwEEEEE17__do_get_unsignedImEES4_S4_S4_RNS_8ios_baseERjRT_
 835   Symbol removed: _ZNKSt3__17num_getIwNS_19istreambuf_iteratorIwNS_11char_traitsIwEEEEE17__do_get_unsignedItEES4_S4_S4_RNS_8ios_baseERjRT_
 836   Symbol removed: _ZNKSt3__17num_getIwNS_19istreambuf_iteratorIwNS_11char_traitsIwEEEEE17__do_get_unsignedIyEES4_S4_S4_RNS_8ios_baseERjRT_
 837   Symbol removed: _ZNKSt3__17num_getIwNS_19istreambuf_iteratorIwNS_11char_traitsIwEEEEE23__do_get_floating_pointIdEES4_S4_S4_RNS_8ios_baseERjRT_
 838   Symbol removed: _ZNKSt3__17num_getIwNS_19istreambuf_iteratorIwNS_11char_traitsIwEEEEE23__do_get_floating_pointIeEES4_S4_S4_RNS_8ios_baseERjRT_
 839   Symbol removed: _ZNKSt3__17num_getIwNS_19istreambuf_iteratorIwNS_11char_traitsIwEEEEE23__do_get_floating_pointIfEES4_S4_S4_RNS_8ios_baseERjRT_
 840
 841   <arch>-apple-darwin
 842   -------------------
 843   No changes
 844
 845 -----------
 846 Version 4.0
 847 -----------
 848
 849 * r290651 - Add _LIBCPP_ASSERT debug handling functions
 850
 851   All Platforms
 852   -------------
 853   Symbol added: _ZNSt3__124__libcpp_debug_exceptionC2ERKNS_19__libcpp_debug_infoE
 854   Symbol added: _ZNSt3__124__libcpp_debug_exceptionD1Ev
 855   Symbol added: _ZTINSt3__124__libcpp_debug_exceptionE
 856   Symbol added: _ZNSt3__129__libcpp_throw_debug_functionERKNS_19__libcpp_debug_infoE
 857   Symbol added: _ZNSt3__124__libcpp_debug_exceptionD2Ev
 858   Symbol added: _ZNSt3__129__libcpp_abort_debug_functionERKNS_19__libcpp_debug_infoE
 859   Symbol added: _ZNSt3__124__libcpp_debug_exceptionC2ERKS0_
 860   Symbol added: _ZNSt3__124__libcpp_debug_exceptionC1Ev
 861   Symbol added: _ZNSt3__124__libcpp_debug_exceptionC1ERKNS_19__libcpp_debug_infoE
 862   Symbol added: _ZNSt3__124__libcpp_debug_exceptionC2Ev
 863   Symbol added: _ZTSNSt3__124__libcpp_debug_exceptionE
 864   Symbol added: _ZNSt3__123__libcpp_debug_functionE
 865   Symbol added: _ZNKSt3__124__libcpp_debug_exception4whatEv
 866   Symbol added: _ZNSt3__124__libcpp_debug_exceptionC1ERKS0_
 867   Symbol added: _ZNSt3__124__libcpp_debug_exceptionD0Ev
 868   Symbol added: _ZTVNSt3__124__libcpp_debug_exceptionE
 869   Symbol added: _ZNSt3__127__libcpp_set_debug_functionEPFvRKNS_19__libcpp_debug_infoEE
 870
 871 * r288547 - Implement C++17 <variant>
 872
 873   All Platforms
 874   -------------
 875   Symbol added: _ZTVSt18bad_variant_access
 876   Symbol added: _ZTISt18bad_variant_access
 877   Symbol added: _ZTSSt18bad_variant_access
 878   Symbol added: _ZNKSt18bad_variant_access4whatEv
 879
 880 * r285537 - Remove std::string::append template methods which should be inline
 881
 882   These functions should never have had visible definitions in the dylib but
 883   since they were previously not specified with 'inline' they accidentally
 884   got emitted. This change is non-ABI breaking because every "linkage unit"
 885   must contain its own definition.
 886
 887   x86_64-linux-gnu
 888   ----------------
 889   Symbol removed: _ZNSt3__112basic_stringIcNS_11char_traitsIcEENS_9allocatorIcEEE6appendIPcEENS_9enable_ifIXaasr21__is_forward_iteratorIT_EE5valuesr38__libcpp_string_gets_noexcept_iteratorIS9_EE5valueERS5_E4typeES9_S9_
 890   Symbol removed: _ZNSt3__112basic_stringIwNS_11char_traitsIwEENS_9allocatorIwEEE6appendIPwEENS_9enable_ifIXaasr21__is_forward_iteratorIT_EE5valuesr38__libcpp_string_gets_noexcept_iteratorIS9_EE5valueERS5_E4typeES9_S9_
 891
 892   <arch>-apple-darwin
 893   -------------------
 894   No changes
 895
 896 * r285101 - Add -fvisibility-inlines-hidden when building libc++.
 897
 898   Although this change removes symbols, it should still be non-ABI breaking
 899   since all of the definitions removed are inline functions. For this reason
 900   removing these symbols is safe because every "linkage unit" which uses these
 901   functions will contain their own definition.
 902
 903   x86_64-linux-gnu
 904   ----------------
 905   Symbol removed: _ZNSt12bad_any_castD0Ev
 906   Symbol removed: _ZNSt12experimental15fundamentals_v112bad_any_castD0Ev
 907   Symbol removed: _ZNSt3__114__codecvt_utf8IDiED0Ev
 908   Symbol removed: _ZNSt3__114__codecvt_utf8IDsED0Ev
 909   Symbol removed: _ZNSt3__114__codecvt_utf8IwED0Ev
 910   Symbol removed: _ZNSt3__115__codecvt_utf16IDiLb0EED0Ev
 911   Symbol removed: _ZNSt3__115__codecvt_utf16IDiLb1EED0Ev
 912   Symbol removed: _ZNSt3__115__codecvt_utf16IDsLb0EED0Ev
 913   Symbol removed: _ZNSt3__115__codecvt_utf16IDsLb1EED0Ev
 914   Symbol removed: _ZNSt3__115__codecvt_utf16IwLb0EED0Ev
 915   Symbol removed: _ZNSt3__115__codecvt_utf16IwLb1EED0Ev
 916   Symbol removed: _ZNSt3__117__assoc_sub_stateD0Ev
 917   Symbol removed: _ZNSt3__117__assoc_sub_stateD2Ev
 918   Symbol removed: _ZNSt3__117__libcpp_sscanf_lEPKcP15__locale_structS1_z
 919   Symbol removed: _ZNSt3__119__libcpp_asprintf_lEPPcP15__locale_structPKcz
 920   Symbol removed: _ZNSt3__119__libcpp_snprintf_lEPcmP15__locale_structPKcz
 921   Symbol removed: _ZNSt3__120__codecvt_utf8_utf16IDiED0Ev
 922   Symbol removed: _ZNSt3__120__codecvt_utf8_utf16IDsED0Ev
 923   Symbol removed: _ZNSt3__120__codecvt_utf8_utf16IwED0Ev
 924
 925   <arch>-apple-darwin
 926   -------------------
 927   No Changes - inline symbols are already hidden
 928
 929 * r284206 - Implement C++17 aligned allocation in <new>
 930
 931   x86_64-linux-gnu
 932   ----------------
 933   Symbol added: _ZdaPvSt11align_val_t
 934   Symbol added: _ZdlPvSt11align_val_t
 935   Symbol added: _ZnamSt11align_val_t
 936   Symbol added: _ZdaPvmSt11align_val_t
 937   Symbol added: _ZdlPvmSt11align_val_t
 938   Symbol added: _ZdlPvSt11align_val_tRKSt9nothrow_t
 939   Symbol added: _ZnwmSt11align_val_tRKSt9nothrow_t
 940   Symbol added: _ZnamSt11align_val_tRKSt9nothrow_t
 941   Symbol added: _ZdaPvSt11align_val_tRKSt9nothrow_t
 942   Symbol added: _ZnwmSt11align_val_t
 943
 944 * r283980 - Implement C++17 <optional>
 945
 946   x86_64-linux-gnu
 947   ----------------
 948   Symbol added: _ZTISt19bad_optional_access
 949   Symbol added: _ZNSt19bad_optional_accessD0Ev
 950   Symbol added: _ZNSt19bad_optional_accessD1Ev
 951   Symbol added: _ZNSt19bad_optional_accessD2Ev
 952   Symbol added: _ZTVSt19bad_optional_access
 953   Symbol added: _ZTSSt19bad_optional_access
 954
 955 * r278310 - Implement C++17 <any>
 956
 957   x86_64-linux-gnu
 958   ----------------
 959   Symbol added: _ZNKSt12bad_any_cast4whatEv
 960   Symbol added: _ZNSt12bad_any_castD0Ev
 961   Symbol added: _ZTISt12bad_any_cast
 962   Symbol added: _ZTSSt12bad_any_cast
 963   Symbol added: _ZTVSt12bad_any_cast
 964
 965 * r295398 - Remove basic_string::insert and basic_string::replace template methods which should be inline.
 966
 967   These functions should never have had visible definitions in the dylib but
 968   since they were previously not specified with 'inline' they accidentally
 969   got emitted. This change is non-ABI breaking because every "linkage unit"
 970   must contain its own definition.
 971
 972   x86_64-linux-gnu
 973   ----------------
 974   Symbol removed: _ZNSt3__112basic_stringIcNS_11char_traitsIcEENS_9allocatorIcEEE6insertIPKcEENS_9enable_ifIXaasr21__is_forward_iteratorIT_EE5valuesr38__libcpp_string_gets_noexcept_iteratorISA_EE5valueENS_11__wrap_iterIPcEEE4typeENSB_IS8_EESA_SA_
 975   Symbol removed: _ZNSt3__112basic_stringIcNS_11char_traitsIcEENS_9allocatorIcEEE7replaceIPKcEENS_9enable_ifIXsr19__is_input_iteratorIT_EE5valueERS5_E4typeENS_11__wrap_iterIS8_EESF_SA_SA_
 976   Symbol removed: _ZNSt3__112basic_stringIwNS_11char_traitsIwEENS_9allocatorIwEEE6insertIPKwEENS_9enable_ifIXaasr21__is_forward_iteratorIT_EE5valuesr38__libcpp_string_gets_noexcept_iteratorISA_EE5valueENS_11__wrap_iterIPwEEE4typeENSB_IS8_EESA_SA_
 977   Symbol removed: _ZNSt3__112basic_stringIwNS_11char_traitsIwEENS_9allocatorIwEEE7replaceIPKwEENS_9enable_ifIXsr19__is_input_iteratorIT_EE5valueERS5_E4typeENS_11__wrap_iterIS8_EESF_SA_SA_