[compiler-rt][profile] Script for ABI checking

[phosek]

Summary

This change includes a simple script that generates a textual summary
of the library ABI which is useful when detecting ABI breaking changes.

To demonstrate the output, this script was used to generate a summary of
the profile runtime ABI which could be helpful in C++ migration, see
https://reviews.llvm.org/D118421.

The output format is intentionally similar to the output of llvm-ifs.
While llvm-ifs doesn't (yet) support static archives, such support might
be implemented in the future at which point this script could be
replaced with llvm-ifs.

Note that this script currently only supports ELF since it relies on the
--elf-output-style=JSON option.

[paulkirth]

LGTM modulo one nit.

compiler-rt/utils/generate_abi_list.py

67–68

nit: can we rename content? its a bit confusing to shadow them like this. I've suggested headers, but anything is fine.

compiler-rt/lib/profile/abi/aarch64-unknown-fuchsia.abilist

+- {Name: CurrentVNode, Size: 8, Type: Object}
+- {Name: DynamicBufferIOBuffer, Size: 8, Type: Object}
+- {Name: EndVNode, Size: 8, Type: Object}
+- {Name: FreeHook, Size: 8, Type: Object}
+- {Name: InstProfClzll, Type: Function}
+- {Name: InstProfPopcountll, Type: Function}
+- {Name: InstrProfGetRangeRepValue, Type: Function}
+- {Name: InstrProfIsSingleValRange, Type: Function}
+- {Name: VPBufferSize, Size: 4, Type: Object}
+- {Name: VPMaxNumValsPerSite, Size: 4, Type: Object}
+- {Name: VPMergeHook, Size: 8, Type: Object}
+- {Name: __ehdr_start, Size: 0, Type: None, Undefined: true}
+- {Name: __errno_location, Size: 0, Type: None, Undefined: true}
+- {Name: __llvm_get_function_addr, Type: Function}
+- {Name: __llvm_profile_begin_counters, Type: Function}
+- {Name: __llvm_profile_begin_data, Type: Function}
+- {Name: __llvm_profile_begin_names, Type: Function}
+- {Name: __llvm_profile_begin_orderfile, Type: Function}
+- {Name: __llvm_profile_begin_vnodes, Type: Function}
+- {Name: __llvm_profile_check_compatibility, Type: Function}
+- {Name: __llvm_profile_counter_bias, Size: 0, Type: None, Undefined: true}
+- {Name: __llvm_profile_counter_entry_size, Type: Function}
+- {Name: __llvm_profile_enable_continuous_mode, Type: Function}
+- {Name: __llvm_profile_end_counters, Type: Function}
+- {Name: __llvm_profile_end_data, Type: Function}
+- {Name: __llvm_profile_end_names, Type: Function}
+- {Name: __llvm_profile_end_vnodes, Type: Function}
+- {Name: __llvm_profile_filename, Size: 1, Type: Object, Weak: true}
+- {Name: __llvm_profile_get_counters_size, Type: Function}
+- {Name: __llvm_profile_get_data_size, Type: Function}
+- {Name: __llvm_profile_get_dir_mode, Type: Function}
+- {Name: __llvm_profile_get_magic, Type: Function}
+- {Name: __llvm_profile_get_num_counters, Type: Function}
+- {Name: __llvm_profile_get_num_data, Type: Function}
+- {Name: __llvm_profile_get_num_padding_bytes, Type: Function}
+- {Name: __llvm_profile_get_padding_sizes_for_counters, Type: Function}
+- {Name: __llvm_profile_get_size_for_buffer, Type: Function}
+- {Name: __llvm_profile_get_size_for_buffer_internal, Type: Function}
+- {Name: __llvm_profile_get_version, Type: Function}
+- {Name: __llvm_profile_initialize, Type: Function}
+- {Name: __llvm_profile_instrument_memop, Type: Function}
+- {Name: __llvm_profile_instrument_target, Type: Function}
+- {Name: __llvm_profile_instrument_target_value, Type: Function}
+- {Name: __llvm_profile_is_continuous_mode_enabled, Type: Function}
+- {Name: __llvm_profile_iterate_data, Type: Function}
+- {Name: __llvm_profile_merge_from_buffer, Type: Function}
+- {Name: __llvm_profile_raw_version, Size: 8, Type: Object, Weak: true}
+- {Name: __llvm_profile_recursive_mkdir, Type: Function}
+- {Name: __llvm_profile_reset_counters, Type: Function}
+- {Name: __llvm_profile_runtime, Size: 4, Type: Object}
+- {Name: __llvm_profile_set_dir_mode, Type: Function}
+- {Name: __llvm_profile_set_dumped, Type: Function}
+- {Name: __llvm_profile_set_num_value_sites, Type: Function}
+- {Name: __llvm_profile_set_page_size, Type: Function}
+- {Name: __llvm_profile_set_timestamp, Type: Function}
+- {Name: __llvm_profile_write_buffer, Type: Function}
+- {Name: __llvm_profile_write_buffer_internal, Type: Function}
+- {Name: __llvm_write_binary_ids, Type: Function}
+- {Name: __sanitizer_log_write, Size: 0, Type: None, Undefined: true}
+- {Name: __sanitizer_publish_data, Size: 0, Type: None, Undefined: true}
+- {Name: __stack_chk_fail, Size: 0, Type: None, Undefined: true}
+- {Name: __start___llvm_orderfile, Size: 0, Type: None, Undefined: true, Weak: true}
+- {Name: __start___llvm_prf_cnts, Size: 0, Type: None, Undefined: true, Weak: true}
+- {Name: __start___llvm_prf_data, Size: 0, Type: None, Undefined: true, Weak: true}
+- {Name: __start___llvm_prf_names, Size: 0, Type: None, Undefined: true, Weak: true}
+- {Name: __start___llvm_prf_vnds, Size: 0, Type: None, Undefined: true, Weak: true}
+- {Name: __stop___llvm_prf_cnts, Size: 0, Type: None, Undefined: true, Weak: true}
+- {Name: __stop___llvm_prf_data, Size: 0, Type: None, Undefined: true, Weak: true}
+- {Name: __stop___llvm_prf_names, Size: 0, Type: None, Undefined: true, Weak: true}
+- {Name: __stop___llvm_prf_vnds, Size: 0, Type: None, Undefined: true, Weak: true}
+- {Name: _zx_handle_close, Size: 0, Type: None, Undefined: true}
+- {Name: _zx_object_set_property, Size: 0, Type: None, Undefined: true}
+- {Name: _zx_status_get_string, Size: 0, Type: None, Undefined: true}
+- {Name: _zx_vmar_map, Size: 0, Type: None, Undefined: true}
+- {Name: _zx_vmar_op_range, Size: 0, Type: None, Undefined: true}
+- {Name: _zx_vmar_root_self, Size: 0, Type: None, Undefined: true}
+- {Name: _zx_vmo_create, Size: 0, Type: None, Undefined: true}
+- {Name: _zx_vmo_get_size, Size: 0, Type: None, Undefined: true}
+- {Name: _zx_vmo_set_size, Size: 0, Type: None, Undefined: true}
+- {Name: _zx_vmo_write, Size: 0, Type: None, Undefined: true}
+- {Name: atoi, Size: 0, Type: None, Undefined: true}
+- {Name: calloc, Size: 0, Type: None, Undefined: true}
+- {Name: fcntl, Size: 0, Type: None, Undefined: true}
+- {Name: fdopen, Size: 0, Type: None, Undefined: true}
+- {Name: fileno, Size: 0, Type: None, Undefined: true}
+- {Name: fprintf, Size: 0, Type: None, Undefined: true}
+- {Name: free, Size: 0, Type: None, Undefined: true}
+- {Name: getFirstValueProfRecord, Type: Function}
+- {Name: getValueProfDataSize, Type: Function}
+- {Name: getValueProfRecordHeaderSize, Type: Function}
+- {Name: getValueProfRecordNext, Type: Function}
+- {Name: getValueProfRecordNumValueData, Type: Function}
+- {Name: getValueProfRecordSize, Type: Function}
+- {Name: getValueProfRecordValueData, Type: Function}
+- {Name: getenv, Size: 0, Type: None, Undefined: true}
+- {Name: getpagesize, Size: 0, Type: None, Undefined: true}
+- {Name: getpid, Size: 0, Type: None, Undefined: true}
+- {Name: initBufferWriter, Type: Function}
+- {Name: lprofApplyPathPrefix, Type: Function}
+- {Name: lprofBoolCmpXchg, Type: Function}
+- {Name: lprofBufferIOFlush, Type: Function}
+- {Name: lprofBufferIOWrite, Type: Function}
+- {Name: lprofBufferWriter, Type: Function}
+- {Name: lprofCreateBufferIO, Type: Function}
+- {Name: lprofDeleteBufferIO, Type: Function}
+- {Name: lprofDirMode, Size: 4, Type: Object}
+- {Name: lprofFindFirstDirSeparator, Type: Function}
+- {Name: lprofFindLastDirSeparator, Type: Function}
+- {Name: lprofGetHostName, Type: Function}
+- {Name: lprofGetLoadModuleSignature, Type: Function}
+- {Name: lprofGetPathPrefix, Type: Function}
+- {Name: lprofGetVPDataReader, Type: Function}
+- {Name: lprofLockFd, Type: Function}
+- {Name: lprofLockFileHandle, Type: Function}
+- {Name: lprofOpenFileEx, Type: Function}
+- {Name: lprofProfileDumped, Type: Function}
+- {Name: lprofPtrFetchAdd, Type: Function}
+- {Name: lprofReleaseMemoryPagesToOS, Type: Function}
+- {Name: lprofRestoreSigKill, Type: Function}
+- {Name: lprofSetMaxValsPerSite, Type: Function}
+- {Name: lprofSetProfileDumped, Type: Function}
+- {Name: lprofSetupValueProfiler, Type: Function}
+- {Name: lprofSuspendSigKill, Type: Function}
+- {Name: lprofUnlockFd, Type: Function}
+- {Name: lprofUnlockFileHandle, Type: Function}
+- {Name: lprofValueProfNodes, Size: 24576, Type: Object}
+- {Name: lprofWriteData, Type: Function}
+- {Name: lprofWriteDataImpl, Type: Function}
+- {Name: lprofWriteOneBinaryId, Type: Function}
+- {Name: memcpy, Size: 0, Type: None, Undefined: true}
+- {Name: memset, Size: 0, Type: None, Undefined: true}
+- {Name: mkdir, Size: 0, Type: None, Undefined: true}
+- {Name: open, Size: 0, Type: None, Undefined: true}
+- {Name: serializeValueProfDataFrom, Type: Function}
+- {Name: serializeValueProfRecordFrom, Type: Function}
+- {Name: snprintf, Size: 0, Type: None, Undefined: true}
+- {Name: stderr, Size: 0, Type: None, Undefined: true}
+- {Name: strchr, Size: 0, Type: None, Undefined: true}
+- {Name: strlen, Size: 0, Type: None, Undefined: true}
+- {Name: strncpy, Size: 0, Type: None, Undefined: true}
+- {Name: strrchr, Size: 0, Type: None, Undefined: true}
+- {Name: uname, Size: 0, Type: None, Undefined: true}
+- {Name: vsnprintf, Size: 0, Type: None, Undefined: true}

compiler-rt/lib/profile/abi/aarch64-unknown-linux-gnu.abilist

+- {Name: CurrentVNode, Size: 8, Type: Object}
+- {Name: DynamicBufferIOBuffer, Size: 8, Type: Object}
+- {Name: EndVNode, Size: 8, Type: Object}
+- {Name: FreeHook, Size: 8, Type: Object}
+- {Name: InstProfClzll, Type: Function}
+- {Name: InstProfPopcountll, Type: Function}
+- {Name: InstrProfGetRangeRepValue, Type: Function}
+- {Name: InstrProfIsSingleValRange, Type: Function}
+- {Name: VPBufferSize, Size: 4, Type: Object}
+- {Name: VPMaxNumValsPerSite, Size: 4, Type: Object}
+- {Name: VPMergeHook, Size: 8, Type: Object}
+- {Name: __ehdr_start, Size: 0, Type: None, Undefined: true}
+- {Name: __errno_location, Size: 0, Type: None, Undefined: true}
+- {Name: __gcov_dump, Type: Function}
+- {Name: __gcov_fork, Type: Function}
+- {Name: __gcov_reset, Type: Function}
+- {Name: __llvm_get_function_addr, Type: Function}
+- {Name: __llvm_orderfile_dump, Type: Function}
+- {Name: __llvm_orderfile_write_file, Type: Function}
+- {Name: __llvm_profile_begin_counters, Type: Function}
+- {Name: __llvm_profile_begin_data, Type: Function}
+- {Name: __llvm_profile_begin_names, Type: Function}
+- {Name: __llvm_profile_begin_orderfile, Type: Function}
+- {Name: __llvm_profile_begin_vnodes, Type: Function}
+- {Name: __llvm_profile_check_compatibility, Type: Function}
+- {Name: __llvm_profile_counter_bias, Size: 8, Type: Object, Weak: true}
+- {Name: __llvm_profile_counter_bias_default, Size: 8, Type: Object}
+- {Name: __llvm_profile_counter_entry_size, Type: Function}
+- {Name: __llvm_profile_dump, Type: Function}
+- {Name: __llvm_profile_enable_continuous_mode, Type: Function}
+- {Name: __llvm_profile_end_counters, Type: Function}
+- {Name: __llvm_profile_end_data, Type: Function}
+- {Name: __llvm_profile_end_names, Type: Function}
+- {Name: __llvm_profile_end_vnodes, Type: Function}
+- {Name: __llvm_profile_filename, Size: 1, Type: Object, Weak: true}
+- {Name: __llvm_profile_get_counters_size, Type: Function}
+- {Name: __llvm_profile_get_data_size, Type: Function}
+- {Name: __llvm_profile_get_dir_mode, Type: Function}
+- {Name: __llvm_profile_get_filename, Type: Function}
+- {Name: __llvm_profile_get_magic, Type: Function}
+- {Name: __llvm_profile_get_num_counters, Type: Function}
+- {Name: __llvm_profile_get_num_data, Type: Function}
+- {Name: __llvm_profile_get_num_padding_bytes, Type: Function}
+- {Name: __llvm_profile_get_padding_sizes_for_counters, Type: Function}
+- {Name: __llvm_profile_get_path_prefix, Type: Function}
+- {Name: __llvm_profile_get_size_for_buffer, Type: Function}
+- {Name: __llvm_profile_get_size_for_buffer_internal, Type: Function}
+- {Name: __llvm_profile_get_version, Type: Function}
+- {Name: __llvm_profile_initialize, Type: Function}
+- {Name: __llvm_profile_initialize_file, Type: Function}
+- {Name: __llvm_profile_instrument_memop, Type: Function}
+- {Name: __llvm_profile_instrument_target, Type: Function}
+- {Name: __llvm_profile_instrument_target_value, Type: Function}
+- {Name: __llvm_profile_is_continuous_mode_enabled, Type: Function}
+- {Name: __llvm_profile_iterate_data, Type: Function}
+- {Name: __llvm_profile_merge_from_buffer, Type: Function}
+- {Name: __llvm_profile_raw_version, Size: 8, Type: Object, Weak: true}
+- {Name: __llvm_profile_recursive_mkdir, Type: Function}
+- {Name: __llvm_profile_register_write_file_atexit, Type: Function}
+- {Name: __llvm_profile_reset_counters, Type: Function}
+- {Name: __llvm_profile_runtime, Size: 4, Type: Object}
+- {Name: __llvm_profile_set_dir_mode, Type: Function}
+- {Name: __llvm_profile_set_dumped, Type: Function}
+- {Name: __llvm_profile_set_file_object, Type: Function}
+- {Name: __llvm_profile_set_filename, Type: Function}
+- {Name: __llvm_profile_set_num_value_sites, Type: Function}
+- {Name: __llvm_profile_set_page_size, Type: Function}
+- {Name: __llvm_profile_set_timestamp, Type: Function}
+- {Name: __llvm_profile_write_buffer, Type: Function}
+- {Name: __llvm_profile_write_buffer_internal, Type: Function}
+- {Name: __llvm_profile_write_file, Type: Function}
+- {Name: __llvm_write_binary_ids, Type: Function}
+- {Name: __start___llvm_orderfile, Size: 0, Type: None, Undefined: true, Weak: true}
+- {Name: __start___llvm_prf_cnts, Size: 0, Type: None, Undefined: true, Weak: true}
+- {Name: __start___llvm_prf_data, Size: 0, Type: None, Undefined: true, Weak: true}
+- {Name: __start___llvm_prf_names, Size: 0, Type: None, Undefined: true, Weak: true}
+- {Name: __start___llvm_prf_vnds, Size: 0, Type: None, Undefined: true, Weak: true}
+- {Name: __stop___llvm_prf_cnts, Size: 0, Type: None, Undefined: true, Weak: true}
+- {Name: __stop___llvm_prf_data, Size: 0, Type: None, Undefined: true, Weak: true}
+- {Name: __stop___llvm_prf_names, Size: 0, Type: None, Undefined: true, Weak: true}
+- {Name: __stop___llvm_prf_vnds, Size: 0, Type: None, Undefined: true, Weak: true}
+- {Name: __strdup, Size: 0, Type: None, Undefined: true}
+- {Name: atexit, Size: 0, Type: None, Undefined: true}
+- {Name: calloc, Size: 0, Type: None, Undefined: true}
+- {Name: fclose, Size: 0, Type: None, Undefined: true}
+- {Name: fcntl, Size: 0, Type: None, Undefined: true}
+- {Name: fdopen, Size: 0, Type: None, Undefined: true}
+- {Name: fflush, Size: 0, Type: None, Undefined: true}
+- {Name: fileno, Size: 0, Type: None, Undefined: true}
+- {Name: fopen, Size: 0, Type: None, Undefined: true}
+- {Name: fork, Size: 0, Type: None, Undefined: true}
+- {Name: fprintf, Size: 0, Type: None, Undefined: true}
+- {Name: free, Size: 0, Type: None, Undefined: true}
+- {Name: fseek, Size: 0, Type: None, Undefined: true}
+- {Name: ftell, Size: 0, Type: None, Undefined: true}
+- {Name: ftruncate, Size: 0, Type: None, Undefined: true}
+- {Name: fwrite, Size: 0, Type: None, Undefined: true}
+- {Name: getFirstValueProfRecord, Type: Function}
+- {Name: getValueProfDataSize, Type: Function}
+- {Name: getValueProfRecordHeaderSize, Type: Function}
+- {Name: getValueProfRecordNext, Type: Function}
+- {Name: getValueProfRecordNumValueData, Type: Function}
+- {Name: getValueProfRecordSize, Type: Function}
+- {Name: getValueProfRecordValueData, Type: Function}
+- {Name: getenv, Size: 0, Type: None, Undefined: true}
+- {Name: getpagesize, Size: 0, Type: None, Undefined: true}
+- {Name: getpid, Size: 0, Type: None, Undefined: true}
+- {Name: initBufferWriter, Type: Function}
+- {Name: llvm_delete_reset_function_list, Type: Function}
+- {Name: llvm_gcda_emit_arcs, Type: Function}
+- {Name: llvm_gcda_emit_function, Type: Function}
+- {Name: llvm_gcda_end_file, Type: Function}
+- {Name: llvm_gcda_start_file, Type: Function}
+- {Name: llvm_gcda_summary_info, Type: Function}
+- {Name: llvm_gcov_init, Type: Function}
+- {Name: llvm_register_reset_function, Type: Function}
+- {Name: llvm_register_writeout_function, Type: Function}
+- {Name: llvm_reset_counters, Type: Function}
+- {Name: llvm_writeout_files, Type: Function}
+- {Name: lprofApplyPathPrefix, Type: Function}
+- {Name: lprofBoolCmpXchg, Type: Function}
+- {Name: lprofBufferIOFlush, Type: Function}
+- {Name: lprofBufferIOWrite, Type: Function}
+- {Name: lprofBufferWriter, Type: Function}
+- {Name: lprofCreateBufferIO, Type: Function}
+- {Name: lprofCreateBufferIOInternal, Type: Function}
+- {Name: lprofDeleteBufferIO, Type: Function}
+- {Name: lprofDirMode, Size: 4, Type: Object}
+- {Name: lprofFindFirstDirSeparator, Type: Function}
+- {Name: lprofFindLastDirSeparator, Type: Function}
+- {Name: lprofGetHostName, Type: Function}
+- {Name: lprofGetLoadModuleSignature, Type: Function}
+- {Name: lprofGetPathPrefix, Type: Function}
+- {Name: lprofGetVPDataReader, Type: Function}
+- {Name: lprofLockFd, Type: Function}
+- {Name: lprofLockFileHandle, Type: Function}
+- {Name: lprofMergeValueProfData, Type: Function}
+- {Name: lprofOpenFileEx, Type: Function}
+- {Name: lprofProfileDumped, Type: Function}
+- {Name: lprofPtrFetchAdd, Type: Function}
+- {Name: lprofReleaseMemoryPagesToOS, Type: Function}
+- {Name: lprofRestoreSigKill, Type: Function}
+- {Name: lprofSetMaxValsPerSite, Type: Function}
+- {Name: lprofSetProfileDumped, Type: Function}
+- {Name: lprofSetupValueProfiler, Type: Function}
+- {Name: lprofSuspendSigKill, Type: Function}
+- {Name: lprofUnlockFd, Type: Function}
+- {Name: lprofUnlockFileHandle, Type: Function}
+- {Name: lprofValueProfNodes, Size: 24576, Type: Object}
+- {Name: lprofWriteData, Type: Function}
+- {Name: lprofWriteDataImpl, Type: Function}
+- {Name: lprofWriteOneBinaryId, Type: Function}
+- {Name: madvise, Size: 0, Type: None, Undefined: true}
+- {Name: malloc, Size: 0, Type: None, Undefined: true}
+- {Name: memcpy, Size: 0, Type: None, Undefined: true}
+- {Name: memset, Size: 0, Type: None, Undefined: true}
+- {Name: mkdir, Size: 0, Type: None, Undefined: true}
+- {Name: mmap, Size: 0, Type: None, Undefined: true}
+- {Name: munmap, Size: 0, Type: None, Undefined: true}
+- {Name: open, Size: 0, Type: None, Undefined: true}
+- {Name: prctl, Size: 0, Type: None, Undefined: true}
+- {Name: realloc, Size: 0, Type: None, Undefined: true}
+- {Name: reset_fn_list, Size: 16, Type: Object}
+- {Name: serializeValueProfDataFrom, Type: Function}
+- {Name: serializeValueProfRecordFrom, Type: Function}
+- {Name: setenv, Size: 0, Type: None, Undefined: true}
+- {Name: snprintf, Size: 0, Type: None, Undefined: true}
+- {Name: stderr, Size: 0, Type: None, Undefined: true}
+- {Name: strchr, Size: 0, Type: None, Undefined: true}
+- {Name: strcmp, Size: 0, Type: None, Undefined: true}
+- {Name: strerror, Size: 0, Type: None, Undefined: true}
+- {Name: strlen, Size: 0, Type: None, Undefined: true}
+- {Name: strncpy, Size: 0, Type: None, Undefined: true}
+- {Name: strrchr, Size: 0, Type: None, Undefined: true}
+- {Name: strtol, Size: 0, Type: None, Undefined: true}
+- {Name: uname, Size: 0, Type: None, Undefined: true}
+- {Name: writeout_fn_list, Size: 16, Type: Object}

compiler-rt/lib/profile/abi/x86_64-unknown-fuchsia.abilist

+- {Name: CurrentVNode, Size: 8, Type: Object}
+- {Name: DynamicBufferIOBuffer, Size: 8, Type: Object}
+- {Name: EndVNode, Size: 8, Type: Object}
+- {Name: FreeHook, Size: 8, Type: Object}
+- {Name: InstProfClzll, Type: Function}
+- {Name: InstProfPopcountll, Type: Function}
+- {Name: InstrProfGetRangeRepValue, Type: Function}
+- {Name: InstrProfIsSingleValRange, Type: Function}
+- {Name: VPBufferSize, Size: 4, Type: Object}
+- {Name: VPMaxNumValsPerSite, Size: 4, Type: Object}
+- {Name: VPMergeHook, Size: 8, Type: Object}
+- {Name: __ehdr_start, Size: 0, Type: None, Undefined: true}
+- {Name: __errno_location, Size: 0, Type: None, Undefined: true}
+- {Name: __llvm_get_function_addr, Type: Function}
+- {Name: __llvm_profile_begin_counters, Type: Function}
+- {Name: __llvm_profile_begin_data, Type: Function}
+- {Name: __llvm_profile_begin_names, Type: Function}
+- {Name: __llvm_profile_begin_orderfile, Type: Function}
+- {Name: __llvm_profile_begin_vnodes, Type: Function}
+- {Name: __llvm_profile_check_compatibility, Type: Function}
+- {Name: __llvm_profile_counter_bias, Size: 0, Type: None, Undefined: true}
+- {Name: __llvm_profile_counter_entry_size, Type: Function}
+- {Name: __llvm_profile_enable_continuous_mode, Type: Function}
+- {Name: __llvm_profile_end_counters, Type: Function}
+- {Name: __llvm_profile_end_data, Type: Function}
+- {Name: __llvm_profile_end_names, Type: Function}
+- {Name: __llvm_profile_end_vnodes, Type: Function}
+- {Name: __llvm_profile_filename, Size: 1, Type: Object, Weak: true}
+- {Name: __llvm_profile_get_counters_size, Type: Function}
+- {Name: __llvm_profile_get_data_size, Type: Function}
+- {Name: __llvm_profile_get_dir_mode, Type: Function}
+- {Name: __llvm_profile_get_magic, Type: Function}
+- {Name: __llvm_profile_get_num_counters, Type: Function}
+- {Name: __llvm_profile_get_num_data, Type: Function}
+- {Name: __llvm_profile_get_num_padding_bytes, Type: Function}
+- {Name: __llvm_profile_get_padding_sizes_for_counters, Type: Function}
+- {Name: __llvm_profile_get_size_for_buffer, Type: Function}
+- {Name: __llvm_profile_get_size_for_buffer_internal, Type: Function}
+- {Name: __llvm_profile_get_version, Type: Function}
+- {Name: __llvm_profile_initialize, Type: Function}
+- {Name: __llvm_profile_instrument_memop, Type: Function}
+- {Name: __llvm_profile_instrument_target, Type: Function}
+- {Name: __llvm_profile_instrument_target_value, Type: Function}
+- {Name: __llvm_profile_is_continuous_mode_enabled, Type: Function}
+- {Name: __llvm_profile_iterate_data, Type: Function}
+- {Name: __llvm_profile_merge_from_buffer, Type: Function}
+- {Name: __llvm_profile_raw_version, Size: 8, Type: Object, Weak: true}
+- {Name: __llvm_profile_recursive_mkdir, Type: Function}
+- {Name: __llvm_profile_reset_counters, Type: Function}
+- {Name: __llvm_profile_runtime, Size: 4, Type: Object}
+- {Name: __llvm_profile_set_dir_mode, Type: Function}
+- {Name: __llvm_profile_set_dumped, Type: Function}
+- {Name: __llvm_profile_set_num_value_sites, Type: Function}
+- {Name: __llvm_profile_set_page_size, Type: Function}
+- {Name: __llvm_profile_set_timestamp, Type: Function}
+- {Name: __llvm_profile_write_buffer, Type: Function}
+- {Name: __llvm_profile_write_buffer_internal, Type: Function}
+- {Name: __llvm_write_binary_ids, Type: Function}
+- {Name: __sanitizer_log_write, Size: 0, Type: None, Undefined: true}
+- {Name: __sanitizer_publish_data, Size: 0, Type: None, Undefined: true}
+- {Name: __stack_chk_fail, Size: 0, Type: None, Undefined: true}
+- {Name: __start___llvm_orderfile, Size: 0, Type: None, Undefined: true, Weak: true}
+- {Name: __start___llvm_prf_cnts, Size: 0, Type: None, Undefined: true, Weak: true}
+- {Name: __start___llvm_prf_data, Size: 0, Type: None, Undefined: true, Weak: true}
+- {Name: __start___llvm_prf_names, Size: 0, Type: None, Undefined: true, Weak: true}
+- {Name: __start___llvm_prf_vnds, Size: 0, Type: None, Undefined: true, Weak: true}
+- {Name: __stop___llvm_prf_cnts, Size: 0, Type: None, Undefined: true, Weak: true}
+- {Name: __stop___llvm_prf_data, Size: 0, Type: None, Undefined: true, Weak: true}
+- {Name: __stop___llvm_prf_names, Size: 0, Type: None, Undefined: true, Weak: true}
+- {Name: __stop___llvm_prf_vnds, Size: 0, Type: None, Undefined: true, Weak: true}
+- {Name: _zx_handle_close, Size: 0, Type: None, Undefined: true}
+- {Name: _zx_object_set_property, Size: 0, Type: None, Undefined: true}
+- {Name: _zx_status_get_string, Size: 0, Type: None, Undefined: true}
+- {Name: _zx_vmar_map, Size: 0, Type: None, Undefined: true}
+- {Name: _zx_vmar_op_range, Size: 0, Type: None, Undefined: true}
+- {Name: _zx_vmar_root_self, Size: 0, Type: None, Undefined: true}
+- {Name: _zx_vmo_create, Size: 0, Type: None, Undefined: true}
+- {Name: _zx_vmo_get_size, Size: 0, Type: None, Undefined: true}
+- {Name: _zx_vmo_set_size, Size: 0, Type: None, Undefined: true}
+- {Name: _zx_vmo_write, Size: 0, Type: None, Undefined: true}
+- {Name: atoi, Size: 0, Type: None, Undefined: true}
+- {Name: calloc, Size: 0, Type: None, Undefined: true}
+- {Name: fcntl, Size: 0, Type: None, Undefined: true}
+- {Name: fdopen, Size: 0, Type: None, Undefined: true}
+- {Name: fileno, Size: 0, Type: None, Undefined: true}
+- {Name: fprintf, Size: 0, Type: None, Undefined: true}
+- {Name: free, Size: 0, Type: None, Undefined: true}
+- {Name: getFirstValueProfRecord, Type: Function}
+- {Name: getValueProfDataSize, Type: Function}
+- {Name: getValueProfRecordHeaderSize, Type: Function}
+- {Name: getValueProfRecordNext, Type: Function}
+- {Name: getValueProfRecordNumValueData, Type: Function}
+- {Name: getValueProfRecordSize, Type: Function}
+- {Name: getValueProfRecordValueData, Type: Function}
+- {Name: getenv, Size: 0, Type: None, Undefined: true}
+- {Name: getpagesize, Size: 0, Type: None, Undefined: true}
+- {Name: getpid, Size: 0, Type: None, Undefined: true}
+- {Name: initBufferWriter, Type: Function}
+- {Name: lprofApplyPathPrefix, Type: Function}
+- {Name: lprofBufferIOFlush, Type: Function}
+- {Name: lprofBufferIOWrite, Type: Function}
+- {Name: lprofBufferWriter, Type: Function}
+- {Name: lprofCreateBufferIO, Type: Function}
+- {Name: lprofDeleteBufferIO, Type: Function}
+- {Name: lprofDirMode, Size: 4, Type: Object}
+- {Name: lprofFindFirstDirSeparator, Type: Function}
+- {Name: lprofFindLastDirSeparator, Type: Function}
+- {Name: lprofGetHostName, Type: Function}
+- {Name: lprofGetLoadModuleSignature, Type: Function}
+- {Name: lprofGetPathPrefix, Type: Function}
+- {Name: lprofGetVPDataReader, Type: Function}
+- {Name: lprofLockFd, Type: Function}
+- {Name: lprofLockFileHandle, Type: Function}
+- {Name: lprofOpenFileEx, Type: Function}
+- {Name: lprofProfileDumped, Type: Function}
+- {Name: lprofReleaseMemoryPagesToOS, Type: Function}
+- {Name: lprofRestoreSigKill, Type: Function}
+- {Name: lprofSetMaxValsPerSite, Type: Function}
+- {Name: lprofSetProfileDumped, Type: Function}
+- {Name: lprofSetupValueProfiler, Type: Function}
+- {Name: lprofSuspendSigKill, Type: Function}
+- {Name: lprofUnlockFd, Type: Function}
+- {Name: lprofUnlockFileHandle, Type: Function}
+- {Name: lprofValueProfNodes, Size: 24576, Type: Object}
+- {Name: lprofWriteData, Type: Function}
+- {Name: lprofWriteDataImpl, Type: Function}
+- {Name: lprofWriteOneBinaryId, Type: Function}
+- {Name: memcpy, Size: 0, Type: None, Undefined: true}
+- {Name: memset, Size: 0, Type: None, Undefined: true}
+- {Name: mkdir, Size: 0, Type: None, Undefined: true}
+- {Name: open, Size: 0, Type: None, Undefined: true}
+- {Name: serializeValueProfDataFrom, Type: Function}
+- {Name: serializeValueProfRecordFrom, Type: Function}
+- {Name: snprintf, Size: 0, Type: None, Undefined: true}
+- {Name: stderr, Size: 0, Type: None, Undefined: true}
+- {Name: strchr, Size: 0, Type: None, Undefined: true}
+- {Name: strlen, Size: 0, Type: None, Undefined: true}
+- {Name: strncpy, Size: 0, Type: None, Undefined: true}
+- {Name: strrchr, Size: 0, Type: None, Undefined: true}
+- {Name: uname, Size: 0, Type: None, Undefined: true}
+- {Name: vsnprintf, Size: 0, Type: None, Undefined: true}

compiler-rt/lib/profile/abi/x86_64-unknown-linux-gnu.abilist

+- {Name: CurrentVNode, Size: 8, Type: Object}
+- {Name: DynamicBufferIOBuffer, Size: 8, Type: Object}
+- {Name: EndVNode, Size: 8, Type: Object}
+- {Name: FreeHook, Size: 8, Type: Object}
+- {Name: InstProfClzll, Type: Function}
+- {Name: InstProfPopcountll, Type: Function}
+- {Name: InstrProfGetRangeRepValue, Type: Function}
+- {Name: InstrProfIsSingleValRange, Type: Function}
+- {Name: VPBufferSize, Size: 4, Type: Object}
+- {Name: VPMaxNumValsPerSite, Size: 4, Type: Object}
+- {Name: VPMergeHook, Size: 8, Type: Object}
+- {Name: __ehdr_start, Size: 0, Type: None, Undefined: true}
+- {Name: __errno_location, Size: 0, Type: None, Undefined: true}
+- {Name: __gcov_dump, Type: Function}
+- {Name: __gcov_fork, Type: Function}
+- {Name: __gcov_reset, Type: Function}
+- {Name: __llvm_get_function_addr, Type: Function}
+- {Name: __llvm_orderfile_dump, Type: Function}
+- {Name: __llvm_orderfile_write_file, Type: Function}
+- {Name: __llvm_profile_begin_counters, Type: Function}
+- {Name: __llvm_profile_begin_data, Type: Function}
+- {Name: __llvm_profile_begin_names, Type: Function}
+- {Name: __llvm_profile_begin_orderfile, Type: Function}
+- {Name: __llvm_profile_begin_vnodes, Type: Function}
+- {Name: __llvm_profile_check_compatibility, Type: Function}
+- {Name: __llvm_profile_counter_bias, Size: 8, Type: Object, Weak: true}
+- {Name: __llvm_profile_counter_bias_default, Size: 8, Type: Object}
+- {Name: __llvm_profile_counter_entry_size, Type: Function}
+- {Name: __llvm_profile_dump, Type: Function}
+- {Name: __llvm_profile_enable_continuous_mode, Type: Function}
+- {Name: __llvm_profile_end_counters, Type: Function}
+- {Name: __llvm_profile_end_data, Type: Function}
+- {Name: __llvm_profile_end_names, Type: Function}
+- {Name: __llvm_profile_end_vnodes, Type: Function}
+- {Name: __llvm_profile_filename, Size: 1, Type: Object, Weak: true}
+- {Name: __llvm_profile_get_counters_size, Type: Function}
+- {Name: __llvm_profile_get_data_size, Type: Function}
+- {Name: __llvm_profile_get_dir_mode, Type: Function}
+- {Name: __llvm_profile_get_filename, Type: Function}
+- {Name: __llvm_profile_get_magic, Type: Function}
+- {Name: __llvm_profile_get_num_counters, Type: Function}
+- {Name: __llvm_profile_get_num_data, Type: Function}
+- {Name: __llvm_profile_get_num_padding_bytes, Type: Function}
+- {Name: __llvm_profile_get_padding_sizes_for_counters, Type: Function}
+- {Name: __llvm_profile_get_path_prefix, Type: Function}
+- {Name: __llvm_profile_get_size_for_buffer, Type: Function}
+- {Name: __llvm_profile_get_size_for_buffer_internal, Type: Function}
+- {Name: __llvm_profile_get_version, Type: Function}
+- {Name: __llvm_profile_initialize, Type: Function}
+- {Name: __llvm_profile_initialize_file, Type: Function}
+- {Name: __llvm_profile_instrument_memop, Type: Function}
+- {Name: __llvm_profile_instrument_target, Type: Function}
+- {Name: __llvm_profile_instrument_target_value, Type: Function}
+- {Name: __llvm_profile_is_continuous_mode_enabled, Type: Function}
+- {Name: __llvm_profile_iterate_data, Type: Function}
+- {Name: __llvm_profile_merge_from_buffer, Type: Function}
+- {Name: __llvm_profile_raw_version, Size: 8, Type: Object, Weak: true}
+- {Name: __llvm_profile_recursive_mkdir, Type: Function}
+- {Name: __llvm_profile_register_write_file_atexit, Type: Function}
+- {Name: __llvm_profile_reset_counters, Type: Function}
+- {Name: __llvm_profile_runtime, Size: 4, Type: Object}
+- {Name: __llvm_profile_set_dir_mode, Type: Function}
+- {Name: __llvm_profile_set_dumped, Type: Function}
+- {Name: __llvm_profile_set_file_object, Type: Function}
+- {Name: __llvm_profile_set_filename, Type: Function}
+- {Name: __llvm_profile_set_num_value_sites, Type: Function}
+- {Name: __llvm_profile_set_page_size, Type: Function}
+- {Name: __llvm_profile_set_timestamp, Type: Function}
+- {Name: __llvm_profile_write_buffer, Type: Function}
+- {Name: __llvm_profile_write_buffer_internal, Type: Function}
+- {Name: __llvm_profile_write_file, Type: Function}
+- {Name: __llvm_write_binary_ids, Type: Function}
+- {Name: __start___llvm_orderfile, Size: 0, Type: None, Undefined: true, Weak: true}
+- {Name: __start___llvm_prf_cnts, Size: 0, Type: None, Undefined: true, Weak: true}
+- {Name: __start___llvm_prf_data, Size: 0, Type: None, Undefined: true, Weak: true}
+- {Name: __start___llvm_prf_names, Size: 0, Type: None, Undefined: true, Weak: true}
+- {Name: __start___llvm_prf_vnds, Size: 0, Type: None, Undefined: true, Weak: true}
+- {Name: __stop___llvm_prf_cnts, Size: 0, Type: None, Undefined: true, Weak: true}
+- {Name: __stop___llvm_prf_data, Size: 0, Type: None, Undefined: true, Weak: true}
+- {Name: __stop___llvm_prf_names, Size: 0, Type: None, Undefined: true, Weak: true}
+- {Name: __stop___llvm_prf_vnds, Size: 0, Type: None, Undefined: true, Weak: true}
+- {Name: __strdup, Size: 0, Type: None, Undefined: true}
+- {Name: atexit, Size: 0, Type: None, Undefined: true}
+- {Name: calloc, Size: 0, Type: None, Undefined: true}
+- {Name: fclose, Size: 0, Type: None, Undefined: true}
+- {Name: fcntl, Size: 0, Type: None, Undefined: true}
+- {Name: fdopen, Size: 0, Type: None, Undefined: true}
+- {Name: fflush, Size: 0, Type: None, Undefined: true}
+- {Name: fileno, Size: 0, Type: None, Undefined: true}
+- {Name: fopen, Size: 0, Type: None, Undefined: true}
+- {Name: fork, Size: 0, Type: None, Undefined: true}
+- {Name: fprintf, Size: 0, Type: None, Undefined: true}
+- {Name: free, Size: 0, Type: None, Undefined: true}
+- {Name: fseek, Size: 0, Type: None, Undefined: true}
+- {Name: ftell, Size: 0, Type: None, Undefined: true}
+- {Name: ftruncate, Size: 0, Type: None, Undefined: true}
+- {Name: fwrite, Size: 0, Type: None, Undefined: true}
+- {Name: getFirstValueProfRecord, Type: Function}
+- {Name: getValueProfDataSize, Type: Function}
+- {Name: getValueProfRecordHeaderSize, Type: Function}
+- {Name: getValueProfRecordNext, Type: Function}
+- {Name: getValueProfRecordNumValueData, Type: Function}
+- {Name: getValueProfRecordSize, Type: Function}
+- {Name: getValueProfRecordValueData, Type: Function}
+- {Name: getenv, Size: 0, Type: None, Undefined: true}
+- {Name: getpagesize, Size: 0, Type: None, Undefined: true}
+- {Name: getpid, Size: 0, Type: None, Undefined: true}
+- {Name: initBufferWriter, Type: Function}
+- {Name: llvm_delete_reset_function_list, Type: Function}
+- {Name: llvm_gcda_emit_arcs, Type: Function}
+- {Name: llvm_gcda_emit_function, Type: Function}
+- {Name: llvm_gcda_end_file, Type: Function}
+- {Name: llvm_gcda_start_file, Type: Function}
+- {Name: llvm_gcda_summary_info, Type: Function}
+- {Name: llvm_gcov_init, Type: Function}
+- {Name: llvm_register_reset_function, Type: Function}
+- {Name: llvm_register_writeout_function, Type: Function}
+- {Name: llvm_reset_counters, Type: Function}
+- {Name: llvm_writeout_files, Type: Function}
+- {Name: lprofApplyPathPrefix, Type: Function}
+- {Name: lprofBufferIOFlush, Type: Function}
+- {Name: lprofBufferIOWrite, Type: Function}
+- {Name: lprofBufferWriter, Type: Function}
+- {Name: lprofCreateBufferIO, Type: Function}
+- {Name: lprofCreateBufferIOInternal, Type: Function}
+- {Name: lprofDeleteBufferIO, Type: Function}
+- {Name: lprofDirMode, Size: 4, Type: Object}
+- {Name: lprofFindFirstDirSeparator, Type: Function}
+- {Name: lprofFindLastDirSeparator, Type: Function}
+- {Name: lprofGetHostName, Type: Function}
+- {Name: lprofGetLoadModuleSignature, Type: Function}
+- {Name: lprofGetPathPrefix, Type: Function}
+- {Name: lprofGetVPDataReader, Type: Function}
+- {Name: lprofLockFd, Type: Function}
+- {Name: lprofLockFileHandle, Type: Function}
+- {Name: lprofMergeValueProfData, Type: Function}
+- {Name: lprofOpenFileEx, Type: Function}
+- {Name: lprofProfileDumped, Type: Function}
+- {Name: lprofReleaseMemoryPagesToOS, Type: Function}
+- {Name: lprofRestoreSigKill, Type: Function}
+- {Name: lprofSetMaxValsPerSite, Type: Function}
+- {Name: lprofSetProfileDumped, Type: Function}
+- {Name: lprofSetupValueProfiler, Type: Function}
+- {Name: lprofSuspendSigKill, Type: Function}
+- {Name: lprofUnlockFd, Type: Function}
+- {Name: lprofUnlockFileHandle, Type: Function}
+- {Name: lprofValueProfNodes, Size: 24576, Type: Object}
+- {Name: lprofWriteData, Type: Function}
+- {Name: lprofWriteDataImpl, Type: Function}
+- {Name: lprofWriteOneBinaryId, Type: Function}
+- {Name: madvise, Size: 0, Type: None, Undefined: true}
+- {Name: malloc, Size: 0, Type: None, Undefined: true}
+- {Name: memcpy, Size: 0, Type: None, Undefined: true}
+- {Name: memset, Size: 0, Type: None, Undefined: true}
+- {Name: mkdir, Size: 0, Type: None, Undefined: true}
+- {Name: mmap, Size: 0, Type: None, Undefined: true}
+- {Name: munmap, Size: 0, Type: None, Undefined: true}
+- {Name: open, Size: 0, Type: None, Undefined: true}
+- {Name: prctl, Size: 0, Type: None, Undefined: true}
+- {Name: realloc, Size: 0, Type: None, Undefined: true}
+- {Name: reset_fn_list, Size: 16, Type: Object}
+- {Name: serializeValueProfDataFrom, Type: Function}
+- {Name: serializeValueProfRecordFrom, Type: Function}
+- {Name: setenv, Size: 0, Type: None, Undefined: true}
+- {Name: snprintf, Size: 0, Type: None, Undefined: true}
+- {Name: stderr, Size: 0, Type: None, Undefined: true}
+- {Name: strchr, Size: 0, Type: None, Undefined: true}
+- {Name: strcmp, Size: 0, Type: None, Undefined: true}
+- {Name: strerror, Size: 0, Type: None, Undefined: true}
+- {Name: strlen, Size: 0, Type: None, Undefined: true}
+- {Name: strncpy, Size: 0, Type: None, Undefined: true}
+- {Name: strrchr, Size: 0, Type: None, Undefined: true}
+- {Name: strtol, Size: 0, Type: None, Undefined: true}
+- {Name: uname, Size: 0, Type: None, Undefined: true}
+- {Name: writeout_fn_list, Size: 16, Type: Object}

compiler-rt/utils/generate_abi_list.py

+#!/usr/bin/env python3
+#===----------------------------------------------------------------------===##
+#
+# Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+# See https://llvm.org/LICENSE.txt for license information.
+# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+#
+#===----------------------------------------------------------------------===##
+
+# Generates a textual summary of the library ABI which is useful when
+# detecting ABI breaking changes in compiler-rt runtimes.
+#
+# The output format is intentionally similar to the output of llvm-ifs.
+# While llvm-ifs doesn't (yet) support static archives, such support might
+# be implemented in the future at which point this script could be
+# replaced with llvm-ifs.
+#
+# TODO: This script currently only supports ELF since it relies on the
+# --elf-output-style=JSON option.
+
+import argparse
+import io
+import sys
+import subprocess
+import json
+import yaml
+
+from operator import itemgetter
+from pathlib import Path
+from shutil import which
+
+IGNORE_NAMES = ['_init', '_fini']
+
+
+def OutputFile(file):
+    if isinstance(file, io.IOBase):
+        return file
+    assert isinstance(file, Path), '{} is not a str'.format(file)
+    return open(file, 'w', newline='\n')
+
+
+def main(argv):
+    parser = argparse.ArgumentParser(
+        description='Extract a list of symbols from a shared library.')
+    parser.add_argument('library',
+                        metavar='LIB',
+                        type=str,
+                        help='The library to extract symbols from')
+    parser.add_argument('-o',
+                        '--output',
+                        dest='output',
+                        type=OutputFile,
+                        default=sys.stdout,
+                        help='The output file (default: stdout)')
+    parser.add_argument('--tool',
+                        dest='tool',
+                        type=Path,
+                        default=which('llvm-readobj'),
+                        help='Path to llvm-readobj tool (default: %(default)s)')
+    args = parser.parse_args(argv)
+
+    cmd = [args.tool, '--elf-output-style=JSON', '--symbols', args.library]
+    out = subprocess.check_output(cmd)
+    files = json.loads(out)
+
+    symbols = {}
+    for content in files:
+        for content in content['Symbols']:
+            symbol = content['Symbol']
+            name = symbol['Name']['Name']
+            type = symbol['Type']['Name']
+            section = symbol['Section']['Name']
+            size = symbol['Size']
+            binding = symbol['Binding']['Name']
+
+            if name in IGNORE_NAMES:
+                continue
+            if type == 'Section':
+                continue
+            if binding == 'Local':
+                continue
+
+            if name in symbols:
+                symbol = symbols[name]
+                if not symbol.get('Undefined', False):
+                    continue
+
+            symbol = {
+                'Name': name,
+                'Type': type,
+            }
+            assert symbol['Type'] in ['Function', 'None', 'Object', 'TLS']
+            if symbol['Type'] != 'Function':
+                symbol['Size'] = int(size)
+            if section == 'Undefined':
+                symbol['Undefined'] = True
+            if binding == 'Weak':
+                symbol['Weak'] = True
+            symbols[name] = symbol
+
+    yaml.safe_dump(sorted(symbols.values(), key=itemgetter('Name')),
+                   args.output, default_flow_style=None, width=sys.maxsize)
+
+    return 0
+
+
+if __name__ == '__main__':
+    main(sys.argv[1:])