PR: https://github.com/libevent/libevent/pull/1045

* release-2.1.12-stable-pull:
  Update ChangeLog
  ci/linux: create dist artifact only if dist archive was built
  Merge branch 'fix-signal-leak'
  test: fix leak in dns/getaddrinfo_cancel_stress
  test: fix UB in evbuffer/empty_reference_prepend_buffer
  ci: set build type to debug with sanitizers
  test: really disable bufferevent_pair_release_lock under ASAN (and fix gcc)
  test-closed: fix leak
  test-export: adjust libevent version
  cmake: set rpath for libraries on linux
  test-export: compatible with all versions of visual studio
  Bump version to 2.1.12-stable (w/o ABI breakage)
  ci: run ABI for release-*-pull branches too
  Purge travis-ci config
  Purge appveyor config
  Bump ChangeLog for 2.1.12
  Update AUTHORS for 2.1.12
  Backport github actions to 2.1
  test: add getaddrinfo(AI_ADDRCONFIG) test (off by default)
  build: remove duplicate -Wredundant-decls
  test: fix memory leaks for https (add BEV_OPT_CLOSE_ON_FREE)
  test: "fix" (with a quirk) leak in ssl/bufferevent_wm (w/o defer callbacks)
  test: disable bufferevent/bufferevent_pair_release_lock under ASAN (too tricky)
  test: detect test failures if atexit handler calls _exit(!0) (sanitizers)
  Make all classes Entry, Struct, etc) new-style classes
  buffer: do not pass NULL to memcpy() from evbuffer_pullup()
  test: do not pass NULL to memcmp() in evbuffer_datacmp() helper
  http: fix undefined-shift in EVUTIL_IS*_ helpers
  Check error code of evhttp_add_header_internal() in evhttp_parse_query_impl()
  cmake: avoid problems from use of CMAKE_USE_PTHREADS_INIT
  test/regress_testutils: use inet_addr()
  remove FindGit.cmake, improve `git describe` command
  checkpatch.sh: fix clang-format-diff usage
  checkpatch.sh: fix usage
  Fix clang-format-diff usage
  variable redefinition in win32_dispatch
  test: http/autofree_connection cleanup
  http: fix EVHTTP_CON_AUTOFREE in case of timeout (and some else)
  test: cleanup http/autofree_connection
  test: fix http/autofree_connection
  evdns: Add additional validation for values of dns options
  test: Fix test_simpleclose for Windows platform
  abi-check: abi-monitor 1.10 does not support -make -j8 (1.12 supports though)
  Add API/ABI checker (using LVC)
  Update list of cmake files for autotools dist archive
  Pass --quiet to the event_rcpgen.py (autotools already does this)
  There is typo in GetAdaptersAddresses windows library. It should be iphlpapi.dll
  Support EV_CLOSED on linux for poll(2)
  Fix EV_CLOSED detection/reporting (epoll only)
  Merge branch 'EV_CLOSED-and-EV_ET-fixes'
  bufferevent: allow setting priority on socket and openssl type
  cmake: set a default value for LIBEVENT_STATIC_LINK
  evutil_time: improve evutil_gettimeofday on Windows
  bench: Allow backend method selection
  cmake: missing test-closed binary
  Merge branch 'event_rpcgen.py-cleanup'
  cmake: replace CheckFunctionExists with CheckSymbolExists
  LibeventConfig.cmake: restore CMAKE_FIND_LIBRARY_SUFFIXES and LIBEVENT_STATIC_LINK default
  cmake: fix getaddrinfo checking error
  cmake: remove CheckFunctionExistsEx
  autoconf: fix getaddrinfo checking errors on mingw
  test-time: do not use deprecated API
  test-time: enable debug mode if EVENT_DEBUG_LOGGING_ALL env set
  increase segment refcnt only if evbuffer_add_file_segment() succeeds
  evdns: fix a crash when evdns_base with waiting requests is freed
  event_base_once: fix potential null pointer threat
  test-ratelim: add missing free
  Do not use shared global structures on CYGWIN
  test: move thread into realtime class even on EVENT__DISABLE_THREAD_SUPPORT
  test: fix compilation without thread support (EVENT__DISABLE_THREAD_SUPPORT=ON)
  test: fix bufferevent/bufferevent_connect_fail_eventcb* under osx/freebsd
  test: fix dst thread in move_pthread_to_realtime_scheduling_class (osx)
  test: fix compilation under win32 (rearrange thread_setup() code)
  test: use THREAD_* wrappers over pthread* in del_notify
  Merge branch 'osx-clock'
  cmake: do not print used method (EVENT_SHOW_METHOD) while running tests
  cmake: run regress test quietly like autotools (makes CI logs cleaner)
  Merge branch 'http-connect'
  http: do not assume body for CONNECT
  Added uninstall target check to cmakelists
  Fix compilation without OPENSSL_API_COMPAT
  evutil_time: Implements usleep() using wait funtion on Windows
  Initialize variable to 0 replace use memset function in sample/hello-world.c
  cmake: set CMAKE_{RUNTIME,LIBRARY,ARCHIVE}_OUTPUT_DIRECTORY they are not defined
  cmake: use CMAKE_LIBRARY_OUTPUT_DIRECTORY for the final shared library symlink
  test-ratelim: calculate timers bias (for slow CPUs) to avoid false-positive
  mailmap: add name/email aliases for yuangongji (name and email)
  cmake: test for find_package()
  cmake: improve package config file
  Link with iphlpapi only on windows
  Parse IPv6 scope IDs.
  Relax bufferevent_connect_hostname_emfile
  autotools: fails build when need but can not find openssl
  cmake: eliminate duplicate installation of public headers
  append to CMAKE_MODULE_PATH
  Do not use sysctl.h on linux (it had been deprecated)
  sample/https-client: link crypt32 explicitly when build with mingw-w64
  Fix compat with NetBSD >= 10
  Avoid transforming base C_FLAGS set deliberately
  tinytest: support timeout on Windows
  Merge branch 'upstream/pr/899' (evbuffer_freeze testcase enhancements)
  evbuffer_add_file: fix freeing of segment in the error path
  evutil_time: detect and use _gmtime64_s()/_gmtime64()
  http: rename bind_socket_ai() to create_bind_socket_nonblock()
  https-client: load certificates from the system cert store on Windows
  Fix checking return value of the evdns_base_resolv_conf_parse()
  cmake: fix getrandom() detection
  arc4random: replace sysctl() with getrandom (on linux)
  Upgrade autoconf (after upgrading minimum required to 2.67)
  Revert "Warn if forked from the event loop during event_reinit()"
  eliminate some C4267 warnings in Windows
  autotools: attach doxygen target into all target
  cmake: attach doxygen target into all target
  Fix memory corruption in EV_CLOSURE_EVENT_FINALIZE with debug enabled
  test: prevent duplicate event_enable_debug_mode() for TT_ENABLE_DEBUG_MODE
  test: introduce TT_ENABLE_DEBUG_MODE flag
  sample/http-server: fix parameter parsing
  sample/signal-test: fix use of uninitialized variable
  Fix typos in comments (sample/test/event-internal.h)
  sample/signal-test: add NULL checks
  Change the minimum version of automake to 1.13 and autoconf to 2.67
  Add Uninstall.cmake.in into dist archive

Fixes: 512c88ce ("ci/linux: add dist check")
(cherry picked from commit e9a6b127)

Fixes main/fork under ASAN (LSAN if to be precise)

* fix-signal-leak:
  select: requires reinit (otherwise it leaks signal handlers)
  poll: requires reinit (otherwise it leaks signal handlers)

(cherry picked from commit f6bfa8b3)

Some requests may get response (evutil_addrinfo) from gaic_server_cb,
in case of cancel_event (10000ms) will not be fast enough.

(cherry picked from commit 90bcf2d6)

UBSAN reports:
  test/regress_buffer.c:2360:2: runtime error: null pointer passed as argument 1, which is declared to never be null
  /usr/include/string.h:140:33: note: nonnull attribute specified here

(cherry picked from commit ba19b356)

(cherry picked from commit 9da1743b)

(cherry picked from commit 7b9ba3b7)

(cherry picked from commit e2f938c0)

(cherry picked from commit ce8be238)

(cherry picked from commit 9adc9f14)

With some modifications:
- drop coverage
- drop doxygen
- do not deploy ABI check, only artifacts

(cherry picked from commit 0ac3cfc0)

(cherry picked from commit ff4ec5fd)

- http/https_filter_basic
- http/https_filter_chunk_out

(cherry picked from commit ec94a6bb)

(cherry picked from commit cdbb2373)

And cannot be suppressed with suppressions due to setup routines.

(cherry picked from commit 3b13a647)

tinytest uses another way of detecting test failures, it uses pipe
between child and parent, and if the test function in child returns OK
it writes OK flag into pipe, and reads it in parent.

However sanitizers uses atexit handlers to detect leaks, and this will
not detect failures in case of exit() will be called from the atexit
handlers, fix this by checking status after waitpid().

(cherry picked from commit 6754740f)

This allows the object methods to be properly inherited and called via
`super(..)`, addressing breakage with python 2.x, introduced in
cfcc0936.

Fixes #1042.

Signed-off-by: Enji Cooper <yaneurabeya@gmail.com>
(cherry picked from commit 46c9ead0)

UBSAN reports:

  evbuffer/remove_buffer_with_empty3: ../buffer.c:1443:3: runtime error: null pointer passed as argument 2, which is declared to never be null
      #0 0x7ffff6cd0410 in evbuffer_pullup ../buffer.c:1443
      #1 0x5555556d68b9 in test_evbuffer_remove_buffer_with_empty3 ../test/regress_buffer.c:408
      #2 0x5555557b95ee in testcase_run_bare_ ../test/tinytest.c:173
      #3 0x5555557ba048 in testcase_run_one ../test/tinytest.c:333
      #4 0x5555557bc0f8 in tinytest_main ../test/tinytest.c:527
      #5 0x555555787702 in main ../test/regress_main.c:528
      #6 0x7ffff606c001 in __libc_start_main (/usr/lib/libc.so.6+0x27001)
      #7 0x55555569436d in _start (/src/le/libevent/.cmake-debug/bin/regress+0x14036d)

(cherry picked from commit a0c642ac)

Fixes:
  runtime error: null pointer passed as argument 2, which is declared to never be null
(cherry picked from commit 6f152bef)

evutil.c:2559:1: runtime error: left shift of 1 by 31 places cannot be represented in type 'int'
    #0 0x4f2be0 in EVUTIL_ISXDIGIT_ libevent/evutil.c:2559:1
    #1 0x4bd689 in regname_ok libevent/http.c:4838:7
    #2 0x4bc16b in parse_authority libevent/http.c:4958:9
    #3 0x4bb8b5 in evhttp_uri_parse_with_flags libevent/http.c:5103:7
    #4 0x4bb762 in evhttp_uri_parse libevent/http.c:5050:9
    #5 0x4b8f41 in evhttp_parse_query_impl libevent/http.c:3505:9
    #6 0x4b8ed7 in evhttp_parse_query libevent/http.c:3569:9

Bug: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=23291
Report: https://oss-fuzz.com/testcase-detail/5670743106125824
(cherry picked from commit 37dbb350)

(cherry picked from commit 4528d8e9)

In some CMake integrations, portions of the toolchain may end up
defining CMAKE_USE_PTHREADS_INIT even when EVENT__DISABLE_THREAD_SUPPORT
is set for libevent.  Modify the build to not rely on this side effect
of find_package(Threads, ...) [which could be done elsewhere] but instead
to use EVENT__HAVE_PTHREADS which is defined only on the desired codepath.

Without this change, affected builds fail as a result of event_pthreads source
files being built but with build defines which cause the build to fail.

Signed-off-by: Paul Osborne <paul.osborne@smartthings.com>
(cherry picked from commit 26d5ff45)

(cherry picked from commit 8b5a4d61)

(cherry picked from commit a9aa2b36)

- strip 1 path component
- it does not accept file name anymore, only stdin

Refs: #1029
(cherry picked from commit 89d313b1)

Refs: #1029
(cherry picked from commit 8209a623)

"--style" is invalid:

$ ./checkpatch.sh -r HEAD
usage: clang-format-diff [-h] [-i] [-p NUM] [-regex PATTERN] [-iregex PATTERN]
                         [-sort-includes] [-v] [-style STYLE] [-binary BINARY]
clang-format-diff: error: unrecognized arguments: --style={ Language:... }

(cherry picked from commit 866fbb54)