Minor clarification in docs.

437b247 Merge pull request ceph#32 from ceph/wip_add_void_comments
18dd014 Add documentation as to why there are empty void references.
3ddfa39 Merge pull request ceph#28 from Yan-waller/wip-waller-0710dmclockgettime
57520df Merge pull request ceph#31 from dingdangzhang/master
4cad292 delete redundant break statement
b179f3b Merge pull request ceph#29 from tchaikov/wip-cmake
76d5f35 cmake: build gtest if not found
9896fef Merge pull request ceph#30 from tchaikov/wip-move
d72fac1 do FRIEND_TEST manually
f4b155d enforce move semantics of request types
8a2ad2a replace gettimeofday() with clock_gettime() function
b84ccf9 Merge pull request ceph#27 from ceph/joelin-master-ei
34a6e25 Set compiler flags at higher level CMakeLists.txt file, so they apply to sim and test, and so earlier versions of GCC know to use c++11 standard. Clean up cmake files in general.
bad581a Move the PrCtl data structure into a separate header file that can be included where needed in the future. Also, to avoid potential naming conflicts with ceph's PrCtl.h, prefix the filename with "dmc".
1b227bf Merge pull request ceph#25 from badone/wip-test_dmclock_server-coredump
ee1866e dmclock: Don't dump core when using EXPECT_DEATH_IF_SUPPORTED

git-subtree-dir: src/dmclock
git-subtree-split: 437b247

3408cb8 Merge pull request ceph#33 from ceph/wip-move-make-options-up
f2099ec Moved the check for cmake's DO_NOT_DELAY_TAG_CALC to the top level, so it will affect how tests are built.
437b247 Merge pull request ceph#32 from ceph/wip_add_void_comments
18dd014 Add documentation as to why there are empty void references.
3ddfa39 Merge pull request ceph#28 from Yan-waller/wip-waller-0710dmclockgettime
57520df Merge pull request ceph#31 from dingdangzhang/master
4cad292 delete redundant break statement
b179f3b Merge pull request ceph#29 from tchaikov/wip-cmake
76d5f35 cmake: build gtest if not found
9896fef Merge pull request ceph#30 from tchaikov/wip-move
d72fac1 do FRIEND_TEST manually
f4b155d enforce move semantics of request types
8a2ad2a replace gettimeofday() with clock_gettime() function
b84ccf9 Merge pull request ceph#27 from ceph/joelin-master-ei
34a6e25 Set compiler flags at higher level CMakeLists.txt file, so they apply to sim and test, and so earlier versions of GCC know to use c++11 standard. Clean up cmake files in general.
bad581a Move the PrCtl data structure into a separate header file that can be included where needed in the future. Also, to avoid potential naming conflicts with ceph's PrCtl.h, prefix the filename with "dmc".
1b227bf Merge pull request ceph#25 from badone/wip-test_dmclock_server-coredump
ee1866e dmclock: Don't dump core when using EXPECT_DEATH_IF_SUPPORTED

git-subtree-dir: src/dmclock
git-subtree-split: 3408cb8

b158466 Add call for PullPriorityQueue to determine if there's a ready request.
3408cb8 Merge pull request ceph#33 from ceph/wip-move-make-options-up
f2099ec Moved the check for cmake's DO_NOT_DELAY_TAG_CALC to the top level, so it will affect how tests are built.
437b247 Merge pull request ceph#32 from ceph/wip_add_void_comments
18dd014 Add documentation as to why there are empty void references.
3ddfa39 Merge pull request ceph#28 from Yan-waller/wip-waller-0710dmclockgettime
57520df Merge pull request ceph#31 from dingdangzhang/master
4cad292 delete redundant break statement
b179f3b Merge pull request ceph#29 from tchaikov/wip-cmake
76d5f35 cmake: build gtest if not found
9896fef Merge pull request ceph#30 from tchaikov/wip-move
d72fac1 do FRIEND_TEST manually
f4b155d enforce move semantics of request types
8a2ad2a replace gettimeofday() with clock_gettime() function
b84ccf9 Merge pull request ceph#27 from ceph/joelin-master-ei
34a6e25 Set compiler flags at higher level CMakeLists.txt file, so they apply to sim and test, and so earlier versions of GCC know to use c++11 standard. Clean up cmake files in general.
bad581a Move the PrCtl data structure into a separate header file that can be included where needed in the future. Also, to avoid potential naming conflicts with ceph's PrCtl.h, prefix the filename with "dmc".
1b227bf Merge pull request ceph#25 from badone/wip-test_dmclock_server-coredump
ee1866e dmclock: Don't dump core when using EXPECT_DEATH_IF_SUPPORTED

git-subtree-dir: src/dmclock
git-subtree-split: b158466d86ad7c46ab0da4d1688822d1ff9564e7

mgr/dashboard_v2: Add table component

Update Dockerfile to Go 1.7.1 and Ceph Jewel

# This is the 1st commit message:

DO-NOT-MERGE; first commit for integration of s3-select engine into RGW; the request can only sent by AWS client ; can execute on CSV files

# This is the commit message #2:

remove debug info

# This is the commit message #3:

bug fix (aggregation) ; error handling

# This is the commit message #4:

fix comments(to be continue);

# This is the commit message #5:

placement-new allocator;cosmetics

# This is the commit message #6:

add namespace ; memory-mng: response buffer is now class-member

# This is the commit message #7:

std::list --> std::vector

# This is the commit message #8:

replace boost::split with simple C csv parser; there is a big difference ; mainly because of too many allocation & copy

# This is the commit message #9:

performance improvement; upon star-operation using reusable-buffer to reduce copies and allocations

# This is the commit message #10:

performance improvement; reduce allocations and copies; using reusable buffer(std::string) for message meta-data also

# This is the commit message #11:

replace crc implementation with boost implementation; it also improve performance;

# This is the commit message #12:

performance improvement ; reduce the number of object value construction on intensive flow ( eval() );

# This is the commit message #13:

move from char* to std::string_view; change to csv_object interfaces mainly for performance improvements

# This is the commit message #14:

initial commit for column-alias supoort; next steps are error-handling(semantic, cyclic reference) and related performance improvements

# This is the commit message #15:

adding cache to column-alias, upon refer to alias more than once, it return cache result instead of executing the referenced-sub-tree; it can improve performance significantly (alias vs non-alias)

# This is the commit message #16:

cosmitcs; aggregation semantic validation is done just after syntax phase; error-messages for failed queries;

# This is the commit message #17:

adding validation for cyclic-alias-reference (endless evaluate-loop) ; its done by validating the call-stack-deph not crossing a threshold

# This is the commit message #18:

1) seperate headers for the s3-select-functions framework; 2)bug fix for copy-constructor

# This is the commit message #19:

adding new basic-type timestamp (boost::posix_time); adding to_timestamp,add_date,diff_date,extract_date functions;

# This is the commit message #20:

adding yuvalif utcnow (return current time) implementation

# This is the commit message #21:

adding CSV parser integrated with AWS-cli, the upgraded parser is able handle null columns, dynamic column/row/escape/quote char definitions. the CSV-parser is implemented with BOOST state machine.

# This is the commit message #22:

fix comments

# This is the commit message #23:

add escape rules ; default row-delimiter

# This is the commit message #24:

*) bug fix. in case of syntax error, send error-description back to client.
*) upon amount of runtime-error is crossing 100, abort query execution with error-message.
*) compression-type value is check for "NONE"

# This is the commit message #25:

adding initial s3-select documentation

# This is the commit message #26:

*)identation

*)add table for CSV behavior

*)add alias feature decription

# This is the commit message #27:

add csv-header-info handling, use: get csv schema by first line. ignore: skip the first line.

# This is the commit message #28:

add csv-header-info feature description

# This is the commit message #29:

*) handling broken-CSV-rows is done on s3select-engine (CSV s3select reader) *) RGW is executing s3-select on io-vec instead of calling c_str (it might realloc)

# This is the commit message #30:

adding s3 select documentation(to be continue ...) , s3-select is part of radosgw top-level-link

# This is the commit message #31:

add s3select submodule (remove s3select header files from src/rgw )

# This is the commit message #32:

re shape the document; mainly user oriented ; design & architecture is out (different document) ; TBD detailed example.

rgw/sfs: update changelog with recent bugfixes

Handle idempotent and BucketAlreadyOwnedByYou

Reviewed-by: Yehuda Sadeh <yehuda@redhat.com>

When sanitizer is ON, unittest_rgw_lua shows

```
=================================================================
==3738104==ERROR: LeakSanitizer: detected memory leaks

Direct leak of 31 byte(s) in 1 object(s) allocated from:
    #0 0xaaaac100e848 in operator new(unsigned long) (/root/ceph/build/bin/unittest_rgw_lua+0x25fe848) (BuildId: 524cddb1d44130431ac70e09896af3ab7cecef82)
    #1 0xffff9356dec0 in __gnu_cxx::new_allocator<char>::allocate(unsigned long, void const*) /usr/bin/../lib/gcc/aarch64-linux-gnu/11/../../../../include/c++/11/ext/new_allocator.h:127:27
    #2 0xffff9356de3c in std::allocator<char>::allocate(unsigned long) /usr/bin/../lib/gcc/aarch64-linux-gnu/11/../../../../include/c++/11/bits/allocator.h:185:32
    #3 0xffff9356de3c in std::allocator_traits<std::allocator<char> >::allocate(std::allocator<char>&, unsigned long) /usr/bin/../lib/gcc/aarch64-linux-gnu/11/../../../../include/c++/11/bits/alloc_traits.h:464:20
    #4 0xffff9356db3c in std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::_M_create(unsigned long&, unsigned long) /usr/bin/../lib/gcc/aarch64-linux-gnu/11/../../../../include/c++/11/bits/basic_string.tcc:153:14
    #5 0xffff93570bb0 in void std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::_M_construct<char const*>(char const*, char const*, std::forward_iterator_tag) /usr/bin/../lib/gcc/aarch64-linux-gnu/11/../../../../include/c++/11/bits/basic_string.tcc:219:14
    #6 0xffff935e1bbc in void std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::_M_construct_aux<char const*>(char const*, char const*, std::__false_type) /usr/bin/../lib/gcc/aarch64-linux-gnu/11/../../../../include/c++/11/bits/basic_string.h:255:11
    ceph#7 0xffff935e197c in void std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::_M_construct<char const*>(char const*, char const*) /usr/bin/../lib/gcc/aarch64-linux-gnu/11/../../../../include/c++/11/bits/basic_string.h:274:4
    ceph#8 0xffff935da484 in std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::basic_string(char const*, unsigned long, std::allocator<char> const&) /usr/bin/../lib/gcc/aarch64-linux-gnu/11/../../../../include/c++/11/bits/basic_string.h:521:9
    ceph#9 0xffff95b3d0ac in std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > fmt::v9::to_string<char, 500ul>(fmt::v9::basic_memory_buffer<char, 500ul, std::allocator<char> > const&) /root/ceph/src/fmt/include/fmt/format.h:4050:10
    ceph#10 0xffff95b39874 in fmt::v9::vformat[abi:cxx11](fmt::v9::basic_string_view<char>, fmt::v9::basic_format_args<fmt::v9::basic_format_context<fmt::v9::appender, char> >) /root/ceph/src/fmt/include/fmt/format-inl.h:1473:10
    ceph#11 0xaaaac1264ab4 in std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > fmt::v9::format<std::basic_string_view<char, std::char_traits<char> > const&>(fmt::v9::basic_format_string<char, fmt::v9::type_identity<std::basic_string_view<char, std::char_traits<char> > const&>::type>, std::basic_string_view<char, std::char_traits<char> > const&) /root/ceph/src/fmt/include/fmt/core.h:3206:10
    ceph#12 0xaaaac1264ab4 in rgw::lua::get_iterator_name[abi:cxx11](std::basic_string_view<char, std::char_traits<char> >) /root/ceph/src/rgw/rgw_lua_utils.h:276:10
    ceph#13 0xaaaac1286864 in boost::container::flat_map<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::less<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, void>::iterator* rgw::lua::create_iterator_metadata<boost::container::flat_map<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::less<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, void> >(lua_State*, std::basic_string_view<char, std::char_traits<char> >, boost::container::flat_map<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::less<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, void>::iterator const&, boost::container::flat_map<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::less<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, void>::iterator const&) /root/ceph/src/rgw/rgw_lua_utils.h:295:38
    ceph#14 0xaaaac128603c in int rgw::lua::next<boost::container::flat_map<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::less<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, void>, void>(lua_State*) /root/ceph/src/rgw/rgw_lua_utils.h:432:15
    ceph#15 0xffff917d1e94  (/lib/aarch64-linux-gnu/liblua5.3.so.0+0x11e94) (BuildId: 3debb95525f7191c93f5ba6001de5c986b4cedfb)
    ceph#16 0xffff917d20ec  (/lib/aarch64-linux-gnu/liblua5.3.so.0+0x120ec) (BuildId: 3debb95525f7191c93f5ba6001de5c986b4cedfb)
    ceph#17 0xffff917dc32c  (/lib/aarch64-linux-gnu/liblua5.3.so.0+0x1c32c) (BuildId: 3debb95525f7191c93f5ba6001de5c986b4cedfb)
    ceph#18 0xffff917d23b8  (/lib/aarch64-linux-gnu/liblua5.3.so.0+0x123b8) (BuildId: 3debb95525f7191c93f5ba6001de5c986b4cedfb)
    ceph#19 0xffff917ca528  (/lib/aarch64-linux-gnu/liblua5.3.so.0+0xa528) (BuildId: 3debb95525f7191c93f5ba6001de5c986b4cedfb)
    ceph#20 0xffff917ccf38  (/lib/aarch64-linux-gnu/liblua5.3.so.0+0xcf38) (BuildId: 3debb95525f7191c93f5ba6001de5c986b4cedfb)
    ceph#21 0xffff917d226c in lua_pcallk (/lib/aarch64-linux-gnu/liblua5.3.so.0+0x1226c) (BuildId: 3debb95525f7191c93f5ba6001de5c986b4cedfb)
    ceph#22 0xaaaac1232a8c in rgw::lua::request::execute(rgw::sal::Driver*, RGWREST*, OpsLogSink*, req_state*, RGWOp*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&) /root/ceph/src/rgw/rgw_lua_request.cc:823:9
    ceph#23 0xaaaac1021934 in TestRGWLua_MetadataIterator_Test::TestBody() /root/ceph/src/test/rgw/test_rgw_lua.cc:628:8
    ceph#24 0xaaaac121a40c in void testing::internal::HandleSehExceptionsInMethodIfSupported<testing::Test, void>(testing::Test*, void (testing::Test::*)(), char const*) /root/ceph/src/googletest/googletest/src/gtest.cc:2605:10
    ceph#25 0xaaaac11cee0c in void testing::internal::HandleExceptionsInMethodIfSupported<testing::Test, void>(testing::Test*, void (testing::Test::*)(), char const*) /root/ceph/src/googletest/googletest/src/gtest.cc:2641:14
    ceph#26 0xaaaac1182268 in testing::Test::Run() /root/ceph/src/googletest/googletest/src/gtest.cc:2680:5
    ceph#27 0xaaaac11841ac in testing::TestInfo::Run() /root/ceph/src/googletest/googletest/src/gtest.cc:2858:11
    ceph#28 0xaaaac11857ac in testing::TestSuite::Run() /root/ceph/src/googletest/googletest/src/gtest.cc:3012:28
    ceph#29 0xaaaac11a1570 in testing::internal::UnitTestImpl::RunAllTests() /root/ceph/src/googletest/googletest/src/gtest.cc:5723:44
    ceph#30 0xaaaac1224280 in bool testing::internal::HandleSehExceptionsInMethodIfSupported<testing::internal::UnitTestImpl, bool>(testing::internal::UnitTestImpl*, bool (testing::internal::UnitTestImpl::*)(), char const*) /root/ceph/src/googletest/googletest/src/gtest.cc:2605:10
    ceph#31 0xaaaac11d593c in bool testing::internal::HandleExceptionsInMethodIfSupported<testing::internal::UnitTestImpl, bool>(testing::internal::UnitTestImpl*, bool (testing::internal::UnitTestImpl::*)(), char const*) /root/ceph/src/googletest/googletest/src/gtest.cc:2641:14

SUMMARY: AddressSanitizer: 31 byte(s) leaked in 1 allocation(s).
```

Should avoid std::string does not be freed.
https://github.com/ceph/ceph/blob/08d35a8d8529783882dd092c73c0b27be41c4d86/src/rgw/rgw_lua_utils.h#L364
style should be OK.

Signed-off-by: Rongqi Sun <sunrongqi@huawei.com>

When sanitizer is ON, unittest_rgw_lua shows

```
=================================================================
==3738104==ERROR: LeakSanitizer: detected memory leaks

Direct leak of 31 byte(s) in 1 object(s) allocated from:
    #0 0xaaaac100e848 in operator new(unsigned long) (/root/ceph/build/bin/unittest_rgw_lua+0x25fe848) (BuildId: 524cddb1d44130431ac70e09896af3ab7cecef82)
    #1 0xffff9356dec0 in __gnu_cxx::new_allocator<char>::allocate(unsigned long, void const*) /usr/bin/../lib/gcc/aarch64-linux-gnu/11/../../../../include/c++/11/ext/new_allocator.h:127:27
    #2 0xffff9356de3c in std::allocator<char>::allocate(unsigned long) /usr/bin/../lib/gcc/aarch64-linux-gnu/11/../../../../include/c++/11/bits/allocator.h:185:32
    #3 0xffff9356de3c in std::allocator_traits<std::allocator<char> >::allocate(std::allocator<char>&, unsigned long) /usr/bin/../lib/gcc/aarch64-linux-gnu/11/../../../../include/c++/11/bits/alloc_traits.h:464:20
    #4 0xffff9356db3c in std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::_M_create(unsigned long&, unsigned long) /usr/bin/../lib/gcc/aarch64-linux-gnu/11/../../../../include/c++/11/bits/basic_string.tcc:153:14
    #5 0xffff93570bb0 in void std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::_M_construct<char const*>(char const*, char const*, std::forward_iterator_tag) /usr/bin/../lib/gcc/aarch64-linux-gnu/11/../../../../include/c++/11/bits/basic_string.tcc:219:14
    #6 0xffff935e1bbc in void std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::_M_construct_aux<char const*>(char const*, char const*, std::__false_type) /usr/bin/../lib/gcc/aarch64-linux-gnu/11/../../../../include/c++/11/bits/basic_string.h:255:11
    ceph#7 0xffff935e197c in void std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::_M_construct<char const*>(char const*, char const*) /usr/bin/../lib/gcc/aarch64-linux-gnu/11/../../../../include/c++/11/bits/basic_string.h:274:4
    ceph#8 0xffff935da484 in std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::basic_string(char const*, unsigned long, std::allocator<char> const&) /usr/bin/../lib/gcc/aarch64-linux-gnu/11/../../../../include/c++/11/bits/basic_string.h:521:9
    ceph#9 0xffff95b3d0ac in std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > fmt::v9::to_string<char, 500ul>(fmt::v9::basic_memory_buffer<char, 500ul, std::allocator<char> > const&) /root/ceph/src/fmt/include/fmt/format.h:4050:10
    ceph#10 0xffff95b39874 in fmt::v9::vformat[abi:cxx11](fmt::v9::basic_string_view<char>, fmt::v9::basic_format_args<fmt::v9::basic_format_context<fmt::v9::appender, char> >) /root/ceph/src/fmt/include/fmt/format-inl.h:1473:10
    ceph#11 0xaaaac1264ab4 in std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > fmt::v9::format<std::basic_string_view<char, std::char_traits<char> > const&>(fmt::v9::basic_format_string<char, fmt::v9::type_identity<std::basic_string_view<char, std::char_traits<char> > const&>::type>, std::basic_string_view<char, std::char_traits<char> > const&) /root/ceph/src/fmt/include/fmt/core.h:3206:10
    ceph#12 0xaaaac1264ab4 in rgw::lua::get_iterator_name[abi:cxx11](std::basic_string_view<char, std::char_traits<char> >) /root/ceph/src/rgw/rgw_lua_utils.h:276:10
    ceph#13 0xaaaac1286864 in boost::container::flat_map<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::less<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, void>::iterator* rgw::lua::create_iterator_metadata<boost::container::flat_map<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::less<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, void> >(lua_State*, std::basic_string_view<char, std::char_traits<char> >, boost::container::flat_map<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::less<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, void>::iterator const&, boost::container::flat_map<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::less<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, void>::iterator const&) /root/ceph/src/rgw/rgw_lua_utils.h:295:38
    ceph#14 0xaaaac128603c in int rgw::lua::next<boost::container::flat_map<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::less<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, void>, void>(lua_State*) /root/ceph/src/rgw/rgw_lua_utils.h:432:15
    ceph#15 0xffff917d1e94  (/lib/aarch64-linux-gnu/liblua5.3.so.0+0x11e94) (BuildId: 3debb95525f7191c93f5ba6001de5c986b4cedfb)
    ceph#16 0xffff917d20ec  (/lib/aarch64-linux-gnu/liblua5.3.so.0+0x120ec) (BuildId: 3debb95525f7191c93f5ba6001de5c986b4cedfb)
    ceph#17 0xffff917dc32c  (/lib/aarch64-linux-gnu/liblua5.3.so.0+0x1c32c) (BuildId: 3debb95525f7191c93f5ba6001de5c986b4cedfb)
    ceph#18 0xffff917d23b8  (/lib/aarch64-linux-gnu/liblua5.3.so.0+0x123b8) (BuildId: 3debb95525f7191c93f5ba6001de5c986b4cedfb)
    ceph#19 0xffff917ca528  (/lib/aarch64-linux-gnu/liblua5.3.so.0+0xa528) (BuildId: 3debb95525f7191c93f5ba6001de5c986b4cedfb)
    ceph#20 0xffff917ccf38  (/lib/aarch64-linux-gnu/liblua5.3.so.0+0xcf38) (BuildId: 3debb95525f7191c93f5ba6001de5c986b4cedfb)
    ceph#21 0xffff917d226c in lua_pcallk (/lib/aarch64-linux-gnu/liblua5.3.so.0+0x1226c) (BuildId: 3debb95525f7191c93f5ba6001de5c986b4cedfb)
    ceph#22 0xaaaac1232a8c in rgw::lua::request::execute(rgw::sal::Driver*, RGWREST*, OpsLogSink*, req_state*, RGWOp*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&) /root/ceph/src/rgw/rgw_lua_request.cc:823:9
    ceph#23 0xaaaac1021934 in TestRGWLua_MetadataIterator_Test::TestBody() /root/ceph/src/test/rgw/test_rgw_lua.cc:628:8
    ceph#24 0xaaaac121a40c in void testing::internal::HandleSehExceptionsInMethodIfSupported<testing::Test, void>(testing::Test*, void (testing::Test::*)(), char const*) /root/ceph/src/googletest/googletest/src/gtest.cc:2605:10
    ceph#25 0xaaaac11cee0c in void testing::internal::HandleExceptionsInMethodIfSupported<testing::Test, void>(testing::Test*, void (testing::Test::*)(), char const*) /root/ceph/src/googletest/googletest/src/gtest.cc:2641:14
    ceph#26 0xaaaac1182268 in testing::Test::Run() /root/ceph/src/googletest/googletest/src/gtest.cc:2680:5
    ceph#27 0xaaaac11841ac in testing::TestInfo::Run() /root/ceph/src/googletest/googletest/src/gtest.cc:2858:11
    ceph#28 0xaaaac11857ac in testing::TestSuite::Run() /root/ceph/src/googletest/googletest/src/gtest.cc:3012:28
    ceph#29 0xaaaac11a1570 in testing::internal::UnitTestImpl::RunAllTests() /root/ceph/src/googletest/googletest/src/gtest.cc:5723:44
    ceph#30 0xaaaac1224280 in bool testing::internal::HandleSehExceptionsInMethodIfSupported<testing::internal::UnitTestImpl, bool>(testing::internal::UnitTestImpl*, bool (testing::internal::UnitTestImpl::*)(), char const*) /root/ceph/src/googletest/googletest/src/gtest.cc:2605:10
    ceph#31 0xaaaac11d593c in bool testing::internal::HandleExceptionsInMethodIfSupported<testing::internal::UnitTestImpl, bool>(testing::internal::UnitTestImpl*, bool (testing::internal::UnitTestImpl::*)(), char const*) /root/ceph/src/googletest/googletest/src/gtest.cc:2641:14

SUMMARY: AddressSanitizer: 31 byte(s) leaked in 1 allocation(s).
```

Should avoid std::string does not be freed.
https://github.com/ceph/ceph/blob/08d35a8d8529783882dd092c73c0b27be41c4d86/src/rgw/rgw_lua_utils.h#L364,
this way should be OK.

Reported issue: llvm/llvm-project#60709
Fix:
llvm/llvm-project@c6b12b7
(clang >= 17, but CI use clang 14)

Signed-off-by: Rongqi Sun <sunrongqi@huawei.com>

enforce move semantics of request types

When co_waiter is destroyed, the cancellation slot may still hold a
reference to the op_cancellation callback which captures 'this'. If
the cancellation signal is emitted after co_waiter is destroyed (e.g.,
during co_throttle shutdown), it results in a stack-use-after-scope
error.

Fix by:
- Adding a cancel_slot member to store the cancellation slot
- Adding a destructor that clears the slot before destruction
- Modifying get() to store the slot for later cleanup

This ensures the cancellation callback is removed before the co_waiter
object goes out of scope, preventing use-after-scope errors.

This issue was identified by ASan:

```
==21453==ERROR: AddressSanitizer: stack-use-after-scope on address 0x7a1364f050c8 at pc 0x603d79ff0d51 bp 0x7ffc1edf78c0 sp 0x7ffc1edf78b8
READ of size 1 at 0x7a1364f050c8 thread T0
    #0 0x603d79ff0d50 in std::_Optional_base_impl<boost::asio::detail::awaitable_handler<boost::asio::any_io_executor, std::__exception_ptr::exception_ptr>, std::_Optional_base<boost::asio::detail::awaitable_handler<boost::asio::any_io_executor, std::__ex
ception_ptr::exception_ptr>, false, false>>::_M_is_engaged() const /usr/lib/gcc/x86_64-linux-gnu/12/../../../../include/c++/12/optional:471:58
    #1 0x603d79ff8874 in std::optional<boost::asio::detail::awaitable_handler<boost::asio::any_io_executor, std::__exception_ptr::exception_ptr>>::operator bool() const /usr/lib/gcc/x86_64-linux-gnu/12/../../../../include/c++/12/optional:985:22
    #2 0x603d79ff9d5f in ceph::async::co_waiter<void, boost::asio::any_io_executor>::cancel() /ceph/src/common/async/co_waiter.h:153:9
    #3 0x603d79ff9c32 in ceph::async::co_waiter<void, boost::asio::any_io_executor>::op_cancellation::operator()(boost::asio::cancellation_type) /ceph/src/common/async/co_waiter.h:112:15
    #4 0x603d79ff9a6e in boost::asio::detail::cancellation_handler<ceph::async::co_waiter<void, boost::asio::any_io_executor>::op_cancellation>::call(boost::asio::cancellation_type) /opt/ceph/include/boost/asio/cancellation_signal.hpp:56:5
    #5 0x603d79fb9125 in boost::asio::cancellation_signal::emit(boost::asio::cancellation_type) /opt/ceph/include/boost/asio/cancellation_signal.hpp:99:17
    #6 0x603d79fd6c31 in boost::asio::cancellation_state::impl<boost::asio::cancellation_filter<(boost::asio::cancellation_type)1>, boost::asio::cancellation_filter<(boost::asio::cancellation_type)1>>::operator()(boost::asio::cancellation_type) /opt/ceph/include/boost/asio/cancellation_state.hpp:222:23
    #7 0x603d79fd696e in boost::asio::detail::cancellation_handler<boost::asio::cancellation_state::impl<boost::asio::cancellation_filter<(boost::asio::cancellation_type)1>, boost::asio::cancellation_filter<(boost::asio::cancellation_type)1>>>::call(boost::asio::cancellation_type) /opt/ceph/include/boost/asio/cancellation_signal.hpp:56:5
    #8 0x603d79fb9125 in boost::asio::cancellation_signal::emit(boost::asio::cancellation_type) /opt/ceph/include/boost/asio/cancellation_signal.hpp:99:17
    #9 0x603d79fee03a in boost::asio::detail::co_spawn_cancellation_handler<boost::asio::cancellation_slot_binder<ceph::async::detail::co_throttle_impl<boost::asio::any_io_executor>::child_completion, boost::asio::cancellation_slot>, boost::asio::any_io_executor, void>::operator()(boost::asio::cancellation_type) /opt/ceph/include/boost/asio/impl/co_spawn.hpp:296:13
    #10 0x603d79fede9e in boost::asio::detail::cancellation_handler<boost::asio::detail::co_spawn_cancellation_handler<boost::asio::cancellation_slot_binder<ceph::async::detail::co_throttle_impl<boost::asio::any_io_executor>::child_completion, boost::asio::cancellation_slot>, boost::asio::any_io_executor, void>>::call(boost::asio::cancellation_type) /opt/ceph/include/boost/asio/cancellation_signal.hpp:56:5
    #11 0x603d79fb9125 in boost::asio::cancellation_signal::emit(boost::asio::cancellation_type) /opt/ceph/include/boost/asio/cancellation_signal.hpp:99:17
    #12 0x603d79fe7135 in ceph::async::detail::co_throttle_impl<boost::asio::any_io_executor>::cancel() /ceph/src/common/async/detail/co_throttle_impl.h:122:17
    ceph#13 0x603d79fe701c in ceph::async::co_throttle<boost::asio::any_io_executor>::cancel() /ceph/src/common/async/co_throttle.h:110:11
    ceph#14 0x603d79fe27a8 in ceph::async::co_throttle<boost::asio::any_io_executor>::~co_throttle() /ceph/src/common/async/co_throttle.h:76:5
    ceph#15 0x603d79f98dce in ceph::async::co_throttle_spawn_shutdown_Test::TestBody()::$_0::operator()() const (.destroy) /ceph/src/test/common/test_async_co_throttle.cc:264:3
    ceph#16 0x603d79fe25ec in std::__n4861::coroutine_handle<void>::destroy() const /usr/lib/gcc/x86_64-linux-gnu/12/../../../../include/c++/12/coroutine:137:30
    ceph#17 0x603d79fe2584 in boost::asio::detail::awaitable_frame_base<boost::asio::any_io_executor>::destroy() /opt/ceph/include/boost/asio/impl/awaitable.hpp:512:11
    ceph#18 0x603d79fb79a9 in boost::asio::awaitable<void, boost::asio::any_io_executor>::~awaitable() /opt/ceph/include/boost/asio/awaitable.hpp:77:15
    ceph#19 0x603d79f7fb0a in boost::asio::awaitable<boost::asio::detail::awaitable_thread_entry_point, boost::asio::any_io_executor> boost::asio::detail::co_spawn_entry_point<ceph::async::capture(std::optional<std::__exception_ptr::exception_ptr>&)::$_0, boost::asio::any_io_executor, boost::asio::detail::awaitable_as_function<void, boost::asio::any_io_executor>>(boost::asio::awaitable<void, boost::asio::any_io_executor>*, boost::asio::detail::co_spawn_state<ceph::async::capture(std::optional<std::__exception_ptr::exception_ptr>&)::$_0, boost::asio::any_io_executor, boost::asio::detail::awaitable_as_function<void, boost::asio::any_io_executor>, void>) (.destroy) /opt/ceph/include/boost/asio/impl/co_spawn.hpp:205:5
    ceph#20 0x603d79fe25ec in std::__n4861::coroutine_handle<void>::destroy() const /usr/lib/gcc/x86_64-linux-gnu/12/../../../../include/c++/12/coroutine:137:30
    ceph#21 0x603d79fe2584 in boost::asio::detail::awaitable_frame_base<boost::asio::any_io_executor>::destroy() /opt/ceph/include/boost/asio/impl/awaitable.hpp:512:11
    ceph#22 0x603d79fd4fc9 in boost::asio::awaitable<boost::asio::detail::awaitable_thread_entry_point, boost::asio::any_io_executor>::~awaitable() /opt/ceph/include/boost/asio/awaitable.hpp:77:15
    ceph#23 0x603d79fde3d4 in boost::asio::detail::awaitable_thread<boost::asio::any_io_executor>::~awaitable_thread()::'lambda'()::~() /opt/ceph/include/boost/asio/impl/awaitable.hpp:692:11
    ceph#24 0x603d79fdf034 in boost::asio::detail::binder0<boost::asio::detail::awaitable_thread<boost::asio::any_io_executor>::~awaitable_thread()::'lambda'()>::~binder0() /opt/ceph/include/boost/asio/detail/bind_handler.hpp:30:7
    ceph#25 0x603d79fe0501 in void boost::asio::detail::executor_function::complete<boost::asio::detail::binder0<boost::asio::detail::awaitable_thread<boost::asio::any_io_executor>::~awaitable_thread()::'lambda'()>, std::allocator<void>>(boost::asio::detail::executor_function::impl_base*, bool) /opt/ceph/include/boost/asio/detail/executor_function.hpp:115:3
    ceph#26 0x603d79fdc152 in boost::asio::detail::executor_function::~executor_function() /opt/ceph/include/boost/asio/detail/executor_function.hpp:52:7
    ceph#27 0x603d79ffcea8 in boost::asio::detail::executor_op<boost::asio::detail::executor_function, std::allocator<void>, boost::asio::detail::scheduler_operation>::do_complete(void*, boost::asio::detail::scheduler_operation*, boost::system::error_code const&, unsigned long) /opt/ceph/include/boost/asio/detail/executor_op.hpp:73:3
    ceph#28 0x603d79fce17c in boost::asio::detail::scheduler_operation::destroy() /opt/ceph/include/boost/asio/detail/scheduler_operation.hpp:45:5
    ceph#29 0x603d79fd0380 in boost::asio::detail::scheduler::shutdown() /opt/ceph/include/boost/asio/detail/impl/scheduler.ipp:174:10
    ceph#30 0x603d79fd483c in boost::asio::detail::service_registry::shutdown_services() /opt/ceph/include/boost/asio/detail/impl/service_registry.ipp:44:14
    ceph#31 0x603d79fd4735 in boost::asio::execution_context::shutdown() /opt/ceph/include/boost/asio/impl/execution_context.ipp:48:22
    ceph#32 0x603d79fb8c08 in boost::asio::io_context::~io_context() /opt/ceph/include/boost/asio/impl/io_context.ipp:65:3
    ceph#33 0x603d79f4a284 in ceph::async::co_throttle_spawn_shutdown_Test::TestBody() /ceph/src/test/common/test_async_co_throttle.cc:274:1
    ceph#34 0x603d7a0fdd8d in void testing::internal::HandleSehExceptionsInMethodIfSupported<testing::Test, void>(testing::Test*, void (testing::Test::*)(), char const*) /ceph/src/googletest/googletest/src/gtest.cc:2653:10
    ceph#35 0x603d7a0b49e5 in void testing::internal::HandleExceptionsInMethodIfSupported<testing::Test, void>(testing::Test*, void (testing::Test::*)(), char const*) /ceph/src/googletest/googletest/src/gtest.cc:2689:14
    ceph#36 0x603d7a06f0bd in testing::Test::Run() /ceph/src/googletest/googletest/src/gtest.cc:2728:5
```

Fixes: https://tracker.ceph.com/issues/75231
Signed-off-by: Kefu Chai <k.chai@proxmox.com>

When co_waiter is destroyed, the cancellation slot may still hold a
reference to the op_cancellation callback which captures 'this'. If
the cancellation signal is emitted after co_waiter is destroyed (e.g.,
during co_throttle shutdown), it results in a stack-use-after-scope
error.

Fix by:
- Adding a cancel_slot member to store the cancellation slot
- Adding a destructor that clears the slot before destruction
- Modifying get() to store the slot for later cleanup

This ensures the cancellation callback is removed before the co_waiter
object goes out of scope, preventing use-after-scope errors.

This issue was identified by ASan:

```
==21453==ERROR: AddressSanitizer: stack-use-after-scope on address 0x7a1364f050c8 at pc 0x603d79ff0d51 bp 0x7ffc1edf78c0 sp 0x7ffc1edf78b8
READ of size 1 at 0x7a1364f050c8 thread T0
    #0 0x603d79ff0d50 in std::_Optional_base_impl<boost::asio::detail::awaitable_handler<boost::asio::any_io_executor, std::__exception_ptr::exception_ptr>, std::_Optional_base<boost::asio::detail::awaitable_handler<boost::asio::any_io_executor, std::__ex
ception_ptr::exception_ptr>, false, false>>::_M_is_engaged() const /usr/lib/gcc/x86_64-linux-gnu/12/../../../../include/c++/12/optional:471:58
    #1 0x603d79ff8874 in std::optional<boost::asio::detail::awaitable_handler<boost::asio::any_io_executor, std::__exception_ptr::exception_ptr>>::operator bool() const /usr/lib/gcc/x86_64-linux-gnu/12/../../../../include/c++/12/optional:985:22
    #2 0x603d79ff9d5f in ceph::async::co_waiter<void, boost::asio::any_io_executor>::cancel() /ceph/src/common/async/co_waiter.h:153:9
    #3 0x603d79ff9c32 in ceph::async::co_waiter<void, boost::asio::any_io_executor>::op_cancellation::operator()(boost::asio::cancellation_type) /ceph/src/common/async/co_waiter.h:112:15
    #4 0x603d79ff9a6e in boost::asio::detail::cancellation_handler<ceph::async::co_waiter<void, boost::asio::any_io_executor>::op_cancellation>::call(boost::asio::cancellation_type) /opt/ceph/include/boost/asio/cancellation_signal.hpp:56:5
    #5 0x603d79fb9125 in boost::asio::cancellation_signal::emit(boost::asio::cancellation_type) /opt/ceph/include/boost/asio/cancellation_signal.hpp:99:17
    #6 0x603d79fd6c31 in boost::asio::cancellation_state::impl<boost::asio::cancellation_filter<(boost::asio::cancellation_type)1>, boost::asio::cancellation_filter<(boost::asio::cancellation_type)1>>::operator()(boost::asio::cancellation_type) /opt/ceph/include/boost/asio/cancellation_state.hpp:222:23
    #7 0x603d79fd696e in boost::asio::detail::cancellation_handler<boost::asio::cancellation_state::impl<boost::asio::cancellation_filter<(boost::asio::cancellation_type)1>, boost::asio::cancellation_filter<(boost::asio::cancellation_type)1>>>::call(boost::asio::cancellation_type) /opt/ceph/include/boost/asio/cancellation_signal.hpp:56:5
    #8 0x603d79fb9125 in boost::asio::cancellation_signal::emit(boost::asio::cancellation_type) /opt/ceph/include/boost/asio/cancellation_signal.hpp:99:17
    #9 0x603d79fee03a in boost::asio::detail::co_spawn_cancellation_handler<boost::asio::cancellation_slot_binder<ceph::async::detail::co_throttle_impl<boost::asio::any_io_executor>::child_completion, boost::asio::cancellation_slot>, boost::asio::any_io_executor, void>::operator()(boost::asio::cancellation_type) /opt/ceph/include/boost/asio/impl/co_spawn.hpp:296:13
    #10 0x603d79fede9e in boost::asio::detail::cancellation_handler<boost::asio::detail::co_spawn_cancellation_handler<boost::asio::cancellation_slot_binder<ceph::async::detail::co_throttle_impl<boost::asio::any_io_executor>::child_completion, boost::asio::cancellation_slot>, boost::asio::any_io_executor, void>>::call(boost::asio::cancellation_type) /opt/ceph/include/boost/asio/cancellation_signal.hpp:56:5
    #11 0x603d79fb9125 in boost::asio::cancellation_signal::emit(boost::asio::cancellation_type) /opt/ceph/include/boost/asio/cancellation_signal.hpp:99:17
    #12 0x603d79fe7135 in ceph::async::detail::co_throttle_impl<boost::asio::any_io_executor>::cancel() /ceph/src/common/async/detail/co_throttle_impl.h:122:17
    ceph#13 0x603d79fe701c in ceph::async::co_throttle<boost::asio::any_io_executor>::cancel() /ceph/src/common/async/co_throttle.h:110:11
    ceph#14 0x603d79fe27a8 in ceph::async::co_throttle<boost::asio::any_io_executor>::~co_throttle() /ceph/src/common/async/co_throttle.h:76:5
    ceph#15 0x603d79f98dce in ceph::async::co_throttle_spawn_shutdown_Test::TestBody()::$_0::operator()() const (.destroy) /ceph/src/test/common/test_async_co_throttle.cc:264:3
    ceph#16 0x603d79fe25ec in std::__n4861::coroutine_handle<void>::destroy() const /usr/lib/gcc/x86_64-linux-gnu/12/../../../../include/c++/12/coroutine:137:30
    ceph#17 0x603d79fe2584 in boost::asio::detail::awaitable_frame_base<boost::asio::any_io_executor>::destroy() /opt/ceph/include/boost/asio/impl/awaitable.hpp:512:11
    ceph#18 0x603d79fb79a9 in boost::asio::awaitable<void, boost::asio::any_io_executor>::~awaitable() /opt/ceph/include/boost/asio/awaitable.hpp:77:15
    ceph#19 0x603d79f7fb0a in boost::asio::awaitable<boost::asio::detail::awaitable_thread_entry_point, boost::asio::any_io_executor> boost::asio::detail::co_spawn_entry_point<ceph::async::capture(std::optional<std::__exception_ptr::exception_ptr>&)::$_0, boost::asio::any_io_executor, boost::asio::detail::awaitable_as_function<void, boost::asio::any_io_executor>>(boost::asio::awaitable<void, boost::asio::any_io_executor>*, boost::asio::detail::co_spawn_state<ceph::async::capture(std::optional<std::__exception_ptr::exception_ptr>&)::$_0, boost::asio::any_io_executor, boost::asio::detail::awaitable_as_function<void, boost::asio::any_io_executor>, void>) (.destroy) /opt/ceph/include/boost/asio/impl/co_spawn.hpp:205:5
    ceph#20 0x603d79fe25ec in std::__n4861::coroutine_handle<void>::destroy() const /usr/lib/gcc/x86_64-linux-gnu/12/../../../../include/c++/12/coroutine:137:30
    ceph#21 0x603d79fe2584 in boost::asio::detail::awaitable_frame_base<boost::asio::any_io_executor>::destroy() /opt/ceph/include/boost/asio/impl/awaitable.hpp:512:11
    ceph#22 0x603d79fd4fc9 in boost::asio::awaitable<boost::asio::detail::awaitable_thread_entry_point, boost::asio::any_io_executor>::~awaitable() /opt/ceph/include/boost/asio/awaitable.hpp:77:15
    ceph#23 0x603d79fde3d4 in boost::asio::detail::awaitable_thread<boost::asio::any_io_executor>::~awaitable_thread()::'lambda'()::~() /opt/ceph/include/boost/asio/impl/awaitable.hpp:692:11
    ceph#24 0x603d79fdf034 in boost::asio::detail::binder0<boost::asio::detail::awaitable_thread<boost::asio::any_io_executor>::~awaitable_thread()::'lambda'()>::~binder0() /opt/ceph/include/boost/asio/detail/bind_handler.hpp:30:7
    ceph#25 0x603d79fe0501 in void boost::asio::detail::executor_function::complete<boost::asio::detail::binder0<boost::asio::detail::awaitable_thread<boost::asio::any_io_executor>::~awaitable_thread()::'lambda'()>, std::allocator<void>>(boost::asio::detail::executor_function::impl_base*, bool) /opt/ceph/include/boost/asio/detail/executor_function.hpp:115:3
    ceph#26 0x603d79fdc152 in boost::asio::detail::executor_function::~executor_function() /opt/ceph/include/boost/asio/detail/executor_function.hpp:52:7
    ceph#27 0x603d79ffcea8 in boost::asio::detail::executor_op<boost::asio::detail::executor_function, std::allocator<void>, boost::asio::detail::scheduler_operation>::do_complete(void*, boost::asio::detail::scheduler_operation*, boost::system::error_code const&, unsigned long) /opt/ceph/include/boost/asio/detail/executor_op.hpp:73:3
    ceph#28 0x603d79fce17c in boost::asio::detail::scheduler_operation::destroy() /opt/ceph/include/boost/asio/detail/scheduler_operation.hpp:45:5
    ceph#29 0x603d79fd0380 in boost::asio::detail::scheduler::shutdown() /opt/ceph/include/boost/asio/detail/impl/scheduler.ipp:174:10
    ceph#30 0x603d79fd483c in boost::asio::detail::service_registry::shutdown_services() /opt/ceph/include/boost/asio/detail/impl/service_registry.ipp:44:14
    ceph#31 0x603d79fd4735 in boost::asio::execution_context::shutdown() /opt/ceph/include/boost/asio/impl/execution_context.ipp:48:22
    ceph#32 0x603d79fb8c08 in boost::asio::io_context::~io_context() /opt/ceph/include/boost/asio/impl/io_context.ipp:65:3
    ceph#33 0x603d79f4a284 in ceph::async::co_throttle_spawn_shutdown_Test::TestBody() /ceph/src/test/common/test_async_co_throttle.cc:274:1
    ceph#34 0x603d7a0fdd8d in void testing::internal::HandleSehExceptionsInMethodIfSupported<testing::Test, void>(testing::Test*, void (testing::Test::*)(), char const*) /ceph/src/googletest/googletest/src/gtest.cc:2653:10
    ceph#35 0x603d7a0b49e5 in void testing::internal::HandleExceptionsInMethodIfSupported<testing::Test, void>(testing::Test*, void (testing::Test::*)(), char const*) /ceph/src/googletest/googletest/src/gtest.cc:2689:14
    ceph#36 0x603d7a06f0bd in testing::Test::Run() /ceph/src/googletest/googletest/src/gtest.cc:2728:5
```
`

Signed-off-by: Kefu Chai <k.chai@proxmox.com>

rbd_features_from_string() uses boost::lexical_cast which throws
bad_lexical_cast when the input is not numeric. The exception is caught
and handled as "parse as feature name list instead".

This is normal control flow, but when ASAN's __cxa_throw interceptor is
misconfigured (e.g. with intercept_cxx_exceptions=0 leaving real___cxa_throw
NULL), any exception causes a CHECK failure. Even with a correctly configured
ASAN, throwing exceptions during config initialization adds overhead.

Replace the try/catch pattern with boost::conversion::try_lexical_convert,
which returns false on parse failure instead of throwing. This eliminates
the exception entirely, making the code more efficient and avoiding any
interaction with ASAN's exception interceptor.

The ASan report:

```
AddressSanitizer: CHECK failed: asan_interceptors.cpp:320 "((__interception::real___cxa_throw)) != (0)" (0x0, 0x0) (tid=30529)
    #0 0x7d668fac9a09 in CheckUnwind ../../../../src/libsanitizer/asan/asan_rtl.cpp:67
    #1 0x7d668faec105 in __sanitizer::CheckFailed(char const*, int, char const*, unsigned long long, unsigned long long) ../../../../src/libsanitizer/sanitizer_common/sanitizer_termination.cpp:86
    #2 0x7d668fa4b194 in __interceptor___cxa_throw ../../../../src/libsanitizer/asan/asan_interceptors.cpp:320
    #3 0x7d668ae4ec0f in void boost::throw_exception<boost::bad_lexical_cast>(boost::bad_lexical_cast const&) /opt/ceph/include/boost/throw_exception.hpp:165
    #4 0x7d668c1e1e0b in void boost::conversion::detail::throw_bad_cast<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, unsigned long>() /opt/ceph/include/boost/lexical_cast/bad_lexical_cast.hpp:93
    #5 0x7d668c1e0e05 in unsigned long boost::lexical_cast<unsigned long, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&) /opt/ceph/include/boost/lexical_cast.hpp:43
    #6 0x7d668c1df609 in librbd::rbd_features_from_string(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, std::ostream*) /ceph/src/librbd/Features.cc:67
    #7 0x7d668b255a35 in get_rbd_options()::$_2::operator()(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*) const src/common/options/rbd_options.cc:44
    #8 0x7d668b255806 in int std::__invoke_impl<int, get_rbd_options()::$_2&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*>(std::__invoke_other, get_rbd_options()::$_2&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*&&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*&&) /usr/lib/gcc/x86_64-linux-gnu/12/../../../../include/c++/12/bits/invoke.h:61
    #9 0x7d668b255754 in std::enable_if<is_invocable_r_v<int, get_rbd_options()::$_2&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*>, int>::type std::__invoke_r<int, get_rbd_options()::$_2&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*>(get_rbd_options()::$_2&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*&&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*&&) /usr/lib/gcc/x86_64-linux-gnu/12/../../../../include/c++/12/bits/invoke.h:114
    #10 0x7d668b25563c in std::_Function_handler<int (std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*), get_rbd_options()::$_2>::_M_invoke(std::_Any_data const&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*&&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*&&) /usr/lib/gcc/x86_64-linux-gnu/12/../../../../include/c++/12/bits/std_function.h:290
    #11 0x7d668af924f1 in std::function<int (std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*)>::operator()(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*) const /usr/lib/gcc/x86_64-linux-gnu/12/../../../../include/c++/12/bits/std_function.h:591
    #12 0x7d668af8c495 in Option::pre_validate(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*) const /ceph/src/common/options.cc:94
    ceph#13 0x7d668aef9ec3 in md_config_t::md_config_t(ConfigValues&, ConfigTracker const&, bool) /ceph/src/common/config.cc:208
    ceph#14 0x7d668ae0040d in ceph::common::ConfigProxy::ConfigProxy(bool) /ceph/src/common/config_proxy.h:70
    ceph#15 0x7d668adf3f5d in ceph::common::CephContext::CephContext(unsigned int, ceph::common::CephContext::create_options const&) /ceph/src/common/ceph_context.cc:730
    ceph#16 0x7d668adf3785 in ceph::common::CephContext::CephContext(unsigned int, code_environment_t, int) /ceph/src/common/ceph_context.cc:724
    ceph#17 0x7d668aef5ee6 in common_preinit(CephInitParameters const&, code_environment_t, int) /ceph/src/common/common_init.cc:40
    ceph#18 0x7d668d4a47af in rados_create_cct(char const*, CephInitParameters*) /ceph/src/librados/librados_c.cc:120
    ceph#19 0x7d668d4a49db in _rados_create2 /ceph/src/librados/librados_c.cc:168
    ceph#20 0x7d668d94dc4b in __pyx_pf_5rados_5Rados_2__setup /ceph/build/src/pybind/rados/rados_processed.c:13219
    ceph#21 0x7d668d94dc4b in __pyx_pw_5rados_5Rados_3__setup /ceph/build/src/pybind/rados/rados_processed.c:12703
    ceph#22 0x7d668d94a347 in __Pyx_CyFunction_CallAsMethod /ceph/build/src/pybind/rados/rados_processed.c:93157
    ceph#23 0x58ac5086d0ba in _PyObject_MakeTpCall (/usr/bin/python3.10+0x1810ba)
    ceph#24 0x58ac508843da  (/usr/bin/python3.10+0x1983da)
    ceph#25 0x58ac50885076 in PyVectorcall_Call (/usr/bin/python3.10+0x199076)
    ceph#26 0x7d668d94cdd7 in __Pyx_PyObject_Call /ceph/build/src/pybind/rados/rados_processed.c:90994
    ceph#27 0x7d668d94cdd7 in __pyx_pf_5rados_5Rados___init__ /ceph/build/src/pybind/rados/rados_processed.c:12474
    ceph#28 0x7d668d94cdd7 in __pyx_pw_5rados_5Rados_1__init__ /ceph/build/src/pybind/rados/rados_processed.c:12443
    ceph#29 0x58ac5086d43a  (/usr/bin/python3.10+0x18143a)
    ceph#30 0x58ac50884d3a in PyObject_Call (/usr/bin/python3.10+0x198d3a)
    ceph#31 0x58ac508637de in _PyEval_EvalFrameDefault (/usr/bin/python3.10+0x1777de)
    ceph#32 0x58ac5087702b in _PyFunction_Vectorcall (/usr/bin/python3.10+0x18b02b)
    ceph#33 0x58ac508615fe in _PyEval_EvalFrameDefault (/usr/bin/python3.10+0x1755fe)
    ceph#34 0x58ac5087702b in _PyFunction_Vectorcall (/usr/bin/python3.10+0x18b02b)
    ceph#35 0x58ac508615fe in _PyEval_EvalFrameDefault (/usr/bin/python3.10+0x1755fe)
```

Signed-off-by: Kefu Chai <k.chai@proxmox.com>

rbd_features_from_string() uses boost::lexical_cast which throws
bad_lexical_cast when the input is not numeric. The exception is caught
and handled as "parse as feature name list instead".

This is normal control flow, but when ASAN's __cxa_throw interceptor is
misconfigured (e.g. with intercept_cxx_exceptions=0 leaving real___cxa_throw
NULL), any exception causes a CHECK failure. Even with a correctly configured
ASAN, throwing exceptions during config initialization adds overhead.

Replace the try/catch pattern with boost::conversion::try_lexical_convert,
which returns false on parse failure instead of throwing. This eliminates
the exception entirely, making the code more efficient and avoiding any
interaction with ASAN's exception interceptor.

The ASan report:

```
AddressSanitizer: CHECK failed: asan_interceptors.cpp:320 "((__interception::real___cxa_throw)) != (0)" (0x0, 0x0) (tid=30529)
    #0 0x7d668fac9a09 in CheckUnwind ../../../../src/libsanitizer/asan/asan_rtl.cpp:67
    #1 0x7d668faec105 in __sanitizer::CheckFailed(char const*, int, char const*, unsigned long long, unsigned long long) ../../../../src/libsanitizer/sanitizer_common/sanitizer_termination.cpp:86
    #2 0x7d668fa4b194 in __interceptor___cxa_throw ../../../../src/libsanitizer/asan/asan_interceptors.cpp:320
    #3 0x7d668ae4ec0f in void boost::throw_exception<boost::bad_lexical_cast>(boost::bad_lexical_cast const&) /opt/ceph/include/boost/throw_exception.hpp:165
    #4 0x7d668c1e1e0b in void boost::conversion::detail::throw_bad_cast<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, unsigned long>() /opt/ceph/include/boost/lexical_cast/bad_lexical_cast.hpp:93
    #5 0x7d668c1e0e05 in unsigned long boost::lexical_cast<unsigned long, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&) /opt/ceph/include/boost/lexical_cast.hpp:43
    #6 0x7d668c1df609 in librbd::rbd_features_from_string(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, std::ostream*) /ceph/src/librbd/Features.cc:67
    #7 0x7d668b255a35 in get_rbd_options()::$_2::operator()(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*) const src/common/options/rbd_options.cc:44
    #8 0x7d668b255806 in int std::__invoke_impl<int, get_rbd_options()::$_2&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*>(std::__invoke_other, get_rbd_options()::$_2&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*&&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*&&) /usr/lib/gcc/x86_64-linux-gnu/12/../../../../include/c++/12/bits/invoke.h:61
    #9 0x7d668b255754 in std::enable_if<is_invocable_r_v<int, get_rbd_options()::$_2&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*>, int>::type std::__invoke_r<int, get_rbd_options()::$_2&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*>(get_rbd_options()::$_2&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*&&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*&&) /usr/lib/gcc/x86_64-linux-gnu/12/../../../../include/c++/12/bits/invoke.h:114
    #10 0x7d668b25563c in std::_Function_handler<int (std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*), get_rbd_options()::$_2>::_M_invoke(std::_Any_data const&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*&&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*&&) /usr/lib/gcc/x86_64-linux-gnu/12/../../../../include/c++/12/bits/std_function.h:290
    #11 0x7d668af924f1 in std::function<int (std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*)>::operator()(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*) const /usr/lib/gcc/x86_64-linux-gnu/12/../../../../include/c++/12/bits/std_function.h:591
    #12 0x7d668af8c495 in Option::pre_validate(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*) const /ceph/src/common/options.cc:94
    ceph#13 0x7d668aef9ec3 in md_config_t::md_config_t(ConfigValues&, ConfigTracker const&, bool) /ceph/src/common/config.cc:208
    ceph#14 0x7d668ae0040d in ceph::common::ConfigProxy::ConfigProxy(bool) /ceph/src/common/config_proxy.h:70
    ceph#15 0x7d668adf3f5d in ceph::common::CephContext::CephContext(unsigned int, ceph::common::CephContext::create_options const&) /ceph/src/common/ceph_context.cc:730
    ceph#16 0x7d668adf3785 in ceph::common::CephContext::CephContext(unsigned int, code_environment_t, int) /ceph/src/common/ceph_context.cc:724
    ceph#17 0x7d668aef5ee6 in common_preinit(CephInitParameters const&, code_environment_t, int) /ceph/src/common/common_init.cc:40
    ceph#18 0x7d668d4a47af in rados_create_cct(char const*, CephInitParameters*) /ceph/src/librados/librados_c.cc:120
    ceph#19 0x7d668d4a49db in _rados_create2 /ceph/src/librados/librados_c.cc:168
    ceph#20 0x7d668d94dc4b in __pyx_pf_5rados_5Rados_2__setup /ceph/build/src/pybind/rados/rados_processed.c:13219
    ceph#21 0x7d668d94dc4b in __pyx_pw_5rados_5Rados_3__setup /ceph/build/src/pybind/rados/rados_processed.c:12703
    ceph#22 0x7d668d94a347 in __Pyx_CyFunction_CallAsMethod /ceph/build/src/pybind/rados/rados_processed.c:93157
    ceph#23 0x58ac5086d0ba in _PyObject_MakeTpCall (/usr/bin/python3.10+0x1810ba)
    ceph#24 0x58ac508843da  (/usr/bin/python3.10+0x1983da)
    ceph#25 0x58ac50885076 in PyVectorcall_Call (/usr/bin/python3.10+0x199076)
    ceph#26 0x7d668d94cdd7 in __Pyx_PyObject_Call /ceph/build/src/pybind/rados/rados_processed.c:90994
    ceph#27 0x7d668d94cdd7 in __pyx_pf_5rados_5Rados___init__ /ceph/build/src/pybind/rados/rados_processed.c:12474
    ceph#28 0x7d668d94cdd7 in __pyx_pw_5rados_5Rados_1__init__ /ceph/build/src/pybind/rados/rados_processed.c:12443
    ceph#29 0x58ac5086d43a  (/usr/bin/python3.10+0x18143a)
    ceph#30 0x58ac50884d3a in PyObject_Call (/usr/bin/python3.10+0x198d3a)
    ceph#31 0x58ac508637de in _PyEval_EvalFrameDefault (/usr/bin/python3.10+0x1777de)
    ceph#32 0x58ac5087702b in _PyFunction_Vectorcall (/usr/bin/python3.10+0x18b02b)
    ceph#33 0x58ac508615fe in _PyEval_EvalFrameDefault (/usr/bin/python3.10+0x1755fe)
    ceph#34 0x58ac5087702b in _PyFunction_Vectorcall (/usr/bin/python3.10+0x18b02b)
    ceph#35 0x58ac508615fe in _PyEval_EvalFrameDefault (/usr/bin/python3.10+0x1755fe)
```

Signed-off-by: Kefu Chai <k.chai@proxmox.com>

rbd_features_from_string() uses boost::lexical_cast which throws
bad_lexical_cast when the input is not numeric. The exception is caught
and handled as "parse as feature name list instead".

This is normal control flow, but when ASAN's __cxa_throw interceptor is
misconfigured (e.g. with intercept_cxx_exceptions=0 leaving real___cxa_throw
NULL), any exception causes a CHECK failure. Even with a correctly configured
ASAN, throwing exceptions during config initialization adds overhead.

Replace the try/catch pattern with boost::conversion::try_lexical_convert,
which returns false on parse failure instead of throwing. This eliminates
the exception entirely, making the code more efficient and avoiding any
interaction with ASAN's exception interceptor.

The ASan report:

```
AddressSanitizer: CHECK failed: asan_interceptors.cpp:320 "((__interception::real___cxa_throw)) != (0)" (0x0, 0x0) (tid=30529)
    #0 0x7d668fac9a09 in CheckUnwind ../../../../src/libsanitizer/asan/asan_rtl.cpp:67
    #1 0x7d668faec105 in __sanitizer::CheckFailed(char const*, int, char const*, unsigned long long, unsigned long long) ../../../../src/libsanitizer/sanitizer_common/sanitizer_termination.cpp:86
    #2 0x7d668fa4b194 in __interceptor___cxa_throw ../../../../src/libsanitizer/asan/asan_interceptors.cpp:320
    #3 0x7d668ae4ec0f in void boost::throw_exception<boost::bad_lexical_cast>(boost::bad_lexical_cast const&) /opt/ceph/include/boost/throw_exception.hpp:165
    #4 0x7d668c1e1e0b in void boost::conversion::detail::throw_bad_cast<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, unsigned long>() /opt/ceph/include/boost/lexical_cast/bad_lexical_cast.hpp:93
    #5 0x7d668c1e0e05 in unsigned long boost::lexical_cast<unsigned long, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&) /opt/ceph/include/boost/lexical_cast.hpp:43
    #6 0x7d668c1df609 in librbd::rbd_features_from_string(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, std::ostream*) /ceph/src/librbd/Features.cc:67
    #7 0x7d668b255a35 in get_rbd_options()::$_2::operator()(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*) const src/common/options/rbd_options.cc:44
    #8 0x7d668b255806 in int std::__invoke_impl<int, get_rbd_options()::$_2&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*>(std::__invoke_other, get_rbd_options()::$_2&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*&&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*&&) /usr/lib/gcc/x86_64-linux-gnu/12/../../../../include/c++/12/bits/invoke.h:61
    #9 0x7d668b255754 in std::enable_if<is_invocable_r_v<int, get_rbd_options()::$_2&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*>, int>::type std::__invoke_r<int, get_rbd_options()::$_2&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*>(get_rbd_options()::$_2&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*&&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*&&) /usr/lib/gcc/x86_64-linux-gnu/12/../../../../include/c++/12/bits/invoke.h:114
    #10 0x7d668b25563c in std::_Function_handler<int (std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*), get_rbd_options()::$_2>::_M_invoke(std::_Any_data const&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*&&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*&&) /usr/lib/gcc/x86_64-linux-gnu/12/../../../../include/c++/12/bits/std_function.h:290
    #11 0x7d668af924f1 in std::function<int (std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*)>::operator()(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*) const /usr/lib/gcc/x86_64-linux-gnu/12/../../../../include/c++/12/bits/std_function.h:591
    #12 0x7d668af8c495 in Option::pre_validate(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*) const /ceph/src/common/options.cc:94
    ceph#13 0x7d668aef9ec3 in md_config_t::md_config_t(ConfigValues&, ConfigTracker const&, bool) /ceph/src/common/config.cc:208
    ceph#14 0x7d668ae0040d in ceph::common::ConfigProxy::ConfigProxy(bool) /ceph/src/common/config_proxy.h:70
    ceph#15 0x7d668adf3f5d in ceph::common::CephContext::CephContext(unsigned int, ceph::common::CephContext::create_options const&) /ceph/src/common/ceph_context.cc:730
    ceph#16 0x7d668adf3785 in ceph::common::CephContext::CephContext(unsigned int, code_environment_t, int) /ceph/src/common/ceph_context.cc:724
    ceph#17 0x7d668aef5ee6 in common_preinit(CephInitParameters const&, code_environment_t, int) /ceph/src/common/common_init.cc:40
    ceph#18 0x7d668d4a47af in rados_create_cct(char const*, CephInitParameters*) /ceph/src/librados/librados_c.cc:120
    ceph#19 0x7d668d4a49db in _rados_create2 /ceph/src/librados/librados_c.cc:168
    ceph#20 0x7d668d94dc4b in __pyx_pf_5rados_5Rados_2__setup /ceph/build/src/pybind/rados/rados_processed.c:13219
    ceph#21 0x7d668d94dc4b in __pyx_pw_5rados_5Rados_3__setup /ceph/build/src/pybind/rados/rados_processed.c:12703
    ceph#22 0x7d668d94a347 in __Pyx_CyFunction_CallAsMethod /ceph/build/src/pybind/rados/rados_processed.c:93157
    ceph#23 0x58ac5086d0ba in _PyObject_MakeTpCall (/usr/bin/python3.10+0x1810ba)
    ceph#24 0x58ac508843da  (/usr/bin/python3.10+0x1983da)
    ceph#25 0x58ac50885076 in PyVectorcall_Call (/usr/bin/python3.10+0x199076)
    ceph#26 0x7d668d94cdd7 in __Pyx_PyObject_Call /ceph/build/src/pybind/rados/rados_processed.c:90994
    ceph#27 0x7d668d94cdd7 in __pyx_pf_5rados_5Rados___init__ /ceph/build/src/pybind/rados/rados_processed.c:12474
    ceph#28 0x7d668d94cdd7 in __pyx_pw_5rados_5Rados_1__init__ /ceph/build/src/pybind/rados/rados_processed.c:12443
    ceph#29 0x58ac5086d43a  (/usr/bin/python3.10+0x18143a)
    ceph#30 0x58ac50884d3a in PyObject_Call (/usr/bin/python3.10+0x198d3a)
    ceph#31 0x58ac508637de in _PyEval_EvalFrameDefault (/usr/bin/python3.10+0x1777de)
    ceph#32 0x58ac5087702b in _PyFunction_Vectorcall (/usr/bin/python3.10+0x18b02b)
    ceph#33 0x58ac508615fe in _PyEval_EvalFrameDefault (/usr/bin/python3.10+0x1755fe)
    ceph#34 0x58ac5087702b in _PyFunction_Vectorcall (/usr/bin/python3.10+0x18b02b)
    ceph#35 0x58ac508615fe in _PyEval_EvalFrameDefault (/usr/bin/python3.10+0x1755fe)
```

Signed-off-by: Kefu Chai <k.chai@proxmox.com>

rbd_features_from_string() uses boost::lexical_cast which throws
bad_lexical_cast when the input is not numeric. The exception is caught
and handled as "parse as feature name list instead".

This is normal control flow, but when ASAN's __cxa_throw interceptor is
misconfigured (e.g. with intercept_cxx_exceptions=0 leaving real___cxa_throw
NULL), any exception causes a CHECK failure. Even with a correctly configured
ASAN, throwing exceptions during config initialization adds overhead.

Replace the try/catch pattern with boost::conversion::try_lexical_convert,
which returns false on parse failure instead of throwing. This eliminates
the exception entirely, making the code more efficient and avoiding any
interaction with ASAN's exception interceptor.

The ASan report:

```
AddressSanitizer: CHECK failed: asan_interceptors.cpp:320 "((__interception::real___cxa_throw)) != (0)" (0x0, 0x0) (tid=30529)
    #0 0x7d668fac9a09 in CheckUnwind ../../../../src/libsanitizer/asan/asan_rtl.cpp:67
    #1 0x7d668faec105 in __sanitizer::CheckFailed(char const*, int, char const*, unsigned long long, unsigned long long) ../../../../src/libsanitizer/sanitizer_common/sanitizer_termination.cpp:86
    #2 0x7d668fa4b194 in __interceptor___cxa_throw ../../../../src/libsanitizer/asan/asan_interceptors.cpp:320
    #3 0x7d668ae4ec0f in void boost::throw_exception<boost::bad_lexical_cast>(boost::bad_lexical_cast const&) /opt/ceph/include/boost/throw_exception.hpp:165
    #4 0x7d668c1e1e0b in void boost::conversion::detail::throw_bad_cast<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, unsigned long>() /opt/ceph/include/boost/lexical_cast/bad_lexical_cast.hpp:93
    #5 0x7d668c1e0e05 in unsigned long boost::lexical_cast<unsigned long, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&) /opt/ceph/include/boost/lexical_cast.hpp:43
    #6 0x7d668c1df609 in librbd::rbd_features_from_string(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, std::ostream*) /ceph/src/librbd/Features.cc:67
    #7 0x7d668b255a35 in get_rbd_options()::$_2::operator()(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*) const src/common/options/rbd_options.cc:44
    #8 0x7d668b255806 in int std::__invoke_impl<int, get_rbd_options()::$_2&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*>(std::__invoke_other, get_rbd_options()::$_2&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*&&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*&&) /usr/lib/gcc/x86_64-linux-gnu/12/../../../../include/c++/12/bits/invoke.h:61
    #9 0x7d668b255754 in std::enable_if<is_invocable_r_v<int, get_rbd_options()::$_2&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*>, int>::type std::__invoke_r<int, get_rbd_options()::$_2&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*>(get_rbd_options()::$_2&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*&&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*&&) /usr/lib/gcc/x86_64-linux-gnu/12/../../../../include/c++/12/bits/invoke.h:114
    #10 0x7d668b25563c in std::_Function_handler<int (std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*), get_rbd_options()::$_2>::_M_invoke(std::_Any_data const&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*&&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*&&) /usr/lib/gcc/x86_64-linux-gnu/12/../../../../include/c++/12/bits/std_function.h:290
    #11 0x7d668af924f1 in std::function<int (std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*)>::operator()(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*) const /usr/lib/gcc/x86_64-linux-gnu/12/../../../../include/c++/12/bits/std_function.h:591
    #12 0x7d668af8c495 in Option::pre_validate(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*) const /ceph/src/common/options.cc:94
    ceph#13 0x7d668aef9ec3 in md_config_t::md_config_t(ConfigValues&, ConfigTracker const&, bool) /ceph/src/common/config.cc:208
    ceph#14 0x7d668ae0040d in ceph::common::ConfigProxy::ConfigProxy(bool) /ceph/src/common/config_proxy.h:70
    ceph#15 0x7d668adf3f5d in ceph::common::CephContext::CephContext(unsigned int, ceph::common::CephContext::create_options const&) /ceph/src/common/ceph_context.cc:730
    ceph#16 0x7d668adf3785 in ceph::common::CephContext::CephContext(unsigned int, code_environment_t, int) /ceph/src/common/ceph_context.cc:724
    ceph#17 0x7d668aef5ee6 in common_preinit(CephInitParameters const&, code_environment_t, int) /ceph/src/common/common_init.cc:40
    ceph#18 0x7d668d4a47af in rados_create_cct(char const*, CephInitParameters*) /ceph/src/librados/librados_c.cc:120
    ceph#19 0x7d668d4a49db in _rados_create2 /ceph/src/librados/librados_c.cc:168
    ceph#20 0x7d668d94dc4b in __pyx_pf_5rados_5Rados_2__setup /ceph/build/src/pybind/rados/rados_processed.c:13219
    ceph#21 0x7d668d94dc4b in __pyx_pw_5rados_5Rados_3__setup /ceph/build/src/pybind/rados/rados_processed.c:12703
    ceph#22 0x7d668d94a347 in __Pyx_CyFunction_CallAsMethod /ceph/build/src/pybind/rados/rados_processed.c:93157
    ceph#23 0x58ac5086d0ba in _PyObject_MakeTpCall (/usr/bin/python3.10+0x1810ba)
    ceph#24 0x58ac508843da  (/usr/bin/python3.10+0x1983da)
    ceph#25 0x58ac50885076 in PyVectorcall_Call (/usr/bin/python3.10+0x199076)
    ceph#26 0x7d668d94cdd7 in __Pyx_PyObject_Call /ceph/build/src/pybind/rados/rados_processed.c:90994
    ceph#27 0x7d668d94cdd7 in __pyx_pf_5rados_5Rados___init__ /ceph/build/src/pybind/rados/rados_processed.c:12474
    ceph#28 0x7d668d94cdd7 in __pyx_pw_5rados_5Rados_1__init__ /ceph/build/src/pybind/rados/rados_processed.c:12443
    ceph#29 0x58ac5086d43a  (/usr/bin/python3.10+0x18143a)
    ceph#30 0x58ac50884d3a in PyObject_Call (/usr/bin/python3.10+0x198d3a)
    ceph#31 0x58ac508637de in _PyEval_EvalFrameDefault (/usr/bin/python3.10+0x1777de)
    ceph#32 0x58ac5087702b in _PyFunction_Vectorcall (/usr/bin/python3.10+0x18b02b)
    ceph#33 0x58ac508615fe in _PyEval_EvalFrameDefault (/usr/bin/python3.10+0x1755fe)
    ceph#34 0x58ac5087702b in _PyFunction_Vectorcall (/usr/bin/python3.10+0x18b02b)
    ceph#35 0x58ac508615fe in _PyEval_EvalFrameDefault (/usr/bin/python3.10+0x1755fe)
```

Signed-off-by: Kefu Chai <k.chai@proxmox.com>

rbd_features_from_string() uses boost::lexical_cast which throws
bad_lexical_cast when the input is not numeric. The exception is caught
and handled as "parse as feature name list instead".

This is normal control flow, but when ASAN's __cxa_throw interceptor is
misconfigured (e.g. with intercept_cxx_exceptions=0 leaving real___cxa_throw
NULL), any exception causes a CHECK failure. Even with a correctly configured
ASAN, throwing exceptions during config initialization adds overhead.

Replace the try/catch pattern with boost::conversion::try_lexical_convert,
which returns false on parse failure instead of throwing. This eliminates
the exception entirely, making the code more efficient and avoiding any
interaction with ASAN's exception interceptor.

The ASan report:

```
AddressSanitizer: CHECK failed: asan_interceptors.cpp:320 "((__interception::real___cxa_throw)) != (0)" (0x0, 0x0) (tid=30529)
    #0 0x7d668fac9a09 in CheckUnwind ../../../../src/libsanitizer/asan/asan_rtl.cpp:67
    #1 0x7d668faec105 in __sanitizer::CheckFailed(char const*, int, char const*, unsigned long long, unsigned long long) ../../../../src/libsanitizer/sanitizer_common/sanitizer_termination.cpp:86
    #2 0x7d668fa4b194 in __interceptor___cxa_throw ../../../../src/libsanitizer/asan/asan_interceptors.cpp:320
    #3 0x7d668ae4ec0f in void boost::throw_exception<boost::bad_lexical_cast>(boost::bad_lexical_cast const&) /opt/ceph/include/boost/throw_exception.hpp:165
    #4 0x7d668c1e1e0b in void boost::conversion::detail::throw_bad_cast<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, unsigned long>() /opt/ceph/include/boost/lexical_cast/bad_lexical_cast.hpp:93
    #5 0x7d668c1e0e05 in unsigned long boost::lexical_cast<unsigned long, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&) /opt/ceph/include/boost/lexical_cast.hpp:43
    #6 0x7d668c1df609 in librbd::rbd_features_from_string(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, std::ostream*) /ceph/src/librbd/Features.cc:67
    #7 0x7d668b255a35 in get_rbd_options()::$_2::operator()(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*) const src/common/options/rbd_options.cc:44
    #8 0x7d668b255806 in int std::__invoke_impl<int, get_rbd_options()::$_2&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*>(std::__invoke_other, get_rbd_options()::$_2&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*&&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*&&) /usr/lib/gcc/x86_64-linux-gnu/12/../../../../include/c++/12/bits/invoke.h:61
    #9 0x7d668b255754 in std::enable_if<is_invocable_r_v<int, get_rbd_options()::$_2&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*>, int>::type std::__invoke_r<int, get_rbd_options()::$_2&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*>(get_rbd_options()::$_2&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*&&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*&&) /usr/lib/gcc/x86_64-linux-gnu/12/../../../../include/c++/12/bits/invoke.h:114
    #10 0x7d668b25563c in std::_Function_handler<int (std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*), get_rbd_options()::$_2>::_M_invoke(std::_Any_data const&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*&&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*&&) /usr/lib/gcc/x86_64-linux-gnu/12/../../../../include/c++/12/bits/std_function.h:290
    #11 0x7d668af924f1 in std::function<int (std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*)>::operator()(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*) const /usr/lib/gcc/x86_64-linux-gnu/12/../../../../include/c++/12/bits/std_function.h:591
    #12 0x7d668af8c495 in Option::pre_validate(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*) const /ceph/src/common/options.cc:94
    ceph#13 0x7d668aef9ec3 in md_config_t::md_config_t(ConfigValues&, ConfigTracker const&, bool) /ceph/src/common/config.cc:208
    ceph#14 0x7d668ae0040d in ceph::common::ConfigProxy::ConfigProxy(bool) /ceph/src/common/config_proxy.h:70
    ceph#15 0x7d668adf3f5d in ceph::common::CephContext::CephContext(unsigned int, ceph::common::CephContext::create_options const&) /ceph/src/common/ceph_context.cc:730
    ceph#16 0x7d668adf3785 in ceph::common::CephContext::CephContext(unsigned int, code_environment_t, int) /ceph/src/common/ceph_context.cc:724
    ceph#17 0x7d668aef5ee6 in common_preinit(CephInitParameters const&, code_environment_t, int) /ceph/src/common/common_init.cc:40
    ceph#18 0x7d668d4a47af in rados_create_cct(char const*, CephInitParameters*) /ceph/src/librados/librados_c.cc:120
    ceph#19 0x7d668d4a49db in _rados_create2 /ceph/src/librados/librados_c.cc:168
    ceph#20 0x7d668d94dc4b in __pyx_pf_5rados_5Rados_2__setup /ceph/build/src/pybind/rados/rados_processed.c:13219
    ceph#21 0x7d668d94dc4b in __pyx_pw_5rados_5Rados_3__setup /ceph/build/src/pybind/rados/rados_processed.c:12703
    ceph#22 0x7d668d94a347 in __Pyx_CyFunction_CallAsMethod /ceph/build/src/pybind/rados/rados_processed.c:93157
    ceph#23 0x58ac5086d0ba in _PyObject_MakeTpCall (/usr/bin/python3.10+0x1810ba)
    ceph#24 0x58ac508843da  (/usr/bin/python3.10+0x1983da)
    ceph#25 0x58ac50885076 in PyVectorcall_Call (/usr/bin/python3.10+0x199076)
    ceph#26 0x7d668d94cdd7 in __Pyx_PyObject_Call /ceph/build/src/pybind/rados/rados_processed.c:90994
    ceph#27 0x7d668d94cdd7 in __pyx_pf_5rados_5Rados___init__ /ceph/build/src/pybind/rados/rados_processed.c:12474
    ceph#28 0x7d668d94cdd7 in __pyx_pw_5rados_5Rados_1__init__ /ceph/build/src/pybind/rados/rados_processed.c:12443
    ceph#29 0x58ac5086d43a  (/usr/bin/python3.10+0x18143a)
    ceph#30 0x58ac50884d3a in PyObject_Call (/usr/bin/python3.10+0x198d3a)
    ceph#31 0x58ac508637de in _PyEval_EvalFrameDefault (/usr/bin/python3.10+0x1777de)
    ceph#32 0x58ac5087702b in _PyFunction_Vectorcall (/usr/bin/python3.10+0x18b02b)
    ceph#33 0x58ac508615fe in _PyEval_EvalFrameDefault (/usr/bin/python3.10+0x1755fe)
    ceph#34 0x58ac5087702b in _PyFunction_Vectorcall (/usr/bin/python3.10+0x18b02b)
    ceph#35 0x58ac508615fe in _PyEval_EvalFrameDefault (/usr/bin/python3.10+0x1755fe)
```

Signed-off-by: Kefu Chai <k.chai@proxmox.com>