With newer clang and gcc versions (observed on clang-17.0.6 as
well as gcc 12/13), asan is throwing stack-use-after-return
during OSD startup related to usage of seastar::async, which
relies on swapcontext internally.
seastar/src/core/thread.cc supports asan's hooks, but only if
SEASTAR_HAVE_ASAN_FIBER_SUPPORT is set. seastar's CMakeList.txt
sets it based on Sanitizers_FIBER_SUPPORT, which probably should
be set by the module at src/seastar/cmake/FindSanitizers.cmake,
but that module doesn't seem to be actually invoked anywhere.
Ceph's version of that module (cmake/modules/FindSanitizers.cmake)
does not set Sanitizers_FIBER_SUPPORT.
This commit adds that check as well as the related code snippet.
Fixes: https://tracker.ceph.com/issues/64512
Signed-off-by: Samuel Just <sjust@redhat.com>
* cmake/modules/FindSanitizers.cmake: do not pollute CMAKE_REQUIRED_FLAGS
* cmake/modules/FindSanitizers.cmake: expose Sanitizers_COMPILE_OPTIONS
as a list
* CMakeLists.txt: append Sanitizers_COMPILE_OPTIONS to
*_LINKER_FLAGS after replacing ";" with " " in it.
Signed-off-by: Kefu Chai <kchai@redhat.com>
as the flags should be a string, not a list
tested using
cmake -DCMAKE_LINKER=gold -DWITH_ASAN=ON -DWITH_ASAN_LEAK=ON \
-DCMAKE_BUILD_TYPE=Debug
on ubuntu xenial
without this change, cmake will fail with following warning:
CMake Error at src/CMakeLists.txt:112 (message):
The compiler /usr/bin/c++ has no C++17 support.
-- Configuring incomplete, errors occurred!
Signed-off-by: Kefu Chai <kchai@redhat.com>
also, we don't need to pass '-lasan' or '-ltsan' to linker. it's
suggested to use the "-fsanitize=${sanitizer}".
please note, this module is compatible with the one used in seastar on
purpose, as seastar is included in ceph using add_subdirectory(), and it
in turn add its own cmake modules directory using list(APPEND ...), so
cmake/modules/FindSantitizers.cmake is prefered over
src/seastar/cmake/FindSantitizers.cmake.
Signed-off-by: Kefu Chai <kchai@redhat.com>
