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test: py: LD_PRELOAD the C++ standard library when using ASan

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When the ASan runtime is linked using --as-needed, its dependency on the
C++ standard library is stripped. This results to a failure to properly
handled exceptions when a C++ dynamically loaded .so is used, as in the
Python unit tests that load the libcamera Python module:

AddressSanitizer: CHECK failed: asan_interceptors.cpp:335 "((__interception::real___cxa_throw)) != (0)" (0x0, 0x0) (tid=32679)
    #0 0x7fa2f32e6c19 in CheckUnwind /var/tmp/portage/sys-devel/gcc-13.3.1_p20241025/work/gcc-13-20241025/libsanitizer/asan/asan_rtl.cpp:69
    #1 0x7fa2f330c9fd in __sanitizer::CheckFailed(char const*, int, char const*, unsigned long long, unsigned long long) /var/tmp/portage/sys-devel/gcc-13.3.1_p20241025/work/gcc-13-20241025/libsanitizer/sanitizer_common/sanitizer_termination.cpp:86
    #2 0x7fa2f3247824 in __interceptor___cxa_throw /var/tmp/portage/sys-devel/gcc-13.3.1_p20241025/work/gcc-13-20241025/libsanitizer/asan/asan_interceptors.cpp:335
    #3 0x7fa2f3247824 in __interceptor___cxa_throw /var/tmp/portage/sys-devel/gcc-13.3.1_p20241025/work/gcc-13-20241025/libsanitizer/asan/asan_interceptors.cpp:334
    #4 0x7fa2efb6da8b in operator() ../../src/py/libcamera/py_main.cpp:157
[...]

The issue has been reported in [1] and so far remains unfixed. Work
around it by preloading the C++ standard library.

[1] https://github.com/google/sanitizers/issues/934

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
This commit is contained in:
Laurent Pinchart 2024-11-05 02:16:32 +02:00
parent b3eba17213
commit f326eb4bf2
2 changed files with 9 additions and 0 deletions
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3
meson.build
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@ -112,6 +112,8 @@ common_arguments = [
c_arguments = [] c_arguments = []
cpp_arguments = [] cpp_arguments = []
cxx_stdlib = 'libstdc++'
if cc.get_id() == 'clang' if cc.get_id() == 'clang'
if cc.version().version_compare('<9') if cc.version().version_compare('<9')
error('clang version is too old, libcamera requires 9.0 or newer') error('clang version is too old, libcamera requires 9.0 or newer')
@ -137,6 +139,7 @@ if cc.get_id() == 'clang'
cpp_arguments += [ cpp_arguments += [
'-stdlib=libc++', '-stdlib=libc++',
] ]
cxx_stdlib = 'libc++'
endif endif
cpp_arguments += [ cpp_arguments += [

6
test/py/meson.build
View file

@ -24,6 +24,12 @@ py_env.append('PYTHONPATH', pypathdir)
if asan_enabled if asan_enabled
py_env.append('LD_PRELOAD', asan_runtime) py_env.append('LD_PRELOAD', asan_runtime)
# Preload the C++ standard library to work around a bug in ASan when
# dynamically loading C++ .so modules.
stdlib = run_command(cxx, '-print-file-name=' + cxx_stdlib + '.so',
check : true).stdout().strip()
py_env.append('LD_PRELOAD', stdlib)
# Disable leak detection as the Python interpreter is full of leaks. # Disable leak detection as the Python interpreter is full of leaks.
py_env.append('ASAN_OPTIONS', 'detect_leaks=0') py_env.append('ASAN_OPTIONS', 'detect_leaks=0')
endif endif