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Bug fix: Replace bare static exception<T> with gil_safe_call_once_and_store. (#4897)

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This is to ensure that `Py_DECREF()` is not called after the Python interpreter was finalized already:

3414c56b6c/include/pybind11/gil_safe_call_once.h (L19)
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Ralf W. Grosse-Kunstleve 2023-10-23 12:51:04 -07:00 committed by GitHub
parent 3414c56b6c
commit bf88e29c95
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1 changed files with 6 additions and 14 deletions
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20
include/pybind11/pybind11.h
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@ -14,6 +14,7 @@
#include "detail/init.h" #include "detail/init.h"
#include "attr.h" #include "attr.h"
#include "gil.h" #include "gil.h"
#include "gil_safe_call_once.h"
#include "options.h" #include "options.h"
#include "typing.h" #include "typing.h"
@ -2609,23 +2610,14 @@ public:
}; };
PYBIND11_NAMESPACE_BEGIN(detail) PYBIND11_NAMESPACE_BEGIN(detail)
// Returns a reference to a function-local static exception object used in the simple
// register_exception approach below. (It would be simpler to have the static local variable
// directly in register_exception, but that makes clang <3.5 segfault - issue #1349).
template <typename CppException>
exception<CppException> &get_exception_object() {
static exception<CppException> ex;
return ex;
}
// Helper function for register_exception and register_local_exception // Helper function for register_exception and register_local_exception
template <typename CppException> template <typename CppException>
exception<CppException> & exception<CppException> &
register_exception_impl(handle scope, const char *name, handle base, bool isLocal) { register_exception_impl(handle scope, const char *name, handle base, bool isLocal) {
auto &ex = detail::get_exception_object<CppException>(); PYBIND11_CONSTINIT static gil_safe_call_once_and_store<exception<CppException>> exc_storage;
if (!ex) { exc_storage.call_once_and_store_result(
ex = exception<CppException>(scope, name, base); [&]() { return exception<CppException>(scope, name, base); });
}
auto register_func auto register_func
= isLocal ? &register_local_exception_translator : &register_exception_translator; = isLocal ? &register_local_exception_translator : &register_exception_translator;
@ -2637,10 +2629,10 @@ register_exception_impl(handle scope, const char *name, handle base, bool isLoca
try { try {
std::rethrow_exception(p); std::rethrow_exception(p);
} catch (const CppException &e) { } catch (const CppException &e) {
set_error(detail::get_exception_object<CppException>(), e.what()); set_error(exc_storage.get_stored(), e.what());
} }
}); });
return ex; return exc_storage.get_stored();
} }
PYBIND11_NAMESPACE_END(detail) PYBIND11_NAMESPACE_END(detail)