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cxx: don’t define stubs for __throw_* functions

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If exception support is disabled in IDF, and libstdc++ tries to throw
an exception, it will call __cxa_allocate_exception which is replaced
with abort in IDF.

We have a dramatically size reduction of the RO-section in binary when using '__throw_'-stubs in GCC5
In the case of using GCC8, we are faced with 'multiple definition' errors when using '__throw_'-stubs.
Good that we don't have the size problem due to gcc8
This commit is contained in:
Alexey Gerenkov 2018-08-28 12:22:12 +08:00 committed by Anton Maklakov
parent 43116e6e2d
commit e0f7e196f2
1 changed files with 2 additions and 18 deletions
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20
components/cxx/cxx_exception_stubs.cpp
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@ -36,42 +36,26 @@ extern "C" void __cxx_fatal_exception_int(int i)
abort();
}
#if !GCC_NOT_5_2_0
void std::__throw_bad_exception(void) __attribute__((alias("__cxx_fatal_exception")));
void std::__throw_bad_alloc(void) __attribute__((alias("__cxx_fatal_exception")));
void std::__throw_bad_cast(void) __attribute__((alias("__cxx_fatal_exception")));
void std::__throw_bad_typeid(void) __attribute__((alias("__cxx_fatal_exception")));
void std::__throw_logic_error(const char*) __attribute__((alias("__cxx_fatal_exception_message")));
void std::__throw_domain_error(const char*) __attribute__((alias("__cxx_fatal_exception_message")));
void std::__throw_invalid_argument(const char*) __attribute__((alias("__cxx_fatal_exception_message")));
void std::__throw_length_error(const char*) __attribute__((alias("__cxx_fatal_exception_message")));
void std::__throw_out_of_range(const char*) __attribute__((alias("__cxx_fatal_exception_message")));
void std::__throw_out_of_range_fmt(const char*, ...) __attribute__((alias("__cxx_fatal_exception_message_va")));
void std::__throw_runtime_error(const char*) __attribute__((alias("__cxx_fatal_exception_message")));
void std::__throw_range_error(const char*) __attribute__((alias("__cxx_fatal_exception_message")));
void std::__throw_overflow_error(const char*) __attribute__((alias("__cxx_fatal_exception_message")));
void std::__throw_underflow_error(const char*) __attribute__((alias("__cxx_fatal_exception_message")));
void std::__throw_ios_failure(const char*) __attribute__((alias("__cxx_fatal_exception_message")));
void std::__throw_system_error(int) __attribute__((alias("__cxx_fatal_exception_int")));
void std::__throw_bad_function_call(void) __attribute__((alias("__cxx_fatal_exception")));
void std::__throw_future_error(int) __attribute__((alias("__cxx_fatal_exception_int")));
#endif
/* The following definitions are needed because libstdc++ is also compiled with
__throw_exception_again defined to throw, and some other exception code in a few places.