OVMS3-idf/components/cxx/cxx_exception_stubs.cpp

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#include <cstdlib>
#include <cstdio>
#include <exception>
#include <bits/functexcept.h>
#include <sdkconfig.h>
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#ifndef CONFIG_COMPILER_CXX_EXCEPTIONS
const char *FATAL_EXCEPTION = "Fatal C++ exception: ";
extern "C" void __cxx_fatal_exception(void)
{
abort();
}
extern "C" bool __cxx_fatal_exception_bool(void)
{
__cxx_fatal_exception();
return false;
}
extern "C" void __cxx_fatal_exception_message(const char *msg)
{
printf("%s%s\n", FATAL_EXCEPTION, msg);
abort();
}
extern "C" void __cxx_fatal_exception_message_va(const char *msg, ...)
{
__cxx_fatal_exception_message(msg);
}
extern "C" void __cxx_fatal_exception_int(int i)
{
printf("%s (%d)\n", FATAL_EXCEPTION, i);
abort();
}
/* 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.
This cause exception handler code to be emitted in the library even though it's mostly
unreachable (as any libstdc++ "throw" will first call one of the above stubs, which will abort).
If these are left out, a bunch of unwanted exception handler code is linked.
Note: these function prototypes are not correct.
*/
extern "C" void __cxa_allocate_exception(void) __attribute__((alias("__cxx_fatal_exception")));
extern "C" void __cxa_allocate_dependent_exception(void) __attribute__((alias("__cxx_fatal_exception")));
extern "C" void __cxa_begin_catch(void) __attribute__((alias("__cxx_fatal_exception")));
extern "C" void __cxa_end_catch(void) __attribute__((alias("__cxx_fatal_exception")));
extern "C" void __cxa_get_exception_ptr(void) __attribute__((alias("__cxx_fatal_exception")));
extern "C" void __cxa_free_exception(void) __attribute__((alias("__cxx_fatal_exception")));
extern "C" void __cxa_free_dependent_exception(void) __attribute__((alias("__cxx_fatal_exception")));
extern "C" void __cxa_rethrow(void) __attribute__((alias("__cxx_fatal_exception")));
extern "C" void __cxa_throw(void) __attribute__((alias("__cxx_fatal_exception")));
extern "C" void __cxa_call_terminate(void) __attribute__((alias("__cxx_fatal_exception")));
bool std::uncaught_exception() __attribute__((alias("__cxx_fatal_exception_bool")));
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#endif // CONFIG_COMPILER_CXX_EXCEPTIONS