forked from OSchip/llvm-project
123 lines
4.4 KiB
C++
123 lines
4.4 KiB
C++
//===------------------------- cxa_default_handlers.cpp -------------------===//
|
|
//
|
|
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
|
|
// See https://llvm.org/LICENSE.txt for license information.
|
|
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
|
//
|
|
//
|
|
// This file implements the default terminate_handler and unexpected_handler.
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include <stdexcept>
|
|
#include <new>
|
|
#include <exception>
|
|
#include <cstdlib>
|
|
#include "abort_message.h"
|
|
#include "cxxabi.h"
|
|
#include "cxa_handlers.hpp"
|
|
#include "cxa_exception.hpp"
|
|
#include "private_typeinfo.h"
|
|
#include "include/atomic_support.h"
|
|
|
|
#if !defined(LIBCXXABI_SILENT_TERMINATE)
|
|
static const char* cause = "uncaught";
|
|
|
|
__attribute__((noreturn))
|
|
static void demangling_terminate_handler()
|
|
{
|
|
// If there might be an uncaught exception
|
|
using namespace __cxxabiv1;
|
|
__cxa_eh_globals* globals = __cxa_get_globals_fast();
|
|
if (globals)
|
|
{
|
|
__cxa_exception* exception_header = globals->caughtExceptions;
|
|
// If there is an uncaught exception
|
|
if (exception_header)
|
|
{
|
|
_Unwind_Exception* unwind_exception =
|
|
reinterpret_cast<_Unwind_Exception*>(exception_header + 1) - 1;
|
|
if (__isOurExceptionClass(unwind_exception))
|
|
{
|
|
void* thrown_object =
|
|
__getExceptionClass(unwind_exception) == kOurDependentExceptionClass ?
|
|
((__cxa_dependent_exception*)exception_header)->primaryException :
|
|
exception_header + 1;
|
|
const __shim_type_info* thrown_type =
|
|
static_cast<const __shim_type_info*>(exception_header->exceptionType);
|
|
// Try to get demangled name of thrown_type
|
|
int status;
|
|
char buf[1024];
|
|
size_t len = sizeof(buf);
|
|
const char* name = __cxa_demangle(thrown_type->name(), buf, &len, &status);
|
|
if (status != 0)
|
|
name = thrown_type->name();
|
|
// If the uncaught exception can be caught with std::exception&
|
|
const __shim_type_info* catch_type =
|
|
static_cast<const __shim_type_info*>(&typeid(std::exception));
|
|
if (catch_type->can_catch(thrown_type, thrown_object))
|
|
{
|
|
// Include the what() message from the exception
|
|
const std::exception* e = static_cast<const std::exception*>(thrown_object);
|
|
abort_message("terminating with %s exception of type %s: %s",
|
|
cause, name, e->what());
|
|
}
|
|
else
|
|
// Else just note that we're terminating with an exception
|
|
abort_message("terminating with %s exception of type %s",
|
|
cause, name);
|
|
}
|
|
else
|
|
// Else we're terminating with a foreign exception
|
|
abort_message("terminating with %s foreign exception", cause);
|
|
}
|
|
}
|
|
// Else just note that we're terminating
|
|
abort_message("terminating");
|
|
}
|
|
|
|
__attribute__((noreturn))
|
|
static void demangling_unexpected_handler()
|
|
{
|
|
cause = "unexpected";
|
|
std::terminate();
|
|
}
|
|
|
|
static std::terminate_handler default_terminate_handler = demangling_terminate_handler;
|
|
static std::terminate_handler default_unexpected_handler = demangling_unexpected_handler;
|
|
#else
|
|
static std::terminate_handler default_terminate_handler = std::abort;
|
|
static std::terminate_handler default_unexpected_handler = std::terminate;
|
|
#endif
|
|
|
|
//
|
|
// Global variables that hold the pointers to the current handler
|
|
//
|
|
_LIBCXXABI_DATA_VIS
|
|
std::terminate_handler __cxa_terminate_handler = default_terminate_handler;
|
|
|
|
_LIBCXXABI_DATA_VIS
|
|
std::unexpected_handler __cxa_unexpected_handler = default_unexpected_handler;
|
|
|
|
namespace std
|
|
{
|
|
|
|
unexpected_handler
|
|
set_unexpected(unexpected_handler func) _NOEXCEPT
|
|
{
|
|
if (func == 0)
|
|
func = default_unexpected_handler;
|
|
return __libcpp_atomic_exchange(&__cxa_unexpected_handler, func,
|
|
_AO_Acq_Rel);
|
|
}
|
|
|
|
terminate_handler
|
|
set_terminate(terminate_handler func) _NOEXCEPT
|
|
{
|
|
if (func == 0)
|
|
func = default_terminate_handler;
|
|
return __libcpp_atomic_exchange(&__cxa_terminate_handler, func,
|
|
_AO_Acq_Rel);
|
|
}
|
|
|
|
}
|