qassert.cpp

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// Copyright (C) 2022 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
 
#include "qassert.h"
 
#include <QtCore/qlogging.h>
 
#include <cstdlib>
#include <cstdio>
#include <exception>
#ifndef QT_NO_EXCEPTIONS
#include <new>
#endif
 
#if defined(Q_CC_MSVC)
#  include <crtdbg.h>
#endif
#ifdef Q_OS_WIN
#  include <qt_windows.h>
#endif
 
QT_BEGIN_NAMESPACE
 
void qAbort()
{
#ifdef Q_OS_WIN
    // std::abort() in the MSVC runtime will call _exit(3) if the abort
    // behavior is _WRITE_ABORT_MSG - see also _set_abort_behavior(). This is
    // the default for a debug-mode build of the runtime. Worse, MinGW's
    // std::abort() implementation (in msvcrt.dll) is basically a call to
    // _exit(3) too. Unfortunately, _exit() and _Exit() *do* run the static
    // destructors of objects in DLLs, a violation of the C++ standard (see
    // [support.start.term]). So we bypass std::abort() and directly
    // terminate the application.
 
#  if defined(Q_CC_MSVC)
    if (IsProcessorFeaturePresent(PF_FASTFAIL_AVAILABLE))
        __fastfail(FAST_FAIL_FATAL_APP_EXIT);
#  else
    RaiseFailFastException(nullptr, nullptr, 0);
#  endif
 
    // Fallback
    TerminateProcess(GetCurrentProcess(), STATUS_FATAL_APP_EXIT);
 
    // Tell the compiler the application has stopped.
    Q_UNREACHABLE_IMPL();
#else // !Q_OS_WIN
    std::abort();
#endif
}
 
/*
    The Q_ASSERT macro calls this function when the test fails.
*/
void qt_assert(const char *assertion, const char *file, int line) noexcept
{
    QMessageLogger(file, line, nullptr)
            .fatal("ASSERT: \"%s\" in file %s, line %d", assertion, file, line);
}
 
/*
    The Q_ASSERT_X macro calls this function when the test fails.
*/
void qt_assert_x(const char *where, const char *what, const char *file, int line) noexcept
{
    QMessageLogger(file, line, nullptr)
            .fatal("ASSERT failure in %s: \"%s\", file %s, line %d", where, what, file, line);
}
 
void qt_check_pointer(const char *n, int l) noexcept
{
    // make separate printing calls so that the first one may flush;
    // the second one could want to allocate memory (fputs prints a
    // newline and stderr auto-flushes).
    fputs("Out of memory", stderr);
    fprintf(stderr, "  in %s, line %d\n", n, l);
 
    std::terminate();
}
 
/*
    \internal
    Allows you to throw an exception without including <new>
    Called internally from Q_CHECK_PTR on certain OS combinations
*/
void qBadAlloc()
{
#ifndef QT_NO_EXCEPTIONS
    throw std::bad_alloc();
#else
    std::terminate();
#endif
}
 
QT_END_NAMESPACE