libcruft-util/debug_win32.cpp

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/*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* Copyright 2016 Danny Robson <danny@nerdcruft.net>
*/
#include "debug.hpp"
#include "except.hpp"
#include "log.hpp"
#include "except.hpp"
#include "win32/error.hpp"
#include <windows.h>
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#include <iostream>
///////////////////////////////////////////////////////////////////////////////
void
breakpoint (void)
{
DebugBreak ();
}
///////////////////////////////////////////////////////////////////////////////
void
await_debugger (void)
{
// HACK: This is terribly inefficient, but it's not a performance
// priority for the time being.
while (!IsDebuggerPresent ())
Sleep (100);
}
//-----------------------------------------------------------------------------
void
prepare_debugger (void)
{
if (nullptr == LoadLibrary("exchndl.dll")) {
auto code = GetLastError ();
LOG_WARNING("Emergency debugger not loaded: %s", util::win32::error::code_string (code));
}
}
////////////////////////////////////////////////////////////////////////////////
void
enable_fpe (void)
{
LOG_WARN ("Non-Linux exception code is broken under current GCC.");
// _clearfp();
// unsigned int ignored;
// _controlfp_s (&ignored, _MCW_EM, _MCW_EM);
}
//-----------------------------------------------------------------------------
void
disable_fpe (void)
{
LOG_WARN ("Non-Linux exception code is broken under current GCC.");
// _clearfp();
// unsigned int ignored;
// _controlfp_s (&ignored, 0, _MCW_EM);
}
///////////////////////////////////////////////////////////////////////////////
#include <io.h>
#include <fcntl.h>
void
force_console (void)
{
if (!AttachConsole (ATTACH_PARENT_PROCESS))
return;
auto out_handle = GetStdHandle (STD_OUTPUT_HANDLE);
auto err_handle = GetStdHandle (STD_ERROR_HANDLE);
auto in_handle = GetStdHandle (STD_INPUT_HANDLE);
auto out_fd = _open_osfhandle (reinterpret_cast<intptr_t> (out_handle), _O_TEXT);
auto err_fd = _open_osfhandle (reinterpret_cast<intptr_t> (err_handle), _O_TEXT);
auto in_fd = _open_osfhandle (reinterpret_cast<intptr_t> (in_handle), _O_TEXT);
auto out_file = _fdopen (out_fd, "w");
auto err_file = _fdopen (err_fd, "w");
auto in_file = _fdopen (in_fd, "r");
/// FILE objects are not reassignable, but Windows doesn't leave us much
/// choice here.
*stdout = *out_file;
*stderr = *err_file;
*stdin = *in_file;
setvbuf (stdout, NULL, _IONBF, 0);
setvbuf (stderr, NULL, _IONBF, 0);
setvbuf (stdin, NULL, _IONBF, 0);
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std::ios::sync_with_stdio ();
// Windows doesn't give an immediate newline when an application is run
// from a console, so we provide one here for sanity.
std::cout << "\n";
std::cerr << "Console installed\n";
}