libcruft-util/debug_win32.cpp

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/*
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* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* Copyright 2016 Danny Robson <danny@nerdcruft.net>
*/
#include "debug.hpp"
#include "log.hpp"
#include "win32/except.hpp"
#include "win32/windows.hpp"
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#include <iostream>
#include <winbase.h>
///////////////////////////////////////////////////////////////////////////////
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)
{
// Try to load the DrMinGW debugger if it's available.
//
// We explicitly let the resource leak as we'd like it to survive as long
// as possible.
if (nullptr == LoadLibrary("exchndl.dll")) {
auto code = GetLastError ();
LOG_WARNING("Emergency debugger not loaded, %s", cruft::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>
#include <wincon.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";
}