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/****************************************************************************
**
** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of Qt Creator.
**
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia. For licensing terms and
** conditions see http://www.qt.io/licensing. For further information
** use the contact form at http://www.qt.io/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 or version 3 as published by the Free
** Software Foundation and appearing in the file LICENSE.LGPLv21 and
** LICENSE.LGPLv3 included in the packaging of this file. Please review the
** following information to ensure the GNU Lesser General Public License
** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Digia gives you certain additional
** rights. These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
****************************************************************************/
#include "procinterrupt.h"
#include "debuggerconstants.h"
#include <QCoreApplication>
#include <QDir>
#include <QProcess> // makes kill visible on Windows.
using namespace Debugger::Internal;
static inline QString msgCannotInterrupt(int pid, const QString &why)
{
return QString::fromLatin1("Cannot interrupt process %1: %2").arg(pid).arg(why);
}
#if defined(Q_OS_WIN)
#undef _WIN32_WINNT
#define _WIN32_WINNT 0x0501 /* WinXP, needed for DebugBreakProcess() */
#include <utils/winutils.h>
#include <windows.h>
#if !defined(PROCESS_SUSPEND_RESUME) // Check flag for MinGW
# define PROCESS_SUSPEND_RESUME (0x0800)
#endif // PROCESS_SUSPEND_RESUME
static BOOL isWow64Process(HANDLE hproc)
{
typedef BOOL (WINAPI *LPFN_ISWOW64PROCESS) (HANDLE, PBOOL);
BOOL ret = false;
static LPFN_ISWOW64PROCESS fnIsWow64Process = NULL;
if (!fnIsWow64Process) {
if (HMODULE hModule = GetModuleHandle(L"kernel32.dll"))
fnIsWow64Process = reinterpret_cast<LPFN_ISWOW64PROCESS>(GetProcAddress(hModule, "IsWow64Process"));
}
if (!fnIsWow64Process) {
qWarning("Cannot retrieve symbol 'IsWow64Process'.");
return false;
}
if (!fnIsWow64Process(hproc, &ret)) {
qWarning("IsWow64Process() failed for %p: %s",
hproc, qPrintable(Utils::winErrorMessage(GetLastError())));
return false;
}
return ret;
}
// Open the process and break into it
bool Debugger::Internal::interruptProcess(int pID, int engineType, QString *errorMessage, const bool engineExecutableIs64Bit)
{
bool ok = false;
HANDLE inferior = NULL;
do {
const DWORD rights = PROCESS_QUERY_INFORMATION|PROCESS_SET_INFORMATION
|PROCESS_VM_OPERATION|PROCESS_VM_WRITE|PROCESS_VM_READ
|PROCESS_DUP_HANDLE|PROCESS_TERMINATE|PROCESS_CREATE_THREAD|PROCESS_SUSPEND_RESUME;
inferior = OpenProcess(rights, FALSE, pID);
if (inferior == NULL) {
*errorMessage = QString::fromLatin1("Cannot open process %1: %2").
arg(pID).arg(Utils::winErrorMessage(GetLastError()));
break;
}
enum DebugBreakApi {
UseDebugBreakApi,
UseWin64Interrupt,
UseWin32Interrupt
};
/*
Windows 64 bit has a 32 bit subsystem (WOW64) which makes it possible to run a
32 bit application inside a 64 bit environment.
When GDB is used DebugBreakProcess must be called from the same system (32/64 bit) running
the inferior. If CDB is used we could in theory break wow64 processes,
but the break is actually a wow64 breakpoint. CDB is configured to ignore these
breakpoints, because they also appear on module loading.
Therefore we need helper executables (win(32/64)interrupt.exe) on Windows 64 bit calling
DebugBreakProcess from the correct system.
DebugBreak matrix for windows
Api = UseDebugBreakApi
Win64 = UseWin64Interrupt
Win32 = UseWin32Interrupt
N/A = This configuration is not possible
| Windows 32bit | Windows 64bit
| QtCreator 32bit | QtCreator 32bit | QtCreator 64bit
| Inferior 32bit | Inferior 32bit | Inferior 64bit | Inferior 32bit | Inferior 64bit |
----------|-----------------|-----------------|-----------------|-----------------|----------------|
CDB 32bit | Api | Api | NA | Win32 | NA |
64bit | NA | Win64 | Win64 | Api | Api |
----------|-----------------|-----------------|-----------------|-----------------|----------------|
GDB 32bit | Api | Api | NA | Win32 | NA |
64bit | NA | Api | Win64 | Win32 | Api |
----------|-----------------|-----------------|-----------------|-----------------|----------------|
*/
DebugBreakApi breakApi = UseDebugBreakApi;
#ifdef Q_OS_WIN64
if ((engineType == GdbEngineType && isWow64Process(inferior))
|| (engineType == CdbEngineType && !engineExecutableIs64Bit)) {
breakApi = UseWin32Interrupt;
}
#else
if (isWow64Process(GetCurrentProcess())
&& ((engineType == CdbEngineType && engineExecutableIs64Bit)
|| (engineType == GdbEngineType && !isWow64Process(inferior)))) {
breakApi = UseWin64Interrupt;
}
#endif
if (breakApi == UseDebugBreakApi) {
ok = DebugBreakProcess(inferior);
if (!ok)
*errorMessage = QLatin1String("DebugBreakProcess failed: ") + Utils::winErrorMessage(GetLastError());
} else {
const QString executable = breakApi == UseWin32Interrupt
? QCoreApplication::applicationDirPath() + QLatin1String("/win32interrupt.exe")
: QCoreApplication::applicationDirPath() + QLatin1String("/win64interrupt.exe");
if (!QFile::exists(executable)) {
*errorMessage = QString::fromLatin1("%1 does not exist. If you have built QtCreator "
"on your own ,checkout "
"http://qt.gitorious.org/qt-creator/binary-artifacts.").
arg(QDir::toNativeSeparators(executable));
break;
}
switch (QProcess::execute(executable, QStringList(QString::number(pID)))) {
case -2:
*errorMessage = QString::fromLatin1("Cannot start %1. Check src\\tools\\win64interrupt\\win64interrupt.c for more information.").
arg(QDir::toNativeSeparators(executable));
break;
case 0:
ok = true;
break;
default:
*errorMessage = QDir::toNativeSeparators(executable)
+ QLatin1String(" could not break the process.");
break;
}
break;
}
} while (false);
if (inferior != NULL)
CloseHandle(inferior);
if (!ok)
*errorMessage = msgCannotInterrupt(pID, *errorMessage);
return ok;
}
#else // Q_OS_WIN
#include <sys/types.h>
#include <signal.h>
#include <errno.h>
#include <string.h>
bool Debugger::Internal::interruptProcess(int pID, int /* engineType */,
QString *errorMessage, const bool /*engineExecutableIs64Bit*/)
{
if (pID <= 0) {
*errorMessage = msgCannotInterrupt(pID, QString::fromLatin1("Invalid process id."));
return false;
}
if (kill(pID, SIGINT)) {
*errorMessage = msgCannotInterrupt(pID, QString::fromLocal8Bit(strerror(errno)));
return false;
}
return true;
}
#endif // !Q_OS_WIN
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