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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
#include "procinterrupt.h"
#include "debuggerconstants.h"
#include <QDir>
#include <QGuiApplication>
#include <QProcess> // makes kill visible on Windows.
using namespace Debugger::Internal;
static inline QString msgCannotInterrupt(qint64 pid, const QString &why)
{
return QString::fromLatin1("Cannot interrupt process %1: %2").arg(pid).arg(why);
}
#if defined(Q_OS_WIN)
#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)
{
using LPFN_ISWOW64PROCESS = BOOL (WINAPI*)(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(qint64 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, DWORD(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 = "DebugBreakProcess failed: " + Utils::winErrorMessage(GetLastError());
} else {
const QString executable = breakApi == UseWin32Interrupt
? QCoreApplication::applicationDirPath() + "/win32interrupt.exe"
: QCoreApplication::applicationDirPath() + "/win64interrupt.exe";
if (!QFileInfo::exists(executable)) {
*errorMessage = QString::fromLatin1(
"%1 does not exist. If you have built %2 "
"on your own, checkout "
"https://code.qt.io/cgit/qt-creator/binary-artifacts.git/.")
.arg(QDir::toNativeSeparators(executable),
QGuiApplication::applicationDisplayName());
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)
+ " 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(qint64 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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