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/****************************************************************************
**
** Copyright (C) 2013 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://qt.digia.com/licensing. For further information
** use the contact form at http://qt.digia.com/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 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: 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 "peutils.h"
#include <utils/winutils.h>
#include <QStringList>
#include <QDebug>
#include <climits>
#include <windows.h>
using Utils::winErrorMessage;
// Create a pointer from base and offset when rummaging around in
// a memory mapped file
template <class Ptr>
inline Ptr *makePtr(void *base, ptrdiff_t offset)
{
return reinterpret_cast<Ptr*>(static_cast<char*>(base) + offset);
}
// CodeView header
struct CV_HEADER
{
DWORD CvSignature; // NBxx
LONG Offset; // Always 0 for NB10
};
// CodeView NB10 debug information of a PDB 2.00 file (VS 6)
struct CV_INFO_PDB20
{
CV_HEADER Header;
DWORD Signature;
DWORD Age;
BYTE PdbFileName[1];
};
// CodeView RSDS debug information of a PDB 7.00 file
struct CV_INFO_PDB70
{
DWORD CvSignature;
GUID Signature;
DWORD Age;
BYTE PdbFileName[1];
};
// Retrieve the NT image header of an executable via the legacy DOS header.
static IMAGE_NT_HEADERS *getNtHeader(void *fileMemory, QString *errorMessage)
{
IMAGE_DOS_HEADER *dosHeader = static_cast<PIMAGE_DOS_HEADER>(fileMemory);
// Check DOS header consistency
if (IsBadReadPtr(dosHeader, sizeof(IMAGE_DOS_HEADER))
|| dosHeader->e_magic != IMAGE_DOS_SIGNATURE) {
*errorMessage = QString::fromLatin1("DOS header check failed.");
return 0;
}
// Retrieve NT header
IMAGE_NT_HEADERS *ntHeaders = makePtr<IMAGE_NT_HEADERS>(dosHeader, dosHeader->e_lfanew);
// check NT header consistency
if (IsBadReadPtr(ntHeaders, sizeof(ntHeaders->Signature))
|| ntHeaders->Signature != IMAGE_NT_SIGNATURE
|| IsBadReadPtr(&ntHeaders->FileHeader, sizeof(IMAGE_FILE_HEADER))) {
*errorMessage = QString::fromLatin1("NT header check failed.");
return 0;
}
// Check magic
const WORD magic = ntHeaders->OptionalHeader.Magic;
#ifdef __GNUC__ // MinGW does not have complete 64bit definitions.
if (magic != 0x10b) {
*errorMessage = QString::fromLatin1("NT header check failed; magic %1 is not that of a 32-bit executable.").
arg(magic);
return 0;
}
#else
if (magic != IMAGE_NT_OPTIONAL_HDR32_MAGIC && magic != IMAGE_NT_OPTIONAL_HDR64_MAGIC) {
*errorMessage = QString::fromLatin1("NT header check failed; magic %1 is none of %2, %3.").
arg(magic).arg(IMAGE_NT_OPTIONAL_HDR32_MAGIC).arg(IMAGE_NT_OPTIONAL_HDR64_MAGIC);
return 0;
}
#endif
// Check section headers
IMAGE_SECTION_HEADER *sectionHeaders = IMAGE_FIRST_SECTION(ntHeaders);
if (IsBadReadPtr(sectionHeaders, ntHeaders->FileHeader.NumberOfSections * sizeof(IMAGE_SECTION_HEADER))) {
*errorMessage = QString::fromLatin1("NT header section header check failed.");
return 0;
}
return ntHeaders;
}
// Find the COFF section an RVA belongs to and convert to file offset
static bool getFileOffsetFromRVA(IMAGE_NT_HEADERS *ntHeaders, DWORD rva, DWORD* fileOffset)
{
IMAGE_SECTION_HEADER *sectionHeader = IMAGE_FIRST_SECTION(ntHeaders);
for (int i = 0; i < ntHeaders->FileHeader.NumberOfSections; i++, sectionHeader++) {
const DWORD sectionSize = sectionHeader->Misc.VirtualSize ?
sectionHeader->Misc.VirtualSize : sectionHeader->SizeOfRawData;
if ((rva >= sectionHeader->VirtualAddress) && (rva < sectionHeader->VirtualAddress + sectionSize)) {
const DWORD diff = sectionHeader->VirtualAddress - sectionHeader->PointerToRawData;
*fileOffset = rva - diff;
return true;
}
}
return false;
}
// Retrieve debug directory and number of entries
static bool getDebugDirectory(IMAGE_NT_HEADERS *ntHeaders, void *fileMemory,
IMAGE_DEBUG_DIRECTORY **debugDir, int *count, QString *errorMessage)
{
DWORD debugDirRva = 0;
DWORD debugDirSize;
*debugDir = 0;
*count = 0;
#ifdef __GNUC__ // MinGW does not have complete 64bit definitions.
IMAGE_OPTIONAL_HEADER *optionalHeader = reinterpret_cast<IMAGE_OPTIONAL_HEADER*>(&(ntHeaders->OptionalHeader));
debugDirRva = optionalHeader->DataDirectory[IMAGE_DIRECTORY_ENTRY_DEBUG].VirtualAddress;
debugDirSize = optionalHeader->DataDirectory[IMAGE_DIRECTORY_ENTRY_DEBUG].Size;
#else
// Find the virtual address
const bool is64Bit = ntHeaders->OptionalHeader.Magic == IMAGE_NT_OPTIONAL_HDR64_MAGIC;
if (is64Bit) {
IMAGE_OPTIONAL_HEADER64 *optionalHeader64 = reinterpret_cast<IMAGE_OPTIONAL_HEADER64*>(&(ntHeaders->OptionalHeader));
debugDirRva = optionalHeader64->DataDirectory[IMAGE_DIRECTORY_ENTRY_DEBUG].VirtualAddress;
debugDirSize = optionalHeader64->DataDirectory[IMAGE_DIRECTORY_ENTRY_DEBUG].Size;
} else {
IMAGE_OPTIONAL_HEADER32 *optionalHeader32 = reinterpret_cast<IMAGE_OPTIONAL_HEADER32*>(&(ntHeaders->OptionalHeader));
debugDirRva = optionalHeader32->DataDirectory[IMAGE_DIRECTORY_ENTRY_DEBUG].VirtualAddress;
debugDirSize = optionalHeader32->DataDirectory[IMAGE_DIRECTORY_ENTRY_DEBUG].Size;
}
#endif
// Empty. This is the case for MinGW binaries
if (debugDirSize == 0)
return true;
// Look up in file
DWORD debugDirOffset;
if (!getFileOffsetFromRVA(ntHeaders, debugDirRva, &debugDirOffset)) {
*errorMessage = QString::fromLatin1("Unable to locate debug dir RVA %1/%2.").arg(debugDirRva).arg(debugDirSize);
return false;
}
*debugDir = makePtr<IMAGE_DEBUG_DIRECTORY>(fileMemory, debugDirOffset);
// Check
if (IsBadReadPtr(*debugDir, debugDirSize) || debugDirSize < sizeof(IMAGE_DEBUG_DIRECTORY)) {
*errorMessage = QString::fromLatin1("Debug directory corrupted.");
return 0;
}
*count = debugDirSize / sizeof(IMAGE_DEBUG_DIRECTORY);
return debugDir;
}
// Return the PDB file of a Code View debug section
static QString getPDBFileOfCodeViewSection(void *debugInfo, DWORD size)
{
static const DWORD CV_SIGNATURE_NB10 = 0x3031424e; // '01BN';
static const DWORD CV_SIGNATURE_RSDS = 0x53445352; // 'SDSR';
if (IsBadReadPtr(debugInfo, size) || size < sizeof(DWORD))
return QString();
const DWORD cvSignature = *static_cast<DWORD*>(debugInfo);
if (cvSignature == CV_SIGNATURE_NB10) {
CV_INFO_PDB20* cvInfo = static_cast<CV_INFO_PDB20*>(debugInfo);
if (IsBadReadPtr(debugInfo, sizeof(CV_INFO_PDB20)))
return QString();
CHAR* pdbFileName = reinterpret_cast<CHAR*>(cvInfo->PdbFileName);
if (IsBadStringPtrA(pdbFileName, UINT_MAX))
return QString();
return QString::fromLocal8Bit(pdbFileName);
}
if (cvSignature == CV_SIGNATURE_RSDS) {
CV_INFO_PDB70* cvInfo = static_cast<CV_INFO_PDB70*>(debugInfo);
if (IsBadReadPtr(debugInfo, sizeof(CV_INFO_PDB70)))
return QString();
CHAR* pdbFileName = reinterpret_cast<CHAR*>(cvInfo->PdbFileName);
if (IsBadStringPtrA(pdbFileName, UINT_MAX))
return QString();
return QString::fromLocal8Bit(pdbFileName);
}
return QString();
}
// Collect all PDB files of all debug sections
static void collectPDBfiles(void *fileMemory, IMAGE_DEBUG_DIRECTORY *directoryBase, int count, QStringList *pdbFiles)
{
for (int i = 0; i < count; i++, directoryBase++)
if (directoryBase->Type == IMAGE_DEBUG_TYPE_CODEVIEW) {
const QString pdb = getPDBFileOfCodeViewSection(static_cast<char*>(fileMemory) + directoryBase->PointerToRawData, directoryBase->SizeOfData);
if (!pdb.isEmpty())
pdbFiles->push_back(pdb);
}
}
namespace Debugger {
namespace Internal {
bool getPDBFiles(const QString &peExecutableFileName, QStringList *rc, QString *errorMessage)
{
HANDLE hFile = NULL;
HANDLE hFileMap = NULL;
void *fileMemory = 0;
bool success = false;
rc->clear();
do {
// Create a memory mapping of the file
hFile = CreateFile(reinterpret_cast<const WCHAR*>(peExecutableFileName.utf16()), GENERIC_READ, FILE_SHARE_READ, NULL,
OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
if (hFile == INVALID_HANDLE_VALUE || hFile == NULL) {
*errorMessage = QString::fromLatin1("Cannot open '%1': %2").arg(peExecutableFileName, winErrorMessage(GetLastError()));
break;
}
hFileMap = CreateFileMapping(hFile, NULL, PAGE_READONLY, 0, 0, NULL);
if (hFileMap == NULL) {
*errorMessage = QString::fromLatin1("Cannot create file mapping of '%1': %2").arg(peExecutableFileName, winErrorMessage(GetLastError()));
break;
}
fileMemory = MapViewOfFile(hFileMap, FILE_MAP_READ, 0, 0, 0);
if (!fileMemory) {
*errorMessage = QString::fromLatin1("Cannot map '%1': %2").arg(peExecutableFileName, winErrorMessage(GetLastError()));
break;
}
IMAGE_NT_HEADERS *ntHeaders = getNtHeader(fileMemory, errorMessage);
if (!ntHeaders)
break;
int debugSectionCount;
IMAGE_DEBUG_DIRECTORY *debugDir;
if (!getDebugDirectory(ntHeaders, fileMemory, &debugDir, &debugSectionCount, errorMessage))
return false;
if (debugSectionCount)
collectPDBfiles(fileMemory, debugDir, debugSectionCount, rc);
success = true;
} while(false);
if (fileMemory)
UnmapViewOfFile(fileMemory);
if (hFileMap != NULL)
CloseHandle(hFileMap);
if (hFile != NULL && hFile != INVALID_HANDLE_VALUE)
CloseHandle(hFile);
return success;
}
} // namespace Internal
} // namespace Debugger
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