BOOL
InitDbgHelp(
VOID)
{
static const char *pszMsSymbolServer = "srv**symbols*http://msdl.microsoft.com/download/symbols";
DWORD Options;
/* Save current process ;-) */
ghProcess = GetCurrentProcess();
/* Initialize dbghelp */
if (!SymInitialize(ghProcess, 0, FALSE))
{
error("SymInitialize() failed.");
return FALSE;
}
/* Set options */
Options = SymGetOptions();
Options |= SYMOPT_ALLOW_ABSOLUTE_SYMBOLS | SYMOPT_INCLUDE_32BIT_MODULES | SYMOPT_DEBUG;// | SYMOPT_NO_PROMPTS;
Options &= ~SYMOPT_DEFERRED_LOADS;
SymSetOptions(Options);
/* Test if we can reach the MS symbol server */
if (!SymSrvIsStore(ghProcess, pszMsSymbolServer))
{
error("Failed to connect to symbol server.");
return FALSE;
}
/* Set MS symbol server as symbol search path */
SymSetSearchPath(ghProcess, pszMsSymbolServer);
return TRUE;
}
BOOL
ProcessModuleLoad ( PDEBUGPACKET dp, LPDEBUG_EVENT de )
/*++
Routine Description:
Process all module load debug events, create process & dll load.
The purpose is to allocate a MODULEINFO structure, fill in the
necessary values, and load the symbol table.
Arguments:
dp - pointer to a debug packet
de - pointer to a debug event structure
Return Value:
TRUE - everything worked
FALSE - we're hosed
--*/
{
HANDLE hFile;
DWORD dwBaseOfImage;
LPSTR SymbolPath;
if (de->dwDebugEventCode == CREATE_PROCESS_DEBUG_EVENT) {
hFile = de->u.CreateProcessInfo.hFile;
dwBaseOfImage = (DWORD)de->u.CreateProcessInfo.lpBaseOfImage;
dp->hProcess = de->u.CreateProcessInfo.hProcess;
dp->dwProcessId = de->dwProcessId;
SymInitialize( dp->hProcess, NULL, FALSE );
SymbolPath = GetSymbolSearchPath();
SymSetSearchPath( dp->hProcess, SymbolPath );
free( SymbolPath );
} else if (de->dwDebugEventCode == LOAD_DLL_DEBUG_EVENT) {
hFile = de->u.LoadDll.hFile;
dwBaseOfImage = (DWORD)de->u.LoadDll.lpBaseOfDll;
}
if ((hFile == NULL) || (hFile == INVALID_HANDLE_VALUE)) {
return FALSE;
}
if (!SymLoadModule( dp->hProcess, hFile, NULL, NULL, dwBaseOfImage, 0 )) {
return FALSE;
} else {
if (de->dwDebugEventCode == CREATE_PROCESS_DEBUG_EVENT) {
IMAGEHLP_MODULE mi;
if (SymGetModuleInfo( dp->hProcess, dwBaseOfImage, &mi )) {
strcpy( szApp, mi.ImageName );
}
}
}
return TRUE;
}
void LoadModules()
{
const int MAX_MOD_HANDLES = 1024;
HMODULE StaticModuleHandleArray[MAX_MOD_HANDLES];
HMODULE* ModuleHandleArray;
DWORD Needed;
HANDLE hProcess = GetCurrentProcess();
ModuleHandleArray = &StaticModuleHandleArray[0];
BOOL result = EnumProcessModules(hProcess, ModuleHandleArray, sizeof(ModuleHandleArray), &Needed);
if( !result )
{
DWORD error = GetLastError();
DebugLog("EnumProcessModule failed: error = %d", error);
return;
}
if( Needed > sizeof(ModuleHandleArray) ) // was our static array not big enough?
{
ModuleHandleArray = (HMODULE*)DialogAllocator.AllocateBytes(Needed, sizeof(void*));
BOOL result = EnumProcessModules(hProcess, ModuleHandleArray, Needed, &Needed);
if( !result )
{
DWORD error = GetLastError();
DebugLog("EnumProcessModule(2) failed: error = %d", error);
return;
}
}
int NumModules = Needed / sizeof(HMODULE);
MODULEINFO ModuleInfo;
char ModuleFilePath[MAX_PATH];
char ModuleName[256];
char SearchFilePath[MAX_PATH];
for( int i = 0; i < NumModules; i++ )
{
GetModuleInformation(hProcess, ModuleHandleArray[i], &ModuleInfo, sizeof(MODULEINFO));
GetModuleFileNameExA(hProcess, ModuleHandleArray[i], ModuleFilePath, MAX_PATH);
GetModuleBaseNameA(hProcess, ModuleHandleArray[i], ModuleName, 256);
char* FileName = nullptr;
GetFullPathNameA(ModuleFilePath, MAX_PATH, SearchFilePath, &FileName);
*FileName = 0;
SymSetSearchPath(hApplicationProcess, SearchFilePath);
DWORD64 BaseAddress = SymLoadModule64(hApplicationProcess, ModuleHandleArray[i], ModuleFilePath, ModuleName, (DWORD64)ModuleInfo.lpBaseOfDll, (DWORD) ModuleInfo.SizeOfImage);
if( !BaseAddress )
{
DWORD error = GetLastError();
DebugLog("SymLoadModule64 failed: error = %d", error);
}
}
}
void SymEngine::Close()
{
if (isInitialized)
{
SymCleanup(hProcess);
isInitialized = false;
}
if (needRestorePreviousSettings)
{
HANDLE currentProcess = GetCurrentProcess();
SymSetOptions(previousOptions);
SymSetSearchPath(currentProcess, previousSearchPath);
SymInitialize(currentProcess, NULL, TRUE);
needRestorePreviousSettings = false;
}
}
int main(int argc, char* argv[])
{
if (argc != 2)
{
printf("\n *** OffsetToSource by Sasha Goldshtein (blog.sashag.net), (C) 2013 ***\n\n");
printf(" Usage: OffsetToSource module[.exe|.dll][!function]+0x<offset>\n\n");
printf(" Example: OffsetToSource myapp!main+0xd0\n");
printf(" Example: OffsetToSource myapp+0x441d0\n");
return 2;
}
const HANDLE hProcess = GetCurrentProcess();
SymSetOptions(SYMOPT_UNDNAME | SYMOPT_DEFERRED_LOADS | SYMOPT_DEBUG | SYMOPT_LOAD_LINES);
if (FALSE == SymInitialize(hProcess, NULL, FALSE))
{
printf("*** Error initializing symbol engine: 0x%x\n", GetLastError());
return 1;
}
CHAR symbolPath[2048], path[2048];
GetEnvironmentVariableA("PATH", path, ARRAYSIZE(symbolPath));
GetEnvironmentVariableA("_NT_SYMBOL_PATH", symbolPath, ARRAYSIZE(symbolPath));
strcat_s(path, ";.;");
strcat_s(path, symbolPath);
SymSetSearchPath(hProcess, path);
//Parse argv[1] to obtain the module name, symbol name, and offset
// Example format: module!Class::Method+0x40
// Another option: module+0x1000
BOOL symbolNameSpecified;
CHAR moduleName[200], symName[200];
DWORD offset = 0;
CHAR* bang = strchr(argv[1], '!');
if (bang != NULL)
{
strncpy_s(moduleName, argv[1], bang - argv[1]);
CHAR* plus = strchr(bang, '+');
if (plus != NULL)
{
strncpy_s(symName, bang + 1, plus - bang - 1);
sscanf_s(plus + 1, "0x%x", &offset);
}
else
{
strcpy_s(symName, bang + 1);
}
symbolNameSpecified = TRUE;
}
else
{
CHAR* plus = strchr(argv[1], '+');
if (plus == NULL)
{
printf("*** Invalid input: %s\n", argv[1]);
return 1;
}
strncpy_s(moduleName, argv[1], plus - argv[1]);
sscanf_s(plus + 1, "0x%x", &offset);
symbolNameSpecified = FALSE;
}
BOOL nakedName = strstr(moduleName, ".dll") == NULL && strstr(moduleName, ".exe") == NULL;
if (nakedName)
{
strcat_s(moduleName, ".dll");
}
DWORD64 moduleBase;
while (0 == (moduleBase = SymLoadModule64(hProcess, NULL, moduleName, NULL, 0, 0)))
{
if (nakedName)
{
strcpy(strstr(moduleName, ".dll"), ".exe");
nakedName = FALSE;
continue;
}
printf("*** Error loading symbols: 0x%x\n", GetLastError());
return 1;
}
DWORD64 symbolAddress;
if (symbolNameSpecified)
{
ULONG64 buffer[(sizeof(SYMBOL_INFO) + MAX_SYM_NAME * sizeof(TCHAR) + sizeof(ULONG64) - 1) / sizeof(ULONG64)];
PSYMBOL_INFO pSymbol = (PSYMBOL_INFO)buffer;
pSymbol->SizeOfStruct = sizeof(SYMBOL_INFO);
pSymbol->MaxNameLen = MAX_SYM_NAME;
if (FALSE == SymFromName(hProcess, symName, pSymbol))
{
printf("*** Error retrieving symbol information for symbol %s: 0x%x\n",
argv[1], GetLastError());
return 1;
}
symbolAddress = pSymbol->Address + offset;
}
else
{
symbolAddress = moduleBase + offset;
}
DWORD displacement;
IMAGEHLP_LINE64 line;
RtlZeroMemory(&line, sizeof(line));
line.SizeOfStruct = sizeof(line);
if (FALSE == SymGetLineFromAddr64(hProcess, symbolAddress, &displacement, &line))
{
printf("*** Error retrieving source line for %s: 0x%x\n", argv[1], GetLastError());
return 1;
}
printf("%s [0x%I64x] = %s line %d (+0x%x)\n", argv[1], symbolAddress,
line.FileName, line.LineNumber, displacement);
SymCleanup(hProcess);
return 0;
}
int main(int argc, char *argv[]) {
DWORD error;
HANDLE process;
ULONG64 module_base;
int i;
char* search;
char buf[256]; /* Enough to hold one hex address, I trust! */
int rv = 0;
/* We may add SYMOPT_UNDNAME if --demangle is specified: */
DWORD symopts = SYMOPT_DEFERRED_LOADS | SYMOPT_DEBUG | SYMOPT_LOAD_LINES;
char* filename = "a.out"; /* The default if -e isn't specified */
int print_function_name = 0; /* Set to 1 if -f is specified */
for (i = 1; i < argc; i++) {
if (strcmp(argv[i], "--functions") == 0 || strcmp(argv[i], "-f") == 0) {
print_function_name = 1;
} else if (strcmp(argv[i], "--demangle") == 0 ||
strcmp(argv[i], "-C") == 0) {
symopts |= SYMOPT_UNDNAME;
} else if (strcmp(argv[i], "-e") == 0) {
if (i + 1 >= argc) {
fprintf(stderr, "FATAL ERROR: -e must be followed by a filename\n");
return 1;
}
filename = argv[i+1];
i++; /* to skip over filename too */
} else if (strcmp(argv[i], "--help") == 0) {
usage();
exit(0);
} else {
usage();
exit(1);
}
}
process = GetCurrentProcess();
if (!SymInitialize(process, NULL, FALSE)) {
error = GetLastError();
fprintf(stderr, "SymInitialize returned error : %d\n", error);
return 1;
}
search = malloc(SEARCH_CAP);
if (SymGetSearchPath(process, search, SEARCH_CAP)) {
if (strlen(search) + sizeof(";" WEBSYM) > SEARCH_CAP) {
fprintf(stderr, "Search path too long\n");
SymCleanup(process);
return 1;
}
strcat(search, ";" WEBSYM);
} else {
error = GetLastError();
fprintf(stderr, "SymGetSearchPath returned error : %d\n", error);
rv = 1; /* An error, but not a fatal one */
strcpy(search, WEBSYM); /* Use a default value */
}
if (!SymSetSearchPath(process, search)) {
error = GetLastError();
fprintf(stderr, "SymSetSearchPath returned error : %d\n", error);
rv = 1; /* An error, but not a fatal one */
}
SymSetOptions(symopts);
module_base = SymLoadModuleEx(process, NULL, filename, NULL, 0, 0, NULL, 0);
if (!module_base) {
/* SymLoadModuleEx failed */
error = GetLastError();
fprintf(stderr, "SymLoadModuleEx returned error : %d for %s\n",
error, filename);
SymCleanup(process);
return 1;
}
buf[sizeof(buf)-1] = '\0'; /* Just to be safe */
while (fgets(buf, sizeof(buf)-1, stdin)) {
/* GNU addr2line seems to just do a strtol and ignore any
* weird characters it gets, so we will too.
*/
unsigned __int64 addr = _strtoui64(buf, NULL, 16);
ULONG64 buffer[(sizeof(SYMBOL_INFO) +
MAX_SYM_NAME*sizeof(TCHAR) +
sizeof(ULONG64) - 1)
/ sizeof(ULONG64)];
PSYMBOL_INFO pSymbol = (PSYMBOL_INFO)buffer;
IMAGEHLP_LINE64 line;
DWORD dummy;
pSymbol->SizeOfStruct = sizeof(SYMBOL_INFO);
pSymbol->MaxNameLen = MAX_SYM_NAME;
if (print_function_name) {
if (SymFromAddr(process, (DWORD64)addr, NULL, pSymbol)) {
printf("%s\n", pSymbol->Name);
} else {
printf("??\n");
}
}
line.SizeOfStruct = sizeof(IMAGEHLP_LINE64);
if (SymGetLineFromAddr64(process, (DWORD64)addr, &dummy, &line)) {
printf("%s:%d\n", line.FileName, (int)line.LineNumber);
} else {
printf("??:0\n");
}
}
SymUnloadModule64(process, module_base);
SymCleanup(process);
return rv;
}
/**
* Loads modules for current process.
*/
static void LoadProcessModules(const FString &RemoteStorage)
{
int32 ErrorCode = 0;
HANDLE ProcessHandle = GetCurrentProcess();
// Enumerate process modules.
HMODULE* ModuleHandlePointer = GetProcessModules(ProcessHandle);
if (!ModuleHandlePointer)
{
ErrorCode = GetLastError();
return;
}
// Load the modules.
for( int32 ModuleIndex = 0; ModuleHandlePointer[ModuleIndex]; ModuleIndex++ )
{
MODULEINFO ModuleInfo = {0};
#if WINVER > 0x502
WCHAR ModuleName[FProgramCounterSymbolInfo::MAX_NAME_LENGHT] = {0};
WCHAR ImageName[FProgramCounterSymbolInfo::MAX_NAME_LENGHT] = {0};
#else
ANSICHAR ModuleName[FProgramCounterSymbolInfo::MAX_NAME_LENGHT] = { 0 };
ANSICHAR ImageName[FProgramCounterSymbolInfo::MAX_NAME_LENGHT] = { 0 };
#endif
#if PLATFORM_64BITS
static_assert(sizeof( MODULEINFO ) == 24, "Broken alignment for 64bit Windows include.");
#else
static_assert(sizeof( MODULEINFO ) == 12, "Broken alignment for 32bit Windows include.");
#endif
FGetModuleInformation( ProcessHandle, ModuleHandlePointer[ModuleIndex], &ModuleInfo, sizeof( ModuleInfo ) );
FGetModuleFileNameEx( ProcessHandle, ModuleHandlePointer[ModuleIndex], ImageName, FProgramCounterSymbolInfo::MAX_NAME_LENGHT );
FGetModuleBaseName( ProcessHandle, ModuleHandlePointer[ModuleIndex], ModuleName, FProgramCounterSymbolInfo::MAX_NAME_LENGHT );
// Set the search path to find PDBs in the same folder as the DLL.
#if WINVER > 0x502
WCHAR SearchPath[MAX_PATH] = {0};
WCHAR* FileName = NULL;
const auto Result = GetFullPathNameW( ImageName, MAX_PATH, SearchPath, &FileName );
#else
ANSICHAR SearchPath[MAX_PATH] = { 0 };
ANSICHAR* FileName = NULL;
const auto Result = GetFullPathNameA( ImageName, MAX_PATH, SearchPath, &FileName );
#endif
FString SearchPathList;
if (Result != 0 && Result < MAX_PATH)
{
*FileName = 0;
#if WINVER > 0x502
SearchPathList = SearchPath;
#else
SearchPathList = ANSI_TO_TCHAR(SearchPath);
#endif
}
if (!RemoteStorage.IsEmpty())
{
if (!SearchPathList.IsEmpty())
{
SearchPathList.AppendChar(';');
}
SearchPathList.Append(RemoteStorage);
}
#if WINVER > 0x502
SymSetSearchPathW(ProcessHandle, *SearchPathList);
// Load module.
const DWORD64 BaseAddress = SymLoadModuleExW( ProcessHandle, ModuleHandlePointer[ModuleIndex], ImageName, ModuleName, (DWORD64) ModuleInfo.lpBaseOfDll, (uint32) ModuleInfo.SizeOfImage, NULL, 0 );
if( !BaseAddress )
{
ErrorCode = GetLastError();
UE_LOG(LogWindows, Warning, TEXT("SymLoadModuleExW. Error: %d"), GetLastError());
}
#else
SymSetSearchPath(ProcessHandle, TCHAR_TO_ANSI(*SearchPathList));
// Load module.
const DWORD64 BaseAddress = SymLoadModuleEx( ProcessHandle, ModuleHandlePointer[ModuleIndex], ImageName, ModuleName, (DWORD64)ModuleInfo.lpBaseOfDll, (uint32)ModuleInfo.SizeOfImage, NULL, 0 );
if (!BaseAddress)
{
ErrorCode = GetLastError();
UE_LOG(LogWindows, Warning, TEXT("SymLoadModuleEx. Error: %d"), GetLastError());
}
#endif
}
// Free the module handle pointer allocated in case the static array was insufficient.
FMemory::Free(ModuleHandlePointer);
}
int main(int argc, char *argv[]) {
DWORD error;
HANDLE process;
ULONG64 module_base;
SYM_CONTEXT ctx;
int i;
char* search;
char* filename = NULL;
int rv = 0;
/* We may add SYMOPT_UNDNAME if --demangle is specified: */
DWORD symopts = SYMOPT_DEFERRED_LOADS | SYMOPT_DEBUG;
for (i = 1; i < argc; i++) {
if (strcmp(argv[i], "--demangle") == 0 || strcmp(argv[i], "-C") == 0) {
symopts |= SYMOPT_UNDNAME;
} else if (strcmp(argv[i], "--help") == 0) {
usage();
exit(0);
} else {
break;
}
}
if (i != argc - 1) {
usage();
exit(1);
}
filename = argv[i];
process = GetCurrentProcess();
if (!SymInitialize(process, NULL, FALSE)) {
error = GetLastError();
fprintf(stderr, "SymInitialize returned error : %d\n", error);
return 1;
}
search = malloc(SEARCH_CAP);
if (SymGetSearchPath(process, search, SEARCH_CAP)) {
if (strlen(search) + sizeof(";" WEBSYM) > SEARCH_CAP) {
fprintf(stderr, "Search path too long\n");
SymCleanup(process);
return 1;
}
strcat(search, ";" WEBSYM);
} else {
error = GetLastError();
fprintf(stderr, "SymGetSearchPath returned error : %d\n", error);
rv = 1; /* An error, but not a fatal one */
strcpy(search, WEBSYM); /* Use a default value */
}
if (!SymSetSearchPath(process, search)) {
error = GetLastError();
fprintf(stderr, "SymSetSearchPath returned error : %d\n", error);
rv = 1; /* An error, but not a fatal one */
}
SymSetOptions(symopts);
module_base = SymLoadModuleEx(process, NULL, filename, NULL, 0, 0, NULL, 0);
if (!module_base) {
/* SymLoadModuleEx failed */
error = GetLastError();
fprintf(stderr, "SymLoadModuleEx returned error : %d for %s\n",
error, filename);
SymCleanup(process);
return 1;
}
ShowSymbolInfo(process, module_base);
memset(&ctx, 0, sizeof(ctx));
ctx.module_base = module_base;
if (!SymEnumSymbols(process, module_base, NULL, EnumSymProc, &ctx)) {
error = GetLastError();
fprintf(stderr, "SymEnumSymbols returned error: %d\n", error);
rv = 1;
} else {
DWORD j;
qsort(ctx.syms, ctx.syms_len, sizeof(ctx.syms[0]), sym_cmp);
for (j = 0; j < ctx.syms_len; j++) {
printf("%016I64x X %s\n", ctx.syms[j].addr, ctx.syms[j].name);
}
/* In a perfect world, maybe we'd clean up ctx's memory? */
}
SymUnloadModule64(process, module_base);
SymCleanup(process);
return rv;
}
int main(int argc, char* argv[])
{
// Tell dbghelp to print diagnostics to the debugger output.
SymSetOptions(SYMOPT_DEBUG);
// Initialize dbghelp
const HANDLE fakeProcess = (HANDLE)1;
BOOL result = SymInitialize(fakeProcess, NULL, FALSE);
#ifdef TESTING
// Set a search path and cache directory. If this isn't set
// then _NT_SYMBOL_PATH will be used instead.
// Force setting it here to make sure that the test succeeds.
SymSetSearchPath(fakeProcess,
"SRV*c:\\symbolstest*http://msdl.microsoft.com/download/symbols");
// Valid PDB data to test the code.
std::string gTextArg = "072FF0EB54D24DFAAE9D13885486EE09";
const char* ageText = "2";
const char* fileName = "kernel32.pdb";
// Valid PE data to test the code
fileName = "crypt32.dll";
const char* dateStampText = "4802A0D7";
const char* sizeText = "95000";
//fileName = "chrome_child.dll";
//const char* dateStampText = "5420D824";
//const char* sizeText = "20a6000";
#else
if (argc < 4)
{
printf("Error: insufficient arguments.\n");
printf("Usage: %s guid age pdbname\n", argv[0]);
printf("Usage: %s dateStamp size pename\n", argv[0]);
printf("Example: %s 6720c31f4ac24f3ab0243e0641a4412f 1 "
"chrome_child.dll.pdb\n", argv[0]);
printf("Example: %s 4802A0D7 95000 crypt32.dll\n", argv[0]);
return 0;
}
std::string gTextArg = argv[1];
const char* dateStampText = argv[1];
const char* ageText = argv[2];
const char* sizeText = argv[2];
const char* fileName = argv[3];
#endif
// Parse the GUID and age from the text
GUID g = {};
DWORD age = 0;
DWORD dateStamp = 0;
DWORD size = 0;
// Settings for SymFindFileInPath
void* id = nullptr;
DWORD flags = 0;
DWORD two = 0;
const char* ext = strrchr(fileName, '.');
if (!ext)
{
printf("No extension found on %s. Fatal error.\n", fileName);
return 0;
}
if (_stricmp(ext, ".pdb") == 0)
{
std::string gText;
// Scan the GUID argument and remove all non-hex characters. This allows
// passing GUIDs with '-', '{', and '}' characters.
for (auto c : gTextArg)
{
if (isxdigit(c))
{
gText.push_back(c);
}
}
printf("Parsing symbol data for a PDB file.\n");
if (gText.size() != 32)
{
printf("Error: GUIDs must be exactly 32 characters"
" (%s was stripped to %s).\n", gTextArg.c_str(), gText.c_str());
return 10;
}
int count = sscanf_s(gText.substr(0, 8).c_str(), "%x", &g.Data1);
DWORD temp;
count += sscanf_s(gText.substr(8, 4).c_str(), "%x", &temp);
g.Data2 = (unsigned short)temp;
count += sscanf_s(gText.substr(12, 4).c_str(), "%x", &temp);
g.Data3 = (unsigned short)temp;
for (auto i = 0; i < ARRAYSIZE(g.Data4); ++i)
{
count += sscanf_s(gText.substr(16 + i * 2, 2).c_str(), "%x", &temp);
g.Data4[i] = (unsigned char)temp;
}
count += sscanf_s(ageText, "%x", &age);
if (count != 12)
{
printf("Error: couldn't parse the GUID/age string. Sorry.\n");
return 10;
}
flags = SSRVOPT_GUIDPTR;
id = &g;
two = age;
printf("Looking for %s %s %s.\n", gText.c_str(), ageText, fileName);
}
else
{
printf("Parsing symbol data for a PE (.dll or .exe) file.\n");
if (strlen(dateStampText) != 8)
printf("Warning!!! The datestamp (%s) is not eight characters long. "
"This is usually wrong.\n", dateStampText);
int count = sscanf_s(dateStampText, "%x", &dateStamp);
count += sscanf_s(sizeText, "%x", &size);
flags = SSRVOPT_DWORDPTR;
id = &dateStamp;
two = size;
printf("Looking for %s %x %x.\n", fileName, dateStamp, two);
}
char filePath[MAX_PATH] = {};
DWORD three = 0;
if (SymFindFileInPath(fakeProcess, NULL, fileName, id, two, three,
flags, filePath, NULL, NULL))
{
printf("Found symbol file - placed it in %s.\n", filePath);
}
else
{
printf("Error: symbols not found - error %u. Are dbghelp.dll and "
"symsrv.dll in the same directory as this executable?\n",
GetLastError());
printf("Note that symbol server lookups sometimes fail randomly. "
"Try again?\n");
}
SymCleanup(fakeProcess);
return 0;
}
bool CATDbgHelper::Open( const string& sParameter, const unsigned long iLong )
{
LOG_FUNC_ENTRY("CATDbgHelper::Open");
// Verify that file exits. Version 5.1.2600.5512 of dbghelp.dll does not correctly
// return error code if missing image file. This can lead upto applicaton crash.
if ( ! CATBase::FileExists( sParameter.c_str() ) )
{
LOG_STRING( "Missing image file: " << sParameter );
return false;
}
// Is it urel try read map?
if ( sParameter.find( "\\urel\\" ) != string::npos )
{
string sMapFile = sParameter;
sMapFile.append( ".map" );
ReadMapFile( sMapFile );
}
// Set base address used
m_BaseAddress = iLong + AT_VIRTUAL_OFFSET_DBGHELPER;
// Binary file (also referred as symbol).
size_t length = sParameter.length();
if ( length == 0 )
{
LOG_STRING("DbgHelp:Invalid binary parameter.");
return false;
}
char* pChar = new char[ sParameter.length()+1 ];
strcpy( pChar, sParameter.c_str() );
// Have to be casted to PSTR before using dbg api. Even tho its typedef same.
// This will avoid access violations bug.
// Note pChar is not deleted because its the member pointer just casted its
// memory allocation freed in destructor.
if ( m_pBinaryFile )
delete[] m_pBinaryFile;
m_pBinaryFile = (PSTR) pChar;
// Initialize dbghelper if not done only once.
if ( ! CDBGHELPER_OPEN )
{
// Set symbol options
SymSetOptions( SYMOPT_LOAD_LINES | SYMOPT_DEBUG | SYMOPT_UNDNAME | SYMOPT_LOAD_ANYTHING );
if ( !SymInitialize( GetCurrentProcess(), NULL, TRUE ) )
{
LOG_STRING("DbgHelp:Error initializing dbghelper " << (int) GetLastError());
return false;
}
LOG_STRING("DbgHelp:dbghelper opened.");
CDBGHELPER_OPEN = true;
}
// Set symbol search path.
if ( !SymSetSearchPath( GetCurrentProcess(), NULL ) )
{
LOG_STRING("DbgHelp:Error setting symbol search path " << (int) GetLastError());
return false;
}
// Load module.
DWORD64 ret;
ret = SymLoadModule64( GetCurrentProcess(), NULL, m_pBinaryFile, NULL, m_BaseAddress, NULL ); // 5.1 api version.
if ( ret != m_BaseAddress && ret != 0)
{
LOG_STRING("Dbghelp:Module load failed " << (int) GetLastError());
return false;
}
CDBGHELPER_CLIENTS++;
return true;
}
