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/****************************************************************************
* *
* OpenNI 1.x Alpha *
* Copyright (C) 2011 PrimeSense Ltd. *
* *
* This file is part of OpenNI. *
* *
* OpenNI is free software: you can redistribute it and/or modify *
* it under the terms of the GNU Lesser General Public License as published *
* by the Free Software Foundation, either version 3 of the License, or *
* (at your option) any later version. *
* *
* OpenNI is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU Lesser General Public License for more details. *
* *
* You should have received a copy of the GNU Lesser General Public License *
* along with OpenNI. If not, see <http://www.gnu.org/licenses/>. *
* *
****************************************************************************/
//---------------------------------------------------------------------------
// Includes
//---------------------------------------------------------------------------
#include <XnOS.h>
#include <dbghelp.h>
#include <XnLog.h>
//---------------------------------------------------------------------------
// Types
//---------------------------------------------------------------------------
typedef BOOL (__stdcall *StackWalk64Prot)(
DWORD MachineType,
HANDLE hProcess,
HANDLE hThread,
LPSTACKFRAME64 StackFrame,
PVOID ContextRecord,
PREAD_PROCESS_MEMORY_ROUTINE64 ReadMemoryRoutine,
PFUNCTION_TABLE_ACCESS_ROUTINE64 FunctionTableAccessRoutine,
PGET_MODULE_BASE_ROUTINE64 GetModuleBaseRoutine,
PTRANSLATE_ADDRESS_ROUTINE64 TranslateAddress
);
typedef BOOL (__stdcall *SymInitializeProt)(HANDLE hProcess, PSTR UserSearchPath, BOOL fInvadeProcess);
typedef DWORD (__stdcall *SymSetOptionsProt)(DWORD SymOptions);
typedef BOOL (__stdcall *SymFromAddrProt)(HANDLE hProcess, DWORD64 Address, PDWORD64 Displacement, PSYMBOL_INFO Symbol);
typedef PVOID (__stdcall *SymFunctionTableAccess64Prot)(HANDLE hProcess, DWORD64 AddrBase);
typedef DWORD64 (__stdcall *SymGetModuleBase64Prot)(HANDLE hProcess, DWORD64 qwAddr);
//---------------------------------------------------------------------------
// Global Variables
//---------------------------------------------------------------------------
static XnBool g_bInitialized = FALSE;
StackWalk64Prot g_pStackWalk64 = NULL;
SymFromAddrProt g_pSymFromAddr = NULL;
SymFunctionTableAccess64Prot g_pSymFunctionTableAccess64 = NULL;
SymGetModuleBase64Prot g_pSymGetModuleBase64 = NULL;
static XnBool g_bAvailable = FALSE;
//---------------------------------------------------------------------------
// Code
//---------------------------------------------------------------------------
static void Init()
{
// NOTE: we load dbghelp dynamically, so that it won't crash if a system doesn't have it
HMODULE hDbg = LoadLibrary("dbghelp.dll");
if (hDbg == NULL)
{
return;
}
SymInitializeProt pSymInitialize = (SymInitializeProt)GetProcAddress(hDbg, "SymInitialize");
SymSetOptionsProt pSymSetOptions = (SymSetOptionsProt)GetProcAddress(hDbg, "SymSetOptions");
if (FALSE == pSymInitialize(GetCurrentProcess(), NULL, TRUE))
{
return;
}
pSymSetOptions(SYMOPT_DEFERRED_LOADS | SYMOPT_UNDNAME);
g_pStackWalk64 = (StackWalk64Prot)GetProcAddress(hDbg, "StackWalk64");
g_pSymFromAddr = (SymFromAddrProt)GetProcAddress(hDbg, "SymFromAddr");
g_pSymFunctionTableAccess64 = (SymFunctionTableAccess64Prot)GetProcAddress(hDbg, "SymFunctionTableAccess64");
g_pSymGetModuleBase64 = (SymGetModuleBase64Prot)GetProcAddress(hDbg, "SymGetModuleBase64");
g_bAvailable =
(g_pStackWalk64 != NULL) &&
(g_pSymFromAddr != NULL) &&
(g_pSymFunctionTableAccess64 != NULL) &&
(g_pSymGetModuleBase64 != NULL);
}
XN_C_API XnStatus xnOSGetCurrentCallStack(XnUInt32 nFramesToSkip, XnChar** astrFrames, XnUInt32 nMaxNameLength, XnUInt32* pnFrames)
{
if (*pnFrames == 0 || nMaxNameLength == 0)
{
return XN_STATUS_OK;
}
// Init
if (!g_bInitialized)
{
Init();
g_bInitialized = TRUE;
}
if (!g_bAvailable)
{
xnOSStrNCopy(astrFrames[0], "dbghelp.dll unavailable!", nMaxNameLength-1, nMaxNameLength);
return XN_STATUS_ERROR;
}
// Get context
CONTEXT context;
RtlCaptureContext(&context);
// init STACKFRAME for first call - Fill data according to processor (see WalkTrace64 and STACKFRAME64 documentation)
STACKFRAME64 stackFrame;
memset(&stackFrame, 0, sizeof(stackFrame));
DWORD MachineType;
#ifdef _M_IX86
MachineType = IMAGE_FILE_MACHINE_I386;
stackFrame.AddrPC.Offset = context.Eip;
stackFrame.AddrPC.Mode = AddrModeFlat;
stackFrame.AddrFrame.Offset = context.Ebp;
stackFrame.AddrFrame.Mode = AddrModeFlat;
stackFrame.AddrStack.Offset = context.Esp;
stackFrame.AddrStack.Mode = AddrModeFlat;
#elif _M_X64
MachineType = IMAGE_FILE_MACHINE_AMD64;
stackFrame.AddrPC.Offset = context.Rip;
stackFrame.AddrPC.Mode = AddrModeFlat;
stackFrame.AddrFrame.Offset = context.Rsp;
stackFrame.AddrFrame.Mode = AddrModeFlat;
stackFrame.AddrStack.Offset = context.Rsp;
stackFrame.AddrStack.Mode = AddrModeFlat;
#elif _M_IA64
MachineType = IMAGE_FILE_MACHINE_IA64;
stackFrame.AddrPC.Offset = context.StIIP;
stackFrame.AddrPC.Mode = AddrModeFlat;
stackFrame.AddrFrame.Offset = context.IntSp;
stackFrame.AddrFrame.Mode = AddrModeFlat;
stackFrame.AddrBStore.Offset = context.RsBSP;
stackFrame.AddrBStore.Mode = AddrModeFlat;
stackFrame.AddrStack.Offset = context.IntSp;
stackFrame.AddrStack.Mode = AddrModeFlat;
#else
#error "Platform not supported!"
#endif
XnUInt32 nFrames = 0;
XnUInt32 iFrame = 0;
const XnUInt32 BUFFER_SIZE = 1024;
XnChar symbolBuffer[BUFFER_SIZE];
SYMBOL_INFO* pSymbolInfo = (SYMBOL_INFO*)symbolBuffer;
pSymbolInfo->SizeOfStruct = sizeof(SYMBOL_INFO);
pSymbolInfo->MaxNameLen = BUFFER_SIZE - sizeof(SYMBOL_INFO) - 1;
while (iFrame < *pnFrames)
{
// walk the stack
if (!g_pStackWalk64(MachineType, GetCurrentProcess(), GetCurrentThread(), &stackFrame, &context, NULL, g_pSymFunctionTableAccess64, g_pSymGetModuleBase64, NULL))
{
// probably reached end
break;
}
if (nFrames >= nFramesToSkip)
{
// resolve function name
XnUInt32 nWritten;
if (g_pSymFromAddr(GetCurrentProcess(), stackFrame.AddrPC.Offset, NULL, pSymbolInfo))
{
xnOSStrFormat(astrFrames[iFrame], nMaxNameLength, &nWritten, "%s()", pSymbolInfo->Name);
}
else
{
xnOSStrFormat(astrFrames[iFrame], nMaxNameLength, &nWritten, "0x%x", stackFrame.AddrPC.Offset);
}
++iFrame;
}
++nFrames;
}
*pnFrames = iFrame;
return XN_STATUS_OK;
}
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