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pjs/xpcom/base/nsDebugHelpWin32.cpp

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14 KiB
C++
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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: NPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Netscape Public License
* Version 1.1 (the "License"); you may not use this file except in
* compliance with the License. You may obtain a copy of the License at
* http://www.mozilla.org/NPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* John Bandhauer <jband@netscape.com>
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the NPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the NPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
/* Win32 x86 code for stack walking, symbol resolution, and function hooking */
#if defined(_WIN32) && defined(_M_IX86)
// This is the .cpp file where the globals live
#define DHW_IMPLEMENT_GLOBALS
#include <stdio.h>
#include "prtypes.h"
#include "prprf.h"
#include "prlog.h"
#include "plstr.h"
#include "prlock.h"
#include "nscore.h"
#include "nsAutoLock.h"
#include "nsDebugHelpWin32.h"
#else
#error "nsDebugHelpWin32.cpp should only be built in Win32 x86 builds"
#endif
PRBool
dhwEnsureImageHlpInitialized()
{
static PRBool gInitialized = PR_FALSE;
static PRBool gTried = PR_FALSE;
if (!gInitialized && !gTried) {
gTried = PR_TRUE;
HMODULE module = ::LoadLibrary("DBGHELP.DLL");
if (!module) {
DWORD dw = GetLastError();
printf("DumpStack Error: DBGHELP.DLL wasn't found. "
"GetLastError() returned 0x%8.8X\n", dw);
return PR_FALSE;
}
#define INIT_PROC(typename_, name_) \
dhw##name_ = (typename_) ::GetProcAddress(module, #name_); \
if(!dhw##name_) return PR_FALSE;
INIT_PROC(SYMINITIALIZEPROC, SymInitialize);
INIT_PROC(SYMSETOPTIONS, SymSetOptions);
INIT_PROC(SYMGETOPTIONS, SymGetOptions);
INIT_PROC(SYMGETMODULEINFO, SymGetModuleInfo);
INIT_PROC(SYMGETSYMFROMADDRPROC, SymGetSymFromAddr);
INIT_PROC(ENUMERATELOADEDMODULES, EnumerateLoadedModules);
INIT_PROC(IMAGEDIRECTORYENTRYTODATA, ImageDirectoryEntryToData);
// INIT_PROC(SYMGETLINEFROMADDR, SymGetLineFromAddr);
// INIT_PROC(SYMCLEANUPPROC, SymCleanup);
// INIT_PROC(STACKWALKPROC, StackWalk);
// INIT_PROC(SYMFUNCTIONTABLEACCESSPROC, SymFunctionTableAccess);
// INIT_PROC(SYMGETMODULEBASEPROC, SymGetModuleBase);
// INIT_PROC(SYMLOADMODULE, SymLoadModule);
// INIT_PROC(UNDECORATESYMBOLNAME, UnDecorateSymbolName);
// INIT_PROC(SYMUNDNAME, SymUnDName);
#undef INIT_PROC
gInitialized = PR_TRUE;
}
return gInitialized;
}
PRBool
dhwEnsureSymInitialized()
{
static PRBool gInitialized = PR_FALSE;
if (! gInitialized) {
if (! dhwEnsureImageHlpInitialized())
return PR_FALSE;
// dhwSymSetOptions(SYMOPT_LOAD_LINES | SYMOPT_UNDNAME);
dhwSymSetOptions(SYMOPT_UNDNAME);
if (! dhwSymInitialize(::GetCurrentProcess(), NULL, TRUE))
return PR_FALSE;
gInitialized = PR_TRUE;
}
return gInitialized;
}
/***************************************************************************/
PRLock* DHWImportHooker::gLock = nsnull;
DHWImportHooker* DHWImportHooker::gHooks = nsnull;
GETPROCADDRESS DHWImportHooker::gRealGetProcAddress = nsnull;
DHWImportHooker&
DHWImportHooker::getGetProcAddressHooker()
{
static DHWImportHooker gGetProcAddress("Kernel32.dll", "GetProcAddress",
(PROC)DHWImportHooker::GetProcAddress);
return gGetProcAddress;
}
DHWImportHooker&
DHWImportHooker::getLoadLibraryWHooker()
{
static DHWImportHooker gLoadLibraryW("Kernel32.dll", "LoadLibraryW",
(PROC)DHWImportHooker::LoadLibraryW);
return gLoadLibraryW;
}
DHWImportHooker&
DHWImportHooker::getLoadLibraryExWHooker()
{
static DHWImportHooker gLoadLibraryExW("Kernel32.dll", "LoadLibraryExW",
(PROC)DHWImportHooker::LoadLibraryExW);
return gLoadLibraryExW;
}
DHWImportHooker&
DHWImportHooker::getLoadLibraryAHooker()
{
static DHWImportHooker gLoadLibraryA("Kernel32.dll", "LoadLibraryA",
(PROC)DHWImportHooker::LoadLibraryA);
return gLoadLibraryA;
}
DHWImportHooker&
DHWImportHooker::getLoadLibraryExAHooker()
{
static DHWImportHooker gLoadLibraryExA("Kernel32.dll", "LoadLibraryExA",
(PROC)DHWImportHooker::LoadLibraryExA);
return gLoadLibraryExA;
}
static HMODULE ThisModule()
{
MEMORY_BASIC_INFORMATION info;
return VirtualQuery(ThisModule, &info, sizeof(info)) ?
(HMODULE) info.AllocationBase : nsnull;
}
DHWImportHooker::DHWImportHooker(const char* aModuleName,
const char* aFunctionName,
PROC aHook,
PRBool aExcludeOurModule /* = PR_FALSE */)
: mNext(nsnull),
mModuleName(aModuleName),
mFunctionName(aFunctionName),
mOriginal(nsnull),
mHook(aHook),
mIgnoreModule(aExcludeOurModule ? ThisModule() : nsnull),
mHooking(PR_TRUE)
{
printf("DHWImportHooker hooking %s, function %s\n",aModuleName, aFunctionName);
if(!gLock)
gLock = PR_NewLock();
nsAutoLock lock(gLock);
dhwEnsureImageHlpInitialized();
if(!gRealGetProcAddress)
gRealGetProcAddress = ::GetProcAddress;
mOriginal = gRealGetProcAddress(::GetModuleHandleA(aModuleName),
aFunctionName),
mNext = gHooks;
gHooks = this;
PatchAllModules();
}
DHWImportHooker::~DHWImportHooker()
{
nsAutoLock lock(gLock);
mHooking = PR_FALSE;
PatchAllModules();
if(gHooks == this)
gHooks = mNext;
else
{
for(DHWImportHooker* cur = gHooks; cur; cur = cur->mNext)
{
if(cur->mNext == this)
{
cur->mNext = mNext;
break;
}
}
NS_ASSERTION(cur, "we were not in the list!");
}
if(!gHooks)
{
PRLock* theLock = gLock;
gLock = nsnull;
lock.unlock();
PR_DestroyLock(theLock);
}
}
static BOOL CALLBACK ModuleEnumCallback(LPSTR ModuleName,
ULONG ModuleBase,
ULONG ModuleSize,
PVOID UserContext)
{
//printf("Module Name %s\n",ModuleName);
DHWImportHooker* self = (DHWImportHooker*) UserContext;
HMODULE aModule = (HMODULE) ModuleBase;
return self->PatchOneModule(aModule, ModuleName);
}
PRBool
DHWImportHooker::PatchAllModules()
{
return dhwEnumerateLoadedModules(::GetCurrentProcess(),
ModuleEnumCallback, this);
}
PRBool
DHWImportHooker::PatchOneModule(HMODULE aModule, const char* name)
{
if(aModule == mIgnoreModule)
{
return PR_TRUE;
}
// do the fun stuff...
PIMAGE_IMPORT_DESCRIPTOR desc;
uint32 size;
desc = (PIMAGE_IMPORT_DESCRIPTOR)
dhwImageDirectoryEntryToData(aModule, PR_TRUE,
IMAGE_DIRECTORY_ENTRY_IMPORT, &size);
if(!desc)
{
return PR_TRUE;
}
for(; desc->Name; desc++)
{
const char* entryModuleName = (const char*)
((char*)aModule + desc->Name);
if(!lstrcmpi(entryModuleName, mModuleName))
break;
}
if(!desc->Name)
{
return PR_TRUE;
}
PIMAGE_THUNK_DATA thunk = (PIMAGE_THUNK_DATA)
((char*) aModule + desc->FirstThunk);
for(; thunk->u1.Function; thunk++)
{
PROC original;
PROC replacement;
if(mHooking)
{
original = mOriginal;
replacement = mHook;
}
else
{
original = mHook;
replacement = mOriginal;
}
PROC* ppfn = (PROC*) &thunk->u1.Function;
if(*ppfn == original)
{
DWORD dwDummy;
VirtualProtect(ppfn, sizeof(ppfn), PAGE_EXECUTE_READWRITE, &dwDummy);
BOOL result = WriteProcessMemory(GetCurrentProcess(),
ppfn, &replacement, sizeof(replacement), nsnull);
if (!result) //failure
{
printf("failure name %s func %x\n",name,*ppfn);
DWORD error = GetLastError();
return PR_TRUE;
}
else
{
printf("success name %s func %x\n",name,*ppfn);
DWORD filler = result+1;
return result;
}
}
}
return PR_TRUE;
}
PRBool
DHWImportHooker::ModuleLoaded(HMODULE aModule, DWORD flags)
{
printf("ModuleLoaded\n");
if(aModule && !(flags & LOAD_LIBRARY_AS_DATAFILE))
{
nsAutoLock lock(gLock);
// We don't know that the newly loaded module didn't drag in implicitly
// linked modules, so we patch everything in sight.
for(DHWImportHooker* cur = gHooks; cur; cur = cur->mNext)
cur->PatchAllModules();
}
return PR_TRUE;
}
// static
HMODULE WINAPI
DHWImportHooker::LoadLibraryW(PCWSTR path)
{
wprintf(L"LoadLibraryW %s\n",path);
DHW_DECLARE_FUN_TYPE(HMODULE, __stdcall, LOADLIBRARYW_, (PCWSTR));
HMODULE hmod = DHW_ORIGINAL(LOADLIBRARYW_, getLoadLibraryWHooker())(path);
ModuleLoaded(hmod, 0);
return hmod;
}
// static
HMODULE WINAPI
DHWImportHooker::LoadLibraryExW(PCWSTR path, HANDLE file, DWORD flags)
{
wprintf(L"LoadLibraryExW %s\n",path);
DHW_DECLARE_FUN_TYPE(HMODULE, __stdcall, LOADLIBRARYEXW_, (PCWSTR, HANDLE, DWORD));
HMODULE hmod = DHW_ORIGINAL(LOADLIBRARYEXW_, getLoadLibraryExWHooker())(path, file, flags);
ModuleLoaded(hmod, flags);
return hmod;
}
// static
HMODULE WINAPI
DHWImportHooker::LoadLibraryA(PCSTR path)
{
printf("LoadLibraryA %s\n",path);
DHW_DECLARE_FUN_TYPE(HMODULE, __stdcall, LOADLIBRARYA_, (PCSTR));
HMODULE hmod = DHW_ORIGINAL(LOADLIBRARYA_, getLoadLibraryAHooker())(path);
ModuleLoaded(hmod, 0);
return hmod;
}
// static
HMODULE WINAPI
DHWImportHooker::LoadLibraryExA(PCSTR path, HANDLE file, DWORD flags)
{
printf("LoadLibraryExA %s\n",path);
DHW_DECLARE_FUN_TYPE(HMODULE, __stdcall, LOADLIBRARYEXA_, (PCSTR, HANDLE, DWORD));
HMODULE hmod = DHW_ORIGINAL(LOADLIBRARYEXA_, getLoadLibraryExAHooker())(path, file, flags);
ModuleLoaded(hmod, flags);
return hmod;
}
// static
FARPROC WINAPI
DHWImportHooker::GetProcAddress(HMODULE aModule, PCSTR aFunctionName)
{
FARPROC pfn = gRealGetProcAddress(aModule, aFunctionName);
if(pfn)
{
nsAutoLock lock(gLock);
for(DHWImportHooker* cur = gHooks; cur; cur = cur->mNext)
{
if(pfn == cur->mOriginal)
{
pfn = cur->mHook;
break;
}
}
}
return pfn;
}
/***************************************************************************/
#if 0
static _CRT_ALLOC_HOOK defaultDbgAllocHook = nsnull;
static DHWAllocationSizeDebugHook* gAllocationSizeHook = nsnull;
int __cdecl dhw_DbgAllocHook(int nAllocType, void *pvData,
size_t nSize, int nBlockUse, long lRequest,
const unsigned char * szFileName, int nLine )
{
DHWAllocationSizeDebugHook* hook = gAllocationSizeHook;
if(hook)
{
PRBool res;
_CrtSetAllocHook(defaultDbgAllocHook);
switch(nAllocType)
{
case _HOOK_ALLOC:
res = hook->AllocHook(nSize);
break;
case _HOOK_REALLOC:
res = hook->ReallocHook(nSize, pvData ?
_msize_dbg(pvData, nBlockUse) : 0);
break;
case _HOOK_FREE:
res = hook->FreeHook(pvData ?
_msize_dbg(pvData, nBlockUse) : 0);
break;
default:
NS_ASSERTION(0,"huh?");
res = PR_TRUE;
break;
}
_CrtSetAllocHook(dhw_DbgAllocHook);
return (int) res;
}
return 1;
}
PRBool
dhwSetAllocationSizeDebugHook(DHWAllocationSizeDebugHook* hook)
{
if(!hook || gAllocationSizeHook)
return PR_FALSE;
gAllocationSizeHook = hook;
if(!defaultDbgAllocHook)
defaultDbgAllocHook = _CrtSetAllocHook(dhw_DbgAllocHook);
else
_CrtSetAllocHook(dhw_DbgAllocHook);
return PR_TRUE;
}
PRBool
dhwClearAllocationSizeDebugHook()
{
if(!gAllocationSizeHook)
return PR_FALSE;
gAllocationSizeHook = nsnull;
_CrtSetAllocHook(defaultDbgAllocHook);
return PR_TRUE;
}
#endif //0
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