mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
synced 2024-09-13 09:24:08 -07:00
373 lines
9.9 KiB
C++
373 lines
9.9 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#if defined(_WIN32) && (defined(_M_IX86) || defined(_M_X64))
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// This is the .cpp file where the globals live
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#define DHW_IMPLEMENT_GLOBALS
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#include <stdio.h>
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#include "prprf.h"
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#include "prlog.h"
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#include "plstr.h"
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#include "prlock.h"
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#include "nscore.h"
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#include "nsDebugHelpWin32.h"
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#else
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#error "nsDebugHelpWin32.cpp should only be built in Win32 x86/x64 builds"
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#endif
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/***************************************************************************/
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PRLock* DHWImportHooker::gLock = nullptr;
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DHWImportHooker* DHWImportHooker::gHooks = nullptr;
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decltype(GetProcAddress)* DHWImportHooker::gRealGetProcAddress = nullptr;
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static bool
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dhwEnsureImageHlpInitialized()
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{
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static bool gInitialized = false;
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static bool gTried = false;
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if (!gInitialized && !gTried) {
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gTried = true;
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HMODULE module = ::LoadLibrary("DBGHELP.DLL");
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if (!module) {
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DWORD dw = GetLastError();
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printf("DumpStack Error: DBGHELP.DLL wasn't found. GetLastError() returned 0x%8.8X\n"
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" This DLL is needed for succeessfully implementing trace-malloc.\n"
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" This dll ships by default on Win2k. Disabling trace-malloc functionality.\n"
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, dw);
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return false;
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}
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#define INIT_PROC(typename_, name_) \
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dhw##name_ = (decltype(name_)*) ::GetProcAddress(module, #name_); \
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if(!dhw##name_) return false;
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#ifdef _WIN64
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INIT_PROC(ENUMERATELOADEDMODULES64, EnumerateLoadedModules64);
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#else
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INIT_PROC(ENUMERATELOADEDMODULES, EnumerateLoadedModules);
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#endif
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INIT_PROC(IMAGEDIRECTORYENTRYTODATA, ImageDirectoryEntryToData);
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#undef INIT_PROC
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gInitialized = true;
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}
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return gInitialized;
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}
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DHWImportHooker&
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DHWImportHooker::getGetProcAddressHooker()
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{
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static DHWImportHooker gGetProcAddress("Kernel32.dll", "GetProcAddress",
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(PROC)DHWImportHooker::GetProcAddress);
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return gGetProcAddress;
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}
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DHWImportHooker&
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DHWImportHooker::getLoadLibraryWHooker()
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{
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static DHWImportHooker gLoadLibraryW("Kernel32.dll", "LoadLibraryW",
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(PROC)DHWImportHooker::LoadLibraryW);
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return gLoadLibraryW;
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}
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DHWImportHooker&
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DHWImportHooker::getLoadLibraryExWHooker()
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{
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static DHWImportHooker gLoadLibraryExW("Kernel32.dll", "LoadLibraryExW",
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(PROC)DHWImportHooker::LoadLibraryExW);
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return gLoadLibraryExW;
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}
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DHWImportHooker&
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DHWImportHooker::getLoadLibraryAHooker()
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{
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static DHWImportHooker gLoadLibraryA("Kernel32.dll", "LoadLibraryA",
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(PROC)DHWImportHooker::LoadLibraryA);
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return gLoadLibraryA;
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}
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DHWImportHooker&
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DHWImportHooker::getLoadLibraryExAHooker()
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{
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static DHWImportHooker gLoadLibraryExA("Kernel32.dll", "LoadLibraryExA",
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(PROC)DHWImportHooker::LoadLibraryExA);
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return gLoadLibraryExA;
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}
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static HMODULE ThisModule()
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{
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MEMORY_BASIC_INFORMATION info;
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return VirtualQuery(ThisModule, &info, sizeof(info)) ?
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(HMODULE) info.AllocationBase : nullptr;
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}
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DHWImportHooker::DHWImportHooker(const char* aModuleName,
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const char* aFunctionName,
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PROC aHook,
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bool aExcludeOurModule /* = false */)
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: mNext(nullptr),
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mModuleName(aModuleName),
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mFunctionName(aFunctionName),
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mOriginal(nullptr),
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mHook(aHook),
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mIgnoreModule(aExcludeOurModule ? ThisModule() : nullptr),
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mHooking(true)
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{
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//printf("DHWImportHooker hooking %s, function %s\n",aModuleName, aFunctionName);
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if(!gLock)
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gLock = PR_NewLock();
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PR_Lock(gLock);
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dhwEnsureImageHlpInitialized(); // for the extra ones we care about.
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if(!gRealGetProcAddress)
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gRealGetProcAddress = ::GetProcAddress;
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mOriginal = gRealGetProcAddress(::GetModuleHandleA(aModuleName),
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aFunctionName),
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mNext = gHooks;
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gHooks = this;
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PatchAllModules();
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PR_Unlock(gLock);
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}
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DHWImportHooker::~DHWImportHooker()
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{
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PR_Lock(gLock);
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mHooking = false;
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PatchAllModules();
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for (DHWImportHooker **cur = &gHooks;
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(PR_ASSERT(*cur), *cur); /* assert that we find this */
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cur = &(*cur)->mNext)
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{
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if (*cur == this)
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{
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*cur = mNext;
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break;
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}
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}
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if(!gHooks)
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{
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PRLock* theLock = gLock;
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gLock = nullptr;
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PR_Unlock(theLock);
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PR_DestroyLock(theLock);
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}
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if (gLock)
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PR_Unlock(gLock);
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}
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#ifdef _WIN64
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static BOOL CALLBACK ModuleEnumCallback(PCSTR ModuleName,
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DWORD64 ModuleBase,
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ULONG ModuleSize,
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PVOID UserContext)
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#else
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static BOOL CALLBACK ModuleEnumCallback(PCSTR ModuleName,
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ULONG ModuleBase,
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ULONG ModuleSize,
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PVOID UserContext)
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#endif
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{
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//printf("Module Name %s\n",ModuleName);
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DHWImportHooker* self = (DHWImportHooker*) UserContext;
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HMODULE aModule = (HMODULE) ModuleBase;
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return self->PatchOneModule(aModule, ModuleName);
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}
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bool
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DHWImportHooker::PatchAllModules()
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{
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// Need to cast to PENUMLOADED_MODULES_CALLBACK because the
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// constness of the first parameter of PENUMLOADED_MODULES_CALLBACK
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// varies over SDK versions (from non-const to const over time).
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// See bug 391848 and bug 415426.
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#ifdef _WIN64
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return dhwEnumerateLoadedModules64(::GetCurrentProcess(),
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(PENUMLOADED_MODULES_CALLBACK64)ModuleEnumCallback, this);
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#else
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return dhwEnumerateLoadedModules(::GetCurrentProcess(),
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(PENUMLOADED_MODULES_CALLBACK)ModuleEnumCallback, this);
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#endif
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}
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bool
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DHWImportHooker::PatchOneModule(HMODULE aModule, const char* name)
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{
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if(aModule == mIgnoreModule)
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{
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return true;
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}
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// do the fun stuff...
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PIMAGE_IMPORT_DESCRIPTOR desc;
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ULONG size;
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desc = (PIMAGE_IMPORT_DESCRIPTOR)
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dhwImageDirectoryEntryToData(aModule, true,
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IMAGE_DIRECTORY_ENTRY_IMPORT, &size);
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if(!desc)
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{
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return true;
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}
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for(; desc->Name; desc++)
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{
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const char* entryModuleName = (const char*)
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((char*)aModule + desc->Name);
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if(!lstrcmpi(entryModuleName, mModuleName))
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break;
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}
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if(!desc->Name)
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{
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return true;
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}
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PIMAGE_THUNK_DATA thunk = (PIMAGE_THUNK_DATA)
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((char*) aModule + desc->FirstThunk);
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for(; thunk->u1.Function; thunk++)
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{
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PROC original;
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PROC replacement;
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if(mHooking)
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{
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original = mOriginal;
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replacement = mHook;
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}
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else
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{
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original = mHook;
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replacement = mOriginal;
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}
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PROC* ppfn = (PROC*) &thunk->u1.Function;
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if(*ppfn == original)
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{
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DWORD dwDummy;
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VirtualProtect(ppfn, sizeof(ppfn), PAGE_EXECUTE_READWRITE, &dwDummy);
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BOOL result = WriteProcessMemory(GetCurrentProcess(),
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ppfn, &replacement, sizeof(replacement), nullptr);
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if (!result) //failure
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{
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printf("failure name %s func %x\n",name,*ppfn);
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DWORD error = GetLastError();
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return true;
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}
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else
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{
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// printf("success name %s func %x\n",name,*ppfn);
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DWORD filler = result+1;
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return result;
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}
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}
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}
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return true;
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}
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bool
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DHWImportHooker::ModuleLoaded(HMODULE aModule, DWORD flags)
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{
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//printf("ModuleLoaded\n");
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if(aModule && !(flags & LOAD_LIBRARY_AS_DATAFILE))
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{
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PR_Lock(gLock);
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// We don't know that the newly loaded module didn't drag in implicitly
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// linked modules, so we patch everything in sight.
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for(DHWImportHooker* cur = gHooks; cur; cur = cur->mNext)
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cur->PatchAllModules();
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PR_Unlock(gLock);
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}
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return true;
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}
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// static
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HMODULE WINAPI
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DHWImportHooker::LoadLibraryW(PCWSTR path)
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{
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//wprintf(L"LoadLibraryW %s\n",path);
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HMODULE hmod = DHW_ORIGINAL(::LoadLibraryW, getLoadLibraryWHooker())(path);
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ModuleLoaded(hmod, 0);
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return hmod;
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}
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// static
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HMODULE WINAPI
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DHWImportHooker::LoadLibraryExW(PCWSTR path, HANDLE file, DWORD flags)
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{
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//wprintf(L"LoadLibraryExW %s\n",path);
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HMODULE hmod = DHW_ORIGINAL(::LoadLibraryExW, getLoadLibraryExWHooker())(path, file, flags);
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ModuleLoaded(hmod, flags);
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return hmod;
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}
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// static
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HMODULE WINAPI
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DHWImportHooker::LoadLibraryA(PCSTR path)
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{
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//printf("LoadLibraryA %s\n",path);
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HMODULE hmod = DHW_ORIGINAL(::LoadLibraryA, getLoadLibraryAHooker())(path);
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ModuleLoaded(hmod, 0);
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return hmod;
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}
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// static
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HMODULE WINAPI
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DHWImportHooker::LoadLibraryExA(PCSTR path, HANDLE file, DWORD flags)
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{
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//printf("LoadLibraryExA %s\n",path);
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HMODULE hmod = DHW_ORIGINAL(::LoadLibraryExA, getLoadLibraryExAHooker())(path, file, flags);
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ModuleLoaded(hmod, flags);
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return hmod;
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}
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// static
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FARPROC WINAPI
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DHWImportHooker::GetProcAddress(HMODULE aModule, PCSTR aFunctionName)
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{
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FARPROC pfn = gRealGetProcAddress(aModule, aFunctionName);
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if(pfn)
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{
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PR_Lock(gLock);
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for(DHWImportHooker* cur = gHooks; cur; cur = cur->mNext)
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{
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if(pfn == cur->mOriginal)
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{
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pfn = cur->mHook;
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break;
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}
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}
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PR_Unlock(gLock);
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}
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return pfn;
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}
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