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#define WIN32_LEAN_AND_MEAN
#ifndef _CRT_SECURE_NO_WARNINGS
#define _CRT_SECURE_NO_WARNINGS
#endif
#include <assert.h>
#include <windows.h>
#include <tchar.h>
#include <stdio.h>
#include <malloc.h>
#include "../../MemoryModule.h"
typedef int (*addNumberProc)(int, int);
#ifdef _WIN64
typedef void (*throwExceptionProc)(void);
#endif
#define DLL_FILE TEXT("..\\SampleDLL\\SampleDLL.dll")
void LoadFromFile(void)
{
addNumberProc addNumber;
#ifdef _WIN64
throwExceptionProc throwException;
#endif
HRSRC resourceInfo;
DWORD resourceSize;
LPVOID resourceData;
TCHAR buffer[100];
HINSTANCE handle = LoadLibrary(DLL_FILE);
if (handle == NULL)
return;
addNumber = (addNumberProc)GetProcAddress(handle, "addNumbers");
_tprintf(_T("From file: %d\n"), addNumber(1, 2));
resourceInfo = FindResource(handle, MAKEINTRESOURCE(VS_VERSION_INFO), RT_VERSION);
_tprintf(_T("FindResource returned 0x%p\n"), resourceInfo);
resourceSize = SizeofResource(handle, resourceInfo);
resourceData = LoadResource(handle, resourceInfo);
_tprintf(_T("Resource data: %ld bytes at 0x%p\n"), resourceSize, resourceData);
LoadString(handle, 1, buffer, sizeof(buffer));
_tprintf(_T("String1: %s\n"), buffer);
LoadString(handle, 20, buffer, sizeof(buffer));
_tprintf(_T("String2: %s\n"), buffer);
#ifdef _WIN64
throwException = (throwExceptionProc)GetProcAddress(handle, "throwException");
if (!throwException) {
_tprintf(_T("GetProcAddress(\"throwException\") returned NULL\n"));
} else {
try {
throwException();
_tprintf(_T("Should have caught exception.\n"));
} catch (int e) {
if (e != 42) {
_tprintf(_T("Should have caught exception 42, got %d instead\n"), e);
} else {
_tprintf(_T("Caught exception %d\n"), e);
}
}
}
#endif
FreeLibrary(handle);
}
void* ReadLibrary(size_t* pSize) {
size_t read;
void* result;
FILE* fp;
fp = _tfopen(DLL_FILE, _T("rb"));
if (fp == NULL)
{
_tprintf(_T("Can't open DLL file \"%s\"."), DLL_FILE);
return NULL;
}
fseek(fp, 0, SEEK_END);
*pSize = static_cast<size_t>(ftell(fp));
if (*pSize == 0)
{
fclose(fp);
return NULL;
}
result = (unsigned char *)malloc(*pSize);
if (result == NULL)
{
return NULL;
}
fseek(fp, 0, SEEK_SET);
read = fread(result, 1, *pSize, fp);
fclose(fp);
if (read != *pSize)
{
free(result);
return NULL;
}
return result;
}
void LoadFromMemory(void)
{
void *data;
size_t size;
HMEMORYMODULE handle;
addNumberProc addNumber;
#ifdef _WIN64
throwExceptionProc throwException;
#endif
HMEMORYRSRC resourceInfo;
DWORD resourceSize;
LPVOID resourceData;
TCHAR buffer[100];
data = ReadLibrary(&size);
if (data == NULL)
{
return;
}
handle = MemoryLoadLibrary(data, size);
if (handle == NULL)
{
_tprintf(_T("Can't load library from memory.\n"));
goto exit;
}
addNumber = (addNumberProc)MemoryGetProcAddress(handle, "addNumbers");
_tprintf(_T("From memory: %d\n"), addNumber(1, 2));
resourceInfo = MemoryFindResource(handle, MAKEINTRESOURCE(VS_VERSION_INFO), RT_VERSION);
_tprintf(_T("MemoryFindResource returned 0x%p\n"), resourceInfo);
resourceSize = MemorySizeofResource(handle, resourceInfo);
resourceData = MemoryLoadResource(handle, resourceInfo);
_tprintf(_T("Memory resource data: %ld bytes at 0x%p\n"), resourceSize, resourceData);
MemoryLoadString(handle, 1, buffer, sizeof(buffer));
_tprintf(_T("String1: %s\n"), buffer);
MemoryLoadString(handle, 20, buffer, sizeof(buffer));
_tprintf(_T("String2: %s\n"), buffer);
#ifdef _WIN64
throwException = (throwExceptionProc)MemoryGetProcAddress(handle, "throwException");
if (!throwException) {
_tprintf(_T("MemoryGetProcAddress(\"throwException\") returned NULL\n"));
} else {
try {
throwException();
_tprintf(_T("Should have caught exception.\n"));
} catch (int e) {
if (e != 42) {
_tprintf(_T("Should have caught exception 42, got %d instead\n"), e);
} else {
_tprintf(_T("Caught exception %d\n"), e);
}
}
}
#endif
MemoryFreeLibrary(handle);
exit:
free(data);
}
#define MAX_CALLS 20
struct CallList {
int current_alloc_call, current_free_call;
CustomAllocFunc alloc_calls[MAX_CALLS];
CustomFreeFunc free_calls[MAX_CALLS];
};
LPVOID MemoryFailingAlloc(LPVOID address, SIZE_T size, DWORD allocationType, DWORD protect, void* userdata)
{
UNREFERENCED_PARAMETER(address);
UNREFERENCED_PARAMETER(size);
UNREFERENCED_PARAMETER(allocationType);
UNREFERENCED_PARAMETER(protect);
UNREFERENCED_PARAMETER(userdata);
return NULL;
}
LPVOID MemoryMockAlloc(LPVOID address, SIZE_T size, DWORD allocationType, DWORD protect, void* userdata)
{
CallList* calls = (CallList*)userdata;
CustomAllocFunc current_func = calls->alloc_calls[calls->current_alloc_call++];
assert(current_func != NULL);
return current_func(address, size, allocationType, protect, NULL);
}
BOOL MemoryMockFree(LPVOID lpAddress, SIZE_T dwSize, DWORD dwFreeType, void* userdata)
{
CallList* calls = (CallList*)userdata;
CustomFreeFunc current_func = calls->free_calls[calls->current_free_call++];
assert(current_func != NULL);
return current_func(lpAddress, dwSize, dwFreeType, NULL);
}
void InitFuncs(void** funcs, va_list args) {
for (int i = 0; ; i++) {
assert(i < MAX_CALLS);
funcs[i] = va_arg(args, void*);
if (funcs[i] == NULL) break;
}
}
void InitAllocFuncs(CallList* calls, ...) {
va_list args;
va_start(args, calls);
InitFuncs((void**)calls->alloc_calls, args);
va_end(args);
calls->current_alloc_call = 0;
}
void InitFreeFuncs(CallList* calls, ...) {
va_list args;
va_start(args, calls);
InitFuncs((void**)calls->free_calls, args);
va_end(args);
calls->current_free_call = 0;
}
void InitFreeFunc(CallList* calls, CustomFreeFunc freeFunc) {
for (int i = 0; i < MAX_CALLS; i++) {
calls->free_calls[i] = freeFunc;
}
calls->current_free_call = 0;
}
void TestFailingAllocation(void *data, size_t size) {
CallList expected_calls;
HMEMORYMODULE handle;
InitAllocFuncs(&expected_calls, MemoryFailingAlloc, MemoryFailingAlloc, NULL);
InitFreeFuncs(&expected_calls, NULL);
handle = MemoryLoadLibraryEx(
data, size, MemoryMockAlloc, MemoryMockFree, MemoryDefaultLoadLibrary,
MemoryDefaultGetProcAddress, MemoryDefaultFreeLibrary, &expected_calls);
assert(handle == NULL);
assert(GetLastError() == ERROR_OUTOFMEMORY);
assert(expected_calls.current_free_call == 0);
MemoryFreeLibrary(handle);
assert(expected_calls.current_free_call == 0);
}
void TestCleanupAfterFailingAllocation(void *data, size_t size) {
CallList expected_calls;
HMEMORYMODULE handle;
int free_calls_after_loading;
InitAllocFuncs(&expected_calls,
MemoryDefaultAlloc,
MemoryDefaultAlloc,
MemoryDefaultAlloc,
MemoryDefaultAlloc,
MemoryFailingAlloc,
NULL);
InitFreeFuncs(&expected_calls, MemoryDefaultFree, NULL);
handle = MemoryLoadLibraryEx(
data, size, MemoryMockAlloc, MemoryMockFree, MemoryDefaultLoadLibrary,
MemoryDefaultGetProcAddress, MemoryDefaultFreeLibrary, &expected_calls);
free_calls_after_loading = expected_calls.current_free_call;
MemoryFreeLibrary(handle);
assert(expected_calls.current_free_call == free_calls_after_loading);
}
void TestFreeAfterDefaultAlloc(void *data, size_t size) {
CallList expected_calls;
HMEMORYMODULE handle;
int free_calls_after_loading;
// Note: free might get called internally multiple times
InitFreeFunc(&expected_calls, MemoryDefaultFree);
handle = MemoryLoadLibraryEx(
data, size, MemoryDefaultAlloc, MemoryMockFree, MemoryDefaultLoadLibrary,
MemoryDefaultGetProcAddress, MemoryDefaultFreeLibrary, &expected_calls);
assert(handle != NULL);
free_calls_after_loading = expected_calls.current_free_call;
MemoryFreeLibrary(handle);
assert(expected_calls.current_free_call == free_calls_after_loading + 1);
}
#ifdef _WIN64
LPVOID MemoryAllocHigh(LPVOID address, SIZE_T size, DWORD allocationType, DWORD protect, void* userdata)
{
int* counter = static_cast<int*>(userdata);
if (*counter == 0) {
// Make sure the image gets loaded to an address above 32bit.
uintptr_t offset = 0x10000000000;
address = (LPVOID) ((uintptr_t) address + offset);
}
(*counter)++;
return MemoryDefaultAlloc(address, size, allocationType, protect, NULL);
}
void TestAllocHighMemory(void *data, size_t size) {
HMEMORYMODULE handle;
int counter = 0;
addNumberProc addNumber;
HMEMORYRSRC resourceInfo;
DWORD resourceSize;
LPVOID resourceData;
TCHAR buffer[100];
handle = MemoryLoadLibraryEx(
data, size, MemoryAllocHigh, MemoryDefaultFree, MemoryDefaultLoadLibrary,
MemoryDefaultGetProcAddress, MemoryDefaultFreeLibrary, &counter);
assert(handle != NULL);
addNumber = (addNumberProc)MemoryGetProcAddress(handle, "addNumbers");
_tprintf(_T("From memory: %d\n"), addNumber(1, 2));
resourceInfo = MemoryFindResource(handle, MAKEINTRESOURCE(VS_VERSION_INFO), RT_VERSION);
_tprintf(_T("MemoryFindResource returned 0x%p\n"), resourceInfo);
resourceSize = MemorySizeofResource(handle, resourceInfo);
resourceData = MemoryLoadResource(handle, resourceInfo);
_tprintf(_T("Memory resource data: %ld bytes at 0x%p\n"), resourceSize, resourceData);
MemoryLoadString(handle, 1, buffer, sizeof(buffer));
_tprintf(_T("String1: %s\n"), buffer);
MemoryLoadString(handle, 20, buffer, sizeof(buffer));
_tprintf(_T("String2: %s\n"), buffer);
MemoryFreeLibrary(handle);
}
#endif // _WIN64
void TestCustomAllocAndFree(void)
{
void *data;
size_t size;
data = ReadLibrary(&size);
if (data == NULL)
{
return;
}
_tprintf(_T("Test MemoryLoadLibraryEx after initially failing allocation function\n"));
TestFailingAllocation(data, size);
_tprintf(_T("Test cleanup after MemoryLoadLibraryEx with failing allocation function\n"));
TestCleanupAfterFailingAllocation(data, size);
_tprintf(_T("Test custom free function after MemoryLoadLibraryEx\n"));
TestFreeAfterDefaultAlloc(data, size);
#ifdef _WIN64
_tprintf(_T("Test allocating in high memory\n"));
TestAllocHighMemory(data, size);
#endif
free(data);
}
int main()
{
LoadFromFile();
printf("\n\n");
LoadFromMemory();
printf("\n\n");
TestCustomAllocAndFree();
return 0;
}
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