201 lines
6.1 KiB
C
201 lines
6.1 KiB
C
// Windows XP does not have RtlCaptureStackBackTrace. This is an awful workaround.
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// TODO: Reimplement this ourselves so we can print stacks on XP
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#undef _WIN32_WINNT
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#define _WIN32_WINNT 0x0600
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#include <Windows.h>
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#include <dbghelp.h>
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#include "../hooks/files.h"
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void PrintStack(void) {
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unsigned int i;
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void* stack[100];
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unsigned short frames;
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SYMBOL_INFO* symbol;
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HANDLE process;
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process = GetCurrentProcess();
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SymInitialize(process, NULL, TRUE);
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frames = CaptureStackBackTrace(0, 100, stack, NULL);
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symbol = (SYMBOL_INFO*)calloc(sizeof(SYMBOL_INFO) + 256 * sizeof(char), 1);
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symbol->MaxNameLen = 255;
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symbol->SizeOfStruct = sizeof(SYMBOL_INFO);
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for (i = 0; i < frames; i++) {
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SymFromAddr(process, (DWORD64)(stack[i]), 0, symbol);
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printf("%i: %s - 0x%0X\n", frames - i - 1, symbol->Name, (unsigned int)symbol->Address);
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}
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free(symbol);
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}
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BOOL FileExistsW(const wchar_t* szPath) {
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DWORD dwAttrib = _GetFileAttributesW(szPath);
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return (dwAttrib != INVALID_FILE_ATTRIBUTES && !(dwAttrib & FILE_ATTRIBUTE_DIRECTORY));
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}
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BOOL FileExistsA(const char* szPath) {
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wchar_t szPathW[MAX_PATH + 1];
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MultiByteToWideChar(0, 0, szPath, -1, szPathW, _countof(szPathW));
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DWORD dwAttrib = _GetFileAttributesW(szPathW);
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return (dwAttrib != INVALID_FILE_ATTRIBUTES && !(dwAttrib & FILE_ATTRIBUTE_DIRECTORY));
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}
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typedef struct _handle_list {
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HANDLE m_Handle;
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PVOID m_pData;
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DWORD m_Type;
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BOOL m_IsOnHeap;
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struct _handle_list* m_Next;
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} handle_list_t;
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handle_list_t handle_list_root = {
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.m_Handle = INVALID_HANDLE_VALUE,
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.m_pData = NULL,
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.m_Type = 0xffffffff,
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.m_IsOnHeap = FALSE,
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.m_Next = NULL,
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};
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PVOID GetDataForHandle(HANDLE hObject, DWORD type) {
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if (hObject == INVALID_HANDLE_VALUE) return NULL;
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handle_list_t* head = &handle_list_root;
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while (head) {
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if (head->m_Handle == hObject && (type == HDATA_ANY || head->m_Type == type))
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return head->m_pData;
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head = head->m_Next;
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}
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return NULL;
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}
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void SetDataForHandle(HANDLE hObject, DWORD type, PVOID pData, BOOL isHeap) {
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if (hObject == INVALID_HANDLE_VALUE) return;
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handle_list_t* head = &handle_list_root;
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while (1) {
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if (head->m_Handle == hObject && (type == HDATA_ANY || head->m_Type == type)) {
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if (head->m_IsOnHeap) free(head->m_pData);
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head->m_pData = pData;
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head->m_IsOnHeap = isHeap;
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return;
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}
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if (head->m_Next == NULL) break;
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head = head->m_Next;
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}
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head->m_Next = malloc(sizeof *head);
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head->m_Next->m_Handle = hObject;
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head->m_Next->m_pData = pData;
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head->m_Next->m_Next = NULL;
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head->m_Next->m_IsOnHeap = isHeap;
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head->m_Next->m_Type = type;
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}
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BOOL RemoveDataForHandle(HANDLE hObject, DWORD type) {
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if (hObject == INVALID_HANDLE_VALUE) return FALSE;
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handle_list_t* head = &handle_list_root;
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handle_list_t* previous = &handle_list_root;
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BOOL ret = FALSE;
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while (head) {
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if (head->m_Handle == hObject && (type == HDATA_ANY || head->m_Type == type)) {
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previous->m_Next = head->m_Next;
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if (head->m_IsOnHeap) free(head->m_pData);
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handle_list_t* next = head->m_Next;
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free(head);
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head = next;
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if (type != HDATA_ANY) return TRUE;
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ret = TRUE;
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} else {
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previous = head;
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head = head->m_Next;
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}
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}
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return ret;
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}
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HANDLE GetDummyHandle() {
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CHAR path[MAX_PATH];
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GetModuleFileNameA(NULL, path, MAX_PATH);
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HANDLE hObject =
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_CreateFileA(path, 0, FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, OPEN_EXISTING, 0, NULL);
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if (hObject == INVALID_HANDLE_VALUE) {
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log_error(plfMisc, "Failed to create dummy handle: %03x", GetLastError());
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}
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return hObject;
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}
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void BytesToHex(char* hex_buffer, BYTE* bytes, DWORD nbytes) {
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for (size_t i = 0; i < nbytes; i++) {
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sprintf_s(hex_buffer + i * 3, RSIZE_MAX, "%02x ", bytes[i]);
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}
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hex_buffer[nbytes * 3] = '\0';
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}
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void make_dirs(const char* path) {
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int count = 0;
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size_t i;
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size_t len = strlen(path);
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char* temp = malloc(len + 1);
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memcpy(temp, path, len + 1);
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for (i = 0; i < len; i++) {
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if (temp[i] == '/' || temp[i] == '\\') count++;
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}
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// Don't create directories for trailing slashes
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if (count && i && (temp[i - 1] == '/' || temp[i - 1] == '\\')) {
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count--;
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}
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if (count == 0) {
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free(temp);
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return;
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}
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for (i = 0; i < len && count; i++) {
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if (temp[i] == '/' || temp[i] == '\\') {
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temp[i] = '\0';
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CreateDirectory(temp, NULL);
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temp[i] = '\\';
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count--;
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}
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}
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free(temp);
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}
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void* open_mapped_file(LPCSTR lpFilename, DWORD size, HANDLE* file, HANDLE* file_mapping) {
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// char szFileName[MAX_PATH] = { 0 };
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// WideCharToMultiByte(CP_ACP, 0, lpFilename, wcslen(lpFilename), szFileName,
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// size2int(sizeof szFileName), NULL, NULL);
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make_dirs(lpFilename);
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*file = _CreateFileA(lpFilename, GENERIC_READ | GENERIC_WRITE,
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FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE, NULL, OPEN_ALWAYS,
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FILE_ATTRIBUTE_NORMAL, NULL);
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if (*file == INVALID_HANDLE_VALUE) {
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log_error(plfMisc, "Failed to CreateFileW(%s): %d", lpFilename, GetLastError());
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return NULL;
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}
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*file_mapping = CreateFileMappingW(*file, NULL, PAGE_READWRITE, 0, size, NULL);
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if (*file_mapping == INVALID_HANDLE_VALUE) {
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CloseHandle(*file);
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*file = INVALID_HANDLE_VALUE;
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log_error(plfMisc, "Failed to CreateFileMappingW: %d", GetLastError());
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return NULL;
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}
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SetLastError(0);
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void* mapping = MapViewOfFile(*file_mapping, FILE_MAP_ALL_ACCESS, 0, 0, size);
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if (mapping == NULL || GetLastError()) {
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log_error(plfMisc, "Failed to MapViewOfFileEx: %d", GetLastError());
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CloseHandle(*file);
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CloseHandle(*file_mapping);
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*file = INVALID_HANDLE_VALUE;
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*file_mapping = INVALID_HANDLE_VALUE;
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return NULL;
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}
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return mapping;
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}
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