281 lines
11 KiB
C++
281 lines
11 KiB
C++
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/**************************************************************************/
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/* windows_utils.cpp */
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/**************************************************************************/
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/* This file is part of: */
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/* GODOT ENGINE */
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/* https://godotengine.org */
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/**************************************************************************/
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/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
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/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */
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/* */
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/* Permission is hereby granted, free of charge, to any person obtaining */
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/* a copy of this software and associated documentation files (the */
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/* "Software"), to deal in the Software without restriction, including */
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/* without limitation the rights to use, copy, modify, merge, publish, */
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/* distribute, sublicense, and/or sell copies of the Software, and to */
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/* permit persons to whom the Software is furnished to do so, subject to */
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/* the following conditions: */
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/* */
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/* The above copyright notice and this permission notice shall be */
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/* included in all copies or substantial portions of the Software. */
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/* */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
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/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. */
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/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
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/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
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/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
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/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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/**************************************************************************/
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#include "windows_utils.h"
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#ifdef WINDOWS_ENABLED
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#include "core/error/error_macros.h"
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#include "core/io/dir_access.h"
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#include "core/io/file_access.h"
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#define WIN32_LEAN_AND_MEAN
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#include <windows.h>
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#undef FAILED // Overrides Error::FAILED
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// dbghelp is linked only in DEBUG_ENABLED builds.
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#ifdef DEBUG_ENABLED
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#include <dbghelp.h>
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#endif
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#include <winnt.h>
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HashMap<String, Vector<String>> WindowsUtils::temp_pdbs;
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Error WindowsUtils::copy_and_rename_pdb(const String &p_dll_path) {
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#ifdef DEBUG_ENABLED
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// 1000 ought to be enough for anybody, in case the debugger does not unblock previous PDBs.
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// Usually no more than 2 will be used.
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const int max_pdb_names = 1000;
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struct PDBResourceInfo {
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uint32_t address = 0;
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String path;
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} pdb_info;
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// Open and read the PDB information if available.
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{
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ULONG dbg_info_size = 0;
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DWORD dbg_info_position = 0;
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{
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// The custom LoadLibraryExW is used instead of open_dynamic_library
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// to avoid loading the original PDB into the debugger.
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HMODULE library_ptr = LoadLibraryExW((LPCWSTR)(p_dll_path.utf16().get_data()), NULL, LOAD_LIBRARY_AS_DATAFILE_EXCLUSIVE);
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ERR_FAIL_NULL_V_MSG(library_ptr, ERR_FILE_CANT_OPEN, vformat("Failed to load library '%s'.", p_dll_path));
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IMAGE_DEBUG_DIRECTORY *dbg_dir = (IMAGE_DEBUG_DIRECTORY *)ImageDirectoryEntryToDataEx(library_ptr, FALSE, IMAGE_DIRECTORY_ENTRY_DEBUG, &dbg_info_size, NULL);
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bool has_debug = dbg_dir && dbg_dir->Type == IMAGE_DEBUG_TYPE_CODEVIEW;
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if (has_debug) {
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dbg_info_position = dbg_dir->PointerToRawData;
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dbg_info_size = dbg_dir->SizeOfData;
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}
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ERR_FAIL_COND_V_MSG(!FreeLibrary((HMODULE)library_ptr), FAILED, vformat("Failed to free library '%s'.", p_dll_path));
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if (!has_debug) {
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// Skip with no debugging symbols.
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return ERR_SKIP;
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}
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}
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struct CV_HEADER {
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DWORD Signature;
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DWORD Offset;
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};
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const DWORD nb10_magic = '01BN';
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struct CV_INFO_PDB20 {
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CV_HEADER CvHeader; // CvHeader.Signature = "NB10"
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DWORD Signature;
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DWORD Age;
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BYTE PdbFileName[1];
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};
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const DWORD rsds_magic = 'SDSR';
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struct CV_INFO_PDB70 {
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DWORD Signature; // "RSDS"
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BYTE Guid[16];
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DWORD Age;
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BYTE PdbFileName[1];
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};
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Vector<uint8_t> dll_data;
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{
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Error err = OK;
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Ref<FileAccess> file = FileAccess::open(p_dll_path, FileAccess::READ, &err);
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ERR_FAIL_COND_V_MSG(err != OK, err, vformat("Failed to read library '%s'.", p_dll_path));
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file->seek(dbg_info_position);
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dll_data = file->get_buffer(dbg_info_size);
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ERR_FAIL_COND_V_MSG(file->get_error() != OK, file->get_error(), vformat("Failed to read data from library '%s'.", p_dll_path));
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}
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const char *raw_pdb_path = nullptr;
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int raw_pdb_offset = 0;
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DWORD *pdb_info_signature = (DWORD *)dll_data.ptr();
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if (*pdb_info_signature == rsds_magic) {
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raw_pdb_path = (const char *)(((CV_INFO_PDB70 *)pdb_info_signature)->PdbFileName);
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raw_pdb_offset = offsetof(CV_INFO_PDB70, PdbFileName);
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} else if (*pdb_info_signature == nb10_magic) {
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// Not even sure if this format still exists anywhere...
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raw_pdb_path = (const char *)(((CV_INFO_PDB20 *)pdb_info_signature)->PdbFileName);
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raw_pdb_offset = offsetof(CV_INFO_PDB20, PdbFileName);
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} else {
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ERR_FAIL_V_MSG(FAILED, vformat("Unknown PDB format in '%s'.", p_dll_path));
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}
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String utf_path;
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Error err = utf_path.parse_utf8(raw_pdb_path);
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ERR_FAIL_COND_V_MSG(err != OK, err, vformat("Failed to read PDB path from '%s'.", p_dll_path));
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pdb_info.path = utf_path;
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pdb_info.address = dbg_info_position + raw_pdb_offset;
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}
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String dll_base_dir = p_dll_path.get_base_dir();
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String copy_pdb_path = pdb_info.path;
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// Attempting to find the PDB by absolute and relative paths.
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if (copy_pdb_path.is_relative_path()) {
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copy_pdb_path = dll_base_dir.path_join(copy_pdb_path);
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if (!FileAccess::exists(copy_pdb_path)) {
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copy_pdb_path = dll_base_dir.path_join(copy_pdb_path.get_file());
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}
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} else if (!FileAccess::exists(copy_pdb_path)) {
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copy_pdb_path = dll_base_dir.path_join(copy_pdb_path.get_file());
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}
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ERR_FAIL_COND_V_MSG(!FileAccess::exists(copy_pdb_path), FAILED, vformat("File '%s' does not exist.", copy_pdb_path));
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String new_pdb_base_name = p_dll_path.get_file().get_basename() + "_";
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// Checking the available space for the updated string
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// and trying to shorten it if there is not much space.
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{
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// e.g. 999.pdb
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const uint8_t suffix_size = String::num_characters((int64_t)max_pdb_names - 1) + 4;
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// e.g. ~lib_ + 1 for the \0
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const uint8_t min_base_size = 5 + 1;
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int original_path_size = pdb_info.path.utf8().length();
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CharString utf8_name = new_pdb_base_name.utf8();
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int new_expected_buffer_size = utf8_name.length() + suffix_size;
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// Since we have limited space inside the DLL to patch the path to the PDB,
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// it is necessary to limit the size based on the number of bytes occupied by the string.
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if (new_expected_buffer_size > original_path_size) {
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ERR_FAIL_COND_V_MSG(original_path_size < min_base_size + suffix_size, FAILED, vformat("The original PDB path size in bytes is too small: '%s'. Expected size: %d or more bytes, but available %d.", pdb_info.path, min_base_size + suffix_size, original_path_size));
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utf8_name.resize(original_path_size - suffix_size + 1); // +1 for the \0
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utf8_name[utf8_name.size() - 1] = '\0';
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new_pdb_base_name.parse_utf8(utf8_name);
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new_pdb_base_name[new_pdb_base_name.length() - 1] = '_'; // Restore the last '_'
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WARN_PRINT(vformat("The original path size of '%s' in bytes was too small to fit the new name, so it was shortened to '%s%d.pdb'.", pdb_info.path, new_pdb_base_name, max_pdb_names - 1));
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}
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}
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// Delete old PDB files.
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for (const String &file : DirAccess::get_files_at(dll_base_dir)) {
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if (file.begins_with(new_pdb_base_name) && file.ends_with(".pdb")) {
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String path = dll_base_dir.path_join(file);
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// Just try to delete without showing any errors.
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Error err = DirAccess::remove_absolute(path);
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if (err == OK && temp_pdbs[p_dll_path].has(path)) {
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temp_pdbs[p_dll_path].erase(path);
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}
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}
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}
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// Try to copy PDB with new name and patch DLL.
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Ref<DirAccess> d = DirAccess::create(DirAccess::ACCESS_FILESYSTEM);
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for (int i = 0; i < max_pdb_names; i++) {
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String new_pdb_name = vformat("%s%d.pdb", new_pdb_base_name, i);
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String new_pdb_path = dll_base_dir.path_join(new_pdb_name);
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Error err = OK;
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Ref<FileAccess> test_pdb_is_locked = FileAccess::open(new_pdb_path, FileAccess::READ_WRITE, &err);
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if (err == ERR_FILE_CANT_OPEN) {
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// If the file is blocked, continue searching.
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continue;
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} else if (err != OK && err != ERR_FILE_NOT_FOUND) {
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ERR_FAIL_V_MSG(err, vformat("Failed to open '%s' to check if it is locked.", new_pdb_path));
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}
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err = d->copy(copy_pdb_path, new_pdb_path);
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ERR_FAIL_COND_V_MSG(err != OK, err, vformat("Failed to copy PDB from '%s' to '%s'.", copy_pdb_path, new_pdb_path));
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temp_pdbs[p_dll_path].append(new_pdb_path);
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Ref<FileAccess> file = FileAccess::open(p_dll_path, FileAccess::READ_WRITE, &err);
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ERR_FAIL_COND_V_MSG(err != OK, err, vformat("Failed to open '%s' to patch the PDB path.", p_dll_path));
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int original_path_size = pdb_info.path.utf8().length();
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// Double-check file bounds.
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ERR_FAIL_INDEX_V_MSG(pdb_info.address + original_path_size, file->get_length(), FAILED, vformat("Failed to write a new PDB path. Probably '%s' has been changed.", p_dll_path));
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Vector<uint8_t> u8 = new_pdb_name.to_utf8_buffer();
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file->seek(pdb_info.address);
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file->store_buffer(u8);
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// Terminate string and fill the remaining part of the original string with the '\0'.
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// Can be replaced by file->store_8('\0');
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Vector<uint8_t> padding_buffer;
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padding_buffer.resize((int64_t)original_path_size - u8.size());
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padding_buffer.fill('\0');
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file->store_buffer(padding_buffer);
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ERR_FAIL_COND_V_MSG(err != OK, err, vformat("Failed to write a new PDB path to '%s'.", p_dll_path));
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return OK;
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}
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ERR_FAIL_V_MSG(FAILED, vformat("Failed to find an unblocked PDB name for '%s' among %d files.", p_dll_path, max_pdb_names));
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#else
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WARN_PRINT_ONCE("Renaming PDB files is only available in debug builds. If your libraries use PDB files, then the original ones will be used.");
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return ERR_SKIP;
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#endif
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}
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void WindowsUtils::remove_temp_pdbs(const String &p_dll_path) {
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#ifdef DEBUG_ENABLED
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if (temp_pdbs.has(p_dll_path)) {
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Vector<String> removed;
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int failed = 0;
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const int failed_limit = 10;
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for (const String &pdb : temp_pdbs[p_dll_path]) {
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if (FileAccess::exists(pdb)) {
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Error err = DirAccess::remove_absolute(pdb);
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if (err == OK) {
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removed.append(pdb);
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} else {
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failed++;
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if (failed <= failed_limit) {
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print_verbose("Failed to remove temp PDB: " + pdb);
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}
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}
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} else {
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removed.append(pdb);
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}
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}
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if (failed > failed_limit) {
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print_verbose(vformat("And %d more PDB files could not be removed....", failed - failed_limit));
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}
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for (const String &pdb : removed) {
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temp_pdbs[p_dll_path].erase(pdb);
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}
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}
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#endif
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}
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#endif // WINDOWS_ENABLED
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