Add renaming of PDB files to avoid blocking them

13 files changed, 402 insertions, 12 deletions

diff --git a/platform/android/os_android.cpp b/platform/android/os_android.cpp
index 82e7fdb320..bf6b7a7372 100644
--- a/platform/android/os_android.cpp
+++ b/platform/android/os_android.cpp
@@ -162,7 +162,7 @@ Vector<String> OS_Android::get_granted_permissions() const {
 	return godot_java->get_granted_permissions();
 }
 
-Error OS_Android::open_dynamic_library(const String &p_path, void *&p_library_handle, bool p_also_set_library_path, String *r_resolved_path) {
+Error OS_Android::open_dynamic_library(const String &p_path, void *&p_library_handle, bool p_also_set_library_path, String *r_resolved_path, bool p_generate_temp_files) {
 	String path = p_path;
 	bool so_file_exists = true;
 	if (!FileAccess::exists(path)) {
diff --git a/platform/android/os_android.h b/platform/android/os_android.h
index 31ee7389df..e01d759494 100644
--- a/platform/android/os_android.h
+++ b/platform/android/os_android.h
@@ -113,7 +113,7 @@ public:
 
 	virtual void alert(const String &p_alert, const String &p_title) override;
 
-	virtual Error open_dynamic_library(const String &p_path, void *&p_library_handle, bool p_also_set_library_path = false, String *r_resolved_path = nullptr) override;
+	virtual Error open_dynamic_library(const String &p_path, void *&p_library_handle, bool p_also_set_library_path = false, String *r_resolved_path = nullptr, bool p_generate_temp_files = false) override;
 
 	virtual String get_name() const override;
 	virtual String get_distribution_name() const override;
diff --git a/platform/ios/os_ios.h b/platform/ios/os_ios.h
index 10ecd08a89..6950720b38 100644
--- a/platform/ios/os_ios.h
+++ b/platform/ios/os_ios.h
@@ -103,7 +103,7 @@ public:
 	virtual Vector<String> get_system_font_path_for_text(const String &p_font_name, const String &p_text, const String &p_locale = String(), const String &p_script = String(), int p_weight = 400, int p_stretch = 100, bool p_italic = false) const override;
 	virtual String get_system_font_path(const String &p_font_name, int p_weight = 400, int p_stretch = 100, bool p_italic = false) const override;
 
-	virtual Error open_dynamic_library(const String &p_path, void *&p_library_handle, bool p_also_set_library_path = false, String *r_resolved_path = nullptr) override;
+	virtual Error open_dynamic_library(const String &p_path, void *&p_library_handle, bool p_also_set_library_path = false, String *r_resolved_path = nullptr, bool p_generate_temp_files = false) override;
 	virtual Error close_dynamic_library(void *p_library_handle) override;
 	virtual Error get_dynamic_library_symbol_handle(void *p_library_handle, const String &p_name, void *&p_symbol_handle, bool p_optional = false) override;
 
diff --git a/platform/ios/os_ios.mm b/platform/ios/os_ios.mm
index ac13a4d457..c989dc6221 100644
--- a/platform/ios/os_ios.mm
+++ b/platform/ios/os_ios.mm
@@ -219,7 +219,7 @@ _FORCE_INLINE_ String OS_IOS::get_framework_executable(const String &p_path) {
 	return p_path;
 }
 
-Error OS_IOS::open_dynamic_library(const String &p_path, void *&p_library_handle, bool p_also_set_library_path, String *r_resolved_path) {
+Error OS_IOS::open_dynamic_library(const String &p_path, void *&p_library_handle, bool p_also_set_library_path, String *r_resolved_path, bool p_generate_temp_files) {
 	if (p_path.length() == 0) {
 		// Static xcframework.
 		p_library_handle = RTLD_SELF;
diff --git a/platform/macos/os_macos.h b/platform/macos/os_macos.h
index 8088c3431c..439e7d2fff 100644
--- a/platform/macos/os_macos.h
+++ b/platform/macos/os_macos.h
@@ -85,7 +85,7 @@ public:
 
 	virtual void alert(const String &p_alert, const String &p_title = "ALERT!") override;
 
-	virtual Error open_dynamic_library(const String &p_path, void *&p_library_handle, bool p_also_set_library_path = false, String *r_resolved_path = nullptr) override;
+	virtual Error open_dynamic_library(const String &p_path, void *&p_library_handle, bool p_also_set_library_path = false, String *r_resolved_path = nullptr, bool p_generate_temp_files = false) override;
 
 	virtual MainLoop *get_main_loop() const override;
 
diff --git a/platform/macos/os_macos.mm b/platform/macos/os_macos.mm
index d9ad8f937a..261777a4e8 100644
--- a/platform/macos/os_macos.mm
+++ b/platform/macos/os_macos.mm
@@ -217,7 +217,7 @@ _FORCE_INLINE_ String OS_MacOS::get_framework_executable(const String &p_path) {
 	return p_path;
 }
 
-Error OS_MacOS::open_dynamic_library(const String &p_path, void *&p_library_handle, bool p_also_set_library_path, String *r_resolved_path) {
+Error OS_MacOS::open_dynamic_library(const String &p_path, void *&p_library_handle, bool p_also_set_library_path, String *r_resolved_path, bool p_generate_temp_files) {
 	String path = get_framework_executable(p_path);
 
 	if (!FileAccess::exists(path)) {
diff --git a/platform/web/os_web.cpp b/platform/web/os_web.cpp
index 4b93ce9e75..8fc89a79d9 100644
--- a/platform/web/os_web.cpp
+++ b/platform/web/os_web.cpp
@@ -243,7 +243,7 @@ bool OS_Web::is_userfs_persistent() const {
 	return idb_available;
 }
 
-Error OS_Web::open_dynamic_library(const String &p_path, void *&p_library_handle, bool p_also_set_library_path, String *r_resolved_path) {
+Error OS_Web::open_dynamic_library(const String &p_path, void *&p_library_handle, bool p_also_set_library_path, String *r_resolved_path, bool p_generate_temp_files) {
 	String path = p_path.get_file();
 	p_library_handle = dlopen(path.utf8().get_data(), RTLD_NOW);
 	ERR_FAIL_NULL_V_MSG(p_library_handle, ERR_CANT_OPEN, vformat("Can't open dynamic library: %s. Error: %s.", p_path, dlerror()));
diff --git a/platform/web/os_web.h b/platform/web/os_web.h
index 16f8ea8550..537b05048a 100644
--- a/platform/web/os_web.h
+++ b/platform/web/os_web.h
@@ -108,7 +108,7 @@ public:
 
 	void alert(const String &p_alert, const String &p_title = "ALERT!") override;
 
-	Error open_dynamic_library(const String &p_path, void *&p_library_handle, bool p_also_set_library_path = false, String *r_resolved_path = nullptr) override;
+	Error open_dynamic_library(const String &p_path, void *&p_library_handle, bool p_also_set_library_path = false, String *r_resolved_path = nullptr, bool p_generate_temp_files = false) override;
 
 	void resume_audio();
 
diff --git a/platform/windows/SCsub b/platform/windows/SCsub
index cf6416b8da..159a273e70 100644
--- a/platform/windows/SCsub
+++ b/platform/windows/SCsub
@@ -17,6 +17,7 @@ common_win = [
     "joypad_windows.cpp",
     "tts_windows.cpp",
     "windows_terminal_logger.cpp",
+    "windows_utils.cpp",
     "native_menu_windows.cpp",
     "gl_manager_windows_native.cpp",
     "gl_manager_windows_angle.cpp",
diff --git a/platform/windows/os_windows.cpp b/platform/windows/os_windows.cpp
index c39b327953..e0e35c6e0f 100644
--- a/platform/windows/os_windows.cpp
+++ b/platform/windows/os_windows.cpp
@@ -34,6 +34,7 @@
 #include "joypad_windows.h"
 #include "lang_table.h"
 #include "windows_terminal_logger.h"
+#include "windows_utils.h"
 
 #include "core/debugger/engine_debugger.h"
 #include "core/debugger/script_debugger.h"
@@ -269,6 +270,10 @@ void OS_Windows::finalize() {
 }
 
 void OS_Windows::finalize_core() {
+	while (!temp_libraries.is_empty()) {
+		_remove_temp_library(temp_libraries.last()->key);
+	}
+
 	FileAccessWindows::finalize();
 
 	timeEndPeriod(1);
@@ -354,7 +359,7 @@ void debug_dynamic_library_check_dependencies(const String &p_root_path, const S
 }
 #endif
 
-Error OS_Windows::open_dynamic_library(const String &p_path, void *&p_library_handle, bool p_also_set_library_path, String *r_resolved_path) {
+Error OS_Windows::open_dynamic_library(const String &p_path, void *&p_library_handle, bool p_also_set_library_path, String *r_resolved_path, bool p_generate_temp_files) {
 	String path = p_path.replace("/", "\\");
 
 	if (!FileAccess::exists(path)) {
@@ -364,6 +369,35 @@ Error OS_Windows::open_dynamic_library(const String &p_path, void *&p_library_ha
 
 	ERR_FAIL_COND_V(!FileAccess::exists(path), ERR_FILE_NOT_FOUND);
 
+	// Here we want a copy to be loaded.
+	// This is so the original file isn't locked and can be updated by a compiler.
+	if (p_generate_temp_files) {
+		// Copy the file to the same directory as the original with a prefix in the name.
+		// This is so relative path to dependencies are satisfied.
+		String copy_path = path.get_base_dir().path_join("~" + path.get_file());
+
+		// If there's a left-over copy (possibly from a crash) then delete it first.
+		if (FileAccess::exists(copy_path)) {
+			DirAccess::remove_absolute(copy_path);
+		}
+
+		Error copy_err = DirAccess::copy_absolute(path, copy_path);
+		if (copy_err) {
+			ERR_PRINT("Error copying library: " + path);
+			return ERR_CANT_CREATE;
+		}
+
+		FileAccess::set_hidden_attribute(copy_path, true);
+
+		// Save the copied path so it can be deleted later.
+		path = copy_path;
+
+		Error pdb_err = WindowsUtils::copy_and_rename_pdb(path);
+		if (pdb_err != OK && pdb_err != ERR_SKIP) {
+			WARN_PRINT(vformat("Failed to rename the PDB file. The original PDB file for '%s' will be loaded.", path));
+		}
+	}
+
 	typedef DLL_DIRECTORY_COOKIE(WINAPI * PAddDllDirectory)(PCWSTR);
 	typedef BOOL(WINAPI * PRemoveDllDirectory)(DLL_DIRECTORY_COOKIE);
 
@@ -378,8 +412,12 @@ Error OS_Windows::open_dynamic_library(const String &p_path, void *&p_library_ha
 	}
 
 	p_library_handle = (void *)LoadLibraryExW((LPCWSTR)(path.utf16().get_data()), nullptr, (p_also_set_library_path && has_dll_directory_api) ? LOAD_LIBRARY_SEARCH_DEFAULT_DIRS : 0);
-#ifdef DEBUG_ENABLED
 	if (!p_library_handle) {
+		if (p_generate_temp_files) {
+			DirAccess::remove_absolute(path);
+		}
+
+#ifdef DEBUG_ENABLED
 		DWORD err_code = GetLastError();
 
 		HashSet<String> checekd_libs;
@@ -397,8 +435,10 @@ Error OS_Windows::open_dynamic_library(const String &p_path, void *&p_library_ha
 		} else {
 			ERR_FAIL_V_MSG(ERR_CANT_OPEN, vformat("Can't open dynamic library: %s. Error: %s.", p_path, format_error_message(err_code)));
 		}
+#endif
 	}
-#else
+
+#ifndef DEBUG_ENABLED
 	ERR_FAIL_NULL_V_MSG(p_library_handle, ERR_CANT_OPEN, vformat("Can't open dynamic library: %s. Error: %s.", p_path, format_error_message(GetLastError())));
 #endif
 
@@ -410,6 +450,10 @@ Error OS_Windows::open_dynamic_library(const String &p_path, void *&p_library_ha
 		*r_resolved_path = path;
 	}
 
+	if (p_generate_temp_files) {
+		temp_libraries[p_library_handle] = path;
+	}
+
 	return OK;
 }
 
@@ -417,9 +461,22 @@ Error OS_Windows::close_dynamic_library(void *p_library_handle) {
 	if (!FreeLibrary((HMODULE)p_library_handle)) {
 		return FAILED;
 	}
+
+	// Delete temporary copy of library if it exists.
+	_remove_temp_library(p_library_handle);
+
 	return OK;
 }
 
+void OS_Windows::_remove_temp_library(void *p_library_handle) {
+	if (temp_libraries.has(p_library_handle)) {
+		String path = temp_libraries[p_library_handle];
+		DirAccess::remove_absolute(path);
+		WindowsUtils::remove_temp_pdbs(path);
+		temp_libraries.erase(p_library_handle);
+	}
+}
+
 Error OS_Windows::get_dynamic_library_symbol_handle(void *p_library_handle, const String &p_name, void *&p_symbol_handle, bool p_optional) {
 	p_symbol_handle = (void *)GetProcAddress((HMODULE)p_library_handle, p_name.utf8().get_data());
 	if (!p_symbol_handle) {
diff --git a/platform/windows/os_windows.h b/platform/windows/os_windows.h
index c703a3ddca..c506af13b2 100644
--- a/platform/windows/os_windows.h
+++ b/platform/windows/os_windows.h
@@ -127,6 +127,9 @@ class OS_Windows : public OS {
 	bool dwrite_init = false;
 	bool dwrite2_init = false;
 
+	HashMap<void *, String> temp_libraries;
+
+	void _remove_temp_library(void *p_library_handle);
 	String _get_default_fontname(const String &p_font_name) const;
 	DWRITE_FONT_WEIGHT _weight_to_dw(int p_weight) const;
 	DWRITE_FONT_STRETCH _stretch_to_dw(int p_stretch) const;
@@ -155,7 +158,7 @@ public:
 
 	virtual Error get_entropy(uint8_t *r_buffer, int p_bytes) override;
 
-	virtual Error open_dynamic_library(const String &p_path, void *&p_library_handle, bool p_also_set_library_path = false, String *r_resolved_path = nullptr) override;
+	virtual Error open_dynamic_library(const String &p_path, void *&p_library_handle, bool p_also_set_library_path = false, String *r_resolved_path = nullptr, bool p_generate_temp_files = false) override;
 	virtual Error close_dynamic_library(void *p_library_handle) override;
 	virtual Error get_dynamic_library_symbol_handle(void *p_library_handle, const String &p_name, void *&p_symbol_handle, bool p_optional = false) override;
 
diff --git a/platform/windows/windows_utils.cpp b/platform/windows/windows_utils.cpp
new file mode 100644
index 0000000000..147b8bcbae
--- /dev/null
+++ b/platform/windows/windows_utils.cpp
@@ -0,0 +1,280 @@
+/**************************************************************************/
+/*  windows_utils.cpp                                                     */
+/**************************************************************************/
+/*                         This file is part of:                          */
+/*                             GODOT ENGINE                               */
+/*                        https://godotengine.org                         */
+/**************************************************************************/
+/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
+/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur.                  */
+/*                                                                        */
+/* Permission is hereby granted, free of charge, to any person obtaining  */
+/* a copy of this software and associated documentation files (the        */
+/* "Software"), to deal in the Software without restriction, including    */
+/* without limitation the rights to use, copy, modify, merge, publish,    */
+/* distribute, sublicense, and/or sell copies of the Software, and to     */
+/* permit persons to whom the Software is furnished to do so, subject to  */
+/* the following conditions:                                              */
+/*                                                                        */
+/* The above copyright notice and this permission notice shall be         */
+/* included in all copies or substantial portions of the Software.        */
+/*                                                                        */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,        */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF     */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. */
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY   */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,   */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE      */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                 */
+/**************************************************************************/
+
+#include "windows_utils.h"
+
+#ifdef WINDOWS_ENABLED
+
+#include "core/error/error_macros.h"
+#include "core/io/dir_access.h"
+#include "core/io/file_access.h"
+
+#define WIN32_LEAN_AND_MEAN
+#include <windows.h>
+#undef FAILED // Overrides Error::FAILED
+
+// dbghelp is linked only in DEBUG_ENABLED builds.
+#ifdef DEBUG_ENABLED
+#include <dbghelp.h>
+#endif
+#include <winnt.h>
+
+HashMap<String, Vector<String>> WindowsUtils::temp_pdbs;
+
+Error WindowsUtils::copy_and_rename_pdb(const String &p_dll_path) {
+#ifdef DEBUG_ENABLED
+	// 1000 ought to be enough for anybody, in case the debugger does not unblock previous PDBs.
+	// Usually no more than 2 will be used.
+	const int max_pdb_names = 1000;
+
+	struct PDBResourceInfo {
+		uint32_t address = 0;
+		String path;
+	} pdb_info;
+
+	// Open and read the PDB information if available.
+	{
+		ULONG dbg_info_size = 0;
+		DWORD dbg_info_position = 0;
+
+		{
+			// The custom LoadLibraryExW is used instead of open_dynamic_library
+			// to avoid loading the original PDB into the debugger.
+			HMODULE library_ptr = LoadLibraryExW((LPCWSTR)(p_dll_path.utf16().get_data()), NULL, LOAD_LIBRARY_AS_DATAFILE_EXCLUSIVE);
+
+			ERR_FAIL_NULL_V_MSG(library_ptr, ERR_FILE_CANT_OPEN, vformat("Failed to load library '%s'.", p_dll_path));
+
+			IMAGE_DEBUG_DIRECTORY *dbg_dir = (IMAGE_DEBUG_DIRECTORY *)ImageDirectoryEntryToDataEx(library_ptr, FALSE, IMAGE_DIRECTORY_ENTRY_DEBUG, &dbg_info_size, NULL);
+
+			bool has_debug = dbg_dir && dbg_dir->Type == IMAGE_DEBUG_TYPE_CODEVIEW;
+			if (has_debug) {
+				dbg_info_position = dbg_dir->PointerToRawData;
+				dbg_info_size = dbg_dir->SizeOfData;
+			}
+
+			ERR_FAIL_COND_V_MSG(!FreeLibrary((HMODULE)library_ptr), FAILED, vformat("Failed to free library '%s'.", p_dll_path));
+
+			if (!has_debug) {
+				// Skip with no debugging symbols.
+				return ERR_SKIP;
+			}
+		}
+
+		struct CV_HEADER {
+			DWORD Signature;
+			DWORD Offset;
+		};
+
+		const DWORD nb10_magic = '01BN';
+		struct CV_INFO_PDB20 {
+			CV_HEADER CvHeader; // CvHeader.Signature = "NB10"
+			DWORD Signature;
+			DWORD Age;
+			BYTE PdbFileName[1];
+		};
+
+		const DWORD rsds_magic = 'SDSR';
+		struct CV_INFO_PDB70 {
+			DWORD Signature; // "RSDS"
+			BYTE Guid[16];
+			DWORD Age;
+			BYTE PdbFileName[1];
+		};
+
+		Vector<uint8_t> dll_data;
+
+		{
+			Error err = OK;
+			Ref<FileAccess> file = FileAccess::open(p_dll_path, FileAccess::READ, &err);
+			ERR_FAIL_COND_V_MSG(err != OK, err, vformat("Failed to read library '%s'.", p_dll_path));
+
+			file->seek(dbg_info_position);
+			dll_data = file->get_buffer(dbg_info_size);
+			ERR_FAIL_COND_V_MSG(file->get_error() != OK, file->get_error(), vformat("Failed to read data from library '%s'.", p_dll_path));
+		}
+
+		const char *raw_pdb_path = nullptr;
+		int raw_pdb_offset = 0;
+		DWORD *pdb_info_signature = (DWORD *)dll_data.ptr();
+
+		if (*pdb_info_signature == rsds_magic) {
+			raw_pdb_path = (const char *)(((CV_INFO_PDB70 *)pdb_info_signature)->PdbFileName);
+			raw_pdb_offset = offsetof(CV_INFO_PDB70, PdbFileName);
+		} else if (*pdb_info_signature == nb10_magic) {
+			// Not even sure if this format still exists anywhere...
+			raw_pdb_path = (const char *)(((CV_INFO_PDB20 *)pdb_info_signature)->PdbFileName);
+			raw_pdb_offset = offsetof(CV_INFO_PDB20, PdbFileName);
+		} else {
+			ERR_FAIL_V_MSG(FAILED, vformat("Unknown PDB format in '%s'.", p_dll_path));
+		}
+
+		String utf_path;
+		Error err = utf_path.parse_utf8(raw_pdb_path);
+		ERR_FAIL_COND_V_MSG(err != OK, err, vformat("Failed to read PDB path from '%s'.", p_dll_path));
+
+		pdb_info.path = utf_path;
+		pdb_info.address = dbg_info_position + raw_pdb_offset;
+	}
+
+	String dll_base_dir = p_dll_path.get_base_dir();
+	String copy_pdb_path = pdb_info.path;
+
+	// Attempting to find the PDB by absolute and relative paths.
+	if (copy_pdb_path.is_relative_path()) {
+		copy_pdb_path = dll_base_dir.path_join(copy_pdb_path);
+		if (!FileAccess::exists(copy_pdb_path)) {
+			copy_pdb_path = dll_base_dir.path_join(copy_pdb_path.get_file());
+		}
+	} else if (!FileAccess::exists(copy_pdb_path)) {
+		copy_pdb_path = dll_base_dir.path_join(copy_pdb_path.get_file());
+	}
+	ERR_FAIL_COND_V_MSG(!FileAccess::exists(copy_pdb_path), FAILED, vformat("File '%s' does not exist.", copy_pdb_path));
+
+	String new_pdb_base_name = p_dll_path.get_file().get_basename() + "_";
+
+	// Checking the available space for the updated string
+	// and trying to shorten it if there is not much space.
+	{
+		// e.g. 999.pdb
+		const uint8_t suffix_size = String::num_characters((int64_t)max_pdb_names - 1) + 4;
+		// e.g. ~lib_ + 1 for the \0
+		const uint8_t min_base_size = 5 + 1;
+		int original_path_size = pdb_info.path.utf8().length();
+		CharString utf8_name = new_pdb_base_name.utf8();
+		int new_expected_buffer_size = utf8_name.length() + suffix_size;
+
+		// Since we have limited space inside the DLL to patch the path to the PDB,
+		// it is necessary to limit the size based on the number of bytes occupied by the string.
+		if (new_expected_buffer_size > original_path_size) {
+			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));
+
+			utf8_name.resize(original_path_size - suffix_size + 1); // +1 for the \0
+			utf8_name[utf8_name.size() - 1] = '\0';
+			new_pdb_base_name.parse_utf8(utf8_name);
+			new_pdb_base_name[new_pdb_base_name.length() - 1] = '_'; // Restore the last '_'
+			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));
+		}
+	}
+
+	// Delete old PDB files.
+	for (const String &file : DirAccess::get_files_at(dll_base_dir)) {
+		if (file.begins_with(new_pdb_base_name) && file.ends_with(".pdb")) {
+			String path = dll_base_dir.path_join(file);
+
+			// Just try to delete without showing any errors.
+			Error err = DirAccess::remove_absolute(path);
+			if (err == OK && temp_pdbs[p_dll_path].has(path)) {
+				temp_pdbs[p_dll_path].erase(path);
+			}
+		}
+	}
+
+	// Try to copy PDB with new name and patch DLL.
+	Ref<DirAccess> d = DirAccess::create(DirAccess::ACCESS_FILESYSTEM);
+	for (int i = 0; i < max_pdb_names; i++) {
+		String new_pdb_name = vformat("%s%d.pdb", new_pdb_base_name, i);
+		String new_pdb_path = dll_base_dir.path_join(new_pdb_name);
+		Error err = OK;
+
+		Ref<FileAccess> test_pdb_is_locked = FileAccess::open(new_pdb_path, FileAccess::READ_WRITE, &err);
+		if (err == ERR_FILE_CANT_OPEN) {
+			// If the file is blocked, continue searching.
+			continue;
+		} else if (err != OK && err != ERR_FILE_NOT_FOUND) {
+			ERR_FAIL_V_MSG(err, vformat("Failed to open '%s' to check if it is locked.", new_pdb_path));
+		}
+
+		err = d->copy(copy_pdb_path, new_pdb_path);
+		ERR_FAIL_COND_V_MSG(err != OK, err, vformat("Failed to copy PDB from '%s' to '%s'.", copy_pdb_path, new_pdb_path));
+		temp_pdbs[p_dll_path].append(new_pdb_path);
+
+		Ref<FileAccess> file = FileAccess::open(p_dll_path, FileAccess::READ_WRITE, &err);
+		ERR_FAIL_COND_V_MSG(err != OK, err, vformat("Failed to open '%s' to patch the PDB path.", p_dll_path));
+
+		int original_path_size = pdb_info.path.utf8().length();
+		// Double-check file bounds.
+		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));
+
+		Vector<uint8_t> u8 = new_pdb_name.to_utf8_buffer();
+		file->seek(pdb_info.address);
+		file->store_buffer(u8);
+
+		// Terminate string and fill the remaining part of the original string with the '\0'.
+		// Can be replaced by file->store_8('\0');
+		Vector<uint8_t> padding_buffer;
+		padding_buffer.resize((int64_t)original_path_size - u8.size());
+		padding_buffer.fill('\0');
+		file->store_buffer(padding_buffer);
+		ERR_FAIL_COND_V_MSG(err != OK, err, vformat("Failed to write a new PDB path to '%s'.", p_dll_path));
+
+		return OK;
+	}
+
+	ERR_FAIL_V_MSG(FAILED, vformat("Failed to find an unblocked PDB name for '%s' among %d files.", p_dll_path, max_pdb_names));
+#else
+	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.");
+	return ERR_SKIP;
+#endif
+}
+
+void WindowsUtils::remove_temp_pdbs(const String &p_dll_path) {
+#ifdef DEBUG_ENABLED
+	if (temp_pdbs.has(p_dll_path)) {
+		Vector<String> removed;
+		int failed = 0;
+		const int failed_limit = 10;
+		for (const String &pdb : temp_pdbs[p_dll_path]) {
+			if (FileAccess::exists(pdb)) {
+				Error err = DirAccess::remove_absolute(pdb);
+				if (err == OK) {
+					removed.append(pdb);
+				} else {
+					failed++;
+					if (failed <= failed_limit) {
+						print_verbose("Failed to remove temp PDB: " + pdb);
+					}
+				}
+			} else {
+				removed.append(pdb);
+			}
+		}
+
+		if (failed > failed_limit) {
+			print_verbose(vformat("And %d more PDB files could not be removed....", failed - failed_limit));
+		}
+
+		for (const String &pdb : removed) {
+			temp_pdbs[p_dll_path].erase(pdb);
+		}
+	}
+#endif
+}
+
+#endif // WINDOWS_ENABLED
diff --git a/platform/windows/windows_utils.h b/platform/windows/windows_utils.h
new file mode 100644
index 0000000000..3f5d75294e
--- /dev/null
+++ b/platform/windows/windows_utils.h
@@ -0,0 +1,49 @@
+/**************************************************************************/
+/*  windows_utils.h                                                       */
+/**************************************************************************/
+/*                         This file is part of:                          */
+/*                             GODOT ENGINE                               */
+/*                        https://godotengine.org                         */
+/**************************************************************************/
+/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
+/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur.                  */
+/*                                                                        */
+/* Permission is hereby granted, free of charge, to any person obtaining  */
+/* a copy of this software and associated documentation files (the        */
+/* "Software"), to deal in the Software without restriction, including    */
+/* without limitation the rights to use, copy, modify, merge, publish,    */
+/* distribute, sublicense, and/or sell copies of the Software, and to     */
+/* permit persons to whom the Software is furnished to do so, subject to  */
+/* the following conditions:                                              */
+/*                                                                        */
+/* The above copyright notice and this permission notice shall be         */
+/* included in all copies or substantial portions of the Software.        */
+/*                                                                        */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,        */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF     */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. */
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY   */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,   */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE      */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                 */
+/**************************************************************************/
+
+#ifndef WINDOWS_UTILS_H
+#define WINDOWS_UTILS_H
+
+#ifdef WINDOWS_ENABLED
+
+#include "core/string/ustring.h"
+#include "core/templates/hash_map.h"
+
+class WindowsUtils {
+	static HashMap<String, Vector<String>> temp_pdbs;
+
+public:
+	static Error copy_and_rename_pdb(const String &p_dll_path);
+	static void remove_temp_pdbs(const String &p_dll_path);
+};
+
+#endif // WINDOWS_ENABLED
+
+#endif // WINDOWS_UTILS_H