[ros-diffs] [reactos] 06/06: [VCRUNTIME] Add initialization / cleanup of wine code

[Timo Kreuzer]

https://git.reactos.org/?p=reactos.git;a=commitdiff;h=92d479a54b1960acf420a…

commit 92d479a54b1960acf420a981fc6f4c7c87d7a09b
Author:     Timo Kreuzer <timo.kreuzer(a)reactos.org>
AuthorDate: Wed Jan 29 13:15:16 2025 +0200
Commit:     Timo Kreuzer <timo.kreuzer(a)reactos.org>
CommitDate: Thu Feb 6 09:17:37 2025 +0200

    [VCRUNTIME] Add initialization / cleanup of wine code
---
 sdk/lib/vcruntime/CMakeLists.txt                   |  3 +-
 sdk/lib/vcruntime/__vcrt_init.c                    | 47 +++++++++++++++++++---
 .../{__vcrt_init.c => __vcrt_init_stubs.c}         |  4 +-
 3 files changed, 45 insertions(+), 9 deletions(-)

diff --git a/sdk/lib/vcruntime/CMakeLists.txt b/sdk/lib/vcruntime/CMakeLists.txt
index 633a1b7a466..405dc705bd9 100644
--- a/sdk/lib/vcruntime/CMakeLists.txt
+++ b/sdk/lib/vcruntime/CMakeLists.txt
@@ -20,7 +20,6 @@ list(APPEND VCRT_COMMON_SOURCES
     __report_gsfailure.c
     __report_rangecheckfailure.c
     __security_init_cookie.c
-    __vcrt_init.c
     _fltused.c
     initializers.cpp
     isa_available.cpp
@@ -29,11 +28,13 @@ list(APPEND VCRT_COMMON_SOURCES
 
 list(APPEND VCRT_RUNTIME_SOURCES
     __std_terminate.c
+    __vcrt_init.c
 )
 
 list(APPEND VCRT_STARTUP_SOURCES
     __acrt_initialize_stub.cpp
     __scrt_uninitialize_crt.cpp
+    __vcrt_init_stubs.c
     mainCRTStartup.cpp
     wmainCRTStartup.cpp
 )
diff --git a/sdk/lib/vcruntime/__vcrt_init.c b/sdk/lib/vcruntime/__vcrt_init.c
index 45cce866e92..839c24de7e8 100644
--- a/sdk/lib/vcruntime/__vcrt_init.c
+++ b/sdk/lib/vcruntime/__vcrt_init.c
@@ -8,29 +8,64 @@
 // SPDX-License-Identifier: MIT
 //
 
-#include <vcruntime_startup.h>
+#include <internal_shared.h>
+
+void msvcrt_init_exception(HINSTANCE hinstDLL);
+BOOL msvcrt_init_tls(void);
+void msvcrt_free_tls_mem(void);
+BOOL msvcrt_free_tls(void);
 
 __vcrt_bool __cdecl __vcrt_initialize(void)
 {
-    return 1;
+    msvcrt_init_exception(GetModuleHandle(NULL));
+
+    if (!msvcrt_init_tls())
+        return FALSE;
+
+    return TRUE;
 }
 
 __vcrt_bool __cdecl __vcrt_uninitialize(_In_ __vcrt_bool _Terminating)
 {
-    return 1;
+    if (!msvcrt_free_tls())
+        return FALSE;
+
+    return TRUE;
 }
 
 __vcrt_bool __cdecl __vcrt_uninitialize_critical(void)
 {
-    return 1;
+    return TRUE;
 }
 
 __vcrt_bool __cdecl __vcrt_thread_attach(void)
 {
-    return 1;
+    // Not called by UCRT
+    return TRUE;
 }
 
 __vcrt_bool __cdecl __vcrt_thread_detach(void)
 {
-    return 1;
+    // Not called by UCRT
+    return TRUE;
 }
+
+// UCRT doesn't have a thread detach callback for the vcruntime TLS, because
+// the native vcruntime uses FlsAlloc and provides a cleanup callback there.
+// Since we don't have that, we use TLS callbacks.
+const IMAGE_TLS_DIRECTORY* __p_tls_used = &_tls_used;
+
+static
+VOID
+WINAPI
+wine_tls_cleanup_callback(PVOID hinstDLL, DWORD fdwReason, LPVOID lpvReserved)
+{
+    // For the last thread, only DLL_PROCESS_DETACH is called
+    if ((fdwReason == DLL_THREAD_DETACH) ||
+        (fdwReason == DLL_PROCESS_DETACH))
+    {
+        msvcrt_free_tls_mem();
+    }
+}
+
+_CRTALLOC(".CRT$XLD") PIMAGE_TLS_CALLBACK wine_tls_cleanup_ptr =
wine_tls_cleanup_callback;
diff --git a/sdk/lib/vcruntime/__vcrt_init.c b/sdk/lib/vcruntime/__vcrt_init_stubs.c
similarity index 84%
copy from sdk/lib/vcruntime/__vcrt_init.c
copy to sdk/lib/vcruntime/__vcrt_init_stubs.c
index 45cce866e92..3b01a3f119b 100644
--- a/sdk/lib/vcruntime/__vcrt_init.c
+++ b/sdk/lib/vcruntime/__vcrt_init_stubs.c
@@ -1,9 +1,9 @@
 //
-// __vcrt_init.c
+// __vcrt_init_stubs.c
 //
 //      Copyright (c) 2024 Timo Kreuzer
 //
-// Implementation of vcruntime initialization and termination functions.
+// Stubs for vcruntime initialization and termination in vcstartup.
 //
 // SPDX-License-Identifier: MIT
 //