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godot/core/object
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Ryan Roden-Corrent 731a13a1ba
Fix race in ScriptServer. 
Fixes #76581.

TSAN flagged this issue on starting the editor:

1. main calls register_core_types, which calls IP::create(), which calls Thread::start on the resolver thread
2. Thread::callback calls ScriptServer::thread_enter(), as "Scripts may need to attach a stack."
3. ScriptServer::thread_enter() accesses ScriptServer::_languages, which is still being initialized on the main thread by initialize_gdscript_module

This fixes the issue by skipping thread enter/exit notifications if languages have not finished initializing yet.
I'm assuming that notifying un-initialized languages of thread starts/stops would have been pointless anyways. If we need to somehow notify languages of threads before the languages initialize, we'll need a different solution.

```
Godot Engine v4.0.2.stable.custom_build.7a0977ce2 - https://godotengine.org
==================
WARNING: ThreadSanitizer: data race (pid=9426)
  Write of size 4 at 0x55615b187cd0 by main thread:
    #0 ScriptServer::register_language(ScriptLanguage*) /home/rcorre/src/godot/godot/core/object/script_language.cpp:177:28 (godot.linuxbsd.editor.x86_64.llvm.san+0x9e52ab9) (BuildId: 780a9db7c37d88e78d5ee659c4fa1cd378abd048)
    #1 initialize_gdscript_module(ModuleInitializationLevel) /home/rcorre/src/godot/godot/modules/gdscript/register_types.cpp:118:3 (godot.linuxbsd.editor.x86_64.llvm.san+0x36f9c6f) (BuildId: 780a9db7c37d88e78d5ee659c4fa1cd378abd048)
    #2 initialize_modules(ModuleInitializationLevel) /home/rcorre/src/godot/godot/modules/register_module_types.gen.cpp:93:2 (godot.linuxbsd.editor.x86_64.llvm.san+0x2f50499) (BuildId: 780a9db7c37d88e78d5ee659c4fa1cd378abd048)
    #3 Main::setup2(unsigned long) /home/rcorre/src/godot/godot/main/main.cpp:1961:2 (godot.linuxbsd.editor.x86_64.llvm.san+0x2f1d40d) (BuildId: 780a9db7c37d88e78d5ee659c4fa1cd378abd048)
    #4 Main::setup(char const*, int, char**, bool) /home/rcorre/src/godot/godot/main/main.cpp:1879:10 (godot.linuxbsd.editor.x86_64.llvm.san+0x2f16370) (BuildId: 780a9db7c37d88e78d5ee659c4fa1cd378abd048)
    #5 main /home/rcorre/src/godot/godot/platform/linuxbsd/godot_linuxbsd.cpp:61:14 (godot.linuxbsd.editor.x86_64.llvm.san+0x2e67e1f) (BuildId: 780a9db7c37d88e78d5ee659c4fa1cd378abd048)

  Previous read of size 4 at 0x55615b187cd0 by thread T1:
    #0 ScriptServer::thread_enter() /home/rcorre/src/godot/godot/core/object/script_language.cpp:244:22 (godot.linuxbsd.editor.x86_64.llvm.san+0x9e54aed) (BuildId: 780a9db7c37d88e78d5ee659c4fa1cd378abd048)
    #1 Thread::callback(unsigned long, Thread::Settings const&, void (*)(void*), void*) /home/rcorre/src/godot/godot/core/os/thread.cpp:61:2 (godot.linuxbsd.editor.x86_64.llvm.san+0x9464ab0) (BuildId: 780a9db7c37d88e78d5ee659c4fa1cd378abd048)
    #2 void std::__invoke_impl<void, void (*)(unsigned long, Thread::Settings const&, void (*)(void*), void*), unsigned long, Thread::Settings, void (*)(void*), void*>(std::__invoke_other, void (*&&)(unsigned long, Thread::Settings const&, void (*)(void*), void*), unsigned long&&, Thread::Settings&&, void (*&&)(void*), void*&&) /usr/bin/../lib64/gcc/x86_64-pc-linux-gnu/12.2.1/../../../../include/c++/12.2.1/bits/invoke.h:61:14 (godot.linuxbsd.editor.x86_64.llvm.san+0x9465283) (BuildId: 780a9db7c37d88e78d5ee659c4fa1cd378abd048)
    #3 std::__invoke_result<void (*)(unsigned long, Thread::Settings const&, void (*)(void*), void*), unsigned long, Thread::Settings, void (*)(void*), void*>::type std::__invoke<void (*)(unsigned long, Thread::Settings const&, void (*)(void*), void*), unsigned long, Thread::Settings, void (*)(void*), void*>(void (*&&)(unsigned long, Thread::Settings const&, void (*)(void*), void*), unsigned long&&, Thread::Settings&&, void (*&&)(void*), void*&&) /usr/bin/../lib64/gcc/x86_64-pc-linux-gnu/12.2.1/../../../../include/c++/12.2.1/bits/invoke.h:96:14 (godot.linuxbsd.editor.x86_64.llvm.san+0x9465283)
    #4 void std:🧵:_Invoker<std::tuple<void (*)(unsigned long, Thread::Settings const&, void (*)(void*), void*), unsigned long, Thread::Settings, void (*)(void*), void*>>::_M_invoke<0ul, 1ul, 2ul, 3ul, 4ul>(std::_Index_tuple<0ul, 1ul, 2ul, 3ul, 4ul>) /usr/bin/../lib64/gcc/x86_64-pc-linux-gnu/12.2.1/../../../../include/c++/12.2.1/bits/std_thread.h:258:13 (godot.linuxbsd.editor.x86_64.llvm.san+0x9465283)
    #5 std:🧵:_Invoker<std::tuple<void (*)(unsigned long, Thread::Settings const&, void (*)(void*), void*), unsigned long, Thread::Settings, void (*)(void*), void*>>::operator()() /usr/bin/../lib64/gcc/x86_64-pc-linux-gnu/12.2.1/../../../../include/c++/12.2.1/bits/std_thread.h:265:11 (godot.linuxbsd.editor.x86_64.llvm.san+0x9465283)
    #6 std:🧵:_State_impl<std:🧵:_Invoker<std::tuple<void (*)(unsigned long, Thread::Settings const&, void (*)(void*), void*), unsigned long, Thread::Settings, void (*)(void*), void*>>>::_M_run() /usr/bin/../lib64/gcc/x86_64-pc-linux-gnu/12.2.1/../../../../include/c++/12.2.1/bits/std_thread.h:210:13 (godot.linuxbsd.editor.x86_64.llvm.san+0x9465283)
    #7 execute_native_thread_routine /usr/src/debug/gcc/gcc/libstdc++-v3/src/c++11/thread.cc:82:18 (libstdc++.so.6+0xd72c2) (BuildId: 6fe66a2d539a78c993bd2d377e00fad389220963)

  Location is global 'ScriptServer::_language_count' of size 4 at 0x55615b187cd0 (godot.linuxbsd.editor.x86_64.llvm.san+0xbf46cd0)

  Thread T1 (tid=9431, running) created by main thread at:
    #0 pthread_create <null> (godot.linuxbsd.editor.x86_64.llvm.san+0x2de5776) (BuildId: 780a9db7c37d88e78d5ee659c4fa1cd378abd048)
    #1 __gthread_create /usr/src/debug/gcc/gcc-build/x86_64-pc-linux-gnu/libstdc++-v3/include/x86_64-pc-linux-gnu/bits/gthr-default.h:663:35 (libstdc++.so.6+0xd73a9) (BuildId: 6fe66a2d539a78c993bd2d377e00fad389220963)
    #2 std:🧵:_M_start_thread(std::unique_ptr<std:🧵:_State, std::default_delete<std:🧵:_State>>, void (*)()) /usr/src/debug/gcc/gcc/libstdc++-v3/src/c++11/thread.cc:147:37 (libstdc++.so.6+0xd73a9)
    #3 IP::IP() /home/rcorre/src/godot/godot/core/io/ip.cpp:347:19 (godot.linuxbsd.editor.x86_64.llvm.san+0x962cbcd) (BuildId: 780a9db7c37d88e78d5ee659c4fa1cd378abd048)
    #4 IPUnix::IPUnix() /home/rcorre/src/godot/godot/drivers/unix/ip_unix.cpp:261:9 (godot.linuxbsd.editor.x86_64.llvm.san+0x4aee599) (BuildId: 780a9db7c37d88e78d5ee659c4fa1cd378abd048)
    #5 IPUnix::_create_unix() /home/rcorre/src/godot/godot/drivers/unix/ip_unix.cpp:258:9 (godot.linuxbsd.editor.x86_64.llvm.san+0x4aee599)
    #6 IP::create() /home/rcorre/src/godot/godot/core/io/ip.cpp:339:9 (godot.linuxbsd.editor.x86_64.llvm.san+0x962ca5e) (BuildId: 780a9db7c37d88e78d5ee659c4fa1cd378abd048)
    #7 register_core_types() /home/rcorre/src/godot/godot/core/register_core_types.cpp:279:7 (godot.linuxbsd.editor.x86_64.llvm.san+0x93e2333) (BuildId: 780a9db7c37d88e78d5ee659c4fa1cd378abd048)
    #8 Main::setup(char const*, int, char**, bool) /home/rcorre/src/godot/godot/main/main.cpp:690:2 (godot.linuxbsd.editor.x86_64.llvm.san+0x2f08a49) (BuildId: 780a9db7c37d88e78d5ee659c4fa1cd378abd048)
    #9 main /home/rcorre/src/godot/godot/platform/linuxbsd/godot_linuxbsd.cpp:61:14 (godot.linuxbsd.editor.x86_64.llvm.san+0x2e67e1f) (BuildId: 780a9db7c37d88e78d5ee659c4fa1cd378abd048)

SUMMARY: ThreadSanitizer: data race /home/rcorre/src/godot/godot/core/object/script_language.cpp:177:28 in ScriptServer::register_language(ScriptLanguage*)
```

Co-authored-by: Pedro J. Estébanez <RandomShaper@users.noreply.github.com>
2023-06-21 09:52:10 -04:00
..
callable_method_pointer.cpp One Copyright Update to rule them all 2023-01-05 13:25:55 +01:00
callable_method_pointer.h Complete support of callables of static methods 2023-04-12 18:12:19 +02:00
class_db.cpp Merge pull request #76446 from reduz/add-gdextension-api-compatibility 2023-05-15 13:43:46 +02:00
class_db.h Add a backwards-compatibility system for GDExtension method 2023-05-15 12:05:40 +02:00
make_virtuals.py CI: Update static checks to black 23.3.0 2023-06-19 23:33:02 +02:00
message_queue.cpp Fix message queue issues 2023-05-19 13:11:34 +02:00
message_queue.h Fix message queue issues 2023-05-19 13:11:34 +02:00
method_bind.cpp One Copyright Update to rule them all 2023-01-05 13:25:55 +01:00
method_bind.h Add ValidatedCall to MethodBind 2023-04-30 20:01:26 +02:00
object.cpp Fix wrapping Object's in GDExtension that aren't exposed 2023-06-09 13:41:57 -05:00
object.h Fix wrapping Object's in GDExtension that aren't exposed 2023-06-09 13:41:57 -05:00
object_id.h One Copyright Update to rule them all 2023-01-05 13:25:55 +01:00
ref_counted.cpp One Copyright Update to rule them all 2023-01-05 13:25:55 +01:00
ref_counted.h Attempt to standardize Object ptrcall encoding on Object ** 2023-05-25 21:46:22 -05:00
script_language.cpp Fix race in ScriptServer. 2023-06-21 09:52:10 -04:00
script_language.h Fix race in ScriptServer. 2023-06-21 09:52:10 -04:00
script_language_extension.cpp Remove unused ScriptLanguage methods 2023-02-26 22:30:56 -08:00
script_language_extension.h Fix Ref<>.is_valid() for ScriptInstanceExtension 2023-06-20 19:45:47 +02:00
SCsub Implement native extension system 2021-06-25 17:32:45 -03:00
undo_redo.cpp fixes #76473, where filling a large amount of tiles all at once crashes 2023-06-18 22:32:23 +09:00
undo_redo.h add backward_undo_ops as property for action 2023-06-13 15:32:05 +02:00
worker_thread_pool.cpp Let user scripts disable thread safety checks 2023-06-09 18:24:01 +02:00
worker_thread_pool.h Avoid multiple possibilites of deadlock in resource loading 2023-05-17 01:52:39 +02:00