Godot crashes with --gdnative-generate-json-api flag

[devolonter]

Godot version:
3.3 RC9

OS/device including version:
OSX 11.2.3

Issue description:
When I try to run run godot --gdnative-generate-json-api api.json it outputs the following:

arguments
0: godot
1: --gdnative-generate-json-api
2: api.json

Godot Engine v3.3.rc9.official - https://godotengine.org
OpenGL ES 3.0 Renderer: AMD Radeon Pro 580X OpenGL Engine
OpenGL ES Batching: ON

Registered camera HD- FaceTime () with id 1 position 0 at index 0
libc++abi.dylib: terminating with uncaught exception of type std::__1::system_error: recursive_mutex lock failed: Invalid argument
Abort trap: 6

Steps to reproduce:
run godot --gdnative-generate-json-api api.json

[akien-mga]

I can't seem to reproduce it on Linux, might be macOS-specific. CC @godotengine/macos @godotengine/gdnative. Possibly related to #45618.

[bruvzg]

I can confirm this, api.json is generated, crash is triggered by exit(0) call.

godot/modules/gdnative/nativescript/nativescript.cpp

Line 1058 in 8e68f2e

exit(0);

libsystem_kernel.dylib!__pthread_kill (Unknown Source:0)
libsystem_pthread.dylib!pthread_kill (Unknown Source:0)
libsystem_c.dylib!abort (Unknown Source:0)
libc++abi.dylib!abort_message (Unknown Source:0)
libc++abi.dylib!demangling_terminate_handler() (Unknown Source:0)
libobjc.A.dylib!_objc_terminate() (Unknown Source:0)
libc++abi.dylib!std::__terminate(void (*)()) (Unknown Source:0)
libc++abi.dylib!std::terminate() (Unknown Source:0)
godot.osx.tools.x86_64!__clang_call_terminate (Unknown Source:0)
godot.osx.tools.x86_64!StringName::~StringName() (core/string_name.cpp:418)
godot.osx.tools.x86_64!StringName::~StringName() (core/string_name.cpp:416)
godot.osx.tools.x86_64!_GlobalConstant::~_GlobalConstant() (core/global_constants.cpp:38)
godot.osx.tools.x86_64!_GlobalConstant::~_GlobalConstant() (core/global_constants.cpp:38)
godot.osx.tools.x86_64!CowData<_GlobalConstant>::_unref(void*) (core/cowdata.h:212)
godot.osx.tools.x86_64!CowData<_GlobalConstant>::~CowData() (core/cowdata.h:388)
godot.osx.tools.x86_64!CowData<_GlobalConstant>::~CowData() (core/cowdata.h:386)
godot.osx.tools.x86_64!Vector<_GlobalConstant>::~Vector() (core/vector.h:126)
godot.osx.tools.x86_64!Vector<_GlobalConstant>::~Vector() (core/vector.h:126)
libsystem_c.dylib!__cxa_finalize_ranges (Unknown Source:0)
libsystem_c.dylib!exit (Unknown Source:0)
godot.osx.tools.x86_64!NativeScriptLanguage::init() (modules/gdnative/nativescript/nativescript.cpp:1058)
godot.osx.tools.x86_64!ScriptServer::init_languages() (core/script_language.cpp:177)
godot.osx.tools.x86_64!Main::setup2(unsigned long long) (main/main.cpp:1466)
godot.osx.tools.x86_64!Main::setup(char const*, int, char**, bool) (main/main.cpp:1229)
godot.osx.tools.x86_64!main (platform/osx/godot_main_osx.mm:64)
libdyld.dylib!start (Unknown Source:0)
libdyld.dylib!start (Unknown Source:0)

[bruvzg]

Probably it should have Main::cleanup(true); call before calling exit(0);.