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Merge pull request #78977 from RandomShaper/workaround_tls_shutdown

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Workaround resource loading crashes due to buggy TLS
This commit is contained in:
Rémi Verschelde 2023-07-03 19:43:07 +02:00 committed by GitHub
commit cdd2313ba2
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GPG Key ID: 4AEE18F83AFDEB23
2 changed files with 14 additions and 9 deletions
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19
core/io/resource_loader.cpp
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@ -239,15 +239,15 @@ ResourceLoader::LoadToken::~LoadToken() {
Ref<Resource> ResourceLoader::_load(const String &p_path, const String &p_original_path, const String &p_type_hint, ResourceFormatLoader::CacheMode p_cache_mode, Error *r_error, bool p_use_sub_threads, float *r_progress) {
load_nesting++;
if (load_paths_stack.size()) {
if (load_paths_stack->size()) {
thread_load_mutex.lock();
HashMap<String, ThreadLoadTask>::Iterator E = thread_load_tasks.find(load_paths_stack[load_paths_stack.size() - 1]);
HashMap<String, ThreadLoadTask>::Iterator E = thread_load_tasks.find(load_paths_stack->get(load_paths_stack->size() - 1));
if (E) {
E->value.sub_tasks.insert(p_path);
}
thread_load_mutex.unlock();
}
load_paths_stack.push_back(p_path);
load_paths_stack->push_back(p_path);
// Try all loaders and pick the first match for the type hint
bool found = false;
@ -263,7 +263,7 @@ Ref<Resource> ResourceLoader::_load(const String &p_path, const String &p_origin
}
}
load_paths_stack.resize(load_paths_stack.size() - 1);
load_paths_stack->resize(load_paths_stack->size() - 1);
load_nesting--;
if (!res.is_null()) {
@ -296,8 +296,10 @@ void ResourceLoader::_thread_load_function(void *p_userdata) {
// Thread-safe either if it's the current thread or a brand new one.
CallQueue *mq_override = nullptr;
if (load_nesting == 0) {
load_paths_stack = memnew(Vector<String>);
if (!load_task.dependent_path.is_empty()) {
load_paths_stack.push_back(load_task.dependent_path);
load_paths_stack->push_back(load_task.dependent_path);
}
if (!Thread::is_main_thread()) {
mq_override = memnew(CallQueue);
@ -360,9 +362,12 @@ void ResourceLoader::_thread_load_function(void *p_userdata) {
thread_load_mutex.unlock();
if (load_nesting == 0 && mq_override) {
if (load_nesting == 0) {
if (mq_override) {
memdelete(mq_override);
}
memdelete(load_paths_stack);
}
}
static String _validate_local_path(const String &p_path) {
@ -1170,7 +1175,7 @@ bool ResourceLoader::timestamp_on_load = false;
thread_local int ResourceLoader::load_nesting = 0;
thread_local WorkerThreadPool::TaskID ResourceLoader::caller_task_id = 0;
thread_local Vector<String> ResourceLoader::load_paths_stack;
thread_local Vector<String> *ResourceLoader::load_paths_stack;
template <>
thread_local uint32_t SafeBinaryMutex<ResourceLoader::BINARY_MUTEX_TAG>::count = 0;

2
core/io/resource_loader.h
View File

@ -182,7 +182,7 @@ private:
static thread_local int load_nesting;
static thread_local WorkerThreadPool::TaskID caller_task_id;
static thread_local Vector<String> load_paths_stack;
static thread_local Vector<String> *load_paths_stack; // A pointer to avoid broken TLS implementations from double-running the destructor.
static SafeBinaryMutex<BINARY_MUTEX_TAG> thread_load_mutex;
static HashMap<String, ThreadLoadTask> thread_load_tasks;
static bool cleaning_tasks;