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8132510: Replace ThreadLocalStorage with compiler/language-based thread-local variables

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Used compiled-based TLS when available. Additional contributions by Thomas Stufe (AIX) and Andrew Haley (Aarch64)

Reviewed-by: stuefe, bdelsart, dcubed
This commit is contained in:
David Holmes 2015-12-04 04:06:37 -05:00
parent 8929fdddb8
commit 6e0ea9d21c
101 changed files with 449 additions and 1966 deletions
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39
hotspot/src/os/linux/vm/os_linux.cpp
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@ -646,7 +646,7 @@ static void *java_start(Thread *thread) {
int pid = os::current_process_id();
alloca(((pid ^ counter++) & 7) * 128);
ThreadLocalStorage::set_thread(thread);
thread->initialize_thread_current();
OSThread* osthread = thread->osthread();
Monitor* sync = osthread->startThread_lock();
@ -873,43 +873,6 @@ void os::free_thread(OSThread* osthread) {
delete osthread;
}
//////////////////////////////////////////////////////////////////////////////
// thread local storage
// Restore the thread pointer if the destructor is called. This is in case
// someone from JNI code sets up a destructor with pthread_key_create to run
// detachCurrentThread on thread death. Unless we restore the thread pointer we
// will hang or crash. When detachCurrentThread is called the key will be set
// to null and we will not be called again. If detachCurrentThread is never
// called we could loop forever depending on the pthread implementation.
static void restore_thread_pointer(void* p) {
Thread* thread = (Thread*) p;
os::thread_local_storage_at_put(ThreadLocalStorage::thread_index(), thread);
}
int os::allocate_thread_local_storage() {
pthread_key_t key;
int rslt = pthread_key_create(&key, restore_thread_pointer);
assert(rslt == 0, "cannot allocate thread local storage");
return (int)key;
}
// Note: This is currently not used by VM, as we don't destroy TLS key
// on VM exit.
void os::free_thread_local_storage(int index) {
int rslt = pthread_key_delete((pthread_key_t)index);
assert(rslt == 0, "invalid index");
}
void os::thread_local_storage_at_put(int index, void* value) {
int rslt = pthread_setspecific((pthread_key_t)index, value);
assert(rslt == 0, "pthread_setspecific failed");
}
extern "C" Thread* get_thread() {
return ThreadLocalStorage::thread();
}
//////////////////////////////////////////////////////////////////////////////
// initial thread