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8029396: PPC64 (part 212): Several memory ordering fixes in C-code

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Memory ordering fixes in GC and other runtime code showing on PPC64.

Reviewed-by: kvn, coleenp
This commit is contained in:
Goetz Lindenmaier 2013-12-02 10:26:14 +01:00
parent 1b2bf0be10
commit 46c4ef6572
16 changed files with 99 additions and 34 deletions
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10
hotspot/src/share/vm/runtime/thread.hpp
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@ -1044,8 +1044,14 @@ class JavaThread: public Thread {
address last_Java_pc(void) { return _anchor.last_Java_pc(); }
// Safepoint support
JavaThreadState thread_state() const { return _thread_state; }
void set_thread_state(JavaThreadState s) { _thread_state=s; }
// Use membars when accessing volatile _thread_state. See
// Threads::create_vm() for size checks.
JavaThreadState thread_state() const {
return (JavaThreadState) OrderAccess::load_acquire((volatile jint*)&_thread_state);
}
void set_thread_state(JavaThreadState s) {
OrderAccess::release_store((volatile jint*)&_thread_state, (jint)s);
}
ThreadSafepointState *safepoint_state() const { return _safepoint_state; }
void set_safepoint_state(ThreadSafepointState *state) { _safepoint_state = state; }
bool is_at_poll_safepoint() { return _safepoint_state->is_at_poll_safepoint(); }