archive/jdk
1
0
Fork 0
mirror of https://github.com/openjdk/jdk.git synced 2025-08-28 15:24:43 +02:00
Code Issues Projects Releases Packages Wiki Activity Actions

8213436: Obsolete UseMembar

Browse source 
Reviewed-by: kvn, dholmes, mdoerr, adinn
This commit is contained in:
Mikael Vidstedt 2018-11-08 11:45:13 -08:00
parent 38a1e5ffbc
commit f69921f2fc
57 changed files with 43 additions and 655 deletions
Download patch file Download diff file Expand all files Collapse all files

16
src/hotspot/share/runtime/interfaceSupport.inline.hpp
View file

@ -79,17 +79,7 @@ class InterfaceSupport: AllStatic {
private:
static void serialize_thread_state_internal(JavaThread* thread, bool needs_exception_handler) {
// Make sure new state is seen by VM thread
if (UseMembar) {
// Force a fence between the write above and read below
OrderAccess::fence();
} else {
// store to serialize page so VM thread can do pseudo remote membar
if (needs_exception_handler) {
os::write_memory_serialize_page_with_handler(thread);
} else {
os::write_memory_serialize_page(thread);
}
}
OrderAccess::fence();
}
};
@ -126,9 +116,7 @@ class ThreadStateTransition : public StackObj {
// transition_and_fence must be used on any thread state transition
// where there might not be a Java call stub on the stack, in
// particular on Windows where the Structured Exception Handler is
// set up in the call stub. os::write_memory_serialize_page() can
// fault and we can't recover from it on Windows without a SEH in
// place.
// set up in the call stub.
static inline void transition_and_fence(JavaThread *thread, JavaThreadState from, JavaThreadState to) {
assert(thread->thread_state() == from, "coming from wrong thread state");
assert((from & 1) == 0 && (to & 1) == 0, "odd numbers are transitions states");