Sat, 28 Mar 2009 15:47:29 -0700
6819891: ParNew: Fix work queue overflow code to deal correctly with +UseCompressedOops
Summary: When using compressed oops, rather than chaining the overflowed grey objects' pre-images through their klass words, we use GC-worker thread-local overflow stacks.
Reviewed-by: jcoomes, jmasa
1 /*
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25 # include "incls/_precompiled.incl"
26 # include "incls/_threadLocalStorage.cpp.incl"
28 // static member initialization
29 int ThreadLocalStorage::_thread_index = -1;
31 Thread* ThreadLocalStorage::get_thread_slow() {
32 return (Thread*) os::thread_local_storage_at(ThreadLocalStorage::thread_index());
33 }
35 void ThreadLocalStorage::set_thread(Thread* thread) {
36 pd_set_thread(thread);
38 // The following ensure that any optimization tricks we have tried
39 // did not backfire on us:
40 guarantee(get_thread() == thread, "must be the same thread, quickly");
41 guarantee(get_thread_slow() == thread, "must be the same thread, slowly");
42 }
44 void ThreadLocalStorage::init() {
45 assert(!is_initialized(),
46 "More than one attempt to initialize threadLocalStorage");
47 pd_init();
48 set_thread_index(os::allocate_thread_local_storage());
49 generate_code_for_get_thread();
50 }
52 bool ThreadLocalStorage::is_initialized() {
53 return (thread_index() != -1);
54 }