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8076225: Move the thread claim parity from SharedHeap to Thread

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Reviewed-by: brutisso, jwilhelm, kbarrett
This commit is contained in:
Mikael Gerdin 2015-03-31 07:54:56 +02:00
parent 0efa369ffb
commit 062cf882e0
6 changed files with 39 additions and 26 deletions
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24
hotspot/src/share/vm/runtime/thread.cpp
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@ -3183,6 +3183,7 @@ JavaThread* Threads::_thread_list = NULL;
int Threads::_number_of_threads = 0;
int Threads::_number_of_non_daemon_threads = 0;
int Threads::_return_code = 0;
int Threads::_thread_claim_parity = 0;
size_t JavaThread::_stack_size_at_create = 0;
#ifdef ASSERT
bool Threads::_vm_complete = false;
@ -3217,7 +3218,6 @@ void Threads::threads_do(ThreadClosure* tc) {
// If CompilerThreads ever become non-JavaThreads, add them here
}
void Threads::initialize_java_lang_classes(JavaThread* main_thread, TRAPS) {
TraceTime timer("Initialize java.lang classes", TraceStartupTime);
@ -4046,6 +4046,26 @@ void Threads::oops_do(OopClosure* f, CLDClosure* cld_f, CodeBlobClosure* cf) {
VMThread::vm_thread()->oops_do(f, cld_f, cf);
}
void Threads::change_thread_claim_parity() {
// Set the new claim parity.
assert(_thread_claim_parity >= 0 && _thread_claim_parity <= 2,
"Not in range.");
_thread_claim_parity++;
if (_thread_claim_parity == 3) _thread_claim_parity = 1;
assert(_thread_claim_parity >= 1 && _thread_claim_parity <= 2,
"Not in range.");
}
#ifndef PRODUCT
void Threads::assert_all_threads_claimed() {
ALL_JAVA_THREADS(p) {
const int thread_parity = p->oops_do_parity();
assert((thread_parity == _thread_claim_parity),
err_msg("Thread " PTR_FORMAT " has incorrect parity %d != %d", p2i(p), thread_parity, _thread_claim_parity));
}
}
#endif // PRODUCT
void Threads::possibly_parallel_oops_do(OopClosure* f, CLDClosure* cld_f, CodeBlobClosure* cf) {
// Introduce a mechanism allowing parallel threads to claim threads as
// root groups. Overhead should be small enough to use all the time,
@ -4060,7 +4080,7 @@ void Threads::possibly_parallel_oops_do(OopClosure* f, CLDClosure* cld_f, CodeBl
assert(!is_par ||
(SharedHeap::heap()->n_par_threads() ==
SharedHeap::heap()->workers()->active_workers()), "Mismatch");
int cp = SharedHeap::heap()->strong_roots_parity();
int cp = Threads::thread_claim_parity();
ALL_JAVA_THREADS(p) {
if (p->claim_oops_do(is_par, cp)) {
p->oops_do(f, cld_f, cf);