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8195103: Refactor out card table from CardTableModRefBS to flatten the BarrierSet hierarchy

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Reviewed-by: kbarrett, tschatzl
This commit is contained in:
Erik Österlund 2018-01-10 22:48:27 +01:00
parent ceb48aba9b
commit 0fb7dffb83
32 changed files with 282 additions and 372 deletions
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27
src/hotspot/share/jvmci/jvmciRuntime.cpp
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@ -116,10 +116,7 @@ JRT_BLOCK_ENTRY(void, JVMCIRuntime::new_instance(JavaThread* thread, Klass* klas
oop obj = ik->allocate_instance(CHECK);
thread->set_vm_result(obj);
JRT_BLOCK_END;
if (ReduceInitialCardMarks) {
new_store_pre_barrier(thread);
}
SharedRuntime::on_slowpath_allocation_exit(thread);
JRT_END
JRT_BLOCK_ENTRY(void, JVMCIRuntime::new_array(JavaThread* thread, Klass* array_klass, jint length))
@ -151,29 +148,9 @@ JRT_BLOCK_ENTRY(void, JVMCIRuntime::new_array(JavaThread* thread, Klass* array_k
}
}
JRT_BLOCK_END;
if (ReduceInitialCardMarks) {
new_store_pre_barrier(thread);
}
SharedRuntime::on_slowpath_allocation_exit(thread);
JRT_END
void JVMCIRuntime::new_store_pre_barrier(JavaThread* thread) {
// After any safepoint, just before going back to compiled code,
// we inform the GC that we will be doing initializing writes to
// this object in the future without emitting card-marks, so
// GC may take any compensating steps.
// NOTE: Keep this code consistent with GraphKit::store_barrier.
oop new_obj = thread->vm_result();
if (new_obj == NULL) return;
assert(Universe::heap()->can_elide_tlab_store_barriers(),
"compiler must check this first");
// GC may decide to give back a safer copy of new_obj.
new_obj = Universe::heap()->new_store_pre_barrier(thread, new_obj);
thread->set_vm_result(new_obj);
}
JRT_ENTRY(void, JVMCIRuntime::new_multi_array(JavaThread* thread, Klass* klass, int rank, jint* dims))
assert(klass->is_klass(), "not a class");
assert(rank >= 1, "rank must be nonzero");