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src/hotspot/cpu/x86/gc/shenandoah/shenandoahBarrierSetAssembler_x86.cpp

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rev 55538 : 8226757: Shenandoah: Make Traversal a separate mode


  52   bool obj_int = type == T_OBJECT LP64_ONLY(&& UseCompressedOops);
  53   bool dest_uninitialized = (decorators & IS_DEST_UNINITIALIZED) != 0;
  54 
  55   if (type == T_OBJECT || type == T_ARRAY) {
  56 #ifdef _LP64
  57     if (!checkcast) {
  58       if (!obj_int) {
  59         // Save count for barrier
  60         __ movptr(r11, count);
  61       } else if (disjoint) {
  62         // Save dst in r11 in the disjoint case
  63         __ movq(r11, dst);
  64       }
  65     }
  66 #else
  67     if (disjoint) {
  68       __ mov(rdx, dst);          // save 'to'
  69     }
  70 #endif
  71 
  72     if (ShenandoahSATBBarrier && !dest_uninitialized && !ShenandoahHeap::heap()->heuristics()->can_do_traversal_gc()) {
  73       Register thread = NOT_LP64(rax) LP64_ONLY(r15_thread);
  74       assert_different_registers(dst, count, thread); // we don't care about src here?
  75 #ifndef _LP64
  76       __ push(thread);
  77       __ get_thread(thread);
  78 #endif
  79 
  80       Label done;
  81       // Short-circuit if count == 0.
  82       __ testptr(count, count);
  83       __ jcc(Assembler::zero, done);
  84 
  85       // Avoid runtime call when not marking.
  86       Address gc_state(thread, in_bytes(ShenandoahThreadLocalData::gc_state_offset()));
  87       __ testb(gc_state, ShenandoahHeap::MARKING);
  88       __ jcc(Assembler::zero, done);
  89 
  90       __ pusha();                      // push registers
  91 #ifdef _LP64
  92       if (count == c_rarg0) {




  52   bool obj_int = type == T_OBJECT LP64_ONLY(&& UseCompressedOops);
  53   bool dest_uninitialized = (decorators & IS_DEST_UNINITIALIZED) != 0;
  54 
  55   if (type == T_OBJECT || type == T_ARRAY) {
  56 #ifdef _LP64
  57     if (!checkcast) {
  58       if (!obj_int) {
  59         // Save count for barrier
  60         __ movptr(r11, count);
  61       } else if (disjoint) {
  62         // Save dst in r11 in the disjoint case
  63         __ movq(r11, dst);
  64       }
  65     }
  66 #else
  67     if (disjoint) {
  68       __ mov(rdx, dst);          // save 'to'
  69     }
  70 #endif
  71 
  72     if (ShenandoahSATBBarrier && !dest_uninitialized) {
  73       Register thread = NOT_LP64(rax) LP64_ONLY(r15_thread);
  74       assert_different_registers(dst, count, thread); // we don't care about src here?
  75 #ifndef _LP64
  76       __ push(thread);
  77       __ get_thread(thread);
  78 #endif
  79 
  80       Label done;
  81       // Short-circuit if count == 0.
  82       __ testptr(count, count);
  83       __ jcc(Assembler::zero, done);
  84 
  85       // Avoid runtime call when not marking.
  86       Address gc_state(thread, in_bytes(ShenandoahThreadLocalData::gc_state_offset()));
  87       __ testb(gc_state, ShenandoahHeap::MARKING);
  88       __ jcc(Assembler::zero, done);
  89 
  90       __ pusha();                      // push registers
  91 #ifdef _LP64
  92       if (count == c_rarg0) {
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