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8158850: [JVMCI] be more precise when enforcing OopMapValue encoding limitations

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Reviewed-by: kvn
This commit is contained in:
Tom Rodriguez 2016-06-22 22:39:32 +00:00
parent 1e3a876d37
commit d64a4e7df3
10 changed files with 217 additions and 29 deletions
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6
hotspot/src/share/vm/jvmci/jvmciCompilerToVM.cpp
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@ -113,6 +113,7 @@ uintptr_t CompilerToVM::Data::Universe_verify_oop_bits;
bool CompilerToVM::Data::_supports_inline_contig_alloc;
HeapWord** CompilerToVM::Data::_heap_end_addr;
HeapWord** CompilerToVM::Data::_heap_top_addr;
int CompilerToVM::Data::_max_oop_map_stack_offset;
jbyte* CompilerToVM::Data::cardtable_start_address;
int CompilerToVM::Data::cardtable_shift;
@ -154,6 +155,11 @@ void CompilerToVM::Data::initialize() {
_heap_end_addr = _supports_inline_contig_alloc ? Universe::heap()->end_addr() : (HeapWord**) -1;
_heap_top_addr = _supports_inline_contig_alloc ? Universe::heap()->top_addr() : (HeapWord**) -1;
_max_oop_map_stack_offset = (OopMapValue::register_mask - VMRegImpl::stack2reg(0)->value()) * VMRegImpl::stack_slot_size;
int max_oop_map_stack_index = _max_oop_map_stack_offset / VMRegImpl::stack_slot_size;
assert(OopMapValue::legal_vm_reg_name(VMRegImpl::stack2reg(max_oop_map_stack_index)), "should be valid");
assert(!OopMapValue::legal_vm_reg_name(VMRegImpl::stack2reg(max_oop_map_stack_index + 1)), "should be invalid");
BarrierSet* bs = Universe::heap()->barrier_set();
switch (bs->kind()) {
case BarrierSet::CardTableModRef: