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8171392: Move Klass pointers outside of ConstantPool entries so ConstantPool can be read-only

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Added _resolved_klasses; moved _resolved_references to ConstantPoolCache, etc.

Reviewed-by: coleenp, lfoltan, simonis, aph
This commit is contained in:
Ioi Lam 2017-03-03 23:08:35 -08:00
parent 0c74ceb12d
commit c386cec7b1
32 changed files with 527 additions and 231 deletions
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12
hotspot/src/cpu/arm/vm/interp_masm_arm.cpp
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@ -298,7 +298,8 @@ void InterpreterMacroAssembler::load_resolved_reference_at_index(
Register cache = result;
// load pointer for resolved_references[] objArray
ldr(cache, Address(result, ConstantPool::resolved_references_offset_in_bytes()));
ldr(cache, Address(result, ConstantPool::cache_offset_in_bytes()));
ldr(cache, Address(result, ConstantPoolCache::resolved_references_offset_in_bytes()));
// JNIHandles::resolve(result)
ldr(cache, Address(cache, 0));
// Add in the index
@ -308,6 +309,15 @@ void InterpreterMacroAssembler::load_resolved_reference_at_index(
load_heap_oop(result, Address(cache, arrayOopDesc::base_offset_in_bytes(T_OBJECT)));
}
void InterpreterMacroAssembler::load_resolved_klass_at_offset(
Register Rcpool, Register Rindex, Register Rklass) {
add(Rtemp, Rcpool, AsmOperand(Rindex, lsl, LogBytesPerWord));
ldrh(Rtemp, Address(Rtemp, sizeof(ConstantPool))); // Rtemp = resolved_klass_index
ldr(Rklass, Address(Rcpool, ConstantPool::resolved_klasses_offset_in_bytes())); // Rklass = cpool->_resolved_klasses
add(Rklass, Rklass, AsmOperand(Rtemp, lsl, LogBytesPerWord));
ldr(Rklass, Address(Rklass, Array<Klass*>::base_offset_in_bytes()));
}
// Generate a subtype check: branch to not_subtype if sub_klass is
// not a subtype of super_klass.
// Profiling code for the subtype check failure (profile_typecheck_failed)