C++ (Cpp) KlassHandle::super_check_offsetの例

コード例 #1

ファイル: methodHandles_aarch64.cpp プロジェクト: campolake/openjdk9

void MethodHandles::verify_klass(MacroAssembler* _masm,
                                 Register obj, SystemDictionary::WKID klass_id,
                                 const char* error_message) {
  InstanceKlass** klass_addr = SystemDictionary::well_known_klass_addr(klass_id);
  KlassHandle klass = SystemDictionary::well_known_klass(klass_id);
  Register temp = rscratch2;
  Register temp2 = rscratch1; // used by MacroAssembler::cmpptr
  Label L_ok, L_bad;
  BLOCK_COMMENT("verify_klass {");
  __ verify_oop(obj);
  __ cbz(obj, L_bad);
  __ push(RegSet::of(temp, temp2), sp);
  __ load_klass(temp, obj);
  __ cmpptr(temp, ExternalAddress((address) klass_addr));
  __ br(Assembler::EQ, L_ok);
  intptr_t super_check_offset = klass->super_check_offset();
  __ ldr(temp, Address(temp, super_check_offset));
  __ cmpptr(temp, ExternalAddress((address) klass_addr));
  __ br(Assembler::EQ, L_ok);
  __ pop(RegSet::of(temp, temp2), sp);
  __ bind(L_bad);
  __ stop(error_message);
  __ BIND(L_ok);
  __ pop(RegSet::of(temp, temp2), sp);
  BLOCK_COMMENT("} verify_klass");
}

コード例 #2

ファイル: methodHandles_x86.cpp プロジェクト: pombreda/graal

void MethodHandles::verify_klass(MacroAssembler* _masm,
                                 Register obj, SystemDictionary::WKID klass_id,
                                 const char* error_message) {
  Klass** klass_addr = SystemDictionary::well_known_klass_addr(klass_id);
  KlassHandle klass = SystemDictionary::well_known_klass(klass_id);
  Register temp = rdi;
  Register temp2 = noreg;
  LP64_ONLY(temp2 = rscratch1);  // used by MacroAssembler::cmpptr
  Label L_ok, L_bad;
  BLOCK_COMMENT("verify_klass {");
  __ verify_oop(obj);
  __ testptr(obj, obj);
  __ jcc(Assembler::zero, L_bad);
  __ push(temp); if (temp2 != noreg)  __ push(temp2);
#define UNPUSH { if (temp2 != noreg)  __ pop(temp2);  __ pop(temp); }
  __ load_klass(temp, obj);
  __ cmpptr(temp, ExternalAddress((address) klass_addr));
  __ jcc(Assembler::equal, L_ok);
  intptr_t super_check_offset = klass->super_check_offset();
  __ movptr(temp, Address(temp, super_check_offset));
  __ cmpptr(temp, ExternalAddress((address) klass_addr));
  __ jcc(Assembler::equal, L_ok);
  UNPUSH;
  __ bind(L_bad);
  __ STOP(error_message);
  __ BIND(L_ok);
  UNPUSH;
  BLOCK_COMMENT("} verify_klass");
}

コード例 #3

ファイル: methodHandles_ppc.cpp プロジェクト: shelan/jdk9-mirror

void MethodHandles::verify_klass(MacroAssembler* _masm,
                                 Register obj_reg, SystemDictionary::WKID klass_id,
                                 Register temp_reg, Register temp2_reg,
                                 const char* error_message) {
  Klass** klass_addr = SystemDictionary::well_known_klass_addr(klass_id);
  KlassHandle klass = SystemDictionary::well_known_klass(klass_id);
  Label L_ok, L_bad;
  BLOCK_COMMENT("verify_klass {");
  __ verify_oop(obj_reg);
  __ cmpdi(CCR0, obj_reg, 0);
  __ beq(CCR0, L_bad);
  __ load_klass(temp_reg, obj_reg);
  __ load_const_optimized(temp2_reg, (address) klass_addr);
  __ ld(temp2_reg, 0, temp2_reg);
  __ cmpd(CCR0, temp_reg, temp2_reg);
  __ beq(CCR0, L_ok);
  __ ld(temp_reg, klass->super_check_offset(), temp_reg);
  __ cmpd(CCR0, temp_reg, temp2_reg);
  __ beq(CCR0, L_ok);
  __ BIND(L_bad);
  __ stop(error_message);
  __ BIND(L_ok);
  BLOCK_COMMENT("} verify_klass");
}