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comparison src/cpu/x86/vm/sharedRuntime_x86_64.cpp @ 848:fe95187e8882

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6859338: amd64 native unverified entry point pushes values before implicit null check Reviewed-by: kvn, twisti
author never
date Mon, 13 Jul 2009 14:58:17 -0700
parents 69aefafe69c1
children e66fd840cb6b
comparison
equal deleted inserted replaced
834:0f2d888530e7 848:fe95187e8882
1300 // as far as the interpreter and the compiler(s) are concerned. 1300 // as far as the interpreter and the compiler(s) are concerned.
1301 1301
1302 1302
1303 const Register ic_reg = rax; 1303 const Register ic_reg = rax;
1304 const Register receiver = j_rarg0; 1304 const Register receiver = j_rarg0;
1305 const Register tmp = rdx;
1306 1305
1307 Label ok; 1306 Label ok;
1308 Label exception_pending; 1307 Label exception_pending;
1309 1308
1309 assert_different_registers(ic_reg, receiver, rscratch1);
1310 __ verify_oop(receiver); 1310 __ verify_oop(receiver);
1311 __ push(tmp); // spill (any other registers free here???) 1311 __ load_klass(rscratch1, receiver);
1312 __ load_klass(tmp, receiver); 1312 __ cmpq(ic_reg, rscratch1);
1313 __ cmpq(ic_reg, tmp);
1314 __ jcc(Assembler::equal, ok); 1313 __ jcc(Assembler::equal, ok);
1315 1314
1316 __ pop(tmp);
1317 __ jump(RuntimeAddress(SharedRuntime::get_ic_miss_stub())); 1315 __ jump(RuntimeAddress(SharedRuntime::get_ic_miss_stub()));
1318 1316
1319 __ bind(ok); 1317 __ bind(ok);
1320 __ pop(tmp);
1321 1318
1322 // Verified entry point must be aligned 1319 // Verified entry point must be aligned
1323 __ align(8); 1320 __ align(8);
1324 1321
1325 int vep_offset = ((intptr_t)__ pc()) - start; 1322 int vep_offset = ((intptr_t)__ pc()) - start;