Mercurial > hg > graal-jvmci-8
view src/cpu/sparc/vm/c1_FrameMap_sparc.hpp @ 3249:e1162778c1c8
7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
Summary: A referent object that is only weakly reachable at the start of concurrent marking but is re-attached to the strongly reachable object graph during marking may not be marked as live. This can cause the reference object to be processed prematurely and leave dangling pointers to the referent object. Implement a read barrier for the java.lang.ref.Reference::referent field by intrinsifying the Reference.get() method, and intercepting accesses though JNI, reflection, and Unsafe, so that when a non-null referent object is read it is also logged in an SATB buffer.
Reviewed-by: kvn, iveresov, never, tonyp, dholmes
| author | johnc |
|---|---|
| date | Thu, 07 Apr 2011 09:53:20 -0700 |
| parents | ac637b7220d1 |
| children | 8a02ca5e5576 |
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/* * Copyright (c) 1999, 2010, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. * */ #ifndef CPU_SPARC_VM_C1_FRAMEMAP_SPARC_HPP #define CPU_SPARC_VM_C1_FRAMEMAP_SPARC_HPP public: enum { nof_reg_args = 6, // registers o0-o5 are available for parameter passing first_available_sp_in_frame = frame::memory_parameter_word_sp_offset * BytesPerWord, frame_pad_in_bytes = 0 }; static const int pd_c_runtime_reserved_arg_size; static LIR_Opr G0_opr; static LIR_Opr G1_opr; static LIR_Opr G2_opr; static LIR_Opr G3_opr; static LIR_Opr G4_opr; static LIR_Opr G5_opr; static LIR_Opr G6_opr; static LIR_Opr G7_opr; static LIR_Opr O0_opr; static LIR_Opr O1_opr; static LIR_Opr O2_opr; static LIR_Opr O3_opr; static LIR_Opr O4_opr; static LIR_Opr O5_opr; static LIR_Opr O6_opr; static LIR_Opr O7_opr; static LIR_Opr L0_opr; static LIR_Opr L1_opr; static LIR_Opr L2_opr; static LIR_Opr L3_opr; static LIR_Opr L4_opr; static LIR_Opr L5_opr; static LIR_Opr L6_opr; static LIR_Opr L7_opr; static LIR_Opr I0_opr; static LIR_Opr I1_opr; static LIR_Opr I2_opr; static LIR_Opr I3_opr; static LIR_Opr I4_opr; static LIR_Opr I5_opr; static LIR_Opr I6_opr; static LIR_Opr I7_opr; static LIR_Opr SP_opr; static LIR_Opr FP_opr; static LIR_Opr G0_oop_opr; static LIR_Opr G1_oop_opr; static LIR_Opr G2_oop_opr; static LIR_Opr G3_oop_opr; static LIR_Opr G4_oop_opr; static LIR_Opr G5_oop_opr; static LIR_Opr G6_oop_opr; static LIR_Opr G7_oop_opr; static LIR_Opr O0_oop_opr; static LIR_Opr O1_oop_opr; static LIR_Opr O2_oop_opr; static LIR_Opr O3_oop_opr; static LIR_Opr O4_oop_opr; static LIR_Opr O5_oop_opr; static LIR_Opr O6_oop_opr; static LIR_Opr O7_oop_opr; static LIR_Opr L0_oop_opr; static LIR_Opr L1_oop_opr; static LIR_Opr L2_oop_opr; static LIR_Opr L3_oop_opr; static LIR_Opr L4_oop_opr; static LIR_Opr L5_oop_opr; static LIR_Opr L6_oop_opr; static LIR_Opr L7_oop_opr; static LIR_Opr I0_oop_opr; static LIR_Opr I1_oop_opr; static LIR_Opr I2_oop_opr; static LIR_Opr I3_oop_opr; static LIR_Opr I4_oop_opr; static LIR_Opr I5_oop_opr; static LIR_Opr I6_oop_opr; static LIR_Opr I7_oop_opr; static LIR_Opr in_long_opr; static LIR_Opr out_long_opr; static LIR_Opr g1_long_single_opr; static LIR_Opr F0_opr; static LIR_Opr F0_double_opr; static LIR_Opr Oexception_opr; static LIR_Opr Oissuing_pc_opr; private: static FloatRegister _fpu_regs [nof_fpu_regs]; static LIR_Opr as_long_single_opr(Register r) { return LIR_OprFact::double_cpu(cpu_reg2rnr(r), cpu_reg2rnr(r)); } static LIR_Opr as_long_pair_opr(Register r) { return LIR_OprFact::double_cpu(cpu_reg2rnr(r->successor()), cpu_reg2rnr(r)); } public: #ifdef _LP64 static LIR_Opr as_long_opr(Register r) { return as_long_single_opr(r); } static LIR_Opr as_pointer_opr(Register r) { return as_long_single_opr(r); } #else static LIR_Opr as_long_opr(Register r) { return as_long_pair_opr(r); } static LIR_Opr as_pointer_opr(Register r) { return as_opr(r); } #endif static LIR_Opr as_float_opr(FloatRegister r) { return LIR_OprFact::single_fpu(r->encoding()); } static LIR_Opr as_double_opr(FloatRegister r) { return LIR_OprFact::double_fpu(r->successor()->encoding(), r->encoding()); } static FloatRegister nr2floatreg (int rnr); static VMReg fpu_regname (int n); static bool is_caller_save_register (LIR_Opr reg); static bool is_caller_save_register (Register r); static int nof_caller_save_cpu_regs() { return pd_nof_caller_save_cpu_regs_frame_map; } static int last_cpu_reg() { return pd_last_cpu_reg; } #endif // CPU_SPARC_VM_C1_FRAMEMAP_SPARC_HPP