Mercurial > hg > graal-jvmci-8
view src/cpu/zero/vm/bytecodeInterpreter_zero.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 | f95d63e2154a |
children | 4b95bbb36464 |
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/* * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved. * Copyright 2007, 2008 Red Hat, Inc. * 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_ZERO_VM_BYTECODEINTERPRETER_ZERO_HPP #define CPU_ZERO_VM_BYTECODEINTERPRETER_ZERO_HPP // Platform specific for C++ based Interpreter #if defined(PPC) || defined(SPARC) || defined(IA64) #define LOTS_OF_REGS // Use plenty of registers #else #undef LOTS_OF_REGS // Loser platforms #endif private: interpreterState _self_link; public: inline void set_locals(intptr_t* new_locals) { _locals = new_locals; } inline void set_method(methodOop new_method) { _method = new_method; } inline interpreterState self_link() { return _self_link; } inline void set_self_link(interpreterState new_self_link) { _self_link = new_self_link; } inline interpreterState prev_link() { return _prev_link; } inline void set_prev_link(interpreterState new_prev_link) { _prev_link = new_prev_link; } inline void set_stack_limit(intptr_t* new_stack_limit) { _stack_limit = new_stack_limit; } inline void set_stack_base(intptr_t* new_stack_base) { _stack_base = new_stack_base; } inline void set_monitor_base(BasicObjectLock *new_monitor_base) { _monitor_base = new_monitor_base; } inline void set_thread(JavaThread* new_thread) { _thread = new_thread; } inline void set_constants(constantPoolCacheOop new_constants) { _constants = new_constants; } inline oop oop_temp() { return _oop_temp; } inline oop *oop_temp_addr() { return &_oop_temp; } inline void set_oop_temp(oop new_oop_temp) { _oop_temp = new_oop_temp; } inline address callee_entry_point() { return _result._to_call._callee_entry_point; } inline address osr_buf() { return _result._osr._osr_buf; } inline address osr_entry() { return _result._osr._osr_entry; } public: const char *name_of_field_at_address(address addr); // The frame manager handles this #define SET_LAST_JAVA_FRAME() #define RESET_LAST_JAVA_FRAME() // ZeroStack Implementation #undef STACK_INT #undef STACK_FLOAT #undef STACK_ADDR #undef STACK_OBJECT #undef STACK_DOUBLE #undef STACK_LONG #define GET_STACK_SLOT(offset) (*((intptr_t*) &topOfStack[-(offset)])) #define STACK_SLOT(offset) ((address) &topOfStack[-(offset)]) #define STACK_ADDR(offset) (*((address *) &topOfStack[-(offset)])) #define STACK_INT(offset) (*((jint*) &topOfStack[-(offset)])) #define STACK_FLOAT(offset) (*((jfloat *) &topOfStack[-(offset)])) #define STACK_OBJECT(offset) (*((oop *) &topOfStack [-(offset)])) #define STACK_DOUBLE(offset) (((VMJavaVal64*) &topOfStack[-(offset)])->d) #define STACK_LONG(offset) (((VMJavaVal64 *) &topOfStack[-(offset)])->l) #define SET_STACK_SLOT(value, offset) (*(intptr_t*)&topOfStack[-(offset)] = *(intptr_t*)(value)) #define SET_STACK_ADDR(value, offset) (*((address *)&topOfStack[-(offset)]) = (value)) #define SET_STACK_INT(value, offset) (*((jint *)&topOfStack[-(offset)]) = (value)) #define SET_STACK_FLOAT(value, offset) (*((jfloat *)&topOfStack[-(offset)]) = (value)) #define SET_STACK_OBJECT(value, offset) (*((oop *)&topOfStack[-(offset)]) = (value)) #define SET_STACK_DOUBLE(value, offset) (((VMJavaVal64*)&topOfStack[-(offset)])->d = (value)) #define SET_STACK_DOUBLE_FROM_ADDR(addr, offset) (((VMJavaVal64*)&topOfStack[-(offset)])->d = \ ((VMJavaVal64*)(addr))->d) #define SET_STACK_LONG(value, offset) (((VMJavaVal64*)&topOfStack[-(offset)])->l = (value)) #define SET_STACK_LONG_FROM_ADDR(addr, offset) (((VMJavaVal64*)&topOfStack[-(offset)])->l = \ ((VMJavaVal64*)(addr))->l) // JavaLocals implementation #define LOCALS_SLOT(offset) ((intptr_t*)&locals[-(offset)]) #define LOCALS_ADDR(offset) ((address)locals[-(offset)]) #define LOCALS_INT(offset) (*((jint*)&locals[-(offset)])) #define LOCALS_FLOAT(offset) (*((jfloat*)&locals[-(offset)])) #define LOCALS_OBJECT(offset) ((oop)locals[-(offset)]) #define LOCALS_DOUBLE(offset) (((VMJavaVal64*)&locals[-((offset) + 1)])->d) #define LOCALS_LONG(offset) (((VMJavaVal64*)&locals[-((offset) + 1)])->l) #define LOCALS_LONG_AT(offset) (((address)&locals[-((offset) + 1)])) #define LOCALS_DOUBLE_AT(offset) (((address)&locals[-((offset) + 1)])) #define SET_LOCALS_SLOT(value, offset) (*(intptr_t*)&locals[-(offset)] = *(intptr_t *)(value)) #define SET_LOCALS_ADDR(value, offset) (*((address *)&locals[-(offset)]) = (value)) #define SET_LOCALS_INT(value, offset) (*((jint *)&locals[-(offset)]) = (value)) #define SET_LOCALS_FLOAT(value, offset) (*((jfloat *)&locals[-(offset)]) = (value)) #define SET_LOCALS_OBJECT(value, offset) (*((oop *)&locals[-(offset)]) = (value)) #define SET_LOCALS_DOUBLE(value, offset) (((VMJavaVal64*)&locals[-((offset)+1)])->d = (value)) #define SET_LOCALS_LONG(value, offset) (((VMJavaVal64*)&locals[-((offset)+1)])->l = (value)) #define SET_LOCALS_DOUBLE_FROM_ADDR(addr, offset) (((VMJavaVal64*)&locals[-((offset)+1)])->d = \ ((VMJavaVal64*)(addr))->d) #define SET_LOCALS_LONG_FROM_ADDR(addr, offset) (((VMJavaVal64*)&locals[-((offset)+1)])->l = \ ((VMJavaVal64*)(addr))->l) #endif // CPU_ZERO_VM_BYTECODEINTERPRETER_ZERO_HPP