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comparison src/cpu/x86/vm/cppInterpreterGenerator_x86.hpp @ 3249:e1162778c1c8

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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
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3248:e6beb62de02d 3249:e1162778c1c8
1 /* 1 /*
2 * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved. 2 * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 * 4 *
5 * This code is free software; you can redistribute it and/or modify it 5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as 6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. 7 * published by the Free Software Foundation.
32 address generate_native_entry(bool synchronized); 32 address generate_native_entry(bool synchronized);
33 address generate_abstract_entry(void); 33 address generate_abstract_entry(void);
34 address generate_math_entry(AbstractInterpreter::MethodKind kind); 34 address generate_math_entry(AbstractInterpreter::MethodKind kind);
35 address generate_empty_entry(void); 35 address generate_empty_entry(void);
36 address generate_accessor_entry(void); 36 address generate_accessor_entry(void);
37 address generate_Reference_get_entry(void);
37 void lock_method(void); 38 void lock_method(void);
38 void generate_stack_overflow_check(void); 39 void generate_stack_overflow_check(void);
39 40
40 void generate_counter_incr(Label* overflow, Label* profile_method, Label* profile_method_continue); 41 void generate_counter_incr(Label* overflow, Label* profile_method, Label* profile_method_continue);
41 void generate_counter_overflow(Label* do_continue); 42 void generate_counter_overflow(Label* do_continue);