Mercurial > hg > graal-jvmci-8
view src/share/vm/opto/idealGraphPrinter.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 | 1927db75dd85 |
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/* * Copyright (c) 2007, 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 SHARE_VM_OPTO_IDEALGRAPHPRINTER_HPP #define SHARE_VM_OPTO_IDEALGRAPHPRINTER_HPP #include "libadt/dict.hpp" #include "libadt/vectset.hpp" #include "utilities/growableArray.hpp" #include "utilities/ostream.hpp" #include "utilities/xmlstream.hpp" #ifndef PRODUCT class Compile; class PhaseIFG; class PhaseChaitin; class Matcher; class Node; class InlineTree; class ciMethod; class IdealGraphPrinter { private: enum State { Invalid, Valid, New }; private: static const char *INDENT; static const char *TOP_ELEMENT; static const char *GROUP_ELEMENT; static const char *GRAPH_ELEMENT; static const char *PROPERTIES_ELEMENT; static const char *EDGES_ELEMENT; static const char *PROPERTY_ELEMENT; static const char *EDGE_ELEMENT; static const char *NODE_ELEMENT; static const char *NODES_ELEMENT; static const char *CONTROL_FLOW_ELEMENT; static const char *REMOVE_EDGE_ELEMENT; static const char *REMOVE_NODE_ELEMENT; static const char *METHOD_NAME_PROPERTY; static const char *BLOCK_NAME_PROPERTY; static const char *BLOCK_DOMINATOR_PROPERTY; static const char *BLOCK_ELEMENT; static const char *SUCCESSORS_ELEMENT; static const char *SUCCESSOR_ELEMENT; static const char *METHOD_IS_PUBLIC_PROPERTY; static const char *METHOD_IS_STATIC_PROPERTY; static const char *TRUE_VALUE; static const char *NODE_NAME_PROPERTY; static const char *EDGE_NAME_PROPERTY; static const char *NODE_ID_PROPERTY; static const char *FROM_PROPERTY; static const char *TO_PROPERTY; static const char *PROPERTY_NAME_PROPERTY; static const char *GRAPH_NAME_PROPERTY; static const char *INDEX_PROPERTY; static const char *METHOD_ELEMENT; static const char *INLINE_ELEMENT; static const char *BYTECODES_ELEMENT; static const char *METHOD_BCI_PROPERTY; static const char *METHOD_SHORT_NAME_PROPERTY; static const char *ASSEMBLY_ELEMENT; elapsedTimer _walk_time; elapsedTimer _output_time; elapsedTimer _build_blocks_time; static int _file_count; networkStream *_stream; xmlStream *_xml; outputStream *_output; ciMethod *_current_method; int _depth; char buffer[128]; bool _should_send_method; PhaseChaitin* _chaitin; bool _traverse_outs; Compile *C; static void pre_node(Node* node, void *env); static void post_node(Node* node, void *env); void print_indent(); void print_method(ciMethod *method, int bci, InlineTree *tree); void print_inline_tree(InlineTree *tree); void visit_node(Node *n, void *param); void walk_nodes(Node *start, void *param); void begin_elem(const char *s); void end_elem(); void begin_head(const char *s); void end_head(); void print_attr(const char *name, const char *val); void print_attr(const char *name, intptr_t val); void print_prop(const char *name, const char *val); void print_prop(const char *name, int val); void tail(const char *name); void head(const char *name); void text(const char *s); intptr_t get_node_id(Node *n); IdealGraphPrinter(); ~IdealGraphPrinter(); public: static void clean_up(); static IdealGraphPrinter *printer(); bool traverse_outs(); void set_traverse_outs(bool b); outputStream *output(); void print_inlining(Compile* compile); void begin_method(Compile* compile); void end_method(); void print_method(Compile* compile, const char *name, int level=1, bool clear_nodes = false); void print(Compile* compile, const char *name, Node *root, int level=1, bool clear_nodes = false); void print_xml(const char *name); }; #endif #endif // SHARE_VM_OPTO_IDEALGRAPHPRINTER_HPP