Mercurial > hg > truffle
annotate src/share/vm/compiler/compilerOracle.hpp @ 9126:bc26f978b0ce
HotSpotResolvedObjectType: implement hasFinalizeSubclass() correctly
don't use the (wrong) cached value, but ask the runtime on each request.
Fixes regression on xml.* benchmarks @ specjvm2008. The problem was:
After the constructor of Object was deoptimized due to an assumption violation,
it was recompiled again after some time. However, on recompilation, the value
of hasFinalizeSubclass for the class was not updated and it was compiled again
with a, now wrong, assumption, which then triggers deoptimization again.
This was repeated until it hit the recompilation limit (defined by
PerMethodRecompilationCutoff), and therefore only executed by the interpreter
from now on, causing the performance regression.
author | Bernhard Urban <bernhard.urban@jku.at> |
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date | Mon, 15 Apr 2013 19:54:58 +0200 |
parents | 1e76463170b3 |
children | 14b356bbca27 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1998, 2012, Oracle and/or its affiliates. All rights reserved. |
0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
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 | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #ifndef SHARE_VM_COMPILER_COMPILERORACLE_HPP |
26 #define SHARE_VM_COMPILER_COMPILERORACLE_HPP | |
27 | |
28 #include "memory/allocation.hpp" | |
29 #include "oops/oopsHierarchy.hpp" | |
30 | |
0 | 31 // CompilerOracle is an interface for turning on and off compilation |
32 // for some methods | |
33 | |
34 class CompilerOracle : AllStatic { | |
35 private: | |
36 static bool _quiet; | |
37 | |
38 public: | |
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39 |
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40 // True if the command file has been specified or is implicit |
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41 static bool has_command_file(); |
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42 |
0 | 43 // Reads from file and adds to lists |
44 static void parse_from_file(); | |
45 | |
46 // Tells whether we to exclude compilation of method | |
47 static bool should_exclude(methodHandle method, bool& quietly); | |
48 | |
49 // Tells whether we want to inline this method | |
50 static bool should_inline(methodHandle method); | |
51 | |
52 // Tells whether we want to disallow inlining of this method | |
53 static bool should_not_inline(methodHandle method); | |
54 | |
55 // Tells whether we should print the assembly for this method | |
56 static bool should_print(methodHandle method); | |
57 | |
58 // Tells whether we should log the compilation data for this method | |
59 static bool should_log(methodHandle method); | |
60 | |
61 // Tells whether to break when compiling method | |
62 static bool should_break_at(methodHandle method); | |
63 | |
64 // Check to see if this method has option set for it | |
65 static bool has_option_string(methodHandle method, const char * option); | |
66 | |
67 // Reads from string instead of file | |
68 static void parse_from_string(const char* command_string, void (*parser)(char*)); | |
69 | |
70 static void parse_from_line(char* line); | |
71 static void parse_compile_only(char * line); | |
72 | |
73 // For updating the oracle file | |
74 static void append_comment_to_file(const char* message); | |
75 static void append_exclude_to_file(methodHandle method); | |
76 }; | |
1972 | 77 |
78 #endif // SHARE_VM_COMPILER_COMPILERORACLE_HPP |