Wed, 09 Dec 2009 16:40:45 -0800
6895383: JCK test throws NPE for method compiled with Escape Analysis
Summary: Add missing checks for MemBar nodes in EA.
Reviewed-by: never
1 /*
2 * Copyright 1999-2009 Sun Microsystems, Inc. All Rights Reserved.
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.
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19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 * CA 95054 USA or visit www.sun.com if you need additional information or
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23 */
25 #include "incls/_precompiled.incl"
26 #include "incls/_c2compiler.cpp.incl"
29 volatile int C2Compiler::_runtimes = uninitialized;
31 // register information defined by ADLC
32 extern const char register_save_policy[];
33 extern const int register_save_type[];
35 const char* C2Compiler::retry_no_subsuming_loads() {
36 return "retry without subsuming loads";
37 }
38 const char* C2Compiler::retry_no_escape_analysis() {
39 return "retry without escape analysis";
40 }
41 void C2Compiler::initialize_runtime() {
43 // Check assumptions used while running ADLC
44 Compile::adlc_verification();
45 assert(REG_COUNT <= ConcreteRegisterImpl::number_of_registers, "incompatible register counts");
47 for (int i = 0; i < ConcreteRegisterImpl::number_of_registers ; i++ ) {
48 OptoReg::vm2opto[i] = OptoReg::Bad;
49 }
51 for( OptoReg::Name i=OptoReg::Name(0); i<OptoReg::Name(REG_COUNT); i = OptoReg::add(i,1) ) {
52 VMReg r = OptoReg::as_VMReg(i);
53 if (r->is_valid()) {
54 OptoReg::vm2opto[r->value()] = i;
55 }
56 }
58 // Check that runtime and architecture description agree on callee-saved-floats
59 bool callee_saved_floats = false;
60 for( OptoReg::Name i=OptoReg::Name(0); i<OptoReg::Name(_last_Mach_Reg); i = OptoReg::add(i,1) ) {
61 // Is there a callee-saved float or double?
62 if( register_save_policy[i] == 'E' /* callee-saved */ &&
63 (register_save_type[i] == Op_RegF || register_save_type[i] == Op_RegD) ) {
64 callee_saved_floats = true;
65 }
66 }
68 DEBUG_ONLY( Node::init_NodeProperty(); )
70 Compile::pd_compiler2_init();
72 CompilerThread* thread = CompilerThread::current();
74 HandleMark handle_mark(thread);
76 OptoRuntime::generate(thread->env());
78 }
81 void C2Compiler::initialize() {
83 // This method can only be called once per C2Compiler object
84 // The first compiler thread that gets here will initialize the
85 // small amount of global state (and runtime stubs) that c2 needs.
87 // There is a race possible once at startup and then we're fine
89 // Note that this is being called from a compiler thread not the
90 // main startup thread.
92 if (_runtimes != initialized) {
93 initialize_runtimes( initialize_runtime, &_runtimes);
94 }
96 // Mark this compiler object as ready to roll
97 mark_initialized();
98 }
100 void C2Compiler::compile_method(ciEnv* env,
101 ciMethod* target,
102 int entry_bci) {
103 if (!is_initialized()) {
104 initialize();
105 }
106 bool subsume_loads = true;
107 bool do_escape_analysis = DoEscapeAnalysis &&
108 !(env->jvmti_can_hotswap_or_post_breakpoint() ||
109 env->jvmti_can_examine_or_deopt_anywhere());
110 while (!env->failing()) {
111 // Attempt to compile while subsuming loads into machine instructions.
112 Compile C(env, this, target, entry_bci, subsume_loads, do_escape_analysis);
114 // Check result and retry if appropriate.
115 if (C.failure_reason() != NULL) {
116 if (C.failure_reason_is(retry_no_subsuming_loads())) {
117 assert(subsume_loads, "must make progress");
118 subsume_loads = false;
119 continue; // retry
120 }
121 if (C.failure_reason_is(retry_no_escape_analysis())) {
122 assert(do_escape_analysis, "must make progress");
123 do_escape_analysis = false;
124 continue; // retry
125 }
126 // Pass any other failure reason up to the ciEnv.
127 // Note that serious, irreversible failures are already logged
128 // on the ciEnv via env->record_method_not_compilable().
129 env->record_failure(C.failure_reason());
130 }
132 // No retry; just break the loop.
133 break;
134 }
135 }
138 void C2Compiler::print_timers() {
139 // do nothing
140 }