1 /*
2 * Copyright (c) 2000, 2021, Oracle and/or its affiliates. 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.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "compiler/compilerDefinitions.hpp"
27 #include "gc/shared/gcConfig.hpp"
28 #include "jvm.h"
29 #include "jvmci/jvmci_globals.hpp"
30 #include "logging/log.hpp"
31 #include "runtime/arguments.hpp"
32 #include "runtime/flags/jvmFlagAccess.hpp"
33 #include "runtime/globals_extension.hpp"
34 #include "utilities/defaultStream.hpp"
35 #include "utilities/ostream.hpp"
36
37 fileStream* JVMCIGlobals::_jni_config_file = NULL;
38
39 // Return true if jvmci flags are consistent.
40 bool JVMCIGlobals::check_jvmci_flags_are_consistent() {
41
42 #ifndef PRODUCT
43 #define APPLY_JVMCI_FLAGS(params3, params4) \
44 JVMCI_FLAGS(params4, params3, params4, params3, params4, IGNORE_RANGE, IGNORE_CONSTRAINT)
45 #define JVMCI_DECLARE_CHECK4(type, name, value, ...) bool name##checked = false;
46 #define JVMCI_DECLARE_CHECK3(type, name, ...) bool name##checked = false;
47 #define JVMCI_FLAG_CHECKED(name) name##checked = true;
48 APPLY_JVMCI_FLAGS(JVMCI_DECLARE_CHECK3, JVMCI_DECLARE_CHECK4)
49 #else
50 #define JVMCI_FLAG_CHECKED(name)
51 #endif
52
53 // Checks that a given flag is not set if a given guard flag is false.
54 #define CHECK_NOT_SET(FLAG, GUARD) \
55 JVMCI_FLAG_CHECKED(FLAG) \
56 if (!GUARD && !FLAG_IS_DEFAULT(FLAG)) { \
57 jio_fprintf(defaultStream::error_stream(), \
58 "Improperly specified VM option '%s': '%s' must be enabled\n", #FLAG, #GUARD); \
59 return false; \
60 }
61
62 if (EnableJVMCIProduct) {
63 if (FLAG_IS_DEFAULT(EnableJVMCI)) {
64 FLAG_SET_DEFAULT(EnableJVMCI, true);
65 }
66 if (EnableJVMCI && FLAG_IS_DEFAULT(UseJVMCICompiler)) {
67 FLAG_SET_DEFAULT(UseJVMCICompiler, true);
68 }
69 }
70
71 JVMCI_FLAG_CHECKED(UseJVMCICompiler)
72 JVMCI_FLAG_CHECKED(EnableJVMCI)
73 JVMCI_FLAG_CHECKED(EnableJVMCIProduct)
74
75 CHECK_NOT_SET(BootstrapJVMCI, UseJVMCICompiler)
76 CHECK_NOT_SET(PrintBootstrap, UseJVMCICompiler)
77 CHECK_NOT_SET(JVMCIThreads, UseJVMCICompiler)
78 CHECK_NOT_SET(JVMCIHostThreads, UseJVMCICompiler)
79
80 if (UseJVMCICompiler) {
81 if (FLAG_IS_DEFAULT(UseJVMCINativeLibrary) && !UseJVMCINativeLibrary) {
82 char path[JVM_MAXPATHLEN];
83 if (os::dll_locate_lib(path, sizeof(path), Arguments::get_dll_dir(), JVMCI_SHARED_LIBRARY_NAME)) {
84 // If a JVMCI native library is present,
85 // we enable UseJVMCINativeLibrary by default.
86 FLAG_SET_DEFAULT(UseJVMCINativeLibrary, true);
87 }
88 }
89 if (!FLAG_IS_DEFAULT(EnableJVMCI) && !EnableJVMCI) {
90 jio_fprintf(defaultStream::error_stream(),
91 "Improperly specified VM option UseJVMCICompiler: EnableJVMCI cannot be disabled\n");
92 return false;
93 }
94 FLAG_SET_DEFAULT(EnableJVMCI, true);
95 if (BootstrapJVMCI && UseJVMCINativeLibrary) {
96 jio_fprintf(defaultStream::error_stream(), "-XX:+BootstrapJVMCI is not compatible with -XX:+UseJVMCINativeLibrary\n");
97 return false;
98 }
99 if (BootstrapJVMCI && (TieredStopAtLevel < CompLevel_full_optimization)) {
100 jio_fprintf(defaultStream::error_stream(),
101 "-XX:+BootstrapJVMCI is not compatible with -XX:TieredStopAtLevel=%d\n", TieredStopAtLevel);
102 return false;
103 }
104 }
105
106 if (!EnableJVMCI) {
107 // Switch off eager JVMCI initialization if JVMCI is disabled.
108 // Don't throw error if EagerJVMCI is set to allow testing.
109 if (EagerJVMCI) {
110 FLAG_SET_DEFAULT(EagerJVMCI, false);
111 }
112 }
113 JVMCI_FLAG_CHECKED(EagerJVMCI)
114
115 CHECK_NOT_SET(JVMCIEventLogLevel, EnableJVMCI)
116 CHECK_NOT_SET(JVMCITraceLevel, EnableJVMCI)
117 CHECK_NOT_SET(JVMCICounterSize, EnableJVMCI)
118 CHECK_NOT_SET(JVMCICountersExcludeCompiler, EnableJVMCI)
119 CHECK_NOT_SET(JVMCIUseFastLocking, EnableJVMCI)
120 CHECK_NOT_SET(JVMCINMethodSizeLimit, EnableJVMCI)
121 CHECK_NOT_SET(JVMCIPrintProperties, EnableJVMCI)
122 CHECK_NOT_SET(UseJVMCINativeLibrary, EnableJVMCI)
123 CHECK_NOT_SET(JVMCILibPath, EnableJVMCI)
124 CHECK_NOT_SET(JVMCILibDumpJNIConfig, EnableJVMCI)
125
126 #ifndef COMPILER2
127 JVMCI_FLAG_CHECKED(MaxVectorSize)
128 JVMCI_FLAG_CHECKED(ReduceInitialCardMarks)
129 JVMCI_FLAG_CHECKED(UseMultiplyToLenIntrinsic)
130 JVMCI_FLAG_CHECKED(UseSquareToLenIntrinsic)
131 JVMCI_FLAG_CHECKED(UseMulAddIntrinsic)
132 JVMCI_FLAG_CHECKED(UseMontgomeryMultiplyIntrinsic)
133 JVMCI_FLAG_CHECKED(UseMontgomerySquareIntrinsic)
134 #endif // !COMPILER2
135
136 #ifndef PRODUCT
137 #define JVMCI_CHECK4(type, name, value, ...) assert(name##checked, #name " flag not checked");
138 #define JVMCI_CHECK3(type, name, ...) assert(name##checked, #name " flag not checked");
139 // Ensures that all JVMCI flags are checked by this method.
140 APPLY_JVMCI_FLAGS(JVMCI_CHECK3, JVMCI_CHECK4)
141 #undef APPLY_JVMCI_FLAGS
142 #undef JVMCI_DECLARE_CHECK3
143 #undef JVMCI_DECLARE_CHECK4
144 #undef JVMCI_CHECK3
145 #undef JVMCI_CHECK4
146 #undef JVMCI_FLAG_CHECKED
147 #endif // PRODUCT
148 #undef CHECK_NOT_SET
149
150 if (JVMCILibDumpJNIConfig != NULL) {
151 _jni_config_file = new(ResourceObj::C_HEAP, mtJVMCI) fileStream(JVMCILibDumpJNIConfig);
152 if (_jni_config_file == NULL || !_jni_config_file->is_open()) {
153 jio_fprintf(defaultStream::error_stream(),
154 "Could not open file for dumping JVMCI shared library JNI config: %s\n", JVMCILibDumpJNIConfig);
155 return false;
156 }
157 }
158
159 return true;
160 }
161
162 // Convert JVMCI flags from experimental to product
163 bool JVMCIGlobals::enable_jvmci_product_mode(JVMFlagOrigin origin) {
164 const char *JVMCIFlags[] = {
165 "EnableJVMCI",
166 "EnableJVMCIProduct",
167 "UseJVMCICompiler",
168 "JVMCIPrintProperties",
169 "EagerJVMCI",
170 "JVMCIThreads",
171 "JVMCICounterSize",
172 "JVMCICountersExcludeCompiler",
173 "JVMCINMethodSizeLimit",
174 "JVMCIEventLogLevel",
175 "JVMCITraceLevel",
176 "JVMCILibPath",
177 "JVMCILibDumpJNIConfig",
178 "UseJVMCINativeLibrary",
179 NULL
180 };
181
182 for (int i = 0; JVMCIFlags[i] != NULL; i++) {
183 JVMFlag *jvmciFlag = (JVMFlag *)JVMFlag::find_declared_flag(JVMCIFlags[i]);
184 if (jvmciFlag == NULL) {
185 return false;
186 }
187 jvmciFlag->clear_experimental();
188 jvmciFlag->set_product();
189 }
190
191 bool value = true;
192 JVMFlag *jvmciEnableFlag = JVMFlag::find_flag("EnableJVMCIProduct");
193 if (JVMFlagAccess::set_bool(jvmciEnableFlag, &value, origin) != JVMFlag::SUCCESS) {
194 return false;
195 }
196
197 // Effect of EnableJVMCIProduct on changing defaults of EnableJVMCI
198 // and UseJVMCICompiler is deferred to check_jvmci_flags_are_consistent
199 // so that setting these flags explicitly (e.g. on the command line)
200 // takes precedence.
201
202 return true;
203 }
204
205 bool JVMCIGlobals::gc_supports_jvmci() {
206 return UseSerialGC || UseParallelGC || UseG1GC;
207 }
208
209 void JVMCIGlobals::check_jvmci_supported_gc() {
210 if (EnableJVMCI) {
211 // Check if selected GC is supported by JVMCI and Java compiler
212 if (!gc_supports_jvmci()) {
213 log_warning(gc, jvmci)("Setting EnableJVMCI to false as selected GC does not support JVMCI: %s", GCConfig::hs_err_name());
214 FLAG_SET_DEFAULT(EnableJVMCI, false);
215 FLAG_SET_DEFAULT(UseJVMCICompiler, false);
216 }
217 }
218 }