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 if (UseCompactObjectHeaders) {
105 log_warning(jvmci)("-XX:+UseCompactObjectHeaders not supported by JVMCI, disabling UseCompactObjectHeaders");
106 FLAG_SET_DEFAULT(UseCompactObjectHeaders, false);
107 }
108 }
109
110 if (!EnableJVMCI) {
111 // Switch off eager JVMCI initialization if JVMCI is disabled.
112 // Don't throw error if EagerJVMCI is set to allow testing.
113 if (EagerJVMCI) {
114 FLAG_SET_DEFAULT(EagerJVMCI, false);
115 }
116 }
117 JVMCI_FLAG_CHECKED(EagerJVMCI)
118
119 CHECK_NOT_SET(JVMCIEventLogLevel, EnableJVMCI)
120 CHECK_NOT_SET(JVMCITraceLevel, EnableJVMCI)
121 CHECK_NOT_SET(JVMCICounterSize, EnableJVMCI)
122 CHECK_NOT_SET(JVMCICountersExcludeCompiler, EnableJVMCI)
123 CHECK_NOT_SET(JVMCIUseFastLocking, EnableJVMCI)
124 CHECK_NOT_SET(JVMCINMethodSizeLimit, EnableJVMCI)
125 CHECK_NOT_SET(JVMCIPrintProperties, EnableJVMCI)
126 CHECK_NOT_SET(UseJVMCINativeLibrary, EnableJVMCI)
127 CHECK_NOT_SET(JVMCILibPath, EnableJVMCI)
128 CHECK_NOT_SET(JVMCILibDumpJNIConfig, EnableJVMCI)
129
130 #ifndef COMPILER2
131 JVMCI_FLAG_CHECKED(MaxVectorSize)
132 JVMCI_FLAG_CHECKED(ReduceInitialCardMarks)
133 JVMCI_FLAG_CHECKED(UseMultiplyToLenIntrinsic)
134 JVMCI_FLAG_CHECKED(UseSquareToLenIntrinsic)
135 JVMCI_FLAG_CHECKED(UseMulAddIntrinsic)
136 JVMCI_FLAG_CHECKED(UseMontgomeryMultiplyIntrinsic)
137 JVMCI_FLAG_CHECKED(UseMontgomerySquareIntrinsic)
138 #endif // !COMPILER2
139
140 #ifndef PRODUCT
141 #define JVMCI_CHECK4(type, name, value, ...) assert(name##checked, #name " flag not checked");
142 #define JVMCI_CHECK3(type, name, ...) assert(name##checked, #name " flag not checked");
143 // Ensures that all JVMCI flags are checked by this method.
144 APPLY_JVMCI_FLAGS(JVMCI_CHECK3, JVMCI_CHECK4)
145 #undef APPLY_JVMCI_FLAGS
146 #undef JVMCI_DECLARE_CHECK3
147 #undef JVMCI_DECLARE_CHECK4
148 #undef JVMCI_CHECK3
149 #undef JVMCI_CHECK4
150 #undef JVMCI_FLAG_CHECKED
151 #endif // PRODUCT
152 #undef CHECK_NOT_SET
153
154 if (JVMCILibDumpJNIConfig != NULL) {
155 _jni_config_file = new(ResourceObj::C_HEAP, mtJVMCI) fileStream(JVMCILibDumpJNIConfig);
156 if (_jni_config_file == NULL || !_jni_config_file->is_open()) {
157 jio_fprintf(defaultStream::error_stream(),
158 "Could not open file for dumping JVMCI shared library JNI config: %s\n", JVMCILibDumpJNIConfig);
159 return false;
160 }
161 }
162
163 return true;
164 }
165
166 // Convert JVMCI flags from experimental to product
167 bool JVMCIGlobals::enable_jvmci_product_mode(JVMFlagOrigin origin) {
168 const char *JVMCIFlags[] = {
169 "EnableJVMCI",
170 "EnableJVMCIProduct",
171 "UseJVMCICompiler",
172 "JVMCIPrintProperties",
173 "EagerJVMCI",
174 "JVMCIThreads",
175 "JVMCICounterSize",
176 "JVMCICountersExcludeCompiler",
177 "JVMCINMethodSizeLimit",
178 "JVMCIEventLogLevel",
179 "JVMCITraceLevel",
180 "JVMCILibPath",
181 "JVMCILibDumpJNIConfig",
182 "UseJVMCINativeLibrary",
183 NULL
184 };
185
186 for (int i = 0; JVMCIFlags[i] != NULL; i++) {
187 JVMFlag *jvmciFlag = (JVMFlag *)JVMFlag::find_declared_flag(JVMCIFlags[i]);
188 if (jvmciFlag == NULL) {
189 return false;
190 }
191 jvmciFlag->clear_experimental();
192 jvmciFlag->set_product();
193 }
194
195 bool value = true;
196 JVMFlag *jvmciEnableFlag = JVMFlag::find_flag("EnableJVMCIProduct");
197 if (JVMFlagAccess::set_bool(jvmciEnableFlag, &value, origin) != JVMFlag::SUCCESS) {
198 return false;
199 }
200
201 // Effect of EnableJVMCIProduct on changing defaults of EnableJVMCI
202 // and UseJVMCICompiler is deferred to check_jvmci_flags_are_consistent
203 // so that setting these flags explicitly (e.g. on the command line)
204 // takes precedence.
205
206 return true;
207 }
208
209 bool JVMCIGlobals::gc_supports_jvmci() {
210 return UseSerialGC || UseParallelGC || UseG1GC;
211 }
212
213 void JVMCIGlobals::check_jvmci_supported_gc() {
214 if (EnableJVMCI) {
215 // Check if selected GC is supported by JVMCI and Java compiler
216 if (!gc_supports_jvmci()) {
217 log_warning(gc, jvmci)("Setting EnableJVMCI to false as selected GC does not support JVMCI: %s", GCConfig::hs_err_name());
218 FLAG_SET_DEFAULT(EnableJVMCI, false);
219 FLAG_SET_DEFAULT(UseJVMCICompiler, false);
220 }
221 }
222 }