Thu, 07 Sep 2017 09:17:43 -0400
8072428: Enable UseLoopCounter ergonomically if on-stack-replacement is enabled
Summary: Set UseLoopCounter ergonomically if on-stack-replacement is enabled. Print warning.
Reviewed-by: kvn
1 /*
2 * Copyright (c) 1998, 2016, 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 */
25 #include "precompiled.hpp"
26 #include "memory/universe.hpp"
27 #include "oops/oop.inline.hpp"
28 #include "runtime/arguments.hpp"
29 #ifdef TARGET_ARCH_x86
30 # include "vm_version_x86.hpp"
31 #endif
32 #ifdef TARGET_ARCH_sparc
33 # include "vm_version_sparc.hpp"
34 #endif
35 #ifdef TARGET_ARCH_zero
36 # include "vm_version_zero.hpp"
37 #endif
38 #ifdef TARGET_ARCH_arm
39 # include "vm_version_arm.hpp"
40 #endif
41 #ifdef TARGET_ARCH_ppc
42 # include "vm_version_ppc.hpp"
43 #endif
45 const char* Abstract_VM_Version::_s_vm_release = Abstract_VM_Version::vm_release();
46 const char* Abstract_VM_Version::_s_internal_vm_info_string = Abstract_VM_Version::internal_vm_info_string();
47 bool Abstract_VM_Version::_supports_cx8 = false;
48 bool Abstract_VM_Version::_supports_atomic_getset4 = false;
49 bool Abstract_VM_Version::_supports_atomic_getset8 = false;
50 bool Abstract_VM_Version::_supports_atomic_getadd4 = false;
51 bool Abstract_VM_Version::_supports_atomic_getadd8 = false;
52 unsigned int Abstract_VM_Version::_logical_processors_per_package = 1U;
53 unsigned int Abstract_VM_Version::_L1_data_cache_line_size = 0;
54 int Abstract_VM_Version::_reserve_for_allocation_prefetch = 0;
56 #ifndef HOTSPOT_RELEASE_VERSION
57 #error HOTSPOT_RELEASE_VERSION must be defined
58 #endif
59 #ifndef JRE_RELEASE_VERSION
60 #error JRE_RELEASE_VERSION must be defined
61 #endif
62 #ifndef HOTSPOT_BUILD_TARGET
63 #error HOTSPOT_BUILD_TARGET must be defined
64 #endif
66 #ifdef PRODUCT
67 #define VM_RELEASE HOTSPOT_RELEASE_VERSION
68 #else
69 #define VM_RELEASE HOTSPOT_RELEASE_VERSION "-" HOTSPOT_BUILD_TARGET
70 #endif
72 // HOTSPOT_RELEASE_VERSION must follow the release version naming convention
73 // <major_ver>.<minor_ver>-b<nn>[-<identifier>][-<debug_target>]
74 int Abstract_VM_Version::_vm_major_version = 0;
75 int Abstract_VM_Version::_vm_minor_version = 0;
76 int Abstract_VM_Version::_vm_build_number = 0;
77 bool Abstract_VM_Version::_initialized = false;
78 int Abstract_VM_Version::_parallel_worker_threads = 0;
79 bool Abstract_VM_Version::_parallel_worker_threads_initialized = false;
81 void Abstract_VM_Version::initialize() {
82 if (_initialized) {
83 return;
84 }
85 char* vm_version = os::strdup(HOTSPOT_RELEASE_VERSION);
87 // Expecting the next vm_version format:
88 // <major_ver>.<minor_ver>-b<nn>[-<identifier>]
89 char* vm_major_ver = vm_version;
90 assert(isdigit(vm_major_ver[0]),"wrong vm major version number");
91 char* vm_minor_ver = strchr(vm_major_ver, '.');
92 assert(vm_minor_ver != NULL && isdigit(vm_minor_ver[1]),"wrong vm minor version number");
93 vm_minor_ver[0] = '\0'; // terminate vm_major_ver
94 vm_minor_ver += 1;
95 char* vm_build_num = strchr(vm_minor_ver, '-');
96 assert(vm_build_num != NULL && vm_build_num[1] == 'b' && isdigit(vm_build_num[2]),"wrong vm build number");
97 vm_build_num[0] = '\0'; // terminate vm_minor_ver
98 vm_build_num += 2;
100 _vm_major_version = atoi(vm_major_ver);
101 _vm_minor_version = atoi(vm_minor_ver);
102 _vm_build_number = atoi(vm_build_num);
104 os::free(vm_version);
105 _initialized = true;
106 }
108 #if defined(_LP64)
109 #define VMLP "64-Bit "
110 #else
111 #define VMLP ""
112 #endif
114 #ifndef VMTYPE
115 #ifdef TIERED
116 #define VMTYPE "Server"
117 #else // TIERED
118 #ifdef ZERO
119 #ifdef SHARK
120 #define VMTYPE "Shark"
121 #else // SHARK
122 #define VMTYPE "Zero"
123 #endif // SHARK
124 #else // ZERO
125 #define VMTYPE COMPILER1_PRESENT("Client") \
126 COMPILER2_PRESENT("Server")
127 #endif // ZERO
128 #endif // TIERED
129 #endif
131 #ifndef HOTSPOT_VM_DISTRO
132 #error HOTSPOT_VM_DISTRO must be defined
133 #endif
134 #define VMNAME HOTSPOT_VM_DISTRO " " VMLP EMBEDDED_ONLY("Embedded ") VMTYPE " VM"
136 const char* Abstract_VM_Version::vm_name() {
137 return VMNAME;
138 }
141 const char* Abstract_VM_Version::vm_vendor() {
142 #ifdef VENDOR
143 return XSTR(VENDOR);
144 #else
145 return JDK_Version::is_gte_jdk17x_version() ?
146 "Oracle Corporation" : "Sun Microsystems Inc.";
147 #endif
148 }
151 const char* Abstract_VM_Version::vm_info_string() {
152 switch (Arguments::mode()) {
153 case Arguments::_int:
154 return UseSharedSpaces ? "interpreted mode, sharing" : "interpreted mode";
155 case Arguments::_mixed:
156 return UseSharedSpaces ? "mixed mode, sharing" : "mixed mode";
157 case Arguments::_comp:
158 return UseSharedSpaces ? "compiled mode, sharing" : "compiled mode";
159 };
160 ShouldNotReachHere();
161 return "";
162 }
164 // NOTE: do *not* use stringStream. this function is called by
165 // fatal error handler. if the crash is in native thread,
166 // stringStream cannot get resource allocated and will SEGV.
167 const char* Abstract_VM_Version::vm_release() {
168 return VM_RELEASE;
169 }
171 // NOTE: do *not* use stringStream. this function is called by
172 // fatal error handlers. if the crash is in native thread,
173 // stringStream cannot get resource allocated and will SEGV.
174 const char* Abstract_VM_Version::jre_release_version() {
175 return JRE_RELEASE_VERSION;
176 }
178 #define OS LINUX_ONLY("linux") \
179 WINDOWS_ONLY("windows") \
180 SOLARIS_ONLY("solaris") \
181 AIX_ONLY("aix") \
182 BSD_ONLY("bsd")
184 #ifndef CPU
185 #ifdef ZERO
186 #define CPU ZERO_LIBARCH
187 #else
188 #define CPU IA32_ONLY("x86") \
189 IA64_ONLY("ia64") \
190 AMD64_ONLY("amd64") \
191 PPC64_ONLY("ppc64") \
192 SPARC_ONLY("sparc")
193 #endif // ZERO
194 #endif
196 const char *Abstract_VM_Version::vm_platform_string() {
197 return OS "-" CPU;
198 }
200 const char* Abstract_VM_Version::internal_vm_info_string() {
201 #ifndef HOTSPOT_BUILD_USER
202 #define HOTSPOT_BUILD_USER unknown
203 #endif
205 #ifndef HOTSPOT_BUILD_COMPILER
206 #ifdef _MSC_VER
207 #if _MSC_VER == 1100
208 #define HOTSPOT_BUILD_COMPILER "MS VC++ 5.0"
209 #elif _MSC_VER == 1200
210 #define HOTSPOT_BUILD_COMPILER "MS VC++ 6.0"
211 #elif _MSC_VER == 1310
212 #define HOTSPOT_BUILD_COMPILER "MS VC++ 7.1 (VS2003)"
213 #elif _MSC_VER == 1400
214 #define HOTSPOT_BUILD_COMPILER "MS VC++ 8.0 (VS2005)"
215 #elif _MSC_VER == 1500
216 #define HOTSPOT_BUILD_COMPILER "MS VC++ 9.0 (VS2008)"
217 #elif _MSC_VER == 1600
218 #define HOTSPOT_BUILD_COMPILER "MS VC++ 10.0 (VS2010)"
219 #elif _MSC_VER == 1700
220 #define HOTSPOT_BUILD_COMPILER "MS VC++ 11.0 (VS2012)"
221 #else
222 #define HOTSPOT_BUILD_COMPILER "unknown MS VC++:" XSTR(_MSC_VER)
223 #endif
224 #elif defined(__SUNPRO_CC)
225 #if __SUNPRO_CC == 0x420
226 #define HOTSPOT_BUILD_COMPILER "Workshop 4.2"
227 #elif __SUNPRO_CC == 0x500
228 #define HOTSPOT_BUILD_COMPILER "Workshop 5.0 compat=" XSTR(__SUNPRO_CC_COMPAT)
229 #elif __SUNPRO_CC == 0x520
230 #define HOTSPOT_BUILD_COMPILER "Workshop 5.2 compat=" XSTR(__SUNPRO_CC_COMPAT)
231 #elif __SUNPRO_CC == 0x580
232 #define HOTSPOT_BUILD_COMPILER "Workshop 5.8"
233 #elif __SUNPRO_CC == 0x590
234 #define HOTSPOT_BUILD_COMPILER "Workshop 5.9"
235 #elif __SUNPRO_CC == 0x5100
236 #define HOTSPOT_BUILD_COMPILER "Sun Studio 12u1"
237 #elif __SUNPRO_CC == 0x5120
238 #define HOTSPOT_BUILD_COMPILER "Sun Studio 12u3"
239 #else
240 #define HOTSPOT_BUILD_COMPILER "unknown Workshop:" XSTR(__SUNPRO_CC)
241 #endif
242 #elif defined(__GNUC__)
243 #define HOTSPOT_BUILD_COMPILER "gcc " __VERSION__
244 #elif defined(__IBMCPP__)
245 #define HOTSPOT_BUILD_COMPILER "xlC " XSTR(__IBMCPP__)
247 #else
248 #define HOTSPOT_BUILD_COMPILER "unknown compiler"
249 #endif
250 #endif
252 #ifndef FLOAT_ARCH
253 #if defined(__SOFTFP__)
254 #define FLOAT_ARCH_STR "-sflt"
255 #else
256 #define FLOAT_ARCH_STR ""
257 #endif
258 #else
259 #define FLOAT_ARCH_STR XSTR(FLOAT_ARCH)
260 #endif
262 return VMNAME " (" VM_RELEASE ") for " OS "-" CPU FLOAT_ARCH_STR
263 " JRE (" JRE_RELEASE_VERSION "), built on " __DATE__ " " __TIME__
264 " by " XSTR(HOTSPOT_BUILD_USER) " with " HOTSPOT_BUILD_COMPILER;
265 }
267 const char *Abstract_VM_Version::vm_build_user() {
268 return HOTSPOT_BUILD_USER;
269 }
271 unsigned int Abstract_VM_Version::jvm_version() {
272 return ((Abstract_VM_Version::vm_major_version() & 0xFF) << 24) |
273 ((Abstract_VM_Version::vm_minor_version() & 0xFF) << 16) |
274 (Abstract_VM_Version::vm_build_number() & 0xFF);
275 }
278 void VM_Version_init() {
279 VM_Version::initialize();
281 #ifndef PRODUCT
282 if (PrintMiscellaneous && Verbose) {
283 os::print_cpu_info(tty);
284 }
285 #endif
286 }
288 unsigned int Abstract_VM_Version::nof_parallel_worker_threads(
289 unsigned int num,
290 unsigned int den,
291 unsigned int switch_pt) {
292 if (FLAG_IS_DEFAULT(ParallelGCThreads)) {
293 assert(ParallelGCThreads == 0, "Default ParallelGCThreads is not 0");
294 // For very large machines, there are diminishing returns
295 // for large numbers of worker threads. Instead of
296 // hogging the whole system, use a fraction of the workers for every
297 // processor after the first 8. For example, on a 72 cpu machine
298 // and a chosen fraction of 5/8
299 // use 8 + (72 - 8) * (5/8) == 48 worker threads.
300 unsigned int ncpus = (unsigned int) os::initial_active_processor_count();
301 return (ncpus <= switch_pt) ?
302 ncpus :
303 (switch_pt + ((ncpus - switch_pt) * num) / den);
304 } else {
305 return ParallelGCThreads;
306 }
307 }
309 unsigned int Abstract_VM_Version::calc_parallel_worker_threads() {
310 return nof_parallel_worker_threads(5, 8, 8);
311 }
314 // Does not set the _initialized flag since it is
315 // a global flag.
316 unsigned int Abstract_VM_Version::parallel_worker_threads() {
317 if (!_parallel_worker_threads_initialized) {
318 if (FLAG_IS_DEFAULT(ParallelGCThreads)) {
319 _parallel_worker_threads = VM_Version::calc_parallel_worker_threads();
320 } else {
321 _parallel_worker_threads = ParallelGCThreads;
322 }
323 _parallel_worker_threads_initialized = true;
324 }
325 return _parallel_worker_threads;
326 }