Thu, 25 Sep 2008 12:50:51 -0700
6744783: HotSpot segfaults if given -XX options with an empty string argument
Reviewed-by: kamg, kvn
Contributed-by: volker.simonis@gmail.com
1 /*
2 * Copyright 1998-2008 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.
18 *
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
21 * have any questions.
22 *
23 */
25 # include "incls/_precompiled.incl"
26 # include "incls/_vm_version.cpp.incl"
28 const char* Abstract_VM_Version::_s_vm_release = Abstract_VM_Version::vm_release();
29 const char* Abstract_VM_Version::_s_internal_vm_info_string = Abstract_VM_Version::internal_vm_info_string();
30 bool Abstract_VM_Version::_supports_cx8 = false;
31 unsigned int Abstract_VM_Version::_logical_processors_per_package = 1U;
33 #ifndef HOTSPOT_RELEASE_VERSION
34 #error HOTSPOT_RELEASE_VERSION must be defined
35 #endif
36 #ifndef JRE_RELEASE_VERSION
37 #error JRE_RELEASE_VERSION must be defined
38 #endif
39 #ifndef HOTSPOT_BUILD_TARGET
40 #error HOTSPOT_BUILD_TARGET must be defined
41 #endif
43 #ifdef PRODUCT
44 #define VM_RELEASE HOTSPOT_RELEASE_VERSION
45 #else
46 #define VM_RELEASE HOTSPOT_RELEASE_VERSION "-" HOTSPOT_BUILD_TARGET
47 #endif
49 // HOTSPOT_RELEASE_VERSION must follow the release version naming convention
50 // <major_ver>.<minor_ver>-b<nn>[-<identifier>][-<debug_target>]
51 int Abstract_VM_Version::_vm_major_version = 0;
52 int Abstract_VM_Version::_vm_minor_version = 0;
53 int Abstract_VM_Version::_vm_build_number = 0;
54 bool Abstract_VM_Version::_initialized = false;
55 int Abstract_VM_Version::_parallel_worker_threads = 0;
56 bool Abstract_VM_Version::_parallel_worker_threads_initialized = false;
58 void Abstract_VM_Version::initialize() {
59 if (_initialized) {
60 return;
61 }
62 char* vm_version = os::strdup(HOTSPOT_RELEASE_VERSION);
64 // Expecting the next vm_version format:
65 // <major_ver>.<minor_ver>-b<nn>[-<identifier>]
66 char* vm_major_ver = vm_version;
67 assert(isdigit(vm_major_ver[0]),"wrong vm major version number");
68 char* vm_minor_ver = strchr(vm_major_ver, '.');
69 assert(vm_minor_ver != NULL && isdigit(vm_minor_ver[1]),"wrong vm minor version number");
70 vm_minor_ver[0] = '\0'; // terminate vm_major_ver
71 vm_minor_ver += 1;
72 char* vm_build_num = strchr(vm_minor_ver, '-');
73 assert(vm_build_num != NULL && vm_build_num[1] == 'b' && isdigit(vm_build_num[2]),"wrong vm build number");
74 vm_build_num[0] = '\0'; // terminate vm_minor_ver
75 vm_build_num += 2;
77 _vm_major_version = atoi(vm_major_ver);
78 _vm_minor_version = atoi(vm_minor_ver);
79 _vm_build_number = atoi(vm_build_num);
81 os::free(vm_version);
82 _initialized = true;
83 }
85 #if defined(_LP64)
86 #define VMLP "64-Bit "
87 #else
88 #define VMLP ""
89 #endif
91 #ifdef KERNEL
92 #define VMTYPE "Kernel"
93 #else // KERNEL
94 #ifdef TIERED
95 #define VMTYPE "Server"
96 #else
97 #define VMTYPE COMPILER1_PRESENT("Client") \
98 COMPILER2_PRESENT("Server")
99 #endif // TIERED
100 #endif // KERNEL
102 #ifndef HOTSPOT_VM_DISTRO
103 #error HOTSPOT_VM_DISTRO must be defined
104 #endif
105 #define VMNAME HOTSPOT_VM_DISTRO " " VMLP VMTYPE " VM"
107 const char* Abstract_VM_Version::vm_name() {
108 return VMNAME;
109 }
112 const char* Abstract_VM_Version::vm_vendor() {
113 #ifdef VENDOR
114 return XSTR(VENDOR);
115 #else
116 return "Sun Microsystems Inc.";
117 #endif
118 }
121 const char* Abstract_VM_Version::vm_info_string() {
122 switch (Arguments::mode()) {
123 case Arguments::_int:
124 return UseSharedSpaces ? "interpreted mode, sharing" : "interpreted mode";
125 case Arguments::_mixed:
126 return UseSharedSpaces ? "mixed mode, sharing" : "mixed mode";
127 case Arguments::_comp:
128 return UseSharedSpaces ? "compiled mode, sharing" : "compiled mode";
129 };
130 ShouldNotReachHere();
131 return "";
132 }
134 // NOTE: do *not* use stringStream. this function is called by
135 // fatal error handler. if the crash is in native thread,
136 // stringStream cannot get resource allocated and will SEGV.
137 const char* Abstract_VM_Version::vm_release() {
138 return VM_RELEASE;
139 }
141 #define OS LINUX_ONLY("linux") \
142 WINDOWS_ONLY("windows") \
143 SOLARIS_ONLY("solaris")
145 #define CPU IA32_ONLY("x86") \
146 IA64_ONLY("ia64") \
147 AMD64_ONLY("amd64") \
148 SPARC_ONLY("sparc")
150 const char *Abstract_VM_Version::vm_platform_string() {
151 return OS "-" CPU;
152 }
154 const char* Abstract_VM_Version::internal_vm_info_string() {
155 #ifndef HOTSPOT_BUILD_USER
156 #define HOTSPOT_BUILD_USER unknown
157 #endif
159 #ifndef HOTSPOT_BUILD_COMPILER
160 #ifdef _MSC_VER
161 #if _MSC_VER == 1100
162 #define HOTSPOT_BUILD_COMPILER "MS VC++ 5.0"
163 #elif _MSC_VER == 1200
164 #define HOTSPOT_BUILD_COMPILER "MS VC++ 6.0"
165 #elif _MSC_VER == 1310
166 #define HOTSPOT_BUILD_COMPILER "MS VC++ 7.1"
167 #elif _MSC_VER == 1400
168 #define HOTSPOT_BUILD_COMPILER "MS VC++ 8.0"
169 #else
170 #define HOTSPOT_BUILD_COMPILER "unknown MS VC++:" XSTR(_MSC_VER)
171 #endif
172 #elif defined(__SUNPRO_CC)
173 #if __SUNPRO_CC == 0x420
174 #define HOTSPOT_BUILD_COMPILER "Workshop 4.2"
175 #elif __SUNPRO_CC == 0x500
176 #define HOTSPOT_BUILD_COMPILER "Workshop 5.0 compat=" XSTR(__SUNPRO_CC_COMPAT)
177 #elif __SUNPRO_CC == 0x520
178 #define HOTSPOT_BUILD_COMPILER "Workshop 5.2 compat=" XSTR(__SUNPRO_CC_COMPAT)
179 #elif __SUNPRO_CC == 0x580
180 #define HOTSPOT_BUILD_COMPILER "Workshop 5.8"
181 #elif __SUNPRO_CC == 0x590
182 #define HOTSPOT_BUILD_COMPILER "Workshop 5.9"
183 #else
184 #define HOTSPOT_BUILD_COMPILER "unknown Workshop:" XSTR(__SUNPRO_CC)
185 #endif
186 #elif defined(__GNUC__)
187 #define HOTSPOT_BUILD_COMPILER "gcc " __VERSION__
188 #else
189 #define HOTSPOT_BUILD_COMPILER "unknown compiler"
190 #endif
191 #endif
194 return VMNAME " (" VM_RELEASE ") for " OS "-" CPU
195 " JRE (" JRE_RELEASE_VERSION "), built on " __DATE__ " " __TIME__
196 " by " XSTR(HOTSPOT_BUILD_USER) " with " HOTSPOT_BUILD_COMPILER;
197 }
199 unsigned int Abstract_VM_Version::jvm_version() {
200 return ((Abstract_VM_Version::vm_major_version() & 0xFF) << 24) |
201 ((Abstract_VM_Version::vm_minor_version() & 0xFF) << 16) |
202 (Abstract_VM_Version::vm_build_number() & 0xFF);
203 }
206 void VM_Version_init() {
207 VM_Version::initialize();
209 #ifndef PRODUCT
210 if (PrintMiscellaneous && Verbose) {
211 os::print_cpu_info(tty);
212 }
213 #endif
214 }
216 unsigned int Abstract_VM_Version::nof_parallel_worker_threads(
217 unsigned int num,
218 unsigned int den,
219 unsigned int switch_pt) {
220 if (FLAG_IS_DEFAULT(ParallelGCThreads)) {
221 assert(ParallelGCThreads == 0, "Default ParallelGCThreads is not 0");
222 // For very large machines, there are diminishing returns
223 // for large numbers of worker threads. Instead of
224 // hogging the whole system, use a fraction of the workers for every
225 // processor after the first 8. For example, on a 72 cpu machine
226 // and a chosen fraction of 5/8
227 // use 8 + (72 - 8) * (5/8) == 48 worker threads.
228 unsigned int ncpus = (unsigned int) os::active_processor_count();
229 return (ncpus <= switch_pt) ?
230 ncpus :
231 (switch_pt + ((ncpus - switch_pt) * num) / den);
232 } else {
233 return ParallelGCThreads;
234 }
235 }
237 unsigned int Abstract_VM_Version::calc_parallel_worker_threads() {
238 return nof_parallel_worker_threads(5, 8, 8);
239 }
242 // Does not set the _initialized flag since it is
243 // a global flag.
244 unsigned int Abstract_VM_Version::parallel_worker_threads() {
245 if (!_parallel_worker_threads_initialized) {
246 if (FLAG_IS_DEFAULT(ParallelGCThreads)) {
247 _parallel_worker_threads = VM_Version::calc_parallel_worker_threads();
248 } else {
249 _parallel_worker_threads = ParallelGCThreads;
250 }
251 _parallel_worker_threads_initialized = true;
252 }
253 return _parallel_worker_threads;
254 }