Mercurial > hg > graal-jvmci-8
annotate src/share/vm/runtime/os.hpp @ 23760:655fd63024d0
move jvmci flag handling to JVMCIGlobals
author | David Leopoldseder <david.d.leopoldseder@oracle.com> |
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date | Fri, 23 Sep 2016 16:33:12 +0200 |
parents | dd9cc155639c |
children | 719853999215 |
rev | line source |
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0 | 1 /* |
17567 | 2 * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved. |
0 | 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 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #ifndef SHARE_VM_RUNTIME_OS_HPP |
26 #define SHARE_VM_RUNTIME_OS_HPP | |
27 | |
28 #include "jvmtifiles/jvmti.h" | |
29 #include "runtime/atomic.hpp" | |
30 #include "runtime/extendedPC.hpp" | |
31 #include "runtime/handles.hpp" | |
32 #include "utilities/top.hpp" | |
33 #ifdef TARGET_OS_FAMILY_linux | |
34 # include "jvm_linux.h" | |
11151 | 35 # include <setjmp.h> |
1972 | 36 #endif |
37 #ifdef TARGET_OS_FAMILY_solaris | |
38 # include "jvm_solaris.h" | |
11151 | 39 # include <setjmp.h> |
1972 | 40 #endif |
41 #ifdef TARGET_OS_FAMILY_windows | |
42 # include "jvm_windows.h" | |
43 #endif | |
14411 | 44 #ifdef TARGET_OS_FAMILY_aix |
45 # include "jvm_aix.h" | |
46 # include <setjmp.h> | |
47 #endif | |
3960 | 48 #ifdef TARGET_OS_FAMILY_bsd |
49 # include "jvm_bsd.h" | |
11151 | 50 # include <setjmp.h> |
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51 # ifdef __APPLE__ |
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52 # include <mach/mach_time.h> |
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53 # endif |
3960 | 54 #endif |
1972 | 55 |
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56 class AgentLibrary; |
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57 |
0 | 58 // os defines the interface to operating system; this includes traditional |
59 // OS services (time, I/O) as well as other functionality with system- | |
60 // dependent code. | |
61 | |
62 typedef void (*dll_func)(...); | |
63 | |
64 class Thread; | |
65 class JavaThread; | |
66 class Event; | |
67 class DLL; | |
68 class FileHandle; | |
20360 | 69 class NativeCallStack; |
70 | |
141 | 71 template<class E> class GrowableArray; |
0 | 72 |
73 // %%%%% Moved ThreadState, START_FN, OSThread to new osThread.hpp. -- Rose | |
74 | |
75 // Platform-independent error return values from OS functions | |
76 enum OSReturn { | |
77 OS_OK = 0, // Operation was successful | |
78 OS_ERR = -1, // Operation failed | |
79 OS_INTRPT = -2, // Operation was interrupted | |
80 OS_TIMEOUT = -3, // Operation timed out | |
81 OS_NOMEM = -5, // Operation failed for lack of memory | |
82 OS_NORESOURCE = -6 // Operation failed for lack of nonmemory resource | |
83 }; | |
84 | |
85 enum ThreadPriority { // JLS 20.20.1-3 | |
86 NoPriority = -1, // Initial non-priority value | |
87 MinPriority = 1, // Minimum priority | |
88 NormPriority = 5, // Normal (non-daemon) priority | |
89 NearMaxPriority = 9, // High priority, used for VMThread | |
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90 MaxPriority = 10, // Highest priority, used for WatcherThread |
0 | 91 // ensures that VMThread doesn't starve profiler |
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92 CriticalPriority = 11 // Critical thread priority |
0 | 93 }; |
94 | |
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95 // Executable parameter flag for os::commit_memory() and |
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96 // os::commit_memory_or_exit(). |
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97 const bool ExecMem = true; |
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98 |
0 | 99 // Typedef for structured exception handling support |
100 typedef void (*java_call_t)(JavaValue* value, methodHandle* method, JavaCallArguments* args, Thread* thread); | |
101 | |
20360 | 102 class MallocTracker; |
103 | |
0 | 104 class os: AllStatic { |
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105 friend class VMStructs; |
20360 | 106 friend class MallocTracker; |
22298 | 107 #if INCLUDE_JVMCI |
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108 friend class Arguments; // need access to format_boot_path |
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109 #endif |
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110 |
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111 public: |
0 | 112 enum { page_sizes_max = 9 }; // Size of _page_sizes array (8 plus a sentinel) |
113 | |
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114 private: |
0 | 115 static OSThread* _starting_thread; |
116 static address _polling_page; | |
117 static volatile int32_t * _mem_serialize_page; | |
118 static uintptr_t _serialize_page_mask; | |
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119 public: |
0 | 120 static size_t _page_sizes[page_sizes_max]; |
121 | |
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122 private: |
0 | 123 static void init_page_sizes(size_t default_page_size) { |
124 _page_sizes[0] = default_page_size; | |
125 _page_sizes[1] = 0; // sentinel | |
126 } | |
127 | |
6197 | 128 static char* pd_reserve_memory(size_t bytes, char* addr = 0, |
129 size_t alignment_hint = 0); | |
130 static char* pd_attempt_reserve_memory_at(size_t bytes, char* addr); | |
131 static void pd_split_reserved_memory(char *base, size_t size, | |
132 size_t split, bool realloc); | |
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133 static bool pd_commit_memory(char* addr, size_t bytes, bool executable); |
6197 | 134 static bool pd_commit_memory(char* addr, size_t size, size_t alignment_hint, |
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135 bool executable); |
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136 // Same as pd_commit_memory() that either succeeds or calls |
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137 // vm_exit_out_of_memory() with the specified mesg. |
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138 static void pd_commit_memory_or_exit(char* addr, size_t bytes, |
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139 bool executable, const char* mesg); |
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140 static void pd_commit_memory_or_exit(char* addr, size_t size, |
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141 size_t alignment_hint, |
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142 bool executable, const char* mesg); |
6197 | 143 static bool pd_uncommit_memory(char* addr, size_t bytes); |
144 static bool pd_release_memory(char* addr, size_t bytes); | |
145 | |
146 static char* pd_map_memory(int fd, const char* file_name, size_t file_offset, | |
147 char *addr, size_t bytes, bool read_only = false, | |
148 bool allow_exec = false); | |
149 static char* pd_remap_memory(int fd, const char* file_name, size_t file_offset, | |
150 char *addr, size_t bytes, bool read_only, | |
151 bool allow_exec); | |
152 static bool pd_unmap_memory(char *addr, size_t bytes); | |
153 static void pd_free_memory(char *addr, size_t bytes, size_t alignment_hint); | |
154 static void pd_realign_memory(char *addr, size_t bytes, size_t alignment_hint); | |
155 | |
22976 | 156 static size_t page_size_for_region(size_t region_size, size_t min_pages, bool must_be_aligned); |
6197 | 157 |
0 | 158 public: |
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159 static void init(void); // Called before command line parsing |
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160 static void init_before_ergo(void); // Called after command line parsing |
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161 // before VM ergonomics processing. |
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162 static jint init_2(void); // Called after command line parsing |
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163 // and VM ergonomics processing |
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164 static void init_globals(void) { // Called from init_globals() in init.cpp |
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165 init_globals_ext(); |
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166 } |
0 | 167 |
168 // File names are case-insensitive on windows only | |
169 // Override me as needed | |
170 static int file_name_strcmp(const char* s1, const char* s2); | |
171 | |
20360 | 172 // get/unset environment variable |
0 | 173 static bool getenv(const char* name, char* buffer, int len); |
20360 | 174 static bool unsetenv(const char* name); |
175 | |
0 | 176 static bool have_special_privileges(); |
177 | |
178 static jlong javaTimeMillis(); | |
179 static jlong javaTimeNanos(); | |
180 static void javaTimeNanos_info(jvmtiTimerInfo *info_ptr); | |
181 static void run_periodic_checks(); | |
182 | |
183 | |
184 // Returns the elapsed time in seconds since the vm started. | |
185 static double elapsedTime(); | |
186 | |
187 // Returns real time in seconds since an arbitrary point | |
188 // in the past. | |
189 static bool getTimesSecs(double* process_real_time, | |
190 double* process_user_time, | |
191 double* process_system_time); | |
192 | |
193 // Interface to the performance counter | |
194 static jlong elapsed_counter(); | |
195 static jlong elapsed_frequency(); | |
196 | |
342
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197 // The "virtual time" of a thread is the amount of time a thread has |
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198 // actually run. The first function indicates whether the OS supports |
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199 // this functionality for the current thread, and if so: |
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200 // * the second enables vtime tracking (if that is required). |
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201 // * the third tells whether vtime is enabled. |
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202 // * the fourth returns the elapsed virtual time for the current |
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203 // thread. |
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204 static bool supports_vtime(); |
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205 static bool enable_vtime(); |
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206 static bool vtime_enabled(); |
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207 static double elapsedVTime(); |
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208 |
0 | 209 // Return current local time in a string (YYYY-MM-DD HH:MM:SS). |
210 // It is MT safe, but not async-safe, as reading time zone | |
211 // information may require a lock on some platforms. | |
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212 static char* local_time_string(char *buf, size_t buflen); |
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213 static struct tm* localtime_pd (const time_t* clock, struct tm* res); |
0 | 214 // Fill in buffer with current local time as an ISO-8601 string. |
215 // E.g., YYYY-MM-DDThh:mm:ss.mmm+zzzz. | |
216 // Returns buffer, or NULL if it failed. | |
217 static char* iso8601_time(char* buffer, size_t buffer_length); | |
218 | |
219 // Interface for detecting multiprocessor system | |
220 static inline bool is_MP() { | |
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221 // During bootstrap if _processor_count is not yet initialized |
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222 // we claim to be MP as that is safest. If any platform has a |
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223 // stub generator that might be triggered in this phase and for |
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224 // which being declared MP when in fact not, is a problem - then |
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225 // the bootstrap routine for the stub generator needs to check |
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226 // the processor count directly and leave the bootstrap routine |
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227 // in place until called after initialization has ocurred. |
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228 return (_processor_count != 1) || AssumeMP; |
0 | 229 } |
230 static julong available_memory(); | |
231 static julong physical_memory(); | |
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232 static bool has_allocatable_memory_limit(julong* limit); |
0 | 233 static bool is_server_class_machine(); |
234 | |
235 // number of CPUs | |
236 static int processor_count() { | |
237 return _processor_count; | |
238 } | |
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239 static void set_processor_count(int count) { _processor_count = count; } |
0 | 240 |
241 // Returns the number of CPUs this process is currently allowed to run on. | |
242 // Note that on some OSes this can change dynamically. | |
243 static int active_processor_count(); | |
244 | |
245 // Bind processes to processors. | |
246 // This is a two step procedure: | |
247 // first you generate a distribution of processes to processors, | |
248 // then you bind processes according to that distribution. | |
249 // Compute a distribution for number of processes to processors. | |
250 // Stores the processor id's into the distribution array argument. | |
251 // Returns true if it worked, false if it didn't. | |
252 static bool distribute_processes(uint length, uint* distribution); | |
253 // Binds the current process to a processor. | |
254 // Returns true if it worked, false if it didn't. | |
255 static bool bind_to_processor(uint processor_id); | |
256 | |
4006 | 257 // Give a name to the current thread. |
258 static void set_native_thread_name(const char *name); | |
259 | |
0 | 260 // Interface for stack banging (predetect possible stack overflow for |
261 // exception processing) There are guard pages, and above that shadow | |
262 // pages for stack overflow checking. | |
263 static bool uses_stack_guard_pages(); | |
264 static bool allocate_stack_guard_pages(); | |
265 static void bang_stack_shadow_pages(); | |
266 static bool stack_shadow_pages_available(Thread *thread, methodHandle method); | |
267 | |
268 // OS interface to Virtual Memory | |
269 | |
270 // Return the default page size. | |
271 static int vm_page_size(); | |
272 | |
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273 // Returns the page size to use for a region of memory. |
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274 // region_size / min_pages will always be greater than or equal to the |
22976 | 275 // returned value. The returned value will divide region_size. |
276 static size_t page_size_for_region_aligned(size_t region_size, size_t min_pages); | |
277 | |
278 // Returns the page size to use for a region of memory. | |
279 // region_size / min_pages will always be greater than or equal to the | |
280 // returned value. The returned value might not divide region_size. | |
281 static size_t page_size_for_region_unaligned(size_t region_size, size_t min_pages); | |
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282 |
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283 // Return the largest page size that can be used |
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284 static size_t max_page_size() { |
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285 // The _page_sizes array is sorted in descending order. |
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286 return _page_sizes[0]; |
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287 } |
0 | 288 |
3859 | 289 // Methods for tracing page sizes returned by the above method; enabled by |
0 | 290 // TracePageSizes. The region_{min,max}_size parameters should be the values |
291 // passed to page_size_for_region() and page_size should be the result of that | |
292 // call. The (optional) base and size parameters should come from the | |
293 // ReservedSpace base() and size() methods. | |
3859 | 294 static void trace_page_sizes(const char* str, const size_t* page_sizes, |
295 int count) PRODUCT_RETURN; | |
0 | 296 static void trace_page_sizes(const char* str, const size_t region_min_size, |
297 const size_t region_max_size, | |
298 const size_t page_size, | |
299 const char* base = NULL, | |
300 const size_t size = 0) PRODUCT_RETURN; | |
301 | |
302 static int vm_allocation_granularity(); | |
303 static char* reserve_memory(size_t bytes, char* addr = 0, | |
304 size_t alignment_hint = 0); | |
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305 static char* reserve_memory(size_t bytes, char* addr, |
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306 size_t alignment_hint, MEMFLAGS flags); |
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307 static char* reserve_memory_aligned(size_t size, size_t alignment); |
0 | 308 static char* attempt_reserve_memory_at(size_t bytes, char* addr); |
309 static void split_reserved_memory(char *base, size_t size, | |
310 size_t split, bool realloc); | |
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311 static bool commit_memory(char* addr, size_t bytes, bool executable); |
656 | 312 static bool commit_memory(char* addr, size_t size, size_t alignment_hint, |
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313 bool executable); |
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314 // Same as commit_memory() that either succeeds or calls |
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315 // vm_exit_out_of_memory() with the specified mesg. |
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316 static void commit_memory_or_exit(char* addr, size_t bytes, |
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317 bool executable, const char* mesg); |
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318 static void commit_memory_or_exit(char* addr, size_t size, |
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319 size_t alignment_hint, |
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320 bool executable, const char* mesg); |
0 | 321 static bool uncommit_memory(char* addr, size_t bytes); |
322 static bool release_memory(char* addr, size_t bytes); | |
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323 |
22973 | 324 // Touch memory pages that cover the memory range from start to end (exclusive) |
325 // to make the OS back the memory range with actual memory. | |
326 // Current implementation may not touch the last page if unaligned addresses | |
327 // are passed. | |
328 static void pretouch_memory(char* start, char* end); | |
329 | |
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330 enum ProtType { MEM_PROT_NONE, MEM_PROT_READ, MEM_PROT_RW, MEM_PROT_RWX }; |
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331 static bool protect_memory(char* addr, size_t bytes, ProtType prot, |
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332 bool is_committed = true); |
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333 |
0 | 334 static bool guard_memory(char* addr, size_t bytes); |
335 static bool unguard_memory(char* addr, size_t bytes); | |
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336 static bool create_stack_guard_pages(char* addr, size_t bytes); |
6197 | 337 static bool pd_create_stack_guard_pages(char* addr, size_t bytes); |
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338 static bool remove_stack_guard_pages(char* addr, size_t bytes); |
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339 |
0 | 340 static char* map_memory(int fd, const char* file_name, size_t file_offset, |
341 char *addr, size_t bytes, bool read_only = false, | |
342 bool allow_exec = false); | |
343 static char* remap_memory(int fd, const char* file_name, size_t file_offset, | |
344 char *addr, size_t bytes, bool read_only, | |
345 bool allow_exec); | |
346 static bool unmap_memory(char *addr, size_t bytes); | |
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347 static void free_memory(char *addr, size_t bytes, size_t alignment_hint); |
0 | 348 static void realign_memory(char *addr, size_t bytes, size_t alignment_hint); |
349 | |
350 // NUMA-specific interface | |
141 | 351 static bool numa_has_static_binding(); |
352 static bool numa_has_group_homing(); | |
353 static void numa_make_local(char *addr, size_t bytes, int lgrp_hint); | |
0 | 354 static void numa_make_global(char *addr, size_t bytes); |
355 static size_t numa_get_groups_num(); | |
356 static size_t numa_get_leaf_groups(int *ids, size_t size); | |
357 static bool numa_topology_changed(); | |
358 static int numa_get_group_id(); | |
359 | |
360 // Page manipulation | |
361 struct page_info { | |
362 size_t size; | |
363 int lgrp_id; | |
364 }; | |
365 static bool get_page_info(char *start, page_info* info); | |
366 static char* scan_pages(char *start, char* end, page_info* page_expected, page_info* page_found); | |
367 | |
368 static char* non_memory_address_word(); | |
369 // reserve, commit and pin the entire memory region | |
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370 static char* reserve_memory_special(size_t size, size_t alignment, |
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371 char* addr, bool executable); |
0 | 372 static bool release_memory_special(char* addr, size_t bytes); |
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373 static void large_page_init(); |
0 | 374 static size_t large_page_size(); |
375 static bool can_commit_large_page_memory(); | |
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376 static bool can_execute_large_page_memory(); |
0 | 377 |
378 // OS interface to polling page | |
379 static address get_polling_page() { return _polling_page; } | |
380 static void set_polling_page(address page) { _polling_page = page; } | |
381 static bool is_poll_address(address addr) { return addr >= _polling_page && addr < (_polling_page + os::vm_page_size()); } | |
382 static void make_polling_page_unreadable(); | |
383 static void make_polling_page_readable(); | |
384 | |
385 // Routines used to serialize the thread state without using membars | |
386 static void serialize_thread_states(); | |
387 | |
388 // Since we write to the serialize page from every thread, we | |
389 // want stores to be on unique cache lines whenever possible | |
390 // in order to minimize CPU cross talk. We pre-compute the | |
391 // amount to shift the thread* to make this offset unique to | |
392 // each thread. | |
393 static int get_serialize_page_shift_count() { | |
394 return SerializePageShiftCount; | |
395 } | |
396 | |
397 static void set_serialize_page_mask(uintptr_t mask) { | |
398 _serialize_page_mask = mask; | |
399 } | |
400 | |
401 static unsigned int get_serialize_page_mask() { | |
402 return _serialize_page_mask; | |
403 } | |
404 | |
405 static void set_memory_serialize_page(address page); | |
406 | |
407 static address get_memory_serialize_page() { | |
408 return (address)_mem_serialize_page; | |
409 } | |
410 | |
411 static inline void write_memory_serialize_page(JavaThread *thread) { | |
412 uintptr_t page_offset = ((uintptr_t)thread >> | |
413 get_serialize_page_shift_count()) & | |
414 get_serialize_page_mask(); | |
415 *(volatile int32_t *)((uintptr_t)_mem_serialize_page+page_offset) = 1; | |
416 } | |
417 | |
418 static bool is_memory_serialize_page(JavaThread *thread, address addr) { | |
419 if (UseMembar) return false; | |
1078 | 420 // Previously this function calculated the exact address of this |
421 // thread's serialize page, and checked if the faulting address | |
422 // was equal. However, some platforms mask off faulting addresses | |
423 // to the page size, so now we just check that the address is | |
424 // within the page. This makes the thread argument unnecessary, | |
425 // but we retain the NULL check to preserve existing behaviour. | |
0 | 426 if (thread == NULL) return false; |
1078 | 427 address page = (address) _mem_serialize_page; |
428 return addr >= page && addr < (page + os::vm_page_size()); | |
0 | 429 } |
430 | |
431 static void block_on_serialize_page_trap(); | |
432 | |
433 // threads | |
434 | |
435 enum ThreadType { | |
436 vm_thread, | |
437 cgc_thread, // Concurrent GC thread | |
438 pgc_thread, // Parallel GC thread | |
439 java_thread, | |
440 compiler_thread, | |
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441 watcher_thread, |
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442 os_thread |
0 | 443 }; |
444 | |
445 static bool create_thread(Thread* thread, | |
446 ThreadType thr_type, | |
447 size_t stack_size = 0); | |
448 static bool create_main_thread(JavaThread* thread); | |
449 static bool create_attached_thread(JavaThread* thread); | |
450 static void pd_start_thread(Thread* thread); | |
451 static void start_thread(Thread* thread); | |
452 | |
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453 static void initialize_thread(Thread* thr); |
0 | 454 static void free_thread(OSThread* osthread); |
455 | |
456 // thread id on Linux/64bit is 64bit, on Windows and Solaris, it's 32bit | |
457 static intx current_thread_id(); | |
458 static int current_process_id(); | |
459 static int sleep(Thread* thread, jlong ms, bool interruptable); | |
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460 // Short standalone OS sleep suitable for slow path spin loop. |
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461 // Ignores Thread.interrupt() (so keep it short). |
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462 // ms = 0, will sleep for the least amount of time allowed by the OS. |
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463 static void naked_short_sleep(jlong ms); |
0 | 464 static void infinite_sleep(); // never returns, use with CAUTION |
465 static void yield(); // Yields to all threads with same priority | |
466 enum YieldResult { | |
467 YIELD_SWITCHED = 1, // caller descheduled, other ready threads exist & ran | |
468 YIELD_NONEREADY = 0, // No other runnable/ready threads. | |
469 // platform-specific yield return immediately | |
470 YIELD_UNKNOWN = -1 // Unknown: platform doesn't support _SWITCHED or _NONEREADY | |
471 // YIELD_SWITCHED and YIELD_NONREADY imply the platform supports a "strong" | |
472 // yield that can be used in lieu of blocking. | |
473 } ; | |
474 static YieldResult NakedYield () ; | |
475 static void yield_all(int attempts = 0); // Yields to all other threads including lower priority | |
476 static void loop_breaker(int attempts); // called from within tight loops to possibly influence time-sharing | |
477 static OSReturn set_priority(Thread* thread, ThreadPriority priority); | |
478 static OSReturn get_priority(const Thread* const thread, ThreadPriority& priority); | |
479 | |
480 static void interrupt(Thread* thread); | |
481 static bool is_interrupted(Thread* thread, bool clear_interrupted); | |
482 | |
483 static int pd_self_suspend_thread(Thread* thread); | |
484 | |
485 static ExtendedPC fetch_frame_from_context(void* ucVoid, intptr_t** sp, intptr_t** fp); | |
486 static frame fetch_frame_from_context(void* ucVoid); | |
487 | |
488 static ExtendedPC get_thread_pc(Thread *thread); | |
489 static void breakpoint(); | |
490 | |
491 static address current_stack_pointer(); | |
492 static address current_stack_base(); | |
493 static size_t current_stack_size(); | |
494 | |
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495 static void verify_stack_alignment() PRODUCT_RETURN; |
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496 |
0 | 497 static int message_box(const char* title, const char* message); |
498 static char* do_you_want_to_debug(const char* message); | |
499 | |
500 // run cmd in a separate process and return its exit code; or -1 on failures | |
501 static int fork_and_exec(char *cmd); | |
502 | |
503 // os::exit() is merged with vm_exit() | |
504 // static void exit(int num); | |
505 | |
506 // Terminate the VM, but don't exit the process | |
507 static void shutdown(); | |
508 | |
509 // Terminate with an error. Default is to generate a core file on platforms | |
510 // that support such things. This calls shutdown() and then aborts. | |
511 static void abort(bool dump_core = true); | |
512 | |
513 // Die immediately, no exit hook, no abort hook, no cleanup. | |
514 static void die(); | |
515 | |
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516 // File i/o operations |
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517 static const int default_file_open_flags(); |
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518 static int open(const char *path, int oflag, int mode); |
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519 static FILE* open(int fd, const char* mode); |
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520 static int close(int fd); |
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521 static jlong lseek(int fd, jlong offset, int whence); |
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522 static char* native_path(char *path); |
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523 static int ftruncate(int fd, jlong length); |
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524 static int fsync(int fd); |
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525 static int available(int fd, jlong *bytes); |
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526 |
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527 //File i/o operations |
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528 |
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529 static size_t read(int fd, void *buf, unsigned int nBytes); |
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530 static size_t restartable_read(int fd, void *buf, unsigned int nBytes); |
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531 static size_t write(int fd, const void *buf, unsigned int nBytes); |
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532 |
0 | 533 // Reading directories. |
534 static DIR* opendir(const char* dirname); | |
535 static int readdir_buf_size(const char *path); | |
536 static struct dirent* readdir(DIR* dirp, dirent* dbuf); | |
537 static int closedir(DIR* dirp); | |
538 | |
539 // Dynamic library extension | |
540 static const char* dll_file_extension(); | |
541 | |
542 static const char* get_temp_directory(); | |
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543 static const char* get_current_directory(char *buf, size_t buflen); |
0 | 544 |
242 | 545 // Builds a platform-specific full library path given a ld path and lib name |
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546 // Returns true if buffer contains full path to existing file, false otherwise |
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547 static bool dll_build_name(char* buffer, size_t size, |
242 | 548 const char* pathname, const char* fname); |
549 | |
0 | 550 // Symbol lookup, find nearest function name; basically it implements |
551 // dladdr() for all platforms. Name of the nearest function is copied | |
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552 // to buf. Distance from its base address is optionally returned as offset. |
0 | 553 // If function name is not found, buf[0] is set to '\0' and offset is |
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554 // set to -1 (if offset is non-NULL). |
0 | 555 static bool dll_address_to_function_name(address addr, char* buf, |
556 int buflen, int* offset); | |
557 | |
558 // Locate DLL/DSO. On success, full path of the library is copied to | |
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559 // buf, and offset is optionally set to be the distance between addr |
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560 // and the library's base address. On failure, buf[0] is set to '\0' |
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561 // and offset is set to -1 (if offset is non-NULL). |
0 | 562 static bool dll_address_to_library_name(address addr, char* buf, |
563 int buflen, int* offset); | |
564 | |
565 // Find out whether the pc is in the static code for jvm.dll/libjvm.so. | |
566 static bool address_is_in_vm(address addr); | |
567 | |
568 // Loads .dll/.so and | |
569 // in case of error it checks if .dll/.so was built for the | |
570 // same architecture as Hotspot is running on | |
571 static void* dll_load(const char *name, char *ebuf, int ebuflen); | |
572 | |
242 | 573 // lookup symbol in a shared library |
574 static void* dll_lookup(void* handle, const char* name); | |
575 | |
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576 // Unload library |
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577 static void dll_unload(void *lib); |
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578 |
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579 // Return the handle of this process |
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580 static void* get_default_process_handle(); |
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581 |
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582 // Check for static linked agent library |
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583 static bool find_builtin_agent(AgentLibrary *agent_lib, const char *syms[], |
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584 size_t syms_len); |
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585 |
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586 // Find agent entry point |
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587 static void *find_agent_function(AgentLibrary *agent_lib, bool check_lib, |
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588 const char *syms[], size_t syms_len); |
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589 |
0 | 590 // Print out system information; they are called by fatal error handler. |
591 // Output format may be different on different platforms. | |
592 static void print_os_info(outputStream* st); | |
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593 static void print_os_info_brief(outputStream* st); |
0 | 594 static void print_cpu_info(outputStream* st); |
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595 static void pd_print_cpu_info(outputStream* st); |
0 | 596 static void print_memory_info(outputStream* st); |
597 static void print_dll_info(outputStream* st); | |
598 static void print_environment_variables(outputStream* st, const char** env_list, char* buffer, int len); | |
599 static void print_context(outputStream* st, void* context); | |
1907 | 600 static void print_register_info(outputStream* st, void* context); |
0 | 601 static void print_siginfo(outputStream* st, void* siginfo); |
602 static void print_signal_handlers(outputStream* st, char* buf, size_t buflen); | |
603 static void print_date_and_time(outputStream* st); | |
604 | |
1907 | 605 static void print_location(outputStream* st, intptr_t x, bool verbose = false); |
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606 static size_t lasterror(char *buf, size_t len); |
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607 static int get_last_error(); |
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608 |
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609 // Determines whether the calling process is being debugged by a user-mode debugger. |
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610 static bool is_debugger_attached(); |
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611 |
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612 // wait for a key press if PauseAtExit is set |
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613 static void wait_for_keypress_at_exit(void); |
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614 |
0 | 615 // The following two functions are used by fatal error handler to trace |
616 // native (C) frames. They are not part of frame.hpp/frame.cpp because | |
617 // frame.hpp/cpp assume thread is JavaThread, and also because different | |
618 // OS/compiler may have different convention or provide different API to | |
619 // walk C frames. | |
620 // | |
621 // We don't attempt to become a debugger, so we only follow frames if that | |
622 // does not require a lookup in the unwind table, which is part of the binary | |
623 // file but may be unsafe to read after a fatal error. So on x86, we can | |
624 // only walk stack if %ebp is used as frame pointer; on ia64, it's not | |
625 // possible to walk C stack without having the unwind table. | |
626 static bool is_first_C_frame(frame *fr); | |
627 static frame get_sender_for_C_frame(frame *fr); | |
628 | |
629 // return current frame. pc() and sp() are set to NULL on failure. | |
630 static frame current_frame(); | |
631 | |
632 static void print_hex_dump(outputStream* st, address start, address end, int unitsize); | |
633 | |
634 // returns a string to describe the exception/signal; | |
635 // returns NULL if exception_code is not an OS exception/signal. | |
636 static const char* exception_name(int exception_code, char* buf, size_t buflen); | |
637 | |
638 // Returns native Java library, loads if necessary | |
639 static void* native_java_library(); | |
640 | |
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641 // Fills in path to jvm.dll/libjvm.so (used by the Disassembler) |
0 | 642 static void jvm_path(char *buf, jint buflen); |
643 | |
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644 // Returns true if we are running in a headless jre. |
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645 static bool is_headless_jre(); |
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646 |
0 | 647 // JNI names |
648 static void print_jni_name_prefix_on(outputStream* st, int args_size); | |
649 static void print_jni_name_suffix_on(outputStream* st, int args_size); | |
650 | |
651 // File conventions | |
652 static const char* file_separator(); | |
653 static const char* line_separator(); | |
654 static const char* path_separator(); | |
655 | |
656 // Init os specific system properties values | |
657 static void init_system_properties_values(); | |
658 | |
659 // IO operations, non-JVM_ version. | |
660 static int stat(const char* path, struct stat* sbuf); | |
661 static bool dir_is_empty(const char* path); | |
662 | |
663 // IO operations on binary files | |
664 static int create_binary_file(const char* path, bool rewrite_existing); | |
665 static jlong current_file_offset(int fd); | |
666 static jlong seek_to_file_offset(int fd, jlong offset); | |
667 | |
668 // Thread Local Storage | |
669 static int allocate_thread_local_storage(); | |
670 static void thread_local_storage_at_put(int index, void* value); | |
671 static void* thread_local_storage_at(int index); | |
672 static void free_thread_local_storage(int index); | |
673 | |
20360 | 674 // Retrieve native stack frames. |
675 // Parameter: | |
676 // stack: an array to storage stack pointers. | |
677 // frames: size of above array. | |
678 // toSkip: number of stack frames to skip at the beginning. | |
679 // Return: number of stack frames captured. | |
680 static int get_native_stack(address* stack, int size, int toSkip = 0); | |
6197 | 681 |
0 | 682 // General allocation (must be MT-safe) |
20360 | 683 static void* malloc (size_t size, MEMFLAGS flags, const NativeCallStack& stack); |
684 static void* malloc (size_t size, MEMFLAGS flags); | |
685 static void* realloc (void *memblock, size_t size, MEMFLAGS flag, const NativeCallStack& stack); | |
686 static void* realloc (void *memblock, size_t size, MEMFLAGS flag); | |
687 | |
6197 | 688 static void free (void *memblock, MEMFLAGS flags = mtNone); |
0 | 689 static bool check_heap(bool force = false); // verify C heap integrity |
6197 | 690 static char* strdup(const char *, MEMFLAGS flags = mtInternal); // Like strdup |
0 | 691 |
692 #ifndef PRODUCT | |
2250 | 693 static julong num_mallocs; // # of calls to malloc/realloc |
694 static julong alloc_bytes; // # of bytes allocated | |
695 static julong num_frees; // # of calls to free | |
696 static julong free_bytes; // # of bytes freed | |
0 | 697 #endif |
698 | |
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699 // SocketInterface (ex HPI SocketInterface ) |
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700 static int socket(int domain, int type, int protocol); |
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701 static int socket_close(int fd); |
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702 static int socket_shutdown(int fd, int howto); |
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703 static int recv(int fd, char* buf, size_t nBytes, uint flags); |
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704 static int send(int fd, char* buf, size_t nBytes, uint flags); |
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705 static int raw_send(int fd, char* buf, size_t nBytes, uint flags); |
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706 static int timeout(int fd, long timeout); |
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707 static int listen(int fd, int count); |
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708 static int connect(int fd, struct sockaddr* him, socklen_t len); |
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709 static int bind(int fd, struct sockaddr* him, socklen_t len); |
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710 static int accept(int fd, struct sockaddr* him, socklen_t* len); |
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711 static int recvfrom(int fd, char* buf, size_t nbytes, uint flags, |
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712 struct sockaddr* from, socklen_t* fromlen); |
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713 static int get_sock_name(int fd, struct sockaddr* him, socklen_t* len); |
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714 static int sendto(int fd, char* buf, size_t len, uint flags, |
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715 struct sockaddr* to, socklen_t tolen); |
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716 static int socket_available(int fd, jint* pbytes); |
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717 |
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718 static int get_sock_opt(int fd, int level, int optname, |
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719 char* optval, socklen_t* optlen); |
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720 static int set_sock_opt(int fd, int level, int optname, |
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721 const char* optval, socklen_t optlen); |
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722 static int get_host_name(char* name, int namelen); |
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723 |
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724 static struct hostent* get_host_by_name(char* name); |
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725 |
0 | 726 // Support for signals (see JVM_RaiseSignal, JVM_RegisterSignal) |
727 static void signal_init(); | |
728 static void signal_init_pd(); | |
729 static void signal_notify(int signal_number); | |
730 static void* signal(int signal_number, void* handler); | |
731 static void signal_raise(int signal_number); | |
732 static int signal_wait(); | |
733 static int signal_lookup(); | |
734 static void* user_handler(); | |
735 static void terminate_signal_thread(); | |
736 static int sigexitnum_pd(); | |
737 | |
738 // random number generation | |
739 static long random(); // return 32bit pseudorandom number | |
740 static void init_random(long initval); // initialize random sequence | |
741 | |
742 // Structured OS Exception support | |
743 static void os_exception_wrapper(java_call_t f, JavaValue* value, methodHandle* method, JavaCallArguments* args, Thread* thread); | |
744 | |
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745 // On Windows this will create an actual minidump, on Linux/Solaris it will simply check core dump limits |
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746 static void check_or_create_dump(void* exceptionRecord, void* contextRecord, char* buffer, size_t bufferSize); |
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747 |
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748 // Get the default path to the core file |
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749 // Returns the length of the string |
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750 static int get_core_path(char* buffer, size_t bufferSize); |
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751 |
0 | 752 // JVMTI & JVM monitoring and management support |
753 // The thread_cpu_time() and current_thread_cpu_time() are only | |
754 // supported if is_thread_cpu_time_supported() returns true. | |
755 // They are not supported on Solaris T1. | |
756 | |
757 // Thread CPU Time - return the fast estimate on a platform | |
758 // On Solaris - call gethrvtime (fast) - user time only | |
759 // On Linux - fast clock_gettime where available - user+sys | |
760 // - otherwise: very slow /proc fs - user+sys | |
761 // On Windows - GetThreadTimes - user+sys | |
762 static jlong current_thread_cpu_time(); | |
763 static jlong thread_cpu_time(Thread* t); | |
764 | |
765 // Thread CPU Time with user_sys_cpu_time parameter. | |
766 // | |
767 // If user_sys_cpu_time is true, user+sys time is returned. | |
768 // Otherwise, only user time is returned | |
769 static jlong current_thread_cpu_time(bool user_sys_cpu_time); | |
770 static jlong thread_cpu_time(Thread* t, bool user_sys_cpu_time); | |
771 | |
772 // Return a bunch of info about the timers. | |
773 // Note that the returned info for these two functions may be different | |
774 // on some platforms | |
775 static void current_thread_cpu_time_info(jvmtiTimerInfo *info_ptr); | |
776 static void thread_cpu_time_info(jvmtiTimerInfo *info_ptr); | |
777 | |
778 static bool is_thread_cpu_time_supported(); | |
779 | |
780 // System loadavg support. Returns -1 if load average cannot be obtained. | |
781 static int loadavg(double loadavg[], int nelem); | |
782 | |
783 // Hook for os specific jvm options that we don't want to abort on seeing | |
784 static bool obsolete_option(const JavaVMOption *option); | |
785 | |
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786 // Extensions |
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787 #include "runtime/os_ext.hpp" |
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788 |
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789 public: |
11151 | 790 class CrashProtectionCallback : public StackObj { |
791 public: | |
792 virtual void call() = 0; | |
793 }; | |
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794 |
0 | 795 // Platform dependent stuff |
1972 | 796 #ifdef TARGET_OS_FAMILY_linux |
797 # include "os_linux.hpp" | |
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798 # include "os_posix.hpp" |
1972 | 799 #endif |
800 #ifdef TARGET_OS_FAMILY_solaris | |
801 # include "os_solaris.hpp" | |
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802 # include "os_posix.hpp" |
1972 | 803 #endif |
804 #ifdef TARGET_OS_FAMILY_windows | |
805 # include "os_windows.hpp" | |
806 #endif | |
14411 | 807 #ifdef TARGET_OS_FAMILY_aix |
808 # include "os_aix.hpp" | |
809 # include "os_posix.hpp" | |
810 #endif | |
3960 | 811 #ifdef TARGET_OS_FAMILY_bsd |
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812 # include "os_posix.hpp" |
3960 | 813 # include "os_bsd.hpp" |
814 #endif | |
1972 | 815 #ifdef TARGET_OS_ARCH_linux_x86 |
816 # include "os_linux_x86.hpp" | |
817 #endif | |
818 #ifdef TARGET_OS_ARCH_linux_sparc | |
819 # include "os_linux_sparc.hpp" | |
820 #endif | |
821 #ifdef TARGET_OS_ARCH_linux_zero | |
822 # include "os_linux_zero.hpp" | |
823 #endif | |
824 #ifdef TARGET_OS_ARCH_solaris_x86 | |
825 # include "os_solaris_x86.hpp" | |
826 #endif | |
827 #ifdef TARGET_OS_ARCH_solaris_sparc | |
828 # include "os_solaris_sparc.hpp" | |
829 #endif | |
830 #ifdef TARGET_OS_ARCH_windows_x86 | |
831 # include "os_windows_x86.hpp" | |
832 #endif | |
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833 #ifdef TARGET_OS_ARCH_linux_arm |
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834 # include "os_linux_arm.hpp" |
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835 #endif |
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836 #ifdef TARGET_OS_ARCH_linux_ppc |
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837 # include "os_linux_ppc.hpp" |
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838 #endif |
14411 | 839 #ifdef TARGET_OS_ARCH_aix_ppc |
840 # include "os_aix_ppc.hpp" | |
841 #endif | |
3960 | 842 #ifdef TARGET_OS_ARCH_bsd_x86 |
843 # include "os_bsd_x86.hpp" | |
844 #endif | |
845 #ifdef TARGET_OS_ARCH_bsd_zero | |
846 # include "os_bsd_zero.hpp" | |
847 #endif | |
1972 | 848 |
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849 public: |
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850 #ifndef PLATFORM_PRINT_NATIVE_STACK |
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851 // No platform-specific code for printing the native stack. |
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852 static bool platform_print_native_stack(outputStream* st, void* context, |
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853 char *buf, int buf_size) { |
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854 return false; |
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855 } |
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856 #endif |
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857 |
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858 // debugging support (mostly used by debug.cpp but also fatal error handler) |
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859 static bool find(address pc, outputStream* st = tty); // OS specific function to make sense out of an address |
0 | 860 |
861 static bool dont_yield(); // when true, JVM_Yield() is nop | |
862 static void print_statistics(); | |
863 | |
864 // Thread priority helpers (implemented in OS-specific part) | |
865 static OSReturn set_native_priority(Thread* thread, int native_prio); | |
866 static OSReturn get_native_priority(const Thread* const thread, int* priority_ptr); | |
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867 static int java_to_os_priority[CriticalPriority + 1]; |
0 | 868 // Hint to the underlying OS that a task switch would not be good. |
869 // Void return because it's a hint and can fail. | |
870 static void hint_no_preempt(); | |
871 | |
872 // Used at creation if requested by the diagnostic flag PauseAtStartup. | |
873 // Causes the VM to wait until an external stimulus has been applied | |
874 // (for Unix, that stimulus is a signal, for Windows, an external | |
875 // ResumeThread call) | |
876 static void pause(); | |
877 | |
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878 // Builds a platform dependent Agent_OnLoad_<libname> function name |
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879 // which is used to find statically linked in agents. |
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880 static char* build_agent_function_name(const char *sym, const char *cname, |
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881 bool is_absolute_path); |
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882 |
10405 | 883 class SuspendedThreadTaskContext { |
884 public: | |
885 SuspendedThreadTaskContext(Thread* thread, void *ucontext) : _thread(thread), _ucontext(ucontext) {} | |
886 Thread* thread() const { return _thread; } | |
887 void* ucontext() const { return _ucontext; } | |
888 private: | |
889 Thread* _thread; | |
890 void* _ucontext; | |
891 }; | |
892 | |
893 class SuspendedThreadTask { | |
894 public: | |
895 SuspendedThreadTask(Thread* thread) : _thread(thread), _done(false) {} | |
896 virtual ~SuspendedThreadTask() {} | |
897 void run(); | |
898 bool is_done() { return _done; } | |
899 virtual void do_task(const SuspendedThreadTaskContext& context) = 0; | |
900 protected: | |
901 private: | |
902 void internal_do_task(); | |
903 Thread* _thread; | |
904 bool _done; | |
905 }; | |
906 | |
907 #ifndef TARGET_OS_FAMILY_windows | |
908 // Suspend/resume support | |
909 // Protocol: | |
910 // | |
911 // a thread starts in SR_RUNNING | |
912 // | |
913 // SR_RUNNING can go to | |
914 // * SR_SUSPEND_REQUEST when the WatcherThread wants to suspend it | |
915 // SR_SUSPEND_REQUEST can go to | |
916 // * SR_RUNNING if WatcherThread decides it waited for SR_SUSPENDED too long (timeout) | |
917 // * SR_SUSPENDED if the stopped thread receives the signal and switches state | |
918 // SR_SUSPENDED can go to | |
919 // * SR_WAKEUP_REQUEST when the WatcherThread has done the work and wants to resume | |
920 // SR_WAKEUP_REQUEST can go to | |
921 // * SR_RUNNING when the stopped thread receives the signal | |
922 // * SR_WAKEUP_REQUEST on timeout (resend the signal and try again) | |
923 class SuspendResume { | |
924 public: | |
925 enum State { | |
926 SR_RUNNING, | |
927 SR_SUSPEND_REQUEST, | |
928 SR_SUSPENDED, | |
929 SR_WAKEUP_REQUEST | |
930 }; | |
931 | |
932 private: | |
933 volatile State _state; | |
934 | |
935 private: | |
936 /* try to switch state from state "from" to state "to" | |
937 * returns the state set after the method is complete | |
938 */ | |
939 State switch_state(State from, State to); | |
940 | |
941 public: | |
942 SuspendResume() : _state(SR_RUNNING) { } | |
943 | |
944 State state() const { return _state; } | |
945 | |
946 State request_suspend() { | |
947 return switch_state(SR_RUNNING, SR_SUSPEND_REQUEST); | |
948 } | |
949 | |
950 State cancel_suspend() { | |
951 return switch_state(SR_SUSPEND_REQUEST, SR_RUNNING); | |
952 } | |
953 | |
954 State suspended() { | |
955 return switch_state(SR_SUSPEND_REQUEST, SR_SUSPENDED); | |
956 } | |
957 | |
958 State request_wakeup() { | |
959 return switch_state(SR_SUSPENDED, SR_WAKEUP_REQUEST); | |
960 } | |
961 | |
962 State running() { | |
963 return switch_state(SR_WAKEUP_REQUEST, SR_RUNNING); | |
964 } | |
965 | |
966 bool is_running() const { | |
967 return _state == SR_RUNNING; | |
968 } | |
969 | |
970 bool is_suspend_request() const { | |
971 return _state == SR_SUSPEND_REQUEST; | |
972 } | |
973 | |
974 bool is_suspended() const { | |
975 return _state == SR_SUSPENDED; | |
976 } | |
977 }; | |
978 #endif | |
979 | |
980 | |
0 | 981 protected: |
982 static long _rand_seed; // seed for random number generator | |
983 static int _processor_count; // number of processors | |
984 | |
985 static char* format_boot_path(const char* format_string, | |
986 const char* home, | |
987 int home_len, | |
988 char fileSep, | |
989 char pathSep); | |
990 static bool set_boot_path(char fileSep, char pathSep); | |
691 | 991 static char** split_path(const char* path, int* n); |
11151 | 992 |
0 | 993 }; |
994 | |
995 // Note that "PAUSE" is almost always used with synchronization | |
996 // so arguably we should provide Atomic::SpinPause() instead | |
997 // of the global SpinPause() with C linkage. | |
998 // It'd also be eligible for inlining on many platforms. | |
999 | |
11127 | 1000 extern "C" int SpinPause(); |
1972 | 1001 |
1002 #endif // SHARE_VM_RUNTIME_OS_HPP |