Mercurial > hg > graal-compiler
annotate src/share/vm/runtime/os.hpp @ 20318:fa62fb12cdca
6311046: -Xcheck:jni should support checking of GetPrimitiveArrayCritical.
Summary: Wrapped memory with standard bounds checking "GuardedMemory".
Reviewed-by: zgu, fparain, dcubed
author | dsimms |
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date | Thu, 14 Aug 2014 15:16:07 +0200 |
parents | f73af4455d7d |
children | 52b4284cb496 833b0f92429a |
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; | |
141 | 69 template<class E> class GrowableArray; |
0 | 70 |
71 // %%%%% Moved ThreadState, START_FN, OSThread to new osThread.hpp. -- Rose | |
72 | |
73 // Platform-independent error return values from OS functions | |
74 enum OSReturn { | |
75 OS_OK = 0, // Operation was successful | |
76 OS_ERR = -1, // Operation failed | |
77 OS_INTRPT = -2, // Operation was interrupted | |
78 OS_TIMEOUT = -3, // Operation timed out | |
79 OS_NOMEM = -5, // Operation failed for lack of memory | |
80 OS_NORESOURCE = -6 // Operation failed for lack of nonmemory resource | |
81 }; | |
82 | |
83 enum ThreadPriority { // JLS 20.20.1-3 | |
84 NoPriority = -1, // Initial non-priority value | |
85 MinPriority = 1, // Minimum priority | |
86 NormPriority = 5, // Normal (non-daemon) priority | |
87 NearMaxPriority = 9, // High priority, used for VMThread | |
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88 MaxPriority = 10, // Highest priority, used for WatcherThread |
0 | 89 // ensures that VMThread doesn't starve profiler |
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90 CriticalPriority = 11 // Critical thread priority |
0 | 91 }; |
92 | |
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93 // Executable parameter flag for os::commit_memory() and |
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94 // os::commit_memory_or_exit(). |
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95 const bool ExecMem = true; |
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96 |
0 | 97 // Typedef for structured exception handling support |
98 typedef void (*java_call_t)(JavaValue* value, methodHandle* method, JavaCallArguments* args, Thread* thread); | |
99 | |
100 class os: AllStatic { | |
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101 friend class VMStructs; |
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102 |
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103 public: |
0 | 104 enum { page_sizes_max = 9 }; // Size of _page_sizes array (8 plus a sentinel) |
105 | |
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106 private: |
0 | 107 static OSThread* _starting_thread; |
108 static address _polling_page; | |
109 static volatile int32_t * _mem_serialize_page; | |
110 static uintptr_t _serialize_page_mask; | |
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111 public: |
0 | 112 static size_t _page_sizes[page_sizes_max]; |
113 | |
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114 private: |
0 | 115 static void init_page_sizes(size_t default_page_size) { |
116 _page_sizes[0] = default_page_size; | |
117 _page_sizes[1] = 0; // sentinel | |
118 } | |
119 | |
6197 | 120 static char* pd_reserve_memory(size_t bytes, char* addr = 0, |
121 size_t alignment_hint = 0); | |
122 static char* pd_attempt_reserve_memory_at(size_t bytes, char* addr); | |
123 static void pd_split_reserved_memory(char *base, size_t size, | |
124 size_t split, bool realloc); | |
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125 static bool pd_commit_memory(char* addr, size_t bytes, bool executable); |
6197 | 126 static bool pd_commit_memory(char* addr, size_t size, size_t alignment_hint, |
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127 bool executable); |
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128 // Same as pd_commit_memory() that either succeeds or calls |
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129 // vm_exit_out_of_memory() with the specified mesg. |
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130 static void pd_commit_memory_or_exit(char* addr, size_t bytes, |
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131 bool executable, const char* mesg); |
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132 static void pd_commit_memory_or_exit(char* addr, size_t size, |
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133 size_t alignment_hint, |
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134 bool executable, const char* mesg); |
6197 | 135 static bool pd_uncommit_memory(char* addr, size_t bytes); |
136 static bool pd_release_memory(char* addr, size_t bytes); | |
137 | |
138 static char* pd_map_memory(int fd, const char* file_name, size_t file_offset, | |
139 char *addr, size_t bytes, bool read_only = false, | |
140 bool allow_exec = false); | |
141 static char* pd_remap_memory(int fd, const char* file_name, size_t file_offset, | |
142 char *addr, size_t bytes, bool read_only, | |
143 bool allow_exec); | |
144 static bool pd_unmap_memory(char *addr, size_t bytes); | |
145 static void pd_free_memory(char *addr, size_t bytes, size_t alignment_hint); | |
146 static void pd_realign_memory(char *addr, size_t bytes, size_t alignment_hint); | |
147 | |
148 | |
0 | 149 public: |
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150 static void init(void); // Called before command line parsing |
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151 static void init_before_ergo(void); // Called after command line parsing |
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152 // before VM ergonomics processing. |
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153 static jint init_2(void); // Called after command line parsing |
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154 // and VM ergonomics processing |
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155 static void init_globals(void) { // Called from init_globals() in init.cpp |
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156 init_globals_ext(); |
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157 } |
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158 static void init_3(void); // Called at the end of vm init |
0 | 159 |
160 // File names are case-insensitive on windows only | |
161 // Override me as needed | |
162 static int file_name_strcmp(const char* s1, const char* s2); | |
163 | |
164 static bool getenv(const char* name, char* buffer, int len); | |
165 static bool have_special_privileges(); | |
166 | |
167 static jlong javaTimeMillis(); | |
168 static jlong javaTimeNanos(); | |
169 static void javaTimeNanos_info(jvmtiTimerInfo *info_ptr); | |
170 static void run_periodic_checks(); | |
171 | |
172 | |
173 // Returns the elapsed time in seconds since the vm started. | |
174 static double elapsedTime(); | |
175 | |
176 // Returns real time in seconds since an arbitrary point | |
177 // in the past. | |
178 static bool getTimesSecs(double* process_real_time, | |
179 double* process_user_time, | |
180 double* process_system_time); | |
181 | |
182 // Interface to the performance counter | |
183 static jlong elapsed_counter(); | |
184 static jlong elapsed_frequency(); | |
185 | |
342
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186 // The "virtual time" of a thread is the amount of time a thread has |
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187 // actually run. The first function indicates whether the OS supports |
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188 // this functionality for the current thread, and if so: |
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189 // * the second enables vtime tracking (if that is required). |
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190 // * the third tells whether vtime is enabled. |
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191 // * the fourth returns the elapsed virtual time for the current |
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192 // thread. |
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193 static bool supports_vtime(); |
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194 static bool enable_vtime(); |
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195 static bool vtime_enabled(); |
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196 static double elapsedVTime(); |
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197 |
0 | 198 // Return current local time in a string (YYYY-MM-DD HH:MM:SS). |
199 // It is MT safe, but not async-safe, as reading time zone | |
200 // information may require a lock on some platforms. | |
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201 static char* local_time_string(char *buf, size_t buflen); |
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202 static struct tm* localtime_pd (const time_t* clock, struct tm* res); |
0 | 203 // Fill in buffer with current local time as an ISO-8601 string. |
204 // E.g., YYYY-MM-DDThh:mm:ss.mmm+zzzz. | |
205 // Returns buffer, or NULL if it failed. | |
206 static char* iso8601_time(char* buffer, size_t buffer_length); | |
207 | |
208 // Interface for detecting multiprocessor system | |
209 static inline bool is_MP() { | |
210 assert(_processor_count > 0, "invalid processor count"); | |
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211 return _processor_count > 1 || AssumeMP; |
0 | 212 } |
213 static julong available_memory(); | |
214 static julong physical_memory(); | |
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215 static bool has_allocatable_memory_limit(julong* limit); |
0 | 216 static bool is_server_class_machine(); |
217 | |
218 // number of CPUs | |
219 static int processor_count() { | |
220 return _processor_count; | |
221 } | |
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222 static void set_processor_count(int count) { _processor_count = count; } |
0 | 223 |
224 // Returns the number of CPUs this process is currently allowed to run on. | |
225 // Note that on some OSes this can change dynamically. | |
226 static int active_processor_count(); | |
227 | |
228 // Bind processes to processors. | |
229 // This is a two step procedure: | |
230 // first you generate a distribution of processes to processors, | |
231 // then you bind processes according to that distribution. | |
232 // Compute a distribution for number of processes to processors. | |
233 // Stores the processor id's into the distribution array argument. | |
234 // Returns true if it worked, false if it didn't. | |
235 static bool distribute_processes(uint length, uint* distribution); | |
236 // Binds the current process to a processor. | |
237 // Returns true if it worked, false if it didn't. | |
238 static bool bind_to_processor(uint processor_id); | |
239 | |
4006 | 240 // Give a name to the current thread. |
241 static void set_native_thread_name(const char *name); | |
242 | |
0 | 243 // Interface for stack banging (predetect possible stack overflow for |
244 // exception processing) There are guard pages, and above that shadow | |
245 // pages for stack overflow checking. | |
246 static bool uses_stack_guard_pages(); | |
247 static bool allocate_stack_guard_pages(); | |
248 static void bang_stack_shadow_pages(); | |
249 static bool stack_shadow_pages_available(Thread *thread, methodHandle method); | |
250 | |
251 // OS interface to Virtual Memory | |
252 | |
253 // Return the default page size. | |
254 static int vm_page_size(); | |
255 | |
256 // Return the page size to use for a region of memory. The min_pages argument | |
257 // is a hint intended to limit fragmentation; it says the returned page size | |
258 // should be <= region_max_size / min_pages. Because min_pages is a hint, | |
259 // this routine may return a size larger than region_max_size / min_pages. | |
260 // | |
261 // The current implementation ignores min_pages if a larger page size is an | |
262 // exact multiple of both region_min_size and region_max_size. This allows | |
263 // larger pages to be used when doing so would not cause fragmentation; in | |
264 // particular, a single page can be used when region_min_size == | |
265 // region_max_size == a supported page size. | |
266 static size_t page_size_for_region(size_t region_min_size, | |
267 size_t region_max_size, | |
268 uint min_pages); | |
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269 // Return the largest page size that can be used |
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270 static size_t max_page_size() { |
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271 // The _page_sizes array is sorted in descending order. |
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272 return _page_sizes[0]; |
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273 } |
0 | 274 |
3859 | 275 // Methods for tracing page sizes returned by the above method; enabled by |
0 | 276 // TracePageSizes. The region_{min,max}_size parameters should be the values |
277 // passed to page_size_for_region() and page_size should be the result of that | |
278 // call. The (optional) base and size parameters should come from the | |
279 // ReservedSpace base() and size() methods. | |
3859 | 280 static void trace_page_sizes(const char* str, const size_t* page_sizes, |
281 int count) PRODUCT_RETURN; | |
0 | 282 static void trace_page_sizes(const char* str, const size_t region_min_size, |
283 const size_t region_max_size, | |
284 const size_t page_size, | |
285 const char* base = NULL, | |
286 const size_t size = 0) PRODUCT_RETURN; | |
287 | |
288 static int vm_allocation_granularity(); | |
289 static char* reserve_memory(size_t bytes, char* addr = 0, | |
290 size_t alignment_hint = 0); | |
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291 static char* reserve_memory(size_t bytes, char* addr, |
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292 size_t alignment_hint, MEMFLAGS flags); |
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293 static char* reserve_memory_aligned(size_t size, size_t alignment); |
0 | 294 static char* attempt_reserve_memory_at(size_t bytes, char* addr); |
295 static void split_reserved_memory(char *base, size_t size, | |
296 size_t split, bool realloc); | |
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297 static bool commit_memory(char* addr, size_t bytes, bool executable); |
656 | 298 static bool commit_memory(char* addr, size_t size, size_t alignment_hint, |
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299 bool executable); |
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300 // Same as commit_memory() that either succeeds or calls |
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301 // vm_exit_out_of_memory() with the specified mesg. |
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302 static void commit_memory_or_exit(char* addr, size_t bytes, |
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303 bool executable, const char* mesg); |
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304 static void commit_memory_or_exit(char* addr, size_t size, |
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305 size_t alignment_hint, |
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306 bool executable, const char* mesg); |
0 | 307 static bool uncommit_memory(char* addr, size_t bytes); |
308 static bool release_memory(char* addr, size_t bytes); | |
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309 |
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310 enum ProtType { MEM_PROT_NONE, MEM_PROT_READ, MEM_PROT_RW, MEM_PROT_RWX }; |
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311 static bool protect_memory(char* addr, size_t bytes, ProtType prot, |
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312 bool is_committed = true); |
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313 |
0 | 314 static bool guard_memory(char* addr, size_t bytes); |
315 static bool unguard_memory(char* addr, size_t bytes); | |
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316 static bool create_stack_guard_pages(char* addr, size_t bytes); |
6197 | 317 static bool pd_create_stack_guard_pages(char* addr, size_t bytes); |
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318 static bool remove_stack_guard_pages(char* addr, size_t bytes); |
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319 |
0 | 320 static char* map_memory(int fd, const char* file_name, size_t file_offset, |
321 char *addr, size_t bytes, bool read_only = false, | |
322 bool allow_exec = false); | |
323 static char* remap_memory(int fd, const char* file_name, size_t file_offset, | |
324 char *addr, size_t bytes, bool read_only, | |
325 bool allow_exec); | |
326 static bool unmap_memory(char *addr, size_t bytes); | |
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327 static void free_memory(char *addr, size_t bytes, size_t alignment_hint); |
0 | 328 static void realign_memory(char *addr, size_t bytes, size_t alignment_hint); |
329 | |
330 // NUMA-specific interface | |
141 | 331 static bool numa_has_static_binding(); |
332 static bool numa_has_group_homing(); | |
333 static void numa_make_local(char *addr, size_t bytes, int lgrp_hint); | |
0 | 334 static void numa_make_global(char *addr, size_t bytes); |
335 static size_t numa_get_groups_num(); | |
336 static size_t numa_get_leaf_groups(int *ids, size_t size); | |
337 static bool numa_topology_changed(); | |
338 static int numa_get_group_id(); | |
339 | |
340 // Page manipulation | |
341 struct page_info { | |
342 size_t size; | |
343 int lgrp_id; | |
344 }; | |
345 static bool get_page_info(char *start, page_info* info); | |
346 static char* scan_pages(char *start, char* end, page_info* page_expected, page_info* page_found); | |
347 | |
348 static char* non_memory_address_word(); | |
349 // reserve, commit and pin the entire memory region | |
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350 static char* reserve_memory_special(size_t size, size_t alignment, |
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351 char* addr, bool executable); |
0 | 352 static bool release_memory_special(char* addr, size_t bytes); |
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353 static void large_page_init(); |
0 | 354 static size_t large_page_size(); |
355 static bool can_commit_large_page_memory(); | |
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356 static bool can_execute_large_page_memory(); |
0 | 357 |
358 // OS interface to polling page | |
359 static address get_polling_page() { return _polling_page; } | |
360 static void set_polling_page(address page) { _polling_page = page; } | |
361 static bool is_poll_address(address addr) { return addr >= _polling_page && addr < (_polling_page + os::vm_page_size()); } | |
362 static void make_polling_page_unreadable(); | |
363 static void make_polling_page_readable(); | |
364 | |
365 // Routines used to serialize the thread state without using membars | |
366 static void serialize_thread_states(); | |
367 | |
368 // Since we write to the serialize page from every thread, we | |
369 // want stores to be on unique cache lines whenever possible | |
370 // in order to minimize CPU cross talk. We pre-compute the | |
371 // amount to shift the thread* to make this offset unique to | |
372 // each thread. | |
373 static int get_serialize_page_shift_count() { | |
374 return SerializePageShiftCount; | |
375 } | |
376 | |
377 static void set_serialize_page_mask(uintptr_t mask) { | |
378 _serialize_page_mask = mask; | |
379 } | |
380 | |
381 static unsigned int get_serialize_page_mask() { | |
382 return _serialize_page_mask; | |
383 } | |
384 | |
385 static void set_memory_serialize_page(address page); | |
386 | |
387 static address get_memory_serialize_page() { | |
388 return (address)_mem_serialize_page; | |
389 } | |
390 | |
391 static inline void write_memory_serialize_page(JavaThread *thread) { | |
392 uintptr_t page_offset = ((uintptr_t)thread >> | |
393 get_serialize_page_shift_count()) & | |
394 get_serialize_page_mask(); | |
395 *(volatile int32_t *)((uintptr_t)_mem_serialize_page+page_offset) = 1; | |
396 } | |
397 | |
398 static bool is_memory_serialize_page(JavaThread *thread, address addr) { | |
399 if (UseMembar) return false; | |
1078 | 400 // Previously this function calculated the exact address of this |
401 // thread's serialize page, and checked if the faulting address | |
402 // was equal. However, some platforms mask off faulting addresses | |
403 // to the page size, so now we just check that the address is | |
404 // within the page. This makes the thread argument unnecessary, | |
405 // but we retain the NULL check to preserve existing behaviour. | |
0 | 406 if (thread == NULL) return false; |
1078 | 407 address page = (address) _mem_serialize_page; |
408 return addr >= page && addr < (page + os::vm_page_size()); | |
0 | 409 } |
410 | |
411 static void block_on_serialize_page_trap(); | |
412 | |
413 // threads | |
414 | |
415 enum ThreadType { | |
416 vm_thread, | |
417 cgc_thread, // Concurrent GC thread | |
418 pgc_thread, // Parallel GC thread | |
419 java_thread, | |
420 compiler_thread, | |
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421 watcher_thread, |
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422 os_thread |
0 | 423 }; |
424 | |
425 static bool create_thread(Thread* thread, | |
426 ThreadType thr_type, | |
427 size_t stack_size = 0); | |
428 static bool create_main_thread(JavaThread* thread); | |
429 static bool create_attached_thread(JavaThread* thread); | |
430 static void pd_start_thread(Thread* thread); | |
431 static void start_thread(Thread* thread); | |
432 | |
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433 static void initialize_thread(Thread* thr); |
0 | 434 static void free_thread(OSThread* osthread); |
435 | |
436 // thread id on Linux/64bit is 64bit, on Windows and Solaris, it's 32bit | |
437 static intx current_thread_id(); | |
438 static int current_process_id(); | |
439 static int sleep(Thread* thread, jlong ms, bool interruptable); | |
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440 // Short standalone OS sleep suitable for slow path spin loop. |
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441 // Ignores Thread.interrupt() (so keep it short). |
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442 // ms = 0, will sleep for the least amount of time allowed by the OS. |
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443 static void naked_short_sleep(jlong ms); |
0 | 444 static void infinite_sleep(); // never returns, use with CAUTION |
445 static void yield(); // Yields to all threads with same priority | |
446 enum YieldResult { | |
447 YIELD_SWITCHED = 1, // caller descheduled, other ready threads exist & ran | |
448 YIELD_NONEREADY = 0, // No other runnable/ready threads. | |
449 // platform-specific yield return immediately | |
450 YIELD_UNKNOWN = -1 // Unknown: platform doesn't support _SWITCHED or _NONEREADY | |
451 // YIELD_SWITCHED and YIELD_NONREADY imply the platform supports a "strong" | |
452 // yield that can be used in lieu of blocking. | |
453 } ; | |
454 static YieldResult NakedYield () ; | |
455 static void yield_all(int attempts = 0); // Yields to all other threads including lower priority | |
456 static void loop_breaker(int attempts); // called from within tight loops to possibly influence time-sharing | |
457 static OSReturn set_priority(Thread* thread, ThreadPriority priority); | |
458 static OSReturn get_priority(const Thread* const thread, ThreadPriority& priority); | |
459 | |
460 static void interrupt(Thread* thread); | |
461 static bool is_interrupted(Thread* thread, bool clear_interrupted); | |
462 | |
463 static int pd_self_suspend_thread(Thread* thread); | |
464 | |
465 static ExtendedPC fetch_frame_from_context(void* ucVoid, intptr_t** sp, intptr_t** fp); | |
466 static frame fetch_frame_from_context(void* ucVoid); | |
467 | |
468 static ExtendedPC get_thread_pc(Thread *thread); | |
469 static void breakpoint(); | |
470 | |
471 static address current_stack_pointer(); | |
472 static address current_stack_base(); | |
473 static size_t current_stack_size(); | |
474 | |
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475 static void verify_stack_alignment() PRODUCT_RETURN; |
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476 |
0 | 477 static int message_box(const char* title, const char* message); |
478 static char* do_you_want_to_debug(const char* message); | |
479 | |
480 // run cmd in a separate process and return its exit code; or -1 on failures | |
481 static int fork_and_exec(char *cmd); | |
482 | |
483 // os::exit() is merged with vm_exit() | |
484 // static void exit(int num); | |
485 | |
486 // Terminate the VM, but don't exit the process | |
487 static void shutdown(); | |
488 | |
489 // Terminate with an error. Default is to generate a core file on platforms | |
490 // that support such things. This calls shutdown() and then aborts. | |
491 static void abort(bool dump_core = true); | |
492 | |
493 // Die immediately, no exit hook, no abort hook, no cleanup. | |
494 static void die(); | |
495 | |
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496 // File i/o operations |
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497 static const int default_file_open_flags(); |
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498 static int open(const char *path, int oflag, int mode); |
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499 static FILE* open(int fd, const char* mode); |
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500 static int close(int fd); |
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501 static jlong lseek(int fd, jlong offset, int whence); |
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502 static char* native_path(char *path); |
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503 static int ftruncate(int fd, jlong length); |
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504 static int fsync(int fd); |
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505 static int available(int fd, jlong *bytes); |
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506 |
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507 //File i/o operations |
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508 |
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509 static size_t read(int fd, void *buf, unsigned int nBytes); |
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510 static size_t restartable_read(int fd, void *buf, unsigned int nBytes); |
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511 static size_t write(int fd, const void *buf, unsigned int nBytes); |
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512 |
0 | 513 // Reading directories. |
514 static DIR* opendir(const char* dirname); | |
515 static int readdir_buf_size(const char *path); | |
516 static struct dirent* readdir(DIR* dirp, dirent* dbuf); | |
517 static int closedir(DIR* dirp); | |
518 | |
519 // Dynamic library extension | |
520 static const char* dll_file_extension(); | |
521 | |
522 static const char* get_temp_directory(); | |
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523 static const char* get_current_directory(char *buf, size_t buflen); |
0 | 524 |
242 | 525 // Builds a platform-specific full library path given a ld path and lib name |
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526 // Returns true if buffer contains full path to existing file, false otherwise |
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527 static bool dll_build_name(char* buffer, size_t size, |
242 | 528 const char* pathname, const char* fname); |
529 | |
0 | 530 // Symbol lookup, find nearest function name; basically it implements |
531 // dladdr() for all platforms. Name of the nearest function is copied | |
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532 // to buf. Distance from its base address is optionally returned as offset. |
0 | 533 // If function name is not found, buf[0] is set to '\0' and offset is |
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534 // set to -1 (if offset is non-NULL). |
0 | 535 static bool dll_address_to_function_name(address addr, char* buf, |
536 int buflen, int* offset); | |
537 | |
538 // Locate DLL/DSO. On success, full path of the library is copied to | |
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539 // buf, and offset is optionally set to be the distance between addr |
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540 // and the library's base address. On failure, buf[0] is set to '\0' |
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541 // and offset is set to -1 (if offset is non-NULL). |
0 | 542 static bool dll_address_to_library_name(address addr, char* buf, |
543 int buflen, int* offset); | |
544 | |
545 // Find out whether the pc is in the static code for jvm.dll/libjvm.so. | |
546 static bool address_is_in_vm(address addr); | |
547 | |
548 // Loads .dll/.so and | |
549 // in case of error it checks if .dll/.so was built for the | |
550 // same architecture as Hotspot is running on | |
551 static void* dll_load(const char *name, char *ebuf, int ebuflen); | |
552 | |
242 | 553 // lookup symbol in a shared library |
554 static void* dll_lookup(void* handle, const char* name); | |
555 | |
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556 // Unload library |
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557 static void dll_unload(void *lib); |
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558 |
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559 // Return the handle of this process |
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560 static void* get_default_process_handle(); |
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561 |
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562 // Check for static linked agent library |
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563 static bool find_builtin_agent(AgentLibrary *agent_lib, const char *syms[], |
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564 size_t syms_len); |
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565 |
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566 // Find agent entry point |
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567 static void *find_agent_function(AgentLibrary *agent_lib, bool check_lib, |
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568 const char *syms[], size_t syms_len); |
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569 |
0 | 570 // Print out system information; they are called by fatal error handler. |
571 // Output format may be different on different platforms. | |
572 static void print_os_info(outputStream* st); | |
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573 static void print_os_info_brief(outputStream* st); |
0 | 574 static void print_cpu_info(outputStream* st); |
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575 static void pd_print_cpu_info(outputStream* st); |
0 | 576 static void print_memory_info(outputStream* st); |
577 static void print_dll_info(outputStream* st); | |
578 static void print_environment_variables(outputStream* st, const char** env_list, char* buffer, int len); | |
579 static void print_context(outputStream* st, void* context); | |
1907 | 580 static void print_register_info(outputStream* st, void* context); |
0 | 581 static void print_siginfo(outputStream* st, void* siginfo); |
582 static void print_signal_handlers(outputStream* st, char* buf, size_t buflen); | |
583 static void print_date_and_time(outputStream* st); | |
584 | |
1907 | 585 static void print_location(outputStream* st, intptr_t x, bool verbose = false); |
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586 static size_t lasterror(char *buf, size_t len); |
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587 static int get_last_error(); |
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588 |
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589 // Determines whether the calling process is being debugged by a user-mode debugger. |
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590 static bool is_debugger_attached(); |
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591 |
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592 // wait for a key press if PauseAtExit is set |
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593 static void wait_for_keypress_at_exit(void); |
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594 |
0 | 595 // The following two functions are used by fatal error handler to trace |
596 // native (C) frames. They are not part of frame.hpp/frame.cpp because | |
597 // frame.hpp/cpp assume thread is JavaThread, and also because different | |
598 // OS/compiler may have different convention or provide different API to | |
599 // walk C frames. | |
600 // | |
601 // We don't attempt to become a debugger, so we only follow frames if that | |
602 // does not require a lookup in the unwind table, which is part of the binary | |
603 // file but may be unsafe to read after a fatal error. So on x86, we can | |
604 // only walk stack if %ebp is used as frame pointer; on ia64, it's not | |
605 // possible to walk C stack without having the unwind table. | |
606 static bool is_first_C_frame(frame *fr); | |
607 static frame get_sender_for_C_frame(frame *fr); | |
608 | |
609 // return current frame. pc() and sp() are set to NULL on failure. | |
610 static frame current_frame(); | |
611 | |
612 static void print_hex_dump(outputStream* st, address start, address end, int unitsize); | |
613 | |
614 // returns a string to describe the exception/signal; | |
615 // returns NULL if exception_code is not an OS exception/signal. | |
616 static const char* exception_name(int exception_code, char* buf, size_t buflen); | |
617 | |
618 // Returns native Java library, loads if necessary | |
619 static void* native_java_library(); | |
620 | |
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621 // Fills in path to jvm.dll/libjvm.so (used by the Disassembler) |
0 | 622 static void jvm_path(char *buf, jint buflen); |
623 | |
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624 // Returns true if we are running in a headless jre. |
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625 static bool is_headless_jre(); |
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626 |
0 | 627 // JNI names |
628 static void print_jni_name_prefix_on(outputStream* st, int args_size); | |
629 static void print_jni_name_suffix_on(outputStream* st, int args_size); | |
630 | |
631 // File conventions | |
632 static const char* file_separator(); | |
633 static const char* line_separator(); | |
634 static const char* path_separator(); | |
635 | |
636 // Init os specific system properties values | |
637 static void init_system_properties_values(); | |
638 | |
639 // IO operations, non-JVM_ version. | |
640 static int stat(const char* path, struct stat* sbuf); | |
641 static bool dir_is_empty(const char* path); | |
642 | |
643 // IO operations on binary files | |
644 static int create_binary_file(const char* path, bool rewrite_existing); | |
645 static jlong current_file_offset(int fd); | |
646 static jlong seek_to_file_offset(int fd, jlong offset); | |
647 | |
648 // Thread Local Storage | |
649 static int allocate_thread_local_storage(); | |
650 static void thread_local_storage_at_put(int index, void* value); | |
651 static void* thread_local_storage_at(int index); | |
652 static void free_thread_local_storage(int index); | |
653 | |
6197 | 654 // Stack walk |
655 static address get_caller_pc(int n = 0); | |
656 | |
0 | 657 // General allocation (must be MT-safe) |
6197 | 658 static void* malloc (size_t size, MEMFLAGS flags, address caller_pc = 0); |
659 static void* realloc (void *memblock, size_t size, MEMFLAGS flags, address caller_pc = 0); | |
660 static void free (void *memblock, MEMFLAGS flags = mtNone); | |
0 | 661 static bool check_heap(bool force = false); // verify C heap integrity |
6197 | 662 static char* strdup(const char *, MEMFLAGS flags = mtInternal); // Like strdup |
0 | 663 |
664 #ifndef PRODUCT | |
2250 | 665 static julong num_mallocs; // # of calls to malloc/realloc |
666 static julong alloc_bytes; // # of bytes allocated | |
667 static julong num_frees; // # of calls to free | |
668 static julong free_bytes; // # of bytes freed | |
0 | 669 #endif |
670 | |
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671 // SocketInterface (ex HPI SocketInterface ) |
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672 static int socket(int domain, int type, int protocol); |
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673 static int socket_close(int fd); |
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674 static int socket_shutdown(int fd, int howto); |
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675 static int recv(int fd, char* buf, size_t nBytes, uint flags); |
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676 static int send(int fd, char* buf, size_t nBytes, uint flags); |
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677 static int raw_send(int fd, char* buf, size_t nBytes, uint flags); |
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678 static int timeout(int fd, long timeout); |
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679 static int listen(int fd, int count); |
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680 static int connect(int fd, struct sockaddr* him, socklen_t len); |
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681 static int bind(int fd, struct sockaddr* him, socklen_t len); |
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682 static int accept(int fd, struct sockaddr* him, socklen_t* len); |
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683 static int recvfrom(int fd, char* buf, size_t nbytes, uint flags, |
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684 struct sockaddr* from, socklen_t* fromlen); |
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685 static int get_sock_name(int fd, struct sockaddr* him, socklen_t* len); |
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686 static int sendto(int fd, char* buf, size_t len, uint flags, |
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687 struct sockaddr* to, socklen_t tolen); |
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688 static int socket_available(int fd, jint* pbytes); |
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689 |
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690 static int get_sock_opt(int fd, int level, int optname, |
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691 char* optval, socklen_t* optlen); |
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692 static int set_sock_opt(int fd, int level, int optname, |
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693 const char* optval, socklen_t optlen); |
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694 static int get_host_name(char* name, int namelen); |
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695 |
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696 static struct hostent* get_host_by_name(char* name); |
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697 |
0 | 698 // Support for signals (see JVM_RaiseSignal, JVM_RegisterSignal) |
699 static void signal_init(); | |
700 static void signal_init_pd(); | |
701 static void signal_notify(int signal_number); | |
702 static void* signal(int signal_number, void* handler); | |
703 static void signal_raise(int signal_number); | |
704 static int signal_wait(); | |
705 static int signal_lookup(); | |
706 static void* user_handler(); | |
707 static void terminate_signal_thread(); | |
708 static int sigexitnum_pd(); | |
709 | |
710 // random number generation | |
711 static long random(); // return 32bit pseudorandom number | |
712 static void init_random(long initval); // initialize random sequence | |
713 | |
714 // Structured OS Exception support | |
715 static void os_exception_wrapper(java_call_t f, JavaValue* value, methodHandle* method, JavaCallArguments* args, Thread* thread); | |
716 | |
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717 // On Windows this will create an actual minidump, on Linux/Solaris it will simply check core dump limits |
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718 static void check_or_create_dump(void* exceptionRecord, void* contextRecord, char* buffer, size_t bufferSize); |
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719 |
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720 // Get the default path to the core file |
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721 // Returns the length of the string |
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722 static int get_core_path(char* buffer, size_t bufferSize); |
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723 |
0 | 724 // JVMTI & JVM monitoring and management support |
725 // The thread_cpu_time() and current_thread_cpu_time() are only | |
726 // supported if is_thread_cpu_time_supported() returns true. | |
727 // They are not supported on Solaris T1. | |
728 | |
729 // Thread CPU Time - return the fast estimate on a platform | |
730 // On Solaris - call gethrvtime (fast) - user time only | |
731 // On Linux - fast clock_gettime where available - user+sys | |
732 // - otherwise: very slow /proc fs - user+sys | |
733 // On Windows - GetThreadTimes - user+sys | |
734 static jlong current_thread_cpu_time(); | |
735 static jlong thread_cpu_time(Thread* t); | |
736 | |
737 // Thread CPU Time with user_sys_cpu_time parameter. | |
738 // | |
739 // If user_sys_cpu_time is true, user+sys time is returned. | |
740 // Otherwise, only user time is returned | |
741 static jlong current_thread_cpu_time(bool user_sys_cpu_time); | |
742 static jlong thread_cpu_time(Thread* t, bool user_sys_cpu_time); | |
743 | |
744 // Return a bunch of info about the timers. | |
745 // Note that the returned info for these two functions may be different | |
746 // on some platforms | |
747 static void current_thread_cpu_time_info(jvmtiTimerInfo *info_ptr); | |
748 static void thread_cpu_time_info(jvmtiTimerInfo *info_ptr); | |
749 | |
750 static bool is_thread_cpu_time_supported(); | |
751 | |
752 // System loadavg support. Returns -1 if load average cannot be obtained. | |
753 static int loadavg(double loadavg[], int nelem); | |
754 | |
755 // Hook for os specific jvm options that we don't want to abort on seeing | |
756 static bool obsolete_option(const JavaVMOption *option); | |
757 | |
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758 // Extensions |
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759 #include "runtime/os_ext.hpp" |
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760 |
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761 public: |
11151 | 762 class CrashProtectionCallback : public StackObj { |
763 public: | |
764 virtual void call() = 0; | |
765 }; | |
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766 |
0 | 767 // Platform dependent stuff |
1972 | 768 #ifdef TARGET_OS_FAMILY_linux |
769 # include "os_linux.hpp" | |
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770 # include "os_posix.hpp" |
1972 | 771 #endif |
772 #ifdef TARGET_OS_FAMILY_solaris | |
773 # include "os_solaris.hpp" | |
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774 # include "os_posix.hpp" |
1972 | 775 #endif |
776 #ifdef TARGET_OS_FAMILY_windows | |
777 # include "os_windows.hpp" | |
778 #endif | |
14411 | 779 #ifdef TARGET_OS_FAMILY_aix |
780 # include "os_aix.hpp" | |
781 # include "os_posix.hpp" | |
782 #endif | |
3960 | 783 #ifdef TARGET_OS_FAMILY_bsd |
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784 # include "os_posix.hpp" |
3960 | 785 # include "os_bsd.hpp" |
786 #endif | |
1972 | 787 #ifdef TARGET_OS_ARCH_linux_x86 |
788 # include "os_linux_x86.hpp" | |
789 #endif | |
790 #ifdef TARGET_OS_ARCH_linux_sparc | |
791 # include "os_linux_sparc.hpp" | |
792 #endif | |
793 #ifdef TARGET_OS_ARCH_linux_zero | |
794 # include "os_linux_zero.hpp" | |
795 #endif | |
796 #ifdef TARGET_OS_ARCH_solaris_x86 | |
797 # include "os_solaris_x86.hpp" | |
798 #endif | |
799 #ifdef TARGET_OS_ARCH_solaris_sparc | |
800 # include "os_solaris_sparc.hpp" | |
801 #endif | |
802 #ifdef TARGET_OS_ARCH_windows_x86 | |
803 # include "os_windows_x86.hpp" | |
804 #endif | |
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805 #ifdef TARGET_OS_ARCH_linux_arm |
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806 # include "os_linux_arm.hpp" |
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807 #endif |
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808 #ifdef TARGET_OS_ARCH_linux_ppc |
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809 # include "os_linux_ppc.hpp" |
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810 #endif |
14411 | 811 #ifdef TARGET_OS_ARCH_aix_ppc |
812 # include "os_aix_ppc.hpp" | |
813 #endif | |
3960 | 814 #ifdef TARGET_OS_ARCH_bsd_x86 |
815 # include "os_bsd_x86.hpp" | |
816 #endif | |
817 #ifdef TARGET_OS_ARCH_bsd_zero | |
818 # include "os_bsd_zero.hpp" | |
819 #endif | |
1972 | 820 |
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821 public: |
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822 #ifndef PLATFORM_PRINT_NATIVE_STACK |
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823 // No platform-specific code for printing the native stack. |
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824 static bool platform_print_native_stack(outputStream* st, void* context, |
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825 char *buf, int buf_size) { |
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826 return false; |
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827 } |
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828 #endif |
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829 |
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830 // debugging support (mostly used by debug.cpp but also fatal error handler) |
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831 static bool find(address pc, outputStream* st = tty); // OS specific function to make sense out of an address |
0 | 832 |
833 static bool dont_yield(); // when true, JVM_Yield() is nop | |
834 static void print_statistics(); | |
835 | |
836 // Thread priority helpers (implemented in OS-specific part) | |
837 static OSReturn set_native_priority(Thread* thread, int native_prio); | |
838 static OSReturn get_native_priority(const Thread* const thread, int* priority_ptr); | |
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839 static int java_to_os_priority[CriticalPriority + 1]; |
0 | 840 // Hint to the underlying OS that a task switch would not be good. |
841 // Void return because it's a hint and can fail. | |
842 static void hint_no_preempt(); | |
843 | |
844 // Used at creation if requested by the diagnostic flag PauseAtStartup. | |
845 // Causes the VM to wait until an external stimulus has been applied | |
846 // (for Unix, that stimulus is a signal, for Windows, an external | |
847 // ResumeThread call) | |
848 static void pause(); | |
849 | |
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850 // Builds a platform dependent Agent_OnLoad_<libname> function name |
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851 // which is used to find statically linked in agents. |
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852 static char* build_agent_function_name(const char *sym, const char *cname, |
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853 bool is_absolute_path); |
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854 |
10405 | 855 class SuspendedThreadTaskContext { |
856 public: | |
857 SuspendedThreadTaskContext(Thread* thread, void *ucontext) : _thread(thread), _ucontext(ucontext) {} | |
858 Thread* thread() const { return _thread; } | |
859 void* ucontext() const { return _ucontext; } | |
860 private: | |
861 Thread* _thread; | |
862 void* _ucontext; | |
863 }; | |
864 | |
865 class SuspendedThreadTask { | |
866 public: | |
867 SuspendedThreadTask(Thread* thread) : _thread(thread), _done(false) {} | |
868 virtual ~SuspendedThreadTask() {} | |
869 void run(); | |
870 bool is_done() { return _done; } | |
871 virtual void do_task(const SuspendedThreadTaskContext& context) = 0; | |
872 protected: | |
873 private: | |
874 void internal_do_task(); | |
875 Thread* _thread; | |
876 bool _done; | |
877 }; | |
878 | |
879 #ifndef TARGET_OS_FAMILY_windows | |
880 // Suspend/resume support | |
881 // Protocol: | |
882 // | |
883 // a thread starts in SR_RUNNING | |
884 // | |
885 // SR_RUNNING can go to | |
886 // * SR_SUSPEND_REQUEST when the WatcherThread wants to suspend it | |
887 // SR_SUSPEND_REQUEST can go to | |
888 // * SR_RUNNING if WatcherThread decides it waited for SR_SUSPENDED too long (timeout) | |
889 // * SR_SUSPENDED if the stopped thread receives the signal and switches state | |
890 // SR_SUSPENDED can go to | |
891 // * SR_WAKEUP_REQUEST when the WatcherThread has done the work and wants to resume | |
892 // SR_WAKEUP_REQUEST can go to | |
893 // * SR_RUNNING when the stopped thread receives the signal | |
894 // * SR_WAKEUP_REQUEST on timeout (resend the signal and try again) | |
895 class SuspendResume { | |
896 public: | |
897 enum State { | |
898 SR_RUNNING, | |
899 SR_SUSPEND_REQUEST, | |
900 SR_SUSPENDED, | |
901 SR_WAKEUP_REQUEST | |
902 }; | |
903 | |
904 private: | |
905 volatile State _state; | |
906 | |
907 private: | |
908 /* try to switch state from state "from" to state "to" | |
909 * returns the state set after the method is complete | |
910 */ | |
911 State switch_state(State from, State to); | |
912 | |
913 public: | |
914 SuspendResume() : _state(SR_RUNNING) { } | |
915 | |
916 State state() const { return _state; } | |
917 | |
918 State request_suspend() { | |
919 return switch_state(SR_RUNNING, SR_SUSPEND_REQUEST); | |
920 } | |
921 | |
922 State cancel_suspend() { | |
923 return switch_state(SR_SUSPEND_REQUEST, SR_RUNNING); | |
924 } | |
925 | |
926 State suspended() { | |
927 return switch_state(SR_SUSPEND_REQUEST, SR_SUSPENDED); | |
928 } | |
929 | |
930 State request_wakeup() { | |
931 return switch_state(SR_SUSPENDED, SR_WAKEUP_REQUEST); | |
932 } | |
933 | |
934 State running() { | |
935 return switch_state(SR_WAKEUP_REQUEST, SR_RUNNING); | |
936 } | |
937 | |
938 bool is_running() const { | |
939 return _state == SR_RUNNING; | |
940 } | |
941 | |
942 bool is_suspend_request() const { | |
943 return _state == SR_SUSPEND_REQUEST; | |
944 } | |
945 | |
946 bool is_suspended() const { | |
947 return _state == SR_SUSPENDED; | |
948 } | |
949 }; | |
950 #endif | |
951 | |
952 | |
0 | 953 protected: |
954 static long _rand_seed; // seed for random number generator | |
955 static int _processor_count; // number of processors | |
956 | |
957 static char* format_boot_path(const char* format_string, | |
958 const char* home, | |
959 int home_len, | |
960 char fileSep, | |
961 char pathSep); | |
962 static bool set_boot_path(char fileSep, char pathSep); | |
691 | 963 static char** split_path(const char* path, int* n); |
11151 | 964 |
0 | 965 }; |
966 | |
967 // Note that "PAUSE" is almost always used with synchronization | |
968 // so arguably we should provide Atomic::SpinPause() instead | |
969 // of the global SpinPause() with C linkage. | |
970 // It'd also be eligible for inlining on many platforms. | |
971 | |
11127 | 972 extern "C" int SpinPause(); |
1972 | 973 |
974 #endif // SHARE_VM_RUNTIME_OS_HPP |