Tue, 19 Aug 2014 11:17:36 +0200
8049253: Better GC validation
Summary: Also reviewed by: boris.molodenkov@oracle.com
Reviewed-by: dcubed, minqi, mschoene
Contributed-by: yasuenag@gmail.com, bengt.rutisson@oracle.com
1 /*
2 * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
25 #include "precompiled.hpp"
26 #include "compiler/compileLog.hpp"
27 #include "oops/oop.inline.hpp"
28 #include "runtime/arguments.hpp"
29 #include "utilities/defaultStream.hpp"
30 #include "utilities/ostream.hpp"
31 #include "utilities/top.hpp"
32 #include "utilities/xmlstream.hpp"
33 #ifdef TARGET_OS_FAMILY_linux
34 # include "os_linux.inline.hpp"
35 #endif
36 #ifdef TARGET_OS_FAMILY_solaris
37 # include "os_solaris.inline.hpp"
38 #endif
39 #ifdef TARGET_OS_FAMILY_windows
40 # include "os_windows.inline.hpp"
41 #endif
42 #ifdef TARGET_OS_FAMILY_aix
43 # include "os_aix.inline.hpp"
44 #endif
45 #ifdef TARGET_OS_FAMILY_bsd
46 # include "os_bsd.inline.hpp"
47 #endif
49 extern "C" void jio_print(const char* s); // Declarationtion of jvm method
51 outputStream::outputStream(int width) {
52 _width = width;
53 _position = 0;
54 _newlines = 0;
55 _precount = 0;
56 _indentation = 0;
57 }
59 outputStream::outputStream(int width, bool has_time_stamps) {
60 _width = width;
61 _position = 0;
62 _newlines = 0;
63 _precount = 0;
64 _indentation = 0;
65 if (has_time_stamps) _stamp.update();
66 }
68 void outputStream::update_position(const char* s, size_t len) {
69 for (size_t i = 0; i < len; i++) {
70 char ch = s[i];
71 if (ch == '\n') {
72 _newlines += 1;
73 _precount += _position + 1;
74 _position = 0;
75 } else if (ch == '\t') {
76 int tw = 8 - (_position & 7);
77 _position += tw;
78 _precount -= tw-1; // invariant: _precount + _position == total count
79 } else {
80 _position += 1;
81 }
82 }
83 }
85 // Execute a vsprintf, using the given buffer if necessary.
86 // Return a pointer to the formatted string.
87 const char* outputStream::do_vsnprintf(char* buffer, size_t buflen,
88 const char* format, va_list ap,
89 bool add_cr,
90 size_t& result_len) {
91 const char* result;
92 if (add_cr) buflen--;
93 if (!strchr(format, '%')) {
94 // constant format string
95 result = format;
96 result_len = strlen(result);
97 if (add_cr && result_len >= buflen) result_len = buflen-1; // truncate
98 } else if (format[0] == '%' && format[1] == 's' && format[2] == '\0') {
99 // trivial copy-through format string
100 result = va_arg(ap, const char*);
101 result_len = strlen(result);
102 if (add_cr && result_len >= buflen) result_len = buflen-1; // truncate
103 } else if (vsnprintf(buffer, buflen, format, ap) >= 0) {
104 result = buffer;
105 result_len = strlen(result);
106 } else {
107 DEBUG_ONLY(warning("increase O_BUFLEN in ostream.hpp -- output truncated");)
108 result = buffer;
109 result_len = buflen - 1;
110 buffer[result_len] = 0;
111 }
112 if (add_cr) {
113 if (result != buffer) {
114 strncpy(buffer, result, buflen);
115 result = buffer;
116 }
117 buffer[result_len++] = '\n';
118 buffer[result_len] = 0;
119 }
120 return result;
121 }
123 void outputStream::print(const char* format, ...) {
124 char buffer[O_BUFLEN];
125 va_list ap;
126 va_start(ap, format);
127 size_t len;
128 const char* str = do_vsnprintf(buffer, O_BUFLEN, format, ap, false, len);
129 write(str, len);
130 va_end(ap);
131 }
133 void outputStream::print_cr(const char* format, ...) {
134 char buffer[O_BUFLEN];
135 va_list ap;
136 va_start(ap, format);
137 size_t len;
138 const char* str = do_vsnprintf(buffer, O_BUFLEN, format, ap, true, len);
139 write(str, len);
140 va_end(ap);
141 }
143 void outputStream::vprint(const char *format, va_list argptr) {
144 char buffer[O_BUFLEN];
145 size_t len;
146 const char* str = do_vsnprintf(buffer, O_BUFLEN, format, argptr, false, len);
147 write(str, len);
148 }
150 void outputStream::vprint_cr(const char* format, va_list argptr) {
151 char buffer[O_BUFLEN];
152 size_t len;
153 const char* str = do_vsnprintf(buffer, O_BUFLEN, format, argptr, true, len);
154 write(str, len);
155 }
157 void outputStream::fill_to(int col) {
158 int need_fill = col - position();
159 sp(need_fill);
160 }
162 void outputStream::move_to(int col, int slop, int min_space) {
163 if (position() >= col + slop)
164 cr();
165 int need_fill = col - position();
166 if (need_fill < min_space)
167 need_fill = min_space;
168 sp(need_fill);
169 }
171 void outputStream::put(char ch) {
172 assert(ch != 0, "please fix call site");
173 char buf[] = { ch, '\0' };
174 write(buf, 1);
175 }
177 #define SP_USE_TABS false
179 void outputStream::sp(int count) {
180 if (count < 0) return;
181 if (SP_USE_TABS && count >= 8) {
182 int target = position() + count;
183 while (count >= 8) {
184 this->write("\t", 1);
185 count -= 8;
186 }
187 count = target - position();
188 }
189 while (count > 0) {
190 int nw = (count > 8) ? 8 : count;
191 this->write(" ", nw);
192 count -= nw;
193 }
194 }
196 void outputStream::cr() {
197 this->write("\n", 1);
198 }
200 void outputStream::stamp() {
201 if (! _stamp.is_updated()) {
202 _stamp.update(); // start at 0 on first call to stamp()
203 }
205 // outputStream::stamp() may get called by ostream_abort(), use snprintf
206 // to avoid allocating large stack buffer in print().
207 char buf[40];
208 jio_snprintf(buf, sizeof(buf), "%.3f", _stamp.seconds());
209 print_raw(buf);
210 }
212 void outputStream::stamp(bool guard,
213 const char* prefix,
214 const char* suffix) {
215 if (!guard) {
216 return;
217 }
218 print_raw(prefix);
219 stamp();
220 print_raw(suffix);
221 }
223 void outputStream::date_stamp(bool guard,
224 const char* prefix,
225 const char* suffix) {
226 if (!guard) {
227 return;
228 }
229 print_raw(prefix);
230 static const char error_time[] = "yyyy-mm-ddThh:mm:ss.mmm+zzzz";
231 static const int buffer_length = 32;
232 char buffer[buffer_length];
233 const char* iso8601_result = os::iso8601_time(buffer, buffer_length);
234 if (iso8601_result != NULL) {
235 print_raw(buffer);
236 } else {
237 print_raw(error_time);
238 }
239 print_raw(suffix);
240 return;
241 }
243 outputStream& outputStream::indent() {
244 while (_position < _indentation) sp();
245 return *this;
246 }
248 void outputStream::print_jlong(jlong value) {
249 print(JLONG_FORMAT, value);
250 }
252 void outputStream::print_julong(julong value) {
253 print(JULONG_FORMAT, value);
254 }
256 /**
257 * This prints out hex data in a 'windbg' or 'xxd' form, where each line is:
258 * <hex-address>: 8 * <hex-halfword> <ascii translation (optional)>
259 * example:
260 * 0000000: 7f44 4f46 0102 0102 0000 0000 0000 0000 .DOF............
261 * 0000010: 0000 0000 0000 0040 0000 0020 0000 0005 .......@... ....
262 * 0000020: 0000 0000 0000 0040 0000 0000 0000 015d .......@.......]
263 * ...
264 *
265 * indent is applied to each line. Ends with a CR.
266 */
267 void outputStream::print_data(void* data, size_t len, bool with_ascii) {
268 size_t limit = (len + 16) / 16 * 16;
269 for (size_t i = 0; i < limit; ++i) {
270 if (i % 16 == 0) {
271 indent().print(SIZE_FORMAT_HEX_W(07)":", i);
272 }
273 if (i % 2 == 0) {
274 print(" ");
275 }
276 if (i < len) {
277 print("%02x", ((unsigned char*)data)[i]);
278 } else {
279 print(" ");
280 }
281 if ((i + 1) % 16 == 0) {
282 if (with_ascii) {
283 print(" ");
284 for (size_t j = 0; j < 16; ++j) {
285 size_t idx = i + j - 15;
286 if (idx < len) {
287 char c = ((char*)data)[idx];
288 print("%c", c >= 32 && c <= 126 ? c : '.');
289 }
290 }
291 }
292 cr();
293 }
294 }
295 }
297 stringStream::stringStream(size_t initial_size) : outputStream() {
298 buffer_length = initial_size;
299 buffer = NEW_RESOURCE_ARRAY(char, buffer_length);
300 buffer_pos = 0;
301 buffer_fixed = false;
302 DEBUG_ONLY(rm = Thread::current()->current_resource_mark();)
303 }
305 // useful for output to fixed chunks of memory, such as performance counters
306 stringStream::stringStream(char* fixed_buffer, size_t fixed_buffer_size) : outputStream() {
307 buffer_length = fixed_buffer_size;
308 buffer = fixed_buffer;
309 buffer_pos = 0;
310 buffer_fixed = true;
311 }
313 void stringStream::write(const char* s, size_t len) {
314 size_t write_len = len; // number of non-null bytes to write
315 size_t end = buffer_pos + len + 1; // position after write and final '\0'
316 if (end > buffer_length) {
317 if (buffer_fixed) {
318 // if buffer cannot resize, silently truncate
319 end = buffer_length;
320 write_len = end - buffer_pos - 1; // leave room for the final '\0'
321 } else {
322 // For small overruns, double the buffer. For larger ones,
323 // increase to the requested size.
324 if (end < buffer_length * 2) {
325 end = buffer_length * 2;
326 }
327 char* oldbuf = buffer;
328 assert(rm == NULL || Thread::current()->current_resource_mark() == rm,
329 "stringStream is re-allocated with a different ResourceMark");
330 buffer = NEW_RESOURCE_ARRAY(char, end);
331 strncpy(buffer, oldbuf, buffer_pos);
332 buffer_length = end;
333 }
334 }
335 // invariant: buffer is always null-terminated
336 guarantee(buffer_pos + write_len + 1 <= buffer_length, "stringStream oob");
337 buffer[buffer_pos + write_len] = 0;
338 strncpy(buffer + buffer_pos, s, write_len);
339 buffer_pos += write_len;
341 // Note that the following does not depend on write_len.
342 // This means that position and count get updated
343 // even when overflow occurs.
344 update_position(s, len);
345 }
347 char* stringStream::as_string() {
348 char* copy = NEW_RESOURCE_ARRAY(char, buffer_pos + 1);
349 strncpy(copy, buffer, buffer_pos);
350 copy[buffer_pos] = 0; // terminating null
351 return copy;
352 }
354 stringStream::~stringStream() {}
356 xmlStream* xtty;
357 outputStream* tty;
358 outputStream* gclog_or_tty;
359 extern Mutex* tty_lock;
361 #define EXTRACHARLEN 32
362 #define CURRENTAPPX ".current"
363 // convert YYYY-MM-DD HH:MM:SS to YYYY-MM-DD_HH-MM-SS
364 char* get_datetime_string(char *buf, size_t len) {
365 os::local_time_string(buf, len);
366 int i = (int)strlen(buf);
367 while (i-- >= 0) {
368 if (buf[i] == ' ') buf[i] = '_';
369 else if (buf[i] == ':') buf[i] = '-';
370 }
371 return buf;
372 }
374 static const char* make_log_name_internal(const char* log_name, const char* force_directory,
375 int pid, const char* tms) {
376 const char* basename = log_name;
377 char file_sep = os::file_separator()[0];
378 const char* cp;
379 char pid_text[32];
381 for (cp = log_name; *cp != '\0'; cp++) {
382 if (*cp == '/' || *cp == file_sep) {
383 basename = cp + 1;
384 }
385 }
386 const char* nametail = log_name;
387 // Compute buffer length
388 size_t buffer_length;
389 if (force_directory != NULL) {
390 buffer_length = strlen(force_directory) + strlen(os::file_separator()) +
391 strlen(basename) + 1;
392 } else {
393 buffer_length = strlen(log_name) + 1;
394 }
396 const char* pts = strstr(basename, "%p");
397 int pid_pos = (pts == NULL) ? -1 : (pts - nametail);
399 if (pid_pos >= 0) {
400 jio_snprintf(pid_text, sizeof(pid_text), "pid%u", pid);
401 buffer_length += strlen(pid_text);
402 }
404 pts = strstr(basename, "%t");
405 int tms_pos = (pts == NULL) ? -1 : (pts - nametail);
406 if (tms_pos >= 0) {
407 buffer_length += strlen(tms);
408 }
410 // File name is too long.
411 if (buffer_length > JVM_MAXPATHLEN) {
412 return NULL;
413 }
415 // Create big enough buffer.
416 char *buf = NEW_C_HEAP_ARRAY(char, buffer_length, mtInternal);
418 strcpy(buf, "");
419 if (force_directory != NULL) {
420 strcat(buf, force_directory);
421 strcat(buf, os::file_separator());
422 nametail = basename; // completely skip directory prefix
423 }
425 // who is first, %p or %t?
426 int first = -1, second = -1;
427 const char *p1st = NULL;
428 const char *p2nd = NULL;
430 if (pid_pos >= 0 && tms_pos >= 0) {
431 // contains both %p and %t
432 if (pid_pos < tms_pos) {
433 // case foo%pbar%tmonkey.log
434 first = pid_pos;
435 p1st = pid_text;
436 second = tms_pos;
437 p2nd = tms;
438 } else {
439 // case foo%tbar%pmonkey.log
440 first = tms_pos;
441 p1st = tms;
442 second = pid_pos;
443 p2nd = pid_text;
444 }
445 } else if (pid_pos >= 0) {
446 // contains %p only
447 first = pid_pos;
448 p1st = pid_text;
449 } else if (tms_pos >= 0) {
450 // contains %t only
451 first = tms_pos;
452 p1st = tms;
453 }
455 int buf_pos = (int)strlen(buf);
456 const char* tail = nametail;
458 if (first >= 0) {
459 tail = nametail + first + 2;
460 strncpy(&buf[buf_pos], nametail, first);
461 strcpy(&buf[buf_pos + first], p1st);
462 buf_pos = (int)strlen(buf);
463 if (second >= 0) {
464 strncpy(&buf[buf_pos], tail, second - first - 2);
465 strcpy(&buf[buf_pos + second - first - 2], p2nd);
466 tail = nametail + second + 2;
467 }
468 }
469 strcat(buf, tail); // append rest of name, or all of name
470 return buf;
471 }
473 // log_name comes from -XX:LogFile=log_name or -Xloggc:log_name
474 // in log_name, %p => pid1234 and
475 // %t => YYYY-MM-DD_HH-MM-SS
476 static const char* make_log_name(const char* log_name, const char* force_directory) {
477 char timestr[32];
478 get_datetime_string(timestr, sizeof(timestr));
479 return make_log_name_internal(log_name, force_directory, os::current_process_id(),
480 timestr);
481 }
483 #ifndef PRODUCT
484 void test_loggc_filename() {
485 int pid;
486 char tms[32];
487 char i_result[JVM_MAXPATHLEN];
488 const char* o_result;
489 get_datetime_string(tms, sizeof(tms));
490 pid = os::current_process_id();
492 // test.log
493 jio_snprintf(i_result, JVM_MAXPATHLEN, "test.log", tms);
494 o_result = make_log_name_internal("test.log", NULL, pid, tms);
495 assert(strcmp(i_result, o_result) == 0, "failed on testing make_log_name(\"test.log\", NULL)");
496 FREE_C_HEAP_ARRAY(char, o_result, mtInternal);
498 // test-%t-%p.log
499 jio_snprintf(i_result, JVM_MAXPATHLEN, "test-%s-pid%u.log", tms, pid);
500 o_result = make_log_name_internal("test-%t-%p.log", NULL, pid, tms);
501 assert(strcmp(i_result, o_result) == 0, "failed on testing make_log_name(\"test-%%t-%%p.log\", NULL)");
502 FREE_C_HEAP_ARRAY(char, o_result, mtInternal);
504 // test-%t%p.log
505 jio_snprintf(i_result, JVM_MAXPATHLEN, "test-%spid%u.log", tms, pid);
506 o_result = make_log_name_internal("test-%t%p.log", NULL, pid, tms);
507 assert(strcmp(i_result, o_result) == 0, "failed on testing make_log_name(\"test-%%t%%p.log\", NULL)");
508 FREE_C_HEAP_ARRAY(char, o_result, mtInternal);
510 // %p%t.log
511 jio_snprintf(i_result, JVM_MAXPATHLEN, "pid%u%s.log", pid, tms);
512 o_result = make_log_name_internal("%p%t.log", NULL, pid, tms);
513 assert(strcmp(i_result, o_result) == 0, "failed on testing make_log_name(\"%%p%%t.log\", NULL)");
514 FREE_C_HEAP_ARRAY(char, o_result, mtInternal);
516 // %p-test.log
517 jio_snprintf(i_result, JVM_MAXPATHLEN, "pid%u-test.log", pid);
518 o_result = make_log_name_internal("%p-test.log", NULL, pid, tms);
519 assert(strcmp(i_result, o_result) == 0, "failed on testing make_log_name(\"%%p-test.log\", NULL)");
520 FREE_C_HEAP_ARRAY(char, o_result, mtInternal);
522 // %t.log
523 jio_snprintf(i_result, JVM_MAXPATHLEN, "%s.log", tms);
524 o_result = make_log_name_internal("%t.log", NULL, pid, tms);
525 assert(strcmp(i_result, o_result) == 0, "failed on testing make_log_name(\"%%t.log\", NULL)");
526 FREE_C_HEAP_ARRAY(char, o_result, mtInternal);
528 {
529 // longest filename
530 char longest_name[JVM_MAXPATHLEN];
531 memset(longest_name, 'a', sizeof(longest_name));
532 longest_name[JVM_MAXPATHLEN - 1] = '\0';
533 o_result = make_log_name_internal((const char*)&longest_name, NULL, pid, tms);
534 assert(strcmp(longest_name, o_result) == 0, err_msg("longest name does not match. expected '%s' but got '%s'", longest_name, o_result));
535 FREE_C_HEAP_ARRAY(char, o_result, mtInternal);
536 }
538 {
539 // too long file name
540 char too_long_name[JVM_MAXPATHLEN + 100];
541 int too_long_length = sizeof(too_long_name);
542 memset(too_long_name, 'a', too_long_length);
543 too_long_name[too_long_length - 1] = '\0';
544 o_result = make_log_name_internal((const char*)&too_long_name, NULL, pid, tms);
545 assert(o_result == NULL, err_msg("Too long file name should return NULL, but got '%s'", o_result));
546 }
548 {
549 // too long with timestamp
550 char longest_name[JVM_MAXPATHLEN];
551 memset(longest_name, 'a', JVM_MAXPATHLEN);
552 longest_name[JVM_MAXPATHLEN - 3] = '%';
553 longest_name[JVM_MAXPATHLEN - 2] = 't';
554 longest_name[JVM_MAXPATHLEN - 1] = '\0';
555 o_result = make_log_name_internal((const char*)&longest_name, NULL, pid, tms);
556 assert(o_result == NULL, err_msg("Too long file name after timestamp expansion should return NULL, but got '%s'", o_result));
557 }
559 {
560 // too long with pid
561 char longest_name[JVM_MAXPATHLEN];
562 memset(longest_name, 'a', JVM_MAXPATHLEN);
563 longest_name[JVM_MAXPATHLEN - 3] = '%';
564 longest_name[JVM_MAXPATHLEN - 2] = 'p';
565 longest_name[JVM_MAXPATHLEN - 1] = '\0';
566 o_result = make_log_name_internal((const char*)&longest_name, NULL, pid, tms);
567 assert(o_result == NULL, err_msg("Too long file name after pid expansion should return NULL, but got '%s'", o_result));
568 }
569 }
570 #endif // PRODUCT
572 fileStream::fileStream(const char* file_name) {
573 _file = fopen(file_name, "w");
574 if (_file != NULL) {
575 _need_close = true;
576 } else {
577 warning("Cannot open file %s due to %s\n", file_name, strerror(errno));
578 _need_close = false;
579 }
580 }
582 fileStream::fileStream(const char* file_name, const char* opentype) {
583 _file = fopen(file_name, opentype);
584 if (_file != NULL) {
585 _need_close = true;
586 } else {
587 warning("Cannot open file %s due to %s\n", file_name, strerror(errno));
588 _need_close = false;
589 }
590 }
592 void fileStream::write(const char* s, size_t len) {
593 if (_file != NULL) {
594 // Make an unused local variable to avoid warning from gcc 4.x compiler.
595 size_t count = fwrite(s, 1, len, _file);
596 }
597 update_position(s, len);
598 }
600 long fileStream::fileSize() {
601 long size = -1;
602 if (_file != NULL) {
603 long pos = ::ftell(_file);
604 if (::fseek(_file, 0, SEEK_END) == 0) {
605 size = ::ftell(_file);
606 }
607 ::fseek(_file, pos, SEEK_SET);
608 }
609 return size;
610 }
612 char* fileStream::readln(char *data, int count ) {
613 char * ret = ::fgets(data, count, _file);
614 //Get rid of annoying \n char
615 data[::strlen(data)-1] = '\0';
616 return ret;
617 }
619 fileStream::~fileStream() {
620 if (_file != NULL) {
621 if (_need_close) fclose(_file);
622 _file = NULL;
623 }
624 }
626 void fileStream::flush() {
627 fflush(_file);
628 }
630 fdStream::fdStream(const char* file_name) {
631 _fd = open(file_name, O_WRONLY | O_CREAT | O_TRUNC, 0666);
632 _need_close = true;
633 }
635 fdStream::~fdStream() {
636 if (_fd != -1) {
637 if (_need_close) close(_fd);
638 _fd = -1;
639 }
640 }
642 void fdStream::write(const char* s, size_t len) {
643 if (_fd != -1) {
644 // Make an unused local variable to avoid warning from gcc 4.x compiler.
645 size_t count = ::write(_fd, s, (int)len);
646 }
647 update_position(s, len);
648 }
650 // dump vm version, os version, platform info, build id,
651 // memory usage and command line flags into header
652 void gcLogFileStream::dump_loggc_header() {
653 if (is_open()) {
654 print_cr("%s", Abstract_VM_Version::internal_vm_info_string());
655 os::print_memory_info(this);
656 print("CommandLine flags: ");
657 CommandLineFlags::printSetFlags(this);
658 }
659 }
661 gcLogFileStream::~gcLogFileStream() {
662 if (_file != NULL) {
663 if (_need_close) fclose(_file);
664 _file = NULL;
665 }
666 if (_file_name != NULL) {
667 FREE_C_HEAP_ARRAY(char, _file_name, mtInternal);
668 _file_name = NULL;
669 }
670 }
672 gcLogFileStream::gcLogFileStream(const char* file_name) {
673 _cur_file_num = 0;
674 _bytes_written = 0L;
675 _file_name = make_log_name(file_name, NULL);
677 if (_file_name == NULL) {
678 warning("Cannot open file %s: file name is too long.\n", file_name);
679 _need_close = false;
680 UseGCLogFileRotation = false;
681 return;
682 }
684 // gc log file rotation
685 if (UseGCLogFileRotation && NumberOfGCLogFiles > 1) {
686 char tempbuf[JVM_MAXPATHLEN];
687 jio_snprintf(tempbuf, sizeof(tempbuf), "%s.%d" CURRENTAPPX, _file_name, _cur_file_num);
688 _file = fopen(tempbuf, "w");
689 } else {
690 _file = fopen(_file_name, "w");
691 }
692 if (_file != NULL) {
693 _need_close = true;
694 dump_loggc_header();
695 } else {
696 warning("Cannot open file %s due to %s\n", _file_name, strerror(errno));
697 _need_close = false;
698 }
699 }
701 void gcLogFileStream::write(const char* s, size_t len) {
702 if (_file != NULL) {
703 size_t count = fwrite(s, 1, len, _file);
704 _bytes_written += count;
705 }
706 update_position(s, len);
707 }
709 // rotate_log must be called from VMThread at safepoint. In case need change parameters
710 // for gc log rotation from thread other than VMThread, a sub type of VM_Operation
711 // should be created and be submitted to VMThread's operation queue. DO NOT call this
712 // function directly. Currently, it is safe to rotate log at safepoint through VMThread.
713 // That is, no mutator threads and concurrent GC threads run parallel with VMThread to
714 // write to gc log file at safepoint. If in future, changes made for mutator threads or
715 // concurrent GC threads to run parallel with VMThread at safepoint, write and rotate_log
716 // must be synchronized.
717 void gcLogFileStream::rotate_log(bool force, outputStream* out) {
718 char time_msg[O_BUFLEN];
719 char time_str[EXTRACHARLEN];
720 char current_file_name[JVM_MAXPATHLEN];
721 char renamed_file_name[JVM_MAXPATHLEN];
723 if (!should_rotate(force)) {
724 return;
725 }
727 #ifdef ASSERT
728 Thread *thread = Thread::current();
729 assert(thread == NULL ||
730 (thread->is_VM_thread() && SafepointSynchronize::is_at_safepoint()),
731 "Must be VMThread at safepoint");
732 #endif
733 if (NumberOfGCLogFiles == 1) {
734 // rotate in same file
735 rewind();
736 _bytes_written = 0L;
737 jio_snprintf(time_msg, sizeof(time_msg), "File %s rotated at %s\n",
738 _file_name, os::local_time_string((char *)time_str, sizeof(time_str)));
739 write(time_msg, strlen(time_msg));
741 if (out != NULL) {
742 out->print("%s", time_msg);
743 }
745 dump_loggc_header();
746 return;
747 }
749 #if defined(_WINDOWS)
750 #ifndef F_OK
751 #define F_OK 0
752 #endif
753 #endif // _WINDOWS
755 // rotate file in names extended_filename.0, extended_filename.1, ...,
756 // extended_filename.<NumberOfGCLogFiles - 1>. Current rotation file name will
757 // have a form of extended_filename.<i>.current where i is the current rotation
758 // file number. After it reaches max file size, the file will be saved and renamed
759 // with .current removed from its tail.
760 if (_file != NULL) {
761 jio_snprintf(renamed_file_name, JVM_MAXPATHLEN, "%s.%d",
762 _file_name, _cur_file_num);
763 int result = jio_snprintf(current_file_name, JVM_MAXPATHLEN,
764 "%s.%d" CURRENTAPPX, _file_name, _cur_file_num);
765 if (result >= JVM_MAXPATHLEN) {
766 warning("Cannot create new log file name: %s: file name is too long.\n", current_file_name);
767 return;
768 }
770 const char* msg = force ? "GC log rotation request has been received."
771 : "GC log file has reached the maximum size.";
772 jio_snprintf(time_msg, sizeof(time_msg), "%s %s Saved as %s\n",
773 os::local_time_string((char *)time_str, sizeof(time_str)),
774 msg, renamed_file_name);
775 write(time_msg, strlen(time_msg));
777 if (out != NULL) {
778 out->print("%s", time_msg);
779 }
781 fclose(_file);
782 _file = NULL;
784 bool can_rename = true;
785 if (access(current_file_name, F_OK) != 0) {
786 // current file does not exist?
787 warning("No source file exists, cannot rename\n");
788 can_rename = false;
789 }
790 if (can_rename) {
791 if (access(renamed_file_name, F_OK) == 0) {
792 if (remove(renamed_file_name) != 0) {
793 warning("Could not delete existing file %s\n", renamed_file_name);
794 can_rename = false;
795 }
796 } else {
797 // file does not exist, ok to rename
798 }
799 }
800 if (can_rename && rename(current_file_name, renamed_file_name) != 0) {
801 warning("Could not rename %s to %s\n", _file_name, renamed_file_name);
802 }
803 }
805 _cur_file_num++;
806 if (_cur_file_num > NumberOfGCLogFiles - 1) _cur_file_num = 0;
807 int result = jio_snprintf(current_file_name, JVM_MAXPATHLEN, "%s.%d" CURRENTAPPX,
808 _file_name, _cur_file_num);
809 if (result >= JVM_MAXPATHLEN) {
810 warning("Cannot create new log file name: %s: file name is too long.\n", current_file_name);
811 return;
812 }
814 _file = fopen(current_file_name, "w");
816 if (_file != NULL) {
817 _bytes_written = 0L;
818 _need_close = true;
819 // reuse current_file_name for time_msg
820 jio_snprintf(current_file_name, JVM_MAXPATHLEN,
821 "%s.%d", _file_name, _cur_file_num);
822 jio_snprintf(time_msg, sizeof(time_msg), "%s GC log file created %s\n",
823 os::local_time_string((char *)time_str, sizeof(time_str)), current_file_name);
824 write(time_msg, strlen(time_msg));
826 if (out != NULL) {
827 out->print("%s", time_msg);
828 }
830 dump_loggc_header();
831 // remove the existing file
832 if (access(current_file_name, F_OK) == 0) {
833 if (remove(current_file_name) != 0) {
834 warning("Could not delete existing file %s\n", current_file_name);
835 }
836 }
837 } else {
838 warning("failed to open rotation log file %s due to %s\n"
839 "Turned off GC log file rotation\n",
840 _file_name, strerror(errno));
841 _need_close = false;
842 FLAG_SET_DEFAULT(UseGCLogFileRotation, false);
843 }
844 }
846 defaultStream* defaultStream::instance = NULL;
847 int defaultStream::_output_fd = 1;
848 int defaultStream::_error_fd = 2;
849 FILE* defaultStream::_output_stream = stdout;
850 FILE* defaultStream::_error_stream = stderr;
852 #define LOG_MAJOR_VERSION 160
853 #define LOG_MINOR_VERSION 1
855 void defaultStream::init() {
856 _inited = true;
857 if (LogVMOutput || LogCompilation) {
858 init_log();
859 }
860 }
862 bool defaultStream::has_log_file() {
863 // lazily create log file (at startup, LogVMOutput is false even
864 // if +LogVMOutput is used, because the flags haven't been parsed yet)
865 // For safer printing during fatal error handling, do not init logfile
866 // if a VM error has been reported.
867 if (!_inited && !is_error_reported()) init();
868 return _log_file != NULL;
869 }
871 fileStream* defaultStream::open_file(const char* log_name) {
872 const char* try_name = make_log_name(log_name, NULL);
873 if (try_name == NULL) {
874 warning("Cannot open file %s: file name is too long.\n", log_name);
875 return NULL;
876 }
878 fileStream* file = new(ResourceObj::C_HEAP, mtInternal) fileStream(try_name);
879 FREE_C_HEAP_ARRAY(char, try_name, mtInternal);
880 if (file->is_open()) {
881 return file;
882 }
884 // Try again to open the file in the temp directory.
885 delete file;
886 char warnbuf[O_BUFLEN*2];
887 jio_snprintf(warnbuf, sizeof(warnbuf), "Warning: Cannot open log file: %s\n", log_name);
888 // Note: This feature is for maintainer use only. No need for L10N.
889 jio_print(warnbuf);
890 try_name = make_log_name(log_name, os::get_temp_directory());
891 if (try_name == NULL) {
892 warning("Cannot open file %s: file name is too long for directory %s.\n", log_name, os::get_temp_directory());
893 return NULL;
894 }
896 jio_snprintf(warnbuf, sizeof(warnbuf),
897 "Warning: Forcing option -XX:LogFile=%s\n", try_name);
898 jio_print(warnbuf);
900 file = new(ResourceObj::C_HEAP, mtInternal) fileStream(try_name);
901 FREE_C_HEAP_ARRAY(char, try_name, mtInternal);
902 if (file->is_open()) {
903 return file;
904 }
906 delete file;
907 return NULL;
908 }
910 void defaultStream::init_log() {
911 // %%% Need a MutexLocker?
912 const char* log_name = LogFile != NULL ? LogFile : "hotspot_%p.log";
913 fileStream* file = open_file(log_name);
915 if (file != NULL) {
916 _log_file = file;
917 _outer_xmlStream = new(ResourceObj::C_HEAP, mtInternal) xmlStream(file);
918 start_log();
919 } else {
920 // and leave xtty as NULL
921 LogVMOutput = false;
922 DisplayVMOutput = true;
923 LogCompilation = false;
924 }
925 }
927 void defaultStream::start_log() {
928 xmlStream*xs = _outer_xmlStream;
929 if (this == tty) xtty = xs;
930 // Write XML header.
931 xs->print_cr("<?xml version='1.0' encoding='UTF-8'?>");
932 // (For now, don't bother to issue a DTD for this private format.)
933 jlong time_ms = os::javaTimeMillis() - tty->time_stamp().milliseconds();
934 // %%% Should be: jlong time_ms = os::start_time_milliseconds(), if
935 // we ever get round to introduce that method on the os class
936 xs->head("hotspot_log version='%d %d'"
937 " process='%d' time_ms='"INT64_FORMAT"'",
938 LOG_MAJOR_VERSION, LOG_MINOR_VERSION,
939 os::current_process_id(), (int64_t)time_ms);
940 // Write VM version header immediately.
941 xs->head("vm_version");
942 xs->head("name"); xs->text("%s", VM_Version::vm_name()); xs->cr();
943 xs->tail("name");
944 xs->head("release"); xs->text("%s", VM_Version::vm_release()); xs->cr();
945 xs->tail("release");
946 xs->head("info"); xs->text("%s", VM_Version::internal_vm_info_string()); xs->cr();
947 xs->tail("info");
948 xs->tail("vm_version");
949 // Record information about the command-line invocation.
950 xs->head("vm_arguments"); // Cf. Arguments::print_on()
951 if (Arguments::num_jvm_flags() > 0) {
952 xs->head("flags");
953 Arguments::print_jvm_flags_on(xs->text());
954 xs->tail("flags");
955 }
956 if (Arguments::num_jvm_args() > 0) {
957 xs->head("args");
958 Arguments::print_jvm_args_on(xs->text());
959 xs->tail("args");
960 }
961 if (Arguments::java_command() != NULL) {
962 xs->head("command"); xs->text()->print_cr("%s", Arguments::java_command());
963 xs->tail("command");
964 }
965 if (Arguments::sun_java_launcher() != NULL) {
966 xs->head("launcher"); xs->text()->print_cr("%s", Arguments::sun_java_launcher());
967 xs->tail("launcher");
968 }
969 if (Arguments::system_properties() != NULL) {
970 xs->head("properties");
971 // Print it as a java-style property list.
972 // System properties don't generally contain newlines, so don't bother with unparsing.
973 for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) {
974 xs->text()->print_cr("%s=%s", p->key(), p->value());
975 }
976 xs->tail("properties");
977 }
978 xs->tail("vm_arguments");
979 // tty output per se is grouped under the <tty>...</tty> element.
980 xs->head("tty");
981 // All further non-markup text gets copied to the tty:
982 xs->_text = this; // requires friend declaration!
983 }
985 // finish_log() is called during normal VM shutdown. finish_log_on_error() is
986 // called by ostream_abort() after a fatal error.
987 //
988 void defaultStream::finish_log() {
989 xmlStream* xs = _outer_xmlStream;
990 xs->done("tty");
992 // Other log forks are appended here, at the End of Time:
993 CompileLog::finish_log(xs->out()); // write compile logging, if any, now
995 xs->done("hotspot_log");
996 xs->flush();
998 fileStream* file = _log_file;
999 _log_file = NULL;
1001 delete _outer_xmlStream;
1002 _outer_xmlStream = NULL;
1004 file->flush();
1005 delete file;
1006 }
1008 void defaultStream::finish_log_on_error(char *buf, int buflen) {
1009 xmlStream* xs = _outer_xmlStream;
1011 if (xs && xs->out()) {
1013 xs->done_raw("tty");
1015 // Other log forks are appended here, at the End of Time:
1016 CompileLog::finish_log_on_error(xs->out(), buf, buflen); // write compile logging, if any, now
1018 xs->done_raw("hotspot_log");
1019 xs->flush();
1021 fileStream* file = _log_file;
1022 _log_file = NULL;
1023 _outer_xmlStream = NULL;
1025 if (file) {
1026 file->flush();
1028 // Can't delete or close the file because delete and fclose aren't
1029 // async-safe. We are about to die, so leave it to the kernel.
1030 // delete file;
1031 }
1032 }
1033 }
1035 intx defaultStream::hold(intx writer_id) {
1036 bool has_log = has_log_file(); // check before locking
1037 if (// impossible, but who knows?
1038 writer_id == NO_WRITER ||
1040 // bootstrap problem
1041 tty_lock == NULL ||
1043 // can't grab a lock or call Thread::current() if TLS isn't initialized
1044 ThreadLocalStorage::thread() == NULL ||
1046 // developer hook
1047 !SerializeVMOutput ||
1049 // VM already unhealthy
1050 is_error_reported() ||
1052 // safepoint == global lock (for VM only)
1053 (SafepointSynchronize::is_synchronizing() &&
1054 Thread::current()->is_VM_thread())
1055 ) {
1056 // do not attempt to lock unless we know the thread and the VM is healthy
1057 return NO_WRITER;
1058 }
1059 if (_writer == writer_id) {
1060 // already held, no need to re-grab the lock
1061 return NO_WRITER;
1062 }
1063 tty_lock->lock_without_safepoint_check();
1064 // got the lock
1065 if (writer_id != _last_writer) {
1066 if (has_log) {
1067 _log_file->bol();
1068 // output a hint where this output is coming from:
1069 _log_file->print_cr("<writer thread='" UINTX_FORMAT "'/>", writer_id);
1070 }
1071 _last_writer = writer_id;
1072 }
1073 _writer = writer_id;
1074 return writer_id;
1075 }
1077 void defaultStream::release(intx holder) {
1078 if (holder == NO_WRITER) {
1079 // nothing to release: either a recursive lock, or we scribbled (too bad)
1080 return;
1081 }
1082 if (_writer != holder) {
1083 return; // already unlocked, perhaps via break_tty_lock_for_safepoint
1084 }
1085 _writer = NO_WRITER;
1086 tty_lock->unlock();
1087 }
1090 // Yuck: jio_print does not accept char*/len.
1091 static void call_jio_print(const char* s, size_t len) {
1092 char buffer[O_BUFLEN+100];
1093 if (len > sizeof(buffer)-1) {
1094 warning("increase O_BUFLEN in ostream.cpp -- output truncated");
1095 len = sizeof(buffer)-1;
1096 }
1097 strncpy(buffer, s, len);
1098 buffer[len] = '\0';
1099 jio_print(buffer);
1100 }
1103 void defaultStream::write(const char* s, size_t len) {
1104 intx thread_id = os::current_thread_id();
1105 intx holder = hold(thread_id);
1107 if (DisplayVMOutput &&
1108 (_outer_xmlStream == NULL || !_outer_xmlStream->inside_attrs())) {
1109 // print to output stream. It can be redirected by a vfprintf hook
1110 if (s[len] == '\0') {
1111 jio_print(s);
1112 } else {
1113 call_jio_print(s, len);
1114 }
1115 }
1117 // print to log file
1118 if (has_log_file()) {
1119 int nl0 = _newlines;
1120 xmlTextStream::write(s, len);
1121 // flush the log file too, if there were any newlines
1122 if (nl0 != _newlines){
1123 flush();
1124 }
1125 } else {
1126 update_position(s, len);
1127 }
1129 release(holder);
1130 }
1132 intx ttyLocker::hold_tty() {
1133 if (defaultStream::instance == NULL) return defaultStream::NO_WRITER;
1134 intx thread_id = os::current_thread_id();
1135 return defaultStream::instance->hold(thread_id);
1136 }
1138 void ttyLocker::release_tty(intx holder) {
1139 if (holder == defaultStream::NO_WRITER) return;
1140 defaultStream::instance->release(holder);
1141 }
1143 bool ttyLocker::release_tty_if_locked() {
1144 intx thread_id = os::current_thread_id();
1145 if (defaultStream::instance->writer() == thread_id) {
1146 // release the lock and return true so callers know if was
1147 // previously held.
1148 release_tty(thread_id);
1149 return true;
1150 }
1151 return false;
1152 }
1154 void ttyLocker::break_tty_lock_for_safepoint(intx holder) {
1155 if (defaultStream::instance != NULL &&
1156 defaultStream::instance->writer() == holder) {
1157 if (xtty != NULL) {
1158 xtty->print_cr("<!-- safepoint while printing -->");
1159 }
1160 defaultStream::instance->release(holder);
1161 }
1162 // (else there was no lock to break)
1163 }
1165 void ostream_init() {
1166 if (defaultStream::instance == NULL) {
1167 defaultStream::instance = new(ResourceObj::C_HEAP, mtInternal) defaultStream();
1168 tty = defaultStream::instance;
1170 // We want to ensure that time stamps in GC logs consider time 0
1171 // the time when the JVM is initialized, not the first time we ask
1172 // for a time stamp. So, here, we explicitly update the time stamp
1173 // of tty.
1174 tty->time_stamp().update_to(1);
1175 }
1176 }
1178 void ostream_init_log() {
1179 // For -Xloggc:<file> option - called in runtime/thread.cpp
1180 // Note : this must be called AFTER ostream_init()
1182 gclog_or_tty = tty; // default to tty
1183 if (Arguments::gc_log_filename() != NULL) {
1184 fileStream * gclog = new(ResourceObj::C_HEAP, mtInternal)
1185 gcLogFileStream(Arguments::gc_log_filename());
1186 if (gclog->is_open()) {
1187 // now we update the time stamp of the GC log to be synced up
1188 // with tty.
1189 gclog->time_stamp().update_to(tty->time_stamp().ticks());
1190 }
1191 gclog_or_tty = gclog;
1192 }
1194 // If we haven't lazily initialized the logfile yet, do it now,
1195 // to avoid the possibility of lazy initialization during a VM
1196 // crash, which can affect the stability of the fatal error handler.
1197 defaultStream::instance->has_log_file();
1198 }
1200 // ostream_exit() is called during normal VM exit to finish log files, flush
1201 // output and free resource.
1202 void ostream_exit() {
1203 static bool ostream_exit_called = false;
1204 if (ostream_exit_called) return;
1205 ostream_exit_called = true;
1206 if (gclog_or_tty != tty) {
1207 delete gclog_or_tty;
1208 }
1209 {
1210 // we temporaly disable PrintMallocFree here
1211 // as otherwise it'll lead to using of almost deleted
1212 // tty or defaultStream::instance in logging facility
1213 // of HeapFree(), see 6391258
1214 DEBUG_ONLY(FlagSetting fs(PrintMallocFree, false);)
1215 if (tty != defaultStream::instance) {
1216 delete tty;
1217 }
1218 if (defaultStream::instance != NULL) {
1219 delete defaultStream::instance;
1220 }
1221 }
1222 tty = NULL;
1223 xtty = NULL;
1224 gclog_or_tty = NULL;
1225 defaultStream::instance = NULL;
1226 }
1228 // ostream_abort() is called by os::abort() when VM is about to die.
1229 void ostream_abort() {
1230 // Here we can't delete gclog_or_tty and tty, just flush their output
1231 if (gclog_or_tty) gclog_or_tty->flush();
1232 if (tty) tty->flush();
1234 if (defaultStream::instance != NULL) {
1235 static char buf[4096];
1236 defaultStream::instance->finish_log_on_error(buf, sizeof(buf));
1237 }
1238 }
1240 staticBufferStream::staticBufferStream(char* buffer, size_t buflen,
1241 outputStream *outer_stream) {
1242 _buffer = buffer;
1243 _buflen = buflen;
1244 _outer_stream = outer_stream;
1245 // compile task prints time stamp relative to VM start
1246 _stamp.update_to(1);
1247 }
1249 void staticBufferStream::write(const char* c, size_t len) {
1250 _outer_stream->print_raw(c, (int)len);
1251 }
1253 void staticBufferStream::flush() {
1254 _outer_stream->flush();
1255 }
1257 void staticBufferStream::print(const char* format, ...) {
1258 va_list ap;
1259 va_start(ap, format);
1260 size_t len;
1261 const char* str = do_vsnprintf(_buffer, _buflen, format, ap, false, len);
1262 write(str, len);
1263 va_end(ap);
1264 }
1266 void staticBufferStream::print_cr(const char* format, ...) {
1267 va_list ap;
1268 va_start(ap, format);
1269 size_t len;
1270 const char* str = do_vsnprintf(_buffer, _buflen, format, ap, true, len);
1271 write(str, len);
1272 va_end(ap);
1273 }
1275 void staticBufferStream::vprint(const char *format, va_list argptr) {
1276 size_t len;
1277 const char* str = do_vsnprintf(_buffer, _buflen, format, argptr, false, len);
1278 write(str, len);
1279 }
1281 void staticBufferStream::vprint_cr(const char* format, va_list argptr) {
1282 size_t len;
1283 const char* str = do_vsnprintf(_buffer, _buflen, format, argptr, true, len);
1284 write(str, len);
1285 }
1287 bufferedStream::bufferedStream(size_t initial_size, size_t bufmax) : outputStream() {
1288 buffer_length = initial_size;
1289 buffer = NEW_C_HEAP_ARRAY(char, buffer_length, mtInternal);
1290 buffer_pos = 0;
1291 buffer_fixed = false;
1292 buffer_max = bufmax;
1293 }
1295 bufferedStream::bufferedStream(char* fixed_buffer, size_t fixed_buffer_size, size_t bufmax) : outputStream() {
1296 buffer_length = fixed_buffer_size;
1297 buffer = fixed_buffer;
1298 buffer_pos = 0;
1299 buffer_fixed = true;
1300 buffer_max = bufmax;
1301 }
1303 void bufferedStream::write(const char* s, size_t len) {
1305 if(buffer_pos + len > buffer_max) {
1306 flush();
1307 }
1309 size_t end = buffer_pos + len;
1310 if (end >= buffer_length) {
1311 if (buffer_fixed) {
1312 // if buffer cannot resize, silently truncate
1313 len = buffer_length - buffer_pos - 1;
1314 } else {
1315 // For small overruns, double the buffer. For larger ones,
1316 // increase to the requested size.
1317 if (end < buffer_length * 2) {
1318 end = buffer_length * 2;
1319 }
1320 buffer = REALLOC_C_HEAP_ARRAY(char, buffer, end, mtInternal);
1321 buffer_length = end;
1322 }
1323 }
1324 memcpy(buffer + buffer_pos, s, len);
1325 buffer_pos += len;
1326 update_position(s, len);
1327 }
1329 char* bufferedStream::as_string() {
1330 char* copy = NEW_RESOURCE_ARRAY(char, buffer_pos+1);
1331 strncpy(copy, buffer, buffer_pos);
1332 copy[buffer_pos] = 0; // terminating null
1333 return copy;
1334 }
1336 bufferedStream::~bufferedStream() {
1337 if (!buffer_fixed) {
1338 FREE_C_HEAP_ARRAY(char, buffer, mtInternal);
1339 }
1340 }
1342 #ifndef PRODUCT
1344 #if defined(SOLARIS) || defined(LINUX) || defined(AIX) || defined(_ALLBSD_SOURCE)
1345 #include <sys/types.h>
1346 #include <sys/socket.h>
1347 #include <netinet/in.h>
1348 #include <arpa/inet.h>
1349 #endif
1351 // Network access
1352 networkStream::networkStream() : bufferedStream(1024*10, 1024*10) {
1354 _socket = -1;
1356 int result = os::socket(AF_INET, SOCK_STREAM, 0);
1357 if (result <= 0) {
1358 assert(false, "Socket could not be created!");
1359 } else {
1360 _socket = result;
1361 }
1362 }
1364 int networkStream::read(char *buf, size_t len) {
1365 return os::recv(_socket, buf, (int)len, 0);
1366 }
1368 void networkStream::flush() {
1369 if (size() != 0) {
1370 int result = os::raw_send(_socket, (char *)base(), size(), 0);
1371 assert(result != -1, "connection error");
1372 assert(result == (int)size(), "didn't send enough data");
1373 }
1374 reset();
1375 }
1377 networkStream::~networkStream() {
1378 close();
1379 }
1381 void networkStream::close() {
1382 if (_socket != -1) {
1383 flush();
1384 os::socket_close(_socket);
1385 _socket = -1;
1386 }
1387 }
1389 bool networkStream::connect(const char *ip, short port) {
1391 struct sockaddr_in server;
1392 server.sin_family = AF_INET;
1393 server.sin_port = htons(port);
1395 server.sin_addr.s_addr = inet_addr(ip);
1396 if (server.sin_addr.s_addr == (uint32_t)-1) {
1397 struct hostent* host = os::get_host_by_name((char*)ip);
1398 if (host != NULL) {
1399 memcpy(&server.sin_addr, host->h_addr_list[0], host->h_length);
1400 } else {
1401 return false;
1402 }
1403 }
1406 int result = os::connect(_socket, (struct sockaddr*)&server, sizeof(struct sockaddr_in));
1407 return (result >= 0);
1408 }
1410 #endif