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Quellcode-Bibliothek© Kompilation durch diese Firma[Weder Korrektheit noch Funktionsfähigkeit der Software werden zugesichert.]Datei: Sprache: C |
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/*
* Copyright (c) 1997, 2022, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. * */ #include "precompiled.hpp" #include "cds/classListWriter.hpp" #include "compiler/compileLog.hpp" #include "jvm.h" #include "memory/allocation.inline.hpp" #include "oops/oop.inline.hpp" #include "runtime/arguments.hpp" #include "runtime/orderAccess.hpp" #include "runtime/os.inline.hpp" #include "runtime/safepoint.hpp" #include "runtime/vm_version.hpp" #include "utilities/defaultStream.hpp" #include "utilities/macros.hpp" #include "utilities/ostream.hpp" #include "utilities/vmError.hpp" #include "utilities/xmlstream.hpp" // Declarations of jvm methods extern "C" void jio_print(const char* s, size_t len); extern "C" int jio_printf(const char *fmt, ...); outputStream::outputStream() { _position = 0; _precount = 0; _indentation = 0; _scratch = NULL; _scratch_len = 0; } outputStream::outputStream(bool has_time_stamps) { _position = 0; _precount = 0; _indentation = 0; _scratch = NULL; _scratch_len = 0; if (has_time_stamps) _stamp.update(); } bool outputStream::update_position(const char* s, size_t len) { bool saw_newline = false; for (size_t i = 0; i < len; i++) { char ch = s[i]; if (ch == '\n') { saw_newline = true; _precount += _position + 1; _position = 0; } else if (ch == '\t') { int tw = 8 - (_position & 7); _position += tw; _precount -= tw-1; // invariant: _precount + _position == total count } else { _position += 1; } } return saw_newline; } // Execute a vsprintf, using the given buffer if necessary. // Return a pointer to the formatted string. const char* outputStream::do_vsnprintf(char* buffer, size_t buflen, const char* format, va_list ap, bool add_cr, size_t& result_len) { assert(buflen >= 2, "buffer too small"); const char* result; if (add_cr) buflen--; if (!strchr(format, '%')) { // constant format string result = format; result_len = strlen(result); if (add_cr && result_len >= buflen) result_len = buflen-1; // truncate } else if (format[0] == '%' && format[1] == 's' && format[2] == '\0') { // trivial copy-through format string result = va_arg(ap, const char*); result_len = strlen(result); if (add_cr && result_len >= buflen) result_len = buflen-1; // truncate } else { int required_len = os::vsnprintf(buffer, buflen, format, ap); assert(required_len >= 0, "vsnprintf encoding error"); result = buffer; if ((size_t)required_len < buflen) { result_len = required_len; } else { DEBUG_ONLY(warning("outputStream::do_vsnprintf output truncated -- buffer length add_cr ? (int)buflen + 1 : (int)buflen, add_cr ? required_len + 2 : required_len + 1);) result_len = buflen - 1; } } if (add_cr) { if (result != buffer) { memcpy(buffer, result, result_len); result = buffer; } buffer[result_len++] = '\n'; buffer[result_len] = 0; } return result; } void outputStream::do_vsnprintf_and_write_with_automatic_buffer(const char* format, char buffer[O_BUFLEN]; size_t len; const char* str = do_vsnprintf(buffer, sizeof(buffer), format, ap, add_cr, len); write(str, len); } void outputStream::do_vsnprintf_and_write_with_scratch_buffer(const char* format, va size_t len; const char* str = do_vsnprintf(_scratch, _scratch_len, format, ap, add_cr, len); write(str, len); } void outputStream::do_vsnprintf_and_write(const char* format, va_list ap, bool add_cr) { if (_scratch) { do_vsnprintf_and_write_with_scratch_buffer(format, ap, add_cr); } else { do_vsnprintf_and_write_with_automatic_buffer(format, ap, add_cr); } } void outputStream::print(const char* format, ...) { va_list ap; va_start(ap, format); do_vsnprintf_and_write(format, ap, false); va_end(ap); } void outputStream::print_cr(const char* format, ...) { va_list ap; va_start(ap, format); do_vsnprintf_and_write(format, ap, true); va_end(ap); } void outputStream::vprint(const char *format, va_list argptr) { do_vsnprintf_and_write(format, argptr, false); } void outputStream::vprint_cr(const char* format, va_list argptr) { do_vsnprintf_and_write(format, argptr, true); } void outputStream::fill_to(int col) { int need_fill = col - position(); sp(need_fill); } void outputStream::move_to(int col, int slop, int min_space) { if (position() >= col + slop) cr(); int need_fill = col - position(); if (need_fill < min_space) need_fill = min_space; sp(need_fill); } void outputStream::put(char ch) { assert(ch != 0, "please fix call site"); char buf[] = { ch, '\0' }; write(buf, 1); } #define SP_USE_TABS false void outputStream::sp(int count) { if (count < 0) return; if (SP_USE_TABS && count >= 8) { int target = position() + count; while (count >= 8) { this->write("\t", 1); count -= 8; } count = target - position(); } while (count > 0) { int nw = (count > 8) ? 8 : count; this->write(" ", nw); count -= nw; } } void outputStream::cr() { this->write("\n", 1); } void outputStream::cr_indent() { cr(); indent(); } void outputStream::stamp() { if (! _stamp.is_updated()) { _stamp.update(); // start at 0 on first call to stamp() } // outputStream::stamp() may get called by ostream_abort(), use snprintf // to avoid allocating large stack buffer in print(). char buf[40]; jio_snprintf(buf, sizeof(buf), "%.3f", _stamp.seconds()); print_raw(buf); } void outputStream::stamp(bool guard, const char* prefix, const char* suffix) { if (!guard) { return; } print_raw(prefix); stamp(); print_raw(suffix); } void outputStream::date_stamp(bool guard, const char* prefix, const char* suffix) { if (!guard) { return; } print_raw(prefix); static const char error_time[] = "yyyy-mm-ddThh:mm:ss.mmm+zzzz"; static const int buffer_length = 32; char buffer[buffer_length]; const char* iso8601_result = os::iso8601_time(buffer, buffer_length); if (iso8601_result != NULL) { print_raw(buffer); } else { print_raw(error_time); } print_raw(suffix); return; } outputStream& outputStream::indent() { while (_position < _indentation) sp(); return *this; } void outputStream::print_jlong(jlong value) { print(JLONG_FORMAT, value); } void outputStream::print_julong(julong value) { print(JULONG_FORMAT, value); } /** * This prints out hex data in a 'windbg' or 'xxd' form, where each line is: * <hex-address>: 8 * <hex-halfword> <ascii translation (optional)> * example: * 0000000: 7f44 4f46 0102 0102 0000 0000 0000 0000 .DOF............ * 0000010: 0000 0000 0000 0040 0000 0020 0000 0005 .......@... .... * 0000020: 0000 0000 0000 0040 0000 0000 0000 015d .......@.......] * ... * * indent is applied to each line. Ends with a CR. */ void outputStream::print_data(void* data, size_t len, bool with_ascii, bool rel_addr) { size_t limit = (len + 16) / 16 * 16; for (size_t i = 0; i < limit; ++i) { if (i % 16 == 0) { if (rel_addr) { indent().print("%07" PRIxPTR ":", i); } else { indent().print(PTR_FORMAT ":", p2i((unsigned char*)data + i)); } } if (i % 2 == 0) { print(" "); } if (i < len) { print("%02x", ((unsigned char*)data)[i]); } else { print(" "); } if ((i + 1) % 16 == 0) { if (with_ascii) { print(" "); for (size_t j = 0; j < 16; ++j) { size_t idx = i + j - 15; if (idx < len) { char c = ((char*)data)[idx]; print("%c", c >= 32 && c <= 126 ? c : '.'); } } } cr(); } } } stringStream::stringStream(size_t initial_capacity) : outputStream(), _buffer(_small_buffer), _written(0), _capacity(sizeof(_small_buffer)), _is_fixed(false) { if (initial_capacity > _capacity) { grow(initial_capacity); } zero_terminate(); } // useful for output to fixed chunks of memory, such as performance counters stringStream::stringStream(char* fixed_buffer, size_t fixed_buffer_size) : outputStream(), _buffer(fixed_buffer), _written(0), _capacity(fixed_buffer_size), _is_fixed(true) { zero_terminate(); } // Grow backing buffer to desired capacity. Don't call for fixed buffers void stringStream::grow(size_t new_capacity) { assert(!_is_fixed, "Don't call for caller provided buffers"); assert(new_capacity > _capacity, "Sanity"); assert(new_capacity > sizeof(_small_buffer), "Sanity"); if (_buffer == _small_buffer) { _buffer = NEW_C_HEAP_ARRAY(char, new_capacity, mtInternal); _capacity = new_capacity; if (_written > 0) { ::memcpy(_buffer, _small_buffer, _written); } zero_terminate(); } else { _buffer = REALLOC_C_HEAP_ARRAY(char, _buffer, new_capacity, mtInternal); _capacity = new_capacity; } } void stringStream::write(const char* s, size_t len) { assert(_is_frozen == false, "Modification forbidden"); assert(_capacity >= _written + 1, "Sanity"); if (len == 0) { return; } const size_t reasonable_max_len = 1 * G; if (len >= reasonable_max_len) { assert(false, "bad length? (" SIZE_FORMAT ")", len); return; } size_t write_len = 0; if (_is_fixed) { write_len = MIN2(len, _capacity - _written - 1); } else { write_len = len; size_t needed = _written + len + 1; if (needed > _capacity) { grow(MAX2(needed, _capacity * 2)); } } assert(_written + write_len + 1 <= _capacity, "stringStream oob"); if (write_len > 0) { ::memcpy(_buffer + _written, s, write_len); _written += write_len; zero_terminate(); } // Note that the following does not depend on write_len. // This means that position and count get updated // even when overflow occurs. update_position(s, len); } void stringStream::zero_terminate() { assert(_buffer != NULL && _written < _capacity, "sanity"); _buffer[_written] = '\0'; } void stringStream::reset() { assert(_is_frozen == false, "Modification forbidden"); _written = 0; _precount = 0; _position = 0; zero_terminate(); } char* stringStream::as_string(bool c_heap) const { char* copy = c_heap ? NEW_C_HEAP_ARRAY(char, _written + 1, mtInternal) : NEW_RESOURCE_ARRAY(char, _written + 1) ::memcpy(copy, _buffer, _written); copy[_written] = 0; // terminating null if (c_heap) { // Need to ensure our content is written to memory before we return // the pointer to it. OrderAccess::storestore(); } return copy; } stringStream::~stringStream() { if (!_is_fixed && _buffer != _small_buffer) { FREE_C_HEAP_ARRAY(char, _buffer); } } // tty needs to be always accessible since there are code paths that may write to it // outside of the VM lifespan. // Examples for pre-VM-init accesses: Early NMT init, Early UL init // Examples for post-VM-exit accesses: many, e.g. NMT C-heap bounds checker, signal handling // During lifetime tty is served by an instance of defaultStream. That instance's deletion can // be (easily) postponed or omitted since it has ties to the JVM infrastructure. // The policy followed here is a compromise reached during review of JDK-8292351: // - pre-init: we silently swallow all output. We won't see anything, but at least won't crash // - post-exit: we write to a simple fdStream, but somewhat mimic the behavior of the real defaul static nullStream tty_preinit_stream; outputStream* tty = &tty_preinit_stream; xmlStream* xtty; extern Mutex* tty_lock; #define EXTRACHARLEN 32 #define CURRENTAPPX ".current" // convert YYYY-MM-DD HH:MM:SS to YYYY-MM-DD_HH-MM-SS char* get_datetime_string(char *buf, size_t len) { os::local_time_string(buf, len); int i = (int)strlen(buf); while (--i >= 0) { if (buf[i] == ' ') buf[i] = '_'; else if (buf[i] == ':') buf[i] = '-'; } return buf; } static const char* make_log_name_internal(const char* log_name, const char* force_direct int pid, const char* tms) { const char* basename = log_name; char file_sep = os::file_separator()[0]; const char* cp; char pid_text[32]; for (cp = log_name; *cp != '\0'; cp++) { if (*cp == '/' || *cp == file_sep) { basename = cp + 1; } } const char* nametail = log_name; // Compute buffer length size_t buffer_length; if (force_directory != NULL) { buffer_length = strlen(force_directory) + strlen(os::file_separator()) + strlen(basename) + 1; } else { buffer_length = strlen(log_name) + 1; } const char* pts = strstr(basename, "%p"); int pid_pos = (pts == NULL) ? -1 : (pts - nametail); if (pid_pos >= 0) { jio_snprintf(pid_text, sizeof(pid_text), "pid%u", pid); buffer_length += strlen(pid_text); } pts = strstr(basename, "%t"); int tms_pos = (pts == NULL) ? -1 : (pts - nametail); if (tms_pos >= 0) { buffer_length += strlen(tms); } // File name is too long. if (buffer_length > JVM_MAXPATHLEN) { return NULL; } // Create big enough buffer. char *buf = NEW_C_HEAP_ARRAY(char, buffer_length, mtInternal); strcpy(buf, ""); if (force_directory != NULL) { strcat(buf, force_directory); strcat(buf, os::file_separator()); nametail = basename; // completely skip directory prefix } // who is first, %p or %t? int first = -1, second = -1; const char *p1st = NULL; const char *p2nd = NULL; if (pid_pos >= 0 && tms_pos >= 0) { // contains both %p and %t if (pid_pos < tms_pos) { // case foo%pbar%tmonkey.log first = pid_pos; p1st = pid_text; second = tms_pos; p2nd = tms; } else { // case foo%tbar%pmonkey.log first = tms_pos; p1st = tms; second = pid_pos; p2nd = pid_text; } } else if (pid_pos >= 0) { // contains %p only first = pid_pos; p1st = pid_text; } else if (tms_pos >= 0) { // contains %t only first = tms_pos; p1st = tms; } int buf_pos = (int)strlen(buf); const char* tail = nametail; if (first >= 0) { tail = nametail + first + 2; strncpy(&buf[buf_pos], nametail, first); strcpy(&buf[buf_pos + first], p1st); buf_pos = (int)strlen(buf); if (second >= 0) { strncpy(&buf[buf_pos], tail, second - first - 2); strcpy(&buf[buf_pos + second - first - 2], p2nd); tail = nametail + second + 2; } } strcat(buf, tail); // append rest of name, or all of name return buf; } // log_name comes from -XX:LogFile=log_name or // -XX:DumpLoadedClassList=<file_name> // in log_name, %p => pid1234 and // %t => YYYY-MM-DD_HH-MM-SS const char* make_log_name(const char* log_name, const char* force_directory) { char timestr[32]; get_datetime_string(timestr, sizeof(timestr)); return make_log_name_internal(log_name, force_directory, os::current_process_id(), timestr); } fileStream::fileStream(const char* file_name) { _file = os::fopen(file_name, "w"); if (_file != NULL) { _need_close = true; } else { warning("Cannot open file %s due to %s\n", file_name, os::strerror(errno)); _need_close = false; } } fileStream::fileStream(const char* file_name, const char* opentype) { _file = os::fopen(file_name, opentype); if (_file != NULL) { _need_close = true; } else { warning("Cannot open file %s due to %s\n", file_name, os::strerror(errno)); _need_close = false; } } void fileStream::write(const char* s, size_t len) { if (_file != NULL) { // Make an unused local variable to avoid warning from gcc compiler. size_t count = fwrite(s, 1, len, _file); update_position(s, len); } } long fileStream::fileSize() { long size = -1; if (_file != NULL) { long pos = ::ftell(_file); if (pos < 0) return pos; if (::fseek(_file, 0, SEEK_END) == 0) { size = ::ftell(_file); } ::fseek(_file, pos, SEEK_SET); } return size; } char* fileStream::readln(char *data, int count ) { char * ret = NULL; if (_file != NULL) { ret = ::fgets(data, count, _file); // Get rid of annoying \n char only if it is present. size_t len = ::strlen(data); if (len > 0 && data[len - 1] == '\n') { data[len - 1] = '\0'; } } return ret; } fileStream::~fileStream() { if (_file != NULL) { if (_need_close) fclose(_file); _file = NULL; } } void fileStream::flush() { if (_file != NULL) { fflush(_file); } } fdStream fdStream::_stdout_stream(1); fdStream fdStream::_stderr_stream(2); void fdStream::write(const char* s, size_t len) { if (_fd != -1) { // Make an unused local variable to avoid warning from gcc compiler. ssize_t count = ::write(_fd, s, (int)len); update_position(s, len); } } defaultStream* defaultStream::instance = NULL; int defaultStream::_output_fd = 1; int defaultStream::_error_fd = 2; FILE* defaultStream::_output_stream = stdout; FILE* defaultStream::_error_stream = stderr; #define LOG_MAJOR_VERSION 160 #define LOG_MINOR_VERSION 1 void defaultStream::init() { _inited = true; if (LogVMOutput || LogCompilation) { init_log(); } } bool defaultStream::has_log_file() { // lazily create log file (at startup, LogVMOutput is false even // if +LogVMOutput is used, because the flags haven't been parsed yet) // For safer printing during fatal error handling, do not init logfile // if a VM error has been reported. if (!_inited && !VMError::is_error_reported()) init(); return _log_file != NULL; } fileStream* defaultStream::open_file(const char* log_name) { const char* try_name = make_log_name(log_name, NULL); if (try_name == NULL) { warning("Cannot open file %s: file name is too long.\n", log_name); return NULL; } fileStream* file = new (mtInternal) fileStream(try_name); FREE_C_HEAP_ARRAY(char, try_name); if (file->is_open()) { return file; } // Try again to open the file in the temp directory. delete file; // Note: This feature is for maintainer use only. No need for L10N. jio_printf("Warning: Cannot open log file: %s\n", log_name); try_name = make_log_name(log_name, os::get_temp_directory()); if (try_name == NULL) { warning("Cannot open file %s: file name is too long for directory %s.\n", log_nam return NULL; } jio_printf("Warning: Forcing option -XX:LogFile=%s\n", try_name); file = new (mtInternal) fileStream(try_name); FREE_C_HEAP_ARRAY(char, try_name); if (file->is_open()) { return file; } delete file; return NULL; } void defaultStream::init_log() { // %%% Need a MutexLocker? const char* log_name = LogFile != NULL ? LogFile : "hotspot_%p.log"; fileStream* file = open_file(log_name); if (file != NULL) { _log_file = file; _outer_xmlStream = new(mtInternal) xmlStream(file); start_log(); } else { // and leave xtty as NULL LogVMOutput = false; DisplayVMOutput = true; LogCompilation = false; } } void defaultStream::start_log() { xmlStream*xs = _outer_xmlStream; if (this == tty) xtty = xs; // Write XML header. xs->print_cr(""); // (For now, don't bother to issue a DTD for this private format.) // Calculate the start time of the log as ms since the epoch: this is // the current time in ms minus the uptime in ms. jlong time_ms = os::javaTimeMillis() - tty->time_stamp().milliseconds(); xs->head("hotspot_log version='%d %d'" " process='%d' time_ms='" INT64_FORMAT "'", LOG_MAJOR_VERSION, LOG_MINOR_VERSION, os::current_process_id(), (int64_t)time_ms); // Write VM version header immediately. xs->head("vm_version"); xs->head("name"); xs->text("%s", VM_Version::vm_name()); xs->cr(); xs->tail("name"); xs->head("release"); xs->text("%s", VM_Version::vm_release()); xs->cr(); xs->tail("release"); xs->head("info"); xs->text("%s", VM_Version::internal_vm_info_string()); xs->cr(); xs->tail("info"); xs->tail("vm_version"); // Record information about the command-line invocation. xs->head("vm_arguments"); // Cf. Arguments::print_on() if (Arguments::num_jvm_flags() > 0) { xs->head("flags"); Arguments::print_jvm_flags_on(xs->text()); xs->tail("flags"); } if (Arguments::num_jvm_args() > 0) { xs->head("args"); Arguments::print_jvm_args_on(xs->text()); xs->tail("args"); } if (Arguments::java_command() != NULL) { xs->head("command"); xs->text()->print_cr("%s", Arguments::java_command()); xs->tail("command"); } if (Arguments::sun_java_launcher() != NULL) { xs->head("launcher"); xs->text()->print_cr("%s", Arguments::sun_java_launcher()); xs->tail("launcher"); } if (Arguments::system_properties() != NULL) { xs->head("properties"); // Print it as a java-style property list. // System properties don't generally contain newlines, so don't bother with unparsing. outputStream *text = xs->text(); for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) { assert(p->key() != NULL, "p->key() is NULL"); if (p->readable()) { // Print in two stages to avoid problems with long // keys/values. text->print_raw(p->key()); text->put('='); assert(p->value() != NULL, "p->value() is NULL"); text->print_raw_cr(p->value()); } } xs->tail("properties"); } xs->tail("vm_arguments"); // tty output per se is grouped under the <tty>...</tty> element. xs->head("tty"); // All further non-markup text gets copied to the tty: xs->_text = this; // requires friend declaration! } // finish_log() is called during normal VM shutdown. finish_log_on_error() is // called by ostream_abort() after a fatal error. // void defaultStream::finish_log() { xmlStream* xs = _outer_xmlStream; xs->done("tty"); // Other log forks are appended here, at the End of Time: CompileLog::finish_log(xs->out()); // write compile logging, if any, now xs->done("hotspot_log"); xs->flush(); fileStream* file = _log_file; _log_file = NULL; delete _outer_xmlStream; _outer_xmlStream = NULL; file->flush(); delete file; } void defaultStream::finish_log_on_error(char *buf, int buflen) { xmlStream* xs = _outer_xmlStream; if (xs && xs->out()) { xs->done_raw("tty"); // Other log forks are appended here, at the End of Time: CompileLog::finish_log_on_error(xs->out(), buf, buflen); // write compile logging, if any xs->done_raw("hotspot_log"); xs->flush(); fileStream* file = _log_file; _log_file = NULL; _outer_xmlStream = NULL; if (file) { file->flush(); // Can't delete or close the file because delete and fclose aren't // async-safe. We are about to die, so leave it to the kernel. // delete file; } } } intx defaultStream::hold(intx writer_id) { bool has_log = has_log_file(); // check before locking if (// impossible, but who knows? writer_id == NO_WRITER || // bootstrap problem tty_lock == NULL || // can't grab a lock if current Thread isn't set Thread::current_or_null() == NULL || // developer hook !SerializeVMOutput || // VM already unhealthy VMError::is_error_reported() || // safepoint == global lock (for VM only) (SafepointSynchronize::is_synchronizing() && Thread::current()->is_VM_thread()) ) { // do not attempt to lock unless we know the thread and the VM is healthy return NO_WRITER; } if (_writer == writer_id) { // already held, no need to re-grab the lock return NO_WRITER; } tty_lock->lock_without_safepoint_check(); // got the lock if (writer_id != _last_writer) { if (has_log) { _log_file->bol(); // output a hint where this output is coming from: _log_file->print_cr(" } _last_writer = writer_id; } _writer = writer_id; return writer_id; } void defaultStream::release(intx holder) { if (holder == NO_WRITER) { // nothing to release: either a recursive lock, or we scribbled (too bad) return; } if (_writer != holder) { return; // already unlocked, perhaps via break_tty_lock_for_safepoint } _writer = NO_WRITER; tty_lock->unlock(); } void defaultStream::write(const char* s, size_t len) { intx thread_id = os::current_thread_id(); intx holder = hold(thread_id); if (DisplayVMOutput && (_outer_xmlStream == nullptr || !_outer_xmlStream->inside_attrs())) { // print to output stream. It can be redirected by a vfprintf hook jio_print(s, len); } // print to log file if (has_log_file() && _outer_xmlStream != nullptr) { _outer_xmlStream->write_text(s, len); bool nl = update_position(s, len); // flush the log file too, if there were any newlines if (nl) { flush(); } } else { update_position(s, len); } release(holder); } intx ttyLocker::hold_tty() { if (defaultStream::instance == NULL) return defaultStream::NO_WRITER; intx thread_id = os::current_thread_id(); return defaultStream::instance->hold(thread_id); } void ttyLocker::release_tty(intx holder) { if (holder == defaultStream::NO_WRITER) return; defaultStream::instance->release(holder); } bool ttyLocker::release_tty_if_locked() { intx thread_id = os::current_thread_id(); if (defaultStream::instance->writer() == thread_id) { // release the lock and return true so callers know if was // previously held. release_tty(thread_id); return true; } return false; } void ttyLocker::break_tty_lock_for_safepoint(intx holder) { if (defaultStream::instance != NULL && defaultStream::instance->writer() == holder) { if (xtty != NULL) { xtty->print_cr(""); } defaultStream::instance->release(holder); } // (else there was no lock to break) } void ostream_init() { if (defaultStream::instance == NULL) { defaultStream::instance = new(mtInternal) defaultStream(); tty = defaultStream::instance; // We want to ensure that time stamps in GC logs consider time 0 // the time when the JVM is initialized, not the first time we ask // for a time stamp. So, here, we explicitly update the time stamp // of tty. tty->time_stamp().update_to(1); } } void ostream_init_log() { // Note : this must be called AFTER ostream_init() ClassListWriter::init(); // If we haven't lazily initialized the logfile yet, do it now, // to avoid the possibility of lazy initialization during a VM // crash, which can affect the stability of the fatal error handler. defaultStream::instance->has_log_file(); } // ostream_exit() is called during normal VM exit to finish log files, flush // output and free resource. void ostream_exit() { static bool ostream_exit_called = false; if (ostream_exit_called) return; ostream_exit_called = true; ClassListWriter::delete_classlist(); // Make sure tty works after VM exit by assigning an always-on functioning fdStream. outputStream* tmp = tty; tty = DisplayVMOutputToStderr ? fdStream::stdout_stream() : fdStream::stderr_stream(); if (tmp != &tty_preinit_stream && tmp != defaultStream::instance) { delete tmp; } delete defaultStream::instance; xtty = NULL; defaultStream::instance = NULL; } // ostream_abort() is called by os::abort() when VM is about to die. void ostream_abort() { // Here we can't delete tty, just flush its output if (tty) tty->flush(); if (defaultStream::instance != NULL) { static char buf[4096]; defaultStream::instance->finish_log_on_error(buf, sizeof(buf)); } } bufferedStream::bufferedStream(size_t initial_size, size_t bufmax) : outputStream() { buffer_length = initial_size; buffer = NEW_C_HEAP_ARRAY(char, buffer_length, mtInternal); buffer_pos = 0; buffer_fixed = false; buffer_max = bufmax; truncated = false; } bufferedStream::bufferedStream(char* fixed_buffer, size_t fixed_buffer_size, size_t b buffer_length = fixed_buffer_size; buffer = fixed_buffer; buffer_pos = 0; buffer_fixed = true; buffer_max = bufmax; truncated = false; } void bufferedStream::write(const char* s, size_t len) { if (truncated) { return; } if(buffer_pos + len > buffer_max) { flush(); // Note: may be a noop. } size_t end = buffer_pos + len; if (end >= buffer_length) { if (buffer_fixed) { // if buffer cannot resize, silently truncate len = buffer_length - buffer_pos - 1; truncated = true; } else { // For small overruns, double the buffer. For larger ones, // increase to the requested size. if (end < buffer_length * 2) { end = buffer_length * 2; } // Impose a cap beyond which the buffer cannot grow - a size which // in all probability indicates a real error, e.g. faulty printing // code looping, while not affecting cases of just-very-large-but-its-normal // output. const size_t reasonable_cap = MAX2(100 * M, buffer_max * 2); if (end > reasonable_cap) { // In debug VM, assert right away. assert(false, "Exceeded max buffer size for this string."); // Release VM: silently truncate. We do this since these kind of errors // are both difficult to predict with testing (depending on logging content) // and usually not serious enough to kill a production VM for it. end = reasonable_cap; size_t remaining = end - buffer_pos; if (len >= remaining) { len = remaining - 1; truncated = true; } } if (buffer_length < end) { buffer = REALLOC_C_HEAP_ARRAY(char, buffer, end, mtInternal); buffer_length = end; } } } if (len > 0) { memcpy(buffer + buffer_pos, s, len); buffer_pos += len; update_position(s, len); } } char* bufferedStream::as_string() { char* copy = NEW_RESOURCE_ARRAY(char, buffer_pos+1); strncpy(copy, buffer, buffer_pos); copy[buffer_pos] = 0; // terminating null return copy; } bufferedStream::~bufferedStream() { if (!buffer_fixed) { FREE_C_HEAP_ARRAY(char, buffer); } } #ifndef PRODUCT #if defined(LINUX) || defined(AIX) || defined(_ALLBSD_SOURCE) #include <sys/types.h> #include <sys/socket.h> #include <netinet/in.h> #include <netdb.h> #include <arpa/inet.h> #elif defined(_WINDOWS) #include <winsock2.h> #endif // Network access networkStream::networkStream() : bufferedStream(1024*10, 1024*10) { _socket = -1; int result = ::socket(AF_INET, SOCK_STREAM, 0); if (result <= 0) { assert(false, "Socket could not be created!"); } else { _socket = result; } } int networkStream::read(char *buf, size_t len) { return os::recv(_socket, buf, (int)len, 0); } void networkStream::flush() { if (size() != 0) { int result = os::raw_send(_socket, (char *)base(), size(), 0); assert(result != -1, "connection error"); assert(result == (int)size(), "didn't send enough data"); } reset(); } networkStream::~networkStream() { close(); } void networkStream::close() { if (_socket != -1) { flush(); os::socket_close(_socket); _socket = -1; } } bool networkStream::connect(const char *ip, short port) { struct sockaddr_in server; server.sin_family = AF_INET; server.sin_port = htons(port); server.sin_addr.s_addr = inet_addr(ip); if (server.sin_addr.s_addr == (uint32_t)-1) { struct hostent* host = os::get_host_by_name((char*)ip); if (host != NULL) { memcpy(&server.sin_addr, host->h_addr_list[0], host->h_length); } else { return false; } } int result = os::connect(_socket, (struct sockaddr*)&server, sizeof(struct sockaddr_in)); return (result >= 0); } #endif ¤ Diese beiden folgenden Angebotsgruppen bietet das Unternehmen0.74Angebot Wie Sie bei der Firma Beratungs- und Dienstleistungen beauftragen können ¤ |
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