author | mlarsson |
Mon, 11 Apr 2016 12:22:09 +0200 | |
changeset 37465 | 1d5551f466ee |
parent 37242 | 91e5f98fff6f |
child 37994 | 1a816b464178 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2015, 2016, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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* |
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*/ |
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#include "precompiled.hpp" |
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#include "logging/log.hpp" |
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#include "logging/logConfiguration.hpp" |
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#include "logging/logDecorations.hpp" |
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#include "logging/logDecorators.hpp" |
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#include "logging/logDiagnosticCommand.hpp" |
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#include "logging/logFileOutput.hpp" |
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#include "logging/logOutput.hpp" |
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#include "logging/logTagLevelExpression.hpp" |
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#include "logging/logTagSet.hpp" |
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#include "memory/allocation.inline.hpp" |
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#include "memory/resourceArea.hpp" |
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#include "runtime/os.inline.hpp" |
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#include "runtime/semaphore.hpp" |
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#include "utilities/globalDefinitions.hpp" |
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LogOutput** LogConfiguration::_outputs = NULL; |
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size_t LogConfiguration::_n_outputs = 0; |
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LogConfiguration::UpdateListenerFunction* LogConfiguration::_listener_callbacks = NULL; |
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size_t LogConfiguration::_n_listener_callbacks = 0; |
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// Stack object to take the lock for configuring the logging. |
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// Should only be held during the critical parts of the configuration |
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// (when calling configure_output or reading/modifying the outputs array). |
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// Thread must never block when holding this lock. |
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class ConfigurationLock : public StackObj { |
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private: |
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// Semaphore used as lock |
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static Semaphore _semaphore; |
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debug_only(static intx _locking_thread_id;) |
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public: |
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ConfigurationLock() { |
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_semaphore.wait(); |
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debug_only(_locking_thread_id = os::current_thread_id()); |
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} |
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~ConfigurationLock() { |
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debug_only(_locking_thread_id = -1); |
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_semaphore.signal(); |
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} |
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debug_only(static bool current_thread_has_lock();) |
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}; |
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Semaphore ConfigurationLock::_semaphore(1); |
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#ifdef ASSERT |
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intx ConfigurationLock::_locking_thread_id = -1; |
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bool ConfigurationLock::current_thread_has_lock() { |
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return _locking_thread_id == os::current_thread_id(); |
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} |
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#endif |
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void LogConfiguration::post_initialize() { |
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LogDiagnosticCommand::registerCommand(); |
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Log(logging) log; |
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log.info("Log configuration fully initialized."); |
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log_develop_info(logging)("Develop logging is available."); |
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if (log.is_trace()) { |
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ResourceMark rm; |
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describe(log.trace_stream()); |
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} |
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} |
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void LogConfiguration::initialize(jlong vm_start_time) { |
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LogFileOutput::set_file_name_parameters(vm_start_time); |
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LogDecorations::initialize(vm_start_time); |
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assert(_outputs == NULL, "Should not initialize _outputs before this function, initialize called twice?"); |
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_outputs = NEW_C_HEAP_ARRAY(LogOutput*, 2, mtLogging); |
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_outputs[0] = LogOutput::Stdout; |
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_outputs[1] = LogOutput::Stderr; |
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_n_outputs = 2; |
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} |
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void LogConfiguration::finalize() { |
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for (size_t i = 2; i < _n_outputs; i++) { |
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delete _outputs[i]; |
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} |
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FREE_C_HEAP_ARRAY(LogOutput*, _outputs); |
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} |
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size_t LogConfiguration::find_output(const char* name) { |
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for (size_t i = 0; i < _n_outputs; i++) { |
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if (strcmp(_outputs[i]->name(), name) == 0) { |
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return i; |
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} |
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} |
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return SIZE_MAX; |
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} |
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LogOutput* LogConfiguration::new_output(char* name, const char* options, outputStream* errstream) { |
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const char* type; |
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char* equals_pos = strchr(name, '='); |
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if (equals_pos == NULL) { |
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type = "file"; |
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} else { |
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*equals_pos = '\0'; |
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type = name; |
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name = equals_pos + 1; |
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} |
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// Check if name is quoted, and if so, strip the quotes |
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char* quote = strchr(name, '"'); |
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if (quote != NULL) { |
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char* end_quote = strchr(name + 1, '"'); |
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if (end_quote == NULL) { |
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errstream->print_cr("Output name has opening quote but is missing a terminating quote."); |
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return NULL; |
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} else if (quote != name || end_quote[1] != '\0') { |
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errstream->print_cr("Output name can not be partially quoted." |
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" Either surround the whole name with quotation marks," |
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" or do not use quotation marks at all."); |
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return NULL; |
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} |
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name++; |
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*end_quote = '\0'; |
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} |
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LogOutput* output; |
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if (strcmp(type, "file") == 0) { |
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output = new LogFileOutput(name); |
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} else { |
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errstream->print_cr("Unsupported log output type."); |
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return NULL; |
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} |
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bool success = output->initialize(options, errstream); |
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if (!success) { |
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errstream->print_cr("Initialization of output '%s' using options '%s' failed.", name, options); |
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delete output; |
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return NULL; |
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} |
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return output; |
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} |
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size_t LogConfiguration::add_output(LogOutput* output) { |
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size_t idx = _n_outputs++; |
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_outputs = REALLOC_C_HEAP_ARRAY(LogOutput*, _outputs, _n_outputs, mtLogging); |
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_outputs[idx] = output; |
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return idx; |
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} |
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void LogConfiguration::delete_output(size_t idx) { |
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assert(idx > 1 && idx < _n_outputs, |
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"idx must be in range 1 < idx < _n_outputs, but idx = " SIZE_FORMAT |
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" and _n_outputs = " SIZE_FORMAT, idx, _n_outputs); |
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LogOutput* output = _outputs[idx]; |
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// Swap places with the last output and shrink the array |
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_outputs[idx] = _outputs[--_n_outputs]; |
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_outputs = REALLOC_C_HEAP_ARRAY(LogOutput*, _outputs, _n_outputs, mtLogging); |
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delete output; |
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} |
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void LogConfiguration::configure_output(size_t idx, const LogTagLevelExpression& tag_level_expression, const LogDecorators& decorators) { |
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assert(ConfigurationLock::current_thread_has_lock(), "Must hold configuration lock to call this function."); |
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assert(idx < _n_outputs, "Invalid index, idx = " SIZE_FORMAT " and _n_outputs = " SIZE_FORMAT, idx, _n_outputs); |
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LogOutput* output = _outputs[idx]; |
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// Clear the previous config description |
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output->clear_config_string(); |
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bool enabled = false; |
184 |
for (LogTagSet* ts = LogTagSet::first(); ts != NULL; ts = ts->next()) { |
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LogLevelType level = tag_level_expression.level_for(*ts); |
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// Ignore tagsets that do not, and will not log on the output |
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if (!ts->has_output(output) && (level == LogLevel::NotMentioned || level == LogLevel::Off)) { |
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continue; |
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} |
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// Update decorators before adding/updating output level, |
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// so that the tagset will have the necessary decorators when requiring them. |
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if (level != LogLevel::Off) { |
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ts->update_decorators(decorators); |
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} |
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// Set the new level, if it changed |
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if (level != LogLevel::NotMentioned) { |
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ts->set_output_level(output, level); |
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} |
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|
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if (level != LogLevel::Off) { |
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// Keep track of whether or not the output is ever used by some tagset |
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enabled = true; |
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|
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if (level == LogLevel::NotMentioned) { |
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208 |
// Look up the previously set level for this output on this tagset |
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209 |
level = ts->level_for(output); |
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210 |
} |
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211 |
|
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212 |
// Update the config description with this tagset and level |
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213 |
output->add_to_config_string(ts, level); |
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214 |
} |
33097 | 215 |
} |
216 |
||
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217 |
// It is now safe to set the new decorators for the actual output |
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218 |
output->set_decorators(decorators); |
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219 |
|
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220 |
// Update the decorators on all tagsets to get rid of unused decorators |
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221 |
for (LogTagSet* ts = LogTagSet::first(); ts != NULL; ts = ts->next()) { |
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|
222 |
ts->update_decorators(); |
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223 |
} |
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|
224 |
|
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|
225 |
if (enabled) { |
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|
226 |
assert(strlen(output->config_string()) > 0, |
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|
227 |
"Should always have a config description if the output is enabled."); |
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|
228 |
} else if (idx > 1) { |
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|
229 |
// Output is unused and should be removed. |
33097 | 230 |
delete_output(idx); |
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|
231 |
} else { |
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232 |
// Output is either stdout or stderr, which means we can't remove it. |
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233 |
// Update the config description to reflect that the output is disabled. |
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|
234 |
output->set_config_string("all=off"); |
33097 | 235 |
} |
236 |
} |
|
237 |
||
238 |
void LogConfiguration::disable_output(size_t idx) { |
|
239 |
LogOutput* out = _outputs[idx]; |
|
240 |
||
241 |
// Remove the output from all tagsets. |
|
242 |
for (LogTagSet* ts = LogTagSet::first(); ts != NULL; ts = ts->next()) { |
|
243 |
ts->set_output_level(out, LogLevel::Off); |
|
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|
244 |
ts->update_decorators(); |
33097 | 245 |
} |
246 |
||
247 |
// Delete the output unless stdout/stderr |
|
248 |
if (out != LogOutput::Stderr && out != LogOutput::Stdout) { |
|
249 |
delete_output(find_output(out->name())); |
|
250 |
} else { |
|
251 |
out->set_config_string("all=off"); |
|
252 |
} |
|
253 |
} |
|
254 |
||
255 |
void LogConfiguration::disable_logging() { |
|
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256 |
ConfigurationLock cl; |
33097 | 257 |
for (size_t i = 0; i < _n_outputs; i++) { |
258 |
disable_output(i); |
|
259 |
} |
|
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260 |
notify_update_listeners(); |
33097 | 261 |
} |
262 |
||
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263 |
void LogConfiguration::configure_stdout(LogLevelType level, bool exact_match, ...) { |
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|
264 |
size_t i; |
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|
265 |
va_list ap; |
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|
266 |
LogTagLevelExpression expr; |
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|
267 |
va_start(ap, exact_match); |
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|
268 |
for (i = 0; i < LogTag::MaxTags; i++) { |
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|
269 |
LogTagType tag = static_cast<LogTagType>(va_arg(ap, int)); |
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|
270 |
expr.add_tag(tag); |
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|
271 |
if (tag == LogTag::__NO_TAG) { |
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|
272 |
assert(i > 0, "Must specify at least one tag!"); |
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|
273 |
break; |
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|
274 |
} |
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|
275 |
} |
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|
276 |
assert(i < LogTag::MaxTags || static_cast<LogTagType>(va_arg(ap, int)) == LogTag::__NO_TAG, |
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|
277 |
"Too many tags specified! Can only have up to " SIZE_FORMAT " tags in a tag set.", LogTag::MaxTags); |
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|
278 |
va_end(ap); |
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|
279 |
|
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|
280 |
if (!exact_match) { |
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|
281 |
expr.set_allow_other_tags(); |
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|
282 |
} |
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|
283 |
expr.set_level(level); |
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|
284 |
expr.new_combination(); |
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|
285 |
|
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|
286 |
// Apply configuration to stdout (output #0), with the same decorators as before. |
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287 |
ConfigurationLock cl; |
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|
288 |
configure_output(0, expr, LogOutput::Stdout->decorators()); |
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|
289 |
notify_update_listeners(); |
34316
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|
290 |
} |
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|
291 |
|
33097 | 292 |
bool LogConfiguration::parse_command_line_arguments(const char* opts) { |
293 |
char* copy = os::strdup_check_oom(opts, mtLogging); |
|
294 |
||
295 |
// Split the option string to its colon separated components. |
|
35229
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|
296 |
char* str = copy; |
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|
297 |
char* substrings[4] = {0}; |
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|
298 |
for (int i = 0 ; i < 4; i++) { |
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|
299 |
substrings[i] = str; |
33097 | 300 |
|
35229
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|
301 |
// Find the next colon or quote |
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|
302 |
char* next = strpbrk(str, ":\""); |
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|
303 |
while (next != NULL && *next == '"') { |
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|
304 |
char* end_quote = strchr(next + 1, '"'); |
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|
305 |
if (end_quote == NULL) { |
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|
306 |
log_error(logging)("Missing terminating quote in -Xlog option '%s'", str); |
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|
307 |
os::free(copy); |
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changeset
|
308 |
return false; |
33097 | 309 |
} |
35229
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|
310 |
// Keep searching after the quoted substring |
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|
311 |
next = strpbrk(end_quote + 1, ":\""); |
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|
312 |
} |
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changeset
|
313 |
|
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|
314 |
if (next != NULL) { |
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|
315 |
*next = '\0'; |
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changeset
|
316 |
str = next + 1; |
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changeset
|
317 |
} else { |
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changeset
|
318 |
break; |
33097 | 319 |
} |
320 |
} |
|
321 |
||
35229
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|
322 |
// Parse and apply the separated configuration options |
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changeset
|
323 |
char* what = substrings[0]; |
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changeset
|
324 |
char* output = substrings[1]; |
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|
325 |
char* decorators = substrings[2]; |
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|
326 |
char* output_options = substrings[3]; |
33097 | 327 |
char errbuf[512]; |
328 |
stringStream ss(errbuf, sizeof(errbuf)); |
|
35229
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|
329 |
bool success = parse_log_arguments(output, what, decorators, output_options, &ss); |
33097 | 330 |
if (!success) { |
331 |
errbuf[strlen(errbuf) - 1] = '\0'; // Strip trailing newline. |
|
332 |
log_error(logging)("%s", errbuf); |
|
333 |
} |
|
334 |
||
335 |
os::free(copy); |
|
336 |
return success; |
|
337 |
} |
|
338 |
||
339 |
bool LogConfiguration::parse_log_arguments(const char* outputstr, |
|
340 |
const char* what, |
|
341 |
const char* decoratorstr, |
|
342 |
const char* output_options, |
|
343 |
outputStream* errstream) { |
|
344 |
if (outputstr == NULL || strlen(outputstr) == 0) { |
|
345 |
outputstr = "stdout"; |
|
346 |
} |
|
347 |
||
35228
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|
348 |
LogTagLevelExpression expr; |
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changeset
|
349 |
if (!expr.parse(what, errstream)) { |
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changeset
|
350 |
return false; |
e7bbfb90fd31
8145083: Use semaphore instead of mutex for synchronization of Unified Logging configuration
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34637
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changeset
|
351 |
} |
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changeset
|
352 |
|
e7bbfb90fd31
8145083: Use semaphore instead of mutex for synchronization of Unified Logging configuration
mlarsson
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diff
changeset
|
353 |
LogDecorators decorators; |
e7bbfb90fd31
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changeset
|
354 |
if (!decorators.parse(decoratorstr, errstream)) { |
e7bbfb90fd31
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diff
changeset
|
355 |
return false; |
e7bbfb90fd31
8145083: Use semaphore instead of mutex for synchronization of Unified Logging configuration
mlarsson
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diff
changeset
|
356 |
} |
e7bbfb90fd31
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changeset
|
357 |
|
e7bbfb90fd31
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diff
changeset
|
358 |
ConfigurationLock cl; |
33097 | 359 |
size_t idx; |
360 |
if (outputstr[0] == '#') { |
|
361 |
int ret = sscanf(outputstr+1, SIZE_FORMAT, &idx); |
|
362 |
if (ret != 1 || idx >= _n_outputs) { |
|
363 |
errstream->print_cr("Invalid output index '%s'", outputstr); |
|
364 |
return false; |
|
365 |
} |
|
366 |
} else { |
|
367 |
idx = find_output(outputstr); |
|
368 |
if (idx == SIZE_MAX) { |
|
369 |
char* tmp = os::strdup_check_oom(outputstr, mtLogging); |
|
35229
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changeset
|
370 |
LogOutput* output = new_output(tmp, output_options, errstream); |
33097 | 371 |
os::free(tmp); |
372 |
if (output == NULL) { |
|
373 |
return false; |
|
374 |
} |
|
375 |
idx = add_output(output); |
|
376 |
} else if (output_options != NULL && strlen(output_options) > 0) { |
|
377 |
errstream->print_cr("Output options for existing outputs are ignored."); |
|
378 |
} |
|
379 |
} |
|
380 |
configure_output(idx, expr, decorators); |
|
37108
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changeset
|
381 |
notify_update_listeners(); |
33097 | 382 |
return true; |
383 |
} |
|
384 |
||
385 |
void LogConfiguration::describe(outputStream* out) { |
|
386 |
out->print("Available log levels:"); |
|
387 |
for (size_t i = 0; i < LogLevel::Count; i++) { |
|
388 |
out->print("%s %s", (i == 0 ? "" : ","), LogLevel::name(static_cast<LogLevelType>(i))); |
|
389 |
} |
|
390 |
out->cr(); |
|
391 |
||
392 |
out->print("Available log decorators:"); |
|
393 |
for (size_t i = 0; i < LogDecorators::Count; i++) { |
|
394 |
LogDecorators::Decorator d = static_cast<LogDecorators::Decorator>(i); |
|
395 |
out->print("%s %s (%s)", (i == 0 ? "" : ","), LogDecorators::name(d), LogDecorators::abbreviation(d)); |
|
396 |
} |
|
397 |
out->cr(); |
|
398 |
||
399 |
out->print("Available log tags:"); |
|
400 |
for (size_t i = 1; i < LogTag::Count; i++) { |
|
401 |
out->print("%s %s", (i == 1 ? "" : ","), LogTag::name(static_cast<LogTagType>(i))); |
|
402 |
} |
|
403 |
out->cr(); |
|
404 |
||
35228
e7bbfb90fd31
8145083: Use semaphore instead of mutex for synchronization of Unified Logging configuration
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parents:
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diff
changeset
|
405 |
ConfigurationLock cl; |
33097 | 406 |
out->print_cr("Log output configuration:"); |
407 |
for (size_t i = 0; i < _n_outputs; i++) { |
|
408 |
out->print("#" SIZE_FORMAT ": %s %s ", i, _outputs[i]->name(), _outputs[i]->config_string()); |
|
409 |
for (size_t d = 0; d < LogDecorators::Count; d++) { |
|
410 |
LogDecorators::Decorator decorator = static_cast<LogDecorators::Decorator>(d); |
|
411 |
if (_outputs[i]->decorators().is_decorator(decorator)) { |
|
412 |
out->print("%s,", LogDecorators::name(decorator)); |
|
413 |
} |
|
414 |
} |
|
415 |
out->cr(); |
|
416 |
} |
|
417 |
} |
|
418 |
||
419 |
void LogConfiguration::print_command_line_help(FILE* out) { |
|
420 |
jio_fprintf(out, "-Xlog Usage: -Xlog[:[what][:[output][:[decorators][:output-options]]]]\n" |
|
421 |
"\t where 'what' is a combination of tags and levels on the form tag1[+tag2...][*][=level][,...]\n" |
|
422 |
"\t Unless wildcard (*) is specified, only log messages tagged with exactly the tags specified will be matched.\n\n"); |
|
423 |
||
424 |
jio_fprintf(out, "Available log levels:\n"); |
|
425 |
for (size_t i = 0; i < LogLevel::Count; i++) { |
|
426 |
jio_fprintf(out, "%s %s", (i == 0 ? "" : ","), LogLevel::name(static_cast<LogLevelType>(i))); |
|
427 |
} |
|
428 |
||
429 |
jio_fprintf(out, "\n\nAvailable log decorators: \n"); |
|
430 |
for (size_t i = 0; i < LogDecorators::Count; i++) { |
|
431 |
LogDecorators::Decorator d = static_cast<LogDecorators::Decorator>(i); |
|
432 |
jio_fprintf(out, "%s %s (%s)", (i == 0 ? "" : ","), LogDecorators::name(d), LogDecorators::abbreviation(d)); |
|
433 |
} |
|
434 |
jio_fprintf(out, "\n Decorators can also be specified as 'none' for no decoration.\n\n"); |
|
435 |
||
436 |
jio_fprintf(out, "Available log tags:\n"); |
|
437 |
for (size_t i = 1; i < LogTag::Count; i++) { |
|
438 |
jio_fprintf(out, "%s %s", (i == 1 ? "" : ","), LogTag::name(static_cast<LogTagType>(i))); |
|
439 |
} |
|
440 |
jio_fprintf(out, "\n Specifying 'all' instead of a tag combination matches all tag combinations.\n\n"); |
|
441 |
||
442 |
jio_fprintf(out, "Available log outputs:\n" |
|
443 |
" stdout, stderr, file=<filename>\n" |
|
444 |
" Specifying %%p and/or %%t in the filename will expand to the JVM's PID and startup timestamp, respectively.\n\n" |
|
445 |
||
446 |
"Some examples:\n" |
|
447 |
" -Xlog\n" |
|
448 |
"\t Log all messages using 'info' level to stdout with 'uptime', 'levels' and 'tags' decorations.\n" |
|
449 |
"\t (Equivalent to -Xlog:all=info:stdout:uptime,levels,tags).\n\n" |
|
450 |
||
451 |
" -Xlog:gc\n" |
|
452 |
"\t Log messages tagged with 'gc' tag using 'info' level to stdout, with default decorations.\n\n" |
|
453 |
||
454 |
" -Xlog:gc=debug:file=gc.txt:none\n" |
|
455 |
"\t Log messages tagged with 'gc' tag using 'debug' level to file 'gc.txt' with no decorations.\n\n" |
|
456 |
||
457 |
" -Xlog:gc=trace:file=gctrace.txt:uptimemillis,pids:filecount=5,filesize=1024\n" |
|
458 |
"\t Log messages tagged with 'gc' tag using 'trace' level to a rotating fileset of 5 files of size 1MB,\n" |
|
459 |
"\t using the base name 'gctrace.txt', with 'uptimemillis' and 'pid' decorations.\n\n" |
|
460 |
||
461 |
" -Xlog:gc::uptime,tid\n" |
|
462 |
"\t Log messages tagged with 'gc' tag using 'info' level to output 'stdout', using 'uptime' and 'tid' decorations.\n\n" |
|
463 |
||
464 |
" -Xlog:gc*=info,rt*=off\n" |
|
465 |
"\t Log messages tagged with at least 'gc' using 'info' level, but turn off logging of messages tagged with 'rt'.\n" |
|
466 |
"\t (Messages tagged with both 'gc' and 'rt' will not be logged.)\n\n" |
|
467 |
||
468 |
" -Xlog:disable -Xlog:rt=trace:rttrace.txt\n" |
|
469 |
"\t Turn off all logging, including warnings and errors,\n" |
|
470 |
"\t and then enable messages tagged with 'rt' using 'trace' level to file 'rttrace.txt'.\n"); |
|
471 |
} |
|
34637
9b9298044d23
8140556: Add force rotation option to VM.log jcmd
ysuenaga
parents:
34316
diff
changeset
|
472 |
|
9b9298044d23
8140556: Add force rotation option to VM.log jcmd
ysuenaga
parents:
34316
diff
changeset
|
473 |
void LogConfiguration::rotate_all_outputs() { |
35230
a528ea8203ec
8145294: TestLogRotation.java triggers a race in the UL framework
mlarsson
parents:
35229
diff
changeset
|
474 |
// Start from index 2 since neither stdout nor stderr can be rotated. |
a528ea8203ec
8145294: TestLogRotation.java triggers a race in the UL framework
mlarsson
parents:
35229
diff
changeset
|
475 |
for (size_t idx = 2; idx < _n_outputs; idx++) { |
a528ea8203ec
8145294: TestLogRotation.java triggers a race in the UL framework
mlarsson
parents:
35229
diff
changeset
|
476 |
_outputs[idx]->force_rotate(); |
34637
9b9298044d23
8140556: Add force rotation option to VM.log jcmd
ysuenaga
parents:
34316
diff
changeset
|
477 |
} |
9b9298044d23
8140556: Add force rotation option to VM.log jcmd
ysuenaga
parents:
34316
diff
changeset
|
478 |
} |
9b9298044d23
8140556: Add force rotation option to VM.log jcmd
ysuenaga
parents:
34316
diff
changeset
|
479 |
|
37108
fe800ec86077
8151264: Add a notification mechanism for UL configuration changes.
rehn
parents:
36174
diff
changeset
|
480 |
void LogConfiguration::register_update_listener(UpdateListenerFunction cb) { |
fe800ec86077
8151264: Add a notification mechanism for UL configuration changes.
rehn
parents:
36174
diff
changeset
|
481 |
assert(cb != NULL, "Should not register NULL as listener"); |
fe800ec86077
8151264: Add a notification mechanism for UL configuration changes.
rehn
parents:
36174
diff
changeset
|
482 |
ConfigurationLock cl; |
fe800ec86077
8151264: Add a notification mechanism for UL configuration changes.
rehn
parents:
36174
diff
changeset
|
483 |
size_t idx = _n_listener_callbacks++; |
fe800ec86077
8151264: Add a notification mechanism for UL configuration changes.
rehn
parents:
36174
diff
changeset
|
484 |
_listener_callbacks = REALLOC_C_HEAP_ARRAY(UpdateListenerFunction, |
fe800ec86077
8151264: Add a notification mechanism for UL configuration changes.
rehn
parents:
36174
diff
changeset
|
485 |
_listener_callbacks, |
fe800ec86077
8151264: Add a notification mechanism for UL configuration changes.
rehn
parents:
36174
diff
changeset
|
486 |
_n_listener_callbacks, |
fe800ec86077
8151264: Add a notification mechanism for UL configuration changes.
rehn
parents:
36174
diff
changeset
|
487 |
mtLogging); |
fe800ec86077
8151264: Add a notification mechanism for UL configuration changes.
rehn
parents:
36174
diff
changeset
|
488 |
_listener_callbacks[idx] = cb; |
fe800ec86077
8151264: Add a notification mechanism for UL configuration changes.
rehn
parents:
36174
diff
changeset
|
489 |
} |
fe800ec86077
8151264: Add a notification mechanism for UL configuration changes.
rehn
parents:
36174
diff
changeset
|
490 |
|
fe800ec86077
8151264: Add a notification mechanism for UL configuration changes.
rehn
parents:
36174
diff
changeset
|
491 |
void LogConfiguration::notify_update_listeners() { |
fe800ec86077
8151264: Add a notification mechanism for UL configuration changes.
rehn
parents:
36174
diff
changeset
|
492 |
assert(ConfigurationLock::current_thread_has_lock(), "notify_update_listeners must be called in ConfigurationLock scope (lock held)"); |
fe800ec86077
8151264: Add a notification mechanism for UL configuration changes.
rehn
parents:
36174
diff
changeset
|
493 |
for (size_t i = 0; i < _n_listener_callbacks; i++) { |
fe800ec86077
8151264: Add a notification mechanism for UL configuration changes.
rehn
parents:
36174
diff
changeset
|
494 |
_listener_callbacks[i](); |
fe800ec86077
8151264: Add a notification mechanism for UL configuration changes.
rehn
parents:
36174
diff
changeset
|
495 |
} |
fe800ec86077
8151264: Add a notification mechanism for UL configuration changes.
rehn
parents:
36174
diff
changeset
|
496 |
} |