8151526: Print -Xlog configuration in the hs_err_pid file

Logging configuration is now printed in hs_err and in vm info.

Reviewed-by: coleenp, mlarsson, dholmes

hotspot/src/share/vm/logging/logConfiguration.cpp

@@ -382,7 +382,7 @@ bool LogConfiguration::parse_log_arguments(const char* outputstr,
   return true;
 }
 
-void LogConfiguration::describe(outputStream* out) {
+void LogConfiguration::describe_available(outputStream* out){
   out->print("Available log levels:");
   for (size_t i = 0; i < LogLevel::Count; i++) {
     out->print("%s %s", (i == 0 ? "" : ","), LogLevel::name(static_cast<LogLevelType>(i)));
@@ -402,7 +402,9 @@ void LogConfiguration::describe(outputStream* out) {
   }
   out->cr();
 
-  ConfigurationLock cl;
+}
+
+void LogConfiguration::describe_current_configuration(outputStream* out){
   out->print_cr("Log output configuration:");
   for (size_t i = 0; i < _n_outputs; i++) {
     out->print("#" SIZE_FORMAT ": %s %s ", i, _outputs[i]->name(), _outputs[i]->config_string());
@@ -416,6 +418,12 @@ void LogConfiguration::describe(outputStream* out) {
   }
 }
 
+void LogConfiguration::describe(outputStream* out) {
+  describe_available(out);
+  ConfigurationLock cl;
+  describe_current_configuration(out);
+}
+
 void LogConfiguration::print_command_line_help(FILE* out) {
   jio_fprintf(out, "-Xlog Usage: -Xlog[:[what][:[output][:[decorators][:output-options]]]]\n"
               "\t where 'what' is a combination of tags and levels on the form tag1[+tag2...][*][=level][,...]\n"

hotspot/src/share/vm/logging/logConfiguration.hpp

@@ -37,6 +37,7 @@ class LogTagLevelExpression;
 // kept implicitly in the LogTagSets and their LogOutputLists. During configuration the tagsets
 // are iterated over and updated accordingly.
 class LogConfiguration : public AllStatic {
+ friend class VMError;
  public:
   // Function for listeners
   typedef void (*UpdateListenerFunction)(void);
@@ -79,6 +80,11 @@ class LogConfiguration : public AllStatic {
   // This should be called after any configuration change while still holding ConfigurationLock
   static void notify_update_listeners();
 
+  // Respectively describe the built-in and runtime dependent portions of the configuration.
+  static void describe_available(outputStream* out);
+  static void describe_current_configuration(outputStream* out);
+
+
  public:
   // Initialization and finalization of log configuration, to be run at vm startup and shutdown respectively.
   static void initialize(jlong vm_start_time);

hotspot/src/share/vm/utilities/vmError.cpp

@@ -28,6 +28,7 @@
 #include "compiler/compileBroker.hpp"
 #include "compiler/disassembler.hpp"
 #include "gc/shared/collectedHeap.hpp"
+#include "logging/logConfiguration.hpp"
 #include "prims/whitebox.hpp"
 #include "runtime/arguments.hpp"
 #include "runtime/atomic.inline.hpp"
@@ -774,6 +775,13 @@ void VMError::report(outputStream* st, bool _verbose) {
        st->cr();
      }
 
+  STEP(395, "(printing log configuration)")
+    if (_verbose){
+      st->print_cr("Logging:");
+      LogConfiguration::describe_current_configuration(st);
+      st->cr();
+    }
+
   STEP(400, "(printing all environment variables)" )
 
      if (_verbose) {
@@ -937,6 +945,11 @@ void VMError::print_vm_info(outputStream* st) {
     st->cr();
   }
 
+  // STEP("(printing log configuration)")
+  st->print_cr("Logging:");
+  LogConfiguration::describe(st);
+  st->cr();
+
   // STEP("(printing all environment variables)")
 
   os::print_environment_variables(st, env_list);