src/share/vm/logging/logTagSet.cpp

rev 11119 : [mq]: 8146948

*** 25,35 ****
--- 25,37 ----
  #include "logging/logDecorations.hpp"
  #include "logging/logLevel.hpp"
  #include "logging/logOutput.hpp"
  #include "logging/logTag.hpp"
  #include "logging/logTagSet.hpp"
+ #include "logging/logTagSetDescriptions.inline.hpp"
  #include "memory/allocation.inline.hpp"
+ #include "utilities/ostream.hpp"
  
  LogTagSet*  LogTagSet::_list      = NULL;
  size_t      LogTagSet::_ntagsets  = 0;
  
  // This constructor is called only during static initialization.
*** 117,121 ****
--- 119,164 ----
    } else {
      log(level, buf);
    }
    va_end(saved_args);
  }
+ 
+ static const size_t TagSetBufferSize = 128;
+ 
+ void LogTagSet::describe_tagsets(outputStream* out) {
+   out->print_cr("Described tag combinations:");
+   for (const LogTagSetDescription* d = tagset_descriptions; d->tagset != NULL; d++) {
+     char buf[TagSetBufferSize];
+     d->tagset->label(buf, sizeof(buf), "+");
+     out->print_cr(" %s: %s", buf, d->descr);
+   }
+ }
+ 
+ static int qsort_strcmp(const void* a, const void* b) {
+   return strcmp((*(const char**)a), (*(const char**)b));
+ }
+ 
+ void LogTagSet::list_all_tagsets(outputStream* out) {
+   char** tagset_labels = NEW_C_HEAP_ARRAY(char*, _ntagsets, mtLogging);
+ 
+   // Generate the list of tagset labels
+   size_t idx = 0;
+   for (LogTagSet* ts = first(); ts != NULL; ts = ts->next()) {
+     char buf[TagSetBufferSize];
+     ts->label(buf, sizeof(buf), "+");
+     tagset_labels[idx++] = os::strdup_check_oom(buf, mtLogging);
+   }
+   assert(idx == _ntagsets, "_ntagsets and list of tagsets not in sync");
+ 
+   // Sort them lexicographically
+   qsort(tagset_labels, _ntagsets, sizeof(*tagset_labels), qsort_strcmp);
+ 
+   // Print and then free the labels
+   out->print("All available tag sets: ");
+   for (idx = 0; idx < _ntagsets; idx++) {
+     out->print("%s%s", (idx == 0 ? "" : ", "), tagset_labels[idx]);
+     os::free(tagset_labels[idx]);
+   }
+   out->cr();
+   FREE_C_HEAP_ARRAY(char*, tagset_labels);
+ }
+