* parse.y: add dtrace probe for symbol create.

* probes.d: ditto

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@39266 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,9 @@
+Sat Feb 16 12:15:20 2013  Aaron Patterson <aaron@tenderlovemaking.com>
+
+	* parse.y: add dtrace probe for symbol create.
+
+	* probes.d: ditto
+
 Sat Feb 16 09:27:37 2013  Tanaka Akira  <akr@fsij.org>
 
 	* ext/socket/extconf.rb: don't test sys/feature_tests.h which is not

parse.y

@@ -10130,6 +10130,11 @@ static ID
 register_symid_str(ID id, VALUE str)
 {
     OBJ_FREEZE(str);
+
+    if (RUBY_DTRACE_SYMBOL_CREATE_ENABLED()) {
+	RUBY_DTRACE_SYMBOL_CREATE(RSTRING_PTR(str), rb_sourcefile(), rb_sourceline());
+    }
+
     st_add_direct(global_symbols.sym_id, (st_data_t)str, id);
     st_add_direct(global_symbols.id_str, id, (st_data_t)str);
     return id;

probes.d

@@ -150,6 +150,17 @@ provider ruby {
   */
   probe string__create(long, const char *, int);
 
+  /*
+     ruby:::symbol-create(string, filename, lineno);
+
+     This probe is fired when a Symbol is about to be allocated.
+
+      * `string` the contents of the symbol (string)
+      * `filename` the name of the file where the string is allocated (string)
+      * `lineno` the line number in the file where the string is allocated (int)
+  */
+  probe symbol__create(const char *, const char *, int);
+
   /*
      ruby:::parse-begin(sourcefile, lineno);