* vm_dump.c (rb_print_backtrace): current implementation

uses dladdr to get the path of objects.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@45489 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,8 @@
+Tue Apr  1 07:27:15 2014  NARUSE, Yui  <naruse@ruby-lang.org>
+
+	* vm_dump.c (rb_print_backtrace): current implementation
+	  uses dladdr to get the path of objects.
+
 Mon Mar 31 23:57:45 2014  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* ext/readline/extconf.rb: fix typo, `$defs` not `$DEFS`.

vm_dump.c

@@ -683,7 +683,7 @@ rb_print_backtrace(void)
 #define MAX_NATIVE_TRACE 1024
     static void *trace[MAX_NATIVE_TRACE];
     int n = backtrace(trace, MAX_NATIVE_TRACE);
-#ifdef USE_ELF
+#if defined(USE_ELF) && defined(HAVE_DLADDR)
     rb_dump_backtrace_with_lines(n, trace);
 #else
     char **syms = backtrace_symbols(trace, n);