* gc.c (rb_gc_set_params): output GC parameter change messages only

  if -w/-v options are specified. these messages are output to stderr,
  not to stdout. [ruby-core:39795] [Bug #5380]

* test/ruby/test_gc.rb (test_gc_parameter): add test for it.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@33379 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

3 files changed, 23 insertions, 4 deletions

diff --git a/ChangeLog b/ChangeLog
index 9abab6038f..34df1fa040 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,11 @@
+Mon Oct  3 23:56:39 2011  CHIKANAGA Tomoyuki  <nagachika00@gmail.com>
+
+	* gc.c (rb_gc_set_params): output GC parameter change messages only
+	  if -w/-v options are specified. these messages are output to stderr,
+	  not to stdout. [ruby-core:39795] [Bug #5380]
+
+	* test/ruby/test_gc.rb (test_gc_parameter): add test for it.
+
 Sun Oct  2 20:05:32 2011  Kazuki Tsujimoto  <kazuki@callcc.net>
 
 	* vm.c (rb_thread_mark), cont.c (cont_mark): revert r33369 and r33371
diff --git a/gc.c b/gc.c
index 1fce29ae6e..9f9d6b884a 100644
--- a/gc.c
+++ b/gc.c
@@ -427,7 +427,9 @@ rb_gc_set_params(void)
     malloc_limit_ptr = getenv("RUBY_GC_MALLOC_LIMIT");
     if (malloc_limit_ptr != NULL) {
 	int malloc_limit_i = atoi(malloc_limit_ptr);
-	printf("malloc_limit=%d (%d)\n", malloc_limit_i, initial_malloc_limit);
+	if (ruby_verbose)
+	    fprintf(stderr, "malloc_limit=%d (%d)\n",
+		    malloc_limit_i, initial_malloc_limit);
 	if (malloc_limit_i > 0) {
 	    initial_malloc_limit = malloc_limit_i;
 	}
@@ -436,7 +438,9 @@ rb_gc_set_params(void)
     heap_min_slots_ptr = getenv("RUBY_HEAP_MIN_SLOTS");
     if (heap_min_slots_ptr != NULL) {
 	int heap_min_slots_i = atoi(heap_min_slots_ptr);
-	printf("heap_min_slots=%d (%d)\n", heap_min_slots_i, initial_heap_min_slots);
+	if (ruby_verbose)
+	    fprintf(stderr, "heap_min_slots=%d (%d)\n",
+		    heap_min_slots_i, initial_heap_min_slots);
 	if (heap_min_slots_i > 0) {
 	    initial_heap_min_slots = heap_min_slots_i;
             initial_expand_heap(&rb_objspace);
@@ -446,7 +450,8 @@ rb_gc_set_params(void)
     free_min_ptr = getenv("RUBY_FREE_MIN");
     if (free_min_ptr != NULL) {
 	int free_min_i = atoi(free_min_ptr);
-	printf("free_min=%d (%d)\n", free_min_i, initial_free_min);
+	if (ruby_verbose)
+	    fprintf(stderr, "free_min=%d (%d)\n", free_min_i, initial_free_min);
 	if (free_min_i > 0) {
 	    initial_free_min = free_min_i;
 	}
diff --git a/test/ruby/test_gc.rb b/test/ruby/test_gc.rb
index b294c5445e..736f9349d3 100644
--- a/test/ruby/test_gc.rb
+++ b/test/ruby/test_gc.rb
@@ -86,6 +86,12 @@ class TestGc < Test::Unit::TestCase
       "RUBY_GC_MALLOC_LIMIT" => "60000000",
       "RUBY_HEAP_MIN_SLOTS" => "100000"
     }
-    assert_normal_exit("1", "[ruby-core:39777]", :child_env => env)
+    assert_normal_exit("exit", "[ruby-core:39777]", :child_env => env)
+
+    env = {
+      "RUBY_HEAP_MIN_SLOTS" => "100000"
+    }
+    assert_in_out_err([env, "-e", "exit"], "", [], [], "[ruby-core:39795]")
+    assert_in_out_err([env, "-w", "-e", "exit"], "", [], /heap_min_slots=100000/, "[ruby-core:39795]")
   end
 end