Add a "slow" test for FFI memory leaks, for #4625.

jruby · May 30, 2017 · 6b6f27b · 6b6f27b
1 parent 9da60d7
commit 6b6f27b
Showing 2 changed files with 20 additions and 0 deletions.
diff --git a/test/jruby/test_ffi_pointer_leak.rb b/test/jruby/test_ffi_pointer_leak.rb
@@ -0,0 +1,19 @@
+require 'ffi'
+require 'test/unit'
+
+class TestFFIMemoryLeak < Test::Unit::TestCase
+  java_import java.lang.management.ManagementFactory
+  def test_4625
+    5.times { JRuby.gc }
+    initial = ManagementFactory.memory_mx_bean.non_heap_memory_usage.used
+    i = 0
+    10_000_000.times do
+      ptr = FFI::MemoryPointer.from_string('some random test string')
+      ptr.free
+      i += 1
+    end
+    5.times { JRuby.gc }
+    memory = ManagementFactory.get_memory_mx_bean.get_non_heap_memory_usage.used
+    assert (memory - initial) / initial < 0.10, "memory after allocations was more than 10% higher"
+  end
+end
diff --git a/test/slow.index b/test/slow.index
@@ -1,2 +1,3 @@
 jruby/test_command_line_switches
 jruby/test_launching_by_shell_script
+jruby/test_ffi_pointer_leak