* test/ruby/envutil.rb (assert_no_memory_leak): On Solaris 9 or later,

  if possible, execute child ruby with environment variables
  LD_PRELOAD=libumem.so UMEM_OPTIONS="backend=mmap". With these
  variables, freed memory is immediately returned to the OS.
  [Bug #10020] [ruby-dev:48391]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@46791 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 28 insertions, 0 deletions

diff --git a/test/ruby/envutil.rb b/test/ruby/envutil.rb
index 6ba77de053..bbfdbf6d22 100644
--- a/test/ruby/envutil.rb
+++ b/test/ruby/envutil.rb
@@ -408,6 +408,29 @@ eom
         assert_warning(*args) {$VERBOSE = false; yield}
       end
 
+      case RUBY_PLATFORM
+      when /solaris2\.(?:9|[1-9][0-9])/i # Solaris 9, 10, 11,...
+        bits = [nil].pack('p').size == 8 ? 64 : 32
+        if ENV['LD_PRELOAD'].to_s.empty? &&
+            ENV["LD_PRELOAD_#{bits}"].to_s.empty? &&
+            (ENV['UMEM_OPTIONS'].to_s.empty? ||
+             ENV['UMEM_OPTIONS'] == 'backend=mmap') then
+          envs = {
+            'LD_PRELOAD' => 'libumem.so',
+            'UMEM_OPTIONS' => 'backend=mmap'
+          }
+          args = [
+            envs,
+            "--disable=gems",
+            "-v", "-",
+          ]
+          _, err, status = EnvUtil.invoke_ruby(args, "exit(0)", true, true)
+          if status.exitstatus == 0 && err.to_s.empty? then
+            NO_MEMORY_LEAK_ENVS = envs
+          end
+        end
+      end #case RUBY_PLATFORM
+
       def assert_no_memory_leak(args, prepare, code, message=nil, limit: 1.5, rss: false, **opt)
         require_relative 'memory_status'
         token = "\e[7;1m#{$$.to_s}:#{Time.now.strftime('%s.%L')}:#{rand(0x10000).to_s(16)}:\e[m"
@@ -420,6 +443,11 @@ eom
           *args,
           "-v", "-",
         ]
+        if defined? NO_MEMORY_LEAK_ENVS then
+          envs ||= {}
+          newenvs = envs.merge(NO_MEMORY_LEAK_ENVS) { |_, _, _| break }
+          envs = newenvs if newenvs
+        end
         args.unshift(envs) if envs
         cmd = [
           'END {STDERR.puts '"#{token_dump}"'"FINAL=#{Memory::Status.new}"}',