Use exec() in jt for MRI tests and benchmarks

PullRequest: truffleruby/511

Author: eregon

tool/jt.rb

@@ -468,14 +468,14 @@ def help
           options                                    build the options
           cexts                                      build only the C extensions (part of "jt build")
           native [--no-sulong] [--no-jvmci] [--no-sforceimports] [--no-tools] [extra mx image options]
-                                                     build a native image of TruffleRuby (--no-jvmci to use the system Java) 
+                                                     build a native image of TruffleRuby (--no-jvmci to use the system Java)
                                                      (--no-tools to exclude chromeinspector and profiler)
       jt build_stats [--json] <attribute>            prints attribute's value from build process (e.g., binary size)
       jt clean                                       clean
       jt env                                         prints the current environment
       jt rebuild                                     clean, sforceimports, and build
       jt dis <file>                                  finds the bc file in the project, disassembles, and returns new filename
-      jt ruby [jt options] [--] [ruby options] args...  
+      jt ruby [jt options] [--] [ruby options] args...
                                                      run TruffleRuby with args
           --graal         use Graal (set either GRAALVM_BIN, JVMCI_BIN or GRAAL_HOME, or have graal built as a sibling)
               --stress    stress the compiler (compile immediately, foreground compilation, compilation exceptions are fatal)
@@ -489,7 +489,7 @@ def help
           --jdebug        run a JDWP debug server on #{JDEBUG_PORT}
           --jexception[s] print java exceptions
           --exec          use exec rather than system
-          --no-print-cmd  don\'t print the command          
+          --no-print-cmd  don\'t print the command
       jt gem                                         shortcut for `jt ruby -S gem`, to install Ruby gems, etc
       jt e 14 + 2                                    evaluate an expression
       jt puts 14 + 2                                 evaluate and print an expression
@@ -974,11 +974,11 @@ def test_mri(*args)
       end
     end.sort - excluded_files
 
-    run_mri_tests(mri_args, files_to_run, runner_args)
+    run_mri_tests(mri_args, files_to_run, runner_args, use_exec: true)
   end
   private :test_mri
 
-  def run_mri_tests(extra_args, test_files, runner_args, run_options = {})
+  def run_mri_tests(extra_args, test_files, runner_args, run_options)
     prefix = "test/mri/tests/"
     abs_prefix = "#{TRUFFLERUBY_DIR}/#{prefix}"
     test_files = test_files.map { |file|
@@ -1063,7 +1063,7 @@ def retag(*args)
     sh "ruby", "tool/parse_mri_errors.rb", output_file
 
     puts "3. Verifying tests pass"
-    run_mri_tests(options, test_files, [])
+    run_mri_tests(options, test_files, [], use_exec: true)
   end
 
   def test_compiler(*args)
@@ -1764,9 +1764,9 @@ def benchmark(*args)
     run_args.push *args
 
     if benchmark_ruby
-      sh benchmark_ruby, *run_args
+      sh benchmark_ruby, *run_args, use_exec: true
     else
-      run_ruby *run_args
+      run_ruby *run_args, use_exec: true
     end
   end