Add jacoco option to jt to produce coverage results

Author: bjfish

.gitignore

@@ -98,3 +98,7 @@ doc/user/README.md
 
 # Ignore .rb files at the root, it's temporary files to debug some issue
 /*.rb
+
+# Jacoco
+jacoco.exec
+/coverage/

mx.truffleruby/mx_truffleruby.py

@@ -6,11 +6,14 @@
 # GNU General Public License version 2, or
 # GNU Lesser General Public License version 2.1.
 
+from __future__ import print_function
+
 import os
 import pipes
 from os.path import join, exists, basename
 
 import mx
+import mx_gate
 import mx_sdk
 import mx_subst
 import mx_spotbugs
@@ -129,6 +132,10 @@ def ruby_run_specs(ruby, args):
     with VerboseMx():
         jt('--use', ruby, 'test', 'specs', *args)
 
+def ruby_jacoco_args(args):
+    mx_gate.add_jacoco_whitelisted_packages(['org.truffleruby'])
+    print(' '.join(mx_gate.get_jacoco_agent_args('append')))
+
 def ruby_testdownstream_hello(args):
     """Run a minimal Hello World test"""
     build_truffleruby([])
@@ -255,4 +262,5 @@ def verify_ci(args):
     'ruby_testdownstream_sulong': [ruby_testdownstream_sulong, ''],
     'ruby_spotbugs': [ruby_spotbugs, ''],
     'verify-ci' : [verify_ci, '[options]'],
+    'ruby_jacoco_args': [ruby_jacoco_args, ''],
 })

mx.truffleruby/suite.py

@@ -1,5 +1,5 @@
 suite = {
-    "mxversion": "5.258.2",
+    "mxversion": "5.275.3",
     "name": "truffleruby",
 
     "imports": {
@@ -108,6 +108,7 @@
         "org.truffleruby.annotations": {
             "dir": "src/annotations",
             "sourceDirs": ["java"],
+            "jacoco": "include",
             "javaCompliance": "8+",
             "checkstyle": "org.truffleruby",
             "workingSets": "TruffleRuby",
@@ -125,6 +126,7 @@
             "annotationProcessors": [
                 "TRUFFLERUBY-PROCESSOR",
             ],
+            "jacoco": "include",
             "javaCompliance": "8+",
             "checkstyle": "org.truffleruby",
             "workingSets": "TruffleRuby",
@@ -139,6 +141,7 @@
                 "truffleruby:TRUFFLERUBY-ANNOTATIONS",
                 "truffle:TRUFFLE_API",
             ],
+            "jacoco": "include",
             "javaCompliance": "8+",
             "checkstyle": "org.truffleruby",
             "workingSets": "TruffleRuby",
@@ -152,6 +155,7 @@
             "dependencies": [
                 "sdk:GRAAL_SDK",
             ],
+            "jacoco": "include",
             "javaCompliance": "8+",
             "checkstyle": "org.truffleruby",
             "workingSets": "TruffleRuby",
@@ -175,6 +179,7 @@
                 "truffle:TRUFFLE_DSL_PROCESSOR",
                 "TRUFFLERUBY-PROCESSOR",
             ],
+            "jacoco": "include",
             "javaCompliance": "8+",
             "checkstyle": "org.truffleruby",
             "workingSets": "TruffleRuby",
@@ -215,6 +220,7 @@
                 "sdk:GRAAL_SDK",
                 "sdk:LAUNCHER_COMMON",
             ],
+            "jacoco": "include",
             "javaCompliance": "8+",
             "checkstyle": "org.truffleruby",
             "workingSets": "TruffleRuby",

tool/jt.rb

@@ -847,6 +847,8 @@ def rebuild(*options)
         args.unshift '--check-compilation'
       when '--asm'
         vm_args += %w[--vm.XX:+UnlockDiagnosticVMOptions --vm.XX:CompileCommand=print,*::callRoot]
+      when '--jacoco'
+        vm_args << jacoco_args
       when '--jdebug'
         vm_args << JDEBUG
       when '--jexception', '--jexceptions'
@@ -1198,6 +1200,11 @@ def retag(*args)
     end
   end
 
+  private def jacoco_args
+    out = mx('ruby_jacoco_args', '--quiet', '--no-warning', capture: :out).lines.last.chomp
+    out.sub('-', '--vm.')
+  end
+
   private def test_cexts(*args)
     all_tests = %w(tools minimum method module globals backtraces xopenssl postinstallhook gems)
     no_openssl = args.delete('--no-openssl')