* Add coverage measurement constant COVERAGE__. This constant is not

  for casual use.  Usage: (1) assign {} to COVERAGE__, (2) require or
  load Ruby source file, and (3) COVERAGE__["sourcefilepath"] will
  return an array whose elements represent number of executions per
  line of source code.

* vm_core.h: add field of coverage array to iseq.

* iseq.c (prepare_iseq_build): ditto.

* insns.def (trace): update coverage array.

* parse.y (coverage): create and initialize coverage array.

* compile.h (ADD_TRACE): add trace instruction to update covearge
  array.

* thread.c (clear_coverage): delete coverage array when forking.
  Otherwise, double count of coverage may occur.

* lib/coverage.rb: sample coverage measurement tool.

* error.c: distinguish explicitly between parse_in_eval and
  mild_compile_error.

* load.c: ditto.

* vm_eval.c: ditto.


git-svn-id: http://svn.ruby-lang.org/repos/ruby/trunk@17781 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 11 insertions, 1 deletions

diff --git a/insns.def b/insns.def
index 161dc38e2..96023a4ad 100644
--- a/insns.def
+++ b/insns.def
@@ -847,11 +847,21 @@ defined
  */
 DEFINE_INSN
 trace
-(rb_num_t nf)
+(rb_num_t nf, VALUE coverage)
 ()
 ()
 {
     rb_event_flag_t flag = nf;
+    if (coverage) {
+	long line = rb_sourceline() - 1;
+	if (RARRAY_PTR(coverage)[line] == Qnil) {
+	    rb_bug("bug");
+	}
+	long count = FIX2LONG(RARRAY_PTR(coverage)[line]) + 1;
+	if (POSFIXABLE(count)) {
+	    RARRAY_PTR(coverage)[line] = LONG2FIX(count);
+	}
+    }
     EXEC_EVENT_HOOK(th, flag, GET_SELF(), 0, 0 /* TODO: id, klass */);
 }