thread.c (rb_reset_coverages): remove coverage counters from all ISeqs

When coverage measurement is enabled, the compiler makes each iseq have
a reference to the counter array of coverage.
Even after coverage measurement is disabled, the reference is kept.
And, if coverage measurement is restarted, a coverage hook will increase
the counter.  This is completely meaningless; it brings just overhead.

To remove this meaninglessness, this change removes all the reference
when coverage measuement is stopped.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@64504 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 2 insertions, 0 deletions

diff --git a/iseq.h b/iseq.h
index b8c10d8816..44ed3bdedf 100644
--- a/iseq.h
+++ b/iseq.h
@@ -178,6 +178,8 @@ VALUE rb_iseq_first_lineno(const rb_iseq_t *iseq);
 VALUE rb_iseq_method_name(const rb_iseq_t *iseq);
 void rb_iseq_code_location(const rb_iseq_t *iseq, int *first_lineno, int *first_column, int *last_lineno, int *last_column);
 
+void rb_iseq_remove_coverage_all();
+
 /* proc.c */
 const rb_iseq_t *rb_method_iseq(VALUE body);
 const rb_iseq_t *rb_proc_get_iseq(VALUE proc, int *is_proc);