ZJIT: Add RubyVM::ZJIT.reset_stats! method (GH-14479)

This allows for more precise tracking of stats programmatically
which is particularly useful for our nightly benchmarking suite.

- Define rust function
- Expose to C
- Wrap with Ruby API
- Add a test

1 files changed, 5 insertions, 0 deletions

diff --git a/zjit.rb b/zjit.rb
index d70ff1dd47..39b0e5eb22 100644
--- a/zjit.rb
+++ b/zjit.rb
@@ -29,6 +29,11 @@ class << RubyVM::ZJIT
     Primitive.rb_zjit_stats(target_key)
   end
 
+  # Discard statistics collected for `--zjit-stats`.
+  def reset_stats!
+    Primitive.rb_zjit_reset_stats_bang
+  end
+
   # Get the summary of ZJIT statistics as a String
   def stats_string
     buf = +"***ZJIT: Printing ZJIT statistics on exit***\n"