Re-reland "Flush parallel recompilation queues on context dispose notification"

test/mjsunit/regress/regress-prepare-break-while-recompile.js

Index: test/mjsunit/regress/regress-prepare-break-while-recompile.js
diff --git a/test/mjsunit/parallel-invalidate-transition-map.js b/test/mjsunit/regress/regress-prepare-break-while-recompile.js
similarity index 69%
copy from test/mjsunit/parallel-invalidate-transition-map.js
copy to test/mjsunit/regress/regress-prepare-break-while-recompile.js
index 716f63198cd02f4ba01af39ebd11c082d507ff0a..e4941738562747e6f6e04a0091a46a7435067f52 100644
--- a/test/mjsunit/parallel-invalidate-transition-map.js
+++ b/test/mjsunit/regress/regress-prepare-break-while-recompile.js
@@ -25,33 +25,38 @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-// Flags: --track-fields --track-double-fields --allow-natives-syntax
-// Flags: --parallel-recompilation --parallel-recompilation-delay=100
+// Flags: --expose-debug-as debug --allow-natives-syntax
+// Flags: --parallel-recompilation-delay=300
 
 if (!%IsParallelRecompilationSupported()) {
   print("Parallel recompilation is disabled. Skipping this test.");
   quit();
 }
 
-function new_object() {
-  var o = {};
-  o.a = 1;
-  o.b = 2;
-  return o;
+Debug = debug.Debug
+
+function foo() {
+  var x = 1;
+  return x;
 }
 
-function add_field(obj) {
-  obj.c = 3;
+function bar() {
+  var x = 2;
+  return x;
 }
 
-add_field(new_object());
-add_field(new_object());
-%OptimizeFunctionOnNextCall(add_field, "parallel");
-
-var o = new_object();
-// Trigger optimization in the background thread.
-add_field(o);
-// Invalidate transition map while optimization is underway.
-o.c = 2.2;
-// Sync with background thread to conclude optimization that bailed out.
-assertUnoptimized(add_field, "sync");
+foo();
+// Mark and trigger parallel optimization.
+%OptimizeFunctionOnNextCall(foo, "parallel");
+foo();
+
+// Set break points on an unrelated function. This clears both optimized
+// and (shared) unoptimized code on foo, and sets both to lazy-compile builtin.
+// Clear the break point immediately after to deactivate the debugger.
+Debug.setBreakPoint(bar, 0, 0);
+Debug.clearAllBreakPoints();
+
+// Install optimized code when parallel optimization finishes.
+// This needs to be able to deal with shared code being a builtin.
+assertUnoptimized(foo, "sync");
+