Removing instances of exec_ctx being passed around in functions in

src/core. exec_ctx is now a thread_local pointer of type ExecCtx instead of
grpc_exec_ctx which is initialized whenever ExecCtx is instantiated. ExecCtx
also keeps track of the previous exec_ctx so that nesting of exec_ctx is
allowed. This means that there is only one exec_ctx being used at any
time. Also, grpc_exec_ctx_finish is called in the destructor of the
object, and the previous exec_ctx is restored to avoid breaking current
functionality. The code still explicitly calls grpc_exec_ctx_finish
because removing all such instances causes the code to break.

1 files changed, 8 insertions, 8 deletions

diff --git a/test/core/debug/stats_test.cc b/test/core/debug/stats_test.cc
index c85ab3598a..ac7c3af8a4 100644
--- a/test/core/debug/stats_test.cc
+++ b/test/core/debug/stats_test.cc
@@ -47,9 +47,9 @@ TEST(StatsTest, IncCounters) {
   for (int i = 0; i < GRPC_STATS_COUNTER_COUNT; i++) {
     Snapshot snapshot;
 
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    GRPC_STATS_INC_COUNTER(&exec_ctx, (grpc_stats_counters)i);
-    grpc_exec_ctx_finish(&exec_ctx);
+    ExecCtx _local_exec_ctx;
+    GRPC_STATS_INC_COUNTER((grpc_stats_counters)i);
+    grpc_exec_ctx_finish();
 
     EXPECT_EQ(snapshot.delta().counters[i], 1);
   }
@@ -58,9 +58,9 @@ TEST(StatsTest, IncCounters) {
 TEST(StatsTest, IncSpecificCounter) {
   Snapshot snapshot;
 
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  GRPC_STATS_INC_SYSCALL_POLL(&exec_ctx);
-  grpc_exec_ctx_finish(&exec_ctx);
+  ExecCtx _local_exec_ctx;
+  GRPC_STATS_INC_SYSCALL_POLL();
+  grpc_exec_ctx_finish();
 
   EXPECT_EQ(snapshot.delta().counters[GRPC_STATS_COUNTER_SYSCALL_POLL], 1);
 }
@@ -99,9 +99,9 @@ TEST(StatsTest, IncHistogram) {
 
       int expected_bucket = FindExpectedBucket(i, j);
 
-      grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+      ExecCtx _local_exec_ctx;
       grpc_stats_inc_histogram[i](&exec_ctx, j);
-      grpc_exec_ctx_finish(&exec_ctx);
+      grpc_exec_ctx_finish();
 
       auto delta = snapshot.delta();