fix grow by count metadata prefix

src/instrumentation.rs

@@ -454,7 +454,9 @@ fn make_stable_writer(m: &mut Module, vars: &Variables, config: &Config) -> Func
             .func_body()
             .global_get(vars.page_size)
             .i32_const(65536)
-            .binop(BinaryOp::I32Mul);
+            .binop(BinaryOp::I32Mul)
+            .i32_const(METADATA_SIZE)
+            .binop(BinaryOp::I32Sub);
     }
     builder
         .func_body()
@@ -568,9 +570,8 @@ fn inject_canister_methods(m: &mut Module, vars: &Variables) {
             ExportItem::Function(id)
                 if e.name != "canister_update __motoko_async_helper"
                     && (e.name.starts_with("canister_update")
-                    // don't clear logs for query method, as we cannot store the logs anyway
-                    //|| e.name.starts_with("canister_query")
-                    //|| e.name.starts_with("canister_composite_query")
+                    || e.name.starts_with("canister_query")
+                    || e.name.starts_with("canister_composite_query")
                     || e.name.starts_with("canister_heartbeat")
                     // don't clear logs for timer and post_upgrade, as they are trigger by other signals
                     //|| e.name == "canister_global_timer"

tests/README.md

@@ -6,8 +6,11 @@ To regenerate the Wasm file:
 ```motoko
 import Region "mo:base/Region";
 actor {
-  let profiling = Region.new();
-  ignore Region.grow(profiling, 32);
+  stable let profiling = do {
+    let r = Region.new();
+    ignore Region.grow(r, 32);
+    r;
+  };
   ...
 }
 ```

tests/deployable.ic-repl.sh

@@ -100,11 +100,11 @@ let S = counter(file("ok/motoko-gc-instrument.wasm"));
 check_profiling(S, 250, 4);
 let wasm = file("ok/motoko-region-instrument.wasm");
 let S = counter(wasm);
-check_profiling(S, 463589, 78);
+check_profiling(S, 463666, 78);
 upgrade(S, wasm);
 call S.get();
 assert _ == (45 : nat);
-check_profiling(S, 472223, 374);
+check_profiling(S, 474294, 460);
 counter(file("ok/motoko-shrink.wasm"));
 counter(file("ok/motoko-limit.wasm"));