Make wasm test faster

.circleci/config.yml

@@ -326,7 +326,13 @@ jobs:
 
       - run:
           name: Run tests
-          command: cd GDevelop.js && npm run test -- --maxWorkers=4
+          # Tests are slow under ASan and jest (in a non-TTY environment) only prints
+          # output when a whole test file finishes, so allow long silences instead of
+          # killing the step after the default 10 minutes without output.
+          no_output_timeout: 30m
+          # malloc_context_size: record fewer stack frames on each malloc/free (default
+          # is 30) - a small, free speedup that only shortens traces in ASan reports.
+          command: cd GDevelop.js && ASAN_OPTIONS=malloc_context_size=5 npm run test -- --maxWorkers=4
 
       # Upload artifacts (CircleCI)
       - store_artifacts:

GDevelop.js/Bindings/prejs.js

@@ -1,7 +1,14 @@
 // If running under ASAN, disable the "container overflow" checks because of false positives
 // with std::vector<gd::String>. See https://github.com/google/sanitizers/wiki/AddressSanitizerContainerOverflow.
-if (Module['ASAN_OPTIONS'] === undefined)
-  Module['ASAN_OPTIONS'] ='detect_container_overflow=0';
+// Also append options from the ASAN_OPTIONS environment variable when running in Node.js,
+// as Emscripten only reads them from Module['ASAN_OPTIONS'] (not from the environment).
+if (Module['ASAN_OPTIONS'] === undefined) {
+  var envAsanOptions =
+    typeof process !== 'undefined' && process.env && process.env.ASAN_OPTIONS
+      ? ':' + process.env.ASAN_OPTIONS
+      : '';
+  Module['ASAN_OPTIONS'] = 'detect_container_overflow=0' + envAsanOptions;
+}
 
 // Prevent calling process["exit"] when there is a abort/runtime crash
 // (useful for tests when running ASAN, to see the logs).

GDevelop.js/CMakeLists.txt

@@ -23,7 +23,7 @@ elseif("${GDEVELOPJS_BUILD_VARIANT}" STREQUAL "debug-assertions")
 	# Debug with assertions: no optimization.
 	SET( CMAKE_CXX_FLAGS  "${CMAKE_CXX_FLAGS} -g --profiling") # Debugging + profiling support
 elseif("${GDEVELOPJS_BUILD_VARIANT}" STREQUAL "debug-sanitizers")
-	# Debug with sanitizers: no optimization.
+	# Debug with sanitizers (note: -O3 from the Release build type still applies at compile time).
 	SET( CMAKE_CXX_FLAGS  "${CMAKE_CXX_FLAGS} -g --profiling") # Debugging + profiling support
 	add_compile_options(-fsanitize=address) # Uncomment to auto-detect occurences of memory bugs (memory leak, use after free, overflows, ...) - also enable linking below!
 	# add_compile_options(-fsanitize=undefined) # Uncomment to auto-detect occurences of undefined behavior - also enable linking below!
@@ -111,6 +111,8 @@ elseif("${GDEVELOPJS_BUILD_VARIANT}" STREQUAL "debug-assertions")
 	# target_link_libraries(--memoryprofiler) # Uncomment for interactive memory profiling
 elseif("${GDEVELOPJS_BUILD_VARIANT}" STREQUAL "debug-sanitizers")
 	message(STATUS "'debug-sanitizers' variant: enabling ASAN and other sanitizers")
+	target_link_libraries(GD "-O1") # Some optimization at link time (default is -O0), to make the tests run a bit faster in CI.
+	target_link_libraries(GD "-s INITIAL_MEMORY=512MB") # Start with a large heap: ASan needs a lot of memory (256MB quarantine for freed allocations, shadow memory) and growing the memory repeatedly has a cost. Overrides TOTAL_MEMORY set above.
 	target_link_libraries(GD "-fsanitize=address") # Uncomment to auto-detect occurences of memory bugs (memory leak, use after free, overflows, ...) - also enable compiling above!
 	# target_link_libraries(GD "-fsanitize=undefined") # Uncomment to auto-detect occurences of undefined behavior - also enable compiling above!
 	target_link_libraries(GD "-fsanitize=null") # Uncomment to auto-detect occurences of undefined behavior - also enable compiling above!

GDevelop.js/__tests__/Serializer.js

@@ -105,10 +105,11 @@ describe('libGD.js object serialization', function () {
         ']';
 
       const element = gd.Serializer.fromJSON(json);
+      // Do NOT delete element, it's a static value.
+
       // Round-trips back to the same JSON (also proves the large input was
       // parsed correctly, not just that it didn't crash).
       expect(gd.Serializer.toJSON(element)).toBe(json);
-      element.delete();
     });
   });