browser gc test

1 files changed, 96 insertions, 0 deletions

diff --git a/tests/browser_gc.cpp b/tests/browser_gc.cpp
new file mode 100644
index 00000000..75dea10a
--- /dev/null
+++ b/tests/browser_gc.cpp
@@ -0,0 +1,96 @@
+#include <stdio.h>
+#include <gc.h>
+#include <assert.h>
+#include <emscripten.h>
+
+void *global;
+
+int freed = 0;
+
+void finalizer(void *ptr, void *arg) {
+  printf("finalizing %d (global == %d)\n", (int)arg, ptr == global);
+  freed++;
+  if (ptr == global) global = 0;
+}
+
+int stage = 0;
+float start = 0;
+
+void waiter() {
+  if (stage == 0) { // wait for a while, see no GCing
+    assert(global);
+    if (emscripten_get_now() - start > 2100) {
+      GC_MALLOC(1024*1024*2); // allocate enough to trigger a GC
+      start = emscripten_get_now();
+      stage = 1;
+      printf("stage 1\n");
+    }
+  } else if (stage == 1) {
+    assert(global);
+    if (freed > 0) {
+      GC_FREE(global);
+      stage = 2;
+      start = emscripten_get_now();
+      printf("stage 2\n");
+    }
+    if (emscripten_get_now() - start > 2100) {
+      printf("fail, too much time passed (a)\n");
+      return;
+    }
+  } else if (stage == 2) {
+    if (emscripten_get_now() - start > 2100) { // wait and see that no gc'ing happens yet
+      GC_MALLOC(1024*1024*2); // allocate enough to trigger a GC
+      stage = 3;
+      start = emscripten_get_now();
+      printf("stage 3\n");
+    }
+  } else if (stage == 3) {
+    assert(!global);
+    if (freed == 5) {
+      printf("Ok.\n");
+      int result = 1;
+      REPORT_RESULT();
+      return;
+    }
+    if (emscripten_get_now() - start > 2100) {
+      printf("fail, too much time passed (b)\n");
+      return;
+    }
+  }
+
+  emscripten_async_call(waiter, 100);
+}
+
+int main() {
+  start = emscripten_get_now();
+
+  GC_INIT();
+
+  void *local, *local2, *local3, *local4;
+
+  global = GC_MALLOC(12);
+  GC_REGISTER_FINALIZER_NO_ORDER(global, finalizer, 0, 0, 0);
+  local = GC_MALLOC(12);
+  GC_REGISTER_FINALIZER_NO_ORDER(local, finalizer, (void*)1, 0, 0);
+  local2 = GC_MALLOC_ATOMIC(12);
+  GC_REGISTER_FINALIZER_NO_ORDER(local2, finalizer, (void*)2, 0, 0);
+  local3 = GC_MALLOC(12);
+  GC_REGISTER_FINALIZER_NO_ORDER(local3, finalizer, (void*)3, 0, 0);
+  local4 = GC_MALLOC(12);
+  GC_REGISTER_FINALIZER_NO_ORDER(local4, finalizer, (void*)4, 0, 0);
+
+  void **globalData = (void**)global;
+  globalData[0] = local;
+  globalData[1] = local2;
+
+  void **localData = (void**)local;
+  localData[0] = local3;
+
+  void **local2Data = (void**)local2;
+  local2Data[0] = local4; // actually ignored, because local2 is atomic, so 4 is freeable
+
+  emscripten_async_call(waiter, 100);
+
+  return 0;
+}
+