Merge pull request #273 from WebAssembly/memory-growth

Fix and test memory growth

3 files changed, 43 insertions, 0 deletions

diff --git a/test/grow_memory.cpp b/test/grow_memory.cpp
new file mode 100644
index 000000000..b8f732f7a
--- /dev/null
+++ b/test/grow_memory.cpp
@@ -0,0 +1,20 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <emscripten.h>
+
+volatile int writeOnly;
+
+int main() {
+  EM_ASM({
+    assert(HEAPU8.length === 16*1024*1024);
+  });
+  for (int i = 0; i < 20; i++) {
+    printf("alloc 1MB: %d\n", i);
+    writeOnly = (int)malloc(1024*1024);
+  }
+  EM_ASM({
+    assert(HEAPU8.length > 16*1024*1024);
+  });
+  printf("ok.\n");
+}
+
diff --git a/test/grow_memory.emcc b/test/grow_memory.emcc
new file mode 100644
index 000000000..5a0c6fea0
--- /dev/null
+++ b/test/grow_memory.emcc
@@ -0,0 +1 @@
+["-s", "ALLOW_MEMORY_GROWTH=1"]
diff --git a/test/grow_memory.txt b/test/grow_memory.txt
new file mode 100644
index 000000000..2adc5a8c2
--- /dev/null
+++ b/test/grow_memory.txt
@@ -0,0 +1,22 @@
+alloc 1MB: 0
+alloc 1MB: 1
+alloc 1MB: 2
+alloc 1MB: 3
+alloc 1MB: 4
+alloc 1MB: 5
+alloc 1MB: 6
+alloc 1MB: 7
+alloc 1MB: 8
+alloc 1MB: 9
+alloc 1MB: 10
+alloc 1MB: 11
+alloc 1MB: 12
+alloc 1MB: 13
+alloc 1MB: 14
+alloc 1MB: 15
+alloc 1MB: 16
+alloc 1MB: 17
+alloc 1MB: 18
+alloc 1MB: 19
+ok.
+