1 files changed, 115 insertions, 0 deletions
diff --git a/ipc/ipdl/test/cxx/TestShmem.cpp b/ipc/ipdl/test/cxx/TestShmem.cpp
new file mode 100644
index 000000000..1ff62bc3a
--- /dev/null
+++ b/ipc/ipdl/test/cxx/TestShmem.cpp
@@ -0,0 +1,115 @@
+#include "TestShmem.h"
+
+#include "IPDLUnitTests.h"      // fail etc.
+
+
+namespace mozilla {
+namespace _ipdltest {
+
+//-----------------------------------------------------------------------------
+// Parent
+
+void
+TestShmemParent::Main()
+{
+    Shmem mem;
+    Shmem unsafe;
+
+    size_t size = 12345;
+    if (!AllocShmem(size, SharedMemory::TYPE_BASIC, &mem))
+        fail("can't alloc shmem");
+    if (!AllocUnsafeShmem(size, SharedMemory::TYPE_BASIC, &unsafe))
+        fail("can't alloc shmem");
+
+    if (mem.Size<char>() != size)
+        fail("shmem is wrong size: expected %lu, got %lu",
+             size, mem.Size<char>());
+    if (unsafe.Size<char>() != size)
+        fail("shmem is wrong size: expected %lu, got %lu",
+             size, unsafe.Size<char>());
+
+    char* ptr = mem.get<char>();
+    memcpy(ptr, "Hello!", sizeof("Hello!"));
+
+    char* unsafeptr = unsafe.get<char>();
+    memcpy(unsafeptr, "Hello!", sizeof("Hello!"));
+
+    Shmem unsafecopy = unsafe;
+    if (!SendGive(mem, unsafe, size))
+        fail("can't send Give()");
+
+    // uncomment the following line for a (nondeterministic) surprise!
+    //char c1 = *ptr;  (void)c1;
+
+    // uncomment the following line for a deterministic surprise!
+    //char c2 = *mem.get<char>(); (void)c2;
+
+    // unsafe shmem gets rid of those checks
+    char uc1 = *unsafeptr;  (void)uc1;
+    char uc2 = *unsafecopy.get<char>(); (void)uc2;
+}
+
+
+bool
+TestShmemParent::RecvTake(Shmem&& mem, Shmem&& unsafe,
+                          const size_t& expectedSize)
+{
+    if (mem.Size<char>() != expectedSize)
+        fail("expected shmem size %lu, but it has size %lu",
+             expectedSize, mem.Size<char>());
+    if (unsafe.Size<char>() != expectedSize)
+        fail("expected shmem size %lu, but it has size %lu",
+             expectedSize, unsafe.Size<char>());
+
+    if (strcmp(mem.get<char>(), "And yourself!"))
+        fail("expected message was not written");
+    if (strcmp(unsafe.get<char>(), "And yourself!"))
+        fail("expected message was not written");
+
+    if (!DeallocShmem(mem))
+        fail("DeallocShmem");
+    if (!DeallocShmem(unsafe))
+        fail("DeallocShmem");
+
+    Close();
+
+    return true;
+}
+
+//-----------------------------------------------------------------------------
+// Child
+
+bool
+TestShmemChild::RecvGive(Shmem&& mem, Shmem&& unsafe, const size_t& expectedSize)
+{
+    if (mem.Size<char>() != expectedSize)
+        fail("expected shmem size %lu, but it has size %lu",
+             expectedSize, mem.Size<char>());
+    if (unsafe.Size<char>() != expectedSize)
+        fail("expected shmem size %lu, but it has size %lu",
+             expectedSize, unsafe.Size<char>());
+
+    if (strcmp(mem.get<char>(), "Hello!"))
+        fail("expected message was not written");
+    if (strcmp(unsafe.get<char>(), "Hello!"))
+        fail("expected message was not written");
+
+    char* unsafeptr = unsafe.get<char>();
+
+    memcpy(mem.get<char>(), "And yourself!", sizeof("And yourself!"));
+    memcpy(unsafeptr, "And yourself!", sizeof("And yourself!"));
+
+    Shmem unsafecopy = unsafe;
+    if (!SendTake(mem, unsafe, expectedSize))
+        fail("can't send Take()");
+
+    // these checks also shouldn't fail in the child
+    char uc1 = *unsafeptr;  (void)uc1;
+    char uc2 = *unsafecopy.get<char>(); (void)uc2;
+
+    return true;
+}
+
+
+} // namespace _ipdltest
+} // namespace mozilla