diff --git a/ipc/ipdl/test/cxx/Makefile.in b/ipc/ipdl/test/cxx/Makefile.in
index fc74ff325a88..30c588475647 100644
--- a/ipc/ipdl/test/cxx/Makefile.in
+++ b/ipc/ipdl/test/cxx/Makefile.in
@@ -78,6 +78,10 @@ IPDLTESTS = \
   TestSyncWakeup \
   $(NULL)
 
+ifeq ($(OS_ARCH),Linux)
+IPDLTESTS += TestSysVShmem
+endif
+
 IPDLTESTSRCS = $(addsuffix .cpp,$(IPDLTESTS))
 IPDLTESTHDRS = $(addprefix $(srcdir)/,$(addsuffix .h,$(IPDLTESTS)))
 
diff --git a/ipc/ipdl/test/cxx/PTestSysVShmem.ipdl b/ipc/ipdl/test/cxx/PTestSysVShmem.ipdl
new file mode 100644
index 000000000000..e51acf42849b
--- /dev/null
+++ b/ipc/ipdl/test/cxx/PTestSysVShmem.ipdl
@@ -0,0 +1,22 @@
+namespace mozilla {
+namespace _ipdltest {
+
+protocol PTestSysVShmem {
+child:
+    Give(Shmem mem, size_t expectedSize);
+
+parent:
+    Take(Shmem mem, size_t expectedSize);
+    __delete__();
+
+
+state GIVING:
+    send Give goto TAKING;
+
+state TAKING:
+    recv Take goto TAKING;
+    recv __delete__;
+};
+
+}
+}
diff --git a/ipc/ipdl/test/cxx/TestSysVShmem.cpp b/ipc/ipdl/test/cxx/TestSysVShmem.cpp
new file mode 100644
index 000000000000..90d95eef8237
--- /dev/null
+++ b/ipc/ipdl/test/cxx/TestSysVShmem.cpp
@@ -0,0 +1,75 @@
+#include "TestSysVShmem.h"
+
+#include "IPDLUnitTests.h"      // fail etc.
+
+
+namespace mozilla {
+namespace _ipdltest {
+
+//-----------------------------------------------------------------------------
+// Parent
+
+void
+TestSysVShmemParent::Main()
+{
+    Shmem mem;
+    size_t size = 12345;
+    if (!AllocShmem(size, SharedMemory::TYPE_SYSV, &mem))
+        fail("can't alloc shmem");
+
+    if (mem.Size<char>() != size)
+        fail("shmem is wrong size: expected %lu, got %lu",
+             size, mem.Size<char>());
+
+    char* ptr = mem.get<char>();
+    memcpy(ptr, "Hello!", sizeof("Hello!"));
+    if (!SendGive(mem, 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;
+}
+
+
+bool
+TestSysVShmemParent::RecvTake(Shmem& mem, const size_t& expectedSize)
+{
+    if (mem.Size<char>() != expectedSize)
+        fail("expected shmem size %lu, but it has size %lu",
+             expectedSize, mem.Size<char>());
+
+    if (strcmp(mem.get<char>(), "And yourself!"))
+        fail("expected message was not written");
+
+    Close();
+
+    return true;
+}
+
+//-----------------------------------------------------------------------------
+// Child
+
+bool
+TestSysVShmemChild::RecvGive(Shmem& mem, const size_t& expectedSize)
+{
+    if (mem.Size<char>() != expectedSize)
+        fail("expected shmem size %lu, but it has size %lu",
+             expectedSize, mem.Size<char>());
+
+    if (strcmp(mem.get<char>(), "Hello!"))
+        fail("expected message was not written");
+
+    memcpy(mem.get<char>(), "And yourself!", sizeof("And yourself!"));
+
+    if (!SendTake(mem, expectedSize))
+        fail("can't send Take()");
+
+    return true;
+}
+
+
+} // namespace _ipdltest
+} // namespace mozilla
diff --git a/ipc/ipdl/test/cxx/TestSysVShmem.h b/ipc/ipdl/test/cxx/TestSysVShmem.h
new file mode 100644
index 000000000000..ce98d6d0a06f
--- /dev/null
+++ b/ipc/ipdl/test/cxx/TestSysVShmem.h
@@ -0,0 +1,65 @@
+#ifndef mozilla__ipdltest_TestSysVShmem_h
+#define mozilla__ipdltest_TestSysVShmem_h
+
+#include "mozilla/_ipdltest/IPDLUnitTests.h"
+
+#include "mozilla/_ipdltest/PTestSysVShmemParent.h"
+#include "mozilla/_ipdltest/PTestSysVShmemChild.h"
+
+namespace mozilla {
+namespace _ipdltest {
+
+
+class TestSysVShmemParent :
+    public PTestSysVShmemParent
+{
+public:
+    TestSysVShmemParent() { }
+    virtual ~TestSysVShmemParent() { }
+
+    void Main();
+
+protected:
+    NS_OVERRIDE
+    virtual bool RecvTake(
+            Shmem& mem,
+            const size_t& expectedSize);
+
+    NS_OVERRIDE
+    virtual void ActorDestroy(ActorDestroyReason why)
+    {
+        if (NormalShutdown != why)
+            fail("unexpected destruction!");  
+        passed("ok");
+        QuitParent();
+    }
+};
+
+
+class TestSysVShmemChild :
+    public PTestSysVShmemChild
+{
+public:
+    TestSysVShmemChild() { }
+    virtual ~TestSysVShmemChild() { }
+
+protected:
+    NS_OVERRIDE
+    virtual bool RecvGive(
+            Shmem& mem,
+            const size_t& expectedSize);
+
+    NS_OVERRIDE
+    virtual void ActorDestroy(ActorDestroyReason why)
+    {
+        if (NormalShutdown != why)
+            fail("unexpected destruction!");
+        QuitChild();
+    }
+};
+
+
+} // namespace _ipdltest
+} // namespace mozilla
+
+#endif // ifndef mozilla__ipdltest_TestSysVShmem_h
diff --git a/ipc/ipdl/test/cxx/ipdl.mk b/ipc/ipdl/test/cxx/ipdl.mk
index 1ab038fb440c..aaf3118e3b13 100644
--- a/ipc/ipdl/test/cxx/ipdl.mk
+++ b/ipc/ipdl/test/cxx/ipdl.mk
@@ -26,4 +26,5 @@ IPDLSRCS =					\
   PTestShutdownSubsub.ipdl			\
   PTestStackHooks.ipdl				\
   PTestSyncWakeup.ipdl				\
+  PTestSysVShmem.ipdl				\
   $(NULL)