1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/ipc/ipdl/test/cxx/TestInterruptErrorCleanup.cpp Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,155 @@
1.4 +#include "TestInterruptErrorCleanup.h"
1.5 +
1.6 +#include "mozilla/CondVar.h"
1.7 +#include "mozilla/Mutex.h"
1.8 +
1.9 +#include "IPDLUnitTests.h" // fail etc.
1.10 +#include "IPDLUnitTestSubprocess.h"
1.11 +
1.12 +using mozilla::CondVar;
1.13 +using mozilla::Mutex;
1.14 +using mozilla::MutexAutoLock;
1.15 +
1.16 +namespace mozilla {
1.17 +namespace _ipdltest {
1.18 +
1.19 +//-----------------------------------------------------------------------------
1.20 +// parent
1.21 +
1.22 +namespace {
1.23 +
1.24 +// NB: this test does its own shutdown, rather than going through
1.25 +// QuitParent(), because it's testing degenerate edge cases
1.26 +
1.27 +void DeleteSubprocess(Mutex* mutex, CondVar* cvar)
1.28 +{
1.29 + MutexAutoLock lock(*mutex);
1.30 +
1.31 + delete gSubprocess;
1.32 + gSubprocess = nullptr;
1.33 +
1.34 + cvar->Notify();
1.35 +}
1.36 +
1.37 +void DeleteTheWorld()
1.38 +{
1.39 + delete static_cast<TestInterruptErrorCleanupParent*>(gParentActor);
1.40 + gParentActor = nullptr;
1.41 +
1.42 + // needs to be synchronous to avoid affecting event ordering on
1.43 + // the main thread
1.44 + Mutex mutex("TestInterruptErrorCleanup.DeleteTheWorld.mutex");
1.45 + CondVar cvar(mutex, "TestInterruptErrorCleanup.DeleteTheWorld.cvar");
1.46 +
1.47 + MutexAutoLock lock(mutex);
1.48 +
1.49 + XRE_GetIOMessageLoop()->PostTask(
1.50 + FROM_HERE,
1.51 + NewRunnableFunction(DeleteSubprocess, &mutex, &cvar));
1.52 +
1.53 + cvar.Wait();
1.54 +}
1.55 +
1.56 +void Done()
1.57 +{
1.58 + static NS_DEFINE_CID(kAppShellCID, NS_APPSHELL_CID);
1.59 + nsCOMPtr<nsIAppShell> appShell (do_GetService(kAppShellCID));
1.60 + appShell->Exit();
1.61 +
1.62 + passed(__FILE__);
1.63 +}
1.64 +
1.65 +} // namespace <anon>
1.66 +
1.67 +TestInterruptErrorCleanupParent::TestInterruptErrorCleanupParent()
1.68 + : mGotProcessingError(false)
1.69 +{
1.70 + MOZ_COUNT_CTOR(TestInterruptErrorCleanupParent);
1.71 +}
1.72 +
1.73 +TestInterruptErrorCleanupParent::~TestInterruptErrorCleanupParent()
1.74 +{
1.75 + MOZ_COUNT_DTOR(TestInterruptErrorCleanupParent);
1.76 +}
1.77 +
1.78 +void
1.79 +TestInterruptErrorCleanupParent::Main()
1.80 +{
1.81 + // This test models the following sequence of events
1.82 + //
1.83 + // (1) Parent: Interrupt out-call
1.84 + // (2) Child: crash
1.85 + // --[Parent-only hereafter]--
1.86 + // (3) Interrupt out-call return false
1.87 + // (4) Close()
1.88 + // --[event loop]--
1.89 + // (5) delete parentActor
1.90 + // (6) delete childProcess
1.91 + // --[event loop]--
1.92 + // (7) Channel::OnError notification
1.93 + // --[event loop]--
1.94 + // (8) Done, quit
1.95 + //
1.96 + // See bug 535298 and friends; this seqeunce of events captures
1.97 + // three differnent potential errors
1.98 + // - Close()-after-error (semantic error previously)
1.99 + // - use-after-free of parentActor
1.100 + // - use-after-free of channel
1.101 + //
1.102 + // Because of legacy constraints related to nsNPAPI* code, we need
1.103 + // to ensure that this sequence of events can occur without
1.104 + // errors/crashes.
1.105 +
1.106 + MessageLoop::current()->PostTask(
1.107 + FROM_HERE, NewRunnableFunction(DeleteTheWorld));
1.108 +
1.109 + // it's a failure if this *succeeds*
1.110 + if (CallError())
1.111 + fail("expected an error!");
1.112 +
1.113 + if (!mGotProcessingError)
1.114 + fail("expected a ProcessingError() notification");
1.115 +
1.116 + // it's OK to Close() a channel after an error, because nsNPAPI*
1.117 + // wants to do this
1.118 + Close();
1.119 +
1.120 + // we know that this event *must* be after the MaybeError
1.121 + // notification enqueued by AsyncChannel, because that event is
1.122 + // enqueued within the same mutex that ends up signaling the
1.123 + // wakeup-on-error of |CallError()| above
1.124 + MessageLoop::current()->PostTask(FROM_HERE, NewRunnableFunction(Done));
1.125 +}
1.126 +
1.127 +void
1.128 +TestInterruptErrorCleanupParent::ProcessingError(Result what)
1.129 +{
1.130 + if (what != MsgDropped)
1.131 + fail("unexpected processing error");
1.132 + mGotProcessingError = true;
1.133 +}
1.134 +
1.135 +//-----------------------------------------------------------------------------
1.136 +// child
1.137 +
1.138 +TestInterruptErrorCleanupChild::TestInterruptErrorCleanupChild()
1.139 +{
1.140 + MOZ_COUNT_CTOR(TestInterruptErrorCleanupChild);
1.141 +}
1.142 +
1.143 +TestInterruptErrorCleanupChild::~TestInterruptErrorCleanupChild()
1.144 +{
1.145 + MOZ_COUNT_DTOR(TestInterruptErrorCleanupChild);
1.146 +}
1.147 +
1.148 +bool
1.149 +TestInterruptErrorCleanupChild::AnswerError()
1.150 +{
1.151 + _exit(0);
1.152 + NS_RUNTIMEABORT("unreached");
1.153 + return false;
1.154 +}
1.155 +
1.156 +
1.157 +} // namespace _ipdltest
1.158 +} // namespace mozilla
