ipc/ipdl/test/cxx/TestHangs.cpp@6474c204b198 (annotated)
ipc/ipdl/test/cxx/TestHangs.cpp
Wed, 31 Dec 2014 06:09:35 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Wed, 31 Dec 2014 06:09:35 +0100
- changeset 0
- 6474c204b198
- permissions
- -rw-r--r--
Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.
| michael@0 | 1 | #include "base/process_util.h" |
| michael@0 | 2 | |
| michael@0 | 3 | #include "TestHangs.h" |
| michael@0 | 4 | |
| michael@0 | 5 | #include "IPDLUnitTests.h" // fail etc. |
| michael@0 | 6 | |
| michael@0 | 7 | using base::KillProcess; |
| michael@0 | 8 | |
| michael@0 | 9 | template<> |
| michael@0 | 10 | struct RunnableMethodTraits<mozilla::_ipdltest::TestHangsParent> |
| michael@0 | 11 | { |
| michael@0 | 12 | static void RetainCallee(mozilla::_ipdltest::TestHangsParent* obj) { } |
| michael@0 | 13 | static void ReleaseCallee(mozilla::_ipdltest::TestHangsParent* obj) { } |
| michael@0 | 14 | }; |
| michael@0 | 15 | |
| michael@0 | 16 | namespace mozilla { |
| michael@0 | 17 | namespace _ipdltest { |
| michael@0 | 18 | |
| michael@0 | 19 | //----------------------------------------------------------------------------- |
| michael@0 | 20 | // parent |
| michael@0 | 21 | |
| michael@0 | 22 | TestHangsParent::TestHangsParent() : mDetectedHang(false) |
| michael@0 | 23 | { |
| michael@0 | 24 | MOZ_COUNT_CTOR(TestHangsParent); |
| michael@0 | 25 | } |
| michael@0 | 26 | |
| michael@0 | 27 | TestHangsParent::~TestHangsParent() |
| michael@0 | 28 | { |
| michael@0 | 29 | MOZ_COUNT_DTOR(TestHangsParent); |
| michael@0 | 30 | } |
| michael@0 | 31 | |
| michael@0 | 32 | void |
| michael@0 | 33 | TestHangsParent::Main() |
| michael@0 | 34 | { |
| michael@0 | 35 | // Here we try to set things up to test the following sequence of events: |
| michael@0 | 36 | // |
| michael@0 | 37 | // - subprocess causes an OnMaybeDequeueOne() task to be posted to |
| michael@0 | 38 | // this thread |
| michael@0 | 39 | // |
| michael@0 | 40 | // - subprocess hangs just long enough for the hang timer to expire |
| michael@0 | 41 | // |
| michael@0 | 42 | // - hang-kill code in the parent starts running |
| michael@0 | 43 | // |
| michael@0 | 44 | // - subprocess replies to message while hang code runs |
| michael@0 | 45 | // |
| michael@0 | 46 | // - reply is processed in OnMaybeDequeueOne() before Close() has |
| michael@0 | 47 | // been called or the channel error notification has been posted |
| michael@0 | 48 | |
| michael@0 | 49 | // this tells the subprocess to send us Nonce() |
| michael@0 | 50 | if (!SendStart()) |
| michael@0 | 51 | fail("sending Start"); |
| michael@0 | 52 | |
| michael@0 | 53 | // now we sleep here for a while awaiting the Nonce() message from |
| michael@0 | 54 | // the child. since we're not blocked on anything, the IO thread |
| michael@0 | 55 | // will enqueue an OnMaybeDequeueOne() task to process that |
| michael@0 | 56 | // message |
| michael@0 | 57 | // |
| michael@0 | 58 | // NB: PR_Sleep is exactly what we want, only the current thread |
| michael@0 | 59 | // sleeping |
| michael@0 | 60 | PR_Sleep(5000); |
| michael@0 | 61 | |
| michael@0 | 62 | // when we call into this, we'll pull the Nonce() message out of |
| michael@0 | 63 | // the mPending queue, but that doesn't matter ... the |
| michael@0 | 64 | // OnMaybeDequeueOne() event will remain |
| michael@0 | 65 | if (CallStackFrame() && mDetectedHang) |
| michael@0 | 66 | fail("should have timed out!"); |
| michael@0 | 67 | |
| michael@0 | 68 | // the Close() task in the queue will shut us down |
| michael@0 | 69 | } |
| michael@0 | 70 | |
| michael@0 | 71 | bool |
| michael@0 | 72 | TestHangsParent::ShouldContinueFromReplyTimeout() |
| michael@0 | 73 | { |
| michael@0 | 74 | mDetectedHang = true; |
| michael@0 | 75 | |
| michael@0 | 76 | // so we've detected a timeout after 2 ms ... now we cheat and |
| michael@0 | 77 | // sleep for a long time, to allow the subprocess's reply to come |
| michael@0 | 78 | // in |
| michael@0 | 79 | |
| michael@0 | 80 | PR_Sleep(5000); |
| michael@0 | 81 | |
| michael@0 | 82 | // reply should be here; we'll post a task to shut things down. |
| michael@0 | 83 | // This must be after OnMaybeDequeueOne() in the event queue. |
| michael@0 | 84 | MessageLoop::current()->PostTask( |
| michael@0 | 85 | FROM_HERE, NewRunnableMethod(this, &TestHangsParent::CleanUp)); |
| michael@0 | 86 | |
| michael@0 | 87 | return false; |
| michael@0 | 88 | } |
| michael@0 | 89 | |
| michael@0 | 90 | bool |
| michael@0 | 91 | TestHangsParent::AnswerStackFrame() |
| michael@0 | 92 | { |
| michael@0 | 93 | if (PTestHangs::HANG != state()) { |
| michael@0 | 94 | if (CallStackFrame()) |
| michael@0 | 95 | fail("should have timed out!"); |
| michael@0 | 96 | } |
| michael@0 | 97 | else { |
| michael@0 | 98 | // minimum possible, 2 ms. We want to detecting a hang to race |
| michael@0 | 99 | // with the reply coming in, as reliably as possible |
| michael@0 | 100 | SetReplyTimeoutMs(2); |
| michael@0 | 101 | |
| michael@0 | 102 | if (CallHang()) |
| michael@0 | 103 | fail("should have timed out!"); |
| michael@0 | 104 | } |
| michael@0 | 105 | |
| michael@0 | 106 | return true; |
| michael@0 | 107 | } |
| michael@0 | 108 | |
| michael@0 | 109 | void |
| michael@0 | 110 | TestHangsParent::CleanUp() |
| michael@0 | 111 | { |
| michael@0 | 112 | if (!KillProcess(OtherProcess(), 0, false)) |
| michael@0 | 113 | fail("terminating child process"); |
| michael@0 | 114 | Close(); |
| michael@0 | 115 | } |
| michael@0 | 116 | |
| michael@0 | 117 | |
| michael@0 | 118 | //----------------------------------------------------------------------------- |
| michael@0 | 119 | // child |
| michael@0 | 120 | |
| michael@0 | 121 | TestHangsChild::TestHangsChild() |
| michael@0 | 122 | { |
| michael@0 | 123 | MOZ_COUNT_CTOR(TestHangsChild); |
| michael@0 | 124 | } |
| michael@0 | 125 | |
| michael@0 | 126 | TestHangsChild::~TestHangsChild() |
| michael@0 | 127 | { |
| michael@0 | 128 | MOZ_COUNT_DTOR(TestHangsChild); |
| michael@0 | 129 | } |
| michael@0 | 130 | |
| michael@0 | 131 | bool |
| michael@0 | 132 | TestHangsChild::AnswerHang() |
| michael@0 | 133 | { |
| michael@0 | 134 | puts(" (child process is 'hanging' now)"); |
| michael@0 | 135 | |
| michael@0 | 136 | // just sleep until we're reasonably confident the 1ms hang |
| michael@0 | 137 | // detector fired in the parent process and it's sleeping in |
| michael@0 | 138 | // ShouldContinueFromReplyTimeout() |
| michael@0 | 139 | PR_Sleep(1000); |
| michael@0 | 140 | |
| michael@0 | 141 | return true; |
| michael@0 | 142 | } |
| michael@0 | 143 | |
| michael@0 | 144 | } // namespace _ipdltest |
| michael@0 | 145 | } // namespace mozilla |
