| 1 | /******************************************************************************
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| 2 | * $Header: /CommonBe/agmsmith/Programming/SteadyCast/KernelLeakTest/RCS/KernelLeaker.cpp,v 1.2 2019/11/22 21:42:23 agmsmith Exp $
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| 3 | *
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| 4 | * Compile with: g++ -lbe KernelLeaker.cpp
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| 5 | *
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| 6 | * Looking in to a kernel_team memory leak - seems to happen when BMessages are
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| 7 | * sent to different teams when using the same BMessenger. Run it and watch
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| 8 | * the memory usage in ProcessController for the kernel_team, you'll see it
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| 9 | * cranking up slowly. When the program is exited, the leaks remain.
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| 10 | *
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| 11 | * By AGMS, write to agmsmith@ncf.ca
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| 12 | */
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| 13 |
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| 14 | /* Standard C Library. */
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| 15 |
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| 16 | #include <stdio.h>
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| 17 | #include <stdlib.h>
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| 18 |
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| 19 | /* BeOS (Be Operating System) headers. */
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| 20 |
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| 21 | #include <Application.h>
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| 22 |
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| 23 | static const char *g_AppSignature =
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| 24 | "application/x-vnd.agmsmith.kernel-leak-20191122";
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| 25 |
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| 26 |
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| 27 | class KernelLeakerApp : public BApplication
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| 28 | {
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| 29 | public:
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| 30 | /* Constructor and destructor. */
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| 31 | KernelLeakerApp ();
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| 32 | ~KernelLeakerApp ();
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| 33 |
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| 34 | /* BeOS virtual functions. */
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| 35 | virtual void Pulse ();
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| 36 | virtual bool QuitRequested ();
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| 37 | virtual void ReadyToRun ();
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| 38 |
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| 39 | };
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| 40 |
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| 41 |
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| 42 | /******************************************************************************
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| 43 | * Implementation of the KernelLeakerApp class. Constructor, destructor and
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| 44 | * the rest of the member functions in mostly alphabetical order.
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| 45 | */
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| 46 |
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| 47 | KernelLeakerApp::KernelLeakerApp () : BApplication (g_AppSignature)
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| 48 | {
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| 49 | SetName ("Kernel Leaker $Revision: 1.2 $");
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| 50 | }
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| 51 |
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| 52 |
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| 53 | KernelLeakerApp::~KernelLeakerApp ()
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| 54 | {
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| 55 | }
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| 56 |
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| 57 |
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| 58 | void KernelLeakerApp::Pulse ()
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| 59 | {
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| 60 | status_t ErrorCode = B_OK;
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| 61 | BMessage ReplyMessage;
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| 62 | BMessage ScriptMessage;
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| 63 |
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| 64 | static const char *Signatures[] = { // Deskbar and Tracker.
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| 65 | "application/x-vnd.Be-TSKB",
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| 66 | "application/x-vnd.Be-TRAK",
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| 67 | "application/x-vnd.Be-TSKB",
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| 68 | "application/x-vnd.Be-TRAK",
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| 69 | "application/x-vnd.Be-TSKB",
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| 70 | "application/x-vnd.Be-TRAK",
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| 71 | "application/x-vnd.Be-TSKB",
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| 72 | "application/x-vnd.Be-TRAK",
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| 73 | "application/x-vnd.Be-TSKB",
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| 74 | "application/x-vnd.Be-TRAK",
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| 75 | NULL
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| 76 | };
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| 77 |
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| 78 | int iSig;
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| 79 | for (iSig = 0; Signatures[iSig] != NULL; iSig++)
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| 80 | {
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| 81 | ErrorCode = B_OK;
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| 82 | BMessenger MessengerToTarget(Signatures[iSig], -1, &ErrorCode);
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| 83 | if (ErrorCode != B_OK)
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| 84 | {
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| 85 | printf ("Failed to set target.\n");
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| 86 | return;
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| 87 | }
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| 88 |
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| 89 | // Send BMessages to various loopers in the target application.
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| 90 |
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| 91 | int i;
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| 92 | for (i = 0; i < 10; i++)
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| 93 | {
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| 94 | ScriptMessage.MakeEmpty ();
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| 95 | ScriptMessage.what = B_GET_PROPERTY;
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| 96 | ScriptMessage.AddSpecifier ("InternalName");
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| 97 | ScriptMessage.AddSpecifier ("Looper", (int32) i);
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| 98 | ReplyMessage.MakeEmpty ();
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| 99 | ErrorCode = MessengerToTarget.SendMessage (
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| 100 | &ScriptMessage, &ReplyMessage,
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| 101 | 100000 /* delivery timeout */, 100000 /* reply timeout */);
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| 102 | const char *NameString = NULL;
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| 103 | if (ErrorCode != B_OK || ReplyMessage.FindString ("result",
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| 104 | &NameString) != B_OK || NameString == NULL)
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| 105 | continue; // Ignore Loopers that don't exist or aren't scriptable.
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| 106 |
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| 107 | // printf ("Name %d: %s\n", i, NameString);
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| 108 | }
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| 109 | }
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| 110 | }
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| 111 |
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| 112 |
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| 113 | bool KernelLeakerApp::QuitRequested ()
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| 114 | {
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| 115 | return BApplication::QuitRequested ();
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| 116 | }
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| 117 |
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| 118 |
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| 119 | void KernelLeakerApp::ReadyToRun ()
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| 120 | {
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| 121 | // Turn on the periodic Pulse() callback, maximum speed is 1/10 of a second,
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| 122 | // though that's too fast (can't process quit messages).
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| 123 |
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| 124 | SetPulseRate (1500000);
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| 125 | }
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| 126 |
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| 127 |
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| 128 | /******************************************************************************
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| 129 | * Finally, the main program which drives it all.
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| 130 | */
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| 131 |
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| 132 | int main (int argc, char**)
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| 133 | {
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| 134 | KernelLeakerApp MyApp;
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| 135 |
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| 136 | if (MyApp.InitCheck () == 0)
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| 137 | {
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| 138 | MyApp.Run ();
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| 139 | }
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| 140 | printf ("Finished running the Kernel Leaker experiment.\n");
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| 141 | return 0;
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| 142 | }
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| 143 |
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| 144 |
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| 145 | /******************************************************************************
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| 146 | * $Log: KernelLeaker.cpp,v $
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| 147 | * Revision 1.2 2019/11/22 21:42:23 agmsmith
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| 148 | * Adapted for BeOS too (no BMessenger::SetTo() function).
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| 149 | *
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| 150 | * Revision 1.1 2019/11/22 21:34:59 agmsmith
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| 151 | * Initial revision
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| 152 | */
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