/**
* Wait for a debug event.
*
* @returns VBox status. Will not return VBOX_INTERRUPTED.
* @param pVM Pointer to the VM.
* @param cMillies Number of millis to wait.
* @param ppEvent Where to store the event pointer.
*/
VMMR3DECL(int) DBGFR3EventWait(PVM pVM, RTMSINTERVAL cMillies, PCDBGFEVENT *ppEvent)
{
/*
* Check state.
*/
AssertReturn(pVM->dbgf.s.fAttached, VERR_DBGF_NOT_ATTACHED);
*ppEvent = NULL;
/*
* Wait.
*/
int rc = RTSemPongWait(&pVM->dbgf.s.PingPong, cMillies);
if (RT_SUCCESS(rc))
{
*ppEvent = &pVM->dbgf.s.DbgEvent;
Log2(("DBGF: Debugger thread: receiving event %d\n", (*ppEvent)->enmType));
return VINF_SUCCESS;
}
return rc;
}
/**
* Detaches a debugger from the specified VM.
*
* Caller must be attached to the VM.
*
* @returns VBox status code.
* @param pVM Pointer to the VM.
*/
VMMR3DECL(int) DBGFR3Detach(PVM pVM)
{
LogFlow(("DBGFR3Detach:\n"));
int rc;
/*
* Check if attached.
*/
AssertReturn(pVM->dbgf.s.fAttached, VERR_DBGF_NOT_ATTACHED);
/*
* Try send the detach command.
* Keep in mind that we might be racing EMT, so, be extra careful.
*/
DBGFCMD enmCmd = dbgfR3SetCmd(pVM, DBGFCMD_DETACH_DEBUGGER);
if (RTSemPongIsSpeaker(&pVM->dbgf.s.PingPong))
{
rc = RTSemPong(&pVM->dbgf.s.PingPong);
AssertMsgRCReturn(rc, ("Failed to signal emulation thread. rc=%Rrc\n", rc), rc);
LogRel(("DBGFR3Detach: enmCmd=%d (pong -> ping)\n", enmCmd));
}
/*
* Wait for the OK event.
*/
rc = RTSemPongWait(&pVM->dbgf.s.PingPong, RT_INDEFINITE_WAIT);
AssertLogRelMsgRCReturn(rc, ("Wait on detach command failed, rc=%Rrc\n", rc), rc);
/*
* Send the notification command indicating that we're really done.
*/
enmCmd = dbgfR3SetCmd(pVM, DBGFCMD_DETACHED_DEBUGGER);
rc = RTSemPong(&pVM->dbgf.s.PingPong);
AssertMsgRCReturn(rc, ("Failed to signal emulation thread. rc=%Rrc\n", rc), rc);
LogFlowFunc(("returns VINF_SUCCESS\n"));
return VINF_SUCCESS;
}
static DECLCALLBACK(int) tstSemPingPongThread(RTTHREAD hThread, void *pvPP)
{
int rc;
PRTPINGPONG pPP = (PRTPINGPONG)pvPP;
for (uint32_t i = 0; i < TSTSEMPINGPONG_ITERATIONS; i++)
{
if (!RTSemPongShouldWait(pPP))
{
ASMAtomicIncU32(&g_cErrors);
RTPrintf("tstSemPingPong: ERROR - RTSemPongShouldWait returned false before RTSemPongWait.\n");
}
rc = RTSemPongWait(pPP, RT_INDEFINITE_WAIT);
if (RT_FAILURE(rc))
{
ASMAtomicIncU32(&g_cErrors);
RTPrintf("tstSemPingPong: ERROR - RTSemPongWait -> %Rrc\n", rc);
break;
}
if (!RTSemPongIsSpeaker(pPP))
{
ASMAtomicIncU32(&g_cErrors);
RTPrintf("tstSemPingPong: ERROR - RTSemPongIsSpeaker returned false before RTSemPong.\n");
}
rc = RTSemPong(pPP);
if (RT_FAILURE(rc))
{
ASMAtomicIncU32(&g_cErrors);
RTPrintf("tstSemPingPong: ERROR - RTSemPong -> %Rrc\n", rc);
break;
}
}
return rc;
}
