/**
* Sets a breakpoint (int 3 based).
*
* @returns VBox status code.
* @param pVM The VM handle.
* @param pAddress The address of the breakpoint.
* @param piHitTrigger The hit count at which the breakpoint start triggering.
* Use 0 (or 1) if it's gonna trigger at once.
* @param piHitDisable The hit count which disables the breakpoint.
* Use ~(uint64_t) if it's never gonna be disabled.
* @param piBp Where to store the breakpoint id. (optional)
* @thread Any thread.
*/
static DECLCALLBACK(int) dbgfR3BpSetInt3(PVM pVM, PCDBGFADDRESS pAddress, uint64_t *piHitTrigger, uint64_t *piHitDisable, uint32_t *piBp)
{
/*
* Validate input.
*/
if (!DBGFR3AddrIsValid(pVM, pAddress))
return VERR_INVALID_PARAMETER;
if (*piHitTrigger > *piHitDisable)
return VERR_INVALID_PARAMETER;
AssertMsgReturn(!piBp || VALID_PTR(piBp), ("piBp=%p\n", piBp), VERR_INVALID_POINTER);
if (piBp)
*piBp = ~0;
/*
* Check if the breakpoint already exists.
*/
PDBGFBP pBp = dbgfR3BpGetByAddr(pVM, DBGFBPTYPE_INT3, pAddress->FlatPtr);
if (pBp)
{
int rc = VINF_SUCCESS;
if (!pBp->fEnabled)
rc = dbgfR3BpInt3Arm(pVM, pBp);
if (RT_SUCCESS(rc))
{
rc = VINF_DBGF_BP_ALREADY_EXIST;
if (piBp)
*piBp = pBp->iBp;
}
return rc;
}
/*
* Allocate and initialize the bp.
*/
pBp = dbgfR3BpAlloc(pVM, DBGFBPTYPE_INT3);
if (!pBp)
return VERR_DBGF_NO_MORE_BP_SLOTS;
pBp->GCPtr = pAddress->FlatPtr;
pBp->iHitTrigger = *piHitTrigger;
pBp->iHitDisable = *piHitDisable;
pBp->fEnabled = true;
/*
* Now ask REM to set the breakpoint.
*/
int rc = dbgfR3BpInt3Arm(pVM, pBp);
if (RT_SUCCESS(rc))
{
if (piBp)
*piBp = pBp->iBp;
}
else
dbgfR3BpFree(pVM, pBp);
return rc;
}
/**
* EMT worker for DBGFR3BpEnable().
*
* @returns VBox status code.
* @param pVM Pointer to the VM.
* @param iBp The id of the breakpoint which should be enabled.
* @thread EMT
* @internal
*/
static DECLCALLBACK(int) dbgfR3BpEnable(PVM pVM, uint32_t iBp)
{
/*
* Validate input.
*/
PDBGFBP pBp = dbgfR3BpGet(pVM, iBp);
if (!pBp)
return VERR_DBGF_BP_NOT_FOUND;
/*
* Already enabled?
*/
if (pBp->fEnabled)
return VINF_DBGF_BP_ALREADY_ENABLED;
/*
* Remove the breakpoint.
*/
int rc;
pBp->fEnabled = true;
switch (pBp->enmType)
{
case DBGFBPTYPE_REG:
rc = dbgfR3BpRegArm(pVM, pBp);
break;
case DBGFBPTYPE_INT3:
rc = dbgfR3BpInt3Arm(pVM, pBp);
break;
case DBGFBPTYPE_REM:
#ifdef VBOX_WITH_REM
rc = REMR3BreakpointSet(pVM, pBp->GCPtr);
#else
rc = IEMBreakpointSet(pVM, pBp->GCPtr);
#endif
break;
default:
AssertMsgFailedReturn(("Invalid enmType=%d!\n", pBp->enmType), VERR_IPE_NOT_REACHED_DEFAULT_CASE);
}
if (RT_FAILURE(rc))
pBp->fEnabled = false;
return rc;
}
