bool
ThreadHandler::_DoStepOver(CpuState* cpuState)
{
TRACE_CONTROL("ThreadHandler::_DoStepOver()\n");
// The basic strategy is to single-step out of the statement like for
// "step into", only we have to avoid stepping into subroutines. Hence we
// check whether the current instruction is a subroutine call. If not, we
// just single-step, otherwise we set a breakpoint after the instruction.
InstructionInfo info;
if (fDebuggerInterface->GetArchitecture()->GetInstructionInfo(
cpuState->InstructionPointer(), info, cpuState) != B_OK) {
TRACE_CONTROL(" failed to get instruction info\n");
return false;
}
if (info.Type() != INSTRUCTION_TYPE_SUBROUTINE_CALL) {
_SingleStepThread(cpuState->InstructionPointer());
TRACE_CONTROL(" not a subroutine call\n");
return true;
}
TRACE_CONTROL(" subroutine call -- installing breakpoint at address "
"%#" B_PRIx64 "\n", info.Address() + info.Size());
if (_InstallTemporaryBreakpoint(info.Address() + info.Size()) != B_OK)
return false;
fSteppedOverFunctionAddress = info.TargetAddress();
_RunThread(cpuState->InstructionPointer());
return true;
}
status_t
BreakpointManager::_UpdateBreakpointInstallation(Breakpoint* breakpoint)
{
bool shouldBeInstalled = breakpoint->ShouldBeInstalled();
TRACE_CONTROL("BreakpointManager::_UpdateBreakpointInstallation(%p): "
"should be installed: %d, is installed: %d\n", breakpoint,
shouldBeInstalled, breakpoint->IsInstalled());
if (shouldBeInstalled == breakpoint->IsInstalled())
return B_OK;
if (shouldBeInstalled) {
// install
status_t error = fDebuggerInterface->InstallBreakpoint(
breakpoint->Address());
if (error != B_OK)
return error;
TRACE_CONTROL("BREAKPOINT at %#llx installed: %s\n",
breakpoint->Address(), strerror(error));
breakpoint->SetInstalled(true);
} else {
// uninstall
fDebuggerInterface->UninstallBreakpoint(breakpoint->Address());
TRACE_CONTROL("BREAKPOINT at %#llx uninstalled\n",
breakpoint->Address());
breakpoint->SetInstalled(false);
}
return B_OK;
}
bool
ThreadHandler::_HandleSingleStepStep(CpuState* cpuState)
{
TRACE_CONTROL("ThreadHandler::_HandleSingleStepStep(): ip: %llx\n",
cpuState->InstructionPointer());
switch (fStepMode) {
case STEP_INTO:
{
// We continue stepping as long as we're in the statement.
if (fStepStatement->ContainsAddress(cpuState->InstructionPointer())) {
_SingleStepThread(cpuState->InstructionPointer());
return true;
}
return false;
}
case STEP_OVER:
{
// If we have stepped out of the statement, we're done.
if (!fStepStatement->ContainsAddress(cpuState->InstructionPointer()))
return false;
return _DoStepOver(cpuState);
}
case STEP_OUT:
// We never single-step in this case.
default:
return false;
}
}
bool
ThreadHandler::_HandleSingleStepStep(CpuState* cpuState)
{
TRACE_CONTROL("ThreadHandler::_HandleSingleStepStep(): ip: %llx\n",
cpuState->InstructionPointer());
switch (fStepMode) {
case STEP_INTO:
{
// We continue stepping as long as we're in the statement.
if (fStepStatement->ContainsAddress(cpuState->InstructionPointer())) {
_SingleStepThread(cpuState->InstructionPointer());
return true;
}
StackTrace* stackTrace = fThread->GetStackTrace();
BReference<StackTrace> stackTraceReference(stackTrace);
if (stackTrace == NULL && cpuState != NULL) {
if (fDebuggerInterface->GetArchitecture()->CreateStackTrace(
fThread->GetTeam(), this, cpuState, stackTrace) == B_OK) {
stackTraceReference.SetTo(stackTrace, true);
}
}
if (stackTrace != NULL) {
StackFrame* frame = stackTrace->FrameAt(0);
Image* image = frame->GetImage();
ImageDebugInfo* info = NULL;
if (GetImageDebugInfo(image, info) != B_OK)
return false;
BReference<ImageDebugInfo>(info, true);
if (info->GetAddressSectionType(
cpuState->InstructionPointer())
== ADDRESS_SECTION_TYPE_PLT) {
_SingleStepThread(cpuState->InstructionPointer());
return true;
}
}
return false;
}
case STEP_OVER:
{
// If we have stepped out of the statement, we're done.
if (!fStepStatement->ContainsAddress(cpuState->InstructionPointer()))
return false;
return _DoStepOver(cpuState);
}
case STEP_OUT:
// We never single-step in this case.
default:
return false;
}
}
void
TeamDebugger::_HandleClearUserBreakpoint(target_addr_t address)
{
TRACE_CONTROL("TeamDebugger::_HandleClearUserBreakpoint(%#llx)\n", address);
AutoLocker< ::Team> locker(fTeam);
Breakpoint* breakpoint = fTeam->BreakpointAtAddress(address);
if (breakpoint == NULL || breakpoint->FirstUserBreakpoint() == NULL)
return;
UserBreakpoint* userBreakpoint
= breakpoint->FirstUserBreakpoint()->GetUserBreakpoint();
BReference<UserBreakpoint> userBreakpointReference(userBreakpoint);
locker.Unlock();
_HandleClearUserBreakpoint(userBreakpoint);
}
void
TeamDebugger::_HandleInspectAddress(target_addr_t address,
TeamMemoryBlock::Listener* listener)
{
TRACE_CONTROL("TeamDebugger::_HandleInspectAddress(%" B_PRIx64 ", %p)\n",
address, listener);
TeamMemoryBlock* memoryBlock = fMemoryBlockManager
->GetMemoryBlock(address);
if (memoryBlock == NULL) {
_NotifyUser("Inspect Address", "Failed to allocate memory block");
return;
}
if (!memoryBlock->HasListener(listener))
memoryBlock->AddListener(listener);
if (!memoryBlock->IsValid()) {
AutoLocker< ::Team> teamLocker(fTeam);
TeamMemory* memory = fTeam->GetTeamMemory();
// schedule the job
status_t result;
if ((result = fWorker->ScheduleJob(
new(std::nothrow) RetrieveMemoryBlockJob(fTeam, memory,
memoryBlock),
this)) != B_OK) {
memoryBlock->ReleaseReference();
_NotifyUser("Inspect Address", "Failed to retrieve memory data: %s",
strerror(result));
}
} else
memoryBlock->NotifyDataRetrieved();
}
bool
ThreadHandler::_HandleBreakpointHitStep(CpuState* cpuState)
{
// in any case uninstall the temporary breakpoint
_UninstallTemporaryBreakpoint();
switch (fStepMode) {
case STEP_OVER:
{
StackTrace* stackTrace = fThread->GetStackTrace();
BReference<StackTrace> stackTraceReference(stackTrace);
if (stackTrace == NULL && cpuState != NULL) {
if (fDebuggerInterface->GetArchitecture()->CreateStackTrace(
fThread->GetTeam(), this, cpuState, stackTrace, NULL,
1, false, false) == B_OK) {
stackTraceReference.SetTo(stackTrace, true);
}
}
if (stackTrace != NULL) {
StackFrame* frame = stackTrace->FrameAt(0);
// If we're not in the same frame we started in,
// keep executing.
if (frame != NULL && fPreviousFrameAddress
!= frame->FrameAddress()) {
status_t error = _InstallTemporaryBreakpoint(
cpuState->InstructionPointer());
if (error != B_OK)
_StepFallback();
else
_RunThread(cpuState->InstructionPointer());
return true;
}
}
if (fPreviousFrameAddress != 0 && fSteppedOverFunctionAddress
!= cpuState->InstructionPointer()) {
TRACE_CONTROL("STEP_OVER: called function address %#" B_PRIx64
", previous frame address: %#" B_PRIx64 ", frame address: %#"
B_PRIx64 ", adding return info\n", fSteppedOverFunctionAddress,
fPreviousFrameAddress, stackTrace->FrameAt(0)->FrameAddress());
ReturnValueInfo* returnInfo = new(std::nothrow) ReturnValueInfo(
fSteppedOverFunctionAddress, cpuState);
if (returnInfo == NULL)
return false;
BReference<ReturnValueInfo> returnInfoReference(returnInfo, true);
if (fThread->AddReturnValueInfo(returnInfo) != B_OK)
return false;
returnInfoReference.Detach();
fSteppedOverFunctionAddress = 0;
}
// If we're still in the statement, we continue single-stepping,
// otherwise we're done.
if (fStepStatement->ContainsAddress(
cpuState->InstructionPointer())) {
if (!_DoStepOver(cpuState))
_StepFallback();
return true;
}
fPreviousFrameAddress = 0;
return false;
}
case STEP_INTO:
// Should never happen -- we don't set a breakpoint in this case.
return false;
case STEP_OUT:
{
// That's the return address, so we're done in theory,
// unless we're a recursive function. Check if we've actually
// exited the previous stack frame or not
if (!_HasExitedFrame(cpuState->StackFramePointer())) {
status_t error = _InstallTemporaryBreakpoint(
cpuState->InstructionPointer());
if (error != B_OK)
_StepFallback();
else
_RunThread(cpuState->InstructionPointer());
return true;
}
if (fPreviousFrameAddress == 0)
return false;
TRACE_CONTROL("ThreadHandler::_HandleBreakpointHitStep() - "
"frame pointer 0x%#" B_PRIx64 ", previous: 0x%#" B_PRIx64
" - step out adding return value\n", cpuState
->StackFramePointer(), fPreviousFrameAddress);
ReturnValueInfo* info = new(std::nothrow) ReturnValueInfo(
fPreviousInstructionPointer, cpuState);
if (info == NULL)
return false;
BReference<ReturnValueInfo> infoReference(info, true);
if (fThread->AddReturnValueInfo(info) != B_OK)
return false;
infoReference.Detach();
fPreviousFrameAddress = 0;
}
default:
return false;
}
}
void
ThreadHandler::HandleThreadAction(uint32 action, target_addr_t address)
{
AutoLocker<Team> locker(fThread->GetTeam());
if (fThread->State() == THREAD_STATE_UNKNOWN)
return;
// When stop is requested, thread must be running, otherwise stopped.
if (action == MSG_THREAD_STOP
? fThread->State() != THREAD_STATE_RUNNING
: fThread->State() != THREAD_STATE_STOPPED) {
return;
}
// When stepping we need a stack trace. Save it before unsetting the state.
CpuState* cpuState = fThread->GetCpuState();
StackTrace* stackTrace = fThread->GetStackTrace();
BReference<CpuState> cpuStateReference(cpuState);
BReference<StackTrace> stackTraceReference(stackTrace);
if (action == MSG_THREAD_SET_ADDRESS) {
_HandleSetAddress(cpuState, address);
return;
}
// When continuing the thread update thread state before actually issuing
// the command, since we need to unlock.
if (action != MSG_THREAD_STOP) {
_SetThreadState(THREAD_STATE_RUNNING, NULL, THREAD_STOPPED_UNKNOWN,
BString());
}
locker.Unlock();
switch (action) {
case MSG_THREAD_RUN:
fStepMode = address != 0 ? STEP_UNTIL : STEP_NONE;
if (address != 0)
_InstallTemporaryBreakpoint(address);
_RunThread(0);
return;
case MSG_THREAD_STOP:
fStepMode = STEP_NONE;
if (fDebuggerInterface->StopThread(ThreadID()) == B_OK)
fThread->SetStopRequestPending();
return;
case MSG_THREAD_STEP_OVER:
case MSG_THREAD_STEP_INTO:
case MSG_THREAD_STEP_OUT:
break;
}
TRACE_CONTROL("ThreadHandler::HandleThreadAction(MSG_THREAD_STEP_*)\n");
// We want to step. We need a stack trace for that purpose. If we don't
// have one yet, get it. Start with the CPU state.
if (stackTrace == NULL && cpuState == NULL) {
if (fDebuggerInterface->GetCpuState(fThread->ID(), cpuState) == B_OK)
cpuStateReference.SetTo(cpuState, true);
}
if (stackTrace == NULL && cpuState != NULL) {
if (fDebuggerInterface->GetArchitecture()->CreateStackTrace(
fThread->GetTeam(), this, cpuState, stackTrace, NULL, 1,
false, false) == B_OK) {
stackTraceReference.SetTo(stackTrace, true);
}
}
if (stackTrace == NULL || stackTrace->CountFrames() == 0) {
_StepFallback();
return;
}
StackFrame* frame = stackTrace->FrameAt(0);
TRACE_CONTROL(" ip: %#" B_PRIx64 "\n", frame->InstructionPointer());
target_addr_t frameIP = frame->GetCpuState()->InstructionPointer();
// When the thread is in a syscall, do the same for all step kinds: Stop it
// when it returns by means of a breakpoint.
if (frame->Type() == STACK_FRAME_TYPE_SYSCALL) {
// set a breakpoint at the CPU state's instruction pointer (points to
// the return address, unlike the stack frame's instruction pointer)
// TODO: This is doesn't work correctly anymore. When stepping over a "syscall"
// instruction the thread is stopped twice. The after the first step the PC is
// incorrectly shown at the "syscall" instruction. Then we step again and are
// stopped at the temporary breakpoint after the "syscall" instruction. There
// are two problems. The first one is that we don't (cannot?) discriminate
// between the thread being in a syscall (like in a blocking syscall) and the
// thread having been stopped (or singled-stepped) at the end of the syscall.
// The second issue is that the temporary breakpoint is probably not necessary
// anymore, since single-stepping over "syscall" instructions should just work
// as expected.
status_t error = _InstallTemporaryBreakpoint(frameIP);
if (error != B_OK) {
_StepFallback();
return;
}
fStepMode = STEP_OUT;
_RunThread(frameIP);
return;
}
// For "step out" just set a temporary breakpoint on the return address.
if (action == MSG_THREAD_STEP_OUT) {
status_t error = _InstallTemporaryBreakpoint(frame->ReturnAddress());
if (error != B_OK) {
_StepFallback();
return;
}
fPreviousInstructionPointer = frameIP;
fPreviousFrameAddress = frame->FrameAddress();
fStepMode = STEP_OUT;
_RunThread(frameIP);
return;
}
// For "step in" and "step over" we also need the source code statement at
// the current instruction pointer.
fStepStatement = _GetStatementAtInstructionPointer(frame);
if (fStepStatement == NULL) {
_StepFallback();
return;
}
TRACE_CONTROL(" statement: %#" B_PRIx64 " - %#" B_PRIx64 "\n",
fStepStatement->CoveringAddressRange().Start(),
fStepStatement->CoveringAddressRange().End());
if (action == MSG_THREAD_STEP_INTO) {
// step into
fStepMode = STEP_INTO;
_SingleStepThread(frameIP);
} else {
fPreviousFrameAddress = frame->FrameAddress();
// step over
fStepMode = STEP_OVER;
if (!_DoStepOver(frame->GetCpuState()))
_StepFallback();
}
}
status_t
BreakpointManager::InstallUserBreakpoint(UserBreakpoint* userBreakpoint,
bool enabled)
{
TRACE_CONTROL("BreakpointManager::InstallUserBreakpoint(%p, %d)\n",
userBreakpoint, enabled);
AutoLocker<BLocker> installLocker(fLock);
AutoLocker<Team> teamLocker(fTeam);
bool oldEnabled = userBreakpoint->IsEnabled();
if (userBreakpoint->IsValid() && enabled == oldEnabled) {
TRACE_CONTROL(" user breakpoint already valid and with same enabled "
"state\n");
return B_OK;
}
// get/create the breakpoints for all instances
TRACE_CONTROL(" creating breakpoints for breakpoint instances\n");
status_t error = B_OK;
for (int32 i = 0;
UserBreakpointInstance* instance = userBreakpoint->InstanceAt(i); i++) {
TRACE_CONTROL(" breakpoint instance %p\n", instance);
if (instance->GetBreakpoint() != NULL) {
TRACE_CONTROL(" -> already has breakpoint\n");
continue;
}
target_addr_t address = instance->Address();
Breakpoint* breakpoint = fTeam->BreakpointAtAddress(address);
if (breakpoint == NULL) {
TRACE_CONTROL(" -> no breakpoint at that address yet\n");
Image* image = fTeam->ImageByAddress(address);
if (image == NULL) {
TRACE_CONTROL(" -> no image at that address\n");
error = B_BAD_ADDRESS;
break;
}
breakpoint = new(std::nothrow) Breakpoint(image, address);
if (breakpoint == NULL || !fTeam->AddBreakpoint(breakpoint)) {
delete breakpoint;
error = B_NO_MEMORY;
break;
}
}
TRACE_CONTROL(" -> adding instance to breakpoint %p\n", breakpoint);
breakpoint->AddUserBreakpoint(instance);
instance->SetBreakpoint(breakpoint);
}
// If everything looks good so far mark the user breakpoint according to
// its new state.
if (error == B_OK)
userBreakpoint->SetEnabled(enabled);
// notify user breakpoint listeners
if (error == B_OK)
fTeam->NotifyUserBreakpointChanged(userBreakpoint);
teamLocker.Unlock();
// install/uninstall the breakpoints as needed
TRACE_CONTROL(" updating breakpoints\n");
if (error == B_OK) {
for (int32 i = 0;
UserBreakpointInstance* instance = userBreakpoint->InstanceAt(i);
i++) {
TRACE_CONTROL(" breakpoint instance %p\n", instance);
error = _UpdateBreakpointInstallation(instance->GetBreakpoint());
if (error != B_OK)
break;
}
}
if (error == B_OK) {
TRACE_CONTROL(" success, marking user breakpoint valid\n");
// everything went fine -- mark the user breakpoint valid
if (!userBreakpoint->IsValid()) {
teamLocker.Lock();
userBreakpoint->SetValid(true);
userBreakpoint->AcquireReference();
fTeam->AddUserBreakpoint(userBreakpoint);
fTeam->NotifyUserBreakpointChanged(userBreakpoint);
// notify again -- the breakpoint hadn't been added before
teamLocker.Unlock();
}
} else {
// something went wrong -- revert the situation
TRACE_CONTROL(" error, reverting\n");
teamLocker.Lock();
userBreakpoint->SetEnabled(oldEnabled);
teamLocker.Unlock();
if (!oldEnabled || !userBreakpoint->IsValid()) {
for (int32 i = 0; UserBreakpointInstance* instance
= userBreakpoint->InstanceAt(i);
i++) {
Breakpoint* breakpoint = instance->GetBreakpoint();
if (breakpoint == NULL)
continue;
if (!userBreakpoint->IsValid()) {
instance->SetBreakpoint(NULL);
breakpoint->RemoveUserBreakpoint(instance);
}
_UpdateBreakpointInstallation(breakpoint);
teamLocker.Lock();
if (breakpoint->IsUnused())
fTeam->RemoveBreakpoint(breakpoint);
teamLocker.Unlock();
}
teamLocker.Lock();
fTeam->NotifyUserBreakpointChanged(userBreakpoint);
teamLocker.Unlock();
}
}
installLocker.Unlock();
return error;
}
void
ThreadHandler::HandleThreadAction(uint32 action)
{
AutoLocker<Team> locker(fThread->GetTeam());
if (fThread->State() == THREAD_STATE_UNKNOWN)
return;
// When stop is requested, thread must be running, otherwise stopped.
if (action == MSG_THREAD_STOP
? fThread->State() != THREAD_STATE_RUNNING
: fThread->State() != THREAD_STATE_STOPPED) {
return;
}
// When stepping we need a stack trace. Save it before unsetting the state.
CpuState* cpuState = fThread->GetCpuState();
StackTrace* stackTrace = fThread->GetStackTrace();
Reference<CpuState> cpuStateReference(cpuState);
Reference<StackTrace> stackTraceReference(stackTrace);
// When continuing the thread update thread state before actually issuing
// the command, since we need to unlock.
if (action != MSG_THREAD_STOP) {
_SetThreadState(THREAD_STATE_RUNNING, NULL, THREAD_STOPPED_UNKNOWN,
BString());
}
locker.Unlock();
switch (action) {
case MSG_THREAD_RUN:
fStepMode = STEP_NONE;
_RunThread(0);
return;
case MSG_THREAD_STOP:
fStepMode = STEP_NONE;
fDebuggerInterface->StopThread(ThreadID());
return;
case MSG_THREAD_STEP_OVER:
case MSG_THREAD_STEP_INTO:
case MSG_THREAD_STEP_OUT:
break;
}
TRACE_CONTROL("ThreadHandler::HandleThreadAction(MSG_THREAD_STEP_*)\n");
// We want to step. We need a stack trace for that purpose. If we don't
// have one yet, get it. Start with the CPU state.
if (stackTrace == NULL && cpuState == NULL) {
if (fDebuggerInterface->GetCpuState(fThread->ID(), cpuState) == B_OK)
cpuStateReference.SetTo(cpuState, true);
}
if (stackTrace == NULL && cpuState != NULL) {
if (fDebuggerInterface->GetArchitecture()->CreateStackTrace(
fThread->GetTeam(), this, cpuState, stackTrace) == B_OK) {
stackTraceReference.SetTo(stackTrace, true);
}
}
if (stackTrace == NULL || stackTrace->CountFrames() == 0) {
_StepFallback();
return;
}
StackFrame* frame = stackTrace->FrameAt(0);
TRACE_CONTROL(" ip: %#llx\n", frame->InstructionPointer());
// When the thread is in a syscall, do the same for all step kinds: Stop it
// when it return by means of a breakpoint.
if (frame->Type() == STACK_FRAME_TYPE_SYSCALL) {
// set a breakpoint at the CPU state's instruction pointer (points to
// the return address, unlike the stack frame's instruction pointer)
status_t error = _InstallTemporaryBreakpoint(
frame->GetCpuState()->InstructionPointer());
if (error != B_OK) {
_StepFallback();
return;
}
fStepMode = STEP_OUT;
_RunThread(frame->GetCpuState()->InstructionPointer());
return;
}
// For "step out" just set a temporary breakpoint on the return address.
if (action == MSG_THREAD_STEP_OUT) {
// TODO: That's OK in principle, but needs additional work with recursive
// functions. We need to store some information that allows us to determine
// whether we've actually stepped out of the current frame when we have hit
// the breakpoint.
status_t error = _InstallTemporaryBreakpoint(frame->ReturnAddress());
if (error != B_OK) {
_StepFallback();
return;
}
fStepMode = STEP_OUT;
_RunThread(frame->GetCpuState()->InstructionPointer());
return;
}
// For "step in" and "step over" we also need the source code statement at
// the current instruction pointer.
fStepStatement = _GetStatementAtInstructionPointer(frame);
if (fStepStatement == NULL) {
_StepFallback();
return;
}
TRACE_CONTROL(" statement: %#llx - %#llx\n",
fStepStatement->CoveringAddressRange().Start(),
fStepStatement->CoveringAddressRange().End());
if (action == MSG_THREAD_STEP_INTO) {
// step into
fStepMode = STEP_INTO;
_SingleStepThread(frame->GetCpuState()->InstructionPointer());
} else {
// step over
fStepMode = STEP_OVER;
if (!_DoStepOver(frame->GetCpuState()))
_StepFallback();
}
}
void
TeamDebugger::_HandleSetUserBreakpoint(target_addr_t address, bool enabled)
{
TRACE_CONTROL("TeamDebugger::_HandleSetUserBreakpoint(%#llx, %d)\n",
address, enabled);
// check whether there already is a breakpoint
AutoLocker< ::Team> locker(fTeam);
Breakpoint* breakpoint = fTeam->BreakpointAtAddress(address);
UserBreakpoint* userBreakpoint = NULL;
if (breakpoint != NULL && breakpoint->FirstUserBreakpoint() != NULL)
userBreakpoint = breakpoint->FirstUserBreakpoint()->GetUserBreakpoint();
BReference<UserBreakpoint> userBreakpointReference(userBreakpoint);
if (userBreakpoint == NULL) {
TRACE_CONTROL(" no breakpoint yet\n");
// get the function at the address
Image* image = fTeam->ImageByAddress(address);
TRACE_CONTROL(" image: %p\n", image);
if (image == NULL)
return;
ImageDebugInfo* imageDebugInfo = image->GetImageDebugInfo();
TRACE_CONTROL(" image debug info: %p\n", imageDebugInfo);
if (imageDebugInfo == NULL)
return;
// TODO: Handle this case by loading the debug info, if possible!
FunctionInstance* functionInstance
= imageDebugInfo->FunctionAtAddress(address);
TRACE_CONTROL(" function instance: %p\n", functionInstance);
if (functionInstance == NULL)
return;
Function* function = functionInstance->GetFunction();
TRACE_CONTROL(" function: %p\n", function);
// get the source location for the address
FunctionDebugInfo* functionDebugInfo
= functionInstance->GetFunctionDebugInfo();
SourceLocation sourceLocation;
Statement* breakpointStatement = NULL;
if (functionDebugInfo->GetSpecificImageDebugInfo()->GetStatement(
functionDebugInfo, address, breakpointStatement) != B_OK) {
return;
}
sourceLocation = breakpointStatement->StartSourceLocation();
breakpointStatement->ReleaseReference();
target_addr_t relativeAddress = address - functionInstance->Address();
TRACE_CONTROL(" relative address: %#llx, source location: "
"(%ld, %ld)\n", relativeAddress, sourceLocation.Line(),
sourceLocation.Column());
// get function id
FunctionID* functionID = functionInstance->GetFunctionID();
if (functionID == NULL)
return;
BReference<FunctionID> functionIDReference(functionID, true);
// create the user breakpoint
userBreakpoint = new(std::nothrow) UserBreakpoint(
UserBreakpointLocation(functionID, function->SourceFile(),
sourceLocation, relativeAddress));
if (userBreakpoint == NULL)
return;
userBreakpointReference.SetTo(userBreakpoint, true);
TRACE_CONTROL(" created user breakpoint: %p\n", userBreakpoint);
// iterate through all function instances and create
// UserBreakpointInstances
for (FunctionInstanceList::ConstIterator it
= function->Instances().GetIterator();
FunctionInstance* instance = it.Next();) {
TRACE_CONTROL(" function instance %p: range: %#llx - %#llx\n",
instance, instance->Address(),
instance->Address() + instance->Size());
// get the breakpoint address for the instance
target_addr_t instanceAddress = 0;
if (instance == functionInstance) {
instanceAddress = address;
} else if (functionInstance->SourceFile() != NULL) {
// We have a source file, so get the address for the source
// location.
Statement* statement = NULL;
functionDebugInfo = instance->GetFunctionDebugInfo();
functionDebugInfo->GetSpecificImageDebugInfo()
->GetStatementAtSourceLocation(functionDebugInfo,
sourceLocation, statement);
if (statement != NULL) {
instanceAddress = statement->CoveringAddressRange().Start();
// TODO: What about BreakpointAllowed()?
statement->ReleaseReference();
}
}
TRACE_CONTROL(" breakpoint address using source info: %llx\n",
instanceAddress);
if (instanceAddress == 0) {
// No source file (or we failed getting the statement), so try
// to use the same relative address.
if (relativeAddress > instance->Size())
continue;
instanceAddress = instance->Address() + relativeAddress;
}
TRACE_CONTROL(" final breakpoint address: %llx\n",
instanceAddress);
UserBreakpointInstance* breakpointInstance = new(std::nothrow)
UserBreakpointInstance(userBreakpoint, instanceAddress);
if (breakpointInstance == NULL
|| !userBreakpoint->AddInstance(breakpointInstance)) {
delete breakpointInstance;
return;
}
TRACE_CONTROL(" breakpoint instance: %p\n", breakpointInstance);
}
}
locker.Unlock();
_HandleSetUserBreakpoint(userBreakpoint, enabled);
}
