Statement*
ThreadHandler::_GetStatementAtInstructionPointer(StackFrame* frame)
{
AutoLocker<Team> locker(fThread->GetTeam());
FunctionInstance* functionInstance = frame->Function();
if (functionInstance == NULL)
return NULL;
FunctionDebugInfo* function = functionInstance->GetFunctionDebugInfo();
// If there's source code attached to the function, we can just get the
// statement.
// SourceCode* sourceCode = function->GetSourceCode();
// if (sourceCode != NULL) {
// Statement* statement = sourceCode->StatementAtAddress(
// frame->InstructionPointer());
// if (statement != NULL)
// statement->AcquireReference();
// return statement;
// }
locker.Unlock();
// We need to get the statement from the debug info of the function.
Statement* statement;
if (function->GetSpecificImageDebugInfo()->GetStatement(function,
frame->InstructionPointer(), statement) != B_OK) {
return NULL;
}
return statement;
}
status_t
Team::GetStatementAtAddress(target_addr_t address, FunctionInstance*& _function,
Statement*& _statement)
{
TRACE_CODE("Team::GetStatementAtAddress(%#" B_PRIx64 ")\n", address);
// get the image at the address
Image* image = ImageByAddress(address);
if (image == NULL) {
TRACE_CODE(" -> no image\n");
return B_ENTRY_NOT_FOUND;
}
ImageDebugInfo* imageDebugInfo = image->GetImageDebugInfo();
if (imageDebugInfo == NULL) {
TRACE_CODE(" -> no image debug info\n");
return B_ENTRY_NOT_FOUND;
}
// get the function
FunctionInstance* functionInstance
= imageDebugInfo->FunctionAtAddress(address);
if (functionInstance == NULL) {
TRACE_CODE(" -> no function instance\n");
return B_ENTRY_NOT_FOUND;
}
// If the function instance has disassembled code attached, we can get the
// statement directly.
if (DisassembledCode* code = functionInstance->GetSourceCode()) {
Statement* statement = code->StatementAtAddress(address);
if (statement == NULL)
return B_ENTRY_NOT_FOUND;
statement->AcquireReference();
_statement = statement;
_function = functionInstance;
return B_OK;
}
// get the statement from the image debug info
FunctionDebugInfo* functionDebugInfo
= functionInstance->GetFunctionDebugInfo();
status_t error = functionDebugInfo->GetSpecificImageDebugInfo()
->GetStatement(functionDebugInfo, address, _statement);
if (error != B_OK) {
TRACE_CODE(" -> no statement from the specific image debug info\n");
return error;
}
_function = functionInstance;
return B_OK;
}
status_t
Team::GetStatementAtSourceLocation(SourceCode* sourceCode,
const SourceLocation& location, Statement*& _statement)
{
TRACE_CODE("Team::GetStatementAtSourceLocation(%p, (%" B_PRId32 ", %"
B_PRId32 "))\n", sourceCode, location.Line(), location.Column());
// If we're lucky the source code can provide us with a statement.
if (DisassembledCode* code = dynamic_cast<DisassembledCode*>(sourceCode)) {
Statement* statement = code->StatementAtLocation(location);
if (statement == NULL)
return B_ENTRY_NOT_FOUND;
statement->AcquireReference();
_statement = statement;
return B_OK;
}
// Go the long and stony way over the source file and the team debug info.
// get the source file for the source code
LocatableFile* sourceFile = sourceCode->GetSourceFile();
if (sourceFile == NULL)
return B_ENTRY_NOT_FOUND;
// get the function at the source location
Function* function = fDebugInfo->FunctionAtSourceLocation(sourceFile,
location);
if (function == NULL)
return B_ENTRY_NOT_FOUND;
// Get some function instance and ask its image debug info to provide us
// with a statement.
FunctionInstance* functionInstance = function->FirstInstance();
if (functionInstance == NULL)
return B_ENTRY_NOT_FOUND;
FunctionDebugInfo* functionDebugInfo
= functionInstance->GetFunctionDebugInfo();
return functionDebugInfo->GetSpecificImageDebugInfo()
->GetStatementAtSourceLocation(functionDebugInfo, location, _statement);
}
status_t
TeamDebugInfo::DisassembleFunction(FunctionInstance* functionInstance,
DisassembledCode*& _sourceCode)
{
// allocate a buffer for the function code
static const target_size_t kMaxBufferSize = 64 * 1024;
target_size_t bufferSize = std::min(functionInstance->Size(),
kMaxBufferSize);
void* buffer = malloc(bufferSize);
if (buffer == NULL)
return B_NO_MEMORY;
MemoryDeleter bufferDeleter(buffer);
// read the function code
FunctionDebugInfo* functionDebugInfo
= functionInstance->GetFunctionDebugInfo();
ssize_t bytesRead = functionDebugInfo->GetSpecificImageDebugInfo()
->ReadCode(functionInstance->Address(), buffer, bufferSize);
if (bytesRead < 0)
return bytesRead;
return fArchitecture->DisassembleCode(functionDebugInfo, buffer, bytesRead,
_sourceCode);
}
status_t
TeamDebugInfo::LoadSourceCode(LocatableFile* file, FileSourceCode*& _sourceCode)
{
AutoLocker<BLocker> locker(fLock);
// If we don't know the source file, there's nothing we can do.
SourceFileEntry* entry = fSourceFiles->Lookup(file);
if (entry == NULL)
return B_ENTRY_NOT_FOUND;
// the source might already be loaded
FileSourceCode* sourceCode = entry->GetSourceCode();
if (sourceCode != NULL) {
sourceCode->AcquireReference();
_sourceCode = sourceCode;
return B_OK;
}
// get the source language from some function's image debug info
Function* function = entry->FunctionAt(0);
if (function == NULL)
return B_ENTRY_NOT_FOUND;
FunctionDebugInfo* functionDebugInfo
= function->FirstInstance()->GetFunctionDebugInfo();
SourceLanguage* language;
status_t error = functionDebugInfo->GetSpecificImageDebugInfo()
->GetSourceLanguage(functionDebugInfo, language);
if (error != B_OK)
return error;
BReference<SourceLanguage> languageReference(language, true);
// no source code yet
// locker.Unlock();
// TODO: It would be nice to unlock here, but we need to iterate through
// the images below. We could clone the list, acquire references, and
// unlock. Then we have to compare the list with the then current list when
// we're done loading.
// load the source file
SourceFile* sourceFile;
error = fFileManager->LoadSourceFile(file, sourceFile);
if (error != B_OK)
return error;
// create the source code
sourceCode = new(std::nothrow) FileSourceCode(file, sourceFile, language);
sourceFile->ReleaseReference();
if (sourceCode == NULL)
return B_NO_MEMORY;
BReference<FileSourceCode> sourceCodeReference(sourceCode, true);
error = sourceCode->Init();
if (error != B_OK)
return error;
// Iterate through all images that know the source file and ask them to add
// information.
bool anyInfo = false;
for (int32 i = 0; ImageDebugInfo* imageDebugInfo = fImages.ItemAt(i); i++)
anyInfo |= imageDebugInfo->AddSourceCodeInfo(file, sourceCode) == B_OK;
if (!anyInfo)
return B_ENTRY_NOT_FOUND;
entry->SetSourceCode(sourceCode);
_sourceCode = sourceCodeReference.Detach();
return B_OK;
}
status_t
Architecture::CreateStackTrace(Team* team,
ImageDebugInfoProvider* imageInfoProvider, CpuState* cpuState,
StackTrace*& _stackTrace, int32 maxStackDepth, bool useExistingTrace)
{
BReference<CpuState> cpuStateReference(cpuState);
StackTrace* stackTrace = NULL;
ObjectDeleter<StackTrace> stackTraceDeleter;
StackFrame* frame = NULL;
if (useExistingTrace)
stackTrace = _stackTrace;
else {
// create the object
stackTrace = new(std::nothrow) StackTrace;
if (stackTrace == NULL)
return B_NO_MEMORY;
stackTraceDeleter.SetTo(stackTrace);
}
// if we're passed an already existing partial stack trace,
// attempt to continue building it from where it left off.
if (stackTrace->CountFrames() > 0) {
frame = stackTrace->FrameAt(stackTrace->CountFrames() - 1);
cpuState = frame->GetCpuState();
}
while (cpuState != NULL) {
// get the instruction pointer
target_addr_t instructionPointer = cpuState->InstructionPointer();
if (instructionPointer == 0)
break;
// get the image for the instruction pointer
AutoLocker<Team> teamLocker(team);
Image* image = team->ImageByAddress(instructionPointer);
BReference<Image> imageReference(image);
teamLocker.Unlock();
// get the image debug info
ImageDebugInfo* imageDebugInfo = NULL;
if (image != NULL)
imageInfoProvider->GetImageDebugInfo(image, imageDebugInfo);
BReference<ImageDebugInfo> imageDebugInfoReference(imageDebugInfo,
true);
// get the function
teamLocker.Lock();
FunctionInstance* function = NULL;
FunctionDebugInfo* functionDebugInfo = NULL;
if (imageDebugInfo != NULL) {
function = imageDebugInfo->FunctionAtAddress(instructionPointer);
if (function != NULL)
functionDebugInfo = function->GetFunctionDebugInfo();
}
BReference<FunctionInstance> functionReference(function);
teamLocker.Unlock();
// If the CPU state's instruction pointer is actually the return address
// of the next frame, we let the architecture fix that.
if (frame != NULL
&& frame->ReturnAddress() == cpuState->InstructionPointer()) {
UpdateStackFrameCpuState(frame, image,
functionDebugInfo, cpuState);
}
// create the frame using the debug info
StackFrame* previousFrame = NULL;
CpuState* previousCpuState = NULL;
if (function != NULL) {
status_t error = functionDebugInfo->GetSpecificImageDebugInfo()
->CreateFrame(image, function, cpuState, previousFrame,
previousCpuState);
if (error != B_OK && error != B_UNSUPPORTED)
break;
}
// If we have no frame yet, let the architecture create it.
if (previousFrame == NULL) {
status_t error = CreateStackFrame(image, functionDebugInfo,
cpuState, frame == NULL, previousFrame, previousCpuState);
if (error != B_OK)
break;
}
cpuStateReference.SetTo(previousCpuState, true);
previousFrame->SetImage(image);
previousFrame->SetFunction(function);
if (!stackTrace->AddFrame(previousFrame)) {
delete previousFrame;
return B_NO_MEMORY;
}
frame = previousFrame;
cpuState = previousCpuState;
if (--maxStackDepth == 0)
break;
}
stackTraceDeleter.Detach();
_stackTrace = stackTrace;
return B_OK;
}
void
BreakpointManager::_UpdateImageBreakpoints(Image* image, bool removeOnly)
{
AutoLocker<BLocker> installLocker(fLock);
AutoLocker<Team> teamLocker(fTeam);
// remove obsolete user breakpoint instances
BObjectList<Breakpoint> breakpointsToUpdate;
for (UserBreakpointList::ConstIterator it
= fTeam->UserBreakpoints().GetIterator();
UserBreakpoint* userBreakpoint = it.Next();) {
int32 instanceCount = userBreakpoint->CountInstances();
for (int32 i = instanceCount - 1; i >= 0; i--) {
UserBreakpointInstance* instance = userBreakpoint->InstanceAt(i);
Breakpoint* breakpoint = instance->GetBreakpoint();
if (breakpoint == NULL || breakpoint->GetImage() != image)
continue;
userBreakpoint->RemoveInstanceAt(i);
breakpoint->RemoveUserBreakpoint(instance);
if (!breakpointsToUpdate.AddItem(breakpoint)) {
_UpdateBreakpointInstallation(breakpoint);
if (breakpoint->IsUnused())
fTeam->RemoveBreakpoint(breakpoint);
}
delete instance;
}
}
// update breakpoints
teamLocker.Unlock();
for (int32 i = 0; Breakpoint* breakpoint = breakpointsToUpdate.ItemAt(i);
i++) {
_UpdateBreakpointInstallation(breakpoint);
}
teamLocker.Lock();
for (int32 i = 0; Breakpoint* breakpoint = breakpointsToUpdate.ItemAt(i);
i++) {
if (breakpoint->IsUnused())
fTeam->RemoveBreakpoint(breakpoint);
}
// add breakpoint instances for function instances in the image (if we have
// an image debug info)
BObjectList<UserBreakpointInstance> newInstances;
ImageDebugInfo* imageDebugInfo = image->GetImageDebugInfo();
if (imageDebugInfo == NULL)
return;
for (UserBreakpointList::ConstIterator it
= fTeam->UserBreakpoints().GetIterator();
UserBreakpoint* userBreakpoint = it.Next();) {
// get the function
Function* function = fTeam->FunctionByID(
userBreakpoint->Location().GetFunctionID());
if (function == NULL)
continue;
const SourceLocation& sourceLocation
= userBreakpoint->Location().GetSourceLocation();
target_addr_t relativeAddress
= userBreakpoint->Location().RelativeAddress();
// iterate through the function instances
for (FunctionInstanceList::ConstIterator it
= function->Instances().GetIterator();
FunctionInstance* functionInstance = it.Next();) {
if (functionInstance->GetImageDebugInfo() != imageDebugInfo)
continue;
// get the breakpoint address for the instance
target_addr_t instanceAddress = 0;
if (functionInstance->SourceFile() != NULL) {
// We have a source file, so get the address for the source
// location.
Statement* statement = NULL;
FunctionDebugInfo* functionDebugInfo
= functionInstance->GetFunctionDebugInfo();
functionDebugInfo->GetSpecificImageDebugInfo()
->GetStatementAtSourceLocation(functionDebugInfo,
sourceLocation, statement);
if (statement != NULL) {
instanceAddress = statement->CoveringAddressRange().Start();
// TODO: What about BreakpointAllowed()?
statement->ReleaseReference();
// TODO: Make sure we do hit the function in question!
}
}
if (instanceAddress == 0) {
// No source file (or we failed getting the statement), so try
// to use the same relative address.
if (relativeAddress > functionInstance->Size())
continue;
instanceAddress = functionInstance->Address() + relativeAddress;
// TODO: Make sure it does at least hit an instruction!
}
// create the user breakpoint instance
UserBreakpointInstance* instance = new(std::nothrow)
UserBreakpointInstance(userBreakpoint, instanceAddress);
if (instance == NULL || !newInstances.AddItem(instance)) {
delete instance;
continue;
}
if (!userBreakpoint->AddInstance(instance)) {
newInstances.RemoveItemAt(newInstances.CountItems() - 1);
delete instance;
}
// get/create the breakpoint for the address
target_addr_t address = instance->Address();
Breakpoint* breakpoint = fTeam->BreakpointAtAddress(address);
if (breakpoint == NULL) {
breakpoint = new(std::nothrow) Breakpoint(image, address);
if (breakpoint == NULL || !fTeam->AddBreakpoint(breakpoint)) {
delete breakpoint;
break;
}
}
breakpoint->AddUserBreakpoint(instance);
instance->SetBreakpoint(breakpoint);
}
}
// install the breakpoints for the new user breakpoint instances
teamLocker.Unlock();
for (int32 i = 0; UserBreakpointInstance* instance = newInstances.ItemAt(i);
i++) {
Breakpoint* breakpoint = instance->GetBreakpoint();
if (breakpoint == NULL
|| _UpdateBreakpointInstallation(breakpoint) != B_OK) {
// something went wrong -- remove the instance
teamLocker.Lock();
instance->GetUserBreakpoint()->RemoveInstance(instance);
if (breakpoint != NULL) {
breakpoint->AddUserBreakpoint(instance);
if (breakpoint->IsUnused())
fTeam->RemoveBreakpoint(breakpoint);
}
teamLocker.Unlock();
}
}
}
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);
}
