//------------------------------------------------------------------------------
// Name: resume
// Desc:
//------------------------------------------------------------------------------
void DebuggerCore::resume(edb::EVENT_STATUS status) {
// TODO: assert that we are paused
if(attached()) {
if(status != edb::DEBUG_STOP) {
const edb::tid_t tid = active_thread();
const int code = (status == edb::DEBUG_EXCEPTION_NOT_HANDLED) ? resume_code(threads_[tid].status) : 0;
ptrace_continue(tid, code);
// resume the other threads passing the signal they originally reported had
for(auto it = threads_.begin(); it != threads_.end(); ++it) {
if(waited_threads_.contains(it.key())) {
ptrace_continue(it.key(), resume_code(it->status));
}
}
}
}
}
//------------------------------------------------------------------------------
// Name: step
// Desc:
//------------------------------------------------------------------------------
void DebuggerCore::step(edb::EVENT_STATUS status) {
// TODO: assert that we are paused
if(attached()) {
if(status != edb::DEBUG_STOP) {
const edb::tid_t tid = active_thread();
const int code = (status == edb::DEBUG_EXCEPTION_NOT_HANDLED) ? resume_code(threads_[tid].status) : 0;
ptrace(PT_STEP, tid, reinterpret_cast<caddr_t>(1), code);
}
}
}
//------------------------------------------------------------------------------
// Name: resume
// Desc: resumes this thread , passing the signal that stopped it
// (unless the signal was SIGSTOP, or the passed status != DEBUG_EXCEPTION_NOT_HANDLED)
//------------------------------------------------------------------------------
void PlatformThread::resume(edb::EVENT_STATUS status) {
const int code = (status == edb::DEBUG_EXCEPTION_NOT_HANDLED) ? resume_code(status_) : 0;
core_->ptrace_continue(tid_, code);
}
//------------------------------------------------------------------------------
// Name: resume
// Desc: resumes this thread, passing the signal that stopped it
// (unless the signal was SIGSTOP)
//------------------------------------------------------------------------------
void PlatformThread::resume() {
core_->ptrace_continue(tid_, resume_code(status_));
}
//------------------------------------------------------------------------------
// Name: step
// Desc: steps this thread one instruction, passing the signal that stopped it
// (unless the signal was SIGSTOP)
//------------------------------------------------------------------------------
void PlatformThread::step() {
core_->ptrace_step(tid_, resume_code(status_));
}
//------------------------------------------------------------------------------
// Name: handle_event
// Desc:
//------------------------------------------------------------------------------
IDebugEvent::const_pointer DebuggerCore::handle_event(edb::tid_t tid, int status) {
// note that we have waited on this thread
waited_threads_.insert(tid);
// was it a thread exit event?
if(WIFEXITED(status)) {
threads_.remove(tid);
waited_threads_.remove(tid);
// if this was the last thread, return true
// so we report it to the user.
// if this wasn't, then we should silently
// procceed.
if(!threads_.empty()) {
return nullptr;
}
}
// was it a thread create event?
if(is_clone_event(status)) {
unsigned long new_tid;
if(ptrace_get_event_message(tid, &new_tid) != -1) {
const thread_info info = { 0, thread_info::THREAD_STOPPED };
threads_.insert(new_tid, info);
int thread_status = 0;
if(!waited_threads_.contains(new_tid)) {
if(native::waitpid(new_tid, &thread_status, __WALL) > 0) {
waited_threads_.insert(new_tid);
}
}
if(!WIFSTOPPED(thread_status) || WSTOPSIG(thread_status) != SIGSTOP) {
qDebug("[warning] new thread [%d] received an event besides SIGSTOP", static_cast<int>(new_tid));
}
// TODO: what the heck do we do if this isn't a SIGSTOP?
ptrace_continue(new_tid, resume_code(thread_status));
}
ptrace_continue(tid, 0);
return nullptr;
}
// normal event
auto e = std::make_shared<PlatformEvent>();
e->pid_ = pid();
e->tid_ = tid;
e->status_ = status;
if(ptrace_getsiginfo(tid, &e->siginfo_) == -1) {
// TODO: handle no info?
}
active_thread_ = tid;
event_thread_ = tid;
threads_[tid].status = status;
stop_threads();
return e;
}
