caio/clang-p2996
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Clean up the usage of "MasterPlan" status in ThreadPlans. Only user-initiated plans

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should be MasterPlans that want to stay on the plan stack.  So make all plans NOT
MasterPlans by default and then have the SB API's and the CommandObjectThread step
commands set this explicitly.

Also added a "clean up" phase to the Thread::ShouldStop so that if plans get stranded
on the stack, we can remove them.  This is done by adding an IsPlanStale method to the
thread plans, and if the plan can know that it is no longer relevant, it returns true,
and the plan and its sub-plans will get discarded.

llvm-svn: 156101
This commit is contained in:
Jim Ingham
2012-05-03 21:19:36 +00:00
parent 60d835fa59
commit 64e7ead1d8
17 changed files with 280 additions and 183 deletions
Download Patch File Download Diff File Expand all files Collapse all files

215
lldb/source/API/SBThread.cpp
View File

@@ -474,6 +474,47 @@ SBThread::GetQueueName () const
return name;
}
SBError
SBThread::ResumeNewPlan (ExecutionContext &exe_ctx, ThreadPlan *new_plan)
{
SBError sb_error;
Process *process = exe_ctx.GetProcessPtr();
if (!process)
{
sb_error.SetErrorString("No process in SBThread::ResumeNewPlan");
return sb_error;
}
Thread *thread = exe_ctx.GetThreadPtr();
if (!thread)
{
sb_error.SetErrorString("No thread in SBThread::ResumeNewPlan");
return sb_error;
}
// User level plans should be Master Plans so they can be interrupted, other plans executed, and
// then a "continue" will resume the plan.
if (new_plan != NULL)
{
new_plan->SetIsMasterPlan(true);
new_plan->SetOkayToDiscard(false);
}
// Why do we need to set the current thread by ID here???
process->GetThreadList().SetSelectedThreadByID (thread->GetID());
sb_error.ref() = process->Resume();
if (sb_error.Success())
{
// If we are doing synchronous mode, then wait for the
// process to stop yet again!
if (process->GetTarget().GetDebugger().GetAsyncExecution () == false)
process->WaitForProcessToStop (NULL);
}
return sb_error;
}
void
SBThread::StepOver (lldb::RunMode stop_other_threads)
@@ -492,39 +533,31 @@ SBThread::StepOver (lldb::RunMode stop_other_threads)
Thread *thread = exe_ctx.GetThreadPtr();
bool abort_other_plans = true;
StackFrameSP frame_sp(thread->GetStackFrameAtIndex (0));
ThreadPlan *new_plan = NULL;
if (frame_sp)
{
if (frame_sp->HasDebugInformation ())
{
SymbolContext sc(frame_sp->GetSymbolContext(eSymbolContextEverything));
thread->QueueThreadPlanForStepRange (abort_other_plans,
eStepTypeOver,
sc.line_entry.range,
sc,
stop_other_threads,
false);
new_plan = thread->QueueThreadPlanForStepRange (abort_other_plans,
eStepTypeOver,
sc.line_entry.range,
sc,
stop_other_threads,
false);
}
else
{
thread->QueueThreadPlanForStepSingleInstruction (true,
abort_other_plans,
stop_other_threads);
new_plan = thread->QueueThreadPlanForStepSingleInstruction (true,
abort_other_plans,
stop_other_threads);
}
}
Process *process = exe_ctx.GetProcessPtr();
// Why do we need to set the current thread by ID here???
process->GetThreadList().SetSelectedThreadByID (thread->GetID());
Error error (process->Resume());
if (error.Success())
{
// If we are doing synchronous mode, then wait for the
// process to stop yet again!
if (process->GetTarget().GetDebugger().GetAsyncExecution () == false)
process->WaitForProcessToStop (NULL);
}
// This returns an error, we should use it!
ResumeNewPlan (exe_ctx, new_plan);
}
}
@@ -545,36 +578,28 @@ SBThread::StepInto (lldb::RunMode stop_other_threads)
Thread *thread = exe_ctx.GetThreadPtr();
StackFrameSP frame_sp(thread->GetStackFrameAtIndex (0));
ThreadPlan *new_plan = NULL;
if (frame_sp && frame_sp->HasDebugInformation ())
{
bool avoid_code_without_debug_info = true;
SymbolContext sc(frame_sp->GetSymbolContext(eSymbolContextEverything));
thread->QueueThreadPlanForStepRange (abort_other_plans,
eStepTypeInto,
sc.line_entry.range,
sc,
stop_other_threads,
avoid_code_without_debug_info);
new_plan = thread->QueueThreadPlanForStepRange (abort_other_plans,
eStepTypeInto,
sc.line_entry.range,
sc,
stop_other_threads,
avoid_code_without_debug_info);
}
else
{
thread->QueueThreadPlanForStepSingleInstruction (false,
abort_other_plans,
stop_other_threads);
}
Process *process = exe_ctx.GetProcessPtr();
// Why do we need to set the current thread by ID here???
process->GetThreadList().SetSelectedThreadByID (thread->GetID());
Error error (process->Resume());
if (error.Success())
{
// If we are doing synchronous mode, then wait for the
// process to stop yet again!
if (process->GetTarget().GetDebugger().GetAsyncExecution () == false)
process->WaitForProcessToStop (NULL);
new_plan = thread->QueueThreadPlanForStepSingleInstruction (false,
abort_other_plans,
stop_other_threads);
}
// This returns an error, we should use it!
ResumeNewPlan (exe_ctx, new_plan);
}
}
@@ -596,24 +621,16 @@ SBThread::StepOut ()
Thread *thread = exe_ctx.GetThreadPtr();
thread->QueueThreadPlanForStepOut (abort_other_plans,
NULL,
false,
stop_other_threads,
eVoteYes,
eVoteNoOpinion,
0);
Process *process = exe_ctx.GetProcessPtr();
process->GetThreadList().SetSelectedThreadByID (thread->GetID());
Error error (process->Resume());
if (error.Success())
{
// If we are doing synchronous mode, then wait for the
// process to stop yet again!
if (process->GetTarget().GetDebugger().GetAsyncExecution () == false)
process->WaitForProcessToStop (NULL);
}
ThreadPlan *new_plan = thread->QueueThreadPlanForStepOut (abort_other_plans,
NULL,
false,
stop_other_threads,
eVoteYes,
eVoteNoOpinion,
0);
// This returns an error, we should use it!
ResumeNewPlan (exe_ctx, new_plan);
}
}
@@ -638,24 +655,16 @@ SBThread::StepOutOfFrame (lldb::SBFrame &sb_frame)
bool stop_other_threads = true;
Thread *thread = exe_ctx.GetThreadPtr();
thread->QueueThreadPlanForStepOut (abort_other_plans,
NULL,
false,
stop_other_threads,
eVoteYes,
eVoteNoOpinion,
frame_sp->GetFrameIndex());
Process *process = exe_ctx.GetProcessPtr();
process->GetThreadList().SetSelectedThreadByID (thread->GetID());
Error error (process->Resume());
if (error.Success())
{
// If we are doing synchronous mode, then wait for the
// process to stop yet again!
if (process->GetTarget().GetDebugger().GetAsyncExecution () == false)
process->WaitForProcessToStop (NULL);
}
ThreadPlan *new_plan = thread->QueueThreadPlanForStepOut (abort_other_plans,
NULL,
false,
stop_other_threads,
eVoteYes,
eVoteNoOpinion,
frame_sp->GetFrameIndex());
// This returns an error, we should use it!
ResumeNewPlan (exe_ctx, new_plan);
}
}
@@ -674,17 +683,10 @@ SBThread::StepInstruction (bool step_over)
{
Mutex::Locker api_locker (exe_ctx.GetTargetPtr()->GetAPIMutex());
Thread *thread = exe_ctx.GetThreadPtr();
Process *process = exe_ctx.GetProcessPtr();
thread->QueueThreadPlanForStepSingleInstruction (step_over, true, true);
process->GetThreadList().SetSelectedThreadByID (thread->GetID());
Error error (process->Resume());
if (error.Success())
{
// If we are doing synchronous mode, then wait for the
// process to stop yet again!
if (process->GetTarget().GetDebugger().GetAsyncExecution () == false)
process->WaitForProcessToStop (NULL);
}
ThreadPlan *new_plan = thread->QueueThreadPlanForStepSingleInstruction (step_over, true, true);
// This returns an error, we should use it!
ResumeNewPlan (exe_ctx, new_plan);
}
}
@@ -707,18 +709,11 @@ SBThread::RunToAddress (lldb::addr_t addr)
Address target_addr (addr);
Thread *thread = exe_ctx.GetThreadPtr();
Process *process = exe_ctx.GetProcessPtr();
thread->QueueThreadPlanForRunToAddress (abort_other_plans, target_addr, stop_other_threads);
process->GetThreadList().SetSelectedThreadByID (thread->GetID());
Error error (process->Resume());
if (error.Success())
{
// If we are doing synchronous mode, then wait for the
// process to stop yet again!
if (process->GetTarget().GetDebugger().GetAsyncExecution () == false)
process->WaitForProcessToStop (NULL);
}
ThreadPlan *new_plan = thread->QueueThreadPlanForRunToAddress (abort_other_plans, target_addr, stop_other_threads);
// This returns an error, we should use it!
ResumeNewPlan (exe_ctx, new_plan);
}
}
@@ -854,23 +849,13 @@ SBThread::StepOverUntil (lldb::SBFrame &sb_frame,
}
else
{
thread->QueueThreadPlanForStepUntil (abort_other_plans,
&step_over_until_addrs[0],
step_over_until_addrs.size(),
stop_other_threads,
frame_sp->GetFrameIndex());
ThreadPlan *new_plan = thread->QueueThreadPlanForStepUntil (abort_other_plans,
&step_over_until_addrs[0],
step_over_until_addrs.size(),
stop_other_threads,
frame_sp->GetFrameIndex());
Process *process = exe_ctx.GetProcessPtr();
process->GetThreadList().SetSelectedThreadByID (thread->GetID());
sb_error.ref() = process->Resume();
if (sb_error->Success())
{
// If we are doing synchronous mode, then wait for the
// process to stop yet again!
if (process->GetTarget().GetDebugger().GetAsyncExecution () == false)
process->WaitForProcessToStop (NULL);
}
sb_error = ResumeNewPlan (exe_ctx, new_plan);
}
}
else