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//===-- ThreadPlanStepInRange.cpp -------------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "lldb/Target/ThreadPlanStepInRange.h"
// C Includes
// C++ Includes
// Other libraries and framework includes
// Project includes
#include "lldb/lldb-private-log.h"
#include "lldb/Core/Log.h"
#include "lldb/Core/Stream.h"
#include "lldb/Symbol/Symbol.h"
#include "lldb/Target/Process.h"
#include "lldb/Target/RegisterContext.h"
#include "lldb/Target/Thread.h"
#include "lldb/Target/ThreadPlanStepOut.h"
#include "lldb/Target/ThreadPlanStepThrough.h"
#include "lldb/Core/RegularExpression.h"
using namespace lldb;
using namespace lldb_private;
uint32_t ThreadPlanStepInRange::s_default_flag_values = ThreadPlanShouldStopHere::eAvoidNoDebug;
//----------------------------------------------------------------------
// ThreadPlanStepInRange: Step through a stack range, either stepping over or into
// based on the value of \a type.
//----------------------------------------------------------------------
ThreadPlanStepInRange::ThreadPlanStepInRange
(
Thread &thread,
const AddressRange &range,
const SymbolContext &addr_context,
lldb::RunMode stop_others
) :
ThreadPlanStepRange (ThreadPlan::eKindStepInRange, "Step Range stepping in", thread, range, addr_context, stop_others),
ThreadPlanShouldStopHere (this, ThreadPlanStepInRange::DefaultShouldStopHereCallback, NULL)
{
SetFlagsToDefault ();
// SetAvoidRegexp("^std\\:\\:.*");
}
ThreadPlanStepInRange::~ThreadPlanStepInRange ()
{
}
void
ThreadPlanStepInRange::GetDescription (Stream *s, lldb::DescriptionLevel level)
{
if (level == lldb::eDescriptionLevelBrief)
s->Printf("step in");
else
{
s->Printf ("Stepping through range (stepping into functions): ");
m_address_range.Dump (s, &m_thread.GetProcess(), Address::DumpStyleLoadAddress);
}
}
bool
ThreadPlanStepInRange::ShouldStop (Event *event_ptr)
{
Log *log = lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_STEP);
m_no_more_plans = false;
if (log)
{
StreamString s;
s.Address (m_thread.GetRegisterContext()->GetPC(), m_thread.GetProcess().GetAddressByteSize());
log->Printf("ThreadPlanStepInRange reached %s.", s.GetData());
}
// If we're still in the range, keep going.
if (InRange())
return false;
// If we're in an older frame then we should stop.
if (FrameIsOlder())
return true;
// See if we are in a place we should step through (i.e. a trampoline of some sort):
// One tricky bit here is that some stubs don't push a frame, so we have to check
// both the case of a frame that is younger, or the same as this frame.
// However, if the frame is the same, and we are still in the symbol we started
// in, the we don't need to do this. This first check isn't strictly necessary,
// but it is more efficient.
if (!FrameIsYounger() && InSymbol())
{
SetPlanComplete();
return true;
}
ThreadPlan* new_plan = NULL;
// Stepping through should be done stopping other threads in general, since we're setting a breakpoint and
// continuing...
bool stop_others;
if (m_stop_others != lldb::eAllThreads)
stop_others = true;
else
stop_others = false;
new_plan = m_thread.QueueThreadPlanForStepThrough (false, stop_others);
if (log)
{
if (new_plan != NULL)
log->Printf ("Found a step through plan: %s", new_plan->GetName());
else
log->Printf ("No step through plan found.");
}
// If not, give the "should_stop" callback a chance to push a plan to get us out of here.
// But only do that if we actually have stepped in.
if (!new_plan && FrameIsYounger())
new_plan = InvokeShouldStopHereCallback();
if (new_plan == NULL)
{
m_no_more_plans = true;
SetPlanComplete();
return true;
}
else
{
m_no_more_plans = false;
return false;
}
}
void
ThreadPlanStepInRange::SetFlagsToDefault ()
{
GetFlags().Set(ThreadPlanStepInRange::s_default_flag_values);
}
void
ThreadPlanStepInRange::SetAvoidRegexp(const char *name)
{
if (m_avoid_regexp_ap.get() == NULL)
m_avoid_regexp_ap.reset (new RegularExpression(name));
m_avoid_regexp_ap->Compile (name);
}
void
ThreadPlanStepInRange::SetDefaultFlagValue (uint32_t new_value)
{
// TODO: Should we test this for sanity?
ThreadPlanStepInRange::s_default_flag_values = new_value;
}
bool
ThreadPlanStepInRange::FrameMatchesAvoidRegexp ()
{
StackFrame *frame = GetThread().GetStackFrameAtIndex(0).get();
RegularExpression *avoid_regexp_to_use;
avoid_regexp_to_use = m_avoid_regexp_ap.get();
if (avoid_regexp_to_use == NULL)
avoid_regexp_to_use = GetThread().GetSymbolsToAvoidRegexp();
if (avoid_regexp_to_use != NULL)
{
SymbolContext sc = frame->GetSymbolContext(eSymbolContextSymbol);
if (sc.symbol != NULL)
{
const char *unnamed_symbol = "<UNKNOWN>";
const char *sym_name = sc.symbol->GetMangled().GetName().AsCString(unnamed_symbol);
if (strcmp (sym_name, unnamed_symbol) != 0)
return avoid_regexp_to_use->Execute(sym_name);
}
}
return false;
}
ThreadPlan *
ThreadPlanStepInRange::DefaultShouldStopHereCallback (ThreadPlan *current_plan, Flags &flags, void *baton)
{
bool should_step_out = false;
StackFrame *frame = current_plan->GetThread().GetStackFrameAtIndex(0).get();
if (flags.IsSet(eAvoidNoDebug))
{
if (!frame->HasDebugInformation())
should_step_out = true;
}
if (!should_step_out)
{
if (current_plan->GetKind() == eKindStepInRange)
{
ThreadPlanStepInRange *step_in_range_plan = static_cast<ThreadPlanStepInRange *> (current_plan);
should_step_out = step_in_range_plan->FrameMatchesAvoidRegexp ();
}
}
if (should_step_out)
{
// FIXME: Make sure the ThreadPlanForStepOut does the right thing with inlined functions.
return current_plan->GetThread().QueueThreadPlanForStepOut (false, NULL, true,
current_plan->StopOthers(),
eVoteNo, eVoteNoOpinion);
}
return NULL;
}
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