2cad65a595
Added extra logging for stepping. Fixed an issue where cached stack frame data could be lost between runs when the thread plans read a stack frame. llvm-svn: 112973
394 lines
10 KiB
C++
394 lines
10 KiB
C++
//===-- BreakpointLocation.cpp ----------------------------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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// C Includes
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// C++ Includes
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#include <string>
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// Other libraries and framework includes
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// Project includes
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#include "lldb/Breakpoint/BreakpointLocation.h"
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#include "lldb/Breakpoint/BreakpointID.h"
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#include "lldb/Breakpoint/StoppointCallbackContext.h"
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#include "lldb/Core/Log.h"
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#include "lldb/Target/Target.h"
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#include "lldb/Target/Process.h"
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#include "lldb/Core/StreamString.h"
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#include "lldb/lldb-private-log.h"
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#include "lldb/Target/Thread.h"
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#include "lldb/Target/ThreadSpec.h"
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using namespace lldb;
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using namespace lldb_private;
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BreakpointLocation::BreakpointLocation
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(
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break_id_t loc_id,
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Breakpoint &owner,
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Address &addr,
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lldb::tid_t tid,
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bool hardware
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) :
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StoppointLocation (loc_id, addr.GetLoadAddress(owner.GetTarget().GetProcessSP().get()), hardware),
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m_address (addr),
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m_owner (owner),
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m_options_ap (),
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m_bp_site_sp ()
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{
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SetThreadID (tid);
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}
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BreakpointLocation::~BreakpointLocation()
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{
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ClearBreakpointSite();
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}
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lldb::addr_t
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BreakpointLocation::GetLoadAddress () const
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{
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return m_address.GetLoadAddress(m_owner.GetTarget().GetProcessSP().get());
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}
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Address &
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BreakpointLocation::GetAddress ()
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{
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return m_address;
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}
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Breakpoint &
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BreakpointLocation::GetBreakpoint ()
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{
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return m_owner;
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}
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bool
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BreakpointLocation::IsEnabled ()
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{
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if (!m_owner.IsEnabled())
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return false;
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else if (m_options_ap.get() != NULL)
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return m_options_ap->IsEnabled();
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else
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return true;
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}
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void
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BreakpointLocation::SetEnabled (bool enabled)
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{
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GetLocationOptions()->SetEnabled(enabled);
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if (enabled)
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{
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ResolveBreakpointSite();
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}
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else
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{
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ClearBreakpointSite();
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}
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}
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void
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BreakpointLocation::SetThreadID (lldb::tid_t thread_id)
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{
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if (thread_id != LLDB_INVALID_THREAD_ID)
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GetLocationOptions()->SetThreadID(thread_id);
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else
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{
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// If we're resetting this to an invalid thread id, then
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// don't make an options pointer just to do that.
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if (m_options_ap.get() != NULL)
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m_options_ap->SetThreadID (thread_id);
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}
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}
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bool
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BreakpointLocation::InvokeCallback (StoppointCallbackContext *context)
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{
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if (m_options_ap.get() != NULL && m_options_ap->HasCallback())
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return m_options_ap->InvokeCallback (context, m_owner.GetID(), GetID());
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else
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return m_owner.InvokeCallback (context, GetID());
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}
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void
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BreakpointLocation::SetCallback (BreakpointHitCallback callback, void *baton,
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bool is_synchronous)
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{
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// The default "Baton" class will keep a copy of "baton" and won't free
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// or delete it when it goes goes out of scope.
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GetLocationOptions()->SetCallback(callback, BatonSP (new Baton(baton)), is_synchronous);
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}
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void
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BreakpointLocation::SetCallback (BreakpointHitCallback callback, const BatonSP &baton_sp,
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bool is_synchronous)
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{
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GetLocationOptions()->SetCallback (callback, baton_sp, is_synchronous);
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}
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void
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BreakpointLocation::ClearCallback ()
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{
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GetLocationOptions()->ClearCallback();
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}
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uint32_t
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BreakpointLocation::GetIgnoreCount ()
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{
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return GetOptionsNoCreate()->GetIgnoreCount();
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}
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void
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BreakpointLocation::SetIgnoreCount (uint32_t n)
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{
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GetLocationOptions()->SetIgnoreCount(n);
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}
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const BreakpointOptions *
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BreakpointLocation::GetOptionsNoCreate () const
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{
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if (m_options_ap.get() != NULL)
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return m_options_ap.get();
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else
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return m_owner.GetOptions ();
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}
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BreakpointOptions *
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BreakpointLocation::GetLocationOptions ()
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{
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// If we make the copy we don't copy the callbacks because that is potentially
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// expensive and we don't want to do that for the simple case where someone is
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// just disabling the location.
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if (m_options_ap.get() == NULL)
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m_options_ap.reset(BreakpointOptions::CopyOptionsNoCallback(*m_owner.GetOptions ()));
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return m_options_ap.get();
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}
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bool
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BreakpointLocation::ValidForThisThread (Thread *thread)
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{
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return thread->MatchesSpec(GetOptionsNoCreate()->GetThreadSpecNoCreate());
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}
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// RETURNS - true if we should stop at this breakpoint, false if we
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// should continue. Note, we don't check the thread spec for the breakpoint
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// here, since if the breakpoint is not for this thread, then the event won't
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// even get reported, so the check is redundant.
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bool
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BreakpointLocation::ShouldStop (StoppointCallbackContext *context)
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{
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bool should_stop = true;
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m_hit_count++;
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if (!IsEnabled())
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return false;
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if (m_hit_count <= GetIgnoreCount())
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return false;
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// Tell if the callback is synchronous here.
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context->is_synchronous = true;
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should_stop = InvokeCallback (context);
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if (should_stop)
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{
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Log *log = lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_BREAKPOINTS);
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if (log)
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{
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StreamString s;
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GetDescription (&s, lldb::eDescriptionLevelVerbose);
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log->Printf ("Hit breakpoint location: %s\n", s.GetData());
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}
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}
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return should_stop;
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}
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bool
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BreakpointLocation::IsResolved () const
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{
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return m_bp_site_sp.get() != NULL;
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}
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bool
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BreakpointLocation::ResolveBreakpointSite ()
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{
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if (m_bp_site_sp)
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return true;
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Process* process = m_owner.GetTarget().GetProcessSP().get();
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if (process == NULL)
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return false;
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BreakpointLocationSP myself_sp(m_owner.GetLocationSP (this));
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lldb::break_id_t new_id = process->CreateBreakpointSite (myself_sp, false);
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if (new_id == LLDB_INVALID_BREAK_ID)
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{
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Log *log = lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_BREAKPOINTS);
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if (log)
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log->Warning ("Tried to add breakpoint site at 0x%llx but it was already present.\n",
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m_address.GetLoadAddress(process));
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return false;
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}
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return true;
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}
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bool
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BreakpointLocation::SetBreakpointSite (BreakpointSiteSP& bp_site_sp)
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{
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m_bp_site_sp = bp_site_sp;
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return true;
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}
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bool
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BreakpointLocation::ClearBreakpointSite ()
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{
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if (m_bp_site_sp.get())
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{
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m_owner.GetTarget().GetProcessSP()->RemoveOwnerFromBreakpointSite (GetBreakpoint().GetID(),
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GetID(), m_bp_site_sp);
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m_bp_site_sp.reset();
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return true;
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}
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return false;
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}
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void
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BreakpointLocation::GetDescription (Stream *s, lldb::DescriptionLevel level)
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{
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SymbolContext sc;
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s->Indent();
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BreakpointID::GetCanonicalReference(s, m_owner.GetID(), GetID());
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if (level == lldb::eDescriptionLevelBrief)
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return;
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s->PutCString(": ");
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if (level == lldb::eDescriptionLevelVerbose)
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s->IndentMore();
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if (m_address.IsSectionOffset())
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{
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m_address.CalculateSymbolContext(&sc);
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if (level == lldb::eDescriptionLevelFull)
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{
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s->PutCString("where = ");
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sc.DumpStopContext (s, m_owner.GetTarget().GetProcessSP().get(), m_address, false, true, false);
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}
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else
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{
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if (sc.module_sp)
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{
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s->EOL();
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s->Indent("module = ");
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sc.module_sp->GetFileSpec().Dump (s);
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}
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if (sc.comp_unit != NULL)
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{
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s->EOL();
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s->Indent("compile unit = ");
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dynamic_cast<FileSpec*>(sc.comp_unit)->GetFilename().Dump (s);
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if (sc.function != NULL)
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{
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s->EOL();
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s->Indent("function = ");
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s->PutCString (sc.function->GetMangled().GetName().AsCString("<unknown>"));
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}
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if (sc.line_entry.line > 0)
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{
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s->EOL();
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s->Indent("location = ");
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sc.line_entry.DumpStopContext (s, true);
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}
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}
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else
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{
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// If we don't have a comp unit, see if we have a symbol we can print.
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if (sc.symbol)
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{
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s->EOL();
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s->Indent("symbol = ");
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s->PutCString(sc.symbol->GetMangled().GetName().AsCString("<unknown>"));
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}
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}
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}
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}
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if (level == lldb::eDescriptionLevelVerbose)
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{
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s->EOL();
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s->Indent();
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}
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s->Printf ("%saddress = ", (level == lldb::eDescriptionLevelFull && m_address.IsSectionOffset()) ? ", " : "");
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ExecutionContextScope *exe_scope = NULL;
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Target *target = &m_owner.GetTarget();
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if (target)
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exe_scope = target->GetProcessSP().get();
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if (exe_scope == NULL)
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exe_scope = target;
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m_address.Dump(s, exe_scope, Address::DumpStyleLoadAddress, Address::DumpStyleModuleWithFileAddress);
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if (level == lldb::eDescriptionLevelVerbose)
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{
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s->EOL();
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s->Indent();
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s->Printf("resolved = %s\n", IsResolved() ? "true" : "false");
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s->Indent();
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s->Printf ("hit count = %-4u\n", GetHitCount());
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if (m_options_ap.get())
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{
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s->Indent();
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m_options_ap->GetDescription (s, level);
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s->EOL();
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}
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s->IndentLess();
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}
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else
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{
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s->Printf(", %sresolved, hit count = %u ",
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(IsResolved() ? "" : "un"),
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GetHitCount());
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if (m_options_ap.get())
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{
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m_options_ap->GetDescription (s, level);
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}
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}
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}
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void
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BreakpointLocation::Dump(Stream *s) const
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{
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if (s == NULL)
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return;
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s->Printf("BreakpointLocation %u: tid = %4.4x load addr = 0x%8.8llx state = %s type = %s breakpoint "
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"hw_index = %i hit_count = %-4u ignore_count = %-4u",
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GetID(),
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GetOptionsNoCreate()->GetThreadSpecNoCreate()->GetTID(),
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(uint64_t) m_address.GetLoadAddress(m_owner.GetTarget().GetProcessSP().get()),
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(m_options_ap.get() ? m_options_ap->IsEnabled() : m_owner.IsEnabled()) ? "enabled " : "disabled",
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IsHardware() ? "hardware" : "software",
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GetHardwareIndex(),
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GetHitCount(),
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m_options_ap.get() ? m_options_ap->GetIgnoreCount() : m_owner.GetIgnoreCount());
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}
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