forked from OSchip/llvm-project
795 lines
23 KiB
C++
795 lines
23 KiB
C++
//===-- Breakpoint.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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// Other libraries and framework includes
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// Project includes
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#include "lldb/Core/Address.h"
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#include "lldb/Breakpoint/Breakpoint.h"
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#include "lldb/Breakpoint/BreakpointLocation.h"
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#include "lldb/Breakpoint/BreakpointLocationCollection.h"
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#include "lldb/Breakpoint/BreakpointResolver.h"
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#include "lldb/Breakpoint/BreakpointResolverFileLine.h"
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#include "lldb/Core/Log.h"
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#include "lldb/Core/ModuleList.h"
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#include "lldb/Core/SearchFilter.h"
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#include "lldb/Core/Section.h"
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#include "lldb/Core/Stream.h"
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#include "lldb/Core/StreamString.h"
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#include "lldb/Symbol/SymbolContext.h"
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#include "lldb/Target/Target.h"
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#include "lldb/Target/ThreadSpec.h"
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#include "lldb/lldb-private-log.h"
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#include "llvm/Support/Casting.h"
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using namespace lldb;
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using namespace lldb_private;
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using namespace llvm;
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const ConstString &
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Breakpoint::GetEventIdentifier ()
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{
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static ConstString g_identifier("event-identifier.breakpoint.changed");
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return g_identifier;
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}
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//----------------------------------------------------------------------
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// Breakpoint constructor
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//----------------------------------------------------------------------
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Breakpoint::Breakpoint(Target &target, SearchFilterSP &filter_sp, BreakpointResolverSP &resolver_sp) :
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m_being_created(true),
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m_target (target),
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m_filter_sp (filter_sp),
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m_resolver_sp (resolver_sp),
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m_options (),
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m_locations (*this)
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{
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m_being_created = false;
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}
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//----------------------------------------------------------------------
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// Destructor
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//----------------------------------------------------------------------
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Breakpoint::~Breakpoint()
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{
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}
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bool
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Breakpoint::IsInternal () const
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{
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return LLDB_BREAK_ID_IS_INTERNAL(m_bid);
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}
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Target&
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Breakpoint::GetTarget ()
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{
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return m_target;
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}
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const Target&
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Breakpoint::GetTarget () const
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{
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return m_target;
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}
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BreakpointLocationSP
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Breakpoint::AddLocation (const Address &addr, bool *new_location)
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{
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return m_locations.AddLocation (addr, new_location);
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}
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BreakpointLocationSP
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Breakpoint::FindLocationByAddress (const Address &addr)
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{
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return m_locations.FindByAddress(addr);
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}
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break_id_t
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Breakpoint::FindLocationIDByAddress (const Address &addr)
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{
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return m_locations.FindIDByAddress(addr);
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}
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BreakpointLocationSP
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Breakpoint::FindLocationByID (break_id_t bp_loc_id)
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{
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return m_locations.FindByID(bp_loc_id);
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}
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BreakpointLocationSP
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Breakpoint::GetLocationAtIndex (size_t index)
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{
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return m_locations.GetByIndex(index);
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}
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// For each of the overall options we need to decide how they propagate to
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// the location options. This will determine the precedence of options on
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// the breakpoint vs. its locations.
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// Disable at the breakpoint level should override the location settings.
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// That way you can conveniently turn off a whole breakpoint without messing
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// up the individual settings.
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void
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Breakpoint::SetEnabled (bool enable)
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{
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if (enable == m_options.IsEnabled())
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return;
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m_options.SetEnabled(enable);
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if (enable)
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m_locations.ResolveAllBreakpointSites();
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else
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m_locations.ClearAllBreakpointSites();
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SendBreakpointChangedEvent (enable ? eBreakpointEventTypeEnabled : eBreakpointEventTypeDisabled);
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}
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bool
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Breakpoint::IsEnabled ()
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{
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return m_options.IsEnabled();
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}
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void
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Breakpoint::SetIgnoreCount (uint32_t n)
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{
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if (m_options.GetIgnoreCount() == n)
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return;
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m_options.SetIgnoreCount(n);
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SendBreakpointChangedEvent (eBreakpointEventTypeIgnoreChanged);
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}
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void
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Breakpoint::DecrementIgnoreCount ()
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{
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uint32_t ignore = m_options.GetIgnoreCount();
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if (ignore != 0)
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m_options.SetIgnoreCount(ignore - 1);
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}
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uint32_t
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Breakpoint::GetIgnoreCount () const
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{
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return m_options.GetIgnoreCount();
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}
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bool
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Breakpoint::IgnoreCountShouldStop ()
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{
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uint32_t ignore = GetIgnoreCount();
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if (ignore != 0)
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{
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// When we get here we know the location that caused the stop doesn't have an ignore count,
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// since by contract we call it first... So we don't have to find & decrement it, we only have
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// to decrement our own ignore count.
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DecrementIgnoreCount();
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return false;
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}
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else
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return true;
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}
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uint32_t
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Breakpoint::GetHitCount () const
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{
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return m_locations.GetHitCount();
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}
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bool
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Breakpoint::IsOneShot () const
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{
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return m_options.IsOneShot();
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}
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void
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Breakpoint::SetOneShot (bool one_shot)
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{
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m_options.SetOneShot (one_shot);
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}
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void
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Breakpoint::SetThreadID (lldb::tid_t thread_id)
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{
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if (m_options.GetThreadSpec()->GetTID() == thread_id)
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return;
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m_options.GetThreadSpec()->SetTID(thread_id);
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SendBreakpointChangedEvent (eBreakpointEventTypeThreadChanged);
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}
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lldb::tid_t
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Breakpoint::GetThreadID () const
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{
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if (m_options.GetThreadSpecNoCreate() == NULL)
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return LLDB_INVALID_THREAD_ID;
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else
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return m_options.GetThreadSpecNoCreate()->GetTID();
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}
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void
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Breakpoint::SetThreadIndex (uint32_t index)
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{
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if (m_options.GetThreadSpec()->GetIndex() == index)
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return;
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m_options.GetThreadSpec()->SetIndex(index);
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SendBreakpointChangedEvent (eBreakpointEventTypeThreadChanged);
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}
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uint32_t
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Breakpoint::GetThreadIndex() const
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{
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if (m_options.GetThreadSpecNoCreate() == NULL)
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return 0;
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else
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return m_options.GetThreadSpecNoCreate()->GetIndex();
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}
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void
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Breakpoint::SetThreadName (const char *thread_name)
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{
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if (m_options.GetThreadSpec()->GetName() != NULL
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&& ::strcmp (m_options.GetThreadSpec()->GetName(), thread_name) == 0)
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return;
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m_options.GetThreadSpec()->SetName (thread_name);
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SendBreakpointChangedEvent (eBreakpointEventTypeThreadChanged);
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}
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const char *
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Breakpoint::GetThreadName () const
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{
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if (m_options.GetThreadSpecNoCreate() == NULL)
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return NULL;
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else
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return m_options.GetThreadSpecNoCreate()->GetName();
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}
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void
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Breakpoint::SetQueueName (const char *queue_name)
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{
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if (m_options.GetThreadSpec()->GetQueueName() != NULL
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&& ::strcmp (m_options.GetThreadSpec()->GetQueueName(), queue_name) == 0)
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return;
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m_options.GetThreadSpec()->SetQueueName (queue_name);
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SendBreakpointChangedEvent (eBreakpointEventTypeThreadChanged);
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}
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const char *
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Breakpoint::GetQueueName () const
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{
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if (m_options.GetThreadSpecNoCreate() == NULL)
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return NULL;
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else
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return m_options.GetThreadSpecNoCreate()->GetQueueName();
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}
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void
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Breakpoint::SetCondition (const char *condition)
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{
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m_options.SetCondition (condition);
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SendBreakpointChangedEvent (eBreakpointEventTypeConditionChanged);
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}
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const char *
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Breakpoint::GetConditionText () const
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{
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return m_options.GetConditionText();
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}
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// This function is used when "baton" doesn't need to be freed
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void
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Breakpoint::SetCallback (BreakpointHitCallback callback, void *baton, 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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m_options.SetCallback(callback, BatonSP (new Baton(baton)), is_synchronous);
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SendBreakpointChangedEvent (eBreakpointEventTypeCommandChanged);
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}
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// This function is used when a baton needs to be freed and therefore is
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// contained in a "Baton" subclass.
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void
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Breakpoint::SetCallback (BreakpointHitCallback callback, const BatonSP &callback_baton_sp, bool is_synchronous)
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{
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m_options.SetCallback(callback, callback_baton_sp, is_synchronous);
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}
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void
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Breakpoint::ClearCallback ()
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{
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m_options.ClearCallback ();
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}
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bool
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Breakpoint::InvokeCallback (StoppointCallbackContext *context, break_id_t bp_loc_id)
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{
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return m_options.InvokeCallback (context, GetID(), bp_loc_id);
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}
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BreakpointOptions *
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Breakpoint::GetOptions ()
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{
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return &m_options;
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}
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void
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Breakpoint::ResolveBreakpoint ()
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{
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if (m_resolver_sp)
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m_resolver_sp->ResolveBreakpoint(*m_filter_sp);
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}
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void
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Breakpoint::ResolveBreakpointInModules (ModuleList &module_list)
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{
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if (m_resolver_sp)
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m_resolver_sp->ResolveBreakpointInModules(*m_filter_sp, module_list);
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}
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void
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Breakpoint::ClearAllBreakpointSites ()
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{
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m_locations.ClearAllBreakpointSites();
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}
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//----------------------------------------------------------------------
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// ModulesChanged: Pass in a list of new modules, and
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//----------------------------------------------------------------------
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void
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Breakpoint::ModulesChanged (ModuleList &module_list, bool load, bool delete_locations)
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{
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Mutex::Locker modules_mutex(module_list.GetMutex());
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if (load)
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{
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// The logic for handling new modules is:
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// 1) If the filter rejects this module, then skip it.
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// 2) Run through the current location list and if there are any locations
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// for that module, we mark the module as "seen" and we don't try to re-resolve
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// breakpoint locations for that module.
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// However, we do add breakpoint sites to these locations if needed.
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// 3) If we don't see this module in our breakpoint location list, call ResolveInModules.
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ModuleList new_modules; // We'll stuff the "unseen" modules in this list, and then resolve
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// them after the locations pass. Have to do it this way because
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// resolving breakpoints will add new locations potentially.
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const size_t num_locs = m_locations.GetSize();
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size_t num_modules = module_list.GetSize();
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for (size_t i = 0; i < num_modules; i++)
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{
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bool seen = false;
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ModuleSP module_sp (module_list.GetModuleAtIndexUnlocked (i));
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if (!m_filter_sp->ModulePasses (module_sp))
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continue;
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for (size_t loc_idx = 0; loc_idx < num_locs; loc_idx++)
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{
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BreakpointLocationSP break_loc = m_locations.GetByIndex(loc_idx);
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if (!break_loc->IsEnabled())
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continue;
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SectionSP section_sp (break_loc->GetAddress().GetSection());
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if (!section_sp || section_sp->GetModule() == module_sp)
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{
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if (!seen)
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seen = true;
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if (!break_loc->ResolveBreakpointSite())
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{
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LogSP log (lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_BREAKPOINTS));
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if (log)
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log->Printf ("Warning: could not set breakpoint site for breakpoint location %d of breakpoint %d.\n",
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break_loc->GetID(), GetID());
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}
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}
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}
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if (!seen)
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new_modules.AppendIfNeeded (module_sp);
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}
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if (new_modules.GetSize() > 0)
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{
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// If this is not an internal breakpoint, set up to record the new locations, then dispatch
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// an event with the new locations.
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if (!IsInternal())
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{
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BreakpointEventData *new_locations_event = new BreakpointEventData (eBreakpointEventTypeLocationsAdded,
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shared_from_this());
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m_locations.StartRecordingNewLocations(new_locations_event->GetBreakpointLocationCollection());
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ResolveBreakpointInModules(new_modules);
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m_locations.StopRecordingNewLocations();
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if (new_locations_event->GetBreakpointLocationCollection().GetSize() != 0)
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{
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SendBreakpointChangedEvent (new_locations_event);
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}
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else
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delete new_locations_event;
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}
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else
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ResolveBreakpointInModules(new_modules);
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}
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}
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else
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{
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// Go through the currently set locations and if any have breakpoints in
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// the module list, then remove their breakpoint sites, and their locations if asked to.
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BreakpointEventData *removed_locations_event;
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if (!IsInternal())
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removed_locations_event = new BreakpointEventData (eBreakpointEventTypeLocationsRemoved,
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shared_from_this());
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else
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removed_locations_event = NULL;
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size_t num_modules = module_list.GetSize();
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for (size_t i = 0; i < num_modules; i++)
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{
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ModuleSP module_sp (module_list.GetModuleAtIndexUnlocked (i));
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if (m_filter_sp->ModulePasses (module_sp))
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{
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size_t loc_idx = 0;
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size_t num_locations = m_locations.GetSize();
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BreakpointLocationCollection locations_to_remove;
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for (loc_idx = 0; loc_idx < num_locations; loc_idx++)
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{
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BreakpointLocationSP break_loc_sp (m_locations.GetByIndex(loc_idx));
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SectionSP section_sp (break_loc_sp->GetAddress().GetSection());
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if (section_sp && section_sp->GetModule() == module_sp)
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{
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// Remove this breakpoint since the shared library is
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// unloaded, but keep the breakpoint location around
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// so we always get complete hit count and breakpoint
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// lifetime info
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break_loc_sp->ClearBreakpointSite();
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if (removed_locations_event)
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{
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removed_locations_event->GetBreakpointLocationCollection().Add(break_loc_sp);
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}
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if (delete_locations)
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locations_to_remove.Add (break_loc_sp);
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}
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}
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if (delete_locations)
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{
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size_t num_locations_to_remove = locations_to_remove.GetSize();
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for (loc_idx = 0; loc_idx < num_locations_to_remove; loc_idx++)
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m_locations.RemoveLocation (locations_to_remove.GetByIndex(loc_idx));
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}
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}
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}
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SendBreakpointChangedEvent (removed_locations_event);
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}
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}
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void
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Breakpoint::ModuleReplaced (ModuleSP old_module_sp, ModuleSP new_module_sp)
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{
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ModuleList temp_list;
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temp_list.Append (new_module_sp);
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ModulesChanged (temp_list, true);
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// TO DO: For now I'm just adding locations for the new module and removing the
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// breakpoint locations that were in the old module.
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// We should really go find the ones that are in the new module & if we can determine that they are "equivalent"
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// carry over the options from the old location to the new.
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temp_list.Clear();
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temp_list.Append (old_module_sp);
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ModulesChanged (temp_list, false, true);
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}
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void
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Breakpoint::Dump (Stream *)
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{
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}
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size_t
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Breakpoint::GetNumResolvedLocations() const
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{
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// Return the number of breakpoints that are actually resolved and set
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// down in the inferior process.
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return m_locations.GetNumResolvedLocations();
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}
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size_t
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Breakpoint::GetNumLocations() const
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{
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return m_locations.GetSize();
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}
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void
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Breakpoint::GetDescription (Stream *s, lldb::DescriptionLevel level, bool show_locations)
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{
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assert (s != NULL);
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if (!m_kind_description.empty())
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{
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if (eDescriptionLevelBrief)
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{
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s->PutCString (GetBreakpointKind());
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return;
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}
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else
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s->Printf("Kind: %s\n", GetBreakpointKind ());
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}
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const size_t num_locations = GetNumLocations ();
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const size_t num_resolved_locations = GetNumResolvedLocations ();
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// They just made the breakpoint, they don't need to be told HOW they made it...
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// Also, we'll print the breakpoint number differently depending on whether there is 1 or more locations.
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if (level != eDescriptionLevelInitial)
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{
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s->Printf("%i: ", GetID());
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GetResolverDescription (s);
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GetFilterDescription (s);
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}
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switch (level)
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{
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case lldb::eDescriptionLevelBrief:
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case lldb::eDescriptionLevelFull:
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if (num_locations > 0)
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{
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s->Printf(", locations = %" PRIu64, (uint64_t)num_locations);
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if (num_resolved_locations > 0)
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s->Printf(", resolved = %" PRIu64, (uint64_t)num_resolved_locations);
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}
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else
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|
{
|
|
// Don't print the pending notification for exception resolvers since we don't generally
|
|
// know how to set them until the target is run.
|
|
if (m_resolver_sp->getResolverID() != BreakpointResolver::ExceptionResolver)
|
|
s->Printf(", locations = 0 (pending)");
|
|
}
|
|
|
|
GetOptions()->GetDescription(s, level);
|
|
|
|
if (level == lldb::eDescriptionLevelFull)
|
|
{
|
|
s->IndentLess();
|
|
s->EOL();
|
|
}
|
|
break;
|
|
|
|
case lldb::eDescriptionLevelInitial:
|
|
s->Printf ("Breakpoint %i: ", GetID());
|
|
if (num_locations == 0)
|
|
{
|
|
s->Printf ("no locations (pending).");
|
|
}
|
|
else if (num_locations == 1)
|
|
{
|
|
// If there is one location only, we'll just print that location information. But don't do this if
|
|
// show locations is true, then that will be handled below.
|
|
if (show_locations == false)
|
|
{
|
|
GetLocationAtIndex(0)->GetDescription(s, level);
|
|
}
|
|
else
|
|
{
|
|
s->Printf ("%zd locations.", num_locations);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
s->Printf ("%zd locations.", num_locations);
|
|
}
|
|
s->EOL();
|
|
break;
|
|
case lldb::eDescriptionLevelVerbose:
|
|
// Verbose mode does a debug dump of the breakpoint
|
|
Dump (s);
|
|
s->EOL ();
|
|
//s->Indent();
|
|
GetOptions()->GetDescription(s, level);
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
|
|
// The brief description is just the location name (1.2 or whatever). That's pointless to
|
|
// show in the breakpoint's description, so suppress it.
|
|
if (show_locations && level != lldb::eDescriptionLevelBrief)
|
|
{
|
|
s->IndentMore();
|
|
for (size_t i = 0; i < num_locations; ++i)
|
|
{
|
|
BreakpointLocation *loc = GetLocationAtIndex(i).get();
|
|
loc->GetDescription(s, level);
|
|
s->EOL();
|
|
}
|
|
s->IndentLess();
|
|
}
|
|
}
|
|
|
|
void
|
|
Breakpoint::GetResolverDescription (Stream *s)
|
|
{
|
|
if (m_resolver_sp)
|
|
m_resolver_sp->GetDescription (s);
|
|
}
|
|
|
|
|
|
bool
|
|
Breakpoint::GetMatchingFileLine (const ConstString &filename, uint32_t line_number, BreakpointLocationCollection &loc_coll)
|
|
{
|
|
// TODO: To be correct, this method needs to fill the breakpoint location collection
|
|
// with the location IDs which match the filename and line_number.
|
|
//
|
|
|
|
if (m_resolver_sp)
|
|
{
|
|
BreakpointResolverFileLine *resolverFileLine = dyn_cast<BreakpointResolverFileLine>(m_resolver_sp.get());
|
|
if (resolverFileLine &&
|
|
resolverFileLine->m_file_spec.GetFilename() == filename &&
|
|
resolverFileLine->m_line_number == line_number)
|
|
{
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
void
|
|
Breakpoint::GetFilterDescription (Stream *s)
|
|
{
|
|
m_filter_sp->GetDescription (s);
|
|
}
|
|
|
|
void
|
|
Breakpoint::SendBreakpointChangedEvent (lldb::BreakpointEventType eventKind)
|
|
{
|
|
if (!m_being_created
|
|
&& !IsInternal()
|
|
&& GetTarget().EventTypeHasListeners(Target::eBroadcastBitBreakpointChanged))
|
|
{
|
|
BreakpointEventData *data = new Breakpoint::BreakpointEventData (eventKind, shared_from_this());
|
|
|
|
GetTarget().BroadcastEvent (Target::eBroadcastBitBreakpointChanged, data);
|
|
}
|
|
}
|
|
|
|
void
|
|
Breakpoint::SendBreakpointChangedEvent (BreakpointEventData *data)
|
|
{
|
|
|
|
if (data == NULL)
|
|
return;
|
|
|
|
if (!m_being_created
|
|
&& !IsInternal()
|
|
&& GetTarget().EventTypeHasListeners(Target::eBroadcastBitBreakpointChanged))
|
|
GetTarget().BroadcastEvent (Target::eBroadcastBitBreakpointChanged, data);
|
|
else
|
|
delete data;
|
|
}
|
|
|
|
Breakpoint::BreakpointEventData::BreakpointEventData (BreakpointEventType sub_type,
|
|
const BreakpointSP &new_breakpoint_sp) :
|
|
EventData (),
|
|
m_breakpoint_event (sub_type),
|
|
m_new_breakpoint_sp (new_breakpoint_sp)
|
|
{
|
|
}
|
|
|
|
Breakpoint::BreakpointEventData::~BreakpointEventData ()
|
|
{
|
|
}
|
|
|
|
const ConstString &
|
|
Breakpoint::BreakpointEventData::GetFlavorString ()
|
|
{
|
|
static ConstString g_flavor ("Breakpoint::BreakpointEventData");
|
|
return g_flavor;
|
|
}
|
|
|
|
const ConstString &
|
|
Breakpoint::BreakpointEventData::GetFlavor () const
|
|
{
|
|
return BreakpointEventData::GetFlavorString ();
|
|
}
|
|
|
|
|
|
BreakpointSP &
|
|
Breakpoint::BreakpointEventData::GetBreakpoint ()
|
|
{
|
|
return m_new_breakpoint_sp;
|
|
}
|
|
|
|
BreakpointEventType
|
|
Breakpoint::BreakpointEventData::GetBreakpointEventType () const
|
|
{
|
|
return m_breakpoint_event;
|
|
}
|
|
|
|
void
|
|
Breakpoint::BreakpointEventData::Dump (Stream *s) const
|
|
{
|
|
}
|
|
|
|
const Breakpoint::BreakpointEventData *
|
|
Breakpoint::BreakpointEventData::GetEventDataFromEvent (const Event *event)
|
|
{
|
|
if (event)
|
|
{
|
|
const EventData *event_data = event->GetData();
|
|
if (event_data && event_data->GetFlavor() == BreakpointEventData::GetFlavorString())
|
|
return static_cast <const BreakpointEventData *> (event->GetData());
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
BreakpointEventType
|
|
Breakpoint::BreakpointEventData::GetBreakpointEventTypeFromEvent (const EventSP &event_sp)
|
|
{
|
|
const BreakpointEventData *data = GetEventDataFromEvent (event_sp.get());
|
|
|
|
if (data == NULL)
|
|
return eBreakpointEventTypeInvalidType;
|
|
else
|
|
return data->GetBreakpointEventType();
|
|
}
|
|
|
|
BreakpointSP
|
|
Breakpoint::BreakpointEventData::GetBreakpointFromEvent (const EventSP &event_sp)
|
|
{
|
|
BreakpointSP bp_sp;
|
|
|
|
const BreakpointEventData *data = GetEventDataFromEvent (event_sp.get());
|
|
if (data)
|
|
bp_sp = data->m_new_breakpoint_sp;
|
|
|
|
return bp_sp;
|
|
}
|
|
|
|
size_t
|
|
Breakpoint::BreakpointEventData::GetNumBreakpointLocationsFromEvent (const EventSP &event_sp)
|
|
{
|
|
const BreakpointEventData *data = GetEventDataFromEvent (event_sp.get());
|
|
if (data)
|
|
return data->m_locations.GetSize();
|
|
|
|
return 0;
|
|
}
|
|
|
|
lldb::BreakpointLocationSP
|
|
Breakpoint::BreakpointEventData::GetBreakpointLocationAtIndexFromEvent (const lldb::EventSP &event_sp, uint32_t bp_loc_idx)
|
|
{
|
|
lldb::BreakpointLocationSP bp_loc_sp;
|
|
|
|
const BreakpointEventData *data = GetEventDataFromEvent (event_sp.get());
|
|
if (data)
|
|
{
|
|
bp_loc_sp = data->m_locations.GetByIndex(bp_loc_idx);
|
|
}
|
|
|
|
return bp_loc_sp;
|
|
}
|