forked from OSchip/llvm-project
567 lines
15 KiB
C++
567 lines
15 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/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_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 ()
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{
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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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if (new_location)
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*new_location = false;
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BreakpointLocationSP bp_loc_sp (m_locations.FindByAddress(addr));
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if (!bp_loc_sp)
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{
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bp_loc_sp = m_locations.Create (*this, addr);
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if (bp_loc_sp)
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{
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bp_loc_sp->ResolveBreakpointSite();
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if (new_location)
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*new_location = true;
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}
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}
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return bp_loc_sp;
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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 (uint32_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 vrs. 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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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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}
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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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m_options.SetIgnoreCount(n);
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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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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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void
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Breakpoint::SetThreadID (lldb::tid_t thread_id)
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{
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m_options.GetThreadSpec()->SetTID(thread_id);
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}
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lldb::tid_t
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Breakpoint::GetThreadID ()
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{
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if (m_options.GetThreadSpec() == NULL)
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return LLDB_INVALID_THREAD_ID;
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else
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return m_options.GetThreadSpec()->GetTID();
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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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}
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ThreadPlan *
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Breakpoint::GetThreadPlanToTestCondition (ExecutionContext &exe_ctx, lldb::BreakpointLocationSP loc_sp, Stream &error)
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{
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return m_options.GetThreadPlanToTestCondition (exe_ctx, loc_sp, error);
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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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}
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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)
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{
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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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for (size_t i = 0; i < module_list.GetSize(); i++)
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{
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bool seen = false;
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ModuleSP module_sp (module_list.GetModuleAtIndex (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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const Section *section = break_loc->GetAddress().GetSection();
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if (section == NULL || section->GetModule() == module_sp.get())
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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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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.
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// FIXME: Think about this... Maybe it's better to delete the locations?
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// Are we sure that on load-unload-reload the module pointer will remain
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// the same? Or do we need to do an equality on modules that is an
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// "equivalence"???
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for (size_t i = 0; i < module_list.GetSize(); i++)
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{
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ModuleSP module_sp (module_list.GetModuleAtIndex (i));
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if (m_filter_sp->ModulePasses (module_sp))
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{
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const size_t num_locs = m_locations.GetSize();
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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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const Section *section = break_loc->GetAddress().GetSection();
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if (section && section->GetModule() == module_sp.get())
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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->ClearBreakpointSite();
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}
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}
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}
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}
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}
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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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s->Printf("%i: ", GetID());
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GetResolverDescription (s);
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GetFilterDescription (s);
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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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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 = %zu", num_locations);
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if (num_resolved_locations > 0)
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s->Printf(", resolved = %zu", num_resolved_locations);
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}
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else
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{
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s->Printf(", locations = 0 (pending)");
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}
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GetOptions()->GetDescription(s, level);
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if (level == lldb::eDescriptionLevelFull)
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{
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s->IndentLess();
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s->EOL();
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}
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break;
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case lldb::eDescriptionLevelVerbose:
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// Verbose mode does a debug dump of the breakpoint
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Dump (s);
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s->EOL ();
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//s->Indent();
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GetOptions()->GetDescription(s, level);
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break;
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default:
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break;
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}
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// The brief description is just the location name (1.2 or whatever). That's pointless to
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// show in the breakpoint's description, so suppress it.
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if (show_locations && level != lldb::eDescriptionLevelBrief)
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{
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s->IndentMore();
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for (size_t i = 0; i < num_locations; ++i)
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{
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BreakpointLocation *loc = GetLocationAtIndex(i).get();
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loc->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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}
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Breakpoint::BreakpointEventData::BreakpointEventData (BreakpointEventType sub_type,
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BreakpointSP &new_breakpoint_sp) :
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EventData (),
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m_breakpoint_event (sub_type),
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m_new_breakpoint_sp (new_breakpoint_sp)
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{
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}
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Breakpoint::BreakpointEventData::~BreakpointEventData ()
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{
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}
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const ConstString &
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Breakpoint::BreakpointEventData::GetFlavorString ()
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{
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static ConstString g_flavor ("Breakpoint::BreakpointEventData");
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return g_flavor;
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}
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const ConstString &
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Breakpoint::BreakpointEventData::GetFlavor () const
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{
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return BreakpointEventData::GetFlavorString ();
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}
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BreakpointSP &
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Breakpoint::BreakpointEventData::GetBreakpoint ()
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{
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return m_new_breakpoint_sp;
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}
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BreakpointEventType
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Breakpoint::BreakpointEventData::GetBreakpointEventType () const
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{
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return m_breakpoint_event;
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}
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void
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Breakpoint::BreakpointEventData::Dump (Stream *s) const
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{
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}
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Breakpoint::BreakpointEventData *
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Breakpoint::BreakpointEventData::GetEventDataFromEvent (const EventSP &event_sp)
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{
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if (event_sp)
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{
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EventData *event_data = event_sp->GetData();
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if (event_data && event_data->GetFlavor() == BreakpointEventData::GetFlavorString())
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return static_cast <BreakpointEventData *> (event_sp->GetData());
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}
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return NULL;
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}
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BreakpointEventType
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Breakpoint::BreakpointEventData::GetBreakpointEventTypeFromEvent (const EventSP &event_sp)
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{
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BreakpointEventData *data = GetEventDataFromEvent (event_sp);
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if (data == NULL)
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return eBreakpointEventTypeInvalidType;
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else
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return data->GetBreakpointEventType();
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}
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BreakpointSP
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Breakpoint::BreakpointEventData::GetBreakpointFromEvent (const EventSP &event_sp)
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{
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BreakpointSP bp_sp;
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BreakpointEventData *data = GetEventDataFromEvent (event_sp);
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if (data)
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bp_sp = data->GetBreakpoint();
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return bp_sp;
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}
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lldb::BreakpointLocationSP
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Breakpoint::BreakpointEventData::GetBreakpointLocationAtIndexFromEvent (const lldb::EventSP &event_sp, uint32_t bp_loc_idx)
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{
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lldb::BreakpointLocationSP bp_loc_sp;
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BreakpointEventData *data = GetEventDataFromEvent (event_sp);
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if (data)
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{
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Breakpoint *bp = data->GetBreakpoint().get();
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if (bp)
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bp_loc_sp = bp->GetLocationAtIndex(bp_loc_idx);
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}
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return bp_loc_sp;
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}
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void
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Breakpoint::GetResolverDescription (Stream *s)
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{
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if (m_resolver_sp)
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m_resolver_sp->GetDescription (s);
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}
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bool
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Breakpoint::GetMatchingFileLine (const ConstString &filename, uint32_t line_number, BreakpointLocationCollection &loc_coll)
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{
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// TODO: To be correct, this method needs to fill the breakpoint location collection
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// with the location IDs which match the filename and line_number.
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//
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if (m_resolver_sp)
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{
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BreakpointResolverFileLine *resolverFileLine = dyn_cast<BreakpointResolverFileLine>(m_resolver_sp.get());
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if (resolverFileLine &&
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resolverFileLine->m_file_spec.GetFilename() == filename &&
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resolverFileLine->m_line_number == line_number)
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{
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return true;
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}
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}
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return false;
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}
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void
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Breakpoint::GetFilterDescription (Stream *s)
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{
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m_filter_sp->GetDescription (s);
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}
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const BreakpointSP
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Breakpoint::GetSP ()
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{
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// This object contains an instrusive ref count base class so we can
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// easily make a shared pointer to this object
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return BreakpointSP (this);
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}
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