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//===-- BreakpointSiteList.cpp ----------------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "lldb/Breakpoint/BreakpointSiteList.h"
// C Includes
// C++ Includes
// Other libraries and framework includes
// Project includes
#include "lldb/Core/Stream.h"
#include <algorithm>
using namespace lldb;
using namespace lldb_private;
BreakpointSiteList::BreakpointSiteList() :
m_mutex (Mutex::eMutexTypeRecursive),
m_bp_site_list()
{
}
BreakpointSiteList::~BreakpointSiteList()
{
}
// Add breakpoint site to the list. However, if the element already exists in the
// list, then we don't add it, and return LLDB_INVALID_BREAK_ID.
lldb::break_id_t
BreakpointSiteList::Add(const BreakpointSiteSP &bp)
{
lldb::addr_t bp_site_load_addr = bp->GetLoadAddress();
Mutex::Locker locker(m_mutex);
collection::iterator iter = m_bp_site_list.find (bp_site_load_addr);
if (iter == m_bp_site_list.end())
{
m_bp_site_list.insert (iter, collection::value_type (bp_site_load_addr, bp));
return bp->GetID();
}
else
{
return LLDB_INVALID_BREAK_ID;
}
}
bool
BreakpointSiteList::ShouldStop (StoppointCallbackContext *context, lldb::break_id_t site_id)
{
BreakpointSiteSP site_sp (FindByID (site_id));
if (site_sp)
{
// Let the BreakpointSite decide if it should stop here (could not have
// reached it's target hit count yet, or it could have a callback
// that decided it shouldn't stop (shared library loads/unloads).
return site_sp->ShouldStop (context);
}
// We should stop here since this BreakpointSite isn't valid anymore or it
// doesn't exist.
return true;
}
lldb::break_id_t
BreakpointSiteList::FindIDByAddress (lldb::addr_t addr)
{
BreakpointSiteSP bp = FindByAddress (addr);
if (bp)
{
//DBLogIf(PD_LOG_BREAKPOINTS, "BreakpointSiteList::%s ( addr = 0x%8.8" PRIx64 " ) => %u", __FUNCTION__, (uint64_t)addr, bp->GetID());
return bp.get()->GetID();
}
//DBLogIf(PD_LOG_BREAKPOINTS, "BreakpointSiteList::%s ( addr = 0x%8.8" PRIx64 " ) => NONE", __FUNCTION__, (uint64_t)addr);
return LLDB_INVALID_BREAK_ID;
}
bool
BreakpointSiteList::Remove (lldb::break_id_t break_id)
{
Mutex::Locker locker(m_mutex);
collection::iterator pos = GetIDIterator(break_id); // Predicate
if (pos != m_bp_site_list.end())
{
m_bp_site_list.erase(pos);
return true;
}
return false;
}
bool
BreakpointSiteList::RemoveByAddress (lldb::addr_t address)
{
Mutex::Locker locker(m_mutex);
collection::iterator pos = m_bp_site_list.find(address);
if (pos != m_bp_site_list.end())
{
m_bp_site_list.erase(pos);
return true;
}
return false;
}
class BreakpointSiteIDMatches
{
public:
BreakpointSiteIDMatches (lldb::break_id_t break_id) :
m_break_id(break_id)
{
}
bool operator() (std::pair <lldb::addr_t, BreakpointSiteSP> val_pair) const
{
return m_break_id == val_pair.second.get()->GetID();
}
private:
const lldb::break_id_t m_break_id;
};
BreakpointSiteList::collection::iterator
BreakpointSiteList::GetIDIterator (lldb::break_id_t break_id)
{
Mutex::Locker locker(m_mutex);
return std::find_if(m_bp_site_list.begin(), m_bp_site_list.end(), // Search full range
BreakpointSiteIDMatches(break_id)); // Predicate
}
BreakpointSiteList::collection::const_iterator
BreakpointSiteList::GetIDConstIterator (lldb::break_id_t break_id) const
{
Mutex::Locker locker(m_mutex);
return std::find_if(m_bp_site_list.begin(), m_bp_site_list.end(), // Search full range
BreakpointSiteIDMatches(break_id)); // Predicate
}
BreakpointSiteSP
BreakpointSiteList::FindByID (lldb::break_id_t break_id)
{
Mutex::Locker locker(m_mutex);
BreakpointSiteSP stop_sp;
collection::iterator pos = GetIDIterator(break_id);
if (pos != m_bp_site_list.end())
stop_sp = pos->second;
return stop_sp;
}
const BreakpointSiteSP
BreakpointSiteList::FindByID (lldb::break_id_t break_id) const
{
Mutex::Locker locker(m_mutex);
BreakpointSiteSP stop_sp;
collection::const_iterator pos = GetIDConstIterator(break_id);
if (pos != m_bp_site_list.end())
stop_sp = pos->second;
return stop_sp;
}
BreakpointSiteSP
BreakpointSiteList::FindByAddress (lldb::addr_t addr)
{
BreakpointSiteSP found_sp;
Mutex::Locker locker(m_mutex);
collection::iterator iter = m_bp_site_list.find(addr);
if (iter != m_bp_site_list.end())
found_sp = iter->second;
return found_sp;
}
bool
BreakpointSiteList::BreakpointSiteContainsBreakpoint (lldb::break_id_t bp_site_id, lldb::break_id_t bp_id)
{
Mutex::Locker locker(m_mutex);
collection::const_iterator pos = GetIDConstIterator(bp_site_id);
if (pos != m_bp_site_list.end())
return pos->second->IsBreakpointAtThisSite (bp_id);
return false;
}
void
BreakpointSiteList::Dump (Stream *s) const
{
s->Printf("%p: ", this);
//s->Indent();
s->Printf("BreakpointSiteList with %u BreakpointSites:\n", (uint32_t)m_bp_site_list.size());
s->IndentMore();
collection::const_iterator pos;
collection::const_iterator end = m_bp_site_list.end();
for (pos = m_bp_site_list.begin(); pos != end; ++pos)
pos->second.get()->Dump(s);
s->IndentLess();
}
void
BreakpointSiteList::ForEach (std::function <void(BreakpointSite *)> const &callback)
{
Mutex::Locker locker(m_mutex);
for (auto pair : m_bp_site_list)
callback (pair.second.get());
}
bool
BreakpointSiteList::FindInRange (lldb::addr_t lower_bound, lldb::addr_t upper_bound, BreakpointSiteList &bp_site_list) const
{
if (lower_bound > upper_bound)
return false;
Mutex::Locker locker(m_mutex);
collection::const_iterator lower, upper, pos;
lower = m_bp_site_list.lower_bound(lower_bound);
if (lower == m_bp_site_list.end()
|| (*lower).first >= upper_bound)
return false;
// This is one tricky bit. The breakpoint might overlap the bottom end of the range. So we grab the
// breakpoint prior to the lower bound, and check that that + its byte size isn't in our range.
if (lower != m_bp_site_list.begin())
{
collection::const_iterator prev_pos = lower;
prev_pos--;
const BreakpointSiteSP &prev_bp = (*prev_pos).second;
if (prev_bp->GetLoadAddress() + prev_bp->GetByteSize() > lower_bound)
bp_site_list.Add (prev_bp);
}
upper = m_bp_site_list.upper_bound(upper_bound);
for (pos = lower; pos != upper; pos++)
{
bp_site_list.Add ((*pos).second);
}
return true;
}
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