lldb/source/Breakpoint/WatchpointLocation.cpp

//===-- WatchpointLocation.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/WatchpointLocation.h"

// C Includes
// C++ Includes
// Other libraries and framework includes
// Project includes
#include "lldb/Core/Stream.h"

using namespace lldb;
using namespace lldb_private;

WatchpointLocation::WatchpointLocation (lldb::addr_t addr, lldb::tid_t tid, bool hardware) :
    StoppointLocation (GetNextID(), addr, tid, hardware),
    m_enabled(0),
    m_watch_read(0),
    m_watch_write(0),
    m_watch_was_read(0),
    m_watch_was_written(0),
    m_ignore_count(0),
    m_callback(NULL),
    m_callback_baton(NULL)
{
}

WatchpointLocation::~WatchpointLocation()
{
}

break_id_t
WatchpointLocation::GetNextID()
{
    static break_id_t g_next_ID = 0;
    return ++g_next_ID;
}

bool
WatchpointLocation::SetCallback (WatchpointHitCallback callback, void *callback_baton)
{
    m_callback = callback;
    m_callback_baton = callback_baton;
    return true;
}


// RETURNS - true if we should stop at this breakpoint, false if we
// should continue.

bool
WatchpointLocation::BreakpointWasHit (StoppointCallbackContext *context)
{
    m_hit_count++;

    if (m_hit_count > m_ignore_count)
    {
        uint32_t access = 0;
        if (m_watch_was_read)
            access |= LLDB_WATCH_TYPE_READ;
        if (m_watch_was_written)
            access |= LLDB_WATCH_TYPE_WRITE;
        return m_callback(m_callback_baton, context, GetID(), access);
    }
    return false;
}

void
WatchpointLocation::Dump(Stream *s) const
{
    if (s == NULL)
        return;

    s->Printf("WatchpointLocation %u: tid = %4.4x  addr = 0x%8.8llx  size = %zu  state = %s  type = %s watchpoint (%s%s)  hw_index = %i  hit_count = %-4u  ignore_count = %-4u  callback = %8p baton = %8p",
            GetID(),
            (uint64_t)m_addr,
            m_byte_size,
            m_enabled ? "enabled " : "disabled",
            IsHardware() ? "hardware" : "software",
            m_watch_read ? "r" : "",
            m_watch_write ? "w" : "",
            GetHardwareIndex(),
            GetHitCount(),
            GetIgnoreCount(),
            m_callback,
            m_callback_baton);
}

bool
WatchpointLocation::IsEnabled() const
{
    return m_enabled;
}

void
WatchpointLocation::SetEnabled(uint32_t enabled)
{
    if (!enabled)
        SetHardwareIndex(LLDB_INVALID_INDEX32);
    m_enabled = enabled;
}

void
WatchpointLocation::SetWatchpointType (uint32_t type)
{
    m_watch_read = (type & LLDB_WATCH_TYPE_READ) != 0;
    m_watch_write = (type & LLDB_WATCH_TYPE_WRITE) != 0;
}

bool
WatchpointLocation::WatchpointRead () const
{
    return m_watch_read != 0;
}
bool
WatchpointLocation::WatchpointWrite () const
{
    return m_watch_write != 0;
}
uint32_t
WatchpointLocation::GetIgnoreCount () const
{
    return m_ignore_count;
}

void
WatchpointLocation::SetIgnoreCount (uint32_t n)
{
    m_ignore_count = n;
}