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/*
    Copyright (C) 2009  Jiri Moskovcak (jmoskovc@redhat.com)
    Copyright (C) 2009  RedHat inc.

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License along
    with this program; if not, write to the Free Software Foundation, Inc.,
    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
    */

#include "abrtlib.h"
#include "Daemon.h"
#include "ABRTException.h"
#include "CrashWatcher.h"

void CCrashWatcher::Status(const std::string& pMessage, const char* peer, uint64_t pJobID)
{
    VERB1 log("Update('%s'): %s", peer, pMessage.c_str());
    if (g_pCommLayer != NULL)
        g_pCommLayer->Update(pMessage, peer, pJobID);
}

void CCrashWatcher::Warning(const std::string& pMessage, const char* peer, uint64_t pJobID)
{
    VERB1 log("Warning('%s'): %s", peer, pMessage.c_str());
    if (g_pCommLayer != NULL)
        g_pCommLayer->Warning(pMessage, peer, pJobID);
}

CCrashWatcher::CCrashWatcher()
{
}

CCrashWatcher::~CCrashWatcher()
{
}

vector_crash_infos_t GetCrashInfos(const std::string &pUID)
{
    vector_crash_infos_t retval;
    log("Getting crash infos...");
    try
    {
        vector_pair_string_string_t UUIDsUIDs;
        UUIDsUIDs = GetUUIDsOfCrash(pUID);

        unsigned int ii;
        for (ii = 0; ii < UUIDsUIDs.size(); ii++)
        {
            mw_result_t res;
            map_crash_info_t info;

            res = GetCrashInfo(UUIDsUIDs[ii].first, UUIDsUIDs[ii].second, info);
            switch (res)
            {
                case MW_OK:
                    retval.push_back(info);
                    break;
                case MW_ERROR:
                    warn_client("Can not find debug dump directory for UUID: " + UUIDsUIDs[ii].first + ", deleting from database");
                    update_client("Can not find debug dump directory for UUID: " + UUIDsUIDs[ii].first + ", deleting from database");
                    DeleteCrashInfo(UUIDsUIDs[ii].first, UUIDsUIDs[ii].second);
                    break;
                case MW_FILE_ERROR:
                    {
                        std::string debugDumpDir;
                        warn_client("Can not open file in debug dump directory for UUID: " + UUIDsUIDs[ii].first + ", deleting");
                        update_client("Can not open file in debug dump directory for UUID: " + UUIDsUIDs[ii].first + ", deleting");
                        debugDumpDir = DeleteCrashInfo(UUIDsUIDs[ii].first, UUIDsUIDs[ii].second);
                        DeleteDebugDumpDir(debugDumpDir);
                    }
                    break;
                default:
                    break;
            }
        }
    }
    catch (CABRTException& e)
    {
        if (e.type() == EXCEP_FATAL)
        {
            throw e;
        }
        warn_client(e.what());
        update_client(e.what());
    }

    //retval = GetCrashInfos(pUID);
    //Notify("Sent crash info");
    return retval;
}

/*
 * "GetJobResult" is a bit of a misnomer.
 * It actually _creates_ a_ report_ and returns the result.
 * It is called in two cases:
 * (1) by CreateReport dbus call -> CreateReportThread(), in the thread
 * (2) by GetJobResult dbus call
 * In the second case, it finishes quickly, because previous
 * CreateReport dbus call already did all the processing, and we just retrieve
 * the result from dump directory, which is fast.
 */
map_crash_report_t GetJobResult(const char* pUUID, const char* pUID, int force)
{
    map_crash_info_t crashReport;

    /* FIXME: starting from here, any shared data must be protected with a mutex.
     * For example, CreateCrashReport does:
     * g_pPluginManager->GetDatabase(g_settings_sDatabase);
     * which is unsafe wrt concurrent updates to g_pPluginManager state.
     */
    mw_result_t res = CreateCrashReport(pUUID, pUID, force, crashReport);
    switch (res)
    {
        case MW_OK:
            break;
        case MW_IN_DB_ERROR:
            warn_client(std::string("Did not find crash with UUID ") + pUUID + " in database");
            break;
        case MW_PLUGIN_ERROR:
            warn_client("Particular analyzer plugin isn't loaded or there is an error within plugin(s)");
            break;
        case MW_CORRUPTED:
        case MW_FILE_ERROR:
        default:
            warn_client(std::string("Corrupted crash with UUID ") + pUUID + ", deleting");
            std::string debugDumpDir = DeleteCrashInfo(pUUID, pUID);
            DeleteDebugDumpDir(debugDumpDir);
            break;
    }
    return crashReport;
}

typedef struct thread_data_t {
    pthread_t thread_id;
    char* UUID;
    char* UID;
    int force;
    char* peer;
} thread_data_t;
static void* create_report(void* arg)
{
    thread_data_t *thread_data = (thread_data_t *) arg;

    /* Client name is per-thread, need to set it */
    set_client_name(thread_data->peer);

    try
    {
        /* "GetJobResult" is a bit of a misnomer */
        log("Creating report...");
        map_crash_info_t crashReport = GetJobResult(thread_data->UUID, thread_data->UID, thread_data->force);
        g_pCommLayer->JobDone(thread_data->peer, thread_data->UUID);
    }
    catch (CABRTException& e)
    {
        warn_client(e.what());
    }
    catch (...) {}
    set_client_name(NULL);

    /* free strduped strings */
    free(thread_data->UUID);
    free(thread_data->UID);
    free(thread_data->peer);
    free(thread_data);

    /* Bogus value. pthreads require us to return void* */
    return NULL;
}
int CreateReportThread(const char* pUUID, const char* pUID, int force, const char* pSender)
{
    thread_data_t *thread_data = (thread_data_t *)xzalloc(sizeof(thread_data_t));
    thread_data->UUID = xstrdup(pUUID);
    thread_data->UID = xstrdup(pUID);
    thread_data->force = force;
    thread_data->peer = xstrdup(pSender);

//TODO: do we need this?
//pthread_attr_t attr;
//pthread_attr_init(&attr);
//pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);

    int r = pthread_create(&thread_data->thread_id, NULL, create_report, thread_data);
    if (r != 0)
    {
        free(thread_data->UUID);
        free(thread_data->UID);
        free(thread_data->peer);
        free(thread_data);
        /* The only reason this may happen is system-wide resource starvation,
         * or ulimit is exceeded (someone floods us with CreateReport() dbus calls?)
         */
        error_msg("Can't create thread");
        return r;
    }
    VERB3 log("Thread %llx created", (unsigned long long)thread_data->thread_id);
//pthread_attr_destroy(&attr);
    return r;
}

bool DeleteDebugDump(const std::string& pUUID, const std::string& pUID)
{
    try
    {
        std::string debugDumpDir = DeleteCrashInfo(pUUID, pUID);
        DeleteDebugDumpDir(debugDumpDir);
    }
    catch (CABRTException& e)
    {
        if (e.type() == EXCEP_FATAL)
        {
            throw e;
        }
        warn_client(e.what());
        update_client(e.what());
        return false;
    }
    return true;
}