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找到Vala/Sqlite3內存泄漏

2015-11-09 166 views
1

我的應用程序的一部分是一個後臺運行的守護進程，它定期收集數據並將其寫入sqlite3數據庫。 不幸的是，這個過程似乎每一次「同步」都會泄漏一些內存（獲取數據並將其寫入數據庫）。 我基本上做的是：在整個同步過程發生的地方創建一個新線程，創建一些空的「Gee.LinkedList」，將它們傳遞給一些函數來填充它們，然後將它們傳遞給其他函數以將它們寫入數據庫。在完成這個過程之後，我並不知道任何對LinkedList的引用。所以理論上應該釋放數據。我在運行超出範圍之前檢查了對象的引用計數，它是1.我有一種方法來檢查對象是否已成功釋放？ 我嘗試使用valgrind來查看我是否可以在我的代碼中檢測到問題。 Valgrind檢測到大量「可能丟失」的內存，全部指向與sqlite3交互的函數。找到Vala/Sqlite3內存泄漏

==5038== 2,078,576 bytes in 1,594 blocks are possibly lost in loss record 4,283 of 4,283 
==5038== at 0x4C28C50: malloc (in /usr/lib64/valgrind/vgpreload_memcheck-amd64-linux.so) 
==5038== by 0x535E666: sqlite3MemMalloc (sqlite3.c:17913) 
==5038== by 0x533BC02: mallocWithAlarm (sqlite3.c:21581) 
==5038== by 0x533BC02: sqlite3Malloc (sqlite3.c:21612) 
==5038== by 0x533EA46: pcache1Alloc (sqlite3.c:41451) 
==5038== by 0x534534A: pcache1AllocPage (sqlite3.c:41545) 
==5038== by 0x534534A: pcache1FetchStage2 (sqlite3.c:41995) 
==5038== by 0x53712E4: sqlite3PcacheFetch (sqlite3.c:40697) 
==5038== by 0x53712E4: sqlite3PagerAcquire (sqlite3.c:48339) 
==5038== by 0x537806C: accessPayload (sqlite3.c:59076) 
==5038== by 0x537A1F7: vdbeMemFromBtreeResize (sqlite3.c:65928) 
==5038== by 0x53993F6: sqlite3VdbeExec (sqlite3.c:75460) 
==5038== by 0x539A83E: sqlite3Step (sqlite3.c:71540) 
==5038== by 0x539A83E: sqlite3_step (sqlite3.c:71601) 
==5038== by 0x420639: feed_reader_db_manager_update_articles (in /usr/bin/feedreader-daemon) 
==5038== by 0x44693B: feed_reader_feed_server_getArticles (in /usr/bin/feedreader-daemon) 
==5038== by 0x440B44: __lambda11_ (in /usr/bin/feedreader-daemon) 
==5038== by 0x440E46: ___lambda11__gthread_func (in /usr/bin/feedreader-daemon) 
==5038== by 0xAECE834: ??? (in /usr/lib64/libglib-2.0.so.0.4600.1) 
==5038== by 0xB861609: start_thread (in /usr/lib64/libpthread-2.22.so) 
==5038== by 0xB59BBBC: clone (in /usr/lib64/libc-2.22.so)

在Valgrind的日誌中提到的功能如下：

public void update_articles(Gee.LinkedList<article> articles) 
{ 
    executeSQL("BEGIN TRANSACTION"); 

    var update_query = new QueryBuilder(QueryType.UPDATE, "main.articles"); 
    update_query.updateValuePair("unread", "$UNREAD"); 
    update_query.updateValuePair("marked", "$MARKED"); 
    update_query.updateValuePair("tags", "$TAGS"); 
    update_query.updateValuePair("lastModified", "$LASTMODIFIED"); 
    update_query.addEqualsCondition("articleID", "$ARTICLEID"); 
    update_query.build(); 

    Sqlite.Statement stmt; 
    int ec = sqlite_db.prepare_v2 (update_query.get(), update_query.get().length, out stmt); 

    if (ec != Sqlite.OK) 
     logger.print(LogMessage.ERROR, "upate_articles: %s".printf(sqlite_db.errmsg())); 

    int unread_position = stmt.bind_parameter_index("$UNREAD"); 
    int marked_position = stmt.bind_parameter_index("$MARKED"); 
    int tags_position = stmt.bind_parameter_index("$TAGS"); 
    int modified_position = stmt.bind_parameter_index("$LASTMODIFIED"); 
    int articleID_position = stmt.bind_parameter_index("$ARTICLEID"); 
    assert (unread_position > 0); 
    assert (marked_position > 0); 
    assert (tags_position > 0); 
    assert (modified_position > 0); 
    assert (articleID_position > 0); 


    foreach(var article in articles) 
    { 
     stmt.bind_text(unread_position, article.getUnread().to_string()); 
     stmt.bind_text(marked_position, article.getMarked().to_string()); 
     stmt.bind_text(tags_position, article.getTagString()); 
     stmt.bind_int (modified_position, article.getLastModified()); 
     stmt.bind_text(articleID_position, article.getArticleID()); 

     while(stmt.step() != Sqlite.DONE) {} 
     stmt.reset(); 
    } 

    executeSQL("COMMIT TRANSACTION"); 
}

我也嘗試檢查是否有明顯的錯誤生成的C代碼，但沒有成功。但也許我忽略了一些東西？它相當混亂：

void feed_reader_db_manager_update_articles (FeedReaderdbManager* self, GeeLinkedList* articles) { 
FeedReaderQueryBuilder* update_query = NULL; 
FeedReaderQueryBuilder* _tmp0_ = NULL; 
FeedReaderQueryBuilder* _tmp1_ = NULL; 
FeedReaderQueryBuilder* _tmp2_ = NULL; 
FeedReaderQueryBuilder* _tmp3_ = NULL; 
FeedReaderQueryBuilder* _tmp4_ = NULL; 
FeedReaderQueryBuilder* _tmp5_ = NULL; 
FeedReaderQueryBuilder* _tmp6_ = NULL; 
gchar* _tmp7_ = NULL; 
gchar* _tmp8_ = NULL; 
sqlite3_stmt* stmt = NULL; 
gint ec = 0; 
sqlite3* _tmp9_ = NULL; 
FeedReaderQueryBuilder* _tmp10_ = NULL; 
gchar* _tmp11_ = NULL; 
gchar* _tmp12_ = NULL; 
FeedReaderQueryBuilder* _tmp13_ = NULL; 
gchar* _tmp14_ = NULL; 
gchar* _tmp15_ = NULL; 
gint _tmp16_ = 0; 
gint _tmp17_ = 0; 
sqlite3_stmt* _tmp18_ = NULL; 
gint _tmp19_ = 0; 
gint _tmp20_ = 0; 
gint _tmp21_ = 0; 
gint unread_position = 0; 
sqlite3_stmt* _tmp27_ = NULL; 
gint _tmp28_ = 0; 
gint marked_position = 0; 
sqlite3_stmt* _tmp29_ = NULL; 
gint _tmp30_ = 0; 
gint tags_position = 0; 
sqlite3_stmt* _tmp31_ = NULL; 
gint _tmp32_ = 0; 
gint modified_position = 0; 
sqlite3_stmt* _tmp33_ = NULL; 
gint _tmp34_ = 0; 
gint articleID_position = 0; 
sqlite3_stmt* _tmp35_ = NULL; 
gint _tmp36_ = 0; 
gint _tmp37_ = 0; 
gint _tmp38_ = 0; 
gint _tmp39_ = 0; 
gint _tmp40_ = 0; 
gint _tmp41_ = 0; 
#line 651 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
g_return_if_fail (self != NULL); 
#line 651 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
g_return_if_fail (articles != NULL); 
#line 653 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
feed_reader_db_manager_executeSQL (self, "BEGIN TRANSACTION"); 
#line 655 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
_tmp0_ = feed_reader_query_builder_new (FEED_READER_QUERY_TYPE_UPDATE, "main.articles"); 
#line 655 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
update_query = _tmp0_; 
#line 656 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
_tmp1_ = update_query; 
#line 656 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
feed_reader_query_builder_updateValuePair (_tmp1_, "unread", "$UNREAD"); 
#line 657 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
_tmp2_ = update_query; 
#line 657 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
feed_reader_query_builder_updateValuePair (_tmp2_, "marked", "$MARKED"); 
#line 658 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
_tmp3_ = update_query; 
#line 658 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
feed_reader_query_builder_updateValuePair (_tmp3_, "tags", "$TAGS"); 
#line 659 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
_tmp4_ = update_query; 
#line 659 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
feed_reader_query_builder_updateValuePair (_tmp4_, "lastModified", "$LASTMODIFIED"); 
#line 660 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
_tmp5_ = update_query; 
#line 660 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
feed_reader_query_builder_addEqualsCondition (_tmp5_, "articleID", "$ARTICLEID", TRUE, FALSE); 
#line 661 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
_tmp6_ = update_query; 
#line 661 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
_tmp7_ = feed_reader_query_builder_build (_tmp6_); 
#line 661 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
_tmp8_ = _tmp7_; 
#line 661 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
_g_free0 (_tmp8_); 
#line 664 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
_tmp9_ = self->priv->sqlite_db; 
#line 664 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
_tmp10_ = update_query; 
#line 664 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
_tmp11_ = feed_reader_query_builder_get (_tmp10_); 
#line 664 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
_tmp12_ = _tmp11_; 
#line 664 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
_tmp13_ = update_query; 
#line 664 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
_tmp14_ = feed_reader_query_builder_get (_tmp13_); 
#line 664 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
_tmp15_ = _tmp14_; 
#line 664 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
_tmp16_ = strlen (_tmp15_); 
#line 664 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
_tmp17_ = _tmp16_; 
#line 664 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
_tmp19_ = sqlite3_prepare_v2 (_tmp9_, _tmp12_, _tmp17_, &_tmp18_, NULL); 
#line 664 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
_sqlite3_finalize0 (stmt); 
#line 664 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
stmt = _tmp18_; 
#line 664 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
_tmp20_ = _tmp19_; 
#line 664 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
_g_free0 (_tmp15_); 
#line 664 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
_g_free0 (_tmp12_); 
#line 664 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
ec = _tmp20_; 
#line 666 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
_tmp21_ = ec; 
#line 666 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
if (_tmp21_ != SQLITE_OK) { 
#line 5122 "DB_Manager.c" 
    FeedReaderLogger* _tmp22_ = NULL; 
    sqlite3* _tmp23_ = NULL; 
    const gchar* _tmp24_ = NULL; 
    gchar* _tmp25_ = NULL; 
    gchar* _tmp26_ = NULL; 
#line 667 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
    _tmp22_ = feed_reader_logger; 
#line 667 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
    _tmp23_ = self->priv->sqlite_db; 
#line 667 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
    _tmp24_ = sqlite3_errmsg (_tmp23_); 
#line 667 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
    _tmp25_ = g_strdup_printf ("upate_articles: %s", _tmp24_); 
#line 667 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
    _tmp26_ = _tmp25_; 
#line 667 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
    feed_reader_logger_print (_tmp22_, FEED_READER_LOG_MESSAGE_ERROR, _tmp26_); 
#line 667 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
    _g_free0 (_tmp26_); 
#line 5142 "DB_Manager.c" 
} 
#line 669 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
_tmp27_ = stmt; 
#line 669 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
_tmp28_ = sqlite3_bind_parameter_index (_tmp27_, "$UNREAD"); 
#line 669 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
unread_position = _tmp28_; 
#line 670 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
_tmp29_ = stmt; 
#line 670 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
_tmp30_ = sqlite3_bind_parameter_index (_tmp29_, "$MARKED"); 
#line 670 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
marked_position = _tmp30_; 
#line 671 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
_tmp31_ = stmt; 
#line 671 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
_tmp32_ = sqlite3_bind_parameter_index (_tmp31_, "$TAGS"); 
#line 671 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
tags_position = _tmp32_; 
#line 672 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
_tmp33_ = stmt; 
#line 672 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
_tmp34_ = sqlite3_bind_parameter_index (_tmp33_, "$LASTMODIFIED"); 
#line 672 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
modified_position = _tmp34_; 
#line 673 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
_tmp35_ = stmt; 
#line 673 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
_tmp36_ = sqlite3_bind_parameter_index (_tmp35_, "$ARTICLEID"); 
#line 673 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
articleID_position = _tmp36_; 
#line 674 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
_tmp37_ = unread_position; 
#line 674 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
_vala_assert (_tmp37_ > 0, "unread_position > 0"); 
#line 675 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
_tmp38_ = marked_position; 
#line 675 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
_vala_assert (_tmp38_ > 0, "marked_position > 0"); 
#line 676 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
_tmp39_ = tags_position; 
#line 676 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
_vala_assert (_tmp39_ > 0, "tags_position > 0"); 
#line 677 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
_tmp40_ = modified_position; 
#line 677 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
_vala_assert (_tmp40_ > 0, "modified_position > 0"); 
#line 678 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
_tmp41_ = articleID_position; 
#line 678 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
_vala_assert (_tmp41_ > 0, "articleID_position > 0"); 
#line 5194 "DB_Manager.c" 
{ 
    GeeLinkedList* _article_list = NULL; 
    GeeLinkedList* _tmp42_ = NULL; 
    GeeLinkedList* _tmp43_ = NULL; 
    gint _article_size = 0; 
    GeeLinkedList* _tmp44_ = NULL; 
    gint _tmp45_ = 0; 
    gint _tmp46_ = 0; 
    gint _article_index = 0; 
#line 681 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
    _tmp42_ = articles; 
#line 681 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
    _tmp43_ = _g_object_ref0 (_tmp42_); 
#line 681 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
    _article_list = _tmp43_; 
#line 681 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
    _tmp44_ = _article_list; 
#line 681 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
    _tmp45_ = gee_abstract_collection_get_size ((GeeCollection*) _tmp44_); 
#line 681 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
    _tmp46_ = _tmp45_; 
#line 681 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
    _article_size = _tmp46_; 
#line 681 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
    _article_index = -1; 
#line 681 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
    while (TRUE) { 
#line 5222 "DB_Manager.c" 
     gint _tmp47_ = 0; 
     gint _tmp48_ = 0; 
     gint _tmp49_ = 0; 
     FeedReaderarticle* article = NULL; 
     GeeLinkedList* _tmp50_ = NULL; 
     gint _tmp51_ = 0; 
     gpointer _tmp52_ = NULL; 
     sqlite3_stmt* _tmp53_ = NULL; 
     gint _tmp54_ = 0; 
     FeedReaderarticle* _tmp55_ = NULL; 
     FeedReaderArticleStatus _tmp56_ = 0; 
     gchar* _tmp57_ = NULL; 
     GDestroyNotify _tmp58_ = NULL; 
     sqlite3_stmt* _tmp59_ = NULL; 
     gint _tmp60_ = 0; 
     FeedReaderarticle* _tmp61_ = NULL; 
     FeedReaderArticleStatus _tmp62_ = 0; 
     gchar* _tmp63_ = NULL; 
     GDestroyNotify _tmp64_ = NULL; 
     sqlite3_stmt* _tmp65_ = NULL; 
     gint _tmp66_ = 0; 
     FeedReaderarticle* _tmp67_ = NULL; 
     gchar* _tmp68_ = NULL; 
     GDestroyNotify _tmp69_ = NULL; 
     sqlite3_stmt* _tmp70_ = NULL; 
     gint _tmp71_ = 0; 
     FeedReaderarticle* _tmp72_ = NULL; 
     gint _tmp73_ = 0; 
     sqlite3_stmt* _tmp74_ = NULL; 
     gint _tmp75_ = 0; 
     FeedReaderarticle* _tmp76_ = NULL; 
     gchar* _tmp77_ = NULL; 
     GDestroyNotify _tmp78_ = NULL; 
     sqlite3_stmt* _tmp81_ = NULL; 
#line 681 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
     _tmp47_ = _article_index; 
#line 681 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
     _article_index = _tmp47_ + 1; 
#line 681 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
     _tmp48_ = _article_index; 
#line 681 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
     _tmp49_ = _article_size; 
#line 681 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
     if (!(_tmp48_ < _tmp49_)) { 
#line 681 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
      break; 
#line 5269 "DB_Manager.c" 
     } 
#line 681 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
     _tmp50_ = _article_list; 
#line 681 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
     _tmp51_ = _article_index; 
#line 681 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
     _tmp52_ = gee_abstract_list_get ((GeeAbstractList*) _tmp50_, _tmp51_); 
#line 681 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
     article = (FeedReaderarticle*) _tmp52_; 
#line 683 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
     _tmp53_ = stmt; 
#line 683 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
     _tmp54_ = unread_position; 
#line 683 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
     _tmp55_ = article; 
#line 683 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
     _tmp56_ = feed_reader_article_getUnread (_tmp55_); 
#line 683 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
     _tmp57_ = feed_reader_article_status_to_string (_tmp56_); 
#line 683 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
     _tmp58_ = g_free; 
#line 683 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
     sqlite3_bind_text (_tmp53_, _tmp54_, _tmp57_, -1, _tmp58_); 
#line 684 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
     _tmp59_ = stmt; 
#line 684 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
     _tmp60_ = marked_position; 
#line 684 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
     _tmp61_ = article; 
#line 684 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
     _tmp62_ = feed_reader_article_getMarked (_tmp61_); 
#line 684 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
     _tmp63_ = feed_reader_article_status_to_string (_tmp62_); 
#line 684 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
     _tmp64_ = g_free; 
#line 684 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
     sqlite3_bind_text (_tmp59_, _tmp60_, _tmp63_, -1, _tmp64_); 
#line 685 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
     _tmp65_ = stmt; 
#line 685 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
     _tmp66_ = tags_position; 
#line 685 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
     _tmp67_ = article; 
#line 685 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
     _tmp68_ = feed_reader_article_getTagString (_tmp67_); 
#line 685 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
     _tmp69_ = g_free; 
#line 685 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
     sqlite3_bind_text (_tmp65_, _tmp66_, _tmp68_, -1, _tmp69_); 
#line 686 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
     _tmp70_ = stmt; 
#line 686 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
     _tmp71_ = modified_position; 
#line 686 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
     _tmp72_ = article; 
#line 686 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
     _tmp73_ = feed_reader_article_getLastModified (_tmp72_); 
#line 686 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
     sqlite3_bind_int (_tmp70_, _tmp71_, _tmp73_); 
#line 687 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
     _tmp74_ = stmt; 
#line 687 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
     _tmp75_ = articleID_position; 
#line 687 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
     _tmp76_ = article; 
#line 687 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
     _tmp77_ = feed_reader_article_getArticleID (_tmp76_); 
#line 687 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
     _tmp78_ = g_free; 
#line 687 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
     sqlite3_bind_text (_tmp74_, _tmp75_, _tmp77_, -1, _tmp78_); 
#line 689 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
     while (TRUE) { 
#line 5343 "DB_Manager.c" 
      sqlite3_stmt* _tmp79_ = NULL; 
      gint _tmp80_ = 0; 
#line 689 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
      _tmp79_ = stmt; 
#line 689 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
      _tmp80_ = sqlite3_step (_tmp79_); 
#line 689 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
      if (!(_tmp80_ != SQLITE_DONE)) { 
#line 689 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
       break; 
#line 5354 "DB_Manager.c" 
      } 
     } 
#line 690 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
     _tmp81_ = stmt; 
#line 690 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
     sqlite3_reset (_tmp81_); 
#line 681 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
     _g_object_unref0 (article); 
#line 5363 "DB_Manager.c" 
    } 
#line 681 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
    _g_object_unref0 (_article_list); 
#line 5367 "DB_Manager.c" 
} 
#line 693 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
feed_reader_db_manager_executeSQL (self, "COMMIT TRANSACTION"); 
#line 651 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
_sqlite3_finalize0 (stmt); 
#line 651 "/home/jeanluc/Projects/FeedReader/master/src/DB_Manager.vala" 
_g_object_unref0 (update_query); 
#line 5375 "DB_Manager.c" 
}

任何類型的提示我怎麼能追蹤到這個問題的高度讚賞:)

來源

2015-11-09 Jan Lukas Gernert

+1

使用調試符號重新編譯libsqlite3.so.0.8.6不會解決問題，但可能有助於找出原因。只需將其放置在當前目錄中並使用LD_LIBRARY_PATH =。 – arsv

+0

@arsv：thx，但我仍然不知道什麼可能是錯誤的：D現在輸出如下所示：http://pastebin.com/N5Pu2JNS –

回答

2

爲什麼你認爲你有內存泄漏？

如果一個Vala引用計數對象在超出範圍之前的計數爲1，我相信它會被unref釋放。在Vala方面，您應該注意GLib可以通過使用自己的堆調用來混淆Valgrind - 請參閱Valgrind reports memory 'possibly lost' when using glib data types。我認爲Valgrind在這個地方有個壓制文件。

看起來好像您在問題中粘貼的Valgrind報告是說SQLite在step後沒有釋放其內存。難道這是一個緩存的事情的建議在Is there any memory leak in the normal routine of sqlite3_*()?

我很好奇，爲什麼瓦拉行號不是在Valgrind的顯示，你必須對C輸出--debug標誌設置。

來源

2015-11-09 21:06:08 AlThomas

+0

我很確定有內存泄漏，因爲內存佔用隨着每次同步，守護進程的數量不斷增長。它開始時爲30MB，一天之後它可以增長到100MB以上，並且該應用的用戶報告發現他的守護進程在正常運行時間後耗用了2.4GB。但我會停用sqlite的緩存並進行更多測試。 Thx :) –

+0

好的，這是很多:)一天有多少個請求？由於您每次都在使用新線程，您是在完成準備好的語句並按照[SQLite中的動態內存分配]（https://www.sqlite.org/malloc.html）中的建議關閉數據庫？不太可能的可能性可能是'exec（）'的錯誤，這必須讓內存釋放 - https://www.sqlite.org/c3ref/exec.html你似乎有一個單獨的函數'executeSQL'，只是爲了一些簡單的SQL（開始和結束事務）。那裏可能有一個頻繁的未釋放的錯誤？ – AlThomas

+0

在sqlite中禁用緩存後，valgrind日誌中的所有「噪音」都消失了，我發現在與libxml2交互的應用程序的另一部分泄漏了相當多的內存。這實際上讓現在更有意義。Thx很多:)我會看到我得到多遠，併發佈一個解決方案，我的問題或更多的問題，只要我深入挖掘:) –

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