zoukankan      html  css  js  c++  java
  • (OK) 调试cBPM—CentOS7—gdb—gdbserver—问题的解决—1—手机死机

    //break main.cpp:63
    //break main.cpp:155
    //break WAPI.cpp:72
    //break bOSXMLHelper.cpp:40

    //break PlatformUtils.hpp:813
    //break MemoryManagerImpl.cpp:37
    //break WorkflowListener.cpp:67

    //break XMLString.hpp:1451
    //break Hashers.hpp:47

    //break RangeToken.cpp:335

    //break XMLRangeFactory.cpp:113

    //break XMLInitializer.cpp:51
    //break XMLInitializer.cpp:62            // 调试到此处,停止
    //break XMLInitializer.cpp:61            // 所以,进入到initializeDatatypeValidatorFactory()单步跟踪,使用s,不要用n

    break IconvTransService.cpp:432        //找到了故障点(在这一行的)。
    break IconvTransService.cpp:460        //估计是内存分配问题,比如 溢出

    ===================================================================
    http://c-dev.xerces.apache.narkive.com/DWSpAHdF/xerces-trunk-on-openbsd-5-1
    ===================================================================
    Post by Alberto Massari
    Hi Simon,
    it looks that libc in OpenBSD 5.1 is not obeying to the documentation for
    wcsrtombs/mbsrtowcs.
    If *d**s**t* is not a null pointer, the pointer object pointed to
    by *s**r**c* is assigned either a null pointer (if conversion
    stopped due to reaching a terminating null wide-character)
    or the address just past the last wide-character converted
    (if any).
    Instead of hacking the code to try to detect whether the conversion
    actually wrote a NULL character in the converted string, I chose to modify
    the 'configure' script to detect this behaviour and disable the usage of
    the re-entrant functions if it doesn't match how the Xerces code uses them.
    Thank you for reporting this issue,
    Alberto
    ---------------------------------------
    Hi,
    I wanted to try using xerces on openbsd 5.1.
    unknow reason.
    After reading the code, it turns out that the end of conversion by
    wcsrtombs and mbsrtowcs is based on a test on source pointer (source
    pointer should point on null character).
    The problem is that this behaviour is not implemented. Source pointer
    points on the character following the last converted character leading
    xerces binary to a risky memory access.

    Below, there is a patch based on values returned by the functions (-1 in
    case of error, >= 0 in case of complete/incomplete conversion) that fixes
    the problem.
    Regards,
    Simon Elbaz
    $ svn diff xercesc/util/Transcoders/Iconv/IconvTransService.cpp
    Index: xercesc/util/Transcoders/Iconv/IconvTransService.cpp
    ===================================================================
    --- xercesc/util/Transcoders/Iconv/IconvTransService.cpp (revision
    1387785)
    +++ xercesc/util/Transcoders/Iconv/IconvTransService.cpp (working
    copy)
    @@ -429,7 +429,7 @@
    srcBuffer[gTempBuffArraySize - 1] = 0;
    const wchar_t *src = 0;
    - while (toTranscode[srcCursor] || src)
    + while (toTranscode[srcCursor])
    {
    if (src == 0) // copy a piece of the source string into a local
    // buffer, converted to wchar_t and NULL-terminated.
    @@ -454,7 +454,7 @@
    break;
    }
    dstCursor += len;
    - if (src != 0) // conversion not finished. This *always* means there
    + if (len == (resultSize - dstCursor)) // conversion not finished.
    This *always* means there
    // was not enough room in the destination buffer.
    {
    reallocString<char>(resultString, resultSize, manager,
    resultString != localBuffer);
    @@ -512,9 +512,9 @@
    break;
    }
    dstCursor += len;
    - if (src == 0) // conversion finished
    + if ((len >= 0) && (len < (resultSize - dstCursor))) // conversion
    finished
    break;
    - if (dstCursor >= resultSize - 1)
    + if (len == (resultSize - dstCursor))
    reallocString<wchar_t>(tmpString, resultSize, manager,
    tmpString != localBuffer);
    }
    ===================================================================


  • 相关阅读:
    Qt内存回收机制
    Qt坐标系统
    Qt信号与槽的使用
    Qt初始化代码基本说明
    Qt下载、安装及环境搭建
    搭建CentOs7的WebServer
    Laying out a webpage is easy with flex
    Let's write a framework.
    使用go语言开发一个后端gin框架的web项目
    个人总结的J2EE目前知道的涵盖面,从大方向入手,多写单元测试,加强基础
  • 原文地址:https://www.cnblogs.com/ztguang/p/12647093.html
Copyright © 2011-2022 走看看