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POlibcurl strange crashes after Idle time
 

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  1. POlibcurl strange crashes after Idle time
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    <p>I use libcurl for FTP works and it works fine but if left idle for some time it just crashes. Here is the backtrace which despite reading it for some time I cannot make sense of what is wrong. The trace does not show where in my functions crash originates and so am left orphan here by debugger. I use threads if that add value Compiler is GCC 4.7 on Linux</p> <pre><code>0 0x00007fff8e09b524 addbyter /home/stefano/Desktop/myproject/curl-7.33.0/lib/mprintf.c 914 1 0x00007fff8e09a32f dprintf_formatf /home/stefano/Desktop/myproject/curl-7.33.0/lib/mprintf.c 572 2 0x00007fff8e09b5a4 curl_mvsnprintf /home/stefano/Desktop/myproject/curl-7.33.0/lib/mprintf.c 932 3 0x00007fff8e089510 Curl_failf /home/stefano/Desktop/myproject/curl-7.33.0/lib/sendf.c 152 4 0x00007fff8e07dbf4 Curl_resolv_timeout /home/stefano/Desktop/myproject/curl-7.33.0/lib/hostip.c 618 5 0x00007fff78012bf8 ?? 6 0x000000c300000016 ?? 7 0x00007fff8e0d3604 ?? 8 0x0000000000000002 ?? 9 0x00000000001b7740 ?? 10 0x0000000000000000 ?? </code></pre> <p><strong>UPDATE 1</strong> Run it again under debugger and met a crash at the line</p> <pre><code>FILE *fd; fd = fopen(files[i].c_str(), "rb"); //&lt;---here goes the crash! </code></pre> <p>files[i].c_str() is supposed to give const* char from wxString The new BT is</p> <pre><code>0 0x00007fff8e08952a Curl_failf /home/stefano/Desktop/myproject/curl-7.33.0/lib/sendf.c 154 1 0x00007fff8e07dbf4 Curl_resolv_timeout /home/stefano/Desktop/myproject/curl-7.33.0/lib/hostip.c 618 2 0x00007fff780158c8 ?? 3 0x00000000001b7730 ?? 4 0x00007fff78009808 ?? 5 0x00007fff78015e79 ?? 6 0x00007fff78009808 ?? 7 0x00007fff8c8a04a0 ?? 8 0x00007fff8e0c84ca ftp_multi_statemach /home/stefano/Desktop/myproject/curl-7.33.0/lib/ftp.c 3113 </code></pre>
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    1. USStefano Mtangoo
    1. USStefano Mtangoo
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    1. COThis seems to me as if you've corrupted the internal malloc() structures somewhere in your code, which is most probably caused by allocating not enough space somewhere. Compile your code with valgrind and check if it throws any errors.
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      1. POlibcurl strange crashes after Idle time
      1. USGuntram Blohm
    2. COI use C++ and does not do any allocation. Am trying to probe and see where ths is rising from. I will try valgrind option
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      1. POlibcurl strange crashes after Idle time
      1. USStefano Mtangoo
    3. COSorry, didnt see the c++ tag. Still, it's easy to write to a memory location that shouldn't be written to in c++ as well. In my experience, crashes in libraries that normally work well are mostly triggered by that kind of error, that's why i suggested it.
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      1. POlibcurl strange crashes after Idle time
      1. USGuntram Blohm
 

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