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<p class="MsoNormal">Hi Team,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I am writing an LLVM pass that compiles fine and opt instrumentation goes fine as well. But when I run the instrumented C-program then I get the following stack dump. My question is, how can I debug the problem in this scenario please?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">// LLVM pass compiles fine and the following OPT instrumentation goes fine for basic malloc.bc program as well. Malloc.bc runs fine without any instrumentation.<o:p></o:p></p>
<p class="MsoNormal">opt -o a.bc -load /data/ahmad/llvm3.1/Release+Asserts/lib/mypass.so -MyPass < malloc.bc
<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">$ lli a.bc<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">*** buffer overflow detected ***: lli terminated<o:p></o:p></p>
<p class="MsoNormal">======= Backtrace: =========<o:p></o:p></p>
<p class="MsoNormal">/lib/x86_64-linux-gnu/libc.so.6(__fortify_fail+0x37)[0x7f946b353807]<o:p></o:p></p>
<p class="MsoNormal">/lib/x86_64-linux-gnu/libc.so.6(+0x109700)[0x7f946b352700]<o:p></o:p></p>
<p class="MsoNormal">/lib/x86_64-linux-gnu/libc.so.6(+0x108b69)[0x7f946b351b69]<o:p></o:p></p>
<p class="MsoNormal">/lib/x86_64-linux-gnu/libc.so.6(_IO_default_xsputn+0xdd)[0x7f946b2c513d]<o:p></o:p></p>
<p class="MsoNormal">/lib/x86_64-linux-gnu/libc.so.6(_IO_vfprintf+0x1d42)[0x7f946b293702]<o:p></o:p></p>
<p class="MsoNormal">/lib/x86_64-linux-gnu/libc.so.6(__vsprintf_chk+0x94)[0x7f946b351c04]<o:p></o:p></p>
<p class="MsoNormal">/lib/x86_64-linux-gnu/libc.so.6(__sprintf_chk+0x7d)[0x7f946b351b4d]<o:p></o:p></p>
<p class="MsoNormal">/data/ahmad/llvm3.1/Release+Asserts/lib/libdatinstrument.so(initProfiler+0x23b)[0x7f946c23e70b]<o:p></o:p></p>
<p class="MsoNormal">[0x7f946c5db02a]<o:p></o:p></p>
<p class="MsoNormal">======= Memory map: ========<o:p></o:p></p>
<p class="MsoNormal">00400000-00f84000 r-xp 00000000 fc:00 1974479 /usr/local/bin/lli<o:p></o:p></p>
<p class="MsoNormal">01183000-011d6000 r--p 00b83000 fc:00 1974479 /usr/local/bin/lli<o:p></o:p></p>
<p class="MsoNormal">…<o:p></o:p></p>
<p class="MsoNormal">Stack dump:<o:p></o:p></p>
<p class="MsoNormal">0. Program arguments: lli a.bc<o:p></o:p></p>
<p class="MsoNormal">Aborted (core dumped)<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Thanks.<o:p></o:p></p>
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