Archive for July 20th, 2012

Crash Dump Analysis Patterns (Part 18, Mac OS X)

Friday, July 20th, 2012

This is a Mac OS X / GDB counterpart to Truncated Dump pattern previously described for Windows platforms:

(gdb) info threads
Cannot access memory at address 0x7fff885e9e42
4 0x00007fff885e9e42 in ?? ()
3 0x00007fff885e9e42 in ?? ()
2 0x00007fff885e9e42 in ?? ()
* 1 0x00007fff885e9e42 in ?? ()
warning: Couldn't restore frame in current thread, at frame 0
0x00007fff885e9e42 in ?? ()

(gdb) disass 0x00007fff885e9e42
No function contains specified address.

(gdb) info r rsp
rsp 0x7fff67fe8a18 0x7fff67fe8a18

(gdb) x/100a 0x7fff67fe8a18
0x7fff67fe8a18: Cannot access memory at address 0x7fff67fe8a18

This often happens if there is no space to save a full core dump.

- Dmitry Vostokov @ DumpAnalysis.org + TraceAnalysis.org -

Forthcoming Training: Accelerated Mac OS X Core Dump Analysis

Posted in Core Dump Analysis, Crash Dump Patterns, GDB for WinDbg Users, Mac Crash Corner, Mac OS X, x64 Mac OS X | No Comments »

Crash Dump Analysis Patterns (Part 77, Mac OS X)

Friday, July 20th, 2012

This is a Mac OS X / GDB counterpart to C++ Exception pattern previously described for Windows platforms:

(gdb) bt
#0 0x00007fff88bd582a in __kill ()
#1 0x00007fff8c184a9c in abort ()
#2 0x00007fff852f57bc in abort_message ()
#3 0x00007fff852f2fcf in default_terminate ()
#4 0x00007fff852f3001 in safe_handler_caller ()
#5 0x00007fff852f305c in std::terminate ()
#6 0×00007fff852f4152 in __cxa_throw ()
#7 0×000000010e402be8 in bar ()
#8 0×000000010e402c99 in foo ()
#9 0×000000010e402cbb in main (argc=1, argv=0×7fff6e001b18)

The modeling application source code:

class Exception

{

    int code;

    std::string description;

 

public:

    Exception(int _code, std::string _desc) : code(_code), description(_desc) {}

};

 

void bar()

{

    throw new Exception(5, “Access Denied”);

}

 

void foo()

{

    bar();

}

 

int main(int argc, const char * argv[])

{

    foo();

    return 0;

}  

- Dmitry Vostokov @ DumpAnalysis.org + TraceAnalysis.org -

Forthcoming Training: Accelerated Mac OS X Core Dump Analysis

Posted in Core Dump Analysis, Crash Dump Patterns, GDB for WinDbg Users, Mac Crash Corner, Mac OS X, x64 Mac OS X | No Comments »