Crash Dump Analysis Patterns (Part 24, Linux)

This is a Linux variant of Coincidental Symbolic Information pattern previously described for Mac OS X and Windows platforms. The idea is the same: to disassemble the address to see if the preceding instruction is a call. If it is indeed then most likely the symbolic address is a return address from past Execution Residue:

(gdb) x/i 0x4005e6
0x4005e6 <_Z6work_3v+9>: pop    %rbp

(gdb) disassemble 0x4005e6
Dump of assembler code for function _Z6work_3v:
0x00000000004005dd <+0>: push   %rbp
0x00000000004005de <+1>: mov    %rsp,%rbp
0x00000000004005e1 <+4>: callq  0×4005d2 <_Z6work_4v>
0×00000000004005e6 <+9>: pop    %rbp
0×00000000004005e7 <+10>: retq
End of assembler dump.

(gdb) x/4i 0x49c740-4
0x49c73c: add    %al,(%rax)
0x49c73e: add    %al,(%rax)
0×49c740 <default_attr>: add    %al,(%rax)
0×49c742 <default_attr+2>: add    %al,(%rax)

- Dmitry Vostokov @ + -

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