>> ==28501== 7 bytes in 1 blocks are indirectly lost in loss record 33 of 152
>> ==28501== at 0x402CFC7: malloc (vg_replace_malloc.c:296)
>> ==28501== by 0x40AF985: ???
>> ==28501== by 0x40AE2A1: ???
As Philippe Waroquiers said in another thread,
> So, probably you did not compile with debug info (-g option).
While you wait for the re-compile and re-link using -g, it may be possible
to get some clues by using low-level debugging techniques. Run the
program again, and while it is runnning then use a different terminal session
to run
cat /proc/PID/maps
where PID is the process ID; in the reported case PID was 28501.
Then lookup the addresses to see which module (shared library or main program)
contains each return address such as 0x40AF985, 0x40AE2A1, etc.
Run "nm" and "readelf --symbols" on the associated modules, then interpolate.
Those particular addresses look somewhat unusual. If they were 16 times smaller
(0x4AF985) then that might well be inside the main program. If they were
16 times larger (0x400AF985) then that often is in some system-supplied
shared library on a 32-bit i686 running Linux. But the actual address 0x40AF985
is far away from either usual case. The original poster said
> I checked memory leak (using Valgrind 3.10.1 in a Ubuntu 12.04 LTS machine)
but omitted the hardware architecture; please state what it is.
Use a debugger such as gdb to disassemble the code surrounding the return
addresses,
such as: (gdb) x/20i 0x40AF985 - 0x18
Look for references to global variables, other subroutines, constant values,
etc.
In some cases the numerical value of the offset to a pointer may suggest
the use of a particular data structure.
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