Luke Stackwalker returns error when running, gprof works fine

Question

I'm used to gprof for profiling my C code, but I want to start using a GUI-based Windows application such as Luke Stackwalker. gprof works perfectly fine on my binary, but Luke Stackwalker has some issues:

Launching executable C:\lshare\POT03\Eclipse\Debug\POTaak3.exe.
SymInit: Symbol-SearchPath: ';.;C:\Program Files\Luke Stackwalker;C:\Program Files\Luke Stackwalker;C:\WINDOWS;C:\WINDOWS\system32;SRV*C:\websymbols*http://msdl.microsoft.com/download/symbols;', symOptions: 530, UserName: 'Pieter'

OS-Version: 5.1.2600 (Service Pack 3) 0x100-0x1

C:\lshare\POT03\Eclipse\Debug\POTaak3.exe:POTaak3.exe (00400000), size: 61440, SymType: '-unknown-', PDB: '$Tƒ|'
C:\WINDOWS\system32\ntdll.dll:ntdll.dll (7C900000), size: 753664, SymType: '-unknown-', PDB: '©Uƒ|'
C:\WINDOWS\system32\kernel32.dll:kernel32.dll (7C7D0000), size: 1048576, SymType: '-unknown-', PDB: '©Uƒ|'
C:\WINDOWS\system32\msvcrt.dll:msvcrt.dll (77BE0000), size: 360448, SymType: '-unknown-', PDB: '©Uƒ|'
ERROR: SymGetModuleInfo64, GetLastError: 1114 (Address: 7C90E514)
Sorting profile data.
Done; 2 samples collected at 1.$ samples/second.

Who shot the who in the what now? What am I doing wrong here? I did remember to use the -pg flag.

Answer 1

I understand why you want something other than gprof. Luke Stackwalker takes stack samples, but (last time I checked) it doesn't summarize inclusive % of wall-clock time used at the level of lines of code. On Linux, you could use lsstack or pstack, and there must be a similar tool on Windows. In your situation, I just rely on the pause button in the IDE to take stackshots.

Answer 2

The SymType -unknown- means that either the program has not been compiled with the gcc -g option to generate debug info, or the debug info format cannot be recognized by the microsoft debughelp library that is used by Luke Stackwalker.

Please check that you are using the -g option when compiling the program (and not stripping the executable). Otherwise, it would be nice to know which gcc version you are using.