On Mon, May 13, 2013 at 6:46 AM, Gonzalo <[email protected]> wrote:
> ==8527== Process terminating with default action of signal 11 (SIGSEGV)
> ==8527== Access not within mapped region at address 0xBEF3EDA4
> ==8527== at 0x8091CD0: WriteFiasco(std::string const&) (fiasco_finder.h:28)
> ==8527== by 0x43F810D: __static_initialization_and_destruction_0(int, int)
> (exceptions.cpp:2)
> ==8527== by 0x43F817D: global constructors keyed to exceptions.cpp
> (exceptions.cpp:122)
...
> inline bool WriteFiasco(const std::string& fileName)
> {
> static int counter = 0;
> ++counter;
>
> std::ofstream file;
> file.open("FiascoFinder.txt", std::ios::out | std::ios::app);
> file << "Starting to initialize file - number: [" << counter << "]
> filename: [" << fileName.c_str() << "]" << std::endl;
> file.flush();
> file.close();
> return true; <----- line 28
> }
Looks like a crash in the std::ofstream destructor. You will need to
disassemble your code near the fault (0x8091CD0) to be sure.
The order in which static global constructors run is unspecified in
C++. I do not know whether this order can be affected by running under
Valgrind, but if so, it could explain your failure. Perhaps some
global static object in the C++ runtime has to be constructed before
std::ofstream will work at all. (I am certain this can happen if you
use, say, std::cout; I am actually a little surprised to see it for
std::ofstream.)
Anyway, it is possible that if you change this code not to use
std::ofstream, and just use read()/write() or fread()/fwrite(), then
you will work around the problem.
Then again this could just be a problem with Valgrind. A disassembly
near the fault is the first step toward finding out.
- Pat
P.S. As an aside, this is one reason most C++ experts recommend
avoiding global objects when possible and using the "Meyers Singleton"
when not.
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