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fprintf memory leak


Don't waste time debugging

Your setup probably has a bad gcc or valgrind build or simply isn't up-to-date.

I just tried:

gcc -o junk /tmp/junk.cpp && ~/src/valgrind/coregrind/valgrind --leak-check=full --show-reachable=yes /tmp/junk

on the following snippet

#include <stdio.h>int main(){    printf( "%.3f", 3.0 );}

Configuration

  • OSX 10.7.2
  • valgrind-3.7.0.SVN
  • gcc version 4.2.1 (Based on Apple Inc. build 5658) (LLVM build 2335.15.00)

    Using built-in specs.Target: i686-apple-darwin11Configured with: /private/var/tmp/llvmgcc42/llvmgcc42-2335.15~25/src/configure --disable-checking --enable-werror --prefix=/Developer/usr/llvm-gcc-4.2 --mandir=/share/man --enable-languages=c,objc,c++,obj-c++ --program-prefix=llvm- --program-transform-name=/^[cg][^.-]*$/s/$/-4.2/ --with-slibdir=/usr/lib --build=i686-apple-darwin11 --enable-llvm=/private/var/tmp/llvmgcc42/llvmgcc42-2335.15~25/dst-llvmCore/Developer/usr/local --program-prefix=i686-apple-darwin11- --host=x86_64-apple-darwin11 --target=i686-apple-darwin11 --with-gxx-include-dir=/usr/include/c++/4.2.1Thread model: posixgcc version 4.2.1 (Based on Apple Inc. build 5658) (LLVM build 2335.15.00)

Valgrind Output

==58980== Memcheck, a memory error detector==58980== Copyright (C) 2002-2010, and GNU GPL'd, by Julian Seward et al.==58980== Using Valgrind-3.7.0.SVN and LibVEX; rerun with -h for copyright info==58980== Command: /tmp/junk==58980== --58980-- /tmp/junk:--58980-- dSYM directory is missing; consider using --dsymutil=yesUNKNOWN task message [id 3229, to mach_task_self(), reply 0x2503]UNKNOWN task message [id 3229, to mach_task_self(), reply 0x2503]UNKNOWN task message [id 3414, to mach_task_self(), reply 0x2503]--58980-- WARNING: unhandled syscall: unix:357--58980-- You may be able to write your own handler.--58980-- Read the file README_MISSING_SYSCALL_OR_IOCTL.--58980-- Nevertheless we consider this a bug.  Please report--58980-- it at http://valgrind.org/support/bug_reports.html.3.000==58980== ==58980== HEAP SUMMARY:==58980==     in use at exit: 0 bytes in 0 blocks==58980==   total heap usage: 0 allocs, 0 frees, 0 bytes allocated==58980== ==58980== All heap blocks were freed -- no leaks are possible==58980== ==58980== For counts of detected and suppressed errors, rerun with: -v==58980== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 0 from 0)