MESSAGE
| DATE | 2016-11-29 |
| FROM | nylxs
|
| SUBJECT | Subject: [Learn] Look at this exciting output by my test program
|
From learn-bounces-at-nylxs.com Tue Nov 29 16:54:16 2016
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id EB/EB-10233-B971D385; Tue, 29 Nov 2016 00:52:27 -0500
To: Hangout , learn-at-nylxs.com
From: nylxs
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Date: Tue, 29 Nov 2016 00:52:27 -0500
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Subject: [Learn] Look at this exciting output by my test program
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[ruben-at-flatbush lvalue]$ make
g++ -Wall -ggdb -pg -pg -pthread -o lvalue.exe lvalue.c
[ruben-at-flatbush lvalue]$ ./lvalue.exe
4 5 6 7 8 9
6 5 4 3 2 1
*** Error in `./lvalue.exe': free(): invalid next size (fast):
0x0000000001ce6a80 ***
======= Backtrace: =========
/usr/lib/libc.so.6(+0x70c4b)[0x7fac24da2c4b]
/usr/lib/libc.so.6(+0x76fe6)[0x7fac24da8fe6]
/usr/lib/libc.so.6(+0x777de)[0x7fac24da97de]
./lvalue.exe[0x4017a7]
./lvalue.exe[0x40167c]
./lvalue.exe[0x401457]
./lvalue.exe[0x401164]
./lvalue.exe[0x400f3c]
./lvalue.exe[0x400cdf]
/usr/lib/libc.so.6(__libc_start_main+0xf1)[0x7fac24d52291]
./lvalue.exe[0x400a1a]
======= Memory map: ========
00400000-00403000 r-xp 00000000 08:06 454002297
/home/ruben/src/grad_school/thesis/lvalue/lvalue.exe
00602000-00603000 r--p 00002000 08:06 454002297
/home/ruben/src/grad_school/thesis/lvalue/lvalue.exe
00603000-00604000 rw-p 00003000 08:06 454002297
/home/ruben/src/grad_school/thesis/lvalue/lvalue.exe
01cd3000-01cf5000 rw-p 00000000 00:00 0
[heap]
7fac20000000-7fac20021000 rw-p 00000000 00:00 0
7fac20021000-7fac24000000 ---p 00000000 00:00 0
7fac24d32000-7fac24ec7000 r-xp 00000000 08:05 33580983
/usr/lib/libc-2.24.so
7fac24ec7000-7fac250c6000 ---p 00195000 08:05 33580983
/usr/lib/libc-2.24.so
7fac250c6000-7fac250ca000 r--p 00194000 08:05 33580983
/usr/lib/libc-2.24.so
7fac250ca000-7fac250cc000 rw-p 00198000 08:05 33580983
/usr/lib/libc-2.24.so
7fac250cc000-7fac250d0000 rw-p 00000000 00:00 0
7fac250d0000-7fac250e8000 r-xp 00000000 08:05 33580546
/usr/lib/libpthread-2.24.so
7fac250e8000-7fac252e7000 ---p 00018000 08:05 33580546
/usr/lib/libpthread-2.24.so
7fac252e7000-7fac252e8000 r--p 00017000 08:05 33580546
/usr/lib/libpthread-2.24.so
7fac252e8000-7fac252e9000 rw-p 00018000 08:05 33580546
/usr/lib/libpthread-2.24.so
7fac252e9000-7fac252ed000 rw-p 00000000 00:00 0
7fac252ed000-7fac25303000 r-xp 00000000 08:05 33580527
/usr/lib/libgcc_s.so.1
7fac25303000-7fac25502000 ---p 00016000 08:05 33580527
/usr/lib/libgcc_s.so.1
7fac25502000-7fac25503000 r--p 00015000 08:05 33580527
/usr/lib/libgcc_s.so.1
7fac25503000-7fac25504000 rw-p 00016000 08:05 33580527
/usr/lib/libgcc_s.so.1
7fac25504000-7fac25607000 r-xp 00000000 08:05 39112638
/usr/lib/libm-2.24.so
7fac25607000-7fac25806000 ---p 00103000 08:05 39112638
/usr/lib/libm-2.24.so
7fac25806000-7fac25807000 r--p 00102000 08:05 39112638
/usr/lib/libm-2.24.so
7fac25807000-7fac25808000 rw-p 00103000 08:05 39112638
/usr/lib/libm-2.24.so
7fac25808000-7fac25980000 r-xp 00000000 08:05 33581159
/usr/lib/libstdc++.so.6.0.22
7fac25980000-7fac25b80000 ---p 00178000 08:05 33581159
/usr/lib/libstdc++.so.6.0.22
7fac25b80000-7fac25b8a000 r--p 00178000 08:05 33581159
/usr/lib/libstdc++.so.6.0.22
7fac25b8a000-7fac25b8c000 rw-p 00182000 08:05 33581159
/usr/lib/libstdc++.so.6.0.22
7fac25b8c000-7fac25b90000 rw-p 00000000 00:00 0
7fac25b90000-7fac25bb3000 r-xp 00000000 08:05 33580982
/usr/lib/ld-2.24.so
7fac25d67000-7fac25d6d000 rw-p 00000000 00:00 0
7fac25db1000-7fac25db2000 rw-p 00000000 00:00 0
7fac25db2000-7fac25db3000 r--p 00022000 08:05 33580982
/usr/lib/ld-2.24.so
7fac25db3000-7fac25db4000 rw-p 00023000 08:05 33580982
/usr/lib/ld-2.24.so
7fac25db4000-7fac25db5000 rw-p 00000000 00:00 0
7ffeae632000-7ffeae653000 rw-p 00000000 00:00 0
[stack]
7ffeae7de000-7ffeae7e1000 r--p 00000000 00:00 0
[vvar]
7ffeae7e1000-7ffeae7e3000 r-xp 00000000 00:00 0
[vdso]
ffffffffff600000-ffffffffff601000 r-xp 00000000 00:00 0
[vsyscall]
Aborted
I wish someone was around who know C++ enough to diagnose this
/*
*
=====================================================================================
*
* Filename: lvalue.c
*
* Description: test of vector being used as an lvalue
*
* Version: 1.0
* Created: 11/28/2016 12:31:54 PM
* Revision: none
* Compiler: gcc
*
* Author: Ruben Safir (mn), ruben-at-mrbrklyn.com
* Company: NYLXS Inc
*
*
=====================================================================================
*/
#include
#include
namespace vect{
/*
*
=====================================================================================
* Class: Lvalue
* Description: testing vector access as an lvalue
*
=====================================================================================
*/
template < class T >
class Lvalue
{
public:
// ==================== LIFECYCLE
=======================================
Lvalue (){}; /*
constructor */
Lvalue (std::vector in):
_ofthings{in}{}; /* constructor */
Lvalue ( const Lvalue &other ); /* copy constructor */
~Lvalue (){}; /*
destructor */
/* ==================== ACCESSORS
======================================= */
T& ofthings(){
return _ofthings;
};
void ofthings(std::vector const vec){
_ofthings = vec;
};
/* ==================== MUTATORS
======================================= */
/* ==================== OPERATORS
======================================= */
const Lvalue& operator = ( const Lvalue &other ); //
assignment operator
const T& operator [] (int index)
{
return ofthings()[index];
};
friend std::ostream &operator << (std::ostream &os,
Lvalue in)
{
for(int i = 0; i < in._ofthings.size(); i++ ){
std::cout << i << "\t";
}
return os;
};
/* ==================== DATA MEMBERS
======================================= */
protected:
std::vector _ofthings;
private:
}; /* ----- end of template class Lvalue ----- */
};
int main ( int argc, char *argv[] )
{
std::vector test {0};
for(int i = 0; i<10; i++ ){
test[i] = i;
std::cout << test[i] << "\t";
}
std::cout << std::endl;
vect::Lvalue test2 {test};
for(int j=0, i = 10; i>0; i--, j++){
test[j] = i;
std::cout << test[j] << "\t";
}
std::cout << std::endl;
return EXIT_SUCCESS;
} /* ---------- end of function main ---------- */
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