C: Free (): thinking about invalid pointer abort (core dump)

Catalog

Use valgrind Screening errors

Some errors appear and their solutions

When running the program , Report errors （ Pictured ）：

free(): invalid pointer Aborted

Use valgrind Screening errors

valgrind Use methods and their commands in another blog ：http://t.csdn.cn/tAsfN

Read the following information ：

Some errors appear and their solutions

Reference from  http://t.csdn.cn/iQvuu

 Use of uninitialised value of size 4
// Uninitialized address used ,  At this time, you should check whether the program uses uninitialized pointers 

 Address 0x0 is not stack’d, malloc’d or (recently) free’d
// The reason for this error is to write a value to the wrong address ,  At this time, we should also check that the program assigns values with uninitialized pointers ,  Or the pointer is not assigned .

 Conditional jump or move depends on uninitialised value(s)
// The reason for this error is that the variable used is not initialized 

Invalid free() / delete / delete[] / realloc()
// The reason for this error is free Lost the space that doesn't belong to you ,  The reason for the error may be that the memory pointed to by the pointer no longer belongs to it 

 HEAP SUMMARY:
in use at exit: 412 bytes in 1 blocks
total heap usage: 2 allocs, 1 frees, 924 bytes allocated
// The last one is heap memory analysis ,  As indicated above ,  When the program exits ,  There is still a 412 The space of bytes is not free

  But my program doesn't use malloc Allocate memory , Then I'll go on to screen the cause of the error ：

It may be a lack of libtcmalloc-minimal4 library

sudo apt-get install libtcmalloc-minimal4
// install 

vim ~/.bashrc
// Modify the configuration file 

export LD_PRELOAD="/usr/lib/libtcmalloc_minimal.so.4"
// Add the library path to the configuration file 

source ~/.bashrc
// Execute configuration file 

Look at the file path ：ldconfig -p |grep libtcmalloc_minimal.so.4