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How to track down a “double free or corruption” error
...{
char *x = malloc(100);
free(x);
free(x);
return 0;
}
[sand@PS-CNTOS-64-S11 testbox]$ vim t1.c
[sand@PS-CNTOS-64-S11 testbox]$ cc -g t1.c -o t1
[sand@PS-CNTOS-64-S11 testbox]$ ./t1
*** glibc detected *** ./t1: double free or corruption (top): 0x00000000058f7010 ***
======= Backtrace: =========...
How to compile a 64-bit application using Visual C++ 2010 Express?
Is there a simple way to compile a 64 bit app with the 32-bit edition of Visual C++ 2010 Express? What configurations, if any, are necessary?
...
What is the purpose of the “final” keyword in C++11 for functions?
...ady mentioned in a comment is that if you are overriding a function from a base class, then you cannot possibly mark it as non-virtual:
struct base {
virtual void f();
};
struct derived : base {
void f() final; // virtual as it overrides base::f
};
struct mostderived : derived {
//vo...
How to maintain aspect ratio using HTML IMG tag
...hoto in our application. I have set both its height and width attribute to 64. I need to show any image resolution (e.g. 256x256, 1024x768, 500x400, 205x246, etc.) as 64x64. But by setting the height and width attributes of an img tag to 64, it's not maintaining the aspect ratio, so the image looks ...
Generate a Hash from string in Javascript
...ng-strings) and the bitwise function is actually more slow than the number based function.
– skerit
Jun 29 '12 at 21:23
17
...
What are the calling conventions for UNIX & Linux system calls (and user-space functions) on i386 an
...int $0x80
http://www.int80h.org/bsdasm/#default-calling-convention
x86-64 Linux System Call convention:
x86-64 Mac OS X is similar but different. TODO: check what *BSD does.
Refer to section: "A.2 AMD64 Linux Kernel Conventions" of System V Application Binary Interface AMD64 Architecture Proc...
C library function to perform sort
...turn -1;
else if (*x > *y) return 1; return 0;
}
4. Comparing records based on a key:
Sometimes you need to sort a more complex stuffs, such as record. Here is the simplest
way to do it using qsort library.
typedef struct {
int key;
double value;
} the_record;
int compare_function(const void...
Python executable not finding libpython shared library
...ort statements to .profile or .bashrc files. There is a one-line solution, based on the Red Hat solutions page. Thanks for the comment that points it out:
echo 'source scl_source enable rh-python35' | sudo tee --append /etc/profile.d/python35.sh
After a restart, it's all good on the shell, but so...
What does the Visual Studio “Any CPU” target mean?
...
An AnyCPU assembly will JIT to 64-bit code when loaded into a 64-bit process and 32 bit when loaded into a 32-bit process.
By limiting the CPU you would be saying: There is something being used by the assembly (something likely
unmanaged) that requires 3...
What type of hash does WordPress use?
...e stored and represented in different ways, for example as a hex string, a Base64 string, or raw data in a file. You commonly see MD5 values represented in hex, however WordPress uses Base64 instead. Your hex value would be sZRqySSS0jR8YjW00mERhA== in Base64, which uses 25% less characters than hex ...