On modern operating systems, each process has its own address space and addresses are only valid within a process. If you want to execute code in some other process, you either have to inject a shared library or attach your program as a debugger. Once you are in the other program’s address space, this code … Read more
id is the method you want to use: to convert it to hex: hex(id(variable_here)) For instance: x = 4 print hex(id(x)) Gave me: 0x9cf10c Which is what you want, right? (Fun fact, binding two variables to the same int may result in the same memory address being used.) Try: x = 4 y = 4 … Read more
It depends on how you address the data. If you use 32 bits to address each bit, you can address 232 bits or 4Gb = 512MB. If you address bytes like most current architectures it will give you 4GB. But if you address much larger blocks you will need less bits to address 4GB. For … Read more
I suggest that you download the full software developer’s manual. The documentation is available in separate volumes, but that link gives you all seven volumes in a single massive PDF, which makes it easier to search for things. The answer is in section 3.3.7.1. The first line of that section states In 64-bit mode, an … Read more
The C and C++ standards do not support this feature. However, the GNU Compiler Collection (GCC) includes a non-standard extension for doing this, as described in the Labels as Values section of the Using the GNU Compiler Collection manual. Essentially, they have added a special unary operator && that reports the address of the label … Read more
You are looking at the default representation of a function object. It provides you with a name and a unique id, which in CPython happens to be a memory address. You cannot access it using the address; the memory address is only used to help you distinguish between function objects. In other words, if you … Read more
func unsafeAddressOf(object: AnyObject) -> UnsafePointer<Void> takes an AnyObject parameter, i.e. an instance of a class. It returns the pointer to the storage used for the object referenced by object. addressOf() cannot be used with struct variables: struct Foo { } var f = Foo() let a = unsafeAddressOf(f) // error: cannot invoke ‘unsafeAddressOf’ with an … Read more
There is a major difference between slices and maps: Slices are backed by a backing array and maps are not. If a map grows or shrinks a potential pointer to a map element may become a dangling pointer pointing into nowhere (uninitialised memory). The problem here is not “confusion of the user” but that it … Read more
If it would be possible at all, it would be very dependent on the javascript engine. The more modern javascript engine compile their code using a just in time compiler and messing with their internal variables would be either bad for performance, or bad for stability. If the engine allows it, why not make a … Read more
Note: This is for reference types. Swift 4/5: print(Unmanaged.passUnretained(someVar).toOpaque()) Prints the memory address of someVar. (thanks to @Ying) Swift 3.1: print(Unmanaged<AnyObject>.passUnretained(someVar as AnyObject).toOpaque()) Prints the memory address of someVar.