Comments on: 7.9 — The stack and the heap http://www.learncpp.com/cpp-tutorial/79-the-stack-and-the-heap/ Wed, 19 Nov 2008 17:15:45 +0000 http://wordpress.org/?v=2.5.1 By: Alex http://www.learncpp.com/cpp-tutorial/79-the-stack-and-the-heap/#comment-31816 Alex Sat, 08 Nov 2008 19:25:23 +0000 http://www.learncpp.com/cpp-tutorial/79-the-stack-and-the-heap/#comment-31816 It appears that way. I've never used alloca. It's not part of standard C either, so I would avoid it's use. It appears that way. I’ve never used alloca. It’s not part of standard C either, so I would avoid it’s use.

]]> By: som shekhar http://www.learncpp.com/cpp-tutorial/79-the-stack-and-the-heap/#comment-31653 som shekhar Wed, 05 Nov 2008 11:18:24 +0000 http://www.learncpp.com/cpp-tutorial/79-the-stack-and-the-heap/#comment-31653 Sorry its not malloc ..its alloca.. i guess alloca dynamically creates memory on stack? Sorry its not malloc ..its alloca..
i guess alloca dynamically creates memory on stack?

]]> By: Alex http://www.learncpp.com/cpp-tutorial/79-the-stack-and-the-heap/#comment-31636 Alex Wed, 05 Nov 2008 06:38:56 +0000 http://www.learncpp.com/cpp-tutorial/79-the-stack-and-the-heap/#comment-31636 I don't understand the question. Malloc allocates memory on the heap. For those of you who don't know what malloc is, it's the old C-style way of dynamically allocating memory. In C++, it is essentially deprecated in favor of the new operator. I don’t understand the question. Malloc allocates memory on the heap. For those of you who don’t know what malloc is, it’s the old C-style way of dynamically allocating memory. In C++, it is essentially deprecated in favor of the new operator.

]]> By: som shekhar http://www.learncpp.com/cpp-tutorial/79-the-stack-and-the-heap/#comment-31579 som shekhar Tue, 04 Nov 2008 08:08:58 +0000 http://www.learncpp.com/cpp-tutorial/79-the-stack-and-the-heap/#comment-31579 Since malloc also allocates the size dynamically but it does on stack??? why? Since malloc also allocates the size dynamically but it does on stack??? why?

]]> By: Learn C++ - » 15.3 — Exceptions, functions, and stack unwinding http://www.learncpp.com/cpp-tutorial/79-the-stack-and-the-heap/#comment-30972 Learn C++ - » 15.3 — Exceptions, functions, and stack unwinding Sat, 25 Oct 2008 18:42:59 +0000 http://www.learncpp.com/cpp-tutorial/79-the-stack-and-the-heap/#comment-30972 [...] is found, or until main() terminates. This process is called unwinding the stack (see the lesson on the stack and the heap if you need a refresher on what the call stack [...] [...] is found, or until main() terminates. This process is called unwinding the stack (see the lesson on the stack and the heap if you need a refresher on what the call stack [...]

]]> By: Learn C++ - » 7.8 — Function Pointers http://www.learncpp.com/cpp-tutorial/79-the-stack-and-the-heap/#comment-13494 Learn C++ - » 7.8 — Function Pointers Tue, 29 Apr 2008 05:05:09 +0000 http://www.learncpp.com/cpp-tutorial/79-the-stack-and-the-heap/#comment-13494 [...] 2007 Prev/Next Posts « 7.7 — Default parameters | Home | 7.9 — The stack and the heap » Wednesday, August 8th, 2007 at 4:52 [...] [...] 2007 Prev/Next Posts « 7.7 — Default parameters | Home | 7.9 — The stack and the heap » Wednesday, August 8th, 2007 at 4:52 [...]

]]> By: Alex http://www.learncpp.com/cpp-tutorial/79-the-stack-and-the-heap/#comment-13002 Alex Fri, 25 Apr 2008 02:24:30 +0000 http://www.learncpp.com/cpp-tutorial/79-the-stack-and-the-heap/#comment-13002 I won't say there isn't a way to determine the stack size, but I'm not aware of how to do it. In reality, the stack is large enough that it's generally not an issue as long as you're aware that you should use dynamic allocation for anything that requires a large amount of memory. I won’t say there isn’t a way to determine the stack size, but I’m not aware of how to do it.

In reality, the stack is large enough that it’s generally not an issue as long as you’re aware that you should use dynamic allocation for anything that requires a large amount of memory.

]]> By: Jeff http://www.learncpp.com/cpp-tutorial/79-the-stack-and-the-heap/#comment-12951 Jeff Thu, 24 Apr 2008 22:05:55 +0000 http://www.learncpp.com/cpp-tutorial/79-the-stack-and-the-heap/#comment-12951 Alex, This is a really good section, very helpful for me! Quick question: Other than writing a function or program to test limits until it crashes, is there an easier to way to determine the size, or amount of memory, allocated to the call stack for a particular program? Wouldn't knowing this in advance help to avoid stack overflow in more complex programs? Thanks, Jeff Alex,

This is a really good section, very helpful for me! Quick question:

Other than writing a function or program to test limits until it crashes, is there an easier to way to determine the size, or amount of memory, allocated to the call stack for a particular program? Wouldn’t knowing this in advance help to avoid stack overflow in more complex programs?

Thanks,
Jeff

]]> By: Tom http://www.learncpp.com/cpp-tutorial/79-the-stack-and-the-heap/#comment-10265 Tom Mon, 24 Mar 2008 15:52:29 +0000 http://www.learncpp.com/cpp-tutorial/79-the-stack-and-the-heap/#comment-10265 Hi Alex - Good description of the stack. A few minor corrections: "The plate analogy is <b>a</b> pretty good analogy" Under "The stack in action", items 5 & 6 need periods at the end of the sentences. Under "When the function terminates...": "The <b>address of the</b> next instruction to execute is popped off the stack, and the CPU resumes execution at that instruction." Keep up the good work! [ Thanks! -Alex ] Hi Alex -

Good description of the stack. A few minor corrections:

“The plate analogy is a pretty good analogy”

Under “The stack in action”, items 5 & 6 need periods at the end of the sentences.

Under “When the function terminates…”:

“The address of the next instruction to execute is popped off the stack, and the CPU resumes execution at that instruction.”

Keep up the good work!

[ Thanks! -Alex ]

]]> By: Alex http://www.learncpp.com/cpp-tutorial/79-the-stack-and-the-heap/#comment-5864 Alex Fri, 11 Jan 2008 16:10:11 +0000 http://www.learncpp.com/cpp-tutorial/79-the-stack-and-the-heap/#comment-5864 According to <a href="http://en.wikipedia.org/wiki/Stack-based_memory_allocation" rel="nofollow">Wikipedia</a>, "In most modern computer systems, each thread has a reserved region of memory referred to as its stack". So it's just RAM memory being used in a stack-like manner. As soon as the thread/program is killed, that memory can be reused for other stuff. According to Wikipedia, “In most modern computer systems, each thread has a reserved region of memory referred to as its stack”. So it’s just RAM memory being used in a stack-like manner. As soon as the thread/program is killed, that memory can be reused for other stuff.

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