Ever since I was introduced to C, I was told that in C dynamic memory allocation is done using the functions in the malloc family. I also learned that memory dynamically allocated using malloc is a...

I am having a problem with _sbrk. In a link phase of compilation i use below comand to link my objects and i get undefined reference to _sbrk. arm-none-eabi-ld -static -T linkerscript.ld -o exe tim...

While I know what the Unix system call brk and function sbrk do, I have no idea what they stand for. Can anyone enlighten me?

I've heard in a lot of places (musl mailing list, macOS forums, etc.) that brk() and sbrk() are unsafe. Many of these places either don't give explanations at all, or give very vague explanations. ...

c code: // program break mechanism // TLPI exercise 7-1 #include <stdio.h> #include <stdlib.h> void program_break_test() { printf("%10p\n", sbrk(0)); char *bl = malloc(1024 * 1024...

I'm trying to understand the sbrk() function. From what I know: sbrk(0) returns the current address of the break and doesn't increment it. sbrk(size) increments the address of the break by size b...

The manual page told me so much and through it I know lots of the background knowledge of memory management of "glibc". But I still get confused. does "malloc_trim(0)"(note zero...

I have tried in my machine using sbrk(1) and then deliberately write out of bound to test page size, which is 4096 bytes. But when I call malloc(1), I get SEGV after accessing 135152 bytes, which i...

I've read the linux manual about sbrk() thoroughly: sbrk() changes the location of the program break, which defines the end of the process's data segment (i.e., the program break is the first ...

I understand that the program break is the highest virtual memory address that the Linux OS has allocated for a process, and therefore marks the highest address of the heap. You can get the address...

I have read in Advanced Unix Programming (and also in a few other books) that Linux malloc() uses the Linux system call sbrk() to request memory from the operating system. I am looking at the glib...

Can anyone explain how malloc() works internally? I have sometimes done strace program and I see a lot of sbrk system calls, doing man sbrk talks about it being used in malloc() but not much...

I have an issue with memory management in various operating systems. My program is a server that does some processing that could take a few GB of memory. After that, it releases most of the memory...

Which of these calls is faster on average? I've heard that mmap is faster for smaller allocations but I haven't heard a comparison of either. Any information on performance for these would be nice....

I have a custom allocator function which uses sbrk() to obtain memory. How do I release this memory when it's no longer needed? Is there a function equivalent to free() for malloc() ? or do I hav...

Where can I read about sbrk() in some detail? How does it exactly work? In what situations would I want to use sbrk() instead of the cumbersome malloc() and new()? btw, what is the expansion for...

the following is a very very simple version of malloc() and seems to allocate some space to me, but apart from the fact that there is no free() and I don't check if I've overrun the allocated space...

I was thinking about how the Linux kernel implements system calls and I was wondering if someone could give me a high level view of how sbrk/brk work? I've reviewed the kernel code, but there is j...