Sign Up to our social questions and Answers Engine to ask questions, answer people’s questions, and connect with other people.
Login to our social questions & Answers Engine to ask questions answer people’s questions & connect with other people.
Lost your password? Please enter your email address. You will receive a link and will create a new password via email.
Please briefly explain why you feel this question should be reported.
Please briefly explain why you feel this answer should be reported.
Please briefly explain why you feel this user should be reported.
Are shared objects separately loaded for each process or one shared object is shared among them? For example, let’s say that some program uses libc.so. Then two processes of this program are launched. Will be this shared object loaded TWO times for each process in their memory area OR will it be loaded somewhere in memory ONCE and mapped in memory of two processes?
Shared objects are loaded via
mmap()with theMAP_PRIVATEflag. This means that these are copy-on-write mappings, they initially point to the same memory, but once any of them is modified, it is copied and “unshared” before the modification.