Object Stats Collection #254
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Overview
PR partially addresses #231. Users need to query different objects in their processes. To do this, we want to provide one system call that allows a user to specify the type of object they are querying and provide a statistics structure.
Function format
int syscall_object_stats(int fd, void * stats, int object_type);fd - file descriptor to object
stats - pointer to a stats struct object
object_type - integer corresponding to what kind of object the user wants to query. There are #defined directives in include/kernel/stats.h to make these more human readable.
Objects that can be queried
Testing
Created the file "objectstats.c" in user/ in order to test that each of these stats calls work.
Notes
For Graphics and Device stats collection, the user needs to go through the console and file objects, respectively. So, for a device, the user would make the call
syscall_object_stats(fd, &device_stats, DEVICE_TYPE);where fd is a file descriptor for a file. This is because there is no way to access either of these from the userspace directly.