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Fixes of the gc process

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This commit is contained in:
Baptiste Wicht 2016-07-24 12:44:48 +02:00
parent b762345c49
commit d610a137e9
1 changed files with 22 additions and 9 deletions
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31
kernel/src/scheduler.cpp
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@ -95,22 +95,32 @@ void gc_task(){
logging::logf(logging::log_level::DEBUG, "Clean process %u\n", prev_pid);
//1. Release physical memory of PML4T
physical_allocator::free(desc.physical_cr3, 1);
// 1. Release physical memory of PML4T (if not system task)
if(!desc.system){
physical_allocator::free(desc.physical_cr3, 1);
}
//3. Release physical stacks
physical_allocator::free(desc.physical_kernel_stack, scheduler::kernel_stack_size / paging::PAGE_SIZE);
physical_allocator::free(desc.physical_user_stack, scheduler::user_stack_size / paging::PAGE_SIZE);
// 2. Release physical stacks (if dynamically allocated)
//4. Release segment's physical memory
if(desc.physical_kernel_stack){
physical_allocator::free(desc.physical_kernel_stack, scheduler::kernel_stack_size / paging::PAGE_SIZE);
}
if(desc.physical_user_stack){
physical_allocator::free(desc.physical_user_stack, scheduler::user_stack_size / paging::PAGE_SIZE);
}
// 3. Release segment's physical memory
for(auto& segment : desc.segments){
physical_allocator::free(segment.physical, segment.size / paging::PAGE_SIZE);
}
desc.segments.clear();
//5. Release virtual kernel stack
virtual_allocator::free(desc.virtual_kernel_stack, scheduler::kernel_stack_size / paging::PAGE_SIZE);
paging::unmap_pages(desc.virtual_kernel_stack, scheduler::kernel_stack_size / paging::PAGE_SIZE);
if(desc.virtual_kernel_stack){
virtual_allocator::free(desc.virtual_kernel_stack, scheduler::kernel_stack_size / paging::PAGE_SIZE);
paging::unmap_pages(desc.virtual_kernel_stack, scheduler::kernel_stack_size / paging::PAGE_SIZE);
}
//6. Remove process from run queue
size_t index = 0;
@ -130,6 +140,7 @@ void gc_task(){
desc.physical_cr3 = 0;
desc.physical_user_stack = 0;
desc.physical_kernel_stack = 0;
desc.virtual_kernel_stack = 0;
desc.paging_size = 0;
desc.context = nullptr;
desc.brk_start = desc.brk_end = 0;
@ -720,7 +731,7 @@ void scheduler::kill_current_process(){
}
//The GC thread will clean the resources eventually
if(pcb[gc_pid].state == process_state::WAITING){
if(pcb[gc_pid].state == process_state::BLOCKED){
unblock_process(gc_pid);
}
@ -880,8 +891,10 @@ scheduler::process_t& scheduler::create_kernel_task(char* user_stack, char* kern
process.physical_cr3 = paging::get_physical_pml4t();
process.paging_size = 0;
// Directly uses memory of the executable
process.physical_user_stack = 0;
process.physical_kernel_stack = 0;
process.virtual_kernel_stack = 0;
auto rsp = &user_stack[scheduler::user_stack_size - STACK_ALIGNMENT];
rsp -= sizeof(interrupt::syscall_regs);