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Kernel+LibPthread: pthread_create handles pthread_attr_t

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Add an initial implementation of pthread attributes for:
  * detach state (joinable, detached)
  * schedule params (just priority)
  * guard page size (as skeleton) (requires kernel support maybe?)
  * stack size and user-provided stack location (4 or 8 MB only, must be aligned)

Add some tests too, to the thread test program.

Also, LibC: Move pthread declarations to sys/types.h, where they belong.
This commit is contained in:
Andrew Kaster 2019-11-17 20:08:10 -07:00 • committed by Andreas Kling
parent aae26a3a1e
commit 618aebdd8a
9 changed files with 596 additions and 23 deletions
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14
Kernel/Syscall.h
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@ -248,6 +248,20 @@ struct SC_setsockopt_params {
socklen_t value_size;
};
struct SC_create_thread_params {
unsigned int m_detach_state = 0; // JOINABLE or DETACHED
int m_schedule_priority = 2; // ThreadPriority::Normal
// FIXME: Implment guard pages in create_thread (unreadable pages at "overflow" end of stack)
// "If an implementation rounds up the value of guardsize to a multiple of {PAGESIZE},
// a call to pthread_attr_getguardsize() specifying attr shall store in the guardsize
// parameter the guard size specified by the previous pthread_attr_setguardsize() function call"
// ... ok, if you say so posix. Guess we get to lie to people about guard page size
unsigned int m_guard_page_size = 0; // Rounded up to PAGE_SIZE
unsigned int m_reported_guard_page_size = 0; // The lie we tell callers
unsigned int m_stack_size = 4 * MB; // Default PTHREAD_STACK_MIN
void* m_stack_location = nullptr; // nullptr means any, o.w. process virtual address
};
void initialize();
int sync();