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Work on debugging race conditions.

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Ports and channels have been moved to the kernel pool, since they've
been known to outlive their associated task. This probably isn't the
right thing to do, the life cycle needs fixed instead.

Some refactorying in memory_region.cpp. Added a helper function to
increment and decrement the allocation counter. This makes it easier
to switch between atomic and non-atomic increments. Using atomic
increments for now, although this still does not fix the problem.
This commit is contained in:
Eric Holk
2011-07-07 11:53:08 -07:00
parent dcd2563a3a
commit 8acadb17c2
10 changed files with 91 additions and 36 deletions
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3
src/rt/rust_task.cpp
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@@ -401,6 +401,7 @@ rust_task::transition(rust_task_list *src, rust_task_list *dst) {
void
rust_task::block(rust_cond *on, const char* name) {
scoped_lock with(lock);
LOG(this, task, "Blocking on 0x%" PRIxPTR ", cond: 0x%" PRIxPTR,
(uintptr_t) on, (uintptr_t) cond);
A(sched, cond == NULL, "Cannot block an already blocked task.");
@@ -413,6 +414,7 @@ rust_task::block(rust_cond *on, const char* name) {
void
rust_task::wakeup(rust_cond *from) {
scoped_lock with(lock);
A(sched, cond != NULL, "Cannot wake up unblocked task.");
LOG(this, task, "Blocked on 0x%" PRIxPTR " woken up on 0x%" PRIxPTR,
(uintptr_t) cond, (uintptr_t) from);
@@ -430,6 +432,7 @@ rust_task::wakeup(rust_cond *from) {
void
rust_task::die() {
scoped_lock with(lock);
transition(&sched->running_tasks, &sched->dead_tasks);
}