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[tools] Add j6threads gdb command

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The j6threads command shows the current thread, ready threads, and
blocked threads for a given CPU.

To support this, TCB structs gained a pointer to their thread (instead
of trying to do offset magic) and threads gained a pointer to their
creator. Also removed thread::from_tcb() now that the TCB has a pointer.
This commit is contained in:
Justin C. Miller
2022-01-15 17:39:25 -08:00
parent 7bb6b21c65
commit 2dd78beb92
5 changed files with 115 additions and 46 deletions
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10
src/kernel/objects/thread.cpp
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@@ -24,12 +24,14 @@ thread::thread(process &parent, uint8_t pri, uintptr_t rsp0) :
{
parent.space().initialize_tcb(m_tcb);
m_tcb.priority = pri;
m_tcb.thread = this;
if (!rsp0)
setup_kernel_stack();
else
m_tcb.rsp0 = rsp0;
m_creator = current_cpu().thread;
m_self_handle = parent.add_handle(this);
}
@@ -38,14 +40,6 @@ thread::~thread()
g_kernel_stacks.return_section(m_tcb.kernel_stack);
}
thread *
thread::from_tcb(TCB *tcb)
{
static ptrdiff_t offset =
-1 * static_cast<ptrdiff_t>(offsetof(thread, m_tcb));
return reinterpret_cast<thread*>(util::offset_pointer(tcb, offset));
}
thread & thread::current() { return *current_cpu().thread; }
inline void schedule_if_current(thread *t) { if (t == current_cpu().thread) scheduler::get().schedule(); }