Fix so that O3CPU doesnt segfault on exit.

Major thing was to not execute commit if there are no active threads in CPU.

src/cpu/o3/alpha/thread_context.hh:
    call deallocate instead of deallocateContext
src/cpu/o3/commit_impl.hh:
    dont run commit stage if there are no instructions
src/cpu/o3/cpu.cc:
    add deallocate event, deactivateThread function, and edit deallocateContext.
src/cpu/o3/cpu.hh:
    add deallocate event and add optional delay to deallocateContext
src/cpu/o3/thread_context.hh:
    optional delay for deallocate
src/cpu/o3/thread_context_impl.hh:
    edit DPRINTFs to say Thread Context instead of Alpha TC
src/cpu/thread_context.hh:
    optional delay
src/sim/syscall_emul.hh:
    name stuff

--HG--
extra : convert_revision : f4033e1f66b3043d30ad98dcc70d8b193dea70b6

1 files changed, 8 insertions, 7 deletions

diff --git a/src/cpu/o3/alpha/thread_context.hh b/src/cpu/o3/alpha/thread_context.hh
index 78b0ee788..ad52b0d2e 100644
--- a/src/cpu/o3/alpha/thread_context.hh
+++ b/src/cpu/o3/alpha/thread_context.hh
@@ -70,18 +70,19 @@ class AlphaTC : public O3ThreadContext<Impl>
     { panic("Not supported on Alpha!"); }
 
 
-    // This function exits the thread context in the CPU and returns
-    // 1 if the CPU has no more active threads (meaning it's OK to exit);
-    // Used in syscall-emulation mode when a thread executes the 'exit'
-    // syscall.
+    /** This function exits the thread context in the CPU and returns
+     * 1 if the CPU has no more active threads (meaning it's OK to exit);
+     * Used in syscall-emulation mode when a thread executes the 'exit'
+     * syscall.
+     */
     virtual int exit()
     {
-        this->cpu->deallocateContext(this->thread->readTid());
+        this->deallocate();
 
         // If there are still threads executing in the system
         if (this->cpu->numActiveThreads())
-            return 0;
+            return 0; // don't exit simulation
         else
-            return 1;
+            return 1; // exit simulation
     }
 };