Put current process to sleep.

Sun Apr  3 17:03:33 2005  Soeren Sandmann  <sandmann@redhat.com>

	* sysprof-module.c (queue_generate_stack_trace): Put current
	process to sleep.

	* sysprof-module.c (do_generate): Wake up the traced process

diff --git a/ChangeLog b/ChangeLog
index e9e09b7..da3e1d6 100644 (file)
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,10 @@
+Sun Apr  3 17:03:33 2005  Soeren Sandmann  <sandmann@redhat.com>
+
+       * sysprof-module.c (queue_generate_stack_trace): Put current
+       process to sleep.
+
+       * sysprof-module.c (do_generate): Wake up the traced process
+
 Thu Mar 31 23:09:09 2005  Soeren Sandmann  <sandmann@redhat.com>
 
        * sysprof.c (build_gui): Remove stray %

diff --git a/sysprof-module.c b/sysprof-module.c
index d70cb8f..3915d6b 100644 (file)
--- a/sysprof-module.c
+++ b/sysprof-module.c
@@ -237,7 +237,7 @@ generate_stack_trace(struct task_struct *task,
        
        trace->pid = task->pid;
        trace->truncated = 0;
-       
+
        trace->addresses[0] = (void *)regs->eip;
 
        i = 1;
@@ -262,15 +262,16 @@ generate_stack_trace(struct task_struct *task,
 
 struct work_struct work;
 static int in_queue;
+static int saved_state;
+
+DECLARE_WAIT_QUEUE_HEAD (wait_to_be_scanned);
 
 static void
 do_generate (void *data)
 {
        struct task_struct *task = data;
        struct task_struct *g, *p;
-
-       in_queue = 0;
-
+       
        /* Make sure the thread still exists */
        do_each_thread (g, p) {
                if (p == task) {
@@ -281,9 +282,13 @@ do_generate (void *data)
                        
                        wake_up (&wait_for_trace);
                        
-                       return;
+                       goto out;
                }
        } while_each_thread (g, p);
+
+ out:
+       wake_up_process (task);
+       in_queue = 0;
 }
 
 static void
@@ -292,11 +297,18 @@ queue_generate_stack_trace (struct task_struct *cur)
        if (in_queue)
                return;
 
-       in_queue = 1;
+#if 0
+       printk(KERN_ALERT "qst: current: %d\n", current? current->pid : -1);
+#endif
        
        INIT_WORK (&work, do_generate, cur);
 
+       in_queue = 1;
+       
        schedule_work (&work);
+
+       saved_state = cur->state;
+       set_task_state (cur, TASK_UNINTERRUPTIBLE);
 }
 
 static void