From: Soeren Sandmann <sandmann@redhat.com>
Date: Sun, 3 Apr 2005 22:06:00 +0000 (+0000)
Subject: Put current process to sleep.
X-Git-Tag: sysprof-0.9~35
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=6c408203c2e41bfd4fd98b2a347cfde36ac2ad00;p=platform%2Fupstream%2Fsysprof.git

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
--- 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
--- 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