varun-r-mallya/sysprof
1
0
Fork 0
mirror of https://github.com/varun-r-mallya/sysprof.git synced 2026-02-10 07:00:53 +00:00
Code Issues Packages Projects Releases Wiki Activity

*** empty log message ***

Browse Source
This commit is contained in:
Søren Sandmann Pedersen
2004-11-02 14:48:19 +00:00
parent 9140810664
commit 786bef0abb
1 changed files with 23 additions and 7 deletions
Download Patch File Download Diff File Expand all files Collapse all files

28
sysprof-module.c
View File

@ -18,6 +18,7 @@
#include "sysprof-module.h" #include "sysprof-module.h"
MODULE_LICENSE("GPL"); MODULE_LICENSE("GPL");
MODULE_AUTHOR("Soeren Sandmann (sandmann@daimi.au.dk)"); MODULE_AUTHOR("Soeren Sandmann (sandmann@daimi.au.dk)");
@ -42,8 +43,9 @@ static struct timer_list timer;
static void static void
init_timeout (void) init_timeout (void)
{ {
init_timer(&timer); printk (KERN_ALERT "init timeout\n");
timer.function = on_timer; timer.function = on_timer;
init_timer(&timer);
} }
static void static void
@ -89,6 +91,9 @@ read_user_space (userspace_reader *reader,
if (user_page == 0) if (user_page == 0)
return 0; return 0;
printk (KERN_ALERT "locking\n");
spin_lock(&reader->task->mm->page_table_lock);
if (!reader->user_page || user_page != reader->user_page) { if (!reader->user_page || user_page != reader->user_page) {
int found; int found;
struct page *page; struct page *page;
@ -102,12 +107,19 @@ read_user_space (userspace_reader *reader,
1, 0, 0, &page, NULL); 1, 0, 0, &page, NULL);
if (!found) if (!found)
{
printk (KERN_ALERT "unlocking\n");
spin_unlock(&reader->task->mm->page_table_lock);
return 0; return 0;
}
reader->kernel_page = (unsigned long)kmap (page); reader->kernel_page = (unsigned long)kmap (page);
reader->page = page; reader->page = page;
} }
printk (KERN_ALERT "unlocking\n");
spin_unlock(&reader->task->mm->page_table_lock);
if (get_user (res, (int *)(reader->kernel_page + (address - user_page))) != 0) if (get_user (res, (int *)(reader->kernel_page + (address - user_page))) != 0)
return 0; return 0;
@ -199,6 +211,8 @@ do_generate (void *data)
in_queue = 0; in_queue = 0;
printk (KERN_ALERT "do_generate\n");
/* Make sure the task still exists */ /* Make sure the task still exists */
for_each_process (p) for_each_process (p)
if (p == task) if (p == task)
@ -207,6 +221,7 @@ do_generate (void *data)
go_ahead: go_ahead:
generate_stack_trace(task, head); generate_stack_trace(task, head);
printk (KERN_ALERT "generated stack\n");
if (head++ == &stack_traces[N_TRACES - 1]) if (head++ == &stack_traces[N_TRACES - 1])
head = &stack_traces[0]; head = &stack_traces[0];
@ -214,7 +229,7 @@ do_generate (void *data)
} }
static void static void
queue_stack (struct task_struct *cur) queue_generate_stack_trace (struct task_struct *cur)
{ {
if (in_queue) if (in_queue)
return; return;
@ -230,13 +245,14 @@ static void
on_timer(unsigned long dong) on_timer(unsigned long dong)
{ {
static int n_ticks = 0; static int n_ticks = 0;
task_t *task = current;
++n_ticks; ++n_ticks;
if (current && current->pid != 0) printk (KERN_ALERT "on timer\n");
{
queue_stack (current); if (task && task->pid != 0)
} queue_generate_stack_trace (task);
add_timeout (INTERVAL, on_timer); add_timeout (INTERVAL, on_timer);
} }