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Updates

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Sat Apr 30 15:44:12 2005  Søren Sandmann  <sandmann@redhat.com>

        * TODO: Updates

        * sysprof-module.c (get_regs): Change the way we get registers for
        a task so that it works with 2.6.11
This commit is contained in:
Søren Sandmann
2005-04-30 19:50:29 +00:00
committed by Søren Sandmann Pedersen
parent cd07b6f274
commit 914d8bf668
3 changed files with 41 additions and 4 deletions
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7
ChangeLog
View File

@ -1,3 +1,10 @@
Sat Apr 30 15:44:12 2005 Søren Sandmann <sandmann@redhat.com>
* TODO: Updates
* sysprof-module.c (get_regs): Change the way we get registers for
a task so that it works with 2.6.11
Sat Apr 23 19:17:18 2005 Søren Sandmann <sandmann@redhat.com>
* TODO: Updates

3
TODO
View File

@ -112,6 +112,9 @@ Before 1.2:
Later:
- Applications should be able to say "start profiling", "stop profiling"
so that you can limit the profiling to specific areas.
- Find out how to hack around gtk+ bug causing multiple double clicks
to get eaten.

35
sysprof-module.c
View File

@ -121,9 +121,9 @@ x_access_process_vm (struct task_struct *tsk,
ret = get_user_pages(tsk, mm, addr, 1,
write, 1, &page, &vma);
if (ret <= 0)
if (ret <= 0) {
break;
}
bytes = len;
offset = addr & (PAGE_SIZE-1);
if (bytes > PAGE_SIZE-offset)
@ -188,6 +188,8 @@ page_readable (userspace_reader *reader, unsigned long address)
return result;
#endif
return 1;
}
static int
@ -208,8 +210,9 @@ read_user_space (userspace_reader *reader,
r = x_access_process_vm (reader->task, cache_address,
reader->cache, PAGE_SIZE, 0);
if (r != PAGE_SIZE)
if (r != PAGE_SIZE) {
return 0;
}
reader->cache_address = cache_address;
}
@ -250,6 +253,25 @@ read_frame (userspace_reader *reader, unsigned long addr, StackFrame *frame)
return 1;
}
static struct pt_regs *
get_regs (struct task_struct *task)
{
/* This seems to work in Linux 2.6.11 */
void *stack_top = (void *)task->thread.esp0;
return stack_top - sizeof(struct pt_regs);
#if 0
/* This used to work, but doesn't anymore */
return ((struct pt_regs *) (THREAD_SIZE + (unsigned long) task->thread_info)) - 1;
#endif
#if 0
/* One might suspect that this would work, but it doesn't
*/
return task_pt_regs (task);
#endif
}
static void
generate_stack_trace(struct task_struct *task,
SysprofStackTrace *trace)
@ -259,7 +281,8 @@ generate_stack_trace(struct task_struct *task,
#else
# define START_OF_STACK 0xBFFFFFFF
#endif
struct pt_regs *regs = ((struct pt_regs *) (THREAD_SIZE + (unsigned long) task->thread_info)) - 1;
struct pt_regs *regs = get_regs (task); // task->thread.regs;
StackFrame frame;
unsigned long addr;
userspace_reader reader;
@ -276,6 +299,10 @@ generate_stack_trace(struct task_struct *task,
addr = regs->ebp;
#if 0
printk (KERN_ALERT "ebp: %p\n", regs->ebp);
#endif
if (init_userspace_reader (&reader, task))
{
while (i < SYSPROF_MAX_ADDRESSES &&