varun-r-mallya/sysprof
1
0
Fork 0
mirror of https://github.com/varun-r-mallya/sysprof.git synced 2025-12-31 20:36:25 +00:00
Code Issues Packages Projects Releases Wiki Activity

Return ssize_t instead of int.

Browse Source 
Sun Nov 18 13:23:39 2007  Søren Sandmann  <sandmann@redhat.com>

        * module/sysprof-module.c (sysprof_read): Return ssize_t instead
        of int.

        * module/sysprof-module.c (heuristic_trace): Beginning of
        heuristic user stack scanning.



svn path=/trunk/; revision=391
This commit is contained in:
Søren Sandmann
2007-11-18 18:29:34 +00:00
committed by Søren Sandmann Pedersen
parent f7a138fa15
commit a68837a3ad
2 changed files with 48 additions and 20 deletions
Download Patch File Download Diff File Expand all files Collapse all files

8
ChangeLog
View File

@ -1,3 +1,11 @@
Sun Nov 18 13:23:39 2007 Søren Sandmann <sandmann@redhat.com>
* module/sysprof-module.c (sysprof_read): Return ssize_t instead
of int.
* module/sysprof-module.c (heuristic_trace): Beginning of
heuristic user stack scanning.
2007-11-17 Soren Sandmann <sandmann@daimi.au.dk>
* collector.c (collector_create_profile): Don't collect traces here.

60
module/sysprof-module.c
View File

@ -112,6 +112,37 @@ minimum (int a, int b)
return a > b ? b : a;
}
static void
framepointer_trace (struct pt_regs *regs, SysprofStackTrace *trace)
{
void *framepointer;
int i;
StackFrame frame;
i = 0;
trace->addresses[i++] = (void *)regs->REG_INS_PTR;
framepointer = (void *)regs->REG_FRAME_PTR;
while (read_frame (framepointer, &frame) == 0 &&
i < SYSPROF_MAX_ADDRESSES &&
(unsigned long)framepointer >= regs->REG_STACK_PTR)
{
trace->addresses[i++] = (void *)frame.return_address;
framepointer = (StackFrame *)frame.next;
}
trace->n_addresses = i;
}
static void
heuristic_trace (struct pt_regs *regs,
SysprofStackTrace *trace)
{
return framepointer_trace (regs, trace);
}
#ifdef OLD_PROFILE
static int timer_notify(struct notifier_block * self, unsigned long val, void * data)
#else
@ -122,12 +153,9 @@ timer_notify (struct pt_regs *regs)
#ifdef OLD_PROFILE
struct pt_regs * regs = (struct pt_regs *)data;
#endif
void *frame_pointer;
SysprofStackTrace *trace = &(area->traces[area->head]);
int i;
int is_user;
StackFrame frame;
int result;
static atomic_t in_timer_notify = ATOMIC_INIT(1);
int n;
@ -173,7 +201,8 @@ timer_notify (struct pt_regs *regs)
* points to the stack.
*/
esp = (char *)regs + sizeof (struct pt_regs);
eos = (char *)current->thread.REG_STACK_PTR0 - sizeof (struct pt_regs);
eos = (char *)current->thread.REG_STACK_PTR0 -
sizeof (struct pt_regs);
n_bytes = minimum ((char *)eos - esp,
sizeof (trace->kernel_stack));
@ -188,22 +217,13 @@ timer_notify (struct pt_regs *regs)
regs = (struct pt_regs *)eos;
}
i = 0;
trace->addresses[i++] = (void *)regs->REG_INS_PTR;
#ifdef CONFIG_X86_64
heuristic_trace (regs, trace);
#elif CONFIG_X86
framepointer_trace (regs, trace);
#endif
frame_pointer = (void *)regs->REG_FRAME_PTR;
while (((result = read_frame (frame_pointer, &frame)) == 0) &&
i < SYSPROF_MAX_ADDRESSES &&
(unsigned long)frame_pointer >= regs->REG_STACK_PTR)
{
trace->addresses[i++] = (void *)frame.return_address;
frame_pointer = (StackFrame *)frame.next;
}
trace->n_addresses = i;
if (i == SYSPROF_MAX_ADDRESSES)
if (trace->n_addresses == SYSPROF_MAX_ADDRESSES)
trace->truncated = 1;
else
trace->truncated = 0;
@ -227,7 +247,7 @@ static struct notifier_block timer_notifier = {
};
#endif
static int
static ssize_t
sysprof_read(struct file *file, char *buffer, size_t count, loff_t *offset)
{
file->private_data = &(area->traces[area->head]);