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If the address is 0x01, treat as kernel, regardless of whether we have a

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Tue Sep 27 01:33:33 2005  Soeren Sandmann  <sandmann@redhat.com>

	* process.c (process_lookup_symbol): If the address is 0x01, treat
	as kernel, regardless of whether we have a map for that address or
	not.

	* module/sysprof-module.c (timer_notify): Take a stack trace of
	the current process, even when we are in kernel mode. This way we
	can assign kernel activity to individual user space stacktraces.

	* TODO: updates.
This commit is contained in:
Soeren Sandmann
2005-09-27 05:35:19 +00:00
committed by Søren Sandmann Pedersen
parent 665d680c46
commit bce3b1fea6
5 changed files with 77 additions and 69 deletions
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62
module/sysprof-module.c
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@ -452,53 +452,43 @@ timer_notify (struct pt_regs *regs)
is_user = user_mode(regs);
if (!current || current->pid == 0)
if (!current || current->pid == 0 || !current->mm)
return 0;
if (is_user && current->state != TASK_RUNNING)
return 0;
memset(trace, 0, sizeof (SysprofStackTrace));
trace->pid = current->pid;
i = 0;
if (!is_user)
{
/* kernel */
trace->pid = current->pid;
trace->truncated = 0;
trace->n_addresses = 1;
/* 0x1 is taken by sysprof to mean "in kernel" */
trace->addresses[0] = (void *)0x1;
trace->addresses[i++] = 0x01;
regs = (void *)current->thread.esp0 - sizeof (struct pt_regs);
}
else
trace->addresses[i++] = (void *)regs->REG_INS_PTR;
frame = (StackFrame *)regs->REG_FRAME_PTR;
while (pages_present (frame) &&
i < SYSPROF_MAX_ADDRESSES &&
((unsigned long)frame) < START_OF_STACK &&
(unsigned long)frame >= regs->REG_STACK_PTR)
{
memset(trace, 0, sizeof (SysprofStackTrace));
trace->pid = current->pid;
trace->truncated = 0;
i = 0;
trace->addresses[i++] = (void *)regs->REG_INS_PTR;
frame = (StackFrame *)regs->REG_FRAME_PTR;
while (pages_present (frame) &&
i < SYSPROF_MAX_ADDRESSES &&
((unsigned long)frame) < START_OF_STACK &&
(unsigned long)frame >= regs->REG_STACK_PTR)
{
trace->addresses[i++] = (void *)frame->return_address;
frame = (StackFrame *)frame->next;
}
trace->n_addresses = i;
if (i == SYSPROF_MAX_ADDRESSES)
trace->truncated = 1;
else
trace->truncated = 0;
trace->addresses[i++] = (void *)frame->return_address;
frame = (StackFrame *)frame->next;
}
trace->n_addresses = i;
if (i == SYSPROF_MAX_ADDRESSES)
trace->truncated = 1;
else
trace->truncated = 0;
if (head++ == &stack_traces[N_TRACES - 1])
head = &stack_traces[0];