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[PATCH] Add oprofile_add_ext_sample

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On ppc64 we look at a profiling register to work out the sample address and
if it was in userspace or kernel.

The backtrace interface oprofile_add_sample does not allow this.  Create
oprofile_add_ext_sample and make oprofile_add_sample use it too.

Signed-off-by: Anton Blanchard <anton@samba.org>
Cc: Philippe Elie <phil.el@wanadoo.fr>
Cc: John Levon <levon@movementarian.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Brian Rogan 2006-03-28 01:56:20 -08:00 committed by Linus Torvalds
parent f83ca9fe3e
commit 273577165c
2 changed files with 20 additions and 3 deletions
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13
drivers/oprofile/cpu_buffer.c
View file

@ -217,11 +217,10 @@ static void oprofile_end_trace(struct oprofile_cpu_buffer * cpu_buf)
cpu_buf->tracing = 0;
}
void oprofile_add_sample(struct pt_regs * const regs, unsigned long event)
void oprofile_add_ext_sample(unsigned long pc, struct pt_regs * const regs,
unsigned long event, int is_kernel)
{
struct oprofile_cpu_buffer * cpu_buf = &cpu_buffer[smp_processor_id()];
unsigned long pc = profile_pc(regs);
int is_kernel = !user_mode(regs);
if (!backtrace_depth) {
log_sample(cpu_buf, pc, is_kernel, event);
@ -238,6 +237,14 @@ void oprofile_add_sample(struct pt_regs * const regs, unsigned long event)
oprofile_end_trace(cpu_buf);
}
void oprofile_add_sample(struct pt_regs * const regs, unsigned long event)
{
int is_kernel = !user_mode(regs);
unsigned long pc = profile_pc(regs);
oprofile_add_ext_sample(pc, regs, event, is_kernel);
}
void oprofile_add_pc(unsigned long pc, int is_kernel, unsigned long event)
{
struct oprofile_cpu_buffer * cpu_buf = &cpu_buffer[smp_processor_id()];

10
include/linux/oprofile.h
View file

@ -61,6 +61,16 @@ void oprofile_arch_exit(void);
*/
void oprofile_add_sample(struct pt_regs * const regs, unsigned long event);
/**
* Add an extended sample. Use this when the PC is not from the regs, and
* we cannot determine if we're in kernel mode from the regs.
*
* This function does perform a backtrace.
*
*/
void oprofile_add_ext_sample(unsigned long pc, struct pt_regs * const regs,
unsigned long event, int is_kernel);
/* Use this instead when the PC value is not from the regs. Doesn't
* backtrace. */
void oprofile_add_pc(unsigned long pc, int is_kernel, unsigned long event);