diff options
| author | Greg Banks <gnb@melbourne.sgi.com> | 2005-01-04 05:41:45 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-01-04 05:41:45 -0800 |
| commit | 729719d373de31fce77b32341b01476ca53f98c8 (patch) | |
| tree | 16126e6288ba05ef286a4d9ecf5de4ff5b93780f /include/linux | |
| parent | 9a3ed4ef5e77e28427c33745d6317348123714c0 (diff) | |
[PATCH] oprofile: arch-independent code for stack trace sampling
oprofile arch-independent updates, including some internal API changes and
support for stack trace sampling.
Signed-off-by: John Levon <levon@movementarian.org>
Signed-off-by: Greg Banks <gnb@melbourne.sgi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/oprofile.h | 20 |
1 files changed, 15 insertions, 5 deletions
diff --git a/include/linux/oprofile.h b/include/linux/oprofile.h index f17c89c37c72..d6a47c85e603 100644 --- a/include/linux/oprofile.h +++ b/include/linux/oprofile.h @@ -20,6 +20,7 @@ struct super_block; struct dentry; struct file_operations; +struct pt_regs; /* Operations structure to be filled in */ struct oprofile_operations { @@ -34,6 +35,8 @@ struct oprofile_operations { int (*start)(void); /* Stop delivering interrupts. */ void (*stop)(void); + /* Initiate a stack backtrace. Optional. */ + void (*backtrace)(struct pt_regs * const regs, unsigned int depth); /* CPU identification string. */ char * cpu_type; }; @@ -41,11 +44,11 @@ struct oprofile_operations { /** * One-time initialisation. *ops must be set to a filled-in * operations structure. This is called even in timer interrupt - * mode. + * mode so an arch can set a backtrace callback. * - * Return 0 on success. + * If an error occurs, the fields should be left untouched. */ -int oprofile_arch_init(struct oprofile_operations ** ops); +void oprofile_arch_init(struct oprofile_operations * ops); /** * One-time exit/cleanup for the arch. @@ -56,8 +59,15 @@ void oprofile_arch_exit(void); * Add a sample. This may be called from any context. Pass * smp_processor_id() as cpu. */ -extern void oprofile_add_sample(unsigned long eip, unsigned int is_kernel, - unsigned long event, int cpu); +void oprofile_add_sample(struct pt_regs * const regs, unsigned long event); + +/* 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); + +/* add a backtrace entry, to be called from the ->backtrace callback */ +void oprofile_add_trace(unsigned long eip); + /** * Create a file of the given name as a child of the given root, with |